85
101
except ImportError:
86
102
SO_BINDTODEVICE = None
104
if sys.version_info.major == 2:
90
108
stored_state_file = "clients.pickle"
92
110
logger = logging.getLogger()
93
syslogger = (logging.handlers.SysLogHandler
94
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
95
address = str("/dev/log")))
98
if_nametoindex = (ctypes.cdll.LoadLibrary
99
(ctypes.util.find_library("c"))
114
if_nametoindex = ctypes.cdll.LoadLibrary(
115
ctypes.util.find_library("c")).if_nametoindex
101
116
except (OSError, AttributeError):
102
118
def if_nametoindex(interface):
103
119
"Get an interface index the hard way, i.e. using fcntl()"
104
120
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
105
121
with contextlib.closing(socket.socket()) as s:
106
122
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
107
struct.pack(str("16s16x"),
109
interface_index = struct.unpack(str("I"),
123
struct.pack(b"16s16x", interface))
124
interface_index = struct.unpack("I", ifreq[16:20])[0]
111
125
return interface_index
114
def initlogger(level=logging.WARNING):
128
def initlogger(debug, level=logging.WARNING):
115
129
"""init logger and add loglevel"""
132
syslogger = (logging.handlers.SysLogHandler(
133
facility = logging.handlers.SysLogHandler.LOG_DAEMON,
134
address = "/dev/log"))
117
135
syslogger.setFormatter(logging.Formatter
118
136
('Mandos [%(process)d]: %(levelname)s:'
120
138
logger.addHandler(syslogger)
122
console = logging.StreamHandler()
123
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
127
logger.addHandler(console)
141
console = logging.StreamHandler()
142
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
146
logger.addHandler(console)
128
147
logger.setLevel(level)
131
class CryptoError(Exception):
150
class PGPError(Exception):
151
"""Exception if encryption/decryption fails"""
135
class Crypto(object):
155
class PGPEngine(object):
136
156
"""A simple class for OpenPGP symmetric encryption & decryption"""
137
158
def __init__(self):
138
self.gnupg = GnuPGInterface.GnuPG()
139
159
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
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',
160
self.gnupgargs = ['--batch',
161
'--home', self.tempdir,
146
166
def __enter__(self):
149
def __exit__ (self, exc_type, exc_value, traceback):
169
def __exit__(self, exc_type, exc_value, traceback):
169
189
def password_encode(self, password):
170
190
# Passphrase can not be empty and can not contain newlines or
171
191
# NUL bytes. So we prefix it and hex encode it.
172
return b"mandos" + binascii.hexlify(password)
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"))
174
200
def encrypt(self, data, password):
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
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:
189
216
return ciphertext
191
218
def decrypt(self, data, password):
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
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:
206
234
return decrypted_plaintext
210
237
class AvahiError(Exception):
211
238
def __init__(self, value, *args, **kwargs):
212
239
self.value = value
213
super(AvahiError, self).__init__(value, *args, **kwargs)
214
def __unicode__(self):
215
return unicode(repr(self.value))
240
return super(AvahiError, self).__init__(value, *args,
217
244
class AvahiServiceError(AvahiError):
220
248
class AvahiGroupError(AvahiError):
364
422
follow_name_owner_changes=True),
365
423
avahi.DBUS_INTERFACE_SERVER)
366
424
self.server.connect_to_signal("StateChanged",
367
self.server_state_changed)
425
self.server_state_changed)
368
426
self.server_state_changed(self.server.GetState())
370
429
class AvahiServiceToSyslog(AvahiService):
430
def rename(self, *args, **kwargs):
372
431
"""Add the new name to the syslog messages"""
373
ret = AvahiService.rename(self)
374
syslogger.setFormatter(logging.Formatter
375
('Mandos (%s) [%%(process)d]:'
376
' %%(levelname)s: %%(message)s'
432
ret = AvahiService.rename(self, *args, **kwargs)
433
syslogger.setFormatter(logging.Formatter(
434
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
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))
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))
386
448
class Client(object):
387
449
"""A representation of a client host served by this server.
390
_approved: bool(); 'None' if not yet approved/disapproved
452
approved: bool(); 'None' if not yet approved/disapproved
391
453
approval_delay: datetime.timedelta(); Time to wait for approval
392
454
approval_duration: datetime.timedelta(); Duration of one approval
393
455
checker: subprocess.Popen(); a running checker process used
411
473
interval: datetime.timedelta(); How often to start a new checker
412
474
last_approval_request: datetime.datetime(); (UTC) or None
413
475
last_checked_ok: datetime.datetime(); (UTC) or None
415
476
last_checker_status: integer between 0 and 255 reflecting exit
416
477
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
418
481
last_enabled: datetime.datetime(); (UTC) or None
419
482
name: string; from the config file, used in log messages and
420
483
D-Bus identifiers
421
484
secret: bytestring; sent verbatim (over TLS) to client
422
485
timeout: datetime.timedelta(); How long from last_checked_ok
423
486
until this client is disabled
424
extended_timeout: extra long timeout when password has been sent
487
extended_timeout: extra long timeout when secret has been sent
425
488
runtime_expansions: Allowed attributes for runtime expansion.
426
489
expires: datetime.datetime(); time (UTC) when a client will be
427
490
disabled, or None
491
server_settings: The server_settings dict from main()
430
494
runtime_expansions = ("approval_delay", "approval_duration",
431
"created", "enabled", "fingerprint",
432
"host", "interval", "last_checked_ok",
495
"created", "enabled", "expires",
496
"fingerprint", "host", "interval",
497
"last_approval_request", "last_checked_ok",
433
498
"last_enabled", "name", "timeout")
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'
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):
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
457
580
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()
463
581
logger.debug(" Fingerprint: %s", self.fingerprint)
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()
476
self.enabled = config.get("enabled", True)
477
self.last_approval_request = None
479
self.last_enabled = datetime.datetime.utcnow()
481
self.last_enabled = None
482
self.last_checked_ok = None
483
self.last_checker_status = None
484
self.timeout = string_to_delta(config["timeout"])
485
self.extended_timeout = string_to_delta(config
486
["extended_timeout"])
487
self.interval = string_to_delta(config["interval"])
582
self.created = settings.get("created",
583
datetime.datetime.utcnow())
585
# attributes specific for this server instance
488
586
self.checker = None
489
587
self.checker_initiator_tag = None
490
588
self.disable_initiator_tag = None
492
self.expires = datetime.datetime.utcnow() + self.timeout
495
589
self.checker_callback_tag = None
496
self.checker_command = config["checker"]
497
590
self.current_checker_command = None
498
self._approved = None
499
self.approved_by_default = config.get("approved_by_default",
501
592
self.approvals_pending = 0
502
self.approval_delay = string_to_delta(
503
config["approval_delay"])
504
self.approval_duration = string_to_delta(
505
config["approval_duration"])
506
self.changedstate = (multiprocessing_manager
507
.Condition(multiprocessing_manager
509
self.client_structure = [attr for attr in
510
self.__dict__.iterkeys()
593
self.changedstate = multiprocessing_manager.Condition(
594
multiprocessing_manager.Lock())
595
self.client_structure = [attr
596
for attr in self.__dict__.iterkeys()
511
597
if not attr.startswith("_")]
512
598
self.client_structure.append("client_structure")
514
for name, t in inspect.getmembers(type(self),
600
for name, t in inspect.getmembers(
601
type(self), lambda obj: isinstance(obj, property)):
518
602
if not name.startswith("_"):
519
603
self.client_structure.append(name)
560
644
def init_checker(self):
561
645
# Schedule a new checker to be started an 'interval' from now,
562
646
# and every interval from then on.
563
self.checker_initiator_tag = (gobject.timeout_add
564
(self.interval_milliseconds(),
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),
566
652
# Schedule a disable() when 'timeout' has passed
567
self.disable_initiator_tag = (gobject.timeout_add
568
(self.timeout_milliseconds(),
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)
570
657
# Also start a new checker *right now*.
571
658
self.start_checker()
573
def checker_callback(self, pid, condition, command):
660
def checker_callback(self, source, condition, connection,
574
662
"""The checker has completed, so take appropriate actions."""
575
663
self.checker_callback_tag = None
576
664
self.checker = None
577
if os.WIFEXITED(condition):
578
self.last_checker_status = os.WEXITSTATUS(condition)
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
579
672
if self.last_checker_status == 0:
580
673
logger.info("Checker for %(name)s succeeded",
582
675
self.checked_ok()
584
logger.info("Checker for %(name)s failed",
677
logger.info("Checker for %(name)s failed", vars(self))
587
679
self.last_checker_status = -1
680
self.last_checker_signal = -returncode
588
681
logger.warning("Checker for %(name)s crashed?",
591
def checked_ok(self, timeout=None):
592
"""Bump up the timeout for this client.
594
This should only be called when the client has been seen,
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."""
597
694
if timeout is None:
598
695
timeout = self.timeout
599
self.last_checked_ok = datetime.datetime.utcnow()
600
696
if self.disable_initiator_tag is not None:
601
697
gobject.source_remove(self.disable_initiator_tag)
698
self.disable_initiator_tag = None
602
699
if getattr(self, "enabled", False):
603
self.disable_initiator_tag = (gobject.timeout_add
604
(_timedelta_to_milliseconds
605
(timeout), self.disable))
700
self.disable_initiator_tag = gobject.timeout_add(
701
int(timeout.total_seconds() * 1000), self.disable)
606
702
self.expires = datetime.datetime.utcnow() + timeout
608
704
def need_approval(self):
614
710
If a checker already exists, leave it running and do
616
712
# The reason for not killing a running checker is that if we
617
# did that, then if a checker (for some reason) started
618
# running slowly and taking more than 'interval' time, the
619
# client would inevitably timeout, since no checker would get
620
# a chance to run to completion. If we instead leave running
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
621
717
# checkers alone, the checker would have to take more time
622
718
# than 'timeout' for the client to be disabled, which is as it
625
# If a checker exists, make sure it is not a zombie
627
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
628
except (AttributeError, OSError) as error:
629
if (isinstance(error, OSError)
630
and error.errno != errno.ECHILD):
634
logger.warning("Checker was a zombie")
635
gobject.source_remove(self.checker_callback_tag)
636
self.checker_callback(pid, status,
637
self.current_checker_command)
721
if self.checker is not None and not self.checker.is_alive():
722
logger.warning("Checker was not alive; joining")
638
725
# Start a new checker if needed
639
726
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 }
641
# In case checker_command has exactly one % operator
642
command = self.checker_command % self.host
644
# Escape attributes for the shell
645
escaped_attrs = dict(
647
re.escape(unicode(str(getattr(self, attr, "")),
651
self.runtime_expansions)
654
command = self.checker_command % escaped_attrs
655
except TypeError as error:
656
logger.error('Could not format string "%s":'
657
' %s', self.checker_command, error)
658
return True # Try again later
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
659
738
self.current_checker_command = command
661
logger.info("Starting checker %r for %s",
663
# We don't need to redirect stdout and stderr, since
664
# in normal mode, that is already done by daemon(),
665
# and in debug mode we don't want to. (Stdin is
666
# always replaced by /dev/null.)
667
self.checker = subprocess.Popen(command,
670
self.checker_callback_tag = (gobject.child_watch_add
672
self.checker_callback,
674
# The checker may have completed before the gobject
675
# watch was added. Check for this.
676
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
678
gobject.source_remove(self.checker_callback_tag)
679
self.checker_callback(pid, status, command)
680
except OSError as error:
681
logger.error("Failed to start subprocess: %s",
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)
683
764
# Re-run this periodically if run by gobject.timeout_add
763
def _is_dbus_property(obj):
764
return getattr(obj, "_dbus_is_property", False)
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),
766
def _get_all_dbus_properties(self):
890
def _get_all_dbus_things(self, thing):
767
891
"""Returns a generator of (name, attribute) pairs
769
return ((prop.__get__(self)._dbus_name, prop.__get__(self))
893
return ((getattr(athing.__get__(self), "_dbus_name", name),
894
athing.__get__(self))
770
895
for cls in self.__class__.__mro__
772
inspect.getmembers(cls, self._is_dbus_property))
897
inspect.getmembers(cls, self._is_dbus_thing(thing)))
774
899
def _get_dbus_property(self, interface_name, property_name):
775
900
"""Returns a bound method if one exists which is a D-Bus
776
901
property with the specified name and interface.
778
for cls in self.__class__.__mro__:
779
for name, value in (inspect.getmembers
780
(cls, self._is_dbus_property)):
903
for cls in self.__class__.__mro__:
904
for name, value in inspect.getmembers(
905
cls, self._is_dbus_thing("property")):
781
906
if (value._dbus_name == property_name
782
907
and value._dbus_interface == interface_name):
783
908
return value.__get__(self)
785
910
# No such property
786
raise DBusPropertyNotFound(self.dbus_object_path + ":"
787
+ interface_name + "."
911
raise DBusPropertyNotFound("{}:{}.{}".format(
912
self.dbus_object_path, interface_name, property_name))
790
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
914
@dbus.service.method(dbus.PROPERTIES_IFACE,
791
916
out_signature="v")
792
917
def Get(self, interface_name, property_name):
793
918
"""Standard D-Bus property Get() method, see D-Bus standard.
837
965
if not hasattr(value, "variant_level"):
838
966
properties[name] = value
840
properties[name] = type(value)(value, variant_level=
841
value.variant_level+1)
968
properties[name] = type(value)(
969
value, variant_level = value.variant_level + 1)
842
970
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
844
980
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
845
981
out_signature="s",
846
982
path_keyword='object_path',
847
983
connection_keyword='connection')
848
984
def Introspect(self, object_path, connection):
849
"""Standard D-Bus method, overloaded to insert property tags.
985
"""Overloading of standard D-Bus method.
987
Inserts property tags and interface annotation tags.
851
989
xmlstring = dbus.service.Object.Introspect(self, object_path,
854
992
document = xml.dom.minidom.parseString(xmlstring)
855
994
def make_tag(document, name, prop):
856
995
e = document.createElement("property")
857
996
e.setAttribute("name", name)
858
997
e.setAttribute("type", prop._dbus_signature)
859
998
e.setAttribute("access", prop._dbus_access)
861
1001
for if_tag in document.getElementsByTagName("interface"):
862
1003
for tag in (make_tag(document, name, prop)
864
in self._get_all_dbus_properties()
1005
in self._get_all_dbus_things("property")
865
1006
if prop._dbus_interface
866
1007
== if_tag.getAttribute("name")):
867
1008
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)
868
1038
# Add the names to the return values for the
869
1039
# "org.freedesktop.DBus.Properties" methods
870
1040
if (if_tag.getAttribute("name")
885
1055
except (AttributeError, xml.dom.DOMException,
886
1056
xml.parsers.expat.ExpatError) as error:
887
1057
logger.error("Failed to override Introspection method",
889
1059
return xmlstring
892
def datetime_to_dbus (dt, variant_level=0):
1062
def datetime_to_dbus(dt, variant_level=0):
893
1063
"""Convert a UTC datetime.datetime() to a D-Bus type."""
895
1065
return dbus.String("", variant_level = variant_level)
896
return dbus.String(dt.isoformat(),
897
variant_level=variant_level)
900
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
902
"""Applied to an empty subclass of a D-Bus object, this metaclass
903
will add additional D-Bus attributes matching a certain pattern.
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).
905
def __new__(mcs, name, bases, attr):
906
# Go through all the base classes which could have D-Bus
907
# methods, signals, or properties in them
908
for base in (b for b in bases
909
if issubclass(b, dbus.service.Object)):
910
# Go though all attributes of the base class
911
for attrname, attribute in inspect.getmembers(base):
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):
912
1100
# Ignore non-D-Bus attributes, and D-Bus attributes
913
1101
# with the wrong interface name
914
1102
if (not hasattr(attribute, "_dbus_interface")
915
or not attribute._dbus_interface
916
.startswith("se.recompile.Mandos")):
1103
or not attribute._dbus_interface.startswith(
1104
orig_interface_name)):
918
1106
# Create an alternate D-Bus interface name based on
919
1107
# the current name
920
alt_interface = (attribute._dbus_interface
921
.replace("se.recompile.Mandos",
922
"se.bsnet.fukt.Mandos"))
1108
alt_interface = attribute._dbus_interface.replace(
1109
orig_interface_name, alt_interface_name)
1110
interface_names.add(alt_interface)
923
1111
# Is this a D-Bus signal?
924
1112
if getattr(attribute, "_dbus_is_signal", False):
925
# Extract the original non-method function by
927
nonmethod_func = (dict(
1113
if sys.version_info.major == 2:
1114
# Extract the original non-method undecorated
1115
# function by black magic
1116
nonmethod_func = (dict(
928
1117
zip(attribute.func_code.co_freevars,
929
attribute.__closure__))["func"]
1118
attribute.__closure__))
1119
["func"].cell_contents)
1121
nonmethod_func = attribute
931
1122
# Create a new, but exactly alike, function
932
1123
# object, and decorate it to be a new D-Bus signal
933
1124
# with the alternate D-Bus interface name
934
new_function = (dbus.service.signal
936
attribute._dbus_signature)
938
nonmethod_func.func_code,
939
nonmethod_func.func_globals,
940
nonmethod_func.func_name,
941
nonmethod_func.func_defaults,
942
nonmethod_func.func_closure)))
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:
943
1148
# Define a creator of a function to call both the
944
# old and new functions, so both the old and new
945
# signals gets sent when the function is called
1149
# original and alternate functions, so both the
1150
# original and alternate signals gets sent when
1151
# the function is called
946
1152
def fixscope(func1, func2):
947
1153
"""This function is a scope container to pass
948
1154
func1 and func2 to the "call_both" function
949
1155
outside of its arguments"""
950
1157
def call_both(*args, **kwargs):
951
1158
"""This function will emit two D-Bus
952
1159
signals by calling func1 and func2"""
953
1160
func1(*args, **kwargs)
954
1161
func2(*args, **kwargs)
955
1163
return call_both
956
1164
# Create the "call_both" function and add it to
958
attr[attrname] = fixscope(attribute,
1166
attr[attrname] = fixscope(attribute, new_function)
960
1167
# Is this a D-Bus method?
961
1168
elif getattr(attribute, "_dbus_is_method", False):
962
1169
# Create a new, but exactly alike, function
963
1170
# object. Decorate it to be a new D-Bus method
964
1171
# with the alternate D-Bus interface name. Add it
966
attr[attrname] = (dbus.service.method
968
attribute._dbus_in_signature,
969
attribute._dbus_out_signature)
971
(attribute.func_code,
972
attribute.func_globals,
974
attribute.func_defaults,
975
attribute.func_closure)))
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:
976
1189
# Is this a D-Bus property?
977
1190
elif getattr(attribute, "_dbus_is_property", False):
978
1191
# Create a new, but exactly alike, function
979
1192
# object, and decorate it to be a new D-Bus
980
1193
# property with the alternate D-Bus interface
981
1194
# name. Add it to the class.
982
attr[attrname] = (dbus_service_property
984
attribute._dbus_signature,
985
attribute._dbus_access,
987
._dbus_get_args_options
990
(attribute.func_code,
991
attribute.func_globals,
993
attribute.func_defaults,
994
attribute.func_closure)))
995
return type.__new__(mcs, name, bases, attr)
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"})
998
1252
class ClientDBus(Client, DBusObjectWithProperties):
999
1253
"""A Client class using D-Bus
1059
1325
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1060
1326
last_enabled = notifychangeproperty(datetime_to_dbus,
1062
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1063
type_func = lambda checker:
1064
checker is not None)
1328
checker = notifychangeproperty(
1329
dbus.Boolean, "CheckerRunning",
1330
type_func = lambda checker: checker is not None)
1065
1331
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1066
1332
"LastCheckedOK")
1333
last_checker_status = notifychangeproperty(dbus.Int16,
1334
"LastCheckerStatus")
1067
1335
last_approval_request = notifychangeproperty(
1068
1336
datetime_to_dbus, "LastApprovalRequest")
1069
1337
approved_by_default = notifychangeproperty(dbus.Boolean,
1070
1338
"ApprovedByDefault")
1071
approval_delay = notifychangeproperty(dbus.UInt16,
1074
_timedelta_to_milliseconds)
1339
approval_delay = notifychangeproperty(
1340
dbus.UInt64, "ApprovalDelay",
1341
type_func = lambda td: td.total_seconds() * 1000)
1075
1342
approval_duration = notifychangeproperty(
1076
dbus.UInt16, "ApprovalDuration",
1077
type_func = _timedelta_to_milliseconds)
1343
dbus.UInt64, "ApprovalDuration",
1344
type_func = lambda td: td.total_seconds() * 1000)
1078
1345
host = notifychangeproperty(dbus.String, "Host")
1079
timeout = notifychangeproperty(dbus.UInt16, "Timeout",
1081
_timedelta_to_milliseconds)
1346
timeout = notifychangeproperty(
1347
dbus.UInt64, "Timeout",
1348
type_func = lambda td: td.total_seconds() * 1000)
1082
1349
extended_timeout = notifychangeproperty(
1083
dbus.UInt16, "ExtendedTimeout",
1084
type_func = _timedelta_to_milliseconds)
1085
interval = notifychangeproperty(dbus.UInt16,
1088
_timedelta_to_milliseconds)
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)
1089
1355
checker_command = notifychangeproperty(dbus.String, "Checker")
1356
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1357
invalidate_only=True)
1091
1359
del notifychangeproperty
1099
1367
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1100
1368
Client.__del__(self, *args, **kwargs)
1102
def checker_callback(self, pid, condition, command,
1104
self.checker_callback_tag = None
1106
if os.WIFEXITED(condition):
1107
exitstatus = os.WEXITSTATUS(condition)
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
1108
1377
# Emit D-Bus signal
1109
1378
self.CheckerCompleted(dbus.Int16(exitstatus),
1110
dbus.Int64(condition),
1111
1380
dbus.String(command))
1113
1382
# Emit D-Bus signal
1114
1383
self.CheckerCompleted(dbus.Int16(-1),
1115
dbus.Int64(condition),
1385
self.last_checker_signal),
1116
1386
dbus.String(command))
1118
return Client.checker_callback(self, pid, condition, command,
1121
1389
def start_checker(self, *args, **kwargs):
1122
old_checker = self.checker
1123
if self.checker is not None:
1124
old_checker_pid = self.checker.pid
1126
old_checker_pid = None
1390
old_checker_pid = getattr(self.checker, "pid", None)
1127
1391
r = Client.start_checker(self, *args, **kwargs)
1128
1392
# Only if new checker process was started
1129
1393
if (self.checker is not None
1322
1590
return datetime_to_dbus(self.last_approval_request)
1324
1592
# Timeout - property
1325
@dbus_service_property(_interface, signature="t",
1593
@dbus_service_property(_interface,
1326
1595
access="readwrite")
1327
1596
def Timeout_dbus_property(self, value=None):
1328
1597
if value is None: # get
1329
return dbus.UInt64(self.timeout_milliseconds())
1598
return dbus.UInt64(self.timeout.total_seconds() * 1000)
1599
old_timeout = self.timeout
1330
1600
self.timeout = datetime.timedelta(0, 0, 0, value)
1331
if getattr(self, "disable_initiator_tag", None) is None:
1333
# Reschedule timeout
1334
gobject.source_remove(self.disable_initiator_tag)
1335
self.disable_initiator_tag = None
1337
time_to_die = _timedelta_to_milliseconds((self
1342
if time_to_die <= 0:
1343
# The timeout has passed
1346
self.expires = (datetime.datetime.utcnow()
1347
+ datetime.timedelta(milliseconds =
1349
self.disable_initiator_tag = (gobject.timeout_add
1350
(time_to_die, self.disable))
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),
1352
1617
# ExtendedTimeout - property
1353
@dbus_service_property(_interface, signature="t",
1618
@dbus_service_property(_interface,
1354
1620
access="readwrite")
1355
1621
def ExtendedTimeout_dbus_property(self, value=None):
1356
1622
if value is None: # get
1357
return dbus.UInt64(self.extended_timeout_milliseconds())
1623
return dbus.UInt64(self.extended_timeout.total_seconds()
1358
1625
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1360
1627
# Interval - property
1361
@dbus_service_property(_interface, signature="t",
1628
@dbus_service_property(_interface,
1362
1630
access="readwrite")
1363
1631
def Interval_dbus_property(self, value=None):
1364
1632
if value is None: # get
1365
return dbus.UInt64(self.interval_milliseconds())
1633
return dbus.UInt64(self.interval.total_seconds() * 1000)
1366
1634
self.interval = datetime.timedelta(0, 0, 0, value)
1367
1635
if getattr(self, "checker_initiator_tag", None) is None:
1369
1637
if self.enabled:
1370
1638
# Reschedule checker run
1371
1639
gobject.source_remove(self.checker_initiator_tag)
1372
self.checker_initiator_tag = (gobject.timeout_add
1373
(value, self.start_checker))
1374
self.start_checker() # Start one now, too
1640
self.checker_initiator_tag = gobject.timeout_add(
1641
value, self.start_checker)
1642
self.start_checker() # Start one now, too
1376
1644
# Checker - property
1377
@dbus_service_property(_interface, signature="s",
1645
@dbus_service_property(_interface,
1378
1647
access="readwrite")
1379
1648
def Checker_dbus_property(self, value=None):
1380
1649
if value is None: # get
1381
1650
return dbus.String(self.checker_command)
1382
self.checker_command = value
1651
self.checker_command = str(value)
1384
1653
# CheckerRunning - property
1385
@dbus_service_property(_interface, signature="b",
1654
@dbus_service_property(_interface,
1386
1656
access="readwrite")
1387
1657
def CheckerRunning_dbus_property(self, value=None):
1388
1658
if value is None: # get
1619
1883
def fingerprint(openpgp):
1620
1884
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1621
1885
# New GnuTLS "datum" with the OpenPGP public key
1622
datum = (gnutls.library.types
1623
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1626
ctypes.c_uint(len(openpgp))))
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)))
1627
1890
# New empty GnuTLS certificate
1628
1891
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1629
(gnutls.library.functions
1630
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1892
gnutls.library.functions.gnutls_openpgp_crt_init(
1631
1894
# Import the OpenPGP public key into the certificate
1632
(gnutls.library.functions
1633
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1634
gnutls.library.constants
1635
.GNUTLS_OPENPGP_FMT_RAW))
1895
gnutls.library.functions.gnutls_openpgp_crt_import(
1896
crt, ctypes.byref(datum),
1897
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
1636
1898
# Verify the self signature in the key
1637
1899
crtverify = ctypes.c_uint()
1638
(gnutls.library.functions
1639
.gnutls_openpgp_crt_verify_self(crt, 0,
1640
ctypes.byref(crtverify)))
1900
gnutls.library.functions.gnutls_openpgp_crt_verify_self(
1901
crt, 0, ctypes.byref(crtverify))
1641
1902
if crtverify.value != 0:
1642
1903
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1643
raise (gnutls.errors.CertificateSecurityError
1904
raise gnutls.errors.CertificateSecurityError(
1645
1906
# New buffer for the fingerprint
1646
1907
buf = ctypes.create_string_buffer(20)
1647
1908
buf_len = ctypes.c_size_t()
1648
1909
# Get the fingerprint from the certificate into the buffer
1649
(gnutls.library.functions
1650
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1651
ctypes.byref(buf_len)))
1910
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint(
1911
crt, ctypes.byref(buf), ctypes.byref(buf_len))
1652
1912
# Deinit the certificate
1653
1913
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1654
1914
# Convert the buffer to a Python bytestring
1704
1965
interface: None or a network interface name (string)
1705
1966
use_ipv6: Boolean; to use IPv6 or not
1707
1969
def __init__(self, server_address, RequestHandlerClass,
1708
interface=None, use_ipv6=True):
1973
"""If socketfd is set, use that file descriptor instead of
1974
creating a new one with socket.socket().
1709
1976
self.interface = interface
1711
1978
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.
1712
2005
socketserver.TCPServer.__init__(self, server_address,
1713
2006
RequestHandlerClass)
1714
2008
def server_bind(self):
1715
2009
"""This overrides the normal server_bind() function
1716
2010
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}"
1881
2266
def string_to_delta(interval):
1882
2267
"""Parse a string and return a datetime.timedelta
1997
2397
"debug": "False",
1999
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2399
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2400
":+SIGN-DSA-SHA256",
2000
2401
"servicename": "Mandos",
2001
2402
"use_dbus": "True",
2002
2403
"use_ipv6": "True",
2003
2404
"debuglevel": "",
2004
2405
"restore": "True",
2005
"statedir": "/var/lib/mandos"
2407
"statedir": "/var/lib/mandos",
2408
"foreground": "False",
2008
2412
# Parse config file for server-global settings
2009
2413
server_config = configparser.SafeConfigParser(server_defaults)
2010
2414
del server_defaults
2011
server_config.read(os.path.join(options.configdir,
2415
server_config.read(os.path.join(options.configdir, "mandos.conf"))
2013
2416
# Convert the SafeConfigParser object to a dict
2014
2417
server_settings = server_config.defaults()
2015
2418
# Use the appropriate methods on the non-string config options
2016
for option in ("debug", "use_dbus", "use_ipv6"):
2419
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
2017
2420
server_settings[option] = server_config.getboolean("DEFAULT",
2019
2422
if server_settings["port"]:
2020
2423
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
2022
2434
del server_config
2024
2436
# Override the settings from the config file with command line
2025
2437
# options, if set.
2026
2438
for option in ("interface", "address", "port", "debug",
2027
"priority", "servicename", "configdir",
2028
"use_dbus", "use_ipv6", "debuglevel", "restore",
2439
"priority", "servicename", "configdir", "use_dbus",
2440
"use_ipv6", "debuglevel", "restore", "statedir",
2441
"socket", "foreground", "zeroconf"):
2030
2442
value = getattr(options, option)
2031
2443
if value is not None:
2032
2444
server_settings[option] = value
2034
2446
# Force all strings to be unicode
2035
2447
for option in server_settings.keys():
2036
if type(server_settings[option]) is str:
2037
server_settings[option] = unicode(server_settings[option])
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
2038
2458
# Now we have our good server settings in "server_settings"
2040
2460
##################################################################
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")
2042
2467
# For convenience
2043
2468
debug = server_settings["debug"]
2044
2469
debuglevel = server_settings["debuglevel"]
2046
2471
use_ipv6 = server_settings["use_ipv6"]
2047
2472
stored_state_path = os.path.join(server_settings["statedir"],
2048
2473
stored_state_file)
2474
foreground = server_settings["foreground"]
2475
zeroconf = server_settings["zeroconf"]
2051
initlogger(logging.DEBUG)
2478
initlogger(debug, logging.DEBUG)
2053
2480
if not debuglevel:
2056
2483
level = getattr(logging, debuglevel.upper())
2484
initlogger(debug, level)
2059
2486
if server_settings["servicename"] != "Mandos":
2060
syslogger.setFormatter(logging.Formatter
2061
('Mandos (%s) [%%(process)d]:'
2062
' %%(levelname)s: %%(message)s'
2063
% server_settings["servicename"]))
2487
syslogger.setFormatter(
2488
logging.Formatter('Mandos ({}) [%(process)d]:'
2489
' %(levelname)s: %(message)s'.format(
2490
server_settings["servicename"])))
2065
2492
# Parse config file with clients
2066
client_defaults = { "timeout": "5m",
2067
"extended_timeout": "15m",
2069
"checker": "fping -q -- %%(host)s",
2071
"approval_delay": "0s",
2072
"approval_duration": "1s",
2074
client_config = configparser.SafeConfigParser(client_defaults)
2493
client_config = configparser.SafeConfigParser(Client
2075
2495
client_config.read(os.path.join(server_settings["configdir"],
2076
2496
"clients.conf"))
2078
2498
global mandos_dbus_service
2079
2499
mandos_dbus_service = None
2081
tcp_server = MandosServer((server_settings["address"],
2082
server_settings["port"]),
2084
interface=(server_settings["interface"]
2088
server_settings["priority"],
2091
pidfilename = "/var/run/mandos.pid"
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"
2093
pidfile = open(pidfilename, "w")
2095
logger.error("Could not open file %r", pidfilename)
2518
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
2519
except IOError as e:
2520
logger.error("Could not open file %r", pidfilename,
2098
uid = pwd.getpwnam("_mandos").pw_uid
2099
gid = pwd.getpwnam("_mandos").pw_gid
2523
for name in ("_mandos", "mandos", "nobody"):
2102
uid = pwd.getpwnam("mandos").pw_uid
2103
gid = pwd.getpwnam("mandos").pw_gid
2525
uid = pwd.getpwnam(name).pw_uid
2526
gid = pwd.getpwnam(name).pw_gid
2104
2528
except KeyError:
2106
uid = pwd.getpwnam("nobody").pw_uid
2107
gid = pwd.getpwnam("nobody").pw_gid
2114
2536
except OSError as error:
2115
if error[0] != errno.EPERM:
2537
if error.errno != errno.EPERM:
2119
2541
# Enable all possible GnuTLS debugging
2126
2548
def debug_gnutls(level, string):
2127
2549
logger.debug("GnuTLS: %s", string[:-1])
2129
(gnutls.library.functions
2130
.gnutls_global_set_log_function(debug_gnutls))
2551
gnutls.library.functions.gnutls_global_set_log_function(
2132
2554
# Redirect stdin so all checkers get /dev/null
2133
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2555
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2134
2556
os.dup2(null, sys.stdin.fileno())
2138
# No console logging
2139
logger.removeHandler(console)
2141
2560
# Need to fork before connecting to D-Bus
2143
2562
# 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()
2146
2569
global main_loop
2147
2570
# From the Avahi example code
2148
DBusGMainLoop(set_as_default=True )
2571
DBusGMainLoop(set_as_default=True)
2149
2572
main_loop = gobject.MainLoop()
2150
2573
bus = dbus.SystemBus()
2151
2574
# End of Avahi example code
2154
2577
bus_name = dbus.service.BusName("se.recompile.Mandos",
2155
bus, do_not_queue=True)
2156
old_bus_name = (dbus.service.BusName
2157
("se.bsnet.fukt.Mandos", bus,
2159
except dbus.exceptions.NameExistsException as e:
2160
logger.error(unicode(e) + ", disabling D-Bus")
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)
2161
2585
use_dbus = False
2162
2586
server_settings["use_dbus"] = False
2163
2587
tcp_server.use_dbus = False
2164
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2165
service = AvahiServiceToSyslog(name =
2166
server_settings["servicename"],
2167
servicetype = "_mandos._tcp",
2168
protocol = protocol, bus = bus)
2169
if server_settings["interface"]:
2170
service.interface = (if_nametoindex
2171
(str(server_settings["interface"])))
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"))
2173
2599
global multiprocessing_manager
2174
2600
multiprocessing_manager = multiprocessing.Manager()
2176
2602
client_class = Client
2178
client_class = functools.partial(ClientDBusTransitional,
2181
special_settings = {
2182
# Some settings need to be accessd by special methods;
2183
# booleans need .getboolean(), etc. Here is a list of them:
2184
"approved_by_default":
2186
client_config.getboolean(section, "approved_by_default"),
2189
client_config.getboolean(section, "enabled"),
2191
# Construct a new dict of client settings of this form:
2192
# { client_name: {setting_name: value, ...}, ...}
2193
# with exceptions for any special settings as defined above
2194
client_settings = dict((clientname,
2197
if setting not in special_settings
2198
else special_settings[setting]
2200
for setting, value in
2201
client_config.items(clientname)))
2202
for clientname in client_config.sections())
2604
client_class = functools.partial(ClientDBus, bus = bus)
2606
client_settings = Client.config_parser(client_config)
2204
2607
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:
2207
2618
# Get client data and settings from last running state.
2208
2619
if server_settings["restore"]:
2210
2621
with open(stored_state_path, "rb") as stored_state:
2211
clients_data, old_client_settings = (pickle.load
2622
clients_data, old_client_settings = pickle.load(
2213
2624
os.remove(stored_state_path)
2214
2625
except IOError as e:
2215
logger.warning("Could not load persistent state: {0}"
2217
if e.errno != errno.ENOENT:
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:",
2633
except EOFError as e:
2634
logger.warning("Could not load persistent state: "
2220
with Crypto() as crypt:
2221
for client in clients_data:
2222
client_name = client["name"]
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:
2224
2644
# Decide which value to use after restoring saved state.
2225
2645
# We have three different values: Old config file,
2231
2651
# For each value in new config, check if it
2232
2652
# differs from the old config value (Except for
2233
2653
# the "secret" attribute)
2234
if (name != "secret" and
2235
value != old_client_settings[client_name]
2237
setattr(client, name, value)
2654
if (name != "secret"
2656
old_client_settings[client_name][name])):
2657
client[name] = value
2238
2658
except KeyError:
2241
2661
# Clients who has passed its expire date can still be
2242
# enabled if its last checker was sucessful. Clients
2243
# whose checker failed before we stored its state is
2244
# assumed to have failed all checkers during downtime.
2245
if client["enabled"] and client["last_checked_ok"]:
2246
if ((datetime.datetime.utcnow()
2247
- client["last_checked_ok"])
2248
> client["interval"]):
2249
if client["last_checker_status"] != 0:
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"]))
2250
2681
client["enabled"] = False
2252
client["expires"] = (datetime.datetime
2254
+ client["timeout"])
2256
client["changedstate"] = (multiprocessing_manager
2258
(multiprocessing_manager
2261
new_client = (ClientDBusTransitional.__new__
2262
(ClientDBusTransitional))
2263
tcp_server.clients[client_name] = new_client
2264
new_client.bus = bus
2265
for name, value in client.iteritems():
2266
setattr(new_client, name, value)
2267
client_object_name = unicode(client_name).translate(
2268
{ord("."): ord("_"),
2269
ord("-"): ord("_")})
2270
new_client.dbus_object_path = (dbus.ObjectPath
2272
+ client_object_name))
2273
DBusObjectWithProperties.__init__(new_client,
2278
tcp_server.clients[client_name] = (Client.__new__
2280
for name, value in client.iteritems():
2281
setattr(tcp_server.clients[client_name],
2683
client["expires"] = (
2684
datetime.datetime.utcnow()
2685
+ client["timeout"])
2686
logger.debug("Last checker succeeded,"
2687
" keeping {} enabled".format(
2285
tcp_server.clients[client_name].secret = (
2286
crypt.decrypt(tcp_server.clients[client_name]
2288
client_settings[client_name]
2690
client["secret"] = pgp.decrypt(
2691
client["encrypted_secret"],
2692
client_settings[client_name]["secret"])
2291
2694
# If decryption fails, we use secret from new settings
2292
tcp_server.clients[client_name].secret = (
2293
client_settings[client_name]["secret"])
2295
# Create/remove clients based on new changes made to config
2296
for clientname in set(old_client_settings) - set(client_settings):
2297
del tcp_server.clients[clientname]
2298
for clientname in set(client_settings) - set(old_client_settings):
2299
tcp_server.clients[clientname] = (client_class(name
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)
2305
2715
if not tcp_server.clients:
2306
2716
logger.warning("No clients defined")
2312
pidfile.write(str(pid) + "\n".encode("utf-8"))
2315
logger.error("Could not write to file %r with PID %d",
2318
# "pidfile" was never created
2719
if pidfile is not None:
2723
print(pid, file=pidfile)
2725
logger.error("Could not write to file %r with PID %d",
2320
2728
del pidfilename
2322
signal.signal(signal.SIGINT, signal.SIG_IGN)
2324
2730
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2325
2731
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2328
class MandosDBusService(dbus.service.Object):
2735
@alternate_dbus_interfaces(
2736
{ "se.recompile.Mandos": "se.bsnet.fukt.Mandos" })
2737
class MandosDBusService(DBusObjectWithProperties):
2329
2738
"""A D-Bus proxy object"""
2330
2740
def __init__(self):
2331
2741
dbus.service.Object.__init__(self, bus, "/")
2332
2743
_interface = "se.recompile.Mandos"
2745
@dbus_interface_annotations(_interface)
2748
"org.freedesktop.DBus.Property.EmitsChangedSignal":
2334
2751
@dbus.service.signal(_interface, signature="o")
2335
2752
def ClientAdded(self, objpath):