Subversion Repositories scarts

// SimpleSHSStream.java

/* Copyright (C) 2000  Free Software Foundation

   This file is part of libgcj.

This software is copyrighted work licensed under the terms of the

Libgcj License.  Please consult the file "LIBGCJ_LICENSE" for

details.  */

package gnu.gcj.io;

import java.io.Serializable;

import java.io.*;

import java.lang.reflect.*;

public class SimpleSHSStream extends java.io.DataOutputStream

{

  int counter;

  final int SHS_BLOCKSIZE = 64;

  final int SHS_DIGESTSIZE = 20;

  byte buf[];

  byte shs_info[];

  native static byte [] shsFinal (byte info[]);

  native static void shsUpdate (byte info[], byte buf[], int count);

  native static byte [] shsInit ();

  private void update (byte b)

  {

    buf [counter++] = b;

    if (counter % SHS_BLOCKSIZE == 0)

      {

        counter = 0;

        shsUpdate (shs_info, buf, SHS_BLOCKSIZE);

      }

  }

  public void write (int b) throws IOException

  {

    update ((byte)b);

    super.write (b);

  }

  public void write (byte[] b, int off, int len) throws IOException

  {

    for (int i = 0; i < len; i++)

      write (b[i+off]);

  }

  public byte[] digest()

  {

    shsUpdate (shs_info, buf, counter);

    return shsFinal (shs_info);

  }

  public SimpleSHSStream (OutputStream out)

  {

    super (out);

    buf = new byte[SHS_BLOCKSIZE];

    shs_info = shsInit ();

    counter = 0;

  }

}