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// 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;
}
}
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