Home » geronimo-2.2-source-release » org.apache.geronimo.security.realm.providers » [javadoc | source]

    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.security.realm.providers;
   18   
   19   import java.util.Arrays;
   20   import javax.security.auth.callback.Callback;
   21   import javax.security.auth.callback.CallbackHandler;
   22   import javax.security.auth.callback.NameCallback;
   23   import javax.security.auth.callback.PasswordCallback;
   24   import javax.security.auth.callback.UnsupportedCallbackException;
   25   
   26   /**
   27    * @version $Rev: 476049 $ $Date: 2006-11-16 20:35:17 -0800 (Thu, 16 Nov 2006) $
   28    */
   29   public class PasswordCallbackHandler implements ClearableCallbackHandler {
   30       private final String username;
   31       private final char[] password;
   32   
   33       public PasswordCallbackHandler(String username, char[] password) {
   34           this.username = username;
   35           this.password = password;
   36       }
   37   
   38       public void handle(Callback[] callbacks) throws UnsupportedCallbackException {
   39           for (int i = 0; i < callbacks.length; i++) {
   40               Callback callback = callbacks[i];
   41               if (callback instanceof NameCallback) {
   42                   NameCallback nc = (NameCallback) callback;
   43                   nc.setName(username);
   44               } else if (callback instanceof PasswordCallback) {
   45                   PasswordCallback pc = (PasswordCallback) callback;
   46                   pc.setPassword(password);
   47               } else {
   48                   throw new UnsupportedCallbackException(callback);
   49               }
   50           }
   51       }
   52   
   53       public void clear() {
   54           Arrays.fill(password, '\0');
   55       }
   56   }

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