webapp-auth-jwt-signing-verify
Webapp Auth Jwt Signing Verify.
- License 许可
- MIT
- 最近更新
- 2026-09-01
- Stars
- ★ 0
- Forks
- 0
01 前言 Front Matter
- name
- webapp-auth-jwt-signing-verify
- domain
- cybersecurity
- description
- Webapp Auth Jwt Signing Verify.
02 资源文件 1
- 参考文档index.json520 B
03 SKILL.md 正文
| | HS256 | Symmetric (HMAC) | Shared secret | 128-bit | | RS256 | Asymmetric (RSA) | RSA key pair | 112-bit | | ES256 | Asymmetric (ECDSA) | P-256 key pair | 128-bit | | EdDSA | Asymmetric (Ed25519) | Ed25519 pair | 128-bit |
Common JWT Attacks
- Algorithm confusion: Switching from RS256 to HS256, using public key as HMAC secret
- None algorithm: Setting alg=none to bypass signature verification
- Key injection: Embedding key in JWK header
- Weak secrets: Brute-forcing short HMAC secrets
- Token replay: Reusing valid tokens without expiration
Security Considerations
- Always validate the algorithm header against an allowlist
- Never accept alg=none in production
- Use asymmetric algorithms (RS256, ES256) for distributed systems
- Set short expiration times (15 min for access tokens)
- Implement token refresh mechanism
- Store secrets securely (not in source code)
Validation Criteria
- [ ] JWT signing produces valid tokens for all algorithms
- [ ] Signature verification rejects tampered tokens
- [ ] Expired tokens are rejected
- [ ] Algorithm confusion attack is prevented
- [ ] None algorithm is rejected
- [ ] JWK key rotation works correctly
- [ ] Claims validation enforces all required claims
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