31 lines
710 B
Python
Executable File
31 lines
710 B
Python
Executable File
#!/home/maxime/.pyvenv/bin/python3
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import string
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ALPHABET = string.ascii_lowercase[:16]
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def b16_decode(enc):
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dec = ''
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assert len(enc) % 2 == 0
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for i in range(0, len(enc), 2):
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char = 0
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msb = ord(enc[i]) - ord('a')
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lsb = ord(enc[i+1]) - ord('a')
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char += (msb << 4) + lsb
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dec += chr(char)
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return dec
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def decode(c, k):
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t1 = ord(c) - ord('a')
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t2 = ord(k) - ord('a')
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return ALPHABET[(t1 - t2) % len(ALPHABET)]
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with open("string", 'r') as f:
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text = f.read().strip()
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keyset = ALPHABET
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for key in keyset:
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decrypted = ''
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for char in text:
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decrypted += decode(char, key)
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print(b16_decode(decrypted))
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