def preprocess(self):
# Preprocess text
text = self.text.lower()
text = general.sanitize(text)
self.text = [(ord(i) - const.LETTER) for i in text]
# Preprocess key
key = self.key.lower()
key = general.sanitize(key)
self.key = [(ord(i) - const.LETTER) for i in key]
def preprocess(self):
# Preprocess text
text = self.text.lower()
text = general.sanitize(text)
text = general.replace_char(text, 'j', 'i')
self.bigrams = create_bigram(text)
# Preprocess key
key = self.key.lower()
key = general.sanitize(key)
key += const.ALPHABET
key = general.remove_duplicate_char(key)
key = general.remove_char(key, 'j')
self.key = general.create_square(key, 5)
def preprocess(self):
# Preprocess text
# Done in encrypt and decrypt function for special purpose
# Preprocess key
key = self.key.lower()
key = general.sanitize(key)
self.key = [(ord(i)-const.LETTER) for i in key]
def preprocess(self):
# preprocess key
try:
key = json.loads(self.key)['key']
except KeyError as err:
raise Exception(f'required key {err}', 400)
except Exception as err:
raise Exception(err.args, 400)
key_length = len(key)
if not (is_square(key_length)):
raise Exception("length of key is not perfect square", 400)
key_sqrt = sqrt(key_length)
self.key = general.create_square(key, key_sqrt)
# preprocess text
text = self.text.lower()
text = general.sanitize(text)
self.ngrams = create_n_gram(self.text, key_sqrt)
def encrypt(self):
chiper_text = ''
#Preprocess text
text = self.text.lower()
text = general.sanitize(text)
self.text = [(ord(i)-const.LETTER) for i in text]
#Encrypt phase
vig = Vigenere(self.text,self.key).encrypt()
ord_vig = [(ord(i)-const.LETTER) for i in vig]
matrices = split_len(ord_vig,const.TRANSPOSEKEY)
transpose = np.transpose(matrices)
for row in transpose:
for col in row:
if(col != const.SENTINEL):
chiper_text += general.order_to_char(col)
else:
chiper_text += chr(col)
return chiper_text
def preprocess(self):
# Preprocess text
text = self.text.lower()
text = general.sanitize(text)
self.text = text
# Preprocess key
try:
key = json.loads(self.key)
except:
raise Exception("can't decode json key", 400)
try:
self.m = int(key['m'])
self.b = int(key['b'])
except ValueError as err:
raise Exception("key is not integer", 400)
except KeyError as err:
raise Exception(f'required key {err}', 400)
self.n = 26
if math.gcd(self.m, self.n) != 1:
raise Exception(f"{self.m} and {self.n} are not relatively prime",
400)
