hcrypto.engines
Class RailfenceEngine

java.lang.Object
  hcrypto.cipher.CipherEngine
      hcrypto.cipher.BlockCipher
          hcrypto.engines.RailfenceEngine

public class RailfenceEngine
extends BlockCipher

Implements the Historical Railfence cipher.

Constructor Summary

RailfenceEngine()
Creates a RailFenceEngine and sets the alphabetRangeOptions instance variable to "111111", which translates to all six alphabet options for both the plaintext and ciphertext alphabets.

Method Summary

java.lang.String	engineDecode(java.lang.String cText) engineDecode()
java.lang.String	engineEncode(java.lang.String str) This abstract method must be implemented in the subclass to perform basic encrypting step for a given cipher algorithm.

Methods inherited from class hcrypto.cipher.CipherEngine

getAlphabetRangeOptions

Methods inherited from class java.lang.Object

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

Constructor Detail

RailfenceEngine

public RailfenceEngine()

Creates a RailFenceEngine and sets the alphabetRangeOptions instance variable to "111111", which translates to all six alphabet options for both the plaintext and ciphertext alphabets.

Method Detail

engineEncode

public java.lang.String engineEncode(java.lang.String str)
                              throws java.lang.Exception

Description copied from class: BlockCipher

This abstract method must be implemented in the subclass to perform basic encrypting step for a given cipher algorithm.

Throws:

java.lang.Exception

engineDecode

public java.lang.String engineDecode(java.lang.String cText)

engineDecode()

Parameters:

cText - is the entire cryptotext, which is assumed in this implementation to be some number of evenly-sized blocks of length blocksize