net.sourceforge.jtds.util

Class GeneralDigest

java.lang.Object

net.sourceforge.jtds.util.GeneralDigest

Direct Known Subclasses:

MD4Digest

public abstract class GeneralDigest
extends java.lang.Object

base implementation of MD4 family style digest as outlined in "Handbook of Applied Cryptography", pages 344 - 347.

Version:

$Id: GeneralDigest.java,v 1.2 2004-06-27 17:00:55 bheineman Exp $

Field Summary

Fields

Modifier and Type	Field and Description
private long	byteCount
private byte[]	xBuf
private int	xBufOff

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	GeneralDigest() Standard constructor
protected	GeneralDigest(GeneralDigest t) Copy constructor.

Method Summary

Methods

Modifier and Type	Method and Description
void	finish()
protected abstract void	processBlock()
protected abstract void	processLength(long bitLength)
protected abstract void	processWord(byte[] in, int inOff)
void	reset()
void	update(byte in)
void	update(byte[] in, int inOff, int len)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

xBuf

private byte[] xBuf

xBufOff

private int xBufOff

byteCount

private long byteCount

Constructor Detail

GeneralDigest

protected GeneralDigest()

Standard constructor

GeneralDigest

protected GeneralDigest(GeneralDigest t)

Copy constructor. We are using copy constructors in place of the Object.clone() interface as this interface is not supported by J2ME.

Method Detail

update

public void update(byte in)

update

public void update(byte[] in,
          int inOff,
          int len)

finish

public void finish()

reset

public void reset()

processWord

protected abstract void processWord(byte[] in,
               int inOff)

processLength

protected abstract void processLength(long bitLength)

processBlock

protected abstract void processBlock()