111
111
return interface_index
114
def initlogger(debug, level=logging.WARNING):
114
def initlogger(level=logging.WARNING):
115
115
"""init logger and add loglevel"""
118
syslogger = (logging.handlers.SysLogHandler
120
logging.handlers.SysLogHandler.LOG_DAEMON,
121
address = str("/dev/log")))
122
117
syslogger.setFormatter(logging.Formatter
123
118
('Mandos [%(process)d]: %(levelname)s:'
125
120
logger.addHandler(syslogger)
128
console = logging.StreamHandler()
129
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
133
logger.addHandler(console)
122
console = logging.StreamHandler()
123
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
127
logger.addHandler(console)
134
128
logger.setLevel(level)
175
170
def password_encode(self, password):
176
171
# Passphrase can not be empty and can not contain newlines or
177
172
# NUL bytes. So we prefix it and hex encode it.
178
encoded = b"mandos" + binascii.hexlify(password)
179
if len(encoded) > 2048:
180
# GnuPG can't handle long passwords, so encode differently
181
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
182
.replace(b"\n", b"\\n")
183
.replace(b"\0", b"\\x00"))
173
return b"mandos" + binascii.hexlify(password)
186
175
def encrypt(self, data, password):
187
passphrase = self.password_encode(password)
188
with tempfile.NamedTemporaryFile(dir=self.tempdir
190
passfile.write(passphrase)
192
proc = subprocess.Popen(['gpg', '--symmetric',
196
stdin = subprocess.PIPE,
197
stdout = subprocess.PIPE,
198
stderr = subprocess.PIPE)
199
ciphertext, err = proc.communicate(input = data)
200
if proc.returncode != 0:
176
self.gnupg.passphrase = self.password_encode(password)
177
with open(os.devnull) as devnull:
179
proc = self.gnupg.run(['--symmetric'],
180
create_fhs=['stdin', 'stdout'],
181
attach_fhs={'stderr': devnull})
182
with contextlib.closing(proc.handles['stdin']) as f:
184
with contextlib.closing(proc.handles['stdout']) as f:
185
ciphertext = f.read()
189
self.gnupg.passphrase = None
202
190
return ciphertext
204
192
def decrypt(self, data, password):
205
passphrase = self.password_encode(password)
206
with tempfile.NamedTemporaryFile(dir = self.tempdir
208
passfile.write(passphrase)
210
proc = subprocess.Popen(['gpg', '--decrypt',
214
stdin = subprocess.PIPE,
215
stdout = subprocess.PIPE,
216
stderr = subprocess.PIPE)
217
decrypted_plaintext, err = proc.communicate(input
219
if proc.returncode != 0:
193
self.gnupg.passphrase = self.password_encode(password)
194
with open(os.devnull) as devnull:
196
proc = self.gnupg.run(['--decrypt'],
197
create_fhs=['stdin', 'stdout'],
198
attach_fhs={'stderr': devnull})
199
with contextlib.closing(proc.handles['stdin'] ) as f:
201
with contextlib.closing(proc.handles['stdout']) as f:
202
decrypted_plaintext = f.read()
206
self.gnupg.passphrase = None
221
207
return decrypted_plaintext
224
211
class AvahiError(Exception):
225
212
def __init__(self, value, *args, **kwargs):
226
213
self.value = value
436
412
interval: datetime.timedelta(); How often to start a new checker
437
413
last_approval_request: datetime.datetime(); (UTC) or None
438
414
last_checked_ok: datetime.datetime(); (UTC) or None
439
416
last_checker_status: integer between 0 and 255 reflecting exit
440
417
status of last checker. -1 reflects crashed
441
checker, -2 means no checker completed yet.
442
419
last_enabled: datetime.datetime(); (UTC) or None
443
420
name: string; from the config file, used in log messages and
444
421
D-Bus identifiers
445
422
secret: bytestring; sent verbatim (over TLS) to client
446
423
timeout: datetime.timedelta(); How long from last_checked_ok
447
424
until this client is disabled
448
extended_timeout: extra long timeout when secret has been sent
425
extended_timeout: extra long timeout when password has been sent
449
426
runtime_expansions: Allowed attributes for runtime expansion.
450
427
expires: datetime.datetime(); time (UTC) when a client will be
451
428
disabled, or None
452
server_settings: The server_settings dict from main()
455
431
runtime_expansions = ("approval_delay", "approval_duration",
456
"created", "enabled", "expires",
457
"fingerprint", "host", "interval",
458
"last_approval_request", "last_checked_ok",
432
"created", "enabled", "fingerprint",
433
"host", "interval", "last_checked_ok",
459
434
"last_enabled", "name", "timeout")
460
client_defaults = { "timeout": "PT5M",
461
"extended_timeout": "PT15M",
463
"checker": "fping -q -- %%(host)s",
465
"approval_delay": "PT0S",
466
"approval_duration": "PT1S",
467
"approved_by_default": "True",
471
436
def timeout_milliseconds(self):
472
437
"Return the 'timeout' attribute in milliseconds"
483
448
def approval_delay_milliseconds(self):
484
449
return timedelta_to_milliseconds(self.approval_delay)
487
def config_parser(config):
488
"""Construct a new dict of client settings of this form:
489
{ client_name: {setting_name: value, ...}, ...}
490
with exceptions for any special settings as defined above.
491
NOTE: Must be a pure function. Must return the same result
492
value given the same arguments.
495
for client_name in config.sections():
496
section = dict(config.items(client_name))
497
client = settings[client_name] = {}
499
client["host"] = section["host"]
500
# Reformat values from string types to Python types
501
client["approved_by_default"] = config.getboolean(
502
client_name, "approved_by_default")
503
client["enabled"] = config.getboolean(client_name,
506
client["fingerprint"] = (section["fingerprint"].upper()
508
if "secret" in section:
509
client["secret"] = section["secret"].decode("base64")
510
elif "secfile" in section:
511
with open(os.path.expanduser(os.path.expandvars
512
(section["secfile"])),
514
client["secret"] = secfile.read()
516
raise TypeError("No secret or secfile for section {0}"
518
client["timeout"] = string_to_delta(section["timeout"])
519
client["extended_timeout"] = string_to_delta(
520
section["extended_timeout"])
521
client["interval"] = string_to_delta(section["interval"])
522
client["approval_delay"] = string_to_delta(
523
section["approval_delay"])
524
client["approval_duration"] = string_to_delta(
525
section["approval_duration"])
526
client["checker_command"] = section["checker"]
527
client["last_approval_request"] = None
528
client["last_checked_ok"] = None
529
client["last_checker_status"] = -2
533
def __init__(self, settings, name = None, server_settings=None):
451
def __init__(self, name = None, config=None):
452
"""Note: the 'checker' key in 'config' sets the
453
'checker_command' attribute and *not* the 'checker'
535
if server_settings is None:
537
self.server_settings = server_settings
538
# adding all client settings
539
for setting, value in settings.iteritems():
540
setattr(self, setting, value)
543
if not hasattr(self, "last_enabled"):
544
self.last_enabled = datetime.datetime.utcnow()
545
if not hasattr(self, "expires"):
546
self.expires = (datetime.datetime.utcnow()
549
self.last_enabled = None
552
458
logger.debug("Creating client %r", self.name)
553
459
# Uppercase and remove spaces from fingerprint for later
554
460
# comparison purposes with return value from the fingerprint()
462
self.fingerprint = (config["fingerprint"].upper()
556
464
logger.debug(" Fingerprint: %s", self.fingerprint)
557
self.created = settings.get("created",
558
datetime.datetime.utcnow())
560
# attributes specific for this server instance
465
if "secret" in config:
466
self.secret = config["secret"].decode("base64")
467
elif "secfile" in config:
468
with open(os.path.expanduser(os.path.expandvars
469
(config["secfile"])),
471
self.secret = secfile.read()
473
raise TypeError("No secret or secfile for client %s"
475
self.host = config.get("host", "")
476
self.created = datetime.datetime.utcnow()
477
self.enabled = config.get("enabled", True)
478
self.last_approval_request = None
480
self.last_enabled = datetime.datetime.utcnow()
482
self.last_enabled = None
483
self.last_checked_ok = None
484
self.last_checker_status = None
485
self.timeout = string_to_delta(config["timeout"])
486
self.extended_timeout = string_to_delta(config
487
["extended_timeout"])
488
self.interval = string_to_delta(config["interval"])
561
489
self.checker = None
562
490
self.checker_initiator_tag = None
563
491
self.disable_initiator_tag = None
493
self.expires = datetime.datetime.utcnow() + self.timeout
564
496
self.checker_callback_tag = None
497
self.checker_command = config["checker"]
565
498
self.current_checker_command = None
566
499
self.approved = None
500
self.approved_by_default = config.get("approved_by_default",
567
502
self.approvals_pending = 0
503
self.approval_delay = string_to_delta(
504
config["approval_delay"])
505
self.approval_duration = string_to_delta(
506
config["approval_duration"])
568
507
self.changedstate = (multiprocessing_manager
569
508
.Condition(multiprocessing_manager
590
529
if getattr(self, "enabled", False):
591
530
# Already enabled
532
self.send_changedstate()
593
533
self.expires = datetime.datetime.utcnow() + self.timeout
594
534
self.enabled = True
595
535
self.last_enabled = datetime.datetime.utcnow()
596
536
self.init_checker()
597
self.send_changedstate()
599
538
def disable(self, quiet=True):
600
539
"""Disable this client."""
601
540
if not getattr(self, "enabled", False):
543
self.send_changedstate()
604
545
logger.info("Disabling client %s", self.name)
605
if getattr(self, "disable_initiator_tag", None) is not None:
546
if getattr(self, "disable_initiator_tag", False):
606
547
gobject.source_remove(self.disable_initiator_tag)
607
548
self.disable_initiator_tag = None
608
549
self.expires = None
609
if getattr(self, "checker_initiator_tag", None) is not None:
550
if getattr(self, "checker_initiator_tag", False):
610
551
gobject.source_remove(self.checker_initiator_tag)
611
552
self.checker_initiator_tag = None
612
553
self.stop_checker()
613
554
self.enabled = False
615
self.send_changedstate()
616
555
# Do not run this again if called by a gobject.timeout_add
654
589
logger.warning("Checker for %(name)s crashed?",
657
def checked_ok(self):
658
"""Assert that the client has been seen, alive and well."""
659
self.last_checked_ok = datetime.datetime.utcnow()
660
self.last_checker_status = 0
663
def bump_timeout(self, timeout=None):
664
"""Bump up the timeout for this client."""
592
def checked_ok(self, timeout=None):
593
"""Bump up the timeout for this client.
595
This should only be called when the client has been seen,
665
598
if timeout is None:
666
599
timeout = self.timeout
600
self.last_checked_ok = datetime.datetime.utcnow()
667
601
if self.disable_initiator_tag is not None:
668
602
gobject.source_remove(self.disable_initiator_tag)
669
self.disable_initiator_tag = None
670
603
if getattr(self, "enabled", False):
671
604
self.disable_initiator_tag = (gobject.timeout_add
672
605
(timedelta_to_milliseconds
682
615
If a checker already exists, leave it running and do
684
617
# The reason for not killing a running checker is that if we
685
# did that, and if a checker (for some reason) started running
686
# slowly and taking more than 'interval' time, then the client
687
# would inevitably timeout, since no checker would get a
688
# chance to run to completion. If we instead leave running
618
# did that, then if a checker (for some reason) started
619
# running slowly and taking more than 'interval' time, the
620
# client would inevitably timeout, since no checker would get
621
# a chance to run to completion. If we instead leave running
689
622
# checkers alone, the checker would have to take more time
690
623
# than 'timeout' for the client to be disabled, which is as it
706
638
self.current_checker_command)
707
639
# Start a new checker if needed
708
640
if self.checker is None:
709
# Escape attributes for the shell
710
escaped_attrs = dict(
711
(attr, re.escape(unicode(getattr(self, attr))))
713
self.runtime_expansions)
715
command = self.checker_command % escaped_attrs
716
except TypeError as error:
717
logger.error('Could not format string "%s"',
718
self.checker_command, exc_info=error)
719
return True # Try again later
642
# In case checker_command has exactly one % operator
643
command = self.checker_command % self.host
645
# Escape attributes for the shell
646
escaped_attrs = dict(
648
re.escape(unicode(str(getattr(self, attr, "")),
652
self.runtime_expansions)
655
command = self.checker_command % escaped_attrs
656
except TypeError as error:
657
logger.error('Could not format string "%s":'
658
' %s', self.checker_command, error)
