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- Committer: Teddy Hogeborn
- Date: 2015-07-20 00:18:59 UTC
- Revision ID: teddy@recompile.se-20150720001859-4373dkxokj7bt666
plugin-runner: Minor fix: close helperdir before exiting in fork.
* plugin-runner.c: Minor fix: close helperdir before exiting in fork
if helper program could not be opened.
* plugin-runner.c: Minor fix: close helperdir before exiting in fork
if helper program could not be opened.
- files added:
- debian/mandos-client.examples
- debian/upstream
- plugin-helpers
- files modified:
- .bzrignore
added
removed
mandos
1
#!/usr/bin/python
1
#!/usr/bin/python2.7
2
2
# -*- mode: python; coding: utf-8 -*-
3
3
#
4
4
# Mandos server - give out binary blobs to connecting clients.
11
11
# "AvahiService" class, and some lines in "main".
12
12
#
13
13
# Everything else is
14
# Copyright © 2008-2012 Teddy Hogeborn
15
# Copyright © 2008-2012 Björn Påhlsson
14
# Copyright © 2008-2015 Teddy Hogeborn
15
# Copyright © 2008-2015 Björn Påhlsson
16
16
#
17
17
# This program is free software: you can redistribute it and/or modify
18
18
# it under the terms of the GNU General Public License as published by
34
34
from __future__ import (division, absolute_import, print_function,
35
35
unicode_literals)
36
36
37
import SocketServer as socketserver
37
from future_builtins import *
38
39
try:
40
import SocketServer as socketserver
41
except ImportError:
42
import socketserver
38
43
import socket
39
44
import argparse
40
45
import datetime
45
50
import gnutls.library.functions
46
51
import gnutls.library.constants
47
52
import gnutls.library.types
48
import ConfigParser as configparser
53
try:
54
import ConfigParser as configparser
55
except ImportError:
56
import configparser
49
57
import sys
50
58
import re
51
59
import os
60
68
import struct
61
69
import fcntl
62
70
import functools
63
import cPickle as pickle
71
try:
72
import cPickle as pickle
73
except ImportError:
74
import pickle
64
75
import multiprocessing
65
76
import types
66
77
import binascii
67
78
import tempfile
79
import itertools
80
import collections
81
import codecs
68
82
69
83
import dbus
70
84
import dbus.service
71
import gobject
85
try:
86
import gobject
87
except ImportError:
88
from gi.repository import GObject as gobject
72
89
import avahi
73
90
from dbus.mainloop.glib import DBusGMainLoop
74
91
import ctypes
75
92
import ctypes.util
76
93
import xml.dom.minidom
77
94
import inspect
78
import GnuPGInterface
79
95
80
96
try:
81
97
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
85
101
except ImportError:
86
102
SO_BINDTODEVICE = None
87
103
88
version = "1.5.2"
104
if sys.version_info.major == 2:
105
str = unicode
106
107
version = "1.6.9"
89
108
stored_state_file = "clients.pickle"
90
109
91
110
logger = logging.getLogger()
92
syslogger = (logging.handlers.SysLogHandler
93
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
94
address = str("/dev/log")))
111
syslogger = None
95
112
96
113
try:
97
if_nametoindex = (ctypes.cdll.LoadLibrary
98
(ctypes.util.find_library("c"))
99
.if_nametoindex)
114
if_nametoindex = ctypes.cdll.LoadLibrary(
115
ctypes.util.find_library("c")).if_nametoindex
100
116
except (OSError, AttributeError):
117
101
118
def if_nametoindex(interface):
102
119
"Get an interface index the hard way, i.e. using fcntl()"
103
120
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
104
121
with contextlib.closing(socket.socket()) as s:
105
122
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
106
struct.pack(str("16s16x"),
107
interface))
108
interface_index = struct.unpack(str("I"),
109
ifreq[16:20])[0]
123
struct.pack(b"16s16x", interface))
124
interface_index = struct.unpack("I", ifreq[16:20])[0]
110
125
return interface_index
111
126
112
127
113
128
def initlogger(debug, level=logging.WARNING):
114
129
"""init logger and add loglevel"""
115
130
131
global syslogger
132
syslogger = (logging.handlers.SysLogHandler(
133
facility = logging.handlers.SysLogHandler.LOG_DAEMON,
134
address = "/dev/log"))
116
135
syslogger.setFormatter(logging.Formatter
117
136
('Mandos [%(process)d]: %(levelname)s:'
118
137
' %(message)s'))
135
154
136
155
class PGPEngine(object):
137
156
"""A simple class for OpenPGP symmetric encryption & decryption"""
157
138
158
def __init__(self):
139
self.gnupg = GnuPGInterface.GnuPG()
140
159
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
141
self.gnupg = GnuPGInterface.GnuPG()
142
self.gnupg.options.meta_interactive = False
143
self.gnupg.options.homedir = self.tempdir
144
self.gnupg.options.extra_args.extend(['--force-mdc',
145
'--quiet',
146
'--no-use-agent'])
160
self.gnupgargs = ['--batch',
161
'--home', self.tempdir,
162
'--force-mdc',
163
'--quiet',
164
'--no-use-agent']
147
165
148
166
def __enter__(self):
149
167
return self
150
168
151
def __exit__ (self, exc_type, exc_value, traceback):
169
def __exit__(self, exc_type, exc_value, traceback):
152
170
self._cleanup()
153
171
return False
154
172
171
189
def password_encode(self, password):
172
190
# Passphrase can not be empty and can not contain newlines or
173
191
# NUL bytes. So we prefix it and hex encode it.
174
return b"mandos" + binascii.hexlify(password)
192
encoded = b"mandos" + binascii.hexlify(password)
193
if len(encoded) > 2048:
194
# GnuPG can't handle long passwords, so encode differently
195
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
196
.replace(b"\n", b"\\n")
197
.replace(b"\0", b"\\x00"))
198
return encoded
175
199
176
200
def encrypt(self, data, password):
177
self.gnupg.passphrase = self.password_encode(password)
178
with open(os.devnull) as devnull:
179
try:
180
proc = self.gnupg.run(['--symmetric'],
181
create_fhs=['stdin', 'stdout'],
182
attach_fhs={'stderr': devnull})
183
with contextlib.closing(proc.handles['stdin']) as f:
184
f.write(data)
185
with contextlib.closing(proc.handles['stdout']) as f:
186
ciphertext = f.read()
187
proc.wait()
188
except IOError as e:
189
raise PGPError(e)
190
self.gnupg.passphrase = None
201
passphrase = self.password_encode(password)
202
with tempfile.NamedTemporaryFile(
203
dir=self.tempdir) as passfile:
204
passfile.write(passphrase)
205
passfile.flush()
206
proc = subprocess.Popen(['gpg', '--symmetric',
207
'--passphrase-file',
208
passfile.name]
209
+ self.gnupgargs,
210
stdin = subprocess.PIPE,
211
stdout = subprocess.PIPE,
212
stderr = subprocess.PIPE)
213
ciphertext, err = proc.communicate(input = data)
214
if proc.returncode != 0:
215
raise PGPError(err)
191
216
return ciphertext
192
217
193
218
def decrypt(self, data, password):
194
self.gnupg.passphrase = self.password_encode(password)
195
with open(os.devnull) as devnull:
196
try:
197
proc = self.gnupg.run(['--decrypt'],
198
create_fhs=['stdin', 'stdout'],
199
attach_fhs={'stderr': devnull})
200
with contextlib.closing(proc.handles['stdin'] ) as f:
201
f.write(data)
202
with contextlib.closing(proc.handles['stdout']) as f:
203
decrypted_plaintext = f.read()
204
proc.wait()
205
except IOError as e:
206
raise PGPError(e)
207
self.gnupg.passphrase = None
219
passphrase = self.password_encode(password)
220
with tempfile.NamedTemporaryFile(
221
dir = self.tempdir) as passfile:
222
passfile.write(passphrase)
223
passfile.flush()
224
proc = subprocess.Popen(['gpg', '--decrypt',
225
'--passphrase-file',
226
passfile.name]
227
+ self.gnupgargs,
228
stdin = subprocess.PIPE,
229
stdout = subprocess.PIPE,
230
stderr = subprocess.PIPE)
231
decrypted_plaintext, err = proc.communicate(input = data)
232
if proc.returncode != 0:
233
raise PGPError(err)
208
234
return decrypted_plaintext
209
235
210
236
211
212
237
class AvahiError(Exception):
213
238
def __init__(self, value, *args, **kwargs):
214
239
self.value = value
215
super(AvahiError, self).__init__(value, *args, **kwargs)
216
def __unicode__(self):
217
return unicode(repr(self.value))
240
return super(AvahiError, self).__init__(value, *args,
241
**kwargs)
242
218
243
219
244
class AvahiServiceError(AvahiError):
220
245
pass
221
246
247
222
248
class AvahiGroupError(AvahiError):
223
249
pass
224
250
231
257
Used to optionally bind to the specified interface.
232
258
name: string; Example: 'Mandos'
233
259
type: string; Example: '_mandos._tcp'.
234
See <http://www.dns-sd.org/ServiceTypes.html>
260
See <https://www.iana.org/assignments/service-names-port-numbers>
235
261
port: integer; what port to announce
236
262
TXT: list of strings; TXT record for the service
237
263
domain: string; Domain to publish on, default to .local if empty.
243
269
server: D-Bus Server
244
270
bus: dbus.SystemBus()
245
271
"""
246
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
247
servicetype = None, port = None, TXT = None,
248
domain = "", host = "", max_renames = 32768,
249
protocol = avahi.PROTO_UNSPEC, bus = None):
272
273
def __init__(self,
274
interface = avahi.IF_UNSPEC,
275
name = None,
276
servicetype = None,
277
port = None,
278
TXT = None,
279
domain = "",
280
host = "",
281
max_renames = 32768,
282
protocol = avahi.PROTO_UNSPEC,
283
bus = None):
250
284
self.interface = interface
251
285
self.name = name
252
286
self.type = servicetype
261
295
self.server = None
262
296
self.bus = bus
263
297
self.entry_group_state_changed_match = None
264
def rename(self):
298
299
def rename(self, remove=True):
265
300
"""Derived from the Avahi example code"""
266
301
if self.rename_count >= self.max_renames:
267
302
logger.critical("No suitable Zeroconf service name found"
268
303
" after %i retries, exiting.",
269
304
self.rename_count)
270
305
raise AvahiServiceError("Too many renames")
271
self.name = unicode(self.server
272
.GetAlternativeServiceName(self.name))
306
self.name = str(
307
self.server.GetAlternativeServiceName(self.name))
308
self.rename_count += 1
273
309
logger.info("Changing Zeroconf service name to %r ...",
274
310
self.name)
275
self.remove()
311
if remove:
312
self.remove()
276
313
try:
277
314
self.add()
278
315
except dbus.exceptions.DBusException as error:
279
logger.critical("DBusException: %s", error)
280
self.cleanup()
281
os._exit(1)
282
self.rename_count += 1
316
if (error.get_dbus_name()
317
== "org.freedesktop.Avahi.CollisionError"):
318
logger.info("Local Zeroconf service name collision.")
319
return self.rename(remove=False)
320
else:
321
logger.critical("D-Bus Exception", exc_info=error)
322
self.cleanup()
323
os._exit(1)
324
283
325
def remove(self):
284
326
"""Derived from the Avahi example code"""
285
327
if self.entry_group_state_changed_match is not None:
287
329
self.entry_group_state_changed_match = None
288
330
if self.group is not None:
289
331
self.group.Reset()
332
290
333
def add(self):
291
334
"""Derived from the Avahi example code"""
292
335
self.remove()
309
352
dbus.UInt16(self.port),
310
353
avahi.string_array_to_txt_array(self.TXT))
311
354
self.group.Commit()
355
312
356
def entry_group_state_changed(self, state, error):
313
357
"""Derived from the Avahi example code"""
314
358
logger.debug("Avahi entry group state change: %i", state)
320
364
self.rename()
321
365
elif state == avahi.ENTRY_GROUP_FAILURE:
322
366
logger.critical("Avahi: Error in group state changed %s",
323
unicode(error))
324
raise AvahiGroupError("State changed: %s"
325
% unicode(error))
367
str(error))
368
raise AvahiGroupError("State changed: {!s}".format(error))
369
326
370
def cleanup(self):
327
371
"""Derived from the Avahi example code"""
328
372
if self.group is not None:
333
377
pass
334
378
self.group = None
335
379
self.remove()
380
336
381
def server_state_changed(self, state, error=None):
337
382
"""Derived from the Avahi example code"""
338
383
logger.debug("Avahi server state change: %i", state)
339
bad_states = { avahi.SERVER_INVALID:
340
"Zeroconf server invalid",
341
avahi.SERVER_REGISTERING: None,
342
avahi.SERVER_COLLISION:
343
"Zeroconf server name collision",
344
avahi.SERVER_FAILURE:
345
"Zeroconf server failure" }
384
bad_states = {
385
avahi.SERVER_INVALID: "Zeroconf server invalid",
386
avahi.SERVER_REGISTERING: None,
387
avahi.SERVER_COLLISION: "Zeroconf server name collision",
388
avahi.SERVER_FAILURE: "Zeroconf server failure",
389
}
346
390
if state in bad_states:
347
391
if bad_states[state] is not None:
348
392
if error is None:
351
395
logger.error(bad_states[state] + ": %r", error)
352
396
self.cleanup()
353
397
elif state == avahi.SERVER_RUNNING:
354
self.add()
398
try:
399
self.add()
400
except dbus.exceptions.DBusException as error:
401
if (error.get_dbus_name()
402
== "org.freedesktop.Avahi.CollisionError"):
403
logger.info("Local Zeroconf service name"
404
" collision.")
