org.spongycastle.crypto.engines

Class DESedeEngine

java.lang.Object

org.spongycastle.crypto.engines.DESEngine

org.spongycastle.crypto.engines.DESedeEngine

All Implemented Interfaces:

BlockCipher

public class DESedeEngine
extends DESEngine

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

Field Summary

Fields

Modifier and Type	Field and Description
protected static int	BLOCK_SIZE

Constructor Summary

Constructors

Constructor and Description
DESedeEngine() standard constructor.

Method Summary

Modifier and Type	Method and Description
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 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.spongycastle.crypto.engines.DESEngine

desFunc, generateWorkingKey

Methods inherited from class java.lang.Object

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

Field Detail

BLOCK_SIZE

protected static final int BLOCK_SIZE

See Also:

Constant Field Values

Constructor Detail

DESedeEngine

public DESedeEngine()

standard constructor.

Method Detail

init

public void init(boolean encrypting,
                 CipherParameters params)

initialise a DESede cipher.

Specified by:

init in interface BlockCipher

Overrides:

init in class DESEngine

Parameters:

encrypting - 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.

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

Overrides:

getAlgorithmName in class DESEngine

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

Overrides:

getBlockSize in class DESEngine

Returns:

the block size for this cipher in bytes.

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

Overrides:

processBlock in class 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()

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

Overrides:

reset in class DESEngine