001    /*
002     * Copyright 2010 the original author or authors.
003     * 
004     *  Licensed under the Apache License, Version 2.0 (the "License");
005     *  you may not use this file except in compliance with the License.
006     *  You may obtain a copy of the License at
007     *
008     *      http://www.apache.org/licenses/LICENSE-2.0
009     *
010     *  Unless required by applicable law or agreed to in writing, software
011     *  distributed under the License is distributed on an "AS IS" BASIS,
012     *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013     *  See the License for the specific language governing permissions and
014     *  limitations under the License.
015     */
016    package com.hs.mail.security.login;
017    
018    import java.io.IOException;
019    
020    import javax.security.auth.callback.Callback;
021    import javax.security.auth.callback.CallbackHandler;
022    import javax.security.auth.callback.NameCallback;
023    import javax.security.auth.callback.PasswordCallback;
024    import javax.security.auth.callback.UnsupportedCallbackException;
025    
026    /**
027     * Basic JAAS username password CallbackHandler
028     * 
029     * @author Won Chul Doh
030     * @since Jul 18, 2007
031     *
032     */
033    public class BasicCallbackHandler implements CallbackHandler {
034    
035            private String username;
036            private char[] password;
037    
038            public BasicCallbackHandler(String username, char[] password) {
039                    this.username = username;
040                    this.password = password;
041            }
042    
043            public void handle(Callback[] callbacks) throws IOException,
044                            UnsupportedCallbackException {
045                    for (int i = 0; i < callbacks.length; i++) {
046                            Callback callback = callbacks[i];
047                            if (callback instanceof NameCallback)
048                                    ((NameCallback) callback).setName(username);
049                            else if (callback instanceof PasswordCallback)
050                                    ((PasswordCallback) callback).setPassword(password);
051                            else
052                                    throw new UnsupportedCallbackException(callback,
053                                                    "Callback class not supported");
054                    }
055            }
056    
057    }