171
175
def password_encode(self, password):
172
176
# Passphrase can not be empty and can not contain newlines or
173
177
# NUL bytes. So we prefix it and hex encode it.
174
return b"mandos" + binascii.hexlify(password)
178
encoded = b"mandos" + binascii.hexlify(password)
179
if len(encoded) > 2048:
180
# GnuPG can't handle long passwords, so encode differently
181
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
182
.replace(b"\n", b"\\n")
183
.replace(b"\0", b"\\x00"))
176
186
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
187
passphrase = self.password_encode(password)
188
with tempfile.NamedTemporaryFile(dir=self.tempdir
190
passfile.write(passphrase)
192
proc = subprocess.Popen(['gpg', '--symmetric',
196
stdin = subprocess.PIPE,
197
stdout = subprocess.PIPE,
198
stderr = subprocess.PIPE)
199
ciphertext, err = proc.communicate(input = data)
200
if proc.returncode != 0:
191
202
return ciphertext
193
204
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
205
passphrase = self.password_encode(password)
206
with tempfile.NamedTemporaryFile(dir = self.tempdir
208
passfile.write(passphrase)
210
proc = subprocess.Popen(['gpg', '--decrypt',
214
stdin = subprocess.PIPE,
215
stdout = subprocess.PIPE,
216
stderr = subprocess.PIPE)
217
decrypted_plaintext, err = proc.communicate(input
219
if proc.returncode != 0:
208
221
return decrypted_plaintext
212
224
class AvahiError(Exception):
213
225
def __init__(self, value, *args, **kwargs):
214
226
self.value = value
369
389
self.server_state_changed)
370
390
self.server_state_changed(self.server.GetState())
372
393
class AvahiServiceToSyslog(AvahiService):
373
394
def rename(self):
374
395
"""Add the new name to the syslog messages"""
375
396
ret = AvahiService.rename(self)
376
397
syslogger.setFormatter(logging.Formatter
377
('Mandos (%s) [%%(process)d]:'
378
' %%(levelname)s: %%(message)s'
398
('Mandos ({0}) [%(process)d]:'
399
' %(levelname)s: %(message)s'
382
404
def timedelta_to_milliseconds(td):
383
405
"Convert a datetime.timedelta() to milliseconds"
384
406
return ((td.days * 24 * 60 * 60 * 1000)
385
407
+ (td.seconds * 1000)
386
408
+ (td.microseconds // 1000))
388
411
class Client(object):
389
412
"""A representation of a client host served by this server.
426
449
runtime_expansions: Allowed attributes for runtime expansion.
427
450
expires: datetime.datetime(); time (UTC) when a client will be
428
451
disabled, or None
452
server_settings: The server_settings dict from main()
431
455
runtime_expansions = ("approval_delay", "approval_duration",
432
"created", "enabled", "fingerprint",
433
"host", "interval", "last_checked_ok",
456
"created", "enabled", "expires",
457
"fingerprint", "host", "interval",
458
"last_approval_request", "last_checked_ok",
434
459
"last_enabled", "name", "timeout")
435
client_defaults = { "timeout": "5m",
436
"extended_timeout": "15m",
460
client_defaults = { "timeout": "PT5M",
461
"extended_timeout": "PT15M",
438
463
"checker": "fping -q -- %%(host)s",
440
"approval_delay": "0s",
441
"approval_duration": "1s",
465
"approval_delay": "PT0S",
466
"approval_duration": "PT1S",
442
467
"approved_by_default": "True",
443
468
"enabled": "True",
501
526
client["checker_command"] = section["checker"]
502
527
client["last_approval_request"] = None
503
528
client["last_checked_ok"] = None
504
client["last_checker_status"] = None
529
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'
533
def __init__(self, settings, name = None, server_settings=None):
535
if server_settings is None:
537
self.server_settings = server_settings
514
538
# adding all client settings
515
539
for setting, value in settings.iteritems():
516
540
setattr(self, setting, value)
566
590
if getattr(self, "enabled", False):
567
591
# Already enabled
569
self.send_changedstate()
570
593
self.expires = datetime.datetime.utcnow() + self.timeout
571
594
self.enabled = True
572
595
self.last_enabled = datetime.datetime.utcnow()
573
596
self.init_checker()
597
self.send_changedstate()
575
599
def disable(self, quiet=True):
576
600
"""Disable this client."""
