84
101
except ImportError:
85
102
SO_BINDTODEVICE = None
90
stored_state_path = "/var/lib/mandos/clients.pickle"
92
#logger = logging.getLogger('mandos')
93
logger = logging.Logger('mandos')
94
syslogger = (logging.handlers.SysLogHandler
95
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
96
address = str("/dev/log")))
97
syslogger.setFormatter(logging.Formatter
98
('Mandos [%(process)d]: %(levelname)s:'
100
logger.addHandler(syslogger)
102
console = logging.StreamHandler()
103
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
106
logger.addHandler(console)
104
if sys.version_info.major == 2:
108
stored_state_file = "clients.pickle"
110
logger = logging.getLogger()
114
if_nametoindex = ctypes.cdll.LoadLibrary(
115
ctypes.util.find_library("c")).if_nametoindex
116
except (OSError, AttributeError):
118
def if_nametoindex(interface):
119
"Get an interface index the hard way, i.e. using fcntl()"
120
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
121
with contextlib.closing(socket.socket()) as s:
122
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
123
struct.pack(b"16s16x", interface))
124
interface_index = struct.unpack("I", ifreq[16:20])[0]
125
return interface_index
128
def initlogger(debug, level=logging.WARNING):
129
"""init logger and add loglevel"""
132
syslogger = (logging.handlers.SysLogHandler(
133
facility = logging.handlers.SysLogHandler.LOG_DAEMON,
134
address = "/dev/log"))
135
syslogger.setFormatter(logging.Formatter
136
('Mandos [%(process)d]: %(levelname)s:'
138
logger.addHandler(syslogger)
141
console = logging.StreamHandler()
142
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
146
logger.addHandler(console)
147
logger.setLevel(level)
150
class PGPError(Exception):
151
"""Exception if encryption/decryption fails"""
155
class PGPEngine(object):
156
"""A simple class for OpenPGP symmetric encryption & decryption"""
159
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
160
self.gnupgargs = ['--batch',
161
'--home', self.tempdir,
169
def __exit__(self, exc_type, exc_value, traceback):
177
if self.tempdir is not None:
178
# Delete contents of tempdir
179
for root, dirs, files in os.walk(self.tempdir,
181
for filename in files:
182
os.remove(os.path.join(root, filename))
184
os.rmdir(os.path.join(root, dirname))
186
os.rmdir(self.tempdir)
189
def password_encode(self, password):
190
# Passphrase can not be empty and can not contain newlines or
191
# NUL bytes. So we prefix it and hex encode it.
192
encoded = b"mandos" + binascii.hexlify(password)
193
if len(encoded) > 2048:
194
# GnuPG can't handle long passwords, so encode differently
195
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
196
.replace(b"\n", b"\\n")
197
.replace(b"\0", b"\\x00"))
200
def encrypt(self, data, password):
201
passphrase = self.password_encode(password)
202
with tempfile.NamedTemporaryFile(
203
dir=self.tempdir) as passfile:
204
passfile.write(passphrase)
206
proc = subprocess.Popen(['gpg', '--symmetric',
210
stdin = subprocess.PIPE,
211
stdout = subprocess.PIPE,
212
stderr = subprocess.PIPE)
213
ciphertext, err = proc.communicate(input = data)
214
if proc.returncode != 0:
218
def decrypt(self, data, password):
219
passphrase = self.password_encode(password)
220
with tempfile.NamedTemporaryFile(
221
dir = self.tempdir) as passfile:
222
passfile.write(passphrase)
224
proc = subprocess.Popen(['gpg', '--decrypt',
228
stdin = subprocess.PIPE,
229
stdout = subprocess.PIPE,
230
stderr = subprocess.PIPE)
231
decrypted_plaintext, err = proc.communicate(input = data)
232
if proc.returncode != 0:
234
return decrypted_plaintext
108
237
class AvahiError(Exception):
109
238
def __init__(self, value, *args, **kwargs):
110
239
self.value = value
111
super(AvahiError, self).__init__(value, *args, **kwargs)
112
def __unicode__(self):
113
return unicode(repr(self.value))
240
return super(AvahiError, self).__init__(value, *args,
115
244
class AvahiServiceError(AvahiError):
118
248
class AvahiGroupError(AvahiError):
304
473
interval: datetime.timedelta(); How often to start a new checker
305
474
last_approval_request: datetime.datetime(); (UTC) or None
306
475
last_checked_ok: datetime.datetime(); (UTC) or None
307
Last_checker_status: integer between 0 and 255 reflecting exit status
308
of last checker. -1 reflect crashed checker.
309
last_enabled: datetime.datetime(); (UTC)
476
last_checker_status: integer between 0 and 255 reflecting exit
477
status of last checker. -1 reflects crashed
478
checker, -2 means no checker completed yet.
479
last_checker_signal: The signal which killed the last checker, if
480
last_checker_status is -1
481
last_enabled: datetime.datetime(); (UTC) or None
310
482
name: string; from the config file, used in log messages and
311
483
D-Bus identifiers
312
484
secret: bytestring; sent verbatim (over TLS) to client
313
485
timeout: datetime.timedelta(); How long from last_checked_ok
314
486
until this client is disabled
315
extended_timeout: extra long timeout when password has been sent
487
extended_timeout: extra long timeout when secret has been sent
316
488
runtime_expansions: Allowed attributes for runtime expansion.
317
489
expires: datetime.datetime(); time (UTC) when a client will be
318
490
disabled, or None
491
server_settings: The server_settings dict from main()
321
494
runtime_expansions = ("approval_delay", "approval_duration",
322
"created", "enabled", "fingerprint",
323
"host", "interval", "last_checked_ok",
495
"created", "enabled", "expires",
496
"fingerprint", "host", "interval",
497
"last_approval_request", "last_checked_ok",
324
498
"last_enabled", "name", "timeout")
326
def timeout_milliseconds(self):
327
"Return the 'timeout' attribute in milliseconds"
328
return _timedelta_to_milliseconds(self.timeout)
330
def extended_timeout_milliseconds(self):
331
"Return the 'extended_timeout' attribute in milliseconds"
332
return _timedelta_to_milliseconds(self.extended_timeout)
334
def interval_milliseconds(self):
335
"Return the 'interval' attribute in milliseconds"
336
return _timedelta_to_milliseconds(self.interval)
338
def approval_delay_milliseconds(self):
339
return _timedelta_to_milliseconds(self.approval_delay)
341
def __init__(self, name = None, config=None):
342
"""Note: the 'checker' key in 'config' sets the
343
'checker_command' attribute and *not* the 'checker'
501
"extended_timeout": "PT15M",
503
"checker": "fping -q -- %%(host)s",
505
"approval_delay": "PT0S",
506
"approval_duration": "PT1S",
507
"approved_by_default": "True",
512
def config_parser(config):
513
"""Construct a new dict of client settings of this form:
514
{ client_name: {setting_name: value, ...}, ...}
515
with exceptions for any special settings as defined above.
516
NOTE: Must be a pure function. Must return the same result
517
value given the same arguments.
520
for client_name in config.sections():
521
section = dict(config.items(client_name))
522
client = settings[client_name] = {}
524
client["host"] = section["host"]
525
# Reformat values from string types to Python types
526
client["approved_by_default"] = config.getboolean(
527
client_name, "approved_by_default")
528
client["enabled"] = config.getboolean(client_name,
531
# Uppercase and remove spaces from fingerprint for later
532
# comparison purposes with return value from the
533
# fingerprint() function
534
client["fingerprint"] = (section["fingerprint"].upper()
536
if "secret" in section:
537
client["secret"] = section["secret"].decode("base64")
538
elif "secfile" in section:
539
with open(os.path.expanduser(os.path.expandvars
540
(section["secfile"])),
542
client["secret"] = secfile.read()
544
raise TypeError("No secret or secfile for section {}"
546
client["timeout"] = string_to_delta(section["timeout"])
547
client["extended_timeout"] = string_to_delta(
548
section["extended_timeout"])
549
client["interval"] = string_to_delta(section["interval"])
550
client["approval_delay"] = string_to_delta(
551
section["approval_delay"])
552
client["approval_duration"] = string_to_delta(
553
section["approval_duration"])
554
client["checker_command"] = section["checker"]
555
client["last_approval_request"] = None
556
client["last_checked_ok"] = None
557
client["last_checker_status"] = -2
561
def __init__(self, settings, name = None, server_settings=None):
563
if server_settings is None:
565
self.server_settings = server_settings
566
# adding all client settings
567
for setting, value in settings.items():
568
setattr(self, setting, value)
571
if not hasattr(self, "last_enabled"):
572
self.last_enabled = datetime.datetime.utcnow()
573
if not hasattr(self, "expires"):
574
self.expires = (datetime.datetime.utcnow()
577
self.last_enabled = None
348
580
logger.debug("Creating client %r", self.name)
349
# Uppercase and remove spaces from fingerprint for later
350
# comparison purposes with return value from the fingerprint()
352
self.fingerprint = (config["fingerprint"].upper()
354
581
logger.debug(" Fingerprint: %s", self.fingerprint)
355
if "secret" in config:
356
self.secret = config["secret"].decode("base64")
357
elif "secfile" in config:
358
with open(os.path.expanduser(os.path.expandvars
359
(config["secfile"])),
361
self.secret = secfile.read()
363
raise TypeError("No secret or secfile for client %s"
365
self.host = config.get("host", "")
366
self.created = datetime.datetime.utcnow()
368
self.last_approval_request = None
369
self.last_enabled = datetime.datetime.utcnow()
370
self.last_checked_ok = None
371
self.last_checker_status = 0
372
self.timeout = string_to_delta(config["timeout"])
373
self.extended_timeout = string_to_delta(config
374
["extended_timeout"])
375
self.interval = string_to_delta(config["interval"])
582
self.created = settings.get("created",
583
datetime.datetime.utcnow())
585
# attributes specific for this server instance
376
586
self.checker = None
377
587
self.checker_initiator_tag = None
378
588
self.disable_initiator_tag = None
379
self.expires = datetime.datetime.utcnow() + self.timeout
380
589
self.checker_callback_tag = None
381
self.checker_command = config["checker"]
382
590
self.current_checker_command = None
383
self._approved = None
384
self.approved_by_default = config.get("approved_by_default",
386
592
self.approvals_pending = 0
387
self.approval_delay = string_to_delta(
388
config["approval_delay"])
389
self.approval_duration = string_to_delta(
390
config["approval_duration"])
391
self.changedstate = (multiprocessing_manager
392
.Condition(multiprocessing_manager
394
self.client_structure = [attr for attr in self.__dict__.iterkeys() if not attr.startswith("_")]
593
self.changedstate = multiprocessing_manager.Condition(
594
multiprocessing_manager.Lock())
595
self.client_structure = [attr
596
for attr in self.__dict__.iterkeys()
597
if not attr.startswith("_")]
395
598
self.client_structure.append("client_structure")
398
for name, t in inspect.getmembers(type(self),
399
lambda obj: isinstance(obj, property)):
600
for name, t in inspect.getmembers(
601
type(self), lambda obj: isinstance(obj, property)):
400
602
if not name.startswith("_"):
401
603
self.client_structure.append(name)
605
# Send notice to process children that client state has changed
404
606
def send_changedstate(self):
405
self.changedstate.acquire()
406
self.changedstate.notify_all()
407
self.changedstate.release()
607
with self.changedstate:
608
self.changedstate.notify_all()
409
610
def enable(self):
410
611
"""Start this client's checker and timeout hooks"""
411
612
if getattr(self, "enabled", False):
412
613
# Already enabled
414
self.send_changedstate()
415
615
self.expires = datetime.datetime.utcnow() + self.timeout
416
616
self.enabled = True
417
617
self.last_enabled = datetime.datetime.utcnow()
418
618
self.init_checker()
619
self.send_changedstate()
420
621
def disable(self, quiet=True):
421
622
"""Disable this client."""
422
623
if not getattr(self, "enabled", False):
425
self.send_changedstate()
427
626
logger.info("Disabling client %s", self.name)
428
if getattr(self, "disable_initiator_tag", False):
627
if getattr(self, "disable_initiator_tag", None) is not None:
429
628
gobject.source_remove(self.disable_initiator_tag)
430
629
self.disable_initiator_tag = None
431
630
self.expires = None
432
if getattr(self, "checker_initiator_tag", False):
631
if getattr(self, "checker_initiator_tag", None) is not None:
433
632
gobject.source_remove(self.checker_initiator_tag)
434
633
self.checker_initiator_tag = None
435
634
self.stop_checker()
436
635
self.enabled = False
637
self.send_changedstate()
437
638
# Do not run this again if called by a gobject.timeout_add
440
641
def __del__(self):
443
644
def init_checker(self):
444
645
# Schedule a new checker to be started an 'interval' from now,
445
646
# and every interval from then on.
446
self.checker_initiator_tag = (gobject.timeout_add
447
(self.interval_milliseconds(),
647
if self.checker_initiator_tag is not None:
648
gobject.source_remove(self.checker_initiator_tag)
649
self.checker_initiator_tag = gobject.timeout_add(
650
int(self.interval.total_seconds() * 1000),
449
652
# Schedule a disable() when 'timeout' has passed
450
self.disable_initiator_tag = (gobject.timeout_add
451
(self.timeout_milliseconds(),
653
if self.disable_initiator_tag is not None:
654
gobject.source_remove(self.disable_initiator_tag)
655
self.disable_initiator_tag = gobject.timeout_add(
656
int(self.timeout.total_seconds() * 1000), self.disable)
453
657
# Also start a new checker *right now*.
454
658
self.start_checker()
457
def checker_callback(self, pid, condition, command):
660
def checker_callback(self, source, condition, connection,
458
662
"""The checker has completed, so take appropriate actions."""
459
663
self.checker_callback_tag = None
460
664
self.checker = None
461
if os.WIFEXITED(condition):
462
self.last_checker_status = os.WEXITSTATUS(condition)
665
# Read return code from connection (see call_pipe)
666
returncode = connection.recv()
670
self.last_checker_status = returncode
671
self.last_checker_signal = None
463
672
if self.last_checker_status == 0:
464
673
logger.info("Checker for %(name)s succeeded",
466
675
self.checked_ok()
468
logger.info("Checker for %(name)s failed",
677
logger.info("Checker for %(name)s failed", vars(self))
471
679
self.last_checker_status = -1
680
self.last_checker_signal = -returncode
472
681
logger.warning("Checker for %(name)s crashed?",
475
def checked_ok(self, timeout=None):
476
"""Bump up the timeout for this client.
478
This should only be called when the client has been seen,
685
def checked_ok(self):
686
"""Assert that the client has been seen, alive and well."""
687
self.last_checked_ok = datetime.datetime.utcnow()
688
self.last_checker_status = 0
689
self.last_checker_signal = None
692
def bump_timeout(self, timeout=None):
693
"""Bump up the timeout for this client."""
481
694
if timeout is None:
482
695
timeout = self.timeout
483
self.last_checked_ok = datetime.datetime.utcnow()
484
696
if self.disable_initiator_tag is not None:
485
697
gobject.source_remove(self.disable_initiator_tag)
698
self.disable_initiator_tag = None
486
699
if getattr(self, "enabled", False):
487
self.disable_initiator_tag = (gobject.timeout_add
488
(_timedelta_to_milliseconds
489
(timeout), self.disable))
700
self.disable_initiator_tag = gobject.timeout_add(
701
int(timeout.total_seconds() * 1000), self.disable)
490
702
self.expires = datetime.datetime.utcnow() + timeout
492
704
def need_approval(self):
498
710
If a checker already exists, leave it running and do
500
712
# The reason for not killing a running checker is that if we
501
# did that, then if a checker (for some reason) started
502
# running slowly and taking more than 'interval' time, the
503
# client would inevitably timeout, since no checker would get
504
# a chance to run to completion. If we instead leave running
713
# did that, and if a checker (for some reason) started running
714
# slowly and taking more than 'interval' time, then the client
715
# would inevitably timeout, since no checker would get a
716
# chance to run to completion. If we instead leave running
505
717
# checkers alone, the checker would have to take more time
506
718
# than 'timeout' for the client to be disabled, which is as it
509
# If a checker exists, make sure it is not a zombie
511
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
512
except (AttributeError, OSError) as error:
513
if (isinstance(error, OSError)
514
and error.errno != errno.ECHILD):
518
logger.warning("Checker was a zombie")
519
gobject.source_remove(self.checker_callback_tag)
520
self.checker_callback(pid, status,
521
self.current_checker_command)
721
if self.checker is not None and not self.checker.is_alive():
722
logger.warning("Checker was not alive; joining")
522
725
# Start a new checker if needed
523
726
if self.checker is None:
727
# Escape attributes for the shell
729
attr: re.escape(str(getattr(self, attr)))
730
for attr in self.runtime_expansions }
525
# In case checker_command has exactly one % operator
526
command = self.checker_command % self.host
528
# Escape attributes for the shell
529
escaped_attrs = dict(
531
re.escape(unicode(str(getattr(self, attr, "")),
535
self.runtime_expansions)
538
command = self.checker_command % escaped_attrs
539
except TypeError as error:
540
logger.error('Could not format string "%s":'
541
' %s', self.checker_command, error)
542
return True # Try again later
732
command = self.checker_command % escaped_attrs
733
except TypeError as error:
734
logger.error('Could not format string "%s"',
735
self.checker_command,
737
return True # Try again later
543
738
self.current_checker_command = command
545
logger.info("Starting checker %r for %s",
547
# We don't need to redirect stdout and stderr, since
548
# in normal mode, that is already done by daemon(),
549
# and in debug mode we don't want to. (Stdin is
550
# always replaced by /dev/null.)
551
self.checker = subprocess.Popen(command,
554
self.checker_callback_tag = (gobject.child_watch_add
556
self.checker_callback,
558
# The checker may have completed before the gobject
559
# watch was added. Check for this.
560
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
562
gobject.source_remove(self.checker_callback_tag)
563
self.checker_callback(pid, status, command)
564
except OSError as error:
565
logger.error("Failed to start subprocess: %s",
739
logger.info("Starting checker %r for %s", command,
741
# We don't need to redirect stdout and stderr, since
742
# in normal mode, that is already done by daemon(),
743
# and in debug mode we don't want to. (Stdin is
744
# always replaced by /dev/null.)
745
# The exception is when not debugging but nevertheless
746
# running in the foreground; use the previously
748
popen_args = { "close_fds": True,
751
if (not self.server_settings["debug"]
752
and self.server_settings["foreground"]):
753
popen_args.update({"stdout": wnull,
755
pipe = multiprocessing.Pipe(duplex = False)
756
self.checker = multiprocessing.Process(
758
args = (pipe[1], subprocess.call, command),
761
self.checker_callback_tag = gobject.io_add_watch(
762
pipe[0].fileno(), gobject.IO_IN,
763
self.checker_callback, pipe[0], command)
567
764
# Re-run this periodically if run by gobject.timeout_add
575
772
if getattr(self, "checker", None) is None:
577
774
logger.debug("Stopping checker for %(name)s", vars(self))
579
os.kill(self.checker.pid, signal.SIGTERM)
581
#if self.checker.poll() is None:
582
# os.kill(self.checker.pid, signal.SIGKILL)
583
except OSError as error:
584
if error.errno != errno.ESRCH: # No such process
775
self.checker.terminate()
586
776
self.checker = None
588
# Encrypts a client secret and stores it in a varible encrypted_secret
589
def encrypt_secret(self, key):
590
# Encryption-key need to be specific size, so we hash inputed key
591
hasheng = hashlib.sha256()
593
encryptionkey = hasheng.digest()
595
# Create validation hash so we know at decryption if it was sucessful
596
hasheng = hashlib.sha256()
597
hasheng.update(self.secret)
598
validationhash = hasheng.digest()
601
iv = os.urandom(Crypto.Cipher.AES.block_size)
602
ciphereng = Crypto.Cipher.AES.new(encryptionkey,
603
Crypto.Cipher.AES.MODE_CFB, iv)
604
ciphertext = ciphereng.encrypt(validationhash+self.secret)
605
self.encrypted_secret = (ciphertext, iv)
607
# Decrypt a encrypted client secret
608
def decrypt_secret(self, key):
609
# Decryption-key need to be specific size, so we hash inputed key
610
hasheng = hashlib.sha256()
612
encryptionkey = hasheng.digest()
614
# Decrypt encrypted secret
615
ciphertext, iv = self.encrypted_secret
616
ciphereng = Crypto.Cipher.AES.new(encryptionkey,
617
Crypto.Cipher.AES.MODE_CFB, iv)
618
plain = ciphereng.decrypt(ciphertext)
620
# Validate decrypted secret to know if it was succesful
621
hasheng = hashlib.sha256()
622
validationhash = plain[:hasheng.digest_size]
623
secret = plain[hasheng.digest_size:]
624
hasheng.update(secret)
626
# if validation fails, we use key as new secret. Otherwhise, we use
627
# the decrypted secret
628
if hasheng.digest() == validationhash:
632
del self.encrypted_secret
635
def dbus_service_property(dbus_interface, signature="v",
636
access="readwrite", byte_arrays=False):
779
def dbus_service_property(dbus_interface,
637
783
"""Decorators for marking methods of a DBusObjectWithProperties to
638
784
become properties on the D-Bus.
767
965
if not hasattr(value, "variant_level"):
966
properties[name] = value
770
all[name] = type(value)(value, variant_level=
771
value.variant_level+1)
772
return dbus.Dictionary(all, signature="sv")
968
properties[name] = type(value)(
969
value, variant_level = value.variant_level + 1)
970
return dbus.Dictionary(properties, signature="sv")
972
@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
973
def PropertiesChanged(self, interface_name, changed_properties,
974
invalidated_properties):
975
"""Standard D-Bus PropertiesChanged() signal, see D-Bus
774
980
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
775
981
out_signature="s",
776
982
path_keyword='object_path',
777
983
connection_keyword='connection')
778
984
def Introspect(self, object_path, connection):
779
"""Standard D-Bus method, overloaded to insert property tags.
985
"""Overloading of standard D-Bus method.
987
Inserts property tags and interface annotation tags.
781
989
xmlstring = dbus.service.Object.Introspect(self, object_path,
784
992
document = xml.dom.minidom.parseString(xmlstring)
785
994
def make_tag(document, name, prop):
786
995
e = document.createElement("property")
787
996
e.setAttribute("name", name)
788
997
e.setAttribute("type", prop._dbus_signature)
789
998
e.setAttribute("access", prop._dbus_access)
791
1001
for if_tag in document.getElementsByTagName("interface"):
792
1003
for tag in (make_tag(document, name, prop)
794
in self._get_all_dbus_properties()
1005
in self._get_all_dbus_things("property")
795
1006
if prop._dbus_interface
796
1007
== if_tag.getAttribute("name")):
797
1008
if_tag.appendChild(tag)
1009
# Add annotation tags
1010
for typ in ("method", "signal", "property"):
1011
for tag in if_tag.getElementsByTagName(typ):
1013
for name, prop in (self.
1014
_get_all_dbus_things(typ)):
1015
if (name == tag.getAttribute("name")
1016
and prop._dbus_interface
1017
== if_tag.getAttribute("name")):
1018
annots.update(getattr(
1019
prop, "_dbus_annotations", {}))
1020
for name, value in annots.items():
1021
ann_tag = document.createElement(
1023
ann_tag.setAttribute("name", name)
1024
ann_tag.setAttribute("value", value)
1025
tag.appendChild(ann_tag)
1026
# Add interface annotation tags
1027
for annotation, value in dict(
1028
itertools.chain.from_iterable(
1029
annotations().items()
1030
for name, annotations
1031
in self._get_all_dbus_things("interface")
1032
if name == if_tag.getAttribute("name")
1034
ann_tag = document.createElement("annotation")
1035
ann_tag.setAttribute("name", annotation)
1036
ann_tag.setAttribute("value", value)
1037
if_tag.appendChild(ann_tag)
798
1038
# Add the names to the return values for the
799
1039
# "org.freedesktop.DBus.Properties" methods
800
1040
if (if_tag.getAttribute("name")
815
1055
except (AttributeError, xml.dom.DOMException,
816
1056
xml.parsers.expat.ExpatError) as error:
817
1057
logger.error("Failed to override Introspection method",
819
1059
return xmlstring
822
def datetime_to_dbus (dt, variant_level=0):
1062
def datetime_to_dbus(dt, variant_level=0):
823
1063
"""Convert a UTC datetime.datetime() to a D-Bus type."""
825
1065
return dbus.String("", variant_level = variant_level)
826
return dbus.String(dt.isoformat(),
827
variant_level=variant_level)
829
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
831
"""Applied to an empty subclass of a D-Bus object, this metaclass
832
will add additional D-Bus attributes matching a certain pattern.
1066
return dbus.String(dt.isoformat(), variant_level=variant_level)
1069
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1070
"""A class decorator; applied to a subclass of
1071
dbus.service.Object, it will add alternate D-Bus attributes with
1072
interface names according to the "alt_interface_names" mapping.
1075
@alternate_dbus_interfaces({"org.example.Interface":
1076
"net.example.AlternateInterface"})
1077
class SampleDBusObject(dbus.service.Object):
1078
@dbus.service.method("org.example.Interface")
1079
def SampleDBusMethod():
1082
The above "SampleDBusMethod" on "SampleDBusObject" will be
1083
reachable via two interfaces: "org.example.Interface" and
1084
"net.example.AlternateInterface", the latter of which will have
1085
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1086
"true", unless "deprecate" is passed with a False value.
1088
This works for methods and signals, and also for D-Bus properties
1089
(from DBusObjectWithProperties) and interfaces (from the
1090
dbus_interface_annotations decorator).
834
def __new__(mcs, name, bases, attr):
835
# Go through all the base classes which could have D-Bus
836
# methods, signals, or properties in them
837
for base in (b for b in bases
838
if issubclass(b, dbus.service.Object)):
839
# Go though all attributes of the base class
840
for attrname, attribute in inspect.getmembers(base):
1094
for orig_interface_name, alt_interface_name in (
1095
alt_interface_names.items()):
1097
interface_names = set()
1098
# Go though all attributes of the class
1099
for attrname, attribute in inspect.getmembers(cls):
841
1100
# Ignore non-D-Bus attributes, and D-Bus attributes
842
1101
# with the wrong interface name
843
1102
if (not hasattr(attribute, "_dbus_interface")
844
or not attribute._dbus_interface
845
.startswith("se.recompile.Mandos")):
1103
or not attribute._dbus_interface.startswith(
1104
orig_interface_name)):
847
1106
# Create an alternate D-Bus interface name based on
848
1107
# the current name
849
alt_interface = (attribute._dbus_interface
850
.replace("se.recompile.Mandos",
851
"se.bsnet.fukt.Mandos"))
1108
alt_interface = attribute._dbus_interface.replace(
1109
orig_interface_name, alt_interface_name)
1110
interface_names.add(alt_interface)
852
1111
# Is this a D-Bus signal?
853
1112
if getattr(attribute, "_dbus_is_signal", False):
854
# Extract the original non-method function by
856
nonmethod_func = (dict(
1113
if sys.version_info.major == 2:
1114
# Extract the original non-method undecorated
1115
# function by black magic
1116
nonmethod_func = (dict(
857
1117
zip(attribute.func_code.co_freevars,
858
attribute.__closure__))["func"]
1118
attribute.__closure__))
1119
["func"].cell_contents)
1121
nonmethod_func = attribute
860
1122
# Create a new, but exactly alike, function
861
1123
# object, and decorate it to be a new D-Bus signal
862
1124
# with the alternate D-Bus interface name
863
new_function = (dbus.service.signal
865
attribute._dbus_signature)
867
nonmethod_func.func_code,
868
nonmethod_func.func_globals,
869
nonmethod_func.func_name,
870
nonmethod_func.func_defaults,
871
nonmethod_func.func_closure)))
1125
if sys.version_info.major == 2:
1126
new_function = types.FunctionType(
1127
nonmethod_func.func_code,
1128
nonmethod_func.func_globals,
1129
nonmethod_func.func_name,
1130
nonmethod_func.func_defaults,
1131
nonmethod_func.func_closure)
1133
new_function = types.FunctionType(
1134
nonmethod_func.__code__,
1135
nonmethod_func.__globals__,
1136
nonmethod_func.__name__,
1137
nonmethod_func.__defaults__,
1138
nonmethod_func.__closure__)
1139
new_function = (dbus.service.signal(
1141
attribute._dbus_signature)(new_function))
1142
# Copy annotations, if any
1144
new_function._dbus_annotations = dict(
1145
attribute._dbus_annotations)
1146
except AttributeError:
872
1148
# Define a creator of a function to call both the
873
# old and new functions, so both the old and new
874
# signals gets sent when the function is called
1149
# original and alternate functions, so both the
1150
# original and alternate signals gets sent when
1151
# the function is called
875
1152
def fixscope(func1, func2):
876
1153
"""This function is a scope container to pass
877
1154
func1 and func2 to the "call_both" function
878
1155
outside of its arguments"""
879
1157
def call_both(*args, **kwargs):
880
1158
"""This function will emit two D-Bus
881
1159
signals by calling func1 and func2"""
882
1160
func1(*args, **kwargs)
883
1161
func2(*args, **kwargs)
884
1163
return call_both
885
1164
# Create the "call_both" function and add it to
887
attr[attrname] = fixscope(attribute,
1166
attr[attrname] = fixscope(attribute, new_function)
889
1167
# Is this a D-Bus method?
890
1168
elif getattr(attribute, "_dbus_is_method", False):
891
1169
# Create a new, but exactly alike, function
892
1170
# object. Decorate it to be a new D-Bus method
893
1171
# with the alternate D-Bus interface name. Add it
895
attr[attrname] = (dbus.service.method
897
attribute._dbus_in_signature,
898
attribute._dbus_out_signature)
900
(attribute.func_code,
901
attribute.func_globals,
903
attribute.func_defaults,
904
attribute.func_closure)))
1174
dbus.service.method(
1176
attribute._dbus_in_signature,
1177
attribute._dbus_out_signature)
1178
(types.FunctionType(attribute.func_code,
1179
attribute.func_globals,
1180
attribute.func_name,
1181
attribute.func_defaults,
1182
attribute.func_closure)))
1183
# Copy annotations, if any
1185
attr[attrname]._dbus_annotations = dict(
1186
attribute._dbus_annotations)
1187
except AttributeError:
905
1189
# Is this a D-Bus property?
906
1190
elif getattr(attribute, "_dbus_is_property", False):
907
1191
# Create a new, but exactly alike, function
908
1192
# object, and decorate it to be a new D-Bus
909
1193
# property with the alternate D-Bus interface
910
1194
# name. Add it to the class.
911
attr[attrname] = (dbus_service_property
913
attribute._dbus_signature,
914
attribute._dbus_access,
916
._dbus_get_args_options
919
(attribute.func_code,
920
attribute.func_globals,
922
attribute.func_defaults,
923
attribute.func_closure)))
924
return type.__new__(mcs, name, bases, attr)
1195
attr[attrname] = (dbus_service_property(
1196
alt_interface, attribute._dbus_signature,
1197
attribute._dbus_access,
1198
attribute._dbus_get_args_options
1200
(types.FunctionType(
1201
attribute.func_code,
1202
attribute.func_globals,
1203
attribute.func_name,
1204
attribute.func_defaults,
1205
attribute.func_closure)))
1206
# Copy annotations, if any
1208
attr[attrname]._dbus_annotations = dict(
1209
attribute._dbus_annotations)
1210
except AttributeError:
1212
# Is this a D-Bus interface?
1213
elif getattr(attribute, "_dbus_is_interface", False):
1214
# Create a new, but exactly alike, function
1215
# object. Decorate it to be a new D-Bus interface
1216
# with the alternate D-Bus interface name. Add it
1219
dbus_interface_annotations(alt_interface)
1220
(types.FunctionType(attribute.func_code,
1221
attribute.func_globals,
1222
attribute.func_name,
1223
attribute.func_defaults,
1224
attribute.func_closure)))
1226
# Deprecate all alternate interfaces
1227
iname="_AlternateDBusNames_interface_annotation{}"
1228
for interface_name in interface_names:
1230
@dbus_interface_annotations(interface_name)
1232
return { "org.freedesktop.DBus.Deprecated":
1234
# Find an unused name
1235
for aname in (iname.format(i)
1236
for i in itertools.count()):
1237
if aname not in attr:
1241
# Replace the class with a new subclass of it with
1242
# methods, signals, etc. as created above.
1243
cls = type(b"{}Alternate".format(cls.__name__),
1250
@alternate_dbus_interfaces({"se.recompile.Mandos":
1251
"se.bsnet.fukt.Mandos"})
926
1252
class ClientDBus(Client, DBusObjectWithProperties):
927
1253
"""A Client class using D-Bus
987
1325
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
988
1326
last_enabled = notifychangeproperty(datetime_to_dbus,
990
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
991
type_func = lambda checker:
1328
checker = notifychangeproperty(
1329
dbus.Boolean, "CheckerRunning",
1330
type_func = lambda checker: checker is not None)
993
1331
last_checked_ok = notifychangeproperty(datetime_to_dbus,
994
1332
"LastCheckedOK")
1333
last_checker_status = notifychangeproperty(dbus.Int16,
1334
"LastCheckerStatus")
995
1335
last_approval_request = notifychangeproperty(
996
1336
datetime_to_dbus, "LastApprovalRequest")
997
1337
approved_by_default = notifychangeproperty(dbus.Boolean,
998
1338
"ApprovedByDefault")
999
approval_delay = notifychangeproperty(dbus.UInt16,
1002
_timedelta_to_milliseconds)
1339
approval_delay = notifychangeproperty(
1340
dbus.UInt64, "ApprovalDelay",
1341
type_func = lambda td: td.total_seconds() * 1000)
1003
1342
approval_duration = notifychangeproperty(
1004
dbus.UInt16, "ApprovalDuration",
1005
type_func = _timedelta_to_milliseconds)
1343
dbus.UInt64, "ApprovalDuration",
1344
type_func = lambda td: td.total_seconds() * 1000)
1006
1345
host = notifychangeproperty(dbus.String, "Host")
1007
timeout = notifychangeproperty(dbus.UInt16, "Timeout",
1009
_timedelta_to_milliseconds)
1346
timeout = notifychangeproperty(
1347
dbus.UInt64, "Timeout",
1348
type_func = lambda td: td.total_seconds() * 1000)
1010
1349
extended_timeout = notifychangeproperty(
1011
dbus.UInt16, "ExtendedTimeout",
1012
type_func = _timedelta_to_milliseconds)
1013
interval = notifychangeproperty(dbus.UInt16,
1016
_timedelta_to_milliseconds)
1350
dbus.UInt64, "ExtendedTimeout",
1351
type_func = lambda td: td.total_seconds() * 1000)
1352
interval = notifychangeproperty(
1353
dbus.UInt64, "Interval",
1354
type_func = lambda td: td.total_seconds() * 1000)
1017
1355
checker_command = notifychangeproperty(dbus.String, "Checker")
1356
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1357
invalidate_only=True)
1019
1359
del notifychangeproperty
1242
1590
return datetime_to_dbus(self.last_approval_request)
1244
1592
# Timeout - property
1245
@dbus_service_property(_interface, signature="t",
1593
@dbus_service_property(_interface,
1246
1595
access="readwrite")
1247
1596
def Timeout_dbus_property(self, value=None):
1248
1597
if value is None: # get
1249
return dbus.UInt64(self.timeout_milliseconds())
1598
return dbus.UInt64(self.timeout.total_seconds() * 1000)
1599
old_timeout = self.timeout
1250
1600
self.timeout = datetime.timedelta(0, 0, 0, value)
1251
if getattr(self, "disable_initiator_tag", None) is None:
1253
# Reschedule timeout
1254
gobject.source_remove(self.disable_initiator_tag)
1255
self.disable_initiator_tag = None
1257
time_to_die = _timedelta_to_milliseconds((self
1262
if time_to_die <= 0:
1263
# The timeout has passed
1266
self.expires = (datetime.datetime.utcnow()
1267
+ datetime.timedelta(milliseconds =
1269
self.disable_initiator_tag = (gobject.timeout_add
1270
(time_to_die, self.disable))
1601
# Reschedule disabling
1603
now = datetime.datetime.utcnow()
1604
self.expires += self.timeout - old_timeout
1605
if self.expires <= now:
1606
# The timeout has passed
1609
if (getattr(self, "disable_initiator_tag", None)
1612
gobject.source_remove(self.disable_initiator_tag)
1613
self.disable_initiator_tag = gobject.timeout_add(
1614
int((self.expires - now).total_seconds() * 1000),
1272
1617
# ExtendedTimeout - property
1273
@dbus_service_property(_interface, signature="t",
1618
@dbus_service_property(_interface,
1274
1620
access="readwrite")
1275
1621
def ExtendedTimeout_dbus_property(self, value=None):
1276
1622
if value is None: # get
1277
return dbus.UInt64(self.extended_timeout_milliseconds())
1623
return dbus.UInt64(self.extended_timeout.total_seconds()
1278
1625
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1280
1627
# Interval - property
1281
@dbus_service_property(_interface, signature="t",
1628
@dbus_service_property(_interface,
1282
1630
access="readwrite")
1283
1631
def Interval_dbus_property(self, value=None):
1284
1632
if value is None: # get
1285
return dbus.UInt64(self.interval_milliseconds())
1633
return dbus.UInt64(self.interval.total_seconds() * 1000)
1286
1634
self.interval = datetime.timedelta(0, 0, 0, value)
1287
1635
if getattr(self, "checker_initiator_tag", None) is None:
1289
# Reschedule checker run
1290
gobject.source_remove(self.checker_initiator_tag)
1291
self.checker_initiator_tag = (gobject.timeout_add
1292
(value, self.start_checker))
1293
self.start_checker() # Start one now, too
1638
# Reschedule checker run
1639
gobject.source_remove(self.checker_initiator_tag)
1640
self.checker_initiator_tag = gobject.timeout_add(
1641
value, self.start_checker)
1642
self.start_checker() # Start one now, too
1295
1644
# Checker - property
1296
@dbus_service_property(_interface, signature="s",
1645
@dbus_service_property(_interface,
1297
1647
access="readwrite")
1298
1648
def Checker_dbus_property(self, value=None):
1299
1649
if value is None: # get
1300
1650
return dbus.String(self.checker_command)
1301
self.checker_command = value
1651
self.checker_command = str(value)
1303
1653
# CheckerRunning - property
1304
@dbus_service_property(_interface, signature="b",
1654
@dbus_service_property(_interface,
1305
1656
access="readwrite")
1306
1657
def CheckerRunning_dbus_property(self, value=None):
1307
1658
if value is None: # get
1533
1883
def fingerprint(openpgp):
1534
1884
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1535
1885
# New GnuTLS "datum" with the OpenPGP public key
1536
datum = (gnutls.library.types
1537
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1540
ctypes.c_uint(len(openpgp))))
1886
datum = gnutls.library.types.gnutls_datum_t(
1887
ctypes.cast(ctypes.c_char_p(openpgp),
1888
ctypes.POINTER(ctypes.c_ubyte)),
1889
ctypes.c_uint(len(openpgp)))
1541
1890
# New empty GnuTLS certificate
1542
1891
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1543
(gnutls.library.functions
1544
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1892
gnutls.library.functions.gnutls_openpgp_crt_init(
1545
1894
# Import the OpenPGP public key into the certificate
1546
(gnutls.library.functions
1547
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1548
gnutls.library.constants
1549
.GNUTLS_OPENPGP_FMT_RAW))
1895
gnutls.library.functions.gnutls_openpgp_crt_import(
1896
crt, ctypes.byref(datum),
1897
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
1550
1898
# Verify the self signature in the key
1551
1899
crtverify = ctypes.c_uint()
1552
(gnutls.library.functions
1553
.gnutls_openpgp_crt_verify_self(crt, 0,
1554
ctypes.byref(crtverify)))
1900
gnutls.library.functions.gnutls_openpgp_crt_verify_self(
1901
crt, 0, ctypes.byref(crtverify))
1555
1902
if crtverify.value != 0:
1556
1903
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1557
raise (gnutls.errors.CertificateSecurityError
1904
raise gnutls.errors.CertificateSecurityError(
1559
1906
# New buffer for the fingerprint
1560
1907
buf = ctypes.create_string_buffer(20)
1561
1908
buf_len = ctypes.c_size_t()
1562
1909
# Get the fingerprint from the certificate into the buffer
1563
(gnutls.library.functions
1564
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1565
ctypes.byref(buf_len)))
1910
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint(
1911
crt, ctypes.byref(buf), ctypes.byref(buf_len))
1566
1912
# Deinit the certificate
1567
1913
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1568
1914
# Convert the buffer to a Python bytestring
1569
1915
fpr = ctypes.string_at(buf, buf_len.value)
1570
1916
# Convert the bytestring to hexadecimal notation
1571
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
1917
hex_fpr = binascii.hexlify(fpr).upper()
1575
1921
class MultiprocessingMixIn(object):
1576
1922
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1577
1924
def sub_process_main(self, request, address):
1579
1926
self.finish_request(request, address)
1581
1928
self.handle_error(request, address)
1582
1929
self.close_request(request)
1584
1931
def process_request(self, request, address):
1585
1932
"""Start a new process to process the request."""
1586
1933
proc = multiprocessing.Process(target = self.sub_process_main,
1934
args = (request, address))
1593
1939
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1594
1940
""" adds a pipe to the MixIn """
1595
1942
def process_request(self, request, client_address):
1596
1943
"""Overrides and wraps the original process_request().
2170
def rfc3339_duration_to_delta(duration):
2171
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2173
>>> rfc3339_duration_to_delta("P7D")
2174
datetime.timedelta(7)
2175
>>> rfc3339_duration_to_delta("PT60S")
2176
datetime.timedelta(0, 60)
2177
>>> rfc3339_duration_to_delta("PT60M")
2178
datetime.timedelta(0, 3600)
2179
>>> rfc3339_duration_to_delta("PT24H")
2180
datetime.timedelta(1)
2181
>>> rfc3339_duration_to_delta("P1W")
2182
datetime.timedelta(7)
2183
>>> rfc3339_duration_to_delta("PT5M30S")
2184
datetime.timedelta(0, 330)
2185
>>> rfc3339_duration_to_delta("P1DT3M20S")
2186
datetime.timedelta(1, 200)
2189
# Parsing an RFC 3339 duration with regular expressions is not
2190
# possible - there would have to be multiple places for the same
2191
# values, like seconds. The current code, while more esoteric, is
2192
# cleaner without depending on a parsing library. If Python had a
2193
# built-in library for parsing we would use it, but we'd like to
2194
# avoid excessive use of external libraries.
2196
# New type for defining tokens, syntax, and semantics all-in-one
2197
Token = collections.namedtuple("Token", (
2198
"regexp", # To match token; if "value" is not None, must have
2199
# a "group" containing digits
2200
"value", # datetime.timedelta or None
2201
"followers")) # Tokens valid after this token
2202
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2203
# the "duration" ABNF definition in RFC 3339, Appendix A.
2204
token_end = Token(re.compile(r"$"), None, frozenset())
2205
token_second = Token(re.compile(r"(\d+)S"),
2206
datetime.timedelta(seconds=1),
2207
frozenset((token_end, )))
2208
token_minute = Token(re.compile(r"(\d+)M"),
2209
datetime.timedelta(minutes=1),
2210
frozenset((token_second, token_end)))
2211
token_hour = Token(re.compile(r"(\d+)H"),
2212
datetime.timedelta(hours=1),
2213
frozenset((token_minute, token_end)))
2214
token_time = Token(re.compile(r"T"),
2216
frozenset((token_hour, token_minute,
2218
token_day = Token(re.compile(r"(\d+)D"),
2219
datetime.timedelta(days=1),
2220
frozenset((token_time, token_end)))
2221
token_month = Token(re.compile(r"(\d+)M"),
2222
datetime.timedelta(weeks=4),
2223
frozenset((token_day, token_end)))
2224
token_year = Token(re.compile(r"(\d+)Y"),
2225
datetime.timedelta(weeks=52),
2226
frozenset((token_month, token_end)))
2227
token_week = Token(re.compile(r"(\d+)W"),
2228
datetime.timedelta(weeks=1),
2229
frozenset((token_end, )))
2230
token_duration = Token(re.compile(r"P"), None,
2231
frozenset((token_year, token_month,
2232
token_day, token_time,
2234
# Define starting values
2235
value = datetime.timedelta() # Value so far
2237
followers = frozenset((token_duration, )) # Following valid tokens
2238
s = duration # String left to parse
2239
# Loop until end token is found
2240
while found_token is not token_end:
2241
# Search for any currently valid tokens
2242
for token in followers:
2243
match = token.regexp.match(s)
2244
if match is not None:
2246
if token.value is not None:
2247
# Value found, parse digits
2248
factor = int(match.group(1), 10)
2249
# Add to value so far
2250
value += factor * token.value
2251
# Strip token from string
2252
s = token.regexp.sub("", s, 1)
2255
# Set valid next tokens
2256
followers = found_token.followers
2259
# No currently valid tokens were found
2260
raise ValueError("Invalid RFC 3339 duration: {!r}"
1795
2266
def string_to_delta(interval):
1796
2267
"""Parse a string and return a datetime.timedelta
1933
2397
"debug": "False",
1935
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2399
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2400
":+SIGN-DSA-SHA256",
1936
2401
"servicename": "Mandos",
1937
2402
"use_dbus": "True",
1938
2403
"use_ipv6": "True",
1939
2404
"debuglevel": "",
2407
"statedir": "/var/lib/mandos",
2408
"foreground": "False",
1942
2412
# Parse config file for server-global settings
1943
2413
server_config = configparser.SafeConfigParser(server_defaults)
1944
2414
del server_defaults
1945
server_config.read(os.path.join(options.configdir,
2415
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1947
2416
# Convert the SafeConfigParser object to a dict
1948
2417
server_settings = server_config.defaults()
1949
2418
# Use the appropriate methods on the non-string config options
1950
for option in ("debug", "use_dbus", "use_ipv6"):
2419
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
1951
2420
server_settings[option] = server_config.getboolean("DEFAULT",
1953
2422
if server_settings["port"]:
1954
2423
server_settings["port"] = server_config.getint("DEFAULT",
2425
if server_settings["socket"]:
2426
server_settings["socket"] = server_config.getint("DEFAULT",
2428
# Later, stdin will, and stdout and stderr might, be dup'ed
2429
# over with an opened os.devnull. But we don't want this to
2430
# happen with a supplied network socket.
2431
if 0 <= server_settings["socket"] <= 2:
2432
server_settings["socket"] = os.dup(server_settings
1956
2434
del server_config
1958
2436
# Override the settings from the config file with command line
1959
2437
# options, if set.
1960
2438
for option in ("interface", "address", "port", "debug",
1961
"priority", "servicename", "configdir",
1962
"use_dbus", "use_ipv6", "debuglevel", "restore"):
2439
"priority", "servicename", "configdir", "use_dbus",
2440
"use_ipv6", "debuglevel", "restore", "statedir",
2441
"socket", "foreground", "zeroconf"):
1963
2442
value = getattr(options, option)
1964
2443
if value is not None:
1965
2444
server_settings[option] = value
1967
2446
# Force all strings to be unicode
1968
2447
for option in server_settings.keys():
1969
if type(server_settings[option]) is str:
1970
server_settings[option] = unicode(server_settings[option])
2448
if isinstance(server_settings[option], bytes):
2449
server_settings[option] = (server_settings[option]
2451
# Force all boolean options to be boolean
2452
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2453
"foreground", "zeroconf"):
2454
server_settings[option] = bool(server_settings[option])
2455
# Debug implies foreground
2456
if server_settings["debug"]:
2457
server_settings["foreground"] = True
1971
2458
# Now we have our good server settings in "server_settings"
1973
2460
##################################################################
2462
if (not server_settings["zeroconf"]
2463
and not (server_settings["port"]
2464
or server_settings["socket"] != "")):
2465
parser.error("Needs port or socket to work without Zeroconf")
1975
2467
# For convenience
1976
2468
debug = server_settings["debug"]
1977
2469
debuglevel = server_settings["debuglevel"]
1978
2470
use_dbus = server_settings["use_dbus"]
1979
2471
use_ipv6 = server_settings["use_ipv6"]
2472
stored_state_path = os.path.join(server_settings["statedir"],
2474
foreground = server_settings["foreground"]
2475
zeroconf = server_settings["zeroconf"]
2478
initlogger(debug, logging.DEBUG)
2483
level = getattr(logging, debuglevel.upper())
2484
initlogger(debug, level)
1981
2486
if server_settings["servicename"] != "Mandos":
1982
syslogger.setFormatter(logging.Formatter
1983
('Mandos (%s) [%%(process)d]:'
1984
' %%(levelname)s: %%(message)s'
1985
% server_settings["servicename"]))
2487
syslogger.setFormatter(
2488
logging.Formatter('Mandos ({}) [%(process)d]:'
2489
' %(levelname)s: %(message)s'.format(
2490
server_settings["servicename"])))
1987
2492
# Parse config file with clients
1988
client_defaults = { "timeout": "5m",
1989
"extended_timeout": "15m",
1991
"checker": "fping -q -- %%(host)s",
1993
"approval_delay": "0s",
1994
"approval_duration": "1s",
1996
client_config = configparser.SafeConfigParser(client_defaults)
2493
client_config = configparser.SafeConfigParser(Client
1997
2495
client_config.read(os.path.join(server_settings["configdir"],
1998
2496
"clients.conf"))
2000
2498
global mandos_dbus_service
2001
2499
mandos_dbus_service = None
2003
tcp_server = MandosServer((server_settings["address"],
2004
server_settings["port"]),
2006
interface=(server_settings["interface"]
2010
server_settings["priority"],
2013
pidfilename = "/var/run/mandos.pid"
2502
if server_settings["socket"] != "":
2503
socketfd = server_settings["socket"]
2504
tcp_server = MandosServer(
2505
(server_settings["address"], server_settings["port"]),
2507
interface=(server_settings["interface"] or None),
2509
gnutls_priority=server_settings["priority"],
2513
pidfilename = "/run/mandos.pid"
2514
if not os.path.isdir("/run/."):
2515
pidfilename = "/var/run/mandos.pid"
2015
pidfile = open(pidfilename, "w")
2017
logger.error("Could not open file %r", pidfilename)
2518
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
2519
except IOError as e:
2520
logger.error("Could not open file %r", pidfilename,
2020
uid = pwd.getpwnam("_mandos").pw_uid
2021
gid = pwd.getpwnam("_mandos").pw_gid
2523
for name in ("_mandos", "mandos", "nobody"):
2024
uid = pwd.getpwnam("mandos").pw_uid
2025
gid = pwd.getpwnam("mandos").pw_gid
2525
uid = pwd.getpwnam(name).pw_uid
2526
gid = pwd.getpwnam(name).pw_gid
2026
2528
except KeyError:
2028
uid = pwd.getpwnam("nobody").pw_uid
2029
gid = pwd.getpwnam("nobody").pw_gid
2036
2536
except OSError as error:
2037
if error[0] != errno.EPERM:
2040
if not debug and not debuglevel:
2041
syslogger.setLevel(logging.WARNING)
2042
console.setLevel(logging.WARNING)
2044
level = getattr(logging, debuglevel.upper())
2045
syslogger.setLevel(level)
2046
console.setLevel(level)
2537
if error.errno != errno.EPERM:
2049
2541
# Enable all possible GnuTLS debugging
2056
2548
def debug_gnutls(level, string):
2057
2549
logger.debug("GnuTLS: %s", string[:-1])
2059
(gnutls.library.functions
2060
.gnutls_global_set_log_function(debug_gnutls))
2551
gnutls.library.functions.gnutls_global_set_log_function(
2062
2554
# Redirect stdin so all checkers get /dev/null
2063
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2555
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2064
2556
os.dup2(null, sys.stdin.fileno())
2068
# No console logging
2069
logger.removeHandler(console)
2071
2560
# Need to fork before connecting to D-Bus
2073
2562
# Close all input and output, do double fork, etc.
2565
# multiprocessing will use threads, so before we use gobject we
2566
# need to inform gobject that threads will be used.
2567
gobject.threads_init()
2076
2569
global main_loop
2077
2570
# From the Avahi example code
2078
DBusGMainLoop(set_as_default=True )
2571
DBusGMainLoop(set_as_default=True)
2079
2572
main_loop = gobject.MainLoop()
2080
2573
bus = dbus.SystemBus()
2081
2574
# End of Avahi example code
2084
2577
bus_name = dbus.service.BusName("se.recompile.Mandos",
2085
bus, do_not_queue=True)
2086
old_bus_name = (dbus.service.BusName
2087
("se.bsnet.fukt.Mandos", bus,
2089
except dbus.exceptions.NameExistsException as e:
2090
logger.error(unicode(e) + ", disabling D-Bus")
2580
old_bus_name = dbus.service.BusName(
2581
"se.bsnet.fukt.Mandos", bus,
2583
except dbus.exceptions.DBusException as e:
2584
logger.error("Disabling D-Bus:", exc_info=e)
2091
2585
use_dbus = False
2092
2586
server_settings["use_dbus"] = False
2093
2587
tcp_server.use_dbus = False
2094
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2095
service = AvahiService(name = server_settings["servicename"],
2096
servicetype = "_mandos._tcp",
2097
protocol = protocol, bus = bus)
2098
if server_settings["interface"]:
2099
service.interface = (if_nametoindex
2100
(str(server_settings["interface"])))
2589
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2590
service = AvahiServiceToSyslog(
2591
name = server_settings["servicename"],
2592
servicetype = "_mandos._tcp",
2593
protocol = protocol,
2595
if server_settings["interface"]:
2596
service.interface = if_nametoindex(
2597
server_settings["interface"].encode("utf-8"))
2102
2599
global multiprocessing_manager
2103
2600
multiprocessing_manager = multiprocessing.Manager()
2105
2602
client_class = Client
2107
client_class = functools.partial(ClientDBusTransitional,
2110
special_settings = {
2111
# Some settings need to be accessd by special methods;
2112
# booleans need .getboolean(), etc. Here is a list of them:
2113
"approved_by_default":
2115
client_config.getboolean(section, "approved_by_default"),
2117
# Construct a new dict of client settings of this form:
2118
# { client_name: {setting_name: value, ...}, ...}
2119
# with exceptions for any special settings as defined above
2120
client_settings = dict((clientname,
2122
(value if setting not in special_settings
2123
else special_settings[setting](clientname)))
2124
for setting, value in client_config.items(clientname)))
2125
for clientname in client_config.sections())
2604
client_class = functools.partial(ClientDBus, bus = bus)
2606
client_settings = Client.config_parser(client_config)
2127
2607
old_client_settings = {}
2610
# This is used to redirect stdout and stderr for checker processes
2612
wnull = open(os.devnull, "w") # A writable /dev/null
2613
# Only used if server is running in foreground but not in debug
2615
if debug or not foreground:
2618
# Get client data and settings from last running state.
2130
2619
if server_settings["restore"]:
2132
2621
with open(stored_state_path, "rb") as stored_state:
2133
clients_data, old_client_settings = pickle.load(stored_state)
2622
clients_data, old_client_settings = pickle.load(
2134
2624
os.remove(stored_state_path)
2135
2625
except IOError as e:
2136
logger.warning("Could not load persistant state: {0}".format(e))
2137
if e.errno != errno.ENOENT:
2626
if e.errno == errno.ENOENT:
2627
logger.warning("Could not load persistent state:"
2628
" {}".format(os.strerror(e.errno)))
2630
logger.critical("Could not load persistent state:",
2140
for client in clients_data:
2141
client_name = client["name"]
2143
# Decide which value to use after restoring saved state.
2144
# We have three different values: Old config file,
2145
# new config file, and saved state.
2146
# New config value takes precedence if it differs from old
2147
# config value, otherwise use saved state.
2148
for name, value in client_settings[client_name].items():
2633
except EOFError as e:
2634
logger.warning("Could not load persistent state: "
2638
with PGPEngine() as pgp:
2639
for client_name, client in clients_data.items():
2640
# Skip removed clients
2641
if client_name not in client_settings:
2644
# Decide which value to use after restoring saved state.
2645
# We have three different values: Old config file,
2646
# new config file, and saved state.
2647
# New config value takes precedence if it differs from old
2648
# config value, otherwise use saved state.
2649
for name, value in client_settings[client_name].items():
2651
# For each value in new config, check if it
2652
# differs from the old config value (Except for
2653
# the "secret" attribute)
2654
if (name != "secret"
2656
old_client_settings[client_name][name])):
2657
client[name] = value
2661
# Clients who has passed its expire date can still be
2662
# enabled if its last checker was successful. A Client
2663
# whose checker succeeded before we stored its state is
2664
# assumed to have successfully run all checkers during
2666
if client["enabled"]:
2667
if datetime.datetime.utcnow() >= client["expires"]:
2668
if not client["last_checked_ok"]:
2670
"disabling client {} - Client never "
2671
"performed a successful checker".format(
2673
client["enabled"] = False
2674
elif client["last_checker_status"] != 0:
2676
"disabling client {} - Client last"
2677
" checker failed with error code"
2680
client["last_checker_status"]))
2681
client["enabled"] = False
2683
client["expires"] = (
2684
datetime.datetime.utcnow()
2685
+ client["timeout"])
2686
logger.debug("Last checker succeeded,"
2687
" keeping {} enabled".format(
2150
# For each value in new config, check if it differs
2151
# from the old config value (Except for the "secret"
2153
if name != "secret" and value != old_client_settings[client_name][name]:
2154
setattr(client, name, value)
2158
# Clients who has passed its expire date, can still be enabled if its
2159
# last checker was sucessful. Clients who checkers failed before we
2160
# stored it state is asumed to had failed checker during downtime.
2161
if client["enabled"] and client["last_checked_ok"]:
2162
if ((datetime.datetime.utcnow() - client["last_checked_ok"])
2163
> client["interval"]):
2164
if client["last_checker_status"] != 0:
2165
client["enabled"] = False
2167
client["expires"] = datetime.datetime.utcnow() + client["timeout"]
2169
client["changedstate"] = (multiprocessing_manager
2170
.Condition(multiprocessing_manager
2173
new_client = ClientDBusTransitional.__new__(ClientDBusTransitional)
2174
tcp_server.clients[client_name] = new_client
2175
new_client.bus = bus
2176
for name, value in client.iteritems():
2177
setattr(new_client, name, value)
2178
client_object_name = unicode(client_name).translate(
2179
{ord("."): ord("_"),
2180
ord("-"): ord("_")})
2181
new_client.dbus_object_path = (dbus.ObjectPath
2182
("/clients/" + client_object_name))
2183
DBusObjectWithProperties.__init__(new_client,
2185
new_client.dbus_object_path)
2187
tcp_server.clients[client_name] = Client.__new__(Client)
2188
for name, value in client.iteritems():
2189
setattr(tcp_server.clients[client_name], name, value)
2191
tcp_server.clients[client_name].decrypt_secret(
2192
client_settings[client_name]["secret"])
2194
# Create/remove clients based on new changes made to config
2195
for clientname in set(old_client_settings) - set(client_settings):
2196
del tcp_server.clients[clientname]
2197
for clientname in set(client_settings) - set(old_client_settings):
2198
tcp_server.clients[clientname] = (client_class(name = clientname,
2690
client["secret"] = pgp.decrypt(
2691
client["encrypted_secret"],
2692
client_settings[client_name]["secret"])
2694
# If decryption fails, we use secret from new settings
2695
logger.debug("Failed to decrypt {} old secret".format(
2697
client["secret"] = (client_settings[client_name]
2700
# Add/remove clients based on new changes made to config
2701
for client_name in (set(old_client_settings)
2702
- set(client_settings)):
2703
del clients_data[client_name]
2704
for client_name in (set(client_settings)
2705
- set(old_client_settings)):
2706
clients_data[client_name] = client_settings[client_name]
2708
# Create all client objects
2709
for client_name, client in clients_data.items():
2710
tcp_server.clients[client_name] = client_class(
2713
server_settings = server_settings)
2204
2715
if not tcp_server.clients:
2205
2716
logger.warning("No clients defined")
2211
pidfile.write(str(pid) + "\n".encode("utf-8"))
2214
logger.error("Could not write to file %r with PID %d",
2217
# "pidfile" was never created
2719
if pidfile is not None:
2723
print(pid, file=pidfile)
2725
logger.error("Could not write to file %r with PID %d",
2219
2728
del pidfilename
2221
signal.signal(signal.SIGINT, signal.SIG_IGN)
2223
2730
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2224
2731
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2227
class MandosDBusService(dbus.service.Object):
2735
@alternate_dbus_interfaces(
2736
{ "se.recompile.Mandos": "se.bsnet.fukt.Mandos" })
2737
class MandosDBusService(DBusObjectWithProperties):
2228
2738
"""A D-Bus proxy object"""
2229
2740
def __init__(self):
2230
2741
dbus.service.Object.__init__(self, bus, "/")
2231
2743
_interface = "se.recompile.Mandos"
2745
@dbus_interface_annotations(_interface)
2748
"org.freedesktop.DBus.Property.EmitsChangedSignal":
2233
2751
@dbus.service.signal(_interface, signature="o")
2234
2752
def ClientAdded(self, objpath):
2280
class MandosDBusServiceTransitional(MandosDBusService):
2281
__metaclass__ = AlternateDBusNamesMetaclass
2282
mandos_dbus_service = MandosDBusServiceTransitional()
2797
mandos_dbus_service = MandosDBusService()
2285
2800
"Cleanup function; run on exit"
2288
2804
multiprocessing.active_children()
2289
2806
if not (tcp_server.clients or client_settings):
2292
# Store client before exiting. Secrets are encrypted with key based
2293
# on what config file has. If config file is removed/edited, old
2294
# secret will thus be unrecovable.
2296
for client in tcp_server.clients.itervalues():
2297
client.encrypt_secret(client_settings[client.name]["secret"])
2301
# A list of attributes that will not be stored when shuting down.
2302
exclude = set(("bus", "changedstate", "secret"))
2303
for name, typ in inspect.getmembers(dbus.service.Object):
2306
client_dict["encrypted_secret"] = client.encrypted_secret
2307
for attr in client.client_structure:
2308
if attr not in exclude:
2309
client_dict[attr] = getattr(client, attr)
2311
clients.append(client_dict)
2312
del client_settings[client.name]["secret"]
2809
# Store client before exiting. Secrets are encrypted with key
2810
# based on what config file has. If config file is
2811
# removed/edited, old secret will thus be unrecovable.
2813
with PGPEngine() as pgp:
2814
for client in tcp_server.clients.itervalues():
2815
key = client_settings[client.name]["secret"]
2816
client.encrypted_secret = pgp.encrypt(client.secret,
2820
# A list of attributes that can not be pickled
2822
exclude = { "bus", "changedstate", "secret",
2823
"checker", "server_settings" }
2824
for name, typ in inspect.getmembers(dbus.service
2828
client_dict["encrypted_secret"] = (client
2830
for attr in client.client_structure:
2831
if attr not in exclude:
2832
client_dict[attr] = getattr(client, attr)
2834
clients[client.name] = client_dict
2835
del client_settings[client.name]["secret"]
2315
with os.fdopen(os.open(stored_state_path, os.O_CREAT|os.O_WRONLY|os.O_TRUNC, 0600), "wb") as stored_state:
2838
with tempfile.NamedTemporaryFile(
2842
dir=os.path.dirname(stored_state_path),
2843
delete=False) as stored_state:
2316
2844
pickle.dump((clients, client_settings), stored_state)
2317
except IOError as e:
2318
logger.warning("Could not save persistant state: {0}".format(e))
2319
if e.errno != errno.ENOENT:
2845
tempname = stored_state.name
2846
os.rename(tempname, stored_state_path)
2847
except (IOError, OSError) as e:
2853
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
2854
logger.warning("Could not save persistent state: {}"
2855
.format(os.strerror(e.errno)))
2857
logger.warning("Could not save persistent state:",
2322
2861
# Delete all clients, and settings from config
2323
2862
while tcp_server.clients:
2324
2863
name, client = tcp_server.clients.popitem()