Source for gnu.inet.util.SaslCallbackHandler

   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: }