def freA(s, small):
count = Counter(s) #would make a dictioary
ac = sum(count[l] for l in string.ascii_letters + ' ')
if ((ac * 100 / small) >= 80):
pc = sum(count[l] for l in string.punctuation)
if ((pc * 100 / small) <= 10):
freq = {
'e': 12.49,
't': 9.28,
'a': 8.04,
'o': 7.64,
'i': 7.57,
'n': 7.23,
's': 6.51,
'r': 6.28,
'h': 5.05,
'l': 4.07,
'd': 3.28,
'c': 3.34,
'u': 2.73,
'm': 2.51,
'f': 2.40,
'p': 2.14,
'g': 1.87,
'w': 1.68,
'y': 1.66,
'b': 1.48,
'v': 1.05,
'k': 0.54,
'x': 0.23,
'j': 0.16,
'q': 0.12,
'z': 0.09
}
fc = sum(count[l] for l in freq)
return fc
else:
return 1
def encrypt(plaintext, key, mode, iv):
if mode == AES.MODE_CBC:
assert iv != None
block = list(ord(b) for b in iv)
cipher = AES.new(key, AES.MODE_ECB)
plaintext = bytearray(plaintext)
plaintext = [
plaintext[i:i + AES.block_size]
for i in range(0, len(plaintext), AES.block_size)
]
ciphertext = [iv]
for i in range(len(plaintext)):
block = [(x ^ y) for (x, y) in zip(plaintext[i], block)]
block = "".join(chr(b) for b in block)
block = cipher.encrypt(block)
ciphertext.append(block)
return ciphertext
elif mode == AES.MODE_CTR:
cipher = AES.new(key, AES.MODE_ECB)
counter = Counter(iv)
plaintext = bytearray(plaintext)
plaintext = [
plaintext[i:i + AES.block_size]
for i in range(0, len(plaintext), AES.block_size)
]
ciphertext = [iv]
for i in range(len(plaintext)):
block = cipher.encrypt(str(counter))
counter.increment()
block = list(ord(b) for b in block)
block = [(x ^ y) for (x, y) in zip(plaintext[i], block)]
ciphertext.append(block)
return ciphertext
def convert_to_dict_representation(reviews):
all_reviews = []
for review in reviews:
all_reviews.append(Counter(review))
return all_reviews
def decrypt(self, enc):
cipher_ctr = AES.new(self.skey,
mode=AES.MODE_CTR,
counter=Counter(nonce))
return cipher_ctr.decrypt(enc)
def generate(self):
cipher_ctr = AES.new(self.skey,
mode=AES.MODE_CTR,
counter=Counter(nonce))
return cipher_ctr.encrypt(plaintext)
