mirror of
https://github.com/osmarks/random-stuff
synced 2024-11-08 13:39:53 +00:00
22 lines
586 B
Python
22 lines
586 B
Python
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import string, re
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def entry(argv):
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argv = argv.encode("utf-8")
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modulus = len(argv) % 5
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if modulus > 0:
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argv += b"\x00" * (5-modulus)
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chars = string.ascii_uppercase + "234567"
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historyLen = 1
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b = 0
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for c in reversed(argv):
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b += c * historyLen
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historyLen *= 256
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data = []
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while b != 0:
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data.append(chars[b % 32])
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b //= 32
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data = "".join(reversed(data))
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checksum = { 0: 0, 1: 6, 2: 4, 3: 3, 4: 1 }
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return re.sub("A{%d}$" % checksum[modulus], lambda str: str.group(0).replace("A", "="), data)
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