11
11
# "AvahiService" class, and some lines in "main".
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13
# Everything else is
14
# Copyright © 2008-2011 Teddy Hogeborn
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# Copyright © 2008-2011 Björn Påhlsson
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# Copyright © 2008-2012 Teddy Hogeborn
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# Copyright © 2008-2012 Björn Påhlsson
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17
# This program is free software: you can redistribute it and/or modify
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18
# it under the terms of the GNU General Public License as published by
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179
def encrypt(self, data, password):
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self.gnupg.passphrase = self.password_encode(password)
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with open(os.devnull) as devnull:
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with open(os.devnull, "w") as devnull:
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proc = self.gnupg.run(['--symmetric'],
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create_fhs=['stdin', 'stdout'],
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def decrypt(self, data, password):
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self.gnupg.passphrase = self.password_encode(password)
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with open(os.devnull) as devnull:
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with open(os.devnull, "w") as devnull:
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proc = self.gnupg.run(['--decrypt'],
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create_fhs=['stdin', 'stdout'],
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attach_fhs={'stderr': devnull})
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with contextlib.closing(proc.handles['stdin'] ) as f:
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with contextlib.closing(proc.handles['stdin']) as f:
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with contextlib.closing(proc.handles['stdout']) as f:
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decrypted_plaintext = f.read()
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self.server_state_changed)
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self.server_state_changed(self.server.GetState())
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383
class AvahiServiceToSyslog(AvahiService):
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def rename(self):
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"""Add the new name to the syslog messages"""
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ret = AvahiService.rename(self)
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syslogger.setFormatter(logging.Formatter
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('Mandos (%s) [%%(process)d]:'
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' %%(levelname)s: %%(message)s'
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('Mandos ({0}) [%(process)d]:'
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' %(levelname)s: %(message)s'
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def timedelta_to_milliseconds(td):
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"Convert a datetime.timedelta() to milliseconds"
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return ((td.days * 24 * 60 * 60 * 1000)
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+ (td.seconds * 1000)
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+ (td.microseconds // 1000))
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401
class Client(object):
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"""A representation of a client host served by this server.
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last_checked_ok: datetime.datetime(); (UTC) or None
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last_checker_status: integer between 0 and 255 reflecting exit
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status of last checker. -1 reflects crashed
431
checker, -2 means no checker completed yet.
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last_enabled: datetime.datetime(); (UTC) or None
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name: string; from the config file, used in log messages and
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D-Bus identifiers
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secret: bytestring; sent verbatim (over TLS) to client
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timeout: datetime.timedelta(); How long from last_checked_ok
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until this client is disabled
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extended_timeout: extra long timeout when password has been sent
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extended_timeout: extra long timeout when secret has been sent
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439
runtime_expansions: Allowed attributes for runtime expansion.
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expires: datetime.datetime(); time (UTC) when a client will be
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disabled, or None
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runtime_expansions = ("approval_delay", "approval_duration",
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"created", "enabled", "fingerprint",
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"host", "interval", "last_checked_ok",
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"created", "enabled", "expires",
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"fingerprint", "host", "interval",
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"last_approval_request", "last_checked_ok",
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"last_enabled", "name", "timeout")
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client_defaults = { "timeout": "5m",
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"extended_timeout": "15m",
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def approval_delay_milliseconds(self):
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return timedelta_to_milliseconds(self.approval_delay)
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def config_parser(config):
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""" Construct a new dict of client settings of this form:
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"""Construct a new dict of client settings of this form:
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{ client_name: {setting_name: value, ...}, ...}
465
with exceptions for any special settings as defined above"""
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with exceptions for any special settings as defined above.
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NOTE: Must be a pure function. Must return the same result
481
value given the same arguments.
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for client_name in config.sections():
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section = dict(config.items(client_name))
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client["checker_command"] = section["checker"]
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client["last_approval_request"] = None
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client["last_checked_ok"] = None
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client["last_checker_status"] = None
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if client["enabled"]:
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client["last_enabled"] = datetime.datetime.utcnow()
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client["expires"] = (datetime.datetime.utcnow()
506
client["last_enabled"] = None
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client["expires"] = None
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client["last_checker_status"] = -2
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522
def __init__(self, settings, name = None):
513
"""Note: the 'checker' key in 'config' sets the
514
'checker_command' attribute and *not* the 'checker'
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# adding all client settings
518
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for setting, value in settings.iteritems():
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setattr(self, setting, value)
529
if not hasattr(self, "last_enabled"):
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self.last_enabled = datetime.datetime.utcnow()
531
if not hasattr(self, "expires"):
532
self.expires = (datetime.datetime.utcnow()
535
self.last_enabled = None
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logger.debug("Creating client %r", self.name)
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# Uppercase and remove spaces from fingerprint for later
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# comparison purposes with return value from the fingerprint()
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logger.debug(" Fingerprint: %s", self.fingerprint)
526
self.created = settings.get("created", datetime.datetime.utcnow())
543
self.created = settings.get("created",
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datetime.datetime.utcnow())
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# attributes specific for this server instance
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self.checker = None
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self.checker_initiator_tag = None
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if getattr(self, "enabled", False):
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# Already enabled
561
self.send_changedstate()
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579
self.expires = datetime.datetime.utcnow() + self.timeout
563
580
self.enabled = True
564
581
self.last_enabled = datetime.datetime.utcnow()
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582
self.init_checker()
583
self.send_changedstate()
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def disable(self, quiet=True):
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"""Disable this client."""
569
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if not getattr(self, "enabled", False):
572
self.send_changedstate()
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logger.info("Disabling client %s", self.name)
575
if getattr(self, "disable_initiator_tag", False):
591
if getattr(self, "disable_initiator_tag", None) is not None:
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gobject.source_remove(self.disable_initiator_tag)
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self.disable_initiator_tag = None
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self.expires = None
579
if getattr(self, "checker_initiator_tag", False):
595
if getattr(self, "checker_initiator_tag", None) is not None:
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gobject.source_remove(self.checker_initiator_tag)
581
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self.checker_initiator_tag = None
582
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self.stop_checker()
583
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self.enabled = False
601
self.send_changedstate()
584
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# Do not run this again if called by a gobject.timeout_add
590
608
def init_checker(self):
591
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# Schedule a new checker to be started an 'interval' from now,
592
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# and every interval from then on.
611
if self.checker_initiator_tag is not None:
612
gobject.source_remove(self.checker_initiator_tag)
593
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self.checker_initiator_tag = (gobject.timeout_add
594
614
(self.interval_milliseconds(),
595
615
self.start_checker))
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# Schedule a disable() when 'timeout' has passed
617
if self.disable_initiator_tag is not None:
618
gobject.source_remove(self.disable_initiator_tag)
597
619
self.disable_initiator_tag = (gobject.timeout_add
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(self.timeout_milliseconds(),
618
640
logger.warning("Checker for %(name)s crashed?",
621
def checked_ok(self, timeout=None):
622
"""Bump up the timeout for this client.
624
This should only be called when the client has been seen,
643
def checked_ok(self):
644
"""Assert that the client has been seen, alive and well."""
645
self.last_checked_ok = datetime.datetime.utcnow()
646
self.last_checker_status = 0
649
def bump_timeout(self, timeout=None):
650
"""Bump up the timeout for this client."""
627
651
if timeout is None:
628
652
timeout = self.timeout
629
self.last_checked_ok = datetime.datetime.utcnow()
630
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if self.disable_initiator_tag is not None:
631
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gobject.source_remove(self.disable_initiator_tag)
655
self.disable_initiator_tag = None
632
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if getattr(self, "enabled", False):
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self.disable_initiator_tag = (gobject.timeout_add
634
658
(timedelta_to_milliseconds
644
668
If a checker already exists, leave it running and do
646
670
# The reason for not killing a running checker is that if we
647
# did that, then if a checker (for some reason) started
648
# running slowly and taking more than 'interval' time, the
649
# client would inevitably timeout, since no checker would get
650
# a chance to run to completion. If we instead leave running
671
# did that, and if a checker (for some reason) started running
672
# slowly and taking more than 'interval' time, then the client
673
# would inevitably timeout, since no checker would get a
674
# chance to run to completion. If we instead leave running
651
675
# checkers alone, the checker would have to take more time
652
676
# than 'timeout' for the client to be disabled, which is as it
667
691
self.current_checker_command)
668
692
# Start a new checker if needed
669
693
if self.checker is None:
694
# Escape attributes for the shell
695
escaped_attrs = dict(
696
(attr, re.escape(unicode(getattr(self, attr))))
698
self.runtime_expansions)
671
# In case checker_command has exactly one % operator
672
command = self.checker_command % self.host
674
# Escape attributes for the shell
675
escaped_attrs = dict(
677
re.escape(unicode(str(getattr(self, attr, "")),
681
self.runtime_expansions)
684
command = self.checker_command % escaped_attrs
685
except TypeError as error:
686
logger.error('Could not format string "%s":'
687
' %s', self.checker_command, error)
688
return True # Try again later
700
command = self.checker_command % escaped_attrs
701
except TypeError as error:
702
logger.error('Could not format string "%s"',
703
self.checker_command, exc_info=error)
704
return True # Try again later
689
705
self.current_checker_command = command
691
707
logger.info("Starting checker %r for %s",
697
713
self.checker = subprocess.Popen(command,
699
715
shell=True, cwd="/")
700
self.checker_callback_tag = (gobject.child_watch_add
702
self.checker_callback,
704
# The checker may have completed before the gobject
705
# watch was added. Check for this.
706
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
708
gobject.source_remove(self.checker_callback_tag)
709
self.checker_callback(pid, status, command)
710
716
except OSError as error:
711
logger.error("Failed to start subprocess: %s",
717
logger.error("Failed to start subprocess",
719
self.checker_callback_tag = (gobject.child_watch_add
721
self.checker_callback,
723
# The checker may have completed before the gobject
724
# watch was added. Check for this.
725
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
727
gobject.source_remove(self.checker_callback_tag)
728
self.checker_callback(pid, status, command)
713
729
# Re-run this periodically if run by gobject.timeout_add
781
def dbus_interface_annotations(dbus_interface):
782
"""Decorator for marking functions returning interface annotations
786
@dbus_interface_annotations("org.example.Interface")
787
def _foo(self): # Function name does not matter
788
return {"org.freedesktop.DBus.Deprecated": "true",
789
"org.freedesktop.DBus.Property.EmitsChangedSignal":
793
func._dbus_is_interface = True
794
func._dbus_interface = dbus_interface
795
func._dbus_name = dbus_interface
800
def dbus_annotations(annotations):
801
"""Decorator to annotate D-Bus methods, signals or properties
804
@dbus_service_property("org.example.Interface", signature="b",
806
@dbus_annotations({{"org.freedesktop.DBus.Deprecated": "true",
807
"org.freedesktop.DBus.Property."
808
"EmitsChangedSignal": "false"})
809
def Property_dbus_property(self):
810
return dbus.Boolean(False)
813
func._dbus_annotations = annotations
765
818
class DBusPropertyException(dbus.exceptions.DBusException):
766
819
"""A base class for D-Bus property-related exceptions
793
def _is_dbus_property(obj):
794
return getattr(obj, "_dbus_is_property", False)
846
def _is_dbus_thing(thing):
847
"""Returns a function testing if an attribute is a D-Bus thing
849
If called like _is_dbus_thing("method") it returns a function
850
suitable for use as predicate to inspect.getmembers().
852
return lambda obj: getattr(obj, "_dbus_is_{0}".format(thing),
796
def _get_all_dbus_properties(self):
855
def _get_all_dbus_things(self, thing):
797
856
"""Returns a generator of (name, attribute) pairs
799
return ((prop.__get__(self)._dbus_name, prop.__get__(self))
858
return ((getattr(athing.__get__(self), "_dbus_name",
860
athing.__get__(self))
800
861
for cls in self.__class__.__mro__
802
inspect.getmembers(cls, self._is_dbus_property))
863
inspect.getmembers(cls,
864
self._is_dbus_thing(thing)))
804
866
def _get_dbus_property(self, interface_name, property_name):
805
867
"""Returns a bound method if one exists which is a D-Bus
808
870
for cls in self.__class__.__mro__:
809
871
for name, value in (inspect.getmembers
810
(cls, self._is_dbus_property)):
873
self._is_dbus_thing("property"))):
811
874
if (value._dbus_name == property_name
812
875
and value._dbus_interface == interface_name):
813
876
return value.__get__(self)
876
939
path_keyword='object_path',
877
940
connection_keyword='connection')
878
941
def Introspect(self, object_path, connection):
879
"""Standard D-Bus method, overloaded to insert property tags.
942
"""Overloading of standard D-Bus method.
944
Inserts property tags and interface annotation tags.
881
946
xmlstring = dbus.service.Object.Introspect(self, object_path,
889
954
e.setAttribute("access", prop._dbus_access)
891
956
for if_tag in document.getElementsByTagName("interface"):
892
958
for tag in (make_tag(document, name, prop)
894
in self._get_all_dbus_properties()
960
in self._get_all_dbus_things("property")
895
961
if prop._dbus_interface
896
962
== if_tag.getAttribute("name")):
897
963
if_tag.appendChild(tag)
964
# Add annotation tags
965
for typ in ("method", "signal", "property"):
966
for tag in if_tag.getElementsByTagName(typ):
968
for name, prop in (self.
969
_get_all_dbus_things(typ)):
970
if (name == tag.getAttribute("name")
971
and prop._dbus_interface
972
== if_tag.getAttribute("name")):
973
annots.update(getattr
977
for name, value in annots.iteritems():
978
ann_tag = document.createElement(
980
ann_tag.setAttribute("name", name)
981
ann_tag.setAttribute("value", value)
982
tag.appendChild(ann_tag)
983
# Add interface annotation tags
984
for annotation, value in dict(
985
itertools.chain.from_iterable(
986
annotations().iteritems()
987
for name, annotations in
988
self._get_all_dbus_things("interface")
989
if name == if_tag.getAttribute("name")
991
ann_tag = document.createElement("annotation")
992
ann_tag.setAttribute("name", annotation)
993
ann_tag.setAttribute("value", value)
994
if_tag.appendChild(ann_tag)
898
995
# Add the names to the return values for the
899
996
# "org.freedesktop.DBus.Properties" methods
900
997
if (if_tag.getAttribute("name")
915
1012
except (AttributeError, xml.dom.DOMException,
916
1013
xml.parsers.expat.ExpatError) as error:
917
1014
logger.error("Failed to override Introspection method",
919
1016
return xmlstring
922
def datetime_to_dbus (dt, variant_level=0):
1019
def datetime_to_dbus(dt, variant_level=0):
923
1020
"""Convert a UTC datetime.datetime() to a D-Bus type."""
925
1022
return dbus.String("", variant_level = variant_level)
927
1024
variant_level=variant_level)
930
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
932
"""Applied to an empty subclass of a D-Bus object, this metaclass
933
will add additional D-Bus attributes matching a certain pattern.
1027
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1028
"""A class decorator; applied to a subclass of
1029
dbus.service.Object, it will add alternate D-Bus attributes with
1030
interface names according to the "alt_interface_names" mapping.
1033
@alternate_dbus_interfaces({"org.example.Interface":
1034
"net.example.AlternateInterface"})
1035
class SampleDBusObject(dbus.service.Object):
1036
@dbus.service.method("org.example.Interface")
1037
def SampleDBusMethod():
1040
The above "SampleDBusMethod" on "SampleDBusObject" will be
1041
reachable via two interfaces: "org.example.Interface" and
1042
"net.example.AlternateInterface", the latter of which will have
1043
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1044
"true", unless "deprecate" is passed with a False value.
1046
This works for methods and signals, and also for D-Bus properties
1047
(from DBusObjectWithProperties) and interfaces (from the
1048
dbus_interface_annotations decorator).
935
def __new__(mcs, name, bases, attr):
936
# Go through all the base classes which could have D-Bus
937
# methods, signals, or properties in them
938
for base in (b for b in bases
939
if issubclass(b, dbus.service.Object)):
940
# Go though all attributes of the base class
941
for attrname, attribute in inspect.getmembers(base):
1051
for orig_interface_name, alt_interface_name in (
1052
alt_interface_names.iteritems()):
1054
interface_names = set()
1055
# Go though all attributes of the class
1056
for attrname, attribute in inspect.getmembers(cls):
942
1057
# Ignore non-D-Bus attributes, and D-Bus attributes
943
1058
# with the wrong interface name
944
1059
if (not hasattr(attribute, "_dbus_interface")
945
1060
or not attribute._dbus_interface
946
.startswith("se.recompile.Mandos")):
1061
.startswith(orig_interface_name)):
948
1063
# Create an alternate D-Bus interface name based on
949
1064
# the current name
950
1065
alt_interface = (attribute._dbus_interface
951
.replace("se.recompile.Mandos",
952
"se.bsnet.fukt.Mandos"))
1066
.replace(orig_interface_name,
1067
alt_interface_name))
1068
interface_names.add(alt_interface)
953
1069
# Is this a D-Bus signal?
954
1070
if getattr(attribute, "_dbus_is_signal", False):
955
1071
# Extract the original non-method function by
970
1086
nonmethod_func.func_name,
971
1087
nonmethod_func.func_defaults,
972
1088
nonmethod_func.func_closure)))
1089
# Copy annotations, if any
1091
new_function._dbus_annotations = (
1092
dict(attribute._dbus_annotations))
1093
except AttributeError:
973
1095
# Define a creator of a function to call both the
974
# old and new functions, so both the old and new
975
# signals gets sent when the function is called
1096
# original and alternate functions, so both the
1097
# original and alternate signals gets sent when
1098
# the function is called
976
1099
def fixscope(func1, func2):
977
1100
"""This function is a scope container to pass
978
1101
func1 and func2 to the "call_both" function
985
1108
return call_both
986
1109
# Create the "call_both" function and add it to
988
attr[attrname] = fixscope(attribute,
1111
attr[attrname] = fixscope(attribute, new_function)
990
1112
# Is this a D-Bus method?
991
1113
elif getattr(attribute, "_dbus_is_method", False):
992
1114
# Create a new, but exactly alike, function
1003
1125
attribute.func_name,
1004
1126
attribute.func_defaults,
1005
1127
attribute.func_closure)))
1128
# Copy annotations, if any
1130
attr[attrname]._dbus_annotations = (
1131
dict(attribute._dbus_annotations))
1132
except AttributeError:
1006
1134
# Is this a D-Bus property?
1007
1135
elif getattr(attribute, "_dbus_is_property", False):
1008
1136
# Create a new, but exactly alike, function
1022
1150
attribute.func_name,
1023
1151
attribute.func_defaults,
1024
1152
attribute.func_closure)))
1025
return type.__new__(mcs, name, bases, attr)
1153
# Copy annotations, if any
1155
attr[attrname]._dbus_annotations = (
1156
dict(attribute._dbus_annotations))
1157
except AttributeError:
1159
# Is this a D-Bus interface?
1160
elif getattr(attribute, "_dbus_is_interface", False):
1161
# Create a new, but exactly alike, function
1162
# object. Decorate it to be a new D-Bus interface
1163
# with the alternate D-Bus interface name. Add it
1165
attr[attrname] = (dbus_interface_annotations
1168
(attribute.func_code,
1169
attribute.func_globals,
1170
attribute.func_name,
1171
attribute.func_defaults,
1172
attribute.func_closure)))
1174
# Deprecate all alternate interfaces
1175
iname="_AlternateDBusNames_interface_annotation{0}"
1176
for interface_name in interface_names:
1177
@dbus_interface_annotations(interface_name)
1179
return { "org.freedesktop.DBus.Deprecated":
1181
# Find an unused name
1182
for aname in (iname.format(i)
1183
for i in itertools.count()):
1184
if aname not in attr:
1188
# Replace the class with a new subclass of it with
1189
# methods, signals, etc. as created above.
1190
cls = type(b"{0}Alternate".format(cls.__name__),
1196
@alternate_dbus_interfaces({"se.recompile.Mandos":
1197
"se.bsnet.fukt.Mandos"})
1028
1198
class ClientDBus(Client, DBusObjectWithProperties):
1029
1199
"""A Client class using D-Bus
1041
1211
def __init__(self, bus = None, *args, **kwargs):
1043
1213
Client.__init__(self, *args, **kwargs)
1044
self._approvals_pending = 0
1046
self._approvals_pending = 0
1047
1214
# Only now, when this client is initialized, can it show up on
1049
1216
client_object_name = unicode(self.name).translate(
1170
1338
def approve(self, value=True):
1171
self.send_changedstate()
1172
1339
self.approved = value
1173
1340
gobject.timeout_add(timedelta_to_milliseconds
1174
1341
(self.approval_duration),
1175
1342
self._reset_approved)
1343
self.send_changedstate()
1178
1345
## D-Bus methods, signals & properties
1179
1346
_interface = "se.recompile.Mandos.Client"
1350
@dbus_interface_annotations(_interface)
1352
return { "org.freedesktop.DBus.Property.EmitsChangedSignal":
1183
1357
# CheckerCompleted - signal
1343
1509
return datetime_to_dbus(self.last_checked_ok)
1511
# LastCheckerStatus - property
1512
@dbus_service_property(_interface, signature="n",
1514
def LastCheckerStatus_dbus_property(self):
1515
return dbus.Int16(self.last_checker_status)
1345
1517
# Expires - property
1346
1518
@dbus_service_property(_interface, signature="s", access="read")
1347
1519
def Expires_dbus_property(self):
1358
1530
def Timeout_dbus_property(self, value=None):
1359
1531
if value is None: # get
1360
1532
return dbus.UInt64(self.timeout_milliseconds())
1533
old_timeout = self.timeout
1361
1534
self.timeout = datetime.timedelta(0, 0, 0, value)
1362
if getattr(self, "disable_initiator_tag", None) is None:
1364
# Reschedule timeout
1365
gobject.source_remove(self.disable_initiator_tag)
1366
self.disable_initiator_tag = None
1368
time_to_die = timedelta_to_milliseconds((self
1373
if time_to_die <= 0:
1374
# The timeout has passed
1377
self.expires = (datetime.datetime.utcnow()
1378
+ datetime.timedelta(milliseconds =
1380
self.disable_initiator_tag = (gobject.timeout_add
1381
(time_to_die, self.disable))
1535
# Reschedule disabling
1537
now = datetime.datetime.utcnow()
1538
self.expires += self.timeout - old_timeout
1539
if self.expires <= now:
1540
# The timeout has passed
1543
if (getattr(self, "disable_initiator_tag", None)
1546
gobject.source_remove(self.disable_initiator_tag)
1547
self.disable_initiator_tag = (
1548
gobject.timeout_add(
1549
timedelta_to_milliseconds(self.expires - now),
1383
1552
# ExtendedTimeout - property
1384
1553
@dbus_service_property(_interface, signature="t",
1580
1741
#wait until timeout or approved
1581
1742
time = datetime.datetime.now()
1582
1743
client.changedstate.acquire()
1583
(client.changedstate.wait
1584
(float(client.timedelta_to_milliseconds(delay)
1744
client.changedstate.wait(
1745
float(timedelta_to_milliseconds(delay)
1586
1747
client.changedstate.release()
1587
1748
time2 = datetime.datetime.now()
1588
1749
if (time2 - time) >= delay:
1737
1899
use_ipv6: Boolean; to use IPv6 or not
1739
1901
def __init__(self, server_address, RequestHandlerClass,
1740
interface=None, use_ipv6=True):
1902
interface=None, use_ipv6=True, socketfd=None):
1903
"""If socketfd is set, use that file descriptor instead of
1904
creating a new one with socket.socket().
1741
1906
self.interface = interface
1743
1908
self.address_family = socket.AF_INET6
1909
if socketfd is not None:
1910
# Save the file descriptor
1911
self.socketfd = socketfd
1912
# Save the original socket.socket() function
1913
self.socket_socket = socket.socket
1914
# To implement --socket, we monkey patch socket.socket.
1916
# (When socketserver.TCPServer is a new-style class, we
1917
# could make self.socket into a property instead of monkey
1918
# patching socket.socket.)
1920
# Create a one-time-only replacement for socket.socket()
1921
@functools.wraps(socket.socket)
1922
def socket_wrapper(*args, **kwargs):
1923
# Restore original function so subsequent calls are
1925
socket.socket = self.socket_socket
1926
del self.socket_socket
1927
# This time only, return a new socket object from the
1928
# saved file descriptor.
1929
return socket.fromfd(self.socketfd, *args, **kwargs)
1930
# Replace socket.socket() function with wrapper
1931
socket.socket = socket_wrapper
1932
# The socketserver.TCPServer.__init__ will call
1933
# socket.socket(), which might be our replacement,
1934
# socket_wrapper(), if socketfd was set.
1744
1935
socketserver.TCPServer.__init__(self, server_address,
1745
1936
RequestHandlerClass)
1746
1938
def server_bind(self):
1747
1939
"""This overrides the normal server_bind() function
1748
1940
to bind to an interface if one was specified, and also NOT to
1759
1951
str(self.interface
1761
1953
except socket.error as error:
1762
if error[0] == errno.EPERM:
1954
if error.errno == errno.EPERM:
1763
1955
logger.error("No permission to"
1764
1956
" bind to interface %s",
1765
1957
self.interface)
1766
elif error[0] == errno.ENOPROTOOPT:
1958
elif error.errno == errno.ENOPROTOOPT:
1767
1959
logger.error("SO_BINDTODEVICE not available;"
1768
1960
" cannot bind to interface %s",
1769
1961
self.interface)
1962
elif error.errno == errno.ENODEV:
1963
logger.error("Interface %s does not"
1964
" exist, cannot bind",
1772
1968
# Only bind(2) the socket if we really need to.
1803
1999
def __init__(self, server_address, RequestHandlerClass,
1804
2000
interface=None, use_ipv6=True, clients=None,
1805
gnutls_priority=None, use_dbus=True):
2001
gnutls_priority=None, use_dbus=True, socketfd=None):
1806
2002
self.enabled = False
1807
2003
self.clients = clients
1808
2004
if self.clients is None:
1832
2029
def handle_ipc(self, source, condition, parent_pipe=None,
1833
2030
proc = None, client_object=None):
1835
gobject.IO_IN: "IN", # There is data to read.
1836
gobject.IO_OUT: "OUT", # Data can be written (without
1838
gobject.IO_PRI: "PRI", # There is urgent data to read.
1839
gobject.IO_ERR: "ERR", # Error condition.
1840
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1841
# broken, usually for pipes and
1844
conditions_string = ' | '.join(name
1846
condition_names.iteritems()
1847
if cond & condition)
1848
2031
# error, or the other end of multiprocessing.Pipe has closed
1849
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
2032
if condition & (gobject.IO_ERR | gobject.IO_HUP):
1850
2033
# Wait for other process to exit
1942
2125
elif suffix == "w":
1943
2126
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1945
raise ValueError("Unknown suffix %r" % suffix)
2128
raise ValueError("Unknown suffix {0!r}"
1946
2130
except (ValueError, IndexError) as e:
1947
2131
raise ValueError(*(e.args))
1948
2132
timevalue += delta
1963
2147
if not noclose:
1964
2148
# Close all standard open file descriptors
1965
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2149
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1966
2150
if not stat.S_ISCHR(os.fstat(null).st_mode):
1967
2151
raise OSError(errno.ENODEV,
1968
"%s not a character device"
2152
"{0} not a character device"
2153
.format(os.devnull))
1970
2154
os.dup2(null, sys.stdin.fileno())
1971
2155
os.dup2(null, sys.stdout.fileno())
1972
2156
os.dup2(null, sys.stderr.fileno())
1982
2166
parser = argparse.ArgumentParser()
1983
2167
parser.add_argument("-v", "--version", action="version",
1984
version = "%%(prog)s %s" % version,
2168
version = "%(prog)s {0}".format(version),
1985
2169
help="show version number and exit")
1986
2170
parser.add_argument("-i", "--interface", metavar="IF",
1987
2171
help="Bind to interface IF")
2012
2196
parser.add_argument("--no-restore", action="store_false",
2013
2197
dest="restore", help="Do not restore stored"
2199
parser.add_argument("--socket", type=int,
2200
help="Specify a file descriptor to a network"
2201
" socket to use instead of creating one")
2015
2202
parser.add_argument("--statedir", metavar="DIR",
2016
2203
help="Directory to save/restore state in")
2051
2239
if server_settings["port"]:
2052
2240
server_settings["port"] = server_config.getint("DEFAULT",
2242
if server_settings["socket"]:
2243
server_settings["socket"] = server_config.getint("DEFAULT",
2245
# Later, stdin will, and stdout and stderr might, be dup'ed
2246
# over with an opened os.devnull. But we don't want this to
2247
# happen with a supplied network socket.
2248
if 0 <= server_settings["socket"] <= 2:
2249
server_settings["socket"] = os.dup(server_settings
2054
2251
del server_config
2056
2253
# Override the settings from the config file with command line
2058
2255
for option in ("interface", "address", "port", "debug",
2059
2256
"priority", "servicename", "configdir",
2060
2257
"use_dbus", "use_ipv6", "debuglevel", "restore",
2258
"statedir", "socket"):
2062
2259
value = getattr(options, option)
2063
2260
if value is not None:
2064
2261
server_settings[option] = value
2091
2288
if server_settings["servicename"] != "Mandos":
2092
2289
syslogger.setFormatter(logging.Formatter
2093
('Mandos (%s) [%%(process)d]:'
2094
' %%(levelname)s: %%(message)s'
2095
% server_settings["servicename"]))
2290
('Mandos ({0}) [%(process)d]:'
2291
' %(levelname)s: %(message)s'
2292
.format(server_settings
2097
2295
# Parse config file with clients
2098
client_config = configparser.SafeConfigParser(Client.client_defaults)
2296
client_config = configparser.SafeConfigParser(Client
2099
2298
client_config.read(os.path.join(server_settings["configdir"],
2100
2299
"clients.conf"))
2110
2309
use_ipv6=use_ipv6,
2111
2310
gnutls_priority=
2112
2311
server_settings["priority"],
2313
socketfd=(server_settings["socket"]
2115
2316
pidfilename = "/var/run/mandos.pid"
2117
2318
pidfile = open(pidfilename, "w")
2119
logger.error("Could not open file %r", pidfilename)
2319
except IOError as e:
2320
logger.error("Could not open file %r", pidfilename,
2122
uid = pwd.getpwnam("_mandos").pw_uid
2123
gid = pwd.getpwnam("_mandos").pw_gid
2323
for name in ("_mandos", "mandos", "nobody"):
2126
uid = pwd.getpwnam("mandos").pw_uid
2127
gid = pwd.getpwnam("mandos").pw_gid
2325
uid = pwd.getpwnam(name).pw_uid
2326
gid = pwd.getpwnam(name).pw_gid
2128
2328
except KeyError:
2130
uid = pwd.getpwnam("nobody").pw_uid
2131
gid = pwd.getpwnam("nobody").pw_gid
2138
2336
except OSError as error:
2139
if error[0] != errno.EPERM:
2337
if error.errno != errno.EPERM:
2164
2362
# Close all input and output, do double fork, etc.
2365
# multiprocessing will use threads, so before we use gobject we
2366
# need to inform gobject that threads will be used.
2167
2367
gobject.threads_init()
2169
2369
global main_loop
2170
2370
# From the Avahi example code
2171
DBusGMainLoop(set_as_default=True )
2371
DBusGMainLoop(set_as_default=True)
2172
2372
main_loop = gobject.MainLoop()
2173
2373
bus = dbus.SystemBus()
2174
2374
# End of Avahi example code
2213
2412
(stored_state))
2214
2413
os.remove(stored_state_path)
2215
2414
except IOError as e:
2216
logger.warning("Could not load persistent state: {0}"
2218
if e.errno != errno.ENOENT:
2415
if e.errno == errno.ENOENT:
2416
logger.warning("Could not load persistent state: {0}"
2417
.format(os.strerror(e.errno)))
2419
logger.critical("Could not load persistent state:",
2220
2422
except EOFError as e:
2221
2423
logger.warning("Could not load persistent state: "
2222
"EOFError: {0}".format(e))
2424
"EOFError:", exc_info=e)
2224
2426
with PGPEngine() as pgp:
2225
2427
for client_name, client in clients_data.iteritems():
2243
2445
# Clients who has passed its expire date can still be
2244
2446
# enabled if its last checker was successful. Clients
2245
# whose checker failed before we stored its state is
2246
# assumed to have failed all checkers during downtime.
2447
# whose checker succeeded before we stored its state is
2448
# assumed to have successfully run all checkers during
2247
2450
if client["enabled"]:
2248
2451
if datetime.datetime.utcnow() >= client["expires"]:
2249
2452
if not client["last_checked_ok"]:
2250
2453
logger.warning(
2251
2454
"disabling client {0} - Client never "
2252
"performed a successfull checker"
2253
.format(client["name"]))
2455
"performed a successful checker"
2456
.format(client_name))
2254
2457
client["enabled"] = False
2255
2458
elif client["last_checker_status"] != 0:
2256
2459
logger.warning(
2257
2460
"disabling client {0} - Client "
2258
2461
"last checker failed with error code {1}"
2259
.format(client["name"],
2462
.format(client_name,
2260
2463
client["last_checker_status"]))
2261
2464
client["enabled"] = False
2263
2466
client["expires"] = (datetime.datetime
2265
2468
+ client["timeout"])
2469
logger.debug("Last checker succeeded,"
2470
" keeping {0} enabled"
2471
.format(client_name))
2268
2473
client["secret"] = (
2269
2474
pgp.decrypt(client["encrypted_secret"],
2275
2480
.format(client_name))
2276
2481
client["secret"] = (
2277
2482
client_settings[client_name]["secret"])
2280
2484
# Add/remove clients based on new changes made to config
2281
for client_name in set(old_client_settings) - set(client_settings):
2485
for client_name in (set(old_client_settings)
2486
- set(client_settings)):
2282
2487
del clients_data[client_name]
2283
for client_name in set(client_settings) - set(old_client_settings):
2488
for client_name in (set(client_settings)
2489
- set(old_client_settings)):
2284
2490
clients_data[client_name] = client_settings[client_name]
2286
# Create clients all clients
2492
# Create all client objects
2287
2493
for client_name, client in clients_data.iteritems():
2288
2494
tcp_server.clients[client_name] = client_class(
2289
2495
name = client_name, settings = client)
2291
2497
if not tcp_server.clients:
2292
2498
logger.warning("No clients defined")
2304
2510
# "pidfile" was never created
2306
2512
del pidfilename
2307
signal.signal(signal.SIGINT, signal.SIG_IGN)
2309
2514
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2310
2515
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2313
class MandosDBusService(dbus.service.Object):
2518
@alternate_dbus_interfaces({"se.recompile.Mandos":
2519
"se.bsnet.fukt.Mandos"})
2520
class MandosDBusService(DBusObjectWithProperties):
2314
2521
"""A D-Bus proxy object"""
2315
2522
def __init__(self):
2316
2523
dbus.service.Object.__init__(self, bus, "/")
2317
2524
_interface = "se.recompile.Mandos"
2526
@dbus_interface_annotations(_interface)
2528
return { "org.freedesktop.DBus.Property"
2529
".EmitsChangedSignal":
2319
2532
@dbus.service.signal(_interface, signature="o")
2320
2533
def ClientAdded(self, objpath):
2404
2615
del client_settings[client.name]["secret"]
2407
tempfd, tempname = tempfile.mkstemp(suffix=".pickle",
2410
(stored_state_path))
2411
with os.fdopen(tempfd, "wb") as stored_state:
2618
with (tempfile.NamedTemporaryFile
2619
(mode='wb', suffix=".pickle", prefix='clients-',
2620
dir=os.path.dirname(stored_state_path),
2621
delete=False)) as stored_state:
2412
2622
pickle.dump((clients, client_settings), stored_state)
2623
tempname=stored_state.name
2413
2624
os.rename(tempname, stored_state_path)
2414
2625
except (IOError, OSError) as e:
2415
logger.warning("Could not save persistent state: {0}"
2419
2628
os.remove(tempname)
2420
2629
except NameError:
2422
if e.errno not in set((errno.ENOENT, errno.EACCES,
2631
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
2632
logger.warning("Could not save persistent state: {0}"
2633
.format(os.strerror(e.errno)))
2635
logger.warning("Could not save persistent state:",
2426
2639
# Delete all clients, and settings from config
2454
2667
service.port = tcp_server.socket.getsockname()[1]
2456
2669
logger.info("Now listening on address %r, port %d,"
2457
" flowinfo %d, scope_id %d"
2458
% tcp_server.socket.getsockname())
2670
" flowinfo %d, scope_id %d",
2671
*tcp_server.socket.getsockname())
2460
logger.info("Now listening on address %r, port %d"
2461
% tcp_server.socket.getsockname())
2673
logger.info("Now listening on address %r, port %d",
2674
*tcp_server.socket.getsockname())
2463
2676
#service.interface = tcp_server.socket.getsockname()[3]