171
172
def password_encode(self, password):
172
173
# Passphrase can not be empty and can not contain newlines or
173
174
# NUL bytes. So we prefix it and hex encode it.
174
return b"mandos" + binascii.hexlify(password)
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"))
176
183
def encrypt(self, data, password):
177
self.gnupg.passphrase = self.password_encode(password)
178
with open(os.devnull) as devnull:
180
proc = self.gnupg.run(['--symmetric'],
181
create_fhs=['stdin', 'stdout'],
182
attach_fhs={'stderr': devnull})
183
with contextlib.closing(proc.handles['stdin']) as f:
185
with contextlib.closing(proc.handles['stdout']) as f:
186
ciphertext = f.read()
190
self.gnupg.passphrase = None
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:
191
199
return ciphertext
193
201
def decrypt(self, data, password):
194
self.gnupg.passphrase = self.password_encode(password)
195
with open(os.devnull) as devnull:
197
proc = self.gnupg.run(['--decrypt'],
198
create_fhs=['stdin', 'stdout'],
199
attach_fhs={'stderr': devnull})
200
with contextlib.closing(proc.handles['stdin'] ) as f:
202
with contextlib.closing(proc.handles['stdout']) as f:
203
decrypted_plaintext = f.read()
207
self.gnupg.passphrase = None
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:
208
218
return decrypted_plaintext
212
221
class AvahiError(Exception):
213
222
def __init__(self, value, *args, **kwargs):
214
223
self.value = value
369
386
self.server_state_changed)
370
387
self.server_state_changed(self.server.GetState())
372
390
class AvahiServiceToSyslog(AvahiService):
373
391
def rename(self):
374
392
"""Add the new name to the syslog messages"""
375
393
ret = AvahiService.rename(self)
376
394
syslogger.setFormatter(logging.Formatter
377
('Mandos (%s) [%%(process)d]:'
378
' %%(levelname)s: %%(message)s'
395
('Mandos ({0}) [%(process)d]:'
396
' %(levelname)s: %(message)s'
382
401
def timedelta_to_milliseconds(td):
383
402
"Convert a datetime.timedelta() to milliseconds"
384
403
return ((td.days * 24 * 60 * 60 * 1000)
385
404
+ (td.seconds * 1000)
386
405
+ (td.microseconds // 1000))
388
408
class Client(object):
389
409
"""A representation of a client host served by this server.
415
435
last_checked_ok: datetime.datetime(); (UTC) or None
416
436
last_checker_status: integer between 0 and 255 reflecting exit
417
437
status of last checker. -1 reflects crashed
438
checker, -2 means no checker completed yet.
419
439
last_enabled: datetime.datetime(); (UTC) or None
420
440
name: string; from the config file, used in log messages and
421
441
D-Bus identifiers
422
442
secret: bytestring; sent verbatim (over TLS) to client
423
443
timeout: datetime.timedelta(); How long from last_checked_ok
424
444
until this client is disabled
425
extended_timeout: extra long timeout when password has been sent
445
extended_timeout: extra long timeout when secret has been sent
426
446
runtime_expansions: Allowed attributes for runtime expansion.
427
447
expires: datetime.datetime(); time (UTC) when a client will be
428
448
disabled, or None
449
server_settings: The server_settings dict from main()
431
452
runtime_expansions = ("approval_delay", "approval_duration",
432
"created", "enabled", "fingerprint",
433
"host", "interval", "last_checked_ok",
453
"created", "enabled", "expires",
454
"fingerprint", "host", "interval",
455
"last_approval_request", "last_checked_ok",
434
456
"last_enabled", "name", "timeout")
435
client_defaults = { "timeout": "5m",
436
"extended_timeout": "15m",
457
client_defaults = { "timeout": "PT5M",
458
"extended_timeout": "PT15M",
438
460
"checker": "fping -q -- %%(host)s",
440
"approval_delay": "0s",
441
"approval_duration": "1s",
462
"approval_delay": "PT0S",
463
"approval_duration": "PT1S",
442
464
"approved_by_default": "True",
443
465
"enabled": "True",
501
523
client["checker_command"] = section["checker"]
502
524
client["last_approval_request"] = None
503
525
client["last_checked_ok"] = None
504
client["last_checker_status"] = None
526
client["last_checker_status"] = -2
509
def __init__(self, settings, name = None):
510
"""Note: the 'checker' key in 'config' sets the
511
'checker_command' attribute and *not* the 'checker'
530
def __init__(self, settings, name = None, server_settings=None):
532
if server_settings is None:
534
self.server_settings = server_settings
514
535
# adding all client settings
515
536
for setting, value in settings.iteritems():
516
537
setattr(self, setting, value)
566
587
if getattr(self, "enabled", False):
567
588
# Already enabled
569
self.send_changedstate()
570
590
self.expires = datetime.datetime.utcnow() + self.timeout
571
591
self.enabled = True
572
592
self.last_enabled = datetime.datetime.utcnow()
573
593
self.init_checker()
594
self.send_changedstate()
575
596
def disable(self, quiet=True):
576
597
"""Disable this client."""
