001    /**
002     *
003     * Copyright 2004 The Apache Software Foundation
004     *
005     *  Licensed under the Apache License, Version 2.0 (the "License");
006     *  you may not use this file except in compliance with the License.
007     *  You may obtain a copy of the License at
008     *
009     *     http://www.apache.org/licenses/LICENSE-2.0
010     *
011     *  Unless required by applicable law or agreed to in writing, software
012     *  distributed under the License is distributed on an "AS IS" BASIS,
013     *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014     *  See the License for the specific language governing permissions and
015     *  limitations under the License.
016     */
017    package org.apache.geronimo.jmxremoting;
018    
019    import java.util.Arrays;
020    import java.io.Serializable;
021    import javax.security.auth.callback.Callback;
022    import javax.security.auth.callback.CallbackHandler;
023    import javax.security.auth.callback.NameCallback;
024    import javax.security.auth.callback.PasswordCallback;
025    import javax.security.auth.callback.UnsupportedCallbackException;
026    
027    /**
028     * Simple wrapper for a username and password.
029     * 
030     * @version $Rev: 355877 $ $Date: 2005-12-10 18:48:27 -0800 (Sat, 10 Dec 2005) $
031     */
032    public class Credentials implements CallbackHandler, Serializable {
033        private final String username;
034        private final char[] password;
035    
036        public Credentials(String username, String password) {
037            this.username = username;
038            this.password = password == null ? null : password.toCharArray();
039        }
040    
041        public void handle(Callback[] callbacks) throws UnsupportedCallbackException {
042            for (int i = 0; i < callbacks.length; i++) {
043                Callback callback = callbacks[i];
044                if (callback instanceof NameCallback) {
045                    NameCallback nc = (NameCallback) callback;
046                    nc.setName(username);
047                } else if (callback instanceof PasswordCallback) {
048                    PasswordCallback pc = (PasswordCallback) callback;
049                    pc.setPassword(password);
050                } else {
051                    throw new UnsupportedCallbackException(callback);
052                }
053            }
054        }
055    
056        public void clear() {
057            if(password != null) {
058                Arrays.fill(password, '\0');
059            }
060        }
061    }