82
101
except ImportError:
83
102
SO_BINDTODEVICE = None
88
#logger = logging.getLogger('mandos')
89
logger = logging.Logger('mandos')
90
syslogger = (logging.handlers.SysLogHandler
91
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
92
address = str("/dev/log")))
93
syslogger.setFormatter(logging.Formatter
94
('Mandos [%(process)d]: %(levelname)s:'
96
logger.addHandler(syslogger)
98
console = logging.StreamHandler()
99
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
102
logger.addHandler(console)
104
if sys.version_info.major == 2:
108
stored_state_file = "clients.pickle"
110
logger = logging.getLogger()
114
if_nametoindex = ctypes.cdll.LoadLibrary(
115
ctypes.util.find_library("c")).if_nametoindex
116
except (OSError, AttributeError):
118
def if_nametoindex(interface):
119
"Get an interface index the hard way, i.e. using fcntl()"
120
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
121
with contextlib.closing(socket.socket()) as s:
122
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
123
struct.pack(b"16s16x", interface))
124
interface_index = struct.unpack("I", ifreq[16:20])[0]
125
return interface_index
128
def initlogger(debug, level=logging.WARNING):
129
"""init logger and add loglevel"""
132
syslogger = (logging.handlers.SysLogHandler(
133
facility = logging.handlers.SysLogHandler.LOG_DAEMON,
134
address = "/dev/log"))
135
syslogger.setFormatter(logging.Formatter
136
('Mandos [%(process)d]: %(levelname)s:'
138
logger.addHandler(syslogger)
141
console = logging.StreamHandler()
142
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
146
logger.addHandler(console)
147
logger.setLevel(level)
150
class PGPError(Exception):
151
"""Exception if encryption/decryption fails"""
155
class PGPEngine(object):
156
"""A simple class for OpenPGP symmetric encryption & decryption"""
159
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
160
self.gnupgargs = ['--batch',
161
'--home', self.tempdir,
169
def __exit__(self, exc_type, exc_value, traceback):
177
if self.tempdir is not None:
178
# Delete contents of tempdir
179
for root, dirs, files in os.walk(self.tempdir,
181
for filename in files:
182
os.remove(os.path.join(root, filename))
184
os.rmdir(os.path.join(root, dirname))
186
os.rmdir(self.tempdir)
189
def password_encode(self, password):
190
# Passphrase can not be empty and can not contain newlines or
191
# 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"))
200
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:
218
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:
234
return decrypted_plaintext
104
237
class AvahiError(Exception):
105
238
def __init__(self, value, *args, **kwargs):
106
239
self.value = value
107
super(AvahiError, self).__init__(value, *args, **kwargs)
108
def __unicode__(self):
109
return unicode(repr(self.value))
240
return super(AvahiError, self).__init__(value, *args,
111
244
class AvahiServiceError(AvahiError):
114
248
class AvahiGroupError(AvahiError):
299
473
interval: datetime.timedelta(); How often to start a new checker
300
474
last_approval_request: datetime.datetime(); (UTC) or None
301
475
last_checked_ok: datetime.datetime(); (UTC) or None
302
last_enabled: datetime.datetime(); (UTC)
476
last_checker_status: integer between 0 and 255 reflecting exit
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
481
last_enabled: datetime.datetime(); (UTC) or None
303
482
name: string; from the config file, used in log messages and
304
483
D-Bus identifiers
305
484
secret: bytestring; sent verbatim (over TLS) to client
306
485
timeout: datetime.timedelta(); How long from last_checked_ok
307
486
until this client is disabled
308
extended_timeout: extra long timeout when password has been sent
487
extended_timeout: extra long timeout when secret has been sent
309
488
runtime_expansions: Allowed attributes for runtime expansion.
310
489
expires: datetime.datetime(); time (UTC) when a client will be
311
490
disabled, or None
491
server_settings: The server_settings dict from main()
314
494
runtime_expansions = ("approval_delay", "approval_duration",
315
"created", "enabled", "fingerprint",
316
"host", "interval", "last_checked_ok",
495
"created", "enabled", "expires",
496
"fingerprint", "host", "interval",
497
"last_approval_request", "last_checked_ok",
317
498
"last_enabled", "name", "timeout")
319
def timeout_milliseconds(self):
320
"Return the 'timeout' attribute in milliseconds"
321
return _timedelta_to_milliseconds(self.timeout)
323
def extended_timeout_milliseconds(self):
324
"Return the 'extended_timeout' attribute in milliseconds"
325
return _timedelta_to_milliseconds(self.extended_timeout)
327
def interval_milliseconds(self):
328
"Return the 'interval' attribute in milliseconds"
329
return _timedelta_to_milliseconds(self.interval)
331
def approval_delay_milliseconds(self):
332
return _timedelta_to_milliseconds(self.approval_delay)
334
def __init__(self, name = None, disable_hook=None, config=None):
335
"""Note: the 'checker' key in 'config' sets the
336
'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
341
580
logger.debug("Creating client %r", self.name)
342
# Uppercase and remove spaces from fingerprint for later
343
# comparison purposes with return value from the fingerprint()
345
self.fingerprint = (config["fingerprint"].upper()
347
581
logger.debug(" Fingerprint: %s", self.fingerprint)
348
if "secret" in config:
349
self.secret = config["secret"].decode("base64")
350
elif "secfile" in config:
351
with open(os.path.expanduser(os.path.expandvars
352
(config["secfile"])),
354
self.secret = secfile.read()
356
raise TypeError("No secret or secfile for client %s"
358
self.host = config.get("host", "")
359
self.created = datetime.datetime.utcnow()
361
self.last_approval_request = None
362
self.last_enabled = None
363
self.last_checked_ok = None
364
self.timeout = string_to_delta(config["timeout"])
365
self.extended_timeout = string_to_delta(config
366
["extended_timeout"])
367
self.interval = string_to_delta(config["interval"])
368
self.disable_hook = disable_hook
582
self.created = settings.get("created",
583
datetime.datetime.utcnow())
585
# attributes specific for this server instance
369
586
self.checker = None
370
587
self.checker_initiator_tag = None
371
588
self.disable_initiator_tag = None
373
589
self.checker_callback_tag = None
374
self.checker_command = config["checker"]
375
590
self.current_checker_command = None
376
self.last_connect = None
377
self._approved = None
378
self.approved_by_default = config.get("approved_by_default",
380
592
self.approvals_pending = 0
381
self.approval_delay = string_to_delta(
382
config["approval_delay"])
383
self.approval_duration = string_to_delta(
384
config["approval_duration"])
385
self.changedstate = (multiprocessing_manager
386
.Condition(multiprocessing_manager
593
self.changedstate = multiprocessing_manager.Condition(
594
multiprocessing_manager.Lock())
595
self.client_structure = [attr
596
for attr in self.__dict__.iterkeys()
597
if not attr.startswith("_")]
598
self.client_structure.append("client_structure")
600
for name, t in inspect.getmembers(
601
type(self), lambda obj: isinstance(obj, property)):
602
if not name.startswith("_"):
603
self.client_structure.append(name)
605
# Send notice to process children that client state has changed
389
606
def send_changedstate(self):
390
self.changedstate.acquire()
391
self.changedstate.notify_all()
392
self.changedstate.release()
607
with self.changedstate:
608
self.changedstate.notify_all()
394
610
def enable(self):
395
611
"""Start this client's checker and timeout hooks"""
396
612
if getattr(self, "enabled", False):
397
613
# Already enabled
399
self.send_changedstate()
400
# Schedule a new checker to be started an 'interval' from now,
401
# and every interval from then on.
402
self.checker_initiator_tag = (gobject.timeout_add
403
(self.interval_milliseconds(),
405
# Schedule a disable() when 'timeout' has passed
406
615
self.expires = datetime.datetime.utcnow() + self.timeout
407
self.disable_initiator_tag = (gobject.timeout_add
408
(self.timeout_milliseconds(),
410
616
self.enabled = True
411
617
self.last_enabled = datetime.datetime.utcnow()
412
# Also start a new checker *right now*.
619
self.send_changedstate()
415
621
def disable(self, quiet=True):
416
622
"""Disable this client."""
417
623
if not getattr(self, "enabled", False):
420
self.send_changedstate()
422
626
logger.info("Disabling client %s", self.name)
423
if getattr(self, "disable_initiator_tag", False):
627
if getattr(self, "disable_initiator_tag", None) is not None:
424
628
gobject.source_remove(self.disable_initiator_tag)
425
629
self.disable_initiator_tag = None
426
630
self.expires = None
427
if getattr(self, "checker_initiator_tag", False):
631
if getattr(self, "checker_initiator_tag", None) is not None:
428
632
gobject.source_remove(self.checker_initiator_tag)
429
633
self.checker_initiator_tag = None
430
634
self.stop_checker()
431
if self.disable_hook:
432
self.disable_hook(self)
433
635
self.enabled = False
637
self.send_changedstate()
434
638
# Do not run this again if called by a gobject.timeout_add
437
641
def __del__(self):
438
self.disable_hook = None
441
def checker_callback(self, pid, condition, command):
644
def init_checker(self):
645
# Schedule a new checker to be started an 'interval' from now,
646
# 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),
652
# 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)
657
# Also start a new checker *right now*.
660
def checker_callback(self, source, condition, connection,
442
662
"""The checker has completed, so take appropriate actions."""
443
663
self.checker_callback_tag = None
444
664
self.checker = None
445
if os.WIFEXITED(condition):
446
exitstatus = 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
672
if self.last_checker_status == 0:
448
673
logger.info("Checker for %(name)s succeeded",
450
675
self.checked_ok()
452
logger.info("Checker for %(name)s failed",
677
logger.info("Checker for %(name)s failed", vars(self))
679
self.last_checker_status = -1
680
self.last_checker_signal = -returncode
455
681
logger.warning("Checker for %(name)s crashed?",
458
def checked_ok(self, timeout=None):
459
"""Bump up the timeout for this client.
461
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."""
464
694
if timeout is None:
465
695
timeout = self.timeout
466
self.last_checked_ok = datetime.datetime.utcnow()
467
gobject.source_remove(self.disable_initiator_tag)
468
self.disable_initiator_tag = (gobject.timeout_add
469
(_timedelta_to_milliseconds
470
(timeout), self.disable))
471
self.expires = datetime.datetime.utcnow() + timeout
696
if self.disable_initiator_tag is not None:
697
gobject.source_remove(self.disable_initiator_tag)
698
self.disable_initiator_tag = None
699
if getattr(self, "enabled", False):
700
self.disable_initiator_tag = gobject.timeout_add(
701
int(timeout.total_seconds() * 1000), self.disable)
702
self.expires = datetime.datetime.utcnow() + timeout
473
704
def need_approval(self):
474
705
self.last_approval_request = datetime.datetime.utcnow()
479
710
If a checker already exists, leave it running and do
481
712
# The reason for not killing a running checker is that if we
482
# did that, then if a checker (for some reason) started
483
# running slowly and taking more than 'interval' time, the
484
# client would inevitably timeout, since no checker would get
485
# 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
486
717
# checkers alone, the checker would have to take more time
487
718
# than 'timeout' for the client to be disabled, which is as it
490
# If a checker exists, make sure it is not a zombie
492
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
493
except (AttributeError, OSError) as error:
494
if (isinstance(error, OSError)
495
and error.errno != errno.ECHILD):
499
logger.warning("Checker was a zombie")
500
gobject.source_remove(self.checker_callback_tag)
501
self.checker_callback(pid, status,
502
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")
503
725
# Start a new checker if needed
504
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 }
506
# In case checker_command has exactly one % operator
507
command = self.checker_command % self.host
509
# Escape attributes for the shell
510
escaped_attrs = dict(
512
re.escape(unicode(str(getattr(self, attr, "")),
516
self.runtime_expansions)
519
command = self.checker_command % escaped_attrs
520
except TypeError as error:
521
logger.error('Could not format string "%s":'
522
' %s', self.checker_command, error)
523
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
524
738
self.current_checker_command = command
526
logger.info("Starting checker %r for %s",
528
# We don't need to redirect stdout and stderr, since
529
# in normal mode, that is already done by daemon(),
530
# and in debug mode we don't want to. (Stdin is
531
# always replaced by /dev/null.)
532
self.checker = subprocess.Popen(command,
535
self.checker_callback_tag = (gobject.child_watch_add
537
self.checker_callback,
539
# The checker may have completed before the gobject
540
# watch was added. Check for this.
541
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
543
gobject.source_remove(self.checker_callback_tag)
544
self.checker_callback(pid, status, command)
545
except OSError as error:
546
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)
548
764
# Re-run this periodically if run by gobject.timeout_add
702
965
if not hasattr(value, "variant_level"):
966
properties[name] = value
705
all[name] = type(value)(value, variant_level=
706
value.variant_level+1)
707
return dbus.Dictionary(all, signature="sv")
968
properties[name] = type(value)(
969
value, variant_level = value.variant_level + 1)
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
709
980
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
710
981
out_signature="s",
711
982
path_keyword='object_path',
712
983
connection_keyword='connection')
713
984
def Introspect(self, object_path, connection):
714
"""Standard D-Bus method, overloaded to insert property tags.
985
"""Overloading of standard D-Bus method.
987
Inserts property tags and interface annotation tags.
716
989
xmlstring = dbus.service.Object.Introspect(self, object_path,
719
992
document = xml.dom.minidom.parseString(xmlstring)
720
994
def make_tag(document, name, prop):
721
995
e = document.createElement("property")
722
996
e.setAttribute("name", name)
723
997
e.setAttribute("type", prop._dbus_signature)
724
998
e.setAttribute("access", prop._dbus_access)
726
1001
for if_tag in document.getElementsByTagName("interface"):
727
1003
for tag in (make_tag(document, name, prop)
729
in self._get_all_dbus_properties()
1005
in self._get_all_dbus_things("property")
730
1006
if prop._dbus_interface
731
1007
== if_tag.getAttribute("name")):
732
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)
733
1038
# Add the names to the return values for the
734
1039
# "org.freedesktop.DBus.Properties" methods
735
1040
if (if_tag.getAttribute("name")
750
1055
except (AttributeError, xml.dom.DOMException,
751
1056
xml.parsers.expat.ExpatError) as error:
752
1057
logger.error("Failed to override Introspection method",
754
1059
return xmlstring
757
def datetime_to_dbus (dt, variant_level=0):
1062
def datetime_to_dbus(dt, variant_level=0):
758
1063
"""Convert a UTC datetime.datetime() to a D-Bus type."""
760
1065
return dbus.String("", variant_level = variant_level)
761
return dbus.String(dt.isoformat(),
762
variant_level=variant_level)
764
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
766
"""Applied to an empty subclass of a D-Bus object, this metaclass
767
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).
769
def __new__(mcs, name, bases, attr):
770
# Go through all the base classes which could have D-Bus
771
# methods, signals, or properties in them
772
for base in (b for b in bases
773
if issubclass(b, dbus.service.Object)):
774
# Go though all attributes of the base class
775
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):
776
1100
# Ignore non-D-Bus attributes, and D-Bus attributes
777
1101
# with the wrong interface name
778
1102
if (not hasattr(attribute, "_dbus_interface")
779
or not attribute._dbus_interface
780
.startswith("se.recompile.Mandos")):
1103
or not attribute._dbus_interface.startswith(
1104
orig_interface_name)):
782
1106
# Create an alternate D-Bus interface name based on
783
1107
# the current name
784
alt_interface = (attribute._dbus_interface
785
.replace("se.recompile.Mandos",
786
"se.bsnet.fukt.Mandos"))
1108
alt_interface = attribute._dbus_interface.replace(
1109
orig_interface_name, alt_interface_name)
1110
interface_names.add(alt_interface)
787
1111
# Is this a D-Bus signal?
788
1112
if getattr(attribute, "_dbus_is_signal", False):
789
# Extract the original non-method function by
791
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(
792
1117
zip(attribute.func_code.co_freevars,
793
attribute.__closure__))["func"]
1118
attribute.__closure__))
1119
["func"].cell_contents)
1121
nonmethod_func = attribute
795
1122
# Create a new, but exactly alike, function
796
1123
# object, and decorate it to be a new D-Bus signal
797
1124
# with the alternate D-Bus interface name
798
new_function = (dbus.service.signal
800
attribute._dbus_signature)
802
nonmethod_func.func_code,
803
nonmethod_func.func_globals,
804
nonmethod_func.func_name,
805
nonmethod_func.func_defaults,
806
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:
807
1148
# Define a creator of a function to call both the
808
# old and new functions, so both the old and new
809
# 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
810
1152
def fixscope(func1, func2):
811
1153
"""This function is a scope container to pass
812
1154
func1 and func2 to the "call_both" function
813
1155
outside of its arguments"""
814
1157
def call_both(*args, **kwargs):
815
1158
"""This function will emit two D-Bus
816
1159
signals by calling func1 and func2"""
817
1160
func1(*args, **kwargs)
818
1161
func2(*args, **kwargs)
819
1163
return call_both
820
1164
# Create the "call_both" function and add it to
822
attr[attrname] = fixscope(attribute,
1166
attr[attrname] = fixscope(attribute, new_function)
824
1167
# Is this a D-Bus method?
825
1168
elif getattr(attribute, "_dbus_is_method", False):
826
1169
# Create a new, but exactly alike, function
827
1170
# object. Decorate it to be a new D-Bus method
828
1171
# with the alternate D-Bus interface name. Add it
830
attr[attrname] = (dbus.service.method
832
attribute._dbus_in_signature,
833
attribute._dbus_out_signature)
835
(attribute.func_code,
836
attribute.func_globals,
838
attribute.func_defaults,
839
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:
840
1189
# Is this a D-Bus property?
841
1190
elif getattr(attribute, "_dbus_is_property", False):
842
1191
# Create a new, but exactly alike, function
843
1192
# object, and decorate it to be a new D-Bus
844
1193
# property with the alternate D-Bus interface
845
1194
# name. Add it to the class.
846
attr[attrname] = (dbus_service_property
848
attribute._dbus_signature,
849
attribute._dbus_access,
851
._dbus_get_args_options
854
(attribute.func_code,
855
attribute.func_globals,
857
attribute.func_defaults,
858
attribute.func_closure)))
859
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"})
861
1252
class ClientDBus(Client, DBusObjectWithProperties):
862
1253
"""A Client class using D-Bus
869
1260
runtime_expansions = (Client.runtime_expansions
870
+ ("dbus_object_path",))
1261
+ ("dbus_object_path", ))
1263
_interface = "se.recompile.Mandos.Client"
872
1265
# dbus.service.Object doesn't use super(), so we can't either.
874
1267
def __init__(self, bus = None, *args, **kwargs):
875
self._approvals_pending = 0
877
1269
Client.__init__(self, *args, **kwargs)
878
1270
# Only now, when this client is initialized, can it show up on
880
client_object_name = unicode(self.name).translate(
1272
client_object_name = str(self.name).translate(
881
1273
{ord("."): ord("_"),
882
1274
ord("-"): ord("_")})
883
self.dbus_object_path = (dbus.ObjectPath
884
("/clients/" + client_object_name))
1275
self.dbus_object_path = dbus.ObjectPath(
1276
"/clients/" + client_object_name)
885
1277
DBusObjectWithProperties.__init__(self, self.bus,
886
1278
self.dbus_object_path)
888
def notifychangeproperty(transform_func,
889
dbus_name, type_func=lambda x: x,
1280
def notifychangeproperty(transform_func, dbus_name,
1281
type_func=lambda x: x,
1283
invalidate_only=False,
1284
_interface=_interface):
891
1285
""" Modify a variable so that it's a property which announces
892
1286
its changes to DBus.
894
transform_fun: Function that takes a value and transforms it
1288
transform_fun: Function that takes a value and a variant_level
1289
and transforms it to a D-Bus type.
896
1290
dbus_name: D-Bus name of the variable
897
1291
type_func: Function that transform the value before sending it
898
1292
to the D-Bus. Default: no transform
899
1293
variant_level: D-Bus variant level. Default: 1
901
attrname = "_{0}".format(dbus_name)
1295
attrname = "_{}".format(dbus_name)
902
1297
def setter(self, value):
903
1298
if hasattr(self, "dbus_object_path"):
904
1299
if (not hasattr(self, attrname) or
905
1300
type_func(getattr(self, attrname, None))
906
1301
!= type_func(value)):
907
dbus_value = transform_func(type_func(value),
909
self.PropertyChanged(dbus.String(dbus_name),
1303
self.PropertiesChanged(
1304
_interface, dbus.Dictionary(),
1305
dbus.Array((dbus_name, )))
1307
dbus_value = transform_func(
1309
variant_level = variant_level)
1310
self.PropertyChanged(dbus.String(dbus_name),
1312
self.PropertiesChanged(
1314
dbus.Dictionary({ dbus.String(dbus_name):
911
1317
setattr(self, attrname, value)
913
1319
return property(lambda self: getattr(self, attrname), setter)
916
1321
expires = notifychangeproperty(datetime_to_dbus, "Expires")
917
1322
approvals_pending = notifychangeproperty(dbus.Boolean,
918
1323
"ApprovalPending",
920
1325
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
921
1326
last_enabled = notifychangeproperty(datetime_to_dbus,
923
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
924
type_func = lambda checker:
1328
checker = notifychangeproperty(
1329
dbus.Boolean, "CheckerRunning",
1330
type_func = lambda checker: checker is not None)
926
1331
last_checked_ok = notifychangeproperty(datetime_to_dbus,
927
1332
"LastCheckedOK")
1333
last_checker_status = notifychangeproperty(dbus.Int16,
1334
"LastCheckerStatus")
928
1335
last_approval_request = notifychangeproperty(
929
1336
datetime_to_dbus, "LastApprovalRequest")
930
1337
approved_by_default = notifychangeproperty(dbus.Boolean,
931
1338
"ApprovedByDefault")
932
approval_delay = notifychangeproperty(dbus.UInt16,
935
_timedelta_to_milliseconds)
1339
approval_delay = notifychangeproperty(
1340
dbus.UInt64, "ApprovalDelay",
1341
type_func = lambda td: td.total_seconds() * 1000)
936
1342
approval_duration = notifychangeproperty(
937
dbus.UInt16, "ApprovalDuration",
938
type_func = _timedelta_to_milliseconds)
1343
dbus.UInt64, "ApprovalDuration",
1344
type_func = lambda td: td.total_seconds() * 1000)
939
1345
host = notifychangeproperty(dbus.String, "Host")
940
timeout = notifychangeproperty(dbus.UInt16, "Timeout",
942
_timedelta_to_milliseconds)
1346
timeout = notifychangeproperty(
1347
dbus.UInt64, "Timeout",
1348
type_func = lambda td: td.total_seconds() * 1000)
943
1349
extended_timeout = notifychangeproperty(
944
dbus.UInt16, "ExtendedTimeout",
945
type_func = _timedelta_to_milliseconds)
946
interval = notifychangeproperty(dbus.UInt16,
949
_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)
950
1355
checker_command = notifychangeproperty(dbus.String, "Checker")
1356
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1357
invalidate_only=True)
952
1359
del notifychangeproperty
1175
1590
return datetime_to_dbus(self.last_approval_request)
1177
1592
# Timeout - property
1178
@dbus_service_property(_interface, signature="t",
1593
@dbus_service_property(_interface,
1179
1595
access="readwrite")
1180
1596
def Timeout_dbus_property(self, value=None):
1181
1597
if value is None: # get
1182
return dbus.UInt64(self.timeout_milliseconds())
1598
return dbus.UInt64(self.timeout.total_seconds() * 1000)
1599
old_timeout = self.timeout
1183
1600
self.timeout = datetime.timedelta(0, 0, 0, value)
1184
if getattr(self, "disable_initiator_tag", None) is None:
1186
# Reschedule timeout
1187
gobject.source_remove(self.disable_initiator_tag)
1188
self.disable_initiator_tag = None
1190
time_to_die = (self.
1191
_timedelta_to_milliseconds((self
1196
if time_to_die <= 0:
1197
# The timeout has passed
1200
self.expires = (datetime.datetime.utcnow()
1201
+ datetime.timedelta(milliseconds =
1203
self.disable_initiator_tag = (gobject.timeout_add
1204
(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),
1206
1617
# ExtendedTimeout - property
1207
@dbus_service_property(_interface, signature="t",
1618
@dbus_service_property(_interface,
1208
1620
access="readwrite")
1209
1621
def ExtendedTimeout_dbus_property(self, value=None):
1210
1622
if value is None: # get
1211
return dbus.UInt64(self.extended_timeout_milliseconds())
1623
return dbus.UInt64(self.extended_timeout.total_seconds()
1212
1625
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1214
1627
# Interval - property
1215
@dbus_service_property(_interface, signature="t",
1628
@dbus_service_property(_interface,
1216
1630
access="readwrite")
1217
1631
def Interval_dbus_property(self, value=None):
1218
1632
if value is None: # get
1219
return dbus.UInt64(self.interval_milliseconds())
1633
return dbus.UInt64(self.interval.total_seconds() * 1000)
1220
1634
self.interval = datetime.timedelta(0, 0, 0, value)
1221
1635
if getattr(self, "checker_initiator_tag", None) is None:
1223
# Reschedule checker run
1224
gobject.source_remove(self.checker_initiator_tag)
1225
self.checker_initiator_tag = (gobject.timeout_add
1226
(value, self.start_checker))
1227
self.start_checker() # Start one now, too
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
1229
1644
# Checker - property
1230
@dbus_service_property(_interface, signature="s",
1645
@dbus_service_property(_interface,
1231
1647
access="readwrite")
1232
1648
def Checker_dbus_property(self, value=None):
1233
1649
if value is None: # get
1234
1650
return dbus.String(self.checker_command)
1235
self.checker_command = value
1651
self.checker_command = str(value)
1237
1653
# CheckerRunning - property
1238
@dbus_service_property(_interface, signature="b",
1654
@dbus_service_property(_interface,
1239
1656
access="readwrite")
1240
1657
def CheckerRunning_dbus_property(self, value=None):
1241
1658
if value is None: # get
1467
1883
def fingerprint(openpgp):
1468
1884
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1469
1885
# New GnuTLS "datum" with the OpenPGP public key
1470
datum = (gnutls.library.types
1471
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1474
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)))
1475
1890
# New empty GnuTLS certificate
1476
1891
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1477
(gnutls.library.functions
1478
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1892
gnutls.library.functions.gnutls_openpgp_crt_init(
1479
1894
# Import the OpenPGP public key into the certificate
1480
(gnutls.library.functions
1481
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1482
gnutls.library.constants
1483
.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)
1484
1898
# Verify the self signature in the key
1485
1899
crtverify = ctypes.c_uint()
1486
(gnutls.library.functions
1487
.gnutls_openpgp_crt_verify_self(crt, 0,
1488
ctypes.byref(crtverify)))
1900
gnutls.library.functions.gnutls_openpgp_crt_verify_self(
1901
crt, 0, ctypes.byref(crtverify))
1489
1902
if crtverify.value != 0:
1490
1903
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1491
raise (gnutls.errors.CertificateSecurityError
1904
raise gnutls.errors.CertificateSecurityError(
1493
1906
# New buffer for the fingerprint
1494
1907
buf = ctypes.create_string_buffer(20)
1495
1908
buf_len = ctypes.c_size_t()
1496
1909
# Get the fingerprint from the certificate into the buffer
1497
(gnutls.library.functions
1498
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1499
ctypes.byref(buf_len)))
1910
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint(
1911
crt, ctypes.byref(buf), ctypes.byref(buf_len))
1500
1912
# Deinit the certificate
1501
1913
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1502
1914
# Convert the buffer to a Python bytestring
1503
1915
fpr = ctypes.string_at(buf, buf_len.value)
1504
1916
# Convert the bytestring to hexadecimal notation
1505
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
1917
hex_fpr = binascii.hexlify(fpr).upper()
1509
1921
class MultiprocessingMixIn(object):
1510
1922
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1511
1924
def sub_process_main(self, request, address):
1513
1926
self.finish_request(request, address)
1515
1928
self.handle_error(request, address)
1516
1929
self.close_request(request)
1518
1931
def process_request(self, request, address):
1519
1932
"""Start a new process to process the request."""
1520
1933
proc = multiprocessing.Process(target = self.sub_process_main,
1934
args = (request, address))
1527
1939
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1528
1940
""" adds a pipe to the MixIn """
1529
1942
def process_request(self, request, client_address):
1530
1943
"""Overrides and wraps the original process_request().
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}"
1728
2266
def string_to_delta(interval):
1729
2267
"""Parse a string and return a datetime.timedelta
1862
2397
"debug": "False",
1864
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2399
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2400
":+SIGN-DSA-SHA256",
1865
2401
"servicename": "Mandos",
1866
2402
"use_dbus": "True",
1867
2403
"use_ipv6": "True",
1868
2404
"debuglevel": "",
2407
"statedir": "/var/lib/mandos",
2408
"foreground": "False",
1871
2412
# Parse config file for server-global settings
1872
2413
server_config = configparser.SafeConfigParser(server_defaults)
1873
2414
del server_defaults
1874
server_config.read(os.path.join(options.configdir,
2415
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1876
2416
# Convert the SafeConfigParser object to a dict
1877
2417
server_settings = server_config.defaults()
1878
2418
# Use the appropriate methods on the non-string config options
1879
for option in ("debug", "use_dbus", "use_ipv6"):
2419
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
1880
2420
server_settings[option] = server_config.getboolean("DEFAULT",
1882
2422
if server_settings["port"]:
1883
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
1885
2434
del server_config
1887
2436
# Override the settings from the config file with command line
1888
2437
# options, if set.
1889
2438
for option in ("interface", "address", "port", "debug",
1890
"priority", "servicename", "configdir",
1891
"use_dbus", "use_ipv6", "debuglevel"):
2439
"priority", "servicename", "configdir", "use_dbus",
2440
"use_ipv6", "debuglevel", "restore", "statedir",
2441
"socket", "foreground", "zeroconf"):
1892
2442
value = getattr(options, option)
1893
2443
if value is not None:
1894
2444
server_settings[option] = value
1896
2446
# Force all strings to be unicode
1897
2447
for option in server_settings.keys():
1898
if type(server_settings[option]) is str:
1899
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
1900
2458
# Now we have our good server settings in "server_settings"
1902
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")
1904
2467
# For convenience
1905
2468
debug = server_settings["debug"]
1906
2469
debuglevel = server_settings["debuglevel"]
1907
2470
use_dbus = server_settings["use_dbus"]
1908
2471
use_ipv6 = server_settings["use_ipv6"]
2472
stored_state_path = os.path.join(server_settings["statedir"],
2474
foreground = server_settings["foreground"]
2475
zeroconf = server_settings["zeroconf"]
2478
initlogger(debug, logging.DEBUG)
2483
level = getattr(logging, debuglevel.upper())
2484
initlogger(debug, level)
1910
2486
if server_settings["servicename"] != "Mandos":
1911
syslogger.setFormatter(logging.Formatter
1912
('Mandos (%s) [%%(process)d]:'
1913
' %%(levelname)s: %%(message)s'
1914
% server_settings["servicename"]))
2487
syslogger.setFormatter(
2488
logging.Formatter('Mandos ({}) [%(process)d]:'
2489
' %(levelname)s: %(message)s'.format(
2490
server_settings["servicename"])))
1916
2492
# Parse config file with clients
1917
client_defaults = { "timeout": "5m",
1918
"extended_timeout": "15m",
1920
"checker": "fping -q -- %%(host)s",
1922
"approval_delay": "0s",
1923
"approval_duration": "1s",
1925
client_config = configparser.SafeConfigParser(client_defaults)
2493
client_config = configparser.SafeConfigParser(Client
1926
2495
client_config.read(os.path.join(server_settings["configdir"],
1927
2496
"clients.conf"))
1929
2498
global mandos_dbus_service
1930
2499
mandos_dbus_service = None
1932
tcp_server = MandosServer((server_settings["address"],
1933
server_settings["port"]),
1935
interface=(server_settings["interface"]
1939
server_settings["priority"],
1942
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"
1944
pidfile = open(pidfilename, "w")
1946
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,
1949
uid = pwd.getpwnam("_mandos").pw_uid
1950
gid = pwd.getpwnam("_mandos").pw_gid
2523
for name in ("_mandos", "mandos", "nobody"):
1953
uid = pwd.getpwnam("mandos").pw_uid
1954
gid = pwd.getpwnam("mandos").pw_gid
2525
uid = pwd.getpwnam(name).pw_uid
2526
gid = pwd.getpwnam(name).pw_gid
1955
2528
except KeyError:
1957
uid = pwd.getpwnam("nobody").pw_uid
1958
gid = pwd.getpwnam("nobody").pw_gid
1965
2536
except OSError as error:
1966
if error[0] != errno.EPERM:
1969
if not debug and not debuglevel:
1970
syslogger.setLevel(logging.WARNING)
1971
console.setLevel(logging.WARNING)
1973
level = getattr(logging, debuglevel.upper())
1974
syslogger.setLevel(level)
1975
console.setLevel(level)
2537
if error.errno != errno.EPERM:
1978
2541
# Enable all possible GnuTLS debugging
1985
2548
def debug_gnutls(level, string):
1986
2549
logger.debug("GnuTLS: %s", string[:-1])
1988
(gnutls.library.functions
1989
.gnutls_global_set_log_function(debug_gnutls))
2551
gnutls.library.functions.gnutls_global_set_log_function(
1991
2554
# Redirect stdin so all checkers get /dev/null
1992
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2555
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1993
2556
os.dup2(null, sys.stdin.fileno())
1997
# No console logging
1998
logger.removeHandler(console)
2000
2560
# Need to fork before connecting to D-Bus
2002
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()
2005
2569
global main_loop
2006
2570
# From the Avahi example code
2007
DBusGMainLoop(set_as_default=True )
2571
DBusGMainLoop(set_as_default=True)
2008
2572
main_loop = gobject.MainLoop()
2009
2573
bus = dbus.SystemBus()
2010
2574
# End of Avahi example code
2013
2577
bus_name = dbus.service.BusName("se.recompile.Mandos",
2014
bus, do_not_queue=True)
2015
old_bus_name = (dbus.service.BusName
2016
("se.bsnet.fukt.Mandos", bus,
2018
except dbus.exceptions.NameExistsException as e:
2019
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)
2020
2585
use_dbus = False
2021
2586
server_settings["use_dbus"] = False
2022
2587
tcp_server.use_dbus = False
2023
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2024
service = AvahiService(name = server_settings["servicename"],
2025
servicetype = "_mandos._tcp",
2026
protocol = protocol, bus = bus)
2027
if server_settings["interface"]:
2028
service.interface = (if_nametoindex
2029
(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"))
2031
2599
global multiprocessing_manager
2032
2600
multiprocessing_manager = multiprocessing.Manager()
2034
2602
client_class = Client
2036
client_class = functools.partial(ClientDBusTransitional,
2038
def client_config_items(config, section):
2039
special_settings = {
2040
"approved_by_default":
2041
lambda: config.getboolean(section,
2042
"approved_by_default"),
2044
for name, value in config.items(section):
2604
client_class = functools.partial(ClientDBus, bus = bus)
2606
client_settings = Client.config_parser(client_config)
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:
2618
# Get client data and settings from last running state.
2619
if server_settings["restore"]:
2621
with open(stored_state_path, "rb") as stored_state:
2622
clients_data, old_client_settings = pickle.load(
2624
os.remove(stored_state_path)
2625
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:",
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:
2644
# Decide which value to use after restoring saved state.
2645
# We have three different values: Old config file,
2646
# new config file, and saved state.
2647
# New config value takes precedence if it differs from old
2648
# config value, otherwise use saved state.
2649
for name, value in client_settings[client_name].items():
2651
# For each value in new config, check if it
2652
# differs from the old config value (Except for
2653
# the "secret" attribute)
2654
if (name != "secret"
2656
old_client_settings[client_name][name])):
2657
client[name] = value
2661
# 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"]))
2681
client["enabled"] = False
2683
client["expires"] = (
2684
datetime.datetime.utcnow()
2685
+ client["timeout"])
2686
logger.debug("Last checker succeeded,"
2687
" keeping {} enabled".format(
2046
yield (name, special_settings[name]())
2050
tcp_server.clients.update(set(
2051
client_class(name = section,
2052
config= dict(client_config_items(
2053
client_config, section)))
2054
for section in client_config.sections()))
2690
client["secret"] = pgp.decrypt(
2691
client["encrypted_secret"],
2692
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)
2055
2715
if not tcp_server.clients:
2056
2716
logger.warning("No clients defined")
2062
pidfile.write(str(pid) + "\n".encode("utf-8"))
2065
logger.error("Could not write to file %r with PID %d",
2068
# "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",
2070
2728
del pidfilename
2072
signal.signal(signal.SIGINT, signal.SIG_IGN)
2074
2730
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2075
2731
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2078
class MandosDBusService(dbus.service.Object):
2735
@alternate_dbus_interfaces(
2736
{ "se.recompile.Mandos": "se.bsnet.fukt.Mandos" })
2737
class MandosDBusService(DBusObjectWithProperties):
2079
2738
"""A D-Bus proxy object"""
2080
2740
def __init__(self):
2081
2741
dbus.service.Object.__init__(self, bus, "/")
2082
2743
_interface = "se.recompile.Mandos"
2745
@dbus_interface_annotations(_interface)
2748
"org.freedesktop.DBus.Property.EmitsChangedSignal":
2084
2751
@dbus.service.signal(_interface, signature="o")
2085
2752
def ClientAdded(self, objpath):
2130
class MandosDBusServiceTransitional(MandosDBusService):
2131
__metaclass__ = AlternateDBusNamesMetaclass
2132
mandos_dbus_service = MandosDBusServiceTransitional()
2797
mandos_dbus_service = MandosDBusService()
2135
2800
"Cleanup function; run on exit"
2138
2804
multiprocessing.active_children()
2806
if not (tcp_server.clients or client_settings):
2809
# Store client before exiting. Secrets are encrypted with key
2810
# based on what config file has. If config file is
2811
# removed/edited, old secret will thus be unrecovable.
2813
with PGPEngine() as pgp:
2814
for client in tcp_server.clients.itervalues():
2815
key = client_settings[client.name]["secret"]
2816
client.encrypted_secret = pgp.encrypt(client.secret,
2820
# A list of attributes that can not be pickled
2822
exclude = { "bus", "changedstate", "secret",
2823
"checker", "server_settings" }
2824
for name, typ in inspect.getmembers(dbus.service
2828
client_dict["encrypted_secret"] = (client
2830
for attr in client.client_structure:
2831
if attr not in exclude:
2832
client_dict[attr] = getattr(client, attr)
2834
clients[client.name] = client_dict
2835
del client_settings[client.name]["secret"]
2838
with tempfile.NamedTemporaryFile(
2842
dir=os.path.dirname(stored_state_path),
2843
delete=False) as stored_state:
2844
pickle.dump((clients, client_settings), stored_state)
2845
tempname = stored_state.name
2846
os.rename(tempname, stored_state_path)
2847
except (IOError, OSError) as e:
2853
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
2854
logger.warning("Could not save persistent state: {}"
2855
.format(os.strerror(e.errno)))
2857
logger.warning("Could not save persistent state:",
2861
# Delete all clients, and settings from config
2139
2862
while tcp_server.clients:
2140
client = tcp_server.clients.pop()
2863
name, client = tcp_server.clients.popitem()
2142
2865
client.remove_from_connection()
2143
client.disable_hook = None
2144
2866
# Don't signal anything except ClientRemoved
2145
2867
client.disable(quiet=True)
2147
2869
# Emit D-Bus signal
2148
mandos_dbus_service.ClientRemoved(client
2870
mandos_dbus_service.ClientRemoved(
2871
client.dbus_object_path, client.name)
2872
client_settings.clear()
2152
2874
atexit.register(cleanup)
2154
for client in tcp_server.clients:
2876
for client in tcp_server.clients.itervalues():
2156
2878
# Emit D-Bus signal
2157
2879
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2880
# Need to initiate checking of clients
2882
client.init_checker()
2160
2884
tcp_server.enable()
2161
2885
tcp_server.server_activate()
2163
2887
# Find out what port we got
2164
service.port = tcp_server.socket.getsockname()[1]
2889
service.port = tcp_server.socket.getsockname()[1]
2166
2891
logger.info("Now listening on address %r, port %d,"
2167
" flowinfo %d, scope_id %d"
2168
% tcp_server.socket.getsockname())
2892
" flowinfo %d, scope_id %d",
2893
*tcp_server.socket.getsockname())
2170
logger.info("Now listening on address %r, port %d"
2171
% tcp_server.socket.getsockname())
2895
logger.info("Now listening on address %r, port %d",
2896
*tcp_server.socket.getsockname())
2173
2898
#service.interface = tcp_server.socket.getsockname()[3]
2176
# From the Avahi example code
2179
except dbus.exceptions.DBusException as error:
2180
logger.critical("DBusException: %s", error)
2183
# End of Avahi example code
2902
# From the Avahi example code
2905
except dbus.exceptions.DBusException as error:
2906
logger.critical("D-Bus Exception", exc_info=error)
2909
# End of Avahi example code
2185
2911
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2186
2912
lambda *args, **kwargs: