Phase 1: JWT Authentication System with RBAC and Security Features

[satoshi03]

Summary

Implements Phase 1 of the authentication security plan outlined in plans/authentication-security-plan.md. This comprehensive JWT-based authentication system provides enterprise-grade security features while maintaining backward compatibility.

🔐 Authentication Features

• JWT Authentication: Short-lived access tokens (15min) with secure refresh tokens (7 days)
• User Management: Registration, login, logout with secure password hashing (bcrypt)
• Account Security: Automatic lockout after 5 failed login attempts (1-hour duration)
• Token Management: Secure refresh token rotation and automatic revocation on logout

👥 Role-Based Access Control (RBAC)

• viewer: Dashboard viewing only
• user: Dashboard + log synchronization
• admin: Full system access including task execution and user management

📊 Audit & Security Logging

• Complete Audit Trail: All authentication events logged with timestamps
• Security Monitoring: Failed login attempts, permission denials, admin actions
• Detailed Context: IP addresses, user agents, and detailed event information
• Statistics API: Audit log analytics for security monitoring

🚦 Rate Limiting Protection

• API Endpoints: 100 requests/minute general protection
• Auth Endpoints: 10 requests/minute (stricter for security-sensitive operations)
• Task Execution: 5 requests/minute (maximum protection for dangerous operations)
• Smart Limiting: IP-based for anonymous users, user-based for authenticated users

🔧 Configuration & Compatibility

• Backward Compatible: AUTH_ENABLED=false by default - existing installations unaffected
• Environment Configuration: JWT secrets, CORS settings, auth toggle
• Production Ready: Comprehensive error handling and security best practices

Technical Implementation

New Components Added

• internal/services/auth_service.go - JWT authentication and user management
• internal/services/audit_service.go - Security event logging and analytics
• internal/middleware/auth.go - Authentication and authorization middleware
• internal/middleware/ratelimit.go - Rate limiting with configurable thresholds
• internal/handlers/auth_handlers.go - Authentication API endpoints
• Database migrations for users, refresh_tokens, and audit_logs tables

API Endpoints Added

POST /api/auth/register         - User registration
POST /api/auth/login           - User authentication  
POST /api/auth/refresh         - Token refresh
POST /api/auth/logout          - Token revocation
GET  /api/auth/profile         - User profile
GET  /api/auth/validate        - Token validation

# Admin Only
GET  /api/auth/admin/users/:id        - User management
PUT  /api/auth/admin/users/:id/status - User status updates
GET  /api/auth/admin/audit-logs       - Audit log access
GET  /api/auth/admin/audit-logs/stats - Security statistics

Protected Endpoint Groups

• Dashboard APIs: Require authentication when AUTH_ENABLED=true
• Log Sync: Requires logs:sync permission (user+ roles)
• Task Execution: Requires tasks:execute permission (admin only)
• System Management: Requires system:manage permission (admin only)

Security Measures

Password & Account Security

• Minimum 8-character password requirement
• Bcrypt hashing with industry-standard cost
• Account lockout protection against brute force attacks
• Secure session management with token rotation

API Protection

• Rate limiting across all endpoint categories
• CORS configuration with private IP support
• Request/response header security
• Comprehensive input validation

Audit & Monitoring

• All authentication events logged
• Failed login attempt tracking
• Permission denial monitoring
• Admin action auditing
• IP address and user agent tracking

Testing Coverage

Comprehensive Test Suite

• Authentication Service: Registration, login, token validation, refresh, permissions
• Audit Service: Event logging, log retrieval, statistics generation
• Middleware: Authentication, authorization, permission checking, rate limiting
• Rate Limiting: Request throttling, user-based vs IP-based limiting
• Edge Cases: Invalid tokens, expired sessions, account lockouts, permission boundaries

Test Results

# All authentication tests passing
✅ TestAuthService_RegisterUser (0.20s)
✅ TestAuthService_LoginUser (0.20s) 
✅ TestAuthService_ValidateAccessToken (0.08s)
✅ TestAuthMiddleware_RequireAuth (0.07s)
✅ TestAuthMiddleware_RequirePermission (0.12s)
✅ TestRateLimiter (0.00s)

Migration & Deployment

Existing Installations

1. Deploy update with AUTH_ENABLED=false (default)
2. System continues operating normally
3. When ready: set AUTH_ENABLED=true and configure admin users

New Installations

• Authentication disabled by default for easy setup
• Enable in production with AUTH_ENABLED=true
• Create admin user via /api/auth/register endpoint

Environment Variables

AUTH_ENABLED=true          # Enable authentication system
JWT_SECRET=your-secret     # JWT signing secret (auto-generated if not set)
CORS_ALLOWED_ORIGINS=...   # Additional CORS origins

Documentation

• README_AUTHENTICATION.md: Complete usage guide and API documentation
• Migration guide: Step-by-step deployment instructions
• Security considerations: Production deployment best practices
• Troubleshooting: Common issues and solutions

Test Plan

• Verify all existing functionality works with AUTH_ENABLED=false
• Test user registration and login workflows
• Validate JWT token generation and verification
• Confirm role-based access control enforcement
• Test rate limiting across different endpoint types
• Verify audit logging captures all security events
• Test account lockout after failed login attempts
• Validate refresh token rotation and revocation
• Test middleware integration with existing endpoints
• Confirm backward compatibility with existing installations

🤖 Generated with Claude Code