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    1   /**
    2    *  Licensed to the Apache Software Foundation (ASF) under one or more
    3    *  contributor license agreements.  See the NOTICE file distributed with
    4    *  this work for additional information regarding copyright ownership.
    5    *  The ASF licenses this file to You under the Apache License, Version 2.0
    6    *  (the "License"); you may not use this file except in compliance with
    7    *  the License.  You may obtain a copy of the License at
    8    *
    9    *     http://www.apache.org/licenses/LICENSE-2.0
   10    *
   11    *  Unless required by applicable law or agreed to in writing, software
   12    *  distributed under the License is distributed on an "AS IS" BASIS,
   13    *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   14    *  See the License for the specific language governing permissions and
   15    *  limitations under the License.
   16    */
   17   package org.apache.geronimo.jmxremoting;
   18   
   19   import java.util.Arrays;
   20   import java.io.Serializable;
   21   import javax.security.auth.callback.Callback;
   22   import javax.security.auth.callback.CallbackHandler;
   23   import javax.security.auth.callback.NameCallback;
   24   import javax.security.auth.callback.PasswordCallback;
   25   import javax.security.auth.callback.UnsupportedCallbackException;
   26   
   27   /**
   28    * Simple wrapper for a username and password.
   29    * 
   30    * @version $Rev: 476049 $ $Date: 2006-11-16 20:35:17 -0800 (Thu, 16 Nov 2006) $
   31    */
   32   public class Credentials implements CallbackHandler, Serializable {
   33       private final String username;
   34       private final char[] password;
   35   
   36       public Credentials(String username, String password) {
   37           this.username = username;
   38           this.password = password == null ? null : password.toCharArray();
   39       }
   40   
   41       public void handle(Callback[] callbacks) throws UnsupportedCallbackException {
   42           for (int i = 0; i < callbacks.length; i++) {
   43               Callback callback = callbacks[i];
   44               if (callback instanceof NameCallback) {
   45                   NameCallback nc = (NameCallback) callback;
   46                   nc.setName(username);
   47               } else if (callback instanceof PasswordCallback) {
   48                   PasswordCallback pc = (PasswordCallback) callback;
   49                   pc.setPassword(password);
   50               } else {
   51                   throw new UnsupportedCallbackException(callback);
   52               }
   53           }
   54       }
   55   
   56       public void clear() {
   57           if(password != null) {
   58               Arrays.fill(password, '\0');
   59           }
   60       }
   61   }

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