Implements token security and management as specified in ADR-029:
Database Changes (BREAKING):
- Add secure tokens table with SHA256 hashed storage
- Add authorization_codes table for IndieAuth token exchange
- Drop old insecure tokens table (invalidates existing tokens)
- Update SCHEMA_SQL to match post-migration state
Token Management (starpunk/tokens.py):
- Generate cryptographically secure tokens
- Hash tokens with SHA256 for secure storage
- Create and verify access tokens
- Create and exchange authorization codes
- PKCE support (optional but recommended)
- Scope validation (V1: only 'create' scope)
- Token expiry and revocation support
Testing:
- Comprehensive test suite for all token operations
- Test authorization code replay protection
- Test PKCE validation
- Test parameter validation
- Test token expiry
Security:
- Tokens never stored in plain text
- Authorization codes single-use with replay protection
- Optional PKCE for enhanced security
- Proper UTC datetime handling for expiry
Related:
- ADR-029: Micropub IndieAuth Integration Strategy
- Migration 002: Secure tokens and authorization codes
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
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- ADR-016 and ADR-017 marked as superseded by ADR-019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
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
