cryptix.provider.md

Class MD4

java.lang.Object

java.security.MessageDigestSpi

java.security.MessageDigest

cryptix.provider.md.MD4

All Implemented Interfaces:

java.lang.Cloneable

public class MD4
extends java.security.MessageDigest
implements java.lang.Cloneable

Implements the MD4 message digest algorithm in Java.

References:

1. Ronald L. Rivest, " The MD4 Message-Digest Algorithm", IETF RFC-1320 (informational).

$Revision: 1.4 $

Author:

Raif S. Naffah

Constructor Summary

Constructors

Constructor and Description
MD4()

Method Summary

Modifier and Type	Method and Description
java.lang.Object	clone() Returns a copy of this MD object.
byte[]	engineDigest() Completes the hash computation by performing final operations such as padding.
void	engineReset() Resets this object disregarding any temporary data present at the time of the invocation of this call.
void	engineUpdate(byte b) Continues an MD4 message digest using the input byte.
void	engineUpdate(byte[] input, int offset, int len) MD4 block update operation.

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

engineDigest, engineGetDigestLength, engineUpdate

Methods inherited from class java.lang.Object

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

Constructor Detail

MD4

public MD4()

Method Detail

clone

public java.lang.Object clone()

Returns a copy of this MD object.

Overrides:

clone in class java.security.MessageDigest

engineReset

public void engineReset()

Resets this object disregarding any temporary data present at the time of the invocation of this call.

Specified by:

engineReset in class java.security.MessageDigestSpi

engineUpdate

public void engineUpdate(byte b)

Continues an MD4 message digest using the input byte.

Specified by:

engineUpdate in class java.security.MessageDigestSpi

engineUpdate

public void engineUpdate(byte[] input,
                         int offset,
                         int len)

MD4 block update operation.

Continues an MD4 message digest operation, by filling the buffer, transform(ing) data in 512-bit message block(s), updating the variables context and count, and leaving (buffering) the remaining bytes in buffer for the next update or finish.

Specified by:

engineUpdate in class java.security.MessageDigestSpi

Parameters:

input - input block

offset - start of meaningful bytes in input

len - count of bytes in input block to consider

engineDigest

public byte[] engineDigest()

Completes the hash computation by performing final operations such as padding. At the return of this engineDigest, the MD engine is reset.

Specified by:

engineDigest in class java.security.MessageDigestSpi

Returns:

the array of bytes for the resulting hash value.