Source for gnu.javax.crypto.sasl.anonymous.AnonymousClient

   1: /* AnonymousClient.java --
   2:    Copyright (C) 2003, 2006 Free Software Foundation, Inc.
   3: 
   4: This file is a part of GNU Classpath.
   5: 
   6: GNU Classpath is free software; you can redistribute it and/or modify
   7: it under the terms of the GNU General Public License as published by
   8: the Free Software Foundation; either version 2 of the License, or (at
   9: your option) any later version.
  10: 
  11: GNU Classpath is distributed in the hope that it will be useful, but
  12: WITHOUT ANY WARRANTY; without even the implied warranty of
  13: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14: General Public License for more details.
  15: 
  16: You should have received a copy of the GNU General Public License
  17: along with GNU Classpath; if not, write to the Free Software
  18: Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301
  19: 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: obligated to do so.  If you do not wish to do so, delete this
  36: exception statement from your version.  */
  37: 
  38: 
  39: package gnu.javax.crypto.sasl.anonymous;
  40: 
  41: import gnu.java.security.Registry;
  42: import gnu.javax.crypto.sasl.ClientMechanism;
  43: import gnu.javax.crypto.sasl.IllegalMechanismStateException;
  44: 
  45: import java.io.UnsupportedEncodingException;
  46: 
  47: import javax.security.sasl.AuthenticationException;
  48: import javax.security.sasl.SaslClient;
  49: import javax.security.sasl.SaslException;
  50: 
  51: /**
  52:  * The ANONYMOUS client-side mechanism.
  53:  */
  54: public class AnonymousClient
  55:     extends ClientMechanism
  56:     implements SaslClient
  57: {
  58:   public AnonymousClient()
  59:   {
  60:     super(Registry.SASL_ANONYMOUS_MECHANISM);
  61:   }
  62: 
  63:   protected void initMechanism() throws SaslException
  64:   {
  65:   }
  66: 
  67:   protected void resetMechanism() throws SaslException
  68:   {
  69:   }
  70: 
  71:   public boolean hasInitialResponse()
  72:   {
  73:     return true;
  74:   }
  75: 
  76:   public byte[] evaluateChallenge(final byte[] challenge) throws SaslException
  77:   {
  78:     if (complete)
  79:       {
  80:         throw new IllegalMechanismStateException("evaluateChallenge()");
  81:       }
  82:     return response();
  83:   }
  84: 
  85:   private byte[] response() throws SaslException
  86:   {
  87:     if (! AnonymousUtil.isValidTraceInformation(authorizationID))
  88:       throw new AuthenticationException(
  89:           "Authorisation ID is not a valid email address");
  90:     complete = true;
  91:     final byte[] result;
  92:     try
  93:       {
  94:         result = authorizationID.getBytes("UTF-8");
  95:       }
  96:     catch (UnsupportedEncodingException x)
  97:       {
  98:         throw new AuthenticationException("response()", x);
  99:       }
 100:     return result;
 101:   }
 102: }