To get this branch, use:
bzr branch
http://bzr.recompile.se/loggerhead/mandos/trunk
« back to all changes in this revision
Viewing changes to mandos
- browse files at revision 275
- compare with another revision
- download diff
- download tarball
- view history from revision 275
- Committer: Teddy Hogeborn
- Date: 2009-01-18 00:16:57 UTC
- Revision ID: teddy@fukt.bsnet.se-20090118001657-6mo3ae73ldy5tegf
* debian/mandos-client.postinst: Converted to Bourne shell. Also
minor message change.
* debian/mandos-client.postrm: Minor message change.
* debian/mandos.postinst: Converted to Bourne shell. Also minor
message change.
* debian/mandos.prerm: Minor message change.
minor message change.
* debian/mandos-client.postrm: Minor message change.
* debian/mandos.postinst: Converted to Bourne shell. Also minor
message change.
* debian/mandos.prerm: Minor message change.
- files modified:
- INSTALL
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 = "1.0.5"
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: %(levelname)s: %(message)s'))
89
77
logger.addHandler(syslogger)
90
78
91
79
console = logging.StreamHandler()
92
console.setFormatter(logging.Formatter(u'%(name)s [%(process)d]:'
93
u' %(levelname)s:'
94
u' %(message)s'))
80
console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
81
' %(message)s'))
95
82
logger.addHandler(console)
96
83
97
84
class AvahiError(Exception):
110
97
111
98
class AvahiService(object):
112
99
"""An Avahi (Zeroconf) service.
113
114
100
Attributes:
115
101
interface: integer; avahi.IF_UNSPEC or an interface index.
116
102
Used to optionally bind to the specified interface.
117
name: string; Example: u'Mandos'
118
type: string; Example: u'_mandos._tcp'.
103
name: string; Example: 'Mandos'
104
type: string; Example: '_mandos._tcp'.
119
105
See <http://www.dns-sd.org/ServiceTypes.html>
120
106
port: integer; what port to announce
121
107
TXT: list of strings; TXT record for the service
124
110
max_renames: integer; maximum number of renames
125
111
rename_count: integer; counter so we only rename after collisions
126
112
a sensible number of times
127
group: D-Bus Entry Group
128
server: D-Bus Server
129
bus: dbus.SystemBus()
130
113
"""
131
114
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
132
115
servicetype = None, port = None, TXT = None,
133
domain = u"", host = u"", max_renames = 32768,
134
protocol = avahi.PROTO_UNSPEC, bus = None):
116
domain = "", host = "", max_renames = 32768):
135
117
self.interface = interface
136
118
self.name = name
137
119
self.type = servicetype
141
123
self.host = host
142
124
self.rename_count = 0
143
125
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
126
def rename(self):
149
127
"""Derived from the Avahi example code"""
150
128
if self.rename_count >= self.max_renames:
152
130
u" after %i retries, exiting.",
153
131
self.rename_count)
154
132
raise AvahiServiceError(u"Too many renames")
155
self.name = self.server.GetAlternativeServiceName(self.name)
133
self.name = server.GetAlternativeServiceName(self.name)
156
134
logger.info(u"Changing Zeroconf service name to %r ...",
157
unicode(self.name))
135
str(self.name))
158
136
syslogger.setFormatter(logging.Formatter
159
(u'Mandos (%s) [%%(process)d]:'
160
u' %%(levelname)s: %%(message)s'
161
% self.name))
137
('Mandos (%s): %%(levelname)s:'
138
' %%(message)s' % self.name))
162
139
self.remove()
163
140
self.add()
164
141
self.rename_count += 1
165
142
def remove(self):
166
143
"""Derived from the Avahi example code"""
167
if self.group is not None:
168
self.group.Reset()
144
if group is not None:
145
group.Reset()
169
146
def add(self):
170
147
"""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)
148
global group
149
if group is None:
150
group = dbus.Interface(bus.get_object
151
(avahi.DBUS_NAME,
152
server.EntryGroupNew()),
153
avahi.DBUS_INTERFACE_ENTRY_GROUP)
154
group.connect_to_signal('StateChanged',
155
entry_group_state_changed)
178
156
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):
157
service.name, service.type)
158
group.AddService(
159
self.interface, # interface
160
avahi.PROTO_INET6, # protocol
161
dbus.UInt32(0), # flags
162
self.name, self.type,
163
self.domain, self.host,
164
dbus.UInt16(self.port),
165
avahi.string_array_to_txt_array(self.TXT))
166
group.Commit()
167
168
# From the Avahi example code:
169
group = None # our entry group
170
# End of Avahi example code
171
172
173
def _datetime_to_dbus(dt, variant_level=0):
174
"""Convert a UTC datetime.datetime() to a D-Bus type."""
175
return dbus.String(dt.isoformat(), variant_level=variant_level)
176
177
178
class Client(dbus.service.Object):
228
179
"""A representation of a client host served by this server.
229
230
180
Attributes:
231
name: string; from the config file, used in log messages and
232
D-Bus identifiers
181
name: string; from the config file, used in log messages
233
182
fingerprint: string (40 or 32 hexadecimal digits); used to
234
183
uniquely identify the client
235
184
secret: bytestring; sent verbatim (over TLS) to client
252
201
client lives. %() expansions are done at
253
202
runtime with vars(self) as dict, so that for
254
203
instance %(name)s can be used in the command.
255
current_checker_command: string; current running checker_command
204
use_dbus: bool(); Whether to provide D-Bus interface and signals
205
dbus_object_path: dbus.ObjectPath ; only set if self.use_dbus
256
206
"""
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
207
def timeout_milliseconds(self):
266
208
"Return the 'timeout' attribute in milliseconds"
267
return self._datetime_to_milliseconds(self.timeout)
209
return ((self.timeout.days * 24 * 60 * 60 * 1000)
210
+ (self.timeout.seconds * 1000)
211
+ (self.timeout.microseconds // 1000))
268
212
269
213
def interval_milliseconds(self):
270
214
"Return the 'interval' attribute in milliseconds"
271
return self._datetime_to_milliseconds(self.interval)
215
return ((self.interval.days * 24 * 60 * 60 * 1000)
216
+ (self.interval.seconds * 1000)
217
+ (self.interval.microseconds // 1000))
272
218
273
def __init__(self, name = None, disable_hook=None, config=None):
219
def __init__(self, name = None, disable_hook=None, config=None,
220
use_dbus=True):
274
221
"""Note: the 'checker' key in 'config' sets the
275
222
'checker_command' attribute and *not* the 'checker'
276
223
attribute."""
278
225
if config is None:
279
226
config = {}
280
227
logger.debug(u"Creating client %r", self.name)
228
self.use_dbus = use_dbus
229
if self.use_dbus:
230
self.dbus_object_path = (dbus.ObjectPath
231
("/Mandos/clients/"
232
+ self.name.replace(".", "_")))
233
dbus.service.Object.__init__(self, bus,
234
self.dbus_object_path)
281
235
# Uppercase and remove spaces from fingerprint for later
282
236
# comparison purposes with return value from the fingerprint()
283
237
# function
284
self.fingerprint = (config[u"fingerprint"].upper()
238
self.fingerprint = (config["fingerprint"].upper()
285
239
.replace(u" ", u""))
286
240
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:
241
if "secret" in config:
242
self.secret = config["secret"].decode(u"base64")
243
elif "secfile" in config:
290
244
with closing(open(os.path.expanduser
291
245
(os.path.expandvars
292
(config[u"secfile"])))) as secfile:
246
(config["secfile"])))) as secfile:
293
247
self.secret = secfile.read()
294
248
else:
295
249
raise TypeError(u"No secret or secfile for client %s"
296
250
% self.name)
297
self.host = config.get(u"host", u"")
251
self.host = config.get("host", "")
298
252
self.created = datetime.datetime.utcnow()
299
253
self.enabled = False
300
254
self.last_enabled = None
301
255
self.last_checked_ok = None
302
self.timeout = string_to_delta(config[u"timeout"])
303
self.interval = string_to_delta(config[u"interval"])
256
self.timeout = string_to_delta(config["timeout"])
257
self.interval = string_to_delta(config["interval"])
304
258
self.disable_hook = disable_hook
305
259
self.checker = None
306
260
self.checker_initiator_tag = None
307
261
self.disable_initiator_tag = None
308
262
self.checker_callback_tag = None
309
self.checker_command = config[u"checker"]
310
self.current_checker_command = None
311
self.last_connect = None
263
self.checker_command = config["checker"]
312
264
313
265
def enable(self):
314
266
"""Start this client's checker and timeout hooks"""
315
if getattr(self, u"enabled", False):
316
# Already enabled
317
return
318
267
self.last_enabled = datetime.datetime.utcnow()
319
268
# Schedule a new checker to be started an 'interval' from now,
320
269
# and every interval from then on.
328
277
(self.timeout_milliseconds(),
329
278
self.disable))
330
279
self.enabled = True
280
if self.use_dbus:
281
# Emit D-Bus signals
282
self.PropertyChanged(dbus.String(u"enabled"),
283
dbus.Boolean(True, variant_level=1))
284
self.PropertyChanged(dbus.String(u"last_enabled"),
285
(_datetime_to_dbus(self.last_enabled,
286
variant_level=1)))
331
287
332
288
def disable(self):
333
289
"""Disable this client."""
334
290
if not getattr(self, "enabled", False):
335
291
return False
336
292
logger.info(u"Disabling client %s", self.name)
337
if getattr(self, u"disable_initiator_tag", False):
293
if getattr(self, "disable_initiator_tag", False):
338
294
gobject.source_remove(self.disable_initiator_tag)
339
295
self.disable_initiator_tag = None
340
if getattr(self, u"checker_initiator_tag", False):
296
if getattr(self, "checker_initiator_tag", False):
341
297
gobject.source_remove(self.checker_initiator_tag)
342
298
self.checker_initiator_tag = None
343
299
self.stop_checker()
344
300
if self.disable_hook:
345
301
self.disable_hook(self)
346
302
self.enabled = False
303
if self.use_dbus:
304
# Emit D-Bus signal
305
self.PropertyChanged(dbus.String(u"enabled"),
306
dbus.Boolean(False, variant_level=1))
347
307
# Do not run this again if called by a gobject.timeout_add
348
308
return False
349
309
355
315
"""The checker has completed, so take appropriate actions."""
356
316
self.checker_callback_tag = None
357
317
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:
318
if self.use_dbus:
319
# Emit D-Bus signal
320
self.PropertyChanged(dbus.String(u"checker_running"),
321
dbus.Boolean(False, variant_level=1))
322
if (os.WIFEXITED(condition)
323
and (os.WEXITSTATUS(condition) == 0)):
324
logger.info(u"Checker for %(name)s succeeded",
325
vars(self))
326
if self.use_dbus:
327
# Emit D-Bus signal
328
self.CheckerCompleted(dbus.Boolean(True),
329
dbus.UInt16(condition),
330
dbus.String(command))
331
self.bump_timeout()
332
elif not os.WIFEXITED(condition):
368
333
logger.warning(u"Checker for %(name)s crashed?",
369
334
vars(self))
335
if self.use_dbus:
336
# Emit D-Bus signal
337
self.CheckerCompleted(dbus.Boolean(False),
338
dbus.UInt16(condition),
339
dbus.String(command))
340
else:
341
logger.info(u"Checker for %(name)s failed",
342
vars(self))
343
if self.use_dbus:
344
# Emit D-Bus signal
345
self.CheckerCompleted(dbus.Boolean(False),
346
dbus.UInt16(condition),
347
dbus.String(command))
370
348
371
def checked_ok(self):
349
def bump_timeout(self):
372
350
"""Bump up the timeout for this client.
373
374
351
This should only be called when the client has been seen,
375
352
alive and well.
376
353
"""
379
356
self.disable_initiator_tag = (gobject.timeout_add
380
357
(self.timeout_milliseconds(),
381
358
self.disable))
359
if self.use_dbus:
360
# Emit D-Bus signal
361
self.PropertyChanged(
362
dbus.String(u"last_checked_ok"),
363
(_datetime_to_dbus(self.last_checked_ok,
364
variant_level=1)))
382
365
383
366
def start_checker(self):
384
367
"""Start a new checker subprocess if one is not running.
385
386
368
If a checker already exists, leave it running and do
387
369
nothing."""
388
370
# The reason for not killing a running checker is that if we
393
375
# checkers alone, the checker would have to take more time
394
376
# than 'timeout' for the client to be declared invalid, which
395
377
# 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
378
if self.checker is None:
407
379
try:
408
380
# In case checker_command has exactly one % operator
409
381
command = self.checker_command % self.host
410
382
except TypeError:
411
383
# Escape attributes for the shell
412
escaped_attrs = dict((key,
413
re.escape(unicode(str(val),
414
errors=
415
u'replace')))
384
escaped_attrs = dict((key, re.escape(str(val)))
416
385
for key, val in
417
386
vars(self).iteritems())
418
387
try:
421
390
logger.error(u'Could not format string "%s":'
422
391
u' %s', self.checker_command, error)
423
392
return True # Try again later
424
self.current_checker_command = command
425
393
try:
426
394
logger.info(u"Starting checker %r for %s",
427
395
command, self.name)
431
399
# always replaced by /dev/null.)
432
400
self.checker = subprocess.Popen(command,
433
401
close_fds=True,
434
shell=True, cwd=u"/")
402
shell=True, cwd="/")
403
if self.use_dbus:
404
# Emit D-Bus signal
405
self.CheckerStarted(command)
406
self.PropertyChanged(
407
dbus.String("checker_running"),
408
dbus.Boolean(True, variant_level=1))
435
409
self.checker_callback_tag = (gobject.child_watch_add
436
410
(self.checker.pid,
437
411
self.checker_callback,
438
412
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
413
except OSError, error:
446
414
logger.error(u"Failed to start subprocess: %s",
447
415
error)
453
421
if self.checker_callback_tag:
454
422
gobject.source_remove(self.checker_callback_tag)
455
423
self.checker_callback_tag = None
456
if getattr(self, u"checker", None) is None:
424
if getattr(self, "checker", None) is None:
457
425
return
458
426
logger.debug(u"Stopping checker for %(name)s", vars(self))
459
427
try:
465
433
if error.errno != errno.ESRCH: # No such process
466
434
raise
467
435
self.checker = None
436
if self.use_dbus:
437
self.PropertyChanged(dbus.String(u"checker_running"),
438
dbus.Boolean(False, variant_level=1))
468
439
469
440
def still_valid(self):
470
441
"""Has the timeout not yet passed for this client?"""
471
if not getattr(self, u"enabled", False):
442
if not getattr(self, "enabled", False):
472
443
return False
473
444
now = datetime.datetime.utcnow()
474
445
if self.last_checked_ok is None:
475
446
return now < (self.created + self.timeout)
476
447
else:
477
448
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
449
594
450
## D-Bus methods & signals
595
_interface = u"se.bsnet.fukt.Mandos.Client"
451
_interface = u"org.mandos_system.Mandos.Client"
596
452
597
# CheckedOK - method
598
@dbus.service.method(_interface)
599
def CheckedOK(self):
600
return self.checked_ok()
453
# BumpTimeout - method
454
BumpTimeout = dbus.service.method(_interface)(bump_timeout)
455
BumpTimeout.__name__ = "BumpTimeout"
601
456
602
457
# CheckerCompleted - signal
603
@dbus.service.signal(_interface, signature=u"nxs")
604
def CheckerCompleted(self, exitcode, waitstatus, command):
458
@dbus.service.signal(_interface, signature="bqs")
459
def CheckerCompleted(self, success, condition, command):
605
460
"D-Bus signal"
606
461
pass
607
462
608
463
# CheckerStarted - signal
609
@dbus.service.signal(_interface, signature=u"s")
464
@dbus.service.signal(_interface, signature="s")
610
465
def CheckerStarted(self, command):
611
466
"D-Bus signal"
612
467
pass
613
468
614
469
# GetAllProperties - method
615
@dbus.service.method(_interface, out_signature=u"a{sv}")
470
@dbus.service.method(_interface, out_signature="a{sv}")
616
471
def GetAllProperties(self):
617
472
"D-Bus method"
618
473
return dbus.Dictionary({
619
dbus.String(u"name"):
474
dbus.String("name"):
620
475
dbus.String(self.name, variant_level=1),
621
dbus.String(u"fingerprint"):
476
dbus.String("fingerprint"):
622
477
dbus.String(self.fingerprint, variant_level=1),
623
dbus.String(u"host"):
478
dbus.String("host"):
624
479
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)
480
dbus.String("created"):
481
_datetime_to_dbus(self.created, variant_level=1),
482
dbus.String("last_enabled"):
483
(_datetime_to_dbus(self.last_enabled,
484
variant_level=1)
631
485
if self.last_enabled is not None
632
486
else dbus.Boolean(False, variant_level=1)),
633
dbus.String(u"enabled"):
487
dbus.String("enabled"):
634
488
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)
489
dbus.String("last_checked_ok"):
490
(_datetime_to_dbus(self.last_checked_ok,
491
variant_level=1)
638
492
if self.last_checked_ok is not None
639
493
else dbus.Boolean (False, variant_level=1)),
640
dbus.String(u"timeout"):
494
dbus.String("timeout"):
641
495
dbus.UInt64(self.timeout_milliseconds(),
642
496
variant_level=1),
643
dbus.String(u"interval"):
497
dbus.String("interval"):
644
498
dbus.UInt64(self.interval_milliseconds(),
645
499
variant_level=1),
646
dbus.String(u"checker"):
500
dbus.String("checker"):
647
501
dbus.String(self.checker_command,
648
502
variant_level=1),
649
dbus.String(u"checker_running"):
503
dbus.String("checker_running"):
650
504
dbus.Boolean(self.checker is not None,
651
505
variant_level=1),
652
dbus.String(u"object_path"):
653
dbus.ObjectPath(self.dbus_object_path,
654
variant_level=1)
655
}, signature=u"sv")
506
}, signature="sv")
656
507
657
508
# IsStillValid - method
658
@dbus.service.method(_interface, out_signature=u"b")
659
def IsStillValid(self):
660
return self.still_valid()
509
IsStillValid = (dbus.service.method(_interface, out_signature="b")
510
(still_valid))
511
IsStillValid.__name__ = "IsStillValid"
661
512
662
513
# PropertyChanged - signal
663
@dbus.service.signal(_interface, signature=u"sv")
514
@dbus.service.signal(_interface, signature="sv")
664
515
def PropertyChanged(self, property, value):
665
516
"D-Bus signal"
666
517
pass
667
518
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
519
# SetChecker - method
681
@dbus.service.method(_interface, in_signature=u"s")
520
@dbus.service.method(_interface, in_signature="s")
682
521
def SetChecker(self, checker):
683
522
"D-Bus setter method"
684
523
self.checker_command = checker
688
527
variant_level=1))
689
528
690
529
# SetHost - method
691
@dbus.service.method(_interface, in_signature=u"s")
530
@dbus.service.method(_interface, in_signature="s")
692
531
def SetHost(self, host):
693
532
"D-Bus setter method"
694
533
self.host = host
697
536
dbus.String(self.host, variant_level=1))
698
537
699
538
# SetInterval - method
700
@dbus.service.method(_interface, in_signature=u"t")
539
@dbus.service.method(_interface, in_signature="t")
701
540
def SetInterval(self, milliseconds):
702
541
self.interval = datetime.timedelta(0, 0, 0, milliseconds)
703
542
# Emit D-Bus signal
706
545
variant_level=1)))
707
546
708
547
# SetSecret - method
709
@dbus.service.method(_interface, in_signature=u"ay",
548
@dbus.service.method(_interface, in_signature="ay",
710
549
byte_arrays=True)
711
550
def SetSecret(self, secret):
712
551
"D-Bus setter method"
713
552
self.secret = str(secret)
714
553
715
554
# SetTimeout - method
716
@dbus.service.method(_interface, in_signature=u"t")
555
@dbus.service.method(_interface, in_signature="t")
717
556
def SetTimeout(self, milliseconds):
718
557
self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
719
558
# Emit D-Bus signal
722
561
variant_level=1)))
723
562
724
563
# Enable - method
725
@dbus.service.method(_interface)
726
def Enable(self):
727
"D-Bus method"
728
self.enable()
564
Enable = dbus.service.method(_interface)(enable)
565
Enable.__name__ = "Enable"
729
566
730
567
# StartChecker - method
731
568
@dbus.service.method(_interface)
740
577
self.disable()
741
578
742
579
# StopChecker - method
743
@dbus.service.method(_interface)
744
def StopChecker(self):
745
self.stop_checker()
580
StopChecker = dbus.service.method(_interface)(stop_checker)
581
StopChecker.__name__ = "StopChecker"
746
582
747
583
del _interface
748
584
749
585
750
class ClientHandler(socketserver.BaseRequestHandler, object):
751
"""A class to handle client connections.
752
753
Instantiated once for each connection to handle it.
586
def peer_certificate(session):
587
"Return the peer's OpenPGP certificate as a bytestring"
588
# If not an OpenPGP certificate...
589
if (gnutls.library.functions
590
.gnutls_certificate_type_get(session._c_object)
591
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
592
# ...do the normal thing
593
return session.peer_certificate
594
list_size = ctypes.c_uint()
595
cert_list = (gnutls.library.functions
596
.gnutls_certificate_get_peers
597
(session._c_object, ctypes.byref(list_size)))
598
if list_size.value == 0:
599
return None
600
cert = cert_list[0]
601
return ctypes.string_at(cert.data, cert.size)
602
603
604
def fingerprint(openpgp):
605
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
606
# New GnuTLS "datum" with the OpenPGP public key
607
datum = (gnutls.library.types
608
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
609
ctypes.POINTER
610
(ctypes.c_ubyte)),
611
ctypes.c_uint(len(openpgp))))
612
# New empty GnuTLS certificate
613
crt = gnutls.library.types.gnutls_openpgp_crt_t()
614
(gnutls.library.functions
615
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
616
# Import the OpenPGP public key into the certificate
617
(gnutls.library.functions
618
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
619
gnutls.library.constants
620
.GNUTLS_OPENPGP_FMT_RAW))
621
# Verify the self signature in the key
622
crtverify = ctypes.c_uint()
623
(gnutls.library.functions
624
.gnutls_openpgp_crt_verify_self(crt, 0, ctypes.byref(crtverify)))
625
if crtverify.value != 0:
626
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
627
raise gnutls.errors.CertificateSecurityError("Verify failed")
628
# New buffer for the fingerprint
629
buf = ctypes.create_string_buffer(20)
630
buf_len = ctypes.c_size_t()
631
# Get the fingerprint from the certificate into the buffer
632
(gnutls.library.functions
633
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
634
ctypes.byref(buf_len)))
635
# Deinit the certificate
636
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
637
# Convert the buffer to a Python bytestring
638
fpr = ctypes.string_at(buf, buf_len.value)
639
# Convert the bytestring to hexadecimal notation
640
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
641
return hex_fpr
642
643
644
class TCP_handler(SocketServer.BaseRequestHandler, object):
645
"""A TCP request handler class.
646
Instantiated by IPv6_TCPServer for each request to handle it.
754
647
Note: This will run in its own forked process."""
755
648
756
649
def handle(self):
757
650
logger.info(u"TCP connection from: %s",
758
651
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):
918
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
919
652
session = (gnutls.connection
653
.ClientSession(self.request,
654
gnutls.connection
655
.X509Credentials()))
656
657
line = self.request.makefile().readline()
658
logger.debug(u"Protocol version: %r", line)
659
try:
660
if int(line.strip().split()[0]) > 1:
661
raise RuntimeError
662
except (ValueError, IndexError, RuntimeError), error:
663
logger.error(u"Unknown protocol version: %s", error)
664
return
665
666
# Note: gnutls.connection.X509Credentials is really a generic
667
# GnuTLS certificate credentials object so long as no X.509
668
# keys are added to it. Therefore, we can use it here despite
669
# using OpenPGP certificates.
670
671
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
672
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
673
# "+DHE-DSS"))
674
# Use a fallback default, since this MUST be set.
675
priority = self.server.settings.get("priority", "NORMAL")
676
(gnutls.library.functions
677
.gnutls_priority_set_direct(session._c_object,
678
priority, None))
679
680
try:
681
session.handshake()
682
except gnutls.errors.GNUTLSError, error:
683
logger.warning(u"Handshake failed: %s", error)
684
# Do not run session.bye() here: the session is not
685
# established. Just abandon the request.
686
return
687
try:
688
fpr = fingerprint(peer_certificate(session))
689
except (TypeError, gnutls.errors.GNUTLSError), error:
690
logger.warning(u"Bad certificate: %s", error)
691
session.bye()
692
return
693
logger.debug(u"Fingerprint: %s", fpr)
694
for c in self.server.clients:
695
if c.fingerprint == fpr:
696
client = c
697
break
698
else:
699
logger.warning(u"Client not found for fingerprint: %s",
700
fpr)
701
session.bye()
702
return
703
# Have to check if client.still_valid(), since it is possible
704
# that the client timed out while establishing the GnuTLS
705
# session.
706
if not client.still_valid():
707
logger.warning(u"Client %(name)s is invalid",
708
vars(client))
709
session.bye()
710
return
711
## This won't work here, since we're in a fork.
712
# client.bump_timeout()
713
sent_size = 0
714
while sent_size < len(client.secret):
715
sent = session.send(client.secret[sent_size:])
716
logger.debug(u"Sent: %d, remaining: %d",
717
sent, len(client.secret)
718
- (sent_size + sent))
719
sent_size += sent
720
session.bye()
721
722
723
class IPv6_TCPServer(SocketServer.ForkingMixIn,
724
SocketServer.TCPServer, object):
725
"""IPv6 TCP server. Accepts 'None' as address and/or port.
920
726
Attributes:
727
settings: Server settings
728
clients: Set() of Client objects
921
729
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
730
"""
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)
731
address_family = socket.AF_INET6
732
def __init__(self, *args, **kwargs):
733
if "settings" in kwargs:
734
self.settings = kwargs["settings"]
735
del kwargs["settings"]
736
if "clients" in kwargs:
737
self.clients = kwargs["clients"]
738
del kwargs["clients"]
739
self.enabled = False
740
super(IPv6_TCPServer, self).__init__(*args, **kwargs)
932
741
def server_bind(self):
933
742
"""This overrides the normal server_bind() function
934
743
to bind to an interface if one was specified, and also NOT to
935
744
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
745
if self.settings["interface"]:
746
# 25 is from /usr/include/asm-i486/socket.h
747
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
748
try:
749
self.socket.setsockopt(socket.SOL_SOCKET,
750
SO_BINDTODEVICE,
751
self.settings["interface"])
752
except socket.error, error:
753
if error[0] == errno.EPERM:
754
logger.error(u"No permission to"
755
u" bind to interface %s",
756
self.settings["interface"])
757
else:
758
raise error
958
759
# Only bind(2) the socket if we really need to.
959
760
if self.server_address[0] or self.server_address[1]:
960
761
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,
762
in6addr_any = "::"
763
self.server_address = (in6addr_any,
966
764
self.server_address[1])
967
765
elif not self.server_address[1]:
968
766
self.server_address = (self.server_address[0],
969
767
0)
970
# if self.interface:
768
# if self.settings["interface"]:
971
769
# self.server_address = (self.server_address[0],
972
770
# 0, # port
973
771
# 0, # flowinfo
974
772
# 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)
773
# (self.settings
774
# ["interface"]))
775
return super(IPv6_TCPServer, self).server_bind()
1005
776
def server_activate(self):
1006
777
if self.enabled:
1007
return socketserver.TCPServer.server_activate(self)
778
return super(IPv6_TCPServer, self).server_activate()
1008
779
def enable(self):
1009
780
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
781
1085
782
1086
783
def string_to_delta(interval):
1087
784
"""Parse a string and return a datetime.timedelta
1088
1089
>>> string_to_delta(u'7d')
785
786
>>> string_to_delta('7d')
1090
787
datetime.timedelta(7)
1091
>>> string_to_delta(u'60s')
788
>>> string_to_delta('60s')
1092
789
datetime.timedelta(0, 60)
1093
>>> string_to_delta(u'60m')
790
>>> string_to_delta('60m')
1094
791
datetime.timedelta(0, 3600)
1095
>>> string_to_delta(u'24h')
792
>>> string_to_delta('24h')
1096
793
datetime.timedelta(1)
1097
794
>>> string_to_delta(u'1w')
1098
795
datetime.timedelta(7)
1099
>>> string_to_delta(u'5m 30s')
796
>>> string_to_delta('5m 30s')
1100
797
datetime.timedelta(0, 330)
1101
798
"""
1102
799
timevalue = datetime.timedelta(0)
1122
819
return timevalue
1123
820
1124
821
822
def server_state_changed(state):
823
"""Derived from the Avahi example code"""
824
if state == avahi.SERVER_COLLISION:
825
logger.error(u"Zeroconf server name collision")
826
service.remove()
827
elif state == avahi.SERVER_RUNNING:
828
service.add()
829
830
831
def entry_group_state_changed(state, error):
832
"""Derived from the Avahi example code"""
833
logger.debug(u"Avahi state change: %i", state)
834
835
if state == avahi.ENTRY_GROUP_ESTABLISHED:
836
logger.debug(u"Zeroconf service established.")
837
elif state == avahi.ENTRY_GROUP_COLLISION:
838
logger.warning(u"Zeroconf service name collision.")
839
service.rename()
840
elif state == avahi.ENTRY_GROUP_FAILURE:
841
logger.critical(u"Avahi: Error in group state changed %s",
842
unicode(error))
843
raise AvahiGroupError(u"State changed: %s" % unicode(error))
844
1125
845
def if_nametoindex(interface):
1126
"""Call the C function if_nametoindex(), or equivalent
1127
1128
Note: This function cannot accept a unicode string."""
846
"""Call the C function if_nametoindex(), or equivalent"""
1129
847
global if_nametoindex
1130
848
try:
1131
849
if_nametoindex = (ctypes.cdll.LoadLibrary
1132
(ctypes.util.find_library(u"c"))
850
(ctypes.util.find_library("c"))
1133
851
.if_nametoindex)
1134
852
except (OSError, AttributeError):
1135
logger.warning(u"Doing if_nametoindex the hard way")
853
if "struct" not in sys.modules:
854
import struct
855
if "fcntl" not in sys.modules:
856
import fcntl
1136
857
def if_nametoindex(interface):
1137
858
"Get an interface index the hard way, i.e. using fcntl()"
1138
859
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1139
860
with closing(socket.socket()) as s:
1140
861
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]
862
struct.pack("16s16x", interface))
863
interface_index = struct.unpack("I", ifreq[16:20])[0]
1145
864
return interface_index
1146
865
return if_nametoindex(interface)
1147
866
1148
867
1149
868
def daemon(nochdir = False, noclose = False):
1150
869
"""See daemon(3). Standard BSD Unix function.
1151
1152
870
This should really exist as os.daemon, but it doesn't (yet)."""
1153
871
if os.fork():
1154
872
sys.exit()
1155
873
os.setsid()
1156
874
if not nochdir:
1157
os.chdir(u"/")
875
os.chdir("/")
1158
876
if os.fork():
1159
877
sys.exit()
1160
878
if not noclose:
1162
880
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1163
881
if not stat.S_ISCHR(os.fstat(null).st_mode):
1164
882
raise OSError(errno.ENODEV,
1165
u"/dev/null not a character device")
883
"/dev/null not a character device")
1166
884
os.dup2(null, sys.stdin.fileno())
1167
885
os.dup2(null, sys.stdout.fileno())
1168
886
os.dup2(null, sys.stderr.fileno())
1171
889
1172
890
1173
891
def main():
1174
1175
######################################################################
1176
# Parsing of options, both command line and config file
1177
1178
892
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")
893
parser.add_option("-i", "--interface", type="string",
894
metavar="IF", help="Bind to interface IF")
895
parser.add_option("-a", "--address", type="string",
896
help="Address to listen for requests on")
897
parser.add_option("-p", "--port", type="int",
898
help="Port number to receive requests on")
899
parser.add_option("--check", action="store_true",
900
help="Run self-test")
901
parser.add_option("--debug", action="store_true",
902
help="Debug mode; run in foreground and log to"
903
" terminal")
904
parser.add_option("--priority", type="string", help="GnuTLS"
905
" priority string (see GnuTLS documentation)")
906
parser.add_option("--servicename", type="string", metavar="NAME",
907
help="Zeroconf service name")
908
parser.add_option("--configdir", type="string",
909
default="/etc/mandos", metavar="DIR",
910
help="Directory to search for configuration"
911
" files")
912
parser.add_option("--no-dbus", action="store_false",
913
dest="use_dbus",
914
help="Do not provide D-Bus system bus"
915
" interface")
1203
916
options = parser.parse_args()[0]
1204
917
1205
918
if options.check:
1208
921
sys.exit()
1209
922
1210
923
# 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",
924
server_defaults = { "interface": "",
925
"address": "",
926
"port": "",
927
"debug": "False",
928
"priority":
929
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
930
"servicename": "Mandos",
931
"use_dbus": "True",
1220
932
}
1221
933
1222
934
# Parse config file for server-global settings
1223
server_config = configparser.SafeConfigParser(server_defaults)
935
server_config = ConfigParser.SafeConfigParser(server_defaults)
1224
936
del server_defaults
1225
server_config.read(os.path.join(options.configdir,
1226
u"mandos.conf"))
937
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1227
938
# Convert the SafeConfigParser object to a dict
1228
939
server_settings = server_config.defaults()
1229
# 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)
1233
if server_settings["port"]:
1234
server_settings["port"] = server_config.getint(u"DEFAULT",
1235
u"port")
940
# Use getboolean on the boolean config options
941
server_settings["debug"] = (server_config.getboolean
942
("DEFAULT", "debug"))
943
server_settings["use_dbus"] = (server_config.getboolean
944
("DEFAULT", "use_dbus"))
1236
945
del server_config
1237
946
1238
947
# Override the settings from the config file with command line
1239
948
# 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"):
949
for option in ("interface", "address", "port", "debug",
950
"priority", "servicename", "configdir",
951
"use_dbus"):
1243
952
value = getattr(options, option)
1244
953
if value is not None:
1245
954
server_settings[option] = value
1246
955
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
956
# Now we have our good server settings in "server_settings"
1252
957
1253
##################################################################
1254
1255
958
# For convenience
1256
debug = server_settings[u"debug"]
1257
use_dbus = server_settings[u"use_dbus"]
1258
use_ipv6 = server_settings[u"use_ipv6"]
959
debug = server_settings["debug"]
960
use_dbus = server_settings["use_dbus"]
1259
961
1260
962
if not debug:
1261
963
syslogger.setLevel(logging.WARNING)
1262
964
console.setLevel(logging.WARNING)
1263
965
1264
if server_settings[u"servicename"] != u"Mandos":
966
if server_settings["servicename"] != "Mandos":
1265
967
syslogger.setFormatter(logging.Formatter
1266
(u'Mandos (%s) [%%(process)d]:'
1267
u' %%(levelname)s: %%(message)s'
1268
% server_settings[u"servicename"]))
968
('Mandos (%s): %%(levelname)s:'
969
' %%(message)s'
970
% server_settings["servicename"]))
1269
971
1270
972
# 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"",
973
client_defaults = { "timeout": "1h",
974
"interval": "5m",
975
"checker": "fping -q -- %%(host)s",
976
"host": "",
1275
977
}
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"
1292
try:
1293
pidfile = open(pidfilename, u"w")
1294
except IOError:
1295
logger.error(u"Could not open file %r", pidfilename)
1296
1297
try:
1298
uid = pwd.getpwnam(u"_mandos").pw_uid
1299
gid = pwd.getpwnam(u"_mandos").pw_gid
978
client_config = ConfigParser.SafeConfigParser(client_defaults)
979
client_config.read(os.path.join(server_settings["configdir"],
980
"clients.conf"))
981
982
clients = Set()
983
tcp_server = IPv6_TCPServer((server_settings["address"],
984
server_settings["port"]),
985
TCP_handler,
986
settings=server_settings,
987
clients=clients)
988
pidfilename = "/var/run/mandos.pid"
989
try:
990
pidfile = open(pidfilename, "w")
991
except IOError, error:
992
logger.error("Could not open file %r", pidfilename)
993
994
try:
995
uid = pwd.getpwnam("_mandos").pw_uid
996
gid = pwd.getpwnam("_mandos").pw_gid
1300
997
except KeyError:
1301
998
try:
1302
uid = pwd.getpwnam(u"mandos").pw_uid
1303
gid = pwd.getpwnam(u"mandos").pw_gid
999
uid = pwd.getpwnam("mandos").pw_uid
1000
gid = pwd.getpwnam("mandos").pw_gid
1304
1001
except KeyError:
1305
1002
try:
1306
uid = pwd.getpwnam(u"nobody").pw_uid
1307
gid = pwd.getpwnam(u"nobody").pw_gid
1003
uid = pwd.getpwnam("nobody").pw_uid
1004
gid = pwd.getpwnam("nogroup").pw_gid
1308
1005
except KeyError:
1309
1006
uid = 65534
1310
1007
gid = 65534
1311
1008
try:
1009
os.setuid(uid)
1312
1010
os.setgid(gid)
1313
os.setuid(uid)
1314
1011
except OSError, error:
1315
1012
if error[0] != errno.EPERM:
1316
1013
raise error
1317
1014
1318
# Enable all possible GnuTLS debugging
1319
if debug:
1320
# "Use a log level over 10 to enable all debugging options."
1321
# - GnuTLS manual
1322
gnutls.library.functions.gnutls_global_set_log_level(11)
1323
1324
@gnutls.library.types.gnutls_log_func
1325
def debug_gnutls(level, string):
1326
logger.debug(u"GnuTLS: %s", string[:-1])
1327
1328
(gnutls.library.functions
1329
.gnutls_global_set_log_function(debug_gnutls))
1015
global service
1016
service = AvahiService(name = server_settings["servicename"],
1017
servicetype = "_mandos._tcp", )
1018
if server_settings["interface"]:
1019
service.interface = (if_nametoindex
1020
(server_settings["interface"]))
1330
1021
1331
1022
global main_loop
1023
global bus
1024
global server
1332
1025
# From the Avahi example code
1333
1026
DBusGMainLoop(set_as_default=True )
1334
1027
main_loop = gobject.MainLoop()
1335
1028
bus = dbus.SystemBus()
1029
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
1030
avahi.DBUS_PATH_SERVER),
1031
avahi.DBUS_INTERFACE_SERVER)
1336
1032
# End of Avahi example code
1337
1033
if use_dbus:
1338
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"])))
1034
bus_name = dbus.service.BusName(u"org.mandos-system.Mandos",
1035
bus)
1346
1036
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:
1037
clients.update(Set(Client(name = section,
1038
config
1039
= dict(client_config.items(section)),
1040
use_dbus = use_dbus)
1041
for section in client_config.sections()))
1042
if not clients:
1355
1043
logger.warning(u"No clients defined")
1356
1044
1357
1045
if debug:
1367
1055
daemon()
1368
1056
1369
1057
try:
1370
with closing(pidfile):
1371
pid = os.getpid()
1372
pidfile.write(str(pid) + "\n")
1058
pid = os.getpid()
1059
pidfile.write(str(pid) + "\n")
1060
pidfile.close()
1373
1061
del pidfile
1374
1062
except IOError:
1375
1063
logger.error(u"Could not write to file %r with PID %d",
1381
1069
1382
1070
def cleanup():
1383
1071
"Cleanup function; run on exit"
1384
service.cleanup()
1072
global group
1073
# From the Avahi example code
1074
if not group is None:
1075
group.Free()
1076
group = None
1077
# End of Avahi example code
1385
1078
1386
while tcp_server.clients:
1387
client = tcp_server.clients.pop()
1079
while clients:
1080
client = clients.pop()
1388
1081
client.disable_hook = None
1389
1082
client.disable()
1390
1083
1396
1089
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1397
1090
1398
1091
if use_dbus:
1399
class MandosDBusService(dbus.service.Object):
1092
class MandosServer(dbus.service.Object):
1400
1093
"""A D-Bus proxy object"""
1401
1094
def __init__(self):
1402
dbus.service.Object.__init__(self, bus, u"/")
1403
_interface = u"se.bsnet.fukt.Mandos"
1404
1405
@dbus.service.signal(_interface, signature=u"oa{sv}")
1095
dbus.service.Object.__init__(self, bus,
1096
"/Mandos")
1097
_interface = u"org.mandos_system.Mandos"
1098
1099
@dbus.service.signal(_interface, signature="oa{sv}")
1406
1100
def ClientAdded(self, objpath, properties):
1407
1101
"D-Bus signal"
1408
1102
pass
1409
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")
1416
def ClientRemoved(self, objpath, name):
1417
"D-Bus signal"
1418
pass
1419
1420
@dbus.service.method(_interface, out_signature=u"ao")
1103
1104
@dbus.service.signal(_interface, signature="o")
1105
def ClientRemoved(self, objpath):
1106
"D-Bus signal"
1107
pass
1108
1109
@dbus.service.method(_interface, out_signature="ao")
1421
1110
def GetAllClients(self):
1422
"D-Bus method"
1423
return dbus.Array(c.dbus_object_path
1424
for c in tcp_server.clients)
1425
1426
@dbus.service.method(_interface,
1427
out_signature=u"a{oa{sv}}")
1111
return dbus.Array(c.dbus_object_path for c in clients)
1112
1113
@dbus.service.method(_interface, out_signature="a{oa{sv}}")
1428
1114
def GetAllClientsWithProperties(self):
1429
"D-Bus method"
1430
1115
return dbus.Dictionary(
1431
1116
((c.dbus_object_path, c.GetAllProperties())
1432
for c in tcp_server.clients),
1433
signature=u"oa{sv}")
1434
1435
@dbus.service.method(_interface, in_signature=u"o")
1117
for c in clients),
1118
signature="oa{sv}")
1119
1120
@dbus.service.method(_interface, in_signature="o")
1436
1121
def RemoveClient(self, object_path):
1437
"D-Bus method"
1438
for c in tcp_server.clients:
1122
for c in clients:
1439
1123
if c.dbus_object_path == object_path:
1440
tcp_server.clients.remove(c)
1441
c.remove_from_connection()
1124
clients.remove(c)
1442
1125
# Don't signal anything except ClientRemoved
1443
c.disable(signal=False)
1126
c.use_dbus = False
1127
c.disable()
1444
1128
# Emit D-Bus signal
1445
self.ClientRemoved(object_path, c.name)
1129
self.ClientRemoved(object_path)
1446
1130
return
1447
1131
raise KeyError
1448
1132
@dbus.service.method(_interface)
1133
def Quit(self):
1134
main_loop.quit()
1135
1449
1136
del _interface
1450
1451
mandos_dbus_service = MandosDBusService()
1452
1453
for client in tcp_server.clients:
1137
1138
mandos_server = MandosServer()
1139
1140
for client in clients:
1454
1141
if use_dbus:
1455
1142
# Emit D-Bus signal
1456
mandos_dbus_service.ClientAdded(client.dbus_object_path,
1457
client.GetAllProperties())
1143
mandos_server.ClientAdded(client.dbus_object_path,
1144
client.GetAllProperties())
1458
1145
client.enable()
1459
1146
1460
1147
tcp_server.enable()
1462
1149
1463
1150
# Find out what port we got
1464
1151
service.port = tcp_server.socket.getsockname()[1]
1465
if use_ipv6:
1466
logger.info(u"Now listening on address %r, port %d,"
1467
" flowinfo %d, scope_id %d"
1468
% tcp_server.socket.getsockname())
1469
else: # IPv4
1470
logger.info(u"Now listening on address %r, port %d"
1471
% tcp_server.socket.getsockname())
1152
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
1153
u" scope_id %d" % tcp_server.socket.getsockname())
1472
1154
1473
1155
#service.interface = tcp_server.socket.getsockname()[3]
1474
1156
1475
1157
try:
1476
1158
# From the Avahi example code
1159
server.connect_to_signal("StateChanged", server_state_changed)
1477
1160
try:
1478
service.activate()
1161
server_state_changed(server.GetState())
1479
1162
except dbus.exceptions.DBusException, error:
1480
1163
logger.critical(u"DBusException: %s", error)
1481
1164
sys.exit(1)
1493
1176
sys.exit(1)
1494
1177
except KeyboardInterrupt:
1495
1178
if debug:
1496
print >> sys.stderr
1497
logger.debug(u"Server received KeyboardInterrupt")
1498
logger.debug(u"Server exiting")
1179
print
1499
1180
1500
1181
if __name__ == '__main__':
1501
1182
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0