101
82
except ImportError:
102
83
SO_BINDTODEVICE = None
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
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)
237
104
class AvahiError(Exception):
238
105
def __init__(self, value, *args, **kwargs):
239
106
self.value = value
240
return super(AvahiError, self).__init__(value, *args,
107
super(AvahiError, self).__init__(value, *args, **kwargs)
108
def __unicode__(self):
109
return unicode(repr(self.value))
244
111
class AvahiServiceError(AvahiError):
248
114
class AvahiGroupError(AvahiError):
462
298
interval: datetime.timedelta(); How often to start a new checker
463
299
last_approval_request: datetime.datetime(); (UTC) or None
464
300
last_checked_ok: datetime.datetime(); (UTC) or None
465
last_checker_status: integer between 0 and 255 reflecting exit
466
status of last checker. -1 reflects crashed
467
checker, -2 means no checker completed yet.
468
last_checker_signal: The signal which killed the last checker, if
469
last_checker_status is -1
470
last_enabled: datetime.datetime(); (UTC) or None
301
last_enabled: datetime.datetime(); (UTC)
471
302
name: string; from the config file, used in log messages and
472
303
D-Bus identifiers
473
304
secret: bytestring; sent verbatim (over TLS) to client
474
305
timeout: datetime.timedelta(); How long from last_checked_ok
475
306
until this client is disabled
476
extended_timeout: extra long timeout when secret has been sent
307
extended_timeout: extra long timeout when password has been sent
477
308
runtime_expansions: Allowed attributes for runtime expansion.
478
309
expires: datetime.datetime(); time (UTC) when a client will be
479
310
disabled, or None
480
server_settings: The server_settings dict from main()
483
313
runtime_expansions = ("approval_delay", "approval_duration",
484
"created", "enabled", "expires",
485
"fingerprint", "host", "interval",
486
"last_approval_request", "last_checked_ok",
314
"created", "enabled", "fingerprint",
315
"host", "interval", "last_checked_ok",
487
316
"last_enabled", "name", "timeout")
490
"extended_timeout": "PT15M",
492
"checker": "fping -q -- %%(host)s",
494
"approval_delay": "PT0S",
495
"approval_duration": "PT1S",
496
"approved_by_default": "True",
501
def config_parser(config):
502
"""Construct a new dict of client settings of this form:
503
{ client_name: {setting_name: value, ...}, ...}
504
with exceptions for any special settings as defined above.
505
NOTE: Must be a pure function. Must return the same result
506
value given the same arguments.
509
for client_name in config.sections():
510
section = dict(config.items(client_name))
511
client = settings[client_name] = {}
513
client["host"] = section["host"]
514
# Reformat values from string types to Python types
515
client["approved_by_default"] = config.getboolean(
516
client_name, "approved_by_default")
517
client["enabled"] = config.getboolean(client_name,
520
# Uppercase and remove spaces from fingerprint for later
521
# comparison purposes with return value from the
522
# fingerprint() function
523
client["fingerprint"] = (section["fingerprint"].upper()
525
if "secret" in section:
526
client["secret"] = section["secret"].decode("base64")
527
elif "secfile" in section:
528
with open(os.path.expanduser(os.path.expandvars
529
(section["secfile"])),
531
client["secret"] = secfile.read()
533
raise TypeError("No secret or secfile for section {}"
535
client["timeout"] = string_to_delta(section["timeout"])
536
client["extended_timeout"] = string_to_delta(
537
section["extended_timeout"])
538
client["interval"] = string_to_delta(section["interval"])
539
client["approval_delay"] = string_to_delta(
540
section["approval_delay"])
541
client["approval_duration"] = string_to_delta(
542
section["approval_duration"])
543
client["checker_command"] = section["checker"]
544
client["last_approval_request"] = None
545
client["last_checked_ok"] = None
546
client["last_checker_status"] = -2
550
def __init__(self, settings, name = None, server_settings=None):
318
def timeout_milliseconds(self):
319
"Return the 'timeout' attribute in milliseconds"
320
return _timedelta_to_milliseconds(self.timeout)
322
def extended_timeout_milliseconds(self):
323
"Return the 'extended_timeout' attribute in milliseconds"
324
return _timedelta_to_milliseconds(self.extended_timeout)
326
def interval_milliseconds(self):
327
"Return the 'interval' attribute in milliseconds"
328
return _timedelta_to_milliseconds(self.interval)
330
def approval_delay_milliseconds(self):
331
return _timedelta_to_milliseconds(self.approval_delay)
333
def __init__(self, name = None, disable_hook=None, config=None):
334
"""Note: the 'checker' key in 'config' sets the
335
'checker_command' attribute and *not* the 'checker'
552
if server_settings is None:
554
self.server_settings = server_settings
555
# adding all client settings
556
for setting, value in settings.items():
557
setattr(self, setting, value)
560
if not hasattr(self, "last_enabled"):
561
self.last_enabled = datetime.datetime.utcnow()
562
if not hasattr(self, "expires"):
563
self.expires = (datetime.datetime.utcnow()
566
self.last_enabled = None
569
340
logger.debug("Creating client %r", self.name)
341
# Uppercase and remove spaces from fingerprint for later
342
# comparison purposes with return value from the fingerprint()
344
self.fingerprint = (config["fingerprint"].upper()
570
346
logger.debug(" Fingerprint: %s", self.fingerprint)
571
self.created = settings.get("created",
572
datetime.datetime.utcnow())
574
# attributes specific for this server instance
347
if "secret" in config:
348
self.secret = config["secret"].decode("base64")
349
elif "secfile" in config:
350
with open(os.path.expanduser(os.path.expandvars
351
(config["secfile"])),
353
self.secret = secfile.read()
355
raise TypeError("No secret or secfile for client %s"
357
self.host = config.get("host", "")
358
self.created = datetime.datetime.utcnow()
360
self.last_approval_request = None
361
self.last_enabled = None
362
self.last_checked_ok = None
363
self.timeout = string_to_delta(config["timeout"])
364
self.extended_timeout = string_to_delta(config["extended_timeout"])
365
self.interval = string_to_delta(config["interval"])
366
self.disable_hook = disable_hook
575
367
self.checker = None
576
368
self.checker_initiator_tag = None
577
369
self.disable_initiator_tag = None
578
371
self.checker_callback_tag = None
372
self.checker_command = config["checker"]
579
373
self.current_checker_command = None
374
self.last_connect = None
375
self._approved = None
376
self.approved_by_default = config.get("approved_by_default",
581
378
self.approvals_pending = 0
582
self.changedstate = multiprocessing_manager.Condition(
583
multiprocessing_manager.Lock())
584
self.client_structure = [attr
585
for attr in self.__dict__.iterkeys()
586
if not attr.startswith("_")]
587
self.client_structure.append("client_structure")
589
for name, t in inspect.getmembers(
590
type(self), lambda obj: isinstance(obj, property)):
591
if not name.startswith("_"):
592
self.client_structure.append(name)
379
self.approval_delay = string_to_delta(
380
config["approval_delay"])
381
self.approval_duration = string_to_delta(
382
config["approval_duration"])
383
self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())
594
# Send notice to process children that client state has changed
595
385
def send_changedstate(self):
596
with self.changedstate:
597
self.changedstate.notify_all()
386
self.changedstate.acquire()
387
self.changedstate.notify_all()
388
self.changedstate.release()
599
390
def enable(self):
600
391
"""Start this client's checker and timeout hooks"""
601
392
if getattr(self, "enabled", False):
602
393
# Already enabled
395
self.send_changedstate()
396
# Schedule a new checker to be started an 'interval' from now,
397
# and every interval from then on.
398
self.checker_initiator_tag = (gobject.timeout_add
399
(self.interval_milliseconds(),
401
# Schedule a disable() when 'timeout' has passed
604
402
self.expires = datetime.datetime.utcnow() + self.timeout
403
self.disable_initiator_tag = (gobject.timeout_add
404
(self.timeout_milliseconds(),
605
406
self.enabled = True
606
407
self.last_enabled = datetime.datetime.utcnow()
608
self.send_changedstate()
408
# Also start a new checker *right now*.
610
411
def disable(self, quiet=True):
611
412
"""Disable this client."""
612
413
if not getattr(self, "enabled", False):
416
self.send_changedstate()
615
418
logger.info("Disabling client %s", self.name)
616
if getattr(self, "disable_initiator_tag", None) is not None:
419
if getattr(self, "disable_initiator_tag", False):
617
420
gobject.source_remove(self.disable_initiator_tag)
618
421
self.disable_initiator_tag = None
619
422
self.expires = None
620
if getattr(self, "checker_initiator_tag", None) is not None:
423
if getattr(self, "checker_initiator_tag", False):
621
424
gobject.source_remove(self.checker_initiator_tag)
622
425
self.checker_initiator_tag = None
623
426
self.stop_checker()
427
if self.disable_hook:
428
self.disable_hook(self)
624
429
self.enabled = False
626
self.send_changedstate()
627
430
# Do not run this again if called by a gobject.timeout_add
630
433
def __del__(self):
434
self.disable_hook = None
633
def init_checker(self):
634
# Schedule a new checker to be started an 'interval' from now,
635
# and every interval from then on.
636
if self.checker_initiator_tag is not None:
637
gobject.source_remove(self.checker_initiator_tag)
638
self.checker_initiator_tag = gobject.timeout_add(
639
int(self.interval.total_seconds() * 1000),
641
# Schedule a disable() when 'timeout' has passed
642
if self.disable_initiator_tag is not None:
643
gobject.source_remove(self.disable_initiator_tag)
644
self.disable_initiator_tag = gobject.timeout_add(
645
int(self.timeout.total_seconds() * 1000), self.disable)
646
# Also start a new checker *right now*.
649
def checker_callback(self, source, condition, connection,
437
def checker_callback(self, pid, condition, command):
651
438
"""The checker has completed, so take appropriate actions."""
652
439
self.checker_callback_tag = None
653
440
self.checker = None
654
# Read return code from connection (see call_pipe)
655
returncode = connection.recv()
659
self.last_checker_status = returncode
660
self.last_checker_signal = None
661
if self.last_checker_status == 0:
441
if os.WIFEXITED(condition):
442
exitstatus = os.WEXITSTATUS(condition)
662
444
logger.info("Checker for %(name)s succeeded",
664
446
self.checked_ok()
666
logger.info("Checker for %(name)s failed", vars(self))
448
logger.info("Checker for %(name)s failed",
668
self.last_checker_status = -1
669
self.last_checker_signal = -returncode
670
451
logger.warning("Checker for %(name)s crashed?",
674
def checked_ok(self):
675
"""Assert that the client has been seen, alive and well."""
676
self.last_checked_ok = datetime.datetime.utcnow()
677
self.last_checker_status = 0
678
self.last_checker_signal = None
681
def bump_timeout(self, timeout=None):
682
"""Bump up the timeout for this client."""
454
def checked_ok(self, timeout=None):
455
"""Bump up the timeout for this client.
457
This should only be called when the client has been seen,
683
460
if timeout is None:
684
461
timeout = self.timeout
685
if self.disable_initiator_tag is not None:
686
gobject.source_remove(self.disable_initiator_tag)
687
self.disable_initiator_tag = None
688
if getattr(self, "enabled", False):
689
self.disable_initiator_tag = gobject.timeout_add(
690
int(timeout.total_seconds() * 1000), self.disable)
691
self.expires = datetime.datetime.utcnow() + timeout
462
self.last_checked_ok = datetime.datetime.utcnow()
463
gobject.source_remove(self.disable_initiator_tag)
464
self.expires = datetime.datetime.utcnow() + timeout
465
self.disable_initiator_tag = (gobject.timeout_add
466
(_timedelta_to_milliseconds(timeout),
693
469
def need_approval(self):
694
470
self.last_approval_request = datetime.datetime.utcnow()
699
475
If a checker already exists, leave it running and do
701
477
# The reason for not killing a running checker is that if we
702
# did that, and if a checker (for some reason) started running
703
# slowly and taking more than 'interval' time, then the client
704
# would inevitably timeout, since no checker would get a
705
# chance to run to completion. If we instead leave running
478
# did that, then if a checker (for some reason) started
479
# running slowly and taking more than 'interval' time, the
480
# client would inevitably timeout, since no checker would get
481
# a chance to run to completion. If we instead leave running
706
482
# checkers alone, the checker would have to take more time
707
483
# than 'timeout' for the client to be disabled, which is as it
710
if self.checker is not None and not self.checker.is_alive():
711
logger.warning("Checker was not alive; joining")
486
# If a checker exists, make sure it is not a zombie
488
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
489
except (AttributeError, OSError) as error:
490
if (isinstance(error, OSError)
491
and error.errno != errno.ECHILD):
495
logger.warning("Checker was a zombie")
496
gobject.source_remove(self.checker_callback_tag)
497
self.checker_callback(pid, status,
498
self.current_checker_command)
714
499
# Start a new checker if needed
715
500
if self.checker is None:
716
# Escape attributes for the shell
718
attr: re.escape(str(getattr(self, attr)))
719
for attr in self.runtime_expansions }
721
command = self.checker_command % escaped_attrs
722
except TypeError as error:
723
logger.error('Could not format string "%s"',
724
self.checker_command,
726
return True # Try again later
502
# In case checker_command has exactly one % operator
503
command = self.checker_command % self.host
505
# Escape attributes for the shell
506
escaped_attrs = dict(
508
re.escape(unicode(str(getattr(self, attr, "")),
512
self.runtime_expansions)
515
command = self.checker_command % escaped_attrs
516
except TypeError as error:
517
logger.error('Could not format string "%s":'
518
' %s', self.checker_command, error)
519
return True # Try again later
727
520
self.current_checker_command = command
728
logger.info("Starting checker %r for %s", command,
730
# We don't need to redirect stdout and stderr, since
731
# in normal mode, that is already done by daemon(),
732
# and in debug mode we don't want to. (Stdin is
733
# always replaced by /dev/null.)
734
# The exception is when not debugging but nevertheless
735
# running in the foreground; use the previously
737
popen_args = { "close_fds": True,
740
if (not self.server_settings["debug"]
741
and self.server_settings["foreground"]):
742
popen_args.update({"stdout": wnull,
744
pipe = multiprocessing.Pipe(duplex = False)
745
self.checker = multiprocessing.Process(
747
args = (pipe[1], subprocess.call, command),
750
self.checker_callback_tag = gobject.io_add_watch(
751
pipe[0].fileno(), gobject.IO_IN,
752
self.checker_callback, pipe[0], command)
522
logger.info("Starting checker %r for %s",
524
# We don't need to redirect stdout and stderr, since
525
# in normal mode, that is already done by daemon(),
526
# and in debug mode we don't want to. (Stdin is
527
# always replaced by /dev/null.)
528
self.checker = subprocess.Popen(command,
531
self.checker_callback_tag = (gobject.child_watch_add
533
self.checker_callback,
535
# The checker may have completed before the gobject
536
# watch was added. Check for this.
537
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
539
gobject.source_remove(self.checker_callback_tag)
540
self.checker_callback(pid, status, command)
541
except OSError as error:
542
logger.error("Failed to start subprocess: %s",
753
544
# Re-run this periodically if run by gobject.timeout_add
954
695
if not hasattr(value, "variant_level"):
955
properties[name] = value
957
properties[name] = type(value)(
958
value, variant_level = value.variant_level + 1)
959
return dbus.Dictionary(properties, signature="sv")
961
@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
962
def PropertiesChanged(self, interface_name, changed_properties,
963
invalidated_properties):
964
"""Standard D-Bus PropertiesChanged() signal, see D-Bus
698
all[name] = type(value)(value, variant_level=
699
value.variant_level+1)
700
return dbus.Dictionary(all, signature="sv")
969
702
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
970
703
out_signature="s",
971
704
path_keyword='object_path',
972
705
connection_keyword='connection')
973
706
def Introspect(self, object_path, connection):
974
"""Overloading of standard D-Bus method.
976
Inserts property tags and interface annotation tags.
707
"""Standard D-Bus method, overloaded to insert property tags.
978
709
xmlstring = dbus.service.Object.Introspect(self, object_path,
981
712
document = xml.dom.minidom.parseString(xmlstring)
983
713
def make_tag(document, name, prop):
984
714
e = document.createElement("property")
985
715
e.setAttribute("name", name)
986
716
e.setAttribute("type", prop._dbus_signature)
987
717
e.setAttribute("access", prop._dbus_access)
990
719
for if_tag in document.getElementsByTagName("interface"):
992
720
for tag in (make_tag(document, name, prop)
994
in self._get_all_dbus_things("property")
722
in self._get_all_dbus_properties()
995
723
if prop._dbus_interface
996
724
== if_tag.getAttribute("name")):
997
725
if_tag.appendChild(tag)
998
# Add annotation tags
999
for typ in ("method", "signal", "property"):
1000
for tag in if_tag.getElementsByTagName(typ):
1002
for name, prop in (self.
1003
_get_all_dbus_things(typ)):
1004
if (name == tag.getAttribute("name")
1005
and prop._dbus_interface
1006
== if_tag.getAttribute("name")):
1007
annots.update(getattr(
1008
prop, "_dbus_annotations", {}))
1009
for name, value in annots.items():
1010
ann_tag = document.createElement(
1012
ann_tag.setAttribute("name", name)
1013
ann_tag.setAttribute("value", value)
1014
tag.appendChild(ann_tag)
1015
# Add interface annotation tags
1016
for annotation, value in dict(
1017
itertools.chain.from_iterable(
1018
annotations().items()
1019
for name, annotations
1020
in self._get_all_dbus_things("interface")
1021
if name == if_tag.getAttribute("name")
1023
ann_tag = document.createElement("annotation")
1024
ann_tag.setAttribute("name", annotation)
1025
ann_tag.setAttribute("value", value)
1026
if_tag.appendChild(ann_tag)
1027
726
# Add the names to the return values for the
1028
727
# "org.freedesktop.DBus.Properties" methods
1029
728
if (if_tag.getAttribute("name")
1044
743
except (AttributeError, xml.dom.DOMException,
1045
744
xml.parsers.expat.ExpatError) as error:
1046
745
logger.error("Failed to override Introspection method",
1048
747
return xmlstring
1051
def datetime_to_dbus(dt, variant_level=0):
750
def datetime_to_dbus (dt, variant_level=0):
1052
751
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1054
753
return dbus.String("", variant_level = variant_level)
1055
return dbus.String(dt.isoformat(), variant_level=variant_level)
1058
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1059
"""A class decorator; applied to a subclass of
1060
dbus.service.Object, it will add alternate D-Bus attributes with
1061
interface names according to the "alt_interface_names" mapping.
1064
@alternate_dbus_interfaces({"org.example.Interface":
1065
"net.example.AlternateInterface"})
1066
class SampleDBusObject(dbus.service.Object):
1067
@dbus.service.method("org.example.Interface")
1068
def SampleDBusMethod():
1071
The above "SampleDBusMethod" on "SampleDBusObject" will be
1072
reachable via two interfaces: "org.example.Interface" and
1073
"net.example.AlternateInterface", the latter of which will have
1074
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1075
"true", unless "deprecate" is passed with a False value.
1077
This works for methods and signals, and also for D-Bus properties
1078
(from DBusObjectWithProperties) and interfaces (from the
1079
dbus_interface_annotations decorator).
754
return dbus.String(dt.isoformat(),
755
variant_level=variant_level)
757
class AlternateDBusNamesMetaclass(DBusObjectWithProperties.__metaclass__):
758
"""Applied to an empty subclass of a D-Bus object, this metaclass
759
will add additional D-Bus attributes matching a certain pattern.
1083
for orig_interface_name, alt_interface_name in (
1084
alt_interface_names.items()):
1086
interface_names = set()
1087
# Go though all attributes of the class
1088
for attrname, attribute in inspect.getmembers(cls):
761
def __new__(mcs, name, bases, attr):
762
# Go through all the base classes which could have D-Bus
763
# methods, signals, or properties in them
764
for base in (b for b in bases
765
if issubclass(b, dbus.service.Object)):
766
# Go though all attributes of the base class
767
for attrname, attribute in inspect.getmembers(base):
1089
768
# Ignore non-D-Bus attributes, and D-Bus attributes
1090
769
# with the wrong interface name
1091
770
if (not hasattr(attribute, "_dbus_interface")
1092
or not attribute._dbus_interface.startswith(
1093
orig_interface_name)):
771
or not attribute._dbus_interface
772
.startswith("se.recompile.Mandos")):
1095
774
# Create an alternate D-Bus interface name based on
1096
775
# the current name
1097
alt_interface = attribute._dbus_interface.replace(
1098
orig_interface_name, alt_interface_name)
1099
interface_names.add(alt_interface)
776
alt_interface = (attribute._dbus_interface
777
.replace("se.recompile.Mandos",
778
"se.bsnet.fukt.Mandos"))
1100
779
# Is this a D-Bus signal?
1101
780
if getattr(attribute, "_dbus_is_signal", False):
1102
if sys.version_info.major == 2:
1103
# Extract the original non-method undecorated
1104
# function by black magic
1105
nonmethod_func = (dict(
781
# Extract the original non-method function by
783
nonmethod_func = (dict(
1106
784
zip(attribute.func_code.co_freevars,
1107
attribute.__closure__))
1108
["func"].cell_contents)
1110
nonmethod_func = attribute
785
attribute.__closure__))["func"]
1111
787
# Create a new, but exactly alike, function
1112
788
# object, and decorate it to be a new D-Bus signal
1113
789
# with the alternate D-Bus interface name
1114
if sys.version_info.major == 2:
1115
new_function = types.FunctionType(
1116
nonmethod_func.func_code,
1117
nonmethod_func.func_globals,
1118
nonmethod_func.func_name,
1119
nonmethod_func.func_defaults,
1120
nonmethod_func.func_closure)
1122
new_function = types.FunctionType(
1123
nonmethod_func.__code__,
1124
nonmethod_func.__globals__,
1125
nonmethod_func.__name__,
1126
nonmethod_func.__defaults__,
1127
nonmethod_func.__closure__)
1128
new_function = (dbus.service.signal(
1130
attribute._dbus_signature)(new_function))
1131
# Copy annotations, if any
1133
new_function._dbus_annotations = dict(
1134
attribute._dbus_annotations)
1135
except AttributeError:
790
new_function = (dbus.service.signal
792
attribute._dbus_signature)
794
nonmethod_func.func_code,
795
nonmethod_func.func_globals,
796
nonmethod_func.func_name,
797
nonmethod_func.func_defaults,
798
nonmethod_func.func_closure)))
1137
799
# Define a creator of a function to call both the
1138
# original and alternate functions, so both the
1139
# original and alternate signals gets sent when
1140
# the function is called
800
# old and new functions, so both the old and new
801
# signals gets sent when the function is called
1141
802
def fixscope(func1, func2):
1142
803
"""This function is a scope container to pass
1143
804
func1 and func2 to the "call_both" function
1144
805
outside of its arguments"""
1146
806
def call_both(*args, **kwargs):
1147
807
"""This function will emit two D-Bus
1148
808
signals by calling func1 and func2"""
1149
809
func1(*args, **kwargs)
1150
810
func2(*args, **kwargs)
1152
811
return call_both
1153
812
# Create the "call_both" function and add it to
1155
attr[attrname] = fixscope(attribute, new_function)
814
attr[attrname] = fixscope(attribute,
1156
816
# Is this a D-Bus method?
1157
817
elif getattr(attribute, "_dbus_is_method", False):
1158
818
# Create a new, but exactly alike, function
1159
819
# object. Decorate it to be a new D-Bus method
1160
820
# with the alternate D-Bus interface name. Add it
1163
dbus.service.method(
1165
attribute._dbus_in_signature,
1166
attribute._dbus_out_signature)
1167
(types.FunctionType(attribute.func_code,
1168
attribute.func_globals,
1169
attribute.func_name,
1170
attribute.func_defaults,
1171
attribute.func_closure)))
1172
# Copy annotations, if any
1174
attr[attrname]._dbus_annotations = dict(
1175
attribute._dbus_annotations)
1176
except AttributeError:
822
attr[attrname] = (dbus.service.method
824
attribute._dbus_in_signature,
825
attribute._dbus_out_signature)
827
(attribute.func_code,
828
attribute.func_globals,
830
attribute.func_defaults,
831
attribute.func_closure)))
1178
832
# Is this a D-Bus property?
1179
833
elif getattr(attribute, "_dbus_is_property", False):
1180
834
# Create a new, but exactly alike, function
1181
835
# object, and decorate it to be a new D-Bus
1182
836
# property with the alternate D-Bus interface
1183
837
# name. Add it to the class.
1184
attr[attrname] = (dbus_service_property(
1185
alt_interface, attribute._dbus_signature,
1186
attribute._dbus_access,
1187
attribute._dbus_get_args_options
1189
(types.FunctionType(
1190
attribute.func_code,
1191
attribute.func_globals,
1192
attribute.func_name,
1193
attribute.func_defaults,
1194
attribute.func_closure)))
1195
# Copy annotations, if any
1197
attr[attrname]._dbus_annotations = dict(
1198
attribute._dbus_annotations)
1199
except AttributeError:
1201
# Is this a D-Bus interface?
1202
elif getattr(attribute, "_dbus_is_interface", False):
1203
# Create a new, but exactly alike, function
1204
# object. Decorate it to be a new D-Bus interface
1205
# with the alternate D-Bus interface name. Add it
1208
dbus_interface_annotations(alt_interface)
1209
(types.FunctionType(attribute.func_code,
1210
attribute.func_globals,
1211
attribute.func_name,
1212
attribute.func_defaults,
1213
attribute.func_closure)))
1215
# Deprecate all alternate interfaces
1216
iname="_AlternateDBusNames_interface_annotation{}"
1217
for interface_name in interface_names:
1219
@dbus_interface_annotations(interface_name)
1221
return { "org.freedesktop.DBus.Deprecated":
1223
# Find an unused name
1224
for aname in (iname.format(i)
1225
for i in itertools.count()):
1226
if aname not in attr:
1230
# Replace the class with a new subclass of it with
1231
# methods, signals, etc. as created above.
1232
cls = type(b"{}Alternate".format(cls.__name__),
1239
@alternate_dbus_interfaces({"se.recompile.Mandos":
1240
"se.bsnet.fukt.Mandos"})
838
attr[attrname] = (dbus_service_property
840
attribute._dbus_signature,
841
attribute._dbus_access,
843
._dbus_get_args_options
846
(attribute.func_code,
847
attribute.func_globals,
849
attribute.func_defaults,
850
attribute.func_closure)))
851
return type.__new__(mcs, name, bases, attr)
1241
853
class ClientDBus(Client, DBusObjectWithProperties):
1242
854
"""A Client class using D-Bus
1249
861
runtime_expansions = (Client.runtime_expansions
1250
+ ("dbus_object_path", ))
1252
_interface = "se.recompile.Mandos.Client"
862
+ ("dbus_object_path",))
1254
864
# dbus.service.Object doesn't use super(), so we can't either.
1256
866
def __init__(self, bus = None, *args, **kwargs):
867
self._approvals_pending = 0
1258
869
Client.__init__(self, *args, **kwargs)
1259
870
# Only now, when this client is initialized, can it show up on
1261
client_object_name = str(self.name).translate(
872
client_object_name = unicode(self.name).translate(
1262
873
{ord("."): ord("_"),
1263
874
ord("-"): ord("_")})
1264
self.dbus_object_path = dbus.ObjectPath(
1265
"/clients/" + client_object_name)
875
self.dbus_object_path = (dbus.ObjectPath
876
("/clients/" + client_object_name))
1266
877
DBusObjectWithProperties.__init__(self, self.bus,
1267
878
self.dbus_object_path)
1269
def notifychangeproperty(transform_func, dbus_name,
1270
type_func=lambda x: x,
1272
invalidate_only=False,
1273
_interface=_interface):
880
def notifychangeproperty(transform_func,
881
dbus_name, type_func=lambda x: x,
1274
883
""" Modify a variable so that it's a property which announces
1275
884
its changes to DBus.
1277
transform_fun: Function that takes a value and a variant_level
1278
and transforms it to a D-Bus type.
886
transform_fun: Function that takes a value and transforms it
1279
888
dbus_name: D-Bus name of the variable
1280
889
type_func: Function that transform the value before sending it
1281
890
to the D-Bus. Default: no transform
1282
891
variant_level: D-Bus variant level. Default: 1
1284
attrname = "_{}".format(dbus_name)
1286
894
def setter(self, value):
895
old_value = real_value[0]
896
real_value[0] = value
1287
897
if hasattr(self, "dbus_object_path"):
1288
if (not hasattr(self, attrname) or
1289
type_func(getattr(self, attrname, None))
1290
!= type_func(value)):
1292
self.PropertiesChanged(
1293
_interface, dbus.Dictionary(),
1294
dbus.Array((dbus_name, )))
1296
dbus_value = transform_func(
1298
variant_level = variant_level)
1299
self.PropertyChanged(dbus.String(dbus_name),
1301
self.PropertiesChanged(
1303
dbus.Dictionary({ dbus.String(dbus_name):
1306
setattr(self, attrname, value)
898
if type_func(old_value) != type_func(real_value[0]):
899
dbus_value = transform_func(type_func(real_value[0]),
901
self.PropertyChanged(dbus.String(dbus_name),
1308
return property(lambda self: getattr(self, attrname), setter)
904
return property(lambda self: real_value[0], setter)
1310
907
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1311
908
approvals_pending = notifychangeproperty(dbus.Boolean,
1314
911
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1315
912
last_enabled = notifychangeproperty(datetime_to_dbus,
1317
checker = notifychangeproperty(
1318
dbus.Boolean, "CheckerRunning",
1319
type_func = lambda checker: checker is not None)
914
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
915
type_func = lambda checker: checker is not None)
1320
916
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1321
917
"LastCheckedOK")
1322
last_checker_status = notifychangeproperty(dbus.Int16,
1323
"LastCheckerStatus")
1324
last_approval_request = notifychangeproperty(
1325
datetime_to_dbus, "LastApprovalRequest")
918
last_approval_request = notifychangeproperty(datetime_to_dbus,
919
"LastApprovalRequest")
1326
920
approved_by_default = notifychangeproperty(dbus.Boolean,
1327
921
"ApprovedByDefault")
1328
approval_delay = notifychangeproperty(
1329
dbus.UInt64, "ApprovalDelay",
1330
type_func = lambda td: td.total_seconds() * 1000)
1331
approval_duration = notifychangeproperty(
1332
dbus.UInt64, "ApprovalDuration",
1333
type_func = lambda td: td.total_seconds() * 1000)
922
approval_delay = notifychangeproperty(dbus.UInt16, "ApprovalDelay",
923
type_func = _timedelta_to_milliseconds)
924
approval_duration = notifychangeproperty(dbus.UInt16, "ApprovalDuration",
925
type_func = _timedelta_to_milliseconds)
1334
926
host = notifychangeproperty(dbus.String, "Host")
1335
timeout = notifychangeproperty(
1336
dbus.UInt64, "Timeout",
1337
type_func = lambda td: td.total_seconds() * 1000)
1338
extended_timeout = notifychangeproperty(
1339
dbus.UInt64, "ExtendedTimeout",
1340
type_func = lambda td: td.total_seconds() * 1000)
1341
interval = notifychangeproperty(
1342
dbus.UInt64, "Interval",
1343
type_func = lambda td: td.total_seconds() * 1000)
927
timeout = notifychangeproperty(dbus.UInt16, "Timeout",
928
type_func = _timedelta_to_milliseconds)
929
extended_timeout = notifychangeproperty(dbus.UInt16, "ExtendedTimeout",
930
type_func = _timedelta_to_milliseconds)
931
interval = notifychangeproperty(dbus.UInt16, "Interval",
932
type_func = _timedelta_to_milliseconds)
1344
933
checker_command = notifychangeproperty(dbus.String, "Checker")
1345
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1346
invalidate_only=True)
1348
935
del notifychangeproperty
1579
1158
return datetime_to_dbus(self.last_approval_request)
1581
1160
# Timeout - property
1582
@dbus_service_property(_interface,
1161
@dbus_service_property(_interface, signature="t",
1584
1162
access="readwrite")
1585
1163
def Timeout_dbus_property(self, value=None):
1586
1164
if value is None: # get
1587
return dbus.UInt64(self.timeout.total_seconds() * 1000)
1588
old_timeout = self.timeout
1165
return dbus.UInt64(self.timeout_milliseconds())
1589
1166
self.timeout = datetime.timedelta(0, 0, 0, value)
1590
# Reschedule disabling
1592
now = datetime.datetime.utcnow()
1593
self.expires += self.timeout - old_timeout
1594
if self.expires <= now:
1595
# The timeout has passed
1598
if (getattr(self, "disable_initiator_tag", None)
1601
gobject.source_remove(self.disable_initiator_tag)
1602
self.disable_initiator_tag = gobject.timeout_add(
1603
int((self.expires - now).total_seconds() * 1000),
1167
if getattr(self, "disable_initiator_tag", None) is None:
1169
# Reschedule timeout
1170
gobject.source_remove(self.disable_initiator_tag)
1171
self.disable_initiator_tag = None
1173
time_to_die = (self.
1174
_timedelta_to_milliseconds((self
1179
if time_to_die <= 0:
1180
# The timeout has passed
1183
self.expires = (datetime.datetime.utcnow()
1184
+ datetime.timedelta(milliseconds = time_to_die))
1185
self.disable_initiator_tag = (gobject.timeout_add
1186
(time_to_die, self.disable))
1606
1188
# ExtendedTimeout - property
1607
@dbus_service_property(_interface,
1189
@dbus_service_property(_interface, signature="t",
1609
1190
access="readwrite")
1610
1191
def ExtendedTimeout_dbus_property(self, value=None):
1611
1192
if value is None: # get
1612
return dbus.UInt64(self.extended_timeout.total_seconds()
1193
return dbus.UInt64(self.extended_timeout_milliseconds())
1614
1194
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1616
1196
# Interval - property
1617
@dbus_service_property(_interface,
1197
@dbus_service_property(_interface, signature="t",
1619
1198
access="readwrite")
1620
1199
def Interval_dbus_property(self, value=None):
1621
1200
if value is None: # get
1622
return dbus.UInt64(self.interval.total_seconds() * 1000)
1201
return dbus.UInt64(self.interval_milliseconds())
1623
1202
self.interval = datetime.timedelta(0, 0, 0, value)
1624
1203
if getattr(self, "checker_initiator_tag", None) is None:
1627
# Reschedule checker run
1628
gobject.source_remove(self.checker_initiator_tag)
1629
self.checker_initiator_tag = gobject.timeout_add(
1630
value, self.start_checker)
1631
self.start_checker() # Start one now, too
1205
# Reschedule checker run
1206
gobject.source_remove(self.checker_initiator_tag)
1207
self.checker_initiator_tag = (gobject.timeout_add
1208
(value, self.start_checker))
1209
self.start_checker() # Start one now, too
1633
1211
# Checker - property
1634
@dbus_service_property(_interface,
1212
@dbus_service_property(_interface, signature="s",
1636
1213
access="readwrite")
1637
1214
def Checker_dbus_property(self, value=None):
1638
1215
if value is None: # get
1639
1216
return dbus.String(self.checker_command)
1640
self.checker_command = str(value)
1217
self.checker_command = value
1642
1219
# CheckerRunning - property
1643
@dbus_service_property(_interface,
1220
@dbus_service_property(_interface, signature="b",
1645
1221
access="readwrite")
1646
1222
def CheckerRunning_dbus_property(self, value=None):
1647
1223
if value is None: # get
1872
1448
def fingerprint(openpgp):
1873
1449
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1874
1450
# New GnuTLS "datum" with the OpenPGP public key
1875
datum = gnutls.library.types.gnutls_datum_t(
1876
ctypes.cast(ctypes.c_char_p(openpgp),
1877
ctypes.POINTER(ctypes.c_ubyte)),
1878
ctypes.c_uint(len(openpgp)))
1451
datum = (gnutls.library.types
1452
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1455
ctypes.c_uint(len(openpgp))))
1879
1456
# New empty GnuTLS certificate
1880
1457
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1881
gnutls.library.functions.gnutls_openpgp_crt_init(
1458
(gnutls.library.functions
1459
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1883
1460
# Import the OpenPGP public key into the certificate
1884
gnutls.library.functions.gnutls_openpgp_crt_import(
1885
crt, ctypes.byref(datum),
1886
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
1461
(gnutls.library.functions
1462
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1463
gnutls.library.constants
1464
.GNUTLS_OPENPGP_FMT_RAW))
1887
1465
# Verify the self signature in the key
1888
1466
crtverify = ctypes.c_uint()
1889
gnutls.library.functions.gnutls_openpgp_crt_verify_self(
1890
crt, 0, ctypes.byref(crtverify))
1467
(gnutls.library.functions
1468
.gnutls_openpgp_crt_verify_self(crt, 0,
1469
ctypes.byref(crtverify)))
1891
1470
if crtverify.value != 0:
1892
1471
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1893
raise gnutls.errors.CertificateSecurityError(
1472
raise (gnutls.errors.CertificateSecurityError
1895
1474
# New buffer for the fingerprint
1896
1475
buf = ctypes.create_string_buffer(20)
1897
1476
buf_len = ctypes.c_size_t()
1898
1477
# Get the fingerprint from the certificate into the buffer
1899
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint(
1900
crt, ctypes.byref(buf), ctypes.byref(buf_len))
1478
(gnutls.library.functions
1479
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1480
ctypes.byref(buf_len)))
1901
1481
# Deinit the certificate
1902
1482
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1903
1483
# Convert the buffer to a Python bytestring
1904
1484
fpr = ctypes.string_at(buf, buf_len.value)
1905
1485
# Convert the bytestring to hexadecimal notation
1906
hex_fpr = binascii.hexlify(fpr).upper()
1486
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
1910
1490
class MultiprocessingMixIn(object):
1911
1491
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1913
1492
def sub_process_main(self, request, address):
1915
1494
self.finish_request(request, address)
1917
1496
self.handle_error(request, address)
1918
1497
self.close_request(request)
1920
1499
def process_request(self, request, address):
1921
1500
"""Start a new process to process the request."""
1922
proc = multiprocessing.Process(target = self.sub_process_main,
1923
args = (request, address))
1501
multiprocessing.Process(target = self.sub_process_main,
1502
args = (request, address)).start()
1928
1505
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1929
1506
""" adds a pipe to the MixIn """
1931
1507
def process_request(self, request, client_address):
1932
1508
"""Overrides and wraps the original process_request().
2159
def rfc3339_duration_to_delta(duration):
2160
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2162
>>> rfc3339_duration_to_delta("P7D")
2163
datetime.timedelta(7)
2164
>>> rfc3339_duration_to_delta("PT60S")
2165
datetime.timedelta(0, 60)
2166
>>> rfc3339_duration_to_delta("PT60M")
2167
datetime.timedelta(0, 3600)
2168
>>> rfc3339_duration_to_delta("PT24H")
2169
datetime.timedelta(1)
2170
>>> rfc3339_duration_to_delta("P1W")
2171
datetime.timedelta(7)
2172
>>> rfc3339_duration_to_delta("PT5M30S")
2173
datetime.timedelta(0, 330)
2174
>>> rfc3339_duration_to_delta("P1DT3M20S")
2175
datetime.timedelta(1, 200)
2178
# Parsing an RFC 3339 duration with regular expressions is not
2179
# possible - there would have to be multiple places for the same
2180
# values, like seconds. The current code, while more esoteric, is
2181
# cleaner without depending on a parsing library. If Python had a
2182
# built-in library for parsing we would use it, but we'd like to
2183
# avoid excessive use of external libraries.
2185
# New type for defining tokens, syntax, and semantics all-in-one
2186
Token = collections.namedtuple("Token", (
2187
"regexp", # To match token; if "value" is not None, must have
2188
# a "group" containing digits
2189
"value", # datetime.timedelta or None
2190
"followers")) # Tokens valid after this token
2191
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2192
# the "duration" ABNF definition in RFC 3339, Appendix A.
2193
token_end = Token(re.compile(r"$"), None, frozenset())
2194
token_second = Token(re.compile(r"(\d+)S"),
2195
datetime.timedelta(seconds=1),
2196
frozenset((token_end, )))
2197
token_minute = Token(re.compile(r"(\d+)M"),
2198
datetime.timedelta(minutes=1),
2199
frozenset((token_second, token_end)))
2200
token_hour = Token(re.compile(r"(\d+)H"),
2201
datetime.timedelta(hours=1),
2202
frozenset((token_minute, token_end)))
2203
token_time = Token(re.compile(r"T"),
2205
frozenset((token_hour, token_minute,
2207
token_day = Token(re.compile(r"(\d+)D"),
2208
datetime.timedelta(days=1),
2209
frozenset((token_time, token_end)))
2210
token_month = Token(re.compile(r"(\d+)M"),
2211
datetime.timedelta(weeks=4),
2212
frozenset((token_day, token_end)))
2213
token_year = Token(re.compile(r"(\d+)Y"),
2214
datetime.timedelta(weeks=52),
2215
frozenset((token_month, token_end)))
2216
token_week = Token(re.compile(r"(\d+)W"),
2217
datetime.timedelta(weeks=1),
2218
frozenset((token_end, )))
2219
token_duration = Token(re.compile(r"P"), None,
2220
frozenset((token_year, token_month,
2221
token_day, token_time,
2223
# Define starting values
2224
value = datetime.timedelta() # Value so far
2226
followers = frozenset((token_duration, )) # Following valid tokens
2227
s = duration # String left to parse
2228
# Loop until end token is found
2229
while found_token is not token_end:
2230
# Search for any currently valid tokens
2231
for token in followers:
2232
match = token.regexp.match(s)
2233
if match is not None:
2235
if token.value is not None:
2236
# Value found, parse digits
2237
factor = int(match.group(1), 10)
2238
# Add to value so far
2239
value += factor * token.value
2240
# Strip token from string
2241
s = token.regexp.sub("", s, 1)
2244
# Set valid next tokens
2245
followers = found_token.followers
2248
# No currently valid tokens were found
2249
raise ValueError("Invalid RFC 3339 duration: {!r}"
2255
1693
def string_to_delta(interval):
2256
1694
"""Parse a string and return a datetime.timedelta
2386
1827
"debug": "False",
2388
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2389
":+SIGN-RSA-SHA224:+SIGN-RSA-RMD160",
1829
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2390
1830
"servicename": "Mandos",
2391
1831
"use_dbus": "True",
2392
1832
"use_ipv6": "True",
2393
1833
"debuglevel": "",
2396
"statedir": "/var/lib/mandos",
2397
"foreground": "False",
2401
1836
# Parse config file for server-global settings
2402
1837
server_config = configparser.SafeConfigParser(server_defaults)
2403
1838
del server_defaults
2404
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1839
server_config.read(os.path.join(options.configdir,
2405
1841
# Convert the SafeConfigParser object to a dict
2406
1842
server_settings = server_config.defaults()
2407
1843
# Use the appropriate methods on the non-string config options
2408
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
1844
for option in ("debug", "use_dbus", "use_ipv6"):
2409
1845
server_settings[option] = server_config.getboolean("DEFAULT",
2411
1847
if server_settings["port"]:
2412
1848
server_settings["port"] = server_config.getint("DEFAULT",
2414
if server_settings["socket"]:
2415
server_settings["socket"] = server_config.getint("DEFAULT",
2417
# Later, stdin will, and stdout and stderr might, be dup'ed
2418
# over with an opened os.devnull. But we don't want this to
2419
# happen with a supplied network socket.
2420
if 0 <= server_settings["socket"] <= 2:
2421
server_settings["socket"] = os.dup(server_settings
2423
1850
del server_config
2425
1852
# Override the settings from the config file with command line
2426
1853
# options, if set.
2427
1854
for option in ("interface", "address", "port", "debug",
2428
"priority", "servicename", "configdir", "use_dbus",
2429
"use_ipv6", "debuglevel", "restore", "statedir",
2430
"socket", "foreground", "zeroconf"):
1855
"priority", "servicename", "configdir",
1856
"use_dbus", "use_ipv6", "debuglevel"):
2431
1857
value = getattr(options, option)
2432
1858
if value is not None:
2433
1859
server_settings[option] = value
2435
1861
# Force all strings to be unicode
2436
1862
for option in server_settings.keys():
2437
if isinstance(server_settings[option], bytes):
2438
server_settings[option] = (server_settings[option]
2440
# Force all boolean options to be boolean
2441
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2442
"foreground", "zeroconf"):
2443
server_settings[option] = bool(server_settings[option])
2444
# Debug implies foreground
2445
if server_settings["debug"]:
2446
server_settings["foreground"] = True
1863
if type(server_settings[option]) is str:
1864
server_settings[option] = unicode(server_settings[option])
2447
1865
# Now we have our good server settings in "server_settings"
2449
1867
##################################################################
2451
if (not server_settings["zeroconf"]
2452
and not (server_settings["port"]
2453
or server_settings["socket"] != "")):
2454
parser.error("Needs port or socket to work without Zeroconf")
2456
1869
# For convenience
2457
1870
debug = server_settings["debug"]
2458
1871
debuglevel = server_settings["debuglevel"]
2459
1872
use_dbus = server_settings["use_dbus"]
2460
1873
use_ipv6 = server_settings["use_ipv6"]
2461
stored_state_path = os.path.join(server_settings["statedir"],
2463
foreground = server_settings["foreground"]
2464
zeroconf = server_settings["zeroconf"]
2467
initlogger(debug, logging.DEBUG)
2472
level = getattr(logging, debuglevel.upper())
2473
initlogger(debug, level)
2475
1875
if server_settings["servicename"] != "Mandos":
2476
syslogger.setFormatter(
2477
logging.Formatter('Mandos ({}) [%(process)d]:'
2478
' %(levelname)s: %(message)s'.format(
2479
server_settings["servicename"])))
1876
syslogger.setFormatter(logging.Formatter
1877
('Mandos (%s) [%%(process)d]:'
1878
' %%(levelname)s: %%(message)s'
1879
% server_settings["servicename"]))
2481
1881
# Parse config file with clients
2482
client_config = configparser.SafeConfigParser(Client
1882
client_defaults = { "timeout": "5m",
1883
"extended_timeout": "15m",
1885
"checker": "fping -q -- %%(host)s",
1887
"approval_delay": "0s",
1888
"approval_duration": "1s",
1890
client_config = configparser.SafeConfigParser(client_defaults)
2484
1891
client_config.read(os.path.join(server_settings["configdir"],
2485
1892
"clients.conf"))
2487
1894
global mandos_dbus_service
2488
1895
mandos_dbus_service = None
2491
if server_settings["socket"] != "":
2492
socketfd = server_settings["socket"]
2493
tcp_server = MandosServer(
2494
(server_settings["address"], server_settings["port"]),
2496
interface=(server_settings["interface"] or None),
2498
gnutls_priority=server_settings["priority"],
2502
pidfilename = "/run/mandos.pid"
2503
if not os.path.isdir("/run/."):
2504
pidfilename = "/var/run/mandos.pid"
1897
tcp_server = MandosServer((server_settings["address"],
1898
server_settings["port"]),
1900
interface=(server_settings["interface"]
1904
server_settings["priority"],
1907
pidfilename = "/var/run/mandos.pid"
2507
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
2508
except IOError as e:
2509
logger.error("Could not open file %r", pidfilename,
1909
pidfile = open(pidfilename, "w")
1911
logger.error("Could not open file %r", pidfilename)
2512
for name in ("_mandos", "mandos", "nobody"):
1914
uid = pwd.getpwnam("_mandos").pw_uid
1915
gid = pwd.getpwnam("_mandos").pw_gid
2514
uid = pwd.getpwnam(name).pw_uid
2515
gid = pwd.getpwnam(name).pw_gid
1918
uid = pwd.getpwnam("mandos").pw_uid
1919
gid = pwd.getpwnam("mandos").pw_gid
2517
1920
except KeyError:
1922
uid = pwd.getpwnam("nobody").pw_uid
1923
gid = pwd.getpwnam("nobody").pw_gid
2525
1930
except OSError as error:
2526
if error.errno != errno.EPERM:
1931
if error[0] != errno.EPERM:
1934
if not debug and not debuglevel:
1935
syslogger.setLevel(logging.WARNING)
1936
console.setLevel(logging.WARNING)
1938
level = getattr(logging, debuglevel.upper())
1939
syslogger.setLevel(level)
1940
console.setLevel(level)
2530
1943
# Enable all possible GnuTLS debugging
2537
1950
def debug_gnutls(level, string):
2538
1951
logger.debug("GnuTLS: %s", string[:-1])
2540
gnutls.library.functions.gnutls_global_set_log_function(
1953
(gnutls.library.functions
1954
.gnutls_global_set_log_function(debug_gnutls))
2543
1956
# Redirect stdin so all checkers get /dev/null
2544
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1957
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2545
1958
os.dup2(null, sys.stdin.fileno())
1962
# No console logging
1963
logger.removeHandler(console)
2549
1965
# Need to fork before connecting to D-Bus
2551
1967
# Close all input and output, do double fork, etc.
2554
# multiprocessing will use threads, so before we use gobject we
2555
# need to inform gobject that threads will be used.
2556
gobject.threads_init()
2558
1970
global main_loop
2559
1971
# From the Avahi example code
2560
DBusGMainLoop(set_as_default=True)
1972
DBusGMainLoop(set_as_default=True )
2561
1973
main_loop = gobject.MainLoop()
2562
1974
bus = dbus.SystemBus()
2563
1975
# End of Avahi example code
2566
1978
bus_name = dbus.service.BusName("se.recompile.Mandos",
2569
old_bus_name = dbus.service.BusName(
2570
"se.bsnet.fukt.Mandos", bus,
2572
except dbus.exceptions.DBusException as e:
2573
logger.error("Disabling D-Bus:", exc_info=e)
1979
bus, do_not_queue=True)
1980
old_bus_name = dbus.service.BusName("se.bsnet.fukt.Mandos",
1981
bus, do_not_queue=True)
1982
except dbus.exceptions.NameExistsException as e:
1983
logger.error(unicode(e) + ", disabling D-Bus")
2574
1984
use_dbus = False
2575
1985
server_settings["use_dbus"] = False
2576
1986
tcp_server.use_dbus = False
2578
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2579
service = AvahiServiceToSyslog(
2580
name = server_settings["servicename"],
2581
servicetype = "_mandos._tcp",
2582
protocol = protocol,
2584
if server_settings["interface"]:
2585
service.interface = if_nametoindex(
2586
server_settings["interface"].encode("utf-8"))
1987
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1988
service = AvahiService(name = server_settings["servicename"],
1989
servicetype = "_mandos._tcp",
1990
protocol = protocol, bus = bus)
1991
if server_settings["interface"]:
1992
service.interface = (if_nametoindex
1993
(str(server_settings["interface"])))
2588
1995
global multiprocessing_manager
2589
1996
multiprocessing_manager = multiprocessing.Manager()
2591
1998
client_class = Client
2593
client_class = functools.partial(ClientDBus, bus = bus)
2595
client_settings = Client.config_parser(client_config)
2596
old_client_settings = {}
2599
# This is used to redirect stdout and stderr for checker processes
2601
wnull = open(os.devnull, "w") # A writable /dev/null
2602
# Only used if server is running in foreground but not in debug
2604
if debug or not foreground:
2607
# Get client data and settings from last running state.
2608
if server_settings["restore"]:
2610
with open(stored_state_path, "rb") as stored_state:
2611
clients_data, old_client_settings = pickle.load(
2613
os.remove(stored_state_path)
2614
except IOError as e:
2615
if e.errno == errno.ENOENT:
2616
logger.warning("Could not load persistent state:"
2617
" {}".format(os.strerror(e.errno)))
2619
logger.critical("Could not load persistent state:",
2622
except EOFError as e:
2623
logger.warning("Could not load persistent state: "
2627
with PGPEngine() as pgp:
2628
for client_name, client in clients_data.items():
2629
# Skip removed clients
2630
if client_name not in client_settings:
2633
# Decide which value to use after restoring saved state.
2634
# We have three different values: Old config file,
2635
# new config file, and saved state.
2636
# New config value takes precedence if it differs from old
2637
# config value, otherwise use saved state.
2638
for name, value in client_settings[client_name].items():
2640
# For each value in new config, check if it
2641
# differs from the old config value (Except for
2642
# the "secret" attribute)
2643
if (name != "secret"
2645
old_client_settings[client_name][name])):
2646
client[name] = value
2650
# Clients who has passed its expire date can still be
2651
# enabled if its last checker was successful. A Client
2652
# whose checker succeeded before we stored its state is
2653
# assumed to have successfully run all checkers during
2655
if client["enabled"]:
2656
if datetime.datetime.utcnow() >= client["expires"]:
2657
if not client["last_checked_ok"]:
2659
"disabling client {} - Client never "
2660
"performed a successful checker".format(
2662
client["enabled"] = False
2663
elif client["last_checker_status"] != 0:
2665
"disabling client {} - Client last"
2666
" checker failed with error code"
2669
client["last_checker_status"]))
2670
client["enabled"] = False
2672
client["expires"] = (
2673
datetime.datetime.utcnow()
2674
+ client["timeout"])
2675
logger.debug("Last checker succeeded,"
2676
" keeping {} enabled".format(
2000
client_class = functools.partial(ClientDBusTransitional, bus = bus)
2001
def client_config_items(config, section):
2002
special_settings = {
2003
"approved_by_default":
2004
lambda: config.getboolean(section,
2005
"approved_by_default"),
2007
for name, value in config.items(section):
2679
client["secret"] = pgp.decrypt(
2680
client["encrypted_secret"],
2681
client_settings[client_name]["secret"])
2683
# If decryption fails, we use secret from new settings
2684
logger.debug("Failed to decrypt {} old secret".format(
2686
client["secret"] = (client_settings[client_name]
2689
# Add/remove clients based on new changes made to config
2690
for client_name in (set(old_client_settings)
2691
- set(client_settings)):
2692
del clients_data[client_name]
2693
for client_name in (set(client_settings)
2694
- set(old_client_settings)):
2695
clients_data[client_name] = client_settings[client_name]
2697
# Create all client objects
2698
for client_name, client in clients_data.items():
2699
tcp_server.clients[client_name] = client_class(
2702
server_settings = server_settings)
2009
yield (name, special_settings[name]())
2013
tcp_server.clients.update(set(
2014
client_class(name = section,
2015
config= dict(client_config_items(
2016
client_config, section)))
2017
for section in client_config.sections()))
2704
2018
if not tcp_server.clients:
2705
2019
logger.warning("No clients defined")
2708
if pidfile is not None:
2712
print(pid, file=pidfile)
2714
logger.error("Could not write to file %r with PID %d",
2025
pidfile.write(str(pid) + "\n".encode("utf-8"))
2028
logger.error("Could not write to file %r with PID %d",
2031
# "pidfile" was never created
2717
2033
del pidfilename
2035
signal.signal(signal.SIGINT, signal.SIG_IGN)
2719
2037
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2720
2038
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2724
@alternate_dbus_interfaces(
2725
{ "se.recompile.Mandos": "se.bsnet.fukt.Mandos" })
2726
class MandosDBusService(DBusObjectWithProperties):
2041
class MandosDBusService(dbus.service.Object):
2727
2042
"""A D-Bus proxy object"""
2729
2043
def __init__(self):
2730
2044
dbus.service.Object.__init__(self, bus, "/")
2732
2045
_interface = "se.recompile.Mandos"
2734
@dbus_interface_annotations(_interface)
2737
"org.freedesktop.DBus.Property.EmitsChangedSignal":
2740
2047
@dbus.service.signal(_interface, signature="o")
2741
2048
def ClientAdded(self, objpath):
2786
mandos_dbus_service = MandosDBusService()
2093
class MandosDBusServiceTransitional(MandosDBusService):
2094
__metaclass__ = AlternateDBusNamesMetaclass
2095
mandos_dbus_service = MandosDBusServiceTransitional()
2789
2098
"Cleanup function; run on exit"
2793
multiprocessing.active_children()
2795
if not (tcp_server.clients or client_settings):
2798
# Store client before exiting. Secrets are encrypted with key
2799
# based on what config file has. If config file is
2800
# removed/edited, old secret will thus be unrecovable.
2802
with PGPEngine() as pgp:
2803
for client in tcp_server.clients.itervalues():
2804
key = client_settings[client.name]["secret"]
2805
client.encrypted_secret = pgp.encrypt(client.secret,
2809
# A list of attributes that can not be pickled
2811
exclude = { "bus", "changedstate", "secret",
2812
"checker", "server_settings" }
2813
for name, typ in inspect.getmembers(dbus.service
2817
client_dict["encrypted_secret"] = (client
2819
for attr in client.client_structure:
2820
if attr not in exclude:
2821
client_dict[attr] = getattr(client, attr)
2823
clients[client.name] = client_dict
2824
del client_settings[client.name]["secret"]
2827
with tempfile.NamedTemporaryFile(
2831
dir=os.path.dirname(stored_state_path),
2832
delete=False) as stored_state:
2833
pickle.dump((clients, client_settings), stored_state)
2834
tempname = stored_state.name
2835
os.rename(tempname, stored_state_path)
2836
except (IOError, OSError) as e:
2842
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
2843
logger.warning("Could not save persistent state: {}"
2844
.format(os.strerror(e.errno)))
2846
logger.warning("Could not save persistent state:",
2850
# Delete all clients, and settings from config
2851
2101
while tcp_server.clients:
2852
name, client = tcp_server.clients.popitem()
2102
client = tcp_server.clients.pop()
2854
2104
client.remove_from_connection()
2105
client.disable_hook = None
2855
2106
# Don't signal anything except ClientRemoved
2856
2107
client.disable(quiet=True)
2858
2109
# Emit D-Bus signal
2859
mandos_dbus_service.ClientRemoved(
2860
client.dbus_object_path, client.name)
2861
client_settings.clear()
2110
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
2863
2113
atexit.register(cleanup)
2865
for client in tcp_server.clients.itervalues():
2115
for client in tcp_server.clients:
2867
2117
# Emit D-Bus signal
2868
2118
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2869
# Need to initiate checking of clients
2871
client.init_checker()
2873
2121
tcp_server.enable()
2874
2122
tcp_server.server_activate()
2876
2124
# Find out what port we got
2878
service.port = tcp_server.socket.getsockname()[1]
2125
service.port = tcp_server.socket.getsockname()[1]
2880
2127
logger.info("Now listening on address %r, port %d,"
2881
" flowinfo %d, scope_id %d",
2882
*tcp_server.socket.getsockname())
2128
" flowinfo %d, scope_id %d"
2129
% tcp_server.socket.getsockname())
2884
logger.info("Now listening on address %r, port %d",
2885
*tcp_server.socket.getsockname())
2131
logger.info("Now listening on address %r, port %d"
2132
% tcp_server.socket.getsockname())
2887
2134
#service.interface = tcp_server.socket.getsockname()[3]
2891
# From the Avahi example code
2894
except dbus.exceptions.DBusException as error:
2895
logger.critical("D-Bus Exception", exc_info=error)
2898
# End of Avahi example code
2137
# From the Avahi example code
2140
except dbus.exceptions.DBusException as error:
2141
logger.critical("DBusException: %s", error)
2144
# End of Avahi example code
2900
2146
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2901
2147
lambda *args, **kwargs: