def __init__(self, key='phqgmeaylnofdxkrcvszwbuti', period=5):
self.key = [k.upper() for k in key]
self.pb = PolybiusSquare(self.key, size=5)
self.period = period
assert len(
key
) == 25, 'invalid key in init: must have length 25, has length ' + str(
len(key))
assert period >= 1, 'invalid period in init: period should be >= 1'
def decipher(self, string):
"""Decipher string using ADFGX cipher according to initialised key information. Punctuation and whitespace
are removed from the input.
Example::
plaintext = ADFGX('phqgmeaylnofdxkrcvszwbuti','HELLO').decipher(ciphertext)
:param string: The string to decipher.
:returns: The enciphered string.
"""
step2 = ColTrans(self.keyword).decipher(string)
step1 = PolybiusSquare(self.key, size=5, chars='ADFGX').decipher(step2)
return step1
def encipher(self, string):
"""Encipher string using ADFGVX cipher according to initialised key information. Punctuation and whitespace
are removed from the input.
Example::
ciphertext = ADFGVX('ph0qg64mea1yl2nofdxkr3cvs5zw7bj9uti8','HELLO').encipher(plaintext)
:param string: The string to encipher.
:returns: The enciphered string.
"""
step1 = PolybiusSquare(self.key, size=6,
chars='ADFGVX').encipher(string)
step2 = ColTrans(self.keyword).encipher(step1)
return step2
