Skip to content

HTTPS clone URL

Subversion checkout URL

You can clone with HTTPS or Subversion.

Download ZIP
tree: b36a8ab46f
Fetching contributors…

Cannot retrieve contributors at this time

60 lines (46 sloc) 2.121 kb
# Affine Cipher Hacker
# http://inventwithpython.com/hacking (BSD Licensed)
import pyperclip, affineCipher, detectEnglish, cryptomath
SILENT_MODE = False
def main():
# You might want to copy & paste this text from the source code at
# http://invpy.com/affineHacker.py
myMessage = """U&'<3dJ^Gjx'-3^MS'Sj0jxuj'G3'%j'<mMMjS'g{GjMMg9j{G'g"'gG'<3^MS'Sj<jguj'm'P^dm{'g{G3'%jMgjug{9'GPmG'gG'-m0'P^dm{LU'5&Mm{'_^xg{9"""
hackedMessage = hackAffine(myMessage)
if hackedMessage != None:
# The plaintext is displayed on the screen. For the convenience of
# the user, we copy the text of the code to the clipboard.
print('Copying hacked message to clipboard:')
print(hackedMessage)
pyperclip.copy(hackedMessage)
else:
print('Failed to hack encryption.')
def hackAffine(message):
print('Hacking...')
# Python programs can be stopped at any time by pressing Ctrl-C (on
# Windows) or Ctrl-D (on Mac and Linux)
print('(Press Ctrl-C or Ctrl-D to quit at any time.)')
# brute force by looping through every possible key
for key in range(len(affineCipher.SYMBOLS) ** 2):
keyA = affineCipher.getKeyParts(key)[0]
if cryptomath.gcd(keyA, len(affineCipher.SYMBOLS)) != 1:
continue
decryptedText = affineCipher.decryptMessage(key, message)
if not SILENT_MODE:
print('Tried Key %s... (%s)' % (key, decryptedText[:40]))
if detectEnglish.isEnglish(decryptedText):
# Check with the user if the decrypted key has been found.
print()
print('Possible encryption hack:')
print('Key: %s' % (key))
print('Decrypted message: ' + decryptedText[:200])
print()
print('Enter D for done, or just press Enter to continue hacking:')
response = input('> ')
if response.strip().upper().startswith('D'):
return decryptedText
return None
# If affineHacker.py is run (instead of imported as a module) call
# the main() function.
if __name__ == '__main__':
main()
Jump to Line
Something went wrong with that request. Please try again.