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
023 import javax.security.auth.Subject;
024 import javax.security.auth.callback.CallbackHandler;
025 import javax.security.auth.login.LoginContext;
026
027 import org.apache.activemq.broker.Broker;
028 import org.apache.activemq.broker.BrokerFilter;
029 import org.apache.activemq.broker.ConnectionContext;
030 import org.apache.activemq.command.ConnectionInfo;
031 import org.apache.activemq.jaas.JaasCertificateCallbackHandler;
032 import org.apache.activemq.jaas.UserPrincipal;
033
034 /**
035 * A JAAS Authentication Broker that uses SSL Certificates. This class will
036 * provide the JAAS framework with a JaasCertificateCallbackHandler that will
037 * grant JAAS access to incoming connections' SSL certificate chains. NOTE:
038 * There is a chance that the incoming connection does not have a valid
039 * certificate (has null).
040 *
041 * @author sepandm@gmail.com (Sepand)
042 */
043 public class JaasCertificateAuthenticationBroker extends BrokerFilter {
044 private final String jaasConfiguration;
045
046 /**
047 * Simple constructor. Leaves everything to superclass.
048 *
049 * @param next The Broker that does the actual work for this Filter.
050 * @param jassConfiguration The JAAS domain configuration name (refere to
051 * JAAS documentation).
052 */
053 public JaasCertificateAuthenticationBroker(Broker next, String jaasConfiguration) {
054 super(next);
055
056 this.jaasConfiguration = jaasConfiguration;
057 }
058
059 /**
060 * Overridden to allow for authentication based on client certificates.
061 * Connections being added will be authenticated based on their certificate
062 * chain and the JAAS module specified through the JAAS framework. NOTE: The
063 * security context's username will be set to the first UserPrincipal
064 * created by the login module.
065 *
066 * @param context The context for the incoming Connection.
067 * @param info The ConnectionInfo Command representing the incoming
068 * connection.
069 */
070 public void addConnection(ConnectionContext context, ConnectionInfo info) throws Exception {
071
072 if (context.getSecurityContext() == null) {
073 if (!(info.getTransportContext() instanceof X509Certificate[])) {
074 throw new SecurityException("Unable to authenticate transport without SSL certificate.");
075 }
076
077 // Set the TCCL since it seems JAAS needs it to find the login
078 // module classes.
079 ClassLoader original = Thread.currentThread().getContextClassLoader();
080 Thread.currentThread().setContextClassLoader(JaasAuthenticationBroker.class.getClassLoader());
081 try {
082 // Do the login.
083 try {
084 CallbackHandler callback = new JaasCertificateCallbackHandler((X509Certificate[])info.getTransportContext());
085 LoginContext lc = new LoginContext(jaasConfiguration, callback);
086 lc.login();
087 Subject subject = lc.getSubject();
088
089 String dnName = "";
090
091 for (Principal principal : subject.getPrincipals()) {
092 if (principal instanceof UserPrincipal) {
093 dnName = ((UserPrincipal)principal).getName();
094 break;
095 }
096 }
097 SecurityContext s = new JaasCertificateSecurityContext(dnName, subject, (X509Certificate[])info.getTransportContext());
098 context.setSecurityContext(s);
099 } catch (Exception e) {
100 throw new SecurityException("User name [" + info.getUserName() + "] or password is invalid. " + e.getMessage(), e);
101 }
102 } finally {
103 Thread.currentThread().setContextClassLoader(original);
104 }
105 }
106 super.addConnection(context, info);
107 }
108
109 /**
110 * Overriding removeConnection to make sure the security context is cleaned.
111 */
112 public void removeConnection(ConnectionContext context, ConnectionInfo info, Throwable error) throws Exception {
113 super.removeConnection(context, info, error);
114
115 context.setSecurityContext(null);
116 }
117 }