org.bouncycastle.crypto.engines

Class RC564Engine

Implemented Interfaces:
BlockCipher

public class RC564Engine
extends java.lang.Object
implements BlockCipher

The specification for RC5 came from the RC5 Encryption Algorithm publication in RSA CryptoBytes, Spring of 1995. http://www.rsasecurity.com/rsalabs/cryptobytes.

This implementation is set to work with a 64 bit word size.

Implementation courtesy of Tito Pena.

Constructor Summary

RC564Engine()
Create an instance of the RC5 encryption algorithm and set some defaults

Method Summary

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 a RC5-64 cipher.
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.

Constructor Details

RC564Engine

public RC564Engine()
Create an instance of the RC5 encryption algorithm and set some defaults

Method Details

getAlgorithmName

public String getAlgorithmName()
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()
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 a RC5-64 cipher.
Specified by:
init in interface BlockCipher
Parameters:
forEncryption - whether or not we are for encryption.
params - the parameters required to set up the cipher.

processBlock

public 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.
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()
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