82
86
SO_BINDTODEVICE = None
90
stored_state_file = "clients.pickle"
87
#logger = logging.getLogger('mandos')
88
logger = logging.Logger('mandos')
92
logger = logging.getLogger()
89
93
syslogger = (logging.handlers.SysLogHandler
90
94
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
91
95
address = str("/dev/log")))
92
syslogger.setFormatter(logging.Formatter
93
('Mandos [%(process)d]: %(levelname)s:'
95
logger.addHandler(syslogger)
97
console = logging.StreamHandler()
98
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
101
logger.addHandler(console)
98
if_nametoindex = (ctypes.cdll.LoadLibrary
99
(ctypes.util.find_library("c"))
101
except (OSError, AttributeError):
102
def if_nametoindex(interface):
103
"Get an interface index the hard way, i.e. using fcntl()"
104
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
105
with contextlib.closing(socket.socket()) as s:
106
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
107
struct.pack(str("16s16x"),
109
interface_index = struct.unpack(str("I"),
111
return interface_index
114
def initlogger(level=logging.WARNING):
115
"""init logger and add loglevel"""
117
syslogger.setFormatter(logging.Formatter
118
('Mandos [%(process)d]: %(levelname)s:'
120
logger.addHandler(syslogger)
122
console = logging.StreamHandler()
123
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
127
logger.addHandler(console)
128
logger.setLevel(level)
131
class PGPError(Exception):
132
"""Exception if encryption/decryption fails"""
136
class PGPEngine(object):
137
"""A simple class for OpenPGP symmetric encryption & decryption"""
139
self.gnupg = GnuPGInterface.GnuPG()
140
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
141
self.gnupg = GnuPGInterface.GnuPG()
142
self.gnupg.options.meta_interactive = False
143
self.gnupg.options.homedir = self.tempdir
144
self.gnupg.options.extra_args.extend(['--force-mdc',
150
def __exit__ (self, exc_type, exc_value, traceback):
158
if self.tempdir is not None:
159
# Delete contents of tempdir
160
for root, dirs, files in os.walk(self.tempdir,
162
for filename in files:
163
os.remove(os.path.join(root, filename))
165
os.rmdir(os.path.join(root, dirname))
167
os.rmdir(self.tempdir)
170
def password_encode(self, password):
171
# Passphrase can not be empty and can not contain newlines or
172
# NUL bytes. So we prefix it and hex encode it.
173
return b"mandos" + binascii.hexlify(password)
175
def encrypt(self, data, password):
176
self.gnupg.passphrase = self.password_encode(password)
177
with open(os.devnull) as devnull:
179
proc = self.gnupg.run(['--symmetric'],
180
create_fhs=['stdin', 'stdout'],
181
attach_fhs={'stderr': devnull})
182
with contextlib.closing(proc.handles['stdin']) as f:
184
with contextlib.closing(proc.handles['stdout']) as f:
185
ciphertext = f.read()
189
self.gnupg.passphrase = None
192
def decrypt(self, data, password):
193
self.gnupg.passphrase = self.password_encode(password)
194
with open(os.devnull) as devnull:
196
proc = self.gnupg.run(['--decrypt'],
197
create_fhs=['stdin', 'stdout'],
198
attach_fhs={'stderr': devnull})
199
with contextlib.closing(proc.handles['stdin'] ) as f:
201
with contextlib.closing(proc.handles['stdout']) as f:
202
decrypted_plaintext = f.read()
206
self.gnupg.passphrase = None
207
return decrypted_plaintext
103
211
class AvahiError(Exception):
104
212
def __init__(self, value, *args, **kwargs):
158
267
" after %i retries, exiting.",
159
268
self.rename_count)
160
269
raise AvahiServiceError("Too many renames")
161
self.name = unicode(self.server.GetAlternativeServiceName(self.name))
270
self.name = unicode(self.server
271
.GetAlternativeServiceName(self.name))
162
272
logger.info("Changing Zeroconf service name to %r ...",
164
syslogger.setFormatter(logging.Formatter
165
('Mandos (%s) [%%(process)d]:'
166
' %%(levelname)s: %%(message)s'
171
except dbus.exceptions.DBusException, error:
277
except dbus.exceptions.DBusException as error:
172
278
logger.critical("DBusException: %s", error)
175
281
self.rename_count += 1
176
282
def remove(self):
177
283
"""Derived from the Avahi example code"""
284
if self.entry_group_state_changed_match is not None:
285
self.entry_group_state_changed_match.remove()
286
self.entry_group_state_changed_match = None
178
287
if self.group is not None:
179
288
self.group.Reset()
181
290
"""Derived from the Avahi example code"""
182
292
if self.group is None:
183
293
self.group = dbus.Interface(
184
294
self.bus.get_object(avahi.DBUS_NAME,
185
295
self.server.EntryGroupNew()),
186
296
avahi.DBUS_INTERFACE_ENTRY_GROUP)
187
self.group.connect_to_signal('StateChanged',
189
.entry_group_state_changed)
297
self.entry_group_state_changed_match = (
298
self.group.connect_to_signal(
299
'StateChanged', self.entry_group_state_changed))
190
300
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
191
301
self.name, self.type)
192
302
self.group.AddService(
215
325
def cleanup(self):
216
326
"""Derived from the Avahi example code"""
217
327
if self.group is not None:
330
except (dbus.exceptions.UnknownMethodException,
331
dbus.exceptions.DBusException):
219
333
self.group = None
220
def server_state_changed(self, state):
335
def server_state_changed(self, state, error=None):
221
336
"""Derived from the Avahi example code"""
222
337
logger.debug("Avahi server state change: %i", state)
223
if state == avahi.SERVER_COLLISION:
224
logger.error("Zeroconf server name collision")
338
bad_states = { avahi.SERVER_INVALID:
339
"Zeroconf server invalid",
340
avahi.SERVER_REGISTERING: None,
341
avahi.SERVER_COLLISION:
342
"Zeroconf server name collision",
343
avahi.SERVER_FAILURE:
344
"Zeroconf server failure" }
345
if state in bad_states:
346
if bad_states[state] is not None:
348
logger.error(bad_states[state])
350
logger.error(bad_states[state] + ": %r", error)
226
352
elif state == avahi.SERVER_RUNNING:
356
logger.debug("Unknown state: %r", state)
358
logger.debug("Unknown state: %r: %r", state, error)
228
359
def activate(self):
229
360
"""Derived from the Avahi example code"""
230
361
if self.server is None:
231
362
self.server = dbus.Interface(
232
363
self.bus.get_object(avahi.DBUS_NAME,
233
avahi.DBUS_PATH_SERVER),
364
avahi.DBUS_PATH_SERVER,
365
follow_name_owner_changes=True),
234
366
avahi.DBUS_INTERFACE_SERVER)
235
367
self.server.connect_to_signal("StateChanged",
236
368
self.server_state_changed)
237
369
self.server_state_changed(self.server.GetState())
371
class AvahiServiceToSyslog(AvahiService):
373
"""Add the new name to the syslog messages"""
374
ret = AvahiService.rename(self)
375
syslogger.setFormatter(logging.Formatter
376
('Mandos (%s) [%%(process)d]:'
377
' %%(levelname)s: %%(message)s'
381
def timedelta_to_milliseconds(td):
382
"Convert a datetime.timedelta() to milliseconds"
383
return ((td.days * 24 * 60 * 60 * 1000)
384
+ (td.seconds * 1000)
385
+ (td.microseconds // 1000))
240
387
class Client(object):
241
388
"""A representation of a client host served by this server.
