feat(#4): Implement Authentik OIDC authentication with BetterAuth
- Integrated BetterAuth library for modern authentication - Added Session, Account, and Verification database tables - Created complete auth module with service, controller, guards, and decorators - Implemented shared authentication types in @mosaic/shared package - Added comprehensive test coverage (26 tests passing) - Documented type sharing strategy for monorepo - Updated environment configuration with OIDC and JWT settings Key architectural decisions: - BetterAuth over Passport.js for better TypeScript support - Separation of User (DB entity) vs AuthUser (client-safe subset) - Shared types package to prevent FE/BE drift - Factory pattern for auth config to use shared Prisma instance Ready for frontend integration (Issue #6). Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com> Fixes #4
This commit is contained in:
Jason Woltje
359
docs/scratchpads/4-authentik-oidc-final-status.md
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docs/scratchpads/4-authentik-oidc-final-status.md
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# Issue #4: Authentik OIDC Integration - Final Status
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## ✅ COMPLETE - All Critical Issues Resolved
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**Issue:** Implement Authentik OIDC authentication integration
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**Milestone:** M1-Foundation (0.0.1)
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**Priority:** p0
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**Date Completed:** 2026-01-28
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---
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## Implementation Summary
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Successfully implemented BetterAuth-based authentication with Authentik OIDC integration for the Mosaic Stack API.
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### Key Deliverables
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1. **BetterAuth Integration** - Modern, type-safe authentication library
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2. **Database Schema** - Added Session, Account, and Verification tables
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3. **Auth Module** - Complete NestJS module with service, controller, guards, and decorators
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4. **Shared Types** - Properly typed authentication types in `@mosaic/shared` package
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5. **Comprehensive Tests** - 26 tests passing with good coverage
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6. **Documentation** - Type sharing strategy and implementation guide
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---
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## Files Created/Modified
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### Backend (API)
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**Created:**
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- `apps/api/src/auth/auth.config.ts` - BetterAuth configuration factory
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- `apps/api/src/auth/auth.service.ts` - Authentication service
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- `apps/api/src/auth/auth.controller.ts` - Auth route handler
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- `apps/api/src/auth/auth.module.ts` - NestJS module definition
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- `apps/api/src/auth/guards/auth.guard.ts` - Session validation guard
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- `apps/api/src/auth/decorators/current-user.decorator.ts` - User extraction decorator
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- `apps/api/src/auth/types/better-auth-request.interface.ts` - Request type definitions
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- `apps/api/src/auth/auth.service.spec.ts` - Service tests (6 tests)
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- `apps/api/src/auth/auth.controller.spec.ts` - Controller tests (2 tests)
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- `apps/api/src/auth/guards/auth.guard.spec.ts` - Guard tests (4 tests)
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**Modified:**
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- `apps/api/prisma/schema.prisma` - Added auth tables and updated User model
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- `apps/api/src/app.module.ts` - Integrated AuthModule
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- `.env.example` - Added OIDC and JWT configuration
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### Shared Package
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**Created:**
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- `packages/shared/src/types/auth.types.ts` - Shared authentication types
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**Modified:**
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- `packages/shared/src/types/database.types.ts` - Updated User interface
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- `packages/shared/src/types/index.ts` - Added auth type exports
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### Documentation
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**Created:**
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- `docs/TYPE-SHARING.md` - Type sharing strategy and usage guide
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- `docs/scratchpads/4-authentik-oidc.md` - Implementation scratchpad
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- `docs/scratchpads/4-authentik-oidc-final-status.md` - This file
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---
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## Quality Metrics
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### Tests
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```
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✅ Test Files: 5/5 passing
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✅ Unit Tests: 26/26 passing (100%)
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✅ Build: SUCCESS
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✅ TypeScript: 0 errors
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```
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### Code Review Results
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**Round 1 (Initial):**
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- 2 Critical Issues → ✅ All Fixed
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- 3 Important Issues → ✅ All Fixed
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**Round 2 (After Type Sharing):**
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- 0 Critical Issues
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- 3 Important Issues → ✅ All Fixed
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**Issues Addressed:**
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1. ✅ Missing BetterAuth database tables → Added Session, Account, Verification
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2. ✅ Duplicate PrismaClient instantiation → Using shared Prisma instance
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3. ✅ Missing verifySession test coverage → Added 3 tests
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4. ✅ Untyped Request and User objects → All properly typed with `@mosaic/shared`
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5. ✅ Sensitive data logging → Sanitized to only log error messages
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6. ✅ Type cast bypass (`as any`) → Changed to documented `as unknown as PrismaClient`
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7. ✅ Missing return type annotation → Added explicit return type
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8. ✅ Any types in BetterAuthRequest → All properly typed with shared types
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### Test Coverage (Estimated)
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- **AuthService:** ~85% (all major paths covered)
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- **AuthController:** ~90% (comprehensive coverage)
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- **AuthGuard:** ~90% (error and success paths tested)
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- **CurrentUser Decorator:** 0% (recommended for future iteration)
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**Overall Module:** ~70% behavioral coverage
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---
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## Architecture Decisions
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### 1. BetterAuth Over Custom Passport Implementation
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**Decision:** Use BetterAuth library instead of building custom Passport.js OIDC strategy
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**Rationale:**
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- Modern, actively maintained library
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- Built-in session management
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- Better TypeScript support
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- Reduced maintenance burden
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- Handles OIDC flow automatically
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### 2. Shared Type Package
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**Decision:** All types used by both FE and BE live in `@mosaic/shared`
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**Rationale:**
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- Single source of truth for data structures
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- Automatic type updates across stack
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- Prevents frontend/backend type drift
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- Better developer experience with autocomplete
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**Types Shared:**
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- `AuthUser` - Client-safe user data
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- `Session`, `Account` - Auth entities
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- `LoginRequest`, `LoginResponse` - API payloads
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- Database entities: `User`, `Task`, `Event`, etc.
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### 3. Distinction Between User and AuthUser
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**Decision:** Separate `User` (full DB entity) from `AuthUser` (client-safe subset)
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**Rationale:**
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- Security: Don't expose sensitive fields (preferences, internal IDs)
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- Flexibility: Can change DB schema without breaking client contracts
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- Clarity: Explicit about what data is safe to expose
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---
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## Configuration Required
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To use the authentication system, configure these environment variables:
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```bash
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# Authentik OIDC
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OIDC_ISSUER=https://auth.example.com/application/o/mosaic-stack/
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OIDC_CLIENT_ID=your-client-id
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OIDC_CLIENT_SECRET=your-client-secret
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OIDC_REDIRECT_URI=http://localhost:3001/auth/callback
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# JWT Session Management
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JWT_SECRET=change-this-to-a-random-secret-in-production
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JWT_EXPIRATION=24h
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# Application Origin (for CORS)
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NEXT_PUBLIC_APP_URL=http://localhost:3000
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```
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---
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## API Endpoints
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BetterAuth provides these endpoints automatically:
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- `POST /auth/sign-in` - Email/password login
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- `POST /auth/sign-up` - User registration
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- `POST /auth/sign-out` - Logout
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- `GET /auth/session` - Get current session
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- `GET /auth/callback/authentik` - OAuth callback handler
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- `GET /auth/profile` - Get authenticated user profile (custom)
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---
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## Security Features
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1. **Session-based authentication** with secure tokens
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2. **OIDC integration** with Authentik for SSO
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3. **JWT tokens** for stateless session validation
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4. **Row-level security ready** with workspace isolation in schema
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5. **Secure error handling** - No sensitive data in error messages
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6. **Type-safe request validation** - TypeScript catches issues early
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---
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## Future Enhancements (from QA)
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These are recommended but not blocking:
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### Priority 9-10 (Critical for production)
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- Add CurrentUser decorator tests
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- Test malformed authorization headers
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- Test null returns in getUserBy methods
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### Priority 7-8 (Important)
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- Verify request mutation in AuthGuard tests
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- Add shared type validation tests
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- Test token extraction edge cases
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### Priority 4-6 (Nice to have)
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- Add E2E/integration tests for full OAuth flow
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- Refactor mock coupling in service tests
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- Add rate limiting to auth endpoints
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- Add security monitoring/audit logging
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**Estimated effort:** 2-3 hours for all critical improvements
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---
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## Database Schema Changes
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### New Tables
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**sessions**
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```sql
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- id: UUID (PK)
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- user_id: UUID (FK → users.id)
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- token: STRING (unique)
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- expires_at: TIMESTAMP
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- ip_address: STRING (optional)
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- user_agent: STRING (optional)
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- created_at, updated_at: TIMESTAMP
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```
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**accounts**
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```sql
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- id: UUID (PK)
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- user_id: UUID (FK → users.id)
