Siteminder Security Example

HomeController.java

/*
 * Copyright 2002-2021 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import org.springframework.security.core.annotation.AuthenticationPrincipal;
import org.springframework.security.core.userdetails.User;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

import java.util.Map;

@RestController
public class HomeController {
    @GetMapping("/")
    public Map<String, String> home(@AuthenticationPrincipal User user) {
        return Map.of("message", "You are logged in, " + user.getUsername() + "!");
    }
}

SecurityConfiguration.java

/*
 * Copyright 2002-2021 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import org.springframework.context.annotation.Bean;
import org.springframework.security.authentication.AuthenticationProvider;
import org.springframework.security.authentication.ProviderManager;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
import org.springframework.security.core.userdetails.User;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.security.core.userdetails.UserDetailsByNameServiceWrapper;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.provisioning.InMemoryUserDetailsManager;
import org.springframework.security.web.SecurityFilterChain;
import org.springframework.security.web.authentication.preauth.PreAuthenticatedAuthenticationProvider;
import org.springframework.security.web.authentication.preauth.RequestHeaderAuthenticationFilter;

/**
 * @author Steve Riesenberg
 */
@EnableWebSecurity
public class SecurityConfiguration {

    @Bean
    public SecurityFilterChain securityFilterChain(HttpSecurity http) throws Exception {
        // @formatter:off
        http
            .authorizeHttpRequests(authorize -> authorize
                .anyRequest().authenticated()
            )
            .addFilterAfter(siteminderFilter(), RequestHeaderAuthenticationFilter.class);
        // @formatter:on

        return http.build();
    }

    private RequestHeaderAuthenticationFilter siteminderFilter() {
        RequestHeaderAuthenticationFilter authenticationFilter = new RequestHeaderAuthenticationFilter();
        authenticationFilter.setPrincipalRequestHeader("SM_USER");
        authenticationFilter.setExceptionIfHeaderMissing(false);
        authenticationFilter.setAuthenticationManager(new ProviderManager(siteminderProvider()));

        return authenticationFilter;
    }

    private AuthenticationProvider siteminderProvider() {
        PreAuthenticatedAuthenticationProvider authenticationProvider = new PreAuthenticatedAuthenticationProvider();
        authenticationProvider.setPreAuthenticatedUserDetailsService(new UserDetailsByNameServiceWrapper<>(userDetailsService()));

        return authenticationProvider;
    }

    private UserDetailsService userDetailsService() {
        // @formatter:off
        UserDetails userDetails = User.withDefaultPasswordEncoder()
                .username("user")
                .password("password")
                .roles("USER")
                .build();
        // @formatter:on

        return new InMemoryUserDetailsManager(userDetails);
    }

}