Package org.bouncycastle.crypto.digests

Class SparkleDigest

java.lang.Object

org.bouncycastle.crypto.digests.SparkleDigest

All Implemented Interfaces:

Digest, ExtendedDigest

public class SparkleDigest
extends Object

Sparkle v1.2, based on the current round 3 submission, https://sparkle-lwc.github.io/ Reference C implementation: https://github.com/cryptolu/sparkle Specification: https://csrc.nist.gov/CSRC/media/Projects/lightweight-cryptography/documents/finalist-round/updated-spec-doc/sparkle-spec-final.pdf

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	SparkleDigest.Friend
static enum	SparkleDigest.SparkleParameters

Field Summary

Fields

Modifier and Type	Field	Description
protected String	algorithmName
protected int	BlockSize
protected int	DigestSize
protected byte[]	m_buf
protected int	m_bufPos
protected org.bouncycastle.crypto.digests.BufferBaseDigest.ProcessingBuffer	processor

Constructor Summary

Constructors

Constructor	Description
SparkleDigest(SparkleDigest.SparkleParameters sparkleParameters)

Method Summary

Modifier and Type	Method	Description
int	doFinal(byte[] output, int outOff)	close the digest, producing the final digest value.
protected void	ensureSufficientInputBuffer(byte[] input, int inOff, int len)
protected void	ensureSufficientOutputBuffer(byte[] output, int outOff)
protected void	finish(byte[] output, int outOff)
String	getAlgorithmName()	return the algorithm name
int	getByteLength()	Return the size in bytes of the internal buffer the digest applies it's compression function to.
int	getDigestSize()	return the size, in bytes, of the digest produced by this message digest.
protected void	processBytes(byte[] input, int inOff)
void	reset()	reset the digest back to it's initial state.
void	update(byte in)	update the message digest with a single byte.
void	update(byte[] input, int inOff, int len)	update the message digest with a block of bytes.

Methods inherited from class java.lang.Object

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

Field Details

DigestSize

protected int DigestSize

BlockSize

protected int BlockSize

m_buf

protected byte[] m_buf

m_bufPos

protected int m_bufPos

algorithmName

protected String algorithmName

processor

protected org.bouncycastle.crypto.digests.BufferBaseDigest.ProcessingBuffer processor

Constructor Details

SparkleDigest

public SparkleDigest(SparkleDigest.SparkleParameters sparkleParameters)

Method Details

processBytes

protected void processBytes(byte[] input,
 int inOff)

finish

protected void finish(byte[] output,
 int outOff)

reset

public void reset()

Description copied from interface: Digest

reset the digest back to it's initial state.

Specified by:

reset in interface Digest

getAlgorithmName

public String getAlgorithmName()

Description copied from interface: Digest

return the algorithm name

Specified by:

getAlgorithmName in interface Digest

Returns:

the algorithm name

getDigestSize

public int getDigestSize()

Description copied from interface: Digest

return the size, in bytes, of the digest produced by this message digest.

Specified by:

getDigestSize in interface Digest

Returns:

the size, in bytes, of the digest produced by this message digest.

getByteLength

public int getByteLength()

Description copied from interface: ExtendedDigest

Return the size in bytes of the internal buffer the digest applies it's compression function to.

Specified by:

getByteLength in interface ExtendedDigest

Returns:

byte length of the digests internal buffer.

update

public void update(byte in)

Description copied from interface: Digest

update the message digest with a single byte.

Specified by:

update in interface Digest

Parameters:

in - the input byte to be entered.

update

public void update(byte[] input,
 int inOff,
 int len)

Description copied from interface: Digest

update the message digest with a block of bytes.

Specified by:

update in interface Digest

Parameters:

input - the byte array containing the data.

inOff - the offset into the byte array where the data starts.

len - the length of the data.

doFinal

public int doFinal(byte[] output,
 int outOff)

Description copied from interface: Digest

close the digest, producing the final digest value. The doFinal call leaves the digest reset.

Specified by:

doFinal in interface Digest

Parameters:

output - the array the digest is to be copied into.

outOff - the offset into the out array the digest is to start at.

ensureSufficientInputBuffer

protected void ensureSufficientInputBuffer(byte[] input,
 int inOff,
 int len)

ensureSufficientOutputBuffer

protected void ensureSufficientOutputBuffer(byte[] output,
 int outOff)