fix(biometric) Incorrect error reported on Android with no device passcode set and fallback allowed (#2648)

* Fix incorrect error being reported in certain cases with fallback allowed

* Add change file

* Rework original solution due to overlooking authenticators logic on API >= `Build.VERSION_CODES.R`

* fix(biometric): don't cast the Android error message to String

* fix(biometric): report a missing device credential before showing the Android prompt

Replaces the override of ERROR_NO_BIOMETRICS in the prompt callback, which keyed on
the caller's flag rather than the device state and missed the no-hardware errors.

* fix(biometric): load the missing device credential message from a string resource

* chore(biometric): drop stray semicolon

* docs(biometric): mention the passcodeNotSet error code rename in the change file

* test(e2e): cover the biometric passcodeNotSet rejection on Android

---------

Co-authored-by: Lucas Nogueira <lucas@tauri.app>
This commit is contained in:
Patrick F.andLucas Nogueira authored and GitHub committed 2026-10-11 21:56:38 -03:00
1 parent 2ebe54abce
commit dff0dd4b23
6 files changed
+102 -34

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@@ -0,0 +1,6 @@
---
"biometric": patch:bug
"biometric-js": patch:bug
---
Fix biometric plugin reporting an inconsistent and incorrect error on Android when no device passcode was set and `allowDeviceCredential` is enabled. Android now rejects with the `passcodeNotSet` error code like iOS does; it previously used the undocumented `noDeviceCredential` code, so code matching that string must switch to `passcodeNotSet`.
+25 -24
View File
@@ -64,30 +64,31 @@ The example only registers each plugin on the platforms it supports, so the suit
split three ways: desktop-only plugins are skipped on mobile, mobile-only plugins are
skipped on desktop, and the rest run everywhere with the odd test gated.
| Plugin | Coverage | On mobile |
| ------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ---------------------------------------------------------------------------------------- |
| `autostart` | enable/disable/isEnabled, restoring the host's original state. | Skipped — desktop-only plugin. |
| `cli` | `getMatches` shape for an argument-less launch. | Skipped — desktop-only plugin. |
| `clipboard-manager` | text, HTML and image round-trips, `clear`, error paths. | Text only; HTML and images are unsupported there. |
| `deep-link` | `getCurrent` on a plain launch, `onOpenUrl` delivery, runtime `register`/`isRegistered`/`unregister` on Linux and Windows. | Only that runtime registration is unsupported. |
| `dialog` | Only that the API is registered — every dialog blocks on native UI the driver cannot operate. | Same. |
| `fs` | read/write/stat/copy/rename/remove/truncate, `FileHandle`, line iteration, watchers, scope. | All but the watchers (`fs:allow-watch` is desktop-only here). |
| `global-shortcut` | register/unregister/isRegistered/unregisterAll and error paths. Shortcuts cannot be triggered. | Skipped — desktop-only plugin. |
| `http` | `fetch` methods, headers, JSON/bytes/multipart bodies, the cookie jar, abort, scope, failures. | Same. |
| `log` | `attachLogger`/`attachConsole` for webview and Rust records, level filtering. | Same. |
| `notification` | Permission model and the `window.Notification` override. Sending is fire-and-forget and display is not observable. | Action types, pending/active lists after cancel/remove, channels, listeners — see below. |
| `opener` | Scope enforcement only — a successful open launches an external app the suite cannot close. | Same. |
| `os` | Every function but `version` (which has nothing to compare against), checked against what the app was built for and the host. | Same, minus `hostname`. |
| `positioner` | Screen and tray positions (with a tray rect handed in through `handleIconState`), `moveWindowConstrained`, the missing-tray error (WM dependent). | Skipped — desktop-only plugin. |
| `process` | Only that the API is registered — `exit`/`relaunch` terminate the app under test. | Same. |
| `shell` | `execute`, `spawn` with stdout/stderr/close events, stdin, `kill`, scope enforcement. | Scope only on iOS, which cannot spawn a process at all. |
| `sql` | SQLite `load`/`execute`/`select`/`close`, bound values, column types, app-registered migrations, error paths. | Same. |
| `store` | CRUD, persistence, auto-save, defaults/reset, reload, `getStore`, `LazyStore`, change events. | Same. |
| `updater` | `check` against the fixture manifest (update / 204 / older release). Installing is never exercised. | Skipped — desktop-only plugin. |
| `upload` | `download` and `upload` with progress, methods, headers and error paths. | Same (through `adb reverse` on Android). |
| `websocket` | Text/binary echo, ping/pong, handshake headers, listener removal, server and client close, connection and argument errors, against the fixture server. | Same (through `adb reverse` on Android). |
| `window-state` | `filename`, save/restore, and that a re-created window gets its saved size (WM dependent). | Skipped — desktop-only plugin. |
| mobile-only plugins | `barcode-scanner`, `biometric`, `geolocation`, `haptics` and `nfc` need hardware or native UI the driver cannot operate, so only their global API surface is asserted. | Only there. |
| Plugin | Coverage | On mobile |
| ------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------- | ---------------------------------------------------------------------------------------- |
| `autostart` | enable/disable/isEnabled, restoring the host's original state. | Skipped — desktop-only plugin. |
| `cli` | `getMatches` shape for an argument-less launch. | Skipped — desktop-only plugin. |
| `clipboard-manager` | text, HTML and image round-trips, `clear`, error paths. | Text only; HTML and images are unsupported there. |
| `deep-link` | `getCurrent` on a plain launch, `onOpenUrl` delivery, runtime `register`/`isRegistered`/`unregister` on Linux and Windows. | Only that runtime registration is unsupported. |
| `dialog` | Only that the API is registered — every dialog blocks on native UI the driver cannot operate. | Same. |
| `fs` | read/write/stat/copy/rename/remove/truncate, `FileHandle`, line iteration, watchers, scope. | All but the watchers (`fs:allow-watch` is desktop-only here). |
| `global-shortcut` | register/unregister/isRegistered/unregisterAll and error paths. Shortcuts cannot be triggered. | Skipped — desktop-only plugin. |
| `http` | `fetch` methods, headers, JSON/bytes/multipart bodies, the cookie jar, abort, scope, failures. | Same. |
| `log` | `attachLogger`/`attachConsole` for webview and Rust records, level filtering. | Same. |
| `notification` | Permission model and the `window.Notification` override. Sending is fire-and-forget and display is not observable. | Action types, pending/active lists after cancel/remove, channels, listeners — see below. |
| `opener` | Scope enforcement only — a successful open launches an external app the suite cannot close. | Same. |
| `os` | Every function but `version` (which has nothing to compare against), checked against what the app was built for and the host. | Same, minus `hostname`. |
| `positioner` | Screen and tray positions (with a tray rect handed in through `handleIconState`), `moveWindowConstrained`, the missing-tray error (WM dependent). | Skipped — desktop-only plugin. |
| `process` | Only that the API is registered — `exit`/`relaunch` terminate the app under test. | Same. |
| `shell` | `execute`, `spawn` with stdout/stderr/close events, stdin, `kill`, scope enforcement. | Scope only on iOS, which cannot spawn a process at all. |
| `sql` | SQLite `load`/`execute`/`select`/`close`, bound values, column types, app-registered migrations, error paths. | Same. |
| `store` | CRUD, persistence, auto-save, defaults/reset, reload, `getStore`, `LazyStore`, change events. | Same. |
| `updater` | `check` against the fixture manifest (update / 204 / older release). Installing is never exercised. | Skipped — desktop-only plugin. |
| `upload` | `download` and `upload` with progress, methods, headers and error paths. | Same (through `adb reverse` on Android). |
| `websocket` | Text/binary echo, ping/pong, handshake headers, listener removal, server and client close, connection and argument errors, against the fixture server. | Same (through `adb reverse` on Android). |
| `window-state` | `filename`, save/restore, and that a re-created window gets its saved size (WM dependent). | Skipped — desktop-only plugin. |
| `biometric` | The `passcodeNotSet` rejection when `allowDeviceCredential` is set and the device has no lock screen (checked over `adb`), the only path that skips the prompt. | Android only; skipped on desktop. |
| mobile-only plugins | `barcode-scanner`, `geolocation`, `haptics` and `nfc` need hardware or native UI the driver cannot operate, so only their global API surface is asserted. | Only there. |
The notification permission specs are desktop-only: a mobile app starts out ungranted and
`requestPermission` puts up a system dialog the session would then block on. The rest of the
@@ -0,0 +1,52 @@
// Copyright 2019-2023 Tauri Programme within The Commons Conservancy
// SPDX-License-Identifier: Apache-2.0
// SPDX-License-Identifier: MIT
import path from 'node:path'
import { spawnSync } from 'node:child_process'
import { expect } from '@wdio/globals'
import { tauri, describePlugin, platform } from '../helpers/index.js'
// A successful authentication needs a finger or a face, which the driver cannot
// provide, so only the paths that reject without showing the prompt are covered.
/**
* Whether the Android device has no lock screen credential (the default on a
* fresh emulator). `locksettings verify` succeeds without a credential only then.
*/
function androidHasNoLockCredential(): boolean {
const sdk = process.env.ANDROID_HOME ?? process.env.ANDROID_SDK_ROOT
const adb = sdk ? path.join(sdk, 'platform-tools', 'adb') : 'adb'
const device = process.env.E2E_ANDROID_DEVICE
? ['-s', process.env.E2E_ANDROID_DEVICE]
: []
const result = spawnSync(
adb,
[...device, 'shell', 'locksettings', 'verify'],
{ encoding: 'utf8', timeout: 20_000 }
)
return result.status === 0 && /verified successfully/.test(result.stdout)
}
describePlugin('biometric', { mobileOnly: true }, () => {
// Android only, where the lock screen state can be read over adb.
const itNoLockCredential =
platform === 'android' && androidHasNoLockCredential() ? it : it.skip
itNoLockCredential(
'rejects with passcodeNotSet when the fallback is allowed and no credential is set',
async () => {
const code = await tauri(async (api) => {
try {
await api.biometric.authenticate('e2e', {
allowDeviceCredential: true
})
return 'resolved'
} catch (error) {
return (error as { code?: string }).code ?? null
}
})
expect(code).toBe('passcodeNotSet')
}
)
})
@@ -38,14 +38,23 @@ class BiometricActivity : AppCompatActivity() {
var title = intent.getStringExtra(BiometricPlugin.TITLE)
val subtitle = intent.getStringExtra(BiometricPlugin.SUBTITLE)
val description = intent.getStringExtra(BiometricPlugin.REASON)
allowDeviceCredential = false
val allowDeviceCredentialArg = intent.getBooleanExtra(BiometricPlugin.DEVICE_CREDENTIAL, false)
// Android docs say we should check if the device is secure before enabling device credential fallback
val manager = getSystemService(
Context.KEYGUARD_SERVICE
) as KeyguardManager
if (manager.isDeviceSecure) {
allowDeviceCredential =
intent.getBooleanExtra(BiometricPlugin.DEVICE_CREDENTIAL, false)
val allowDeviceCredential = allowDeviceCredentialArg && manager.isDeviceSecure
// Android requires a secure lock screen to enroll biometrics, so with the fallback
// allowed and no device credential set there is nothing to authenticate with.
// Report it up front (like iOS does) instead of relying on the prompt's error.
if (allowDeviceCredentialArg && !manager.isDeviceSecure) {
finishActivity(
BiometryResultType.ERROR,
BiometricPrompt.ERROR_NO_DEVICE_CREDENTIAL,
getString(R.string.tauri_biometric_no_device_credential)
)
return
}
if (title.isNullOrEmpty()) {
@@ -73,6 +82,7 @@ class BiometricActivity : AppCompatActivity() {
if (negativeButtonText.isNullOrEmpty()) "Cancel" else negativeButtonText
)
}
builder.setConfirmationRequired(
intent.getBooleanExtra(BiometricPlugin.CONFIRMATION_REQUIRED, true)
)
@@ -89,7 +99,7 @@ class BiometricActivity : AppCompatActivity() {
finishActivity(
BiometryResultType.ERROR,
errorCode,
errorMessage as String
errorMessage.toString()
)
}
@@ -122,8 +132,4 @@ class BiometricActivity : AppCompatActivity() {
setResult(Activity.RESULT_OK, intent)
finish()
}
companion object {
var allowDeviceCredential = false
}
}
@@ -73,7 +73,7 @@ class BiometricPlugin(private val activity: Activity): Plugin(activity) {
biometryErrorCodeMap[BiometricPrompt.ERROR_LOCKOUT_PERMANENT] = "biometryLockout"
biometryErrorCodeMap[BiometricPrompt.ERROR_NEGATIVE_BUTTON] = "userCancel"
biometryErrorCodeMap[BiometricPrompt.ERROR_NO_BIOMETRICS] = "biometryNotEnrolled"
biometryErrorCodeMap[BiometricPrompt.ERROR_NO_DEVICE_CREDENTIAL] = "noDeviceCredential"
biometryErrorCodeMap[BiometricPrompt.ERROR_NO_DEVICE_CREDENTIAL] = "passcodeNotSet"
biometryErrorCodeMap[BiometricPrompt.ERROR_NO_SPACE] = "systemCancel"
biometryErrorCodeMap[BiometricPrompt.ERROR_TIMEOUT] = "systemCancel"
biometryErrorCodeMap[BiometricPrompt.ERROR_UNABLE_TO_PROCESS] = "systemCancel"
@@ -0,0 +1,3 @@
<resources>
<string name="tauri_biometric_no_device_credential">No device credential set</string>
</resources>