To get this branch, use:
bzr branch
http://bzr.recompile.se/loggerhead/mandos/release
« back to all changes in this revision
Viewing changes to mandos
- browse files at revision 237.2.37
- compare with another revision
- download diff
- download tarball
- view history from revision 237.2.37
- Committer: Teddy Hogeborn
- Date: 2009-01-17 09:46:54 UTC
- mto: (24.1.125 mandos) (237.4.2 mandos-pipe-ipc) (299.1.1 release) (300.1.1 release) (301.1.1 release)
- mto: This revision was merged to the branch mainline in revision 249.
- Revision ID: teddy@fukt.bsnet.se-20090117094654-ydvanis7caqoxxn7
* mandos-keygen (password): Remove bashism "${PIPESTATUS}".
- 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
# From /usr/include/asm/socket.h
78
SO_BINDTODEVICE = 25
79
80
81
version = "1.0.8"
82
83
logger = logging.Logger(u'mandos')
69
version = "1.0.5"
70
71
logger = logging.Logger('mandos')
84
72
syslogger = (logging.handlers.SysLogHandler
85
73
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
86
74
address = "/dev/log"))
87
75
syslogger.setFormatter(logging.Formatter
88
(u'Mandos [%(process)d]: %(levelname)s:'
89
u' %(message)s'))
76
('Mandos: %(levelname)s: %(message)s'))
90
77
logger.addHandler(syslogger)
91
78
92
79
console = logging.StreamHandler()
93
console.setFormatter(logging.Formatter(u'%(name)s [%(process)d]:'
94
u' %(levelname)s:'
95
u' %(message)s'))
80
console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
81
' %(message)s'))
96
82
logger.addHandler(console)
97
83
98
84
class AvahiError(Exception):
111
97
112
98
class AvahiService(object):
113
99
"""An Avahi (Zeroconf) service.
114
115
100
Attributes:
116
101
interface: integer; avahi.IF_UNSPEC or an interface index.
117
102
Used to optionally bind to the specified interface.
118
name: string; Example: u'Mandos'
119
type: string; Example: u'_mandos._tcp'.
103
name: string; Example: 'Mandos'
104
type: string; Example: '_mandos._tcp'.
120
105
See <http://www.dns-sd.org/ServiceTypes.html>
121
106
port: integer; what port to announce
122
107
TXT: list of strings; TXT record for the service
125
110
max_renames: integer; maximum number of renames
126
111
rename_count: integer; counter so we only rename after collisions
127
112
a sensible number of times
128
group: D-Bus Entry Group
129
server: D-Bus Server
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"""
325
277
(self.timeout_milliseconds(),
326
278
self.disable))
327
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)))
328
287
329
288
def disable(self):
330
289
"""Disable this client."""
331
290
if not getattr(self, "enabled", False):
332
291
return False
333
292
logger.info(u"Disabling client %s", self.name)
334
if getattr(self, u"disable_initiator_tag", False):
293
if getattr(self, "disable_initiator_tag", False):
335
294
gobject.source_remove(self.disable_initiator_tag)
336
295
self.disable_initiator_tag = None
337
if getattr(self, u"checker_initiator_tag", False):
296
if getattr(self, "checker_initiator_tag", False):
338
297
gobject.source_remove(self.checker_initiator_tag)
339
298
self.checker_initiator_tag = None
340
299
self.stop_checker()
341
300
if self.disable_hook:
342
301
self.disable_hook(self)
343
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))
344
307
# Do not run this again if called by a gobject.timeout_add
345
308
return False
346
309
352
315
"""The checker has completed, so take appropriate actions."""
353
316
self.checker_callback_tag = None
354
317
self.checker = None
355
if os.WIFEXITED(condition):
356
exitstatus = os.WEXITSTATUS(condition)
357
if exitstatus == 0:
358
logger.info(u"Checker for %(name)s succeeded",
359
vars(self))
360
self.checked_ok()
361
else:
362
logger.info(u"Checker for %(name)s failed",
363
vars(self))
364
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):
365
333
logger.warning(u"Checker for %(name)s crashed?",
366
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))
367
348
368
def checked_ok(self):
349
def bump_timeout(self):
369
350
"""Bump up the timeout for this client.
370
371
351
This should only be called when the client has been seen,
372
352
alive and well.
373
353
"""
376
356
self.disable_initiator_tag = (gobject.timeout_add
377
357
(self.timeout_milliseconds(),
378
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)))
379
365
380
366
def start_checker(self):
381
367
"""Start a new checker subprocess if one is not running.
382
383
368
If a checker already exists, leave it running and do
384
369
nothing."""
385
370
# The reason for not killing a running checker is that if we
390
375
# checkers alone, the checker would have to take more time
391
376
# than 'timeout' for the client to be declared invalid, which
392
377
# is as it should be.
393
394
# If a checker exists, make sure it is not a zombie
395
if self.checker is not None:
396
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
397
if pid:
398
logger.warning(u"Checker was a zombie")
399
gobject.source_remove(self.checker_callback_tag)
400
self.checker_callback(pid, status,
401
self.current_checker_command)
402
# Start a new checker if needed
403
378
if self.checker is None:
404
379
try:
405
380
# In case checker_command has exactly one % operator
406
381
command = self.checker_command % self.host
407
382
except TypeError:
408
383
# Escape attributes for the shell
409
escaped_attrs = dict((key,
410
re.escape(unicode(str(val),
411
errors=
412
u'replace')))
384
escaped_attrs = dict((key, re.escape(str(val)))
413
385
for key, val in
414
386
vars(self).iteritems())
415
387
try:
418
390
logger.error(u'Could not format string "%s":'
419
391
u' %s', self.checker_command, error)
420
392
return True # Try again later
421
self.current_checker_command = command
422
393
try:
423
394
logger.info(u"Starting checker %r for %s",
424
395
command, self.name)
428
399
# always replaced by /dev/null.)
429
400
self.checker = subprocess.Popen(command,
430
401
close_fds=True,
431
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))
432
409
self.checker_callback_tag = (gobject.child_watch_add
433
410
(self.checker.pid,
434
411
self.checker_callback,
435
412
data=command))
436
# The checker may have completed before the gobject
437
# watch was added. Check for this.
438
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
439
if pid:
440
gobject.source_remove(self.checker_callback_tag)
441
self.checker_callback(pid, status, command)
442
413
except OSError, error:
443
414
logger.error(u"Failed to start subprocess: %s",
444
415
error)
450
421
if self.checker_callback_tag:
451
422
gobject.source_remove(self.checker_callback_tag)
452
423
self.checker_callback_tag = None
453
if getattr(self, u"checker", None) is None:
424
if getattr(self, "checker", None) is None:
454
425
return
455
426
logger.debug(u"Stopping checker for %(name)s", vars(self))
456
427
try:
462
433
if error.errno != errno.ESRCH: # No such process
463
434
raise
464
435
self.checker = None
436
if self.use_dbus:
437
self.PropertyChanged(dbus.String(u"checker_running"),
438
dbus.Boolean(False, variant_level=1))
465
439
466
440
def still_valid(self):
467
441
"""Has the timeout not yet passed for this client?"""
468
if not getattr(self, u"enabled", False):
442
if not getattr(self, "enabled", False):
469
443
return False
470
444
now = datetime.datetime.utcnow()
471
445
if self.last_checked_ok is None:
472
446
return now < (self.created + self.timeout)
473
447
else:
474
448
return now < (self.last_checked_ok + self.timeout)
475
476
477
class ClientDBus(Client, dbus.service.Object):
478
"""A Client class using D-Bus
479
480
Attributes:
481
dbus_object_path: dbus.ObjectPath ; only set if self.use_dbus
482
"""
483
# dbus.service.Object doesn't use super(), so we can't either.
484
485
def __init__(self, bus = None, *args, **kwargs):
486
self.bus = bus
487
Client.__init__(self, *args, **kwargs)
488
# Only now, when this client is initialized, can it show up on
489
# the D-Bus
490
self.dbus_object_path = (dbus.ObjectPath
491
(u"/clients/"
492
+ self.name.replace(u".", u"_")))
493
dbus.service.Object.__init__(self, self.bus,
494
self.dbus_object_path)
495
496
@staticmethod
497
def _datetime_to_dbus(dt, variant_level=0):
498
"""Convert a UTC datetime.datetime() to a D-Bus type."""
499
return dbus.String(dt.isoformat(),
500
variant_level=variant_level)
501
502
def enable(self):
503
oldstate = getattr(self, u"enabled", False)
504
r = Client.enable(self)
505
if oldstate != self.enabled:
506
# Emit D-Bus signals
507
self.PropertyChanged(dbus.String(u"enabled"),
508
dbus.Boolean(True, variant_level=1))
509
self.PropertyChanged(
510
dbus.String(u"last_enabled"),
511
self._datetime_to_dbus(self.last_enabled,
512
variant_level=1))
513
return r
514
515
def disable(self, signal = True):
516
oldstate = getattr(self, u"enabled", False)
517
r = Client.disable(self)
518
if signal and oldstate != self.enabled:
519
# Emit D-Bus signal
520
self.PropertyChanged(dbus.String(u"enabled"),
521
dbus.Boolean(False, variant_level=1))
522
return r
523
524
def __del__(self, *args, **kwargs):
525
try:
526
self.remove_from_connection()
527
except LookupError:
528
pass
529
if hasattr(dbus.service.Object, u"__del__"):
530
dbus.service.Object.__del__(self, *args, **kwargs)
531
Client.__del__(self, *args, **kwargs)
532
533
def checker_callback(self, pid, condition, command,
534
*args, **kwargs):
535
self.checker_callback_tag = None
536
self.checker = None
537
# Emit D-Bus signal
538
self.PropertyChanged(dbus.String(u"checker_running"),
539
dbus.Boolean(False, variant_level=1))
540
if os.WIFEXITED(condition):
541
exitstatus = os.WEXITSTATUS(condition)
542
# Emit D-Bus signal
543
self.CheckerCompleted(dbus.Int16(exitstatus),
544
dbus.Int64(condition),
545
dbus.String(command))
546
else:
547
# Emit D-Bus signal
548
self.CheckerCompleted(dbus.Int16(-1),
549
dbus.Int64(condition),
550
dbus.String(command))
551
552
return Client.checker_callback(self, pid, condition, command,
553
*args, **kwargs)
554
555
def checked_ok(self, *args, **kwargs):
556
r = Client.checked_ok(self, *args, **kwargs)
557
# Emit D-Bus signal
558
self.PropertyChanged(
559
dbus.String(u"last_checked_ok"),
560
(self._datetime_to_dbus(self.last_checked_ok,
561
variant_level=1)))
562
return r
563
564
def start_checker(self, *args, **kwargs):
565
old_checker = self.checker
566
if self.checker is not None:
567
old_checker_pid = self.checker.pid
568
else:
569
old_checker_pid = None
570
r = Client.start_checker(self, *args, **kwargs)
571
# Only if new checker process was started
572
if (self.checker is not None
573
and old_checker_pid != self.checker.pid):
574
# Emit D-Bus signal
575
self.CheckerStarted(self.current_checker_command)
576
self.PropertyChanged(
577
dbus.String(u"checker_running"),
578
dbus.Boolean(True, variant_level=1))
579
return r
580
581
def stop_checker(self, *args, **kwargs):
582
old_checker = getattr(self, u"checker", None)
583
r = Client.stop_checker(self, *args, **kwargs)
584
if (old_checker is not None
585
and getattr(self, u"checker", None) is None):
586
self.PropertyChanged(dbus.String(u"checker_running"),
587
dbus.Boolean(False, variant_level=1))
588
return r
589
449
590
450
## D-Bus methods & signals
591
_interface = u"se.bsnet.fukt.Mandos.Client"
451
_interface = u"org.mandos_system.Mandos.Client"
592
452
593
# CheckedOK - method
594
@dbus.service.method(_interface)
595
def CheckedOK(self):
596
return self.checked_ok()
453
# BumpTimeout - method
454
BumpTimeout = dbus.service.method(_interface)(bump_timeout)
455
BumpTimeout.__name__ = "BumpTimeout"
597
456
598
457
# CheckerCompleted - signal
599
@dbus.service.signal(_interface, signature=u"nxs")
600
def CheckerCompleted(self, exitcode, waitstatus, command):
458
@dbus.service.signal(_interface, signature="bqs")
459
def CheckerCompleted(self, success, condition, command):
601
460
"D-Bus signal"
602
461
pass
603
462
604
463
# CheckerStarted - signal
605
@dbus.service.signal(_interface, signature=u"s")
464
@dbus.service.signal(_interface, signature="s")
606
465
def CheckerStarted(self, command):
607
466
"D-Bus signal"
608
467
pass
609
468
610
469
# GetAllProperties - method
611
@dbus.service.method(_interface, out_signature=u"a{sv}")
470
@dbus.service.method(_interface, out_signature="a{sv}")
612
471
def GetAllProperties(self):
613
472
"D-Bus method"
614
473
return dbus.Dictionary({
615
dbus.String(u"name"):
474
dbus.String("name"):
616
475
dbus.String(self.name, variant_level=1),
617
dbus.String(u"fingerprint"):
476
dbus.String("fingerprint"):
618
477
dbus.String(self.fingerprint, variant_level=1),
619
dbus.String(u"host"):
478
dbus.String("host"):
620
479
dbus.String(self.host, variant_level=1),
621
dbus.String(u"created"):
622
self._datetime_to_dbus(self.created,
623
variant_level=1),
624
dbus.String(u"last_enabled"):
625
(self._datetime_to_dbus(self.last_enabled,
626
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)
627
485
if self.last_enabled is not None
628
486
else dbus.Boolean(False, variant_level=1)),
629
dbus.String(u"enabled"):
487
dbus.String("enabled"):
630
488
dbus.Boolean(self.enabled, variant_level=1),
631
dbus.String(u"last_checked_ok"):
632
(self._datetime_to_dbus(self.last_checked_ok,
633
variant_level=1)
489
dbus.String("last_checked_ok"):
490
(_datetime_to_dbus(self.last_checked_ok,
491
variant_level=1)
634
492
if self.last_checked_ok is not None
635
493
else dbus.Boolean (False, variant_level=1)),
636
dbus.String(u"timeout"):
494
dbus.String("timeout"):
637
495
dbus.UInt64(self.timeout_milliseconds(),
638
496
variant_level=1),
639
dbus.String(u"interval"):
497
dbus.String("interval"):
640
498
dbus.UInt64(self.interval_milliseconds(),
641
499
variant_level=1),
642
dbus.String(u"checker"):
500
dbus.String("checker"):
643
501
dbus.String(self.checker_command,
644
502
variant_level=1),
645
dbus.String(u"checker_running"):
503
dbus.String("checker_running"):
646
504
dbus.Boolean(self.checker is not None,
647
505
variant_level=1),
648
dbus.String(u"object_path"):
649
dbus.ObjectPath(self.dbus_object_path,
650
variant_level=1)
651
}, signature=u"sv")
506
}, signature="sv")
652
507
653
508
# IsStillValid - method
654
@dbus.service.method(_interface, out_signature=u"b")
655
def IsStillValid(self):
656
return self.still_valid()
509
IsStillValid = (dbus.service.method(_interface, out_signature="b")
510
(still_valid))
511
IsStillValid.__name__ = "IsStillValid"
657
512
658
513
# PropertyChanged - signal
659
@dbus.service.signal(_interface, signature=u"sv")
514
@dbus.service.signal(_interface, signature="sv")
660
515
def PropertyChanged(self, property, value):
661
516
"D-Bus signal"
662
517
pass
663
518
664
# ReceivedSecret - signal
665
@dbus.service.signal(_interface)
666
def ReceivedSecret(self):
667
"D-Bus signal"
668
pass
669
670
# Rejected - signal
671
@dbus.service.signal(_interface)
672
def Rejected(self):
673
"D-Bus signal"
674
pass
675
676
519
# SetChecker - method
677
@dbus.service.method(_interface, in_signature=u"s")
520
@dbus.service.method(_interface, in_signature="s")
678
521
def SetChecker(self, checker):
679
522
"D-Bus setter method"
680
523
self.checker_command = checker
684
527
variant_level=1))
685
528
686
529
# SetHost - method
687
@dbus.service.method(_interface, in_signature=u"s")
530
@dbus.service.method(_interface, in_signature="s")
688
531
def SetHost(self, host):
689
532
"D-Bus setter method"
690
533
self.host = host
693
536
dbus.String(self.host, variant_level=1))
694
537
695
538
# SetInterval - method
696
@dbus.service.method(_interface, in_signature=u"t")
539
@dbus.service.method(_interface, in_signature="t")
697
540
def SetInterval(self, milliseconds):
698
541
self.interval = datetime.timedelta(0, 0, 0, milliseconds)
699
542
# Emit D-Bus signal
702
545
variant_level=1)))
703
546
704
547
# SetSecret - method
705
@dbus.service.method(_interface, in_signature=u"ay",
548
@dbus.service.method(_interface, in_signature="ay",
706
549
byte_arrays=True)
707
550
def SetSecret(self, secret):
708
551
"D-Bus setter method"
709
552
self.secret = str(secret)
710
553
711
554
# SetTimeout - method
712
@dbus.service.method(_interface, in_signature=u"t")
555
@dbus.service.method(_interface, in_signature="t")
713
556
def SetTimeout(self, milliseconds):
714
557
self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
715
558
# Emit D-Bus signal
718
561
variant_level=1)))
719
562
720
563
# Enable - method
721
@dbus.service.method(_interface)
722
def Enable(self):
723
"D-Bus method"
724
self.enable()
564
Enable = dbus.service.method(_interface)(enable)
565
Enable.__name__ = "Enable"
725
566
726
567
# StartChecker - method
727
568
@dbus.service.method(_interface)
736
577
self.disable()
737
578
738
579
# StopChecker - method
739
@dbus.service.method(_interface)
740
def StopChecker(self):
741
self.stop_checker()
580
StopChecker = dbus.service.method(_interface)(stop_checker)
581
StopChecker.__name__ = "StopChecker"
742
582
743
583
del _interface
744
584
745
585
746
class ClientHandler(socketserver.BaseRequestHandler, object):
747
"""A class to handle client connections.
748
749
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.
750
647
Note: This will run in its own forked process."""
751
648
752
649
def handle(self):
753
650
logger.info(u"TCP connection from: %s",
754
651
unicode(self.client_address))
755
logger.debug(u"IPC Pipe FD: %d", self.server.pipe[1])
756
# Open IPC pipe to parent process
757
with closing(os.fdopen(self.server.pipe[1], u"w", 1)) as ipc:
758
session = (gnutls.connection
759
.ClientSession(self.request,
760
gnutls.connection
761
.X509Credentials()))
762
763
line = self.request.makefile().readline()
764
logger.debug(u"Protocol version: %r", line)
765
try:
766
if int(line.strip().split()[0]) > 1:
767
raise RuntimeError
768
except (ValueError, IndexError, RuntimeError), error:
769
logger.error(u"Unknown protocol version: %s", error)
770
return
771
772
# Note: gnutls.connection.X509Credentials is really a
773
# generic GnuTLS certificate credentials object so long as
774
# no X.509 keys are added to it. Therefore, we can use it
775
# here despite using OpenPGP certificates.
776
777
#priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
778
# u"+AES-256-CBC", u"+SHA1",
779
# u"+COMP-NULL", u"+CTYPE-OPENPGP",
780
# u"+DHE-DSS"))
781
# Use a fallback default, since this MUST be set.
782
priority = self.server.gnutls_priority
783
if priority is None:
784
priority = u"NORMAL"
785
(gnutls.library.functions
786
.gnutls_priority_set_direct(session._c_object,
787
priority, None))
788
789
try:
790
session.handshake()
791
except gnutls.errors.GNUTLSError, error:
792
logger.warning(u"Handshake failed: %s", error)
793
# Do not run session.bye() here: the session is not
794
# established. Just abandon the request.
795
return
796
logger.debug(u"Handshake succeeded")
797
try:
798
fpr = self.fingerprint(self.peer_certificate(session))
799
except (TypeError, gnutls.errors.GNUTLSError), error:
800
logger.warning(u"Bad certificate: %s", error)
801
session.bye()
802
return
803
logger.debug(u"Fingerprint: %s", fpr)
804
805
for c in self.server.clients:
806
if c.fingerprint == fpr:
807
client = c
808
break
809
else:
810
ipc.write(u"NOTFOUND %s\n" % fpr)
811
session.bye()
812
return
813
# Have to check if client.still_valid(), since it is
814
# possible that the client timed out while establishing
815
# the GnuTLS session.
816
if not client.still_valid():
817
ipc.write(u"INVALID %s\n" % client.name)
818
session.bye()
819
return
820
ipc.write(u"SENDING %s\n" % client.name)
821
sent_size = 0
822
while sent_size < len(client.secret):
823
sent = session.send(client.secret[sent_size:])
824
logger.debug(u"Sent: %d, remaining: %d",
825
sent, len(client.secret)
826
- (sent_size + sent))
827
sent_size += sent
828
session.bye()
829
830
@staticmethod
831
def peer_certificate(session):
832
"Return the peer's OpenPGP certificate as a bytestring"
833
# If not an OpenPGP certificate...
834
if (gnutls.library.functions
835
.gnutls_certificate_type_get(session._c_object)
836
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
837
# ...do the normal thing
838
return session.peer_certificate
839
list_size = ctypes.c_uint(1)
840
cert_list = (gnutls.library.functions
841
.gnutls_certificate_get_peers
842
(session._c_object, ctypes.byref(list_size)))
843
if not bool(cert_list) and list_size.value != 0:
844
raise gnutls.errors.GNUTLSError(u"error getting peer"
845
u" certificate")
846
if list_size.value == 0:
847
return None
848
cert = cert_list[0]
849
return ctypes.string_at(cert.data, cert.size)
850
851
@staticmethod
852
def fingerprint(openpgp):
853
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
854
# New GnuTLS "datum" with the OpenPGP public key
855
datum = (gnutls.library.types
856
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
857
ctypes.POINTER
858
(ctypes.c_ubyte)),
859
ctypes.c_uint(len(openpgp))))
860
# New empty GnuTLS certificate
861
crt = gnutls.library.types.gnutls_openpgp_crt_t()
862
(gnutls.library.functions
863
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
864
# Import the OpenPGP public key into the certificate
865
(gnutls.library.functions
866
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
867
gnutls.library.constants
868
.GNUTLS_OPENPGP_FMT_RAW))
869
# Verify the self signature in the key
870
crtverify = ctypes.c_uint()
871
(gnutls.library.functions
872
.gnutls_openpgp_crt_verify_self(crt, 0,
873
ctypes.byref(crtverify)))
874
if crtverify.value != 0:
875
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
876
raise (gnutls.errors.CertificateSecurityError
877
(u"Verify failed"))
878
# New buffer for the fingerprint
879
buf = ctypes.create_string_buffer(20)
880
buf_len = ctypes.c_size_t()
881
# Get the fingerprint from the certificate into the buffer
882
(gnutls.library.functions
883
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
884
ctypes.byref(buf_len)))
885
# Deinit the certificate
886
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
887
# Convert the buffer to a Python bytestring
888
fpr = ctypes.string_at(buf, buf_len.value)
889
# Convert the bytestring to hexadecimal notation
890
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
891
return hex_fpr
892
893
894
class ForkingMixInWithPipe(socketserver.ForkingMixIn, object):
895
"""Like socketserver.ForkingMixIn, but also pass a pipe.
896
897
Assumes a gobject.MainLoop event loop.
898
"""
899
def process_request(self, request, client_address):
900
"""Overrides and wraps the original process_request().
901
902
This function creates a new pipe in self.pipe
903
"""
904
self.pipe = os.pipe()
905
super(ForkingMixInWithPipe,
906
self).process_request(request, client_address)
907
os.close(self.pipe[1]) # close write end
908
# Call "handle_ipc" for both data and EOF events
909
gobject.io_add_watch(self.pipe[0],
910
gobject.IO_IN | gobject.IO_HUP,
911
self.handle_ipc)
912
def handle_ipc(source, condition):
913
"""Dummy function; override as necessary"""
914
os.close(source)
915
return False
916
917
918
class IPv6_TCPServer(ForkingMixInWithPipe,
919
socketserver.TCPServer, object):
920
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
921
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.
922
726
Attributes:
727
settings: Server settings
728
clients: Set() of Client objects
923
729
enabled: Boolean; whether this server is activated yet
924
interface: None or a network interface name (string)
925
use_ipv6: Boolean; to use IPv6 or not
926
----
927
clients: set of Client objects
928
gnutls_priority GnuTLS priority string
929
use_dbus: Boolean; to emit D-Bus signals or not
930
730
"""
931
def __init__(self, server_address, RequestHandlerClass,
932
interface=None, use_ipv6=True, clients=None,
933
gnutls_priority=None, use_dbus=True):
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"]
934
739
self.enabled = False
935
self.interface = interface
936
if use_ipv6:
937
self.address_family = socket.AF_INET6
938
self.clients = clients
939
self.use_dbus = use_dbus
940
self.gnutls_priority = gnutls_priority
941
socketserver.TCPServer.__init__(self, server_address,
942
RequestHandlerClass)
740
super(IPv6_TCPServer, self).__init__(*args, **kwargs)
943
741
def server_bind(self):
944
742
"""This overrides the normal server_bind() function
945
743
to bind to an interface if one was specified, and also NOT to
946
744
bind to an address or port if they were not specified."""
947
if self.interface is not None:
745
if self.settings["interface"]:
746
# 25 is from /usr/include/asm-i486/socket.h
747
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
948
748
try:
949
749
self.socket.setsockopt(socket.SOL_SOCKET,
950
750
SO_BINDTODEVICE,
951
str(self.interface + u'\0'))
751
self.settings["interface"])
952
752
except socket.error, error:
953
753
if error[0] == errno.EPERM:
954
754
logger.error(u"No permission to"
955
755
u" bind to interface %s",
956
self.interface)
756
self.settings["interface"])
957
757
else:
958
raise
758
raise error
959
759
# Only bind(2) the socket if we really need to.
960
760
if self.server_address[0] or self.server_address[1]:
961
761
if not self.server_address[0]:
962
if self.address_family == socket.AF_INET6:
963
any_address = u"::" # in6addr_any
964
else:
965
any_address = socket.INADDR_ANY
966
self.server_address = (any_address,
762
in6addr_any = "::"
763
self.server_address = (in6addr_any,
967
764
self.server_address[1])
968
765
elif not self.server_address[1]:
969
766
self.server_address = (self.server_address[0],
970
767
0)
971
# if self.interface:
768
# if self.settings["interface"]:
972
769
# self.server_address = (self.server_address[0],
973
770
# 0, # port
974
771
# 0, # flowinfo
975
772
# if_nametoindex
976
# (self.interface))
977
return socketserver.TCPServer.server_bind(self)
773
# (self.settings
774
# ["interface"]))
775
return super(IPv6_TCPServer, self).server_bind()
978
776
def server_activate(self):
979
777
if self.enabled:
980
return socketserver.TCPServer.server_activate(self)
778
return super(IPv6_TCPServer, self).server_activate()
981
779
def enable(self):
982
780
self.enabled = True
983
def handle_ipc(self, source, condition, file_objects={}):
984
condition_names = {
985
gobject.IO_IN: u"IN", # There is data to read.
986
gobject.IO_OUT: u"OUT", # Data can be written (without
987
# blocking).
988
gobject.IO_PRI: u"PRI", # There is urgent data to read.
989
gobject.IO_ERR: u"ERR", # Error condition.
990
gobject.IO_HUP: u"HUP" # Hung up (the connection has been
991
# broken, usually for pipes and
992
# sockets).
993
}
994
conditions_string = ' | '.join(name
995
for cond, name in
996
condition_names.iteritems()
997
if cond & condition)
998
logger.debug(u"Handling IPC: FD = %d, condition = %s", source,
999
conditions_string)
1000
1001
# Turn the pipe file descriptor into a Python file object
1002
if source not in file_objects:
1003
file_objects[source] = os.fdopen(source, u"r", 1)
1004
1005
# Read a line from the file object
1006
cmdline = file_objects[source].readline()
1007
if not cmdline: # Empty line means end of file
1008
# close the IPC pipe
1009
file_objects[source].close()
1010
del file_objects[source]
1011
1012
# Stop calling this function
1013
return False
1014
1015
logger.debug(u"IPC command: %r", cmdline)
1016
1017
# Parse and act on command
1018
cmd, args = cmdline.rstrip(u"\r\n").split(None, 1)
1019
1020
if cmd == u"NOTFOUND":
1021
logger.warning(u"Client not found for fingerprint: %s",
1022
args)
1023
if self.use_dbus:
1024
# Emit D-Bus signal
1025
mandos_dbus_service.ClientNotFound(args)
1026
elif cmd == u"INVALID":
1027
for client in self.clients:
1028
if client.name == args:
1029
logger.warning(u"Client %s is invalid", args)
1030
if self.use_dbus:
1031
# Emit D-Bus signal
1032
client.Rejected()
1033
break
1034
else:
1035
logger.error(u"Unknown client %s is invalid", args)
1036
elif cmd == u"SENDING":
1037
for client in self.clients:
1038
if client.name == args:
1039
logger.info(u"Sending secret to %s", client.name)
1040
client.checked_ok()
1041
if self.use_dbus:
1042
# Emit D-Bus signal
1043
client.ReceivedSecret()
1044
break
1045
else:
1046
logger.error(u"Sending secret to unknown client %s",
1047
args)
1048
else:
1049
logger.error(u"Unknown IPC command: %r", cmdline)
1050
1051
# Keep calling this function
1052
return True
1053
781
1054
782
1055
783
def string_to_delta(interval):
1056
784
"""Parse a string and return a datetime.timedelta
1057
1058
>>> string_to_delta(u'7d')
785
786
>>> string_to_delta('7d')
1059
787
datetime.timedelta(7)
1060
>>> string_to_delta(u'60s')
788
>>> string_to_delta('60s')
1061
789
datetime.timedelta(0, 60)
1062
>>> string_to_delta(u'60m')
790
>>> string_to_delta('60m')
1063
791
datetime.timedelta(0, 3600)
1064
>>> string_to_delta(u'24h')
792
>>> string_to_delta('24h')
1065
793
datetime.timedelta(1)
1066
794
>>> string_to_delta(u'1w')
1067
795
datetime.timedelta(7)
1068
>>> string_to_delta(u'5m 30s')
796
>>> string_to_delta('5m 30s')
1069
797
datetime.timedelta(0, 330)
1070
798
"""
1071
799
timevalue = datetime.timedelta(0)
1091
819
return timevalue
1092
820
1093
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
1094
845
def if_nametoindex(interface):
1095
"""Call the C function if_nametoindex(), or equivalent
1096
1097
Note: This function cannot accept a unicode string."""
846
"""Call the C function if_nametoindex(), or equivalent"""
1098
847
global if_nametoindex
1099
848
try:
1100
849
if_nametoindex = (ctypes.cdll.LoadLibrary
1101
(ctypes.util.find_library(u"c"))
850
(ctypes.util.find_library("c"))
1102
851
.if_nametoindex)
1103
852
except (OSError, AttributeError):
1104
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
1105
857
def if_nametoindex(interface):
1106
858
"Get an interface index the hard way, i.e. using fcntl()"
1107
859
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1108
860
with closing(socket.socket()) as s:
1109
861
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1110
struct.pack(str(u"16s16x"),
1111
interface))
1112
interface_index = struct.unpack(str(u"I"),
1113
ifreq[16:20])[0]
862
struct.pack("16s16x", interface))
863
interface_index = struct.unpack("I", ifreq[16:20])[0]
1114
864
return interface_index
1115
865
return if_nametoindex(interface)
1116
866
1117
867
1118
868
def daemon(nochdir = False, noclose = False):
1119
869
"""See daemon(3). Standard BSD Unix function.
1120
1121
870
This should really exist as os.daemon, but it doesn't (yet)."""
1122
871
if os.fork():
1123
872
sys.exit()
1124
873
os.setsid()
1125
874
if not nochdir:
1126
os.chdir(u"/")
875
os.chdir("/")
1127
876
if os.fork():
1128
877
sys.exit()
1129
878
if not noclose:
1131
880
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1132
881
if not stat.S_ISCHR(os.fstat(null).st_mode):
1133
882
raise OSError(errno.ENODEV,
1134
u"/dev/null not a character device")
883
"/dev/null not a character device")
1135
884
os.dup2(null, sys.stdin.fileno())
1136
885
os.dup2(null, sys.stdout.fileno())
1137
886
os.dup2(null, sys.stderr.fileno())
1140
889
1141
890
1142
891
def main():
1143
1144
######################################################################
1145
# Parsing of options, both command line and config file
1146
1147
892
parser = optparse.OptionParser(version = "%%prog %s" % version)
1148
parser.add_option("-i", u"--interface", type=u"string",
1149
metavar="IF", help=u"Bind to interface IF")
1150
parser.add_option("-a", u"--address", type=u"string",
1151
help=u"Address to listen for requests on")
1152
parser.add_option("-p", u"--port", type=u"int",
1153
help=u"Port number to receive requests on")
1154
parser.add_option("--check", action=u"store_true",
1155
help=u"Run self-test")
1156
parser.add_option("--debug", action=u"store_true",
1157
help=u"Debug mode; run in foreground and log to"
1158
u" terminal")
1159
parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1160
u" priority string (see GnuTLS documentation)")
1161
parser.add_option("--servicename", type=u"string",
1162
metavar=u"NAME", help=u"Zeroconf service name")
1163
parser.add_option("--configdir", type=u"string",
1164
default=u"/etc/mandos", metavar=u"DIR",
1165
help=u"Directory to search for configuration"
1166
u" files")
1167
parser.add_option("--no-dbus", action=u"store_false",
1168
dest=u"use_dbus", help=u"Do not provide D-Bus"
1169
u" system bus interface")
1170
parser.add_option("--no-ipv6", action=u"store_false",
1171
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")
1172
916
options = parser.parse_args()[0]
1173
917
1174
918
if options.check:
1177
921
sys.exit()
1178
922
1179
923
# Default values for config file for server-global settings
1180
server_defaults = { u"interface": u"",
1181
u"address": u"",
1182
u"port": u"",
1183
u"debug": u"False",
1184
u"priority":
1185
u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1186
u"servicename": u"Mandos",
1187
u"use_dbus": u"True",
1188
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",
1189
932
}
1190
933
1191
934
# Parse config file for server-global settings
1192
server_config = configparser.SafeConfigParser(server_defaults)
935
server_config = ConfigParser.SafeConfigParser(server_defaults)
1193
936
del server_defaults
1194
server_config.read(os.path.join(options.configdir,
1195
u"mandos.conf"))
937
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1196
938
# Convert the SafeConfigParser object to a dict
1197
939
server_settings = server_config.defaults()
1198
# Use the appropriate methods on the non-string config options
1199
for option in (u"debug", u"use_dbus", u"use_ipv6"):
1200
server_settings[option] = server_config.getboolean(u"DEFAULT",
1201
option)
1202
if server_settings["port"]:
1203
server_settings["port"] = server_config.getint(u"DEFAULT",
1204
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"))
1205
945
del server_config
1206
946
1207
947
# Override the settings from the config file with command line
1208
948
# options, if set.
1209
for option in (u"interface", u"address", u"port", u"debug",
1210
u"priority", u"servicename", u"configdir",
1211
u"use_dbus", u"use_ipv6"):
949
for option in ("interface", "address", "port", "debug",
950
"priority", "servicename", "configdir",
951
"use_dbus"):
1212
952
value = getattr(options, option)
1213
953
if value is not None:
1214
954
server_settings[option] = value
1215
955
del options
1216
# Force all strings to be unicode
1217
for option in server_settings.keys():
1218
if type(server_settings[option]) is str:
1219
server_settings[option] = unicode(server_settings[option])
1220
956
# Now we have our good server settings in "server_settings"
1221
957
1222
##################################################################
1223
1224
958
# For convenience
1225
debug = server_settings[u"debug"]
1226
use_dbus = server_settings[u"use_dbus"]
1227
use_ipv6 = server_settings[u"use_ipv6"]
959
debug = server_settings["debug"]
960
use_dbus = server_settings["use_dbus"]
1228
961
1229
962
if not debug:
1230
963
syslogger.setLevel(logging.WARNING)
1231
964
console.setLevel(logging.WARNING)
1232
965
1233
if server_settings[u"servicename"] != u"Mandos":
966
if server_settings["servicename"] != "Mandos":
1234
967
syslogger.setFormatter(logging.Formatter
1235
(u'Mandos (%s) [%%(process)d]:'
1236
u' %%(levelname)s: %%(message)s'
1237
% server_settings[u"servicename"]))
968
('Mandos (%s): %%(levelname)s:'
969
' %%(message)s'
970
% server_settings["servicename"]))
1238
971
1239
972
# Parse config file with clients
1240
client_defaults = { u"timeout": u"1h",
1241
u"interval": u"5m",
1242
u"checker": u"fping -q -- %%(host)s",
1243
u"host": u"",
973
client_defaults = { "timeout": "1h",
974
"interval": "5m",
975
"checker": "fping -q -- %%(host)s",
976
"host": "",
1244
977
}
1245
client_config = configparser.SafeConfigParser(client_defaults)
1246
client_config.read(os.path.join(server_settings[u"configdir"],
1247
u"clients.conf"))
1248
1249
global mandos_dbus_service
1250
mandos_dbus_service = None
1251
1252
clients = set()
1253
tcp_server = IPv6_TCPServer((server_settings[u"address"],
1254
server_settings[u"port"]),
1255
ClientHandler,
1256
interface=
1257
server_settings[u"interface"],
1258
use_ipv6=use_ipv6,
1259
clients=clients,
1260
gnutls_priority=
1261
server_settings[u"priority"],
1262
use_dbus=use_dbus)
1263
pidfilename = u"/var/run/mandos.pid"
1264
try:
1265
pidfile = open(pidfilename, u"w")
1266
except IOError:
1267
logger.error(u"Could not open file %r", pidfilename)
1268
1269
try:
1270
uid = pwd.getpwnam(u"_mandos").pw_uid
1271
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
1272
997
except KeyError:
1273
998
try:
1274
uid = pwd.getpwnam(u"mandos").pw_uid
1275
gid = pwd.getpwnam(u"mandos").pw_gid
999
uid = pwd.getpwnam("mandos").pw_uid
1000
gid = pwd.getpwnam("mandos").pw_gid
1276
1001
except KeyError:
1277
1002
try:
1278
uid = pwd.getpwnam(u"nobody").pw_uid
1279
gid = pwd.getpwnam(u"nobody").pw_gid
1003
uid = pwd.getpwnam("nobody").pw_uid
1004
gid = pwd.getpwnam("nogroup").pw_gid
1280
1005
except KeyError:
1281
1006
uid = 65534
1282
1007
gid = 65534
1283
1008
try:
1009
os.setuid(uid)
1284
1010
os.setgid(gid)
1285
os.setuid(uid)
1286
1011
except OSError, error:
1287
1012
if error[0] != errno.EPERM:
1288
1013
raise error
1289
1014
1290
# Enable all possible GnuTLS debugging
1291
if debug:
1292
# "Use a log level over 10 to enable all debugging options."
1293
# - GnuTLS manual
1294
gnutls.library.functions.gnutls_global_set_log_level(11)
1295
1296
@gnutls.library.types.gnutls_log_func
1297
def debug_gnutls(level, string):
1298
logger.debug(u"GnuTLS: %s", string[:-1])
1299
1300
(gnutls.library.functions
1301
.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"]))
1302
1021
1303
1022
global main_loop
1023
global bus
1024
global server
1304
1025
# From the Avahi example code
1305
1026
DBusGMainLoop(set_as_default=True )
1306
1027
main_loop = gobject.MainLoop()
1307
1028
bus = dbus.SystemBus()
1029
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
1030
avahi.DBUS_PATH_SERVER),
1031
avahi.DBUS_INTERFACE_SERVER)
1308
1032
# End of Avahi example code
1309
1033
if use_dbus:
1310
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
1311
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1312
service = AvahiService(name = server_settings[u"servicename"],
1313
servicetype = u"_mandos._tcp",
1314
protocol = protocol, bus = bus)
1315
if server_settings["interface"]:
1316
service.interface = (if_nametoindex
1317
(str(server_settings[u"interface"])))
1034
bus_name = dbus.service.BusName(u"org.mandos-system.Mandos",
1035
bus)
1318
1036
1319
client_class = Client
1320
if use_dbus:
1321
client_class = functools.partial(ClientDBus, bus = bus)
1322
clients.update(set(
1323
client_class(name = section,
1324
config= dict(client_config.items(section)))
1325
for section in client_config.sections()))
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()))
1326
1042
if not clients:
1327
1043
logger.warning(u"No clients defined")
1328
1044
1339
1055
daemon()
1340
1056
1341
1057
try:
1342
with closing(pidfile):
1343
pid = os.getpid()
1344
pidfile.write(str(pid) + "\n")
1058
pid = os.getpid()
1059
pidfile.write(str(pid) + "\n")
1060
pidfile.close()
1345
1061
del pidfile
1346
1062
except IOError:
1347
1063
logger.error(u"Could not write to file %r with PID %d",
1353
1069
1354
1070
def cleanup():
1355
1071
"Cleanup function; run on exit"
1356
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
1357
1078
1358
1079
while clients:
1359
1080
client = clients.pop()
1368
1089
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1369
1090
1370
1091
if use_dbus:
1371
class MandosDBusService(dbus.service.Object):
1092
class MandosServer(dbus.service.Object):
1372
1093
"""A D-Bus proxy object"""
1373
1094
def __init__(self):
1374
dbus.service.Object.__init__(self, bus, u"/")
1375
_interface = u"se.bsnet.fukt.Mandos"
1376
1377
@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}")
1378
1100
def ClientAdded(self, objpath, properties):
1379
1101
"D-Bus signal"
1380
1102
pass
1381
1382
@dbus.service.signal(_interface, signature=u"s")
1383
def ClientNotFound(self, fingerprint):
1384
"D-Bus signal"
1385
pass
1386
1387
@dbus.service.signal(_interface, signature=u"os")
1388
def ClientRemoved(self, objpath, name):
1389
"D-Bus signal"
1390
pass
1391
1392
@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")
1393
1110
def GetAllClients(self):
1394
"D-Bus method"
1395
1111
return dbus.Array(c.dbus_object_path for c in clients)
1396
1397
@dbus.service.method(_interface,
1398
out_signature=u"a{oa{sv}}")
1112
1113
@dbus.service.method(_interface, out_signature="a{oa{sv}}")
1399
1114
def GetAllClientsWithProperties(self):
1400
"D-Bus method"
1401
1115
return dbus.Dictionary(
1402
1116
((c.dbus_object_path, c.GetAllProperties())
1403
1117
for c in clients),
1404
signature=u"oa{sv}")
1405
1406
@dbus.service.method(_interface, in_signature=u"o")
1118
signature="oa{sv}")
1119
1120
@dbus.service.method(_interface, in_signature="o")
1407
1121
def RemoveClient(self, object_path):
1408
"D-Bus method"
1409
1122
for c in clients:
1410
1123
if c.dbus_object_path == object_path:
1411
1124
clients.remove(c)
1412
c.remove_from_connection()
1413
1125
# Don't signal anything except ClientRemoved
1414
c.disable(signal=False)
1126
c.use_dbus = False
1127
c.disable()
1415
1128
# Emit D-Bus signal
1416
self.ClientRemoved(object_path, c.name)
1129
self.ClientRemoved(object_path)
1417
1130
return
1418
1131
raise KeyError
1419
1132
@dbus.service.method(_interface)
1133
def Quit(self):
1134
main_loop.quit()
1135
1420
1136
del _interface
1421
1422
mandos_dbus_service = MandosDBusService()
1137
1138
mandos_server = MandosServer()
1423
1139
1424
1140
for client in clients:
1425
1141
if use_dbus:
1426
1142
# Emit D-Bus signal
1427
mandos_dbus_service.ClientAdded(client.dbus_object_path,
1428
client.GetAllProperties())
1143
mandos_server.ClientAdded(client.dbus_object_path,
1144
client.GetAllProperties())
1429
1145
client.enable()
1430
1146
1431
1147
tcp_server.enable()
1433
1149
1434
1150
# Find out what port we got
1435
1151
service.port = tcp_server.socket.getsockname()[1]
1436
if use_ipv6:
1437
logger.info(u"Now listening on address %r, port %d,"
1438
" flowinfo %d, scope_id %d"
1439
% tcp_server.socket.getsockname())
1440
else: # IPv4
1441
logger.info(u"Now listening on address %r, port %d"
1442
% 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())
1443
1154
1444
1155
#service.interface = tcp_server.socket.getsockname()[3]
1445
1156
1446
1157
try:
1447
1158
# From the Avahi example code
1159
server.connect_to_signal("StateChanged", server_state_changed)
1448
1160
try:
1449
service.activate()
1161
server_state_changed(server.GetState())
1450
1162
except dbus.exceptions.DBusException, error:
1451
1163
logger.critical(u"DBusException: %s", error)
1452
1164
sys.exit(1)
1464
1176
sys.exit(1)
1465
1177
except KeyboardInterrupt:
1466
1178
if debug:
1467
print >> sys.stderr
1468
logger.debug(u"Server received KeyboardInterrupt")
1469
logger.debug(u"Server exiting")
1179
print
1470
1180
1471
1181
if __name__ == '__main__':
1472
1182
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0