This fixes critical IndieAuth authentication by implementing PKCE (Proof Key
for Code Exchange) as required by IndieLogin.com API specification.
Added:
- PKCE code_verifier and code_challenge generation (RFC 7636)
- Database column: auth_state.code_verifier for PKCE support
- Issuer validation for authentication callbacks
- Comprehensive PKCE unit tests (6 tests, all passing)
- Database migration script for code_verifier column
Changed:
- Corrected IndieLogin.com API endpoints (/authorize and /token)
- State token validation now returns code_verifier for token exchange
- Authentication flow follows IndieLogin.com API specification exactly
- Enhanced logging with code_verifier redaction
Removed:
- OAuth metadata endpoint (/.well-known/oauth-authorization-server)
Added in v0.7.0 but not required by IndieLogin.com
- h-app microformats markup from templates
Modified in v0.7.1 but not used by IndieLogin.com
- indieauth-metadata link from HTML head
Security:
- PKCE prevents authorization code interception attacks
- Issuer validation prevents token substitution attacks
- Code verifier securely stored, redacted in logs, and single-use
Documentation:
- Version: 0.8.0
- CHANGELOG updated with v0.8.0 entry and v0.7.x notes
- ADR-016 and ADR-017 marked as superseded by ADR-019
- Implementation report created in docs/reports/
- Test update guide created in TODO_TEST_UPDATES.md
Breaking Changes:
- Users mid-authentication will need to restart login after upgrade
- Database migration required before deployment
Related: ADR-019
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Co-Authored-By: Claude <noreply@anthropic.com>
Phil Skentelbery
5e50330bdf