87
73
from IN import SO_BINDTODEVICE
88
74
except ImportError:
89
SO_BINDTODEVICE = None
91
if sys.version_info.major == 2:
95
stored_state_file = "clients.pickle"
97
logger = logging.getLogger()
101
if_nametoindex = (ctypes.cdll.LoadLibrary
102
(ctypes.util.find_library("c"))
104
except (OSError, AttributeError):
105
def if_nametoindex(interface):
106
"Get an interface index the hard way, i.e. using fcntl()"
107
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
108
with contextlib.closing(socket.socket()) as s:
109
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
110
struct.pack(b"16s16x", interface))
111
interface_index = struct.unpack("I", ifreq[16:20])[0]
112
return interface_index
115
def initlogger(debug, level=logging.WARNING):
116
"""init logger and add loglevel"""
119
syslogger = (logging.handlers.SysLogHandler
121
logging.handlers.SysLogHandler.LOG_DAEMON,
122
address = "/dev/log"))
123
syslogger.setFormatter(logging.Formatter
124
('Mandos [%(process)d]: %(levelname)s:'
126
logger.addHandler(syslogger)
129
console = logging.StreamHandler()
130
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
134
logger.addHandler(console)
135
logger.setLevel(level)
138
class PGPError(Exception):
139
"""Exception if encryption/decryption fails"""
143
class PGPEngine(object):
144
"""A simple class for OpenPGP symmetric encryption & decryption"""
146
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
147
self.gnupgargs = ['--batch',
148
'--home', self.tempdir,
156
def __exit__(self, exc_type, exc_value, traceback):
164
if self.tempdir is not None:
165
# Delete contents of tempdir
166
for root, dirs, files in os.walk(self.tempdir,
168
for filename in files:
169
os.remove(os.path.join(root, filename))
171
os.rmdir(os.path.join(root, dirname))
173
os.rmdir(self.tempdir)
176
def password_encode(self, password):
177
# Passphrase can not be empty and can not contain newlines or
178
# NUL bytes. So we prefix it and hex encode it.
179
encoded = b"mandos" + binascii.hexlify(password)
180
if len(encoded) > 2048:
181
# GnuPG can't handle long passwords, so encode differently
182
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
183
.replace(b"\n", b"\\n")
184
.replace(b"\0", b"\\x00"))
187
def encrypt(self, data, password):
188
passphrase = self.password_encode(password)
189
with tempfile.NamedTemporaryFile(dir=self.tempdir
191
passfile.write(passphrase)
193
proc = subprocess.Popen(['gpg', '--symmetric',
197
stdin = subprocess.PIPE,
198
stdout = subprocess.PIPE,
199
stderr = subprocess.PIPE)
200
ciphertext, err = proc.communicate(input = data)
201
if proc.returncode != 0:
205
def decrypt(self, data, password):
206
passphrase = self.password_encode(password)
207
with tempfile.NamedTemporaryFile(dir = self.tempdir
209
passfile.write(passphrase)
211
proc = subprocess.Popen(['gpg', '--decrypt',
215
stdin = subprocess.PIPE,
216
stdout = subprocess.PIPE,
217
stderr = subprocess.PIPE)
218
decrypted_plaintext, err = proc.communicate(input
220
if proc.returncode != 0:
222
return decrypted_plaintext
75
# From /usr/include/asm/socket.h
81
logger = logging.Logger('mandos')
82
syslogger = (logging.handlers.SysLogHandler
83
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
84
address = "/dev/log"))
85
syslogger.setFormatter(logging.Formatter
86
('Mandos [%(process)d]: %(levelname)s:'
88
logger.addHandler(syslogger)
90
console = logging.StreamHandler()
91
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
92
' %(levelname)s: %(message)s'))
93
logger.addHandler(console)
225
95
class AvahiError(Exception):
226
96
def __init__(self, value, *args, **kwargs):
227
97
self.value = value
228
return super(AvahiError, self).__init__(value, *args,
98
super(AvahiError, self).__init__(value, *args, **kwargs)
99
def __unicode__(self):
100
return unicode(repr(self.value))
231
102
class AvahiServiceError(AvahiError):
270
137
self.rename_count = 0
271
138
self.max_renames = max_renames
272
139
self.protocol = protocol
273
self.group = None # our entry group
276
self.entry_group_state_changed_match = None
278
def rename(self, remove=True):
279
141
"""Derived from the Avahi example code"""
280
142
if self.rename_count >= self.max_renames:
281
logger.critical("No suitable Zeroconf service name found"
282
" after %i retries, exiting.",
143
logger.critical(u"No suitable Zeroconf service name found"
144
u" after %i retries, exiting.",
283
145
self.rename_count)
284
raise AvahiServiceError("Too many renames")
285
self.name = str(self.server
286
.GetAlternativeServiceName(self.name))
146
raise AvahiServiceError(u"Too many renames")
147
self.name = server.GetAlternativeServiceName(self.name)
148
logger.info(u"Changing Zeroconf service name to %r ...",
150
syslogger.setFormatter(logging.Formatter
151
('Mandos (%s) [%%(process)d]:'
152
' %%(levelname)s: %%(message)s'
287
156
self.rename_count += 1
288
logger.info("Changing Zeroconf service name to %r ...",
294
except dbus.exceptions.DBusException as error:
295
if (error.get_dbus_name()
296
== "org.freedesktop.Avahi.CollisionError"):
297
logger.info("Local Zeroconf service name collision.")
298
return self.rename(remove=False)
300
logger.critical("D-Bus Exception", exc_info=error)
304
157
def remove(self):
305
158
"""Derived from the Avahi example code"""
306
if self.entry_group_state_changed_match is not None:
307
self.entry_group_state_changed_match.remove()
308
self.entry_group_state_changed_match = None
309
if self.group is not None:
159
if group is not None:
313
162
"""Derived from the Avahi example code"""
315
if self.group is None:
316
self.group = dbus.Interface(
317
self.bus.get_object(avahi.DBUS_NAME,
318
self.server.EntryGroupNew()),
319
avahi.DBUS_INTERFACE_ENTRY_GROUP)
320
self.entry_group_state_changed_match = (
321
self.group.connect_to_signal(
322
'StateChanged', self.entry_group_state_changed))
323
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
324
self.name, self.type)
325
self.group.AddService(
328
dbus.UInt32(0), # flags
329
self.name, self.type,
330
self.domain, self.host,
331
dbus.UInt16(self.port),
332
avahi.string_array_to_txt_array(self.TXT))
335
def entry_group_state_changed(self, state, error):
336
"""Derived from the Avahi example code"""
337
logger.debug("Avahi entry group state change: %i", state)
339
if state == avahi.ENTRY_GROUP_ESTABLISHED:
340
logger.debug("Zeroconf service established.")
341
elif state == avahi.ENTRY_GROUP_COLLISION:
342
logger.info("Zeroconf service name collision.")
344
elif state == avahi.ENTRY_GROUP_FAILURE:
345
logger.critical("Avahi: Error in group state changed %s",
347
raise AvahiGroupError("State changed: {!s}"
351
"""Derived from the Avahi example code"""
352
if self.group is not None:
355
except (dbus.exceptions.UnknownMethodException,
356
dbus.exceptions.DBusException):
361
def server_state_changed(self, state, error=None):
362
"""Derived from the Avahi example code"""
363
logger.debug("Avahi server state change: %i", state)
364
bad_states = { avahi.SERVER_INVALID:
365
"Zeroconf server invalid",
366
avahi.SERVER_REGISTERING: None,
367
avahi.SERVER_COLLISION:
368
"Zeroconf server name collision",
369
avahi.SERVER_FAILURE:
370
"Zeroconf server failure" }
371
if state in bad_states:
372
if bad_states[state] is not None:
374
logger.error(bad_states[state])
376
logger.error(bad_states[state] + ": %r", error)
378
elif state == avahi.SERVER_RUNNING:
382
logger.debug("Unknown state: %r", state)
384
logger.debug("Unknown state: %r: %r", state, error)
387
"""Derived from the Avahi example code"""
388
if self.server is None:
389
self.server = dbus.Interface(
390
self.bus.get_object(avahi.DBUS_NAME,
391
avahi.DBUS_PATH_SERVER,
392
follow_name_owner_changes=True),
393
avahi.DBUS_INTERFACE_SERVER)
394
self.server.connect_to_signal("StateChanged",
395
self.server_state_changed)
396
self.server_state_changed(self.server.GetState())
399
class AvahiServiceToSyslog(AvahiService):
400
def rename(self, *args, **kwargs):
401
"""Add the new name to the syslog messages"""
402
ret = AvahiService.rename(self, *args, **kwargs)
403
syslogger.setFormatter(logging.Formatter
404
('Mandos ({}) [%(process)d]:'
405
' %(levelname)s: %(message)s'
165
group = dbus.Interface(bus.get_object
167
server.EntryGroupNew()),
168
avahi.DBUS_INTERFACE_ENTRY_GROUP)
169
group.connect_to_signal('StateChanged',
170
entry_group_state_changed)
171
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
172
service.name, service.type)
174
self.interface, # interface
175
self.protocol, # protocol
176
dbus.UInt32(0), # flags
177
self.name, self.type,
178
self.domain, self.host,
179
dbus.UInt16(self.port),
180
avahi.string_array_to_txt_array(self.TXT))
183
# From the Avahi example code:
184
group = None # our entry group
185
# End of Avahi example code
188
def _datetime_to_dbus(dt, variant_level=0):
189
"""Convert a UTC datetime.datetime() to a D-Bus type."""
190
return dbus.String(dt.isoformat(), variant_level=variant_level)
410
193
class Client(object):
411
194
"""A representation of a client host served by this server.
414
approved: bool(); 'None' if not yet approved/disapproved
415
approval_delay: datetime.timedelta(); Time to wait for approval
416
approval_duration: datetime.timedelta(); Duration of one approval
197
name: string; from the config file, used in log messages and
199
fingerprint: string (40 or 32 hexadecimal digits); used to
200
uniquely identify the client
201
secret: bytestring; sent verbatim (over TLS) to client
202
host: string; available for use by the checker command
203
created: datetime.datetime(); (UTC) object creation
204
last_enabled: datetime.datetime(); (UTC)
206
last_checked_ok: datetime.datetime(); (UTC) or None
207
timeout: datetime.timedelta(); How long from last_checked_ok
208
until this client is invalid
209
interval: datetime.timedelta(); How often to start a new checker
210
disable_hook: If set, called by disable() as disable_hook(self)
417
211
checker: subprocess.Popen(); a running checker process used
418
212
to see if the client lives.
419
213
'None' if no process is running.
420
checker_callback_tag: a gobject event source tag, or None
421
checker_command: string; External command which is run to check
422
if client lives. %() expansions are done at
214
checker_initiator_tag: a gobject event source tag, or None
215
disable_initiator_tag: - '' -
216
checker_callback_tag: - '' -
217
checker_command: string; External command which is run to check if
218
client lives. %() expansions are done at
423
219
runtime with vars(self) as dict, so that for
424
220
instance %(name)s can be used in the command.
425
checker_initiator_tag: a gobject event source tag, or None
426
created: datetime.datetime(); (UTC) object creation
427
client_structure: Object describing what attributes a client has
428
and is used for storing the client at exit
429
221
current_checker_command: string; current running checker_command
430
disable_initiator_tag: a gobject event source tag, or None
432
fingerprint: string (40 or 32 hexadecimal digits); used to
433
uniquely identify the client
434
host: string; available for use by the checker command
435
interval: datetime.timedelta(); How often to start a new checker
436
last_approval_request: datetime.datetime(); (UTC) or None
437
last_checked_ok: datetime.datetime(); (UTC) or None
438
last_checker_status: integer between 0 and 255 reflecting exit
439
status of last checker. -1 reflects crashed
440
checker, -2 means no checker completed yet.
441
last_enabled: datetime.datetime(); (UTC) or None
442
name: string; from the config file, used in log messages and
444
secret: bytestring; sent verbatim (over TLS) to client
445
timeout: datetime.timedelta(); How long from last_checked_ok
446
until this client is disabled
447
extended_timeout: extra long timeout when secret has been sent
448
runtime_expansions: Allowed attributes for runtime expansion.
449
expires: datetime.datetime(); time (UTC) when a client will be
451
server_settings: The server_settings dict from main()
454
runtime_expansions = ("approval_delay", "approval_duration",
455
"created", "enabled", "expires",
456
"fingerprint", "host", "interval",
457
"last_approval_request", "last_checked_ok",
458
"last_enabled", "name", "timeout")
459
client_defaults = { "timeout": "PT5M",
460
"extended_timeout": "PT15M",
462
"checker": "fping -q -- %%(host)s",
464
"approval_delay": "PT0S",
465
"approval_duration": "PT1S",
466
"approved_by_default": "True",
471
def config_parser(config):
472
"""Construct a new dict of client settings of this form:
473
{ client_name: {setting_name: value, ...}, ...}
474
with exceptions for any special settings as defined above.
475
NOTE: Must be a pure function. Must return the same result
476
value given the same arguments.
479
for client_name in config.sections():
480
section = dict(config.items(client_name))
481
client = settings[client_name] = {}
483
client["host"] = section["host"]
484
# Reformat values from string types to Python types
485
client["approved_by_default"] = config.getboolean(
486
client_name, "approved_by_default")
487
client["enabled"] = config.getboolean(client_name,
490
# Uppercase and remove spaces from fingerprint for later
491
# comparison purposes with return value from the
492
# fingerprint() function
493
client["fingerprint"] = (section["fingerprint"].upper()
495
if "secret" in section:
496
client["secret"] = section["secret"].decode("base64")
497
elif "secfile" in section:
498
with open(os.path.expanduser(os.path.expandvars
499
(section["secfile"])),
501
client["secret"] = secfile.read()
503
raise TypeError("No secret or secfile for section {}"
505
client["timeout"] = string_to_delta(section["timeout"])
506
client["extended_timeout"] = string_to_delta(
507
section["extended_timeout"])
508
client["interval"] = string_to_delta(section["interval"])
509
client["approval_delay"] = string_to_delta(
510
section["approval_delay"])
511
client["approval_duration"] = string_to_delta(
512
section["approval_duration"])
513
client["checker_command"] = section["checker"]
514
client["last_approval_request"] = None
515
client["last_checked_ok"] = None
516
client["last_checker_status"] = -2
520
def __init__(self, settings, name = None, server_settings=None):
223
def timeout_milliseconds(self):
224
"Return the 'timeout' attribute in milliseconds"
225
return ((self.timeout.days * 24 * 60 * 60 * 1000)
226
+ (self.timeout.seconds * 1000)
227
+ (self.timeout.microseconds // 1000))
229
def interval_milliseconds(self):
230
"Return the 'interval' attribute in milliseconds"
231
return ((self.interval.days * 24 * 60 * 60 * 1000)
232
+ (self.interval.seconds * 1000)
233
+ (self.interval.microseconds // 1000))
235
def __init__(self, name = None, disable_hook=None, config=None):
236
"""Note: the 'checker' key in 'config' sets the
237
'checker_command' attribute and *not* the 'checker'
522
if server_settings is None:
524
self.server_settings = server_settings
525
# adding all client settings
526
for setting, value in settings.items():
527
setattr(self, setting, value)
530
if not hasattr(self, "last_enabled"):
531
self.last_enabled = datetime.datetime.utcnow()
532
if not hasattr(self, "expires"):
533
self.expires = (datetime.datetime.utcnow()
242
logger.debug(u"Creating client %r", self.name)
243
# Uppercase and remove spaces from fingerprint for later
244
# comparison purposes with return value from the fingerprint()
246
self.fingerprint = (config["fingerprint"].upper()
248
logger.debug(u" Fingerprint: %s", self.fingerprint)
249
if "secret" in config:
250
self.secret = config["secret"].decode(u"base64")
251
elif "secfile" in config:
252
with closing(open(os.path.expanduser
254
(config["secfile"])))) as secfile:
255
self.secret = secfile.read()
536
self.last_enabled = None
539
logger.debug("Creating client %r", self.name)
540
logger.debug(" Fingerprint: %s", self.fingerprint)
541
self.created = settings.get("created",
542
datetime.datetime.utcnow())
544
# attributes specific for this server instance
257
raise TypeError(u"No secret or secfile for client %s"
259
self.host = config.get("host", "")
260
self.created = datetime.datetime.utcnow()
262
self.last_enabled = None
263
self.last_checked_ok = None
264
self.timeout = string_to_delta(config["timeout"])
265
self.interval = string_to_delta(config["interval"])
266
self.disable_hook = disable_hook
545
267
self.checker = None
546
268
self.checker_initiator_tag = None
547
269
self.disable_initiator_tag = None
548
270
self.checker_callback_tag = None
271
self.checker_command = config["checker"]
549
272
self.current_checker_command = None
551
self.approvals_pending = 0
552
self.changedstate = (multiprocessing_manager
553
.Condition(multiprocessing_manager
555
self.client_structure = [attr for attr in
556
self.__dict__.iterkeys()
557
if not attr.startswith("_")]
558
self.client_structure.append("client_structure")
560
for name, t in inspect.getmembers(type(self),
564
if not name.startswith("_"):
565
self.client_structure.append(name)
567
# Send notice to process children that client state has changed
568
def send_changedstate(self):
569
with self.changedstate:
570
self.changedstate.notify_all()
273
self.last_connect = None
572
275
def enable(self):
573
276
"""Start this client's checker and timeout hooks"""
574
if getattr(self, "enabled", False):
577
self.expires = datetime.datetime.utcnow() + self.timeout
579
277
self.last_enabled = datetime.datetime.utcnow()
581
self.send_changedstate()
583
def disable(self, quiet=True):
584
"""Disable this client."""
585
if not getattr(self, "enabled", False):
588
logger.info("Disabling client %s", self.name)
589
if getattr(self, "disable_initiator_tag", None) is not None:
590
gobject.source_remove(self.disable_initiator_tag)
591
self.disable_initiator_tag = None
593
if getattr(self, "checker_initiator_tag", None) is not None:
594
gobject.source_remove(self.checker_initiator_tag)
595
self.checker_initiator_tag = None
599
self.send_changedstate()
600
# Do not run this again if called by a gobject.timeout_add
606
def init_checker(self):
607
278
# Schedule a new checker to be started an 'interval' from now,
608
279
# and every interval from then on.
609
if self.checker_initiator_tag is not None:
610
gobject.source_remove(self.checker_initiator_tag)
611
280
self.checker_initiator_tag = (gobject.timeout_add
613
.total_seconds() * 1000),
281
(self.interval_milliseconds(),
614
282
self.start_checker))
283
# Also start a new checker *right now*.
615
285
# Schedule a disable() when 'timeout' has passed
616
if self.disable_initiator_tag is not None:
286
self.disable_initiator_tag = (gobject.timeout_add
287
(self.timeout_milliseconds(),
292
"""Disable this client."""
293
if not getattr(self, "enabled", False):
295
logger.info(u"Disabling client %s", self.name)
296
if getattr(self, "disable_initiator_tag", False):
617
297
gobject.source_remove(self.disable_initiator_tag)
618
self.disable_initiator_tag = (gobject.timeout_add
620
.total_seconds() * 1000),
622
# Also start a new checker *right now*.
298
self.disable_initiator_tag = None
299
if getattr(self, "checker_initiator_tag", False):
300
gobject.source_remove(self.checker_initiator_tag)
301
self.checker_initiator_tag = None
303
if self.disable_hook:
304
self.disable_hook(self)
306
# Do not run this again if called by a gobject.timeout_add
310
self.disable_hook = None
625
313
def checker_callback(self, pid, condition, command):
626
314
"""The checker has completed, so take appropriate actions."""
627
315
self.checker_callback_tag = None
628
316
self.checker = None
629
317
if os.WIFEXITED(condition):
630
self.last_checker_status = os.WEXITSTATUS(condition)
631
if self.last_checker_status == 0:
632
logger.info("Checker for %(name)s succeeded",
318
exitstatus = os.WEXITSTATUS(condition)
320
logger.info(u"Checker for %(name)s succeeded",
634
322
self.checked_ok()
636
logger.info("Checker for %(name)s failed",
324
logger.info(u"Checker for %(name)s failed",
639
self.last_checker_status = -1
640
logger.warning("Checker for %(name)s crashed?",
327
logger.warning(u"Checker for %(name)s crashed?",
643
330
def checked_ok(self):
644
"""Assert that the client has been seen, alive and well."""
331
"""Bump up the timeout for this client.
333
This should only be called when the client has been seen,
645
336
self.last_checked_ok = datetime.datetime.utcnow()
646
self.last_checker_status = 0
649
def bump_timeout(self, timeout=None):
650
"""Bump up the timeout for this client."""
652
timeout = self.timeout
653
if self.disable_initiator_tag is not None:
654
gobject.source_remove(self.disable_initiator_tag)
655
self.disable_initiator_tag = None
656
if getattr(self, "enabled", False):
657
self.disable_initiator_tag = (gobject.timeout_add
658
(int(timeout.total_seconds()
659
* 1000), self.disable))
660
self.expires = datetime.datetime.utcnow() + timeout
662
def need_approval(self):
663
self.last_approval_request = datetime.datetime.utcnow()
337
gobject.source_remove(self.disable_initiator_tag)
338
self.disable_initiator_tag = (gobject.timeout_add
339
(self.timeout_milliseconds(),
665
342
def start_checker(self):
666
343
"""Start a new checker subprocess if one is not running.
754
411
self.checker_callback_tag = None
755
412
if getattr(self, "checker", None) is None:
757
logger.debug("Stopping checker for %(name)s", vars(self))
414
logger.debug(u"Stopping checker for %(name)s", vars(self))
759
self.checker.terminate()
416
os.kill(self.checker.pid, signal.SIGTERM)
761
418
#if self.checker.poll() is None:
762
# self.checker.kill()
763
except OSError as error:
419
# os.kill(self.checker.pid, signal.SIGKILL)
420
except OSError, error:
764
421
if error.errno != errno.ESRCH: # No such process
766
423
self.checker = None
769
def dbus_service_property(dbus_interface, signature="v",
770
access="readwrite", byte_arrays=False):
771
"""Decorators for marking methods of a DBusObjectWithProperties to
772
become properties on the D-Bus.
774
The decorated method will be called with no arguments by "Get"
775
and with one argument by "Set".
777
The parameters, where they are supported, are the same as
778
dbus.service.method, except there is only "signature", since the
779
type from Get() and the type sent to Set() is the same.
781
# Encoding deeply encoded byte arrays is not supported yet by the
782
# "Set" method, so we fail early here:
783
if byte_arrays and signature != "ay":
784
raise ValueError("Byte arrays not supported for non-'ay'"
785
" signature {!r}".format(signature))
787
func._dbus_is_property = True
788
func._dbus_interface = dbus_interface
789
func._dbus_signature = signature
790
func._dbus_access = access
791
func._dbus_name = func.__name__
792
if func._dbus_name.endswith("_dbus_property"):
793
func._dbus_name = func._dbus_name[:-14]
794
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
799
def dbus_interface_annotations(dbus_interface):
800
"""Decorator for marking functions returning interface annotations
804
@dbus_interface_annotations("org.example.Interface")
805
def _foo(self): # Function name does not matter
806
return {"org.freedesktop.DBus.Deprecated": "true",
807
"org.freedesktop.DBus.Property.EmitsChangedSignal":
811
func._dbus_is_interface = True
812
func._dbus_interface = dbus_interface
813
func._dbus_name = dbus_interface
818
def dbus_annotations(annotations):
819
"""Decorator to annotate D-Bus methods, signals or properties
822
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
823
"org.freedesktop.DBus.Property."
824
"EmitsChangedSignal": "false"})
825
@dbus_service_property("org.example.Interface", signature="b",
827
def Property_dbus_property(self):
828
return dbus.Boolean(False)
831
func._dbus_annotations = annotations
836
class DBusPropertyException(dbus.exceptions.DBusException):
837
"""A base class for D-Bus property-related exceptions
841
class DBusPropertyAccessException(DBusPropertyException):
842
"""A property's access permissions disallows an operation.
847
class DBusPropertyNotFound(DBusPropertyException):
848
"""An attempt was made to access a non-existing property.
853
class DBusObjectWithProperties(dbus.service.Object):
854
"""A D-Bus object with properties.
856
Classes inheriting from this can use the dbus_service_property
857
decorator to expose methods as D-Bus properties. It exposes the
858
standard Get(), Set(), and GetAll() methods on the D-Bus.
862
def _is_dbus_thing(thing):
863
"""Returns a function testing if an attribute is a D-Bus thing
865
If called like _is_dbus_thing("method") it returns a function
866
suitable for use as predicate to inspect.getmembers().
868
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
871
def _get_all_dbus_things(self, thing):
872
"""Returns a generator of (name, attribute) pairs
874
return ((getattr(athing.__get__(self), "_dbus_name",
876
athing.__get__(self))
877
for cls in self.__class__.__mro__
879
inspect.getmembers(cls,
880
self._is_dbus_thing(thing)))
882
def _get_dbus_property(self, interface_name, property_name):
883
"""Returns a bound method if one exists which is a D-Bus
884
property with the specified name and interface.
886
for cls in self.__class__.__mro__:
887
for name, value in (inspect.getmembers
889
self._is_dbus_thing("property"))):
890
if (value._dbus_name == property_name
891
and value._dbus_interface == interface_name):
892
return value.__get__(self)
895
raise DBusPropertyNotFound(self.dbus_object_path + ":"
896
+ interface_name + "."
899
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
901
def Get(self, interface_name, property_name):
902
"""Standard D-Bus property Get() method, see D-Bus standard.
904
prop = self._get_dbus_property(interface_name, property_name)
905
if prop._dbus_access == "write":
906
raise DBusPropertyAccessException(property_name)
908
if not hasattr(value, "variant_level"):
910
return type(value)(value, variant_level=value.variant_level+1)
912
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
913
def Set(self, interface_name, property_name, value):
914
"""Standard D-Bus property Set() method, see D-Bus standard.
916
prop = self._get_dbus_property(interface_name, property_name)
917
if prop._dbus_access == "read":
918
raise DBusPropertyAccessException(property_name)
919
if prop._dbus_get_args_options["byte_arrays"]:
920
# The byte_arrays option is not supported yet on
921
# signatures other than "ay".
922
if prop._dbus_signature != "ay":
923
raise ValueError("Byte arrays not supported for non-"
924
"'ay' signature {!r}"
925
.format(prop._dbus_signature))
926
value = dbus.ByteArray(b''.join(chr(byte)
930
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
931
out_signature="a{sv}")
932
def GetAll(self, interface_name):
933
"""Standard D-Bus property GetAll() method, see D-Bus
936
Note: Will not include properties with access="write".
939
for name, prop in self._get_all_dbus_things("property"):
941
and interface_name != prop._dbus_interface):
942
# Interface non-empty but did not match
944
# Ignore write-only properties
945
if prop._dbus_access == "write":
948
if not hasattr(value, "variant_level"):
949
properties[name] = value
951
properties[name] = type(value)(value, variant_level=
952
value.variant_level+1)
953
return dbus.Dictionary(properties, signature="sv")
955
@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
956
def PropertiesChanged(self, interface_name, changed_properties,
957
invalidated_properties):
958
"""Standard D-Bus PropertiesChanged() signal, see D-Bus
963
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
965
path_keyword='object_path',
966
connection_keyword='connection')
967
def Introspect(self, object_path, connection):
968
"""Overloading of standard D-Bus method.
970
Inserts property tags and interface annotation tags.
972
xmlstring = dbus.service.Object.Introspect(self, object_path,
975
document = xml.dom.minidom.parseString(xmlstring)
976
def make_tag(document, name, prop):
977
e = document.createElement("property")
978
e.setAttribute("name", name)
979
e.setAttribute("type", prop._dbus_signature)
980
e.setAttribute("access", prop._dbus_access)
982
for if_tag in document.getElementsByTagName("interface"):
984
for tag in (make_tag(document, name, prop)
986
in self._get_all_dbus_things("property")
987
if prop._dbus_interface
988
== if_tag.getAttribute("name")):
989
if_tag.appendChild(tag)
990
# Add annotation tags
991
for typ in ("method", "signal", "property"):
992
for tag in if_tag.getElementsByTagName(typ):
994
for name, prop in (self.
995
_get_all_dbus_things(typ)):
996
if (name == tag.getAttribute("name")
997
and prop._dbus_interface
998
== if_tag.getAttribute("name")):
999
annots.update(getattr
1001
"_dbus_annotations",
1003
for name, value in annots.items():
1004
ann_tag = document.createElement(
1006
ann_tag.setAttribute("name", name)
1007
ann_tag.setAttribute("value", value)
1008
tag.appendChild(ann_tag)
1009
# Add interface annotation tags
1010
for annotation, value in dict(
1011
itertools.chain.from_iterable(
1012
annotations().items()
1013
for name, annotations in
1014
self._get_all_dbus_things("interface")
1015
if name == if_tag.getAttribute("name")
1017
ann_tag = document.createElement("annotation")
1018
ann_tag.setAttribute("name", annotation)
1019
ann_tag.setAttribute("value", value)
1020
if_tag.appendChild(ann_tag)
1021
# Add the names to the return values for the
1022
# "org.freedesktop.DBus.Properties" methods
1023
if (if_tag.getAttribute("name")
1024
== "org.freedesktop.DBus.Properties"):
1025
for cn in if_tag.getElementsByTagName("method"):
1026
if cn.getAttribute("name") == "Get":
1027
for arg in cn.getElementsByTagName("arg"):
1028
if (arg.getAttribute("direction")
1030
arg.setAttribute("name", "value")
1031
elif cn.getAttribute("name") == "GetAll":
1032
for arg in cn.getElementsByTagName("arg"):
1033
if (arg.getAttribute("direction")
1035
arg.setAttribute("name", "props")
1036
xmlstring = document.toxml("utf-8")
1038
except (AttributeError, xml.dom.DOMException,
1039
xml.parsers.expat.ExpatError) as error:
1040
logger.error("Failed to override Introspection method",
1045
def datetime_to_dbus(dt, variant_level=0):
1046
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1048
return dbus.String("", variant_level = variant_level)
1049
return dbus.String(dt.isoformat(),
1050
variant_level=variant_level)
1053
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1054
"""A class decorator; applied to a subclass of
1055
dbus.service.Object, it will add alternate D-Bus attributes with
1056
interface names according to the "alt_interface_names" mapping.
1059
@alternate_dbus_interfaces({"org.example.Interface":
1060
"net.example.AlternateInterface"})
1061
class SampleDBusObject(dbus.service.Object):
1062
@dbus.service.method("org.example.Interface")
1063
def SampleDBusMethod():
1066
The above "SampleDBusMethod" on "SampleDBusObject" will be
1067
reachable via two interfaces: "org.example.Interface" and
1068
"net.example.AlternateInterface", the latter of which will have
1069
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1070
"true", unless "deprecate" is passed with a False value.
1072
This works for methods and signals, and also for D-Bus properties
1073
(from DBusObjectWithProperties) and interfaces (from the
1074
dbus_interface_annotations decorator).
1077
for orig_interface_name, alt_interface_name in (
1078
alt_interface_names.items()):
1080
interface_names = set()
1081
# Go though all attributes of the class
1082
for attrname, attribute in inspect.getmembers(cls):
1083
# Ignore non-D-Bus attributes, and D-Bus attributes
1084
# with the wrong interface name
1085
if (not hasattr(attribute, "_dbus_interface")
1086
or not attribute._dbus_interface
1087
.startswith(orig_interface_name)):
1089
# Create an alternate D-Bus interface name based on
1091
alt_interface = (attribute._dbus_interface
1092
.replace(orig_interface_name,
1093
alt_interface_name))
1094
interface_names.add(alt_interface)
1095
# Is this a D-Bus signal?
1096
if getattr(attribute, "_dbus_is_signal", False):
1097
# Extract the original non-method undecorated
1098
# function by black magic
1099
nonmethod_func = (dict(
1100
zip(attribute.func_code.co_freevars,
1101
attribute.__closure__))["func"]
1103
# Create a new, but exactly alike, function
1104
# object, and decorate it to be a new D-Bus signal
1105
# with the alternate D-Bus interface name
1106
new_function = (dbus.service.signal
1108
attribute._dbus_signature)
1109
(types.FunctionType(
1110
nonmethod_func.func_code,
1111
nonmethod_func.func_globals,
1112
nonmethod_func.func_name,
1113
nonmethod_func.func_defaults,
1114
nonmethod_func.func_closure)))
1115
# Copy annotations, if any
1117
new_function._dbus_annotations = (
1118
dict(attribute._dbus_annotations))
1119
except AttributeError:
1121
# Define a creator of a function to call both the
1122
# original and alternate functions, so both the
1123
# original and alternate signals gets sent when
1124
# the function is called
1125
def fixscope(func1, func2):
1126
"""This function is a scope container to pass
1127
func1 and func2 to the "call_both" function
1128
outside of its arguments"""
1129
def call_both(*args, **kwargs):
1130
"""This function will emit two D-Bus
1131
signals by calling func1 and func2"""
1132
func1(*args, **kwargs)
1133
func2(*args, **kwargs)
1135
# Create the "call_both" function and add it to
1137
attr[attrname] = fixscope(attribute, new_function)
1138
# Is this a D-Bus method?
1139
elif getattr(attribute, "_dbus_is_method", False):
1140
# Create a new, but exactly alike, function
1141
# object. Decorate it to be a new D-Bus method
1142
# with the alternate D-Bus interface name. Add it
1144
attr[attrname] = (dbus.service.method
1146
attribute._dbus_in_signature,
1147
attribute._dbus_out_signature)
1149
(attribute.func_code,
1150
attribute.func_globals,
1151
attribute.func_name,
1152
attribute.func_defaults,
1153
attribute.func_closure)))
1154
# Copy annotations, if any
1156
attr[attrname]._dbus_annotations = (
1157
dict(attribute._dbus_annotations))
1158
except AttributeError:
1160
# Is this a D-Bus property?
1161
elif getattr(attribute, "_dbus_is_property", False):
1162
# Create a new, but exactly alike, function
1163
# object, and decorate it to be a new D-Bus
1164
# property with the alternate D-Bus interface
1165
# name. Add it to the class.
1166
attr[attrname] = (dbus_service_property
1168
attribute._dbus_signature,
1169
attribute._dbus_access,
1171
._dbus_get_args_options
1174
(attribute.func_code,
1175
attribute.func_globals,
1176
attribute.func_name,
1177
attribute.func_defaults,
1178
attribute.func_closure)))
1179
# Copy annotations, if any
1181
attr[attrname]._dbus_annotations = (
1182
dict(attribute._dbus_annotations))
1183
except AttributeError:
1185
# Is this a D-Bus interface?
1186
elif getattr(attribute, "_dbus_is_interface", False):
1187
# Create a new, but exactly alike, function
1188
# object. Decorate it to be a new D-Bus interface
1189
# with the alternate D-Bus interface name. Add it
1191
attr[attrname] = (dbus_interface_annotations
1194
(attribute.func_code,
1195
attribute.func_globals,
1196
attribute.func_name,
1197
attribute.func_defaults,
1198
attribute.func_closure)))
1200
# Deprecate all alternate interfaces
1201
iname="_AlternateDBusNames_interface_annotation{}"
1202
for interface_name in interface_names:
1203
@dbus_interface_annotations(interface_name)
1205
return { "org.freedesktop.DBus.Deprecated":
1207
# Find an unused name
1208
for aname in (iname.format(i)
1209
for i in itertools.count()):
1210
if aname not in attr:
1214
# Replace the class with a new subclass of it with
1215
# methods, signals, etc. as created above.
1216
cls = type(b"{}Alternate".format(cls.__name__),
1222
@alternate_dbus_interfaces({"se.recompile.Mandos":
1223
"se.bsnet.fukt.Mandos"})
1224
class ClientDBus(Client, DBusObjectWithProperties):
425
def still_valid(self):
426
"""Has the timeout not yet passed for this client?"""
427
if not getattr(self, "enabled", False):
429
now = datetime.datetime.utcnow()
430
if self.last_checked_ok is None:
431
return now < (self.created + self.timeout)
433
return now < (self.last_checked_ok + self.timeout)
436
class ClientDBus(Client, dbus.service.Object):
1225
437
"""A Client class using D-Bus
1228
dbus_object_path: dbus.ObjectPath
1229
bus: dbus.SystemBus()
440
dbus_object_path: dbus.ObjectPath ; only set if self.use_dbus
1232
runtime_expansions = (Client.runtime_expansions
1233
+ ("dbus_object_path",))
1235
_interface = "se.recompile.Mandos.Client"
1237
442
# dbus.service.Object doesn't use super(), so we can't either.
1239
def __init__(self, bus = None, *args, **kwargs):
444
def __init__(self, *args, **kwargs):
1241
445
Client.__init__(self, *args, **kwargs)
1242
446
# Only now, when this client is initialized, can it show up on
1244
client_object_name = str(self.name).translate(
1245
{ord("."): ord("_"),
1246
ord("-"): ord("_")})
1247
448
self.dbus_object_path = (dbus.ObjectPath
1248
("/clients/" + client_object_name))
1249
DBusObjectWithProperties.__init__(self, self.bus,
1250
self.dbus_object_path)
1252
def notifychangeproperty(transform_func,
1253
dbus_name, type_func=lambda x: x,
1254
variant_level=1, invalidate_only=False,
1255
_interface=_interface):
1256
""" Modify a variable so that it's a property which announces
1257
its changes to DBus.
1259
transform_fun: Function that takes a value and a variant_level
1260
and transforms it to a D-Bus type.
1261
dbus_name: D-Bus name of the variable
1262
type_func: Function that transform the value before sending it
1263
to the D-Bus. Default: no transform
1264
variant_level: D-Bus variant level. Default: 1
1266
attrname = "_{}".format(dbus_name)
1267
def setter(self, value):
1268
if hasattr(self, "dbus_object_path"):
1269
if (not hasattr(self, attrname) or
1270
type_func(getattr(self, attrname, None))
1271
!= type_func(value)):
1273
self.PropertiesChanged(_interface,
1278
dbus_value = transform_func(type_func(value),
1281
self.PropertyChanged(dbus.String(dbus_name),
1283
self.PropertiesChanged(_interface,
1285
dbus.String(dbus_name):
1286
dbus_value }), dbus.Array())
1287
setattr(self, attrname, value)
1289
return property(lambda self: getattr(self, attrname), setter)
1291
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1292
approvals_pending = notifychangeproperty(dbus.Boolean,
1295
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1296
last_enabled = notifychangeproperty(datetime_to_dbus,
1298
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1299
type_func = lambda checker:
1300
checker is not None)
1301
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1303
last_checker_status = notifychangeproperty(dbus.Int16,
1304
"LastCheckerStatus")
1305
last_approval_request = notifychangeproperty(
1306
datetime_to_dbus, "LastApprovalRequest")
1307
approved_by_default = notifychangeproperty(dbus.Boolean,
1308
"ApprovedByDefault")
1309
approval_delay = notifychangeproperty(dbus.UInt64,
1312
lambda td: td.total_seconds()
1314
approval_duration = notifychangeproperty(
1315
dbus.UInt64, "ApprovalDuration",
1316
type_func = lambda td: td.total_seconds() * 1000)
1317
host = notifychangeproperty(dbus.String, "Host")
1318
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1319
type_func = lambda td:
1320
td.total_seconds() * 1000)
1321
extended_timeout = notifychangeproperty(
1322
dbus.UInt64, "ExtendedTimeout",
1323
type_func = lambda td: td.total_seconds() * 1000)
1324
interval = notifychangeproperty(dbus.UInt64,
1327
lambda td: td.total_seconds()
1329
checker_command = notifychangeproperty(dbus.String, "Checker")
1330
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1331
invalidate_only=True)
1333
del notifychangeproperty
450
+ self.name.replace(".", "_")))
451
dbus.service.Object.__init__(self, bus,
452
self.dbus_object_path)
454
oldstate = getattr(self, "enabled", False)
455
r = Client.enable(self)
456
if oldstate != self.enabled:
458
self.PropertyChanged(dbus.String(u"enabled"),
459
dbus.Boolean(True, variant_level=1))
460
self.PropertyChanged(dbus.String(u"last_enabled"),
461
(_datetime_to_dbus(self.last_enabled,
465
def disable(self, signal = True):
466
oldstate = getattr(self, "enabled", False)
467
r = Client.disable(self)
468
if signal and oldstate != self.enabled:
470
self.PropertyChanged(dbus.String(u"enabled"),
471
dbus.Boolean(False, variant_level=1))
1335
474
def __del__(self, *args, **kwargs):
1337
476
self.remove_from_connection()
1338
477
except LookupError:
1340
if hasattr(DBusObjectWithProperties, "__del__"):
1341
DBusObjectWithProperties.__del__(self, *args, **kwargs)
479
if hasattr(dbus.service.Object, "__del__"):
480
dbus.service.Object.__del__(self, *args, **kwargs)
1342
481
Client.__del__(self, *args, **kwargs)
1344
483
def checker_callback(self, pid, condition, command,
1345
484
*args, **kwargs):
1346
485
self.checker_callback_tag = None
1347
486
self.checker = None
488
self.PropertyChanged(dbus.String(u"checker_running"),
489
dbus.Boolean(False, variant_level=1))
1348
490
if os.WIFEXITED(condition):
1349
491
exitstatus = os.WEXITSTATUS(condition)
1350
492
# Emit D-Bus signal
559
# GetAllProperties - method
560
@dbus.service.method(_interface, out_signature="a{sv}")
561
def GetAllProperties(self):
563
return dbus.Dictionary({
565
dbus.String(self.name, variant_level=1),
566
dbus.String("fingerprint"):
567
dbus.String(self.fingerprint, variant_level=1),
569
dbus.String(self.host, variant_level=1),
570
dbus.String("created"):
571
_datetime_to_dbus(self.created, variant_level=1),
572
dbus.String("last_enabled"):
573
(_datetime_to_dbus(self.last_enabled,
575
if self.last_enabled is not None
576
else dbus.Boolean(False, variant_level=1)),
577
dbus.String("enabled"):
578
dbus.Boolean(self.enabled, variant_level=1),
579
dbus.String("last_checked_ok"):
580
(_datetime_to_dbus(self.last_checked_ok,
582
if self.last_checked_ok is not None
583
else dbus.Boolean (False, variant_level=1)),
584
dbus.String("timeout"):
585
dbus.UInt64(self.timeout_milliseconds(),
587
dbus.String("interval"):
588
dbus.UInt64(self.interval_milliseconds(),
590
dbus.String("checker"):
591
dbus.String(self.checker_command,
593
dbus.String("checker_running"):
594
dbus.Boolean(self.checker is not None,
596
dbus.String("object_path"):
597
dbus.ObjectPath(self.dbus_object_path,
601
# IsStillValid - method
602
@dbus.service.method(_interface, out_signature="b")
603
def IsStillValid(self):
604
return self.still_valid()
1401
606
# PropertyChanged - signal
1402
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1403
607
@dbus.service.signal(_interface, signature="sv")
1404
608
def PropertyChanged(self, property, value):
1408
# GotSecret - signal
612
# ReceivedSecret - signal
1409
613
@dbus.service.signal(_interface)
1410
def GotSecret(self):
1412
Is sent after a successful transfer of secret from the Mandos
1413
server to mandos-client
614
def ReceivedSecret(self):
1417
618
# Rejected - signal
1418
@dbus.service.signal(_interface, signature="s")
1419
def Rejected(self, reason):
619
@dbus.service.signal(_interface)
1423
# NeedApproval - signal
1424
@dbus.service.signal(_interface, signature="tb")
1425
def NeedApproval(self, timeout, default):
1427
return self.need_approval()
1432
@dbus.service.method(_interface, in_signature="b")
1433
def Approve(self, value):
1436
# CheckedOK - method
1437
@dbus.service.method(_interface)
1438
def CheckedOK(self):
624
# SetChecker - method
625
@dbus.service.method(_interface, in_signature="s")
626
def SetChecker(self, checker):
627
"D-Bus setter method"
628
self.checker_command = checker
630
self.PropertyChanged(dbus.String(u"checker"),
631
dbus.String(self.checker_command,
635
@dbus.service.method(_interface, in_signature="s")
636
def SetHost(self, host):
637
"D-Bus setter method"
640
self.PropertyChanged(dbus.String(u"host"),
641
dbus.String(self.host, variant_level=1))
643
# SetInterval - method
644
@dbus.service.method(_interface, in_signature="t")
645
def SetInterval(self, milliseconds):
646
self.interval = datetime.timedelta(0, 0, 0, milliseconds)
648
self.PropertyChanged(dbus.String(u"interval"),
649
(dbus.UInt64(self.interval_milliseconds(),
653
@dbus.service.method(_interface, in_signature="ay",
655
def SetSecret(self, secret):
656
"D-Bus setter method"
657
self.secret = str(secret)
659
# SetTimeout - method
660
@dbus.service.method(_interface, in_signature="t")
661
def SetTimeout(self, milliseconds):
662
self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
664
self.PropertyChanged(dbus.String(u"timeout"),
665
(dbus.UInt64(self.timeout_milliseconds(),
1441
668
# Enable - method
1442
@dbus.service.method(_interface)
669
Enable = dbus.service.method(_interface)(enable)
670
Enable.__name__ = "Enable"
1447
672
# StartChecker - method
1448
673
@dbus.service.method(_interface)
1459
684
# StopChecker - method
1460
@dbus.service.method(_interface)
1461
def StopChecker(self):
1466
# ApprovalPending - property
1467
@dbus_service_property(_interface, signature="b", access="read")
1468
def ApprovalPending_dbus_property(self):
1469
return dbus.Boolean(bool(self.approvals_pending))
1471
# ApprovedByDefault - property
1472
@dbus_service_property(_interface, signature="b",
1474
def ApprovedByDefault_dbus_property(self, value=None):
1475
if value is None: # get
1476
return dbus.Boolean(self.approved_by_default)
1477
self.approved_by_default = bool(value)
1479
# ApprovalDelay - property
1480
@dbus_service_property(_interface, signature="t",
1482
def ApprovalDelay_dbus_property(self, value=None):
1483
if value is None: # get
1484
return dbus.UInt64(self.approval_delay.total_seconds()
1486
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1488
# ApprovalDuration - property
1489
@dbus_service_property(_interface, signature="t",
1491
def ApprovalDuration_dbus_property(self, value=None):
1492
if value is None: # get
1493
return dbus.UInt64(self.approval_duration.total_seconds()
1495
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1498
@dbus_service_property(_interface, signature="s", access="read")
1499
def Name_dbus_property(self):
1500
return dbus.String(self.name)
1502
# Fingerprint - property
1503
@dbus_service_property(_interface, signature="s", access="read")
1504
def Fingerprint_dbus_property(self):
1505
return dbus.String(self.fingerprint)
1508
@dbus_service_property(_interface, signature="s",
1510
def Host_dbus_property(self, value=None):
1511
if value is None: # get
1512
return dbus.String(self.host)
1513
self.host = str(value)
1515
# Created - property
1516
@dbus_service_property(_interface, signature="s", access="read")
1517
def Created_dbus_property(self):
1518
return datetime_to_dbus(self.created)
1520
# LastEnabled - property
1521
@dbus_service_property(_interface, signature="s", access="read")
1522
def LastEnabled_dbus_property(self):
1523
return datetime_to_dbus(self.last_enabled)
1525
# Enabled - property
1526
@dbus_service_property(_interface, signature="b",
1528
def Enabled_dbus_property(self, value=None):
1529
if value is None: # get
1530
return dbus.Boolean(self.enabled)
1536
# LastCheckedOK - property
1537
@dbus_service_property(_interface, signature="s",
1539
def LastCheckedOK_dbus_property(self, value=None):
1540
if value is not None:
1543
return datetime_to_dbus(self.last_checked_ok)
1545
# LastCheckerStatus - property
1546
@dbus_service_property(_interface, signature="n",
1548
def LastCheckerStatus_dbus_property(self):
1549
return dbus.Int16(self.last_checker_status)
1551
# Expires - property
1552
@dbus_service_property(_interface, signature="s", access="read")
1553
def Expires_dbus_property(self):
1554
return datetime_to_dbus(self.expires)
1556
# LastApprovalRequest - property
1557
@dbus_service_property(_interface, signature="s", access="read")
1558
def LastApprovalRequest_dbus_property(self):
1559
return datetime_to_dbus(self.last_approval_request)
1561
# Timeout - property
1562
@dbus_service_property(_interface, signature="t",
1564
def Timeout_dbus_property(self, value=None):
1565
if value is None: # get
1566
return dbus.UInt64(self.timeout.total_seconds() * 1000)
1567
old_timeout = self.timeout
1568
self.timeout = datetime.timedelta(0, 0, 0, value)
1569
# Reschedule disabling
1571
now = datetime.datetime.utcnow()
1572
self.expires += self.timeout - old_timeout
1573
if self.expires <= now:
1574
# The timeout has passed
1577
if (getattr(self, "disable_initiator_tag", None)
1580
gobject.source_remove(self.disable_initiator_tag)
1581
self.disable_initiator_tag = (
1582
gobject.timeout_add(
1583
int((self.expires - now).total_seconds()
1584
* 1000), self.disable))
1586
# ExtendedTimeout - property
1587
@dbus_service_property(_interface, signature="t",
1589
def ExtendedTimeout_dbus_property(self, value=None):
1590
if value is None: # get
1591
return dbus.UInt64(self.extended_timeout.total_seconds()
1593
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1595
# Interval - property
1596
@dbus_service_property(_interface, signature="t",
1598
def Interval_dbus_property(self, value=None):
1599
if value is None: # get
1600
return dbus.UInt64(self.interval.total_seconds() * 1000)
1601
self.interval = datetime.timedelta(0, 0, 0, value)
1602
if getattr(self, "checker_initiator_tag", None) is None:
1605
# Reschedule checker run
1606
gobject.source_remove(self.checker_initiator_tag)
1607
self.checker_initiator_tag = (gobject.timeout_add
1608
(value, self.start_checker))
1609
self.start_checker() # Start one now, too
1611
# Checker - property
1612
@dbus_service_property(_interface, signature="s",
1614
def Checker_dbus_property(self, value=None):
1615
if value is None: # get
1616
return dbus.String(self.checker_command)
1617
self.checker_command = str(value)
1619
# CheckerRunning - property
1620
@dbus_service_property(_interface, signature="b",
1622
def CheckerRunning_dbus_property(self, value=None):
1623
if value is None: # get
1624
return dbus.Boolean(self.checker is not None)
1626
self.start_checker()
1630
# ObjectPath - property
1631
@dbus_service_property(_interface, signature="o", access="read")
1632
def ObjectPath_dbus_property(self):
1633
return self.dbus_object_path # is already a dbus.ObjectPath
1636
@dbus_service_property(_interface, signature="ay",
1637
access="write", byte_arrays=True)
1638
def Secret_dbus_property(self, value):
1639
self.secret = bytes(value)
685
StopChecker = dbus.service.method(_interface)(stop_checker)
686
StopChecker.__name__ = "StopChecker"
1644
class ProxyClient(object):
1645
def __init__(self, child_pipe, fpr, address):
1646
self._pipe = child_pipe
1647
self._pipe.send(('init', fpr, address))
1648
if not self._pipe.recv():
1651
def __getattribute__(self, name):
1653
return super(ProxyClient, self).__getattribute__(name)
1654
self._pipe.send(('getattr', name))
1655
data = self._pipe.recv()
1656
if data[0] == 'data':
1658
if data[0] == 'function':
1659
def func(*args, **kwargs):
1660
self._pipe.send(('funcall', name, args, kwargs))
1661
return self._pipe.recv()[1]
1664
def __setattr__(self, name, value):
1666
return super(ProxyClient, self).__setattr__(name, value)
1667
self._pipe.send(('setattr', name, value))
1670
class ClientHandler(socketserver.BaseRequestHandler, object):
691
class ClientHandler(SocketServer.BaseRequestHandler, object):
1671
692
"""A class to handle client connections.
1673
694
Instantiated once for each connection to handle it.
1674
695
Note: This will run in its own forked process."""
1676
697
def handle(self):
1677
with contextlib.closing(self.server.child_pipe) as child_pipe:
1678
logger.info("TCP connection from: %s",
1679
str(self.client_address))
1680
logger.debug("Pipe FD: %d",
1681
self.server.child_pipe.fileno())
698
logger.info(u"TCP connection from: %s",
699
unicode(self.client_address))
700
logger.debug(u"IPC Pipe FD: %d", self.server.pipe[1])
701
# Open IPC pipe to parent process
702
with closing(os.fdopen(self.server.pipe[1], "w", 1)) as ipc:
1683
703
session = (gnutls.connection
1684
704
.ClientSession(self.request,
1685
705
gnutls.connection
1686
706
.X509Credentials()))
708
line = self.request.makefile().readline()
709
logger.debug(u"Protocol version: %r", line)
711
if int(line.strip().split()[0]) > 1:
713
except (ValueError, IndexError, RuntimeError), error:
714
logger.error(u"Unknown protocol version: %s", error)
1688
717
# Note: gnutls.connection.X509Credentials is really a
1689
718
# generic GnuTLS certificate credentials object so long as
1690
719
# no X.509 keys are added to it. Therefore, we can use it
1691
720
# here despite using OpenPGP certificates.
1693
722
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1694
# "+AES-256-CBC", "+SHA1",
1695
# "+COMP-NULL", "+CTYPE-OPENPGP",
723
# "+AES-256-CBC", "+SHA1",
724
# "+COMP-NULL", "+CTYPE-OPENPGP",
1697
726
# Use a fallback default, since this MUST be set.
1698
727
priority = self.server.gnutls_priority
1699
728
if priority is None:
1882
832
# Convert the buffer to a Python bytestring
1883
833
fpr = ctypes.string_at(buf, buf_len.value)
1884
834
# Convert the bytestring to hexadecimal notation
1885
hex_fpr = binascii.hexlify(fpr).upper()
835
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
1889
class MultiprocessingMixIn(object):
1890
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1891
def sub_process_main(self, request, address):
1893
self.finish_request(request, address)
1895
self.handle_error(request, address)
1896
self.close_request(request)
839
class ForkingMixInWithPipe(SocketServer.ForkingMixIn, object):
840
"""Like SocketServer.ForkingMixIn, but also pass a pipe.
1898
def process_request(self, request, address):
1899
"""Start a new process to process the request."""
1900
proc = multiprocessing.Process(target = self.sub_process_main,
1901
args = (request, address))
1906
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1907
""" adds a pipe to the MixIn """
842
Assumes a gobject.MainLoop event loop.
1908
844
def process_request(self, request, client_address):
1909
845
"""Overrides and wraps the original process_request().
1911
This function creates a new pipe in self.pipe
847
This function creates a new pipe in self.pipe
1913
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1915
proc = MultiprocessingMixIn.process_request(self, request,
1917
self.child_pipe.close()
1918
self.add_pipe(parent_pipe, proc)
1920
def add_pipe(self, parent_pipe, proc):
849
self.pipe = os.pipe()
850
super(ForkingMixInWithPipe,
851
self).process_request(request, client_address)
852
os.close(self.pipe[1]) # close write end
853
# Call "handle_ipc" for both data and EOF events
854
gobject.io_add_watch(self.pipe[0],
855
gobject.IO_IN | gobject.IO_HUP,
857
def handle_ipc(source, condition):
1921
858
"""Dummy function; override as necessary"""
1922
raise NotImplementedError()
1925
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1926
socketserver.TCPServer, object):
863
class IPv6_TCPServer(ForkingMixInWithPipe,
864
SocketServer.TCPServer, object):
1927
865
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1930
868
enabled: Boolean; whether this server is activated yet
1931
869
interface: None or a network interface name (string)
1932
870
use_ipv6: Boolean; to use IPv6 or not
872
clients: Set() of Client objects
873
gnutls_priority GnuTLS priority string
874
use_dbus: Boolean; to emit D-Bus signals or not
1934
876
def __init__(self, server_address, RequestHandlerClass,
1935
interface=None, use_ipv6=True, socketfd=None):
1936
"""If socketfd is set, use that file descriptor instead of
1937
creating a new one with socket.socket().
877
interface=None, use_ipv6=True, clients=None,
878
gnutls_priority=None, use_dbus=True):
1939
880
self.interface = interface
1941
882
self.address_family = socket.AF_INET6
1942
if socketfd is not None:
1943
# Save the file descriptor
1944
self.socketfd = socketfd
1945
# Save the original socket.socket() function
1946
self.socket_socket = socket.socket
1947
# To implement --socket, we monkey patch socket.socket.
1949
# (When socketserver.TCPServer is a new-style class, we
1950
# could make self.socket into a property instead of monkey
1951
# patching socket.socket.)
1953
# Create a one-time-only replacement for socket.socket()
1954
@functools.wraps(socket.socket)
1955
def socket_wrapper(*args, **kwargs):
1956
# Restore original function so subsequent calls are
1958
socket.socket = self.socket_socket
1959
del self.socket_socket
1960
# This time only, return a new socket object from the
1961
# saved file descriptor.
1962
return socket.fromfd(self.socketfd, *args, **kwargs)
1963
# Replace socket.socket() function with wrapper
1964
socket.socket = socket_wrapper
1965
# The socketserver.TCPServer.__init__ will call
1966
# socket.socket(), which might be our replacement,
1967
# socket_wrapper(), if socketfd was set.
1968
socketserver.TCPServer.__init__(self, server_address,
883
self.clients = clients
884
self.use_dbus = use_dbus
885
self.gnutls_priority = gnutls_priority
886
SocketServer.TCPServer.__init__(self, server_address,
1969
887
RequestHandlerClass)
1971
888
def server_bind(self):
1972
889
"""This overrides the normal server_bind() function
1973
890
to bind to an interface if one was specified, and also NOT to
1974
891
bind to an address or port if they were not specified."""
1975
892
if self.interface is not None:
1976
if SO_BINDTODEVICE is None:
1977
logger.error("SO_BINDTODEVICE does not exist;"
1978
" cannot bind to interface %s",
1982
self.socket.setsockopt(socket.SOL_SOCKET,
1984
(self.interface + "\0")
1986
except socket.error as error:
1987
if error.errno == errno.EPERM:
1988
logger.error("No permission to bind to"
1989
" interface %s", self.interface)
1990
elif error.errno == errno.ENOPROTOOPT:
1991
logger.error("SO_BINDTODEVICE not available;"
1992
" cannot bind to interface %s",
1994
elif error.errno == errno.ENODEV:
1995
logger.error("Interface %s does not exist,"
1996
" cannot bind", self.interface)
894
self.socket.setsockopt(socket.SOL_SOCKET,
896
self.interface + '\0')
897
except socket.error, error:
898
if error[0] == errno.EPERM:
899
logger.error(u"No permission to"
900
u" bind to interface %s",
1999
904
# Only bind(2) the socket if we really need to.
2000
905
if self.server_address[0] or self.server_address[1]:
2001
906
if not self.server_address[0]:
2002
907
if self.address_family == socket.AF_INET6:
2003
908
any_address = "::" # in6addr_any
2005
any_address = "0.0.0.0" # INADDR_ANY
910
any_address = socket.INADDR_ANY
2006
911
self.server_address = (any_address,
2007
912
self.server_address[1])
2008
913
elif not self.server_address[1]:
2015
920
# if_nametoindex
2016
921
# (self.interface))
2017
return socketserver.TCPServer.server_bind(self)
2020
class MandosServer(IPv6_TCPServer):
2024
clients: set of Client objects
2025
gnutls_priority GnuTLS priority string
2026
use_dbus: Boolean; to emit D-Bus signals or not
2028
Assumes a gobject.MainLoop event loop.
2030
def __init__(self, server_address, RequestHandlerClass,
2031
interface=None, use_ipv6=True, clients=None,
2032
gnutls_priority=None, use_dbus=True, socketfd=None):
2033
self.enabled = False
2034
self.clients = clients
2035
if self.clients is None:
2037
self.use_dbus = use_dbus
2038
self.gnutls_priority = gnutls_priority
2039
IPv6_TCPServer.__init__(self, server_address,
2040
RequestHandlerClass,
2041
interface = interface,
2042
use_ipv6 = use_ipv6,
2043
socketfd = socketfd)
922
return SocketServer.TCPServer.server_bind(self)
2044
923
def server_activate(self):
2045
924
if self.enabled:
2046
return socketserver.TCPServer.server_activate(self)
925
return SocketServer.TCPServer.server_activate(self)
2048
926
def enable(self):
2049
927
self.enabled = True
2051
def add_pipe(self, parent_pipe, proc):
2052
# Call "handle_ipc" for both data and EOF events
2053
gobject.io_add_watch(parent_pipe.fileno(),
2054
gobject.IO_IN | gobject.IO_HUP,
2055
functools.partial(self.handle_ipc,
2060
def handle_ipc(self, source, condition, parent_pipe=None,
2061
proc = None, client_object=None):
2062
# error, or the other end of multiprocessing.Pipe has closed
2063
if condition & (gobject.IO_ERR | gobject.IO_HUP):
2064
# Wait for other process to exit
2068
# Read a request from the child
2069
request = parent_pipe.recv()
2070
command = request[0]
2072
if command == 'init':
2074
address = request[2]
2076
for c in self.clients.itervalues():
2077
if c.fingerprint == fpr:
2081
logger.info("Client not found for fingerprint: %s, ad"
2082
"dress: %s", fpr, address)
2085
mandos_dbus_service.ClientNotFound(fpr,
2087
parent_pipe.send(False)
2090
gobject.io_add_watch(parent_pipe.fileno(),
2091
gobject.IO_IN | gobject.IO_HUP,
2092
functools.partial(self.handle_ipc,
2098
parent_pipe.send(True)
2099
# remove the old hook in favor of the new above hook on
2102
if command == 'funcall':
2103
funcname = request[1]
2107
parent_pipe.send(('data', getattr(client_object,
2111
if command == 'getattr':
2112
attrname = request[1]
2113
if callable(client_object.__getattribute__(attrname)):
2114
parent_pipe.send(('function',))
2116
parent_pipe.send(('data', client_object
2117
.__getattribute__(attrname)))
2119
if command == 'setattr':
2120
attrname = request[1]
2122
setattr(client_object, attrname, value)
928
def handle_ipc(self, source, condition, file_objects={}):
930
gobject.IO_IN: "IN", # There is data to read.
931
gobject.IO_OUT: "OUT", # Data can be written (without
933
gobject.IO_PRI: "PRI", # There is urgent data to read.
934
gobject.IO_ERR: "ERR", # Error condition.
935
gobject.IO_HUP: "HUP" # Hung up (the connection has been
936
# broken, usually for pipes and
939
conditions_string = ' | '.join(name
941
condition_names.iteritems()
943
logger.debug("Handling IPC: FD = %d, condition = %s", source,
946
# Turn the pipe file descriptor into a Python file object
947
if source not in file_objects:
948
file_objects[source] = os.fdopen(source, "r", 1)
950
# Read a line from the file object
951
cmdline = file_objects[source].readline()
952
if not cmdline: # Empty line means end of file
954
file_objects[source].close()
955
del file_objects[source]
957
# Stop calling this function
960
logger.debug("IPC command: %r", cmdline)
962
# Parse and act on command
963
cmd, args = cmdline.rstrip("\r\n").split(None, 1)
965
if cmd == "NOTFOUND":
966
logger.warning(u"Client not found for fingerprint: %s",
970
mandos_dbus_service.ClientNotFound(args)
971
elif cmd == "INVALID":
972
for client in self.clients:
973
if client.name == args:
974
logger.warning(u"Client %s is invalid", args)
980
logger.error(u"Unknown client %s is invalid", args)
981
elif cmd == "SENDING":
982
for client in self.clients:
983
if client.name == args:
984
logger.info(u"Sending secret to %s", client.name)
988
client.ReceivedSecret()
991
logger.error(u"Sending secret to unknown client %s",
994
logger.error("Unknown IPC command: %r", cmdline)
996
# Keep calling this function
2127
def rfc3339_duration_to_delta(duration):
2128
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2130
>>> rfc3339_duration_to_delta("P7D")
2131
datetime.timedelta(7)
2132
>>> rfc3339_duration_to_delta("PT60S")
2133
datetime.timedelta(0, 60)
2134
>>> rfc3339_duration_to_delta("PT60M")
2135
datetime.timedelta(0, 3600)
2136
>>> rfc3339_duration_to_delta("PT24H")
2137
datetime.timedelta(1)
2138
>>> rfc3339_duration_to_delta("P1W")
2139
datetime.timedelta(7)
2140
>>> rfc3339_duration_to_delta("PT5M30S")
2141
datetime.timedelta(0, 330)
2142
>>> rfc3339_duration_to_delta("P1DT3M20S")
2143
datetime.timedelta(1, 200)
2146
# Parsing an RFC 3339 duration with regular expressions is not
2147
# possible - there would have to be multiple places for the same
2148
# values, like seconds. The current code, while more esoteric, is
2149
# cleaner without depending on a parsing library. If Python had a
2150
# built-in library for parsing we would use it, but we'd like to
2151
# avoid excessive use of external libraries.
2153
# New type for defining tokens, syntax, and semantics all-in-one
2154
Token = collections.namedtuple("Token",
2155
("regexp", # To match token; if
2156
# "value" is not None,
2157
# must have a "group"
2159
"value", # datetime.timedelta or
2161
"followers")) # Tokens valid after
2163
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2164
# the "duration" ABNF definition in RFC 3339, Appendix A.
2165
token_end = Token(re.compile(r"$"), None, frozenset())
2166
token_second = Token(re.compile(r"(\d+)S"),
2167
datetime.timedelta(seconds=1),
2168
frozenset((token_end,)))
2169
token_minute = Token(re.compile(r"(\d+)M"),
2170
datetime.timedelta(minutes=1),
2171
frozenset((token_second, token_end)))
2172
token_hour = Token(re.compile(r"(\d+)H"),
2173
datetime.timedelta(hours=1),
2174
frozenset((token_minute, token_end)))
2175
token_time = Token(re.compile(r"T"),
2177
frozenset((token_hour, token_minute,
2179
token_day = Token(re.compile(r"(\d+)D"),
2180
datetime.timedelta(days=1),
2181
frozenset((token_time, token_end)))
2182
token_month = Token(re.compile(r"(\d+)M"),
2183
datetime.timedelta(weeks=4),
2184
frozenset((token_day, token_end)))
2185
token_year = Token(re.compile(r"(\d+)Y"),
2186
datetime.timedelta(weeks=52),
2187
frozenset((token_month, token_end)))
2188
token_week = Token(re.compile(r"(\d+)W"),
2189
datetime.timedelta(weeks=1),
2190
frozenset((token_end,)))
2191
token_duration = Token(re.compile(r"P"), None,
2192
frozenset((token_year, token_month,
2193
token_day, token_time,
2195
# Define starting values
2196
value = datetime.timedelta() # Value so far
2198
followers = frozenset((token_duration,)) # Following valid tokens
2199
s = duration # String left to parse
2200
# Loop until end token is found
2201
while found_token is not token_end:
2202
# Search for any currently valid tokens
2203
for token in followers:
2204
match = token.regexp.match(s)
2205
if match is not None:
2207
if token.value is not None:
2208
# Value found, parse digits
2209
factor = int(match.group(1), 10)
2210
# Add to value so far
2211
value += factor * token.value
2212
# Strip token from string
2213
s = token.regexp.sub("", s, 1)
2216
# Set valid next tokens
2217
followers = found_token.followers
2220
# No currently valid tokens were found
2221
raise ValueError("Invalid RFC 3339 duration")
2226
1000
def string_to_delta(interval):
2227
1001
"""Parse a string and return a datetime.timedelta
2298
##################################################################
1111
######################################################################
2299
1112
# Parsing of options, both command line and config file
2301
parser = argparse.ArgumentParser()
2302
parser.add_argument("-v", "--version", action="version",
2303
version = "%(prog)s {}".format(version),
2304
help="show version number and exit")
2305
parser.add_argument("-i", "--interface", metavar="IF",
2306
help="Bind to interface IF")
2307
parser.add_argument("-a", "--address",
2308
help="Address to listen for requests on")
2309
parser.add_argument("-p", "--port", type=int,
2310
help="Port number to receive requests on")
2311
parser.add_argument("--check", action="store_true",
2312
help="Run self-test")
2313
parser.add_argument("--debug", action="store_true",
2314
help="Debug mode; run in foreground and log"
2315
" to terminal", default=None)
2316
parser.add_argument("--debuglevel", metavar="LEVEL",
2317
help="Debug level for stdout output")
2318
parser.add_argument("--priority", help="GnuTLS"
2319
" priority string (see GnuTLS documentation)")
2320
parser.add_argument("--servicename",
2321
metavar="NAME", help="Zeroconf service name")
2322
parser.add_argument("--configdir",
2323
default="/etc/mandos", metavar="DIR",
2324
help="Directory to search for configuration"
2326
parser.add_argument("--no-dbus", action="store_false",
2327
dest="use_dbus", help="Do not provide D-Bus"
2328
" system bus interface", default=None)
2329
parser.add_argument("--no-ipv6", action="store_false",
2330
dest="use_ipv6", help="Do not use IPv6",
2332
parser.add_argument("--no-restore", action="store_false",
2333
dest="restore", help="Do not restore stored"
2334
" state", default=None)
2335
parser.add_argument("--socket", type=int,
2336
help="Specify a file descriptor to a network"
2337
" socket to use instead of creating one")
2338
parser.add_argument("--statedir", metavar="DIR",
2339
help="Directory to save/restore state in")
2340
parser.add_argument("--foreground", action="store_true",
2341
help="Run in foreground", default=None)
2342
parser.add_argument("--no-zeroconf", action="store_false",
2343
dest="zeroconf", help="Do not use Zeroconf",
2346
options = parser.parse_args()
1114
parser = optparse.OptionParser(version = "%%prog %s" % version)
1115
parser.add_option("-i", "--interface", type="string",
1116
metavar="IF", help="Bind to interface IF")
1117
parser.add_option("-a", "--address", type="string",
1118
help="Address to listen for requests on")
1119
parser.add_option("-p", "--port", type="int",
1120
help="Port number to receive requests on")
1121
parser.add_option("--check", action="store_true",
1122
help="Run self-test")
1123
parser.add_option("--debug", action="store_true",
1124
help="Debug mode; run in foreground and log to"
1126
parser.add_option("--priority", type="string", help="GnuTLS"
1127
" priority string (see GnuTLS documentation)")
1128
parser.add_option("--servicename", type="string", metavar="NAME",
1129
help="Zeroconf service name")
1130
parser.add_option("--configdir", type="string",
1131
default="/etc/mandos", metavar="DIR",
1132
help="Directory to search for configuration"
1134
parser.add_option("--no-dbus", action="store_false",
1136
help="Do not provide D-Bus system bus"
1138
parser.add_option("--no-ipv6", action="store_false",
1139
dest="use_ipv6", help="Do not use IPv6")
1140
options = parser.parse_args()[0]
2348
1142
if options.check:
2350
fail_count, test_count = doctest.testmod()
2351
sys.exit(os.EX_OK if fail_count == 0 else 1)
2353
1147
# Default values for config file for server-global settings
2354
1148
server_defaults = { "interface": "",
2357
1151
"debug": "False",
2359
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2360
":+SIGN-RSA-SHA224:+SIGN-RSA-RMD160",
1153
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2361
1154
"servicename": "Mandos",
2362
1155
"use_dbus": "True",
2363
1156
"use_ipv6": "True",
2367
"statedir": "/var/lib/mandos",
2368
"foreground": "False",
2372
1159
# Parse config file for server-global settings
2373
server_config = configparser.SafeConfigParser(server_defaults)
1160
server_config = ConfigParser.SafeConfigParser(server_defaults)
2374
1161
del server_defaults
2375
server_config.read(os.path.join(options.configdir,
1162
server_config.read(os.path.join(options.configdir, "mandos.conf"))
2377
1163
# Convert the SafeConfigParser object to a dict
2378
1164
server_settings = server_config.defaults()
2379
1165
# Use the appropriate methods on the non-string config options
2380
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
2381
server_settings[option] = server_config.getboolean("DEFAULT",
1166
server_settings["debug"] = server_config.getboolean("DEFAULT",
1168
server_settings["use_dbus"] = server_config.getboolean("DEFAULT",
1170
server_settings["use_ipv6"] = server_config.getboolean("DEFAULT",
2383
1172
if server_settings["port"]:
2384
1173
server_settings["port"] = server_config.getint("DEFAULT",
2386
if server_settings["socket"]:
2387
server_settings["socket"] = server_config.getint("DEFAULT",
2389
# Later, stdin will, and stdout and stderr might, be dup'ed
2390
# over with an opened os.devnull. But we don't want this to
2391
# happen with a supplied network socket.
2392
if 0 <= server_settings["socket"] <= 2:
2393
server_settings["socket"] = os.dup(server_settings
2395
1175
del server_config
2397
1177
# Override the settings from the config file with command line
2398
1178
# options, if set.
2399
1179
for option in ("interface", "address", "port", "debug",
2400
1180
"priority", "servicename", "configdir",
2401
"use_dbus", "use_ipv6", "debuglevel", "restore",
2402
"statedir", "socket", "foreground", "zeroconf"):
1181
"use_dbus", "use_ipv6"):
2403
1182
value = getattr(options, option)
2404
1183
if value is not None:
2405
1184
server_settings[option] = value
2407
# Force all strings to be unicode
2408
for option in server_settings.keys():
2409
if isinstance(server_settings[option], bytes):
2410
server_settings[option] = (server_settings[option]
2412
# Force all boolean options to be boolean
2413
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2414
"foreground", "zeroconf"):
2415
server_settings[option] = bool(server_settings[option])
2416
# Debug implies foreground
2417
if server_settings["debug"]:
2418
server_settings["foreground"] = True
2419
1186
# Now we have our good server settings in "server_settings"
2421
1188
##################################################################
2423
if (not server_settings["zeroconf"] and
2424
not (server_settings["port"]
2425
or server_settings["socket"] != "")):
2426
parser.error("Needs port or socket to work without"
2429
1190
# For convenience
2430
1191
debug = server_settings["debug"]
2431
debuglevel = server_settings["debuglevel"]
2432
1192
use_dbus = server_settings["use_dbus"]
2433
1193
use_ipv6 = server_settings["use_ipv6"]
2434
stored_state_path = os.path.join(server_settings["statedir"],
2436
foreground = server_settings["foreground"]
2437
zeroconf = server_settings["zeroconf"]
2440
initlogger(debug, logging.DEBUG)
2445
level = getattr(logging, debuglevel.upper())
2446
initlogger(debug, level)
1196
syslogger.setLevel(logging.WARNING)
1197
console.setLevel(logging.WARNING)
2448
1199
if server_settings["servicename"] != "Mandos":
2449
1200
syslogger.setFormatter(logging.Formatter
2450
('Mandos ({}) [%(process)d]:'
2451
' %(levelname)s: %(message)s'
2452
.format(server_settings
1201
('Mandos (%s) [%%(process)d]:'
1202
' %%(levelname)s: %%(message)s'
1203
% server_settings["servicename"]))
2455
1205
# Parse config file with clients
2456
client_config = configparser.SafeConfigParser(Client
1206
client_defaults = { "timeout": "1h",
1208
"checker": "fping -q -- %%(host)s",
1211
client_config = ConfigParser.SafeConfigParser(client_defaults)
2458
1212
client_config.read(os.path.join(server_settings["configdir"],
2459
1213
"clients.conf"))
2461
1215
global mandos_dbus_service
2462
1216
mandos_dbus_service = None
2465
if server_settings["socket"] != "":
2466
socketfd = server_settings["socket"]
2467
tcp_server = MandosServer((server_settings["address"],
2468
server_settings["port"]),
2470
interface=(server_settings["interface"]
2474
server_settings["priority"],
2478
pidfilename = "/run/mandos.pid"
2479
if not os.path.isdir("/run/."):
2480
pidfilename = "/var/run/mandos.pid"
2483
pidfile = open(pidfilename, "w")
2484
except IOError as e:
2485
logger.error("Could not open file %r", pidfilename,
1219
tcp_server = IPv6_TCPServer((server_settings["address"],
1220
server_settings["port"]),
1223
server_settings["interface"],
1227
server_settings["priority"],
1229
pidfilename = "/var/run/mandos.pid"
1231
pidfile = open(pidfilename, "w")
1233
logger.error("Could not open file %r", pidfilename)
2488
for name in ("_mandos", "mandos", "nobody"):
1236
uid = pwd.getpwnam("_mandos").pw_uid
1237
gid = pwd.getpwnam("_mandos").pw_gid
2490
uid = pwd.getpwnam(name).pw_uid
2491
gid = pwd.getpwnam(name).pw_gid
1240
uid = pwd.getpwnam("mandos").pw_uid
1241
gid = pwd.getpwnam("mandos").pw_gid
2493
1242
except KeyError:
1244
uid = pwd.getpwnam("nobody").pw_uid
1245
gid = pwd.getpwnam("nogroup").pw_gid
2501
except OSError as error:
2502
if error.errno != errno.EPERM:
1252
except OSError, error:
1253
if error[0] != errno.EPERM:
1256
# Enable all possible GnuTLS debugging
2506
# Enable all possible GnuTLS debugging
2508
1258
# "Use a log level over 10 to enable all debugging options."
2509
1259
# - GnuTLS manual
2510
1260
gnutls.library.functions.gnutls_global_set_log_level(11)
2516
1266
(gnutls.library.functions
2517
1267
.gnutls_global_set_log_function(debug_gnutls))
2519
# Redirect stdin so all checkers get /dev/null
2520
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2521
os.dup2(null, sys.stdin.fileno())
2525
# Need to fork before connecting to D-Bus
2527
# Close all input and output, do double fork, etc.
2530
# multiprocessing will use threads, so before we use gobject we
2531
# need to inform gobject that threads will be used.
2532
gobject.threads_init()
1270
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1271
service = AvahiService(name = server_settings["servicename"],
1272
servicetype = "_mandos._tcp",
1273
protocol = protocol)
1274
if server_settings["interface"]:
1275
service.interface = (if_nametoindex
1276
(server_settings["interface"]))
2534
1278
global main_loop
2535
1281
# From the Avahi example code
2536
DBusGMainLoop(set_as_default=True)
1282
DBusGMainLoop(set_as_default=True )
2537
1283
main_loop = gobject.MainLoop()
2538
1284
bus = dbus.SystemBus()
1285
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
1286
avahi.DBUS_PATH_SERVER),
1287
avahi.DBUS_INTERFACE_SERVER)
2539
1288
# End of Avahi example code
2542
bus_name = dbus.service.BusName("se.recompile.Mandos",
2543
bus, do_not_queue=True)
2544
old_bus_name = (dbus.service.BusName
2545
("se.bsnet.fukt.Mandos", bus,
2547
except dbus.exceptions.NameExistsException as e:
2548
logger.error("Disabling D-Bus:", exc_info=e)
2550
server_settings["use_dbus"] = False
2551
tcp_server.use_dbus = False
2553
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2554
service = AvahiServiceToSyslog(name =
2555
server_settings["servicename"],
2556
servicetype = "_mandos._tcp",
2557
protocol = protocol, bus = bus)
2558
if server_settings["interface"]:
2559
service.interface = (if_nametoindex
2560
(server_settings["interface"]
2563
global multiprocessing_manager
2564
multiprocessing_manager = multiprocessing.Manager()
1290
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
2566
1292
client_class = Client
2568
client_class = functools.partial(ClientDBus, bus = bus)
2570
client_settings = Client.config_parser(client_config)
2571
old_client_settings = {}
2574
# This is used to redirect stdout and stderr for checker processes
2576
wnull = open(os.devnull, "w") # A writable /dev/null
2577
# Only used if server is running in foreground but not in debug
2579
if debug or not foreground:
2582
# Get client data and settings from last running state.
2583
if server_settings["restore"]:
2585
with open(stored_state_path, "rb") as stored_state:
2586
clients_data, old_client_settings = (pickle.load
2588
os.remove(stored_state_path)
2589
except IOError as e:
2590
if e.errno == errno.ENOENT:
2591
logger.warning("Could not load persistent state: {}"
2592
.format(os.strerror(e.errno)))
2594
logger.critical("Could not load persistent state:",
2597
except EOFError as e:
2598
logger.warning("Could not load persistent state: "
2599
"EOFError:", exc_info=e)
2601
with PGPEngine() as pgp:
2602
for client_name, client in clients_data.items():
2603
# Skip removed clients
2604
if client_name not in client_settings:
2607
# Decide which value to use after restoring saved state.
2608
# We have three different values: Old config file,
2609
# new config file, and saved state.
2610
# New config value takes precedence if it differs from old
2611
# config value, otherwise use saved state.
2612
for name, value in client_settings[client_name].items():
2614
# For each value in new config, check if it
2615
# differs from the old config value (Except for
2616
# the "secret" attribute)
2617
if (name != "secret" and
2618
value != old_client_settings[client_name]
2620
client[name] = value
2624
# Clients who has passed its expire date can still be
2625
# enabled if its last checker was successful. Clients
2626
# whose checker succeeded before we stored its state is
2627
# assumed to have successfully run all checkers during
2629
if client["enabled"]:
2630
if datetime.datetime.utcnow() >= client["expires"]:
2631
if not client["last_checked_ok"]:
2633
"disabling client {} - Client never "
2634
"performed a successful checker"
2635
.format(client_name))
2636
client["enabled"] = False
2637
elif client["last_checker_status"] != 0:
2639
"disabling client {} - Client last"
2640
" checker failed with error code {}"
2641
.format(client_name,
2642
client["last_checker_status"]))
2643
client["enabled"] = False
2645
client["expires"] = (datetime.datetime
2647
+ client["timeout"])
2648
logger.debug("Last checker succeeded,"
2649
" keeping {} enabled"
2650
.format(client_name))
2652
client["secret"] = (
2653
pgp.decrypt(client["encrypted_secret"],
2654
client_settings[client_name]
2657
# If decryption fails, we use secret from new settings
2658
logger.debug("Failed to decrypt {} old secret"
2659
.format(client_name))
2660
client["secret"] = (
2661
client_settings[client_name]["secret"])
2663
# Add/remove clients based on new changes made to config
2664
for client_name in (set(old_client_settings)
2665
- set(client_settings)):
2666
del clients_data[client_name]
2667
for client_name in (set(client_settings)
2668
- set(old_client_settings)):
2669
clients_data[client_name] = client_settings[client_name]
2671
# Create all client objects
2672
for client_name, client in clients_data.items():
2673
tcp_server.clients[client_name] = client_class(
2674
name = client_name, settings = client,
2675
server_settings = server_settings)
2677
if not tcp_server.clients:
2678
logger.warning("No clients defined")
2681
if pidfile is not None:
2685
pidfile.write("{}\n".format(pid).encode("utf-8"))
2687
logger.error("Could not write to file %r with PID %d",
1294
client_class = ClientDBus
1296
client_class(name = section,
1297
config= dict(client_config.items(section)))
1298
for section in client_config.sections()))
1300
logger.warning(u"No clients defined")
1303
# Redirect stdin so all checkers get /dev/null
1304
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1305
os.dup2(null, sys.stdin.fileno())
1309
# No console logging
1310
logger.removeHandler(console)
1311
# Close all input and output, do double fork, etc.
1315
with closing(pidfile):
1317
pidfile.write(str(pid) + "\n")
1320
logger.error(u"Could not write to file %r with PID %d",
1323
# "pidfile" was never created
1328
"Cleanup function; run on exit"
1330
# From the Avahi example code
1331
if not group is None:
1334
# End of Avahi example code
1337
client = clients.pop()
1338
client.disable_hook = None
1341
atexit.register(cleanup)
1344
signal.signal(signal.SIGINT, signal.SIG_IGN)
2692
1345
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2693
1346
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2696
@alternate_dbus_interfaces({"se.recompile.Mandos":
2697
"se.bsnet.fukt.Mandos"})
2698
class MandosDBusService(DBusObjectWithProperties):
1349
class MandosDBusService(dbus.service.Object):
2699
1350
"""A D-Bus proxy object"""
2700
1351
def __init__(self):
2701
1352
dbus.service.Object.__init__(self, bus, "/")
2702
_interface = "se.recompile.Mandos"
2704
@dbus_interface_annotations(_interface)
2706
return { "org.freedesktop.DBus.Property"
2707
".EmitsChangedSignal":
2710
@dbus.service.signal(_interface, signature="o")
2711
def ClientAdded(self, objpath):
1353
_interface = u"se.bsnet.fukt.Mandos"
1355
@dbus.service.signal(_interface, signature="oa{sv}")
1356
def ClientAdded(self, objpath, properties):
2715
@dbus.service.signal(_interface, signature="ss")
2716
def ClientNotFound(self, fingerprint, address):
1360
@dbus.service.signal(_interface, signature="s")
1361
def ClientNotFound(self, fingerprint):
2725
1370
@dbus.service.method(_interface, out_signature="ao")
2726
1371
def GetAllClients(self):
2728
return dbus.Array(c.dbus_object_path
2730
tcp_server.clients.itervalues())
1373
return dbus.Array(c.dbus_object_path for c in clients)
2732
@dbus.service.method(_interface,
2733
out_signature="a{oa{sv}}")
1375
@dbus.service.method(_interface, out_signature="a{oa{sv}}")
2734
1376
def GetAllClientsWithProperties(self):
2736
1378
return dbus.Dictionary(
2737
{ c.dbus_object_path: c.GetAll("")
2738
for c in tcp_server.clients.itervalues() },
1379
((c.dbus_object_path, c.GetAllProperties())
2739
1381
signature="oa{sv}")
2741
1383
@dbus.service.method(_interface, in_signature="o")
2742
1384
def RemoveClient(self, object_path):
2744
for c in tcp_server.clients.itervalues():
2745
1387
if c.dbus_object_path == object_path:
2746
del tcp_server.clients[c.name]
2747
1389
c.remove_from_connection()
2748
1390
# Don't signal anything except ClientRemoved
2749
c.disable(quiet=True)
1391
c.disable(signal=False)
2750
1392
# Emit D-Bus signal
2751
1393
self.ClientRemoved(object_path, c.name)
2753
raise KeyError(object_path)
2757
1399
mandos_dbus_service = MandosDBusService()
2760
"Cleanup function; run on exit"
2764
multiprocessing.active_children()
2766
if not (tcp_server.clients or client_settings):
2769
# Store client before exiting. Secrets are encrypted with key
2770
# based on what config file has. If config file is
2771
# removed/edited, old secret will thus be unrecovable.
2773
with PGPEngine() as pgp:
2774
for client in tcp_server.clients.itervalues():
2775
key = client_settings[client.name]["secret"]
2776
client.encrypted_secret = pgp.encrypt(client.secret,
2780
# A list of attributes that can not be pickled
2782
exclude = { "bus", "changedstate", "secret",
2783
"checker", "server_settings" }
2784
for name, typ in (inspect.getmembers
2785
(dbus.service.Object)):
2788
client_dict["encrypted_secret"] = (client
2790
for attr in client.client_structure:
2791
if attr not in exclude:
2792
client_dict[attr] = getattr(client, attr)
2794
clients[client.name] = client_dict
2795
del client_settings[client.name]["secret"]
2798
with (tempfile.NamedTemporaryFile
2799
(mode='wb', suffix=".pickle", prefix='clients-',
2800
dir=os.path.dirname(stored_state_path),
2801
delete=False)) as stored_state:
2802
pickle.dump((clients, client_settings), stored_state)
2803
tempname=stored_state.name
2804
os.rename(tempname, stored_state_path)
2805
except (IOError, OSError) as e:
2811
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
2812
logger.warning("Could not save persistent state: {}"
2813
.format(os.strerror(e.errno)))
2815
logger.warning("Could not save persistent state:",
2819
# Delete all clients, and settings from config
2820
while tcp_server.clients:
2821
name, client = tcp_server.clients.popitem()
2823
client.remove_from_connection()
2824
# Don't signal anything except ClientRemoved
2825
client.disable(quiet=True)
2828
mandos_dbus_service.ClientRemoved(client
2831
client_settings.clear()
2833
atexit.register(cleanup)
2835
for client in tcp_server.clients.itervalues():
1401
for client in clients:
2837
1403
# Emit D-Bus signal
2838
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2839
# Need to initiate checking of clients
2841
client.init_checker()
1404
mandos_dbus_service.ClientAdded(client.dbus_object_path,
1405
client.GetAllProperties())
2843
1408
tcp_server.enable()
2844
1409
tcp_server.server_activate()
2846
1411
# Find out what port we got
2848
service.port = tcp_server.socket.getsockname()[1]
1412
service.port = tcp_server.socket.getsockname()[1]
2850
logger.info("Now listening on address %r, port %d,"
2851
" flowinfo %d, scope_id %d",
2852
*tcp_server.socket.getsockname())
1414
logger.info(u"Now listening on address %r, port %d,"
1415
" flowinfo %d, scope_id %d"
1416
% tcp_server.socket.getsockname())
2854
logger.info("Now listening on address %r, port %d",
2855
*tcp_server.socket.getsockname())
1418
logger.info(u"Now listening on address %r, port %d"
1419
% tcp_server.socket.getsockname())
2857
1421
#service.interface = tcp_server.socket.getsockname()[3]
2861
# From the Avahi example code
2864
except dbus.exceptions.DBusException as error:
2865
logger.critical("D-Bus Exception", exc_info=error)
2868
# End of Avahi example code
1424
# From the Avahi example code
1425
server.connect_to_signal("StateChanged", server_state_changed)
1427
server_state_changed(server.GetState())
1428
except dbus.exceptions.DBusException, error:
1429
logger.critical(u"DBusException: %s", error)
1431
# End of Avahi example code
2870
1433
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2871
1434
lambda *args, **kwargs:
2872
1435
(tcp_server.handle_request
2873
1436
(*args[2:], **kwargs) or True))
2875
logger.debug("Starting main loop")
1438
logger.debug(u"Starting main loop")
2876
1439
main_loop.run()
2877
except AvahiError as error:
2878
logger.critical("Avahi Error", exc_info=error)
1440
except AvahiError, error:
1441
logger.critical(u"AvahiError: %s", error)
2881
1443
except KeyboardInterrupt:
2883
print("", file=sys.stderr)
2884
1446
logger.debug("Server received KeyboardInterrupt")
2885
1447
logger.debug("Server exiting")
2886
# Must run before the D-Bus bus name gets deregistered
2889
1449
if __name__ == '__main__':