101
85
except ImportError:
102
86
SO_BINDTODEVICE = None
104
if sys.version_info.major == 2:
108
90
stored_state_file = "clients.pickle"
110
92
logger = logging.getLogger()
93
syslogger = (logging.handlers.SysLogHandler
94
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
95
address = str("/dev/log")))
114
if_nametoindex = ctypes.cdll.LoadLibrary(
115
ctypes.util.find_library("c")).if_nametoindex
98
if_nametoindex = (ctypes.cdll.LoadLibrary
99
(ctypes.util.find_library("c"))
116
101
except (OSError, AttributeError):
118
102
def if_nametoindex(interface):
119
103
"Get an interface index the hard way, i.e. using fcntl()"
120
104
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
121
105
with contextlib.closing(socket.socket()) as s:
122
106
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
123
struct.pack(b"16s16x", interface))
124
interface_index = struct.unpack("I", ifreq[16:20])[0]
107
struct.pack(str("16s16x"),
109
interface_index = struct.unpack(str("I"),
125
111
return interface_index
128
def initlogger(debug, level=logging.WARNING):
114
def initlogger(level=logging.WARNING):
129
115
"""init logger and add loglevel"""
132
syslogger = (logging.handlers.SysLogHandler(
133
facility = logging.handlers.SysLogHandler.LOG_DAEMON,
134
address = "/dev/log"))
135
117
syslogger.setFormatter(logging.Formatter
136
118
('Mandos [%(process)d]: %(levelname)s:'
138
120
logger.addHandler(syslogger)
141
console = logging.StreamHandler()
142
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
146
logger.addHandler(console)
122
console = logging.StreamHandler()
123
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
127
logger.addHandler(console)
147
128
logger.setLevel(level)
150
class PGPError(Exception):
151
"""Exception if encryption/decryption fails"""
131
class CryptoError(Exception):
155
class PGPEngine(object):
135
class Crypto(object):
156
136
"""A simple class for OpenPGP symmetric encryption & decryption"""
158
137
def __init__(self):
138
self.gnupg = GnuPGInterface.GnuPG()
159
139
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
160
self.gnupgargs = ['--batch',
161
'--home', self.tempdir,
140
self.gnupg = GnuPGInterface.GnuPG()
141
self.gnupg.options.meta_interactive = False
142
self.gnupg.options.homedir = self.tempdir
143
self.gnupg.options.extra_args.extend(['--force-mdc',
166
146
def __enter__(self):
169
def __exit__(self, exc_type, exc_value, traceback):
149
def __exit__ (self, exc_type, exc_value, traceback):
189
169
def password_encode(self, password):
190
170
# Passphrase can not be empty and can not contain newlines or
191
171
# NUL bytes. So we prefix it and hex encode it.
192
encoded = b"mandos" + binascii.hexlify(password)
193
if len(encoded) > 2048:
194
# GnuPG can't handle long passwords, so encode differently
195
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
196
.replace(b"\n", b"\\n")
197
.replace(b"\0", b"\\x00"))
172
return b"mandos" + binascii.hexlify(password)
200
174
def encrypt(self, data, password):
201
passphrase = self.password_encode(password)
202
with tempfile.NamedTemporaryFile(
203
dir=self.tempdir) as passfile:
204
passfile.write(passphrase)
206
proc = subprocess.Popen(['gpg', '--symmetric',
210
stdin = subprocess.PIPE,
211
stdout = subprocess.PIPE,
212
stderr = subprocess.PIPE)
213
ciphertext, err = proc.communicate(input = data)
214
if proc.returncode != 0:
175
self.gnupg.passphrase = self.password_encode(password)
176
with open(os.devnull) as devnull:
178
proc = self.gnupg.run(['--symmetric'],
179
create_fhs=['stdin', 'stdout'],
180
attach_fhs={'stderr': devnull})
181
with contextlib.closing(proc.handles['stdin']) as f:
183
with contextlib.closing(proc.handles['stdout']) as f:
184
ciphertext = f.read()
188
self.gnupg.passphrase = None
216
189
return ciphertext
218
191
def decrypt(self, data, password):
219
passphrase = self.password_encode(password)
220
with tempfile.NamedTemporaryFile(
221
dir = self.tempdir) as passfile:
222
passfile.write(passphrase)
224
proc = subprocess.Popen(['gpg', '--decrypt',
228
stdin = subprocess.PIPE,
229
stdout = subprocess.PIPE,
230
stderr = subprocess.PIPE)
231
decrypted_plaintext, err = proc.communicate(input = data)
232
if proc.returncode != 0:
192
self.gnupg.passphrase = self.password_encode(password)
193
with open(os.devnull) as devnull:
195
proc = self.gnupg.run(['--decrypt'],
196
create_fhs=['stdin', 'stdout'],
197
attach_fhs={'stderr': devnull})
198
with contextlib.closing(proc.handles['stdin'] ) as f:
200
with contextlib.closing(proc.handles['stdout']) as f:
201
decrypted_plaintext = f.read()
205
self.gnupg.passphrase = None
234
206
return decrypted_plaintext
237
210
class AvahiError(Exception):
238
211
def __init__(self, value, *args, **kwargs):
239
212
self.value = value
240
return super(AvahiError, self).__init__(value, *args,
213
super(AvahiError, self).__init__(value, *args, **kwargs)
214
def __unicode__(self):
215
return unicode(repr(self.value))
244
217
class AvahiServiceError(AvahiError):
248
220
class AvahiGroupError(AvahiError):
422
364
follow_name_owner_changes=True),
423
365
avahi.DBUS_INTERFACE_SERVER)
424
366
self.server.connect_to_signal("StateChanged",
425
self.server_state_changed)
367
self.server_state_changed)
426
368
self.server_state_changed(self.server.GetState())
429
370
class AvahiServiceToSyslog(AvahiService):
430
def rename(self, *args, **kwargs):
431
372
"""Add the new name to the syslog messages"""
432
ret = AvahiService.rename(self, *args, **kwargs)
433
syslogger.setFormatter(logging.Formatter(
434
'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'
438
def call_pipe(connection, # : multiprocessing.Connection
439
func, *args, **kwargs):
440
"""This function is meant to be called by multiprocessing.Process
442
This function runs func(*args, **kwargs), and writes the resulting
443
return value on the provided multiprocessing.Connection.
445
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))
448
386
class Client(object):
449
387
"""A representation of a client host served by this server.
452
approved: bool(); 'None' if not yet approved/disapproved
390
_approved: bool(); 'None' if not yet approved/disapproved
453
391
approval_delay: datetime.timedelta(); Time to wait for approval
454
392
approval_duration: datetime.timedelta(); Duration of one approval
455
393
checker: subprocess.Popen(); a running checker process used
473
411
interval: datetime.timedelta(); How often to start a new checker
474
412
last_approval_request: datetime.datetime(); (UTC) or None
475
413
last_checked_ok: datetime.datetime(); (UTC) or None
476
415
last_checker_status: integer between 0 and 255 reflecting exit
477
416
status of last checker. -1 reflects crashed
478
checker, -2 means no checker completed yet.
479
last_checker_signal: The signal which killed the last checker, if
480
last_checker_status is -1
481
last_enabled: datetime.datetime(); (UTC) or None
418
last_enabled: datetime.datetime(); (UTC)
482
419
name: string; from the config file, used in log messages and
483
420
D-Bus identifiers
484
421
secret: bytestring; sent verbatim (over TLS) to client
485
422
timeout: datetime.timedelta(); How long from last_checked_ok
486
423
until this client is disabled
487
extended_timeout: extra long timeout when secret has been sent
424
extended_timeout: extra long timeout when password has been sent
488
425
runtime_expansions: Allowed attributes for runtime expansion.
489
426
expires: datetime.datetime(); time (UTC) when a client will be
490
427
disabled, or None
491
server_settings: The server_settings dict from main()
494
430
runtime_expansions = ("approval_delay", "approval_duration",
495
"created", "enabled", "expires",
496
"fingerprint", "host", "interval",
497
"last_approval_request", "last_checked_ok",
431
"created", "enabled", "fingerprint",
432
"host", "interval", "last_checked_ok",
498
433
"last_enabled", "name", "timeout")
501
"extended_timeout": "PT15M",
503
"checker": "fping -q -- %%(host)s",
505
"approval_delay": "PT0S",
506
"approval_duration": "PT1S",
507
"approved_by_default": "True",
512
def config_parser(config):
513
"""Construct a new dict of client settings of this form:
514
{ client_name: {setting_name: value, ...}, ...}
515
with exceptions for any special settings as defined above.
516
NOTE: Must be a pure function. Must return the same result
517
value given the same arguments.
520
for client_name in config.sections():
521
section = dict(config.items(client_name))
522
client = settings[client_name] = {}
524
client["host"] = section["host"]
525
# Reformat values from string types to Python types
526
client["approved_by_default"] = config.getboolean(
527
client_name, "approved_by_default")
528
client["enabled"] = config.getboolean(client_name,
531
# Uppercase and remove spaces from fingerprint for later
532
# comparison purposes with return value from the
533
# fingerprint() function
534
client["fingerprint"] = (section["fingerprint"].upper()
536
if "secret" in section:
537
client["secret"] = section["secret"].decode("base64")
538
elif "secfile" in section:
539
with open(os.path.expanduser(os.path.expandvars
540
(section["secfile"])),
542
client["secret"] = secfile.read()
544
raise TypeError("No secret or secfile for section {}"
546
client["timeout"] = string_to_delta(section["timeout"])
547
client["extended_timeout"] = string_to_delta(
548
section["extended_timeout"])
549
client["interval"] = string_to_delta(section["interval"])
550
client["approval_delay"] = string_to_delta(
551
section["approval_delay"])
552
client["approval_duration"] = string_to_delta(
553
section["approval_duration"])
554
client["checker_command"] = section["checker"]
555
client["last_approval_request"] = None
556
client["last_checked_ok"] = None
557
client["last_checker_status"] = -2
561
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'
563
if server_settings is None:
565
self.server_settings = server_settings
566
# adding all client settings
567
for setting, value in settings.items():
568
setattr(self, setting, value)
571
if not hasattr(self, "last_enabled"):
572
self.last_enabled = datetime.datetime.utcnow()
573
if not hasattr(self, "expires"):
574
self.expires = (datetime.datetime.utcnow()
577
self.last_enabled = None
580
457
logger.debug("Creating client %r", self.name)
458
# Uppercase and remove spaces from fingerprint for later
459
# comparison purposes with return value from the fingerprint()
461
self.fingerprint = (config["fingerprint"].upper()
581
463
logger.debug(" Fingerprint: %s", self.fingerprint)
582
self.created = settings.get("created",
583
datetime.datetime.utcnow())
585
# 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"])
586
485
self.checker = None
587
486
self.checker_initiator_tag = None
588
487
self.disable_initiator_tag = None
488
self.expires = datetime.datetime.utcnow() + self.timeout
589
489
self.checker_callback_tag = None
490
self.checker_command = config["checker"]
590
491
self.current_checker_command = None
492
self._approved = None
493
self.approved_by_default = config.get("approved_by_default",
592
495
self.approvals_pending = 0
593
self.changedstate = multiprocessing_manager.Condition(
594
multiprocessing_manager.Lock())
595
self.client_structure = [attr
596
for attr in self.__dict__.iterkeys()
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()
597
505
if not attr.startswith("_")]
598
506
self.client_structure.append("client_structure")
600
for name, t in inspect.getmembers(
601
type(self), lambda obj: isinstance(obj, property)):
508
for name, t in inspect.getmembers(type(self),
602
512
if not name.startswith("_"):
603
513
self.client_structure.append(name)
644
554
def init_checker(self):
645
555
# Schedule a new checker to be started an 'interval' from now,
646
556
# and every interval from then on.
647
if self.checker_initiator_tag is not None:
648
gobject.source_remove(self.checker_initiator_tag)
649
self.checker_initiator_tag = gobject.timeout_add(
650
int(self.interval.total_seconds() * 1000),
557
self.checker_initiator_tag = (gobject.timeout_add
558
(self.interval_milliseconds(),
652
560
# Schedule a disable() when 'timeout' has passed
653
if self.disable_initiator_tag is not None:
654
gobject.source_remove(self.disable_initiator_tag)
655
self.disable_initiator_tag = gobject.timeout_add(
656
int(self.timeout.total_seconds() * 1000), self.disable)
561
self.disable_initiator_tag = (gobject.timeout_add
562
(self.timeout_milliseconds(),
657
564
# Also start a new checker *right now*.
658
565
self.start_checker()
660
def checker_callback(self, source, condition, connection,
567
def checker_callback(self, pid, condition, command):
662
568
"""The checker has completed, so take appropriate actions."""
663
569
self.checker_callback_tag = None
664
570
self.checker = None
665
# Read return code from connection (see call_pipe)
666
returncode = connection.recv()
670
self.last_checker_status = returncode
671
self.last_checker_signal = None
571
if os.WIFEXITED(condition):
572
self.last_checker_status = os.WEXITSTATUS(condition)
672
573
if self.last_checker_status == 0:
673
574
logger.info("Checker for %(name)s succeeded",
675
576
self.checked_ok()
677
logger.info("Checker for %(name)s failed", vars(self))
578
logger.info("Checker for %(name)s failed",
679
581
self.last_checker_status = -1
680
self.last_checker_signal = -returncode
681
582
logger.warning("Checker for %(name)s crashed?",
685
def checked_ok(self):
686
"""Assert that the client has been seen, alive and well."""
687
self.last_checked_ok = datetime.datetime.utcnow()
688
self.last_checker_status = 0
689
self.last_checker_signal = None
692
def bump_timeout(self, timeout=None):
693
"""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,
694
591
if timeout is None:
695
592
timeout = self.timeout
593
self.last_checked_ok = datetime.datetime.utcnow()
696
594
if self.disable_initiator_tag is not None:
697
595
gobject.source_remove(self.disable_initiator_tag)
698
self.disable_initiator_tag = None
699
596
if getattr(self, "enabled", False):
700
self.disable_initiator_tag = gobject.timeout_add(
701
int(timeout.total_seconds() * 1000), self.disable)
597
self.disable_initiator_tag = (gobject.timeout_add
598
(_timedelta_to_milliseconds
599
(timeout), self.disable))
702
600
self.expires = datetime.datetime.utcnow() + timeout
704
602
def need_approval(self):
710
608
If a checker already exists, leave it running and do
712
610
# The reason for not killing a running checker is that if we
713
# did that, and if a checker (for some reason) started running
714
# slowly and taking more than 'interval' time, then the client
715
# would inevitably timeout, since no checker would get a
716
# 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
717
615
# checkers alone, the checker would have to take more time
718
616
# than 'timeout' for the client to be disabled, which is as it
721
if self.checker is not None and not self.checker.is_alive():
722
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)
725
632
# Start a new checker if needed
726
633
if self.checker is None:
727
# Escape attributes for the shell
729
attr: re.escape(str(getattr(self, attr)))
730
for attr in self.runtime_expansions }
732
command = self.checker_command % escaped_attrs
733
except TypeError as error:
734
logger.error('Could not format string "%s"',
735
self.checker_command,
737
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
738
653
self.current_checker_command = command
739
logger.info("Starting checker %r for %s", command,
741
# We don't need to redirect stdout and stderr, since
742
# in normal mode, that is already done by daemon(),
743
# and in debug mode we don't want to. (Stdin is
744
# always replaced by /dev/null.)
745
# The exception is when not debugging but nevertheless
746
# running in the foreground; use the previously
748
popen_args = { "close_fds": True,
751
if (not self.server_settings["debug"]
752
and self.server_settings["foreground"]):
753
popen_args.update({"stdout": wnull,
755
pipe = multiprocessing.Pipe(duplex = False)
756
self.checker = multiprocessing.Process(
758
args = (pipe[1], subprocess.call, command),
761
self.checker_callback_tag = gobject.io_add_watch(
762
pipe[0].fileno(), gobject.IO_IN,
763
self.checker_callback, pipe[0], command)
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",
764
677
# Re-run this periodically if run by gobject.timeout_add
881
def _is_dbus_thing(thing):
882
"""Returns a function testing if an attribute is a D-Bus thing
884
If called like _is_dbus_thing("method") it returns a function
885
suitable for use as predicate to inspect.getmembers().
887
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
757
def _is_dbus_property(obj):
758
return getattr(obj, "_dbus_is_property", False)
890
def _get_all_dbus_things(self, thing):
760
def _get_all_dbus_properties(self):
891
761
"""Returns a generator of (name, attribute) pairs
893
return ((getattr(athing.__get__(self), "_dbus_name", name),
894
athing.__get__(self))
763
return ((prop.__get__(self)._dbus_name, prop.__get__(self))
895
764
for cls in self.__class__.__mro__
897
inspect.getmembers(cls, self._is_dbus_thing(thing)))
766
inspect.getmembers(cls, self._is_dbus_property))
899
768
def _get_dbus_property(self, interface_name, property_name):
900
769
"""Returns a bound method if one exists which is a D-Bus
901
770
property with the specified name and interface.
903
for cls in self.__class__.__mro__:
904
for name, value in inspect.getmembers(
905
cls, self._is_dbus_thing("property")):
772
for cls in self.__class__.__mro__:
773
for name, value in (inspect.getmembers
774
(cls, self._is_dbus_property)):
906
775
if (value._dbus_name == property_name
907
776
and value._dbus_interface == interface_name):
908
777
return value.__get__(self)
910
779
# No such property
911
raise DBusPropertyNotFound("{}:{}.{}".format(
912
self.dbus_object_path, interface_name, property_name))
780
raise DBusPropertyNotFound(self.dbus_object_path + ":"
781
+ interface_name + "."
914
@dbus.service.method(dbus.PROPERTIES_IFACE,
784
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
916
785
out_signature="v")
917
786
def Get(self, interface_name, property_name):
918
787
"""Standard D-Bus property Get() method, see D-Bus standard.
965
831
if not hasattr(value, "variant_level"):
966
832
properties[name] = value
968
properties[name] = type(value)(
969
value, variant_level = value.variant_level + 1)
834
properties[name] = type(value)(value, variant_level=
835
value.variant_level+1)
970
836
return dbus.Dictionary(properties, signature="sv")
972
@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
973
def PropertiesChanged(self, interface_name, changed_properties,
974
invalidated_properties):
975
"""Standard D-Bus PropertiesChanged() signal, see D-Bus
980
838
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
981
839
out_signature="s",
982
840
path_keyword='object_path',
983
841
connection_keyword='connection')
984
842
def Introspect(self, object_path, connection):
985
"""Overloading of standard D-Bus method.
987
Inserts property tags and interface annotation tags.
843
"""Standard D-Bus method, overloaded to insert property tags.
989
845
xmlstring = dbus.service.Object.Introspect(self, object_path,
992
848
document = xml.dom.minidom.parseString(xmlstring)
994
849
def make_tag(document, name, prop):
995
850
e = document.createElement("property")
996
851
e.setAttribute("name", name)
997
852
e.setAttribute("type", prop._dbus_signature)
998
853
e.setAttribute("access", prop._dbus_access)
1001
855
for if_tag in document.getElementsByTagName("interface"):
1003
856
for tag in (make_tag(document, name, prop)
1005
in self._get_all_dbus_things("property")
858
in self._get_all_dbus_properties()
1006
859
if prop._dbus_interface
1007
860
== if_tag.getAttribute("name")):
1008
861
if_tag.appendChild(tag)
1009
# Add annotation tags
1010
for typ in ("method", "signal", "property"):
1011
for tag in if_tag.getElementsByTagName(typ):
1013
for name, prop in (self.
1014
_get_all_dbus_things(typ)):
1015
if (name == tag.getAttribute("name")
1016
and prop._dbus_interface
1017
== if_tag.getAttribute("name")):
1018
annots.update(getattr(
1019
prop, "_dbus_annotations", {}))
1020
for name, value in annots.items():
1021
ann_tag = document.createElement(
1023
ann_tag.setAttribute("name", name)
1024
ann_tag.setAttribute("value", value)
1025
tag.appendChild(ann_tag)
1026
# Add interface annotation tags
1027
for annotation, value in dict(
1028
itertools.chain.from_iterable(
1029
annotations().items()
1030
for name, annotations
1031
in self._get_all_dbus_things("interface")
1032
if name == if_tag.getAttribute("name")
1034
ann_tag = document.createElement("annotation")
1035
ann_tag.setAttribute("name", annotation)
1036
ann_tag.setAttribute("value", value)
1037
if_tag.appendChild(ann_tag)
1038
862
# Add the names to the return values for the
1039
863
# "org.freedesktop.DBus.Properties" methods
1040
864
if (if_tag.getAttribute("name")
1055
879
except (AttributeError, xml.dom.DOMException,
1056
880
xml.parsers.expat.ExpatError) as error:
1057
881
logger.error("Failed to override Introspection method",
1059
883
return xmlstring
1062
def datetime_to_dbus(dt, variant_level=0):
886
def datetime_to_dbus (dt, variant_level=0):
1063
887
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1065
889
return dbus.String("", variant_level = variant_level)
1066
return dbus.String(dt.isoformat(), variant_level=variant_level)
1069
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1070
"""A class decorator; applied to a subclass of
1071
dbus.service.Object, it will add alternate D-Bus attributes with
1072
interface names according to the "alt_interface_names" mapping.
1075
@alternate_dbus_interfaces({"org.example.Interface":
1076
"net.example.AlternateInterface"})
1077
class SampleDBusObject(dbus.service.Object):
1078
@dbus.service.method("org.example.Interface")
1079
def SampleDBusMethod():
1082
The above "SampleDBusMethod" on "SampleDBusObject" will be
1083
reachable via two interfaces: "org.example.Interface" and
1084
"net.example.AlternateInterface", the latter of which will have
1085
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1086
"true", unless "deprecate" is passed with a False value.
1088
This works for methods and signals, and also for D-Bus properties
1089
(from DBusObjectWithProperties) and interfaces (from the
1090
dbus_interface_annotations decorator).
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.
1094
for orig_interface_name, alt_interface_name in (
1095
alt_interface_names.items()):
1097
interface_names = set()
1098
# Go though all attributes of the class
1099
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):
1100
906
# Ignore non-D-Bus attributes, and D-Bus attributes
1101
907
# with the wrong interface name
1102
908
if (not hasattr(attribute, "_dbus_interface")
1103
or not attribute._dbus_interface.startswith(
1104
orig_interface_name)):
909
or not attribute._dbus_interface
910
.startswith("se.recompile.Mandos")):
1106
912
# Create an alternate D-Bus interface name based on
1107
913
# the current name
1108
alt_interface = attribute._dbus_interface.replace(
1109
orig_interface_name, alt_interface_name)
1110
interface_names.add(alt_interface)
914
alt_interface = (attribute._dbus_interface
915
.replace("se.recompile.Mandos",
916
"se.bsnet.fukt.Mandos"))
1111
917
# Is this a D-Bus signal?
1112
918
if getattr(attribute, "_dbus_is_signal", False):
1113
if sys.version_info.major == 2:
1114
# Extract the original non-method undecorated
1115
# function by black magic
1116
nonmethod_func = (dict(
919
# Extract the original non-method function by
921
nonmethod_func = (dict(
1117
922
zip(attribute.func_code.co_freevars,
1118
attribute.__closure__))
1119
["func"].cell_contents)
1121
nonmethod_func = attribute
923
attribute.__closure__))["func"]
1122
925
# Create a new, but exactly alike, function
1123
926
# object, and decorate it to be a new D-Bus signal
1124
927
# with the alternate D-Bus interface name
1125
if sys.version_info.major == 2:
1126
new_function = types.FunctionType(
1127
nonmethod_func.func_code,
1128
nonmethod_func.func_globals,
1129
nonmethod_func.func_name,
1130
nonmethod_func.func_defaults,
1131
nonmethod_func.func_closure)
1133
new_function = types.FunctionType(
1134
nonmethod_func.__code__,
1135
nonmethod_func.__globals__,
1136
nonmethod_func.__name__,
1137
nonmethod_func.__defaults__,
1138
nonmethod_func.__closure__)
1139
new_function = (dbus.service.signal(
1141
attribute._dbus_signature)(new_function))
1142
# Copy annotations, if any
1144
new_function._dbus_annotations = dict(
1145
attribute._dbus_annotations)
1146
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)))
1148
937
# Define a creator of a function to call both the
1149
# original and alternate functions, so both the
1150
# original and alternate signals gets sent when
1151
# the function is called
938
# old and new functions, so both the old and new
939
# signals gets sent when the function is called
1152
940
def fixscope(func1, func2):
1153
941
"""This function is a scope container to pass
1154
942
func1 and func2 to the "call_both" function
1155
943
outside of its arguments"""
1157
944
def call_both(*args, **kwargs):
1158
945
"""This function will emit two D-Bus
1159
946
signals by calling func1 and func2"""
1160
947
func1(*args, **kwargs)
1161
948
func2(*args, **kwargs)
1163
949
return call_both
1164
950
# Create the "call_both" function and add it to
1166
attr[attrname] = fixscope(attribute, new_function)
952
attr[attrname] = fixscope(attribute,
1167
954
# Is this a D-Bus method?
1168
955
elif getattr(attribute, "_dbus_is_method", False):
1169
956
# Create a new, but exactly alike, function
1170
957
# object. Decorate it to be a new D-Bus method
1171
958
# with the alternate D-Bus interface name. Add it
1174
dbus.service.method(
1176
attribute._dbus_in_signature,
1177
attribute._dbus_out_signature)
1178
(types.FunctionType(attribute.func_code,
1179
attribute.func_globals,
1180
attribute.func_name,
1181
attribute.func_defaults,
1182
attribute.func_closure)))
1183
# Copy annotations, if any
1185
attr[attrname]._dbus_annotations = dict(
1186
attribute._dbus_annotations)
1187
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)))
1189
970
# Is this a D-Bus property?
1190
971
elif getattr(attribute, "_dbus_is_property", False):
1191
972
# Create a new, but exactly alike, function
1192
973
# object, and decorate it to be a new D-Bus
1193
974
# property with the alternate D-Bus interface
1194
975
# name. Add it to the class.
1195
attr[attrname] = (dbus_service_property(
1196
alt_interface, attribute._dbus_signature,
1197
attribute._dbus_access,
1198
attribute._dbus_get_args_options
1200
(types.FunctionType(
1201
attribute.func_code,
1202
attribute.func_globals,
1203
attribute.func_name,
1204
attribute.func_defaults,
1205
attribute.func_closure)))
1206
# Copy annotations, if any
1208
attr[attrname]._dbus_annotations = dict(
1209
attribute._dbus_annotations)
1210
except AttributeError:
1212
# Is this a D-Bus interface?
1213
elif getattr(attribute, "_dbus_is_interface", False):
1214
# Create a new, but exactly alike, function
1215
# object. Decorate it to be a new D-Bus interface
1216
# with the alternate D-Bus interface name. Add it
1219
dbus_interface_annotations(alt_interface)
1220
(types.FunctionType(attribute.func_code,
1221
attribute.func_globals,
1222
attribute.func_name,
1223
attribute.func_defaults,
1224
attribute.func_closure)))
1226
# Deprecate all alternate interfaces
1227
iname="_AlternateDBusNames_interface_annotation{}"
1228
for interface_name in interface_names:
1230
@dbus_interface_annotations(interface_name)
1232
return { "org.freedesktop.DBus.Deprecated":
1234
# Find an unused name
1235
for aname in (iname.format(i)
1236
for i in itertools.count()):
1237
if aname not in attr:
1241
# Replace the class with a new subclass of it with
1242
# methods, signals, etc. as created above.
1243
cls = type(b"{}Alternate".format(cls.__name__),
1250
@alternate_dbus_interfaces({"se.recompile.Mandos":
1251
"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)
1252
992
class ClientDBus(Client, DBusObjectWithProperties):
1253
993
"""A Client class using D-Bus
1325
1053
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1326
1054
last_enabled = notifychangeproperty(datetime_to_dbus,
1328
checker = notifychangeproperty(
1329
dbus.Boolean, "CheckerRunning",
1330
type_func = lambda checker: checker is not None)
1056
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1057
type_func = lambda checker:
1058
checker is not None)
1331
1059
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1332
1060
"LastCheckedOK")
1333
last_checker_status = notifychangeproperty(dbus.Int16,
1334
"LastCheckerStatus")
1335
1061
last_approval_request = notifychangeproperty(
1336
1062
datetime_to_dbus, "LastApprovalRequest")
1337
1063
approved_by_default = notifychangeproperty(dbus.Boolean,
1338
1064
"ApprovedByDefault")
1339
approval_delay = notifychangeproperty(
1340
dbus.UInt64, "ApprovalDelay",
1341
type_func = lambda td: td.total_seconds() * 1000)
1065
approval_delay = notifychangeproperty(dbus.UInt16,
1068
_timedelta_to_milliseconds)
1342
1069
approval_duration = notifychangeproperty(
1343
dbus.UInt64, "ApprovalDuration",
1344
type_func = lambda td: td.total_seconds() * 1000)
1070
dbus.UInt16, "ApprovalDuration",
1071
type_func = _timedelta_to_milliseconds)
1345
1072
host = notifychangeproperty(dbus.String, "Host")
1346
timeout = notifychangeproperty(
1347
dbus.UInt64, "Timeout",
1348
type_func = lambda td: td.total_seconds() * 1000)
1073
timeout = notifychangeproperty(dbus.UInt16, "Timeout",
1075
_timedelta_to_milliseconds)
1349
1076
extended_timeout = notifychangeproperty(
1350
dbus.UInt64, "ExtendedTimeout",
1351
type_func = lambda td: td.total_seconds() * 1000)
1352
interval = notifychangeproperty(
1353
dbus.UInt64, "Interval",
1354
type_func = lambda td: td.total_seconds() * 1000)
1077
dbus.UInt16, "ExtendedTimeout",
1078
type_func = _timedelta_to_milliseconds)
1079
interval = notifychangeproperty(dbus.UInt16,
1082
_timedelta_to_milliseconds)
1355
1083
checker_command = notifychangeproperty(dbus.String, "Checker")
1356
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1357
invalidate_only=True)
1359
1085
del notifychangeproperty
1367
1093
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1368
1094
Client.__del__(self, *args, **kwargs)
1370
def checker_callback(self, source, condition,
1371
connection, command, *args, **kwargs):
1372
ret = Client.checker_callback(self, source, condition,
1373
connection, command, *args,
1375
exitstatus = self.last_checker_status
1096
def checker_callback(self, pid, condition, command,
1098
self.checker_callback_tag = None
1100
if os.WIFEXITED(condition):
1101
exitstatus = os.WEXITSTATUS(condition)
1377
1102
# Emit D-Bus signal
1378
1103
self.CheckerCompleted(dbus.Int16(exitstatus),
1104
dbus.Int64(condition),
1380
1105
dbus.String(command))
1382
1107
# Emit D-Bus signal
1383
1108
self.CheckerCompleted(dbus.Int16(-1),
1385
self.last_checker_signal),
1109
dbus.Int64(condition),
1386
1110
dbus.String(command))
1112
return Client.checker_callback(self, pid, condition, command,
1389
1115
def start_checker(self, *args, **kwargs):
1390
old_checker_pid = getattr(self.checker, "pid", None)
1116
old_checker = self.checker
1117
if self.checker is not None:
1118
old_checker_pid = self.checker.pid
1120
old_checker_pid = None
1391
1121
r = Client.start_checker(self, *args, **kwargs)
1392
1122
# Only if new checker process was started
1393
1123
if (self.checker is not None
1590
1316
return datetime_to_dbus(self.last_approval_request)
1592
1318
# Timeout - property
1593
@dbus_service_property(_interface,
1319
@dbus_service_property(_interface, signature="t",
1595
1320
access="readwrite")
1596
1321
def Timeout_dbus_property(self, value=None):
1597
1322
if value is None: # get
1598
return dbus.UInt64(self.timeout.total_seconds() * 1000)
1599
old_timeout = self.timeout
1323
return dbus.UInt64(self.timeout_milliseconds())
1600
1324
self.timeout = datetime.timedelta(0, 0, 0, value)
1601
# Reschedule disabling
1603
now = datetime.datetime.utcnow()
1604
self.expires += self.timeout - old_timeout
1605
if self.expires <= now:
1606
# The timeout has passed
1609
if (getattr(self, "disable_initiator_tag", None)
1612
gobject.source_remove(self.disable_initiator_tag)
1613
self.disable_initiator_tag = gobject.timeout_add(
1614
int((self.expires - now).total_seconds() * 1000),
1325
if getattr(self, "disable_initiator_tag", None) is None:
1327
# Reschedule timeout
1328
gobject.source_remove(self.disable_initiator_tag)
1329
self.disable_initiator_tag = None
1331
time_to_die = _timedelta_to_milliseconds((self
1336
if time_to_die <= 0:
1337
# The timeout has passed
1340
self.expires = (datetime.datetime.utcnow()
1341
+ datetime.timedelta(milliseconds =
1343
self.disable_initiator_tag = (gobject.timeout_add
1344
(time_to_die, self.disable))
1617
1346
# ExtendedTimeout - property
1618
@dbus_service_property(_interface,
1347
@dbus_service_property(_interface, signature="t",
1620
1348
access="readwrite")
1621
1349
def ExtendedTimeout_dbus_property(self, value=None):
1622
1350
if value is None: # get
1623
return dbus.UInt64(self.extended_timeout.total_seconds()
1351
return dbus.UInt64(self.extended_timeout_milliseconds())
1625
1352
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1627
1354
# Interval - property
1628
@dbus_service_property(_interface,
1355
@dbus_service_property(_interface, signature="t",
1630
1356
access="readwrite")
1631
1357
def Interval_dbus_property(self, value=None):
1632
1358
if value is None: # get
1633
return dbus.UInt64(self.interval.total_seconds() * 1000)
1359
return dbus.UInt64(self.interval_milliseconds())
1634
1360
self.interval = datetime.timedelta(0, 0, 0, value)
1635
1361
if getattr(self, "checker_initiator_tag", None) is None:
1638
# Reschedule checker run
1639
gobject.source_remove(self.checker_initiator_tag)
1640
self.checker_initiator_tag = gobject.timeout_add(
1641
value, self.start_checker)
1642
self.start_checker() # Start one now, too
1363
# Reschedule checker run
1364
gobject.source_remove(self.checker_initiator_tag)
1365
self.checker_initiator_tag = (gobject.timeout_add
1366
(value, self.start_checker))
1367
self.start_checker() # Start one now, too
1644
1369
# Checker - property
1645
@dbus_service_property(_interface,
1370
@dbus_service_property(_interface, signature="s",
1647
1371
access="readwrite")
1648
1372
def Checker_dbus_property(self, value=None):
1649
1373
if value is None: # get
1650
1374
return dbus.String(self.checker_command)
1651
self.checker_command = str(value)
1375
self.checker_command = value
1653
1377
# CheckerRunning - property
1654
@dbus_service_property(_interface,
1378
@dbus_service_property(_interface, signature="b",
1656
1379
access="readwrite")
1657
1380
def CheckerRunning_dbus_property(self, value=None):
1658
1381
if value is None: # get
1883
1612
def fingerprint(openpgp):
1884
1613
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1885
1614
# New GnuTLS "datum" with the OpenPGP public key
1886
datum = gnutls.library.types.gnutls_datum_t(
1887
ctypes.cast(ctypes.c_char_p(openpgp),
1888
ctypes.POINTER(ctypes.c_ubyte)),
1889
ctypes.c_uint(len(openpgp)))
1615
datum = (gnutls.library.types
1616
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1619
ctypes.c_uint(len(openpgp))))
1890
1620
# New empty GnuTLS certificate
1891
1621
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1892
gnutls.library.functions.gnutls_openpgp_crt_init(
1622
(gnutls.library.functions
1623
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1894
1624
# Import the OpenPGP public key into the certificate
1895
gnutls.library.functions.gnutls_openpgp_crt_import(
1896
crt, ctypes.byref(datum),
1897
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
1625
(gnutls.library.functions
1626
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1627
gnutls.library.constants
1628
.GNUTLS_OPENPGP_FMT_RAW))
1898
1629
# Verify the self signature in the key
1899
1630
crtverify = ctypes.c_uint()
1900
gnutls.library.functions.gnutls_openpgp_crt_verify_self(
1901
crt, 0, ctypes.byref(crtverify))
1631
(gnutls.library.functions
1632
.gnutls_openpgp_crt_verify_self(crt, 0,
1633
ctypes.byref(crtverify)))
1902
1634
if crtverify.value != 0:
1903
1635
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1904
raise gnutls.errors.CertificateSecurityError(
1636
raise (gnutls.errors.CertificateSecurityError
1906
1638
# New buffer for the fingerprint
1907
1639
buf = ctypes.create_string_buffer(20)
1908
1640
buf_len = ctypes.c_size_t()
1909
1641
# Get the fingerprint from the certificate into the buffer
1910
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint(
1911
crt, ctypes.byref(buf), ctypes.byref(buf_len))
1642
(gnutls.library.functions
1643
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1644
ctypes.byref(buf_len)))
1912
1645
# Deinit the certificate
1913
1646
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1914
1647
# Convert the buffer to a Python bytestring
1965
1697
interface: None or a network interface name (string)
1966
1698
use_ipv6: Boolean; to use IPv6 or not
1969
1700
def __init__(self, server_address, RequestHandlerClass,
1973
"""If socketfd is set, use that file descriptor instead of
1974
creating a new one with socket.socket().
1701
interface=None, use_ipv6=True):
1976
1702
self.interface = interface
1978
1704
self.address_family = socket.AF_INET6
1979
if socketfd is not None:
1980
# Save the file descriptor
1981
self.socketfd = socketfd
1982
# Save the original socket.socket() function
1983
self.socket_socket = socket.socket
1984
# To implement --socket, we monkey patch socket.socket.
1986
# (When socketserver.TCPServer is a new-style class, we
1987
# could make self.socket into a property instead of monkey
1988
# patching socket.socket.)
1990
# Create a one-time-only replacement for socket.socket()
1991
@functools.wraps(socket.socket)
1992
def socket_wrapper(*args, **kwargs):
1993
# Restore original function so subsequent calls are
1995
socket.socket = self.socket_socket
1996
del self.socket_socket
1997
# This time only, return a new socket object from the
1998
# saved file descriptor.
1999
return socket.fromfd(self.socketfd, *args, **kwargs)
2000
# Replace socket.socket() function with wrapper
2001
socket.socket = socket_wrapper
2002
# The socketserver.TCPServer.__init__ will call
2003
# socket.socket(), which might be our replacement,
2004
# socket_wrapper(), if socketfd was set.
2005
1705
socketserver.TCPServer.__init__(self, server_address,
2006
1706
RequestHandlerClass)
2008
1707
def server_bind(self):
2009
1708
"""This overrides the normal server_bind() function
2010
1709
to bind to an interface if one was specified, and also NOT to
2170
def rfc3339_duration_to_delta(duration):
2171
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2173
>>> rfc3339_duration_to_delta("P7D")
2174
datetime.timedelta(7)
2175
>>> rfc3339_duration_to_delta("PT60S")
2176
datetime.timedelta(0, 60)
2177
>>> rfc3339_duration_to_delta("PT60M")
2178
datetime.timedelta(0, 3600)
2179
>>> rfc3339_duration_to_delta("PT24H")
2180
datetime.timedelta(1)
2181
>>> rfc3339_duration_to_delta("P1W")
2182
datetime.timedelta(7)
2183
>>> rfc3339_duration_to_delta("PT5M30S")
2184
datetime.timedelta(0, 330)
2185
>>> rfc3339_duration_to_delta("P1DT3M20S")
2186
datetime.timedelta(1, 200)
2189
# Parsing an RFC 3339 duration with regular expressions is not
2190
# possible - there would have to be multiple places for the same
2191
# values, like seconds. The current code, while more esoteric, is
2192
# cleaner without depending on a parsing library. If Python had a
2193
# built-in library for parsing we would use it, but we'd like to
2194
# avoid excessive use of external libraries.
2196
# New type for defining tokens, syntax, and semantics all-in-one
2197
Token = collections.namedtuple("Token", (
2198
"regexp", # To match token; if "value" is not None, must have
2199
# a "group" containing digits
2200
"value", # datetime.timedelta or None
2201
"followers")) # Tokens valid after this token
2202
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2203
# the "duration" ABNF definition in RFC 3339, Appendix A.
2204
token_end = Token(re.compile(r"$"), None, frozenset())
2205
token_second = Token(re.compile(r"(\d+)S"),
2206
datetime.timedelta(seconds=1),
2207
frozenset((token_end, )))
2208
token_minute = Token(re.compile(r"(\d+)M"),
2209
datetime.timedelta(minutes=1),
2210
frozenset((token_second, token_end)))
2211
token_hour = Token(re.compile(r"(\d+)H"),
2212
datetime.timedelta(hours=1),
2213
frozenset((token_minute, token_end)))
2214
token_time = Token(re.compile(r"T"),
2216
frozenset((token_hour, token_minute,
2218
token_day = Token(re.compile(r"(\d+)D"),
2219
datetime.timedelta(days=1),
2220
frozenset((token_time, token_end)))
2221
token_month = Token(re.compile(r"(\d+)M"),
2222
datetime.timedelta(weeks=4),
2223
frozenset((token_day, token_end)))
2224
token_year = Token(re.compile(r"(\d+)Y"),
2225
datetime.timedelta(weeks=52),
2226
frozenset((token_month, token_end)))
2227
token_week = Token(re.compile(r"(\d+)W"),
2228
datetime.timedelta(weeks=1),
2229
frozenset((token_end, )))
2230
token_duration = Token(re.compile(r"P"), None,
2231
frozenset((token_year, token_month,
2232
token_day, token_time,
2234
# Define starting values
2235
value = datetime.timedelta() # Value so far
2237
followers = frozenset((token_duration, )) # Following valid tokens
2238
s = duration # String left to parse
2239
# Loop until end token is found
2240
while found_token is not token_end:
2241
# Search for any currently valid tokens
2242
for token in followers:
2243
match = token.regexp.match(s)
2244
if match is not None:
2246
if token.value is not None:
2247
# Value found, parse digits
2248
factor = int(match.group(1), 10)
2249
# Add to value so far
2250
value += factor * token.value
2251
# Strip token from string
2252
s = token.regexp.sub("", s, 1)
2255
# Set valid next tokens
2256
followers = found_token.followers
2259
# No currently valid tokens were found
2260
raise ValueError("Invalid RFC 3339 duration: {!r}"
2266
1874
def string_to_delta(interval):
2267
1875
"""Parse a string and return a datetime.timedelta
2397
1990
"debug": "False",
2399
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2400
":+SIGN-RSA-SHA224:+SIGN-RSA-RMD160",
1992
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2401
1993
"servicename": "Mandos",
2402
1994
"use_dbus": "True",
2403
1995
"use_ipv6": "True",
2404
1996
"debuglevel": "",
2405
1997
"restore": "True",
2407
"statedir": "/var/lib/mandos",
2408
"foreground": "False",
1998
"statedir": "/var/lib/mandos"
2412
2001
# Parse config file for server-global settings
2413
2002
server_config = configparser.SafeConfigParser(server_defaults)
2414
2003
del server_defaults
2415
server_config.read(os.path.join(options.configdir, "mandos.conf"))
2004
server_config.read(os.path.join(options.configdir,
2416
2006
# Convert the SafeConfigParser object to a dict
2417
2007
server_settings = server_config.defaults()
2418
2008
# Use the appropriate methods on the non-string config options
2419
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
2009
for option in ("debug", "use_dbus", "use_ipv6"):
2420
2010
server_settings[option] = server_config.getboolean("DEFAULT",
2422
2012
if server_settings["port"]:
2423
2013
server_settings["port"] = server_config.getint("DEFAULT",
2425
if server_settings["socket"]:
2426
server_settings["socket"] = server_config.getint("DEFAULT",
2428
# Later, stdin will, and stdout and stderr might, be dup'ed
2429
# over with an opened os.devnull. But we don't want this to
2430
# happen with a supplied network socket.
2431
if 0 <= server_settings["socket"] <= 2:
2432
server_settings["socket"] = os.dup(server_settings
2434
2015
del server_config
2436
2017
# Override the settings from the config file with command line
2437
2018
# options, if set.
2438
2019
for option in ("interface", "address", "port", "debug",
2439
"priority", "servicename", "configdir", "use_dbus",
2440
"use_ipv6", "debuglevel", "restore", "statedir",
2441
"socket", "foreground", "zeroconf"):
2020
"priority", "servicename", "configdir",
2021
"use_dbus", "use_ipv6", "debuglevel", "restore",
2442
2023
value = getattr(options, option)
2443
2024
if value is not None:
2444
2025
server_settings[option] = value
2446
2027
# Force all strings to be unicode
2447
2028
for option in server_settings.keys():
2448
if isinstance(server_settings[option], bytes):
2449
server_settings[option] = (server_settings[option]
2451
# Force all boolean options to be boolean
2452
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2453
"foreground", "zeroconf"):
2454
server_settings[option] = bool(server_settings[option])
2455
# Debug implies foreground
2456
if server_settings["debug"]:
2457
server_settings["foreground"] = True
2029
if type(server_settings[option]) is str:
2030
server_settings[option] = unicode(server_settings[option])
2458
2031
# Now we have our good server settings in "server_settings"
2460
2033
##################################################################
2462
if (not server_settings["zeroconf"]
2463
and not (server_settings["port"]
2464
or server_settings["socket"] != "")):
2465
parser.error("Needs port or socket to work without Zeroconf")
2467
2035
# For convenience
2468
2036
debug = server_settings["debug"]
2469
2037
debuglevel = server_settings["debuglevel"]
2471
2039
use_ipv6 = server_settings["use_ipv6"]
2472
2040
stored_state_path = os.path.join(server_settings["statedir"],
2473
2041
stored_state_file)
2474
foreground = server_settings["foreground"]
2475
zeroconf = server_settings["zeroconf"]
2478
initlogger(debug, logging.DEBUG)
2044
initlogger(logging.DEBUG)
2480
2046
if not debuglevel:
2483
2049
level = getattr(logging, debuglevel.upper())
2484
initlogger(debug, level)
2486
2052
if server_settings["servicename"] != "Mandos":
2487
syslogger.setFormatter(
2488
logging.Formatter('Mandos ({}) [%(process)d]:'
2489
' %(levelname)s: %(message)s'.format(
2490
server_settings["servicename"])))
2053
syslogger.setFormatter(logging.Formatter
2054
('Mandos (%s) [%%(process)d]:'
2055
' %%(levelname)s: %%(message)s'
2056
% server_settings["servicename"]))
2492
2058
# Parse config file with clients
2493
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)
2495
2068
client_config.read(os.path.join(server_settings["configdir"],
2496
2069
"clients.conf"))
2498
2071
global mandos_dbus_service
2499
2072
mandos_dbus_service = None
2502
if server_settings["socket"] != "":
2503
socketfd = server_settings["socket"]
2504
tcp_server = MandosServer(
2505
(server_settings["address"], server_settings["port"]),
2507
interface=(server_settings["interface"] or None),
2509
gnutls_priority=server_settings["priority"],
2513
pidfilename = "/run/mandos.pid"
2514
if not os.path.isdir("/run/."):
2515
pidfilename = "/var/run/mandos.pid"
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"
2518
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
2519
except IOError as e:
2520
logger.error("Could not open file %r", pidfilename,
2086
pidfile = open(pidfilename, "w")
2088
logger.error("Could not open file %r", pidfilename)
2523
for name in ("_mandos", "mandos", "nobody"):
2091
uid = pwd.getpwnam("_mandos").pw_uid
2092
gid = pwd.getpwnam("_mandos").pw_gid
2525
uid = pwd.getpwnam(name).pw_uid
2526
gid = pwd.getpwnam(name).pw_gid
2095
uid = pwd.getpwnam("mandos").pw_uid
2096
gid = pwd.getpwnam("mandos").pw_gid
2528
2097
except KeyError:
2099
uid = pwd.getpwnam("nobody").pw_uid
2100
gid = pwd.getpwnam("nobody").pw_gid
2536
2107
except OSError as error:
2537
if error.errno != errno.EPERM:
2108
if error[0] != errno.EPERM:
2541
2112
# Enable all possible GnuTLS debugging
2548
2119
def debug_gnutls(level, string):
2549
2120
logger.debug("GnuTLS: %s", string[:-1])
2551
gnutls.library.functions.gnutls_global_set_log_function(
2122
(gnutls.library.functions
2123
.gnutls_global_set_log_function(debug_gnutls))
2554
2125
# Redirect stdin so all checkers get /dev/null
2555
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2126
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2556
2127
os.dup2(null, sys.stdin.fileno())
2131
# No console logging
2132
logger.removeHandler(console)
2560
2134
# Need to fork before connecting to D-Bus
2562
2136
# Close all input and output, do double fork, etc.
2565
# multiprocessing will use threads, so before we use gobject we
2566
# need to inform gobject that threads will be used.
2567
gobject.threads_init()
2569
2139
global main_loop
2570
2140
# From the Avahi example code
2571
DBusGMainLoop(set_as_default=True)
2141
DBusGMainLoop(set_as_default=True )
2572
2142
main_loop = gobject.MainLoop()
2573
2143
bus = dbus.SystemBus()
2574
2144
# End of Avahi example code
2577
2147
bus_name = dbus.service.BusName("se.recompile.Mandos",
2580
old_bus_name = dbus.service.BusName(
2581
"se.bsnet.fukt.Mandos", bus,
2583
except dbus.exceptions.DBusException as e:
2584
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")
2585
2154
use_dbus = False
2586
2155
server_settings["use_dbus"] = False
2587
2156
tcp_server.use_dbus = False
2589
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2590
service = AvahiServiceToSyslog(
2591
name = server_settings["servicename"],
2592
servicetype = "_mandos._tcp",
2593
protocol = protocol,
2595
if server_settings["interface"]:
2596
service.interface = if_nametoindex(
2597
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"])))
2599
2166
global multiprocessing_manager
2600
2167
multiprocessing_manager = multiprocessing.Manager()
2602
2169
client_class = Client
2604
client_class = functools.partial(ClientDBus, bus = bus)
2606
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())
2607
2194
old_client_settings = {}
2610
# This is used to redirect stdout and stderr for checker processes
2612
wnull = open(os.devnull, "w") # A writable /dev/null
2613
# Only used if server is running in foreground but not in debug
2615
if debug or not foreground:
2618
2197
# Get client data and settings from last running state.
2619
2198
if server_settings["restore"]:
2621
2200
with open(stored_state_path, "rb") as stored_state:
2622
clients_data, old_client_settings = pickle.load(
2201
clients_data, old_client_settings = (pickle.load
2624
2203
os.remove(stored_state_path)
2625
2204
except IOError as e:
2626
if e.errno == errno.ENOENT:
2627
logger.warning("Could not load persistent state:"
2628
" {}".format(os.strerror(e.errno)))
2630
logger.critical("Could not load persistent state:",
2205
logger.warning("Could not load persistent state: {0}"
2207
if e.errno != errno.ENOENT:
2633
except EOFError as e:
2634
logger.warning("Could not load persistent state: "
2638
with PGPEngine() as pgp:
2639
for client_name, client in clients_data.items():
2640
# Skip removed clients
2641
if client_name not in client_settings:
2210
with Crypto() as crypt:
2211
for client in clients_data:
2212
client_name = client["name"]
2644
2214
# Decide which value to use after restoring saved state.
2645
2215
# We have three different values: Old config file,
2651
2221
# For each value in new config, check if it
2652
2222
# differs from the old config value (Except for
2653
2223
# the "secret" attribute)
2654
if (name != "secret"
2656
old_client_settings[client_name][name])):
2657
client[name] = value
2224
if (name != "secret" and
2225
value != old_client_settings[client_name]
2227
setattr(client, name, value)
2658
2228
except KeyError:
2661
2231
# Clients who has passed its expire date can still be
2662
# enabled if its last checker was successful. A Client
2663
# whose checker succeeded before we stored its state is
2664
# assumed to have successfully run all checkers during
2666
if client["enabled"]:
2667
if datetime.datetime.utcnow() >= client["expires"]:
2668
if not client["last_checked_ok"]:
2670
"disabling client {} - Client never "
2671
"performed a successful checker".format(
2673
client["enabled"] = False
2674
elif client["last_checker_status"] != 0:
2676
"disabling client {} - Client last"
2677
" checker failed with error code"
2680
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:
2681
2240
client["enabled"] = False
2683
client["expires"] = (
2684
datetime.datetime.utcnow()
2685
+ client["timeout"])
2686
logger.debug("Last checker succeeded,"
2687
" 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],
2690
client["secret"] = pgp.decrypt(
2691
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 = (
2692
2283
client_settings[client_name]["secret"])
2694
# If decryption fails, we use secret from new settings
2695
logger.debug("Failed to decrypt {} old secret".format(
2697
client["secret"] = (client_settings[client_name]
2700
# Add/remove clients based on new changes made to config
2701
for client_name in (set(old_client_settings)
2702
- set(client_settings)):
2703
del clients_data[client_name]
2704
for client_name in (set(client_settings)
2705
- set(old_client_settings)):
2706
clients_data[client_name] = client_settings[client_name]
2708
# Create all client objects
2709
for client_name, client in clients_data.items():
2710
tcp_server.clients[client_name] = client_class(
2713
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
2715
2295
if not tcp_server.clients:
2716
2296
logger.warning("No clients defined")
2719
if pidfile is not None:
2723
print(pid, file=pidfile)
2725
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
2728
2310
del pidfilename
2312
signal.signal(signal.SIGINT, signal.SIG_IGN)
2730
2314
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2731
2315
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2735
@alternate_dbus_interfaces(
2736
{ "se.recompile.Mandos": "se.bsnet.fukt.Mandos" })
2737
class MandosDBusService(DBusObjectWithProperties):
2318
class MandosDBusService(dbus.service.Object):
2738
2319
"""A D-Bus proxy object"""
2740
2320
def __init__(self):
2741
2321
dbus.service.Object.__init__(self, bus, "/")
2743
2322
_interface = "se.recompile.Mandos"
2745
@dbus_interface_annotations(_interface)
2748
"org.freedesktop.DBus.Property.EmitsChangedSignal":
2751
2324
@dbus.service.signal(_interface, signature="o")
2752
2325
def ClientAdded(self, objpath):