488
364
follow_name_owner_changes=True),
489
365
avahi.DBUS_INTERFACE_SERVER)
490
366
self.server.connect_to_signal("StateChanged",
491
self.server_state_changed)
367
self.server_state_changed)
492
368
self.server_state_changed(self.server.GetState())
495
370
class AvahiServiceToSyslog(AvahiService):
496
def rename(self, *args, **kwargs):
497
372
"""Add the new name to the syslog messages"""
498
ret = super(AvahiServiceToSyslog, self).rename(*args, **kwargs)
499
syslogger.setFormatter(logging.Formatter(
500
'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'
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))
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))
817
386
class Client(object):
818
387
"""A representation of a client host served by this server.
821
approved: bool(); 'None' if not yet approved/disapproved
390
_approved: bool(); 'None' if not yet approved/disapproved
822
391
approval_delay: datetime.timedelta(); Time to wait for approval
823
392
approval_duration: datetime.timedelta(); Duration of one approval
824
393
checker: subprocess.Popen(); a running checker process used
825
394
to see if the client lives.
826
395
'None' if no process is running.
827
checker_callback_tag: a GLib event source tag, or None
396
checker_callback_tag: a gobject event source tag, or None
828
397
checker_command: string; External command which is run to check
829
398
if client lives. %() expansions are done at
830
399
runtime with vars(self) as dict, so that for
831
400
instance %(name)s can be used in the command.
832
checker_initiator_tag: a GLib event source tag, or None
401
checker_initiator_tag: a gobject event source tag, or None
833
402
created: datetime.datetime(); (UTC) object creation
834
403
client_structure: Object describing what attributes a client has
835
404
and is used for storing the client at exit
836
405
current_checker_command: string; current running checker_command
837
disable_initiator_tag: a GLib event source tag, or None
406
disable_initiator_tag: a gobject event source tag, or None
839
408
fingerprint: string (40 or 32 hexadecimal digits); used to
840
uniquely identify an OpenPGP client
841
key_id: string (64 hexadecimal digits); used to uniquely identify
842
a client using raw public keys
409
uniquely identify the client
843
410
host: string; available for use by the checker command
844
411
interval: datetime.timedelta(); How often to start a new checker
845
412
last_approval_request: datetime.datetime(); (UTC) or None
846
413
last_checked_ok: datetime.datetime(); (UTC) or None
847
415
last_checker_status: integer between 0 and 255 reflecting exit
848
416
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
852
last_enabled: datetime.datetime(); (UTC) or None
418
last_enabled: datetime.datetime(); (UTC)
853
419
name: string; from the config file, used in log messages and
854
420
D-Bus identifiers
855
421
secret: bytestring; sent verbatim (over TLS) to client
856
422
timeout: datetime.timedelta(); How long from last_checked_ok
857
423
until this client is disabled
858
extended_timeout: extra long timeout when secret has been sent
424
extended_timeout: extra long timeout when password has been sent
859
425
runtime_expansions: Allowed attributes for runtime expansion.
860
426
expires: datetime.datetime(); time (UTC) when a client will be
861
427
disabled, or None
862
server_settings: The server_settings dict from main()
865
430
runtime_expansions = ("approval_delay", "approval_duration",
866
"created", "enabled", "expires", "key_id",
867
"fingerprint", "host", "interval",
868
"last_approval_request", "last_checked_ok",
431
"created", "enabled", "fingerprint",
432
"host", "interval", "last_checked_ok",
869
433
"last_enabled", "name", "timeout")
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):
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'
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
955
457
logger.debug("Creating client %r", self.name)
956
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()
957
463
logger.debug(" Fingerprint: %s", self.fingerprint)
958
self.created = settings.get("created",
959
datetime.datetime.utcnow())
961
# 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"])
962
485
self.checker = None
963
486
self.checker_initiator_tag = None
964
487
self.disable_initiator_tag = None
488
self.expires = datetime.datetime.utcnow() + self.timeout
965
489
self.checker_callback_tag = None
490
self.checker_command = config["checker"]
966
491
self.current_checker_command = None
492
self._approved = None
493
self.approved_by_default = config.get("approved_by_default",
968
495
self.approvals_pending = 0
969
self.changedstate = multiprocessing_manager.Condition(
970
multiprocessing_manager.Lock())
971
self.client_structure = [attr
972
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()
973
505
if not attr.startswith("_")]
974
506
self.client_structure.append("client_structure")
976
for name, t in inspect.getmembers(
977
type(self), lambda obj: isinstance(obj, property)):
508
for name, t in inspect.getmembers(type(self),
978
512
if not name.startswith("_"):
979
513
self.client_structure.append(name)
981
515
# Send notice to process children that client state has changed
982
516
def send_changedstate(self):
983
517
with self.changedstate:
984
518
self.changedstate.notify_all()
986
520
def enable(self):
987
521
"""Start this client's checker and timeout hooks"""
988
522
if getattr(self, "enabled", False):
989
523
# Already enabled
525
self.send_changedstate()
991
526
self.expires = datetime.datetime.utcnow() + self.timeout
992
527
self.enabled = True
993
528
self.last_enabled = datetime.datetime.utcnow()
994
529
self.init_checker()
995
self.send_changedstate()
997
531
def disable(self, quiet=True):
998
532
"""Disable this client."""
999
533
if not getattr(self, "enabled", False):
536
self.send_changedstate()
1002
538
logger.info("Disabling client %s", self.name)
1003
if getattr(self, "disable_initiator_tag", None) is not None:
1004
GLib.source_remove(self.disable_initiator_tag)
539
if getattr(self, "disable_initiator_tag", False):
540
gobject.source_remove(self.disable_initiator_tag)
1005
541
self.disable_initiator_tag = None
1006
542
self.expires = None
1007
if getattr(self, "checker_initiator_tag", None) is not None:
1008
GLib.source_remove(self.checker_initiator_tag)
543
if getattr(self, "checker_initiator_tag", False):
544
gobject.source_remove(self.checker_initiator_tag)
1009
545
self.checker_initiator_tag = None
1010
546
self.stop_checker()
1011
547
self.enabled = False
1013
self.send_changedstate()
1014
# 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
1017
551
def __del__(self):
1020
554
def init_checker(self):
1021
555
# Schedule a new checker to be started an 'interval' from now,
1022
556
# and every interval from then on.
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),
557
self.checker_initiator_tag = (gobject.timeout_add
558
(self.interval_milliseconds(),
1028
560
# Schedule a disable() when 'timeout' has passed
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)
561
self.disable_initiator_tag = (gobject.timeout_add
562
(self.timeout_milliseconds(),
1033
564
# Also start a new checker *right now*.
1034
565
self.start_checker()
1036
def checker_callback(self, source, condition, connection,
567
def checker_callback(self, pid, condition, command):
1038
568
"""The checker has completed, so take appropriate actions."""
1039
569
self.checker_callback_tag = None
1040
570
self.checker = None
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
571
if os.WIFEXITED(condition):
572
self.last_checker_status = os.WEXITSTATUS(condition)
1048
573
if self.last_checker_status == 0:
1049
574
logger.info("Checker for %(name)s succeeded",
1051
576
self.checked_ok()
1053
logger.info("Checker for %(name)s failed", vars(self))
578
logger.info("Checker for %(name)s failed",
1055
581
self.last_checker_status = -1
1056
self.last_checker_signal = -returncode
1057
582
logger.warning("Checker for %(name)s crashed?",
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."""
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,
1070
591
if timeout is None:
1071
592
timeout = self.timeout
593
self.last_checked_ok = datetime.datetime.utcnow()
1072
594
if self.disable_initiator_tag is not None:
1073
GLib.source_remove(self.disable_initiator_tag)
1074
self.disable_initiator_tag = None
595
gobject.source_remove(self.disable_initiator_tag)
1075
596
if getattr(self, "enabled", False):
1076
self.disable_initiator_tag = GLib.timeout_add(
1077
int(timeout.total_seconds() * 1000), self.disable)
597
self.disable_initiator_tag = (gobject.timeout_add
598
(_timedelta_to_milliseconds
599
(timeout), self.disable))
1078
600
self.expires = datetime.datetime.utcnow() + timeout
1080
602
def need_approval(self):
1081
603
self.last_approval_request = datetime.datetime.utcnow()
1083
605
def start_checker(self):
1084
606
"""Start a new checker subprocess if one is not running.
1086
608
If a checker already exists, leave it running and do
1088
610
# The reason for not killing a running checker is that if we
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
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
1093
615
# checkers alone, the checker would have to take more time
1094
616
# than 'timeout' for the client to be disabled, which is as it
1097
if self.checker is not None and not self.checker.is_alive():
1098
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)
1101
632
# Start a new checker if needed
1102
633
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}
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
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
1114
653
self.current_checker_command = command
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
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
1143
680
def stop_checker(self):
1144
681
"""Force the checker process, if any, to stop."""
1145
682
if self.checker_callback_tag:
1146
GLib.source_remove(self.checker_callback_tag)
683
gobject.source_remove(self.checker_callback_tag)
1147
684
self.checker_callback_tag = None
1148
685
if getattr(self, "checker", None) is None:
1150
687
logger.debug("Stopping checker for %(name)s", vars(self))
1151
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
1152
696
self.checker = None
1155
def dbus_service_property(dbus_interface,
699
def dbus_service_property(dbus_interface, signature="v",
700
access="readwrite", byte_arrays=False):
1159
701
"""Decorators for marking methods of a DBusObjectWithProperties to
1160
702
become properties on the D-Bus.
1162
704
The decorated method will be called with no arguments by "Get"
1163
705
and with one argument by "Set".
1165
707
The parameters, where they are supported, are the same as
1166
708
dbus.service.method, except there is only "signature", since the
1167
709
type from Get() and the type sent to Set() is the same.
1500
879
except (AttributeError, xml.dom.DOMException,
1501
880
xml.parsers.expat.ExpatError) as error:
1502
881
logger.error("Failed to override Introspection method",
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):
886
def datetime_to_dbus (dt, variant_level=0):
1579
887
"""Convert a UTC datetime.datetime() to a D-Bus type."""
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).
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.
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):
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):
1616
906
# Ignore non-D-Bus attributes, and D-Bus attributes
1617
907
# with the wrong interface name
1618
908
if (not hasattr(attribute, "_dbus_interface")
1619
or not attribute._dbus_interface.startswith(
1620
orig_interface_name)):
909
or not attribute._dbus_interface
910
.startswith("se.recompile.Mandos")):
1622
912
# Create an alternate D-Bus interface name based on
1623
913
# the current name
1624
alt_interface = attribute._dbus_interface.replace(
1625
orig_interface_name, alt_interface_name)
1626
interface_names.add(alt_interface)
914
alt_interface = (attribute._dbus_interface
915
.replace("se.recompile.Mandos",
916
"se.bsnet.fukt.Mandos"))
1627
917
# Is this a D-Bus signal?
1628
918
if getattr(attribute, "_dbus_is_signal", False):
1629
# Extract the original non-method undecorated
1630
# function by black magic
1631
if sys.version_info.major == 2:
1632
nonmethod_func = (dict(
919
# Extract the original non-method function by
921
nonmethod_func = (dict(
1633
922
zip(attribute.func_code.co_freevars,
1634
attribute.__closure__))
1635
["func"].cell_contents)
1637
nonmethod_func = (dict(
1638
zip(attribute.__code__.co_freevars,
1639
attribute.__closure__))
1640
["func"].cell_contents)
923
attribute.__closure__))["func"]
1641
925
# Create a new, but exactly alike, function
1642
926
# object, and decorate it to be a new D-Bus signal
1643
927
# with the alternate D-Bus interface name
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:
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)))
1655
937
# Define a creator of a function to call both the
1656
# original and alternate functions, so both the
1657
# original and alternate signals gets sent when
1658
# the function is called
938
# old and new functions, so both the old and new
939
# signals gets sent when the function is called
1659
940
def fixscope(func1, func2):
1660
941
"""This function is a scope container to pass
1661
942
func1 and func2 to the "call_both" function
1662
943
outside of its arguments"""
1664
@functools.wraps(func2)
1665
944
def call_both(*args, **kwargs):
1666
945
"""This function will emit two D-Bus
1667
946
signals by calling func1 and func2"""
1668
947
func1(*args, **kwargs)
1669
948
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)
1676
949
return call_both
1677
950
# Create the "call_both" function and add it to
1679
attr[attrname] = fixscope(attribute, new_function)
952
attr[attrname] = fixscope(attribute,
1680
954
# Is this a D-Bus method?
1681
955
elif getattr(attribute, "_dbus_is_method", False):
1682
956
# Create a new, but exactly alike, function
1683
957
# object. Decorate it to be a new D-Bus method
1684
958
# with the alternate D-Bus interface name. Add it
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:
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)))
1698
970
# Is this a D-Bus property?
1699
971
elif getattr(attribute, "_dbus_is_property", False):
1700
972
# Create a new, but exactly alike, function
1701
973
# object, and decorate it to be a new D-Bus
1702
974
# property with the alternate D-Bus interface
1703
975
# name. Add it to the class.
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"})
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)
1756
992
class ClientDBus(Client, DBusObjectWithProperties):
1757
993
"""A Client class using D-Bus
1760
996
dbus_object_path: dbus.ObjectPath
1761
997
bus: dbus.SystemBus()
1764
1000
runtime_expansions = (Client.runtime_expansions
1765
+ ("dbus_object_path", ))
1767
_interface = "se.recompile.Mandos.Client"
1001
+ ("dbus_object_path",))
1769
1003
# dbus.service.Object doesn't use super(), so we can't either.
1771
def __init__(self, bus=None, *args, **kwargs):
1005
def __init__(self, bus = None, *args, **kwargs):
1773
1007
Client.__init__(self, *args, **kwargs)
1009
self._approvals_pending = 0
1774
1010
# Only now, when this client is initialized, can it show up on
1776
client_object_name = str(self.name).translate(
1012
client_object_name = unicode(self.name).translate(
1777
1013
{ord("."): ord("_"),
1778
1014
ord("-"): ord("_")})
1779
self.dbus_object_path = dbus.ObjectPath(
1780
"/clients/" + client_object_name)
1015
self.dbus_object_path = (dbus.ObjectPath
1016
("/clients/" + client_object_name))
1781
1017
DBusObjectWithProperties.__init__(self, self.bus,
1782
1018
self.dbus_object_path)
1784
def notifychangeproperty(transform_func, dbus_name,
1785
type_func=lambda x: x,
1787
invalidate_only=False,
1788
_interface=_interface):
1020
def notifychangeproperty(transform_func,
1021
dbus_name, type_func=lambda x: x,
1789
1023
""" Modify a variable so that it's a property which announces
1790
1024
its changes to DBus.
1792
1026
transform_fun: Function that takes a value and a variant_level
1793
1027
and transforms it to a D-Bus type.
1794
1028
dbus_name: D-Bus name of the variable
2185
1384
self.start_checker()
2187
1386
self.stop_checker()
2189
1388
# ObjectPath - property
2191
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
2192
"org.freedesktop.DBus.Deprecated": "true"})
2193
1389
@dbus_service_property(_interface, signature="o", access="read")
2194
1390
def ObjectPath_dbus_property(self):
2195
return self.dbus_object_path # is already a dbus.ObjectPath
1391
return self.dbus_object_path # is already a dbus.ObjectPath
2197
1393
# Secret = property
2199
{"org.freedesktop.DBus.Property.EmitsChangedSignal":
2201
@dbus_service_property(_interface,
1394
@dbus_service_property(_interface, signature="ay",
1395
access="write", byte_arrays=True)
2205
1396
def Secret_dbus_property(self, value):
2206
self.secret = bytes(value)
1397
self.secret = str(value)
2211
1402
class ProxyClient(object):
2212
def __init__(self, child_pipe, key_id, fpr, address):
1403
def __init__(self, child_pipe, fpr, address):
2213
1404
self._pipe = child_pipe
2214
self._pipe.send(('init', key_id, fpr, address))
1405
self._pipe.send(('init', fpr, address))
2215
1406
if not self._pipe.recv():
2216
raise KeyError(key_id or fpr)
2218
1409
def __getattribute__(self, name):
1410
if(name == '_pipe'):
2220
1411
return super(ProxyClient, self).__getattribute__(name)
2221
1412
self._pipe.send(('getattr', name))
2222
1413
data = self._pipe.recv()
2223
1414
if data[0] == 'data':
2225
1416
if data[0] == 'function':
2227
1417
def func(*args, **kwargs):
2228
1418
self._pipe.send(('funcall', name, args, kwargs))
2229
1419
return self._pipe.recv()[1]
2233
1422
def __setattr__(self, name, value):
1423
if(name == '_pipe'):
2235
1424
return super(ProxyClient, self).__setattr__(name, value)
2236
1425
self._pipe.send(('setattr', name, value))
1428
class ClientDBusTransitional(ClientDBus):
1429
__metaclass__ = AlternateDBusNamesMetaclass
2239
1432
class ClientHandler(socketserver.BaseRequestHandler, object):
2240
1433
"""A class to handle client connections.
2242
1435
Instantiated once for each connection to handle it.
2243
1436
Note: This will run in its own forked process."""
2245
1438
def handle(self):
2246
1439
with contextlib.closing(self.server.child_pipe) as child_pipe:
2247
1440
logger.info("TCP connection from: %s",
2248
str(self.client_address))
1441
unicode(self.client_address))
2249
1442
logger.debug("Pipe FD: %d",
2250
1443
self.server.child_pipe.fileno())
2252
session = gnutls.ClientSession(self.request)
2254
# priority = ':'.join(("NONE", "+VERS-TLS1.1",
2255
# "+AES-256-CBC", "+SHA1",
2256
# "+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",
2258
1459
# Use a fallback default, since this MUST be set.
2259
1460
priority = self.server.gnutls_priority
2260
1461
if priority is None:
2261
1462
priority = "NORMAL"
2262
gnutls.priority_set_direct(session._c_object,
2263
priority.encode("utf-8"),
1463
(gnutls.library.functions
1464
.gnutls_priority_set_direct(session._c_object,
2266
1467
# Start communication using the Mandos protocol
2267
1468
# Get protocol number
2268
1469
line = self.request.makefile().readline()
2269
1470
logger.debug("Protocol version: %r", line)
2271
1472
if int(line.strip().split()[0]) > 1:
2272
raise RuntimeError(line)
2273
1474
except (ValueError, IndexError, RuntimeError) as error:
2274
1475
logger.error("Unknown protocol version: %s", error)
2277
1478
# Start GnuTLS connection
2279
1480
session.handshake()
2280
except gnutls.Error as error:
1481
except gnutls.errors.GNUTLSError as error:
2281
1482
logger.warning("Handshake failed: %s", error)
2282
1483
# Do not run session.bye() here: the session is not
2283
1484
# established. Just abandon the request.
2285
1486
logger.debug("Handshake succeeded")
2287
1488
approval_required = False
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,
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,
2311
1504
self.client_address)
2312
1505
except KeyError:
2315
1508
if client.approval_delay:
2316
1509
delay = client.approval_delay
2317
1510
client.approvals_pending += 1
2318
1511
approval_required = True
2321
1514
if not client.enabled:
2322
1515
logger.info("Client %s is disabled",
2324
1517
if self.server.use_dbus:
2325
1518
# Emit D-Bus signal
2326
1519
client.Rejected("Disabled")
2329
if client.approved or not client.approval_delay:
2330
# We are approved or approval is disabled
1522
if client._approved or not client.approval_delay:
1523
#We are approved or approval is disabled
2332
elif client.approved is None:
1525
elif client._approved is None:
2333
1526
logger.info("Client %s needs approval",
2335
1528
if self.server.use_dbus:
2336
1529
# Emit D-Bus signal
2337
1530
client.NeedApproval(
2338
client.approval_delay.total_seconds()
2339
* 1000, client.approved_by_default)
1531
client.approval_delay_milliseconds(),
1532
client.approved_by_default)
2341
1534
logger.warning("Client %s was not approved",
3057
2039
use_ipv6 = server_settings["use_ipv6"]
3058
2040
stored_state_path = os.path.join(server_settings["statedir"],
3059
2041
stored_state_file)
3060
foreground = server_settings["foreground"]
3061
zeroconf = server_settings["zeroconf"]
3064
initlogger(debug, logging.DEBUG)
2044
initlogger(logging.DEBUG)
3066
2046
if not debuglevel:
3069
2049
level = getattr(logging, debuglevel.upper())
3070
initlogger(debug, level)
3072
2052
if server_settings["servicename"] != "Mandos":
3073
syslogger.setFormatter(
3074
logging.Formatter('Mandos ({}) [%(process)d]:'
3075
' %(levelname)s: %(message)s'.format(
3076
server_settings["servicename"])))
2053
syslogger.setFormatter(logging.Formatter
2054
('Mandos (%s) [%%(process)d]:'
2055
' %%(levelname)s: %%(message)s'
2056
% server_settings["servicename"]))
3078
2058
# Parse config file with clients
3079
client_config = configparser.SafeConfigParser(Client
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)
3081
2068
client_config.read(os.path.join(server_settings["configdir"],
3082
2069
"clients.conf"))
3084
2071
global mandos_dbus_service
3085
2072
mandos_dbus_service = None
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
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
3116
2097
except KeyError:
2099
uid = pwd.getpwnam("nobody").pw_uid
2100
gid = pwd.getpwnam("nobody").pw_gid
3125
logger.debug("Did setuid/setgid to {}:{}".format(uid,
3127
2107
except OSError as error:
3128
logger.warning("Failed to setuid/setgid to {}:{}: {}"
3129
.format(uid, gid, os.strerror(error.errno)))
3130
if error.errno != errno.EPERM:
2108
if error[0] != errno.EPERM:
3134
2112
# Enable all possible GnuTLS debugging
3136
2114
# "Use a log level over 10 to enable all debugging options."
3137
2115
# - GnuTLS manual
3138
gnutls.global_set_log_level(11)
2116
gnutls.library.functions.gnutls_global_set_log_level(11)
2118
@gnutls.library.types.gnutls_log_func
3141
2119
def debug_gnutls(level, string):
3142
2120
logger.debug("GnuTLS: %s", string[:-1])
3144
gnutls.global_set_log_function(debug_gnutls)
2122
(gnutls.library.functions
2123
.gnutls_global_set_log_function(debug_gnutls))
3146
2125
# Redirect stdin so all checkers get /dev/null
3147
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2126
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
3148
2127
os.dup2(null, sys.stdin.fileno())
2131
# No console logging
2132
logger.removeHandler(console)
3152
2134
# Need to fork before connecting to D-Bus
3154
2136
# 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.
3161
2139
global main_loop
3162
2140
# From the Avahi example code
3163
DBusGMainLoop(set_as_default=True)
3164
main_loop = GLib.MainLoop()
2141
DBusGMainLoop(set_as_default=True )
2142
main_loop = gobject.MainLoop()
3165
2143
bus = dbus.SystemBus()
3166
2144
# End of Avahi example code
3169
2147
bus_name = dbus.service.BusName("se.recompile.Mandos",
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)
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")
3177
2154
use_dbus = False
3178
2155
server_settings["use_dbus"] = False
3179
2156
tcp_server.use_dbus = False
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"))
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"])))
3191
2166
global multiprocessing_manager
3192
2167
multiprocessing_manager = multiprocessing.Manager()
3194
2169
client_class = Client
3196
client_class = functools.partial(ClientDBus, bus=bus)
3198
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())
3199
2194
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:
3210
2197
# Get client data and settings from last running state.
3211
2198
if server_settings["restore"]:
3213
2200
with open(stored_state_path, "rb") as stored_state:
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"]
2201
clients_data, old_client_settings = (pickle.load
3263
2203
os.remove(stored_state_path)
3264
2204
except IOError as e:
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:",
2205
logger.warning("Could not load persistent state: {0}"
2207
if e.errno != errno.ENOENT:
3272
except EOFError as e:
3273
logger.warning("Could not load persistent state: "
3277
with PGPEngine() as pgp:
3278
for client_name, client in clients_data.items():
3279
# Skip removed clients
3280
if client_name not in client_settings:
2210
with Crypto() as crypt:
2211
for client in clients_data:
2212
client_name = client["name"]
3283
2214
# Decide which value to use after restoring saved state.
3284
2215
# We have three different values: Old config file,
3285
2216
# new config file, and saved state.
3290
2221
# For each value in new config, check if it
3291
2222
# differs from the old config value (Except for
3292
2223
# the "secret" attribute)
3293
if (name != "secret"
3295
old_client_settings[client_name][name])):
3296
client[name] = value
2224
if (name != "secret" and
2225
value != old_client_settings[client_name]
2227
setattr(client, name, value)
3297
2228
except KeyError:
3300
2231
# Clients who has passed its expire date can still be
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"]))
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:
3320
2240
client["enabled"] = False
3322
client["expires"] = (
3323
datetime.datetime.utcnow()
3324
+ client["timeout"])
3325
logger.debug("Last checker succeeded,"
3326
" 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],
3329
client["secret"] = pgp.decrypt(
3330
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 = (
3331
2283
client_settings[client_name]["secret"])
3333
# If decryption fails, we use secret from new settings
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)
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
3354
2295
if not tcp_server.clients:
3355
2296
logger.warning("No clients defined")
3358
if pidfile is not None:
3362
print(pid, file=pidfile)
3364
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
3367
2310
del pidfilename
3369
for termsig in (signal.SIGHUP, signal.SIGTERM):
3370
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3371
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())
3375
@alternate_dbus_interfaces(
3376
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3377
class MandosDBusService(DBusObjectWithObjectManager):
2318
class MandosDBusService(dbus.service.Object):
3378
2319
"""A D-Bus proxy object"""
3380
2320
def __init__(self):
3381
2321
dbus.service.Object.__init__(self, bus, "/")
3383
2322
_interface = "se.recompile.Mandos"
3385
2324
@dbus.service.signal(_interface, signature="o")
3386
2325
def ClientAdded(self, objpath):
3390
2329
@dbus.service.signal(_interface, signature="ss")
3391
def ClientNotFound(self, key_id, address):
2330
def ClientNotFound(self, fingerprint, address):
3395
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3397
2334
@dbus.service.signal(_interface, signature="os")
3398
2335
def ClientRemoved(self, objpath, name):
3402
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3404
2339
@dbus.service.method(_interface, out_signature="ao")
3405
2340
def GetAllClients(self):
3407
return dbus.Array(c.dbus_object_path for c in
3408
tcp_server.clients.values())
3410
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
2342
return dbus.Array(c.dbus_object_path
2344
tcp_server.clients.itervalues())
3412
2346
@dbus.service.method(_interface,
3413
2347
out_signature="a{oa{sv}}")
3414
2348
def GetAllClientsWithProperties(self):
3416
2350
return dbus.Dictionary(
3417
{c.dbus_object_path: c.GetAll(
3418
"se.recompile.Mandos.Client")
3419
for c in tcp_server.clients.values()},
2351
((c.dbus_object_path, c.GetAll(""))
2352
for c in tcp_server.clients.itervalues()),
3420
2353
signature="oa{sv}")
3422
2355
@dbus.service.method(_interface, in_signature="o")
3423
2356
def RemoveClient(self, object_path):
3425
for c in tcp_server.clients.values():
2358
for c in tcp_server.clients.itervalues():
3426
2359
if c.dbus_object_path == object_path:
3427
2360
del tcp_server.clients[c.name]
3428
2361
c.remove_from_connection()
3429
# Don't signal the disabling
2362
# Don't signal anything except ClientRemoved
3430
2363
c.disable(quiet=True)
3431
# Emit D-Bus signal for removal
3432
self.client_removed_signal(c)
2365
self.ClientRemoved(object_path, c.name)
3434
2367
raise KeyError(object_path)
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
2371
class MandosDBusServiceTransitional(MandosDBusService):
2372
__metaclass__ = AlternateDBusNamesMetaclass
2373
mandos_dbus_service = MandosDBusServiceTransitional()
3482
2376
"Cleanup function; run on exit"
3486
mp.active_children()
2379
multiprocessing.active_children()
3488
2380
if not (tcp_server.clients or client_settings):
3491
2383
# Store client before exiting. Secrets are encrypted with key
3492
2384
# based on what config file has. If config file is
3493
2385
# removed/edited, old secret will thus be unrecovable.
3495
with PGPEngine() as pgp:
3496
for client in tcp_server.clients.values():
2387
with Crypto() as crypt:
2388
for client in tcp_server.clients.itervalues():
3497
2389
key = client_settings[client.name]["secret"]
3498
client.encrypted_secret = pgp.encrypt(client.secret,
2390
client.encrypted_secret = crypt.encrypt(client.secret,
3500
2392
client_dict = {}
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
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)):
3508
2399
exclude.add(name)
3510
2401
client_dict["encrypted_secret"] = (client
3511
2402
.encrypted_secret)
3512
2403
for attr in client.client_structure:
3513
2404
if attr not in exclude:
3514
2405
client_dict[attr] = getattr(client, attr)
3516
clients[client.name] = client_dict
2407
clients.append(client_dict)
3517
2408
del client_settings[client.name]["secret"]
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)
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)
3530
2415
except (IOError, OSError) as e:
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:",
2416
logger.warning("Could not save persistent state: {0}"
2418
if e.errno not in (errno.ENOENT, errno.EACCES):
3544
2421
# Delete all clients, and settings from config
3545
2422
while tcp_server.clients:
3546
2423
name, client = tcp_server.clients.popitem()
3548
2425
client.remove_from_connection()
3549
# Don't signal the disabling
2426
# Don't signal anything except ClientRemoved
3550
2427
client.disable(quiet=True)
3551
# Emit D-Bus signal for removal
3553
mandos_dbus_service.client_removed_signal(client)
2430
mandos_dbus_service.ClientRemoved(client
3554
2433
client_settings.clear()
3556
2435
atexit.register(cleanup)
3558
for client in tcp_server.clients.values():
2437
for client in tcp_server.clients.itervalues():
3560
# Emit D-Bus signal for adding
3561
mandos_dbus_service.client_added_signal(client)
2440
mandos_dbus_service.ClientAdded(client.dbus_object_path)
3562
2441
# Need to initiate checking of clients
3563
2442
if client.enabled:
3564
2443
client.init_checker()
3566
2445
tcp_server.enable()
3567
2446
tcp_server.server_activate()
3569
2448
# Find out what port we got
3571
service.port = tcp_server.socket.getsockname()[1]
2449
service.port = tcp_server.socket.getsockname()[1]
3573
2451
logger.info("Now listening on address %r, port %d,"
3574
" flowinfo %d, scope_id %d",
3575
*tcp_server.socket.getsockname())
2452
" flowinfo %d, scope_id %d"
2453
% tcp_server.socket.getsockname())
3577
logger.info("Now listening on address %r, port %d",
3578
*tcp_server.socket.getsockname())
3580
# 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]
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))
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))
3598
2475
logger.debug("Starting main loop")
3599
2476
main_loop.run()
3600
2477
except AvahiError as error:
3601
logger.critical("Avahi Error", exc_info=error)
2478
logger.critical("AvahiError: %s", error)
3604
2481
except KeyboardInterrupt: