org.bitpedia.util

Class TigerTree

java.lang.Object

java.security.MessageDigestSpi

java.security.MessageDigest

org.bitpedia.util.TigerTree

public class TigerTree
extends java.security.MessageDigest

Implementation of THEX tree hash algorithm, with Tiger as the internal algorithm (using the approach as revised in December 2002, to add unique prefixes to leaf and node operations) Uses a running stack of interim hashes to be space-efficient.

Constructor Summary

Constructors

Constructor and Description
TigerTree() Constructor

Method Summary

Modifier and Type	Method and Description
protected void	blockUpdate() Update the internal state with a single block of size 1024 (or less, in final block) from the internal buffer.
java.lang.Object	clone() Method overrides MessageDigest.clone()
protected void	composeNodes()
protected byte[]	engineDigest()
protected int	engineDigest(byte[] buf, int offset, int len)
protected int	engineGetDigestLength()
protected void	engineReset()
protected void	engineUpdate(byte in)
protected void	engineUpdate(byte[] in, int offset, int length)

Methods inherited from class java.security.MessageDigest

digest, digest, digest, getAlgorithm, getDigestLength, getInstance, getInstance, getInstance, getProvider, isEqual, reset, toString, update, update, update, update

Methods inherited from class java.security.MessageDigestSpi

engineUpdate

Methods inherited from class java.lang.Object

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

Constructor Detail

TigerTree

public TigerTree()

Constructor

Method Detail

engineGetDigestLength

protected int engineGetDigestLength()

Overrides:

engineGetDigestLength in class java.security.MessageDigestSpi

engineUpdate

protected void engineUpdate(byte in)

Specified by:

engineUpdate in class java.security.MessageDigestSpi

engineUpdate

protected void engineUpdate(byte[] in,
                            int offset,
                            int length)

Specified by:

engineUpdate in class java.security.MessageDigestSpi

engineDigest

protected byte[] engineDigest()

Specified by:

engineDigest in class java.security.MessageDigestSpi

engineDigest

protected int engineDigest(byte[] buf,
                           int offset,
                           int len)
                    throws java.security.DigestException

Overrides:

engineDigest in class java.security.MessageDigestSpi

Throws:

java.security.DigestException

engineReset

protected void engineReset()

Specified by:

engineReset in class java.security.MessageDigestSpi

clone

public java.lang.Object clone()
                       throws java.lang.CloneNotSupportedException

Method overrides MessageDigest.clone()

Overrides:

clone in class java.security.MessageDigest

Throws:

java.lang.CloneNotSupportedException

See Also:

MessageDigest.clone()

blockUpdate

protected void blockUpdate()

Update the internal state with a single block of size 1024 (or less, in final block) from the internal buffer.

composeNodes

protected void composeNodes()