100
82
except ImportError:
101
83
SO_BINDTODEVICE = None
103
if sys.version_info.major == 2:
107
stored_state_file = "clients.pickle"
109
logger = logging.getLogger()
113
if_nametoindex = ctypes.cdll.LoadLibrary(
114
ctypes.util.find_library("c")).if_nametoindex
115
except (OSError, AttributeError):
117
def if_nametoindex(interface):
118
"Get an interface index the hard way, i.e. using fcntl()"
119
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
120
with contextlib.closing(socket.socket()) as s:
121
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
122
struct.pack(b"16s16x", interface))
123
interface_index = struct.unpack("I", ifreq[16:20])[0]
124
return interface_index
127
def initlogger(debug, level=logging.WARNING):
128
"""init logger and add loglevel"""
131
syslogger = (logging.handlers.SysLogHandler(
132
facility = logging.handlers.SysLogHandler.LOG_DAEMON,
133
address = "/dev/log"))
134
syslogger.setFormatter(logging.Formatter
135
('Mandos [%(process)d]: %(levelname)s:'
137
logger.addHandler(syslogger)
140
console = logging.StreamHandler()
141
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
145
logger.addHandler(console)
146
logger.setLevel(level)
149
class PGPError(Exception):
150
"""Exception if encryption/decryption fails"""
154
class PGPEngine(object):
155
"""A simple class for OpenPGP symmetric encryption & decryption"""
158
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
159
self.gnupgargs = ['--batch',
160
'--home', self.tempdir,
168
def __exit__(self, exc_type, exc_value, traceback):
176
if self.tempdir is not None:
177
# Delete contents of tempdir
178
for root, dirs, files in os.walk(self.tempdir,
180
for filename in files:
181
os.remove(os.path.join(root, filename))
183
os.rmdir(os.path.join(root, dirname))
185
os.rmdir(self.tempdir)
188
def password_encode(self, password):
189
# Passphrase can not be empty and can not contain newlines or
190
# NUL bytes. So we prefix it and hex encode it.
191
encoded = b"mandos" + binascii.hexlify(password)
192
if len(encoded) > 2048:
193
# GnuPG can't handle long passwords, so encode differently
194
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
195
.replace(b"\n", b"\\n")
196
.replace(b"\0", b"\\x00"))
199
def encrypt(self, data, password):
200
passphrase = self.password_encode(password)
201
with tempfile.NamedTemporaryFile(
202
dir=self.tempdir) as passfile:
203
passfile.write(passphrase)
205
proc = subprocess.Popen(['gpg', '--symmetric',
209
stdin = subprocess.PIPE,
210
stdout = subprocess.PIPE,
211
stderr = subprocess.PIPE)
212
ciphertext, err = proc.communicate(input = data)
213
if proc.returncode != 0:
217
def decrypt(self, data, password):
218
passphrase = self.password_encode(password)
219
with tempfile.NamedTemporaryFile(
220
dir = self.tempdir) as passfile:
221
passfile.write(passphrase)
223
proc = subprocess.Popen(['gpg', '--decrypt',
227
stdin = subprocess.PIPE,
228
stdout = subprocess.PIPE,
229
stderr = subprocess.PIPE)
230
decrypted_plaintext, err = proc.communicate(input = data)
231
if proc.returncode != 0:
233
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)
236
104
class AvahiError(Exception):
237
105
def __init__(self, value, *args, **kwargs):
238
106
self.value = value
239
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))
243
111
class AvahiServiceError(AvahiError):
247
114
class AvahiGroupError(AvahiError):
461
298
interval: datetime.timedelta(); How often to start a new checker
462
299
last_approval_request: datetime.datetime(); (UTC) or None
463
300
last_checked_ok: datetime.datetime(); (UTC) or None
464
last_checker_status: integer between 0 and 255 reflecting exit
465
status of last checker. -1 reflects crashed
466
checker, -2 means no checker completed yet.
467
last_checker_signal: The signal which killed the last checker, if
468
last_checker_status is -1
469
last_enabled: datetime.datetime(); (UTC) or None
301
last_enabled: datetime.datetime(); (UTC)
470
302
name: string; from the config file, used in log messages and
471
303
D-Bus identifiers
472
304
secret: bytestring; sent verbatim (over TLS) to client
473
305
timeout: datetime.timedelta(); How long from last_checked_ok
474
306
until this client is disabled
475
extended_timeout: extra long timeout when secret has been sent
307
extended_timeout: extra long timeout when password has been sent
476
308
runtime_expansions: Allowed attributes for runtime expansion.
477
309
expires: datetime.datetime(); time (UTC) when a client will be
478
310
disabled, or None
479
server_settings: The server_settings dict from main()
482
313
runtime_expansions = ("approval_delay", "approval_duration",
483
"created", "enabled", "expires",
484
"fingerprint", "host", "interval",
485
"last_approval_request", "last_checked_ok",
314
"created", "enabled", "fingerprint",
315
"host", "interval", "last_checked_ok",
486
316
"last_enabled", "name", "timeout")
489
"extended_timeout": "PT15M",
491
"checker": "fping -q -- %%(host)s",
493
"approval_delay": "PT0S",
494
"approval_duration": "PT1S",
495
"approved_by_default": "True",
500
def config_parser(config):
501
"""Construct a new dict of client settings of this form:
502
{ client_name: {setting_name: value, ...}, ...}
503
with exceptions for any special settings as defined above.
504
NOTE: Must be a pure function. Must return the same result
505
value given the same arguments.
508
for client_name in config.sections():
509
section = dict(config.items(client_name))
510
client = settings[client_name] = {}
512
client["host"] = section["host"]
513
# Reformat values from string types to Python types
514
client["approved_by_default"] = config.getboolean(
515
client_name, "approved_by_default")
516
client["enabled"] = config.getboolean(client_name,
519
# Uppercase and remove spaces from fingerprint for later
520
# comparison purposes with return value from the
521
# fingerprint() function
522
client["fingerprint"] = (section["fingerprint"].upper()
524
if "secret" in section:
525
client["secret"] = section["secret"].decode("base64")
526
elif "secfile" in section:
527
with open(os.path.expanduser(os.path.expandvars
528
(section["secfile"])),
530
client["secret"] = secfile.read()
532
raise TypeError("No secret or secfile for section {}"
534
client["timeout"] = string_to_delta(section["timeout"])
535
client["extended_timeout"] = string_to_delta(
536
section["extended_timeout"])
537
client["interval"] = string_to_delta(section["interval"])
538
client["approval_delay"] = string_to_delta(
539
section["approval_delay"])
540
client["approval_duration"] = string_to_delta(
541
section["approval_duration"])
542
client["checker_command"] = section["checker"]
543
client["last_approval_request"] = None
544
client["last_checked_ok"] = None
545
client["last_checker_status"] = -2
549
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'
551
if server_settings is None:
553
self.server_settings = server_settings
554
# adding all client settings
555
for setting, value in settings.items():
556
setattr(self, setting, value)
559
if not hasattr(self, "last_enabled"):
560
self.last_enabled = datetime.datetime.utcnow()
561
if not hasattr(self, "expires"):
562
self.expires = (datetime.datetime.utcnow()
565
self.last_enabled = None
568
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()
569
346
logger.debug(" Fingerprint: %s", self.fingerprint)
570
self.created = settings.get("created",
571
datetime.datetime.utcnow())
573
# 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
574
367
self.checker = None
575
368
self.checker_initiator_tag = None
576
369
self.disable_initiator_tag = None
577
371
self.checker_callback_tag = None
372
self.checker_command = config["checker"]
578
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",
580
378
self.approvals_pending = 0
581
self.changedstate = multiprocessing_manager.Condition(
582
multiprocessing_manager.Lock())
583
self.client_structure = [attr
584
for attr in self.__dict__.iterkeys()
585
if not attr.startswith("_")]
586
self.client_structure.append("client_structure")
588
for name, t in inspect.getmembers(
589
type(self), lambda obj: isinstance(obj, property)):
590
if not name.startswith("_"):
591
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())
593
# Send notice to process children that client state has changed
594
385
def send_changedstate(self):
595
with self.changedstate:
596
self.changedstate.notify_all()
386
self.changedstate.acquire()
387
self.changedstate.notify_all()
388
self.changedstate.release()
598
390
def enable(self):
599
391
"""Start this client's checker and timeout hooks"""
600
392
if getattr(self, "enabled", False):
601
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
603
402
self.expires = datetime.datetime.utcnow() + self.timeout
403
self.disable_initiator_tag = (gobject.timeout_add
404
(self.timeout_milliseconds(),
604
406
self.enabled = True
605
407
self.last_enabled = datetime.datetime.utcnow()
607
self.send_changedstate()
408
# Also start a new checker *right now*.
609
411
def disable(self, quiet=True):
610
412
"""Disable this client."""
611
413
if not getattr(self, "enabled", False):
416
self.send_changedstate()
614
418
logger.info("Disabling client %s", self.name)
615
if getattr(self, "disable_initiator_tag", None) is not None:
419
if getattr(self, "disable_initiator_tag", False):
616
420
gobject.source_remove(self.disable_initiator_tag)
617
421
self.disable_initiator_tag = None
618
422
self.expires = None
619
if getattr(self, "checker_initiator_tag", None) is not None:
423
if getattr(self, "checker_initiator_tag", False):
620
424
gobject.source_remove(self.checker_initiator_tag)
621
425
self.checker_initiator_tag = None
622
426
self.stop_checker()
427
if self.disable_hook:
428
self.disable_hook(self)
623
429
self.enabled = False
625
self.send_changedstate()
626
430
# Do not run this again if called by a gobject.timeout_add
629
433
def __del__(self):
434
self.disable_hook = None
632
def init_checker(self):
633
# Schedule a new checker to be started an 'interval' from now,
634
# and every interval from then on.
635
if self.checker_initiator_tag is not None:
636
gobject.source_remove(self.checker_initiator_tag)
637
self.checker_initiator_tag = gobject.timeout_add(
638
int(self.interval.total_seconds() * 1000),
640
# Schedule a disable() when 'timeout' has passed
641
if self.disable_initiator_tag is not None:
642
gobject.source_remove(self.disable_initiator_tag)
643
self.disable_initiator_tag = gobject.timeout_add(
644
int(self.timeout.total_seconds() * 1000), self.disable)
645
# Also start a new checker *right now*.
648
def checker_callback(self, source, condition,
649
(connection, command)):
437
def checker_callback(self, pid, condition, command):
650
438
"""The checker has completed, so take appropriate actions."""
651
439
self.checker_callback_tag = None
652
440
self.checker = None
653
# Read return code from connection (see call_pipe)
654
returncode = connection.recv()
658
self.last_checker_status = returncode
659
self.last_checker_signal = None
660
if self.last_checker_status == 0:
441
if os.WIFEXITED(condition):
442
exitstatus = os.WEXITSTATUS(condition)
661
444
logger.info("Checker for %(name)s succeeded",
663
446
self.checked_ok()
665
logger.info("Checker for %(name)s failed", vars(self))
448
logger.info("Checker for %(name)s failed",
667
self.last_checker_status = -1
668
self.last_checker_signal = -returncode
669
451
logger.warning("Checker for %(name)s crashed?",
673
def checked_ok(self):
674
"""Assert that the client has been seen, alive and well."""
675
self.last_checked_ok = datetime.datetime.utcnow()
676
self.last_checker_status = 0
677
self.last_checker_signal = None
680
def bump_timeout(self, timeout=None):
681
"""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,
682
460
if timeout is None:
683
461
timeout = self.timeout
684
if self.disable_initiator_tag is not None:
685
gobject.source_remove(self.disable_initiator_tag)
686
self.disable_initiator_tag = None
687
if getattr(self, "enabled", False):
688
self.disable_initiator_tag = gobject.timeout_add(
689
int(timeout.total_seconds() * 1000), self.disable)
690
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),
692
469
def need_approval(self):
693
470
self.last_approval_request = datetime.datetime.utcnow()
698
475
If a checker already exists, leave it running and do
700
477
# The reason for not killing a running checker is that if we
701
# did that, and if a checker (for some reason) started running
702
# slowly and taking more than 'interval' time, then the client
703
# would inevitably timeout, since no checker would get a
704
# 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
705
482
# checkers alone, the checker would have to take more time
706
483
# than 'timeout' for the client to be disabled, which is as it
709
if self.checker is not None and not self.checker.is_alive():
710
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)
713
499
# Start a new checker if needed
714
500
if self.checker is None:
715
# Escape attributes for the shell
717
attr: re.escape(str(getattr(self, attr)))
718
for attr in self.runtime_expansions }
720
command = self.checker_command % escaped_attrs
721
except TypeError as error:
722
logger.error('Could not format string "%s"',
723
self.checker_command,
725
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
726
520
self.current_checker_command = command
727
logger.info("Starting checker %r for %s", command,
729
# We don't need to redirect stdout and stderr, since
730
# in normal mode, that is already done by daemon(),
731
# and in debug mode we don't want to. (Stdin is
732
# always replaced by /dev/null.)
733
# The exception is when not debugging but nevertheless
734
# running in the foreground; use the previously
736
popen_args = { "close_fds": True,
739
if (not self.server_settings["debug"]
740
and self.server_settings["foreground"]):
741
popen_args.update({"stdout": wnull,
743
pipe = multiprocessing.Pipe(duplex=False)
744
self.checker = multiprocessing.Process(
746
args = (subprocess.call, pipe[1], command),
749
self.checker_callback_tag = gobject.io_add_watch(
750
pipe[0].fileno(), gobject.IO_IN,
751
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",
752
544
# Re-run this periodically if run by gobject.timeout_add
953
696
if not hasattr(value, "variant_level"):
954
properties[name] = value
956
properties[name] = type(value)(
957
value, variant_level = value.variant_level + 1)
958
return dbus.Dictionary(properties, signature="sv")
960
@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
961
def PropertiesChanged(self, interface_name, changed_properties,
962
invalidated_properties):
963
"""Standard D-Bus PropertiesChanged() signal, see D-Bus
699
all[name] = type(value)(value, variant_level=
700
value.variant_level+1)
701
return dbus.Dictionary(all, signature="sv")
968
703
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
969
704
out_signature="s",
970
705
path_keyword='object_path',
971
706
connection_keyword='connection')
972
707
def Introspect(self, object_path, connection):
973
"""Overloading of standard D-Bus method.
975
Inserts property tags and interface annotation tags.
708
"""Standard D-Bus method, overloaded to insert property tags.
977
710
xmlstring = dbus.service.Object.Introspect(self, object_path,
980
713
document = xml.dom.minidom.parseString(xmlstring)
982
714
def make_tag(document, name, prop):
983
715
e = document.createElement("property")
984
716
e.setAttribute("name", name)
985
717
e.setAttribute("type", prop._dbus_signature)
986
718
e.setAttribute("access", prop._dbus_access)
989
720
for if_tag in document.getElementsByTagName("interface"):
991
721
for tag in (make_tag(document, name, prop)
993
in self._get_all_dbus_things("property")
723
in self._get_all_dbus_properties()
994
724
if prop._dbus_interface
995
725
== if_tag.getAttribute("name")):
996
726
if_tag.appendChild(tag)
997
# Add annotation tags
998
for typ in ("method", "signal", "property"):
999
for tag in if_tag.getElementsByTagName(typ):
1001
for name, prop in (self.
1002
_get_all_dbus_things(typ)):
1003
if (name == tag.getAttribute("name")
1004
and prop._dbus_interface
1005
== if_tag.getAttribute("name")):
1006
annots.update(getattr(
1007
prop, "_dbus_annotations", {}))
1008
for name, value in annots.items():
1009
ann_tag = document.createElement(
1011
ann_tag.setAttribute("name", name)
1012
ann_tag.setAttribute("value", value)
1013
tag.appendChild(ann_tag)
1014
# Add interface annotation tags
1015
for annotation, value in dict(
1016
itertools.chain.from_iterable(
1017
annotations().items()
1018
for name, annotations
1019
in self._get_all_dbus_things("interface")
1020
if name == if_tag.getAttribute("name")
1022
ann_tag = document.createElement("annotation")
1023
ann_tag.setAttribute("name", annotation)
1024
ann_tag.setAttribute("value", value)
1025
if_tag.appendChild(ann_tag)
1026
727
# Add the names to the return values for the
1027
728
# "org.freedesktop.DBus.Properties" methods
1028
729
if (if_tag.getAttribute("name")
1043
744
except (AttributeError, xml.dom.DOMException,
1044
745
xml.parsers.expat.ExpatError) as error:
1045
746
logger.error("Failed to override Introspection method",
1047
748
return xmlstring
1050
def datetime_to_dbus(dt, variant_level=0):
751
def datetime_to_dbus (dt, variant_level=0):
1051
752
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1053
754
return dbus.String("", variant_level = variant_level)
1054
return dbus.String(dt.isoformat(), variant_level=variant_level)
1057
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1058
"""A class decorator; applied to a subclass of
1059
dbus.service.Object, it will add alternate D-Bus attributes with
1060
interface names according to the "alt_interface_names" mapping.
1063
@alternate_dbus_interfaces({"org.example.Interface":
1064
"net.example.AlternateInterface"})
1065
class SampleDBusObject(dbus.service.Object):
1066
@dbus.service.method("org.example.Interface")
1067
def SampleDBusMethod():
1070
The above "SampleDBusMethod" on "SampleDBusObject" will be
1071
reachable via two interfaces: "org.example.Interface" and
1072
"net.example.AlternateInterface", the latter of which will have
1073
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1074
"true", unless "deprecate" is passed with a False value.
1076
This works for methods and signals, and also for D-Bus properties
1077
(from DBusObjectWithProperties) and interfaces (from the
1078
dbus_interface_annotations decorator).
1082
for orig_interface_name, alt_interface_name in (
1083
alt_interface_names.items()):
1085
interface_names = set()
1086
# Go though all attributes of the class
1087
for attrname, attribute in inspect.getmembers(cls):
1088
# Ignore non-D-Bus attributes, and D-Bus attributes
1089
# with the wrong interface name
1090
if (not hasattr(attribute, "_dbus_interface")
1091
or not attribute._dbus_interface.startswith(
1092
orig_interface_name)):
1094
# Create an alternate D-Bus interface name based on
1096
alt_interface = attribute._dbus_interface.replace(
1097
orig_interface_name, alt_interface_name)
1098
interface_names.add(alt_interface)
1099
# Is this a D-Bus signal?
1100
if getattr(attribute, "_dbus_is_signal", False):
1101
# Extract the original non-method undecorated
1102
# function by black magic
1103
nonmethod_func = (dict(
1104
zip(attribute.func_code.co_freevars,
1105
attribute.__closure__))
1106
["func"].cell_contents)
1107
# Create a new, but exactly alike, function
1108
# object, and decorate it to be a new D-Bus signal
1109
# with the alternate D-Bus interface name
1110
new_function = (dbus.service.signal(
1111
alt_interface, attribute._dbus_signature)
1112
(types.FunctionType(
1113
nonmethod_func.func_code,
1114
nonmethod_func.func_globals,
1115
nonmethod_func.func_name,
1116
nonmethod_func.func_defaults,
1117
nonmethod_func.func_closure)))
1118
# Copy annotations, if any
1120
new_function._dbus_annotations = dict(
1121
attribute._dbus_annotations)
1122
except AttributeError:
1124
# Define a creator of a function to call both the
1125
# original and alternate functions, so both the
1126
# original and alternate signals gets sent when
1127
# the function is called
1128
def fixscope(func1, func2):
1129
"""This function is a scope container to pass
1130
func1 and func2 to the "call_both" function
1131
outside of its arguments"""
1133
def call_both(*args, **kwargs):
1134
"""This function will emit two D-Bus
1135
signals by calling func1 and func2"""
1136
func1(*args, **kwargs)
1137
func2(*args, **kwargs)
1140
# Create the "call_both" function and add it to
1142
attr[attrname] = fixscope(attribute, new_function)
1143
# Is this a D-Bus method?
1144
elif getattr(attribute, "_dbus_is_method", False):
1145
# Create a new, but exactly alike, function
1146
# object. Decorate it to be a new D-Bus method
1147
# with the alternate D-Bus interface name. Add it
1150
dbus.service.method(
1152
attribute._dbus_in_signature,
1153
attribute._dbus_out_signature)
1154
(types.FunctionType(attribute.func_code,
1155
attribute.func_globals,
1156
attribute.func_name,
1157
attribute.func_defaults,
1158
attribute.func_closure)))
1159
# Copy annotations, if any
1161
attr[attrname]._dbus_annotations = dict(
1162
attribute._dbus_annotations)
1163
except AttributeError:
1165
# Is this a D-Bus property?
1166
elif getattr(attribute, "_dbus_is_property", False):
1167
# Create a new, but exactly alike, function
1168
# object, and decorate it to be a new D-Bus
1169
# property with the alternate D-Bus interface
1170
# name. Add it to the class.
1171
attr[attrname] = (dbus_service_property(
1172
alt_interface, attribute._dbus_signature,
1173
attribute._dbus_access,
1174
attribute._dbus_get_args_options
1176
(types.FunctionType(
1177
attribute.func_code,
1178
attribute.func_globals,
1179
attribute.func_name,
1180
attribute.func_defaults,
1181
attribute.func_closure)))
1182
# Copy annotations, if any
1184
attr[attrname]._dbus_annotations = dict(
1185
attribute._dbus_annotations)
1186
except AttributeError:
1188
# Is this a D-Bus interface?
1189
elif getattr(attribute, "_dbus_is_interface", False):
1190
# Create a new, but exactly alike, function
1191
# object. Decorate it to be a new D-Bus interface
1192
# with the alternate D-Bus interface name. Add it
1195
dbus_interface_annotations(alt_interface)
1196
(types.FunctionType(attribute.func_code,
1197
attribute.func_globals,
1198
attribute.func_name,
1199
attribute.func_defaults,
1200
attribute.func_closure)))
1202
# Deprecate all alternate interfaces
1203
iname="_AlternateDBusNames_interface_annotation{}"
1204
for interface_name in interface_names:
1206
@dbus_interface_annotations(interface_name)
1208
return { "org.freedesktop.DBus.Deprecated":
1210
# Find an unused name
1211
for aname in (iname.format(i)
1212
for i in itertools.count()):
1213
if aname not in attr:
1217
# Replace the class with a new subclass of it with
1218
# methods, signals, etc. as created above.
1219
cls = type(b"{}Alternate".format(cls.__name__),
1226
@alternate_dbus_interfaces({"se.recompile.Mandos":
1227
"se.bsnet.fukt.Mandos"})
755
return dbus.String(dt.isoformat(),
756
variant_level=variant_level)
758
class transitional_dbus_metaclass(DBusObjectWithProperties.__metaclass__):
759
def __new__(mcs, name, bases, attr):
760
for attrname, old_dbusobj in inspect.getmembers(bases[0]):
761
new_interface = getattr(old_dbusobj, "_dbus_interface", "").replace("se.bsnet.fukt.", "se.recompile.")
762
if (getattr(old_dbusobj, "_dbus_is_signal", False)
763
and old_dbusobj._dbus_interface.startswith("se.bsnet.fukt.Mandos")):
764
unwrappedfunc = dict(zip(old_dbusobj.func_code.co_freevars,
765
old_dbusobj.__closure__))["func"].cell_contents
766
newfunc = types.FunctionType(unwrappedfunc.func_code,
767
unwrappedfunc.func_globals,
768
unwrappedfunc.func_name,
769
unwrappedfunc.func_defaults,
770
unwrappedfunc.func_closure)
771
new_dbusfunc = dbus.service.signal(
772
new_interface, old_dbusobj._dbus_signature)(newfunc)
773
attr["_transitional_" + attrname] = new_dbusfunc
775
def fixscope(func1, func2):
776
def newcall(*args, **kwargs):
777
func1(*args, **kwargs)
778
func2(*args, **kwargs)
781
attr[attrname] = fixscope(old_dbusobj, new_dbusfunc)
783
elif (getattr(old_dbusobj, "_dbus_is_method", False)
784
and old_dbusobj._dbus_interface.startswith("se.bsnet.fukt.Mandos")):
785
new_dbusfunc = (dbus.service.method
787
old_dbusobj._dbus_in_signature,
788
old_dbusobj._dbus_out_signature)
790
(old_dbusobj.func_code,
791
old_dbusobj.func_globals,
792
old_dbusobj.func_name,
793
old_dbusobj.func_defaults,
794
old_dbusobj.func_closure)))
796
attr[attrname] = new_dbusfunc
797
elif (getattr(old_dbusobj, "_dbus_is_property", False)
798
and old_dbusobj._dbus_interface.startswith("se.bsnet.fukt.Mandos")):
799
new_dbusfunc = (dbus_service_property
801
old_dbusobj._dbus_signature,
802
old_dbusobj._dbus_access,
803
old_dbusobj._dbus_get_args_options["byte_arrays"])
805
(old_dbusobj.func_code,
806
old_dbusobj.func_globals,
807
old_dbusobj.func_name,
808
old_dbusobj.func_defaults,
809
old_dbusobj.func_closure)))
811
attr[attrname] = new_dbusfunc
812
return type.__new__(mcs, name, bases, attr)
1228
814
class ClientDBus(Client, DBusObjectWithProperties):
1229
815
"""A Client class using D-Bus
1236
822
runtime_expansions = (Client.runtime_expansions
1237
+ ("dbus_object_path", ))
1239
_interface = "se.recompile.Mandos.Client"
823
+ ("dbus_object_path",))
1241
825
# dbus.service.Object doesn't use super(), so we can't either.
1243
827
def __init__(self, bus = None, *args, **kwargs):
828
self._approvals_pending = 0
1245
830
Client.__init__(self, *args, **kwargs)
1246
831
# Only now, when this client is initialized, can it show up on
1248
client_object_name = str(self.name).translate(
833
client_object_name = unicode(self.name).translate(
1249
834
{ord("."): ord("_"),
1250
835
ord("-"): ord("_")})
1251
self.dbus_object_path = dbus.ObjectPath(
1252
"/clients/" + client_object_name)
836
self.dbus_object_path = (dbus.ObjectPath
837
("/clients/" + client_object_name))
1253
838
DBusObjectWithProperties.__init__(self, self.bus,
1254
839
self.dbus_object_path)
1256
def notifychangeproperty(transform_func, dbus_name,
1257
type_func=lambda x: x,
1259
invalidate_only=False,
1260
_interface=_interface):
1261
""" Modify a variable so that it's a property which announces
1262
its changes to DBus.
1264
transform_fun: Function that takes a value and a variant_level
1265
and transforms it to a D-Bus type.
1266
dbus_name: D-Bus name of the variable
841
def notifychangeproperty(transform_func,
842
dbus_name, type_func=lambda x: x,
844
""" Modify a variable so that its a property that announce its
846
transform_fun: Function that takes a value and transform it to
848
dbus_name: DBus name of the variable
1267
849
type_func: Function that transform the value before sending it
1268
to the D-Bus. Default: no transform
1269
variant_level: D-Bus variant level. Default: 1
851
variant_level: DBus variant level. default: 1
1271
attrname = "_{}".format(dbus_name)
1273
854
def setter(self, value):
855
old_value = real_value[0]
856
real_value[0] = value
1274
857
if hasattr(self, "dbus_object_path"):
1275
if (not hasattr(self, attrname) or
1276
type_func(getattr(self, attrname, None))
1277
!= type_func(value)):
1279
self.PropertiesChanged(
1280
_interface, dbus.Dictionary(),
1281
dbus.Array((dbus_name, )))
1283
dbus_value = transform_func(
1285
variant_level = variant_level)
1286
self.PropertyChanged(dbus.String(dbus_name),
1288
self.PropertiesChanged(
1290
dbus.Dictionary({ dbus.String(dbus_name):
1293
setattr(self, attrname, value)
858
if type_func(old_value) != type_func(real_value[0]):
859
dbus_value = transform_func(type_func(real_value[0]),
861
self.PropertyChanged(dbus.String(dbus_name),
1295
return property(lambda self: getattr(self, attrname), setter)
864
return property(lambda self: real_value[0], setter)
1297
867
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1298
868
approvals_pending = notifychangeproperty(dbus.Boolean,
1301
871
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1302
872
last_enabled = notifychangeproperty(datetime_to_dbus,
1304
checker = notifychangeproperty(
1305
dbus.Boolean, "CheckerRunning",
1306
type_func = lambda checker: checker is not None)
874
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
875
type_func = lambda checker: checker is not None)
1307
876
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1308
877
"LastCheckedOK")
1309
last_checker_status = notifychangeproperty(dbus.Int16,
1310
"LastCheckerStatus")
1311
last_approval_request = notifychangeproperty(
1312
datetime_to_dbus, "LastApprovalRequest")
878
last_approval_request = notifychangeproperty(datetime_to_dbus,
879
"LastApprovalRequest")
1313
880
approved_by_default = notifychangeproperty(dbus.Boolean,
1314
881
"ApprovedByDefault")
1315
approval_delay = notifychangeproperty(
1316
dbus.UInt64, "ApprovalDelay",
1317
type_func = lambda td: td.total_seconds() * 1000)
1318
approval_duration = notifychangeproperty(
1319
dbus.UInt64, "ApprovalDuration",
1320
type_func = lambda td: td.total_seconds() * 1000)
882
approval_delay = notifychangeproperty(dbus.UInt16, "ApprovalDelay",
883
type_func = _timedelta_to_milliseconds)
884
approval_duration = notifychangeproperty(dbus.UInt16, "ApprovalDuration",
885
type_func = _timedelta_to_milliseconds)
1321
886
host = notifychangeproperty(dbus.String, "Host")
1322
timeout = notifychangeproperty(
1323
dbus.UInt64, "Timeout",
1324
type_func = lambda td: td.total_seconds() * 1000)
1325
extended_timeout = notifychangeproperty(
1326
dbus.UInt64, "ExtendedTimeout",
1327
type_func = lambda td: td.total_seconds() * 1000)
1328
interval = notifychangeproperty(
1329
dbus.UInt64, "Interval",
1330
type_func = lambda td: td.total_seconds() * 1000)
887
timeout = notifychangeproperty(dbus.UInt16, "Timeout",
888
type_func = _timedelta_to_milliseconds)
889
extended_timeout = notifychangeproperty(dbus.UInt16, "ExtendedTimeout",
890
type_func = _timedelta_to_milliseconds)
891
interval = notifychangeproperty(dbus.UInt16, "Interval",
892
type_func = _timedelta_to_milliseconds)
1331
893
checker_command = notifychangeproperty(dbus.String, "Checker")
1332
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1333
invalidate_only=True)
1335
895
del notifychangeproperty
1566
1118
return datetime_to_dbus(self.last_approval_request)
1568
1120
# Timeout - property
1569
@dbus_service_property(_interface,
1121
@dbus_service_property(_interface, signature="t",
1571
1122
access="readwrite")
1572
1123
def Timeout_dbus_property(self, value=None):
1573
1124
if value is None: # get
1574
return dbus.UInt64(self.timeout.total_seconds() * 1000)
1575
old_timeout = self.timeout
1125
return dbus.UInt64(self.timeout_milliseconds())
1576
1126
self.timeout = datetime.timedelta(0, 0, 0, value)
1577
# Reschedule disabling
1579
now = datetime.datetime.utcnow()
1580
self.expires += self.timeout - old_timeout
1581
if self.expires <= now:
1582
# The timeout has passed
1585
if (getattr(self, "disable_initiator_tag", None)
1588
gobject.source_remove(self.disable_initiator_tag)
1589
self.disable_initiator_tag = gobject.timeout_add(
1590
int((self.expires - now).total_seconds() * 1000),
1127
if getattr(self, "disable_initiator_tag", None) is None:
1129
# Reschedule timeout
1130
gobject.source_remove(self.disable_initiator_tag)
1131
self.disable_initiator_tag = None
1133
time_to_die = (self.
1134
_timedelta_to_milliseconds((self
1139
if time_to_die <= 0:
1140
# The timeout has passed
1143
self.expires = (datetime.datetime.utcnow()
1144
+ datetime.timedelta(milliseconds = time_to_die))
1145
self.disable_initiator_tag = (gobject.timeout_add
1146
(time_to_die, self.disable))
1593
1148
# ExtendedTimeout - property
1594
@dbus_service_property(_interface,
1149
@dbus_service_property(_interface, signature="t",
1596
1150
access="readwrite")
1597
1151
def ExtendedTimeout_dbus_property(self, value=None):
1598
1152
if value is None: # get
1599
return dbus.UInt64(self.extended_timeout.total_seconds()
1153
return dbus.UInt64(self.extended_timeout_milliseconds())
1601
1154
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1603
1156
# Interval - property
1604
@dbus_service_property(_interface,
1157
@dbus_service_property(_interface, signature="t",
1606
1158
access="readwrite")
1607
1159
def Interval_dbus_property(self, value=None):
1608
1160
if value is None: # get
1609
return dbus.UInt64(self.interval.total_seconds() * 1000)
1161
return dbus.UInt64(self.interval_milliseconds())
1610
1162
self.interval = datetime.timedelta(0, 0, 0, value)
1611
1163
if getattr(self, "checker_initiator_tag", None) is None:
1614
# Reschedule checker run
1615
gobject.source_remove(self.checker_initiator_tag)
1616
self.checker_initiator_tag = gobject.timeout_add(
1617
value, self.start_checker)
1618
self.start_checker() # Start one now, too
1165
# Reschedule checker run
1166
gobject.source_remove(self.checker_initiator_tag)
1167
self.checker_initiator_tag = (gobject.timeout_add
1168
(value, self.start_checker))
1169
self.start_checker() # Start one now, too
1620
1171
# Checker - property
1621
@dbus_service_property(_interface,
1172
@dbus_service_property(_interface, signature="s",
1623
1173
access="readwrite")
1624
1174
def Checker_dbus_property(self, value=None):
1625
1175
if value is None: # get
1626
1176
return dbus.String(self.checker_command)
1627
self.checker_command = str(value)
1177
self.checker_command = value
1629
1179
# CheckerRunning - property
1630
@dbus_service_property(_interface,
1180
@dbus_service_property(_interface, signature="b",
1632
1181
access="readwrite")
1633
1182
def CheckerRunning_dbus_property(self, value=None):
1634
1183
if value is None: # get
1859
1408
def fingerprint(openpgp):
1860
1409
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1861
1410
# New GnuTLS "datum" with the OpenPGP public key
1862
datum = gnutls.library.types.gnutls_datum_t(
1863
ctypes.cast(ctypes.c_char_p(openpgp),
1864
ctypes.POINTER(ctypes.c_ubyte)),
1865
ctypes.c_uint(len(openpgp)))
1411
datum = (gnutls.library.types
1412
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1415
ctypes.c_uint(len(openpgp))))
1866
1416
# New empty GnuTLS certificate
1867
1417
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1868
gnutls.library.functions.gnutls_openpgp_crt_init(
1418
(gnutls.library.functions
1419
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1870
1420
# Import the OpenPGP public key into the certificate
1871
gnutls.library.functions.gnutls_openpgp_crt_import(
1872
crt, ctypes.byref(datum),
1873
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
1421
(gnutls.library.functions
1422
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1423
gnutls.library.constants
1424
.GNUTLS_OPENPGP_FMT_RAW))
1874
1425
# Verify the self signature in the key
1875
1426
crtverify = ctypes.c_uint()
1876
gnutls.library.functions.gnutls_openpgp_crt_verify_self(
1877
crt, 0, ctypes.byref(crtverify))
1427
(gnutls.library.functions
1428
.gnutls_openpgp_crt_verify_self(crt, 0,
1429
ctypes.byref(crtverify)))
1878
1430
if crtverify.value != 0:
1879
1431
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1880
raise gnutls.errors.CertificateSecurityError(
1432
raise (gnutls.errors.CertificateSecurityError
1882
1434
# New buffer for the fingerprint
1883
1435
buf = ctypes.create_string_buffer(20)
1884
1436
buf_len = ctypes.c_size_t()
1885
1437
# Get the fingerprint from the certificate into the buffer
1886
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint(
1887
crt, ctypes.byref(buf), ctypes.byref(buf_len))
1438
(gnutls.library.functions
1439
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1440
ctypes.byref(buf_len)))
1888
1441
# Deinit the certificate
1889
1442
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1890
1443
# Convert the buffer to a Python bytestring
1891
1444
fpr = ctypes.string_at(buf, buf_len.value)
1892
1445
# Convert the bytestring to hexadecimal notation
1893
hex_fpr = binascii.hexlify(fpr).upper()
1446
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
1897
1450
class MultiprocessingMixIn(object):
1898
1451
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1900
1452
def sub_process_main(self, request, address):
1902
1454
self.finish_request(request, address)
1904
1456
self.handle_error(request, address)
1905
1457
self.close_request(request)
1907
1459
def process_request(self, request, address):
1908
1460
"""Start a new process to process the request."""
1909
proc = multiprocessing.Process(target = self.sub_process_main,
1910
args = (request, address))
1461
multiprocessing.Process(target = self.sub_process_main,
1462
args = (request, address)).start()
1915
1465
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1916
1466
""" adds a pipe to the MixIn """
1918
1467
def process_request(self, request, client_address):
1919
1468
"""Overrides and wraps the original process_request().
2145
def rfc3339_duration_to_delta(duration):
2146
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2148
>>> rfc3339_duration_to_delta("P7D")
2149
datetime.timedelta(7)
2150
>>> rfc3339_duration_to_delta("PT60S")
2151
datetime.timedelta(0, 60)
2152
>>> rfc3339_duration_to_delta("PT60M")
2153
datetime.timedelta(0, 3600)
2154
>>> rfc3339_duration_to_delta("PT24H")
2155
datetime.timedelta(1)
2156
>>> rfc3339_duration_to_delta("P1W")
2157
datetime.timedelta(7)
2158
>>> rfc3339_duration_to_delta("PT5M30S")
2159
datetime.timedelta(0, 330)
2160
>>> rfc3339_duration_to_delta("P1DT3M20S")
2161
datetime.timedelta(1, 200)
2164
# Parsing an RFC 3339 duration with regular expressions is not
2165
# possible - there would have to be multiple places for the same
2166
# values, like seconds. The current code, while more esoteric, is
2167
# cleaner without depending on a parsing library. If Python had a
2168
# built-in library for parsing we would use it, but we'd like to
2169
# avoid excessive use of external libraries.
2171
# New type for defining tokens, syntax, and semantics all-in-one
2172
Token = collections.namedtuple("Token",
2173
("regexp", # To match token; if
2174
# "value" is not None,
2175
# must have a "group"
2177
"value", # datetime.timedelta or
2179
"followers")) # Tokens valid after
2181
Token = collections.namedtuple("Token", (
2182
"regexp", # To match token; if "value" is not None, must have
2183
# a "group" containing digits
2184
"value", # datetime.timedelta or None
2185
"followers")) # Tokens valid after this token
2186
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2187
# the "duration" ABNF definition in RFC 3339, Appendix A.
2188
token_end = Token(re.compile(r"$"), None, frozenset())
2189
token_second = Token(re.compile(r"(\d+)S"),
2190
datetime.timedelta(seconds=1),
2191
frozenset((token_end, )))
2192
token_minute = Token(re.compile(r"(\d+)M"),
2193
datetime.timedelta(minutes=1),
2194
frozenset((token_second, token_end)))
2195
token_hour = Token(re.compile(r"(\d+)H"),
2196
datetime.timedelta(hours=1),
2197
frozenset((token_minute, token_end)))
2198
token_time = Token(re.compile(r"T"),
2200
frozenset((token_hour, token_minute,
2202
token_day = Token(re.compile(r"(\d+)D"),
2203
datetime.timedelta(days=1),
2204
frozenset((token_time, token_end)))
2205
token_month = Token(re.compile(r"(\d+)M"),
2206
datetime.timedelta(weeks=4),
2207
frozenset((token_day, token_end)))
2208
token_year = Token(re.compile(r"(\d+)Y"),
2209
datetime.timedelta(weeks=52),
2210
frozenset((token_month, token_end)))
2211
token_week = Token(re.compile(r"(\d+)W"),
2212
datetime.timedelta(weeks=1),
2213
frozenset((token_end, )))
2214
token_duration = Token(re.compile(r"P"), None,
2215
frozenset((token_year, token_month,
2216
token_day, token_time,
2218
# Define starting values
2219
value = datetime.timedelta() # Value so far
2221
followers = frozenset((token_duration,)) # Following valid tokens
2222
s = duration # String left to parse
2223
# Loop until end token is found
2224
while found_token is not token_end:
2225
# Search for any currently valid tokens
2226
for token in followers:
2227
match = token.regexp.match(s)
2228
if match is not None:
2230
if token.value is not None:
2231
# Value found, parse digits
2232
factor = int(match.group(1), 10)
2233
# Add to value so far
2234
value += factor * token.value
2235
# Strip token from string
2236
s = token.regexp.sub("", s, 1)
2239
# Set valid next tokens
2240
followers = found_token.followers
2243
# No currently valid tokens were found
2244
raise ValueError("Invalid RFC 3339 duration")
2249
1653
def string_to_delta(interval):
2250
1654
"""Parse a string and return a datetime.timedelta
2380
1787
"debug": "False",
2382
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2383
":+SIGN-RSA-SHA224:+SIGN-RSA-RMD160",
1789
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2384
1790
"servicename": "Mandos",
2385
1791
"use_dbus": "True",
2386
1792
"use_ipv6": "True",
2387
1793
"debuglevel": "",
2390
"statedir": "/var/lib/mandos",
2391
"foreground": "False",
2395
1796
# Parse config file for server-global settings
2396
1797
server_config = configparser.SafeConfigParser(server_defaults)
2397
1798
del server_defaults
2398
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1799
server_config.read(os.path.join(options.configdir,
2399
1801
# Convert the SafeConfigParser object to a dict
2400
1802
server_settings = server_config.defaults()
2401
1803
# Use the appropriate methods on the non-string config options
2402
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
1804
for option in ("debug", "use_dbus", "use_ipv6"):
2403
1805
server_settings[option] = server_config.getboolean("DEFAULT",
2405
1807
if server_settings["port"]:
2406
1808
server_settings["port"] = server_config.getint("DEFAULT",
2408
if server_settings["socket"]:
2409
server_settings["socket"] = server_config.getint("DEFAULT",
2411
# Later, stdin will, and stdout and stderr might, be dup'ed
2412
# over with an opened os.devnull. But we don't want this to
2413
# happen with a supplied network socket.
2414
if 0 <= server_settings["socket"] <= 2:
2415
server_settings["socket"] = os.dup(server_settings
2417
1810
del server_config
2419
1812
# Override the settings from the config file with command line
2420
1813
# options, if set.
2421
1814
for option in ("interface", "address", "port", "debug",
2422
"priority", "servicename", "configdir", "use_dbus",
2423
"use_ipv6", "debuglevel", "restore", "statedir",
2424
"socket", "foreground", "zeroconf"):
1815
"priority", "servicename", "configdir",
1816
"use_dbus", "use_ipv6", "debuglevel"):
2425
1817
value = getattr(options, option)
2426
1818
if value is not None:
2427
1819
server_settings[option] = value
2429
1821
# Force all strings to be unicode
2430
1822
for option in server_settings.keys():
2431
if isinstance(server_settings[option], bytes):
2432
server_settings[option] = (server_settings[option]
2434
# Force all boolean options to be boolean
2435
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2436
"foreground", "zeroconf"):
2437
server_settings[option] = bool(server_settings[option])
2438
# Debug implies foreground
2439
if server_settings["debug"]:
2440
server_settings["foreground"] = True
1823
if type(server_settings[option]) is str:
1824
server_settings[option] = unicode(server_settings[option])
2441
1825
# Now we have our good server settings in "server_settings"
2443
1827
##################################################################
2445
if (not server_settings["zeroconf"]
2446
and not (server_settings["port"]
2447
or server_settings["socket"] != "")):
2448
parser.error("Needs port or socket to work without Zeroconf")
2450
1829
# For convenience
2451
1830
debug = server_settings["debug"]
2452
1831
debuglevel = server_settings["debuglevel"]
2453
1832
use_dbus = server_settings["use_dbus"]
2454
1833
use_ipv6 = server_settings["use_ipv6"]
2455
stored_state_path = os.path.join(server_settings["statedir"],
2457
foreground = server_settings["foreground"]
2458
zeroconf = server_settings["zeroconf"]
2461
initlogger(debug, logging.DEBUG)
2466
level = getattr(logging, debuglevel.upper())
2467
initlogger(debug, level)
2469
1835
if server_settings["servicename"] != "Mandos":
2470
syslogger.setFormatter(
2471
logging.Formatter('Mandos ({}) [%(process)d]:'
2472
' %(levelname)s: %(message)s'.format(
2473
server_settings["servicename"])))
1836
syslogger.setFormatter(logging.Formatter
1837
('Mandos (%s) [%%(process)d]:'
1838
' %%(levelname)s: %%(message)s'
1839
% server_settings["servicename"]))
2475
1841
# Parse config file with clients
2476
client_config = configparser.SafeConfigParser(Client
1842
client_defaults = { "timeout": "5m",
1843
"extended_timeout": "15m",
1845
"checker": "fping -q -- %%(host)s",
1847
"approval_delay": "0s",
1848
"approval_duration": "1s",
1850
client_config = configparser.SafeConfigParser(client_defaults)
2478
1851
client_config.read(os.path.join(server_settings["configdir"],
2479
1852
"clients.conf"))
2481
1854
global mandos_dbus_service
2482
1855
mandos_dbus_service = None
2485
if server_settings["socket"] != "":
2486
socketfd = server_settings["socket"]
2487
tcp_server = MandosServer(
2488
(server_settings["address"], server_settings["port"]),
2490
interface=(server_settings["interface"] or None),
2492
gnutls_priority=server_settings["priority"],
2496
pidfilename = "/run/mandos.pid"
2497
if not os.path.isdir("/run/."):
2498
pidfilename = "/var/run/mandos.pid"
1857
tcp_server = MandosServer((server_settings["address"],
1858
server_settings["port"]),
1860
interface=(server_settings["interface"]
1864
server_settings["priority"],
1867
pidfilename = "/var/run/mandos.pid"
2501
1869
pidfile = open(pidfilename, "w")
2502
except IOError as e:
2503
logger.error("Could not open file %r", pidfilename,
1871
logger.error("Could not open file %r", pidfilename)
2506
for name in ("_mandos", "mandos", "nobody"):
1874
uid = pwd.getpwnam("_mandos").pw_uid
1875
gid = pwd.getpwnam("_mandos").pw_gid
2508
uid = pwd.getpwnam(name).pw_uid
2509
gid = pwd.getpwnam(name).pw_gid
1878
uid = pwd.getpwnam("mandos").pw_uid
1879
gid = pwd.getpwnam("mandos").pw_gid
2511
1880
except KeyError:
1882
uid = pwd.getpwnam("nobody").pw_uid
1883
gid = pwd.getpwnam("nobody").pw_gid
2519
1890
except OSError as error:
2520
if error.errno != errno.EPERM:
1891
if error[0] != errno.EPERM:
1894
if not debug and not debuglevel:
1895
syslogger.setLevel(logging.WARNING)
1896
console.setLevel(logging.WARNING)
1898
level = getattr(logging, debuglevel.upper())
1899
syslogger.setLevel(level)
1900
console.setLevel(level)
2524
1903
# Enable all possible GnuTLS debugging
2531
1910
def debug_gnutls(level, string):
2532
1911
logger.debug("GnuTLS: %s", string[:-1])
2534
gnutls.library.functions.gnutls_global_set_log_function(
1913
(gnutls.library.functions
1914
.gnutls_global_set_log_function(debug_gnutls))
2537
1916
# Redirect stdin so all checkers get /dev/null
2538
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1917
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2539
1918
os.dup2(null, sys.stdin.fileno())
1922
# No console logging
1923
logger.removeHandler(console)
2543
1925
# Need to fork before connecting to D-Bus
2545
1927
# Close all input and output, do double fork, etc.
2548
# multiprocessing will use threads, so before we use gobject we
2549
# need to inform gobject that threads will be used.
2550
gobject.threads_init()
2552
1930
global main_loop
2553
1931
# From the Avahi example code
2554
DBusGMainLoop(set_as_default=True)
1932
DBusGMainLoop(set_as_default=True )
2555
1933
main_loop = gobject.MainLoop()
2556
1934
bus = dbus.SystemBus()
2557
1935
# End of Avahi example code
2560
bus_name = dbus.service.BusName("se.recompile.Mandos",
2563
old_bus_name = dbus.service.BusName(
2564
"se.bsnet.fukt.Mandos", bus,
1938
bus_name = dbus.service.BusName("se.bsnet.fukt.Mandos",
1939
bus, do_not_queue=True)
1940
bus_name2 = dbus.service.BusName("se.recompile.Mandos",
1941
bus, do_not_queue=True)
2566
1942
except dbus.exceptions.NameExistsException as e:
2567
logger.error("Disabling D-Bus:", exc_info=e)
1943
logger.error(unicode(e) + ", disabling D-Bus")
2568
1944
use_dbus = False
2569
1945
server_settings["use_dbus"] = False
2570
1946
tcp_server.use_dbus = False
2572
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2573
service = AvahiServiceToSyslog(
2574
name = server_settings["servicename"],
2575
servicetype = "_mandos._tcp",
2576
protocol = protocol,
2578
if server_settings["interface"]:
2579
service.interface = if_nametoindex(
2580
server_settings["interface"].encode("utf-8"))
1947
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1948
service = AvahiService(name = server_settings["servicename"],
1949
servicetype = "_mandos._tcp",
1950
protocol = protocol, bus = bus)
1951
if server_settings["interface"]:
1952
service.interface = (if_nametoindex
1953
(str(server_settings["interface"])))
2582
1955
global multiprocessing_manager
2583
1956
multiprocessing_manager = multiprocessing.Manager()
2585
1958
client_class = Client
2587
client_class = functools.partial(ClientDBus, bus = bus)
2589
client_settings = Client.config_parser(client_config)
2590
old_client_settings = {}
2593
# This is used to redirect stdout and stderr for checker processes
2595
wnull = open(os.devnull, "w") # A writable /dev/null
2596
# Only used if server is running in foreground but not in debug
2598
if debug or not foreground:
2601
# Get client data and settings from last running state.
2602
if server_settings["restore"]:
2604
with open(stored_state_path, "rb") as stored_state:
2605
clients_data, old_client_settings = pickle.load(
2607
os.remove(stored_state_path)
2608
except IOError as e:
2609
if e.errno == errno.ENOENT:
2610
logger.warning("Could not load persistent state:"
2611
" {}".format(os.strerror(e.errno)))
2613
logger.critical("Could not load persistent state:",
2616
except EOFError as e:
2617
logger.warning("Could not load persistent state: "
2621
with PGPEngine() as pgp:
2622
for client_name, client in clients_data.items():
2623
# Skip removed clients
2624
if client_name not in client_settings:
2627
# Decide which value to use after restoring saved state.
2628
# We have three different values: Old config file,
2629
# new config file, and saved state.
2630
# New config value takes precedence if it differs from old
2631
# config value, otherwise use saved state.
2632
for name, value in client_settings[client_name].items():
2634
# For each value in new config, check if it
2635
# differs from the old config value (Except for
2636
# the "secret" attribute)
2637
if (name != "secret"
2639
old_client_settings[client_name][name])):
2640
client[name] = value
2644
# Clients who has passed its expire date can still be
2645
# enabled if its last checker was successful. A Client
2646
# whose checker succeeded before we stored its state is
2647
# assumed to have successfully run all checkers during
2649
if client["enabled"]:
2650
if datetime.datetime.utcnow() >= client["expires"]:
2651
if not client["last_checked_ok"]:
2653
"disabling client {} - Client never "
2654
"performed a successful checker".format(
2656
client["enabled"] = False
2657
elif client["last_checker_status"] != 0:
2659
"disabling client {} - Client last"
2660
" checker failed with error code"
2663
client["last_checker_status"]))
2664
client["enabled"] = False
2666
client["expires"] = (
2667
datetime.datetime.utcnow()
2668
+ client["timeout"])
2669
logger.debug("Last checker succeeded,"
2670
" keeping {} enabled".format(
1960
client_class = functools.partial(ClientDBusTransitional, bus = bus)
1961
def client_config_items(config, section):
1962
special_settings = {
1963
"approved_by_default":
1964
lambda: config.getboolean(section,
1965
"approved_by_default"),
1967
for name, value in config.items(section):
2673
client["secret"] = pgp.decrypt(
2674
client["encrypted_secret"],
2675
client_settings[client_name]["secret"])
2677
# If decryption fails, we use secret from new settings
2678
logger.debug("Failed to decrypt {} old secret".format(
2680
client["secret"] = (client_settings[client_name]
2683
# Add/remove clients based on new changes made to config
2684
for client_name in (set(old_client_settings)
2685
- set(client_settings)):
2686
del clients_data[client_name]
2687
for client_name in (set(client_settings)
2688
- set(old_client_settings)):
2689
clients_data[client_name] = client_settings[client_name]
2691
# Create all client objects
2692
for client_name, client in clients_data.items():
2693
tcp_server.clients[client_name] = client_class(
2696
server_settings = server_settings)
1969
yield (name, special_settings[name]())
1973
tcp_server.clients.update(set(
1974
client_class(name = section,
1975
config= dict(client_config_items(
1976
client_config, section)))
1977
for section in client_config.sections()))
2698
1978
if not tcp_server.clients:
2699
1979
logger.warning("No clients defined")
2702
if pidfile is not None:
2706
pidfile.write("{}\n".format(pid).encode("utf-8"))
2708
logger.error("Could not write to file %r with PID %d",
1985
pidfile.write(str(pid) + "\n".encode("utf-8"))
1988
logger.error("Could not write to file %r with PID %d",
1991
# "pidfile" was never created
2711
1993
del pidfilename
1995
signal.signal(signal.SIGINT, signal.SIG_IGN)
2713
1997
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2714
1998
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2718
@alternate_dbus_interfaces(
2719
{ "se.recompile.Mandos": "se.bsnet.fukt.Mandos" })
2720
class MandosDBusService(DBusObjectWithProperties):
2001
class MandosDBusService(dbus.service.Object):
2721
2002
"""A D-Bus proxy object"""
2723
2003
def __init__(self):
2724
2004
dbus.service.Object.__init__(self, bus, "/")
2726
_interface = "se.recompile.Mandos"
2728
@dbus_interface_annotations(_interface)
2731
"org.freedesktop.DBus.Property.EmitsChangedSignal":
2005
_interface = "se.bsnet.fukt.Mandos"
2734
2007
@dbus.service.signal(_interface, signature="o")
2735
2008
def ClientAdded(self, objpath):
2780
mandos_dbus_service = MandosDBusService()
2053
class MandosDBusServiceTransitional(MandosDBusService):
2054
__metaclass__ = transitional_dbus_metaclass
2055
mandos_dbus_service = MandosDBusServiceTransitional()
2783
2058
"Cleanup function; run on exit"
2787
multiprocessing.active_children()
2789
if not (tcp_server.clients or client_settings):
2792
# Store client before exiting. Secrets are encrypted with key
2793
# based on what config file has. If config file is
2794
# removed/edited, old secret will thus be unrecovable.
2796
with PGPEngine() as pgp:
2797
for client in tcp_server.clients.itervalues():
2798
key = client_settings[client.name]["secret"]
2799
client.encrypted_secret = pgp.encrypt(client.secret,
2803
# A list of attributes that can not be pickled
2805
exclude = { "bus", "changedstate", "secret",
2806
"checker", "server_settings" }
2807
for name, typ in inspect.getmembers(dbus.service
2811
client_dict["encrypted_secret"] = (client
2813
for attr in client.client_structure:
2814
if attr not in exclude:
2815
client_dict[attr] = getattr(client, attr)
2817
clients[client.name] = client_dict
2818
del client_settings[client.name]["secret"]
2821
with tempfile.NamedTemporaryFile(
2825
dir=os.path.dirname(stored_state_path),
2826
delete=False) as stored_state:
2827
pickle.dump((clients, client_settings), stored_state)
2828
tempname = stored_state.name
2829
os.rename(tempname, stored_state_path)
2830
except (IOError, OSError) as e:
2836
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
2837
logger.warning("Could not save persistent state: {}"
2838
.format(os.strerror(e.errno)))
2840
logger.warning("Could not save persistent state:",
2844
# Delete all clients, and settings from config
2845
2061
while tcp_server.clients:
2846
name, client = tcp_server.clients.popitem()
2062
client = tcp_server.clients.pop()
2848
2064
client.remove_from_connection()
2065
client.disable_hook = None
2849
2066
# Don't signal anything except ClientRemoved
2850
2067
client.disable(quiet=True)
2852
2069
# Emit D-Bus signal
2853
mandos_dbus_service.ClientRemoved(
2854
client.dbus_object_path, client.name)
2855
client_settings.clear()
2070
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
2857
2073
atexit.register(cleanup)
2859
for client in tcp_server.clients.itervalues():
2075
for client in tcp_server.clients:
2861
2077
# Emit D-Bus signal
2862
2078
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2863
# Need to initiate checking of clients
2865
client.init_checker()
2867
2081
tcp_server.enable()
2868
2082
tcp_server.server_activate()
2870
2084
# Find out what port we got
2872
service.port = tcp_server.socket.getsockname()[1]
2085
service.port = tcp_server.socket.getsockname()[1]
2874
2087
logger.info("Now listening on address %r, port %d,"
2875
" flowinfo %d, scope_id %d",
2876
*tcp_server.socket.getsockname())
2088
" flowinfo %d, scope_id %d"
2089
% tcp_server.socket.getsockname())
2878
logger.info("Now listening on address %r, port %d",
2879
*tcp_server.socket.getsockname())
2091
logger.info("Now listening on address %r, port %d"
2092
% tcp_server.socket.getsockname())
2881
2094
#service.interface = tcp_server.socket.getsockname()[3]
2885
# From the Avahi example code
2888
except dbus.exceptions.DBusException as error:
2889
logger.critical("D-Bus Exception", exc_info=error)
2892
# End of Avahi example code
2097
# From the Avahi example code
2100
except dbus.exceptions.DBusException as error:
2101
logger.critical("DBusException: %s", error)
2104
# End of Avahi example code
2894
2106
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2895
2107
lambda *args, **kwargs: