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- Committer: Teddy Hogeborn
- Date: 2008-01-30 17:28:18 UTC
- Revision ID: teddy@fukt.bsnet.se-20080130172818-fnrq2xmtg1wa8wo2
* client.cpp (main): Get t_old early since it is used on error exits.
* server.py (Client.checker): New attribute.
(Client.check_action, Client.start_checker, Client.stop_checker,
Client.fileno, Client.next_stop, Client.still_valid,
Client.it_is_time_to_check): New methods.
(Client.handle_request): Alias to "check_action".
(main): Stop all started checkers on exit. Exit cleanly on keyboard
interrupt.
* server.py (Client.checker): New attribute.
(Client.check_action, Client.start_checker, Client.stop_checker,
Client.fileno, Client.next_stop, Client.still_valid,
Client.it_is_time_to_check): New methods.
(Client.handle_request): Alias to "check_action".
(main): Stop all started checkers on exit. Exit cleanly on keyboard
interrupt.
- 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
14
import re
50
15
import os
51
16
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.entry_group_state_changed)
178
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
179
self.name, self.type)
180
self.group.AddService(
181
self.interface,
182
self.protocol,
183
dbus.UInt32(0), # flags
184
self.name, self.type,
185
self.domain, self.host,
186
dbus.UInt16(self.port),
187
avahi.string_array_to_txt_array(self.TXT))
188
self.group.Commit()
189
def entry_group_state_changed(self, state, error):
190
"""Derived from the Avahi example code"""
191
logger.debug(u"Avahi state change: %i", state)
192
193
if state == avahi.ENTRY_GROUP_ESTABLISHED:
194
logger.debug(u"Zeroconf service established.")
195
elif state == avahi.ENTRY_GROUP_COLLISION:
196
logger.warning(u"Zeroconf service name collision.")
197
self.rename()
198
elif state == avahi.ENTRY_GROUP_FAILURE:
199
logger.critical(u"Avahi: Error in group state changed %s",
200
unicode(error))
201
raise AvahiGroupError(u"State changed: %s"
202
% unicode(error))
203
def cleanup(self):
204
"""Derived from the Avahi example code"""
205
if self.group is not None:
206
self.group.Free()
207
self.group = None
208
def server_state_changed(self, state):
209
"""Derived from the Avahi example code"""
210
if state == avahi.SERVER_COLLISION:
211
logger.error(u"Zeroconf server name collision")
212
self.remove()
213
elif state == avahi.SERVER_RUNNING:
214
self.add()
215
def activate(self):
216
"""Derived from the Avahi example code"""
217
if self.server is None:
218
self.server = dbus.Interface(
219
self.bus.get_object(avahi.DBUS_NAME,
220
avahi.DBUS_PATH_SERVER),
221
avahi.DBUS_INTERFACE_SERVER)
222
self.server.connect_to_signal(u"StateChanged",
223
self.server_state_changed)
224
self.server_state_changed(self.server.GetState())
225
226
17
227
18
class Client(object):
228
"""A representation of a client host served by this server.
229
230
Attributes:
231
name: string; from the config file, used in log messages and
232
D-Bus identifiers
233
fingerprint: string (40 or 32 hexadecimal digits); used to
234
uniquely identify the client
235
secret: bytestring; sent verbatim (over TLS) to client
236
host: string; available for use by the checker command
237
created: datetime.datetime(); (UTC) object creation
238
last_enabled: datetime.datetime(); (UTC)
239
enabled: bool()
240
last_checked_ok: datetime.datetime(); (UTC) or None
241
timeout: datetime.timedelta(); How long from last_checked_ok
242
until this client is invalid
243
interval: datetime.timedelta(); How often to start a new checker
244
disable_hook: If set, called by disable() as disable_hook(self)
245
checker: subprocess.Popen(); a running checker process used
246
to see if the client lives.
247
'None' if no process is running.
248
checker_initiator_tag: a gobject event source tag, or None
249
disable_initiator_tag: - '' -
250
checker_callback_tag: - '' -
251
checker_command: string; External command which is run to check if
252
client lives. %() expansions are done at
253
runtime with vars(self) as dict, so that for
254
instance %(name)s can be used in the command.
255
current_checker_command: string; current running checker_command
256
"""
257
258
@staticmethod
259
def _datetime_to_milliseconds(dt):
260
"Convert a datetime.datetime() to milliseconds"
261
return ((dt.days * 24 * 60 * 60 * 1000)
262
+ (dt.seconds * 1000)
263
+ (dt.microseconds // 1000))
264
265
def timeout_milliseconds(self):
266
"Return the 'timeout' attribute in milliseconds"
267
return self._datetime_to_milliseconds(self.timeout)
268
269
def interval_milliseconds(self):
270
"Return the 'interval' attribute in milliseconds"
271
return self._datetime_to_milliseconds(self.interval)
272
273
def __init__(self, name = None, disable_hook=None, config=None):
274
"""Note: the 'checker' key in 'config' sets the
275
'checker_command' attribute and *not* the 'checker'
276
attribute."""
19
def __init__(self, name=None, options=None, dn=None,
20
password=None, passfile=None, fqdn=None,
21
timeout=None, interval=-1):
277
22
self.name = name
278
if config is None:
279
config = {}
280
logger.debug(u"Creating client %r", self.name)
281
# Uppercase and remove spaces from fingerprint for later
282
# comparison purposes with return value from the fingerprint()
283
# function
284
self.fingerprint = (config[u"fingerprint"].upper()
285
.replace(u" ", u""))
286
logger.debug(u" Fingerprint: %s", self.fingerprint)
287
if u"secret" in config:
288
self.secret = config[u"secret"].decode(u"base64")
289
elif u"secfile" in config:
290
with closing(open(os.path.expanduser
291
(os.path.expandvars
292
(config[u"secfile"])))) as secfile:
293
self.secret = secfile.read()
23
self.dn = dn
24
if password:
25
self.password = password
26
elif passfile:
27
self.password = open(passfile).readall()
294
28
else:
295
raise TypeError(u"No secret or secfile for client %s"
296
% self.name)
297
self.host = config.get(u"host", u"")
298
self.created = datetime.datetime.utcnow()
299
self.enabled = False
300
self.last_enabled = None
301
self.last_checked_ok = None
302
self.timeout = string_to_delta(config[u"timeout"])
303
self.interval = string_to_delta(config[u"interval"])
304
self.disable_hook = disable_hook
305
self.checker = None
306
self.checker_initiator_tag = None
307
self.disable_initiator_tag = None
308
self.checker_callback_tag = None
309
self.checker_command = config[u"checker"]
310
self.current_checker_command = None
311
self.last_connect = None
312
313
def enable(self):
314
"""Start this client's checker and timeout hooks"""
315
if getattr(self, u"enabled", False):
316
# Already enabled
29
print "No Password or Passfile in client config file"
30
# raise RuntimeError XXX
31
self.password = "gazonk"
32
self.fqdn = fqdn # string
33
self.created = datetime.datetime.now()
34
self.last_seen = None # datetime.datetime()
35
if timeout is None:
36
timeout = options.timeout
37
self.timeout = timeout # datetime.timedelta()
38
if interval == -1:
39
interval = options.interval
40
self.interval = interval # datetime.timedelta()
41
self.next_check = datetime.datetime.now() # datetime.datetime()
42
self.checker = None # or a subprocess.Popen()
43
def check_action(self, now=None):
44
"""The checker said something and might have completed.
45
Check if is has, and take appropriate actions."""
46
if self.checker.poll() is None:
47
# False alarm, no result yet
48
#self.checker.read()
317
49
return
318
self.last_enabled = datetime.datetime.utcnow()
319
# Schedule a new checker to be started an 'interval' from now,
320
# and every interval from then on.
321
self.checker_initiator_tag = (gobject.timeout_add
322
(self.interval_milliseconds(),
323
self.start_checker))
324
# Also start a new checker *right now*.
325
self.start_checker()
326
# Schedule a disable() when 'timeout' has passed
327
self.disable_initiator_tag = (gobject.timeout_add
328
(self.timeout_milliseconds(),
329
self.disable))
330
self.enabled = True
331
332
def disable(self):
333
"""Disable this client."""
334
if not getattr(self, "enabled", False):
335
return False
336
logger.info(u"Disabling client %s", self.name)
337
if getattr(self, u"disable_initiator_tag", False):
338
gobject.source_remove(self.disable_initiator_tag)
339
self.disable_initiator_tag = None
340
if getattr(self, u"checker_initiator_tag", False):
341
gobject.source_remove(self.checker_initiator_tag)
342
self.checker_initiator_tag = None
343
self.stop_checker()
344
if self.disable_hook:
345
self.disable_hook(self)
346
self.enabled = False
347
# Do not run this again if called by a gobject.timeout_add
348
return False
349
350
def __del__(self):
351
self.disable_hook = None
352
self.disable()
353
354
def checker_callback(self, pid, condition, command):
355
"""The checker has completed, so take appropriate actions."""
356
self.checker_callback_tag = None
357
self.checker = None
358
if os.WIFEXITED(condition):
359
exitstatus = os.WEXITSTATUS(condition)
360
if exitstatus == 0:
361
logger.info(u"Checker for %(name)s succeeded",
362
vars(self))
363
self.checked_ok()
364
else:
365
logger.info(u"Checker for %(name)s failed",
366
vars(self))
367
else:
368
logger.warning(u"Checker for %(name)s crashed?",
369
vars(self))
370
371
def checked_ok(self):
372
"""Bump up the timeout for this client.
373
374
This should only be called when the client has been seen,
375
alive and well.
376
"""
377
self.last_checked_ok = datetime.datetime.utcnow()
378
gobject.source_remove(self.disable_initiator_tag)
379
self.disable_initiator_tag = (gobject.timeout_add
380
(self.timeout_milliseconds(),
381
self.disable))
382
50
if now is None:
51
now = datetime.datetime.now()
52
if self.checker.returncode == 0:
53
self.last_seen = now
54
while self.next_check <= now:
55
self.next_check += self.interval
56
handle_request = check_action
383
57
def start_checker(self):
384
"""Start a new checker subprocess if one is not running.
385
386
If a checker already exists, leave it running and do
387
nothing."""
388
# The reason for not killing a running checker is that if we
389
# did that, then if a checker (for some reason) started
390
# running slowly and taking more than 'interval' time, the
391
# client would inevitably timeout, since no checker would get
392
# a chance to run to completion. If we instead leave running
393
# checkers alone, the checker would have to take more time
394
# than 'timeout' for the client to be declared invalid, which
395
# is as it should be.
396
397
# If a checker exists, make sure it is not a zombie
398
if self.checker is not None:
399
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
400
if pid:
401
logger.warning(u"Checker was a zombie")
402
gobject.source_remove(self.checker_callback_tag)
403
self.checker_callback(pid, status,
404
self.current_checker_command)
405
# Start a new checker if needed
406
if self.checker is None:
407
try:
408
# In case checker_command has exactly one % operator
409
command = self.checker_command % self.host
410
except TypeError:
411
# Escape attributes for the shell
412
escaped_attrs = dict((key,
413
re.escape(unicode(str(val),
414
errors=
415
u'replace')))
416
for key, val in
417
vars(self).iteritems())
418
try:
419
command = self.checker_command % escaped_attrs
420
except TypeError, error:
421
logger.error(u'Could not format string "%s":'
422
u' %s', self.checker_command, error)
423
return True # Try again later
424
self.current_checker_command = command
425
try:
426
logger.info(u"Starting checker %r for %s",
427
command, self.name)
428
# We don't need to redirect stdout and stderr, since
429
# in normal mode, that is already done by daemon(),
430
# and in debug mode we don't want to. (Stdin is
431
# always replaced by /dev/null.)
432
self.checker = subprocess.Popen(command,
433
close_fds=True,
434
shell=True, cwd=u"/")
435
self.checker_callback_tag = (gobject.child_watch_add
436
(self.checker.pid,
437
self.checker_callback,
438
data=command))
439
# The checker may have completed before the gobject
440
# watch was added. Check for this.
441
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
442
if pid:
443
gobject.source_remove(self.checker_callback_tag)
444
self.checker_callback(pid, status, command)
445
except OSError, error:
446
logger.error(u"Failed to start subprocess: %s",
447
error)
448
# Re-run this periodically if run by gobject.timeout_add
449
return True
450
58
self.stop_checker()
59
try:
60
self.checker = subprocess.Popen("sleep 1; fping -q -- %s"
61
% re.escape(self.fqdn),
62
stdout=subprocess.PIPE,
63
close_fds=True,
64
shell=True, cwd="/")
65
except subprocess.OSError, e:
66
print "Failed to start subprocess:", e
451
67
def stop_checker(self):
452
"""Force the checker process, if any, to stop."""
453
if self.checker_callback_tag:
454
gobject.source_remove(self.checker_callback_tag)
455
self.checker_callback_tag = None
456
if getattr(self, u"checker", None) is None:
68
if self.checker is None:
457
69
return
458
logger.debug(u"Stopping checker for %(name)s", vars(self))
459
try:
460
os.kill(self.checker.pid, signal.SIGTERM)
461
#os.sleep(0.5)
462
#if self.checker.poll() is None:
463
# os.kill(self.checker.pid, signal.SIGKILL)
464
except OSError, error:
465
if error.errno != errno.ESRCH: # No such process
466
raise
467
self.checker = None
468
469
def still_valid(self):
470
"""Has the timeout not yet passed for this client?"""
471
if not getattr(self, u"enabled", False):
472
return False
473
now = datetime.datetime.utcnow()
474
if self.last_checked_ok is None:
475
return now < (self.created + self.timeout)
476
else:
477
return now < (self.last_checked_ok + self.timeout)
478
479
480
class ClientDBus(Client, dbus.service.Object):
481
"""A Client class using D-Bus
482
483
Attributes:
484
dbus_object_path: dbus.ObjectPath
485
bus: dbus.SystemBus()
486
"""
487
# dbus.service.Object doesn't use super(), so we can't either.
488
489
def __init__(self, bus = None, *args, **kwargs):
490
self.bus = bus
491
Client.__init__(self, *args, **kwargs)
492
# Only now, when this client is initialized, can it show up on
493
# the D-Bus
494
self.dbus_object_path = (dbus.ObjectPath
495
(u"/clients/"
496
+ self.name.replace(u".", u"_")))
497
dbus.service.Object.__init__(self, self.bus,
498
self.dbus_object_path)
499
500
@staticmethod
501
def _datetime_to_dbus(dt, variant_level=0):
502
"""Convert a UTC datetime.datetime() to a D-Bus type."""
503
return dbus.String(dt.isoformat(),
504
variant_level=variant_level)
505
506
def enable(self):
507
oldstate = getattr(self, u"enabled", False)
508
r = Client.enable(self)
509
if oldstate != self.enabled:
510
# Emit D-Bus signals
511
self.PropertyChanged(dbus.String(u"enabled"),
512
dbus.Boolean(True, variant_level=1))
513
self.PropertyChanged(
514
dbus.String(u"last_enabled"),
515
self._datetime_to_dbus(self.last_enabled,
516
variant_level=1))
517
return r
518
519
def disable(self, signal = True):
520
oldstate = getattr(self, u"enabled", False)
521
r = Client.disable(self)
522
if signal and oldstate != self.enabled:
523
# Emit D-Bus signal
524
self.PropertyChanged(dbus.String(u"enabled"),
525
dbus.Boolean(False, variant_level=1))
526
return r
527
528
def __del__(self, *args, **kwargs):
529
try:
530
self.remove_from_connection()
531
except LookupError:
532
pass
533
if hasattr(dbus.service.Object, u"__del__"):
534
dbus.service.Object.__del__(self, *args, **kwargs)
535
Client.__del__(self, *args, **kwargs)
536
537
def checker_callback(self, pid, condition, command,
538
*args, **kwargs):
539
self.checker_callback_tag = None
540
self.checker = None
541
# Emit D-Bus signal
542
self.PropertyChanged(dbus.String(u"checker_running"),
543
dbus.Boolean(False, variant_level=1))
544
if os.WIFEXITED(condition):
545
exitstatus = os.WEXITSTATUS(condition)
546
# Emit D-Bus signal
547
self.CheckerCompleted(dbus.Int16(exitstatus),
548
dbus.Int64(condition),
549
dbus.String(command))
550
else:
551
# Emit D-Bus signal
552
self.CheckerCompleted(dbus.Int16(-1),
553
dbus.Int64(condition),
554
dbus.String(command))
555
556
return Client.checker_callback(self, pid, condition, command,
557
*args, **kwargs)
558
559
def checked_ok(self, *args, **kwargs):
560
r = Client.checked_ok(self, *args, **kwargs)
561
# Emit D-Bus signal
562
self.PropertyChanged(
563
dbus.String(u"last_checked_ok"),
564
(self._datetime_to_dbus(self.last_checked_ok,
565
variant_level=1)))
566
return r
567
568
def start_checker(self, *args, **kwargs):
569
old_checker = self.checker
570
if self.checker is not None:
571
old_checker_pid = self.checker.pid
572
else:
573
old_checker_pid = None
574
r = Client.start_checker(self, *args, **kwargs)
575
# Only if new checker process was started
576
if (self.checker is not None
577
and old_checker_pid != self.checker.pid):
578
# Emit D-Bus signal
579
self.CheckerStarted(self.current_checker_command)
580
self.PropertyChanged(
581
dbus.String(u"checker_running"),
582
dbus.Boolean(True, variant_level=1))
583
return r
584
585
def stop_checker(self, *args, **kwargs):
586
old_checker = getattr(self, u"checker", None)
587
r = Client.stop_checker(self, *args, **kwargs)
588
if (old_checker is not None
589
and getattr(self, u"checker", None) is None):
590
self.PropertyChanged(dbus.String(u"checker_running"),
591
dbus.Boolean(False, variant_level=1))
592
return r
593
594
## D-Bus methods & signals
595
_interface = u"se.bsnet.fukt.Mandos.Client"
596
597
# CheckedOK - method
598
@dbus.service.method(_interface)
599
def CheckedOK(self):
600
return self.checked_ok()
601
602
# CheckerCompleted - signal
603
@dbus.service.signal(_interface, signature=u"nxs")
604
def CheckerCompleted(self, exitcode, waitstatus, command):
605
"D-Bus signal"
606
pass
607
608
# CheckerStarted - signal
609
@dbus.service.signal(_interface, signature=u"s")
610
def CheckerStarted(self, command):
611
"D-Bus signal"
612
pass
613
614
# GetAllProperties - method
615
@dbus.service.method(_interface, out_signature=u"a{sv}")
616
def GetAllProperties(self):
617
"D-Bus method"
618
return dbus.Dictionary({
619
dbus.String(u"name"):
620
dbus.String(self.name, variant_level=1),
621
dbus.String(u"fingerprint"):
622
dbus.String(self.fingerprint, variant_level=1),
623
dbus.String(u"host"):
624
dbus.String(self.host, variant_level=1),
625
dbus.String(u"created"):
626
self._datetime_to_dbus(self.created,
627
variant_level=1),
628
dbus.String(u"last_enabled"):
629
(self._datetime_to_dbus(self.last_enabled,
630
variant_level=1)
631
if self.last_enabled is not None
632
else dbus.Boolean(False, variant_level=1)),
633
dbus.String(u"enabled"):
634
dbus.Boolean(self.enabled, variant_level=1),
635
dbus.String(u"last_checked_ok"):
636
(self._datetime_to_dbus(self.last_checked_ok,
637
variant_level=1)
638
if self.last_checked_ok is not None
639
else dbus.Boolean (False, variant_level=1)),
640
dbus.String(u"timeout"):
641
dbus.UInt64(self.timeout_milliseconds(),
642
variant_level=1),
643
dbus.String(u"interval"):
644
dbus.UInt64(self.interval_milliseconds(),
645
variant_level=1),
646
dbus.String(u"checker"):
647
dbus.String(self.checker_command,
648
variant_level=1),
649
dbus.String(u"checker_running"):
650
dbus.Boolean(self.checker is not None,
651
variant_level=1),
652
dbus.String(u"object_path"):
653
dbus.ObjectPath(self.dbus_object_path,
654
variant_level=1)
655
}, signature=u"sv")
656
657
# IsStillValid - method
658
@dbus.service.method(_interface, out_signature=u"b")
659
def IsStillValid(self):
660
return self.still_valid()
661
662
# PropertyChanged - signal
663
@dbus.service.signal(_interface, signature=u"sv")
664
def PropertyChanged(self, property, value):
665
"D-Bus signal"
666
pass
667
668
# ReceivedSecret - signal
669
@dbus.service.signal(_interface)
670
def ReceivedSecret(self):
671
"D-Bus signal"
672
pass
673
674
# Rejected - signal
675
@dbus.service.signal(_interface)
676
def Rejected(self):
677
"D-Bus signal"
678
pass
679
680
# SetChecker - method
681
@dbus.service.method(_interface, in_signature=u"s")
682
def SetChecker(self, checker):
683
"D-Bus setter method"
684
self.checker_command = checker
685
# Emit D-Bus signal
686
self.PropertyChanged(dbus.String(u"checker"),
687
dbus.String(self.checker_command,
688
variant_level=1))
689
690
# SetHost - method
691
@dbus.service.method(_interface, in_signature=u"s")
692
def SetHost(self, host):
693
"D-Bus setter method"
694
self.host = host
695
# Emit D-Bus signal
696
self.PropertyChanged(dbus.String(u"host"),
697
dbus.String(self.host, variant_level=1))
698
699
# SetInterval - method
700
@dbus.service.method(_interface, in_signature=u"t")
701
def SetInterval(self, milliseconds):
702
self.interval = datetime.timedelta(0, 0, 0, milliseconds)
703
# Emit D-Bus signal
704
self.PropertyChanged(dbus.String(u"interval"),
705
(dbus.UInt64(self.interval_milliseconds(),
706
variant_level=1)))
707
708
# SetSecret - method
709
@dbus.service.method(_interface, in_signature=u"ay",
710
byte_arrays=True)
711
def SetSecret(self, secret):
712
"D-Bus setter method"
713
self.secret = str(secret)
714
715
# SetTimeout - method
716
@dbus.service.method(_interface, in_signature=u"t")
717
def SetTimeout(self, milliseconds):
718
self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
719
# Emit D-Bus signal
720
self.PropertyChanged(dbus.String(u"timeout"),
721
(dbus.UInt64(self.timeout_milliseconds(),
722
variant_level=1)))
723
724
# Enable - method
725
@dbus.service.method(_interface)
726
def Enable(self):
727
"D-Bus method"
728
self.enable()
729
730
# StartChecker - method
731
@dbus.service.method(_interface)
732
def StartChecker(self):
733
"D-Bus method"
734
self.start_checker()
735
736
# Disable - method
737
@dbus.service.method(_interface)
738
def Disable(self):
739
"D-Bus method"
740
self.disable()
741
742
# StopChecker - method
743
@dbus.service.method(_interface)
744
def StopChecker(self):
745
self.stop_checker()
746
747
del _interface
748
749
750
class ClientHandler(socketserver.BaseRequestHandler, object):
751
"""A class to handle client connections.
752
753
Instantiated once for each connection to handle it.
754
Note: This will run in its own forked process."""
755
756
def handle(self):
757
logger.info(u"TCP connection from: %s",
758
unicode(self.client_address))
759
logger.debug(u"IPC Pipe FD: %d", self.server.pipe[1])
760
# Open IPC pipe to parent process
761
with closing(os.fdopen(self.server.pipe[1], u"w", 1)) as ipc:
762
session = (gnutls.connection
763
.ClientSession(self.request,
764
gnutls.connection
765
.X509Credentials()))
766
767
line = self.request.makefile().readline()
768
logger.debug(u"Protocol version: %r", line)
769
try:
770
if int(line.strip().split()[0]) > 1:
771
raise RuntimeError
772
except (ValueError, IndexError, RuntimeError), error:
773
logger.error(u"Unknown protocol version: %s", error)
774
return
775
776
# Note: gnutls.connection.X509Credentials is really a
777
# generic GnuTLS certificate credentials object so long as
778
# no X.509 keys are added to it. Therefore, we can use it
779
# here despite using OpenPGP certificates.
780
781
#priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
782
# u"+AES-256-CBC", u"+SHA1",
783
# u"+COMP-NULL", u"+CTYPE-OPENPGP",
784
# u"+DHE-DSS"))
785
# Use a fallback default, since this MUST be set.
786
priority = self.server.gnutls_priority
787
if priority is None:
788
priority = u"NORMAL"
789
(gnutls.library.functions
790
.gnutls_priority_set_direct(session._c_object,
791
priority, None))
792
793
try:
794
session.handshake()
795
except gnutls.errors.GNUTLSError, error:
796
logger.warning(u"Handshake failed: %s", error)
797
# Do not run session.bye() here: the session is not
798
# established. Just abandon the request.
799
return
800
logger.debug(u"Handshake succeeded")
801
try:
802
fpr = self.fingerprint(self.peer_certificate(session))
803
except (TypeError, gnutls.errors.GNUTLSError), error:
804
logger.warning(u"Bad certificate: %s", error)
805
session.bye()
806
return
807
logger.debug(u"Fingerprint: %s", fpr)
808
809
for c in self.server.clients:
810
if c.fingerprint == fpr:
811
client = c
812
break
813
else:
814
ipc.write(u"NOTFOUND %s %s\n"
815
% (fpr, unicode(self.client_address)))
816
session.bye()
817
return
818
# Have to check if client.still_valid(), since it is
819
# possible that the client timed out while establishing
820
# the GnuTLS session.
821
if not client.still_valid():
822
ipc.write(u"INVALID %s\n" % client.name)
823
session.bye()
824
return
825
ipc.write(u"SENDING %s\n" % client.name)
826
sent_size = 0
827
while sent_size < len(client.secret):
828
sent = session.send(client.secret[sent_size:])
829
logger.debug(u"Sent: %d, remaining: %d",
830
sent, len(client.secret)
831
- (sent_size + sent))
832
sent_size += sent
833
session.bye()
834
835
@staticmethod
836
def peer_certificate(session):
837
"Return the peer's OpenPGP certificate as a bytestring"
838
# If not an OpenPGP certificate...
839
if (gnutls.library.functions
840
.gnutls_certificate_type_get(session._c_object)
841
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
842
# ...do the normal thing
843
return session.peer_certificate
844
list_size = ctypes.c_uint(1)
845
cert_list = (gnutls.library.functions
846
.gnutls_certificate_get_peers
847
(session._c_object, ctypes.byref(list_size)))
848
if not bool(cert_list) and list_size.value != 0:
849
raise gnutls.errors.GNUTLSError(u"error getting peer"
850
u" certificate")
851
if list_size.value == 0:
70
os.kill(self.checker.pid, signal.SIGTERM)
71
if self.checker.poll() is None:
72
os.kill(self.checker.pid, signal.SIGKILL)
73
self.checker = None
74
__del__ = stop_checker
75
def fileno(self):
76
if self.checker is None:
852
77
return None
853
cert = cert_list[0]
854
return ctypes.string_at(cert.data, cert.size)
855
856
@staticmethod
857
def fingerprint(openpgp):
858
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
859
# New GnuTLS "datum" with the OpenPGP public key
860
datum = (gnutls.library.types
861
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
862
ctypes.POINTER
863
(ctypes.c_ubyte)),
864
ctypes.c_uint(len(openpgp))))
865
# New empty GnuTLS certificate
866
crt = gnutls.library.types.gnutls_openpgp_crt_t()
867
(gnutls.library.functions
868
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
869
# Import the OpenPGP public key into the certificate
870
(gnutls.library.functions
871
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
872
gnutls.library.constants
873
.GNUTLS_OPENPGP_FMT_RAW))
874
# Verify the self signature in the key
875
crtverify = ctypes.c_uint()
876
(gnutls.library.functions
877
.gnutls_openpgp_crt_verify_self(crt, 0,
878
ctypes.byref(crtverify)))
879
if crtverify.value != 0:
880
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
881
raise (gnutls.errors.CertificateSecurityError
882
(u"Verify failed"))
883
# New buffer for the fingerprint
884
buf = ctypes.create_string_buffer(20)
885
buf_len = ctypes.c_size_t()
886
# Get the fingerprint from the certificate into the buffer
887
(gnutls.library.functions
888
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
889
ctypes.byref(buf_len)))
890
# Deinit the certificate
891
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
892
# Convert the buffer to a Python bytestring
893
fpr = ctypes.string_at(buf, buf_len.value)
894
# Convert the bytestring to hexadecimal notation
895
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
896
return hex_fpr
897
898
899
class ForkingMixInWithPipe(socketserver.ForkingMixIn, object):
900
"""Like socketserver.ForkingMixIn, but also pass a pipe."""
901
def process_request(self, request, client_address):
902
"""Overrides and wraps the original process_request().
903
904
This function creates a new pipe in self.pipe
905
"""
906
self.pipe = os.pipe()
907
super(ForkingMixInWithPipe,
908
self).process_request(request, client_address)
909
os.close(self.pipe[1]) # close write end
910
self.add_pipe(self.pipe[0])
911
def add_pipe(self, pipe):
912
"""Dummy function; override as necessary"""
913
os.close(pipe)
914
915
916
class IPv6_TCPServer(ForkingMixInWithPipe,
917
socketserver.TCPServer, object):
918
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
919
920
Attributes:
921
enabled: Boolean; whether this server is activated yet
922
interface: None or a network interface name (string)
923
use_ipv6: Boolean; to use IPv6 or not
924
"""
925
def __init__(self, server_address, RequestHandlerClass,
926
interface=None, use_ipv6=True):
927
self.interface = interface
928
if use_ipv6:
929
self.address_family = socket.AF_INET6
930
socketserver.TCPServer.__init__(self, server_address,
931
RequestHandlerClass)
932
def server_bind(self):
933
"""This overrides the normal server_bind() function
934
to bind to an interface if one was specified, and also NOT to
935
bind to an address or port if they were not specified."""
936
if self.interface is not None:
937
if SO_BINDTODEVICE is None:
938
logger.error(u"SO_BINDTODEVICE does not exist;"
939
u" cannot bind to interface %s",
940
self.interface)
941
else:
78
return self.checker.stdout.fileno()
79
def next_stop(self):
80
"""The time when something must be done about this client"""
81
return min(self.last_seen + self.timeout, self.next_check)
82
def still_valid(self, now=None):
83
"""Has this client's timeout not passed?"""
84
if now is None:
85
now = datetime.datetime.now()
86
return now < (self.last_seen + timeout)
87
def it_is_time_to_check(self, now=None):
88
if now is None:
89
now = datetime.datetime.now()
90
return self.next_check <= now
91
92
93
class server_metaclass(type):
94
"Common behavior for the UDP and TCP server classes"
95
def __new__(cls, name, bases, attrs):
96
attrs["address_family"] = socket.AF_INET6
97
attrs["allow_reuse_address"] = True
98
def server_bind(self):
99
if self.options.interface:
100
if not hasattr(socket, "SO_BINDTODEVICE"):
101
# From /usr/include/asm-i486/socket.h
102
socket.SO_BINDTODEVICE = 25
942
103
try:
943
104
self.socket.setsockopt(socket.SOL_SOCKET,
944
SO_BINDTODEVICE,
945
str(self.interface
946
+ u'\0'))
105
socket.SO_BINDTODEVICE,
106
self.options.interface)
947
107
except socket.error, error:
948
108
if error[0] == errno.EPERM:
949
logger.error(u"No permission to"
950
u" bind to interface %s",
951
self.interface)
952
elif error[0] == errno.ENOPROTOOPT:
953
logger.error(u"SO_BINDTODEVICE not available;"
954
u" cannot bind to interface %s",
955
self.interface)
109
print "Warning: No permission to bind to interface", \
110
self.options.interface
956
111
else:
957
raise
958
# Only bind(2) the socket if we really need to.
959
if self.server_address[0] or self.server_address[1]:
960
if not self.server_address[0]:
961
if self.address_family == socket.AF_INET6:
962
any_address = u"::" # in6addr_any
963
else:
964
any_address = socket.INADDR_ANY
965
self.server_address = (any_address,
966
self.server_address[1])
967
elif not self.server_address[1]:
968
self.server_address = (self.server_address[0],
969
0)
970
# if self.interface:
971
# self.server_address = (self.server_address[0],
972
# 0, # port
973
# 0, # flowinfo
974
# if_nametoindex
975
# (self.interface))
976
return socketserver.TCPServer.server_bind(self)
977
978
979
class MandosServer(IPv6_TCPServer):
980
"""Mandos server.
981
982
Attributes:
983
clients: set of Client objects
984
gnutls_priority GnuTLS priority string
985
use_dbus: Boolean; to emit D-Bus signals or not
986
987
Assumes a gobject.MainLoop event loop.
988
"""
989
def __init__(self, server_address, RequestHandlerClass,
990
interface=None, use_ipv6=True, clients=None,
991
gnutls_priority=None, use_dbus=True):
992
self.enabled = False
993
self.clients = clients
994
if self.clients is None:
995
self.clients = set()
996
self.use_dbus = use_dbus
997
self.gnutls_priority = gnutls_priority
998
IPv6_TCPServer.__init__(self, server_address,
999
RequestHandlerClass,
1000
interface = interface,
1001
use_ipv6 = use_ipv6)
1002
def server_activate(self):
1003
if self.enabled:
1004
return socketserver.TCPServer.server_activate(self)
1005
def enable(self):
1006
self.enabled = True
1007
def add_pipe(self, pipe):
1008
# Call "handle_ipc" for both data and EOF events
1009
gobject.io_add_watch(pipe, gobject.IO_IN | gobject.IO_HUP,
1010
self.handle_ipc)
1011
def handle_ipc(self, source, condition, file_objects={}):
1012
condition_names = {
1013
gobject.IO_IN: u"IN", # There is data to read.
1014
gobject.IO_OUT: u"OUT", # Data can be written (without
1015
# blocking).
1016
gobject.IO_PRI: u"PRI", # There is urgent data to read.
1017
gobject.IO_ERR: u"ERR", # Error condition.
1018
gobject.IO_HUP: u"HUP" # Hung up (the connection has been
1019
# broken, usually for pipes and
1020
# sockets).
1021
}
1022
conditions_string = ' | '.join(name
1023
for cond, name in
1024
condition_names.iteritems()
1025
if cond & condition)
1026
logger.debug(u"Handling IPC: FD = %d, condition = %s", source,
1027
conditions_string)
1028
1029
# Turn the pipe file descriptor into a Python file object
1030
if source not in file_objects:
1031
file_objects[source] = os.fdopen(source, u"r", 1)
1032
1033
# Read a line from the file object
1034
cmdline = file_objects[source].readline()
1035
if not cmdline: # Empty line means end of file
1036
# close the IPC pipe
1037
file_objects[source].close()
1038
del file_objects[source]
1039
1040
# Stop calling this function
1041
return False
1042
1043
logger.debug(u"IPC command: %r", cmdline)
1044
1045
# Parse and act on command
1046
cmd, args = cmdline.rstrip(u"\r\n").split(None, 1)
1047
1048
if cmd == u"NOTFOUND":
1049
logger.warning(u"Client not found for fingerprint: %s",
1050
args)
1051
if self.use_dbus:
1052
# Emit D-Bus signal
1053
mandos_dbus_service.ClientNotFound(args)
1054
elif cmd == u"INVALID":
1055
for client in self.clients:
1056
if client.name == args:
1057
logger.warning(u"Client %s is invalid", args)
1058
if self.use_dbus:
1059
# Emit D-Bus signal
1060
client.Rejected()
1061
break
1062
else:
1063
logger.error(u"Unknown client %s is invalid", args)
1064
elif cmd == u"SENDING":
1065
for client in self.clients:
1066
if client.name == args:
1067
logger.info(u"Sending secret to %s", client.name)
1068
client.checked_ok()
1069
if self.use_dbus:
1070
# Emit D-Bus signal
1071
client.ReceivedSecret()
1072
break
1073
else:
1074
logger.error(u"Sending secret to unknown client %s",
1075
args)
1076
else:
1077
logger.error(u"Unknown IPC command: %r", cmdline)
1078
1079
# Keep calling this function
1080
return True
1081
112
raise error
113
return super(type(self), self).server_bind()
114
attrs["server_bind"] = server_bind
115
def init(self, *args, **kwargs):
116
if "options" in kwargs:
117
self.options = kwargs["options"]
118
del kwargs["options"]
119
if "clients" in kwargs:
120
self.clients = kwargs["clients"]
121
del kwargs["clients"]
122
if "credentials" in kwargs:
123
self.credentials = kwargs["credentials"]
124
del kwargs["credentials"]
125
return super(type(self), self).__init__(*args, **kwargs)
126
attrs["__init__"] = init
127
return type.__new__(cls, name, bases, attrs)
128
129
130
class udp_handler(SocketServer.DatagramRequestHandler, object):
131
def handle(self):
132
self.wfile.write("Polo")
133
print "UDP request answered"
134
135
136
class IPv6_UDPServer(SocketServer.UDPServer, object):
137
__metaclass__ = server_metaclass
138
def verify_request(self, request, client_address):
139
print "UDP request came"
140
return request[0] == "Marco"
141
142
143
class tcp_handler(SocketServer.BaseRequestHandler, object):
144
def handle(self):
145
print "TCP request came"
146
print "Request:", self.request
147
print "Client Address:", self.client_address
148
print "Server:", self.server
149
session = gnutls.connection.ServerSession(self.request,
150
self.server.credentials)
151
session.handshake()
152
if session.peer_certificate:
153
print "DN:", session.peer_certificate.subject
154
try:
155
session.verify_peer()
156
except gnutls.errors.CertificateError, error:
157
print "Verify failed", error
158
session.bye()
159
return
160
try:
161
session.send(dict((client.dn, client.password)
162
for client in self.server.clients)
163
[session.peer_certificate.subject])
164
except KeyError:
165
session.send("gazonk")
166
# Log maybe? XXX
167
session.bye()
168
169
170
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
171
__metaclass__ = server_metaclass
172
request_queue_size = 1024
173
174
175
in6addr_any = "::"
1082
176
1083
177
def string_to_delta(interval):
1084
178
"""Parse a string and return a datetime.timedelta
1085
1086
>>> string_to_delta(u'7d')
179
180
>>> string_to_delta('7d')
1087
181
datetime.timedelta(7)
1088
>>> string_to_delta(u'60s')
182
>>> string_to_delta('60s')
1089
183
datetime.timedelta(0, 60)
1090
>>> string_to_delta(u'60m')
184
>>> string_to_delta('60m')
1091
185
datetime.timedelta(0, 3600)
1092
>>> string_to_delta(u'24h')
186
>>> string_to_delta('24h')
1093
187
datetime.timedelta(1)
1094
188
>>> string_to_delta(u'1w')
1095
189
datetime.timedelta(7)
1096
>>> string_to_delta(u'5m 30s')
1097
datetime.timedelta(0, 330)
1098
190
"""
1099
timevalue = datetime.timedelta(0)
1100
for s in interval.split():
1101
try:
1102
suffix = unicode(s[-1])
1103
value = int(s[:-1])
1104
if suffix == u"d":
1105
delta = datetime.timedelta(value)
1106
elif suffix == u"s":
1107
delta = datetime.timedelta(0, value)
1108
elif suffix == u"m":
1109
delta = datetime.timedelta(0, 0, 0, 0, value)
1110
elif suffix == u"h":
1111
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
1112
elif suffix == u"w":
1113
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1114
else:
1115
raise ValueError
1116
except (ValueError, IndexError):
191
try:
192
suffix=unicode(interval[-1])
193
value=int(interval[:-1])
194
if suffix == u"d":
195
delta = datetime.timedelta(value)
196
elif suffix == u"s":
197
delta = datetime.timedelta(0, value)
198
elif suffix == u"m":
199
delta = datetime.timedelta(0, 0, 0, 0, value)
200
elif suffix == u"h":
201
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
202
elif suffix == u"w":
203
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
204
else:
1117
205
raise ValueError
1118
timevalue += delta
1119
return timevalue
1120
1121
1122
def if_nametoindex(interface):
1123
"""Call the C function if_nametoindex(), or equivalent
1124
1125
Note: This function cannot accept a unicode string."""
1126
global if_nametoindex
1127
try:
1128
if_nametoindex = (ctypes.cdll.LoadLibrary
1129
(ctypes.util.find_library(u"c"))
1130
.if_nametoindex)
1131
except (OSError, AttributeError):
1132
logger.warning(u"Doing if_nametoindex the hard way")
1133
def if_nametoindex(interface):
1134
"Get an interface index the hard way, i.e. using fcntl()"
1135
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1136
with closing(socket.socket()) as s:
1137
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1138
struct.pack(str(u"16s16x"),
1139
interface))
1140
interface_index = struct.unpack(str(u"I"),
1141
ifreq[16:20])[0]
1142
return interface_index
1143
return if_nametoindex(interface)
1144
1145
1146
def daemon(nochdir = False, noclose = False):
1147
"""See daemon(3). Standard BSD Unix function.
1148
1149
This should really exist as os.daemon, but it doesn't (yet)."""
1150
if os.fork():
1151
sys.exit()
1152
os.setsid()
1153
if not nochdir:
1154
os.chdir(u"/")
1155
if os.fork():
1156
sys.exit()
1157
if not noclose:
1158
# Close all standard open file descriptors
1159
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1160
if not stat.S_ISCHR(os.fstat(null).st_mode):
1161
raise OSError(errno.ENODEV,
1162
u"/dev/null not a character device")
1163
os.dup2(null, sys.stdin.fileno())
1164
os.dup2(null, sys.stdout.fileno())
1165
os.dup2(null, sys.stderr.fileno())
1166
if null > 2:
1167
os.close(null)
206
except (ValueError, IndexError):
207
raise ValueError
208
return delta
1168
209
1169
210
1170
211
def main():
1171
1172
######################################################################
1173
# Parsing of options, both command line and config file
1174
1175
parser = optparse.OptionParser(version = "%%prog %s" % version)
1176
parser.add_option("-i", u"--interface", type=u"string",
1177
metavar="IF", help=u"Bind to interface IF")
1178
parser.add_option("-a", u"--address", type=u"string",
1179
help=u"Address to listen for requests on")
1180
parser.add_option("-p", u"--port", type=u"int",
1181
help=u"Port number to receive requests on")
1182
parser.add_option("--check", action=u"store_true",
1183
help=u"Run self-test")
1184
parser.add_option("--debug", action=u"store_true",
1185
help=u"Debug mode; run in foreground and log to"
1186
u" terminal")
1187
parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1188
u" priority string (see GnuTLS documentation)")
1189
parser.add_option("--servicename", type=u"string",
1190
metavar=u"NAME", help=u"Zeroconf service name")
1191
parser.add_option("--configdir", type=u"string",
1192
default=u"/etc/mandos", metavar=u"DIR",
1193
help=u"Directory to search for configuration"
1194
u" files")
1195
parser.add_option("--no-dbus", action=u"store_false",
1196
dest=u"use_dbus", help=u"Do not provide D-Bus"
1197
u" system bus interface")
1198
parser.add_option("--no-ipv6", action=u"store_false",
1199
dest=u"use_ipv6", help=u"Do not use IPv6")
1200
options = parser.parse_args()[0]
1201
212
parser = OptionParser()
213
parser.add_option("-i", "--interface", type="string",
214
default="eth0", metavar="IF",
215
help="Interface to bind to")
216
parser.add_option("--cert", type="string", default="cert.pem",
217
metavar="FILE",
218
help="Public key certificate to use")
219
parser.add_option("--key", type="string", default="key.pem",
220
metavar="FILE",
221
help="Private key to use")
222
parser.add_option("--ca", type="string", default="ca.pem",
223
metavar="FILE",
224
help="Certificate Authority certificate to use")
225
parser.add_option("--crl", type="string", default="crl.pem",
226
metavar="FILE",
227
help="Certificate Revokation List to use")
228
parser.add_option("-p", "--port", type="int", default=49001,
229
help="Port number to receive requests on")
230
parser.add_option("--dh", type="int", metavar="BITS",
231
help="DH group to use")
232
parser.add_option("-t", "--timeout", type="string", # Parsed later
233
default="15m",
234
help="Amount of downtime allowed for clients")
235
parser.add_option("--interval", type="string", # Parsed later
236
default="5m",
237
help="How often to check that a client is up")
238
parser.add_option("--check", action="store_true", default=False,
239
help="Run self-test")
240
(options, args) = parser.parse_args()
241
1202
242
if options.check:
1203
243
import doctest
1204
244
doctest.testmod()
1205
245
sys.exit()
1206
246
1207
# Default values for config file for server-global settings
1208
server_defaults = { u"interface": u"",
1209
u"address": u"",
1210
u"port": u"",
1211
u"debug": u"False",
1212
u"priority":
1213
u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1214
u"servicename": u"Mandos",
1215
u"use_dbus": u"True",
1216
u"use_ipv6": u"True",
1217
}
1218
1219
# Parse config file for server-global settings
1220
server_config = configparser.SafeConfigParser(server_defaults)
1221
del server_defaults
1222
server_config.read(os.path.join(options.configdir,
1223
u"mandos.conf"))
1224
# Convert the SafeConfigParser object to a dict
1225
server_settings = server_config.defaults()
1226
# Use the appropriate methods on the non-string config options
1227
for option in (u"debug", u"use_dbus", u"use_ipv6"):
1228
server_settings[option] = server_config.getboolean(u"DEFAULT",
1229
option)
1230
if server_settings["port"]:
1231
server_settings["port"] = server_config.getint(u"DEFAULT",
1232
u"port")
1233
del server_config
1234
1235
# Override the settings from the config file with command line
1236
# options, if set.
1237
for option in (u"interface", u"address", u"port", u"debug",
1238
u"priority", u"servicename", u"configdir",
1239
u"use_dbus", u"use_ipv6"):
1240
value = getattr(options, option)
1241
if value is not None:
1242
server_settings[option] = value
1243
del options
1244
# Force all strings to be unicode
1245
for option in server_settings.keys():
1246
if type(server_settings[option]) is str:
1247
server_settings[option] = unicode(server_settings[option])
1248
# Now we have our good server settings in "server_settings"
1249
1250
##################################################################
1251
1252
# For convenience
1253
debug = server_settings[u"debug"]
1254
use_dbus = server_settings[u"use_dbus"]
1255
use_ipv6 = server_settings[u"use_ipv6"]
1256
1257
if not debug:
1258
syslogger.setLevel(logging.WARNING)
1259
console.setLevel(logging.WARNING)
1260
1261
if server_settings[u"servicename"] != u"Mandos":
1262
syslogger.setFormatter(logging.Formatter
1263
(u'Mandos (%s) [%%(process)d]:'
1264
u' %%(levelname)s: %%(message)s'
1265
% server_settings[u"servicename"]))
1266
1267
# Parse config file with clients
1268
client_defaults = { u"timeout": u"1h",
1269
u"interval": u"5m",
1270
u"checker": u"fping -q -- %%(host)s",
1271
u"host": u"",
1272
}
1273
client_config = configparser.SafeConfigParser(client_defaults)
1274
client_config.read(os.path.join(server_settings[u"configdir"],
1275
u"clients.conf"))
1276
1277
global mandos_dbus_service
1278
mandos_dbus_service = None
1279
1280
tcp_server = MandosServer((server_settings[u"address"],
1281
server_settings[u"port"]),
1282
ClientHandler,
1283
interface=server_settings[u"interface"],
1284
use_ipv6=use_ipv6,
1285
gnutls_priority=
1286
server_settings[u"priority"],
1287
use_dbus=use_dbus)
1288
pidfilename = u"/var/run/mandos.pid"
1289
try:
1290
pidfile = open(pidfilename, u"w")
1291
except IOError:
1292
logger.error(u"Could not open file %r", pidfilename)
1293
1294
try:
1295
uid = pwd.getpwnam(u"_mandos").pw_uid
1296
gid = pwd.getpwnam(u"_mandos").pw_gid
1297
except KeyError:
1298
try:
1299
uid = pwd.getpwnam(u"mandos").pw_uid
1300
gid = pwd.getpwnam(u"mandos").pw_gid
1301
except KeyError:
1302
try:
1303
uid = pwd.getpwnam(u"nobody").pw_uid
1304
gid = pwd.getpwnam(u"nobody").pw_gid
1305
except KeyError:
1306
uid = 65534
1307
gid = 65534
1308
try:
1309
os.setgid(gid)
1310
os.setuid(uid)
1311
except OSError, error:
1312
if error[0] != errno.EPERM:
1313
raise error
1314
1315
# Enable all possible GnuTLS debugging
1316
if debug:
1317
# "Use a log level over 10 to enable all debugging options."
1318
# - GnuTLS manual
1319
gnutls.library.functions.gnutls_global_set_log_level(11)
1320
1321
@gnutls.library.types.gnutls_log_func
1322
def debug_gnutls(level, string):
1323
logger.debug(u"GnuTLS: %s", string[:-1])
1324
1325
(gnutls.library.functions
1326
.gnutls_global_set_log_function(debug_gnutls))
1327
1328
global main_loop
1329
# From the Avahi example code
1330
DBusGMainLoop(set_as_default=True )
1331
main_loop = gobject.MainLoop()
1332
bus = dbus.SystemBus()
1333
# End of Avahi example code
1334
if use_dbus:
1335
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
1336
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1337
service = AvahiService(name = server_settings[u"servicename"],
1338
servicetype = u"_mandos._tcp",
1339
protocol = protocol, bus = bus)
1340
if server_settings["interface"]:
1341
service.interface = (if_nametoindex
1342
(str(server_settings[u"interface"])))
1343
1344
client_class = Client
1345
if use_dbus:
1346
client_class = functools.partial(ClientDBus, bus = bus)
1347
tcp_server.clients.update(set(
1348
client_class(name = section,
1349
config= dict(client_config.items(section)))
1350
for section in client_config.sections()))
1351
if not tcp_server.clients:
1352
logger.warning(u"No clients defined")
1353
1354
if debug:
1355
# Redirect stdin so all checkers get /dev/null
1356
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1357
os.dup2(null, sys.stdin.fileno())
1358
if null > 2:
1359
os.close(null)
1360
else:
1361
# No console logging
1362
logger.removeHandler(console)
1363
# Close all input and output, do double fork, etc.
1364
daemon()
1365
1366
try:
1367
with closing(pidfile):
1368
pid = os.getpid()
1369
pidfile.write(str(pid) + "\n")
1370
del pidfile
1371
except IOError:
1372
logger.error(u"Could not write to file %r with PID %d",
1373
pidfilename, pid)
1374
except NameError:
1375
# "pidfile" was never created
1376
pass
1377
del pidfilename
1378
1379
def cleanup():
1380
"Cleanup function; run on exit"
1381
service.cleanup()
1382
1383
while tcp_server.clients:
1384
client = tcp_server.clients.pop()
1385
client.disable_hook = None
1386
client.disable()
1387
1388
atexit.register(cleanup)
1389
1390
if not debug:
1391
signal.signal(signal.SIGINT, signal.SIG_IGN)
1392
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1393
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1394
1395
if use_dbus:
1396
class MandosDBusService(dbus.service.Object):
1397
"""A D-Bus proxy object"""
1398
def __init__(self):
1399
dbus.service.Object.__init__(self, bus, u"/")
1400
_interface = u"se.bsnet.fukt.Mandos"
1401
1402
@dbus.service.signal(_interface, signature=u"oa{sv}")
1403
def ClientAdded(self, objpath, properties):
1404
"D-Bus signal"
1405
pass
1406
1407
@dbus.service.signal(_interface, signature=u"s")
1408
def ClientNotFound(self, fingerprint):
1409
"D-Bus signal"
1410
pass
1411
1412
@dbus.service.signal(_interface, signature=u"os")
1413
def ClientRemoved(self, objpath, name):
1414
"D-Bus signal"
1415
pass
1416
1417
@dbus.service.method(_interface, out_signature=u"ao")
1418
def GetAllClients(self):
1419
"D-Bus method"
1420
return dbus.Array(c.dbus_object_path
1421
for c in tcp_server.clients)
1422
1423
@dbus.service.method(_interface,
1424
out_signature=u"a{oa{sv}}")
1425
def GetAllClientsWithProperties(self):
1426
"D-Bus method"
1427
return dbus.Dictionary(
1428
((c.dbus_object_path, c.GetAllProperties())
1429
for c in tcp_server.clients),
1430
signature=u"oa{sv}")
1431
1432
@dbus.service.method(_interface, in_signature=u"o")
1433
def RemoveClient(self, object_path):
1434
"D-Bus method"
1435
for c in tcp_server.clients:
1436
if c.dbus_object_path == object_path:
1437
tcp_server.clients.remove(c)
1438
c.remove_from_connection()
1439
# Don't signal anything except ClientRemoved
1440
c.disable(signal=False)
1441
# Emit D-Bus signal
1442
self.ClientRemoved(object_path, c.name)
1443
return
1444
raise KeyError
1445
1446
del _interface
1447
1448
mandos_dbus_service = MandosDBusService()
1449
1450
for client in tcp_server.clients:
1451
if use_dbus:
1452
# Emit D-Bus signal
1453
mandos_dbus_service.ClientAdded(client.dbus_object_path,
1454
client.GetAllProperties())
1455
client.enable()
1456
1457
tcp_server.enable()
1458
tcp_server.server_activate()
1459
1460
# Find out what port we got
1461
service.port = tcp_server.socket.getsockname()[1]
1462
if use_ipv6:
1463
logger.info(u"Now listening on address %r, port %d,"
1464
" flowinfo %d, scope_id %d"
1465
% tcp_server.socket.getsockname())
1466
else: # IPv4
1467
logger.info(u"Now listening on address %r, port %d"
1468
% tcp_server.socket.getsockname())
1469
1470
#service.interface = tcp_server.socket.getsockname()[3]
1471
1472
try:
1473
# From the Avahi example code
1474
try:
1475
service.activate()
1476
except dbus.exceptions.DBusException, error:
1477
logger.critical(u"DBusException: %s", error)
1478
sys.exit(1)
1479
# End of Avahi example code
1480
1481
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
1482
lambda *args, **kwargs:
1483
(tcp_server.handle_request
1484
(*args[2:], **kwargs) or True))
1485
1486
logger.debug(u"Starting main loop")
1487
main_loop.run()
1488
except AvahiError, error:
1489
logger.critical(u"AvahiError: %s", error)
1490
sys.exit(1)
1491
except KeyboardInterrupt:
1492
if debug:
1493
print >> sys.stderr
1494
logger.debug(u"Server received KeyboardInterrupt")
1495
logger.debug(u"Server exiting")
1496
1497
if __name__ == '__main__':
247
# Parse the time arguments
248
try:
249
options.timeout = string_to_delta(options.timeout)
250
except ValueError:
251
parser.error("option --timeout: Unparseable time")
252
253
try:
254
options.interval = string_to_delta(options.interval)
255
except ValueError:
256
parser.error("option --interval: Unparseable time")
257
258
cert = gnutls.crypto.X509Certificate(open(options.cert).read())
259
key = gnutls.crypto.X509PrivateKey(open(options.key).read())
260
ca = gnutls.crypto.X509Certificate(open(options.ca).read())
261
crl = gnutls.crypto.X509CRL(open(options.crl).read())
262
cred = gnutls.connection.X509Credentials(cert, key, [ca], [crl])
263
264
# Parse config file
265
defaults = {}
266
client_config_object = ConfigParser.SafeConfigParser(defaults)
267
client_config_object.read("mandos-clients.conf")
268
clients = [Client(name=section, options=options,
269
**(dict(client_config_object.items(section))))
270
for section in client_config_object.sections()]
271
272
udp_server = IPv6_UDPServer((in6addr_any, options.port),
273
udp_handler,
274
options=options)
275
276
tcp_server = IPv6_TCPServer((in6addr_any, options.port),
277
tcp_handler,
278
options=options,
279
clients=clients,
280
credentials=cred)
281
282
while True:
283
try:
284
input, out, err = select.select((udp_server,
285
tcp_server), (), ())
286
if not input:
287
pass
288
else:
289
for obj in input:
290
obj.handle_request()
291
except KeyboardInterrupt:
292
break
293
294
# Cleanup here
295
for client in clients:
296
client.stop_checker()
297
298
299
if __name__ == "__main__":
1498
300
main()
301
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0