xiaomi-air-purifier.py

## https://www.zhihu.com/question/424089478

import hashlib


def getpwd(uid):
    uid = bytearray.fromhex(uid)
    h = bytearray.fromhex(hashlib.sha1(uid).hexdigest())
    pwd = ""
    pwd += "%02X" % h[h[0] % 20]
    pwd += "%02X" % h[(h[0] + 5) % 20]
    pwd += "%02X" % h[(h[0] + 13) % 20]
    pwd += "%02X" % h[(h[0] + 17) % 20]
    return pwd


print(getpwd("这里输入14位卡号"))

# hf mfu wrbl b 8 d 00000000 k 这里输8位密码