405
return self.rename(remove=False)
406
else:
407
logger.critical("D-Bus Exception", exc_info=error)
408
self.cleanup()
409
os._exit(1)
355
410
else:
356
411
if error is None:
357
412
logger.debug("Unknown state: %r", state)
358
413
else:
359
414
logger.debug("Unknown state: %r: %r", state, error)
415
360
416
def activate(self):
361
417
"""Derived from the Avahi example code"""
362
418
if self.server is None:
366
422
follow_name_owner_changes=True),
367
423
avahi.DBUS_INTERFACE_SERVER)
368
424
self.server.connect_to_signal("StateChanged",
369
self.server_state_changed)
425
self.server_state_changed)
370
426
self.server_state_changed(self.server.GetState())
371
427
428
372
429
class AvahiServiceToSyslog(AvahiService):
373
def rename(self):
430
def rename(self, *args, **kwargs):
374
431
"""Add the new name to the syslog messages"""
375
ret = AvahiService.rename(self)
376
syslogger.setFormatter(logging.Formatter
377
('Mandos (%s) [%%(process)d]:'
378
' %%(levelname)s: %%(message)s'
379
% self.name))
432
ret = AvahiService.rename(self, *args, **kwargs)
433
syslogger.setFormatter(logging.Formatter(
434
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
435
.format(self.name)))
380
436
return ret
381
437
382
def timedelta_to_milliseconds(td):
383
"Convert a datetime.timedelta() to milliseconds"
384
return ((td.days * 24 * 60 * 60 * 1000)
385
+ (td.seconds * 1000)
386
+ (td.microseconds // 1000))
387
438
def call_pipe(connection, # : multiprocessing.Connection
439
func, *args, **kwargs):
440
"""This function is meant to be called by multiprocessing.Process
441
442
This function runs func(*args, **kwargs), and writes the resulting
443
return value on the provided multiprocessing.Connection.
444
"""
445
connection.send(func(*args, **kwargs))
446
connection.close()
447
388
448
class Client(object):
389
449
"""A representation of a client host served by this server.
390
450
416
476
last_checker_status: integer between 0 and 255 reflecting exit
417
477
status of last checker. -1 reflects crashed
418
478
checker, -2 means no checker completed yet.
479
last_checker_signal: The signal which killed the last checker, if
480
last_checker_status is -1
419
481
last_enabled: datetime.datetime(); (UTC) or None
420
482
name: string; from the config file, used in log messages and
421
483
D-Bus identifiers
426
488
runtime_expansions: Allowed attributes for runtime expansion.
427
489
expires: datetime.datetime(); time (UTC) when a client will be
428
490
disabled, or None
491
server_settings: The server_settings dict from main()
429
492
"""
430
493
431
494
runtime_expansions = ("approval_delay", "approval_duration",
432
"created", "enabled", "fingerprint",
433
"host", "interval", "last_checked_ok",
495
"created", "enabled", "expires",
496
"fingerprint", "host", "interval",
497
"last_approval_request", "last_checked_ok",
434
498
"last_enabled", "name", "timeout")
435
client_defaults = { "timeout": "5m",
436
"extended_timeout": "15m",
437
"interval": "2m",
438
"checker": "fping -q -- %%(host)s",
439
"host": "",
440
"approval_delay": "0s",
441
"approval_duration": "1s",
442
"approved_by_default": "True",
443
"enabled": "True",
444
}
445
446
def timeout_milliseconds(self):
447
"Return the 'timeout' attribute in milliseconds"
448
return timedelta_to_milliseconds(self.timeout)
449
450
def extended_timeout_milliseconds(self):
451
"Return the 'extended_timeout' attribute in milliseconds"
452
return timedelta_to_milliseconds(self.extended_timeout)
453
454
def interval_milliseconds(self):
455
"Return the 'interval' attribute in milliseconds"
456
return timedelta_to_milliseconds(self.interval)
457
458
def approval_delay_milliseconds(self):
459
return timedelta_to_milliseconds(self.approval_delay)
460
499
client_defaults = {
500
"timeout": "PT5M",
501
"extended_timeout": "PT15M",
502
"interval": "PT2M",
503
"checker": "fping -q -- %%(host)s",
504
"host": "",
505
"approval_delay": "PT0S",
506
"approval_duration": "PT1S",
507
"approved_by_default": "True",
508
"enabled": "True",
509
}
510
461
511
@staticmethod
462
512
def config_parser(config):
463
513
"""Construct a new dict of client settings of this form:
478
528
client["enabled"] = config.getboolean(client_name,
479
529
"enabled")
480
530
531
# Uppercase and remove spaces from fingerprint for later
532
# comparison purposes with return value from the
533
# fingerprint() function
481
534
client["fingerprint"] = (section["fingerprint"].upper()
482
535
.replace(" ", ""))
483
536
if "secret" in section:
488
541
"rb") as secfile:
489
542
client["secret"] = secfile.read()
490
543
else:
491
raise TypeError("No secret or secfile for section %s"
492
% section)
544
raise TypeError("No secret or secfile for section {}"
545
.format(section))
493
546
client["timeout"] = string_to_delta(section["timeout"])
494
547
client["extended_timeout"] = string_to_delta(
495
548
section["extended_timeout"])
504
557
client["last_checker_status"] = -2
505
558
506
559
return settings
507
508
509
def __init__(self, settings, name = None):
510
"""Note: the 'checker' key in 'config' sets the
511
'checker_command' attribute and *not* the 'checker'
512
attribute."""
560
561
def __init__(self, settings, name = None, server_settings=None):
513
562
self.name = name
563
if server_settings is None:
564
server_settings = {}
565
self.server_settings = server_settings
514
566
# adding all client settings
515
for setting, value in settings.iteritems():
567
for setting, value in settings.items():
516
568
setattr(self, setting, value)
517
569
518
570
if self.enabled:
524
576
else:
525
577
self.last_enabled = None
526
578
self.expires = None
527
579
528
580
logger.debug("Creating client %r", self.name)
529
# Uppercase and remove spaces from fingerprint for later
530
# comparison purposes with return value from the fingerprint()
531
# function
532
581
logger.debug(" Fingerprint: %s", self.fingerprint)
533
582
self.created = settings.get("created",
534
583
datetime.datetime.utcnow())
535
584
536
585
# attributes specific for this server instance
537
586
self.checker = None
538
587
self.checker_initiator_tag = None
541
590
self.current_checker_command = None
542
591
self.approved = None
543
592
self.approvals_pending = 0
544
self.changedstate = (multiprocessing_manager
545
.Condition(multiprocessing_manager
546
.Lock()))
547
self.client_structure = [attr for attr in
548
self.__dict__.iterkeys()
593
self.changedstate = multiprocessing_manager.Condition(
594
multiprocessing_manager.Lock())
595
self.client_structure = [attr
596
for attr in self.__dict__.iterkeys()
549
597
if not attr.startswith("_")]
550
598
self.client_structure.append("client_structure")
551
599
552
for name, t in inspect.getmembers(type(self),
553
lambda obj:
554
isinstance(obj,
555
property)):
600
for name, t in inspect.getmembers(
601
type(self), lambda obj: isinstance(obj, property)):
556
602
if not name.startswith("_"):
557
603
self.client_structure.append(name)
558
604
566
612
if getattr(self, "enabled", False):
567
613
# Already enabled
568
614
return
569
self.send_changedstate()
570
615
self.expires = datetime.datetime.utcnow() + self.timeout
571
616
self.enabled = True
572
617
self.last_enabled = datetime.datetime.utcnow()
573
618
self.init_checker()
619
self.send_changedstate()
574
620
575
621
def disable(self, quiet=True):
576
622
"""Disable this client."""
577
623
if not getattr(self, "enabled", False):
578
624
return False
579
625
if not quiet:
580
self.send_changedstate()
581
if not quiet:
582
626
logger.info("Disabling client %s", self.name)
583
if getattr(self, "disable_initiator_tag", False):
627
if getattr(self, "disable_initiator_tag", None) is not None:
584
628
gobject.source_remove(self.disable_initiator_tag)
585
629
self.disable_initiator_tag = None
586
630
self.expires = None
587
if getattr(self, "checker_initiator_tag", False):
631
if getattr(self, "checker_initiator_tag", None) is not None:
588
632
gobject.source_remove(self.checker_initiator_tag)
589
633
self.checker_initiator_tag = None
590
634
self.stop_checker()
591
635
self.enabled = False
636
if not quiet:
637
self.send_changedstate()
592
638
# Do not run this again if called by a gobject.timeout_add
593
639
return False
594
640
598
644
def init_checker(self):
599
645
# Schedule a new checker to be started an 'interval' from now,
600
646
# and every interval from then on.
601
self.checker_initiator_tag = (gobject.timeout_add
602
(self.interval_milliseconds(),
603
self.start_checker))
647
if self.checker_initiator_tag is not None:
648
gobject.source_remove(self.checker_initiator_tag)
649
self.checker_initiator_tag = gobject.timeout_add(
650
int(self.interval.total_seconds() * 1000),
651
self.start_checker)
604
652
# Schedule a disable() when 'timeout' has passed
605
self.disable_initiator_tag = (gobject.timeout_add
606
(self.timeout_milliseconds(),
607
self.disable))
653
if self.disable_initiator_tag is not None:
654
gobject.source_remove(self.disable_initiator_tag)
655
self.disable_initiator_tag = gobject.timeout_add(
656
int(self.timeout.total_seconds() * 1000), self.disable)
608
657
# Also start a new checker *right now*.
609
658
self.start_checker()
610
659
611
def checker_callback(self, pid, condition, command):
660
def checker_callback(self, source, condition, connection,
661
command):
612
662
"""The checker has completed, so take appropriate actions."""
613
663
self.checker_callback_tag = None
614
664
self.checker = None
615
if os.WIFEXITED(condition):
616
self.last_checker_status = os.WEXITSTATUS(condition)
665
# Read return code from connection (see call_pipe)
666
returncode = connection.recv()
667
connection.close()
668
669
if returncode >= 0:
670
self.last_checker_status = returncode
671
self.last_checker_signal = None
617
672
if self.last_checker_status == 0:
618
673
logger.info("Checker for %(name)s succeeded",
619
674
vars(self))
620
675
self.checked_ok()
621
676
else:
622
logger.info("Checker for %(name)s failed",
623
vars(self))
677
logger.info("Checker for %(name)s failed", vars(self))
624
678
else:
625
679
self.last_checker_status = -1
680
self.last_checker_signal = -returncode
626
681
logger.warning("Checker for %(name)s crashed?",
627
682
vars(self))
683
return False
628
684
629
685
def checked_ok(self):
630
686
"""Assert that the client has been seen, alive and well."""
631
687
self.last_checked_ok = datetime.datetime.utcnow()
632
688
self.last_checker_status = 0
689
self.last_checker_signal = None
633
690
self.bump_timeout()
634
691
635
692
def bump_timeout(self, timeout=None):
638
695
timeout = self.timeout
639
696
if self.disable_initiator_tag is not None:
640
697
gobject.source_remove(self.disable_initiator_tag)
698
self.disable_initiator_tag = None
641
699
if getattr(self, "enabled", False):
642
self.disable_initiator_tag = (gobject.timeout_add
643
(timedelta_to_milliseconds
644
(timeout), self.disable))
700
self.disable_initiator_tag = gobject.timeout_add(
701
int(timeout.total_seconds() * 1000), self.disable)
645
702
self.expires = datetime.datetime.utcnow() + timeout
646
703
647
704
def need_approval(self):
653
710
If a checker already exists, leave it running and do
654
711
nothing."""
655
712
# The reason for not killing a running checker is that if we
656
# did that, then if a checker (for some reason) started
657
# running slowly and taking more than 'interval' time, the
658
# client would inevitably timeout, since no checker would get
659
# a chance to run to completion. If we instead leave running
713
# did that, and if a checker (for some reason) started running
714
# slowly and taking more than 'interval' time, then the client
715
# would inevitably timeout, since no checker would get a
716
# chance to run to completion. If we instead leave running
660
717
# checkers alone, the checker would have to take more time
661
718
# than 'timeout' for the client to be disabled, which is as it
662
719
# should be.
663
720
664
# If a checker exists, make sure it is not a zombie
665
try:
666
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
667
except (AttributeError, OSError) as error:
668
if (isinstance(error, OSError)
669
and error.errno != errno.ECHILD):
670
raise error
671
else:
672
if pid:
673
logger.warning("Checker was a zombie")
674
gobject.source_remove(self.checker_callback_tag)
675
self.checker_callback(pid, status,
676
self.current_checker_command)
721
if self.checker is not None and not self.checker.is_alive():
722
logger.warning("Checker was not alive; joining")
723
self.checker.join()
724
self.checker = None
677
725
# Start a new checker if needed
678
726
if self.checker is None:
727
# Escape attributes for the shell
728
escaped_attrs = {
729
attr: re.escape(str(getattr(self, attr)))
730
for attr in self.runtime_expansions }
679
731
try:
680
# In case checker_command has exactly one % operator
681
command = self.checker_command % self.host
682
except TypeError:
683
# Escape attributes for the shell
684
escaped_attrs = dict(
685
(attr,
686
re.escape(unicode(str(getattr(self, attr, "")),
687
errors=
688
'replace')))
689
for attr in
690
self.runtime_expansions)
691
692
try:
693
command = self.checker_command % escaped_attrs
694
except TypeError as error:
695
logger.error('Could not format string "%s":'
696
' %s', self.checker_command, error)
697
return True # Try again later
732
command = self.checker_command % escaped_attrs
733
except TypeError as error:
734
logger.error('Could not format string "%s"',
735
self.checker_command,
736
exc_info=error)
737
return True # Try again later
698
738
self.current_checker_command = command
699
try:
700
logger.info("Starting checker %r for %s",
701
command, self.name)
702
# We don't need to redirect stdout and stderr, since
703
# in normal mode, that is already done by daemon(),
704
# and in debug mode we don't want to. (Stdin is
705
# always replaced by /dev/null.)
706
self.checker = subprocess.Popen(command,
707
close_fds=True,
708
shell=True, cwd="/")
709
self.checker_callback_tag = (gobject.child_watch_add
710
(self.checker.pid,
711
self.checker_callback,
712
data=command))