577
598
if not getattr(self, "enabled", False):
580
self.send_changedstate()
582
601
logger.info("Disabling client %s", self.name)
583
if getattr(self, "disable_initiator_tag", False):
602
if getattr(self, "disable_initiator_tag", None) is not None:
584
603
gobject.source_remove(self.disable_initiator_tag)
585
604
self.disable_initiator_tag = None
586
605
self.expires = None
587
if getattr(self, "checker_initiator_tag", False):
606
if getattr(self, "checker_initiator_tag", None) is not None:
588
607
gobject.source_remove(self.checker_initiator_tag)
589
608
self.checker_initiator_tag = None
590
609
self.stop_checker()
591
610
self.enabled = False
612
self.send_changedstate()
592
613
# Do not run this again if called by a gobject.timeout_add
626
651
logger.warning("Checker for %(name)s crashed?",
629
def checked_ok(self, timeout=None):
630
"""Bump up the timeout for this client.
632
This should only be called when the client has been seen,
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."""
635
662
if timeout is None:
636
663
timeout = self.timeout
637
self.last_checked_ok = datetime.datetime.utcnow()
638
664
if self.disable_initiator_tag is not None:
639
665
gobject.source_remove(self.disable_initiator_tag)
666
self.disable_initiator_tag = None
640
667
if getattr(self, "enabled", False):
641
668
self.disable_initiator_tag = (gobject.timeout_add
642
669
(timedelta_to_milliseconds
652
679
If a checker already exists, leave it running and do
654
681
# The reason for not killing a running checker is that if we
655
# did that, then if a checker (for some reason) started
656
# running slowly and taking more than 'interval' time, the
657
# client would inevitably timeout, since no checker would get
658
# a chance to run to completion. If we instead leave running
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
659
686
# checkers alone, the checker would have to take more time
660
687
# than 'timeout' for the client to be disabled, which is as it
675
703
self.current_checker_command)
676
704
# Start a new checker if needed
677
705
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)
679
# In case checker_command has exactly one % operator
680
command = self.checker_command % self.host
682
# Escape attributes for the shell
683
escaped_attrs = dict(
685
re.escape(unicode(str(getattr(self, attr, "")),
689
self.runtime_expansions)
692
command = self.checker_command % escaped_attrs
693
except TypeError as error:
694
logger.error('Could not format string "%s":'
695
' %s', self.checker_command, error)
696
return True # Try again later
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
697
717
self.current_checker_command = command
699
719
logger.info("Starting checker %r for %s",
702
722
# in normal mode, that is already done by daemon(),
703
723
# and in debug mode we don't want to. (Stdin is
704
724
# 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,
705
733
self.checker = subprocess.Popen(command,
708
self.checker_callback_tag = (gobject.child_watch_add
710
self.checker_callback,
712
# The checker may have completed before the gobject
713
# watch was added. Check for this.
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.
714
748
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
716
gobject.source_remove(self.checker_callback_tag)
717
self.checker_callback(pid, status, command)
718
749
except OSError as error:
719
logger.error("Failed to start subprocess: %s",
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)
721
759
# 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
773
848
class DBusPropertyException(dbus.exceptions.DBusException):
774
849
"""A base class for D-Bus property-related exceptions
801
def _is_dbus_property(obj):
802
return getattr(obj, "_dbus_is_property", False)
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),
804
def _get_all_dbus_properties(self):
885
def _get_all_dbus_things(self, thing):
805
886
"""Returns a generator of (name, attribute) pairs
807
return ((prop.__get__(self)._dbus_name, prop.__get__(self))
888
return ((getattr(athing.__get__(self), "_dbus_name",
890
athing.__get__(self))
808
891
for cls in self.__class__.__mro__
810
inspect.getmembers(cls, self._is_dbus_property))
893
inspect.getmembers(cls,
894
self._is_dbus_thing(thing)))
812
896
def _get_dbus_property(self, interface_name, property_name):
813
897
"""Returns a bound method if one exists which is a D-Bus
897
986
e.setAttribute("access", prop._dbus_access)
899
988
for if_tag in document.getElementsByTagName("interface"):
900
990
for tag in (make_tag(document, name, prop)
902
in self._get_all_dbus_properties()
992
in self._get_all_dbus_things("property")
903
993
if prop._dbus_interface
904
994
== if_tag.getAttribute("name")):
905
995
if_tag.appendChild(tag)
996
# Add annotation tags
997
for typ in ("method", "signal", "property"):
998
for tag in if_tag.getElementsByTagName(typ):
1000
for name, prop in (self.
1001
_get_all_dbus_things(typ)):
1002
if (name == tag.getAttribute("name")
1003
and prop._dbus_interface
1004
== if_tag.getAttribute("name")):
1005
annots.update(getattr
1007
"_dbus_annotations",
1009
for name, value in annots.iteritems():
1010
ann_tag = document.createElement(
1012
ann_tag.setAttribute("name", name)
1013
ann_tag.setAttribute("value", value)
1014
tag.appendChild(ann_tag)
1015
# Add interface annotation tags
1016
for annotation, value in dict(
1017
itertools.chain.from_iterable(
1018
annotations().iteritems()
1019
for name, annotations in
1020
self._get_all_dbus_things("interface")
1021
if name == if_tag.getAttribute("name")
1023
ann_tag = document.createElement("annotation")
1024
ann_tag.setAttribute("name", annotation)
1025
ann_tag.setAttribute("value", value)
1026
if_tag.appendChild(ann_tag)
906
1027
# Add the names to the return values for the
907
1028
# "org.freedesktop.DBus.Properties" methods
908
1029
if (if_tag.getAttribute("name")
935
1056
variant_level=variant_level)
938
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
940
"""Applied to an empty subclass of a D-Bus object, this metaclass
941
will add additional D-Bus attributes matching a certain pattern.
1059
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1060
"""A class decorator; applied to a subclass of
1061
dbus.service.Object, it will add alternate D-Bus attributes with
1062
interface names according to the "alt_interface_names" mapping.
1065
@alternate_dbus_interfaces({"org.example.Interface":
1066
"net.example.AlternateInterface"})
1067
class SampleDBusObject(dbus.service.Object):
1068
@dbus.service.method("org.example.Interface")
1069
def SampleDBusMethod():
1072
The above "SampleDBusMethod" on "SampleDBusObject" will be
1073
reachable via two interfaces: "org.example.Interface" and
1074
"net.example.AlternateInterface", the latter of which will have
1075
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1076
"true", unless "deprecate" is passed with a False value.
1078
This works for methods and signals, and also for D-Bus properties
1079
(from DBusObjectWithProperties) and interfaces (from the
1080
dbus_interface_annotations decorator).
943
def __new__(mcs, name, bases, attr):
944
# Go through all the base classes which could have D-Bus
945
# methods, signals, or properties in them
946
for base in (b for b in bases
947
if issubclass(b, dbus.service.Object)):
948
# Go though all attributes of the base class
949
for attrname, attribute in inspect.getmembers(base):
1083
for orig_interface_name, alt_interface_name in (
1084
alt_interface_names.iteritems()):
1086
interface_names = set()
1087
# Go though all attributes of the class
1088
for attrname, attribute in inspect.getmembers(cls):
950
1089
# Ignore non-D-Bus attributes, and D-Bus attributes
951
1090
# with the wrong interface name
952
1091
if (not hasattr(attribute, "_dbus_interface")
953
1092
or not attribute._dbus_interface
954
.startswith("se.recompile.Mandos")):
1093
.startswith(orig_interface_name)):
956
1095
# Create an alternate D-Bus interface name based on
957
1096
# the current name
958
1097
alt_interface = (attribute._dbus_interface
959
.replace("se.recompile.Mandos",
960
"se.bsnet.fukt.Mandos"))
1098
.replace(orig_interface_name,
1099
alt_interface_name))
1100
interface_names.add(alt_interface)
961
1101
# Is this a D-Bus signal?
962
1102
if getattr(attribute, "_dbus_is_signal", False):
963
# Extract the original non-method function by
1103
# Extract the original non-method undecorated
1104
# function by black magic
965
1105
nonmethod_func = (dict(
966
1106
zip(attribute.func_code.co_freevars,
967
1107
attribute.__closure__))["func"]
978
1118
nonmethod_func.func_name,
979
1119
nonmethod_func.func_defaults,
980
1120
nonmethod_func.func_closure)))
1121
# Copy annotations, if any
1123
new_function._dbus_annotations = (
1124
dict(attribute._dbus_annotations))
1125
except AttributeError:
981
1127
# Define a creator of a function to call both the
982
# old and new functions, so both the old and new
983
# signals gets sent when the function is called
1128
# original and alternate functions, so both the
1129
# original and alternate signals gets sent when
1130
# the function is called
984
1131
def fixscope(func1, func2):
985
1132
"""This function is a scope container to pass
986
1133
func1 and func2 to the "call_both" function
1030
1182
attribute.func_name,
1031
1183
attribute.func_defaults,
1032
1184
attribute.func_closure)))
1033
return type.__new__(mcs, name, bases, attr)
1185
# Copy annotations, if any
1187
attr[attrname]._dbus_annotations = (
1188
dict(attribute._dbus_annotations))
1189
except AttributeError:
1191
# Is this a D-Bus interface?
1192
elif getattr(attribute, "_dbus_is_interface", False):
1193
# Create a new, but exactly alike, function
1194
# object. Decorate it to be a new D-Bus interface
1195
# with the alternate D-Bus interface name. Add it
1197
attr[attrname] = (dbus_interface_annotations
1200
(attribute.func_code,
1201
attribute.func_globals,
1202
attribute.func_name,
1203
attribute.func_defaults,
1204
attribute.func_closure)))
1206
# Deprecate all alternate interfaces
1207
iname="_AlternateDBusNames_interface_annotation{0}"
1208
for interface_name in interface_names:
1209
@dbus_interface_annotations(interface_name)
1211
return { "org.freedesktop.DBus.Deprecated":
1213
# Find an unused name
1214
for aname in (iname.format(i)
1215
for i in itertools.count()):
1216
if aname not in attr:
1220
# Replace the class with a new subclass of it with
1221
# methods, signals, etc. as created above.
1222
cls = type(b"{0}Alternate".format(cls.__name__),
1228
@alternate_dbus_interfaces({"se.recompile.Mandos":
1229
"se.bsnet.fukt.Mandos"})
1036
1230
class ClientDBus(Client, DBusObjectWithProperties):
1037
1231
"""A Client class using D-Bus
1366
1562
def Timeout_dbus_property(self, value=None):
1367
1563
if value is None: # get
1368
1564
return dbus.UInt64(self.timeout_milliseconds())
1565
old_timeout = self.timeout
1369
1566
self.timeout = datetime.timedelta(0, 0, 0, value)
1370
# Reschedule timeout
1567
# Reschedule disabling
1371
1568
if self.enabled:
1372
1569
now = datetime.datetime.utcnow()
1373
time_to_die = timedelta_to_milliseconds(
1374
(self.last_checked_ok + self.timeout) - now)
1375
if time_to_die <= 0:
1570
self.expires += self.timeout - old_timeout
1571
if self.expires <= now:
1376
1572
# The timeout has passed
1379
self.expires = (now +
1380
datetime.timedelta(milliseconds =
1382
1575
if (getattr(self, "disable_initiator_tag", None)
1385
1578
gobject.source_remove(self.disable_initiator_tag)
1386
self.disable_initiator_tag = (gobject.timeout_add
1579
self.disable_initiator_tag = (
1580
gobject.timeout_add(
1581
timedelta_to_milliseconds(self.expires - now),
1390
1584
# ExtendedTimeout - property
1391
1585
@dbus_service_property(_interface, signature="t",
1744
1931
use_ipv6: Boolean; to use IPv6 or not
1746
1933
def __init__(self, server_address, RequestHandlerClass,
1747
interface=None, use_ipv6=True):
1934
interface=None, use_ipv6=True, socketfd=None):
1935
"""If socketfd is set, use that file descriptor instead of
1936
creating a new one with socket.socket().
1748
1938
self.interface = interface
1750
1940
self.address_family = socket.AF_INET6
1941
if socketfd is not None:
1942
# Save the file descriptor
1943
self.socketfd = socketfd
1944
# Save the original socket.socket() function
1945
self.socket_socket = socket.socket
1946
# To implement --socket, we monkey patch socket.socket.
1948
# (When socketserver.TCPServer is a new-style class, we
1949
# could make self.socket into a property instead of monkey
1950
# patching socket.socket.)
1952
# Create a one-time-only replacement for socket.socket()
1953
@functools.wraps(socket.socket)
1954
def socket_wrapper(*args, **kwargs):
1955
# Restore original function so subsequent calls are
1957
socket.socket = self.socket_socket
1958
del self.socket_socket
1959
# This time only, return a new socket object from the
1960
# saved file descriptor.
1961
return socket.fromfd(self.socketfd, *args, **kwargs)
1962
# Replace socket.socket() function with wrapper
1963
socket.socket = socket_wrapper
1964
# The socketserver.TCPServer.__init__ will call
1965
# socket.socket(), which might be our replacement,
1966
# socket_wrapper(), if socketfd was set.
1751
1967
socketserver.TCPServer.__init__(self, server_address,
1752
1968
RequestHandlerClass)
1753
1970
def server_bind(self):
1754
1971
"""This overrides the normal server_bind() function
1755
1972
to bind to an interface if one was specified, and also NOT to
1764
1981
self.socket.setsockopt(socket.SOL_SOCKET,
1765
1982
SO_BINDTODEVICE,
1983
str(self.interface + '\0'))
1768
1984
except socket.error as error:
1769
if error[0] == errno.EPERM:
1770
logger.error("No permission to"
1771
" bind to interface %s",
1773
elif error[0] == errno.ENOPROTOOPT:
1985
if error.errno == errno.EPERM:
1986
logger.error("No permission to bind to"
1987
" interface %s", self.interface)
1988
elif error.errno == errno.ENOPROTOOPT:
1774
1989
logger.error("SO_BINDTODEVICE not available;"
1775
1990
" cannot bind to interface %s",
1776
1991
self.interface)
1992
elif error.errno == errno.ENODEV:
1993
logger.error("Interface %s does not exist,"
1994
" cannot bind", self.interface)
1779
1997
# Only bind(2) the socket if we really need to.
1839
2058
def handle_ipc(self, source, condition, parent_pipe=None,
1840
2059
proc = None, client_object=None):
1842
gobject.IO_IN: "IN", # There is data to read.
1843
gobject.IO_OUT: "OUT", # Data can be written (without
1845
gobject.IO_PRI: "PRI", # There is urgent data to read.
1846
gobject.IO_ERR: "ERR", # Error condition.
1847
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1848
# broken, usually for pipes and
1851
conditions_string = ' | '.join(name
1853
condition_names.iteritems()
1854
if cond & condition)
1855
2060
# error, or the other end of multiprocessing.Pipe has closed
1856
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
2061
if condition & (gobject.IO_ERR | gobject.IO_HUP):
1857
2062
# Wait for other process to exit
2125
def rfc3339_duration_to_delta(duration):
2126
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2128
>>> rfc3339_duration_to_delta("P7D")
2129
datetime.timedelta(7)
2130
>>> rfc3339_duration_to_delta("PT60S")
2131
datetime.timedelta(0, 60)
2132
>>> rfc3339_duration_to_delta("PT60M")
2133
datetime.timedelta(0, 3600)
2134
>>> rfc3339_duration_to_delta("PT24H")
2135
datetime.timedelta(1)
2136
>>> rfc3339_duration_to_delta("P1W")
2137
datetime.timedelta(7)
2138
>>> rfc3339_duration_to_delta("PT5M30S")
2139
datetime.timedelta(0, 330)
2140
>>> rfc3339_duration_to_delta("P1DT3M20S")
2141
datetime.timedelta(1, 200)
2144
# Parsing an RFC 3339 duration with regular expressions is not
2145
# possible - there would have to be multiple places for the same
2146
# values, like seconds. The current code, while more esoteric, is
2147
# cleaner without depending on a parsing library. If Python had a
2148
# built-in library for parsing we would use it, but we'd like to
2149
# avoid excessive use of external libraries.
2151
# New type for defining tokens, syntax, and semantics all-in-one
2152
Token = collections.namedtuple("Token",
2153
("regexp", # To match token; if
2154
# "value" is not None,
2155
# must have a "group"
2157
"value", # datetime.timedelta or
2159
"followers")) # Tokens valid after
2161
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2162
# the "duration" ABNF definition in RFC 3339, Appendix A.
2163
token_end = Token(re.compile(r"$"), None, frozenset())
2164
token_second = Token(re.compile(r"(\d+)S"),
2165
datetime.timedelta(seconds=1),
2166
frozenset((token_end,)))
2167
token_minute = Token(re.compile(r"(\d+)M"),
2168
datetime.timedelta(minutes=1),
2169
frozenset((token_second, token_end)))
2170
token_hour = Token(re.compile(r"(\d+)H"),
2171
datetime.timedelta(hours=1),
2172
frozenset((token_minute, token_end)))
2173
token_time = Token(re.compile(r"T"),
2175
frozenset((token_hour, token_minute,
2177
token_day = Token(re.compile(r"(\d+)D"),
2178
datetime.timedelta(days=1),
2179
frozenset((token_time, token_end)))
2180
token_month = Token(re.compile(r"(\d+)M"),
2181
datetime.timedelta(weeks=4),
2182
frozenset((token_day, token_end)))
2183
token_year = Token(re.compile(r"(\d+)Y"),
2184
datetime.timedelta(weeks=52),
2185
frozenset((token_month, token_end)))
2186
token_week = Token(re.compile(r"(\d+)W"),
2187
datetime.timedelta(weeks=1),
2188
frozenset((token_end,)))
2189
token_duration = Token(re.compile(r"P"), None,
2190
frozenset((token_year, token_month,
2191
token_day, token_time,
2193
# Define starting values
2194
value = datetime.timedelta() # Value so far
2196
followers = frozenset(token_duration,) # Following valid tokens
2197
s = duration # String left to parse
2198
# Loop until end token is found
2199
while found_token is not token_end:
2200
# Search for any currently valid tokens
2201
for token in followers:
2202
match = token.regexp.match(s)
2203
if match is not None:
2205
if token.value is not None:
2206
# Value found, parse digits
2207
factor = int(match.group(1), 10)
2208
# Add to value so far
2209
value += factor * token.value
2210
# Strip token from string
2211
s = token.regexp.sub("", s, 1)
2214
# Set valid next tokens
2215
followers = found_token.followers
2218
# No currently valid tokens were found
2219
raise ValueError("Invalid RFC 3339 duration")
1920
2224
def string_to_delta(interval):
1921
2225
"""Parse a string and return a datetime.timedelta
2014
2325
parser.add_argument("--no-dbus", action="store_false",
2015
2326
dest="use_dbus", help="Do not provide D-Bus"
2016
" system bus interface")
2327
" system bus interface", default=None)
2017
2328
parser.add_argument("--no-ipv6", action="store_false",
2018
dest="use_ipv6", help="Do not use IPv6")
2329
dest="use_ipv6", help="Do not use IPv6",
2019
2331
parser.add_argument("--no-restore", action="store_false",
2020
2332
dest="restore", help="Do not restore stored"
2333
" state", default=None)
2334
parser.add_argument("--socket", type=int,
2335
help="Specify a file descriptor to a network"
2336
" socket to use instead of creating one")
2022
2337
parser.add_argument("--statedir", metavar="DIR",
2023
2338
help="Directory to save/restore state in")
2339
parser.add_argument("--foreground", action="store_true",
2340
help="Run in foreground", default=None)
2025
2342
options = parser.parse_args()
2052
2371
# Convert the SafeConfigParser object to a dict
2053
2372
server_settings = server_config.defaults()
2054
2373
# Use the appropriate methods on the non-string config options
2055
for option in ("debug", "use_dbus", "use_ipv6"):
2374
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
2056
2375
server_settings[option] = server_config.getboolean("DEFAULT",
2058
2377
if server_settings["port"]:
2059
2378
server_settings["port"] = server_config.getint("DEFAULT",
2380
if server_settings["socket"]:
2381
server_settings["socket"] = server_config.getint("DEFAULT",
2383
# Later, stdin will, and stdout and stderr might, be dup'ed
2384
# over with an opened os.devnull. But we don't want this to
2385
# happen with a supplied network socket.
2386
if 0 <= server_settings["socket"] <= 2:
2387
server_settings["socket"] = os.dup(server_settings
2061
2389
del server_config
2063
2391
# Override the settings from the config file with command line
2118
2455
use_ipv6=use_ipv6,
2119
2456
gnutls_priority=
2120
2457
server_settings["priority"],
2123
pidfilename = "/var/run/mandos.pid"
2459
socketfd=(server_settings["socket"]
2462
pidfilename = "/run/mandos.pid"
2463
if not os.path.isdir("/run/."):
2464
pidfilename = "/var/run/mandos.pid"
2125
2467
pidfile = open(pidfilename, "w")
2127
logger.error("Could not open file %r", pidfilename)
2468
except IOError as e:
2469
logger.error("Could not open file %r", pidfilename,
2130
uid = pwd.getpwnam("_mandos").pw_uid
2131
gid = pwd.getpwnam("_mandos").pw_gid
2472
for name in ("_mandos", "mandos", "nobody"):
2134
uid = pwd.getpwnam("mandos").pw_uid
2135
gid = pwd.getpwnam("mandos").pw_gid
2474
uid = pwd.getpwnam(name).pw_uid
2475
gid = pwd.getpwnam(name).pw_gid
2136
2477
except KeyError:
2138
uid = pwd.getpwnam("nobody").pw_uid
2139
gid = pwd.getpwnam("nobody").pw_gid
2146
2485
except OSError as error:
2147
if error[0] != errno.EPERM:
2486
if error.errno != errno.EPERM:
2151
2490
# Enable all possible GnuTLS debugging
2162
2501
.gnutls_global_set_log_function(debug_gnutls))
2164
2503
# Redirect stdin so all checkers get /dev/null
2165
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2504
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2166
2505
os.dup2(null, sys.stdin.fileno())
2170
2509
# Need to fork before connecting to D-Bus
2172
2511
# Close all input and output, do double fork, etc.
2514
# multiprocessing will use threads, so before we use gobject we
2515
# need to inform gobject that threads will be used.
2175
2516
gobject.threads_init()
2177
2518
global main_loop
2178
2519
# From the Avahi example code
2179
DBusGMainLoop(set_as_default=True )
2520
DBusGMainLoop(set_as_default=True)
2180
2521
main_loop = gobject.MainLoop()
2181
2522
bus = dbus.SystemBus()
2182
2523
# End of Avahi example code
2221
2569
(stored_state))
2222
2570
os.remove(stored_state_path)
2223
2571
except IOError as e:
2224
logger.warning("Could not load persistent state: {0}"
2226
if e.errno != errno.ENOENT:
2572
if e.errno == errno.ENOENT:
2573
logger.warning("Could not load persistent state: {0}"
2574
.format(os.strerror(e.errno)))
2576
logger.critical("Could not load persistent state:",
2228
2579
except EOFError as e:
2229
2580
logger.warning("Could not load persistent state: "
2230
"EOFError: {0}".format(e))
2581
"EOFError:", exc_info=e)
2232
2583
with PGPEngine() as pgp:
2233
2584
for client_name, client in clients_data.iteritems():
2585
# Skip removed clients
2586
if client_name not in client_settings:
2234
2589
# Decide which value to use after restoring saved state.
2235
2590
# We have three different values: Old config file,
2236
2591
# new config file, and saved state.
2251
2606
# Clients who has passed its expire date can still be
2252
2607
# enabled if its last checker was successful. Clients
2253
# whose checker failed before we stored its state is
2254
# assumed to have failed all checkers during downtime.
2608
# whose checker succeeded before we stored its state is
2609
# assumed to have successfully run all checkers during
2255
2611
if client["enabled"]:
2256
2612
if datetime.datetime.utcnow() >= client["expires"]:
2257
2613
if not client["last_checked_ok"]:
2258
2614
logger.warning(
2259
2615
"disabling client {0} - Client never "
2260
"performed a successfull checker"
2261
.format(client["name"]))
2616
"performed a successful checker"
2617
.format(client_name))
2262
2618
client["enabled"] = False
2263
2619
elif client["last_checker_status"] != 0:
2264
2620
logger.warning(
2265
2621
"disabling client {0} - Client "
2266
2622
"last checker failed with error code {1}"
2267
.format(client["name"],
2623
.format(client_name,
2268
2624
client["last_checker_status"]))
2269
2625
client["enabled"] = False
2294
2649
for client_name in (set(client_settings)
2295
2650
- set(old_client_settings)):
2296
2651
clients_data[client_name] = client_settings[client_name]
2298
# Create clients all clients
2653
# Create all client objects
2299
2654
for client_name, client in clients_data.iteritems():
2300
2655
tcp_server.clients[client_name] = client_class(
2301
name = client_name, settings = client)
2656
name = client_name, settings = client,
2657
server_settings = server_settings)
2303
2659
if not tcp_server.clients:
2304
2660
logger.warning("No clients defined")
2310
pidfile.write(str(pid) + "\n".encode("utf-8"))
2313
logger.error("Could not write to file %r with PID %d",
2316
# "pidfile" was never created
2663
if pidfile is not None:
2667
pidfile.write(str(pid) + "\n".encode("utf-8"))
2669
logger.error("Could not write to file %r with PID %d",
2318
2672
del pidfilename
2319
signal.signal(signal.SIGINT, signal.SIG_IGN)
2321
2674
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2322
2675
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2325
class MandosDBusService(dbus.service.Object):
2678
@alternate_dbus_interfaces({"se.recompile.Mandos":
2679
"se.bsnet.fukt.Mandos"})
2680
class MandosDBusService(DBusObjectWithProperties):
2326
2681
"""A D-Bus proxy object"""
2327
2682
def __init__(self):
2328
2683
dbus.service.Object.__init__(self, bus, "/")
2329
2684
_interface = "se.recompile.Mandos"
2686
@dbus_interface_annotations(_interface)
2688
return { "org.freedesktop.DBus.Property"
2689
".EmitsChangedSignal":
2331
2692
@dbus.service.signal(_interface, signature="o")
2332
2693
def ClientAdded(self, objpath):
2416
2776
del client_settings[client.name]["secret"]
2419
tempfd, tempname = tempfile.mkstemp(suffix=".pickle",
2422
(stored_state_path))
2423
with os.fdopen(tempfd, "wb") as stored_state:
2779
with (tempfile.NamedTemporaryFile
2780
(mode='wb', suffix=".pickle", prefix='clients-',
2781
dir=os.path.dirname(stored_state_path),
2782
delete=False)) as stored_state:
2424
2783
pickle.dump((clients, client_settings), stored_state)
2784
tempname=stored_state.name
2425
2785
os.rename(tempname, stored_state_path)
2426
2786
except (IOError, OSError) as e:
2427
logger.warning("Could not save persistent state: {0}"
2431
2789
os.remove(tempname)
2432
2790
except NameError:
2434
if e.errno not in set((errno.ENOENT, errno.EACCES,
2792
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
2793
logger.warning("Could not save persistent state: {0}"
2794
.format(os.strerror(e.errno)))
2796
logger.warning("Could not save persistent state:",
2438
2800
# Delete all clients, and settings from config
2439
2801
while tcp_server.clients:
2466
2828
service.port = tcp_server.socket.getsockname()[1]
2468
2830
logger.info("Now listening on address %r, port %d,"
2469
" flowinfo %d, scope_id %d"
2470
% tcp_server.socket.getsockname())
2831
" flowinfo %d, scope_id %d",
2832
*tcp_server.socket.getsockname())
2472
logger.info("Now listening on address %r, port %d"
2473
% tcp_server.socket.getsockname())
2834
logger.info("Now listening on address %r, port %d",
2835
*tcp_server.socket.getsockname())
2475
2837
#service.interface = tcp_server.socket.getsockname()[3]