def _AddWorker(self):
worker_name = self.name + "-%d" % random.UInt32()
worker = _WorkerThread(self._queue, self, worker_name)
worker.start()
self._workers[worker.name] = worker
self._workers_ro_copy = self._workers.copy()
def __init__(self,
initializer=None,
base="aff4:/flows",
queue=DEFAULT_FLOW_QUEUE,
flow_name=None):
"""Constructor.
Args:
initializer: A string or another RDFURN.
base: The base namespace this session id lives in.
queue: The queue to use.
flow_name: The name of this flow or its random id.
Raises:
InitializeError: The given URN cannot be converted to a SessionID.
"""
if initializer is None:
# This SessionID is being constructed from scratch.
if flow_name is None:
flow_name = random.UInt32()
if isinstance(flow_name, int):
initializer = RDFURN(base).Add("%s:%X" % (queue.Basename(), flow_name))
else:
initializer = RDFURN(base).Add("%s:%s" % (queue.Basename(), flow_name))
else:
if isinstance(initializer, RDFURN):
try:
self.ValidateID(initializer.Basename())
except ValueError as e:
raise InitializeError("Invalid URN for SessionID: %s, %s" %
(initializer, e))
super(SessionID, self).__init__(initializer=initializer)
def __init__(self, initializer=None, age=None, **kwargs):
super(AuditEvent, self).__init__(initializer=initializer,
age=age,
**kwargs)
if not self.id:
self.id = random.UInt32()
if not self.timestamp:
self.timestamp = rdfvalue.RDFDatetime.Now()
def Request(self):
"""Create the Approval object and notify the Approval Granter."""
approval_id = "approval:%X" % random.UInt32()
approval_urn = self.BuildApprovalUrn(approval_id)
email_msg_id = email.utils.make_msgid()
with aff4.FACTORY.Create(approval_urn,
self.approval_type,
mode="w",
token=self.token) as approval_request:
approval_request.Set(
approval_request.Schema.SUBJECT(self.subject_urn))
approval_request.Set(
approval_request.Schema.REQUESTOR(self.token.username))
approval_request.Set(approval_request.Schema.REASON(self.reason))
approval_request.Set(
approval_request.Schema.EMAIL_MSG_ID(email_msg_id))
cc_addresses = (self.email_cc_address,
config.CONFIG.Get("Email.approval_cc_address"))
email_cc = ",".join(filter(None, cc_addresses))
# When we reply with the approval we want to cc all the people to whom the
# original approval was sent, to avoid people approving stuff that was
# already approved.
if email_cc:
reply_cc = ",".join((self.approver, email_cc))
else:
reply_cc = self.approver
approval_request.Set(approval_request.Schema.EMAIL_CC(reply_cc))
approval_request.Set(
approval_request.Schema.NOTIFIED_USERS(self.approver))
# We add ourselves as an approver as well (The requirement is that we have
# 2 approvers, so the requester is automatically an approver).
approval_request.AddAttribute(
approval_request.Schema.APPROVER(self.token.username))
approval_link_urns = self.BuildApprovalSymlinksUrns(approval_id)
for link_urn in approval_link_urns:
with aff4.FACTORY.Create(link_urn,
aff4.AFF4Symlink,
mode="w",
token=self.token) as link:
link.Set(link.Schema.SYMLINK_TARGET(approval_urn))
return approval_urn
def HandleWellKnownFlows(self, messages):
"""Hands off messages to well known flows."""
msgs_by_wkf = {}
result = []
for msg in messages:
# Regular message - queue it.
if msg.response_id != 0:
result.append(msg)
continue
# Well known flows:
flow_name = msg.session_id.FlowName()
if flow_name in self.well_known_flows:
# This message should be processed directly on the front end.
msgs_by_wkf.setdefault(flow_name, []).append(msg)
# TODO(user): Deprecate in favor of 'well_known_flow_requests'
# metric.
stats_collector_instance.Get().IncrementCounter(
"grr_well_known_flow_requests")
stats_collector_instance.Get().IncrementCounter(
"well_known_flow_requests", fields=[str(msg.session_id)])
else:
# Message should be queued to be processed in the backend.
# Well known flows have a response_id==0, but if we queue up the state
# as that it will overwrite some other message that is queued. So we
# change it to a random number here.
msg.response_id = random.UInt32()
# Queue the message in the data store.
result.append(msg)
for flow_name, msg_list in iteritems(msgs_by_wkf):
wkf = self.well_known_flows[flow_name]
wkf.ProcessMessages(msg_list)
return result
def SetPassword(self, password, salt=None):
if salt is None:
salt = "%08x" % random.UInt32()
self._value = self._CalculateHash(password, salt)
return self
def testSpecific(self):
self.assertEqual(random.UInt32(), 0xDEADBEEF)
self.assertEqual(random.UInt32(), 0xBADDCAFE)
def testMax(self, urandom):
del urandom # Unused.
for _ in range(10000):
self.assertEqual(random.UInt32(), 2**32 - 1)
def ReceiveMessages(self, client_id: str,
messages: Iterable[rdf_flows.GrrMessage]):
"""Receives and processes the messages.
For each message we update the request object, and place the
response in that request's queue. If the request is complete, we
send a message to the worker.
Args:
client_id: The client which sent the messages.
messages: A list of GrrMessage RDFValues.
"""
now = time.time()
unprocessed_msgs = []
worker_message_handler_requests = []
frontend_message_handler_requests = []
dropped_count = 0
msgs_by_session_id = collection.Group(messages, lambda m: m.session_id)
for session_id, msgs in msgs_by_session_id.items():
for msg in msgs:
if (msg.auth_state != msg.AuthorizationState.AUTHENTICATED
and msg.session_id != self.unauth_allowed_session_id):
dropped_count += 1
continue
session_id_str = str(session_id)
if session_id_str in message_handlers.session_id_map:
request = rdf_objects.MessageHandlerRequest(
client_id=msg.source.Basename(),
handler_name=message_handlers.
session_id_map[session_id],
request_id=msg.response_id or random.UInt32(),
request=msg.payload)
if request.handler_name in self._SHORTCUT_HANDLERS:
frontend_message_handler_requests.append(request)
else:
worker_message_handler_requests.append(request)
elif session_id_str in self.legacy_well_known_session_ids:
logging.debug(
"Dropping message for legacy well known session id %s",
session_id)
else:
unprocessed_msgs.append(msg)
if dropped_count:
logging.info("Dropped %d unauthenticated messages for %s",
dropped_count, client_id)
if unprocessed_msgs:
flow_responses = []
for message in unprocessed_msgs:
try:
flow_responses.append(
rdf_flow_objects.FlowResponseForLegacyResponse(
message))
except ValueError as e:
logging.warning(
"Failed to parse legacy FlowResponse:\n%s\n%s", e,
message)
data_store.REL_DB.WriteFlowResponses(flow_responses)
for msg in unprocessed_msgs:
if msg.type == rdf_flows.GrrMessage.Type.STATUS:
stat = rdf_flows.GrrStatus(msg.payload)
if stat.status == rdf_flows.GrrStatus.ReturnedStatus.CLIENT_KILLED:
# A client crashed while performing an action, fire an event.
crash_details = rdf_client.ClientCrash(
client_id=client_id,
session_id=msg.session_id,
backtrace=stat.backtrace,
crash_message=stat.error_message,
nanny_status=stat.nanny_status,
timestamp=rdfvalue.RDFDatetime.Now())
events.Events.PublishEvent("ClientCrash",
crash_details,
token=self.token)
if worker_message_handler_requests:
data_store.REL_DB.WriteMessageHandlerRequests(
worker_message_handler_requests)
if frontend_message_handler_requests:
worker_lib.ProcessMessageHandlerRequests(
frontend_message_handler_requests)
logging.debug("Received %s messages from %s in %s sec", len(messages),
client_id,
time.time() - now)
def GenerateRunId(self):
self.run_id = "%08X" % random.UInt32()
return self.run_id