244
_approved: bool(); 'None' if not yet approved/disapproved
391
approved: bool(); 'None' if not yet approved/disapproved
245
392
approval_delay: datetime.timedelta(); Time to wait for approval
246
393
approval_duration: datetime.timedelta(); Duration of one approval
247
394
checker: subprocess.Popen(); a running checker process used
264
412
interval: datetime.timedelta(); How often to start a new checker
265
413
last_approval_request: datetime.datetime(); (UTC) or None
266
414
last_checked_ok: datetime.datetime(); (UTC) or None
267
last_enabled: datetime.datetime(); (UTC)
416
last_checker_status: integer between 0 and 255 reflecting exit
417
status of last checker. -1 reflects crashed
419
last_enabled: datetime.datetime(); (UTC) or None
268
420
name: string; from the config file, used in log messages and
269
421
D-Bus identifiers
270
422
secret: bytestring; sent verbatim (over TLS) to client
271
423
timeout: datetime.timedelta(); How long from last_checked_ok
272
424
until this client is disabled
425
extended_timeout: extra long timeout when password has been sent
273
426
runtime_expansions: Allowed attributes for runtime expansion.
427
expires: datetime.datetime(); time (UTC) when a client will be
276
431
runtime_expansions = ("approval_delay", "approval_duration",
278
433
"host", "interval", "last_checked_ok",
279
434
"last_enabled", "name", "timeout")
282
def _timedelta_to_milliseconds(td):
283
"Convert a datetime.timedelta() to milliseconds"
284
return ((td.days * 24 * 60 * 60 * 1000)
285
+ (td.seconds * 1000)
286
+ (td.microseconds // 1000))
288
436
def timeout_milliseconds(self):
289
437
"Return the 'timeout' attribute in milliseconds"
290
return self._timedelta_to_milliseconds(self.timeout)
438
return timedelta_to_milliseconds(self.timeout)
440
def extended_timeout_milliseconds(self):
441
"Return the 'extended_timeout' attribute in milliseconds"
442
return timedelta_to_milliseconds(self.extended_timeout)
292
444
def interval_milliseconds(self):
293
445
"Return the 'interval' attribute in milliseconds"
294
return self._timedelta_to_milliseconds(self.interval)
446
return timedelta_to_milliseconds(self.interval)
296
448
def approval_delay_milliseconds(self):
297
return self._timedelta_to_milliseconds(self.approval_delay)
449
return timedelta_to_milliseconds(self.approval_delay)
299
def __init__(self, name = None, disable_hook=None, config=None):
451
def __init__(self, name = None, config=None):
300
452
"""Note: the 'checker' key in 'config' sets the
301
453
'checker_command' attribute and *not* the 'checker'
323
475
self.host = config.get("host", "")
324
476
self.created = datetime.datetime.utcnow()
477
self.enabled = config.get("enabled", True)
326
478
self.last_approval_request = None
327
self.last_enabled = None
480
self.last_enabled = datetime.datetime.utcnow()
482
self.last_enabled = None
328
483
self.last_checked_ok = None
484
self.last_checker_status = None
329
485
self.timeout = string_to_delta(config["timeout"])
486
self.extended_timeout = string_to_delta(config
487
["extended_timeout"])
330
488
self.interval = string_to_delta(config["interval"])
331
self.disable_hook = disable_hook
332
489
self.checker = None
333
490
self.checker_initiator_tag = None
334
491
self.disable_initiator_tag = None
493
self.expires = datetime.datetime.utcnow() + self.timeout
335
496
self.checker_callback_tag = None
336
497
self.checker_command = config["checker"]
337
498
self.current_checker_command = None
338
self.last_connect = None
339
self._approved = None
340
500
self.approved_by_default = config.get("approved_by_default",
342
502
self.approvals_pending = 0
344
504
config["approval_delay"])
345
505
self.approval_duration = string_to_delta(
346
506
config["approval_duration"])
347
self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())
507
self.changedstate = (multiprocessing_manager
508
.Condition(multiprocessing_manager
510
self.client_structure = [attr for attr in
511
self.__dict__.iterkeys()
512
if not attr.startswith("_")]
513
self.client_structure.append("client_structure")
515
for name, t in inspect.getmembers(type(self),
519
if not name.startswith("_"):
520
self.client_structure.append(name)
522
# Send notice to process children that client state has changed
349
523
def send_changedstate(self):
350
self.changedstate.acquire()
351
self.changedstate.notify_all()
352
self.changedstate.release()
524
with self.changedstate:
525
self.changedstate.notify_all()
354
527
def enable(self):
355
528
"""Start this client's checker and timeout hooks"""
356
529
if getattr(self, "enabled", False):
357
530
# Already enabled
359
532
self.send_changedstate()
533
self.expires = datetime.datetime.utcnow() + self.timeout
360
535
self.last_enabled = datetime.datetime.utcnow()
361
# Schedule a new checker to be started an 'interval' from now,
362
# and every interval from then on.
363
self.checker_initiator_tag = (gobject.timeout_add
364
(self.interval_milliseconds(),
366
# Schedule a disable() when 'timeout' has passed
367
self.disable_initiator_tag = (gobject.timeout_add
368
(self.timeout_milliseconds(),
371
# Also start a new checker *right now*.
374
538
def disable(self, quiet=True):
375
539
"""Disable this client."""
382
546
if getattr(self, "disable_initiator_tag", False):
383
547
gobject.source_remove(self.disable_initiator_tag)
384
548
self.disable_initiator_tag = None
385
550
if getattr(self, "checker_initiator_tag", False):
386
551
gobject.source_remove(self.checker_initiator_tag)
387
552
self.checker_initiator_tag = None
388
553
self.stop_checker()
389
if self.disable_hook:
390
self.disable_hook(self)
391
554
self.enabled = False
392
555
# Do not run this again if called by a gobject.timeout_add
395
558
def __del__(self):
396
self.disable_hook = None
561
def init_checker(self):
562
# Schedule a new checker to be started an 'interval' from now,
563
# and every interval from then on.
564
self.checker_initiator_tag = (gobject.timeout_add
565
(self.interval_milliseconds(),
567
# Schedule a disable() when 'timeout' has passed
568
self.disable_initiator_tag = (gobject.timeout_add
569
(self.timeout_milliseconds(),
571
# Also start a new checker *right now*.
399
574
def checker_callback(self, pid, condition, command):
400
575
"""The checker has completed, so take appropriate actions."""
401
576
self.checker_callback_tag = None
402
577
self.checker = None
403
578
if os.WIFEXITED(condition):
404
exitstatus = os.WEXITSTATUS(condition)
579
self.last_checker_status = os.WEXITSTATUS(condition)
580
if self.last_checker_status == 0:
406
581
logger.info("Checker for %(name)s succeeded",
408
583
self.checked_ok()
410
585
logger.info("Checker for %(name)s failed",
588
self.last_checker_status = -1
413
589
logger.warning("Checker for %(name)s crashed?",
416
def checked_ok(self):
592
def checked_ok(self, timeout=None):
417
593
"""Bump up the timeout for this client.
419
595
This should only be called when the client has been seen,
599
timeout = self.timeout
422
600
self.last_checked_ok = datetime.datetime.utcnow()
423
gobject.source_remove(self.disable_initiator_tag)
424
self.disable_initiator_tag = (gobject.timeout_add
425
(self.timeout_milliseconds(),
601
if self.disable_initiator_tag is not None:
602
gobject.source_remove(self.disable_initiator_tag)
603
if getattr(self, "enabled", False):
604
self.disable_initiator_tag = (gobject.timeout_add
605
(timedelta_to_milliseconds
606
(timeout), self.disable))
607
self.expires = datetime.datetime.utcnow() + timeout
428
609
def need_approval(self):
429
610
self.last_approval_request = datetime.datetime.utcnow()
585
767
def _get_all_dbus_properties(self):
586
768
"""Returns a generator of (name, attribute) pairs
588
return ((prop._dbus_name, prop)
770
return ((prop.__get__(self)._dbus_name, prop.__get__(self))
771
for cls in self.__class__.__mro__
589
772
for name, prop in
590
inspect.getmembers(self, self._is_dbus_property))
773
inspect.getmembers(cls, self._is_dbus_property))
592
775
def _get_dbus_property(self, interface_name, property_name):
593
776
"""Returns a bound method if one exists which is a D-Bus
594
777
property with the specified name and interface.
596
for name in (property_name,
597
property_name + "_dbus_property"):
598
prop = getattr(self, name, None)
600
or not self._is_dbus_property(prop)
601
or prop._dbus_name != property_name
602
or (interface_name and prop._dbus_interface
603
and interface_name != prop._dbus_interface)):
779
for cls in self.__class__.__mro__:
780
for name, value in (inspect.getmembers
781
(cls, self._is_dbus_property)):
782
if (value._dbus_name == property_name
783
and value._dbus_interface == interface_name):
784
return value.__get__(self)
606
786
# No such property
607
787
raise DBusPropertyNotFound(self.dbus_object_path + ":"
608
788
+ interface_name + "."
704
884
xmlstring = document.toxml("utf-8")
705
885
document.unlink()
706
886
except (AttributeError, xml.dom.DOMException,
707
xml.parsers.expat.ExpatError), error:
887
xml.parsers.expat.ExpatError) as error:
708
888
logger.error("Failed to override Introspection method",
893
def datetime_to_dbus (dt, variant_level=0):
894
"""Convert a UTC datetime.datetime() to a D-Bus type."""
896
return dbus.String("", variant_level = variant_level)
897
return dbus.String(dt.isoformat(),
898
variant_level=variant_level)
901
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
903
"""Applied to an empty subclass of a D-Bus object, this metaclass
904
will add additional D-Bus attributes matching a certain pattern.
906
def __new__(mcs, name, bases, attr):
907
# Go through all the base classes which could have D-Bus
908
# methods, signals, or properties in them
909
for base in (b for b in bases
910
if issubclass(b, dbus.service.Object)):
911
# Go though all attributes of the base class
912
for attrname, attribute in inspect.getmembers(base):
913
# Ignore non-D-Bus attributes, and D-Bus attributes
914
# with the wrong interface name
915
if (not hasattr(attribute, "_dbus_interface")
916
or not attribute._dbus_interface
917
.startswith("se.recompile.Mandos")):
919
# Create an alternate D-Bus interface name based on
921
alt_interface = (attribute._dbus_interface
922
.replace("se.recompile.Mandos",
923
"se.bsnet.fukt.Mandos"))
924
# Is this a D-Bus signal?
925
if getattr(attribute, "_dbus_is_signal", False):
926
# Extract the original non-method function by
928
nonmethod_func = (dict(
929
zip(attribute.func_code.co_freevars,
930
attribute.__closure__))["func"]
932
# Create a new, but exactly alike, function
933
# object, and decorate it to be a new D-Bus signal
934
# with the alternate D-Bus interface name
935
new_function = (dbus.service.signal
937
attribute._dbus_signature)
939
nonmethod_func.func_code,
940
nonmethod_func.func_globals,
941
nonmethod_func.func_name,
942
nonmethod_func.func_defaults,
943
nonmethod_func.func_closure)))
944
# Define a creator of a function to call both the
945
# old and new functions, so both the old and new
946
# signals gets sent when the function is called
947
def fixscope(func1, func2):
948
"""This function is a scope container to pass
949
func1 and func2 to the "call_both" function
950
outside of its arguments"""
951
def call_both(*args, **kwargs):
952
"""This function will emit two D-Bus
953
signals by calling func1 and func2"""
954
func1(*args, **kwargs)
955
func2(*args, **kwargs)
957
# Create the "call_both" function and add it to
959
attr[attrname] = fixscope(attribute,
961
# Is this a D-Bus method?
962
elif getattr(attribute, "_dbus_is_method", False):
963
# Create a new, but exactly alike, function
964
# object. Decorate it to be a new D-Bus method
965
# with the alternate D-Bus interface name. Add it
967
attr[attrname] = (dbus.service.method
969
attribute._dbus_in_signature,
970
attribute._dbus_out_signature)
972
(attribute.func_code,
973
attribute.func_globals,
975
attribute.func_defaults,
976
attribute.func_closure)))
977
# Is this a D-Bus property?
978
elif getattr(attribute, "_dbus_is_property", False):
979
# Create a new, but exactly alike, function
980
# object, and decorate it to be a new D-Bus
981
# property with the alternate D-Bus interface
982
# name. Add it to the class.
983
attr[attrname] = (dbus_service_property
985
attribute._dbus_signature,
986
attribute._dbus_access,
988
._dbus_get_args_options
991
(attribute.func_code,
992
attribute.func_globals,
994
attribute.func_defaults,
995
attribute.func_closure)))
996
return type.__new__(mcs, name, bases, attr)
713
999
class ClientDBus(Client, DBusObjectWithProperties):
714
1000
"""A Client class using D-Bus
737
1024
DBusObjectWithProperties.__init__(self, self.bus,
738
1025
self.dbus_object_path)
740
def _get_approvals_pending(self):
741
return self._approvals_pending
742
def _set_approvals_pending(self, value):
743
old_value = self._approvals_pending
744
self._approvals_pending = value
746
if (hasattr(self, "dbus_object_path")
747
and bval is not bool(old_value)):
748
dbus_bool = dbus.Boolean(bval, variant_level=1)
749
self.PropertyChanged(dbus.String("ApprovalPending"),
752
approvals_pending = property(_get_approvals_pending,
753
_set_approvals_pending)
754
del _get_approvals_pending, _set_approvals_pending
757
def _datetime_to_dbus(dt, variant_level=0):
758
"""Convert a UTC datetime.datetime() to a D-Bus type."""
759
return dbus.String(dt.isoformat(),
760
variant_level=variant_level)
763
oldstate = getattr(self, "enabled", False)
764
r = Client.enable(self)
765
if oldstate != self.enabled:
767
self.PropertyChanged(dbus.String("Enabled"),
768
dbus.Boolean(True, variant_level=1))
769
self.PropertyChanged(
770
dbus.String("LastEnabled"),
771
self._datetime_to_dbus(self.last_enabled,
775
def disable(self, quiet = False):
776
oldstate = getattr(self, "enabled", False)
777
r = Client.disable(self, quiet=quiet)
778
if not quiet and oldstate != self.enabled:
780
self.PropertyChanged(dbus.String("Enabled"),
781
dbus.Boolean(False, variant_level=1))
1027
def notifychangeproperty(transform_func,
1028
dbus_name, type_func=lambda x: x,
1030
""" Modify a variable so that it's a property which announces
1031
its changes to DBus.
1033
transform_fun: Function that takes a value and a variant_level
1034
and transforms it to a D-Bus type.
1035
dbus_name: D-Bus name of the variable
1036
type_func: Function that transform the value before sending it
1037
to the D-Bus. Default: no transform
1038
variant_level: D-Bus variant level. Default: 1
1040
attrname = "_{0}".format(dbus_name)
1041
def setter(self, value):
1042
if hasattr(self, "dbus_object_path"):
1043
if (not hasattr(self, attrname) or
1044
type_func(getattr(self, attrname, None))
1045
!= type_func(value)):
1046
dbus_value = transform_func(type_func(value),
1049
self.PropertyChanged(dbus.String(dbus_name),
1051
setattr(self, attrname, value)
1053
return property(lambda self: getattr(self, attrname), setter)
1056
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1057
approvals_pending = notifychangeproperty(dbus.Boolean,
1060
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1061
last_enabled = notifychangeproperty(datetime_to_dbus,
1063
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1064
type_func = lambda checker:
1065
checker is not None)
1066
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1068
last_approval_request = notifychangeproperty(
1069
datetime_to_dbus, "LastApprovalRequest")
1070
approved_by_default = notifychangeproperty(dbus.Boolean,
1071
"ApprovedByDefault")
1072
approval_delay = notifychangeproperty(dbus.UInt64,
1075
timedelta_to_milliseconds)
1076
approval_duration = notifychangeproperty(
1077
dbus.UInt64, "ApprovalDuration",
1078
type_func = timedelta_to_milliseconds)
1079
host = notifychangeproperty(dbus.String, "Host")
1080
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1082
timedelta_to_milliseconds)
1083
extended_timeout = notifychangeproperty(
1084
dbus.UInt64, "ExtendedTimeout",
1085
type_func = timedelta_to_milliseconds)
1086
interval = notifychangeproperty(dbus.UInt64,
1089
timedelta_to_milliseconds)
1090
checker_command = notifychangeproperty(dbus.String, "Checker")
1092
del notifychangeproperty
784
1094
def __del__(self, *args, **kwargs):
812
1119
return Client.checker_callback(self, pid, condition, command,
813
1120
*args, **kwargs)
815
def checked_ok(self, *args, **kwargs):
816
r = Client.checked_ok(self, *args, **kwargs)
818
self.PropertyChanged(
819
dbus.String("LastCheckedOK"),
820
(self._datetime_to_dbus(self.last_checked_ok,
824
def need_approval(self, *args, **kwargs):
825
r = Client.need_approval(self, *args, **kwargs)
827
self.PropertyChanged(
828
dbus.String("LastApprovalRequest"),
829
(self._datetime_to_dbus(self.last_approval_request,
833
1122
def start_checker(self, *args, **kwargs):
834
1123
old_checker = self.checker
835
1124
if self.checker is not None:
842
1131
and old_checker_pid != self.checker.pid):
843
1132
# Emit D-Bus signal
844
1133
self.CheckerStarted(self.current_checker_command)
845
self.PropertyChanged(
846
dbus.String("CheckerRunning"),
847
dbus.Boolean(True, variant_level=1))
850
def stop_checker(self, *args, **kwargs):
851
old_checker = getattr(self, "checker", None)
852
r = Client.stop_checker(self, *args, **kwargs)
853
if (old_checker is not None
854
and getattr(self, "checker", None) is None):
855
self.PropertyChanged(dbus.String("CheckerRunning"),
856
dbus.Boolean(False, variant_level=1))
859
1136
def _reset_approved(self):
860
self._approved = None
1137
self.approved = None
863
1140
def approve(self, value=True):
864
1141
self.send_changedstate()
865
self._approved = value
866
gobject.timeout_add(self._timedelta_to_milliseconds
1142
self.approved = value
1143
gobject.timeout_add(timedelta_to_milliseconds
867
1144
(self.approval_duration),
868
1145
self._reset_approved)
871
1148
## D-Bus methods, signals & properties
872
_interface = "se.bsnet.fukt.Mandos.Client"
1149
_interface = "se.recompile.Mandos.Client"
972
1254
if value is None: # get
973
1255
return dbus.UInt64(self.approval_delay_milliseconds())
974
1256
self.approval_delay = datetime.timedelta(0, 0, 0, value)
976
self.PropertyChanged(dbus.String("ApprovalDelay"),
977
dbus.UInt64(value, variant_level=1))
979
1258
# ApprovalDuration - property
980
1259
@dbus_service_property(_interface, signature="t",
981
1260
access="readwrite")
982
1261
def ApprovalDuration_dbus_property(self, value=None):
983
1262
if value is None: # get
984
return dbus.UInt64(self._timedelta_to_milliseconds(
1263
return dbus.UInt64(timedelta_to_milliseconds(
985
1264
self.approval_duration))
986
1265
self.approval_duration = datetime.timedelta(0, 0, 0, value)
988
self.PropertyChanged(dbus.String("ApprovalDuration"),
989
dbus.UInt64(value, variant_level=1))
991
1267
# Name - property
992
1268
@dbus_service_property(_interface, signature="s", access="read")
1004
1280
def Host_dbus_property(self, value=None):
1005
1281
if value is None: # get
1006
1282
return dbus.String(self.host)
1009
self.PropertyChanged(dbus.String("Host"),
1010
dbus.String(value, variant_level=1))
1283
self.host = unicode(value)
1012
1285
# Created - property
1013
1286
@dbus_service_property(_interface, signature="s", access="read")
1014
1287
def Created_dbus_property(self):
1015
return dbus.String(self._datetime_to_dbus(self.created))
1288
return datetime_to_dbus(self.created)
1017
1290
# LastEnabled - property
1018
1291
@dbus_service_property(_interface, signature="s", access="read")
1019
1292
def LastEnabled_dbus_property(self):
1020
if self.last_enabled is None:
1021
return dbus.String("")
1022
return dbus.String(self._datetime_to_dbus(self.last_enabled))
1293
return datetime_to_dbus(self.last_enabled)
1024
1295
# Enabled - property
1025
1296
@dbus_service_property(_interface, signature="b",
1060
1329
if value is None: # get
1061
1330
return dbus.UInt64(self.timeout_milliseconds())
1062
1331
self.timeout = datetime.timedelta(0, 0, 0, value)
1064
self.PropertyChanged(dbus.String("Timeout"),
1065
dbus.UInt64(value, variant_level=1))
1066
1332
if getattr(self, "disable_initiator_tag", None) is None:
1068
1334
# Reschedule timeout
1069
1335
gobject.source_remove(self.disable_initiator_tag)
1070
1336
self.disable_initiator_tag = None
1071
time_to_die = (self.
1072
_timedelta_to_milliseconds((self
1338
time_to_die = timedelta_to_milliseconds((self
1077
1343
if time_to_die <= 0:
1078
1344
# The timeout has passed
1347
self.expires = (datetime.datetime.utcnow()
1348
+ datetime.timedelta(milliseconds =
1081
1350
self.disable_initiator_tag = (gobject.timeout_add
1082
1351
(time_to_die, self.disable))
1353
# ExtendedTimeout - property
1354
@dbus_service_property(_interface, signature="t",
1356
def ExtendedTimeout_dbus_property(self, value=None):
1357
if value is None: # get
1358
return dbus.UInt64(self.extended_timeout_milliseconds())
1359
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1084
1361
# Interval - property
1085
1362
@dbus_service_property(_interface, signature="t",
1086
1363
access="readwrite")
1088
1365
if value is None: # get
1089
1366
return dbus.UInt64(self.interval_milliseconds())
1090
1367
self.interval = datetime.timedelta(0, 0, 0, value)
1092
self.PropertyChanged(dbus.String("Interval"),
1093
dbus.UInt64(value, variant_level=1))
1094
1368
if getattr(self, "checker_initiator_tag", None) is None:
1096
# Reschedule checker run
1097
gobject.source_remove(self.checker_initiator_tag)
1098
self.checker_initiator_tag = (gobject.timeout_add
1099
(value, self.start_checker))
1100
self.start_checker() # Start one now, too
1371
# Reschedule checker run
1372
gobject.source_remove(self.checker_initiator_tag)
1373
self.checker_initiator_tag = (gobject.timeout_add
1374
(value, self.start_checker))
1375
self.start_checker() # Start one now, too
1102
1377
# Checker - property
1103
1378
@dbus_service_property(_interface, signature="s",
1104
1379
access="readwrite")
1105
1380
def Checker_dbus_property(self, value=None):
1106
1381
if value is None: # get
1107
1382
return dbus.String(self.checker_command)
1108
self.checker_command = value
1110
self.PropertyChanged(dbus.String("Checker"),
1111
dbus.String(self.checker_command,
1383
self.checker_command = unicode(value)
1114
1385
# CheckerRunning - property
1115
1386
@dbus_service_property(_interface, signature="b",
1205
1480
if int(line.strip().split()[0]) > 1:
1206
1481
raise RuntimeError
1207
except (ValueError, IndexError, RuntimeError), error:
1482
except (ValueError, IndexError, RuntimeError) as error:
1208
1483
logger.error("Unknown protocol version: %s", error)
1211
1486
# Start GnuTLS connection
1213
1488
session.handshake()
1214
except gnutls.errors.GNUTLSError, error:
1489
except gnutls.errors.GNUTLSError as error:
1215
1490
logger.warning("Handshake failed: %s", error)
1216
1491
# Do not run session.bye() here: the session is not
1217
1492
# established. Just abandon the request.
1219
1494
logger.debug("Handshake succeeded")
1221
1496
approval_required = False
1224
1499
fpr = self.fingerprint(self.peer_certificate
1226
except (TypeError, gnutls.errors.GNUTLSError), error:
1502
gnutls.errors.GNUTLSError) as error:
1227
1503
logger.warning("Bad certificate: %s", error)
1229
1505
logger.debug("Fingerprint: %s", fpr)
1232
1508
client = ProxyClient(child_pipe, fpr,
1233
1509
self.client_address)
1234
1510
except KeyError:
1513
if self.server.use_dbus:
1515
client.NewRequest(str(self.client_address))
1237
1517
if client.approval_delay:
1238
1518
delay = client.approval_delay
1239
1519
client.approvals_pending += 1
1401
1686
This function creates a new pipe in self.pipe
1403
1688
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1405
super(MultiprocessingMixInWithPipe,
1406
self).process_request(request, client_address)
1690
proc = MultiprocessingMixIn.process_request(self, request,
1407
1692
self.child_pipe.close()
1408
self.add_pipe(parent_pipe)
1410
def add_pipe(self, parent_pipe):
1693
self.add_pipe(parent_pipe, proc)
1695
def add_pipe(self, parent_pipe, proc):
1411
1696
"""Dummy function; override as necessary"""
1697
raise NotImplementedError
1414
1700
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1415
1701
socketserver.TCPServer, object):
1500
1786
def server_activate(self):
1501
1787
if self.enabled:
1502
1788
return socketserver.TCPServer.server_activate(self)
1503
1790
def enable(self):
1504
1791
self.enabled = True
1505
def add_pipe(self, parent_pipe):
1793
def add_pipe(self, parent_pipe, proc):
1506
1794
# Call "handle_ipc" for both data and EOF events
1507
1795
gobject.io_add_watch(parent_pipe.fileno(),
1508
1796
gobject.IO_IN | gobject.IO_HUP,
1509
1797
functools.partial(self.handle_ipc,
1510
parent_pipe = parent_pipe))
1512
1802
def handle_ipc(self, source, condition, parent_pipe=None,
1513
client_object=None):
1803
proc = None, client_object=None):
1514
1804
condition_names = {
1515
1805
gobject.IO_IN: "IN", # There is data to read.
1516
1806
gobject.IO_OUT: "OUT", # Data can be written (without
1537
1829
fpr = request[1]
1538
1830
address = request[2]
1540
for c in self.clients:
1832
for c in self.clients.itervalues():
1541
1833
if c.fingerprint == fpr:
1545
logger.warning("Client not found for fingerprint: %s, ad"
1546
"dress: %s", fpr, address)
1837
logger.info("Client not found for fingerprint: %s, ad"
1838
"dress: %s", fpr, address)
1547
1839
if self.use_dbus:
1548
1840
# Emit D-Bus signal
1549
mandos_dbus_service.ClientNotFound(fpr, address[0])
1841
mandos_dbus_service.ClientNotFound(fpr,
1550
1843
parent_pipe.send(False)
1553
1846
gobject.io_add_watch(parent_pipe.fileno(),
1554
1847
gobject.IO_IN | gobject.IO_HUP,
1555
1848
functools.partial(self.handle_ipc,
1556
parent_pipe = parent_pipe,
1557
client_object = client))
1558
1854
parent_pipe.send(True)
1559
# remove the old hook in favor of the new above hook on same fileno
1855
# remove the old hook in favor of the new above hook on
1561
1858
if command == 'funcall':
1562
1859
funcname = request[1]
1563
1860
args = request[2]
1564
1861
kwargs = request[3]
1566
parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))
1863
parent_pipe.send(('data', getattr(client_object,
1568
1867
if command == 'getattr':
1569
1868
attrname = request[1]
1570
1869
if callable(client_object.__getattribute__(attrname)):
1571
1870
parent_pipe.send(('function',))
1573
parent_pipe.send(('data', client_object.__getattribute__(attrname)))
1872
parent_pipe.send(('data', client_object
1873
.__getattribute__(attrname)))
1575
1875
if command == 'setattr':
1576
1876
attrname = request[1]
1577
1877
value = request[2]
1578
1878
setattr(client_object, attrname, value)
1613
1913
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1615
1915
raise ValueError("Unknown suffix %r" % suffix)
1616
except (ValueError, IndexError), e:
1617
raise ValueError(e.message)
1916
except (ValueError, IndexError) as e:
1917
raise ValueError(*(e.args))
1618
1918
timevalue += delta
1619
1919
return timevalue
1622
def if_nametoindex(interface):
1623
"""Call the C function if_nametoindex(), or equivalent
1625
Note: This function cannot accept a unicode string."""
1626
global if_nametoindex
1628
if_nametoindex = (ctypes.cdll.LoadLibrary
1629
(ctypes.util.find_library("c"))
1631
except (OSError, AttributeError):
1632
logger.warning("Doing if_nametoindex the hard way")
1633
def if_nametoindex(interface):
1634
"Get an interface index the hard way, i.e. using fcntl()"
1635
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1636
with contextlib.closing(socket.socket()) as s:
1637
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1638
struct.pack(str("16s16x"),
1640
interface_index = struct.unpack(str("I"),
1642
return interface_index
1643
return if_nametoindex(interface)
1646
1922
def daemon(nochdir = False, noclose = False):
1647
1923
"""See daemon(3). Standard BSD Unix function.
1673
1949
##################################################################
1674
1950
# Parsing of options, both command line and config file
1676
parser = optparse.OptionParser(version = "%%prog %s" % version)
1677
parser.add_option("-i", "--interface", type="string",
1678
metavar="IF", help="Bind to interface IF")
1679
parser.add_option("-a", "--address", type="string",
1680
help="Address to listen for requests on")
1681
parser.add_option("-p", "--port", type="int",
1682
help="Port number to receive requests on")
1683
parser.add_option("--check", action="store_true",
1684
help="Run self-test")
1685
parser.add_option("--debug", action="store_true",
1686
help="Debug mode; run in foreground and log to"
1688
parser.add_option("--debuglevel", type="string", metavar="LEVEL",
1689
help="Debug level for stdout output")
1690
parser.add_option("--priority", type="string", help="GnuTLS"
1691
" priority string (see GnuTLS documentation)")
1692
parser.add_option("--servicename", type="string",
1693
metavar="NAME", help="Zeroconf service name")
1694
parser.add_option("--configdir", type="string",
1695
default="/etc/mandos", metavar="DIR",
1696
help="Directory to search for configuration"
1698
parser.add_option("--no-dbus", action="store_false",
1699
dest="use_dbus", help="Do not provide D-Bus"
1700
" system bus interface")
1701
parser.add_option("--no-ipv6", action="store_false",
1702
dest="use_ipv6", help="Do not use IPv6")
1703
options = parser.parse_args()[0]
1952
parser = argparse.ArgumentParser()
1953
parser.add_argument("-v", "--version", action="version",
1954
version = "%%(prog)s %s" % version,
1955
help="show version number and exit")
1956
parser.add_argument("-i", "--interface", metavar="IF",
1957
help="Bind to interface IF")
1958
parser.add_argument("-a", "--address",
1959
help="Address to listen for requests on")
1960
parser.add_argument("-p", "--port", type=int,
1961
help="Port number to receive requests on")
1962
parser.add_argument("--check", action="store_true",
1963
help="Run self-test")
1964
parser.add_argument("--debug", action="store_true",
1965
help="Debug mode; run in foreground and log"
1967
parser.add_argument("--debuglevel", metavar="LEVEL",
1968
help="Debug level for stdout output")
1969
parser.add_argument("--priority", help="GnuTLS"
1970
" priority string (see GnuTLS documentation)")
1971
parser.add_argument("--servicename",
1972
metavar="NAME", help="Zeroconf service name")
1973
parser.add_argument("--configdir",
1974
default="/etc/mandos", metavar="DIR",
1975
help="Directory to search for configuration"
1977
parser.add_argument("--no-dbus", action="store_false",
1978
dest="use_dbus", help="Do not provide D-Bus"
1979
" system bus interface")
1980
parser.add_argument("--no-ipv6", action="store_false",
1981
dest="use_ipv6", help="Do not use IPv6")
1982
parser.add_argument("--no-restore", action="store_false",
1983
dest="restore", help="Do not restore stored"
1985
parser.add_argument("--statedir", metavar="DIR",
1986
help="Directory to save/restore state in")
1988
options = parser.parse_args()
1705
1990
if options.check:
1861
2153
# End of Avahi example code
1864
bus_name = dbus.service.BusName("se.bsnet.fukt.Mandos",
2156
bus_name = dbus.service.BusName("se.recompile.Mandos",
1865
2157
bus, do_not_queue=True)
1866
except dbus.exceptions.NameExistsException, e:
2158
old_bus_name = (dbus.service.BusName
2159
("se.bsnet.fukt.Mandos", bus,
2161
except dbus.exceptions.NameExistsException as e:
1867
2162
logger.error(unicode(e) + ", disabling D-Bus")
1868
2163
use_dbus = False
1869
2164
server_settings["use_dbus"] = False
1870
2165
tcp_server.use_dbus = False
1871
2166
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1872
service = AvahiService(name = server_settings["servicename"],
1873
servicetype = "_mandos._tcp",
1874
protocol = protocol, bus = bus)
2167
service = AvahiServiceToSyslog(name =
2168
server_settings["servicename"],
2169
servicetype = "_mandos._tcp",
2170
protocol = protocol, bus = bus)
1875
2171
if server_settings["interface"]:
1876
2172
service.interface = (if_nametoindex
1877
2173
(str(server_settings["interface"])))
1882
2178
client_class = Client
1884
client_class = functools.partial(ClientDBus, bus = bus)
1885
def client_config_items(config, section):
1886
special_settings = {
1887
"approved_by_default":
1888
lambda: config.getboolean(section,
1889
"approved_by_default"),
1891
for name, value in config.items(section):
2180
client_class = functools.partial(ClientDBusTransitional,
2183
special_settings = {
2184
# Some settings need to be accessd by special methods;
2185
# booleans need .getboolean(), etc. Here is a list of them:
2186
"approved_by_default":
2188
client_config.getboolean(section, "approved_by_default"),
2191
client_config.getboolean(section, "enabled"),
2193
# Construct a new dict of client settings of this form:
2194
# { client_name: {setting_name: value, ...}, ...}
2195
# with exceptions for any special settings as defined above
2196
client_settings = dict((clientname,
2199
if setting not in special_settings
2200
else special_settings[setting]
2202
for setting, value in
2203
client_config.items(clientname)))
2204
for clientname in client_config.sections())
2206
old_client_settings = {}
2209
# Get client data and settings from last running state.
2210
if server_settings["restore"]:
2212
with open(stored_state_path, "rb") as stored_state:
2213
clients_data, old_client_settings = (pickle.load
2215
os.remove(stored_state_path)
2216
except IOError as e:
2217
logger.warning("Could not load persistent state: {0}"
2219
if e.errno != errno.ENOENT:
2222
with PGPEngine() as pgp:
2223
for client in clients_data:
2224
client_name = client["name"]
2226
# Decide which value to use after restoring saved state.
2227
# We have three different values: Old config file,
2228
# new config file, and saved state.
2229
# New config value takes precedence if it differs from old
2230
# config value, otherwise use saved state.
2231
for name, value in client_settings[client_name].items():
2233
# For each value in new config, check if it
2234
# differs from the old config value (Except for
2235
# the "secret" attribute)
2236
if (name != "secret" and
2237
value != old_client_settings[client_name]
2239
client[name] = value
2243
# Clients who has passed its expire date can still be
2244
# enabled if its last checker was sucessful. Clients
2245
# whose checker failed before we stored its state is
2246
# assumed to have failed all checkers during downtime.
2247
if client["enabled"]:
2248
if client["expires"] <= (datetime.datetime
2250
# Client has expired
2251
if client["last_checker_status"] != 0:
2252
client["enabled"] = False
2254
client["expires"] = (datetime.datetime
2256
+ client["timeout"])
2258
client["changedstate"] = (multiprocessing_manager
2260
(multiprocessing_manager
2263
new_client = (ClientDBusTransitional.__new__
2264
(ClientDBusTransitional))
2265
tcp_server.clients[client_name] = new_client
2266
new_client.bus = bus
2267
for name, value in client.iteritems():
2268
setattr(new_client, name, value)
2269
client_object_name = unicode(client_name).translate(
2270
{ord("."): ord("_"),
2271
ord("-"): ord("_")})
2272
new_client.dbus_object_path = (dbus.ObjectPath
2274
+ client_object_name))
2275
DBusObjectWithProperties.__init__(new_client,
2280
tcp_server.clients[client_name] = (Client.__new__
2282
for name, value in client.iteritems():
2283
setattr(tcp_server.clients[client_name],
1893
yield (name, special_settings[name]())
1897
tcp_server.clients.update(set(
1898
client_class(name = section,
1899
config= dict(client_config_items(
1900
client_config, section)))
1901
for section in client_config.sections()))
2287
tcp_server.clients[client_name].secret = (
2288
pgp.decrypt(tcp_server.clients[client_name]
2290
client_settings[client_name]
2293
# If decryption fails, we use secret from new settings
2294
logger.debug("Failed to decrypt {0} old secret"
2295
.format(client_name))
2296
tcp_server.clients[client_name].secret = (
2297
client_settings[client_name]["secret"])
2299
# Create/remove clients based on new changes made to config
2300
for clientname in set(old_client_settings) - set(client_settings):
2301
del tcp_server.clients[clientname]
2302
for clientname in set(client_settings) - set(old_client_settings):
2303
tcp_server.clients[clientname] = (client_class(name
1902
2309
if not tcp_server.clients:
1903
2310
logger.warning("No clients defined")
1977
mandos_dbus_service = MandosDBusService()
2385
class MandosDBusServiceTransitional(MandosDBusService):
2386
__metaclass__ = AlternateDBusNamesMetaclass
2387
mandos_dbus_service = MandosDBusServiceTransitional()
1980
2390
"Cleanup function; run on exit"
1981
2391
service.cleanup()
2393
multiprocessing.active_children()
2394
if not (tcp_server.clients or client_settings):
2397
# Store client before exiting. Secrets are encrypted with key
2398
# based on what config file has. If config file is
2399
# removed/edited, old secret will thus be unrecovable.
2401
with PGPEngine() as pgp:
2402
for client in tcp_server.clients.itervalues():
2403
key = client_settings[client.name]["secret"]
2404
client.encrypted_secret = pgp.encrypt(client.secret,
2408
# A list of attributes that will not be stored when
2410
exclude = set(("bus", "changedstate", "secret"))
2411
for name, typ in (inspect.getmembers
2412
(dbus.service.Object)):
2415
client_dict["encrypted_secret"] = (client
2417
for attr in client.client_structure:
2418
if attr not in exclude:
2419
client_dict[attr] = getattr(client, attr)
2421
clients.append(client_dict)
2422
del client_settings[client.name]["secret"]
2425
with os.fdopen(os.open(stored_state_path,
2426
os.O_CREAT|os.O_WRONLY|os.O_TRUNC,
2427
0600), "wb") as stored_state:
2428
pickle.dump((clients, client_settings), stored_state)
2429
except (IOError, OSError) as e:
2430
logger.warning("Could not save persistent state: {0}"
2432
if e.errno not in (errno.ENOENT, errno.EACCES):
2435
# Delete all clients, and settings from config
1983
2436
while tcp_server.clients:
1984
client = tcp_server.clients.pop()
2437
name, client = tcp_server.clients.popitem()
1986
2439
client.remove_from_connection()
1987
client.disable_hook = None
1988
2440
# Don't signal anything except ClientRemoved
1989
2441
client.disable(quiet=True)
1991
2443
# Emit D-Bus signal
1992
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
2444
mandos_dbus_service.ClientRemoved(client
2447
client_settings.clear()
1995
2449
atexit.register(cleanup)
1997
for client in tcp_server.clients:
2451
for client in tcp_server.clients.itervalues():
1999
2453
# Emit D-Bus signal
2000
2454
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2455
# Need to initiate checking of clients
2457
client.init_checker()
2003
2459
tcp_server.enable()
2004
2460
tcp_server.server_activate()