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ebd842f007
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fix(#278): Implement CSRF protection using double-submit cookie pattern
ci/woodpecker/push/woodpecker Pipeline failed
Implemented comprehensive CSRF protection for all state-changing endpoints
(POST, PATCH, DELETE) using the double-submit cookie pattern.
Security Implementation:
- Created CsrfGuard using double-submit cookie validation
- Token set in httpOnly cookie and validated against X-CSRF-Token header
- Applied guard to FederationController (vulnerable endpoints)
- Safe HTTP methods (GET, HEAD, OPTIONS) automatically exempted
- Signature-based endpoints (@SkipCsrf decorator) exempted
Components Added:
- CsrfGuard: Validates cookie and header token match
- CsrfController: GET /api/v1/csrf/token endpoint for token generation
- @SkipCsrf(): Decorator to exempt endpoints with alternative auth
- Comprehensive tests (20 tests, all passing)
Protected Endpoints:
- POST /api/v1/federation/connections/initiate
- POST /api/v1/federation/connections/:id/accept
- POST /api/v1/federation/connections/:id/reject
- POST /api/v1/federation/connections/:id/disconnect
- POST /api/v1/federation/instance/regenerate-keys
Exempted Endpoints:
- POST /api/v1/federation/incoming/connect (signature-verified)
- GET requests (safe methods)
Security Features:
- httpOnly cookies prevent XSS attacks
- SameSite=strict prevents subdomain attacks
- Cryptographically secure random tokens (32 bytes)
- 24-hour token expiry
- Structured logging for security events
Testing:
- 14 guard tests covering all scenarios
- 6 controller tests for token generation
- Quality gates: lint, typecheck, build all passing
Note: Frontend integration required to use tokens. Clients must:
1. GET /api/v1/csrf/token to receive token
2. Include token in X-CSRF-Token header for state-changing requests
Fixes #278
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
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2026-02-03 20:35:00 -06:00 |
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