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Java > Open Source Codes > org > mr > kernel > security > authentication > MantaCallbackHandler


1 /*
2  * Copyright 2002 by
3  * <a HREF="http://www.coridan.com">Coridan</a>
4  * <a HREF="mailto: support@coridan.com ">support@coridan.com</a>
5  *
6  * The contents of this file are subject to the Mozilla Public License Version
7  * 1.1 (the "License"); you may not use this file except in compliance with the
8  * License. You may obtain a copy of the License at
9  * http://www.mozilla.org/MPL/
10  *
11  * Software distributed under the License is distributed on an "AS IS" basis,
12  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
13  * for the specific language governing rights and limitations under the
14  * License.
15  *
16  * The Original Code is "MantaRay" (TM).
17  *
18  * The Initial Developer of the Original Code is Shirley Sasson.
19  * Portions created by the Initial Developer are Copyright (C) 2006
20  * Coridan Inc. All Rights Reserved.
21  *
22  * Contributor(s): all the names of the contributors are added in the source
23  * code where applicable.
24  *
25  * Alternatively, the contents of this file may be used under the terms of the
26  * LGPL license (the "GNU LESSER GENERAL PUBLIC LICENSE"), in which case the
27  * provisions of LGPL are applicable instead of those above. If you wish to
28  * allow use of your version of this file only under the terms of the LGPL
29  * License and not to allow others to use your version of this file under
30  * the MPL, indicate your decision by deleting the provisions above and
31  * replace them with the notice and other provisions required by the LGPL.
32  * If you do not delete the provisions above, a recipient may use your version
33  * of this file under either the MPL or the GNU LESSER GENERAL PUBLIC LICENSE.
34  
35  *
36  * This library is free software; you can redistribute it and/or modify it
37  * under the terms of the MPL as stated above or under the terms of the GNU
38  * Lesser General Public License as published by the Free Software Foundation;
39  * either version 2.1 of the License, or any later version.
40  *
41  * This library is distributed in the hope that it will be useful, but WITHOUT
42  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
43  * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
44  * License for more details.
45  */
46
47 package org.mr.kernel.security.authentication;
48
49 import org.apache.commons.logging.Log;
50 import org.apache.commons.logging.LogFactory;
51
52 import javax.security.auth.callback.*;
53 import java.io.IOException JavaDoc;
54
55 /**
56  * This class is the implementation of {@link javax.security.auth.callback.CallbackHandler}
57  * used for JAAS authentication.
58  *
59  * @version 1.0
60  * @since Mar 26, 2006
61  * @author Shirley Sasson
62  *
63  */
64 public class MantaCallbackHandler implements CallbackHandler {
65     private String JavaDoc _username;
66     private String JavaDoc _password = "";
67     private Log _logger;
68
69     /**
70      * Constructs a MantaCallbackHandler.
71      *
72      */
73     public MantaCallbackHandler(String JavaDoc username, String JavaDoc password){
74         _username = username;
75         if (password != null)
76             _password = password;
77     }
78
79     /**
80      * Retrieve or display the information requested in the provided Callbacks.
81      *
82      *
83      * @param callbacks
84      * an array of Callback objects provided by an underlying security
85      * service which contains the information requested to be retrieved or displayed.
86      * @throws IOException if an input or output error occurs.
87      * @throws UnsupportedCallbackException if the implementation of this method does not support
88      * one or more of the Callbacks specified in the callbacks parameter.
89      */
90     public void handle(Callback callbacks[]) throws IOException JavaDoc, UnsupportedCallbackException {
91         for (int i=0 ; i<callbacks.length ; i++) {
92             if (callbacks[i] instanceof NameCallback) {
93                 // set the username
94 NameCallback nameCallback = (NameCallback) callbacks[i];
95                 nameCallback.setName(_username);
96             }
97             else if (callbacks[i] instanceof PasswordCallback) {
98                 // set the password
99 PasswordCallback passwordCallback = (PasswordCallback) callbacks[i];
100                 passwordCallback.setPassword(_password.toCharArray());
101             }
102             else {
103                 if (getLogger().isErrorEnabled())
104                     getLogger().error("[handle] Callback handler not supported: " + callbacks[i]);
105                 throw new UnsupportedCallbackException(callbacks[i], "Callback handler not supported");
106             }
107         }
108     }
109
110     /**
111      * Returns the instance of the logger for this class
112      *
113      * @return the instance of the logger
114      */
115     public Log getLogger(){
116         if (_logger == null){
117             _logger = LogFactory.getLog(getClass().getName());
118         }
119         return _logger;
120     }
121 }
122
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