82
88
except ImportError:
83
89
SO_BINDTODEVICE = None
88
#logger = logging.getLogger('mandos')
89
logger = logging.Logger('mandos')
90
syslogger = (logging.handlers.SysLogHandler
91
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
92
address = str("/dev/log")))
93
syslogger.setFormatter(logging.Formatter
94
('Mandos [%(process)d]: %(levelname)s:'
96
logger.addHandler(syslogger)
98
console = logging.StreamHandler()
99
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
102
logger.addHandler(console)
92
stored_state_file = "clients.pickle"
94
logger = logging.getLogger()
98
if_nametoindex = (ctypes.cdll.LoadLibrary
99
(ctypes.util.find_library("c"))
101
except (OSError, AttributeError):
102
def if_nametoindex(interface):
103
"Get an interface index the hard way, i.e. using fcntl()"
104
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
105
with contextlib.closing(socket.socket()) as s:
106
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
107
struct.pack(str("16s16x"),
109
interface_index = struct.unpack(str("I"),
111
return interface_index
114
def initlogger(debug, level=logging.WARNING):
115
"""init logger and add loglevel"""
118
syslogger = (logging.handlers.SysLogHandler
120
logging.handlers.SysLogHandler.LOG_DAEMON,
121
address = str("/dev/log")))
122
syslogger.setFormatter(logging.Formatter
123
('Mandos [%(process)d]: %(levelname)s:'
125
logger.addHandler(syslogger)
128
console = logging.StreamHandler()
129
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
133
logger.addHandler(console)
134
logger.setLevel(level)
137
class PGPError(Exception):
138
"""Exception if encryption/decryption fails"""
142
class PGPEngine(object):
143
"""A simple class for OpenPGP symmetric encryption & decryption"""
145
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
146
self.gnupgargs = ['--batch',
147
'--home', self.tempdir,
155
def __exit__(self, exc_type, exc_value, traceback):
163
if self.tempdir is not None:
164
# Delete contents of tempdir
165
for root, dirs, files in os.walk(self.tempdir,
167
for filename in files:
168
os.remove(os.path.join(root, filename))
170
os.rmdir(os.path.join(root, dirname))
172
os.rmdir(self.tempdir)
175
def password_encode(self, password):
176
# Passphrase can not be empty and can not contain newlines or
177
# NUL bytes. So we prefix it and hex encode it.
178
encoded = b"mandos" + binascii.hexlify(password)
179
if len(encoded) > 2048:
180
# GnuPG can't handle long passwords, so encode differently
181
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
182
.replace(b"\n", b"\\n")
183
.replace(b"\0", b"\\x00"))
186
def encrypt(self, data, password):
187
passphrase = self.password_encode(password)
188
with tempfile.NamedTemporaryFile(dir=self.tempdir
190
passfile.write(passphrase)
192
proc = subprocess.Popen(['gpg', '--symmetric',
196
stdin = subprocess.PIPE,
197
stdout = subprocess.PIPE,
198
stderr = subprocess.PIPE)
199
ciphertext, err = proc.communicate(input = data)
200
if proc.returncode != 0:
204
def decrypt(self, data, password):
205
passphrase = self.password_encode(password)
206
with tempfile.NamedTemporaryFile(dir = self.tempdir
208
passfile.write(passphrase)
210
proc = subprocess.Popen(['gpg', '--decrypt',
214
stdin = subprocess.PIPE,
215
stdout = subprocess.PIPE,
216
stderr = subprocess.PIPE)
217
decrypted_plaintext, err = proc.communicate(input
219
if proc.returncode != 0:
221
return decrypted_plaintext
104
224
class AvahiError(Exception):
105
225
def __init__(self, value, *args, **kwargs):
298
436
interval: datetime.timedelta(); How often to start a new checker
299
437
last_approval_request: datetime.datetime(); (UTC) or None
300
438
last_checked_ok: datetime.datetime(); (UTC) or None
301
last_enabled: datetime.datetime(); (UTC)
439
last_checker_status: integer between 0 and 255 reflecting exit
440
status of last checker. -1 reflects crashed
441
checker, -2 means no checker completed yet.
442
last_enabled: datetime.datetime(); (UTC) or None
302
443
name: string; from the config file, used in log messages and
303
444
D-Bus identifiers
304
445
secret: bytestring; sent verbatim (over TLS) to client
305
446
timeout: datetime.timedelta(); How long from last_checked_ok
306
447
until this client is disabled
307
extended_timeout: extra long timeout when password has been sent
448
extended_timeout: extra long timeout when secret has been sent
308
449
runtime_expansions: Allowed attributes for runtime expansion.
309
450
expires: datetime.datetime(); time (UTC) when a client will be
310
451
disabled, or None
452
server_settings: The server_settings dict from main()
313
455
runtime_expansions = ("approval_delay", "approval_duration",
314
"created", "enabled", "fingerprint",
315
"host", "interval", "last_checked_ok",
456
"created", "enabled", "expires",
457
"fingerprint", "host", "interval",
458
"last_approval_request", "last_checked_ok",
316
459
"last_enabled", "name", "timeout")
460
client_defaults = { "timeout": "PT5M",
461
"extended_timeout": "PT15M",
463
"checker": "fping -q -- %%(host)s",
465
"approval_delay": "PT0S",
466
"approval_duration": "PT1S",
467
"approved_by_default": "True",
318
471
def timeout_milliseconds(self):
319
472
"Return the 'timeout' attribute in milliseconds"
320
return _timedelta_to_milliseconds(self.timeout)
473
return timedelta_to_milliseconds(self.timeout)
322
475
def extended_timeout_milliseconds(self):
323
476
"Return the 'extended_timeout' attribute in milliseconds"
324
return _timedelta_to_milliseconds(self.extended_timeout)
477
return timedelta_to_milliseconds(self.extended_timeout)
326
479
def interval_milliseconds(self):
327
480
"Return the 'interval' attribute in milliseconds"
328
return _timedelta_to_milliseconds(self.interval)
481
return timedelta_to_milliseconds(self.interval)
330
483
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'
484
return timedelta_to_milliseconds(self.approval_delay)
487
def config_parser(config):
488
"""Construct a new dict of client settings of this form:
489
{ client_name: {setting_name: value, ...}, ...}
490
with exceptions for any special settings as defined above.
491
NOTE: Must be a pure function. Must return the same result
492
value given the same arguments.
495
for client_name in config.sections():
496
section = dict(config.items(client_name))
497
client = settings[client_name] = {}
499
client["host"] = section["host"]
500
# Reformat values from string types to Python types
501
client["approved_by_default"] = config.getboolean(
502
client_name, "approved_by_default")
503
client["enabled"] = config.getboolean(client_name,
506
client["fingerprint"] = (section["fingerprint"].upper()
508
if "secret" in section:
509
client["secret"] = section["secret"].decode("base64")
510
elif "secfile" in section:
511
with open(os.path.expanduser(os.path.expandvars
512
(section["secfile"])),
514
client["secret"] = secfile.read()
516
raise TypeError("No secret or secfile for section {0}"
518
client["timeout"] = string_to_delta(section["timeout"])
519
client["extended_timeout"] = string_to_delta(
520
section["extended_timeout"])
521
client["interval"] = string_to_delta(section["interval"])
522
client["approval_delay"] = string_to_delta(
523
section["approval_delay"])
524
client["approval_duration"] = string_to_delta(
525
section["approval_duration"])
526
client["checker_command"] = section["checker"]
527
client["last_approval_request"] = None
528
client["last_checked_ok"] = None
529
client["last_checker_status"] = -2
533
def __init__(self, settings, name = None, server_settings=None):
535
if server_settings is None:
537
self.server_settings = server_settings
538
# adding all client settings
539
for setting, value in settings.iteritems():
540
setattr(self, setting, value)
543
if not hasattr(self, "last_enabled"):
544
self.last_enabled = datetime.datetime.utcnow()
545
if not hasattr(self, "expires"):
546
self.expires = (datetime.datetime.utcnow()
549
self.last_enabled = None
340
552
logger.debug("Creating client %r", self.name)
341
553
# Uppercase and remove spaces from fingerprint for later
342
554
# comparison purposes with return value from the fingerprint()
344
self.fingerprint = (config["fingerprint"].upper()
346
556
logger.debug(" Fingerprint: %s", self.fingerprint)
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
557
self.created = settings.get("created",
558
datetime.datetime.utcnow())
560
# attributes specific for this server instance
367
561
self.checker = None
368
562
self.checker_initiator_tag = None
369
563
self.disable_initiator_tag = None
371
564
self.checker_callback_tag = None
372
self.checker_command = config["checker"]
373
565
self.current_checker_command = None
374
self.last_connect = None
375
self._approved = None
376
self.approved_by_default = config.get("approved_by_default",
378
567
self.approvals_pending = 0
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())
568
self.changedstate = (multiprocessing_manager
569
.Condition(multiprocessing_manager
571
self.client_structure = [attr for attr in
572
self.__dict__.iterkeys()
573
if not attr.startswith("_")]
574
self.client_structure.append("client_structure")
576
for name, t in inspect.getmembers(type(self),
580
if not name.startswith("_"):
581
self.client_structure.append(name)
583
# Send notice to process children that client state has changed
385
584
def send_changedstate(self):
386
self.changedstate.acquire()
387
self.changedstate.notify_all()
388
self.changedstate.release()
585
with self.changedstate:
586
self.changedstate.notify_all()
390
588
def enable(self):
391
589
"""Start this client's checker and timeout hooks"""
392
590
if getattr(self, "enabled", False):
393
591
# Already enabled
593
self.expires = datetime.datetime.utcnow() + self.timeout
595
self.last_enabled = datetime.datetime.utcnow()
395
597
self.send_changedstate()
599
def disable(self, quiet=True):
600
"""Disable this client."""
601
if not getattr(self, "enabled", False):
604
logger.info("Disabling client %s", self.name)
605
if getattr(self, "disable_initiator_tag", None) is not None:
606
gobject.source_remove(self.disable_initiator_tag)
607
self.disable_initiator_tag = None
609
if getattr(self, "checker_initiator_tag", None) is not None:
610
gobject.source_remove(self.checker_initiator_tag)
611
self.checker_initiator_tag = None
615
self.send_changedstate()
616
# Do not run this again if called by a gobject.timeout_add
622
def init_checker(self):
396
623
# Schedule a new checker to be started an 'interval' from now,
397
624
# and every interval from then on.
625
if self.checker_initiator_tag is not None:
626
gobject.source_remove(self.checker_initiator_tag)
398
627
self.checker_initiator_tag = (gobject.timeout_add
399
628
(self.interval_milliseconds(),
400
629
self.start_checker))
401
630
# Schedule a disable() when 'timeout' has passed
402
self.expires = datetime.datetime.utcnow() + self.timeout
631
if self.disable_initiator_tag is not None:
632
gobject.source_remove(self.disable_initiator_tag)
403
633
self.disable_initiator_tag = (gobject.timeout_add
404
634
(self.timeout_milliseconds(),
407
self.last_enabled = datetime.datetime.utcnow()
408
636
# Also start a new checker *right now*.
409
637
self.start_checker()
411
def disable(self, quiet=True):
412
"""Disable this client."""
413
if not getattr(self, "enabled", False):
416
self.send_changedstate()
418
logger.info("Disabling client %s", self.name)
419
if getattr(self, "disable_initiator_tag", False):
420
gobject.source_remove(self.disable_initiator_tag)
421
self.disable_initiator_tag = None
423
if getattr(self, "checker_initiator_tag", False):
424
gobject.source_remove(self.checker_initiator_tag)
425
self.checker_initiator_tag = None
427
if self.disable_hook:
428
self.disable_hook(self)
430
# Do not run this again if called by a gobject.timeout_add
434
self.disable_hook = None
437
639
def checker_callback(self, pid, condition, command):
438
640
"""The checker has completed, so take appropriate actions."""
439
641
self.checker_callback_tag = None
440
642
self.checker = None
441
643
if os.WIFEXITED(condition):
442
exitstatus = os.WEXITSTATUS(condition)
644
self.last_checker_status = os.WEXITSTATUS(condition)
645
if self.last_checker_status == 0:
444
646
logger.info("Checker for %(name)s succeeded",
446
648
self.checked_ok()
624
def _is_dbus_property(obj):
625
return getattr(obj, "_dbus_is_property", False)
879
def _is_dbus_thing(thing):
880
"""Returns a function testing if an attribute is a D-Bus thing
882
If called like _is_dbus_thing("method") it returns a function
883
suitable for use as predicate to inspect.getmembers().
885
return lambda obj: getattr(obj, "_dbus_is_{0}".format(thing),
627
def _get_all_dbus_properties(self):
888
def _get_all_dbus_things(self, thing):
628
889
"""Returns a generator of (name, attribute) pairs
630
return ((prop._dbus_name, prop)
632
inspect.getmembers(self, self._is_dbus_property))
891
return ((getattr(athing.__get__(self), "_dbus_name",
893
athing.__get__(self))
894
for cls in self.__class__.__mro__
896
inspect.getmembers(cls,
897
self._is_dbus_thing(thing)))
634
# def _get_dbus_property(self, interface_name, property_name):
635
# """Returns a bound method if one exists which is a D-Bus
636
# property with the specified name and interface.
638
# print("get_property({0!r}, {1!r}".format(interface_name, property_name),file=sys.stderr)
639
# print(dir(self), sys.stderr)
640
# for name in (property_name,
641
# property_name + "_dbus_property"):
642
# prop = getattr(self, name, None)
644
# or not self._is_dbus_property(prop)
645
# or prop._dbus_name != property_name
646
# or (interface_name and prop._dbus_interface
647
# and interface_name != prop._dbus_interface)):
651
# raise DBusPropertyNotFound(self.dbus_object_path + ":"
652
# + interface_name + "."
655
899
def _get_dbus_property(self, interface_name, property_name):
656
900
"""Returns a bound method if one exists which is a D-Bus
657
901
property with the specified name and interface.
659
for name, value in inspect.getmembers(self, self._is_dbus_property):
660
if value._dbus_name == property_name and value._dbus_interface == interface_name:
903
for cls in self.__class__.__mro__:
904
for name, value in (inspect.getmembers
906
self._is_dbus_thing("property"))):
907
if (value._dbus_name == property_name
908
and value._dbus_interface == interface_name):
909
return value.__get__(self)
663
911
# No such property
664
912
raise DBusPropertyNotFound(self.dbus_object_path + ":"
665
913
+ interface_name + "."
669
916
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
670
917
out_signature="v")
764
1047
except (AttributeError, xml.dom.DOMException,
765
1048
xml.parsers.expat.ExpatError) as error:
766
1049
logger.error("Failed to override Introspection method",
768
1051
return xmlstring
771
def datetime_to_dbus (dt, variant_level=0):
1054
def datetime_to_dbus(dt, variant_level=0):
772
1055
"""Convert a UTC datetime.datetime() to a D-Bus type."""
774
1057
return dbus.String("", variant_level = variant_level)
775
1058
return dbus.String(dt.isoformat(),
776
1059
variant_level=variant_level)
778
class transitional_clientdbus(DBusObjectWithProperties.__metaclass__):
779
def __new__(mcs, name, bases, attr):
780
for key, old_dbusobj in attr.items():
781
new_interface = getattr(old_dbusobj, "_dbus_interface", "").replace("se.bsnet.fukt.", "se.recompile.")
782
if getattr(old_dbusobj, "_dbus_is_signal", False):
783
unwrappedfunc = dict(zip(old_dbusobj.func_code.co_freevars,
784
old_dbusobj.__closure__))["func"].cell_contents
785
newfunc = types.FunctionType(unwrappedfunc.func_code,
786
unwrappedfunc.func_globals,
787
unwrappedfunc.func_name,
788
unwrappedfunc.func_defaults,
789
unwrappedfunc.func_closure)
790
new_dbusfunc = dbus.service.signal(
791
new_interface, old_dbusobj._dbus_signature)(newfunc)
792
attr["_transitional_{0}_1".format(key)] = new_dbusfunc
793
attr["_transitional_{0}_0".format(key)] = old_dbusobj
794
def fixscope(func1, func2):
795
def newcall(*args, **kwargs):
796
func1(*args, **kwargs)
797
func2(*args, **kwargs)
800
attr[key] = fixscope(
801
old_dbusobj, attr["_transitional_{0}_1".format(key)])
803
if getattr(old_dbusobj, "_dbus_is_method", False):
804
new_dbusfunc = (dbus.service.method
806
old_dbusobj._dbus_in_signature,
807
old_dbusobj._dbus_out_signature)
809
(old_dbusobj.func_code,
810
old_dbusobj.func_globals,
811
old_dbusobj.func_name,
812
old_dbusobj.func_defaults,
813
old_dbusobj.func_closure)))
815
attr["_transitional_{0}".format(key)] = new_dbusfunc
816
if getattr(old_dbusobj, "_dbus_is_property", False):
817
new_dbusfunc = (dbus_service_property
819
old_dbusobj._dbus_signature,
820
old_dbusobj._dbus_access,
821
old_dbusobj._dbus_get_args_options["byte_arrays"])
823
(old_dbusobj.func_code,
824
old_dbusobj.func_globals,
825
old_dbusobj.func_name,
826
old_dbusobj.func_defaults,
827
old_dbusobj.func_closure)))
829
attr["_transitional_{0}".format(key)] = new_dbusfunc
830
return type.__new__(mcs, name, bases, attr)
1062
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1063
"""A class decorator; applied to a subclass of
1064
dbus.service.Object, it will add alternate D-Bus attributes with
1065
interface names according to the "alt_interface_names" mapping.
1068
@alternate_dbus_interfaces({"org.example.Interface":
1069
"net.example.AlternateInterface"})
1070
class SampleDBusObject(dbus.service.Object):
1071
@dbus.service.method("org.example.Interface")
1072
def SampleDBusMethod():
1075
The above "SampleDBusMethod" on "SampleDBusObject" will be
1076
reachable via two interfaces: "org.example.Interface" and
1077
"net.example.AlternateInterface", the latter of which will have
1078
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1079
"true", unless "deprecate" is passed with a False value.
1081
This works for methods and signals, and also for D-Bus properties
1082
(from DBusObjectWithProperties) and interfaces (from the
1083
dbus_interface_annotations decorator).
1086
for orig_interface_name, alt_interface_name in (
1087
alt_interface_names.iteritems()):
1089
interface_names = set()
1090
# Go though all attributes of the class
1091
for attrname, attribute in inspect.getmembers(cls):
1092
# Ignore non-D-Bus attributes, and D-Bus attributes
1093
# with the wrong interface name
1094
if (not hasattr(attribute, "_dbus_interface")
1095
or not attribute._dbus_interface
1096
.startswith(orig_interface_name)):
1098
# Create an alternate D-Bus interface name based on
1100
alt_interface = (attribute._dbus_interface
1101
.replace(orig_interface_name,
1102
alt_interface_name))
1103
interface_names.add(alt_interface)
1104
# Is this a D-Bus signal?
1105
if getattr(attribute, "_dbus_is_signal", False):
1106
# Extract the original non-method undecorated
1107
# function by black magic
1108
nonmethod_func = (dict(
1109
zip(attribute.func_code.co_freevars,
1110
attribute.__closure__))["func"]
1112
# Create a new, but exactly alike, function
1113
# object, and decorate it to be a new D-Bus signal
1114
# with the alternate D-Bus interface name
1115
new_function = (dbus.service.signal
1117
attribute._dbus_signature)
1118
(types.FunctionType(
1119
nonmethod_func.func_code,
1120
nonmethod_func.func_globals,
1121
nonmethod_func.func_name,
1122
nonmethod_func.func_defaults,
1123
nonmethod_func.func_closure)))
1124
# Copy annotations, if any
1126
new_function._dbus_annotations = (
1127
dict(attribute._dbus_annotations))
1128
except AttributeError:
1130
# Define a creator of a function to call both the
1131
# original and alternate functions, so both the
1132
# original and alternate signals gets sent when
1133
# the function is called
1134
def fixscope(func1, func2):
1135
"""This function is a scope container to pass
1136
func1 and func2 to the "call_both" function
1137
outside of its arguments"""
1138
def call_both(*args, **kwargs):
1139
"""This function will emit two D-Bus
1140
signals by calling func1 and func2"""
1141
func1(*args, **kwargs)
1142
func2(*args, **kwargs)
1144
# Create the "call_both" function and add it to
1146
attr[attrname] = fixscope(attribute, new_function)
1147
# Is this a D-Bus method?
1148
elif getattr(attribute, "_dbus_is_method", False):
1149
# Create a new, but exactly alike, function
1150
# object. Decorate it to be a new D-Bus method
1151
# with the alternate D-Bus interface name. Add it
1153
attr[attrname] = (dbus.service.method
1155
attribute._dbus_in_signature,
1156
attribute._dbus_out_signature)
1158
(attribute.func_code,
1159
attribute.func_globals,
1160
attribute.func_name,
1161
attribute.func_defaults,
1162
attribute.func_closure)))
1163
# Copy annotations, if any
1165
attr[attrname]._dbus_annotations = (
1166
dict(attribute._dbus_annotations))
1167
except AttributeError:
1169
# Is this a D-Bus property?
1170
elif getattr(attribute, "_dbus_is_property", False):
1171
# Create a new, but exactly alike, function
1172
# object, and decorate it to be a new D-Bus
1173
# property with the alternate D-Bus interface
1174
# name. Add it to the class.
1175
attr[attrname] = (dbus_service_property
1177
attribute._dbus_signature,
1178
attribute._dbus_access,
1180
._dbus_get_args_options
1183
(attribute.func_code,
1184
attribute.func_globals,
1185
attribute.func_name,
1186
attribute.func_defaults,
1187
attribute.func_closure)))
1188
# Copy annotations, if any
1190
attr[attrname]._dbus_annotations = (
1191
dict(attribute._dbus_annotations))
1192
except AttributeError:
1194
# Is this a D-Bus interface?
1195
elif getattr(attribute, "_dbus_is_interface", False):
1196
# Create a new, but exactly alike, function
1197
# object. Decorate it to be a new D-Bus interface
1198
# with the alternate D-Bus interface name. Add it
1200
attr[attrname] = (dbus_interface_annotations
1203
(attribute.func_code,
1204
attribute.func_globals,
1205
attribute.func_name,
1206
attribute.func_defaults,
1207
attribute.func_closure)))
1209
# Deprecate all alternate interfaces
1210
iname="_AlternateDBusNames_interface_annotation{0}"
1211
for interface_name in interface_names:
1212
@dbus_interface_annotations(interface_name)
1214
return { "org.freedesktop.DBus.Deprecated":
1216
# Find an unused name
1217
for aname in (iname.format(i)
1218
for i in itertools.count()):
1219
if aname not in attr:
1223
# Replace the class with a new subclass of it with
1224
# methods, signals, etc. as created above.
1225
cls = type(b"{0}Alternate".format(cls.__name__),
1231
@alternate_dbus_interfaces({"se.recompile.Mandos":
1232
"se.bsnet.fukt.Mandos"})
832
1233
class ClientDBus(Client, DBusObjectWithProperties):
833
1234
"""A Client class using D-Bus
892
1292
last_enabled = notifychangeproperty(datetime_to_dbus,
894
1294
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
895
type_func = lambda checker: checker is not None)
1295
type_func = lambda checker:
1296
checker is not None)
896
1297
last_checked_ok = notifychangeproperty(datetime_to_dbus,
897
1298
"LastCheckedOK")
898
last_approval_request = notifychangeproperty(datetime_to_dbus,
899
"LastApprovalRequest")
1299
last_checker_status = notifychangeproperty(dbus.Int16,
1300
"LastCheckerStatus")
1301
last_approval_request = notifychangeproperty(
1302
datetime_to_dbus, "LastApprovalRequest")
900
1303
approved_by_default = notifychangeproperty(dbus.Boolean,
901
1304
"ApprovedByDefault")
902
approval_delay = notifychangeproperty(dbus.UInt16, "ApprovalDelay",
903
type_func = _timedelta_to_milliseconds)
904
approval_duration = notifychangeproperty(dbus.UInt16, "ApprovalDuration",
905
type_func = _timedelta_to_milliseconds)
1305
approval_delay = notifychangeproperty(dbus.UInt64,
1308
timedelta_to_milliseconds)
1309
approval_duration = notifychangeproperty(
1310
dbus.UInt64, "ApprovalDuration",
1311
type_func = timedelta_to_milliseconds)
906
1312
host = notifychangeproperty(dbus.String, "Host")
907
timeout = notifychangeproperty(dbus.UInt16, "Timeout",
908
type_func = _timedelta_to_milliseconds)
909
extended_timeout = notifychangeproperty(dbus.UInt16, "ExtendedTimeout",
910
type_func = _timedelta_to_milliseconds)
911
interval = notifychangeproperty(dbus.UInt16, "Interval",
912
type_func = _timedelta_to_milliseconds)
1313
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1315
timedelta_to_milliseconds)
1316
extended_timeout = notifychangeproperty(
1317
dbus.UInt64, "ExtendedTimeout",
1318
type_func = timedelta_to_milliseconds)
1319
interval = notifychangeproperty(dbus.UInt64,
1322
timedelta_to_milliseconds)
913
1323
checker_command = notifychangeproperty(dbus.String, "Checker")
915
1325
del notifychangeproperty
1575
2027
def __init__(self, server_address, RequestHandlerClass,
1576
2028
interface=None, use_ipv6=True, clients=None,
1577
gnutls_priority=None, use_dbus=True):
2029
gnutls_priority=None, use_dbus=True, socketfd=None):
1578
2030
self.enabled = False
1579
2031
self.clients = clients
1580
2032
if self.clients is None:
1581
self.clients = set()
1582
2034
self.use_dbus = use_dbus
1583
2035
self.gnutls_priority = gnutls_priority
1584
2036
IPv6_TCPServer.__init__(self, server_address,
1585
2037
RequestHandlerClass,
1586
2038
interface = interface,
1587
use_ipv6 = use_ipv6)
2039
use_ipv6 = use_ipv6,
2040
socketfd = socketfd)
1588
2041
def server_activate(self):
1589
2042
if self.enabled:
1590
2043
return socketserver.TCPServer.server_activate(self)
1591
2045
def enable(self):
1592
2046
self.enabled = True
1593
def add_pipe(self, parent_pipe):
2048
def add_pipe(self, parent_pipe, proc):
1594
2049
# Call "handle_ipc" for both data and EOF events
1595
2050
gobject.io_add_watch(parent_pipe.fileno(),
1596
2051
gobject.IO_IN | gobject.IO_HUP,
1597
2052
functools.partial(self.handle_ipc,
1598
parent_pipe = parent_pipe))
1600
2057
def handle_ipc(self, source, condition, parent_pipe=None,
1601
client_object=None):
1603
gobject.IO_IN: "IN", # There is data to read.
1604
gobject.IO_OUT: "OUT", # Data can be written (without
1606
gobject.IO_PRI: "PRI", # There is urgent data to read.
1607
gobject.IO_ERR: "ERR", # Error condition.
1608
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1609
# broken, usually for pipes and
1612
conditions_string = ' | '.join(name
1614
condition_names.iteritems()
1615
if cond & condition)
1616
# error or the other end of multiprocessing.Pipe has closed
1617
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
2058
proc = None, client_object=None):
2059
# error, or the other end of multiprocessing.Pipe has closed
2060
if condition & (gobject.IO_ERR | gobject.IO_HUP):
2061
# Wait for other process to exit
1620
2065
# Read a request from the child
2124
def rfc3339_duration_to_delta(duration):
2125
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2127
>>> rfc3339_duration_to_delta("P7D")
2128
datetime.timedelta(7)
2129
>>> rfc3339_duration_to_delta("PT60S")
2130
datetime.timedelta(0, 60)
2131
>>> rfc3339_duration_to_delta("PT60M")
2132
datetime.timedelta(0, 3600)
2133
>>> rfc3339_duration_to_delta("PT24H")
2134
datetime.timedelta(1)
2135
>>> rfc3339_duration_to_delta("P1W")
2136
datetime.timedelta(7)
2137
>>> rfc3339_duration_to_delta("PT5M30S")
2138
datetime.timedelta(0, 330)
2139
>>> rfc3339_duration_to_delta("P1DT3M20S")
2140
datetime.timedelta(1, 200)
2143
# Parsing an RFC 3339 duration with regular expressions is not
2144
# possible - there would have to be multiple places for the same
2145
# values, like seconds. The current code, while more esoteric, is
2146
# cleaner without depending on a parsing library. If Python had a
2147
# built-in library for parsing we would use it, but we'd like to
2148
# avoid excessive use of external libraries.
2150
# New type for defining tokens, syntax, and semantics all-in-one
2151
Token = collections.namedtuple("Token",
2152
("regexp", # To match token; if
2153
# "value" is not None,
2154
# must have a "group"
2156
"value", # datetime.timedelta or
2158
"followers")) # Tokens valid after
2160
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2161
# the "duration" ABNF definition in RFC 3339, Appendix A.
2162
token_end = Token(re.compile(r"$"), None, frozenset())
2163
token_second = Token(re.compile(r"(\d+)S"),
2164
datetime.timedelta(seconds=1),
2165
frozenset((token_end,)))
2166
token_minute = Token(re.compile(r"(\d+)M"),
2167
datetime.timedelta(minutes=1),
2168
frozenset((token_second, token_end)))
2169
token_hour = Token(re.compile(r"(\d+)H"),
2170
datetime.timedelta(hours=1),
2171
frozenset((token_minute, token_end)))
2172
token_time = Token(re.compile(r"T"),
2174
frozenset((token_hour, token_minute,
2176
token_day = Token(re.compile(r"(\d+)D"),
2177
datetime.timedelta(days=1),
2178
frozenset((token_time, token_end)))
2179
token_month = Token(re.compile(r"(\d+)M"),
2180
datetime.timedelta(weeks=4),
2181
frozenset((token_day, token_end)))
2182
token_year = Token(re.compile(r"(\d+)Y"),
2183
datetime.timedelta(weeks=52),
2184
frozenset((token_month, token_end)))
2185
token_week = Token(re.compile(r"(\d+)W"),
2186
datetime.timedelta(weeks=1),
2187
frozenset((token_end,)))
2188
token_duration = Token(re.compile(r"P"), None,
2189
frozenset((token_year, token_month,
2190
token_day, token_time,
2192
# Define starting values
2193
value = datetime.timedelta() # Value so far
2195
followers = frozenset((token_duration,)) # Following valid tokens
2196
s = duration # String left to parse
2197
# Loop until end token is found
2198
while found_token is not token_end:
2199
# Search for any currently valid tokens
2200
for token in followers:
2201
match = token.regexp.match(s)
2202
if match is not None:
2204
if token.value is not None:
2205
# Value found, parse digits
2206
factor = int(match.group(1), 10)
2207
# Add to value so far
2208
value += factor * token.value
2209
# Strip token from string
2210
s = token.regexp.sub("", s, 1)
2213
# Set valid next tokens
2214
followers = found_token.followers
2217
# No currently valid tokens were found
2218
raise ValueError("Invalid RFC 3339 duration")
1671
2223
def string_to_delta(interval):
1672
2224
"""Parse a string and return a datetime.timedelta
1840
2405
for option in server_settings.keys():
1841
2406
if type(server_settings[option]) is str:
1842
2407
server_settings[option] = unicode(server_settings[option])
2408
# Force all boolean options to be boolean
2409
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2410
"foreground", "zeroconf"):
2411
server_settings[option] = bool(server_settings[option])
2412
# Debug implies foreground
2413
if server_settings["debug"]:
2414
server_settings["foreground"] = True
1843
2415
# Now we have our good server settings in "server_settings"
1845
2417
##################################################################
2419
if (not server_settings["zeroconf"] and
2420
not (server_settings["port"]
2421
or server_settings["socket"] != "")):
2422
parser.error("Needs port or socket to work without"
1847
2425
# For convenience
1848
2426
debug = server_settings["debug"]
1849
2427
debuglevel = server_settings["debuglevel"]
1850
2428
use_dbus = server_settings["use_dbus"]
1851
2429
use_ipv6 = server_settings["use_ipv6"]
2430
stored_state_path = os.path.join(server_settings["statedir"],
2432
foreground = server_settings["foreground"]
2433
zeroconf = server_settings["zeroconf"]
2436
initlogger(debug, logging.DEBUG)
2441
level = getattr(logging, debuglevel.upper())
2442
initlogger(debug, level)
1853
2444
if server_settings["servicename"] != "Mandos":
1854
2445
syslogger.setFormatter(logging.Formatter
1855
('Mandos (%s) [%%(process)d]:'
1856
' %%(levelname)s: %%(message)s'
1857
% server_settings["servicename"]))
2446
('Mandos ({0}) [%(process)d]:'
2447
' %(levelname)s: %(message)s'
2448
.format(server_settings
1859
2451
# Parse config file with clients
1860
client_defaults = { "timeout": "5m",
1861
"extended_timeout": "15m",
1863
"checker": "fping -q -- %%(host)s",
1865
"approval_delay": "0s",
1866
"approval_duration": "1s",
1868
client_config = configparser.SafeConfigParser(client_defaults)
2452
client_config = configparser.SafeConfigParser(Client
1869
2454
client_config.read(os.path.join(server_settings["configdir"],
1870
2455
"clients.conf"))
1872
2457
global mandos_dbus_service
1873
2458
mandos_dbus_service = None
2461
if server_settings["socket"] != "":
2462
socketfd = server_settings["socket"]
1875
2463
tcp_server = MandosServer((server_settings["address"],
1876
2464
server_settings["port"]),
1932
2513
.gnutls_global_set_log_function(debug_gnutls))
1934
2515
# Redirect stdin so all checkers get /dev/null
1935
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2516
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1936
2517
os.dup2(null, sys.stdin.fileno())
1940
# No console logging
1941
logger.removeHandler(console)
1943
2521
# Need to fork before connecting to D-Bus
1945
2523
# Close all input and output, do double fork, etc.
2526
# multiprocessing will use threads, so before we use gobject we
2527
# need to inform gobject that threads will be used.
2528
gobject.threads_init()
1948
2530
global main_loop
1949
2531
# From the Avahi example code
1950
DBusGMainLoop(set_as_default=True )
2532
DBusGMainLoop(set_as_default=True)
1951
2533
main_loop = gobject.MainLoop()
1952
2534
bus = dbus.SystemBus()
1953
2535
# End of Avahi example code
1956
bus_name = dbus.service.BusName("se.bsnet.fukt.Mandos",
1957
bus, do_not_queue=True)
1958
bus_name2 = dbus.service.BusName("se.recompile.Mandos",
1959
bus, do_not_queue=True)
2538
bus_name = dbus.service.BusName("se.recompile.Mandos",
2539
bus, do_not_queue=True)
2540
old_bus_name = (dbus.service.BusName
2541
("se.bsnet.fukt.Mandos", bus,
1960
2543
except dbus.exceptions.NameExistsException as e:
1961
logger.error(unicode(e) + ", disabling D-Bus")
2544
logger.error("Disabling D-Bus:", exc_info=e)
1962
2545
use_dbus = False
1963
2546
server_settings["use_dbus"] = False
1964
2547
tcp_server.use_dbus = False
1965
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1966
service = AvahiService(name = server_settings["servicename"],
1967
servicetype = "_mandos._tcp",
1968
protocol = protocol, bus = bus)
1969
if server_settings["interface"]:
1970
service.interface = (if_nametoindex
1971
(str(server_settings["interface"])))
2549
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2550
service = AvahiServiceToSyslog(name =
2551
server_settings["servicename"],
2552
servicetype = "_mandos._tcp",
2553
protocol = protocol, bus = bus)
2554
if server_settings["interface"]:
2555
service.interface = (if_nametoindex
2556
(str(server_settings["interface"])))
1973
2558
global multiprocessing_manager
1974
2559
multiprocessing_manager = multiprocessing.Manager()
1976
2561
client_class = Client
1978
2563
client_class = functools.partial(ClientDBus, bus = bus)
1979
def client_config_items(config, section):
1980
special_settings = {
1981
"approved_by_default":
1982
lambda: config.getboolean(section,
1983
"approved_by_default"),
1985
for name, value in config.items(section):
2565
client_settings = Client.config_parser(client_config)
2566
old_client_settings = {}
2569
# This is used to redirect stdout and stderr for checker processes
2571
wnull = open(os.devnull, "w") # A writable /dev/null
2572
# Only used if server is running in foreground but not in debug
2574
if debug or not foreground:
2577
# Get client data and settings from last running state.
2578
if server_settings["restore"]:
2580
with open(stored_state_path, "rb") as stored_state:
2581
clients_data, old_client_settings = (pickle.load
2583
os.remove(stored_state_path)
2584
except IOError as e:
2585
if e.errno == errno.ENOENT:
2586
logger.warning("Could not load persistent state: {0}"
2587
.format(os.strerror(e.errno)))
2589
logger.critical("Could not load persistent state:",
2592
except EOFError as e:
2593
logger.warning("Could not load persistent state: "
2594
"EOFError:", exc_info=e)
2596
with PGPEngine() as pgp:
2597
for client_name, client in clients_data.iteritems():
2598
# Skip removed clients
2599
if client_name not in client_settings:
2602
# Decide which value to use after restoring saved state.
2603
# We have three different values: Old config file,
2604
# new config file, and saved state.
2605
# New config value takes precedence if it differs from old
2606
# config value, otherwise use saved state.
2607
for name, value in client_settings[client_name].items():
2609
# For each value in new config, check if it
2610
# differs from the old config value (Except for
2611
# the "secret" attribute)
2612
if (name != "secret" and
2613
value != old_client_settings[client_name]
2615
client[name] = value
2619
# Clients who has passed its expire date can still be
2620
# enabled if its last checker was successful. Clients
2621
# whose checker succeeded before we stored its state is
2622
# assumed to have successfully run all checkers during
2624
if client["enabled"]:
2625
if datetime.datetime.utcnow() >= client["expires"]:
2626
if not client["last_checked_ok"]:
2628
"disabling client {0} - Client never "
2629
"performed a successful checker"
2630
.format(client_name))
2631
client["enabled"] = False
2632
elif client["last_checker_status"] != 0:
2634
"disabling client {0} - Client "
2635
"last checker failed with error code {1}"
2636
.format(client_name,
2637
client["last_checker_status"]))
2638
client["enabled"] = False
2640
client["expires"] = (datetime.datetime
2642
+ client["timeout"])
2643
logger.debug("Last checker succeeded,"
2644
" keeping {0} enabled"
2645
.format(client_name))
1987
yield (name, special_settings[name]())
1991
tcp_server.clients.update(set(
1992
client_class(name = section,
1993
config= dict(client_config_items(
1994
client_config, section)))
1995
for section in client_config.sections()))
2647
client["secret"] = (
2648
pgp.decrypt(client["encrypted_secret"],
2649
client_settings[client_name]
2652
# If decryption fails, we use secret from new settings
2653
logger.debug("Failed to decrypt {0} old secret"
2654
.format(client_name))
2655
client["secret"] = (
2656
client_settings[client_name]["secret"])
2658
# Add/remove clients based on new changes made to config
2659
for client_name in (set(old_client_settings)
2660
- set(client_settings)):
2661
del clients_data[client_name]
2662
for client_name in (set(client_settings)
2663
- set(old_client_settings)):
2664
clients_data[client_name] = client_settings[client_name]
2666
# Create all client objects
2667
for client_name, client in clients_data.iteritems():
2668
tcp_server.clients[client_name] = client_class(
2669
name = client_name, settings = client,
2670
server_settings = server_settings)
1996
2672
if not tcp_server.clients:
1997
2673
logger.warning("No clients defined")
2003
pidfile.write(str(pid) + "\n".encode("utf-8"))
2006
logger.error("Could not write to file %r with PID %d",
2009
# "pidfile" was never created
2676
if pidfile is not None:
2680
pidfile.write(str(pid) + "\n".encode("utf-8"))
2682
logger.error("Could not write to file %r with PID %d",
2011
2685
del pidfilename
2013
signal.signal(signal.SIGINT, signal.SIG_IGN)
2015
2687
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2016
2688
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2019
class MandosDBusService(dbus.service.Object):
2691
@alternate_dbus_interfaces({"se.recompile.Mandos":
2692
"se.bsnet.fukt.Mandos"})
2693
class MandosDBusService(DBusObjectWithProperties):
2020
2694
"""A D-Bus proxy object"""
2021
2695
def __init__(self):
2022
2696
dbus.service.Object.__init__(self, bus, "/")
2023
_interface = "se.bsnet.fukt.Mandos"
2697
_interface = "se.recompile.Mandos"
2699
@dbus_interface_annotations(_interface)
2701
return { "org.freedesktop.DBus.Property"
2702
".EmitsChangedSignal":
2025
2705
@dbus.service.signal(_interface, signature="o")
2026
2706
def ClientAdded(self, objpath):
2074
2755
"Cleanup function; run on exit"
2759
multiprocessing.active_children()
2761
if not (tcp_server.clients or client_settings):
2764
# Store client before exiting. Secrets are encrypted with key
2765
# based on what config file has. If config file is
2766
# removed/edited, old secret will thus be unrecovable.
2768
with PGPEngine() as pgp:
2769
for client in tcp_server.clients.itervalues():
2770
key = client_settings[client.name]["secret"]
2771
client.encrypted_secret = pgp.encrypt(client.secret,
2775
# A list of attributes that can not be pickled
2777
exclude = set(("bus", "changedstate", "secret",
2778
"checker", "server_settings"))
2779
for name, typ in (inspect.getmembers
2780
(dbus.service.Object)):
2783
client_dict["encrypted_secret"] = (client
2785
for attr in client.client_structure:
2786
if attr not in exclude:
2787
client_dict[attr] = getattr(client, attr)
2789
clients[client.name] = client_dict
2790
del client_settings[client.name]["secret"]
2793
with (tempfile.NamedTemporaryFile
2794
(mode='wb', suffix=".pickle", prefix='clients-',
2795
dir=os.path.dirname(stored_state_path),
2796
delete=False)) as stored_state:
2797
pickle.dump((clients, client_settings), stored_state)
2798
tempname=stored_state.name
2799
os.rename(tempname, stored_state_path)
2800
except (IOError, OSError) as e:
2806
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
2807
logger.warning("Could not save persistent state: {0}"
2808
.format(os.strerror(e.errno)))
2810
logger.warning("Could not save persistent state:",
2814
# Delete all clients, and settings from config
2077
2815
while tcp_server.clients:
2078
client = tcp_server.clients.pop()
2816
name, client = tcp_server.clients.popitem()
2080
2818
client.remove_from_connection()
2081
client.disable_hook = None
2082
2819
# Don't signal anything except ClientRemoved
2083
2820
client.disable(quiet=True)
2085
2822
# Emit D-Bus signal
2086
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
2823
mandos_dbus_service.ClientRemoved(client
2826
client_settings.clear()
2089
2828
atexit.register(cleanup)
2091
for client in tcp_server.clients:
2830
for client in tcp_server.clients.itervalues():
2093
2832
# Emit D-Bus signal
2094
2833
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2834
# Need to initiate checking of clients
2836
client.init_checker()
2097
2838
tcp_server.enable()
2098
2839
tcp_server.server_activate()
2100
2841
# Find out what port we got
2101
service.port = tcp_server.socket.getsockname()[1]
2843
service.port = tcp_server.socket.getsockname()[1]
2103
2845
logger.info("Now listening on address %r, port %d,"
2104
" flowinfo %d, scope_id %d"
2105
% tcp_server.socket.getsockname())
2846
" flowinfo %d, scope_id %d",
2847
*tcp_server.socket.getsockname())
2107
logger.info("Now listening on address %r, port %d"
2108
% tcp_server.socket.getsockname())
2849
logger.info("Now listening on address %r, port %d",
2850
*tcp_server.socket.getsockname())
2110
2852
#service.interface = tcp_server.socket.getsockname()[3]
2113
# From the Avahi example code
2116
except dbus.exceptions.DBusException as error:
2117
logger.critical("DBusException: %s", error)
2120
# End of Avahi example code
2856
# From the Avahi example code
2859
except dbus.exceptions.DBusException as error:
2860
logger.critical("D-Bus Exception", exc_info=error)
2863
# End of Avahi example code
2122
2865
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2123
2866
lambda *args, **kwargs: