curse_hash.py

import os


async def curse_hasher(mod):
    with open(mod, "rb") as mod_file:
        file_bytes = mod_file.read()

    blocklist = (0x9, 0xA, 0xD, 0x20)
    length = sum(byte not in blocklist for byte in file_bytes)
    seed = 1
    h = seed ^ length
    k = 0x0
    m = 0x5BD1E995
    r = 24
    shift = 0x0
    for byte in file_bytes:
        if byte in blocklist:
            continue
        k |= byte << shift
        shift += 0x8
        if shift == 0x20:
            k = (k * m) & 0xFFFFFFFF
            k ^= k >> r
            k = (k * m) & 0xFFFFFFFF
            h = (h * m) & 0xFFFFFFFF
            h ^= k
            k = 0x0
            shift = 0x0

    if shift > 0:
        h ^= k
        h = (h * m) & 0xFFFFFFFF

    h ^= h >> 13
    h = (h * m) & 0xFFFFFFFF
    h ^= h >> 15

    print(np.uint32(h))