186
325
dbus.UInt16(self.port),
187
326
avahi.string_array_to_txt_array(self.TXT))
188
327
self.group.Commit()
189
329
def entry_group_state_changed(self, state, error):
190
330
"""Derived from the Avahi example code"""
191
logger.debug(u"Avahi state change: %i", state)
331
logger.debug("Avahi entry group state change: %i", state)
193
333
if state == avahi.ENTRY_GROUP_ESTABLISHED:
194
logger.debug(u"Zeroconf service established.")
334
logger.debug("Zeroconf service established.")
195
335
elif state == avahi.ENTRY_GROUP_COLLISION:
196
logger.warning(u"Zeroconf service name collision.")
336
logger.info("Zeroconf service name collision.")
198
338
elif state == avahi.ENTRY_GROUP_FAILURE:
199
logger.critical(u"Avahi: Error in group state changed %s",
201
raise AvahiGroupError(u"State changed: %s"
339
logger.critical("Avahi: Error in group state changed %s",
341
raise AvahiGroupError("State changed: {!s}"
203
344
def cleanup(self):
204
345
"""Derived from the Avahi example code"""
205
346
if self.group is not None:
349
except (dbus.exceptions.UnknownMethodException,
350
dbus.exceptions.DBusException):
207
352
self.group = None
208
def server_state_changed(self, state):
355
def server_state_changed(self, state, error=None):
209
356
"""Derived from the Avahi example code"""
210
if state == avahi.SERVER_COLLISION:
211
logger.error(u"Zeroconf server name collision")
357
logger.debug("Avahi server state change: %i", state)
358
bad_states = { avahi.SERVER_INVALID:
359
"Zeroconf server invalid",
360
avahi.SERVER_REGISTERING: None,
361
avahi.SERVER_COLLISION:
362
"Zeroconf server name collision",
363
avahi.SERVER_FAILURE:
364
"Zeroconf server failure" }
365
if state in bad_states:
366
if bad_states[state] is not None:
368
logger.error(bad_states[state])
370
logger.error(bad_states[state] + ": %r", error)
213
372
elif state == avahi.SERVER_RUNNING:
376
logger.debug("Unknown state: %r", state)
378
logger.debug("Unknown state: %r: %r", state, error)
215
380
def activate(self):
216
381
"""Derived from the Avahi example code"""
217
382
if self.server is None:
218
383
self.server = dbus.Interface(
219
384
self.bus.get_object(avahi.DBUS_NAME,
220
avahi.DBUS_PATH_SERVER),
385
avahi.DBUS_PATH_SERVER,
386
follow_name_owner_changes=True),
221
387
avahi.DBUS_INTERFACE_SERVER)
222
self.server.connect_to_signal(u"StateChanged",
388
self.server.connect_to_signal("StateChanged",
223
389
self.server_state_changed)
224
390
self.server_state_changed(self.server.GetState())
393
class AvahiServiceToSyslog(AvahiService):
395
"""Add the new name to the syslog messages"""
396
ret = AvahiService.rename(self)
397
syslogger.setFormatter(logging.Formatter
398
('Mandos ({}) [%(process)d]:'
399
' %(levelname)s: %(message)s'
227
404
class Client(object):
228
405
"""A representation of a client host served by this server.
231
name: string; from the config file, used in log messages and
233
fingerprint: string (40 or 32 hexadecimal digits); used to
234
uniquely identify the client
235
secret: bytestring; sent verbatim (over TLS) to client
236
host: string; available for use by the checker command
237
created: datetime.datetime(); (UTC) object creation
238
last_enabled: datetime.datetime(); (UTC)
240
last_checked_ok: datetime.datetime(); (UTC) or None
241
timeout: datetime.timedelta(); How long from last_checked_ok
242
until this client is invalid
243
interval: datetime.timedelta(); How often to start a new checker
244
disable_hook: If set, called by disable() as disable_hook(self)
408
approved: bool(); 'None' if not yet approved/disapproved
409
approval_delay: datetime.timedelta(); Time to wait for approval
410
approval_duration: datetime.timedelta(); Duration of one approval
245
411
checker: subprocess.Popen(); a running checker process used
246
412
to see if the client lives.
247
413
'None' if no process is running.
248
checker_initiator_tag: a gobject event source tag, or None
249
disable_initiator_tag: - '' -
250
checker_callback_tag: - '' -
251
checker_command: string; External command which is run to check if
252
client lives. %() expansions are done at
414
checker_callback_tag: a gobject event source tag, or None
415
checker_command: string; External command which is run to check
416
if client lives. %() expansions are done at
253
417
runtime with vars(self) as dict, so that for
254
418
instance %(name)s can be used in the command.
419
checker_initiator_tag: a gobject event source tag, or None
420
created: datetime.datetime(); (UTC) object creation
421
client_structure: Object describing what attributes a client has
422
and is used for storing the client at exit
255
423
current_checker_command: string; current running checker_command
424
disable_initiator_tag: a gobject event source tag, or None
426
fingerprint: string (40 or 32 hexadecimal digits); used to
427
uniquely identify the client
428
host: string; available for use by the checker command
429
interval: datetime.timedelta(); How often to start a new checker
430
last_approval_request: datetime.datetime(); (UTC) or None
431
last_checked_ok: datetime.datetime(); (UTC) or None
432
last_checker_status: integer between 0 and 255 reflecting exit
433
status of last checker. -1 reflects crashed
434
checker, -2 means no checker completed yet.
435
last_enabled: datetime.datetime(); (UTC) or None
436
name: string; from the config file, used in log messages and
438
secret: bytestring; sent verbatim (over TLS) to client
439
timeout: datetime.timedelta(); How long from last_checked_ok
440
until this client is disabled
441
extended_timeout: extra long timeout when secret has been sent
442
runtime_expansions: Allowed attributes for runtime expansion.
443
expires: datetime.datetime(); time (UTC) when a client will be
445
server_settings: The server_settings dict from main()
448
runtime_expansions = ("approval_delay", "approval_duration",
449
"created", "enabled", "expires",
450
"fingerprint", "host", "interval",
451
"last_approval_request", "last_checked_ok",
452
"last_enabled", "name", "timeout")
453
client_defaults = { "timeout": "PT5M",
454
"extended_timeout": "PT15M",
456
"checker": "fping -q -- %%(host)s",
458
"approval_delay": "PT0S",
459
"approval_duration": "PT1S",
460
"approved_by_default": "True",
259
def _datetime_to_milliseconds(dt):
260
"Convert a datetime.datetime() to milliseconds"
261
return ((dt.days * 24 * 60 * 60 * 1000)
262
+ (dt.seconds * 1000)
263
+ (dt.microseconds // 1000))
265
def timeout_milliseconds(self):
266
"Return the 'timeout' attribute in milliseconds"
267
return self._datetime_to_milliseconds(self.timeout)
269
def interval_milliseconds(self):
270
"Return the 'interval' attribute in milliseconds"
271
return self._datetime_to_milliseconds(self.interval)
273
def __init__(self, name = None, disable_hook=None, config=None):
274
"""Note: the 'checker' key in 'config' sets the
275
'checker_command' attribute and *not* the 'checker'
465
def config_parser(config):
466
"""Construct a new dict of client settings of this form:
467
{ client_name: {setting_name: value, ...}, ...}
468
with exceptions for any special settings as defined above.
469
NOTE: Must be a pure function. Must return the same result
470
value given the same arguments.
473
for client_name in config.sections():
474
section = dict(config.items(client_name))
475
client = settings[client_name] = {}
477
client["host"] = section["host"]
478
# Reformat values from string types to Python types
479
client["approved_by_default"] = config.getboolean(
480
client_name, "approved_by_default")
481
client["enabled"] = config.getboolean(client_name,
484
client["fingerprint"] = (section["fingerprint"].upper()
486
if "secret" in section:
487
client["secret"] = section["secret"].decode("base64")
488
elif "secfile" in section:
489
with open(os.path.expanduser(os.path.expandvars
490
(section["secfile"])),
492
client["secret"] = secfile.read()
494
raise TypeError("No secret or secfile for section {}"
496
client["timeout"] = string_to_delta(section["timeout"])
497
client["extended_timeout"] = string_to_delta(
498
section["extended_timeout"])
499
client["interval"] = string_to_delta(section["interval"])
500
client["approval_delay"] = string_to_delta(
501
section["approval_delay"])
502
client["approval_duration"] = string_to_delta(
503
section["approval_duration"])
504
client["checker_command"] = section["checker"]
505
client["last_approval_request"] = None
506
client["last_checked_ok"] = None
507
client["last_checker_status"] = -2
511
def __init__(self, settings, name = None, server_settings=None):
280
logger.debug(u"Creating client %r", self.name)
513
if server_settings is None:
515
self.server_settings = server_settings
516
# adding all client settings
517
for setting, value in settings.items():
518
setattr(self, setting, value)
521
if not hasattr(self, "last_enabled"):
522
self.last_enabled = datetime.datetime.utcnow()
523
if not hasattr(self, "expires"):
524
self.expires = (datetime.datetime.utcnow()
527
self.last_enabled = None
530
logger.debug("Creating client %r", self.name)
281
531
# Uppercase and remove spaces from fingerprint for later
282
532
# comparison purposes with return value from the fingerprint()
284
self.fingerprint = (config[u"fingerprint"].upper()
286
logger.debug(u" Fingerprint: %s", self.fingerprint)
287
if u"secret" in config:
288
self.secret = config[u"secret"].decode(u"base64")
289
elif u"secfile" in config:
290
with closing(open(os.path.expanduser
292
(config[u"secfile"])))) as secfile:
293
self.secret = secfile.read()
295
raise TypeError(u"No secret or secfile for client %s"
297
self.host = config.get(u"host", u"")
298
self.created = datetime.datetime.utcnow()
300
self.last_enabled = None
301
self.last_checked_ok = None
302
self.timeout = string_to_delta(config[u"timeout"])
303
self.interval = string_to_delta(config[u"interval"])
304
self.disable_hook = disable_hook
534
logger.debug(" Fingerprint: %s", self.fingerprint)
535
self.created = settings.get("created",
536
datetime.datetime.utcnow())
538
# attributes specific for this server instance
305
539
self.checker = None
306
540
self.checker_initiator_tag = None
307
541
self.disable_initiator_tag = None
308
542
self.checker_callback_tag = None
309
self.checker_command = config[u"checker"]
310
543
self.current_checker_command = None
311
self.last_connect = None
545
self.approvals_pending = 0
546
self.changedstate = (multiprocessing_manager
547
.Condition(multiprocessing_manager
549
self.client_structure = [attr for attr in
550
self.__dict__.iterkeys()
551
if not attr.startswith("_")]
552
self.client_structure.append("client_structure")
554
for name, t in inspect.getmembers(type(self),
558
if not name.startswith("_"):
559
self.client_structure.append(name)
561
# Send notice to process children that client state has changed
562
def send_changedstate(self):
563
with self.changedstate:
564
self.changedstate.notify_all()
313
566
def enable(self):
314
567
"""Start this client's checker and timeout hooks"""
315
if getattr(self, u"enabled", False):
568
if getattr(self, "enabled", False):
316
569
# Already enabled
571
self.expires = datetime.datetime.utcnow() + self.timeout
318
573
self.last_enabled = datetime.datetime.utcnow()
575
self.send_changedstate()
577
def disable(self, quiet=True):
578
"""Disable this client."""
579
if not getattr(self, "enabled", False):
582
logger.info("Disabling client %s", self.name)
583
if getattr(self, "disable_initiator_tag", None) is not None:
584
gobject.source_remove(self.disable_initiator_tag)
585
self.disable_initiator_tag = None
587
if getattr(self, "checker_initiator_tag", None) is not None:
588
gobject.source_remove(self.checker_initiator_tag)
589
self.checker_initiator_tag = None
593
self.send_changedstate()
594
# Do not run this again if called by a gobject.timeout_add
600
def init_checker(self):
319
601
# Schedule a new checker to be started an 'interval' from now,
320
602
# and every interval from then on.
603
if self.checker_initiator_tag is not None:
604
gobject.source_remove(self.checker_initiator_tag)
321
605
self.checker_initiator_tag = (gobject.timeout_add
322
(self.interval_milliseconds(),
607
.total_seconds() * 1000),
323
608
self.start_checker))
609
# Schedule a disable() when 'timeout' has passed
610
if self.disable_initiator_tag is not None:
611
gobject.source_remove(self.disable_initiator_tag)
612
self.disable_initiator_tag = (gobject.timeout_add
614
.total_seconds() * 1000),
324
616
# Also start a new checker *right now*.
325
617
self.start_checker()
326
# Schedule a disable() when 'timeout' has passed
327
self.disable_initiator_tag = (gobject.timeout_add
328
(self.timeout_milliseconds(),
333
"""Disable this client."""
334
if not getattr(self, "enabled", False):
336
logger.info(u"Disabling client %s", self.name)
337
if getattr(self, u"disable_initiator_tag", False):
338
gobject.source_remove(self.disable_initiator_tag)
339
self.disable_initiator_tag = None
340
if getattr(self, u"checker_initiator_tag", False):
341
gobject.source_remove(self.checker_initiator_tag)
342
self.checker_initiator_tag = None
344
if self.disable_hook:
345
self.disable_hook(self)
347
# Do not run this again if called by a gobject.timeout_add
351
self.disable_hook = None
354
619
def checker_callback(self, pid, condition, command):
355
620
"""The checker has completed, so take appropriate actions."""
356
621
self.checker_callback_tag = None
357
622
self.checker = None
358
623
if os.WIFEXITED(condition):
359
exitstatus = os.WEXITSTATUS(condition)
361
logger.info(u"Checker for %(name)s succeeded",
624
self.last_checker_status = os.WEXITSTATUS(condition)
625
if self.last_checker_status == 0:
626
logger.info("Checker for %(name)s succeeded",
363
628
self.checked_ok()
365
logger.info(u"Checker for %(name)s failed",
630
logger.info("Checker for %(name)s failed",
368
logger.warning(u"Checker for %(name)s crashed?",
633
self.last_checker_status = -1
634
logger.warning("Checker for %(name)s crashed?",
371
637
def checked_ok(self):
372
"""Bump up the timeout for this client.
374
This should only be called when the client has been seen,
638
"""Assert that the client has been seen, alive and well."""
377
639
self.last_checked_ok = datetime.datetime.utcnow()
378
gobject.source_remove(self.disable_initiator_tag)
379
self.disable_initiator_tag = (gobject.timeout_add
380
(self.timeout_milliseconds(),
640
self.last_checker_status = 0
643
def bump_timeout(self, timeout=None):
644
"""Bump up the timeout for this client."""
646
timeout = self.timeout
647
if self.disable_initiator_tag is not None:
648
gobject.source_remove(self.disable_initiator_tag)
649
self.disable_initiator_tag = None
650
if getattr(self, "enabled", False):
651
self.disable_initiator_tag = (gobject.timeout_add
652
(int(timeout.total_seconds()
653
* 1000), self.disable))
654
self.expires = datetime.datetime.utcnow() + timeout
656
def need_approval(self):
657
self.last_approval_request = datetime.datetime.utcnow()
383
659
def start_checker(self):
384
660
"""Start a new checker subprocess if one is not running.
453
746
if self.checker_callback_tag:
454
747
gobject.source_remove(self.checker_callback_tag)
455
748
self.checker_callback_tag = None
456
if getattr(self, u"checker", None) is None:
749
if getattr(self, "checker", None) is None:
458
logger.debug(u"Stopping checker for %(name)s", vars(self))
751
logger.debug("Stopping checker for %(name)s", vars(self))
460
os.kill(self.checker.pid, signal.SIGTERM)
753
self.checker.terminate()
462
755
#if self.checker.poll() is None:
463
# os.kill(self.checker.pid, signal.SIGKILL)
464
except OSError, error:
756
# self.checker.kill()
757
except OSError as error:
465
758
if error.errno != errno.ESRCH: # No such process
467
760
self.checker = None
469
def still_valid(self):
470
"""Has the timeout not yet passed for this client?"""
471
if not getattr(self, u"enabled", False):
473
now = datetime.datetime.utcnow()
474
if self.last_checked_ok is None:
475
return now < (self.created + self.timeout)
477
return now < (self.last_checked_ok + self.timeout)
480
class ClientDBus(Client, dbus.service.Object):
763
def dbus_service_property(dbus_interface, signature="v",
764
access="readwrite", byte_arrays=False):
765
"""Decorators for marking methods of a DBusObjectWithProperties to
766
become properties on the D-Bus.
768
The decorated method will be called with no arguments by "Get"
769
and with one argument by "Set".
771
The parameters, where they are supported, are the same as
772
dbus.service.method, except there is only "signature", since the
773
type from Get() and the type sent to Set() is the same.
775
# Encoding deeply encoded byte arrays is not supported yet by the
776
# "Set" method, so we fail early here:
777
if byte_arrays and signature != "ay":
778
raise ValueError("Byte arrays not supported for non-'ay'"
779
" signature {!r}".format(signature))
781
func._dbus_is_property = True
782
func._dbus_interface = dbus_interface
783
func._dbus_signature = signature
784
func._dbus_access = access
785
func._dbus_name = func.__name__
786
if func._dbus_name.endswith("_dbus_property"):
787
func._dbus_name = func._dbus_name[:-14]
788
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
793
def dbus_interface_annotations(dbus_interface):
794
"""Decorator for marking functions returning interface annotations
798
@dbus_interface_annotations("org.example.Interface")
799
def _foo(self): # Function name does not matter
800
return {"org.freedesktop.DBus.Deprecated": "true",
801
"org.freedesktop.DBus.Property.EmitsChangedSignal":
805
func._dbus_is_interface = True
806
func._dbus_interface = dbus_interface
807
func._dbus_name = dbus_interface
812
def dbus_annotations(annotations):
813
"""Decorator to annotate D-Bus methods, signals or properties
816
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
817
"org.freedesktop.DBus.Property."
818
"EmitsChangedSignal": "false"})
819
@dbus_service_property("org.example.Interface", signature="b",
821
def Property_dbus_property(self):
822
return dbus.Boolean(False)
825
func._dbus_annotations = annotations
830
class DBusPropertyException(dbus.exceptions.DBusException):
831
"""A base class for D-Bus property-related exceptions
835
class DBusPropertyAccessException(DBusPropertyException):
836
"""A property's access permissions disallows an operation.
841
class DBusPropertyNotFound(DBusPropertyException):
842
"""An attempt was made to access a non-existing property.
847
class DBusObjectWithProperties(dbus.service.Object):
848
"""A D-Bus object with properties.
850
Classes inheriting from this can use the dbus_service_property
851
decorator to expose methods as D-Bus properties. It exposes the
852
standard Get(), Set(), and GetAll() methods on the D-Bus.
856
def _is_dbus_thing(thing):
857
"""Returns a function testing if an attribute is a D-Bus thing
859
If called like _is_dbus_thing("method") it returns a function
860
suitable for use as predicate to inspect.getmembers().
862
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
865
def _get_all_dbus_things(self, thing):
866
"""Returns a generator of (name, attribute) pairs
868
return ((getattr(athing.__get__(self), "_dbus_name",
870
athing.__get__(self))
871
for cls in self.__class__.__mro__
873
inspect.getmembers(cls,
874
self._is_dbus_thing(thing)))
876
def _get_dbus_property(self, interface_name, property_name):
877
"""Returns a bound method if one exists which is a D-Bus
878
property with the specified name and interface.
880
for cls in self.__class__.__mro__:
881
for name, value in (inspect.getmembers
883
self._is_dbus_thing("property"))):
884
if (value._dbus_name == property_name
885
and value._dbus_interface == interface_name):
886
return value.__get__(self)
889
raise DBusPropertyNotFound(self.dbus_object_path + ":"
890
+ interface_name + "."
893
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
895
def Get(self, interface_name, property_name):
896
"""Standard D-Bus property Get() method, see D-Bus standard.
898
prop = self._get_dbus_property(interface_name, property_name)
899
if prop._dbus_access == "write":
900
raise DBusPropertyAccessException(property_name)
902
if not hasattr(value, "variant_level"):
904
return type(value)(value, variant_level=value.variant_level+1)
906
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
907
def Set(self, interface_name, property_name, value):
908
"""Standard D-Bus property Set() method, see D-Bus standard.
910
prop = self._get_dbus_property(interface_name, property_name)
911
if prop._dbus_access == "read":
912
raise DBusPropertyAccessException(property_name)
913
if prop._dbus_get_args_options["byte_arrays"]:
914
# The byte_arrays option is not supported yet on
915
# signatures other than "ay".
916
if prop._dbus_signature != "ay":
917
raise ValueError("Byte arrays not supported for non-"
918
"'ay' signature {!r}"
919
.format(prop._dbus_signature))
920
value = dbus.ByteArray(b''.join(chr(byte)
924
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
925
out_signature="a{sv}")
926
def GetAll(self, interface_name):
927
"""Standard D-Bus property GetAll() method, see D-Bus
930
Note: Will not include properties with access="write".
933
for name, prop in self._get_all_dbus_things("property"):
935
and interface_name != prop._dbus_interface):
936
# Interface non-empty but did not match
938
# Ignore write-only properties
939
if prop._dbus_access == "write":
942
if not hasattr(value, "variant_level"):
943
properties[name] = value
945
properties[name] = type(value)(value, variant_level=
946
value.variant_level+1)
947
return dbus.Dictionary(properties, signature="sv")
949
@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
950
def PropertiesChanged(self, interface_name, changed_properties,
951
invalidated_properties):
952
"""Standard D-Bus PropertiesChanged() signal, see D-Bus
957
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
959
path_keyword='object_path',
960
connection_keyword='connection')
961
def Introspect(self, object_path, connection):
962
"""Overloading of standard D-Bus method.
964
Inserts property tags and interface annotation tags.
966
xmlstring = dbus.service.Object.Introspect(self, object_path,
969
document = xml.dom.minidom.parseString(xmlstring)
970
def make_tag(document, name, prop):
971
e = document.createElement("property")
972
e.setAttribute("name", name)
973
e.setAttribute("type", prop._dbus_signature)
974
e.setAttribute("access", prop._dbus_access)
976
for if_tag in document.getElementsByTagName("interface"):
978
for tag in (make_tag(document, name, prop)
980
in self._get_all_dbus_things("property")
981
if prop._dbus_interface
982
== if_tag.getAttribute("name")):
983
if_tag.appendChild(tag)
984
# Add annotation tags
985
for typ in ("method", "signal", "property"):
986
for tag in if_tag.getElementsByTagName(typ):
988
for name, prop in (self.
989
_get_all_dbus_things(typ)):
990
if (name == tag.getAttribute("name")
991
and prop._dbus_interface
992
== if_tag.getAttribute("name")):
993
annots.update(getattr
997
for name, value in annots.items():
998
ann_tag = document.createElement(
1000
ann_tag.setAttribute("name", name)
1001
ann_tag.setAttribute("value", value)
1002
tag.appendChild(ann_tag)
1003
# Add interface annotation tags
1004
for annotation, value in dict(
1005
itertools.chain.from_iterable(
1006
annotations().items()
1007
for name, annotations in
1008
self._get_all_dbus_things("interface")
1009
if name == if_tag.getAttribute("name")
1011
ann_tag = document.createElement("annotation")
1012
ann_tag.setAttribute("name", annotation)
1013
ann_tag.setAttribute("value", value)
1014
if_tag.appendChild(ann_tag)
1015
# Add the names to the return values for the
1016
# "org.freedesktop.DBus.Properties" methods
1017
if (if_tag.getAttribute("name")
1018
== "org.freedesktop.DBus.Properties"):
1019
for cn in if_tag.getElementsByTagName("method"):
1020
if cn.getAttribute("name") == "Get":
1021
for arg in cn.getElementsByTagName("arg"):
1022
if (arg.getAttribute("direction")
1024
arg.setAttribute("name", "value")
1025
elif cn.getAttribute("name") == "GetAll":
1026
for arg in cn.getElementsByTagName("arg"):
1027
if (arg.getAttribute("direction")
1029
arg.setAttribute("name", "props")
1030
xmlstring = document.toxml("utf-8")
1032
except (AttributeError, xml.dom.DOMException,
1033
xml.parsers.expat.ExpatError) as error:
1034
logger.error("Failed to override Introspection method",
1039
def datetime_to_dbus(dt, variant_level=0):
1040
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1042
return dbus.String("", variant_level = variant_level)
1043
return dbus.String(dt.isoformat(),
1044
variant_level=variant_level)
1047
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1048
"""A class decorator; applied to a subclass of
1049
dbus.service.Object, it will add alternate D-Bus attributes with
1050
interface names according to the "alt_interface_names" mapping.
1053
@alternate_dbus_interfaces({"org.example.Interface":
1054
"net.example.AlternateInterface"})
1055
class SampleDBusObject(dbus.service.Object):
1056
@dbus.service.method("org.example.Interface")
1057
def SampleDBusMethod():
1060
The above "SampleDBusMethod" on "SampleDBusObject" will be
1061
reachable via two interfaces: "org.example.Interface" and
1062
"net.example.AlternateInterface", the latter of which will have
1063
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1064
"true", unless "deprecate" is passed with a False value.
1066
This works for methods and signals, and also for D-Bus properties
1067
(from DBusObjectWithProperties) and interfaces (from the
1068
dbus_interface_annotations decorator).
1071
for orig_interface_name, alt_interface_name in (
1072
alt_interface_names.items()):
1074
interface_names = set()
1075
# Go though all attributes of the class
1076
for attrname, attribute in inspect.getmembers(cls):
1077
# Ignore non-D-Bus attributes, and D-Bus attributes
1078
# with the wrong interface name
1079
if (not hasattr(attribute, "_dbus_interface")
1080
or not attribute._dbus_interface
1081
.startswith(orig_interface_name)):
1083
# Create an alternate D-Bus interface name based on
1085
alt_interface = (attribute._dbus_interface
1086
.replace(orig_interface_name,
1087
alt_interface_name))
1088
interface_names.add(alt_interface)
1089
# Is this a D-Bus signal?
1090
if getattr(attribute, "_dbus_is_signal", False):
1091
# Extract the original non-method undecorated
1092
# function by black magic
1093
nonmethod_func = (dict(
1094
zip(attribute.func_code.co_freevars,
1095
attribute.__closure__))["func"]
1097
# Create a new, but exactly alike, function
1098
# object, and decorate it to be a new D-Bus signal
1099
# with the alternate D-Bus interface name
1100
new_function = (dbus.service.signal
1102
attribute._dbus_signature)
1103
(types.FunctionType(
1104
nonmethod_func.func_code,
1105
nonmethod_func.func_globals,
1106
nonmethod_func.func_name,
1107
nonmethod_func.func_defaults,
1108
nonmethod_func.func_closure)))
1109
# Copy annotations, if any
1111
new_function._dbus_annotations = (
1112
dict(attribute._dbus_annotations))
1113
except AttributeError:
1115
# Define a creator of a function to call both the
1116
# original and alternate functions, so both the
1117
# original and alternate signals gets sent when
1118
# the function is called
1119
def fixscope(func1, func2):
1120
"""This function is a scope container to pass
1121
func1 and func2 to the "call_both" function
1122
outside of its arguments"""
1123
def call_both(*args, **kwargs):
1124
"""This function will emit two D-Bus
1125
signals by calling func1 and func2"""
1126
func1(*args, **kwargs)
1127
func2(*args, **kwargs)
1129
# Create the "call_both" function and add it to
1131
attr[attrname] = fixscope(attribute, new_function)
1132
# Is this a D-Bus method?
1133
elif getattr(attribute, "_dbus_is_method", False):
1134
# Create a new, but exactly alike, function
1135
# object. Decorate it to be a new D-Bus method
1136
# with the alternate D-Bus interface name. Add it
1138
attr[attrname] = (dbus.service.method
1140
attribute._dbus_in_signature,
1141
attribute._dbus_out_signature)
1143
(attribute.func_code,
1144
attribute.func_globals,
1145
attribute.func_name,
1146
attribute.func_defaults,
1147
attribute.func_closure)))
1148
# Copy annotations, if any
1150
attr[attrname]._dbus_annotations = (
1151
dict(attribute._dbus_annotations))
1152
except AttributeError:
1154
# Is this a D-Bus property?
1155
elif getattr(attribute, "_dbus_is_property", False):
1156
# Create a new, but exactly alike, function
1157
# object, and decorate it to be a new D-Bus
1158
# property with the alternate D-Bus interface
1159
# name. Add it to the class.
1160
attr[attrname] = (dbus_service_property
1162
attribute._dbus_signature,
1163
attribute._dbus_access,
1165
._dbus_get_args_options
1168
(attribute.func_code,
1169
attribute.func_globals,
1170
attribute.func_name,
1171
attribute.func_defaults,
1172
attribute.func_closure)))
1173
# Copy annotations, if any
1175
attr[attrname]._dbus_annotations = (
1176
dict(attribute._dbus_annotations))
1177
except AttributeError:
1179
# Is this a D-Bus interface?
1180
elif getattr(attribute, "_dbus_is_interface", False):
1181
# Create a new, but exactly alike, function
1182
# object. Decorate it to be a new D-Bus interface
1183
# with the alternate D-Bus interface name. Add it
1185
attr[attrname] = (dbus_interface_annotations
1188
(attribute.func_code,
1189
attribute.func_globals,
1190
attribute.func_name,
1191
attribute.func_defaults,
1192
attribute.func_closure)))
1194
# Deprecate all alternate interfaces
1195
iname="_AlternateDBusNames_interface_annotation{}"
1196
for interface_name in interface_names:
1197
@dbus_interface_annotations(interface_name)
1199
return { "org.freedesktop.DBus.Deprecated":
1201
# Find an unused name
1202
for aname in (iname.format(i)
1203
for i in itertools.count()):
1204
if aname not in attr:
1208
# Replace the class with a new subclass of it with
1209
# methods, signals, etc. as created above.
1210
cls = type(b"{}Alternate".format(cls.__name__),
1216
@alternate_dbus_interfaces({"se.recompile.Mandos":
1217
"se.bsnet.fukt.Mandos"})
1218
class ClientDBus(Client, DBusObjectWithProperties):
481
1219
"""A Client class using D-Bus
484
1222
dbus_object_path: dbus.ObjectPath
485
1223
bus: dbus.SystemBus()
1226
runtime_expansions = (Client.runtime_expansions
1227
+ ("dbus_object_path",))
1229
_interface = "se.recompile.Mandos.Client"
487
1231
# dbus.service.Object doesn't use super(), so we can't either.
489
1233
def __init__(self, bus = None, *args, **kwargs):
491
1235
Client.__init__(self, *args, **kwargs)
492
1236
# Only now, when this client is initialized, can it show up on
1238
client_object_name = str(self.name).translate(
1239
{ord("."): ord("_"),
1240
ord("-"): ord("_")})
494
1241
self.dbus_object_path = (dbus.ObjectPath
496
+ self.name.replace(u".", u"_")))
497
dbus.service.Object.__init__(self, self.bus,
498
self.dbus_object_path)
501
def _datetime_to_dbus(dt, variant_level=0):
502
"""Convert a UTC datetime.datetime() to a D-Bus type."""
503
return dbus.String(dt.isoformat(),
504
variant_level=variant_level)
507
oldstate = getattr(self, u"enabled", False)
508
r = Client.enable(self)
509
if oldstate != self.enabled:
511
self.PropertyChanged(dbus.String(u"enabled"),
512
dbus.Boolean(True, variant_level=1))
513
self.PropertyChanged(
514
dbus.String(u"last_enabled"),
515
self._datetime_to_dbus(self.last_enabled,
519
def disable(self, signal = True):
520
oldstate = getattr(self, u"enabled", False)
521
r = Client.disable(self)
522
if signal and oldstate != self.enabled:
524
self.PropertyChanged(dbus.String(u"enabled"),
525
dbus.Boolean(False, variant_level=1))
1242
("/clients/" + client_object_name))
1243
DBusObjectWithProperties.__init__(self, self.bus,
1244
self.dbus_object_path)
1246
def notifychangeproperty(transform_func,
1247
dbus_name, type_func=lambda x: x,
1248
variant_level=1, invalidate_only=False,
1249
_interface=_interface):
1250
""" Modify a variable so that it's a property which announces
1251
its changes to DBus.
1253
transform_fun: Function that takes a value and a variant_level
1254
and transforms it to a D-Bus type.
1255
dbus_name: D-Bus name of the variable
1256
type_func: Function that transform the value before sending it
1257
to the D-Bus. Default: no transform
1258
variant_level: D-Bus variant level. Default: 1
1260
attrname = "_{}".format(dbus_name)
1261
def setter(self, value):
1262
if hasattr(self, "dbus_object_path"):
1263
if (not hasattr(self, attrname) or
1264
type_func(getattr(self, attrname, None))
1265
!= type_func(value)):
1267
self.PropertiesChanged(_interface,
1272
dbus_value = transform_func(type_func(value),
1275
self.PropertyChanged(dbus.String(dbus_name),
1277
self.PropertiesChanged(_interface,
1279
dbus.String(dbus_name):
1280
dbus_value }), dbus.Array())
1281
setattr(self, attrname, value)
1283
return property(lambda self: getattr(self, attrname), setter)
1285
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1286
approvals_pending = notifychangeproperty(dbus.Boolean,
1289
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1290
last_enabled = notifychangeproperty(datetime_to_dbus,
1292
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1293
type_func = lambda checker:
1294
checker is not None)
1295
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1297
last_checker_status = notifychangeproperty(dbus.Int16,
1298
"LastCheckerStatus")
1299
last_approval_request = notifychangeproperty(
1300
datetime_to_dbus, "LastApprovalRequest")
1301
approved_by_default = notifychangeproperty(dbus.Boolean,
1302
"ApprovedByDefault")
1303
approval_delay = notifychangeproperty(dbus.UInt64,
1306
lambda td: td.total_seconds()
1308
approval_duration = notifychangeproperty(
1309
dbus.UInt64, "ApprovalDuration",
1310
type_func = lambda td: td.total_seconds() * 1000)
1311
host = notifychangeproperty(dbus.String, "Host")
1312
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1313
type_func = lambda td:
1314
td.total_seconds() * 1000)
1315
extended_timeout = notifychangeproperty(
1316
dbus.UInt64, "ExtendedTimeout",
1317
type_func = lambda td: td.total_seconds() * 1000)
1318
interval = notifychangeproperty(dbus.UInt64,
1321
lambda td: td.total_seconds()
1323
checker_command = notifychangeproperty(dbus.String, "Checker")
1324
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1325
invalidate_only=True)
1327
del notifychangeproperty
528
1329
def __del__(self, *args, **kwargs):
530
1331
self.remove_from_connection()
531
1332
except LookupError:
533
if hasattr(dbus.service.Object, u"__del__"):
534
dbus.service.Object.__del__(self, *args, **kwargs)
1334
if hasattr(DBusObjectWithProperties, "__del__"):
1335
DBusObjectWithProperties.__del__(self, *args, **kwargs)
535
1336
Client.__del__(self, *args, **kwargs)
537
1338
def checker_callback(self, pid, condition, command,
538
1339
*args, **kwargs):
539
1340
self.checker_callback_tag = None
540
1341
self.checker = None
542
self.PropertyChanged(dbus.String(u"checker_running"),
543
dbus.Boolean(False, variant_level=1))
544
1342
if os.WIFEXITED(condition):
545
1343
exitstatus = os.WEXITSTATUS(condition)
546
1344
# Emit D-Bus signal
556
1354
return Client.checker_callback(self, pid, condition, command,
557
1355
*args, **kwargs)
559
def checked_ok(self, *args, **kwargs):
560
r = Client.checked_ok(self, *args, **kwargs)
562
self.PropertyChanged(
563
dbus.String(u"last_checked_ok"),
564
(self._datetime_to_dbus(self.last_checked_ok,
568
1357
def start_checker(self, *args, **kwargs):
569
old_checker = self.checker
570
if self.checker is not None:
571
old_checker_pid = self.checker.pid
573
old_checker_pid = None
1358
old_checker_pid = getattr(self.checker, "pid", None)
574
1359
r = Client.start_checker(self, *args, **kwargs)
575
1360
# Only if new checker process was started
576
1361
if (self.checker is not None
577
1362
and old_checker_pid != self.checker.pid):
578
1363
# Emit D-Bus signal
579
1364
self.CheckerStarted(self.current_checker_command)
580
self.PropertyChanged(
581
dbus.String(u"checker_running"),
582
dbus.Boolean(True, variant_level=1))
585
def stop_checker(self, *args, **kwargs):
586
old_checker = getattr(self, u"checker", None)
587
r = Client.stop_checker(self, *args, **kwargs)
588
if (old_checker is not None
589
and getattr(self, u"checker", None) is None):
590
self.PropertyChanged(dbus.String(u"checker_running"),
591
dbus.Boolean(False, variant_level=1))
594
## D-Bus methods & signals
595
_interface = u"se.bsnet.fukt.Mandos.Client"
598
@dbus.service.method(_interface)
600
return self.checked_ok()
1367
def _reset_approved(self):
1368
self.approved = None
1371
def approve(self, value=True):
1372
self.approved = value
1373
gobject.timeout_add(int(self.approval_duration.total_seconds()
1374
* 1000), self._reset_approved)
1375
self.send_changedstate()
1377
## D-Bus methods, signals & properties
602
1383
# CheckerCompleted - signal
603
@dbus.service.signal(_interface, signature=u"nxs")
1384
@dbus.service.signal(_interface, signature="nxs")
604
1385
def CheckerCompleted(self, exitcode, waitstatus, command):
608
1389
# CheckerStarted - signal
609
@dbus.service.signal(_interface, signature=u"s")
1390
@dbus.service.signal(_interface, signature="s")
610
1391
def CheckerStarted(self, command):
614
# GetAllProperties - method
615
@dbus.service.method(_interface, out_signature=u"a{sv}")
616
def GetAllProperties(self):
618
return dbus.Dictionary({
619
dbus.String(u"name"):
620
dbus.String(self.name, variant_level=1),
621
dbus.String(u"fingerprint"):
622
dbus.String(self.fingerprint, variant_level=1),
623
dbus.String(u"host"):
624
dbus.String(self.host, variant_level=1),
625
dbus.String(u"created"):
626
self._datetime_to_dbus(self.created,
628
dbus.String(u"last_enabled"):
629
(self._datetime_to_dbus(self.last_enabled,
631
if self.last_enabled is not None
632
else dbus.Boolean(False, variant_level=1)),
633
dbus.String(u"enabled"):
634
dbus.Boolean(self.enabled, variant_level=1),
635
dbus.String(u"last_checked_ok"):
636
(self._datetime_to_dbus(self.last_checked_ok,
638
if self.last_checked_ok is not None
639
else dbus.Boolean (False, variant_level=1)),
640
dbus.String(u"timeout"):
641
dbus.UInt64(self.timeout_milliseconds(),
643
dbus.String(u"interval"):
644
dbus.UInt64(self.interval_milliseconds(),
646
dbus.String(u"checker"):
647
dbus.String(self.checker_command,
649
dbus.String(u"checker_running"):
650
dbus.Boolean(self.checker is not None,
652
dbus.String(u"object_path"):
653
dbus.ObjectPath(self.dbus_object_path,
657
# IsStillValid - method
658
@dbus.service.method(_interface, out_signature=u"b")
659
def IsStillValid(self):
660
return self.still_valid()
662
1395
# PropertyChanged - signal
663
@dbus.service.signal(_interface, signature=u"sv")
1396
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1397
@dbus.service.signal(_interface, signature="sv")
664
1398
def PropertyChanged(self, property, value):
668
# ReceivedSecret - signal
1402
# GotSecret - signal
669
1403
@dbus.service.signal(_interface)
670
def ReceivedSecret(self):
1404
def GotSecret(self):
1406
Is sent after a successful transfer of secret from the Mandos
1407
server to mandos-client
674
1411
# Rejected - signal
675
@dbus.service.signal(_interface)
1412
@dbus.service.signal(_interface, signature="s")
1413
def Rejected(self, reason):
680
# SetChecker - method
681
@dbus.service.method(_interface, in_signature=u"s")
682
def SetChecker(self, checker):
683
"D-Bus setter method"
684
self.checker_command = checker
686
self.PropertyChanged(dbus.String(u"checker"),
687
dbus.String(self.checker_command,
691
@dbus.service.method(_interface, in_signature=u"s")
692
def SetHost(self, host):
693
"D-Bus setter method"
696
self.PropertyChanged(dbus.String(u"host"),
697
dbus.String(self.host, variant_level=1))
699
# SetInterval - method
700
@dbus.service.method(_interface, in_signature=u"t")
701
def SetInterval(self, milliseconds):
702
self.interval = datetime.timedelta(0, 0, 0, milliseconds)
704
self.PropertyChanged(dbus.String(u"interval"),
705
(dbus.UInt64(self.interval_milliseconds(),
709
@dbus.service.method(_interface, in_signature=u"ay",
711
def SetSecret(self, secret):
712
"D-Bus setter method"
713
self.secret = str(secret)
715
# SetTimeout - method
716
@dbus.service.method(_interface, in_signature=u"t")
717
def SetTimeout(self, milliseconds):
718
self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
720
self.PropertyChanged(dbus.String(u"timeout"),
721
(dbus.UInt64(self.timeout_milliseconds(),
1417
# NeedApproval - signal
1418
@dbus.service.signal(_interface, signature="tb")
1419
def NeedApproval(self, timeout, default):
1421
return self.need_approval()
1426
@dbus.service.method(_interface, in_signature="b")
1427
def Approve(self, value):
1430
# CheckedOK - method
1431
@dbus.service.method(_interface)
1432
def CheckedOK(self):
724
1435
# Enable - method
725
1436
@dbus.service.method(_interface)
744
1455
def StopChecker(self):
745
1456
self.stop_checker()
1460
# ApprovalPending - property
1461
@dbus_service_property(_interface, signature="b", access="read")
1462
def ApprovalPending_dbus_property(self):
1463
return dbus.Boolean(bool(self.approvals_pending))
1465
# ApprovedByDefault - property
1466
@dbus_service_property(_interface, signature="b",
1468
def ApprovedByDefault_dbus_property(self, value=None):
1469
if value is None: # get
1470
return dbus.Boolean(self.approved_by_default)
1471
self.approved_by_default = bool(value)
1473
# ApprovalDelay - property
1474
@dbus_service_property(_interface, signature="t",
1476
def ApprovalDelay_dbus_property(self, value=None):
1477
if value is None: # get
1478
return dbus.UInt64(self.approval_delay.total_seconds()
1480
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1482
# ApprovalDuration - property
1483
@dbus_service_property(_interface, signature="t",
1485
def ApprovalDuration_dbus_property(self, value=None):
1486
if value is None: # get
1487
return dbus.UInt64(self.approval_duration.total_seconds()
1489
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1492
@dbus_service_property(_interface, signature="s", access="read")
1493
def Name_dbus_property(self):
1494
return dbus.String(self.name)
1496
# Fingerprint - property
1497
@dbus_service_property(_interface, signature="s", access="read")
1498
def Fingerprint_dbus_property(self):
1499
return dbus.String(self.fingerprint)
1502
@dbus_service_property(_interface, signature="s",
1504
def Host_dbus_property(self, value=None):
1505
if value is None: # get
1506
return dbus.String(self.host)
1507
self.host = str(value)
1509
# Created - property
1510
@dbus_service_property(_interface, signature="s", access="read")
1511
def Created_dbus_property(self):
1512
return datetime_to_dbus(self.created)
1514
# LastEnabled - property
1515
@dbus_service_property(_interface, signature="s", access="read")
1516
def LastEnabled_dbus_property(self):
1517
return datetime_to_dbus(self.last_enabled)
1519
# Enabled - property
1520
@dbus_service_property(_interface, signature="b",
1522
def Enabled_dbus_property(self, value=None):
1523
if value is None: # get
1524
return dbus.Boolean(self.enabled)
1530
# LastCheckedOK - property
1531
@dbus_service_property(_interface, signature="s",
1533
def LastCheckedOK_dbus_property(self, value=None):
1534
if value is not None:
1537
return datetime_to_dbus(self.last_checked_ok)
1539
# LastCheckerStatus - property
1540
@dbus_service_property(_interface, signature="n",
1542
def LastCheckerStatus_dbus_property(self):
1543
return dbus.Int16(self.last_checker_status)
1545
# Expires - property
1546
@dbus_service_property(_interface, signature="s", access="read")
1547
def Expires_dbus_property(self):
1548
return datetime_to_dbus(self.expires)
1550
# LastApprovalRequest - property
1551
@dbus_service_property(_interface, signature="s", access="read")
1552
def LastApprovalRequest_dbus_property(self):
1553
return datetime_to_dbus(self.last_approval_request)
1555
# Timeout - property
1556
@dbus_service_property(_interface, signature="t",
1558
def Timeout_dbus_property(self, value=None):
1559
if value is None: # get
1560
return dbus.UInt64(self.timeout.total_seconds() * 1000)
1561
old_timeout = self.timeout
1562
self.timeout = datetime.timedelta(0, 0, 0, value)
1563
# Reschedule disabling
1565
now = datetime.datetime.utcnow()
1566
self.expires += self.timeout - old_timeout
1567
if self.expires <= now:
1568
# The timeout has passed
1571
if (getattr(self, "disable_initiator_tag", None)
1574
gobject.source_remove(self.disable_initiator_tag)
1575
self.disable_initiator_tag = (
1576
gobject.timeout_add(
1577
int((self.expires - now).total_seconds()
1578
* 1000), self.disable))
1580
# ExtendedTimeout - property
1581
@dbus_service_property(_interface, signature="t",
1583
def ExtendedTimeout_dbus_property(self, value=None):
1584
if value is None: # get
1585
return dbus.UInt64(self.extended_timeout.total_seconds()
1587
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1589
# Interval - property
1590
@dbus_service_property(_interface, signature="t",
1592
def Interval_dbus_property(self, value=None):
1593
if value is None: # get
1594
return dbus.UInt64(self.interval.total_seconds() * 1000)
1595
self.interval = datetime.timedelta(0, 0, 0, value)
1596
if getattr(self, "checker_initiator_tag", None) is None:
1599
# Reschedule checker run
1600
gobject.source_remove(self.checker_initiator_tag)
1601
self.checker_initiator_tag = (gobject.timeout_add
1602
(value, self.start_checker))
1603
self.start_checker() # Start one now, too
1605
# Checker - property
1606
@dbus_service_property(_interface, signature="s",
1608
def Checker_dbus_property(self, value=None):
1609
if value is None: # get
1610
return dbus.String(self.checker_command)
1611
self.checker_command = str(value)
1613
# CheckerRunning - property
1614
@dbus_service_property(_interface, signature="b",
1616
def CheckerRunning_dbus_property(self, value=None):
1617
if value is None: # get
1618
return dbus.Boolean(self.checker is not None)
1620
self.start_checker()
1624
# ObjectPath - property
1625
@dbus_service_property(_interface, signature="o", access="read")
1626
def ObjectPath_dbus_property(self):
1627
return self.dbus_object_path # is already a dbus.ObjectPath
1630
@dbus_service_property(_interface, signature="ay",
1631
access="write", byte_arrays=True)
1632
def Secret_dbus_property(self, value):
1633
self.secret = bytes(value)
1638
class ProxyClient(object):
1639
def __init__(self, child_pipe, fpr, address):
1640
self._pipe = child_pipe
1641
self._pipe.send(('init', fpr, address))
1642
if not self._pipe.recv():
1645
def __getattribute__(self, name):
1647
return super(ProxyClient, self).__getattribute__(name)
1648
self._pipe.send(('getattr', name))
1649
data = self._pipe.recv()
1650
if data[0] == 'data':
1652
if data[0] == 'function':
1653
def func(*args, **kwargs):
1654
self._pipe.send(('funcall', name, args, kwargs))
1655
return self._pipe.recv()[1]
1658
def __setattr__(self, name, value):
1660
return super(ProxyClient, self).__setattr__(name, value)
1661
self._pipe.send(('setattr', name, value))
750
1664
class ClientHandler(socketserver.BaseRequestHandler, object):
751
1665
"""A class to handle client connections.
754
1668
Note: This will run in its own forked process."""
756
1670
def handle(self):
757
logger.info(u"TCP connection from: %s",
758
unicode(self.client_address))
759
logger.debug(u"IPC Pipe FD: %d", self.server.pipe[1])
760
# Open IPC pipe to parent process
761
with closing(os.fdopen(self.server.pipe[1], u"w", 1)) as ipc:
1671
with contextlib.closing(self.server.child_pipe) as child_pipe:
1672
logger.info("TCP connection from: %s",
1673
str(self.client_address))
1674
logger.debug("Pipe FD: %d",
1675
self.server.child_pipe.fileno())
762
1677
session = (gnutls.connection
763
1678
.ClientSession(self.request,
764
1679
gnutls.connection
765
1680
.X509Credentials()))
767
line = self.request.makefile().readline()
768
logger.debug(u"Protocol version: %r", line)
770
if int(line.strip().split()[0]) > 1:
772
except (ValueError, IndexError, RuntimeError), error:
773
logger.error(u"Unknown protocol version: %s", error)
776
1682
# Note: gnutls.connection.X509Credentials is really a
777
1683
# generic GnuTLS certificate credentials object so long as
778
1684
# no X.509 keys are added to it. Therefore, we can use it
779
1685
# here despite using OpenPGP certificates.
781
#priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
782
# u"+AES-256-CBC", u"+SHA1",
783
# u"+COMP-NULL", u"+CTYPE-OPENPGP",
1687
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1688
# "+AES-256-CBC", "+SHA1",
1689
# "+COMP-NULL", "+CTYPE-OPENPGP",
785
1691
# Use a fallback default, since this MUST be set.
786
1692
priority = self.server.gnutls_priority
787
1693
if priority is None:
789
1695
(gnutls.library.functions
790
1696
.gnutls_priority_set_direct(session._c_object,
791
1697
priority, None))
1699
# Start communication using the Mandos protocol
1700
# Get protocol number
1701
line = self.request.makefile().readline()
1702
logger.debug("Protocol version: %r", line)
1704
if int(line.strip().split()[0]) > 1:
1705
raise RuntimeError(line)
1706
except (ValueError, IndexError, RuntimeError) as error:
1707
logger.error("Unknown protocol version: %s", error)
1710
# Start GnuTLS connection
794
1712
session.handshake()
795
except gnutls.errors.GNUTLSError, error:
796
logger.warning(u"Handshake failed: %s", error)
1713
except gnutls.errors.GNUTLSError as error:
1714
logger.warning("Handshake failed: %s", error)
797
1715
# Do not run session.bye() here: the session is not
798
1716
# established. Just abandon the request.
800
logger.debug(u"Handshake succeeded")
1718
logger.debug("Handshake succeeded")
1720
approval_required = False
802
fpr = self.fingerprint(self.peer_certificate(session))
803
except (TypeError, gnutls.errors.GNUTLSError), error:
804
logger.warning(u"Bad certificate: %s", error)
807
logger.debug(u"Fingerprint: %s", fpr)
1723
fpr = self.fingerprint(self.peer_certificate
1726
gnutls.errors.GNUTLSError) as error:
1727
logger.warning("Bad certificate: %s", error)
1729
logger.debug("Fingerprint: %s", fpr)
1732
client = ProxyClient(child_pipe, fpr,
1733
self.client_address)
1737
if client.approval_delay:
1738
delay = client.approval_delay
1739
client.approvals_pending += 1
1740
approval_required = True
1743
if not client.enabled:
1744
logger.info("Client %s is disabled",
1746
if self.server.use_dbus:
1748
client.Rejected("Disabled")
1751
if client.approved or not client.approval_delay:
1752
#We are approved or approval is disabled
1754
elif client.approved is None:
1755
logger.info("Client %s needs approval",
1757
if self.server.use_dbus:
1759
client.NeedApproval(
1760
client.approval_delay.total_seconds()
1761
* 1000, client.approved_by_default)
1763
logger.warning("Client %s was not approved",
1765
if self.server.use_dbus:
1767
client.Rejected("Denied")
1770
#wait until timeout or approved
1771
time = datetime.datetime.now()
1772
client.changedstate.acquire()
1773
client.changedstate.wait(delay.total_seconds())
1774
client.changedstate.release()
1775
time2 = datetime.datetime.now()
1776
if (time2 - time) >= delay:
1777
if not client.approved_by_default:
1778
logger.warning("Client %s timed out while"
1779
" waiting for approval",
1781
if self.server.use_dbus:
1783
client.Rejected("Approval timed out")
1788
delay -= time2 - time
1791
while sent_size < len(client.secret):
1793
sent = session.send(client.secret[sent_size:])
1794
except gnutls.errors.GNUTLSError as error:
1795
logger.warning("gnutls send failed",
1798
logger.debug("Sent: %d, remaining: %d",
1799
sent, len(client.secret)
1800
- (sent_size + sent))
1803
logger.info("Sending secret to %s", client.name)
1804
# bump the timeout using extended_timeout
1805
client.bump_timeout(client.extended_timeout)
1806
if self.server.use_dbus:
809
for c in self.server.clients:
810
if c.fingerprint == fpr:
814
ipc.write(u"NOTFOUND %s\n" % fpr)
817
# Have to check if client.still_valid(), since it is
818
# possible that the client timed out while establishing
819
# the GnuTLS session.
820
if not client.still_valid():
821
ipc.write(u"INVALID %s\n" % client.name)
824
ipc.write(u"SENDING %s\n" % client.name)
826
while sent_size < len(client.secret):
827
sent = session.send(client.secret[sent_size:])
828
logger.debug(u"Sent: %d, remaining: %d",
829
sent, len(client.secret)
830
- (sent_size + sent))
1811
if approval_required:
1812
client.approvals_pending -= 1
1815
except gnutls.errors.GNUTLSError as error:
1816
logger.warning("GnuTLS bye failed",
835
1820
def peer_certificate(session):
982
2018
clients: set of Client objects
983
2019
gnutls_priority GnuTLS priority string
984
2020
use_dbus: Boolean; to emit D-Bus signals or not
985
clients: set of Client objects
986
gnutls_priority GnuTLS priority string
987
use_dbus: Boolean; to emit D-Bus signals or not
989
2022
Assumes a gobject.MainLoop event loop.
991
2024
def __init__(self, server_address, RequestHandlerClass,
992
2025
interface=None, use_ipv6=True, clients=None,
993
gnutls_priority=None, use_dbus=True):
2026
gnutls_priority=None, use_dbus=True, socketfd=None):
994
2027
self.enabled = False
995
2028
self.clients = clients
996
2029
if self.clients is None:
998
2031
self.use_dbus = use_dbus
999
2032
self.gnutls_priority = gnutls_priority
1000
2033
IPv6_TCPServer.__init__(self, server_address,
1001
2034
RequestHandlerClass,
1002
2035
interface = interface,
1003
use_ipv6 = use_ipv6)
2036
use_ipv6 = use_ipv6,
2037
socketfd = socketfd)
1004
2038
def server_activate(self):
1005
2039
if self.enabled:
1006
2040
return socketserver.TCPServer.server_activate(self)
1007
2042
def enable(self):
1008
2043
self.enabled = True
1009
def add_pipe(self, pipe):
2045
def add_pipe(self, parent_pipe, proc):
1010
2046
# Call "handle_ipc" for both data and EOF events
1011
gobject.io_add_watch(pipe, gobject.IO_IN | gobject.IO_HUP,
1013
def handle_ipc(self, source, condition, file_objects={}):
1015
gobject.IO_IN: u"IN", # There is data to read.
1016
gobject.IO_OUT: u"OUT", # Data can be written (without
1018
gobject.IO_PRI: u"PRI", # There is urgent data to read.
1019
gobject.IO_ERR: u"ERR", # Error condition.
1020
gobject.IO_HUP: u"HUP" # Hung up (the connection has been
1021
# broken, usually for pipes and
1024
conditions_string = ' | '.join(name
1026
condition_names.iteritems()
1027
if cond & condition)
1028
logger.debug(u"Handling IPC: FD = %d, condition = %s", source,
1031
# Turn the pipe file descriptor into a Python file object
1032
if source not in file_objects:
1033
file_objects[source] = os.fdopen(source, u"r", 1)
1035
# Read a line from the file object
1036
cmdline = file_objects[source].readline()
1037
if not cmdline: # Empty line means end of file
1038
# close the IPC pipe
1039
file_objects[source].close()
1040
del file_objects[source]
1042
# Stop calling this function
1045
logger.debug(u"IPC command: %r", cmdline)
1047
# Parse and act on command
1048
cmd, args = cmdline.rstrip(u"\r\n").split(None, 1)
1050
if cmd == u"NOTFOUND":
1051
logger.warning(u"Client not found for fingerprint: %s",
1055
mandos_dbus_service.ClientNotFound(args)
1056
elif cmd == u"INVALID":
1057
for client in self.clients:
1058
if client.name == args:
1059
logger.warning(u"Client %s is invalid", args)
1065
logger.error(u"Unknown client %s is invalid", args)
1066
elif cmd == u"SENDING":
1067
for client in self.clients:
1068
if client.name == args:
1069
logger.info(u"Sending secret to %s", client.name)
1073
client.ReceivedSecret()
1076
logger.error(u"Sending secret to unknown client %s",
2047
gobject.io_add_watch(parent_pipe.fileno(),
2048
gobject.IO_IN | gobject.IO_HUP,
2049
functools.partial(self.handle_ipc,
2054
def handle_ipc(self, source, condition, parent_pipe=None,
2055
proc = None, client_object=None):
2056
# error, or the other end of multiprocessing.Pipe has closed
2057
if condition & (gobject.IO_ERR | gobject.IO_HUP):
2058
# Wait for other process to exit
2062
# Read a request from the child
2063
request = parent_pipe.recv()
2064
command = request[0]
2066
if command == 'init':
2068
address = request[2]
2070
for c in self.clients.itervalues():
2071
if c.fingerprint == fpr:
2075
logger.info("Client not found for fingerprint: %s, ad"
2076
"dress: %s", fpr, address)
2079
mandos_dbus_service.ClientNotFound(fpr,
2081
parent_pipe.send(False)
2084
gobject.io_add_watch(parent_pipe.fileno(),
2085
gobject.IO_IN | gobject.IO_HUP,
2086
functools.partial(self.handle_ipc,
2092
parent_pipe.send(True)
2093
# remove the old hook in favor of the new above hook on
2096
if command == 'funcall':
2097
funcname = request[1]
2101
parent_pipe.send(('data', getattr(client_object,
2105
if command == 'getattr':
2106
attrname = request[1]
2107
if callable(client_object.__getattribute__(attrname)):
2108
parent_pipe.send(('function',))
2110
parent_pipe.send(('data', client_object
2111
.__getattribute__(attrname)))
2113
if command == 'setattr':
2114
attrname = request[1]
2116
setattr(client_object, attrname, value)
2121
def rfc3339_duration_to_delta(duration):
2122
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2124
>>> rfc3339_duration_to_delta("P7D")
2125
datetime.timedelta(7)
2126
>>> rfc3339_duration_to_delta("PT60S")
2127
datetime.timedelta(0, 60)
2128
>>> rfc3339_duration_to_delta("PT60M")
2129
datetime.timedelta(0, 3600)
2130
>>> rfc3339_duration_to_delta("PT24H")
2131
datetime.timedelta(1)
2132
>>> rfc3339_duration_to_delta("P1W")
2133
datetime.timedelta(7)
2134
>>> rfc3339_duration_to_delta("PT5M30S")
2135
datetime.timedelta(0, 330)
2136
>>> rfc3339_duration_to_delta("P1DT3M20S")
2137
datetime.timedelta(1, 200)
2140
# Parsing an RFC 3339 duration with regular expressions is not
2141
# possible - there would have to be multiple places for the same
2142
# values, like seconds. The current code, while more esoteric, is
2143
# cleaner without depending on a parsing library. If Python had a
2144
# built-in library for parsing we would use it, but we'd like to
2145
# avoid excessive use of external libraries.
2147
# New type for defining tokens, syntax, and semantics all-in-one
2148
Token = collections.namedtuple("Token",
2149
("regexp", # To match token; if
2150
# "value" is not None,
2151
# must have a "group"
2153
"value", # datetime.timedelta or
2155
"followers")) # Tokens valid after
2157
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2158
# the "duration" ABNF definition in RFC 3339, Appendix A.
2159
token_end = Token(re.compile(r"$"), None, frozenset())
2160
token_second = Token(re.compile(r"(\d+)S"),
2161
datetime.timedelta(seconds=1),
2162
frozenset((token_end,)))
2163
token_minute = Token(re.compile(r"(\d+)M"),
2164
datetime.timedelta(minutes=1),
2165
frozenset((token_second, token_end)))
2166
token_hour = Token(re.compile(r"(\d+)H"),
2167
datetime.timedelta(hours=1),
2168
frozenset((token_minute, token_end)))
2169
token_time = Token(re.compile(r"T"),
2171
frozenset((token_hour, token_minute,
2173
token_day = Token(re.compile(r"(\d+)D"),
2174
datetime.timedelta(days=1),
2175
frozenset((token_time, token_end)))
2176
token_month = Token(re.compile(r"(\d+)M"),
2177
datetime.timedelta(weeks=4),
2178
frozenset((token_day, token_end)))
2179
token_year = Token(re.compile(r"(\d+)Y"),
2180
datetime.timedelta(weeks=52),
2181
frozenset((token_month, token_end)))
2182
token_week = Token(re.compile(r"(\d+)W"),
2183
datetime.timedelta(weeks=1),
2184
frozenset((token_end,)))
2185
token_duration = Token(re.compile(r"P"), None,
2186
frozenset((token_year, token_month,
2187
token_day, token_time,
2189
# Define starting values
2190
value = datetime.timedelta() # Value so far
2192
followers = frozenset((token_duration,)) # Following valid tokens
2193
s = duration # String left to parse
2194
# Loop until end token is found
2195
while found_token is not token_end:
2196
# Search for any currently valid tokens
2197
for token in followers:
2198
match = token.regexp.match(s)
2199
if match is not None:
2201
if token.value is not None:
2202
# Value found, parse digits
2203
factor = int(match.group(1), 10)
2204
# Add to value so far
2205
value += factor * token.value
2206
# Strip token from string
2207
s = token.regexp.sub("", s, 1)
2210
# Set valid next tokens
2211
followers = found_token.followers
1079
logger.error(u"Unknown IPC command: %r", cmdline)
1081
# Keep calling this function
2214
# No currently valid tokens were found
2215
raise ValueError("Invalid RFC 3339 duration")
1085
2220
def string_to_delta(interval):
1086
2221
"""Parse a string and return a datetime.timedelta
1088
>>> string_to_delta(u'7d')
2223
>>> string_to_delta('7d')
1089
2224
datetime.timedelta(7)
1090
>>> string_to_delta(u'60s')
2225
>>> string_to_delta('60s')
1091
2226
datetime.timedelta(0, 60)
1092
>>> string_to_delta(u'60m')
2227
>>> string_to_delta('60m')
1093
2228
datetime.timedelta(0, 3600)
1094
>>> string_to_delta(u'24h')
2229
>>> string_to_delta('24h')
1095
2230
datetime.timedelta(1)
1096
>>> string_to_delta(u'1w')
2231
>>> string_to_delta('1w')
1097
2232
datetime.timedelta(7)
1098
>>> string_to_delta(u'5m 30s')
2233
>>> string_to_delta('5m 30s')
1099
2234
datetime.timedelta(0, 330)
2238
return rfc3339_duration_to_delta(interval)
1101
2242
timevalue = datetime.timedelta(0)
1102
2243
for s in interval.split():
1104
suffix = unicode(s[-1])
1105
2246
value = int(s[:-1])
1107
2248
delta = datetime.timedelta(value)
1108
elif suffix == u"s":
1109
2250
delta = datetime.timedelta(0, value)
1110
elif suffix == u"m":
1111
2252
delta = datetime.timedelta(0, 0, 0, 0, value)
1112
elif suffix == u"h":
1113
2254
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
1114
elif suffix == u"w":
1115
2256
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1118
except (ValueError, IndexError):
2258
raise ValueError("Unknown suffix {!r}"
2260
except IndexError as e:
2261
raise ValueError(*(e.args))
1120
2262
timevalue += delta
1121
2263
return timevalue
1124
def if_nametoindex(interface):
1125
"""Call the C function if_nametoindex(), or equivalent
1127
Note: This function cannot accept a unicode string."""
1128
global if_nametoindex
1130
if_nametoindex = (ctypes.cdll.LoadLibrary
1131
(ctypes.util.find_library(u"c"))
1133
except (OSError, AttributeError):
1134
logger.warning(u"Doing if_nametoindex the hard way")
1135
def if_nametoindex(interface):
1136
"Get an interface index the hard way, i.e. using fcntl()"
1137
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1138
with closing(socket.socket()) as s:
1139
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1140
struct.pack(str(u"16s16x"),
1142
interface_index = struct.unpack(str(u"I"),
1144
return interface_index
1145
return if_nametoindex(interface)
1148
2266
def daemon(nochdir = False, noclose = False):
1149
2267
"""See daemon(3). Standard BSD Unix function.
1174
######################################################################
2292
##################################################################
1175
2293
# Parsing of options, both command line and config file
1177
parser = optparse.OptionParser(version = "%%prog %s" % version)
1178
parser.add_option("-i", u"--interface", type=u"string",
1179
metavar="IF", help=u"Bind to interface IF")
1180
parser.add_option("-a", u"--address", type=u"string",
1181
help=u"Address to listen for requests on")
1182
parser.add_option("-p", u"--port", type=u"int",
1183
help=u"Port number to receive requests on")
1184
parser.add_option("--check", action=u"store_true",
1185
help=u"Run self-test")
1186
parser.add_option("--debug", action=u"store_true",
1187
help=u"Debug mode; run in foreground and log to"
1189
parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1190
u" priority string (see GnuTLS documentation)")
1191
parser.add_option("--servicename", type=u"string",
1192
metavar=u"NAME", help=u"Zeroconf service name")
1193
parser.add_option("--configdir", type=u"string",
1194
default=u"/etc/mandos", metavar=u"DIR",
1195
help=u"Directory to search for configuration"
1197
parser.add_option("--no-dbus", action=u"store_false",
1198
dest=u"use_dbus", help=u"Do not provide D-Bus"
1199
u" system bus interface")
1200
parser.add_option("--no-ipv6", action=u"store_false",
1201
dest=u"use_ipv6", help=u"Do not use IPv6")
1202
options = parser.parse_args()[0]
2295
parser = argparse.ArgumentParser()
2296
parser.add_argument("-v", "--version", action="version",
2297
version = "%(prog)s {}".format(version),
2298
help="show version number and exit")
2299
parser.add_argument("-i", "--interface", metavar="IF",
2300
help="Bind to interface IF")
2301
parser.add_argument("-a", "--address",
2302
help="Address to listen for requests on")
2303
parser.add_argument("-p", "--port", type=int,
2304
help="Port number to receive requests on")
2305
parser.add_argument("--check", action="store_true",
2306
help="Run self-test")
2307
parser.add_argument("--debug", action="store_true",
2308
help="Debug mode; run in foreground and log"
2309
" to terminal", default=None)
2310
parser.add_argument("--debuglevel", metavar="LEVEL",
2311
help="Debug level for stdout output")
2312
parser.add_argument("--priority", help="GnuTLS"
2313
" priority string (see GnuTLS documentation)")
2314
parser.add_argument("--servicename",
2315
metavar="NAME", help="Zeroconf service name")
2316
parser.add_argument("--configdir",
2317
default="/etc/mandos", metavar="DIR",
2318
help="Directory to search for configuration"
2320
parser.add_argument("--no-dbus", action="store_false",
2321
dest="use_dbus", help="Do not provide D-Bus"
2322
" system bus interface", default=None)
2323
parser.add_argument("--no-ipv6", action="store_false",
2324
dest="use_ipv6", help="Do not use IPv6",
2326
parser.add_argument("--no-restore", action="store_false",
2327
dest="restore", help="Do not restore stored"
2328
" state", default=None)
2329
parser.add_argument("--socket", type=int,
2330
help="Specify a file descriptor to a network"
2331
" socket to use instead of creating one")
2332
parser.add_argument("--statedir", metavar="DIR",
2333
help="Directory to save/restore state in")
2334
parser.add_argument("--foreground", action="store_true",
2335
help="Run in foreground", default=None)
2336
parser.add_argument("--no-zeroconf", action="store_false",
2337
dest="zeroconf", help="Do not use Zeroconf",
2340
options = parser.parse_args()
1204
2342
if options.check:
2344
fail_count, test_count = doctest.testmod()
2345
sys.exit(os.EX_OK if fail_count == 0 else 1)
1209
2347
# Default values for config file for server-global settings
1210
server_defaults = { u"interface": u"",
1215
u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1216
u"servicename": u"Mandos",
1217
u"use_dbus": u"True",
1218
u"use_ipv6": u"True",
2348
server_defaults = { "interface": "",
2353
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:+SIGN-RSA-SHA224:+SIGN-RSA-RMD160",
2354
"servicename": "Mandos",
2360
"statedir": "/var/lib/mandos",
2361
"foreground": "False",
1221
2365
# Parse config file for server-global settings
1222
2366
server_config = configparser.SafeConfigParser(server_defaults)
1223
2367
del server_defaults
1224
2368
server_config.read(os.path.join(options.configdir,
1226
2370
# Convert the SafeConfigParser object to a dict
1227
2371
server_settings = server_config.defaults()
1228
2372
# Use the appropriate methods on the non-string config options
1229
for option in (u"debug", u"use_dbus", u"use_ipv6"):
1230
server_settings[option] = server_config.getboolean(u"DEFAULT",
2373
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
2374
server_settings[option] = server_config.getboolean("DEFAULT",
1232
2376
if server_settings["port"]:
1233
server_settings["port"] = server_config.getint(u"DEFAULT",
2377
server_settings["port"] = server_config.getint("DEFAULT",
2379
if server_settings["socket"]:
2380
server_settings["socket"] = server_config.getint("DEFAULT",
2382
# Later, stdin will, and stdout and stderr might, be dup'ed
2383
# over with an opened os.devnull. But we don't want this to
2384
# happen with a supplied network socket.
2385
if 0 <= server_settings["socket"] <= 2:
2386
server_settings["socket"] = os.dup(server_settings
1235
2388
del server_config
1237
2390
# Override the settings from the config file with command line
1238
2391
# options, if set.
1239
for option in (u"interface", u"address", u"port", u"debug",
1240
u"priority", u"servicename", u"configdir",
1241
u"use_dbus", u"use_ipv6"):
2392
for option in ("interface", "address", "port", "debug",
2393
"priority", "servicename", "configdir",
2394
"use_dbus", "use_ipv6", "debuglevel", "restore",
2395
"statedir", "socket", "foreground", "zeroconf"):
1242
2396
value = getattr(options, option)
1243
2397
if value is not None:
1244
2398
server_settings[option] = value
1246
2400
# Force all strings to be unicode
1247
2401
for option in server_settings.keys():
1248
if type(server_settings[option]) is str:
1249
server_settings[option] = unicode(server_settings[option])
2402
if isinstance(server_settings[option], bytes):
2403
server_settings[option] = (server_settings[option]
2405
# Force all boolean options to be boolean
2406
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2407
"foreground", "zeroconf"):
2408
server_settings[option] = bool(server_settings[option])
2409
# Debug implies foreground
2410
if server_settings["debug"]:
2411
server_settings["foreground"] = True
1250
2412
# Now we have our good server settings in "server_settings"
1252
2414
##################################################################
2416
if (not server_settings["zeroconf"] and
2417
not (server_settings["port"]
2418
or server_settings["socket"] != "")):
2419
parser.error("Needs port or socket to work without"
1254
2422
# For convenience
1255
debug = server_settings[u"debug"]
1256
use_dbus = server_settings[u"use_dbus"]
1257
use_ipv6 = server_settings[u"use_ipv6"]
1260
syslogger.setLevel(logging.WARNING)
1261
console.setLevel(logging.WARNING)
1263
if server_settings[u"servicename"] != u"Mandos":
2423
debug = server_settings["debug"]
2424
debuglevel = server_settings["debuglevel"]
2425
use_dbus = server_settings["use_dbus"]
2426
use_ipv6 = server_settings["use_ipv6"]
2427
stored_state_path = os.path.join(server_settings["statedir"],
2429
foreground = server_settings["foreground"]
2430
zeroconf = server_settings["zeroconf"]
2433
initlogger(debug, logging.DEBUG)
2438
level = getattr(logging, debuglevel.upper())
2439
initlogger(debug, level)
2441
if server_settings["servicename"] != "Mandos":
1264
2442
syslogger.setFormatter(logging.Formatter
1265
(u'Mandos (%s) [%%(process)d]:'
1266
u' %%(levelname)s: %%(message)s'
1267
% server_settings[u"servicename"]))
2443
('Mandos ({}) [%(process)d]:'
2444
' %(levelname)s: %(message)s'
2445
.format(server_settings
1269
2448
# Parse config file with clients
1270
client_defaults = { u"timeout": u"1h",
1272
u"checker": u"fping -q -- %%(host)s",
1275
client_config = configparser.SafeConfigParser(client_defaults)
1276
client_config.read(os.path.join(server_settings[u"configdir"],
2449
client_config = configparser.SafeConfigParser(Client
2451
client_config.read(os.path.join(server_settings["configdir"],
1279
2454
global mandos_dbus_service
1280
2455
mandos_dbus_service = None
1282
tcp_server = MandosServer((server_settings[u"address"],
1283
server_settings[u"port"]),
2458
if server_settings["socket"] != "":
2459
socketfd = server_settings["socket"]
2460
tcp_server = MandosServer((server_settings["address"],
2461
server_settings["port"]),
1285
interface=server_settings[u"interface"],
2463
interface=(server_settings["interface"]
1286
2465
use_ipv6=use_ipv6,
1287
2466
gnutls_priority=
1288
server_settings[u"priority"],
1290
pidfilename = u"/var/run/mandos.pid"
1292
pidfile = open(pidfilename, u"w")
1294
logger.error(u"Could not open file %r", pidfilename)
2467
server_settings["priority"],
2471
pidfilename = "/run/mandos.pid"
2472
if not os.path.isdir("/run/."):
2473
pidfilename = "/var/run/mandos.pid"
2476
pidfile = open(pidfilename, "w")
2477
except IOError as e:
2478
logger.error("Could not open file %r", pidfilename,
1297
uid = pwd.getpwnam(u"_mandos").pw_uid
1298
gid = pwd.getpwnam(u"_mandos").pw_gid
2481
for name in ("_mandos", "mandos", "nobody"):
1301
uid = pwd.getpwnam(u"mandos").pw_uid
1302
gid = pwd.getpwnam(u"mandos").pw_gid
2483
uid = pwd.getpwnam(name).pw_uid
2484
gid = pwd.getpwnam(name).pw_gid
1303
2486
except KeyError:
1305
uid = pwd.getpwnam(u"nobody").pw_uid
1306
gid = pwd.getpwnam(u"nobody").pw_gid
1313
except OSError, error:
1314
if error[0] != errno.EPERM:
2494
except OSError as error:
2495
if error.errno != errno.EPERM:
1317
# Enable all possible GnuTLS debugging
2499
# Enable all possible GnuTLS debugging
1319
2501
# "Use a log level over 10 to enable all debugging options."
1320
2502
# - GnuTLS manual
1321
2503
gnutls.library.functions.gnutls_global_set_log_level(11)
1323
2505
@gnutls.library.types.gnutls_log_func
1324
2506
def debug_gnutls(level, string):
1325
logger.debug(u"GnuTLS: %s", string[:-1])
2507
logger.debug("GnuTLS: %s", string[:-1])
1327
2509
(gnutls.library.functions
1328
2510
.gnutls_global_set_log_function(debug_gnutls))
2512
# Redirect stdin so all checkers get /dev/null
2513
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2514
os.dup2(null, sys.stdin.fileno())
2518
# Need to fork before connecting to D-Bus
2520
# Close all input and output, do double fork, etc.
2523
# multiprocessing will use threads, so before we use gobject we
2524
# need to inform gobject that threads will be used.
2525
gobject.threads_init()
1330
2527
global main_loop
1331
2528
# From the Avahi example code
1332
DBusGMainLoop(set_as_default=True )
2529
DBusGMainLoop(set_as_default=True)
1333
2530
main_loop = gobject.MainLoop()
1334
2531
bus = dbus.SystemBus()
1335
2532
# End of Avahi example code
1337
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
1338
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1339
service = AvahiService(name = server_settings[u"servicename"],
1340
servicetype = u"_mandos._tcp",
1341
protocol = protocol, bus = bus)
1342
if server_settings["interface"]:
1343
service.interface = (if_nametoindex
1344
(str(server_settings[u"interface"])))
2535
bus_name = dbus.service.BusName("se.recompile.Mandos",
2536
bus, do_not_queue=True)
2537
old_bus_name = (dbus.service.BusName
2538
("se.bsnet.fukt.Mandos", bus,
2540
except dbus.exceptions.NameExistsException as e:
2541
logger.error("Disabling D-Bus:", exc_info=e)
2543
server_settings["use_dbus"] = False
2544
tcp_server.use_dbus = False
2546
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2547
service = AvahiServiceToSyslog(name =
2548
server_settings["servicename"],
2549
servicetype = "_mandos._tcp",
2550
protocol = protocol, bus = bus)
2551
if server_settings["interface"]:
2552
service.interface = (if_nametoindex
2553
(server_settings["interface"]
2556
global multiprocessing_manager
2557
multiprocessing_manager = multiprocessing.Manager()
1346
2559
client_class = Client
1348
2561
client_class = functools.partial(ClientDBus, bus = bus)
1349
tcp_server.clients.update(set(
1350
client_class(name = section,
1351
config= dict(client_config.items(section)))
1352
for section in client_config.sections()))
2563
client_settings = Client.config_parser(client_config)
2564
old_client_settings = {}
2567
# This is used to redirect stdout and stderr for checker processes
2569
wnull = open(os.devnull, "w") # A writable /dev/null
2570
# Only used if server is running in foreground but not in debug
2572
if debug or not foreground:
2575
# Get client data and settings from last running state.
2576
if server_settings["restore"]:
2578
with open(stored_state_path, "rb") as stored_state:
2579
clients_data, old_client_settings = (pickle.load
2581
os.remove(stored_state_path)
2582
except IOError as e:
2583
if e.errno == errno.ENOENT:
2584
logger.warning("Could not load persistent state: {}"
2585
.format(os.strerror(e.errno)))
2587
logger.critical("Could not load persistent state:",
2590
except EOFError as e:
2591
logger.warning("Could not load persistent state: "
2592
"EOFError:", exc_info=e)
2594
with PGPEngine() as pgp:
2595
for client_name, client in clients_data.items():
2596
# Skip removed clients
2597
if client_name not in client_settings:
2600
# Decide which value to use after restoring saved state.
2601
# We have three different values: Old config file,
2602
# new config file, and saved state.
2603
# New config value takes precedence if it differs from old
2604
# config value, otherwise use saved state.
2605
for name, value in client_settings[client_name].items():
2607
# For each value in new config, check if it
2608
# differs from the old config value (Except for
2609
# the "secret" attribute)
2610
if (name != "secret" and
2611
value != old_client_settings[client_name]
2613
client[name] = value
2617
# Clients who has passed its expire date can still be
2618
# enabled if its last checker was successful. Clients
2619
# whose checker succeeded before we stored its state is
2620
# assumed to have successfully run all checkers during
2622
if client["enabled"]:
2623
if datetime.datetime.utcnow() >= client["expires"]:
2624
if not client["last_checked_ok"]:
2626
"disabling client {} - Client never "
2627
"performed a successful checker"
2628
.format(client_name))
2629
client["enabled"] = False
2630
elif client["last_checker_status"] != 0:
2632
"disabling client {} - Client last"
2633
" checker failed with error code {}"
2634
.format(client_name,
2635
client["last_checker_status"]))
2636
client["enabled"] = False
2638
client["expires"] = (datetime.datetime
2640
+ client["timeout"])
2641
logger.debug("Last checker succeeded,"
2642
" keeping {} enabled"
2643
.format(client_name))
2645
client["secret"] = (
2646
pgp.decrypt(client["encrypted_secret"],
2647
client_settings[client_name]
2650
# If decryption fails, we use secret from new settings
2651
logger.debug("Failed to decrypt {} old secret"
2652
.format(client_name))
2653
client["secret"] = (
2654
client_settings[client_name]["secret"])
2656
# Add/remove clients based on new changes made to config
2657
for client_name in (set(old_client_settings)
2658
- set(client_settings)):
2659
del clients_data[client_name]
2660
for client_name in (set(client_settings)
2661
- set(old_client_settings)):
2662
clients_data[client_name] = client_settings[client_name]
2664
# Create all client objects
2665
for client_name, client in clients_data.items():
2666
tcp_server.clients[client_name] = client_class(
2667
name = client_name, settings = client,
2668
server_settings = server_settings)
1353
2670
if not tcp_server.clients:
1354
logger.warning(u"No clients defined")
1357
# Redirect stdin so all checkers get /dev/null
1358
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1359
os.dup2(null, sys.stdin.fileno())
1363
# No console logging
1364
logger.removeHandler(console)
1365
# Close all input and output, do double fork, etc.
1369
with closing(pidfile):
1371
pidfile.write(str(pid) + "\n")
2671
logger.warning("No clients defined")
2674
if pidfile is not None:
2678
pidfile.write("{}\n".format(pid).encode("utf-8"))
2680
logger.error("Could not write to file %r with PID %d",
1374
logger.error(u"Could not write to file %r with PID %d",
1377
# "pidfile" was never created
1382
"Cleanup function; run on exit"
1385
while tcp_server.clients:
1386
client = tcp_server.clients.pop()
1387
client.disable_hook = None
1390
atexit.register(cleanup)
1393
signal.signal(signal.SIGINT, signal.SIG_IGN)
1394
2685
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1395
2686
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1398
class MandosDBusService(dbus.service.Object):
2689
@alternate_dbus_interfaces({"se.recompile.Mandos":
2690
"se.bsnet.fukt.Mandos"})
2691
class MandosDBusService(DBusObjectWithProperties):
1399
2692
"""A D-Bus proxy object"""
1400
2693
def __init__(self):
1401
dbus.service.Object.__init__(self, bus, u"/")
1402
_interface = u"se.bsnet.fukt.Mandos"
1404
@dbus.service.signal(_interface, signature=u"oa{sv}")
1405
def ClientAdded(self, objpath, properties):
1409
@dbus.service.signal(_interface, signature=u"s")
1410
def ClientNotFound(self, fingerprint):
1414
@dbus.service.signal(_interface, signature=u"os")
2694
dbus.service.Object.__init__(self, bus, "/")
2695
_interface = "se.recompile.Mandos"
2697
@dbus_interface_annotations(_interface)
2699
return { "org.freedesktop.DBus.Property"
2700
".EmitsChangedSignal":
2703
@dbus.service.signal(_interface, signature="o")
2704
def ClientAdded(self, objpath):
2708
@dbus.service.signal(_interface, signature="ss")
2709
def ClientNotFound(self, fingerprint, address):
2713
@dbus.service.signal(_interface, signature="os")
1415
2714
def ClientRemoved(self, objpath, name):
1419
@dbus.service.method(_interface, out_signature=u"ao")
2718
@dbus.service.method(_interface, out_signature="ao")
1420
2719
def GetAllClients(self):
1422
2721
return dbus.Array(c.dbus_object_path
1423
for c in tcp_server.clients)
2723
tcp_server.clients.itervalues())
1425
2725
@dbus.service.method(_interface,
1426
out_signature=u"a{oa{sv}}")
2726
out_signature="a{oa{sv}}")
1427
2727
def GetAllClientsWithProperties(self):
1429
2729
return dbus.Dictionary(
1430
((c.dbus_object_path, c.GetAllProperties())
1431
for c in tcp_server.clients),
1432
signature=u"oa{sv}")
2730
{ c.dbus_object_path: c.GetAll("")
2731
for c in tcp_server.clients.itervalues() },
1434
@dbus.service.method(_interface, in_signature=u"o")
2734
@dbus.service.method(_interface, in_signature="o")
1435
2735
def RemoveClient(self, object_path):
1437
for c in tcp_server.clients:
2737
for c in tcp_server.clients.itervalues():
1438
2738
if c.dbus_object_path == object_path:
1439
tcp_server.clients.remove(c)
2739
del tcp_server.clients[c.name]
1440
2740
c.remove_from_connection()
1441
2741
# Don't signal anything except ClientRemoved
1442
c.disable(signal=False)
2742
c.disable(quiet=True)
1443
2743
# Emit D-Bus signal
1444
2744
self.ClientRemoved(object_path, c.name)
2746
raise KeyError(object_path)
1450
2750
mandos_dbus_service = MandosDBusService()
1452
for client in tcp_server.clients:
2753
"Cleanup function; run on exit"
2757
multiprocessing.active_children()
2759
if not (tcp_server.clients or client_settings):
2762
# Store client before exiting. Secrets are encrypted with key
2763
# based on what config file has. If config file is
2764
# removed/edited, old secret will thus be unrecovable.
2766
with PGPEngine() as pgp:
2767
for client in tcp_server.clients.itervalues():
2768
key = client_settings[client.name]["secret"]
2769
client.encrypted_secret = pgp.encrypt(client.secret,
2773
# A list of attributes that can not be pickled
2775
exclude = { "bus", "changedstate", "secret",
2776
"checker", "server_settings" }
2777
for name, typ in (inspect.getmembers
2778
(dbus.service.Object)):
2781
client_dict["encrypted_secret"] = (client
2783
for attr in client.client_structure:
2784
if attr not in exclude:
2785
client_dict[attr] = getattr(client, attr)
2787
clients[client.name] = client_dict
2788
del client_settings[client.name]["secret"]
2791
with (tempfile.NamedTemporaryFile
2792
(mode='wb', suffix=".pickle", prefix='clients-',
2793
dir=os.path.dirname(stored_state_path),
2794
delete=False)) as stored_state:
2795
pickle.dump((clients, client_settings), stored_state)
2796
tempname=stored_state.name
2797
os.rename(tempname, stored_state_path)
2798
except (IOError, OSError) as e:
2804
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
2805
logger.warning("Could not save persistent state: {}"
2806
.format(os.strerror(e.errno)))
2808
logger.warning("Could not save persistent state:",
2812
# Delete all clients, and settings from config
2813
while tcp_server.clients:
2814
name, client = tcp_server.clients.popitem()
2816
client.remove_from_connection()
2817
# Don't signal anything except ClientRemoved
2818
client.disable(quiet=True)
2821
mandos_dbus_service.ClientRemoved(client
2824
client_settings.clear()
2826
atexit.register(cleanup)
2828
for client in tcp_server.clients.itervalues():
1454
2830
# Emit D-Bus signal
1455
mandos_dbus_service.ClientAdded(client.dbus_object_path,
1456
client.GetAllProperties())
2831
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2832
# Need to initiate checking of clients
2834
client.init_checker()
1459
2836
tcp_server.enable()
1460
2837
tcp_server.server_activate()
1462
2839
# Find out what port we got
1463
service.port = tcp_server.socket.getsockname()[1]
2841
service.port = tcp_server.socket.getsockname()[1]
1465
logger.info(u"Now listening on address %r, port %d,"
1466
" flowinfo %d, scope_id %d"
1467
% tcp_server.socket.getsockname())
2843
logger.info("Now listening on address %r, port %d,"
2844
" flowinfo %d, scope_id %d",
2845
*tcp_server.socket.getsockname())
1469
logger.info(u"Now listening on address %r, port %d"
1470
% tcp_server.socket.getsockname())
2847
logger.info("Now listening on address %r, port %d",
2848
*tcp_server.socket.getsockname())
1472
2850
#service.interface = tcp_server.socket.getsockname()[3]
1475
# From the Avahi example code
1478
except dbus.exceptions.DBusException, error:
1479
logger.critical(u"DBusException: %s", error)
1481
# End of Avahi example code
2854
# From the Avahi example code
2857
except dbus.exceptions.DBusException as error:
2858
logger.critical("D-Bus Exception", exc_info=error)
2861
# End of Avahi example code
1483
2863
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
1484
2864
lambda *args, **kwargs:
1485
2865
(tcp_server.handle_request
1486
2866
(*args[2:], **kwargs) or True))
1488
logger.debug(u"Starting main loop")
2868
logger.debug("Starting main loop")
1489
2869
main_loop.run()
1490
except AvahiError, error:
1491
logger.critical(u"AvahiError: %s", error)
2870
except AvahiError as error:
2871
logger.critical("Avahi Error", exc_info=error)
1493
2874
except KeyboardInterrupt:
1496
logger.debug(u"Server received KeyboardInterrupt")
1497
logger.debug(u"Server exiting")
2876
print("", file=sys.stderr)
2877
logger.debug("Server received KeyboardInterrupt")
2878
logger.debug("Server exiting")
2879
# Must run before the D-Bus bus name gets deregistered
1499
2882
if __name__ == '__main__':