org.bouncycastle.crypto.engines
Class NoekeonEngine

java.lang.Object
  org.bouncycastle.crypto.engines.NoekeonEngine

All Implemented Interfaces:

BlockCipher

public class NoekeonEngine
extends java.lang.Object
implements BlockCipher

A Noekeon engine, using direct-key mode.

Field Summary

private boolean	_forEncryption
private boolean	_initialised
private int[]	decryptKeys
private static int	genericSize
private static int[]	nullVector
private static int[]	roundConstants
private int[]	state
private int[]	subKeys

Constructor Summary

NoekeonEngine()
Create an instance of the Noekeon encryption algorithm and set some defaults

Method Summary

private int	bytesToIntBig(byte[] in, int off)
private int	decryptBlock(byte[] in, int inOff, byte[] out, int outOff)
private int	encryptBlock(byte[] in, int inOff, byte[] out, int outOff)
private void	gamma(int[] a)
java.lang.String	getAlgorithmName() Return the name of the algorithm the cipher implements.
int	getBlockSize() Return the block size for this cipher (in bytes).
void	init(boolean forEncryption, CipherParameters params) initialise
private void	intToBytesBig(int x, byte[] out, int off)
private void	pi1(int[] a)
private void	pi2(int[] a)
int	processBlock(byte[] in, int inOff, byte[] out, int outOff) Process one block of input from the array in and write it to the out array.
void	reset() Reset the cipher.
private int	rotl(int x, int y)
private void	setKey(byte[] key) Re-key the cipher.
private void	theta(int[] a, int[] k)

Methods inherited from class java.lang.Object

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

Field Detail

genericSize

private static final int genericSize

See Also:

Constant Field Values

nullVector

private static final int[] nullVector

roundConstants

private static final int[] roundConstants

state

private int[] state

subKeys

private int[] subKeys

decryptKeys

private int[] decryptKeys

_initialised

private boolean _initialised

_forEncryption

private boolean _forEncryption

Constructor Detail

NoekeonEngine

public NoekeonEngine()

Create an instance of the Noekeon encryption algorithm and set some defaults

Method Detail

getAlgorithmName

public java.lang.String getAlgorithmName()

Description copied from interface: BlockCipher

Return the name of the algorithm the cipher implements.

Specified by:

getAlgorithmName in interface BlockCipher

Returns:

the name of the algorithm the cipher implements.

getBlockSize

public int getBlockSize()

Description copied from interface: BlockCipher

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

Specified by:

getBlockSize in interface BlockCipher

Returns:

the block size for this cipher in bytes.

init

public void init(boolean forEncryption,
                 CipherParameters params)

initialise

Specified by:

init in interface BlockCipher

Parameters:

forEncryption - whether or not we are for encryption.

params - the parameters required to set up the cipher.

Throws:

java.lang.IllegalArgumentException - if the params argument is inappropriate.

processBlock

public int processBlock(byte[] in,
                        int inOff,
                        byte[] out,
                        int outOff)

Description copied from interface: BlockCipher

Process one block of input from the array in and write it to the out array.

Specified by:

processBlock in interface BlockCipher

Parameters:

in - the array containing the input data.

inOff - offset into the in array the data starts at.

out - the array the output data will be copied into.

outOff - the offset into the out array the output will start at.

Returns:

the number of bytes processed and produced.

reset

public void reset()

Description copied from interface: BlockCipher

Reset the cipher. After resetting the cipher is in the same state as it was after the last init (if there was one).

Specified by:

reset in interface BlockCipher

setKey

private void setKey(byte[] key)

Re-key the cipher.

Parameters:

key - the key to be used

encryptBlock

private int encryptBlock(byte[] in,
                         int inOff,
                         byte[] out,
                         int outOff)

decryptBlock

private int decryptBlock(byte[] in,
                         int inOff,
                         byte[] out,
                         int outOff)

gamma

private void gamma(int[] a)

theta

private void theta(int[] a,
                   int[] k)

pi1

private void pi1(int[] a)

pi2

private void pi2(int[] a)

bytesToIntBig

private int bytesToIntBig(byte[] in,
                          int off)

intToBytesBig

private void intToBytesBig(int x,
                           byte[] out,
                           int off)

rotl

private int rotl(int x,
                 int y)