Package com.trilead.ssh2.crypto.cipher

Class DES

  • All Implemented Interfaces:
    BlockCipher
    Direct Known Subclasses:
    DESede
    public class DES
extends java.lang.Object
implements BlockCipher
    DES.

    • Constructor Summary

      Constructors 
      Constructor Description
      DES()
      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, int off)
      generate an integer based working key based on our secret key and what we processing we are planning to do.
      java.lang.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 Detail

      • DES

        public DES()
        standard constructor.

    • Method Detail

      • 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:
        java.lang.IllegalArgumentException - if the params argument is inappropriate.

      • getAlgorithmName

        public java.lang.String getAlgorithmName()

      • 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!).

      • desFunc

        protected void desFunc​(int[] wKey,
                       byte[] in,
                       int inOff,
                       byte[] out,
                       int outOff)
        the DES engine.