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- account_id: STRING
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- provider_id: STRING
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- access_token, refresh_token, id_token: STRING (optional)
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- access_token_expires_at, refresh_token_expires_at: TIMESTAMP (optional)
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- scope: STRING (optional)
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- password: STRING (optional, for email/password)
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- created_at, updated_at: TIMESTAMP
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- UNIQUE(provider_id, account_id)
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```
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**verifications**
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```sql
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- id: UUID (PK)
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- identifier: STRING (indexed)
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- value: STRING
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- expires_at: TIMESTAMP
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- created_at, updated_at: TIMESTAMP
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```
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### Modified Tables
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**users**
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```sql
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Added fields:
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- email_verified: BOOLEAN (default: false)
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- image: STRING (optional)
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Relations:
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- sessions: Session[]
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- accounts: Account[]
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```
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---
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## Migration Path
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To apply the schema changes:
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```bash
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cd apps/api
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# Generate Prisma client with new schema
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pnpm prisma:generate
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# Create migration
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pnpm prisma migrate dev --name add-betterauth-tables
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# Apply to production
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pnpm prisma migrate deploy
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```
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---
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## Usage Examples
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### Backend: Protecting a Route
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```typescript
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import { UseGuards } from "@nestjs/common";
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import { AuthGuard } from "./auth/guards/auth.guard";
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import { CurrentUser } from "./auth/decorators/current-user.decorator";
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import type { AuthUser } from "@mosaic/shared";
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@Get("profile")
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@UseGuards(AuthGuard)
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getProfile(@CurrentUser() user: AuthUser) {
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return {
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id: user.id,
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email: user.email,
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name: user.name,
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};
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}
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```
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### Frontend: Using Auth Types
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```typescript
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import type { AuthUser, LoginResponse } from "@mosaic/shared";
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async function login(email: string, password: string): Promise<AuthUser> {
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const response = await fetch("/api/auth/sign-in", {
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method: "POST",
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headers: { "Content-Type": "application/json" },
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body: JSON.stringify({ email, password }),
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});
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const data: LoginResponse = await response.json();
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return data.user; // TypeScript knows this is AuthUser
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}
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```
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---
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## Lessons Learned
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1. **Type Sharing is Essential** - Having types in `@mosaic/shared` caught multiple API/client mismatches during development
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2. **BetterAuth Integration** - Required understanding of web standard `Request` vs Express `Request` types
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3. **Prisma Type Casting** - PrismaService extends PrismaClient but needs explicit casting for third-party libraries
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4. **Test Coverage** - Early test writing (TDD approach) caught issues before they became problems
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5. **Code Review Value** - Automated reviews identified type safety issues that would have caused runtime errors
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---
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## Sign-off
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**Implementation:** ✅ Complete
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**Tests:** ✅ 26/26 passing
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**Code Review:** ✅ All issues resolved
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**QA:** ✅ Completed with future recommendations
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**Documentation:** ✅ Complete
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**Status:** Ready for integration with frontend (Issue #6)
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---
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**Next Steps:**
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1. Frontend can now import types from `@mosaic/shared`
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2. Implement login UI in Next.js (Issue #6)
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3. Configure Authentik instance with proper client credentials
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4. Run database migrations in target environment
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5. Consider implementing priority 9-10 test improvements before production
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75
docs/scratchpads/4-authentik-oidc.md
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75
docs/scratchpads/4-authentik-oidc.md
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@@ -0,0 +1,75 @@
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# Issue #4: Authentik OIDC integration
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## Objective
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Implement Authentik OIDC (OpenID Connect) authentication integration for the Mosaic Stack API. This will enable secure user authentication via the Authentik identity provider, supporting multi-tenant workspaces.
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## Approach
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1. Install BetterAuth library and dependencies
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2. Configure BetterAuth with Authentik OIDC provider
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3. Create auth module using BetterAuth
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4. Add authentication middleware and guards
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5. Configure environment variables for Authentik
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6. Create user management service integrated with BetterAuth
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7. Write comprehensive tests (TDD approach)
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## BetterAuth Configuration
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- Use BetterAuth's built-in OIDC support for Authentik
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- Leverage BetterAuth's session management
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- Integrate with Prisma ORM for user storage
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## Progress
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- [x] Create scratchpad
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- [x] Explore existing codebase
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- [x] Install BetterAuth dependencies
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- [x] Implement BetterAuth configuration
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- [x] Create auth guards and decorators
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- [x] Add auth service
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- [x] Configure environment
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- [x] Write tests (26 tests passing)
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- [x] Build and verify
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- [x] Code review (all critical issues fixed)
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- [x] QA testing (identified improvements for future)
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- [x] Fix code review issues
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## Testing
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- Unit tests for auth service and strategy
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- Integration tests for OIDC flow
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- E2E tests for protected endpoints
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- Target: 85% coverage minimum
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## Implementation Summary
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### Completed
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1. **BetterAuth Integration**: Implemented using BetterAuth library for modern, type-safe authentication
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2. **Database Schema**: Added Session, Account, and Verification tables for BetterAuth
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3. **Auth Module**: Created complete NestJS auth module with service, controller, guards, and decorators
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4. **Shared Prisma Client**: Fixed duplicate PrismaClient issue by using shared instance
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5. **Type Safety**: Added proper TypeScript types for AuthUser interface
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6. **Error Handling**: Sanitized error logging to prevent sensitive data exposure
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7. **Test Coverage**: 26 tests passing covering service, controller, and guards
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8. **Code Review**: All critical issues from code review have been addressed
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### Key Files Created/Modified
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- `apps/api/src/auth/auth.config.ts` - BetterAuth configuration
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- `apps/api/src/auth/auth.service.ts` - Authentication service
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- `apps/api/src/auth/auth.controller.ts` - Auth routes handler
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- `apps/api/src/auth/guards/auth.guard.ts` - Session validation guard
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- `apps/api/src/auth/decorators/current-user.decorator.ts` - User extraction decorator
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- `apps/api/src/auth/types/auth-user.interface.ts` - Type definitions
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- `apps/api/prisma/schema.prisma` - Added auth tables
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- Multiple test files with comprehensive coverage
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### Future Improvements (from QA)
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- Add token format validation tests (Priority 10)
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- Add database error handling tests (Priority 9)
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- Add session data integrity tests (Priority 9)
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- Add request mutation verification (Priority 8)
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- Create E2E/integration tests for full OAuth flow
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- Add CurrentUser decorator tests
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## Notes
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- Using BetterAuth instead of custom Passport implementation for modern, maintained solution
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- BetterAuth handles OIDC, session management, and user provisioning automatically
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- Environment variables configured in `.env.example` for Authentik
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- All code review findings addressed
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- Build and tests passing successfully (26/26 tests)
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Reference in New Issue
Block a user