def test_rotor_mechanism_4(self):
reflector = Reflector(EnigmaSettings.get_reflectors()['B']) # A/B/C
rotor_1 = Rotor(EnigmaSettings.get_rotors()['I'], 'A') # I / II / III / IV / V
rotor_2 = Rotor(EnigmaSettings.get_rotors()['II'], 'A') # I / II / III / IV / V
rotor_3 = Rotor(EnigmaSettings.get_rotors()['III'], 'A') # I / II / III / IV / V
rotor_mechanism = RotorMechanism([rotor_3, rotor_2, rotor_1], reflector)
self.assertEqual('A', chr(rotor_mechanism.process(ord('B') - ord('A') + 1) - 1 + ord('A')))
self.assertEqual('A', chr(rotor_mechanism.process(ord('D') - ord('A') + 1) - 1 + ord('A')))
self.assertEqual('A', chr(rotor_mechanism.process(ord('Z') - ord('A') + 1) - 1 + ord('A')))
self.assertEqual('A', chr(rotor_mechanism.process(ord('G') - ord('A') + 1) - 1 + ord('A')))
self.assertEqual('A', chr(rotor_mechanism.process(ord('O') - ord('A') + 1) - 1 + ord('A')))
def set_rotor_mechanism(self, rotor_mechanism: RotorMechanism):
self.rotor_mechanism_encryption = rotor_mechanism
self.rotor_mechanism_decryption = rotor_mechanism.copy()
if self.key.size() != len(self.rotor_mechanism_encryption.rotors):
raise ValueError(
'Enigma_set_key: number of rotors must be equal to key length')
self.set_key(self.key)
def get_crypto(type: dict, settings: dict, *args) -> (Dict[str, dict], ICrypto):
type = CryptoMaker.get_type(type)
if type == 'enigma':
settings = CryptoMaker.get_settings(type, settings)
enigma_str_key, enigma_reflector, enigma_rotors, enigma_plugboard = settings['key'], settings['reflector'], settings['rotors'], settings['plug_board']
plug_board = PlugBoard(enigma_plugboard)
reflector = Reflector(EnigmaSettings.get_reflectors()[enigma_reflector]) # A/B/C
rotor_1 = Rotor(EnigmaSettings.get_rotors()[enigma_rotors['1']['type']],
enigma_rotors['1']['ring']) # I / II / III / IV / V
rotor_2 = Rotor(EnigmaSettings.get_rotors()[enigma_rotors['2']['type']],
enigma_rotors['2']['ring']) # I / II / III / IV / V
rotor_3 = Rotor(EnigmaSettings.get_rotors()[enigma_rotors['3']['type']],
enigma_rotors['3']['ring']) # I / II / III / IV / V
enigma_key = Key[str]()
for i, char in enumerate(enigma_str_key):
enigma_key.set_key(str(i), char)
rotor_mechanism = RotorMechanism([rotor_3, rotor_2, rotor_1], reflector)
return {type: dict(settings)}, Enigma(enigma_key, plug_board, rotor_mechanism)
elif type == 'caesar':
key_exchange: IKeyExchangeGenerator = args[0]
caesar_key = Key[int]({'key': key_exchange.get_key_exchange().get_k()})
key_exchange.set_crypto(Caesar(caesar_key))
else:
return None
def test_enigma_2(self):
plug_board = PlugBoard(['ab', 'ce'])
reflector = Reflector(EnigmaSettings.get_reflectors()['B']) # A/B/C
rotor_1 = Rotor(EnigmaSettings.get_rotors()['I'], 'A') # I / II / III / IV / V
rotor_2 = Rotor(EnigmaSettings.get_rotors()['II'], 'A') # I / II / III / IV / V
rotor_3 = Rotor(EnigmaSettings.get_rotors()['III'], 'A') # I / II / III / IV / V
rotor_mechanism = RotorMechanism([rotor_3, rotor_2, rotor_1], reflector)
enigma_key = Key()
enigma_key.set_key('I', 'D')
enigma_key.set_key('II', 'O')
enigma_key.set_key('III', 'G')
enigma = Enigma(enigma_key, plug_board, rotor_mechanism)
p_text = "ENIGMA"
c_text = enigma.encryption(p_text)
p_text_2 = enigma.decryption(c_text)
self.assertEqual(p_text, p_text_2)
def test_enigma_3(self):
plug_board = PlugBoard(['ab', 'ce'])
reflector = Reflector(EnigmaSettings.get_reflectors()['B']) # A/B/C
rotor_1 = Rotor(EnigmaSettings.get_rotors()['I'], 'A') # I / II / III / IV / V
rotor_2 = Rotor(EnigmaSettings.get_rotors()['II'], 'A') # I / II / III / IV / V
rotor_3 = Rotor(EnigmaSettings.get_rotors()['III'], 'A') # I / II / III / IV / V
rotor_mechanism = RotorMechanism([rotor_3, rotor_2, rotor_1], reflector)
enigma_key = Key()
enigma_key.set_key('I', 'D')
enigma_key.set_key('II', 'O')
enigma_key.set_key('III', 'G')
enigma = Enigma(enigma_key, plug_board, rotor_mechanism)
p_text = "3"
try:
c_text = enigma.encryption(p_text)
self.assertFalse(True)
except ValueError as ve:
self.assertEqual(str(ve), str(ValueError('EnigmaStatic_valid_character: unexpected character, enigma only supports A-Z characters')))
def test_cbc_mode_3(self):
pain_text = 'ABCC'
plug_board = PlugBoard(['ab', 'ce'])
reflector = Reflector(EnigmaSettings.get_reflectors()['B']) # A/B/C
rotor_1 = Rotor(EnigmaSettings.get_rotors()['III'], 'A') # I / II / III / IV / V
rotor_2 = Rotor(EnigmaSettings.get_rotors()['II'], 'A') # I / II / III / IV / V
rotor_3 = Rotor(EnigmaSettings.get_rotors()['III'], 'A') # I / II / III / IV / V
rotor_mechanism = RotorMechanism([rotor_3, rotor_2, rotor_1], reflector)
enigma_key = Key[str]()
enigma_key.set_key('I', 'D')
enigma_key.set_key('II', 'O')
enigma_key.set_key('III', 'G')
enigma = Enigma(enigma_key, plug_board, rotor_mechanism)
cbc_key = Key[str]()
cbc_key.set_key('cbc_key', '0SD')
cbc_mode = InverseCBCMode(enigma, cbc_key)
c_msg = cbc_mode.encryption(pain_text)
p_msg = cbc_mode.decryption(c_msg)
pain_text += (len(p_msg) - len(pain_text)) * 'F'
self.assertEqual(pain_text, p_msg)
def test_rotor_mechanism_2(self):
rotor_1 = Rotor(EnigmaSettings.get_rotors()['I'], 'A') #I / II / III / IV / V
rotor_2 = Rotor(EnigmaSettings.get_rotors()['II'], 'A') # I / II / III / IV / V
rotor_3 = Rotor(EnigmaSettings.get_rotors()['III'], 'A') # I / II / III / IV / V
rotor_mechanism = RotorMechanism([rotor_3, rotor_2, rotor_1], None)
try:
rotor_mechanism.process(25)
self.assertFalse(True)
except AttributeError as ae:
self.assertEqual(str(ae), str(AttributeError('\'NoneType\' object has no attribute \'wiring\'')))
try:
rotor_mechanism.process(225)
self.assertFalse(True)
except KeyError as ke:
self.assertTrue(True)
def write_text(self, text: str, rotor_mechanism: RotorMechanism) -> str:
if text is None: text = ''
after_text = ''
text = text.upper()
for character in text:
valid_character(character, True)
for character in text:
if self.plug_board is not None:
plug_board_character = self.plug_board.get_plug_char(character)
else:
plug_board_character = character
plug_board_num = az_to_index(plug_board_character) + 1
wheel_pack_num = rotor_mechanism.process(plug_board_num)
wheel_pack_character = index_to_az(wheel_pack_num - 1)
if self.plug_board is not None:
plug_board_character_2 = self.plug_board.get_plug_char(
wheel_pack_character)
else:
plug_board_character_2 = wheel_pack_character
after_text += plug_board_character_2
return after_text