172
170
def password_encode(self, password):
173
171
# Passphrase can not be empty and can not contain newlines or
174
172
# NUL bytes. So we prefix it and hex encode it.
175
encoded = b"mandos" + binascii.hexlify(password)
176
if len(encoded) > 2048:
177
# GnuPG can't handle long passwords, so encode differently
178
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
179
.replace(b"\n", b"\\n")
180
.replace(b"\0", b"\\x00"))
173
return b"mandos" + binascii.hexlify(password)
183
175
def encrypt(self, data, password):
184
passphrase = self.password_encode(password)
185
with tempfile.NamedTemporaryFile(dir=self.tempdir
187
passfile.write(passphrase)
189
proc = subprocess.Popen(['gpg', '--symmetric',
193
stdin = subprocess.PIPE,
194
stdout = subprocess.PIPE,
195
stderr = subprocess.PIPE)
196
ciphertext, err = proc.communicate(input = data)
197
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
199
190
return ciphertext
201
192
def decrypt(self, data, password):
202
passphrase = self.password_encode(password)
203
with tempfile.NamedTemporaryFile(dir = self.tempdir
205
passfile.write(passphrase)
207
proc = subprocess.Popen(['gpg', '--decrypt',
211
stdin = subprocess.PIPE,
212
stdout = subprocess.PIPE,
213
stderr = subprocess.PIPE)
214
decrypted_plaintext, err = proc.communicate(input
216
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
218
207
return decrypted_plaintext
221
211
class AvahiError(Exception):
222
212
def __init__(self, value, *args, **kwargs):
223
213
self.value = value
386
368
self.server_state_changed)
387
369
self.server_state_changed(self.server.GetState())
390
371
class AvahiServiceToSyslog(AvahiService):
391
372
def rename(self):
392
373
"""Add the new name to the syslog messages"""
393
374
ret = AvahiService.rename(self)
394
375
syslogger.setFormatter(logging.Formatter
395
('Mandos ({0}) [%(process)d]:'
396
' %(levelname)s: %(message)s'
376
('Mandos (%s) [%%(process)d]:'
377
' %%(levelname)s: %%(message)s'
401
381
def timedelta_to_milliseconds(td):
402
382
"Convert a datetime.timedelta() to milliseconds"
403
383
return ((td.days * 24 * 60 * 60 * 1000)
404
384
+ (td.seconds * 1000)
405
385
+ (td.microseconds // 1000))
408
387
class Client(object):
409
388
"""A representation of a client host served by this server.
435
414
last_checked_ok: datetime.datetime(); (UTC) or None
436
415
last_checker_status: integer between 0 and 255 reflecting exit
437
416
status of last checker. -1 reflects crashed
438
checker, -2 means no checker completed yet.
439
418
last_enabled: datetime.datetime(); (UTC) or None
440
419
name: string; from the config file, used in log messages and
441
420
D-Bus identifiers
442
421
secret: bytestring; sent verbatim (over TLS) to client
443
422
timeout: datetime.timedelta(); How long from last_checked_ok
444
423
until this client is disabled
445
extended_timeout: extra long timeout when secret has been sent
424
extended_timeout: extra long timeout when password has been sent
446
425
runtime_expansions: Allowed attributes for runtime expansion.
447
426
expires: datetime.datetime(); time (UTC) when a client will be
448
427
disabled, or None
449
server_settings: The server_settings dict from main()
452
430
runtime_expansions = ("approval_delay", "approval_duration",
453
"created", "enabled", "expires",
454
"fingerprint", "host", "interval",
455
"last_approval_request", "last_checked_ok",
431
"created", "enabled", "fingerprint",
432
"host", "interval", "last_checked_ok",
456
433
"last_enabled", "name", "timeout")
457
client_defaults = { "timeout": "PT5M",
458
"extended_timeout": "PT15M",
434
client_defaults = { "timeout": "5m",
435
"extended_timeout": "15m",
460
437
"checker": "fping -q -- %%(host)s",
462
"approval_delay": "PT0S",
463
"approval_duration": "PT1S",
439
"approval_delay": "0s",
440
"approval_duration": "1s",
464
441
"approved_by_default": "True",
465
442
"enabled": "True",
523
496
client["checker_command"] = section["checker"]
524
497
client["last_approval_request"] = None
525
498
client["last_checked_ok"] = None
526
client["last_checker_status"] = -2
499
client["last_checker_status"] = None
500
if client["enabled"]:
501
client["last_enabled"] = datetime.datetime.utcnow()
502
client["expires"] = (datetime.datetime.utcnow()
505
client["last_enabled"] = None
506
client["expires"] = None
530
def __init__(self, settings, name = None, server_settings=None):
511
def __init__(self, settings, name = None):
512
"""Note: the 'checker' key in 'config' sets the
513
'checker_command' attribute and *not* the 'checker'
532
if server_settings is None:
534
self.server_settings = server_settings
535
516
# adding all client settings
536
517
for setting, value in settings.iteritems():
537
518
setattr(self, setting, value)
540
if not hasattr(self, "last_enabled"):
541
self.last_enabled = datetime.datetime.utcnow()
542
if not hasattr(self, "expires"):
543
self.expires = (datetime.datetime.utcnow()
546
self.last_enabled = None
549
520
logger.debug("Creating client %r", self.name)
550
521
# Uppercase and remove spaces from fingerprint for later
551
522
# comparison purposes with return value from the fingerprint()
553
524
logger.debug(" Fingerprint: %s", self.fingerprint)
554
self.created = settings.get("created",
555
datetime.datetime.utcnow())
525
self.created = settings.get("created", datetime.datetime.utcnow())
557
527
# attributes specific for this server instance
558
528
self.checker = None
559
529
self.checker_initiator_tag = None
587
557
if getattr(self, "enabled", False):
588
558
# Already enabled
560
self.send_changedstate()
590
561
self.expires = datetime.datetime.utcnow() + self.timeout
591
562
self.enabled = True
592
563
self.last_enabled = datetime.datetime.utcnow()
593
564
self.init_checker()
594
self.send_changedstate()
596
566
def disable(self, quiet=True):
597
567
"""Disable this client."""
598
568
if not getattr(self, "enabled", False):
571
self.send_changedstate()
601
573
logger.info("Disabling client %s", self.name)
602
if getattr(self, "disable_initiator_tag", None) is not None:
574
if getattr(self, "disable_initiator_tag", False):
603
575
gobject.source_remove(self.disable_initiator_tag)
604
576
self.disable_initiator_tag = None
605
577
self.expires = None
606
if getattr(self, "checker_initiator_tag", None) is not None:
578
if getattr(self, "checker_initiator_tag", False):
607
579
gobject.source_remove(self.checker_initiator_tag)
608
580
self.checker_initiator_tag = None
609
581
self.stop_checker()
610
582
self.enabled = False
612
self.send_changedstate()
613
583
# Do not run this again if called by a gobject.timeout_add
651
617
logger.warning("Checker for %(name)s crashed?",
654
def checked_ok(self):
655
"""Assert that the client has been seen, alive and well."""
656
self.last_checked_ok = datetime.datetime.utcnow()
657
self.last_checker_status = 0
660
def bump_timeout(self, timeout=None):
661
"""Bump up the timeout for this client."""
620
def checked_ok(self, timeout=None):
621
"""Bump up the timeout for this client.
623
This should only be called when the client has been seen,
662
626
if timeout is None:
663
627
timeout = self.timeout
628
self.last_checked_ok = datetime.datetime.utcnow()
664
629
if self.disable_initiator_tag is not None:
665
630
gobject.source_remove(self.disable_initiator_tag)
666
self.disable_initiator_tag = None
667
631
if getattr(self, "enabled", False):
668
632
self.disable_initiator_tag = (gobject.timeout_add
669
633
(timedelta_to_milliseconds
679
643
If a checker already exists, leave it running and do
681
645
# The reason for not killing a running checker is that if we
682
# did that, and if a checker (for some reason) started running
683
# slowly and taking more than 'interval' time, then the client
684
# would inevitably timeout, since no checker would get a
685
# chance to run to completion. If we instead leave running
646
# did that, then if a checker (for some reason) started
647
# running slowly and taking more than 'interval' time, the
648
# client would inevitably timeout, since no checker would get
649
# a chance to run to completion. If we instead leave running
686
650
# checkers alone, the checker would have to take more time
687
651
# than 'timeout' for the client to be disabled, which is as it
703
666
self.current_checker_command)
704
667
# Start a new checker if needed
705
668
if self.checker is None:
706
# Escape attributes for the shell
707
escaped_attrs = dict(
708
(attr, re.escape(unicode(getattr(self, attr))))
710
self.runtime_expansions)
712
command = self.checker_command % escaped_attrs
713
except TypeError as error:
714
logger.error('Could not format string "%s"',
715
self.checker_command, exc_info=error)
716
return True # Try again later
670
# In case checker_command has exactly one % operator
671
command = self.checker_command % self.host
673
# Escape attributes for the shell
674
escaped_attrs = dict(
676
re.escape(unicode(str(getattr(self, attr, "")),
680
self.runtime_expansions)
683
command = self.checker_command % escaped_attrs
684
except TypeError as error:
685
logger.error('Could not format string "%s":'
686
' %s', self.checker_command, error)
687
return True # Try again later
717
688
self.current_checker_command = command
719
690
logger.info("Starting checker %r for %s",
722
693
# in normal mode, that is already done by daemon(),
723
694
# and in debug mode we don't want to. (Stdin is
724
695
# always replaced by /dev/null.)
725
# The exception is when not debugging but nevertheless
726
# running in the foreground; use the previously
729
if (not self.server_settings["debug"]
730
and self.server_settings["foreground"]):
731
popen_args.update({"stdout": wnull,
733
696
self.checker = subprocess.Popen(command,
737
except OSError as error:
738
logger.error("Failed to start subprocess",
741
self.checker_callback_tag = (gobject.child_watch_add
743
self.checker_callback,
745
# The checker may have completed before the gobject
746
# watch was added. Check for this.
699
self.checker_callback_tag = (gobject.child_watch_add
701
self.checker_callback,
703
# The checker may have completed before the gobject
704
# watch was added. Check for this.
748
705
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
707
gobject.source_remove(self.checker_callback_tag)
708
self.checker_callback(pid, status, command)
749
709
except OSError as error:
750
if error.errno == errno.ECHILD:
751
# This should never happen
752
logger.error("Child process vanished",
757
gobject.source_remove(self.checker_callback_tag)
758
self.checker_callback(pid, status, command)
710
logger.error("Failed to start subprocess: %s",
759
712
# Re-run this periodically if run by gobject.timeout_add
811
def dbus_interface_annotations(dbus_interface):
812
"""Decorator for marking functions returning interface annotations
816
@dbus_interface_annotations("org.example.Interface")
817
def _foo(self): # Function name does not matter
818
return {"org.freedesktop.DBus.Deprecated": "true",
819
"org.freedesktop.DBus.Property.EmitsChangedSignal":
823
func._dbus_is_interface = True
824
func._dbus_interface = dbus_interface
825
func._dbus_name = dbus_interface
830
def dbus_annotations(annotations):
831
"""Decorator to annotate D-Bus methods, signals or properties
834
@dbus_service_property("org.example.Interface", signature="b",
836
@dbus_annotations({{"org.freedesktop.DBus.Deprecated": "true",
837
"org.freedesktop.DBus.Property."
838
"EmitsChangedSignal": "false"})
839
def Property_dbus_property(self):
840
return dbus.Boolean(False)
843
func._dbus_annotations = annotations
848
764
class DBusPropertyException(dbus.exceptions.DBusException):
849
765
"""A base class for D-Bus property-related exceptions
876
def _is_dbus_thing(thing):
877
"""Returns a function testing if an attribute is a D-Bus thing
879
If called like _is_dbus_thing("method") it returns a function
880
suitable for use as predicate to inspect.getmembers().
882
return lambda obj: getattr(obj, "_dbus_is_{0}".format(thing),
792
def _is_dbus_property(obj):
793
return getattr(obj, "_dbus_is_property", False)
885
def _get_all_dbus_things(self, thing):
795
def _get_all_dbus_properties(self):
886
796
"""Returns a generator of (name, attribute) pairs
888
return ((getattr(athing.__get__(self), "_dbus_name",
890
athing.__get__(self))
798
return ((prop.__get__(self)._dbus_name, prop.__get__(self))
891
799
for cls in self.__class__.__mro__
893
inspect.getmembers(cls,
894
self._is_dbus_thing(thing)))
801
inspect.getmembers(cls, self._is_dbus_property))
896
803
def _get_dbus_property(self, interface_name, property_name):
897
804
"""Returns a bound method if one exists which is a D-Bus
984
888
e.setAttribute("access", prop._dbus_access)
986
890
for if_tag in document.getElementsByTagName("interface"):
988
891
for tag in (make_tag(document, name, prop)
990
in self._get_all_dbus_things("property")
893
in self._get_all_dbus_properties()
991
894
if prop._dbus_interface
992
895
== if_tag.getAttribute("name")):
993
896
if_tag.appendChild(tag)
994
# Add annotation tags
995
for typ in ("method", "signal", "property"):
996
for tag in if_tag.getElementsByTagName(typ):
998
for name, prop in (self.
999
_get_all_dbus_things(typ)):
1000
if (name == tag.getAttribute("name")
1001
and prop._dbus_interface
1002
== if_tag.getAttribute("name")):
1003
annots.update(getattr
1005
"_dbus_annotations",
1007
for name, value in annots.iteritems():
1008
ann_tag = document.createElement(
1010
ann_tag.setAttribute("name", name)
1011
ann_tag.setAttribute("value", value)
1012
tag.appendChild(ann_tag)
1013
# Add interface annotation tags
1014
for annotation, value in dict(
1015
itertools.chain.from_iterable(
1016
annotations().iteritems()
1017
for name, annotations in
1018
self._get_all_dbus_things("interface")
1019
if name == if_tag.getAttribute("name")
1021
ann_tag = document.createElement("annotation")
1022
ann_tag.setAttribute("name", annotation)
1023
ann_tag.setAttribute("value", value)
1024
if_tag.appendChild(ann_tag)
1025
897
# Add the names to the return values for the
1026
898
# "org.freedesktop.DBus.Properties" methods
1027
899
if (if_tag.getAttribute("name")
1054
926
variant_level=variant_level)
1057
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1058
"""A class decorator; applied to a subclass of
1059
dbus.service.Object, it will add alternate D-Bus attributes with
1060
interface names according to the "alt_interface_names" mapping.
1063
@alternate_dbus_interfaces({"org.example.Interface":
1064
"net.example.AlternateInterface"})
1065
class SampleDBusObject(dbus.service.Object):
1066
@dbus.service.method("org.example.Interface")
1067
def SampleDBusMethod():
1070
The above "SampleDBusMethod" on "SampleDBusObject" will be
1071
reachable via two interfaces: "org.example.Interface" and
1072
"net.example.AlternateInterface", the latter of which will have
1073
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1074
"true", unless "deprecate" is passed with a False value.
1076
This works for methods and signals, and also for D-Bus properties
1077
(from DBusObjectWithProperties) and interfaces (from the
1078
dbus_interface_annotations decorator).
929
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
931
"""Applied to an empty subclass of a D-Bus object, this metaclass
932
will add additional D-Bus attributes matching a certain pattern.
1081
for orig_interface_name, alt_interface_name in (
1082
alt_interface_names.iteritems()):
1084
interface_names = set()
1085
# Go though all attributes of the class
1086
for attrname, attribute in inspect.getmembers(cls):
934
def __new__(mcs, name, bases, attr):
935
# Go through all the base classes which could have D-Bus
936
# methods, signals, or properties in them
937
for base in (b for b in bases
938
if issubclass(b, dbus.service.Object)):
939
# Go though all attributes of the base class
940
for attrname, attribute in inspect.getmembers(base):
1087
941
# Ignore non-D-Bus attributes, and D-Bus attributes
1088
942
# with the wrong interface name
1089
943
if (not hasattr(attribute, "_dbus_interface")
1090
944
or not attribute._dbus_interface
1091
.startswith(orig_interface_name)):
945
.startswith("se.recompile.Mandos")):
1093
947
# Create an alternate D-Bus interface name based on
1094
948
# the current name
1095
949
alt_interface = (attribute._dbus_interface
1096
.replace(orig_interface_name,
1097
alt_interface_name))
1098
interface_names.add(alt_interface)
950
.replace("se.recompile.Mandos",
951
"se.bsnet.fukt.Mandos"))
1099
952
# Is this a D-Bus signal?
1100
953
if getattr(attribute, "_dbus_is_signal", False):
1101
# Extract the original non-method undecorated
1102
# function by black magic
954
# Extract the original non-method function by
1103
956
nonmethod_func = (dict(
1104
957
zip(attribute.func_code.co_freevars,
1105
958
attribute.__closure__))["func"]
1116
969
nonmethod_func.func_name,
1117
970
nonmethod_func.func_defaults,
1118
971
nonmethod_func.func_closure)))
1119
# Copy annotations, if any
1121
new_function._dbus_annotations = (
1122
dict(attribute._dbus_annotations))
1123
except AttributeError:
1125
972
# Define a creator of a function to call both the
1126
# original and alternate functions, so both the
1127
# original and alternate signals gets sent when
1128
# the function is called
973
# old and new functions, so both the old and new
974
# signals gets sent when the function is called
1129
975
def fixscope(func1, func2):
1130
976
"""This function is a scope container to pass
1131
977
func1 and func2 to the "call_both" function
1180
1021
attribute.func_name,
1181
1022
attribute.func_defaults,
1182
1023
attribute.func_closure)))
1183
# Copy annotations, if any
1185
attr[attrname]._dbus_annotations = (
1186
dict(attribute._dbus_annotations))
1187
except AttributeError:
1189
# Is this a D-Bus interface?
1190
elif getattr(attribute, "_dbus_is_interface", False):
1191
# Create a new, but exactly alike, function
1192
# object. Decorate it to be a new D-Bus interface
1193
# with the alternate D-Bus interface name. Add it
1195
attr[attrname] = (dbus_interface_annotations
1198
(attribute.func_code,
1199
attribute.func_globals,
1200
attribute.func_name,
1201
attribute.func_defaults,
1202
attribute.func_closure)))
1204
# Deprecate all alternate interfaces
1205
iname="_AlternateDBusNames_interface_annotation{0}"
1206
for interface_name in interface_names:
1207
@dbus_interface_annotations(interface_name)
1209
return { "org.freedesktop.DBus.Deprecated":
1211
# Find an unused name
1212
for aname in (iname.format(i)
1213
for i in itertools.count()):
1214
if aname not in attr:
1218
# Replace the class with a new subclass of it with
1219
# methods, signals, etc. as created above.
1220
cls = type(b"{0}Alternate".format(cls.__name__),
1226
@alternate_dbus_interfaces({"se.recompile.Mandos":
1227
"se.bsnet.fukt.Mandos"})
1024
return type.__new__(mcs, name, bases, attr)
1228
1027
class ClientDBus(Client, DBusObjectWithProperties):
1229
1028
"""A Client class using D-Bus
1560
1357
def Timeout_dbus_property(self, value=None):
1561
1358
if value is None: # get
1562
1359
return dbus.UInt64(self.timeout_milliseconds())
1563
old_timeout = self.timeout
1564
1360
self.timeout = datetime.timedelta(0, 0, 0, value)
1565
# Reschedule disabling
1567
now = datetime.datetime.utcnow()
1568
self.expires += self.timeout - old_timeout
1569
if self.expires <= now:
1570
# The timeout has passed
1573
if (getattr(self, "disable_initiator_tag", None)
1576
gobject.source_remove(self.disable_initiator_tag)
1577
self.disable_initiator_tag = (
1578
gobject.timeout_add(
1579
timedelta_to_milliseconds(self.expires - now),
1361
if getattr(self, "disable_initiator_tag", None) is None:
1363
# Reschedule timeout
1364
gobject.source_remove(self.disable_initiator_tag)
1365
self.disable_initiator_tag = None
1367
time_to_die = timedelta_to_milliseconds((self
1372
if time_to_die <= 0:
1373
# The timeout has passed
1376
self.expires = (datetime.datetime.utcnow()
1377
+ datetime.timedelta(milliseconds =
1379
self.disable_initiator_tag = (gobject.timeout_add
1380
(time_to_die, self.disable))
1582
1382
# ExtendedTimeout - property
1583
1383
@dbus_service_property(_interface, signature="t",
1929
1736
use_ipv6: Boolean; to use IPv6 or not
1931
1738
def __init__(self, server_address, RequestHandlerClass,
1932
interface=None, use_ipv6=True, socketfd=None):
1933
"""If socketfd is set, use that file descriptor instead of
1934
creating a new one with socket.socket().
1739
interface=None, use_ipv6=True):
1936
1740
self.interface = interface
1938
1742
self.address_family = socket.AF_INET6
1939
if socketfd is not None:
1940
# Save the file descriptor
1941
self.socketfd = socketfd
1942
# Save the original socket.socket() function
1943
self.socket_socket = socket.socket
1944
# To implement --socket, we monkey patch socket.socket.
1946
# (When socketserver.TCPServer is a new-style class, we
1947
# could make self.socket into a property instead of monkey
1948
# patching socket.socket.)
1950
# Create a one-time-only replacement for socket.socket()
1951
@functools.wraps(socket.socket)
1952
def socket_wrapper(*args, **kwargs):
1953
# Restore original function so subsequent calls are
1955
socket.socket = self.socket_socket
1956
del self.socket_socket
1957
# This time only, return a new socket object from the
1958
# saved file descriptor.
1959
return socket.fromfd(self.socketfd, *args, **kwargs)
1960
# Replace socket.socket() function with wrapper
1961
socket.socket = socket_wrapper
1962
# The socketserver.TCPServer.__init__ will call
1963
# socket.socket(), which might be our replacement,
1964
# socket_wrapper(), if socketfd was set.
1965
1743
socketserver.TCPServer.__init__(self, server_address,
1966
1744
RequestHandlerClass)
1968
1745
def server_bind(self):
1969
1746
"""This overrides the normal server_bind() function
1970
1747
to bind to an interface if one was specified, and also NOT to
1979
1756
self.socket.setsockopt(socket.SOL_SOCKET,
1980
1757
SO_BINDTODEVICE,
1981
str(self.interface + '\0'))
1982
1760
except socket.error as error:
1983
if error.errno == errno.EPERM:
1984
logger.error("No permission to bind to"
1985
" interface %s", self.interface)
1986
elif error.errno == errno.ENOPROTOOPT:
1761
if error[0] == errno.EPERM:
1762
logger.error("No permission to"
1763
" bind to interface %s",
1765
elif error[0] == errno.ENOPROTOOPT:
1987
1766
logger.error("SO_BINDTODEVICE not available;"
1988
1767
" cannot bind to interface %s",
1989
1768
self.interface)
1990
elif error.errno == errno.ENODEV:
1991
logger.error("Interface %s does not exist,"
1992
" cannot bind", self.interface)
1995
1771
# Only bind(2) the socket if we really need to.
2056
1831
def handle_ipc(self, source, condition, parent_pipe=None,
2057
1832
proc = None, client_object=None):
1834
gobject.IO_IN: "IN", # There is data to read.
1835
gobject.IO_OUT: "OUT", # Data can be written (without
1837
gobject.IO_PRI: "PRI", # There is urgent data to read.
1838
gobject.IO_ERR: "ERR", # Error condition.
1839
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1840
# broken, usually for pipes and
1843
conditions_string = ' | '.join(name
1845
condition_names.iteritems()
1846
if cond & condition)
2058
1847
# error, or the other end of multiprocessing.Pipe has closed
2059
if condition & (gobject.IO_ERR | gobject.IO_HUP):
1848
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
2060
1849
# Wait for other process to exit
2123
def rfc3339_duration_to_delta(duration):
2124
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2126
>>> rfc3339_duration_to_delta("P7D")
2127
datetime.timedelta(7)
2128
>>> rfc3339_duration_to_delta("PT60S")
2129
datetime.timedelta(0, 60)
2130
>>> rfc3339_duration_to_delta("PT60M")
2131
datetime.timedelta(0, 3600)
2132
>>> rfc3339_duration_to_delta("PT24H")
2133
datetime.timedelta(1)
2134
>>> rfc3339_duration_to_delta("P1W")
2135
datetime.timedelta(7)
2136
>>> rfc3339_duration_to_delta("PT5M30S")
2137
datetime.timedelta(0, 330)
2138
>>> rfc3339_duration_to_delta("P1DT3M20S")
2139
datetime.timedelta(1, 200)
2142
# Parsing an RFC 3339 duration with regular expressions is not
2143
# possible - there would have to be multiple places for the same
2144
# values, like seconds. The current code, while more esoteric, is
2145
# cleaner without depending on a parsing library. If Python had a
2146
# built-in library for parsing we would use it, but we'd like to
2147
# avoid excessive use of external libraries.
2149
# New type for defining tokens, syntax, and semantics all-in-one
2150
Token = collections.namedtuple("Token",
2151
("regexp", # To match token; if
2152
# "value" is not None,
2153
# must have a "group"
2155
"value", # datetime.timedelta or
2157
"followers")) # Tokens valid after
2159
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2160
# the "duration" ABNF definition in RFC 3339, Appendix A.
2161
token_end = Token(re.compile(r"$"), None, frozenset())
2162
token_second = Token(re.compile(r"(\d+)S"),
2163
datetime.timedelta(seconds=1),
2164
frozenset((token_end,)))
2165
token_minute = Token(re.compile(r"(\d+)M"),
2166
datetime.timedelta(minutes=1),
2167
frozenset((token_second, token_end)))
2168
token_hour = Token(re.compile(r"(\d+)H"),
2169
datetime.timedelta(hours=1),
2170
frozenset((token_minute, token_end)))
2171
token_time = Token(re.compile(r"T"),
2173
frozenset((token_hour, token_minute,
2175
token_day = Token(re.compile(r"(\d+)D"),
2176
datetime.timedelta(days=1),
2177
frozenset((token_time, token_end)))
2178
token_month = Token(re.compile(r"(\d+)M"),
2179
datetime.timedelta(weeks=4),
2180
frozenset((token_day, token_end)))
2181
token_year = Token(re.compile(r"(\d+)Y"),
2182
datetime.timedelta(weeks=52),
2183
frozenset((token_month, token_end)))
2184
token_week = Token(re.compile(r"(\d+)W"),
2185
datetime.timedelta(weeks=1),
2186
frozenset((token_end,)))
2187
token_duration = Token(re.compile(r"P"), None,
2188
frozenset((token_year, token_month,
2189
token_day, token_time,
2191
# Define starting values
2192
value = datetime.timedelta() # Value so far
2194
followers = frozenset(token_duration,) # Following valid tokens
2195
s = duration # String left to parse
2196
# Loop until end token is found
2197
while found_token is not token_end:
2198
# Search for any currently valid tokens
2199
for token in followers:
2200
match = token.regexp.match(s)
2201
if match is not None:
2203
if token.value is not None:
2204
# Value found, parse digits
2205
factor = int(match.group(1), 10)
2206
# Add to value so far
2207
value += factor * token.value
2208
# Strip token from string
2209
s = token.regexp.sub("", s, 1)
2212
# Set valid next tokens
2213
followers = found_token.followers
2216
# No currently valid tokens were found
2217
raise ValueError("Invalid RFC 3339 duration")
2222
1912
def string_to_delta(interval):
2223
1913
"""Parse a string and return a datetime.timedelta
2323
2006
parser.add_argument("--no-dbus", action="store_false",
2324
2007
dest="use_dbus", help="Do not provide D-Bus"
2325
" system bus interface", default=None)
2008
" system bus interface")
2326
2009
parser.add_argument("--no-ipv6", action="store_false",
2327
dest="use_ipv6", help="Do not use IPv6",
2010
dest="use_ipv6", help="Do not use IPv6")
2329
2011
parser.add_argument("--no-restore", action="store_false",
2330
2012
dest="restore", help="Do not restore stored"
2331
" state", default=None)
2332
parser.add_argument("--socket", type=int,
2333
help="Specify a file descriptor to a network"
2334
" socket to use instead of creating one")
2335
2014
parser.add_argument("--statedir", metavar="DIR",
2336
2015
help="Directory to save/restore state in")
2337
parser.add_argument("--foreground", action="store_true",
2338
help="Run in foreground", default=None)
2340
2017
options = parser.parse_args()
2369
2044
# Convert the SafeConfigParser object to a dict
2370
2045
server_settings = server_config.defaults()
2371
2046
# Use the appropriate methods on the non-string config options
2372
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
2047
for option in ("debug", "use_dbus", "use_ipv6"):
2373
2048
server_settings[option] = server_config.getboolean("DEFAULT",
2375
2050
if server_settings["port"]:
2376
2051
server_settings["port"] = server_config.getint("DEFAULT",
2378
if server_settings["socket"]:
2379
server_settings["socket"] = server_config.getint("DEFAULT",
2381
# Later, stdin will, and stdout and stderr might, be dup'ed
2382
# over with an opened os.devnull. But we don't want this to
2383
# happen with a supplied network socket.
2384
if 0 <= server_settings["socket"] <= 2:
2385
server_settings["socket"] = os.dup(server_settings
2387
2053
del server_config
2389
2055
# Override the settings from the config file with command line
2453
2109
use_ipv6=use_ipv6,
2454
2110
gnutls_priority=
2455
2111
server_settings["priority"],
2457
socketfd=(server_settings["socket"]
2460
pidfilename = "/run/mandos.pid"
2461
if not os.path.isdir("/run/."):
2462
pidfilename = "/var/run/mandos.pid"
2114
pidfilename = "/var/run/mandos.pid"
2465
2116
pidfile = open(pidfilename, "w")
2466
except IOError as e:
2467
logger.error("Could not open file %r", pidfilename,
2118
logger.error("Could not open file %r", pidfilename)
2470
for name in ("_mandos", "mandos", "nobody"):
2121
uid = pwd.getpwnam("_mandos").pw_uid
2122
gid = pwd.getpwnam("_mandos").pw_gid
2472
uid = pwd.getpwnam(name).pw_uid
2473
gid = pwd.getpwnam(name).pw_gid
2125
uid = pwd.getpwnam("mandos").pw_uid
2126
gid = pwd.getpwnam("mandos").pw_gid
2475
2127
except KeyError:
2129
uid = pwd.getpwnam("nobody").pw_uid
2130
gid = pwd.getpwnam("nobody").pw_gid
2483
2137
except OSError as error:
2484
if error.errno != errno.EPERM:
2138
if error[0] != errno.EPERM:
2488
2142
# Enable all possible GnuTLS debugging
2499
2153
.gnutls_global_set_log_function(debug_gnutls))
2501
2155
# Redirect stdin so all checkers get /dev/null
2502
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2156
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2503
2157
os.dup2(null, sys.stdin.fileno())
2507
2161
# Need to fork before connecting to D-Bus
2509
2163
# Close all input and output, do double fork, etc.
2512
# multiprocessing will use threads, so before we use gobject we
2513
# need to inform gobject that threads will be used.
2514
2166
gobject.threads_init()
2516
2168
global main_loop
2517
2169
# From the Avahi example code
2518
DBusGMainLoop(set_as_default=True)
2170
DBusGMainLoop(set_as_default=True )
2519
2171
main_loop = gobject.MainLoop()
2520
2172
bus = dbus.SystemBus()
2521
2173
# End of Avahi example code
2567
2212
(stored_state))
2568
2213
os.remove(stored_state_path)
2569
2214
except IOError as e:
2570
if e.errno == errno.ENOENT:
2571
logger.warning("Could not load persistent state: {0}"
2572
.format(os.strerror(e.errno)))
2574
logger.critical("Could not load persistent state:",
2215
logger.warning("Could not load persistent state: {0}"
2217
if e.errno != errno.ENOENT:
2577
2219
except EOFError as e:
2578
2220
logger.warning("Could not load persistent state: "
2579
"EOFError:", exc_info=e)
2221
"EOFError: {0}".format(e))
2581
2223
with PGPEngine() as pgp:
2582
2224
for client_name, client in clients_data.iteritems():
2583
# Skip removed clients
2584
if client_name not in client_settings:
2587
2225
# Decide which value to use after restoring saved state.
2588
2226
# We have three different values: Old config file,
2589
2227
# new config file, and saved state.
2604
2242
# Clients who has passed its expire date can still be
2605
2243
# enabled if its last checker was successful. Clients
2606
# whose checker succeeded before we stored its state is
2607
# assumed to have successfully run all checkers during
2244
# whose checker failed before we stored its state is
2245
# assumed to have failed all checkers during downtime.
2609
2246
if client["enabled"]:
2610
2247
if datetime.datetime.utcnow() >= client["expires"]:
2611
2248
if not client["last_checked_ok"]:
2612
2249
logger.warning(
2613
2250
"disabling client {0} - Client never "
2614
"performed a successful checker"
2615
.format(client_name))
2251
"performed a successfull checker"
2252
.format(client["name"]))
2616
2253
client["enabled"] = False
2617
2254
elif client["last_checker_status"] != 0:
2618
2255
logger.warning(
2619
2256
"disabling client {0} - Client "
2620
2257
"last checker failed with error code {1}"
2621
.format(client_name,
2258
.format(client["name"],
2622
2259
client["last_checker_status"]))
2623
2260
client["enabled"] = False
2625
2262
client["expires"] = (datetime.datetime
2627
2264
+ client["timeout"])
2628
logger.debug("Last checker succeeded,"
2629
" keeping {0} enabled"
2630
.format(client_name))
2632
2267
client["secret"] = (
2633
2268
pgp.decrypt(client["encrypted_secret"],
2639
2274
.format(client_name))
2640
2275
client["secret"] = (
2641
2276
client_settings[client_name]["secret"])
2643
2279
# Add/remove clients based on new changes made to config
2644
for client_name in (set(old_client_settings)
2645
- set(client_settings)):
2280
for client_name in set(old_client_settings) - set(client_settings):
2646
2281
del clients_data[client_name]
2647
for client_name in (set(client_settings)
2648
- set(old_client_settings)):
2282
for client_name in set(client_settings) - set(old_client_settings):
2649
2283
clients_data[client_name] = client_settings[client_name]
2651
# Create all client objects
2285
# Create clients all clients
2652
2286
for client_name, client in clients_data.iteritems():
2653
2287
tcp_server.clients[client_name] = client_class(
2654
name = client_name, settings = client,
2655
server_settings = server_settings)
2288
name = client_name, settings = client)
2657
2290
if not tcp_server.clients:
2658
2291
logger.warning("No clients defined")
2661
if pidfile is not None:
2665
pidfile.write(str(pid) + "\n".encode("utf-8"))
2667
logger.error("Could not write to file %r with PID %d",
2297
pidfile.write(str(pid) + "\n".encode("utf-8"))
2300
logger.error("Could not write to file %r with PID %d",
2303
# "pidfile" was never created
2670
2305
del pidfilename
2306
signal.signal(signal.SIGINT, signal.SIG_IGN)
2672
2308
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2673
2309
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2676
@alternate_dbus_interfaces({"se.recompile.Mandos":
2677
"se.bsnet.fukt.Mandos"})
2678
class MandosDBusService(DBusObjectWithProperties):
2312
class MandosDBusService(dbus.service.Object):
2679
2313
"""A D-Bus proxy object"""
2680
2314
def __init__(self):
2681
2315
dbus.service.Object.__init__(self, bus, "/")
2682
2316
_interface = "se.recompile.Mandos"
2684
@dbus_interface_annotations(_interface)
2686
return { "org.freedesktop.DBus.Property"
2687
".EmitsChangedSignal":
2690
2318
@dbus.service.signal(_interface, signature="o")
2691
2319
def ClientAdded(self, objpath):
2774
2403
del client_settings[client.name]["secret"]
2777
with (tempfile.NamedTemporaryFile
2778
(mode='wb', suffix=".pickle", prefix='clients-',
2779
dir=os.path.dirname(stored_state_path),
2780
delete=False)) as stored_state:
2406
tempfd, tempname = tempfile.mkstemp(suffix=".pickle",
2409
(stored_state_path))
2410
with os.fdopen(tempfd, "wb") as stored_state:
2781
2411
pickle.dump((clients, client_settings), stored_state)
2782
tempname=stored_state.name
2783
2412
os.rename(tempname, stored_state_path)
2784
2413
except (IOError, OSError) as e:
2414
logger.warning("Could not save persistent state: {0}"
2787
2418
os.remove(tempname)
2788
2419
except NameError:
2790
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
2791
logger.warning("Could not save persistent state: {0}"
2792
.format(os.strerror(e.errno)))
2794
logger.warning("Could not save persistent state:",
2421
if e.errno not in set((errno.ENOENT, errno.EACCES,
2798
2425
# Delete all clients, and settings from config
2799
2426
while tcp_server.clients:
2826
2453
service.port = tcp_server.socket.getsockname()[1]
2828
2455
logger.info("Now listening on address %r, port %d,"
2829
" flowinfo %d, scope_id %d",
2830
*tcp_server.socket.getsockname())
2456
" flowinfo %d, scope_id %d"
2457
% tcp_server.socket.getsockname())
2832
logger.info("Now listening on address %r, port %d",
2833
*tcp_server.socket.getsockname())
2459
logger.info("Now listening on address %r, port %d"
2460
% tcp_server.socket.getsockname())
2835
2462
#service.interface = tcp_server.socket.getsockname()[3]