Package com.trilead.ssh2.crypto.cipher

Class DES

java.lang.Object
com.trilead.ssh2.crypto.cipher.DES
All Implemented Interfaces:
BlockCipher
Direct Known Subclasses:
DESede
public class DES
extends Object
implements BlockCipher
DES.
Version:
$Id: DES.java,v 1.1 2007/10/15 12:49:55 cplattne Exp $
Author:
See comments in the source file

  • Constructor Summary

    Constructors 
    Constructor Description
    DES()
    standard constructor.

  • Method Summary

    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, int off)
    generate an integer based working key based on our secret key and what we processing we are planning to do.
    String getAlgorithmName()  
    int getBlockSize()  
    void init​(boolean encrypting, byte[] key)
    initialise a DES cipher.
    void reset()  
    void transformBlock​(byte[] in, int inOff, byte[] out, int outOff)  

    Methods inherited from class java.lang.Object

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

  • Constructor Details

    • DES

      public DES()
      standard constructor.

  • Method Details

    • init

      public void init​(boolean encrypting, byte[] key)
      initialise a DES cipher.
      Specified by:
      init in interface BlockCipher
      Parameters:
      encrypting - whether or not we are for encryption.
      key - the parameters required to set up the cipher.
      Throws:
      IllegalArgumentException - if the params argument is inappropriate.

    • getAlgorithmName

      public String getAlgorithmName()

    • getBlockSize

      public int getBlockSize()
      Specified by:
      getBlockSize in interface BlockCipher

    • transformBlock

      public void transformBlock​(byte[] in, int inOff, byte[] out, int outOff)
      Specified by:
      transformBlock in interface BlockCipher

    • reset

      public void reset()

    • generateWorkingKey

      protected int[] generateWorkingKey​(boolean encrypting, byte[] key, int off)
      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!).

      Parameters:
      encrypting - the encrypting
      key - the key
      off - the off
      Returns:
      the int [ ]

    • desFunc

      protected void desFunc​(int[] wKey, byte[] in, int inOff, byte[] out, int outOff)
      the DES engine.
      Parameters:
      wKey - the w key
      in - the in
      inOff - the in off
      out - the out
      outOff - the out off