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1: /* 2: * SaslLogin.java 3: * Copyright (C) 2004 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.UnsupportedEncodingException; 42: import javax.security.sasl.SaslClient; 43: import javax.security.sasl.SaslException; 44: 45: /** 46: * SASL mechanism for LOGIN. 47: * 48: * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a> 49: */ 50: public class SaslLogin 51: implements SaslClient 52: { 53: 54: private static final int STATE_USERNAME = 0; 55: private static final int STATE_PASSWORD = 1; 56: private static final int STATE_COMPLETE = 2; 57: 58: private String username; 59: private String password; 60: private int state; 61: 62: public SaslLogin(String username, String password) 63: { 64: this.username = username; 65: this.password = password; 66: state = STATE_USERNAME; 67: } 68: 69: public String getMechanismName() 70: { 71: return "LOGIN"; 72: } 73: 74: public boolean hasInitialResponse() 75: { 76: return false; 77: } 78: 79: public byte[] evaluateChallenge(byte[] challenge) 80: throws SaslException 81: { 82: try 83: { 84: switch (state) 85: { 86: case STATE_USERNAME: 87: state = STATE_PASSWORD; 88: return username.getBytes("UTF-8"); 89: case STATE_PASSWORD: 90: state = STATE_COMPLETE; 91: return password.getBytes("UTF-8"); 92: default: 93: return new byte[0]; 94: } 95: } 96: catch (UnsupportedEncodingException e) 97: { 98: String msg = "The UTF-8 character set is not supported by the VM"; 99: throw new SaslException(msg, e); 100: } 101: } 102: 103: public boolean isComplete() 104: { 105: return (state == STATE_COMPLETE); 106: } 107: 108: public byte[] unwrap(byte[] incoming, int off, int len) 109: throws SaslException 110: { 111: byte[] ret = new byte[len - off]; 112: System.arraycopy(incoming, off, ret, 0, len); 113: return ret; 114: } 115: 116: public byte[] wrap(byte[] outgoing, int off, int len) 117: throws SaslException 118: { 119: byte[] ret = new byte[len - off]; 120: System.arraycopy(outgoing, off, ret, 0, len); 121: return ret; 122: } 123: 124: public Object getNegotiatedProperty(String name) 125: { 126: return null; 127: } 128: 129: public void dispose() 130: { 131: } 132: 133: }