iaik.security.md
Class SHA64bit

java.lang.Object
  |
  +--java.security.MessageDigestSpi
        |
        +--java.security.MessageDigest
              |
              +--iaik.security.md.AbstractMessageDigest
                    |
                    +--iaik.security.md.SHA64bit

All Implemented Interfaces:

Cloneable

Direct Known Subclasses:

SHA384, SHA512

public abstract class SHA64bit

extends iaik.security.md.AbstractMessageDigest

This class implements the core of the NIST proposed 64 bit based hash function SHA-384 and SHA-512.

Version:

File Revision 16

See Also:

SHA384, SHA512

Method Summary

Object	clone() Returns a clone of this SHA 64-bit Object.
protected byte[]	engineDigest() b>SPI: Completes the hash computation by performing final operations such as padding.
int	engineGetDigestLength() SPI: Returns the length of the digest in bytes.
void	engineReset() SPI: Resets this message digest for further use.
protected void	engineUpdate(byte input) SPI: Updates the data to be hashed with the specified byte.
protected void	engineUpdate(byte[] input, int offset, int len) SPI: Updates the data to be hashed with the specified number of bytes, beginning at the specified offset within the given byte array.

Methods inherited from class java.security.MessageDigest

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

Methods inherited from class java.security.MessageDigestSpi

engineDigest

Methods inherited from class java.lang.Object

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

Method Detail

clone

public Object clone()

Returns a clone of this SHA 64-bit Object.

Overrides:

clone in class iaik.security.md.AbstractMessageDigest

Returns:

a clone of this SHA 64-bit Object

engineReset

public void engineReset()

Description copied from class: iaik.security.md.AbstractMessageDigest

SPI: Resets this message digest for further use.

Overrides:

engineReset in class iaik.security.md.AbstractMessageDigest

engineUpdate

protected final void engineUpdate(byte input)

SPI: Updates the data to be hashed with the specified byte.

Overrides:

engineUpdate in class MessageDigestSpi

Parameters:

input - the byte to be used for updating.

engineUpdate

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

SPI: Updates the data to be hashed with the specified number of bytes, beginning at the specified offset within the given byte array.

Overrides:

engineUpdate in class MessageDigestSpi

Parameters:

input - the byte array holding the data to be used for this update operation.

offset - the offset, indicating the start position within the given byte array.

len - the number of bytes to be obtained from the given byte array, starting at the given position.

engineDigest

protected byte[] engineDigest()

b>SPI: Completes the hash computation by performing final operations such as padding. Once engineDigest has been called, the engine should be reset. Resetting is the responsibility of the engine implementor.

Overrides:

engineDigest in class MessageDigestSpi

Returns:

The computed hash value.

See Also:

AbstractMessageDigest.engineReset()

engineGetDigestLength

public int engineGetDigestLength()

SPI: Returns the length of the digest in bytes.

May not be available for applications before JDK versions >= 1.2.x.

Overrides:

engineGetDigestLength in class MessageDigestSpi

Returns:

the length of the digest in bytes.