52
22
from sets import Set
57
import logging.handlers
59
from contextlib import closing
65
28
from dbus.mainloop.glib import DBusGMainLoop
71
logger = logging.Logger('mandos')
72
syslogger = (logging.handlers.SysLogHandler
73
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
74
address = "/dev/log"))
75
syslogger.setFormatter(logging.Formatter
76
('Mandos [%(process)d]: %(levelname)s:'
78
logger.addHandler(syslogger)
80
console = logging.StreamHandler()
81
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
82
' %(levelname)s: %(message)s'))
83
logger.addHandler(console)
85
class AvahiError(Exception):
86
def __init__(self, value, *args, **kwargs):
88
super(AvahiError, self).__init__(value, *args, **kwargs)
89
def __unicode__(self):
90
return unicode(repr(self.value))
92
class AvahiServiceError(AvahiError):
95
class AvahiGroupError(AvahiError):
99
class AvahiService(object):
100
"""An Avahi (Zeroconf) service.
102
interface: integer; avahi.IF_UNSPEC or an interface index.
103
Used to optionally bind to the specified interface.
104
name: string; Example: 'Mandos'
105
type: string; Example: '_mandos._tcp'.
106
See <http://www.dns-sd.org/ServiceTypes.html>
107
port: integer; what port to announce
108
TXT: list of strings; TXT record for the service
109
domain: string; Domain to publish on, default to .local if empty.
110
host: string; Host to publish records for, default is localhost
111
max_renames: integer; maximum number of renames
112
rename_count: integer; counter so we only rename after collisions
113
a sensible number of times
115
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
116
servicetype = None, port = None, TXT = None,
117
domain = "", host = "", max_renames = 32768,
118
protocol = avahi.PROTO_UNSPEC):
119
self.interface = interface
121
self.type = servicetype
123
self.TXT = TXT if TXT is not None else []
126
self.rename_count = 0
127
self.max_renames = max_renames
128
self.protocol = protocol
130
"""Derived from the Avahi example code"""
131
if self.rename_count >= self.max_renames:
132
logger.critical(u"No suitable Zeroconf service name found"
133
u" after %i retries, exiting.",
135
raise AvahiServiceError(u"Too many renames")
136
self.name = server.GetAlternativeServiceName(self.name)
137
logger.info(u"Changing Zeroconf service name to %r ...",
139
syslogger.setFormatter(logging.Formatter
140
('Mandos (%s) [%%(process)d]:'
141
' %%(levelname)s: %%(message)s'
145
self.rename_count += 1
147
"""Derived from the Avahi example code"""
148
if group is not None:
151
"""Derived from the Avahi example code"""
154
group = dbus.Interface(bus.get_object
156
server.EntryGroupNew()),
157
avahi.DBUS_INTERFACE_ENTRY_GROUP)
158
group.connect_to_signal('StateChanged',
159
entry_group_state_changed)
160
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
161
service.name, service.type)
163
self.interface, # interface
164
self.protocol, # protocol
165
dbus.UInt32(0), # flags
166
self.name, self.type,
167
self.domain, self.host,
168
dbus.UInt16(self.port),
169
avahi.string_array_to_txt_array(self.TXT))
172
# From the Avahi example code:
173
group = None # our entry group
31
# This variable is used to optionally bind to a specified interface.
32
# It is a global variable to fit in with the other variables from the
33
# Avahi server example code.
34
serviceInterface = avahi.IF_UNSPEC
35
# From the Avahi server example code:
36
serviceName = "Mandos"
37
serviceType = "_mandos._tcp" # http://www.dns-sd.org/ServiceTypes.html
38
servicePort = None # Not known at startup
39
serviceTXT = [] # TXT record for the service
40
domain = "" # Domain to publish on, default to .local
41
host = "" # Host to publish records for, default to localhost
42
group = None #our entry group
43
rename_count = 12 # Counter so we only rename after collisions a
44
# sensible number of times
174
45
# End of Avahi example code
177
def _datetime_to_dbus(dt, variant_level=0):
178
"""Convert a UTC datetime.datetime() to a D-Bus type."""
179
return dbus.String(dt.isoformat(), variant_level=variant_level)
182
48
class Client(object):
183
49
"""A representation of a client host served by this server.
185
name: string; from the config file, used in log messages and
51
name: string; from the config file, used in log messages
187
52
fingerprint: string (40 or 32 hexadecimal digits); used to
188
53
uniquely identify the client
189
secret: bytestring; sent verbatim (over TLS) to client
190
host: string; available for use by the checker command
191
created: datetime.datetime(); (UTC) object creation
192
last_enabled: datetime.datetime(); (UTC)
194
last_checked_ok: datetime.datetime(); (UTC) or None
195
timeout: datetime.timedelta(); How long from last_checked_ok
196
until this client is invalid
197
interval: datetime.timedelta(); How often to start a new checker
198
disable_hook: If set, called by disable() as disable_hook(self)
199
checker: subprocess.Popen(); a running checker process used
200
to see if the client lives.
201
'None' if no process is running.
54
secret: bytestring; sent verbatim (over TLS) to client
55
fqdn: string (FQDN); available for use by the checker command
56
created: datetime.datetime()
57
last_seen: datetime.datetime() or None if not yet seen
58
timeout: datetime.timedelta(); How long from last_seen until
59
this client is invalid
60
interval: datetime.timedelta(); How often to start a new checker
61
stop_hook: If set, called by stop() as stop_hook(self)
62
checker: subprocess.Popen(); a running checker process used
63
to see if the client lives.
64
Is None if no process is running.
202
65
checker_initiator_tag: a gobject event source tag, or None
203
disable_initiator_tag: - '' -
66
stop_initiator_tag: - '' -
204
67
checker_callback_tag: - '' -
205
68
checker_command: string; External command which is run to check if
206
client lives. %() expansions are done at
69
client lives. %()s expansions are done at
207
70
runtime with vars(self) as dict, so that for
208
71
instance %(name)s can be used in the command.
209
current_checker_command: string; current running checker_command
73
_timeout: Real variable for 'timeout'
74
_interval: Real variable for 'interval'
75
_timeout_milliseconds: Used by gobject.timeout_add()
76
_interval_milliseconds: - '' -
211
def timeout_milliseconds(self):
212
"Return the 'timeout' attribute in milliseconds"
213
return ((self.timeout.days * 24 * 60 * 60 * 1000)
214
+ (self.timeout.seconds * 1000)
215
+ (self.timeout.microseconds // 1000))
217
def interval_milliseconds(self):
218
"Return the 'interval' attribute in milliseconds"
219
return ((self.interval.days * 24 * 60 * 60 * 1000)
220
+ (self.interval.seconds * 1000)
221
+ (self.interval.microseconds // 1000))
223
def __init__(self, name = None, disable_hook=None, config=None):
224
"""Note: the 'checker' key in 'config' sets the
225
'checker_command' attribute and *not* the 'checker'
78
def _set_timeout(self, timeout):
79
"Setter function for 'timeout' attribute"
80
self._timeout = timeout
81
self._timeout_milliseconds = ((self.timeout.days
82
* 24 * 60 * 60 * 1000)
83
+ (self.timeout.seconds * 1000)
84
+ (self.timeout.microseconds
86
timeout = property(lambda self: self._timeout,
89
def _set_interval(self, interval):
90
"Setter function for 'interval' attribute"
91
self._interval = interval
92
self._interval_milliseconds = ((self.interval.days
93
* 24 * 60 * 60 * 1000)
94
+ (self.interval.seconds
96
+ (self.interval.microseconds
98
interval = property(lambda self: self._interval,
101
def __init__(self, name=None, options=None, stop_hook=None,
102
fingerprint=None, secret=None, secfile=None, fqdn=None,
103
timeout=None, interval=-1, checker=None):
230
logger.debug(u"Creating client %r", self.name)
231
# Uppercase and remove spaces from fingerprint for later
232
# comparison purposes with return value from the fingerprint()
234
self.fingerprint = (config["fingerprint"].upper()
236
logger.debug(u" Fingerprint: %s", self.fingerprint)
237
if "secret" in config:
238
self.secret = config["secret"].decode(u"base64")
239
elif "secfile" in config:
240
with closing(open(os.path.expanduser
242
(config["secfile"])))) as secfile:
243
self.secret = secfile.read()
245
raise TypeError(u"No secret or secfile for client %s"
247
self.host = config.get("host", "")
248
self.created = datetime.datetime.utcnow()
250
self.last_enabled = None
251
self.last_checked_ok = None
252
self.timeout = string_to_delta(config["timeout"])
253
self.interval = string_to_delta(config["interval"])
254
self.disable_hook = disable_hook
105
# Uppercase and remove spaces from fingerprint
106
# for later comparison purposes with return value of
107
# the fingerprint() function
108
self.fingerprint = fingerprint.upper().replace(u" ", u"")
110
self.secret = secret.decode(u"base64")
113
self.secret = sf.read()
116
raise RuntimeError(u"No secret or secfile for client %s"
118
self.fqdn = fqdn # string
119
self.created = datetime.datetime.now()
120
self.last_seen = None
122
timeout = options.timeout
123
self.timeout = timeout
125
interval = options.interval
127
interval = string_to_delta(interval)
128
self.interval = interval
129
self.stop_hook = stop_hook
255
130
self.checker = None
256
131
self.checker_initiator_tag = None
257
self.disable_initiator_tag = None
132
self.stop_initiator_tag = None
258
133
self.checker_callback_tag = None
259
self.checker_command = config["checker"]
260
self.current_checker_command = None
261
self.last_connect = None
264
"""Start this client's checker and timeout hooks"""
265
self.last_enabled = datetime.datetime.utcnow()
134
self.check_command = checker
136
"""Start this clients checker and timeout hooks"""
266
137
# Schedule a new checker to be started an 'interval' from now,
267
138
# and every interval from then on.
268
self.checker_initiator_tag = (gobject.timeout_add
269
(self.interval_milliseconds(),
139
self.checker_initiator_tag = gobject.timeout_add\
140
(self._interval_milliseconds,
271
142
# Also start a new checker *right now*.
272
143
self.start_checker()
273
# Schedule a disable() when 'timeout' has passed
274
self.disable_initiator_tag = (gobject.timeout_add
275
(self.timeout_milliseconds(),
280
"""Disable this client."""
281
if not getattr(self, "enabled", False):
283
logger.info(u"Disabling client %s", self.name)
284
if getattr(self, "disable_initiator_tag", False):
285
gobject.source_remove(self.disable_initiator_tag)
286
self.disable_initiator_tag = None
287
if getattr(self, "checker_initiator_tag", False):
144
# Schedule a stop() when 'timeout' has passed
145
self.stop_initiator_tag = gobject.timeout_add\
146
(self._timeout_milliseconds,
150
The possibility that this client might be restarted is left
151
open, but not currently used."""
153
sys.stderr.write(u"Stopping client %s\n" % self.name)
155
if self.stop_initiator_tag:
156
gobject.source_remove(self.stop_initiator_tag)
157
self.stop_initiator_tag = None
158
if self.checker_initiator_tag:
288
159
gobject.source_remove(self.checker_initiator_tag)
289
160
self.checker_initiator_tag = None
290
161
self.stop_checker()
291
if self.disable_hook:
292
self.disable_hook(self)
294
164
# Do not run this again if called by a gobject.timeout_add
297
166
def __del__(self):
298
self.disable_hook = None
301
def checker_callback(self, pid, condition, command):
167
# Some code duplication here and in stop()
168
if hasattr(self, "stop_initiator_tag") \
169
and self.stop_initiator_tag:
170
gobject.source_remove(self.stop_initiator_tag)
171
self.stop_initiator_tag = None
172
if hasattr(self, "checker_initiator_tag") \
173
and self.checker_initiator_tag:
174
gobject.source_remove(self.checker_initiator_tag)
175
self.checker_initiator_tag = None
177
def checker_callback(self, pid, condition):
302
178
"""The checker has completed, so take appropriate actions."""
179
now = datetime.datetime.now()
180
if os.WIFEXITED(condition) \
181
and (os.WEXITSTATUS(condition) == 0):
183
sys.stderr.write(u"Checker for %(name)s succeeded\n"
186
gobject.source_remove(self.stop_initiator_tag)
187
self.stop_initiator_tag = gobject.timeout_add\
188
(self._timeout_milliseconds,
191
if not os.WIFEXITED(condition):
192
sys.stderr.write(u"Checker for %(name)s crashed?\n"
195
sys.stderr.write(u"Checker for %(name)s failed\n"
303
198
self.checker_callback_tag = None
305
if os.WIFEXITED(condition):
306
exitstatus = os.WEXITSTATUS(condition)
308
logger.info(u"Checker for %(name)s succeeded",
312
logger.info(u"Checker for %(name)s failed",
315
logger.warning(u"Checker for %(name)s crashed?",
318
def checked_ok(self):
319
"""Bump up the timeout for this client.
320
This should only be called when the client has been seen,
323
self.last_checked_ok = datetime.datetime.utcnow()
324
gobject.source_remove(self.disable_initiator_tag)
325
self.disable_initiator_tag = (gobject.timeout_add
326
(self.timeout_milliseconds(),
329
199
def start_checker(self):
330
200
"""Start a new checker subprocess if one is not running.
331
201
If a checker already exists, leave it running and do
333
# The reason for not killing a running checker is that if we
334
# did that, then if a checker (for some reason) started
335
# running slowly and taking more than 'interval' time, the
336
# client would inevitably timeout, since no checker would get
337
# a chance to run to completion. If we instead leave running
338
# checkers alone, the checker would have to take more time
339
# than 'timeout' for the client to be declared invalid, which
340
# is as it should be.
342
# If a checker exists, make sure it is not a zombie
343
if self.checker is not None:
344
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
346
logger.warning("Checker was a zombie")
347
gobject.source_remove(self.checker_callback_tag)
348
self.checker_callback(pid, status,
349
self.current_checker_command)
350
# Start a new checker if needed
351
203
if self.checker is None:
205
sys.stderr.write(u"Starting checker for %s\n"
353
# In case checker_command has exactly one % operator
354
command = self.checker_command % self.host
208
command = self.check_command % self.fqdn
355
209
except TypeError:
356
# Escape attributes for the shell
357
210
escaped_attrs = dict((key, re.escape(str(val)))
359
212
vars(self).iteritems())
361
command = self.checker_command % escaped_attrs
362
except TypeError, error:
363
logger.error(u'Could not format string "%s":'
364
u' %s', self.checker_command, error)
365
return True # Try again later
366
self.current_checker_command = command
213
command = self.check_command % escaped_attrs
368
logger.info(u"Starting checker %r for %s",
370
# We don't need to redirect stdout and stderr, since
371
# in normal mode, that is already done by daemon(),
372
# and in debug mode we don't want to. (Stdin is
373
# always replaced by /dev/null.)
374
self.checker = subprocess.Popen(command,
377
self.checker_callback_tag = (gobject.child_watch_add
379
self.checker_callback,
381
# The checker may have completed before the gobject
382
# watch was added. Check for this.
383
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
385
gobject.source_remove(self.checker_callback_tag)
386
self.checker_callback(pid, status, command)
387
except OSError, error:
388
logger.error(u"Failed to start subprocess: %s",
215
self.checker = subprocess.\
217
stdout=subprocess.PIPE,
218
close_fds=True, shell=True,
220
self.checker_callback_tag = gobject.\
221
child_watch_add(self.checker.pid,
224
except subprocess.OSError, error:
225
sys.stderr.write(u"Failed to start subprocess: %s\n"
390
227
# Re-run this periodically if run by gobject.timeout_add
393
229
def stop_checker(self):
394
230
"""Force the checker process, if any, to stop."""
395
if self.checker_callback_tag:
396
gobject.source_remove(self.checker_callback_tag)
397
self.checker_callback_tag = None
398
if getattr(self, "checker", None) is None:
231
if not hasattr(self, "checker") or self.checker is None:
400
logger.debug(u"Stopping checker for %(name)s", vars(self))
402
os.kill(self.checker.pid, signal.SIGTERM)
404
#if self.checker.poll() is None:
405
# os.kill(self.checker.pid, signal.SIGKILL)
406
except OSError, error:
407
if error.errno != errno.ESRCH: # No such process
233
gobject.source_remove(self.checker_callback_tag)
234
self.checker_callback_tag = None
235
os.kill(self.checker.pid, signal.SIGTERM)
236
if self.checker.poll() is None:
237
os.kill(self.checker.pid, signal.SIGKILL)
409
238
self.checker = None
411
def still_valid(self):
239
def still_valid(self, now=None):
412
240
"""Has the timeout not yet passed for this client?"""
413
if not getattr(self, "enabled", False):
415
now = datetime.datetime.utcnow()
416
if self.last_checked_ok is None:
242
now = datetime.datetime.now()
243
if self.last_seen is None:
417
244
return now < (self.created + self.timeout)
419
return now < (self.last_checked_ok + self.timeout)
422
class ClientDBus(Client, dbus.service.Object):
423
"""A Client class using D-Bus
425
dbus_object_path: dbus.ObjectPath ; only set if self.use_dbus
427
# dbus.service.Object doesn't use super(), so we can't either.
429
def __init__(self, *args, **kwargs):
430
Client.__init__(self, *args, **kwargs)
431
# Only now, when this client is initialized, can it show up on
433
self.dbus_object_path = (dbus.ObjectPath
435
+ self.name.replace(".", "_")))
436
dbus.service.Object.__init__(self, bus,
437
self.dbus_object_path)
439
oldstate = getattr(self, "enabled", False)
440
r = Client.enable(self)
441
if oldstate != self.enabled:
443
self.PropertyChanged(dbus.String(u"enabled"),
444
dbus.Boolean(True, variant_level=1))
445
self.PropertyChanged(dbus.String(u"last_enabled"),
446
(_datetime_to_dbus(self.last_enabled,
450
def disable(self, signal = True):
451
oldstate = getattr(self, "enabled", False)
452
r = Client.disable(self)
453
if signal and oldstate != self.enabled:
455
self.PropertyChanged(dbus.String(u"enabled"),
456
dbus.Boolean(False, variant_level=1))
459
def __del__(self, *args, **kwargs):
461
self.remove_from_connection()
462
except org.freedesktop.DBus.Python.LookupError:
464
dbus.service.Object.__del__(self, *args, **kwargs)
465
Client.__del__(self, *args, **kwargs)
467
def checker_callback(self, pid, condition, command,
469
self.checker_callback_tag = None
472
self.PropertyChanged(dbus.String(u"checker_running"),
473
dbus.Boolean(False, variant_level=1))
474
if os.WIFEXITED(condition):
475
exitstatus = os.WEXITSTATUS(condition)
477
self.CheckerCompleted(dbus.Int16(exitstatus),
478
dbus.Int64(condition),
479
dbus.String(command))
482
self.CheckerCompleted(dbus.Int16(-1),
483
dbus.Int64(condition),
484
dbus.String(command))
486
return Client.checker_callback(self, pid, condition, command,
489
def checked_ok(self, *args, **kwargs):
490
r = Client.checked_ok(self, *args, **kwargs)
492
self.PropertyChanged(
493
dbus.String(u"last_checked_ok"),
494
(_datetime_to_dbus(self.last_checked_ok,
498
def start_checker(self, *args, **kwargs):
499
old_checker = self.checker
500
if self.checker is not None:
501
old_checker_pid = self.checker.pid
503
old_checker_pid = None
504
r = Client.start_checker(self, *args, **kwargs)
505
# Only emit D-Bus signal if new checker process was started
506
if ((self.checker is not None)
507
and not (old_checker is not None
508
and old_checker_pid == self.checker.pid)):
509
self.CheckerStarted(self.current_checker_command)
510
self.PropertyChanged(
511
dbus.String("checker_running"),
512
dbus.Boolean(True, variant_level=1))
515
def stop_checker(self, *args, **kwargs):
516
old_checker = getattr(self, "checker", None)
517
r = Client.stop_checker(self, *args, **kwargs)
518
if (old_checker is not None
519
and getattr(self, "checker", None) is None):
520
self.PropertyChanged(dbus.String(u"checker_running"),
521
dbus.Boolean(False, variant_level=1))
524
## D-Bus methods & signals
525
_interface = u"se.bsnet.fukt.Mandos.Client"
528
CheckedOK = dbus.service.method(_interface)(checked_ok)
529
CheckedOK.__name__ = "CheckedOK"
531
# CheckerCompleted - signal
532
@dbus.service.signal(_interface, signature="nxs")
533
def CheckerCompleted(self, exitcode, waitstatus, command):
537
# CheckerStarted - signal
538
@dbus.service.signal(_interface, signature="s")
539
def CheckerStarted(self, command):
543
# GetAllProperties - method
544
@dbus.service.method(_interface, out_signature="a{sv}")
545
def GetAllProperties(self):
547
return dbus.Dictionary({
549
dbus.String(self.name, variant_level=1),
550
dbus.String("fingerprint"):
551
dbus.String(self.fingerprint, variant_level=1),
553
dbus.String(self.host, variant_level=1),
554
dbus.String("created"):
555
_datetime_to_dbus(self.created, variant_level=1),
556
dbus.String("last_enabled"):
557
(_datetime_to_dbus(self.last_enabled,
559
if self.last_enabled is not None
560
else dbus.Boolean(False, variant_level=1)),
561
dbus.String("enabled"):
562
dbus.Boolean(self.enabled, variant_level=1),
563
dbus.String("last_checked_ok"):
564
(_datetime_to_dbus(self.last_checked_ok,
566
if self.last_checked_ok is not None
567
else dbus.Boolean (False, variant_level=1)),
568
dbus.String("timeout"):
569
dbus.UInt64(self.timeout_milliseconds(),
571
dbus.String("interval"):
572
dbus.UInt64(self.interval_milliseconds(),
574
dbus.String("checker"):
575
dbus.String(self.checker_command,
577
dbus.String("checker_running"):
578
dbus.Boolean(self.checker is not None,
580
dbus.String("object_path"):
581
dbus.ObjectPath(self.dbus_object_path,
585
# IsStillValid - method
586
@dbus.service.method(_interface, out_signature="b")
587
def IsStillValid(self):
588
return self.still_valid()
590
# PropertyChanged - signal
591
@dbus.service.signal(_interface, signature="sv")
592
def PropertyChanged(self, property, value):
596
# ReceivedSecret - signal
597
@dbus.service.signal(_interface)
598
def ReceivedSecret(self):
603
@dbus.service.signal(_interface)
608
# SetChecker - method
609
@dbus.service.method(_interface, in_signature="s")
610
def SetChecker(self, checker):
611
"D-Bus setter method"
612
self.checker_command = checker
614
self.PropertyChanged(dbus.String(u"checker"),
615
dbus.String(self.checker_command,
619
@dbus.service.method(_interface, in_signature="s")
620
def SetHost(self, host):
621
"D-Bus setter method"
624
self.PropertyChanged(dbus.String(u"host"),
625
dbus.String(self.host, variant_level=1))
627
# SetInterval - method
628
@dbus.service.method(_interface, in_signature="t")
629
def SetInterval(self, milliseconds):
630
self.interval = datetime.timedelta(0, 0, 0, milliseconds)
632
self.PropertyChanged(dbus.String(u"interval"),
633
(dbus.UInt64(self.interval_milliseconds(),
637
@dbus.service.method(_interface, in_signature="ay",
639
def SetSecret(self, secret):
640
"D-Bus setter method"
641
self.secret = str(secret)
643
# SetTimeout - method
644
@dbus.service.method(_interface, in_signature="t")
645
def SetTimeout(self, milliseconds):
646
self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
648
self.PropertyChanged(dbus.String(u"timeout"),
649
(dbus.UInt64(self.timeout_milliseconds(),
653
Enable = dbus.service.method(_interface)(enable)
654
Enable.__name__ = "Enable"
656
# StartChecker - method
657
@dbus.service.method(_interface)
658
def StartChecker(self):
663
@dbus.service.method(_interface)
668
# StopChecker - method
669
StopChecker = dbus.service.method(_interface)(stop_checker)
670
StopChecker.__name__ = "StopChecker"
246
return now < (self.last_seen + self.timeout)
675
249
def peer_certificate(session):
676
"Return the peer's OpenPGP certificate as a bytestring"
677
250
# If not an OpenPGP certificate...
678
if (gnutls.library.functions
679
.gnutls_certificate_type_get(session._c_object)
680
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
251
if gnutls.library.functions.gnutls_certificate_type_get\
252
(session._c_object) \
253
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP:
681
254
# ...do the normal thing
682
255
return session.peer_certificate
683
list_size = ctypes.c_uint(1)
684
cert_list = (gnutls.library.functions
685
.gnutls_certificate_get_peers
686
(session._c_object, ctypes.byref(list_size)))
687
if not bool(cert_list) and list_size.value != 0:
688
raise gnutls.errors.GNUTLSError("error getting peer"
256
list_size = ctypes.c_uint()
257
cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
258
(session._c_object, ctypes.byref(list_size))
690
259
if list_size.value == 0:
692
261
cert = cert_list[0]
696
265
def fingerprint(openpgp):
697
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
698
# New GnuTLS "datum" with the OpenPGP public key
699
datum = (gnutls.library.types
700
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
703
ctypes.c_uint(len(openpgp))))
704
266
# New empty GnuTLS certificate
705
267
crt = gnutls.library.types.gnutls_openpgp_crt_t()
706
(gnutls.library.functions
707
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
268
gnutls.library.functions.gnutls_openpgp_crt_init\
270
# New GnuTLS "datum" with the OpenPGP public key
271
datum = gnutls.library.types.gnutls_datum_t\
272
(ctypes.cast(ctypes.c_char_p(openpgp),
273
ctypes.POINTER(ctypes.c_ubyte)),
274
ctypes.c_uint(len(openpgp)))
708
275
# Import the OpenPGP public key into the certificate
709
(gnutls.library.functions
710
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
711
gnutls.library.constants
712
.GNUTLS_OPENPGP_FMT_RAW))
713
# Verify the self signature in the key
714
crtverify = ctypes.c_uint()
715
(gnutls.library.functions
716
.gnutls_openpgp_crt_verify_self(crt, 0, ctypes.byref(crtverify)))
717
if crtverify.value != 0:
718
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
719
raise gnutls.errors.CertificateSecurityError("Verify failed")
276
ret = gnutls.library.functions.gnutls_openpgp_crt_import\
279
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
720
280
# New buffer for the fingerprint
721
buf = ctypes.create_string_buffer(20)
722
buf_len = ctypes.c_size_t()
281
buffer = ctypes.create_string_buffer(20)
282
buffer_length = ctypes.c_size_t()
723
283
# Get the fingerprint from the certificate into the buffer
724
(gnutls.library.functions
725
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
726
ctypes.byref(buf_len)))
284
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
285
(crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
727
286
# Deinit the certificate
728
287
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
729
288
# Convert the buffer to a Python bytestring
730
fpr = ctypes.string_at(buf, buf_len.value)
289
fpr = ctypes.string_at(buffer, buffer_length.value)
731
290
# Convert the bytestring to hexadecimal notation
732
291
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
736
class TCP_handler(SocketServer.BaseRequestHandler, object):
295
class tcp_handler(SocketServer.BaseRequestHandler, object):
737
296
"""A TCP request handler class.
738
297
Instantiated by IPv6_TCPServer for each request to handle it.
739
298
Note: This will run in its own forked process."""
741
300
def handle(self):
742
logger.info(u"TCP connection from: %s",
743
unicode(self.client_address))
744
logger.debug(u"IPC Pipe FD: %d", self.server.pipe[1])
745
# Open IPC pipe to parent process
746
with closing(os.fdopen(self.server.pipe[1], "w", 1)) as ipc:
747
session = (gnutls.connection
748
.ClientSession(self.request,
752
line = self.request.makefile().readline()
753
logger.debug(u"Protocol version: %r", line)
755
if int(line.strip().split()[0]) > 1:
757
except (ValueError, IndexError, RuntimeError), error:
758
logger.error(u"Unknown protocol version: %s", error)
761
# Note: gnutls.connection.X509Credentials is really a
762
# generic GnuTLS certificate credentials object so long as
763
# no X.509 keys are added to it. Therefore, we can use it
764
# here despite using OpenPGP certificates.
766
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
767
# "+AES-256-CBC", "+SHA1",
768
# "+COMP-NULL", "+CTYPE-OPENPGP",
770
# Use a fallback default, since this MUST be set.
771
priority = self.server.settings.get("priority", "NORMAL")
772
(gnutls.library.functions
773
.gnutls_priority_set_direct(session._c_object,
778
except gnutls.errors.GNUTLSError, error:
779
logger.warning(u"Handshake failed: %s", error)
780
# Do not run session.bye() here: the session is not
781
# established. Just abandon the request.
783
logger.debug(u"Handshake succeeded")
785
fpr = fingerprint(peer_certificate(session))
786
except (TypeError, gnutls.errors.GNUTLSError), error:
787
logger.warning(u"Bad certificate: %s", error)
790
logger.debug(u"Fingerprint: %s", fpr)
792
for c in self.server.clients:
793
if c.fingerprint == fpr:
797
logger.warning(u"Client not found for fingerprint: %s",
799
ipc.write("NOTFOUND %s\n" % fpr)
802
# Have to check if client.still_valid(), since it is
803
# possible that the client timed out while establishing
804
# the GnuTLS session.
805
if not client.still_valid():
806
logger.warning(u"Client %(name)s is invalid",
808
ipc.write("INVALID %s\n" % client.name)
811
ipc.write("SENDING %s\n" % client.name)
813
while sent_size < len(client.secret):
814
sent = session.send(client.secret[sent_size:])
815
logger.debug(u"Sent: %d, remaining: %d",
816
sent, len(client.secret)
817
- (sent_size + sent))
822
class ForkingMixInWithPipe(SocketServer.ForkingMixIn, object):
823
"""Like SocketServer.ForkingMixIn, but also pass a pipe.
824
Assumes a gobject.MainLoop event loop.
826
def process_request(self, request, client_address):
827
"""This overrides and wraps the original process_request().
828
This function creates a new pipe in self.pipe
830
self.pipe = os.pipe()
831
super(ForkingMixInWithPipe,
832
self).process_request(request, client_address)
833
os.close(self.pipe[1]) # close write end
834
# Call "handle_ipc" for both data and EOF events
835
gobject.io_add_watch(self.pipe[0],
836
gobject.IO_IN | gobject.IO_HUP,
838
def handle_ipc(source, condition):
839
"""Dummy function; override as necessary"""
844
class IPv6_TCPServer(ForkingMixInWithPipe,
845
SocketServer.TCPServer, object):
846
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
302
sys.stderr.write(u"TCP request came\n")
303
sys.stderr.write(u"Request: %s\n" % self.request)
304
sys.stderr.write(u"Client Address: %s\n"
305
% unicode(self.client_address))
306
sys.stderr.write(u"Server: %s\n" % self.server)
307
session = gnutls.connection.ClientSession(self.request,
311
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
312
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
314
priority = "SECURE256"
316
gnutls.library.functions.gnutls_priority_set_direct\
317
(session._c_object, priority, None);
321
except gnutls.errors.GNUTLSError, error:
323
sys.stderr.write(u"Handshake failed: %s\n" % error)
324
# Do not run session.bye() here: the session is not
325
# established. Just abandon the request.
328
fpr = fingerprint(peer_certificate(session))
329
except (TypeError, gnutls.errors.GNUTLSError), error:
331
sys.stderr.write(u"Bad certificate: %s\n" % error)
335
sys.stderr.write(u"Fingerprint: %s\n" % fpr)
338
if c.fingerprint == fpr:
341
# Have to check if client.still_valid(), since it is possible
342
# that the client timed out while establishing the GnuTLS
344
if (not client) or (not client.still_valid()):
347
sys.stderr.write(u"Client %(name)s is invalid\n"
350
sys.stderr.write(u"Client not found for "
351
u"fingerprint: %s\n" % fpr)
355
while sent_size < len(client.secret):
356
sent = session.send(client.secret[sent_size:])
358
sys.stderr.write(u"Sent: %d, remaining: %d\n"
359
% (sent, len(client.secret)
360
- (sent_size + sent)))
365
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
366
"""IPv6 TCP server. Accepts 'None' as address and/or port.
848
settings: Server settings
368
options: Command line options
849
369
clients: Set() of Client objects
850
enabled: Boolean; whether this server is activated yet
852
371
address_family = socket.AF_INET6
853
372
def __init__(self, *args, **kwargs):
854
if "settings" in kwargs:
855
self.settings = kwargs["settings"]
856
del kwargs["settings"]
373
if "options" in kwargs:
374
self.options = kwargs["options"]
375
del kwargs["options"]
857
376
if "clients" in kwargs:
858
377
self.clients = kwargs["clients"]
859
378
del kwargs["clients"]
860
if "use_ipv6" in kwargs:
861
if not kwargs["use_ipv6"]:
862
self.address_family = socket.AF_INET
863
del kwargs["use_ipv6"]
865
super(IPv6_TCPServer, self).__init__(*args, **kwargs)
379
return super(type(self), self).__init__(*args, **kwargs)
866
380
def server_bind(self):
867
381
"""This overrides the normal server_bind() function
868
382
to bind to an interface if one was specified, and also NOT to
869
383
bind to an address or port if they were not specified."""
870
if self.settings["interface"]:
871
# 25 is from /usr/include/asm-i486/socket.h
872
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
384
if self.options.interface:
385
if not hasattr(socket, "SO_BINDTODEVICE"):
386
# From /usr/include/asm-i486/socket.h
387
socket.SO_BINDTODEVICE = 25
874
389
self.socket.setsockopt(socket.SOL_SOCKET,
876
self.settings["interface"])
390
socket.SO_BINDTODEVICE,
391
self.options.interface)
877
392
except socket.error, error:
878
393
if error[0] == errno.EPERM:
879
logger.error(u"No permission to"
880
u" bind to interface %s",
881
self.settings["interface"])
394
sys.stderr.write(u"Warning: No permission to" \
395
u" bind to interface %s\n"
396
% self.options.interface)
884
399
# Only bind(2) the socket if we really need to.
885
400
if self.server_address[0] or self.server_address[1]:
886
401
if not self.server_address[0]:
887
if self.address_family == socket.AF_INET6:
888
any_address = "::" # in6addr_any
890
any_address = socket.INADDR_ANY
891
self.server_address = (any_address,
403
self.server_address = (in6addr_any,
892
404
self.server_address[1])
893
elif not self.server_address[1]:
405
elif self.server_address[1] is None:
894
406
self.server_address = (self.server_address[0],
896
# if self.settings["interface"]:
897
# self.server_address = (self.server_address[0],
903
return super(IPv6_TCPServer, self).server_bind()
904
def server_activate(self):
906
return super(IPv6_TCPServer, self).server_activate()
909
def handle_ipc(self, source, condition, file_objects={}):
911
gobject.IO_IN: "IN", # There is data to read.
912
gobject.IO_OUT: "OUT", # Data can be written (without
914
gobject.IO_PRI: "PRI", # There is urgent data to read.
915
gobject.IO_ERR: "ERR", # Error condition.
916
gobject.IO_HUP: "HUP" # Hung up (the connection has been
917
# broken, usually for pipes and
920
conditions_string = ' | '.join(name
922
condition_names.iteritems()
924
logger.debug("Handling IPC: FD = %d, condition = %s", source,
927
# Turn the pipe file descriptor into a Python file object
928
if source not in file_objects:
929
file_objects[source] = os.fdopen(source, "r", 1)
931
# Read a line from the file object
932
cmdline = file_objects[source].readline()
933
if not cmdline: # Empty line means end of file
935
file_objects[source].close()
936
del file_objects[source]
938
# Stop calling this function
941
logger.debug("IPC command: %r\n" % cmdline)
943
# Parse and act on command
944
cmd, args = cmdline.split(None, 1)
945
if cmd == "NOTFOUND":
946
if self.settings["use_dbus"]:
948
mandos_dbus_service.ClientNotFound(args)
949
elif cmd == "INVALID":
950
if self.settings["use_dbus"]:
951
for client in self.clients:
952
if client.name == args:
956
elif cmd == "SENDING":
957
for client in self.clients:
958
if client.name == args:
960
if self.settings["use_dbus"]:
962
client.ReceivedSecret()
965
logger.error("Unknown IPC command: %r", cmdline)
967
# Keep calling this function
408
return super(type(self), self).server_bind()
971
411
def string_to_delta(interval):
972
412
"""Parse a string and return a datetime.timedelta
974
414
>>> string_to_delta('7d')
975
415
datetime.timedelta(7)
976
416
>>> string_to_delta('60s')
981
421
datetime.timedelta(1)
982
422
>>> string_to_delta(u'1w')
983
423
datetime.timedelta(7)
984
>>> string_to_delta('5m 30s')
985
datetime.timedelta(0, 330)
987
timevalue = datetime.timedelta(0)
988
for s in interval.split():
990
suffix = unicode(s[-1])
993
delta = datetime.timedelta(value)
995
delta = datetime.timedelta(0, value)
997
delta = datetime.timedelta(0, 0, 0, 0, value)
999
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
1000
elif suffix == u"w":
1001
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1004
except (ValueError, IndexError):
426
suffix=unicode(interval[-1])
427
value=int(interval[:-1])
429
delta = datetime.timedelta(value)
431
delta = datetime.timedelta(0, value)
433
delta = datetime.timedelta(0, 0, 0, 0, value)
435
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
437
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1005
439
raise ValueError
440
except (ValueError, IndexError):
446
"""From the Avahi server example code"""
447
global group, serviceName, serviceType, servicePort, serviceTXT, \
450
group = dbus.Interface(
451
bus.get_object( avahi.DBUS_NAME,
452
server.EntryGroupNew()),
453
avahi.DBUS_INTERFACE_ENTRY_GROUP)
454
group.connect_to_signal('StateChanged',
455
entry_group_state_changed)
457
sys.stderr.write(u"Adding service '%s' of type '%s' ...\n"
458
% (serviceName, serviceType))
461
serviceInterface, # interface
462
avahi.PROTO_INET6, # protocol
463
dbus.UInt32(0), # flags
464
serviceName, serviceType,
466
dbus.UInt16(servicePort),
467
avahi.string_array_to_txt_array(serviceTXT))
471
def remove_service():
472
"""From the Avahi server example code"""
475
if not group is None:
1010
479
def server_state_changed(state):
1011
"""Derived from the Avahi example code"""
480
"""From the Avahi server example code"""
1012
481
if state == avahi.SERVER_COLLISION:
1013
logger.error(u"Zeroconf server name collision")
482
sys.stderr.write(u"WARNING: Server name collision\n")
1015
484
elif state == avahi.SERVER_RUNNING:
1019
488
def entry_group_state_changed(state, error):
1020
"""Derived from the Avahi example code"""
1021
logger.debug(u"Avahi state change: %i", state)
489
"""From the Avahi server example code"""
490
global serviceName, server, rename_count
493
sys.stderr.write(u"state change: %i\n" % state)
1023
495
if state == avahi.ENTRY_GROUP_ESTABLISHED:
1024
logger.debug(u"Zeroconf service established.")
497
sys.stderr.write(u"Service established.\n")
1025
498
elif state == avahi.ENTRY_GROUP_COLLISION:
1026
logger.warning(u"Zeroconf service name collision.")
500
rename_count = rename_count - 1
502
name = server.GetAlternativeServiceName(name)
503
sys.stderr.write(u"WARNING: Service name collision, "
504
u"changing name to '%s' ...\n" % name)
509
sys.stderr.write(u"ERROR: No suitable service name found "
510
u"after %i retries, exiting.\n"
1028
513
elif state == avahi.ENTRY_GROUP_FAILURE:
1029
logger.critical(u"Avahi: Error in group state changed %s",
1031
raise AvahiGroupError(u"State changed: %s" % unicode(error))
514
sys.stderr.write(u"Error in group state changed %s\n"
1033
520
def if_nametoindex(interface):
1034
"""Call the C function if_nametoindex(), or equivalent"""
1035
global if_nametoindex
521
"""Call the C function if_nametoindex()"""
1037
if_nametoindex = (ctypes.cdll.LoadLibrary
1038
(ctypes.util.find_library("c"))
523
libc = ctypes.cdll.LoadLibrary("libc.so.6")
524
return libc.if_nametoindex(interface)
1040
525
except (OSError, AttributeError):
1041
526
if "struct" not in sys.modules:
1043
528
if "fcntl" not in sys.modules:
1045
def if_nametoindex(interface):
1046
"Get an interface index the hard way, i.e. using fcntl()"
1047
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1048
with closing(socket.socket()) as s:
1049
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1050
struct.pack("16s16x", interface))
1051
interface_index = struct.unpack("I", ifreq[16:20])[0]
1052
return interface_index
1053
return if_nametoindex(interface)
1056
def daemon(nochdir = False, noclose = False):
1057
"""See daemon(3). Standard BSD Unix function.
1058
This should really exist as os.daemon, but it doesn't (yet)."""
1067
# Close all standard open file descriptors
1068
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1069
if not stat.S_ISCHR(os.fstat(null).st_mode):
1070
raise OSError(errno.ENODEV,
1071
"/dev/null not a character device")
1072
os.dup2(null, sys.stdin.fileno())
1073
os.dup2(null, sys.stdout.fileno())
1074
os.dup2(null, sys.stderr.fileno())
1081
######################################################################
1082
# Parsing of options, both command line and config file
1084
parser = optparse.OptionParser(version = "%%prog %s" % version)
530
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
532
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
533
struct.pack("16s16x", interface))
535
interface_index = struct.unpack("I", ifreq[16:20])[0]
536
return interface_index
539
if __name__ == '__main__':
540
parser = OptionParser()
1085
541
parser.add_option("-i", "--interface", type="string",
1086
metavar="IF", help="Bind to interface IF")
1087
parser.add_option("-a", "--address", type="string",
1088
help="Address to listen for requests on")
1089
parser.add_option("-p", "--port", type="int",
542
default=None, metavar="IF",
543
help="Bind to interface IF")
544
parser.add_option("--cert", type="string", default="cert.pem",
546
help="Public key certificate PEM file to use")
547
parser.add_option("--key", type="string", default="key.pem",
549
help="Private key PEM file to use")
550
parser.add_option("--ca", type="string", default="ca.pem",
552
help="Certificate Authority certificate PEM file to use")
553
parser.add_option("--crl", type="string", default="crl.pem",
555
help="Certificate Revokation List PEM file to use")
556
parser.add_option("-p", "--port", type="int", default=None,
1090
557
help="Port number to receive requests on")
1091
parser.add_option("--check", action="store_true",
558
parser.add_option("--timeout", type="string", # Parsed later
560
help="Amount of downtime allowed for clients")
561
parser.add_option("--interval", type="string", # Parsed later
563
help="How often to check that a client is up")
564
parser.add_option("--check", action="store_true", default=False,
1092
565
help="Run self-test")
1093
parser.add_option("--debug", action="store_true",
1094
help="Debug mode; run in foreground and log to"
1096
parser.add_option("--priority", type="string", help="GnuTLS"
1097
" priority string (see GnuTLS documentation)")
1098
parser.add_option("--servicename", type="string", metavar="NAME",
1099
help="Zeroconf service name")
1100
parser.add_option("--configdir", type="string",
1101
default="/etc/mandos", metavar="DIR",
1102
help="Directory to search for configuration"
1104
parser.add_option("--no-dbus", action="store_false",
1106
help="Do not provide D-Bus system bus"
1108
parser.add_option("--no-ipv6", action="store_false",
1109
dest="use_ipv6", help="Do not use IPv6")
1110
options = parser.parse_args()[0]
566
parser.add_option("--debug", action="store_true", default=False,
568
(options, args) = parser.parse_args()
1112
570
if options.check:
1114
572
doctest.testmod()
1117
# Default values for config file for server-global settings
1118
server_defaults = { "interface": "",
1123
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1124
"servicename": "Mandos",
1129
# Parse config file for server-global settings
1130
server_config = ConfigParser.SafeConfigParser(server_defaults)
1132
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1133
# Convert the SafeConfigParser object to a dict
1134
server_settings = server_config.defaults()
1135
# Use the appropriate methods on the non-string config options
1136
server_settings["debug"] = server_config.getboolean("DEFAULT",
1138
server_settings["use_dbus"] = server_config.getboolean("DEFAULT",
1140
server_settings["use_ipv6"] = server_config.getboolean("DEFAULT",
1142
if server_settings["port"]:
1143
server_settings["port"] = server_config.getint("DEFAULT",
1147
# Override the settings from the config file with command line
1149
for option in ("interface", "address", "port", "debug",
1150
"priority", "servicename", "configdir",
1151
"use_dbus", "use_ipv6"):
1152
value = getattr(options, option)
1153
if value is not None:
1154
server_settings[option] = value
1156
# Now we have our good server settings in "server_settings"
1158
##################################################################
1161
debug = server_settings["debug"]
1162
use_dbus = server_settings["use_dbus"]
1163
use_ipv6 = server_settings["use_ipv6"]
1166
syslogger.setLevel(logging.WARNING)
1167
console.setLevel(logging.WARNING)
1169
if server_settings["servicename"] != "Mandos":
1170
syslogger.setFormatter(logging.Formatter
1171
('Mandos (%s) [%%(process)d]:'
1172
' %%(levelname)s: %%(message)s'
1173
% server_settings["servicename"]))
1175
# Parse config file with clients
1176
client_defaults = { "timeout": "1h",
1178
"checker": "fping -q -- %%(host)s",
1181
client_config = ConfigParser.SafeConfigParser(client_defaults)
1182
client_config.read(os.path.join(server_settings["configdir"],
1185
global mandos_dbus_service
1186
mandos_dbus_service = None
1189
tcp_server = IPv6_TCPServer((server_settings["address"],
1190
server_settings["port"]),
1192
settings=server_settings,
1193
clients=clients, use_ipv6=use_ipv6)
1194
pidfilename = "/var/run/mandos.pid"
1196
pidfile = open(pidfilename, "w")
1198
logger.error("Could not open file %r", pidfilename)
1201
uid = pwd.getpwnam("_mandos").pw_uid
1202
gid = pwd.getpwnam("_mandos").pw_gid
1205
uid = pwd.getpwnam("mandos").pw_uid
1206
gid = pwd.getpwnam("mandos").pw_gid
1209
uid = pwd.getpwnam("nobody").pw_uid
1210
gid = pwd.getpwnam("nogroup").pw_gid
1217
except OSError, error:
1218
if error[0] != errno.EPERM:
1221
# Enable all possible GnuTLS debugging
1223
# "Use a log level over 10 to enable all debugging options."
1225
gnutls.library.functions.gnutls_global_set_log_level(11)
1227
@gnutls.library.types.gnutls_log_func
1228
def debug_gnutls(level, string):
1229
logger.debug("GnuTLS: %s", string[:-1])
1231
(gnutls.library.functions
1232
.gnutls_global_set_log_function(debug_gnutls))
1235
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1236
service = AvahiService(name = server_settings["servicename"],
1237
servicetype = "_mandos._tcp",
1238
protocol = protocol)
1239
if server_settings["interface"]:
1240
service.interface = (if_nametoindex
1241
(server_settings["interface"]))
1246
# From the Avahi example code
575
# Parse the time arguments
577
options.timeout = string_to_delta(options.timeout)
579
parser.error("option --timeout: Unparseable time")
581
options.interval = string_to_delta(options.interval)
583
parser.error("option --interval: Unparseable time")
586
defaults = { "checker": "sleep 1; fping -q -- %%(fqdn)s" }
587
client_config = ConfigParser.SafeConfigParser(defaults)
588
#client_config.readfp(open("secrets.conf"), "secrets.conf")
589
client_config.read("mandos-clients.conf")
591
# From the Avahi server example code
1247
592
DBusGMainLoop(set_as_default=True )
1248
593
main_loop = gobject.MainLoop()
1249
594
bus = dbus.SystemBus()
1250
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
1251
avahi.DBUS_PATH_SERVER),
1252
avahi.DBUS_INTERFACE_SERVER)
595
server = dbus.Interface(
596
bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
597
avahi.DBUS_INTERFACE_SERVER )
1253
598
# End of Avahi example code
1255
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
1257
client_class = Client
1259
client_class = ClientDBus
1261
client_class(name = section,
1262
config= dict(client_config.items(section)))
1263
for section in client_config.sections()))
1265
logger.warning(u"No clients defined")
600
debug = options.debug
603
def remove_from_clients(client):
604
clients.remove(client)
607
sys.stderr.write(u"No clients left, exiting\n")
610
clients.update(Set(Client(name=section, options=options,
611
stop_hook = remove_from_clients,
612
**(dict(client_config\
614
for section in client_config.sections()))
615
for client in clients:
618
tcp_server = IPv6_TCPServer((None, options.port),
622
# Find out what random port we got
623
servicePort = tcp_server.socket.getsockname()[1]
1268
# Redirect stdin so all checkers get /dev/null
1269
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1270
os.dup2(null, sys.stdin.fileno())
1274
# No console logging
1275
logger.removeHandler(console)
1276
# Close all input and output, do double fork, etc.
1280
with closing(pidfile):
1282
pidfile.write(str(pid) + "\n")
1285
logger.error(u"Could not write to file %r with PID %d",
1288
# "pidfile" was never created
1293
"Cleanup function; run on exit"
1295
# From the Avahi example code
1296
if not group is None:
1299
# End of Avahi example code
1302
client = clients.pop()
1303
client.disable_hook = None
1306
atexit.register(cleanup)
1309
signal.signal(signal.SIGINT, signal.SIG_IGN)
1310
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1311
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1314
class MandosDBusService(dbus.service.Object):
1315
"""A D-Bus proxy object"""
1317
dbus.service.Object.__init__(self, bus, "/")
1318
_interface = u"se.bsnet.fukt.Mandos"
1320
@dbus.service.signal(_interface, signature="oa{sv}")
1321
def ClientAdded(self, objpath, properties):
1325
@dbus.service.signal(_interface, signature="s")
1326
def ClientNotFound(self, fingerprint):
1330
@dbus.service.signal(_interface, signature="os")
1331
def ClientRemoved(self, objpath, name):
1335
@dbus.service.method(_interface, out_signature="ao")
1336
def GetAllClients(self):
1338
return dbus.Array(c.dbus_object_path for c in clients)
1340
@dbus.service.method(_interface, out_signature="a{oa{sv}}")
1341
def GetAllClientsWithProperties(self):
1343
return dbus.Dictionary(
1344
((c.dbus_object_path, c.GetAllProperties())
1348
@dbus.service.method(_interface, in_signature="o")
1349
def RemoveClient(self, object_path):
1352
if c.dbus_object_path == object_path:
1354
c.remove_from_connection()
1355
# Don't signal anything except ClientRemoved
1356
c.disable(signal=False)
1358
self.ClientRemoved(object_path, c.name)
1364
mandos_dbus_service = MandosDBusService()
1366
for client in clients:
1369
mandos_dbus_service.ClientAdded(client.dbus_object_path,
1370
client.GetAllProperties())
1374
tcp_server.server_activate()
1376
# Find out what port we got
1377
service.port = tcp_server.socket.getsockname()[1]
1379
logger.info(u"Now listening on address %r, port %d,"
1380
" flowinfo %d, scope_id %d"
1381
% tcp_server.socket.getsockname())
1383
logger.info(u"Now listening on address %r, port %d"
1384
% tcp_server.socket.getsockname())
1386
#service.interface = tcp_server.socket.getsockname()[3]
1389
# From the Avahi example code
1390
server.connect_to_signal("StateChanged", server_state_changed)
1392
server_state_changed(server.GetState())
1393
except dbus.exceptions.DBusException, error:
1394
logger.critical(u"DBusException: %s", error)
1396
# End of Avahi example code
1398
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
1399
lambda *args, **kwargs:
1400
(tcp_server.handle_request
1401
(*args[2:], **kwargs) or True))
1403
logger.debug(u"Starting main loop")
625
sys.stderr.write(u"Now listening on port %d\n" % servicePort)
627
if options.interface is not None:
628
serviceInterface = if_nametoindex(options.interface)
630
# From the Avahi server example code
631
server.connect_to_signal("StateChanged", server_state_changed)
632
server_state_changed(server.GetState())
633
# End of Avahi example code
635
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
636
lambda *args, **kwargs:
637
tcp_server.handle_request(*args[2:],
1405
except AvahiError, error:
1406
logger.critical(u"AvahiError: %s", error)
1408
641
except KeyboardInterrupt:
1411
logger.debug("Server received KeyboardInterrupt")
1412
logger.debug("Server exiting")
1414
if __name__ == '__main__':
646
# From the Avahi server example code
647
if not group is None:
649
# End of Avahi example code
651
for client in clients:
652
client.stop_hook = None