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/*
* SaslLogin.java
* Copyright (C) 2004 The Free Software Foundation
*
* This file is part of GNU inetlib, a library.
*
* GNU inetlib is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* GNU inetlib is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Linking this library statically or dynamically with other modules is
* making a combined work based on this library. Thus, the terms and
* conditions of the GNU General Public License cover the whole
* combination.
*
* As a special exception, the copyright holders of this library give you
* permission to link this library with independent modules to produce an
* executable, regardless of the license terms of these independent
* modules, and to copy and distribute the resulting executable under
* terms of your choice, provided that you also meet, for each linked
* independent module, the terms and conditions of the license of that
* module. An independent module is a module which is not derived from
* or based on this library. If you modify this library, you may extend
* this exception to your version of the library, but you are not
* obliged to do so. If you do not wish to do so, delete this
* exception statement from your version.
*/
package gnu.inet.util;
import java.io.UnsupportedEncodingException;
import javax.security.sasl.SaslClient;
import javax.security.sasl.SaslException;
/**
* SASL mechanism for LOGIN.
*
* @author <a href='mailto:dog@gnu.org'>Chris Burdess</a>
*/
public class SaslLogin
implements SaslClient
{
private static final int STATE_USERNAME = 0;
private static final int STATE_PASSWORD = 1;
private static final int STATE_COMPLETE = 2;
private String username;
private String password;
private int state;
public SaslLogin(String username, String password)
{
this.username = username;
this.password = password;
state = STATE_USERNAME;
}
public String getMechanismName()
{
return "LOGIN";
}
public boolean hasInitialResponse()
{
return false;
}
public byte[] evaluateChallenge(byte[] challenge)
throws SaslException
{
try
{
switch (state)
{
case STATE_USERNAME:
state = STATE_PASSWORD;
return username.getBytes("UTF-8");
case STATE_PASSWORD:
state = STATE_COMPLETE;
return password.getBytes("UTF-8");
default:
return new byte[0];
}
}
catch (UnsupportedEncodingException e)
{
String msg = "The UTF-8 character set is not supported by the VM";
throw new SaslException(msg, e);
}
}
public boolean isComplete()
{
return (state == STATE_COMPLETE);
}
public byte[] unwrap(byte[] incoming, int off, int len)
throws SaslException
{
byte[] ret = new byte[len - off];
System.arraycopy(incoming, off, ret, 0, len);
return ret;
}
public byte[] wrap(byte[] outgoing, int off, int len)
throws SaslException
{
byte[] ret = new byte[len - off];
System.arraycopy(outgoing, off, ret, 0, len);
return ret;
}
public Object getNegotiatedProperty(String name)
{
return null;
}
public void dispose()
{
}
}
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