88
82
except ImportError:
89
83
SO_BINDTODEVICE = None
92
stored_state_file = "clients.pickle"
94
logger = logging.getLogger()
98
if_nametoindex = (ctypes.cdll.LoadLibrary
99
(ctypes.util.find_library("c"))
101
except (OSError, AttributeError):
102
def if_nametoindex(interface):
103
"Get an interface index the hard way, i.e. using fcntl()"
104
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
105
with contextlib.closing(socket.socket()) as s:
106
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
107
struct.pack(str("16s16x"),
109
interface_index = struct.unpack(str("I"),
111
return interface_index
114
def initlogger(debug, level=logging.WARNING):
115
"""init logger and add loglevel"""
118
syslogger = (logging.handlers.SysLogHandler
120
logging.handlers.SysLogHandler.LOG_DAEMON,
121
address = str("/dev/log")))
122
syslogger.setFormatter(logging.Formatter
123
('Mandos [%(process)d]: %(levelname)s:'
125
logger.addHandler(syslogger)
128
console = logging.StreamHandler()
129
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
133
logger.addHandler(console)
134
logger.setLevel(level)
137
class PGPError(Exception):
138
"""Exception if encryption/decryption fails"""
142
class PGPEngine(object):
143
"""A simple class for OpenPGP symmetric encryption & decryption"""
145
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
146
self.gnupgargs = ['--batch',
147
'--home', self.tempdir,
155
def __exit__(self, exc_type, exc_value, traceback):
163
if self.tempdir is not None:
164
# Delete contents of tempdir
165
for root, dirs, files in os.walk(self.tempdir,
167
for filename in files:
168
os.remove(os.path.join(root, filename))
170
os.rmdir(os.path.join(root, dirname))
172
os.rmdir(self.tempdir)
175
def password_encode(self, password):
176
# Passphrase can not be empty and can not contain newlines or
177
# NUL bytes. So we prefix it and hex encode it.
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"))
186
def encrypt(self, data, password):
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:
204
def decrypt(self, data, password):
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:
221
return decrypted_plaintext
88
#logger = logging.getLogger('mandos')
89
logger = logging.Logger('mandos')
90
syslogger = (logging.handlers.SysLogHandler
91
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
92
address = str("/dev/log")))
93
syslogger.setFormatter(logging.Formatter
94
('Mandos [%(process)d]: %(levelname)s:'
96
logger.addHandler(syslogger)
98
console = logging.StreamHandler()
99
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
102
logger.addHandler(console)
224
104
class AvahiError(Exception):
225
105
def __init__(self, value, *args, **kwargs):
436
298
interval: datetime.timedelta(); How often to start a new checker
437
299
last_approval_request: datetime.datetime(); (UTC) or None
438
300
last_checked_ok: datetime.datetime(); (UTC) or None
439
last_checker_status: integer between 0 and 255 reflecting exit
440
status of last checker. -1 reflects crashed
441
checker, -2 means no checker completed yet.
442
last_enabled: datetime.datetime(); (UTC) or None
301
last_enabled: datetime.datetime(); (UTC)
443
302
name: string; from the config file, used in log messages and
444
303
D-Bus identifiers
445
304
secret: bytestring; sent verbatim (over TLS) to client
446
305
timeout: datetime.timedelta(); How long from last_checked_ok
447
306
until this client is disabled
448
extended_timeout: extra long timeout when secret has been sent
307
extended_timeout: extra long timeout when password has been sent
449
308
runtime_expansions: Allowed attributes for runtime expansion.
450
309
expires: datetime.datetime(); time (UTC) when a client will be
451
310
disabled, or None
452
server_settings: The server_settings dict from main()
455
313
runtime_expansions = ("approval_delay", "approval_duration",
456
"created", "enabled", "expires",
457
"fingerprint", "host", "interval",
458
"last_approval_request", "last_checked_ok",
314
"created", "enabled", "fingerprint",
315
"host", "interval", "last_checked_ok",
459
316
"last_enabled", "name", "timeout")
460
client_defaults = { "timeout": "PT5M",
461
"extended_timeout": "PT15M",
463
"checker": "fping -q -- %%(host)s",
465
"approval_delay": "PT0S",
466
"approval_duration": "PT1S",
467
"approved_by_default": "True",
471
318
def timeout_milliseconds(self):
472
319
"Return the 'timeout' attribute in milliseconds"
473
return timedelta_to_milliseconds(self.timeout)
320
return _timedelta_to_milliseconds(self.timeout)
475
322
def extended_timeout_milliseconds(self):
476
323
"Return the 'extended_timeout' attribute in milliseconds"
477
return timedelta_to_milliseconds(self.extended_timeout)
324
return _timedelta_to_milliseconds(self.extended_timeout)
479
326
def interval_milliseconds(self):
480
327
"Return the 'interval' attribute in milliseconds"
481
return timedelta_to_milliseconds(self.interval)
328
return _timedelta_to_milliseconds(self.interval)
483
330
def approval_delay_milliseconds(self):
484
return timedelta_to_milliseconds(self.approval_delay)
487
def config_parser(config):
488
"""Construct a new dict of client settings of this form:
489
{ client_name: {setting_name: value, ...}, ...}
490
with exceptions for any special settings as defined above.
491
NOTE: Must be a pure function. Must return the same result
492
value given the same arguments.
495
for client_name in config.sections():
496
section = dict(config.items(client_name))
497
client = settings[client_name] = {}
499
client["host"] = section["host"]
500
# Reformat values from string types to Python types
501
client["approved_by_default"] = config.getboolean(
502
client_name, "approved_by_default")
503
client["enabled"] = config.getboolean(client_name,
506
client["fingerprint"] = (section["fingerprint"].upper()
508
if "secret" in section:
509
client["secret"] = section["secret"].decode("base64")
510
elif "secfile" in section:
511
with open(os.path.expanduser(os.path.expandvars
512
(section["secfile"])),
514
client["secret"] = secfile.read()
516
raise TypeError("No secret or secfile for section {0}"
518
client["timeout"] = string_to_delta(section["timeout"])
519
client["extended_timeout"] = string_to_delta(
520
section["extended_timeout"])
521
client["interval"] = string_to_delta(section["interval"])
522
client["approval_delay"] = string_to_delta(
523
section["approval_delay"])
524
client["approval_duration"] = string_to_delta(
525
section["approval_duration"])
526
client["checker_command"] = section["checker"]
527
client["last_approval_request"] = None
528
client["last_checked_ok"] = None
529
client["last_checker_status"] = -2
533
def __init__(self, settings, name = None, server_settings=None):
331
return _timedelta_to_milliseconds(self.approval_delay)
333
def __init__(self, name = None, disable_hook=None, config=None):
334
"""Note: the 'checker' key in 'config' sets the
335
'checker_command' attribute and *not* the 'checker'
535
if server_settings is None:
537
self.server_settings = server_settings
538
# adding all client settings
539
for setting, value in settings.iteritems():
540
setattr(self, setting, value)
543
if not hasattr(self, "last_enabled"):
544
self.last_enabled = datetime.datetime.utcnow()
545
if not hasattr(self, "expires"):
546
self.expires = (datetime.datetime.utcnow()
549
self.last_enabled = None
552
340
logger.debug("Creating client %r", self.name)
553
341
# Uppercase and remove spaces from fingerprint for later
554
342
# comparison purposes with return value from the fingerprint()
344
self.fingerprint = (config["fingerprint"].upper()
556
346
logger.debug(" Fingerprint: %s", self.fingerprint)
557
self.created = settings.get("created",
558
datetime.datetime.utcnow())
560
# attributes specific for this server instance
347
if "secret" in config:
348
self.secret = config["secret"].decode("base64")
349
elif "secfile" in config:
350
with open(os.path.expanduser(os.path.expandvars
351
(config["secfile"])),
353
self.secret = secfile.read()
355
raise TypeError("No secret or secfile for client %s"
357
self.host = config.get("host", "")
358
self.created = datetime.datetime.utcnow()
360
self.last_approval_request = None
361
self.last_enabled = None
362
self.last_checked_ok = None
363
self.timeout = string_to_delta(config["timeout"])
364
self.extended_timeout = string_to_delta(config["extended_timeout"])
365
self.interval = string_to_delta(config["interval"])
366
self.disable_hook = disable_hook
561
367
self.checker = None
562
368
self.checker_initiator_tag = None
563
369
self.disable_initiator_tag = None
564
371
self.checker_callback_tag = None
372
self.checker_command = config["checker"]
565
373
self.current_checker_command = None
374
self.last_connect = None
375
self._approved = None
376
self.approved_by_default = config.get("approved_by_default",
567
378
self.approvals_pending = 0
568
self.changedstate = (multiprocessing_manager
569
.Condition(multiprocessing_manager
571
self.client_structure = [attr for attr in
572
self.__dict__.iterkeys()
573
if not attr.startswith("_")]
574
self.client_structure.append("client_structure")
576
for name, t in inspect.getmembers(type(self),
580
if not name.startswith("_"):
581
self.client_structure.append(name)
379
self.approval_delay = string_to_delta(
380
config["approval_delay"])
381
self.approval_duration = string_to_delta(
382
config["approval_duration"])
383
self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())
583
# Send notice to process children that client state has changed
584
385
def send_changedstate(self):
585
with self.changedstate:
586
self.changedstate.notify_all()
386
self.changedstate.acquire()
387
self.changedstate.notify_all()
388
self.changedstate.release()
588
390
def enable(self):
589
391
"""Start this client's checker and timeout hooks"""
590
392
if getattr(self, "enabled", False):
591
393
# Already enabled
395
self.send_changedstate()
396
# Schedule a new checker to be started an 'interval' from now,
397
# and every interval from then on.
398
self.checker_initiator_tag = (gobject.timeout_add
399
(self.interval_milliseconds(),
401
# Schedule a disable() when 'timeout' has passed
593
402
self.expires = datetime.datetime.utcnow() + self.timeout
403
self.disable_initiator_tag = (gobject.timeout_add
404
(self.timeout_milliseconds(),
594
406
self.enabled = True
595
407
self.last_enabled = datetime.datetime.utcnow()
597
self.send_changedstate()
408
# Also start a new checker *right now*.
599
411
def disable(self, quiet=True):
600
412
"""Disable this client."""
601
413
if not getattr(self, "enabled", False):
416
self.send_changedstate()
604
418
logger.info("Disabling client %s", self.name)
605
if getattr(self, "disable_initiator_tag", None) is not None:
419
if getattr(self, "disable_initiator_tag", False):
606
420
gobject.source_remove(self.disable_initiator_tag)
607
421
self.disable_initiator_tag = None
608
422
self.expires = None
609
if getattr(self, "checker_initiator_tag", None) is not None:
423
if getattr(self, "checker_initiator_tag", False):
610
424
gobject.source_remove(self.checker_initiator_tag)
611
425
self.checker_initiator_tag = None
612
426
self.stop_checker()
427
if self.disable_hook:
428
self.disable_hook(self)
613
429
self.enabled = False
615
self.send_changedstate()
616
430
# Do not run this again if called by a gobject.timeout_add
619
433
def __del__(self):
434
self.disable_hook = None
622
def init_checker(self):
623
# Schedule a new checker to be started an 'interval' from now,
624
# and every interval from then on.
625
if self.checker_initiator_tag is not None:
626
gobject.source_remove(self.checker_initiator_tag)
627
self.checker_initiator_tag = (gobject.timeout_add
628
(self.interval_milliseconds(),
630
# Schedule a disable() when 'timeout' has passed
631
if self.disable_initiator_tag is not None:
632
gobject.source_remove(self.disable_initiator_tag)
633
self.disable_initiator_tag = (gobject.timeout_add
634
(self.timeout_milliseconds(),
636
# Also start a new checker *right now*.
639
437
def checker_callback(self, pid, condition, command):
640
438
"""The checker has completed, so take appropriate actions."""
641
439
self.checker_callback_tag = None
642
440
self.checker = None
643
441
if os.WIFEXITED(condition):
644
self.last_checker_status = os.WEXITSTATUS(condition)
645
if self.last_checker_status == 0:
442
exitstatus = os.WEXITSTATUS(condition)
646
444
logger.info("Checker for %(name)s succeeded",
648
446
self.checked_ok()
1047
743
except (AttributeError, xml.dom.DOMException,
1048
744
xml.parsers.expat.ExpatError) as error:
1049
745
logger.error("Failed to override Introspection method",
1051
747
return xmlstring
1054
def datetime_to_dbus(dt, variant_level=0):
750
def datetime_to_dbus (dt, variant_level=0):
1055
751
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1057
753
return dbus.String("", variant_level = variant_level)
1058
754
return dbus.String(dt.isoformat(),
1059
755
variant_level=variant_level)
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).
757
class AlternateDBusNamesMetaclass(DBusObjectWithProperties.__metaclass__):
758
"""Applied to an empty subclass of a D-Bus object, this metaclass
759
will add additional D-Bus attributes matching a certain pattern.
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):
761
def __new__(mcs, name, bases, attr):
762
# Go through all the base classes which could have D-Bus
763
# methods, signals, or properties in them
764
for base in (b for b in bases
765
if issubclass(b, dbus.service.Object)):
766
# Go though all attributes of the base class
767
for attrname, attribute in inspect.getmembers(base):
1092
768
# Ignore non-D-Bus attributes, and D-Bus attributes
1093
769
# with the wrong interface name
1094
770
if (not hasattr(attribute, "_dbus_interface")
1095
771
or not attribute._dbus_interface
1096
.startswith(orig_interface_name)):
772
.startswith("se.recompile.Mandos")):
1098
774
# Create an alternate D-Bus interface name based on
1099
775
# the current name
1100
776
alt_interface = (attribute._dbus_interface
1101
.replace(orig_interface_name,
1102
alt_interface_name))
1103
interface_names.add(alt_interface)
777
.replace("se.recompile.Mandos",
778
"se.bsnet.fukt.Mandos"))
1104
779
# Is this a D-Bus signal?
1105
780
if getattr(attribute, "_dbus_is_signal", False):
1106
# Extract the original non-method undecorated
1107
# function by black magic
781
# Extract the original non-method function by
1108
783
nonmethod_func = (dict(
1109
784
zip(attribute.func_code.co_freevars,
1110
785
attribute.__closure__))["func"]
1292
912
last_enabled = notifychangeproperty(datetime_to_dbus,
1294
914
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1295
type_func = lambda checker:
1296
checker is not None)
915
type_func = lambda checker: checker is not None)
1297
916
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1298
917
"LastCheckedOK")
1299
last_checker_status = notifychangeproperty(dbus.Int16,
1300
"LastCheckerStatus")
1301
last_approval_request = notifychangeproperty(
1302
datetime_to_dbus, "LastApprovalRequest")
918
last_approval_request = notifychangeproperty(datetime_to_dbus,
919
"LastApprovalRequest")
1303
920
approved_by_default = notifychangeproperty(dbus.Boolean,
1304
921
"ApprovedByDefault")
1305
approval_delay = notifychangeproperty(dbus.UInt64,
1308
timedelta_to_milliseconds)
1309
approval_duration = notifychangeproperty(
1310
dbus.UInt64, "ApprovalDuration",
1311
type_func = timedelta_to_milliseconds)
922
approval_delay = notifychangeproperty(dbus.UInt16, "ApprovalDelay",
923
type_func = _timedelta_to_milliseconds)
924
approval_duration = notifychangeproperty(dbus.UInt16, "ApprovalDuration",
925
type_func = _timedelta_to_milliseconds)
1312
926
host = notifychangeproperty(dbus.String, "Host")
1313
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1315
timedelta_to_milliseconds)
1316
extended_timeout = notifychangeproperty(
1317
dbus.UInt64, "ExtendedTimeout",
1318
type_func = timedelta_to_milliseconds)
1319
interval = notifychangeproperty(dbus.UInt64,
1322
timedelta_to_milliseconds)
927
timeout = notifychangeproperty(dbus.UInt16, "Timeout",
928
type_func = _timedelta_to_milliseconds)
929
extended_timeout = notifychangeproperty(dbus.UInt16, "ExtendedTimeout",
930
type_func = _timedelta_to_milliseconds)
931
interval = notifychangeproperty(dbus.UInt16, "Interval",
932
type_func = _timedelta_to_milliseconds)
1323
933
checker_command = notifychangeproperty(dbus.String, "Checker")
1325
935
del notifychangeproperty
2027
1597
def __init__(self, server_address, RequestHandlerClass,
2028
1598
interface=None, use_ipv6=True, clients=None,
2029
gnutls_priority=None, use_dbus=True, socketfd=None):
1599
gnutls_priority=None, use_dbus=True):
2030
1600
self.enabled = False
2031
1601
self.clients = clients
2032
1602
if self.clients is None:
1603
self.clients = set()
2034
1604
self.use_dbus = use_dbus
2035
1605
self.gnutls_priority = gnutls_priority
2036
1606
IPv6_TCPServer.__init__(self, server_address,
2037
1607
RequestHandlerClass,
2038
1608
interface = interface,
2039
use_ipv6 = use_ipv6,
2040
socketfd = socketfd)
1609
use_ipv6 = use_ipv6)
2041
1610
def server_activate(self):
2042
1611
if self.enabled:
2043
1612
return socketserver.TCPServer.server_activate(self)
2045
1613
def enable(self):
2046
1614
self.enabled = True
2048
def add_pipe(self, parent_pipe, proc):
1615
def add_pipe(self, parent_pipe):
2049
1616
# Call "handle_ipc" for both data and EOF events
2050
1617
gobject.io_add_watch(parent_pipe.fileno(),
2051
1618
gobject.IO_IN | gobject.IO_HUP,
2052
1619
functools.partial(self.handle_ipc,
1620
parent_pipe = parent_pipe))
2057
1622
def handle_ipc(self, source, condition, parent_pipe=None,
2058
proc = None, client_object=None):
2059
# error, or the other end of multiprocessing.Pipe has closed
2060
if condition & (gobject.IO_ERR | gobject.IO_HUP):
2061
# Wait for other process to exit
1623
client_object=None):
1625
gobject.IO_IN: "IN", # There is data to read.
1626
gobject.IO_OUT: "OUT", # Data can be written (without
1628
gobject.IO_PRI: "PRI", # There is urgent data to read.
1629
gobject.IO_ERR: "ERR", # Error condition.
1630
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1631
# broken, usually for pipes and
1634
conditions_string = ' | '.join(name
1636
condition_names.iteritems()
1637
if cond & condition)
1638
# error or the other end of multiprocessing.Pipe has closed
1639
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
2065
1642
# Read a request from the child
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")
2223
1693
def string_to_delta(interval):
2224
1694
"""Parse a string and return a datetime.timedelta
2405
1862
for option in server_settings.keys():
2406
1863
if type(server_settings[option]) is str:
2407
1864
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
2415
1865
# Now we have our good server settings in "server_settings"
2417
1867
##################################################################
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"
2425
1869
# For convenience
2426
1870
debug = server_settings["debug"]
2427
1871
debuglevel = server_settings["debuglevel"]
2428
1872
use_dbus = server_settings["use_dbus"]
2429
1873
use_ipv6 = server_settings["use_ipv6"]
2430
stored_state_path = os.path.join(server_settings["statedir"],
2432
foreground = server_settings["foreground"]
2433
zeroconf = server_settings["zeroconf"]
2436
initlogger(debug, logging.DEBUG)
2441
level = getattr(logging, debuglevel.upper())
2442
initlogger(debug, level)
2444
1875
if server_settings["servicename"] != "Mandos":
2445
1876
syslogger.setFormatter(logging.Formatter
2446
('Mandos ({0}) [%(process)d]:'
2447
' %(levelname)s: %(message)s'
2448
.format(server_settings
1877
('Mandos (%s) [%%(process)d]:'
1878
' %%(levelname)s: %%(message)s'
1879
% server_settings["servicename"]))
2451
1881
# Parse config file with clients
2452
client_config = configparser.SafeConfigParser(Client
1882
client_defaults = { "timeout": "5m",
1883
"extended_timeout": "15m",
1885
"checker": "fping -q -- %%(host)s",
1887
"approval_delay": "0s",
1888
"approval_duration": "1s",
1890
client_config = configparser.SafeConfigParser(client_defaults)
2454
1891
client_config.read(os.path.join(server_settings["configdir"],
2455
1892
"clients.conf"))
2457
1894
global mandos_dbus_service
2458
1895
mandos_dbus_service = None
2461
if server_settings["socket"] != "":
2462
socketfd = server_settings["socket"]
2463
1897
tcp_server = MandosServer((server_settings["address"],
2464
1898
server_settings["port"]),
2538
1978
bus_name = dbus.service.BusName("se.recompile.Mandos",
2539
1979
bus, do_not_queue=True)
2540
old_bus_name = (dbus.service.BusName
2541
("se.bsnet.fukt.Mandos", bus,
1980
old_bus_name = dbus.service.BusName("se.bsnet.fukt.Mandos",
1981
bus, do_not_queue=True)
2543
1982
except dbus.exceptions.NameExistsException as e:
2544
logger.error("Disabling D-Bus:", exc_info=e)
1983
logger.error(unicode(e) + ", disabling D-Bus")
2545
1984
use_dbus = False
2546
1985
server_settings["use_dbus"] = False
2547
1986
tcp_server.use_dbus = False
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"])))
1987
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1988
service = AvahiService(name = server_settings["servicename"],
1989
servicetype = "_mandos._tcp",
1990
protocol = protocol, bus = bus)
1991
if server_settings["interface"]:
1992
service.interface = (if_nametoindex
1993
(str(server_settings["interface"])))
2558
1995
global multiprocessing_manager
2559
1996
multiprocessing_manager = multiprocessing.Manager()
2561
1998
client_class = Client
2563
client_class = functools.partial(ClientDBus, bus = bus)
2565
client_settings = Client.config_parser(client_config)
2566
old_client_settings = {}
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:
2577
# Get client data and settings from last running state.
2578
if server_settings["restore"]:
2580
with open(stored_state_path, "rb") as stored_state:
2581
clients_data, old_client_settings = (pickle.load
2583
os.remove(stored_state_path)
2584
except IOError as e:
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:",
2592
except EOFError as e:
2593
logger.warning("Could not load persistent state: "
2594
"EOFError:", exc_info=e)
2596
with PGPEngine() as pgp:
2597
for client_name, client in clients_data.iteritems():
2598
# Skip removed clients
2599
if client_name not in client_settings:
2602
# Decide which value to use after restoring saved state.
2603
# We have three different values: Old config file,
2604
# new config file, and saved state.
2605
# New config value takes precedence if it differs from old
2606
# config value, otherwise use saved state.
2607
for name, value in client_settings[client_name].items():
2609
# For each value in new config, check if it
2610
# differs from the old config value (Except for
2611
# the "secret" attribute)
2612
if (name != "secret" and
2613
value != old_client_settings[client_name]
2615
client[name] = value
2619
# Clients who has passed its expire date can still be
2620
# enabled if its last checker was successful. Clients
2621
# whose checker succeeded before we stored its state is
2622
# assumed to have successfully run all checkers during
2624
if client["enabled"]:
2625
if datetime.datetime.utcnow() >= client["expires"]:
2626
if not client["last_checked_ok"]:
2628
"disabling client {0} - Client never "
2629
"performed a successful checker"
2630
.format(client_name))
2631
client["enabled"] = False
2632
elif client["last_checker_status"] != 0:
2634
"disabling client {0} - Client "
2635
"last checker failed with error code {1}"
2636
.format(client_name,
2637
client["last_checker_status"]))
2638
client["enabled"] = False
2640
client["expires"] = (datetime.datetime
2642
+ client["timeout"])
2643
logger.debug("Last checker succeeded,"
2644
" keeping {0} enabled"
2645
.format(client_name))
2000
client_class = functools.partial(ClientDBusTransitional, bus = bus)
2001
def client_config_items(config, section):
2002
special_settings = {
2003
"approved_by_default":
2004
lambda: config.getboolean(section,
2005
"approved_by_default"),
2007
for name, value in config.items(section):
2647
client["secret"] = (
2648
pgp.decrypt(client["encrypted_secret"],
2649
client_settings[client_name]
2652
# If decryption fails, we use secret from new settings
2653
logger.debug("Failed to decrypt {0} old secret"
2654
.format(client_name))
2655
client["secret"] = (
2656
client_settings[client_name]["secret"])
2658
# Add/remove clients based on new changes made to config
2659
for client_name in (set(old_client_settings)
2660
- set(client_settings)):
2661
del clients_data[client_name]
2662
for client_name in (set(client_settings)
2663
- set(old_client_settings)):
2664
clients_data[client_name] = client_settings[client_name]
2666
# Create all client objects
2667
for client_name, client in clients_data.iteritems():
2668
tcp_server.clients[client_name] = client_class(
2669
name = client_name, settings = client,
2670
server_settings = server_settings)
2009
yield (name, special_settings[name]())
2013
tcp_server.clients.update(set(
2014
client_class(name = section,
2015
config= dict(client_config_items(
2016
client_config, section)))
2017
for section in client_config.sections()))
2672
2018
if not tcp_server.clients:
2673
2019
logger.warning("No clients defined")
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",
2025
pidfile.write(str(pid) + "\n".encode("utf-8"))
2028
logger.error("Could not write to file %r with PID %d",
2031
# "pidfile" was never created
2685
2033
del pidfilename
2035
signal.signal(signal.SIGINT, signal.SIG_IGN)
2687
2037
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2688
2038
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2691
@alternate_dbus_interfaces({"se.recompile.Mandos":
2692
"se.bsnet.fukt.Mandos"})
2693
class MandosDBusService(DBusObjectWithProperties):
2041
class MandosDBusService(dbus.service.Object):
2694
2042
"""A D-Bus proxy object"""
2695
2043
def __init__(self):
2696
2044
dbus.service.Object.__init__(self, bus, "/")
2697
2045
_interface = "se.recompile.Mandos"
2699
@dbus_interface_annotations(_interface)
2701
return { "org.freedesktop.DBus.Property"
2702
".EmitsChangedSignal":
2705
2047
@dbus.service.signal(_interface, signature="o")
2706
2048
def ClientAdded(self, objpath):
2752
mandos_dbus_service = MandosDBusService()
2093
class MandosDBusServiceTransitional(MandosDBusService):
2094
__metaclass__ = AlternateDBusNamesMetaclass
2095
mandos_dbus_service = MandosDBusServiceTransitional()
2755
2098
"Cleanup function; run on exit"
2759
multiprocessing.active_children()
2761
if not (tcp_server.clients or client_settings):
2764
# Store client before exiting. Secrets are encrypted with key
2765
# based on what config file has. If config file is
2766
# removed/edited, old secret will thus be unrecovable.
2768
with PGPEngine() as pgp:
2769
for client in tcp_server.clients.itervalues():
2770
key = client_settings[client.name]["secret"]
2771
client.encrypted_secret = pgp.encrypt(client.secret,
2775
# A list of attributes that can not be pickled
2777
exclude = set(("bus", "changedstate", "secret",
2778
"checker", "server_settings"))
2779
for name, typ in (inspect.getmembers
2780
(dbus.service.Object)):
2783
client_dict["encrypted_secret"] = (client
2785
for attr in client.client_structure:
2786
if attr not in exclude:
2787
client_dict[attr] = getattr(client, attr)
2789
clients[client.name] = client_dict
2790
del client_settings[client.name]["secret"]
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:
2797
pickle.dump((clients, client_settings), stored_state)
2798
tempname=stored_state.name
2799
os.rename(tempname, stored_state_path)
2800
except (IOError, OSError) as e:
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:",
2814
# Delete all clients, and settings from config
2815
2101
while tcp_server.clients:
2816
name, client = tcp_server.clients.popitem()
2102
client = tcp_server.clients.pop()
2818
2104
client.remove_from_connection()
2105
client.disable_hook = None
2819
2106
# Don't signal anything except ClientRemoved
2820
2107
client.disable(quiet=True)
2822
2109
# Emit D-Bus signal
2823
mandos_dbus_service.ClientRemoved(client
2110
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
2826
client_settings.clear()
2828
2113
atexit.register(cleanup)
2830
for client in tcp_server.clients.itervalues():
2115
for client in tcp_server.clients:
2832
2117
# Emit D-Bus signal
2833
2118
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2834
# Need to initiate checking of clients
2836
client.init_checker()
2838
2121
tcp_server.enable()
2839
2122
tcp_server.server_activate()
2841
2124
# Find out what port we got
2843
service.port = tcp_server.socket.getsockname()[1]
2125
service.port = tcp_server.socket.getsockname()[1]
2845
2127
logger.info("Now listening on address %r, port %d,"
2846
" flowinfo %d, scope_id %d",
2847
*tcp_server.socket.getsockname())
2128
" flowinfo %d, scope_id %d"
2129
% tcp_server.socket.getsockname())
2849
logger.info("Now listening on address %r, port %d",
2850
*tcp_server.socket.getsockname())
2131
logger.info("Now listening on address %r, port %d"
2132
% tcp_server.socket.getsockname())
2852
2134
#service.interface = tcp_server.socket.getsockname()[3]
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
2137
# From the Avahi example code
2140
except dbus.exceptions.DBusException as error:
2141
logger.critical("DBusException: %s", error)
2144
# End of Avahi example code
2865
2146
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2866
2147
lambda *args, **kwargs: