org.bouncycastle.crypto.macs

Class SipHash128

java.lang.Object

org.bouncycastle.crypto.macs.SipHash

org.bouncycastle.crypto.macs.SipHash128

All Implemented Interfaces:

Mac

public class SipHash128
extends SipHash

Implementation of SipHash with 128 bit output.

Based on the SipHash and the C reference implementation https://github.com/veorq/SipHash.

Field Summary

Fields inherited from class org.bouncycastle.crypto.macs.SipHash

c, d, k0, k1, m, v0, v1, v2, v3, wordCount, wordPos

Constructor Summary

Constructors

Constructor and Description
SipHash128() SipHash128-2-4
SipHash128(int c, int d) SipHash128-c-d

Method Summary

Modifier and Type	Method and Description
long	doFinal()
int	doFinal(byte[] out, int outOff) Compute the final stage of the MAC writing the output to the out parameter.
java.lang.String	getAlgorithmName() Return the name of the algorithm the MAC implements.
int	getMacSize() Return the block size for this MAC (in bytes).
void	reset() Reset the MAC.

Methods inherited from class org.bouncycastle.crypto.macs.SipHash

applySipRounds, init, processMessageWord, rotateLeft, update, update

Methods inherited from class java.lang.Object

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

Constructor Detail

SipHash128

public SipHash128()

SipHash128-2-4

SipHash128

public SipHash128(int c,
                  int d)

SipHash128-c-d

Parameters:

c - the number of compression rounds

d - the number of finalization rounds

Method Detail

getAlgorithmName

public java.lang.String getAlgorithmName()

Description copied from interface: Mac

Return the name of the algorithm the MAC implements.

Specified by:

getAlgorithmName in interface Mac

Overrides:

getAlgorithmName in class SipHash

Returns:

the name of the algorithm the MAC implements.

getMacSize

public int getMacSize()

Description copied from interface: Mac

Return the block size for this MAC (in bytes).

Specified by:

getMacSize in interface Mac

Overrides:

getMacSize in class SipHash

Returns:

the block size for this MAC in bytes.

doFinal

public long doFinal()
             throws DataLengthException,
                    java.lang.IllegalStateException

Overrides:

doFinal in class SipHash

Throws:

DataLengthException

java.lang.IllegalStateException

doFinal

public int doFinal(byte[] out,
                   int outOff)
            throws DataLengthException,
                   java.lang.IllegalStateException

Description copied from interface: Mac

Compute the final stage of the MAC writing the output to the out parameter.

doFinal leaves the MAC in the same state it was after the last init.

Specified by:

doFinal in interface Mac

Overrides:

doFinal in class SipHash

Parameters:

out - the array the MAC is to be output to.

outOff - the offset into the out buffer the output is to start at.

Throws:

DataLengthException - if there isn't enough space in out.

java.lang.IllegalStateException - if the MAC is not initialised.

reset

public void reset()

Description copied from interface: Mac

Reset the MAC. At the end of resetting the MAC should be in the in the same state it was after the last init (if there was one).

Specified by:

reset in interface Mac

Overrides:

reset in class SipHash