hcrypto.engines
Class VigenereKey

java.lang.Object
  hcrypto.cipher.HistoricalKey
      hcrypto.engines.VigenereKey

public class VigenereKey
extends HistoricalKey

Represents a key for a Vigenere cipher. The key is entirely represented by a keyword String composed of characters from the chosen alphabet.

For this implementation of Vigenere cipher any of the alphabet ranges can be used.

See also:

ViegenerEngine
Alphabet

Field Summary

static java.lang.String	DEFAULT_KEY_DESCRIPTOR_PROMPT_STRING A keyword description.
static java.lang.String	DEFAULT_KEYWORD_STRING A default keyword.

Constructor Summary

VigenereKey()

Method Summary

java.lang.String	getAlgorithm() Returns the name of the algorithm "Vigenere".
void	init(java.lang.String keyspec) Initializes the VigenereKey with the specified keyspec.
void	init(java.lang.String keyword, Alphabet alpha1, Alphabet alpha2) Initializes the VigenereKey given a keyword and one or more alphabets.

Methods inherited from class hcrypto.cipher.HistoricalKey

getAlphabet, getBlocksize, getCipherKey, getCTAlphabet, getInstance, getKeyDescriptorPrompt, getKeyword, getPlainKey, initKey, initKey, invertKey, printAlphabets, removeDuplicateChars

Methods inherited from class java.lang.Object

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

Field Detail

DEFAULT_KEY_DESCRIPTOR_PROMPT_STRING

public static final java.lang.String DEFAULT_KEY_DESCRIPTOR_PROMPT_STRING

A keyword description.

See Also:

Constant Field Values

DEFAULT_KEYWORD_STRING

public static final java.lang.String DEFAULT_KEYWORD_STRING

A default keyword.

See Also:

Constant Field Values

Constructor Detail

VigenereKey

public VigenereKey()

Method Detail

init

public void init(java.lang.String keyspec)
          throws java.lang.Exception

Initializes the VigenereKey with the specified keyspec.

Specified by:

init in class HistoricalKey

Parameters:

keySpec - takes the form "keyword/alphabet", i.e. "76TrombonesLEDTHEBIGPARADE/azAZ09" for example, which would be mapped into the instance variables keyword as a String with the value of "76TrombonesLEDTHEBIGPARADE", and alphabet as a String with the value "azAZ09".

Throws:

java.lang.Exception

init

public void init(java.lang.String keyword,
                 Alphabet alpha1,
                 Alphabet alpha2)
          throws java.lang.Exception

Initializes the VigenereKey given a keyword and one or more alphabets.

Specified by:

init in class HistoricalKey

Parameters:

keyword - -- a string version of the keyword

alpha1, - alpha2 -- Alphabets for plain/ciphertext respectively. May be identical.

Throws:

java.lang.Exception

getAlgorithm

public java.lang.String getAlgorithm()

Returns the name of the algorithm "Vigenere".

Specified by:

getAlgorithm in class HistoricalKey