Generate MHFUP keyfile

genMhfKey.py

import os
import zlib


def crc32(file):
    with open(file, 'rb') as fp:
        h = 0
        while True:
            s = fp.read(65536)
            if not s:
                break
            h = zlib.crc32(s, h)
    return "%08X" % (h & 0xFFFFFFFF)


def filetime(file):
    return int((os.path.getmtime(file) * 10000000) + 116444736000000000).to_bytes(8, 'big')


key = str()
for r, _, f in os.walk('mhfdat', topdown=False):
    for name in f:
        fn = os.path.join(r, name)
        fs = os.stat(fn).st_size
        if fs == 0:
            continue
        dfn = fn.replace('/', '\\')[7:]
        ftb = filetime(os.path.join(r, name))
        key += f'{crc32(fn)},{ftb[4:8].hex().upper()},{ftb[0:4].hex().upper()},{dfn},{fs},0\n'
with open('key.txt', 'w') as fp:
    fp.write(key)