libjava/classpath/gnu/javax/crypto/sasl/anonymous/AnonymousClient.java

   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.SaslClient;
  48 import javax.security.sasl.SaslException;
  49 import javax.security.sasl.AuthenticationException;
  50
  51 /**
  52  * <p>The ANONYMOUS client-side mechanism.</p>
  53  */
  54 public class AnonymousClient extends ClientMechanism implements SaslClient
  55 {
  56
  57   // Constants and variables
  58   // -------------------------------------------------------------------------
  59
  60   // Constructor(s)
  61   // -------------------------------------------------------------------------
  62
  63   public AnonymousClient()
  64   {
  65     super(Registry.SASL_ANONYMOUS_MECHANISM);
  66   }
  67
  68   // Class methods
  69   // -------------------------------------------------------------------------
  70
  71   // Instance methods
  72   // -------------------------------------------------------------------------
  73
  74   // abstract methods implementation -----------------------------------------
  75
  76   protected void initMechanism() throws SaslException
  77   {
  78   }
  79
  80   protected void resetMechanism() throws SaslException
  81   {
  82   }
  83
  84   // javax.security.sasl.SaslClient interface implementation -----------------
  85
  86   public boolean hasInitialResponse()
  87   {
  88     return true;
  89   }
  90
  91   public byte[] evaluateChallenge(final byte[] challenge) throws SaslException
  92   {
  93     if (complete)
  94       {
  95         throw new IllegalMechanismStateException("evaluateChallenge()");
  96       }
  97     return response();
  98   }
  99
 100   private byte[] response() throws SaslException
 101   {
 102     if (!AnonymousUtil.isValidTraceInformation(authorizationID))
 103       {
 104         throw new AuthenticationException(
 105                                           "Authorisation ID is not a valid email address");
 106       }
 107     complete = true;
 108     //      return authorizationID.getBytes();
 109     final byte[] result;
 110     try
 111       {
 112         result = authorizationID.getBytes("UTF-8");
 113       }
 114     catch (UnsupportedEncodingException x)
 115       {
 116         throw new AuthenticationException("response()", x);
 117       }
 118     return result;
 119   }
 120 }