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Mar 20th, 2019
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  1. from random import choice
  2. from copy import copy
  3. import os
  4.  
  5. letters = ['а','б','в','г','д','е','ж','з','и','й','к','л','м','н','о','п','р','с','т','у','ф','х','ц','ч','ш','щ','ъ','ы','ь','э','ю','я',' ']
  6.  
  7. def generate_key():
  8. file = open("key.txt","a+")
  9. dup = copy(letters)
  10. for i in range(len(letters)):
  11. random_letter = choice(dup)
  12. file.write(letters[i] + random_letter + '\n')
  13. dup.remove(random_letter)
  14. file.close()
  15. return
  16.  
  17. def read_key():
  18. file = open("key.txt", "r")
  19. keys = file.read().split('\n')[:-1]
  20. return dict((key[0], key[1]) for key in keys)
  21.  
  22. def encryption():
  23. filename = input()
  24. keys = read_key()
  25. text = open(filename, "r").read()
  26. r = []
  27. for i in range(len(text.strip())):
  28. if text[i].lower() in letters:
  29. r.append(keys[text[i].lower()])
  30. else:
  31. r.append(text[i])
  32.  
  33. text = "".join(r)
  34. file = open("encrypted.txt","w+")
  35. file.write(text)
  36. file.close()
  37.  
  38. def get_key(val, my_dict):
  39. for key, value in my_dict.items():
  40. if val == value:
  41. return key
  42.  
  43.  
  44. return val
  45.  
  46. def decrypt():
  47. filename = input()
  48. if os.path.exists(filename):
  49. text = open(filename).read()
  50. keys = read_key()
  51. r = []
  52. for i in range(len(text.strip())):
  53. r.append(get_key(text[i], keys))
  54. text = "".join(r)
  55. print(text)
  56. file = open("decrypted.txt","w+")
  57. file.write(text)
  58. file.close()
  59. else:
  60. print("No encrypt file")
  61.  
  62. def main():
  63. command = input()
  64. if command == 'encrypt':
  65. generate_key()
  66. encryption()
  67. elif command == 'decrypt':
  68. decrypt()
  69. else:
  70. print('Wrong command name')
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