180
240
.replace(b"\n", b"\\n")
181
241
.replace(b"\0", b"\\x00"))
184
244
def encrypt(self, data, password):
185
245
passphrase = self.password_encode(password)
186
with tempfile.NamedTemporaryFile(dir=self.tempdir
246
with tempfile.NamedTemporaryFile(
247
dir=self.tempdir) as passfile:
188
248
passfile.write(passphrase)
190
proc = subprocess.Popen(['gpg', '--symmetric',
250
proc = subprocess.Popen([self.gpg, '--symmetric',
191
251
'--passphrase-file',
193
253
+ self.gnupgargs,
194
stdin = subprocess.PIPE,
195
stdout = subprocess.PIPE,
196
stderr = subprocess.PIPE)
197
ciphertext, err = proc.communicate(input = data)
254
stdin=subprocess.PIPE,
255
stdout=subprocess.PIPE,
256
stderr=subprocess.PIPE)
257
ciphertext, err = proc.communicate(input=data)
198
258
if proc.returncode != 0:
199
259
raise PGPError(err)
200
260
return ciphertext
202
262
def decrypt(self, data, password):
203
263
passphrase = self.password_encode(password)
204
with tempfile.NamedTemporaryFile(dir = self.tempdir
264
with tempfile.NamedTemporaryFile(
265
dir=self.tempdir) as passfile:
206
266
passfile.write(passphrase)
208
proc = subprocess.Popen(['gpg', '--decrypt',
268
proc = subprocess.Popen([self.gpg, '--decrypt',
209
269
'--passphrase-file',
211
271
+ self.gnupgargs,
212
stdin = subprocess.PIPE,
213
stdout = subprocess.PIPE,
214
stderr = subprocess.PIPE)
215
decrypted_plaintext, err = proc.communicate(input
272
stdin=subprocess.PIPE,
273
stdout=subprocess.PIPE,
274
stderr=subprocess.PIPE)
275
decrypted_plaintext, err = proc.communicate(input=data)
217
276
if proc.returncode != 0:
218
277
raise PGPError(err)
219
278
return decrypted_plaintext
281
# Pretend that we have an Avahi module
283
"""This isn't so much a class as it is a module-like namespace."""
284
IF_UNSPEC = -1 # avahi-common/address.h
285
PROTO_UNSPEC = -1 # avahi-common/address.h
286
PROTO_INET = 0 # avahi-common/address.h
287
PROTO_INET6 = 1 # avahi-common/address.h
288
DBUS_NAME = "org.freedesktop.Avahi"
289
DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"
290
DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"
291
DBUS_PATH_SERVER = "/"
294
def string_array_to_txt_array(t):
295
return dbus.Array((dbus.ByteArray(s.encode("utf-8"))
296
for s in t), signature="ay")
297
ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h
298
ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h
299
ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h
300
SERVER_INVALID = 0 # avahi-common/defs.h
301
SERVER_REGISTERING = 1 # avahi-common/defs.h
302
SERVER_RUNNING = 2 # avahi-common/defs.h
303
SERVER_COLLISION = 3 # avahi-common/defs.h
304
SERVER_FAILURE = 4 # avahi-common/defs.h
222
307
class AvahiError(Exception):
223
308
def __init__(self, value, *args, **kwargs):
224
309
self.value = value
225
310
return super(AvahiError, self).__init__(value, *args,
228
314
class AvahiServiceError(AvahiError):
231
318
class AvahiGroupError(AvahiError):
235
322
class AvahiService(object):
236
323
"""An Avahi (Zeroconf) service.
239
326
interface: integer; avahi.IF_UNSPEC or an interface index.
240
327
Used to optionally bind to the specified interface.
383
492
follow_name_owner_changes=True),
384
493
avahi.DBUS_INTERFACE_SERVER)
385
494
self.server.connect_to_signal("StateChanged",
386
self.server_state_changed)
495
self.server_state_changed)
387
496
self.server_state_changed(self.server.GetState())
390
499
class AvahiServiceToSyslog(AvahiService):
500
def rename(self, *args, **kwargs):
392
501
"""Add the new name to the syslog messages"""
393
ret = AvahiService.rename(self)
394
syslogger.setFormatter(logging.Formatter
395
('Mandos ({}) [%(process)d]:'
396
' %(levelname)s: %(message)s'
502
ret = super(AvahiServiceToSyslog, self).rename(*args, **kwargs)
503
syslogger.setFormatter(logging.Formatter(
504
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
509
# Pretend that we have a GnuTLS module
510
class gnutls(object):
511
"""This isn't so much a class as it is a module-like namespace."""
513
library = ctypes.util.find_library("gnutls")
515
library = ctypes.util.find_library("gnutls-deb0")
516
_library = ctypes.cdll.LoadLibrary(library)
519
# Unless otherwise indicated, the constants and types below are
520
# all from the gnutls/gnutls.h C header file.
531
E_NO_CERTIFICATE_FOUND = -49
536
KEYID_USE_SHA256 = 1 # gnutls/x509.h
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
def __init__(self, message=None, code=None, args=()):
566
# Default usage is by a message string, but if a return
567
# code is passed, convert it to a string with
570
if message is None and code is not None:
571
message = gnutls.strerror(code)
572
return super(gnutls.Error, self).__init__(
575
class CertificateSecurityError(Error):
579
class Credentials(object):
581
self._c_object = gnutls.certificate_credentials_t()
582
gnutls.certificate_allocate_credentials(
583
ctypes.byref(self._c_object))
584
self.type = gnutls.CRD_CERTIFICATE
587
gnutls.certificate_free_credentials(self._c_object)
589
class ClientSession(object):
590
def __init__(self, socket, credentials=None):
591
self._c_object = gnutls.session_t()
592
gnutls_flags = gnutls.CLIENT
593
if gnutls.check_version(b"3.5.6"):
594
gnutls_flags |= gnutls.NO_TICKETS
596
gnutls_flags |= gnutls.ENABLE_RAWPK
597
gnutls.init(ctypes.byref(self._c_object), gnutls_flags)
599
gnutls.set_default_priority(self._c_object)
600
gnutls.transport_set_ptr(self._c_object, socket.fileno())
601
gnutls.handshake_set_private_extensions(self._c_object,
604
if credentials is None:
605
credentials = gnutls.Credentials()
606
gnutls.credentials_set(self._c_object, credentials.type,
607
ctypes.cast(credentials._c_object,
609
self.credentials = credentials
612
gnutls.deinit(self._c_object)
615
return gnutls.handshake(self._c_object)
617
def send(self, data):
621
data_len -= gnutls.record_send(self._c_object,
626
return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
628
# Error handling functions
629
def _error_code(result):
630
"""A function to raise exceptions on errors, suitable
631
for the 'restype' attribute on ctypes functions"""
634
if result == gnutls.E_NO_CERTIFICATE_FOUND:
635
raise gnutls.CertificateSecurityError(code=result)
636
raise gnutls.Error(code=result)
638
def _retry_on_error(result, func, arguments):
639
"""A function to retry on some errors, suitable
640
for the 'errcheck' attribute on ctypes functions"""
642
if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
643
return _error_code(result)
644
result = func(*arguments)
647
# Unless otherwise indicated, the function declarations below are
648
# all from the gnutls/gnutls.h C header file.
651
priority_set_direct = _library.gnutls_priority_set_direct
652
priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
653
ctypes.POINTER(ctypes.c_char_p)]
654
priority_set_direct.restype = _error_code
656
init = _library.gnutls_init
657
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
658
init.restype = _error_code
660
set_default_priority = _library.gnutls_set_default_priority
661
set_default_priority.argtypes = [session_t]
662
set_default_priority.restype = _error_code
664
record_send = _library.gnutls_record_send
665
record_send.argtypes = [session_t, ctypes.c_void_p,
667
record_send.restype = ctypes.c_ssize_t
668
record_send.errcheck = _retry_on_error
670
certificate_allocate_credentials = (
671
_library.gnutls_certificate_allocate_credentials)
672
certificate_allocate_credentials.argtypes = [
673
ctypes.POINTER(certificate_credentials_t)]
674
certificate_allocate_credentials.restype = _error_code
676
certificate_free_credentials = (
677
_library.gnutls_certificate_free_credentials)
678
certificate_free_credentials.argtypes = [
679
certificate_credentials_t]
680
certificate_free_credentials.restype = None
682
handshake_set_private_extensions = (
683
_library.gnutls_handshake_set_private_extensions)
684
handshake_set_private_extensions.argtypes = [session_t,
686
handshake_set_private_extensions.restype = None
688
credentials_set = _library.gnutls_credentials_set
689
credentials_set.argtypes = [session_t, credentials_type_t,
691
credentials_set.restype = _error_code
693
strerror = _library.gnutls_strerror
694
strerror.argtypes = [ctypes.c_int]
695
strerror.restype = ctypes.c_char_p
697
certificate_type_get = _library.gnutls_certificate_type_get
698
certificate_type_get.argtypes = [session_t]
699
certificate_type_get.restype = _error_code
701
certificate_get_peers = _library.gnutls_certificate_get_peers
702
certificate_get_peers.argtypes = [session_t,
703
ctypes.POINTER(ctypes.c_uint)]
704
certificate_get_peers.restype = ctypes.POINTER(datum_t)
706
global_set_log_level = _library.gnutls_global_set_log_level
707
global_set_log_level.argtypes = [ctypes.c_int]
708
global_set_log_level.restype = None
710
global_set_log_function = _library.gnutls_global_set_log_function
711
global_set_log_function.argtypes = [log_func]
712
global_set_log_function.restype = None
714
deinit = _library.gnutls_deinit
715
deinit.argtypes = [session_t]
716
deinit.restype = None
718
handshake = _library.gnutls_handshake
719
handshake.argtypes = [session_t]
720
handshake.restype = _error_code
721
handshake.errcheck = _retry_on_error
723
transport_set_ptr = _library.gnutls_transport_set_ptr
724
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
725
transport_set_ptr.restype = None
727
bye = _library.gnutls_bye
728
bye.argtypes = [session_t, close_request_t]
729
bye.restype = _error_code
730
bye.errcheck = _retry_on_error
732
check_version = _library.gnutls_check_version
733
check_version.argtypes = [ctypes.c_char_p]
734
check_version.restype = ctypes.c_char_p
736
_need_version = b"3.3.0"
737
if check_version(_need_version) is None:
738
raise self.Error("Needs GnuTLS {} or later"
739
.format(_need_version))
741
_tls_rawpk_version = b"3.6.6"
742
has_rawpk = bool(check_version(_tls_rawpk_version))
746
class pubkey_st(ctypes.Structure):
748
pubkey_t = ctypes.POINTER(pubkey_st)
750
x509_crt_fmt_t = ctypes.c_int
752
# All the function declarations below are from gnutls/abstract.h
753
pubkey_init = _library.gnutls_pubkey_init
754
pubkey_init.argtypes = [ctypes.POINTER(pubkey_t)]
755
pubkey_init.restype = _error_code
757
pubkey_import = _library.gnutls_pubkey_import
758
pubkey_import.argtypes = [pubkey_t, ctypes.POINTER(datum_t),
760
pubkey_import.restype = _error_code
762
pubkey_get_key_id = _library.gnutls_pubkey_get_key_id
763
pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,
764
ctypes.POINTER(ctypes.c_ubyte),
765
ctypes.POINTER(ctypes.c_size_t)]
766
pubkey_get_key_id.restype = _error_code
768
pubkey_deinit = _library.gnutls_pubkey_deinit
769
pubkey_deinit.argtypes = [pubkey_t]
770
pubkey_deinit.restype = None
772
# All the function declarations below are from gnutls/openpgp.h
774
openpgp_crt_init = _library.gnutls_openpgp_crt_init
775
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
776
openpgp_crt_init.restype = _error_code
778
openpgp_crt_import = _library.gnutls_openpgp_crt_import
779
openpgp_crt_import.argtypes = [openpgp_crt_t,
780
ctypes.POINTER(datum_t),
782
openpgp_crt_import.restype = _error_code
784
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
785
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
786
ctypes.POINTER(ctypes.c_uint)]
787
openpgp_crt_verify_self.restype = _error_code
789
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
790
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
791
openpgp_crt_deinit.restype = None
793
openpgp_crt_get_fingerprint = (
794
_library.gnutls_openpgp_crt_get_fingerprint)
795
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
799
openpgp_crt_get_fingerprint.restype = _error_code
801
if check_version(b"3.6.4"):
802
certificate_type_get2 = _library.gnutls_certificate_type_get2
803
certificate_type_get2.argtypes = [session_t, ctypes.c_int]
804
certificate_type_get2.restype = _error_code
806
# Remove non-public functions
807
del _error_code, _retry_on_error
810
def call_pipe(connection, # : multiprocessing.Connection
811
func, *args, **kwargs):
812
"""This function is meant to be called by multiprocessing.Process
814
This function runs func(*args, **kwargs), and writes the resulting
815
return value on the provided multiprocessing.Connection.
817
connection.send(func(*args, **kwargs))
401
821
class Client(object):
402
822
"""A representation of a client host served by this server.
405
825
approved: bool(); 'None' if not yet approved/disapproved
406
826
approval_delay: datetime.timedelta(); Time to wait for approval
407
827
approval_duration: datetime.timedelta(); Duration of one approval
408
checker: subprocess.Popen(); a running checker process used
409
to see if the client lives.
410
'None' if no process is running.
411
checker_callback_tag: a gobject event source tag, or None
828
checker: multiprocessing.Process(); a running checker process used
829
to see if the client lives. 'None' if no process is
831
checker_callback_tag: a GLib event source tag, or None
412
832
checker_command: string; External command which is run to check
413
833
if client lives. %() expansions are done at
414
834
runtime with vars(self) as dict, so that for
415
835
instance %(name)s can be used in the command.
416
checker_initiator_tag: a gobject event source tag, or None
836
checker_initiator_tag: a GLib event source tag, or None
417
837
created: datetime.datetime(); (UTC) object creation
418
838
client_structure: Object describing what attributes a client has
419
839
and is used for storing the client at exit
420
840
current_checker_command: string; current running checker_command
421
disable_initiator_tag: a gobject event source tag, or None
841
disable_initiator_tag: a GLib event source tag, or None
423
843
fingerprint: string (40 or 32 hexadecimal digits); used to
424
uniquely identify the client
844
uniquely identify an OpenPGP client
845
key_id: string (64 hexadecimal digits); used to uniquely identify
846
a client using raw public keys
425
847
host: string; available for use by the checker command
426
848
interval: datetime.timedelta(); How often to start a new checker
427
849
last_approval_request: datetime.datetime(); (UTC) or None
579
1006
logger.info("Disabling client %s", self.name)
580
1007
if getattr(self, "disable_initiator_tag", None) is not None:
581
gobject.source_remove(self.disable_initiator_tag)
1008
GLib.source_remove(self.disable_initiator_tag)
582
1009
self.disable_initiator_tag = None
583
1010
self.expires = None
584
1011
if getattr(self, "checker_initiator_tag", None) is not None:
585
gobject.source_remove(self.checker_initiator_tag)
1012
GLib.source_remove(self.checker_initiator_tag)
586
1013
self.checker_initiator_tag = None
587
1014
self.stop_checker()
588
1015
self.enabled = False
590
1017
self.send_changedstate()
591
# Do not run this again if called by a gobject.timeout_add
1018
# Do not run this again if called by a GLib.timeout_add
594
1021
def __del__(self):
597
1024
def init_checker(self):
