def decode(cipher: str, key: Union[int, str], input_file, output_file):
"""Use this command to decode the text (read from stdio or a file)
using the available ciphers and display the decrypted text or write
it to a file.
"""
input_file_name = input_file.name if input_file is not None else None
output_file_name = output_file.name if output_file is not None else None
io_handler = IOHandler(input_file_name, output_file_name)
input_text = io_handler.read()
if cipher == "caesar":
key = Caesar.check_key_type(key, int)
c = Caesar(key=key)
decrypted_str = c.decrypt(input_text)
if cipher == "vigenere":
v = Vigenere(key=key)
decrypted_str = v.decrypt(input_text)
if cipher == "vernam":
if input_file is None:
print(("An input file is required for the Vernam cipher"
" to work correctly. Exitting..."))
sys.exit()
vernam = Vernam(key=key)
decrypted_str = vernam.decrypt(input_text)
io_handler.write(decrypted_str)
class vigenereFrame(frameTemplate):
def __init__(self):
super().__init__()
self.vg = Vigenere()
self.initUI()
def initUI(self):
super().initUI()
self.definition.insertPlainText(vigenere_txt)
self.cb_method.addItem("Encrypt")
self.cb_method.addItem("Decrypt")
self.cb_method.currentIndexChanged.connect(self.selectionChange)
self.btn_encrypt.clicked.connect(self.encrypt)
self.label_key = QLabel()
self.label_key.setText('Ključ:')
self.key_input = QLineEdit(self)
regex = QtCore.QRegExp("^[a-zA-Z]+$")
validator = QtGui.QRegExpValidator(regex, self.key_input)
self.key_input.setValidator(validator)
text_validator = QtGui.QRegExpValidator(regex, self.plaintext)
self.plaintext.setValidator(validator)
self.checkbox_autokey = QCheckBox("Autokey")
self.checkbox_autokey.setChecked(False)
self.checkbox_autokey.stateChanged.connect(self.stateChange)
self.encryption_v_box.addWidget(self.label_key)
self.encryption_v_box.addWidget(self.key_input)
self.encryption_v_box.addWidget(self.checkbox_autokey)
def selectionChange(self, index):
if (self.cb_method.itemText(index) == "Encrypt"):
self.label_plaintext.setText("Plaintext:")
self.label_ciphertext.setText("Ciphertext:")
if(self.checkbox_autokey.isChecked()):
self.btn_encrypt.clicked.disconnect()
self.btn_encrypt.clicked.connect(self.autokeyEncrypt)
else:
self.btn_encrypt.clicked.disconnect()
self.btn_encrypt.clicked.connect(self.encrypt)
self.btn_encrypt.setText("Encrypt")
self.plaintext.clear()
self.ciphertext.clear()
elif (self.cb_method.itemText(index) == "Decrypt"):
self.label_plaintext.setText("Ciphertext:")
self.label_ciphertext.setText("Plaintext:")
if(self.checkbox_autokey.isChecked()):
self.btn_encrypt.clicked.disconnect()
self.btn_encrypt.clicked.connect(self.autokeyDecrypt)
else:
self.btn_encrypt.clicked.disconnect()
self.btn_encrypt.clicked.connect(self.decrypt)
self.btn_encrypt.setText("Decrypt")
self.plaintext.clear()
self.ciphertext.clear()
def stateChange(self):
self.btn_encrypt.clicked.disconnect()
if(self.checkbox_autokey.isChecked()):
if (str(self.cb_method.currentText()) == "Encrypt"):
self.btn_encrypt.clicked.connect(self.autokeyEncrypt)
else:
self.btn_encrypt.clicked.connect(self.autokeyDecrypt)
else:
if (str(self.cb_method.currentText()) == "Encrypt"):
self.btn_encrypt.clicked.connect(self.encrypt)
else:
self.btn_encrypt.clicked.connect(self.decrypt)
def encrypt(self):
if(self.validateKey()):
text = self.vg.encrypt(self.plaintext.text(), self.key_input.text())
self.ciphertext.setText(text)
self.key_input.setStyleSheet('QLineEdit { border-color: #1e1e1e }')
def decrypt(self):
if(self.validateKey()):
text = self.vg.decrypt(self.plaintext.text(), self.key_input.text())
self.ciphertext.setText(text)
self.key_input.setStyleSheet('QLineEdit { border-color: #1e1e1e }')
def autokeyEncrypt(self):
if(self.validateKey()):
text = self.vg.autokeyEncrypt(self.plaintext.text(), self.key_input.text())
self.ciphertext.setText(text)
self.key_input.setStyleSheet('QLineEdit { border-color: #1e1e1e }')
def validateKey(self):
if(self.key_input.text() == ''):
self.key_input.setPlaceholderText("Key is required")
self.key_input.setStyleSheet('QLineEdit { border-color: #EC0505 }')
return False
return True
def autokeyDecrypt(self):
if(self.validateKey()):
text = self.vg.autokeyDecrypt(self.plaintext.text(), self.key_input.text())
self.ciphertext.setText(text)
self.key_input.setStyleSheet('QLineEdit { border-color: #1e1e1e }')
# K2 from ciphers.vigenere import VigenereTableau, Vigenere kryptos_alphabet = "KRYPTOSABCDEFGHIJLMNQUVWXZ" vtableau = VigenereTableau(alphabet=kryptos_alphabet, row_fill=0, col_fill=4) cipher = Vigenere(tableau=vtableau) ciphertext = "VFPJUDEEHZWETZYVGWHKKQETGFQJNCEGGWHKK?DQMCPFQZDQMMIAGPFXHQRLGTIMVMZJANQLVKQEDAGDVFRPJUNGEUNAQZGZLECGYUXUEENJTBJLBQCRTBJDFHRRYIZETKZEMVDUFKSJHKFWHKUWQLSZFTIHHDDDUVH?DWKBFUFPWNTDFIYCUQZEREEVLDKFEZMOQQJLTTUGSYQPFEUNLAVIDXFLGGTEZ?FKZBSFDQVGOGIPUFXHHDRKFFHQNTGPUAECNUVPDJMQCLQUMUNEDFQELZZVRRGKFFVOEEXBDMVPNFQXEZLGREDNQFMPNZGLFLPMRJQYALMGNUVPDXVKPDQUMEBEDMHDAFMJGZNUPLGESWJLLAETG" keyword = "ABSCISSA" plaintext = cipher.decrypt(ciphertext, keyword) print "K2" print ciphertext print plaintext
def test_vigenere_algorithm_dec():
c = Vigenere(key="42")
assert c.decrypt("bcdø") == "PSRø"
def test_vigenere_algorithm_dec_enc(a):
c = Vigenere(key="42")
assert c.encrypt(c.decrypt(a)) == a