/*
* 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.realm;
import java.security.Principal;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import javax.naming.Context;
import org.apache.catalina.Group;
import org.apache.catalina.LifecycleException;
import org.apache.catalina.Role;
import org.apache.catalina.ServerFactory;
import org.apache.catalina.User;
import org.apache.catalina.UserDatabase;
import org.apache.catalina.core.StandardServer;
import org.apache.catalina.util.StringManager;
/**
* <p>Implementation of {@link org.apache.catalina.Realm} that is based on an implementation of
* {@link UserDatabase} made available through the global JNDI resources
* configured for this instance of Catalina. Set the <code>resourceName</code>
* parameter to the global JNDI resources name for the configured instance
* of <code>UserDatabase</code> that we should consult.</p>
*
* @author Craig R. McClanahan
* @version $Revision: 543691 $ $Date: 2007-06-02 03:37:08 +0200 (sam., 02 juin 2007) $
* @since 4.1
*/
public class UserDatabaseRealm
extends RealmBase {
// ----------------------------------------------------- Instance Variables
/**
* The <code>UserDatabase</code> we will use to authenticate users
* and identify associated roles.
*/
protected UserDatabase database = null;
/**
* Descriptive information about this Realm implementation.
*/
protected final String info =
"org.apache.catalina.realm.UserDatabaseRealm/1.0";
/**
* Descriptive information about this Realm implementation.
*/
protected static final String name = "UserDatabaseRealm";
/**
* The global JNDI name of the <code>UserDatabase</code> resource
* we will be utilizing.
*/
protected String resourceName = "UserDatabase";
/**
* The string manager for this package.
*/
private static StringManager sm =
StringManager.getManager(Constants.Package);
// ------------------------------------------------------------- Properties
/**
* Return descriptive information about this Realm implementation and
* the corresponding version number, in the format
* <code><description>/<version></code>.
*/
public String getInfo() {
return info;
}
/**
* Return the global JNDI name of the <code>UserDatabase</code> resource
* we will be using.
*/
public String getResourceName() {
return resourceName;
}
/**
* Set the global JNDI name of the <code>UserDatabase</code> resource
* we will be using.
*
* @param resourceName The new global JNDI name
*/
public void setResourceName(String resourceName) {
this.resourceName = resourceName;
}
// --------------------------------------------------------- Public Methods
/**
* Return <code>true</code> if the specified Principal has the specified
* security role, within the context of this Realm; otherwise return
* <code>false</code>. This implementation returns <code>true</code>
* if the <code>User</code> has the role, or if any <code>Group</code>
* that the <code>User</code> is a member of has the role.
*
* @param principal Principal for whom the role is to be checked
* @param role Security role to be checked
*/
public boolean hasRole(Principal principal, String role) {
if( principal instanceof GenericPrincipal) {
GenericPrincipal gp = (GenericPrincipal)principal;
if(gp.getUserPrincipal() instanceof User) {
principal = gp.getUserPrincipal();
}
}
if(! (principal instanceof User) ) {
//Play nice with SSO and mixed Realms
return super.hasRole(principal, role);
}
if("*".equals(role)) {
return true;
} else if(role == null) {
return false;
}
User user = (User)principal;
Role dbrole = database.findRole(role);
if(dbrole == null) {
return false;
}
if(user.isInRole(dbrole)) {
return true;
}
Iterator groups = user.getGroups();
while(groups.hasNext()) {
Group group = (Group)groups.next();
if(group.isInRole(dbrole)) {
return true;
}
}
return false;
}
// ------------------------------------------------------ Protected Methods
/**
* Return a short name for this Realm implementation.
*/
protected String getName() {
return (name);
}
/**
* Return the password associated with the given principal's user name.
*/
protected String getPassword(String username) {
User user = database.findUser(username);
if (user == null) {
return null;
}
return (user.getPassword());
}
/**
* Return the Principal associated with the given user name.
*/
protected Principal getPrincipal(String username) {
User user = database.findUser(username);
if(user == null) {
return null;
}
List<String> roles = new ArrayList<String>();
Iterator uroles = user.getRoles();
while(uroles.hasNext()) {
Role role = (Role)uroles.next();
roles.add(role.getName());
}
Iterator groups = user.getGroups();
while(groups.hasNext()) {
Group group = (Group)groups.next();
uroles = group.getRoles();
while(uroles.hasNext()) {
Role role = (Role)uroles.next();
roles.add(role.getName());
}
}
return new GenericPrincipal(this, username, user.getPassword(), roles, user);
}
// ------------------------------------------------------ Lifecycle Methods
/**
* Prepare for active use of the public methods of this Component.
*
* @exception LifecycleException if this component detects a fatal error
* that prevents it from being started
*/
public synchronized void start() throws LifecycleException {
// Perform normal superclass initialization
super.start();
try {
StandardServer server = (StandardServer) ServerFactory.getServer();
Context context = server.getGlobalNamingContext();
database = (UserDatabase) context.lookup(resourceName);
} catch (Throwable e) {
containerLog.error(sm.getString("userDatabaseRealm.lookup",
resourceName),
e);
database = null;
}
if (database == null) {
throw new LifecycleException
(sm.getString("userDatabaseRealm.noDatabase", resourceName));
}
}
/**
* Gracefully shut down active use of the public methods of this Component.
*
* @exception LifecycleException if this component detects a fatal error
* that needs to be reported
*/
public synchronized void stop() throws LifecycleException {
// Perform normal superclass finalization
super.stop();
// Release reference to our user database
database = null;
}
}
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