content: /**
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements.  See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.
   * The ASF licenses this file to You 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.apache.activemq.security;
  
  import java.util.Set;
  
  import org.apache.activemq.broker.ConnectionContext;
  import org.apache.activemq.broker.region.Destination;
  import org.apache.activemq.broker.region.DestinationFilter;
  import org.apache.activemq.broker.region.Subscription;
  import org.apache.activemq.command.ActiveMQDestination;
  
  /**
   * Authorizes addSubscription calls.
   */
  public class AuthorizationDestinationFilter extends DestinationFilter {
  
      private final AuthorizationBroker broker;
  
      public AuthorizationDestinationFilter(Destination destination, AuthorizationBroker broker) {
          super(destination);
          this.broker = broker;
      }
  
      @Override
      public void addSubscription(ConnectionContext context, Subscription sub) throws Exception {
          // authorize subscription
          final SecurityContext securityContext = broker.checkSecurityContext(context);
  
          final AuthorizationMap authorizationMap = broker.getAuthorizationMap();
          // use the destination being filtered, instead of the destination from the consumerinfo in the subscription
          // since that could be a wildcard destination
          final ActiveMQDestination destination = next.getActiveMQDestination();
  
          Set<?> allowedACLs;
          if (!destination.isTemporary()) {
              allowedACLs = authorizationMap.getReadACLs(destination);
          } else {
              allowedACLs = authorizationMap.getTempDestinationReadACLs();
          }
  
          if (!securityContext.isBrokerContext() && allowedACLs != null && !securityContext.isInOneOf(allowedACLs) ) {
              throw new SecurityException("User " + securityContext.getUserName() + " is not authorized to read from: " + destination);
          }
  
          super.addSubscription(context, sub);
      }
  
  }
  