183
235
.replace(b"\n", b"\\n")
184
236
.replace(b"\0", b"\\x00"))
187
239
def encrypt(self, data, password):
188
240
passphrase = self.password_encode(password)
189
with tempfile.NamedTemporaryFile(dir=self.tempdir
241
with tempfile.NamedTemporaryFile(
242
dir=self.tempdir) as passfile:
191
243
passfile.write(passphrase)
193
proc = subprocess.Popen(['gpg', '--symmetric',
245
proc = subprocess.Popen([self.gpg, '--symmetric',
194
246
'--passphrase-file',
196
248
+ self.gnupgargs,
197
stdin = subprocess.PIPE,
198
stdout = subprocess.PIPE,
199
stderr = subprocess.PIPE)
200
ciphertext, err = proc.communicate(input = data)
249
stdin=subprocess.PIPE,
250
stdout=subprocess.PIPE,
251
stderr=subprocess.PIPE)
252
ciphertext, err = proc.communicate(input=data)
201
253
if proc.returncode != 0:
202
254
raise PGPError(err)
203
255
return ciphertext
205
257
def decrypt(self, data, password):
206
258
passphrase = self.password_encode(password)
207
with tempfile.NamedTemporaryFile(dir = self.tempdir
259
with tempfile.NamedTemporaryFile(
260
dir=self.tempdir) as passfile:
209
261
passfile.write(passphrase)
211
proc = subprocess.Popen(['gpg', '--decrypt',
263
proc = subprocess.Popen([self.gpg, '--decrypt',
212
264
'--passphrase-file',
214
266
+ self.gnupgargs,
215
stdin = subprocess.PIPE,
216
stdout = subprocess.PIPE,
217
stderr = subprocess.PIPE)
218
decrypted_plaintext, err = proc.communicate(input
267
stdin=subprocess.PIPE,
268
stdout=subprocess.PIPE,
269
stderr=subprocess.PIPE)
270
decrypted_plaintext, err = proc.communicate(input=data)
220
271
if proc.returncode != 0:
221
272
raise PGPError(err)
222
273
return decrypted_plaintext
276
# Pretend that we have an Avahi module
278
"""This isn't so much a class as it is a module-like namespace.
279
It is instantiated once, and simulates having an Avahi module."""
280
IF_UNSPEC = -1 # avahi-common/address.h
281
PROTO_UNSPEC = -1 # avahi-common/address.h
282
PROTO_INET = 0 # avahi-common/address.h
283
PROTO_INET6 = 1 # avahi-common/address.h
284
DBUS_NAME = "org.freedesktop.Avahi"
285
DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"
286
DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"
287
DBUS_PATH_SERVER = "/"
289
def string_array_to_txt_array(self, t):
290
return dbus.Array((dbus.ByteArray(s.encode("utf-8"))
291
for s in t), signature="ay")
292
ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h
293
ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h
294
ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h
295
SERVER_INVALID = 0 # avahi-common/defs.h
296
SERVER_REGISTERING = 1 # avahi-common/defs.h
297
SERVER_RUNNING = 2 # avahi-common/defs.h
298
SERVER_COLLISION = 3 # avahi-common/defs.h
299
SERVER_FAILURE = 4 # avahi-common/defs.h
225
303
class AvahiError(Exception):
226
304
def __init__(self, value, *args, **kwargs):
227
305
self.value = value
228
306
return super(AvahiError, self).__init__(value, *args,
231
310
class AvahiServiceError(AvahiError):
234
314
class AvahiGroupError(AvahiError):
238
318
class AvahiService(object):
239
319
"""An Avahi (Zeroconf) service.
242
322
interface: integer; avahi.IF_UNSPEC or an interface index.
243
323
Used to optionally bind to the specified interface.
400
496
def rename(self, *args, **kwargs):
401
497
"""Add the new name to the syslog messages"""
402
498
ret = AvahiService.rename(self, *args, **kwargs)
403
syslogger.setFormatter(logging.Formatter
404
('Mandos ({}) [%(process)d]:'
405
' %(levelname)s: %(message)s'
499
syslogger.setFormatter(logging.Formatter(
500
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
505
# Pretend that we have a GnuTLS module
506
class GnuTLS(object):
507
"""This isn't so much a class as it is a module-like namespace.
508
It is instantiated once, and simulates having a GnuTLS module."""
510
library = ctypes.util.find_library("gnutls")
512
library = ctypes.util.find_library("gnutls-deb0")
513
_library = ctypes.cdll.LoadLibrary(library)
515
_need_version = b"3.3.0"
518
# Need to use class name "GnuTLS" here, since this method is
519
# called before the assignment to the "gnutls" global variable
521
if GnuTLS.check_version(self._need_version) is None:
522
raise GnuTLS.Error("Needs GnuTLS {} or later"
523
.format(self._need_version))
525
# Unless otherwise indicated, the constants and types below are
526
# all from the gnutls/gnutls.h C header file.
536
E_NO_CERTIFICATE_FOUND = -49
537
OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
540
class session_int(ctypes.Structure):
542
session_t = ctypes.POINTER(session_int)
544
class certificate_credentials_st(ctypes.Structure):
546
certificate_credentials_t = ctypes.POINTER(
547
certificate_credentials_st)
548
certificate_type_t = ctypes.c_int
550
class datum_t(ctypes.Structure):
551
_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
552
('size', ctypes.c_uint)]
554
class openpgp_crt_int(ctypes.Structure):
556
openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
557
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
558
log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
559
credentials_type_t = ctypes.c_int
560
transport_ptr_t = ctypes.c_void_p
561
close_request_t = ctypes.c_int
564
class Error(Exception):
565
# We need to use the class name "GnuTLS" here, since this
566
# exception might be raised from within GnuTLS.__init__,
567
# which is called before the assignment to the "gnutls"
568
# global variable has happened.
569
def __init__(self, message=None, code=None, args=()):
570
# Default usage is by a message string, but if a return
571
# code is passed, convert it to a string with
574
if message is None and code is not None:
575
message = GnuTLS.strerror(code)
576
return super(GnuTLS.Error, self).__init__(
579
class CertificateSecurityError(Error):
583
class Credentials(object):
585
self._c_object = gnutls.certificate_credentials_t()
586
gnutls.certificate_allocate_credentials(
587
ctypes.byref(self._c_object))
588
self.type = gnutls.CRD_CERTIFICATE
591
gnutls.certificate_free_credentials(self._c_object)
593
class ClientSession(object):
594
def __init__(self, socket, credentials=None):
595
self._c_object = gnutls.session_t()
596
gnutls.init(ctypes.byref(self._c_object), gnutls.CLIENT)
597
gnutls.set_default_priority(self._c_object)
598
gnutls.transport_set_ptr(self._c_object, socket.fileno())
599
gnutls.handshake_set_private_extensions(self._c_object,
602
if credentials is None:
603
credentials = gnutls.Credentials()
604
gnutls.credentials_set(self._c_object, credentials.type,
605
ctypes.cast(credentials._c_object,
607
self.credentials = credentials
610
gnutls.deinit(self._c_object)
613
return gnutls.handshake(self._c_object)
615
def send(self, data):
619
data_len -= gnutls.record_send(self._c_object,
624
return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
626
# Error handling functions
627
def _error_code(result):
628
"""A function to raise exceptions on errors, suitable
629
for the 'restype' attribute on ctypes functions"""
632
if result == gnutls.E_NO_CERTIFICATE_FOUND:
633
raise gnutls.CertificateSecurityError(code=result)
634
raise gnutls.Error(code=result)
636
def _retry_on_error(result, func, arguments):
637
"""A function to retry on some errors, suitable
638
for the 'errcheck' attribute on ctypes functions"""
640
if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
641
return _error_code(result)
642
result = func(*arguments)
