001 /** 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. 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.security.realm.providers; 018 019 import java.util.Arrays; 020 import javax.security.auth.callback.Callback; 021 import javax.security.auth.callback.CallbackHandler; 022 import javax.security.auth.callback.NameCallback; 023 import javax.security.auth.callback.PasswordCallback; 024 import javax.security.auth.callback.UnsupportedCallbackException; 025 026 /** 027 * @version $Rev: 476049 $ $Date: 2006-11-16 23:35:17 -0500 (Thu, 16 Nov 2006) $ 028 */ 029 public class PasswordCallbackHandler implements ClearableCallbackHandler { 030 private final String username; 031 private final char[] password; 032 033 public PasswordCallbackHandler(String username, char[] password) { 034 this.username = username; 035 this.password = password; 036 } 037 038 public void handle(Callback[] callbacks) throws UnsupportedCallbackException { 039 for (int i = 0; i < callbacks.length; i++) { 040 Callback callback = callbacks[i]; 041 if (callback instanceof NameCallback) { 042 NameCallback nc = (NameCallback) callback; 043 nc.setName(username); 044 } else if (callback instanceof PasswordCallback) { 045 PasswordCallback pc = (PasswordCallback) callback; 046 pc.setPassword(password); 047 } else { 048 throw new UnsupportedCallbackException(callback); 049 } 050 } 051 } 052 053 public void clear() { 054 Arrays.fill(password, '\0'); 055 } 056 }