364
517
follow_name_owner_changes=True),
365
518
avahi.DBUS_INTERFACE_SERVER)
366
519
self.server.connect_to_signal("StateChanged",
367
self.server_state_changed)
520
self.server_state_changed)
368
521
self.server_state_changed(self.server.GetState())
370
524
class AvahiServiceToSyslog(AvahiService):
525
def rename(self, *args, **kwargs):
372
526
"""Add the new name to the syslog messages"""
373
ret = AvahiService.rename(self)
374
syslogger.setFormatter(logging.Formatter
375
('Mandos (%s) [%%(process)d]:'
376
' %%(levelname)s: %%(message)s'
527
ret = super(AvahiServiceToSyslog, self).rename(*args,
529
syslogger.setFormatter(logging.Formatter(
530
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
380
def timedelta_to_milliseconds(td):
381
"Convert a datetime.timedelta() to milliseconds"
382
return ((td.days * 24 * 60 * 60 * 1000)
383
+ (td.seconds * 1000)
384
+ (td.microseconds // 1000))
386
class Client(object):
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))
387
876
"""A representation of a client host served by this server.
390
879
approved: bool(); 'None' if not yet approved/disapproved
391
880
approval_delay: datetime.timedelta(); Time to wait for approval
392
881
approval_duration: datetime.timedelta(); Duration of one approval
393
checker: subprocess.Popen(); a running checker process used
394
to see if the client lives.
395
'None' if no process is running.
396
checker_callback_tag: a gobject event source tag, or None
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
397
886
checker_command: string; External command which is run to check
398
887
if client lives. %() expansions are done at
399
888
runtime with vars(self) as dict, so that for
400
889
instance %(name)s can be used in the command.
401
checker_initiator_tag: a gobject event source tag, or None
890
checker_initiator_tag: a GLib event source tag, or None
402
891
created: datetime.datetime(); (UTC) object creation
403
892
client_structure: Object describing what attributes a client has
404
893
and is used for storing the client at exit
405
894
current_checker_command: string; current running checker_command
406
disable_initiator_tag: a gobject event source tag, or None
895
disable_initiator_tag: a GLib event source tag, or None
408
897
fingerprint: string (40 or 32 hexadecimal digits); used to
409
uniquely identify the client
898
uniquely identify an OpenPGP client
899
key_id: string (64 hexadecimal digits); used to uniquely identify
900
a client using raw public keys
410
901
host: string; available for use by the checker command
411
902
interval: datetime.timedelta(); How often to start a new checker
412
903
last_approval_request: datetime.datetime(); (UTC) or None
413
904
last_checked_ok: datetime.datetime(); (UTC) or None
415
905
last_checker_status: integer between 0 and 255 reflecting exit
416
906
status of last checker. -1 reflects crashed
907
checker, -2 means no checker completed yet.
908
last_checker_signal: The signal which killed the last checker, if
909
last_checker_status is -1
418
910
last_enabled: datetime.datetime(); (UTC) or None
419
911
name: string; from the config file, used in log messages and
420
912
D-Bus identifiers
421
913
secret: bytestring; sent verbatim (over TLS) to client
422
914
timeout: datetime.timedelta(); How long from last_checked_ok
423
915
until this client is disabled
424
extended_timeout: extra long timeout when password has been sent
916
extended_timeout: extra long timeout when secret has been sent
425
917
runtime_expansions: Allowed attributes for runtime expansion.
426
918
expires: datetime.datetime(); time (UTC) when a client will be
427
919
disabled, or None
920
server_settings: The server_settings dict from main()
430
923
runtime_expansions = ("approval_delay", "approval_duration",
431
"created", "enabled", "fingerprint",
432
"host", "interval", "last_checked_ok",
924
"created", "enabled", "expires", "key_id",
925
"fingerprint", "host", "interval",
926
"last_approval_request", "last_checked_ok",
433
927
"last_enabled", "name", "timeout")
435
def timeout_milliseconds(self):
436
"Return the 'timeout' attribute in milliseconds"
437
return timedelta_to_milliseconds(self.timeout)
439
def extended_timeout_milliseconds(self):
440
"Return the 'extended_timeout' attribute in milliseconds"
441
return timedelta_to_milliseconds(self.extended_timeout)
443
def interval_milliseconds(self):
444
"Return the 'interval' attribute in milliseconds"
445
return timedelta_to_milliseconds(self.interval)
447
def approval_delay_milliseconds(self):
448
return timedelta_to_milliseconds(self.approval_delay)
450
def __init__(self, name = None, config=None):
451
"""Note: the 'checker' key in 'config' sets the
452
'checker_command' attribute and *not* the 'checker'
930
"extended_timeout": "PT15M",
932
"checker": "fping -q -- %%(host)s",
934
"approval_delay": "PT0S",
935
"approval_duration": "PT1S",
936
"approved_by_default": "True",
941
def config_parser(config):
942
"""Construct a new dict of client settings of this form:
943
{ client_name: {setting_name: value, ...}, ...}
944
with exceptions for any special settings as defined above.
945
NOTE: Must be a pure function. Must return the same result
946
value given the same arguments.
949
for client_name in config.sections():
950
section = dict(config.items(client_name))
951
client = settings[client_name] = {}
953
client["host"] = section["host"]
954
# Reformat values from string types to Python types
955
client["approved_by_default"] = config.getboolean(
956
client_name, "approved_by_default")
957
client["enabled"] = config.getboolean(client_name,
960
# Uppercase and remove spaces from key_id and fingerprint
961
# for later comparison purposes with return value from the
962
# key_id() and fingerprint() functions
963
client["key_id"] = (section.get("key_id", "").upper()
965
client["fingerprint"] = (section["fingerprint"].upper()
967
if "secret" in section:
968
client["secret"] = codecs.decode(section["secret"]
971
elif "secfile" in section:
972
with open(os.path.expanduser(os.path.expandvars
973
(section["secfile"])),
975
client["secret"] = secfile.read()
977
raise TypeError("No secret or secfile for section {}"
979
client["timeout"] = string_to_delta(section["timeout"])
980
client["extended_timeout"] = string_to_delta(
981
section["extended_timeout"])
982
client["interval"] = string_to_delta(section["interval"])
983
client["approval_delay"] = string_to_delta(
984
section["approval_delay"])
985
client["approval_duration"] = string_to_delta(
986
section["approval_duration"])
987
client["checker_command"] = section["checker"]
988
client["last_approval_request"] = None
989
client["last_checked_ok"] = None
990
client["last_checker_status"] = -2
994
def __init__(self, settings, name=None, server_settings=None):
996
if server_settings is None:
998
self.server_settings = server_settings
999
# adding all client settings
1000
for setting, value in settings.items():
1001
setattr(self, setting, value)
1004
if not hasattr(self, "last_enabled"):
1005
self.last_enabled = datetime.datetime.utcnow()
1006
if not hasattr(self, "expires"):
1007
self.expires = (datetime.datetime.utcnow()
1010
self.last_enabled = None
457
1013
logger.debug("Creating client %r", self.name)
458
# Uppercase and remove spaces from fingerprint for later
459
# comparison purposes with return value from the fingerprint()
461
self.fingerprint = (config["fingerprint"].upper()
1014
logger.debug(" Key ID: %s", self.key_id)
463
1015
logger.debug(" Fingerprint: %s", self.fingerprint)
464
if "secret" in config:
465
self.secret = config["secret"].decode("base64")
466
elif "secfile" in config:
467
with open(os.path.expanduser(os.path.expandvars
468
(config["secfile"])),
470
self.secret = secfile.read()
472
raise TypeError("No secret or secfile for client %s"
474
self.host = config.get("host", "")
475
self.created = datetime.datetime.utcnow()
476
self.enabled = config.get("enabled", True)
477
self.last_approval_request = None
479
self.last_enabled = datetime.datetime.utcnow()
481
self.last_enabled = None
482
self.last_checked_ok = None
483
self.last_checker_status = None
484
self.timeout = string_to_delta(config["timeout"])
485
self.extended_timeout = string_to_delta(config
486
["extended_timeout"])
487
self.interval = string_to_delta(config["interval"])
1016
self.created = settings.get("created",
1017
datetime.datetime.utcnow())
1019
# attributes specific for this server instance
488
1020
self.checker = None
489
1021
self.checker_initiator_tag = None
490
1022
self.disable_initiator_tag = None
492
self.expires = datetime.datetime.utcnow() + self.timeout
495
1023
self.checker_callback_tag = None
496
self.checker_command = config["checker"]
497
1024
self.current_checker_command = None
498
1025
self.approved = None
499
self.approved_by_default = config.get("approved_by_default",
501
1026
self.approvals_pending = 0
502
self.approval_delay = string_to_delta(
503
config["approval_delay"])
504
self.approval_duration = string_to_delta(
505
config["approval_duration"])
506
self.changedstate = (multiprocessing_manager
507
.Condition(multiprocessing_manager
509
self.client_structure = [attr for attr in
510
self.__dict__.iterkeys()
1027
self.changedstate = multiprocessing_manager.Condition(
1028
multiprocessing_manager.Lock())
1029
self.client_structure = [attr
1030
for attr in self.__dict__.keys()
511
1031
if not attr.startswith("_")]
512
1032
self.client_structure.append("client_structure")
514
for name, t in inspect.getmembers(type(self),
1034
for name, t in inspect.getmembers(
1035
type(self), lambda obj: isinstance(obj, property)):
518
1036
if not name.startswith("_"):
519
1037
self.client_structure.append(name)
521
1039
# Send notice to process children that client state has changed
522
1040
def send_changedstate(self):
523
1041
with self.changedstate:
524
1042
self.changedstate.notify_all()
526
1044
def enable(self):
527
1045
"""Start this client's checker and timeout hooks"""
528
1046
if getattr(self, "enabled", False):
529
1047
# Already enabled
531
self.send_changedstate()
532
1049
self.expires = datetime.datetime.utcnow() + self.timeout
533
1050
self.enabled = True
534
1051
self.last_enabled = datetime.datetime.utcnow()
535
1052
self.init_checker()
1053
self.send_changedstate()
537
1055
def disable(self, quiet=True):
538
1056
"""Disable this client."""
539
1057
if not getattr(self, "enabled", False):
542
self.send_changedstate()
544
1060
logger.info("Disabling client %s", self.name)
545
if getattr(self, "disable_initiator_tag", False):
546
gobject.source_remove(self.disable_initiator_tag)
1061
if getattr(self, "disable_initiator_tag", None) is not None:
1062
GLib.source_remove(self.disable_initiator_tag)
547
1063
self.disable_initiator_tag = None
548
1064
self.expires = None
549
if getattr(self, "checker_initiator_tag", False):
550
gobject.source_remove(self.checker_initiator_tag)
1065
if getattr(self, "checker_initiator_tag", None) is not None:
1066
GLib.source_remove(self.checker_initiator_tag)
551
1067
self.checker_initiator_tag = None
552
1068
self.stop_checker()
553
1069
self.enabled = False
554
# Do not run this again if called by a gobject.timeout_add
1071
self.send_changedstate()
1072
# Do not run this again if called by a GLib.timeout_add
557
1075
def __del__(self):
560
1078
def init_checker(self):
561
1079
# Schedule a new checker to be started an 'interval' from now,
562
1080
# and every interval from then on.
563
self.checker_initiator_tag = (gobject.timeout_add
564
(self.interval_milliseconds(),
1081
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
566
1087
# Schedule a disable() when 'timeout' has passed
567
self.disable_initiator_tag = (gobject.timeout_add
568
(self.timeout_milliseconds(),
1088
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)
570
1092
# Also start a new checker *right now*.
571
1093
self.start_checker()
573
def checker_callback(self, pid, condition, command):
1095
def checker_callback(self, source, condition, connection,
574
1097
"""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:
575
1103
self.checker_callback_tag = None
576
1104
self.checker = None
577
if os.WIFEXITED(condition):
578
self.last_checker_status = os.WEXITSTATUS(condition)
1107
self.last_checker_status = returncode
1108
self.last_checker_signal = None
579
1109
if self.last_checker_status == 0:
580
1110
logger.info("Checker for %(name)s succeeded",
582
1112
self.checked_ok()
584
logger.info("Checker for %(name)s failed",
1114
logger.info("Checker for %(name)s failed", vars(self))
587
1116
self.last_checker_status = -1
1117
self.last_checker_signal = -returncode
588
1118
logger.warning("Checker for %(name)s crashed?",
591
def checked_ok(self, timeout=None):
592
"""Bump up the timeout for this client.
594
This should only be called when the client has been seen,
1122
def checked_ok(self):
1123
"""Assert that the client has been seen, alive and well."""
1124
self.last_checked_ok = datetime.datetime.utcnow()
1125
self.last_checker_status = 0
1126
self.last_checker_signal = None
1129
def bump_timeout(self, timeout=None):
1130
"""Bump up the timeout for this client."""
597
1131
if timeout is None:
598
1132
timeout = self.timeout
599
self.last_checked_ok = datetime.datetime.utcnow()
600
1133
if self.disable_initiator_tag is not None:
601
gobject.source_remove(self.disable_initiator_tag)
1134
GLib.source_remove(self.disable_initiator_tag)
1135
self.disable_initiator_tag = None
602
1136
if getattr(self, "enabled", False):
603
self.disable_initiator_tag = (gobject.timeout_add
604
(timedelta_to_milliseconds
605
(timeout), self.disable))
1137
self.disable_initiator_tag = GLib.timeout_add(
1138
int(timeout.total_seconds() * 1000), self.disable)
606
1139
self.expires = datetime.datetime.utcnow() + timeout
608
1141
def need_approval(self):
609
1142
self.last_approval_request = datetime.datetime.utcnow()
611
1144
def start_checker(self):
612
1145
"""Start a new checker subprocess if one is not running.
614
1147
If a checker already exists, leave it running and do
616
1149
# The reason for not killing a running checker is that if we
617
# did that, then if a checker (for some reason) started
618
# running slowly and taking more than 'interval' time, the
619
# client would inevitably timeout, since no checker would get
620
# a chance to run to completion. If we instead leave running
1150
# did that, and if a checker (for some reason) started running
1151
# slowly and taking more than 'interval' time, then the client
1152
# would inevitably timeout, since no checker would get a
1153
# chance to run to completion. If we instead leave running
621
1154
# checkers alone, the checker would have to take more time
622
1155
# than 'timeout' for the client to be disabled, which is as it
625
# If a checker exists, make sure it is not a zombie
627
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
628
except (AttributeError, OSError) as error:
629
if (isinstance(error, OSError)
630
and error.errno != errno.ECHILD):
634
logger.warning("Checker was a zombie")
635
gobject.source_remove(self.checker_callback_tag)
636
self.checker_callback(pid, status,
637
self.current_checker_command)
1158
if self.checker is not None and not self.checker.is_alive():
1159
logger.warning("Checker was not alive; joining")
638
1162
# Start a new checker if needed
639
1163
if self.checker is None:
1164
# Escape attributes for the shell
1166
attr: shlex.quote(str(getattr(self, attr)))
1167
for attr in self.runtime_expansions}
641
# In case checker_command has exactly one % operator
642
command = self.checker_command % self.host
644
# Escape attributes for the shell
645
escaped_attrs = dict(
647
re.escape(unicode(str(getattr(self, attr, "")),
651
self.runtime_expansions)
654
command = self.checker_command % escaped_attrs
655
except TypeError as error:
656
logger.error('Could not format string "%s":'
657
' %s', self.checker_command, error)
658
return True # Try again later
1169
command = self.checker_command % escaped_attrs
1170
except TypeError as error:
1171
logger.error('Could not format string "%s"',
1172
self.checker_command,
1174
return True # Try again later
659
1175
self.current_checker_command = command
661
logger.info("Starting checker %r for %s",
663
# We don't need to redirect stdout and stderr, since
664
# in normal mode, that is already done by daemon(),
665
# and in debug mode we don't want to. (Stdin is
666
# always replaced by /dev/null.)
667
self.checker = subprocess.Popen(command,
670
self.checker_callback_tag = (gobject.child_watch_add
672
self.checker_callback,
674
# The checker may have completed before the gobject
675
# watch was added. Check for this.
676
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
678
gobject.source_remove(self.checker_callback_tag)
679
self.checker_callback(pid, status, command)
680
except OSError as error:
681
logger.error("Failed to start subprocess: %s",
683
# Re-run this periodically if run by gobject.timeout_add
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
686
1205
def stop_checker(self):
687
1206
"""Force the checker process, if any, to stop."""
688
1207
if self.checker_callback_tag:
689
gobject.source_remove(self.checker_callback_tag)
1208
GLib.source_remove(self.checker_callback_tag)
690
1209
self.checker_callback_tag = None
691
1210
if getattr(self, "checker", None) is None:
693
1212
logger.debug("Stopping checker for %(name)s", vars(self))
695
os.kill(self.checker.pid, signal.SIGTERM)
697
#if self.checker.poll() is None:
698
# os.kill(self.checker.pid, signal.SIGKILL)
699
except OSError as error:
700
if error.errno != errno.ESRCH: # No such process
1213
self.checker.terminate()
702
1214
self.checker = None
705
def dbus_service_property(dbus_interface, signature="v",
706
access="readwrite", byte_arrays=False):
1217
def dbus_service_property(dbus_interface,
707
1221
"""Decorators for marking methods of a DBusObjectWithProperties to
708
1222
become properties on the D-Bus.
710
1224
The decorated method will be called with no arguments by "Get"
711
1225
and with one argument by "Set".
713
1227
The parameters, where they are supported, are the same as
714
1228
dbus.service.method, except there is only "signature", since the
715
1229
type from Get() and the type sent to Set() is the same.
885
1561
except (AttributeError, xml.dom.DOMException,
886
1562
xml.parsers.expat.ExpatError) as error:
887
1563
logger.error("Failed to override Introspection method",
892
def datetime_to_dbus (dt, variant_level=0):
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
def datetime_to_dbus(dt, variant_level=0):
893
1640
"""Convert a UTC datetime.datetime() to a D-Bus type."""
