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Report keychain load errors and keep Touch ID entries protected - #129
Before: MacKeychain.loadPassword returned null for every error, so a cancelled Touch ID prompt looked like no saved password.
After: it returns null only when no entry exists and throws KeychainAccessException otherwise, as the KeychainAccessProvider contract expects. Loads query the data-protection keychain first and fall back to the file-based keychain, so a failure on a protected entry isn't reported as a missing one.
Touch ID entries stay protected
Before: storing with requireOsAuthentication over an existing entry only replaced its data, so an entry saved without protection stayed unprotected under the Touch ID provider.
After: the protected entry is added to the data-protection keychain before any plain copy is removed. TouchIdKeychainAccess protects an entry it finds without protection when loading it, so the user is asked for Touch ID or their password as usual.
Touch ID provider without biometrics
Before: the provider was only supported while biometrics were available, so a closed lid or a biometry lockout at launch made Cryptomator fall back to the macOS Keychain provider.
After: it's supported whenever the user can authenticate with Touch ID or their password, matching the entries' user-presence access control, provided the app has a keychain access group entitlement.
Also
Removed the migration of entries stored under the legacy service name Cryptomator\0, which had stopped finding them.
Service and account names are built from the byte array length instead of reading up to a terminating NUL.
Raised the deployment target to macOS 11, matching Cryptomator's minimum (kSecUseDataProtectionKeychain needs 10.15).
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Walkthrough
Keychain loading now returns password and authentication-protection metadata. Non-missing access failures now raise KeychainAccessException. Native loading checks the data-protection keychain and can fall back to the file-based keychain. Touch ID access protects unprotected entries and verifies the reloaded value. OS authentication availability replaces the Touch ID-only check. The native build target is macOS 11.0, and appearance setters no longer use macOS 10.14 availability guards.
Deleting or changing a Touch ID password can leave the old protected password available. Correct deletion across both keychains before merging.
Pre-merge checks: 4 · 1
Failed checks: 1 warning
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Docstring Coverage
Docstring coverage is 12.82% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 39 functions across 7 files. (1 skipped: …
Write docstrings for the functions missing them to satisfy the coverage threshold.
Passed checks: 4 passed
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Description check
The description clearly explains the keychain error handling, protection behavior, authentication support, migration removal, name conversion fix, and deployment target change.
Title check
The title clearly summarizes two primary changes: reporting keychain load errors and preserving Touch ID entry protection.
Linked Issues check
Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check
Check skipped because no linked issues were found for this pull request.
Full details: Docstring Coverage
Explanation
Docstring coverage is 12.82% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 39 functions across 7 files. (1 skipped: 1 unsupported.)
Resolution
Write docstrings for the functions missing them to satisfy the coverage threshold.
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Actionable comments posted: 1
🪄 Fix comments: Fix CodeRabbit comments on this PR
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Review comments at
@src/main/native/org_cryptomator_macos_keychain_MacKeychain_Native.m:
- Line 158: Update deletePassword to explicitly delete both data-protection and
file-based keychain entries using itemQuery with protected and unprotected
targets. Treat errSecMissingEntitlement from the protected deletion as
errSecItemNotFound, report real errors, and return success when either deletion
succeeds; the protected delete must not use an LAContext.
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Overwriting an existing protected entry deletes what may be the only saved copy before calling SecItemAdd. If the add fails, storePassword throws but the previous password is lost. Delaying deletion of the file-based copy does not help when that copy was removed by an earlier save. Update the protected entry in place, preserving its access control and authenticating as in the branch below; add a new entry only when the update returns errSecItemNotFound.
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Loading a saved password reports failures
MacKeychain.loadPasswordreturnednullfor every error, so a cancelled Touch ID prompt looked like no saved password.nullonly when no entry exists and throwsKeychainAccessExceptionotherwise, as theKeychainAccessProvidercontract expects. Loads query the data-protection keychain first and fall back to the file-based keychain, so a failure on a protected entry isn't reported as a missing one.Touch ID entries stay protected
requireOsAuthenticationover an existing entry only replaced its data, so an entry saved without protection stayed unprotected under the Touch ID provider.TouchIdKeychainAccessprotects an entry it finds without protection when loading it, so the user is asked for Touch ID or their password as usual.Touch ID provider without biometrics
Also
Cryptomator\0, which had stopped finding them.kSecUseDataProtectionKeychainneeds 10.15).Thanks to @kta1kri for the report.