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


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.mr.kernel.security.MantaSecurityException;
50
51 import javax.security.auth.Subject JavaDoc;
52 import javax.security.auth.login.Configuration JavaDoc;
53 import javax.security.auth.login.LoginContext JavaDoc;
54 import javax.security.auth.login.LoginException JavaDoc;
55
56 import org.apache.commons.logging.Log;
57 import org.apache.commons.logging.LogFactory;
58
59 /**
60  * This class is responsible for performing the JAAS authentication.
61  * It uses the configuration defined in
62  * {@link org.mr.kernel.security.authentication.AuthenticationConfiguration}.
63  *
64  * The method {@link #isAuthenticated(String, String)} performs the authentication.
65  *
66  * This class is a singltone.
67  *
68  * @version 1.0
69  * @since May 7, 2006
70  * @author Shirley Sasson
71  *
72  */

73 public class MantaACLAuthenticationManager {
74     private static MantaACLAuthenticationManager _instance;
75     private Log _logger;
76
77     private MantaACLAuthenticationManager(){}
78
79     /**
80       * Returns the single instance of MantaACLAuthenticationManager.
81       *
82       * @return the single instance of MantaACLAuthenticationManager
83       */

84     public static MantaACLAuthenticationManager getInstance() {
85         if (_instance == null){
86             synchronized(MantaACLAuthenticationManager.class){
87                 if (_instance == null)
88                     _instance = new MantaACLAuthenticationManager();
89             }
90         }
91         return _instance;
92     }
93
94     /**
95      * This method performs the JAAS authentication, according to the configuration
96      * defined at {@link org.mr.kernel.security.authentication.AuthenticationConfiguration}.
97      * If the authentication was successful, the methos returns a Subject instance that
98      * represents the authenticated user.
99      *
100      * @param username the authenticated username
101      * @param password the authentication password
102      * @return a Subject instance that represents the authenticated user
103      * @throws MantaSecurityException if an error occured
104      */

105     public Subject JavaDoc isAuthenticated(String JavaDoc username, String JavaDoc password) throws MantaSecurityException {
106         try {
107             MantaCallbackHandler callbackHander = new MantaCallbackHandler(username, password);
108             Configuration.setConfiguration(new AuthenticationConfiguration());
109             LoginContext JavaDoc loginContext = new LoginContext JavaDoc("", callbackHander);
110             loginContext.login();
111
112             if (getLogger().isInfoEnabled())
113                 getLogger().info("[isAuthenticated] User " + username + " has been authenticated");
114
115             Subject JavaDoc subject = loginContext.getSubject();
116             loginContext.logout();
117             return subject;
118         }
119         catch (LoginException JavaDoc le){
120             if (getLogger().isErrorEnabled())
121                 getLogger().error("[isAuthenticated] Error while authenticating user " + username + ". " + le.getMessage());
122             throw new MantaSecurityException("Error while authenticating user " + username + ". " + le.getMessage());
123         }
124     }
125
126     /**
127      * Returns the instance of the logger for this class
128      *
129      * @return the instance of the logger
130      */

131     public Log getLogger(){
132         if (_logger == null){
133             _logger = LogFactory.getLog(getClass().getName());
134         }
135         return _logger;
136     }
137 }
138
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