645
# Unless otherwise indicated, the function declarations below are
646
# all from the gnutls/gnutls.h C header file.
649
priority_set_direct = _library.gnutls_priority_set_direct
650
priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
651
ctypes.POINTER(ctypes.c_char_p)]
652
priority_set_direct.restype = _error_code
654
init = _library.gnutls_init
655
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
656
init.restype = _error_code
658
set_default_priority = _library.gnutls_set_default_priority
659
set_default_priority.argtypes = [session_t]
660
set_default_priority.restype = _error_code
662
record_send = _library.gnutls_record_send
663
record_send.argtypes = [session_t, ctypes.c_void_p,
665
record_send.restype = ctypes.c_ssize_t
666
record_send.errcheck = _retry_on_error
668
certificate_allocate_credentials = (
669
_library.gnutls_certificate_allocate_credentials)
670
certificate_allocate_credentials.argtypes = [
671
ctypes.POINTER(certificate_credentials_t)]
672
certificate_allocate_credentials.restype = _error_code
674
certificate_free_credentials = (
675
_library.gnutls_certificate_free_credentials)
676
certificate_free_credentials.argtypes = [
677
certificate_credentials_t]
678
certificate_free_credentials.restype = None
680
handshake_set_private_extensions = (
681
_library.gnutls_handshake_set_private_extensions)
682
handshake_set_private_extensions.argtypes = [session_t,
684
handshake_set_private_extensions.restype = None
686
credentials_set = _library.gnutls_credentials_set
687
credentials_set.argtypes = [session_t, credentials_type_t,
689
credentials_set.restype = _error_code
691
strerror = _library.gnutls_strerror
692
strerror.argtypes = [ctypes.c_int]
693
strerror.restype = ctypes.c_char_p
695
certificate_type_get = _library.gnutls_certificate_type_get
696
certificate_type_get.argtypes = [session_t]
697
certificate_type_get.restype = _error_code
699
certificate_get_peers = _library.gnutls_certificate_get_peers
700
certificate_get_peers.argtypes = [session_t,
701
ctypes.POINTER(ctypes.c_uint)]
702
certificate_get_peers.restype = ctypes.POINTER(datum_t)
704
global_set_log_level = _library.gnutls_global_set_log_level
705
global_set_log_level.argtypes = [ctypes.c_int]
706
global_set_log_level.restype = None
708
global_set_log_function = _library.gnutls_global_set_log_function
709
global_set_log_function.argtypes = [log_func]
710
global_set_log_function.restype = None
712
deinit = _library.gnutls_deinit
713
deinit.argtypes = [session_t]
714
deinit.restype = None
716
handshake = _library.gnutls_handshake
717
handshake.argtypes = [session_t]
718
handshake.restype = _error_code
719
handshake.errcheck = _retry_on_error
721
transport_set_ptr = _library.gnutls_transport_set_ptr
722
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
723
transport_set_ptr.restype = None
725
bye = _library.gnutls_bye
726
bye.argtypes = [session_t, close_request_t]
727
bye.restype = _error_code
728
bye.errcheck = _retry_on_error
730
check_version = _library.gnutls_check_version
731
check_version.argtypes = [ctypes.c_char_p]
732
check_version.restype = ctypes.c_char_p
734
# All the function declarations below are from gnutls/openpgp.h
736
openpgp_crt_init = _library.gnutls_openpgp_crt_init
737
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
738
openpgp_crt_init.restype = _error_code
740
openpgp_crt_import = _library.gnutls_openpgp_crt_import
741
openpgp_crt_import.argtypes = [openpgp_crt_t,
742
ctypes.POINTER(datum_t),
744
openpgp_crt_import.restype = _error_code
746
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
747
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
748
ctypes.POINTER(ctypes.c_uint)]
749
openpgp_crt_verify_self.restype = _error_code
751
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
752
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
753
openpgp_crt_deinit.restype = None
755
openpgp_crt_get_fingerprint = (
756
_library.gnutls_openpgp_crt_get_fingerprint)
757
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
761
openpgp_crt_get_fingerprint.restype = _error_code
763
# Remove non-public functions
764
del _error_code, _retry_on_error
765
# Create the global "gnutls" object, simulating a module
769
def call_pipe(connection, # : multiprocessing.Connection
770
func, *args, **kwargs):
771
"""This function is meant to be called by multiprocessing.Process
773
This function runs func(*args, **kwargs), and writes the resulting
774
return value on the provided multiprocessing.Connection.
776
connection.send(func(*args, **kwargs))
410
780
class Client(object):
411
781
"""A representation of a client host served by this server.
414
784
approved: bool(); 'None' if not yet approved/disapproved
415
785
approval_delay: datetime.timedelta(); Time to wait for approval
588
960
logger.info("Disabling client %s", self.name)
589
961
if getattr(self, "disable_initiator_tag", None) is not None:
590
gobject.source_remove(self.disable_initiator_tag)
962
GLib.source_remove(self.disable_initiator_tag)
591
963
self.disable_initiator_tag = None
592
964
self.expires = None
593
965
if getattr(self, "checker_initiator_tag", None) is not None:
594
gobject.source_remove(self.checker_initiator_tag)
966
GLib.source_remove(self.checker_initiator_tag)
595
967
self.checker_initiator_tag = None
596
968
self.stop_checker()
597
969
self.enabled = False
599
971
self.send_changedstate()
600
# Do not run this again if called by a gobject.timeout_add
972
# Do not run this again if called by a GLib.timeout_add
603
975
def __del__(self):
606
978
def init_checker(self):
607
979
# Schedule a new checker to be started an 'interval' from now,
608
980
# and every interval from then on.
609
981
if self.checker_initiator_tag is not None:
610
gobject.source_remove(self.checker_initiator_tag)
611
self.checker_initiator_tag = (gobject.timeout_add
613
.total_seconds() * 1000),
982
GLib.source_remove(self.checker_initiator_tag)
983
self.checker_initiator_tag = GLib.timeout_add(
984
int(self.interval.total_seconds() * 1000),
615
986
# Schedule a disable() when 'timeout' has passed
616
987
if self.disable_initiator_tag is not None:
617
gobject.source_remove(self.disable_initiator_tag)
618
self.disable_initiator_tag = (gobject.timeout_add
620
.total_seconds() * 1000),
988
GLib.source_remove(self.disable_initiator_tag)
989
self.disable_initiator_tag = GLib.timeout_add(
990
int(self.timeout.total_seconds() * 1000), self.disable)
622
991
# Also start a new checker *right now*.
623
992
self.start_checker()
625
def checker_callback(self, pid, condition, command):
994
def checker_callback(self, source, condition, connection,
626
996
"""The checker has completed, so take appropriate actions."""
627
997
self.checker_callback_tag = None
628
998
self.checker = None
629
if os.WIFEXITED(condition):
630
self.last_checker_status = os.WEXITSTATUS(condition)
999
# Read return code from connection (see call_pipe)
1000
returncode = connection.recv()
1004
self.last_checker_status = returncode
1005
self.last_checker_signal = None
631
1006
if self.last_checker_status == 0:
632
1007
logger.info("Checker for %(name)s succeeded",
634
1009
self.checked_ok()
636
logger.info("Checker for %(name)s failed",
1011
logger.info("Checker for %(name)s failed", vars(self))
639
1013
self.last_checker_status = -1
1014
self.last_checker_signal = -returncode
640
1015
logger.warning("Checker for %(name)s crashed?",
643
1019
def checked_ok(self):
644
1020
"""Assert that the client has been seen, alive and well."""
645
1021
self.last_checked_ok = datetime.datetime.utcnow()
646
1022
self.last_checker_status = 0
1023
self.last_checker_signal = None
647
1024
self.bump_timeout()
649
1026
def bump_timeout(self, timeout=None):
650
1027
"""Bump up the timeout for this client."""
651
1028
if timeout is None:
652
1029
timeout = self.timeout
653
1030
if self.disable_initiator_tag is not None:
654
gobject.source_remove(self.disable_initiator_tag)
1031
GLib.source_remove(self.disable_initiator_tag)
655
1032
self.disable_initiator_tag = None
656
1033
if getattr(self, "enabled", False):
657
self.disable_initiator_tag = (gobject.timeout_add
658
(int(timeout.total_seconds()
659
* 1000), self.disable))
1034
self.disable_initiator_tag = GLib.timeout_add(
1035
int(timeout.total_seconds() * 1000), self.disable)
660
1036
self.expires = datetime.datetime.utcnow() + timeout
662
1038
def need_approval(self):
663
1039
self.last_approval_request = datetime.datetime.utcnow()
665
1041
def start_checker(self):
666
1042
"""Start a new checker subprocess if one is not running.
668
1044
If a checker already exists, leave it running and do
670
1046
# The reason for not killing a running checker is that if we
675
1051
# checkers alone, the checker would have to take more time
676
1052
# 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:
684
except OSError as error:
685
if error.errno != errno.ECHILD:
689
logger.warning("Checker was a zombie")
690
gobject.source_remove(self.checker_callback_tag)
691
self.checker_callback(pid, status,
692
self.current_checker_command)
1055
if self.checker is not None and not self.checker.is_alive():
1056
logger.warning("Checker was not alive; joining")
693
1059
# Start a new checker if needed
694
1060
if self.checker is None:
695
1061
# Escape attributes for the shell
696
escaped_attrs = { attr:
697
re.escape(str(getattr(self, attr)))
698
for attr in self.runtime_expansions }
1063
attr: re.escape(str(getattr(self, attr)))
1064
for attr in self.runtime_expansions}
700
1066
command = self.checker_command % escaped_attrs
701
1067
except TypeError as error:
702
1068
logger.error('Could not format string "%s"',
703
self.checker_command, exc_info=error)
704
return True # Try again later
1069
self.checker_command,
1071
return True # Try again later
705
1072
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
# The exception is when not debugging but nevertheless
714
# running in the foreground; use the previously
717
if (not self.server_settings["debug"]
718
and self.server_settings["foreground"]):
719
popen_args.update({"stdout": wnull,
721
self.checker = subprocess.Popen(command,
725
except OSError as error:
726
logger.error("Failed to start subprocess",
729
self.checker_callback_tag = (gobject.child_watch_add
731
self.checker_callback,
733
# The checker may have completed before the gobject
734
# watch was added. Check for this.
736
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
737
except OSError as error:
738
if error.errno == errno.ECHILD:
739
# This should never happen
740
logger.error("Child process vanished",
745
gobject.source_remove(self.checker_callback_tag)
746
self.checker_callback(pid, status, command)
747
# Re-run this periodically if run by gobject.timeout_add
1073
logger.info("Starting checker %r for %s", command,
1075
# We don't need to redirect stdout and stderr, since
1076
# in normal mode, that is already done by daemon(),
1077
# and in debug mode we don't want to. (Stdin is
1078
# always replaced by /dev/null.)
1079
# The exception is when not debugging but nevertheless
1080
# running in the foreground; use the previously
1082
popen_args = {"close_fds": True,
1085
if (not self.server_settings["debug"]
1086
and self.server_settings["foreground"]):
1087
popen_args.update({"stdout": wnull,
1089
pipe = multiprocessing.Pipe(duplex=False)
1090
self.checker = multiprocessing.Process(
1092
args=(pipe[1], subprocess.call, command),
1094
self.checker.start()
1095
self.checker_callback_tag = GLib.io_add_watch(
1096
pipe[0].fileno(), GLib.IO_IN,
1097
self.checker_callback, pipe[0], command)
1098
# Re-run this periodically if run by GLib.timeout_add
750
1101
def stop_checker(self):
751
1102
"""Force the checker process, if any, to stop."""
752
1103
if self.checker_callback_tag:
753
gobject.source_remove(self.checker_callback_tag)
1104
GLib.source_remove(self.checker_callback_tag)
754
1105
self.checker_callback_tag = None
755
1106
if getattr(self, "checker", None) is None:
757
1108
logger.debug("Stopping checker for %(name)s", vars(self))
759
self.checker.terminate()
761
#if self.checker.poll() is None:
762
# self.checker.kill()
763
except OSError as error:
764
if error.errno != errno.ESRCH: # No such process
1109
self.checker.terminate()
766
1110
self.checker = None
769
def dbus_service_property(dbus_interface, signature="v",
770
access="readwrite", byte_arrays=False):
1113
def dbus_service_property(dbus_interface,
771
1117
"""Decorators for marking methods of a DBusObjectWithProperties to
772
1118
become properties on the D-Bus.
774
1120
The decorated method will be called with no arguments by "Get"
775
1121
and with one argument by "Set".
777
1123
The parameters, where they are supported, are the same as
778
1124
dbus.service.method, except there is only "signature", since the
779
1125
type from Get() and the type sent to Set() is the same.
853
class DBusObjectWithProperties(dbus.service.Object):
854
"""A D-Bus object with properties.
856
Classes inheriting from this can use the dbus_service_property
857
decorator to expose methods as D-Bus properties. It exposes the
858
standard Get(), Set(), and GetAll() methods on the D-Bus.
1208
class DBusObjectWithAnnotations(dbus.service.Object):
1209
"""A D-Bus object with annotations.
1211
Classes inheriting from this can use the dbus_annotations
1212
decorator to add annotations to methods or signals.
862
1216
def _is_dbus_thing(thing):
863
1217
"""Returns a function testing if an attribute is a D-Bus thing
865
1219
If called like _is_dbus_thing("method") it returns a function
866
1220
suitable for use as predicate to inspect.getmembers().
868
1222
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
871
1225
def _get_all_dbus_things(self, thing):
872
1226
"""Returns a generator of (name, attribute) pairs
874
return ((getattr(athing.__get__(self), "_dbus_name",
1228
return ((getattr(athing.__get__(self), "_dbus_name", name),
876
1229
athing.__get__(self))
877
1230
for cls in self.__class__.__mro__
878
1231
for name, athing in
879
inspect.getmembers(cls,
880
self._is_dbus_thing(thing)))
1232
inspect.getmembers(cls, self._is_dbus_thing(thing)))
1234
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1236
path_keyword='object_path',
1237
connection_keyword='connection')
1238
def Introspect(self, object_path, connection):
1239
"""Overloading of standard D-Bus method.
1241
Inserts annotation tags on methods and signals.
1243
xmlstring = dbus.service.Object.Introspect(self, object_path,
1246
document = xml.dom.minidom.parseString(xmlstring)
1248
for if_tag in document.getElementsByTagName("interface"):
1249
# Add annotation tags
1250
for typ in ("method", "signal"):
1251
for tag in if_tag.getElementsByTagName(typ):
1253
for name, prop in (self.
1254
_get_all_dbus_things(typ)):
1255
if (name == tag.getAttribute("name")
1256
and prop._dbus_interface
1257
== if_tag.getAttribute("name")):
1258
annots.update(getattr(
1259
prop, "_dbus_annotations", {}))
1260
for name, value in annots.items():
1261
ann_tag = document.createElement(
1263
ann_tag.setAttribute("name", name)
1264
ann_tag.setAttribute("value", value)
1265
tag.appendChild(ann_tag)
1266
# Add interface annotation tags
1267
for annotation, value in dict(
1268
itertools.chain.from_iterable(
1269
annotations().items()
1270
for name, annotations
1271
in self._get_all_dbus_things("interface")
1272
if name == if_tag.getAttribute("name")
1274
ann_tag = document.createElement("annotation")
1275
ann_tag.setAttribute("name", annotation)
1276
ann_tag.setAttribute("value", value)
1277
if_tag.appendChild(ann_tag)
1278
# Fix argument name for the Introspect method itself
1279
if (if_tag.getAttribute("name")
1280
== dbus.INTROSPECTABLE_IFACE):
1281
for cn in if_tag.getElementsByTagName("method"):
1282
if cn.getAttribute("name") == "Introspect":
1283
for arg in cn.getElementsByTagName("arg"):
1284
if (arg.getAttribute("direction")
1286
arg.setAttribute("name",
1288
xmlstring = document.toxml("utf-8")
1290
except (AttributeError, xml.dom.DOMException,
1291
xml.parsers.expat.ExpatError) as error:
1292
logger.error("Failed to override Introspection method",
1297
class DBusObjectWithProperties(DBusObjectWithAnnotations):
1298
"""A D-Bus object with properties.
