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 package org.apache.activemq.security;
018
019 import java.security.Principal;
020 import java.util.Iterator;
021 import java.util.Set;
022 import java.util.concurrent.CopyOnWriteArrayList;
023
024 import javax.security.auth.Subject;
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.JassCredentialCallbackHandler;
032
033 /**
034 * Logs a user in using JAAS.
035 *
036 *
037 */
038 public class JaasAuthenticationBroker extends BrokerFilter {
039
040 private final String jassConfiguration;
041 private final CopyOnWriteArrayList<SecurityContext> securityContexts = new CopyOnWriteArrayList<SecurityContext>();
042
043 public JaasAuthenticationBroker(Broker next, String jassConfiguration) {
044 super(next);
045 this.jassConfiguration = jassConfiguration;
046 }
047
048 static class JaasSecurityContext extends SecurityContext {
049
050 private final Subject subject;
051
052 public JaasSecurityContext(String userName, Subject subject) {
053 super(userName);
054 this.subject = subject;
055 }
056
057 public Set<Principal> getPrincipals() {
058 return subject.getPrincipals();
059 }
060
061 }
062
063 public void addConnection(ConnectionContext context, ConnectionInfo info) throws Exception {
064
065 if (context.getSecurityContext() == null) {
066 // Set the TCCL since it seems JAAS needs it to find the login
067 // module classes.
068 ClassLoader original = Thread.currentThread().getContextClassLoader();
069 Thread.currentThread().setContextClassLoader(JaasAuthenticationBroker.class.getClassLoader());
070 try {
071 // Do the login.
072 try {
073 JassCredentialCallbackHandler callback = new JassCredentialCallbackHandler(info
074 .getUserName(), info.getPassword());
075 LoginContext lc = new LoginContext(jassConfiguration, callback);
076 lc.login();
077 Subject subject = lc.getSubject();
078
079 SecurityContext s = new JaasSecurityContext(info.getUserName(), subject);
080 context.setSecurityContext(s);
081 securityContexts.add(s);
082 } catch (Exception e) {
083 throw (SecurityException)new SecurityException("User name [" + info.getUserName() + "] or password is invalid.")
084 .initCause(e);
085 }
086 } finally {
087 Thread.currentThread().setContextClassLoader(original);
088 }
089 }
090 super.addConnection(context, info);
091 }
092
093 public void removeConnection(ConnectionContext context, ConnectionInfo info, Throwable error)
094 throws Exception {
095 super.removeConnection(context, info, error);
096 if (securityContexts.remove(context.getSecurityContext())) {
097 context.setSecurityContext(null);
098 }
099 }
100
101 /**
102 * Previously logged in users may no longer have the same access anymore.
103 * Refresh all the logged into users.
104 */
105 public void refresh() {
106 for (Iterator<SecurityContext> iter = securityContexts.iterator(); iter.hasNext();) {
107 SecurityContext sc = iter.next();
108 sc.getAuthorizedReadDests().clear();
109 sc.getAuthorizedWriteDests().clear();
110 }
111 }
112 }