598
1025
# Schedule a new checker to be started an 'interval' from now,
599
1026
# and every interval from then on.
600
1027
if self.checker_initiator_tag is not None:
601
gobject.source_remove(self.checker_initiator_tag)
602
self.checker_initiator_tag = (gobject.timeout_add
604
.total_seconds() * 1000),
1028
GLib.source_remove(self.checker_initiator_tag)
1029
self.checker_initiator_tag = GLib.timeout_add(
1030
int(self.interval.total_seconds() * 1000),
606
1032
# Schedule a disable() when 'timeout' has passed
607
1033
if self.disable_initiator_tag is not None:
608
gobject.source_remove(self.disable_initiator_tag)
609
self.disable_initiator_tag = (gobject.timeout_add
611
.total_seconds() * 1000),
1034
GLib.source_remove(self.disable_initiator_tag)
1035
self.disable_initiator_tag = GLib.timeout_add(
1036
int(self.timeout.total_seconds() * 1000), self.disable)
613
1037
# Also start a new checker *right now*.
614
1038
self.start_checker()
616
def checker_callback(self, pid, condition, command):
1040
def checker_callback(self, source, condition, connection,
617
1042
"""The checker has completed, so take appropriate actions."""
1043
# Read return code from connection (see call_pipe)
1044
returncode = connection.recv()
618
1047
self.checker_callback_tag = None
619
1048
self.checker = None
620
if os.WIFEXITED(condition):
621
self.last_checker_status = os.WEXITSTATUS(condition)
1051
self.last_checker_status = returncode
1052
self.last_checker_signal = None
622
1053
if self.last_checker_status == 0:
623
1054
logger.info("Checker for %(name)s succeeded",
625
1056
self.checked_ok()
627
logger.info("Checker for %(name)s failed",
1058
logger.info("Checker for %(name)s failed", vars(self))
630
1060
self.last_checker_status = -1
1061
self.last_checker_signal = -returncode
631
1062
logger.warning("Checker for %(name)s crashed?",
634
1066
def checked_ok(self):
635
1067
"""Assert that the client has been seen, alive and well."""
636
1068
self.last_checked_ok = datetime.datetime.utcnow()
637
1069
self.last_checker_status = 0
1070
self.last_checker_signal = None
638
1071
self.bump_timeout()
640
1073
def bump_timeout(self, timeout=None):
641
1074
"""Bump up the timeout for this client."""
642
1075
if timeout is None:
643
1076
timeout = self.timeout
644
1077
if self.disable_initiator_tag is not None:
645
gobject.source_remove(self.disable_initiator_tag)
1078
GLib.source_remove(self.disable_initiator_tag)
646
1079
self.disable_initiator_tag = None
647
1080
if getattr(self, "enabled", False):
648
self.disable_initiator_tag = (gobject.timeout_add
649
(int(timeout.total_seconds()
650
* 1000), self.disable))
1081
self.disable_initiator_tag = GLib.timeout_add(
1082
int(timeout.total_seconds() * 1000), self.disable)
651
1083
self.expires = datetime.datetime.utcnow() + timeout
653
1085
def need_approval(self):
654
1086
self.last_approval_request = datetime.datetime.utcnow()
656
1088
def start_checker(self):
657
1089
"""Start a new checker subprocess if one is not running.
659
1091
If a checker already exists, leave it running and do
661
1093
# The reason for not killing a running checker is that if we
666
1098
# checkers alone, the checker would have to take more time
667
1099
# than 'timeout' for the client to be disabled, which is as it
670
# If a checker exists, make sure it is not a zombie
672
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
673
except AttributeError:
675
except OSError as error:
676
if error.errno != errno.ECHILD:
680
logger.warning("Checker was a zombie")
681
gobject.source_remove(self.checker_callback_tag)
682
self.checker_callback(pid, status,
683
self.current_checker_command)
1102
if self.checker is not None and not self.checker.is_alive():
1103
logger.warning("Checker was not alive; joining")
684
1106
# Start a new checker if needed
685
1107
if self.checker is None:
686
1108
# Escape attributes for the shell
687
escaped_attrs = { attr:
688
re.escape(unicode(getattr(self,
690
for attr in self.runtime_expansions }
1110
attr: re.escape(str(getattr(self, attr)))
1111
for attr in self.runtime_expansions}
692
1113
command = self.checker_command % escaped_attrs
693
1114
except TypeError as error:
694
1115
logger.error('Could not format string "%s"',
695
self.checker_command, exc_info=error)
696
return True # Try again later
1116
self.checker_command,
1118
return True # Try again later
697
1119
self.current_checker_command = command
699
logger.info("Starting checker %r for %s",
701
# We don't need to redirect stdout and stderr, since
702
# in normal mode, that is already done by daemon(),
703
# and in debug mode we don't want to. (Stdin is
704
# always replaced by /dev/null.)
705
# The exception is when not debugging but nevertheless
706
# running in the foreground; use the previously
709
if (not self.server_settings["debug"]
710
and self.server_settings["foreground"]):
711
popen_args.update({"stdout": wnull,
713
self.checker = subprocess.Popen(command,
717
except OSError as error:
718
logger.error("Failed to start subprocess",
721
self.checker_callback_tag = (gobject.child_watch_add
723
self.checker_callback,
725
# The checker may have completed before the gobject
726
# watch was added. Check for this.
728
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
729
except OSError as error:
730
if error.errno == errno.ECHILD:
731
# This should never happen
732
logger.error("Child process vanished",
737
gobject.source_remove(self.checker_callback_tag)
738
self.checker_callback(pid, status, command)
739
# Re-run this periodically if run by gobject.timeout_add
1120
logger.info("Starting checker %r for %s", command,
1122
# We don't need to redirect stdout and stderr, since
1123
# in normal mode, that is already done by daemon(),
1124
# and in debug mode we don't want to. (Stdin is
1125
# always replaced by /dev/null.)
1126
# The exception is when not debugging but nevertheless
1127
# running in the foreground; use the previously
1129
popen_args = {"close_fds": True,
1132
if (not self.server_settings["debug"]
1133
and self.server_settings["foreground"]):
1134
popen_args.update({"stdout": wnull,
1136
pipe = multiprocessing.Pipe(duplex=False)
1137
self.checker = multiprocessing.Process(
1139
args=(pipe[1], subprocess.call, command),
1141
self.checker.start()
1142
self.checker_callback_tag = GLib.io_add_watch(
1143
pipe[0].fileno(), GLib.IO_IN,
1144
self.checker_callback, pipe[0], command)
1145
# Re-run this periodically if run by GLib.timeout_add
742
1148
def stop_checker(self):
743
1149
"""Force the checker process, if any, to stop."""