1300
Classes inheriting from this can use the dbus_service_property
1301
decorator to expose methods as D-Bus properties. It exposes the
1302
standard Get(), Set(), and GetAll() methods on the D-Bus.
882
1305
def _get_dbus_property(self, interface_name, property_name):
883
1306
"""Returns a bound method if one exists which is a D-Bus
884
1307
property with the specified name and interface.
886
for cls in self.__class__.__mro__:
887
for name, value in (inspect.getmembers
889
self._is_dbus_thing("property"))):
1309
for cls in self.__class__.__mro__:
1310
for name, value in inspect.getmembers(
1311
cls, self._is_dbus_thing("property")):
890
1312
if (value._dbus_name == property_name
891
1313
and value._dbus_interface == interface_name):
892
1314
return value.__get__(self)
894
1316
# No such property
895
raise DBusPropertyNotFound(self.dbus_object_path + ":"
896
+ interface_name + "."
899
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
1317
raise DBusPropertyNotFound("{}:{}.{}".format(
1318
self.dbus_object_path, interface_name, property_name))
1321
def _get_all_interface_names(cls):
1322
"""Get a sequence of all interfaces supported by an object"""
1323
return (name for name in set(getattr(getattr(x, attr),
1324
"_dbus_interface", None)
1325
for x in (inspect.getmro(cls))
1327
if name is not None)
1329
@dbus.service.method(dbus.PROPERTIES_IFACE,
900
1331
out_signature="v")
901
1332
def Get(self, interface_name, property_name):
902
1333
"""Standard D-Bus property Get() method, see D-Bus standard.
987
1422
if prop._dbus_interface
988
1423
== if_tag.getAttribute("name")):
989
1424
if_tag.appendChild(tag)
990
# Add annotation tags
991
for typ in ("method", "signal", "property"):
992
for tag in if_tag.getElementsByTagName(typ):
994
for name, prop in (self.
995
_get_all_dbus_things(typ)):
996
if (name == tag.getAttribute("name")
997
and prop._dbus_interface
998
== if_tag.getAttribute("name")):
999
annots.update(getattr
1001
"_dbus_annotations",
1003
for name, value in annots.items():
1004
ann_tag = document.createElement(
1006
ann_tag.setAttribute("name", name)
1007
ann_tag.setAttribute("value", value)
1008
tag.appendChild(ann_tag)
1009
# Add interface annotation tags
1010
for annotation, value in dict(
1011
itertools.chain.from_iterable(
1012
annotations().items()
1013
for name, annotations in
1014
self._get_all_dbus_things("interface")
1015
if name == if_tag.getAttribute("name")
1017
ann_tag = document.createElement("annotation")
1018
ann_tag.setAttribute("name", annotation)
1019
ann_tag.setAttribute("value", value)
1020
if_tag.appendChild(ann_tag)
1425
# Add annotation tags for properties
1426
for tag in if_tag.getElementsByTagName("property"):
1428
for name, prop in self._get_all_dbus_things(
1430
if (name == tag.getAttribute("name")
1431
and prop._dbus_interface
1432
== if_tag.getAttribute("name")):
1433
annots.update(getattr(
1434
prop, "_dbus_annotations", {}))
1435
for name, value in annots.items():
1436
ann_tag = document.createElement(
1438
ann_tag.setAttribute("name", name)
1439
ann_tag.setAttribute("value", value)
1440
tag.appendChild(ann_tag)
1021
1441
# Add the names to the return values for the
1022
1442
# "org.freedesktop.DBus.Properties" methods
1023
1443
if (if_tag.getAttribute("name")
1041
1461
exc_info=error)
1042
1462
return xmlstring
1465
dbus.OBJECT_MANAGER_IFACE
1466
except AttributeError:
1467
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1470
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1471
"""A D-Bus object with an ObjectManager.
1473
Classes inheriting from this exposes the standard
1474
GetManagedObjects call and the InterfacesAdded and
1475
InterfacesRemoved signals on the standard
1476
"org.freedesktop.DBus.ObjectManager" interface.
1478
Note: No signals are sent automatically; they must be sent
1481
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1482
out_signature="a{oa{sa{sv}}}")
1483
def GetManagedObjects(self):
1484
"""This function must be overridden"""
1485
raise NotImplementedError()
1487
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1488
signature="oa{sa{sv}}")
1489
def InterfacesAdded(self, object_path, interfaces_and_properties):
1492
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1493
def InterfacesRemoved(self, object_path, interfaces):
1496
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1498
path_keyword='object_path',
1499
connection_keyword='connection')
1500
def Introspect(self, object_path, connection):
1501
"""Overloading of standard D-Bus method.
1503
Override return argument name of GetManagedObjects to be
1504
"objpath_interfaces_and_properties"
1506
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1510
document = xml.dom.minidom.parseString(xmlstring)
1512
for if_tag in document.getElementsByTagName("interface"):
1513
# Fix argument name for the GetManagedObjects method
1514
if (if_tag.getAttribute("name")
1515
== dbus.OBJECT_MANAGER_IFACE):
1516
for cn in if_tag.getElementsByTagName("method"):
1517
if (cn.getAttribute("name")
1518
== "GetManagedObjects"):
1519
for arg in cn.getElementsByTagName("arg"):
1520
if (arg.getAttribute("direction")
1524
"objpath_interfaces"
1526
xmlstring = document.toxml("utf-8")
1528
except (AttributeError, xml.dom.DOMException,
1529
xml.parsers.expat.ExpatError) as error:
1530
logger.error("Failed to override Introspection method",
1045
1535
def datetime_to_dbus(dt, variant_level=0):
1046
1536
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1048
return dbus.String("", variant_level = variant_level)
1049
return dbus.String(dt.isoformat(),
1050
variant_level=variant_level)
1538
return dbus.String("", variant_level=variant_level)
1539
return dbus.String(dt.isoformat(), variant_level=variant_level)
1053
1542
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1083
1573
# Ignore non-D-Bus attributes, and D-Bus attributes
1084
1574
# with the wrong interface name
1085
1575
if (not hasattr(attribute, "_dbus_interface")
1086
or not attribute._dbus_interface
1087
.startswith(orig_interface_name)):
1576
or not attribute._dbus_interface.startswith(
1577
orig_interface_name)):
1089
1579
# Create an alternate D-Bus interface name based on
1090
1580
# the current name
1091
alt_interface = (attribute._dbus_interface
1092
.replace(orig_interface_name,
1093
alt_interface_name))
1581
alt_interface = attribute._dbus_interface.replace(
1582
orig_interface_name, alt_interface_name)
1094
1583
interface_names.add(alt_interface)
1095
1584
# Is this a D-Bus signal?
1096
1585
if getattr(attribute, "_dbus_is_signal", False):
1097
1586
# Extract the original non-method undecorated
1098
1587
# function by black magic
1099
nonmethod_func = (dict(
1588
if sys.version_info.major == 2:
1589
nonmethod_func = (dict(
1100
1590
zip(attribute.func_code.co_freevars,
1101
attribute.__closure__))["func"]
1591
attribute.__closure__))
1592
["func"].cell_contents)
1594
nonmethod_func = (dict(
1595
zip(attribute.__code__.co_freevars,
1596
attribute.__closure__))
1597
["func"].cell_contents)
1103
1598
# Create a new, but exactly alike, function
1104
1599
# object, and decorate it to be a new D-Bus signal
1105
1600
# with the alternate D-Bus interface name
1106
new_function = (dbus.service.signal
1108
attribute._dbus_signature)
1109
(types.FunctionType(
1110
nonmethod_func.func_code,
1111
nonmethod_func.func_globals,
1112
nonmethod_func.func_name,
1113
nonmethod_func.func_defaults,
1114
nonmethod_func.func_closure)))
1601
new_function = copy_function(nonmethod_func)
1602
new_function = (dbus.service.signal(
1604
attribute._dbus_signature)(new_function))
1115
1605
# Copy annotations, if any
1117
new_function._dbus_annotations = (
1118
dict(attribute._dbus_annotations))
1607
new_function._dbus_annotations = dict(
1608
attribute._dbus_annotations)
1119
1609
except AttributeError:
1121
1612
# Define a creator of a function to call both the
1122
1613
# original and alternate functions, so both the
1123
1614
# original and alternate signals gets sent when
1264
1754
variant_level: D-Bus variant level. Default: 1
1266
1756
attrname = "_{}".format(dbus_name)
1267
1758
def setter(self, value):
1268
1759
if hasattr(self, "dbus_object_path"):
1269
1760
if (not hasattr(self, attrname) or
1270
1761
type_func(getattr(self, attrname, None))
1271
1762
!= type_func(value)):
1272
1763
if invalidate_only:
1273
self.PropertiesChanged(_interface,
1764
self.PropertiesChanged(
1765
_interface, dbus.Dictionary(),
1766
dbus.Array((dbus_name, )))
1278
dbus_value = transform_func(type_func(value),
1768
dbus_value = transform_func(
1770
variant_level=variant_level)
1281
1771
self.PropertyChanged(dbus.String(dbus_name),
1283
self.PropertiesChanged(_interface,
1285
dbus.String(dbus_name):
1286
dbus_value }), dbus.Array())
1773
self.PropertiesChanged(
1775
dbus.Dictionary({dbus.String(dbus_name):
1287
1778
setattr(self, attrname, value)
1289
1780
return property(lambda self: getattr(self, attrname), setter)
1291
1782
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1292
1783
approvals_pending = notifychangeproperty(dbus.Boolean,
1293
1784
"ApprovalPending",
1295
1786
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1296
1787
last_enabled = notifychangeproperty(datetime_to_dbus,
1298
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1299
type_func = lambda checker:
1300
checker is not None)
1789
checker = notifychangeproperty(
1790
dbus.Boolean, "CheckerRunning",
1791
type_func=lambda checker: checker is not None)
1301
1792
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1302
1793
"LastCheckedOK")
1303
1794
last_checker_status = notifychangeproperty(dbus.Int16,
1413
1903
server to mandos-client
1417
1907
# Rejected - signal
1418
1908
@dbus.service.signal(_interface, signature="s")
1419
1909
def Rejected(self, reason):
1423
1913
# NeedApproval - signal
1424
1914
@dbus.service.signal(_interface, signature="tb")
1425
1915
def NeedApproval(self, timeout, default):
1427
1917
return self.need_approval()
1431
1921
# Approve - method
1432
1922
@dbus.service.method(_interface, in_signature="b")
1433
1923
def Approve(self, value):
1434
1924
self.approve(value)
1436
1926
# CheckedOK - method
1437
1927
@dbus.service.method(_interface)
1438
1928
def CheckedOK(self):
1439
1929
self.checked_ok()
1441
1931
# Enable - method
1932
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1442
1933
@dbus.service.method(_interface)
1443
1934
def Enable(self):
1447
1938
# StartChecker - method
1939
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1448
1940
@dbus.service.method(_interface)
1449
1941
def StartChecker(self):
1451
1943
self.start_checker()
1453
1945
# Disable - method
1946
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1454
1947
@dbus.service.method(_interface)
1455
1948
def Disable(self):
1459
1952
# StopChecker - method
1953
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1460
1954
@dbus.service.method(_interface)
1461
1955
def StopChecker(self):
1462
1956
self.stop_checker()
1466
1960
# ApprovalPending - property
1467
1961
@dbus_service_property(_interface, signature="b", access="read")
1468
1962
def ApprovalPending_dbus_property(self):
1469
1963
return dbus.Boolean(bool(self.approvals_pending))
1471
1965
# ApprovedByDefault - property
1472
@dbus_service_property(_interface, signature="b",
1966
@dbus_service_property(_interface,
1473
1968
access="readwrite")
1474
1969
def ApprovedByDefault_dbus_property(self, value=None):
1475
1970
if value is None: # get
1476
1971
return dbus.Boolean(self.approved_by_default)
1477
1972
self.approved_by_default = bool(value)
1479
1974
# ApprovalDelay - property
1480
@dbus_service_property(_interface, signature="t",
1975
@dbus_service_property(_interface,
1481
1977
access="readwrite")
1482
1978
def ApprovalDelay_dbus_property(self, value=None):
1483
1979
if value is None: # get
1484
1980
return dbus.UInt64(self.approval_delay.total_seconds()
1486
1982
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1488
1984
# ApprovalDuration - property
1489
@dbus_service_property(_interface, signature="t",
1985
@dbus_service_property(_interface,
1490
1987
access="readwrite")
1491
1988
def ApprovalDuration_dbus_property(self, value=None):
1492
1989
if value is None: # get
1493
1990
return dbus.UInt64(self.approval_duration.total_seconds()
1495
1992
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1497
1994
# Name - property
1996
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1498
1997
@dbus_service_property(_interface, signature="s", access="read")
1499
1998
def Name_dbus_property(self):
1500
1999
return dbus.String(self.name)
1502
2001
# Fingerprint - property
2003
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1503
2004
@dbus_service_property(_interface, signature="s", access="read")
1504
2005
def Fingerprint_dbus_property(self):
1505
2006
return dbus.String(self.fingerprint)
1507
2008
# Host - property
1508
@dbus_service_property(_interface, signature="s",
2009
@dbus_service_property(_interface,
1509
2011
access="readwrite")
1510
2012
def Host_dbus_property(self, value=None):
1511
2013
if value is None: # get
1512
2014
return dbus.String(self.host)
1513
2015
self.host = str(value)
1515
2017
# Created - property
2019
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1516
2020
@dbus_service_property(_interface, signature="s", access="read")
1517
2021
def Created_dbus_property(self):
1518
2022
return datetime_to_dbus(self.created)
1520
2024
# LastEnabled - property
1521
2025
@dbus_service_property(_interface, signature="s", access="read")
1522
2026
def LastEnabled_dbus_property(self):
1523
2027
return datetime_to_dbus(self.last_enabled)
1525
2029
# Enabled - property
1526
@dbus_service_property(_interface, signature="b",
2030
@dbus_service_property(_interface,
1527
2032
access="readwrite")
1528
2033
def Enabled_dbus_property(self, value=None):
1529
2034
if value is None: # get
1670
2189
class ClientHandler(socketserver.BaseRequestHandler, object):
1671
2190
"""A class to handle client connections.
1673
2192
Instantiated once for each connection to handle it.
1674
2193
Note: This will run in its own forked process."""
1676
2195
def handle(self):
1677
2196
with contextlib.closing(self.server.child_pipe) as child_pipe:
1678
2197
logger.info("TCP connection from: %s",
1679
2198
str(self.client_address))
1680
2199
logger.debug("Pipe FD: %d",
1681
2200
self.server.child_pipe.fileno())
1683
session = (gnutls.connection
1684
.ClientSession(self.request,
1686
.X509Credentials()))
1688
# Note: gnutls.connection.X509Credentials is really a
1689
# generic GnuTLS certificate credentials object so long as
1690
# no X.509 keys are added to it. Therefore, we can use it
1691
# here despite using OpenPGP certificates.
1693
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1694
# "+AES-256-CBC", "+SHA1",
1695
# "+COMP-NULL", "+CTYPE-OPENPGP",
2202
session = gnutls.ClientSession(self.request)
2204
# priority = ':'.join(("NONE", "+VERS-TLS1.1",
2205
# "+AES-256-CBC", "+SHA1",
2206
# "+COMP-NULL", "+CTYPE-OPENPGP",
1697
2208
# Use a fallback default, since this MUST be set.
1698
2209
priority = self.server.gnutls_priority
1699
2210
if priority is None:
1700
2211
priority = "NORMAL"
1701
(gnutls.library.functions
1702
.gnutls_priority_set_direct(session._c_object,
2212
gnutls.priority_set_direct(session._c_object,
2213
priority.encode("utf-8"),
1705
2216
# Start communication using the Mandos protocol
1706
2217
# Get protocol number
1707
2218
line = self.request.makefile().readline()
1794
2304
delay -= time2 - time
1797
while sent_size < len(client.secret):
1799
sent = session.send(client.secret[sent_size:])
1800
except gnutls.errors.GNUTLSError as error:
1801
logger.warning("gnutls send failed",
1804
logger.debug("Sent: %d, remaining: %d",
1805
sent, len(client.secret)
1806
- (sent_size + sent))
2307
session.send(client.secret)
2308
except gnutls.Error as error:
2309
logger.warning("gnutls send failed",
1809
2313
logger.info("Sending secret to %s", client.name)
1810
2314
# bump the timeout using extended_timeout
1811
2315
client.bump_timeout(client.extended_timeout)
1812
2316
if self.server.use_dbus:
1813
2317
# Emit D-Bus signal
1814
2318
client.GotSecret()
1817
2321
if approval_required:
1818
2322
client.approvals_pending -= 1
1821
except gnutls.errors.GNUTLSError as error:
2325
except gnutls.Error as error:
1822
2326
logger.warning("GnuTLS bye failed",
1823
2327
exc_info=error)
1826
2330
def peer_certificate(session):
1827
2331
"Return the peer's OpenPGP certificate as a bytestring"
1828
2332
# If not an OpenPGP certificate...
1829
if (gnutls.library.functions
1830
.gnutls_certificate_type_get(session._c_object)
1831
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1832
# ...do the normal thing
1833
return session.peer_certificate
2333
if (gnutls.certificate_type_get(session._c_object)
2334
!= gnutls.CRT_OPENPGP):
2335
# ...return invalid data
1834
2337
list_size = ctypes.c_uint(1)
1835
cert_list = (gnutls.library.functions
1836
.gnutls_certificate_get_peers
2338
cert_list = (gnutls.certificate_get_peers
1837
2339
(session._c_object, ctypes.byref(list_size)))
1838
2340
if not bool(cert_list) and list_size.value != 0:
1839
raise gnutls.errors.GNUTLSError("error getting peer"
2341
raise gnutls.Error("error getting peer certificate")
1841
2342
if list_size.value == 0:
1843
2344
cert = cert_list[0]
1844
2345
return ctypes.string_at(cert.data, cert.size)
1847
2348
def fingerprint(openpgp):
1848
2349
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1849
2350
# New GnuTLS "datum" with the OpenPGP public key
1850
datum = (gnutls.library.types
1851
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1854
ctypes.c_uint(len(openpgp))))
2351
datum = gnutls.datum_t(
2352
ctypes.cast(ctypes.c_char_p(openpgp),
2353
ctypes.POINTER(ctypes.c_ubyte)),
2354
ctypes.c_uint(len(openpgp)))
1855
2355
# New empty GnuTLS certificate
1856
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1857
(gnutls.library.functions
1858
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
2356
crt = gnutls.openpgp_crt_t()
2357
gnutls.openpgp_crt_init(ctypes.byref(crt))
1859
2358
# Import the OpenPGP public key into the certificate
1860
(gnutls.library.functions
1861
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1862
gnutls.library.constants
1863
.GNUTLS_OPENPGP_FMT_RAW))
2359
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2360
gnutls.OPENPGP_FMT_RAW)
1864
2361
# Verify the self signature in the key
1865
2362
crtverify = ctypes.c_uint()
1866
(gnutls.library.functions
1867
.gnutls_openpgp_crt_verify_self(crt, 0,
1868
ctypes.byref(crtverify)))
2363
gnutls.openpgp_crt_verify_self(crt, 0,
2364
ctypes.byref(crtverify))
1869
2365
if crtverify.value != 0:
1870
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1871
raise (gnutls.errors.CertificateSecurityError
2366
gnutls.openpgp_crt_deinit(crt)
2367
raise gnutls.CertificateSecurityError("Verify failed")
1873
2368
# New buffer for the fingerprint
1874
2369
buf = ctypes.create_string_buffer(20)
1875
2370
buf_len = ctypes.c_size_t()
1876
2371
# Get the fingerprint from the certificate into the buffer
1877
(gnutls.library.functions
1878
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1879
ctypes.byref(buf_len)))
2372
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2373
ctypes.byref(buf_len))
1880
2374
# Deinit the certificate
1881
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2375
gnutls.openpgp_crt_deinit(crt)
1882
2376
# Convert the buffer to a Python bytestring
1883
2377
fpr = ctypes.string_at(buf, buf_len.value)
1884
2378
# Convert the bytestring to hexadecimal notation
1967
2467
# socket_wrapper(), if socketfd was set.
1968
2468
socketserver.TCPServer.__init__(self, server_address,
1969
2469
RequestHandlerClass)
1971
2471
def server_bind(self):
1972
2472
"""This overrides the normal server_bind() function
1973
2473
to bind to an interface if one was specified, and also NOT to
1974
2474
bind to an address or port if they were not specified."""
2475
global SO_BINDTODEVICE
1975
2476
if self.interface is not None:
1976
2477
if SO_BINDTODEVICE is None:
1977
logger.error("SO_BINDTODEVICE does not exist;"
1978
" cannot bind to interface %s",
1982
self.socket.setsockopt(socket.SOL_SOCKET,
1984
(self.interface + "\0")
1986
except socket.error as error:
1987
if error.errno == errno.EPERM:
1988
logger.error("No permission to bind to"
1989
" interface %s", self.interface)
1990
elif error.errno == errno.ENOPROTOOPT:
1991
logger.error("SO_BINDTODEVICE not available;"
1992
" cannot bind to interface %s",
1994
elif error.errno == errno.ENODEV:
1995
logger.error("Interface %s does not exist,"
1996
" cannot bind", self.interface)
2478
# Fall back to a hard-coded value which seems to be
2480
logger.warning("SO_BINDTODEVICE not found, trying 25")
2481
SO_BINDTODEVICE = 25
2483
self.socket.setsockopt(
2484
socket.SOL_SOCKET, SO_BINDTODEVICE,
2485
(self.interface + "\0").encode("utf-8"))
2486
except socket.error as error:
2487
if error.errno == errno.EPERM:
2488
logger.error("No permission to bind to"
2489
" interface %s", self.interface)
2490
elif error.errno == errno.ENOPROTOOPT:
2491
logger.error("SO_BINDTODEVICE not available;"
2492
" cannot bind to interface %s",
2494
elif error.errno == errno.ENODEV:
2495
logger.error("Interface %s does not exist,"
2496
" cannot bind", self.interface)
1999
2499
# Only bind(2) the socket if we really need to.
2000
2500
if self.server_address[0] or self.server_address[1]:
2001
2501
if not self.server_address[0]:
2002
2502
if self.address_family == socket.AF_INET6:
2003
any_address = "::" # in6addr_any
2503
any_address = "::" # in6addr_any
2005
any_address = "0.0.0.0" # INADDR_ANY
2505
any_address = "0.0.0.0" # INADDR_ANY
2006
2506
self.server_address = (any_address,
2007
2507
self.server_address[1])
2008
2508
elif not self.server_address[1]:
2009
self.server_address = (self.server_address[0],
2509
self.server_address = (self.server_address[0], 0)
2011
2510
# if self.interface:
2012
2511
# self.server_address = (self.server_address[0],
2142
2649
>>> rfc3339_duration_to_delta("P1DT3M20S")
2143
2650
datetime.timedelta(1, 200)
2146
2653
# Parsing an RFC 3339 duration with regular expressions is not
2147
2654
# possible - there would have to be multiple places for the same
2148
2655
# values, like seconds. The current code, while more esoteric, is
2149
2656
# cleaner without depending on a parsing library. If Python had a
2150
2657
# built-in library for parsing we would use it, but we'd like to
2151
2658
# avoid excessive use of external libraries.
2153
2660
# New type for defining tokens, syntax, and semantics all-in-one
2154
Token = collections.namedtuple("Token",
2155
("regexp", # To match token; if
2156
# "value" is not None,
2157
# must have a "group"
2159
"value", # datetime.timedelta or
2161
"followers")) # Tokens valid after
2661
Token = collections.namedtuple("Token", (
2662
"regexp", # To match token; if "value" is not None, must have
2663
# a "group" containing digits
2664
"value", # datetime.timedelta or None
2665
"followers")) # Tokens valid after this token
2163
2666
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2164
2667
# the "duration" ABNF definition in RFC 3339, Appendix A.
2165
2668
token_end = Token(re.compile(r"$"), None, frozenset())
2166
2669
token_second = Token(re.compile(r"(\d+)S"),
2167
2670
datetime.timedelta(seconds=1),
2168
frozenset((token_end,)))
2671
frozenset((token_end, )))
2169
2672
token_minute = Token(re.compile(r"(\d+)M"),
2170
2673
datetime.timedelta(minutes=1),
2171
2674
frozenset((token_second, token_end)))
2444
2950
level = getattr(logging, debuglevel.upper())
2445
2951
initlogger(debug, level)
2447
2953
if server_settings["servicename"] != "Mandos":
2448
syslogger.setFormatter(logging.Formatter
2449
('Mandos ({}) [%(process)d]:'
2450
' %(levelname)s: %(message)s'
2451
.format(server_settings
2954
syslogger.setFormatter(
2955
logging.Formatter('Mandos ({}) [%(process)d]:'
2956
' %(levelname)s: %(message)s'.format(
2957
server_settings["servicename"])))
2454
2959
# Parse config file with clients
2455
2960
client_config = configparser.SafeConfigParser(Client
2456
2961
.client_defaults)
2457
2962
client_config.read(os.path.join(server_settings["configdir"],
2458
2963
"clients.conf"))
2460
2965
global mandos_dbus_service
2461
2966
mandos_dbus_service = None
2463
2968
socketfd = None
2464
2969
if server_settings["socket"] != "":
2465
2970
socketfd = server_settings["socket"]
2466
tcp_server = MandosServer((server_settings["address"],
2467
server_settings["port"]),
2469
interface=(server_settings["interface"]
2473
server_settings["priority"],
2971
tcp_server = MandosServer(
2972
(server_settings["address"], server_settings["port"]),
2974
interface=(server_settings["interface"] or None),
2976
gnutls_priority=server_settings["priority"],
2476
2979
if not foreground:
2477
2980
pidfilename = "/run/mandos.pid"
2478
2981
if not os.path.isdir("/run/."):
2479
2982
pidfilename = "/var/run/mandos.pid"
2482
pidfile = open(pidfilename, "w")
2985
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
2483
2986
except IOError as e:
2484
2987
logger.error("Could not open file %r", pidfilename,
2487
for name in ("_mandos", "mandos", "nobody"):
2990
for name, group in (("_mandos", "_mandos"),
2991
("mandos", "mandos"),
2992
("nobody", "nogroup")):
2489
2994
uid = pwd.getpwnam(name).pw_uid
2490
gid = pwd.getpwnam(name).pw_gid
2995
gid = pwd.getpwnam(group).pw_gid
2492
2997
except KeyError:
3006
logger.debug("Did setuid/setgid to {}:{}".format(uid,
2500
3008
except OSError as error:
3009
logger.warning("Failed to setuid/setgid to {}:{}: {}"
3010
.format(uid, gid, os.strerror(error.errno)))
2501
3011
if error.errno != errno.EPERM:
2505
3015
# Enable all possible GnuTLS debugging
2507
3017
# "Use a log level over 10 to enable all debugging options."
2508
3018
# - GnuTLS manual
2509
gnutls.library.functions.gnutls_global_set_log_level(11)
2511
@gnutls.library.types.gnutls_log_func
3019
gnutls.global_set_log_level(11)
2512
3022
def debug_gnutls(level, string):
2513
3023
logger.debug("GnuTLS: %s", string[:-1])
2515
(gnutls.library.functions
2516
.gnutls_global_set_log_function(debug_gnutls))
3025
gnutls.global_set_log_function(debug_gnutls)
2518
3027
# Redirect stdin so all checkers get /dev/null
2519
3028
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2520
3029
os.dup2(null, sys.stdin.fileno())
2524
3033
# Need to fork before connecting to D-Bus
2525
3034
if not foreground:
2526
3035
# Close all input and output, do double fork, etc.
2529
# multiprocessing will use threads, so before we use gobject we
2530
# need to inform gobject that threads will be used.
2531
gobject.threads_init()
3038
# multiprocessing will use threads, so before we use GLib we need
3039
# to inform GLib that threads will be used.
2533
3042
global main_loop
2534
3043
# From the Avahi example code
2535
3044
DBusGMainLoop(set_as_default=True)
2536
main_loop = gobject.MainLoop()
3045
main_loop = GLib.MainLoop()
2537
3046
bus = dbus.SystemBus()
2538
3047
# End of Avahi example code
2541
3050
bus_name = dbus.service.BusName("se.recompile.Mandos",
2542
bus, do_not_queue=True)
2543
old_bus_name = (dbus.service.BusName
2544
("se.bsnet.fukt.Mandos", bus,
2546
except dbus.exceptions.NameExistsException as e:
3053
old_bus_name = dbus.service.BusName(
3054
"se.bsnet.fukt.Mandos", bus,
3056
except dbus.exceptions.DBusException as e:
2547
3057
logger.error("Disabling D-Bus:", exc_info=e)
2548
3058
use_dbus = False
2549
3059
server_settings["use_dbus"] = False
2550
3060
tcp_server.use_dbus = False
2552
3062
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2553
service = AvahiServiceToSyslog(name =
2554
server_settings["servicename"],
2555
servicetype = "_mandos._tcp",
2556
protocol = protocol, bus = bus)
3063
service = AvahiServiceToSyslog(
3064
name=server_settings["servicename"],
3065
servicetype="_mandos._tcp",
2557
3068
if server_settings["interface"]:
2558
service.interface = (if_nametoindex
2559
(server_settings["interface"]
3069
service.interface = if_nametoindex(
3070
server_settings["interface"].encode("utf-8"))
2562
3072
global multiprocessing_manager
2563
3073
multiprocessing_manager = multiprocessing.Manager()
2565
3075
client_class = Client
2567
client_class = functools.partial(ClientDBus, bus = bus)
3077
client_class = functools.partial(ClientDBus, bus=bus)
2569
3079
client_settings = Client.config_parser(client_config)
2570
3080
old_client_settings = {}
2571
3081
clients_data = {}
2573
3083
# This is used to redirect stdout and stderr for checker processes
2575
wnull = open(os.devnull, "w") # A writable /dev/null
3085
wnull = open(os.devnull, "w") # A writable /dev/null
2576
3086
# Only used if server is running in foreground but not in debug
2578
3088
if debug or not foreground:
2581
3091
# Get client data and settings from last running state.
2582
3092
if server_settings["restore"]:
2584
3094
with open(stored_state_path, "rb") as stored_state:
2585
clients_data, old_client_settings = (pickle.load
3095
if sys.version_info.major == 2:
3096
clients_data, old_client_settings = pickle.load(
3099
bytes_clients_data, bytes_old_client_settings = (
3100
pickle.load(stored_state, encoding="bytes"))
3101
# Fix bytes to strings
3104
clients_data = {(key.decode("utf-8")
3105
if isinstance(key, bytes)
3108
bytes_clients_data.items()}
3109
del bytes_clients_data
3110
for key in clients_data:
3111
value = {(k.decode("utf-8")
3112
if isinstance(k, bytes) else k): v
3114
clients_data[key].items()}
3115
clients_data[key] = value
3117
value["client_structure"] = [
3119
if isinstance(s, bytes)
3121
value["client_structure"]]
3123
for k in ("name", "host"):
3124
if isinstance(value[k], bytes):
3125
value[k] = value[k].decode("utf-8")
3126
# old_client_settings
3128
old_client_settings = {
3129
(key.decode("utf-8")
3130
if isinstance(key, bytes)
3133
bytes_old_client_settings.items()}
3134
del bytes_old_client_settings
3136
for value in old_client_settings.values():
3137
if isinstance(value["host"], bytes):
3138
value["host"] = (value["host"]
2587
3140
os.remove(stored_state_path)
2588
3141
except IOError as e:
2589
3142
if e.errno == errno.ENOENT:
2590
logger.warning("Could not load persistent state: {}"
2591
.format(os.strerror(e.errno)))
3143
logger.warning("Could not load persistent state:"
3144
" {}".format(os.strerror(e.errno)))
2593
3146
logger.critical("Could not load persistent state:",
2596
3149
except EOFError as e:
2597
3150
logger.warning("Could not load persistent state: "
2598
"EOFError:", exc_info=e)
2600
3154
with PGPEngine() as pgp:
2601
3155
for client_name, client in clients_data.items():
2602
3156
# Skip removed clients
2603
3157
if client_name not in client_settings:
2606
3160
# Decide which value to use after restoring saved state.
2607
3161
# We have three different values: Old config file,
2608
3162
# new config file, and saved state.
2666
3220
for client_name in (set(client_settings)
2667
3221
- set(old_client_settings)):
2668
3222
clients_data[client_name] = client_settings[client_name]
2670
3224
# Create all client objects
2671
3225
for client_name, client in clients_data.items():
2672
3226
tcp_server.clients[client_name] = client_class(
2673
name = client_name, settings = client,
2674
server_settings = server_settings)
3229
server_settings=server_settings)
2676
3231
if not tcp_server.clients:
2677
3232
logger.warning("No clients defined")
2679
3234
if not foreground:
2680
3235
if pidfile is not None:
2684
pidfile.write("{}\n".format(pid).encode("utf-8"))
3239
print(pid, file=pidfile)
2685
3240
except IOError:
2686
3241
logger.error("Could not write to file %r with PID %d",
2687
3242
pidfilename, pid)
2689
3244
del pidfilename
2691
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2692
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
3246
for termsig in (signal.SIGHUP, signal.SIGTERM):
3247
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3248
lambda: main_loop.quit() and False)
2695
@alternate_dbus_interfaces({"se.recompile.Mandos":
2696
"se.bsnet.fukt.Mandos"})
2697
class MandosDBusService(DBusObjectWithProperties):
3252
@alternate_dbus_interfaces(
3253
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3254
class MandosDBusService(DBusObjectWithObjectManager):
2698
3255
"""A D-Bus proxy object"""
2699
3257
def __init__(self):
2700
3258
dbus.service.Object.__init__(self, bus, "/")
2701
3260
_interface = "se.recompile.Mandos"
2703
@dbus_interface_annotations(_interface)
2705
return { "org.freedesktop.DBus.Property"
2706
".EmitsChangedSignal":
2709
3262
@dbus.service.signal(_interface, signature="o")
2710
3263
def ClientAdded(self, objpath):
2714
3267
@dbus.service.signal(_interface, signature="ss")
2715
3268
def ClientNotFound(self, fingerprint, address):
3272
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
2719
3274
@dbus.service.signal(_interface, signature="os")
2720
3275
def ClientRemoved(self, objpath, name):
3279
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
2724
3281
@dbus.service.method(_interface, out_signature="ao")
2725
3282
def GetAllClients(self):
2727
return dbus.Array(c.dbus_object_path
2729
tcp_server.clients.itervalues())
3284
return dbus.Array(c.dbus_object_path for c in
3285
tcp_server.clients.values())
3287
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
2731
3289
@dbus.service.method(_interface,
2732
3290
out_signature="a{oa{sv}}")
2733
3291
def GetAllClientsWithProperties(self):
2735
3293
return dbus.Dictionary(
2736
{ c.dbus_object_path: c.GetAll("")
2737
for c in tcp_server.clients.itervalues() },
3294
{c.dbus_object_path: c.GetAll(
3295
"se.recompile.Mandos.Client")
3296
for c in tcp_server.clients.values()},
2738
3297
signature="oa{sv}")
2740
3299
@dbus.service.method(_interface, in_signature="o")
2741
3300
def RemoveClient(self, object_path):
2743
for c in tcp_server.clients.itervalues():
3302
for c in tcp_server.clients.values():
2744
3303
if c.dbus_object_path == object_path:
2745
3304
del tcp_server.clients[c.name]
2746
3305
c.remove_from_connection()
2747
# Don't signal anything except ClientRemoved
3306
# Don't signal the disabling
2748
3307
c.disable(quiet=True)
2750
self.ClientRemoved(object_path, c.name)
3308
# Emit D-Bus signal for removal
3309
self.client_removed_signal(c)
2752
3311
raise KeyError(object_path)
3315
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3316
out_signature="a{oa{sa{sv}}}")
3317
def GetManagedObjects(self):
3319
return dbus.Dictionary(
3320
{client.dbus_object_path:
3322
{interface: client.GetAll(interface)
3324
client._get_all_interface_names()})
3325
for client in tcp_server.clients.values()})
3327
def client_added_signal(self, client):
3328
"""Send the new standard signal and the old signal"""
3330
# New standard signal
3331
self.InterfacesAdded(
3332
client.dbus_object_path,
3334
{interface: client.GetAll(interface)
3336
client._get_all_interface_names()}))
3338
self.ClientAdded(client.dbus_object_path)
3340
def client_removed_signal(self, client):
3341
"""Send the new standard signal and the old signal"""
3343
# New standard signal
3344
self.InterfacesRemoved(
3345
client.dbus_object_path,
3346
client._get_all_interface_names())
3348
self.ClientRemoved(client.dbus_object_path,
2756
3351
mandos_dbus_service = MandosDBusService()
3353
# Save modules to variables to exempt the modules from being
3354
# unloaded before the function registered with atexit() is run.
3355
mp = multiprocessing
2759
3359
"Cleanup function; run on exit"
2761
3361
service.cleanup()
2763
multiprocessing.active_children()
3363
mp.active_children()
2765
3365
if not (tcp_server.clients or client_settings):
2768
3368
# Store client before exiting. Secrets are encrypted with key
2769
3369
# based on what config file has. If config file is
2770
3370
# removed/edited, old secret will thus be unrecovable.
2772
3372
with PGPEngine() as pgp:
2773
for client in tcp_server.clients.itervalues():
3373
for client in tcp_server.clients.values():
2774
3374
key = client_settings[client.name]["secret"]
2775
3375
client.encrypted_secret = pgp.encrypt(client.secret,
2777
3377
client_dict = {}
2779
3379
# A list of attributes that can not be pickled
2781
exclude = { "bus", "changedstate", "secret",
2782
"checker", "server_settings" }
2783
for name, typ in (inspect.getmembers
2784
(dbus.service.Object)):
3381
exclude = {"bus", "changedstate", "secret",
3382
"checker", "server_settings"}
3383
for name, typ in inspect.getmembers(dbus.service
2785
3385
exclude.add(name)
2787
3387
client_dict["encrypted_secret"] = (client
2788
3388
.encrypted_secret)
2789
3389
for attr in client.client_structure:
2790
3390
if attr not in exclude:
2791
3391
client_dict[attr] = getattr(client, attr)
2793
3393
clients[client.name] = client_dict
2794
3394
del client_settings[client.name]["secret"]
2797
with (tempfile.NamedTemporaryFile
2798
(mode='wb', suffix=".pickle", prefix='clients-',
2799
dir=os.path.dirname(stored_state_path),
2800
delete=False)) as stored_state:
2801
pickle.dump((clients, client_settings), stored_state)
2802
tempname=stored_state.name
3397
with tempfile.NamedTemporaryFile(
3401
dir=os.path.dirname(stored_state_path),
3402
delete=False) as stored_state:
3403
pickle.dump((clients, client_settings), stored_state,
3405
tempname = stored_state.name
2803
3406
os.rename(tempname, stored_state_path)
2804
3407
except (IOError, OSError) as e: