auth-audit

name	auth-audit
description	Audit authentication and authorization patterns. Checks JWT, sessions, OAuth2, PKCE implementations for security best practices and common vulnerabilities.
argument-hint	[--jwt] [--session] [--oauth]
user-invocable	true

Auth Audit Skill

Overview

Comprehensive audit of authentication and authorization implementations.

Audit Categories

Category	Checks
JWT	Signing algo, expiration, refresh, storage
Sessions	Storage, expiry, regeneration, fixation
OAuth2	PKCE, state param, redirect validation
Passwords	Hashing algo, strength rules, reset flow
MFA	Implementation, backup codes, recovery

Workflow

1. Detect auth implementation (JWT, sessions, OAuth)
2. Scan for known anti-patterns
3. Verify cryptographic choices
4. Check token/session lifecycle
5. Audit authorization logic (RBAC, ABAC)

Common Vulnerabilities

• JWT signed with none algorithm
• JWT secret too short (< 256 bits)
• No token expiration or too long
• Refresh tokens stored in localStorage
• Session fixation after login
• Missing CSRF protection
• OAuth without PKCE for public clients
• Missing state parameter in OAuth flow

References

• Auth Patterns
• Auth Checklist