def decrypt(self, ciphertext, key):
plaintext = ''
numKey = []
self.generateLetterMatrix()
ciphertext = cv.textToNum(ciphertext)
numKey = cv.textToNum(key)
counter = 0
#za svaki znak u šifratu
for cipherletter in ciphertext:
if (counter >= len(key)):
counter = 0
#pronađi slovo koje uz ključ indeksira polje vigenereovog kvadrata
#čiji je element odgovarajući znak šifrata.
for letter in self.alphabet:
if (cipherletter == self.alphabet.index(self.letter_matrix[
self.alphabet.index(letter)][numKey[counter]])):
plaintext += letter
counter += 1
return plaintext
def autokeyDecrypt(self, ciphertext, key):
plaintext = ''
numKey = []
self.generateLetterMatrix()
ciphertext = cv.textToNum(ciphertext)
numKey = cv.textToNum(key)
counter = 0
for index in numKey:
for letter in self.alphabet:
if (ciphertext[counter] == self.alphabet.index(
self.letter_matrix[self.alphabet.index(letter)][index])
):
plaintext += letter
counter += 1
position = counter
counter = 0
while (position < len(ciphertext)):
for letter in self.alphabet:
if (ciphertext[position] == self.alphabet.index(
self.letter_matrix[self.alphabet.index(letter)][
self.alphabet.index(plaintext[counter])])):
plaintext += letter
position += 1
counter += 1
return plaintext
def encrypt(self, plaintext, key):
ciphertext = ''
numKey = []
self.generateLetterMatrix()
plaintext = cv.textToNum(plaintext)
numKey = cv.textToNum(key)
counter = 0
for letter in plaintext:
if (counter >= len(key)):
counter = 0
ciphertext += self.letter_matrix[letter][numKey[counter]]
counter += 1
return ciphertext
def encrypt(self, plaintext, key):
ciphertext = []
plaintext = plaintext.lower()
plaintext = cv.textToNum(plaintext)
for letter in plaintext:
ciphertext.append((letter + key) % 26)
return cv.numToText(ciphertext)
def decrypt(self, ciphertext, key):
plaintext = []
ciphertext = ciphertext.lower()
ciphertext = cv.textToNum(ciphertext)
for letter in ciphertext:
plaintext.append((letter - key) % 26)
return cv.numToText(plaintext)
def bruteForce(self, ciphertext):
plaintext = []
buffer = []
ciphertext = cv.textToNum(ciphertext)
for key in range(1,26):
for letter in ciphertext:
buffer.append((letter - key) % 26)
plaintext.append(buffer)
buffer = []
return cv.numArrayToText(plaintext)
def autokeyEncrypt(self, plaintext, key):
ciphertext = ''
numKey = []
self.generateLetterMatrix()
plaintext = cv.textToNum(plaintext)
numKey = cv.textToNum(key)
counter = 0
for letter in numKey:
ciphertext += self.letter_matrix[plaintext[counter]][letter]
counter += 1
position = counter
counter = 0
while (position < len(plaintext)):
ciphertext += self.letter_matrix[plaintext[position]][
plaintext[counter]]
counter += 1
position += 1
return ciphertext
def encrypt(self, plaintext):
ciphertext = []
result = []
key = []
#pretvori tekst u polje brojeva u rasponu 0-25
plaintext = cv.textToNum(plaintext)
#za svaku vrijednost otvorenog teksta dodaj pseudonasumican broj u rasponu 0-25
for value in range(len(plaintext)):
key.append(rand.randrange(0, 26))
#modularno zborji otvoreni tekst i kljuc
ciphertext = self.modularAddition(plaintext, key)
ciphertext = cv.numToText(ciphertext)
result.append(ciphertext)
result.append(cv.numToText(key))
return result
def encrypt(self, plaintext, key, m=3):
self.key = key
ciphertext = ''
letter_vector = []
buffer = []
#pretvori otvoreni tekst u niz brojeva
plaintext = cv.textToNum(plaintext)
plaintext = self.padPlaintext(plaintext, m)
for value in plaintext:
buffer.append(value)
#Stvori 2D polje koje se sastoji od m-elementnih polja
if (len(buffer) == m):
letter_vector.append(buffer)
buffer = []
ciphertext = self.calculateCipher(letter_vector, m)
return ciphertext