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63 lines
2.0 KiB
Python
63 lines
2.0 KiB
Python
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# @author https://github.com/theadeyemiolayinka
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from statistics import mode
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class Caesar():
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def __init__(self):
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self.LETTERS = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'
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self.translated = ''
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def __crypt(self, mode):
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for symbol in self.message.upper():
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if symbol in self.LETTERS:
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num = self.LETTERS.find(symbol)
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if mode == 'encrypt':
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num = num + self.key
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elif mode == 'decrypt':
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num = num - self.key
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if num >= len(self.LETTERS):
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num = num - len(self.LETTERS)
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elif num < 0:
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num = num + len(self.LETTERS)
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self.translated = self.translated + self.LETTERS[num]
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else:
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self.translated = self.translated + symbol
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return self.translated
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def encrypt(self, message, key=0):
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self.translated = ''
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self.key = key
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self.message = message
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return self.__crypt('encrypt')
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def decrypt(self, message, key=0):
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self.translated = ''
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self.key = key
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self.message = message
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return self.__crypt('decrypt')
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def invokeCipher(cipher, key, text, e_mode):
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if e_mode == 'E' or e_mode == 'e':
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print('\n====================RESULT====================')
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return cipher.encrypt(text, key)
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elif e_mode == 'D' or e_mode == 'd':
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print('\n====================RESULT====================')
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return cipher.decrypt(text, key)
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else:
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print('Ivalid mode.')
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n_mode = str(input("Enter mode: [E] for encryption and [D] for decryption:\n>"))
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return invokeCipher(cipher, key, text, n_mode)
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cipher = Caesar()
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key = int(input('Enter encryption key:\n>'))
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text = str(input('Enter text:\n>'))
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e_mode = str(input("Enter mode: [E] for encryption and [D] for decryption:\n>"))
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print(invokeCipher(cipher, key, text, e_mode))
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print('==============================================')
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