88
101
except ImportError:
89
102
SO_BINDTODEVICE = None
104
if sys.version_info.major == 2:
92
108
stored_state_file = "clients.pickle"
94
110
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"))
114
if_nametoindex = ctypes.cdll.LoadLibrary(
115
ctypes.util.find_library("c")).if_nametoindex
103
116
except (OSError, AttributeError):
104
118
def if_nametoindex(interface):
105
119
"Get an interface index the hard way, i.e. using fcntl()"
106
120
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
107
121
with contextlib.closing(socket.socket()) as s:
108
122
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
109
struct.pack(str("16s16x"),
111
interface_index = struct.unpack(str("I"),
123
struct.pack(b"16s16x", interface))
124
interface_index = struct.unpack("I", ifreq[16:20])[0]
113
125
return interface_index
116
128
def initlogger(debug, level=logging.WARNING):
117
129
"""init logger and add loglevel"""
132
syslogger = (logging.handlers.SysLogHandler(
133
facility = logging.handlers.SysLogHandler.LOG_DAEMON,
134
address = "/dev/log"))
119
135
syslogger.setFormatter(logging.Formatter
120
136
('Mandos [%(process)d]: %(levelname)s:'
273
297
self.entry_group_state_changed_match = None
299
def rename(self, remove=True):
276
300
"""Derived from the Avahi example code"""
277
301
if self.rename_count >= self.max_renames:
278
302
logger.critical("No suitable Zeroconf service name found"
279
303
" after %i retries, exiting.",
280
304
self.rename_count)
281
305
raise AvahiServiceError("Too many renames")
282
self.name = unicode(self.server
283
.GetAlternativeServiceName(self.name))
307
self.server.GetAlternativeServiceName(self.name))
308
self.rename_count += 1
284
309
logger.info("Changing Zeroconf service name to %r ...",
289
315
except dbus.exceptions.DBusException as error:
290
logger.critical("D-Bus Exception", exc_info=error)
293
self.rename_count += 1
316
if (error.get_dbus_name()
317
== "org.freedesktop.Avahi.CollisionError"):
318
logger.info("Local Zeroconf service name collision.")
319
return self.rename(remove=False)
321
logger.critical("D-Bus Exception", exc_info=error)
295
325
def remove(self):
296
326
"""Derived from the Avahi example code"""
352
381
def server_state_changed(self, state, error=None):
353
382
"""Derived from the Avahi example code"""
354
383
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" }
385
avahi.SERVER_INVALID: "Zeroconf server invalid",
386
avahi.SERVER_REGISTERING: None,
387
avahi.SERVER_COLLISION: "Zeroconf server name collision",
388
avahi.SERVER_FAILURE: "Zeroconf server failure",
362
390
if state in bad_states:
363
391
if bad_states[state] is not None:
364
392
if error is None:
383
422
follow_name_owner_changes=True),
384
423
avahi.DBUS_INTERFACE_SERVER)
385
424
self.server.connect_to_signal("StateChanged",
386
self.server_state_changed)
425
self.server_state_changed)
387
426
self.server_state_changed(self.server.GetState())
390
429
class AvahiServiceToSyslog(AvahiService):
430
def rename(self, *args, **kwargs):
392
431
"""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'
432
ret = AvahiService.rename(self, *args, **kwargs)
433
syslogger.setFormatter(logging.Formatter(
434
'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))
438
def call_pipe(connection, # : multiprocessing.Connection
439
func, *args, **kwargs):
440
"""This function is meant to be called by multiprocessing.Process
442
This function runs func(*args, **kwargs), and writes the resulting
443
return value on the provided multiprocessing.Connection.
445
connection.send(func(*args, **kwargs))
408
448
class Client(object):
409
449
"""A representation of a client host served by this server.
454
496
"fingerprint", "host", "interval",
455
497
"last_approval_request", "last_checked_ok",
456
498
"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)
501
"extended_timeout": "PT15M",
503
"checker": "fping -q -- %%(host)s",
505
"approval_delay": "PT0S",
506
"approval_duration": "PT1S",
507
"approved_by_default": "True",
484
512
def config_parser(config):
562
590
self.current_checker_command = None
563
591
self.approved = None
564
592
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()
593
self.changedstate = multiprocessing_manager.Condition(
594
multiprocessing_manager.Lock())
595
self.client_structure = [attr
596
for attr in self.__dict__.iterkeys()
570
597
if not attr.startswith("_")]
571
598
self.client_structure.append("client_structure")
573
for name, t in inspect.getmembers(type(self),
600
for name, t in inspect.getmembers(
601
type(self), lambda obj: isinstance(obj, property)):
577
602
if not name.startswith("_"):
578
603
self.client_structure.append(name)
621
646
# and every interval from then on.
622
647
if self.checker_initiator_tag is not None:
623
648
gobject.source_remove(self.checker_initiator_tag)
624
self.checker_initiator_tag = (gobject.timeout_add
625
(self.interval_milliseconds(),
649
self.checker_initiator_tag = gobject.timeout_add(
650
int(self.interval.total_seconds() * 1000),
627
652
# Schedule a disable() when 'timeout' has passed
628
653
if self.disable_initiator_tag is not None:
629
654
gobject.source_remove(self.disable_initiator_tag)
630
self.disable_initiator_tag = (gobject.timeout_add
631
(self.timeout_milliseconds(),
655
self.disable_initiator_tag = gobject.timeout_add(
656
int(self.timeout.total_seconds() * 1000), self.disable)
633
657
# Also start a new checker *right now*.
634
658
self.start_checker()
636
def checker_callback(self, pid, condition, command):
660
def checker_callback(self, source, condition, connection,
637
662
"""The checker has completed, so take appropriate actions."""
638
663
self.checker_callback_tag = None
639
664
self.checker = None
640
if os.WIFEXITED(condition):
641
self.last_checker_status = os.WEXITSTATUS(condition)
665
# Read return code from connection (see call_pipe)
666
returncode = connection.recv()
670
self.last_checker_status = returncode
671
self.last_checker_signal = None
642
672
if self.last_checker_status == 0:
643
673
logger.info("Checker for %(name)s succeeded",
645
675
self.checked_ok()
647
logger.info("Checker for %(name)s failed",
677
logger.info("Checker for %(name)s failed", vars(self))
650
679
self.last_checker_status = -1
680
self.last_checker_signal = -returncode
651
681
logger.warning("Checker for %(name)s crashed?",
654
685
def checked_ok(self):
655
686
"""Assert that the client has been seen, alive and well."""
656
687
self.last_checked_ok = datetime.datetime.utcnow()
657
688
self.last_checker_status = 0
689
self.last_checker_signal = None
658
690
self.bump_timeout()
660
692
def bump_timeout(self, timeout=None):
687
718
# 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)
721
if self.checker is not None and not self.checker.is_alive():
722
logger.warning("Checker was not alive; joining")
704
725
# Start a new checker if needed
705
726
if self.checker is None:
706
727
# Escape attributes for the shell
707
escaped_attrs = dict(
708
(attr, re.escape(unicode(getattr(self, attr))))
710
self.runtime_expansions)
729
attr: re.escape(str(getattr(self, attr)))
730
for attr in self.runtime_expansions }
712
732
command = self.checker_command % escaped_attrs
713
733
except TypeError as error:
714
734
logger.error('Could not format string "%s"',
715
self.checker_command, exc_info=error)
716
return True # Try again later
735
self.checker_command,
737
return True # Try again later
717
738
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)
739
logger.info("Starting checker %r for %s", command,
741
# We don't need to redirect stdout and stderr, since
742
# in normal mode, that is already done by daemon(),
743
# and in debug mode we don't want to. (Stdin is
744
# always replaced by /dev/null.)
745
# The exception is when not debugging but nevertheless
746
# running in the foreground; use the previously
748
popen_args = { "close_fds": True,
751
if (not self.server_settings["debug"]
752
and self.server_settings["foreground"]):
753
popen_args.update({"stdout": wnull,
755
pipe = multiprocessing.Pipe(duplex = False)
756
self.checker = multiprocessing.Process(
758
args = (pipe[1], subprocess.call, command),
761
self.checker_callback_tag = gobject.io_add_watch(
762
pipe[0].fileno(), gobject.IO_IN,
763
self.checker_callback, pipe[0], command)
759
764
# Re-run this periodically if run by gobject.timeout_add
767
772
if getattr(self, "checker", None) is None:
769
774
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
775
self.checker.terminate()
778
776
self.checker = None
781
def dbus_service_property(dbus_interface, signature="v",
782
access="readwrite", byte_arrays=False):
779
def dbus_service_property(dbus_interface,
783
783
"""Decorators for marking methods of a DBusObjectWithProperties to
784
784
become properties on the D-Bus.
831
835
"""Decorator to annotate D-Bus methods, signals or properties
838
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
839
"org.freedesktop.DBus.Property."
840
"EmitsChangedSignal": "false"})
834
841
@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
843
def Property_dbus_property(self):
840
844
return dbus.Boolean(False)
842
847
def decorator(func):
843
848
func._dbus_annotations = annotations
848
854
class DBusPropertyException(dbus.exceptions.DBusException):
849
855
"""A base class for D-Bus property-related exceptions
851
def __unicode__(self):
852
return unicode(str(self))
855
860
class DBusPropertyAccessException(DBusPropertyException):
879
884
If called like _is_dbus_thing("method") it returns a function
880
885
suitable for use as predicate to inspect.getmembers().
882
return lambda obj: getattr(obj, "_dbus_is_{0}".format(thing),
887
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
885
890
def _get_all_dbus_things(self, thing):
886
891
"""Returns a generator of (name, attribute) pairs
888
return ((getattr(athing.__get__(self), "_dbus_name",
893
return ((getattr(athing.__get__(self), "_dbus_name", name),
890
894
athing.__get__(self))
891
895
for cls in self.__class__.__mro__
892
896
for name, athing in
893
inspect.getmembers(cls,
894
self._is_dbus_thing(thing)))
897
inspect.getmembers(cls, self._is_dbus_thing(thing)))
896
899
def _get_dbus_property(self, interface_name, property_name):
897
900
"""Returns a bound method if one exists which is a D-Bus
898
901
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"))):
903
for cls in self.__class__.__mro__:
904
for name, value in inspect.getmembers(
905
cls, self._is_dbus_thing("property")):
904
906
if (value._dbus_name == property_name
905
907
and value._dbus_interface == interface_name):
906
908
return value.__get__(self)
908
910
# No such property
909
raise DBusPropertyNotFound(self.dbus_object_path + ":"
910
+ interface_name + "."
911
raise DBusPropertyNotFound("{}:{}.{}".format(
912
self.dbus_object_path, interface_name, property_name))
913
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
914
@dbus.service.method(dbus.PROPERTIES_IFACE,
914
916
out_signature="v")
915
917
def Get(self, interface_name, property_name):
916
918
"""Standard D-Bus property Get() method, see D-Bus standard.
962
965
if not hasattr(value, "variant_level"):
963
966
properties[name] = value
965
properties[name] = type(value)(value, variant_level=
966
value.variant_level+1)
968
properties[name] = type(value)(
969
value, variant_level = value.variant_level + 1)
967
970
return dbus.Dictionary(properties, signature="sv")
972
@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
973
def PropertiesChanged(self, interface_name, changed_properties,
974
invalidated_properties):
975
"""Standard D-Bus PropertiesChanged() signal, see D-Bus
969
980
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
970
981
out_signature="s",
971
982
path_keyword='object_path',
1089
1100
# Ignore non-D-Bus attributes, and D-Bus attributes
1090
1101
# with the wrong interface name
1091
1102
if (not hasattr(attribute, "_dbus_interface")
1092
or not attribute._dbus_interface
1093
.startswith(orig_interface_name)):
1103
or not attribute._dbus_interface.startswith(
1104
orig_interface_name)):
1095
1106
# Create an alternate D-Bus interface name based on
1096
1107
# the current name
1097
alt_interface = (attribute._dbus_interface
1098
.replace(orig_interface_name,
1099
alt_interface_name))
1108
alt_interface = attribute._dbus_interface.replace(
1109
orig_interface_name, alt_interface_name)
1100
1110
interface_names.add(alt_interface)
1101
1111
# Is this a D-Bus signal?
1102
1112
if getattr(attribute, "_dbus_is_signal", False):
1103
# Extract the original non-method undecorated
1104
# function by black magic
1105
nonmethod_func = (dict(
1113
if sys.version_info.major == 2:
1114
# Extract the original non-method undecorated
1115
# function by black magic
1116
nonmethod_func = (dict(
1106
1117
zip(attribute.func_code.co_freevars,
1107
attribute.__closure__))["func"]
1118
attribute.__closure__))
1119
["func"].cell_contents)
1121
nonmethod_func = attribute
1109
1122
# Create a new, but exactly alike, function
1110
1123
# object, and decorate it to be a new D-Bus signal
1111
1124
# with the alternate D-Bus interface name
1112
new_function = (dbus.service.signal
1114
attribute._dbus_signature)
1115
(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)))
1125
if sys.version_info.major == 2:
1126
new_function = types.FunctionType(
1127
nonmethod_func.func_code,
1128
nonmethod_func.func_globals,
1129
nonmethod_func.func_name,
1130
nonmethod_func.func_defaults,
1131
nonmethod_func.func_closure)
1133
new_function = types.FunctionType(
1134
nonmethod_func.__code__,
1135
nonmethod_func.__globals__,
1136
nonmethod_func.__name__,
1137
nonmethod_func.__defaults__,
1138
nonmethod_func.__closure__)
1139
new_function = (dbus.service.signal(
1141
attribute._dbus_signature)(new_function))
1121
1142
# Copy annotations, if any
1123
new_function._dbus_annotations = (
1124
dict(attribute._dbus_annotations))
1144
new_function._dbus_annotations = dict(
1145
attribute._dbus_annotations)
1125
1146
except AttributeError:
1127
1148
# Define a creator of a function to call both the
1147
1170
# object. Decorate it to be a new D-Bus method
1148
1171
# with the alternate D-Bus interface name. Add it
1149
1172
# 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)))
1174
dbus.service.method(
1176
attribute._dbus_in_signature,
1177
attribute._dbus_out_signature)
1178
(types.FunctionType(attribute.func_code,
1179
attribute.func_globals,
1180
attribute.func_name,
1181
attribute.func_defaults,
1182
attribute.func_closure)))
1160
1183
# Copy annotations, if any
1162
attr[attrname]._dbus_annotations = (
1163
dict(attribute._dbus_annotations))
1185
attr[attrname]._dbus_annotations = dict(
1186
attribute._dbus_annotations)
1164
1187
except AttributeError:
1166
1189
# Is this a D-Bus property?
1169
1192
# object, and decorate it to be a new D-Bus
1170
1193
# property with the alternate D-Bus interface
1171
1194
# 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)))
1195
attr[attrname] = (dbus_service_property(
1196
alt_interface, attribute._dbus_signature,
1197
attribute._dbus_access,
1198
attribute._dbus_get_args_options
1200
(types.FunctionType(
1201
attribute.func_code,
1202
attribute.func_globals,
1203
attribute.func_name,
1204
attribute.func_defaults,
1205
attribute.func_closure)))
1185
1206
# Copy annotations, if any
1187
attr[attrname]._dbus_annotations = (
1188
dict(attribute._dbus_annotations))
1208
attr[attrname]._dbus_annotations = dict(
1209
attribute._dbus_annotations)
1189
1210
except AttributeError:
1191
1212
# Is this a D-Bus interface?
1194
1215
# object. Decorate it to be a new D-Bus interface
1195
1216
# with the alternate D-Bus interface name. Add it
1196
1217
# 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)))
1219
dbus_interface_annotations(alt_interface)
1220
(types.FunctionType(attribute.func_code,
1221
attribute.func_globals,
1222
attribute.func_name,
1223
attribute.func_defaults,
1224
attribute.func_closure)))
1206
1226
# Deprecate all alternate interfaces
1207
iname="_AlternateDBusNames_interface_annotation{0}"
1227
iname="_AlternateDBusNames_interface_annotation{}"
1208
1228
for interface_name in interface_names:
1209
1230
@dbus_interface_annotations(interface_name)
1210
1231
def func(self):
1211
1232
return { "org.freedesktop.DBus.Deprecated":
1213
1234
# Find an unused name
1214
1235
for aname in (iname.format(i)
1215
1236
for i in itertools.count()):
1245
1269
Client.__init__(self, *args, **kwargs)
1246
1270
# Only now, when this client is initialized, can it show up on
1248
client_object_name = unicode(self.name).translate(
1272
client_object_name = str(self.name).translate(
1249
1273
{ord("."): ord("_"),
1250
1274
ord("-"): ord("_")})
1251
self.dbus_object_path = (dbus.ObjectPath
1252
("/clients/" + client_object_name))
1275
self.dbus_object_path = dbus.ObjectPath(
1276
"/clients/" + client_object_name)
1253
1277
DBusObjectWithProperties.__init__(self, self.bus,
1254
1278
self.dbus_object_path)
1256
def notifychangeproperty(transform_func,
1257
dbus_name, type_func=lambda x: x,
1280
def notifychangeproperty(transform_func, dbus_name,
1281
type_func=lambda x: x,
1283
invalidate_only=False,
1284
_interface=_interface):
1259
1285
""" Modify a variable so that it's a property which announces
1260
1286
its changes to DBus.
1266
1292
to the D-Bus. Default: no transform
1267
1293
variant_level: D-Bus variant level. Default: 1
1269
attrname = "_{0}".format(dbus_name)
1295
attrname = "_{}".format(dbus_name)
1270
1297
def setter(self, value):
1271
1298
if hasattr(self, "dbus_object_path"):
1272
1299
if (not hasattr(self, attrname) or
1273
1300
type_func(getattr(self, attrname, None))
1274
1301
!= type_func(value)):
1275
dbus_value = transform_func(type_func(value),
1278
self.PropertyChanged(dbus.String(dbus_name),
1303
self.PropertiesChanged(
1304
_interface, dbus.Dictionary(),
1305
dbus.Array((dbus_name, )))
1307
dbus_value = transform_func(
1309
variant_level = variant_level)
1310
self.PropertyChanged(dbus.String(dbus_name),
1312
self.PropertiesChanged(
1314
dbus.Dictionary({ dbus.String(dbus_name):
1280
1317
setattr(self, attrname, value)
1282
1319
return property(lambda self: getattr(self, attrname), setter)
1288
1325
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1289
1326
last_enabled = notifychangeproperty(datetime_to_dbus,
1291
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1292
type_func = lambda checker:
1293
checker is not None)
1328
checker = notifychangeproperty(
1329
dbus.Boolean, "CheckerRunning",
1330
type_func = lambda checker: checker is not None)
1294
1331
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1295
1332
"LastCheckedOK")
1296
1333
last_checker_status = notifychangeproperty(dbus.Int16,
1299
1336
datetime_to_dbus, "LastApprovalRequest")
1300
1337
approved_by_default = notifychangeproperty(dbus.Boolean,
1301
1338
"ApprovedByDefault")
1302
approval_delay = notifychangeproperty(dbus.UInt64,
1305
timedelta_to_milliseconds)
1339
approval_delay = notifychangeproperty(
1340
dbus.UInt64, "ApprovalDelay",
1341
type_func = lambda td: td.total_seconds() * 1000)
1306
1342
approval_duration = notifychangeproperty(
1307
1343
dbus.UInt64, "ApprovalDuration",
1308
type_func = timedelta_to_milliseconds)
1344
type_func = lambda td: td.total_seconds() * 1000)
1309
1345
host = notifychangeproperty(dbus.String, "Host")
1310
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1312
timedelta_to_milliseconds)
1346
timeout = notifychangeproperty(
1347
dbus.UInt64, "Timeout",
1348
type_func = lambda td: td.total_seconds() * 1000)
1313
1349
extended_timeout = notifychangeproperty(
1314
1350
dbus.UInt64, "ExtendedTimeout",
1315
type_func = timedelta_to_milliseconds)
1316
interval = notifychangeproperty(dbus.UInt64,
1319
timedelta_to_milliseconds)
1351
type_func = lambda td: td.total_seconds() * 1000)
1352
interval = notifychangeproperty(
1353
dbus.UInt64, "Interval",
1354
type_func = lambda td: td.total_seconds() * 1000)
1320
1355
checker_command = notifychangeproperty(dbus.String, "Checker")
1356
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1357
invalidate_only=True)
1322
1359
del notifychangeproperty
1330
1367
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1331
1368
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)
1370
def checker_callback(self, source, condition,
1371
connection, command, *args, **kwargs):
1372
ret = Client.checker_callback(self, source, condition,
1373
connection, command, *args,
1375
exitstatus = self.last_checker_status
1339
1377
# Emit D-Bus signal
1340
1378
self.CheckerCompleted(dbus.Int16(exitstatus),
1341
dbus.Int64(condition),
1342
1380
dbus.String(command))
1344
1382
# Emit D-Bus signal
1345
1383
self.CheckerCompleted(dbus.Int16(-1),
1346
dbus.Int64(condition),
1385
self.last_checker_signal),
1347
1386
dbus.String(command))
1349
return Client.checker_callback(self, pid, condition, command,
1352
1389
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
1390
old_checker_pid = getattr(self.checker, "pid", None)
1358
1391
r = Client.start_checker(self, *args, **kwargs)
1359
1392
# Only if new checker process was started
1360
1393
if (self.checker is not None
1476
1504
self.approved_by_default = bool(value)
1478
1506
# ApprovalDelay - property
1479
@dbus_service_property(_interface, signature="t",
1507
@dbus_service_property(_interface,
1480
1509
access="readwrite")
1481
1510
def ApprovalDelay_dbus_property(self, value=None):
1482
1511
if value is None: # get
1483
return dbus.UInt64(self.approval_delay_milliseconds())
1512
return dbus.UInt64(self.approval_delay.total_seconds()
1484
1514
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1486
1516
# ApprovalDuration - property
1487
@dbus_service_property(_interface, signature="t",
1517
@dbus_service_property(_interface,
1488
1519
access="readwrite")
1489
1520
def ApprovalDuration_dbus_property(self, value=None):
1490
1521
if value is None: # get
1491
return dbus.UInt64(timedelta_to_milliseconds(
1492
self.approval_duration))
1522
return dbus.UInt64(self.approval_duration.total_seconds()
1493
1524
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1495
1526
# Name - property
1578
1612
gobject.source_remove(self.disable_initiator_tag)
1579
self.disable_initiator_tag = (
1580
gobject.timeout_add(
1581
timedelta_to_milliseconds(self.expires - now),
1613
self.disable_initiator_tag = gobject.timeout_add(
1614
int((self.expires - now).total_seconds() * 1000),
1584
1617
# ExtendedTimeout - property
1585
@dbus_service_property(_interface, signature="t",
1618
@dbus_service_property(_interface,
1586
1620
access="readwrite")
1587
1621
def ExtendedTimeout_dbus_property(self, value=None):
1588
1622
if value is None: # get
1589
return dbus.UInt64(self.extended_timeout_milliseconds())
1623
return dbus.UInt64(self.extended_timeout.total_seconds()
1590
1625
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1592
1627
# Interval - property
1593
@dbus_service_property(_interface, signature="t",
1628
@dbus_service_property(_interface,
1594
1630
access="readwrite")
1595
1631
def Interval_dbus_property(self, value=None):
1596
1632
if value is None: # get
1597
return dbus.UInt64(self.interval_milliseconds())
1633
return dbus.UInt64(self.interval.total_seconds() * 1000)
1598
1634
self.interval = datetime.timedelta(0, 0, 0, value)
1599
1635
if getattr(self, "checker_initiator_tag", None) is None:
1601
1637
if self.enabled:
1602
1638
# Reschedule checker run
1603
1639
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
1640
self.checker_initiator_tag = gobject.timeout_add(
1641
value, self.start_checker)
1642
self.start_checker() # Start one now, too
1608
1644
# Checker - property
1609
@dbus_service_property(_interface, signature="s",
1645
@dbus_service_property(_interface,
1610
1647
access="readwrite")
1611
1648
def Checker_dbus_property(self, value=None):
1612
1649
if value is None: # get
1613
1650
return dbus.String(self.checker_command)
1614
self.checker_command = unicode(value)
1651
self.checker_command = str(value)
1616
1653
# CheckerRunning - property
1617
@dbus_service_property(_interface, signature="b",
1654
@dbus_service_property(_interface,
1618
1656
access="readwrite")
1619
1657
def CheckerRunning_dbus_property(self, value=None):
1620
1658
if value is None: # get
1673
1715
def handle(self):
1674
1716
with contextlib.closing(self.server.child_pipe) as child_pipe:
1675
1717
logger.info("TCP connection from: %s",
1676
unicode(self.client_address))
1718
str(self.client_address))
1677
1719
logger.debug("Pipe FD: %d",
1678
1720
self.server.child_pipe.fileno())
1680
session = (gnutls.connection
1681
.ClientSession(self.request,
1683
.X509Credentials()))
1722
session = gnutls.connection.ClientSession(
1723
self.request, gnutls.connection .X509Credentials())
1685
1725
# Note: gnutls.connection.X509Credentials is really a
1686
1726
# generic GnuTLS certificate credentials object so long as
1846
1883
def fingerprint(openpgp):
1847
1884
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1848
1885
# 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))))
1886
datum = gnutls.library.types.gnutls_datum_t(
1887
ctypes.cast(ctypes.c_char_p(openpgp),
1888
ctypes.POINTER(ctypes.c_ubyte)),
1889
ctypes.c_uint(len(openpgp)))
1854
1890
# New empty GnuTLS certificate
1855
1891
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1856
(gnutls.library.functions
1857
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1892
gnutls.library.functions.gnutls_openpgp_crt_init(
1858
1894
# 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))
1895
gnutls.library.functions.gnutls_openpgp_crt_import(
1896
crt, ctypes.byref(datum),
1897
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
1863
1898
# Verify the self signature in the key
1864
1899
crtverify = ctypes.c_uint()
1865
(gnutls.library.functions
1866
.gnutls_openpgp_crt_verify_self(crt, 0,
1867
ctypes.byref(crtverify)))
1900
gnutls.library.functions.gnutls_openpgp_crt_verify_self(
1901
crt, 0, ctypes.byref(crtverify))
1868
1902
if crtverify.value != 0:
1869
1903
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1870
raise (gnutls.errors.CertificateSecurityError
1904
raise gnutls.errors.CertificateSecurityError(
1872
1906
# New buffer for the fingerprint
1873
1907
buf = ctypes.create_string_buffer(20)
1874
1908
buf_len = ctypes.c_size_t()
1875
1909
# 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)))
1910
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint(
1911
crt, ctypes.byref(buf), ctypes.byref(buf_len))
1879
1912
# Deinit the certificate
1880
1913
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1881
1914
# Convert the buffer to a Python bytestring
2049
2092
def add_pipe(self, parent_pipe, proc):
2050
2093
# 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,
2094
gobject.io_add_watch(
2095
parent_pipe.fileno(),
2096
gobject.IO_IN | gobject.IO_HUP,
2097
functools.partial(self.handle_ipc,
2098
parent_pipe = parent_pipe,
2058
def handle_ipc(self, source, condition, parent_pipe=None,
2059
proc = None, client_object=None):
2101
def handle_ipc(self, source, condition,
2104
client_object=None):
2060
2105
# error, or the other end of multiprocessing.Pipe has closed
2061
2106
if condition & (gobject.IO_ERR | gobject.IO_HUP):
2062
2107
# Wait for other process to exit
2149
2194
# avoid excessive use of external libraries.
2151
2196
# New type for defining tokens, syntax, and semantics all-in-one
2152
Token = collections.namedtuple("Token",
2153
("regexp", # To match token; if
2154
# "value" is not None,
2155
# must have a "group"
2157
"value", # datetime.timedelta or
2159
"followers")) # Tokens valid after
2197
Token = collections.namedtuple("Token", (
2198
"regexp", # To match token; if "value" is not None, must have
2199
# a "group" containing digits
2200
"value", # datetime.timedelta or None
2201
"followers")) # Tokens valid after this token
2161
2202
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2162
2203
# the "duration" ABNF definition in RFC 3339, Appendix A.
2163
2204
token_end = Token(re.compile(r"$"), None, frozenset())
2164
2205
token_second = Token(re.compile(r"(\d+)S"),
2165
2206
datetime.timedelta(seconds=1),
2166
frozenset((token_end,)))
2207
frozenset((token_end, )))
2167
2208
token_minute = Token(re.compile(r"(\d+)M"),
2168
2209
datetime.timedelta(minutes=1),
2169
2210
frozenset((token_second, token_end)))
2185
2226
frozenset((token_month, token_end)))
2186
2227
token_week = Token(re.compile(r"(\d+)W"),
2187
2228
datetime.timedelta(weeks=1),
2188
frozenset((token_end,)))
2229
frozenset((token_end, )))
2189
2230
token_duration = Token(re.compile(r"P"), None,
2190
2231
frozenset((token_year, token_month,
2191
2232
token_day, token_time,
2193
2234
# Define starting values
2194
2235
value = datetime.timedelta() # Value so far
2195
2236
found_token = None
2196
followers = frozenset(token_duration,) # Following valid tokens
2237
followers = frozenset((token_duration, )) # Following valid tokens
2197
2238
s = duration # String left to parse
2198
2239
# Loop until end token is found
2199
2240
while found_token is not token_end:
2338
2379
help="Directory to save/restore state in")
2339
2380
parser.add_argument("--foreground", action="store_true",
2340
2381
help="Run in foreground", default=None)
2382
parser.add_argument("--no-zeroconf", action="store_false",
2383
dest="zeroconf", help="Do not use Zeroconf",
2342
2386
options = parser.parse_args()
2344
2388
if options.check:
2390
fail_count, test_count = doctest.testmod()
2391
sys.exit(os.EX_OK if fail_count == 0 else 1)
2349
2393
# Default values for config file for server-global settings
2350
2394
server_defaults = { "interface": "",
2391
2436
# Override the settings from the config file with command line
2392
2437
# options, if set.
2393
2438
for option in ("interface", "address", "port", "debug",
2394
"priority", "servicename", "configdir",
2395
"use_dbus", "use_ipv6", "debuglevel", "restore",
2396
"statedir", "socket", "foreground"):
2439
"priority", "servicename", "configdir", "use_dbus",
2440
"use_ipv6", "debuglevel", "restore", "statedir",
2441
"socket", "foreground", "zeroconf"):
2397
2442
value = getattr(options, option)
2398
2443
if value is not None:
2399
2444
server_settings[option] = value
2401
2446
# Force all strings to be unicode
2402
2447
for option in server_settings.keys():
2403
if type(server_settings[option]) is str:
2404
server_settings[option] = unicode(server_settings[option])
2448
if isinstance(server_settings[option], bytes):
2449
server_settings[option] = (server_settings[option]
2405
2451
# Force all boolean options to be boolean
2406
2452
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2453
"foreground", "zeroconf"):
2408
2454
server_settings[option] = bool(server_settings[option])
2409
2455
# Debug implies foreground
2410
2456
if server_settings["debug"]:
2447
2498
global mandos_dbus_service
2448
2499
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"]
2502
if server_settings["socket"] != "":
2503
socketfd = server_settings["socket"]
2504
tcp_server = MandosServer(
2505
(server_settings["address"], server_settings["port"]),
2507
interface=(server_settings["interface"] or None),
2509
gnutls_priority=server_settings["priority"],
2461
2512
if not foreground:
2462
2513
pidfilename = "/run/mandos.pid"
2463
2514
if not os.path.isdir("/run/."):
2464
2515
pidfilename = "/var/run/mandos.pid"
2467
pidfile = open(pidfilename, "w")
2518
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
2468
2519
except IOError as e:
2469
2520
logger.error("Could not open file %r", pidfilename,
2526
2577
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,
2531
except dbus.exceptions.NameExistsException as e:
2580
old_bus_name = dbus.service.BusName(
2581
"se.bsnet.fukt.Mandos", bus,
2583
except dbus.exceptions.DBusException as e:
2532
2584
logger.error("Disabling D-Bus:", exc_info=e)
2533
2585
use_dbus = False
2534
2586
server_settings["use_dbus"] = False
2535
2587
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"])))
2589
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2590
service = AvahiServiceToSyslog(
2591
name = server_settings["servicename"],
2592
servicetype = "_mandos._tcp",
2593
protocol = protocol,
2595
if server_settings["interface"]:
2596
service.interface = if_nametoindex(
2597
server_settings["interface"].encode("utf-8"))
2545
2599
global multiprocessing_manager
2546
2600
multiprocessing_manager = multiprocessing.Manager()
2565
2619
if server_settings["restore"]:
2567
2621
with open(stored_state_path, "rb") as stored_state:
2568
clients_data, old_client_settings = (pickle.load
2622
clients_data, old_client_settings = pickle.load(
2570
2624
os.remove(stored_state_path)
2571
2625
except IOError as e:
2572
2626
if e.errno == errno.ENOENT:
2573
logger.warning("Could not load persistent state: {0}"
2574
.format(os.strerror(e.errno)))
2627
logger.warning("Could not load persistent state:"
2628
" {}".format(os.strerror(e.errno)))
2576
2630
logger.critical("Could not load persistent state:",
2579
2633
except EOFError as e:
2580
2634
logger.warning("Could not load persistent state: "
2581
"EOFError:", exc_info=e)
2583
2638
with PGPEngine() as pgp:
2584
for client_name, client in clients_data.iteritems():
2639
for client_name, client in clients_data.items():
2585
2640
# Skip removed clients
2586
2641
if client_name not in client_settings:
2612
2667
if datetime.datetime.utcnow() >= client["expires"]:
2613
2668
if not client["last_checked_ok"]:
2614
2669
logger.warning(
2615
"disabling client {0} - Client never "
2616
"performed a successful checker"
2617
.format(client_name))
2670
"disabling client {} - Client never "
2671
"performed a successful checker".format(
2618
2673
client["enabled"] = False
2619
2674
elif client["last_checker_status"] != 0:
2620
2675
logger.warning(
2621
"disabling client {0} - Client "
2622
"last checker failed with error code {1}"
2623
.format(client_name,
2624
client["last_checker_status"]))
2676
"disabling client {} - Client last"
2677
" checker failed with error code"
2680
client["last_checker_status"]))
2625
2681
client["enabled"] = False
2627
client["expires"] = (datetime.datetime
2629
+ client["timeout"])
2683
client["expires"] = (
2684
datetime.datetime.utcnow()
2685
+ client["timeout"])
2630
2686
logger.debug("Last checker succeeded,"
2631
" keeping {0} enabled"
2632
.format(client_name))
2687
" keeping {} enabled".format(
2634
client["secret"] = (
2635
pgp.decrypt(client["encrypted_secret"],
2636
client_settings[client_name]
2690
client["secret"] = pgp.decrypt(
2691
client["encrypted_secret"],
2692
client_settings[client_name]["secret"])
2638
2693
except PGPError:
2639
2694
# 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"])
2695
logger.debug("Failed to decrypt {} old secret".format(
2697
client["secret"] = (client_settings[client_name]
2645
2700
# Add/remove clients based on new changes made to config
2646
2701
for client_name in (set(old_client_settings)
2675
2731
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2678
@alternate_dbus_interfaces({"se.recompile.Mandos":
2679
"se.bsnet.fukt.Mandos"})
2735
@alternate_dbus_interfaces(
2736
{ "se.recompile.Mandos": "se.bsnet.fukt.Mandos" })
2680
2737
class MandosDBusService(DBusObjectWithProperties):
2681
2738
"""A D-Bus proxy object"""
2682
2740
def __init__(self):
2683
2741
dbus.service.Object.__init__(self, bus, "/")
2684
2743
_interface = "se.recompile.Mandos"
2686
2745
@dbus_interface_annotations(_interface)
2687
2746
def _foo(self):
2688
return { "org.freedesktop.DBus.Property"
2689
".EmitsChangedSignal":
2748
"org.freedesktop.DBus.Property.EmitsChangedSignal":
2692
2751
@dbus.service.signal(_interface, signature="o")
2693
2752
def ClientAdded(self, objpath):
2761
2820
# 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)):
2822
exclude = { "bus", "changedstate", "secret",
2823
"checker", "server_settings" }
2824
for name, typ in inspect.getmembers(dbus.service
2767
2826
exclude.add(name)
2769
2828
client_dict["encrypted_secret"] = (client
2776
2835
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:
2838
with tempfile.NamedTemporaryFile(
2842
dir=os.path.dirname(stored_state_path),
2843
delete=False) as stored_state:
2783
2844
pickle.dump((clients, client_settings), stored_state)
2784
tempname=stored_state.name
2845
tempname = stored_state.name
2785
2846
os.rename(tempname, stored_state_path)
2786
2847
except (IOError, OSError) as e: