111
111
return interface_index
114
def initlogger(level=logging.WARNING):
114
def initlogger(debug, level=logging.WARNING):
115
115
"""init logger and add loglevel"""
118
syslogger = (logging.handlers.SysLogHandler
120
logging.handlers.SysLogHandler.LOG_DAEMON,
121
address = str("/dev/log")))
117
122
syslogger.setFormatter(logging.Formatter
118
123
('Mandos [%(process)d]: %(levelname)s:'
120
125
logger.addHandler(syslogger)
122
console = logging.StreamHandler()
123
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
127
logger.addHandler(console)
128
console = logging.StreamHandler()
129
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
133
logger.addHandler(console)
128
134
logger.setLevel(level)
131
class CryptoError(Exception):
137
class PGPError(Exception):
138
"""Exception if encryption/decryption fails"""
135
class Crypto(object):
142
class PGPEngine(object):
136
143
"""A simple class for OpenPGP symmetric encryption & decryption"""
137
144
def __init__(self):
138
self.gnupg = GnuPGInterface.GnuPG()
139
145
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
140
self.gnupg = GnuPGInterface.GnuPG()
141
self.gnupg.options.meta_interactive = False
142
self.gnupg.options.homedir = self.tempdir
143
self.gnupg.options.extra_args.extend(['--force-mdc',
146
self.gnupgargs = ['--batch',
147
'--home', self.tempdir,
146
152
def __enter__(self):
149
def __exit__ (self, exc_type, exc_value, traceback):
155
def __exit__(self, exc_type, exc_value, traceback):
169
175
def password_encode(self, password):
170
176
# Passphrase can not be empty and can not contain newlines or
171
177
# NUL bytes. So we prefix it and hex encode it.
172
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"))
174
186
def encrypt(self, data, password):
175
self.gnupg.passphrase = self.password_encode(password)
176
with open(os.devnull) as devnull:
178
proc = self.gnupg.run(['--symmetric'],
179
create_fhs=['stdin', 'stdout'],
180
attach_fhs={'stderr': devnull})
181
with contextlib.closing(proc.handles['stdin']) as f:
183
with contextlib.closing(proc.handles['stdout']) as f:
184
ciphertext = f.read()
188
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:
189
202
return ciphertext
191
204
def decrypt(self, data, password):
192
self.gnupg.passphrase = self.password_encode(password)
193
with open(os.devnull) as devnull:
195
proc = self.gnupg.run(['--decrypt'],
196
create_fhs=['stdin', 'stdout'],
197
attach_fhs={'stderr': devnull})
198
with contextlib.closing(proc.handles['stdin'] ) as f:
200
with contextlib.closing(proc.handles['stdout']) as f:
201
decrypted_plaintext = f.read()
205
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:
206
221
return decrypted_plaintext
210
224
class AvahiError(Exception):
211
225
def __init__(self, value, *args, **kwargs):
212
226
self.value = value
411
429
interval: datetime.timedelta(); How often to start a new checker
412
430
last_approval_request: datetime.datetime(); (UTC) or None
413
431
last_checked_ok: datetime.datetime(); (UTC) or None
415
432
last_checker_status: integer between 0 and 255 reflecting exit
416
433
status of last checker. -1 reflects crashed
418
last_enabled: datetime.datetime(); (UTC)
434
checker, -2 means no checker completed yet.
435
last_enabled: datetime.datetime(); (UTC) or None
419
436
name: string; from the config file, used in log messages and
420
437
D-Bus identifiers
421
438
secret: bytestring; sent verbatim (over TLS) to client
422
439
timeout: datetime.timedelta(); How long from last_checked_ok
423
440
until this client is disabled
424
extended_timeout: extra long timeout when password has been sent
441
extended_timeout: extra long timeout when secret has been sent
425
442
runtime_expansions: Allowed attributes for runtime expansion.
426
443
expires: datetime.datetime(); time (UTC) when a client will be
427
444
disabled, or None
445
server_settings: The server_settings dict from main()
430
448
runtime_expansions = ("approval_delay", "approval_duration",
431
"created", "enabled", "fingerprint",
432
"host", "interval", "last_checked_ok",
449
"created", "enabled", "expires",
450
"fingerprint", "host", "interval",
451
"last_approval_request", "last_checked_ok",
433
452
"last_enabled", "name", "timeout")
435
def timeout_milliseconds(self):
436
"Return the 'timeout' attribute in milliseconds"
437
return _timedelta_to_milliseconds(self.timeout)
439
def extended_timeout_milliseconds(self):
440
"Return the 'extended_timeout' attribute in milliseconds"
441
return _timedelta_to_milliseconds(self.extended_timeout)
443
def interval_milliseconds(self):
444
"Return the 'interval' attribute in milliseconds"
445
return _timedelta_to_milliseconds(self.interval)
447
def approval_delay_milliseconds(self):
448
return _timedelta_to_milliseconds(self.approval_delay)
450
def __init__(self, name = None, config=None):
451
"""Note: the 'checker' key in 'config' sets the
452
'checker_command' attribute and *not* the 'checker'
453
client_defaults = { "timeout": "PT5M",
454
"extended_timeout": "PT15M",
456
"checker": "fping -q -- %%(host)s",
458
"approval_delay": "PT0S",
459
"approval_duration": "PT1S",
460
"approved_by_default": "True",
465
def config_parser(config):
466
"""Construct a new dict of client settings of this form:
467
{ client_name: {setting_name: value, ...}, ...}
468
with exceptions for any special settings as defined above.
469
NOTE: Must be a pure function. Must return the same result
470
value given the same arguments.
473
for client_name in config.sections():
474
section = dict(config.items(client_name))
475
client = settings[client_name] = {}
477
client["host"] = section["host"]
478
# Reformat values from string types to Python types
479
client["approved_by_default"] = config.getboolean(
480
client_name, "approved_by_default")
481
client["enabled"] = config.getboolean(client_name,
484
client["fingerprint"] = (section["fingerprint"].upper()
486
if "secret" in section:
487
client["secret"] = section["secret"].decode("base64")
488
elif "secfile" in section:
489
with open(os.path.expanduser(os.path.expandvars
490
(section["secfile"])),
492
client["secret"] = secfile.read()
494
raise TypeError("No secret or secfile for section {}"
496
client["timeout"] = string_to_delta(section["timeout"])
497
client["extended_timeout"] = string_to_delta(
498
section["extended_timeout"])
499
client["interval"] = string_to_delta(section["interval"])
500
client["approval_delay"] = string_to_delta(
501
section["approval_delay"])
502
client["approval_duration"] = string_to_delta(
503
section["approval_duration"])
504
client["checker_command"] = section["checker"]
505
client["last_approval_request"] = None
506
client["last_checked_ok"] = None
507
client["last_checker_status"] = -2
511
def __init__(self, settings, name = None, server_settings=None):
513
if server_settings is None:
515
self.server_settings = server_settings
516
# adding all client settings
517
for setting, value in settings.items():
518
setattr(self, setting, value)
521
if not hasattr(self, "last_enabled"):
522
self.last_enabled = datetime.datetime.utcnow()
523
if not hasattr(self, "expires"):
524
self.expires = (datetime.datetime.utcnow()
527
self.last_enabled = None
457
530
logger.debug("Creating client %r", self.name)
458
531
# Uppercase and remove spaces from fingerprint for later
459
532
# comparison purposes with return value from the fingerprint()
461
self.fingerprint = (config["fingerprint"].upper()
463
534
logger.debug(" Fingerprint: %s", self.fingerprint)
464
if "secret" in config:
465
self.secret = config["secret"].decode("base64")
466
elif "secfile" in config:
467
with open(os.path.expanduser(os.path.expandvars
468
(config["secfile"])),
470
self.secret = secfile.read()
472
raise TypeError("No secret or secfile for client %s"
474
self.host = config.get("host", "")
475
self.created = datetime.datetime.utcnow()
477
self.last_approval_request = None
478
self.last_enabled = datetime.datetime.utcnow()
479
self.last_checked_ok = None
480
self.last_checker_status = None
481
self.timeout = string_to_delta(config["timeout"])
482
self.extended_timeout = string_to_delta(config
483
["extended_timeout"])
484
self.interval = string_to_delta(config["interval"])
535
self.created = settings.get("created",
536
datetime.datetime.utcnow())
538
# attributes specific for this server instance
485
539
self.checker = None
486
540
self.checker_initiator_tag = None
487
541
self.disable_initiator_tag = None
488
self.expires = datetime.datetime.utcnow() + self.timeout
489
542
self.checker_callback_tag = None
490
self.checker_command = config["checker"]
491
543
self.current_checker_command = None
492
self._approved = None
493
self.approved_by_default = config.get("approved_by_default",
495
545
self.approvals_pending = 0
496
self.approval_delay = string_to_delta(
497
config["approval_delay"])
498
self.approval_duration = string_to_delta(
499
config["approval_duration"])
500
546
self.changedstate = (multiprocessing_manager
501
547
.Condition(multiprocessing_manager
658
705
# in normal mode, that is already done by daemon(),
659
706
# and in debug mode we don't want to. (Stdin is
660
707
# always replaced by /dev/null.)
708
# The exception is when not debugging but nevertheless
709
# running in the foreground; use the previously
712
if (not self.server_settings["debug"]
713
and self.server_settings["foreground"]):
714
popen_args.update({"stdout": wnull,
661
716
self.checker = subprocess.Popen(command,
664
self.checker_callback_tag = (gobject.child_watch_add
666
self.checker_callback,
668
# The checker may have completed before the gobject
669
# watch was added. Check for this.
720
except OSError as error:
721
logger.error("Failed to start subprocess",
724
self.checker_callback_tag = (gobject.child_watch_add
726
self.checker_callback,
728
# The checker may have completed before the gobject
729
# watch was added. Check for this.
670
731
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
672
gobject.source_remove(self.checker_callback_tag)
673
self.checker_callback(pid, status, command)
674
732
except OSError as error:
675
logger.error("Failed to start subprocess: %s",
733
if error.errno == errno.ECHILD:
734
# This should never happen
735
logger.error("Child process vanished",
740
gobject.source_remove(self.checker_callback_tag)
741
self.checker_callback(pid, status, command)
677
742
# Re-run this periodically if run by gobject.timeout_add
853
969
e.setAttribute("access", prop._dbus_access)
855
971
for if_tag in document.getElementsByTagName("interface"):
856
973
for tag in (make_tag(document, name, prop)
858
in self._get_all_dbus_properties()
975
in self._get_all_dbus_things("property")
859
976
if prop._dbus_interface
860
977
== if_tag.getAttribute("name")):
861
978
if_tag.appendChild(tag)
979
# Add annotation tags
980
for typ in ("method", "signal", "property"):
981
for tag in if_tag.getElementsByTagName(typ):
983
for name, prop in (self.
984
_get_all_dbus_things(typ)):
985
if (name == tag.getAttribute("name")
986
and prop._dbus_interface
987
== if_tag.getAttribute("name")):
988
annots.update(getattr
992
for name, value in annots.items():
993
ann_tag = document.createElement(
995
ann_tag.setAttribute("name", name)
996
ann_tag.setAttribute("value", value)
997
tag.appendChild(ann_tag)
998
# Add interface annotation tags
999
for annotation, value in dict(
1000
itertools.chain.from_iterable(
1001
annotations().items()
1002
for name, annotations in
1003
self._get_all_dbus_things("interface")
1004
if name == if_tag.getAttribute("name")
1006
ann_tag = document.createElement("annotation")
1007
ann_tag.setAttribute("name", annotation)
1008
ann_tag.setAttribute("value", value)
1009
if_tag.appendChild(ann_tag)
862
1010
# Add the names to the return values for the
863
1011
# "org.freedesktop.DBus.Properties" methods
864
1012
if (if_tag.getAttribute("name")
891
1039
variant_level=variant_level)
894
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
896
"""Applied to an empty subclass of a D-Bus object, this metaclass
897
will add additional D-Bus attributes matching a certain pattern.
1042
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1043
"""A class decorator; applied to a subclass of
1044
dbus.service.Object, it will add alternate D-Bus attributes with
1045
interface names according to the "alt_interface_names" mapping.
1048
@alternate_dbus_interfaces({"org.example.Interface":
1049
"net.example.AlternateInterface"})
1050
class SampleDBusObject(dbus.service.Object):
1051
@dbus.service.method("org.example.Interface")
1052
def SampleDBusMethod():
1055
The above "SampleDBusMethod" on "SampleDBusObject" will be
1056
reachable via two interfaces: "org.example.Interface" and
1057
"net.example.AlternateInterface", the latter of which will have
1058
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1059
"true", unless "deprecate" is passed with a False value.
1061
This works for methods and signals, and also for D-Bus properties
1062
(from DBusObjectWithProperties) and interfaces (from the
1063
dbus_interface_annotations decorator).
899
def __new__(mcs, name, bases, attr):
900
# Go through all the base classes which could have D-Bus
901
# methods, signals, or properties in them
902
for base in (b for b in bases
903
if issubclass(b, dbus.service.Object)):
904
# Go though all attributes of the base class
905
for attrname, attribute in inspect.getmembers(base):
1066
for orig_interface_name, alt_interface_name in (
1067
alt_interface_names.items()):
1069
interface_names = set()
1070
# Go though all attributes of the class
1071
for attrname, attribute in inspect.getmembers(cls):
906
1072
# Ignore non-D-Bus attributes, and D-Bus attributes
907
1073
# with the wrong interface name
908
1074
if (not hasattr(attribute, "_dbus_interface")
909
1075
or not attribute._dbus_interface
910
.startswith("se.recompile.Mandos")):
1076
.startswith(orig_interface_name)):
912
1078
# Create an alternate D-Bus interface name based on
913
1079
# the current name
914
1080
alt_interface = (attribute._dbus_interface
915
.replace("se.recompile.Mandos",
916
"se.bsnet.fukt.Mandos"))
1081
.replace(orig_interface_name,
1082
alt_interface_name))
1083
interface_names.add(alt_interface)
917
1084
# Is this a D-Bus signal?
918
1085
if getattr(attribute, "_dbus_is_signal", False):
919
# Extract the original non-method function by
1086
# Extract the original non-method undecorated
1087
# function by black magic
921
1088
nonmethod_func = (dict(
922
1089
zip(attribute.func_code.co_freevars,
923
1090
attribute.__closure__))["func"]
986
1165
attribute.func_name,
987
1166
attribute.func_defaults,
988
1167
attribute.func_closure)))
989
return type.__new__(mcs, name, bases, attr)
1168
# Copy annotations, if any
1170
attr[attrname]._dbus_annotations = (
1171
dict(attribute._dbus_annotations))
1172
except AttributeError:
1174
# Is this a D-Bus interface?
1175
elif getattr(attribute, "_dbus_is_interface", False):
1176
# Create a new, but exactly alike, function
1177
# object. Decorate it to be a new D-Bus interface
1178
# with the alternate D-Bus interface name. Add it
1180
attr[attrname] = (dbus_interface_annotations
1183
(attribute.func_code,
1184
attribute.func_globals,
1185
attribute.func_name,
1186
attribute.func_defaults,
1187
attribute.func_closure)))
1189
# Deprecate all alternate interfaces
1190
iname="_AlternateDBusNames_interface_annotation{}"
1191
for interface_name in interface_names:
1192
@dbus_interface_annotations(interface_name)
1194
return { "org.freedesktop.DBus.Deprecated":
1196
# Find an unused name
1197
for aname in (iname.format(i)
1198
for i in itertools.count()):
1199
if aname not in attr:
1203
# Replace the class with a new subclass of it with
1204
# methods, signals, etc. as created above.
1205
cls = type(b"{}Alternate".format(cls.__name__),
1211
@alternate_dbus_interfaces({"se.recompile.Mandos":
1212
"se.bsnet.fukt.Mandos"})
992
1213
class ClientDBus(Client, DBusObjectWithProperties):
993
1214
"""A Client class using D-Bus
1058
1276
checker is not None)
1059
1277
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1060
1278
"LastCheckedOK")
1279
last_checker_status = notifychangeproperty(dbus.Int16,
1280
"LastCheckerStatus")
1061
1281
last_approval_request = notifychangeproperty(
1062
1282
datetime_to_dbus, "LastApprovalRequest")
1063
1283
approved_by_default = notifychangeproperty(dbus.Boolean,
1064
1284
"ApprovedByDefault")
1065
approval_delay = notifychangeproperty(dbus.UInt16,
1285
approval_delay = notifychangeproperty(dbus.UInt64,
1066
1286
"ApprovalDelay",
1068
_timedelta_to_milliseconds)
1288
lambda td: td.total_seconds()
1069
1290
approval_duration = notifychangeproperty(
1070
dbus.UInt16, "ApprovalDuration",
1071
type_func = _timedelta_to_milliseconds)
1291
dbus.UInt64, "ApprovalDuration",
1292
type_func = lambda td: td.total_seconds() * 1000)
1072
1293
host = notifychangeproperty(dbus.String, "Host")
1073
timeout = notifychangeproperty(dbus.UInt16, "Timeout",
1075
_timedelta_to_milliseconds)
1294
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1295
type_func = lambda td:
1296
td.total_seconds() * 1000)
1076
1297
extended_timeout = notifychangeproperty(
1077
dbus.UInt16, "ExtendedTimeout",
1078
type_func = _timedelta_to_milliseconds)
1079
interval = notifychangeproperty(dbus.UInt16,
1298
dbus.UInt64, "ExtendedTimeout",
1299
type_func = lambda td: td.total_seconds() * 1000)
1300
interval = notifychangeproperty(dbus.UInt64,
1082
_timedelta_to_milliseconds)
1303
lambda td: td.total_seconds()
1083
1305
checker_command = notifychangeproperty(dbus.String, "Checker")
1085
1307
del notifychangeproperty
1320
1542
access="readwrite")
1321
1543
def Timeout_dbus_property(self, value=None):
1322
1544
if value is None: # get
1323
return dbus.UInt64(self.timeout_milliseconds())
1545
return dbus.UInt64(self.timeout.total_seconds() * 1000)
1546
old_timeout = self.timeout
1324
1547
self.timeout = datetime.timedelta(0, 0, 0, value)
1325
if getattr(self, "disable_initiator_tag", None) is None:
1327
# Reschedule timeout
1328
gobject.source_remove(self.disable_initiator_tag)
1329
self.disable_initiator_tag = None
1331
time_to_die = _timedelta_to_milliseconds((self
1336
if time_to_die <= 0:
1337
# The timeout has passed
1340
self.expires = (datetime.datetime.utcnow()
1341
+ datetime.timedelta(milliseconds =
1343
self.disable_initiator_tag = (gobject.timeout_add
1344
(time_to_die, self.disable))
1548
# Reschedule disabling
1550
now = datetime.datetime.utcnow()
1551
self.expires += self.timeout - old_timeout
1552
if self.expires <= now:
1553
# The timeout has passed
1556
if (getattr(self, "disable_initiator_tag", None)
1559
gobject.source_remove(self.disable_initiator_tag)
1560
self.disable_initiator_tag = (
1561
gobject.timeout_add(
1562
int((self.expires - now).total_seconds()
1563
* 1000), self.disable))
1346
1565
# ExtendedTimeout - property
1347
1566
@dbus_service_property(_interface, signature="t",
1348
1567
access="readwrite")
1349
1568
def ExtendedTimeout_dbus_property(self, value=None):
1350
1569
if value is None: # get
1351
return dbus.UInt64(self.extended_timeout_milliseconds())
1570
return dbus.UInt64(self.extended_timeout.total_seconds()
1352
1572
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1354
1574
# Interval - property
1698
1911
use_ipv6: Boolean; to use IPv6 or not
1700
1913
def __init__(self, server_address, RequestHandlerClass,
1701
interface=None, use_ipv6=True):
1914
interface=None, use_ipv6=True, socketfd=None):
1915
"""If socketfd is set, use that file descriptor instead of
1916
creating a new one with socket.socket().
1702
1918
self.interface = interface
1704
1920
self.address_family = socket.AF_INET6
1921
if socketfd is not None:
1922
# Save the file descriptor
1923
self.socketfd = socketfd
1924
# Save the original socket.socket() function
1925
self.socket_socket = socket.socket
1926
# To implement --socket, we monkey patch socket.socket.
1928
# (When socketserver.TCPServer is a new-style class, we
1929
# could make self.socket into a property instead of monkey
1930
# patching socket.socket.)
1932
# Create a one-time-only replacement for socket.socket()
1933
@functools.wraps(socket.socket)
1934
def socket_wrapper(*args, **kwargs):
1935
# Restore original function so subsequent calls are
1937
socket.socket = self.socket_socket
1938
del self.socket_socket
1939
# This time only, return a new socket object from the
1940
# saved file descriptor.
1941
return socket.fromfd(self.socketfd, *args, **kwargs)
1942
# Replace socket.socket() function with wrapper
1943
socket.socket = socket_wrapper
1944
# The socketserver.TCPServer.__init__ will call
1945
# socket.socket(), which might be our replacement,
1946
# socket_wrapper(), if socketfd was set.
1705
1947
socketserver.TCPServer.__init__(self, server_address,
1706
1948
RequestHandlerClass)
1707
1950
def server_bind(self):
1708
1951
"""This overrides the normal server_bind() function
1709
1952
to bind to an interface if one was specified, and also NOT to
2105
def rfc3339_duration_to_delta(duration):
2106
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2108
>>> rfc3339_duration_to_delta("P7D")
2109
datetime.timedelta(7)
2110
>>> rfc3339_duration_to_delta("PT60S")
2111
datetime.timedelta(0, 60)
2112
>>> rfc3339_duration_to_delta("PT60M")
2113
datetime.timedelta(0, 3600)
2114
>>> rfc3339_duration_to_delta("PT24H")
2115
datetime.timedelta(1)
2116
>>> rfc3339_duration_to_delta("P1W")
2117
datetime.timedelta(7)
2118
>>> rfc3339_duration_to_delta("PT5M30S")
2119
datetime.timedelta(0, 330)
2120
>>> rfc3339_duration_to_delta("P1DT3M20S")
2121
datetime.timedelta(1, 200)
2124
# Parsing an RFC 3339 duration with regular expressions is not
2125
# possible - there would have to be multiple places for the same
2126
# values, like seconds. The current code, while more esoteric, is
2127
# cleaner without depending on a parsing library. If Python had a
2128
# built-in library for parsing we would use it, but we'd like to
2129
# avoid excessive use of external libraries.
2131
# New type for defining tokens, syntax, and semantics all-in-one
2132
Token = collections.namedtuple("Token",
2133
("regexp", # To match token; if
2134
# "value" is not None,
2135
# must have a "group"
2137
"value", # datetime.timedelta or
2139
"followers")) # Tokens valid after
2141
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2142
# the "duration" ABNF definition in RFC 3339, Appendix A.
2143
token_end = Token(re.compile(r"$"), None, frozenset())
2144
token_second = Token(re.compile(r"(\d+)S"),
2145
datetime.timedelta(seconds=1),
2146
frozenset((token_end,)))
2147
token_minute = Token(re.compile(r"(\d+)M"),
2148
datetime.timedelta(minutes=1),
2149
frozenset((token_second, token_end)))
2150
token_hour = Token(re.compile(r"(\d+)H"),
2151
datetime.timedelta(hours=1),
2152
frozenset((token_minute, token_end)))
2153
token_time = Token(re.compile(r"T"),
2155
frozenset((token_hour, token_minute,
2157
token_day = Token(re.compile(r"(\d+)D"),
2158
datetime.timedelta(days=1),
2159
frozenset((token_time, token_end)))
2160
token_month = Token(re.compile(r"(\d+)M"),
2161
datetime.timedelta(weeks=4),
2162
frozenset((token_day, token_end)))
2163
token_year = Token(re.compile(r"(\d+)Y"),
2164
datetime.timedelta(weeks=52),
2165
frozenset((token_month, token_end)))
2166
token_week = Token(re.compile(r"(\d+)W"),
2167
datetime.timedelta(weeks=1),
2168
frozenset((token_end,)))
2169
token_duration = Token(re.compile(r"P"), None,
2170
frozenset((token_year, token_month,
2171
token_day, token_time,
2173
# Define starting values
2174
value = datetime.timedelta() # Value so far
2176
followers = frozenset((token_duration,)) # Following valid tokens
2177
s = duration # String left to parse
2178
# Loop until end token is found
2179
while found_token is not token_end:
2180
# Search for any currently valid tokens
2181
for token in followers:
2182
match = token.regexp.match(s)
2183
if match is not None:
2185
if token.value is not None:
2186
# Value found, parse digits
2187
factor = int(match.group(1), 10)
2188
# Add to value so far
2189
value += factor * token.value
2190
# Strip token from string
2191
s = token.regexp.sub("", s, 1)
2194
# Set valid next tokens
2195
followers = found_token.followers
2198
# No currently valid tokens were found
2199
raise ValueError("Invalid RFC 3339 duration")
1874
2204
def string_to_delta(interval):
1875
2205
"""Parse a string and return a datetime.timedelta
1968
2304
parser.add_argument("--no-dbus", action="store_false",
1969
2305
dest="use_dbus", help="Do not provide D-Bus"
1970
" system bus interface")
2306
" system bus interface", default=None)
1971
2307
parser.add_argument("--no-ipv6", action="store_false",
1972
dest="use_ipv6", help="Do not use IPv6")
2308
dest="use_ipv6", help="Do not use IPv6",
1973
2310
parser.add_argument("--no-restore", action="store_false",
1974
2311
dest="restore", help="Do not restore stored"
2312
" state", default=None)
2313
parser.add_argument("--socket", type=int,
2314
help="Specify a file descriptor to a network"
2315
" socket to use instead of creating one")
1976
2316
parser.add_argument("--statedir", metavar="DIR",
1977
2317
help="Directory to save/restore state in")
2318
parser.add_argument("--foreground", action="store_true",
2319
help="Run in foreground", default=None)
2320
parser.add_argument("--no-zeroconf", action="store_false",
2321
dest="zeroconf", help="Do not use Zeroconf",
1979
2324
options = parser.parse_args()
1981
2326
if options.check:
2328
fail_count, test_count = doctest.testmod()
2329
sys.exit(os.EX_OK if fail_count == 0 else 1)
1986
2331
# Default values for config file for server-global settings
1987
2332
server_defaults = { "interface": "",
2039
2409
use_ipv6 = server_settings["use_ipv6"]
2040
2410
stored_state_path = os.path.join(server_settings["statedir"],
2041
2411
stored_state_file)
2412
foreground = server_settings["foreground"]
2413
zeroconf = server_settings["zeroconf"]
2044
initlogger(logging.DEBUG)
2416
initlogger(debug, logging.DEBUG)
2046
2418
if not debuglevel:
2049
2421
level = getattr(logging, debuglevel.upper())
2422
initlogger(debug, level)
2052
2424
if server_settings["servicename"] != "Mandos":
2053
2425
syslogger.setFormatter(logging.Formatter
2054
('Mandos (%s) [%%(process)d]:'
2055
' %%(levelname)s: %%(message)s'
2056
% server_settings["servicename"]))
2426
('Mandos ({}) [%(process)d]:'
2427
' %(levelname)s: %(message)s'
2428
.format(server_settings
2058
2431
# Parse config file with clients
2059
client_defaults = { "timeout": "5m",
2060
"extended_timeout": "15m",
2062
"checker": "fping -q -- %%(host)s",
2064
"approval_delay": "0s",
2065
"approval_duration": "1s",
2067
client_config = configparser.SafeConfigParser(client_defaults)
2432
client_config = configparser.SafeConfigParser(Client
2068
2434
client_config.read(os.path.join(server_settings["configdir"],
2069
2435
"clients.conf"))
2071
2437
global mandos_dbus_service
2072
2438
mandos_dbus_service = None
2441
if server_settings["socket"] != "":
2442
socketfd = server_settings["socket"]
2074
2443
tcp_server = MandosServer((server_settings["address"],
2075
2444
server_settings["port"]),
2150
2521
("se.bsnet.fukt.Mandos", bus,
2151
2522
do_not_queue=True))
2152
2523
except dbus.exceptions.NameExistsException as e:
2153
logger.error(unicode(e) + ", disabling D-Bus")
2524
logger.error("Disabling D-Bus:", exc_info=e)
2154
2525
use_dbus = False
2155
2526
server_settings["use_dbus"] = False
2156
2527
tcp_server.use_dbus = False
2157
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2158
service = AvahiServiceToSyslog(name =
2159
server_settings["servicename"],
2160
servicetype = "_mandos._tcp",
2161
protocol = protocol, bus = bus)
2162
if server_settings["interface"]:
2163
service.interface = (if_nametoindex
2164
(str(server_settings["interface"])))
2529
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2530
service = AvahiServiceToSyslog(name =
2531
server_settings["servicename"],
2532
servicetype = "_mandos._tcp",
2533
protocol = protocol, bus = bus)
2534
if server_settings["interface"]:
2535
service.interface = (if_nametoindex
2536
(str(server_settings["interface"])))
2166
2538
global multiprocessing_manager
2167
2539
multiprocessing_manager = multiprocessing.Manager()
2169
2541
client_class = Client
2171
client_class = functools.partial(ClientDBusTransitional,
2174
special_settings = {
2175
# Some settings need to be accessd by special methods;
2176
# booleans need .getboolean(), etc. Here is a list of them:
2177
"approved_by_default":
2179
client_config.getboolean(section, "approved_by_default"),
2181
# Construct a new dict of client settings of this form:
2182
# { client_name: {setting_name: value, ...}, ...}
2183
# with exceptions for any special settings as defined above
2184
client_settings = dict((clientname,
2187
if setting not in special_settings
2188
else special_settings[setting]
2190
for setting, value in
2191
client_config.items(clientname)))
2192
for clientname in client_config.sections())
2543
client_class = functools.partial(ClientDBus, bus = bus)
2545
client_settings = Client.config_parser(client_config)
2194
2546
old_client_settings = {}
2549
# This is used to redirect stdout and stderr for checker processes
2551
wnull = open(os.devnull, "w") # A writable /dev/null
2552
# Only used if server is running in foreground but not in debug
2554
if debug or not foreground:
2197
2557
# Get client data and settings from last running state.
2198
2558
if server_settings["restore"]:
2224
2592
if (name != "secret" and
2225
2593
value != old_client_settings[client_name]
2227
setattr(client, name, value)
2595
client[name] = value
2228
2596
except KeyError:
2231
2599
# Clients who has passed its expire date can still be
2232
# enabled if its last checker was sucessful. Clients
2233
# whose checker failed before we stored its state is
2234
# assumed to have failed all checkers during downtime.
2235
if client["enabled"] and client["last_checked_ok"]:
2236
if ((datetime.datetime.utcnow()
2237
- client["last_checked_ok"])
2238
> client["interval"]):
2239
if client["last_checker_status"] != 0:
2600
# enabled if its last checker was successful. Clients
2601
# whose checker succeeded before we stored its state is
2602
# assumed to have successfully run all checkers during
2604
if client["enabled"]:
2605
if datetime.datetime.utcnow() >= client["expires"]:
2606
if not client["last_checked_ok"]:
2608
"disabling client {} - Client never "
2609
"performed a successful checker"
2610
.format(client_name))
2611
client["enabled"] = False
2612
elif client["last_checker_status"] != 0:
2614
"disabling client {} - Client last"
2615
" checker failed with error code {}"
2616
.format(client_name,
2617
client["last_checker_status"]))
2240
2618
client["enabled"] = False
2242
2620
client["expires"] = (datetime.datetime
2244
2622
+ client["timeout"])
2246
client["changedstate"] = (multiprocessing_manager
2248
(multiprocessing_manager
2251
new_client = (ClientDBusTransitional.__new__
2252
(ClientDBusTransitional))
2253
tcp_server.clients[client_name] = new_client
2254
new_client.bus = bus
2255
for name, value in client.iteritems():
2256
setattr(new_client, name, value)
2257
client_object_name = unicode(client_name).translate(
2258
{ord("."): ord("_"),
2259
ord("-"): ord("_")})
2260
new_client.dbus_object_path = (dbus.ObjectPath
2262
+ client_object_name))
2263
DBusObjectWithProperties.__init__(new_client,
2268
tcp_server.clients[client_name] = (Client.__new__
2270
for name, value in client.iteritems():
2271
setattr(tcp_server.clients[client_name],
2623
logger.debug("Last checker succeeded,"
2624
" keeping {} enabled"
2625
.format(client_name))
2275
tcp_server.clients[client_name].secret = (
2276
crypt.decrypt(tcp_server.clients[client_name]
2278
client_settings[client_name]
2627
client["secret"] = (
2628
pgp.decrypt(client["encrypted_secret"],
2629
client_settings[client_name]
2281
2632
# If decryption fails, we use secret from new settings
2282
tcp_server.clients[client_name].secret = (
2633
logger.debug("Failed to decrypt {} old secret"
2634
.format(client_name))
2635
client["secret"] = (
2283
2636
client_settings[client_name]["secret"])
2285
# Create/remove clients based on new changes made to config
2286
for clientname in set(old_client_settings) - set(client_settings):
2287
del tcp_server.clients[clientname]
2288
for clientname in set(client_settings) - set(old_client_settings):
2289
tcp_server.clients[clientname] = (client_class(name
2638
# Add/remove clients based on new changes made to config
2639
for client_name in (set(old_client_settings)
2640
- set(client_settings)):
2641
del clients_data[client_name]
2642
for client_name in (set(client_settings)
2643
- set(old_client_settings)):
2644
clients_data[client_name] = client_settings[client_name]
2646
# Create all client objects
2647
for client_name, client in clients_data.items():
2648
tcp_server.clients[client_name] = client_class(
2649
name = client_name, settings = client,
2650
server_settings = server_settings)
2295
2652
if not tcp_server.clients:
2296
2653
logger.warning("No clients defined")
2302
pidfile.write(str(pid) + "\n".encode("utf-8"))
2305
logger.error("Could not write to file %r with PID %d",
2308
# "pidfile" was never created
2656
if pidfile is not None:
2660
pidfile.write(str(pid) + "\n".encode("utf-8"))
2662
logger.error("Could not write to file %r with PID %d",
2310
2665
del pidfilename
2312
signal.signal(signal.SIGINT, signal.SIG_IGN)
2314
2667
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2315
2668
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2318
class MandosDBusService(dbus.service.Object):
2671
@alternate_dbus_interfaces({"se.recompile.Mandos":
2672
"se.bsnet.fukt.Mandos"})
2673
class MandosDBusService(DBusObjectWithProperties):
2319
2674
"""A D-Bus proxy object"""
2320
2675
def __init__(self):
2321
2676
dbus.service.Object.__init__(self, bus, "/")
2322
2677
_interface = "se.recompile.Mandos"
2679
@dbus_interface_annotations(_interface)
2681
return { "org.freedesktop.DBus.Property"
2682
".EmitsChangedSignal":
2324
2685
@dbus.service.signal(_interface, signature="o")
2325
2686
def ClientAdded(self, objpath):
2404
2766
if attr not in exclude:
2405
2767
client_dict[attr] = getattr(client, attr)
2407
clients.append(client_dict)
2769
clients[client.name] = client_dict
2408
2770
del client_settings[client.name]["secret"]
2411
with os.fdopen(os.open(stored_state_path,
2412
os.O_CREAT|os.O_WRONLY|os.O_TRUNC,
2413
0600), "wb") as stored_state:
2773
with (tempfile.NamedTemporaryFile
2774
(mode='wb', suffix=".pickle", prefix='clients-',
2775
dir=os.path.dirname(stored_state_path),
2776
delete=False)) as stored_state:
2414
2777
pickle.dump((clients, client_settings), stored_state)
2778
tempname=stored_state.name
2779
os.rename(tempname, stored_state_path)
2415
2780
except (IOError, OSError) as e:
2416
logger.warning("Could not save persistent state: {0}"
2418
if e.errno not in (errno.ENOENT, errno.EACCES):
2786
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
2787
logger.warning("Could not save persistent state: {}"
2788
.format(os.strerror(e.errno)))
2790
logger.warning("Could not save persistent state:",
2421
2794
# Delete all clients, and settings from config
2446
2819
tcp_server.server_activate()
2448
2821
# Find out what port we got
2449
service.port = tcp_server.socket.getsockname()[1]
2823
service.port = tcp_server.socket.getsockname()[1]
2451
2825
logger.info("Now listening on address %r, port %d,"
2452
" flowinfo %d, scope_id %d"
2453
% tcp_server.socket.getsockname())
2826
" flowinfo %d, scope_id %d",
2827
*tcp_server.socket.getsockname())
2455
logger.info("Now listening on address %r, port %d"
2456
% tcp_server.socket.getsockname())
2829
logger.info("Now listening on address %r, port %d",
2830
*tcp_server.socket.getsockname())
2458
2832
#service.interface = tcp_server.socket.getsockname()[3]
2461
# From the Avahi example code
2464
except dbus.exceptions.DBusException as error:
2465
logger.critical("DBusException: %s", error)
2468
# End of Avahi example code
2836
# From the Avahi example code
2839
except dbus.exceptions.DBusException as error:
2840
logger.critical("D-Bus Exception", exc_info=error)
2843
# End of Avahi example code
2470
2845
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2471
2846
lambda *args, **kwargs: