def Handle(self, args, token=None):
audit_description = ",".join([
token.username + u"." + utils.SmartUnicode(name)
for name in args.labels
])
audit_events = []
try:
index = client_index.CreateClientIndex(token=token)
client_objs = aff4.FACTORY.MultiOpen(
[cid.ToClientURN() for cid in args.client_ids],
aff4_type=aff4_grr.VFSGRRClient,
mode="rw",
token=token)
for client_obj in client_objs:
index.RemoveClientLabels(client_obj)
self.RemoveClientLabels(client_obj, args.labels)
index.AddClient(client_obj)
client_obj.Close()
audit_events.append(
events.AuditEvent(
user=token.username,
action="CLIENT_REMOVE_LABEL",
flow_name="handler.ApiRemoveClientsLabelsHandler",
client=client_obj.urn,
description=audit_description))
finally:
events.Events.PublishMultipleEvents(
{audit.AUDIT_EVENT: audit_events}, token=token)
def AddUser(username, password=None, labels=None, token=None):
"""Implementation of the add_user command."""
token = data_store.GetDefaultToken(token)
user_urn = "aff4:/users/%s" % username
try:
if aff4.FACTORY.Open(user_urn, users.GRRUser, token=token):
raise UserError("Cannot add user %s: User already exists." % username)
except aff4.InstantiationError:
pass
fd = aff4.FACTORY.Create(user_urn, users.GRRUser, mode="rw", token=token)
# Note this accepts blank passwords as valid.
if password is None:
password = getpass.getpass(prompt="Please enter password for user '%s': " %
username)
fd.SetPassword(password)
if labels:
fd.AddLabels(*set(labels), owner="GRR")
fd.Close()
EPrint("Added user %s." % username)
events.Events.PublishEvent(
"Audit",
events.AuditEvent(
user=token.username, action="USER_ADD", urn=user_urn),
token=token)
def _CreateAuditEvent(self, event_action):
flow_name = self.hunt_obj.args.flow_runner_args.flow_name
event = events.AuditEvent(user=self.hunt_obj.token.username,
action=event_action,
urn=self.hunt_obj.urn,
flow_name=flow_name,
description=self.runner_args.description)
events.Events.PublishEvent("Audit", event, token=self.hunt_obj.token)
def SimulateUserActivity(username, client_id, timestamp, num=10):
for flow_name in flows[:num]:
event = events.AuditEvent(user=username,
action="RUN_FLOW",
flow_name=flow_name,
client=client_id,
age=timestamp)
events.Events.PublishEvent("Audit", event, token=token)
def BuildApprovalUrn(self, approval_id):
"""Builds approval object urn."""
event = events.AuditEvent(user=self.token.username,
action="CLIENT_APPROVAL_BREAK_GLASS_REQUEST",
client=self.client_id,
description=self.args.reason)
events.Events.PublishEvent("Audit", event, token=self.token)
return self.ApprovalUrnBuilder(self.client_id.Path(),
self.token.username, approval_id)
def AddFakeAuditLog(description=None,
client=None,
user=None,
token=None,
**kwargs):
events.Events.PublishEventInline(
"Audit",
events.AuditEvent(
description=description, client=client, user=user, **kwargs),
token=token)
def BuildApprovalUrn(self, approval_id):
"""Builds approval object urn."""
events.Events.PublishEvent("Audit",
events.AuditEvent(
user=self.token.username,
action="CLIENT_APPROVAL_GRANT",
client=self.subject_urn,
description=self.args.reason),
token=self.token)
return self.ApprovalUrnBuilder(self.subject_urn.Path(),
self.args.delegate, approval_id)
def BuildApprovalUrn(self):
"""Builds approval object URN."""
# In this case subject_urn is hunt's URN.
events.Events.PublishEvent("Audit",
events.AuditEvent(
user=self.token.username,
action="CRON_APPROVAL_GRANT",
urn=self.args.subject_urn,
description=self.args.reason),
token=self.token)
return self.ApprovalUrnBuilder(self.args.subject_urn.Path(),
self.args.delegate, self.args.reason)
def BuildApprovalUrn(self, approval_id):
"""Builds approval object URN."""
# In this case subject_urn is a cron job's URN.
events.Events.PublishEvent("Audit",
events.AuditEvent(
user=self.token.username,
action="CRON_APPROVAL_REQUEST",
urn=self.subject_urn,
description=self.reason),
token=self.token)
return self.ApprovalUrnBuilder(self.subject_urn.Path(),
self.token.username, approval_id)
def DeleteUser(username, token=None):
"""Deletes an existing user."""
token = data_store.GetDefaultToken(token)
user_urn = "aff4:/users/%s" % username
try:
aff4.FACTORY.Open(user_urn, users.GRRUser, token=token)
except aff4.InstantiationError:
EPrint("User %s not found." % username)
return
aff4.FACTORY.Delete(user_urn, token=token)
EPrint("User %s has been deleted." % username)
events.Events.PublishEvent(
"Audit",
events.AuditEvent(
user=token.username, action="USER_DELETE", urn=user_urn),
token=token)
def Start(self):
"""Find a hunt, perform a permissions check and modify it."""
with aff4.FACTORY.Open(
self.args.hunt_urn,
aff4_type=implementation.GRRHunt,
mode="rw",
token=self.token) as hunt:
runner = hunt.GetRunner()
data_store.DB.security_manager.CheckHuntAccess(self.token.RealUID(),
hunt.urn)
# Make sure the hunt is not running:
if runner.IsHuntStarted():
raise RuntimeError("Unable to modify a running hunt.")
# Record changes in the audit event
changes = []
if runner.context.expires != self.args.expiry_time:
changes.append("Expires: Old=%s, New=%s" % (runner.context.expires,
self.args.expiry_time))
if runner.runner_args.client_limit != self.args.client_limit:
changes.append(
"Client Limit: Old=%s, New=%s" %
(runner.runner_args.client_limit, self.args.client_limit))
description = ", ".join(changes)
event = events.AuditEvent(
user=self.token.username,
action="HUNT_MODIFIED",
urn=self.args.hunt_urn,
description=description)
events.Events.PublishEvent("Audit", event, token=self.token)
# Just go ahead and change the hunt now.
runner.context.expires = self.args.expiry_time
runner.runner_args.client_limit = self.args.client_limit
def UpdateUser(username,
password,
add_labels=None,
delete_labels=None,
token=None):
"""Implementation of the update_user command."""
token = data_store.GetDefaultToken(token)
user_urn = "aff4:/users/%s" % username
try:
fd = aff4.FACTORY.Open(user_urn, users.GRRUser, mode="rw", token=token)
except aff4.InstantiationError:
raise UserError("User %s does not exist." % username)
# Note this accepts blank passwords as valid.
if password:
if not isinstance(password, basestring):
password = getpass.getpass(
prompt="Please enter password for user '%s': " % username)
fd.SetPassword(password)
# Use sets to dedup input.
current_labels = set()
# Build a list of existing labels.
for label in fd.GetLabels():
current_labels.add(label.name)
# Build a list of labels to be added.
expanded_add_labels = set()
if add_labels:
for label in add_labels:
# Split up any space or comma separated labels in the list.
labels = label.split(",")
expanded_add_labels.update(labels)
# Build a list of labels to be removed.
expanded_delete_labels = set()
if delete_labels:
for label in delete_labels:
# Split up any space or comma separated labels in the list.
labels = label.split(",")
expanded_delete_labels.update(labels)
# Set subtraction to remove labels being added and deleted at the same time.
clean_add_labels = expanded_add_labels - expanded_delete_labels
clean_del_labels = expanded_delete_labels - expanded_add_labels
# Create final list using difference to only add new labels.
final_add_labels = clean_add_labels - current_labels
# Create final list using intersection to only remove existing labels.
final_del_labels = clean_del_labels & current_labels
if final_add_labels:
fd.AddLabels(*final_add_labels, owner="GRR")
if final_del_labels:
fd.RemoveLabels(*final_del_labels, owner="GRR")
fd.Close()
EPrint("Updated user %s" % username)
ShowUser(username, token=token)
events.Events.PublishEvent(
"Audit",
events.AuditEvent(
user=token.username, action="USER_UPDATE", urn=user_urn),
token=token)
def Handle(self, args, token=None):
hunt_urn = HUNTS_ROOT_PATH.Add(args.hunt_id)
try:
hunt = aff4.FACTORY.Open(hunt_urn,
aff4_type=hunts.GRRHunt,
mode="rw",
token=token)
except aff4.InstantiationError:
raise HuntNotFoundError("Hunt with id %s could not be found" %
args.hunt_id)
current_state = hunt.Get(hunt.Schema.STATE)
hunt_changes = []
runner = hunt.GetRunner()
if args.HasField("client_limit"):
hunt_changes.append(
"Client Limit: Old=%s, New=%s" %
(runner.runner_args.client_limit, args.client_limit))
runner.runner_args.client_limit = args.client_limit
if args.HasField("client_rate"):
hunt_changes.append(
"Client Rate: Old=%s, New=%s" %
(runner.runner_args.client_rate, args.client_limit))
runner.runner_args.client_rate = args.client_rate
if args.HasField("expires"):
hunt_changes.append("Expires: Old=%s, New=%s" %
(runner.context.expires, args.expires))
runner.context.expires = args.expires
if hunt_changes and current_state != "PAUSED":
raise HuntNotModifiableError(
"Hunt's client limit/client rate/expiry time attributes "
"can only be changed if hunt's current state is "
"PAUSED")
if args.HasField("state"):
hunt_changes.append("State: Old=%s, New=%s" %
(current_state, args.state))
if args.state == ApiHunt.State.STARTED:
if current_state != "PAUSED":
raise HuntNotStartableError(
"Hunt can only be started from PAUSED state.")
hunt.Run()
elif args.state == ApiHunt.State.STOPPED:
if current_state not in ["PAUSED", "STARTED"]:
raise HuntNotStoppableError(
"Hunt can only be stopped from STARTED or "
"PAUSED states.")
hunt.Stop()
else:
raise InvalidHuntStateError(
"Hunt's state can only be updated to STARTED or STOPPED")
# Publish an audit event.
# TODO(user): this should be properly tested.
event = events.AuditEvent(user=token.username,
action="HUNT_MODIFIED",
urn=hunt_urn,
description=", ".join(hunt_changes))
events.Events.PublishEvent("Audit", event, token=token)
hunt.Close()
hunt = aff4.FACTORY.Open(hunt_urn,
aff4_type=hunts.GRRHunt,
mode="rw",
token=token)
return ApiHunt().InitFromAff4Object(hunt, with_full_summary=True)
def StartFlow(cls, args=None, runner_args=None, # pylint: disable=g-bad-name
parent_flow=None, sync=True, **kwargs):
"""The main factory function for Creating and executing a new flow.
Args:
args: An arg protocol buffer which is an instance of the required flow's
args_type class attribute.
runner_args: an instance of FlowRunnerArgs() protocol buffer which is used
to initialize the runner for this flow.
parent_flow: A parent flow or None if this is a top level flow.
sync: If True, the Start method of this flow will be called
inline. Otherwise we schedule the starting of this flow on another
worker.
**kwargs: If args or runner_args are not specified, we construct these
protobufs from these keywords.
Returns:
the session id of the flow.
Raises:
RuntimeError: Unknown or invalid parameters were provided.
"""
# Build the runner args from the keywords.
if runner_args is None:
runner_args = rdf_flows.FlowRunnerArgs()
cls.FilterArgsFromSemanticProtobuf(runner_args, kwargs)
# When asked to run a flow in the future this implied it will run
# asynchronously.
if runner_args.start_time:
sync = False
# Is the required flow a known flow?
if runner_args.flow_name not in GRRFlow.classes:
stats.STATS.IncrementCounter("grr_flow_invalid_flow_count")
raise RuntimeError("Unable to locate flow %s" % runner_args.flow_name)
# If no token is specified, use the default token.
if not runner_args.HasField("token"):
if data_store.default_token is None:
raise access_control.UnauthorizedAccess("A token must be specified.")
runner_args.token = data_store.default_token.Copy()
# Make sure we are allowed to run this flow. If not, we raise here. We
# respect SUID (supervisor) if it is already set. SUID cannot be set by the
# user since it isn't part of the ACLToken proto.
data_store.DB.security_manager.CheckIfCanStartFlow(
runner_args.token,
runner_args.flow_name,
with_client_id=runner_args.client_id)
flow_cls = GRRFlow.GetPlugin(runner_args.flow_name)
# If client id was specified and flow doesn't have exemption from ACL
# checking policy, then check that the user has access to the client
# where the flow is going to run.
if flow_cls.ACL_ENFORCED and runner_args.client_id:
data_store.DB.security_manager.CheckClientAccess(runner_args.token,
runner_args.client_id)
# For the flow itself we use a supervisor token.
token = runner_args.token.SetUID()
# Extend the expiry time of this token indefinitely. Python on Windows only
# supports dates up to the year 3000, this number corresponds to July, 2997.
token.expiry = 32427003069 * rdfvalue.RDFDatetime.converter
# We create an anonymous AFF4 object first, The runner will then generate
# the appropriate URN.
flow_obj = aff4.FACTORY.Create(
None, aff4.AFF4Object.classes.get(runner_args.flow_name), token=token)
# Now parse the flow args into the new object from the keywords.
if args is None:
args = flow_obj.args_type()
cls.FilterArgsFromSemanticProtobuf(args, kwargs)
# Check that the flow args are valid.
args.Validate()
# Store the flow args.
flow_obj.args = args
flow_obj.runner_args = runner_args
# At this point we should exhaust all the keyword args. If any are left
# over, we do not know what to do with them so raise.
if kwargs:
raise type_info.UnknownArg("Unknown parameters to StartFlow: %s" % kwargs)
# Create a flow runner to run this flow with.
if parent_flow:
parent_runner = parent_flow.runner
else:
parent_runner = None
runner = flow_obj.CreateRunner(
parent_runner=parent_runner, runner_args=runner_args)
logging.info(u"Scheduling %s(%s) on %s", flow_obj.urn,
runner_args.flow_name, runner_args.client_id)
if sync:
# Just run the first state inline. NOTE: Running synchronously means
# that this runs on the thread that starts the flow. The advantage is
# that that Start method can raise any errors immediately.
flow_obj.Start()
else:
# Running Asynchronously: Schedule the start method on another worker.
runner.CallState(next_state="Start", start_time=runner_args.start_time)
# The flow does not need to actually remain running.
if not runner.OutstandingRequests():
flow_obj.Terminate()
flow_obj.Close()
# Publish an audit event, only for top level flows.
if parent_flow is None:
events.Events.PublishEvent(
"Audit",
events.AuditEvent(
user=token.username,
action="RUN_FLOW",
flow_name=runner_args.flow_name,
urn=flow_obj.urn,
client=runner_args.client_id),
token=token)
return flow_obj.urn
def AddFakeAuditLog(description, client=None, token=None):
events.Events.PublishEventInline("Audit",
events.AuditEvent(description=description,
client=client),
token=token)
