1. import random
2. import math as floor
3.  
4.  
5. def genKys(length):
6.     length *= 8
7.     key = [0] * length
8.     choice = floor.floor(random.random() * length)
9.     for i in range(choice):
10.         key[floor.floor(random.random() * (length - 1))] = 1
11.     return key
12.  
13.  
14. def enc(plain, key):
15.     length = len(key)
16.     cipher = [None] * length
17.     for i in range(length):
18.         cipher[i] = 1 if key[i] == plain[i] else 0
19.     return cipher
20.  
21.  
22. def getBts(plain):
23.     length = len(plain)
24.     bits = [None] * length * 8
25.     for i in range(length):
26.         for j in range(8):
27.             bits[8 * i + 7 - j] = (int)(ord(plain[i]) / pow(2, j)) % 2
28.     return bits
29.  
30. def getBytes(bits):
31.     length = len(bits)
32.     data = []
33.     byte = 0
34.     for i in range((int)(length / 8)):
35.         for j in range(8):
36.             byte += pow(2, 7 - j) * bits[8 * i + j]
37.         data.append(byte)
38.         byte = 0
39.     return data
40.  
41. def toString(bytes):
42.     size = len(bytes)
43.     output = ""
44.     for i in range(size):
45.         output += chr(bytes[i])
46.     return output
47.