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77 lines
2.2 KiB
Plaintext
77 lines
2.2 KiB
Plaintext
# Session: Auth Feature Implementation
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**Date:** 2026-01-20
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**Started:** 14:30
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**Last Updated:** 17:45
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---
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## Current State
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Working on JWT authentication flow for the API. Main goal is replacing session-based auth with stateless tokens.
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### Completed
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- [x] Set up JWT signing with RS256
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- [x] Created `/auth/login` endpoint
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- [x] Added refresh token rotation
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- [x] Fixed token expiry bug (was using seconds, needed milliseconds)
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### In Progress
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- [ ] Add rate limiting to auth endpoints
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- [ ] Implement token blacklist for logout
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### Blockers Encountered
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1. **jsonwebtoken version mismatch** - v9.x changed the `verify()` signature, had to update error handling
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2. **Redis TTL for refresh tokens** - Was setting TTL in seconds but passing milliseconds
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### Key Decisions Made
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- Using RS256 over HS256 for better security with distributed services
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- Storing refresh tokens in Redis with 7-day TTL
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- Access tokens expire in 15 minutes
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### Code Locations Modified
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- `src/middleware/auth.js` - JWT verification middleware
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- `src/routes/auth.js` - Login/logout/refresh endpoints
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- `src/services/token.service.js` - Token generation and validation
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### Notes for Next Session
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- Need to add CSRF protection for cookie-based token storage
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- Consider adding fingerprinting for refresh token binding
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- Review rate limit values with team
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### Context to Load
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```
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src/middleware/
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src/routes/auth.js
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src/services/token.service.js
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```
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---
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## Session Log
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**14:30** - Started session, goal is JWT implementation
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**14:45** - Set up basic JWT signing. Using RS256 with key pair stored in env vars.
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**15:20** - Login endpoint working. Discovered jsonwebtoken v9 breaking change - `verify()` now throws different error types. Updated catch block:
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```javascript
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// Old (v8)
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if (err.name === 'TokenExpiredError') { ... }
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// New (v9)
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if (err instanceof jwt.TokenExpiredError) { ... }
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```
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**16:00** - Refresh token rotation working but tokens expiring immediately. Bug: was passing `Date.now()` (milliseconds) to `expiresIn` which expects seconds. Fixed:
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```javascript
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// Wrong
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expiresIn: Date.now() + 900000
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// Correct
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expiresIn: '15m'
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```
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**17:30** - Auth flow complete. Login -> access token -> refresh -> new tokens. Ready for rate limiting tomorrow.
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**17:45** - Saving session state.
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