/*
 * Copyright 2012-2017 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.boot.autoconfigure.security;

import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
import org.springframework.context.ApplicationEventPublisher;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Import;
import org.springframework.security.authentication.AuthenticationEventPublisher;
import org.springframework.security.authentication.AuthenticationManager;
import org.springframework.security.authentication.DefaultAuthenticationEventPublisher;
import org.springframework.security.config.annotation.authentication.configurers.GlobalAuthenticationConfigurerAdapter;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;

/**
 * {@link EnableAutoConfiguration Auto-configuration} for Spring Security. Provides an
 * {@link AuthenticationManager} based on configuration bound to a
 * {@link SecurityProperties} bean. There is one user (named "user") whose password is
 * random and printed on the console at INFO level during startup. In a webapp this
 * configuration also secures all web endpoints (except some well-known static resource
 * locations) with HTTP basic security. To replace all the default behaviours in a webapp
 * provide a {@code @Configuration} with {@code @EnableWebSecurity}. To just add your own
 * layer of application security in front of the defaults, add a {@code @Configuration} of
 * type {@link WebSecurityConfigurerAdapter}.
 *
 * @author Dave Syer
 * @author Andy Wilkinson
 */
@Configuration
@ConditionalOnClass({ AuthenticationManager.class,
		GlobalAuthenticationConfigurerAdapter.class })
@EnableConfigurationProperties(SecurityProperties.class)
@Import({ SpringBootWebSecurityConfiguration.class,
		AuthenticationManagerConfiguration.class,
		BootGlobalAuthenticationConfiguration.class, SecurityDataConfiguration.class })
public class SecurityAutoConfiguration {

	@Bean
	@ConditionalOnMissingBean(AuthenticationEventPublisher.class)
	public DefaultAuthenticationEventPublisher authenticationEventPublisher(
			ApplicationEventPublisher publisher) {
		return new DefaultAuthenticationEventPublisher(publisher);
	}

}
