88
81
except ImportError:
89
82
SO_BINDTODEVICE = None
92
stored_state_file = "clients.pickle"
94
logger = logging.getLogger()
87
#logger = logging.getLogger('mandos')
88
logger = logging.Logger('mandos')
95
89
syslogger = (logging.handlers.SysLogHandler
96
90
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
97
91
address = str("/dev/log")))
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
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)
214
103
class AvahiError(Exception):
215
104
def __init__(self, value, *args, **kwargs):
426
291
interval: datetime.timedelta(); How often to start a new checker
427
292
last_approval_request: datetime.datetime(); (UTC) or None
428
293
last_checked_ok: datetime.datetime(); (UTC) or None
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
294
last_enabled: datetime.datetime(); (UTC)
433
295
name: string; from the config file, used in log messages and
434
296
D-Bus identifiers
435
297
secret: bytestring; sent verbatim (over TLS) to client
436
298
timeout: datetime.timedelta(); How long from last_checked_ok
437
299
until this client is disabled
438
extended_timeout: extra long timeout when secret has been sent
439
300
runtime_expansions: Allowed attributes for runtime expansion.
440
expires: datetime.datetime(); time (UTC) when a client will be
444
303
runtime_expansions = ("approval_delay", "approval_duration",
445
"created", "enabled", "expires",
446
"fingerprint", "host", "interval",
447
"last_approval_request", "last_checked_ok",
304
"created", "enabled", "fingerprint",
305
"host", "interval", "last_checked_ok",
448
306
"last_enabled", "name", "timeout")
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",
309
def _timedelta_to_milliseconds(td):
310
"Convert a datetime.timedelta() to milliseconds"
311
return ((td.days * 24 * 60 * 60 * 1000)
312
+ (td.seconds * 1000)
313
+ (td.microseconds // 1000))
460
315
def timeout_milliseconds(self):
461
316
"Return the 'timeout' attribute in milliseconds"
462
return timedelta_to_milliseconds(self.timeout)
464
def extended_timeout_milliseconds(self):
465
"Return the 'extended_timeout' attribute in milliseconds"
466
return timedelta_to_milliseconds(self.extended_timeout)
317
return self._timedelta_to_milliseconds(self.timeout)
468
319
def interval_milliseconds(self):
469
320
"Return the 'interval' attribute in milliseconds"
470
return timedelta_to_milliseconds(self.interval)
321
return self._timedelta_to_milliseconds(self.interval)
472
323
def approval_delay_milliseconds(self):
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):
324
return self._timedelta_to_milliseconds(self.approval_delay)
326
def __init__(self, name = None, disable_hook=None, config=None):
327
"""Note: the 'checker' key in 'config' sets the
328
'checker_command' attribute and *not* the 'checker'
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
538
333
logger.debug("Creating client %r", self.name)
539
334
# Uppercase and remove spaces from fingerprint for later
540
335
# comparison purposes with return value from the fingerprint()
337
self.fingerprint = (config["fingerprint"].upper()
542
339
logger.debug(" Fingerprint: %s", self.fingerprint)
543
self.created = settings.get("created",
544
datetime.datetime.utcnow())
546
# attributes specific for this server instance
340
if "secret" in config:
341
self.secret = config["secret"].decode("base64")
342
elif "secfile" in config:
343
with open(os.path.expanduser(os.path.expandvars
344
(config["secfile"])),
346
self.secret = secfile.read()
348
raise TypeError("No secret or secfile for client %s"
350
self.host = config.get("host", "")
351
self.created = datetime.datetime.utcnow()
353
self.last_approval_request = None
354
self.last_enabled = None
355
self.last_checked_ok = None
356
self.timeout = string_to_delta(config["timeout"])
357
self.interval = string_to_delta(config["interval"])
358
self.disable_hook = disable_hook
547
359
self.checker = None
548
360
self.checker_initiator_tag = None
549
361
self.disable_initiator_tag = None
550
362
self.checker_callback_tag = None
363
self.checker_command = config["checker"]
551
364
self.current_checker_command = None
365
self.last_connect = None
366
self._approved = None
367
self.approved_by_default = config.get("approved_by_default",
553
369
self.approvals_pending = 0
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)
370
self.approval_delay = string_to_delta(
371
config["approval_delay"])
372
self.approval_duration = string_to_delta(
373
config["approval_duration"])
374
self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())
569
# Send notice to process children that client state has changed
570
376
def send_changedstate(self):
571
with self.changedstate:
572
self.changedstate.notify_all()
377
self.changedstate.acquire()
378
self.changedstate.notify_all()
379
self.changedstate.release()
574
381
def enable(self):
575
382
"""Start this client's checker and timeout hooks"""
576
383
if getattr(self, "enabled", False):
577
384
# Already enabled
579
self.expires = datetime.datetime.utcnow() + self.timeout
386
self.send_changedstate()
581
387
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):
609
388
# Schedule a new checker to be started an 'interval' from now,
610
389
# and every interval from then on.
611
if self.checker_initiator_tag is not None:
612
gobject.source_remove(self.checker_initiator_tag)
613
390
self.checker_initiator_tag = (gobject.timeout_add
614
391
(self.interval_milliseconds(),
615
392
self.start_checker))
616
393
# Schedule a disable() when 'timeout' has passed
617
if self.disable_initiator_tag is not None:
618
gobject.source_remove(self.disable_initiator_tag)
619
394
self.disable_initiator_tag = (gobject.timeout_add
620
395
(self.timeout_milliseconds(),
622
398
# Also start a new checker *right now*.
623
399
self.start_checker()
401
def disable(self, quiet=True):
402
"""Disable this client."""
403
if not getattr(self, "enabled", False):
406
self.send_changedstate()
408
logger.info("Disabling client %s", self.name)
409
if getattr(self, "disable_initiator_tag", False):
410
gobject.source_remove(self.disable_initiator_tag)
411
self.disable_initiator_tag = None
412
if getattr(self, "checker_initiator_tag", False):
413
gobject.source_remove(self.checker_initiator_tag)
414
self.checker_initiator_tag = None
416
if self.disable_hook:
417
self.disable_hook(self)
419
# Do not run this again if called by a gobject.timeout_add
423
self.disable_hook = None
625
426
def checker_callback(self, pid, condition, command):
626
427
"""The checker has completed, so take appropriate actions."""
627
428
self.checker_callback_tag = None
628
429
self.checker = None
629
430
if os.WIFEXITED(condition):
630
self.last_checker_status = os.WEXITSTATUS(condition)
631
if self.last_checker_status == 0:
431
exitstatus = os.WEXITSTATUS(condition)
632
433
logger.info("Checker for %(name)s succeeded",
634
435
self.checked_ok()
837
600
class DBusObjectWithProperties(dbus.service.Object):
838
601
"""A D-Bus object with properties.
840
603
Classes inheriting from this can use the dbus_service_property
841
604
decorator to expose methods as D-Bus properties. It exposes the
842
605
standard Get(), Set(), and GetAll() methods on the D-Bus.
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),
609
def _is_dbus_property(obj):
610
return getattr(obj, "_dbus_is_property", False)
855
def _get_all_dbus_things(self, thing):
612
def _get_all_dbus_properties(self):
856
613
"""Returns a generator of (name, attribute) pairs
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)))
615
return ((prop._dbus_name, prop)
617
inspect.getmembers(self, self._is_dbus_property))
866
619
def _get_dbus_property(self, interface_name, property_name):
867
620
"""Returns a bound method if one exists which is a D-Bus
868
621
property with the specified name and 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)
623
for name in (property_name,
624
property_name + "_dbus_property"):
625
prop = getattr(self, name, None)
627
or not self._is_dbus_property(prop)
628
or prop._dbus_name != property_name
629
or (interface_name and prop._dbus_interface
630
and interface_name != prop._dbus_interface)):
878
633
# No such property
879
634
raise DBusPropertyNotFound(self.dbus_object_path + ":"
880
635
+ interface_name + "."
1012
733
except (AttributeError, xml.dom.DOMException,
1013
734
xml.parsers.expat.ExpatError) as error:
1014
735
logger.error("Failed to override Introspection method",
1016
737
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"})
1198
740
class ClientDBus(Client, DBusObjectWithProperties):
1199
741
"""A Client class using D-Bus
1220
763
("/clients/" + client_object_name))
1221
764
DBusObjectWithProperties.__init__(self, self.bus,
1222
765
self.dbus_object_path)
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
767
def _get_approvals_pending(self):
768
return self._approvals_pending
769
def _set_approvals_pending(self, value):
770
old_value = self._approvals_pending
771
self._approvals_pending = value
773
if (hasattr(self, "dbus_object_path")
774
and bval is not bool(old_value)):
775
dbus_bool = dbus.Boolean(bval, variant_level=1)
776
self.PropertyChanged(dbus.String("ApprovalPending"),
779
approvals_pending = property(_get_approvals_pending,
780
_set_approvals_pending)
781
del _get_approvals_pending, _set_approvals_pending
784
def _datetime_to_dbus(dt, variant_level=0):
785
"""Convert a UTC datetime.datetime() to a D-Bus type."""
786
return dbus.String(dt.isoformat(),
787
variant_level=variant_level)
790
oldstate = getattr(self, "enabled", False)
791
r = Client.enable(self)
792
if oldstate != self.enabled:
794
self.PropertyChanged(dbus.String("Enabled"),
795
dbus.Boolean(True, variant_level=1))
796
self.PropertyChanged(
797
dbus.String("LastEnabled"),
798
self._datetime_to_dbus(self.last_enabled,
802
def disable(self, quiet = False):
803
oldstate = getattr(self, "enabled", False)
804
r = Client.disable(self, quiet=quiet)
805
if not quiet and oldstate != self.enabled:
807
self.PropertyChanged(dbus.String("Enabled"),
808
dbus.Boolean(False, variant_level=1))
1292
811
def __del__(self, *args, **kwargs):
1996
1514
def __init__(self, server_address, RequestHandlerClass,
1997
1515
interface=None, use_ipv6=True, clients=None,
1998
gnutls_priority=None, use_dbus=True, socketfd=None):
1516
gnutls_priority=None, use_dbus=True):
1999
1517
self.enabled = False
2000
1518
self.clients = clients
2001
1519
if self.clients is None:
1520
self.clients = set()
2003
1521
self.use_dbus = use_dbus
2004
1522
self.gnutls_priority = gnutls_priority
2005
1523
IPv6_TCPServer.__init__(self, server_address,
2006
1524
RequestHandlerClass,
2007
1525
interface = interface,
2008
use_ipv6 = use_ipv6,
2009
socketfd = socketfd)
1526
use_ipv6 = use_ipv6)
2010
1527
def server_activate(self):
2011
1528
if self.enabled:
2012
1529
return socketserver.TCPServer.server_activate(self)
2014
1530
def enable(self):
2015
1531
self.enabled = True
2017
def add_pipe(self, parent_pipe, proc):
1532
def add_pipe(self, parent_pipe):
2018
1533
# Call "handle_ipc" for both data and EOF events
2019
1534
gobject.io_add_watch(parent_pipe.fileno(),
2020
1535
gobject.IO_IN | gobject.IO_HUP,
2021
1536
functools.partial(self.handle_ipc,
1537
parent_pipe = parent_pipe))
2026
1539
def handle_ipc(self, source, condition, parent_pipe=None,
2027
proc = None, client_object=None):
2028
# error, or the other end of multiprocessing.Pipe has closed
2029
if condition & (gobject.IO_ERR | gobject.IO_HUP):
2030
# Wait for other process to exit
1540
client_object=None):
1542
gobject.IO_IN: "IN", # There is data to read.
1543
gobject.IO_OUT: "OUT", # Data can be written (without
1545
gobject.IO_PRI: "PRI", # There is urgent data to read.
1546
gobject.IO_ERR: "ERR", # Error condition.
1547
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1548
# broken, usually for pipes and
1551
conditions_string = ' | '.join(name
1553
condition_names.iteritems()
1554
if cond & condition)
1555
# error or the other end of multiprocessing.Pipe has closed
1556
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
2034
1559
# Read a request from the child
2357
1870
.gnutls_global_set_log_function(debug_gnutls))
2359
1872
# Redirect stdin so all checkers get /dev/null
2360
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1873
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2361
1874
os.dup2(null, sys.stdin.fileno())
1878
# No console logging
1879
logger.removeHandler(console)
2365
1881
# Need to fork before connecting to D-Bus
2367
1883
# Close all input and output, do double fork, etc.
2370
# multiprocessing will use threads, so before we use gobject we
2371
# need to inform gobject that threads will be used.
2372
gobject.threads_init()
2374
1886
global main_loop
2375
1887
# From the Avahi example code
2376
DBusGMainLoop(set_as_default=True)
1888
DBusGMainLoop(set_as_default=True )
2377
1889
main_loop = gobject.MainLoop()
2378
1890
bus = dbus.SystemBus()
2379
1891
# End of Avahi example code
2382
bus_name = dbus.service.BusName("se.recompile.Mandos",
1894
bus_name = dbus.service.BusName("se.bsnet.fukt.Mandos",
2383
1895
bus, do_not_queue=True)
2384
old_bus_name = (dbus.service.BusName
2385
("se.bsnet.fukt.Mandos", bus,
2387
1896
except dbus.exceptions.NameExistsException as e:
2388
logger.error("Disabling D-Bus:", exc_info=e)
1897
logger.error(unicode(e) + ", disabling D-Bus")
2389
1898
use_dbus = False
2390
1899
server_settings["use_dbus"] = False
2391
1900
tcp_server.use_dbus = False
2392
1901
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2393
service = AvahiServiceToSyslog(name =
2394
server_settings["servicename"],
2395
servicetype = "_mandos._tcp",
2396
protocol = protocol, bus = bus)
1902
service = AvahiService(name = server_settings["servicename"],
1903
servicetype = "_mandos._tcp",
1904
protocol = protocol, bus = bus)
2397
1905
if server_settings["interface"]:
2398
1906
service.interface = (if_nametoindex
2399
1907
(str(server_settings["interface"])))
2404
1912
client_class = Client
2406
1914
client_class = functools.partial(ClientDBus, bus = bus)
2408
client_settings = Client.config_parser(client_config)
2409
old_client_settings = {}
2412
# Get client data and settings from last running state.
2413
if server_settings["restore"]:
2415
with open(stored_state_path, "rb") as stored_state:
2416
clients_data, old_client_settings = (pickle.load
2418
os.remove(stored_state_path)
2419
except IOError as e:
2420
if e.errno == errno.ENOENT:
2421
logger.warning("Could not load persistent state: {0}"
2422
.format(os.strerror(e.errno)))
2424
logger.critical("Could not load persistent state:",
2427
except EOFError as e:
2428
logger.warning("Could not load persistent state: "
2429
"EOFError:", exc_info=e)
2431
with PGPEngine() as pgp:
2432
for client_name, client in clients_data.iteritems():
2433
# Decide which value to use after restoring saved state.
2434
# We have three different values: Old config file,
2435
# new config file, and saved state.
2436
# New config value takes precedence if it differs from old
2437
# config value, otherwise use saved state.
2438
for name, value in client_settings[client_name].items():
2440
# For each value in new config, check if it
2441
# differs from the old config value (Except for
2442
# the "secret" attribute)
2443
if (name != "secret" and
2444
value != old_client_settings[client_name]
2446
client[name] = value
2450
# Clients who has passed its expire date can still be
2451
# enabled if its last checker was successful. Clients
2452
# whose checker succeeded before we stored its state is
2453
# assumed to have successfully run all checkers during
2455
if client["enabled"]:
2456
if datetime.datetime.utcnow() >= client["expires"]:
2457
if not client["last_checked_ok"]:
2459
"disabling client {0} - Client never "
2460
"performed a successful checker"
2461
.format(client_name))
2462
client["enabled"] = False
2463
elif client["last_checker_status"] != 0:
2465
"disabling client {0} - Client "
2466
"last checker failed with error code {1}"
2467
.format(client_name,
2468
client["last_checker_status"]))
2469
client["enabled"] = False
2471
client["expires"] = (datetime.datetime
2473
+ client["timeout"])
2474
logger.debug("Last checker succeeded,"
2475
" keeping {0} enabled"
2476
.format(client_name))
1915
def client_config_items(config, section):
1916
special_settings = {
1917
"approved_by_default":
1918
lambda: config.getboolean(section,
1919
"approved_by_default"),
1921
for name, value in config.items(section):
2478
client["secret"] = (
2479
pgp.decrypt(client["encrypted_secret"],
2480
client_settings[client_name]
2483
# If decryption fails, we use secret from new settings
2484
logger.debug("Failed to decrypt {0} old secret"
2485
.format(client_name))
2486
client["secret"] = (
2487
client_settings[client_name]["secret"])
2489
# Add/remove clients based on new changes made to config
2490
for client_name in (set(old_client_settings)
2491
- set(client_settings)):
2492
del clients_data[client_name]
2493
for client_name in (set(client_settings)
2494
- set(old_client_settings)):
2495
clients_data[client_name] = client_settings[client_name]
2497
# Create all client objects
2498
for client_name, client in clients_data.iteritems():
2499
tcp_server.clients[client_name] = client_class(
2500
name = client_name, settings = client)
1923
yield (name, special_settings[name]())
1927
tcp_server.clients.update(set(
1928
client_class(name = section,
1929
config= dict(client_config_items(
1930
client_config, section)))
1931
for section in client_config.sections()))
2502
1932
if not tcp_server.clients:
2503
1933
logger.warning("No clients defined")
2506
if pidfile is not None:
2510
pidfile.write(str(pid) + "\n".encode("utf-8"))
2512
logger.error("Could not write to file %r with PID %d",
1939
pidfile.write(str(pid) + "\n".encode("utf-8"))
1942
logger.error("Could not write to file %r with PID %d",
1945
# "pidfile" was never created
2515
1947
del pidfilename
1949
signal.signal(signal.SIGINT, signal.SIG_IGN)
2517
1951
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2518
1952
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2521
@alternate_dbus_interfaces({"se.recompile.Mandos":
2522
"se.bsnet.fukt.Mandos"})
2523
class MandosDBusService(DBusObjectWithProperties):
1955
class MandosDBusService(dbus.service.Object):
2524
1956
"""A D-Bus proxy object"""
2525
1957
def __init__(self):
2526
1958
dbus.service.Object.__init__(self, bus, "/")
2527
_interface = "se.recompile.Mandos"
2529
@dbus_interface_annotations(_interface)
2531
return { "org.freedesktop.DBus.Property"
2532
".EmitsChangedSignal":
1959
_interface = "se.bsnet.fukt.Mandos"
2535
1961
@dbus.service.signal(_interface, signature="o")
2536
1962
def ClientAdded(self, objpath):
2585
2010
"Cleanup function; run on exit"
2586
2011
service.cleanup()
2588
multiprocessing.active_children()
2589
if not (tcp_server.clients or client_settings):
2592
# Store client before exiting. Secrets are encrypted with key
2593
# based on what config file has. If config file is
2594
# removed/edited, old secret will thus be unrecovable.
2596
with PGPEngine() as pgp:
2597
for client in tcp_server.clients.itervalues():
2598
key = client_settings[client.name]["secret"]
2599
client.encrypted_secret = pgp.encrypt(client.secret,
2603
# A list of attributes that can not be pickled
2605
exclude = set(("bus", "changedstate", "secret",
2607
for name, typ in (inspect.getmembers
2608
(dbus.service.Object)):
2611
client_dict["encrypted_secret"] = (client
2613
for attr in client.client_structure:
2614
if attr not in exclude:
2615
client_dict[attr] = getattr(client, attr)
2617
clients[client.name] = client_dict
2618
del client_settings[client.name]["secret"]
2621
with (tempfile.NamedTemporaryFile
2622
(mode='wb', suffix=".pickle", prefix='clients-',
2623
dir=os.path.dirname(stored_state_path),
2624
delete=False)) as stored_state:
2625
pickle.dump((clients, client_settings), stored_state)
2626
tempname=stored_state.name
2627
os.rename(tempname, stored_state_path)
2628
except (IOError, OSError) as e:
2634
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
2635
logger.warning("Could not save persistent state: {0}"
2636
.format(os.strerror(e.errno)))
2638
logger.warning("Could not save persistent state:",
2642
# Delete all clients, and settings from config
2643
2013
while tcp_server.clients:
2644
name, client = tcp_server.clients.popitem()
2014
client = tcp_server.clients.pop()
2646
2016
client.remove_from_connection()
2017
client.disable_hook = None
2647
2018
# Don't signal anything except ClientRemoved
2648
2019
client.disable(quiet=True)
2650
2021
# Emit D-Bus signal
2651
mandos_dbus_service.ClientRemoved(client
2022
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
2654
client_settings.clear()
2656
2025
atexit.register(cleanup)
2658
for client in tcp_server.clients.itervalues():
2027
for client in tcp_server.clients:
2660
2029
# Emit D-Bus signal
2661
2030
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2662
# Need to initiate checking of clients
2664
client.init_checker()
2666
2033
tcp_server.enable()
2667
2034
tcp_server.server_activate()