/*
 * Copyright 2004-present 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.
 */

package org.springframework.security.kerberos.docs;

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.kerberos.authentication.KerberosAuthenticationProvider;
import org.springframework.security.kerberos.authentication.KerberosServiceAuthenticationProvider;
import org.springframework.security.kerberos.authentication.sun.SunJaasKerberosClient;
import org.springframework.security.kerberos.authentication.sun.SunJaasKerberosTicketValidator;
import org.springframework.security.kerberos.web.authentication.SpnegoAuthenticationProcessingFilter;
import org.springframework.security.kerberos.web.authentication.SpnegoEntryPoint;

//tag::snippetA[]
@Configuration
public class SpnegoConfig {

	@Bean
	public KerberosAuthenticationProvider kerberosAuthenticationProvider() {
		KerberosAuthenticationProvider provider = new KerberosAuthenticationProvider();
		SunJaasKerberosClient client = new SunJaasKerberosClient();
		client.setDebug(true);
		provider.setKerberosClient(client);
		provider.setUserDetailsService(dummyUserDetailsService());
		return provider;
	}

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

	@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("HTTP/servicehost.example.org@EXAMPLE.ORG");
		ticketValidator.setKeyTabLocation(new FileSystemResource("/tmp/service.keytab"));
		ticketValidator.setDebug(true);
		return ticketValidator;
	}

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

}
// end::snippetA[]
