com.safenetinc.luna.provider.digest

Class Sha512

java.lang.Object

java.security.MessageDigestSpi

java.security.MessageDigest

com.safenetinc.luna.provider.digest.BaseHash

com.safenetinc.luna.provider.digest.Sha512

All Implemented Interfaces:

java.lang.Cloneable

public class Sha512
extends BaseHash

Implementation of SHA2-3 [SHA-512] per the IETF Draft Specification.

References:

1. Descriptions of SHA-256, SHA-384, and SHA-512,
2. http://csrc.nist.gov/cryptval/shs/sha256-384-512.pdf

Version:

$Revision: 1.7 $

Field Summary

Fields inherited from class com.safenetinc.luna.provider.digest.BaseHash

blockSize, buffer, count, hashSize

Constructor Summary

Constructors

Constructor and Description
Sha512() Trivial 0-arguments constructor.

Method Summary

Methods

Modifier and Type	Method and Description
java.lang.Object	clone()
static long[]	G(long hh0, long hh1, long hh2, long hh3, long hh4, long hh5, long hh6, long hh7, byte[] in, int offset)
protected byte[]	getResult() Constructs the result from the contents of the current context.
protected byte[]	padBuffer() Returns the byte array to use as padding before completing a hash operation.
protected void	resetContext() Resets the instance for future re-use.
protected void	transform(byte[] in, int offset) The block digest transformation per se.

Methods inherited from class com.safenetinc.luna.provider.digest.BaseHash

engineDigest, engineGetDigestLength, engineReset, engineUpdate, engineUpdate

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, engineUpdate

Methods inherited from class java.lang.Object

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

Constructor Detail

Sha512

public Sha512()

Trivial 0-arguments constructor.

Method Detail

G

public static final long[] G(long hh0,
       long hh1,
       long hh2,
       long hh3,
       long hh4,
       long hh5,
       long hh6,
       long hh7,
       byte[] in,
       int offset)

clone

public java.lang.Object clone()

Specified by:

clone in class BaseHash

transform

protected void transform(byte[] in,
             int offset)

Description copied from class: BaseHash

The block digest transformation per se.

Specified by:

transform in class BaseHash

Parameters:

in - the blockSize long block, as an array of bytes to digest.

offset - the index where the data to digest is located within the input buffer.

padBuffer

protected byte[] padBuffer()

Description copied from class: BaseHash

Returns the byte array to use as padding before completing a hash operation.

Specified by:

padBuffer in class BaseHash

Returns:

the bytes to pad the remaining bytes in the buffer before completing a hash operation.

getResult

protected byte[] getResult()

Description copied from class: BaseHash

Constructs the result from the contents of the current context.

Specified by:

getResult in class BaseHash

Returns:

the output of the completed hash operation.

resetContext

protected void resetContext()

Description copied from class: BaseHash

Resets the instance for future re-use.

Specified by:

resetContext in class BaseHash