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- Committer: Teddy Hogeborn
- Date: 2009-03-27 13:33:17 UTC
- mfrom: (288.1.2 mandos-pipe-ipc)
- Revision ID: teddy@fukt.bsnet.se-20090327133317-riwt5s5orrisozuj
Merge from pipe IPC branch.
* mandos (AvahiService.rename, main): Include PID in log messages when
using a different service name.
(Client.ReceivedSecret, Client.Rejected): New D-Bus signals.
(TCP_handler.handle): Send IPC to parent process.
(ForkingMixInWithPipe): New mixin class.
(IPv6_TCPServer): Inherit from ForkingMixInWithPipe instead of
SocketServer.ForkingMixIn.
(IPv6_TCPServer.handle_ipc): New method.
(main/mandos_server): Renamed to "mandos_dbus_service" and made
global.
(main/MandosServer): Renamed to "MandosDBusService".
(main/MandosDBusService.ClientNotFound): New D-Bus signal.
* mandos (AvahiService.rename, main): Include PID in log messages when
using a different service name.
(Client.ReceivedSecret, Client.Rejected): New D-Bus signals.
(TCP_handler.handle): Send IPC to parent process.
(ForkingMixInWithPipe): New mixin class.
(IPv6_TCPServer): Inherit from ForkingMixInWithPipe instead of
SocketServer.ForkingMixIn.
(IPv6_TCPServer.handle_ipc): New method.
(main/mandos_server): Renamed to "mandos_dbus_service" and made
global.
(main/MandosServer): Renamed to "MandosDBusService".
(main/MandosDBusService.ClientNotFound): New D-Bus signal.
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
69
version = "1.0.8"
81
70
82
logger = logging.Logger(u'mandos')
71
logger = logging.Logger('mandos')
83
72
syslogger = (logging.handlers.SysLogHandler
84
73
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
85
74
address = "/dev/log"))
86
75
syslogger.setFormatter(logging.Formatter
87
(u'Mandos [%(process)d]: %(levelname)s:'
88
u' %(message)s'))
76
('Mandos [%(process)d]: %(levelname)s:'
77
' %(message)s'))
89
78
logger.addHandler(syslogger)
90
79
91
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console = logging.StreamHandler()
92
console.setFormatter(logging.Formatter(u'%(name)s [%(process)d]:'
93
u' %(levelname)s:'
94
u' %(message)s'))
81
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
82
' %(levelname)s: %(message)s'))
95
83
logger.addHandler(console)
96
84
97
85
class AvahiError(Exception):
110
98
111
99
class AvahiService(object):
112
100
"""An Avahi (Zeroconf) service.
113
114
101
Attributes:
115
102
interface: integer; avahi.IF_UNSPEC or an interface index.
116
103
Used to optionally bind to the specified interface.
117
name: string; Example: u'Mandos'
118
type: string; Example: u'_mandos._tcp'.
104
name: string; Example: 'Mandos'
105
type: string; Example: '_mandos._tcp'.
119
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See <http://www.dns-sd.org/ServiceTypes.html>
120
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port: integer; what port to announce
121
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TXT: list of strings; TXT record for the service
124
111
max_renames: integer; maximum number of renames
125
112
rename_count: integer; counter so we only rename after collisions
126
113
a sensible number of times
127
group: D-Bus Entry Group
128
server: D-Bus Server
129
bus: dbus.SystemBus()
130
114
"""
131
115
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
132
116
servicetype = None, port = None, TXT = None,
133
domain = u"", host = u"", max_renames = 32768,
134
protocol = avahi.PROTO_UNSPEC, bus = None):
117
domain = "", host = "", max_renames = 32768,
118
protocol = avahi.PROTO_UNSPEC):
135
119
self.interface = interface
136
120
self.name = name
137
121
self.type = servicetype
142
126
self.rename_count = 0
143
127
self.max_renames = max_renames
144
128
self.protocol = protocol
145
self.group = None # our entry group
146
self.server = None
147
self.bus = bus
148
129
def rename(self):
149
130
"""Derived from the Avahi example code"""
150
131
if self.rename_count >= self.max_renames:
152
133
u" after %i retries, exiting.",
153
134
self.rename_count)
154
135
raise AvahiServiceError(u"Too many renames")
155
self.name = self.server.GetAlternativeServiceName(self.name)
136
self.name = server.GetAlternativeServiceName(self.name)
156
137
logger.info(u"Changing Zeroconf service name to %r ...",
157
unicode(self.name))
138
str(self.name))
158
139
syslogger.setFormatter(logging.Formatter
159
(u'Mandos (%s) [%%(process)d]:'
160
u' %%(levelname)s: %%(message)s'
140
('Mandos (%s) [%%(process)d]:'
141
' %%(levelname)s: %%(message)s'
161
142
% self.name))
162
143
self.remove()
163
144
self.add()
164
145
self.rename_count += 1
165
146
def remove(self):
166
147
"""Derived from the Avahi example code"""
167
if self.group is not None:
168
self.group.Reset()
148
if group is not None:
149
group.Reset()
169
150
def add(self):
170
151
"""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)
152
global group
153
if group is None:
154
group = dbus.Interface(bus.get_object
155
(avahi.DBUS_NAME,
156
server.EntryGroupNew()),
157
avahi.DBUS_INTERFACE_ENTRY_GROUP)
158
group.connect_to_signal('StateChanged',
159
entry_group_state_changed)
178
160
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):
161
service.name, service.type)
162
group.AddService(
163
self.interface, # interface
164
self.protocol, # protocol
165
dbus.UInt32(0), # flags
166
self.name, self.type,
167
self.domain, self.host,
168
dbus.UInt16(self.port),
169
avahi.string_array_to_txt_array(self.TXT))
170
group.Commit()
171
172
# From the Avahi example code:
173
group = None # our entry group
174
# End of Avahi example code
175
176
177
def _datetime_to_dbus(dt, variant_level=0):
178
"""Convert a UTC datetime.datetime() to a D-Bus type."""
179
return dbus.String(dt.isoformat(), variant_level=variant_level)
180
181
182
class Client(dbus.service.Object):
228
183
"""A representation of a client host served by this server.
229
230
184
Attributes:
231
185
name: string; from the config file, used in log messages and
232
186
D-Bus identifiers
253
207
runtime with vars(self) as dict, so that for
254
208
instance %(name)s can be used in the command.
255
209
current_checker_command: string; current running checker_command
210
use_dbus: bool(); Whether to provide D-Bus interface and signals
211
dbus_object_path: dbus.ObjectPath ; only set if self.use_dbus
256
212
"""
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
213
def timeout_milliseconds(self):
266
214
"Return the 'timeout' attribute in milliseconds"
267
return self._datetime_to_milliseconds(self.timeout)
215
return ((self.timeout.days * 24 * 60 * 60 * 1000)
216
+ (self.timeout.seconds * 1000)
217
+ (self.timeout.microseconds // 1000))
268
218
269
219
def interval_milliseconds(self):
270
220
"Return the 'interval' attribute in milliseconds"
271
return self._datetime_to_milliseconds(self.interval)
221
return ((self.interval.days * 24 * 60 * 60 * 1000)
222
+ (self.interval.seconds * 1000)
223
+ (self.interval.microseconds // 1000))
272
224
273
def __init__(self, name = None, disable_hook=None, config=None):
225
def __init__(self, name = None, disable_hook=None, config=None,
226
use_dbus=True):
274
227
"""Note: the 'checker' key in 'config' sets the
275
228
'checker_command' attribute and *not* the 'checker'
276
229
attribute."""
278
231
if config is None:
279
232
config = {}
280
233
logger.debug(u"Creating client %r", self.name)
234
self.use_dbus = False # During __init__
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"]
263
self.checker_command = config["checker"]
310
264
self.current_checker_command = None
311
265
self.last_connect = None
266
# Only now, when this client is initialized, can it show up on
267
# the D-Bus
268
self.use_dbus = use_dbus
269
if self.use_dbus:
270
self.dbus_object_path = (dbus.ObjectPath
271
("/clients/"
272
+ self.name.replace(".", "_")))
273
dbus.service.Object.__init__(self, bus,
274
self.dbus_object_path)
312
275
313
276
def enable(self):
314
277
"""Start this client's checker and timeout hooks"""
315
if getattr(self, u"enabled", False):
316
# Already enabled
317
return
318
278
self.last_enabled = datetime.datetime.utcnow()
319
279
# Schedule a new checker to be started an 'interval' from now,
320
280
# and every interval from then on.
328
288
(self.timeout_milliseconds(),
329
289
self.disable))
330
290
self.enabled = True
291
if self.use_dbus:
292
# Emit D-Bus signals
293
self.PropertyChanged(dbus.String(u"enabled"),
294
dbus.Boolean(True, variant_level=1))
295
self.PropertyChanged(dbus.String(u"last_enabled"),
296
(_datetime_to_dbus(self.last_enabled,
297
variant_level=1)))
331
298
332
299
def disable(self):
333
300
"""Disable this client."""
334
301
if not getattr(self, "enabled", False):
335
302
return False
336
303
logger.info(u"Disabling client %s", self.name)
337
if getattr(self, u"disable_initiator_tag", False):
304
if getattr(self, "disable_initiator_tag", False):
338
305
gobject.source_remove(self.disable_initiator_tag)
339
306
self.disable_initiator_tag = None
340
if getattr(self, u"checker_initiator_tag", False):
307
if getattr(self, "checker_initiator_tag", False):
341
308
gobject.source_remove(self.checker_initiator_tag)
342
309
self.checker_initiator_tag = None
343
310
self.stop_checker()
344
311
if self.disable_hook:
345
312
self.disable_hook(self)
346
313
self.enabled = False
314
if self.use_dbus:
315
# Emit D-Bus signal
316
self.PropertyChanged(dbus.String(u"enabled"),
317
dbus.Boolean(False, variant_level=1))
347
318
# Do not run this again if called by a gobject.timeout_add
348
319
return False
349
320
355
326
"""The checker has completed, so take appropriate actions."""
356
327
self.checker_callback_tag = None
357
328
self.checker = None
329
if self.use_dbus:
330
# Emit D-Bus signal
331
self.PropertyChanged(dbus.String(u"checker_running"),
332
dbus.Boolean(False, variant_level=1))
358
333
if os.WIFEXITED(condition):
359
334
exitstatus = os.WEXITSTATUS(condition)
360
335
if exitstatus == 0:
364
339
else:
365
340
logger.info(u"Checker for %(name)s failed",
366
341
vars(self))
342
if self.use_dbus:
343
# Emit D-Bus signal
344
self.CheckerCompleted(dbus.Int16(exitstatus),
345
dbus.Int64(condition),
346
dbus.String(command))
367
347
else:
368
348
logger.warning(u"Checker for %(name)s crashed?",
369
349
vars(self))
350
if self.use_dbus:
351
# Emit D-Bus signal
352
self.CheckerCompleted(dbus.Int16(-1),
353
dbus.Int64(condition),
354
dbus.String(command))
370
355
371
356
def checked_ok(self):
372
357
"""Bump up the timeout for this client.
373
374
358
This should only be called when the client has been seen,
375
359
alive and well.
376
360
"""
379
363
self.disable_initiator_tag = (gobject.timeout_add
380
364
(self.timeout_milliseconds(),
381
365
self.disable))
366
if self.use_dbus:
367
# Emit D-Bus signal
368
self.PropertyChanged(
369
dbus.String(u"last_checked_ok"),
370
(_datetime_to_dbus(self.last_checked_ok,
371
variant_level=1)))
382
372
383
373
def start_checker(self):
384
374
"""Start a new checker subprocess if one is not running.
385
386
375
If a checker already exists, leave it running and do
387
376
nothing."""
388
377
# The reason for not killing a running checker is that if we
398
387
if self.checker is not None:
399
388
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
400
389
if pid:
401
logger.warning(u"Checker was a zombie")
390
logger.warning("Checker was a zombie")
402
391
gobject.source_remove(self.checker_callback_tag)
403
392
self.checker_callback(pid, status,
404
393
self.current_checker_command)
409
398
command = self.checker_command % self.host
410
399
except TypeError:
411
400
# Escape attributes for the shell
412
escaped_attrs = dict((key,
413
re.escape(unicode(str(val),
414
errors=
415
u'replace')))
401
escaped_attrs = dict((key, re.escape(str(val)))
416
402
for key, val in
417
403
vars(self).iteritems())
418
404
try:
421
407
logger.error(u'Could not format string "%s":'
422
408
u' %s', self.checker_command, error)
423
409
return True # Try again later
424
self.current_checker_command = command
410
self.current_checker_command = command
425
411
try:
426
412
logger.info(u"Starting checker %r for %s",
427
413
command, self.name)
431
417
# always replaced by /dev/null.)
432
418
self.checker = subprocess.Popen(command,
433
419
close_fds=True,
434
shell=True, cwd=u"/")
420
shell=True, cwd="/")
421
if self.use_dbus:
422
# Emit D-Bus signal
423
self.CheckerStarted(command)
424
self.PropertyChanged(
425
dbus.String("checker_running"),
426
dbus.Boolean(True, variant_level=1))
435
427
self.checker_callback_tag = (gobject.child_watch_add
436
428
(self.checker.pid,
437
429
self.checker_callback,
453
445
if self.checker_callback_tag:
454
446
gobject.source_remove(self.checker_callback_tag)
455
447
self.checker_callback_tag = None
456
if getattr(self, u"checker", None) is None:
448
if getattr(self, "checker", None) is None:
457
449
return
458
450
logger.debug(u"Stopping checker for %(name)s", vars(self))
459
451
try:
465
457
if error.errno != errno.ESRCH: # No such process
466
458
raise
467
459
self.checker = None
460
if self.use_dbus:
461
self.PropertyChanged(dbus.String(u"checker_running"),
462
dbus.Boolean(False, variant_level=1))
468
463
469
464
def still_valid(self):
470
465
"""Has the timeout not yet passed for this client?"""
471
if not getattr(self, u"enabled", False):
466
if not getattr(self, "enabled", False):
472
467
return False
473
468
now = datetime.datetime.utcnow()
474
469
if self.last_checked_ok is None:
475
470
return now < (self.created + self.timeout)
476
471
else:
477
472
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
473
594
474
## D-Bus methods & signals
595
475
_interface = u"se.bsnet.fukt.Mandos.Client"
596
476
597
477
# CheckedOK - method
598
@dbus.service.method(_interface)
599
def CheckedOK(self):
600
return self.checked_ok()
478
CheckedOK = dbus.service.method(_interface)(checked_ok)
479
CheckedOK.__name__ = "CheckedOK"
601
480
602
481
# CheckerCompleted - signal
603
@dbus.service.signal(_interface, signature=u"nxs")
482
@dbus.service.signal(_interface, signature="nxs")
604
483
def CheckerCompleted(self, exitcode, waitstatus, command):
605
484
"D-Bus signal"
606
485
pass
607
486
608
487
# CheckerStarted - signal
609
@dbus.service.signal(_interface, signature=u"s")
488
@dbus.service.signal(_interface, signature="s")
610
489
def CheckerStarted(self, command):
611
490
"D-Bus signal"
612
491
pass
613
492
614
493
# GetAllProperties - method
615
@dbus.service.method(_interface, out_signature=u"a{sv}")
494
@dbus.service.method(_interface, out_signature="a{sv}")
616
495
def GetAllProperties(self):
617
496
"D-Bus method"
618
497
return dbus.Dictionary({
619
dbus.String(u"name"):
498
dbus.String("name"):
620
499
dbus.String(self.name, variant_level=1),
621
dbus.String(u"fingerprint"):
500
dbus.String("fingerprint"):
622
501
dbus.String(self.fingerprint, variant_level=1),
623
dbus.String(u"host"):
502
dbus.String("host"):
624
503
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)
504
dbus.String("created"):
505
_datetime_to_dbus(self.created, variant_level=1),
506
dbus.String("last_enabled"):
507
(_datetime_to_dbus(self.last_enabled,
508
variant_level=1)
631
509
if self.last_enabled is not None
632
510
else dbus.Boolean(False, variant_level=1)),
633
dbus.String(u"enabled"):
511
dbus.String("enabled"):
634
512
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)
513
dbus.String("last_checked_ok"):
514
(_datetime_to_dbus(self.last_checked_ok,
515
variant_level=1)
638
516
if self.last_checked_ok is not None
639
517
else dbus.Boolean (False, variant_level=1)),
640
dbus.String(u"timeout"):
518
dbus.String("timeout"):
641
519
dbus.UInt64(self.timeout_milliseconds(),
642
520
variant_level=1),
643
dbus.String(u"interval"):
521
dbus.String("interval"):
644
522
dbus.UInt64(self.interval_milliseconds(),
645
523
variant_level=1),
646
dbus.String(u"checker"):
524
dbus.String("checker"):
647
525
dbus.String(self.checker_command,
648
526
variant_level=1),
649
dbus.String(u"checker_running"):
527
dbus.String("checker_running"):
650
528
dbus.Boolean(self.checker is not None,
651
529
variant_level=1),
652
dbus.String(u"object_path"):
530
dbus.String("object_path"):
653
531
dbus.ObjectPath(self.dbus_object_path,
654
532
variant_level=1)
655
}, signature=u"sv")
533
}, signature="sv")
656
534
657
535
# IsStillValid - method
658
@dbus.service.method(_interface, out_signature=u"b")
659
def IsStillValid(self):
660
return self.still_valid()
536
IsStillValid = (dbus.service.method(_interface, out_signature="b")
537
(still_valid))
538
IsStillValid.__name__ = "IsStillValid"
661
539
662
540
# PropertyChanged - signal
663
@dbus.service.signal(_interface, signature=u"sv")
541
@dbus.service.signal(_interface, signature="sv")
664
542
def PropertyChanged(self, property, value):
665
543
"D-Bus signal"
666
544
pass
678
556
pass
679
557
680
558
# SetChecker - method
681
@dbus.service.method(_interface, in_signature=u"s")
559
@dbus.service.method(_interface, in_signature="s")
682
560
def SetChecker(self, checker):
683
561
"D-Bus setter method"
684
562
self.checker_command = checker
688
566
variant_level=1))
689
567
690
568
# SetHost - method
691
@dbus.service.method(_interface, in_signature=u"s")
569
@dbus.service.method(_interface, in_signature="s")
692
570
def SetHost(self, host):
693
571
"D-Bus setter method"
694
572
self.host = host
697
575
dbus.String(self.host, variant_level=1))
698
576
699
577
# SetInterval - method
700
@dbus.service.method(_interface, in_signature=u"t")
578
@dbus.service.method(_interface, in_signature="t")
701
579
def SetInterval(self, milliseconds):
702
580
self.interval = datetime.timedelta(0, 0, 0, milliseconds)
703
581
# Emit D-Bus signal
706
584
variant_level=1)))
707
585
708
586
# SetSecret - method
709
@dbus.service.method(_interface, in_signature=u"ay",
587
@dbus.service.method(_interface, in_signature="ay",
710
588
byte_arrays=True)
711
589
def SetSecret(self, secret):
712
590
"D-Bus setter method"
713
591
self.secret = str(secret)
714
592
715
593
# SetTimeout - method
716
@dbus.service.method(_interface, in_signature=u"t")
594
@dbus.service.method(_interface, in_signature="t")
717
595
def SetTimeout(self, milliseconds):
718
596
self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
719
597
# Emit D-Bus signal
722
600
variant_level=1)))
723
601
724
602
# Enable - method
725
@dbus.service.method(_interface)
726
def Enable(self):
727
"D-Bus method"
728
self.enable()
603
Enable = dbus.service.method(_interface)(enable)
604
Enable.__name__ = "Enable"
729
605
730
606
# StartChecker - method
731
607
@dbus.service.method(_interface)
740
616
self.disable()
741
617
742
618
# StopChecker - method
743
@dbus.service.method(_interface)
744
def StopChecker(self):
745
self.stop_checker()
619
StopChecker = dbus.service.method(_interface)(stop_checker)
620
StopChecker.__name__ = "StopChecker"
746
621
747
622
del _interface
748
623
749
624
750
class ClientHandler(socketserver.BaseRequestHandler, object):
751
"""A class to handle client connections.
752
753
Instantiated once for each connection to handle it.
625
def peer_certificate(session):
626
"Return the peer's OpenPGP certificate as a bytestring"
627
# If not an OpenPGP certificate...
628
if (gnutls.library.functions
629
.gnutls_certificate_type_get(session._c_object)
630
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
631
# ...do the normal thing
632
return session.peer_certificate
633
list_size = ctypes.c_uint(1)
634
cert_list = (gnutls.library.functions
635
.gnutls_certificate_get_peers
636
(session._c_object, ctypes.byref(list_size)))
637
if not bool(cert_list) and list_size.value != 0:
638
raise gnutls.errors.GNUTLSError("error getting peer"
639
" certificate")
640
if list_size.value == 0:
641
return None
642
cert = cert_list[0]
643
return ctypes.string_at(cert.data, cert.size)
644
645
646
def fingerprint(openpgp):
647
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
648
# New GnuTLS "datum" with the OpenPGP public key
649
datum = (gnutls.library.types
650
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
651
ctypes.POINTER
652
(ctypes.c_ubyte)),
653
ctypes.c_uint(len(openpgp))))
654
# New empty GnuTLS certificate
655
crt = gnutls.library.types.gnutls_openpgp_crt_t()
656
(gnutls.library.functions
657
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
658
# Import the OpenPGP public key into the certificate
659
(gnutls.library.functions
660
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
661
gnutls.library.constants
662
.GNUTLS_OPENPGP_FMT_RAW))
663
# Verify the self signature in the key
664
crtverify = ctypes.c_uint()
665
(gnutls.library.functions
666
.gnutls_openpgp_crt_verify_self(crt, 0, ctypes.byref(crtverify)))
667
if crtverify.value != 0:
668
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
669
raise gnutls.errors.CertificateSecurityError("Verify failed")
670
# New buffer for the fingerprint
671
buf = ctypes.create_string_buffer(20)
672
buf_len = ctypes.c_size_t()
673
# Get the fingerprint from the certificate into the buffer
674
(gnutls.library.functions
675
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
676
ctypes.byref(buf_len)))
677
# Deinit the certificate
678
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
679
# Convert the buffer to a Python bytestring
680
fpr = ctypes.string_at(buf, buf_len.value)
681
# Convert the bytestring to hexadecimal notation
682
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
683
return hex_fpr
684
685
686
class TCP_handler(SocketServer.BaseRequestHandler, object):
687
"""A TCP request handler class.
688
Instantiated by IPv6_TCPServer for each request to handle it.
754
689
Note: This will run in its own forked process."""
755
690
756
691
def handle(self):
758
693
unicode(self.client_address))
759
694
logger.debug(u"IPC Pipe FD: %d", self.server.pipe[1])
760
695
# Open IPC pipe to parent process
761
with closing(os.fdopen(self.server.pipe[1], u"w", 1)) as ipc:
696
with closing(os.fdopen(self.server.pipe[1], "w", 1)) as ipc:
762
697
session = (gnutls.connection
763
698
.ClientSession(self.request,
764
699
gnutls.connection
778
713
# no X.509 keys are added to it. Therefore, we can use it
779
714
# here despite using OpenPGP certificates.
780
715
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"))
716
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
717
# "+AES-256-CBC", "+SHA1",
718
# "+COMP-NULL", "+CTYPE-OPENPGP",
719
# "+DHE-DSS"))
785
720
# Use a fallback default, since this MUST be set.
786
priority = self.server.gnutls_priority
787
if priority is None:
788
priority = u"NORMAL"
721
priority = self.server.settings.get("priority", "NORMAL")
789
722
(gnutls.library.functions
790
723
.gnutls_priority_set_direct(session._c_object,
791
724
priority, None))
799
732
return
800
733
logger.debug(u"Handshake succeeded")
801
734
try:
802
fpr = self.fingerprint(self.peer_certificate(session))
735
fpr = fingerprint(peer_certificate(session))
803
736
except (TypeError, gnutls.errors.GNUTLSError), error:
804
737
logger.warning(u"Bad certificate: %s", error)
805
738
session.bye()
811
744
client = c
812
745
break
813
746
else:
814
ipc.write(u"NOTFOUND %s\n" % fpr)
747
logger.warning(u"Client not found for fingerprint: %s",
748
fpr)
749
ipc.write("NOTFOUND %s\n" % fpr)
815
750
session.bye()
816
751
return
817
752
# Have to check if client.still_valid(), since it is
818
753
# possible that the client timed out while establishing
819
754
# the GnuTLS session.
820
755
if not client.still_valid():
821
ipc.write(u"INVALID %s\n" % client.name)
756
logger.warning(u"Client %(name)s is invalid",
757
vars(client))
758
ipc.write("INVALID %s\n" % client.name)
822
759
session.bye()
823
760
return
824
ipc.write(u"SENDING %s\n" % client.name)
761
ipc.write("SENDING %s\n" % client.name)
825
762
sent_size = 0
826
763
while sent_size < len(client.secret):
827
764
sent = session.send(client.secret[sent_size:])
830
767
- (sent_size + sent))
831
768
sent_size += sent
832
769
session.bye()
833
834
@staticmethod
835
def peer_certificate(session):
836
"Return the peer's OpenPGP certificate as a bytestring"
837
# If not an OpenPGP certificate...
838
if (gnutls.library.functions
839
.gnutls_certificate_type_get(session._c_object)
840
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
841
# ...do the normal thing
842
return session.peer_certificate
843
list_size = ctypes.c_uint(1)
844
cert_list = (gnutls.library.functions
845
.gnutls_certificate_get_peers
846
(session._c_object, ctypes.byref(list_size)))
847
if not bool(cert_list) and list_size.value != 0:
848
raise gnutls.errors.GNUTLSError(u"error getting peer"
849
u" certificate")
850
if list_size.value == 0:
851
return None
852
cert = cert_list[0]
853
return ctypes.string_at(cert.data, cert.size)
854
855
@staticmethod
856
def fingerprint(openpgp):
857
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
858
# New GnuTLS "datum" with the OpenPGP public key
859
datum = (gnutls.library.types
860
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
861
ctypes.POINTER
862
(ctypes.c_ubyte)),
863
ctypes.c_uint(len(openpgp))))
864
# New empty GnuTLS certificate
865
crt = gnutls.library.types.gnutls_openpgp_crt_t()
866
(gnutls.library.functions
867
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
868
# Import the OpenPGP public key into the certificate
869
(gnutls.library.functions
870
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
871
gnutls.library.constants
872
.GNUTLS_OPENPGP_FMT_RAW))
873
# Verify the self signature in the key
874
crtverify = ctypes.c_uint()
875
(gnutls.library.functions
876
.gnutls_openpgp_crt_verify_self(crt, 0,
877
ctypes.byref(crtverify)))
878
if crtverify.value != 0:
879
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
880
raise (gnutls.errors.CertificateSecurityError
881
(u"Verify failed"))
882
# New buffer for the fingerprint
883
buf = ctypes.create_string_buffer(20)
884
buf_len = ctypes.c_size_t()
885
# Get the fingerprint from the certificate into the buffer
886
(gnutls.library.functions
887
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
888
ctypes.byref(buf_len)))
889
# Deinit the certificate
890
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
891
# Convert the buffer to a Python bytestring
892
fpr = ctypes.string_at(buf, buf_len.value)
893
# Convert the bytestring to hexadecimal notation
894
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
895
return hex_fpr
896
897
898
class ForkingMixInWithPipe(socketserver.ForkingMixIn, object):
899
"""Like socketserver.ForkingMixIn, but also pass a pipe."""
770
771
772
class ForkingMixInWithPipe(SocketServer.ForkingMixIn, object):
773
"""Like SocketServer.ForkingMixIn, but also pass a pipe.
774
Assumes a gobject.MainLoop event loop.
775
"""
900
776
def process_request(self, request, client_address):
901
"""Overrides and wraps the original process_request().
902
777
"""This overrides and wraps the original process_request().
903
778
This function creates a new pipe in self.pipe
904
779
"""
905
780
self.pipe = os.pipe()
906
781
super(ForkingMixInWithPipe,
907
782
self).process_request(request, client_address)
908
783
os.close(self.pipe[1]) # close write end
909
self.add_pipe(self.pipe[0])
910
def add_pipe(self, pipe):
784
# Call "handle_ipc" for both data and EOF events
785
gobject.io_add_watch(self.pipe[0],
786
gobject.IO_IN | gobject.IO_HUP,
787
self.handle_ipc)
788
def handle_ipc(source, condition):
911
789
"""Dummy function; override as necessary"""
912
os.close(pipe)
790
os.close(source)
791
return False
913
792
914
793
915
794
class IPv6_TCPServer(ForkingMixInWithPipe,
916
socketserver.TCPServer, object):
795
SocketServer.TCPServer, object):
917
796
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
918
919
797
Attributes:
798
settings: Server settings
799
clients: Set() of Client objects
920
800
enabled: Boolean; whether this server is activated yet
921
interface: None or a network interface name (string)
922
use_ipv6: Boolean; to use IPv6 or not
923
801
"""
924
def __init__(self, server_address, RequestHandlerClass,
925
interface=None, use_ipv6=True):
926
self.interface = interface
927
if use_ipv6:
928
self.address_family = socket.AF_INET6
929
socketserver.TCPServer.__init__(self, server_address,
930
RequestHandlerClass)
802
address_family = socket.AF_INET6
803
def __init__(self, *args, **kwargs):
804
if "settings" in kwargs:
805
self.settings = kwargs["settings"]
806
del kwargs["settings"]
807
if "clients" in kwargs:
808
self.clients = kwargs["clients"]
809
del kwargs["clients"]
810
if "use_ipv6" in kwargs:
811
if not kwargs["use_ipv6"]:
812
self.address_family = socket.AF_INET
813
del kwargs["use_ipv6"]
814
self.enabled = False
815
super(IPv6_TCPServer, self).__init__(*args, **kwargs)
931
816
def server_bind(self):
932
817
"""This overrides the normal server_bind() function
933
818
to bind to an interface if one was specified, and also NOT to
934
819
bind to an address or port if they were not specified."""
935
if self.interface is not None:
936
if SO_BINDTODEVICE is None:
937
logger.error(u"SO_BINDTODEVICE does not exist;"
938
u" cannot bind to interface %s",
939
self.interface)
940
else:
941
try:
942
self.socket.setsockopt(socket.SOL_SOCKET,
943
SO_BINDTODEVICE,
944
str(self.interface
945
+ u'\0'))
946
except socket.error, error:
947
if error[0] == errno.EPERM:
948
logger.error(u"No permission to"
949
u" bind to interface %s",
950
self.interface)
951
elif error[0] == errno.ENOPROTOOPT:
952
logger.error(u"SO_BINDTODEVICE not available;"
953
u" cannot bind to interface %s",
954
self.interface)
955
else:
956
raise
820
if self.settings["interface"]:
821
# 25 is from /usr/include/asm-i486/socket.h
822
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
823
try:
824
self.socket.setsockopt(socket.SOL_SOCKET,
825
SO_BINDTODEVICE,
826
self.settings["interface"])
827
except socket.error, error:
828
if error[0] == errno.EPERM:
829
logger.error(u"No permission to"
830
u" bind to interface %s",
831
self.settings["interface"])
832
else:
833
raise
957
834
# Only bind(2) the socket if we really need to.
958
835
if self.server_address[0] or self.server_address[1]:
959
836
if not self.server_address[0]:
960
837
if self.address_family == socket.AF_INET6:
961
any_address = u"::" # in6addr_any
838
any_address = "::" # in6addr_any
962
839
else:
963
840
any_address = socket.INADDR_ANY
964
841
self.server_address = (any_address,
966
843
elif not self.server_address[1]:
967
844
self.server_address = (self.server_address[0],
968
845
0)
969
# if self.interface:
846
# if self.settings["interface"]:
970
847
# self.server_address = (self.server_address[0],
971
848
# 0, # port
972
849
# 0, # flowinfo
973
850
# if_nametoindex
974
# (self.interface))
975
return socketserver.TCPServer.server_bind(self)
976
977
978
class MandosServer(IPv6_TCPServer):
979
"""Mandos server.
980
981
Attributes:
982
clients: set of Client objects
983
gnutls_priority GnuTLS priority string
984
use_dbus: Boolean; to emit D-Bus signals or not
985
clients: set of Client objects
986
gnutls_priority GnuTLS priority string
987
use_dbus: Boolean; to emit D-Bus signals or not
988
989
Assumes a gobject.MainLoop event loop.
990
"""
991
def __init__(self, server_address, RequestHandlerClass,
992
interface=None, use_ipv6=True, clients=None,
993
gnutls_priority=None, use_dbus=True):
994
self.enabled = False
995
self.clients = clients
996
if self.clients is None:
997
self.clients = set()
998
self.use_dbus = use_dbus
999
self.gnutls_priority = gnutls_priority
1000
IPv6_TCPServer.__init__(self, server_address,
1001
RequestHandlerClass,
1002
interface = interface,
1003
use_ipv6 = use_ipv6)
851
# (self.settings
852
# ["interface"]))
853
return super(IPv6_TCPServer, self).server_bind()
1004
854
def server_activate(self):
1005
855
if self.enabled:
1006
return socketserver.TCPServer.server_activate(self)
856
return super(IPv6_TCPServer, self).server_activate()
1007
857
def enable(self):
1008
858
self.enabled = True
1009
def add_pipe(self, pipe):
1010
# Call "handle_ipc" for both data and EOF events
1011
gobject.io_add_watch(pipe, gobject.IO_IN | gobject.IO_HUP,
1012
self.handle_ipc)
1013
859
def handle_ipc(self, source, condition, file_objects={}):
1014
860
condition_names = {
1015
gobject.IO_IN: u"IN", # There is data to read.
1016
gobject.IO_OUT: u"OUT", # Data can be written (without
1017
# blocking).
1018
gobject.IO_PRI: u"PRI", # There is urgent data to read.
1019
gobject.IO_ERR: u"ERR", # Error condition.
1020
gobject.IO_HUP: u"HUP" # Hung up (the connection has been
1021
# broken, usually for pipes and
1022
# sockets).
861
gobject.IO_IN: "IN", # There is data to read.
862
gobject.IO_OUT: "OUT", # Data can be written (without
863
# blocking).
864
gobject.IO_PRI: "PRI", # There is urgent data to read.
865
gobject.IO_ERR: "ERR", # Error condition.
866
gobject.IO_HUP: "HUP" # Hung up (the connection has been
867
# broken, usually for pipes and
868
# sockets).
1023
869
}
1024
870
conditions_string = ' | '.join(name
1025
871
for cond, name in
1026
872
condition_names.iteritems()
1027
873
if cond & condition)
1028
logger.debug(u"Handling IPC: FD = %d, condition = %s", source,
874
logger.debug("Handling IPC: FD = %d, condition = %s", source,
1029
875
conditions_string)
1030
876
1031
877
# Turn the pipe file descriptor into a Python file object
1032
878
if source not in file_objects:
1033
file_objects[source] = os.fdopen(source, u"r", 1)
879
file_objects[source] = os.fdopen(source, "r", 1)
1034
880
1035
881
# Read a line from the file object
1036
882
cmdline = file_objects[source].readline()
1042
888
# Stop calling this function
1043
889
return False
1044
890
1045
logger.debug(u"IPC command: %r", cmdline)
891
logger.debug("IPC command: %r\n" % cmdline)
1046
892
1047
893
# Parse and act on command
1048
cmd, args = cmdline.rstrip(u"\r\n").split(None, 1)
1049
1050
if cmd == u"NOTFOUND":
1051
logger.warning(u"Client not found for fingerprint: %s",
1052
args)
1053
if self.use_dbus:
894
cmd, args = cmdline.split(None, 1)
895
if cmd == "NOTFOUND":
896
if self.settings["use_dbus"]:
1054
897
# Emit D-Bus signal
1055
898
mandos_dbus_service.ClientNotFound(args)
1056
elif cmd == u"INVALID":
1057
for client in self.clients:
1058
if client.name == args:
1059
logger.warning(u"Client %s is invalid", args)
1060
if self.use_dbus:
899
elif cmd == "INVALID":
900
if self.settings["use_dbus"]:
901
for client in self.clients:
902
if client.name == args:
1061
903
# Emit D-Bus signal
1062
904
client.Rejected()
1063
break
1064
else:
1065
logger.error(u"Unknown client %s is invalid", args)
1066
elif cmd == u"SENDING":
905
break
906
elif cmd == "SENDING":
1067
907
for client in self.clients:
1068
908
if client.name == args:
1069
logger.info(u"Sending secret to %s", client.name)
1070
909
client.checked_ok()
1071
if self.use_dbus:
910
if self.settings["use_dbus"]:
1072
911
# Emit D-Bus signal
1073
912
client.ReceivedSecret()
1074
913
break
1075
else:
1076
logger.error(u"Sending secret to unknown client %s",
1077
args)
1078
914
else:
1079
logger.error(u"Unknown IPC command: %r", cmdline)
915
logger.error("Unknown IPC command: %r", cmdline)
1080
916
1081
917
# Keep calling this function
1082
918
return True
1085
921
def string_to_delta(interval):
1086
922
"""Parse a string and return a datetime.timedelta
1087
923
1088
>>> string_to_delta(u'7d')
924
>>> string_to_delta('7d')
1089
925
datetime.timedelta(7)
1090
>>> string_to_delta(u'60s')
926
>>> string_to_delta('60s')
1091
927
datetime.timedelta(0, 60)
1092
>>> string_to_delta(u'60m')
928
>>> string_to_delta('60m')
1093
929
datetime.timedelta(0, 3600)
1094
>>> string_to_delta(u'24h')
930
>>> string_to_delta('24h')
1095
931
datetime.timedelta(1)
1096
932
>>> string_to_delta(u'1w')
1097
933
datetime.timedelta(7)
1098
>>> string_to_delta(u'5m 30s')
934
>>> string_to_delta('5m 30s')
1099
935
datetime.timedelta(0, 330)
1100
936
"""
1101
937
timevalue = datetime.timedelta(0)
1121
957
return timevalue
1122
958
1123
959
960
def server_state_changed(state):
961
"""Derived from the Avahi example code"""
962
if state == avahi.SERVER_COLLISION:
963
logger.error(u"Zeroconf server name collision")
964
service.remove()
965
elif state == avahi.SERVER_RUNNING:
966
service.add()
967
968
969
def entry_group_state_changed(state, error):
970
"""Derived from the Avahi example code"""
971
logger.debug(u"Avahi state change: %i", state)
972
973
if state == avahi.ENTRY_GROUP_ESTABLISHED:
974
logger.debug(u"Zeroconf service established.")
975
elif state == avahi.ENTRY_GROUP_COLLISION:
976
logger.warning(u"Zeroconf service name collision.")
977
service.rename()
978
elif state == avahi.ENTRY_GROUP_FAILURE:
979
logger.critical(u"Avahi: Error in group state changed %s",
980
unicode(error))
981
raise AvahiGroupError(u"State changed: %s" % unicode(error))
982
1124
983
def if_nametoindex(interface):
1125
"""Call the C function if_nametoindex(), or equivalent
1126
1127
Note: This function cannot accept a unicode string."""
984
"""Call the C function if_nametoindex(), or equivalent"""
1128
985
global if_nametoindex
1129
986
try:
1130
987
if_nametoindex = (ctypes.cdll.LoadLibrary
1131
(ctypes.util.find_library(u"c"))
988
(ctypes.util.find_library("c"))
1132
989
.if_nametoindex)
1133
990
except (OSError, AttributeError):
1134
logger.warning(u"Doing if_nametoindex the hard way")
991
if "struct" not in sys.modules:
992
import struct
993
if "fcntl" not in sys.modules:
994
import fcntl
1135
995
def if_nametoindex(interface):
1136
996
"Get an interface index the hard way, i.e. using fcntl()"
1137
997
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1138
998
with closing(socket.socket()) as s:
1139
999
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1140
struct.pack(str(u"16s16x"),
1141
interface))
1142
interface_index = struct.unpack(str(u"I"),
1143
ifreq[16:20])[0]
1000
struct.pack("16s16x", interface))
1001
interface_index = struct.unpack("I", ifreq[16:20])[0]
1144
1002
return interface_index
1145
1003
return if_nametoindex(interface)
1146
1004
1147
1005
1148
1006
def daemon(nochdir = False, noclose = False):
1149
1007
"""See daemon(3). Standard BSD Unix function.
1150
1151
1008
This should really exist as os.daemon, but it doesn't (yet)."""
1152
1009
if os.fork():
1153
1010
sys.exit()
1154
1011
os.setsid()
1155
1012
if not nochdir:
1156
os.chdir(u"/")
1013
os.chdir("/")
1157
1014
if os.fork():
1158
1015
sys.exit()
1159
1016
if not noclose:
1161
1018
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1162
1019
if not stat.S_ISCHR(os.fstat(null).st_mode):
1163
1020
raise OSError(errno.ENODEV,
1164
u"/dev/null not a character device")
1021
"/dev/null not a character device")
1165
1022
os.dup2(null, sys.stdin.fileno())
1166
1023
os.dup2(null, sys.stdout.fileno())
1167
1024
os.dup2(null, sys.stderr.fileno())
1175
1032
# Parsing of options, both command line and config file
1176
1033
1177
1034
parser = optparse.OptionParser(version = "%%prog %s" % version)
1178
parser.add_option("-i", u"--interface", type=u"string",
1179
metavar="IF", help=u"Bind to interface IF")
1180
parser.add_option("-a", u"--address", type=u"string",
1181
help=u"Address to listen for requests on")
1182
parser.add_option("-p", u"--port", type=u"int",
1183
help=u"Port number to receive requests on")
1184
parser.add_option("--check", action=u"store_true",
1185
help=u"Run self-test")
1186
parser.add_option("--debug", action=u"store_true",
1187
help=u"Debug mode; run in foreground and log to"
1188
u" terminal")
1189
parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1190
u" priority string (see GnuTLS documentation)")
1191
parser.add_option("--servicename", type=u"string",
1192
metavar=u"NAME", help=u"Zeroconf service name")
1193
parser.add_option("--configdir", type=u"string",
1194
default=u"/etc/mandos", metavar=u"DIR",
1195
help=u"Directory to search for configuration"
1196
u" files")
1197
parser.add_option("--no-dbus", action=u"store_false",
1198
dest=u"use_dbus", help=u"Do not provide D-Bus"
1199
u" system bus interface")
1200
parser.add_option("--no-ipv6", action=u"store_false",
1201
dest=u"use_ipv6", help=u"Do not use IPv6")
1035
parser.add_option("-i", "--interface", type="string",
1036
metavar="IF", help="Bind to interface IF")
1037
parser.add_option("-a", "--address", type="string",
1038
help="Address to listen for requests on")
1039
parser.add_option("-p", "--port", type="int",
1040
help="Port number to receive requests on")
1041
parser.add_option("--check", action="store_true",
1042
help="Run self-test")
1043
parser.add_option("--debug", action="store_true",
1044
help="Debug mode; run in foreground and log to"
1045
" terminal")
1046
parser.add_option("--priority", type="string", help="GnuTLS"
1047
" priority string (see GnuTLS documentation)")
1048
parser.add_option("--servicename", type="string", metavar="NAME",
1049
help="Zeroconf service name")
1050
parser.add_option("--configdir", type="string",
1051
default="/etc/mandos", metavar="DIR",
1052
help="Directory to search for configuration"
1053
" files")
1054
parser.add_option("--no-dbus", action="store_false",
1055
dest="use_dbus",
1056
help="Do not provide D-Bus system bus"
1057
" interface")
1058
parser.add_option("--no-ipv6", action="store_false",
1059
dest="use_ipv6", help="Do not use IPv6")
1202
1060
options = parser.parse_args()[0]
1203
1061
1204
1062
if options.check:
1207
1065
sys.exit()
1208
1066
1209
1067
# Default values for config file for server-global settings
1210
server_defaults = { u"interface": u"",
1211
u"address": u"",
1212
u"port": u"",
1213
u"debug": u"False",
1214
u"priority":
1215
u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1216
u"servicename": u"Mandos",
1217
u"use_dbus": u"True",
1218
u"use_ipv6": u"True",
1068
server_defaults = { "interface": "",
1069
"address": "",
1070
"port": "",
1071
"debug": "False",
1072
"priority":
1073
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1074
"servicename": "Mandos",
1075
"use_dbus": "True",
1076
"use_ipv6": "True",
1219
1077
}
1220
1078
1221
1079
# Parse config file for server-global settings
1222
server_config = configparser.SafeConfigParser(server_defaults)
1080
server_config = ConfigParser.SafeConfigParser(server_defaults)
1223
1081
del server_defaults
1224
server_config.read(os.path.join(options.configdir,
1225
u"mandos.conf"))
1082
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1226
1083
# Convert the SafeConfigParser object to a dict
1227
1084
server_settings = server_config.defaults()
1228
1085
# Use the appropriate methods on the non-string config options
1229
for option in (u"debug", u"use_dbus", u"use_ipv6"):
1230
server_settings[option] = server_config.getboolean(u"DEFAULT",
1231
option)
1086
server_settings["debug"] = server_config.getboolean("DEFAULT",
1087
"debug")
1088
server_settings["use_dbus"] = server_config.getboolean("DEFAULT",
1089
"use_dbus")
1090
server_settings["use_ipv6"] = server_config.getboolean("DEFAULT",
1091
"use_ipv6")
1232
1092
if server_settings["port"]:
1233
server_settings["port"] = server_config.getint(u"DEFAULT",
1234
u"port")
1093
server_settings["port"] = server_config.getint("DEFAULT",
1094
"port")
1235
1095
del server_config
1236
1096
1237
1097
# Override the settings from the config file with command line
1238
1098
# options, if set.
1239
for option in (u"interface", u"address", u"port", u"debug",
1240
u"priority", u"servicename", u"configdir",
1241
u"use_dbus", u"use_ipv6"):
1099
for option in ("interface", "address", "port", "debug",
1100
"priority", "servicename", "configdir",
1101
"use_dbus", "use_ipv6"):
1242
1102
value = getattr(options, option)
1243
1103
if value is not None:
1244
1104
server_settings[option] = value
1245
1105
del options
1246
# Force all strings to be unicode
1247
for option in server_settings.keys():
1248
if type(server_settings[option]) is str:
1249
server_settings[option] = unicode(server_settings[option])
1250
1106
# Now we have our good server settings in "server_settings"
1251
1107
1252
1108
##################################################################
1253
1109
1254
1110
# For convenience
1255
debug = server_settings[u"debug"]
1256
use_dbus = server_settings[u"use_dbus"]
1257
use_ipv6 = server_settings[u"use_ipv6"]
1111
debug = server_settings["debug"]
1112
use_dbus = server_settings["use_dbus"]
1113
use_ipv6 = server_settings["use_ipv6"]
1258
1114
1259
1115
if not debug:
1260
1116
syslogger.setLevel(logging.WARNING)
1261
1117
console.setLevel(logging.WARNING)
1262
1118
1263
if server_settings[u"servicename"] != u"Mandos":
1119
if server_settings["servicename"] != "Mandos":
1264
1120
syslogger.setFormatter(logging.Formatter
1265
(u'Mandos (%s) [%%(process)d]:'
1266
u' %%(levelname)s: %%(message)s'
1267
% server_settings[u"servicename"]))
1121
('Mandos (%s) [%%(process)d]:'
1122
' %%(levelname)s: %%(message)s'
1123
% server_settings["servicename"]))
1268
1124
1269
1125
# Parse config file with clients
1270
client_defaults = { u"timeout": u"1h",
1271
u"interval": u"5m",
1272
u"checker": u"fping -q -- %%(host)s",
1273
u"host": u"",
1126
client_defaults = { "timeout": "1h",
1127
"interval": "5m",
1128
"checker": "fping -q -- %%(host)s",
1129
"host": "",
1274
1130
}
1275
client_config = configparser.SafeConfigParser(client_defaults)
1276
client_config.read(os.path.join(server_settings[u"configdir"],
1277
u"clients.conf"))
1278
1131
client_config = ConfigParser.SafeConfigParser(client_defaults)
1132
client_config.read(os.path.join(server_settings["configdir"],
1133
"clients.conf"))
