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Spring Boot Security

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Spring Security 6+ standards, Lambda DSL, and Hardening

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Source SKILL.md: https://github.com/majiayu000/claude-skill-registry/blob/HEAD/skills/security/security-hoangnguyen0403-agent-skills-standar-9/SKILL.md

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Spring Boot Security Standards

Priority: P0 (CRITICAL)

Implementation Guidelines

Configuration (Spring Security 6+)

  • Lambda DSL: ALWAYS use Lambda DSL.
  • SecurityFilterChain: Expose as @Bean. Do not extend WebSecurityConfigurerAdapter.
  • Statelessness: Enforce SessionCreationPolicy.STATELESS for REST APIs.

Golden Snippet

See Security Configuration for full SecurityFilterChain example.

Authentication vs Authorization

  • Authentication: Validation of credentials (Who are you?). Use AuthenticationManager or JwtDecoder.
  • Authorization: Verification of access rights (Can you do this?). Use @PreAuthorize.

JWT Best Practices

  • Algorithm: Enforce RS256 or HS256. Reject none algorithm.
  • Claims: Validate iss, aud, and exp.
  • Tokens: Short-lived access tokens (15m), secure refresh tokens (httpOnly cookie).

Hardening Checklist

  • CSRF: Disabled for pure APIs? Enabled + Cookie for Browser Apps?
  • CORS: Specific origins permitted? No * with credentials?
  • Headers: HSTS, Content-Type-Options, X-Frame-Options enabled?
  • Secrets: No hardcoded keys? Loaded from Vault/Env?
  • Rate Limiting: Applied on login/expensive endpoints?
  • Dependencies: Scanned for CVEs?

Anti-Patterns

  • Adapter Extension: **No Adapter**: Use SecurityFilterChain bean.
  • Chained Calls: **No .and()**: Use Lambda DSL.
  • Hardcoded Secrets: **No Secrets**: Use Vault/Env.
  • Legacy Matchers: **No antMatchers**: Use requestMatchers.

References

Related Topics

common/security-standards | architecture