/*
* Copyright 2002-2013 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.config.annotation.web.configurers;
import java.util.Arrays;
import java.util.Collection;
import java.util.LinkedHashMap;
import java.util.List;
import org.springframework.security.access.ConfigAttribute;
import org.springframework.security.access.SecurityConfig;
import org.springframework.security.config.annotation.web.HttpSecurityBuilder;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.web.DefaultSecurityFilterChain;
import org.springframework.security.web.PortMapper;
import org.springframework.security.web.access.channel.ChannelDecisionManagerImpl;
import org.springframework.security.web.access.channel.ChannelProcessingFilter;
import org.springframework.security.web.access.channel.ChannelProcessor;
import org.springframework.security.web.access.channel.InsecureChannelProcessor;
import org.springframework.security.web.access.channel.RetryWithHttpEntryPoint;
import org.springframework.security.web.access.channel.RetryWithHttpsEntryPoint;
import org.springframework.security.web.access.channel.SecureChannelProcessor;
import org.springframework.security.web.access.intercept.DefaultFilterInvocationSecurityMetadataSource;
import org.springframework.security.web.util.RequestMatcher;
/**
* Adds channel security (i.e. requires HTTPS or HTTP) to an application. In order for
* {@link ChannelSecurityConfigurer} to be useful, at least one {@link RequestMatcher} should be mapped to HTTP
* or HTTPS.
*
* <p>
* By default an {@link InsecureChannelProcessor} and a {@link SecureChannelProcessor} will be registered.
* </p>
*
* <h2>Security Filters</h2>
*
* The following Filters are populated
*
* <ul>
* <li>{@link ChannelProcessingFilter}</li>
* </ul>
*
* <h2>Shared Objects Created</h2>
*
* No shared objects are created.
*
* <h2>Shared Objects Used</h2>
*
* The following shared objects are used:
*
* <ul>
* <li>{@link PortMapper} is used to create the default {@link ChannelProcessor} instances</li>
* </ul>
*
* @param <H> the type of {@link HttpSecurityBuilder} that is being configured
*
* @author Rob Winch
* @since 3.2
*/
public final class ChannelSecurityConfigurer<H extends HttpSecurityBuilder<H>> extends
AbstractRequestMatcherMappingConfigurer<H,ChannelSecurityConfigurer<H>.RequiresChannelUrl,DefaultSecurityFilterChain> {
private ChannelProcessingFilter channelFilter = new ChannelProcessingFilter();
private LinkedHashMap<RequestMatcher,Collection<ConfigAttribute>> requestMap = new LinkedHashMap<RequestMatcher,Collection<ConfigAttribute>>();
private List<ChannelProcessor> channelProcessors;
/**
* Creates a new instance
* @see HttpSecurity#requiresChannel()
*/
public ChannelSecurityConfigurer() {
}
@Override
public void configure(H http) throws Exception {
ChannelDecisionManagerImpl channelDecisionManager = new ChannelDecisionManagerImpl();
channelDecisionManager.setChannelProcessors(getChannelProcessors(http));
channelDecisionManager = postProcess(channelDecisionManager);
channelFilter.setChannelDecisionManager(channelDecisionManager);
DefaultFilterInvocationSecurityMetadataSource filterInvocationSecurityMetadataSource =
new DefaultFilterInvocationSecurityMetadataSource(requestMap);
channelFilter.setSecurityMetadataSource(filterInvocationSecurityMetadataSource);
channelFilter = postProcess(channelFilter);
http.addFilter(channelFilter);
}
/**
* Sets the {@link ChannelProcessor} instances to use in {@link ChannelDecisionManagerImpl}
* @param channelProcessors
* @return
*/
public ChannelSecurityConfigurer<H> channelProcessors(List<ChannelProcessor> channelProcessors) {
this.channelProcessors = channelProcessors;
return this;
}
private List<ChannelProcessor> getChannelProcessors(H http) {
if(channelProcessors != null) {
return channelProcessors;
}
InsecureChannelProcessor insecureChannelProcessor = new InsecureChannelProcessor();
SecureChannelProcessor secureChannelProcessor = new SecureChannelProcessor();
PortMapper portMapper = http.getSharedObject(PortMapper.class);
if(portMapper != null) {
RetryWithHttpEntryPoint httpEntryPoint = new RetryWithHttpEntryPoint();
httpEntryPoint.setPortMapper(portMapper);
insecureChannelProcessor.setEntryPoint(httpEntryPoint);
RetryWithHttpsEntryPoint httpsEntryPoint = new RetryWithHttpsEntryPoint();
httpsEntryPoint.setPortMapper(portMapper);
secureChannelProcessor.setEntryPoint(httpsEntryPoint);
}
insecureChannelProcessor = postProcess(insecureChannelProcessor);
secureChannelProcessor = postProcess(secureChannelProcessor);
return Arrays.<ChannelProcessor>asList(insecureChannelProcessor, secureChannelProcessor);
}
private ChannelSecurityConfigurer<H> addAttribute(String attribute, List<RequestMatcher> matchers) {
for(RequestMatcher matcher : matchers) {
Collection<ConfigAttribute> attrs = Arrays.<ConfigAttribute>asList(new SecurityConfig(attribute));
requestMap.put(matcher, attrs);
}
return this;
}
@Override
protected RequiresChannelUrl chainRequestMatchersInternal(List<RequestMatcher> requestMatchers) {
return new RequiresChannelUrl(requestMatchers);
}
public final class RequiresChannelUrl {
private List<RequestMatcher> requestMatchers;
private RequiresChannelUrl(List<RequestMatcher> requestMatchers) {
this.requestMatchers = requestMatchers;
}
public ChannelSecurityConfigurer<H> requiresSecure() {
return requires("REQUIRES_SECURE_CHANNEL");
}
public ChannelSecurityConfigurer<H> requiresInsecure() {
return requires("REQUIRES_INSECURE_CHANNEL");
}
public ChannelSecurityConfigurer<H> requires(String attribute) {
return addAttribute(attribute, requestMatchers);
}
}
}