659
return True # Try again later
720
660
self.current_checker_command = command
722
662
logger.info("Starting checker %r for %s",
725
665
# in normal mode, that is already done by daemon(),
726
666
# and in debug mode we don't want to. (Stdin is
727
667
# always replaced by /dev/null.)
728
# The exception is when not debugging but nevertheless
729
# running in the foreground; use the previously
732
if (not self.server_settings["debug"]
733
and self.server_settings["foreground"]):
734
popen_args.update({"stdout": wnull,
736
668
self.checker = subprocess.Popen(command,
740
except OSError as error:
741
logger.error("Failed to start subprocess",
744
self.checker_callback_tag = (gobject.child_watch_add
746
self.checker_callback,
748
# The checker may have completed before the gobject
749
# watch was added. Check for this.
671
self.checker_callback_tag = (gobject.child_watch_add
673
self.checker_callback,
675
# The checker may have completed before the gobject
676
# watch was added. Check for this.
751
677
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
679
gobject.source_remove(self.checker_callback_tag)
680
self.checker_callback(pid, status, command)
752
681
except OSError as error:
753
if error.errno == errno.ECHILD:
754
# This should never happen
755
logger.error("Child process vanished",
760
gobject.source_remove(self.checker_callback_tag)
761
self.checker_callback(pid, status, command)
682
logger.error("Failed to start subprocess: %s",
762
684
# Re-run this periodically if run by gobject.timeout_add
814
def dbus_interface_annotations(dbus_interface):
815
"""Decorator for marking functions returning interface annotations
819
@dbus_interface_annotations("org.example.Interface")
820
def _foo(self): # Function name does not matter
821
return {"org.freedesktop.DBus.Deprecated": "true",
822
"org.freedesktop.DBus.Property.EmitsChangedSignal":
826
func._dbus_is_interface = True
827
func._dbus_interface = dbus_interface
828
func._dbus_name = dbus_interface
833
def dbus_annotations(annotations):
834
"""Decorator to annotate D-Bus methods, signals or properties
837
@dbus_service_property("org.example.Interface", signature="b",
839
@dbus_annotations({{"org.freedesktop.DBus.Deprecated": "true",
840
"org.freedesktop.DBus.Property."
841
"EmitsChangedSignal": "false"})
842
def Property_dbus_property(self):
843
return dbus.Boolean(False)
846
func._dbus_annotations = annotations
851
736
class DBusPropertyException(dbus.exceptions.DBusException):
852
737
"""A base class for D-Bus property-related exceptions
879
def _is_dbus_thing(thing):
880
"""Returns a function testing if an attribute is a D-Bus thing
882
If called like _is_dbus_thing("method") it returns a function
883
suitable for use as predicate to inspect.getmembers().
885
return lambda obj: getattr(obj, "_dbus_is_{0}".format(thing),
764
def _is_dbus_property(obj):
765
return getattr(obj, "_dbus_is_property", False)
888
def _get_all_dbus_things(self, thing):
767
def _get_all_dbus_properties(self):
889
768
"""Returns a generator of (name, attribute) pairs
891
return ((getattr(athing.__get__(self), "_dbus_name",
893
athing.__get__(self))
770
return ((prop.__get__(self)._dbus_name, prop.__get__(self))
894
771
for cls in self.__class__.__mro__
896
inspect.getmembers(cls,
897
self._is_dbus_thing(thing)))
773
inspect.getmembers(cls, self._is_dbus_property))
899
775
def _get_dbus_property(self, interface_name, property_name):
900
776
"""Returns a bound method if one exists which is a D-Bus
989
860
e.setAttribute("access", prop._dbus_access)
991
862
for if_tag in document.getElementsByTagName("interface"):
993
863
for tag in (make_tag(document, name, prop)
995
in self._get_all_dbus_things("property")
865
in self._get_all_dbus_properties()
996
866
if prop._dbus_interface
997
867
== if_tag.getAttribute("name")):
998
868
if_tag.appendChild(tag)
999
# Add annotation tags
1000
for typ in ("method", "signal", "property"):
1001
for tag in if_tag.getElementsByTagName(typ):
1003
for name, prop in (self.
1004
_get_all_dbus_things(typ)):
1005
if (name == tag.getAttribute("name")
1006
and prop._dbus_interface
1007
== if_tag.getAttribute("name")):
1008
annots.update(getattr
1010
"_dbus_annotations",
1012
for name, value in annots.iteritems():
1013
ann_tag = document.createElement(
1015
ann_tag.setAttribute("name", name)
1016
ann_tag.setAttribute("value", value)
1017
tag.appendChild(ann_tag)
1018
# Add interface annotation tags
1019
for annotation, value in dict(
1020
itertools.chain.from_iterable(
1021
annotations().iteritems()
1022
for name, annotations in
1023
self._get_all_dbus_things("interface")
1024
if name == if_tag.getAttribute("name")
1026
ann_tag = document.createElement("annotation")
1027
ann_tag.setAttribute("name", annotation)
1028
ann_tag.setAttribute("value", value)
1029
if_tag.appendChild(ann_tag)
1030
869
# Add the names to the return values for the
1031
870
# "org.freedesktop.DBus.Properties" methods
1032
871
if (if_tag.getAttribute("name")
1059
898
variant_level=variant_level)
1062
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1063
"""A class decorator; applied to a subclass of
1064
dbus.service.Object, it will add alternate D-Bus attributes with
1065
interface names according to the "alt_interface_names" mapping.
1068
@alternate_dbus_interfaces({"org.example.Interface":
1069
"net.example.AlternateInterface"})
1070
class SampleDBusObject(dbus.service.Object):
1071
@dbus.service.method("org.example.Interface")
1072
def SampleDBusMethod():
1075
The above "SampleDBusMethod" on "SampleDBusObject" will be
1076
reachable via two interfaces: "org.example.Interface" and
1077
"net.example.AlternateInterface", the latter of which will have
1078
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1079
"true", unless "deprecate" is passed with a False value.
1081
This works for methods and signals, and also for D-Bus properties
1082
(from DBusObjectWithProperties) and interfaces (from the
1083
dbus_interface_annotations decorator).
901
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
903
"""Applied to an empty subclass of a D-Bus object, this metaclass
904
will add additional D-Bus attributes matching a certain pattern.
1086
for orig_interface_name, alt_interface_name in (
1087
alt_interface_names.iteritems()):
1089
interface_names = set()
1090
# Go though all attributes of the class
1091
for attrname, attribute in inspect.getmembers(cls):
906
def __new__(mcs, name, bases, attr):
907
# Go through all the base classes which could have D-Bus
908
# methods, signals, or properties in them
909
for base in (b for b in bases
910
if issubclass(b, dbus.service.Object)):
911
# Go though all attributes of the base class
912
for attrname, attribute in inspect.getmembers(base):
1092
913
# Ignore non-D-Bus attributes, and D-Bus attributes
1093
914
# with the wrong interface name
1094
915
if (not hasattr(attribute, "_dbus_interface")
1095
916
or not attribute._dbus_interface
1096
.startswith(orig_interface_name)):
917
.startswith("se.recompile.Mandos")):
1098
919
# Create an alternate D-Bus interface name based on
1099
920
# the current name
1100
921
alt_interface = (attribute._dbus_interface
1101
.replace(orig_interface_name,
1102
alt_interface_name))
1103
interface_names.add(alt_interface)
922
.replace("se.recompile.Mandos",
923
"se.bsnet.fukt.Mandos"))
1104
924
# Is this a D-Bus signal?
1105
925
if getattr(attribute, "_dbus_is_signal", False):
1106
# Extract the original non-method undecorated
1107
# function by black magic
926
# Extract the original non-method function by
1108
928
nonmethod_func = (dict(
1109
929
zip(attribute.func_code.co_freevars,
1110
930
attribute.__closure__))["func"]
1121
941
nonmethod_func.func_name,
1122
942
nonmethod_func.func_defaults,
1123
943
nonmethod_func.func_closure)))
1124
# Copy annotations, if any
1126
new_function._dbus_annotations = (
1127
dict(attribute._dbus_annotations))
1128
except AttributeError:
1130
944
# Define a creator of a function to call both the
1131
# original and alternate functions, so both the
1132
# original and alternate signals gets sent when
1133
# the function is called
945
# old and new functions, so both the old and new
946
# signals gets sent when the function is called
1134
947
def fixscope(func1, func2):
1135
948
"""This function is a scope container to pass
1136
949
func1 and func2 to the "call_both" function
1185
993
attribute.func_name,
1186
994
attribute.func_defaults,
1187
995
attribute.func_closure)))
1188
# Copy annotations, if any
1190
attr[attrname]._dbus_annotations = (
1191
dict(attribute._dbus_annotations))
1192
except AttributeError:
1194
# Is this a D-Bus interface?
1195
elif getattr(attribute, "_dbus_is_interface", False):
1196
# Create a new, but exactly alike, function
1197
# object. Decorate it to be a new D-Bus interface
1198
# with the alternate D-Bus interface name. Add it
1200
attr[attrname] = (dbus_interface_annotations
1203
(attribute.func_code,
1204
attribute.func_globals,
1205
attribute.func_name,
1206
attribute.func_defaults,
1207
attribute.func_closure)))
1209
# Deprecate all alternate interfaces
1210
iname="_AlternateDBusNames_interface_annotation{0}"
1211
for interface_name in interface_names:
1212
@dbus_interface_annotations(interface_name)
1214
return { "org.freedesktop.DBus.Deprecated":
1216
# Find an unused name
1217
for aname in (iname.format(i)
1218
for i in itertools.count()):
1219
if aname not in attr:
1223
# Replace the class with a new subclass of it with
1224
# methods, signals, etc. as created above.
1225
cls = type(b"{0}Alternate".format(cls.__name__),
1231
@alternate_dbus_interfaces({"se.recompile.Mandos":
1232
"se.bsnet.fukt.Mandos"})
996
return type.__new__(mcs, name, bases, attr)
1233
999
class ClientDBus(Client, DBusObjectWithProperties):
1234
1000
"""A Client class using D-Bus
1561
1328
def Timeout_dbus_property(self, value=None):
1562
1329
if value is None: # get
1563
1330
return dbus.UInt64(self.timeout_milliseconds())
1564
old_timeout = self.timeout
1565
1331
self.timeout = datetime.timedelta(0, 0, 0, value)
1566
# Reschedule disabling
1568
now = datetime.datetime.utcnow()
1569
self.expires += self.timeout - old_timeout
1570
if self.expires <= now:
1571
# The timeout has passed
1574
if (getattr(self, "disable_initiator_tag", None)
1577
gobject.source_remove(self.disable_initiator_tag)
1578
self.disable_initiator_tag = (
1579
gobject.timeout_add(
1580
timedelta_to_milliseconds(self.expires - now),
1332
if getattr(self, "disable_initiator_tag", None) is None:
1334
# Reschedule timeout
1335
gobject.source_remove(self.disable_initiator_tag)
1336
self.disable_initiator_tag = None
1338
time_to_die = timedelta_to_milliseconds((self
1343
if time_to_die <= 0:
1344
# The timeout has passed
1347
self.expires = (datetime.datetime.utcnow()
1348
+ datetime.timedelta(milliseconds =
1350
self.disable_initiator_tag = (gobject.timeout_add
1351
(time_to_die, self.disable))
1583
1353
# ExtendedTimeout - property
1584
1354
@dbus_service_property(_interface, signature="t",
1930
1707
use_ipv6: Boolean; to use IPv6 or not
1932
1709
def __init__(self, server_address, RequestHandlerClass,
1933
interface=None, use_ipv6=True, socketfd=None):
1934
"""If socketfd is set, use that file descriptor instead of
1935
creating a new one with socket.socket().
1710
interface=None, use_ipv6=True):
1937
1711
self.interface = interface
1939
1713
self.address_family = socket.AF_INET6
1940
if socketfd is not None:
1941
# Save the file descriptor
1942
self.socketfd = socketfd
1943
# Save the original socket.socket() function
1944
self.socket_socket = socket.socket
1945
# To implement --socket, we monkey patch socket.socket.
1947
# (When socketserver.TCPServer is a new-style class, we
1948
# could make self.socket into a property instead of monkey
1949
# patching socket.socket.)
1951
# Create a one-time-only replacement for socket.socket()
1952
@functools.wraps(socket.socket)
1953
def socket_wrapper(*args, **kwargs):
1954
# Restore original function so subsequent calls are
1956
socket.socket = self.socket_socket
1957
del self.socket_socket
1958
# This time only, return a new socket object from the
1959
# saved file descriptor.
1960
return socket.fromfd(self.socketfd, *args, **kwargs)
1961
# Replace socket.socket() function with wrapper
1962
socket.socket = socket_wrapper
1963
# The socketserver.TCPServer.__init__ will call
1964
# socket.socket(), which might be our replacement,
1965
# socket_wrapper(), if socketfd was set.
1966
1714
socketserver.TCPServer.__init__(self, server_address,
1967
1715
RequestHandlerClass)
1969
1716
def server_bind(self):
1970
1717
"""This overrides the normal server_bind() function
1971
1718
to bind to an interface if one was specified, and also NOT to
1980
1727
self.socket.setsockopt(socket.SOL_SOCKET,
1981
1728
SO_BINDTODEVICE,
1982
str(self.interface + '\0'))
1983
1731
except socket.error as error:
1984
if error.errno == errno.EPERM:
1985
logger.error("No permission to bind to"
1986
" interface %s", self.interface)
1987
elif error.errno == errno.ENOPROTOOPT:
1732
if error[0] == errno.EPERM:
1733
logger.error("No permission to"
1734
" bind to interface %s",
1736
elif error[0] == errno.ENOPROTOOPT:
1988
1737
logger.error("SO_BINDTODEVICE not available;"
1989
1738
" cannot bind to interface %s",
1990
1739
self.interface)
1991
elif error.errno == errno.ENODEV:
1992
logger.error("Interface %s does not exist,"
1993
" cannot bind", self.interface)
1996
1742
# Only bind(2) the socket if we really need to.
2057
1802
def handle_ipc(self, source, condition, parent_pipe=None,
2058
1803
proc = None, client_object=None):
1805
gobject.IO_IN: "IN", # There is data to read.
1806
gobject.IO_OUT: "OUT", # Data can be written (without
1808
gobject.IO_PRI: "PRI", # There is urgent data to read.
1809
gobject.IO_ERR: "ERR", # Error condition.
1810
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1811
# broken, usually for pipes and
1814
conditions_string = ' | '.join(name
1816
condition_names.iteritems()
1817
if cond & condition)
2059
1818
# error, or the other end of multiprocessing.Pipe has closed
2060
if condition & (gobject.IO_ERR | gobject.IO_HUP):
1819
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
2061
1820
# Wait for other process to exit
2124
def rfc3339_duration_to_delta(duration):
2125
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2127
>>> rfc3339_duration_to_delta("P7D")
2128
datetime.timedelta(7)
2129
>>> rfc3339_duration_to_delta("PT60S")
2130
datetime.timedelta(0, 60)
2131
>>> rfc3339_duration_to_delta("PT60M")
2132
datetime.timedelta(0, 3600)
2133
>>> rfc3339_duration_to_delta("PT24H")
2134
datetime.timedelta(1)
2135
>>> rfc3339_duration_to_delta("P1W")
2136
datetime.timedelta(7)
2137
>>> rfc3339_duration_to_delta("PT5M30S")
2138
datetime.timedelta(0, 330)
2139
>>> rfc3339_duration_to_delta("P1DT3M20S")
2140
datetime.timedelta(1, 200)
2143
# Parsing an RFC 3339 duration with regular expressions is not
2144
# possible - there would have to be multiple places for the same
2145
# values, like seconds. The current code, while more esoteric, is
2146
# cleaner without depending on a parsing library. If Python had a
2147
# built-in library for parsing we would use it, but we'd like to
2148
# avoid excessive use of external libraries.
2150
# New type for defining tokens, syntax, and semantics all-in-one
2151
Token = collections.namedtuple("Token",
2152
("regexp", # To match token; if
2153
# "value" is not None,
2154
# must have a "group"
2156
"value", # datetime.timedelta or
2158
"followers")) # Tokens valid after
2160
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2161
# the "duration" ABNF definition in RFC 3339, Appendix A.
2162
token_end = Token(re.compile(r"$"), None, frozenset())
2163
token_second = Token(re.compile(r"(\d+)S"),
2164
datetime.timedelta(seconds=1),
2165
frozenset((token_end,)))
2166
token_minute = Token(re.compile(r"(\d+)M"),
2167
datetime.timedelta(minutes=1),
2168
frozenset((token_second, token_end)))
2169
token_hour = Token(re.compile(r"(\d+)H"),
2170
datetime.timedelta(hours=1),
2171
frozenset((token_minute, token_end)))
2172
token_time = Token(re.compile(r"T"),
2174
frozenset((token_hour, token_minute,
2176
token_day = Token(re.compile(r"(\d+)D"),
2177
datetime.timedelta(days=1),
2178
frozenset((token_time, token_end)))
2179
token_month = Token(re.compile(r"(\d+)M"),
2180
datetime.timedelta(weeks=4),
2181
frozenset((token_day, token_end)))
2182
token_year = Token(re.compile(r"(\d+)Y"),
2183
datetime.timedelta(weeks=52),
2184
frozenset((token_month, token_end)))
2185
token_week = Token(re.compile(r"(\d+)W"),
2186
datetime.timedelta(weeks=1),
2187
frozenset((token_end,)))
2188
token_duration = Token(re.compile(r"P"), None,
2189
frozenset((token_year, token_month,
2190
token_day, token_time,
2192
# Define starting values
2193
value = datetime.timedelta() # Value so far
2195
followers = frozenset(token_duration,) # Following valid tokens
2196
s = duration # String left to parse
2197
# Loop until end token is found
2198
while found_token is not token_end:
2199
# Search for any currently valid tokens
2200
for token in followers:
2201
match = token.regexp.match(s)
2202
if match is not None:
2204
if token.value is not None:
2205
# Value found, parse digits
2206
factor = int(match.group(1), 10)
2207
# Add to value so far
2208
value += factor * token.value
2209
# Strip token from string
2210
s = token.regexp.sub("", s, 1)
2213
# Set valid next tokens
2214
followers = found_token.followers
2217
# No currently valid tokens were found
2218
raise ValueError("Invalid RFC 3339 duration")
2223
1883
def string_to_delta(interval):
2224
1884
"""Parse a string and return a datetime.timedelta
2324
1977
parser.add_argument("--no-dbus", action="store_false",
2325
1978
dest="use_dbus", help="Do not provide D-Bus"
2326
" system bus interface", default=None)
1979
" system bus interface")
2327
1980
parser.add_argument("--no-ipv6", action="store_false",
2328
dest="use_ipv6", help="Do not use IPv6",
1981
dest="use_ipv6", help="Do not use IPv6")
2330
1982
parser.add_argument("--no-restore", action="store_false",
2331
1983
dest="restore", help="Do not restore stored"
2332
" state", default=None)
2333
parser.add_argument("--socket", type=int,
2334
help="Specify a file descriptor to a network"
2335
" socket to use instead of creating one")
2336
1985
parser.add_argument("--statedir", metavar="DIR",
2337
1986
help="Directory to save/restore state in")
2338
parser.add_argument("--foreground", action="store_true",
2339
help="Run in foreground", default=None)
2340
parser.add_argument("--no-zeroconf", action="store_false",
2341
dest="zeroconf", help="Do not use Zeroconf",
2344
1988
options = parser.parse_args()
2346
1990
if options.check:
2348
fail_count, test_count = doctest.testmod()
2349
sys.exit(os.EX_OK if fail_count == 0 else 1)
2351
1995
# Default values for config file for server-global settings
2352
1996
server_defaults = { "interface": "",
2374
2015
# Convert the SafeConfigParser object to a dict
2375
2016
server_settings = server_config.defaults()
2376
2017
# Use the appropriate methods on the non-string config options
2377
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
2018
for option in ("debug", "use_dbus", "use_ipv6"):
2378
2019
server_settings[option] = server_config.getboolean("DEFAULT",
2380
2021
if server_settings["port"]:
2381
2022
server_settings["port"] = server_config.getint("DEFAULT",
2383
if server_settings["socket"]:
2384
server_settings["socket"] = server_config.getint("DEFAULT",
2386
# Later, stdin will, and stdout and stderr might, be dup'ed
2387
# over with an opened os.devnull. But we don't want this to
2388
# happen with a supplied network socket.
2389
if 0 <= server_settings["socket"] <= 2:
2390
server_settings["socket"] = os.dup(server_settings
2392
2024
del server_config
2394
2026
# Override the settings from the config file with command line
2405
2037
for option in server_settings.keys():
2406
2038
if type(server_settings[option]) is str:
2407
2039
server_settings[option] = unicode(server_settings[option])
2408
# Force all boolean options to be boolean
2409
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2410
"foreground", "zeroconf"):
2411
server_settings[option] = bool(server_settings[option])
2412
# Debug implies foreground
2413
if server_settings["debug"]:
2414
server_settings["foreground"] = True
2415
2040
# Now we have our good server settings in "server_settings"
2417
2042
##################################################################
2419
if (not server_settings["zeroconf"] and
2420
not (server_settings["port"]
2421
or server_settings["socket"] != "")):
2422
parser.error("Needs port or socket to work without"
2425
2044
# For convenience
2426
2045
debug = server_settings["debug"]
2427
2046
debuglevel = server_settings["debuglevel"]
2429
2048
use_ipv6 = server_settings["use_ipv6"]
2430
2049
stored_state_path = os.path.join(server_settings["statedir"],
2431
2050
stored_state_file)
2432
foreground = server_settings["foreground"]
2433
zeroconf = server_settings["zeroconf"]
2436
initlogger(debug, logging.DEBUG)
2053
initlogger(logging.DEBUG)
2438
2055
if not debuglevel:
2441
2058
level = getattr(logging, debuglevel.upper())
2442
initlogger(debug, level)
2444
2061
if server_settings["servicename"] != "Mandos":
2445
2062
syslogger.setFormatter(logging.Formatter
2446
('Mandos ({0}) [%(process)d]:'
2447
' %(levelname)s: %(message)s'
2448
.format(server_settings
2063
('Mandos (%s) [%%(process)d]:'
2064
' %%(levelname)s: %%(message)s'
2065
% server_settings["servicename"]))
2451
2067
# Parse config file with clients
2452
client_config = configparser.SafeConfigParser(Client
2068
client_defaults = { "timeout": "5m",
2069
"extended_timeout": "15m",
2071
"checker": "fping -q -- %%(host)s",
2073
"approval_delay": "0s",
2074
"approval_duration": "1s",
2076
client_config = configparser.SafeConfigParser(client_defaults)
2454
2077
client_config.read(os.path.join(server_settings["configdir"],
2455
2078
"clients.conf"))
2457
2080
global mandos_dbus_service
2458
2081
mandos_dbus_service = None
2461
if server_settings["socket"] != "":
2462
socketfd = server_settings["socket"]
2463
2083
tcp_server = MandosServer((server_settings["address"],
2464
2084
server_settings["port"]),
2468
2088
use_ipv6=use_ipv6,
2469
2089
gnutls_priority=
2470
2090
server_settings["priority"],
2474
pidfilename = "/run/mandos.pid"
2475
if not os.path.isdir("/run/."):
2476
pidfilename = "/var/run/mandos.pid"
2093
pidfilename = "/var/run/mandos.pid"
2479
2095
pidfile = open(pidfilename, "w")
2480
except IOError as e:
2481
logger.error("Could not open file %r", pidfilename,
2097
logger.error("Could not open file %r", pidfilename)
2484
for name in ("_mandos", "mandos", "nobody"):
2100
uid = pwd.getpwnam("_mandos").pw_uid
2101
gid = pwd.getpwnam("_mandos").pw_gid
2486
uid = pwd.getpwnam(name).pw_uid
2487
gid = pwd.getpwnam(name).pw_gid
2104
uid = pwd.getpwnam("mandos").pw_uid
2105
gid = pwd.getpwnam("mandos").pw_gid
2489
2106
except KeyError:
2108
uid = pwd.getpwnam("nobody").pw_uid
2109
gid = pwd.getpwnam("nobody").pw_gid
2497
2116
except OSError as error:
2498
if error.errno != errno.EPERM:
2117
if error[0] != errno.EPERM:
2502
2121
# Enable all possible GnuTLS debugging
2513
2132
.gnutls_global_set_log_function(debug_gnutls))
2515
2134
# Redirect stdin so all checkers get /dev/null
2516
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2135
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2517
2136
os.dup2(null, sys.stdin.fileno())
2140
# No console logging
2141
logger.removeHandler(console)
2521
2143
# Need to fork before connecting to D-Bus
2523
2145
# Close all input and output, do double fork, etc.
2526
# multiprocessing will use threads, so before we use gobject we
2527
# need to inform gobject that threads will be used.
2528
gobject.threads_init()
2530
2148
global main_loop
2531
2149
# From the Avahi example code
2532
DBusGMainLoop(set_as_default=True)
2150
DBusGMainLoop(set_as_default=True )
2533
2151
main_loop = gobject.MainLoop()
2534
2152
bus = dbus.SystemBus()
2535
2153
# End of Avahi example code
2541
2159
("se.bsnet.fukt.Mandos", bus,
2542
2160
do_not_queue=True))
2543
2161
except dbus.exceptions.NameExistsException as e:
2544
logger.error("Disabling D-Bus:", exc_info=e)
2162
logger.error(unicode(e) + ", disabling D-Bus")
2545
2163
use_dbus = False
2546
2164
server_settings["use_dbus"] = False
2547
2165
tcp_server.use_dbus = False
2549
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2550
service = AvahiServiceToSyslog(name =
2551
server_settings["servicename"],
2552
servicetype = "_mandos._tcp",
2553
protocol = protocol, bus = bus)
2554
if server_settings["interface"]:
2555
service.interface = (if_nametoindex
2556
(str(server_settings["interface"])))
2166
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2167
service = AvahiServiceToSyslog(name =
2168
server_settings["servicename"],
2169
servicetype = "_mandos._tcp",
2170
protocol = protocol, bus = bus)
2171
if server_settings["interface"]:
2172
service.interface = (if_nametoindex
2173
(str(server_settings["interface"])))
2558
2175
global multiprocessing_manager
2559
2176
multiprocessing_manager = multiprocessing.Manager()
2561
2178
client_class = Client
2563
client_class = functools.partial(ClientDBus, bus = bus)
2565
client_settings = Client.config_parser(client_config)
2180
client_class = functools.partial(ClientDBusTransitional,
2183
special_settings = {
2184
# Some settings need to be accessd by special methods;
2185
# booleans need .getboolean(), etc. Here is a list of them:
2186
"approved_by_default":
2188
client_config.getboolean(section, "approved_by_default"),
2191
client_config.getboolean(section, "enabled"),
2193
# Construct a new dict of client settings of this form:
2194
# { client_name: {setting_name: value, ...}, ...}
2195
# with exceptions for any special settings as defined above
2196
client_settings = dict((clientname,
2199
if setting not in special_settings
2200
else special_settings[setting]
2202
for setting, value in
2203
client_config.items(clientname)))
2204
for clientname in client_config.sections())
2566
2206
old_client_settings = {}
2569
# This is used to redirect stdout and stderr for checker processes
2571
wnull = open(os.devnull, "w") # A writable /dev/null
2572
# Only used if server is running in foreground but not in debug
2574
if debug or not foreground:
2577
2209
# Get client data and settings from last running state.
2578
2210
if server_settings["restore"]:
2582
2214
(stored_state))
2583
2215
os.remove(stored_state_path)
2584
2216
except IOError as e:
2585
if e.errno == errno.ENOENT:
2586
logger.warning("Could not load persistent state: {0}"
2587
.format(os.strerror(e.errno)))
2589
logger.critical("Could not load persistent state:",
2217
logger.warning("Could not load persistent state: {0}"
2219
if e.errno != errno.ENOENT:
2592
except EOFError as e:
2593
logger.warning("Could not load persistent state: "
2594
"EOFError:", exc_info=e)
2596
2222
with PGPEngine() as pgp:
2597
for client_name, client in clients_data.iteritems():
2598
# Skip removed clients
2599
if client_name not in client_settings:
2223
for client in clients_data:
2224
client_name = client["name"]
2602
2226
# Decide which value to use after restoring saved state.
2603
2227
# We have three different values: Old config file,
2612
2236
if (name != "secret" and
2613
2237
value != old_client_settings[client_name]
2615
client[name] = value
2239
setattr(client, name, value)
2616
2240
except KeyError:
2619
2243
# Clients who has passed its expire date can still be
2620
# enabled if its last checker was successful. Clients
2621
# whose checker succeeded before we stored its state is
2622
# assumed to have successfully run all checkers during
2244
# enabled if its last checker was sucessful. Clients
2245
# whose checker failed before we stored its state is
2246
# assumed to have failed all checkers during downtime.
2624
2247
if client["enabled"]:
2625
if datetime.datetime.utcnow() >= client["expires"]:
2626
if not client["last_checked_ok"]:
2628
"disabling client {0} - Client never "
2629
"performed a successful checker"
2630
.format(client_name))
2631
client["enabled"] = False
2632
elif client["last_checker_status"] != 0:
2634
"disabling client {0} - Client "
2635
"last checker failed with error code {1}"
2636
.format(client_name,
2637
client["last_checker_status"]))
2248
if client["expires"] <= (datetime.datetime
2250
# Client has expired
2251
if client["last_checker_status"] != 0:
2638
2252
client["enabled"] = False
2640
2254
client["expires"] = (datetime.datetime
2642
2256
+ client["timeout"])
2643
logger.debug("Last checker succeeded,"
2644
" keeping {0} enabled"
2645
.format(client_name))
2258
client["changedstate"] = (multiprocessing_manager
2260
(multiprocessing_manager
2263
new_client = (ClientDBusTransitional.__new__
2264
(ClientDBusTransitional))
2265
tcp_server.clients[client_name] = new_client
2266
new_client.bus = bus
2267
for name, value in client.iteritems():
2268
setattr(new_client, name, value)
2269
client_object_name = unicode(client_name).translate(
2270
{ord("."): ord("_"),
2271
ord("-"): ord("_")})
2272
new_client.dbus_object_path = (dbus.ObjectPath
2274
+ client_object_name))
2275
DBusObjectWithProperties.__init__(new_client,
2280
tcp_server.clients[client_name] = (Client.__new__
2282
for name, value in client.iteritems():
2283
setattr(tcp_server.clients[client_name],
2647
client["secret"] = (
2648
pgp.decrypt(client["encrypted_secret"],
2287
tcp_server.clients[client_name].secret = (
2288
pgp.decrypt(tcp_server.clients[client_name]
2649
2290
client_settings[client_name]
2651
2292
except PGPError:
2652
2293
# If decryption fails, we use secret from new settings
2653
2294
logger.debug("Failed to decrypt {0} old secret"
2654
2295
.format(client_name))
2655
client["secret"] = (
2296
tcp_server.clients[client_name].secret = (
2656
2297
client_settings[client_name]["secret"])
2658
# Add/remove clients based on new changes made to config
2659
for client_name in (set(old_client_settings)
2660
- set(client_settings)):
2661
del clients_data[client_name]
2662
for client_name in (set(client_settings)
2663
- set(old_client_settings)):
2664
clients_data[client_name] = client_settings[client_name]
2666
# Create all client objects
2667
for client_name, client in clients_data.iteritems():
2668
tcp_server.clients[client_name] = client_class(
2669
name = client_name, settings = client,
2670
server_settings = server_settings)
2299
# Create/remove clients based on new changes made to config
2300
for clientname in set(old_client_settings) - set(client_settings):
2301
del tcp_server.clients[clientname]
2302
for clientname in set(client_settings) - set(old_client_settings):
2303
tcp_server.clients[clientname] = (client_class(name
2672
2309
if not tcp_server.clients:
2673
2310
logger.warning("No clients defined")
2676
if pidfile is not None:
2680
pidfile.write(str(pid) + "\n".encode("utf-8"))
2682
logger.error("Could not write to file %r with PID %d",
2316
pidfile.write(str(pid) + "\n".encode("utf-8"))
2319
logger.error("Could not write to file %r with PID %d",
2322
# "pidfile" was never created
2685
2324
del pidfilename
2326
signal.signal(signal.SIGINT, signal.SIG_IGN)
2687
2328
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2688
2329
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2691
@alternate_dbus_interfaces({"se.recompile.Mandos":
2692
"se.bsnet.fukt.Mandos"})
2693
class MandosDBusService(DBusObjectWithProperties):
2332
class MandosDBusService(dbus.service.Object):
2694
2333
"""A D-Bus proxy object"""
2695
2334
def __init__(self):
2696
2335
dbus.service.Object.__init__(self, bus, "/")
2697
2336
_interface = "se.recompile.Mandos"
2699
@dbus_interface_annotations(_interface)
2701
return { "org.freedesktop.DBus.Property"
2702
".EmitsChangedSignal":
2705
2338
@dbus.service.signal(_interface, signature="o")
2706
2339
def ClientAdded(self, objpath):
2786
2418
if attr not in exclude:
2787
2419
client_dict[attr] = getattr(client, attr)
2789
clients[client.name] = client_dict
2421
clients.append(client_dict)
2790
2422
del client_settings[client.name]["secret"]
2793
with (tempfile.NamedTemporaryFile
2794
(mode='wb', suffix=".pickle", prefix='clients-',
2795
dir=os.path.dirname(stored_state_path),
2796
delete=False)) as stored_state:
2425
with os.fdopen(os.open(stored_state_path,
2426
os.O_CREAT|os.O_WRONLY|os.O_TRUNC,
2427
0600), "wb") as stored_state:
2797
2428
pickle.dump((clients, client_settings), stored_state)
2798
tempname=stored_state.name
2799
os.rename(tempname, stored_state_path)
2800
2429
except (IOError, OSError) as e:
2806
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
2807
logger.warning("Could not save persistent state: {0}"
2808
.format(os.strerror(e.errno)))
2810
logger.warning("Could not save persistent state:",
2430
logger.warning("Could not save persistent state: {0}"
2432
if e.errno not in (errno.ENOENT, errno.EACCES):
2814
2435
# Delete all clients, and settings from config
2839
2460
tcp_server.server_activate()
2841
2462
# Find out what port we got
2843
service.port = tcp_server.socket.getsockname()[1]
2463
service.port = tcp_server.socket.getsockname()[1]
2845
2465
logger.info("Now listening on address %r, port %d,"
2846
" flowinfo %d, scope_id %d",
2847
*tcp_server.socket.getsockname())
2466
" flowinfo %d, scope_id %d"
2467
% tcp_server.socket.getsockname())
2849
logger.info("Now listening on address %r, port %d",
2850
*tcp_server.socket.getsockname())
2469
logger.info("Now listening on address %r, port %d"
2470
% tcp_server.socket.getsockname())
2852
2472
#service.interface = tcp_server.socket.getsockname()[3]
2856
# From the Avahi example code
2859
except dbus.exceptions.DBusException as error:
2860
logger.critical("D-Bus Exception", exc_info=error)
2863
# End of Avahi example code
2475
# From the Avahi example code
2478
except dbus.exceptions.DBusException as error:
2479
logger.critical("DBusException: %s", error)
2482
# End of Avahi example code
2865
2484
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2866
2485
lambda *args, **kwargs: