springboot-security

# Spring Boot Security Review Use when adding auth, handling input, creating endpoints, or dealing with secrets. ## When to Activate - Adding authentication (JWT, OAuth2, session-based) - Implementing authorization (@PreAuthorize, role-based access) - Validating user input (Bean Validation, custom validators) - Configuring CORS, CSRF, or security headers - Managing secrets (Vault, environment variables) - Adding rate limiting or brute-force protection - Scanning dependencies for CVEs ## Authentication - Prefer stateless JWT or opaque tokens with revocation list - Use `httpOnly`, `Secure`, `SameSite=Strict` cookies for sessions - Validate tokens with `OncePerRequestFilter` or resource server ```java @Component public class JwtAuthFilter extends OncePerRequestFilter { private final JwtService jwtService; public JwtAuthFilter(JwtService jwtService) { this.jwtService = jwtService; } @Override protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain chain) throws ServletException, IOException { String header = request.getHeader(HttpHeaders.AUTHORIZATION); if (header != null && header.startsWith("Bearer ")) { String token = header.substring(7); Authentication auth = jwtService.authenticate(token); SecurityContextHolder.getContext().setAuthentication(auth); } chain.doFilter(request, response); } } ``` ## Authorization - Enable method security: `@EnableMethodSecurity` - Use ...