com.ibm.crypto.fips.provider

Class FullHardwareSHA

java.lang.Object

java.security.MessageDigestSpi

com.ibm.crypto.fips.provider.FullHardwareSHA

All Implemented Interfaces:

java.lang.Cloneable

public final class FullHardwareSHA
extends java.security.MessageDigestSpi

Field Summary

Fields

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

Constructor Summary

Constructors

Constructor and Description
FullHardwareSHA() Standard constructor, creates a new SHA instance, allocates its buffers from the heap.

Method Summary

Methods

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 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.
protected byte[]	internalDigest()
protected int	internalDigest(byte[] buf, int offset, int len)
protected int	internalGetDigestBlockSize()
protected int	internalGetDigestLength() Return the digest length in bytes
protected void	internalReset()
protected void	internalUpdate(byte b) Update adds the passed byte to the digested data.
protected void	internalUpdate(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

FullHardwareSHA

public FullHardwareSHA()

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

Method Detail

engineGetDigestBlockSize

protected int engineGetDigestBlockSize()

internalGetDigestBlockSize

protected int internalGetDigestBlockSize()

engineReset

protected void engineReset()

Specified by:

engineReset in class java.security.MessageDigestSpi

internalReset

protected void internalReset()

engineGetDigestLength

protected int engineGetDigestLength()

Return the digest length in bytes

Overrides:

engineGetDigestLength in class java.security.MessageDigestSpi

internalGetDigestLength

protected int internalGetDigestLength()

Return the digest length in bytes

engineUpdate

protected void engineUpdate(byte b)

Update adds the passed byte to the digested data.

Specified by:

engineUpdate in class java.security.MessageDigestSpi

internalUpdate

protected void internalUpdate(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.

Specified by:

engineUpdate in class java.security.MessageDigestSpi

internalUpdate

protected void internalUpdate(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()

Specified by:

engineDigest in class java.security.MessageDigestSpi

internalDigest

protected byte[] internalDigest()

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

internalDigest

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

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)