001 /**
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements. See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License. You may obtain a copy of the License at
008 *
009 * http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017
018 package org.apache.activemq.security;
019
020 import java.security.Principal;
021 import java.security.cert.X509Certificate;
022 import java.util.Iterator;
023
024 import javax.security.auth.Subject;
025 import javax.security.auth.callback.CallbackHandler;
026 import javax.security.auth.login.LoginContext;
027
028 import org.apache.activemq.broker.Broker;
029 import org.apache.activemq.broker.BrokerFilter;
030 import org.apache.activemq.broker.ConnectionContext;
031 import org.apache.activemq.command.ConnectionInfo;
032 import org.apache.activemq.jaas.JaasCertificateCallbackHandler;
033 import org.apache.activemq.jaas.UserPrincipal;
034
035 /**
036 * A JAAS Authentication Broker that uses SSL Certificates. This class will
037 * provide the JAAS framework with a JaasCertificateCallbackHandler that will
038 * grant JAAS access to incoming connections' SSL certificate chains. NOTE:
039 * There is a chance that the incoming connection does not have a valid
040 * certificate (has null).
041 *
042 * @author sepandm@gmail.com (Sepand)
043 */
044 public class JaasCertificateAuthenticationBroker extends BrokerFilter {
045 private final String jaasConfiguration;
046
047 /**
048 * Simple constructor. Leaves everything to superclass.
049 *
050 * @param next The Broker that does the actual work for this Filter.
051 * @param jassConfiguration The JAAS domain configuration name (refere to
052 * JAAS documentation).
053 */
054 public JaasCertificateAuthenticationBroker(Broker next, String jaasConfiguration) {
055 super(next);
056
057 this.jaasConfiguration = jaasConfiguration;
058 }
059
060 /**
061 * Overridden to allow for authentication based on client certificates.
062 * Connections being added will be authenticated based on their certificate
063 * chain and the JAAS module specified through the JAAS framework. NOTE: The
064 * security context's username will be set to the first UserPrincipal
065 * created by the login module.
066 *
067 * @param context The context for the incoming Connection.
068 * @param info The ConnectionInfo Command representing the incoming
069 * connection.
070 */
071 public void addConnection(ConnectionContext context, ConnectionInfo info) throws Exception {
072
073 if (context.getSecurityContext() == null) {
074 if (!(info.getTransportContext() instanceof X509Certificate[])) {
075 throw new SecurityException("Unable to authenticate transport without SSL certificate.");
076 }
077
078 // Set the TCCL since it seems JAAS needs it to find the login
079 // module classes.
080 ClassLoader original = Thread.currentThread().getContextClassLoader();
081 Thread.currentThread().setContextClassLoader(JaasAuthenticationBroker.class.getClassLoader());
082 try {
083 // Do the login.
084 try {
085 CallbackHandler callback = new JaasCertificateCallbackHandler((X509Certificate[])info.getTransportContext());
086 LoginContext lc = new LoginContext(jaasConfiguration, callback);
087 lc.login();
088 Subject subject = lc.getSubject();
089
090 String dnName = "";
091
092 for (Iterator iter = subject.getPrincipals().iterator(); iter.hasNext();) {
093 Principal nextPrincipal = (Principal)iter.next();
094 if (nextPrincipal instanceof UserPrincipal) {
095 dnName = ((UserPrincipal)nextPrincipal).getName();
096 break;
097 }
098 }
099 SecurityContext s = new JaasCertificateSecurityContext(dnName, subject, (X509Certificate[])info.getTransportContext());
100 context.setSecurityContext(s);
101 } catch (Exception e) {
102 throw new SecurityException("User name or password is invalid: " + e.getMessage(), e);
103 }
104 } finally {
105 Thread.currentThread().setContextClassLoader(original);
106 }
107 }
108 super.addConnection(context, info);
109 }
110
111 /**
112 * Overriding removeConnection to make sure the security context is cleaned.
113 */
114 public void removeConnection(ConnectionContext context, ConnectionInfo info, Throwable error) throws Exception {
115 super.removeConnection(context, info, error);
116
117 context.setSecurityContext(null);
118 }
119 }