27 lines
617 B
Python
Executable File
27 lines
617 B
Python
Executable File
#!/home/maxime/.pyvenv/bin/python3
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key = "CYLAB"
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with open("cipher.txt", 'r') as f:
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cipher = f.read()
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plaintext = ""
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i = 0
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for char in cipher:
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char = ord(char)
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a = ord('a')
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z = ord('z')
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A = ord('A')
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Z = ord('Z')
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keychar = ord(key[i%len(key)]) - A
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if a <= char and char <= z:
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plaintext += chr((char - a - keychar)%26 + a)
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i += 1
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elif A <= char and char <= Z:
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plaintext += chr((char - A - keychar)%26 + A)
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i += 1
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else:
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plaintext += chr(char)
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print(plaintext)
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