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- Committer: Teddy Hogeborn
- Date: 2008-01-18 21:23:46 UTC
- mfrom: (2.1.1 Project)
- Revision ID: teddy@fukt.bsnet.se-20080118212346-qo103d6o8r7xs4za
Merged from Björn.
- files added:
- ca.pem
- files removed:
- .bzr-builddeb
- debian
- debian/po
- plugins.d
- files renamed:
- clients.conf => mandos-clients.conf
- mandos => server.py
- files modified:
- Makefile
added
removed
server.py
1
1
#!/usr/bin/python
2
# -*- mode: python; coding: utf-8 -*-
3
#
4
# Mandos server - give out binary blobs to connecting clients.
5
#
6
# This program is partly derived from an example program for an Avahi
7
# service publisher, downloaded from
8
# <http://avahi.org/wiki/PythonPublishExample>. This includes the
9
# methods "add", "remove", "server_state_changed",
10
# "entry_group_state_changed", "cleanup", and "activate" in the
11
# "AvahiService" class, and some lines in "main".
12
#
13
# Everything else is
14
# Copyright © 2008,2009 Teddy Hogeborn
15
# Copyright © 2008,2009 Björn Påhlsson
16
#
17
# This program is free software: you can redistribute it and/or modify
18
# it under the terms of the GNU General Public License as published by
19
# the Free Software Foundation, either version 3 of the License, or
20
# (at your option) any later version.
21
#
22
# This program is distributed in the hope that it will be useful,
23
# but WITHOUT ANY WARRANTY; without even the implied warranty of
24
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
25
# GNU General Public License for more details.
26
#
27
# You should have received a copy of the GNU General Public License
28
# along with this program. If not, see
29
# <http://www.gnu.org/licenses/>.
30
#
31
# Contact the authors at <mandos@fukt.bsnet.se>.
32
#
33
34
from __future__ import division, with_statement, absolute_import
35
36
import SocketServer as socketserver
2
3
import SocketServer
37
4
import socket
38
import optparse
5
import select
6
from optparse import OptionParser
39
7
import datetime
40
8
import errno
41
9
import gnutls.crypto
42
10
import gnutls.connection
43
11
import gnutls.errors
44
import gnutls.library.functions
45
import gnutls.library.constants
46
import gnutls.library.types
47
import ConfigParser as configparser
12
import ConfigParser
48
13
import sys
49
import re
50
import os
51
import signal
52
import subprocess
53
import atexit
54
import stat
55
import logging
56
import logging.handlers
57
import pwd
58
from contextlib import closing
59
import struct
60
import fcntl
61
import functools
62
63
import dbus
64
import dbus.service
65
import gobject
66
import avahi
67
from dbus.mainloop.glib import DBusGMainLoop
68
import ctypes
69
import ctypes.util
70
71
try:
72
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
73
except AttributeError:
74
try:
75
from IN import SO_BINDTODEVICE
76
except ImportError:
77
SO_BINDTODEVICE = None
78
79
80
version = "1.0.12"
81
82
logger = logging.Logger(u'mandos')
83
syslogger = (logging.handlers.SysLogHandler
84
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
85
address = "/dev/log"))
86
syslogger.setFormatter(logging.Formatter
87
(u'Mandos [%(process)d]: %(levelname)s:'
88
u' %(message)s'))
89
logger.addHandler(syslogger)
90
91
console = logging.StreamHandler()
92
console.setFormatter(logging.Formatter(u'%(name)s [%(process)d]:'
93
u' %(levelname)s:'
94
u' %(message)s'))
95
logger.addHandler(console)
96
97
class AvahiError(Exception):
98
def __init__(self, value, *args, **kwargs):
99
self.value = value
100
super(AvahiError, self).__init__(value, *args, **kwargs)
101
def __unicode__(self):
102
return unicode(repr(self.value))
103
104
class AvahiServiceError(AvahiError):
105
pass
106
107
class AvahiGroupError(AvahiError):
108
pass
109
110
111
class AvahiService(object):
112
"""An Avahi (Zeroconf) service.
113
114
Attributes:
115
interface: integer; avahi.IF_UNSPEC or an interface index.
116
Used to optionally bind to the specified interface.
117
name: string; Example: u'Mandos'
118
type: string; Example: u'_mandos._tcp'.
119
See <http://www.dns-sd.org/ServiceTypes.html>
120
port: integer; what port to announce
121
TXT: list of strings; TXT record for the service
122
domain: string; Domain to publish on, default to .local if empty.
123
host: string; Host to publish records for, default is localhost
124
max_renames: integer; maximum number of renames
125
rename_count: integer; counter so we only rename after collisions
126
a sensible number of times
127
group: D-Bus Entry Group
128
server: D-Bus Server
129
bus: dbus.SystemBus()
130
"""
131
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
132
servicetype = None, port = None, TXT = None,
133
domain = u"", host = u"", max_renames = 32768,
134
protocol = avahi.PROTO_UNSPEC, bus = None):
135
self.interface = interface
136
self.name = name
137
self.type = servicetype
138
self.port = port
139
self.TXT = TXT if TXT is not None else []
140
self.domain = domain
141
self.host = host
142
self.rename_count = 0
143
self.max_renames = max_renames
144
self.protocol = protocol
145
self.group = None # our entry group
146
self.server = None
147
self.bus = bus
148
def rename(self):
149
"""Derived from the Avahi example code"""
150
if self.rename_count >= self.max_renames:
151
logger.critical(u"No suitable Zeroconf service name found"
152
u" after %i retries, exiting.",
153
self.rename_count)
154
raise AvahiServiceError(u"Too many renames")
155
self.name = self.server.GetAlternativeServiceName(self.name)
156
logger.info(u"Changing Zeroconf service name to %r ...",
157
unicode(self.name))
158
syslogger.setFormatter(logging.Formatter
159
(u'Mandos (%s) [%%(process)d]:'
160
u' %%(levelname)s: %%(message)s'
161
% self.name))
162
self.remove()
163
self.add()
164
self.rename_count += 1
165
def remove(self):
166
"""Derived from the Avahi example code"""
167
if self.group is not None:
168
self.group.Reset()
169
def add(self):
170
"""Derived from the Avahi example code"""
171
if self.group is None:
172
self.group = dbus.Interface(
173
self.bus.get_object(avahi.DBUS_NAME,
174
self.server.EntryGroupNew()),
175
avahi.DBUS_INTERFACE_ENTRY_GROUP)
176
self.group.connect_to_signal('StateChanged',
177
self
178
.entry_group_state_changed)
179
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
180
self.name, self.type)
181
self.group.AddService(
182
self.interface,
183
self.protocol,
184
dbus.UInt32(0), # flags
185
self.name, self.type,
186
self.domain, self.host,
187
dbus.UInt16(self.port),
188
avahi.string_array_to_txt_array(self.TXT))
189
self.group.Commit()
190
def entry_group_state_changed(self, state, error):
191
"""Derived from the Avahi example code"""
192
logger.debug(u"Avahi state change: %i", state)
193
194
if state == avahi.ENTRY_GROUP_ESTABLISHED:
195
logger.debug(u"Zeroconf service established.")
196
elif state == avahi.ENTRY_GROUP_COLLISION:
197
logger.warning(u"Zeroconf service name collision.")
