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