DESEngine (Bouncy Castle Library 1.60 API Specification)

java.lang.Object
- org.bouncycastle.crypto.engines.DESEngine

All Implemented Interfaces:

BlockCipher

Direct Known Subclasses:

DESedeEngine
```
public class DESEngine
extends java.lang.Object
implements BlockCipher
```
a class that provides a basic DES engine.

Field Summary

Fields
Modifier and Type Field Description

protected static int BLOCK_SIZE

Fields
Modifier and Type	Field	Description
`protected static int`	`BLOCK_SIZE`

Constructor Summary

Constructors
Constructor Description

DESEngine()
standard constructor.

Constructors
Constructor	Description
`DESEngine()`	standard constructor.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`protected void`	`desFunc(int[] wKey, byte[] in, int inOff, byte[] out, int outOff)`	the DES engine.
`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.
`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 DES 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 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
  - DESEngine
```
public DESEngine()
```
    standard constructor.
- Method Detail
  - init
```
public void init(boolean encrypting,
                 CipherParameters params)
```
    initialise a DES cipher.
    
    Specified by:
    
    init in interface BlockCipher
    
    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
    
    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
    
    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
    
    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
  - 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!).
  - desFunc
```
protected void desFunc(int[] wKey,
                       byte[] in,
                       int inOff,
                       byte[] out,
                       int outOff)
```
    the DES engine.

Class DESEngine

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

BLOCK_SIZE

Constructor Detail

DESEngine

Method Detail

init

getAlgorithmName

getBlockSize

processBlock

reset

generateWorkingKey

desFunc