#!/usr/bin/env python3

import sys

import hashlib

if sys.version_info < (3,7):

    print(“python version is not supported”, file=sys.stderr)

    sys.exit(1)

# credit goes to zhoujiazhao:

# https://blog.csdn.net/zhoujiazhao/article/details/102578244

salt = {‘r1d’: ‘A2E371B0-B34B-48A5-8C40-A7133F3B5D88’,

        ‘others’: ‘d44fb0960aa0-a5e6-4a30-250f-6d2df50a’}

def get_salt(sn):

    if “/” not in sn:

        return salt[“r1d”]

    return “-“.join(reversed(salt[“others”].split(“-“)))

def calc_passwd(sn):

    passwd = sn + get_salt(sn)

    m = hashlib.md5(passwd.encode())

    return m.hexdigest()[:8]

if __name__ == “__main__”:

    if len(sys.argv) != 2:

        print(f”Usage: {sys.argv[0]} <S/N>”)

        sys.exit(1)

    serial = sys.argv[1]

    print(calc_passwd(serial))