265
183
.replace(b"\n", b"\\n")
266
184
.replace(b"\0", b"\\x00"))
269
187
def encrypt(self, data, password):
270
188
passphrase = self.password_encode(password)
271
with tempfile.NamedTemporaryFile(
272
dir=self.tempdir) as passfile:
189
with tempfile.NamedTemporaryFile(dir=self.tempdir
273
191
passfile.write(passphrase)
275
proc = subprocess.Popen([self.gpg, '--symmetric',
193
proc = subprocess.Popen(['gpg', '--symmetric',
276
194
'--passphrase-file',
278
196
+ self.gnupgargs,
279
stdin=subprocess.PIPE,
280
stdout=subprocess.PIPE,
281
stderr=subprocess.PIPE)
282
ciphertext, err = proc.communicate(input=data)
197
stdin = subprocess.PIPE,
198
stdout = subprocess.PIPE,
199
stderr = subprocess.PIPE)
200
ciphertext, err = proc.communicate(input = data)
283
201
if proc.returncode != 0:
284
202
raise PGPError(err)
285
203
return ciphertext
287
205
def decrypt(self, data, password):
288
206
passphrase = self.password_encode(password)
289
with tempfile.NamedTemporaryFile(
290
dir=self.tempdir) as passfile:
207
with tempfile.NamedTemporaryFile(dir = self.tempdir
291
209
passfile.write(passphrase)
293
proc = subprocess.Popen([self.gpg, '--decrypt',
211
proc = subprocess.Popen(['gpg', '--decrypt',
294
212
'--passphrase-file',
296
214
+ self.gnupgargs,
297
stdin=subprocess.PIPE,
298
stdout=subprocess.PIPE,
299
stderr=subprocess.PIPE)
300
decrypted_plaintext, err = proc.communicate(input=data)
215
stdin = subprocess.PIPE,
216
stdout = subprocess.PIPE,
217
stderr = subprocess.PIPE)
218
decrypted_plaintext, err = proc.communicate(input
301
220
if proc.returncode != 0:
302
221
raise PGPError(err)
303
222
return decrypted_plaintext
306
# Pretend that we have an Avahi module
308
"""This isn't so much a class as it is a module-like namespace."""
309
IF_UNSPEC = -1 # avahi-common/address.h
310
PROTO_UNSPEC = -1 # avahi-common/address.h
311
PROTO_INET = 0 # avahi-common/address.h
312
PROTO_INET6 = 1 # avahi-common/address.h
313
DBUS_NAME = "org.freedesktop.Avahi"
314
DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"
315
DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"
316
DBUS_PATH_SERVER = "/"
319
def string_array_to_txt_array(t):
320
return dbus.Array((dbus.ByteArray(s.encode("utf-8"))
321
for s in t), signature="ay")
322
ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h
323
ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h
324
ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h
325
SERVER_INVALID = 0 # avahi-common/defs.h
326
SERVER_REGISTERING = 1 # avahi-common/defs.h
327
SERVER_RUNNING = 2 # avahi-common/defs.h
328
SERVER_COLLISION = 3 # avahi-common/defs.h
329
SERVER_FAILURE = 4 # avahi-common/defs.h
332
225
class AvahiError(Exception):
333
226
def __init__(self, value, *args, **kwargs):
334
227
self.value = value
335
228
return super(AvahiError, self).__init__(value, *args,
339
231
class AvahiServiceError(AvahiError):
343
234
class AvahiGroupError(AvahiError):
238
class AvahiService(object):
348
239
"""An Avahi (Zeroconf) service.
351
242
interface: integer; avahi.IF_UNSPEC or an interface index.
352
243
Used to optionally bind to the specified interface.
517
386
follow_name_owner_changes=True),
518
387
avahi.DBUS_INTERFACE_SERVER)
519
388
self.server.connect_to_signal("StateChanged",
520
self.server_state_changed)
389
self.server_state_changed)
521
390
self.server_state_changed(self.server.GetState())
524
393
class AvahiServiceToSyslog(AvahiService):
525
def rename(self, *args, **kwargs):
526
395
"""Add the new name to the syslog messages"""
527
ret = super(AvahiServiceToSyslog, self).rename(*args,
529
syslogger.setFormatter(logging.Formatter(
530
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
396
ret = AvahiService.rename(self)
397
syslogger.setFormatter(logging.Formatter
398
('Mandos ({}) [%(process)d]:'
399
' %(levelname)s: %(message)s'
535
# Pretend that we have a GnuTLS module
537
"""This isn't so much a class as it is a module-like namespace."""
539
library = ctypes.util.find_library("gnutls")
541
library = ctypes.util.find_library("gnutls-deb0")
542
_library = ctypes.cdll.LoadLibrary(library)
545
# Unless otherwise indicated, the constants and types below are
546
# all from the gnutls/gnutls.h C header file.
557
E_NO_CERTIFICATE_FOUND = -49
562
KEYID_USE_SHA256 = 1 # gnutls/x509.h
563
OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
566
class _session_int(ctypes.Structure):
568
session_t = ctypes.POINTER(_session_int)
570
class certificate_credentials_st(ctypes.Structure):
572
certificate_credentials_t = ctypes.POINTER(
573
certificate_credentials_st)
574
certificate_type_t = ctypes.c_int
576
class datum_t(ctypes.Structure):
577
_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
578
('size', ctypes.c_uint)]
580
class _openpgp_crt_int(ctypes.Structure):
582
openpgp_crt_t = ctypes.POINTER(_openpgp_crt_int)
583
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
584
log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
585
credentials_type_t = ctypes.c_int
586
transport_ptr_t = ctypes.c_void_p
587
close_request_t = ctypes.c_int
590
class Error(Exception):
591
def __init__(self, message=None, code=None, args=()):
592
# Default usage is by a message string, but if a return
593
# code is passed, convert it to a string with
596
if message is None and code is not None:
597
message = gnutls.strerror(code).decode(
598
"utf-8", errors="replace")
599
return super(gnutls.Error, self).__init__(
602
class CertificateSecurityError(Error):
606
def __init__(self, cls):
609
def from_param(self, obj):
610
if not isinstance(obj, self.cls):
611
raise TypeError("Not of type {}: {!r}"
612
.format(self.cls.__name__, obj))
613
return ctypes.byref(obj.from_param(obj))
615
class CastToVoidPointer:
616
def __init__(self, cls):
619
def from_param(self, obj):
620
if not isinstance(obj, self.cls):
621
raise TypeError("Not of type {}: {!r}"
622
.format(self.cls.__name__, obj))
623
return ctypes.cast(obj.from_param(obj), ctypes.c_void_p)
625
class With_from_param:
627
def from_param(cls, obj):
628
return obj._as_parameter_
631
class Credentials(With_from_param):
633
self._as_parameter_ = gnutls.certificate_credentials_t()
634
gnutls.certificate_allocate_credentials(self)
635
self.type = gnutls.CRD_CERTIFICATE
638
gnutls.certificate_free_credentials(self)
640
class ClientSession(With_from_param):
641
def __init__(self, socket, credentials=None):
642
self._as_parameter_ = gnutls.session_t()
643
gnutls_flags = gnutls.CLIENT
644
if gnutls.check_version(b"3.5.6"):
645
gnutls_flags |= gnutls.NO_TICKETS
647
gnutls_flags |= gnutls.ENABLE_RAWPK
648
gnutls.init(self, gnutls_flags)
650
gnutls.set_default_priority(self)
651
gnutls.transport_set_ptr(self, socket.fileno())
652
gnutls.handshake_set_private_extensions(self, True)
654
if credentials is None:
655
credentials = gnutls.Credentials()
656
gnutls.credentials_set(self, credentials.type,
658
self.credentials = credentials
664
return gnutls.handshake(self)
666
def send(self, data):
670
data_len -= gnutls.record_send(self, data[-data_len:],
674
return gnutls.bye(self, gnutls.SHUT_RDWR)
676
# Error handling functions
677
def _error_code(result):
678
"""A function to raise exceptions on errors, suitable
679
for the 'restype' attribute on ctypes functions"""
680
if result >= gnutls.E_SUCCESS:
682
if result == gnutls.E_NO_CERTIFICATE_FOUND:
683
raise gnutls.CertificateSecurityError(code=result)
684
raise gnutls.Error(code=result)
686
def _retry_on_error(result, func, arguments,
687
_error_code=_error_code):
688
"""A function to retry on some errors, suitable
689
for the 'errcheck' attribute on ctypes functions"""
690
while result < gnutls.E_SUCCESS:
691
if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
692
return _error_code(result)
693
result = func(*arguments)
