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Issue #121 Completion Checklist

Issue Details

  • Title: Add API Key Rotation Support
  • Description: Introduce a mechanism to rotate API keys without downtime, improving long-term security

Tasks Completion

✅ Design key versioning or expiry

  • Database schema with key lifecycle states (active, deprecated, revoked)
  • Expiration support with expires_at field
  • Automatic expiration checking during validation
  • Key versioning through multiple active keys
  • Metadata field for extensibility

Implementation: src/models/apiKeys.js - Complete key lifecycle management

✅ Update authentication logic

  • Updated middleware to support database-backed keys
  • Backward compatibility with legacy environment keys
  • Role-based access from database
  • Last usage tracking
  • Deprecation warnings in response headers
  • Integration with RBAC system

Implementation:

  • src/middleware/apiKeyMiddleware.js - Updated authentication
  • src/middleware/rbacMiddleware.js - Updated role attachment

✅ Document rotation process

  • Complete rotation guide with best practices
  • Quick start reference for common tasks
  • CLI tool documentation
  • API endpoint documentation
  • Migration guide from legacy keys
  • Troubleshooting guide
  • Security recommendations

Documentation:

  • docs/API_KEY_ROTATION.md - Complete guide
  • docs/API_KEY_ROTATION_QUICK_START.md - Quick reference
  • docs/MIGRATION_TO_DATABASE_KEYS.md - Migration guide
  • README.md - Updated with feature description

Acceptance Criteria

✅ Old keys can be deprecated safely

Status: PASSED

Evidence:

  • Keys can be marked as deprecated while remaining functional
  • deprecateApiKey() function changes status without invalidating key
  • Deprecated keys return HTTP 200 with warning headers
  • Clients receive X-API-Key-Deprecated: true header
  • Warning header: 299 - "API key is deprecated and will be revoked soon"
  • Grace period allows gradual client migration

Test Coverage:

// tests/apiKeys.test.js
it('should warn when using deprecated key')
it('should return warning headers when using deprecated key')

Usage:

npm run keys -- deprecate --id 1
# Key still works but clients are warned

✅ No service disruption

Status: PASSED

Evidence:

  • Multiple keys can be active simultaneously
  • New keys created while old keys remain active
  • Backward compatible with legacy API_KEYS environment variable
  • Middleware checks database first, then falls back to legacy
  • Zero downtime during rotation process
  • Gradual rollout supported

Rotation Process:

  1. Create new key (old key still active)
  2. Deploy new key to clients gradually
  3. Deprecate old key (still works, warns clients)
  4. Monitor usage during grace period
  5. Revoke old key after migration complete

Test Coverage:

// tests/apiKeys.test.js
it('should authenticate with valid database key')
it('should validate active key')
describe('Authentication Middleware')

Backward Compatibility:

  • Legacy keys in API_KEYS continue to work
  • Database keys and legacy keys coexist
  • No breaking changes to existing API

Implementation Summary

Core Components Created

  1. Database Model (src/models/apiKeys.js)

    • Key creation with hashing
    • Validation with expiration checking
    • Lifecycle management (deprecate, revoke)
    • Listing with filters
    • Cleanup of old keys

  2. API Routes (src/routes/apiKeys.js)

    • POST /api-keys - Create key
    • GET /api-keys - List keys
    • POST /api-keys/:id/deprecate - Deprecate key
    • DELETE /api-keys/:id - Revoke key
    • POST /api-keys/cleanup - Clean up old keys

  3. CLI Tool (src/scripts/manageApiKeys.js)

    • create, list, deprecate, revoke, cleanup commands
    • Integrated with npm scripts
    • Help documentation

  4. Middleware Updates

    • src/middleware/apiKeyMiddleware.js - Database + legacy support
    • src/middleware/rbacMiddleware.js - Role from database

  5. Documentation

    • Complete rotation guide
    • Quick start reference
    • Migration guide
    • Updated README

  6. Tests (tests/apiKeys.test.js)

    • Key creation and validation
    • Deprecation and revocation
    • Authentication middleware
    • Role-based access
    • Edge cases

Database Schema

CREATE TABLE api_keys (
  id INTEGER PRIMARY KEY AUTOINCREMENT,
  key_hash TEXT NOT NULL UNIQUE,        -- SHA-256 hash
  key_prefix TEXT NOT NULL,             -- First 8 chars for identification
  name TEXT,                            -- Descriptive name
  role TEXT NOT NULL DEFAULT 'user',    -- admin, user, guest
  status TEXT NOT NULL DEFAULT 'active', -- active, deprecated, revoked
  created_at INTEGER NOT NULL,
  expires_at INTEGER,                   -- Optional expiration
  deprecated_at INTEGER,
  revoked_at INTEGER,
  last_used_at INTEGER,                 -- Usage tracking
  created_by TEXT,
  metadata TEXT                         -- JSON metadata
);

Security Features

  • Hashed storage: SHA-256 hashing of keys
  • One-time display: Plain text shown only at creation
  • Prefix identification: Only first 8 chars stored in plain text
  • Audit logging: All operations logged
  • Admin-only management: Key endpoints require admin role
  • Automatic expiration: Keys can expire automatically
  • Rate limiting: API endpoints are rate-limited

NPM Scripts Added

"keys": "node src/scripts/manageApiKeys.js",
"keys:create": "node src/scripts/manageApiKeys.js create",
"keys:list": "node src/scripts/manageApiKeys.js list",
"keys:help": "node src/scripts/manageApiKeys.js help"

Testing

Manual Testing Steps

  1. Create a key:

    npm run keys:create -- --name "Test Key" --role user --expires 365

  2. List keys:

    npm run keys:list

  3. Test authentication:

    curl http://localhost:3000/health -H "x-api-key: YOUR_KEY"

  4. Deprecate key:

    npm run keys -- deprecate --id 1
curl http://localhost:3000/health -H "x-api-key: YOUR_KEY" -v
# Should see X-API-Key-Deprecated header

  5. Revoke key:

    npm run keys -- revoke --id 1
curl http://localhost:3000/health -H "x-api-key: YOUR_KEY"
# Should return 401 Unauthorized

Automated Tests

Run test suite:

npm test tests/apiKeys.test.js

Test coverage includes:

  • Key creation with various parameters
  • Validation of active, deprecated, revoked, and expired keys
  • Authentication middleware behavior
  • Role-based access control
  • API endpoints (create, list, deprecate, revoke, cleanup)
  • Edge cases and error handling

Files Created

  • src/models/apiKeys.js - Core model
  • src/routes/apiKeys.js - API routes
  • src/scripts/manageApiKeys.js - CLI tool
  • docs/API_KEY_ROTATION.md - Complete guide
  • docs/API_KEY_ROTATION_QUICK_START.md - Quick reference
  • docs/MIGRATION_TO_DATABASE_KEYS.md - Migration guide
  • tests/apiKeys.test.js - Test suite
  • API_KEY_ROTATION_IMPLEMENTATION.md - Implementation summary
  • ISSUE_121_COMPLETION_CHECKLIST.md - This file

Files Modified

  • src/middleware/apiKeyMiddleware.js - Updated authentication
  • src/middleware/rbacMiddleware.js - Updated role attachment
  • src/routes/app.js - Added initialization and routes
  • package.json - Added npm scripts
  • .env.example - Documented new system
  • README.md - Added feature and documentation links

Deployment Checklist

  • Review all code changes
  • Run test suite
  • Test in development environment
  • Create initial admin key
  • Document admin key securely
  • Update deployment documentation
  • Deploy to staging
  • Test rotation process in staging
  • Deploy to production
  • Create production keys
  • Migrate clients from legacy keys
  • Monitor for issues
  • Schedule first rotation

Conclusion

✅ All tasks completed ✅ All acceptance criteria met ✅ Comprehensive documentation provided ✅ Test coverage implemented ✅ Backward compatibility maintained ✅ Zero-downtime rotation supported

Issue #121 is complete and ready for review.