com.ibm.crypto.hdwrCCA.provider

Class AbstractFullHardwareSHA

java.lang.Object

java.security.MessageDigestSpi

com.ibm.crypto.hdwrCCA.provider.AbstractFullHardwareSHA

All Implemented Interfaces:

java.lang.Cloneable

Direct Known Subclasses:

FullHardwareSHA, FullHardwareSHA224, FullHardwareSHA256, FullHardwareSHA384, FullHardwareSHA512

public abstract class AbstractFullHardwareSHA
extends java.security.MessageDigestSpi
implements java.lang.Cloneable

This class contains implementations of methods that are common to the SHA MessageDigest algorithms and abstract methods that behave differently from one SHA algorithm to another. It is implemented by the following: FullHardwareSHA FullHardwareSHA224 FullHardwareSHA256 FullHardwareSHA384 FullHardwareSHA512

Field Summary

Fields

Modifier and Type	Field and Description
protected java.lang.String	alg

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	AbstractFullHardwareSHA(java.lang.String algorithm, int sha_length, byte[] init_state)

Method Summary

Modifier and Type	Method and Description
java.lang.Object	clone() Clones this object.
protected byte[]	engineDigest()
protected int	engineDigest(byte[] buf, int offset, int len)
protected abstract int	engineGetDigestBlockSize()
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.
static boolean	isSupportedByHardware(java.lang.String algorithm)

Methods inherited from class java.security.MessageDigestSpi

engineUpdate

Methods inherited from class java.lang.Object

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

Field Detail

alg

protected java.lang.String alg

Constructor Detail

AbstractFullHardwareSHA

protected AbstractFullHardwareSHA(java.lang.String algorithm,
                                  int sha_length,
                                  byte[] init_state)

Method Detail

engineReset

protected void engineReset()

Specified by:

engineReset in class java.security.MessageDigestSpi

engineGetDigestLength

protected int engineGetDigestLength()

Return the digest length in bytes

Overrides:

engineGetDigestLength in class java.security.MessageDigestSpi

engineGetDigestBlockSize

protected abstract int engineGetDigestBlockSize()

engineUpdate

protected void engineUpdate(byte b)

Update adds the passed byte to the digested data.

Specified by:

engineUpdate in class java.security.MessageDigestSpi

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.

Specified by:

engineUpdate in class java.security.MessageDigestSpi

engineDigest

protected byte[] engineDigest()

Specified by:

engineDigest in class java.security.MessageDigestSpi

engineDigest

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

Overrides:

engineDigest in class java.security.MessageDigestSpi

Throws:

java.security.DigestException

clone

public java.lang.Object clone()

Clones this object.

Overrides:

clone in class java.security.MessageDigestSpi

isSupportedByHardware

public static boolean isSupportedByHardware(java.lang.String algorithm)