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get_beacon_key.py
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get_beacon_key.py
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#!/usr/bin/env python3
# Usage:
# pip3 install bluepy
# python3 get_beacon_key.py <MAC> <PRODUCT_ID>
#
# List of PRODUCT_ID:
# 339: For 'YLYK01YL'
# 950: For 'YLKG07YL' and 'YLKG08YL'
#
# Example:
# python3 get_beacon_key.py AB:CD:EF:12:34:56 950
from bluepy.btle import UUID, Peripheral, DefaultDelegate
import random
import re
import sys
MAC_PATTERN = r"^[0-9A-F]{2}:[0-9A-F]{2}:[0-9A-F]{2}:[0-9A-F]{2}:[0-9A-F]{2}:[0-9A-F]{2}$"
UUID_SERVICE = "fe95"
HANDLE_AUTH = 3
HANDLE_FIRMWARE_VERSION = 10
HANDLE_AUTH_INIT = 19
HANDLE_BEACON_KEY= 25
MI_KEY1 = bytes([0x90, 0xCA, 0x85, 0xDE])
MI_KEY2 = bytes([0x92, 0xAB, 0x54, 0xFA])
SUBSCRIBE_TRUE = bytes([0x01, 0x00])
def reverseMac(mac) -> bytes:
parts = mac.split(":")
reversedMac = bytearray()
leng = len(parts)
for i in range(1, leng + 1):
reversedMac.extend(bytearray.fromhex(parts[leng - i]))
return reversedMac
def mixA(mac, productID) -> bytes:
return bytes([mac[0], mac[2], mac[5], (productID & 0xff), (productID & 0xff), mac[4], mac[5], mac[1]])
def mixB(mac, productID) -> bytes:
return bytes([mac[0], mac[2], mac[5], ((productID >> 8) & 0xff), mac[4], mac[0], mac[5], (productID & 0xff)])
def cipherInit(key) -> bytes:
perm = bytearray()
for i in range(0, 256):
perm.extend(bytes([i & 0xff]))
keyLen = len(key)
j = 0
for i in range(0, 256):
j += perm[i] + key[i % keyLen]
j = j & 0xff
perm[i], perm[j] = perm[j], perm[i]
return perm
def cipherCrypt(input, perm) -> bytes:
index1 = 0
index2 = 0
output = bytearray()
for i in range(0, len(input)):
index1 = index1 + 1
index1 = index1 & 0xff
index2 += perm[index1]
index2 = index2 & 0xff
perm[index1], perm[index2] = perm[index2], perm[index1]
idx = perm[index1] + perm[index2]
idx = idx & 0xff
outputByte = input[i] ^ perm[idx]
output.extend(bytes([outputByte & 0xff]))
return output
def cipher(key, input) -> bytes:
# More information: https://github.com/drndos/mikettle
perm = cipherInit(key)
return cipherCrypt(input, perm)
def generateRandomToken() -> bytes:
token = bytearray()
for i in range(0, 12):
token.extend(bytes([random.randint(0,255)]))
return token
def get_beacon_key(mac, product_id):
reversed_mac = reverseMac(mac)
token = generateRandomToken()
# Pairing
input(f"Activate pairing on your '{mac}' device, then press Enter: ")
# Connect
print("Connection in progress...")
peripheral = Peripheral(deviceAddr=mac)
print("Successful connection!")
# Auth (More information: https://github.com/archaron/docs/blob/master/BLE/ylkg08y.md)
print("Authentication in progress...")
auth_service = peripheral.getServiceByUUID(UUID_SERVICE)
auth_descriptors = auth_service.getDescriptors()
peripheral.writeCharacteristic(HANDLE_AUTH_INIT, MI_KEY1, "true")
auth_descriptors[1].write(SUBSCRIBE_TRUE, "true")
peripheral.writeCharacteristic(HANDLE_AUTH, cipher(mixA(reversed_mac, product_id), token), "true")
peripheral.waitForNotifications(10.0)
peripheral.writeCharacteristic(3, cipher(token, MI_KEY2), "true")
print("Successful authentication!")
# Read
beacon_key = cipher(token, peripheral.readCharacteristic(HANDLE_BEACON_KEY)).hex()
firmware_version = cipher(token, peripheral.readCharacteristic(HANDLE_FIRMWARE_VERSION)).decode()
print(f"beaconKey: '{beacon_key}'")
print(f"firmware_version: '{firmware_version}'")
def main(argv):
# ARGS
if len(argv) <= 2 :
print("usage: get_beacon_key.py <MAC> <PRODUCT_ID>\n")
print("PRODUCT_ID:")
print(" 339: For 'YLYK01YL'")
print(" 950: For 'YLKG07YL' and 'YLKG08YL'")
return
# MAC
mac = argv[1].upper()
if not re.compile(MAC_PATTERN).match(mac):
print(f"[ERROR] The MAC address '{mac}' seems to be in the wrong format")
return
# PRODUCT_ID
product_id = argv[2]
try:
product_id = int(product_id)
except Exception:
print(f"[ERROR] The Product Id '{product_id}' seems to be in the wrong format")
return
# BEACON_KEY
get_beacon_key(mac, product_id)
if __name__ == '__main__':
main(sys.argv)