502
364
follow_name_owner_changes=True),
503
365
avahi.DBUS_INTERFACE_SERVER)
504
366
self.server.connect_to_signal("StateChanged",
505
self.server_state_changed)
367
self.server_state_changed)
506
368
self.server_state_changed(self.server.GetState())
509
370
class AvahiServiceToSyslog(AvahiService):
510
def rename(self, *args, **kwargs):
511
372
"""Add the new name to the syslog messages"""
512
ret = super(AvahiServiceToSyslog, self).rename(*args, **kwargs)
513
syslogger.setFormatter(logging.Formatter(
514
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
373
ret = AvahiService.rename(self)
374
syslogger.setFormatter(logging.Formatter
375
('Mandos (%s) [%%(process)d]:'
376
' %%(levelname)s: %%(message)s'
519
# Pretend that we have a GnuTLS module
521
"""This isn't so much a class as it is a module-like namespace."""
523
library = ctypes.util.find_library("gnutls")
525
library = ctypes.util.find_library("gnutls-deb0")
526
_library = ctypes.cdll.LoadLibrary(library)
529
# Unless otherwise indicated, the constants and types below are
530
# all from the gnutls/gnutls.h C header file.
541
E_NO_CERTIFICATE_FOUND = -49
546
KEYID_USE_SHA256 = 1 # gnutls/x509.h
547
OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
550
class session_int(ctypes.Structure):
552
session_t = ctypes.POINTER(session_int)
554
class certificate_credentials_st(ctypes.Structure):
556
certificate_credentials_t = ctypes.POINTER(
557
certificate_credentials_st)
558
certificate_type_t = ctypes.c_int
560
class datum_t(ctypes.Structure):
561
_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
562
('size', ctypes.c_uint)]
564
class openpgp_crt_int(ctypes.Structure):
566
openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
567
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
568
log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
569
credentials_type_t = ctypes.c_int
570
transport_ptr_t = ctypes.c_void_p
571
close_request_t = ctypes.c_int
574
class Error(Exception):
575
def __init__(self, message=None, code=None, args=()):
576
# Default usage is by a message string, but if a return
577
# code is passed, convert it to a string with
580
if message is None and code is not None:
581
message = gnutls.strerror(code)
582
return super(gnutls.Error, self).__init__(
585
class CertificateSecurityError(Error):
591
self._c_object = gnutls.certificate_credentials_t()
592
gnutls.certificate_allocate_credentials(
593
ctypes.byref(self._c_object))
594
self.type = gnutls.CRD_CERTIFICATE
597
gnutls.certificate_free_credentials(self._c_object)
600
def __init__(self, socket, credentials=None):
601
self._c_object = gnutls.session_t()
602
gnutls_flags = gnutls.CLIENT
603
if gnutls.check_version(b"3.5.6"):
604
gnutls_flags |= gnutls.NO_TICKETS
606
gnutls_flags |= gnutls.ENABLE_RAWPK
607
gnutls.init(ctypes.byref(self._c_object), gnutls_flags)
609
gnutls.set_default_priority(self._c_object)
610
gnutls.transport_set_ptr(self._c_object, socket.fileno())
611
gnutls.handshake_set_private_extensions(self._c_object,
614
if credentials is None:
615
credentials = gnutls.Credentials()
616
gnutls.credentials_set(self._c_object, credentials.type,
617
ctypes.cast(credentials._c_object,
619
self.credentials = credentials
622
gnutls.deinit(self._c_object)
625
return gnutls.handshake(self._c_object)
627
def send(self, data):
631
data_len -= gnutls.record_send(self._c_object,
636
return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
638
# Error handling functions
639
def _error_code(result):
640
"""A function to raise exceptions on errors, suitable
641
for the 'restype' attribute on ctypes functions"""
644
if result == gnutls.E_NO_CERTIFICATE_FOUND:
645
raise gnutls.CertificateSecurityError(code=result)
646
raise gnutls.Error(code=result)
648
def _retry_on_error(result, func, arguments):
649
"""A function to retry on some errors, suitable
650
for the 'errcheck' attribute on ctypes functions"""
652
if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
653
return _error_code(result)
654
result = func(*arguments)
657
# Unless otherwise indicated, the function declarations below are
658
# all from the gnutls/gnutls.h C header file.
661
priority_set_direct = _library.gnutls_priority_set_direct
662
priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
663
ctypes.POINTER(ctypes.c_char_p)]
664
priority_set_direct.restype = _error_code
666
init = _library.gnutls_init
667
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
668
init.restype = _error_code
670
set_default_priority = _library.gnutls_set_default_priority
671
set_default_priority.argtypes = [session_t]
672
set_default_priority.restype = _error_code
674
record_send = _library.gnutls_record_send
675
record_send.argtypes = [session_t, ctypes.c_void_p,
677
record_send.restype = ctypes.c_ssize_t
678
record_send.errcheck = _retry_on_error
680
certificate_allocate_credentials = (
681
_library.gnutls_certificate_allocate_credentials)
682
certificate_allocate_credentials.argtypes = [
683
ctypes.POINTER(certificate_credentials_t)]
684
certificate_allocate_credentials.restype = _error_code
686
certificate_free_credentials = (
687
_library.gnutls_certificate_free_credentials)
688
certificate_free_credentials.argtypes = [
689
certificate_credentials_t]
690
certificate_free_credentials.restype = None
692
handshake_set_private_extensions = (
693
_library.gnutls_handshake_set_private_extensions)
694
handshake_set_private_extensions.argtypes = [session_t,
696
handshake_set_private_extensions.restype = None
698
credentials_set = _library.gnutls_credentials_set
699
credentials_set.argtypes = [session_t, credentials_type_t,
701
credentials_set.restype = _error_code
703
strerror = _library.gnutls_strerror
704
strerror.argtypes = [ctypes.c_int]
705
strerror.restype = ctypes.c_char_p
707
certificate_type_get = _library.gnutls_certificate_type_get
708
certificate_type_get.argtypes = [session_t]
709
certificate_type_get.restype = _error_code
711
certificate_get_peers = _library.gnutls_certificate_get_peers
712
certificate_get_peers.argtypes = [session_t,
713
ctypes.POINTER(ctypes.c_uint)]
714
certificate_get_peers.restype = ctypes.POINTER(datum_t)
716
global_set_log_level = _library.gnutls_global_set_log_level
717
global_set_log_level.argtypes = [ctypes.c_int]
718
global_set_log_level.restype = None
720
global_set_log_function = _library.gnutls_global_set_log_function
721
global_set_log_function.argtypes = [log_func]
722
global_set_log_function.restype = None
724
deinit = _library.gnutls_deinit
725
deinit.argtypes = [session_t]
726
deinit.restype = None
728
handshake = _library.gnutls_handshake
729
handshake.argtypes = [session_t]
730
handshake.restype = _error_code
731
handshake.errcheck = _retry_on_error
733
transport_set_ptr = _library.gnutls_transport_set_ptr
734
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
735
transport_set_ptr.restype = None
737
bye = _library.gnutls_bye
738
bye.argtypes = [session_t, close_request_t]
739
bye.restype = _error_code
740
bye.errcheck = _retry_on_error
742
check_version = _library.gnutls_check_version
743
check_version.argtypes = [ctypes.c_char_p]
744
check_version.restype = ctypes.c_char_p
746
_need_version = b"3.3.0"
747
if check_version(_need_version) is None:
748
raise self.Error("Needs GnuTLS {} or later"
749
.format(_need_version))
751
_tls_rawpk_version = b"3.6.6"
752
has_rawpk = bool(check_version(_tls_rawpk_version))
756
class pubkey_st(ctypes.Structure):
758
pubkey_t = ctypes.POINTER(pubkey_st)
760
x509_crt_fmt_t = ctypes.c_int
762
# All the function declarations below are from gnutls/abstract.h
763
pubkey_init = _library.gnutls_pubkey_init
764
pubkey_init.argtypes = [ctypes.POINTER(pubkey_t)]
765
pubkey_init.restype = _error_code
767
pubkey_import = _library.gnutls_pubkey_import
768
pubkey_import.argtypes = [pubkey_t, ctypes.POINTER(datum_t),
770
pubkey_import.restype = _error_code
772
pubkey_get_key_id = _library.gnutls_pubkey_get_key_id
773
pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,
774
ctypes.POINTER(ctypes.c_ubyte),
775
ctypes.POINTER(ctypes.c_size_t)]
776
pubkey_get_key_id.restype = _error_code
778
pubkey_deinit = _library.gnutls_pubkey_deinit
779
pubkey_deinit.argtypes = [pubkey_t]
780
pubkey_deinit.restype = None
782
# All the function declarations below are from gnutls/openpgp.h
784
openpgp_crt_init = _library.gnutls_openpgp_crt_init
785
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
786
openpgp_crt_init.restype = _error_code
788
openpgp_crt_import = _library.gnutls_openpgp_crt_import
789
openpgp_crt_import.argtypes = [openpgp_crt_t,
790
ctypes.POINTER(datum_t),
792
openpgp_crt_import.restype = _error_code
794
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
795
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
796
ctypes.POINTER(ctypes.c_uint)]
797
openpgp_crt_verify_self.restype = _error_code
799
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
800
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
801
openpgp_crt_deinit.restype = None
803
openpgp_crt_get_fingerprint = (
804
_library.gnutls_openpgp_crt_get_fingerprint)
805
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
809
openpgp_crt_get_fingerprint.restype = _error_code
811
if check_version(b"3.6.4"):
812
certificate_type_get2 = _library.gnutls_certificate_type_get2
813
certificate_type_get2.argtypes = [session_t, ctypes.c_int]
814
certificate_type_get2.restype = _error_code
816
# Remove non-public functions
817
del _error_code, _retry_on_error
820
def call_pipe(connection, # : multiprocessing.Connection
821
func, *args, **kwargs):
822
"""This function is meant to be called by multiprocessing.Process
824
This function runs func(*args, **kwargs), and writes the resulting
825
return value on the provided multiprocessing.Connection.
827
connection.send(func(*args, **kwargs))
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):
832
387
"""A representation of a client host served by this server.
835
approved: bool(); 'None' if not yet approved/disapproved
390
_approved: bool(); 'None' if not yet approved/disapproved
836
391
approval_delay: datetime.timedelta(); Time to wait for approval
837
392
approval_duration: datetime.timedelta(); Duration of one approval
838
checker: multiprocessing.Process(); a running checker process used
839
to see if the client lives. 'None' if no process is
841
checker_callback_tag: a GLib event source tag, or None
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
842
397
checker_command: string; External command which is run to check
843
398
if client lives. %() expansions are done at
844
399
runtime with vars(self) as dict, so that for
845
400
instance %(name)s can be used in the command.
846
checker_initiator_tag: a GLib event source tag, or None
401
checker_initiator_tag: a gobject event source tag, or None
847
402
created: datetime.datetime(); (UTC) object creation
848
403
client_structure: Object describing what attributes a client has
849
404
and is used for storing the client at exit
850
405
current_checker_command: string; current running checker_command
851
disable_initiator_tag: a GLib event source tag, or None
406
disable_initiator_tag: a gobject event source tag, or None
853
408
fingerprint: string (40 or 32 hexadecimal digits); used to
854
uniquely identify an OpenPGP client
855
key_id: string (64 hexadecimal digits); used to uniquely identify
856
a client using raw public keys
409
uniquely identify the client
857
410
host: string; available for use by the checker command
858
411
interval: datetime.timedelta(); How often to start a new checker
859
412
last_approval_request: datetime.datetime(); (UTC) or None
860
413
last_checked_ok: datetime.datetime(); (UTC) or None
861
415
last_checker_status: integer between 0 and 255 reflecting exit
862
416
status of last checker. -1 reflects crashed
863
checker, -2 means no checker completed yet.
864
last_checker_signal: The signal which killed the last checker, if
865
last_checker_status is -1
866
last_enabled: datetime.datetime(); (UTC) or None
418
last_enabled: datetime.datetime(); (UTC)
867
419
name: string; from the config file, used in log messages and
868
420
D-Bus identifiers
869
421
secret: bytestring; sent verbatim (over TLS) to client
870
422
timeout: datetime.timedelta(); How long from last_checked_ok
871
423
until this client is disabled
872
extended_timeout: extra long timeout when secret has been sent
424
extended_timeout: extra long timeout when password has been sent
873
425
runtime_expansions: Allowed attributes for runtime expansion.
874
426
expires: datetime.datetime(); time (UTC) when a client will be
875
427
disabled, or None
876
server_settings: The server_settings dict from main()
879
430
runtime_expansions = ("approval_delay", "approval_duration",
880
"created", "enabled", "expires", "key_id",
881
"fingerprint", "host", "interval",
882
"last_approval_request", "last_checked_ok",
431
"created", "enabled", "fingerprint",
432
"host", "interval", "last_checked_ok",
883
433
"last_enabled", "name", "timeout")
886
"extended_timeout": "PT15M",
888
"checker": "fping -q -- %%(host)s",
890
"approval_delay": "PT0S",
891
"approval_duration": "PT1S",
892
"approved_by_default": "True",
897
def config_parser(config):
898
"""Construct a new dict of client settings of this form:
899
{ client_name: {setting_name: value, ...}, ...}
900
with exceptions for any special settings as defined above.
901
NOTE: Must be a pure function. Must return the same result
902
value given the same arguments.
905
for client_name in config.sections():
906
section = dict(config.items(client_name))
907
client = settings[client_name] = {}
909
client["host"] = section["host"]
910
# Reformat values from string types to Python types
911
client["approved_by_default"] = config.getboolean(
912
client_name, "approved_by_default")
913
client["enabled"] = config.getboolean(client_name,
916
# Uppercase and remove spaces from key_id and fingerprint
917
# for later comparison purposes with return value from the
918
# key_id() and fingerprint() functions
919
client["key_id"] = (section.get("key_id", "").upper()
921
client["fingerprint"] = (section["fingerprint"].upper()
923
if "secret" in section:
924
client["secret"] = codecs.decode(section["secret"]
927
elif "secfile" in section:
928
with open(os.path.expanduser(os.path.expandvars
929
(section["secfile"])),
931
client["secret"] = secfile.read()
933
raise TypeError("No secret or secfile for section {}"
935
client["timeout"] = string_to_delta(section["timeout"])
936
client["extended_timeout"] = string_to_delta(
937
section["extended_timeout"])
938
client["interval"] = string_to_delta(section["interval"])
939
client["approval_delay"] = string_to_delta(
940
section["approval_delay"])
941
client["approval_duration"] = string_to_delta(
942
section["approval_duration"])
943
client["checker_command"] = section["checker"]
944
client["last_approval_request"] = None
945
client["last_checked_ok"] = None
946
client["last_checker_status"] = -2
950
def __init__(self, settings, name=None, server_settings=None):
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'
952
if server_settings is None:
954
self.server_settings = server_settings
955
# adding all client settings
956
for setting, value in settings.items():
957
setattr(self, setting, value)
960
if not hasattr(self, "last_enabled"):
961
self.last_enabled = datetime.datetime.utcnow()
962
if not hasattr(self, "expires"):
963
self.expires = (datetime.datetime.utcnow()
966
self.last_enabled = None
969
457
logger.debug("Creating client %r", self.name)
970
logger.debug(" Key ID: %s", self.key_id)
458
# Uppercase and remove spaces from fingerprint for later
459
# comparison purposes with return value from the fingerprint()
461
self.fingerprint = (config["fingerprint"].upper()
971
463
logger.debug(" Fingerprint: %s", self.fingerprint)
972
self.created = settings.get("created",
973
datetime.datetime.utcnow())
975
# attributes specific for this server instance
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()
477
self.last_approval_request = None
478
self.last_enabled = datetime.datetime.utcnow()
479
self.last_checked_ok = None
480
self.last_checker_status = None
481
self.timeout = string_to_delta(config["timeout"])
482
self.extended_timeout = string_to_delta(config
483
["extended_timeout"])
484
self.interval = string_to_delta(config["interval"])
976
485
self.checker = None
977
486
self.checker_initiator_tag = None
978
487
self.disable_initiator_tag = None
488
self.expires = datetime.datetime.utcnow() + self.timeout
979
489
self.checker_callback_tag = None
490
self.checker_command = config["checker"]
980
491
self.current_checker_command = None
492
self._approved = None
493
self.approved_by_default = config.get("approved_by_default",
982
495
self.approvals_pending = 0
983
self.changedstate = multiprocessing_manager.Condition(
984
multiprocessing_manager.Lock())
985
self.client_structure = [attr
986
for attr in self.__dict__.keys()
496
self.approval_delay = string_to_delta(
497
config["approval_delay"])
498
self.approval_duration = string_to_delta(
499
config["approval_duration"])
500
self.changedstate = (multiprocessing_manager
501
.Condition(multiprocessing_manager
503
self.client_structure = [attr for attr in
504
self.__dict__.iterkeys()
987
505
if not attr.startswith("_")]
988
506
self.client_structure.append("client_structure")
990
for name, t in inspect.getmembers(
991
type(self), lambda obj: isinstance(obj, property)):
508
for name, t in inspect.getmembers(type(self),
992
512
if not name.startswith("_"):
993
513
self.client_structure.append(name)
995
515
# Send notice to process children that client state has changed
996
516
def send_changedstate(self):
997
517
with self.changedstate:
998
518
self.changedstate.notify_all()
1000
520
def enable(self):
1001
521
"""Start this client's checker and timeout hooks"""
1002
522
if getattr(self, "enabled", False):
1003
523
# Already enabled
525
self.send_changedstate()
1005
526
self.expires = datetime.datetime.utcnow() + self.timeout
1006
527
self.enabled = True
1007
528
self.last_enabled = datetime.datetime.utcnow()
1008
529
self.init_checker()
1009
self.send_changedstate()
1011
531
def disable(self, quiet=True):
1012
532
"""Disable this client."""
1013
533
if not getattr(self, "enabled", False):
536
self.send_changedstate()
1016
538
logger.info("Disabling client %s", self.name)
1017
if getattr(self, "disable_initiator_tag", None) is not None:
1018
GLib.source_remove(self.disable_initiator_tag)
539
if getattr(self, "disable_initiator_tag", False):
540
gobject.source_remove(self.disable_initiator_tag)
1019
541
self.disable_initiator_tag = None
1020
542
self.expires = None
1021
if getattr(self, "checker_initiator_tag", None) is not None:
1022
GLib.source_remove(self.checker_initiator_tag)
543
if getattr(self, "checker_initiator_tag", False):
544
gobject.source_remove(self.checker_initiator_tag)
1023
545
self.checker_initiator_tag = None
1024
546
self.stop_checker()
1025
547
self.enabled = False
1027
self.send_changedstate()
1028
# Do not run this again if called by a GLib.timeout_add
548
# Do not run this again if called by a gobject.timeout_add
1031
551
def __del__(self):
1034
554
def init_checker(self):
1035
555
# Schedule a new checker to be started an 'interval' from now,
1036
556
# and every interval from then on.
1037
if self.checker_initiator_tag is not None:
1038
GLib.source_remove(self.checker_initiator_tag)
1039
self.checker_initiator_tag = GLib.timeout_add(
1040
int(self.interval.total_seconds() * 1000),
557
self.checker_initiator_tag = (gobject.timeout_add
558
(self.interval_milliseconds(),
1042
560
# Schedule a disable() when 'timeout' has passed
1043
if self.disable_initiator_tag is not None:
1044
GLib.source_remove(self.disable_initiator_tag)
1045
self.disable_initiator_tag = GLib.timeout_add(
1046
int(self.timeout.total_seconds() * 1000), self.disable)
561
self.disable_initiator_tag = (gobject.timeout_add
562
(self.timeout_milliseconds(),
1047
564
# Also start a new checker *right now*.
1048
565
self.start_checker()
1050
def checker_callback(self, source, condition, connection,
567
def checker_callback(self, pid, condition, command):
1052
568
"""The checker has completed, so take appropriate actions."""
1053
# Read return code from connection (see call_pipe)
1054
returncode = connection.recv()
1056
if self.checker is not None:
1058
569
self.checker_callback_tag = None
1059
570
self.checker = None
1062
self.last_checker_status = returncode
1063
self.last_checker_signal = None
571
if os.WIFEXITED(condition):
572
self.last_checker_status = os.WEXITSTATUS(condition)
1064
573
if self.last_checker_status == 0:
1065
574
logger.info("Checker for %(name)s succeeded",
1067
576
self.checked_ok()
1069
logger.info("Checker for %(name)s failed", vars(self))
578
logger.info("Checker for %(name)s failed",
1071
581
self.last_checker_status = -1
1072
self.last_checker_signal = -returncode
1073
582
logger.warning("Checker for %(name)s crashed?",
1077
def checked_ok(self):
1078
"""Assert that the client has been seen, alive and well."""
1079
self.last_checked_ok = datetime.datetime.utcnow()
1080
self.last_checker_status = 0
1081
self.last_checker_signal = None
1084
def bump_timeout(self, timeout=None):
1085
"""Bump up the timeout for this client."""
585
def checked_ok(self, timeout=None):
586
"""Bump up the timeout for this client.
588
This should only be called when the client has been seen,
1086
591
if timeout is None:
1087
592
timeout = self.timeout
593
self.last_checked_ok = datetime.datetime.utcnow()
1088
594
if self.disable_initiator_tag is not None:
1089
GLib.source_remove(self.disable_initiator_tag)
1090
self.disable_initiator_tag = None
595
gobject.source_remove(self.disable_initiator_tag)
1091
596
if getattr(self, "enabled", False):
1092
self.disable_initiator_tag = GLib.timeout_add(
1093
int(timeout.total_seconds() * 1000), self.disable)
597
self.disable_initiator_tag = (gobject.timeout_add
598
(_timedelta_to_milliseconds
599
(timeout), self.disable))
1094
600
self.expires = datetime.datetime.utcnow() + timeout
1096
602
def need_approval(self):
1097
603
self.last_approval_request = datetime.datetime.utcnow()
1099
605
def start_checker(self):
1100
606
"""Start a new checker subprocess if one is not running.
1102
608
If a checker already exists, leave it running and do
1104
610
# The reason for not killing a running checker is that if we
1105
# did that, and if a checker (for some reason) started running
1106
# slowly and taking more than 'interval' time, then the client
1107
# would inevitably timeout, since no checker would get a
1108
# chance to run to completion. If we instead leave running
611
# did that, then if a checker (for some reason) started
612
# running slowly and taking more than 'interval' time, the
613
# client would inevitably timeout, since no checker would get
614
# a chance to run to completion. If we instead leave running
1109
615
# checkers alone, the checker would have to take more time
1110
616
# than 'timeout' for the client to be disabled, which is as it
1113
if self.checker is not None and not self.checker.is_alive():
1114
logger.warning("Checker was not alive; joining")
619
# If a checker exists, make sure it is not a zombie
621
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
622
except (AttributeError, OSError) as error:
623
if (isinstance(error, OSError)
624
and error.errno != errno.ECHILD):
628
logger.warning("Checker was a zombie")
629
gobject.source_remove(self.checker_callback_tag)
630
self.checker_callback(pid, status,
631
self.current_checker_command)
1117
632
# Start a new checker if needed
1118
633
if self.checker is None:
1119
# Escape attributes for the shell
1121
attr: re.escape(str(getattr(self, attr)))
1122
for attr in self.runtime_expansions}
1124
command = self.checker_command % escaped_attrs
1125
except TypeError as error:
1126
logger.error('Could not format string "%s"',
1127
self.checker_command,
1129
return True # Try again later
635
# In case checker_command has exactly one % operator
636
command = self.checker_command % self.host
638
# Escape attributes for the shell
639
escaped_attrs = dict(
641
re.escape(unicode(str(getattr(self, attr, "")),
645
self.runtime_expansions)
648
command = self.checker_command % escaped_attrs
649
except TypeError as error:
650
logger.error('Could not format string "%s":'
651
' %s', self.checker_command, error)
652
return True # Try again later
1130
653
self.current_checker_command = command
1131
logger.info("Starting checker %r for %s", command,
1133
# We don't need to redirect stdout and stderr, since
1134
# in normal mode, that is already done by daemon(),
1135
# and in debug mode we don't want to. (Stdin is
1136
# always replaced by /dev/null.)
1137
# The exception is when not debugging but nevertheless
1138
# running in the foreground; use the previously
1140
popen_args = {"close_fds": True,
1143
if (not self.server_settings["debug"]
1144
and self.server_settings["foreground"]):
1145
popen_args.update({"stdout": wnull,
1147
pipe = multiprocessing.Pipe(duplex=False)
1148
self.checker = multiprocessing.Process(
1150
args=(pipe[1], subprocess.call, command),
1152
self.checker.start()
1153
self.checker_callback_tag = GLib.io_add_watch(
1154
GLib.IOChannel.unix_new(pipe[0].fileno()),
1155
GLib.PRIORITY_DEFAULT, GLib.IO_IN,
1156
self.checker_callback, pipe[0], command)
1157
# Re-run this periodically if run by GLib.timeout_add
655
logger.info("Starting checker %r for %s",
657
# We don't need to redirect stdout and stderr, since
658
# in normal mode, that is already done by daemon(),
659
# and in debug mode we don't want to. (Stdin is
660
# always replaced by /dev/null.)
661
self.checker = subprocess.Popen(command,
664
self.checker_callback_tag = (gobject.child_watch_add
666
self.checker_callback,
668
# The checker may have completed before the gobject
669
# watch was added. Check for this.
670
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
672
gobject.source_remove(self.checker_callback_tag)
673
self.checker_callback(pid, status, command)
674
except OSError as error:
675
logger.error("Failed to start subprocess: %s",
677
# Re-run this periodically if run by gobject.timeout_add
1160
680
def stop_checker(self):
1161
681
"""Force the checker process, if any, to stop."""
1162
682
if self.checker_callback_tag:
1163
GLib.source_remove(self.checker_callback_tag)
683
gobject.source_remove(self.checker_callback_tag)
1164
684
self.checker_callback_tag = None
1165
685
if getattr(self, "checker", None) is None:
1167
687
logger.debug("Stopping checker for %(name)s", vars(self))
1168
self.checker.terminate()
689
os.kill(self.checker.pid, signal.SIGTERM)
691
#if self.checker.poll() is None:
692
# os.kill(self.checker.pid, signal.SIGKILL)
693
except OSError as error:
694
if error.errno != errno.ESRCH: # No such process
1169
696
self.checker = None
1172
def dbus_service_property(dbus_interface,
699
def dbus_service_property(dbus_interface, signature="v",
700
access="readwrite", byte_arrays=False):
1176
701
"""Decorators for marking methods of a DBusObjectWithProperties to
1177
702
become properties on the D-Bus.
1179
704
The decorated method will be called with no arguments by "Get"
1180
705
and with one argument by "Set".
1182
707
The parameters, where they are supported, are the same as
1183
708
dbus.service.method, except there is only "signature", since the
1184
709
type from Get() and the type sent to Set() is the same.
1517
879
except (AttributeError, xml.dom.DOMException,
1518
880
xml.parsers.expat.ExpatError) as error:
1519
881
logger.error("Failed to override Introspection method",
1525
dbus.OBJECT_MANAGER_IFACE
1526
except AttributeError:
1527
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1530
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1531
"""A D-Bus object with an ObjectManager.
1533
Classes inheriting from this exposes the standard
1534
GetManagedObjects call and the InterfacesAdded and
1535
InterfacesRemoved signals on the standard
1536
"org.freedesktop.DBus.ObjectManager" interface.
1538
Note: No signals are sent automatically; they must be sent
1541
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1542
out_signature="a{oa{sa{sv}}}")
1543
def GetManagedObjects(self):
1544
"""This function must be overridden"""
1545
raise NotImplementedError()
1547
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1548
signature="oa{sa{sv}}")
1549
def InterfacesAdded(self, object_path, interfaces_and_properties):
1552
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1553
def InterfacesRemoved(self, object_path, interfaces):
1556
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1558
path_keyword='object_path',
1559
connection_keyword='connection')
1560
def Introspect(self, object_path, connection):
1561
"""Overloading of standard D-Bus method.
1563
Override return argument name of GetManagedObjects to be
1564
"objpath_interfaces_and_properties"
1566
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1570
document = xml.dom.minidom.parseString(xmlstring)
1572
for if_tag in document.getElementsByTagName("interface"):
1573
# Fix argument name for the GetManagedObjects method
1574
if (if_tag.getAttribute("name")
1575
== dbus.OBJECT_MANAGER_IFACE):
1576
for cn in if_tag.getElementsByTagName("method"):
1577
if (cn.getAttribute("name")
1578
== "GetManagedObjects"):
1579
for arg in cn.getElementsByTagName("arg"):
1580
if (arg.getAttribute("direction")
1584
"objpath_interfaces"
1586
xmlstring = document.toxml("utf-8")
1588
except (AttributeError, xml.dom.DOMException,
1589
xml.parsers.expat.ExpatError) as error:
1590
logger.error("Failed to override Introspection method",
1595
def datetime_to_dbus(dt, variant_level=0):
886
def datetime_to_dbus (dt, variant_level=0):
1596
887
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1598
return dbus.String("", variant_level=variant_level)
1599
return dbus.String(dt.isoformat(), variant_level=variant_level)
1602
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1603
"""A class decorator; applied to a subclass of
1604
dbus.service.Object, it will add alternate D-Bus attributes with
1605
interface names according to the "alt_interface_names" mapping.
1608
@alternate_dbus_interfaces({"org.example.Interface":
1609
"net.example.AlternateInterface"})
1610
class SampleDBusObject(dbus.service.Object):
1611
@dbus.service.method("org.example.Interface")
1612
def SampleDBusMethod():
1615
The above "SampleDBusMethod" on "SampleDBusObject" will be
1616
reachable via two interfaces: "org.example.Interface" and
1617
"net.example.AlternateInterface", the latter of which will have
1618
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1619
"true", unless "deprecate" is passed with a False value.
1621
This works for methods and signals, and also for D-Bus properties
1622
(from DBusObjectWithProperties) and interfaces (from the
1623
dbus_interface_annotations decorator).
889
return dbus.String("", variant_level = variant_level)
890
return dbus.String(dt.isoformat(),
891
variant_level=variant_level)
894
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
896
"""Applied to an empty subclass of a D-Bus object, this metaclass
897
will add additional D-Bus attributes matching a certain pattern.
1627
for orig_interface_name, alt_interface_name in (
1628
alt_interface_names.items()):
1630
interface_names = set()
1631
# Go though all attributes of the class
1632
for attrname, attribute in inspect.getmembers(cls):
899
def __new__(mcs, name, bases, attr):
900
# Go through all the base classes which could have D-Bus
901
# methods, signals, or properties in them
902
for base in (b for b in bases
903
if issubclass(b, dbus.service.Object)):
904
# Go though all attributes of the base class
905
for attrname, attribute in inspect.getmembers(base):
1633
906
# Ignore non-D-Bus attributes, and D-Bus attributes
1634
907
# with the wrong interface name
1635
908
if (not hasattr(attribute, "_dbus_interface")
1636
or not attribute._dbus_interface.startswith(
1637
orig_interface_name)):
909
or not attribute._dbus_interface
910
.startswith("se.recompile.Mandos")):
1639
912
# Create an alternate D-Bus interface name based on
1640
913
# the current name
1641
alt_interface = attribute._dbus_interface.replace(
1642
orig_interface_name, alt_interface_name)
1643
interface_names.add(alt_interface)
914
alt_interface = (attribute._dbus_interface
915
.replace("se.recompile.Mandos",
916
"se.bsnet.fukt.Mandos"))
1644
917
# Is this a D-Bus signal?
1645
918
if getattr(attribute, "_dbus_is_signal", False):
1646
# Extract the original non-method undecorated
1647
# function by black magic
1648
if sys.version_info.major == 2:
1649
nonmethod_func = (dict(
919
# Extract the original non-method function by
921
nonmethod_func = (dict(
1650
922
zip(attribute.func_code.co_freevars,
1651
attribute.__closure__))
1652
["func"].cell_contents)
1654
nonmethod_func = (dict(
1655
zip(attribute.__code__.co_freevars,
1656
attribute.__closure__))
1657
["func"].cell_contents)
923
attribute.__closure__))["func"]
1658
925
# Create a new, but exactly alike, function
1659
926
# object, and decorate it to be a new D-Bus signal
1660
927
# with the alternate D-Bus interface name
1661
new_function = copy_function(nonmethod_func)
1662
new_function = (dbus.service.signal(
1664
attribute._dbus_signature)(new_function))
1665
# Copy annotations, if any
1667
new_function._dbus_annotations = dict(
1668
attribute._dbus_annotations)
1669
except AttributeError:
928
new_function = (dbus.service.signal
930
attribute._dbus_signature)
932
nonmethod_func.func_code,
933
nonmethod_func.func_globals,
934
nonmethod_func.func_name,
935
nonmethod_func.func_defaults,
936
nonmethod_func.func_closure)))
1672
937
# Define a creator of a function to call both the
1673
# original and alternate functions, so both the
1674
# original and alternate signals gets sent when
1675
# the function is called
938
# old and new functions, so both the old and new
939
# signals gets sent when the function is called
1676
940
def fixscope(func1, func2):
1677
941
"""This function is a scope container to pass
1678
942
func1 and func2 to the "call_both" function
1679
943
outside of its arguments"""
1681
@functools.wraps(func2)
1682
944
def call_both(*args, **kwargs):
1683
945
"""This function will emit two D-Bus
1684
946
signals by calling func1 and func2"""
1685
947
func1(*args, **kwargs)
1686
948
func2(*args, **kwargs)
1687
# Make wrapper function look like a D-Bus
1689
for name, attr in inspect.getmembers(func2):
1690
if name.startswith("_dbus_"):
1691
setattr(call_both, name, attr)
1693
949
return call_both
1694
950
# Create the "call_both" function and add it to
1696
attr[attrname] = fixscope(attribute, new_function)
952
attr[attrname] = fixscope(attribute,
1697
954
# Is this a D-Bus method?
1698
955
elif getattr(attribute, "_dbus_is_method", False):
1699
956
# Create a new, but exactly alike, function
1700
957
# object. Decorate it to be a new D-Bus method
1701
958
# with the alternate D-Bus interface name. Add it
1704
dbus.service.method(
1706
attribute._dbus_in_signature,
1707
attribute._dbus_out_signature)
1708
(copy_function(attribute)))
1709
# Copy annotations, if any
1711
attr[attrname]._dbus_annotations = dict(
1712
attribute._dbus_annotations)
1713
except AttributeError:
960
attr[attrname] = (dbus.service.method
962
attribute._dbus_in_signature,
963
attribute._dbus_out_signature)
965
(attribute.func_code,
966
attribute.func_globals,
968
attribute.func_defaults,
969
attribute.func_closure)))
1715
970
# Is this a D-Bus property?
1716
971
elif getattr(attribute, "_dbus_is_property", False):
1717
972
# Create a new, but exactly alike, function
1718
973
# object, and decorate it to be a new D-Bus
1719
974
# property with the alternate D-Bus interface
1720
975
# name. Add it to the class.
1721
attr[attrname] = (dbus_service_property(
1722
alt_interface, attribute._dbus_signature,
1723
attribute._dbus_access,
1724
attribute._dbus_get_args_options
1726
(copy_function(attribute)))
1727
# Copy annotations, if any
1729
attr[attrname]._dbus_annotations = dict(
1730
attribute._dbus_annotations)
1731
except AttributeError:
1733
# Is this a D-Bus interface?
1734
elif getattr(attribute, "_dbus_is_interface", False):
1735
# Create a new, but exactly alike, function
1736
# object. Decorate it to be a new D-Bus interface
1737
# with the alternate D-Bus interface name. Add it
1740
dbus_interface_annotations(alt_interface)
1741
(copy_function(attribute)))
1743
# Deprecate all alternate interfaces
1744
iname = "_AlternateDBusNames_interface_annotation{}"
1745
for interface_name in interface_names:
1747
@dbus_interface_annotations(interface_name)
1749
return {"org.freedesktop.DBus.Deprecated":
1751
# Find an unused name
1752
for aname in (iname.format(i)
1753
for i in itertools.count()):
1754
if aname not in attr:
1758
# Replace the class with a new subclass of it with
1759
# methods, signals, etc. as created above.
1760
if sys.version_info.major == 2:
1761
cls = type(b"{}Alternate".format(cls.__name__),
1764
cls = type("{}Alternate".format(cls.__name__),
1771
@alternate_dbus_interfaces({"se.recompile.Mandos":
1772
"se.bsnet.fukt.Mandos"})
976
attr[attrname] = (dbus_service_property
978
attribute._dbus_signature,
979
attribute._dbus_access,
981
._dbus_get_args_options
984
(attribute.func_code,
985
attribute.func_globals,
987
attribute.func_defaults,
988
attribute.func_closure)))
989
return type.__new__(mcs, name, bases, attr)
1773
992
class ClientDBus(Client, DBusObjectWithProperties):
1774
993
"""A Client class using D-Bus
1777
996
dbus_object_path: dbus.ObjectPath
1778
997
bus: dbus.SystemBus()
1781
1000
runtime_expansions = (Client.runtime_expansions
1782
+ ("dbus_object_path", ))
1784
_interface = "se.recompile.Mandos.Client"
1001
+ ("dbus_object_path",))
1786
1003
# dbus.service.Object doesn't use super(), so we can't either.
1788
def __init__(self, bus=None, *args, **kwargs):
1005
def __init__(self, bus = None, *args, **kwargs):
1790
1007
Client.__init__(self, *args, **kwargs)
1009
self._approvals_pending = 0
1791
1010
# Only now, when this client is initialized, can it show up on
1793
client_object_name = str(self.name).translate(
1012
client_object_name = unicode(self.name).translate(
1794
1013
{ord("."): ord("_"),
1795
1014
ord("-"): ord("_")})
1796
self.dbus_object_path = dbus.ObjectPath(
1797
"/clients/" + client_object_name)
1015
self.dbus_object_path = (dbus.ObjectPath
1016
("/clients/" + client_object_name))
1798
1017
DBusObjectWithProperties.__init__(self, self.bus,
1799
1018
self.dbus_object_path)
1801
def notifychangeproperty(transform_func, dbus_name,
1802
type_func=lambda x: x,
1804
invalidate_only=False,
1805
_interface=_interface):
1020
def notifychangeproperty(transform_func,
1021
dbus_name, type_func=lambda x: x,
1806
1023
""" Modify a variable so that it's a property which announces
1807
1024
its changes to DBus.
1809
1026
transform_fun: Function that takes a value and a variant_level
1810
1027
and transforms it to a D-Bus type.
1811
1028
dbus_name: D-Bus name of the variable
2202
1384
self.start_checker()
2204
1386
self.stop_checker()
2206
1388
# ObjectPath - property
2208
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
2209
"org.freedesktop.DBus.Deprecated": "true"})
2210
1389
@dbus_service_property(_interface, signature="o", access="read")
2211
1390
def ObjectPath_dbus_property(self):
2212
return self.dbus_object_path # is already a dbus.ObjectPath
1391
return self.dbus_object_path # is already a dbus.ObjectPath
2214
1393
# Secret = property
2216
{"org.freedesktop.DBus.Property.EmitsChangedSignal":
2218
@dbus_service_property(_interface,
1394
@dbus_service_property(_interface, signature="ay",
1395
access="write", byte_arrays=True)
2222
1396
def Secret_dbus_property(self, value):
2223
self.secret = bytes(value)
1397
self.secret = str(value)
2229
def __init__(self, child_pipe, key_id, fpr, address):
1402
class ProxyClient(object):
1403
def __init__(self, child_pipe, fpr, address):
2230
1404
self._pipe = child_pipe
2231
self._pipe.send(('init', key_id, fpr, address))
1405
self._pipe.send(('init', fpr, address))
2232
1406
if not self._pipe.recv():
2233
raise KeyError(key_id or fpr)
2235
1409
def __getattribute__(self, name):
1410
if(name == '_pipe'):
2237
1411
return super(ProxyClient, self).__getattribute__(name)
2238
1412
self._pipe.send(('getattr', name))
2239
1413
data = self._pipe.recv()
2240
1414
if data[0] == 'data':
2242
1416
if data[0] == 'function':
2244
1417
def func(*args, **kwargs):
2245
1418
self._pipe.send(('funcall', name, args, kwargs))
2246
1419
return self._pipe.recv()[1]
2250
1422
def __setattr__(self, name, value):
1423
if(name == '_pipe'):
2252
1424
return super(ProxyClient, self).__setattr__(name, value)
2253
1425
self._pipe.send(('setattr', name, value))
1428
class ClientDBusTransitional(ClientDBus):
1429
__metaclass__ = AlternateDBusNamesMetaclass
2256
1432
class ClientHandler(socketserver.BaseRequestHandler, object):
2257
1433
"""A class to handle client connections.
2259
1435
Instantiated once for each connection to handle it.
2260
1436
Note: This will run in its own forked process."""
2262
1438
def handle(self):
2263
1439
with contextlib.closing(self.server.child_pipe) as child_pipe:
2264
1440
logger.info("TCP connection from: %s",
2265
str(self.client_address))
1441
unicode(self.client_address))
2266
1442
logger.debug("Pipe FD: %d",
2267
1443
self.server.child_pipe.fileno())
2269
session = gnutls.ClientSession(self.request)
2271
# priority = ':'.join(("NONE", "+VERS-TLS1.1",
2272
# "+AES-256-CBC", "+SHA1",
2273
# "+COMP-NULL", "+CTYPE-OPENPGP",
1445
session = (gnutls.connection
1446
.ClientSession(self.request,
1448
.X509Credentials()))
1450
# Note: gnutls.connection.X509Credentials is really a
1451
# generic GnuTLS certificate credentials object so long as
1452
# no X.509 keys are added to it. Therefore, we can use it
1453
# here despite using OpenPGP certificates.
1455
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1456
# "+AES-256-CBC", "+SHA1",
1457
# "+COMP-NULL", "+CTYPE-OPENPGP",
2275
1459
# Use a fallback default, since this MUST be set.
2276
1460
priority = self.server.gnutls_priority
2277
1461
if priority is None:
2278
1462
priority = "NORMAL"
2279
gnutls.priority_set_direct(session._c_object,
2280
priority.encode("utf-8"),
1463
(gnutls.library.functions
1464
.gnutls_priority_set_direct(session._c_object,
2283
1467
# Start communication using the Mandos protocol
2284
1468
# Get protocol number
2285
1469
line = self.request.makefile().readline()
2286
1470
logger.debug("Protocol version: %r", line)
2288
1472
if int(line.strip().split()[0]) > 1:
2289
raise RuntimeError(line)
2290
1474
except (ValueError, IndexError, RuntimeError) as error:
2291
1475
logger.error("Unknown protocol version: %s", error)
2294
1478
# Start GnuTLS connection
2296
1480
session.handshake()
2297
except gnutls.Error as error:
1481
except gnutls.errors.GNUTLSError as error:
2298
1482
logger.warning("Handshake failed: %s", error)
2299
1483
# Do not run session.bye() here: the session is not
2300
1484
# established. Just abandon the request.
2302
1486
logger.debug("Handshake succeeded")
2304
1488
approval_required = False
2306
if gnutls.has_rawpk:
2309
key_id = self.key_id(
2310
self.peer_certificate(session))
2311
except (TypeError, gnutls.Error) as error:
2312
logger.warning("Bad certificate: %s", error)
2314
logger.debug("Key ID: %s", key_id)
2319
fpr = self.fingerprint(
2320
self.peer_certificate(session))
2321
except (TypeError, gnutls.Error) as error:
2322
logger.warning("Bad certificate: %s", error)
2324
logger.debug("Fingerprint: %s", fpr)
2327
client = ProxyClient(child_pipe, key_id, fpr,
1491
fpr = self.fingerprint(self.peer_certificate
1494
gnutls.errors.GNUTLSError) as error:
1495
logger.warning("Bad certificate: %s", error)
1497
logger.debug("Fingerprint: %s", fpr)
1498
if self.server.use_dbus:
1500
client.NewRequest(str(self.client_address))
1503
client = ProxyClient(child_pipe, fpr,
2328
1504
self.client_address)
2329
1505
except KeyError:
2332
1508
if client.approval_delay:
2333
1509
delay = client.approval_delay
2334
1510
client.approvals_pending += 1
2335
1511
approval_required = True
2338
1514
if not client.enabled:
2339
1515
logger.info("Client %s is disabled",
2341
1517
if self.server.use_dbus:
2342
1518
# Emit D-Bus signal
2343
1519
client.Rejected("Disabled")
2346
if client.approved or not client.approval_delay:
2347
# We are approved or approval is disabled
1522
if client._approved or not client.approval_delay:
1523
#We are approved or approval is disabled
2349
elif client.approved is None:
1525
elif client._approved is None:
2350
1526
logger.info("Client %s needs approval",
2352
1528
if self.server.use_dbus:
2353
1529
# Emit D-Bus signal
2354
1530
client.NeedApproval(
2355
client.approval_delay.total_seconds()
2356
* 1000, client.approved_by_default)
1531
client.approval_delay_milliseconds(),
1532
client.approved_by_default)
2358
1534
logger.warning("Client %s was not approved",
3071
2039
use_ipv6 = server_settings["use_ipv6"]
3072
2040
stored_state_path = os.path.join(server_settings["statedir"],
3073
2041
stored_state_file)
3074
foreground = server_settings["foreground"]
3075
zeroconf = server_settings["zeroconf"]
3078
initlogger(debug, logging.DEBUG)
2044
initlogger(logging.DEBUG)
3080
2046
if not debuglevel:
3083
2049
level = getattr(logging, debuglevel.upper())
3084
initlogger(debug, level)
3086
2052
if server_settings["servicename"] != "Mandos":
3087
syslogger.setFormatter(
3088
logging.Formatter('Mandos ({}) [%(process)d]:'
3089
' %(levelname)s: %(message)s'.format(
3090
server_settings["servicename"])))
2053
syslogger.setFormatter(logging.Formatter
2054
('Mandos (%s) [%%(process)d]:'
2055
' %%(levelname)s: %%(message)s'
2056
% server_settings["servicename"]))
3092
2058
# Parse config file with clients
3093
client_config = configparser.ConfigParser(Client.client_defaults)
2059
client_defaults = { "timeout": "5m",
2060
"extended_timeout": "15m",
2062
"checker": "fping -q -- %%(host)s",
2064
"approval_delay": "0s",
2065
"approval_duration": "1s",
2067
client_config = configparser.SafeConfigParser(client_defaults)
3094
2068
client_config.read(os.path.join(server_settings["configdir"],
3095
2069
"clients.conf"))
3097
2071
global mandos_dbus_service
3098
2072
mandos_dbus_service = None
3101
if server_settings["socket"] != "":
3102
socketfd = server_settings["socket"]
3103
tcp_server = MandosServer(
3104
(server_settings["address"], server_settings["port"]),
3106
interface=(server_settings["interface"] or None),
3108
gnutls_priority=server_settings["priority"],
3112
pidfilename = "/run/mandos.pid"
3113
if not os.path.isdir("/run/."):
3114
pidfilename = "/var/run/mandos.pid"
3117
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
3118
except IOError as e:
3119
logger.error("Could not open file %r", pidfilename,
3122
for name, group in (("_mandos", "_mandos"),
3123
("mandos", "mandos"),
3124
("nobody", "nogroup")):
3126
uid = pwd.getpwnam(name).pw_uid
3127
gid = pwd.getpwnam(group).pw_gid
2074
tcp_server = MandosServer((server_settings["address"],
2075
server_settings["port"]),
2077
interface=(server_settings["interface"]
2081
server_settings["priority"],
2084
pidfilename = "/var/run/mandos.pid"
2086
pidfile = open(pidfilename, "w")
2088
logger.error("Could not open file %r", pidfilename)
2091
uid = pwd.getpwnam("_mandos").pw_uid
2092
gid = pwd.getpwnam("_mandos").pw_gid
2095
uid = pwd.getpwnam("mandos").pw_uid
2096
gid = pwd.getpwnam("mandos").pw_gid
3129
2097
except KeyError:
2099
uid = pwd.getpwnam("nobody").pw_uid
2100
gid = pwd.getpwnam("nobody").pw_gid
3138
logger.debug("Did setuid/setgid to {}:{}".format(uid,
3140
2107
except OSError as error:
3141
logger.warning("Failed to setuid/setgid to {}:{}: {}"
3142
.format(uid, gid, os.strerror(error.errno)))
3143
if error.errno != errno.EPERM:
2108
if error[0] != errno.EPERM:
3147
2112
# Enable all possible GnuTLS debugging
3149
2114
# "Use a log level over 10 to enable all debugging options."
3150
2115
# - GnuTLS manual
3151
gnutls.global_set_log_level(11)
2116
gnutls.library.functions.gnutls_global_set_log_level(11)
2118
@gnutls.library.types.gnutls_log_func
3154
2119
def debug_gnutls(level, string):
3155
2120
logger.debug("GnuTLS: %s", string[:-1])
3157
gnutls.global_set_log_function(debug_gnutls)
2122
(gnutls.library.functions
2123
.gnutls_global_set_log_function(debug_gnutls))
3159
2125
# Redirect stdin so all checkers get /dev/null
3160
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2126
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
3161
2127
os.dup2(null, sys.stdin.fileno())
2131
# No console logging
2132
logger.removeHandler(console)
3165
2134
# Need to fork before connecting to D-Bus
3167
2136
# Close all input and output, do double fork, etc.
3170
if gi.version_info < (3, 10, 2):
3171
# multiprocessing will use threads, so before we use GLib we
3172
# need to inform GLib that threads will be used.
3175
2139
global main_loop
3176
2140
# From the Avahi example code
3177
DBusGMainLoop(set_as_default=True)
3178
main_loop = GLib.MainLoop()
2141
DBusGMainLoop(set_as_default=True )
2142
main_loop = gobject.MainLoop()
3179
2143
bus = dbus.SystemBus()
3180
2144
# End of Avahi example code
3183
2147
bus_name = dbus.service.BusName("se.recompile.Mandos",
3186
old_bus_name = dbus.service.BusName(
3187
"se.bsnet.fukt.Mandos", bus,
3189
except dbus.exceptions.DBusException as e:
3190
logger.error("Disabling D-Bus:", exc_info=e)
2148
bus, do_not_queue=True)
2149
old_bus_name = (dbus.service.BusName
2150
("se.bsnet.fukt.Mandos", bus,
2152
except dbus.exceptions.NameExistsException as e:
2153
logger.error(unicode(e) + ", disabling D-Bus")
3191
2154
use_dbus = False
3192
2155
server_settings["use_dbus"] = False
3193
2156
tcp_server.use_dbus = False
3195
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3196
service = AvahiServiceToSyslog(
3197
name=server_settings["servicename"],
3198
servicetype="_mandos._tcp",
3201
if server_settings["interface"]:
3202
service.interface = if_nametoindex(
3203
server_settings["interface"].encode("utf-8"))
2157
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2158
service = AvahiServiceToSyslog(name =
2159
server_settings["servicename"],
2160
servicetype = "_mandos._tcp",
2161
protocol = protocol, bus = bus)
2162
if server_settings["interface"]:
2163
service.interface = (if_nametoindex
2164
(str(server_settings["interface"])))
3205
2166
global multiprocessing_manager
3206
2167
multiprocessing_manager = multiprocessing.Manager()
3208
2169
client_class = Client
3210
client_class = functools.partial(ClientDBus, bus=bus)
3212
client_settings = Client.config_parser(client_config)
2171
client_class = functools.partial(ClientDBusTransitional,
2174
special_settings = {
2175
# Some settings need to be accessd by special methods;
2176
# booleans need .getboolean(), etc. Here is a list of them:
2177
"approved_by_default":
2179
client_config.getboolean(section, "approved_by_default"),
2181
# Construct a new dict of client settings of this form:
2182
# { client_name: {setting_name: value, ...}, ...}
2183
# with exceptions for any special settings as defined above
2184
client_settings = dict((clientname,
2187
if setting not in special_settings
2188
else special_settings[setting]
2190
for setting, value in
2191
client_config.items(clientname)))
2192
for clientname in client_config.sections())
3213
2194
old_client_settings = {}
3216
# This is used to redirect stdout and stderr for checker processes
3218
wnull = open(os.devnull, "w") # A writable /dev/null
3219
# Only used if server is running in foreground but not in debug
3221
if debug or not foreground:
3224
2197
# Get client data and settings from last running state.
3225
2198
if server_settings["restore"]:
3227
2200
with open(stored_state_path, "rb") as stored_state:
3228
if sys.version_info.major == 2:
3229
clients_data, old_client_settings = pickle.load(
3232
bytes_clients_data, bytes_old_client_settings = (
3233
pickle.load(stored_state, encoding="bytes"))
3234
# Fix bytes to strings
3237
clients_data = {(key.decode("utf-8")
3238
if isinstance(key, bytes)
3241
bytes_clients_data.items()}
3242
del bytes_clients_data
3243
for key in clients_data:
3244
value = {(k.decode("utf-8")
3245
if isinstance(k, bytes) else k): v
3247
clients_data[key].items()}
3248
clients_data[key] = value
3250
value["client_structure"] = [
3252
if isinstance(s, bytes)
3254
value["client_structure"]]
3255
# .name, .host, and .checker_command
3256
for k in ("name", "host", "checker_command"):
3257
if isinstance(value[k], bytes):
3258
value[k] = value[k].decode("utf-8")
3259
if "key_id" not in value:
3260
value["key_id"] = ""
3261
elif "fingerprint" not in value:
3262
value["fingerprint"] = ""
3263
# old_client_settings
3265
old_client_settings = {
3266
(key.decode("utf-8")
3267
if isinstance(key, bytes)
3270
bytes_old_client_settings.items()}
3271
del bytes_old_client_settings
3272
# .host and .checker_command
3273
for value in old_client_settings.values():
3274
for attribute in ("host", "checker_command"):
3275
if isinstance(value[attribute], bytes):
3276
value[attribute] = (value[attribute]
2201
clients_data, old_client_settings = (pickle.load
3278
2203
os.remove(stored_state_path)
3279
2204
except IOError as e:
3280
if e.errno == errno.ENOENT:
3281
logger.warning("Could not load persistent state:"
3282
" {}".format(os.strerror(e.errno)))
3284
logger.critical("Could not load persistent state:",
2205
logger.warning("Could not load persistent state: {0}"
2207
if e.errno != errno.ENOENT:
3287
except EOFError as e:
3288
logger.warning("Could not load persistent state: "
3292
with PGPEngine() as pgp:
3293
for client_name, client in clients_data.items():
3294
# Skip removed clients
3295
if client_name not in client_settings:
2210
with Crypto() as crypt:
2211
for client in clients_data:
2212
client_name = client["name"]
3298
2214
# Decide which value to use after restoring saved state.
3299
2215
# We have three different values: Old config file,
3300
2216
# new config file, and saved state.
3305
2221
# For each value in new config, check if it
3306
2222
# differs from the old config value (Except for
3307
2223
# the "secret" attribute)
3308
if (name != "secret"
3310
old_client_settings[client_name][name])):
3311
client[name] = value
2224
if (name != "secret" and
2225
value != old_client_settings[client_name]
2227
setattr(client, name, value)
3312
2228
except KeyError:
3315
2231
# Clients who has passed its expire date can still be
3316
# enabled if its last checker was successful. A Client
3317
# whose checker succeeded before we stored its state is
3318
# assumed to have successfully run all checkers during
3320
if client["enabled"]:
3321
if datetime.datetime.utcnow() >= client["expires"]:
3322
if not client["last_checked_ok"]:
3324
"disabling client {} - Client never "
3325
"performed a successful checker".format(
3327
client["enabled"] = False
3328
elif client["last_checker_status"] != 0:
3330
"disabling client {} - Client last"
3331
" checker failed with error code"
3334
client["last_checker_status"]))
2232
# enabled if its last checker was sucessful. Clients
2233
# whose checker failed before we stored its state is
2234
# assumed to have failed all checkers during downtime.
2235
if client["enabled"] and client["last_checked_ok"]:
2236
if ((datetime.datetime.utcnow()
2237
- client["last_checked_ok"])
2238
> client["interval"]):
2239
if client["last_checker_status"] != 0:
3335
2240
client["enabled"] = False
3337
client["expires"] = (
3338
datetime.datetime.utcnow()
3339
+ client["timeout"])
3340
logger.debug("Last checker succeeded,"
3341
" keeping {} enabled".format(
2242
client["expires"] = (datetime.datetime
2244
+ client["timeout"])
2246
client["changedstate"] = (multiprocessing_manager
2248
(multiprocessing_manager
2251
new_client = (ClientDBusTransitional.__new__
2252
(ClientDBusTransitional))
2253
tcp_server.clients[client_name] = new_client
2254
new_client.bus = bus
2255
for name, value in client.iteritems():
2256
setattr(new_client, name, value)
2257
client_object_name = unicode(client_name).translate(
2258
{ord("."): ord("_"),
2259
ord("-"): ord("_")})
2260
new_client.dbus_object_path = (dbus.ObjectPath
2262
+ client_object_name))
2263
DBusObjectWithProperties.__init__(new_client,
2268
tcp_server.clients[client_name] = (Client.__new__
2270
for name, value in client.iteritems():
2271
setattr(tcp_server.clients[client_name],
3344
client["secret"] = pgp.decrypt(
3345
client["encrypted_secret"],
2275
tcp_server.clients[client_name].secret = (
2276
crypt.decrypt(tcp_server.clients[client_name]
2278
client_settings[client_name]
2281
# If decryption fails, we use secret from new settings
2282
tcp_server.clients[client_name].secret = (
3346
2283
client_settings[client_name]["secret"])
3348
# If decryption fails, we use secret from new settings
3349
logger.debug("Failed to decrypt {} old secret".format(
3351
client["secret"] = (client_settings[client_name]
3354
# Add/remove clients based on new changes made to config
3355
for client_name in (set(old_client_settings)
3356
- set(client_settings)):
3357
del clients_data[client_name]
3358
for client_name in (set(client_settings)
3359
- set(old_client_settings)):
3360
clients_data[client_name] = client_settings[client_name]
3362
# Create all client objects
3363
for client_name, client in clients_data.items():
3364
tcp_server.clients[client_name] = client_class(
3367
server_settings=server_settings)
2285
# Create/remove clients based on new changes made to config
2286
for clientname in set(old_client_settings) - set(client_settings):
2287
del tcp_server.clients[clientname]
2288
for clientname in set(client_settings) - set(old_client_settings):
2289
tcp_server.clients[clientname] = (client_class(name
3369
2295
if not tcp_server.clients:
3370
2296
logger.warning("No clients defined")
3373
if pidfile is not None:
3377
print(pid, file=pidfile)
3379
logger.error("Could not write to file %r with PID %d",
2302
pidfile.write(str(pid) + "\n".encode("utf-8"))
2305
logger.error("Could not write to file %r with PID %d",
2308
# "pidfile" was never created
3382
2310
del pidfilename
3384
for termsig in (signal.SIGHUP, signal.SIGTERM):
3385
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3386
lambda: main_loop.quit() and False)
2312
signal.signal(signal.SIGINT, signal.SIG_IGN)
2314
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2315
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
3390
@alternate_dbus_interfaces(
3391
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3392
class MandosDBusService(DBusObjectWithObjectManager):
2318
class MandosDBusService(dbus.service.Object):
3393
2319
"""A D-Bus proxy object"""
3395
2320
def __init__(self):
3396
2321
dbus.service.Object.__init__(self, bus, "/")
3398
2322
_interface = "se.recompile.Mandos"
3400
2324
@dbus.service.signal(_interface, signature="o")
3401
2325
def ClientAdded(self, objpath):
3405
2329
@dbus.service.signal(_interface, signature="ss")
3406
def ClientNotFound(self, key_id, address):
2330
def ClientNotFound(self, fingerprint, address):
3410
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3412
2334
@dbus.service.signal(_interface, signature="os")
3413
2335
def ClientRemoved(self, objpath, name):
3417
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3419
2339
@dbus.service.method(_interface, out_signature="ao")
3420
2340
def GetAllClients(self):
3422
return dbus.Array(c.dbus_object_path for c in
3423
tcp_server.clients.values())
3425
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
2342
return dbus.Array(c.dbus_object_path
2344
tcp_server.clients.itervalues())
3427
2346
@dbus.service.method(_interface,
3428
2347
out_signature="a{oa{sv}}")
3429
2348
def GetAllClientsWithProperties(self):
3431
2350
return dbus.Dictionary(
3432
{c.dbus_object_path: c.GetAll(
3433
"se.recompile.Mandos.Client")
3434
for c in tcp_server.clients.values()},
2351
((c.dbus_object_path, c.GetAll(""))
2352
for c in tcp_server.clients.itervalues()),
3435
2353
signature="oa{sv}")
3437
2355
@dbus.service.method(_interface, in_signature="o")
3438
2356
def RemoveClient(self, object_path):
3440
for c in tcp_server.clients.values():
2358
for c in tcp_server.clients.itervalues():
3441
2359
if c.dbus_object_path == object_path:
3442
2360
del tcp_server.clients[c.name]
3443
2361
c.remove_from_connection()
3444
# Don't signal the disabling
2362
# Don't signal anything except ClientRemoved
3445
2363
c.disable(quiet=True)
3446
# Emit D-Bus signal for removal
3447
self.client_removed_signal(c)
2365
self.ClientRemoved(object_path, c.name)
3449
2367
raise KeyError(object_path)
3453
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3454
out_signature="a{oa{sa{sv}}}")
3455
def GetManagedObjects(self):
3457
return dbus.Dictionary(
3458
{client.dbus_object_path:
3460
{interface: client.GetAll(interface)
3462
client._get_all_interface_names()})
3463
for client in tcp_server.clients.values()})
3465
def client_added_signal(self, client):
3466
"""Send the new standard signal and the old signal"""
3468
# New standard signal
3469
self.InterfacesAdded(
3470
client.dbus_object_path,
3472
{interface: client.GetAll(interface)
3474
client._get_all_interface_names()}))
3476
self.ClientAdded(client.dbus_object_path)
3478
def client_removed_signal(self, client):
3479
"""Send the new standard signal and the old signal"""
3481
# New standard signal
3482
self.InterfacesRemoved(
3483
client.dbus_object_path,
3484
client._get_all_interface_names())
3486
self.ClientRemoved(client.dbus_object_path,
3489
mandos_dbus_service = MandosDBusService()
3491
# Save modules to variables to exempt the modules from being
3492
# unloaded before the function registered with atexit() is run.
3493
mp = multiprocessing
2371
class MandosDBusServiceTransitional(MandosDBusService):
2372
__metaclass__ = AlternateDBusNamesMetaclass
2373
mandos_dbus_service = MandosDBusServiceTransitional()
3497
2376
"Cleanup function; run on exit"
3501
mp.active_children()
2379
multiprocessing.active_children()
3503
2380
if not (tcp_server.clients or client_settings):
3506
2383
# Store client before exiting. Secrets are encrypted with key
3507
2384
# based on what config file has. If config file is
3508
2385
# removed/edited, old secret will thus be unrecovable.
3510
with PGPEngine() as pgp:
3511
for client in tcp_server.clients.values():
2387
with Crypto() as crypt:
2388
for client in tcp_server.clients.itervalues():
3512
2389
key = client_settings[client.name]["secret"]
3513
client.encrypted_secret = pgp.encrypt(client.secret,
2390
client.encrypted_secret = crypt.encrypt(client.secret,
3515
2392
client_dict = {}
3517
# A list of attributes that can not be pickled
3519
exclude = {"bus", "changedstate", "secret",
3520
"checker", "server_settings"}
3521
for name, typ in inspect.getmembers(dbus.service
2394
# A list of attributes that will not be stored when
2396
exclude = set(("bus", "changedstate", "secret"))
2397
for name, typ in (inspect.getmembers
2398
(dbus.service.Object)):
3523
2399
exclude.add(name)
3525
2401
client_dict["encrypted_secret"] = (client
3526
2402
.encrypted_secret)
3527
2403
for attr in client.client_structure:
3528
2404
if attr not in exclude:
3529
2405
client_dict[attr] = getattr(client, attr)
3531
clients[client.name] = client_dict
2407
clients.append(client_dict)
3532
2408
del client_settings[client.name]["secret"]
3535
with tempfile.NamedTemporaryFile(
3539
dir=os.path.dirname(stored_state_path),
3540
delete=False) as stored_state:
3541
pickle.dump((clients, client_settings), stored_state,
3543
tempname = stored_state.name
3544
os.rename(tempname, stored_state_path)
2411
with os.fdopen(os.open(stored_state_path,
2412
os.O_CREAT|os.O_WRONLY|os.O_TRUNC,
2413
0600), "wb") as stored_state:
2414
pickle.dump((clients, client_settings), stored_state)
3545
2415
except (IOError, OSError) as e:
3551
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
3552
logger.warning("Could not save persistent state: {}"
3553
.format(os.strerror(e.errno)))
3555
logger.warning("Could not save persistent state:",
2416
logger.warning("Could not save persistent state: {0}"
2418
if e.errno not in (errno.ENOENT, errno.EACCES):
3559
2421
# Delete all clients, and settings from config
3560
2422
while tcp_server.clients:
3561
2423
name, client = tcp_server.clients.popitem()
3563
2425
client.remove_from_connection()
3564
# Don't signal the disabling
2426
# Don't signal anything except ClientRemoved
3565
2427
client.disable(quiet=True)
3566
# Emit D-Bus signal for removal
3568
mandos_dbus_service.client_removed_signal(client)
2430
mandos_dbus_service.ClientRemoved(client
3569
2433
client_settings.clear()
3571
2435
atexit.register(cleanup)
3573
for client in tcp_server.clients.values():
2437
for client in tcp_server.clients.itervalues():
3575
# Emit D-Bus signal for adding
3576
mandos_dbus_service.client_added_signal(client)
2440
mandos_dbus_service.ClientAdded(client.dbus_object_path)
3577
2441
# Need to initiate checking of clients
3578
2442
if client.enabled:
3579
2443
client.init_checker()
3581
2445
tcp_server.enable()
3582
2446
tcp_server.server_activate()
3584
2448
# Find out what port we got
3586
service.port = tcp_server.socket.getsockname()[1]
2449
service.port = tcp_server.socket.getsockname()[1]
3588
2451
logger.info("Now listening on address %r, port %d,"
3589
" flowinfo %d, scope_id %d",
3590
*tcp_server.socket.getsockname())
2452
" flowinfo %d, scope_id %d"
2453
% tcp_server.socket.getsockname())
3592
logger.info("Now listening on address %r, port %d",
3593
*tcp_server.socket.getsockname())
3595
# service.interface = tcp_server.socket.getsockname()[3]
2455
logger.info("Now listening on address %r, port %d"
2456
% tcp_server.socket.getsockname())
2458
#service.interface = tcp_server.socket.getsockname()[3]
3599
# From the Avahi example code
3602
except dbus.exceptions.DBusException as error:
3603
logger.critical("D-Bus Exception", exc_info=error)
3606
# End of Avahi example code
3609
GLib.IOChannel.unix_new(tcp_server.fileno()),
3610
GLib.PRIORITY_DEFAULT, GLib.IO_IN,
3611
lambda *args, **kwargs: (tcp_server.handle_request
3612
(*args[2:], **kwargs) or True))
2461
# From the Avahi example code
2464
except dbus.exceptions.DBusException as error:
2465
logger.critical("DBusException: %s", error)
2468
# End of Avahi example code
2470
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2471
lambda *args, **kwargs:
2472
(tcp_server.handle_request
2473
(*args[2:], **kwargs) or True))
3614
2475
logger.debug("Starting main loop")
3615
2476
main_loop.run()
3616
2477
except AvahiError as error:
3617
logger.critical("Avahi Error", exc_info=error)
2478
logger.critical("AvahiError: %s", error)
3620
2481
except KeyboardInterrupt: