/**
*
* 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 org.apache.activemq.broker.Broker;
import org.apache.activemq.broker.BrokerFilter;
import org.apache.activemq.broker.ConnectionContext;
import org.apache.activemq.command.ConnectionInfo;
import org.apache.activemq.jaas.JaasCertificateCallbackHandler;
import org.apache.activemq.jaas.UserPrincipal;
import org.apache.activemq.security.JaasAuthenticationBroker.JaasSecurityContext;
import java.security.Principal;
import java.security.cert.X509Certificate;
import java.util.Iterator;
import javax.security.auth.Subject;
import javax.security.auth.callback.CallbackHandler;
import javax.security.auth.login.LoginContext;
/**
* A JAAS Authentication Broker that uses SSL Certificates.
*
* This class will provide the JAAS framework with a JaasCertificateCallbackHandler that will grant JAAS access to
* incoming connections' SSL certificate chains.
* NOTE: There is a chance that the incoming connection does not have a valid certificate (has null).
*
* @author sepandm@gmail.com (Sepand)
*/
public class JaasCertificateAuthenticationBroker extends BrokerFilter {
private final String jaasConfiguration;
/**
* Simple constructor. Leaves everything to superclass.
*
* @param next The Broker that does the actual work for this Filter.
* @param jassConfiguration The JAAS domain configuration name (refere to JAAS documentation).
*/
public JaasCertificateAuthenticationBroker(Broker next, String jaasConfiguration) {
super(next);
this.jaasConfiguration = jaasConfiguration;
}
/**
* Overridden to allow for authentication based on client certificates.
*
* Connections being added will be authenticated based on their certificate chain and the JAAS module specified
* through the JAAS framework.
* NOTE: The security context's username will be set to the first UserPrincipal created by the login module.
*
* @param context The context for the incoming Connection.
* @param info The ConnectionInfo Command representing the incoming connection.
*/
public void addConnection(ConnectionContext context, ConnectionInfo info) throws Exception {
if (context.getSecurityContext() == null) {
if (!( info.getTransportContext() instanceof X509Certificate[] )) {
throw new SecurityException("Unable to authenticate transport without SSL certificate.");
}
// Set the TCCL since it seems JAAS needs it to find the login module classes.
ClassLoader original = Thread.currentThread().getContextClassLoader();
Thread.currentThread().setContextClassLoader(JaasAuthenticationBroker.class.getClassLoader());
try {
// Do the login.
try {
CallbackHandler callback =
new JaasCertificateCallbackHandler((X509Certificate[])info.getTransportContext());
LoginContext lc = new LoginContext(jaasConfiguration, callback);
lc.login();
Subject subject = lc.getSubject();
String dnName = "";
for (Iterator iter = subject.getPrincipals().iterator(); iter.hasNext(); ) {
Principal nextPrincipal = (Principal)iter.next();
if (nextPrincipal instanceof UserPrincipal) {
dnName = ((UserPrincipal)nextPrincipal).getName();
break;
}
}
SecurityContext s = new JaasCertificateSecurityContext(
dnName, subject, (X509Certificate[])info.getTransportContext());
context.setSecurityContext(s);
} catch (Exception e) {
throw new SecurityException("User name or password is invalid: " + e.getMessage(), e);
}
} finally {
Thread.currentThread().setContextClassLoader(original);
}
}
super.addConnection(context, info);
}
/**
* Overriding removeConnection to make sure the security context is cleaned.
*/
public void removeConnection(ConnectionContext context, ConnectionInfo info, Throwable error) throws Exception {
super.removeConnection(context, info, error);
context.setSecurityContext(null);
}
}