fix(redact): close the remaining #1946 fail-opens — detection coverage + one-time consent

Two of #1946's reported gaps were still open after the v1.64 fail-closed
work (the git-error and oversized-diff paths in bin/gstack-redact-prepush
are already strict, chunked, and pinned by tests):

1. Detection fail-open: env.kv required an UPPERCASE name with an '='
   assignment, so 'api_key=…', 'apiKey: "…"', and 'password: …' — the
   most common real config shapes — produced NO finding at all. The pattern
   is now case-insensitive, accepts ':' (YAML/JSON) as well as '='
   assignment, and handles quoted JSON keys. It stays MEDIUM and
   entropy-gated per the calibration rule (a generic net that cries wolf
   gets bypassed), with pinned cases for each closed shape plus the
   placeholder/entropy negatives.

2. Install fail-open: nothing ever offered the guard, so a plain 'git
   push' scanned nothing and users believing themselves protected weren't.
   setup now asks ONCE for consent on a real interactive terminal
   (maintainer decision 6): an explicit answer is recorded to the existing
   redact_prepush_hook key and never re-asked; a timeout or non-interactive
   run changes nothing and keeps the hint-only posture. Default stays
   FALSE, and setup still never installs the hook itself — /ship owns the
   per-repo install (the wrong-repo invariant is pinned by the existing
   'setup carries the hint only' test).

Tests: per-shape pattern cases, prompt gating statics (key-absence + TTY +
timed default-N read), timeout-persists-nothing, non-interactive stays
hint-only with no key write, and recorded-answer-is-silent behavior runs.

Contributes to #1946 (the pre-push guard's fail-closed scan paths landed
in earlier releases; this closes the coverage and consent gaps it names).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
This commit is contained in:
Garry Tan
2026-08-16 09:49:31 -07:00
co-authored by Claude Fable 5
parent 9af589bb73
commit 9c0de5fed1
4 changed files with 148 additions and 12 deletions
+11 -2
View File
@@ -504,8 +504,17 @@ export const PATTERNS: RedactPattern[] = [
id: "env.kv",
tier: "MEDIUM",
category: "secret",
description: "Env-style SECRET assignment with high-entropy value",
regex: /^[ \t]*(?:export[ \t]+)?[A-Z][A-Z0-9_]*(?:KEY|TOKEN|SECRET|PASSWORD|PASSWD|CREDENTIALS?|DSN|AUTH|COOKIE|SESSION|PRIVATE)[ \t]*=[ \t]*['"]?([^\s'"]{8,})['"]?/,
description: "Secret-named assignment (env/YAML/JSON) with high-entropy value",
// #1946 gap 3: the original shape required an UPPERCASE name and an `=`
// assignment, so `api_key=…`, `apiKey: "…"`, and `password: …` (YAML/JSON
// colon form) produced NO finding at all — a detection fail-open on the
// most common config shapes. Now case-insensitive with `:` or `=`
// assignment and optional quotes around the key (JSON). Still MEDIUM and
// entropy-gated: this is the calibrated generic net, not a blocker.
// The name part is `[A-Za-z0-9_.-]*` + suffix (zero-or-more prefix, not
// one-or-more): a mandatory first char would swallow the suffix's own
// first letter and bare names like `password:` / `key:` would never match.
regex: /^[ \t]*(?:export[ \t]+)?["']?[A-Za-z0-9_.-]*(?:KEY|TOKEN|SECRET|PASSWORD|PASSWD|CREDENTIALS?|DSN|AUTH|COOKIE|SESSION|PRIVATE)["']?[ \t]*[:=][ \t]*["']?([^\s'"]{8,})["']?/i,
// Only fire on high-entropy values — kills `FOO_KEY=changeme` FPs.
validate: (span) =>
!isPlaceholderSpan(span) &&