517
364
follow_name_owner_changes=True),
518
365
avahi.DBUS_INTERFACE_SERVER)
519
366
self.server.connect_to_signal("StateChanged",
520
self.server_state_changed)
367
self.server_state_changed)
521
368
self.server_state_changed(self.server.GetState())
524
370
class AvahiServiceToSyslog(AvahiService):
525
def rename(self, *args, **kwargs):
526
372
"""Add the new name to the syslog messages"""
527
ret = super(AvahiServiceToSyslog, self).rename(*args, **kwargs)
528
syslogger.setFormatter(logging.Formatter(
529
'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'
534
# Pretend that we have a GnuTLS module
536
"""This isn't so much a class as it is a module-like namespace."""
538
library = ctypes.util.find_library("gnutls")
540
library = ctypes.util.find_library("gnutls-deb0")
541
_library = ctypes.cdll.LoadLibrary(library)
544
# Unless otherwise indicated, the constants and types below are
545
# all from the gnutls/gnutls.h C header file.
556
E_NO_CERTIFICATE_FOUND = -49
561
KEYID_USE_SHA256 = 1 # gnutls/x509.h
562
OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
565
class session_int(ctypes.Structure):
567
session_t = ctypes.POINTER(session_int)
569
class certificate_credentials_st(ctypes.Structure):
571
certificate_credentials_t = ctypes.POINTER(
572
certificate_credentials_st)
573
certificate_type_t = ctypes.c_int
575
class datum_t(ctypes.Structure):
576
_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
577
('size', ctypes.c_uint)]
579
class openpgp_crt_int(ctypes.Structure):
581
openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
582
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
583
log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
584
credentials_type_t = ctypes.c_int
585
transport_ptr_t = ctypes.c_void_p
586
close_request_t = ctypes.c_int
589
class Error(Exception):
590
def __init__(self, message=None, code=None, args=()):
591
# Default usage is by a message string, but if a return
592
# code is passed, convert it to a string with
595
if message is None and code is not None:
596
message = gnutls.strerror(code)
597
return super(gnutls.Error, self).__init__(
600
class CertificateSecurityError(Error):
606
self._c_object = gnutls.certificate_credentials_t()
607
gnutls.certificate_allocate_credentials(
608
ctypes.byref(self._c_object))
609
self.type = gnutls.CRD_CERTIFICATE
612
gnutls.certificate_free_credentials(self._c_object)
615
def __init__(self, socket, credentials=None):
616
self._c_object = gnutls.session_t()
617
gnutls_flags = gnutls.CLIENT
618
if gnutls.check_version(b"3.5.6"):
619
gnutls_flags |= gnutls.NO_TICKETS
621
gnutls_flags |= gnutls.ENABLE_RAWPK
622
gnutls.init(ctypes.byref(self._c_object), gnutls_flags)
624
gnutls.set_default_priority(self._c_object)
625
gnutls.transport_set_ptr(self._c_object, socket.fileno())
626
gnutls.handshake_set_private_extensions(self._c_object,
629
if credentials is None:
630
credentials = gnutls.Credentials()
631
gnutls.credentials_set(self._c_object, credentials.type,
632
ctypes.cast(credentials._c_object,
634
self.credentials = credentials
637
gnutls.deinit(self._c_object)
640
return gnutls.handshake(self._c_object)
642
def send(self, data):
646
data_len -= gnutls.record_send(self._c_object,
651
return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
653
# Error handling functions
654
def _error_code(result):
655
"""A function to raise exceptions on errors, suitable
656
for the 'restype' attribute on ctypes functions"""
659
if result == gnutls.E_NO_CERTIFICATE_FOUND:
660
raise gnutls.CertificateSecurityError(code=result)
661
raise gnutls.Error(code=result)
663
def _retry_on_error(result, func, arguments):
664
"""A function to retry on some errors, suitable
665
for the 'errcheck' attribute on ctypes functions"""
667
if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
668
return _error_code(result)
669
result = func(*arguments)
672
# Unless otherwise indicated, the function declarations below are
673
# all from the gnutls/gnutls.h C header file.
676
priority_set_direct = _library.gnutls_priority_set_direct
677
priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
678
ctypes.POINTER(ctypes.c_char_p)]
679
priority_set_direct.restype = _error_code
681
init = _library.gnutls_init
682
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
683
init.restype = _error_code
685
set_default_priority = _library.gnutls_set_default_priority
686
set_default_priority.argtypes = [session_t]
687
set_default_priority.restype = _error_code
689
record_send = _library.gnutls_record_send
690
record_send.argtypes = [session_t, ctypes.c_void_p,
692
record_send.restype = ctypes.c_ssize_t
693
record_send.errcheck = _retry_on_error
695
certificate_allocate_credentials = (
696
_library.gnutls_certificate_allocate_credentials)
697
certificate_allocate_credentials.argtypes = [
698
ctypes.POINTER(certificate_credentials_t)]
699
certificate_allocate_credentials.restype = _error_code
701
certificate_free_credentials = (
702
_library.gnutls_certificate_free_credentials)
703
certificate_free_credentials.argtypes = [
704
certificate_credentials_t]
705
certificate_free_credentials.restype = None
707
handshake_set_private_extensions = (
708
_library.gnutls_handshake_set_private_extensions)
709
handshake_set_private_extensions.argtypes = [session_t,
711
handshake_set_private_extensions.restype = None
713
credentials_set = _library.gnutls_credentials_set
714
credentials_set.argtypes = [session_t, credentials_type_t,
716
credentials_set.restype = _error_code
718
strerror = _library.gnutls_strerror
719
strerror.argtypes = [ctypes.c_int]
720
strerror.restype = ctypes.c_char_p
722
certificate_type_get = _library.gnutls_certificate_type_get
723
certificate_type_get.argtypes = [session_t]
724
certificate_type_get.restype = _error_code
726
certificate_get_peers = _library.gnutls_certificate_get_peers
727
certificate_get_peers.argtypes = [session_t,
728
ctypes.POINTER(ctypes.c_uint)]
729
certificate_get_peers.restype = ctypes.POINTER(datum_t)
731
global_set_log_level = _library.gnutls_global_set_log_level
732
global_set_log_level.argtypes = [ctypes.c_int]
733
global_set_log_level.restype = None
735
global_set_log_function = _library.gnutls_global_set_log_function
736
global_set_log_function.argtypes = [log_func]
737
global_set_log_function.restype = None
739
deinit = _library.gnutls_deinit
740
deinit.argtypes = [session_t]
741
deinit.restype = None
743
handshake = _library.gnutls_handshake
744
handshake.argtypes = [session_t]
745
handshake.restype = _error_code
746
handshake.errcheck = _retry_on_error
748
transport_set_ptr = _library.gnutls_transport_set_ptr
749
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
750
transport_set_ptr.restype = None
752
bye = _library.gnutls_bye
753
bye.argtypes = [session_t, close_request_t]
754
bye.restype = _error_code
755
bye.errcheck = _retry_on_error
757
check_version = _library.gnutls_check_version
758
check_version.argtypes = [ctypes.c_char_p]
759
check_version.restype = ctypes.c_char_p
761
_need_version = b"3.3.0"
762
if check_version(_need_version) is None:
763
raise self.Error("Needs GnuTLS {} or later"
764
.format(_need_version))
766
_tls_rawpk_version = b"3.6.6"
767
has_rawpk = bool(check_version(_tls_rawpk_version))
771
class pubkey_st(ctypes.Structure):
773
pubkey_t = ctypes.POINTER(pubkey_st)
775
x509_crt_fmt_t = ctypes.c_int
777
# All the function declarations below are from gnutls/abstract.h
778
pubkey_init = _library.gnutls_pubkey_init
779
pubkey_init.argtypes = [ctypes.POINTER(pubkey_t)]
780
pubkey_init.restype = _error_code
782
pubkey_import = _library.gnutls_pubkey_import
783
pubkey_import.argtypes = [pubkey_t, ctypes.POINTER(datum_t),
785
pubkey_import.restype = _error_code
787
pubkey_get_key_id = _library.gnutls_pubkey_get_key_id
788
pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,
789
ctypes.POINTER(ctypes.c_ubyte),
790
ctypes.POINTER(ctypes.c_size_t)]
791
pubkey_get_key_id.restype = _error_code
793
pubkey_deinit = _library.gnutls_pubkey_deinit
794
pubkey_deinit.argtypes = [pubkey_t]
795
pubkey_deinit.restype = None
797
# All the function declarations below are from gnutls/openpgp.h
799
openpgp_crt_init = _library.gnutls_openpgp_crt_init
800
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
801
openpgp_crt_init.restype = _error_code
803
openpgp_crt_import = _library.gnutls_openpgp_crt_import
804
openpgp_crt_import.argtypes = [openpgp_crt_t,
805
ctypes.POINTER(datum_t),
807
openpgp_crt_import.restype = _error_code
809
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
810
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
811
ctypes.POINTER(ctypes.c_uint)]
812
openpgp_crt_verify_self.restype = _error_code
814
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
815
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
816
openpgp_crt_deinit.restype = None
818
openpgp_crt_get_fingerprint = (
819
_library.gnutls_openpgp_crt_get_fingerprint)
820
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
824
openpgp_crt_get_fingerprint.restype = _error_code
826
if check_version(b"3.6.4"):
827
certificate_type_get2 = _library.gnutls_certificate_type_get2
828
certificate_type_get2.argtypes = [session_t, ctypes.c_int]
829
certificate_type_get2.restype = _error_code
831
# Remove non-public functions
832
del _error_code, _retry_on_error
835
def call_pipe(connection, # : multiprocessing.Connection
836
func, *args, **kwargs):
837
"""This function is meant to be called by multiprocessing.Process
839
This function runs func(*args, **kwargs), and writes the resulting
840
return value on the provided multiprocessing.Connection.
842
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):
847
387
"""A representation of a client host served by this server.
850
approved: bool(); 'None' if not yet approved/disapproved
390
_approved: bool(); 'None' if not yet approved/disapproved
851
391
approval_delay: datetime.timedelta(); Time to wait for approval
852
392
approval_duration: datetime.timedelta(); Duration of one approval
853
checker: multiprocessing.Process(); a running checker process used
854
to see if the client lives. 'None' if no process is
856
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
857
397
checker_command: string; External command which is run to check
858
398
if client lives. %() expansions are done at
859
399
runtime with vars(self) as dict, so that for
860
400
instance %(name)s can be used in the command.
861
checker_initiator_tag: a GLib event source tag, or None
401
checker_initiator_tag: a gobject event source tag, or None
862
402
created: datetime.datetime(); (UTC) object creation
863
403
client_structure: Object describing what attributes a client has
864
404
and is used for storing the client at exit
865
405
current_checker_command: string; current running checker_command
866
disable_initiator_tag: a GLib event source tag, or None
406
disable_initiator_tag: a gobject event source tag, or None
868
408
fingerprint: string (40 or 32 hexadecimal digits); used to
869
uniquely identify an OpenPGP client
870
key_id: string (64 hexadecimal digits); used to uniquely identify
871
a client using raw public keys
409
uniquely identify the client
872
410
host: string; available for use by the checker command
873
411
interval: datetime.timedelta(); How often to start a new checker
874
412
last_approval_request: datetime.datetime(); (UTC) or None
875
413
last_checked_ok: datetime.datetime(); (UTC) or None
876
415
last_checker_status: integer between 0 and 255 reflecting exit
877
416
status of last checker. -1 reflects crashed
878
checker, -2 means no checker completed yet.
879
last_checker_signal: The signal which killed the last checker, if
880
last_checker_status is -1
881
last_enabled: datetime.datetime(); (UTC) or None
418
last_enabled: datetime.datetime(); (UTC)
882
419
name: string; from the config file, used in log messages and
883
420
D-Bus identifiers
884
421
secret: bytestring; sent verbatim (over TLS) to client
885
422
timeout: datetime.timedelta(); How long from last_checked_ok
886
423
until this client is disabled
887
extended_timeout: extra long timeout when secret has been sent
424
extended_timeout: extra long timeout when password has been sent
888
425
runtime_expansions: Allowed attributes for runtime expansion.
889
426
expires: datetime.datetime(); time (UTC) when a client will be
890
427
disabled, or None
891
server_settings: The server_settings dict from main()
894
430
runtime_expansions = ("approval_delay", "approval_duration",
895
"created", "enabled", "expires", "key_id",
896
"fingerprint", "host", "interval",
897
"last_approval_request", "last_checked_ok",
431
"created", "enabled", "fingerprint",
432
"host", "interval", "last_checked_ok",
898
433
"last_enabled", "name", "timeout")
901
"extended_timeout": "PT15M",
903
"checker": "fping -q -- %%(host)s",
905
"approval_delay": "PT0S",
906
"approval_duration": "PT1S",
907
"approved_by_default": "True",
912
def config_parser(config):
913
"""Construct a new dict of client settings of this form:
914
{ client_name: {setting_name: value, ...}, ...}
915
with exceptions for any special settings as defined above.
916
NOTE: Must be a pure function. Must return the same result
917
value given the same arguments.
920
for client_name in config.sections():
921
section = dict(config.items(client_name))
922
client = settings[client_name] = {}
924
client["host"] = section["host"]
925
# Reformat values from string types to Python types
926
client["approved_by_default"] = config.getboolean(
927
client_name, "approved_by_default")
928
client["enabled"] = config.getboolean(client_name,
931
# Uppercase and remove spaces from key_id and fingerprint
932
# for later comparison purposes with return value from the
933
# key_id() and fingerprint() functions
934
client["key_id"] = (section.get("key_id", "").upper()
936
client["fingerprint"] = (section["fingerprint"].upper()
938
if "secret" in section:
939
client["secret"] = codecs.decode(section["secret"]
942
elif "secfile" in section:
943
with open(os.path.expanduser(os.path.expandvars
944
(section["secfile"])),
946
client["secret"] = secfile.read()
948
raise TypeError("No secret or secfile for section {}"
950
client["timeout"] = string_to_delta(section["timeout"])
951
client["extended_timeout"] = string_to_delta(
952
section["extended_timeout"])
953
client["interval"] = string_to_delta(section["interval"])
954
client["approval_delay"] = string_to_delta(
955
section["approval_delay"])
956
client["approval_duration"] = string_to_delta(
957
section["approval_duration"])
958
client["checker_command"] = section["checker"]
959
client["last_approval_request"] = None
960
client["last_checked_ok"] = None
961
client["last_checker_status"] = -2
965
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'
967
if server_settings is None:
969
self.server_settings = server_settings
970
# adding all client settings
971
for setting, value in settings.items():
972
setattr(self, setting, value)
975
if not hasattr(self, "last_enabled"):
976
self.last_enabled = datetime.datetime.utcnow()
977
if not hasattr(self, "expires"):
978
self.expires = (datetime.datetime.utcnow()
981
self.last_enabled = None
984
457
logger.debug("Creating client %r", self.name)
985
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()
986
463
logger.debug(" Fingerprint: %s", self.fingerprint)
987
self.created = settings.get("created",
988
datetime.datetime.utcnow())
990
# 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"])
991
485
self.checker = None
992
486
self.checker_initiator_tag = None
993
487
self.disable_initiator_tag = None
488
self.expires = datetime.datetime.utcnow() + self.timeout
994
489
self.checker_callback_tag = None
490
self.checker_command = config["checker"]
995
491
self.current_checker_command = None
492
self._approved = None
493
self.approved_by_default = config.get("approved_by_default",
997
495
self.approvals_pending = 0
998
self.changedstate = multiprocessing_manager.Condition(
999
multiprocessing_manager.Lock())
1000
self.client_structure = [attr
1001
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()
1002
505
if not attr.startswith("_")]
1003
506
self.client_structure.append("client_structure")
1005
for name, t in inspect.getmembers(
1006
type(self), lambda obj: isinstance(obj, property)):
508
for name, t in inspect.getmembers(type(self),
1007
512
if not name.startswith("_"):
1008
513
self.client_structure.append(name)
1010
515
# Send notice to process children that client state has changed
1011
516
def send_changedstate(self):
1012
517
with self.changedstate:
1013
518
self.changedstate.notify_all()
1015
520
def enable(self):
1016
521
"""Start this client's checker and timeout hooks"""
1017
522
if getattr(self, "enabled", False):
1018
523
# Already enabled
525
self.send_changedstate()
1020
526
self.expires = datetime.datetime.utcnow() + self.timeout
1021
527
self.enabled = True
1022
528
self.last_enabled = datetime.datetime.utcnow()
1023
529
self.init_checker()
1024
self.send_changedstate()
1026
531
def disable(self, quiet=True):
1027
532
"""Disable this client."""
1028
533
if not getattr(self, "enabled", False):
536
self.send_changedstate()
1031
538
logger.info("Disabling client %s", self.name)
1032
if getattr(self, "disable_initiator_tag", None) is not None:
1033
GLib.source_remove(self.disable_initiator_tag)
539
if getattr(self, "disable_initiator_tag", False):
540
gobject.source_remove(self.disable_initiator_tag)
1034
541
self.disable_initiator_tag = None
1035
542
self.expires = None
1036
if getattr(self, "checker_initiator_tag", None) is not None:
1037
GLib.source_remove(self.checker_initiator_tag)
543
if getattr(self, "checker_initiator_tag", False):
544
gobject.source_remove(self.checker_initiator_tag)
1038
545
self.checker_initiator_tag = None
1039
546
self.stop_checker()
1040
547
self.enabled = False
1042
self.send_changedstate()
1043
# 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
1046
551
def __del__(self):
1049
554
def init_checker(self):
1050
555
# Schedule a new checker to be started an 'interval' from now,
1051
556
# and every interval from then on.
1052
if self.checker_initiator_tag is not None:
1053
GLib.source_remove(self.checker_initiator_tag)
1054
self.checker_initiator_tag = GLib.timeout_add(
1055
random.randrange(int(self.interval.total_seconds() * 1000
557
self.checker_initiator_tag = (gobject.timeout_add
558
(self.interval_milliseconds(),
1058
560
# Schedule a disable() when 'timeout' has passed
1059
if self.disable_initiator_tag is not None:
1060
GLib.source_remove(self.disable_initiator_tag)
1061
self.disable_initiator_tag = GLib.timeout_add(
1062
int(self.timeout.total_seconds() * 1000), self.disable)
561
self.disable_initiator_tag = (gobject.timeout_add
562
(self.timeout_milliseconds(),
1063
564
# Also start a new checker *right now*.
1064
565
self.start_checker()
1066
def checker_callback(self, source, condition, connection,
567
def checker_callback(self, pid, condition, command):
1068
568
"""The checker has completed, so take appropriate actions."""
1069
# Read return code from connection (see call_pipe)
1070
returncode = connection.recv()
1072
if self.checker is not None:
1074
569
self.checker_callback_tag = None
1075
570
self.checker = None
1078
self.last_checker_status = returncode
1079
self.last_checker_signal = None
571
if os.WIFEXITED(condition):
572
self.last_checker_status = os.WEXITSTATUS(condition)
1080
573
if self.last_checker_status == 0:
1081
574
logger.info("Checker for %(name)s succeeded",
1083
576
self.checked_ok()
1085
logger.info("Checker for %(name)s failed", vars(self))
578
logger.info("Checker for %(name)s failed",
1087
581
self.last_checker_status = -1
1088
self.last_checker_signal = -returncode
1089
582
logger.warning("Checker for %(name)s crashed?",
1093
def checked_ok(self):
1094
"""Assert that the client has been seen, alive and well."""
1095
self.last_checked_ok = datetime.datetime.utcnow()
1096
self.last_checker_status = 0
1097
self.last_checker_signal = None
1100
def bump_timeout(self, timeout=None):
1101
"""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,
1102
591
if timeout is None:
1103
592
timeout = self.timeout
593
self.last_checked_ok = datetime.datetime.utcnow()
1104
594
if self.disable_initiator_tag is not None:
1105
GLib.source_remove(self.disable_initiator_tag)
1106
self.disable_initiator_tag = None
595
gobject.source_remove(self.disable_initiator_tag)
1107
596
if getattr(self, "enabled", False):
1108
self.disable_initiator_tag = GLib.timeout_add(
1109
int(timeout.total_seconds() * 1000), self.disable)
597
self.disable_initiator_tag = (gobject.timeout_add
598
(_timedelta_to_milliseconds
599
(timeout), self.disable))
1110
600
self.expires = datetime.datetime.utcnow() + timeout
1112
602
def need_approval(self):
1113
603
self.last_approval_request = datetime.datetime.utcnow()
1115
605
def start_checker(self):
1116
606
"""Start a new checker subprocess if one is not running.
1118
608
If a checker already exists, leave it running and do
1120
610
# The reason for not killing a running checker is that if we
1121
# did that, and if a checker (for some reason) started running
1122
# slowly and taking more than 'interval' time, then the client
1123
# would inevitably timeout, since no checker would get a
1124
# 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
1125
615
# checkers alone, the checker would have to take more time
1126
616
# than 'timeout' for the client to be disabled, which is as it
1129
if self.checker is not None and not self.checker.is_alive():
1130
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)
1133
632
# Start a new checker if needed
1134
633
if self.checker is None:
1135
# Escape attributes for the shell
1137
attr: shlex.quote(str(getattr(self, attr)))
1138
for attr in self.runtime_expansions}
1140
command = self.checker_command % escaped_attrs
1141
except TypeError as error:
1142
logger.error('Could not format string "%s"',
1143
self.checker_command,
1145
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
1146
653
self.current_checker_command = command
1147
logger.info("Starting checker %r for %s", command,
1149
# We don't need to redirect stdout and stderr, since
1150
# in normal mode, that is already done by daemon(),
1151
# and in debug mode we don't want to. (Stdin is
1152
# always replaced by /dev/null.)
1153
# The exception is when not debugging but nevertheless
1154
# running in the foreground; use the previously
1156
popen_args = {"close_fds": True,
1159
if (not self.server_settings["debug"]
1160
and self.server_settings["foreground"]):
1161
popen_args.update({"stdout": wnull,
1163
pipe = multiprocessing.Pipe(duplex=False)
1164
self.checker = multiprocessing.Process(
1166
args=(pipe[1], subprocess.call, command),
1168
self.checker.start()
1169
self.checker_callback_tag = GLib.io_add_watch(
1170
GLib.IOChannel.unix_new(pipe[0].fileno()),
1171
GLib.PRIORITY_DEFAULT, GLib.IO_IN,
1172
self.checker_callback, pipe[0], command)
1173
# 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
1176
680
def stop_checker(self):
1177
681
"""Force the checker process, if any, to stop."""
1178
682
if self.checker_callback_tag:
1179
GLib.source_remove(self.checker_callback_tag)
683
gobject.source_remove(self.checker_callback_tag)
1180
684
self.checker_callback_tag = None
1181
685
if getattr(self, "checker", None) is None:
1183
687
logger.debug("Stopping checker for %(name)s", vars(self))
1184
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
1185
696
self.checker = None
1188
def dbus_service_property(dbus_interface,
699
def dbus_service_property(dbus_interface, signature="v",
700
access="readwrite", byte_arrays=False):
1192
701
"""Decorators for marking methods of a DBusObjectWithProperties to
1193
702
become properties on the D-Bus.
1195
704
The decorated method will be called with no arguments by "Get"
1196
705
and with one argument by "Set".
1198
707
The parameters, where they are supported, are the same as
1199
708
dbus.service.method, except there is only "signature", since the
1200
709
type from Get() and the type sent to Set() is the same.
1532
879
except (AttributeError, xml.dom.DOMException,
1533
880
xml.parsers.expat.ExpatError) as error:
1534
881
logger.error("Failed to override Introspection method",
1540
dbus.OBJECT_MANAGER_IFACE
1541
except AttributeError:
1542
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1545
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1546
"""A D-Bus object with an ObjectManager.
1548
Classes inheriting from this exposes the standard
1549
GetManagedObjects call and the InterfacesAdded and
1550
InterfacesRemoved signals on the standard
1551
"org.freedesktop.DBus.ObjectManager" interface.
1553
Note: No signals are sent automatically; they must be sent
1556
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1557
out_signature="a{oa{sa{sv}}}")
1558
def GetManagedObjects(self):
1559
"""This function must be overridden"""
1560
raise NotImplementedError()
1562
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1563
signature="oa{sa{sv}}")
1564
def InterfacesAdded(self, object_path, interfaces_and_properties):
1567
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1568
def InterfacesRemoved(self, object_path, interfaces):
1571
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1573
path_keyword='object_path',
1574
connection_keyword='connection')
1575
def Introspect(self, object_path, connection):
1576
"""Overloading of standard D-Bus method.
1578
Override return argument name of GetManagedObjects to be
1579
"objpath_interfaces_and_properties"
1581
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1585
document = xml.dom.minidom.parseString(xmlstring)
1587
for if_tag in document.getElementsByTagName("interface"):
1588
# Fix argument name for the GetManagedObjects method
1589
if (if_tag.getAttribute("name")
1590
== dbus.OBJECT_MANAGER_IFACE):
1591
for cn in if_tag.getElementsByTagName("method"):
1592
if (cn.getAttribute("name")
1593
== "GetManagedObjects"):
1594
for arg in cn.getElementsByTagName("arg"):
1595
if (arg.getAttribute("direction")
1599
"objpath_interfaces"
1601
xmlstring = document.toxml("utf-8")
1603
except (AttributeError, xml.dom.DOMException,
1604
xml.parsers.expat.ExpatError) as error:
1605
logger.error("Failed to override Introspection method",
1610
def datetime_to_dbus(dt, variant_level=0):
886
def datetime_to_dbus (dt, variant_level=0):
1611
887
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1613
return dbus.String("", variant_level=variant_level)
1614
return dbus.String(dt.isoformat(), variant_level=variant_level)
1617
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1618
"""A class decorator; applied to a subclass of
1619
dbus.service.Object, it will add alternate D-Bus attributes with
1620
interface names according to the "alt_interface_names" mapping.
1623
@alternate_dbus_interfaces({"org.example.Interface":
1624
"net.example.AlternateInterface"})
1625
class SampleDBusObject(dbus.service.Object):
1626
@dbus.service.method("org.example.Interface")
1627
def SampleDBusMethod():
1630
The above "SampleDBusMethod" on "SampleDBusObject" will be
1631
reachable via two interfaces: "org.example.Interface" and
1632
"net.example.AlternateInterface", the latter of which will have
1633
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1634
"true", unless "deprecate" is passed with a False value.
1636
This works for methods and signals, and also for D-Bus properties
1637
(from DBusObjectWithProperties) and interfaces (from the
1638
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.
1642
for orig_interface_name, alt_interface_name in (
1643
alt_interface_names.items()):
1645
interface_names = set()
1646
# Go though all attributes of the class
1647
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):
1648
906
# Ignore non-D-Bus attributes, and D-Bus attributes
1649
907
# with the wrong interface name
1650
908
if (not hasattr(attribute, "_dbus_interface")
1651
or not attribute._dbus_interface.startswith(
1652
orig_interface_name)):
909
or not attribute._dbus_interface
910
.startswith("se.recompile.Mandos")):
1654
912
# Create an alternate D-Bus interface name based on
1655
913
# the current name
1656
alt_interface = attribute._dbus_interface.replace(
1657
orig_interface_name, alt_interface_name)
1658
interface_names.add(alt_interface)
914
alt_interface = (attribute._dbus_interface
915
.replace("se.recompile.Mandos",
916
"se.bsnet.fukt.Mandos"))
1659
917
# Is this a D-Bus signal?
1660
918
if getattr(attribute, "_dbus_is_signal", False):
1661
# Extract the original non-method undecorated
1662
# function by black magic
1663
if sys.version_info.major == 2:
1664
nonmethod_func = (dict(
919
# Extract the original non-method function by
921
nonmethod_func = (dict(
1665
922
zip(attribute.func_code.co_freevars,
1666
attribute.__closure__))
1667
["func"].cell_contents)
1669
nonmethod_func = (dict(
1670
zip(attribute.__code__.co_freevars,
1671
attribute.__closure__))
1672
["func"].cell_contents)
923
attribute.__closure__))["func"]
1673
925
# Create a new, but exactly alike, function
1674
926
# object, and decorate it to be a new D-Bus signal
1675
927
# with the alternate D-Bus interface name
1676
new_function = copy_function(nonmethod_func)
1677
new_function = (dbus.service.signal(
1679
attribute._dbus_signature)(new_function))
1680
# Copy annotations, if any
1682
new_function._dbus_annotations = dict(
1683
attribute._dbus_annotations)
1684
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)))
1687
937
# Define a creator of a function to call both the
1688
# original and alternate functions, so both the
1689
# original and alternate signals gets sent when
1690
# the function is called
938
# old and new functions, so both the old and new
939
# signals gets sent when the function is called
1691
940
def fixscope(func1, func2):
1692
941
"""This function is a scope container to pass
1693
942
func1 and func2 to the "call_both" function
1694
943
outside of its arguments"""
1696
@functools.wraps(func2)
1697
944
def call_both(*args, **kwargs):
1698
945
"""This function will emit two D-Bus
1699
946
signals by calling func1 and func2"""
1700
947
func1(*args, **kwargs)
1701
948
func2(*args, **kwargs)
1702
# Make wrapper function look like a D-Bus
1704
for name, attr in inspect.getmembers(func2):
1705
if name.startswith("_dbus_"):
1706
setattr(call_both, name, attr)
1708
949
return call_both
1709
950
# Create the "call_both" function and add it to
1711
attr[attrname] = fixscope(attribute, new_function)
952
attr[attrname] = fixscope(attribute,
1712
954
# Is this a D-Bus method?
1713
955
elif getattr(attribute, "_dbus_is_method", False):
1714
956
# Create a new, but exactly alike, function
1715
957
# object. Decorate it to be a new D-Bus method
1716
958
# with the alternate D-Bus interface name. Add it
1719
dbus.service.method(
1721
attribute._dbus_in_signature,
1722
attribute._dbus_out_signature)
1723
(copy_function(attribute)))
1724
# Copy annotations, if any
1726
attr[attrname]._dbus_annotations = dict(
1727
attribute._dbus_annotations)
1728
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)))
1730
970
# Is this a D-Bus property?
1731
971
elif getattr(attribute, "_dbus_is_property", False):
1732
972
# Create a new, but exactly alike, function
1733
973
# object, and decorate it to be a new D-Bus
1734
974
# property with the alternate D-Bus interface
1735
975
# name. Add it to the class.
1736
attr[attrname] = (dbus_service_property(
1737
alt_interface, attribute._dbus_signature,
1738
attribute._dbus_access,
1739
attribute._dbus_get_args_options
1741
(copy_function(attribute)))
1742
# Copy annotations, if any
1744
attr[attrname]._dbus_annotations = dict(
1745
attribute._dbus_annotations)
1746
except AttributeError:
1748
# Is this a D-Bus interface?
1749
elif getattr(attribute, "_dbus_is_interface", False):
1750
# Create a new, but exactly alike, function
1751
# object. Decorate it to be a new D-Bus interface
1752
# with the alternate D-Bus interface name. Add it
1755
dbus_interface_annotations(alt_interface)
1756
(copy_function(attribute)))
1758
# Deprecate all alternate interfaces
1759
iname = "_AlternateDBusNames_interface_annotation{}"
1760
for interface_name in interface_names:
1762
@dbus_interface_annotations(interface_name)
1764
return {"org.freedesktop.DBus.Deprecated":
1766
# Find an unused name
1767
for aname in (iname.format(i)
1768
for i in itertools.count()):
1769
if aname not in attr:
1773
# Replace the class with a new subclass of it with
1774
# methods, signals, etc. as created above.
1775
if sys.version_info.major == 2:
1776
cls = type(b"{}Alternate".format(cls.__name__),
1779
cls = type("{}Alternate".format(cls.__name__),
1786
@alternate_dbus_interfaces({"se.recompile.Mandos":
1787
"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)
1788
992
class ClientDBus(Client, DBusObjectWithProperties):
1789
993
"""A Client class using D-Bus
1792
996
dbus_object_path: dbus.ObjectPath
1793
997
bus: dbus.SystemBus()
1796
1000
runtime_expansions = (Client.runtime_expansions
1797
+ ("dbus_object_path", ))
1799
_interface = "se.recompile.Mandos.Client"
1001
+ ("dbus_object_path",))
1801
1003
# dbus.service.Object doesn't use super(), so we can't either.
1803
def __init__(self, bus=None, *args, **kwargs):
1005
def __init__(self, bus = None, *args, **kwargs):
1805
1007
Client.__init__(self, *args, **kwargs)
1009
self._approvals_pending = 0
1806
1010
# Only now, when this client is initialized, can it show up on
1808
client_object_name = str(self.name).translate(
1012
client_object_name = unicode(self.name).translate(
1809
1013
{ord("."): ord("_"),
1810
1014
ord("-"): ord("_")})
1811
self.dbus_object_path = dbus.ObjectPath(
1812
"/clients/" + client_object_name)
1015
self.dbus_object_path = (dbus.ObjectPath
1016
("/clients/" + client_object_name))
1813
1017
DBusObjectWithProperties.__init__(self, self.bus,
1814
1018
self.dbus_object_path)
1816
def notifychangeproperty(transform_func, dbus_name,
1817
type_func=lambda x: x,
1819
invalidate_only=False,
1820
_interface=_interface):
1020
def notifychangeproperty(transform_func,
1021
dbus_name, type_func=lambda x: x,
1821
1023
""" Modify a variable so that it's a property which announces
1822
1024
its changes to DBus.
1824
1026
transform_fun: Function that takes a value and a variant_level
1825
1027
and transforms it to a D-Bus type.
1826
1028
dbus_name: D-Bus name of the variable
2217
1384
self.start_checker()
2219
1386
self.stop_checker()
2221
1388
# ObjectPath - property
2223
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
2224
"org.freedesktop.DBus.Deprecated": "true"})
2225
1389
@dbus_service_property(_interface, signature="o", access="read")
2226
1390
def ObjectPath_dbus_property(self):
2227
return self.dbus_object_path # is already a dbus.ObjectPath
1391
return self.dbus_object_path # is already a dbus.ObjectPath
2229
1393
# Secret = property
2231
{"org.freedesktop.DBus.Property.EmitsChangedSignal":
2233
@dbus_service_property(_interface,
1394
@dbus_service_property(_interface, signature="ay",
1395
access="write", byte_arrays=True)
2237
1396
def Secret_dbus_property(self, value):
2238
self.secret = bytes(value)
1397
self.secret = str(value)
2244
def __init__(self, child_pipe, key_id, fpr, address):
1402
class ProxyClient(object):
1403
def __init__(self, child_pipe, fpr, address):
2245
1404
self._pipe = child_pipe
2246
self._pipe.send(('init', key_id, fpr, address))
1405
self._pipe.send(('init', fpr, address))
2247
1406
if not self._pipe.recv():
2248
raise KeyError(key_id or fpr)
2250
1409
def __getattribute__(self, name):
1410
if(name == '_pipe'):
2252
1411
return super(ProxyClient, self).__getattribute__(name)
2253
1412
self._pipe.send(('getattr', name))
2254
1413
data = self._pipe.recv()
2255
1414
if data[0] == 'data':
2257
1416
if data[0] == 'function':
2259
1417
def func(*args, **kwargs):
2260
1418
self._pipe.send(('funcall', name, args, kwargs))
2261
1419
return self._pipe.recv()[1]
2265
1422
def __setattr__(self, name, value):
1423
if(name == '_pipe'):
2267
1424
return super(ProxyClient, self).__setattr__(name, value)
2268
1425
self._pipe.send(('setattr', name, value))
1428
class ClientDBusTransitional(ClientDBus):
1429
__metaclass__ = AlternateDBusNamesMetaclass
2271
1432
class ClientHandler(socketserver.BaseRequestHandler, object):
2272
1433
"""A class to handle client connections.
2274
1435
Instantiated once for each connection to handle it.
2275
1436
Note: This will run in its own forked process."""
2277
1438
def handle(self):
2278
1439
with contextlib.closing(self.server.child_pipe) as child_pipe:
2279
1440
logger.info("TCP connection from: %s",
2280
str(self.client_address))
1441
unicode(self.client_address))
2281
1442
logger.debug("Pipe FD: %d",
2282
1443
self.server.child_pipe.fileno())
2284
session = gnutls.ClientSession(self.request)
2286
# priority = ':'.join(("NONE", "+VERS-TLS1.1",
2287
# "+AES-256-CBC", "+SHA1",
2288
# "+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",
2290
1459
# Use a fallback default, since this MUST be set.
2291
1460
priority = self.server.gnutls_priority
2292
1461
if priority is None:
2293
1462
priority = "NORMAL"
2294
gnutls.priority_set_direct(session._c_object,
2295
priority.encode("utf-8"),
1463
(gnutls.library.functions
1464
.gnutls_priority_set_direct(session._c_object,
2298
1467
# Start communication using the Mandos protocol
2299
1468
# Get protocol number
2300
1469
line = self.request.makefile().readline()
2301
1470
logger.debug("Protocol version: %r", line)
2303
1472
if int(line.strip().split()[0]) > 1:
2304
raise RuntimeError(line)
2305
1474
except (ValueError, IndexError, RuntimeError) as error:
2306
1475
logger.error("Unknown protocol version: %s", error)
2309
1478
# Start GnuTLS connection
2311
1480
session.handshake()
2312
except gnutls.Error as error:
1481
except gnutls.errors.GNUTLSError as error:
2313
1482
logger.warning("Handshake failed: %s", error)
2314
1483
# Do not run session.bye() here: the session is not
2315
1484
# established. Just abandon the request.
2317
1486
logger.debug("Handshake succeeded")
2319
1488
approval_required = False
2321
if gnutls.has_rawpk:
2324
key_id = self.key_id(
2325
self.peer_certificate(session))
2326
except (TypeError, gnutls.Error) as error:
2327
logger.warning("Bad certificate: %s", error)
2329
logger.debug("Key ID: %s", key_id)
2334
fpr = self.fingerprint(
2335
self.peer_certificate(session))
2336
except (TypeError, gnutls.Error) as error:
2337
logger.warning("Bad certificate: %s", error)
2339
logger.debug("Fingerprint: %s", fpr)
2342
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,
2343
1504
self.client_address)
2344
1505
except KeyError:
2347
1508
if client.approval_delay:
2348
1509
delay = client.approval_delay
2349
1510
client.approvals_pending += 1
2350
1511
approval_required = True
2353
1514
if not client.enabled:
2354
1515
logger.info("Client %s is disabled",
2356
1517
if self.server.use_dbus:
2357
1518
# Emit D-Bus signal
2358
1519
client.Rejected("Disabled")
2361
if client.approved or not client.approval_delay:
2362
# We are approved or approval is disabled
1522
if client._approved or not client.approval_delay:
1523
#We are approved or approval is disabled
2364
elif client.approved is None:
1525
elif client._approved is None:
2365
1526
logger.info("Client %s needs approval",
2367
1528
if self.server.use_dbus:
2368
1529
# Emit D-Bus signal
2369
1530
client.NeedApproval(
2370
client.approval_delay.total_seconds()
2371
* 1000, client.approved_by_default)
1531
client.approval_delay_milliseconds(),
1532
client.approved_by_default)
2373
1534
logger.warning("Client %s was not approved",
3086
2039
use_ipv6 = server_settings["use_ipv6"]
3087
2040
stored_state_path = os.path.join(server_settings["statedir"],
3088
2041
stored_state_file)
3089
foreground = server_settings["foreground"]
3090
zeroconf = server_settings["zeroconf"]
3093
initlogger(debug, logging.DEBUG)
2044
initlogger(logging.DEBUG)
3095
2046
if not debuglevel:
3098
2049
level = getattr(logging, debuglevel.upper())
3099
initlogger(debug, level)
3101
2052
if server_settings["servicename"] != "Mandos":
3102
syslogger.setFormatter(
3103
logging.Formatter('Mandos ({}) [%(process)d]:'
3104
' %(levelname)s: %(message)s'.format(
3105
server_settings["servicename"])))
2053
syslogger.setFormatter(logging.Formatter
2054
('Mandos (%s) [%%(process)d]:'
2055
' %%(levelname)s: %%(message)s'
2056
% server_settings["servicename"]))
3107
2058
# Parse config file with clients
3108
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)
3109
2068
client_config.read(os.path.join(server_settings["configdir"],
3110
2069
"clients.conf"))
3112
2071
global mandos_dbus_service
3113
2072
mandos_dbus_service = None
3116
if server_settings["socket"] != "":
3117
socketfd = server_settings["socket"]
3118
tcp_server = MandosServer(
3119
(server_settings["address"], server_settings["port"]),
3121
interface=(server_settings["interface"] or None),
3123
gnutls_priority=server_settings["priority"],
3127
pidfilename = "/run/mandos.pid"
3128
if not os.path.isdir("/run/."):
3129
pidfilename = "/var/run/mandos.pid"
3132
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
3133
except IOError as e:
3134
logger.error("Could not open file %r", pidfilename,
3137
for name, group in (("_mandos", "_mandos"),
3138
("mandos", "mandos"),
3139
("nobody", "nogroup")):
3141
uid = pwd.getpwnam(name).pw_uid
3142
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
3144
2097
except KeyError:
2099
uid = pwd.getpwnam("nobody").pw_uid
2100
gid = pwd.getpwnam("nobody").pw_gid
3153
logger.debug("Did setuid/setgid to {}:{}".format(uid,
3155
2107
except OSError as error:
3156
logger.warning("Failed to setuid/setgid to {}:{}: {}"
3157
.format(uid, gid, os.strerror(error.errno)))
3158
if error.errno != errno.EPERM:
2108
if error[0] != errno.EPERM:
3162
2112
# Enable all possible GnuTLS debugging
3164
2114
# "Use a log level over 10 to enable all debugging options."
3165
2115
# - GnuTLS manual
3166
gnutls.global_set_log_level(11)
2116
gnutls.library.functions.gnutls_global_set_log_level(11)
2118
@gnutls.library.types.gnutls_log_func
3169
2119
def debug_gnutls(level, string):
3170
2120
logger.debug("GnuTLS: %s", string[:-1])
3172
gnutls.global_set_log_function(debug_gnutls)
2122
(gnutls.library.functions
2123
.gnutls_global_set_log_function(debug_gnutls))
3174
2125
# Redirect stdin so all checkers get /dev/null
3175
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2126
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
3176
2127
os.dup2(null, sys.stdin.fileno())
2131
# No console logging
2132
logger.removeHandler(console)
3180
2134
# Need to fork before connecting to D-Bus
3182
2136
# Close all input and output, do double fork, etc.
3185
if gi.version_info < (3, 10, 2):
3186
# multiprocessing will use threads, so before we use GLib we
3187
# need to inform GLib that threads will be used.
3190
2139
global main_loop
3191
2140
# From the Avahi example code
3192
DBusGMainLoop(set_as_default=True)
3193
main_loop = GLib.MainLoop()
2141
DBusGMainLoop(set_as_default=True )
2142
main_loop = gobject.MainLoop()
3194
2143
bus = dbus.SystemBus()
3195
2144
# End of Avahi example code
3198
2147
bus_name = dbus.service.BusName("se.recompile.Mandos",
3201
old_bus_name = dbus.service.BusName(
3202
"se.bsnet.fukt.Mandos", bus,
3204
except dbus.exceptions.DBusException as e:
3205
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")
3206
2154
use_dbus = False
3207
2155
server_settings["use_dbus"] = False
3208
2156
tcp_server.use_dbus = False
3210
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3211
service = AvahiServiceToSyslog(
3212
name=server_settings["servicename"],
3213
servicetype="_mandos._tcp",
3216
if server_settings["interface"]:
3217
service.interface = if_nametoindex(
3218
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"])))
3220
2166
global multiprocessing_manager
3221
2167
multiprocessing_manager = multiprocessing.Manager()
3223
2169
client_class = Client
3225
client_class = functools.partial(ClientDBus, bus=bus)
3227
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())
3228
2194
old_client_settings = {}
3231
# This is used to redirect stdout and stderr for checker processes
3233
wnull = open(os.devnull, "w") # A writable /dev/null
3234
# Only used if server is running in foreground but not in debug
3236
if debug or not foreground:
3239
2197
# Get client data and settings from last running state.
3240
2198
if server_settings["restore"]:
3242
2200
with open(stored_state_path, "rb") as stored_state:
3243
if sys.version_info.major == 2:
3244
clients_data, old_client_settings = pickle.load(
3247
bytes_clients_data, bytes_old_client_settings = (
3248
pickle.load(stored_state, encoding="bytes"))
3249
# Fix bytes to strings
3252
clients_data = {(key.decode("utf-8")
3253
if isinstance(key, bytes)
3256
bytes_clients_data.items()}
3257
del bytes_clients_data
3258
for key in clients_data:
3259
value = {(k.decode("utf-8")
3260
if isinstance(k, bytes) else k): v
3262
clients_data[key].items()}
3263
clients_data[key] = value
3265
value["client_structure"] = [
3267
if isinstance(s, bytes)
3269
value["client_structure"]]
3270
# .name, .host, and .checker_command
3271
for k in ("name", "host", "checker_command"):
3272
if isinstance(value[k], bytes):
3273
value[k] = value[k].decode("utf-8")
3274
if "key_id" not in value:
3275
value["key_id"] = ""
3276
elif "fingerprint" not in value:
3277
value["fingerprint"] = ""
3278
# old_client_settings
3280
old_client_settings = {
3281
(key.decode("utf-8")
3282
if isinstance(key, bytes)
3285
bytes_old_client_settings.items()}
3286
del bytes_old_client_settings
3287
# .host and .checker_command
3288
for value in old_client_settings.values():
3289
for attribute in ("host", "checker_command"):
3290
if isinstance(value[attribute], bytes):
3291
value[attribute] = (value[attribute]
2201
clients_data, old_client_settings = (pickle.load
3293
2203
os.remove(stored_state_path)
3294
2204
except IOError as e:
3295
if e.errno == errno.ENOENT:
3296
logger.warning("Could not load persistent state:"
3297
" {}".format(os.strerror(e.errno)))
3299
logger.critical("Could not load persistent state:",
2205
logger.warning("Could not load persistent state: {0}"
2207
if e.errno != errno.ENOENT:
3302
except EOFError as e:
3303
logger.warning("Could not load persistent state: "
3307
with PGPEngine() as pgp:
3308
for client_name, client in clients_data.items():
3309
# Skip removed clients
3310
if client_name not in client_settings:
2210
with Crypto() as crypt:
2211
for client in clients_data:
2212
client_name = client["name"]
3313
2214
# Decide which value to use after restoring saved state.
3314
2215
# We have three different values: Old config file,
3315
2216
# new config file, and saved state.
3320
2221
# For each value in new config, check if it
3321
2222
# differs from the old config value (Except for
3322
2223
# the "secret" attribute)
3323
if (name != "secret"
3325
old_client_settings[client_name][name])):
3326
client[name] = value
2224
if (name != "secret" and
2225
value != old_client_settings[client_name]
2227
setattr(client, name, value)
3327
2228
except KeyError:
3330
2231
# Clients who has passed its expire date can still be
3331
# enabled if its last checker was successful. A Client
3332
# whose checker succeeded before we stored its state is
3333
# assumed to have successfully run all checkers during
3335
if client["enabled"]:
3336
if datetime.datetime.utcnow() >= client["expires"]:
3337
if not client["last_checked_ok"]:
3339
"disabling client {} - Client never "
3340
"performed a successful checker".format(
3342
client["enabled"] = False
3343
elif client["last_checker_status"] != 0:
3345
"disabling client {} - Client last"
3346
" checker failed with error code"
3349
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:
3350
2240
client["enabled"] = False
3352
client["expires"] = (
3353
datetime.datetime.utcnow()
3354
+ client["timeout"])
3355
logger.debug("Last checker succeeded,"
3356
" 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],
3359
client["secret"] = pgp.decrypt(
3360
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 = (
3361
2283
client_settings[client_name]["secret"])
3363
# If decryption fails, we use secret from new settings
3364
logger.debug("Failed to decrypt {} old secret".format(
3366
client["secret"] = (client_settings[client_name]
3369
# Add/remove clients based on new changes made to config
3370
for client_name in (set(old_client_settings)
3371
- set(client_settings)):
3372
del clients_data[client_name]
3373
for client_name in (set(client_settings)
3374
- set(old_client_settings)):
3375
clients_data[client_name] = client_settings[client_name]
3377
# Create all client objects
3378
for client_name, client in clients_data.items():
3379
tcp_server.clients[client_name] = client_class(
3382
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
3384
2295
if not tcp_server.clients:
3385
2296
logger.warning("No clients defined")
3388
if pidfile is not None:
3392
print(pid, file=pidfile)
3394
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
3397
2310
del pidfilename
3399
for termsig in (signal.SIGHUP, signal.SIGTERM):
3400
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3401
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())
3405
@alternate_dbus_interfaces(
3406
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3407
class MandosDBusService(DBusObjectWithObjectManager):
2318
class MandosDBusService(dbus.service.Object):
3408
2319
"""A D-Bus proxy object"""
3410
2320
def __init__(self):
3411
2321
dbus.service.Object.__init__(self, bus, "/")
3413
2322
_interface = "se.recompile.Mandos"
3415
2324
@dbus.service.signal(_interface, signature="o")
3416
2325
def ClientAdded(self, objpath):
3420
2329
@dbus.service.signal(_interface, signature="ss")
3421
def ClientNotFound(self, key_id, address):
2330
def ClientNotFound(self, fingerprint, address):
3425
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3427
2334
@dbus.service.signal(_interface, signature="os")
3428
2335
def ClientRemoved(self, objpath, name):
3432
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3434
2339
@dbus.service.method(_interface, out_signature="ao")
3435
2340
def GetAllClients(self):
3437
return dbus.Array(c.dbus_object_path for c in
3438
tcp_server.clients.values())
3440
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
2342
return dbus.Array(c.dbus_object_path
2344
tcp_server.clients.itervalues())
3442
2346
@dbus.service.method(_interface,
3443
2347
out_signature="a{oa{sv}}")
3444
2348
def GetAllClientsWithProperties(self):
3446
2350
return dbus.Dictionary(
3447
{c.dbus_object_path: c.GetAll(
3448
"se.recompile.Mandos.Client")
3449
for c in tcp_server.clients.values()},
2351
((c.dbus_object_path, c.GetAll(""))
2352
for c in tcp_server.clients.itervalues()),
3450
2353
signature="oa{sv}")
3452
2355
@dbus.service.method(_interface, in_signature="o")
3453
2356
def RemoveClient(self, object_path):
3455
for c in tcp_server.clients.values():
2358
for c in tcp_server.clients.itervalues():
3456
2359
if c.dbus_object_path == object_path:
3457
2360
del tcp_server.clients[c.name]
3458
2361
c.remove_from_connection()
3459
# Don't signal the disabling
2362
# Don't signal anything except ClientRemoved
3460
2363
c.disable(quiet=True)
3461
# Emit D-Bus signal for removal
3462
self.client_removed_signal(c)
2365
self.ClientRemoved(object_path, c.name)
3464
2367
raise KeyError(object_path)
3468
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3469
out_signature="a{oa{sa{sv}}}")
3470
def GetManagedObjects(self):
3472
return dbus.Dictionary(
3473
{client.dbus_object_path:
3475
{interface: client.GetAll(interface)
3477
client._get_all_interface_names()})
3478
for client in tcp_server.clients.values()})
3480
def client_added_signal(self, client):
3481
"""Send the new standard signal and the old signal"""
3483
# New standard signal
3484
self.InterfacesAdded(
3485
client.dbus_object_path,
3487
{interface: client.GetAll(interface)
3489
client._get_all_interface_names()}))
3491
self.ClientAdded(client.dbus_object_path)
3493
def client_removed_signal(self, client):
3494
"""Send the new standard signal and the old signal"""
3496
# New standard signal
3497
self.InterfacesRemoved(
3498
client.dbus_object_path,
3499
client._get_all_interface_names())
3501
self.ClientRemoved(client.dbus_object_path,
3504
mandos_dbus_service = MandosDBusService()
3506
# Save modules to variables to exempt the modules from being
3507
# unloaded before the function registered with atexit() is run.
3508
mp = multiprocessing
2371
class MandosDBusServiceTransitional(MandosDBusService):
2372
__metaclass__ = AlternateDBusNamesMetaclass
2373
mandos_dbus_service = MandosDBusServiceTransitional()
3512
2376
"Cleanup function; run on exit"
3516
mp.active_children()
2379
multiprocessing.active_children()
3518
2380
if not (tcp_server.clients or client_settings):
3521
2383
# Store client before exiting. Secrets are encrypted with key
3522
2384
# based on what config file has. If config file is
3523
2385
# removed/edited, old secret will thus be unrecovable.
3525
with PGPEngine() as pgp:
3526
for client in tcp_server.clients.values():
2387
with Crypto() as crypt:
2388
for client in tcp_server.clients.itervalues():
3527
2389
key = client_settings[client.name]["secret"]
3528
client.encrypted_secret = pgp.encrypt(client.secret,
2390
client.encrypted_secret = crypt.encrypt(client.secret,
3530
2392
client_dict = {}
3532
# A list of attributes that can not be pickled
3534
exclude = {"bus", "changedstate", "secret",
3535
"checker", "server_settings"}
3536
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)):
3538
2399
exclude.add(name)
3540
2401
client_dict["encrypted_secret"] = (client
3541
2402
.encrypted_secret)
3542
2403
for attr in client.client_structure:
3543
2404
if attr not in exclude:
3544
2405
client_dict[attr] = getattr(client, attr)
3546
clients[client.name] = client_dict
2407
clients.append(client_dict)
3547
2408
del client_settings[client.name]["secret"]
3550
with tempfile.NamedTemporaryFile(
3554
dir=os.path.dirname(stored_state_path),
3555
delete=False) as stored_state:
3556
pickle.dump((clients, client_settings), stored_state,
3558
tempname = stored_state.name
3559
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)
3560
2415
except (IOError, OSError) as e:
3566
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
3567
logger.warning("Could not save persistent state: {}"
3568
.format(os.strerror(e.errno)))
3570
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):
3574
2421
# Delete all clients, and settings from config
3575
2422
while tcp_server.clients:
3576
2423
name, client = tcp_server.clients.popitem()
3578
2425
client.remove_from_connection()
3579
# Don't signal the disabling
2426
# Don't signal anything except ClientRemoved
3580
2427
client.disable(quiet=True)
3581
# Emit D-Bus signal for removal
3583
mandos_dbus_service.client_removed_signal(client)
2430
mandos_dbus_service.ClientRemoved(client
3584
2433
client_settings.clear()
3586
2435
atexit.register(cleanup)
3588
for client in tcp_server.clients.values():
2437
for client in tcp_server.clients.itervalues():
3590
# Emit D-Bus signal for adding
3591
mandos_dbus_service.client_added_signal(client)
2440
mandos_dbus_service.ClientAdded(client.dbus_object_path)
3592
2441
# Need to initiate checking of clients
3593
2442
if client.enabled:
3594
2443
client.init_checker()
3596
2445
tcp_server.enable()
3597
2446
tcp_server.server_activate()
3599
2448
# Find out what port we got
3601
service.port = tcp_server.socket.getsockname()[1]
2449
service.port = tcp_server.socket.getsockname()[1]
3603
2451
logger.info("Now listening on address %r, port %d,"
3604
" flowinfo %d, scope_id %d",
3605
*tcp_server.socket.getsockname())
2452
" flowinfo %d, scope_id %d"
2453
% tcp_server.socket.getsockname())
3607
logger.info("Now listening on address %r, port %d",
3608
*tcp_server.socket.getsockname())
3610
# 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]
3614
# From the Avahi example code
3617
except dbus.exceptions.DBusException as error:
3618
logger.critical("D-Bus Exception", exc_info=error)
3621
# End of Avahi example code
3624
GLib.IOChannel.unix_new(tcp_server.fileno()),
3625
GLib.PRIORITY_DEFAULT, GLib.IO_IN,
3626
lambda *args, **kwargs: (tcp_server.handle_request
3627
(*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))
3629
2475
logger.debug("Starting main loop")
3630
2476
main_loop.run()
3631
2477
except AvahiError as error:
3632
logger.critical("Avahi Error", exc_info=error)
2478
logger.critical("AvahiError: %s", error)
3635
2481
except KeyboardInterrupt: