[Xiaomi Smart Air Purifier Filter PWD calculator] Calculate the password using a given UID #xiaomi #airFilter

xiaomi-filter-pwd.py

import sys
import hashlib

# Usage: pwd.py 04A03CAA1E7080
# credit: https://github.com/Flamingo-tech/xiaomi-air-purifier-reverse-engineering

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
 
# assert getpwd("04A03CAA1E7080") == "CD91AFCC"
# assert getpwd("04112233445566") == "EC9805C8"

def main():
	print("PWD:", getpwd(sys.argv[1]))

if __name__ == "__main__":
	main()