SecurityConfig.java

package ftn.security.minikms.config;

import ftn.security.minikms.service.auth.JwtAuthenticationFilter;
import ftn.security.minikms.service.auth.MiniKmsUserDetailsService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.HttpMethod;
import org.springframework.security.authentication.AuthenticationManager;
import org.springframework.security.config.Customizer;
import org.springframework.security.config.annotation.authentication.configuration.AuthenticationConfiguration;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
import org.springframework.security.config.annotation.web.configurers.AbstractHttpConfigurer;
import org.springframework.security.config.http.SessionCreationPolicy;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
import org.springframework.security.crypto.password.PasswordEncoder;
import org.springframework.security.web.SecurityFilterChain;
import org.springframework.security.web.authentication.UsernamePasswordAuthenticationFilter;
import org.springframework.web.cors.CorsConfiguration;
import org.springframework.web.cors.CorsConfigurationSource;
import org.springframework.web.cors.UrlBasedCorsConfigurationSource;

import java.util.List;

@Configuration
@EnableWebSecurity
public class SecurityConfig {
    private final String jwtSecret;
    private final MiniKmsUserDetailsService service;

    @Autowired
    public SecurityConfig(
            @Value("${jwt.secret}") String jwtSecret,
            MiniKmsUserDetailsService service) {
        this.jwtSecret = jwtSecret;
        this.service = service;
    }

    @Bean
    public SecurityFilterChain filterChain(HttpSecurity http) throws Exception {
        return http
                // Stateless, token-only API: no cookies => CSRF not applicable
                .csrf(AbstractHttpConfigurer::disable)
                .sessionManagement(sm -> sm.sessionCreationPolicy(SessionCreationPolicy.STATELESS))
                .cors(Customizer.withDefaults())

                .formLogin(AbstractHttpConfigurer::disable)
                .httpBasic(AbstractHttpConfigurer::disable)
                .logout(AbstractHttpConfigurer::disable)

                .authorizeHttpRequests(auth -> auth
                        .requestMatchers(HttpMethod.OPTIONS, "/**").permitAll()
                        .requestMatchers("/api/v1/auth/**").permitAll()
                        .requestMatchers("/api/v1/test/**").permitAll()
                        .requestMatchers(HttpMethod.GET, "/api/v1/keys/**").authenticated() // Allow all roles to GET
                        .requestMatchers("/api/v1/keys/**").hasRole("MANAGER")
                        .anyRequest().authenticated()
                )

                .userDetailsService(service)
                .addFilterBefore(new JwtAuthenticationFilter(
                        jwtSecret,
                        service
                ), UsernamePasswordAuthenticationFilter.class)
                .build();
    }

    @Bean
    public PasswordEncoder passwordEncoder() {
        return new BCryptPasswordEncoder();
    }

    @Bean
    public AuthenticationManager authenticationManager(AuthenticationConfiguration configuration) throws Exception {
        return configuration.getAuthenticationManager();
    }

    @Bean
    public CorsConfigurationSource corsConfigurationSource() {
        var config = new CorsConfiguration();
        config.setAllowedOrigins(List.of("http://localhost:4200", "http://localhost"));
        config.setAllowedMethods(List.of("GET", "POST", "PUT", "DELETE", "OPTIONS"));
        config.setAllowedHeaders(List.of("*"));
        config.setAllowCredentials(false);

        var source = new UrlBasedCorsConfigurationSource();
        source.registerCorsConfiguration("/**", config);
        return source;
    }
}