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cryptix.jce.provider.cipher
Class RC6  

java.lang.Object
  javax.crypto.CipherSpi
      cryptix.jce.provider.cipher.BlockCipher
          cryptix.jce.provider.cipher.RC6

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public final class RC6

extends BlockCipher

Simple implementation of Ron Rivest's RC6 cipher. Use of this algorithm may be subject to licensing restrictions imposed by the RC6 inventor.

http://www.rsa.com/rsalabs/aes/

Version:

$Revision: 1.2 $

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Field Summary
private static int	BLOCK_SIZE           Number of rounds
private  boolean	decrypt           Encrypt (false) or decrypt mode (true)
private static int	P           Magic constants
private static int	Q           Magic constants
private static int	ROUNDS           Number of rounds
private  int[]	S           Subkeys

 

Fields inherited from class cryptix.jce.provider.cipher.BlockCipher

 

Constructor Summary

RC6()

 

Method Summary
protected  void	coreCrypt(byte[] in, int inOffset, byte[] out, int outOffset)           Encrypt or decrypt a single block (16 bytes), depending on the current mode and key.
protected  void	coreInit(java.security.Key key, boolean decrypt)
private  void	generateSubKeys(byte[] key)           Set encryption mode and key.
private static int	rotl(int val, int amount)           Rotate left.
private static int	rotr(int val, int amount)           Rotate right.

 

Methods inherited from class cryptix.jce.provider.cipher.BlockCipher

clone, coreGetBlockSize, engineDoFinal, engineDoFinal, engineGetBlockSize, engineGetIV, engineGetKeySize, engineGetOutputSize, engineGetParameters, engineInit, engineInit, engineInit, engineSetMode, engineSetPadding, engineUpdate, engineUpdate

 

Methods inherited from class javax.crypto.CipherSpi

engineDoFinal, engineUnwrap, engineUpdate, engineWrap

 

Methods inherited from class java.lang.Object

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

 

Field Detail

ROUNDS

private static final int ROUNDS

Number of rounds

See Also:

Constant Field Values

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BLOCK_SIZE

private static final int BLOCK_SIZE

Number of rounds

See Also:

Constant Field Values

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P

private static final int P

Magic constants

See Also:

Constant Field Values

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Q

private static final int Q

Magic constants

See Also:

Constant Field Values

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S

private int[] S

Subkeys

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decrypt

private boolean decrypt

Encrypt (false) or decrypt mode (true)

Constructor Detail

RC6

public RC6()

Method Detail

coreInit

protected void coreInit(java.security.Key key,
                        boolean decrypt)
                 throws java.security.InvalidKeyException

Specified by:

coreInit in class BlockCipher

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coreCrypt

protected final void coreCrypt(byte[] in,
                               int inOffset,
                               byte[] out,
                               int outOffset)

Encrypt or decrypt a single block (16 bytes), depending on the current mode and key. Input and output buffer may (partially) overlap. Expects valid parameters only.

Specified by:

coreCrypt in class BlockCipher

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generateSubKeys

private final void generateSubKeys(byte[] key)

Set encryption mode and key. Expects valid parameters only.

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rotl

private static int rotl(int val,
                        int amount)

Rotate left.

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rotr

private static int rotr(int val,
                        int amount)

Rotate right.

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