This document outlines the comprehensive security features implemented in the Sports Buddy App.

• JWT Token Verification: All protected routes verify Supabase JWT tokens
• User Context: Authenticated user information is available in req.user
• Token Extraction: Bearer tokens extracted from Authorization headers
• Session Management: Automatic token refresh handled by Supabase client

• Requires valid JWT token for access
• Used on all protected endpoints
• Adds user information to request object

• Ensures users can only access/modify their own resources
• Used for profile updates and user-specific operations

• Ensures only match creators can modify their matches
• Database-level verification for additional security

• Allows both authenticated and anonymous access
• Used for public content that benefits from user context

• Limit: 1000 requests per 15 minutes per IP
• Purpose: Prevents general API abuse
• Headers: Returns rate limit info in standard headers

• Limit: 10 requests per 15 minutes per IP
• Purpose: Prevents brute force attacks on auth endpoints
• Skip Success: Only failed attempts count toward limit

• Limit: 20 matches per hour per IP
• Purpose: Prevents match spam and resource exhaustion

• Limit: 30 messages per minute per IP
• Purpose: Prevents message spam and chat abuse

• Limit: 60 searches per minute per IP
• Purpose: Protects resource-intensive search operations

• Delay After: 50 requests without delay
• Progressive Delay: 500ms per request after threshold
• Maximum Delay: 10 seconds
• Window: 15 minutes

• Emergency Rate Limit: 100 requests per minute
• Attack Detection: Logs suspicious activity
• Automatic Blocking: Temporary IP blocking for excessive requests

• Content Security Policy: Prevents XSS attacks
• HSTS: Enforces HTTPS connections
• X-Frame-Options: Prevents clickjacking
• X-Content-Type-Options: Prevents MIME type sniffing

• Origin Whitelist: Only allowed origins can access API
• Credentials: Supports authenticated requests
• Methods: Limited to necessary HTTP methods
• Headers: Restricted to required headers

• Size Limits: 10MB maximum request body size
• JSON Limits: Prevents JSON bomb attacks
• Trust Proxy: Proper IP detection behind reverse proxies

const bruteForceProtection = createBruteForceProtection();

// Usage example
const result = bruteForceProtection(userEmail, 5, 15 * 60 * 1000);
if (result.blocked) {
  // Handle blocked user
}

const adminIPs = process.env.ADMIN_IP_WHITELIST?.split(',') || [];
router.use('/admin', ipWhitelist(adminIPs));

• Activated during suspected attacks
• 10 requests per minute limit
• Logs all emergency activations

• Error Logging: All security events logged with context
• IP Tracking: Suspicious IP addresses tracked
• Attack Detection: Automatic logging of potential attacks
• Health Monitoring: Security status in health checks

• Safe Error Messages: No internal information leaked
• Stack Traces: Only in development environment
• Consistent Responses: Standardized error format
• Security Headers: Added to all error responses

# Required security configuration
SUPABASE_URL=your_supabase_url
SUPABASE_ANON_KEY=your_anon_key
SUPABASE_SERVICE_ROLE_KEY=your_service_key

# CORS and origins
ALLOWED_ORIGINS=https://yourdomain.com,https://app.yourdomain.com

# Admin security
ADMIN_IP_WHITELIST=123.456.789.0,987.654.321.0

# Environment
NODE_ENV=production

1. Environment Variables: Set all required environment variables
2. HTTPS Only: Force HTTPS in production
3. Rate Limits: Adjust rate limits based on expected traffic
4. Monitoring: Set up logging and monitoring
5. IP Whitelisting: Configure admin IP restrictions

• Row Level Security: Enabled on all tables
• Policies: Granular access control policies
• Service Role: Used only for admin operations
• Anon Key: Used for public operations only

# Test general rate limit
for i in {1..1010}; do curl -s http://localhost:3000/health; done

# Test auth rate limit
for i in {1..15}; do curl -s -X POST http://localhost:3000/api/auth/signin; done

# Test protected endpoint without token
curl -X GET http://localhost:3000/api/profiles/123

# Test with invalid token
curl -X GET -H "Authorization: Bearer invalid" http://localhost:3000/api/profiles/123

• Memory Usage: In-memory store for rate limits
• CPU Impact: Minimal per-request processing
• Network: Additional headers in responses

• Redis Integration: For distributed rate limiting (future)
• Database Connection Pooling: Efficient database usage
• Caching: JWT verification caching (implemented by Supabase)

• Environment variables configured
• HTTPS enforced
• Rate limits appropriate for traffic
• CORS origins restricted to production domains
• Admin IP whitelist configured
• Monitoring and logging enabled
• Error messages sanitized for production

• All sensitive endpoints protected with authentication
• Resource ownership verified
• Input validation implemented
• SQL injection prevention (via Supabase)
• XSS prevention (via Helmet)
• Rate limiting on all public endpoints

This security implementation provides enterprise-level protection while maintaining good performance and developer experience.