1. import random
2. import math as floor
3. from collections import Counter
4. import warnings
5. warnings.filterwarnings('ignore')
6. import matplotlib.pyplot as plot
7.  
8.  
9. def genKys(length):
10.     length *= 8
11.     key = [0] * length
12.     choice = int(floor.floor(random.random() * length))
13.     for i in range(choice):
14.         key[int(floor.floor(random.random()) * (length - 1))] = 1
15.     return key
16.  
17.  
18. def enc(plain, key):
19.     length = len(key)
20.     cipher = [None] * length
21.     for i in range(length):
22.         cipher[i] = 1 if key[i] == plain[i] else 0
23.     return cipher
24.  
25.  
26. def getBts(plain):
27.     length = len(plain)
28.     bits = [None] * length * 8
29.     for i in range(length):
30.         for j in range(8):
31.             bits[8 * i + 7 - j] = (int)(ord(plain[i]) / pow(2, j)) % 2
32.     return bits
33.  
34. def getBytes(bits):
35.     length = len(bits)
36.     data = []
37.     byte = 0
38.     for i in range((int)(length / 8)):
39.         for j in range(8):
40.             byte += pow(2, 7 - j) * bits[8 * i + j]
41.         data.append(byte)
42.         byte = 0
43.     return data
44.  
45. def toString(bytes):
46.     size = len(bytes)
47.     output = ""
48.     for i in range(size):
49.         output += chr(bytes[i])
50.     return output
51.  
52. def attack(i, key, size):
53.     if i == size - 1:
54.         dec(key)
55.         return
56.     for j in range(1, size - i):
57.         attack(i + j, key, size)
58.         key2 = key[:]
59.         key2[i + j] = 1
60.         attack(i + j, key2, size)
61.  
62. def dec(key):
63.     deciphered = enc(bits, key)
64.     txt = toString(getBytes(deciphered))
65.     if isLatin(txt):
66.         if txt == plainText:
67.           print("Found!")
68.           exit()
69.  
70. def isLatin(txt):
71.     size = len(txt)
72.     for i in range(size):
73.         if (ord(txt[i]) < 97) | (ord(txt[i]) > 122):
74.             return False
75.     return True