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/*
* Copyright (c) 2006-2011 Christian Plattner. All rights reserved.
* Please refer to the LICENSE.txt for licensing details.
*/
package ch.ethz.ssh2.crypto.digest;
import java.math.BigInteger;
/**
* HashForSSH2Types.
*
* @author Christian Plattner
* @version 2.50, 03/15/10
*/
public class HashForSSH2Types
{
Digest md;
public HashForSSH2Types(Digest md)
{
this.md = md;
}
public HashForSSH2Types(String type)
{
if (type.equals("SHA1"))
{
md = new SHA1();
}
else if (type.equals("MD5"))
{
md = new MD5();
}
else
throw new IllegalArgumentException("Unknown algorithm " + type);
}
public void updateByte(byte b)
{
/* HACK - to test it with J2ME */
byte[] tmp = new byte[1];
tmp[0] = b;
md.update(tmp);
}
public void updateBytes(byte[] b)
{
md.update(b);
}
public void updateUINT32(int v)
{
md.update((byte) (v >> 24));
md.update((byte) (v >> 16));
md.update((byte) (v >> 8));
md.update((byte) (v));
}
public void updateByteString(byte[] b)
{
updateUINT32(b.length);
updateBytes(b);
}
public void updateBigInt(BigInteger b)
{
updateByteString(b.toByteArray());
}
public void reset()
{
md.reset();
}
public int getDigestLength()
{
return md.getDigestLength();
}
public byte[] getDigest()
{
byte[] tmp = new byte[md.getDigestLength()];
getDigest(tmp);
return tmp;
}
public void getDigest(byte[] out)
{
getDigest(out, 0);
}
public void getDigest(byte[] out, int off)
{
md.digest(out, off);
}
}
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