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auth-implementation-patterns

Plan and implement user login and access permissions using sessions, JWT tokens, or OAuth2. Apply role-based permissions, protect APIs, and review common weaknesses in password handling, cookies, token expiration, and server-side checks.

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Master authentication and authorization patterns including JWT, OAuth2, session management, and RBAC to build secure, scalable access control systems. Use when implementing auth systems, securing APIs, or debugging security issues.

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适用场景

  • Implementing user login and logout
  • Adding social login or enterprise SSO
  • Controlling access by user role
  • Investigating API authentication and permission issues

包含的文件(2)

  • SKILL.md2.6 KB
  • references/details.md13.3 KB

SKILL.md(原文)

安装前可以查看交给 AI 代理的指令内容。

Authentication & Authorization Implementation Patterns

Build secure, scalable authentication and authorization systems using industry-standard patterns and modern best practices.

When to Use This Skill

  • Implementing user authentication systems
  • Securing REST or GraphQL APIs
  • Adding OAuth2/social login
  • Implementing role-based access control (RBAC)
  • Designing session management
  • Migrating authentication systems
  • Debugging auth issues
  • Implementing SSO or multi-tenancy

Core Concepts

1. Authentication vs Authorization

Authentication (AuthN): Who are you?

  • Verifying identity (username/password, OAuth, biometrics)
  • Issuing credentials (sessions, tokens)
  • Managing login/logout

Authorization (AuthZ): What can you do?

  • Permission checking
  • Role-based access control (RBAC)
  • Resource ownership validation
  • Policy enforcement

2. Authentication Strategies

Session-Based:

  • Server stores session state
  • Session ID in cookie
  • Traditional, simple, stateful

Token-Based (JWT):

  • Stateless, self-contained
  • Scales horizontally
  • Can store claims

OAuth2/OpenID Connect:

  • Delegate authentication
  • Social login (Google, GitHub)
  • Enterprise SSO

Detailed patterns and worked examples

Detailed pattern documentation lives in references/details.md. Read that file when the navigation tier above is insufficient.

Best Practices

  1. Never Store Plain Passwords: Always hash with bcrypt/argon2
  2. Use HTTPS: Encrypt data in transit
  3. Short-Lived Access Tokens: 15-30 minutes max
  4. Secure Cookies: httpOnly, secure, sameSite flags
  5. Validate All Input: Email format, password strength
  6. Rate Limit Auth Endpoints: Prevent brute force attacks
  7. Implement CSRF Protection: For session-based auth
  8. Rotate Secrets Regularly: JWT secrets, session secrets
  9. Log Security Events: Login attempts, failed auth
  10. Use MFA When Possible: Extra security layer

Common Pitfalls

  • Weak Passwords: Enforce strong password policies
  • JWT in localStorage: Vulnerable to XSS, use httpOnly cookies
  • No Token Expiration: Tokens should expire
  • Client-Side Auth Checks Only: Always validate server-side
  • Insecure Password Reset: Use secure tokens with expiration
  • No Rate Limiting: Vulnerable to brute force
  • Trusting Client Data: Always validate on server

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