Bouncy Castle Cryptography 1.11 API Specification: Class DESedeEngine
Bouncy Castle Cryptography 1.11

org.bouncycastle.crypto.engines
Class DESedeEngine

java.lang.Object
  |
  +--org.bouncycastle.crypto.engines.DESEngine
        |
        +--org.bouncycastle.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
protected static int BLOCK_SIZE
           
 
Constructor Summary
DESedeEngine()
          standard constructor.
 
Method Summary
 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.bouncycastle.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
Constructor Detail

DESedeEngine

public DESedeEngine()
standard constructor.
Method Detail

init

public void init(boolean encrypting,
                 CipherParameters params)
initialise a DESede cipher.
Overrides:
init in class DESEngine
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.

getAlgorithmName

public java.lang.String getAlgorithmName()
Description copied from interface: BlockCipher
Return the name of the algorithm the cipher implements.
Overrides:
getAlgorithmName in class DESEngine
Following copied from interface: org.bouncycastle.crypto.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).
Overrides:
getBlockSize in class DESEngine
Following copied from interface: org.bouncycastle.crypto.BlockCipher
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.
Overrides:
processBlock in class DESEngine
Following copied from interface: org.bouncycastle.crypto.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.
Throws:
DataLengthException - if there isn't enough data in in, or space in out.
java.lang.IllegalStateException - if the cipher isn't initialised.

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).
Overrides:
reset in class DESEngine

Bouncy Castle Cryptography 1.11