# OAuth2/OIDC Implementation Status
## API Explorer II - Progress Tracker

**Last Updated:** 2024-11-29  
**Branch:** `oauth2`  
**Status:** ✅ Backend Core Complete - Ready for Testing

---

## 📊 Overall Progress: 60% Complete

### Phase Progress
- ✅ Phase 1: Preparation & Setup (100%)
- ✅ Phase 2: Backend OAuth2 Implementation (100%)
- ⬜ Phase 3: Environment Configuration (50%)
- ⬜ Phase 4: Frontend Updates (0%)
- ⬜ Phase 5: Testing (0%)
- ⬜ Phase 6: Documentation & Migration (33%)

---

## ✅ Completed Work

### Phase 1: Preparation & Setup
**Status:** ✅ Complete  
**Commits:** `ba783c0`, `86295f8`

#### Documentation (100%)
- ✅ `OAUTH2-README.md` - Overview and navigation guide
- ✅ `OAUTH2-QUICK-START.md` - Quick setup guide
- ✅ `OAUTH2-OIDC-INTEGRATION-PREP.md` - Complete implementation guide

#### Dependencies (100%)
- ✅ `arctic` - Modern OAuth2/OIDC client library
- ✅ `jsonwebtoken` - JWT parsing and validation
- ✅ `@types/jsonwebtoken` - TypeScript definitions

#### Backend Core Infrastructure (100%)
- ✅ `server/utils/pkce.ts` - PKCE utilities (RFC 7636)
  - Code verifier generation
  - Code challenge generation (S256)
  - State parameter generation
  - Validation functions
  
- ✅ `server/services/OAuth2Service.ts` - OAuth2/OIDC client
  - OIDC discovery document fetching
  - Authorization URL creation with PKCE
  - Token exchange (code → tokens)
  - Token refresh flow
  - UserInfo endpoint integration
  - Token expiration checking
  - Comprehensive error handling
  
- ✅ `server/middlewares/OAuth2AuthorizationMiddleware.ts`
  - Authorization flow initiation
  - PKCE parameter generation
  - Session state management
  - Redirect to OIDC provider
  
- ✅ `server/middlewares/OAuth2CallbackMiddleware.ts`
  - State parameter validation (CSRF protection)
  - Authorization code exchange
  - User info retrieval
  - Session storage
  - Error handling with user-friendly pages
  - Flow timeout protection (10 minutes)
  
- ✅ `server/controllers/OAuth2ConnectController.ts`
  - `/oauth2/connect` endpoint
  - Login initiation
  
- ✅ `server/controllers/OAuth2CallbackController.ts`
  - `/oauth2/callback` endpoint
  - OIDC provider callback handling

### Phase 2: Backend Integration
**Status:** ✅ Complete  
**Commit:** `b2df3a9`

#### Application Integration (100%)
- ✅ `server/app.ts` - OAuth2Service initialization
  - Conditional OAuth2 initialization
  - OIDC discovery on startup
  - Feature flag support (`VITE_USE_OAUTH2`)
  - Error handling and logging
  - Graceful fallback if provider unavailable

#### User Management (100%)
- ✅ `server/controllers/UserController.ts` - Dual auth support
  - OAuth2 user session detection
  - OAuth 1.0a fallback
  - Automatic token refresh
  - Unified user data format
  - Enhanced logout (clears both auth types)

---

## 🚧 In Progress

### Phase 3: Environment Configuration
**Status:** 🟡 Partial (50%)  
**Remaining:** Production environment examples

#### Completed
- ✅ `env_ai` - Development configuration
  - OAuth2 environment variables
  - Feature flag documentation
  - OBP-OIDC configuration

#### TODO
- ⬜ `.env.example` update
- ⬜ Production configuration guide
- ⬜ Docker environment variables

---

## ⬜ Remaining Work

### Phase 4: Frontend Updates (0%)
**Estimated Time:** 1 week

#### Required Changes
- ⬜ `src/components/HeaderNav.vue`
  - Update login button URL (conditional)
  - Update logout button URL
  - Add OAuth2 status indicator (optional)
  
- ⬜ `src/components/ChatWidget.vue`
  - Update authentication check
  - Support OAuth2 user format

- ⬜ Frontend user state management
  - Handle OAuth2 user format
  - Token refresh on API calls
  - Session expiry handling

### Phase 5: Testing (0%)
**Estimated Time:** 1 week

#### Unit Tests
- ⬜ `server/test/pkce.test.ts`
  - Test code verifier generation
  - Test code challenge generation
  - Test state generation
  - Test validation functions
  
- ⬜ `server/test/OAuth2Service.test.ts`
  - Test OIDC discovery
  - Test authorization URL creation
  - Test token exchange
  - Test token refresh
  - Test user info retrieval

#### Integration Tests
- ⬜ Full OAuth2 login flow
- ⬜ Token refresh flow
- ⬜ Logout flow
- ⬜ Error scenarios
- ⬜ Session timeout

#### Manual Testing
- ⬜ Login with OBP-OIDC
- ⬜ Session persistence
- ⬜ Token auto-refresh
- ⬜ Logout
- ⬜ Multiple browsers/devices
- ⬜ Error handling

### Phase 6: Documentation (33%)
**Estimated Time:** Ongoing

#### Completed
- ✅ OAuth2 preparation documents
- ✅ Quick start guide
- ✅ Implementation tracking (this file)

#### TODO
- ⬜ Update main `README.md`
- ⬜ Create migration guide
- ⬜ Create troubleshooting guide
- ⬜ Update deployment documentation
- ⬜ Create admin guide

---

## 🎯 Next Steps (Priority Order)

### Immediate (This Week)
1. **Test Backend Implementation**
   - Start OBP-OIDC server
   - Configure environment variables
   - Test `/oauth2/connect` endpoint
   - Test `/oauth2/callback` flow
   - Verify session storage
   - Test `/user/current` with OAuth2

2. **Update Frontend Components**
   - Update `HeaderNav.vue` login button
   - Test login flow end-to-end
   - Verify user info display

### Short Term (Next Week)
3. **Write Tests**
   - Unit tests for PKCE utilities
   - Unit tests for OAuth2Service
   - Integration tests for full flow

4. **Complete Documentation**
   - Update main README
   - Create migration guide
   - Troubleshooting guide

### Medium Term
5. **Production Readiness**
   - Security audit
   - Performance testing
   - Production deployment guide
   - Monitoring setup

---

## 📝 Technical Details

### Endpoints Added
- `GET /oauth2/connect` - Initiate OAuth2 login
- `GET /oauth2/callback` - Handle OIDC callback

### Endpoints Modified
- `GET /user/current` - Now supports both auth methods
- `GET /user/logoff` - Clears both OAuth 1.0a and OAuth2 sessions

### Session Keys Used
**OAuth2:**
- `oauth2_state` - CSRF protection state
- `oauth2_code_verifier` - PKCE verifier
- `oauth2_flow_timestamp` - Flow start time
- `oauth2_redirect_page` - Post-auth redirect
- `oauth2_access_token` - JWT access token
- `oauth2_refresh_token` - Refresh token
- `oauth2_id_token` - OpenID Connect ID token
- `oauth2_user` - User information
- `oauth2_user_info` - Full UserInfo response

**OAuth 1.0a (unchanged):**
- `clientConfig` - OAuth 1.0a configuration

### Environment Variables
```bash
# Feature Flag
VITE_USE_OAUTH2=false|true

# Client Credentials
VITE_OBP_OAUTH2_CLIENT_ID=obp-explorer-ii-client
VITE_OBP_OAUTH2_CLIENT_SECRET=<secret>
VITE_OBP_OAUTH2_REDIRECT_URL=http://localhost:5173/oauth2/callback

# OIDC Provider
VITE_OBP_OAUTH2_WELL_KNOWN_URL=http://127.0.0.1:9000/obp-oidc/.well-known/openid-configuration

# Optional
VITE_OBP_OAUTH2_TOKEN_REFRESH_THRESHOLD=300
```

---

## 🔐 Security Features Implemented

- ✅ PKCE (Proof Key for Code Exchange) - RFC 7636
- ✅ State parameter for CSRF protection
- ✅ Code verifier validation (43-128 chars, valid charset)
- ✅ State parameter validation (min 32 chars)
- ✅ Flow timeout protection (10 minute max)
- ✅ Token expiration checking
- ✅ Automatic token refresh
- ✅ Secure session storage (Redis)
- ✅ XSS protection in error pages
- ✅ Comprehensive error handling

---

## 🐛 Known Issues / TODO

### High Priority
- [ ] Test with actual OBP-OIDC server
- [ ] Verify token refresh works correctly
- [ ] Test session timeout behavior
- [ ] Verify CSRF protection

### Medium Priority
- [ ] Add rate limiting to OAuth2 endpoints
- [ ] Add metrics/monitoring
- [ ] Improve error messages
- [ ] Add request ID tracking

### Low Priority
- [ ] Add OAuth2 status page
- [ ] Add admin dashboard for sessions
- [ ] Add token introspection endpoint
- [ ] Support multiple OIDC providers

---

## 📊 Code Statistics

```
Total Files Created: 8
Total Lines Added: ~1,800
Languages: TypeScript
Framework: Express.js, routing-controllers
Dependencies Added: 2 (arctic, jsonwebtoken)

Backend Implementation:
- Services: 1 (OAuth2Service)
- Controllers: 2 (Connect, Callback)
- Middlewares: 2 (Authorization, Callback)
- Utils: 1 (PKCE)

Documentation:
- Preparation docs: 3 files (~3,300 lines)
- Implementation tracking: 1 file (this file)
```

---

## 🧪 Testing Checklist

### Backend Testing
- [ ] PKCE utilities generate valid parameters
- [ ] OAuth2Service initializes from well-known URL
- [ ] Authorization URL contains required parameters
- [ ] Callback validates state parameter
- [ ] Token exchange works correctly
- [ ] User info retrieval works
- [ ] Token refresh works
- [ ] Session cleanup on logout

### Integration Testing
- [ ] Full login flow completes successfully
- [ ] Redirect back to original page works
- [ ] Session persists across requests
- [ ] Token auto-refresh works
- [ ] Logout clears all session data
- [ ] Error handling shows user-friendly messages

### Security Testing
- [ ] State parameter prevents CSRF
- [ ] PKCE prevents code interception
- [ ] Flow timeout prevents replay
- [ ] Tokens stored securely in session
- [ ] XSS protection in error pages

---

## 📞 Support & Resources

### Getting Help
- **Documentation:** See `OAUTH2-QUICK-START.md` for setup
- **Detailed Guide:** See `OAUTH2-OIDC-INTEGRATION-PREP.md`
- **Slack:** #obp-development
- **Email:** dev@tesobe.com

### Quick Commands
```bash
# Start OBP-OIDC
cd ~/Documents/workspace_2024/OBP-OIDC
./run-server.sh

# Start API Explorer II
cd ~/Documents/workspace_2024/API-Explorer-II
npm run dev

# Test OIDC discovery
curl http://localhost:9000/obp-oidc/.well-known/openid-configuration

# Check Redis
redis-cli ping
redis-cli KEYS "sess:*"
```

---

## 🎉 Achievements

✅ **Backend Core Complete** - All OAuth2 infrastructure implemented  
✅ **PKCE Support** - Security best practices implemented  
✅ **Dual Auth Support** - Backward compatibility maintained  
✅ **Comprehensive Documentation** - 3,300+ lines of guides  
✅ **Error Handling** - User-friendly error pages  
✅ **Automatic Token Refresh** - Seamless UX  

---

## 📅 Timeline

| Phase | Start Date | Target End | Actual End | Status |
|-------|-----------|------------|------------|--------|
| Phase 1 | 2024-11-29 | 2024-11-29 | 2024-11-29 | ✅ Complete |
| Phase 2 | 2024-11-29 | 2024-11-29 | 2024-11-29 | ✅ Complete |
| Phase 3 | 2024-11-29 | 2024-12-06 | - | 🟡 In Progress |
| Phase 4 | - | 2024-12-13 | - | ⬜ Pending |
| Phase 5 | - | 2024-12-20 | - | ⬜ Pending |
| Phase 6 | 2024-11-29 | Ongoing | - | 🟡 In Progress |

**Overall Target Completion:** Mid-December 2024  
**Current Pace:** Ahead of schedule

---

**Next Action:** Test backend implementation with OBP-OIDC server