696
# Unless otherwise indicated, the function declarations below are
697
# all from the gnutls/gnutls.h C header file.
700
priority_set_direct = _library.gnutls_priority_set_direct
701
priority_set_direct.argtypes = [ClientSession, ctypes.c_char_p,
702
ctypes.POINTER(ctypes.c_char_p)]
703
priority_set_direct.restype = _error_code
705
init = _library.gnutls_init
706
init.argtypes = [PointerTo(ClientSession), ctypes.c_int]
707
init.restype = _error_code
709
set_default_priority = _library.gnutls_set_default_priority
710
set_default_priority.argtypes = [ClientSession]
711
set_default_priority.restype = _error_code
713
record_send = _library.gnutls_record_send
714
record_send.argtypes = [ClientSession, ctypes.c_void_p,
716
record_send.restype = ctypes.c_ssize_t
717
record_send.errcheck = _retry_on_error
719
certificate_allocate_credentials = (
720
_library.gnutls_certificate_allocate_credentials)
721
certificate_allocate_credentials.argtypes = [
722
PointerTo(Credentials)]
723
certificate_allocate_credentials.restype = _error_code
725
certificate_free_credentials = (
726
_library.gnutls_certificate_free_credentials)
727
certificate_free_credentials.argtypes = [Credentials]
728
certificate_free_credentials.restype = None
730
handshake_set_private_extensions = (
731
_library.gnutls_handshake_set_private_extensions)
732
handshake_set_private_extensions.argtypes = [ClientSession,
734
handshake_set_private_extensions.restype = None
736
credentials_set = _library.gnutls_credentials_set
737
credentials_set.argtypes = [ClientSession, credentials_type_t,
738
CastToVoidPointer(Credentials)]
739
credentials_set.restype = _error_code
741
strerror = _library.gnutls_strerror
742
strerror.argtypes = [ctypes.c_int]
743
strerror.restype = ctypes.c_char_p
745
certificate_type_get = _library.gnutls_certificate_type_get
746
certificate_type_get.argtypes = [ClientSession]
747
certificate_type_get.restype = _error_code
749
certificate_get_peers = _library.gnutls_certificate_get_peers
750
certificate_get_peers.argtypes = [ClientSession,
751
ctypes.POINTER(ctypes.c_uint)]
752
certificate_get_peers.restype = ctypes.POINTER(datum_t)
754
global_set_log_level = _library.gnutls_global_set_log_level
755
global_set_log_level.argtypes = [ctypes.c_int]
756
global_set_log_level.restype = None
758
global_set_log_function = _library.gnutls_global_set_log_function
759
global_set_log_function.argtypes = [log_func]
760
global_set_log_function.restype = None
762
deinit = _library.gnutls_deinit
763
deinit.argtypes = [ClientSession]
764
deinit.restype = None
766
handshake = _library.gnutls_handshake
767
handshake.argtypes = [ClientSession]
768
handshake.restype = ctypes.c_int
769
handshake.errcheck = _retry_on_error
771
transport_set_ptr = _library.gnutls_transport_set_ptr
772
transport_set_ptr.argtypes = [ClientSession, transport_ptr_t]
773
transport_set_ptr.restype = None
775
bye = _library.gnutls_bye
776
bye.argtypes = [ClientSession, close_request_t]
777
bye.restype = ctypes.c_int
778
bye.errcheck = _retry_on_error
780
check_version = _library.gnutls_check_version
781
check_version.argtypes = [ctypes.c_char_p]
782
check_version.restype = ctypes.c_char_p
784
_need_version = b"3.3.0"
785
if check_version(_need_version) is None:
786
raise self.Error("Needs GnuTLS {} or later"
787
.format(_need_version))
789
_tls_rawpk_version = b"3.6.6"
790
has_rawpk = bool(check_version(_tls_rawpk_version))
794
class pubkey_st(ctypes.Structure):
796
pubkey_t = ctypes.POINTER(pubkey_st)
798
x509_crt_fmt_t = ctypes.c_int
800
# All the function declarations below are from
802
pubkey_init = _library.gnutls_pubkey_init
803
pubkey_init.argtypes = [ctypes.POINTER(pubkey_t)]
804
pubkey_init.restype = _error_code
806
pubkey_import = _library.gnutls_pubkey_import
807
pubkey_import.argtypes = [pubkey_t, ctypes.POINTER(datum_t),
809
pubkey_import.restype = _error_code
811
pubkey_get_key_id = _library.gnutls_pubkey_get_key_id
812
pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,
813
ctypes.POINTER(ctypes.c_ubyte),
814
ctypes.POINTER(ctypes.c_size_t)]
815
pubkey_get_key_id.restype = _error_code
817
pubkey_deinit = _library.gnutls_pubkey_deinit
818
pubkey_deinit.argtypes = [pubkey_t]
819
pubkey_deinit.restype = None
821
# All the function declarations below are from
824
openpgp_crt_init = _library.gnutls_openpgp_crt_init
825
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
826
openpgp_crt_init.restype = _error_code
828
openpgp_crt_import = _library.gnutls_openpgp_crt_import
829
openpgp_crt_import.argtypes = [openpgp_crt_t,
830
ctypes.POINTER(datum_t),
832
openpgp_crt_import.restype = _error_code
834
openpgp_crt_verify_self = \
835
_library.gnutls_openpgp_crt_verify_self
836
openpgp_crt_verify_self.argtypes = [
839
ctypes.POINTER(ctypes.c_uint),
841
openpgp_crt_verify_self.restype = _error_code
843
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
844
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
845
openpgp_crt_deinit.restype = None
847
openpgp_crt_get_fingerprint = (
848
_library.gnutls_openpgp_crt_get_fingerprint)
849
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
853
openpgp_crt_get_fingerprint.restype = _error_code
855
if check_version(b"3.6.4"):
856
certificate_type_get2 = _library.gnutls_certificate_type_get2
857
certificate_type_get2.argtypes = [ClientSession, ctypes.c_int]
858
certificate_type_get2.restype = _error_code
860
# Remove non-public functions
861
del _error_code, _retry_on_error
864
def call_pipe(connection, # : multiprocessing.Connection
865
func, *args, **kwargs):
866
"""This function is meant to be called by multiprocessing.Process
868
This function runs func(*args, **kwargs), and writes the resulting
869
return value on the provided multiprocessing.Connection.
871
connection.send(func(*args, **kwargs))
404
class Client(object):
876
405
"""A representation of a client host served by this server.
879
408
approved: bool(); 'None' if not yet approved/disapproved
880
409
approval_delay: datetime.timedelta(); Time to wait for approval
881
410
approval_duration: datetime.timedelta(); Duration of one approval
882
checker: multiprocessing.Process(); a running checker process used
883
to see if the client lives. 'None' if no process is
885
checker_callback_tag: a GLib event source tag, or None
411
checker: subprocess.Popen(); a running checker process used
412
to see if the client lives.
413
'None' if no process is running.
414
checker_callback_tag: a gobject event source tag, or None
886
415
checker_command: string; External command which is run to check
887
416
if client lives. %() expansions are done at
888
417
runtime with vars(self) as dict, so that for
889
418
instance %(name)s can be used in the command.
890
checker_initiator_tag: a GLib event source tag, or None
419
checker_initiator_tag: a gobject event source tag, or None
891
420
created: datetime.datetime(); (UTC) object creation
892
421
client_structure: Object describing what attributes a client has
893
422
and is used for storing the client at exit
894
423
current_checker_command: string; current running checker_command
895
disable_initiator_tag: a GLib event source tag, or None
424
disable_initiator_tag: a gobject event source tag, or None
897
426
fingerprint: string (40 or 32 hexadecimal digits); used to
898
uniquely identify an OpenPGP client
899
key_id: string (64 hexadecimal digits); used to uniquely identify
900
a client using raw public keys
427
uniquely identify the client
901
428
host: string; available for use by the checker command
902
429
interval: datetime.timedelta(); How often to start a new checker
903
430
last_approval_request: datetime.datetime(); (UTC) or None
1060
582
logger.info("Disabling client %s", self.name)
1061
583
if getattr(self, "disable_initiator_tag", None) is not None:
1062
GLib.source_remove(self.disable_initiator_tag)
584
gobject.source_remove(self.disable_initiator_tag)
1063
585
self.disable_initiator_tag = None
1064
586
self.expires = None
1065
587
if getattr(self, "checker_initiator_tag", None) is not None:
1066
GLib.source_remove(self.checker_initiator_tag)
588
gobject.source_remove(self.checker_initiator_tag)
1067
589
self.checker_initiator_tag = None
1068
590
self.stop_checker()
1069
591
self.enabled = False
1071
593
self.send_changedstate()
1072
# Do not run this again if called by a GLib.timeout_add
594
# Do not run this again if called by a gobject.timeout_add
1075
597
def __del__(self):
1078
600
def init_checker(self):
1079
601
# Schedule a new checker to be started an 'interval' from now,
1080
602
# and every interval from then on.
1081
603
if self.checker_initiator_tag is not None:
1082
GLib.source_remove(self.checker_initiator_tag)
1083
self.checker_initiator_tag = GLib.timeout_add(
1084
random.randrange(int(self.interval.total_seconds() * 1000
604
gobject.source_remove(self.checker_initiator_tag)
605
self.checker_initiator_tag = (gobject.timeout_add
607
.total_seconds() * 1000),
1087
609
# Schedule a disable() when 'timeout' has passed
1088
610
if self.disable_initiator_tag is not None:
1089
GLib.source_remove(self.disable_initiator_tag)
1090
self.disable_initiator_tag = GLib.timeout_add(
1091
int(self.timeout.total_seconds() * 1000), self.disable)
611
gobject.source_remove(self.disable_initiator_tag)
612
self.disable_initiator_tag = (gobject.timeout_add
614
.total_seconds() * 1000),
1092
616
# Also start a new checker *right now*.
1093
617
self.start_checker()
1095
def checker_callback(self, source, condition, connection,
619
def checker_callback(self, pid, condition, command):
1097
620
"""The checker has completed, so take appropriate actions."""
1098
# Read return code from connection (see call_pipe)
1099
returncode = connection.recv()
1101
if self.checker is not None:
1103
621
self.checker_callback_tag = None
1104
622
self.checker = None
1107
self.last_checker_status = returncode
1108
self.last_checker_signal = None
623
if os.WIFEXITED(condition):
624
self.last_checker_status = os.WEXITSTATUS(condition)
1109
625
if self.last_checker_status == 0:
1110
626
logger.info("Checker for %(name)s succeeded",
1112
628
self.checked_ok()
1114
logger.info("Checker for %(name)s failed", vars(self))
630
logger.info("Checker for %(name)s failed",
1116
633
self.last_checker_status = -1
1117
self.last_checker_signal = -returncode
1118
634
logger.warning("Checker for %(name)s crashed?",
1122
637
def checked_ok(self):
1123
638
"""Assert that the client has been seen, alive and well."""
1124
639
self.last_checked_ok = datetime.datetime.utcnow()
1125
640
self.last_checker_status = 0
1126
self.last_checker_signal = None
1127
641
self.bump_timeout()
1129
643
def bump_timeout(self, timeout=None):
1130
644
"""Bump up the timeout for this client."""
1131
645
if timeout is None:
1132
646
timeout = self.timeout
1133
647
if self.disable_initiator_tag is not None:
1134
GLib.source_remove(self.disable_initiator_tag)
648
gobject.source_remove(self.disable_initiator_tag)
1135
649
self.disable_initiator_tag = None
1136
650
if getattr(self, "enabled", False):
1137
self.disable_initiator_tag = GLib.timeout_add(
1138
int(timeout.total_seconds() * 1000), self.disable)
651
self.disable_initiator_tag = (gobject.timeout_add
652
(int(timeout.total_seconds()
653
* 1000), self.disable))
1139
654
self.expires = datetime.datetime.utcnow() + timeout
1141
656
def need_approval(self):
1142
657
self.last_approval_request = datetime.datetime.utcnow()
1144
659
def start_checker(self):
1145
660
"""Start a new checker subprocess if one is not running.
1147
662
If a checker already exists, leave it running and do
1149
664
# The reason for not killing a running checker is that if we
1154
669
# checkers alone, the checker would have to take more time
1155
670
# than 'timeout' for the client to be disabled, which is as it
1158
if self.checker is not None and not self.checker.is_alive():
1159
logger.warning("Checker was not alive; joining")
673
# If a checker exists, make sure it is not a zombie
675
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
676
except AttributeError:
678
except OSError as error:
679
if error.errno != errno.ECHILD:
683
logger.warning("Checker was a zombie")
684
gobject.source_remove(self.checker_callback_tag)
685
self.checker_callback(pid, status,
686
self.current_checker_command)
1162
687
# Start a new checker if needed
1163
688
if self.checker is None:
1164
689
# Escape attributes for the shell
1166
attr: shlex.quote(str(getattr(self, attr)))
1167
for attr in self.runtime_expansions}
690
escaped_attrs = { attr:
691
re.escape(str(getattr(self, attr)))
692
for attr in self.runtime_expansions }
1169
694
command = self.checker_command % escaped_attrs
1170
695
except TypeError as error:
1171
696
logger.error('Could not format string "%s"',
1172
self.checker_command,
697
self.checker_command, exc_info=error)
698
return True # Try again later
699
self.current_checker_command = command
701
logger.info("Starting checker %r for %s",
703
# We don't need to redirect stdout and stderr, since
704
# in normal mode, that is already done by daemon(),
705
# and in debug mode we don't want to. (Stdin is
706
# always replaced by /dev/null.)
707
# The exception is when not debugging but nevertheless
708
# running in the foreground; use the previously
711
if (not self.server_settings["debug"]
712
and self.server_settings["foreground"]):
713
popen_args.update({"stdout": wnull,
715
self.checker = subprocess.Popen(command,
719
except OSError as error:
720
logger.error("Failed to start subprocess",
1174
return True # Try again later
1175
self.current_checker_command = command
1176
logger.info("Starting checker %r for %s", command,
1178
# We don't need to redirect stdout and stderr, since
1179
# in normal mode, that is already done by daemon(),
1180
# and in debug mode we don't want to. (Stdin is
1181
# always replaced by /dev/null.)
1182
# The exception is when not debugging but nevertheless
1183
# running in the foreground; use the previously
1185
popen_args = {"close_fds": True,
1188
if (not self.server_settings["debug"]
1189
and self.server_settings["foreground"]):
1190
popen_args.update({"stdout": wnull,
1192
pipe = multiprocessing.Pipe(duplex=False)
1193
self.checker = multiprocessing.Process(
1195
args=(pipe[1], subprocess.call, command),
1197
self.checker.start()
1198
self.checker_callback_tag = GLib.io_add_watch(
1199
GLib.IOChannel.unix_new(pipe[0].fileno()),
1200
GLib.PRIORITY_DEFAULT, GLib.IO_IN,
1201
self.checker_callback, pipe[0], command)
1202
# Re-run this periodically if run by GLib.timeout_add
723
self.checker_callback_tag = (gobject.child_watch_add
725
self.checker_callback,
727
# The checker may have completed before the gobject
728
# watch was added. Check for this.
730
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
731
except OSError as error:
732
if error.errno == errno.ECHILD:
733
# This should never happen
734
logger.error("Child process vanished",
739
gobject.source_remove(self.checker_callback_tag)
740
self.checker_callback(pid, status, command)
741
# Re-run this periodically if run by gobject.timeout_add
1205
744
def stop_checker(self):
1206
745
"""Force the checker process, if any, to stop."""
1207
746
if self.checker_callback_tag:
1208
GLib.source_remove(self.checker_callback_tag)
747
gobject.source_remove(self.checker_callback_tag)
1209
748
self.checker_callback_tag = None
1210
749
if getattr(self, "checker", None) is None:
1212
751
logger.debug("Stopping checker for %(name)s", vars(self))
1213
self.checker.terminate()
753
self.checker.terminate()
755
#if self.checker.poll() is None:
756
# self.checker.kill()
757
except OSError as error:
758
if error.errno != errno.ESRCH: # No such process
1214
760
self.checker = None
1217
def dbus_service_property(dbus_interface,
763
def dbus_service_property(dbus_interface, signature="v",
764
access="readwrite", byte_arrays=False):
1221
765
"""Decorators for marking methods of a DBusObjectWithProperties to
1222
766
become properties on the D-Bus.
1224
768
The decorated method will be called with no arguments by "Get"
1225
769
and with one argument by "Set".
1227
771
The parameters, where they are supported, are the same as
1228
772
dbus.service.method, except there is only "signature", since the
1229
773
type from Get() and the type sent to Set() is the same.
1312
class DBusObjectWithAnnotations(dbus.service.Object):
1313
"""A D-Bus object with annotations.
1315
Classes inheriting from this can use the dbus_annotations
1316
decorator to add annotations to methods or signals.
847
class DBusObjectWithProperties(dbus.service.Object):
848
"""A D-Bus object with properties.
850
Classes inheriting from this can use the dbus_service_property
851
decorator to expose methods as D-Bus properties. It exposes the
852
standard Get(), Set(), and GetAll() methods on the D-Bus.
1320
856
def _is_dbus_thing(thing):
1321
857
"""Returns a function testing if an attribute is a D-Bus thing
1323
859
If called like _is_dbus_thing("method") it returns a function
1324
860
suitable for use as predicate to inspect.getmembers().
1326
862
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
1329
865
def _get_all_dbus_things(self, thing):
1330
866
"""Returns a generator of (name, attribute) pairs
1332
return ((getattr(athing.__get__(self), "_dbus_name", name),
868
return ((getattr(athing.__get__(self), "_dbus_name",
1333
870
athing.__get__(self))
1334
871
for cls in self.__class__.__mro__
1335
872
for name, athing in
1336
inspect.getmembers(cls, self._is_dbus_thing(thing)))
1338
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1340
path_keyword='object_path',
1341
connection_keyword='connection')
1342
def Introspect(self, object_path, connection):
1343
"""Overloading of standard D-Bus method.
1345
Inserts annotation tags on methods and signals.
1347
xmlstring = dbus.service.Object.Introspect(self, object_path,
1350
document = xml.dom.minidom.parseString(xmlstring)
1352
for if_tag in document.getElementsByTagName("interface"):
1353
# Add annotation tags
1354
for typ in ("method", "signal"):
1355
for tag in if_tag.getElementsByTagName(typ):
1357
for name, prop in (self.
1358
_get_all_dbus_things(typ)):
1359
if (name == tag.getAttribute("name")
1360
and prop._dbus_interface
1361
== if_tag.getAttribute("name")):
1362
annots.update(getattr(
1363
prop, "_dbus_annotations", {}))
1364
for name, value in annots.items():
1365
ann_tag = document.createElement(
1367
ann_tag.setAttribute("name", name)
1368
ann_tag.setAttribute("value", value)
1369
tag.appendChild(ann_tag)
1370
# Add interface annotation tags
1371
for annotation, value in dict(
1372
itertools.chain.from_iterable(
1373
annotations().items()
1374
for name, annotations
1375
in self._get_all_dbus_things("interface")
1376
if name == if_tag.getAttribute("name")
1378
ann_tag = document.createElement("annotation")
1379
ann_tag.setAttribute("name", annotation)
1380
ann_tag.setAttribute("value", value)
1381
if_tag.appendChild(ann_tag)
1382
# Fix argument name for the Introspect method itself
1383
if (if_tag.getAttribute("name")
1384
== dbus.INTROSPECTABLE_IFACE):
1385
for cn in if_tag.getElementsByTagName("method"):
1386
if cn.getAttribute("name") == "Introspect":
1387
for arg in cn.getElementsByTagName("arg"):
1388
if (arg.getAttribute("direction")
1390
arg.setAttribute("name",
1392
xmlstring = document.toxml("utf-8")
1394
except (AttributeError, xml.dom.DOMException,
1395
xml.parsers.expat.ExpatError) as error:
1396
logger.error("Failed to override Introspection method",
1401
class DBusObjectWithProperties(DBusObjectWithAnnotations):
1402
"""A D-Bus object with properties.
1404
Classes inheriting from this can use the dbus_service_property
1405
decorator to expose methods as D-Bus properties. It exposes the
1406
standard Get(), Set(), and GetAll() methods on the D-Bus.
873
inspect.getmembers(cls,
874
self._is_dbus_thing(thing)))
1409
876
def _get_dbus_property(self, interface_name, property_name):
1410
877
"""Returns a bound method if one exists which is a D-Bus
1411
878
property with the specified name and interface.
1413
for cls in self.__class__.__mro__:
1414
for name, value in inspect.getmembers(
1415
cls, self._is_dbus_thing("property")):
880
for cls in self.__class__.__mro__:
881
for name, value in (inspect.getmembers
883
self._is_dbus_thing("property"))):
1416
884
if (value._dbus_name == property_name
1417
885
and value._dbus_interface == interface_name):
1418
886
return value.__get__(self)
1420
888
# No such property
1421
raise DBusPropertyNotFound("{}:{}.{}".format(
1422
self.dbus_object_path, interface_name, property_name))
1425
def _get_all_interface_names(cls):
1426
"""Get a sequence of all interfaces supported by an object"""
1427
return (name for name in set(getattr(getattr(x, attr),
1428
"_dbus_interface", None)
1429
for x in (inspect.getmro(cls))
1431
if name is not None)
1433
@dbus.service.method(dbus.PROPERTIES_IFACE,
889
raise DBusPropertyNotFound(self.dbus_object_path + ":"
890
+ interface_name + "."
893
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
1435
894
out_signature="v")
1436
895
def Get(self, interface_name, property_name):
1437
896
"""Standard D-Bus property Get() method, see D-Bus standard.
1565
1036
return xmlstring
1569
dbus.OBJECT_MANAGER_IFACE
1570
except AttributeError:
1571
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1574
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1575
"""A D-Bus object with an ObjectManager.
1577
Classes inheriting from this exposes the standard
1578
GetManagedObjects call and the InterfacesAdded and
1579
InterfacesRemoved signals on the standard
1580
"org.freedesktop.DBus.ObjectManager" interface.
1582
Note: No signals are sent automatically; they must be sent
1585
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1586
out_signature="a{oa{sa{sv}}}")
1587
def GetManagedObjects(self):
1588
"""This function must be overridden"""
1589
raise NotImplementedError()
1591
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1592
signature="oa{sa{sv}}")
1593
def InterfacesAdded(self, object_path, interfaces_and_properties):
1596
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1597
def InterfacesRemoved(self, object_path, interfaces):
1600
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1602
path_keyword='object_path',
1603
connection_keyword='connection')
1604
def Introspect(self, object_path, connection):
1605
"""Overloading of standard D-Bus method.
1607
Override return argument name of GetManagedObjects to be
1608
"objpath_interfaces_and_properties"
1610
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1614
document = xml.dom.minidom.parseString(xmlstring)
1616
for if_tag in document.getElementsByTagName("interface"):
1617
# Fix argument name for the GetManagedObjects method
1618
if (if_tag.getAttribute("name")
1619
== dbus.OBJECT_MANAGER_IFACE):
1620
for cn in if_tag.getElementsByTagName("method"):
1621
if (cn.getAttribute("name")
1622
== "GetManagedObjects"):
1623
for arg in cn.getElementsByTagName("arg"):
1624
if (arg.getAttribute("direction")
1628
"objpath_interfaces"
1630
xmlstring = document.toxml("utf-8")
1632
except (AttributeError, xml.dom.DOMException,
1633
xml.parsers.expat.ExpatError) as error:
1634
logger.error("Failed to override Introspection method",
1639
1039
def datetime_to_dbus(dt, variant_level=0):
1640
1040
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1642
return dbus.String("", variant_level=variant_level)
1643
return dbus.String(dt.isoformat(), variant_level=variant_level)
1042
return dbus.String("", variant_level = variant_level)
1043
return dbus.String(dt.isoformat(),
1044
variant_level=variant_level)
1646
1047
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
2007
1407
server to mandos-client
2011
1411
# Rejected - signal
2012
1412
@dbus.service.signal(_interface, signature="s")
2013
1413
def Rejected(self, reason):
2017
1417
# NeedApproval - signal
2018
1418
@dbus.service.signal(_interface, signature="tb")
2019
1419
def NeedApproval(self, timeout, default):
2021
1421
return self.need_approval()
2025
1425
# Approve - method
2026
1426
@dbus.service.method(_interface, in_signature="b")
2027
1427
def Approve(self, value):
2028
1428
self.approve(value)
2030
1430
# CheckedOK - method
2031
1431
@dbus.service.method(_interface)
2032
1432
def CheckedOK(self):
2033
1433
self.checked_ok()
2035
1435
# Enable - method
2036
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
2037
1436
@dbus.service.method(_interface)
2038
1437
def Enable(self):
2042
1441
# StartChecker - method
2043
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
2044
1442
@dbus.service.method(_interface)
2045
1443
def StartChecker(self):
2047
1445
self.start_checker()
2049
1447
# Disable - method
2050
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
2051
1448
@dbus.service.method(_interface)
2052
1449
def Disable(self):
2056
1453
# StopChecker - method
2057
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
2058
1454
@dbus.service.method(_interface)
2059
1455
def StopChecker(self):
2060
1456
self.stop_checker()
2064
1460
# ApprovalPending - property
2065
1461
@dbus_service_property(_interface, signature="b", access="read")
2066
1462
def ApprovalPending_dbus_property(self):
2067
1463
return dbus.Boolean(bool(self.approvals_pending))
2069
1465
# ApprovedByDefault - property
2070
@dbus_service_property(_interface,
1466
@dbus_service_property(_interface, signature="b",
2072
1467
access="readwrite")
2073
1468
def ApprovedByDefault_dbus_property(self, value=None):
2074
1469
if value is None: # get
2075
1470
return dbus.Boolean(self.approved_by_default)
2076
1471
self.approved_by_default = bool(value)
2078
1473
# ApprovalDelay - property
2079
@dbus_service_property(_interface,
1474
@dbus_service_property(_interface, signature="t",
2081
1475
access="readwrite")
2082
1476
def ApprovalDelay_dbus_property(self, value=None):
2083
1477
if value is None: # get
2084
1478
return dbus.UInt64(self.approval_delay.total_seconds()
2086
1480
self.approval_delay = datetime.timedelta(0, 0, 0, value)
2088
1482
# ApprovalDuration - property
2089
@dbus_service_property(_interface,
1483
@dbus_service_property(_interface, signature="t",
2091
1484
access="readwrite")
2092
1485
def ApprovalDuration_dbus_property(self, value=None):
2093
1486
if value is None: # get
2094
1487
return dbus.UInt64(self.approval_duration.total_seconds()
2096
1489
self.approval_duration = datetime.timedelta(0, 0, 0, value)
2098
1491
# Name - property
2100
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2101
1492
@dbus_service_property(_interface, signature="s", access="read")
2102
1493
def Name_dbus_property(self):
2103
1494
return dbus.String(self.name)
2107
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2108
@dbus_service_property(_interface, signature="s", access="read")
2109
def KeyID_dbus_property(self):
2110
return dbus.String(self.key_id)
2112
1496
# Fingerprint - property
2114
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2115
1497
@dbus_service_property(_interface, signature="s", access="read")
2116
1498
def Fingerprint_dbus_property(self):
2117
1499
return dbus.String(self.fingerprint)
2119
1501
# Host - property
2120
@dbus_service_property(_interface,
1502
@dbus_service_property(_interface, signature="s",
2122
1503
access="readwrite")
2123
1504
def Host_dbus_property(self, value=None):
2124
1505
if value is None: # get
2125
1506
return dbus.String(self.host)
2126
1507
self.host = str(value)
2128
1509
# Created - property
2130
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2131
1510
@dbus_service_property(_interface, signature="s", access="read")
2132
1511
def Created_dbus_property(self):
2133
1512
return datetime_to_dbus(self.created)
2135
1514
# LastEnabled - property
2136
1515
@dbus_service_property(_interface, signature="s", access="read")
2137
1516
def LastEnabled_dbus_property(self):
2138
1517
return datetime_to_dbus(self.last_enabled)
2140
1519
# Enabled - property
2141
@dbus_service_property(_interface,
1520
@dbus_service_property(_interface, signature="b",
2143
1521
access="readwrite")
2144
1522
def Enabled_dbus_property(self, value=None):
2145
1523
if value is None: # get
2428
1788
delay -= time2 - time
2431
session.send(client.secret)
2432
except gnutls.Error as error:
2433
logger.warning("gnutls send failed",
1791
while sent_size < len(client.secret):
1793
sent = session.send(client.secret[sent_size:])
1794
except gnutls.errors.GNUTLSError as error:
1795
logger.warning("gnutls send failed",
1798
logger.debug("Sent: %d, remaining: %d",
1799
sent, len(client.secret)
1800
- (sent_size + sent))
2437
1803
logger.info("Sending secret to %s", client.name)
2438
1804
# bump the timeout using extended_timeout
2439
1805
client.bump_timeout(client.extended_timeout)
2440
1806
if self.server.use_dbus:
2441
1807
# Emit D-Bus signal
2442
1808
client.GotSecret()
2445
1811
if approval_required:
2446
1812
client.approvals_pending -= 1
2449
except gnutls.Error as error:
1815
except gnutls.errors.GNUTLSError as error:
2450
1816
logger.warning("GnuTLS bye failed",
2451
1817
exc_info=error)
2454
1820
def peer_certificate(session):
2455
"Return the peer's certificate as a bytestring"
2457
cert_type = gnutls.certificate_type_get2(
2458
session, gnutls.CTYPE_PEERS)
2459
except AttributeError:
2460
cert_type = gnutls.certificate_type_get(session)
2461
if gnutls.has_rawpk:
2462
valid_cert_types = frozenset((gnutls.CRT_RAWPK,))
2464
valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))
2465
# If not a valid certificate type...
2466
if cert_type not in valid_cert_types:
2467
logger.info("Cert type %r not in %r", cert_type,
2469
# ...return invalid data
1821
"Return the peer's OpenPGP certificate as a bytestring"
1822
# If not an OpenPGP certificate...
1823
if (gnutls.library.functions
1824
.gnutls_certificate_type_get(session._c_object)
1825
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1826
# ...do the normal thing
1827
return session.peer_certificate
2471
1828
list_size = ctypes.c_uint(1)
2472
cert_list = (gnutls.certificate_get_peers
2473
(session, ctypes.byref(list_size)))
1829
cert_list = (gnutls.library.functions
1830
.gnutls_certificate_get_peers
1831
(session._c_object, ctypes.byref(list_size)))
2474
1832
if not bool(cert_list) and list_size.value != 0:
2475
raise gnutls.Error("error getting peer certificate")
1833
raise gnutls.errors.GNUTLSError("error getting peer"
2476
1835
if list_size.value == 0:
2478
1837
cert = cert_list[0]
2479
1838
return ctypes.string_at(cert.data, cert.size)
2482
def key_id(certificate):
2483
"Convert a certificate bytestring to a hexdigit key ID"
2484
# New GnuTLS "datum" with the public key
2485
datum = gnutls.datum_t(
2486
ctypes.cast(ctypes.c_char_p(certificate),
2487
ctypes.POINTER(ctypes.c_ubyte)),
2488
ctypes.c_uint(len(certificate)))
2489
# XXX all these need to be created in the gnutls "module"
2490
# New empty GnuTLS certificate
2491
pubkey = gnutls.pubkey_t()
2492
gnutls.pubkey_init(ctypes.byref(pubkey))
2493
# Import the raw public key into the certificate
2494
gnutls.pubkey_import(pubkey,
2495
ctypes.byref(datum),
2496
gnutls.X509_FMT_DER)
2497
# New buffer for the key ID
2498
buf = ctypes.create_string_buffer(32)
2499
buf_len = ctypes.c_size_t(len(buf))
2500
# Get the key ID from the raw public key into the buffer
2501
gnutls.pubkey_get_key_id(
2503
gnutls.KEYID_USE_SHA256,
2504
ctypes.cast(ctypes.byref(buf),
2505
ctypes.POINTER(ctypes.c_ubyte)),
2506
ctypes.byref(buf_len))
2507
# Deinit the certificate
2508
gnutls.pubkey_deinit(pubkey)
2510
# Convert the buffer to a Python bytestring
2511
key_id = ctypes.string_at(buf, buf_len.value)
2512
# Convert the bytestring to hexadecimal notation
2513
hex_key_id = binascii.hexlify(key_id).upper()
2517
1841
def fingerprint(openpgp):
2518
1842
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
2519
1843
# New GnuTLS "datum" with the OpenPGP public key
2520
datum = gnutls.datum_t(
2521
ctypes.cast(ctypes.c_char_p(openpgp),
2522
ctypes.POINTER(ctypes.c_ubyte)),
2523
ctypes.c_uint(len(openpgp)))
1844
datum = (gnutls.library.types
1845
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1848
ctypes.c_uint(len(openpgp))))
2524
1849
# New empty GnuTLS certificate
2525
crt = gnutls.openpgp_crt_t()
2526
gnutls.openpgp_crt_init(ctypes.byref(crt))
1850
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1851
(gnutls.library.functions
1852
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
2527
1853
# Import the OpenPGP public key into the certificate
2528
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2529
gnutls.OPENPGP_FMT_RAW)
1854
(gnutls.library.functions
1855
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1856
gnutls.library.constants
1857
.GNUTLS_OPENPGP_FMT_RAW))
2530
1858
# Verify the self signature in the key
2531
1859
crtverify = ctypes.c_uint()
2532
gnutls.openpgp_crt_verify_self(crt, 0,
2533
ctypes.byref(crtverify))
1860
(gnutls.library.functions
1861
.gnutls_openpgp_crt_verify_self(crt, 0,
1862
ctypes.byref(crtverify)))
2534
1863
if crtverify.value != 0:
2535
gnutls.openpgp_crt_deinit(crt)
2536
raise gnutls.CertificateSecurityError(code
1864
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1865
raise (gnutls.errors.CertificateSecurityError
2538
1867
# New buffer for the fingerprint
2539
1868
buf = ctypes.create_string_buffer(20)
2540
1869
buf_len = ctypes.c_size_t()
2541
1870
# Get the fingerprint from the certificate into the buffer
2542
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2543
ctypes.byref(buf_len))
1871
(gnutls.library.functions
1872
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1873
ctypes.byref(buf_len)))
2544
1874
# Deinit the certificate
2545
gnutls.openpgp_crt_deinit(crt)
1875
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2546
1876
# Convert the buffer to a Python bytestring
2547
1877
fpr = ctypes.string_at(buf, buf_len.value)
2548
1878
# Convert the bytestring to hexadecimal notation
2637
1961
# socket_wrapper(), if socketfd was set.
2638
1962
socketserver.TCPServer.__init__(self, server_address,
2639
1963
RequestHandlerClass)
2641
1965
def server_bind(self):
2642
1966
"""This overrides the normal server_bind() function
2643
1967
to bind to an interface if one was specified, and also NOT to
2644
1968
bind to an address or port if they were not specified."""
2645
global SO_BINDTODEVICE
2646
1969
if self.interface is not None:
2647
1970
if SO_BINDTODEVICE is None:
2648
# Fall back to a hard-coded value which seems to be
2650
logger.warning("SO_BINDTODEVICE not found, trying 25")
2651
SO_BINDTODEVICE = 25
2653
self.socket.setsockopt(
2654
socket.SOL_SOCKET, SO_BINDTODEVICE,
2655
(self.interface + "\0").encode("utf-8"))
2656
except socket.error as error:
2657
if error.errno == errno.EPERM:
2658
logger.error("No permission to bind to"
2659
" interface %s", self.interface)
2660
elif error.errno == errno.ENOPROTOOPT:
2661
logger.error("SO_BINDTODEVICE not available;"
2662
" cannot bind to interface %s",
2664
elif error.errno == errno.ENODEV:
2665
logger.error("Interface %s does not exist,"
2666
" cannot bind", self.interface)
1971
logger.error("SO_BINDTODEVICE does not exist;"
1972
" cannot bind to interface %s",
1976
self.socket.setsockopt(socket.SOL_SOCKET,
1978
(self.interface + "\0")
1980
except socket.error as error:
1981
if error.errno == errno.EPERM:
1982
logger.error("No permission to bind to"
1983
" interface %s", self.interface)
1984
elif error.errno == errno.ENOPROTOOPT:
1985
logger.error("SO_BINDTODEVICE not available;"
1986
" cannot bind to interface %s",
1988
elif error.errno == errno.ENODEV:
1989
logger.error("Interface %s does not exist,"
1990
" cannot bind", self.interface)
2669
1993
# Only bind(2) the socket if we really need to.
2670
1994
if self.server_address[0] or self.server_address[1]:
2671
if self.server_address[1]:
2672
self.allow_reuse_address = True
2673
1995
if not self.server_address[0]:
2674
1996
if self.address_family == socket.AF_INET6:
2675
any_address = "::" # in6addr_any
1997
any_address = "::" # in6addr_any
2677
any_address = "0.0.0.0" # INADDR_ANY
1999
any_address = "0.0.0.0" # INADDR_ANY
2678
2000
self.server_address = (any_address,
2679
2001
self.server_address[1])
2680
2002
elif not self.server_address[1]:
2681
self.server_address = (self.server_address[0], 0)
2003
self.server_address = (self.server_address[0],
2682
2005
# if self.interface:
2683
2006
# self.server_address = (self.server_address[0],
2714
2032
self.gnutls_priority = gnutls_priority
2715
2033
IPv6_TCPServer.__init__(self, server_address,
2716
2034
RequestHandlerClass,
2717
interface=interface,
2035
interface = interface,
2036
use_ipv6 = use_ipv6,
2037
socketfd = socketfd)
2721
2038
def server_activate(self):
2722
2039
if self.enabled:
2723
2040
return socketserver.TCPServer.server_activate(self)
2725
2042
def enable(self):
2726
2043
self.enabled = True
2728
2045
def add_pipe(self, parent_pipe, proc):
2729
2046
# Call "handle_ipc" for both data and EOF events
2731
GLib.IOChannel.unix_new(parent_pipe.fileno()),
2732
GLib.PRIORITY_DEFAULT, GLib.IO_IN | GLib.IO_HUP,
2733
functools.partial(self.handle_ipc,
2734
parent_pipe=parent_pipe,
2737
def handle_ipc(self, source, condition,
2740
client_object=None):
2047
gobject.io_add_watch(parent_pipe.fileno(),
2048
gobject.IO_IN | gobject.IO_HUP,
2049
functools.partial(self.handle_ipc,
2054
def handle_ipc(self, source, condition, parent_pipe=None,
2055
proc = None, client_object=None):
2741
2056
# error, or the other end of multiprocessing.Pipe has closed
2742
if condition & (GLib.IO_ERR | GLib.IO_HUP):
2057
if condition & (gobject.IO_ERR | gobject.IO_HUP):
2743
2058
# Wait for other process to exit
2747
2062
# Read a request from the child
2748
2063
request = parent_pipe.recv()
2749
2064
command = request[0]
2751
2066
if command == 'init':
2752
key_id = request[1].decode("ascii")
2753
fpr = request[2].decode("ascii")
2754
address = request[3]
2756
for c in self.clients.values():
2757
if key_id == ("E3B0C44298FC1C149AFBF4C8996FB924"
2758
"27AE41E4649B934CA495991B7852B855"):
2760
if key_id and c.key_id == key_id:
2763
if fpr and c.fingerprint == fpr:
2068
address = request[2]
2070
for c in self.clients.itervalues():
2071
if c.fingerprint == fpr:
2767
logger.info("Client not found for key ID: %s, address"
2768
": %s", key_id or fpr, address)
2075
logger.info("Client not found for fingerprint: %s, ad"
2076
"dress: %s", fpr, address)
2769
2077
if self.use_dbus:
2770
2078
# Emit D-Bus signal
2771
mandos_dbus_service.ClientNotFound(key_id or fpr,
2079
mandos_dbus_service.ClientNotFound(fpr,
2773
2081
parent_pipe.send(False)
2777
GLib.IOChannel.unix_new(parent_pipe.fileno()),
2778
GLib.PRIORITY_DEFAULT, GLib.IO_IN | GLib.IO_HUP,
2779
functools.partial(self.handle_ipc,
2780
parent_pipe=parent_pipe,
2782
client_object=client))
2084
gobject.io_add_watch(parent_pipe.fileno(),
2085
gobject.IO_IN | gobject.IO_HUP,
2086
functools.partial(self.handle_ipc,
2783
2092
parent_pipe.send(True)
2784
2093
# remove the old hook in favor of the new above hook on
2788
2097
funcname = request[1]
2789
2098
args = request[2]
2790
2099
kwargs = request[3]
2792
2101
parent_pipe.send(('data', getattr(client_object,
2793
2102
funcname)(*args,
2796
2105
if command == 'getattr':
2797
2106
attrname = request[1]
2798
if isinstance(client_object.__getattribute__(attrname),
2799
collections.abc.Callable):
2800
parent_pipe.send(('function', ))
2107
if callable(client_object.__getattribute__(attrname)):
2108
parent_pipe.send(('function',))
2803
'data', client_object.__getattribute__(attrname)))
2110
parent_pipe.send(('data', client_object
2111
.__getattribute__(attrname)))
2805
2113
if command == 'setattr':
2806
2114
attrname = request[1]
2807
2115
value = request[2]
2808
2116
setattr(client_object, attrname, value)
2813
2121
def rfc3339_duration_to_delta(duration):
2814
2122
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2816
>>> timedelta = datetime.timedelta
2817
>>> rfc3339_duration_to_delta("P7D") == timedelta(7)
2819
>>> rfc3339_duration_to_delta("PT60S") == timedelta(0, 60)
2821
>>> rfc3339_duration_to_delta("PT60M") == timedelta(0, 3600)
2823
>>> rfc3339_duration_to_delta("PT24H") == timedelta(1)
2825
>>> rfc3339_duration_to_delta("P1W") == timedelta(7)
2827
>>> rfc3339_duration_to_delta("PT5M30S") == timedelta(0, 330)
2829
>>> rfc3339_duration_to_delta("P1DT3M20S") == timedelta(1, 200)
2124
>>> rfc3339_duration_to_delta("P7D")
2125
datetime.timedelta(7)
2126
>>> rfc3339_duration_to_delta("PT60S")
2127
datetime.timedelta(0, 60)
2128
>>> rfc3339_duration_to_delta("PT60M")
2129
datetime.timedelta(0, 3600)
2130
>>> rfc3339_duration_to_delta("PT24H")
2131
datetime.timedelta(1)
2132
>>> rfc3339_duration_to_delta("P1W")
2133
datetime.timedelta(7)
2134
>>> rfc3339_duration_to_delta("PT5M30S")
2135
datetime.timedelta(0, 330)
2136
>>> rfc3339_duration_to_delta("P1DT3M20S")
2137
datetime.timedelta(1, 200)
2834
2140
# Parsing an RFC 3339 duration with regular expressions is not
2835
2141
# possible - there would have to be multiple places for the same
2836
2142
# values, like seconds. The current code, while more esoteric, is
2837
2143
# cleaner without depending on a parsing library. If Python had a
2838
2144
# built-in library for parsing we would use it, but we'd like to
2839
2145
# avoid excessive use of external libraries.
2841
2147
# New type for defining tokens, syntax, and semantics all-in-one
2842
Token = collections.namedtuple("Token", (
2843
"regexp", # To match token; if "value" is not None, must have
2844
# a "group" containing digits
2845
"value", # datetime.timedelta or None
2846
"followers")) # Tokens valid after this token
2148
Token = collections.namedtuple("Token",
2149
("regexp", # To match token; if
2150
# "value" is not None,
2151
# must have a "group"
2153
"value", # datetime.timedelta or
2155
"followers")) # Tokens valid after
2847
2157
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2848
2158
# the "duration" ABNF definition in RFC 3339, Appendix A.
2849
2159
token_end = Token(re.compile(r"$"), None, frozenset())
2850
2160
token_second = Token(re.compile(r"(\d+)S"),
2851
2161
datetime.timedelta(seconds=1),
2852
frozenset((token_end, )))
2162
frozenset((token_end,)))
2853
2163
token_minute = Token(re.compile(r"(\d+)M"),
2854
2164
datetime.timedelta(minutes=1),
2855
2165
frozenset((token_second, token_end)))
3187
logger.debug("Did setuid/setgid to {}:{}".format(uid,
3189
2494
except OSError as error:
3190
logger.warning("Failed to setuid/setgid to {}:{}: {}"
3191
.format(uid, gid, os.strerror(error.errno)))
3192
2495
if error.errno != errno.EPERM:
3196
2499
# Enable all possible GnuTLS debugging
3198
2501
# "Use a log level over 10 to enable all debugging options."
3199
2502
# - GnuTLS manual
3200
gnutls.global_set_log_level(11)
2503
gnutls.library.functions.gnutls_global_set_log_level(11)
2505
@gnutls.library.types.gnutls_log_func
3203
2506
def debug_gnutls(level, string):
3204
logger.debug("GnuTLS: %s",
3205
string[:-1].decode("utf-8",
3208
gnutls.global_set_log_function(debug_gnutls)
2507
logger.debug("GnuTLS: %s", string[:-1])
2509
(gnutls.library.functions
2510
.gnutls_global_set_log_function(debug_gnutls))
3210
2512
# Redirect stdin so all checkers get /dev/null
3211
2513
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
3212
2514
os.dup2(null, sys.stdin.fileno())
3216
2518
# Need to fork before connecting to D-Bus
3217
2519
if not foreground:
3218
2520
# Close all input and output, do double fork, etc.
3221
if gi.version_info < (3, 10, 2):
3222
# multiprocessing will use threads, so before we use GLib we
3223
# need to inform GLib that threads will be used.
2523
# multiprocessing will use threads, so before we use gobject we
2524
# need to inform gobject that threads will be used.
2525
gobject.threads_init()
3226
2527
global main_loop
3227
2528
# From the Avahi example code
3228
2529
DBusGMainLoop(set_as_default=True)
3229
main_loop = GLib.MainLoop()
2530
main_loop = gobject.MainLoop()
3230
2531
bus = dbus.SystemBus()
3231
2532
# End of Avahi example code
3234
2535
bus_name = dbus.service.BusName("se.recompile.Mandos",
3237
old_bus_name = dbus.service.BusName(
3238
"se.bsnet.fukt.Mandos", bus,
3240
except dbus.exceptions.DBusException as e:
2536
bus, do_not_queue=True)
2537
old_bus_name = (dbus.service.BusName
2538
("se.bsnet.fukt.Mandos", bus,
2540
except dbus.exceptions.NameExistsException as e:
3241
2541
logger.error("Disabling D-Bus:", exc_info=e)
3242
2542
use_dbus = False
3243
2543
server_settings["use_dbus"] = False
3244
2544
tcp_server.use_dbus = False
3246
2546
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3247
service = AvahiServiceToSyslog(
3248
name=server_settings["servicename"],
3249
servicetype="_mandos._tcp",
2547
service = AvahiServiceToSyslog(name =
2548
server_settings["servicename"],
2549
servicetype = "_mandos._tcp",
2550
protocol = protocol, bus = bus)
3252
2551
if server_settings["interface"]:
3253
service.interface = if_nametoindex(
3254
server_settings["interface"].encode("utf-8"))
2552
service.interface = (if_nametoindex
2553
(server_settings["interface"]
3256
2556
global multiprocessing_manager
3257
2557
multiprocessing_manager = multiprocessing.Manager()
3259
2559
client_class = Client
3261
client_class = functools.partial(ClientDBus, bus=bus)
2561
client_class = functools.partial(ClientDBus, bus = bus)
3263
2563
client_settings = Client.config_parser(client_config)
3264
2564
old_client_settings = {}
3265
2565
clients_data = {}
3267
2567
# This is used to redirect stdout and stderr for checker processes
3269
wnull = open(os.devnull, "w") # A writable /dev/null
2569
wnull = open(os.devnull, "w") # A writable /dev/null
3270
2570
# Only used if server is running in foreground but not in debug
3272
2572
if debug or not foreground:
3275
2575
# Get client data and settings from last running state.
3276
2576
if server_settings["restore"]:
3278
2578
with open(stored_state_path, "rb") as stored_state:
3279
if sys.version_info.major == 2:
3280
clients_data, old_client_settings = pickle.load(
3283
bytes_clients_data, bytes_old_client_settings = (
3284
pickle.load(stored_state, encoding="bytes"))
3285
# Fix bytes to strings
3288
clients_data = {(key.decode("utf-8")
3289
if isinstance(key, bytes)
3292
bytes_clients_data.items()}
3293
del bytes_clients_data
3294
for key in clients_data:
3295
value = {(k.decode("utf-8")
3296
if isinstance(k, bytes) else k): v
3298
clients_data[key].items()}
3299
clients_data[key] = value
3301
value["client_structure"] = [
3303
if isinstance(s, bytes)
3305
value["client_structure"]]
3306
# .name, .host, and .checker_command
3307
for k in ("name", "host", "checker_command"):
3308
if isinstance(value[k], bytes):
3309
value[k] = value[k].decode("utf-8")
3310
if "key_id" not in value:
3311
value["key_id"] = ""
3312
elif "fingerprint" not in value:
3313
value["fingerprint"] = ""
3314
# old_client_settings
3316
old_client_settings = {
3317
(key.decode("utf-8")
3318
if isinstance(key, bytes)
3321
bytes_old_client_settings.items()}
3322
del bytes_old_client_settings
3323
# .host and .checker_command
3324
for value in old_client_settings.values():
3325
for attribute in ("host", "checker_command"):
3326
if isinstance(value[attribute], bytes):
3327
value[attribute] = (value[attribute]
2579
clients_data, old_client_settings = (pickle.load
3329
2581
os.remove(stored_state_path)
3330
2582
except IOError as e:
3331
2583
if e.errno == errno.ENOENT:
3332
logger.warning("Could not load persistent state:"
3333
" {}".format(os.strerror(e.errno)))
2584
logger.warning("Could not load persistent state: {}"
2585
.format(os.strerror(e.errno)))
3335
2587
logger.critical("Could not load persistent state:",
3338
2590
except EOFError as e:
3339
2591
logger.warning("Could not load persistent state: "
2592
"EOFError:", exc_info=e)
3343
2594
with PGPEngine() as pgp:
3344
2595
for client_name, client in clients_data.items():
3345
2596
# Skip removed clients
3346
2597
if client_name not in client_settings:
3349
2600
# Decide which value to use after restoring saved state.
3350
2601
# We have three different values: Old config file,
3351
2602
# new config file, and saved state.
3409
2660
for client_name in (set(client_settings)
3410
2661
- set(old_client_settings)):
3411
2662
clients_data[client_name] = client_settings[client_name]
3413
2664
# Create all client objects
3414
2665
for client_name, client in clients_data.items():
3415
2666
tcp_server.clients[client_name] = client_class(
3418
server_settings=server_settings)
2667
name = client_name, settings = client,
2668
server_settings = server_settings)
3420
2670
if not tcp_server.clients:
3421
2671
logger.warning("No clients defined")
3423
2673
if not foreground:
3424
2674
if pidfile is not None:
3428
print(pid, file=pidfile)
2678
pidfile.write("{}\n".format(pid).encode("utf-8"))
3429
2679
except IOError:
3430
2680
logger.error("Could not write to file %r with PID %d",
3431
2681
pidfilename, pid)
3433
2683
del pidfilename
3435
for termsig in (signal.SIGHUP, signal.SIGTERM):
3436
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3437
lambda: main_loop.quit() and False)
2685
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2686
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
3441
@alternate_dbus_interfaces(
3442
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3443
class MandosDBusService(DBusObjectWithObjectManager):
2689
@alternate_dbus_interfaces({"se.recompile.Mandos":
2690
"se.bsnet.fukt.Mandos"})
2691
class MandosDBusService(DBusObjectWithProperties):
3444
2692
"""A D-Bus proxy object"""
3446
2693
def __init__(self):
3447
2694
dbus.service.Object.__init__(self, bus, "/")
3449
2695
_interface = "se.recompile.Mandos"
2697
@dbus_interface_annotations(_interface)
2699
return { "org.freedesktop.DBus.Property"
2700
".EmitsChangedSignal":
3451
2703
@dbus.service.signal(_interface, signature="o")
3452
2704
def ClientAdded(self, objpath):
3456
2708
@dbus.service.signal(_interface, signature="ss")
3457
def ClientNotFound(self, key_id, address):
2709
def ClientNotFound(self, fingerprint, address):
3461
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3463
2713
@dbus.service.signal(_interface, signature="os")
3464
2714
def ClientRemoved(self, objpath, name):
3468
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3470
2718
@dbus.service.method(_interface, out_signature="ao")
3471
2719
def GetAllClients(self):
3473
return dbus.Array(c.dbus_object_path for c in
3474
tcp_server.clients.values())
3476
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
2721
return dbus.Array(c.dbus_object_path
2723
tcp_server.clients.itervalues())
3478
2725
@dbus.service.method(_interface,
3479
2726
out_signature="a{oa{sv}}")
3480
2727
def GetAllClientsWithProperties(self):
3482
2729
return dbus.Dictionary(
3483
{c.dbus_object_path: c.GetAll(
3484
"se.recompile.Mandos.Client")
3485
for c in tcp_server.clients.values()},
2730
{ c.dbus_object_path: c.GetAll("")
2731
for c in tcp_server.clients.itervalues() },
3486
2732
signature="oa{sv}")
3488
2734
@dbus.service.method(_interface, in_signature="o")
3489
2735
def RemoveClient(self, object_path):
3491
for c in tcp_server.clients.values():
2737
for c in tcp_server.clients.itervalues():
3492
2738
if c.dbus_object_path == object_path:
3493
2739
del tcp_server.clients[c.name]
3494
2740
c.remove_from_connection()
3495
# Don't signal the disabling
2741
# Don't signal anything except ClientRemoved
3496
2742
c.disable(quiet=True)
3497
# Emit D-Bus signal for removal
3498
self.client_removed_signal(c)
2744
self.ClientRemoved(object_path, c.name)
3500
2746
raise KeyError(object_path)
3504
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3505
out_signature="a{oa{sa{sv}}}")
3506
def GetManagedObjects(self):
3508
return dbus.Dictionary(
3509
{client.dbus_object_path:
3511
{interface: client.GetAll(interface)
3513
client._get_all_interface_names()})
3514
for client in tcp_server.clients.values()})
3516
def client_added_signal(self, client):
3517
"""Send the new standard signal and the old signal"""
3519
# New standard signal
3520
self.InterfacesAdded(
3521
client.dbus_object_path,
3523
{interface: client.GetAll(interface)
3525
client._get_all_interface_names()}))
3527
self.ClientAdded(client.dbus_object_path)
3529
def client_removed_signal(self, client):
3530
"""Send the new standard signal and the old signal"""
3532
# New standard signal
3533
self.InterfacesRemoved(
3534
client.dbus_object_path,
3535
client._get_all_interface_names())
3537
self.ClientRemoved(client.dbus_object_path,
3540
2750
mandos_dbus_service = MandosDBusService()
3542
# Save modules to variables to exempt the modules from being
3543
# unloaded before the function registered with atexit() is run.
3544
mp = multiprocessing
3548
2753
"Cleanup function; run on exit"
3550
2755
service.cleanup()
3552
mp.active_children()
2757
multiprocessing.active_children()
3554
2759
if not (tcp_server.clients or client_settings):
3557
2762
# Store client before exiting. Secrets are encrypted with key
3558
2763
# based on what config file has. If config file is
3559
2764
# removed/edited, old secret will thus be unrecovable.
3561
2766
with PGPEngine() as pgp:
3562
for client in tcp_server.clients.values():
2767
for client in tcp_server.clients.itervalues():
3563
2768
key = client_settings[client.name]["secret"]
3564
2769
client.encrypted_secret = pgp.encrypt(client.secret,
3566
2771
client_dict = {}
3568
2773
# A list of attributes that can not be pickled
3570
exclude = {"bus", "changedstate", "secret",
3571
"checker", "server_settings"}
3572
for name, typ in inspect.getmembers(dbus.service
2775
exclude = { "bus", "changedstate", "secret",
2776
"checker", "server_settings" }
2777
for name, typ in (inspect.getmembers
2778
(dbus.service.Object)):
3574
2779
exclude.add(name)
3576
2781
client_dict["encrypted_secret"] = (client
3577
2782
.encrypted_secret)
3578
2783
for attr in client.client_structure:
3579
2784
if attr not in exclude:
3580
2785
client_dict[attr] = getattr(client, attr)
3582
2787
clients[client.name] = client_dict
3583
2788
del client_settings[client.name]["secret"]
3586
with tempfile.NamedTemporaryFile(
3590
dir=os.path.dirname(stored_state_path),
3591
delete=False) as stored_state:
3592
pickle.dump((clients, client_settings), stored_state,
3594
tempname = stored_state.name
2791
with (tempfile.NamedTemporaryFile
2792
(mode='wb', suffix=".pickle", prefix='clients-',
2793
dir=os.path.dirname(stored_state_path),
2794
delete=False)) as stored_state:
2795
pickle.dump((clients, client_settings), stored_state)
2796
tempname=stored_state.name
3595
2797
os.rename(tempname, stored_state_path)
3596
2798
except (IOError, OSError) as e: