365
488
follow_name_owner_changes=True),
366
489
avahi.DBUS_INTERFACE_SERVER)
367
490
self.server.connect_to_signal("StateChanged",
368
self.server_state_changed)
491
self.server_state_changed)
369
492
self.server_state_changed(self.server.GetState())
371
495
class AvahiServiceToSyslog(AvahiService):
496
def rename(self, *args, **kwargs):
373
497
"""Add the new name to the syslog messages"""
374
ret = AvahiService.rename(self)
375
syslogger.setFormatter(logging.Formatter
376
('Mandos (%s) [%%(process)d]:'
377
' %%(levelname)s: %%(message)s'
498
ret = super(AvahiServiceToSyslog, self).rename(*args, **kwargs)
499
syslogger.setFormatter(logging.Formatter(
500
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
381
def _timedelta_to_milliseconds(td):
382
"Convert a datetime.timedelta() to milliseconds"
383
return ((td.days * 24 * 60 * 60 * 1000)
384
+ (td.seconds * 1000)
385
+ (td.microseconds // 1000))
505
# Pretend that we have a GnuTLS module
506
class gnutls(object):
507
"""This isn't so much a class as it is a module-like namespace."""
509
library = ctypes.util.find_library("gnutls")
511
library = ctypes.util.find_library("gnutls-deb0")
512
_library = ctypes.cdll.LoadLibrary(library)
515
# Unless otherwise indicated, the constants and types below are
516
# all from the gnutls/gnutls.h C header file.
527
E_NO_CERTIFICATE_FOUND = -49
532
KEYID_USE_SHA256 = 1 # gnutls/x509.h
533
OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
536
class session_int(ctypes.Structure):
538
session_t = ctypes.POINTER(session_int)
540
class certificate_credentials_st(ctypes.Structure):
542
certificate_credentials_t = ctypes.POINTER(
543
certificate_credentials_st)
544
certificate_type_t = ctypes.c_int
546
class datum_t(ctypes.Structure):
547
_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
548
('size', ctypes.c_uint)]
550
class openpgp_crt_int(ctypes.Structure):
552
openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
553
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
554
log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
555
credentials_type_t = ctypes.c_int
556
transport_ptr_t = ctypes.c_void_p
557
close_request_t = ctypes.c_int
560
class Error(Exception):
561
def __init__(self, message=None, code=None, args=()):
562
# Default usage is by a message string, but if a return
563
# code is passed, convert it to a string with
566
if message is None and code is not None:
567
message = gnutls.strerror(code)
568
return super(gnutls.Error, self).__init__(
571
class CertificateSecurityError(Error):
575
class Credentials(object):
577
self._c_object = gnutls.certificate_credentials_t()
578
gnutls.certificate_allocate_credentials(
579
ctypes.byref(self._c_object))
580
self.type = gnutls.CRD_CERTIFICATE
583
gnutls.certificate_free_credentials(self._c_object)
585
class ClientSession(object):
586
def __init__(self, socket, credentials=None):
587
self._c_object = gnutls.session_t()
588
gnutls_flags = gnutls.CLIENT
589
if gnutls.check_version("3.5.6"):
590
gnutls_flags |= gnutls.NO_TICKETS
592
gnutls_flags |= gnutls.ENABLE_RAWPK
593
gnutls.init(ctypes.byref(self._c_object), gnutls_flags)
595
gnutls.set_default_priority(self._c_object)
596
gnutls.transport_set_ptr(self._c_object, socket.fileno())
597
gnutls.handshake_set_private_extensions(self._c_object,
600
if credentials is None:
601
credentials = gnutls.Credentials()
602
gnutls.credentials_set(self._c_object, credentials.type,
603
ctypes.cast(credentials._c_object,
605
self.credentials = credentials
608
gnutls.deinit(self._c_object)
611
return gnutls.handshake(self._c_object)
613
def send(self, data):
617
data_len -= gnutls.record_send(self._c_object,
622
return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
624
# Error handling functions
625
def _error_code(result):
626
"""A function to raise exceptions on errors, suitable
627
for the 'restype' attribute on ctypes functions"""
630
if result == gnutls.E_NO_CERTIFICATE_FOUND:
631
raise gnutls.CertificateSecurityError(code=result)
632
raise gnutls.Error(code=result)
634
def _retry_on_error(result, func, arguments):
635
"""A function to retry on some errors, suitable
636
for the 'errcheck' attribute on ctypes functions"""
638
if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
639
return _error_code(result)
640
result = func(*arguments)
643
# Unless otherwise indicated, the function declarations below are
644
# all from the gnutls/gnutls.h C header file.
647
priority_set_direct = _library.gnutls_priority_set_direct
648
priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
649
ctypes.POINTER(ctypes.c_char_p)]
650
priority_set_direct.restype = _error_code
652
init = _library.gnutls_init
653
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
654
init.restype = _error_code
656
set_default_priority = _library.gnutls_set_default_priority
657
set_default_priority.argtypes = [session_t]
658
set_default_priority.restype = _error_code
660
record_send = _library.gnutls_record_send
661
record_send.argtypes = [session_t, ctypes.c_void_p,
663
record_send.restype = ctypes.c_ssize_t
664
record_send.errcheck = _retry_on_error
666
certificate_allocate_credentials = (
667
_library.gnutls_certificate_allocate_credentials)
668
certificate_allocate_credentials.argtypes = [
669
ctypes.POINTER(certificate_credentials_t)]
670
certificate_allocate_credentials.restype = _error_code
672
certificate_free_credentials = (
673
_library.gnutls_certificate_free_credentials)
674
certificate_free_credentials.argtypes = [
675
certificate_credentials_t]
676
certificate_free_credentials.restype = None
678
handshake_set_private_extensions = (
679
_library.gnutls_handshake_set_private_extensions)
680
handshake_set_private_extensions.argtypes = [session_t,
682
handshake_set_private_extensions.restype = None
684
credentials_set = _library.gnutls_credentials_set
685
credentials_set.argtypes = [session_t, credentials_type_t,
687
credentials_set.restype = _error_code
689
strerror = _library.gnutls_strerror
690
strerror.argtypes = [ctypes.c_int]
691
strerror.restype = ctypes.c_char_p
693
certificate_type_get = _library.gnutls_certificate_type_get
694
certificate_type_get.argtypes = [session_t]
695
certificate_type_get.restype = _error_code
697
certificate_get_peers = _library.gnutls_certificate_get_peers
698
certificate_get_peers.argtypes = [session_t,
699
ctypes.POINTER(ctypes.c_uint)]
700
certificate_get_peers.restype = ctypes.POINTER(datum_t)
702
global_set_log_level = _library.gnutls_global_set_log_level
703
global_set_log_level.argtypes = [ctypes.c_int]
704
global_set_log_level.restype = None
706
global_set_log_function = _library.gnutls_global_set_log_function
707
global_set_log_function.argtypes = [log_func]
708
global_set_log_function.restype = None
710
deinit = _library.gnutls_deinit
711
deinit.argtypes = [session_t]
712
deinit.restype = None
714
handshake = _library.gnutls_handshake
715
handshake.argtypes = [session_t]
716
handshake.restype = _error_code
717
handshake.errcheck = _retry_on_error
719
transport_set_ptr = _library.gnutls_transport_set_ptr
720
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
721
transport_set_ptr.restype = None
723
bye = _library.gnutls_bye
724
bye.argtypes = [session_t, close_request_t]
725
bye.restype = _error_code
726
bye.errcheck = _retry_on_error
728
check_version = _library.gnutls_check_version
729
check_version.argtypes = [ctypes.c_char_p]
730
check_version.restype = ctypes.c_char_p
732
_need_version = b"3.3.0"
733
if check_version(_need_version) is None:
734
raise self.Error("Needs GnuTLS {} or later"
735
.format(_need_version))
737
_tls_rawpk_version = b"3.6.6"
738
has_rawpk = bool(check_version(_tls_rawpk_version))
742
class pubkey_st(ctypes.Structure):
744
pubkey_t = ctypes.POINTER(pubkey_st)
746
x509_crt_fmt_t = ctypes.c_int
748
# All the function declarations below are from gnutls/abstract.h
749
pubkey_init = _library.gnutls_pubkey_init
750
pubkey_init.argtypes = [ctypes.POINTER(pubkey_t)]
751
pubkey_init.restype = _error_code
753
pubkey_import = _library.gnutls_pubkey_import
754
pubkey_import.argtypes = [pubkey_t, ctypes.POINTER(datum_t),
756
pubkey_import.restype = _error_code
758
pubkey_get_key_id = _library.gnutls_pubkey_get_key_id
759
pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,
760
ctypes.POINTER(ctypes.c_ubyte),
761
ctypes.POINTER(ctypes.c_size_t)]
762
pubkey_get_key_id.restype = _error_code
764
pubkey_deinit = _library.gnutls_pubkey_deinit
765
pubkey_deinit.argtypes = [pubkey_t]
766
pubkey_deinit.restype = None
768
# All the function declarations below are from gnutls/openpgp.h
770
openpgp_crt_init = _library.gnutls_openpgp_crt_init
771
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
772
openpgp_crt_init.restype = _error_code
774
openpgp_crt_import = _library.gnutls_openpgp_crt_import
775
openpgp_crt_import.argtypes = [openpgp_crt_t,
776
ctypes.POINTER(datum_t),
778
openpgp_crt_import.restype = _error_code
780
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
781
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
782
ctypes.POINTER(ctypes.c_uint)]
783
openpgp_crt_verify_self.restype = _error_code
785
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
786
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
787
openpgp_crt_deinit.restype = None
789
openpgp_crt_get_fingerprint = (
790
_library.gnutls_openpgp_crt_get_fingerprint)
791
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
795
openpgp_crt_get_fingerprint.restype = _error_code
797
if check_version("3.6.4"):
798
certificate_type_get2 = _library.gnutls_certificate_type_get2
799
certificate_type_get2.argtypes = [session_t, ctypes.c_int]
800
certificate_type_get2.restype = _error_code
802
# Remove non-public functions
803
del _error_code, _retry_on_error
806
def call_pipe(connection, # : multiprocessing.Connection
807
func, *args, **kwargs):
808
"""This function is meant to be called by multiprocessing.Process
810
This function runs func(*args, **kwargs), and writes the resulting
811
return value on the provided multiprocessing.Connection.
813
connection.send(func(*args, **kwargs))
387
817
class Client(object):
388
818
"""A representation of a client host served by this server.
391
_approved: bool(); 'None' if not yet approved/disapproved
821
approved: bool(); 'None' if not yet approved/disapproved
392
822
approval_delay: datetime.timedelta(); Time to wait for approval
393
823
approval_duration: datetime.timedelta(); Duration of one approval
394
824
checker: subprocess.Popen(); a running checker process used
395
825
to see if the client lives.
396
826
'None' if no process is running.
397
checker_callback_tag: a gobject event source tag, or None
827
checker_callback_tag: a GLib event source tag, or None
398
828
checker_command: string; External command which is run to check
399
829
if client lives. %() expansions are done at
400
830
runtime with vars(self) as dict, so that for
401
831
instance %(name)s can be used in the command.
402
checker_initiator_tag: a gobject event source tag, or None
832
checker_initiator_tag: a GLib event source tag, or None
403
833
created: datetime.datetime(); (UTC) object creation
404
834
client_structure: Object describing what attributes a client has
405
835
and is used for storing the client at exit
406
836
current_checker_command: string; current running checker_command
407
disable_initiator_tag: a gobject event source tag, or None
837
disable_initiator_tag: a GLib event source tag, or None
409
839
fingerprint: string (40 or 32 hexadecimal digits); used to
410
uniquely identify the client
840
uniquely identify an OpenPGP client
841
key_id: string (64 hexadecimal digits); used to uniquely identify
842
a client using raw public keys
411
843
host: string; available for use by the checker command
412
844
interval: datetime.timedelta(); How often to start a new checker
413
845
last_approval_request: datetime.datetime(); (UTC) or None
414
846
last_checked_ok: datetime.datetime(); (UTC) or None
416
847
last_checker_status: integer between 0 and 255 reflecting exit
417
848
status of last checker. -1 reflects crashed
849
checker, -2 means no checker completed yet.
850
last_checker_signal: The signal which killed the last checker, if
851
last_checker_status is -1
419
852
last_enabled: datetime.datetime(); (UTC) or None
420
853
name: string; from the config file, used in log messages and
421
854
D-Bus identifiers
422
855
secret: bytestring; sent verbatim (over TLS) to client
423
856
timeout: datetime.timedelta(); How long from last_checked_ok
424
857
until this client is disabled
425
extended_timeout: extra long timeout when password has been sent
858
extended_timeout: extra long timeout when secret has been sent
426
859
runtime_expansions: Allowed attributes for runtime expansion.
427
860
expires: datetime.datetime(); time (UTC) when a client will be
428
861
disabled, or None
862
server_settings: The server_settings dict from main()
431
865
runtime_expansions = ("approval_delay", "approval_duration",
432
"created", "enabled", "fingerprint",
433
"host", "interval", "last_checked_ok",
866
"created", "enabled", "expires", "key_id",
867
"fingerprint", "host", "interval",
868
"last_approval_request", "last_checked_ok",
434
869
"last_enabled", "name", "timeout")
436
def timeout_milliseconds(self):
437
"Return the 'timeout' attribute in milliseconds"
438
return _timedelta_to_milliseconds(self.timeout)
440
def extended_timeout_milliseconds(self):
441
"Return the 'extended_timeout' attribute in milliseconds"
442
return _timedelta_to_milliseconds(self.extended_timeout)
444
def interval_milliseconds(self):
445
"Return the 'interval' attribute in milliseconds"
446
return _timedelta_to_milliseconds(self.interval)
448
def approval_delay_milliseconds(self):
449
return _timedelta_to_milliseconds(self.approval_delay)
451
def __init__(self, name = None, config=None):
452
"""Note: the 'checker' key in 'config' sets the
453
'checker_command' attribute and *not* the 'checker'
872
"extended_timeout": "PT15M",
874
"checker": "fping -q -- %%(host)s",
876
"approval_delay": "PT0S",
877
"approval_duration": "PT1S",
878
"approved_by_default": "True",
883
def config_parser(config):
884
"""Construct a new dict of client settings of this form:
885
{ client_name: {setting_name: value, ...}, ...}
886
with exceptions for any special settings as defined above.
887
NOTE: Must be a pure function. Must return the same result
888
value given the same arguments.
891
for client_name in config.sections():
892
section = dict(config.items(client_name))
893
client = settings[client_name] = {}
895
client["host"] = section["host"]
896
# Reformat values from string types to Python types
897
client["approved_by_default"] = config.getboolean(
898
client_name, "approved_by_default")
899
client["enabled"] = config.getboolean(client_name,
902
# Uppercase and remove spaces from key_id and fingerprint
903
# for later comparison purposes with return value from the
904
# key_id() and fingerprint() functions
905
client["key_id"] = (section.get("key_id", "").upper()
907
client["fingerprint"] = (section["fingerprint"].upper()
909
if "secret" in section:
910
client["secret"] = codecs.decode(section["secret"]
913
elif "secfile" in section:
914
with open(os.path.expanduser(os.path.expandvars
915
(section["secfile"])),
917
client["secret"] = secfile.read()
919
raise TypeError("No secret or secfile for section {}"
921
client["timeout"] = string_to_delta(section["timeout"])
922
client["extended_timeout"] = string_to_delta(
923
section["extended_timeout"])
924
client["interval"] = string_to_delta(section["interval"])
925
client["approval_delay"] = string_to_delta(
926
section["approval_delay"])
927
client["approval_duration"] = string_to_delta(
928
section["approval_duration"])
929
client["checker_command"] = section["checker"]
930
client["last_approval_request"] = None
931
client["last_checked_ok"] = None
932
client["last_checker_status"] = -2
936
def __init__(self, settings, name=None, server_settings=None):
938
if server_settings is None:
940
self.server_settings = server_settings
941
# adding all client settings
942
for setting, value in settings.items():
943
setattr(self, setting, value)
946
if not hasattr(self, "last_enabled"):
947
self.last_enabled = datetime.datetime.utcnow()
948
if not hasattr(self, "expires"):
949
self.expires = (datetime.datetime.utcnow()
952
self.last_enabled = None
458
955
logger.debug("Creating client %r", self.name)
459
# Uppercase and remove spaces from fingerprint for later
460
# comparison purposes with return value from the fingerprint()
462
self.fingerprint = (config["fingerprint"].upper()
956
logger.debug(" Key ID: %s", self.key_id)
464
957
logger.debug(" Fingerprint: %s", self.fingerprint)
465
if "secret" in config:
466
self.secret = config["secret"].decode("base64")
467
elif "secfile" in config:
468
with open(os.path.expanduser(os.path.expandvars
469
(config["secfile"])),
471
self.secret = secfile.read()
473
raise TypeError("No secret or secfile for client %s"
475
self.host = config.get("host", "")
476
self.created = datetime.datetime.utcnow()
477
self.enabled = config.get("enabled", True)
478
self.last_approval_request = None
480
self.last_enabled = datetime.datetime.utcnow()
482
self.last_enabled = None
483
self.last_checked_ok = None
484
self.last_checker_status = None
485
self.timeout = string_to_delta(config["timeout"])
486
self.extended_timeout = string_to_delta(config
487
["extended_timeout"])
488
self.interval = string_to_delta(config["interval"])
958
self.created = settings.get("created",
959
datetime.datetime.utcnow())
961
# attributes specific for this server instance
489
962
self.checker = None
490
963
self.checker_initiator_tag = None
491
964
self.disable_initiator_tag = None
493
self.expires = datetime.datetime.utcnow() + self.timeout
496
965
self.checker_callback_tag = None
497
self.checker_command = config["checker"]
498
966
self.current_checker_command = None
499
self._approved = None
500
self.approved_by_default = config.get("approved_by_default",
502
968
self.approvals_pending = 0
503
self.approval_delay = string_to_delta(
504
config["approval_delay"])
505
self.approval_duration = string_to_delta(
506
config["approval_duration"])
507
self.changedstate = (multiprocessing_manager
508
.Condition(multiprocessing_manager
510
self.client_structure = [attr for attr in
511
self.__dict__.iterkeys()
969
self.changedstate = multiprocessing_manager.Condition(
970
multiprocessing_manager.Lock())
971
self.client_structure = [attr
972
for attr in self.__dict__.keys()
512
973
if not attr.startswith("_")]
513
974
self.client_structure.append("client_structure")
515
for name, t in inspect.getmembers(type(self),
976
for name, t in inspect.getmembers(
977
type(self), lambda obj: isinstance(obj, property)):
519
978
if not name.startswith("_"):
520
979
self.client_structure.append(name)
522
981
# Send notice to process children that client state has changed
523
982
def send_changedstate(self):
524
983
with self.changedstate:
525
984
self.changedstate.notify_all()
527
986
def enable(self):
528
987
"""Start this client's checker and timeout hooks"""
529
988
if getattr(self, "enabled", False):
530
989
# Already enabled
532
self.send_changedstate()
533
991
self.expires = datetime.datetime.utcnow() + self.timeout
534
992
self.enabled = True
535
993
self.last_enabled = datetime.datetime.utcnow()
536
994
self.init_checker()
995
self.send_changedstate()
538
997
def disable(self, quiet=True):
539
998
"""Disable this client."""
540
999
if not getattr(self, "enabled", False):
543
self.send_changedstate()
545
1002
logger.info("Disabling client %s", self.name)
546
if getattr(self, "disable_initiator_tag", False):
547
gobject.source_remove(self.disable_initiator_tag)
1003
if getattr(self, "disable_initiator_tag", None) is not None:
1004
GLib.source_remove(self.disable_initiator_tag)
548
1005
self.disable_initiator_tag = None
549
1006
self.expires = None
550
if getattr(self, "checker_initiator_tag", False):
551
gobject.source_remove(self.checker_initiator_tag)
1007
if getattr(self, "checker_initiator_tag", None) is not None:
1008
GLib.source_remove(self.checker_initiator_tag)
552
1009
self.checker_initiator_tag = None
553
1010
self.stop_checker()
554
1011
self.enabled = False
555
# Do not run this again if called by a gobject.timeout_add
1013
self.send_changedstate()
1014
# Do not run this again if called by a GLib.timeout_add
558
1017
def __del__(self):
561
1020
def init_checker(self):
562
1021
# Schedule a new checker to be started an 'interval' from now,
563
1022
# and every interval from then on.
564
self.checker_initiator_tag = (gobject.timeout_add
565
(self.interval_milliseconds(),
1023
if self.checker_initiator_tag is not None:
1024
GLib.source_remove(self.checker_initiator_tag)
1025
self.checker_initiator_tag = GLib.timeout_add(
1026
int(self.interval.total_seconds() * 1000),
567
1028
# Schedule a disable() when 'timeout' has passed
568
self.disable_initiator_tag = (gobject.timeout_add
569
(self.timeout_milliseconds(),
1029
if self.disable_initiator_tag is not None:
1030
GLib.source_remove(self.disable_initiator_tag)
1031
self.disable_initiator_tag = GLib.timeout_add(
1032
int(self.timeout.total_seconds() * 1000), self.disable)
571
1033
# Also start a new checker *right now*.
572
1034
self.start_checker()
574
def checker_callback(self, pid, condition, command):
1036
def checker_callback(self, source, condition, connection,
575
1038
"""The checker has completed, so take appropriate actions."""
576
1039
self.checker_callback_tag = None
577
1040
self.checker = None
578
if os.WIFEXITED(condition):
579
self.last_checker_status = os.WEXITSTATUS(condition)
1041
# Read return code from connection (see call_pipe)
1042
returncode = connection.recv()
1046
self.last_checker_status = returncode
1047
self.last_checker_signal = None
580
1048
if self.last_checker_status == 0:
581
1049
logger.info("Checker for %(name)s succeeded",
583
1051
self.checked_ok()
585
logger.info("Checker for %(name)s failed",
1053
logger.info("Checker for %(name)s failed", vars(self))
588
1055
self.last_checker_status = -1
1056
self.last_checker_signal = -returncode
589
1057
logger.warning("Checker for %(name)s crashed?",
592
def checked_ok(self, timeout=None):
593
"""Bump up the timeout for this client.
595
This should only be called when the client has been seen,
1061
def checked_ok(self):
1062
"""Assert that the client has been seen, alive and well."""
1063
self.last_checked_ok = datetime.datetime.utcnow()
1064
self.last_checker_status = 0
1065
self.last_checker_signal = None
1068
def bump_timeout(self, timeout=None):
1069
"""Bump up the timeout for this client."""
598
1070
if timeout is None:
599
1071
timeout = self.timeout
600
self.last_checked_ok = datetime.datetime.utcnow()
601
1072
if self.disable_initiator_tag is not None:
602
gobject.source_remove(self.disable_initiator_tag)
1073
GLib.source_remove(self.disable_initiator_tag)
1074
self.disable_initiator_tag = None
603
1075
if getattr(self, "enabled", False):
604
self.disable_initiator_tag = (gobject.timeout_add
605
(_timedelta_to_milliseconds
606
(timeout), self.disable))
1076
self.disable_initiator_tag = GLib.timeout_add(
1077
int(timeout.total_seconds() * 1000), self.disable)
607
1078
self.expires = datetime.datetime.utcnow() + timeout
609
1080
def need_approval(self):
610
1081
self.last_approval_request = datetime.datetime.utcnow()
612
1083
def start_checker(self):
613
1084
"""Start a new checker subprocess if one is not running.
615
1086
If a checker already exists, leave it running and do
617
1088
# The reason for not killing a running checker is that if we
618
# did that, then if a checker (for some reason) started
619
# running slowly and taking more than 'interval' time, the
620
# client would inevitably timeout, since no checker would get
621
# a chance to run to completion. If we instead leave running
1089
# did that, and if a checker (for some reason) started running
1090
# slowly and taking more than 'interval' time, then the client
1091
# would inevitably timeout, since no checker would get a
1092
# chance to run to completion. If we instead leave running
622
1093
# checkers alone, the checker would have to take more time
623
1094
# than 'timeout' for the client to be disabled, which is as it
626
# If a checker exists, make sure it is not a zombie
628
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
629
except (AttributeError, OSError) as error:
630
if (isinstance(error, OSError)
631
and error.errno != errno.ECHILD):
635
logger.warning("Checker was a zombie")
636
gobject.source_remove(self.checker_callback_tag)
637
self.checker_callback(pid, status,
638
self.current_checker_command)
1097
if self.checker is not None and not self.checker.is_alive():
1098
logger.warning("Checker was not alive; joining")
639
1101
# Start a new checker if needed
640
1102
if self.checker is None:
1103
# Escape attributes for the shell
1105
attr: re.escape(str(getattr(self, attr)))
1106
for attr in self.runtime_expansions}
642
# In case checker_command has exactly one % operator
643
command = self.checker_command % self.host
645
# Escape attributes for the shell
646
escaped_attrs = dict(
648
re.escape(unicode(str(getattr(self, attr, "")),
652
self.runtime_expansions)
655
command = self.checker_command % escaped_attrs
656
except TypeError as error:
657
logger.error('Could not format string "%s":'
658
' %s', self.checker_command, error)
659
return True # Try again later
1108
command = self.checker_command % escaped_attrs
1109
except TypeError as error:
1110
logger.error('Could not format string "%s"',
1111
self.checker_command,
1113
return True # Try again later
660
1114
self.current_checker_command = command
662
logger.info("Starting checker %r for %s",
664
# We don't need to redirect stdout and stderr, since
665
# in normal mode, that is already done by daemon(),
666
# and in debug mode we don't want to. (Stdin is
667
# always replaced by /dev/null.)
668
self.checker = subprocess.Popen(command,
671
self.checker_callback_tag = (gobject.child_watch_add
673
self.checker_callback,
675
# The checker may have completed before the gobject
676
# watch was added. Check for this.
677
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
679
gobject.source_remove(self.checker_callback_tag)
680
self.checker_callback(pid, status, command)
681
except OSError as error:
682
logger.error("Failed to start subprocess: %s",
684
# Re-run this periodically if run by gobject.timeout_add
1115
logger.info("Starting checker %r for %s", command,
1117
# We don't need to redirect stdout and stderr, since
1118
# in normal mode, that is already done by daemon(),
1119
# and in debug mode we don't want to. (Stdin is
1120
# always replaced by /dev/null.)
1121
# The exception is when not debugging but nevertheless
1122
# running in the foreground; use the previously
1124
popen_args = {"close_fds": True,
1127
if (not self.server_settings["debug"]
1128
and self.server_settings["foreground"]):
1129
popen_args.update({"stdout": wnull,
1131
pipe = multiprocessing.Pipe(duplex=False)
1132
self.checker = multiprocessing.Process(
1134
args=(pipe[1], subprocess.call, command),
1136
self.checker.start()
1137
self.checker_callback_tag = GLib.io_add_watch(
1138
pipe[0].fileno(), GLib.IO_IN,
1139
self.checker_callback, pipe[0], command)
1140
# Re-run this periodically if run by GLib.timeout_add
687
1143
def stop_checker(self):
688
1144
"""Force the checker process, if any, to stop."""
689
1145
if self.checker_callback_tag:
690
gobject.source_remove(self.checker_callback_tag)
1146
GLib.source_remove(self.checker_callback_tag)
691
1147
self.checker_callback_tag = None
692
1148
if getattr(self, "checker", None) is None:
694
1150
logger.debug("Stopping checker for %(name)s", vars(self))
696
os.kill(self.checker.pid, signal.SIGTERM)
698
#if self.checker.poll() is None:
699
# os.kill(self.checker.pid, signal.SIGKILL)
700
except OSError as error:
701
if error.errno != errno.ESRCH: # No such process
1151
self.checker.terminate()
703
1152
self.checker = None
706
def dbus_service_property(dbus_interface, signature="v",
707
access="readwrite", byte_arrays=False):
1155
def dbus_service_property(dbus_interface,
708
1159
"""Decorators for marking methods of a DBusObjectWithProperties to
709
1160
become properties on the D-Bus.
711
1162
The decorated method will be called with no arguments by "Get"
712
1163
and with one argument by "Set".
714
1165
The parameters, where they are supported, are the same as
715
1166
dbus.service.method, except there is only "signature", since the
716
1167
type from Get() and the type sent to Set() is the same.
886
1500
except (AttributeError, xml.dom.DOMException,
887
1501
xml.parsers.expat.ExpatError) as error:
888
1502
logger.error("Failed to override Introspection method",
893
def datetime_to_dbus (dt, variant_level=0):
1508
dbus.OBJECT_MANAGER_IFACE
1509
except AttributeError:
1510
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1513
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1514
"""A D-Bus object with an ObjectManager.
1516
Classes inheriting from this exposes the standard
1517
GetManagedObjects call and the InterfacesAdded and
1518
InterfacesRemoved signals on the standard
1519
"org.freedesktop.DBus.ObjectManager" interface.
1521
Note: No signals are sent automatically; they must be sent
1524
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1525
out_signature="a{oa{sa{sv}}}")
1526
def GetManagedObjects(self):
1527
"""This function must be overridden"""
1528
raise NotImplementedError()
1530
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1531
signature="oa{sa{sv}}")
1532
def InterfacesAdded(self, object_path, interfaces_and_properties):
1535
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1536
def InterfacesRemoved(self, object_path, interfaces):
1539
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1541
path_keyword='object_path',
1542
connection_keyword='connection')
1543
def Introspect(self, object_path, connection):
1544
"""Overloading of standard D-Bus method.
1546
Override return argument name of GetManagedObjects to be
1547
"objpath_interfaces_and_properties"
1549
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1553
document = xml.dom.minidom.parseString(xmlstring)
1555
for if_tag in document.getElementsByTagName("interface"):
1556
# Fix argument name for the GetManagedObjects method
1557
if (if_tag.getAttribute("name")
1558
== dbus.OBJECT_MANAGER_IFACE):
1559
for cn in if_tag.getElementsByTagName("method"):
1560
if (cn.getAttribute("name")
1561
== "GetManagedObjects"):
1562
for arg in cn.getElementsByTagName("arg"):
1563
if (arg.getAttribute("direction")
1567
"objpath_interfaces"
1569
xmlstring = document.toxml("utf-8")
1571
except (AttributeError, xml.dom.DOMException,
1572
xml.parsers.expat.ExpatError) as error:
1573
logger.error("Failed to override Introspection method",
1578
def datetime_to_dbus(dt, variant_level=0):
894
1579
"""Convert a UTC datetime.datetime() to a D-Bus type."""
896
return dbus.String("", variant_level = variant_level)
897
return dbus.String(dt.isoformat(),
898
variant_level=variant_level)
901
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
903
"""Applied to an empty subclass of a D-Bus object, this metaclass
904
will add additional D-Bus attributes matching a certain pattern.
1581
return dbus.String("", variant_level=variant_level)
1582
return dbus.String(dt.isoformat(), variant_level=variant_level)
1585
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1586
"""A class decorator; applied to a subclass of
1587
dbus.service.Object, it will add alternate D-Bus attributes with
1588
interface names according to the "alt_interface_names" mapping.
1591
@alternate_dbus_interfaces({"org.example.Interface":
1592
"net.example.AlternateInterface"})
1593
class SampleDBusObject(dbus.service.Object):
1594
@dbus.service.method("org.example.Interface")
1595
def SampleDBusMethod():
1598
The above "SampleDBusMethod" on "SampleDBusObject" will be
1599
reachable via two interfaces: "org.example.Interface" and
1600
"net.example.AlternateInterface", the latter of which will have
1601
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1602
"true", unless "deprecate" is passed with a False value.
1604
This works for methods and signals, and also for D-Bus properties
1605
(from DBusObjectWithProperties) and interfaces (from the
1606
dbus_interface_annotations decorator).
906
def __new__(mcs, name, bases, attr):
907
# Go through all the base classes which could have D-Bus
908
# methods, signals, or properties in them
909
for base in (b for b in bases
910
if issubclass(b, dbus.service.Object)):
911
# Go though all attributes of the base class
912
for attrname, attribute in inspect.getmembers(base):
1610
for orig_interface_name, alt_interface_name in (
1611
alt_interface_names.items()):
1613
interface_names = set()
1614
# Go though all attributes of the class
1615
for attrname, attribute in inspect.getmembers(cls):
913
1616
# Ignore non-D-Bus attributes, and D-Bus attributes
914
1617
# with the wrong interface name
915
1618
if (not hasattr(attribute, "_dbus_interface")
916
or not attribute._dbus_interface
917
.startswith("se.recompile.Mandos")):
1619
or not attribute._dbus_interface.startswith(
1620
orig_interface_name)):
919
1622
# Create an alternate D-Bus interface name based on
920
1623
# the current name
921
alt_interface = (attribute._dbus_interface
922
.replace("se.recompile.Mandos",
923
"se.bsnet.fukt.Mandos"))
1624
alt_interface = attribute._dbus_interface.replace(
1625
orig_interface_name, alt_interface_name)
1626
interface_names.add(alt_interface)
924
1627
# Is this a D-Bus signal?
925
1628
if getattr(attribute, "_dbus_is_signal", False):
926
# Extract the original non-method function by
928
nonmethod_func = (dict(
1629
# Extract the original non-method undecorated
1630
# function by black magic
1631
if sys.version_info.major == 2:
1632
nonmethod_func = (dict(
929
1633
zip(attribute.func_code.co_freevars,
930
attribute.__closure__))["func"]
1634
attribute.__closure__))
1635
["func"].cell_contents)
1637
nonmethod_func = (dict(
1638
zip(attribute.__code__.co_freevars,
1639
attribute.__closure__))
1640
["func"].cell_contents)
932
1641
# Create a new, but exactly alike, function
933
1642
# object, and decorate it to be a new D-Bus signal
934
1643
# with the alternate D-Bus interface name
935
new_function = (dbus.service.signal
937
attribute._dbus_signature)
939
nonmethod_func.func_code,
940
nonmethod_func.func_globals,
941
nonmethod_func.func_name,
942
nonmethod_func.func_defaults,
943
nonmethod_func.func_closure)))
1644
new_function = copy_function(nonmethod_func)
1645
new_function = (dbus.service.signal(
1647
attribute._dbus_signature)(new_function))
1648
# Copy annotations, if any
1650
new_function._dbus_annotations = dict(
1651
attribute._dbus_annotations)
1652
except AttributeError:
944
1655
# Define a creator of a function to call both the
945
# old and new functions, so both the old and new
946
# signals gets sent when the function is called
1656
# original and alternate functions, so both the
1657
# original and alternate signals gets sent when
1658
# the function is called
947
1659
def fixscope(func1, func2):
948
1660
"""This function is a scope container to pass
949
1661
func1 and func2 to the "call_both" function
950
1662
outside of its arguments"""
1664
@functools.wraps(func2)
951
1665
def call_both(*args, **kwargs):
952
1666
"""This function will emit two D-Bus
953
1667
signals by calling func1 and func2"""
954
1668
func1(*args, **kwargs)
955
1669
func2(*args, **kwargs)
1670
# Make wrapper function look like a D-Bus
1672
for name, attr in inspect.getmembers(func2):
1673
if name.startswith("_dbus_"):
1674
setattr(call_both, name, attr)
956
1676
return call_both
957
1677
# Create the "call_both" function and add it to
959
attr[attrname] = fixscope(attribute,
1679
attr[attrname] = fixscope(attribute, new_function)
961
1680
# Is this a D-Bus method?
962
1681
elif getattr(attribute, "_dbus_is_method", False):
963
1682
# Create a new, but exactly alike, function
964
1683
# object. Decorate it to be a new D-Bus method
965
1684
# with the alternate D-Bus interface name. Add it
967
attr[attrname] = (dbus.service.method
969
attribute._dbus_in_signature,
970
attribute._dbus_out_signature)
972
(attribute.func_code,
973
attribute.func_globals,
975
attribute.func_defaults,
976
attribute.func_closure)))
1687
dbus.service.method(
1689
attribute._dbus_in_signature,
1690
attribute._dbus_out_signature)
1691
(copy_function(attribute)))
1692
# Copy annotations, if any
1694
attr[attrname]._dbus_annotations = dict(
1695
attribute._dbus_annotations)
1696
except AttributeError:
977
1698
# Is this a D-Bus property?
978
1699
elif getattr(attribute, "_dbus_is_property", False):
979
1700
# Create a new, but exactly alike, function
980
1701
# object, and decorate it to be a new D-Bus
981
1702
# property with the alternate D-Bus interface
982
1703
# name. Add it to the class.
983
attr[attrname] = (dbus_service_property
985
attribute._dbus_signature,
986
attribute._dbus_access,
988
._dbus_get_args_options
991
(attribute.func_code,
992
attribute.func_globals,
994
attribute.func_defaults,
995
attribute.func_closure)))
996
return type.__new__(mcs, name, bases, attr)
1704
attr[attrname] = (dbus_service_property(
1705
alt_interface, attribute._dbus_signature,
1706
attribute._dbus_access,
1707
attribute._dbus_get_args_options
1709
(copy_function(attribute)))
1710
# Copy annotations, if any
1712
attr[attrname]._dbus_annotations = dict(
1713
attribute._dbus_annotations)
1714
except AttributeError:
1716
# Is this a D-Bus interface?
1717
elif getattr(attribute, "_dbus_is_interface", False):
1718
# Create a new, but exactly alike, function
1719
# object. Decorate it to be a new D-Bus interface
1720
# with the alternate D-Bus interface name. Add it
1723
dbus_interface_annotations(alt_interface)
1724
(copy_function(attribute)))
1726
# Deprecate all alternate interfaces
1727
iname = "_AlternateDBusNames_interface_annotation{}"
1728
for interface_name in interface_names:
1730
@dbus_interface_annotations(interface_name)
1732
return {"org.freedesktop.DBus.Deprecated":
1734
# Find an unused name
1735
for aname in (iname.format(i)
1736
for i in itertools.count()):
1737
if aname not in attr:
1741
# Replace the class with a new subclass of it with
1742
# methods, signals, etc. as created above.
1743
if sys.version_info.major == 2:
1744
cls = type(b"{}Alternate".format(cls.__name__),
1747
cls = type("{}Alternate".format(cls.__name__),
1754
@alternate_dbus_interfaces({"se.recompile.Mandos":
1755
"se.bsnet.fukt.Mandos"})
999
1756
class ClientDBus(Client, DBusObjectWithProperties):
1000
1757
"""A Client class using D-Bus
1003
1760
dbus_object_path: dbus.ObjectPath
1004
1761
bus: dbus.SystemBus()
1007
1764
runtime_expansions = (Client.runtime_expansions
1008
+ ("dbus_object_path",))
1765
+ ("dbus_object_path", ))
1767
_interface = "se.recompile.Mandos.Client"
1010
1769
# dbus.service.Object doesn't use super(), so we can't either.
1012
def __init__(self, bus = None, *args, **kwargs):
1771
def __init__(self, bus=None, *args, **kwargs):
1014
1773
Client.__init__(self, *args, **kwargs)
1016
self._approvals_pending = 0
1017
1774
# Only now, when this client is initialized, can it show up on
1019
client_object_name = unicode(self.name).translate(
1776
client_object_name = str(self.name).translate(
1020
1777
{ord("."): ord("_"),
1021
1778
ord("-"): ord("_")})
1022
self.dbus_object_path = (dbus.ObjectPath
1023
("/clients/" + client_object_name))
1779
self.dbus_object_path = dbus.ObjectPath(
1780
"/clients/" + client_object_name)
1024
1781
DBusObjectWithProperties.__init__(self, self.bus,
1025
1782
self.dbus_object_path)
1027
def notifychangeproperty(transform_func,
1028
dbus_name, type_func=lambda x: x,
1784
def notifychangeproperty(transform_func, dbus_name,
1785
type_func=lambda x: x,
1787
invalidate_only=False,
1788
_interface=_interface):
1030
1789
""" Modify a variable so that it's a property which announces
1031
1790
its changes to DBus.
1033
1792
transform_fun: Function that takes a value and a variant_level
1034
1793
and transforms it to a D-Bus type.
1035
1794
dbus_name: D-Bus name of the variable
1392
2185
self.start_checker()
1394
2187
self.stop_checker()
1396
2189
# ObjectPath - property
2191
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
2192
"org.freedesktop.DBus.Deprecated": "true"})
1397
2193
@dbus_service_property(_interface, signature="o", access="read")
1398
2194
def ObjectPath_dbus_property(self):
1399
return self.dbus_object_path # is already a dbus.ObjectPath
2195
return self.dbus_object_path # is already a dbus.ObjectPath
1401
2197
# Secret = property
1402
@dbus_service_property(_interface, signature="ay",
1403
access="write", byte_arrays=True)
2199
{"org.freedesktop.DBus.Property.EmitsChangedSignal":
2201
@dbus_service_property(_interface,
1404
2205
def Secret_dbus_property(self, value):
1405
self.secret = str(value)
2206
self.secret = bytes(value)
1410
2211
class ProxyClient(object):
1411
def __init__(self, child_pipe, fpr, address):
2212
def __init__(self, child_pipe, key_id, fpr, address):
1412
2213
self._pipe = child_pipe
1413
self._pipe.send(('init', fpr, address))
2214
self._pipe.send(('init', key_id, fpr, address))
1414
2215
if not self._pipe.recv():
2216
raise KeyError(key_id or fpr)
1417
2218
def __getattribute__(self, name):
1418
if(name == '_pipe'):
1419
2220
return super(ProxyClient, self).__getattribute__(name)
1420
2221
self._pipe.send(('getattr', name))
1421
2222
data = self._pipe.recv()
1422
2223
if data[0] == 'data':
1424
2225
if data[0] == 'function':
1425
2227
def func(*args, **kwargs):
1426
2228
self._pipe.send(('funcall', name, args, kwargs))
1427
2229
return self._pipe.recv()[1]
1430
2233
def __setattr__(self, name, value):
1431
if(name == '_pipe'):
1432
2235
return super(ProxyClient, self).__setattr__(name, value)
1433
2236
self._pipe.send(('setattr', name, value))
1436
class ClientDBusTransitional(ClientDBus):
1437
__metaclass__ = AlternateDBusNamesMetaclass
1440
2239
class ClientHandler(socketserver.BaseRequestHandler, object):
1441
2240
"""A class to handle client connections.
1443
2242
Instantiated once for each connection to handle it.
1444
2243
Note: This will run in its own forked process."""
1446
2245
def handle(self):
1447
2246
with contextlib.closing(self.server.child_pipe) as child_pipe:
1448
2247
logger.info("TCP connection from: %s",
1449
unicode(self.client_address))
2248
str(self.client_address))
1450
2249
logger.debug("Pipe FD: %d",
1451
2250
self.server.child_pipe.fileno())
1453
session = (gnutls.connection
1454
.ClientSession(self.request,
1456
.X509Credentials()))
1458
# Note: gnutls.connection.X509Credentials is really a
1459
# generic GnuTLS certificate credentials object so long as
1460
# no X.509 keys are added to it. Therefore, we can use it
1461
# here despite using OpenPGP certificates.
1463
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1464
# "+AES-256-CBC", "+SHA1",
1465
# "+COMP-NULL", "+CTYPE-OPENPGP",
2252
session = gnutls.ClientSession(self.request)
2254
# priority = ':'.join(("NONE", "+VERS-TLS1.1",
2255
# "+AES-256-CBC", "+SHA1",
2256
# "+COMP-NULL", "+CTYPE-OPENPGP",
1467
2258
# Use a fallback default, since this MUST be set.
1468
2259
priority = self.server.gnutls_priority
1469
2260
if priority is None:
1470
2261
priority = "NORMAL"
1471
(gnutls.library.functions
1472
.gnutls_priority_set_direct(session._c_object,
2262
gnutls.priority_set_direct(session._c_object,
2263
priority.encode("utf-8"),
1475
2266
# Start communication using the Mandos protocol
1476
2267
# Get protocol number
1477
2268
line = self.request.makefile().readline()
1478
2269
logger.debug("Protocol version: %r", line)
1480
2271
if int(line.strip().split()[0]) > 1:
2272
raise RuntimeError(line)
1482
2273
except (ValueError, IndexError, RuntimeError) as error:
1483
2274
logger.error("Unknown protocol version: %s", error)
1486
2277
# Start GnuTLS connection
1488
2279
session.handshake()
1489
except gnutls.errors.GNUTLSError as error:
2280
except gnutls.Error as error:
1490
2281
logger.warning("Handshake failed: %s", error)
1491
2282
# Do not run session.bye() here: the session is not
1492
2283
# established. Just abandon the request.
1494
2285
logger.debug("Handshake succeeded")
1496
2287
approval_required = False
1499
fpr = self.fingerprint(self.peer_certificate
1502
gnutls.errors.GNUTLSError) as error:
1503
logger.warning("Bad certificate: %s", error)
1505
logger.debug("Fingerprint: %s", fpr)
1506
if self.server.use_dbus:
1508
client.NewRequest(str(self.client_address))
1511
client = ProxyClient(child_pipe, fpr,
2289
if gnutls.has_rawpk:
2292
key_id = self.key_id(
2293
self.peer_certificate(session))
2294
except (TypeError, gnutls.Error) as error:
2295
logger.warning("Bad certificate: %s", error)
2297
logger.debug("Key ID: %s", key_id)
2302
fpr = self.fingerprint(
2303
self.peer_certificate(session))
2304
except (TypeError, gnutls.Error) as error:
2305
logger.warning("Bad certificate: %s", error)
2307
logger.debug("Fingerprint: %s", fpr)
2310
client = ProxyClient(child_pipe, key_id, fpr,
1512
2311
self.client_address)
1513
2312
except KeyError:
1516
2315
if client.approval_delay:
1517
2316
delay = client.approval_delay
1518
2317
client.approvals_pending += 1
1519
2318
approval_required = True
1522
2321
if not client.enabled:
1523
2322
logger.info("Client %s is disabled",
1525
2324
if self.server.use_dbus:
1526
2325
# Emit D-Bus signal
1527
2326
client.Rejected("Disabled")
1530
if client._approved or not client.approval_delay:
1531
#We are approved or approval is disabled
2329
if client.approved or not client.approval_delay:
2330
# We are approved or approval is disabled
1533
elif client._approved is None:
2332
elif client.approved is None:
1534
2333
logger.info("Client %s needs approval",
1536
2335
if self.server.use_dbus:
1537
2336
# Emit D-Bus signal
1538
2337
client.NeedApproval(
1539
client.approval_delay_milliseconds(),
1540
client.approved_by_default)
2338
client.approval_delay.total_seconds()
2339
* 1000, client.approved_by_default)
1542
2341
logger.warning("Client %s was not approved",
2047
3057
use_ipv6 = server_settings["use_ipv6"]
2048
3058
stored_state_path = os.path.join(server_settings["statedir"],
2049
3059
stored_state_file)
3060
foreground = server_settings["foreground"]
3061
zeroconf = server_settings["zeroconf"]
2052
initlogger(logging.DEBUG)
3064
initlogger(debug, logging.DEBUG)
2054
3066
if not debuglevel:
2057
3069
level = getattr(logging, debuglevel.upper())
3070
initlogger(debug, level)
2060
3072
if server_settings["servicename"] != "Mandos":
2061
syslogger.setFormatter(logging.Formatter
2062
('Mandos (%s) [%%(process)d]:'
2063
' %%(levelname)s: %%(message)s'
2064
% server_settings["servicename"]))
3073
syslogger.setFormatter(
3074
logging.Formatter('Mandos ({}) [%(process)d]:'
3075
' %(levelname)s: %(message)s'.format(
3076
server_settings["servicename"])))
2066
3078
# Parse config file with clients
2067
client_defaults = { "timeout": "5m",
2068
"extended_timeout": "15m",
2070
"checker": "fping -q -- %%(host)s",
2072
"approval_delay": "0s",
2073
"approval_duration": "1s",
2075
client_config = configparser.SafeConfigParser(client_defaults)
3079
client_config = configparser.SafeConfigParser(Client
2076
3081
client_config.read(os.path.join(server_settings["configdir"],
2077
3082
"clients.conf"))
2079
3084
global mandos_dbus_service
2080
3085
mandos_dbus_service = None
2082
tcp_server = MandosServer((server_settings["address"],
2083
server_settings["port"]),
2085
interface=(server_settings["interface"]
2089
server_settings["priority"],
2092
pidfilename = "/var/run/mandos.pid"
2094
pidfile = open(pidfilename, "w")
2096
logger.error("Could not open file %r", pidfilename)
2099
uid = pwd.getpwnam("_mandos").pw_uid
2100
gid = pwd.getpwnam("_mandos").pw_gid
2103
uid = pwd.getpwnam("mandos").pw_uid
2104
gid = pwd.getpwnam("mandos").pw_gid
3088
if server_settings["socket"] != "":
3089
socketfd = server_settings["socket"]
3090
tcp_server = MandosServer(
3091
(server_settings["address"], server_settings["port"]),
3093
interface=(server_settings["interface"] or None),
3095
gnutls_priority=server_settings["priority"],
3099
pidfilename = "/run/mandos.pid"
3100
if not os.path.isdir("/run/."):
3101
pidfilename = "/var/run/mandos.pid"
3104
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
3105
except IOError as e:
3106
logger.error("Could not open file %r", pidfilename,
3109
for name, group in (("_mandos", "_mandos"),
3110
("mandos", "mandos"),
3111
("nobody", "nogroup")):
3113
uid = pwd.getpwnam(name).pw_uid
3114
gid = pwd.getpwnam(group).pw_gid
2105
3116
except KeyError:
2107
uid = pwd.getpwnam("nobody").pw_uid
2108
gid = pwd.getpwnam("nobody").pw_gid
3125
logger.debug("Did setuid/setgid to {}:{}".format(uid,
2115
3127
except OSError as error:
2116
if error[0] != errno.EPERM:
3128
logger.warning("Failed to setuid/setgid to {}:{}: {}"
3129
.format(uid, gid, os.strerror(error.errno)))
3130
if error.errno != errno.EPERM:
2120
3134
# Enable all possible GnuTLS debugging
2122
3136
# "Use a log level over 10 to enable all debugging options."
2123
3137
# - GnuTLS manual
2124
gnutls.library.functions.gnutls_global_set_log_level(11)
2126
@gnutls.library.types.gnutls_log_func
3138
gnutls.global_set_log_level(11)
2127
3141
def debug_gnutls(level, string):
2128
3142
logger.debug("GnuTLS: %s", string[:-1])
2130
(gnutls.library.functions
2131
.gnutls_global_set_log_function(debug_gnutls))
3144
gnutls.global_set_log_function(debug_gnutls)
2133
3146
# Redirect stdin so all checkers get /dev/null
2134
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
3147
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2135
3148
os.dup2(null, sys.stdin.fileno())
2139
# No console logging
2140
logger.removeHandler(console)
2142
3152
# Need to fork before connecting to D-Bus
2144
3154
# Close all input and output, do double fork, etc.
3157
# multiprocessing will use threads, so before we use GLib we need
3158
# to inform GLib that threads will be used.
2147
3161
global main_loop
2148
3162
# From the Avahi example code
2149
DBusGMainLoop(set_as_default=True )
2150
main_loop = gobject.MainLoop()
3163
DBusGMainLoop(set_as_default=True)
3164
main_loop = GLib.MainLoop()
2151
3165
bus = dbus.SystemBus()
2152
3166
# End of Avahi example code
2155
3169
bus_name = dbus.service.BusName("se.recompile.Mandos",
2156
bus, do_not_queue=True)
2157
old_bus_name = (dbus.service.BusName
2158
("se.bsnet.fukt.Mandos", bus,
2160
except dbus.exceptions.NameExistsException as e:
2161
logger.error(unicode(e) + ", disabling D-Bus")
3172
old_bus_name = dbus.service.BusName(
3173
"se.bsnet.fukt.Mandos", bus,
3175
except dbus.exceptions.DBusException as e:
3176
logger.error("Disabling D-Bus:", exc_info=e)
2162
3177
use_dbus = False
2163
3178
server_settings["use_dbus"] = False
2164
3179
tcp_server.use_dbus = False
2165
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2166
service = AvahiServiceToSyslog(name =
2167
server_settings["servicename"],
2168
servicetype = "_mandos._tcp",
2169
protocol = protocol, bus = bus)
2170
if server_settings["interface"]:
2171
service.interface = (if_nametoindex
2172
(str(server_settings["interface"])))
3181
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3182
service = AvahiServiceToSyslog(
3183
name=server_settings["servicename"],
3184
servicetype="_mandos._tcp",
3187
if server_settings["interface"]:
3188
service.interface = if_nametoindex(
3189
server_settings["interface"].encode("utf-8"))
2174
3191
global multiprocessing_manager
2175
3192
multiprocessing_manager = multiprocessing.Manager()
2177
3194
client_class = Client
2179
client_class = functools.partial(ClientDBusTransitional,
2182
special_settings = {
2183
# Some settings need to be accessd by special methods;
2184
# booleans need .getboolean(), etc. Here is a list of them:
2185
"approved_by_default":
2187
client_config.getboolean(section, "approved_by_default"),
2190
client_config.getboolean(section, "enabled"),
2192
# Construct a new dict of client settings of this form:
2193
# { client_name: {setting_name: value, ...}, ...}
2194
# with exceptions for any special settings as defined above
2195
client_settings = dict((clientname,
2198
if setting not in special_settings
2199
else special_settings[setting]
2201
for setting, value in
2202
client_config.items(clientname)))
2203
for clientname in client_config.sections())
3196
client_class = functools.partial(ClientDBus, bus=bus)
3198
client_settings = Client.config_parser(client_config)
2205
3199
old_client_settings = {}
3202
# This is used to redirect stdout and stderr for checker processes
3204
wnull = open(os.devnull, "w") # A writable /dev/null
3205
# Only used if server is running in foreground but not in debug
3207
if debug or not foreground:
2208
3210
# Get client data and settings from last running state.
2209
3211
if server_settings["restore"]:
2211
3213
with open(stored_state_path, "rb") as stored_state:
2212
clients_data, old_client_settings = (pickle.load
3214
if sys.version_info.major == 2:
3215
clients_data, old_client_settings = pickle.load(
3218
bytes_clients_data, bytes_old_client_settings = (
3219
pickle.load(stored_state, encoding="bytes"))
3220
# Fix bytes to strings
3223
clients_data = {(key.decode("utf-8")
3224
if isinstance(key, bytes)
3227
bytes_clients_data.items()}
3228
del bytes_clients_data
3229
for key in clients_data:
3230
value = {(k.decode("utf-8")
3231
if isinstance(k, bytes) else k): v
3233
clients_data[key].items()}
3234
clients_data[key] = value
3236
value["client_structure"] = [
3238
if isinstance(s, bytes)
3240
value["client_structure"]]
3242
for k in ("name", "host"):
3243
if isinstance(value[k], bytes):
3244
value[k] = value[k].decode("utf-8")
3245
if not value.has_key("key_id"):
3246
value["key_id"] = ""
3247
elif not value.has_key("fingerprint"):
3248
value["fingerprint"] = ""
3249
# old_client_settings
3251
old_client_settings = {
3252
(key.decode("utf-8")
3253
if isinstance(key, bytes)
3256
bytes_old_client_settings.items()}
3257
del bytes_old_client_settings
3259
for value in old_client_settings.values():
3260
if isinstance(value["host"], bytes):
3261
value["host"] = (value["host"]
2214
3263
os.remove(stored_state_path)
2215
3264
except IOError as e:
2216
logger.warning("Could not load persistent state: {0}"
2218
if e.errno != errno.ENOENT:
3265
if e.errno == errno.ENOENT:
3266
logger.warning("Could not load persistent state:"
3267
" {}".format(os.strerror(e.errno)))
3269
logger.critical("Could not load persistent state:",
3272
except EOFError as e:
3273
logger.warning("Could not load persistent state: "
2221
3277
with PGPEngine() as pgp:
2222
for client in clients_data:
2223
client_name = client["name"]
3278
for client_name, client in clients_data.items():
3279
# Skip removed clients
3280
if client_name not in client_settings:
2225
3283
# Decide which value to use after restoring saved state.
2226
3284
# We have three different values: Old config file,
2227
3285
# new config file, and saved state.
2232
3290
# For each value in new config, check if it
2233
3291
# differs from the old config value (Except for
2234
3292
# the "secret" attribute)
2235
if (name != "secret" and
2236
value != old_client_settings[client_name]
2238
setattr(client, name, value)
3293
if (name != "secret"
3295
old_client_settings[client_name][name])):
3296
client[name] = value
2239
3297
except KeyError:
2242
3300
# Clients who has passed its expire date can still be
2243
# enabled if its last checker was sucessful. Clients
2244
# whose checker failed before we stored its state is
2245
# assumed to have failed all checkers during downtime.
2246
if client["enabled"] and client["last_checked_ok"]:
2247
if ((datetime.datetime.utcnow()
2248
- client["last_checked_ok"])
2249
> client["interval"]):
2250
if client["last_checker_status"] != 0:
3301
# enabled if its last checker was successful. A Client
3302
# whose checker succeeded before we stored its state is
3303
# assumed to have successfully run all checkers during
3305
if client["enabled"]:
3306
if datetime.datetime.utcnow() >= client["expires"]:
3307
if not client["last_checked_ok"]:
3309
"disabling client {} - Client never "
3310
"performed a successful checker".format(
3312
client["enabled"] = False
3313
elif client["last_checker_status"] != 0:
3315
"disabling client {} - Client last"
3316
" checker failed with error code"
3319
client["last_checker_status"]))
2251
3320
client["enabled"] = False
2253
client["expires"] = (datetime.datetime
2255
+ client["timeout"])
2257
client["changedstate"] = (multiprocessing_manager
2259
(multiprocessing_manager
2262
new_client = (ClientDBusTransitional.__new__
2263
(ClientDBusTransitional))
2264
tcp_server.clients[client_name] = new_client
2265
new_client.bus = bus
2266
for name, value in client.iteritems():
2267
setattr(new_client, name, value)
2268
client_object_name = unicode(client_name).translate(
2269
{ord("."): ord("_"),
2270
ord("-"): ord("_")})
2271
new_client.dbus_object_path = (dbus.ObjectPath
2273
+ client_object_name))
2274
DBusObjectWithProperties.__init__(new_client,
2279
tcp_server.clients[client_name] = (Client.__new__
2281
for name, value in client.iteritems():
2282
setattr(tcp_server.clients[client_name],
3322
client["expires"] = (
3323
datetime.datetime.utcnow()
3324
+ client["timeout"])
3325
logger.debug("Last checker succeeded,"
3326
" keeping {} enabled".format(
2286
tcp_server.clients[client_name].secret = (
2287
pgp.decrypt(tcp_server.clients[client_name]
2289
client_settings[client_name]
3329
client["secret"] = pgp.decrypt(
3330
client["encrypted_secret"],
3331
client_settings[client_name]["secret"])
2291
3332
except PGPError:
2292
3333
# If decryption fails, we use secret from new settings
2293
tcp_server.clients[client_name].secret = (
2294
client_settings[client_name]["secret"])
2296
# Create/remove clients based on new changes made to config
2297
for clientname in set(old_client_settings) - set(client_settings):
2298
del tcp_server.clients[clientname]
2299
for clientname in set(client_settings) - set(old_client_settings):
2300
tcp_server.clients[clientname] = (client_class(name
3334
logger.debug("Failed to decrypt {} old secret".format(
3336
client["secret"] = (client_settings[client_name]
3339
# Add/remove clients based on new changes made to config
3340
for client_name in (set(old_client_settings)
3341
- set(client_settings)):
3342
del clients_data[client_name]
3343
for client_name in (set(client_settings)
3344
- set(old_client_settings)):
3345
clients_data[client_name] = client_settings[client_name]
3347
# Create all client objects
3348
for client_name, client in clients_data.items():
3349
tcp_server.clients[client_name] = client_class(
3352
server_settings=server_settings)
2306
3354
if not tcp_server.clients:
2307
3355
logger.warning("No clients defined")
2313
pidfile.write(str(pid) + "\n".encode("utf-8"))
2316
logger.error("Could not write to file %r with PID %d",
2319
# "pidfile" was never created
3358
if pidfile is not None:
3362
print(pid, file=pidfile)
3364
logger.error("Could not write to file %r with PID %d",
2321
3367
del pidfilename
2323
signal.signal(signal.SIGINT, signal.SIG_IGN)
2325
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2326
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
3369
for termsig in (signal.SIGHUP, signal.SIGTERM):
3370
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3371
lambda: main_loop.quit() and False)
2329
class MandosDBusService(dbus.service.Object):
3375
@alternate_dbus_interfaces(
3376
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3377
class MandosDBusService(DBusObjectWithObjectManager):
2330
3378
"""A D-Bus proxy object"""
2331
3380
def __init__(self):
2332
3381
dbus.service.Object.__init__(self, bus, "/")
2333
3383
_interface = "se.recompile.Mandos"
2335
3385
@dbus.service.signal(_interface, signature="o")
2336
3386
def ClientAdded(self, objpath):
2340
3390
@dbus.service.signal(_interface, signature="ss")
2341
def ClientNotFound(self, fingerprint, address):
3391
def ClientNotFound(self, key_id, address):
3395
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
2345
3397
@dbus.service.signal(_interface, signature="os")
2346
3398
def ClientRemoved(self, objpath, name):
3402
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
2350
3404
@dbus.service.method(_interface, out_signature="ao")
2351
3405
def GetAllClients(self):
2353
return dbus.Array(c.dbus_object_path
2355
tcp_server.clients.itervalues())
3407
return dbus.Array(c.dbus_object_path for c in
3408
tcp_server.clients.values())
3410
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
2357
3412
@dbus.service.method(_interface,
2358
3413
out_signature="a{oa{sv}}")
2359
3414
def GetAllClientsWithProperties(self):
2361
3416
return dbus.Dictionary(
2362
((c.dbus_object_path, c.GetAll(""))
2363
for c in tcp_server.clients.itervalues()),
3417
{c.dbus_object_path: c.GetAll(
3418
"se.recompile.Mandos.Client")
3419
for c in tcp_server.clients.values()},
2364
3420
signature="oa{sv}")
2366
3422
@dbus.service.method(_interface, in_signature="o")
2367
3423
def RemoveClient(self, object_path):
2369
for c in tcp_server.clients.itervalues():
3425
for c in tcp_server.clients.values():
2370
3426
if c.dbus_object_path == object_path:
2371
3427
del tcp_server.clients[c.name]
2372
3428
c.remove_from_connection()
2373
# Don't signal anything except ClientRemoved
3429
# Don't signal the disabling
2374
3430
c.disable(quiet=True)
2376
self.ClientRemoved(object_path, c.name)
3431
# Emit D-Bus signal for removal
3432
self.client_removed_signal(c)
2378
3434
raise KeyError(object_path)
2382
class MandosDBusServiceTransitional(MandosDBusService):
2383
__metaclass__ = AlternateDBusNamesMetaclass
2384
mandos_dbus_service = MandosDBusServiceTransitional()
3438
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3439
out_signature="a{oa{sa{sv}}}")
3440
def GetManagedObjects(self):
3442
return dbus.Dictionary(
3443
{client.dbus_object_path:
3445
{interface: client.GetAll(interface)
3447
client._get_all_interface_names()})
3448
for client in tcp_server.clients.values()})
3450
def client_added_signal(self, client):
3451
"""Send the new standard signal and the old signal"""
3453
# New standard signal
3454
self.InterfacesAdded(
3455
client.dbus_object_path,
3457
{interface: client.GetAll(interface)
3459
client._get_all_interface_names()}))
3461
self.ClientAdded(client.dbus_object_path)
3463
def client_removed_signal(self, client):
3464
"""Send the new standard signal and the old signal"""
3466
# New standard signal
3467
self.InterfacesRemoved(
3468
client.dbus_object_path,
3469
client._get_all_interface_names())
3471
self.ClientRemoved(client.dbus_object_path,
3474
mandos_dbus_service = MandosDBusService()
3476
# Save modules to variables to exempt the modules from being
3477
# unloaded before the function registered with atexit() is run.
3478
mp = multiprocessing
2387
3482
"Cleanup function; run on exit"
2390
multiprocessing.active_children()
3486
mp.active_children()
2391
3488
if not (tcp_server.clients or client_settings):
2394
3491
# Store client before exiting. Secrets are encrypted with key
2395
3492
# based on what config file has. If config file is
2396
3493
# removed/edited, old secret will thus be unrecovable.
2398
3495
with PGPEngine() as pgp:
2399
for client in tcp_server.clients.itervalues():
3496
for client in tcp_server.clients.values():
2400
3497
key = client_settings[client.name]["secret"]
2401
3498
client.encrypted_secret = pgp.encrypt(client.secret,
2403
3500
client_dict = {}
2405
# A list of attributes that will not be stored when
2407
exclude = set(("bus", "changedstate", "secret"))
2408
for name, typ in (inspect.getmembers
2409
(dbus.service.Object)):
3502
# A list of attributes that can not be pickled
3504
exclude = {"bus", "changedstate", "secret",
3505
"checker", "server_settings"}
3506
for name, typ in inspect.getmembers(dbus.service
2410
3508
exclude.add(name)
2412
3510
client_dict["encrypted_secret"] = (client
2413
3511
.encrypted_secret)
2414
3512
for attr in client.client_structure:
2415
3513
if attr not in exclude:
2416
3514
client_dict[attr] = getattr(client, attr)
2418
clients.append(client_dict)
3516
clients[client.name] = client_dict
2419
3517
del client_settings[client.name]["secret"]
2422
with os.fdopen(os.open(stored_state_path,
2423
os.O_CREAT|os.O_WRONLY|os.O_TRUNC,
2424
0600), "wb") as stored_state:
2425
pickle.dump((clients, client_settings), stored_state)
3520
with tempfile.NamedTemporaryFile(
3524
dir=os.path.dirname(stored_state_path),
3525
delete=False) as stored_state:
3526
pickle.dump((clients, client_settings), stored_state,
3528
tempname = stored_state.name
3529
os.rename(tempname, stored_state_path)
2426
3530
except (IOError, OSError) as e:
2427
logger.warning("Could not save persistent state: {0}"
2429
if e.errno not in (errno.ENOENT, errno.EACCES):
3536
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
3537
logger.warning("Could not save persistent state: {}"
3538
.format(os.strerror(e.errno)))
3540
logger.warning("Could not save persistent state:",
2432
3544
# Delete all clients, and settings from config
2433
3545
while tcp_server.clients:
2434
3546
name, client = tcp_server.clients.popitem()
2436
3548
client.remove_from_connection()
2437
# Don't signal anything except ClientRemoved
3549
# Don't signal the disabling
2438
3550
client.disable(quiet=True)
3551
# Emit D-Bus signal for removal
2441
mandos_dbus_service.ClientRemoved(client
3553
mandos_dbus_service.client_removed_signal(client)
2444
3554
client_settings.clear()
2446
3556
atexit.register(cleanup)
2448
for client in tcp_server.clients.itervalues():
3558
for client in tcp_server.clients.values():
2451
mandos_dbus_service.ClientAdded(client.dbus_object_path)
3560
# Emit D-Bus signal for adding
3561
mandos_dbus_service.client_added_signal(client)
2452
3562
# Need to initiate checking of clients
2453
3563
if client.enabled:
2454
3564
client.init_checker()
2456
3566
tcp_server.enable()
2457
3567
tcp_server.server_activate()
2459
3569
# Find out what port we got
2460
service.port = tcp_server.socket.getsockname()[1]
3571
service.port = tcp_server.socket.getsockname()[1]
2462
3573
logger.info("Now listening on address %r, port %d,"
2463
" flowinfo %d, scope_id %d"
2464
% tcp_server.socket.getsockname())
3574
" flowinfo %d, scope_id %d",
3575
*tcp_server.socket.getsockname())
2466
logger.info("Now listening on address %r, port %d"
2467
% tcp_server.socket.getsockname())
2469
#service.interface = tcp_server.socket.getsockname()[3]
3577
logger.info("Now listening on address %r, port %d",
3578
*tcp_server.socket.getsockname())
3580
# service.interface = tcp_server.socket.getsockname()[3]
2472
# From the Avahi example code
2475
except dbus.exceptions.DBusException as error:
2476
logger.critical("DBusException: %s", error)
2479
# End of Avahi example code
2481
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2482
lambda *args, **kwargs:
2483
(tcp_server.handle_request
2484
(*args[2:], **kwargs) or True))
3584
# From the Avahi example code
3587
except dbus.exceptions.DBusException as error:
3588
logger.critical("D-Bus Exception", exc_info=error)
3591
# End of Avahi example code
3593
GLib.io_add_watch(tcp_server.fileno(), GLib.IO_IN,
3594
lambda *args, **kwargs:
3595
(tcp_server.handle_request
3596
(*args[2:], **kwargs) or True))
2486
3598
logger.debug("Starting main loop")
2487
3599
main_loop.run()
2488
3600
except AvahiError as error:
2489
logger.critical("AvahiError: %s", error)
3601
logger.critical("Avahi Error", exc_info=error)
2492
3604
except KeyboardInterrupt: