001/* 
002    Licensed to the Apache Software Foundation (ASF) under one
003    or more contributor license agreements.  See the NOTICE file
004    distributed with this work for additional information
005    regarding copyright ownership.  The ASF licenses this file
006    to you under the Apache License, Version 2.0 (the
007    "License"); you may not use this file except in compliance
008    with the License.  You may obtain a copy of the License at
009
010       http://www.apache.org/licenses/LICENSE-2.0
011
012    Unless required by applicable law or agreed to in writing,
013    software distributed under the License is distributed on an
014    "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
015    KIND, either express or implied.  See the License for the
016    specific language governing permissions and limitations
017    under the License.  
018 */
019package org.apache.wiki.auth.login;
020
021import java.io.IOException;
022
023import javax.security.auth.callback.*;
024import javax.servlet.http.HttpServletRequest;
025
026import org.apache.wiki.WikiEngine;
027
028/**
029 * Handles logins made from inside the wiki application, rather than via the web
030 * container. This handler is instantiated in
031 * {@link org.apache.wiki.auth.AuthenticationManager#login(org.apache.wiki.WikiSession,HttpServletRequest, String, String)}.
032 * If container-managed authentication is used, the
033 * {@link WebContainerCallbackHandler}is used instead. This callback handler is
034 * designed to be used with {@link UserDatabaseLoginModule}.
035 * @since 2.3
036 */
037public class WikiCallbackHandler implements CallbackHandler
038{
039    private final HttpServletRequest m_request;
040
041    private final WikiEngine m_engine;
042    
043    private final String       m_password;
044
045    private final String       m_username;
046
047    /**
048     *  Create a new callback handler.
049     * @param engine the WikiEngine
050     * @param request the user's HTTP request. If passed as <code>null</code>,
051     *  later requests for {@link HttpRequestCallback} will return an UnsupportedCallbackException
052     * @param username the username
053     * @param password the password
054     */
055    public WikiCallbackHandler( WikiEngine engine, HttpServletRequest request, String username, String password )
056    {
057        m_request = request;
058        m_engine = engine;
059        m_username = username;
060        m_password = password;
061    }
062
063    /**
064     * @see javax.security.auth.callback.CallbackHandler#handle(javax.security.auth.callback.Callback[])
065     * 
066     * {@inheritDoc}
067     */
068    public void handle( Callback[] callbacks ) throws IOException, UnsupportedCallbackException
069    {
070        for( int i = 0; i < callbacks.length; i++ )
071        {
072            Callback callback = callbacks[i];
073            if ( callback instanceof HttpRequestCallback )
074            {
075                ( (HttpRequestCallback) callback ).setRequest( m_request );
076            }
077            else if( callback instanceof WikiEngineCallback )
078            {
079                ( (WikiEngineCallback) callback ).setEngine( m_engine );
080            }
081            else if ( callback instanceof UserDatabaseCallback )
082            {
083                ( (UserDatabaseCallback) callback ).setUserDatabase( m_engine.getUserManager().getUserDatabase() );
084            }
085            else if ( callback instanceof NameCallback )
086            {
087                ( (NameCallback) callback ).setName( m_username );
088            }
089            else if ( callback instanceof PasswordCallback )
090            {
091                ( (PasswordCallback) callback ).setPassword( m_password.toCharArray() );
092            }
093            else
094            {
095                throw new UnsupportedCallbackException( callback );
096            }
097        }
098    }
099}