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      1 /* **************************************************************************
      2  * $OpenLDAP: /com/novell/sasl/client/ResponseAuth.java,v 1.3 2005/01/17 15:00:54 sunilk Exp $
      3  *
      4  * Copyright (C) 2002 Novell, Inc. All Rights Reserved.
      5  *
      6  * THIS WORK IS SUBJECT TO U.S. AND INTERNATIONAL COPYRIGHT LAWS AND
      7  * TREATIES. USE, MODIFICATION, AND REDISTRIBUTION OF THIS WORK IS SUBJECT
      8  * TO VERSION 2.0.1 OF THE OPENLDAP PUBLIC LICENSE, A COPY OF WHICH IS
      9  * AVAILABLE AT HTTP://WWW.OPENLDAP.ORG/LICENSE.HTML OR IN THE FILE "LICENSE"
     10  * IN THE TOP-LEVEL DIRECTORY OF THE DISTRIBUTION. ANY USE OR EXPLOITATION
     11  * OF THIS WORK OTHER THAN AS AUTHORIZED IN VERSION 2.0.1 OF THE OPENLDAP
     12  * PUBLIC LICENSE, OR OTHER PRIOR WRITTEN CONSENT FROM NOVELL, COULD SUBJECT
     13  * THE PERPETRATOR TO CRIMINAL AND CIVIL LIABILITY.
     14  ******************************************************************************/
     15 package com.novell.sasl.client;
     16 
     17 import java.util.*;
     18 import org.apache.harmony.javax.security.sasl.*;
     19 
     20 /**
     21  * Implements the ResponseAuth class used by the DigestMD5SaslClient mechanism
     22  */
     23 class ResponseAuth
     24 {
     25 
     26     private String m_responseValue;
     27 
     28     ResponseAuth(
     29         byte[] responseAuth)
     30             throws SaslException
     31     {
     32         m_responseValue = null;
     33 
     34         DirectiveList dirList = new DirectiveList(responseAuth);
     35         try
     36         {
     37             dirList.parseDirectives();
     38             checkSemantics(dirList);
     39         }
     40         catch (SaslException e)
     41         {
     42         }
     43     }
     44 
     45     /**
     46      * Checks the semantics of the directives in the directive list as parsed
     47      * from the digest challenge byte array.
     48      *
     49      * @param dirList  the list of directives parsed from the digest challenge
     50      *
     51      * @exception SaslException   If a semantic error occurs
     52      */
     53     void checkSemantics(
     54         DirectiveList dirList) throws SaslException
     55     {
     56         Iterator        directives = dirList.getIterator();
     57         ParsedDirective directive;
     58         String          name;
     59 
     60         while (directives.hasNext())
     61         {
     62             directive = (ParsedDirective)directives.next();
     63             name = directive.getName();
     64             if (name.equals("rspauth"))
     65                 m_responseValue = directive.getValue();
     66         }
     67 
     68         /* post semantic check */
     69         if (m_responseValue == null)
     70             throw new SaslException("Missing response-auth directive.");
     71     }
     72 
     73     /**
     74      * returns the ResponseValue
     75      *
     76      * @return the ResponseValue as a String.
     77      */
     78     public String getResponseValue()
     79     {
     80         return m_responseValue;
     81     }
     82 }
     83 
     84