com.ibm.crypto.provider
Class SHA5

java.lang.Object
  java.security.MessageDigestSpi
      com.ibm.crypto.provider.SHA5

All Implemented Interfaces:

Cloneable

public final class SHA5

extends MessageDigestSpi

implements Cloneable

This class implements the Secure Hash Algorithm 5 (SHA-5) developed by the National Institute of Standards and Technology along with the National Security Agency.

Constructor Summary

SHA5()
Standard constructor, creates a new SHA5 instance, allocates its buffers from the heap.

Method Summary

Object	clone() Clones this object.
protected byte[]	engineDigest() Compute the final hash and reset the engine so that it is ready for re-use, as specifed by MessageDigest.
protected int	engineDigest(byte[] buf, int offset, int len) Compute the final hash and reset the engine so that it is ready for re-use, as specifed by MessageDigest.
protected int	engineGetDigestLength() Return the digest length in bytes
protected void	engineReset()
protected void	engineUpdate(byte b) Update adds the passed byte to the digested data.
protected void	engineUpdate(byte[] input, int offset, int len) Update adds the selected part of an array of bytes to the digest.
void	init() Initialize the SHA5 information

Methods inherited from class java.lang.Object

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

Constructor Detail

SHA5

public SHA5()

Standard constructor, creates a new SHA5 instance, allocates its buffers from the heap.

Method Detail

init

public void init()

Initialize the SHA5 information

engineReset

protected void engineReset()

engineGetDigestLength

protected int engineGetDigestLength()

Return the digest length in bytes

engineUpdate

protected void engineUpdate(byte b)

Update adds the passed byte to the digested data.

engineUpdate

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

Update adds the selected part of an array of bytes to the digest. This version is more efficient than the byte-at-a-time version; it avoids data copies and reduces per-byte call overhead.

engineDigest

protected byte[] engineDigest()

Compute the final hash and reset the engine so that it is ready for re-use, as specifed by MessageDigest.

engineDigest

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

Compute the final hash and reset the engine so that it is ready for re-use, as specifed by MessageDigest.

Throws:

DigestException

clone

public Object clone()

Clones this object.