489
364
follow_name_owner_changes=True),
490
365
avahi.DBUS_INTERFACE_SERVER)
491
366
self.server.connect_to_signal("StateChanged",
492
self.server_state_changed)
367
self.server_state_changed)
493
368
self.server_state_changed(self.server.GetState())
496
370
class AvahiServiceToSyslog(AvahiService):
497
def rename(self, *args, **kwargs):
498
372
"""Add the new name to the syslog messages"""
499
ret = super(AvahiServiceToSyslog, self).rename(*args, **kwargs)
500
syslogger.setFormatter(logging.Formatter(
501
'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'
506
# Pretend that we have a GnuTLS module
507
class GnuTLS(object):
508
"""This isn't so much a class as it is a module-like namespace.
509
It is instantiated once, and simulates having a GnuTLS module."""
511
library = ctypes.util.find_library("gnutls")
513
library = ctypes.util.find_library("gnutls-deb0")
514
_library = ctypes.cdll.LoadLibrary(library)
516
_need_version = b"3.3.0"
517
_tls_rawpk_version = b"3.6.6"
520
# Need to use "self" here, since this method is called before
521
# the assignment to the "gnutls" global variable happens.
522
if self.check_version(self._need_version) is None:
523
raise self.Error("Needs GnuTLS {} or later"
524
.format(self._need_version))
526
# Unless otherwise indicated, the constants and types below are
527
# all from the gnutls/gnutls.h C header file.
538
E_NO_CERTIFICATE_FOUND = -49
543
KEYID_USE_SHA256 = 1 # gnutls/x509.h
544
OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
547
class session_int(ctypes.Structure):
549
session_t = ctypes.POINTER(session_int)
551
class certificate_credentials_st(ctypes.Structure):
553
certificate_credentials_t = ctypes.POINTER(
554
certificate_credentials_st)
555
certificate_type_t = ctypes.c_int
557
class datum_t(ctypes.Structure):
558
_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
559
('size', ctypes.c_uint)]
561
class openpgp_crt_int(ctypes.Structure):
563
openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
564
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
565
log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
566
credentials_type_t = ctypes.c_int
567
transport_ptr_t = ctypes.c_void_p
568
close_request_t = ctypes.c_int
571
class Error(Exception):
572
# We need to use the class name "GnuTLS" here, since this
573
# exception might be raised from within GnuTLS.__init__,
574
# which is called before the assignment to the "gnutls"
575
# global variable has happened.
576
def __init__(self, message=None, code=None, args=()):
577
# Default usage is by a message string, but if a return
578
# code is passed, convert it to a string with
581
if message is None and code is not None:
582
message = GnuTLS.strerror(code)
583
return super(GnuTLS.Error, self).__init__(
586
class CertificateSecurityError(Error):
590
class Credentials(object):
592
self._c_object = gnutls.certificate_credentials_t()
593
gnutls.certificate_allocate_credentials(
594
ctypes.byref(self._c_object))
595
self.type = gnutls.CRD_CERTIFICATE
598
gnutls.certificate_free_credentials(self._c_object)
600
class ClientSession(object):
601
def __init__(self, socket, credentials=None):
602
self._c_object = gnutls.session_t()
603
gnutls_flags = gnutls.CLIENT
604
if gnutls.check_version("3.5.6"):
605
gnutls_flags |= gnutls.NO_TICKETS
607
gnutls_flags |= gnutls.ENABLE_RAWPK
608
gnutls.init(ctypes.byref(self._c_object), gnutls_flags)
610
gnutls.set_default_priority(self._c_object)
611
gnutls.transport_set_ptr(self._c_object, socket.fileno())
612
gnutls.handshake_set_private_extensions(self._c_object,
615
if credentials is None:
616
credentials = gnutls.Credentials()
617
gnutls.credentials_set(self._c_object, credentials.type,
618
ctypes.cast(credentials._c_object,
620
self.credentials = credentials
623
gnutls.deinit(self._c_object)
626
return gnutls.handshake(self._c_object)
628
def send(self, data):
632
data_len -= gnutls.record_send(self._c_object,
637
return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
639
# Error handling functions
640
def _error_code(result):
641
"""A function to raise exceptions on errors, suitable
642
for the 'restype' attribute on ctypes functions"""
645
if result == gnutls.E_NO_CERTIFICATE_FOUND:
646
raise gnutls.CertificateSecurityError(code=result)
647
raise gnutls.Error(code=result)
649
def _retry_on_error(result, func, arguments):
650
"""A function to retry on some errors, suitable
651
for the 'errcheck' attribute on ctypes functions"""
653
if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
654
return _error_code(result)
655
result = func(*arguments)
658
# Unless otherwise indicated, the function declarations below are
659
# all from the gnutls/gnutls.h C header file.
662
priority_set_direct = _library.gnutls_priority_set_direct
663
priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
664
ctypes.POINTER(ctypes.c_char_p)]
665
priority_set_direct.restype = _error_code
667
init = _library.gnutls_init
668
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
669
init.restype = _error_code
671
set_default_priority = _library.gnutls_set_default_priority
672
set_default_priority.argtypes = [session_t]
673
set_default_priority.restype = _error_code
675
record_send = _library.gnutls_record_send
676
record_send.argtypes = [session_t, ctypes.c_void_p,
678
record_send.restype = ctypes.c_ssize_t
679
record_send.errcheck = _retry_on_error
681
certificate_allocate_credentials = (
682
_library.gnutls_certificate_allocate_credentials)
683
certificate_allocate_credentials.argtypes = [
684
ctypes.POINTER(certificate_credentials_t)]
685
certificate_allocate_credentials.restype = _error_code
687
certificate_free_credentials = (
688
_library.gnutls_certificate_free_credentials)
689
certificate_free_credentials.argtypes = [
690
certificate_credentials_t]
691
certificate_free_credentials.restype = None
693
handshake_set_private_extensions = (
694
_library.gnutls_handshake_set_private_extensions)
695
handshake_set_private_extensions.argtypes = [session_t,
697
handshake_set_private_extensions.restype = None
699
credentials_set = _library.gnutls_credentials_set
700
credentials_set.argtypes = [session_t, credentials_type_t,
702
credentials_set.restype = _error_code
704
strerror = _library.gnutls_strerror
705
strerror.argtypes = [ctypes.c_int]
706
strerror.restype = ctypes.c_char_p
708
certificate_type_get = _library.gnutls_certificate_type_get
709
certificate_type_get.argtypes = [session_t]
710
certificate_type_get.restype = _error_code
712
certificate_get_peers = _library.gnutls_certificate_get_peers
713
certificate_get_peers.argtypes = [session_t,
714
ctypes.POINTER(ctypes.c_uint)]
715
certificate_get_peers.restype = ctypes.POINTER(datum_t)
717
global_set_log_level = _library.gnutls_global_set_log_level
718
global_set_log_level.argtypes = [ctypes.c_int]
719
global_set_log_level.restype = None
721
global_set_log_function = _library.gnutls_global_set_log_function
722
global_set_log_function.argtypes = [log_func]
723
global_set_log_function.restype = None
725
deinit = _library.gnutls_deinit
726
deinit.argtypes = [session_t]
727
deinit.restype = None
729
handshake = _library.gnutls_handshake
730
handshake.argtypes = [session_t]
731
handshake.restype = _error_code
732
handshake.errcheck = _retry_on_error
734
transport_set_ptr = _library.gnutls_transport_set_ptr
735
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
736
transport_set_ptr.restype = None
738
bye = _library.gnutls_bye
739
bye.argtypes = [session_t, close_request_t]
740
bye.restype = _error_code
741
bye.errcheck = _retry_on_error
743
check_version = _library.gnutls_check_version
744
check_version.argtypes = [ctypes.c_char_p]
745
check_version.restype = ctypes.c_char_p
747
has_rawpk = bool(check_version(_tls_rawpk_version))
751
class pubkey_st(ctypes.Structure):
753
pubkey_t = ctypes.POINTER(pubkey_st)
755
x509_crt_fmt_t = ctypes.c_int
757
# All the function declarations below are from gnutls/abstract.h
758
pubkey_init = _library.gnutls_pubkey_init
759
pubkey_init.argtypes = [ctypes.POINTER(pubkey_t)]
760
pubkey_init.restype = _error_code
762
pubkey_import = _library.gnutls_pubkey_import
763
pubkey_import.argtypes = [pubkey_t, ctypes.POINTER(datum_t),
765
pubkey_import.restype = _error_code
767
pubkey_get_key_id = _library.gnutls_pubkey_get_key_id
768
pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,
769
ctypes.POINTER(ctypes.c_ubyte),
770
ctypes.POINTER(ctypes.c_size_t)]
771
pubkey_get_key_id.restype = _error_code
773
pubkey_deinit = _library.gnutls_pubkey_deinit
774
pubkey_deinit.argtypes = [pubkey_t]
775
pubkey_deinit.restype = None
777
# All the function declarations below are from gnutls/openpgp.h
779
openpgp_crt_init = _library.gnutls_openpgp_crt_init
780
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
781
openpgp_crt_init.restype = _error_code
783
openpgp_crt_import = _library.gnutls_openpgp_crt_import
784
openpgp_crt_import.argtypes = [openpgp_crt_t,
785
ctypes.POINTER(datum_t),
787
openpgp_crt_import.restype = _error_code
789
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
790
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
791
ctypes.POINTER(ctypes.c_uint)]
792
openpgp_crt_verify_self.restype = _error_code
794
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
795
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
796
openpgp_crt_deinit.restype = None
798
openpgp_crt_get_fingerprint = (
799
_library.gnutls_openpgp_crt_get_fingerprint)
800
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
804
openpgp_crt_get_fingerprint.restype = _error_code
806
if check_version("3.6.4"):
807
certificate_type_get2 = _library.gnutls_certificate_type_get2
808
certificate_type_get2.argtypes = [session_t, ctypes.c_int]
809
certificate_type_get2.restype = _error_code
811
# Remove non-public functions
812
del _error_code, _retry_on_error
813
# Create the global "gnutls" object, simulating a module
817
def call_pipe(connection, # : multiprocessing.Connection
818
func, *args, **kwargs):
819
"""This function is meant to be called by multiprocessing.Process
821
This function runs func(*args, **kwargs), and writes the resulting
822
return value on the provided multiprocessing.Connection.
824
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))
828
386
class Client(object):
829
387
"""A representation of a client host served by this server.
832
approved: bool(); 'None' if not yet approved/disapproved
390
_approved: bool(); 'None' if not yet approved/disapproved
833
391
approval_delay: datetime.timedelta(); Time to wait for approval
834
392
approval_duration: datetime.timedelta(); Duration of one approval
835
393
checker: subprocess.Popen(); a running checker process used
836
394
to see if the client lives.
837
395
'None' if no process is running.
838
checker_callback_tag: a GLib event source tag, or None
396
checker_callback_tag: a gobject event source tag, or None
839
397
checker_command: string; External command which is run to check
840
398
if client lives. %() expansions are done at
841
399
runtime with vars(self) as dict, so that for
842
400
instance %(name)s can be used in the command.
843
checker_initiator_tag: a GLib event source tag, or None
401
checker_initiator_tag: a gobject event source tag, or None
844
402
created: datetime.datetime(); (UTC) object creation
845
403
client_structure: Object describing what attributes a client has
846
404
and is used for storing the client at exit
847
405
current_checker_command: string; current running checker_command
848
disable_initiator_tag: a GLib event source tag, or None
406
disable_initiator_tag: a gobject event source tag, or None
850
408
fingerprint: string (40 or 32 hexadecimal digits); used to
851
uniquely identify an OpenPGP client
852
key_id: string (64 hexadecimal digits); used to uniquely identify
853
a client using raw public keys
409
uniquely identify the client
854
410
host: string; available for use by the checker command
855
411
interval: datetime.timedelta(); How often to start a new checker
856
412
last_approval_request: datetime.datetime(); (UTC) or None
857
413
last_checked_ok: datetime.datetime(); (UTC) or None
858
415
last_checker_status: integer between 0 and 255 reflecting exit
859
416
status of last checker. -1 reflects crashed
860
checker, -2 means no checker completed yet.
861
last_checker_signal: The signal which killed the last checker, if
862
last_checker_status is -1
863
last_enabled: datetime.datetime(); (UTC) or None
418
last_enabled: datetime.datetime(); (UTC)
864
419
name: string; from the config file, used in log messages and
865
420
D-Bus identifiers
866
421
secret: bytestring; sent verbatim (over TLS) to client
867
422
timeout: datetime.timedelta(); How long from last_checked_ok
868
423
until this client is disabled
869
extended_timeout: extra long timeout when secret has been sent
424
extended_timeout: extra long timeout when password has been sent
870
425
runtime_expansions: Allowed attributes for runtime expansion.
871
426
expires: datetime.datetime(); time (UTC) when a client will be
872
427
disabled, or None
873
server_settings: The server_settings dict from main()
876
430
runtime_expansions = ("approval_delay", "approval_duration",
877
"created", "enabled", "expires", "key_id",
878
"fingerprint", "host", "interval",
879
"last_approval_request", "last_checked_ok",
431
"created", "enabled", "fingerprint",
432
"host", "interval", "last_checked_ok",
880
433
"last_enabled", "name", "timeout")
883
"extended_timeout": "PT15M",
885
"checker": "fping -q -- %%(host)s",
887
"approval_delay": "PT0S",
888
"approval_duration": "PT1S",
889
"approved_by_default": "True",
894
def config_parser(config):
895
"""Construct a new dict of client settings of this form:
896
{ client_name: {setting_name: value, ...}, ...}
897
with exceptions for any special settings as defined above.
898
NOTE: Must be a pure function. Must return the same result
899
value given the same arguments.
902
for client_name in config.sections():
903
section = dict(config.items(client_name))
904
client = settings[client_name] = {}
906
client["host"] = section["host"]
907
# Reformat values from string types to Python types
908
client["approved_by_default"] = config.getboolean(
909
client_name, "approved_by_default")
910
client["enabled"] = config.getboolean(client_name,
913
# Uppercase and remove spaces from key_id and fingerprint
914
# for later comparison purposes with return value from the
915
# key_id() and fingerprint() functions
916
client["key_id"] = (section.get("key_id", "").upper()
918
client["fingerprint"] = (section["fingerprint"].upper()
920
if "secret" in section:
921
client["secret"] = codecs.decode(section["secret"]
924
elif "secfile" in section:
925
with open(os.path.expanduser(os.path.expandvars
926
(section["secfile"])),
928
client["secret"] = secfile.read()
930
raise TypeError("No secret or secfile for section {}"
932
client["timeout"] = string_to_delta(section["timeout"])
933
client["extended_timeout"] = string_to_delta(
934
section["extended_timeout"])
935
client["interval"] = string_to_delta(section["interval"])
936
client["approval_delay"] = string_to_delta(
937
section["approval_delay"])
938
client["approval_duration"] = string_to_delta(
939
section["approval_duration"])
940
client["checker_command"] = section["checker"]
941
client["last_approval_request"] = None
942
client["last_checked_ok"] = None
943
client["last_checker_status"] = -2
947
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'
949
if server_settings is None:
951
self.server_settings = server_settings
952
# adding all client settings
953
for setting, value in settings.items():
954
setattr(self, setting, value)
957
if not hasattr(self, "last_enabled"):
958
self.last_enabled = datetime.datetime.utcnow()
959
if not hasattr(self, "expires"):
960
self.expires = (datetime.datetime.utcnow()
963
self.last_enabled = None
966
457
logger.debug("Creating client %r", self.name)
967
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()
968
463
logger.debug(" Fingerprint: %s", self.fingerprint)
969
self.created = settings.get("created",
970
datetime.datetime.utcnow())
972
# 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"])
973
485
self.checker = None
974
486
self.checker_initiator_tag = None
975
487
self.disable_initiator_tag = None
488
self.expires = datetime.datetime.utcnow() + self.timeout
976
489
self.checker_callback_tag = None
490
self.checker_command = config["checker"]
977
491
self.current_checker_command = None
492
self._approved = None
493
self.approved_by_default = config.get("approved_by_default",
979
495
self.approvals_pending = 0
980
self.changedstate = multiprocessing_manager.Condition(
981
multiprocessing_manager.Lock())
982
self.client_structure = [attr
983
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()
984
505
if not attr.startswith("_")]
985
506
self.client_structure.append("client_structure")
987
for name, t in inspect.getmembers(
988
type(self), lambda obj: isinstance(obj, property)):
508
for name, t in inspect.getmembers(type(self),
989
512
if not name.startswith("_"):
990
513
self.client_structure.append(name)
992
515
# Send notice to process children that client state has changed
993
516
def send_changedstate(self):
994
517
with self.changedstate:
995
518
self.changedstate.notify_all()
997
520
def enable(self):
998
521
"""Start this client's checker and timeout hooks"""
999
522
if getattr(self, "enabled", False):
1000
523
# Already enabled
525
self.send_changedstate()
1002
526
self.expires = datetime.datetime.utcnow() + self.timeout
1003
527
self.enabled = True
1004
528
self.last_enabled = datetime.datetime.utcnow()
1005
529
self.init_checker()
1006
self.send_changedstate()
1008
531
def disable(self, quiet=True):
1009
532
"""Disable this client."""
1010
533
if not getattr(self, "enabled", False):
536
self.send_changedstate()
1013
538
logger.info("Disabling client %s", self.name)
1014
if getattr(self, "disable_initiator_tag", None) is not None:
1015
GLib.source_remove(self.disable_initiator_tag)
539
if getattr(self, "disable_initiator_tag", False):
540
gobject.source_remove(self.disable_initiator_tag)
1016
541
self.disable_initiator_tag = None
1017
542
self.expires = None
1018
if getattr(self, "checker_initiator_tag", None) is not None:
1019
GLib.source_remove(self.checker_initiator_tag)
543
if getattr(self, "checker_initiator_tag", False):
544
gobject.source_remove(self.checker_initiator_tag)
1020
545
self.checker_initiator_tag = None
1021
546
self.stop_checker()
1022
547
self.enabled = False
1024
self.send_changedstate()
1025
# 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
1028
551
def __del__(self):
1031
554
def init_checker(self):
1032
555
# Schedule a new checker to be started an 'interval' from now,
1033
556
# and every interval from then on.
1034
if self.checker_initiator_tag is not None:
1035
GLib.source_remove(self.checker_initiator_tag)
1036
self.checker_initiator_tag = GLib.timeout_add(
1037
int(self.interval.total_seconds() * 1000),
557
self.checker_initiator_tag = (gobject.timeout_add
558
(self.interval_milliseconds(),
1039
560
# Schedule a disable() when 'timeout' has passed
1040
if self.disable_initiator_tag is not None:
1041
GLib.source_remove(self.disable_initiator_tag)
1042
self.disable_initiator_tag = GLib.timeout_add(
1043
int(self.timeout.total_seconds() * 1000), self.disable)
561
self.disable_initiator_tag = (gobject.timeout_add
562
(self.timeout_milliseconds(),
1044
564
# Also start a new checker *right now*.
1045
565
self.start_checker()
1047
def checker_callback(self, source, condition, connection,
567
def checker_callback(self, pid, condition, command):
1049
568
"""The checker has completed, so take appropriate actions."""
1050
569
self.checker_callback_tag = None
1051
570
self.checker = None
1052
# Read return code from connection (see call_pipe)
1053
returncode = connection.recv()
1057
self.last_checker_status = returncode
1058
self.last_checker_signal = None
571
if os.WIFEXITED(condition):
572
self.last_checker_status = os.WEXITSTATUS(condition)
1059
573
if self.last_checker_status == 0:
1060
574
logger.info("Checker for %(name)s succeeded",
1062
576
self.checked_ok()
1064
logger.info("Checker for %(name)s failed", vars(self))
578
logger.info("Checker for %(name)s failed",
1066
581
self.last_checker_status = -1
1067
self.last_checker_signal = -returncode
1068
582
logger.warning("Checker for %(name)s crashed?",
1072
def checked_ok(self):
1073
"""Assert that the client has been seen, alive and well."""
1074
self.last_checked_ok = datetime.datetime.utcnow()
1075
self.last_checker_status = 0
1076
self.last_checker_signal = None
1079
def bump_timeout(self, timeout=None):
1080
"""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,
1081
591
if timeout is None:
1082
592
timeout = self.timeout
593
self.last_checked_ok = datetime.datetime.utcnow()
1083
594
if self.disable_initiator_tag is not None:
1084
GLib.source_remove(self.disable_initiator_tag)
1085
self.disable_initiator_tag = None
595
gobject.source_remove(self.disable_initiator_tag)
1086
596
if getattr(self, "enabled", False):
1087
self.disable_initiator_tag = GLib.timeout_add(
1088
int(timeout.total_seconds() * 1000), self.disable)
597
self.disable_initiator_tag = (gobject.timeout_add
598
(_timedelta_to_milliseconds
599
(timeout), self.disable))
1089
600
self.expires = datetime.datetime.utcnow() + timeout
1091
602
def need_approval(self):
1092
603
self.last_approval_request = datetime.datetime.utcnow()
1094
605
def start_checker(self):
1095
606
"""Start a new checker subprocess if one is not running.
1097
608
If a checker already exists, leave it running and do
1099
610
# The reason for not killing a running checker is that if we
1100
# did that, and if a checker (for some reason) started running
1101
# slowly and taking more than 'interval' time, then the client
1102
# would inevitably timeout, since no checker would get a
1103
# 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
1104
615
# checkers alone, the checker would have to take more time
1105
616
# than 'timeout' for the client to be disabled, which is as it
1108
if self.checker is not None and not self.checker.is_alive():
1109
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)
1112
632
# Start a new checker if needed
1113
633
if self.checker is None:
1114
# Escape attributes for the shell
1116
attr: re.escape(str(getattr(self, attr)))
1117
for attr in self.runtime_expansions}
1119
command = self.checker_command % escaped_attrs
1120
except TypeError as error:
1121
logger.error('Could not format string "%s"',
1122
self.checker_command,
1124
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
1125
653
self.current_checker_command = command
1126
logger.info("Starting checker %r for %s", command,
1128
# We don't need to redirect stdout and stderr, since
1129
# in normal mode, that is already done by daemon(),
1130
# and in debug mode we don't want to. (Stdin is
1131
# always replaced by /dev/null.)
1132
# The exception is when not debugging but nevertheless
1133
# running in the foreground; use the previously
1135
popen_args = {"close_fds": True,
1138
if (not self.server_settings["debug"]
1139
and self.server_settings["foreground"]):
1140
popen_args.update({"stdout": wnull,
1142
pipe = multiprocessing.Pipe(duplex=False)
1143
self.checker = multiprocessing.Process(
1145
args=(pipe[1], subprocess.call, command),
1147
self.checker.start()
1148
self.checker_callback_tag = GLib.io_add_watch(
1149
pipe[0].fileno(), GLib.IO_IN,
1150
self.checker_callback, pipe[0], command)
1151
# 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
1154
680
def stop_checker(self):
1155
681
"""Force the checker process, if any, to stop."""
1156
682
if self.checker_callback_tag:
1157
GLib.source_remove(self.checker_callback_tag)
683
gobject.source_remove(self.checker_callback_tag)
1158
684
self.checker_callback_tag = None
1159
685
if getattr(self, "checker", None) is None:
1161
687
logger.debug("Stopping checker for %(name)s", vars(self))
1162
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
1163
696
self.checker = None
1166
def dbus_service_property(dbus_interface,
699
def dbus_service_property(dbus_interface, signature="v",
700
access="readwrite", byte_arrays=False):
1170
701
"""Decorators for marking methods of a DBusObjectWithProperties to
1171
702
become properties on the D-Bus.
1173
704
The decorated method will be called with no arguments by "Get"
1174
705
and with one argument by "Set".
1176
707
The parameters, where they are supported, are the same as
1177
708
dbus.service.method, except there is only "signature", since the
1178
709
type from Get() and the type sent to Set() is the same.
1511
879
except (AttributeError, xml.dom.DOMException,
1512
880
xml.parsers.expat.ExpatError) as error:
1513
881
logger.error("Failed to override Introspection method",
1519
dbus.OBJECT_MANAGER_IFACE
1520
except AttributeError:
1521
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1524
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1525
"""A D-Bus object with an ObjectManager.
1527
Classes inheriting from this exposes the standard
1528
GetManagedObjects call and the InterfacesAdded and
1529
InterfacesRemoved signals on the standard
1530
"org.freedesktop.DBus.ObjectManager" interface.
1532
Note: No signals are sent automatically; they must be sent
1535
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1536
out_signature="a{oa{sa{sv}}}")
1537
def GetManagedObjects(self):
1538
"""This function must be overridden"""
1539
raise NotImplementedError()
1541
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1542
signature="oa{sa{sv}}")
1543
def InterfacesAdded(self, object_path, interfaces_and_properties):
1546
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1547
def InterfacesRemoved(self, object_path, interfaces):
1550
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1552
path_keyword='object_path',
1553
connection_keyword='connection')
1554
def Introspect(self, object_path, connection):
1555
"""Overloading of standard D-Bus method.
1557
Override return argument name of GetManagedObjects to be
1558
"objpath_interfaces_and_properties"
1560
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1564
document = xml.dom.minidom.parseString(xmlstring)
1566
for if_tag in document.getElementsByTagName("interface"):
1567
# Fix argument name for the GetManagedObjects method
1568
if (if_tag.getAttribute("name")
1569
== dbus.OBJECT_MANAGER_IFACE):
1570
for cn in if_tag.getElementsByTagName("method"):
1571
if (cn.getAttribute("name")
1572
== "GetManagedObjects"):
1573
for arg in cn.getElementsByTagName("arg"):
1574
if (arg.getAttribute("direction")
1578
"objpath_interfaces"
1580
xmlstring = document.toxml("utf-8")
1582
except (AttributeError, xml.dom.DOMException,
1583
xml.parsers.expat.ExpatError) as error:
1584
logger.error("Failed to override Introspection method",
1589
def datetime_to_dbus(dt, variant_level=0):
886
def datetime_to_dbus (dt, variant_level=0):
1590
887
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1592
return dbus.String("", variant_level=variant_level)
1593
return dbus.String(dt.isoformat(), variant_level=variant_level)
1596
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1597
"""A class decorator; applied to a subclass of
1598
dbus.service.Object, it will add alternate D-Bus attributes with
1599
interface names according to the "alt_interface_names" mapping.
1602
@alternate_dbus_interfaces({"org.example.Interface":
1603
"net.example.AlternateInterface"})
1604
class SampleDBusObject(dbus.service.Object):
1605
@dbus.service.method("org.example.Interface")
1606
def SampleDBusMethod():
1609
The above "SampleDBusMethod" on "SampleDBusObject" will be
1610
reachable via two interfaces: "org.example.Interface" and
1611
"net.example.AlternateInterface", the latter of which will have
1612
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1613
"true", unless "deprecate" is passed with a False value.
1615
This works for methods and signals, and also for D-Bus properties
1616
(from DBusObjectWithProperties) and interfaces (from the
1617
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.
1621
for orig_interface_name, alt_interface_name in (
1622
alt_interface_names.items()):
1624
interface_names = set()
1625
# Go though all attributes of the class
1626
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):
1627
906
# Ignore non-D-Bus attributes, and D-Bus attributes
1628
907
# with the wrong interface name
1629
908
if (not hasattr(attribute, "_dbus_interface")
1630
or not attribute._dbus_interface.startswith(
1631
orig_interface_name)):
909
or not attribute._dbus_interface
910
.startswith("se.recompile.Mandos")):
1633
912
# Create an alternate D-Bus interface name based on
1634
913
# the current name
1635
alt_interface = attribute._dbus_interface.replace(
1636
orig_interface_name, alt_interface_name)
1637
interface_names.add(alt_interface)
914
alt_interface = (attribute._dbus_interface
915
.replace("se.recompile.Mandos",
916
"se.bsnet.fukt.Mandos"))
1638
917
# Is this a D-Bus signal?
1639
918
if getattr(attribute, "_dbus_is_signal", False):
1640
# Extract the original non-method undecorated
1641
# function by black magic
1642
if sys.version_info.major == 2:
1643
nonmethod_func = (dict(
919
# Extract the original non-method function by
921
nonmethod_func = (dict(
1644
922
zip(attribute.func_code.co_freevars,
1645
attribute.__closure__))
1646
["func"].cell_contents)
1648
nonmethod_func = (dict(
1649
zip(attribute.__code__.co_freevars,
1650
attribute.__closure__))
1651
["func"].cell_contents)
923
attribute.__closure__))["func"]
1652
925
# Create a new, but exactly alike, function
1653
926
# object, and decorate it to be a new D-Bus signal
1654
927
# with the alternate D-Bus interface name
1655
new_function = copy_function(nonmethod_func)
1656
new_function = (dbus.service.signal(
1658
attribute._dbus_signature)(new_function))
1659
# Copy annotations, if any
1661
new_function._dbus_annotations = dict(
1662
attribute._dbus_annotations)
1663
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)))
1666
937
# Define a creator of a function to call both the
1667
# original and alternate functions, so both the
1668
# original and alternate signals gets sent when
1669
# the function is called
938
# old and new functions, so both the old and new
939
# signals gets sent when the function is called
1670
940
def fixscope(func1, func2):
1671
941
"""This function is a scope container to pass
1672
942
func1 and func2 to the "call_both" function
1673
943
outside of its arguments"""
1675
@functools.wraps(func2)
1676
944
def call_both(*args, **kwargs):
1677
945
"""This function will emit two D-Bus
1678
946
signals by calling func1 and func2"""
1679
947
func1(*args, **kwargs)
1680
948
func2(*args, **kwargs)
1681
# Make wrapper function look like a D-Bus
1683
for name, attr in inspect.getmembers(func2):
1684
if name.startswith("_dbus_"):
1685
setattr(call_both, name, attr)
1687
949
return call_both
1688
950
# Create the "call_both" function and add it to
1690
attr[attrname] = fixscope(attribute, new_function)
952
attr[attrname] = fixscope(attribute,
1691
954
# Is this a D-Bus method?
1692
955
elif getattr(attribute, "_dbus_is_method", False):
1693
956
# Create a new, but exactly alike, function
1694
957
# object. Decorate it to be a new D-Bus method
1695
958
# with the alternate D-Bus interface name. Add it
1698
dbus.service.method(
1700
attribute._dbus_in_signature,
1701
attribute._dbus_out_signature)
1702
(copy_function(attribute)))
1703
# Copy annotations, if any
1705
attr[attrname]._dbus_annotations = dict(
1706
attribute._dbus_annotations)
1707
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)))
1709
970
# Is this a D-Bus property?
1710
971
elif getattr(attribute, "_dbus_is_property", False):
1711
972
# Create a new, but exactly alike, function
1712
973
# object, and decorate it to be a new D-Bus
1713
974
# property with the alternate D-Bus interface
1714
975
# name. Add it to the class.
1715
attr[attrname] = (dbus_service_property(
1716
alt_interface, attribute._dbus_signature,
1717
attribute._dbus_access,
1718
attribute._dbus_get_args_options
1720
(copy_function(attribute)))
1721
# Copy annotations, if any
1723
attr[attrname]._dbus_annotations = dict(
1724
attribute._dbus_annotations)
1725
except AttributeError:
1727
# Is this a D-Bus interface?
1728
elif getattr(attribute, "_dbus_is_interface", False):
1729
# Create a new, but exactly alike, function
1730
# object. Decorate it to be a new D-Bus interface
1731
# with the alternate D-Bus interface name. Add it
1734
dbus_interface_annotations(alt_interface)
1735
(copy_function(attribute)))
1737
# Deprecate all alternate interfaces
1738
iname = "_AlternateDBusNames_interface_annotation{}"
1739
for interface_name in interface_names:
1741
@dbus_interface_annotations(interface_name)
1743
return {"org.freedesktop.DBus.Deprecated":
1745
# Find an unused name
1746
for aname in (iname.format(i)
1747
for i in itertools.count()):
1748
if aname not in attr:
1752
# Replace the class with a new subclass of it with
1753
# methods, signals, etc. as created above.
1754
if sys.version_info.major == 2:
1755
cls = type(b"{}Alternate".format(cls.__name__),
1758
cls = type("{}Alternate".format(cls.__name__),
1765
@alternate_dbus_interfaces({"se.recompile.Mandos":
1766
"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)
1767
992
class ClientDBus(Client, DBusObjectWithProperties):
1768
993
"""A Client class using D-Bus
1771
996
dbus_object_path: dbus.ObjectPath
1772
997
bus: dbus.SystemBus()
1775
1000
runtime_expansions = (Client.runtime_expansions
1776
+ ("dbus_object_path", ))
1778
_interface = "se.recompile.Mandos.Client"
1001
+ ("dbus_object_path",))
1780
1003
# dbus.service.Object doesn't use super(), so we can't either.
1782
def __init__(self, bus=None, *args, **kwargs):
1005
def __init__(self, bus = None, *args, **kwargs):
1784
1007
Client.__init__(self, *args, **kwargs)
1009
self._approvals_pending = 0
1785
1010
# Only now, when this client is initialized, can it show up on
1787
client_object_name = str(self.name).translate(
1012
client_object_name = unicode(self.name).translate(
1788
1013
{ord("."): ord("_"),
1789
1014
ord("-"): ord("_")})
1790
self.dbus_object_path = dbus.ObjectPath(
1791
"/clients/" + client_object_name)
1015
self.dbus_object_path = (dbus.ObjectPath
1016
("/clients/" + client_object_name))
1792
1017
DBusObjectWithProperties.__init__(self, self.bus,
1793
1018
self.dbus_object_path)
1795
def notifychangeproperty(transform_func, dbus_name,
1796
type_func=lambda x: x,
1798
invalidate_only=False,
1799
_interface=_interface):
1020
def notifychangeproperty(transform_func,
1021
dbus_name, type_func=lambda x: x,
1800
1023
""" Modify a variable so that it's a property which announces
1801
1024
its changes to DBus.
1803
1026
transform_fun: Function that takes a value and a variant_level
1804
1027
and transforms it to a D-Bus type.
1805
1028
dbus_name: D-Bus name of the variable
2196
1384
self.start_checker()
2198
1386
self.stop_checker()
2200
1388
# ObjectPath - property
2202
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
2203
"org.freedesktop.DBus.Deprecated": "true"})
2204
1389
@dbus_service_property(_interface, signature="o", access="read")
2205
1390
def ObjectPath_dbus_property(self):
2206
return self.dbus_object_path # is already a dbus.ObjectPath
1391
return self.dbus_object_path # is already a dbus.ObjectPath
2208
1393
# Secret = property
2210
{"org.freedesktop.DBus.Property.EmitsChangedSignal":
2212
@dbus_service_property(_interface,
1394
@dbus_service_property(_interface, signature="ay",
1395
access="write", byte_arrays=True)
2216
1396
def Secret_dbus_property(self, value):
2217
self.secret = bytes(value)
1397
self.secret = str(value)
2222
1402
class ProxyClient(object):
2223
def __init__(self, child_pipe, key_id, fpr, address):
1403
def __init__(self, child_pipe, fpr, address):
2224
1404
self._pipe = child_pipe
2225
self._pipe.send(('init', key_id, fpr, address))
1405
self._pipe.send(('init', fpr, address))
2226
1406
if not self._pipe.recv():
2227
raise KeyError(key_id or fpr)
2229
1409
def __getattribute__(self, name):
1410
if(name == '_pipe'):
2231
1411
return super(ProxyClient, self).__getattribute__(name)
2232
1412
self._pipe.send(('getattr', name))
2233
1413
data = self._pipe.recv()
2234
1414
if data[0] == 'data':
2236
1416
if data[0] == 'function':
2238
1417
def func(*args, **kwargs):
2239
1418
self._pipe.send(('funcall', name, args, kwargs))
2240
1419
return self._pipe.recv()[1]
2244
1422
def __setattr__(self, name, value):
1423
if(name == '_pipe'):
2246
1424
return super(ProxyClient, self).__setattr__(name, value)
2247
1425
self._pipe.send(('setattr', name, value))
1428
class ClientDBusTransitional(ClientDBus):
1429
__metaclass__ = AlternateDBusNamesMetaclass
2250
1432
class ClientHandler(socketserver.BaseRequestHandler, object):
2251
1433
"""A class to handle client connections.
2253
1435
Instantiated once for each connection to handle it.
2254
1436
Note: This will run in its own forked process."""
2256
1438
def handle(self):
2257
1439
with contextlib.closing(self.server.child_pipe) as child_pipe:
2258
1440
logger.info("TCP connection from: %s",
2259
str(self.client_address))
1441
unicode(self.client_address))
2260
1442
logger.debug("Pipe FD: %d",
2261
1443
self.server.child_pipe.fileno())
2263
session = gnutls.ClientSession(self.request)
2265
# priority = ':'.join(("NONE", "+VERS-TLS1.1",
2266
# "+AES-256-CBC", "+SHA1",
2267
# "+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",
2269
1459
# Use a fallback default, since this MUST be set.
2270
1460
priority = self.server.gnutls_priority
2271
1461
if priority is None:
2272
1462
priority = "NORMAL"
2273
gnutls.priority_set_direct(session._c_object,
2274
priority.encode("utf-8"),
1463
(gnutls.library.functions
1464
.gnutls_priority_set_direct(session._c_object,
2277
1467
# Start communication using the Mandos protocol
2278
1468
# Get protocol number
2279
1469
line = self.request.makefile().readline()
2280
1470
logger.debug("Protocol version: %r", line)
2282
1472
if int(line.strip().split()[0]) > 1:
2283
raise RuntimeError(line)
2284
1474
except (ValueError, IndexError, RuntimeError) as error:
2285
1475
logger.error("Unknown protocol version: %s", error)
2288
1478
# Start GnuTLS connection
2290
1480
session.handshake()
2291
except gnutls.Error as error:
1481
except gnutls.errors.GNUTLSError as error:
2292
1482
logger.warning("Handshake failed: %s", error)
2293
1483
# Do not run session.bye() here: the session is not
2294
1484
# established. Just abandon the request.
2296
1486
logger.debug("Handshake succeeded")
2298
1488
approval_required = False
2300
if gnutls.has_rawpk:
2303
key_id = self.key_id(
2304
self.peer_certificate(session))
2305
except (TypeError, gnutls.Error) as error:
2306
logger.warning("Bad certificate: %s", error)
2308
logger.debug("Key ID: %s", key_id)
2313
fpr = self.fingerprint(
2314
self.peer_certificate(session))
2315
except (TypeError, gnutls.Error) as error:
2316
logger.warning("Bad certificate: %s", error)
2318
logger.debug("Fingerprint: %s", fpr)
2321
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,
2322
1504
self.client_address)
2323
1505
except KeyError:
2326
1508
if client.approval_delay:
2327
1509
delay = client.approval_delay
2328
1510
client.approvals_pending += 1
2329
1511
approval_required = True
2332
1514
if not client.enabled:
2333
1515
logger.info("Client %s is disabled",
2335
1517
if self.server.use_dbus:
2336
1518
# Emit D-Bus signal
2337
1519
client.Rejected("Disabled")
2340
if client.approved or not client.approval_delay:
2341
# We are approved or approval is disabled
1522
if client._approved or not client.approval_delay:
1523
#We are approved or approval is disabled
2343
elif client.approved is None:
1525
elif client._approved is None:
2344
1526
logger.info("Client %s needs approval",
2346
1528
if self.server.use_dbus:
2347
1529
# Emit D-Bus signal
2348
1530
client.NeedApproval(
2349
client.approval_delay.total_seconds()
2350
* 1000, client.approved_by_default)
1531
client.approval_delay_milliseconds(),
1532
client.approved_by_default)
2352
1534
logger.warning("Client %s was not approved",
3066
2039
use_ipv6 = server_settings["use_ipv6"]
3067
2040
stored_state_path = os.path.join(server_settings["statedir"],
3068
2041
stored_state_file)
3069
foreground = server_settings["foreground"]
3070
zeroconf = server_settings["zeroconf"]
3073
initlogger(debug, logging.DEBUG)
2044
initlogger(logging.DEBUG)
3075
2046
if not debuglevel:
3078
2049
level = getattr(logging, debuglevel.upper())
3079
initlogger(debug, level)
3081
2052
if server_settings["servicename"] != "Mandos":
3082
syslogger.setFormatter(
3083
logging.Formatter('Mandos ({}) [%(process)d]:'
3084
' %(levelname)s: %(message)s'.format(
3085
server_settings["servicename"])))
2053
syslogger.setFormatter(logging.Formatter
2054
('Mandos (%s) [%%(process)d]:'
2055
' %%(levelname)s: %%(message)s'
2056
% server_settings["servicename"]))
3087
2058
# Parse config file with clients
3088
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)
3090
2068
client_config.read(os.path.join(server_settings["configdir"],
3091
2069
"clients.conf"))
3093
2071
global mandos_dbus_service
3094
2072
mandos_dbus_service = None
3097
if server_settings["socket"] != "":
3098
socketfd = server_settings["socket"]
3099
tcp_server = MandosServer(
3100
(server_settings["address"], server_settings["port"]),
3102
interface=(server_settings["interface"] or None),
3104
gnutls_priority=server_settings["priority"],
3108
pidfilename = "/run/mandos.pid"
3109
if not os.path.isdir("/run/."):
3110
pidfilename = "/var/run/mandos.pid"
3113
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
3114
except IOError as e:
3115
logger.error("Could not open file %r", pidfilename,
3118
for name, group in (("_mandos", "_mandos"),
3119
("mandos", "mandos"),
3120
("nobody", "nogroup")):
3122
uid = pwd.getpwnam(name).pw_uid
3123
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
3125
2097
except KeyError:
2099
uid = pwd.getpwnam("nobody").pw_uid
2100
gid = pwd.getpwnam("nobody").pw_gid
3134
logger.debug("Did setuid/setgid to {}:{}".format(uid,
3136
2107
except OSError as error:
3137
logger.warning("Failed to setuid/setgid to {}:{}: {}"
3138
.format(uid, gid, os.strerror(error.errno)))
3139
if error.errno != errno.EPERM:
2108
if error[0] != errno.EPERM:
3143
2112
# Enable all possible GnuTLS debugging
3145
2114
# "Use a log level over 10 to enable all debugging options."
3146
2115
# - GnuTLS manual
3147
gnutls.global_set_log_level(11)
2116
gnutls.library.functions.gnutls_global_set_log_level(11)
2118
@gnutls.library.types.gnutls_log_func
3150
2119
def debug_gnutls(level, string):
3151
2120
logger.debug("GnuTLS: %s", string[:-1])
3153
gnutls.global_set_log_function(debug_gnutls)
2122
(gnutls.library.functions
2123
.gnutls_global_set_log_function(debug_gnutls))
3155
2125
# Redirect stdin so all checkers get /dev/null
3156
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2126
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
3157
2127
os.dup2(null, sys.stdin.fileno())
2131
# No console logging
2132
logger.removeHandler(console)
3161
2134
# Need to fork before connecting to D-Bus
3163
2136
# Close all input and output, do double fork, etc.
3166
# multiprocessing will use threads, so before we use GLib we need
3167
# to inform GLib that threads will be used.
3170
2139
global main_loop
3171
2140
# From the Avahi example code
3172
DBusGMainLoop(set_as_default=True)
3173
main_loop = GLib.MainLoop()
2141
DBusGMainLoop(set_as_default=True )
2142
main_loop = gobject.MainLoop()
3174
2143
bus = dbus.SystemBus()
3175
2144
# End of Avahi example code
3178
2147
bus_name = dbus.service.BusName("se.recompile.Mandos",
3181
old_bus_name = dbus.service.BusName(
3182
"se.bsnet.fukt.Mandos", bus,
3184
except dbus.exceptions.DBusException as e:
3185
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")
3186
2154
use_dbus = False
3187
2155
server_settings["use_dbus"] = False
3188
2156
tcp_server.use_dbus = False
3190
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3191
service = AvahiServiceToSyslog(
3192
name=server_settings["servicename"],
3193
servicetype="_mandos._tcp",
3196
if server_settings["interface"]:
3197
service.interface = if_nametoindex(
3198
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"])))
3200
2166
global multiprocessing_manager
3201
2167
multiprocessing_manager = multiprocessing.Manager()
3203
2169
client_class = Client
3205
client_class = functools.partial(ClientDBus, bus=bus)
3207
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())
3208
2194
old_client_settings = {}
3211
# This is used to redirect stdout and stderr for checker processes
3213
wnull = open(os.devnull, "w") # A writable /dev/null
3214
# Only used if server is running in foreground but not in debug
3216
if debug or not foreground:
3219
2197
# Get client data and settings from last running state.
3220
2198
if server_settings["restore"]:
3222
2200
with open(stored_state_path, "rb") as stored_state:
3223
if sys.version_info.major == 2:
3224
clients_data, old_client_settings = pickle.load(
3227
bytes_clients_data, bytes_old_client_settings = (
3228
pickle.load(stored_state, encoding="bytes"))
3229
# Fix bytes to strings
3232
clients_data = {(key.decode("utf-8")
3233
if isinstance(key, bytes)
3236
bytes_clients_data.items()}
3237
del bytes_clients_data
3238
for key in clients_data:
3239
value = {(k.decode("utf-8")
3240
if isinstance(k, bytes) else k): v
3242
clients_data[key].items()}
3243
clients_data[key] = value
3245
value["client_structure"] = [
3247
if isinstance(s, bytes)
3249
value["client_structure"]]
3251
for k in ("name", "host"):
3252
if isinstance(value[k], bytes):
3253
value[k] = value[k].decode("utf-8")
3254
if not value.has_key("key_id"):
3255
value["key_id"] = ""
3256
elif not value.has_key("fingerprint"):
3257
value["fingerprint"] = ""
3258
# old_client_settings
3260
old_client_settings = {
3261
(key.decode("utf-8")
3262
if isinstance(key, bytes)
3265
bytes_old_client_settings.items()}
3266
del bytes_old_client_settings
3268
for value in old_client_settings.values():
3269
if isinstance(value["host"], bytes):
3270
value["host"] = (value["host"]
2201
clients_data, old_client_settings = (pickle.load
3272
2203
os.remove(stored_state_path)
3273
2204
except IOError as e:
3274
if e.errno == errno.ENOENT:
3275
logger.warning("Could not load persistent state:"
3276
" {}".format(os.strerror(e.errno)))
3278
logger.critical("Could not load persistent state:",
2205
logger.warning("Could not load persistent state: {0}"
2207
if e.errno != errno.ENOENT:
3281
except EOFError as e:
3282
logger.warning("Could not load persistent state: "
3286
with PGPEngine() as pgp:
3287
for client_name, client in clients_data.items():
3288
# Skip removed clients
3289
if client_name not in client_settings:
2210
with Crypto() as crypt:
2211
for client in clients_data:
2212
client_name = client["name"]
3292
2214
# Decide which value to use after restoring saved state.
3293
2215
# We have three different values: Old config file,
3294
2216
# new config file, and saved state.
3299
2221
# For each value in new config, check if it
3300
2222
# differs from the old config value (Except for
3301
2223
# the "secret" attribute)
3302
if (name != "secret"
3304
old_client_settings[client_name][name])):
3305
client[name] = value
2224
if (name != "secret" and
2225
value != old_client_settings[client_name]
2227
setattr(client, name, value)
3306
2228
except KeyError:
3309
2231
# Clients who has passed its expire date can still be
3310
# enabled if its last checker was successful. A Client
3311
# whose checker succeeded before we stored its state is
3312
# assumed to have successfully run all checkers during
3314
if client["enabled"]:
3315
if datetime.datetime.utcnow() >= client["expires"]:
3316
if not client["last_checked_ok"]:
3318
"disabling client {} - Client never "
3319
"performed a successful checker".format(
3321
client["enabled"] = False
3322
elif client["last_checker_status"] != 0:
3324
"disabling client {} - Client last"
3325
" checker failed with error code"
3328
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:
3329
2240
client["enabled"] = False
3331
client["expires"] = (
3332
datetime.datetime.utcnow()
3333
+ client["timeout"])
3334
logger.debug("Last checker succeeded,"
3335
" 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],
3338
client["secret"] = pgp.decrypt(
3339
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 = (
3340
2283
client_settings[client_name]["secret"])
3342
# If decryption fails, we use secret from new settings
3343
logger.debug("Failed to decrypt {} old secret".format(
3345
client["secret"] = (client_settings[client_name]
3348
# Add/remove clients based on new changes made to config
3349
for client_name in (set(old_client_settings)
3350
- set(client_settings)):
3351
del clients_data[client_name]
3352
for client_name in (set(client_settings)
3353
- set(old_client_settings)):
3354
clients_data[client_name] = client_settings[client_name]
3356
# Create all client objects
3357
for client_name, client in clients_data.items():
3358
tcp_server.clients[client_name] = client_class(
3361
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
3363
2295
if not tcp_server.clients:
3364
2296
logger.warning("No clients defined")
3367
if pidfile is not None:
3371
print(pid, file=pidfile)
3373
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
3376
2310
del pidfilename
3378
for termsig in (signal.SIGHUP, signal.SIGTERM):
3379
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3380
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())
3384
@alternate_dbus_interfaces(
3385
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3386
class MandosDBusService(DBusObjectWithObjectManager):
2318
class MandosDBusService(dbus.service.Object):
3387
2319
"""A D-Bus proxy object"""
3389
2320
def __init__(self):
3390
2321
dbus.service.Object.__init__(self, bus, "/")
3392
2322
_interface = "se.recompile.Mandos"
3394
2324
@dbus.service.signal(_interface, signature="o")
3395
2325
def ClientAdded(self, objpath):
3399
2329
@dbus.service.signal(_interface, signature="ss")
3400
def ClientNotFound(self, key_id, address):
2330
def ClientNotFound(self, fingerprint, address):
3404
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3406
2334
@dbus.service.signal(_interface, signature="os")
3407
2335
def ClientRemoved(self, objpath, name):
3411
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3413
2339
@dbus.service.method(_interface, out_signature="ao")
3414
2340
def GetAllClients(self):
3416
return dbus.Array(c.dbus_object_path for c in
3417
tcp_server.clients.values())
3419
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
2342
return dbus.Array(c.dbus_object_path
2344
tcp_server.clients.itervalues())
3421
2346
@dbus.service.method(_interface,
3422
2347
out_signature="a{oa{sv}}")
3423
2348
def GetAllClientsWithProperties(self):
3425
2350
return dbus.Dictionary(
3426
{c.dbus_object_path: c.GetAll(
3427
"se.recompile.Mandos.Client")
3428
for c in tcp_server.clients.values()},
2351
((c.dbus_object_path, c.GetAll(""))
2352
for c in tcp_server.clients.itervalues()),
3429
2353
signature="oa{sv}")
3431
2355
@dbus.service.method(_interface, in_signature="o")
3432
2356
def RemoveClient(self, object_path):
3434
for c in tcp_server.clients.values():
2358
for c in tcp_server.clients.itervalues():
3435
2359
if c.dbus_object_path == object_path:
3436
2360
del tcp_server.clients[c.name]
3437
2361
c.remove_from_connection()
3438
# Don't signal the disabling
2362
# Don't signal anything except ClientRemoved
3439
2363
c.disable(quiet=True)
3440
# Emit D-Bus signal for removal
3441
self.client_removed_signal(c)
2365
self.ClientRemoved(object_path, c.name)
3443
2367
raise KeyError(object_path)
3447
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3448
out_signature="a{oa{sa{sv}}}")
3449
def GetManagedObjects(self):
3451
return dbus.Dictionary(
3452
{client.dbus_object_path:
3454
{interface: client.GetAll(interface)
3456
client._get_all_interface_names()})
3457
for client in tcp_server.clients.values()})
3459
def client_added_signal(self, client):
3460
"""Send the new standard signal and the old signal"""
3462
# New standard signal
3463
self.InterfacesAdded(
3464
client.dbus_object_path,
3466
{interface: client.GetAll(interface)
3468
client._get_all_interface_names()}))
3470
self.ClientAdded(client.dbus_object_path)
3472
def client_removed_signal(self, client):
3473
"""Send the new standard signal and the old signal"""
3475
# New standard signal
3476
self.InterfacesRemoved(
3477
client.dbus_object_path,
3478
client._get_all_interface_names())
3480
self.ClientRemoved(client.dbus_object_path,
3483
mandos_dbus_service = MandosDBusService()
3485
# Save modules to variables to exempt the modules from being
3486
# unloaded before the function registered with atexit() is run.
3487
mp = multiprocessing
2371
class MandosDBusServiceTransitional(MandosDBusService):
2372
__metaclass__ = AlternateDBusNamesMetaclass
2373
mandos_dbus_service = MandosDBusServiceTransitional()
3491
2376
"Cleanup function; run on exit"
3495
mp.active_children()
2379
multiprocessing.active_children()
3497
2380
if not (tcp_server.clients or client_settings):
3500
2383
# Store client before exiting. Secrets are encrypted with key
3501
2384
# based on what config file has. If config file is
3502
2385
# removed/edited, old secret will thus be unrecovable.
3504
with PGPEngine() as pgp:
3505
for client in tcp_server.clients.values():
2387
with Crypto() as crypt:
2388
for client in tcp_server.clients.itervalues():
3506
2389
key = client_settings[client.name]["secret"]
3507
client.encrypted_secret = pgp.encrypt(client.secret,
2390
client.encrypted_secret = crypt.encrypt(client.secret,
3509
2392
client_dict = {}
3511
# A list of attributes that can not be pickled
3513
exclude = {"bus", "changedstate", "secret",
3514
"checker", "server_settings"}
3515
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)):
3517
2399
exclude.add(name)
3519
2401
client_dict["encrypted_secret"] = (client
3520
2402
.encrypted_secret)
3521
2403
for attr in client.client_structure:
3522
2404
if attr not in exclude:
3523
2405
client_dict[attr] = getattr(client, attr)
3525
clients[client.name] = client_dict
2407
clients.append(client_dict)
3526
2408
del client_settings[client.name]["secret"]
3529
with tempfile.NamedTemporaryFile(
3533
dir=os.path.dirname(stored_state_path),
3534
delete=False) as stored_state:
3535
pickle.dump((clients, client_settings), stored_state,
3537
tempname = stored_state.name
3538
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)
3539
2415
except (IOError, OSError) as e:
3545
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
3546
logger.warning("Could not save persistent state: {}"
3547
.format(os.strerror(e.errno)))
3549
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):
3553
2421
# Delete all clients, and settings from config
3554
2422
while tcp_server.clients:
3555
2423
name, client = tcp_server.clients.popitem()
3557
2425
client.remove_from_connection()
3558
# Don't signal the disabling
2426
# Don't signal anything except ClientRemoved
3559
2427
client.disable(quiet=True)
3560
# Emit D-Bus signal for removal
3562
mandos_dbus_service.client_removed_signal(client)
2430
mandos_dbus_service.ClientRemoved(client
3563
2433
client_settings.clear()
3565
2435
atexit.register(cleanup)
3567
for client in tcp_server.clients.values():
2437
for client in tcp_server.clients.itervalues():
3569
# Emit D-Bus signal for adding
3570
mandos_dbus_service.client_added_signal(client)
2440
mandos_dbus_service.ClientAdded(client.dbus_object_path)
3571
2441
# Need to initiate checking of clients
3572
2442
if client.enabled:
3573
2443
client.init_checker()
3575
2445
tcp_server.enable()
3576
2446
tcp_server.server_activate()
3578
2448
# Find out what port we got
3580
service.port = tcp_server.socket.getsockname()[1]
2449
service.port = tcp_server.socket.getsockname()[1]
3582
2451
logger.info("Now listening on address %r, port %d,"
3583
" flowinfo %d, scope_id %d",
3584
*tcp_server.socket.getsockname())
2452
" flowinfo %d, scope_id %d"
2453
% tcp_server.socket.getsockname())
3586
logger.info("Now listening on address %r, port %d",
3587
*tcp_server.socket.getsockname())
3589
# 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]
3593
# From the Avahi example code
3596
except dbus.exceptions.DBusException as error:
3597
logger.critical("D-Bus Exception", exc_info=error)
3600
# End of Avahi example code
3602
GLib.io_add_watch(tcp_server.fileno(), GLib.IO_IN,
3603
lambda *args, **kwargs:
3604
(tcp_server.handle_request
3605
(*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))
3607
2475
logger.debug("Starting main loop")
3608
2476
main_loop.run()
3609
2477
except AvahiError as error:
3610
logger.critical("Avahi Error", exc_info=error)
2478
logger.critical("AvahiError: %s", error)
3613
2481
except KeyboardInterrupt: