370
379
self.server_state_changed)
371
380
self.server_state_changed(self.server.GetState())
373
383
class AvahiServiceToSyslog(AvahiService):
374
384
def rename(self):
375
385
"""Add the new name to the syslog messages"""
376
386
ret = AvahiService.rename(self)
377
387
syslogger.setFormatter(logging.Formatter
378
('Mandos (%s) [%%(process)d]:'
379
' %%(levelname)s: %%(message)s'
388
('Mandos ({0}) [%(process)d]:'
389
' %(levelname)s: %(message)s'
383
394
def timedelta_to_milliseconds(td):
384
395
"Convert a datetime.timedelta() to milliseconds"
385
396
return ((td.days * 24 * 60 * 60 * 1000)
386
397
+ (td.seconds * 1000)
387
398
+ (td.microseconds // 1000))
389
401
class Client(object):
390
402
"""A representation of a client host served by this server.
432
444
runtime_expansions = ("approval_delay", "approval_duration",
433
"created", "enabled", "fingerprint",
434
"host", "interval", "last_checked_ok",
445
"created", "enabled", "expires",
446
"fingerprint", "host", "interval",
447
"last_approval_request", "last_checked_ok",
435
448
"last_enabled", "name", "timeout")
436
449
client_defaults = { "timeout": "5m",
437
450
"extended_timeout": "15m",
567
576
if getattr(self, "enabled", False):
568
577
# Already enabled
570
self.send_changedstate()
571
579
self.expires = datetime.datetime.utcnow() + self.timeout
572
580
self.enabled = True
573
581
self.last_enabled = datetime.datetime.utcnow()
574
582
self.init_checker()
583
self.send_changedstate()
576
585
def disable(self, quiet=True):
577
586
"""Disable this client."""
578
587
if not getattr(self, "enabled", False):
581
self.send_changedstate()
583
590
logger.info("Disabling client %s", self.name)
584
if getattr(self, "disable_initiator_tag", False):
591
if getattr(self, "disable_initiator_tag", None) is not None:
585
592
gobject.source_remove(self.disable_initiator_tag)
586
593
self.disable_initiator_tag = None
587
594
self.expires = None
588
if getattr(self, "checker_initiator_tag", False):
595
if getattr(self, "checker_initiator_tag", None) is not None:
589
596
gobject.source_remove(self.checker_initiator_tag)
590
597
self.checker_initiator_tag = None
591
598
self.stop_checker()
592
599
self.enabled = False
601
self.send_changedstate()
593
602
# Do not run this again if called by a gobject.timeout_add
599
608
def init_checker(self):
600
609
# Schedule a new checker to be started an 'interval' from now,
601
610
# and every interval from then on.
611
if self.checker_initiator_tag is not None:
612
gobject.source_remove(self.checker_initiator_tag)
602
613
self.checker_initiator_tag = (gobject.timeout_add
603
614
(self.interval_milliseconds(),
604
615
self.start_checker))
605
616
# Schedule a disable() when 'timeout' has passed
617
if self.disable_initiator_tag is not None:
618
gobject.source_remove(self.disable_initiator_tag)
606
619
self.disable_initiator_tag = (gobject.timeout_add
607
620
(self.timeout_milliseconds(),
654
668
If a checker already exists, leave it running and do
656
670
# The reason for not killing a running checker is that if we
657
# did that, then if a checker (for some reason) started
658
# running slowly and taking more than 'interval' time, the
659
# client would inevitably timeout, since no checker would get
660
# 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
661
675
# checkers alone, the checker would have to take more time
662
676
# than 'timeout' for the client to be disabled, which is as it
677
691
self.current_checker_command)
678
692
# Start a new checker if needed
679
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)
681
# In case checker_command has exactly one % operator
682
command = self.checker_command % self.host
684
# Escape attributes for the shell
685
escaped_attrs = dict(
687
re.escape(unicode(str(getattr(self, attr, "")),
691
self.runtime_expansions)
694
command = self.checker_command % escaped_attrs
695
except TypeError as error:
696
logger.error('Could not format string "%s":'
697
' %s', self.checker_command, error)
698
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
699
705
self.current_checker_command = command
701
707
logger.info("Starting checker %r for %s",
707
713
self.checker = subprocess.Popen(command,
709
715
shell=True, cwd="/")
710
self.checker_callback_tag = (gobject.child_watch_add
712
self.checker_callback,
714
# The checker may have completed before the gobject
715
# watch was added. Check for this.
716
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
718
gobject.source_remove(self.checker_callback_tag)
719
self.checker_callback(pid, status, command)
720
716
except OSError as error:
721
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)
723
729
# Re-run this periodically if run by gobject.timeout_add
976
982
tag.appendChild(ann_tag)
977
983
# Add interface annotation tags
978
984
for annotation, value in dict(
980
*(annotations().iteritems()
981
for name, annotations in
982
self._get_all_dbus_things("interface")
983
if name == if_tag.getAttribute("name")
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")
985
991
ann_tag = document.createElement("annotation")
986
992
ann_tag.setAttribute("name", annotation)
987
993
ann_tag.setAttribute("value", value)
1006
1012
except (AttributeError, xml.dom.DOMException,
1007
1013
xml.parsers.expat.ExpatError) as error:
1008
1014
logger.error("Failed to override Introspection method",
1010
1016
return xmlstring
1013
def datetime_to_dbus (dt, variant_level=0):
1019
def datetime_to_dbus(dt, variant_level=0):
1014
1020
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1016
1022
return dbus.String("", variant_level = variant_level)
1018
1024
variant_level=variant_level)
1021
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
1023
"""Applied to an empty subclass of a D-Bus object, this metaclass
1024
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).
1026
def __new__(mcs, name, bases, attr):
1027
# Go through all the base classes which could have D-Bus
1028
# methods, signals, or properties in them
1029
old_interface_names = []
1030
for base in (b for b in bases
1031
if issubclass(b, dbus.service.Object)):
1032
# Go though all attributes of the base class
1033
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):
1034
1057
# Ignore non-D-Bus attributes, and D-Bus attributes
1035
1058
# with the wrong interface name
1036
1059
if (not hasattr(attribute, "_dbus_interface")
1037
1060
or not attribute._dbus_interface
1038
.startswith("se.recompile.Mandos")):
1061
.startswith(orig_interface_name)):
1040
1063
# Create an alternate D-Bus interface name based on
1041
1064
# the current name
1042
1065
alt_interface = (attribute._dbus_interface
1043
.replace("se.recompile.Mandos",
1044
"se.bsnet.fukt.Mandos"))
1045
if alt_interface != attribute._dbus_interface:
1046
old_interface_names.append(alt_interface)
1066
.replace(orig_interface_name,
1067
alt_interface_name))
1068
interface_names.add(alt_interface)
1047
1069
# Is this a D-Bus signal?
1048
1070
if getattr(attribute, "_dbus_is_signal", False):
1049
1071
# Extract the original non-method function by
1071
1093
except AttributeError:
1073
1095
# Define a creator of a function to call both the
1074
# old and new functions, so both the old and new
1075
# 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
1076
1099
def fixscope(func1, func2):
1077
1100
"""This function is a scope container to pass
1078
1101
func1 and func2 to the "call_both" function
1085
1108
return call_both
1086
1109
# Create the "call_both" function and add it to
1088
attr[attrname] = fixscope(attribute,
1111
attr[attrname] = fixscope(attribute, new_function)
1090
1112
# Is this a D-Bus method?
1091
1113
elif getattr(attribute, "_dbus_is_method", False):
1092
1114
# Create a new, but exactly alike, function
1148
1170
attribute.func_name,
1149
1171
attribute.func_defaults,
1150
1172
attribute.func_closure)))
1151
# Deprecate all old interfaces
1152
basename="_AlternateDBusNamesMetaclass_interface_annotation{0}"
1153
for old_interface_name in old_interface_names:
1154
@dbus_interface_annotations(old_interface_name)
1156
return { "org.freedesktop.DBus.Deprecated": "true" }
1157
# Find an unused name
1158
for aname in (basename.format(i) for i in
1160
if aname not in attr:
1163
return type.__new__(mcs, name, bases, attr)
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"})
1166
1198
class ClientDBus(Client, DBusObjectWithProperties):
1167
1199
"""A Client class using D-Bus
1500
1530
def Timeout_dbus_property(self, value=None):
1501
1531
if value is None: # get
1502
1532
return dbus.UInt64(self.timeout_milliseconds())
1533
old_timeout = self.timeout
1503
1534
self.timeout = datetime.timedelta(0, 0, 0, value)
1504
# Reschedule timeout
1535
# Reschedule disabling
1505
1536
if self.enabled:
1506
1537
now = datetime.datetime.utcnow()
1507
time_to_die = timedelta_to_milliseconds(
1508
(self.last_checked_ok + self.timeout) - now)
1509
if time_to_die <= 0:
1538
self.expires += self.timeout - old_timeout
1539
if self.expires <= now:
1510
1540
# The timeout has passed
1513
self.expires = (now +
1514
datetime.timedelta(milliseconds =
1516
1543
if (getattr(self, "disable_initiator_tag", None)
1519
1546
gobject.source_remove(self.disable_initiator_tag)
1520
self.disable_initiator_tag = (gobject.timeout_add
1547
self.disable_initiator_tag = (
1548
gobject.timeout_add(
1549
timedelta_to_milliseconds(self.expires - now),
1524
1552
# ExtendedTimeout - property
1525
1553
@dbus_service_property(_interface, signature="t",
1717
1741
#wait until timeout or approved
1718
1742
time = datetime.datetime.now()
1719
1743
client.changedstate.acquire()
1720
(client.changedstate.wait
1721
(float(client.timedelta_to_milliseconds(delay)
1744
client.changedstate.wait(
1745
float(timedelta_to_milliseconds(delay)
1723
1747
client.changedstate.release()
1724
1748
time2 = datetime.datetime.now()
1725
1749
if (time2 - time) >= delay:
1874
1899
use_ipv6: Boolean; to use IPv6 or not
1876
1901
def __init__(self, server_address, RequestHandlerClass,
1877
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().
1878
1906
self.interface = interface
1880
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.
1881
1935
socketserver.TCPServer.__init__(self, server_address,
1882
1936
RequestHandlerClass)
1883
1938
def server_bind(self):
1884
1939
"""This overrides the normal server_bind() function
1885
1940
to bind to an interface if one was specified, and also NOT to
1896
1951
str(self.interface
1898
1953
except socket.error as error:
1899
if error[0] == errno.EPERM:
1954
if error.errno == errno.EPERM:
1900
1955
logger.error("No permission to"
1901
1956
" bind to interface %s",
1902
1957
self.interface)
1903
elif error[0] == errno.ENOPROTOOPT:
1958
elif error.errno == errno.ENOPROTOOPT:
1904
1959
logger.error("SO_BINDTODEVICE not available;"
1905
1960
" cannot bind to interface %s",
1906
1961
self.interface)
1962
elif error.errno == errno.ENODEV:
1963
logger.error("Interface %s does not"
1964
" exist, cannot bind",
1909
1968
# Only bind(2) the socket if we really need to.
1969
2029
def handle_ipc(self, source, condition, parent_pipe=None,
1970
2030
proc = None, client_object=None):
1972
gobject.IO_IN: "IN", # There is data to read.
1973
gobject.IO_OUT: "OUT", # Data can be written (without
1975
gobject.IO_PRI: "PRI", # There is urgent data to read.
1976
gobject.IO_ERR: "ERR", # Error condition.
1977
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1978
# broken, usually for pipes and
1981
conditions_string = ' | '.join(name
1983
condition_names.iteritems()
1984
if cond & condition)
1985
2031
# error, or the other end of multiprocessing.Pipe has closed
1986
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
2032
if condition & (gobject.IO_ERR | gobject.IO_HUP):
1987
2033
# Wait for other process to exit
2102
2149
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2103
2150
if not stat.S_ISCHR(os.fstat(null).st_mode):
2104
2151
raise OSError(errno.ENODEV,
2105
"%s not a character device"
2152
"{0} not a character device"
2153
.format(os.devnull))
2107
2154
os.dup2(null, sys.stdin.fileno())
2108
2155
os.dup2(null, sys.stdout.fileno())
2109
2156
os.dup2(null, sys.stderr.fileno())
2119
2166
parser = argparse.ArgumentParser()
2120
2167
parser.add_argument("-v", "--version", action="version",
2121
version = "%%(prog)s %s" % version,
2168
version = "%(prog)s {0}".format(version),
2122
2169
help="show version number and exit")
2123
2170
parser.add_argument("-i", "--interface", metavar="IF",
2124
2171
help="Bind to interface IF")
2149
2196
parser.add_argument("--no-restore", action="store_false",
2150
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")
2152
2202
parser.add_argument("--statedir", metavar="DIR",
2153
2203
help="Directory to save/restore state in")
2188
2239
if server_settings["port"]:
2189
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
2191
2251
del server_config
2193
2253
# Override the settings from the config file with command line
2195
2255
for option in ("interface", "address", "port", "debug",
2196
2256
"priority", "servicename", "configdir",
2197
2257
"use_dbus", "use_ipv6", "debuglevel", "restore",
2258
"statedir", "socket"):
2199
2259
value = getattr(options, option)
2200
2260
if value is not None:
2201
2261
server_settings[option] = value
2228
2288
if server_settings["servicename"] != "Mandos":
2229
2289
syslogger.setFormatter(logging.Formatter
2230
('Mandos (%s) [%%(process)d]:'
2231
' %%(levelname)s: %%(message)s'
2232
% server_settings["servicename"]))
2290
('Mandos ({0}) [%(process)d]:'
2291
' %(levelname)s: %(message)s'
2292
.format(server_settings
2234
2295
# Parse config file with clients
2235
2296
client_config = configparser.SafeConfigParser(Client
2248
2309
use_ipv6=use_ipv6,
2249
2310
gnutls_priority=
2250
2311
server_settings["priority"],
2313
socketfd=(server_settings["socket"]
2253
2316
pidfilename = "/var/run/mandos.pid"
2255
2318
pidfile = open(pidfilename, "w")
2257
logger.error("Could not open file %r", pidfilename)
2319
except IOError as e:
2320
logger.error("Could not open file %r", pidfilename,
2260
uid = pwd.getpwnam("_mandos").pw_uid
2261
gid = pwd.getpwnam("_mandos").pw_gid
2323
for name in ("_mandos", "mandos", "nobody"):
2264
uid = pwd.getpwnam("mandos").pw_uid
2265
gid = pwd.getpwnam("mandos").pw_gid
2325
uid = pwd.getpwnam(name).pw_uid
2326
gid = pwd.getpwnam(name).pw_gid
2266
2328
except KeyError:
2268
uid = pwd.getpwnam("nobody").pw_uid
2269
gid = pwd.getpwnam("nobody").pw_gid
2276
2336
except OSError as error:
2277
if error[0] != errno.EPERM:
2337
if error.errno != errno.EPERM:
2351
2412
(stored_state))
2352
2413
os.remove(stored_state_path)
2353
2414
except IOError as e:
2354
logger.warning("Could not load persistent state: {0}"
2356
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:",
2358
2422
except EOFError as e:
2359
2423
logger.warning("Could not load persistent state: "
2360
"EOFError: {0}".format(e))
2424
"EOFError:", exc_info=e)
2362
2426
with PGPEngine() as pgp:
2363
2427
for client_name, client in clients_data.iteritems():
2447
2510
# "pidfile" was never created
2449
2512
del pidfilename
2450
signal.signal(signal.SIGINT, signal.SIG_IGN)
2452
2514
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2453
2515
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2518
@alternate_dbus_interfaces({"se.recompile.Mandos":
2519
"se.bsnet.fukt.Mandos"})
2456
2520
class MandosDBusService(DBusObjectWithProperties):
2457
2521
"""A D-Bus proxy object"""
2458
2522
def __init__(self):
2553
2615
del client_settings[client.name]["secret"]
2556
tempfd, tempname = tempfile.mkstemp(suffix=".pickle",
2559
(stored_state_path))
2560
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:
2561
2622
pickle.dump((clients, client_settings), stored_state)
2623
tempname=stored_state.name
2562
2624
os.rename(tempname, stored_state_path)
2563
2625
except (IOError, OSError) as e:
2564
logger.warning("Could not save persistent state: {0}"
2568
2628
os.remove(tempname)
2569
2629
except NameError:
2571
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:",
2575
2639
# Delete all clients, and settings from config
2603
2667
service.port = tcp_server.socket.getsockname()[1]
2605
2669
logger.info("Now listening on address %r, port %d,"
2606
" flowinfo %d, scope_id %d"
2607
% tcp_server.socket.getsockname())
2670
" flowinfo %d, scope_id %d",
2671
*tcp_server.socket.getsockname())
2609
logger.info("Now listening on address %r, port %d"
2610
% tcp_server.socket.getsockname())
2673
logger.info("Now listening on address %r, port %d",
2674
*tcp_server.socket.getsockname())
2612
2676
#service.interface = tcp_server.socket.getsockname()[3]