/* * Copyright 2002-2011 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.flex.security3; import java.util.ArrayList; import java.util.List; import org.springframework.flex.core.MessageInterceptor; import org.springframework.flex.core.MessageProcessingContext; import org.springframework.security.access.AccessDecisionVoter; import org.springframework.security.access.SecurityMetadataSource; import org.springframework.security.access.intercept.AbstractSecurityInterceptor; import org.springframework.security.access.intercept.InterceptorStatusToken; import org.springframework.security.access.vote.AffirmativeBased; import org.springframework.security.access.vote.AuthenticatedVoter; import org.springframework.security.access.vote.RoleVoter; import flex.messaging.endpoints.AbstractEndpoint; import flex.messaging.messages.CommandMessage; import flex.messaging.messages.Message; /** * Security interceptor that secures messages being passed to BlazeDS endpoints based on the security attributes * configured for the endpoint being invoked. * * @author Jeremy Grelle */ public class EndpointInterceptor extends AbstractSecurityInterceptor implements MessageInterceptor { private static final String STATUS_TOKEN = "_enpointInterceptorStatusToken"; private EndpointSecurityMetadataSource securityMetadataSource; @Override public void afterPropertiesSet() throws Exception { if (getAccessDecisionManager() == null) { configureDefaultAccessDecisionManager(); } super.afterPropertiesSet(); } public EndpointSecurityMetadataSource getObjectDefinitionSource() { return this.securityMetadataSource; } /** * * {@inheritDoc} */ @Override public Class<?> getSecureObjectClass() { return AbstractEndpoint.class; } /** * * {@inheritDoc} */ @Override public SecurityMetadataSource obtainSecurityMetadataSource() { return this.securityMetadataSource; } /** * * {@inheritDoc} */ public Message postProcess(MessageProcessingContext context, Message inputMessage, Message outputMessage) { if (context.getAttributes().containsKey(STATUS_TOKEN)) { InterceptorStatusToken token = (InterceptorStatusToken) context.getAttributes().get(STATUS_TOKEN); return (Message) afterInvocation(token, outputMessage); } else { return outputMessage; } } /** * * {@inheritDoc} */ public Message preProcess(MessageProcessingContext context, Message inputMessage) { if (!isPassThroughCommand(inputMessage)) { InterceptorStatusToken token = beforeInvocation(context.getMessageTarget()); context.getAttributes().put(STATUS_TOKEN, token); } return inputMessage; } /** * Sets the {@link EndpointSecurityMetadataSource} for the endpoint being secured * * @param newSource the endpoint definition source */ public void setObjectDefinitionSource(EndpointSecurityMetadataSource newSource) { this.securityMetadataSource = newSource; } private void configureDefaultAccessDecisionManager() { AffirmativeBased adm = new AffirmativeBased(); List<AccessDecisionVoter> voters = new ArrayList<AccessDecisionVoter>(); voters.add(new RoleVoter()); voters.add(new AuthenticatedVoter()); adm.setDecisionVoters(voters); setAccessDecisionManager(adm); } private boolean isPassThroughCommand(Message message) { if (message instanceof CommandMessage) { CommandMessage command = (CommandMessage) message; return command.getOperation() == CommandMessage.CLIENT_PING_OPERATION || command.getOperation() == CommandMessage.LOGIN_OPERATION; } return false; } }