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    1   /* DummyMessageDigest.java - Wrapper for MessageDigestSpi
    2      Copyright (C) 1999, 2002 Free Software Foundation, Inc.
    3   
    4   This file is 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, or (at your option)
    9   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; see the file COPYING.  If not, write to the
   18   Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
   19   02110-1301 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   package java.security;
   39   
   40   final class DummyMessageDigest extends MessageDigest
   41   {
   42     private MessageDigestSpi mdSpi = null;
   43   
   44     public DummyMessageDigest(MessageDigestSpi mdSpi, String algorithm)
   45     {
   46       super(algorithm);
   47       this.mdSpi = mdSpi;
   48     }
   49   
   50     public Object clone() throws CloneNotSupportedException
   51     {
   52       MessageDigest result = new DummyMessageDigest
   53           ((MessageDigestSpi) mdSpi.clone(), this.getAlgorithm());
   54       result.provider = this.getProvider();
   55       return result;
   56     }
   57   
   58     // java.security.MessageDigestSpi abstract methods implementation ---------
   59   
   60     public byte[] engineDigest()
   61     {
   62       return mdSpi.engineDigest();
   63     }
   64   
   65     public int engineDigest(byte[] buf, int offset, int len)
   66       throws DigestException
   67     {
   68       return mdSpi.engineDigest(buf, offset, len);
   69     }
   70   
   71     public int engineGetDigestLength()
   72     {
   73       return mdSpi.engineGetDigestLength();
   74     }
   75   
   76     public void engineReset()
   77     {
   78       mdSpi.engineReset();
   79     }
   80   
   81     public void engineUpdate(byte input)
   82     {
   83       mdSpi.engineUpdate(input);
   84     }
   85   
   86     public void engineUpdate(byte[] input, int offset, int len)
   87     {
   88       mdSpi.engineUpdate(input, offset, len);
   89     }
   90   }

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