198
self.rename()
199
elif state == avahi.ENTRY_GROUP_FAILURE:
200
logger.critical(u"Avahi: Error in group state changed %s",
201
unicode(error))
202
raise AvahiGroupError(u"State changed: %s"
203
% unicode(error))
204
def cleanup(self):
205
"""Derived from the Avahi example code"""
206
if self.group is not None:
207
self.group.Free()
208
self.group = None
209
def server_state_changed(self, state):
210
"""Derived from the Avahi example code"""
211
if state == avahi.SERVER_COLLISION:
212
logger.error(u"Zeroconf server name collision")
213
self.remove()
214
elif state == avahi.SERVER_RUNNING:
215
self.add()
216
def activate(self):
217
"""Derived from the Avahi example code"""
218
if self.server is None:
219
self.server = dbus.Interface(
220
self.bus.get_object(avahi.DBUS_NAME,
221
avahi.DBUS_PATH_SERVER),
222
avahi.DBUS_INTERFACE_SERVER)
223
self.server.connect_to_signal(u"StateChanged",
224
self.server_state_changed)
225
self.server_state_changed(self.server.GetState())
226
14
227
15
228
16
class Client(object):
229
"""A representation of a client host served by this server.
230
231
Attributes:
232
name: string; from the config file, used in log messages and
233
D-Bus identifiers
234
fingerprint: string (40 or 32 hexadecimal digits); used to
235
uniquely identify the client
236
secret: bytestring; sent verbatim (over TLS) to client
237
host: string; available for use by the checker command
238
created: datetime.datetime(); (UTC) object creation
239
last_enabled: datetime.datetime(); (UTC)
240
enabled: bool()
241
last_checked_ok: datetime.datetime(); (UTC) or None
242
timeout: datetime.timedelta(); How long from last_checked_ok
243
until this client is invalid
244
interval: datetime.timedelta(); How often to start a new checker
245
disable_hook: If set, called by disable() as disable_hook(self)
246
checker: subprocess.Popen(); a running checker process used
247
to see if the client lives.
248
'None' if no process is running.
249
checker_initiator_tag: a gobject event source tag, or None
250
disable_initiator_tag: - '' -
251
checker_callback_tag: - '' -
252
checker_command: string; External command which is run to check if
253
client lives. %() expansions are done at
254
runtime with vars(self) as dict, so that for
255
instance %(name)s can be used in the command.
256
current_checker_command: string; current running checker_command
257
"""
258
259
@staticmethod
260
def _datetime_to_milliseconds(dt):
261
"Convert a datetime.datetime() to milliseconds"
262
return ((dt.days * 24 * 60 * 60 * 1000)
263
+ (dt.seconds * 1000)
264
+ (dt.microseconds // 1000))
265
266
def timeout_milliseconds(self):
267
"Return the 'timeout' attribute in milliseconds"
268
return self._datetime_to_milliseconds(self.timeout)
269
270
def interval_milliseconds(self):
271
"Return the 'interval' attribute in milliseconds"
272
return self._datetime_to_milliseconds(self.interval)
273
274
def __init__(self, name = None, disable_hook=None, config=None):
275
"""Note: the 'checker' key in 'config' sets the
276
'checker_command' attribute and *not* the 'checker'
277
attribute."""
17
def __init__(self, name=None, options=None, dn=None,
18
password=None, passfile=None, fqdn=None,
19
timeout=None, interval=-1):
278
20
self.name = name
279
if config is None:
280
config = {}
281
logger.debug(u"Creating client %r", self.name)
282
# Uppercase and remove spaces from fingerprint for later
283
# comparison purposes with return value from the fingerprint()
284
# function
285
self.fingerprint = (config[u"fingerprint"].upper()
286
.replace(u" ", u""))
287
logger.debug(u" Fingerprint: %s", self.fingerprint)
288
if u"secret" in config:
289
self.secret = config[u"secret"].decode(u"base64")
290
elif u"secfile" in config:
291
with closing(open(os.path.expanduser
292
(os.path.expandvars
293
(config[u"secfile"])))) as secfile:
294
self.secret = secfile.read()
295
else:
296
raise TypeError(u"No secret or secfile for client %s"
297
% self.name)
298
self.host = config.get(u"host", u"")
299
self.created = datetime.datetime.utcnow()
300
self.enabled = False
301
self.last_enabled = None
302
self.last_checked_ok = None
303
self.timeout = string_to_delta(config[u"timeout"])
304
self.interval = string_to_delta(config[u"interval"])
305
self.disable_hook = disable_hook
306
self.checker = None
307
self.checker_initiator_tag = None
308
self.disable_initiator_tag = None
309
self.checker_callback_tag = None
310
self.checker_command = config[u"checker"]
311
self.current_checker_command = None
312
self.last_connect = None
313
314
def enable(self):
315
"""Start this client's checker and timeout hooks"""
316
if getattr(self, u"enabled", False):
317
# Already enabled
318
return
319
self.last_enabled = datetime.datetime.utcnow()
320
# Schedule a new checker to be started an 'interval' from now,
321
# and every interval from then on.
322
self.checker_initiator_tag = (gobject.timeout_add
323
(self.interval_milliseconds(),
324
self.start_checker))
325
# Also start a new checker *right now*.
326
self.start_checker()
327
# Schedule a disable() when 'timeout' has passed
328
self.disable_initiator_tag = (gobject.timeout_add
329
(self.timeout_milliseconds(),
330
self.disable))
331
self.enabled = True
332
333
def disable(self):
334
"""Disable this client."""
335
if not getattr(self, "enabled", False):
336
return False
337
logger.info(u"Disabling client %s", self.name)
338
if getattr(self, u"disable_initiator_tag", False):
339
gobject.source_remove(self.disable_initiator_tag)
340
self.disable_initiator_tag = None
341
if getattr(self, u"checker_initiator_tag", False):
342
gobject.source_remove(self.checker_initiator_tag)
343
self.checker_initiator_tag = None
344
self.stop_checker()
345
if self.disable_hook:
346
self.disable_hook(self)
347
self.enabled = False
348
# Do not run this again if called by a gobject.timeout_add
349
return False
350
351
def __del__(self):
352
self.disable_hook = None
353
self.disable()
354
355
def checker_callback(self, pid, condition, command):
356
"""The checker has completed, so take appropriate actions."""
357
self.checker_callback_tag = None
358
self.checker = None
359
if os.WIFEXITED(condition):
360
exitstatus = os.WEXITSTATUS(condition)
361
if exitstatus == 0:
362
logger.info(u"Checker for %(name)s succeeded",
363
vars(self))
364
self.checked_ok()
365
else:
366
logger.info(u"Checker for %(name)s failed",
367
vars(self))
368
else:
369
logger.warning(u"Checker for %(name)s crashed?",
370
vars(self))
371
372
def checked_ok(self):
373
"""Bump up the timeout for this client.
374
375
This should only be called when the client has been seen,
376
alive and well.
377
"""
378
self.last_checked_ok = datetime.datetime.utcnow()
379
gobject.source_remove(self.disable_initiator_tag)
380
self.disable_initiator_tag = (gobject.timeout_add
381
(self.timeout_milliseconds(),
382
self.disable))
383
384
def start_checker(self):
385
"""Start a new checker subprocess if one is not running.
386
387
If a checker already exists, leave it running and do
388
nothing."""
389
# The reason for not killing a running checker is that if we
390
# did that, then if a checker (for some reason) started
391
# running slowly and taking more than 'interval' time, the
392
# client would inevitably timeout, since no checker would get
393
# a chance to run to completion. If we instead leave running
394
# checkers alone, the checker would have to take more time
395
# than 'timeout' for the client to be declared invalid, which
396
# is as it should be.
397
398
# If a checker exists, make sure it is not a zombie
399
if self.checker is not None:
400
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
401
if pid:
402
logger.warning(u"Checker was a zombie")
403
gobject.source_remove(self.checker_callback_tag)
404
self.checker_callback(pid, status,
405
self.current_checker_command)
406
# Start a new checker if needed
407
if self.checker is None:
408
try:
409
# In case checker_command has exactly one % operator
410
command = self.checker_command % self.host
411
except TypeError:
412
# Escape attributes for the shell
413
escaped_attrs = dict((key,
414
re.escape(unicode(str(val),
415
errors=
416
u'replace')))
417
for key, val in
418
vars(self).iteritems())
419
try:
420
command = self.checker_command % escaped_attrs
421
except TypeError, error:
422
logger.error(u'Could not format string "%s":'
423
u' %s', self.checker_command, error)
424
return True # Try again later
425
self.current_checker_command = command
426
try:
427
logger.info(u"Starting checker %r for %s",
428
command, self.name)
429
# We don't need to redirect stdout and stderr, since
430
# in normal mode, that is already done by daemon(),
431
# and in debug mode we don't want to. (Stdin is
432
# always replaced by /dev/null.)
433
self.checker = subprocess.Popen(command,
434
close_fds=True,
435
shell=True, cwd=u"/")
436
self.checker_callback_tag = (gobject.child_watch_add
437
(self.checker.pid,
438
self.checker_callback,
439
data=command))
440
# The checker may have completed before the gobject
441
# watch was added. Check for this.
442
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
443
if pid:
444
gobject.source_remove(self.checker_callback_tag)
445
self.checker_callback(pid, status, command)
446
except OSError, error:
447
logger.error(u"Failed to start subprocess: %s",
448
error)
449
# Re-run this periodically if run by gobject.timeout_add
450
return True
451
452
def stop_checker(self):
453
"""Force the checker process, if any, to stop."""
454
if self.checker_callback_tag:
455
gobject.source_remove(self.checker_callback_tag)
456
self.checker_callback_tag = None
457
if getattr(self, u"checker", None) is None:
458
return
459
logger.debug(u"Stopping checker for %(name)s", vars(self))
460
try:
461
os.kill(self.checker.pid, signal.SIGTERM)
462
#os.sleep(0.5)
463
#if self.checker.poll() is None:
464
# os.kill(self.checker.pid, signal.SIGKILL)
465
except OSError, error:
466
if error.errno != errno.ESRCH: # No such process
467
raise
468
self.checker = None
469
470
def still_valid(self):
471
"""Has the timeout not yet passed for this client?"""
472
if not getattr(self, u"enabled", False):
473
return False
474
now = datetime.datetime.utcnow()
475
if self.last_checked_ok is None:
476
return now < (self.created + self.timeout)
477
else:
478
return now < (self.last_checked_ok + self.timeout)
479
480
481
class ClientDBus(Client, dbus.service.Object):
482
"""A Client class using D-Bus
483
484
Attributes:
485
dbus_object_path: dbus.ObjectPath
486
bus: dbus.SystemBus()
487
"""
488
# dbus.service.Object doesn't use super(), so we can't either.
489
490
def __init__(self, bus = None, *args, **kwargs):
491
self.bus = bus
492
Client.__init__(self, *args, **kwargs)
493
# Only now, when this client is initialized, can it show up on
494
# the D-Bus
495
self.dbus_object_path = (dbus.ObjectPath
496
(u"/clients/"
497
+ self.name.replace(u".", u"_")))
498
dbus.service.Object.__init__(self, self.bus,
499
self.dbus_object_path)
500
501
@staticmethod
502
def _datetime_to_dbus(dt, variant_level=0):
503
"""Convert a UTC datetime.datetime() to a D-Bus type."""
504
return dbus.String(dt.isoformat(),
505
variant_level=variant_level)
506
507
def enable(self):
508
oldstate = getattr(self, u"enabled", False)
509
r = Client.enable(self)
510
if oldstate != self.enabled:
511
# Emit D-Bus signals
512
self.PropertyChanged(dbus.String(u"enabled"),
513
dbus.Boolean(True, variant_level=1))
514
self.PropertyChanged(
515
dbus.String(u"last_enabled"),
516
self._datetime_to_dbus(self.last_enabled,
517
variant_level=1))
518
return r
519
520
def disable(self, signal = True):
521
oldstate = getattr(self, u"enabled", False)
522
r = Client.disable(self)
523
if signal and oldstate != self.enabled:
524
# Emit D-Bus signal
525
self.PropertyChanged(dbus.String(u"enabled"),
526
dbus.Boolean(False, variant_level=1))
527
return r
528
529
def __del__(self, *args, **kwargs):
530
try:
531
self.remove_from_connection()
532
except LookupError:
533
pass
534
if hasattr(dbus.service.Object, u"__del__"):
535
dbus.service.Object.__del__(self, *args, **kwargs)
536
Client.__del__(self, *args, **kwargs)
537
538
def checker_callback(self, pid, condition, command,
539
*args, **kwargs):
540
self.checker_callback_tag = None
541
self.checker = None
542
# Emit D-Bus signal
543
self.PropertyChanged(dbus.String(u"checker_running"),
544
dbus.Boolean(False, variant_level=1))
545
if os.WIFEXITED(condition):
546
exitstatus = os.WEXITSTATUS(condition)
547
# Emit D-Bus signal
548
self.CheckerCompleted(dbus.Int16(exitstatus),
549
dbus.Int64(condition),
550
dbus.String(command))
551
else:
552
# Emit D-Bus signal
553
self.CheckerCompleted(dbus.Int16(-1),
554
dbus.Int64(condition),
555
dbus.String(command))
556
557
return Client.checker_callback(self, pid, condition, command,
558
*args, **kwargs)
559
560
def checked_ok(self, *args, **kwargs):
561
r = Client.checked_ok(self, *args, **kwargs)
562
# Emit D-Bus signal
563
self.PropertyChanged(
564
dbus.String(u"last_checked_ok"),
565
(self._datetime_to_dbus(self.last_checked_ok,
566
variant_level=1)))
567
return r
568
569
def start_checker(self, *args, **kwargs):
570
old_checker = self.checker
571
if self.checker is not None:
572
old_checker_pid = self.checker.pid
573
else:
574
old_checker_pid = None
575
r = Client.start_checker(self, *args, **kwargs)
576
# Only if new checker process was started
577
if (self.checker is not None
578
and old_checker_pid != self.checker.pid):
579
# Emit D-Bus signal
580
self.CheckerStarted(self.current_checker_command)
581
self.PropertyChanged(
582
dbus.String(u"checker_running"),
583
dbus.Boolean(True, variant_level=1))
584
return r
585
586
def stop_checker(self, *args, **kwargs):
587
old_checker = getattr(self, u"checker", None)
588
r = Client.stop_checker(self, *args, **kwargs)
589
if (old_checker is not None
590
and getattr(self, u"checker", None) is None):
591
self.PropertyChanged(dbus.String(u"checker_running"),
592
dbus.Boolean(False, variant_level=1))
593
return r
594
595
## D-Bus methods & signals
596
_interface = u"se.bsnet.fukt.Mandos.Client"
597
598
# CheckedOK - method
599
@dbus.service.method(_interface)
600
def CheckedOK(self):
601
return self.checked_ok()
602
603
# CheckerCompleted - signal
604
@dbus.service.signal(_interface, signature=u"nxs")
605
def CheckerCompleted(self, exitcode, waitstatus, command):
606
"D-Bus signal"
607
pass
608
609
# CheckerStarted - signal
610
@dbus.service.signal(_interface, signature=u"s")
611
def CheckerStarted(self, command):
612
"D-Bus signal"
613
pass
614
615
# GetAllProperties - method
616
@dbus.service.method(_interface, out_signature=u"a{sv}")
617
def GetAllProperties(self):
618
"D-Bus method"
619
return dbus.Dictionary({
620
dbus.String(u"name"):
621
dbus.String(self.name, variant_level=1),
622
dbus.String(u"fingerprint"):
623
dbus.String(self.fingerprint, variant_level=1),
624
dbus.String(u"host"):
625
dbus.String(self.host, variant_level=1),
626
dbus.String(u"created"):
627
self._datetime_to_dbus(self.created,
628
variant_level=1),
629
dbus.String(u"last_enabled"):
630
(self._datetime_to_dbus(self.last_enabled,
631
variant_level=1)
632
if self.last_enabled is not None
633
else dbus.Boolean(False, variant_level=1)),
634
dbus.String(u"enabled"):
635
dbus.Boolean(self.enabled, variant_level=1),
636
dbus.String(u"last_checked_ok"):
637
(self._datetime_to_dbus(self.last_checked_ok,
638
variant_level=1)
639
if self.last_checked_ok is not None
640
else dbus.Boolean (False, variant_level=1)),
641
dbus.String(u"timeout"):
642
dbus.UInt64(self.timeout_milliseconds(),
643
variant_level=1),
644
dbus.String(u"interval"):
645
dbus.UInt64(self.interval_milliseconds(),
646
variant_level=1),
647
dbus.String(u"checker"):
648
dbus.String(self.checker_command,
649
variant_level=1),
650
dbus.String(u"checker_running"):
651
dbus.Boolean(self.checker is not None,
652
variant_level=1),
653
dbus.String(u"object_path"):
654
dbus.ObjectPath(self.dbus_object_path,
655
variant_level=1)
656
}, signature=u"sv")
657
658
# IsStillValid - method
659
@dbus.service.method(_interface, out_signature=u"b")
660
def IsStillValid(self):
661
return self.still_valid()
662
663
# PropertyChanged - signal
664
@dbus.service.signal(_interface, signature=u"sv")
665
def PropertyChanged(self, property, value):
666
"D-Bus signal"
667
pass
668
669
# ReceivedSecret - signal
670
@dbus.service.signal(_interface)
671
def ReceivedSecret(self):
672
"D-Bus signal"
673
pass
674
675
# Rejected - signal
676
@dbus.service.signal(_interface)
677
def Rejected(self):
678
"D-Bus signal"
679
pass
680
681
# SetChecker - method
682
@dbus.service.method(_interface, in_signature=u"s")
683
def SetChecker(self, checker):
684
"D-Bus setter method"
685
self.checker_command = checker
686
# Emit D-Bus signal
687
self.PropertyChanged(dbus.String(u"checker"),
688
dbus.String(self.checker_command,
689
variant_level=1))
690
691
# SetHost - method
692
@dbus.service.method(_interface, in_signature=u"s")
693
def SetHost(self, host):
694
"D-Bus setter method"
695
self.host = host
696
# Emit D-Bus signal
697
self.PropertyChanged(dbus.String(u"host"),
698
dbus.String(self.host, variant_level=1))
699
700
# SetInterval - method
701
@dbus.service.method(_interface, in_signature=u"t")
702
def SetInterval(self, milliseconds):
703
self.interval = datetime.timedelta(0, 0, 0, milliseconds)
704
# Emit D-Bus signal
705
self.PropertyChanged(dbus.String(u"interval"),
706
(dbus.UInt64(self
707
.interval_milliseconds(),
708
variant_level=1)))
709
710
# SetSecret - method
711
@dbus.service.method(_interface, in_signature=u"ay",
712
byte_arrays=True)
713
def SetSecret(self, secret):
714
"D-Bus setter method"
715
self.secret = str(secret)
716
717
# SetTimeout - method
718
@dbus.service.method(_interface, in_signature=u"t")
719
def SetTimeout(self, milliseconds):
720
self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
721
# Emit D-Bus signal
722
self.PropertyChanged(dbus.String(u"timeout"),
723
(dbus.UInt64(self.timeout_milliseconds(),
724
variant_level=1)))
725
726
# Enable - method
727
@dbus.service.method(_interface)
728
def Enable(self):
729
"D-Bus method"
730
self.enable()
731
732
# StartChecker - method
733
@dbus.service.method(_interface)
734
def StartChecker(self):
735
"D-Bus method"
736
self.start_checker()
737
738
# Disable - method
739
@dbus.service.method(_interface)
740
def Disable(self):
741
"D-Bus method"
742
self.disable()
743
744
# StopChecker - method
745
@dbus.service.method(_interface)
746
def StopChecker(self):
747
self.stop_checker()
748
749
del _interface
750
751
752
class ClientHandler(socketserver.BaseRequestHandler, object):
753
"""A class to handle client connections.
754
755
Instantiated once for each connection to handle it.
756
Note: This will run in its own forked process."""
757
758
def handle(self):
759
logger.info(u"TCP connection from: %s",
760
unicode(self.client_address))
761
logger.debug(u"IPC Pipe FD: %d", self.server.pipe[1])
762
# Open IPC pipe to parent process
763
with closing(os.fdopen(self.server.pipe[1], u"w", 1)) as ipc:
764
session = (gnutls.connection
765
.ClientSession(self.request,
766
gnutls.connection
767
.X509Credentials()))
768
769
line = self.request.makefile().readline()
770
logger.debug(u"Protocol version: %r", line)
771
try:
772
if int(line.strip().split()[0]) > 1:
773
raise RuntimeError
774
except (ValueError, IndexError, RuntimeError), error:
775
logger.error(u"Unknown protocol version: %s", error)
776
return
777
778
# Note: gnutls.connection.X509Credentials is really a
779
# generic GnuTLS certificate credentials object so long as
780
# no X.509 keys are added to it. Therefore, we can use it
781
# here despite using OpenPGP certificates.
782
783
#priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
784
# u"+AES-256-CBC", u"+SHA1",
785
# u"+COMP-NULL", u"+CTYPE-OPENPGP",
786
# u"+DHE-DSS"))
787
# Use a fallback default, since this MUST be set.
788
priority = self.server.gnutls_priority
789
if priority is None:
790
priority = u"NORMAL"
791
(gnutls.library.functions
792
.gnutls_priority_set_direct(session._c_object,
793
priority, None))
794
795
try:
796
session.handshake()
797
except gnutls.errors.GNUTLSError, error:
798
logger.warning(u"Handshake failed: %s", error)
799
# Do not run session.bye() here: the session is not
800
# established. Just abandon the request.
801
return
802
logger.debug(u"Handshake succeeded")
803
try:
804
fpr = self.fingerprint(self.peer_certificate(session))
805
except (TypeError, gnutls.errors.GNUTLSError), error:
806
logger.warning(u"Bad certificate: %s", error)
807
session.bye()
808
return
809
logger.debug(u"Fingerprint: %s", fpr)
810
811
for c in self.server.clients:
812
if c.fingerprint == fpr:
813
client = c
814
break
815
else:
816
ipc.write(u"NOTFOUND %s %s\n"
817
% (fpr, unicode(self.client_address)))
818
session.bye()
819
return
820
# Have to check if client.still_valid(), since it is
821
# possible that the client timed out while establishing
822
# the GnuTLS session.
823
if not client.still_valid():
824
ipc.write(u"INVALID %s\n" % client.name)
825
session.bye()
826
return
827
ipc.write(u"SENDING %s\n" % client.name)
828
sent_size = 0
829
while sent_size < len(client.secret):
830
sent = session.send(client.secret[sent_size:])
831
logger.debug(u"Sent: %d, remaining: %d",
832
sent, len(client.secret)
833
- (sent_size + sent))
834
sent_size += sent
835
session.bye()
836
837
@staticmethod
838
def peer_certificate(session):
839
"Return the peer's OpenPGP certificate as a bytestring"
840
# If not an OpenPGP certificate...
841
if (gnutls.library.functions
842
.gnutls_certificate_type_get(session._c_object)
843
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
844
# ...do the normal thing
845
return session.peer_certificate
846
list_size = ctypes.c_uint(1)
847
cert_list = (gnutls.library.functions
848
.gnutls_certificate_get_peers
849
(session._c_object, ctypes.byref(list_size)))
850
if not bool(cert_list) and list_size.value != 0:
851
raise gnutls.errors.GNUTLSError(u"error getting peer"
852
u" certificate")
853
if list_size.value == 0:
854
return None
855
cert = cert_list[0]
856
return ctypes.string_at(cert.data, cert.size)
857
858
@staticmethod
859
def fingerprint(openpgp):
860
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
861
# New GnuTLS "datum" with the OpenPGP public key
862
datum = (gnutls.library.types
863
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
864
ctypes.POINTER
865
(ctypes.c_ubyte)),
866
ctypes.c_uint(len(openpgp))))
867
# New empty GnuTLS certificate
868
crt = gnutls.library.types.gnutls_openpgp_crt_t()
869
(gnutls.library.functions
870
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
871
# Import the OpenPGP public key into the certificate
872
(gnutls.library.functions
873
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
874
gnutls.library.constants
875
.GNUTLS_OPENPGP_FMT_RAW))
876
# Verify the self signature in the key
877
crtverify = ctypes.c_uint()
878
(gnutls.library.functions
879
.gnutls_openpgp_crt_verify_self(crt, 0,
880
ctypes.byref(crtverify)))
881
if crtverify.value != 0:
882
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
883
raise (gnutls.errors.CertificateSecurityError
884
(u"Verify failed"))
885
# New buffer for the fingerprint
886
buf = ctypes.create_string_buffer(20)
887
buf_len = ctypes.c_size_t()
888
# Get the fingerprint from the certificate into the buffer
889
(gnutls.library.functions
890
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
891
ctypes.byref(buf_len)))
892
# Deinit the certificate
893
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
894
# Convert the buffer to a Python bytestring
895
fpr = ctypes.string_at(buf, buf_len.value)
896
# Convert the bytestring to hexadecimal notation
897
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
898
return hex_fpr
899
900
901
class ForkingMixInWithPipe(socketserver.ForkingMixIn, object):
902
"""Like socketserver.ForkingMixIn, but also pass a pipe."""
903
def process_request(self, request, client_address):
904
"""Overrides and wraps the original process_request().
905
906
This function creates a new pipe in self.pipe
907
"""
908
self.pipe = os.pipe()
909
super(ForkingMixInWithPipe,
910
self).process_request(request, client_address)
911
os.close(self.pipe[1]) # close write end
912
self.add_pipe(self.pipe[0])
913
def add_pipe(self, pipe):
914
"""Dummy function; override as necessary"""
915
os.close(pipe)
916
917
918
class IPv6_TCPServer(ForkingMixInWithPipe,
919
socketserver.TCPServer, object):
920
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
921
922
Attributes:
923
enabled: Boolean; whether this server is activated yet
924
interface: None or a network interface name (string)
925
use_ipv6: Boolean; to use IPv6 or not
926
"""
927
def __init__(self, server_address, RequestHandlerClass,
928
interface=None, use_ipv6=True):
929
self.interface = interface
930
if use_ipv6:
931
self.address_family = socket.AF_INET6
932
socketserver.TCPServer.__init__(self, server_address,
933
RequestHandlerClass)
934
def server_bind(self):
935
"""This overrides the normal server_bind() function
936
to bind to an interface if one was specified, and also NOT to
937
bind to an address or port if they were not specified."""
938
if self.interface is not None:
939
if SO_BINDTODEVICE is None:
940
logger.error(u"SO_BINDTODEVICE does not exist;"
941
u" cannot bind to interface %s",
942
self.interface)
943
else:
21
self.dn = dn
22
if password:
23
self.password = password
24
elif passfile:
25
self.password = open(passfile).readall()
26
else:
27
print "No Password or Passfile in client config file"
28
# raise RuntimeError XXX
29
self.password = "gazonk"
30
self.fqdn = fqdn
31
self.created = datetime.datetime.now()
32
self.last_seen = None
33
if timeout is None:
34
timeout = options.timeout
35
self.timeout = timeout
36
if interval == -1:
37
interval = options.interval
38
self.interval = interval
39
self.next_check = datetime.datetime.now()
40
41
42
class server_metaclass(type):
43
"Common behavior for the UDP and TCP server classes"
44
def __new__(cls, name, bases, attrs):
45
attrs["address_family"] = socket.AF_INET6
46
attrs["allow_reuse_address"] = True
47
def server_bind(self):
48
if self.options.interface:
49
if not hasattr(socket, "SO_BINDTODEVICE"):
50
# From /usr/include/asm-i486/socket.h
51
socket.SO_BINDTODEVICE = 25
944
52
try:
945
53
self.socket.setsockopt(socket.SOL_SOCKET,
946
SO_BINDTODEVICE,
947
str(self.interface
948
+ u'\0'))
54
socket.SO_BINDTODEVICE,
55
self.options.interface)
949
56
except socket.error, error:
950
57
if error[0] == errno.EPERM:
951
logger.error(u"No permission to"
952
u" bind to interface %s",
953
self.interface)
954
elif error[0] == errno.ENOPROTOOPT:
955
logger.error(u"SO_BINDTODEVICE not available;"
956
u" cannot bind to interface %s",
957
self.interface)
58
print "Warning: No permission to bind to interface", \
59
self.options.interface
958
60
else:
959
raise
960
# Only bind(2) the socket if we really need to.
961
if self.server_address[0] or self.server_address[1]:
962
if not self.server_address[0]:
963
if self.address_family == socket.AF_INET6:
964
any_address = u"::" # in6addr_any
965
else:
966
any_address = socket.INADDR_ANY
967
self.server_address = (any_address,
968
self.server_address[1])
969
elif not self.server_address[1]:
970
self.server_address = (self.server_address[0],
971
0)
972
# if self.interface:
973
# self.server_address = (self.server_address[0],
974
# 0, # port
975
# 0, # flowinfo
976
# if_nametoindex
977
# (self.interface))
978
return socketserver.TCPServer.server_bind(self)
979
980
981
class MandosServer(IPv6_TCPServer):
982
"""Mandos server.
983
984
Attributes:
985
clients: set of Client objects
986
gnutls_priority GnuTLS priority string
987
use_dbus: Boolean; to emit D-Bus signals or not
988
989
Assumes a gobject.MainLoop event loop.
990
"""
991
def __init__(self, server_address, RequestHandlerClass,
992
interface=None, use_ipv6=True, clients=None,
993
gnutls_priority=None, use_dbus=True):
994
self.enabled = False
995
self.clients = clients
996
if self.clients is None:
997
self.clients = set()
998
self.use_dbus = use_dbus
999
self.gnutls_priority = gnutls_priority
1000
IPv6_TCPServer.__init__(self, server_address,
1001
RequestHandlerClass,
1002
interface = interface,
1003
use_ipv6 = use_ipv6)
1004
def server_activate(self):
1005
if self.enabled:
1006
return socketserver.TCPServer.server_activate(self)
1007
def enable(self):
1008
self.enabled = True
1009
def add_pipe(self, pipe):
1010
# Call "handle_ipc" for both data and EOF events
1011
gobject.io_add_watch(pipe, gobject.IO_IN | gobject.IO_HUP,
1012
self.handle_ipc)
1013
def handle_ipc(self, source, condition, file_objects={}):
1014
condition_names = {
1015
gobject.IO_IN: u"IN", # There is data to read.
1016
gobject.IO_OUT: u"OUT", # Data can be written (without
1017
# blocking).
1018
gobject.IO_PRI: u"PRI", # There is urgent data to read.
1019
gobject.IO_ERR: u"ERR", # Error condition.
1020
gobject.IO_HUP: u"HUP" # Hung up (the connection has been
1021
# broken, usually for pipes and
1022
# sockets).
1023
}
1024
conditions_string = ' | '.join(name
1025
for cond, name in
1026
condition_names.iteritems()
1027
if cond & condition)
1028
logger.debug(u"Handling IPC: FD = %d, condition = %s", source,
1029
conditions_string)
1030
1031
# Turn the pipe file descriptor into a Python file object
1032
if source not in file_objects:
1033
file_objects[source] = os.fdopen(source, u"r", 1)
1034
1035
# Read a line from the file object
1036
cmdline = file_objects[source].readline()
1037
if not cmdline: # Empty line means end of file
1038
# close the IPC pipe
1039
file_objects[source].close()
1040
del file_objects[source]
1041
1042
# Stop calling this function
1043
return False
1044
1045
logger.debug(u"IPC command: %r", cmdline)
1046
1047
# Parse and act on command
1048
cmd, args = cmdline.rstrip(u"\r\n").split(None, 1)
1049
1050
if cmd == u"NOTFOUND":
1051
logger.warning(u"Client not found for fingerprint: %s",
1052
args)
1053
if self.use_dbus:
1054
# Emit D-Bus signal
1055
mandos_dbus_service.ClientNotFound(args)
1056
elif cmd == u"INVALID":
1057
for client in self.clients:
1058
if client.name == args:
1059
logger.warning(u"Client %s is invalid", args)
1060
if self.use_dbus:
1061
# Emit D-Bus signal
1062
client.Rejected()
1063
break
1064
else:
1065
logger.error(u"Unknown client %s is invalid", args)
1066
elif cmd == u"SENDING":
1067
for client in self.clients:
1068
if client.name == args:
1069
logger.info(u"Sending secret to %s", client.name)
1070
client.checked_ok()
1071
if self.use_dbus:
1072
# Emit D-Bus signal
1073
client.ReceivedSecret()
1074
break
1075
else:
1076
logger.error(u"Sending secret to unknown client %s",
1077
args)
1078
else:
1079
logger.error(u"Unknown IPC command: %r", cmdline)
1080
1081
# Keep calling this function
1082
return True
1083
61
raise error
62
return super(type(self), self).server_bind()
63
attrs["server_bind"] = server_bind
64
def init(self, *args, **kwargs):
65
if "options" in kwargs:
66
self.options = kwargs["options"]
67
del kwargs["options"]
68
if "clients" in kwargs:
69
self.clients = kwargs["clients"]
70
del kwargs["clients"]
71
if "credentials" in kwargs:
72
self.credentials = kwargs["credentials"]
73
del kwargs["credentials"]
74
return super(type(self), self).__init__(*args, **kwargs)
75
attrs["__init__"] = init
76
return type.__new__(cls, name, bases, attrs)
77
78
79
class udp_handler(SocketServer.DatagramRequestHandler, object):
80
def handle(self):
81
self.wfile.write("Polo")
82
print "UDP request answered"
83
84
85
class IPv6_UDPServer(SocketServer.UDPServer, object):
86
__metaclass__ = server_metaclass
87
def verify_request(self, request, client_address):
88
print "UDP request came"
89
return request[0] == "Marco"
90
91
92
class tcp_handler(SocketServer.BaseRequestHandler, object):
93
def handle(self):
94
print "TCP request came"
95
print "Request:", self.request
96
print "Client Address:", self.client_address
97
print "Server:", self.server
98
session = gnutls.connection.ServerSession(self.request,
99
self.server.credentials)
100
session.handshake()
101
if session.peer_certificate:
102
print "DN:", session.peer_certificate.subject
103
try:
104
session.verify_peer()
105
except gnutls.errors.CertificateError, error:
106
print "Verify failed", error
107
session.bye()
108
return
109
try:
110
session.send(dict((client.dn, client.password)
111
for client in self.server.clients)
112
[session.peer_certificate.subject])
113
except KeyError:
114
session.send("gazonk")
115
# Log maybe? XXX
116
session.bye()
117
118
119
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
120
__metaclass__ = server_metaclass
121
request_queue_size = 1024
122
123
124
in6addr_any = "::"
125
126
cred = None
1084
127
1085
128
def string_to_delta(interval):
1086
129
"""Parse a string and return a datetime.timedelta
1087
1088
>>> string_to_delta(u'7d')
130
131
>>> string_to_delta('7d')
1089
132
datetime.timedelta(7)
1090
>>> string_to_delta(u'60s')
133
>>> string_to_delta('60s')
1091
134
datetime.timedelta(0, 60)
1092
>>> string_to_delta(u'60m')
135
>>> string_to_delta('60m')
1093
136
datetime.timedelta(0, 3600)
1094
>>> string_to_delta(u'24h')
137
>>> string_to_delta('24h')
1095
138
datetime.timedelta(1)
1096
139
>>> string_to_delta(u'1w')
1097
140
datetime.timedelta(7)
1098
>>> string_to_delta(u'5m 30s')
1099
datetime.timedelta(0, 330)
1100
141
"""
1101
timevalue = datetime.timedelta(0)
1102
for s in interval.split():
1103
try:
1104
suffix = unicode(s[-1])
1105
value = int(s[:-1])
1106
if suffix == u"d":
1107
delta = datetime.timedelta(value)
1108
elif suffix == u"s":
1109
delta = datetime.timedelta(0, value)
1110
elif suffix == u"m":
1111
delta = datetime.timedelta(0, 0, 0, 0, value)
1112
elif suffix == u"h":
1113
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
1114
elif suffix == u"w":
1115
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1116
else:
1117
raise ValueError
1118
except (ValueError, IndexError):
142
try:
143
suffix=unicode(interval[-1])
144
value=int(interval[:-1])
145
if suffix == u"d":
146
delta = datetime.timedelta(value)
147
elif suffix == u"s":
148
delta = datetime.timedelta(0, value)
149
elif suffix == u"m":
150
delta = datetime.timedelta(0, 0, 0, 0, value)
151
elif suffix == u"h":
152
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
153
elif suffix == u"w":
154
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
155
else:
1119
156
raise ValueError
1120
timevalue += delta
1121
return timevalue
1122
1123
1124
def if_nametoindex(interface):
1125
"""Call the C function if_nametoindex(), or equivalent
1126
1127
Note: This function cannot accept a unicode string."""
1128
global if_nametoindex
1129
try:
1130
if_nametoindex = (ctypes.cdll.LoadLibrary
1131
(ctypes.util.find_library(u"c"))
1132
.if_nametoindex)
1133
except (OSError, AttributeError):
1134
logger.warning(u"Doing if_nametoindex the hard way")
1135
def if_nametoindex(interface):
1136
"Get an interface index the hard way, i.e. using fcntl()"
1137
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1138
with closing(socket.socket()) as s:
1139
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1140
struct.pack(str(u"16s16x"),
1141
interface))
1142
interface_index = struct.unpack(str(u"I"),
1143
ifreq[16:20])[0]
1144
return interface_index
1145
return if_nametoindex(interface)
1146
1147
1148
def daemon(nochdir = False, noclose = False):
1149
"""See daemon(3). Standard BSD Unix function.
1150
1151
This should really exist as os.daemon, but it doesn't (yet)."""
1152
if os.fork():
1153
sys.exit()
1154
os.setsid()
1155
if not nochdir:
1156
os.chdir(u"/")
1157
if os.fork():
1158
sys.exit()
1159
if not noclose:
1160
# Close all standard open file descriptors
1161
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1162
if not stat.S_ISCHR(os.fstat(null).st_mode):
1163
raise OSError(errno.ENODEV,
1164
u"/dev/null not a character device")
1165
os.dup2(null, sys.stdin.fileno())
1166
os.dup2(null, sys.stdout.fileno())
1167
os.dup2(null, sys.stderr.fileno())
1168
if null > 2:
1169
os.close(null)
1170
157
except (ValueError, IndexError):
158
raise ValueError
159
return delta
1171
160
1172
161
def main():
1173
1174
##################################################################
1175
# Parsing of options, both command line and config file
1176
1177
parser = optparse.OptionParser(version = "%%prog %s" % version)
1178
parser.add_option("-i", u"--interface", type=u"string",
1179
metavar="IF", help=u"Bind to interface IF")
1180
parser.add_option("-a", u"--address", type=u"string",
1181
help=u"Address to listen for requests on")
1182
parser.add_option("-p", u"--port", type=u"int",
1183
help=u"Port number to receive requests on")
1184
parser.add_option("--check", action=u"store_true",
1185
help=u"Run self-test")
1186
parser.add_option("--debug", action=u"store_true",
1187
help=u"Debug mode; run in foreground and log to"
1188
u" terminal")
1189
parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1190
u" priority string (see GnuTLS documentation)")
1191
parser.add_option("--servicename", type=u"string",
1192
metavar=u"NAME", help=u"Zeroconf service name")
1193
parser.add_option("--configdir", type=u"string",
1194
default=u"/etc/mandos", metavar=u"DIR",
1195
help=u"Directory to search for configuration"
1196
u" files")
1197
parser.add_option("--no-dbus", action=u"store_false",
1198
dest=u"use_dbus", help=u"Do not provide D-Bus"
1199
u" system bus interface")
1200
parser.add_option("--no-ipv6", action=u"store_false",
1201
dest=u"use_ipv6", help=u"Do not use IPv6")
1202
options = parser.parse_args()[0]
1203
162
parser = OptionParser()
163
parser.add_option("-i", "--interface", type="string",
164
default="eth0", metavar="IF",
165
help="Interface to bind to")
166
parser.add_option("--cert", type="string", default="cert.pem",
167
metavar="FILE",
168
help="Public key certificate to use")
169
parser.add_option("--key", type="string", default="key.pem",
170
metavar="FILE",
171
help="Private key to use")
172
parser.add_option("--ca", type="string", default="ca.pem",
173
metavar="FILE",
174
help="Certificate Authority certificate to use")
175
parser.add_option("--crl", type="string", default="crl.pem",
176
metavar="FILE",
177
help="Certificate Revokation List to use")
178
parser.add_option("-p", "--port", type="int", default=49001,
179
help="Port number to receive requests on")
180
parser.add_option("--dh", type="int", metavar="BITS",
181
help="DH group to use")
182
parser.add_option("-t", "--timeout", type="string", # Parsed later
183
default="15m",
184
help="Amount of downtime allowed for clients")
185
parser.add_option("--interval", type="string", # Parsed later
186
default="5m",
187
help="How often to check that a client is up")
188
parser.add_option("--check", action="store_true", default=False,
189
help="Run self-test")
190
(options, args) = parser.parse_args()
191
1204
192
if options.check:
1205
193
import doctest
1206
194
doctest.testmod()
1207
195
sys.exit()
1208
196
1209
# Default values for config file for server-global settings
1210
server_defaults = { u"interface": u"",
1211
u"address": u"",
1212
u"port": u"",
1213
u"debug": u"False",
1214
u"priority":
1215
u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1216
u"servicename": u"Mandos",
1217
u"use_dbus": u"True",
1218
u"use_ipv6": u"True",
1219
}
1220
1221
# Parse config file for server-global settings
1222
server_config = configparser.SafeConfigParser(server_defaults)
1223
del server_defaults
1224
server_config.read(os.path.join(options.configdir,
1225
u"mandos.conf"))
1226
# Convert the SafeConfigParser object to a dict
1227
server_settings = server_config.defaults()
1228
# Use the appropriate methods on the non-string config options
1229
for option in (u"debug", u"use_dbus", u"use_ipv6"):
1230
server_settings[option] = server_config.getboolean(u"DEFAULT",
1231
option)
1232
if server_settings["port"]:
1233
server_settings["port"] = server_config.getint(u"DEFAULT",
1234
u"port")
1235
del server_config
1236
1237
# Override the settings from the config file with command line
1238
# options, if set.
1239
for option in (u"interface", u"address", u"port", u"debug",
1240
u"priority", u"servicename", u"configdir",
1241
u"use_dbus", u"use_ipv6"):
1242
value = getattr(options, option)
1243
if value is not None:
1244
server_settings[option] = value
1245
del options
1246
# Force all strings to be unicode
1247
for option in server_settings.keys():
1248
if type(server_settings[option]) is str:
1249
server_settings[option] = unicode(server_settings[option])
1250
# Now we have our good server settings in "server_settings"
1251
1252
##################################################################
1253
1254
# For convenience
1255
debug = server_settings[u"debug"]
1256
use_dbus = server_settings[u"use_dbus"]
1257
use_ipv6 = server_settings[u"use_ipv6"]
1258
1259
if not debug:
1260
syslogger.setLevel(logging.WARNING)
1261
console.setLevel(logging.WARNING)
1262
1263
if server_settings[u"servicename"] != u"Mandos":
1264
syslogger.setFormatter(logging.Formatter
1265
(u'Mandos (%s) [%%(process)d]:'
1266
u' %%(levelname)s: %%(message)s'
1267
% server_settings[u"servicename"]))
1268
1269
# Parse config file with clients
1270
client_defaults = { u"timeout": u"1h",
1271
u"interval": u"5m",
1272
u"checker": u"fping -q -- %%(host)s",
1273
u"host": u"",
1274
}
1275
client_config = configparser.SafeConfigParser(client_defaults)
1276
client_config.read(os.path.join(server_settings[u"configdir"],
1277
u"clients.conf"))
1278
1279
global mandos_dbus_service
1280
mandos_dbus_service = None
1281
1282
tcp_server = MandosServer((server_settings[u"address"],
1283
server_settings[u"port"]),
1284
ClientHandler,
1285
interface=server_settings[u"interface"],
1286
use_ipv6=use_ipv6,
1287
gnutls_priority=
1288
server_settings[u"priority"],
1289
use_dbus=use_dbus)
1290
pidfilename = u"/var/run/mandos.pid"
1291
try:
1292
pidfile = open(pidfilename, u"w")
1293
except IOError:
1294
logger.error(u"Could not open file %r", pidfilename)
1295
1296
try:
1297
uid = pwd.getpwnam(u"_mandos").pw_uid
1298
gid = pwd.getpwnam(u"_mandos").pw_gid
1299
except KeyError:
1300
try:
1301
uid = pwd.getpwnam(u"mandos").pw_uid
1302
gid = pwd.getpwnam(u"mandos").pw_gid
1303
except KeyError:
1304
try:
1305
uid = pwd.getpwnam(u"nobody").pw_uid
1306
gid = pwd.getpwnam(u"nobody").pw_gid
1307
except KeyError:
1308
uid = 65534
1309
gid = 65534
1310
try:
1311
os.setgid(gid)
1312
os.setuid(uid)
1313
except OSError, error:
1314
if error[0] != errno.EPERM:
1315
raise error
1316
1317
# Enable all possible GnuTLS debugging
1318
if debug:
1319
# "Use a log level over 10 to enable all debugging options."
1320
# - GnuTLS manual
1321
gnutls.library.functions.gnutls_global_set_log_level(11)
1322
1323
@gnutls.library.types.gnutls_log_func
1324
def debug_gnutls(level, string):
1325
logger.debug(u"GnuTLS: %s", string[:-1])
1326
1327
(gnutls.library.functions
1328
.gnutls_global_set_log_function(debug_gnutls))
1329
1330
global main_loop
1331
# From the Avahi example code
1332
DBusGMainLoop(set_as_default=True )
1333
main_loop = gobject.MainLoop()
1334
bus = dbus.SystemBus()
1335
# End of Avahi example code
1336
if use_dbus:
1337
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
1338
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1339
service = AvahiService(name = server_settings[u"servicename"],
1340
servicetype = u"_mandos._tcp",
1341
protocol = protocol, bus = bus)
1342
if server_settings["interface"]:
1343
service.interface = (if_nametoindex
1344
(str(server_settings[u"interface"])))
1345
1346
client_class = Client
1347
if use_dbus:
1348
client_class = functools.partial(ClientDBus, bus = bus)
1349
tcp_server.clients.update(set(
1350
client_class(name = section,
1351
config= dict(client_config.items(section)))
1352
for section in client_config.sections()))
1353
if not tcp_server.clients:
1354
logger.warning(u"No clients defined")
1355
1356
if debug:
1357
# Redirect stdin so all checkers get /dev/null
1358
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1359
os.dup2(null, sys.stdin.fileno())
1360
if null > 2:
1361
os.close(null)
1362
else:
1363
# No console logging
1364
logger.removeHandler(console)
1365
# Close all input and output, do double fork, etc.
1366
daemon()
1367
1368
try:
1369
with closing(pidfile):
1370
pid = os.getpid()
1371
pidfile.write(str(pid) + "\n")
1372
del pidfile
1373
except IOError:
1374
logger.error(u"Could not write to file %r with PID %d",
1375
pidfilename, pid)
1376
except NameError:
1377
# "pidfile" was never created
1378
pass
1379
del pidfilename
1380
1381
def cleanup():
1382
"Cleanup function; run on exit"
1383
service.cleanup()
1384
1385
while tcp_server.clients:
1386
client = tcp_server.clients.pop()
1387
client.disable_hook = None
1388
client.disable()
1389
1390
atexit.register(cleanup)
1391
1392
if not debug:
1393
signal.signal(signal.SIGINT, signal.SIG_IGN)
1394
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1395
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1396
1397
if use_dbus:
1398
class MandosDBusService(dbus.service.Object):
1399
"""A D-Bus proxy object"""
1400
def __init__(self):
1401
dbus.service.Object.__init__(self, bus, u"/")
1402
_interface = u"se.bsnet.fukt.Mandos"
1403
1404
@dbus.service.signal(_interface, signature=u"oa{sv}")
1405
def ClientAdded(self, objpath, properties):
1406
"D-Bus signal"
1407
pass
1408
1409
@dbus.service.signal(_interface, signature=u"s")
1410
def ClientNotFound(self, fingerprint):
1411
"D-Bus signal"
1412
pass
1413
1414
@dbus.service.signal(_interface, signature=u"os")
1415
def ClientRemoved(self, objpath, name):
1416
"D-Bus signal"
1417
pass
1418
1419
@dbus.service.method(_interface, out_signature=u"ao")
1420
def GetAllClients(self):
1421
"D-Bus method"
1422
return dbus.Array(c.dbus_object_path
1423
for c in tcp_server.clients)
1424
1425
@dbus.service.method(_interface,
1426
out_signature=u"a{oa{sv}}")
1427
def GetAllClientsWithProperties(self):
1428
"D-Bus method"
1429
return dbus.Dictionary(
1430
((c.dbus_object_path, c.GetAllProperties())
1431
for c in tcp_server.clients),
1432
signature=u"oa{sv}")
1433
1434
@dbus.service.method(_interface, in_signature=u"o")
1435
def RemoveClient(self, object_path):
1436
"D-Bus method"
1437
for c in tcp_server.clients:
1438
if c.dbus_object_path == object_path:
1439
tcp_server.clients.remove(c)
1440
c.remove_from_connection()
1441
# Don't signal anything except ClientRemoved
1442
c.disable(signal=False)
1443
# Emit D-Bus signal
1444
self.ClientRemoved(object_path, c.name)
1445
return
1446
raise KeyError
1447
1448
del _interface
1449
1450
mandos_dbus_service = MandosDBusService()
1451
1452
for client in tcp_server.clients:
1453
if use_dbus:
1454
# Emit D-Bus signal
1455
mandos_dbus_service.ClientAdded(client.dbus_object_path,
1456
client.GetAllProperties())
1457
client.enable()
1458
1459
tcp_server.enable()
1460
tcp_server.server_activate()
1461
1462
# Find out what port we got
1463
service.port = tcp_server.socket.getsockname()[1]
1464
if use_ipv6:
1465
logger.info(u"Now listening on address %r, port %d,"
1466
" flowinfo %d, scope_id %d"
1467
% tcp_server.socket.getsockname())
1468
else: # IPv4
1469
logger.info(u"Now listening on address %r, port %d"
1470
% tcp_server.socket.getsockname())
1471
1472
#service.interface = tcp_server.socket.getsockname()[3]
1473
1474
try:
1475
# From the Avahi example code
1476
try:
1477
service.activate()
1478
except dbus.exceptions.DBusException, error:
1479
logger.critical(u"DBusException: %s", error)
1480
sys.exit(1)
1481
# End of Avahi example code
1482
1483
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
1484
lambda *args, **kwargs:
1485
(tcp_server.handle_request
1486
(*args[2:], **kwargs) or True))
1487
1488
logger.debug(u"Starting main loop")
1489
main_loop.run()
1490
except AvahiError, error:
1491
logger.critical(u"AvahiError: %s", error)
1492
sys.exit(1)
1493
except KeyboardInterrupt:
1494
if debug:
1495
print >> sys.stderr
1496
logger.debug(u"Server received KeyboardInterrupt")
1497
logger.debug(u"Server exiting")
1498
1499
if __name__ == '__main__':
197
# Parse the time arguments
198
try:
199
options.timeout = string_to_delta(options.timeout)
200
except ValueError:
201
parser.error("option --timeout: Unparseable time")
202
203
try:
204
options.interval = string_to_delta(options.interval)
205
except ValueError:
206
parser.error("option --interval: Unparseable time")
207
208
cert = gnutls.crypto.X509Certificate(open(options.cert).read())
209
key = gnutls.crypto.X509PrivateKey(open(options.key).read())
210
ca = gnutls.crypto.X509Certificate(open(options.ca).read())
211
crl = gnutls.crypto.X509CRL(open(options.crl).read())
212
cred = gnutls.connection.X509Credentials(cert, key, [ca], [crl])
213
214
# Parse config file
215
defaults = {}
216
client_config_object = ConfigParser.SafeConfigParser(defaults)
217
client_config_object.read("mandos-clients.conf")
218
clients = [Client(name=section, options=options,
219
**(dict(client_config_object.items(section))))
220
for section in client_config_object.sections()]
221
222
udp_server = IPv6_UDPServer((in6addr_any, options.port),
223
udp_handler,
224
options=options)
225
226
tcp_server = IPv6_TCPServer((in6addr_any, options.port),
227
tcp_handler,
228
options=options,
229
clients=clients,
230
credentials=cred)
231
232
while True:
233
in_, out, err = select.select((udp_server,
234
tcp_server), (), ())
235
for server in in_:
236
server.handle_request()
237
238
239
if __name__ == "__main__":
1500
240
main()
241
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0