895
return dbus.String("", variant_level = variant_level)
896
return dbus.String(dt.isoformat(),
897
variant_level=variant_level)
900
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
902
"""Applied to an empty subclass of a D-Bus object, this metaclass
903
will add additional D-Bus attributes matching a certain pattern.
1642
return dbus.String("", variant_level=variant_level)
1643
return dbus.String(dt.isoformat(), variant_level=variant_level)
1646
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1647
"""A class decorator; applied to a subclass of
1648
dbus.service.Object, it will add alternate D-Bus attributes with
1649
interface names according to the "alt_interface_names" mapping.
1652
@alternate_dbus_interfaces({"org.example.Interface":
1653
"net.example.AlternateInterface"})
1654
class SampleDBusObject(dbus.service.Object):
1655
@dbus.service.method("org.example.Interface")
1656
def SampleDBusMethod():
1659
The above "SampleDBusMethod" on "SampleDBusObject" will be
1660
reachable via two interfaces: "org.example.Interface" and
1661
"net.example.AlternateInterface", the latter of which will have
1662
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1663
"true", unless "deprecate" is passed with a False value.
1665
This works for methods and signals, and also for D-Bus properties
1666
(from DBusObjectWithProperties) and interfaces (from the
1667
dbus_interface_annotations decorator).
905
def __new__(mcs, name, bases, attr):
906
# Go through all the base classes which could have D-Bus
907
# methods, signals, or properties in them
908
for base in (b for b in bases
909
if issubclass(b, dbus.service.Object)):
910
# Go though all attributes of the base class
911
for attrname, attribute in inspect.getmembers(base):
1671
for orig_interface_name, alt_interface_name in (
1672
alt_interface_names.items()):
1674
interface_names = set()
1675
# Go though all attributes of the class
1676
for attrname, attribute in inspect.getmembers(cls):
912
1677
# Ignore non-D-Bus attributes, and D-Bus attributes
913
1678
# with the wrong interface name
914
1679
if (not hasattr(attribute, "_dbus_interface")
915
or not attribute._dbus_interface
916
.startswith("se.recompile.Mandos")):
1680
or not attribute._dbus_interface.startswith(
1681
orig_interface_name)):
918
1683
# Create an alternate D-Bus interface name based on
919
1684
# the current name
920
alt_interface = (attribute._dbus_interface
921
.replace("se.recompile.Mandos",
922
"se.bsnet.fukt.Mandos"))
1685
alt_interface = attribute._dbus_interface.replace(
1686
orig_interface_name, alt_interface_name)
1687
interface_names.add(alt_interface)
923
1688
# Is this a D-Bus signal?
924
1689
if getattr(attribute, "_dbus_is_signal", False):
925
# Extract the original non-method function by
927
nonmethod_func = (dict(
1690
# Extract the original non-method undecorated
1691
# function by black magic
1692
if sys.version_info.major == 2:
1693
nonmethod_func = (dict(
928
1694
zip(attribute.func_code.co_freevars,
929
attribute.__closure__))["func"]
1695
attribute.__closure__))
1696
["func"].cell_contents)
1698
nonmethod_func = (dict(
1699
zip(attribute.__code__.co_freevars,
1700
attribute.__closure__))
1701
["func"].cell_contents)
931
1702
# Create a new, but exactly alike, function
932
1703
# object, and decorate it to be a new D-Bus signal
933
1704
# with the alternate D-Bus interface name
934
new_function = (dbus.service.signal
936
attribute._dbus_signature)
938
nonmethod_func.func_code,
939
nonmethod_func.func_globals,
940
nonmethod_func.func_name,
941
nonmethod_func.func_defaults,
942
nonmethod_func.func_closure)))
1705
new_function = copy_function(nonmethod_func)
1706
new_function = (dbus.service.signal(
1708
attribute._dbus_signature)(new_function))
1709
# Copy annotations, if any
1711
new_function._dbus_annotations = dict(
1712
attribute._dbus_annotations)
1713
except AttributeError:
943
1716
# Define a creator of a function to call both the
944
# old and new functions, so both the old and new
945
# signals gets sent when the function is called
1717
# original and alternate functions, so both the
1718
# original and alternate signals gets sent when
1719
# the function is called
946
1720
def fixscope(func1, func2):
947
1721
"""This function is a scope container to pass
948
1722
func1 and func2 to the "call_both" function
949
1723
outside of its arguments"""
1725
@functools.wraps(func2)
950
1726
def call_both(*args, **kwargs):
951
1727
"""This function will emit two D-Bus
952
1728
signals by calling func1 and func2"""
953
1729
func1(*args, **kwargs)
954
1730
func2(*args, **kwargs)
1731
# Make wrapper function look like a D-Bus
1733
for name, attr in inspect.getmembers(func2):
1734
if name.startswith("_dbus_"):
1735
setattr(call_both, name, attr)
955
1737
return call_both
956
1738
# Create the "call_both" function and add it to
958
attr[attrname] = fixscope(attribute,
1740
attr[attrname] = fixscope(attribute, new_function)
960
1741
# Is this a D-Bus method?
961
1742
elif getattr(attribute, "_dbus_is_method", False):
962
1743
# Create a new, but exactly alike, function
963
1744
# object. Decorate it to be a new D-Bus method
964
1745
# with the alternate D-Bus interface name. Add it
966
attr[attrname] = (dbus.service.method
968
attribute._dbus_in_signature,
969
attribute._dbus_out_signature)
971
(attribute.func_code,
972
attribute.func_globals,
974
attribute.func_defaults,
975
attribute.func_closure)))
1748
dbus.service.method(
1750
attribute._dbus_in_signature,
1751
attribute._dbus_out_signature)
1752
(copy_function(attribute)))
1753
# Copy annotations, if any
1755
attr[attrname]._dbus_annotations = dict(
1756
attribute._dbus_annotations)
1757
except AttributeError:
976
1759
# Is this a D-Bus property?
977
1760
elif getattr(attribute, "_dbus_is_property", False):
978
1761
# Create a new, but exactly alike, function
979
1762
# object, and decorate it to be a new D-Bus
980
1763
# property with the alternate D-Bus interface
981
1764
# name. Add it to the class.
982
attr[attrname] = (dbus_service_property
984
attribute._dbus_signature,
985
attribute._dbus_access,
987
._dbus_get_args_options
990
(attribute.func_code,
991
attribute.func_globals,
993
attribute.func_defaults,
994
attribute.func_closure)))
995
return type.__new__(mcs, name, bases, attr)
1765
attr[attrname] = (dbus_service_property(
1766
alt_interface, attribute._dbus_signature,
1767
attribute._dbus_access,
1768
attribute._dbus_get_args_options
1770
(copy_function(attribute)))
1771
# Copy annotations, if any
1773
attr[attrname]._dbus_annotations = dict(
1774
attribute._dbus_annotations)
1775
except AttributeError:
1777
# Is this a D-Bus interface?
1778
elif getattr(attribute, "_dbus_is_interface", False):
1779
# Create a new, but exactly alike, function
1780
# object. Decorate it to be a new D-Bus interface
1781
# with the alternate D-Bus interface name. Add it
1784
dbus_interface_annotations(alt_interface)
1785
(copy_function(attribute)))
1787
# Deprecate all alternate interfaces
1788
iname = "_AlternateDBusNames_interface_annotation{}"
1789
for interface_name in interface_names:
1791
@dbus_interface_annotations(interface_name)
1793
return {"org.freedesktop.DBus.Deprecated":
1795
# Find an unused name
1796
for aname in (iname.format(i)
1797
for i in itertools.count()):
1798
if aname not in attr:
1802
# Replace the class with a new subclass of it with
1803
# methods, signals, etc. as created above.
1804
if sys.version_info.major == 2:
1805
cls = type(b"{}Alternate".format(cls.__name__),
1808
cls = type("{}Alternate".format(cls.__name__),
1815
@alternate_dbus_interfaces({"se.recompile.Mandos":
1816
"se.bsnet.fukt.Mandos"})
998
1817
class ClientDBus(Client, DBusObjectWithProperties):
999
1818
"""A Client class using D-Bus
1002
1821
dbus_object_path: dbus.ObjectPath
1003
1822
bus: dbus.SystemBus()
1006
1825
runtime_expansions = (Client.runtime_expansions
1007
+ ("dbus_object_path",))
1826
+ ("dbus_object_path", ))
1828
_interface = "se.recompile.Mandos.Client"
1009
1830
# dbus.service.Object doesn't use super(), so we can't either.
1011
def __init__(self, bus = None, *args, **kwargs):
1832
def __init__(self, bus=None, *args, **kwargs):
1013
1834
Client.__init__(self, *args, **kwargs)
1015
self._approvals_pending = 0
1016
1835
# Only now, when this client is initialized, can it show up on
1018
client_object_name = unicode(self.name).translate(
1837
client_object_name = str(self.name).translate(
1019
1838
{ord("."): ord("_"),
1020
1839
ord("-"): ord("_")})
1021
self.dbus_object_path = (dbus.ObjectPath
1022
("/clients/" + client_object_name))
1840
self.dbus_object_path = dbus.ObjectPath(
1841
"/clients/" + client_object_name)
1023
1842
DBusObjectWithProperties.__init__(self, self.bus,
1024
1843
self.dbus_object_path)
1026
def notifychangeproperty(transform_func,
1027
dbus_name, type_func=lambda x: x,
1845
def notifychangeproperty(transform_func, dbus_name,
1846
type_func=lambda x: x,
1848
invalidate_only=False,
1849
_interface=_interface):
1029
1850
""" Modify a variable so that it's a property which announces
1030
1851
its changes to DBus.
1032
1853
transform_fun: Function that takes a value and a variant_level
1033
1854
and transforms it to a D-Bus type.
1034
1855
dbus_name: D-Bus name of the variable
2047
3120
use_ipv6 = server_settings["use_ipv6"]
2048
3121
stored_state_path = os.path.join(server_settings["statedir"],
2049
3122
stored_state_file)
3123
foreground = server_settings["foreground"]
3124
zeroconf = server_settings["zeroconf"]
2052
initlogger(logging.DEBUG)
3127
initlogger(debug, logging.DEBUG)
2054
3129
if not debuglevel:
2057
3132
level = getattr(logging, debuglevel.upper())
3133
initlogger(debug, level)
2060
3135
if server_settings["servicename"] != "Mandos":
2061
syslogger.setFormatter(logging.Formatter
2062
('Mandos (%s) [%%(process)d]:'
2063
' %%(levelname)s: %%(message)s'
2064
% server_settings["servicename"]))
3136
syslogger.setFormatter(
3137
logging.Formatter('Mandos ({}) [%(process)d]:'
3138
' %(levelname)s: %(message)s'.format(
3139
server_settings["servicename"])))
2066
3141
# Parse config file with clients
2067
client_defaults = { "timeout": "5m",
2068
"extended_timeout": "15m",
2070
"checker": "fping -q -- %%(host)s",
2072
"approval_delay": "0s",
2073
"approval_duration": "1s",
2075
client_config = configparser.SafeConfigParser(client_defaults)
3142
client_config = configparser.ConfigParser(Client.client_defaults)
2076
3143
client_config.read(os.path.join(server_settings["configdir"],
2077
3144
"clients.conf"))
2079
3146
global mandos_dbus_service
2080
3147
mandos_dbus_service = None
2082
tcp_server = MandosServer((server_settings["address"],
2083
server_settings["port"]),
2085
interface=(server_settings["interface"]
2089
server_settings["priority"],
2092
pidfilename = "/var/run/mandos.pid"
2094
pidfile = open(pidfilename, "w")
2096
logger.error("Could not open file %r", pidfilename)
2099
uid = pwd.getpwnam("_mandos").pw_uid
2100
gid = pwd.getpwnam("_mandos").pw_gid
2103
uid = pwd.getpwnam("mandos").pw_uid
2104
gid = pwd.getpwnam("mandos").pw_gid
3150
if server_settings["socket"] != "":
3151
socketfd = server_settings["socket"]
3152
tcp_server = MandosServer(
3153
(server_settings["address"], server_settings["port"]),
3155
interface=(server_settings["interface"] or None),
3157
gnutls_priority=server_settings["priority"],
3161
pidfilename = "/run/mandos.pid"
3162
if not os.path.isdir("/run/."):
3163
pidfilename = "/var/run/mandos.pid"
3166
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
3167
except IOError as e:
3168
logger.error("Could not open file %r", pidfilename,
3171
for name, group in (("_mandos", "_mandos"),
3172
("mandos", "mandos"),
3173
("nobody", "nogroup")):
3175
uid = pwd.getpwnam(name).pw_uid
3176
gid = pwd.getpwnam(group).pw_gid
2105
3178
except KeyError:
2107
uid = pwd.getpwnam("nobody").pw_uid
2108
gid = pwd.getpwnam("nobody").pw_gid
3187
logger.debug("Did setuid/setgid to {}:{}".format(uid,
2115
3189
except OSError as error:
2116
if error[0] != errno.EPERM:
3190
logger.warning("Failed to setuid/setgid to {}:{}: {}"
3191
.format(uid, gid, os.strerror(error.errno)))
3192
if error.errno != errno.EPERM:
2120
3196
# Enable all possible GnuTLS debugging
2122
3198
# "Use a log level over 10 to enable all debugging options."
2123
3199
# - GnuTLS manual
2124
gnutls.library.functions.gnutls_global_set_log_level(11)
2126
@gnutls.library.types.gnutls_log_func
3200
gnutls.global_set_log_level(11)
2127
3203
def debug_gnutls(level, string):
2128
logger.debug("GnuTLS: %s", string[:-1])
2130
(gnutls.library.functions
2131
.gnutls_global_set_log_function(debug_gnutls))
3204
logger.debug("GnuTLS: %s",
3205
string[:-1].decode("utf-8",
3208
gnutls.global_set_log_function(debug_gnutls)
2133
3210
# Redirect stdin so all checkers get /dev/null
2134
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
3211
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2135
3212
os.dup2(null, sys.stdin.fileno())
2139
# No console logging
2140
logger.removeHandler(console)
2142
3216
# Need to fork before connecting to D-Bus
2144
3218
# 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.
2147
3226
global main_loop
2148
3227
# From the Avahi example code
2149
DBusGMainLoop(set_as_default=True )
2150
main_loop = gobject.MainLoop()
3228
DBusGMainLoop(set_as_default=True)
3229
main_loop = GLib.MainLoop()
2151
3230
bus = dbus.SystemBus()
2152
3231
# End of Avahi example code
2155
3234
bus_name = dbus.service.BusName("se.recompile.Mandos",
2156
bus, do_not_queue=True)
2157
old_bus_name = (dbus.service.BusName
2158
("se.bsnet.fukt.Mandos", bus,
2160
except dbus.exceptions.NameExistsException as e:
2161
logger.error(unicode(e) + ", disabling D-Bus")
3237
old_bus_name = dbus.service.BusName(
3238
"se.bsnet.fukt.Mandos", bus,
3240
except dbus.exceptions.DBusException as e:
3241
logger.error("Disabling D-Bus:", exc_info=e)
2162
3242
use_dbus = False
2163
3243
server_settings["use_dbus"] = False
2164
3244
tcp_server.use_dbus = False
2165
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2166
service = AvahiServiceToSyslog(name =
2167
server_settings["servicename"],
2168
servicetype = "_mandos._tcp",
2169
protocol = protocol, bus = bus)
2170
if server_settings["interface"]:
2171
service.interface = (if_nametoindex
2172
(str(server_settings["interface"])))
3246
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3247
service = AvahiServiceToSyslog(
3248
name=server_settings["servicename"],
3249
servicetype="_mandos._tcp",
3252
if server_settings["interface"]:
3253
service.interface = if_nametoindex(
3254
server_settings["interface"].encode("utf-8"))
2174
3256
global multiprocessing_manager
2175
3257
multiprocessing_manager = multiprocessing.Manager()
2177
3259
client_class = Client
2179
client_class = functools.partial(ClientDBusTransitional,
2182
special_settings = {
2183
# Some settings need to be accessd by special methods;
2184
# booleans need .getboolean(), etc. Here is a list of them:
2185
"approved_by_default":
2187
client_config.getboolean(section, "approved_by_default"),
2190
client_config.getboolean(section, "enabled"),
2192
# Construct a new dict of client settings of this form:
2193
# { client_name: {setting_name: value, ...}, ...}
2194
# with exceptions for any special settings as defined above
2195
client_settings = dict((clientname,
2198
if setting not in special_settings
2199
else special_settings[setting]
2201
for setting, value in
2202
client_config.items(clientname)))
2203
for clientname in client_config.sections())
3261
client_class = functools.partial(ClientDBus, bus=bus)
3263
client_settings = Client.config_parser(client_config)
2205
3264
old_client_settings = {}
3267
# This is used to redirect stdout and stderr for checker processes
3269
wnull = open(os.devnull, "w") # A writable /dev/null
3270
# Only used if server is running in foreground but not in debug
3272
if debug or not foreground:
2208
3275
# Get client data and settings from last running state.
2209
3276
if server_settings["restore"]:
2211
3278
with open(stored_state_path, "rb") as stored_state:
2212
clients_data, old_client_settings = (pickle.load
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]
2214
3329
os.remove(stored_state_path)
2215
3330
except IOError as e:
2216
logger.warning("Could not load persistent state: {0}"
2218
if e.errno != errno.ENOENT:
3331
if e.errno == errno.ENOENT:
3332
logger.warning("Could not load persistent state:"
3333
" {}".format(os.strerror(e.errno)))
3335
logger.critical("Could not load persistent state:",
2221
with Crypto() as crypt:
2222
for client in clients_data:
2223
client_name = client["name"]
3338
except EOFError as e:
3339
logger.warning("Could not load persistent state: "
3343
with PGPEngine() as pgp:
3344
for client_name, client in clients_data.items():
3345
# Skip removed clients
3346
if client_name not in client_settings:
2225
3349
# Decide which value to use after restoring saved state.
2226
3350
# We have three different values: Old config file,
2227
3351
# new config file, and saved state.
2232
3356
# For each value in new config, check if it
2233
3357
# differs from the old config value (Except for
2234
3358
# the "secret" attribute)
2235
if (name != "secret" and
2236
value != old_client_settings[client_name]
2238
setattr(client, name, value)
3359
if (name != "secret"
3361
old_client_settings[client_name][name])):
3362
client[name] = value
2239
3363
except KeyError:
2242
3366
# Clients who has passed its expire date can still be
2243
# enabled if its last checker was sucessful. Clients
2244
# whose checker failed before we stored its state is
2245
# assumed to have failed all checkers during downtime.
2246
if client["enabled"] and client["last_checked_ok"]:
2247
if ((datetime.datetime.utcnow()
2248
- client["last_checked_ok"])
2249
> client["interval"]):
2250
if client["last_checker_status"] != 0:
3367
# enabled if its last checker was successful. A Client
3368
# whose checker succeeded before we stored its state is
3369
# assumed to have successfully run all checkers during
3371
if client["enabled"]:
3372
if datetime.datetime.utcnow() >= client["expires"]:
3373
if not client["last_checked_ok"]:
3375
"disabling client {} - Client never "
3376
"performed a successful checker".format(
3378
client["enabled"] = False
3379
elif client["last_checker_status"] != 0:
3381
"disabling client {} - Client last"
3382
" checker failed with error code"
3385
client["last_checker_status"]))
2251
3386
client["enabled"] = False
2253
client["expires"] = (datetime.datetime
2255
+ client["timeout"])
2257
client["changedstate"] = (multiprocessing_manager
2259
(multiprocessing_manager
2262
new_client = (ClientDBusTransitional.__new__
2263
(ClientDBusTransitional))
2264
tcp_server.clients[client_name] = new_client
2265
new_client.bus = bus
2266
for name, value in client.iteritems():
2267
setattr(new_client, name, value)
2268
client_object_name = unicode(client_name).translate(
2269
{ord("."): ord("_"),
2270
ord("-"): ord("_")})
2271
new_client.dbus_object_path = (dbus.ObjectPath
2273
+ client_object_name))
2274
DBusObjectWithProperties.__init__(new_client,
2279
tcp_server.clients[client_name] = (Client.__new__
2281
for name, value in client.iteritems():
2282
setattr(tcp_server.clients[client_name],
3388
client["expires"] = (
3389
datetime.datetime.utcnow()
3390
+ client["timeout"])
3391
logger.debug("Last checker succeeded,"
3392
" keeping {} enabled".format(
2286
tcp_server.clients[client_name].secret = (
2287
crypt.decrypt(tcp_server.clients[client_name]
2289
client_settings[client_name]
3395
client["secret"] = pgp.decrypt(
3396
client["encrypted_secret"],
3397
client_settings[client_name]["secret"])
2292
3399
# If decryption fails, we use secret from new settings
2293
tcp_server.clients[client_name].secret = (
2294
client_settings[client_name]["secret"])
2296
# Create/remove clients based on new changes made to config
2297
for clientname in set(old_client_settings) - set(client_settings):
2298
del tcp_server.clients[clientname]
2299
for clientname in set(client_settings) - set(old_client_settings):
2300
tcp_server.clients[clientname] = (client_class(name
3400
logger.debug("Failed to decrypt {} old secret".format(
3402
client["secret"] = (client_settings[client_name]
3405
# Add/remove clients based on new changes made to config
3406
for client_name in (set(old_client_settings)
3407
- set(client_settings)):
3408
del clients_data[client_name]
3409
for client_name in (set(client_settings)
3410
- set(old_client_settings)):
3411
clients_data[client_name] = client_settings[client_name]
3413
# Create all client objects
3414
for client_name, client in clients_data.items():
3415
tcp_server.clients[client_name] = client_class(
3418
server_settings=server_settings)
2306
3420
if not tcp_server.clients:
2307
3421
logger.warning("No clients defined")
2313
pidfile.write(str(pid) + "\n".encode("utf-8"))
2316
logger.error("Could not write to file %r with PID %d",
2319
# "pidfile" was never created
3424
if pidfile is not None:
3428
print(pid, file=pidfile)
3430
logger.error("Could not write to file %r with PID %d",
2321
3433
del pidfilename
2323
signal.signal(signal.SIGINT, signal.SIG_IGN)
2325
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2326
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
3435
for termsig in (signal.SIGHUP, signal.SIGTERM):
3436
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3437
lambda: main_loop.quit() and False)
2329
class MandosDBusService(dbus.service.Object):
3441
@alternate_dbus_interfaces(
3442
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3443
class MandosDBusService(DBusObjectWithObjectManager):
2330
3444
"""A D-Bus proxy object"""
2331
3446
def __init__(self):
2332
3447
dbus.service.Object.__init__(self, bus, "/")
2333
3449
_interface = "se.recompile.Mandos"
2335
3451
@dbus.service.signal(_interface, signature="o")
2336
3452
def ClientAdded(self, objpath):
2340
3456
@dbus.service.signal(_interface, signature="ss")
2341
def ClientNotFound(self, fingerprint, address):
3457
def ClientNotFound(self, key_id, address):
3461
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
2345
3463
@dbus.service.signal(_interface, signature="os")
2346
3464
def ClientRemoved(self, objpath, name):
3468
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
2350
3470
@dbus.service.method(_interface, out_signature="ao")
2351
3471
def GetAllClients(self):
2353
return dbus.Array(c.dbus_object_path
2355
tcp_server.clients.itervalues())
3473
return dbus.Array(c.dbus_object_path for c in
3474
tcp_server.clients.values())
3476
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
2357
3478
@dbus.service.method(_interface,
2358
3479
out_signature="a{oa{sv}}")
2359
3480
def GetAllClientsWithProperties(self):
2361
3482
return dbus.Dictionary(
2362
((c.dbus_object_path, c.GetAll(""))
2363
for c in tcp_server.clients.itervalues()),
3483
{c.dbus_object_path: c.GetAll(
3484
"se.recompile.Mandos.Client")
3485
for c in tcp_server.clients.values()},
2364
3486
signature="oa{sv}")
2366
3488
@dbus.service.method(_interface, in_signature="o")
2367
3489
def RemoveClient(self, object_path):
2369
for c in tcp_server.clients.itervalues():
3491
for c in tcp_server.clients.values():
2370
3492
if c.dbus_object_path == object_path:
2371
3493
del tcp_server.clients[c.name]
2372
3494
c.remove_from_connection()
2373
# Don't signal anything except ClientRemoved
3495
# Don't signal the disabling
2374
3496
c.disable(quiet=True)
2376
self.ClientRemoved(object_path, c.name)
3497
# Emit D-Bus signal for removal
3498
self.client_removed_signal(c)
2378
3500
raise KeyError(object_path)
2382
class MandosDBusServiceTransitional(MandosDBusService):
2383
__metaclass__ = AlternateDBusNamesMetaclass
2384
mandos_dbus_service = MandosDBusServiceTransitional()
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
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
2387
3548
"Cleanup function; run on exit"
2390
multiprocessing.active_children()
3552
mp.active_children()
2391
3554
if not (tcp_server.clients or client_settings):
2394
3557
# Store client before exiting. Secrets are encrypted with key
2395
3558
# based on what config file has. If config file is
2396
3559
# removed/edited, old secret will thus be unrecovable.
2398
with Crypto() as crypt:
2399
for client in tcp_server.clients.itervalues():
3561
with PGPEngine() as pgp:
3562
for client in tcp_server.clients.values():
2400
3563
key = client_settings[client.name]["secret"]
2401
client.encrypted_secret = crypt.encrypt(client.secret,
3564
client.encrypted_secret = pgp.encrypt(client.secret,
2403
3566
client_dict = {}
2405
# A list of attributes that will not be stored when
2407
exclude = set(("bus", "changedstate", "secret"))
2408
for name, typ in (inspect.getmembers
2409
(dbus.service.Object)):
3568
# 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
2410
3574
exclude.add(name)
2412
3576
client_dict["encrypted_secret"] = (client
2413
3577
.encrypted_secret)
2414
3578
for attr in client.client_structure:
2415
3579
if attr not in exclude:
2416
3580
client_dict[attr] = getattr(client, attr)
2418
clients.append(client_dict)
3582
clients[client.name] = client_dict
2419
3583
del client_settings[client.name]["secret"]
2422
with os.fdopen(os.open(stored_state_path,
2423
os.O_CREAT|os.O_WRONLY|os.O_TRUNC,
2424
0600), "wb") as stored_state:
2425
pickle.dump((clients, client_settings), stored_state)
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
3595
os.rename(tempname, stored_state_path)
2426
3596
except (IOError, OSError) as e:
2427
logger.warning("Could not save persistent state: {0}"
2429
if e.errno not in (errno.ENOENT, errno.EACCES):
3602
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
3603
logger.warning("Could not save persistent state: {}"
3604
.format(os.strerror(e.errno)))
3606
logger.warning("Could not save persistent state:",
2432
3610
# Delete all clients, and settings from config
2433
3611
while tcp_server.clients:
2434
3612
name, client = tcp_server.clients.popitem()
2436
3614
client.remove_from_connection()
2437
# Don't signal anything except ClientRemoved
3615
# Don't signal the disabling
2438
3616
client.disable(quiet=True)
3617
# Emit D-Bus signal for removal
2441
mandos_dbus_service.ClientRemoved(client
3619
mandos_dbus_service.client_removed_signal(client)
2444
3620
client_settings.clear()
2446
3622
atexit.register(cleanup)
2448
for client in tcp_server.clients.itervalues():
3624
for client in tcp_server.clients.values():
2451
mandos_dbus_service.ClientAdded(client.dbus_object_path)
3626
# Emit D-Bus signal for adding
3627
mandos_dbus_service.client_added_signal(client)
2452
3628
# Need to initiate checking of clients
2453
3629
if client.enabled:
2454
3630
client.init_checker()
2456
3632
tcp_server.enable()
2457
3633
tcp_server.server_activate()
2459
3635
# Find out what port we got
2460
service.port = tcp_server.socket.getsockname()[1]
3637
service.port = tcp_server.socket.getsockname()[1]
2462
3639
logger.info("Now listening on address %r, port %d,"
2463
" flowinfo %d, scope_id %d"
2464
% tcp_server.socket.getsockname())
3640
" flowinfo %d, scope_id %d",
3641
*tcp_server.socket.getsockname())
2466
logger.info("Now listening on address %r, port %d"
2467
% tcp_server.socket.getsockname())
2469
#service.interface = tcp_server.socket.getsockname()[3]
3643
logger.info("Now listening on address %r, port %d",
3644
*tcp_server.socket.getsockname())
3646
# service.interface = tcp_server.socket.getsockname()[3]
2472
# From the Avahi example code
2475
except dbus.exceptions.DBusException as error:
2476
logger.critical("DBusException: %s", error)
2479
# End of Avahi example code
2481
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2482
lambda *args, **kwargs:
2483
(tcp_server.handle_request
2484
(*args[2:], **kwargs) or True))
3650
# From the Avahi example code
3653
except dbus.exceptions.DBusException as error:
3654
logger.critical("D-Bus Exception", exc_info=error)
3657
# End of Avahi example code
3660
GLib.IOChannel.unix_new(tcp_server.fileno()),
3661
GLib.PRIORITY_DEFAULT, GLib.IO_IN,
3662
lambda *args, **kwargs: (tcp_server.handle_request
3663
(*args[2:], **kwargs) or True))
2486
3665
logger.debug("Starting main loop")
2487
3666
main_loop.run()
2488
3667
except AvahiError as error:
2489
logger.critical("AvahiError: %s", error)
3668
logger.critical("Avahi Error", exc_info=error)
2492
3671
except KeyboardInterrupt: