81
88
except ImportError:
82
89
SO_BINDTODEVICE = None
87
#logger = logging.getLogger('mandos')
88
logger = logging.Logger('mandos')
92
stored_state_file = "clients.pickle"
94
logger = logging.getLogger()
89
95
syslogger = (logging.handlers.SysLogHandler
90
96
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
91
97
address = str("/dev/log")))
92
syslogger.setFormatter(logging.Formatter
93
('Mandos [%(process)d]: %(levelname)s:'
95
logger.addHandler(syslogger)
97
console = logging.StreamHandler()
98
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
101
logger.addHandler(console)
100
if_nametoindex = (ctypes.cdll.LoadLibrary
101
(ctypes.util.find_library("c"))
103
except (OSError, AttributeError):
104
def if_nametoindex(interface):
105
"Get an interface index the hard way, i.e. using fcntl()"
106
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
107
with contextlib.closing(socket.socket()) as s:
108
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
109
struct.pack(str("16s16x"),
111
interface_index = struct.unpack(str("I"),
113
return interface_index
116
def initlogger(debug, level=logging.WARNING):
117
"""init logger and add loglevel"""
119
syslogger.setFormatter(logging.Formatter
120
('Mandos [%(process)d]: %(levelname)s:'
122
logger.addHandler(syslogger)
125
console = logging.StreamHandler()
126
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
130
logger.addHandler(console)
131
logger.setLevel(level)
134
class PGPError(Exception):
135
"""Exception if encryption/decryption fails"""
139
class PGPEngine(object):
140
"""A simple class for OpenPGP symmetric encryption & decryption"""
142
self.gnupg = GnuPGInterface.GnuPG()
143
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
144
self.gnupg = GnuPGInterface.GnuPG()
145
self.gnupg.options.meta_interactive = False
146
self.gnupg.options.homedir = self.tempdir
147
self.gnupg.options.extra_args.extend(['--force-mdc',
154
def __exit__(self, exc_type, exc_value, traceback):
162
if self.tempdir is not None:
163
# Delete contents of tempdir
164
for root, dirs, files in os.walk(self.tempdir,
166
for filename in files:
167
os.remove(os.path.join(root, filename))
169
os.rmdir(os.path.join(root, dirname))
171
os.rmdir(self.tempdir)
174
def password_encode(self, password):
175
# Passphrase can not be empty and can not contain newlines or
176
# NUL bytes. So we prefix it and hex encode it.
177
return b"mandos" + binascii.hexlify(password)
179
def encrypt(self, data, password):
180
self.gnupg.passphrase = self.password_encode(password)
181
with open(os.devnull, "w") as devnull:
183
proc = self.gnupg.run(['--symmetric'],
184
create_fhs=['stdin', 'stdout'],
185
attach_fhs={'stderr': devnull})
186
with contextlib.closing(proc.handles['stdin']) as f:
188
with contextlib.closing(proc.handles['stdout']) as f:
189
ciphertext = f.read()
193
self.gnupg.passphrase = None
196
def decrypt(self, data, password):
197
self.gnupg.passphrase = self.password_encode(password)
198
with open(os.devnull, "w") as devnull:
200
proc = self.gnupg.run(['--decrypt'],
201
create_fhs=['stdin', 'stdout'],
202
attach_fhs={'stderr': devnull})
203
with contextlib.closing(proc.handles['stdin']) as f:
205
with contextlib.closing(proc.handles['stdout']) as f:
206
decrypted_plaintext = f.read()
210
self.gnupg.passphrase = None
211
return decrypted_plaintext
103
214
class AvahiError(Exception):
104
215
def __init__(self, value, *args, **kwargs):
291
426
interval: datetime.timedelta(); How often to start a new checker
292
427
last_approval_request: datetime.datetime(); (UTC) or None
293
428
last_checked_ok: datetime.datetime(); (UTC) or None
294
last_enabled: datetime.datetime(); (UTC)
429
last_checker_status: integer between 0 and 255 reflecting exit
430
status of last checker. -1 reflects crashed
431
checker, -2 means no checker completed yet.
432
last_enabled: datetime.datetime(); (UTC) or None
295
433
name: string; from the config file, used in log messages and
296
434
D-Bus identifiers
297
435
secret: bytestring; sent verbatim (over TLS) to client
298
436
timeout: datetime.timedelta(); How long from last_checked_ok
299
437
until this client is disabled
300
extended_timeout: extra long timeout when password has been sent
438
extended_timeout: extra long timeout when secret has been sent
301
439
runtime_expansions: Allowed attributes for runtime expansion.
302
expire: datetime.datetime(); time (UTC) when a client will be
440
expires: datetime.datetime(); time (UTC) when a client will be
303
441
disabled, or None
306
444
runtime_expansions = ("approval_delay", "approval_duration",
307
"created", "enabled", "fingerprint",
308
"host", "interval", "last_checked_ok",
445
"created", "enabled", "expires",
446
"fingerprint", "host", "interval",
447
"last_approval_request", "last_checked_ok",
309
448
"last_enabled", "name", "timeout")
312
def _timedelta_to_milliseconds(td):
313
"Convert a datetime.timedelta() to milliseconds"
314
return ((td.days * 24 * 60 * 60 * 1000)
315
+ (td.seconds * 1000)
316
+ (td.microseconds // 1000))
449
client_defaults = { "timeout": "5m",
450
"extended_timeout": "15m",
452
"checker": "fping -q -- %%(host)s",
454
"approval_delay": "0s",
455
"approval_duration": "1s",
456
"approved_by_default": "True",
318
460
def timeout_milliseconds(self):
319
461
"Return the 'timeout' attribute in milliseconds"
320
return self._timedelta_to_milliseconds(self.timeout)
462
return timedelta_to_milliseconds(self.timeout)
322
464
def extended_timeout_milliseconds(self):
323
465
"Return the 'extended_timeout' attribute in milliseconds"
324
return self._timedelta_to_milliseconds(self.extended_timeout)
466
return timedelta_to_milliseconds(self.extended_timeout)
326
468
def interval_milliseconds(self):
327
469
"Return the 'interval' attribute in milliseconds"
328
return self._timedelta_to_milliseconds(self.interval)
470
return timedelta_to_milliseconds(self.interval)
330
472
def approval_delay_milliseconds(self):
331
return self._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'
473
return timedelta_to_milliseconds(self.approval_delay)
476
def config_parser(config):
477
"""Construct a new dict of client settings of this form:
478
{ client_name: {setting_name: value, ...}, ...}
479
with exceptions for any special settings as defined above.
480
NOTE: Must be a pure function. Must return the same result
481
value given the same arguments.
484
for client_name in config.sections():
485
section = dict(config.items(client_name))
486
client = settings[client_name] = {}
488
client["host"] = section["host"]
489
# Reformat values from string types to Python types
490
client["approved_by_default"] = config.getboolean(
491
client_name, "approved_by_default")
492
client["enabled"] = config.getboolean(client_name,
495
client["fingerprint"] = (section["fingerprint"].upper()
497
if "secret" in section:
498
client["secret"] = section["secret"].decode("base64")
499
elif "secfile" in section:
500
with open(os.path.expanduser(os.path.expandvars
501
(section["secfile"])),
503
client["secret"] = secfile.read()
505
raise TypeError("No secret or secfile for section {0}"
507
client["timeout"] = string_to_delta(section["timeout"])
508
client["extended_timeout"] = string_to_delta(
509
section["extended_timeout"])
510
client["interval"] = string_to_delta(section["interval"])
511
client["approval_delay"] = string_to_delta(
512
section["approval_delay"])
513
client["approval_duration"] = string_to_delta(
514
section["approval_duration"])
515
client["checker_command"] = section["checker"]
516
client["last_approval_request"] = None
517
client["last_checked_ok"] = None
518
client["last_checker_status"] = -2
522
def __init__(self, settings, name = None):
524
# adding all client settings
525
for setting, value in settings.iteritems():
526
setattr(self, setting, value)
529
if not hasattr(self, "last_enabled"):
530
self.last_enabled = datetime.datetime.utcnow()
531
if not hasattr(self, "expires"):
532
self.expires = (datetime.datetime.utcnow()
535
self.last_enabled = None
340
538
logger.debug("Creating client %r", self.name)
341
539
# Uppercase and remove spaces from fingerprint for later
342
540
# comparison purposes with return value from the fingerprint()
344
self.fingerprint = (config["fingerprint"].upper()
346
542
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
543
self.created = settings.get("created",
544
datetime.datetime.utcnow())
546
# attributes specific for this server instance
367
547
self.checker = None
368
548
self.checker_initiator_tag = None
369
549
self.disable_initiator_tag = None
371
550
self.checker_callback_tag = None
372
self.checker_command = config["checker"]
373
551
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
553
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())
554
self.changedstate = (multiprocessing_manager
555
.Condition(multiprocessing_manager
557
self.client_structure = [attr for attr in
558
self.__dict__.iterkeys()
559
if not attr.startswith("_")]
560
self.client_structure.append("client_structure")
562
for name, t in inspect.getmembers(type(self),
566
if not name.startswith("_"):
567
self.client_structure.append(name)
569
# Send notice to process children that client state has changed
385
570
def send_changedstate(self):
386
self.changedstate.acquire()
387
self.changedstate.notify_all()
388
self.changedstate.release()
571
with self.changedstate:
572
self.changedstate.notify_all()
390
574
def enable(self):
391
575
"""Start this client's checker and timeout hooks"""
392
576
if getattr(self, "enabled", False):
393
577
# Already enabled
395
self.send_changedstate()
579
self.expires = datetime.datetime.utcnow() + self.timeout
396
581
self.last_enabled = datetime.datetime.utcnow()
583
self.send_changedstate()
585
def disable(self, quiet=True):
586
"""Disable this client."""
587
if not getattr(self, "enabled", False):
590
logger.info("Disabling client %s", self.name)
591
if getattr(self, "disable_initiator_tag", None) is not None:
592
gobject.source_remove(self.disable_initiator_tag)
593
self.disable_initiator_tag = None
595
if getattr(self, "checker_initiator_tag", None) is not None:
596
gobject.source_remove(self.checker_initiator_tag)
597
self.checker_initiator_tag = None
601
self.send_changedstate()
602
# Do not run this again if called by a gobject.timeout_add
608
def init_checker(self):
397
609
# Schedule a new checker to be started an 'interval' from now,
398
610
# and every interval from then on.
611
if self.checker_initiator_tag is not None:
612
gobject.source_remove(self.checker_initiator_tag)
399
613
self.checker_initiator_tag = (gobject.timeout_add
400
614
(self.interval_milliseconds(),
401
615
self.start_checker))
402
616
# Schedule a disable() when 'timeout' has passed
403
self.expires = datetime.datetime.utcnow() + self.timeout
617
if self.disable_initiator_tag is not None:
618
gobject.source_remove(self.disable_initiator_tag)
404
619
self.disable_initiator_tag = (gobject.timeout_add
405
620
(self.timeout_milliseconds(),
408
622
# Also start a new checker *right now*.
409
623
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
625
def checker_callback(self, pid, condition, command):
438
626
"""The checker has completed, so take appropriate actions."""
439
627
self.checker_callback_tag = None
440
628
self.checker = None
441
629
if os.WIFEXITED(condition):
442
exitstatus = os.WEXITSTATUS(condition)
630
self.last_checker_status = os.WEXITSTATUS(condition)
631
if self.last_checker_status == 0:
444
632
logger.info("Checker for %(name)s succeeded",
446
634
self.checked_ok()
614
837
class DBusObjectWithProperties(dbus.service.Object):
615
838
"""A D-Bus object with properties.
617
840
Classes inheriting from this can use the dbus_service_property
618
841
decorator to expose methods as D-Bus properties. It exposes the
619
842
standard Get(), Set(), and GetAll() methods on the D-Bus.
623
def _is_dbus_property(obj):
624
return getattr(obj, "_dbus_is_property", False)
846
def _is_dbus_thing(thing):
847
"""Returns a function testing if an attribute is a D-Bus thing
849
If called like _is_dbus_thing("method") it returns a function
850
suitable for use as predicate to inspect.getmembers().
852
return lambda obj: getattr(obj, "_dbus_is_{0}".format(thing),
626
def _get_all_dbus_properties(self):
855
def _get_all_dbus_things(self, thing):
627
856
"""Returns a generator of (name, attribute) pairs
629
return ((prop._dbus_name, prop)
631
inspect.getmembers(self, self._is_dbus_property))
858
return ((getattr(athing.__get__(self), "_dbus_name",
860
athing.__get__(self))
861
for cls in self.__class__.__mro__
863
inspect.getmembers(cls,
864
self._is_dbus_thing(thing)))
633
866
def _get_dbus_property(self, interface_name, property_name):
634
867
"""Returns a bound method if one exists which is a D-Bus
635
868
property with the specified name and interface.
637
for name in (property_name,
638
property_name + "_dbus_property"):
639
prop = getattr(self, name, None)
641
or not self._is_dbus_property(prop)
642
or prop._dbus_name != property_name
643
or (interface_name and prop._dbus_interface
644
and interface_name != prop._dbus_interface)):
870
for cls in self.__class__.__mro__:
871
for name, value in (inspect.getmembers
873
self._is_dbus_thing("property"))):
874
if (value._dbus_name == property_name
875
and value._dbus_interface == interface_name):
876
return value.__get__(self)
647
878
# No such property
648
879
raise DBusPropertyNotFound(self.dbus_object_path + ":"
649
880
+ interface_name + "."
747
1012
except (AttributeError, xml.dom.DOMException,
748
1013
xml.parsers.expat.ExpatError) as error:
749
1014
logger.error("Failed to override Introspection method",
751
1016
return xmlstring
1019
def datetime_to_dbus(dt, variant_level=0):
1020
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1022
return dbus.String("", variant_level = variant_level)
1023
return dbus.String(dt.isoformat(),
1024
variant_level=variant_level)
1027
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1028
"""A class decorator; applied to a subclass of
1029
dbus.service.Object, it will add alternate D-Bus attributes with
1030
interface names according to the "alt_interface_names" mapping.
1033
@alternate_dbus_interfaces({"org.example.Interface":
1034
"net.example.AlternateInterface"})
1035
class SampleDBusObject(dbus.service.Object):
1036
@dbus.service.method("org.example.Interface")
1037
def SampleDBusMethod():
1040
The above "SampleDBusMethod" on "SampleDBusObject" will be
1041
reachable via two interfaces: "org.example.Interface" and
1042
"net.example.AlternateInterface", the latter of which will have
1043
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1044
"true", unless "deprecate" is passed with a False value.
1046
This works for methods and signals, and also for D-Bus properties
1047
(from DBusObjectWithProperties) and interfaces (from the
1048
dbus_interface_annotations decorator).
1051
for orig_interface_name, alt_interface_name in (
1052
alt_interface_names.iteritems()):
1054
interface_names = set()
1055
# Go though all attributes of the class
1056
for attrname, attribute in inspect.getmembers(cls):
1057
# Ignore non-D-Bus attributes, and D-Bus attributes
1058
# with the wrong interface name
1059
if (not hasattr(attribute, "_dbus_interface")
1060
or not attribute._dbus_interface
1061
.startswith(orig_interface_name)):
1063
# Create an alternate D-Bus interface name based on
1065
alt_interface = (attribute._dbus_interface
1066
.replace(orig_interface_name,
1067
alt_interface_name))
1068
interface_names.add(alt_interface)
1069
# Is this a D-Bus signal?
1070
if getattr(attribute, "_dbus_is_signal", False):
1071
# Extract the original non-method function by
1073
nonmethod_func = (dict(
1074
zip(attribute.func_code.co_freevars,
1075
attribute.__closure__))["func"]
1077
# Create a new, but exactly alike, function
1078
# object, and decorate it to be a new D-Bus signal
1079
# with the alternate D-Bus interface name
1080
new_function = (dbus.service.signal
1082
attribute._dbus_signature)
1083
(types.FunctionType(
1084
nonmethod_func.func_code,
1085
nonmethod_func.func_globals,
1086
nonmethod_func.func_name,
1087
nonmethod_func.func_defaults,
1088
nonmethod_func.func_closure)))
1089
# Copy annotations, if any
1091
new_function._dbus_annotations = (
1092
dict(attribute._dbus_annotations))
1093
except AttributeError:
1095
# Define a creator of a function to call both the
1096
# original and alternate functions, so both the
1097
# original and alternate signals gets sent when
1098
# the function is called
1099
def fixscope(func1, func2):
1100
"""This function is a scope container to pass
1101
func1 and func2 to the "call_both" function
1102
outside of its arguments"""
1103
def call_both(*args, **kwargs):
1104
"""This function will emit two D-Bus
1105
signals by calling func1 and func2"""
1106
func1(*args, **kwargs)
1107
func2(*args, **kwargs)
1109
# Create the "call_both" function and add it to
1111
attr[attrname] = fixscope(attribute, new_function)
1112
# Is this a D-Bus method?
1113
elif getattr(attribute, "_dbus_is_method", False):
1114
# Create a new, but exactly alike, function
1115
# object. Decorate it to be a new D-Bus method
1116
# with the alternate D-Bus interface name. Add it
1118
attr[attrname] = (dbus.service.method
1120
attribute._dbus_in_signature,
1121
attribute._dbus_out_signature)
1123
(attribute.func_code,
1124
attribute.func_globals,
1125
attribute.func_name,
1126
attribute.func_defaults,
1127
attribute.func_closure)))
1128
# Copy annotations, if any
1130
attr[attrname]._dbus_annotations = (
1131
dict(attribute._dbus_annotations))
1132
except AttributeError:
1134
# Is this a D-Bus property?
1135
elif getattr(attribute, "_dbus_is_property", False):
1136
# Create a new, but exactly alike, function
1137
# object, and decorate it to be a new D-Bus
1138
# property with the alternate D-Bus interface
1139
# name. Add it to the class.
1140
attr[attrname] = (dbus_service_property
1142
attribute._dbus_signature,
1143
attribute._dbus_access,
1145
._dbus_get_args_options
1148
(attribute.func_code,
1149
attribute.func_globals,
1150
attribute.func_name,
1151
attribute.func_defaults,
1152
attribute.func_closure)))
1153
# Copy annotations, if any
1155
attr[attrname]._dbus_annotations = (
1156
dict(attribute._dbus_annotations))
1157
except AttributeError:
1159
# Is this a D-Bus interface?
1160
elif getattr(attribute, "_dbus_is_interface", False):
1161
# Create a new, but exactly alike, function
1162
# object. Decorate it to be a new D-Bus interface
1163
# with the alternate D-Bus interface name. Add it
1165
attr[attrname] = (dbus_interface_annotations
1168
(attribute.func_code,
1169
attribute.func_globals,
1170
attribute.func_name,
1171
attribute.func_defaults,
1172
attribute.func_closure)))
1174
# Deprecate all alternate interfaces
1175
iname="_AlternateDBusNames_interface_annotation{0}"
1176
for interface_name in interface_names:
1177
@dbus_interface_annotations(interface_name)
1179
return { "org.freedesktop.DBus.Deprecated":
1181
# Find an unused name
1182
for aname in (iname.format(i)
1183
for i in itertools.count()):
1184
if aname not in attr:
1188
# Replace the class with a new subclass of it with
1189
# methods, signals, etc. as created above.
1190
cls = type(b"{0}Alternate".format(cls.__name__),
1196
@alternate_dbus_interfaces({"se.recompile.Mandos":
1197
"se.bsnet.fukt.Mandos"})
754
1198
class ClientDBus(Client, DBusObjectWithProperties):
755
1199
"""A Client class using D-Bus
777
1220
("/clients/" + client_object_name))
778
1221
DBusObjectWithProperties.__init__(self, self.bus,
779
1222
self.dbus_object_path)
780
def _set_expires(self, value):
781
old_value = getattr(self, "_expires", None)
782
self._expires = value
783
if hasattr(self, "dbus_object_path") and old_value != value:
784
dbus_time = (self._datetime_to_dbus(self._expires,
786
self.PropertyChanged(dbus.String("Expires"),
788
expires = property(lambda self: self._expires, _set_expires)
791
def _get_approvals_pending(self):
792
return self._approvals_pending
793
def _set_approvals_pending(self, value):
794
old_value = self._approvals_pending
795
self._approvals_pending = value
797
if (hasattr(self, "dbus_object_path")
798
and bval is not bool(old_value)):
799
dbus_bool = dbus.Boolean(bval, variant_level=1)
800
self.PropertyChanged(dbus.String("ApprovalPending"),
803
approvals_pending = property(_get_approvals_pending,
804
_set_approvals_pending)
805
del _get_approvals_pending, _set_approvals_pending
808
def _datetime_to_dbus(dt, variant_level=0):
809
"""Convert a UTC datetime.datetime() to a D-Bus type."""
811
return dbus.String("", variant_level = variant_level)
812
return dbus.String(dt.isoformat(),
813
variant_level=variant_level)
816
oldstate = getattr(self, "enabled", False)
817
r = Client.enable(self)
818
if oldstate != self.enabled:
820
self.PropertyChanged(dbus.String("Enabled"),
821
dbus.Boolean(True, variant_level=1))
822
self.PropertyChanged(
823
dbus.String("LastEnabled"),
824
self._datetime_to_dbus(self.last_enabled,
828
def disable(self, quiet = False):
829
oldstate = getattr(self, "enabled", False)
830
r = Client.disable(self, quiet=quiet)
831
if not quiet and oldstate != self.enabled:
833
self.PropertyChanged(dbus.String("Enabled"),
834
dbus.Boolean(False, variant_level=1))
1224
def notifychangeproperty(transform_func,
1225
dbus_name, type_func=lambda x: x,
1227
""" Modify a variable so that it's a property which announces
1228
its changes to DBus.
1230
transform_fun: Function that takes a value and a variant_level
1231
and transforms it to a D-Bus type.
1232
dbus_name: D-Bus name of the variable
1233
type_func: Function that transform the value before sending it
1234
to the D-Bus. Default: no transform
1235
variant_level: D-Bus variant level. Default: 1
1237
attrname = "_{0}".format(dbus_name)
1238
def setter(self, value):
1239
if hasattr(self, "dbus_object_path"):
1240
if (not hasattr(self, attrname) or
1241
type_func(getattr(self, attrname, None))
1242
!= type_func(value)):
1243
dbus_value = transform_func(type_func(value),
1246
self.PropertyChanged(dbus.String(dbus_name),
1248
setattr(self, attrname, value)
1250
return property(lambda self: getattr(self, attrname), setter)
1252
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1253
approvals_pending = notifychangeproperty(dbus.Boolean,
1256
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1257
last_enabled = notifychangeproperty(datetime_to_dbus,
1259
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1260
type_func = lambda checker:
1261
checker is not None)
1262
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1264
last_checker_status = notifychangeproperty(dbus.Int16,
1265
"LastCheckerStatus")
1266
last_approval_request = notifychangeproperty(
1267
datetime_to_dbus, "LastApprovalRequest")
1268
approved_by_default = notifychangeproperty(dbus.Boolean,
1269
"ApprovedByDefault")
1270
approval_delay = notifychangeproperty(dbus.UInt64,
1273
timedelta_to_milliseconds)
1274
approval_duration = notifychangeproperty(
1275
dbus.UInt64, "ApprovalDuration",
1276
type_func = timedelta_to_milliseconds)
1277
host = notifychangeproperty(dbus.String, "Host")
1278
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1280
timedelta_to_milliseconds)
1281
extended_timeout = notifychangeproperty(
1282
dbus.UInt64, "ExtendedTimeout",
1283
type_func = timedelta_to_milliseconds)
1284
interval = notifychangeproperty(dbus.UInt64,
1287
timedelta_to_milliseconds)
1288
checker_command = notifychangeproperty(dbus.String, "Checker")
1290
del notifychangeproperty
837
1292
def __del__(self, *args, **kwargs):
1115
1530
def Timeout_dbus_property(self, value=None):
1116
1531
if value is None: # get
1117
1532
return dbus.UInt64(self.timeout_milliseconds())
1118
old_value = self.timeout
1533
old_timeout = self.timeout
1119
1534
self.timeout = datetime.timedelta(0, 0, 0, value)
1121
if old_value != self.timeout:
1122
self.PropertyChanged(dbus.String("Timeout"),
1123
dbus.UInt64(value, variant_level=1))
1124
if getattr(self, "disable_initiator_tag", None) is None:
1126
# Reschedule timeout
1127
gobject.source_remove(self.disable_initiator_tag)
1128
self.disable_initiator_tag = None
1130
time_to_die = (self.
1131
_timedelta_to_milliseconds((self
1136
if time_to_die <= 0:
1137
# The timeout has passed
1140
self.expires = (datetime.datetime.utcnow()
1141
+ datetime.timedelta(milliseconds = time_to_die))
1142
self.disable_initiator_tag = (gobject.timeout_add
1143
(time_to_die, self.disable))
1535
# Reschedule disabling
1537
now = datetime.datetime.utcnow()
1538
self.expires += self.timeout - old_timeout
1539
if self.expires <= now:
1540
# The timeout has passed
1543
if (getattr(self, "disable_initiator_tag", None)
1546
gobject.source_remove(self.disable_initiator_tag)
1547
self.disable_initiator_tag = (
1548
gobject.timeout_add(
1549
timedelta_to_milliseconds(self.expires - now),
1145
1552
# ExtendedTimeout - property
1146
1553
@dbus_service_property(_interface, signature="t",
1147
1554
access="readwrite")
1148
1555
def ExtendedTimeout_dbus_property(self, value=None):
1149
1556
if value is None: # get
1150
1557
return dbus.UInt64(self.extended_timeout_milliseconds())
1151
old_value = self.extended_timeout
1152
1558
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1154
if old_value != self.extended_timeout:
1155
self.PropertyChanged(dbus.String("ExtendedTimeout"),
1156
dbus.UInt64(value, variant_level=1))
1158
1560
# Interval - property
1159
1561
@dbus_service_property(_interface, signature="t",
1160
1562
access="readwrite")
1161
1563
def Interval_dbus_property(self, value=None):
1162
1564
if value is None: # get
1163
1565
return dbus.UInt64(self.interval_milliseconds())
1164
old_value = self.interval
1165
1566
self.interval = datetime.timedelta(0, 0, 0, value)
1167
if old_value != self.interval:
1168
self.PropertyChanged(dbus.String("Interval"),
1169
dbus.UInt64(value, variant_level=1))
1170
1567
if getattr(self, "checker_initiator_tag", None) is None:
1172
# Reschedule checker run
1173
gobject.source_remove(self.checker_initiator_tag)
1174
self.checker_initiator_tag = (gobject.timeout_add
1175
(value, self.start_checker))
1176
self.start_checker() # Start one now, too
1570
# Reschedule checker run
1571
gobject.source_remove(self.checker_initiator_tag)
1572
self.checker_initiator_tag = (gobject.timeout_add
1573
(value, self.start_checker))
1574
self.start_checker() # Start one now, too
1178
1576
# Checker - property
1179
1577
@dbus_service_property(_interface, signature="s",
1180
1578
access="readwrite")
1181
1579
def Checker_dbus_property(self, value=None):
1182
1580
if value is None: # get
1183
1581
return dbus.String(self.checker_command)
1184
old_value = self.checker_command
1185
self.checker_command = value
1187
if old_value != self.checker_command:
1188
self.PropertyChanged(dbus.String("Checker"),
1189
dbus.String(self.checker_command,
1582
self.checker_command = unicode(value)
1192
1584
# CheckerRunning - property
1193
1585
@dbus_service_property(_interface, signature="b",
1566
1999
def __init__(self, server_address, RequestHandlerClass,
1567
2000
interface=None, use_ipv6=True, clients=None,
1568
gnutls_priority=None, use_dbus=True):
2001
gnutls_priority=None, use_dbus=True, socketfd=None):
1569
2002
self.enabled = False
1570
2003
self.clients = clients
1571
2004
if self.clients is None:
1572
self.clients = set()
1573
2006
self.use_dbus = use_dbus
1574
2007
self.gnutls_priority = gnutls_priority
1575
2008
IPv6_TCPServer.__init__(self, server_address,
1576
2009
RequestHandlerClass,
1577
2010
interface = interface,
1578
use_ipv6 = use_ipv6)
2011
use_ipv6 = use_ipv6,
2012
socketfd = socketfd)
1579
2013
def server_activate(self):
1580
2014
if self.enabled:
1581
2015
return socketserver.TCPServer.server_activate(self)
1582
2017
def enable(self):
1583
2018
self.enabled = True
1584
def add_pipe(self, parent_pipe):
2020
def add_pipe(self, parent_pipe, proc):
1585
2021
# Call "handle_ipc" for both data and EOF events
1586
2022
gobject.io_add_watch(parent_pipe.fileno(),
1587
2023
gobject.IO_IN | gobject.IO_HUP,
1588
2024
functools.partial(self.handle_ipc,
1589
parent_pipe = parent_pipe))
1591
2029
def handle_ipc(self, source, condition, parent_pipe=None,
1592
client_object=None):
1594
gobject.IO_IN: "IN", # There is data to read.
1595
gobject.IO_OUT: "OUT", # Data can be written (without
1597
gobject.IO_PRI: "PRI", # There is urgent data to read.
1598
gobject.IO_ERR: "ERR", # Error condition.
1599
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1600
# broken, usually for pipes and
1603
conditions_string = ' | '.join(name
1605
condition_names.iteritems()
1606
if cond & condition)
1607
# error or the other end of multiprocessing.Pipe has closed
1608
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
2030
proc = None, client_object=None):
2031
# error, or the other end of multiprocessing.Pipe has closed
2032
if condition & (gobject.IO_ERR | gobject.IO_HUP):
2033
# Wait for other process to exit
1611
2037
# Read a request from the child
1923
2352
.gnutls_global_set_log_function(debug_gnutls))
1925
2354
# Redirect stdin so all checkers get /dev/null
1926
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2355
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1927
2356
os.dup2(null, sys.stdin.fileno())
1931
# No console logging
1932
logger.removeHandler(console)
1934
2360
# Need to fork before connecting to D-Bus
1936
2362
# Close all input and output, do double fork, etc.
2365
# multiprocessing will use threads, so before we use gobject we
2366
# need to inform gobject that threads will be used.
2367
gobject.threads_init()
1939
2369
global main_loop
1940
2370
# From the Avahi example code
1941
DBusGMainLoop(set_as_default=True )
2371
DBusGMainLoop(set_as_default=True)
1942
2372
main_loop = gobject.MainLoop()
1943
2373
bus = dbus.SystemBus()
1944
2374
# End of Avahi example code
1947
bus_name = dbus.service.BusName("se.bsnet.fukt.Mandos",
2377
bus_name = dbus.service.BusName("se.recompile.Mandos",
1948
2378
bus, do_not_queue=True)
2379
old_bus_name = (dbus.service.BusName
2380
("se.bsnet.fukt.Mandos", bus,
1949
2382
except dbus.exceptions.NameExistsException as e:
1950
logger.error(unicode(e) + ", disabling D-Bus")
2383
logger.error("Disabling D-Bus:", exc_info=e)
1951
2384
use_dbus = False
1952
2385
server_settings["use_dbus"] = False
1953
2386
tcp_server.use_dbus = False
1954
2387
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1955
service = AvahiService(name = server_settings["servicename"],
1956
servicetype = "_mandos._tcp",
1957
protocol = protocol, bus = bus)
2388
service = AvahiServiceToSyslog(name =
2389
server_settings["servicename"],
2390
servicetype = "_mandos._tcp",
2391
protocol = protocol, bus = bus)
1958
2392
if server_settings["interface"]:
1959
2393
service.interface = (if_nametoindex
1960
2394
(str(server_settings["interface"])))
1965
2399
client_class = Client
1967
2401
client_class = functools.partial(ClientDBus, bus = bus)
1968
def client_config_items(config, section):
1969
special_settings = {
1970
"approved_by_default":
1971
lambda: config.getboolean(section,
1972
"approved_by_default"),
1974
for name, value in config.items(section):
2403
client_settings = Client.config_parser(client_config)
2404
old_client_settings = {}
2407
# Get client data and settings from last running state.
2408
if server_settings["restore"]:
2410
with open(stored_state_path, "rb") as stored_state:
2411
clients_data, old_client_settings = (pickle.load
2413
os.remove(stored_state_path)
2414
except IOError as e:
2415
if e.errno == errno.ENOENT:
2416
logger.warning("Could not load persistent state: {0}"
2417
.format(os.strerror(e.errno)))
2419
logger.critical("Could not load persistent state:",
2422
except EOFError as e:
2423
logger.warning("Could not load persistent state: "
2424
"EOFError:", exc_info=e)
2426
with PGPEngine() as pgp:
2427
for client_name, client in clients_data.iteritems():
2428
# Decide which value to use after restoring saved state.
2429
# We have three different values: Old config file,
2430
# new config file, and saved state.
2431
# New config value takes precedence if it differs from old
2432
# config value, otherwise use saved state.
2433
for name, value in client_settings[client_name].items():
2435
# For each value in new config, check if it
2436
# differs from the old config value (Except for
2437
# the "secret" attribute)
2438
if (name != "secret" and
2439
value != old_client_settings[client_name]
2441
client[name] = value
2445
# Clients who has passed its expire date can still be
2446
# enabled if its last checker was successful. Clients
2447
# whose checker succeeded before we stored its state is
2448
# assumed to have successfully run all checkers during
2450
if client["enabled"]:
2451
if datetime.datetime.utcnow() >= client["expires"]:
2452
if not client["last_checked_ok"]:
2454
"disabling client {0} - Client never "
2455
"performed a successful checker"
2456
.format(client_name))
2457
client["enabled"] = False
2458
elif client["last_checker_status"] != 0:
2460
"disabling client {0} - Client "
2461
"last checker failed with error code {1}"
2462
.format(client_name,
2463
client["last_checker_status"]))
2464
client["enabled"] = False
2466
client["expires"] = (datetime.datetime
2468
+ client["timeout"])
2469
logger.debug("Last checker succeeded,"
2470
" keeping {0} enabled"
2471
.format(client_name))
1976
yield (name, special_settings[name]())
1980
tcp_server.clients.update(set(
1981
client_class(name = section,
1982
config= dict(client_config_items(
1983
client_config, section)))
1984
for section in client_config.sections()))
2473
client["secret"] = (
2474
pgp.decrypt(client["encrypted_secret"],
2475
client_settings[client_name]
2478
# If decryption fails, we use secret from new settings
2479
logger.debug("Failed to decrypt {0} old secret"
2480
.format(client_name))
2481
client["secret"] = (
2482
client_settings[client_name]["secret"])
2484
# Add/remove clients based on new changes made to config
2485
for client_name in (set(old_client_settings)
2486
- set(client_settings)):
2487
del clients_data[client_name]
2488
for client_name in (set(client_settings)
2489
- set(old_client_settings)):
2490
clients_data[client_name] = client_settings[client_name]
2492
# Create all client objects
2493
for client_name, client in clients_data.iteritems():
2494
tcp_server.clients[client_name] = client_class(
2495
name = client_name, settings = client)
1985
2497
if not tcp_server.clients:
1986
2498
logger.warning("No clients defined")
2063
2582
"Cleanup function; run on exit"
2064
2583
service.cleanup()
2585
multiprocessing.active_children()
2586
if not (tcp_server.clients or client_settings):
2589
# Store client before exiting. Secrets are encrypted with key
2590
# based on what config file has. If config file is
2591
# removed/edited, old secret will thus be unrecovable.
2593
with PGPEngine() as pgp:
2594
for client in tcp_server.clients.itervalues():
2595
key = client_settings[client.name]["secret"]
2596
client.encrypted_secret = pgp.encrypt(client.secret,
2600
# A list of attributes that can not be pickled
2602
exclude = set(("bus", "changedstate", "secret",
2604
for name, typ in (inspect.getmembers
2605
(dbus.service.Object)):
2608
client_dict["encrypted_secret"] = (client
2610
for attr in client.client_structure:
2611
if attr not in exclude:
2612
client_dict[attr] = getattr(client, attr)
2614
clients[client.name] = client_dict
2615
del client_settings[client.name]["secret"]
2618
with (tempfile.NamedTemporaryFile
2619
(mode='wb', suffix=".pickle", prefix='clients-',
2620
dir=os.path.dirname(stored_state_path),
2621
delete=False)) as stored_state:
2622
pickle.dump((clients, client_settings), stored_state)
2623
tempname=stored_state.name
2624
os.rename(tempname, stored_state_path)
2625
except (IOError, OSError) as e:
2631
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
2632
logger.warning("Could not save persistent state: {0}"
2633
.format(os.strerror(e.errno)))
2635
logger.warning("Could not save persistent state:",
2639
# Delete all clients, and settings from config
2066
2640
while tcp_server.clients:
2067
client = tcp_server.clients.pop()
2641
name, client = tcp_server.clients.popitem()
2069
2643
client.remove_from_connection()
2070
client.disable_hook = None
2071
2644
# Don't signal anything except ClientRemoved
2072
2645
client.disable(quiet=True)
2074
2647
# Emit D-Bus signal
2075
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
2648
mandos_dbus_service.ClientRemoved(client
2651
client_settings.clear()
2078
2653
atexit.register(cleanup)
2080
for client in tcp_server.clients:
2655
for client in tcp_server.clients.itervalues():
2082
2657
# Emit D-Bus signal
2083
2658
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2659
# Need to initiate checking of clients
2661
client.init_checker()
2086
2663
tcp_server.enable()
2087
2664
tcp_server.server_activate()