Package org.bouncycastle.crypto.digests

Class SHA3Digest

java.lang.Object

org.bouncycastle.crypto.digests.KeccakDigest

org.bouncycastle.crypto.digests.SHA3Digest

All Implemented Interfaces:

Digest, EncodableDigest, EncodableService, ExtendedDigest, SavableDigest, Memoable

public class SHA3Digest
extends KeccakDigest
implements SavableDigest

implementation of SHA-3 based on following KeccakNISTInterface.c from https://keccak.noekeon.org/

Following the naming conventions used in the C source code to enable easy review of the implementation.

Field Summary

Fields inherited from class org.bouncycastle.crypto.digests.KeccakDigest

bitsInQueue, dataQueue, fixedOutputLength, purpose, rate, squeezing, state

Constructor Summary

Constructors

Constructor	Description
SHA3Digest()
SHA3Digest(byte[] encodedState)
SHA3Digest(int bitLength)
SHA3Digest(int bitLength, CryptoServicePurpose purpose)
SHA3Digest(CryptoServicePurpose purpose)
SHA3Digest(SHA3Digest source)

Method Summary

Modifier and Type	Method	Description
Memoable	copy()	Produce a copy of this object with its configuration and in its current state.
int	doFinal(byte[] out, int outOff)	close the digest, producing the final digest value.
protected int	doFinal(byte[] out, int outOff, byte partialByte, int partialBits)
java.lang.String	getAlgorithmName()	return the algorithm name
byte[]	getEncodedState()	Return an encoded byte array for the digest's internal state
void	reset(Memoable other)	Restore a copied object state into this object.

Methods inherited from class org.bouncycastle.crypto.digests.KeccakDigest

absorb, absorb, absorbBits, copyIn, cryptoServiceProperties, getByteLength, getDigestSize, getEncodedState, reset, squeeze, update, update

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.bouncycastle.crypto.Digest

getDigestSize, reset, update, update

Methods inherited from interface org.bouncycastle.crypto.ExtendedDigest

getByteLength

Constructor Detail

SHA3Digest

public SHA3Digest()

SHA3Digest

public SHA3Digest(CryptoServicePurpose purpose)

SHA3Digest

public SHA3Digest(int bitLength)

SHA3Digest

public SHA3Digest(int bitLength,
                  CryptoServicePurpose purpose)

SHA3Digest

public SHA3Digest(byte[] encodedState)

SHA3Digest

public SHA3Digest(SHA3Digest source)

Method Detail

getAlgorithmName

public java.lang.String getAlgorithmName()

Description copied from interface: Digest

return the algorithm name

Specified by:

getAlgorithmName in interface Digest

Overrides:

getAlgorithmName in class KeccakDigest

Returns:

the algorithm name

doFinal

public int doFinal(byte[] out,
                   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

Overrides:

doFinal in class KeccakDigest

Parameters:

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

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

doFinal

protected int doFinal(byte[] out,
                      int outOff,
                      byte partialByte,
                      int partialBits)

Overrides:

doFinal in class KeccakDigest

getEncodedState

public byte[] getEncodedState()

Description copied from interface: EncodableDigest

Return an encoded byte array for the digest's internal state

Specified by:

getEncodedState in interface EncodableDigest

Specified by:

getEncodedState in interface EncodableService

Returns:

an encoding of the digests internal state.

copy

public Memoable copy()

Description copied from interface: Memoable

Produce a copy of this object with its configuration and in its current state.

The returned object may be used simply to store the state, or may be used as a similar object starting from the copied state.

Specified by:

copy in interface Memoable

reset

public void reset(Memoable other)

Description copied from interface: Memoable

Restore a copied object state into this object.

Implementations of this method should try to avoid or minimise memory allocation to perform the reset.

Specified by:

reset in interface Memoable

Parameters:

other - an object originally copied from an object of the same type as this instance.