1134
1279
1135
global mandos_dbus_service
1280
1136
mandos_dbus_service = None
1281
1137
1282
tcp_server = MandosServer((server_settings[u"address"],
1283
server_settings[u"port"]),
1284
ClientHandler,
1285
interface=server_settings[u"interface"],
1286
use_ipv6=use_ipv6,
1287
gnutls_priority=
1288
server_settings[u"priority"],
1289
use_dbus=use_dbus)
1290
pidfilename = u"/var/run/mandos.pid"
1138
clients = Set()
1139
tcp_server = IPv6_TCPServer((server_settings["address"],
1140
server_settings["port"]),
1141
TCP_handler,
1142
settings=server_settings,
1143
clients=clients, use_ipv6=use_ipv6)
1144
pidfilename = "/var/run/mandos.pid"
1291
1145
try:
1292
pidfile = open(pidfilename, u"w")
1146
pidfile = open(pidfilename, "w")
1293
1147
except IOError:
1294
logger.error(u"Could not open file %r", pidfilename)
1148
logger.error("Could not open file %r", pidfilename)
1295
1149
1296
1150
try:
1297
uid = pwd.getpwnam(u"_mandos").pw_uid
1298
gid = pwd.getpwnam(u"_mandos").pw_gid
1151
uid = pwd.getpwnam("_mandos").pw_uid
1152
gid = pwd.getpwnam("_mandos").pw_gid
1299
1153
except KeyError:
1300
1154
try:
1301
uid = pwd.getpwnam(u"mandos").pw_uid
1302
gid = pwd.getpwnam(u"mandos").pw_gid
1155
uid = pwd.getpwnam("mandos").pw_uid
1156
gid = pwd.getpwnam("mandos").pw_gid
1303
1157
except KeyError:
1304
1158
try:
1305
uid = pwd.getpwnam(u"nobody").pw_uid
1306
gid = pwd.getpwnam(u"nobody").pw_gid
1159
uid = pwd.getpwnam("nobody").pw_uid
1160
gid = pwd.getpwnam("nogroup").pw_gid
1307
1161
except KeyError:
1308
1162
uid = 65534
1309
1163
gid = 65534
1322
1176
1323
1177
@gnutls.library.types.gnutls_log_func
1324
1178
def debug_gnutls(level, string):
1325
logger.debug(u"GnuTLS: %s", string[:-1])
1179
logger.debug("GnuTLS: %s", string[:-1])
1326
1180
1327
1181
(gnutls.library.functions
1328
1182
.gnutls_global_set_log_function(debug_gnutls))
1329
1183
1184
global service
1185
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1186
service = AvahiService(name = server_settings["servicename"],
1187
servicetype = "_mandos._tcp",
1188
protocol = protocol)
1189
if server_settings["interface"]:
1190
service.interface = (if_nametoindex
1191
(server_settings["interface"]))
1192
1330
1193
global main_loop
1194
global bus
1195
global server
1331
1196
# From the Avahi example code
1332
1197
DBusGMainLoop(set_as_default=True )
1333
1198
main_loop = gobject.MainLoop()
1334
1199
bus = dbus.SystemBus()
1200
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
1201
avahi.DBUS_PATH_SERVER),
1202
avahi.DBUS_INTERFACE_SERVER)
1335
1203
# End of Avahi example code
1336
1204
if use_dbus:
1337
1205
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
1338
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1339
service = AvahiService(name = server_settings[u"servicename"],
1340
servicetype = u"_mandos._tcp",
1341
protocol = protocol, bus = bus)
1342
if server_settings["interface"]:
1343
service.interface = (if_nametoindex
1344
(str(server_settings[u"interface"])))
1345
1206
1346
client_class = Client
1347
if use_dbus:
1348
client_class = functools.partial(ClientDBus, bus = bus)
1349
tcp_server.clients.update(set(
1350
client_class(name = section,
1351
config= dict(client_config.items(section)))
1352
for section in client_config.sections()))
1353
if not tcp_server.clients:
1207
clients.update(Set(Client(name = section,
1208
config
1209
= dict(client_config.items(section)),
1210
use_dbus = use_dbus)
1211
for section in client_config.sections()))
1212
if not clients:
1354
1213
logger.warning(u"No clients defined")
1355
1214
1356
1215
if debug:
1380
1239
1381
1240
def cleanup():
1382
1241
"Cleanup function; run on exit"
1383
service.cleanup()
1242
global group
1243
# From the Avahi example code
1244
if not group is None:
1245
group.Free()
1246
group = None
1247
# End of Avahi example code
1384
1248
1385
while tcp_server.clients:
1386
client = tcp_server.clients.pop()
1249
while clients:
1250
client = clients.pop()
1387
1251
client.disable_hook = None
1388
1252
client.disable()
1389
1253
1398
1262
class MandosDBusService(dbus.service.Object):
1399
1263
"""A D-Bus proxy object"""
1400
1264
def __init__(self):
1401
dbus.service.Object.__init__(self, bus, u"/")
1265
dbus.service.Object.__init__(self, bus, "/")
1402
1266
_interface = u"se.bsnet.fukt.Mandos"
1403
1267
1404
@dbus.service.signal(_interface, signature=u"oa{sv}")
1268
@dbus.service.signal(_interface, signature="oa{sv}")
1405
1269
def ClientAdded(self, objpath, properties):
1406
1270
"D-Bus signal"
1407
1271
pass
1408
1272
1409
@dbus.service.signal(_interface, signature=u"s")
1273
@dbus.service.signal(_interface, signature="s")
1410
1274
def ClientNotFound(self, fingerprint):
1411
1275
"D-Bus signal"
1412
1276
pass
1413
1277
1414
@dbus.service.signal(_interface, signature=u"os")
1278
@dbus.service.signal(_interface, signature="os")
1415
1279
def ClientRemoved(self, objpath, name):
1416
1280
"D-Bus signal"
1417
1281
pass
1418
1282
1419
@dbus.service.method(_interface, out_signature=u"ao")
1283
@dbus.service.method(_interface, out_signature="ao")
1420
1284
def GetAllClients(self):
1421
1285
"D-Bus method"
1422
return dbus.Array(c.dbus_object_path
1423
for c in tcp_server.clients)
1286
return dbus.Array(c.dbus_object_path for c in clients)
1424
1287
1425
@dbus.service.method(_interface,
1426
out_signature=u"a{oa{sv}}")
1288
@dbus.service.method(_interface, out_signature="a{oa{sv}}")
1427
1289
def GetAllClientsWithProperties(self):
1428
1290
"D-Bus method"
1429
1291
return dbus.Dictionary(
1430
1292
((c.dbus_object_path, c.GetAllProperties())
1431
for c in tcp_server.clients),
1432
signature=u"oa{sv}")
1293
for c in clients),
1294
signature="oa{sv}")
1433
1295
1434
@dbus.service.method(_interface, in_signature=u"o")
1296
@dbus.service.method(_interface, in_signature="o")
1435
1297
def RemoveClient(self, object_path):
1436
1298
"D-Bus method"
1437
for c in tcp_server.clients:
1299
for c in clients:
1438
1300
if c.dbus_object_path == object_path:
1439
tcp_server.clients.remove(c)
1440
c.remove_from_connection()
1301
clients.remove(c)
1441
1302
# Don't signal anything except ClientRemoved
1442
c.disable(signal=False)
1303
c.use_dbus = False
1304
c.disable()
1443
1305
# Emit D-Bus signal
1444
1306
self.ClientRemoved(object_path, c.name)
1445
1307
return
1449
1311
1450
1312
mandos_dbus_service = MandosDBusService()
1451
1313
1452
for client in tcp_server.clients:
1314
for client in clients:
1453
1315
if use_dbus:
1454
1316
# Emit D-Bus signal
1455
1317
mandos_dbus_service.ClientAdded(client.dbus_object_path,
1473
1335
1474
1336
try:
1475
1337
# From the Avahi example code
1338
server.connect_to_signal("StateChanged", server_state_changed)
1476
1339
try:
1477
service.activate()
1340
server_state_changed(server.GetState())
1478
1341
except dbus.exceptions.DBusException, error:
1479
1342
logger.critical(u"DBusException: %s", error)
1480
1343
sys.exit(1)
1493
1356
except KeyboardInterrupt:
1494
1357
if debug:
1495
1358
print >> sys.stderr
1496
logger.debug(u"Server received KeyboardInterrupt")
1497
logger.debug(u"Server exiting")
1359
logger.debug("Server received KeyboardInterrupt")
1360
logger.debug("Server exiting")
1498
1361
1499
1362
if __name__ == '__main__':
1500
1363
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0