577
601
if not getattr(self, "enabled", False):
580
self.send_changedstate()
582
604
logger.info("Disabling client %s", self.name)
583
if getattr(self, "disable_initiator_tag", False):
605
if getattr(self, "disable_initiator_tag", None) is not None:
584
606
gobject.source_remove(self.disable_initiator_tag)
585
607
self.disable_initiator_tag = None
586
608
self.expires = None
587
if getattr(self, "checker_initiator_tag", False):
609
if getattr(self, "checker_initiator_tag", None) is not None:
588
610
gobject.source_remove(self.checker_initiator_tag)
589
611
self.checker_initiator_tag = None
590
612
self.stop_checker()
591
613
self.enabled = False
615
self.send_changedstate()
592
616
# Do not run this again if called by a gobject.timeout_add
626
654
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,
657
def checked_ok(self):
658
"""Assert that the client has been seen, alive and well."""
659
self.last_checked_ok = datetime.datetime.utcnow()
660
self.last_checker_status = 0
663
def bump_timeout(self, timeout=None):
664
"""Bump up the timeout for this client."""
635
665
if timeout is None:
636
666
timeout = self.timeout
637
self.last_checked_ok = datetime.datetime.utcnow()
638
667
if self.disable_initiator_tag is not None:
639
668
gobject.source_remove(self.disable_initiator_tag)
669
self.disable_initiator_tag = None
640
670
if getattr(self, "enabled", False):
641
671
self.disable_initiator_tag = (gobject.timeout_add
642
672
(timedelta_to_milliseconds
652
682
If a checker already exists, leave it running and do
654
684
# 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
685
# did that, and if a checker (for some reason) started running
686
# slowly and taking more than 'interval' time, then the client
687
# would inevitably timeout, since no checker would get a
688
# chance to run to completion. If we instead leave running
659
689
# checkers alone, the checker would have to take more time
660
690
# than 'timeout' for the client to be disabled, which is as it
675
706
self.current_checker_command)
676
707
# Start a new checker if needed
677
708
if self.checker is None:
709
# Escape attributes for the shell
710
escaped_attrs = dict(
711
(attr, re.escape(unicode(getattr(self, attr))))
713
self.runtime_expansions)
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
715
command = self.checker_command % escaped_attrs
716
except TypeError as error:
717
logger.error('Could not format string "%s"',
718
self.checker_command, exc_info=error)
719
return True # Try again later
697
720
self.current_checker_command = command
699
722
logger.info("Starting checker %r for %s",
702
725
# in normal mode, that is already done by daemon(),
703
726
# and in debug mode we don't want to. (Stdin is
704
727
# always replaced by /dev/null.)
728
# The exception is when not debugging but nevertheless
729
# running in the foreground; use the previously
732
if (not self.server_settings["debug"]
733
and self.server_settings["foreground"]):
734
popen_args.update({"stdout": wnull,
705
736
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.
740
except OSError as error:
741
logger.error("Failed to start subprocess",
744
self.checker_callback_tag = (gobject.child_watch_add
746
self.checker_callback,
748
# The checker may have completed before the gobject
749
# watch was added. Check for this.
714
751
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
752
except OSError as error:
719
logger.error("Failed to start subprocess: %s",
753
if error.errno == errno.ECHILD:
754
# This should never happen
755
logger.error("Child process vanished",
760
gobject.source_remove(self.checker_callback_tag)
761
self.checker_callback(pid, status, command)
721
762
# Re-run this periodically if run by gobject.timeout_add
814
def dbus_interface_annotations(dbus_interface):
815
"""Decorator for marking functions returning interface annotations
819
@dbus_interface_annotations("org.example.Interface")
820
def _foo(self): # Function name does not matter
821
return {"org.freedesktop.DBus.Deprecated": "true",
822
"org.freedesktop.DBus.Property.EmitsChangedSignal":
826
func._dbus_is_interface = True
827
func._dbus_interface = dbus_interface
828
func._dbus_name = dbus_interface
833
def dbus_annotations(annotations):
834
"""Decorator to annotate D-Bus methods, signals or properties
837
@dbus_service_property("org.example.Interface", signature="b",
839
@dbus_annotations({{"org.freedesktop.DBus.Deprecated": "true",
840
"org.freedesktop.DBus.Property."
841
"EmitsChangedSignal": "false"})
842
def Property_dbus_property(self):
843
return dbus.Boolean(False)
846
func._dbus_annotations = annotations
773
851
class DBusPropertyException(dbus.exceptions.DBusException):
774
852
"""A base class for D-Bus property-related exceptions
801
def _is_dbus_property(obj):
802
return getattr(obj, "_dbus_is_property", False)
879
def _is_dbus_thing(thing):
880
"""Returns a function testing if an attribute is a D-Bus thing
882
If called like _is_dbus_thing("method") it returns a function
883
suitable for use as predicate to inspect.getmembers().
885
return lambda obj: getattr(obj, "_dbus_is_{0}".format(thing),
804
def _get_all_dbus_properties(self):
888
def _get_all_dbus_things(self, thing):
805
889
"""Returns a generator of (name, attribute) pairs
807
return ((prop.__get__(self)._dbus_name, prop.__get__(self))
891
return ((getattr(athing.__get__(self), "_dbus_name",
893
athing.__get__(self))
808
894
for cls in self.__class__.__mro__
810
inspect.getmembers(cls, self._is_dbus_property))
896
inspect.getmembers(cls,
897
self._is_dbus_thing(thing)))
812
899
def _get_dbus_property(self, interface_name, property_name):
813
900
"""Returns a bound method if one exists which is a D-Bus
897
989
e.setAttribute("access", prop._dbus_access)
899
991
for if_tag in document.getElementsByTagName("interface"):
900
993
for tag in (make_tag(document, name, prop)
902
in self._get_all_dbus_properties()
995
in self._get_all_dbus_things("property")
903
996
if prop._dbus_interface
904
997
== if_tag.getAttribute("name")):
905
998
if_tag.appendChild(tag)
999
# Add annotation tags
1000
for typ in ("method", "signal", "property"):
1001
for tag in if_tag.getElementsByTagName(typ):
1003
for name, prop in (self.
1004
_get_all_dbus_things(typ)):
1005
if (name == tag.getAttribute("name")
1006
and prop._dbus_interface
1007
== if_tag.getAttribute("name")):
1008
annots.update(getattr
1010
"_dbus_annotations",
1012
for name, value in annots.iteritems():
1013
ann_tag = document.createElement(
1015
ann_tag.setAttribute("name", name)
1016
ann_tag.setAttribute("value", value)
1017
tag.appendChild(ann_tag)
1018
# Add interface annotation tags
1019
for annotation, value in dict(
1020
itertools.chain.from_iterable(
1021
annotations().iteritems()
1022
for name, annotations in
1023
self._get_all_dbus_things("interface")
1024
if name == if_tag.getAttribute("name")
1026
ann_tag = document.createElement("annotation")
1027
ann_tag.setAttribute("name", annotation)
1028
ann_tag.setAttribute("value", value)
1029
if_tag.appendChild(ann_tag)
906
1030
# Add the names to the return values for the
907
1031
# "org.freedesktop.DBus.Properties" methods
908
1032
if (if_tag.getAttribute("name")
935
1059
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.
1062
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1063
"""A class decorator; applied to a subclass of
1064
dbus.service.Object, it will add alternate D-Bus attributes with
1065
interface names according to the "alt_interface_names" mapping.
1068
@alternate_dbus_interfaces({"org.example.Interface":
1069
"net.example.AlternateInterface"})
1070
class SampleDBusObject(dbus.service.Object):
1071
@dbus.service.method("org.example.Interface")
1072
def SampleDBusMethod():
1075
The above "SampleDBusMethod" on "SampleDBusObject" will be
1076
reachable via two interfaces: "org.example.Interface" and
1077
"net.example.AlternateInterface", the latter of which will have
1078
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1079
"true", unless "deprecate" is passed with a False value.
1081
This works for methods and signals, and also for D-Bus properties
1082
(from DBusObjectWithProperties) and interfaces (from the
1083
dbus_interface_annotations decorator).
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):
1086
for orig_interface_name, alt_interface_name in (
1087
alt_interface_names.iteritems()):
1089
interface_names = set()
1090
# Go though all attributes of the class
1091
for attrname, attribute in inspect.getmembers(cls):
950
1092
# Ignore non-D-Bus attributes, and D-Bus attributes
951
1093
# with the wrong interface name
952
1094
if (not hasattr(attribute, "_dbus_interface")
953
1095
or not attribute._dbus_interface
954
.startswith("se.recompile.Mandos")):
1096
.startswith(orig_interface_name)):
956
1098
# Create an alternate D-Bus interface name based on
957
1099
# the current name
958
1100
alt_interface = (attribute._dbus_interface
959
.replace("se.recompile.Mandos",
960
"se.bsnet.fukt.Mandos"))
1101
.replace(orig_interface_name,
1102
alt_interface_name))
1103
interface_names.add(alt_interface)
961
1104
# Is this a D-Bus signal?
962
1105
if getattr(attribute, "_dbus_is_signal", False):
963
# Extract the original non-method function by
1106
# Extract the original non-method undecorated
1107
# function by black magic
965
1108
nonmethod_func = (dict(
966
1109
zip(attribute.func_code.co_freevars,
967
1110
attribute.__closure__))["func"]
978
1121
nonmethod_func.func_name,
979
1122
nonmethod_func.func_defaults,
980
1123
nonmethod_func.func_closure)))
1124
# Copy annotations, if any
1126
new_function._dbus_annotations = (
1127
dict(attribute._dbus_annotations))
1128
except AttributeError:
981
1130
# 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
1131
# original and alternate functions, so both the
1132
# original and alternate signals gets sent when
1133
# the function is called
984
1134
def fixscope(func1, func2):
985
1135
"""This function is a scope container to pass
986
1136
func1 and func2 to the "call_both" function
1030
1185
attribute.func_name,
1031
1186
attribute.func_defaults,
1032
1187
attribute.func_closure)))
1033
return type.__new__(mcs, name, bases, attr)
1188
# Copy annotations, if any
1190
attr[attrname]._dbus_annotations = (
1191
dict(attribute._dbus_annotations))
1192
except AttributeError:
1194
# Is this a D-Bus interface?
1195
elif getattr(attribute, "_dbus_is_interface", False):
1196
# Create a new, but exactly alike, function
1197
# object. Decorate it to be a new D-Bus interface
1198
# with the alternate D-Bus interface name. Add it
1200
attr[attrname] = (dbus_interface_annotations
1203
(attribute.func_code,
1204
attribute.func_globals,
1205
attribute.func_name,
1206
attribute.func_defaults,
1207
attribute.func_closure)))
1209
# Deprecate all alternate interfaces
1210
iname="_AlternateDBusNames_interface_annotation{0}"
1211
for interface_name in interface_names:
1212
@dbus_interface_annotations(interface_name)
1214
return { "org.freedesktop.DBus.Deprecated":
1216
# Find an unused name
1217
for aname in (iname.format(i)
1218
for i in itertools.count()):
1219
if aname not in attr:
1223
# Replace the class with a new subclass of it with
1224
# methods, signals, etc. as created above.
1225
cls = type(b"{0}Alternate".format(cls.__name__),
1231
@alternate_dbus_interfaces({"se.recompile.Mandos":
1232
"se.bsnet.fukt.Mandos"})
1036
1233
class ClientDBus(Client, DBusObjectWithProperties):
1037
1234
"""A Client class using D-Bus
1363
1561
def Timeout_dbus_property(self, value=None):
1364
1562
if value is None: # get
1365
1563
return dbus.UInt64(self.timeout_milliseconds())
1564
old_timeout = self.timeout
1366
1565
self.timeout = datetime.timedelta(0, 0, 0, value)
1367
# Reschedule timeout
1566
# Reschedule disabling
1368
1567
if self.enabled:
1369
1568
now = datetime.datetime.utcnow()
1370
time_to_die = timedelta_to_milliseconds(
1371
(self.last_checked_ok + self.timeout) - now)
1372
if time_to_die <= 0:
1569
self.expires += self.timeout - old_timeout
1570
if self.expires <= now:
1373
1571
# The timeout has passed
1376
self.expires = (now +
1377
datetime.timedelta(milliseconds =
1379
1574
if (getattr(self, "disable_initiator_tag", None)
1382
1577
gobject.source_remove(self.disable_initiator_tag)
1383
self.disable_initiator_tag = (gobject.timeout_add
1578
self.disable_initiator_tag = (
1579
gobject.timeout_add(
1580
timedelta_to_milliseconds(self.expires - now),
1387
1583
# ExtendedTimeout - property
1388
1584
@dbus_service_property(_interface, signature="t",
1741
1930
use_ipv6: Boolean; to use IPv6 or not
1743
1932
def __init__(self, server_address, RequestHandlerClass,
1744
interface=None, use_ipv6=True):
1933
interface=None, use_ipv6=True, socketfd=None):
1934
"""If socketfd is set, use that file descriptor instead of
1935
creating a new one with socket.socket().
1745
1937
self.interface = interface
1747
1939
self.address_family = socket.AF_INET6
1940
if socketfd is not None:
1941
# Save the file descriptor
1942
self.socketfd = socketfd
1943
# Save the original socket.socket() function
1944
self.socket_socket = socket.socket
1945
# To implement --socket, we monkey patch socket.socket.
1947
# (When socketserver.TCPServer is a new-style class, we
1948
# could make self.socket into a property instead of monkey
1949
# patching socket.socket.)
1951
# Create a one-time-only replacement for socket.socket()
1952
@functools.wraps(socket.socket)
1953
def socket_wrapper(*args, **kwargs):
1954
# Restore original function so subsequent calls are
1956
socket.socket = self.socket_socket
1957
del self.socket_socket
1958
# This time only, return a new socket object from the
1959
# saved file descriptor.
1960
return socket.fromfd(self.socketfd, *args, **kwargs)
1961
# Replace socket.socket() function with wrapper
1962
socket.socket = socket_wrapper
1963
# The socketserver.TCPServer.__init__ will call
1964
# socket.socket(), which might be our replacement,
1965
# socket_wrapper(), if socketfd was set.
1748
1966
socketserver.TCPServer.__init__(self, server_address,
1749
1967
RequestHandlerClass)
1750
1969
def server_bind(self):
1751
1970
"""This overrides the normal server_bind() function
1752
1971
to bind to an interface if one was specified, and also NOT to
1761
1980
self.socket.setsockopt(socket.SOL_SOCKET,
1762
1981
SO_BINDTODEVICE,
1982
str(self.interface + '\0'))
1765
1983
except socket.error as error:
1766
if error[0] == errno.EPERM:
1767
logger.error("No permission to"
1768
" bind to interface %s",
1770
elif error[0] == errno.ENOPROTOOPT:
1984
if error.errno == errno.EPERM:
1985
logger.error("No permission to bind to"
1986
" interface %s", self.interface)
1987
elif error.errno == errno.ENOPROTOOPT:
1771
1988
logger.error("SO_BINDTODEVICE not available;"
1772
1989
" cannot bind to interface %s",
1773
1990
self.interface)
1991
elif error.errno == errno.ENODEV:
1992
logger.error("Interface %s does not exist,"
1993
" cannot bind", self.interface)
1776
1996
# Only bind(2) the socket if we really need to.
1836
2057
def handle_ipc(self, source, condition, parent_pipe=None,
1837
2058
proc = None, client_object=None):
1839
gobject.IO_IN: "IN", # There is data to read.
1840
gobject.IO_OUT: "OUT", # Data can be written (without
1842
gobject.IO_PRI: "PRI", # There is urgent data to read.
1843
gobject.IO_ERR: "ERR", # Error condition.
1844
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1845
# broken, usually for pipes and
1848
conditions_string = ' | '.join(name
1850
condition_names.iteritems()
1851
if cond & condition)
1852
2059
# error, or the other end of multiprocessing.Pipe has closed
1853
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
2060
if condition & (gobject.IO_ERR | gobject.IO_HUP):
1854
2061
# Wait for other process to exit
2124
def rfc3339_duration_to_delta(duration):
2125
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2127
>>> rfc3339_duration_to_delta("P7D")
2128
datetime.timedelta(7)
2129
>>> rfc3339_duration_to_delta("PT60S")
2130
datetime.timedelta(0, 60)
2131
>>> rfc3339_duration_to_delta("PT60M")
2132
datetime.timedelta(0, 3600)
2133
>>> rfc3339_duration_to_delta("PT24H")
2134
datetime.timedelta(1)
2135
>>> rfc3339_duration_to_delta("P1W")
2136
datetime.timedelta(7)
2137
>>> rfc3339_duration_to_delta("PT5M30S")
2138
datetime.timedelta(0, 330)
2139
>>> rfc3339_duration_to_delta("P1DT3M20S")
2140
datetime.timedelta(1, 200)
2143
# Parsing an RFC 3339 duration with regular expressions is not
2144
# possible - there would have to be multiple places for the same
2145
# values, like seconds. The current code, while more esoteric, is
2146
# cleaner without depending on a parsing library. If Python had a
2147
# built-in library for parsing we would use it, but we'd like to
2148
# avoid excessive use of external libraries.
2150
# New type for defining tokens, syntax, and semantics all-in-one
2151
Token = collections.namedtuple("Token",
2152
("regexp", # To match token; if
2153
# "value" is not None,
2154
# must have a "group"
2156
"value", # datetime.timedelta or
2158
"followers")) # Tokens valid after
2160
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2161
# the "duration" ABNF definition in RFC 3339, Appendix A.
2162
token_end = Token(re.compile(r"$"), None, frozenset())
2163
token_second = Token(re.compile(r"(\d+)S"),
2164
datetime.timedelta(seconds=1),
2165
frozenset((token_end,)))
2166
token_minute = Token(re.compile(r"(\d+)M"),
2167
datetime.timedelta(minutes=1),
2168
frozenset((token_second, token_end)))
2169
token_hour = Token(re.compile(r"(\d+)H"),
2170
datetime.timedelta(hours=1),
2171
frozenset((token_minute, token_end)))
2172
token_time = Token(re.compile(r"T"),
2174
frozenset((token_hour, token_minute,
2176
token_day = Token(re.compile(r"(\d+)D"),
2177
datetime.timedelta(days=1),
2178
frozenset((token_time, token_end)))
2179
token_month = Token(re.compile(r"(\d+)M"),
2180
datetime.timedelta(weeks=4),
2181
frozenset((token_day, token_end)))
2182
token_year = Token(re.compile(r"(\d+)Y"),
2183
datetime.timedelta(weeks=52),
2184
frozenset((token_month, token_end)))
2185
token_week = Token(re.compile(r"(\d+)W"),
2186
datetime.timedelta(weeks=1),
2187
frozenset((token_end,)))
2188
token_duration = Token(re.compile(r"P"), None,
2189
frozenset((token_year, token_month,
2190
token_day, token_time,
2192
# Define starting values
2193
value = datetime.timedelta() # Value so far
2195
followers = frozenset(token_duration,) # Following valid tokens
2196
s = duration # String left to parse
2197
# Loop until end token is found
2198
while found_token is not token_end:
2199
# Search for any currently valid tokens
2200
for token in followers:
2201
match = token.regexp.match(s)
2202
if match is not None:
2204
if token.value is not None:
2205
# Value found, parse digits
2206
factor = int(match.group(1), 10)
2207
# Add to value so far
2208
value += factor * token.value
2209
# Strip token from string
2210
s = token.regexp.sub("", s, 1)
2213
# Set valid next tokens
2214
followers = found_token.followers
2217
# No currently valid tokens were found
2218
raise ValueError("Invalid RFC 3339 duration")
1917
2223
def string_to_delta(interval):
1918
2224
"""Parse a string and return a datetime.timedelta
2011
2324
parser.add_argument("--no-dbus", action="store_false",
2012
2325
dest="use_dbus", help="Do not provide D-Bus"
2013
" system bus interface")
2326
" system bus interface", default=None)
2014
2327
parser.add_argument("--no-ipv6", action="store_false",
2015
dest="use_ipv6", help="Do not use IPv6")
2328
dest="use_ipv6", help="Do not use IPv6",
2016
2330
parser.add_argument("--no-restore", action="store_false",
2017
2331
dest="restore", help="Do not restore stored"
2332
" state", default=None)
2333
parser.add_argument("--socket", type=int,
2334
help="Specify a file descriptor to a network"
2335
" socket to use instead of creating one")
2019
2336
parser.add_argument("--statedir", metavar="DIR",
2020
2337
help="Directory to save/restore state in")
2338
parser.add_argument("--foreground", action="store_true",
2339
help="Run in foreground", default=None)
2340
parser.add_argument("--no-zeroconf", action="store_false",
2341
dest="zeroconf", help="Do not use Zeroconf",
2022
2344
options = parser.parse_args()
2024
2346
if options.check:
2348
fail_count, test_count = doctest.testmod()
2349
sys.exit(os.EX_OK if fail_count == 0 else 1)
2029
2351
# Default values for config file for server-global settings
2030
2352
server_defaults = { "interface": "",
2049
2374
# Convert the SafeConfigParser object to a dict
2050
2375
server_settings = server_config.defaults()
2051
2376
# Use the appropriate methods on the non-string config options
2052
for option in ("debug", "use_dbus", "use_ipv6"):
2377
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
2053
2378
server_settings[option] = server_config.getboolean("DEFAULT",
2055
2380
if server_settings["port"]:
2056
2381
server_settings["port"] = server_config.getint("DEFAULT",
2383
if server_settings["socket"]:
2384
server_settings["socket"] = server_config.getint("DEFAULT",
2386
# Later, stdin will, and stdout and stderr might, be dup'ed
2387
# over with an opened os.devnull. But we don't want this to
2388
# happen with a supplied network socket.
2389
if 0 <= server_settings["socket"] <= 2:
2390
server_settings["socket"] = os.dup(server_settings
2058
2392
del server_config
2060
2394
# Override the settings from the config file with command line
2071
2405
for option in server_settings.keys():
2072
2406
if type(server_settings[option]) is str:
2073
2407
server_settings[option] = unicode(server_settings[option])
2408
# Force all boolean options to be boolean
2409
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2410
"foreground", "zeroconf"):
2411
server_settings[option] = bool(server_settings[option])
2412
# Debug implies foreground
2413
if server_settings["debug"]:
2414
server_settings["foreground"] = True
2074
2415
# Now we have our good server settings in "server_settings"
2076
2417
##################################################################
2419
if (not server_settings["zeroconf"] and
2420
not (server_settings["port"]
2421
or server_settings["socket"] != "")):
2422
parser.error("Needs port or socket to work without"
2078
2425
# For convenience
2079
2426
debug = server_settings["debug"]
2080
2427
debuglevel = server_settings["debuglevel"]
2115
2468
use_ipv6=use_ipv6,
2116
2469
gnutls_priority=
2117
2470
server_settings["priority"],
2120
pidfilename = "/var/run/mandos.pid"
2474
pidfilename = "/run/mandos.pid"
2475
if not os.path.isdir("/run/."):
2476
pidfilename = "/var/run/mandos.pid"
2122
2479
pidfile = open(pidfilename, "w")
2124
logger.error("Could not open file %r", pidfilename)
2480
except IOError as e:
2481
logger.error("Could not open file %r", pidfilename,
2127
uid = pwd.getpwnam("_mandos").pw_uid
2128
gid = pwd.getpwnam("_mandos").pw_gid
2484
for name in ("_mandos", "mandos", "nobody"):
2131
uid = pwd.getpwnam("mandos").pw_uid
2132
gid = pwd.getpwnam("mandos").pw_gid
2486
uid = pwd.getpwnam(name).pw_uid
2487
gid = pwd.getpwnam(name).pw_gid
2133
2489
except KeyError:
2135
uid = pwd.getpwnam("nobody").pw_uid
2136
gid = pwd.getpwnam("nobody").pw_gid
2143
2497
except OSError as error:
2144
if error[0] != errno.EPERM:
2498
if error.errno != errno.EPERM:
2148
2502
# Enable all possible GnuTLS debugging
2159
2513
.gnutls_global_set_log_function(debug_gnutls))
2161
2515
# Redirect stdin so all checkers get /dev/null
2162
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2516
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2163
2517
os.dup2(null, sys.stdin.fileno())
2167
2521
# Need to fork before connecting to D-Bus
2169
2523
# Close all input and output, do double fork, etc.
2526
# multiprocessing will use threads, so before we use gobject we
2527
# need to inform gobject that threads will be used.
2172
2528
gobject.threads_init()
2174
2530
global main_loop
2175
2531
# From the Avahi example code
2176
DBusGMainLoop(set_as_default=True )
2532
DBusGMainLoop(set_as_default=True)
2177
2533
main_loop = gobject.MainLoop()
2178
2534
bus = dbus.SystemBus()
2179
2535
# End of Avahi example code
2185
2541
("se.bsnet.fukt.Mandos", bus,
2186
2542
do_not_queue=True))
2187
2543
except dbus.exceptions.NameExistsException as e:
2188
logger.error(unicode(e) + ", disabling D-Bus")
2544
logger.error("Disabling D-Bus:", exc_info=e)
2189
2545
use_dbus = False
2190
2546
server_settings["use_dbus"] = False
2191
2547
tcp_server.use_dbus = False
2192
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2193
service = AvahiServiceToSyslog(name =
2194
server_settings["servicename"],
2195
servicetype = "_mandos._tcp",
2196
protocol = protocol, bus = bus)
2197
if server_settings["interface"]:
2198
service.interface = (if_nametoindex
2199
(str(server_settings["interface"])))
2549
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2550
service = AvahiServiceToSyslog(name =
2551
server_settings["servicename"],
2552
servicetype = "_mandos._tcp",
2553
protocol = protocol, bus = bus)
2554
if server_settings["interface"]:
2555
service.interface = (if_nametoindex
2556
(str(server_settings["interface"])))
2201
2558
global multiprocessing_manager
2202
2559
multiprocessing_manager = multiprocessing.Manager()
2204
2561
client_class = Client
2206
client_class = functools.partial(ClientDBusTransitional,
2563
client_class = functools.partial(ClientDBus, bus = bus)
2209
2565
client_settings = Client.config_parser(client_config)
2210
2566
old_client_settings = {}
2211
2567
clients_data = {}
2569
# This is used to redirect stdout and stderr for checker processes
2571
wnull = open(os.devnull, "w") # A writable /dev/null
2572
# Only used if server is running in foreground but not in debug
2574
if debug or not foreground:
2213
2577
# Get client data and settings from last running state.
2214
2578
if server_settings["restore"]:
2218
2582
(stored_state))
2219
2583
os.remove(stored_state_path)
2220
2584
except IOError as e:
2221
logger.warning("Could not load persistent state: {0}"
2223
if e.errno != errno.ENOENT:
2585
if e.errno == errno.ENOENT:
2586
logger.warning("Could not load persistent state: {0}"
2587
.format(os.strerror(e.errno)))
2589
logger.critical("Could not load persistent state:",
2225
2592
except EOFError as e:
2226
2593
logger.warning("Could not load persistent state: "
2227
"EOFError: {0}".format(e))
2594
"EOFError:", exc_info=e)
2229
2596
with PGPEngine() as pgp:
2230
2597
for client_name, client in clients_data.iteritems():
2598
# Skip removed clients
2599
if client_name not in client_settings:
2231
2602
# Decide which value to use after restoring saved state.
2232
2603
# We have three different values: Old config file,
2233
2604
# new config file, and saved state.
2292
2662
for client_name in (set(client_settings)
2293
2663
- set(old_client_settings)):
2294
2664
clients_data[client_name] = client_settings[client_name]
2296
2666
# Create all client objects
2297
2667
for client_name, client in clients_data.iteritems():
2298
2668
tcp_server.clients[client_name] = client_class(
2299
name = client_name, settings = client)
2669
name = client_name, settings = client,
2670
server_settings = server_settings)
2301
2672
if not tcp_server.clients:
2302
2673
logger.warning("No clients defined")
2308
pidfile.write(str(pid) + "\n".encode("utf-8"))
2311
logger.error("Could not write to file %r with PID %d",
2314
# "pidfile" was never created
2676
if pidfile is not None:
2680
pidfile.write(str(pid) + "\n".encode("utf-8"))
2682
logger.error("Could not write to file %r with PID %d",
2316
2685
del pidfilename
2317
signal.signal(signal.SIGINT, signal.SIG_IGN)
2319
2687
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2320
2688
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2323
class MandosDBusService(dbus.service.Object):
2691
@alternate_dbus_interfaces({"se.recompile.Mandos":
2692
"se.bsnet.fukt.Mandos"})
2693
class MandosDBusService(DBusObjectWithProperties):
2324
2694
"""A D-Bus proxy object"""
2325
2695
def __init__(self):
2326
2696
dbus.service.Object.__init__(self, bus, "/")
2327
2697
_interface = "se.recompile.Mandos"
2699
@dbus_interface_annotations(_interface)
2701
return { "org.freedesktop.DBus.Property"
2702
".EmitsChangedSignal":
2329
2705
@dbus.service.signal(_interface, signature="o")
2330
2706
def ClientAdded(self, objpath):
2414
2790
del client_settings[client.name]["secret"]
2417
tempfd, tempname = tempfile.mkstemp(suffix=".pickle",
2420
(stored_state_path))
2421
with os.fdopen(tempfd, "wb") as stored_state:
2793
with (tempfile.NamedTemporaryFile
2794
(mode='wb', suffix=".pickle", prefix='clients-',
2795
dir=os.path.dirname(stored_state_path),
2796
delete=False)) as stored_state:
2422
2797
pickle.dump((clients, client_settings), stored_state)
2798
tempname=stored_state.name
2423
2799
os.rename(tempname, stored_state_path)
2424
2800
except (IOError, OSError) as e:
2425
logger.warning("Could not save persistent state: {0}"
2429
2803
os.remove(tempname)
2430
2804
except NameError:
2432
if e.errno not in set((errno.ENOENT, errno.EACCES,
2806
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
2807
logger.warning("Could not save persistent state: {0}"
2808
.format(os.strerror(e.errno)))
2810
logger.warning("Could not save persistent state:",
2436
2814
# Delete all clients, and settings from config
2437
2815
while tcp_server.clients:
2461
2839
tcp_server.server_activate()
2463
2841
# Find out what port we got
2464
service.port = tcp_server.socket.getsockname()[1]
2843
service.port = tcp_server.socket.getsockname()[1]
2466
2845
logger.info("Now listening on address %r, port %d,"
2467
" flowinfo %d, scope_id %d"
2468
% tcp_server.socket.getsockname())
2846
" flowinfo %d, scope_id %d",
2847
*tcp_server.socket.getsockname())
2470
logger.info("Now listening on address %r, port %d"
2471
% tcp_server.socket.getsockname())
2849
logger.info("Now listening on address %r, port %d",
2850
*tcp_server.socket.getsockname())
2473
2852
#service.interface = tcp_server.socket.getsockname()[3]
2476
# From the Avahi example code
2479
except dbus.exceptions.DBusException as error:
2480
logger.critical("DBusException: %s", error)
2483
# End of Avahi example code
2856
# From the Avahi example code
2859
except dbus.exceptions.DBusException as error:
2860
logger.critical("D-Bus Exception", exc_info=error)
2863
# End of Avahi example code
2485
2865
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2486
2866
lambda *args, **kwargs: