174
194
def password_encode(self, password):
175
195
# Passphrase can not be empty and can not contain newlines or
176
196
# NUL bytes. So we prefix it and hex encode it.
177
return b"mandos" + binascii.hexlify(password)
197
encoded = b"mandos" + binascii.hexlify(password)
198
if len(encoded) > 2048:
199
# GnuPG can't handle long passwords, so encode differently
200
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
201
.replace(b"\n", b"\\n")
202
.replace(b"\0", b"\\x00"))
179
205
def encrypt(self, data, password):
180
self.gnupg.passphrase = self.password_encode(password)
181
with open(os.devnull, "w") as devnull:
183
proc = self.gnupg.run(['--symmetric'],
184
create_fhs=['stdin', 'stdout'],
185
attach_fhs={'stderr': devnull})
186
with contextlib.closing(proc.handles['stdin']) as f:
188
with contextlib.closing(proc.handles['stdout']) as f:
189
ciphertext = f.read()
193
self.gnupg.passphrase = None
206
passphrase = self.password_encode(password)
207
with tempfile.NamedTemporaryFile(
208
dir=self.tempdir) as passfile:
209
passfile.write(passphrase)
211
proc = subprocess.Popen([self.gpg, '--symmetric',
215
stdin = subprocess.PIPE,
216
stdout = subprocess.PIPE,
217
stderr = subprocess.PIPE)
218
ciphertext, err = proc.communicate(input = data)
219
if proc.returncode != 0:
194
221
return ciphertext
196
223
def decrypt(self, data, password):
197
self.gnupg.passphrase = self.password_encode(password)
198
with open(os.devnull, "w") as devnull:
200
proc = self.gnupg.run(['--decrypt'],
201
create_fhs=['stdin', 'stdout'],
202
attach_fhs={'stderr': devnull})
203
with contextlib.closing(proc.handles['stdin']) as f:
205
with contextlib.closing(proc.handles['stdout']) as f:
206
decrypted_plaintext = f.read()
210
self.gnupg.passphrase = None
224
passphrase = self.password_encode(password)
225
with tempfile.NamedTemporaryFile(
226
dir = self.tempdir) as passfile:
227
passfile.write(passphrase)
229
proc = subprocess.Popen([self.gpg, '--decrypt',
233
stdin = subprocess.PIPE,
234
stdout = subprocess.PIPE,
235
stderr = subprocess.PIPE)
236
decrypted_plaintext, err = proc.communicate(input = data)
237
if proc.returncode != 0:
211
239
return decrypted_plaintext
214
242
class AvahiError(Exception):
215
243
def __init__(self, value, *args, **kwargs):
216
244
self.value = value
217
super(AvahiError, self).__init__(value, *args, **kwargs)
218
def __unicode__(self):
219
return unicode(repr(self.value))
245
return super(AvahiError, self).__init__(value, *args,
221
249
class AvahiServiceError(AvahiError):
224
253
class AvahiGroupError(AvahiError):
376
427
follow_name_owner_changes=True),
377
428
avahi.DBUS_INTERFACE_SERVER)
378
429
self.server.connect_to_signal("StateChanged",
379
self.server_state_changed)
430
self.server_state_changed)
380
431
self.server_state_changed(self.server.GetState())
383
434
class AvahiServiceToSyslog(AvahiService):
435
def rename(self, *args, **kwargs):
385
436
"""Add the new name to the syslog messages"""
386
ret = AvahiService.rename(self)
387
syslogger.setFormatter(logging.Formatter
388
('Mandos ({0}) [%(process)d]:'
389
' %(levelname)s: %(message)s'
437
ret = AvahiService.rename(self, *args, **kwargs)
438
syslogger.setFormatter(logging.Formatter(
439
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
394
def timedelta_to_milliseconds(td):
395
"Convert a datetime.timedelta() to milliseconds"
396
return ((td.days * 24 * 60 * 60 * 1000)
397
+ (td.seconds * 1000)
398
+ (td.microseconds // 1000))
443
# Pretend that we have a GnuTLS module
444
class GnuTLS(object):
445
"""This isn't so much a class as it is a module-like namespace.
446
It is instantiated once, and simulates having a GnuTLS module."""
448
_library = ctypes.cdll.LoadLibrary(
449
ctypes.util.find_library("gnutls"))
450
_need_version = "3.3.0"
452
# Need to use class name "GnuTLS" here, since this method is
453
# called before the assignment to the "gnutls" global variable
455
if GnuTLS.check_version(self._need_version) is None:
456
raise GnuTLS.Error("Needs GnuTLS {} or later"
457
.format(self._need_version))
459
# Unless otherwise indicated, the constants and types below are
460
# all from the gnutls/gnutls.h C header file.
470
E_NO_CERTIFICATE_FOUND = -49
471
OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
474
class session_int(ctypes.Structure):
476
session_t = ctypes.POINTER(session_int)
477
class certificate_credentials_st(ctypes.Structure):
479
certificate_credentials_t = ctypes.POINTER(
480
certificate_credentials_st)
481
certificate_type_t = ctypes.c_int
482
class datum_t(ctypes.Structure):
483
_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
484
('size', ctypes.c_uint)]
485
class openpgp_crt_int(ctypes.Structure):
487
openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
488
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
489
log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
490
credentials_type_t = ctypes.c_int
491
transport_ptr_t = ctypes.c_void_p
492
close_request_t = ctypes.c_int
495
class Error(Exception):
496
# We need to use the class name "GnuTLS" here, since this
497
# exception might be raised from within GnuTLS.__init__,
498
# which is called before the assignment to the "gnutls"
499
# global variable has happened.
500
def __init__(self, message = None, code = None, args=()):
501
# Default usage is by a message string, but if a return
502
# code is passed, convert it to a string with
505
if message is None and code is not None:
506
message = GnuTLS.strerror(code)
507
return super(GnuTLS.Error, self).__init__(
510
class CertificateSecurityError(Error):
514
class Credentials(object):
516
self._c_object = gnutls.certificate_credentials_t()
517
gnutls.certificate_allocate_credentials(
518
ctypes.byref(self._c_object))
519
self.type = gnutls.CRD_CERTIFICATE
522
gnutls.certificate_free_credentials(self._c_object)
524
class ClientSession(object):
525
def __init__(self, socket, credentials = None):
526
self._c_object = gnutls.session_t()
527
gnutls.init(ctypes.byref(self._c_object), gnutls.CLIENT)
528
gnutls.set_default_priority(self._c_object)
529
gnutls.transport_set_ptr(self._c_object, socket.fileno())
530
gnutls.handshake_set_private_extensions(self._c_object,
533
if credentials is None:
534
credentials = gnutls.Credentials()
535
gnutls.credentials_set(self._c_object, credentials.type,
536
ctypes.cast(credentials._c_object,
538
self.credentials = credentials
541
gnutls.deinit(self._c_object)
544
return gnutls.handshake(self._c_object)
546
def send(self, data):
550
data_len -= gnutls.record_send(self._c_object,
555
return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
557
# Error handling functions
558
def _error_code(result):
559
"""A function to raise exceptions on errors, suitable
560
for the 'restype' attribute on ctypes functions"""
563
if result == gnutls.E_NO_CERTIFICATE_FOUND:
564
raise gnutls.CertificateSecurityError(code = result)
565
raise gnutls.Error(code = result)
567
def _retry_on_error(result, func, arguments):
568
"""A function to retry on some errors, suitable
569
for the 'errcheck' attribute on ctypes functions"""
571
if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
572
return _error_code(result)
573
result = func(*arguments)
576
# Unless otherwise indicated, the function declarations below are
577
# all from the gnutls/gnutls.h C header file.
580
priority_set_direct = _library.gnutls_priority_set_direct
581
priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
582
ctypes.POINTER(ctypes.c_char_p)]
583
priority_set_direct.restype = _error_code
585
init = _library.gnutls_init
586
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
587
init.restype = _error_code
589
set_default_priority = _library.gnutls_set_default_priority
590
set_default_priority.argtypes = [session_t]
591
set_default_priority.restype = _error_code
593
record_send = _library.gnutls_record_send
594
record_send.argtypes = [session_t, ctypes.c_void_p,
596
record_send.restype = ctypes.c_ssize_t
597
record_send.errcheck = _retry_on_error
599
certificate_allocate_credentials = (
600
_library.gnutls_certificate_allocate_credentials)
601
certificate_allocate_credentials.argtypes = [
602
ctypes.POINTER(certificate_credentials_t)]
603
certificate_allocate_credentials.restype = _error_code
605
certificate_free_credentials = (
606
_library.gnutls_certificate_free_credentials)
607
certificate_free_credentials.argtypes = [certificate_credentials_t]
608
certificate_free_credentials.restype = None
610
handshake_set_private_extensions = (
611
_library.gnutls_handshake_set_private_extensions)
612
handshake_set_private_extensions.argtypes = [session_t,
614
handshake_set_private_extensions.restype = None
616
credentials_set = _library.gnutls_credentials_set
617
credentials_set.argtypes = [session_t, credentials_type_t,
619
credentials_set.restype = _error_code
621
strerror = _library.gnutls_strerror
622
strerror.argtypes = [ctypes.c_int]
623
strerror.restype = ctypes.c_char_p
625
certificate_type_get = _library.gnutls_certificate_type_get
626
certificate_type_get.argtypes = [session_t]
627
certificate_type_get.restype = _error_code
629
certificate_get_peers = _library.gnutls_certificate_get_peers
630
certificate_get_peers.argtypes = [session_t,
631
ctypes.POINTER(ctypes.c_uint)]
632
certificate_get_peers.restype = ctypes.POINTER(datum_t)
634
global_set_log_level = _library.gnutls_global_set_log_level
635
global_set_log_level.argtypes = [ctypes.c_int]
636
global_set_log_level.restype = None
638
global_set_log_function = _library.gnutls_global_set_log_function
639
global_set_log_function.argtypes = [log_func]
640
global_set_log_function.restype = None
642
deinit = _library.gnutls_deinit
643
deinit.argtypes = [session_t]
644
deinit.restype = None
646
handshake = _library.gnutls_handshake
647
handshake.argtypes = [session_t]
648
handshake.restype = _error_code
649
handshake.errcheck = _retry_on_error
651
transport_set_ptr = _library.gnutls_transport_set_ptr
652
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
653
transport_set_ptr.restype = None
655
bye = _library.gnutls_bye
656
bye.argtypes = [session_t, close_request_t]
657
bye.restype = _error_code
658
bye.errcheck = _retry_on_error
660
check_version = _library.gnutls_check_version
661
check_version.argtypes = [ctypes.c_char_p]
662
check_version.restype = ctypes.c_char_p
664
# All the function declarations below are from gnutls/openpgp.h
666
openpgp_crt_init = _library.gnutls_openpgp_crt_init
667
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
668
openpgp_crt_init.restype = _error_code
670
openpgp_crt_import = _library.gnutls_openpgp_crt_import
671
openpgp_crt_import.argtypes = [openpgp_crt_t,
672
ctypes.POINTER(datum_t),
674
openpgp_crt_import.restype = _error_code
676
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
677
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
678
ctypes.POINTER(ctypes.c_uint)]
679
openpgp_crt_verify_self.restype = _error_code
681
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
682
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
683
openpgp_crt_deinit.restype = None
685
openpgp_crt_get_fingerprint = (
686
_library.gnutls_openpgp_crt_get_fingerprint)
687
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
691
openpgp_crt_get_fingerprint.restype = _error_code
693
# Remove non-public functions
694
del _error_code, _retry_on_error
695
# Create the global "gnutls" object, simulating a module
698
def call_pipe(connection, # : multiprocessing.Connection
699
func, *args, **kwargs):
700
"""This function is meant to be called by multiprocessing.Process
702
This function runs func(*args, **kwargs), and writes the resulting
703
return value on the provided multiprocessing.Connection.
705
connection.send(func(*args, **kwargs))
401
708
class Client(object):
402
709
"""A representation of a client host served by this server.
609
905
# Schedule a new checker to be started an 'interval' from now,
610
906
# and every interval from then on.
611
907
if self.checker_initiator_tag is not None:
612
gobject.source_remove(self.checker_initiator_tag)
613
self.checker_initiator_tag = (gobject.timeout_add
614
(self.interval_milliseconds(),
908
GObject.source_remove(self.checker_initiator_tag)
909
self.checker_initiator_tag = GObject.timeout_add(
910
int(self.interval.total_seconds() * 1000),
616
912
# Schedule a disable() when 'timeout' has passed
617
913
if self.disable_initiator_tag is not None:
618
gobject.source_remove(self.disable_initiator_tag)
619
self.disable_initiator_tag = (gobject.timeout_add
620
(self.timeout_milliseconds(),
914
GObject.source_remove(self.disable_initiator_tag)
915
self.disable_initiator_tag = GObject.timeout_add(
916
int(self.timeout.total_seconds() * 1000), self.disable)
622
917
# Also start a new checker *right now*.
623
918
self.start_checker()
625
def checker_callback(self, pid, condition, command):
920
def checker_callback(self, source, condition, connection,
626
922
"""The checker has completed, so take appropriate actions."""
627
923
self.checker_callback_tag = None
628
924
self.checker = None
629
if os.WIFEXITED(condition):
630
self.last_checker_status = os.WEXITSTATUS(condition)
925
# Read return code from connection (see call_pipe)
926
returncode = connection.recv()
930
self.last_checker_status = returncode
931
self.last_checker_signal = None
631
932
if self.last_checker_status == 0:
632
933
logger.info("Checker for %(name)s succeeded",
634
935
self.checked_ok()
636
logger.info("Checker for %(name)s failed",
937
logger.info("Checker for %(name)s failed", vars(self))
639
939
self.last_checker_status = -1
940
self.last_checker_signal = -returncode
640
941
logger.warning("Checker for %(name)s crashed?",
643
945
def checked_ok(self):
644
946
"""Assert that the client has been seen, alive and well."""
645
947
self.last_checked_ok = datetime.datetime.utcnow()
646
948
self.last_checker_status = 0
949
self.last_checker_signal = None
647
950
self.bump_timeout()
649
952
def bump_timeout(self, timeout=None):
676
978
# than 'timeout' for the client to be disabled, which is as it
679
# If a checker exists, make sure it is not a zombie
681
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
682
except (AttributeError, OSError) as error:
683
if (isinstance(error, OSError)
684
and error.errno != errno.ECHILD):
688
logger.warning("Checker was a zombie")
689
gobject.source_remove(self.checker_callback_tag)
690
self.checker_callback(pid, status,
691
self.current_checker_command)
981
if self.checker is not None and not self.checker.is_alive():
982
logger.warning("Checker was not alive; joining")
692
985
# Start a new checker if needed
693
986
if self.checker is None:
694
987
# Escape attributes for the shell
695
escaped_attrs = dict(
696
(attr, re.escape(unicode(getattr(self, attr))))
698
self.runtime_expansions)
989
attr: re.escape(str(getattr(self, attr)))
990
for attr in self.runtime_expansions }
700
992
command = self.checker_command % escaped_attrs
701
993
except TypeError as error:
702
994
logger.error('Could not format string "%s"',
703
self.checker_command, exc_info=error)
704
return True # Try again later
995
self.checker_command,
997
return True # Try again later
705
998
self.current_checker_command = command
707
logger.info("Starting checker %r for %s",
709
# We don't need to redirect stdout and stderr, since
710
# in normal mode, that is already done by daemon(),
711
# and in debug mode we don't want to. (Stdin is
712
# always replaced by /dev/null.)
713
self.checker = subprocess.Popen(command,
716
except OSError as error:
717
logger.error("Failed to start subprocess",
719
self.checker_callback_tag = (gobject.child_watch_add
721
self.checker_callback,
723
# The checker may have completed before the gobject
724
# watch was added. Check for this.
725
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
727
gobject.source_remove(self.checker_callback_tag)
728
self.checker_callback(pid, status, command)
729
# Re-run this periodically if run by gobject.timeout_add
999
logger.info("Starting checker %r for %s", command,
1001
# We don't need to redirect stdout and stderr, since
1002
# in normal mode, that is already done by daemon(),
1003
# and in debug mode we don't want to. (Stdin is
1004
# always replaced by /dev/null.)
1005
# The exception is when not debugging but nevertheless
1006
# running in the foreground; use the previously
1008
popen_args = { "close_fds": True,
1011
if (not self.server_settings["debug"]
1012
and self.server_settings["foreground"]):
1013
popen_args.update({"stdout": wnull,
1015
pipe = multiprocessing.Pipe(duplex = False)
1016
self.checker = multiprocessing.Process(
1018
args = (pipe[1], subprocess.call, command),
1019
kwargs = popen_args)
1020
self.checker.start()
1021
self.checker_callback_tag = GObject.io_add_watch(
1022
pipe[0].fileno(), GObject.IO_IN,
1023
self.checker_callback, pipe[0], command)
1024
# Re-run this periodically if run by GObject.timeout_add
732
1027
def stop_checker(self):
733
1028
"""Force the checker process, if any, to stop."""
734
1029
if self.checker_callback_tag:
735
gobject.source_remove(self.checker_callback_tag)
1030
GObject.source_remove(self.checker_callback_tag)
736
1031
self.checker_callback_tag = None
737
1032
if getattr(self, "checker", None) is None:
739
1034
logger.debug("Stopping checker for %(name)s", vars(self))
741
self.checker.terminate()
743
#if self.checker.poll() is None:
744
# self.checker.kill()
745
except OSError as error:
746
if error.errno != errno.ESRCH: # No such process
1035
self.checker.terminate()
748
1036
self.checker = None
751
def dbus_service_property(dbus_interface, signature="v",
752
access="readwrite", byte_arrays=False):
1039
def dbus_service_property(dbus_interface,
753
1043
"""Decorators for marking methods of a DBusObjectWithProperties to
754
1044
become properties on the D-Bus.
849
1145
If called like _is_dbus_thing("method") it returns a function
850
1146
suitable for use as predicate to inspect.getmembers().
852
return lambda obj: getattr(obj, "_dbus_is_{0}".format(thing),
1148
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
855
1151
def _get_all_dbus_things(self, thing):
856
1152
"""Returns a generator of (name, attribute) pairs
858
return ((getattr(athing.__get__(self), "_dbus_name",
1154
return ((getattr(athing.__get__(self), "_dbus_name", name),
860
1155
athing.__get__(self))
861
1156
for cls in self.__class__.__mro__
862
1157
for name, athing in
863
inspect.getmembers(cls,
864
self._is_dbus_thing(thing)))
1158
inspect.getmembers(cls, self._is_dbus_thing(thing)))
1160
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1161
out_signature = "s",
1162
path_keyword = 'object_path',
1163
connection_keyword = 'connection')
1164
def Introspect(self, object_path, connection):
1165
"""Overloading of standard D-Bus method.
1167
Inserts annotation tags on methods and signals.
1169
xmlstring = dbus.service.Object.Introspect(self, object_path,
1172
document = xml.dom.minidom.parseString(xmlstring)
1174
for if_tag in document.getElementsByTagName("interface"):
1175
# Add annotation tags
1176
for typ in ("method", "signal"):
1177
for tag in if_tag.getElementsByTagName(typ):
1179
for name, prop in (self.
1180
_get_all_dbus_things(typ)):
1181
if (name == tag.getAttribute("name")
1182
and prop._dbus_interface
1183
== if_tag.getAttribute("name")):
1184
annots.update(getattr(
1185
prop, "_dbus_annotations", {}))
1186
for name, value in annots.items():
1187
ann_tag = document.createElement(
1189
ann_tag.setAttribute("name", name)
1190
ann_tag.setAttribute("value", value)
1191
tag.appendChild(ann_tag)
1192
# Add interface annotation tags
1193
for annotation, value in dict(
1194
itertools.chain.from_iterable(
1195
annotations().items()
1196
for name, annotations
1197
in self._get_all_dbus_things("interface")
1198
if name == if_tag.getAttribute("name")
1200
ann_tag = document.createElement("annotation")
1201
ann_tag.setAttribute("name", annotation)
1202
ann_tag.setAttribute("value", value)
1203
if_tag.appendChild(ann_tag)
1204
# Fix argument name for the Introspect method itself
1205
if (if_tag.getAttribute("name")
1206
== dbus.INTROSPECTABLE_IFACE):
1207
for cn in if_tag.getElementsByTagName("method"):
1208
if cn.getAttribute("name") == "Introspect":
1209
for arg in cn.getElementsByTagName("arg"):
1210
if (arg.getAttribute("direction")
1212
arg.setAttribute("name",
1214
xmlstring = document.toxml("utf-8")
1216
except (AttributeError, xml.dom.DOMException,
1217
xml.parsers.expat.ExpatError) as error:
1218
logger.error("Failed to override Introspection method",
1223
class DBusObjectWithProperties(DBusObjectWithAnnotations):
1224
"""A D-Bus object with properties.
1226
Classes inheriting from this can use the dbus_service_property
1227
decorator to expose methods as D-Bus properties. It exposes the
1228
standard Get(), Set(), and GetAll() methods on the D-Bus.
866
1231
def _get_dbus_property(self, interface_name, property_name):
867
1232
"""Returns a bound method if one exists which is a D-Bus
868
1233
property with the specified name and interface.
870
for cls in self.__class__.__mro__:
871
for name, value in (inspect.getmembers
873
self._is_dbus_thing("property"))):
1235
for cls in self.__class__.__mro__:
1236
for name, value in inspect.getmembers(
1237
cls, self._is_dbus_thing("property")):
874
1238
if (value._dbus_name == property_name
875
1239
and value._dbus_interface == interface_name):
876
1240
return value.__get__(self)
878
1242
# No such property
879
raise DBusPropertyNotFound(self.dbus_object_path + ":"
880
+ interface_name + "."
883
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
1243
raise DBusPropertyNotFound("{}:{}.{}".format(
1244
self.dbus_object_path, interface_name, property_name))
1247
def _get_all_interface_names(cls):
1248
"""Get a sequence of all interfaces supported by an object"""
1249
return (name for name in set(getattr(getattr(x, attr),
1250
"_dbus_interface", None)
1251
for x in (inspect.getmro(cls))
1253
if name is not None)
1255
@dbus.service.method(dbus.PROPERTIES_IFACE,
884
1257
out_signature="v")
885
1258
def Get(self, interface_name, property_name):
886
1259
"""Standard D-Bus property Get() method, see D-Bus standard.
1015
1387
exc_info=error)
1016
1388
return xmlstring
1019
def datetime_to_dbus (dt, variant_level=0):
1391
dbus.OBJECT_MANAGER_IFACE
1392
except AttributeError:
1393
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1395
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1396
"""A D-Bus object with an ObjectManager.
1398
Classes inheriting from this exposes the standard
1399
GetManagedObjects call and the InterfacesAdded and
1400
InterfacesRemoved signals on the standard
1401
"org.freedesktop.DBus.ObjectManager" interface.
1403
Note: No signals are sent automatically; they must be sent
1406
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1407
out_signature = "a{oa{sa{sv}}}")
1408
def GetManagedObjects(self):
1409
"""This function must be overridden"""
1410
raise NotImplementedError()
1412
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1413
signature = "oa{sa{sv}}")
1414
def InterfacesAdded(self, object_path, interfaces_and_properties):
1417
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature = "oas")
1418
def InterfacesRemoved(self, object_path, interfaces):
1421
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1422
out_signature = "s",
1423
path_keyword = 'object_path',
1424
connection_keyword = 'connection')
1425
def Introspect(self, object_path, connection):
1426
"""Overloading of standard D-Bus method.
1428
Override return argument name of GetManagedObjects to be
1429
"objpath_interfaces_and_properties"
1431
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1435
document = xml.dom.minidom.parseString(xmlstring)
1437
for if_tag in document.getElementsByTagName("interface"):
1438
# Fix argument name for the GetManagedObjects method
1439
if (if_tag.getAttribute("name")
1440
== dbus.OBJECT_MANAGER_IFACE):
1441
for cn in if_tag.getElementsByTagName("method"):
1442
if (cn.getAttribute("name")
1443
== "GetManagedObjects"):
1444
for arg in cn.getElementsByTagName("arg"):
1445
if (arg.getAttribute("direction")
1449
"objpath_interfaces"
1451
xmlstring = document.toxml("utf-8")
1453
except (AttributeError, xml.dom.DOMException,
1454
xml.parsers.expat.ExpatError) as error:
1455
logger.error("Failed to override Introspection method",
1459
def datetime_to_dbus(dt, variant_level=0):
1020
1460
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1022
1462
return dbus.String("", variant_level = variant_level)
1023
return dbus.String(dt.isoformat(),
1024
variant_level=variant_level)
1463
return dbus.String(dt.isoformat(), variant_level=variant_level)
1027
1466
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1057
1497
# Ignore non-D-Bus attributes, and D-Bus attributes
1058
1498
# with the wrong interface name
1059
1499
if (not hasattr(attribute, "_dbus_interface")
1060
or not attribute._dbus_interface
1061
.startswith(orig_interface_name)):
1500
or not attribute._dbus_interface.startswith(
1501
orig_interface_name)):
1063
1503
# Create an alternate D-Bus interface name based on
1064
1504
# the current name
1065
alt_interface = (attribute._dbus_interface
1066
.replace(orig_interface_name,
1067
alt_interface_name))
1505
alt_interface = attribute._dbus_interface.replace(
1506
orig_interface_name, alt_interface_name)
1068
1507
interface_names.add(alt_interface)
1069
1508
# Is this a D-Bus signal?
1070
1509
if getattr(attribute, "_dbus_is_signal", False):
1071
# Extract the original non-method function by
1073
nonmethod_func = (dict(
1510
if sys.version_info.major == 2:
1511
# Extract the original non-method undecorated
1512
# function by black magic
1513
nonmethod_func = (dict(
1074
1514
zip(attribute.func_code.co_freevars,
1075
attribute.__closure__))["func"]
1515
attribute.__closure__))
1516
["func"].cell_contents)
1518
nonmethod_func = attribute
1077
1519
# Create a new, but exactly alike, function
1078
1520
# object, and decorate it to be a new D-Bus signal
1079
1521
# with the alternate D-Bus interface name
1080
new_function = (dbus.service.signal
1082
attribute._dbus_signature)
1083
(types.FunctionType(
1084
nonmethod_func.func_code,
1085
nonmethod_func.func_globals,
1086
nonmethod_func.func_name,
1087
nonmethod_func.func_defaults,
1088
nonmethod_func.func_closure)))
1522
if sys.version_info.major == 2:
1523
new_function = types.FunctionType(
1524
nonmethod_func.func_code,
1525
nonmethod_func.func_globals,
1526
nonmethod_func.func_name,
1527
nonmethod_func.func_defaults,
1528
nonmethod_func.func_closure)
1530
new_function = types.FunctionType(
1531
nonmethod_func.__code__,
1532
nonmethod_func.__globals__,
1533
nonmethod_func.__name__,
1534
nonmethod_func.__defaults__,
1535
nonmethod_func.__closure__)
1536
new_function = (dbus.service.signal(
1538
attribute._dbus_signature)(new_function))
1089
1539
# Copy annotations, if any
1091
new_function._dbus_annotations = (
1092
dict(attribute._dbus_annotations))
1541
new_function._dbus_annotations = dict(
1542
attribute._dbus_annotations)
1093
1543
except AttributeError:
1095
1545
# Define a creator of a function to call both the
1298
1769
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1299
1770
Client.__del__(self, *args, **kwargs)
1301
def checker_callback(self, pid, condition, command,
1303
self.checker_callback_tag = None
1305
if os.WIFEXITED(condition):
1306
exitstatus = os.WEXITSTATUS(condition)
1772
def checker_callback(self, source, condition,
1773
connection, command, *args, **kwargs):
1774
ret = Client.checker_callback(self, source, condition,
1775
connection, command, *args,
1777
exitstatus = self.last_checker_status
1307
1779
# Emit D-Bus signal
1308
1780
self.CheckerCompleted(dbus.Int16(exitstatus),
1309
dbus.Int64(condition),
1781
# This is specific to GNU libC
1782
dbus.Int64(exitstatus << 8),
1310
1783
dbus.String(command))
1312
1785
# Emit D-Bus signal
1313
1786
self.CheckerCompleted(dbus.Int16(-1),
1314
dbus.Int64(condition),
1788
# This is specific to GNU libC
1790
| self.last_checker_signal),
1315
1791
dbus.String(command))
1317
return Client.checker_callback(self, pid, condition, command,
1320
1794
def start_checker(self, *args, **kwargs):
1321
old_checker = self.checker
1322
if self.checker is not None:
1323
old_checker_pid = self.checker.pid
1325
old_checker_pid = None
1795
old_checker_pid = getattr(self.checker, "pid", None)
1326
1796
r = Client.start_checker(self, *args, **kwargs)
1327
1797
# Only if new checker process was started
1328
1798
if (self.checker is not None
1444
1913
self.approved_by_default = bool(value)
1446
1915
# ApprovalDelay - property
1447
@dbus_service_property(_interface, signature="t",
1916
@dbus_service_property(_interface,
1448
1918
access="readwrite")
1449
1919
def ApprovalDelay_dbus_property(self, value=None):
1450
1920
if value is None: # get
1451
return dbus.UInt64(self.approval_delay_milliseconds())
1921
return dbus.UInt64(self.approval_delay.total_seconds()
1452
1923
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1454
1925
# ApprovalDuration - property
1455
@dbus_service_property(_interface, signature="t",
1926
@dbus_service_property(_interface,
1456
1928
access="readwrite")
1457
1929
def ApprovalDuration_dbus_property(self, value=None):
1458
1930
if value is None: # get
1459
return dbus.UInt64(timedelta_to_milliseconds(
1460
self.approval_duration))
1931
return dbus.UInt64(self.approval_duration.total_seconds()
1461
1933
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1463
1935
# Name - property
1937
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1464
1938
@dbus_service_property(_interface, signature="s", access="read")
1465
1939
def Name_dbus_property(self):
1466
1940
return dbus.String(self.name)
1468
1942
# Fingerprint - property
1944
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1469
1945
@dbus_service_property(_interface, signature="s", access="read")
1470
1946
def Fingerprint_dbus_property(self):
1471
1947
return dbus.String(self.fingerprint)
1473
1949
# Host - property
1474
@dbus_service_property(_interface, signature="s",
1950
@dbus_service_property(_interface,
1475
1952
access="readwrite")
1476
1953
def Host_dbus_property(self, value=None):
1477
1954
if value is None: # get
1478
1955
return dbus.String(self.host)
1479
self.host = unicode(value)
1956
self.host = str(value)
1481
1958
# Created - property
1960
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1482
1961
@dbus_service_property(_interface, signature="s", access="read")
1483
1962
def Created_dbus_property(self):
1484
1963
return datetime_to_dbus(self.created)
1543
2024
if (getattr(self, "disable_initiator_tag", None)
1546
gobject.source_remove(self.disable_initiator_tag)
1547
self.disable_initiator_tag = (
1548
gobject.timeout_add(
1549
timedelta_to_milliseconds(self.expires - now),
2027
GObject.source_remove(self.disable_initiator_tag)
2028
self.disable_initiator_tag = GObject.timeout_add(
2029
int((self.expires - now).total_seconds() * 1000),
1552
2032
# ExtendedTimeout - property
1553
@dbus_service_property(_interface, signature="t",
2033
@dbus_service_property(_interface,
1554
2035
access="readwrite")
1555
2036
def ExtendedTimeout_dbus_property(self, value=None):
1556
2037
if value is None: # get
1557
return dbus.UInt64(self.extended_timeout_milliseconds())
2038
return dbus.UInt64(self.extended_timeout.total_seconds()
1558
2040
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1560
2042
# Interval - property
1561
@dbus_service_property(_interface, signature="t",
2043
@dbus_service_property(_interface,
1562
2045
access="readwrite")
1563
2046
def Interval_dbus_property(self, value=None):
1564
2047
if value is None: # get
1565
return dbus.UInt64(self.interval_milliseconds())
2048
return dbus.UInt64(self.interval.total_seconds() * 1000)
1566
2049
self.interval = datetime.timedelta(0, 0, 0, value)
1567
2050
if getattr(self, "checker_initiator_tag", None) is None:
1569
2052
if self.enabled:
1570
2053
# Reschedule checker run
1571
gobject.source_remove(self.checker_initiator_tag)
1572
self.checker_initiator_tag = (gobject.timeout_add
1573
(value, self.start_checker))
1574
self.start_checker() # Start one now, too
2054
GObject.source_remove(self.checker_initiator_tag)
2055
self.checker_initiator_tag = GObject.timeout_add(
2056
value, self.start_checker)
2057
self.start_checker() # Start one now, too
1576
2059
# Checker - property
1577
@dbus_service_property(_interface, signature="s",
2060
@dbus_service_property(_interface,
1578
2062
access="readwrite")
1579
2063
def Checker_dbus_property(self, value=None):
1580
2064
if value is None: # get
1581
2065
return dbus.String(self.checker_command)
1582
self.checker_command = unicode(value)
2066
self.checker_command = str(value)
1584
2068
# CheckerRunning - property
1585
@dbus_service_property(_interface, signature="b",
2069
@dbus_service_property(_interface,
1586
2071
access="readwrite")
1587
2072
def CheckerRunning_dbus_property(self, value=None):
1588
2073
if value is None: # get
1814
2288
def fingerprint(openpgp):
1815
2289
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1816
2290
# New GnuTLS "datum" with the OpenPGP public key
1817
datum = (gnutls.library.types
1818
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1821
ctypes.c_uint(len(openpgp))))
2291
datum = gnutls.datum_t(
2292
ctypes.cast(ctypes.c_char_p(openpgp),
2293
ctypes.POINTER(ctypes.c_ubyte)),
2294
ctypes.c_uint(len(openpgp)))
1822
2295
# New empty GnuTLS certificate
1823
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1824
(gnutls.library.functions
1825
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
2296
crt = gnutls.openpgp_crt_t()
2297
gnutls.openpgp_crt_init(ctypes.byref(crt))
1826
2298
# Import the OpenPGP public key into the certificate
1827
(gnutls.library.functions
1828
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1829
gnutls.library.constants
1830
.GNUTLS_OPENPGP_FMT_RAW))
2299
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2300
gnutls.OPENPGP_FMT_RAW)
1831
2301
# Verify the self signature in the key
1832
2302
crtverify = ctypes.c_uint()
1833
(gnutls.library.functions
1834
.gnutls_openpgp_crt_verify_self(crt, 0,
1835
ctypes.byref(crtverify)))
2303
gnutls.openpgp_crt_verify_self(crt, 0,
2304
ctypes.byref(crtverify))
1836
2305
if crtverify.value != 0:
1837
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1838
raise (gnutls.errors.CertificateSecurityError
2306
gnutls.openpgp_crt_deinit(crt)
2307
raise gnutls.CertificateSecurityError("Verify failed")
1840
2308
# New buffer for the fingerprint
1841
2309
buf = ctypes.create_string_buffer(20)
1842
2310
buf_len = ctypes.c_size_t()
1843
2311
# Get the fingerprint from the certificate into the buffer
1844
(gnutls.library.functions
1845
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1846
ctypes.byref(buf_len)))
2312
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2313
ctypes.byref(buf_len))
1847
2314
# Deinit the certificate
1848
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2315
gnutls.openpgp_crt_deinit(crt)
1849
2316
# Convert the buffer to a Python bytestring
1850
2317
fpr = ctypes.string_at(buf, buf_len.value)
1851
2318
# Convert the bytestring to hexadecimal notation
2572
def rfc3339_duration_to_delta(duration):
2573
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2575
>>> rfc3339_duration_to_delta("P7D")
2576
datetime.timedelta(7)
2577
>>> rfc3339_duration_to_delta("PT60S")
2578
datetime.timedelta(0, 60)
2579
>>> rfc3339_duration_to_delta("PT60M")
2580
datetime.timedelta(0, 3600)
2581
>>> rfc3339_duration_to_delta("PT24H")
2582
datetime.timedelta(1)
2583
>>> rfc3339_duration_to_delta("P1W")
2584
datetime.timedelta(7)
2585
>>> rfc3339_duration_to_delta("PT5M30S")
2586
datetime.timedelta(0, 330)
2587
>>> rfc3339_duration_to_delta("P1DT3M20S")
2588
datetime.timedelta(1, 200)
2591
# Parsing an RFC 3339 duration with regular expressions is not
2592
# possible - there would have to be multiple places for the same
2593
# values, like seconds. The current code, while more esoteric, is
2594
# cleaner without depending on a parsing library. If Python had a
2595
# built-in library for parsing we would use it, but we'd like to
2596
# avoid excessive use of external libraries.
2598
# New type for defining tokens, syntax, and semantics all-in-one
2599
Token = collections.namedtuple("Token", (
2600
"regexp", # To match token; if "value" is not None, must have
2601
# a "group" containing digits
2602
"value", # datetime.timedelta or None
2603
"followers")) # Tokens valid after this token
2604
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2605
# the "duration" ABNF definition in RFC 3339, Appendix A.
2606
token_end = Token(re.compile(r"$"), None, frozenset())
2607
token_second = Token(re.compile(r"(\d+)S"),
2608
datetime.timedelta(seconds=1),
2609
frozenset((token_end, )))
2610
token_minute = Token(re.compile(r"(\d+)M"),
2611
datetime.timedelta(minutes=1),
2612
frozenset((token_second, token_end)))
2613
token_hour = Token(re.compile(r"(\d+)H"),
2614
datetime.timedelta(hours=1),
2615
frozenset((token_minute, token_end)))
2616
token_time = Token(re.compile(r"T"),
2618
frozenset((token_hour, token_minute,
2620
token_day = Token(re.compile(r"(\d+)D"),
2621
datetime.timedelta(days=1),
2622
frozenset((token_time, token_end)))
2623
token_month = Token(re.compile(r"(\d+)M"),
2624
datetime.timedelta(weeks=4),
2625
frozenset((token_day, token_end)))
2626
token_year = Token(re.compile(r"(\d+)Y"),
2627
datetime.timedelta(weeks=52),
2628
frozenset((token_month, token_end)))
2629
token_week = Token(re.compile(r"(\d+)W"),
2630
datetime.timedelta(weeks=1),
2631
frozenset((token_end, )))
2632
token_duration = Token(re.compile(r"P"), None,
2633
frozenset((token_year, token_month,
2634
token_day, token_time,
2636
# Define starting values
2637
value = datetime.timedelta() # Value so far
2639
followers = frozenset((token_duration, )) # Following valid tokens
2640
s = duration # String left to parse
2641
# Loop until end token is found
2642
while found_token is not token_end:
2643
# Search for any currently valid tokens
2644
for token in followers:
2645
match = token.regexp.match(s)
2646
if match is not None:
2648
if token.value is not None:
2649
# Value found, parse digits
2650
factor = int(match.group(1), 10)
2651
# Add to value so far
2652
value += factor * token.value
2653
# Strip token from string
2654
s = token.regexp.sub("", s, 1)
2657
# Set valid next tokens
2658
followers = found_token.followers
2661
# No currently valid tokens were found
2662
raise ValueError("Invalid RFC 3339 duration: {!r}"
2065
2668
def string_to_delta(interval):
2066
2669
"""Parse a string and return a datetime.timedelta
2182
2799
"debug": "False",
2184
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2801
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2802
":+SIGN-DSA-SHA256",
2185
2803
"servicename": "Mandos",
2186
2804
"use_dbus": "True",
2187
2805
"use_ipv6": "True",
2188
2806
"debuglevel": "",
2189
2807
"restore": "True",
2190
"statedir": "/var/lib/mandos"
2809
"statedir": "/var/lib/mandos",
2810
"foreground": "False",
2193
2814
# Parse config file for server-global settings
2194
2815
server_config = configparser.SafeConfigParser(server_defaults)
2195
2816
del server_defaults
2196
server_config.read(os.path.join(options.configdir,
2817
server_config.read(os.path.join(options.configdir, "mandos.conf"))
2198
2818
# Convert the SafeConfigParser object to a dict
2199
2819
server_settings = server_config.defaults()
2200
2820
# Use the appropriate methods on the non-string config options
2201
for option in ("debug", "use_dbus", "use_ipv6"):
2821
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
2202
2822
server_settings[option] = server_config.getboolean("DEFAULT",
2204
2824
if server_settings["port"]:
2205
2825
server_settings["port"] = server_config.getint("DEFAULT",
2827
if server_settings["socket"]:
2828
server_settings["socket"] = server_config.getint("DEFAULT",
2830
# Later, stdin will, and stdout and stderr might, be dup'ed
2831
# over with an opened os.devnull. But we don't want this to
2832
# happen with a supplied network socket.
2833
if 0 <= server_settings["socket"] <= 2:
2834
server_settings["socket"] = os.dup(server_settings
2207
2836
del server_config
2209
2838
# Override the settings from the config file with command line
2210
2839
# options, if set.
2211
2840
for option in ("interface", "address", "port", "debug",
2212
"priority", "servicename", "configdir",
2213
"use_dbus", "use_ipv6", "debuglevel", "restore",
2841
"priority", "servicename", "configdir", "use_dbus",
2842
"use_ipv6", "debuglevel", "restore", "statedir",
2843
"socket", "foreground", "zeroconf"):
2215
2844
value = getattr(options, option)
2216
2845
if value is not None:
2217
2846
server_settings[option] = value
2219
2848
# Force all strings to be unicode
2220
2849
for option in server_settings.keys():
2221
if type(server_settings[option]) is str:
2222
server_settings[option] = unicode(server_settings[option])
2850
if isinstance(server_settings[option], bytes):
2851
server_settings[option] = (server_settings[option]
2853
# Force all boolean options to be boolean
2854
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2855
"foreground", "zeroconf"):
2856
server_settings[option] = bool(server_settings[option])
2857
# Debug implies foreground
2858
if server_settings["debug"]:
2859
server_settings["foreground"] = True
2223
2860
# Now we have our good server settings in "server_settings"
2225
2862
##################################################################
2864
if (not server_settings["zeroconf"]
2865
and not (server_settings["port"]
2866
or server_settings["socket"] != "")):
2867
parser.error("Needs port or socket to work without Zeroconf")
2227
2869
# For convenience
2228
2870
debug = server_settings["debug"]
2229
2871
debuglevel = server_settings["debuglevel"]
2314
2968
# Need to fork before connecting to D-Bus
2316
2970
# Close all input and output, do double fork, etc.
2319
gobject.threads_init()
2973
# multiprocessing will use threads, so before we use GObject we
2974
# need to inform GObject that threads will be used.
2975
GObject.threads_init()
2321
2977
global main_loop
2322
2978
# From the Avahi example code
2323
2979
DBusGMainLoop(set_as_default=True)
2324
main_loop = gobject.MainLoop()
2980
main_loop = GObject.MainLoop()
2325
2981
bus = dbus.SystemBus()
2326
2982
# End of Avahi example code
2329
2985
bus_name = dbus.service.BusName("se.recompile.Mandos",
2330
bus, do_not_queue=True)
2331
old_bus_name = (dbus.service.BusName
2332
("se.bsnet.fukt.Mandos", bus,
2334
except dbus.exceptions.NameExistsException as e:
2988
old_bus_name = dbus.service.BusName(
2989
"se.bsnet.fukt.Mandos", bus,
2991
except dbus.exceptions.DBusException as e:
2335
2992
logger.error("Disabling D-Bus:", exc_info=e)
2336
2993
use_dbus = False
2337
2994
server_settings["use_dbus"] = False
2338
2995
tcp_server.use_dbus = False
2339
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2340
service = AvahiServiceToSyslog(name =
2341
server_settings["servicename"],
2342
servicetype = "_mandos._tcp",
2343
protocol = protocol, bus = bus)
2344
if server_settings["interface"]:
2345
service.interface = (if_nametoindex
2346
(str(server_settings["interface"])))
2997
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2998
service = AvahiServiceToSyslog(
2999
name = server_settings["servicename"],
3000
servicetype = "_mandos._tcp",
3001
protocol = protocol,
3003
if server_settings["interface"]:
3004
service.interface = if_nametoindex(
3005
server_settings["interface"].encode("utf-8"))
2348
3007
global multiprocessing_manager
2349
3008
multiprocessing_manager = multiprocessing.Manager()