241
195
def decrypt(self, data, password):
242
196
passphrase = self.password_encode(password)
243
with tempfile.NamedTemporaryFile(
244
dir = self.tempdir) as passfile:
197
with tempfile.NamedTemporaryFile(dir = self.tempdir
245
199
passfile.write(passphrase)
247
proc = subprocess.Popen([self.gpg, '--decrypt',
201
proc = subprocess.Popen(['gpg', '--decrypt',
248
202
'--passphrase-file',
250
204
+ self.gnupgargs,
251
205
stdin = subprocess.PIPE,
252
206
stdout = subprocess.PIPE,
253
207
stderr = subprocess.PIPE)
254
decrypted_plaintext, err = proc.communicate(input = data)
208
decrypted_plaintext, err = proc.communicate(input
255
210
if proc.returncode != 0:
256
211
raise PGPError(err)
257
212
return decrypted_plaintext
259
# Pretend that we have an Avahi module
261
"""This isn't so much a class as it is a module-like namespace.
262
It is instantiated once, and simulates having an Avahi module."""
263
IF_UNSPEC = -1 # avahi-common/address.h
264
PROTO_UNSPEC = -1 # avahi-common/address.h
265
PROTO_INET = 0 # avahi-common/address.h
266
PROTO_INET6 = 1 # avahi-common/address.h
267
DBUS_NAME = "org.freedesktop.Avahi"
268
DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"
269
DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"
270
DBUS_PATH_SERVER = "/"
271
def string_array_to_txt_array(self, t):
272
return dbus.Array((dbus.ByteArray(s.encode("utf-8"))
273
for s in t), signature="ay")
274
ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h
275
ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h
276
ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h
277
SERVER_INVALID = 0 # avahi-common/defs.h
278
SERVER_REGISTERING = 1 # avahi-common/defs.h
279
SERVER_RUNNING = 2 # avahi-common/defs.h
280
SERVER_COLLISION = 3 # avahi-common/defs.h
281
SERVER_FAILURE = 4 # avahi-common/defs.h
284
215
class AvahiError(Exception):
285
216
def __init__(self, value, *args, **kwargs):
286
217
self.value = value
287
return super(AvahiError, self).__init__(value, *args,
218
super(AvahiError, self).__init__(value, *args, **kwargs)
219
def __unicode__(self):
220
return unicode(repr(self.value))
291
222
class AvahiServiceError(AvahiError):
295
225
class AvahiGroupError(AvahiError):
469
377
follow_name_owner_changes=True),
470
378
avahi.DBUS_INTERFACE_SERVER)
471
379
self.server.connect_to_signal("StateChanged",
472
self.server_state_changed)
380
self.server_state_changed)
473
381
self.server_state_changed(self.server.GetState())
476
384
class AvahiServiceToSyslog(AvahiService):
477
def rename(self, *args, **kwargs):
478
386
"""Add the new name to the syslog messages"""
479
ret = AvahiService.rename(self, *args, **kwargs)
480
syslogger.setFormatter(logging.Formatter(
481
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
387
ret = AvahiService.rename(self)
388
syslogger.setFormatter(logging.Formatter
389
('Mandos ({0}) [%(process)d]:'
390
' %(levelname)s: %(message)s'
485
# Pretend that we have a GnuTLS module
486
class GnuTLS(object):
487
"""This isn't so much a class as it is a module-like namespace.
488
It is instantiated once, and simulates having a GnuTLS module."""
490
_library = ctypes.cdll.LoadLibrary(
491
ctypes.util.find_library("gnutls"))
492
_need_version = b"3.3.0"
494
# Need to use class name "GnuTLS" here, since this method is
495
# called before the assignment to the "gnutls" global variable
497
if GnuTLS.check_version(self._need_version) is None:
498
raise GnuTLS.Error("Needs GnuTLS {} or later"
499
.format(self._need_version))
501
# Unless otherwise indicated, the constants and types below are
502
# all from the gnutls/gnutls.h C header file.
512
E_NO_CERTIFICATE_FOUND = -49
513
OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
516
class session_int(ctypes.Structure):
518
session_t = ctypes.POINTER(session_int)
519
class certificate_credentials_st(ctypes.Structure):
521
certificate_credentials_t = ctypes.POINTER(
522
certificate_credentials_st)
523
certificate_type_t = ctypes.c_int
524
class datum_t(ctypes.Structure):
525
_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
526
('size', ctypes.c_uint)]
527
class openpgp_crt_int(ctypes.Structure):
529
openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
530
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
531
log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
532
credentials_type_t = ctypes.c_int
533
transport_ptr_t = ctypes.c_void_p
534
close_request_t = ctypes.c_int
537
class Error(Exception):
538
# We need to use the class name "GnuTLS" here, since this
539
# exception might be raised from within GnuTLS.__init__,
540
# which is called before the assignment to the "gnutls"
541
# global variable has happened.
542
def __init__(self, message = None, code = None, args=()):
543
# Default usage is by a message string, but if a return
544
# code is passed, convert it to a string with
547
if message is None and code is not None:
548
message = GnuTLS.strerror(code)
549
return super(GnuTLS.Error, self).__init__(
552
class CertificateSecurityError(Error):
556
class Credentials(object):
558
self._c_object = gnutls.certificate_credentials_t()
559
gnutls.certificate_allocate_credentials(
560
ctypes.byref(self._c_object))
561
self.type = gnutls.CRD_CERTIFICATE
564
gnutls.certificate_free_credentials(self._c_object)
566
class ClientSession(object):
567
def __init__(self, socket, credentials = None):
568
self._c_object = gnutls.session_t()
569
gnutls.init(ctypes.byref(self._c_object), gnutls.CLIENT)
570
gnutls.set_default_priority(self._c_object)
571
gnutls.transport_set_ptr(self._c_object, socket.fileno())
572
gnutls.handshake_set_private_extensions(self._c_object,
575
if credentials is None:
576
credentials = gnutls.Credentials()
577
gnutls.credentials_set(self._c_object, credentials.type,
578
ctypes.cast(credentials._c_object,
580
self.credentials = credentials
583
gnutls.deinit(self._c_object)
586
return gnutls.handshake(self._c_object)
588
def send(self, data):
592
data_len -= gnutls.record_send(self._c_object,
597
return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
599
# Error handling functions
600
def _error_code(result):
601
"""A function to raise exceptions on errors, suitable
602
for the 'restype' attribute on ctypes functions"""
605
if result == gnutls.E_NO_CERTIFICATE_FOUND:
606
raise gnutls.CertificateSecurityError(code = result)
607
raise gnutls.Error(code = result)
609
def _retry_on_error(result, func, arguments):
610
"""A function to retry on some errors, suitable
611
for the 'errcheck' attribute on ctypes functions"""
613
if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
614
return _error_code(result)
615
result = func(*arguments)
618
# Unless otherwise indicated, the function declarations below are
619
# all from the gnutls/gnutls.h C header file.
622
priority_set_direct = _library.gnutls_priority_set_direct
623
priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
624
ctypes.POINTER(ctypes.c_char_p)]
625
priority_set_direct.restype = _error_code
627
init = _library.gnutls_init
628
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
629
init.restype = _error_code
631
set_default_priority = _library.gnutls_set_default_priority
632
set_default_priority.argtypes = [session_t]
633
set_default_priority.restype = _error_code
635
record_send = _library.gnutls_record_send
636
record_send.argtypes = [session_t, ctypes.c_void_p,
638
record_send.restype = ctypes.c_ssize_t
639
record_send.errcheck = _retry_on_error
641
certificate_allocate_credentials = (
642
_library.gnutls_certificate_allocate_credentials)
643
certificate_allocate_credentials.argtypes = [
644
ctypes.POINTER(certificate_credentials_t)]
645
certificate_allocate_credentials.restype = _error_code
647
certificate_free_credentials = (
648
_library.gnutls_certificate_free_credentials)
649
certificate_free_credentials.argtypes = [certificate_credentials_t]
650
certificate_free_credentials.restype = None
652
handshake_set_private_extensions = (
653
_library.gnutls_handshake_set_private_extensions)
654
handshake_set_private_extensions.argtypes = [session_t,
656
handshake_set_private_extensions.restype = None
658
credentials_set = _library.gnutls_credentials_set
659
credentials_set.argtypes = [session_t, credentials_type_t,
661
credentials_set.restype = _error_code
663
strerror = _library.gnutls_strerror
664
strerror.argtypes = [ctypes.c_int]
665
strerror.restype = ctypes.c_char_p
667
certificate_type_get = _library.gnutls_certificate_type_get
668
certificate_type_get.argtypes = [session_t]
669
certificate_type_get.restype = _error_code
671
certificate_get_peers = _library.gnutls_certificate_get_peers
672
certificate_get_peers.argtypes = [session_t,
673
ctypes.POINTER(ctypes.c_uint)]
674
certificate_get_peers.restype = ctypes.POINTER(datum_t)
676
global_set_log_level = _library.gnutls_global_set_log_level
677
global_set_log_level.argtypes = [ctypes.c_int]
678
global_set_log_level.restype = None
680
global_set_log_function = _library.gnutls_global_set_log_function
681
global_set_log_function.argtypes = [log_func]
682
global_set_log_function.restype = None
684
deinit = _library.gnutls_deinit
685
deinit.argtypes = [session_t]
686
deinit.restype = None
688
handshake = _library.gnutls_handshake
689
handshake.argtypes = [session_t]
690
handshake.restype = _error_code
691
handshake.errcheck = _retry_on_error
693
transport_set_ptr = _library.gnutls_transport_set_ptr
694
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
695
transport_set_ptr.restype = None
697
bye = _library.gnutls_bye
698
bye.argtypes = [session_t, close_request_t]
699
bye.restype = _error_code
700
bye.errcheck = _retry_on_error
702
check_version = _library.gnutls_check_version
703
check_version.argtypes = [ctypes.c_char_p]
704
check_version.restype = ctypes.c_char_p
706
# All the function declarations below are from gnutls/openpgp.h
708
openpgp_crt_init = _library.gnutls_openpgp_crt_init
709
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
710
openpgp_crt_init.restype = _error_code
712
openpgp_crt_import = _library.gnutls_openpgp_crt_import
713
openpgp_crt_import.argtypes = [openpgp_crt_t,
714
ctypes.POINTER(datum_t),
716
openpgp_crt_import.restype = _error_code
718
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
719
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
720
ctypes.POINTER(ctypes.c_uint)]
721
openpgp_crt_verify_self.restype = _error_code
723
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
724
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
725
openpgp_crt_deinit.restype = None
727
openpgp_crt_get_fingerprint = (
728
_library.gnutls_openpgp_crt_get_fingerprint)
729
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
733
openpgp_crt_get_fingerprint.restype = _error_code
735
# Remove non-public functions
736
del _error_code, _retry_on_error
737
# Create the global "gnutls" object, simulating a module
740
def call_pipe(connection, # : multiprocessing.Connection
741
func, *args, **kwargs):
742
"""This function is meant to be called by multiprocessing.Process
744
This function runs func(*args, **kwargs), and writes the resulting
745
return value on the provided multiprocessing.Connection.
747
connection.send(func(*args, **kwargs))
395
def timedelta_to_milliseconds(td):
396
"Convert a datetime.timedelta() to milliseconds"
397
return ((td.days * 24 * 60 * 60 * 1000)
398
+ (td.seconds * 1000)
399
+ (td.microseconds // 1000))
750
402
class Client(object):
751
403
"""A representation of a client host served by this server.
949
614
# Schedule a new checker to be started an 'interval' from now,
950
615
# and every interval from then on.
951
616
if self.checker_initiator_tag is not None:
952
GObject.source_remove(self.checker_initiator_tag)
953
self.checker_initiator_tag = GObject.timeout_add(
954
int(self.interval.total_seconds() * 1000),
617
gobject.source_remove(self.checker_initiator_tag)
618
self.checker_initiator_tag = (gobject.timeout_add
619
(self.interval_milliseconds(),
956
621
# Schedule a disable() when 'timeout' has passed
957
622
if self.disable_initiator_tag is not None:
958
GObject.source_remove(self.disable_initiator_tag)
959
self.disable_initiator_tag = GObject.timeout_add(
960
int(self.timeout.total_seconds() * 1000), self.disable)
623
gobject.source_remove(self.disable_initiator_tag)
624
self.disable_initiator_tag = (gobject.timeout_add
625
(self.timeout_milliseconds(),
961
627
# Also start a new checker *right now*.
962
628
self.start_checker()
964
def checker_callback(self, source, condition, connection,
630
def checker_callback(self, pid, condition, command):
966
631
"""The checker has completed, so take appropriate actions."""
967
632
self.checker_callback_tag = None
968
633
self.checker = None
969
# Read return code from connection (see call_pipe)
970
returncode = connection.recv()
974
self.last_checker_status = returncode
975
self.last_checker_signal = None
634
if os.WIFEXITED(condition):
635
self.last_checker_status = os.WEXITSTATUS(condition)
976
636
if self.last_checker_status == 0:
977
637
logger.info("Checker for %(name)s succeeded",
979
639
self.checked_ok()
981
logger.info("Checker for %(name)s failed", vars(self))
641
logger.info("Checker for %(name)s failed",
983
644
self.last_checker_status = -1
984
self.last_checker_signal = -returncode
985
645
logger.warning("Checker for %(name)s crashed?",
989
648
def checked_ok(self):
990
649
"""Assert that the client has been seen, alive and well."""
991
650
self.last_checked_ok = datetime.datetime.utcnow()
992
651
self.last_checker_status = 0
993
self.last_checker_signal = None
994
652
self.bump_timeout()
996
654
def bump_timeout(self, timeout=None):
1022
681
# than 'timeout' for the client to be disabled, which is as it
1025
if self.checker is not None and not self.checker.is_alive():
1026
logger.warning("Checker was not alive; joining")
684
# If a checker exists, make sure it is not a zombie
686
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
687
except (AttributeError, OSError) as error:
688
if (isinstance(error, OSError)
689
and error.errno != errno.ECHILD):
693
logger.warning("Checker was a zombie")
694
gobject.source_remove(self.checker_callback_tag)
695
self.checker_callback(pid, status,
696
self.current_checker_command)
1029
697
# Start a new checker if needed
1030
698
if self.checker is None:
1031
699
# Escape attributes for the shell
1033
attr: re.escape(str(getattr(self, attr)))
1034
for attr in self.runtime_expansions }
700
escaped_attrs = dict(
701
(attr, re.escape(unicode(getattr(self, attr))))
703
self.runtime_expansions)
1036
705
command = self.checker_command % escaped_attrs
1037
706
except TypeError as error:
1038
707
logger.error('Could not format string "%s"',
1039
self.checker_command,
708
self.checker_command, exc_info=error)
709
return True # Try again later
710
self.current_checker_command = command
712
logger.info("Starting checker %r for %s",
714
# We don't need to redirect stdout and stderr, since
715
# in normal mode, that is already done by daemon(),
716
# and in debug mode we don't want to. (Stdin is
717
# always replaced by /dev/null.)
718
# The exception is when not debugging but nevertheless
719
# running in the foreground; use the previously
722
if (not self.server_settings["debug"]
723
and self.server_settings["foreground"]):
724
popen_args.update({"stdout": wnull,
726
self.checker = subprocess.Popen(command,
730
except OSError as error:
731
logger.error("Failed to start subprocess",
1041
return True # Try again later
1042
self.current_checker_command = command
1043
logger.info("Starting checker %r for %s", command,
1045
# We don't need to redirect stdout and stderr, since
1046
# in normal mode, that is already done by daemon(),
1047
# and in debug mode we don't want to. (Stdin is
1048
# always replaced by /dev/null.)
1049
# The exception is when not debugging but nevertheless
1050
# running in the foreground; use the previously
1052
popen_args = { "close_fds": True,
1055
if (not self.server_settings["debug"]
1056
and self.server_settings["foreground"]):
1057
popen_args.update({"stdout": wnull,
1059
pipe = multiprocessing.Pipe(duplex = False)
1060
self.checker = multiprocessing.Process(
1062
args = (pipe[1], subprocess.call, command),
1063
kwargs = popen_args)
1064
self.checker.start()
1065
self.checker_callback_tag = GObject.io_add_watch(
1066
pipe[0].fileno(), GObject.IO_IN,
1067
self.checker_callback, pipe[0], command)
1068
# Re-run this periodically if run by GObject.timeout_add
734
self.checker_callback_tag = (gobject.child_watch_add
736
self.checker_callback,
738
# The checker may have completed before the gobject
739
# watch was added. Check for this.
741
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
742
except OSError as error:
743
if error.errno == errno.ECHILD:
744
# This should never happen
745
logger.error("Child process vanished",
750
gobject.source_remove(self.checker_callback_tag)
751
self.checker_callback(pid, status, command)
752
# Re-run this periodically if run by gobject.timeout_add
1071
755
def stop_checker(self):
1072
756
"""Force the checker process, if any, to stop."""
1073
757
if self.checker_callback_tag:
1074
GObject.source_remove(self.checker_callback_tag)
758
gobject.source_remove(self.checker_callback_tag)
1075
759
self.checker_callback_tag = None
1076
760
if getattr(self, "checker", None) is None:
1078
762
logger.debug("Stopping checker for %(name)s", vars(self))
1079
self.checker.terminate()
764
self.checker.terminate()
766
#if self.checker.poll() is None:
767
# self.checker.kill()
768
except OSError as error:
769
if error.errno != errno.ESRCH: # No such process
1080
771
self.checker = None
1083
def dbus_service_property(dbus_interface,
774
def dbus_service_property(dbus_interface, signature="v",
775
access="readwrite", byte_arrays=False):
1087
776
"""Decorators for marking methods of a DBusObjectWithProperties to
1088
777
become properties on the D-Bus.
1189
872
If called like _is_dbus_thing("method") it returns a function
1190
873
suitable for use as predicate to inspect.getmembers().
1192
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
875
return lambda obj: getattr(obj, "_dbus_is_{0}".format(thing),
1195
878
def _get_all_dbus_things(self, thing):
1196
879
"""Returns a generator of (name, attribute) pairs
1198
return ((getattr(athing.__get__(self), "_dbus_name", name),
881
return ((getattr(athing.__get__(self), "_dbus_name",
1199
883
athing.__get__(self))
1200
884
for cls in self.__class__.__mro__
1201
885
for name, athing in
1202
inspect.getmembers(cls, self._is_dbus_thing(thing)))
1204
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1205
out_signature = "s",
1206
path_keyword = 'object_path',
1207
connection_keyword = 'connection')
1208
def Introspect(self, object_path, connection):
1209
"""Overloading of standard D-Bus method.
1211
Inserts annotation tags on methods and signals.
1213
xmlstring = dbus.service.Object.Introspect(self, object_path,
1216
document = xml.dom.minidom.parseString(xmlstring)
1218
for if_tag in document.getElementsByTagName("interface"):
1219
# Add annotation tags
1220
for typ in ("method", "signal"):
1221
for tag in if_tag.getElementsByTagName(typ):
1223
for name, prop in (self.
1224
_get_all_dbus_things(typ)):
1225
if (name == tag.getAttribute("name")
1226
and prop._dbus_interface
1227
== if_tag.getAttribute("name")):
1228
annots.update(getattr(
1229
prop, "_dbus_annotations", {}))
1230
for name, value in annots.items():
1231
ann_tag = document.createElement(
1233
ann_tag.setAttribute("name", name)
1234
ann_tag.setAttribute("value", value)
1235
tag.appendChild(ann_tag)
1236
# Add interface annotation tags
1237
for annotation, value in dict(
1238
itertools.chain.from_iterable(
1239
annotations().items()
1240
for name, annotations
1241
in self._get_all_dbus_things("interface")
1242
if name == if_tag.getAttribute("name")
1244
ann_tag = document.createElement("annotation")
1245
ann_tag.setAttribute("name", annotation)
1246
ann_tag.setAttribute("value", value)
1247
if_tag.appendChild(ann_tag)
1248
# Fix argument name for the Introspect method itself
1249
if (if_tag.getAttribute("name")
1250
== dbus.INTROSPECTABLE_IFACE):
1251
for cn in if_tag.getElementsByTagName("method"):
1252
if cn.getAttribute("name") == "Introspect":
1253
for arg in cn.getElementsByTagName("arg"):
1254
if (arg.getAttribute("direction")
1256
arg.setAttribute("name",
1258
xmlstring = document.toxml("utf-8")
1260
except (AttributeError, xml.dom.DOMException,
1261
xml.parsers.expat.ExpatError) as error:
1262
logger.error("Failed to override Introspection method",
1267
class DBusObjectWithProperties(DBusObjectWithAnnotations):
1268
"""A D-Bus object with properties.
1270
Classes inheriting from this can use the dbus_service_property
1271
decorator to expose methods as D-Bus properties. It exposes the
1272
standard Get(), Set(), and GetAll() methods on the D-Bus.
886
inspect.getmembers(cls,
887
self._is_dbus_thing(thing)))
1275
889
def _get_dbus_property(self, interface_name, property_name):
1276
890
"""Returns a bound method if one exists which is a D-Bus
1277
891
property with the specified name and interface.
1279
for cls in self.__class__.__mro__:
1280
for name, value in inspect.getmembers(
1281
cls, self._is_dbus_thing("property")):
893
for cls in self.__class__.__mro__:
894
for name, value in (inspect.getmembers
896
self._is_dbus_thing("property"))):
1282
897
if (value._dbus_name == property_name
1283
898
and value._dbus_interface == interface_name):
1284
899
return value.__get__(self)
1286
901
# No such property
1287
raise DBusPropertyNotFound("{}:{}.{}".format(
1288
self.dbus_object_path, interface_name, property_name))
1291
def _get_all_interface_names(cls):
1292
"""Get a sequence of all interfaces supported by an object"""
1293
return (name for name in set(getattr(getattr(x, attr),
1294
"_dbus_interface", None)
1295
for x in (inspect.getmro(cls))
1297
if name is not None)
1299
@dbus.service.method(dbus.PROPERTIES_IFACE,
902
raise DBusPropertyNotFound(self.dbus_object_path + ":"
903
+ interface_name + "."
906
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
1301
907
out_signature="v")
1302
908
def Get(self, interface_name, property_name):
1303
909
"""Standard D-Bus property Get() method, see D-Bus standard.
1431
1038
exc_info=error)
1432
1039
return xmlstring
1435
dbus.OBJECT_MANAGER_IFACE
1436
except AttributeError:
1437
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1439
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1440
"""A D-Bus object with an ObjectManager.
1442
Classes inheriting from this exposes the standard
1443
GetManagedObjects call and the InterfacesAdded and
1444
InterfacesRemoved signals on the standard
1445
"org.freedesktop.DBus.ObjectManager" interface.
1447
Note: No signals are sent automatically; they must be sent
1450
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1451
out_signature = "a{oa{sa{sv}}}")
1452
def GetManagedObjects(self):
1453
"""This function must be overridden"""
1454
raise NotImplementedError()
1456
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1457
signature = "oa{sa{sv}}")
1458
def InterfacesAdded(self, object_path, interfaces_and_properties):
1461
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature = "oas")
1462
def InterfacesRemoved(self, object_path, interfaces):
1465
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1466
out_signature = "s",
1467
path_keyword = 'object_path',
1468
connection_keyword = 'connection')
1469
def Introspect(self, object_path, connection):
1470
"""Overloading of standard D-Bus method.
1472
Override return argument name of GetManagedObjects to be
1473
"objpath_interfaces_and_properties"
1475
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1479
document = xml.dom.minidom.parseString(xmlstring)
1481
for if_tag in document.getElementsByTagName("interface"):
1482
# Fix argument name for the GetManagedObjects method
1483
if (if_tag.getAttribute("name")
1484
== dbus.OBJECT_MANAGER_IFACE):
1485
for cn in if_tag.getElementsByTagName("method"):
1486
if (cn.getAttribute("name")
1487
== "GetManagedObjects"):
1488
for arg in cn.getElementsByTagName("arg"):
1489
if (arg.getAttribute("direction")
1493
"objpath_interfaces"
1495
xmlstring = document.toxml("utf-8")
1497
except (AttributeError, xml.dom.DOMException,
1498
xml.parsers.expat.ExpatError) as error:
1499
logger.error("Failed to override Introspection method",
1503
1042
def datetime_to_dbus(dt, variant_level=0):
1504
1043
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1506
1045
return dbus.String("", variant_level = variant_level)
1507
return dbus.String(dt.isoformat(), variant_level=variant_level)
1046
return dbus.String(dt.isoformat(),
1047
variant_level=variant_level)
1510
1050
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1541
1080
# Ignore non-D-Bus attributes, and D-Bus attributes
1542
1081
# with the wrong interface name
1543
1082
if (not hasattr(attribute, "_dbus_interface")
1544
or not attribute._dbus_interface.startswith(
1545
orig_interface_name)):
1083
or not attribute._dbus_interface
1084
.startswith(orig_interface_name)):
1547
1086
# Create an alternate D-Bus interface name based on
1548
1087
# the current name
1549
alt_interface = attribute._dbus_interface.replace(
1550
orig_interface_name, alt_interface_name)
1088
alt_interface = (attribute._dbus_interface
1089
.replace(orig_interface_name,
1090
alt_interface_name))
1551
1091
interface_names.add(alt_interface)
1552
1092
# Is this a D-Bus signal?
1553
1093
if getattr(attribute, "_dbus_is_signal", False):
1554
1094
# Extract the original non-method undecorated
1555
1095
# function by black magic
1556
if sys.version_info.major == 2:
1557
nonmethod_func = (dict(
1096
nonmethod_func = (dict(
1558
1097
zip(attribute.func_code.co_freevars,
1559
attribute.__closure__))
1560
["func"].cell_contents)
1562
nonmethod_func = (dict(
1563
zip(attribute.__code__.co_freevars,
1564
attribute.__closure__))
1565
["func"].cell_contents)
1098
attribute.__closure__))["func"]
1566
1100
# Create a new, but exactly alike, function
1567
1101
# object, and decorate it to be a new D-Bus signal
1568
1102
# with the alternate D-Bus interface name
1569
new_function = copy_function(nonmethod_func)
1570
new_function = (dbus.service.signal(
1572
attribute._dbus_signature)(new_function))
1103
new_function = (dbus.service.signal
1105
attribute._dbus_signature)
1106
(types.FunctionType(
1107
nonmethod_func.func_code,
1108
nonmethod_func.func_globals,
1109
nonmethod_func.func_name,
1110
nonmethod_func.func_defaults,
1111
nonmethod_func.func_closure)))
1573
1112
# Copy annotations, if any
1575
new_function._dbus_annotations = dict(
1576
attribute._dbus_annotations)
1114
new_function._dbus_annotations = (
1115
dict(attribute._dbus_annotations))
1577
1116
except AttributeError:
1579
1118
# Define a creator of a function to call both the
1794
1321
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1795
1322
Client.__del__(self, *args, **kwargs)
1797
def checker_callback(self, source, condition,
1798
connection, command, *args, **kwargs):
1799
ret = Client.checker_callback(self, source, condition,
1800
connection, command, *args,
1802
exitstatus = self.last_checker_status
1324
def checker_callback(self, pid, condition, command,
1326
self.checker_callback_tag = None
1328
if os.WIFEXITED(condition):
1329
exitstatus = os.WEXITSTATUS(condition)
1804
1330
# Emit D-Bus signal
1805
1331
self.CheckerCompleted(dbus.Int16(exitstatus),
1806
# This is specific to GNU libC
1807
dbus.Int64(exitstatus << 8),
1332
dbus.Int64(condition),
1808
1333
dbus.String(command))
1810
1335
# Emit D-Bus signal
1811
1336
self.CheckerCompleted(dbus.Int16(-1),
1813
# This is specific to GNU libC
1815
| self.last_checker_signal),
1337
dbus.Int64(condition),
1816
1338
dbus.String(command))
1340
return Client.checker_callback(self, pid, condition, command,
1819
1343
def start_checker(self, *args, **kwargs):
1820
old_checker_pid = getattr(self.checker, "pid", None)
1344
old_checker = self.checker
1345
if self.checker is not None:
1346
old_checker_pid = self.checker.pid
1348
old_checker_pid = None
1821
1349
r = Client.start_checker(self, *args, **kwargs)
1822
1350
# Only if new checker process was started
1823
1351
if (self.checker is not None
1938
1467
self.approved_by_default = bool(value)
1940
1469
# ApprovalDelay - property
1941
@dbus_service_property(_interface,
1470
@dbus_service_property(_interface, signature="t",
1943
1471
access="readwrite")
1944
1472
def ApprovalDelay_dbus_property(self, value=None):
1945
1473
if value is None: # get
1946
return dbus.UInt64(self.approval_delay.total_seconds()
1474
return dbus.UInt64(self.approval_delay_milliseconds())
1948
1475
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1950
1477
# ApprovalDuration - property
1951
@dbus_service_property(_interface,
1478
@dbus_service_property(_interface, signature="t",
1953
1479
access="readwrite")
1954
1480
def ApprovalDuration_dbus_property(self, value=None):
1955
1481
if value is None: # get
1956
return dbus.UInt64(self.approval_duration.total_seconds()
1482
return dbus.UInt64(timedelta_to_milliseconds(
1483
self.approval_duration))
1958
1484
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1960
1486
# Name - property
1962
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1963
1487
@dbus_service_property(_interface, signature="s", access="read")
1964
1488
def Name_dbus_property(self):
1965
1489
return dbus.String(self.name)
1967
1491
# Fingerprint - property
1969
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1970
1492
@dbus_service_property(_interface, signature="s", access="read")
1971
1493
def Fingerprint_dbus_property(self):
1972
1494
return dbus.String(self.fingerprint)
1974
1496
# Host - property
1975
@dbus_service_property(_interface,
1497
@dbus_service_property(_interface, signature="s",
1977
1498
access="readwrite")
1978
1499
def Host_dbus_property(self, value=None):
1979
1500
if value is None: # get
1980
1501
return dbus.String(self.host)
1981
self.host = str(value)
1502
self.host = unicode(value)
1983
1504
# Created - property
1985
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1986
1505
@dbus_service_property(_interface, signature="s", access="read")
1987
1506
def Created_dbus_property(self):
1988
1507
return datetime_to_dbus(self.created)
2049
1566
if (getattr(self, "disable_initiator_tag", None)
2052
GObject.source_remove(self.disable_initiator_tag)
2053
self.disable_initiator_tag = GObject.timeout_add(
2054
int((self.expires - now).total_seconds() * 1000),
1569
gobject.source_remove(self.disable_initiator_tag)
1570
self.disable_initiator_tag = (
1571
gobject.timeout_add(
1572
timedelta_to_milliseconds(self.expires - now),
2057
1575
# ExtendedTimeout - property
2058
@dbus_service_property(_interface,
1576
@dbus_service_property(_interface, signature="t",
2060
1577
access="readwrite")
2061
1578
def ExtendedTimeout_dbus_property(self, value=None):
2062
1579
if value is None: # get
2063
return dbus.UInt64(self.extended_timeout.total_seconds()
1580
return dbus.UInt64(self.extended_timeout_milliseconds())
2065
1581
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
2067
1583
# Interval - property
2068
@dbus_service_property(_interface,
1584
@dbus_service_property(_interface, signature="t",
2070
1585
access="readwrite")
2071
1586
def Interval_dbus_property(self, value=None):
2072
1587
if value is None: # get
2073
return dbus.UInt64(self.interval.total_seconds() * 1000)
1588
return dbus.UInt64(self.interval_milliseconds())
2074
1589
self.interval = datetime.timedelta(0, 0, 0, value)
2075
1590
if getattr(self, "checker_initiator_tag", None) is None:
2077
1592
if self.enabled:
2078
1593
# Reschedule checker run
2079
GObject.source_remove(self.checker_initiator_tag)
2080
self.checker_initiator_tag = GObject.timeout_add(
2081
value, self.start_checker)
2082
self.start_checker() # Start one now, too
1594
gobject.source_remove(self.checker_initiator_tag)
1595
self.checker_initiator_tag = (gobject.timeout_add
1596
(value, self.start_checker))
1597
self.start_checker() # Start one now, too
2084
1599
# Checker - property
2085
@dbus_service_property(_interface,
1600
@dbus_service_property(_interface, signature="s",
2087
1601
access="readwrite")
2088
1602
def Checker_dbus_property(self, value=None):
2089
1603
if value is None: # get
2090
1604
return dbus.String(self.checker_command)
2091
self.checker_command = str(value)
1605
self.checker_command = unicode(value)
2093
1607
# CheckerRunning - property
2094
@dbus_service_property(_interface,
1608
@dbus_service_property(_interface, signature="b",
2096
1609
access="readwrite")
2097
1610
def CheckerRunning_dbus_property(self, value=None):
2098
1611
if value is None: # get
2313
1837
def fingerprint(openpgp):
2314
1838
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
2315
1839
# New GnuTLS "datum" with the OpenPGP public key
2316
datum = gnutls.datum_t(
2317
ctypes.cast(ctypes.c_char_p(openpgp),
2318
ctypes.POINTER(ctypes.c_ubyte)),
2319
ctypes.c_uint(len(openpgp)))
1840
datum = (gnutls.library.types
1841
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1844
ctypes.c_uint(len(openpgp))))
2320
1845
# New empty GnuTLS certificate
2321
crt = gnutls.openpgp_crt_t()
2322
gnutls.openpgp_crt_init(ctypes.byref(crt))
1846
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1847
(gnutls.library.functions
1848
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
2323
1849
# Import the OpenPGP public key into the certificate
2324
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2325
gnutls.OPENPGP_FMT_RAW)
1850
(gnutls.library.functions
1851
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1852
gnutls.library.constants
1853
.GNUTLS_OPENPGP_FMT_RAW))
2326
1854
# Verify the self signature in the key
2327
1855
crtverify = ctypes.c_uint()
2328
gnutls.openpgp_crt_verify_self(crt, 0,
2329
ctypes.byref(crtverify))
1856
(gnutls.library.functions
1857
.gnutls_openpgp_crt_verify_self(crt, 0,
1858
ctypes.byref(crtverify)))
2330
1859
if crtverify.value != 0:
2331
gnutls.openpgp_crt_deinit(crt)
2332
raise gnutls.CertificateSecurityError("Verify failed")
1860
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1861
raise (gnutls.errors.CertificateSecurityError
2333
1863
# New buffer for the fingerprint
2334
1864
buf = ctypes.create_string_buffer(20)
2335
1865
buf_len = ctypes.c_size_t()
2336
1866
# Get the fingerprint from the certificate into the buffer
2337
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2338
ctypes.byref(buf_len))
1867
(gnutls.library.functions
1868
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1869
ctypes.byref(buf_len)))
2339
1870
# Deinit the certificate
2340
gnutls.openpgp_crt_deinit(crt)
1871
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2341
1872
# Convert the buffer to a Python bytestring
2342
1873
fpr = ctypes.string_at(buf, buf_len.value)
2343
1874
# Convert the bytestring to hexadecimal notation
2995
2500
# Close all input and output, do double fork, etc.
2998
# multiprocessing will use threads, so before we use GObject we
2999
# need to inform GObject that threads will be used.
3000
GObject.threads_init()
2503
# multiprocessing will use threads, so before we use gobject we
2504
# need to inform gobject that threads will be used.
2505
gobject.threads_init()
3002
2507
global main_loop
3003
2508
# From the Avahi example code
3004
2509
DBusGMainLoop(set_as_default=True)
3005
main_loop = GObject.MainLoop()
2510
main_loop = gobject.MainLoop()
3006
2511
bus = dbus.SystemBus()
3007
2512
# End of Avahi example code
3010
2515
bus_name = dbus.service.BusName("se.recompile.Mandos",
3013
old_bus_name = dbus.service.BusName(
3014
"se.bsnet.fukt.Mandos", bus,
3016
except dbus.exceptions.DBusException as e:
2516
bus, do_not_queue=True)
2517
old_bus_name = (dbus.service.BusName
2518
("se.bsnet.fukt.Mandos", bus,
2520
except dbus.exceptions.NameExistsException as e:
3017
2521
logger.error("Disabling D-Bus:", exc_info=e)
3018
2522
use_dbus = False
3019
2523
server_settings["use_dbus"] = False
3020
2524
tcp_server.use_dbus = False
3022
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3023
service = AvahiServiceToSyslog(
3024
name = server_settings["servicename"],
3025
servicetype = "_mandos._tcp",
3026
protocol = protocol,
3028
if server_settings["interface"]:
3029
service.interface = if_nametoindex(
3030
server_settings["interface"].encode("utf-8"))
2525
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2526
service = AvahiServiceToSyslog(name =
2527
server_settings["servicename"],
2528
servicetype = "_mandos._tcp",
2529
protocol = protocol, bus = bus)
2530
if server_settings["interface"]:
2531
service.interface = (if_nametoindex
2532
(str(server_settings["interface"])))
3032
2534
global multiprocessing_manager
3033
2535
multiprocessing_manager = multiprocessing.Manager()
3052
2554
if server_settings["restore"]:
3054
2556
with open(stored_state_path, "rb") as stored_state:
3055
if sys.version_info.major == 2:
3056
clients_data, old_client_settings = pickle.load(
3059
bytes_clients_data, bytes_old_client_settings = (
3060
pickle.load(stored_state, encoding = "bytes"))
3061
### Fix bytes to strings
3064
clients_data = { (key.decode("utf-8")
3065
if isinstance(key, bytes)
3068
bytes_clients_data.items() }
3069
del bytes_clients_data
3070
for key in clients_data:
3071
value = { (k.decode("utf-8")
3072
if isinstance(k, bytes) else k): v
3074
clients_data[key].items() }
3075
clients_data[key] = value
3077
value["client_structure"] = [
3079
if isinstance(s, bytes)
3081
value["client_structure"] ]
3083
for k in ("name", "host"):
3084
if isinstance(value[k], bytes):
3085
value[k] = value[k].decode("utf-8")
3086
## old_client_settings
3088
old_client_settings = {
3089
(key.decode("utf-8")
3090
if isinstance(key, bytes)
3093
bytes_old_client_settings.items() }
3094
del bytes_old_client_settings
3096
for value in old_client_settings.values():
3097
if isinstance(value["host"], bytes):
3098
value["host"] = (value["host"]
2557
clients_data, old_client_settings = (pickle.load
3100
2559
os.remove(stored_state_path)
3101
2560
except IOError as e:
3102
2561
if e.errno == errno.ENOENT:
3103
logger.warning("Could not load persistent state:"
3104
" {}".format(os.strerror(e.errno)))
2562
logger.warning("Could not load persistent state: {0}"
2563
.format(os.strerror(e.errno)))
3106
2565
logger.critical("Could not load persistent state:",
3109
2568
except EOFError as e:
3110
2569
logger.warning("Could not load persistent state: "
2570
"EOFError:", exc_info=e)
3114
2572
with PGPEngine() as pgp:
3115
for client_name, client in clients_data.items():
2573
for client_name, client in clients_data.iteritems():
3116
2574
# Skip removed clients
3117
2575
if client_name not in client_settings:
3231
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3233
2691
@dbus.service.signal(_interface, signature="os")
3234
2692
def ClientRemoved(self, objpath, name):
3238
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3240
2696
@dbus.service.method(_interface, out_signature="ao")
3241
2697
def GetAllClients(self):
3243
return dbus.Array(c.dbus_object_path for c in
3244
tcp_server.clients.values())
2699
return dbus.Array(c.dbus_object_path
2701
tcp_server.clients.itervalues())
3246
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3248
2703
@dbus.service.method(_interface,
3249
2704
out_signature="a{oa{sv}}")
3250
2705
def GetAllClientsWithProperties(self):
3252
2707
return dbus.Dictionary(
3253
{ c.dbus_object_path: c.GetAll(
3254
"se.recompile.Mandos.Client")
3255
for c in tcp_server.clients.values() },
2708
((c.dbus_object_path, c.GetAll(""))
2709
for c in tcp_server.clients.itervalues()),
3256
2710
signature="oa{sv}")
3258
2712
@dbus.service.method(_interface, in_signature="o")
3259
2713
def RemoveClient(self, object_path):
3261
for c in tcp_server.clients.values():
2715
for c in tcp_server.clients.itervalues():
3262
2716
if c.dbus_object_path == object_path:
3263
2717
del tcp_server.clients[c.name]
3264
2718
c.remove_from_connection()
3265
# Don't signal the disabling
2719
# Don't signal anything except ClientRemoved
3266
2720
c.disable(quiet=True)
3267
# Emit D-Bus signal for removal
3268
self.client_removed_signal(c)
2722
self.ClientRemoved(object_path, c.name)
3270
2724
raise KeyError(object_path)
3274
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3275
out_signature = "a{oa{sa{sv}}}")
3276
def GetManagedObjects(self):
3278
return dbus.Dictionary(
3279
{ client.dbus_object_path:
3281
{ interface: client.GetAll(interface)
3283
client._get_all_interface_names()})
3284
for client in tcp_server.clients.values()})
3286
def client_added_signal(self, client):
3287
"""Send the new standard signal and the old signal"""
3289
# New standard signal
3290
self.InterfacesAdded(
3291
client.dbus_object_path,
3293
{ interface: client.GetAll(interface)
3295
client._get_all_interface_names()}))
3297
self.ClientAdded(client.dbus_object_path)
3299
def client_removed_signal(self, client):
3300
"""Send the new standard signal and the old signal"""
3302
# New standard signal
3303
self.InterfacesRemoved(
3304
client.dbus_object_path,
3305
client._get_all_interface_names())
3307
self.ClientRemoved(client.dbus_object_path,
3310
2728
mandos_dbus_service = MandosDBusService()
3313
2731
"Cleanup function; run on exit"
3317
2734
multiprocessing.active_children()