org.bouncycastle.crypto.engines
Class DESEngine
java.lang.Object
org.bouncycastle.crypto.engines.DESEngine
- BlockCipher
public class DESEngine
extends java.lang.Object
a class that provides a basic DES engine.
protected void | desFunc(int[] wKey, byte[] in, int inOff, byte[] out, int outOff) - the DES engine.
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protected int[] | generateWorkingKey(boolean encrypting, byte[] key) - generate an integer based working key based on our secret key
and what we processing we are planning to do.
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String | getAlgorithmName() - Return the name of the algorithm the cipher implements.
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int | getBlockSize() - Return the block size for this cipher (in bytes).
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void | init(boolean encrypting, CipherParameters params) - initialise a DES cipher.
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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.
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void | reset() - Reset the cipher.
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BLOCK_SIZE
protected static final int BLOCK_SIZE
- 8
DESEngine
public DESEngine()
standard constructor.
desFunc
protected void desFunc(int[] wKey,
byte[] in,
int inOff,
byte[] out,
int outOff)
the DES engine.
generateWorkingKey
protected int[] generateWorkingKey(boolean encrypting,
byte[] key)
generate an integer based working key based on our secret key
and what we processing we are planning to do.
Acknowledgements for this routine go to James Gillogly & Phil Karn.
(whoever, and wherever they are!).
getAlgorithmName
public String getAlgorithmName()
Return the name of the algorithm the cipher implements.
- getAlgorithmName in interface BlockCipher
- the name of the algorithm the cipher implements.
getBlockSize
public int getBlockSize()
Return the block size for this cipher (in bytes).
- getBlockSize in interface BlockCipher
- the block size for this cipher in bytes.
init
public void init(boolean encrypting,
CipherParameters params)
initialise a DES cipher.
- init in interface BlockCipher
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.
- processBlock in interface BlockCipher
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.
- 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).
- reset in interface BlockCipher