/*
* 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.catalina.cluster.authenticator;
import java.security.Principal;
import org.apache.catalina.Container;
import org.apache.catalina.Cluster;
import org.apache.catalina.Engine;
import org.apache.catalina.Host;
import org.apache.catalina.LifecycleException;
import org.apache.catalina.Manager;
import org.apache.catalina.Session;
import org.apache.catalina.authenticator.SingleSignOn;
import org.apache.catalina.authenticator.SingleSignOnEntry;
import org.apache.catalina.cluster.CatalinaCluster;
import org.apache.catalina.cluster.ClusterManager;
import org.apache.catalina.cluster.ClusterValve;
/**
* A <strong>Valve</strong> that supports a "single sign on" user experience on
* each nodes of a cluster, where the security identity of a user who successfully
* authenticates to one web application is propogated to other web applications and
* to other nodes cluster in the same security domain. For successful use, the following
* requirements must be met:
* <ul>
* <li>This Valve must be configured on the Container that represents a
* virtual host (typically an implementation of <code>Host</code>).</li>
* <li>The <code>Realm</code> that contains the shared user and role
* information must be configured on the same Container (or a higher
* one), and not overridden at the web application level.</li>
* <li>The web applications themselves must use one of the standard
* Authenticators found in the
* <code>org.apache.catalina.authenticator</code> package.</li>
* </ul>
*
* @author Fabien Carrion
* @author Peter Rossbach
* @version $Id: ClusterSingleSignOn.java 939539 2010-04-30 01:31:33Z kkolinko $
*/
public class ClusterSingleSignOn
extends SingleSignOn implements ClusterValve {
// ----------------------------------------------------- Instance Variables
/**
* Descriptive information about this Valve implementation.
*/
protected static String info =
"org.apache.catalina.cluster.authenticator.ClusterSingleSignOn/1.0";
protected int messageNumber = 0;
private ClusterSingleSignOnListener clusterSSOListener = null;
// ------------------------------------------------------------- Properties
private CatalinaCluster cluster = null;
/**
* Return descriptive information about this Valve implementation.
*/
public String getInfo() {
return (info);
}
public CatalinaCluster getCluster() {
return cluster;
}
public void setCluster(CatalinaCluster cluster) {
this.cluster = cluster;
}
// ------------------------------------------------------ Lifecycle Methods
/**
* Prepare for the beginning of active use of the public methods of this
* component. This method should be called after <code>configure()</code>,
* and before any of the public methods of the component are utilized.
*
* @exception LifecycleException if this component detects a fatal error
* that prevents this component from being used
*/
public void start() throws LifecycleException {
super.start();
clusterSSOListener = new ClusterSingleSignOnListener();
clusterSSOListener.setClusterSSO(this);
// Load the cluster component, if any
try {
//the channel is already running
Cluster cluster = getCluster();
// stop remove cluster binding
if(cluster == null) {
Container host = getContainer();
if(host != null && host instanceof Host) {
cluster = host.getCluster();
if(cluster != null && cluster instanceof CatalinaCluster) {
setCluster((CatalinaCluster) cluster);
} else {
Container engine = host.getParent();
if(engine != null && engine instanceof Engine) {
cluster = engine.getCluster();
if(cluster != null && cluster instanceof CatalinaCluster) {
setCluster((CatalinaCluster) cluster);
}
} else {
cluster = null;
}
}
}
}
if (cluster == null) {
throw new LifecycleException
("There is no Cluster for ClusterSingleSignOn");
}
((CatalinaCluster)cluster).addClusterListener(clusterSSOListener);
} catch (Throwable t) {
throw new LifecycleException
("ClusterSingleSignOn exception during clusterLoad " + t);
}
}
/**
* Gracefully terminate the active use of the public methods of this
* component. This method should be the last one called on a given
* instance of this component.
*
* @exception LifecycleException if this component detects a fatal error
* that needs to be reported
*/
public void stop() throws LifecycleException {
super.stop();
if (getCluster() != null && getCluster() instanceof CatalinaCluster) {
getCluster().removeClusterListener(clusterSSOListener);
}
}
// --------------------------------------------------------- Public Methods
/**
* Return a String rendering of this object.
*/
public String toString() {
StringBuffer sb = new StringBuffer("ClusterSingleSignOn[");
if (container == null )
sb.append("Container is null");
else
sb.append(container.getName());
sb.append("]");
return (sb.toString());
}
// ------------------------------------------------------ Protected Methods
/**
* Notify the cluster of the addition of a Session to
* an SSO session and associate the specified single
* sign on identifier with the specified Session on the
* local node.
*
* @param ssoId Single sign on identifier
* @param session Session to be associated
*/
protected void associate(String ssoId, Session session) {
boolean addSession = true ;
SingleSignOnEntry entry = lookup(ssoId);
if (entry != null) {
addSession = !entry.sessionExists(session);
}
if(addSession) {
sendSSOId(ssoId,session,SingleSignOnMessage.ADD_SESSION) ;
associateLocal(ssoId, session);
}
}
protected void associateLocal(String ssoId, Session session) {
super.associate(ssoId, session);
}
/**
* Notify the cluster of the removal of a Session from an
* SSO session and deregister the specified session. If it is the last
* session, then also get rid of the single sign on identifier on the
* local node.
*
* @param ssoId Single sign on identifier
* @param session Session to be deregistered
*/
protected void deregister(String ssoId, Session session) {
sendSSOId(ssoId,session,SingleSignOnMessage.DEREGISTER_SESSION) ;
deregisterLocal(ssoId, session);
}
protected void deregisterLocal(String ssoId, Session session) {
super.deregister(ssoId, session);
}
/**
* Notifies the cluster that a single sign on session
* has been terminated due to a user logout, deregister
* the specified single sign on identifier, and invalidate
* any associated sessions on the local node.
*
* @param ssoId Single sign on identifier to deregister
*/
protected void deregister(String ssoId) {
sendSSOId(ssoId,null,SingleSignOnMessage.LOGOUT_SESSION) ;
deregisterLocal(ssoId);
}
protected void deregisterLocal(String ssoId) {
super.deregister(ssoId);
}
/**
* Notifies the cluster of the creation of a new SSO entry
* and register the specified Principal as being associated
* with the specified value for the single sign on identifier.
*
* @param ssoId Single sign on identifier to register
* @param principal Associated user principal that is identified
* @param authType Authentication type used to authenticate this
* user principal
* @param username Username used to authenticate this user
* @param password Password used to authenticate this user
*/
protected void register(String ssoId, Principal principal, String authType,
String username, String password) {
sendSSOIdWithAuth(ssoId,
authType, username, password,
SingleSignOnMessage.REGISTER_SESSION);
registerLocal(ssoId, principal, authType, username, password);
}
protected void registerLocal(String ssoId, Principal principal, String authType,
String username, String password) {
super.register(ssoId, principal, authType, username, password);
}
/**
* Notifies the cluster of an update of the security credentials
* associated with an SSO session. Updates any <code>SingleSignOnEntry</code>
* found under key <code>ssoId</code> with the given authentication data.
* <p>
* The purpose of this method is to allow an SSO entry that was
* established without a username/password combination (i.e. established
* following DIGEST or CLIENT-CERT authentication) to be updated with
* a username and password if one becomes available through a subsequent
* BASIC or FORM authentication. The SSO entry will then be usable for
* reauthentication.
* <p>
* <b>NOTE:</b> Only updates the SSO entry if a call to
* <code>SingleSignOnEntry.getCanReauthenticate()</code> returns
* <code>false</code>; otherwise, it is assumed that the SSO entry already
* has sufficient information to allow reauthentication and that no update
* is needed.
*
* @param ssoId identifier of Single sign to be updated
* @param principal the <code>Principal</code> returned by the latest
* call to <code>Realm.authenticate</code>.
* @param authType the type of authenticator used (BASIC, CLIENT-CERT,
* DIGEST or FORM)
* @param username the username (if any) used for the authentication
* @param password the password (if any) used for the authentication
*/
protected void update(String ssoId, Principal principal, String authType,
String username, String password) {
sendSSOIdWithAuth(ssoId,
authType, username, password,
SingleSignOnMessage.UPDATE_SESSION);
updateLocal(ssoId, principal, authType, username, password);
}
protected void updateLocal(String ssoId, Principal principal, String authType,
String username, String password) {
super.update(ssoId, principal, authType, username, password);
}
/**
* Remove a single Session from a SingleSignOn and notify the cluster
* of the removal. Called when a session is timed out and no longer active.
*
* @param ssoId Single sign on identifier from which to remove the session.
* @param session the session to be removed.
*/
protected void removeSession(String ssoId, Session session) {
sendSSOId(ssoId,session,SingleSignOnMessage.REMOVE_SESSION) ;
removeSessionLocal(ssoId, session);
}
protected void removeSessionLocal(String ssoId, Session session) {
super.removeSession(ssoId, session);
}
/**
* Create SingleSignOnMessage with session informations and send to other domain members.
* @param ssoId identifier of Single sign to be updated
* @param session the session to be handle or null.
* @param action SSO Action type
*/
protected void sendSSOId(String ssoId, Session session, int action) {
if (cluster != null) {
messageNumber++;
String sessionId = null ;
if(session != null)
sessionId = session.getId() ;
SingleSignOnMessage msg =
new SingleSignOnMessage(cluster.getLocalMember(),
ssoId, sessionId);
if(session != null) {
Manager mgr = session.getManager();
if ((mgr != null) && (mgr instanceof ClusterManager))
msg.setContextName(((ClusterManager) mgr).getName());
}
send(msg,action);
}
}
/**
* Create SingleSignOnMessage with auth informations and send to other domain members.
* @param ssoId identifier of Single sign to be updated
* @param authType the type of authenticator used (BASIC, CLIENT-CERT,
* DIGEST or FORM)
* @param username the username (if any) used for the authentication
* @param password the password (if any) used for the authentication
* @param action SSO Action type
*/
protected void sendSSOIdWithAuth(String ssoId,String authType,
String username, String password, int action) {
if (cluster != null) {
messageNumber++;
SingleSignOnMessage msg =
new SingleSignOnMessage(cluster.getLocalMember(),
ssoId, null);
msg.setAuthType(authType);
msg.setUsername(username);
msg.setPassword(password);
send(msg,action);
}
}
/**
* Send SingleSignOnMessage to other domain members.
* @param msg SingleSignOnMessage
* @param action SSO Action type
*/
protected void send(SingleSignOnMessage msg, int action) {
msg.setAction(action);
cluster.sendClusterDomain(msg);
if (containerLog.isDebugEnabled())
containerLog.debug("SingleSignOnMessage Send with action "
+ action);
}
}