744
1150
if self.checker_callback_tag:
745
gobject.source_remove(self.checker_callback_tag)
1151
GLib.source_remove(self.checker_callback_tag)
746
1152
self.checker_callback_tag = None
747
1153
if getattr(self, "checker", None) is None:
749
1155
logger.debug("Stopping checker for %(name)s", vars(self))
751
self.checker.terminate()
753
#if self.checker.poll() is None:
754
# self.checker.kill()
755
except OSError as error:
756
if error.errno != errno.ESRCH: # No such process
1156
self.checker.terminate()
758
1157
self.checker = None
761
def dbus_service_property(dbus_interface, signature="v",
762
access="readwrite", byte_arrays=False):
1160
def dbus_service_property(dbus_interface,
763
1164
"""Decorators for marking methods of a DBusObjectWithProperties to
764
1165
become properties on the D-Bus.
766
1167
The decorated method will be called with no arguments by "Get"
767
1168
and with one argument by "Set".
769
1170
The parameters, where they are supported, are the same as
770
1171
dbus.service.method, except there is only "signature", since the
771
1172
type from Get() and the type sent to Set() is the same.
845
class DBusObjectWithProperties(dbus.service.Object):
846
"""A D-Bus object with properties.
848
Classes inheriting from this can use the dbus_service_property
849
decorator to expose methods as D-Bus properties. It exposes the
850
standard Get(), Set(), and GetAll() methods on the D-Bus.
1255
class DBusObjectWithAnnotations(dbus.service.Object):
1256
"""A D-Bus object with annotations.
1258
Classes inheriting from this can use the dbus_annotations
1259
decorator to add annotations to methods or signals.
854
1263
def _is_dbus_thing(thing):
855
1264
"""Returns a function testing if an attribute is a D-Bus thing
857
1266
If called like _is_dbus_thing("method") it returns a function
858
1267
suitable for use as predicate to inspect.getmembers().
860
1269
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
863
1272
def _get_all_dbus_things(self, thing):
864
1273
"""Returns a generator of (name, attribute) pairs
866
return ((getattr(athing.__get__(self), "_dbus_name",
1275
return ((getattr(athing.__get__(self), "_dbus_name", name),
868
1276
athing.__get__(self))
869
1277
for cls in self.__class__.__mro__
870
1278
for name, athing in
871
inspect.getmembers(cls,
872
self._is_dbus_thing(thing)))
1279
inspect.getmembers(cls, self._is_dbus_thing(thing)))
1281
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1283
path_keyword='object_path',
1284
connection_keyword='connection')
1285
def Introspect(self, object_path, connection):
1286
"""Overloading of standard D-Bus method.
1288
Inserts annotation tags on methods and signals.
1290
xmlstring = dbus.service.Object.Introspect(self, object_path,
1293
document = xml.dom.minidom.parseString(xmlstring)
1295
for if_tag in document.getElementsByTagName("interface"):
1296
# Add annotation tags
1297
for typ in ("method", "signal"):
1298
for tag in if_tag.getElementsByTagName(typ):
1300
for name, prop in (self.
1301
_get_all_dbus_things(typ)):
1302
if (name == tag.getAttribute("name")
1303
and prop._dbus_interface
1304
== if_tag.getAttribute("name")):
1305
annots.update(getattr(
1306
prop, "_dbus_annotations", {}))
1307
for name, value in annots.items():
1308
ann_tag = document.createElement(
1310
ann_tag.setAttribute("name", name)
1311
ann_tag.setAttribute("value", value)
1312
tag.appendChild(ann_tag)
1313
# Add interface annotation tags
1314
for annotation, value in dict(
1315
itertools.chain.from_iterable(
1316
annotations().items()
1317
for name, annotations
1318
in self._get_all_dbus_things("interface")
1319
if name == if_tag.getAttribute("name")
1321
ann_tag = document.createElement("annotation")
1322
ann_tag.setAttribute("name", annotation)
1323
ann_tag.setAttribute("value", value)
1324
if_tag.appendChild(ann_tag)
1325
# Fix argument name for the Introspect method itself
1326
if (if_tag.getAttribute("name")
1327
== dbus.INTROSPECTABLE_IFACE):
1328
for cn in if_tag.getElementsByTagName("method"):
1329
if cn.getAttribute("name") == "Introspect":
1330
for arg in cn.getElementsByTagName("arg"):
1331
if (arg.getAttribute("direction")
1333
arg.setAttribute("name",
1335
xmlstring = document.toxml("utf-8")
1337
except (AttributeError, xml.dom.DOMException,
1338
xml.parsers.expat.ExpatError) as error:
1339
logger.error("Failed to override Introspection method",
1344
class DBusObjectWithProperties(DBusObjectWithAnnotations):
1345
"""A D-Bus object with properties.
1347
Classes inheriting from this can use the dbus_service_property
1348
decorator to expose methods as D-Bus properties. It exposes the
1349
standard Get(), Set(), and GetAll() methods on the D-Bus.
874
1352
def _get_dbus_property(self, interface_name, property_name):
875
1353
"""Returns a bound method if one exists which is a D-Bus
876
1354
property with the specified name and interface.
878
for cls in self.__class__.__mro__:
879
for name, value in (inspect.getmembers
881
self._is_dbus_thing("property"))):
1356
for cls in self.__class__.__mro__:
1357
for name, value in inspect.getmembers(
1358
cls, self._is_dbus_thing("property")):
882
1359
if (value._dbus_name == property_name
883
1360
and value._dbus_interface == interface_name):
884
1361
return value.__get__(self)
886
1363
# No such property
887
raise DBusPropertyNotFound(self.dbus_object_path + ":"
888
+ interface_name + "."
891
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
1364
raise DBusPropertyNotFound("{}:{}.{}".format(
1365
self.dbus_object_path, interface_name, property_name))
1368
def _get_all_interface_names(cls):
1369
"""Get a sequence of all interfaces supported by an object"""
1370
return (name for name in set(getattr(getattr(x, attr),
1371
"_dbus_interface", None)
1372
for x in (inspect.getmro(cls))
1374
if name is not None)
1376
@dbus.service.method(dbus.PROPERTIES_IFACE,
892
1378
out_signature="v")
893
1379
def Get(self, interface_name, property_name):
894
1380
"""Standard D-Bus property Get() method, see D-Bus standard.
1026
1509
return xmlstring
1513
dbus.OBJECT_MANAGER_IFACE
1514
except AttributeError:
1515
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1518
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1519
"""A D-Bus object with an ObjectManager.
1521
Classes inheriting from this exposes the standard
1522
GetManagedObjects call and the InterfacesAdded and
1523
InterfacesRemoved signals on the standard
1524
"org.freedesktop.DBus.ObjectManager" interface.
1526
Note: No signals are sent automatically; they must be sent
1529
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1530
out_signature="a{oa{sa{sv}}}")
1531
def GetManagedObjects(self):
1532
"""This function must be overridden"""
1533
raise NotImplementedError()
1535
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1536
signature="oa{sa{sv}}")
1537
def InterfacesAdded(self, object_path, interfaces_and_properties):
1540
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1541
def InterfacesRemoved(self, object_path, interfaces):
1544
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1546
path_keyword='object_path',
1547
connection_keyword='connection')
1548
def Introspect(self, object_path, connection):
1549
"""Overloading of standard D-Bus method.
1551
Override return argument name of GetManagedObjects to be
1552
"objpath_interfaces_and_properties"
1554
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1558
document = xml.dom.minidom.parseString(xmlstring)
1560
for if_tag in document.getElementsByTagName("interface"):
1561
# Fix argument name for the GetManagedObjects method
1562
if (if_tag.getAttribute("name")
1563
== dbus.OBJECT_MANAGER_IFACE):
1564
for cn in if_tag.getElementsByTagName("method"):
1565
if (cn.getAttribute("name")
1566
== "GetManagedObjects"):
1567
for arg in cn.getElementsByTagName("arg"):
1568
if (arg.getAttribute("direction")
1572
"objpath_interfaces"
1574
xmlstring = document.toxml("utf-8")
1576
except (AttributeError, xml.dom.DOMException,
1577
xml.parsers.expat.ExpatError) as error:
1578
logger.error("Failed to override Introspection method",
1029
1583
def datetime_to_dbus(dt, variant_level=0):
1030
1584
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1032
return dbus.String("", variant_level = variant_level)
1033
return dbus.String(dt.isoformat(),
1034
variant_level=variant_level)
1586
return dbus.String("", variant_level=variant_level)
1587
return dbus.String(dt.isoformat(), variant_level=variant_level)
1037
1590
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1387
1951
server to mandos-client
1391
1955
# Rejected - signal
1392
1956
@dbus.service.signal(_interface, signature="s")
1393
1957
def Rejected(self, reason):
1397
1961
# NeedApproval - signal
1398
1962
@dbus.service.signal(_interface, signature="tb")
1399
1963
def NeedApproval(self, timeout, default):
1401
1965
return self.need_approval()
1405
1969
# Approve - method
1406
1970
@dbus.service.method(_interface, in_signature="b")
1407
1971
def Approve(self, value):
1408
1972
self.approve(value)
1410
1974
# CheckedOK - method
1411
1975
@dbus.service.method(_interface)
1412
1976
def CheckedOK(self):
1413
1977
self.checked_ok()
1415
1979
# Enable - method
1980
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1416
1981
@dbus.service.method(_interface)
1417
1982
def Enable(self):
1421
1986
# StartChecker - method
1987
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1422
1988
@dbus.service.method(_interface)
1423
1989
def StartChecker(self):
1425
1991
self.start_checker()
1427
1993
# Disable - method
1994
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1428
1995
@dbus.service.method(_interface)
1429
1996
def Disable(self):
1433
2000
# StopChecker - method
2001
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1434
2002
@dbus.service.method(_interface)
1435
2003
def StopChecker(self):
1436
2004
self.stop_checker()
1440
2008
# ApprovalPending - property
1441
2009
@dbus_service_property(_interface, signature="b", access="read")
1442
2010
def ApprovalPending_dbus_property(self):
1443
2011
return dbus.Boolean(bool(self.approvals_pending))
1445
2013
# ApprovedByDefault - property
1446
@dbus_service_property(_interface, signature="b",
2014
@dbus_service_property(_interface,
1447
2016
access="readwrite")
1448
2017
def ApprovedByDefault_dbus_property(self, value=None):
1449
2018
if value is None: # get
1450
2019
return dbus.Boolean(self.approved_by_default)
1451
2020
self.approved_by_default = bool(value)
1453
2022
# ApprovalDelay - property
1454
@dbus_service_property(_interface, signature="t",
2023
@dbus_service_property(_interface,
1455
2025
access="readwrite")
1456
2026
def ApprovalDelay_dbus_property(self, value=None):
1457
2027
if value is None: # get
1458
2028
return dbus.UInt64(self.approval_delay.total_seconds()
1460
2030
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1462
2032
# ApprovalDuration - property
1463
@dbus_service_property(_interface, signature="t",
2033
@dbus_service_property(_interface,
1464
2035
access="readwrite")
1465
2036
def ApprovalDuration_dbus_property(self, value=None):
1466
2037
if value is None: # get
1467
2038
return dbus.UInt64(self.approval_duration.total_seconds()
1469
2040
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1471
2042
# Name - property
2044
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1472
2045
@dbus_service_property(_interface, signature="s", access="read")
1473
2046
def Name_dbus_property(self):
1474
2047
return dbus.String(self.name)
2051
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2052
@dbus_service_property(_interface, signature="s", access="read")
2053
def KeyID_dbus_property(self):
2054
return dbus.String(self.key_id)
1476
2056
# Fingerprint - property
2058
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1477
2059
@dbus_service_property(_interface, signature="s", access="read")
1478
2060
def Fingerprint_dbus_property(self):
1479
2061
return dbus.String(self.fingerprint)
1481
2063
# Host - property
1482
@dbus_service_property(_interface, signature="s",
2064
@dbus_service_property(_interface,
1483
2066
access="readwrite")
1484
2067
def Host_dbus_property(self, value=None):
1485
2068
if value is None: # get
1486
2069
return dbus.String(self.host)
1487
self.host = unicode(value)
2070
self.host = str(value)
1489
2072
# Created - property
2074
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1490
2075
@dbus_service_property(_interface, signature="s", access="read")
1491
2076
def Created_dbus_property(self):
1492
2077
return datetime_to_dbus(self.created)
1494
2079
# LastEnabled - property
1495
2080
@dbus_service_property(_interface, signature="s", access="read")
1496
2081
def LastEnabled_dbus_property(self):
1497
2082
return datetime_to_dbus(self.last_enabled)
1499
2084
# Enabled - property
1500
@dbus_service_property(_interface, signature="b",
2085
@dbus_service_property(_interface,
1501
2087
access="readwrite")
1502
2088
def Enabled_dbus_property(self, value=None):
1503
2089
if value is None: # get
1768
2371
delay -= time2 - time
1771
while sent_size < len(client.secret):
1773
sent = session.send(client.secret[sent_size:])
1774
except gnutls.errors.GNUTLSError as error:
1775
logger.warning("gnutls send failed",
1778
logger.debug("Sent: %d, remaining: %d",
1779
sent, len(client.secret)
1780
- (sent_size + sent))
2374
session.send(client.secret)
2375
except gnutls.Error as error:
2376
logger.warning("gnutls send failed",
1783
2380
logger.info("Sending secret to %s", client.name)
1784
2381
# bump the timeout using extended_timeout
1785
2382
client.bump_timeout(client.extended_timeout)
1786
2383
if self.server.use_dbus:
1787
2384
# Emit D-Bus signal
1788
2385
client.GotSecret()
1791
2388
if approval_required:
1792
2389
client.approvals_pending -= 1
1795
except gnutls.errors.GNUTLSError as error:
2392
except gnutls.Error as error:
1796
2393
logger.warning("GnuTLS bye failed",
1797
2394
exc_info=error)
1800
2397
def peer_certificate(session):
1801
"Return the peer's OpenPGP certificate as a bytestring"
1802
# If not an OpenPGP certificate...
1803
if (gnutls.library.functions
1804
.gnutls_certificate_type_get(session._c_object)
1805
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1806
# ...do the normal thing
1807
return session.peer_certificate
2398
"Return the peer's certificate as a bytestring"
2400
cert_type = gnutls.certificate_type_get2(session._c_object,
2402
except AttributeError:
2403
cert_type = gnutls.certificate_type_get(session._c_object)
2404
if gnutls.has_rawpk:
2405
valid_cert_types = frozenset((gnutls.CRT_RAWPK,))
2407
valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))
2408
# If not a valid certificate type...
2409
if cert_type not in valid_cert_types:
2410
logger.info("Cert type %r not in %r", cert_type,
2412
# ...return invalid data
1808
2414
list_size = ctypes.c_uint(1)
1809
cert_list = (gnutls.library.functions
1810
.gnutls_certificate_get_peers
2415
cert_list = (gnutls.certificate_get_peers
1811
2416
(session._c_object, ctypes.byref(list_size)))
1812
2417
if not bool(cert_list) and list_size.value != 0:
1813
raise gnutls.errors.GNUTLSError("error getting peer"
2418
raise gnutls.Error("error getting peer certificate")
1815
2419
if list_size.value == 0:
1817
2421
cert = cert_list[0]
1818
2422
return ctypes.string_at(cert.data, cert.size)
2425
def key_id(certificate):
2426
"Convert a certificate bytestring to a hexdigit key ID"
2427
# New GnuTLS "datum" with the public key
2428
datum = gnutls.datum_t(
2429
ctypes.cast(ctypes.c_char_p(certificate),
2430
ctypes.POINTER(ctypes.c_ubyte)),
2431
ctypes.c_uint(len(certificate)))
2432
# XXX all these need to be created in the gnutls "module"
2433
# New empty GnuTLS certificate
2434
pubkey = gnutls.pubkey_t()
2435
gnutls.pubkey_init(ctypes.byref(pubkey))
2436
# Import the raw public key into the certificate
2437
gnutls.pubkey_import(pubkey,
2438
ctypes.byref(datum),
2439
gnutls.X509_FMT_DER)
2440
# New buffer for the key ID
2441
buf = ctypes.create_string_buffer(32)
2442
buf_len = ctypes.c_size_t(len(buf))
2443
# Get the key ID from the raw public key into the buffer
2444
gnutls.pubkey_get_key_id(pubkey,
2445
gnutls.KEYID_USE_SHA256,
2446
ctypes.cast(ctypes.byref(buf),
2447
ctypes.POINTER(ctypes.c_ubyte)),
2448
ctypes.byref(buf_len))
2449
# Deinit the certificate
2450
gnutls.pubkey_deinit(pubkey)
2452
# Convert the buffer to a Python bytestring
2453
key_id = ctypes.string_at(buf, buf_len.value)
2454
# Convert the bytestring to hexadecimal notation
2455
hex_key_id = binascii.hexlify(key_id).upper()
1821
2459
def fingerprint(openpgp):
1822
2460
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1823
2461
# New GnuTLS "datum" with the OpenPGP public key
1824
datum = (gnutls.library.types
1825
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1828
ctypes.c_uint(len(openpgp))))
2462
datum = gnutls.datum_t(
2463
ctypes.cast(ctypes.c_char_p(openpgp),
2464
ctypes.POINTER(ctypes.c_ubyte)),
2465
ctypes.c_uint(len(openpgp)))
1829
2466
# New empty GnuTLS certificate
1830
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1831
(gnutls.library.functions
1832
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
2467
crt = gnutls.openpgp_crt_t()
2468
gnutls.openpgp_crt_init(ctypes.byref(crt))
1833
2469
# Import the OpenPGP public key into the certificate
1834
(gnutls.library.functions
1835
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1836
gnutls.library.constants
1837
.GNUTLS_OPENPGP_FMT_RAW))
2470
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2471
gnutls.OPENPGP_FMT_RAW)
1838
2472
# Verify the self signature in the key
1839
2473
crtverify = ctypes.c_uint()
1840
(gnutls.library.functions
1841
.gnutls_openpgp_crt_verify_self(crt, 0,
1842
ctypes.byref(crtverify)))
2474
gnutls.openpgp_crt_verify_self(crt, 0,
2475
ctypes.byref(crtverify))
1843
2476
if crtverify.value != 0:
1844
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1845
raise (gnutls.errors.CertificateSecurityError
2477
gnutls.openpgp_crt_deinit(crt)
2478
raise gnutls.CertificateSecurityError(code
1847
2480
# New buffer for the fingerprint
1848
2481
buf = ctypes.create_string_buffer(20)
1849
2482
buf_len = ctypes.c_size_t()
1850
2483
# Get the fingerprint from the certificate into the buffer
1851
(gnutls.library.functions
1852
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1853
ctypes.byref(buf_len)))
2484
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2485
ctypes.byref(buf_len))
1854
2486
# Deinit the certificate
1855
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2487
gnutls.openpgp_crt_deinit(crt)
1856
2488
# Convert the buffer to a Python bytestring
1857
2489
fpr = ctypes.string_at(buf, buf_len.value)
1858
2490
# Convert the bytestring to hexadecimal notation
1941
2579
# socket_wrapper(), if socketfd was set.
1942
2580
socketserver.TCPServer.__init__(self, server_address,
1943
2581
RequestHandlerClass)
1945
2583
def server_bind(self):
1946
2584
"""This overrides the normal server_bind() function
1947
2585
to bind to an interface if one was specified, and also NOT to
1948
2586
bind to an address or port if they were not specified."""
2587
global SO_BINDTODEVICE
1949
2588
if self.interface is not None:
1950
2589
if SO_BINDTODEVICE is None:
1951
logger.error("SO_BINDTODEVICE does not exist;"
1952
" cannot bind to interface %s",
1956
self.socket.setsockopt(socket.SOL_SOCKET,
1958
(self.interface + "\0")
1960
except socket.error as error:
1961
if error.errno == errno.EPERM:
1962
logger.error("No permission to bind to"
1963
" interface %s", self.interface)
1964
elif error.errno == errno.ENOPROTOOPT:
1965
logger.error("SO_BINDTODEVICE not available;"
1966
" cannot bind to interface %s",
1968
elif error.errno == errno.ENODEV:
1969
logger.error("Interface %s does not exist,"
1970
" cannot bind", self.interface)
2590
# Fall back to a hard-coded value which seems to be
2592
logger.warning("SO_BINDTODEVICE not found, trying 25")
2593
SO_BINDTODEVICE = 25
2595
self.socket.setsockopt(
2596
socket.SOL_SOCKET, SO_BINDTODEVICE,
2597
(self.interface + "\0").encode("utf-8"))
2598
except socket.error as error:
2599
if error.errno == errno.EPERM:
2600
logger.error("No permission to bind to"
2601
" interface %s", self.interface)
2602
elif error.errno == errno.ENOPROTOOPT:
2603
logger.error("SO_BINDTODEVICE not available;"
2604
" cannot bind to interface %s",
2606
elif error.errno == errno.ENODEV:
2607
logger.error("Interface %s does not exist,"
2608
" cannot bind", self.interface)
1973
2611
# Only bind(2) the socket if we really need to.
1974
2612
if self.server_address[0] or self.server_address[1]:
2613
if self.server_address[1]:
2614
self.allow_reuse_address = True
1975
2615
if not self.server_address[0]:
1976
2616
if self.address_family == socket.AF_INET6:
1977
any_address = "::" # in6addr_any
2617
any_address = "::" # in6addr_any
1979
any_address = "0.0.0.0" # INADDR_ANY
2619
any_address = "0.0.0.0" # INADDR_ANY
1980
2620
self.server_address = (any_address,
1981
2621
self.server_address[1])
1982
2622
elif not self.server_address[1]:
1983
self.server_address = (self.server_address[0],
2623
self.server_address = (self.server_address[0], 0)
1985
2624
# if self.interface:
1986
2625
# self.server_address = (self.server_address[0],
2012
2656
self.gnutls_priority = gnutls_priority
2013
2657
IPv6_TCPServer.__init__(self, server_address,
2014
2658
RequestHandlerClass,
2015
interface = interface,
2016
use_ipv6 = use_ipv6,
2017
socketfd = socketfd)
2659
interface=interface,
2018
2663
def server_activate(self):
2019
2664
if self.enabled:
2020
2665
return socketserver.TCPServer.server_activate(self)
2022
2667
def enable(self):
2023
2668
self.enabled = True
2025
2670
def add_pipe(self, parent_pipe, proc):
2026
2671
# Call "handle_ipc" for both data and EOF events
2027
gobject.io_add_watch(parent_pipe.fileno(),
2028
gobject.IO_IN | gobject.IO_HUP,
2029
functools.partial(self.handle_ipc,
2034
def handle_ipc(self, source, condition, parent_pipe=None,
2035
proc = None, client_object=None):
2673
parent_pipe.fileno(),
2674
GLib.IO_IN | GLib.IO_HUP,
2675
functools.partial(self.handle_ipc,
2676
parent_pipe=parent_pipe,
2679
def handle_ipc(self, source, condition,
2682
client_object=None):
2036
2683
# error, or the other end of multiprocessing.Pipe has closed
2037
if condition & (gobject.IO_ERR | gobject.IO_HUP):
2684
if condition & (GLib.IO_ERR | GLib.IO_HUP):
2038
2685
# Wait for other process to exit
2042
2689
# Read a request from the child
2043
2690
request = parent_pipe.recv()
2044
2691
command = request[0]
2046
2693
if command == 'init':
2048
address = request[2]
2050
for c in self.clients.itervalues():
2051
if c.fingerprint == fpr:
2694
key_id = request[1].decode("ascii")
2695
fpr = request[2].decode("ascii")
2696
address = request[3]
2698
for c in self.clients.values():
2699
if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":
2701
if key_id and c.key_id == key_id:
2704
if fpr and c.fingerprint == fpr:
2055
logger.info("Client not found for fingerprint: %s, ad"
2056
"dress: %s", fpr, address)
2708
logger.info("Client not found for key ID: %s, address"
2709
": %s", key_id or fpr, address)
2057
2710
if self.use_dbus:
2058
2711
# Emit D-Bus signal
2059
mandos_dbus_service.ClientNotFound(fpr,
2712
mandos_dbus_service.ClientNotFound(key_id or fpr,
2061
2714
parent_pipe.send(False)
2064
gobject.io_add_watch(parent_pipe.fileno(),
2065
gobject.IO_IN | gobject.IO_HUP,
2066
functools.partial(self.handle_ipc,
2718
parent_pipe.fileno(),
2719
GLib.IO_IN | GLib.IO_HUP,
2720
functools.partial(self.handle_ipc,
2721
parent_pipe=parent_pipe,
2723
client_object=client))
2072
2724
parent_pipe.send(True)
2073
2725
# remove the old hook in favor of the new above hook on
3131
logger.debug("Did setuid/setgid to {}:{}".format(uid,
2474
3133
except OSError as error:
3134
logger.warning("Failed to setuid/setgid to {}:{}: {}"
3135
.format(uid, gid, os.strerror(error.errno)))
2475
3136
if error.errno != errno.EPERM:
2479
3140
# Enable all possible GnuTLS debugging
2481
3142
# "Use a log level over 10 to enable all debugging options."
2482
3143
# - GnuTLS manual
2483
gnutls.library.functions.gnutls_global_set_log_level(11)
2485
@gnutls.library.types.gnutls_log_func
3144
gnutls.global_set_log_level(11)
2486
3147
def debug_gnutls(level, string):
2487
3148
logger.debug("GnuTLS: %s", string[:-1])
2489
(gnutls.library.functions
2490
.gnutls_global_set_log_function(debug_gnutls))
3150
gnutls.global_set_log_function(debug_gnutls)
2492
3152
# Redirect stdin so all checkers get /dev/null
2493
3153
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2494
3154
os.dup2(null, sys.stdin.fileno())
2498
3158
# Need to fork before connecting to D-Bus
2499
3159
if not foreground:
2500
3160
# Close all input and output, do double fork, etc.
2503
# multiprocessing will use threads, so before we use gobject we
2504
# need to inform gobject that threads will be used.
2505
gobject.threads_init()
3163
if gi.version_info < (3, 10, 2):
3164
# multiprocessing will use threads, so before we use GLib we
3165
# need to inform GLib that threads will be used.
2507
3168
global main_loop
2508
3169
# From the Avahi example code
2509
3170
DBusGMainLoop(set_as_default=True)
2510
main_loop = gobject.MainLoop()
3171
main_loop = GLib.MainLoop()
2511
3172
bus = dbus.SystemBus()
2512
3173
# End of Avahi example code
2515
3176
bus_name = dbus.service.BusName("se.recompile.Mandos",
2516
bus, do_not_queue=True)
2517
old_bus_name = (dbus.service.BusName
2518
("se.bsnet.fukt.Mandos", bus,
2520
except dbus.exceptions.NameExistsException as e:
3179
old_bus_name = dbus.service.BusName(
3180
"se.bsnet.fukt.Mandos", bus,
3182
except dbus.exceptions.DBusException as e:
2521
3183
logger.error("Disabling D-Bus:", exc_info=e)
2522
3184
use_dbus = False
2523
3185
server_settings["use_dbus"] = False
2524
3186
tcp_server.use_dbus = False
2526
3188
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2527
service = AvahiServiceToSyslog(name =
2528
server_settings["servicename"],
2529
servicetype = "_mandos._tcp",
2530
protocol = protocol, bus = bus)
3189
service = AvahiServiceToSyslog(
3190
name=server_settings["servicename"],
3191
servicetype="_mandos._tcp",
2531
3194
if server_settings["interface"]:
2532
service.interface = (if_nametoindex
2533
(server_settings["interface"]
3195
service.interface = if_nametoindex(
3196
server_settings["interface"].encode("utf-8"))
2536
3198
global multiprocessing_manager
2537
3199
multiprocessing_manager = multiprocessing.Manager()
2539
3201
client_class = Client
2541
client_class = functools.partial(ClientDBus, bus = bus)
3203
client_class = functools.partial(ClientDBus, bus=bus)
2543
3205
client_settings = Client.config_parser(client_config)
2544
3206
old_client_settings = {}
2545
3207
clients_data = {}
2547
3209
# This is used to redirect stdout and stderr for checker processes
2549
wnull = open(os.devnull, "w") # A writable /dev/null
3211
wnull = open(os.devnull, "w") # A writable /dev/null
2550
3212
# Only used if server is running in foreground but not in debug
2552
3214
if debug or not foreground:
2555
3217
# Get client data and settings from last running state.
2556
3218
if server_settings["restore"]:
2558
3220
with open(stored_state_path, "rb") as stored_state:
2559
clients_data, old_client_settings = (pickle.load
3221
if sys.version_info.major == 2:
3222
clients_data, old_client_settings = pickle.load(
3225
bytes_clients_data, bytes_old_client_settings = (
3226
pickle.load(stored_state, encoding="bytes"))
3227
# Fix bytes to strings
3230
clients_data = {(key.decode("utf-8")
3231
if isinstance(key, bytes)
3234
bytes_clients_data.items()}
3235
del bytes_clients_data
3236
for key in clients_data:
3237
value = {(k.decode("utf-8")
3238
if isinstance(k, bytes) else k): v
3240
clients_data[key].items()}
3241
clients_data[key] = value
3243
value["client_structure"] = [
3245
if isinstance(s, bytes)
3247
value["client_structure"]]
3249
for k in ("name", "host"):
3250
if isinstance(value[k], bytes):
3251
value[k] = value[k].decode("utf-8")
3252
if "key_id" not in value:
3253
value["key_id"] = ""
3254
elif "fingerprint" not in value:
3255
value["fingerprint"] = ""
3256
# old_client_settings
3258
old_client_settings = {
3259
(key.decode("utf-8")
3260
if isinstance(key, bytes)
3263
bytes_old_client_settings.items()}
3264
del bytes_old_client_settings
3266
for value in old_client_settings.values():
3267
if isinstance(value["host"], bytes):
3268
value["host"] = (value["host"]
2561
3270
os.remove(stored_state_path)
2562
3271
except IOError as e:
2563
3272
if e.errno == errno.ENOENT:
2564
logger.warning("Could not load persistent state: {}"
2565
.format(os.strerror(e.errno)))
3273
logger.warning("Could not load persistent state:"
3274
" {}".format(os.strerror(e.errno)))
2567
3276
logger.critical("Could not load persistent state:",
2570
3279
except EOFError as e:
2571
3280
logger.warning("Could not load persistent state: "
2572
"EOFError:", exc_info=e)
2574
3284
with PGPEngine() as pgp:
2575
3285
for client_name, client in clients_data.items():
2576
3286
# Skip removed clients
2577
3287
if client_name not in client_settings:
2580
3290
# Decide which value to use after restoring saved state.
2581
3291
# We have three different values: Old config file,
2582
3292
# new config file, and saved state.
2640
3350
for client_name in (set(client_settings)
2641
3351
- set(old_client_settings)):
2642
3352
clients_data[client_name] = client_settings[client_name]
2644
3354
# Create all client objects
2645
3355
for client_name, client in clients_data.items():
2646
3356
tcp_server.clients[client_name] = client_class(
2647
name = client_name, settings = client,
2648
server_settings = server_settings)
3359
server_settings=server_settings)
2650
3361
if not tcp_server.clients:
2651
3362
logger.warning("No clients defined")
2653
3364
if not foreground:
2654
3365
if pidfile is not None:
2658
pidfile.write("{}\n".format(pid).encode("utf-8"))
3369
print(pid, file=pidfile)
2659
3370
except IOError:
2660
3371
logger.error("Could not write to file %r with PID %d",
2661
3372
pidfilename, pid)
2663
3374
del pidfilename
2665
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2666
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
3376
for termsig in (signal.SIGHUP, signal.SIGTERM):
3377
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3378
lambda: main_loop.quit() and False)
2669
@alternate_dbus_interfaces({"se.recompile.Mandos":
2670
"se.bsnet.fukt.Mandos"})
2671
class MandosDBusService(DBusObjectWithProperties):
3382
@alternate_dbus_interfaces(
3383
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3384
class MandosDBusService(DBusObjectWithObjectManager):
2672
3385
"""A D-Bus proxy object"""
2673
3387
def __init__(self):
2674
3388
dbus.service.Object.__init__(self, bus, "/")
2675
3390
_interface = "se.recompile.Mandos"
2677
@dbus_interface_annotations(_interface)
2679
return { "org.freedesktop.DBus.Property"
2680
".EmitsChangedSignal":
2683
3392
@dbus.service.signal(_interface, signature="o")
2684
3393
def ClientAdded(self, objpath):
2688
3397
@dbus.service.signal(_interface, signature="ss")
2689
def ClientNotFound(self, fingerprint, address):
3398
def ClientNotFound(self, key_id, address):
3402
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
2693
3404
@dbus.service.signal(_interface, signature="os")
2694
3405
def ClientRemoved(self, objpath, name):
3409
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
2698
3411
@dbus.service.method(_interface, out_signature="ao")
2699
3412
def GetAllClients(self):
2701
return dbus.Array(c.dbus_object_path
2703
tcp_server.clients.itervalues())
3414
return dbus.Array(c.dbus_object_path for c in
3415
tcp_server.clients.values())
3417
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
2705
3419
@dbus.service.method(_interface,
2706
3420
out_signature="a{oa{sv}}")
2707
3421
def GetAllClientsWithProperties(self):
2709
3423
return dbus.Dictionary(
2710
((c.dbus_object_path, c.GetAll(""))
2711
for c in tcp_server.clients.itervalues()),
3424
{c.dbus_object_path: c.GetAll(
3425
"se.recompile.Mandos.Client")
3426
for c in tcp_server.clients.values()},
2712
3427
signature="oa{sv}")
2714
3429
@dbus.service.method(_interface, in_signature="o")
2715
3430
def RemoveClient(self, object_path):
2717
for c in tcp_server.clients.itervalues():
3432
for c in tcp_server.clients.values():
2718
3433
if c.dbus_object_path == object_path:
2719
3434
del tcp_server.clients[c.name]
2720
3435
c.remove_from_connection()
2721
# Don't signal anything except ClientRemoved
3436
# Don't signal the disabling
2722
3437
c.disable(quiet=True)
2724
self.ClientRemoved(object_path, c.name)
3438
# Emit D-Bus signal for removal
3439
self.client_removed_signal(c)
2726
3441
raise KeyError(object_path)
3445
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3446
out_signature="a{oa{sa{sv}}}")
3447
def GetManagedObjects(self):
3449
return dbus.Dictionary(
3450
{client.dbus_object_path:
3452
{interface: client.GetAll(interface)
3454
client._get_all_interface_names()})
3455
for client in tcp_server.clients.values()})
3457
def client_added_signal(self, client):
3458
"""Send the new standard signal and the old signal"""
3460
# New standard signal
3461
self.InterfacesAdded(
3462
client.dbus_object_path,
3464
{interface: client.GetAll(interface)
3466
client._get_all_interface_names()}))
3468
self.ClientAdded(client.dbus_object_path)
3470
def client_removed_signal(self, client):
3471
"""Send the new standard signal and the old signal"""
3473
# New standard signal
3474
self.InterfacesRemoved(
3475
client.dbus_object_path,
3476
client._get_all_interface_names())
3478
self.ClientRemoved(client.dbus_object_path,
2730
3481
mandos_dbus_service = MandosDBusService()
3483
# Save modules to variables to exempt the modules from being
3484
# unloaded before the function registered with atexit() is run.
3485
mp = multiprocessing
2733
3489
"Cleanup function; run on exit"
2735
3491
service.cleanup()
2737
multiprocessing.active_children()
3493
mp.active_children()
2739
3495
if not (tcp_server.clients or client_settings):
2742
3498
# Store client before exiting. Secrets are encrypted with key
2743
3499
# based on what config file has. If config file is
2744
3500
# removed/edited, old secret will thus be unrecovable.
2746
3502
with PGPEngine() as pgp:
2747
for client in tcp_server.clients.itervalues():
3503
for client in tcp_server.clients.values():
2748
3504
key = client_settings[client.name]["secret"]
2749
3505
client.encrypted_secret = pgp.encrypt(client.secret,
2751
3507
client_dict = {}
2753
3509
# A list of attributes that can not be pickled
2755
exclude = { "bus", "changedstate", "secret",
2756
"checker", "server_settings" }
2757
for name, typ in (inspect.getmembers
2758
(dbus.service.Object)):
3511
exclude = {"bus", "changedstate", "secret",
3512
"checker", "server_settings"}
3513
for name, typ in inspect.getmembers(dbus.service
2759
3515
exclude.add(name)
2761
3517
client_dict["encrypted_secret"] = (client
2762
3518
.encrypted_secret)
2763
3519
for attr in client.client_structure:
2764
3520
if attr not in exclude:
2765
3521
client_dict[attr] = getattr(client, attr)
2767
3523
clients[client.name] = client_dict
2768
3524
del client_settings[client.name]["secret"]
2771
with (tempfile.NamedTemporaryFile
2772
(mode='wb', suffix=".pickle", prefix='clients-',
2773
dir=os.path.dirname(stored_state_path),
2774
delete=False)) as stored_state:
2775
pickle.dump((clients, client_settings), stored_state)
2776
tempname=stored_state.name
3527
with tempfile.NamedTemporaryFile(
3531
dir=os.path.dirname(stored_state_path),
3532
delete=False) as stored_state:
3533
pickle.dump((clients, client_settings), stored_state,
3535
tempname = stored_state.name
2777
3536
os.rename(tempname, stored_state_path)
2778
3537
except (IOError, OSError) as e: