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.security.cert.X509Certificate;
  
  import org.apache.activemq.broker.Broker;
  import org.apache.activemq.broker.BrokerFilter;
  import org.apache.activemq.broker.ConnectionContext;
  import org.apache.activemq.broker.Connector;
  import org.apache.activemq.broker.EmptyBroker;
  import org.apache.activemq.broker.TransportConnector;
  import org.apache.activemq.command.ActiveMQDestination;
  import org.apache.activemq.command.ConnectionInfo;
  
  /**
   * A JAAS Authentication Broker that uses different JAAS domain configurations
   * depending if the connection is over an SSL enabled Connector or not.
   *
   * This allows you to, for instance, do DN based authentication for SSL connections
   * and use a mixture of username/passwords and simple guest authentication for
   * non-SSL connections.
   * <p>
   * An example <code>login.config</code> to do do this is:
   * <pre>
   * activemq-domain {
   *   org.apache.activemq.jaas.PropertiesLoginModule sufficient
   *       debug=true
   *       org.apache.activemq.jaas.properties.user="users.properties"
   *       org.apache.activemq.jaas.properties.group="groups.properties";
   *   org.apache.activemq.jaas.GuestLoginModule sufficient
   *       debug=true
   *       org.apache.activemq.jaas.guest.user="guest"
   *       org.apache.activemq.jaas.guest.group="guests";
   * };
   *
   * activemq-ssl-domain {
   *   org.apache.activemq.jaas.TextFileCertificateLoginModule required
   *       debug=true
   *       org.apache.activemq.jaas.textfiledn.user="dns.properties"
   *       org.apache.activemq.jaas.textfiledn.group="groups.properties";
   * };
   * </pre>
   */
  public class JaasDualAuthenticationBroker extends BrokerFilter implements AuthenticationBroker {
      private final JaasCertificateAuthenticationBroker sslBroker;
      private final JaasAuthenticationBroker nonSslBroker;
  
  
      /*** Simple constructor. Leaves everything to superclass.
       *
       * @param next The Broker that does the actual work for this Filter.
       * @param jaasConfiguration The JAAS domain configuration name for
       *                non-SSL connections (refer to JAAS documentation).
       * @param jaasSslConfiguration The JAAS domain configuration name for
       *                SSL connections (refer to JAAS documentation).
       */
      public JaasDualAuthenticationBroker(Broker next, String jaasConfiguration, String jaasSslConfiguration) {
          super(next);
  
          this.nonSslBroker = new JaasAuthenticationBroker(new EmptyBroker(), jaasConfiguration);
          this.sslBroker = new JaasCertificateAuthenticationBroker(new EmptyBroker(), jaasSslConfiguration);
      }
  
      /**
       * Overridden to allow for authentication using different Jaas
       * configurations depending on if the connection is SSL or not.
       *
       * @param context The context for the incoming Connection.
       * @param info The ConnectionInfo Command representing the incoming
       *                connection.
       */
      @Override
      public void addConnection(ConnectionContext context, ConnectionInfo info) throws Exception {
          if (context.getSecurityContext() == null) {
              if (isSSL(context, info)) {
                  this.sslBroker.addConnection(context, info);
              } else {
                  this.nonSslBroker.addConnection(context, info);
              }
              super.addConnection(context, info);
          }
      }
  
      /**
       * Overriding removeConnection to make sure the security context is cleaned.
       */
      @Override
      public void removeConnection(ConnectionContext context, ConnectionInfo info, Throwable error) throws Exception {
          super.removeConnection(context, info, error);
          if (isSSL(context, info)) {
              this.sslBroker.removeConnection(context, info, error);
          } else {
              this.nonSslBroker.removeConnection(context, info, error);
          }
      }
  
      protected boolean isSSL(ConnectionContext context, ConnectionInfo info) throws Exception {
          boolean sslCapable = false;
          Connector connector = context.getConnector();
          if (connector instanceof TransportConnector) {
              TransportConnector transportConnector = (TransportConnector) connector;
              sslCapable = transportConnector.getServer().isSslServer();
          }
          // AMQ-5943, also check if transport context carries X509 cert
          if (!sslCapable && info.getTransportContext() instanceof X509Certificate[]) {
              sslCapable = true;
          }
          return sslCapable;
      }
  
      @Override
      public void removeDestination(ConnectionContext context, ActiveMQDestination destination, long timeout) throws Exception {
          // Give both a chance to clear out their contexts
          this.sslBroker.removeDestination(context, destination, timeout);
          this.nonSslBroker.removeDestination(context, destination, timeout);
  
          super.removeDestination(context, destination, timeout);
      }
  
      @Override
      public SecurityContext authenticate(String username, String password, X509Certificate[] peerCertificates) throws SecurityException {
          if (peerCertificates != null) {
              return this.sslBroker.authenticate(username, password, peerCertificates);
          } else {
              return this.nonSslBroker.authenticate(username, password, peerCertificates);
          }
      }
  }
  