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- Committer: Teddy Hogeborn
- Date: 2009-02-23 11:52:42 UTC
- Revision ID: teddy@fukt.bsnet.se-20090223115242-5930ewin7m4o6zpr
* README (The Plugin System): Improve wording.
- files modified:
- Makefile
added
removed
mandos
6
6
# This program is partly derived from an example program for an Avahi
7
7
# service publisher, downloaded from
8
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".
9
# methods "add" and "remove" in the "AvahiService" class, the
10
# "server_state_changed" and "entry_group_state_changed" functions,
11
# and some lines in "main".
12
12
#
13
13
# Everything else is
14
14
# Copyright © 2008,2009 Teddy Hogeborn
33
33
34
34
from __future__ import division, with_statement, absolute_import
35
35
36
import SocketServer as socketserver
36
import SocketServer
37
37
import socket
38
38
import optparse
39
39
import datetime
44
44
import gnutls.library.functions
45
45
import gnutls.library.constants
46
46
import gnutls.library.types
47
import ConfigParser as configparser
47
import ConfigParser
48
48
import sys
49
49
import re
50
50
import os
51
51
import signal
52
from sets import Set
52
53
import subprocess
53
54
import atexit
54
55
import stat
56
57
import logging.handlers
57
58
import pwd
58
59
from contextlib import closing
59
import struct
60
import fcntl
61
import functools
62
60
63
61
import dbus
64
62
import dbus.service
68
66
import ctypes
69
67
import ctypes.util
70
68
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 = "1.0.11"
81
82
logger = logging.Logger(u'mandos')
69
version = "1.0.6"
70
71
logger = logging.Logger('mandos')
83
72
syslogger = (logging.handlers.SysLogHandler
84
73
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
85
74
address = "/dev/log"))
86
75
syslogger.setFormatter(logging.Formatter
87
(u'Mandos [%(process)d]: %(levelname)s:'
88
u' %(message)s'))
76
('Mandos [%(process)d]: %(levelname)s:'
77
' %(message)s'))
89
78
logger.addHandler(syslogger)
90
79
91
80
console = logging.StreamHandler()
92
console.setFormatter(logging.Formatter(u'%(name)s [%(process)d]:'
93
u' %(levelname)s:'
94
u' %(message)s'))
81
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
82
' %(levelname)s: %(message)s'))
95
83
logger.addHandler(console)
96
84
97
85
class AvahiError(Exception):
110
98
111
99
class AvahiService(object):
112
100
"""An Avahi (Zeroconf) service.
113
114
101
Attributes:
115
102
interface: integer; avahi.IF_UNSPEC or an interface index.
116
103
Used to optionally bind to the specified interface.
117
name: string; Example: u'Mandos'
118
type: string; Example: u'_mandos._tcp'.
104
name: string; Example: 'Mandos'
105
type: string; Example: '_mandos._tcp'.
119
106
See <http://www.dns-sd.org/ServiceTypes.html>
120
107
port: integer; what port to announce
121
108
TXT: list of strings; TXT record for the service
124
111
max_renames: integer; maximum number of renames
125
112
rename_count: integer; counter so we only rename after collisions
126
113
a sensible number of times
127
group: D-Bus Entry Group
128
server: D-Bus Server
129
bus: dbus.SystemBus()
130
114
"""
131
115
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
132
116
servicetype = None, port = None, TXT = None,
133
domain = u"", host = u"", max_renames = 32768,
134
protocol = avahi.PROTO_UNSPEC, bus = None):
117
domain = "", host = "", max_renames = 32768,
118
protocol = avahi.PROTO_UNSPEC):
135
119
self.interface = interface
136
120
self.name = name
137
121
self.type = servicetype
142
126
self.rename_count = 0
143
127
self.max_renames = max_renames
144
128
self.protocol = protocol
145
self.group = None # our entry group
146
self.server = None
147
self.bus = bus
148
129
def rename(self):
149
130
"""Derived from the Avahi example code"""
150
131
if self.rename_count >= self.max_renames:
152
133
u" after %i retries, exiting.",
153
134
self.rename_count)
154
135
raise AvahiServiceError(u"Too many renames")
155
self.name = self.server.GetAlternativeServiceName(self.name)
136
self.name = server.GetAlternativeServiceName(self.name)
156
137
logger.info(u"Changing Zeroconf service name to %r ...",
157
unicode(self.name))
138
str(self.name))
158
139
syslogger.setFormatter(logging.Formatter
159
(u'Mandos (%s) [%%(process)d]:'
160
u' %%(levelname)s: %%(message)s'
161
% self.name))
140
('Mandos (%s): %%(levelname)s:'
141
' %%(message)s' % self.name))
162
142
self.remove()
163
143
self.add()
164
144
self.rename_count += 1
165
145
def remove(self):
166
146
"""Derived from the Avahi example code"""
167
if self.group is not None:
168
self.group.Reset()
147
if group is not None:
148
group.Reset()
169
149
def add(self):
170
150
"""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)
151
global group
152
if group is None:
153
group = dbus.Interface(bus.get_object
154
(avahi.DBUS_NAME,
155
server.EntryGroupNew()),
156
avahi.DBUS_INTERFACE_ENTRY_GROUP)
157
group.connect_to_signal('StateChanged',
158
entry_group_state_changed)
178
159
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
227
class Client(object):
160
service.name, service.type)
161
group.AddService(
162
self.interface, # interface
163
self.protocol, # protocol
164
dbus.UInt32(0), # flags
165
self.name, self.type,
166
self.domain, self.host,
167
dbus.UInt16(self.port),
168
avahi.string_array_to_txt_array(self.TXT))
169
group.Commit()
170
171
# From the Avahi example code:
172
group = None # our entry group
173
# End of Avahi example code
174
175
176
def _datetime_to_dbus(dt, variant_level=0):
177
"""Convert a UTC datetime.datetime() to a D-Bus type."""
178
return dbus.String(dt.isoformat(), variant_level=variant_level)
179
180
181
class Client(dbus.service.Object):
228
182
"""A representation of a client host served by this server.
229
230
183
Attributes:
231
184
name: string; from the config file, used in log messages and
232
185
D-Bus identifiers
253
206
runtime with vars(self) as dict, so that for
254
207
instance %(name)s can be used in the command.
255
208
current_checker_command: string; current running checker_command
209
use_dbus: bool(); Whether to provide D-Bus interface and signals
210
dbus_object_path: dbus.ObjectPath ; only set if self.use_dbus
256
211
"""
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
212
def timeout_milliseconds(self):
266
213
"Return the 'timeout' attribute in milliseconds"
267
return self._datetime_to_milliseconds(self.timeout)
214
return ((self.timeout.days * 24 * 60 * 60 * 1000)
215
+ (self.timeout.seconds * 1000)
216
+ (self.timeout.microseconds // 1000))
268
217
269
218
def interval_milliseconds(self):
270
219
"Return the 'interval' attribute in milliseconds"
271
return self._datetime_to_milliseconds(self.interval)
220
return ((self.interval.days * 24 * 60 * 60 * 1000)
221
+ (self.interval.seconds * 1000)
222
+ (self.interval.microseconds // 1000))
272
223
273
def __init__(self, name = None, disable_hook=None, config=None):
224
def __init__(self, name = None, disable_hook=None, config=None,
225
use_dbus=True):
274
226
"""Note: the 'checker' key in 'config' sets the
275
227
'checker_command' attribute and *not* the 'checker'
276
228
attribute."""
278
230
if config is None:
279
231
config = {}
280
232
logger.debug(u"Creating client %r", self.name)
233
self.use_dbus = False # During __init__
281
234
# Uppercase and remove spaces from fingerprint for later
282
235
# comparison purposes with return value from the fingerprint()
283
236
# function
284
self.fingerprint = (config[u"fingerprint"].upper()
237
self.fingerprint = (config["fingerprint"].upper()
285
238
.replace(u" ", u""))
286
239
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:
240
if "secret" in config:
241
self.secret = config["secret"].decode(u"base64")
242
elif "secfile" in config:
290
243
with closing(open(os.path.expanduser
291
244
(os.path.expandvars
292
(config[u"secfile"])))) as secfile:
245
(config["secfile"])))) as secfile:
293
246
self.secret = secfile.read()
294
247
else:
295
248
raise TypeError(u"No secret or secfile for client %s"
296
249
% self.name)
297
self.host = config.get(u"host", u"")
250
self.host = config.get("host", "")
298
251
self.created = datetime.datetime.utcnow()
299
252
self.enabled = False
300
253
self.last_enabled = None
301
254
self.last_checked_ok = None
302
self.timeout = string_to_delta(config[u"timeout"])
303
self.interval = string_to_delta(config[u"interval"])
255
self.timeout = string_to_delta(config["timeout"])
256
self.interval = string_to_delta(config["interval"])
304
257
self.disable_hook = disable_hook
305
258
self.checker = None
306
259
self.checker_initiator_tag = None
307
260
self.disable_initiator_tag = None
308
261
self.checker_callback_tag = None
309
self.checker_command = config[u"checker"]
262
self.checker_command = config["checker"]
310
263
self.current_checker_command = None
311
264
self.last_connect = None
265
# Only now, when this client is initialized, can it show up on
266
# the D-Bus
267
self.use_dbus = use_dbus
268
if self.use_dbus:
269
self.dbus_object_path = (dbus.ObjectPath
270
("/clients/"
271
+ self.name.replace(".", "_")))
272
dbus.service.Object.__init__(self, bus,
273
self.dbus_object_path)
312
274
313
275
def enable(self):
314
276
"""Start this client's checker and timeout hooks"""
315
if getattr(self, u"enabled", False):
316
# Already enabled
317
return
318
277
self.last_enabled = datetime.datetime.utcnow()
319
278
# Schedule a new checker to be started an 'interval' from now,
320
279
# and every interval from then on.
328
287
(self.timeout_milliseconds(),
329
288
self.disable))
330
289
self.enabled = True
290
if self.use_dbus:
291
# Emit D-Bus signals
292
self.PropertyChanged(dbus.String(u"enabled"),
293
dbus.Boolean(True, variant_level=1))
294
self.PropertyChanged(dbus.String(u"last_enabled"),
295
(_datetime_to_dbus(self.last_enabled,
296
variant_level=1)))
331
297
332
298
def disable(self):
333
299
"""Disable this client."""
334
300
if not getattr(self, "enabled", False):
335
301
return False
336
302
logger.info(u"Disabling client %s", self.name)
337
if getattr(self, u"disable_initiator_tag", False):
303
if getattr(self, "disable_initiator_tag", False):
338
304
gobject.source_remove(self.disable_initiator_tag)
339
305
self.disable_initiator_tag = None
340
if getattr(self, u"checker_initiator_tag", False):
306
if getattr(self, "checker_initiator_tag", False):
341
307
gobject.source_remove(self.checker_initiator_tag)
342
308
self.checker_initiator_tag = None
343
309
self.stop_checker()
344
310
if self.disable_hook:
345
311
self.disable_hook(self)
346
312
self.enabled = False
313
if self.use_dbus:
314
# Emit D-Bus signal
315
self.PropertyChanged(dbus.String(u"enabled"),
316
dbus.Boolean(False, variant_level=1))
347
317
# Do not run this again if called by a gobject.timeout_add
348
318
return False
349
319
355
325
"""The checker has completed, so take appropriate actions."""
356
326
self.checker_callback_tag = None
357
327
self.checker = None
328
if self.use_dbus:
329
# Emit D-Bus signal
330
self.PropertyChanged(dbus.String(u"checker_running"),
331
dbus.Boolean(False, variant_level=1))
358
332
if os.WIFEXITED(condition):
359
333
exitstatus = os.WEXITSTATUS(condition)
360
334
if exitstatus == 0:
364
338
else:
365
339
logger.info(u"Checker for %(name)s failed",
366
340
vars(self))
341
if self.use_dbus:
342
# Emit D-Bus signal
343
self.CheckerCompleted(dbus.Int16(exitstatus),
344
dbus.Int64(condition),
345
dbus.String(command))
367
346
else:
368
347
logger.warning(u"Checker for %(name)s crashed?",
369
348
vars(self))
349
if self.use_dbus:
350
# Emit D-Bus signal
351
self.CheckerCompleted(dbus.Int16(-1),
352
dbus.Int64(condition),
353
dbus.String(command))
370
354
371
355
def checked_ok(self):
372
356
"""Bump up the timeout for this client.
373
374
357
This should only be called when the client has been seen,
375
358
alive and well.
376
359
"""
379
362
self.disable_initiator_tag = (gobject.timeout_add
380
363
(self.timeout_milliseconds(),
381
364
self.disable))
365
if self.use_dbus:
366
# Emit D-Bus signal
367
self.PropertyChanged(
368
dbus.String(u"last_checked_ok"),
369
(_datetime_to_dbus(self.last_checked_ok,
370
variant_level=1)))
382
371
383
372
def start_checker(self):
384
373
"""Start a new checker subprocess if one is not running.
385
386
374
If a checker already exists, leave it running and do
387
375
nothing."""
388
376
# The reason for not killing a running checker is that if we
398
386
if self.checker is not None:
399
387
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
400
388
if pid:
401
logger.warning(u"Checker was a zombie")
389
logger.warning("Checker was a zombie")
402
390
gobject.source_remove(self.checker_callback_tag)
403
391
self.checker_callback(pid, status,
404
392
self.current_checker_command)
409
397
command = self.checker_command % self.host
410
398
except TypeError:
411
399
# Escape attributes for the shell
412
escaped_attrs = dict((key,
413
re.escape(unicode(str(val),
414
errors=
415
u'replace')))
400
escaped_attrs = dict((key, re.escape(str(val)))
416
401
for key, val in
417
402
vars(self).iteritems())
418
403
try:
421
406
logger.error(u'Could not format string "%s":'
422
407
u' %s', self.checker_command, error)
423
408
return True # Try again later
424
self.current_checker_command = command
409
self.current_checker_command = command
425
410
try:
426
411
logger.info(u"Starting checker %r for %s",
427
412
command, self.name)
431
416
# always replaced by /dev/null.)
432
417
self.checker = subprocess.Popen(command,
433
418
close_fds=True,
434
shell=True, cwd=u"/")
419
shell=True, cwd="/")
420
if self.use_dbus:
421
# Emit D-Bus signal
422
self.CheckerStarted(command)
423
self.PropertyChanged(
424
dbus.String("checker_running"),
425
dbus.Boolean(True, variant_level=1))
435
426
self.checker_callback_tag = (gobject.child_watch_add
436
427
(self.checker.pid,
437
428
self.checker_callback,
453
444
if self.checker_callback_tag:
454
445
gobject.source_remove(self.checker_callback_tag)
455
446
self.checker_callback_tag = None
456
if getattr(self, u"checker", None) is None:
447
if getattr(self, "checker", None) is None:
457
448
return
458
449
logger.debug(u"Stopping checker for %(name)s", vars(self))
459
450
try:
465
456
if error.errno != errno.ESRCH: # No such process
466
457
raise
467
458
self.checker = None
459
if self.use_dbus:
460
self.PropertyChanged(dbus.String(u"checker_running"),
461
dbus.Boolean(False, variant_level=1))
468
462
469
463
def still_valid(self):
470
464
"""Has the timeout not yet passed for this client?"""
471
if not getattr(self, u"enabled", False):
465
if not getattr(self, "enabled", False):
472
466
return False
473
467
now = datetime.datetime.utcnow()
474
468
if self.last_checked_ok is None:
475
469
return now < (self.created + self.timeout)
476
470
else:
477
471
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
472
594
473
## D-Bus methods & signals
595
474
_interface = u"se.bsnet.fukt.Mandos.Client"
596
475
597
476
# CheckedOK - method
598
@dbus.service.method(_interface)
599
def CheckedOK(self):
600
return self.checked_ok()
477
CheckedOK = dbus.service.method(_interface)(checked_ok)
478
CheckedOK.__name__ = "CheckedOK"
601
479
602
480
# CheckerCompleted - signal
603
@dbus.service.signal(_interface, signature=u"nxs")
481
@dbus.service.signal(_interface, signature="nxs")
604
482
def CheckerCompleted(self, exitcode, waitstatus, command):
605
483
"D-Bus signal"
606
484
pass
607
485
608
486
# CheckerStarted - signal
609
@dbus.service.signal(_interface, signature=u"s")
487
@dbus.service.signal(_interface, signature="s")
610
488
def CheckerStarted(self, command):
611
489
"D-Bus signal"
612
490
pass
613
491
614
492
# GetAllProperties - method
615
@dbus.service.method(_interface, out_signature=u"a{sv}")
493
@dbus.service.method(_interface, out_signature="a{sv}")
616
494
def GetAllProperties(self):
617
495
"D-Bus method"
618
496
return dbus.Dictionary({
619
dbus.String(u"name"):
497
dbus.String("name"):
620
498
dbus.String(self.name, variant_level=1),
621
dbus.String(u"fingerprint"):
499
dbus.String("fingerprint"):
622
500
dbus.String(self.fingerprint, variant_level=1),
623
dbus.String(u"host"):
501
dbus.String("host"):
624
502
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)
503
dbus.String("created"):
504
_datetime_to_dbus(self.created, variant_level=1),
505
dbus.String("last_enabled"):
506
(_datetime_to_dbus(self.last_enabled,
507
variant_level=1)
631
508
if self.last_enabled is not None
632
509
else dbus.Boolean(False, variant_level=1)),
633
dbus.String(u"enabled"):
510
dbus.String("enabled"):
634
511
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)
512
dbus.String("last_checked_ok"):
513
(_datetime_to_dbus(self.last_checked_ok,
514
variant_level=1)
638
515
if self.last_checked_ok is not None
639
516
else dbus.Boolean (False, variant_level=1)),
640
dbus.String(u"timeout"):
517
dbus.String("timeout"):
641
518
dbus.UInt64(self.timeout_milliseconds(),
642
519
variant_level=1),
643
dbus.String(u"interval"):
520
dbus.String("interval"):
644
521
dbus.UInt64(self.interval_milliseconds(),
645
522
variant_level=1),
646
dbus.String(u"checker"):
523
dbus.String("checker"):
647
524
dbus.String(self.checker_command,
648
525
variant_level=1),
649
dbus.String(u"checker_running"):
526
dbus.String("checker_running"):
650
527
dbus.Boolean(self.checker is not None,
651
528
variant_level=1),
652
dbus.String(u"object_path"):
529
dbus.String("object_path"):
653
530
dbus.ObjectPath(self.dbus_object_path,
654
531
variant_level=1)
655
}, signature=u"sv")
532
}, signature="sv")
656
533
657
534
# IsStillValid - method
658
@dbus.service.method(_interface, out_signature=u"b")
659
def IsStillValid(self):
660
return self.still_valid()
535
IsStillValid = (dbus.service.method(_interface, out_signature="b")
536
(still_valid))
537
IsStillValid.__name__ = "IsStillValid"
661
538
662
539
# PropertyChanged - signal
663
@dbus.service.signal(_interface, signature=u"sv")
540
@dbus.service.signal(_interface, signature="sv")
664
541
def PropertyChanged(self, property, value):
665
542
"D-Bus signal"
666
543
pass
667
544
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
545
# SetChecker - method
681
@dbus.service.method(_interface, in_signature=u"s")
546
@dbus.service.method(_interface, in_signature="s")
682
547
def SetChecker(self, checker):
683
548
"D-Bus setter method"
684
549
self.checker_command = checker
688
553
variant_level=1))
689
554
690
555
# SetHost - method
691
@dbus.service.method(_interface, in_signature=u"s")
556
@dbus.service.method(_interface, in_signature="s")
692
557
def SetHost(self, host):
693
558
"D-Bus setter method"
694
559
self.host = host
697
562
dbus.String(self.host, variant_level=1))
698
563
699
564
# SetInterval - method
700
@dbus.service.method(_interface, in_signature=u"t")
565
@dbus.service.method(_interface, in_signature="t")
701
566
def SetInterval(self, milliseconds):
702
567
self.interval = datetime.timedelta(0, 0, 0, milliseconds)
703
568
# Emit D-Bus signal
706
571
variant_level=1)))
707
572
708
573
# SetSecret - method
709
@dbus.service.method(_interface, in_signature=u"ay",
574
@dbus.service.method(_interface, in_signature="ay",
710
575
byte_arrays=True)
711
576
def SetSecret(self, secret):
712
577
"D-Bus setter method"
713
578
self.secret = str(secret)
714
579
715
580
# SetTimeout - method
716
@dbus.service.method(_interface, in_signature=u"t")
581
@dbus.service.method(_interface, in_signature="t")
717
582
def SetTimeout(self, milliseconds):
718
583
self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
719
584
# Emit D-Bus signal
722
587
variant_level=1)))
723
588
724
589
# Enable - method
725
@dbus.service.method(_interface)
726
def Enable(self):
727
"D-Bus method"
728
self.enable()
590
Enable = dbus.service.method(_interface)(enable)
591
Enable.__name__ = "Enable"
729
592
730
593
# StartChecker - method
731
594
@dbus.service.method(_interface)
740
603
self.disable()
741
604
742
605
# StopChecker - method
743
@dbus.service.method(_interface)
744
def StopChecker(self):
745
self.stop_checker()
606
StopChecker = dbus.service.method(_interface)(stop_checker)
607
StopChecker.__name__ = "StopChecker"
746
608
747
609
del _interface
748
610
749
611
750
class ClientHandler(socketserver.BaseRequestHandler, object):
751
"""A class to handle client connections.
752
753
Instantiated once for each connection to handle it.
612
def peer_certificate(session):
613
"Return the peer's OpenPGP certificate as a bytestring"
614
# If not an OpenPGP certificate...
615
if (gnutls.library.functions
616
.gnutls_certificate_type_get(session._c_object)
617
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
618
# ...do the normal thing
619
return session.peer_certificate
620
list_size = ctypes.c_uint(1)
621
cert_list = (gnutls.library.functions
622
.gnutls_certificate_get_peers
623
(session._c_object, ctypes.byref(list_size)))
624
if not bool(cert_list) and list_size.value != 0:
625
raise gnutls.errors.GNUTLSError("error getting peer"
626
" certificate")
627
if list_size.value == 0:
628
return None
629
cert = cert_list[0]
630
return ctypes.string_at(cert.data, cert.size)
631
632
633
def fingerprint(openpgp):
634
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
635
# New GnuTLS "datum" with the OpenPGP public key
636
datum = (gnutls.library.types
637
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
638
ctypes.POINTER
639
(ctypes.c_ubyte)),
640
ctypes.c_uint(len(openpgp))))
641
# New empty GnuTLS certificate
642
crt = gnutls.library.types.gnutls_openpgp_crt_t()
643
(gnutls.library.functions
644
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
645
# Import the OpenPGP public key into the certificate
646
(gnutls.library.functions
647
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
648
gnutls.library.constants
649
.GNUTLS_OPENPGP_FMT_RAW))
650
# Verify the self signature in the key
651
crtverify = ctypes.c_uint()
652
(gnutls.library.functions
653
.gnutls_openpgp_crt_verify_self(crt, 0, ctypes.byref(crtverify)))
654
if crtverify.value != 0:
655
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
656
raise gnutls.errors.CertificateSecurityError("Verify failed")
657
# New buffer for the fingerprint
658
buf = ctypes.create_string_buffer(20)
659
buf_len = ctypes.c_size_t()
660
# Get the fingerprint from the certificate into the buffer
661
(gnutls.library.functions
662
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
663
ctypes.byref(buf_len)))
664
# Deinit the certificate
665
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
666
# Convert the buffer to a Python bytestring
667
fpr = ctypes.string_at(buf, buf_len.value)
668
# Convert the bytestring to hexadecimal notation
669
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
670
return hex_fpr
671
672
673
class TCP_handler(SocketServer.BaseRequestHandler, object):
674
"""A TCP request handler class.
675
Instantiated by IPv6_TCPServer for each request to handle it.
754
676
Note: This will run in its own forked process."""
755
677
756
678
def handle(self):
757
679
logger.info(u"TCP connection from: %s",
758
680
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:
852
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):
681
session = (gnutls.connection
682
.ClientSession(self.request,
683
gnutls.connection
684
.X509Credentials()))
685
686
line = self.request.makefile().readline()
687
logger.debug(u"Protocol version: %r", line)
688
try:
689
if int(line.strip().split()[0]) > 1:
690
raise RuntimeError
691
except (ValueError, IndexError, RuntimeError), error:
692
logger.error(u"Unknown protocol version: %s", error)
693
return
694
695
# Note: gnutls.connection.X509Credentials is really a generic
696
# GnuTLS certificate credentials object so long as no X.509
697
# keys are added to it. Therefore, we can use it here despite
698
# using OpenPGP certificates.
699
700
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
701
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
702
# "+DHE-DSS"))
703
# Use a fallback default, since this MUST be set.
704
priority = self.server.settings.get("priority", "NORMAL")
705
(gnutls.library.functions
706
.gnutls_priority_set_direct(session._c_object,
707
priority, None))
708
709
try:
710
session.handshake()
711
except gnutls.errors.GNUTLSError, error:
712
logger.warning(u"Handshake failed: %s", error)
713
# Do not run session.bye() here: the session is not
714
# established. Just abandon the request.
715
return
716
logger.debug(u"Handshake succeeded")
717
try:
718
fpr = fingerprint(peer_certificate(session))
719
except (TypeError, gnutls.errors.GNUTLSError), error:
720
logger.warning(u"Bad certificate: %s", error)
721
session.bye()
722
return
723
logger.debug(u"Fingerprint: %s", fpr)
724
725
for c in self.server.clients:
726
if c.fingerprint == fpr:
727
client = c
728
break
729
else:
730
logger.warning(u"Client not found for fingerprint: %s",
731
fpr)
732
session.bye()
733
return
734
# Have to check if client.still_valid(), since it is possible
735
# that the client timed out while establishing the GnuTLS
736
# session.
737
if not client.still_valid():
738
logger.warning(u"Client %(name)s is invalid",
739
vars(client))
740
session.bye()
741
return
742
## This won't work here, since we're in a fork.
743
# client.checked_ok()
744
sent_size = 0
745
while sent_size < len(client.secret):
746
sent = session.send(client.secret[sent_size:])
747
logger.debug(u"Sent: %d, remaining: %d",
748
sent, len(client.secret)
749
- (sent_size + sent))
750
sent_size += sent
751
session.bye()
752
753
754
class IPv6_TCPServer(SocketServer.ForkingMixIn,
755
SocketServer.TCPServer, object):
918
756
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
919
920
757
Attributes:
758
settings: Server settings
759
clients: Set() of Client objects
921
760
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
761
"""
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)
762
address_family = socket.AF_INET6
763
def __init__(self, *args, **kwargs):
764
if "settings" in kwargs:
765
self.settings = kwargs["settings"]
766
del kwargs["settings"]
767
if "clients" in kwargs:
768
self.clients = kwargs["clients"]
769
del kwargs["clients"]
770
if "use_ipv6" in kwargs:
771
if not kwargs["use_ipv6"]:
772
self.address_family = socket.AF_INET
773
del kwargs["use_ipv6"]
774
self.enabled = False
775
super(IPv6_TCPServer, self).__init__(*args, **kwargs)
932
776
def server_bind(self):
933
777
"""This overrides the normal server_bind() function
934
778
to bind to an interface if one was specified, and also NOT to
935
779
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:
942
try:
943
self.socket.setsockopt(socket.SOL_SOCKET,
944
SO_BINDTODEVICE,
945
str(self.interface
946
+ u'\0'))
947
except socket.error, error:
948
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)
956
else:
957
raise
780
if self.settings["interface"]:
781
# 25 is from /usr/include/asm-i486/socket.h
782
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
783
try:
784
self.socket.setsockopt(socket.SOL_SOCKET,
785
SO_BINDTODEVICE,
786
self.settings["interface"])
787
except socket.error, error:
788
if error[0] == errno.EPERM:
789
logger.error(u"No permission to"
790
u" bind to interface %s",
791
self.settings["interface"])
792
else:
793
raise
958
794
# Only bind(2) the socket if we really need to.
959
795
if self.server_address[0] or self.server_address[1]:
960
796
if not self.server_address[0]:
961
797
if self.address_family == socket.AF_INET6:
962
any_address = u"::" # in6addr_any
798
any_address = "::" # in6addr_any
963
799
else:
964
800
any_address = socket.INADDR_ANY
965
801
self.server_address = (any_address,
967
803
elif not self.server_address[1]:
968
804
self.server_address = (self.server_address[0],
969
805
0)
970
# if self.interface:
806
# if self.settings["interface"]:
971
807
# self.server_address = (self.server_address[0],
972
808
# 0, # port
973
809
# 0, # flowinfo
974
810
# 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
clients: set of Client objects
987
gnutls_priority GnuTLS priority string
988
use_dbus: Boolean; to emit D-Bus signals or not
989
990
Assumes a gobject.MainLoop event loop.
991
"""
992
def __init__(self, server_address, RequestHandlerClass,
993
interface=None, use_ipv6=True, clients=None,
994
gnutls_priority=None, use_dbus=True):
995
self.enabled = False
996
self.clients = clients
997
if self.clients is None:
998
self.clients = set()
999
self.use_dbus = use_dbus
1000
self.gnutls_priority = gnutls_priority
1001
IPv6_TCPServer.__init__(self, server_address,
1002
RequestHandlerClass,
1003
interface = interface,
1004
use_ipv6 = use_ipv6)
811
# (self.settings
812
# ["interface"]))
813
return super(IPv6_TCPServer, self).server_bind()
1005
814
def server_activate(self):
1006
815
if self.enabled:
1007
return socketserver.TCPServer.server_activate(self)
816
return super(IPv6_TCPServer, self).server_activate()
1008
817
def enable(self):
1009
818
self.enabled = True
1010
def add_pipe(self, pipe):
1011
# Call "handle_ipc" for both data and EOF events
1012
gobject.io_add_watch(pipe, gobject.IO_IN | gobject.IO_HUP,
1013
self.handle_ipc)
1014
def handle_ipc(self, source, condition, file_objects={}):
1015
condition_names = {
1016
gobject.IO_IN: u"IN", # There is data to read.
1017
gobject.IO_OUT: u"OUT", # Data can be written (without
1018
# blocking).
1019
gobject.IO_PRI: u"PRI", # There is urgent data to read.
1020
gobject.IO_ERR: u"ERR", # Error condition.
1021
gobject.IO_HUP: u"HUP" # Hung up (the connection has been
1022
# broken, usually for pipes and
1023
# sockets).
1024
}
1025
conditions_string = ' | '.join(name
1026
for cond, name in
1027
condition_names.iteritems()
1028
if cond & condition)
1029
logger.debug(u"Handling IPC: FD = %d, condition = %s", source,
1030
conditions_string)
1031
1032
# Turn the pipe file descriptor into a Python file object
1033
if source not in file_objects:
1034
file_objects[source] = os.fdopen(source, u"r", 1)
1035
1036
# Read a line from the file object
1037
cmdline = file_objects[source].readline()
1038
if not cmdline: # Empty line means end of file
1039
# close the IPC pipe
1040
file_objects[source].close()
1041
del file_objects[source]
1042
1043
# Stop calling this function
1044
return False
1045
1046
logger.debug(u"IPC command: %r", cmdline)
1047
1048
# Parse and act on command
1049
cmd, args = cmdline.rstrip(u"\r\n").split(None, 1)
1050
1051
if cmd == u"NOTFOUND":
1052
logger.warning(u"Client not found for fingerprint: %s",
1053
args)
1054
if self.use_dbus:
1055
# Emit D-Bus signal
1056
mandos_dbus_service.ClientNotFound(args)
1057
elif cmd == u"INVALID":
1058
for client in self.clients:
1059
if client.name == args:
1060
logger.warning(u"Client %s is invalid", args)
1061
if self.use_dbus:
1062
# Emit D-Bus signal
1063
client.Rejected()
1064
break
1065
else:
1066
logger.error(u"Unknown client %s is invalid", args)
1067
elif cmd == u"SENDING":
1068
for client in self.clients:
1069
if client.name == args:
1070
logger.info(u"Sending secret to %s", client.name)
1071
client.checked_ok()
1072
if self.use_dbus:
1073
# Emit D-Bus signal
1074
client.ReceivedSecret()
1075
break
1076
else:
1077
logger.error(u"Sending secret to unknown client %s",
1078
args)
1079
else:
1080
logger.error(u"Unknown IPC command: %r", cmdline)
1081
1082
# Keep calling this function
1083
return True
1084
819
1085
820
1086
821
def string_to_delta(interval):
1087
822
"""Parse a string and return a datetime.timedelta
1088
823
1089
>>> string_to_delta(u'7d')
824
>>> string_to_delta('7d')
1090
825
datetime.timedelta(7)
1091
>>> string_to_delta(u'60s')
826
>>> string_to_delta('60s')
1092
827
datetime.timedelta(0, 60)
1093
>>> string_to_delta(u'60m')
828
>>> string_to_delta('60m')
1094
829
datetime.timedelta(0, 3600)
1095
>>> string_to_delta(u'24h')
830
>>> string_to_delta('24h')
1096
831
datetime.timedelta(1)
1097
832
>>> string_to_delta(u'1w')
1098
833
datetime.timedelta(7)
1099
>>> string_to_delta(u'5m 30s')
834
>>> string_to_delta('5m 30s')
1100
835
datetime.timedelta(0, 330)
1101
836
"""
1102
837
timevalue = datetime.timedelta(0)
1122
857
return timevalue
1123
858
1124
859
860
def server_state_changed(state):
861
"""Derived from the Avahi example code"""
862
if state == avahi.SERVER_COLLISION:
863
logger.error(u"Zeroconf server name collision")
864
service.remove()
865
elif state == avahi.SERVER_RUNNING:
866
service.add()
867
868
869
def entry_group_state_changed(state, error):
870
"""Derived from the Avahi example code"""
871
logger.debug(u"Avahi state change: %i", state)
872
873
if state == avahi.ENTRY_GROUP_ESTABLISHED:
874
logger.debug(u"Zeroconf service established.")
875
elif state == avahi.ENTRY_GROUP_COLLISION:
876
logger.warning(u"Zeroconf service name collision.")
877
service.rename()
878
elif state == avahi.ENTRY_GROUP_FAILURE:
879
logger.critical(u"Avahi: Error in group state changed %s",
880
unicode(error))
881
raise AvahiGroupError(u"State changed: %s" % unicode(error))
882
1125
883
def if_nametoindex(interface):
1126
"""Call the C function if_nametoindex(), or equivalent
1127
1128
Note: This function cannot accept a unicode string."""
884
"""Call the C function if_nametoindex(), or equivalent"""
1129
885
global if_nametoindex
1130
886
try:
1131
887
if_nametoindex = (ctypes.cdll.LoadLibrary
1132
(ctypes.util.find_library(u"c"))
888
(ctypes.util.find_library("c"))
1133
889
.if_nametoindex)
1134
890
except (OSError, AttributeError):
1135
logger.warning(u"Doing if_nametoindex the hard way")
891
if "struct" not in sys.modules:
892
import struct
893
if "fcntl" not in sys.modules:
894
import fcntl
1136
895
def if_nametoindex(interface):
1137
896
"Get an interface index the hard way, i.e. using fcntl()"
1138
897
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1139
898
with closing(socket.socket()) as s:
1140
899
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1141
struct.pack(str(u"16s16x"),
1142
interface))
1143
interface_index = struct.unpack(str(u"I"),
1144
ifreq[16:20])[0]
900
struct.pack("16s16x", interface))
901
interface_index = struct.unpack("I", ifreq[16:20])[0]
1145
902
return interface_index
1146
903
return if_nametoindex(interface)
1147
904
1148
905
1149
906
def daemon(nochdir = False, noclose = False):
1150
907
"""See daemon(3). Standard BSD Unix function.
1151
1152
908
This should really exist as os.daemon, but it doesn't (yet)."""
1153
909
if os.fork():
1154
910
sys.exit()
1155
911
os.setsid()
1156
912
if not nochdir:
1157
os.chdir(u"/")
913
os.chdir("/")
1158
914
if os.fork():
1159
915
sys.exit()
1160
916
if not noclose:
1162
918
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1163
919
if not stat.S_ISCHR(os.fstat(null).st_mode):
1164
920
raise OSError(errno.ENODEV,
1165
u"/dev/null not a character device")
921
"/dev/null not a character device")
1166
922
os.dup2(null, sys.stdin.fileno())
1167
923
os.dup2(null, sys.stdout.fileno())
1168
924
os.dup2(null, sys.stderr.fileno())
1171
927
1172
928
1173
929
def main():
1174
1175
######################################################################
1176
# Parsing of options, both command line and config file
1177
1178
930
parser = optparse.OptionParser(version = "%%prog %s" % version)
1179
parser.add_option("-i", u"--interface", type=u"string",
1180
metavar="IF", help=u"Bind to interface IF")
1181
parser.add_option("-a", u"--address", type=u"string",
1182
help=u"Address to listen for requests on")
1183
parser.add_option("-p", u"--port", type=u"int",
1184
help=u"Port number to receive requests on")
1185
parser.add_option("--check", action=u"store_true",
1186
help=u"Run self-test")
1187
parser.add_option("--debug", action=u"store_true",
1188
help=u"Debug mode; run in foreground and log to"
1189
u" terminal")
1190
parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1191
u" priority string (see GnuTLS documentation)")
1192
parser.add_option("--servicename", type=u"string",
1193
metavar=u"NAME", help=u"Zeroconf service name")
1194
parser.add_option("--configdir", type=u"string",
1195
default=u"/etc/mandos", metavar=u"DIR",
1196
help=u"Directory to search for configuration"
1197
u" files")
1198
parser.add_option("--no-dbus", action=u"store_false",
1199
dest=u"use_dbus", help=u"Do not provide D-Bus"
1200
u" system bus interface")
1201
parser.add_option("--no-ipv6", action=u"store_false",
1202
dest=u"use_ipv6", help=u"Do not use IPv6")
931
parser.add_option("-i", "--interface", type="string",
932
metavar="IF", help="Bind to interface IF")
933
parser.add_option("-a", "--address", type="string",
934
help="Address to listen for requests on")
935
parser.add_option("-p", "--port", type="int",
936
help="Port number to receive requests on")
937
parser.add_option("--check", action="store_true",
938
help="Run self-test")
939
parser.add_option("--debug", action="store_true",
940
help="Debug mode; run in foreground and log to"
941
" terminal")
942
parser.add_option("--priority", type="string", help="GnuTLS"
943
" priority string (see GnuTLS documentation)")
944
parser.add_option("--servicename", type="string", metavar="NAME",
945
help="Zeroconf service name")
946
parser.add_option("--configdir", type="string",
947
default="/etc/mandos", metavar="DIR",
948
help="Directory to search for configuration"
949
" files")
950
parser.add_option("--no-dbus", action="store_false",
951
dest="use_dbus",
952
help="Do not provide D-Bus system bus"
953
" interface")
954
parser.add_option("--no-ipv6", action="store_false",
955
dest="use_ipv6", help="Do not use IPv6")
1203
956
options = parser.parse_args()[0]
1204
957
1205
958
if options.check:
1208
961
sys.exit()
1209
962
1210
963
# Default values for config file for server-global settings
1211
server_defaults = { u"interface": u"",
1212
u"address": u"",
1213
u"port": u"",
1214
u"debug": u"False",
1215
u"priority":
1216
u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1217
u"servicename": u"Mandos",
1218
u"use_dbus": u"True",
1219
u"use_ipv6": u"True",
964
server_defaults = { "interface": "",
965
"address": "",
966
"port": "",
967
"debug": "False",
968
"priority":
969
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
970
"servicename": "Mandos",
971
"use_dbus": "True",
972
"use_ipv6": "True",
1220
973
}
1221
974
1222
975
# Parse config file for server-global settings
1223
server_config = configparser.SafeConfigParser(server_defaults)
976
server_config = ConfigParser.SafeConfigParser(server_defaults)
1224
977
del server_defaults
1225
server_config.read(os.path.join(options.configdir,
1226
u"mandos.conf"))
978
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1227
979
# Convert the SafeConfigParser object to a dict
1228
980
server_settings = server_config.defaults()
1229
981
# Use the appropriate methods on the non-string config options
1230
for option in (u"debug", u"use_dbus", u"use_ipv6"):
1231
server_settings[option] = server_config.getboolean(u"DEFAULT",
1232
option)
982
server_settings["debug"] = server_config.getboolean("DEFAULT",
983
"debug")
984
server_settings["use_dbus"] = server_config.getboolean("DEFAULT",
985
"use_dbus")
986
server_settings["use_ipv6"] = server_config.getboolean("DEFAULT",
987
"use_ipv6")
1233
988
if server_settings["port"]:
1234
server_settings["port"] = server_config.getint(u"DEFAULT",
1235
u"port")
989
server_settings["port"] = server_config.getint("DEFAULT",
990
"port")
1236
991
del server_config
1237
992
1238
993
# Override the settings from the config file with command line
1239
994
# options, if set.
1240
for option in (u"interface", u"address", u"port", u"debug",
1241
u"priority", u"servicename", u"configdir",
1242
u"use_dbus", u"use_ipv6"):
995
for option in ("interface", "address", "port", "debug",
996
"priority", "servicename", "configdir",
997
"use_dbus", "use_ipv6"):
1243
998
value = getattr(options, option)
1244
999
if value is not None:
1245
1000
server_settings[option] = value
1246
1001
del options
1247
# Force all strings to be unicode
1248
for option in server_settings.keys():
1249
if type(server_settings[option]) is str:
1250
server_settings[option] = unicode(server_settings[option])
1251
1002
# Now we have our good server settings in "server_settings"
1252
1003
1253
##################################################################
1254
1255
1004
# For convenience
1256
debug = server_settings[u"debug"]
1257
use_dbus = server_settings[u"use_dbus"]
1258
use_ipv6 = server_settings[u"use_ipv6"]
1005
debug = server_settings["debug"]
1006
use_dbus = server_settings["use_dbus"]
1007
use_ipv6 = server_settings["use_ipv6"]
1259
1008
1260
1009
if not debug:
1261
1010
syslogger.setLevel(logging.WARNING)
1262
1011
console.setLevel(logging.WARNING)
1263
1012
1264
if server_settings[u"servicename"] != u"Mandos":
1013
if server_settings["servicename"] != "Mandos":
1265
1014
syslogger.setFormatter(logging.Formatter
1266
(u'Mandos (%s) [%%(process)d]:'
1267
u' %%(levelname)s: %%(message)s'
1268
% server_settings[u"servicename"]))
1015
('Mandos (%s): %%(levelname)s:'
1016
' %%(message)s'
1017
% server_settings["servicename"]))
1269
1018
1270
1019
# Parse config file with clients
1271
client_defaults = { u"timeout": u"1h",
1272
u"interval": u"5m",
1273
u"checker": u"fping -q -- %%(host)s",
1274
u"host": u"",
1020
client_defaults = { "timeout": "1h",
1021
"interval": "5m",
1022
"checker": "fping -q -- %%(host)s",
1023
"host": "",
1275
1024
}
1276
client_config = configparser.SafeConfigParser(client_defaults)
1277
client_config.read(os.path.join(server_settings[u"configdir"],
1278
u"clients.conf"))
1279
1280
global mandos_dbus_service
1281
mandos_dbus_service = None
1282
1283
tcp_server = MandosServer((server_settings[u"address"],
1284
server_settings[u"port"]),
1285
ClientHandler,
1286
interface=server_settings[u"interface"],
1287
use_ipv6=use_ipv6,
1288
gnutls_priority=
1289
server_settings[u"priority"],
1290
use_dbus=use_dbus)
1291
pidfilename = u"/var/run/mandos.pid"
1025
client_config = ConfigParser.SafeConfigParser(client_defaults)
1026
client_config.read(os.path.join(server_settings["configdir"],
1027
"clients.conf"))
1028
1029
clients = Set()
1030
tcp_server = IPv6_TCPServer((server_settings["address"],
1031
server_settings["port"]),
1032
TCP_handler,
1033
settings=server_settings,
1034
clients=clients, use_ipv6=use_ipv6)
1035
pidfilename = "/var/run/mandos.pid"
1292
1036
try:
1293
pidfile = open(pidfilename, u"w")
1037
pidfile = open(pidfilename, "w")
1294
1038
except IOError:
1295
logger.error(u"Could not open file %r", pidfilename)
1039
logger.error("Could not open file %r", pidfilename)
1296
1040
1297
1041
try:
1298
uid = pwd.getpwnam(u"_mandos").pw_uid
1299
gid = pwd.getpwnam(u"_mandos").pw_gid
1042
uid = pwd.getpwnam("_mandos").pw_uid
1043
gid = pwd.getpwnam("_mandos").pw_gid
1300
1044
except KeyError:
1301
1045
try:
1302
uid = pwd.getpwnam(u"mandos").pw_uid
1303
gid = pwd.getpwnam(u"mandos").pw_gid
1046
uid = pwd.getpwnam("mandos").pw_uid
1047
gid = pwd.getpwnam("mandos").pw_gid
1304
1048
except KeyError:
1305
1049
try:
1306
uid = pwd.getpwnam(u"nobody").pw_uid
1307
gid = pwd.getpwnam(u"nobody").pw_gid
1050
uid = pwd.getpwnam("nobody").pw_uid
1051
gid = pwd.getpwnam("nogroup").pw_gid
1308
1052
except KeyError:
1309
1053
uid = 65534
1310
1054
gid = 65534
1323
1067
1324
1068
@gnutls.library.types.gnutls_log_func
1325
1069
def debug_gnutls(level, string):
1326
logger.debug(u"GnuTLS: %s", string[:-1])
1070
logger.debug("GnuTLS: %s", string[:-1])
1327
1071
1328
1072
(gnutls.library.functions
1329
1073
.gnutls_global_set_log_function(debug_gnutls))
1330
1074
1075
global service
1076
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1077
service = AvahiService(name = server_settings["servicename"],
1078
servicetype = "_mandos._tcp",
1079
protocol = protocol)
1080
if server_settings["interface"]:
1081
service.interface = (if_nametoindex
1082
(server_settings["interface"]))
1083
1331
1084
global main_loop
1085
global bus
1086
global server
1332
1087
# From the Avahi example code
1333
1088
DBusGMainLoop(set_as_default=True )
1334
1089
main_loop = gobject.MainLoop()
1335
1090
bus = dbus.SystemBus()
1091
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
1092
avahi.DBUS_PATH_SERVER),
1093
avahi.DBUS_INTERFACE_SERVER)
1336
1094
# End of Avahi example code
1337
1095
if use_dbus:
1338
1096
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
1339
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1340
service = AvahiService(name = server_settings[u"servicename"],
1341
servicetype = u"_mandos._tcp",
1342
protocol = protocol, bus = bus)
1343
if server_settings["interface"]:
1344
service.interface = (if_nametoindex
1345
(str(server_settings[u"interface"])))
1346
1097
1347
client_class = Client
1348
if use_dbus:
1349
client_class = functools.partial(ClientDBus, bus = bus)
1350
tcp_server.clients.update(set(
1351
client_class(name = section,
1352
config= dict(client_config.items(section)))
1353
for section in client_config.sections()))
1354
if not tcp_server.clients:
1098
clients.update(Set(Client(name = section,
1099
config
1100
= dict(client_config.items(section)),
1101
use_dbus = use_dbus)
1102
for section in client_config.sections()))
1103
if not clients:
1355
1104
logger.warning(u"No clients defined")
1356
1105
1357
1106
if debug:
1367
1116
daemon()
1368
1117
1369
1118
try:
1370
with closing(pidfile):
1371
pid = os.getpid()
1372
pidfile.write(str(pid) + "\n")
1119
pid = os.getpid()
1120
pidfile.write(str(pid) + "\n")
1121
pidfile.close()
1373
1122
del pidfile
1374
1123
except IOError:
1375
1124
logger.error(u"Could not write to file %r with PID %d",
1381
1130
1382
1131
def cleanup():
1383
1132
"Cleanup function; run on exit"
1384
service.cleanup()
1133
global group
1134
# From the Avahi example code
1135
if not group is None:
1136
group.Free()
1137
group = None
1138
# End of Avahi example code
1385
1139
1386
while tcp_server.clients:
1387
client = tcp_server.clients.pop()
1140
while clients:
1141
client = clients.pop()
1388
1142
client.disable_hook = None
1389
1143
client.disable()
1390
1144
1396
1150
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1397
1151
1398
1152
if use_dbus:
1399
class MandosDBusService(dbus.service.Object):
1153
class MandosServer(dbus.service.Object):
1400
1154
"""A D-Bus proxy object"""
1401
1155
def __init__(self):
1402
dbus.service.Object.__init__(self, bus, u"/")
1156
dbus.service.Object.__init__(self, bus, "/")
1403
1157
_interface = u"se.bsnet.fukt.Mandos"
1404
1158
1405
@dbus.service.signal(_interface, signature=u"oa{sv}")
1159
@dbus.service.signal(_interface, signature="oa{sv}")
1406
1160
def ClientAdded(self, objpath, properties):
1407
1161
"D-Bus signal"
1408
1162
pass
1409
1163
1410
@dbus.service.signal(_interface, signature=u"s")
1411
def ClientNotFound(self, fingerprint):
1412
"D-Bus signal"
1413
pass
1414
1415
@dbus.service.signal(_interface, signature=u"os")
1164
@dbus.service.signal(_interface, signature="os")
1416
1165
def ClientRemoved(self, objpath, name):
1417
1166
"D-Bus signal"
1418
1167
pass
1419
1168
1420
@dbus.service.method(_interface, out_signature=u"ao")
1169
@dbus.service.method(_interface, out_signature="ao")
1421
1170
def GetAllClients(self):
1422
1171
"D-Bus method"
1423
return dbus.Array(c.dbus_object_path
1424
for c in tcp_server.clients)
1172
return dbus.Array(c.dbus_object_path for c in clients)
1425
1173
1426
@dbus.service.method(_interface,
1427
out_signature=u"a{oa{sv}}")
1174
@dbus.service.method(_interface, out_signature="a{oa{sv}}")
1428
1175
def GetAllClientsWithProperties(self):
1429
1176
"D-Bus method"
1430
1177
return dbus.Dictionary(
1431
1178
((c.dbus_object_path, c.GetAllProperties())
1432
for c in tcp_server.clients),
1433
signature=u"oa{sv}")
1179
for c in clients),
1180
signature="oa{sv}")
1434
1181
1435
@dbus.service.method(_interface, in_signature=u"o")
1182
@dbus.service.method(_interface, in_signature="o")
1436
1183
def RemoveClient(self, object_path):
1437
1184
"D-Bus method"
1438
for c in tcp_server.clients:
1185
for c in clients:
1439
1186
if c.dbus_object_path == object_path:
1440
tcp_server.clients.remove(c)
1441
c.remove_from_connection()
1187
clients.remove(c)
1442
1188
# Don't signal anything except ClientRemoved
1443
c.disable(signal=False)
1189
c.use_dbus = False
1190
c.disable()
1444
1191
# Emit D-Bus signal
1445
1192
self.ClientRemoved(object_path, c.name)
1446
1193
return
1448
1195
1449
1196
del _interface
1450
1197
1451
mandos_dbus_service = MandosDBusService()
1198
mandos_server = MandosServer()
1452
1199
1453
for client in tcp_server.clients:
1200
for client in clients:
1454
1201
if use_dbus:
1455
1202
# Emit D-Bus signal
1456
mandos_dbus_service.ClientAdded(client.dbus_object_path,
1457
client.GetAllProperties())
1203
mandos_server.ClientAdded(client.dbus_object_path,
1204
client.GetAllProperties())
1458
1205
client.enable()
1459
1206
1460
1207
tcp_server.enable()
1474
1221
1475
1222
try:
1476
1223
# From the Avahi example code
1224
server.connect_to_signal("StateChanged", server_state_changed)
1477
1225
try:
1478
service.activate()
1226
server_state_changed(server.GetState())
1479
1227
except dbus.exceptions.DBusException, error:
1480
1228
logger.critical(u"DBusException: %s", error)
1481
1229
sys.exit(1)
1494
1242
except KeyboardInterrupt:
1495
1243
if debug:
1496
1244
print >> sys.stderr
1497
logger.debug(u"Server received KeyboardInterrupt")
1498
logger.debug(u"Server exiting")
1245
logger.debug("Server received KeyboardInterrupt")
1246
logger.debug("Server exiting")
1499
1247
1500
1248
if __name__ == '__main__':
1501
1249
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0