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1: /* 2: * SaslCallbackHandler.java 3: * Copyright (C) 2002 The Free Software Foundation 4: * 5: * This file is part of GNU inetlib, a library. 6: * 7: * GNU inetlib is free software; you can redistribute it and/or modify 8: * it under the terms of the GNU General Public License as published by 9: * the Free Software Foundation; either version 2 of the License, or 10: * (at your option) any later version. 11: * 12: * GNU inetlib is distributed in the hope that it will be useful, 13: * but WITHOUT ANY WARRANTY; without even the implied warranty of 14: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15: * GNU General Public License for more details. 16: * 17: * You should have received a copy of the GNU General Public License 18: * along with this library; if not, write to the Free Software 19: * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 20: * 21: * Linking this library statically or dynamically with other modules is 22: * making a combined work based on this library. Thus, the terms and 23: * conditions of the GNU General Public License cover the whole 24: * combination. 25: * 26: * As a special exception, the copyright holders of this library give you 27: * permission to link this library with independent modules to produce an 28: * executable, regardless of the license terms of these independent 29: * modules, and to copy and distribute the resulting executable under 30: * terms of your choice, provided that you also meet, for each linked 31: * independent module, the terms and conditions of the license of that 32: * module. An independent module is a module which is not derived from 33: * or based on this library. If you modify this library, you may extend 34: * this exception to your version of the library, but you are not 35: * obliged to do so. If you do not wish to do so, delete this 36: * exception statement from your version. 37: */ 38: 39: package gnu.inet.util; 40: 41: import java.io.IOException; 42: 43: import javax.security.auth.callback.Callback; 44: import javax.security.auth.callback.CallbackHandler; 45: import javax.security.auth.callback.NameCallback; 46: import javax.security.auth.callback.PasswordCallback; 47: import javax.security.auth.callback.UnsupportedCallbackException; 48: 49: /** 50: * A callback handler that can manage username and password callbacks. 51: * 52: * @author <a href="mailto:dog@gnu.org">Chris Burdess</a> 53: */ 54: public final class SaslCallbackHandler 55: implements CallbackHandler 56: { 57: 58: /* 59: * The username. 60: */ 61: private final String username; 62: 63: /* 64: * The password. 65: */ 66: private final String password; 67: 68: /** 69: * Constructor. 70: * @param username the value to respond to Name callbacks with 71: * @param password the value to respond to Password callbacks with 72: */ 73: public SaslCallbackHandler(String username, String password) 74: { 75: this.username = username; 76: this.password = password; 77: } 78: 79: /** 80: * Handle callbacks. 81: */ 82: public void handle(Callback[] callbacks) 83: throws IOException, UnsupportedCallbackException 84: { 85: for (int i = 0; i < callbacks.length; i++) 86: { 87: if (callbacks[i] instanceof NameCallback) 88: { 89: NameCallback nc = (NameCallback) callbacks[i]; 90: nc.setName(username); 91: } 92: else if (callbacks[i] instanceof PasswordCallback) 93: { 94: PasswordCallback pc = (PasswordCallback) callbacks[i]; 95: pc.setPassword(password.toCharArray ()); 96: } 97: else 98: { 99: throw new UnsupportedCallbackException(callbacks[i]); 100: } 101: } 102: } 103: 104: }