713
# The checker may have completed before the gobject
714
# watch was added. Check for this.
715
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
716
if pid:
717
gobject.source_remove(self.checker_callback_tag)
718
self.checker_callback(pid, status, command)
719
except OSError as error:
720
logger.error("Failed to start subprocess: %s",
721
error)
739
logger.info("Starting checker %r for %s", command,
740
self.name)
741
# We don't need to redirect stdout and stderr, since
742
# in normal mode, that is already done by daemon(),
743
# and in debug mode we don't want to. (Stdin is
744
# always replaced by /dev/null.)
745
# The exception is when not debugging but nevertheless
746
# running in the foreground; use the previously
747
# created wnull.
748
popen_args = { "close_fds": True,
749
"shell": True,
750
"cwd": "/" }
751
if (not self.server_settings["debug"]
752
and self.server_settings["foreground"]):
753
popen_args.update({"stdout": wnull,
754
"stderr": wnull })
755
pipe = multiprocessing.Pipe(duplex = False)
756
self.checker = multiprocessing.Process(
757
target = call_pipe,
758
args = (pipe[1], subprocess.call, command),
759
kwargs = popen_args)
760
self.checker.start()
761
self.checker_callback_tag = gobject.io_add_watch(
762
pipe[0].fileno(), gobject.IO_IN,
763
self.checker_callback, pipe[0], command)
722
764
# Re-run this periodically if run by gobject.timeout_add
723
765
return True
724
766
730
772
if getattr(self, "checker", None) is None:
731
773
return
732
774
logger.debug("Stopping checker for %(name)s", vars(self))
733
try:
734
os.kill(self.checker.pid, signal.SIGTERM)
735
#time.sleep(0.5)
736
#if self.checker.poll() is None:
737
# os.kill(self.checker.pid, signal.SIGKILL)
738
except OSError as error:
739
if error.errno != errno.ESRCH: # No such process
740
raise
775
self.checker.terminate()
741
776
self.checker = None
742
777
743
778
744
def dbus_service_property(dbus_interface, signature="v",
745
access="readwrite", byte_arrays=False):
779
def dbus_service_property(dbus_interface,
780
signature="v",
781
access="readwrite",
782
byte_arrays=False):
746
783
"""Decorators for marking methods of a DBusObjectWithProperties to
747
784
become properties on the D-Bus.
748
785
757
794
# "Set" method, so we fail early here:
758
795
if byte_arrays and signature != "ay":
759
796
raise ValueError("Byte arrays not supported for non-'ay'"
760
" signature %r" % signature)
797
" signature {!r}".format(signature))
798
761
799
def decorator(func):
762
800
func._dbus_is_property = True
763
801
func._dbus_interface = dbus_interface
768
806
func._dbus_name = func._dbus_name[:-14]
769
807
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
770
808
return func
809
810
return decorator
811
812
813
def dbus_interface_annotations(dbus_interface):
814
"""Decorator for marking functions returning interface annotations
815
816
Usage:
817
818
@dbus_interface_annotations("org.example.Interface")
819
def _foo(self): # Function name does not matter
820
return {"org.freedesktop.DBus.Deprecated": "true",
821
"org.freedesktop.DBus.Property.EmitsChangedSignal":
822
"false"}
823
"""
824
825
def decorator(func):
826
func._dbus_is_interface = True
827
func._dbus_interface = dbus_interface
828
func._dbus_name = dbus_interface
829
return func
830
831
return decorator
832
833
834
def dbus_annotations(annotations):
835
"""Decorator to annotate D-Bus methods, signals or properties
836
Usage:
837
838
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
839
"org.freedesktop.DBus.Property."
840
"EmitsChangedSignal": "false"})
841
@dbus_service_property("org.example.Interface", signature="b",
842
access="r")
843
def Property_dbus_property(self):
844
return dbus.Boolean(False)
845
"""
846
847
def decorator(func):
848
func._dbus_annotations = annotations
849
return func
850
771
851
return decorator
772
852
773
853
774
854
class DBusPropertyException(dbus.exceptions.DBusException):
775
855
"""A base class for D-Bus property-related exceptions
776
856
"""
777
def __unicode__(self):
778
return unicode(str(self))
857
pass
779
858
780
859
781
860
class DBusPropertyAccessException(DBusPropertyException):
799
878
"""
800
879
801
880
@staticmethod
802
def _is_dbus_property(obj):
803
return getattr(obj, "_dbus_is_property", False)
881
def _is_dbus_thing(thing):
882
"""Returns a function testing if an attribute is a D-Bus thing
883
884
If called like _is_dbus_thing("method") it returns a function
885
suitable for use as predicate to inspect.getmembers().
886
"""
887
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
888
False)
804
889
805
def _get_all_dbus_properties(self):
890
def _get_all_dbus_things(self, thing):
806
891
"""Returns a generator of (name, attribute) pairs
807
892
"""
808
return ((prop.__get__(self)._dbus_name, prop.__get__(self))
893
return ((getattr(athing.__get__(self), "_dbus_name", name),
894
athing.__get__(self))
809
895
for cls in self.__class__.__mro__
810
for name, prop in
811
inspect.getmembers(cls, self._is_dbus_property))
896
for name, athing in
897
inspect.getmembers(cls, self._is_dbus_thing(thing)))
812
898
813
899
def _get_dbus_property(self, interface_name, property_name):
814
900
"""Returns a bound method if one exists which is a D-Bus
815
901
property with the specified name and interface.
816
902
"""
817
for cls in self.__class__.__mro__:
818
for name, value in (inspect.getmembers
819
(cls, self._is_dbus_property)):
903
for cls in self.__class__.__mro__:
904
for name, value in inspect.getmembers(
905
cls, self._is_dbus_thing("property")):
820
906
if (value._dbus_name == property_name
821
907
and value._dbus_interface == interface_name):
822
908
return value.__get__(self)
823
909
824
910
# No such property
825
raise DBusPropertyNotFound(self.dbus_object_path + ":"
826
+ interface_name + "."
827
+ property_name)
911
raise DBusPropertyNotFound("{}:{}.{}".format(
912
self.dbus_object_path, interface_name, property_name))
828
913
829
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
914
@dbus.service.method(dbus.PROPERTIES_IFACE,
915
in_signature="ss",
830
916
out_signature="v")
831
917
def Get(self, interface_name, property_name):
832
918
"""Standard D-Bus property Get() method, see D-Bus standard.
850
936
# The byte_arrays option is not supported yet on
851
937
# signatures other than "ay".
852
938
if prop._dbus_signature != "ay":
853
raise ValueError
939
raise ValueError("Byte arrays not supported for non-"
940
"'ay' signature {!r}"
941
.format(prop._dbus_signature))
854
942
value = dbus.ByteArray(b''.join(chr(byte)
855
943
for byte in value))
856
944
prop(value)
857
945
858
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
946
@dbus.service.method(dbus.PROPERTIES_IFACE,
947
in_signature="s",
859
948
out_signature="a{sv}")
860
949
def GetAll(self, interface_name):
861
950
"""Standard D-Bus property GetAll() method, see D-Bus
864
953
Note: Will not include properties with access="write".
865
954
"""
866
955
properties = {}
867
for name, prop in self._get_all_dbus_properties():
956
for name, prop in self._get_all_dbus_things("property"):
868
957
if (interface_name
869
958
and interface_name != prop._dbus_interface):
870
959
# Interface non-empty but did not match
876
965
if not hasattr(value, "variant_level"):
877
966
properties[name] = value
878
967
continue
879
properties[name] = type(value)(value, variant_level=
880
value.variant_level+1)
968
properties[name] = type(value)(
969
value, variant_level = value.variant_level + 1)
881
970
return dbus.Dictionary(properties, signature="sv")
882
971
972
@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
973
def PropertiesChanged(self, interface_name, changed_properties,
974
invalidated_properties):
975
"""Standard D-Bus PropertiesChanged() signal, see D-Bus
976
standard.
977
"""
978
pass
979
883
980
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
884
981
out_signature="s",
885
982
path_keyword='object_path',
886
983
connection_keyword='connection')
887
984
def Introspect(self, object_path, connection):
888
"""Standard D-Bus method, overloaded to insert property tags.
985
"""Overloading of standard D-Bus method.
986
987
Inserts property tags and interface annotation tags.
889
988
"""
890
989
xmlstring = dbus.service.Object.Introspect(self, object_path,
891
990
connection)
892
991
try:
893
992
document = xml.dom.minidom.parseString(xmlstring)
993
894
994
def make_tag(document, name, prop):
895
995
e = document.createElement("property")
896
996
e.setAttribute("name", name)
897
997
e.setAttribute("type", prop._dbus_signature)
898
998
e.setAttribute("access", prop._dbus_access)
899
999
return e
1000
900
1001
for if_tag in document.getElementsByTagName("interface"):
1002
# Add property tags
901
1003
for tag in (make_tag(document, name, prop)
902
1004
for name, prop
903
in self._get_all_dbus_properties()
1005
in self._get_all_dbus_things("property")
904
1006
if prop._dbus_interface
905
1007
== if_tag.getAttribute("name")):
906
1008
if_tag.appendChild(tag)
1009
# Add annotation tags
1010
for typ in ("method", "signal", "property"):
1011
for tag in if_tag.getElementsByTagName(typ):
1012
annots = dict()
1013
for name, prop in (self.
1014
_get_all_dbus_things(typ)):
1015
if (name == tag.getAttribute("name")
1016
and prop._dbus_interface
1017
== if_tag.getAttribute("name")):
1018
annots.update(getattr(
1019
prop, "_dbus_annotations", {}))
1020
for name, value in annots.items():
1021
ann_tag = document.createElement(
1022
"annotation")
1023
ann_tag.setAttribute("name", name)
1024
ann_tag.setAttribute("value", value)
1025
tag.appendChild(ann_tag)
1026
# Add interface annotation tags
1027
for annotation, value in dict(
1028
itertools.chain.from_iterable(
1029
annotations().items()
1030
for name, annotations
1031
in self._get_all_dbus_things("interface")
1032
if name == if_tag.getAttribute("name")
1033
)).items():
1034
ann_tag = document.createElement("annotation")
1035
ann_tag.setAttribute("name", annotation)
1036
ann_tag.setAttribute("value", value)
1037
if_tag.appendChild(ann_tag)
907
1038
# Add the names to the return values for the
908
1039
# "org.freedesktop.DBus.Properties" methods
909
1040
if (if_tag.getAttribute("name")
924
1055
except (AttributeError, xml.dom.DOMException,
925
1056
xml.parsers.expat.ExpatError) as error:
926
1057
logger.error("Failed to override Introspection method",
927
error)
1058
exc_info=error)
928
1059
return xmlstring
929
1060
930
1061
931
def datetime_to_dbus (dt, variant_level=0):
1062
def datetime_to_dbus(dt, variant_level=0):
932
1063
"""Convert a UTC datetime.datetime() to a D-Bus type."""
933
1064
if dt is None:
934
1065
return dbus.String("", variant_level = variant_level)
935
return dbus.String(dt.isoformat(),
936
variant_level=variant_level)
937
938
939
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
940
.__metaclass__):
941
"""Applied to an empty subclass of a D-Bus object, this metaclass
942
will add additional D-Bus attributes matching a certain pattern.
1066
return dbus.String(dt.isoformat(), variant_level=variant_level)
1067
1068
1069
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1070
"""A class decorator; applied to a subclass of
1071
dbus.service.Object, it will add alternate D-Bus attributes with
1072
interface names according to the "alt_interface_names" mapping.
1073
Usage:
1074
1075
@alternate_dbus_interfaces({"org.example.Interface":
1076
"net.example.AlternateInterface"})
1077
class SampleDBusObject(dbus.service.Object):
1078
@dbus.service.method("org.example.Interface")
1079
def SampleDBusMethod():
1080
pass
1081
1082
The above "SampleDBusMethod" on "SampleDBusObject" will be
1083
reachable via two interfaces: "org.example.Interface" and
1084
"net.example.AlternateInterface", the latter of which will have
1085
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1086
"true", unless "deprecate" is passed with a False value.
1087
1088
This works for methods and signals, and also for D-Bus properties
1089
(from DBusObjectWithProperties) and interfaces (from the
1090
dbus_interface_annotations decorator).
943
1091
"""
944
def __new__(mcs, name, bases, attr):
945
# Go through all the base classes which could have D-Bus
946
# methods, signals, or properties in them
947
for base in (b for b in bases
948
if issubclass(b, dbus.service.Object)):
949
# Go though all attributes of the base class
950
for attrname, attribute in inspect.getmembers(base):
1092
1093
def wrapper(cls):
1094
for orig_interface_name, alt_interface_name in (
1095
alt_interface_names.items()):
1096
attr = {}
1097
interface_names = set()
1098
# Go though all attributes of the class
1099
for attrname, attribute in inspect.getmembers(cls):
951
1100
# Ignore non-D-Bus attributes, and D-Bus attributes
952
1101
# with the wrong interface name
953
1102
if (not hasattr(attribute, "_dbus_interface")
954
or not attribute._dbus_interface
955
.startswith("se.recompile.Mandos")):
1103
or not attribute._dbus_interface.startswith(
1104
orig_interface_name)):
956
1105
continue
957
1106
# Create an alternate D-Bus interface name based on
958
1107
# the current name
959
alt_interface = (attribute._dbus_interface
960
.replace("se.recompile.Mandos",
961
"se.bsnet.fukt.Mandos"))
1108
alt_interface = attribute._dbus_interface.replace(
1109
orig_interface_name, alt_interface_name)
1110
interface_names.add(alt_interface)
962
1111
# Is this a D-Bus signal?
963
1112
if getattr(attribute, "_dbus_is_signal", False):
964
# Extract the original non-method function by
965
# black magic
966
nonmethod_func = (dict(
1113
if sys.version_info.major == 2:
1114
# Extract the original non-method undecorated
1115
# function by black magic
1116
nonmethod_func = (dict(
967
1117
zip(attribute.func_code.co_freevars,
968
attribute.__closure__))["func"]
969
.cell_contents)
1118
attribute.__closure__))
1119
["func"].cell_contents)
1120
else:
1121
nonmethod_func = attribute
970
1122
# Create a new, but exactly alike, function
971
1123
# object, and decorate it to be a new D-Bus signal
972
1124
# with the alternate D-Bus interface name
973
new_function = (dbus.service.signal
974
(alt_interface,
975
attribute._dbus_signature)
976
(types.FunctionType(
977
nonmethod_func.func_code,
978
nonmethod_func.func_globals,
979
nonmethod_func.func_name,
980
nonmethod_func.func_defaults,
981
nonmethod_func.func_closure)))
1125
if sys.version_info.major == 2:
1126
new_function = types.FunctionType(
1127
nonmethod_func.func_code,
1128
nonmethod_func.func_globals,
1129
nonmethod_func.func_name,
1130
nonmethod_func.func_defaults,
1131
nonmethod_func.func_closure)
1132
else:
1133
new_function = types.FunctionType(
1134
nonmethod_func.__code__,
1135
nonmethod_func.__globals__,
1136
nonmethod_func.__name__,
1137
nonmethod_func.__defaults__,
1138
nonmethod_func.__closure__)
1139
new_function = (dbus.service.signal(
1140
alt_interface,
1141
attribute._dbus_signature)(new_function))
1142
# Copy annotations, if any
1143
try:
1144
new_function._dbus_annotations = dict(
1145
attribute._dbus_annotations)
1146
except AttributeError:
1147
pass
982
1148
# Define a creator of a function to call both the
983
# old and new functions, so both the old and new
984
# signals gets sent when the function is called
1149
# original and alternate functions, so both the
1150
# original and alternate signals gets sent when
1151
# the function is called
985
1152
def fixscope(func1, func2):
986
1153
"""This function is a scope container to pass
987
1154
func1 and func2 to the "call_both" function
988
1155
outside of its arguments"""
1156
989
1157
def call_both(*args, **kwargs):
990
1158
"""This function will emit two D-Bus
991
1159
signals by calling func1 and func2"""
992
1160
func1(*args, **kwargs)
993
1161
func2(*args, **kwargs)
1162
994
1163
return call_both
995
1164
# Create the "call_both" function and add it to
996
1165
# the class
997
attr[attrname] = fixscope(attribute,
998
new_function)
1166
attr[attrname] = fixscope(attribute, new_function)
999
1167
# Is this a D-Bus method?
1000
1168
elif getattr(attribute, "_dbus_is_method", False):
1001
1169
# Create a new, but exactly alike, function
1002
1170
# object. Decorate it to be a new D-Bus method
1003
1171
# with the alternate D-Bus interface name. Add it
1004
1172
# to the class.
1005
attr[attrname] = (dbus.service.method
1006
(alt_interface,
1007
attribute._dbus_in_signature,
1008
attribute._dbus_out_signature)
1009
(types.FunctionType
1010
(attribute.func_code,
1011
attribute.func_globals,
1012
attribute.func_name,
1013
attribute.func_defaults,
1014
attribute.func_closure)))
1173
attr[attrname] = (
1174
dbus.service.method(
1175
alt_interface,
1176
attribute._dbus_in_signature,
1177
attribute._dbus_out_signature)
1178
(types.FunctionType(attribute.func_code,
1179
attribute.func_globals,
1180
attribute.func_name,
1181
attribute.func_defaults,
1182
attribute.func_closure)))
1183
# Copy annotations, if any
1184
try:
1185
attr[attrname]._dbus_annotations = dict(
1186
attribute._dbus_annotations)
1187
except AttributeError:
1188
pass
1015
1189
# Is this a D-Bus property?
1016
1190
elif getattr(attribute, "_dbus_is_property", False):
1017
1191
# Create a new, but exactly alike, function
1018
1192
# object, and decorate it to be a new D-Bus
1019
1193
# property with the alternate D-Bus interface
1020
1194
# name. Add it to the class.
1021
attr[attrname] = (dbus_service_property
1022
(alt_interface,
1023
attribute._dbus_signature,
1024
attribute._dbus_access,
1025
attribute
1026
._dbus_get_args_options
1027
["byte_arrays"])
1028
(types.FunctionType
1029
(attribute.func_code,
1030
attribute.func_globals,
1031
attribute.func_name,
1032
attribute.func_defaults,
1033
attribute.func_closure)))
1034
return type.__new__(mcs, name, bases, attr)
1035
1036
1195
attr[attrname] = (dbus_service_property(
1196
alt_interface, attribute._dbus_signature,
1197
attribute._dbus_access,
1198
attribute._dbus_get_args_options
1199
["byte_arrays"])
1200
(types.FunctionType(
1201
attribute.func_code,
1202
attribute.func_globals,
1203
attribute.func_name,
1204
attribute.func_defaults,
1205
attribute.func_closure)))
1206
# Copy annotations, if any
1207
try:
1208
attr[attrname]._dbus_annotations = dict(
1209
attribute._dbus_annotations)
1210
except AttributeError:
1211
pass
1212
# Is this a D-Bus interface?
1213
elif getattr(attribute, "_dbus_is_interface", False):
1214
# Create a new, but exactly alike, function
1215
# object. Decorate it to be a new D-Bus interface
1216
# with the alternate D-Bus interface name. Add it
1217
# to the class.
1218
attr[attrname] = (
1219
dbus_interface_annotations(alt_interface)
1220
(types.FunctionType(attribute.func_code,
1221
attribute.func_globals,
1222
attribute.func_name,
1223
attribute.func_defaults,
1224
attribute.func_closure)))
1225
if deprecate:
1226
# Deprecate all alternate interfaces
1227
iname="_AlternateDBusNames_interface_annotation{}"
1228
for interface_name in interface_names:
1229
1230
@dbus_interface_annotations(interface_name)
1231
def func(self):
1232
return { "org.freedesktop.DBus.Deprecated":
1233
"true" }
1234
# Find an unused name
1235
for aname in (iname.format(i)
1236
for i in itertools.count()):
1237
if aname not in attr:
1238
attr[aname] = func
1239
break
1240
if interface_names:
1241
# Replace the class with a new subclass of it with
1242
# methods, signals, etc. as created above.
1243
cls = type(b"{}Alternate".format(cls.__name__),
1244
(cls, ), attr)
1245
return cls
1246
1247
return wrapper
1248
1249
1250
@alternate_dbus_interfaces({"se.recompile.Mandos":
1251
"se.bsnet.fukt.Mandos"})
1037
1252
class ClientDBus(Client, DBusObjectWithProperties):
1038
1253
"""A Client class using D-Bus
1039
1254
1043
1258
"""
1044
1259
1045
1260
runtime_expansions = (Client.runtime_expansions
1046
+ ("dbus_object_path",))
1261
+ ("dbus_object_path", ))
1262
1263
_interface = "se.recompile.Mandos.Client"
1047
1264
1048
1265
# dbus.service.Object doesn't use super(), so we can't either.
1049
1266
1052
1269
Client.__init__(self, *args, **kwargs)
1053
1270
# Only now, when this client is initialized, can it show up on
1054
1271
# the D-Bus
1055
client_object_name = unicode(self.name).translate(
1272
client_object_name = str(self.name).translate(
1056
1273
{ord("."): ord("_"),
1057
1274
ord("-"): ord("_")})
1058
self.dbus_object_path = (dbus.ObjectPath
1059
("/clients/" + client_object_name))
1275
self.dbus_object_path = dbus.ObjectPath(
1276
"/clients/" + client_object_name)
1060
1277
DBusObjectWithProperties.__init__(self, self.bus,
1061
1278
self.dbus_object_path)
1062
1063
def notifychangeproperty(transform_func,
1064
dbus_name, type_func=lambda x: x,
1065
variant_level=1):
1279
1280
def notifychangeproperty(transform_func, dbus_name,
1281
type_func=lambda x: x,
1282
variant_level=1,
1283
invalidate_only=False,
1284
_interface=_interface):
1066
1285
""" Modify a variable so that it's a property which announces
1067
1286
its changes to DBus.
1068
1287
1073
1292
to the D-Bus. Default: no transform
1074
1293
variant_level: D-Bus variant level. Default: 1
1075
1294
"""
1076
attrname = "_{0}".format(dbus_name)
1295
attrname = "_{}".format(dbus_name)
1296
1077
1297
def setter(self, value):
1078
1298
if hasattr(self, "dbus_object_path"):
1079
1299
if (not hasattr(self, attrname) or
1080
1300
type_func(getattr(self, attrname, None))
1081
1301
!= type_func(value)):
1082
dbus_value = transform_func(type_func(value),
1083
variant_level
1084
=variant_level)
1085
self.PropertyChanged(dbus.String(dbus_name),
1086
dbus_value)
1302
if invalidate_only:
1303
self.PropertiesChanged(
1304
_interface, dbus.Dictionary(),
1305
dbus.Array((dbus_name, )))
1306
else:
1307
dbus_value = transform_func(
1308
type_func(value),
1309
variant_level = variant_level)
1310
self.PropertyChanged(dbus.String(dbus_name),
1311
dbus_value)
1312
self.PropertiesChanged(
1313
_interface,
1314
dbus.Dictionary({ dbus.String(dbus_name):
1315
dbus_value }),
1316
dbus.Array())
1087
1317
setattr(self, attrname, value)
1088
1318
1089
1319
return property(lambda self: getattr(self, attrname), setter)
1090
1320
1091
1092
1321
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1093
1322
approvals_pending = notifychangeproperty(dbus.Boolean,
1094
1323
"ApprovalPending",
1096
1325
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1097
1326
last_enabled = notifychangeproperty(datetime_to_dbus,
1098
1327
"LastEnabled")
1099
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1100
type_func = lambda checker:
1101
checker is not None)
1328
checker = notifychangeproperty(
1329
dbus.Boolean, "CheckerRunning",
1330
type_func = lambda checker: checker is not None)
1102
1331
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1103
1332
"LastCheckedOK")
1104
1333
last_checker_status = notifychangeproperty(dbus.Int16,
1107
1336
datetime_to_dbus, "LastApprovalRequest")
1108
1337
approved_by_default = notifychangeproperty(dbus.Boolean,
1109
1338
"ApprovedByDefault")
1110
approval_delay = notifychangeproperty(dbus.UInt64,
1111
"ApprovalDelay",
1112
type_func =
1113
timedelta_to_milliseconds)
1339
approval_delay = notifychangeproperty(
1340
dbus.UInt64, "ApprovalDelay",
1341
type_func = lambda td: td.total_seconds() * 1000)
1114
1342
approval_duration = notifychangeproperty(
1115
1343
dbus.UInt64, "ApprovalDuration",
1116
type_func = timedelta_to_milliseconds)
1344
type_func = lambda td: td.total_seconds() * 1000)
1117
1345
host = notifychangeproperty(dbus.String, "Host")
1118
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1119
type_func =
1120
timedelta_to_milliseconds)
1346
timeout = notifychangeproperty(
1347
dbus.UInt64, "Timeout",
1348
type_func = lambda td: td.total_seconds() * 1000)
1121
1349
extended_timeout = notifychangeproperty(
1122
1350
dbus.UInt64, "ExtendedTimeout",
1123
type_func = timedelta_to_milliseconds)
1124
interval = notifychangeproperty(dbus.UInt64,
1125
"Interval",
1126
type_func =
1127
timedelta_to_milliseconds)
1351
type_func = lambda td: td.total_seconds() * 1000)
1352
interval = notifychangeproperty(
1353
dbus.UInt64, "Interval",
1354
type_func = lambda td: td.total_seconds() * 1000)
1128
1355
checker_command = notifychangeproperty(dbus.String, "Checker")
1356
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1357
invalidate_only=True)
1129
1358
1130
1359
del notifychangeproperty
1131
1360
1138
1367
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1139
1368
Client.__del__(self, *args, **kwargs)
1140
1369
1141
def checker_callback(self, pid, condition, command,
1142
*args, **kwargs):
1143
self.checker_callback_tag = None
1144
self.checker = None
1145
if os.WIFEXITED(condition):
1146
exitstatus = os.WEXITSTATUS(condition)
1370
def checker_callback(self, source, condition,
1371
connection, command, *args, **kwargs):
1372
ret = Client.checker_callback(self, source, condition,
1373
connection, command, *args,
1374
**kwargs)
1375
exitstatus = self.last_checker_status
1376
if exitstatus >= 0:
1147
1377
# Emit D-Bus signal
1148
1378
self.CheckerCompleted(dbus.Int16(exitstatus),
1149
dbus.Int64(condition),
1379
dbus.Int64(0),
1150
1380
dbus.String(command))
1151
1381
else:
1152
1382
# Emit D-Bus signal
1153
1383
self.CheckerCompleted(dbus.Int16(-1),
1154
dbus.Int64(condition),
1384
dbus.Int64(
1385
self.last_checker_signal),
1155
1386
dbus.String(command))
1156
1157
return Client.checker_callback(self, pid, condition, command,
1158
*args, **kwargs)
1387
return ret
1159
1388
1160
1389
def start_checker(self, *args, **kwargs):
1161
old_checker = self.checker
1162
if self.checker is not None:
1163
old_checker_pid = self.checker.pid
1164
else:
1165
old_checker_pid = None
1390
old_checker_pid = getattr(self.checker, "pid", None)
1166
1391
r = Client.start_checker(self, *args, **kwargs)
1167
1392
# Only if new checker process was started
1168
1393
if (self.checker is not None
1176
1401
return False
1177
1402
1178
1403
def approve(self, value=True):
1179
self.send_changedstate()
1180
1404
self.approved = value
1181
gobject.timeout_add(timedelta_to_milliseconds
1182
(self.approval_duration),
1183
self._reset_approved)
1184
1405
gobject.timeout_add(int(self.approval_duration.total_seconds()
1406
* 1000), self._reset_approved)
1407
self.send_changedstate()
1185
1408
1186
1409
## D-Bus methods, signals & properties
1187
_interface = "se.recompile.Mandos.Client"
1410
1411
## Interfaces
1188
1412
1189
1413
## Signals
1190
1414
1201
1425
pass
1202
1426
1203
1427
# PropertyChanged - signal
1428
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1204
1429
@dbus.service.signal(_interface, signature="sv")
1205
1430
def PropertyChanged(self, property, value):
1206
1431
"D-Bus signal"
1270
1495
return dbus.Boolean(bool(self.approvals_pending))
1271
1496
1272
1497
# ApprovedByDefault - property
1273
@dbus_service_property(_interface, signature="b",
1498
@dbus_service_property(_interface,
1499
signature="b",
1274
1500
access="readwrite")
1275
1501
def ApprovedByDefault_dbus_property(self, value=None):
1276
1502
if value is None: # get
1278
1504
self.approved_by_default = bool(value)
1279
1505
1280
1506
# ApprovalDelay - property
1281
@dbus_service_property(_interface, signature="t",
1507
@dbus_service_property(_interface,
1508
signature="t",
1282
1509
access="readwrite")
1283
1510
def ApprovalDelay_dbus_property(self, value=None):
1284
1511
if value is None: # get
1285
return dbus.UInt64(self.approval_delay_milliseconds())
1512
return dbus.UInt64(self.approval_delay.total_seconds()
1513
* 1000)
1286
1514
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1287
1515
1288
1516
# ApprovalDuration - property
1289
@dbus_service_property(_interface, signature="t",
1517
@dbus_service_property(_interface,
1518
signature="t",
1290
1519
access="readwrite")
1291
1520
def ApprovalDuration_dbus_property(self, value=None):
1292
1521
if value is None: # get
1293
return dbus.UInt64(timedelta_to_milliseconds(
1294
self.approval_duration))
1522
return dbus.UInt64(self.approval_duration.total_seconds()
1523
* 1000)
1295
1524
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1296
1525
1297
1526
# Name - property
1305
1534
return dbus.String(self.fingerprint)
1306
1535
1307
1536
# Host - property
1308
@dbus_service_property(_interface, signature="s",
1537
@dbus_service_property(_interface,
1538
signature="s",
1309
1539
access="readwrite")
1310
1540
def Host_dbus_property(self, value=None):
1311
1541
if value is None: # get
1312
1542
return dbus.String(self.host)
1313
self.host = unicode(value)
1543
self.host = str(value)
1314
1544
1315
1545
# Created - property
1316
1546
@dbus_service_property(_interface, signature="s", access="read")
1323
1553
return datetime_to_dbus(self.last_enabled)
1324
1554
1325
1555
# Enabled - property
1326
@dbus_service_property(_interface, signature="b",
1556
@dbus_service_property(_interface,
1557
signature="b",
1327
1558
access="readwrite")
1328
1559
def Enabled_dbus_property(self, value=None):
1329
1560
if value is None: # get
1334
1565
self.disable()
1335
1566
1336
1567
# LastCheckedOK - property
1337
@dbus_service_property(_interface, signature="s",
1568
@dbus_service_property(_interface,
1569
signature="s",
1338
1570
access="readwrite")
1339
1571
def LastCheckedOK_dbus_property(self, value=None):
1340
1572
if value is not None:
1343
1575
return datetime_to_dbus(self.last_checked_ok)
1344
1576
1345
1577
# LastCheckerStatus - property
1346
@dbus_service_property(_interface, signature="n",
1347
access="read")
1578
@dbus_service_property(_interface, signature="n", access="read")
1348
1579
def LastCheckerStatus_dbus_property(self):
1349
1580
return dbus.Int16(self.last_checker_status)
1350
1581
1359
1590
return datetime_to_dbus(self.last_approval_request)
1360
1591
1361
1592
# Timeout - property
1362
@dbus_service_property(_interface, signature="t",
1593
@dbus_service_property(_interface,
1594
signature="t",
1363
1595
access="readwrite")
1364
1596
def Timeout_dbus_property(self, value=None):
1365
1597
if value is None: # get
1366
return dbus.UInt64(self.timeout_milliseconds())
1598
return dbus.UInt64(self.timeout.total_seconds() * 1000)
1599
old_timeout = self.timeout
1367
1600
self.timeout = datetime.timedelta(0, 0, 0, value)
1368
# Reschedule timeout
1601
# Reschedule disabling
1369
1602
if self.enabled:
1370
1603
now = datetime.datetime.utcnow()
1371
time_to_die = timedelta_to_milliseconds(
1372
(self.last_checked_ok + self.timeout) - now)
1373
if time_to_die <= 0:
1604
self.expires += self.timeout - old_timeout
1605
if self.expires <= now:
1374
1606
# The timeout has passed
1375
1607
self.disable()
1376
1608
else:
1377
self.expires = (now +
1378
datetime.timedelta(milliseconds =
1379
time_to_die))
1380
1609
if (getattr(self, "disable_initiator_tag", None)
1381
1610
is None):
1382
1611
return
1383
1612
gobject.source_remove(self.disable_initiator_tag)
1384
self.disable_initiator_tag = (gobject.timeout_add
1385
(time_to_die,
1386
self.disable))
1613
self.disable_initiator_tag = gobject.timeout_add(
1614
int((self.expires - now).total_seconds() * 1000),
1615
self.disable)
1387
1616
1388
1617
# ExtendedTimeout - property
1389
@dbus_service_property(_interface, signature="t",
1618
@dbus_service_property(_interface,
1619
signature="t",
1390
1620
access="readwrite")
1391
1621
def ExtendedTimeout_dbus_property(self, value=None):
1392
1622
if value is None: # get
1393
return dbus.UInt64(self.extended_timeout_milliseconds())
1623
return dbus.UInt64(self.extended_timeout.total_seconds()
1624
* 1000)
1394
1625
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1395
1626
1396
1627
# Interval - property
1397
@dbus_service_property(_interface, signature="t",
1628
@dbus_service_property(_interface,
1629
signature="t",
1398
1630
access="readwrite")
1399
1631
def Interval_dbus_property(self, value=None):
1400
1632
if value is None: # get
1401
return dbus.UInt64(self.interval_milliseconds())
1633
return dbus.UInt64(self.interval.total_seconds() * 1000)
1402
1634
self.interval = datetime.timedelta(0, 0, 0, value)
1403
1635
if getattr(self, "checker_initiator_tag", None) is None:
1404
1636
return
1405
1637
if self.enabled:
1406
1638
# Reschedule checker run
1407
1639
gobject.source_remove(self.checker_initiator_tag)
1408
self.checker_initiator_tag = (gobject.timeout_add
1409
(value, self.start_checker))
1410
self.start_checker() # Start one now, too
1640
self.checker_initiator_tag = gobject.timeout_add(
1641
value, self.start_checker)
1642
self.start_checker() # Start one now, too
1411
1643
1412
1644
# Checker - property
1413
@dbus_service_property(_interface, signature="s",
1645
@dbus_service_property(_interface,
1646
signature="s",
1414
1647
access="readwrite")
1415
1648
def Checker_dbus_property(self, value=None):
1416
1649
if value is None: # get
1417
1650
return dbus.String(self.checker_command)
1418
self.checker_command = unicode(value)
1651
self.checker_command = str(value)
1419
1652
1420
1653
# CheckerRunning - property
1421
@dbus_service_property(_interface, signature="b",
1654
@dbus_service_property(_interface,
1655
signature="b",
1422
1656
access="readwrite")
1423
1657
def CheckerRunning_dbus_property(self, value=None):
1424
1658
if value is None: # get
1434
1668
return self.dbus_object_path # is already a dbus.ObjectPath
1435
1669
1436
1670
# Secret = property
1437
@dbus_service_property(_interface, signature="ay",
1438
access="write", byte_arrays=True)
1671
@dbus_service_property(_interface,
1672
signature="ay",
1673
access="write",
1674
byte_arrays=True)
1439
1675
def Secret_dbus_property(self, value):
1440
self.secret = str(value)
1676
self.secret = bytes(value)
1441
1677
1442
1678
del _interface
1443
1679
1447
1683
self._pipe = child_pipe
1448
1684
self._pipe.send(('init', fpr, address))
1449
1685
if not self._pipe.recv():
1450
raise KeyError()
1686
raise KeyError(fpr)
1451
1687
1452
1688
def __getattribute__(self, name):
1453
1689
if name == '_pipe':
1457
1693
if data[0] == 'data':
1458
1694
return data[1]
1459
1695
if data[0] == 'function':
1696
1460
1697
def func(*args, **kwargs):
1461
1698
self._pipe.send(('funcall', name, args, kwargs))
1462
1699
return self._pipe.recv()[1]
1700
1463
1701
return func
1464
1702
1465
1703
def __setattr__(self, name, value):
1468
1706
self._pipe.send(('setattr', name, value))
1469
1707
1470
1708
1471
class ClientDBusTransitional(ClientDBus):
1472
__metaclass__ = AlternateDBusNamesMetaclass
1473
1474
1475
1709
class ClientHandler(socketserver.BaseRequestHandler, object):
1476
1710
"""A class to handle client connections.
1477
1711
1481
1715
def handle(self):
1482
1716
with contextlib.closing(self.server.child_pipe) as child_pipe:
1483
1717
logger.info("TCP connection from: %s",
1484
unicode(self.client_address))
1718
str(self.client_address))
1485
1719
logger.debug("Pipe FD: %d",
1486
1720
self.server.child_pipe.fileno())
1487
1721
1488
session = (gnutls.connection
1489
.ClientSession(self.request,
1490
gnutls.connection
1491
.X509Credentials()))
1722
session = gnutls.connection.ClientSession(
1723
self.request, gnutls.connection .X509Credentials())
1492
1724
1493
1725
# Note: gnutls.connection.X509Credentials is really a
1494
1726
# generic GnuTLS certificate credentials object so long as
1503
1735
priority = self.server.gnutls_priority
1504
1736
if priority is None:
1505
1737
priority = "NORMAL"
1506
(gnutls.library.functions
1507
.gnutls_priority_set_direct(session._c_object,
1508
priority, None))
1738
gnutls.library.functions.gnutls_priority_set_direct(
1739
session._c_object, priority, None)
1509
1740
1510
1741
# Start communication using the Mandos protocol
1511
1742
# Get protocol number
1513
1744
logger.debug("Protocol version: %r", line)
1514
1745
try:
1515
1746
if int(line.strip().split()[0]) > 1:
1516
raise RuntimeError
1747
raise RuntimeError(line)
1517
1748
except (ValueError, IndexError, RuntimeError) as error:
1518
1749
logger.error("Unknown protocol version: %s", error)
1519
1750
return
1531
1762
approval_required = False
1532
1763
try:
1533
1764
try:
1534
fpr = self.fingerprint(self.peer_certificate
1535
(session))
1765
fpr = self.fingerprint(
1766
self.peer_certificate(session))
1536
1767
except (TypeError,
1537
1768
gnutls.errors.GNUTLSError) as error:
1538
1769
logger.warning("Bad certificate: %s", error)
1553
1784
while True:
1554
1785
if not client.enabled:
1555
1786
logger.info("Client %s is disabled",
1556
client.name)
1787
client.name)
1557
1788
if self.server.use_dbus:
1558
1789
# Emit D-Bus signal
1559
1790
client.Rejected("Disabled")
1568
1799
if self.server.use_dbus:
1569
1800
# Emit D-Bus signal
1570
1801
client.NeedApproval(
1571
client.approval_delay_milliseconds(),
1572
client.approved_by_default)
1802
client.approval_delay.total_seconds()
1803
* 1000, client.approved_by_default)
1573
1804
else:
1574
1805
logger.warning("Client %s was not approved",
1575
1806
client.name)
1581
1812
#wait until timeout or approved
1582
1813
time = datetime.datetime.now()
1583
1814
client.changedstate.acquire()
1584
(client.changedstate.wait
1585
(float(client.timedelta_to_milliseconds(delay)
1586
/ 1000)))
1815
client.changedstate.wait(delay.total_seconds())
1587
1816
client.changedstate.release()
1588
1817
time2 = datetime.datetime.now()
1589
1818
if (time2 - time) >= delay:
1605
1834
try:
1606
1835
sent = session.send(client.secret[sent_size:])
1607
1836
except gnutls.errors.GNUTLSError as error:
1608
logger.warning("gnutls send failed")
1837
logger.warning("gnutls send failed",
1838
exc_info=error)
1609
1839
return
1610
logger.debug("Sent: %d, remaining: %d",
1611
sent, len(client.secret)
1612
- (sent_size + sent))
1840
logger.debug("Sent: %d, remaining: %d", sent,
1841
len(client.secret) - (sent_size
1842
+ sent))
1613
1843
sent_size += sent
1614
1844
1615
1845
logger.info("Sending secret to %s", client.name)
1625
1855
try:
1626
1856
session.bye()
1627
1857
except gnutls.errors.GNUTLSError as error:
1628
logger.warning("GnuTLS bye failed")
1858
logger.warning("GnuTLS bye failed",
1859
exc_info=error)
1629
1860
1630
1861
@staticmethod
1631
1862
def peer_certificate(session):
1632
1863
"Return the peer's OpenPGP certificate as a bytestring"
1633
1864
# If not an OpenPGP certificate...
1634
if (gnutls.library.functions
1635
.gnutls_certificate_type_get(session._c_object)
1865
if (gnutls.library.functions.gnutls_certificate_type_get(
1866
session._c_object)
1636
1867
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1637
1868
# ...do the normal thing
1638
1869
return session.peer_certificate
1652
1883
def fingerprint(openpgp):
1653
1884
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1654
1885
# New GnuTLS "datum" with the OpenPGP public key
1655
datum = (gnutls.library.types
1656
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1657
ctypes.POINTER
1658
(ctypes.c_ubyte)),
1659
ctypes.c_uint(len(openpgp))))
1886
datum = gnutls.library.types.gnutls_datum_t(
1887
ctypes.cast(ctypes.c_char_p(openpgp),
1888
ctypes.POINTER(ctypes.c_ubyte)),
1889
ctypes.c_uint(len(openpgp)))
1660
1890
# New empty GnuTLS certificate
1661
1891
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1662
(gnutls.library.functions
1663
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1892
gnutls.library.functions.gnutls_openpgp_crt_init(
1893
ctypes.byref(crt))
1664
1894
# Import the OpenPGP public key into the certificate
1665
(gnutls.library.functions
1666
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1667
gnutls.library.constants
1668
.GNUTLS_OPENPGP_FMT_RAW))
1895
gnutls.library.functions.gnutls_openpgp_crt_import(
1896
crt, ctypes.byref(datum),
1897
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
1669
1898
# Verify the self signature in the key
1670
1899
crtverify = ctypes.c_uint()
1671
(gnutls.library.functions
1672
.gnutls_openpgp_crt_verify_self(crt, 0,
1673
ctypes.byref(crtverify)))
1900
gnutls.library.functions.gnutls_openpgp_crt_verify_self(
1901
crt, 0, ctypes.byref(crtverify))
1674
1902
if crtverify.value != 0:
1675
1903
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1676
raise (gnutls.errors.CertificateSecurityError
1677
("Verify failed"))
1904
raise gnutls.errors.CertificateSecurityError(
1905
"Verify failed")
1678
1906
# New buffer for the fingerprint
1679
1907
buf = ctypes.create_string_buffer(20)
1680
1908
buf_len = ctypes.c_size_t()
1681
1909
# Get the fingerprint from the certificate into the buffer
1682
(gnutls.library.functions
1683
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1684
ctypes.byref(buf_len)))
1910
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint(
1911
crt, ctypes.byref(buf), ctypes.byref(buf_len))
1685
1912
# Deinit the certificate
1686
1913
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1687
1914
# Convert the buffer to a Python bytestring
1693
1920
1694
1921
class MultiprocessingMixIn(object):
1695
1922
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1923
1696
1924
def sub_process_main(self, request, address):
1697
1925
try:
1698
1926
self.finish_request(request, address)
1703
1931
def process_request(self, request, address):
1704
1932
"""Start a new process to process the request."""
1705
1933
proc = multiprocessing.Process(target = self.sub_process_main,
1706
args = (request,
1707
address))
1934
args = (request, address))
1708
1935
proc.start()
1709
1936
return proc
1710
1937
1711
1938
1712
1939
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1713
1940
""" adds a pipe to the MixIn """
1941
1714
1942
def process_request(self, request, client_address):
1715
1943
"""Overrides and wraps the original process_request().
1716
1944
1725
1953
1726
1954
def add_pipe(self, parent_pipe, proc):
1727
1955
"""Dummy function; override as necessary"""
1728
raise NotImplementedError
1956
raise NotImplementedError()
1729
1957
1730
1958
1731
1959
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1737
1965
interface: None or a network interface name (string)
1738
1966
use_ipv6: Boolean; to use IPv6 or not
1739
1967
"""
1968
1740
1969
def __init__(self, server_address, RequestHandlerClass,
1741
interface=None, use_ipv6=True):
1970
interface=None,
1971
use_ipv6=True,
1972
socketfd=None):
1973
"""If socketfd is set, use that file descriptor instead of
1974
creating a new one with socket.socket().
1975
"""
1742
1976
self.interface = interface
1743
1977
if use_ipv6:
1744
1978
self.address_family = socket.AF_INET6
1979
if socketfd is not None:
1980
# Save the file descriptor
1981
self.socketfd = socketfd
1982
# Save the original socket.socket() function
1983
self.socket_socket = socket.socket
1984
# To implement --socket, we monkey patch socket.socket.
1985
#
1986
# (When socketserver.TCPServer is a new-style class, we
1987
# could make self.socket into a property instead of monkey
1988
# patching socket.socket.)
1989
#
1990
# Create a one-time-only replacement for socket.socket()
1991
@functools.wraps(socket.socket)
1992
def socket_wrapper(*args, **kwargs):
1993
# Restore original function so subsequent calls are
1994
# not affected.
1995
socket.socket = self.socket_socket
1996
del self.socket_socket
1997
# This time only, return a new socket object from the
1998
# saved file descriptor.
1999
return socket.fromfd(self.socketfd, *args, **kwargs)
2000
# Replace socket.socket() function with wrapper
2001
socket.socket = socket_wrapper
2002
# The socketserver.TCPServer.__init__ will call
2003
# socket.socket(), which might be our replacement,
2004
# socket_wrapper(), if socketfd was set.
1745
2005
socketserver.TCPServer.__init__(self, server_address,
1746
2006
RequestHandlerClass)
2007
1747
2008
def server_bind(self):
1748
2009
"""This overrides the normal server_bind() function
1749
2010
to bind to an interface if one was specified, and also NOT to
1755
2016
self.interface)
1756
2017
else:
1757
2018
try:
1758
self.socket.setsockopt(socket.SOL_SOCKET,
1759
SO_BINDTODEVICE,
1760
str(self.interface
1761
+ '\0'))
2019
self.socket.setsockopt(
2020
socket.SOL_SOCKET, SO_BINDTODEVICE,
2021
(self.interface + "\0").encode("utf-8"))
1762
2022
except socket.error as error:
1763
if error[0] == errno.EPERM:
1764
logger.error("No permission to"
1765
" bind to interface %s",
1766
self.interface)
1767
elif error[0] == errno.ENOPROTOOPT:
2023
if error.errno == errno.EPERM:
2024
logger.error("No permission to bind to"
2025
" interface %s", self.interface)
2026
elif error.errno == errno.ENOPROTOOPT:
1768
2027
logger.error("SO_BINDTODEVICE not available;"
1769
2028
" cannot bind to interface %s",
1770
2029
self.interface)
2030
elif error.errno == errno.ENODEV:
2031
logger.error("Interface %s does not exist,"
2032
" cannot bind", self.interface)
1771
2033
else:
1772
2034
raise
1773
2035
# Only bind(2) the socket if we really need to.
1776
2038
if self.address_family == socket.AF_INET6:
1777
2039
any_address = "::" # in6addr_any
1778
2040
else:
1779
any_address = socket.INADDR_ANY
2041
any_address = "0.0.0.0" # INADDR_ANY
1780
2042
self.server_address = (any_address,
1781
2043
self.server_address[1])
1782
2044
elif not self.server_address[1]:
1783
self.server_address = (self.server_address[0],
1784
0)
2045
self.server_address = (self.server_address[0], 0)
1785
2046
# if self.interface:
1786
2047
# self.server_address = (self.server_address[0],
1787
2048
# 0, # port
1801
2062
1802
2063
Assumes a gobject.MainLoop event loop.
1803
2064
"""
2065
1804
2066
def __init__(self, server_address, RequestHandlerClass,
1805
interface=None, use_ipv6=True, clients=None,
1806
gnutls_priority=None, use_dbus=True):
2067
interface=None,
2068
use_ipv6=True,
2069
clients=None,
2070
gnutls_priority=None,
2071
use_dbus=True,
2072
socketfd=None):
1807
2073
self.enabled = False
1808
2074
self.clients = clients
1809
2075
if self.clients is None:
1813
2079
IPv6_TCPServer.__init__(self, server_address,
1814
2080
RequestHandlerClass,
1815
2081
interface = interface,
1816
use_ipv6 = use_ipv6)
2082
use_ipv6 = use_ipv6,
2083
socketfd = socketfd)
2084
1817
2085
def server_activate(self):
1818
2086
if self.enabled:
1819
2087
return socketserver.TCPServer.server_activate(self)
1823
2091
1824
2092
def add_pipe(self, parent_pipe, proc):
1825
2093
# Call "handle_ipc" for both data and EOF events
1826
gobject.io_add_watch(parent_pipe.fileno(),
1827
gobject.IO_IN | gobject.IO_HUP,
1828
functools.partial(self.handle_ipc,
1829
parent_pipe =
1830
parent_pipe,
1831
proc = proc))
2094
gobject.io_add_watch(
2095
parent_pipe.fileno(),
2096
gobject.IO_IN | gobject.IO_HUP,
2097
functools.partial(self.handle_ipc,
2098
parent_pipe = parent_pipe,
2099
proc = proc))
1832
2100
1833
def handle_ipc(self, source, condition, parent_pipe=None,
1834
proc = None, client_object=None):
1835
condition_names = {
1836
gobject.IO_IN: "IN", # There is data to read.
1837
gobject.IO_OUT: "OUT", # Data can be written (without
1838
# blocking).
1839
gobject.IO_PRI: "PRI", # There is urgent data to read.
1840
gobject.IO_ERR: "ERR", # Error condition.
1841
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1842
# broken, usually for pipes and
1843
# sockets).
1844
}
1845
conditions_string = ' | '.join(name
1846
for cond, name in
1847
condition_names.iteritems()
1848
if cond & condition)
2101
def handle_ipc(self, source, condition,
2102
parent_pipe=None,
2103
proc = None,
2104
client_object=None):
1849
2105
# error, or the other end of multiprocessing.Pipe has closed
1850
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
2106
if condition & (gobject.IO_ERR | gobject.IO_HUP):
1851
2107
# Wait for other process to exit
1852
2108
proc.join()
1853
2109
return False
1874
2130
parent_pipe.send(False)
1875
2131
return False
1876
2132
1877
gobject.io_add_watch(parent_pipe.fileno(),
1878
gobject.IO_IN | gobject.IO_HUP,
1879
functools.partial(self.handle_ipc,
1880
parent_pipe =
1881
parent_pipe,
1882
proc = proc,
1883
client_object =
1884
client))
2133
gobject.io_add_watch(
2134
parent_pipe.fileno(),
2135
gobject.IO_IN | gobject.IO_HUP,
2136
functools.partial(self.handle_ipc,
2137
parent_pipe = parent_pipe,
2138
proc = proc,
2139
client_object = client))
1885
2140
parent_pipe.send(True)
1886
2141
# remove the old hook in favor of the new above hook on
1887
2142
# same fileno
1893
2148
1894
2149
parent_pipe.send(('data', getattr(client_object,
1895
2150
funcname)(*args,
1896
**kwargs)))
2151
**kwargs)))
1897
2152
1898
2153
if command == 'getattr':
1899
2154
attrname = request[1]
1900
if callable(client_object.__getattribute__(attrname)):
1901
parent_pipe.send(('function',))
2155
if isinstance(client_object.__getattribute__(attrname),
2156
collections.Callable):
2157
parent_pipe.send(('function', ))
1902
2158
else:
1903
parent_pipe.send(('data', client_object
1904
.__getattribute__(attrname)))
2159
parent_pipe.send((
2160
'data', client_object.__getattribute__(attrname)))
1905
2161
1906
2162
if command == 'setattr':
1907
2163
attrname = request[1]
1911
2167
return True
1912
2168
1913
2169
2170
def rfc3339_duration_to_delta(duration):
2171
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2172
2173
>>> rfc3339_duration_to_delta("P7D")
2174
datetime.timedelta(7)
2175
>>> rfc3339_duration_to_delta("PT60S")
2176
datetime.timedelta(0, 60)
2177
>>> rfc3339_duration_to_delta("PT60M")
2178
datetime.timedelta(0, 3600)
2179
>>> rfc3339_duration_to_delta("PT24H")
2180
datetime.timedelta(1)
2181
>>> rfc3339_duration_to_delta("P1W")
2182
datetime.timedelta(7)
2183
>>> rfc3339_duration_to_delta("PT5M30S")
2184
datetime.timedelta(0, 330)
2185
>>> rfc3339_duration_to_delta("P1DT3M20S")
2186
datetime.timedelta(1, 200)
2187
"""
2188
2189
# Parsing an RFC 3339 duration with regular expressions is not
2190
# possible - there would have to be multiple places for the same
2191
# values, like seconds. The current code, while more esoteric, is
2192
# cleaner without depending on a parsing library. If Python had a
2193
# built-in library for parsing we would use it, but we'd like to
2194
# avoid excessive use of external libraries.
2195
2196
# New type for defining tokens, syntax, and semantics all-in-one
2197
Token = collections.namedtuple("Token", (
2198
"regexp", # To match token; if "value" is not None, must have
2199
# a "group" containing digits
2200
"value", # datetime.timedelta or None
2201
"followers")) # Tokens valid after this token
2202
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2203
# the "duration" ABNF definition in RFC 3339, Appendix A.
2204
token_end = Token(re.compile(r"$"), None, frozenset())
2205
token_second = Token(re.compile(r"(\d+)S"),
2206
datetime.timedelta(seconds=1),
2207
frozenset((token_end, )))
2208
token_minute = Token(re.compile(r"(\d+)M"),
2209
datetime.timedelta(minutes=1),
2210
frozenset((token_second, token_end)))
2211
token_hour = Token(re.compile(r"(\d+)H"),
2212
datetime.timedelta(hours=1),
2213
frozenset((token_minute, token_end)))
2214
token_time = Token(re.compile(r"T"),
2215
None,
2216
frozenset((token_hour, token_minute,
2217
token_second)))
2218
token_day = Token(re.compile(r"(\d+)D"),
2219
datetime.timedelta(days=1),
2220
frozenset((token_time, token_end)))
2221
token_month = Token(re.compile(r"(\d+)M"),
2222
datetime.timedelta(weeks=4),
2223
frozenset((token_day, token_end)))
2224
token_year = Token(re.compile(r"(\d+)Y"),
2225
datetime.timedelta(weeks=52),
2226
frozenset((token_month, token_end)))
2227
token_week = Token(re.compile(r"(\d+)W"),
2228
datetime.timedelta(weeks=1),
2229
frozenset((token_end, )))
2230
token_duration = Token(re.compile(r"P"), None,
2231
frozenset((token_year, token_month,
2232
token_day, token_time,
2233
token_week)))
2234
# Define starting values
2235
value = datetime.timedelta() # Value so far
2236
found_token = None
2237
followers = frozenset((token_duration, )) # Following valid tokens
2238
s = duration # String left to parse
2239
# Loop until end token is found
2240
while found_token is not token_end:
2241
# Search for any currently valid tokens
2242
for token in followers:
2243
match = token.regexp.match(s)
2244
if match is not None:
2245
# Token found
2246
if token.value is not None:
2247
# Value found, parse digits
2248
factor = int(match.group(1), 10)
2249
# Add to value so far
2250
value += factor * token.value
2251
# Strip token from string
2252
s = token.regexp.sub("", s, 1)
2253
# Go to found token
2254
found_token = token
2255
# Set valid next tokens
2256
followers = found_token.followers
2257
break
2258
else:
2259
# No currently valid tokens were found
2260
raise ValueError("Invalid RFC 3339 duration: {!r}"
2261
.format(duration))
2262
# End token found
2263
return value
2264
2265
1914
2266
def string_to_delta(interval):
1915
2267
"""Parse a string and return a datetime.timedelta
1916
2268
1927
2279
>>> string_to_delta('5m 30s')
1928
2280
datetime.timedelta(0, 330)
1929
2281
"""
2282
2283
try:
2284
return rfc3339_duration_to_delta(interval)
2285
except ValueError:
2286
pass
2287
1930
2288
timevalue = datetime.timedelta(0)
1931
2289
for s in interval.split():
1932
2290
try:
1933
suffix = unicode(s[-1])
2291
suffix = s[-1]
1934
2292
value = int(s[:-1])
1935
2293
if suffix == "d":
1936
2294
delta = datetime.timedelta(value)
1943
2301
elif suffix == "w":
1944
2302
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1945
2303
else:
1946
raise ValueError("Unknown suffix %r" % suffix)
1947
except (ValueError, IndexError) as e:
2304
raise ValueError("Unknown suffix {!r}".format(suffix))
2305
except IndexError as e:
1948
2306
raise ValueError(*(e.args))
1949
2307
timevalue += delta
1950
2308
return timevalue
1963
2321
sys.exit()
1964
2322
if not noclose:
1965
2323
# Close all standard open file descriptors
1966
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2324
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1967
2325
if not stat.S_ISCHR(os.fstat(null).st_mode):
1968
2326
raise OSError(errno.ENODEV,
1969
"%s not a character device"
1970
% os.path.devnull)
2327
"{} not a character device"
2328
.format(os.devnull))
1971
2329
os.dup2(null, sys.stdin.fileno())
1972
2330
os.dup2(null, sys.stdout.fileno())
1973
2331
os.dup2(null, sys.stderr.fileno())
1982
2340
1983
2341
parser = argparse.ArgumentParser()
1984
2342
parser.add_argument("-v", "--version", action="version",
1985
version = "%%(prog)s %s" % version,
2343
version = "%(prog)s {}".format(version),
1986
2344
help="show version number and exit")
1987
2345
parser.add_argument("-i", "--interface", metavar="IF",
1988
2346
help="Bind to interface IF")
1994
2352
help="Run self-test")
1995
2353
parser.add_argument("--debug", action="store_true",
1996
2354
help="Debug mode; run in foreground and log"
1997
" to terminal")
2355
" to terminal", default=None)
1998
2356
parser.add_argument("--debuglevel", metavar="LEVEL",
1999
2357
help="Debug level for stdout output")
2000
2358
parser.add_argument("--priority", help="GnuTLS"
2007
2365
" files")
2008
2366
parser.add_argument("--no-dbus", action="store_false",
2009
2367
dest="use_dbus", help="Do not provide D-Bus"
2010
" system bus interface")
2368
" system bus interface", default=None)
2011
2369
parser.add_argument("--no-ipv6", action="store_false",
2012
dest="use_ipv6", help="Do not use IPv6")
2370
dest="use_ipv6", help="Do not use IPv6",
2371
default=None)
2013
2372
parser.add_argument("--no-restore", action="store_false",
2014
2373
dest="restore", help="Do not restore stored"
2015
" state")
2374
" state", default=None)
2375
parser.add_argument("--socket", type=int,
2376
help="Specify a file descriptor to a network"
2377
" socket to use instead of creating one")
2016
2378
parser.add_argument("--statedir", metavar="DIR",
2017
2379
help="Directory to save/restore state in")
2380
parser.add_argument("--foreground", action="store_true",
2381
help="Run in foreground", default=None)
2382
parser.add_argument("--no-zeroconf", action="store_false",
2383
dest="zeroconf", help="Do not use Zeroconf",
2384
default=None)
2018
2385
2019
2386
options = parser.parse_args()
2020
2387
2021
2388
if options.check:
2022
2389
import doctest
2023
doctest.testmod()
2024
sys.exit()
2390
fail_count, test_count = doctest.testmod()
2391
sys.exit(os.EX_OK if fail_count == 0 else 1)
2025
2392
2026
2393
# Default values for config file for server-global settings
2027
2394
server_defaults = { "interface": "",
2029
2396
"port": "",
2030
2397
"debug": "False",
2031
2398
"priority":
2032
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2399
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2400
":+SIGN-RSA-SHA224:+SIGN-RSA-RMD160",
2033
2401
"servicename": "Mandos",
2034
2402
"use_dbus": "True",
2035
2403
"use_ipv6": "True",
2036
2404
"debuglevel": "",
2037
2405
"restore": "True",
2038
"statedir": "/var/lib/mandos"
2039
}
2406
"socket": "",
2407
"statedir": "/var/lib/mandos",
2408
"foreground": "False",
2409
"zeroconf": "True",
2410
}
2040
2411
2041
2412
# Parse config file for server-global settings
2042
2413
server_config = configparser.SafeConfigParser(server_defaults)
2043
2414
del server_defaults
2044
server_config.read(os.path.join(options.configdir,
2045
"mandos.conf"))
2415
server_config.read(os.path.join(options.configdir, "mandos.conf"))
2046
2416
# Convert the SafeConfigParser object to a dict
2047
2417
server_settings = server_config.defaults()
2048
2418
# Use the appropriate methods on the non-string config options
2049
for option in ("debug", "use_dbus", "use_ipv6"):
2419
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
2050
2420
server_settings[option] = server_config.getboolean("DEFAULT",
2051
2421
option)
2052
2422
if server_settings["port"]:
2053
2423
server_settings["port"] = server_config.getint("DEFAULT",
2054
2424
"port")
2425
if server_settings["socket"]:
2426
server_settings["socket"] = server_config.getint("DEFAULT",
2427
"socket")
2428
# Later, stdin will, and stdout and stderr might, be dup'ed
2429
# over with an opened os.devnull. But we don't want this to
2430
# happen with a supplied network socket.
2431
if 0 <= server_settings["socket"] <= 2:
2432
server_settings["socket"] = os.dup(server_settings
2433
["socket"])
2055
2434
del server_config
2056
2435
2057
2436
# Override the settings from the config file with command line
2058
2437
# options, if set.
2059
2438
for option in ("interface", "address", "port", "debug",
2060
"priority", "servicename", "configdir",
2061
"use_dbus", "use_ipv6", "debuglevel", "restore",
2062
"statedir"):
2439
"priority", "servicename", "configdir", "use_dbus",
2440
"use_ipv6", "debuglevel", "restore", "statedir",
2441
"socket", "foreground", "zeroconf"):
2063
2442
value = getattr(options, option)
2064
2443
if value is not None:
2065
2444
server_settings[option] = value
2066
2445
del options
2067
2446
# Force all strings to be unicode
2068
2447
for option in server_settings.keys():
2069
if type(server_settings[option]) is str:
2070
server_settings[option] = unicode(server_settings[option])
2448
if isinstance(server_settings[option], bytes):
2449
server_settings[option] = (server_settings[option]
2450
.decode("utf-8"))
2451
# Force all boolean options to be boolean
2452
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2453
"foreground", "zeroconf"):
2454
server_settings[option] = bool(server_settings[option])
2455
# Debug implies foreground
2456
if server_settings["debug"]:
2457
server_settings["foreground"] = True
2071
2458
# Now we have our good server settings in "server_settings"
2072
2459
2073
2460
##################################################################
2074
2461
2462
if (not server_settings["zeroconf"]
2463
and not (server_settings["port"]
2464
or server_settings["socket"] != "")):
2465
parser.error("Needs port or socket to work without Zeroconf")
2466
2075
2467
# For convenience
2076
2468
debug = server_settings["debug"]
2077
2469
debuglevel = server_settings["debuglevel"]
2079
2471
use_ipv6 = server_settings["use_ipv6"]
2080
2472
stored_state_path = os.path.join(server_settings["statedir"],
2081
2473
stored_state_file)
2474
foreground = server_settings["foreground"]
2475
zeroconf = server_settings["zeroconf"]
2082
2476
2083
2477
if debug:
2084
2478
initlogger(debug, logging.DEBUG)
2090
2484
initlogger(debug, level)
2091
2485
2092
2486
if server_settings["servicename"] != "Mandos":
2093
syslogger.setFormatter(logging.Formatter
2094
('Mandos (%s) [%%(process)d]:'
2095
' %%(levelname)s: %%(message)s'
2096
% server_settings["servicename"]))
2487
syslogger.setFormatter(
2488
logging.Formatter('Mandos ({}) [%(process)d]:'
2489
' %(levelname)s: %(message)s'.format(
2490
server_settings["servicename"])))
2097
2491
2098
2492
# Parse config file with clients
2099
2493
client_config = configparser.SafeConfigParser(Client
2104
2498
global mandos_dbus_service
2105
2499
mandos_dbus_service = None
2106
2500
2107
tcp_server = MandosServer((server_settings["address"],
2108
server_settings["port"]),
2109
ClientHandler,
2110
interface=(server_settings["interface"]
2111
or None),
2112
use_ipv6=use_ipv6,
2113
gnutls_priority=
2114
server_settings["priority"],
2115
use_dbus=use_dbus)
2116
if not debug:
2117
pidfilename = "/var/run/mandos.pid"
2501
socketfd = None
2502
if server_settings["socket"] != "":
2503
socketfd = server_settings["socket"]
2504
tcp_server = MandosServer(
2505
(server_settings["address"], server_settings["port"]),
2506
ClientHandler,
2507
interface=(server_settings["interface"] or None),
2508
use_ipv6=use_ipv6,
2509
gnutls_priority=server_settings["priority"],
2510
use_dbus=use_dbus,
2511
socketfd=socketfd)
2512
if not foreground:
2513
pidfilename = "/run/mandos.pid"
2514
if not os.path.isdir("/run/."):
2515
pidfilename = "/var/run/mandos.pid"
2516
pidfile = None
2118
2517
try:
2119
pidfile = open(pidfilename, "w")
2120
except IOError:
2121
logger.error("Could not open file %r", pidfilename)
2518
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
2519
except IOError as e:
2520
logger.error("Could not open file %r", pidfilename,
2521
exc_info=e)
2122
2522
2123
try:
2124
uid = pwd.getpwnam("_mandos").pw_uid
2125
gid = pwd.getpwnam("_mandos").pw_gid
2126
except KeyError:
2523
for name in ("_mandos", "mandos", "nobody"):
2127
2524
try:
2128
uid = pwd.getpwnam("mandos").pw_uid
2129
gid = pwd.getpwnam("mandos").pw_gid
2525
uid = pwd.getpwnam(name).pw_uid
2526
gid = pwd.getpwnam(name).pw_gid
2527
break
2130
2528
except KeyError:
2131
try:
2132
uid = pwd.getpwnam("nobody").pw_uid
2133
gid = pwd.getpwnam("nobody").pw_gid
2134
except KeyError:
2135
uid = 65534
2136
gid = 65534
2529
continue
2530
else:
2531
uid = 65534
2532
gid = 65534
2137
2533
try:
2138
2534
os.setgid(gid)
2139
2535
os.setuid(uid)
2140
2536
except OSError as error:
2141
if error[0] != errno.EPERM:
2142
raise error
2537
if error.errno != errno.EPERM:
2538
raise
2143
2539
2144
2540
if debug:
2145
2541
# Enable all possible GnuTLS debugging
2152
2548
def debug_gnutls(level, string):
2153
2549
logger.debug("GnuTLS: %s", string[:-1])
2154
2550
2155
(gnutls.library.functions
2156
.gnutls_global_set_log_function(debug_gnutls))
2551
gnutls.library.functions.gnutls_global_set_log_function(
2552
debug_gnutls)
2157
2553
2158
2554
# Redirect stdin so all checkers get /dev/null
2159
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2555
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2160
2556
os.dup2(null, sys.stdin.fileno())
2161
2557
if null > 2:
2162
2558
os.close(null)
2163
2559
2164
2560
# Need to fork before connecting to D-Bus
2165
if not debug:
2561
if not foreground:
2166
2562
# Close all input and output, do double fork, etc.
2167
2563
daemon()
2168
2564
2565
# multiprocessing will use threads, so before we use gobject we
2566
# need to inform gobject that threads will be used.
2169
2567
gobject.threads_init()
2170
2568
2171
2569
global main_loop
2172
2570
# From the Avahi example code
2173
DBusGMainLoop(set_as_default=True )
2571
DBusGMainLoop(set_as_default=True)
2174
2572
main_loop = gobject.MainLoop()
2175
2573
bus = dbus.SystemBus()
2176
2574
# End of Avahi example code
2177
2575
if use_dbus:
2178
2576
try:
2179
2577
bus_name = dbus.service.BusName("se.recompile.Mandos",
2180
bus, do_not_queue=True)
2181
old_bus_name = (dbus.service.BusName
2182
("se.bsnet.fukt.Mandos", bus,
2183
do_not_queue=True))
2184
except dbus.exceptions.NameExistsException as e:
2185
logger.error(unicode(e) + ", disabling D-Bus")
2578
bus,
2579
do_not_queue=True)
2580
old_bus_name = dbus.service.BusName(
2581
"se.bsnet.fukt.Mandos", bus,
2582
do_not_queue=True)
2583
except dbus.exceptions.DBusException as e:
2584
logger.error("Disabling D-Bus:", exc_info=e)
2186
2585
use_dbus = False
2187
2586
server_settings["use_dbus"] = False
2188
2587
tcp_server.use_dbus = False
2189
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2190
service = AvahiServiceToSyslog(name =
2191
server_settings["servicename"],
2192
servicetype = "_mandos._tcp",
2193
protocol = protocol, bus = bus)
2194
if server_settings["interface"]:
2195
service.interface = (if_nametoindex
2196
(str(server_settings["interface"])))
2588
if zeroconf:
2589
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2590
service = AvahiServiceToSyslog(
2591
name = server_settings["servicename"],
2592
servicetype = "_mandos._tcp",
2593
protocol = protocol,
2594
bus = bus)
2595
if server_settings["interface"]:
2596
service.interface = if_nametoindex(
2597
server_settings["interface"].encode("utf-8"))
2197
2598
2198
2599
global multiprocessing_manager
2199
2600
multiprocessing_manager = multiprocessing.Manager()
2200
2601
2201
2602
client_class = Client
2202
2603
if use_dbus:
2203
client_class = functools.partial(ClientDBusTransitional,
2204
bus = bus)
2604
client_class = functools.partial(ClientDBus, bus = bus)
2205
2605
2206
2606
client_settings = Client.config_parser(client_config)
2207
2607
old_client_settings = {}
2208
2608
clients_data = {}
2209
2609
2610
# This is used to redirect stdout and stderr for checker processes
2611
global wnull
2612
wnull = open(os.devnull, "w") # A writable /dev/null
2613
# Only used if server is running in foreground but not in debug
2614
# mode
2615
if debug or not foreground:
2616
wnull.close()
2617
2210
2618
# Get client data and settings from last running state.
2211
2619
if server_settings["restore"]:
2212
2620
try:
2213
2621
with open(stored_state_path, "rb") as stored_state:
2214
clients_data, old_client_settings = (pickle.load
2215
(stored_state))
2622
clients_data, old_client_settings = pickle.load(
2623
stored_state)
2216
2624
os.remove(stored_state_path)
2217
2625
except IOError as e:
2218
logger.warning("Could not load persistent state: {0}"
2219
.format(e))
2220
if e.errno != errno.ENOENT:
2626
if e.errno == errno.ENOENT:
2627
logger.warning("Could not load persistent state:"
2628
" {}".format(os.strerror(e.errno)))
2629
else:
2630
logger.critical("Could not load persistent state:",
2631
exc_info=e)
2221
2632
raise
2222
2633
except EOFError as e:
2223
2634
logger.warning("Could not load persistent state: "
2224
"EOFError: {0}".format(e))
2635
"EOFError:",
2636
exc_info=e)
2225
2637
2226
2638
with PGPEngine() as pgp:
2227
for client_name, client in clients_data.iteritems():
2639
for client_name, client in clients_data.items():
2640
# Skip removed clients
2641
if client_name not in client_settings:
2642
continue
2643
2228
2644
# Decide which value to use after restoring saved state.
2229
2645
# We have three different values: Old config file,
2230
2646
# new config file, and saved state.
2235
2651
# For each value in new config, check if it
2236
2652
# differs from the old config value (Except for
2237
2653
# the "secret" attribute)
2238
if (name != "secret" and
2239
value != old_client_settings[client_name]
2240
[name]):
2654
if (name != "secret"
2655
and (value !=
2656
old_client_settings[client_name][name])):
2241
2657
client[name] = value
2242
2658
except KeyError:
2243
2659
pass
2244
2660
2245
2661
# Clients who has passed its expire date can still be
2246
# enabled if its last checker was successful. Clients
2662
# enabled if its last checker was successful. A Client
2247
2663
# whose checker succeeded before we stored its state is
2248
2664
# assumed to have successfully run all checkers during
2249
2665
# downtime.
2251
2667
if datetime.datetime.utcnow() >= client["expires"]:
2252
2668
if not client["last_checked_ok"]:
2253
2669
logger.warning(
2254
"disabling client {0} - Client never "
2255
"performed a successful checker"
2256
.format(client_name))
2670
"disabling client {} - Client never "
2671
"performed a successful checker".format(
2672
client_name))
2257
2673
client["enabled"] = False
2258
2674
elif client["last_checker_status"] != 0:
2259
2675
logger.warning(
2260
"disabling client {0} - Client "
2261
"last checker failed with error code {1}"
2262
.format(client_name,
2263
client["last_checker_status"]))
2676
"disabling client {} - Client last"
2677
" checker failed with error code"
2678
" {}".format(
2679
client_name,
2680
client["last_checker_status"]))
2264
2681
client["enabled"] = False
2265
2682
else:
2266
client["expires"] = (datetime.datetime
2267
.utcnow()
2268
+ client["timeout"])
2683
client["expires"] = (
2684
datetime.datetime.utcnow()
2685
+ client["timeout"])
2269
2686
logger.debug("Last checker succeeded,"
2270
" keeping {0} enabled"
2271
.format(client_name))
2687
" keeping {} enabled".format(
2688
client_name))
2272
2689
try:
2273
client["secret"] = (
2274
pgp.decrypt(client["encrypted_secret"],
2275
client_settings[client_name]
2276
["secret"]))
2690
client["secret"] = pgp.decrypt(
2691
client["encrypted_secret"],
2692
client_settings[client_name]["secret"])
2277
2693
except PGPError:
2278
2694
# If decryption fails, we use secret from new settings
2279
logger.debug("Failed to decrypt {0} old secret"
2280
.format(client_name))
2281
client["secret"] = (
2282
client_settings[client_name]["secret"])
2283
2695
logger.debug("Failed to decrypt {} old secret".format(
2696
client_name))
2697
client["secret"] = (client_settings[client_name]
2698
["secret"])
2284
2699
2285
2700
# Add/remove clients based on new changes made to config
2286
2701
for client_name in (set(old_client_settings)
2289
2704
for client_name in (set(client_settings)
2290
2705
- set(old_client_settings)):
2291
2706
clients_data[client_name] = client_settings[client_name]
2292
2707
2293
2708
# Create all client objects
2294
for client_name, client in clients_data.iteritems():
2709
for client_name, client in clients_data.items():
2295
2710
tcp_server.clients[client_name] = client_class(
2296
name = client_name, settings = client)
2711
name = client_name,
2712
settings = client,
2713
server_settings = server_settings)
2297
2714
2298
2715
if not tcp_server.clients:
2299
2716
logger.warning("No clients defined")
2300
2301
if not debug:
2302
try:
2303
with pidfile:
2304
pid = os.getpid()
2305
pidfile.write(str(pid) + "\n".encode("utf-8"))
2306
del pidfile
2307
except IOError:
2308
logger.error("Could not write to file %r with PID %d",
2309
pidfilename, pid)
2310
except NameError:
2311
# "pidfile" was never created
2312
pass
2717
2718
if not foreground:
2719
if pidfile is not None:
2720
pid = os.getpid()
2721
try:
2722
with pidfile:
2723
print(pid, file=pidfile)
2724
except IOError:
2725
logger.error("Could not write to file %r with PID %d",
2726
pidfilename, pid)
2727
del pidfile
2313
2728
del pidfilename
2314
signal.signal(signal.SIGINT, signal.SIG_IGN)
2315
2729
2316
2730
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2317
2731
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2318
2732
2319
2733
if use_dbus:
2320
class MandosDBusService(dbus.service.Object):
2734
2735
@alternate_dbus_interfaces(
2736
{ "se.recompile.Mandos": "se.bsnet.fukt.Mandos" })
2737
class MandosDBusService(DBusObjectWithProperties):
2321
2738
"""A D-Bus proxy object"""
2739
2322
2740
def __init__(self):
2323
2741
dbus.service.Object.__init__(self, bus, "/")
2742
2324
2743
_interface = "se.recompile.Mandos"
2325
2744
2745
@dbus_interface_annotations(_interface)
2746
def _foo(self):
2747
return {
2748
"org.freedesktop.DBus.Property.EmitsChangedSignal":
2749
"false" }
2750
2326
2751
@dbus.service.signal(_interface, signature="o")
2327
2752
def ClientAdded(self, objpath):
2328
2753
"D-Bus signal"
2341
2766
@dbus.service.method(_interface, out_signature="ao")
2342
2767
def GetAllClients(self):
2343
2768
"D-Bus method"
2344
return dbus.Array(c.dbus_object_path
2345
for c in
2769
return dbus.Array(c.dbus_object_path for c in
2346
2770
tcp_server.clients.itervalues())
2347
2771
2348
2772
@dbus.service.method(_interface,
2350
2774
def GetAllClientsWithProperties(self):
2351
2775
"D-Bus method"
2352
2776
return dbus.Dictionary(
2353
((c.dbus_object_path, c.GetAll(""))
2354
for c in tcp_server.clients.itervalues()),
2777
{ c.dbus_object_path: c.GetAll("")
2778
for c in tcp_server.clients.itervalues() },
2355
2779
signature="oa{sv}")
2356
2780
2357
2781
@dbus.service.method(_interface, in_signature="o")
2370
2794
2371
2795
del _interface
2372
2796
2373
class MandosDBusServiceTransitional(MandosDBusService):
2374
__metaclass__ = AlternateDBusNamesMetaclass
2375
mandos_dbus_service = MandosDBusServiceTransitional()
2797
mandos_dbus_service = MandosDBusService()
2376
2798
2377
2799
def cleanup():
2378
2800
"Cleanup function; run on exit"
2379
service.cleanup()
2801
if zeroconf:
2802
service.cleanup()
2380
2803
2381
2804
multiprocessing.active_children()
2805
wnull.close()
2382
2806
if not (tcp_server.clients or client_settings):
2383
2807
return
2384
2808
2395
2819
2396
2820
# A list of attributes that can not be pickled
2397
2821
# + secret.
2398
exclude = set(("bus", "changedstate", "secret",
2399
"checker"))
2400
for name, typ in (inspect.getmembers
2401
(dbus.service.Object)):
2822
exclude = { "bus", "changedstate", "secret",
2823
"checker", "server_settings" }
2824
for name, typ in inspect.getmembers(dbus.service
2825
.Object):
2402
2826
exclude.add(name)
2403
2827
2404
2828
client_dict["encrypted_secret"] = (client
2411
2835
del client_settings[client.name]["secret"]
2412
2836
2413
2837
try:
2414
tempfd, tempname = tempfile.mkstemp(suffix=".pickle",
2415
prefix="clients-",
2416
dir=os.path.dirname
2417
(stored_state_path))
2418
with os.fdopen(tempfd, "wb") as stored_state:
2838
with tempfile.NamedTemporaryFile(
2839
mode='wb',
2840
suffix=".pickle",
2841
prefix='clients-',
2842
dir=os.path.dirname(stored_state_path),
2843
delete=False) as stored_state:
2419
2844
pickle.dump((clients, client_settings), stored_state)
2845
tempname = stored_state.name
2420
2846
os.rename(tempname, stored_state_path)
2421
2847
except (IOError, OSError) as e:
2422
logger.warning("Could not save persistent state: {0}"
2423
.format(e))
2424
2848
if not debug:
2425
2849
try:
2426
2850
os.remove(tempname)
2427
2851
except NameError:
2428
2852
pass
2429
if e.errno not in set((errno.ENOENT, errno.EACCES,
2430
errno.EEXIST)):
2431
raise e
2853
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
2854
logger.warning("Could not save persistent state: {}"
2855
.format(os.strerror(e.errno)))
2856
else:
2857
logger.warning("Could not save persistent state:",
2858
exc_info=e)
2859
raise
2432
2860
2433
2861
# Delete all clients, and settings from config
2434
2862
while tcp_server.clients:
2439
2867
client.disable(quiet=True)
2440
2868
if use_dbus:
2441
2869
# Emit D-Bus signal
2442
mandos_dbus_service.ClientRemoved(client
2443
.dbus_object_path,
2444
client.name)
2870
mandos_dbus_service.ClientRemoved(
2871
client.dbus_object_path, client.name)
2445
2872
client_settings.clear()
2446
2873
2447
2874
atexit.register(cleanup)
2458
2885
tcp_server.server_activate()
2459
2886
2460
2887
# Find out what port we got
2461
service.port = tcp_server.socket.getsockname()[1]
2888
if zeroconf:
2889
service.port = tcp_server.socket.getsockname()[1]
2462
2890
if use_ipv6:
2463
2891
logger.info("Now listening on address %r, port %d,"
2464
" flowinfo %d, scope_id %d"
2465
% tcp_server.socket.getsockname())
2892
" flowinfo %d, scope_id %d",
2893
*tcp_server.socket.getsockname())
2466
2894
else: # IPv4
2467
logger.info("Now listening on address %r, port %d"
2468
% tcp_server.socket.getsockname())
2895
logger.info("Now listening on address %r, port %d",
2896
*tcp_server.socket.getsockname())
2469
2897
2470
2898
#service.interface = tcp_server.socket.getsockname()[3]
2471
2899
2472
2900
try:
2473
# From the Avahi example code
2474
try:
2475
service.activate()
2476
except dbus.exceptions.DBusException as error:
2477
logger.critical("DBusException: %s", error)
2478
cleanup()
2479
sys.exit(1)
2480
# End of Avahi example code
2901
if zeroconf:
2902
# From the Avahi example code
2903
try:
2904
service.activate()
2905
except dbus.exceptions.DBusException as error:
2906
logger.critical("D-Bus Exception", exc_info=error)
2907
cleanup()
2908
sys.exit(1)
2909
# End of Avahi example code
2481
2910
2482
2911
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2483
2912
lambda *args, **kwargs:
2487
2916
logger.debug("Starting main loop")
2488
2917
main_loop.run()
2489
2918
except AvahiError as error:
2490
logger.critical("AvahiError: %s", error)
2919
logger.critical("Avahi Error", exc_info=error)
2491
2920
cleanup()
2492
2921
sys.exit(1)
2493
2922
except KeyboardInterrupt:
2498
2927
# Must run before the D-Bus bus name gets deregistered
2499
2928
cleanup()
2500
2929
2930
2501
2931
if __name__ == '__main__':
2502
2932
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0