def get_key_pkt(seed, keyfunction, level=1):
# type: (Packet, Callable[[int], int], int) -> Optional[Packet]
try:
s = seed.securitySeed
except AttributeError:
return None
return cast(Packet, GMLAN() / GMLAN_SA(subfunction=level + 1,
securityKey=keyfunction(s)))
def get_seed_pkt(sock, level=1):
# type: (_SocketUnion, int) -> Optional[Packet]
req = GMLAN() / GMLAN_SA(subfunction=level)
for _ in range(10):
seed = sock.sr1(req, timeout=5, verbose=False)
if seed is None:
return None
elif seed.service == 0x7f and \
GMLAN_Enumerator._get_negative_response_code(seed) != 0x37:
log_interactive.info("Security access no seed! NR: %s",
repr(seed))
return None
elif seed.service == 0x7f and \
GMLAN_Enumerator._get_negative_response_code(seed) == 0x37:
log_interactive.info("Security access retry to get seed")
time.sleep(10)
continue
else:
return seed
return None
def GMLAN_GetSecurityAccess(
sock, # type: SuperSocket
key_function, # type: Callable[[int], int]
level=1, # type: int
timeout=None, # type: Optional[int]
verbose=None, # type: Optional[bool]
retry=0 # type: int
):
# type: (...) -> bool
""" Authenticate on ECU. Implements Seey-Key procedure.
:param sock: socket to send the message on.
:param key_function: function implementing the key algorithm.
:param level: level of access
:param timeout: timeout for sending, receiving or sniffing packages.
:param verbose: set verbosity level
:param retry: number of retries in case of failure.
:return: True on success.
"""
if verbose is None:
verbose = conf.verb > 0
retry = abs(retry)
if key_function is None:
return False
if level % 2 == 0:
warning("Parameter Error: Level must be an odd number.")
return False
while retry >= 0:
retry -= 1
request = GMLAN() / GMLAN_SA(subfunction=level)
if verbose:
print("Requesting seed..")
resp = sock.sr1(request, timeout=timeout, verbose=0)
if not _check_response(resp, verbose):
if resp is not None and resp.returnCode == 0x37 and retry:
if verbose:
print("RequiredTimeDelayNotExpired. Wait 10s.")
time.sleep(10)
if verbose:
print("Negative Response.")
continue
seed = cast(Packet, resp).securitySeed
if seed == 0:
if verbose:
print("ECU security already unlocked. (seed is 0x0000)")
return True
keypkt = GMLAN() / GMLAN_SA(subfunction=level + 1,
securityKey=key_function(seed))
if verbose:
print("Responding with key..")
resp = sock.sr1(keypkt, timeout=timeout, verbose=0)
if resp is None:
if verbose:
print("Timeout.")
continue
if verbose:
resp.show()
if resp.service == 0x67:
if verbose:
print("SecurityAccess granted.")
return True
# Invalid Key
elif resp.service == 0x7f and resp.returnCode == 0x35:
if verbose:
print("Key invalid")
continue
return False
def _get_initial_requests(self, **kwargs):
# type: (Any) -> Iterable[Packet]
scan_range = kwargs.pop("scan_range", range(1, 10, 2))
return (GMLAN() / GMLAN_SA(subfunction=x) for x in scan_range)
def GMLAN_GetSecurityAccess(sock, key_function, level=1, timeout=None, verbose=None, retry=0): # noqa: E501
# type: (ISOTPSocket, Callable[[int], int], int, Optional[int], Optional[bool], int) -> bool # noqa: E501
""" Authenticate on ECU. Implements Seey-Key procedure.
:param sock: socket to send the message on.
:param key_function: function implementing the key algorithm.
:param level: level of access
:param timeout: timeout for sending, receiving or sniffing packages.
:param verbose: set verbosity level
:param retry: number of retries in case of failure.
:return: True on success.
"""
if verbose is None:
verbose = conf.verb > 0
retry = abs(retry)
if key_function is None:
return False
if level % 2 == 0:
warning("Parameter Error: Level must be an odd number.")
return False
while retry >= 0:
retry -= 1
request = GMLAN() / GMLAN_SA(subfunction=level)
if verbose:
print("Requesting seed..")
resp = sock.sr1(request, timeout=timeout, verbose=0)
if not _check_response(resp, verbose):
if verbose:
print("Negative Response.")
continue
seed = resp.securitySeed
if seed == 0:
if verbose:
print("ECU security already unlocked. (seed is 0x0000)")
return True
keypkt = GMLAN() / GMLAN_SA(subfunction=level + 1,
securityKey=key_function(seed))
if verbose:
print("Responding with key..")
resp = sock.sr1(keypkt, timeout=timeout, verbose=0)
if resp is None:
if verbose:
print("Timeout.")
continue
if verbose:
resp.show()
if resp.sprintf("%GMLAN.service%") == "SecurityAccessPositiveResponse": # noqa: E501
if verbose:
print("SecurityAccess granted.")
return True
# Invalid Key
elif resp.sprintf("%GMLAN.service%") == "NegativeResponse" and \
resp.sprintf("%GMLAN.returnCode%") == "InvalidKey":
if verbose:
print("Key invalid")
continue
return False
def _get_initial_requests(self, **kwargs):
# type: (Any) -> Iterable[Packet]
return (GMLAN() / GMLAN_SA(subfunction=x) for x in range(1, 10, 2))
