org.bouncycastle.crypto.engines

Class DESedeEngine

Implemented Interfaces:
BlockCipher

public class DESedeEngine
extends DESEngine

a class that provides a basic DESede (or Triple DES) engine.

Field Summary

protected static int
BLOCK_SIZE

Fields inherited from class org.bouncycastle.crypto.engines.DESEngine

BLOCK_SIZE

Constructor Summary

DESedeEngine()
standard constructor.

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 encrypting, CipherParameters params)
initialise a DESede 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.

Methods inherited from class org.bouncycastle.crypto.engines.DESEngine

desFunc, generateWorkingKey, getAlgorithmName, getBlockSize, init, processBlock, reset

Field Details

BLOCK_SIZE

protected static final int BLOCK_SIZE
Field Value:
8

Constructor Details

DESedeEngine

public DESedeEngine()
standard constructor.

Method Details

getAlgorithmName

public String getAlgorithmName()
Return the name of the algorithm the cipher implements.
Specified by:
getAlgorithmName in interface BlockCipher
Overrides:
getAlgorithmName in interface DESEngine
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
Overrides:
getBlockSize in interface DESEngine
Returns:
the block size for this cipher in bytes.

init

public void init(boolean encrypting,
                 CipherParameters params)
initialise a DESede cipher.
Specified by:
init in interface BlockCipher
Overrides:
init in interface DESEngine
Parameters:
encrypting - 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
Overrides:
processBlock in interface DESEngine
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
Overrides:
reset in interface DESEngine