def main():
"""Menu display of available operations"""
print '\nWelcome! Please input a numbered option below\n'
print '1) Single encryption'
print '2) Multiple encryption (with random key generation)'
print '3) Single decryption'
print '4) Brute-force code breaking'
print '5) Quit\n'
main_choice = raw_input('> ')
if main_choice == '1':
return single_encryption_decryption('e')
elif main_choice == '2':
cipher_text = multiple_encryption()
return clipboard(cipher_text)
elif main_choice == '3':
return single_encryption_decryption('d')
elif main_choice == '4':
return code_break()
elif main_choice == '5' or main_choice.startswith('q'):
sys.exit()
else:
print 'Invalid choice'
return main()
def transposition(text='', option='', key=''):
"""Instantiate a CipherFuncs class for the Transposition cipher, obtaining all required parameters from the user
based off of what arguments were initially provided and how this method was called.
"""
transposition_cipher = CipherFuncs(text, option, key)
text, option, key = transposition_cipher.call_source()
cipher_text = encrypt_decrypt(text, option, key)
return clipboard(cipher_text)
def affine(text='', option='', key=''):
"""Instantiate a CipherFuncs class for the Affine cipher, obtaining all required parameters from the user
based off of what arguments were initially provided and how this method was called.
"""
affine_cipher = CipherFuncs(text, option, key)
text, option, key = affine_cipher.call_source()
key_a, key_b = compute_keys(key)
cipher_text = encrypt_decrypt(text, option, key_a, key_b)
return clipboard(cipher_text)