gnu.crypto.hash

Class Sha256

Implemented Interfaces:
Cloneable, IMessageDigest

public class Sha256
extends BaseHash

Implementation of SHA2-1 [SHA-256] 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: 1.1 $

Field Summary

Fields inherited from class gnu.crypto.hash.BaseHash

blockSize, buffer, count, hashSize, name

Constructor Summary

Sha256()
Trivial 0-arguments constructor.

Method Summary

static int[]
G(int hh0, int hh1, int hh2, int hh3, int hh4, int hh5, int hh6, int hh7, byte[] in, int offset)
Object
clone()
protected byte[]
getResult()
protected byte[]
padBuffer()
protected void
resetContext()
boolean
selfTest()
protected void
transform(byte[] in, int offset)

Methods inherited from class gnu.crypto.hash.BaseHash

blockSize, clone, digest, getResult, hashSize, name, padBuffer, reset, resetContext, selfTest, transform, update, update

Constructor Details

Sha256

public Sha256()
Trivial 0-arguments constructor.

Method Details

G

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


clone

public Object clone()
Specified by:
clone in interface IMessageDigest
Overrides:
clone in interface BaseHash


getResult

protected byte[] getResult()
Overrides:
getResult in interface BaseHash


padBuffer

protected byte[] padBuffer()
Overrides:
padBuffer in interface BaseHash


resetContext

protected void resetContext()
Overrides:
resetContext in interface BaseHash


selfTest

public boolean selfTest()
Specified by:
selfTest in interface IMessageDigest
Overrides:
selfTest in interface BaseHash


transform

protected void transform(byte[] in,
                         int offset)
Overrides:
transform in interface BaseHash


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