Security Improvements for GitHub Integration

[IgorShadurin]

Security Analysis Report

The following security improvements have been implemented for the GitHub integration:

1. CSRF Protection

   • Added CSRF protection to GitHub OAuth flow using state parameter
   • State is validated when returning from GitHub to prevent CSRF attacks

2. Token Security

   • Implemented AES-256-GCM encryption for storing GitHub tokens
   • Added ENCRYPTION_KEY environment variable for secure key storage

3. Token Revocation

   • Added GitHub token revocation when disconnecting accounts
   • Ensures tokens cannot be used after disconnection

4. Rate Limiting

   • Implemented rate limiting on GitHub API endpoints
   • Prevents abuse and brute force attacks

5. Mobile Responsiveness

   • Improved GitHub connection UI for mobile devices
   • Added responsive button styling and text wrapping

Required Configuration

For proper security, make sure to:

1. Generate a strong random 32-character ENCRYPTION_KEY in backend/.env
2. Ensure GitHub OAuth correctly uses the state parameter
3. Properly validate all OAuth-related input parameters