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Component Diagram: API Backend — Security & AuthenticationComponent Diagram: API Backend — Security & AuthenticationAPI Backend (Spring Boot)[system]«component»Security Filter Chain[Spring Security] Enforces authentication onall requests. Parses BasicAuth header and constructsan Authentication token;delegates credentialvalidation toDaoAuthenticationProvidervia BCrypt. Permitspassword-reset, invite, andregister endpoints withoutauthentication.«component»PermissionAspect[Spring AOP] Intercepts methodsannotated with@RequirePermission.Checks user's grantedauthorities against therequired permission. Throws401/403 if denied.«component»SecurityConfig[Spring @Configuration] Configures filter chain: allroutes requireauthentication, CSRFdisabled, BCrypt passwordencoder,DaoAuthenticationProviderwithCustomUserDetailsService.«component»CustomUserDetailsService[Spring SecurityUserDetailsService] Loads AppUser by emailfrom DB. Converts grouppermissions to SpringGrantedAuthority objects.Logs unknown permissions.«container»Web Frontend[SvelteKit]«container»PostgreSQL[PostgreSQL 16]All requests[HTTP / Basic Authheader]Authenticatedrequests reachguarded servicemethodsWires asUserDetailsServiceLoads user by email[JDBC]
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