WebSecurityConfig.java

/*
 * Copyright 2015 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
 *
 * http://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.
 */
package org.springframework.security.kerberos.client;

import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.io.FileSystemResource;
import org.springframework.security.authentication.AuthenticationManager;
import org.springframework.security.config.annotation.authentication.builders.AuthenticationManagerBuilder;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
import org.springframework.security.config.annotation.web.servlet.configuration.EnableWebMvcSecurity;
import org.springframework.security.core.authority.AuthorityUtils;
import org.springframework.security.core.userdetails.User;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.core.userdetails.UsernameNotFoundException;
import org.springframework.security.kerberos.authentication.KerberosServiceAuthenticationProvider;
import org.springframework.security.kerberos.authentication.sun.SunJaasKerberosTicketValidator;
import org.springframework.security.kerberos.web.authentication.SpnegoAuthenticationProcessingFilter;
import org.springframework.security.kerberos.web.authentication.SpnegoEntryPoint;
import org.springframework.security.web.authentication.www.BasicAuthenticationFilter;

@Configuration
@EnableWebMvcSecurity
public class WebSecurityConfig extends WebSecurityConfigurerAdapter {

	@Value("${serverPrincipal}")
	private String serverPrincipal;

	@Value("${serverKeytab}")
	private String serverKeytab;

    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http
        	.exceptionHandling().authenticationEntryPoint(spnegoEntryPoint()).and()
            .authorizeRequests()
                .antMatchers("/", "/home").permitAll()
                .antMatchers("/hello").access("hasRole('ROLE_USER')")
                .anyRequest().authenticated()
                .and()

            .addFilterBefore(spnegoAuthenticationProcessingFilter(authenticationManagerBean()), BasicAuthenticationFilter.class);
    }

    @Override
    protected void configure(AuthenticationManagerBuilder auth) throws Exception {
    	auth.authenticationProvider(kerberosServiceAuthenticationProvider());
    }

	@Bean
	public SpnegoEntryPoint spnegoEntryPoint() {
		return new SpnegoEntryPoint();
	}

	@Bean
	public SpnegoAuthenticationProcessingFilter spnegoAuthenticationProcessingFilter(
			AuthenticationManager authenticationManager) {
		SpnegoAuthenticationProcessingFilter filter = new SpnegoAuthenticationProcessingFilter();
		filter.setAuthenticationManager(authenticationManager);
		return filter;
	}

	@Bean
	public KerberosServiceAuthenticationProvider kerberosServiceAuthenticationProvider() {
		KerberosServiceAuthenticationProvider provider = new KerberosServiceAuthenticationProvider();
		provider.setTicketValidator(sunJaasKerberosTicketValidator());
		provider.setUserDetailsService(dummyUserDetailsService());
		return provider;
	}

	@Bean
	public SunJaasKerberosTicketValidator sunJaasKerberosTicketValidator() {
		SunJaasKerberosTicketValidator ticketValidator = new SunJaasKerberosTicketValidator();
		ticketValidator.setServicePrincipal(serverPrincipal);
		ticketValidator.setKeyTabLocation(new FileSystemResource(serverKeytab));
		ticketValidator.setDebug(true);
		return ticketValidator;
	}

	@Bean
	public DummyUserDetailsService dummyUserDetailsService() {
		return new DummyUserDetailsService();
	}

	static class DummyUserDetailsService implements UserDetailsService {

		public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException {
			return new User(username, "notUsed", true, true, true, true,
					AuthorityUtils.createAuthorityList("ROLE_USER"));
		}

	}

}