88
100
except ImportError:
89
101
SO_BINDTODEVICE = None
103
if sys.version_info.major == 2:
92
107
stored_state_file = "clients.pickle"
94
109
logger = logging.getLogger()
95
syslogger = (logging.handlers.SysLogHandler
96
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
97
address = str("/dev/log")))
100
if_nametoindex = (ctypes.cdll.LoadLibrary
101
(ctypes.util.find_library("c"))
113
if_nametoindex = ctypes.cdll.LoadLibrary(
114
ctypes.util.find_library("c")).if_nametoindex
103
115
except (OSError, AttributeError):
104
117
def if_nametoindex(interface):
105
118
"Get an interface index the hard way, i.e. using fcntl()"
106
119
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
107
120
with contextlib.closing(socket.socket()) as s:
108
121
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
109
struct.pack(str("16s16x"),
111
interface_index = struct.unpack(str("I"),
122
struct.pack(b"16s16x", interface))
123
interface_index = struct.unpack("I", ifreq[16:20])[0]
113
124
return interface_index
116
127
def initlogger(debug, level=logging.WARNING):
117
128
"""init logger and add loglevel"""
131
syslogger = (logging.handlers.SysLogHandler(
132
facility = logging.handlers.SysLogHandler.LOG_DAEMON,
133
address = "/dev/log"))
119
134
syslogger.setFormatter(logging.Formatter
120
135
('Mandos [%(process)d]: %(levelname)s:'
273
296
self.entry_group_state_changed_match = None
298
def rename(self, remove=True):
276
299
"""Derived from the Avahi example code"""
277
300
if self.rename_count >= self.max_renames:
278
301
logger.critical("No suitable Zeroconf service name found"
279
302
" after %i retries, exiting.",
280
303
self.rename_count)
281
304
raise AvahiServiceError("Too many renames")
282
self.name = unicode(self.server
283
.GetAlternativeServiceName(self.name))
306
self.server.GetAlternativeServiceName(self.name))
307
self.rename_count += 1
284
308
logger.info("Changing Zeroconf service name to %r ...",
289
314
except dbus.exceptions.DBusException as error:
290
logger.critical("D-Bus Exception", exc_info=error)
293
self.rename_count += 1
315
if (error.get_dbus_name()
316
== "org.freedesktop.Avahi.CollisionError"):
317
logger.info("Local Zeroconf service name collision.")
318
return self.rename(remove=False)
320
logger.critical("D-Bus Exception", exc_info=error)
295
324
def remove(self):
296
325
"""Derived from the Avahi example code"""
352
380
def server_state_changed(self, state, error=None):
353
381
"""Derived from the Avahi example code"""
354
382
logger.debug("Avahi server state change: %i", state)
355
bad_states = { avahi.SERVER_INVALID:
356
"Zeroconf server invalid",
357
avahi.SERVER_REGISTERING: None,
358
avahi.SERVER_COLLISION:
359
"Zeroconf server name collision",
360
avahi.SERVER_FAILURE:
361
"Zeroconf server failure" }
384
avahi.SERVER_INVALID: "Zeroconf server invalid",
385
avahi.SERVER_REGISTERING: None,
386
avahi.SERVER_COLLISION: "Zeroconf server name collision",
387
avahi.SERVER_FAILURE: "Zeroconf server failure",
362
389
if state in bad_states:
363
390
if bad_states[state] is not None:
364
391
if error is None:
383
410
follow_name_owner_changes=True),
384
411
avahi.DBUS_INTERFACE_SERVER)
385
412
self.server.connect_to_signal("StateChanged",
386
self.server_state_changed)
413
self.server_state_changed)
387
414
self.server_state_changed(self.server.GetState())
390
417
class AvahiServiceToSyslog(AvahiService):
418
def rename(self, *args, **kwargs):
392
419
"""Add the new name to the syslog messages"""
393
ret = AvahiService.rename(self)
394
syslogger.setFormatter(logging.Formatter
395
('Mandos ({0}) [%(process)d]:'
396
' %(levelname)s: %(message)s'
420
ret = AvahiService.rename(self, *args, **kwargs)
421
syslogger.setFormatter(logging.Formatter(
422
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
401
def timedelta_to_milliseconds(td):
402
"Convert a datetime.timedelta() to milliseconds"
403
return ((td.days * 24 * 60 * 60 * 1000)
404
+ (td.seconds * 1000)
405
+ (td.microseconds // 1000))
426
def subprocess_call_pipe(connection, # : multiprocessing.Connection
428
"""This function is meant to be called by multiprocessing.Process
430
This function runs a synchronous subprocess.call(), and writes the
431
resulting return code on the provided multiprocessing.Connection.
433
connection.send(subprocess.call(*args, **kwargs))
408
436
class Client(object):
409
437
"""A representation of a client host served by this server.
454
484
"fingerprint", "host", "interval",
455
485
"last_approval_request", "last_checked_ok",
456
486
"last_enabled", "name", "timeout")
457
client_defaults = { "timeout": "PT5M",
458
"extended_timeout": "PT15M",
460
"checker": "fping -q -- %%(host)s",
462
"approval_delay": "PT0S",
463
"approval_duration": "PT1S",
464
"approved_by_default": "True",
468
def timeout_milliseconds(self):
469
"Return the 'timeout' attribute in milliseconds"
470
return timedelta_to_milliseconds(self.timeout)
472
def extended_timeout_milliseconds(self):
473
"Return the 'extended_timeout' attribute in milliseconds"
474
return timedelta_to_milliseconds(self.extended_timeout)
476
def interval_milliseconds(self):
477
"Return the 'interval' attribute in milliseconds"
478
return timedelta_to_milliseconds(self.interval)
480
def approval_delay_milliseconds(self):
481
return timedelta_to_milliseconds(self.approval_delay)
489
"extended_timeout": "PT15M",
491
"checker": "fping -q -- %%(host)s",
493
"approval_delay": "PT0S",
494
"approval_duration": "PT1S",
495
"approved_by_default": "True",
484
500
def config_parser(config):
562
578
self.current_checker_command = None
563
579
self.approved = None
564
580
self.approvals_pending = 0
565
self.changedstate = (multiprocessing_manager
566
.Condition(multiprocessing_manager
568
self.client_structure = [attr for attr in
569
self.__dict__.iterkeys()
581
self.changedstate = multiprocessing_manager.Condition(
582
multiprocessing_manager.Lock())
583
self.client_structure = [attr
584
for attr in self.__dict__.iterkeys()
570
585
if not attr.startswith("_")]
571
586
self.client_structure.append("client_structure")
573
for name, t in inspect.getmembers(type(self),
588
for name, t in inspect.getmembers(
589
type(self), lambda obj: isinstance(obj, property)):
577
590
if not name.startswith("_"):
578
591
self.client_structure.append(name)
621
634
# and every interval from then on.
622
635
if self.checker_initiator_tag is not None:
623
636
gobject.source_remove(self.checker_initiator_tag)
624
self.checker_initiator_tag = (gobject.timeout_add
625
(self.interval_milliseconds(),
637
self.checker_initiator_tag = gobject.timeout_add(
638
int(self.interval.total_seconds() * 1000),
627
640
# Schedule a disable() when 'timeout' has passed
628
641
if self.disable_initiator_tag is not None:
629
642
gobject.source_remove(self.disable_initiator_tag)
630
self.disable_initiator_tag = (gobject.timeout_add
631
(self.timeout_milliseconds(),
643
self.disable_initiator_tag = gobject.timeout_add(
644
int(self.timeout.total_seconds() * 1000), self.disable)
633
645
# Also start a new checker *right now*.
634
646
self.start_checker()
636
def checker_callback(self, pid, condition, command):
648
def checker_callback(self, source, condition,
649
(connection, command)):
637
650
"""The checker has completed, so take appropriate actions."""
638
651
self.checker_callback_tag = None
639
652
self.checker = None
640
if os.WIFEXITED(condition):
641
self.last_checker_status = os.WEXITSTATUS(condition)
653
# Read return code from connection (see subprocess_call_pipe)
654
returncode = connection.recv()
658
self.last_checker_status = returncode
659
self.last_checker_signal = None
642
660
if self.last_checker_status == 0:
643
661
logger.info("Checker for %(name)s succeeded",
645
663
self.checked_ok()
647
logger.info("Checker for %(name)s failed",
665
logger.info("Checker for %(name)s failed", vars(self))
650
667
self.last_checker_status = -1
668
self.last_checker_signal = -returncode
651
669
logger.warning("Checker for %(name)s crashed?",
654
673
def checked_ok(self):
655
674
"""Assert that the client has been seen, alive and well."""
656
675
self.last_checked_ok = datetime.datetime.utcnow()
657
676
self.last_checker_status = 0
677
self.last_checker_signal = None
658
678
self.bump_timeout()
660
680
def bump_timeout(self, timeout=None):
687
706
# than 'timeout' for the client to be disabled, which is as it
690
# If a checker exists, make sure it is not a zombie
692
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
693
except AttributeError:
695
except OSError as error:
696
if error.errno != errno.ECHILD:
700
logger.warning("Checker was a zombie")
701
gobject.source_remove(self.checker_callback_tag)
702
self.checker_callback(pid, status,
703
self.current_checker_command)
709
if self.checker is not None and not self.checker.is_alive():
710
logger.warning("Checker was not alive; joining")
704
713
# Start a new checker if needed
705
714
if self.checker is None:
706
715
# Escape attributes for the shell
707
escaped_attrs = dict(
708
(attr, re.escape(unicode(getattr(self, attr))))
710
self.runtime_expansions)
717
attr: re.escape(str(getattr(self, attr)))
718
for attr in self.runtime_expansions }
712
720
command = self.checker_command % escaped_attrs
713
721
except TypeError as error:
714
722
logger.error('Could not format string "%s"',
715
self.checker_command, exc_info=error)
716
return True # Try again later
723
self.checker_command,
725
return True # Try again later
717
726
self.current_checker_command = command
719
logger.info("Starting checker %r for %s",
721
# We don't need to redirect stdout and stderr, since
722
# in normal mode, that is already done by daemon(),
723
# and in debug mode we don't want to. (Stdin is
724
# always replaced by /dev/null.)
725
# The exception is when not debugging but nevertheless
726
# running in the foreground; use the previously
729
if (not self.server_settings["debug"]
730
and self.server_settings["foreground"]):
731
popen_args.update({"stdout": wnull,
733
self.checker = subprocess.Popen(command,
737
except OSError as error:
738
logger.error("Failed to start subprocess",
741
self.checker_callback_tag = (gobject.child_watch_add
743
self.checker_callback,
745
# The checker may have completed before the gobject
746
# watch was added. Check for this.
748
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
749
except OSError as error:
750
if error.errno == errno.ECHILD:
751
# This should never happen
752
logger.error("Child process vanished",
757
gobject.source_remove(self.checker_callback_tag)
758
self.checker_callback(pid, status, command)
727
logger.info("Starting checker %r for %s", command,
729
# We don't need to redirect stdout and stderr, since
730
# in normal mode, that is already done by daemon(),
731
# and in debug mode we don't want to. (Stdin is
732
# always replaced by /dev/null.)
733
# The exception is when not debugging but nevertheless
734
# running in the foreground; use the previously
736
popen_args = { "close_fds": True,
739
if (not self.server_settings["debug"]
740
and self.server_settings["foreground"]):
741
popen_args.update({"stdout": wnull,
743
pipe = multiprocessing.Pipe(duplex=False)
744
self.checker = multiprocessing.Process(
745
target=subprocess_call_pipe, args=(pipe[1], command),
748
self.checker_callback_tag = gobject.io_add_watch(
749
pipe[0].fileno(), gobject.IO_IN,
750
self.checker_callback, (pipe[0], command))
759
751
# Re-run this periodically if run by gobject.timeout_add
767
759
if getattr(self, "checker", None) is None:
769
761
logger.debug("Stopping checker for %(name)s", vars(self))
771
self.checker.terminate()
773
#if self.checker.poll() is None:
774
# self.checker.kill()
775
except OSError as error:
776
if error.errno != errno.ESRCH: # No such process
762
self.checker.terminate()
778
763
self.checker = None
781
def dbus_service_property(dbus_interface, signature="v",
782
access="readwrite", byte_arrays=False):
766
def dbus_service_property(dbus_interface,
783
770
"""Decorators for marking methods of a DBusObjectWithProperties to
784
771
become properties on the D-Bus.
831
822
"""Decorator to annotate D-Bus methods, signals or properties
825
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
826
"org.freedesktop.DBus.Property."
827
"EmitsChangedSignal": "false"})
834
828
@dbus_service_property("org.example.Interface", signature="b",
836
@dbus_annotations({{"org.freedesktop.DBus.Deprecated": "true",
837
"org.freedesktop.DBus.Property."
838
"EmitsChangedSignal": "false"})
839
830
def Property_dbus_property(self):
840
831
return dbus.Boolean(False)
842
834
def decorator(func):
843
835
func._dbus_annotations = annotations
848
841
class DBusPropertyException(dbus.exceptions.DBusException):
849
842
"""A base class for D-Bus property-related exceptions
851
def __unicode__(self):
852
return unicode(str(self))
855
847
class DBusPropertyAccessException(DBusPropertyException):
879
871
If called like _is_dbus_thing("method") it returns a function
880
872
suitable for use as predicate to inspect.getmembers().
882
return lambda obj: getattr(obj, "_dbus_is_{0}".format(thing),
874
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
885
877
def _get_all_dbus_things(self, thing):
886
878
"""Returns a generator of (name, attribute) pairs
888
return ((getattr(athing.__get__(self), "_dbus_name",
880
return ((getattr(athing.__get__(self), "_dbus_name", name),
890
881
athing.__get__(self))
891
882
for cls in self.__class__.__mro__
892
883
for name, athing in
893
inspect.getmembers(cls,
894
self._is_dbus_thing(thing)))
884
inspect.getmembers(cls, self._is_dbus_thing(thing)))
896
886
def _get_dbus_property(self, interface_name, property_name):
897
887
"""Returns a bound method if one exists which is a D-Bus
898
888
property with the specified name and interface.
900
for cls in self.__class__.__mro__:
901
for name, value in (inspect.getmembers
903
self._is_dbus_thing("property"))):
890
for cls in self.__class__.__mro__:
891
for name, value in inspect.getmembers(
892
cls, self._is_dbus_thing("property")):
904
893
if (value._dbus_name == property_name
905
894
and value._dbus_interface == interface_name):
906
895
return value.__get__(self)
908
897
# No such property
909
raise DBusPropertyNotFound(self.dbus_object_path + ":"
910
+ interface_name + "."
898
raise DBusPropertyNotFound("{}:{}.{}".format(
899
self.dbus_object_path, interface_name, property_name))
913
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
901
@dbus.service.method(dbus.PROPERTIES_IFACE,
914
903
out_signature="v")
915
904
def Get(self, interface_name, property_name):
916
905
"""Standard D-Bus property Get() method, see D-Bus standard.
962
952
if not hasattr(value, "variant_level"):
963
953
properties[name] = value
965
properties[name] = type(value)(value, variant_level=
966
value.variant_level+1)
955
properties[name] = type(value)(
956
value, variant_level = value.variant_level + 1)
967
957
return dbus.Dictionary(properties, signature="sv")
959
@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
960
def PropertiesChanged(self, interface_name, changed_properties,
961
invalidated_properties):
962
"""Standard D-Bus PropertiesChanged() signal, see D-Bus
969
967
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
970
968
out_signature="s",
971
969
path_keyword='object_path',
1089
1087
# Ignore non-D-Bus attributes, and D-Bus attributes
1090
1088
# with the wrong interface name
1091
1089
if (not hasattr(attribute, "_dbus_interface")
1092
or not attribute._dbus_interface
1093
.startswith(orig_interface_name)):
1090
or not attribute._dbus_interface.startswith(
1091
orig_interface_name)):
1095
1093
# Create an alternate D-Bus interface name based on
1096
1094
# the current name
1097
alt_interface = (attribute._dbus_interface
1098
.replace(orig_interface_name,
1099
alt_interface_name))
1095
alt_interface = attribute._dbus_interface.replace(
1096
orig_interface_name, alt_interface_name)
1100
1097
interface_names.add(alt_interface)
1101
1098
# Is this a D-Bus signal?
1102
1099
if getattr(attribute, "_dbus_is_signal", False):
1103
1100
# Extract the original non-method undecorated
1104
1101
# function by black magic
1105
1102
nonmethod_func = (dict(
1106
zip(attribute.func_code.co_freevars,
1107
attribute.__closure__))["func"]
1103
zip(attribute.func_code.co_freevars,
1104
attribute.__closure__))
1105
["func"].cell_contents)
1109
1106
# Create a new, but exactly alike, function
1110
1107
# object, and decorate it to be a new D-Bus signal
1111
1108
# with the alternate D-Bus interface name
1112
new_function = (dbus.service.signal
1114
attribute._dbus_signature)
1109
new_function = (dbus.service.signal(
1110
alt_interface, attribute._dbus_signature)
1115
1111
(types.FunctionType(
1116
nonmethod_func.func_code,
1117
nonmethod_func.func_globals,
1118
nonmethod_func.func_name,
1119
nonmethod_func.func_defaults,
1120
nonmethod_func.func_closure)))
1112
nonmethod_func.func_code,
1113
nonmethod_func.func_globals,
1114
nonmethod_func.func_name,
1115
nonmethod_func.func_defaults,
1116
nonmethod_func.func_closure)))
1121
1117
# Copy annotations, if any
1123
new_function._dbus_annotations = (
1124
dict(attribute._dbus_annotations))
1119
new_function._dbus_annotations = dict(
1120
attribute._dbus_annotations)
1125
1121
except AttributeError:
1127
1123
# Define a creator of a function to call both the
1147
1145
# object. Decorate it to be a new D-Bus method
1148
1146
# with the alternate D-Bus interface name. Add it
1149
1147
# to the class.
1150
attr[attrname] = (dbus.service.method
1152
attribute._dbus_in_signature,
1153
attribute._dbus_out_signature)
1155
(attribute.func_code,
1156
attribute.func_globals,
1157
attribute.func_name,
1158
attribute.func_defaults,
1159
attribute.func_closure)))
1149
dbus.service.method(
1151
attribute._dbus_in_signature,
1152
attribute._dbus_out_signature)
1153
(types.FunctionType(attribute.func_code,
1154
attribute.func_globals,
1155
attribute.func_name,
1156
attribute.func_defaults,
1157
attribute.func_closure)))
1160
1158
# Copy annotations, if any
1162
attr[attrname]._dbus_annotations = (
1163
dict(attribute._dbus_annotations))
1160
attr[attrname]._dbus_annotations = dict(
1161
attribute._dbus_annotations)
1164
1162
except AttributeError:
1166
1164
# Is this a D-Bus property?
1169
1167
# object, and decorate it to be a new D-Bus
1170
1168
# property with the alternate D-Bus interface
1171
1169
# name. Add it to the class.
1172
attr[attrname] = (dbus_service_property
1174
attribute._dbus_signature,
1175
attribute._dbus_access,
1177
._dbus_get_args_options
1180
(attribute.func_code,
1181
attribute.func_globals,
1182
attribute.func_name,
1183
attribute.func_defaults,
1184
attribute.func_closure)))
1170
attr[attrname] = (dbus_service_property(
1171
alt_interface, attribute._dbus_signature,
1172
attribute._dbus_access,
1173
attribute._dbus_get_args_options
1175
(types.FunctionType(
1176
attribute.func_code,
1177
attribute.func_globals,
1178
attribute.func_name,
1179
attribute.func_defaults,
1180
attribute.func_closure)))
1185
1181
# Copy annotations, if any
1187
attr[attrname]._dbus_annotations = (
1188
dict(attribute._dbus_annotations))
1183
attr[attrname]._dbus_annotations = dict(
1184
attribute._dbus_annotations)
1189
1185
except AttributeError:
1191
1187
# Is this a D-Bus interface?
1194
1190
# object. Decorate it to be a new D-Bus interface
1195
1191
# with the alternate D-Bus interface name. Add it
1196
1192
# to the class.
1197
attr[attrname] = (dbus_interface_annotations
1200
(attribute.func_code,
1201
attribute.func_globals,
1202
attribute.func_name,
1203
attribute.func_defaults,
1204
attribute.func_closure)))
1194
dbus_interface_annotations(alt_interface)
1195
(types.FunctionType(attribute.func_code,
1196
attribute.func_globals,
1197
attribute.func_name,
1198
attribute.func_defaults,
1199
attribute.func_closure)))
1206
1201
# Deprecate all alternate interfaces
1207
iname="_AlternateDBusNames_interface_annotation{0}"
1202
iname="_AlternateDBusNames_interface_annotation{}"
1208
1203
for interface_name in interface_names:
1209
1205
@dbus_interface_annotations(interface_name)
1210
1206
def func(self):
1211
1207
return { "org.freedesktop.DBus.Deprecated":
1213
1209
# Find an unused name
1214
1210
for aname in (iname.format(i)
1215
1211
for i in itertools.count()):
1245
1244
Client.__init__(self, *args, **kwargs)
1246
1245
# Only now, when this client is initialized, can it show up on
1248
client_object_name = unicode(self.name).translate(
1247
client_object_name = str(self.name).translate(
1249
1248
{ord("."): ord("_"),
1250
1249
ord("-"): ord("_")})
1251
self.dbus_object_path = (dbus.ObjectPath
1252
("/clients/" + client_object_name))
1250
self.dbus_object_path = dbus.ObjectPath(
1251
"/clients/" + client_object_name)
1253
1252
DBusObjectWithProperties.__init__(self, self.bus,
1254
1253
self.dbus_object_path)
1256
def notifychangeproperty(transform_func,
1257
dbus_name, type_func=lambda x: x,
1255
def notifychangeproperty(transform_func, dbus_name,
1256
type_func=lambda x: x,
1258
invalidate_only=False,
1259
_interface=_interface):
1259
1260
""" Modify a variable so that it's a property which announces
1260
1261
its changes to DBus.
1266
1267
to the D-Bus. Default: no transform
1267
1268
variant_level: D-Bus variant level. Default: 1
1269
attrname = "_{0}".format(dbus_name)
1270
attrname = "_{}".format(dbus_name)
1270
1272
def setter(self, value):
1271
1273
if hasattr(self, "dbus_object_path"):
1272
1274
if (not hasattr(self, attrname) or
1273
1275
type_func(getattr(self, attrname, None))
1274
1276
!= type_func(value)):
1275
dbus_value = transform_func(type_func(value),
1278
self.PropertyChanged(dbus.String(dbus_name),
1278
self.PropertiesChanged(
1279
_interface, dbus.Dictionary(),
1280
dbus.Array((dbus_name, )))
1282
dbus_value = transform_func(
1284
variant_level = variant_level)
1285
self.PropertyChanged(dbus.String(dbus_name),
1287
self.PropertiesChanged(
1289
dbus.Dictionary({ dbus.String(dbus_name):
1280
1292
setattr(self, attrname, value)
1282
1294
return property(lambda self: getattr(self, attrname), setter)
1288
1300
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1289
1301
last_enabled = notifychangeproperty(datetime_to_dbus,
1291
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1292
type_func = lambda checker:
1293
checker is not None)
1303
checker = notifychangeproperty(
1304
dbus.Boolean, "CheckerRunning",
1305
type_func = lambda checker: checker is not None)
1294
1306
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1295
1307
"LastCheckedOK")
1296
1308
last_checker_status = notifychangeproperty(dbus.Int16,
1299
1311
datetime_to_dbus, "LastApprovalRequest")
1300
1312
approved_by_default = notifychangeproperty(dbus.Boolean,
1301
1313
"ApprovedByDefault")
1302
approval_delay = notifychangeproperty(dbus.UInt64,
1305
timedelta_to_milliseconds)
1314
approval_delay = notifychangeproperty(
1315
dbus.UInt64, "ApprovalDelay",
1316
type_func = lambda td: td.total_seconds() * 1000)
1306
1317
approval_duration = notifychangeproperty(
1307
1318
dbus.UInt64, "ApprovalDuration",
1308
type_func = timedelta_to_milliseconds)
1319
type_func = lambda td: td.total_seconds() * 1000)
1309
1320
host = notifychangeproperty(dbus.String, "Host")
1310
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1312
timedelta_to_milliseconds)
1321
timeout = notifychangeproperty(
1322
dbus.UInt64, "Timeout",
1323
type_func = lambda td: td.total_seconds() * 1000)
1313
1324
extended_timeout = notifychangeproperty(
1314
1325
dbus.UInt64, "ExtendedTimeout",
1315
type_func = timedelta_to_milliseconds)
1316
interval = notifychangeproperty(dbus.UInt64,
1319
timedelta_to_milliseconds)
1326
type_func = lambda td: td.total_seconds() * 1000)
1327
interval = notifychangeproperty(
1328
dbus.UInt64, "Interval",
1329
type_func = lambda td: td.total_seconds() * 1000)
1320
1330
checker_command = notifychangeproperty(dbus.String, "Checker")
1331
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1332
invalidate_only=True)
1322
1334
del notifychangeproperty
1330
1342
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1331
1343
Client.__del__(self, *args, **kwargs)
1333
def checker_callback(self, pid, condition, command,
1335
self.checker_callback_tag = None
1337
if os.WIFEXITED(condition):
1338
exitstatus = os.WEXITSTATUS(condition)
1345
def checker_callback(self, source, condition,
1346
(connection, command), *args, **kwargs):
1347
ret = Client.checker_callback(self, source, condition,
1348
(connection, command), *args,
1350
exitstatus = self.last_checker_status
1339
1352
# Emit D-Bus signal
1340
1353
self.CheckerCompleted(dbus.Int16(exitstatus),
1341
dbus.Int64(condition),
1342
1355
dbus.String(command))
1344
1357
# Emit D-Bus signal
1345
1358
self.CheckerCompleted(dbus.Int16(-1),
1346
dbus.Int64(condition),
1360
self.last_checker_signal),
1347
1361
dbus.String(command))
1349
return Client.checker_callback(self, pid, condition, command,
1352
1364
def start_checker(self, *args, **kwargs):
1353
old_checker = self.checker
1354
if self.checker is not None:
1355
old_checker_pid = self.checker.pid
1357
old_checker_pid = None
1365
old_checker_pid = getattr(self.checker, "pid", None)
1358
1366
r = Client.start_checker(self, *args, **kwargs)
1359
1367
# Only if new checker process was started
1360
1368
if (self.checker is not None
1476
1479
self.approved_by_default = bool(value)
1478
1481
# ApprovalDelay - property
1479
@dbus_service_property(_interface, signature="t",
1482
@dbus_service_property(_interface,
1480
1484
access="readwrite")
1481
1485
def ApprovalDelay_dbus_property(self, value=None):
1482
1486
if value is None: # get
1483
return dbus.UInt64(self.approval_delay_milliseconds())
1487
return dbus.UInt64(self.approval_delay.total_seconds()
1484
1489
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1486
1491
# ApprovalDuration - property
1487
@dbus_service_property(_interface, signature="t",
1492
@dbus_service_property(_interface,
1488
1494
access="readwrite")
1489
1495
def ApprovalDuration_dbus_property(self, value=None):
1490
1496
if value is None: # get
1491
return dbus.UInt64(timedelta_to_milliseconds(
1492
self.approval_duration))
1497
return dbus.UInt64(self.approval_duration.total_seconds()
1493
1499
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1495
1501
# Name - property
1578
1587
gobject.source_remove(self.disable_initiator_tag)
1579
self.disable_initiator_tag = (
1580
gobject.timeout_add(
1581
timedelta_to_milliseconds(self.expires - now),
1588
self.disable_initiator_tag = gobject.timeout_add(
1589
int((self.expires - now).total_seconds() * 1000),
1584
1592
# ExtendedTimeout - property
1585
@dbus_service_property(_interface, signature="t",
1593
@dbus_service_property(_interface,
1586
1595
access="readwrite")
1587
1596
def ExtendedTimeout_dbus_property(self, value=None):
1588
1597
if value is None: # get
1589
return dbus.UInt64(self.extended_timeout_milliseconds())
1598
return dbus.UInt64(self.extended_timeout.total_seconds()
1590
1600
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1592
1602
# Interval - property
1593
@dbus_service_property(_interface, signature="t",
1603
@dbus_service_property(_interface,
1594
1605
access="readwrite")
1595
1606
def Interval_dbus_property(self, value=None):
1596
1607
if value is None: # get
1597
return dbus.UInt64(self.interval_milliseconds())
1608
return dbus.UInt64(self.interval.total_seconds() * 1000)
1598
1609
self.interval = datetime.timedelta(0, 0, 0, value)
1599
1610
if getattr(self, "checker_initiator_tag", None) is None:
1601
1612
if self.enabled:
1602
1613
# Reschedule checker run
1603
1614
gobject.source_remove(self.checker_initiator_tag)
1604
self.checker_initiator_tag = (gobject.timeout_add
1605
(value, self.start_checker))
1606
self.start_checker() # Start one now, too
1615
self.checker_initiator_tag = gobject.timeout_add(
1616
value, self.start_checker)
1617
self.start_checker() # Start one now, too
1608
1619
# Checker - property
1609
@dbus_service_property(_interface, signature="s",
1620
@dbus_service_property(_interface,
1610
1622
access="readwrite")
1611
1623
def Checker_dbus_property(self, value=None):
1612
1624
if value is None: # get
1613
1625
return dbus.String(self.checker_command)
1614
self.checker_command = unicode(value)
1626
self.checker_command = str(value)
1616
1628
# CheckerRunning - property
1617
@dbus_service_property(_interface, signature="b",
1629
@dbus_service_property(_interface,
1618
1631
access="readwrite")
1619
1632
def CheckerRunning_dbus_property(self, value=None):
1620
1633
if value is None: # get
1673
1690
def handle(self):
1674
1691
with contextlib.closing(self.server.child_pipe) as child_pipe:
1675
1692
logger.info("TCP connection from: %s",
1676
unicode(self.client_address))
1693
str(self.client_address))
1677
1694
logger.debug("Pipe FD: %d",
1678
1695
self.server.child_pipe.fileno())
1680
session = (gnutls.connection
1681
.ClientSession(self.request,
1683
.X509Credentials()))
1697
session = gnutls.connection.ClientSession(
1698
self.request, gnutls.connection .X509Credentials())
1685
1700
# Note: gnutls.connection.X509Credentials is really a
1686
1701
# generic GnuTLS certificate credentials object so long as
1846
1858
def fingerprint(openpgp):
1847
1859
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1848
1860
# New GnuTLS "datum" with the OpenPGP public key
1849
datum = (gnutls.library.types
1850
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1853
ctypes.c_uint(len(openpgp))))
1861
datum = gnutls.library.types.gnutls_datum_t(
1862
ctypes.cast(ctypes.c_char_p(openpgp),
1863
ctypes.POINTER(ctypes.c_ubyte)),
1864
ctypes.c_uint(len(openpgp)))
1854
1865
# New empty GnuTLS certificate
1855
1866
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1856
(gnutls.library.functions
1857
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1867
gnutls.library.functions.gnutls_openpgp_crt_init(
1858
1869
# Import the OpenPGP public key into the certificate
1859
(gnutls.library.functions
1860
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1861
gnutls.library.constants
1862
.GNUTLS_OPENPGP_FMT_RAW))
1870
gnutls.library.functions.gnutls_openpgp_crt_import(
1871
crt, ctypes.byref(datum),
1872
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
1863
1873
# Verify the self signature in the key
1864
1874
crtverify = ctypes.c_uint()
1865
(gnutls.library.functions
1866
.gnutls_openpgp_crt_verify_self(crt, 0,
1867
ctypes.byref(crtverify)))
1875
gnutls.library.functions.gnutls_openpgp_crt_verify_self(
1876
crt, 0, ctypes.byref(crtverify))
1868
1877
if crtverify.value != 0:
1869
1878
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1870
raise (gnutls.errors.CertificateSecurityError
1879
raise gnutls.errors.CertificateSecurityError(
1872
1881
# New buffer for the fingerprint
1873
1882
buf = ctypes.create_string_buffer(20)
1874
1883
buf_len = ctypes.c_size_t()
1875
1884
# Get the fingerprint from the certificate into the buffer
1876
(gnutls.library.functions
1877
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1878
ctypes.byref(buf_len)))
1885
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint(
1886
crt, ctypes.byref(buf), ctypes.byref(buf_len))
1879
1887
# Deinit the certificate
1880
1888
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1881
1889
# Convert the buffer to a Python bytestring
2049
2067
def add_pipe(self, parent_pipe, proc):
2050
2068
# Call "handle_ipc" for both data and EOF events
2051
gobject.io_add_watch(parent_pipe.fileno(),
2052
gobject.IO_IN | gobject.IO_HUP,
2053
functools.partial(self.handle_ipc,
2069
gobject.io_add_watch(
2070
parent_pipe.fileno(),
2071
gobject.IO_IN | gobject.IO_HUP,
2072
functools.partial(self.handle_ipc,
2073
parent_pipe = parent_pipe,
2058
def handle_ipc(self, source, condition, parent_pipe=None,
2059
proc = None, client_object=None):
2076
def handle_ipc(self, source, condition,
2079
client_object=None):
2060
2080
# error, or the other end of multiprocessing.Pipe has closed
2061
2081
if condition & (gobject.IO_ERR | gobject.IO_HUP):
2062
2082
# Wait for other process to exit
2159
2178
"followers")) # Tokens valid after
2180
Token = collections.namedtuple("Token", (
2181
"regexp", # To match token; if "value" is not None, must have
2182
# a "group" containing digits
2183
"value", # datetime.timedelta or None
2184
"followers")) # Tokens valid after this token
2161
2185
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2162
2186
# the "duration" ABNF definition in RFC 3339, Appendix A.
2163
2187
token_end = Token(re.compile(r"$"), None, frozenset())
2164
2188
token_second = Token(re.compile(r"(\d+)S"),
2165
2189
datetime.timedelta(seconds=1),
2166
frozenset((token_end,)))
2190
frozenset((token_end, )))
2167
2191
token_minute = Token(re.compile(r"(\d+)M"),
2168
2192
datetime.timedelta(minutes=1),
2169
2193
frozenset((token_second, token_end)))
2185
2209
frozenset((token_month, token_end)))
2186
2210
token_week = Token(re.compile(r"(\d+)W"),
2187
2211
datetime.timedelta(weeks=1),
2188
frozenset((token_end,)))
2212
frozenset((token_end, )))
2189
2213
token_duration = Token(re.compile(r"P"), None,
2190
2214
frozenset((token_year, token_month,
2191
2215
token_day, token_time,
2193
2217
# Define starting values
2194
2218
value = datetime.timedelta() # Value so far
2195
2219
found_token = None
2196
followers = frozenset(token_duration,) # Following valid tokens
2220
followers = frozenset((token_duration,)) # Following valid tokens
2197
2221
s = duration # String left to parse
2198
2222
# Loop until end token is found
2199
2223
while found_token is not token_end:
2391
2418
# Override the settings from the config file with command line
2392
2419
# options, if set.
2393
2420
for option in ("interface", "address", "port", "debug",
2394
"priority", "servicename", "configdir",
2395
"use_dbus", "use_ipv6", "debuglevel", "restore",
2396
"statedir", "socket", "foreground"):
2421
"priority", "servicename", "configdir", "use_dbus",
2422
"use_ipv6", "debuglevel", "restore", "statedir",
2423
"socket", "foreground", "zeroconf"):
2397
2424
value = getattr(options, option)
2398
2425
if value is not None:
2399
2426
server_settings[option] = value
2401
2428
# Force all strings to be unicode
2402
2429
for option in server_settings.keys():
2403
if type(server_settings[option]) is str:
2404
server_settings[option] = unicode(server_settings[option])
2430
if isinstance(server_settings[option], bytes):
2431
server_settings[option] = (server_settings[option]
2405
2433
# Force all boolean options to be boolean
2406
2434
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2435
"foreground", "zeroconf"):
2408
2436
server_settings[option] = bool(server_settings[option])
2409
2437
# Debug implies foreground
2410
2438
if server_settings["debug"]:
2447
2480
global mandos_dbus_service
2448
2481
mandos_dbus_service = None
2450
tcp_server = MandosServer((server_settings["address"],
2451
server_settings["port"]),
2453
interface=(server_settings["interface"]
2457
server_settings["priority"],
2459
socketfd=(server_settings["socket"]
2484
if server_settings["socket"] != "":
2485
socketfd = server_settings["socket"]
2486
tcp_server = MandosServer(
2487
(server_settings["address"], server_settings["port"]),
2489
interface=(server_settings["interface"] or None),
2491
gnutls_priority=server_settings["priority"],
2461
2494
if not foreground:
2462
2495
pidfilename = "/run/mandos.pid"
2463
2496
if not os.path.isdir("/run/."):
2526
2559
bus_name = dbus.service.BusName("se.recompile.Mandos",
2527
bus, do_not_queue=True)
2528
old_bus_name = (dbus.service.BusName
2529
("se.bsnet.fukt.Mandos", bus,
2562
old_bus_name = dbus.service.BusName(
2563
"se.bsnet.fukt.Mandos", bus,
2531
2565
except dbus.exceptions.NameExistsException as e:
2532
2566
logger.error("Disabling D-Bus:", exc_info=e)
2533
2567
use_dbus = False
2534
2568
server_settings["use_dbus"] = False
2535
2569
tcp_server.use_dbus = False
2536
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2537
service = AvahiServiceToSyslog(name =
2538
server_settings["servicename"],
2539
servicetype = "_mandos._tcp",
2540
protocol = protocol, bus = bus)
2541
if server_settings["interface"]:
2542
service.interface = (if_nametoindex
2543
(str(server_settings["interface"])))
2571
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2572
service = AvahiServiceToSyslog(
2573
name = server_settings["servicename"],
2574
servicetype = "_mandos._tcp",
2575
protocol = protocol,
2577
if server_settings["interface"]:
2578
service.interface = if_nametoindex(
2579
server_settings["interface"].encode("utf-8"))
2545
2581
global multiprocessing_manager
2546
2582
multiprocessing_manager = multiprocessing.Manager()
2565
2601
if server_settings["restore"]:
2567
2603
with open(stored_state_path, "rb") as stored_state:
2568
clients_data, old_client_settings = (pickle.load
2604
clients_data, old_client_settings = pickle.load(
2570
2606
os.remove(stored_state_path)
2571
2607
except IOError as e:
2572
2608
if e.errno == errno.ENOENT:
2573
logger.warning("Could not load persistent state: {0}"
2574
.format(os.strerror(e.errno)))
2609
logger.warning("Could not load persistent state:"
2610
" {}".format(os.strerror(e.errno)))
2576
2612
logger.critical("Could not load persistent state:",
2579
2615
except EOFError as e:
2580
2616
logger.warning("Could not load persistent state: "
2581
"EOFError:", exc_info=e)
2583
2620
with PGPEngine() as pgp:
2584
for client_name, client in clients_data.iteritems():
2621
for client_name, client in clients_data.items():
2585
2622
# Skip removed clients
2586
2623
if client_name not in client_settings:
2612
2649
if datetime.datetime.utcnow() >= client["expires"]:
2613
2650
if not client["last_checked_ok"]:
2614
2651
logger.warning(
2615
"disabling client {0} - Client never "
2616
"performed a successful checker"
2617
.format(client_name))
2652
"disabling client {} - Client never "
2653
"performed a successful checker".format(
2618
2655
client["enabled"] = False
2619
2656
elif client["last_checker_status"] != 0:
2620
2657
logger.warning(
2621
"disabling client {0} - Client "
2622
"last checker failed with error code {1}"
2623
.format(client_name,
2624
client["last_checker_status"]))
2658
"disabling client {} - Client last"
2659
" checker failed with error code"
2662
client["last_checker_status"]))
2625
2663
client["enabled"] = False
2627
client["expires"] = (datetime.datetime
2629
+ client["timeout"])
2665
client["expires"] = (
2666
datetime.datetime.utcnow()
2667
+ client["timeout"])
2630
2668
logger.debug("Last checker succeeded,"
2631
" keeping {0} enabled"
2632
.format(client_name))
2669
" keeping {} enabled".format(
2634
client["secret"] = (
2635
pgp.decrypt(client["encrypted_secret"],
2636
client_settings[client_name]
2672
client["secret"] = pgp.decrypt(
2673
client["encrypted_secret"],
2674
client_settings[client_name]["secret"])
2638
2675
except PGPError:
2639
2676
# If decryption fails, we use secret from new settings
2640
logger.debug("Failed to decrypt {0} old secret"
2641
.format(client_name))
2642
client["secret"] = (
2643
client_settings[client_name]["secret"])
2677
logger.debug("Failed to decrypt {} old secret".format(
2679
client["secret"] = (client_settings[client_name]
2645
2682
# Add/remove clients based on new changes made to config
2646
2683
for client_name in (set(old_client_settings)
2675
2713
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2678
@alternate_dbus_interfaces({"se.recompile.Mandos":
2679
"se.bsnet.fukt.Mandos"})
2717
@alternate_dbus_interfaces(
2718
{ "se.recompile.Mandos": "se.bsnet.fukt.Mandos" })
2680
2719
class MandosDBusService(DBusObjectWithProperties):
2681
2720
"""A D-Bus proxy object"""
2682
2722
def __init__(self):
2683
2723
dbus.service.Object.__init__(self, bus, "/")
2684
2725
_interface = "se.recompile.Mandos"
2686
2727
@dbus_interface_annotations(_interface)
2687
2728
def _foo(self):
2688
return { "org.freedesktop.DBus.Property"
2689
".EmitsChangedSignal":
2730
"org.freedesktop.DBus.Property.EmitsChangedSignal":
2692
2733
@dbus.service.signal(_interface, signature="o")
2693
2734
def ClientAdded(self, objpath):
2761
2802
# A list of attributes that can not be pickled
2763
exclude = set(("bus", "changedstate", "secret",
2764
"checker", "server_settings"))
2765
for name, typ in (inspect.getmembers
2766
(dbus.service.Object)):
2804
exclude = { "bus", "changedstate", "secret",
2805
"checker", "server_settings" }
2806
for name, typ in inspect.getmembers(dbus.service
2767
2808
exclude.add(name)
2769
2810
client_dict["encrypted_secret"] = (client
2776
2817
del client_settings[client.name]["secret"]
2779
with (tempfile.NamedTemporaryFile
2780
(mode='wb', suffix=".pickle", prefix='clients-',
2781
dir=os.path.dirname(stored_state_path),
2782
delete=False)) as stored_state:
2820
with tempfile.NamedTemporaryFile(
2824
dir=os.path.dirname(stored_state_path),
2825
delete=False) as stored_state:
2783
2826
pickle.dump((clients, client_settings), stored_state)
2784
tempname=stored_state.name
2827
tempname = stored_state.name
2785
2828
os.rename(tempname, stored_state_path)
2786
2829
except (IOError, OSError) as e: