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- Committer: teddy at recompile
- Date: 2012-01-02 01:58:41 UTC
- mto: (237.7.109 trunk) (299.1.1 release) (300.1.1 release) (301.1.1 release)
- mto: This revision was merged to the branch mainline in revision 294.
- Revision ID: teddy@recompile.se-20120102015841-2krpl2epdhishtpg
* mandos: Consistent terminology; use the term "secret" for the
client's stored data.
(ClientDBus.__init__): Removed dead code.
(Clienthandler.handle): Bug fix: send NewRequest signal with only IP
address, not str() of address tuple.
client's stored data.
(ClientDBus.__init__): Removed dead code.
(Clienthandler.handle): Bug fix: send NewRequest signal with only IP
address, not str() of address tuple.
- files removed:
- debian/mandos-client.examples
- debian/upstream
- plugin-helpers
- files modified:
- .bzrignore
added
removed
mandos
1
#!/usr/bin/python2.7
1
#!/usr/bin/python
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 © 2008-2015 Teddy Hogeborn
15
# Copyright © 2008-2015 Björn Påhlsson
14
# Copyright © 2008-2012 Teddy Hogeborn
15
# Copyright © 2008-2012 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
from future_builtins import *
38
39
try:
40
import SocketServer as socketserver
41
except ImportError:
42
import socketserver
37
import SocketServer as socketserver
43
38
import socket
44
39
import argparse
45
40
import datetime
50
45
import gnutls.library.functions
51
46
import gnutls.library.constants
52
47
import gnutls.library.types
53
try:
54
import ConfigParser as configparser
55
except ImportError:
56
import configparser
48
import ConfigParser as configparser
57
49
import sys
58
50
import re
59
51
import os
68
60
import struct
69
61
import fcntl
70
62
import functools
71
try:
72
import cPickle as pickle
73
except ImportError:
74
import pickle
63
import cPickle as pickle
75
64
import multiprocessing
76
65
import types
77
66
import binascii
78
67
import tempfile
79
import itertools
80
import collections
81
import codecs
82
68
83
69
import dbus
84
70
import dbus.service
85
try:
86
import gobject
87
except ImportError:
88
from gi.repository import GObject as gobject
71
import gobject
89
72
import avahi
90
73
from dbus.mainloop.glib import DBusGMainLoop
91
74
import ctypes
92
75
import ctypes.util
93
76
import xml.dom.minidom
94
77
import inspect
78
import GnuPGInterface
95
79
96
80
try:
97
81
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
101
85
except ImportError:
102
86
SO_BINDTODEVICE = None
103
87
104
if sys.version_info.major == 2:
105
str = unicode
106
107
version = "1.6.9"
88
version = "1.5.1"
108
89
stored_state_file = "clients.pickle"
109
90
110
91
logger = logging.getLogger()
111
syslogger = None
92
syslogger = (logging.handlers.SysLogHandler
93
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
94
address = str("/dev/log")))
112
95
113
96
try:
114
if_nametoindex = ctypes.cdll.LoadLibrary(
115
ctypes.util.find_library("c")).if_nametoindex
97
if_nametoindex = (ctypes.cdll.LoadLibrary
98
(ctypes.util.find_library("c"))
99
.if_nametoindex)
116
100
except (OSError, AttributeError):
117
118
101
def if_nametoindex(interface):
119
102
"Get an interface index the hard way, i.e. using fcntl()"
120
103
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
121
104
with contextlib.closing(socket.socket()) as s:
122
105
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
123
struct.pack(b"16s16x", interface))
124
interface_index = struct.unpack("I", ifreq[16:20])[0]
106
struct.pack(str("16s16x"),
107
interface))
108
interface_index = struct.unpack(str("I"),
109
ifreq[16:20])[0]
125
110
return interface_index
126
111
127
112
128
113
def initlogger(debug, level=logging.WARNING):
129
114
"""init logger and add loglevel"""
130
115
131
global syslogger
132
syslogger = (logging.handlers.SysLogHandler(
133
facility = logging.handlers.SysLogHandler.LOG_DAEMON,
134
address = "/dev/log"))
135
116
syslogger.setFormatter(logging.Formatter
136
117
('Mandos [%(process)d]: %(levelname)s:'
137
118
' %(message)s'))
154
135
155
136
class PGPEngine(object):
156
137
"""A simple class for OpenPGP symmetric encryption & decryption"""
157
158
138
def __init__(self):
139
self.gnupg = GnuPGInterface.GnuPG()
159
140
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
160
self.gnupgargs = ['--batch',
161
'--home', self.tempdir,
162
'--force-mdc',
163
'--quiet',
164
'--no-use-agent']
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'])
165
147
166
148
def __enter__(self):
167
149
return self
168
150
169
def __exit__(self, exc_type, exc_value, traceback):
151
def __exit__ (self, exc_type, exc_value, traceback):
170
152
self._cleanup()
171
153
return False
172
154
189
171
def password_encode(self, password):
190
172
# Passphrase can not be empty and can not contain newlines or
191
173
# NUL bytes. So we prefix it and hex encode it.
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
174
return b"mandos" + binascii.hexlify(password)
199
175
200
176
def encrypt(self, data, password):
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)
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
216
191
return ciphertext
217
192
218
193
def decrypt(self, data, password):
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)
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
234
208
return decrypted_plaintext
235
209
236
210
211
237
212
class AvahiError(Exception):
238
213
def __init__(self, value, *args, **kwargs):
239
214
self.value = value
240
return super(AvahiError, self).__init__(value, *args,
241
**kwargs)
242
215
super(AvahiError, self).__init__(value, *args, **kwargs)
216
def __unicode__(self):
217
return unicode(repr(self.value))
243
218
244
219
class AvahiServiceError(AvahiError):
245
220
pass
246
221
247
248
222
class AvahiGroupError(AvahiError):
249
223
pass
250
224
257
231
Used to optionally bind to the specified interface.
258
232
name: string; Example: 'Mandos'
259
233
type: string; Example: '_mandos._tcp'.
260
See <https://www.iana.org/assignments/service-names-port-numbers>
234
See <http://www.dns-sd.org/ServiceTypes.html>
261
235
port: integer; what port to announce
262
236
TXT: list of strings; TXT record for the service
263
237
domain: string; Domain to publish on, default to .local if empty.
269
243
server: D-Bus Server
270
244
bus: dbus.SystemBus()
271
245
"""
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):
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):
284
250
self.interface = interface
285
251
self.name = name
286
252
self.type = servicetype
295
261
self.server = None
296
262
self.bus = bus
297
263
self.entry_group_state_changed_match = None
298
299
def rename(self, remove=True):
264
def rename(self):
300
265
"""Derived from the Avahi example code"""
301
266
if self.rename_count >= self.max_renames:
302
267
logger.critical("No suitable Zeroconf service name found"
303
268
" after %i retries, exiting.",
304
269
self.rename_count)
305
270
raise AvahiServiceError("Too many renames")
306
self.name = str(
307
self.server.GetAlternativeServiceName(self.name))
308
self.rename_count += 1
271
self.name = unicode(self.server
272
.GetAlternativeServiceName(self.name))
309
273
logger.info("Changing Zeroconf service name to %r ...",
310
274
self.name)
311
if remove:
312
self.remove()
275
self.remove()
313
276
try:
314
277
self.add()
315
278
except dbus.exceptions.DBusException as error:
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
279
logger.critical("DBusException: %s", error)
280
self.cleanup()
281
os._exit(1)
282
self.rename_count += 1
325
283
def remove(self):
326
284
"""Derived from the Avahi example code"""
327
285
if self.entry_group_state_changed_match is not None:
329
287
self.entry_group_state_changed_match = None
330
288
if self.group is not None:
331
289
self.group.Reset()
332
333
290
def add(self):
334
291
"""Derived from the Avahi example code"""
335
292
self.remove()
352
309
dbus.UInt16(self.port),
353
310
avahi.string_array_to_txt_array(self.TXT))
354
311
self.group.Commit()
355
356
312
def entry_group_state_changed(self, state, error):
357
313
"""Derived from the Avahi example code"""
358
314
logger.debug("Avahi entry group state change: %i", state)
364
320
self.rename()
365
321
elif state == avahi.ENTRY_GROUP_FAILURE:
366
322
logger.critical("Avahi: Error in group state changed %s",
367
str(error))
368
raise AvahiGroupError("State changed: {!s}".format(error))
369
323
unicode(error))
324
raise AvahiGroupError("State changed: %s"
325
% unicode(error))
370
326
def cleanup(self):
371
327
"""Derived from the Avahi example code"""
372
328
if self.group is not None:
377
333
pass
378
334
self.group = None
379
335
self.remove()
380
381
336
def server_state_changed(self, state, error=None):
382
337
"""Derived from the Avahi example code"""
383
338
logger.debug("Avahi server state change: %i", state)
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
}
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" }
390
346
if state in bad_states:
391
347
if bad_states[state] is not None:
392
348
if error is None:
401
357
logger.debug("Unknown state: %r", state)
402
358
else:
403
359
logger.debug("Unknown state: %r: %r", state, error)
404
405
360
def activate(self):
406
361
"""Derived from the Avahi example code"""
407
362
if self.server is None:
411
366
follow_name_owner_changes=True),
412
367
avahi.DBUS_INTERFACE_SERVER)
413
368
self.server.connect_to_signal("StateChanged",
414
self.server_state_changed)
369
self.server_state_changed)
415
370
self.server_state_changed(self.server.GetState())
416
371
417
418
372
class AvahiServiceToSyslog(AvahiService):
419
def rename(self, *args, **kwargs):
373
def rename(self):
420
374
"""Add the new name to the syslog messages"""
421
ret = AvahiService.rename(self, *args, **kwargs)
422
syslogger.setFormatter(logging.Formatter(
423
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
424
.format(self.name)))
375
ret = AvahiService.rename(self)
376
syslogger.setFormatter(logging.Formatter
377
('Mandos (%s) [%%(process)d]:'
378
' %%(levelname)s: %%(message)s'
379
% self.name))
425
380
return ret
426
381
427
def call_pipe(connection, # : multiprocessing.Connection
428
func, *args, **kwargs):
429
"""This function is meant to be called by multiprocessing.Process
430
431
This function runs func(*args, **kwargs), and writes the resulting
432
return value on the provided multiprocessing.Connection.
433
"""
434
connection.send(func(*args, **kwargs))
435
connection.close()
436
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
437
388
class Client(object):
438
389
"""A representation of a client host served by this server.
439
390
464
415
last_checked_ok: datetime.datetime(); (UTC) or None
465
416
last_checker_status: integer between 0 and 255 reflecting exit
466
417
status of last checker. -1 reflects crashed
467
checker, -2 means no checker completed yet.
468
last_checker_signal: The signal which killed the last checker, if
469
last_checker_status is -1
418
checker, or None.
470
419
last_enabled: datetime.datetime(); (UTC) or None
471
420
name: string; from the config file, used in log messages and
472
421
D-Bus identifiers
477
426
runtime_expansions: Allowed attributes for runtime expansion.
478
427
expires: datetime.datetime(); time (UTC) when a client will be
479
428
disabled, or None
480
server_settings: The server_settings dict from main()
481
429
"""
482
430
483
431
runtime_expansions = ("approval_delay", "approval_duration",
484
"created", "enabled", "expires",
485
"fingerprint", "host", "interval",
486
"last_approval_request", "last_checked_ok",
432
"created", "enabled", "fingerprint",
433
"host", "interval", "last_checked_ok",
487
434
"last_enabled", "name", "timeout")
488
client_defaults = {
489
"timeout": "PT5M",
490
"extended_timeout": "PT15M",
491
"interval": "PT2M",
492
"checker": "fping -q -- %%(host)s",
493
"host": "",
494
"approval_delay": "PT0S",
495
"approval_duration": "PT1S",
496
"approved_by_default": "True",
497
"enabled": "True",
498
}
499
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
500
461
@staticmethod
501
462
def config_parser(config):
502
463
"""Construct a new dict of client settings of this form:
517
478
client["enabled"] = config.getboolean(client_name,
518
479
"enabled")
519
480
520
# Uppercase and remove spaces from fingerprint for later
521
# comparison purposes with return value from the
522
# fingerprint() function
523
481
client["fingerprint"] = (section["fingerprint"].upper()
524
482
.replace(" ", ""))
525
483
if "secret" in section:
530
488
"rb") as secfile:
531
489
client["secret"] = secfile.read()
532
490
else:
533
raise TypeError("No secret or secfile for section {}"
534
.format(section))
491
raise TypeError("No secret or secfile for section %s"
492
% section)
535
493
client["timeout"] = string_to_delta(section["timeout"])
536
494
client["extended_timeout"] = string_to_delta(
537
495
section["extended_timeout"])
543
501
client["checker_command"] = section["checker"]
544
502
client["last_approval_request"] = None
545
503
client["last_checked_ok"] = None
546
client["last_checker_status"] = -2
504
client["last_checker_status"] = None
547
505
548
506
return settings
549
550
def __init__(self, settings, name = None, server_settings=None):
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."""
551
513
self.name = name
552
if server_settings is None:
553
server_settings = {}
554
self.server_settings = server_settings
555
514
# adding all client settings
556
for setting, value in settings.items():
515
for setting, value in settings.iteritems():
557
516
setattr(self, setting, value)
558
517
559
518
if self.enabled:
565
524
else:
566
525
self.last_enabled = None
567
526
self.expires = None
568
527
569
528
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
570
532
logger.debug(" Fingerprint: %s", self.fingerprint)
571
533
self.created = settings.get("created",
572
534
datetime.datetime.utcnow())
573
535
574
536
# attributes specific for this server instance
575
537
self.checker = None
576
538
self.checker_initiator_tag = None
579
541
self.current_checker_command = None
580
542
self.approved = None
581
543
self.approvals_pending = 0
582
self.changedstate = multiprocessing_manager.Condition(
583
multiprocessing_manager.Lock())
584
self.client_structure = [attr
585
for attr in self.__dict__.iterkeys()
544
self.changedstate = (multiprocessing_manager
545
.Condition(multiprocessing_manager
546
.Lock()))
547
self.client_structure = [attr for attr in
548
self.__dict__.iterkeys()
586
549
if not attr.startswith("_")]
587
550
self.client_structure.append("client_structure")
588
551
589
for name, t in inspect.getmembers(
590
type(self), lambda obj: isinstance(obj, property)):
552
for name, t in inspect.getmembers(type(self),
553
lambda obj:
554
isinstance(obj,
555
property)):
591
556
if not name.startswith("_"):
592
557
self.client_structure.append(name)
593
558
601
566
if getattr(self, "enabled", False):
602
567
# Already enabled
603
568
return
569
self.send_changedstate()
604
570
self.expires = datetime.datetime.utcnow() + self.timeout
605
571
self.enabled = True
606
572
self.last_enabled = datetime.datetime.utcnow()
607
573
self.init_checker()
608
self.send_changedstate()
609
574
610
575
def disable(self, quiet=True):
611
576
"""Disable this client."""
612
577
if not getattr(self, "enabled", False):
613
578
return False
614
579
if not quiet:
580
self.send_changedstate()
581
if not quiet:
615
582
logger.info("Disabling client %s", self.name)
616
if getattr(self, "disable_initiator_tag", None) is not None:
583
if getattr(self, "disable_initiator_tag", False):
617
584
gobject.source_remove(self.disable_initiator_tag)
618
585
self.disable_initiator_tag = None
619
586
self.expires = None
620
if getattr(self, "checker_initiator_tag", None) is not None:
587
if getattr(self, "checker_initiator_tag", False):
621
588
gobject.source_remove(self.checker_initiator_tag)
622
589
self.checker_initiator_tag = None
623
590
self.stop_checker()
624
591
self.enabled = False
625
if not quiet:
626
self.send_changedstate()
627
592
# Do not run this again if called by a gobject.timeout_add
628
593
return False
629
594
633
598
def init_checker(self):
634
599
# Schedule a new checker to be started an 'interval' from now,
635
600
# and every interval from then on.
636
if self.checker_initiator_tag is not None:
637
gobject.source_remove(self.checker_initiator_tag)
638
self.checker_initiator_tag = gobject.timeout_add(
639
int(self.interval.total_seconds() * 1000),
640
self.start_checker)
601
self.checker_initiator_tag = (gobject.timeout_add
602
(self.interval_milliseconds(),
603
self.start_checker))
641
604
# Schedule a disable() when 'timeout' has passed
642
if self.disable_initiator_tag is not None:
643
gobject.source_remove(self.disable_initiator_tag)
644
self.disable_initiator_tag = gobject.timeout_add(
645
int(self.timeout.total_seconds() * 1000), self.disable)
605
self.disable_initiator_tag = (gobject.timeout_add
606
(self.timeout_milliseconds(),
607
self.disable))
646
608
# Also start a new checker *right now*.
647
609
self.start_checker()
648
610
649
def checker_callback(self, source, condition, connection,
650
command):
611
def checker_callback(self, pid, condition, command):
651
612
"""The checker has completed, so take appropriate actions."""
652
613
self.checker_callback_tag = None
653
614
self.checker = None
654
# Read return code from connection (see call_pipe)
655
returncode = connection.recv()
656
connection.close()
657
658
if returncode >= 0:
659
self.last_checker_status = returncode
660
self.last_checker_signal = None
615
if os.WIFEXITED(condition):
616
self.last_checker_status = os.WEXITSTATUS(condition)
661
617
if self.last_checker_status == 0:
662
618
logger.info("Checker for %(name)s succeeded",
663
619
vars(self))
664
620
self.checked_ok()
665
621
else:
666
logger.info("Checker for %(name)s failed", vars(self))
622
logger.info("Checker for %(name)s failed",
623
vars(self))
667
624
else:
668
625
self.last_checker_status = -1
669
self.last_checker_signal = -returncode
670
626
logger.warning("Checker for %(name)s crashed?",
671
627
vars(self))
672
return False
673
674
def checked_ok(self):
675
"""Assert that the client has been seen, alive and well."""
676
self.last_checked_ok = datetime.datetime.utcnow()
677
self.last_checker_status = 0
678
self.last_checker_signal = None
679
self.bump_timeout()
680
681
def bump_timeout(self, timeout=None):
682
"""Bump up the timeout for this client."""
628
629
def checked_ok(self, timeout=None):
630
"""Bump up the timeout for this client.
631
632
This should only be called when the client has been seen,
633
alive and well.
634
"""
683
635
if timeout is None:
684
636
timeout = self.timeout
637
self.last_checked_ok = datetime.datetime.utcnow()
685
638
if self.disable_initiator_tag is not None:
686
639
gobject.source_remove(self.disable_initiator_tag)
687
self.disable_initiator_tag = None
688
640
if getattr(self, "enabled", False):
689
self.disable_initiator_tag = gobject.timeout_add(
690
int(timeout.total_seconds() * 1000), self.disable)
641
self.disable_initiator_tag = (gobject.timeout_add
642
(timedelta_to_milliseconds
643
(timeout), self.disable))
691
644
self.expires = datetime.datetime.utcnow() + timeout
692
645
693
646
def need_approval(self):
699
652
If a checker already exists, leave it running and do
700
653
nothing."""
701
654
# The reason for not killing a running checker is that if we
702
# did that, and if a checker (for some reason) started running
703
# slowly and taking more than 'interval' time, then the client
704
# would inevitably timeout, since no checker would get a
705
# chance to run to completion. If we instead leave running
655
# did that, then if a checker (for some reason) started
656
# running slowly and taking more than 'interval' time, the
657
# client would inevitably timeout, since no checker would get
658
# a chance to run to completion. If we instead leave running
706
659
# checkers alone, the checker would have to take more time
707
660
# than 'timeout' for the client to be disabled, which is as it
708
661
# should be.
709
662
710
if self.checker is not None and not self.checker.is_alive():
711
logger.warning("Checker was not alive; joining")
712
self.checker.join()
713
self.checker = None
663
# If a checker exists, make sure it is not a zombie
664
try:
665
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
666
except (AttributeError, OSError) as error:
667
if (isinstance(error, OSError)
668
and error.errno != errno.ECHILD):
669
raise error
670
else:
671
if pid:
672
logger.warning("Checker was a zombie")
673
gobject.source_remove(self.checker_callback_tag)
674
self.checker_callback(pid, status,
675
self.current_checker_command)
714
676
# Start a new checker if needed
715
677
if self.checker is None:
716
# Escape attributes for the shell
717
escaped_attrs = {
718
attr: re.escape(str(getattr(self, attr)))
719
for attr in self.runtime_expansions }
720
678
try:
721
command = self.checker_command % escaped_attrs
722
except TypeError as error:
723
logger.error('Could not format string "%s"',
724
self.checker_command,
725
exc_info=error)
726
return True # Try again later
679
# In case checker_command has exactly one % operator
680
command = self.checker_command % self.host
681
except TypeError:
682
# Escape attributes for the shell
683
escaped_attrs = dict(
684
(attr,
685
re.escape(unicode(str(getattr(self, attr, "")),
686
errors=
687
'replace')))
688
for attr in
689
self.runtime_expansions)
690
691
try:
692
command = self.checker_command % escaped_attrs
693
except TypeError as error:
694
logger.error('Could not format string "%s":'
695
' %s', self.checker_command, error)
696
return True # Try again later
727
697
self.current_checker_command = command
728
logger.info("Starting checker %r for %s", command,
729
self.name)
730
# We don't need to redirect stdout and stderr, since
731
# in normal mode, that is already done by daemon(),
732
# and in debug mode we don't want to. (Stdin is
733
# always replaced by /dev/null.)
734
# The exception is when not debugging but nevertheless
735
# running in the foreground; use the previously
736
# created wnull.
737
popen_args = { "close_fds": True,
738
"shell": True,
739
"cwd": "/" }
740
if (not self.server_settings["debug"]
741
and self.server_settings["foreground"]):
742
popen_args.update({"stdout": wnull,
743
"stderr": wnull })
744
pipe = multiprocessing.Pipe(duplex = False)
745
self.checker = multiprocessing.Process(
746
target = call_pipe,
747
args = (pipe[1], subprocess.call, command),
748
kwargs = popen_args)
749
self.checker.start()
750
self.checker_callback_tag = gobject.io_add_watch(
751
pipe[0].fileno(), gobject.IO_IN,
752
self.checker_callback, pipe[0], command)
698
try:
699
logger.info("Starting checker %r for %s",
700
command, self.name)
701
# We don't need to redirect stdout and stderr, since
702
# in normal mode, that is already done by daemon(),
703
# and in debug mode we don't want to. (Stdin is
704
# always replaced by /dev/null.)
705
self.checker = subprocess.Popen(command,
706
close_fds=True,
707
shell=True, cwd="/")
708
self.checker_callback_tag = (gobject.child_watch_add
709
(self.checker.pid,
710
self.checker_callback,
711
data=command))
712
# The checker may have completed before the gobject
713
# watch was added. Check for this.
714
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
715
if pid:
716
gobject.source_remove(self.checker_callback_tag)
717
self.checker_callback(pid, status, command)
718
except OSError as error:
719
logger.error("Failed to start subprocess: %s",
720
error)
753
721
# Re-run this periodically if run by gobject.timeout_add
754
722
return True
755
723
761
729
if getattr(self, "checker", None) is None:
762
730
return
763
731
logger.debug("Stopping checker for %(name)s", vars(self))
764
self.checker.terminate()
732
try:
733
os.kill(self.checker.pid, signal.SIGTERM)
734
#time.sleep(0.5)
735
#if self.checker.poll() is None:
736
# os.kill(self.checker.pid, signal.SIGKILL)
737
except OSError as error:
738
if error.errno != errno.ESRCH: # No such process
739
raise
765
740
self.checker = None
766
741
767
742
768
def dbus_service_property(dbus_interface,
769
signature="v",
770
access="readwrite",
771
byte_arrays=False):
743
def dbus_service_property(dbus_interface, signature="v",
744
access="readwrite", byte_arrays=False):
772
745
"""Decorators for marking methods of a DBusObjectWithProperties to
773
746
become properties on the D-Bus.
774
747
783
756
# "Set" method, so we fail early here:
784
757
if byte_arrays and signature != "ay":
785
758
raise ValueError("Byte arrays not supported for non-'ay'"
786
" signature {!r}".format(signature))
787
759
" signature %r" % signature)
788
760
def decorator(func):
789
761
func._dbus_is_property = True
790
762
func._dbus_interface = dbus_interface
795
767
func._dbus_name = func._dbus_name[:-14]
796
768
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
797
769
return func
798
799
return decorator
800
801
802
def dbus_interface_annotations(dbus_interface):
803
"""Decorator for marking functions returning interface annotations
804
805
Usage:
806
807
@dbus_interface_annotations("org.example.Interface")
808
def _foo(self): # Function name does not matter
809
return {"org.freedesktop.DBus.Deprecated": "true",
810
"org.freedesktop.DBus.Property.EmitsChangedSignal":
811
"false"}
812
"""
813
814
def decorator(func):
815
func._dbus_is_interface = True
816
func._dbus_interface = dbus_interface
817
func._dbus_name = dbus_interface
818
return func
819
820
return decorator
821
822
823
def dbus_annotations(annotations):
824
"""Decorator to annotate D-Bus methods, signals or properties
825
Usage:
826
827
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
828
"org.freedesktop.DBus.Property."
829
"EmitsChangedSignal": "false"})
830
@dbus_service_property("org.example.Interface", signature="b",
831
access="r")
832
def Property_dbus_property(self):
833
return dbus.Boolean(False)
834
"""
835
836
def decorator(func):
837
func._dbus_annotations = annotations
838
return func
839
840
770
return decorator
841
771
842
772
843
773
class DBusPropertyException(dbus.exceptions.DBusException):
844
774
"""A base class for D-Bus property-related exceptions
845
775
"""
846
pass
776
def __unicode__(self):
777
return unicode(str(self))
847
778
848
779
849
780
class DBusPropertyAccessException(DBusPropertyException):
867
798
"""
868
799
869
800
@staticmethod
870
def _is_dbus_thing(thing):
871
"""Returns a function testing if an attribute is a D-Bus thing
872
873
If called like _is_dbus_thing("method") it returns a function
874
suitable for use as predicate to inspect.getmembers().
875
"""
876
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
877
False)
801
def _is_dbus_property(obj):
802
return getattr(obj, "_dbus_is_property", False)
878
803
879
def _get_all_dbus_things(self, thing):
804
def _get_all_dbus_properties(self):
880
805
"""Returns a generator of (name, attribute) pairs
881
806
"""
882
return ((getattr(athing.__get__(self), "_dbus_name", name),
883
athing.__get__(self))
807
return ((prop.__get__(self)._dbus_name, prop.__get__(self))
884
808
for cls in self.__class__.__mro__
885
for name, athing in
886
inspect.getmembers(cls, self._is_dbus_thing(thing)))
809
for name, prop in
810
inspect.getmembers(cls, self._is_dbus_property))
887
811
888
812
def _get_dbus_property(self, interface_name, property_name):
889
813
"""Returns a bound method if one exists which is a D-Bus
890
814
property with the specified name and interface.
891
815
"""
892
for cls in self.__class__.__mro__:
893
for name, value in inspect.getmembers(
894
cls, self._is_dbus_thing("property")):
816
for cls in self.__class__.__mro__:
817
for name, value in (inspect.getmembers
818
(cls, self._is_dbus_property)):
895
819
if (value._dbus_name == property_name
896
820
and value._dbus_interface == interface_name):
897
821
return value.__get__(self)
898
822
899
823
# No such property
900
raise DBusPropertyNotFound("{}:{}.{}".format(
901
self.dbus_object_path, interface_name, property_name))
824
raise DBusPropertyNotFound(self.dbus_object_path + ":"
825
+ interface_name + "."
826
+ property_name)
902
827
903
@dbus.service.method(dbus.PROPERTIES_IFACE,
904
in_signature="ss",
828
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
905
829
out_signature="v")
906
830
def Get(self, interface_name, property_name):
907
831
"""Standard D-Bus property Get() method, see D-Bus standard.
925
849
# The byte_arrays option is not supported yet on
926
850
# signatures other than "ay".
927
851
if prop._dbus_signature != "ay":
928
raise ValueError("Byte arrays not supported for non-"
929
"'ay' signature {!r}"
930
.format(prop._dbus_signature))
852
raise ValueError
931
853
value = dbus.ByteArray(b''.join(chr(byte)
932
854
for byte in value))
933
855
prop(value)
934
856
935
@dbus.service.method(dbus.PROPERTIES_IFACE,
936
in_signature="s",
857
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
937
858
out_signature="a{sv}")
938
859
def GetAll(self, interface_name):
939
860
"""Standard D-Bus property GetAll() method, see D-Bus
942
863
Note: Will not include properties with access="write".
943
864
"""
944
865
properties = {}
945
for name, prop in self._get_all_dbus_things("property"):
866
for name, prop in self._get_all_dbus_properties():
946
867
if (interface_name
947
868
and interface_name != prop._dbus_interface):
948
869
# Interface non-empty but did not match
954
875
if not hasattr(value, "variant_level"):
955
876
properties[name] = value
956
877
continue
957
properties[name] = type(value)(
958
value, variant_level = value.variant_level + 1)
878
properties[name] = type(value)(value, variant_level=
879
value.variant_level+1)
959
880
return dbus.Dictionary(properties, signature="sv")
960
881
961
@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
962
def PropertiesChanged(self, interface_name, changed_properties,
963
invalidated_properties):
964
"""Standard D-Bus PropertiesChanged() signal, see D-Bus
965
standard.
966
"""
967
pass
968
969
882
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
970
883
out_signature="s",
971
884
path_keyword='object_path',
972
885
connection_keyword='connection')
973
886
def Introspect(self, object_path, connection):
974
"""Overloading of standard D-Bus method.
975
976
Inserts property tags and interface annotation tags.
887
"""Standard D-Bus method, overloaded to insert property tags.
977
888
"""
978
889
xmlstring = dbus.service.Object.Introspect(self, object_path,
979
890
connection)
980
891
try:
981
892
document = xml.dom.minidom.parseString(xmlstring)
982
983
893
def make_tag(document, name, prop):
984
894
e = document.createElement("property")
985
895
e.setAttribute("name", name)
986
896
e.setAttribute("type", prop._dbus_signature)
987
897
e.setAttribute("access", prop._dbus_access)
988
898
return e
989
990
899
for if_tag in document.getElementsByTagName("interface"):
991
# Add property tags
992
900
for tag in (make_tag(document, name, prop)
993
901
for name, prop
994
in self._get_all_dbus_things("property")
902
in self._get_all_dbus_properties()
995
903
if prop._dbus_interface
996
904
== if_tag.getAttribute("name")):
997
905
if_tag.appendChild(tag)
998
# Add annotation tags
999
for typ in ("method", "signal", "property"):
1000
for tag in if_tag.getElementsByTagName(typ):
1001
annots = dict()
1002
for name, prop in (self.
1003
_get_all_dbus_things(typ)):
1004
if (name == tag.getAttribute("name")
1005
and prop._dbus_interface
1006
== if_tag.getAttribute("name")):
1007
annots.update(getattr(
1008
prop, "_dbus_annotations", {}))
1009
for name, value in annots.items():
1010
ann_tag = document.createElement(
1011
"annotation")
1012
ann_tag.setAttribute("name", name)
1013
ann_tag.setAttribute("value", value)
1014
tag.appendChild(ann_tag)
1015
# Add interface annotation tags
1016
for annotation, value in dict(
1017
itertools.chain.from_iterable(
1018
annotations().items()
1019
for name, annotations
1020
in self._get_all_dbus_things("interface")
1021
if name == if_tag.getAttribute("name")
1022
)).items():
1023
ann_tag = document.createElement("annotation")
1024
ann_tag.setAttribute("name", annotation)
1025
ann_tag.setAttribute("value", value)
1026
if_tag.appendChild(ann_tag)
1027
906
# Add the names to the return values for the
1028
907
# "org.freedesktop.DBus.Properties" methods
1029
908
if (if_tag.getAttribute("name")
1044
923
except (AttributeError, xml.dom.DOMException,
1045
924
xml.parsers.expat.ExpatError) as error:
1046
925
logger.error("Failed to override Introspection method",
1047
exc_info=error)
926
error)
1048
927
return xmlstring
1049
928
1050
929
1051
def datetime_to_dbus(dt, variant_level=0):
930
def datetime_to_dbus (dt, variant_level=0):
1052
931
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1053
932
if dt is None:
1054
933
return dbus.String("", variant_level = variant_level)
1055
return dbus.String(dt.isoformat(), variant_level=variant_level)
1056
1057
1058
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1059
"""A class decorator; applied to a subclass of
1060
dbus.service.Object, it will add alternate D-Bus attributes with
1061
interface names according to the "alt_interface_names" mapping.
1062
Usage:
1063
1064
@alternate_dbus_interfaces({"org.example.Interface":
1065
"net.example.AlternateInterface"})
1066
class SampleDBusObject(dbus.service.Object):
1067
@dbus.service.method("org.example.Interface")
1068
def SampleDBusMethod():
1069
pass
1070
1071
The above "SampleDBusMethod" on "SampleDBusObject" will be
1072
reachable via two interfaces: "org.example.Interface" and
1073
"net.example.AlternateInterface", the latter of which will have
1074
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1075
"true", unless "deprecate" is passed with a False value.
1076
1077
This works for methods and signals, and also for D-Bus properties
1078
(from DBusObjectWithProperties) and interfaces (from the
1079
dbus_interface_annotations decorator).
934
return dbus.String(dt.isoformat(),
935
variant_level=variant_level)
936
937
938
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
939
.__metaclass__):
940
"""Applied to an empty subclass of a D-Bus object, this metaclass
941
will add additional D-Bus attributes matching a certain pattern.
1080
942
"""
1081
1082
def wrapper(cls):
1083
for orig_interface_name, alt_interface_name in (
1084
alt_interface_names.items()):
1085
attr = {}
1086
interface_names = set()
1087
# Go though all attributes of the class
1088
for attrname, attribute in inspect.getmembers(cls):
943
def __new__(mcs, name, bases, attr):
944
# Go through all the base classes which could have D-Bus
945
# methods, signals, or properties in them
946
for base in (b for b in bases
947
if issubclass(b, dbus.service.Object)):
948
# Go though all attributes of the base class
949
for attrname, attribute in inspect.getmembers(base):
1089
950
# Ignore non-D-Bus attributes, and D-Bus attributes
1090
951
# with the wrong interface name
1091
952
if (not hasattr(attribute, "_dbus_interface")
1092
or not attribute._dbus_interface.startswith(
1093
orig_interface_name)):
953
or not attribute._dbus_interface
954
.startswith("se.recompile.Mandos")):
1094
955
continue
1095
956
# Create an alternate D-Bus interface name based on
1096
957
# the current name
1097
alt_interface = attribute._dbus_interface.replace(
1098
orig_interface_name, alt_interface_name)
1099
interface_names.add(alt_interface)
958
alt_interface = (attribute._dbus_interface
959
.replace("se.recompile.Mandos",
960
"se.bsnet.fukt.Mandos"))
1100
961
# Is this a D-Bus signal?
1101
962
if getattr(attribute, "_dbus_is_signal", False):
1102
if sys.version_info.major == 2:
1103
# Extract the original non-method undecorated
1104
# function by black magic
1105
nonmethod_func = (dict(
963
# Extract the original non-method function by
964
# black magic
965
nonmethod_func = (dict(
1106
966
zip(attribute.func_code.co_freevars,
1107
attribute.__closure__))
1108
["func"].cell_contents)
1109
else:
1110
nonmethod_func = attribute
967
attribute.__closure__))["func"]
968
.cell_contents)
1111
969
# Create a new, but exactly alike, function
1112
970
# object, and decorate it to be a new D-Bus signal
1113
971
# with the alternate D-Bus interface name
1114
if sys.version_info.major == 2:
1115
new_function = types.FunctionType(
1116
nonmethod_func.func_code,
1117
nonmethod_func.func_globals,
1118
nonmethod_func.func_name,
1119
nonmethod_func.func_defaults,
1120
nonmethod_func.func_closure)
1121
else:
1122
new_function = types.FunctionType(
1123
nonmethod_func.__code__,
1124
nonmethod_func.__globals__,
1125
nonmethod_func.__name__,
1126
nonmethod_func.__defaults__,
1127
nonmethod_func.__closure__)
1128
new_function = (dbus.service.signal(
1129
alt_interface,
1130
attribute._dbus_signature)(new_function))
1131
# Copy annotations, if any
1132
try:
1133
new_function._dbus_annotations = dict(
1134
attribute._dbus_annotations)
1135
except AttributeError:
1136
pass
972
new_function = (dbus.service.signal
973
(alt_interface,
974
attribute._dbus_signature)
975
(types.FunctionType(
976
nonmethod_func.func_code,
977
nonmethod_func.func_globals,
978
nonmethod_func.func_name,
979
nonmethod_func.func_defaults,
980
nonmethod_func.func_closure)))
1137
981
# Define a creator of a function to call both the
1138
# original and alternate functions, so both the
1139
# original and alternate signals gets sent when
1140
# the function is called
982
# old and new functions, so both the old and new
983
# signals gets sent when the function is called
1141
984
def fixscope(func1, func2):
1142
985
"""This function is a scope container to pass
1143
986
func1 and func2 to the "call_both" function
1144
987
outside of its arguments"""
1145
1146
988
def call_both(*args, **kwargs):
1147
989
"""This function will emit two D-Bus
1148
990
signals by calling func1 and func2"""
1149
991
func1(*args, **kwargs)
1150
992
func2(*args, **kwargs)
1151
1152
993
return call_both
1153
994
# Create the "call_both" function and add it to
1154
995
# the class
1155
attr[attrname] = fixscope(attribute, new_function)
996
attr[attrname] = fixscope(attribute,
997
new_function)
1156
998
# Is this a D-Bus method?
1157
999
elif getattr(attribute, "_dbus_is_method", False):
1158
1000
# Create a new, but exactly alike, function
1159
1001
# object. Decorate it to be a new D-Bus method
1160
1002
# with the alternate D-Bus interface name. Add it
1161
1003
# to the class.
1162
attr[attrname] = (
1163
dbus.service.method(
1164
alt_interface,
1165
attribute._dbus_in_signature,
1166
attribute._dbus_out_signature)
1167
(types.FunctionType(attribute.func_code,
1168
attribute.func_globals,
1169
attribute.func_name,
1170
attribute.func_defaults,
1171
attribute.func_closure)))
1172
# Copy annotations, if any
1173
try:
1174
attr[attrname]._dbus_annotations = dict(
1175
attribute._dbus_annotations)
1176
except AttributeError:
1177
pass
1004
attr[attrname] = (dbus.service.method
1005
(alt_interface,
1006
attribute._dbus_in_signature,
1007
attribute._dbus_out_signature)
1008
(types.FunctionType
1009
(attribute.func_code,
1010
attribute.func_globals,
1011
attribute.func_name,
1012
attribute.func_defaults,
1013
attribute.func_closure)))
1178
1014
# Is this a D-Bus property?
1179
1015
elif getattr(attribute, "_dbus_is_property", False):
1180
1016
# Create a new, but exactly alike, function
1181
1017
# object, and decorate it to be a new D-Bus
1182
1018
# property with the alternate D-Bus interface
1183
1019
# name. Add it to the class.
1184
attr[attrname] = (dbus_service_property(
1185
alt_interface, attribute._dbus_signature,
1186
attribute._dbus_access,
1187
attribute._dbus_get_args_options
1188
["byte_arrays"])
1189
(types.FunctionType(
1190
attribute.func_code,
1191
attribute.func_globals,
1192
attribute.func_name,
1193
attribute.func_defaults,
1194
attribute.func_closure)))
1195
# Copy annotations, if any
1196
try:
1197
attr[attrname]._dbus_annotations = dict(
1198
attribute._dbus_annotations)
1199
except AttributeError:
1200
pass
1201
# Is this a D-Bus interface?
1202
elif getattr(attribute, "_dbus_is_interface", False):
1203
# Create a new, but exactly alike, function
1204
# object. Decorate it to be a new D-Bus interface
1205
# with the alternate D-Bus interface name. Add it
1206
# to the class.
1207
attr[attrname] = (
1208
dbus_interface_annotations(alt_interface)
1209
(types.FunctionType(attribute.func_code,
1210
attribute.func_globals,
1211
attribute.func_name,
1212
attribute.func_defaults,
1213
attribute.func_closure)))
1214
if deprecate:
1215
# Deprecate all alternate interfaces
1216
iname="_AlternateDBusNames_interface_annotation{}"
1217
for interface_name in interface_names:
1218
1219
@dbus_interface_annotations(interface_name)
1220
def func(self):
1221
return { "org.freedesktop.DBus.Deprecated":
1222
"true" }
1223
# Find an unused name
1224
for aname in (iname.format(i)
1225
for i in itertools.count()):
1226
if aname not in attr:
1227
attr[aname] = func
1228
break
1229
if interface_names:
1230
# Replace the class with a new subclass of it with
1231
# methods, signals, etc. as created above.
1232
cls = type(b"{}Alternate".format(cls.__name__),
1233
(cls, ), attr)
1234
return cls
1235
1236
return wrapper
1237
1238
1239
@alternate_dbus_interfaces({"se.recompile.Mandos":
1240
"se.bsnet.fukt.Mandos"})
1020
attr[attrname] = (dbus_service_property
1021
(alt_interface,
1022
attribute._dbus_signature,
1023
attribute._dbus_access,
1024
attribute
1025
._dbus_get_args_options
1026
["byte_arrays"])
1027
(types.FunctionType
1028
(attribute.func_code,
1029
attribute.func_globals,
1030
attribute.func_name,
1031
attribute.func_defaults,
1032
attribute.func_closure)))
1033
return type.__new__(mcs, name, bases, attr)
1034
1035
1241
1036
class ClientDBus(Client, DBusObjectWithProperties):
1242
1037
"""A Client class using D-Bus
1243
1038
1247
1042
"""
1248
1043
1249
1044
runtime_expansions = (Client.runtime_expansions
1250
+ ("dbus_object_path", ))
1251
1252
_interface = "se.recompile.Mandos.Client"
1045
+ ("dbus_object_path",))
1253
1046
1254
1047
# dbus.service.Object doesn't use super(), so we can't either.
1255
1048
1258
1051
Client.__init__(self, *args, **kwargs)
1259
1052
# Only now, when this client is initialized, can it show up on
1260
1053
# the D-Bus
1261
client_object_name = str(self.name).translate(
1054
client_object_name = unicode(self.name).translate(
1262
1055
{ord("."): ord("_"),
1263
1056
ord("-"): ord("_")})
1264
self.dbus_object_path = dbus.ObjectPath(
1265
"/clients/" + client_object_name)
1057
self.dbus_object_path = (dbus.ObjectPath
1058
("/clients/" + client_object_name))
1266
1059
DBusObjectWithProperties.__init__(self, self.bus,
1267
1060
self.dbus_object_path)
1268
1269
def notifychangeproperty(transform_func, dbus_name,
1270
type_func=lambda x: x,
1271
variant_level=1,
1272
invalidate_only=False,
1273
_interface=_interface):
1061
1062
def notifychangeproperty(transform_func,
1063
dbus_name, type_func=lambda x: x,
1064
variant_level=1):
1274
1065
""" Modify a variable so that it's a property which announces
1275
1066
its changes to DBus.
1276
1067
1281
1072
to the D-Bus. Default: no transform
1282
1073
variant_level: D-Bus variant level. Default: 1
1283
1074
"""
1284
attrname = "_{}".format(dbus_name)
1285
1075
attrname = "_{0}".format(dbus_name)
1286
1076
def setter(self, value):
1287
1077
if hasattr(self, "dbus_object_path"):
1288
1078
if (not hasattr(self, attrname) or
1289
1079
type_func(getattr(self, attrname, None))
1290
1080
!= type_func(value)):
1291
if invalidate_only:
1292
self.PropertiesChanged(
1293
_interface, dbus.Dictionary(),
1294
dbus.Array((dbus_name, )))
1295
else:
1296
dbus_value = transform_func(
1297
type_func(value),
1298
variant_level = variant_level)
1299
self.PropertyChanged(dbus.String(dbus_name),
1300
dbus_value)
1301
self.PropertiesChanged(
1302
_interface,
1303
dbus.Dictionary({ dbus.String(dbus_name):
1304
dbus_value }),
1305
dbus.Array())
1081
dbus_value = transform_func(type_func(value),
1082
variant_level
1083
=variant_level)
1084
self.PropertyChanged(dbus.String(dbus_name),
1085
dbus_value)
1306
1086
setattr(self, attrname, value)
1307
1087
1308
1088
return property(lambda self: getattr(self, attrname), setter)
1309
1089
1090
1310
1091
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1311
1092
approvals_pending = notifychangeproperty(dbus.Boolean,
1312
1093
"ApprovalPending",
1314
1095
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1315
1096
last_enabled = notifychangeproperty(datetime_to_dbus,
1316
1097
"LastEnabled")
1317
checker = notifychangeproperty(
1318
dbus.Boolean, "CheckerRunning",
1319
type_func = lambda checker: checker is not None)
1098
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1099
type_func = lambda checker:
1100
checker is not None)
1320
1101
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1321
1102
"LastCheckedOK")
1322
last_checker_status = notifychangeproperty(dbus.Int16,
1323
"LastCheckerStatus")
1324
1103
last_approval_request = notifychangeproperty(
1325
1104
datetime_to_dbus, "LastApprovalRequest")
1326
1105
approved_by_default = notifychangeproperty(dbus.Boolean,
1327
1106
"ApprovedByDefault")
1328
approval_delay = notifychangeproperty(
1329
dbus.UInt64, "ApprovalDelay",
1330
type_func = lambda td: td.total_seconds() * 1000)
1107
approval_delay = notifychangeproperty(dbus.UInt64,
1108
"ApprovalDelay",
1109
type_func =
1110
timedelta_to_milliseconds)
1331
1111
approval_duration = notifychangeproperty(
1332
1112
dbus.UInt64, "ApprovalDuration",
1333
type_func = lambda td: td.total_seconds() * 1000)
1113
type_func = timedelta_to_milliseconds)
1334
1114
host = notifychangeproperty(dbus.String, "Host")
1335
timeout = notifychangeproperty(
1336
dbus.UInt64, "Timeout",
1337
type_func = lambda td: td.total_seconds() * 1000)
1115
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1116
type_func =
1117
timedelta_to_milliseconds)
1338
1118
extended_timeout = notifychangeproperty(
1339
1119
dbus.UInt64, "ExtendedTimeout",
1340
type_func = lambda td: td.total_seconds() * 1000)
1341
interval = notifychangeproperty(
1342
dbus.UInt64, "Interval",
1343
type_func = lambda td: td.total_seconds() * 1000)
1120
type_func = timedelta_to_milliseconds)
1121
interval = notifychangeproperty(dbus.UInt64,
1122
"Interval",
1123
type_func =
1124
timedelta_to_milliseconds)
1344
1125
checker_command = notifychangeproperty(dbus.String, "Checker")
1345
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1346
invalidate_only=True)
1347
1126
1348
1127
del notifychangeproperty
1349
1128
1356
1135
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1357
1136
Client.__del__(self, *args, **kwargs)
1358
1137
1359
def checker_callback(self, source, condition,
1360
connection, command, *args, **kwargs):
1361
ret = Client.checker_callback(self, source, condition,
1362
connection, command, *args,
1363
**kwargs)
1364
exitstatus = self.last_checker_status
1365
if exitstatus >= 0:
1138
def checker_callback(self, pid, condition, command,
1139
*args, **kwargs):
1140
self.checker_callback_tag = None
1141
self.checker = None
1142
if os.WIFEXITED(condition):
1143
exitstatus = os.WEXITSTATUS(condition)
1366
1144
# Emit D-Bus signal
1367
1145
self.CheckerCompleted(dbus.Int16(exitstatus),
1368
dbus.Int64(0),
1146
dbus.Int64(condition),
1369
1147
dbus.String(command))
1370
1148
else:
1371
1149
# Emit D-Bus signal
1372
1150
self.CheckerCompleted(dbus.Int16(-1),
1373
dbus.Int64(
1374
self.last_checker_signal),
1151
dbus.Int64(condition),
1375
1152
dbus.String(command))
1376
return ret
1153
1154
return Client.checker_callback(self, pid, condition, command,
1155
*args, **kwargs)
1377
1156
1378
1157
def start_checker(self, *args, **kwargs):
1379
old_checker_pid = getattr(self.checker, "pid", None)
1158
old_checker = self.checker
1159
if self.checker is not None:
1160
old_checker_pid = self.checker.pid
1161
else:
1162
old_checker_pid = None
1380
1163
r = Client.start_checker(self, *args, **kwargs)
1381
1164
# Only if new checker process was started
1382
1165
if (self.checker is not None
1390
1173
return False
1391
1174
1392
1175
def approve(self, value=True):
1176
self.send_changedstate()
1393
1177
self.approved = value
1394
gobject.timeout_add(int(self.approval_duration.total_seconds()
1395
* 1000), self._reset_approved)
1396
self.send_changedstate()
1178
gobject.timeout_add(timedelta_to_milliseconds
1179
(self.approval_duration),
1180
self._reset_approved)
1181
1397
1182
1398
1183
## D-Bus methods, signals & properties
1399
1400
## Interfaces
1184
_interface = "se.recompile.Mandos.Client"
1401
1185
1402
1186
## Signals
1403
1187
1414
1198
pass
1415
1199
1416
1200
# PropertyChanged - signal
1417
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1418
1201
@dbus.service.signal(_interface, signature="sv")
1419
1202
def PropertyChanged(self, property, value):
1420
1203
"D-Bus signal"
1441
1224
"D-Bus signal"
1442
1225
return self.need_approval()
1443
1226
1227
# NewRequest - signal
1228
@dbus.service.signal(_interface, signature="s")
1229
def NewRequest(self, ip):
1230
"""D-Bus signal
1231
Is sent after a client request a secret.
1232
"""
1233
pass
1234
1444
1235
## Methods
1445
1236
1446
1237
# Approve - method
1484
1275
return dbus.Boolean(bool(self.approvals_pending))
1485
1276
1486
1277
# ApprovedByDefault - property
1487
@dbus_service_property(_interface,
1488
signature="b",
1278
@dbus_service_property(_interface, signature="b",
1489
1279
access="readwrite")
1490
1280
def ApprovedByDefault_dbus_property(self, value=None):
1491
1281
if value is None: # get
1493
1283
self.approved_by_default = bool(value)
1494
1284
1495
1285
# ApprovalDelay - property
1496
@dbus_service_property(_interface,
1497
signature="t",
1286
@dbus_service_property(_interface, signature="t",
1498
1287
access="readwrite")
1499
1288
def ApprovalDelay_dbus_property(self, value=None):
1500
1289
if value is None: # get
1501
return dbus.UInt64(self.approval_delay.total_seconds()
1502
* 1000)
1290
return dbus.UInt64(self.approval_delay_milliseconds())
1503
1291
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1504
1292
1505
1293
# ApprovalDuration - property
1506
@dbus_service_property(_interface,
1507
signature="t",
1294
@dbus_service_property(_interface, signature="t",
1508
1295
access="readwrite")
1509
1296
def ApprovalDuration_dbus_property(self, value=None):
1510
1297
if value is None: # get
1511
return dbus.UInt64(self.approval_duration.total_seconds()
1512
* 1000)
1298
return dbus.UInt64(timedelta_to_milliseconds(
1299
self.approval_duration))
1513
1300
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1514
1301
1515
1302
# Name - property
1523
1310
return dbus.String(self.fingerprint)
1524
1311
1525
1312
# Host - property
1526
@dbus_service_property(_interface,
1527
signature="s",
1313
@dbus_service_property(_interface, signature="s",
1528
1314
access="readwrite")
1529
1315
def Host_dbus_property(self, value=None):
1530
1316
if value is None: # get
1531
1317
return dbus.String(self.host)
1532
self.host = str(value)
1318
self.host = unicode(value)
1533
1319
1534
1320
# Created - property
1535
1321
@dbus_service_property(_interface, signature="s", access="read")
1542
1328
return datetime_to_dbus(self.last_enabled)
1543
1329
1544
1330
# Enabled - property
1545
@dbus_service_property(_interface,
1546
signature="b",
1331
@dbus_service_property(_interface, signature="b",
1547
1332
access="readwrite")
1548
1333
def Enabled_dbus_property(self, value=None):
1549
1334
if value is None: # get
1554
1339
self.disable()
1555
1340
1556
1341
# LastCheckedOK - property
1557
@dbus_service_property(_interface,
1558
signature="s",
1342
@dbus_service_property(_interface, signature="s",
1559
1343
access="readwrite")
1560
1344
def LastCheckedOK_dbus_property(self, value=None):
1561
1345
if value is not None:
1563
1347
return
1564
1348
return datetime_to_dbus(self.last_checked_ok)
1565
1349
1566
# LastCheckerStatus - property
1567
@dbus_service_property(_interface, signature="n", access="read")
1568
def LastCheckerStatus_dbus_property(self):
1569
return dbus.Int16(self.last_checker_status)
1570
1571
1350
# Expires - property
1572
1351
@dbus_service_property(_interface, signature="s", access="read")
1573
1352
def Expires_dbus_property(self):
1579
1358
return datetime_to_dbus(self.last_approval_request)
1580
1359
1581
1360
# Timeout - property
1582
@dbus_service_property(_interface,
1583
signature="t",
1361
@dbus_service_property(_interface, signature="t",
1584
1362
access="readwrite")
1585
1363
def Timeout_dbus_property(self, value=None):
1586
1364
if value is None: # get
1587
return dbus.UInt64(self.timeout.total_seconds() * 1000)
1588
old_timeout = self.timeout
1365
return dbus.UInt64(self.timeout_milliseconds())
1589
1366
self.timeout = datetime.timedelta(0, 0, 0, value)
1590
# Reschedule disabling
1367
# Reschedule timeout
1591
1368
if self.enabled:
1592
1369
now = datetime.datetime.utcnow()
1593
self.expires += self.timeout - old_timeout
1594
if self.expires <= now:
1370
time_to_die = timedelta_to_milliseconds(
1371
(self.last_checked_ok + self.timeout) - now)
1372
if time_to_die <= 0:
1595
1373
# The timeout has passed
1596
1374
self.disable()
1597
1375
else:
1376
self.expires = (now +
1377
datetime.timedelta(milliseconds =
1378
time_to_die))
1598
1379
if (getattr(self, "disable_initiator_tag", None)
1599
1380
is None):
1600
1381
return
1601
1382
gobject.source_remove(self.disable_initiator_tag)
1602
self.disable_initiator_tag = gobject.timeout_add(
1603
int((self.expires - now).total_seconds() * 1000),
1604
self.disable)
1383
self.disable_initiator_tag = (gobject.timeout_add
1384
(time_to_die,
1385
self.disable))
1605
1386
1606
1387
# ExtendedTimeout - property
1607
@dbus_service_property(_interface,
1608
signature="t",
1388
@dbus_service_property(_interface, signature="t",
1609
1389
access="readwrite")
1610
1390
def ExtendedTimeout_dbus_property(self, value=None):
1611
1391
if value is None: # get
1612
return dbus.UInt64(self.extended_timeout.total_seconds()
1613
* 1000)
1392
return dbus.UInt64(self.extended_timeout_milliseconds())
1614
1393
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1615
1394
1616
1395
# Interval - property
1617
@dbus_service_property(_interface,
1618
signature="t",
1396
@dbus_service_property(_interface, signature="t",
1619
1397
access="readwrite")
1620
1398
def Interval_dbus_property(self, value=None):
1621
1399
if value is None: # get
1622
return dbus.UInt64(self.interval.total_seconds() * 1000)
1400
return dbus.UInt64(self.interval_milliseconds())
1623
1401
self.interval = datetime.timedelta(0, 0, 0, value)
1624
1402
if getattr(self, "checker_initiator_tag", None) is None:
1625
1403
return
1626
1404
if self.enabled:
1627
1405
# Reschedule checker run
1628
1406
gobject.source_remove(self.checker_initiator_tag)
1629
self.checker_initiator_tag = gobject.timeout_add(
1630
value, self.start_checker)
1631
self.start_checker() # Start one now, too
1407
self.checker_initiator_tag = (gobject.timeout_add
1408
(value, self.start_checker))
1409
self.start_checker() # Start one now, too
1632
1410
1633
1411
# Checker - property
1634
@dbus_service_property(_interface,
1635
signature="s",
1412
@dbus_service_property(_interface, signature="s",
1636
1413
access="readwrite")
1637
1414
def Checker_dbus_property(self, value=None):
1638
1415
if value is None: # get
1639
1416
return dbus.String(self.checker_command)
1640
self.checker_command = str(value)
1417
self.checker_command = unicode(value)
1641
1418
1642
1419
# CheckerRunning - property
1643
@dbus_service_property(_interface,
1644
signature="b",
1420
@dbus_service_property(_interface, signature="b",
1645
1421
access="readwrite")
1646
1422
def CheckerRunning_dbus_property(self, value=None):
1647
1423
if value is None: # get
1657
1433
return self.dbus_object_path # is already a dbus.ObjectPath
1658
1434
1659
1435
# Secret = property
1660
@dbus_service_property(_interface,
1661
signature="ay",
1662
access="write",
1663
byte_arrays=True)
1436
@dbus_service_property(_interface, signature="ay",
1437
access="write", byte_arrays=True)
1664
1438
def Secret_dbus_property(self, value):
1665
self.secret = bytes(value)
1439
self.secret = str(value)
1666
1440
1667
1441
del _interface
1668
1442
1672
1446
self._pipe = child_pipe
1673
1447
self._pipe.send(('init', fpr, address))
1674
1448
if not self._pipe.recv():
1675
raise KeyError(fpr)
1449
raise KeyError()
1676
1450
1677
1451
def __getattribute__(self, name):
1678
1452
if name == '_pipe':
1682
1456
if data[0] == 'data':
1683
1457
return data[1]
1684
1458
if data[0] == 'function':
1685
1686
1459
def func(*args, **kwargs):
1687
1460
self._pipe.send(('funcall', name, args, kwargs))
1688
1461
return self._pipe.recv()[1]
1689
1690
1462
return func
1691
1463
1692
1464
def __setattr__(self, name, value):
1695
1467
self._pipe.send(('setattr', name, value))
1696
1468
1697
1469
1470
class ClientDBusTransitional(ClientDBus):
1471
__metaclass__ = AlternateDBusNamesMetaclass
1472
1473
1698
1474
class ClientHandler(socketserver.BaseRequestHandler, object):
1699
1475
"""A class to handle client connections.
1700
1476
1704
1480
def handle(self):
1705
1481
with contextlib.closing(self.server.child_pipe) as child_pipe:
1706
1482
logger.info("TCP connection from: %s",
1707
str(self.client_address))
1483
unicode(self.client_address))
1708
1484
logger.debug("Pipe FD: %d",
1709
1485
self.server.child_pipe.fileno())
1710
1486
1711
session = gnutls.connection.ClientSession(
1712
self.request, gnutls.connection .X509Credentials())
1487
session = (gnutls.connection
1488
.ClientSession(self.request,
1489
gnutls.connection
1490
.X509Credentials()))
1713
1491
1714
1492
# Note: gnutls.connection.X509Credentials is really a
1715
1493
# generic GnuTLS certificate credentials object so long as
1724
1502
priority = self.server.gnutls_priority
1725
1503
if priority is None:
1726
1504
priority = "NORMAL"
1727
gnutls.library.functions.gnutls_priority_set_direct(
1728
session._c_object, priority, None)
1505
(gnutls.library.functions
1506
.gnutls_priority_set_direct(session._c_object,
1507
priority, None))
1729
1508
1730
1509
# Start communication using the Mandos protocol
1731
1510
# Get protocol number
1733
1512
logger.debug("Protocol version: %r", line)
1734
1513
try:
1735
1514
if int(line.strip().split()[0]) > 1:
1736
raise RuntimeError(line)
1515
raise RuntimeError
1737
1516
except (ValueError, IndexError, RuntimeError) as error:
1738
1517
logger.error("Unknown protocol version: %s", error)
1739
1518
return
1751
1530
approval_required = False
1752
1531
try:
1753
1532
try:
1754
fpr = self.fingerprint(
1755
self.peer_certificate(session))
1533
fpr = self.fingerprint(self.peer_certificate
1534
(session))
1756
1535
except (TypeError,
1757
1536
gnutls.errors.GNUTLSError) as error:
1758
1537
logger.warning("Bad certificate: %s", error)
1765
1544
except KeyError:
1766
1545
return
1767
1546
1547
if self.server.use_dbus:
1548
# Emit D-Bus signal
1549
client.NewRequest(unicode(self.client_address)[0])
1550
1768
1551
if client.approval_delay:
1769
1552
delay = client.approval_delay
1770
1553
client.approvals_pending += 1
1773
1556
while True:
1774
1557
if not client.enabled:
1775
1558
logger.info("Client %s is disabled",
1776
client.name)
1559
client.name)
1777
1560
if self.server.use_dbus:
1778
1561
# Emit D-Bus signal
1779
1562
client.Rejected("Disabled")
1788
1571
if self.server.use_dbus:
1789
1572
# Emit D-Bus signal
1790
1573
client.NeedApproval(
1791
client.approval_delay.total_seconds()
1792
* 1000, client.approved_by_default)
1574
client.approval_delay_milliseconds(),
1575
client.approved_by_default)
1793
1576
else:
1794
1577
logger.warning("Client %s was not approved",
1795
1578
client.name)
1801
1584
#wait until timeout or approved
1802
1585
time = datetime.datetime.now()
1803
1586
client.changedstate.acquire()
1804
client.changedstate.wait(delay.total_seconds())
1587
(client.changedstate.wait
1588
(float(client.timedelta_to_milliseconds(delay)
1589
/ 1000)))
1805
1590
client.changedstate.release()
1806
1591
time2 = datetime.datetime.now()
1807
1592
if (time2 - time) >= delay:
1823
1608
try:
1824
1609
sent = session.send(client.secret[sent_size:])
1825
1610
except gnutls.errors.GNUTLSError as error:
1826
logger.warning("gnutls send failed",
1827
exc_info=error)
1611
logger.warning("gnutls send failed")
1828
1612
return
1829
logger.debug("Sent: %d, remaining: %d", sent,
1830
len(client.secret) - (sent_size
1831
+ sent))
1613
logger.debug("Sent: %d, remaining: %d",
1614
sent, len(client.secret)
1615
- (sent_size + sent))
1832
1616
sent_size += sent
1833
1617
1834
1618
logger.info("Sending secret to %s", client.name)
1835
1619
# bump the timeout using extended_timeout
1836
client.bump_timeout(client.extended_timeout)
1620
client.checked_ok(client.extended_timeout)
1837
1621
if self.server.use_dbus:
1838
1622
# Emit D-Bus signal
1839
1623
client.GotSecret()
1844
1628
try:
1845
1629
session.bye()
1846
1630
except gnutls.errors.GNUTLSError as error:
1847
logger.warning("GnuTLS bye failed",
1848
exc_info=error)
1631
logger.warning("GnuTLS bye failed")
1849
1632
1850
1633
@staticmethod
1851
1634
def peer_certificate(session):
1852
1635
"Return the peer's OpenPGP certificate as a bytestring"
1853
1636
# If not an OpenPGP certificate...
1854
if (gnutls.library.functions.gnutls_certificate_type_get(
1855
session._c_object)
1637
if (gnutls.library.functions
1638
.gnutls_certificate_type_get(session._c_object)
1856
1639
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1857
1640
# ...do the normal thing
1858
1641
return session.peer_certificate
1872
1655
def fingerprint(openpgp):
1873
1656
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1874
1657
# New GnuTLS "datum" with the OpenPGP public key
1875
datum = gnutls.library.types.gnutls_datum_t(
1876
ctypes.cast(ctypes.c_char_p(openpgp),
1877
ctypes.POINTER(ctypes.c_ubyte)),
1878
ctypes.c_uint(len(openpgp)))
1658
datum = (gnutls.library.types
1659
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1660
ctypes.POINTER
1661
(ctypes.c_ubyte)),
1662
ctypes.c_uint(len(openpgp))))
1879
1663
# New empty GnuTLS certificate
1880
1664
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1881
gnutls.library.functions.gnutls_openpgp_crt_init(
1882
ctypes.byref(crt))
1665
(gnutls.library.functions
1666
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1883
1667
# Import the OpenPGP public key into the certificate
1884
gnutls.library.functions.gnutls_openpgp_crt_import(
1885
crt, ctypes.byref(datum),
1886
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
1668
(gnutls.library.functions
1669
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1670
gnutls.library.constants
1671
.GNUTLS_OPENPGP_FMT_RAW))
1887
1672
# Verify the self signature in the key
1888
1673
crtverify = ctypes.c_uint()
1889
gnutls.library.functions.gnutls_openpgp_crt_verify_self(
1890
crt, 0, ctypes.byref(crtverify))
1674
(gnutls.library.functions
1675
.gnutls_openpgp_crt_verify_self(crt, 0,
1676
ctypes.byref(crtverify)))
1891
1677
if crtverify.value != 0:
1892
1678
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1893
raise gnutls.errors.CertificateSecurityError(
1894
"Verify failed")
1679
raise (gnutls.errors.CertificateSecurityError
1680
("Verify failed"))
1895
1681
# New buffer for the fingerprint
1896
1682
buf = ctypes.create_string_buffer(20)
1897
1683
buf_len = ctypes.c_size_t()
1898
1684
# Get the fingerprint from the certificate into the buffer
1899
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint(
1900
crt, ctypes.byref(buf), ctypes.byref(buf_len))
1685
(gnutls.library.functions
1686
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1687
ctypes.byref(buf_len)))
1901
1688
# Deinit the certificate
1902
1689
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1903
1690
# Convert the buffer to a Python bytestring
1909
1696
1910
1697
class MultiprocessingMixIn(object):
1911
1698
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1912
1913
1699
def sub_process_main(self, request, address):
1914
1700
try:
1915
1701
self.finish_request(request, address)
1920
1706
def process_request(self, request, address):
1921
1707
"""Start a new process to process the request."""
1922
1708
proc = multiprocessing.Process(target = self.sub_process_main,
1923
args = (request, address))
1709
args = (request,
1710
address))
1924
1711
proc.start()
1925
1712
return proc
1926
1713
1927
1714
1928
1715
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1929
1716
""" adds a pipe to the MixIn """
1930
1931
1717
def process_request(self, request, client_address):
1932
1718
"""Overrides and wraps the original process_request().
1933
1719
1942
1728
1943
1729
def add_pipe(self, parent_pipe, proc):
1944
1730
"""Dummy function; override as necessary"""
1945
raise NotImplementedError()
1731
raise NotImplementedError
1946
1732
1947
1733
1948
1734
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1954
1740
interface: None or a network interface name (string)
1955
1741
use_ipv6: Boolean; to use IPv6 or not
1956
1742
"""
1957
1958
1743
def __init__(self, server_address, RequestHandlerClass,
1959
interface=None,
1960
use_ipv6=True,
1961
socketfd=None):
1962
"""If socketfd is set, use that file descriptor instead of
1963
creating a new one with socket.socket().
1964
"""
1744
interface=None, use_ipv6=True):
1965
1745
self.interface = interface
1966
1746
if use_ipv6:
1967
1747
self.address_family = socket.AF_INET6
1968
if socketfd is not None:
1969
# Save the file descriptor
1970
self.socketfd = socketfd
1971
# Save the original socket.socket() function
1972
self.socket_socket = socket.socket
1973
# To implement --socket, we monkey patch socket.socket.
1974
#
1975
# (When socketserver.TCPServer is a new-style class, we
1976
# could make self.socket into a property instead of monkey
1977
# patching socket.socket.)
1978
#
1979
# Create a one-time-only replacement for socket.socket()
1980
@functools.wraps(socket.socket)
1981
def socket_wrapper(*args, **kwargs):
1982
# Restore original function so subsequent calls are
1983
# not affected.
1984
socket.socket = self.socket_socket
1985
del self.socket_socket
1986
# This time only, return a new socket object from the
1987
# saved file descriptor.
1988
return socket.fromfd(self.socketfd, *args, **kwargs)
1989
# Replace socket.socket() function with wrapper
1990
socket.socket = socket_wrapper
1991
# The socketserver.TCPServer.__init__ will call
1992
# socket.socket(), which might be our replacement,
1993
# socket_wrapper(), if socketfd was set.
1994
1748
socketserver.TCPServer.__init__(self, server_address,
1995
1749
RequestHandlerClass)
1996
1997
1750
def server_bind(self):
1998
1751
"""This overrides the normal server_bind() function
1999
1752
to bind to an interface if one was specified, and also NOT to
2005
1758
self.interface)
2006
1759
else:
2007
1760
try:
2008
self.socket.setsockopt(
2009
socket.SOL_SOCKET, SO_BINDTODEVICE,
2010
(self.interface + "\0").encode("utf-8"))
1761
self.socket.setsockopt(socket.SOL_SOCKET,
1762
SO_BINDTODEVICE,
1763
str(self.interface
1764
+ '\0'))
2011
1765
except socket.error as error:
2012
if error.errno == errno.EPERM:
2013
logger.error("No permission to bind to"
2014
" interface %s", self.interface)
2015
elif error.errno == errno.ENOPROTOOPT:
1766
if error[0] == errno.EPERM:
1767
logger.error("No permission to"
1768
" bind to interface %s",
1769
self.interface)
1770
elif error[0] == errno.ENOPROTOOPT:
2016
1771
logger.error("SO_BINDTODEVICE not available;"
2017
1772
" cannot bind to interface %s",
2018
1773
self.interface)
2019
elif error.errno == errno.ENODEV:
2020
logger.error("Interface %s does not exist,"
2021
" cannot bind", self.interface)
2022
1774
else:
2023
1775
raise
2024
1776
# Only bind(2) the socket if we really need to.
2027
1779
if self.address_family == socket.AF_INET6:
2028
1780
any_address = "::" # in6addr_any
2029
1781
else:
2030
any_address = "0.0.0.0" # INADDR_ANY
1782
any_address = socket.INADDR_ANY
2031
1783
self.server_address = (any_address,
2032
1784
self.server_address[1])
2033
1785
elif not self.server_address[1]:
2034
self.server_address = (self.server_address[0], 0)
1786
self.server_address = (self.server_address[0],
1787
0)
2035
1788
# if self.interface:
2036
1789
# self.server_address = (self.server_address[0],
2037
1790
# 0, # port
2051
1804
2052
1805
Assumes a gobject.MainLoop event loop.
2053
1806
"""
2054
2055
1807
def __init__(self, server_address, RequestHandlerClass,
2056
interface=None,
2057
use_ipv6=True,
2058
clients=None,
2059
gnutls_priority=None,
2060
use_dbus=True,
2061
socketfd=None):
1808
interface=None, use_ipv6=True, clients=None,
1809
gnutls_priority=None, use_dbus=True):
2062
1810
self.enabled = False
2063
1811
self.clients = clients
2064
1812
if self.clients is None:
2068
1816
IPv6_TCPServer.__init__(self, server_address,
2069
1817
RequestHandlerClass,
2070
1818
interface = interface,
2071
use_ipv6 = use_ipv6,
2072
socketfd = socketfd)
2073
1819
use_ipv6 = use_ipv6)
2074
1820
def server_activate(self):
2075
1821
if self.enabled:
2076
1822
return socketserver.TCPServer.server_activate(self)
2080
1826
2081
1827
def add_pipe(self, parent_pipe, proc):
2082
1828
# Call "handle_ipc" for both data and EOF events
2083
gobject.io_add_watch(
2084
parent_pipe.fileno(),
2085
gobject.IO_IN | gobject.IO_HUP,
2086
functools.partial(self.handle_ipc,
2087
parent_pipe = parent_pipe,
2088
proc = proc))
1829
gobject.io_add_watch(parent_pipe.fileno(),
1830
gobject.IO_IN | gobject.IO_HUP,
1831
functools.partial(self.handle_ipc,
1832
parent_pipe =
1833
parent_pipe,
1834
proc = proc))
2089
1835
2090
def handle_ipc(self, source, condition,
2091
parent_pipe=None,
2092
proc = None,
2093
client_object=None):
1836
def handle_ipc(self, source, condition, parent_pipe=None,
1837
proc = None, client_object=None):
1838
condition_names = {
1839
gobject.IO_IN: "IN", # There is data to read.
1840
gobject.IO_OUT: "OUT", # Data can be written (without
1841
# blocking).
1842
gobject.IO_PRI: "PRI", # There is urgent data to read.
1843
gobject.IO_ERR: "ERR", # Error condition.
1844
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1845
# broken, usually for pipes and
1846
# sockets).
1847
}
1848
conditions_string = ' | '.join(name
1849
for cond, name in
1850
condition_names.iteritems()
1851
if cond & condition)
2094
1852
# error, or the other end of multiprocessing.Pipe has closed
2095
if condition & (gobject.IO_ERR | gobject.IO_HUP):
1853
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
2096
1854
# Wait for other process to exit
2097
1855
proc.join()
2098
1856
return False
2119
1877
parent_pipe.send(False)
2120
1878
return False
2121
1879
2122
gobject.io_add_watch(
2123
parent_pipe.fileno(),
2124
gobject.IO_IN | gobject.IO_HUP,
2125
functools.partial(self.handle_ipc,
2126
parent_pipe = parent_pipe,
2127
proc = proc,
2128
client_object = client))
1880
gobject.io_add_watch(parent_pipe.fileno(),
1881
gobject.IO_IN | gobject.IO_HUP,
1882
functools.partial(self.handle_ipc,
1883
parent_pipe =
1884
parent_pipe,
1885
proc = proc,
1886
client_object =
1887
client))
2129
1888
parent_pipe.send(True)
2130
1889
# remove the old hook in favor of the new above hook on
2131
1890
# same fileno
2137
1896
2138
1897
parent_pipe.send(('data', getattr(client_object,
2139
1898
funcname)(*args,
2140
**kwargs)))
1899
**kwargs)))
2141
1900
2142
1901
if command == 'getattr':
2143
1902
attrname = request[1]
2144
if isinstance(client_object.__getattribute__(attrname),
2145
collections.Callable):
2146
parent_pipe.send(('function', ))
1903
if callable(client_object.__getattribute__(attrname)):
1904
parent_pipe.send(('function',))
2147
1905
else:
2148
parent_pipe.send((
2149
'data', client_object.__getattribute__(attrname)))
1906
parent_pipe.send(('data', client_object
1907
.__getattribute__(attrname)))
2150
1908
2151
1909
if command == 'setattr':
2152
1910
attrname = request[1]
2156
1914
return True
2157
1915
2158
1916
2159
def rfc3339_duration_to_delta(duration):
2160
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2161
2162
>>> rfc3339_duration_to_delta("P7D")
2163
datetime.timedelta(7)
2164
>>> rfc3339_duration_to_delta("PT60S")
2165
datetime.timedelta(0, 60)
2166
>>> rfc3339_duration_to_delta("PT60M")
2167
datetime.timedelta(0, 3600)
2168
>>> rfc3339_duration_to_delta("PT24H")
2169
datetime.timedelta(1)
2170
>>> rfc3339_duration_to_delta("P1W")
2171
datetime.timedelta(7)
2172
>>> rfc3339_duration_to_delta("PT5M30S")
2173
datetime.timedelta(0, 330)
2174
>>> rfc3339_duration_to_delta("P1DT3M20S")
2175
datetime.timedelta(1, 200)
2176
"""
2177
2178
# Parsing an RFC 3339 duration with regular expressions is not
2179
# possible - there would have to be multiple places for the same
2180
# values, like seconds. The current code, while more esoteric, is
2181
# cleaner without depending on a parsing library. If Python had a
2182
# built-in library for parsing we would use it, but we'd like to
2183
# avoid excessive use of external libraries.
2184
2185
# New type for defining tokens, syntax, and semantics all-in-one
2186
Token = collections.namedtuple("Token", (
2187
"regexp", # To match token; if "value" is not None, must have
2188
# a "group" containing digits
2189
"value", # datetime.timedelta or None
2190
"followers")) # Tokens valid after this token
2191
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2192
# the "duration" ABNF definition in RFC 3339, Appendix A.
2193
token_end = Token(re.compile(r"$"), None, frozenset())
2194
token_second = Token(re.compile(r"(\d+)S"),
2195
datetime.timedelta(seconds=1),
2196
frozenset((token_end, )))
2197
token_minute = Token(re.compile(r"(\d+)M"),
2198
datetime.timedelta(minutes=1),
2199
frozenset((token_second, token_end)))
2200
token_hour = Token(re.compile(r"(\d+)H"),
2201
datetime.timedelta(hours=1),
2202
frozenset((token_minute, token_end)))
2203
token_time = Token(re.compile(r"T"),
2204
None,
2205
frozenset((token_hour, token_minute,
2206
token_second)))
2207
token_day = Token(re.compile(r"(\d+)D"),
2208
datetime.timedelta(days=1),
2209
frozenset((token_time, token_end)))
2210
token_month = Token(re.compile(r"(\d+)M"),
2211
datetime.timedelta(weeks=4),
2212
frozenset((token_day, token_end)))
2213
token_year = Token(re.compile(r"(\d+)Y"),
2214
datetime.timedelta(weeks=52),
2215
frozenset((token_month, token_end)))
2216
token_week = Token(re.compile(r"(\d+)W"),
2217
datetime.timedelta(weeks=1),
2218
frozenset((token_end, )))
2219
token_duration = Token(re.compile(r"P"), None,
2220
frozenset((token_year, token_month,
2221
token_day, token_time,
2222
token_week)))
2223
# Define starting values
2224
value = datetime.timedelta() # Value so far
2225
found_token = None
2226
followers = frozenset((token_duration, )) # Following valid tokens
2227
s = duration # String left to parse
2228
# Loop until end token is found
2229
while found_token is not token_end:
2230
# Search for any currently valid tokens
2231
for token in followers:
2232
match = token.regexp.match(s)
2233
if match is not None:
2234
# Token found
2235
if token.value is not None:
2236
# Value found, parse digits
2237
factor = int(match.group(1), 10)
2238
# Add to value so far
2239
value += factor * token.value
2240
# Strip token from string
2241
s = token.regexp.sub("", s, 1)
2242
# Go to found token
2243
found_token = token
2244
# Set valid next tokens
2245
followers = found_token.followers
2246
break
2247
else:
2248
# No currently valid tokens were found
2249
raise ValueError("Invalid RFC 3339 duration: {!r}"
2250
.format(duration))
2251
# End token found
2252
return value
2253
2254
2255
1917
def string_to_delta(interval):
2256
1918
"""Parse a string and return a datetime.timedelta
2257
1919
2268
1930
>>> string_to_delta('5m 30s')
2269
1931
datetime.timedelta(0, 330)
2270
1932
"""
2271
2272
try:
2273
return rfc3339_duration_to_delta(interval)
2274
except ValueError:
2275
pass
2276
2277
1933
timevalue = datetime.timedelta(0)
2278
1934
for s in interval.split():
2279
1935
try:
2280
suffix = s[-1]
1936
suffix = unicode(s[-1])
2281
1937
value = int(s[:-1])
2282
1938
if suffix == "d":
2283
1939
delta = datetime.timedelta(value)
2290
1946
elif suffix == "w":
2291
1947
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
2292
1948
else:
2293
raise ValueError("Unknown suffix {!r}".format(suffix))
2294
except IndexError as e:
1949
raise ValueError("Unknown suffix %r" % suffix)
1950
except (ValueError, IndexError) as e:
2295
1951
raise ValueError(*(e.args))
2296
1952
timevalue += delta
2297
1953
return timevalue
2310
1966
sys.exit()
2311
1967
if not noclose:
2312
1968
# Close all standard open file descriptors
2313
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1969
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2314
1970
if not stat.S_ISCHR(os.fstat(null).st_mode):
2315
1971
raise OSError(errno.ENODEV,
2316
"{} not a character device"
2317
.format(os.devnull))
1972
"%s not a character device"
1973
% os.path.devnull)
2318
1974
os.dup2(null, sys.stdin.fileno())
2319
1975
os.dup2(null, sys.stdout.fileno())
2320
1976
os.dup2(null, sys.stderr.fileno())
2329
1985
2330
1986
parser = argparse.ArgumentParser()
2331
1987
parser.add_argument("-v", "--version", action="version",
2332
version = "%(prog)s {}".format(version),
1988
version = "%%(prog)s %s" % version,
2333
1989
help="show version number and exit")
2334
1990
parser.add_argument("-i", "--interface", metavar="IF",
2335
1991
help="Bind to interface IF")
2341
1997
help="Run self-test")
2342
1998
parser.add_argument("--debug", action="store_true",
2343
1999
help="Debug mode; run in foreground and log"
2344
" to terminal", default=None)
2000
" to terminal")
2345
2001
parser.add_argument("--debuglevel", metavar="LEVEL",
2346
2002
help="Debug level for stdout output")
2347
2003
parser.add_argument("--priority", help="GnuTLS"
2354
2010
" files")
2355
2011
parser.add_argument("--no-dbus", action="store_false",
2356
2012
dest="use_dbus", help="Do not provide D-Bus"
2357
" system bus interface", default=None)
2013
" system bus interface")
2358
2014
parser.add_argument("--no-ipv6", action="store_false",
2359
dest="use_ipv6", help="Do not use IPv6",
2360
default=None)
2015
dest="use_ipv6", help="Do not use IPv6")
2361
2016
parser.add_argument("--no-restore", action="store_false",
2362
2017
dest="restore", help="Do not restore stored"
2363
" state", default=None)
2364
parser.add_argument("--socket", type=int,
2365
help="Specify a file descriptor to a network"
2366
" socket to use instead of creating one")
2018
" state")
2367
2019
parser.add_argument("--statedir", metavar="DIR",
2368
2020
help="Directory to save/restore state in")
2369
parser.add_argument("--foreground", action="store_true",
2370
help="Run in foreground", default=None)
2371
parser.add_argument("--no-zeroconf", action="store_false",
2372
dest="zeroconf", help="Do not use Zeroconf",
2373
default=None)
2374
2021
2375
2022
options = parser.parse_args()
2376
2023
2377
2024
if options.check:
2378
2025
import doctest
2379
fail_count, test_count = doctest.testmod()
2380
sys.exit(os.EX_OK if fail_count == 0 else 1)
2026
doctest.testmod()
2027
sys.exit()
2381
2028
2382
2029
# Default values for config file for server-global settings
2383
2030
server_defaults = { "interface": "",
2385
2032
"port": "",
2386
2033
"debug": "False",
2387
2034
"priority":
2388
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2389
":+SIGN-RSA-SHA224:+SIGN-RSA-RMD160",
2035
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2390
2036
"servicename": "Mandos",
2391
2037
"use_dbus": "True",
2392
2038
"use_ipv6": "True",
2393
2039
"debuglevel": "",
2394
2040
"restore": "True",
2395
"socket": "",
2396
"statedir": "/var/lib/mandos",
2397
"foreground": "False",
2398
"zeroconf": "True",
2399
}
2041
"statedir": "/var/lib/mandos"
2042
}
2400
2043
2401
2044
# Parse config file for server-global settings
2402
2045
server_config = configparser.SafeConfigParser(server_defaults)
2403
2046
del server_defaults
2404
server_config.read(os.path.join(options.configdir, "mandos.conf"))
2047
server_config.read(os.path.join(options.configdir,
2048
"mandos.conf"))
2405
2049
# Convert the SafeConfigParser object to a dict
2406
2050
server_settings = server_config.defaults()
2407
2051
# Use the appropriate methods on the non-string config options
2408
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
2052
for option in ("debug", "use_dbus", "use_ipv6"):
2409
2053
server_settings[option] = server_config.getboolean("DEFAULT",
2410
2054
option)
2411
2055
if server_settings["port"]:
2412
2056
server_settings["port"] = server_config.getint("DEFAULT",
2413
2057
"port")
2414
if server_settings["socket"]:
2415
server_settings["socket"] = server_config.getint("DEFAULT",
2416
"socket")
2417
# Later, stdin will, and stdout and stderr might, be dup'ed
2418
# over with an opened os.devnull. But we don't want this to
2419
# happen with a supplied network socket.
2420
if 0 <= server_settings["socket"] <= 2:
2421
server_settings["socket"] = os.dup(server_settings
2422
["socket"])
2423
2058
del server_config
2424
2059
2425
2060
# Override the settings from the config file with command line
2426
2061
# options, if set.
2427
2062
for option in ("interface", "address", "port", "debug",
2428
"priority", "servicename", "configdir", "use_dbus",
2429
"use_ipv6", "debuglevel", "restore", "statedir",
2430
"socket", "foreground", "zeroconf"):
2063
"priority", "servicename", "configdir",
2064
"use_dbus", "use_ipv6", "debuglevel", "restore",
2065
"statedir"):
2431
2066
value = getattr(options, option)
2432
2067
if value is not None:
2433
2068
server_settings[option] = value
2434
2069
del options
2435
2070
# Force all strings to be unicode
2436
2071
for option in server_settings.keys():
2437
if isinstance(server_settings[option], bytes):
2438
server_settings[option] = (server_settings[option]
2439
.decode("utf-8"))
2440
# Force all boolean options to be boolean
2441
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2442
"foreground", "zeroconf"):
2443
server_settings[option] = bool(server_settings[option])
2444
# Debug implies foreground
2445
if server_settings["debug"]:
2446
server_settings["foreground"] = True
2072
if type(server_settings[option]) is str:
2073
server_settings[option] = unicode(server_settings[option])
2447
2074
# Now we have our good server settings in "server_settings"
2448
2075
2449
2076
##################################################################
2450
2077
2451
if (not server_settings["zeroconf"]
2452
and not (server_settings["port"]
2453
or server_settings["socket"] != "")):
2454
parser.error("Needs port or socket to work without Zeroconf")
2455
2456
2078
# For convenience
2457
2079
debug = server_settings["debug"]
2458
2080
debuglevel = server_settings["debuglevel"]
2460
2082
use_ipv6 = server_settings["use_ipv6"]
2461
2083
stored_state_path = os.path.join(server_settings["statedir"],
2462
2084
stored_state_file)
2463
foreground = server_settings["foreground"]
2464
zeroconf = server_settings["zeroconf"]
2465
2085
2466
2086
if debug:
2467
2087
initlogger(debug, logging.DEBUG)
2473
2093
initlogger(debug, level)
2474
2094
2475
2095
if server_settings["servicename"] != "Mandos":
2476
syslogger.setFormatter(
2477
logging.Formatter('Mandos ({}) [%(process)d]:'
2478
' %(levelname)s: %(message)s'.format(
2479
server_settings["servicename"])))
2096
syslogger.setFormatter(logging.Formatter
2097
('Mandos (%s) [%%(process)d]:'
2098
' %%(levelname)s: %%(message)s'
2099
% server_settings["servicename"]))
2480
2100
2481
2101
# Parse config file with clients
2482
2102
client_config = configparser.SafeConfigParser(Client
2487
2107
global mandos_dbus_service
2488
2108
mandos_dbus_service = None
2489
2109
2490
socketfd = None
2491
if server_settings["socket"] != "":
2492
socketfd = server_settings["socket"]
2493
tcp_server = MandosServer(
2494
(server_settings["address"], server_settings["port"]),
2495
ClientHandler,
2496
interface=(server_settings["interface"] or None),
2497
use_ipv6=use_ipv6,
2498
gnutls_priority=server_settings["priority"],
2499
use_dbus=use_dbus,
2500
socketfd=socketfd)
2501
if not foreground:
2502
pidfilename = "/run/mandos.pid"
2503
if not os.path.isdir("/run/."):
2504
pidfilename = "/var/run/mandos.pid"
2505
pidfile = None
2110
tcp_server = MandosServer((server_settings["address"],
2111
server_settings["port"]),
2112
ClientHandler,
2113
interface=(server_settings["interface"]
2114
or None),
2115
use_ipv6=use_ipv6,
2116
gnutls_priority=
2117
server_settings["priority"],
2118
use_dbus=use_dbus)
2119
if not debug:
2120
pidfilename = "/var/run/mandos.pid"
2506
2121
try:
2507
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
2508
except IOError as e:
2509
logger.error("Could not open file %r", pidfilename,
2510
exc_info=e)
2122
pidfile = open(pidfilename, "w")
2123
except IOError:
2124
logger.error("Could not open file %r", pidfilename)
2511
2125
2512
for name in ("_mandos", "mandos", "nobody"):
2126
try:
2127
uid = pwd.getpwnam("_mandos").pw_uid
2128
gid = pwd.getpwnam("_mandos").pw_gid
2129
except KeyError:
2513
2130
try:
2514
uid = pwd.getpwnam(name).pw_uid
2515
gid = pwd.getpwnam(name).pw_gid
2516
break
2131
uid = pwd.getpwnam("mandos").pw_uid
2132
gid = pwd.getpwnam("mandos").pw_gid
2517
2133
except KeyError:
2518
continue
2519
else:
2520
uid = 65534
2521
gid = 65534
2134
try:
2135
uid = pwd.getpwnam("nobody").pw_uid
2136
gid = pwd.getpwnam("nobody").pw_gid
2137
except KeyError:
2138
uid = 65534
2139
gid = 65534
2522
2140
try:
2523
2141
os.setgid(gid)
2524
2142
os.setuid(uid)
2525
2143
except OSError as error:
2526
if error.errno != errno.EPERM:
2527
raise
2144
if error[0] != errno.EPERM:
2145
raise error
2528
2146
2529
2147
if debug:
2530
2148
# Enable all possible GnuTLS debugging
2537
2155
def debug_gnutls(level, string):
2538
2156
logger.debug("GnuTLS: %s", string[:-1])
2539
2157
2540
gnutls.library.functions.gnutls_global_set_log_function(
2541
debug_gnutls)
2158
(gnutls.library.functions
2159
.gnutls_global_set_log_function(debug_gnutls))
2542
2160
2543
2161
# Redirect stdin so all checkers get /dev/null
2544
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2162
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2545
2163
os.dup2(null, sys.stdin.fileno())
2546
2164
if null > 2:
2547
2165
os.close(null)
2548
2166
2549
2167
# Need to fork before connecting to D-Bus
2550
if not foreground:
2168
if not debug:
2551
2169
# Close all input and output, do double fork, etc.
2552
2170
daemon()
2553
2171
2554
# multiprocessing will use threads, so before we use gobject we
2555
# need to inform gobject that threads will be used.
2556
2172
gobject.threads_init()
2557
2173
2558
2174
global main_loop
2559
2175
# From the Avahi example code
2560
DBusGMainLoop(set_as_default=True)
2176
DBusGMainLoop(set_as_default=True )
2561
2177
main_loop = gobject.MainLoop()
2562
2178
bus = dbus.SystemBus()
2563
2179
# End of Avahi example code
2564
2180
if use_dbus:
2565
2181
try:
2566
2182
bus_name = dbus.service.BusName("se.recompile.Mandos",
2567
bus,
2568
do_not_queue=True)
2569
old_bus_name = dbus.service.BusName(
2570
"se.bsnet.fukt.Mandos", bus,
2571
do_not_queue=True)
2572
except dbus.exceptions.DBusException as e:
2573
logger.error("Disabling D-Bus:", exc_info=e)
2183
bus, do_not_queue=True)
2184
old_bus_name = (dbus.service.BusName
2185
("se.bsnet.fukt.Mandos", bus,
2186
do_not_queue=True))
2187
except dbus.exceptions.NameExistsException as e:
2188
logger.error(unicode(e) + ", disabling D-Bus")
2574
2189
use_dbus = False
2575
2190
server_settings["use_dbus"] = False
2576
2191
tcp_server.use_dbus = False
2577
if zeroconf:
2578
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2579
service = AvahiServiceToSyslog(
2580
name = server_settings["servicename"],
2581
servicetype = "_mandos._tcp",
2582
protocol = protocol,
2583
bus = bus)
2584
if server_settings["interface"]:
2585
service.interface = if_nametoindex(
2586
server_settings["interface"].encode("utf-8"))
2192
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2193
service = AvahiServiceToSyslog(name =
2194
server_settings["servicename"],
2195
servicetype = "_mandos._tcp",
2196
protocol = protocol, bus = bus)
2197
if server_settings["interface"]:
2198
service.interface = (if_nametoindex
2199
(str(server_settings["interface"])))
2587
2200
2588
2201
global multiprocessing_manager
2589
2202
multiprocessing_manager = multiprocessing.Manager()
2590
2203
2591
2204
client_class = Client
2592
2205
if use_dbus:
2593
client_class = functools.partial(ClientDBus, bus = bus)
2206
client_class = functools.partial(ClientDBusTransitional,
2207
bus = bus)
2594
2208
2595
2209
client_settings = Client.config_parser(client_config)
2596
2210
old_client_settings = {}
2597
2211
clients_data = {}
2598
2212
2599
# This is used to redirect stdout and stderr for checker processes
2600
global wnull
2601
wnull = open(os.devnull, "w") # A writable /dev/null
2602
# Only used if server is running in foreground but not in debug
2603
# mode
2604
if debug or not foreground:
2605
wnull.close()
2606
2607
2213
# Get client data and settings from last running state.
2608
2214
if server_settings["restore"]:
2609
2215
try:
2610
2216
with open(stored_state_path, "rb") as stored_state:
2611
clients_data, old_client_settings = pickle.load(
2612
stored_state)
2217
clients_data, old_client_settings = (pickle.load
2218
(stored_state))
2613
2219
os.remove(stored_state_path)
2614
2220
except IOError as e:
2615
if e.errno == errno.ENOENT:
2616
logger.warning("Could not load persistent state:"
2617
" {}".format(os.strerror(e.errno)))
2618
else:
2619
logger.critical("Could not load persistent state:",
2620
exc_info=e)
2221
logger.warning("Could not load persistent state: {0}"
2222
.format(e))
2223
if e.errno != errno.ENOENT:
2621
2224
raise
2622
2225
except EOFError as e:
2623
2226
logger.warning("Could not load persistent state: "
2624
"EOFError:",
2625
exc_info=e)
2227
"EOFError: {0}".format(e))
2626
2228
2627
2229
with PGPEngine() as pgp:
2628
for client_name, client in clients_data.items():
2629
# Skip removed clients
2630
if client_name not in client_settings:
2631
continue
2632
2230
for client_name, client in clients_data.iteritems():
2633
2231
# Decide which value to use after restoring saved state.
2634
2232
# We have three different values: Old config file,
2635
2233
# new config file, and saved state.
2640
2238
# For each value in new config, check if it
2641
2239
# differs from the old config value (Except for
2642
2240
# the "secret" attribute)
2643
if (name != "secret"
2644
and (value !=
2645
old_client_settings[client_name][name])):
2241
if (name != "secret" and
2242
value != old_client_settings[client_name]
2243
[name]):
2646
2244
client[name] = value
2647
2245
except KeyError:
2648
2246
pass
2649
2247
2650
2248
# Clients who has passed its expire date can still be
2651
# enabled if its last checker was successful. A Client
2249
# enabled if its last checker was successful. Clients
2652
2250
# whose checker succeeded before we stored its state is
2653
2251
# assumed to have successfully run all checkers during
2654
2252
# downtime.
2656
2254
if datetime.datetime.utcnow() >= client["expires"]:
2657
2255
if not client["last_checked_ok"]:
2658
2256
logger.warning(
2659
"disabling client {} - Client never "
2660
"performed a successful checker".format(
2661
client_name))
2257
"disabling client {0} - Client never "
2258
"performed a successful checker"
2259
.format(client_name))
2662
2260
client["enabled"] = False
2663
2261
elif client["last_checker_status"] != 0:
2664
2262
logger.warning(
2665
"disabling client {} - Client last"
2666
" checker failed with error code"
2667
" {}".format(
2668
client_name,
2669
client["last_checker_status"]))
2263
"disabling client {0} - Client "
2264
"last checker failed with error code {1}"
2265
.format(client_name,
2266
client["last_checker_status"]))
2670
2267
client["enabled"] = False
2671
2268
else:
2672
client["expires"] = (
2673
datetime.datetime.utcnow()
2674
+ client["timeout"])
2269
client["expires"] = (datetime.datetime
2270
.utcnow()
2271
+ client["timeout"])
2675
2272
logger.debug("Last checker succeeded,"
2676
" keeping {} enabled".format(
2677
client_name))
2273
" keeping {0} enabled"
2274
.format(client_name))
2678
2275
try:
2679
client["secret"] = pgp.decrypt(
2680
client["encrypted_secret"],
2681
client_settings[client_name]["secret"])
2276
client["secret"] = (
2277
pgp.decrypt(client["encrypted_secret"],
2278
client_settings[client_name]
2279
["secret"]))
2682
2280
except PGPError:
2683
2281
# If decryption fails, we use secret from new settings
2684
logger.debug("Failed to decrypt {} old secret".format(
2685
client_name))
2686
client["secret"] = (client_settings[client_name]
2687
["secret"])
2282
logger.debug("Failed to decrypt {0} old secret"
2283
.format(client_name))
2284
client["secret"] = (
2285
client_settings[client_name]["secret"])
2286
2688
2287
2689
2288
# Add/remove clients based on new changes made to config
2690
2289
for client_name in (set(old_client_settings)
2693
2292
for client_name in (set(client_settings)
2694
2293
- set(old_client_settings)):
2695
2294
clients_data[client_name] = client_settings[client_name]
2696
2295
2697
2296
# Create all client objects
2698
for client_name, client in clients_data.items():
2297
for client_name, client in clients_data.iteritems():
2699
2298
tcp_server.clients[client_name] = client_class(
2700
name = client_name,
2701
settings = client,
2702
server_settings = server_settings)
2299
name = client_name, settings = client)
2703
2300
2704
2301
if not tcp_server.clients:
2705
2302
logger.warning("No clients defined")
2706
2707
if not foreground:
2708
if pidfile is not None:
2709
pid = os.getpid()
2710
try:
2711
with pidfile:
2712
print(pid, file=pidfile)
2713
except IOError:
2714
logger.error("Could not write to file %r with PID %d",
2715
pidfilename, pid)
2716
del pidfile
2303
2304
if not debug:
2305
try:
2306
with pidfile:
2307
pid = os.getpid()
2308
pidfile.write(str(pid) + "\n".encode("utf-8"))
2309
del pidfile
2310
except IOError:
2311
logger.error("Could not write to file %r with PID %d",
2312
pidfilename, pid)
2313
except NameError:
2314
# "pidfile" was never created
2315
pass
2717
2316
del pidfilename
2317
signal.signal(signal.SIGINT, signal.SIG_IGN)
2718
2318
2719
2319
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2720
2320
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2721
2321
2722
2322
if use_dbus:
2723
2724
@alternate_dbus_interfaces(
2725
{ "se.recompile.Mandos": "se.bsnet.fukt.Mandos" })
2726
class MandosDBusService(DBusObjectWithProperties):
2323
class MandosDBusService(dbus.service.Object):
2727
2324
"""A D-Bus proxy object"""
2728
2729
2325
def __init__(self):
2730
2326
dbus.service.Object.__init__(self, bus, "/")
2731
2732
2327
_interface = "se.recompile.Mandos"
2733
2328
2734
@dbus_interface_annotations(_interface)
2735
def _foo(self):
2736
return {
2737
"org.freedesktop.DBus.Property.EmitsChangedSignal":
2738
"false" }
2739
2740
2329
@dbus.service.signal(_interface, signature="o")
2741
2330
def ClientAdded(self, objpath):
2742
2331
"D-Bus signal"
2755
2344
@dbus.service.method(_interface, out_signature="ao")
2756
2345
def GetAllClients(self):
2757
2346
"D-Bus method"
2758
return dbus.Array(c.dbus_object_path for c in
2347
return dbus.Array(c.dbus_object_path
2348
for c in
2759
2349
tcp_server.clients.itervalues())
2760
2350
2761
2351
@dbus.service.method(_interface,
2763
2353
def GetAllClientsWithProperties(self):
2764
2354
"D-Bus method"
2765
2355
return dbus.Dictionary(
2766
{ c.dbus_object_path: c.GetAll("")
2767
for c in tcp_server.clients.itervalues() },
2356
((c.dbus_object_path, c.GetAll(""))
2357
for c in tcp_server.clients.itervalues()),
2768
2358
signature="oa{sv}")
2769
2359
2770
2360
@dbus.service.method(_interface, in_signature="o")
2783
2373
2784
2374
del _interface
2785
2375
2786
mandos_dbus_service = MandosDBusService()
2376
class MandosDBusServiceTransitional(MandosDBusService):
2377
__metaclass__ = AlternateDBusNamesMetaclass
2378
mandos_dbus_service = MandosDBusServiceTransitional()
2787
2379
2788
2380
def cleanup():
2789
2381
"Cleanup function; run on exit"
2790
if zeroconf:
2791
service.cleanup()
2382
service.cleanup()
2792
2383
2793
2384
multiprocessing.active_children()
2794
wnull.close()
2795
2385
if not (tcp_server.clients or client_settings):
2796
2386
return
2797
2387
2808
2398
2809
2399
# A list of attributes that can not be pickled
2810
2400
# + secret.
2811
exclude = { "bus", "changedstate", "secret",
2812
"checker", "server_settings" }
2813
for name, typ in inspect.getmembers(dbus.service
2814
.Object):
2401
exclude = set(("bus", "changedstate", "secret",
2402
"checker"))
2403
for name, typ in (inspect.getmembers
2404
(dbus.service.Object)):
2815
2405
exclude.add(name)
2816
2406
2817
2407
client_dict["encrypted_secret"] = (client
2824
2414
del client_settings[client.name]["secret"]
2825
2415
2826
2416
try:
2827
with tempfile.NamedTemporaryFile(
2828
mode='wb',
2829
suffix=".pickle",
2830
prefix='clients-',
2831
dir=os.path.dirname(stored_state_path),
2832
delete=False) as stored_state:
2417
tempfd, tempname = tempfile.mkstemp(suffix=".pickle",
2418
prefix="clients-",
2419
dir=os.path.dirname
2420
(stored_state_path))
2421
with os.fdopen(tempfd, "wb") as stored_state:
2833
2422
pickle.dump((clients, client_settings), stored_state)
2834
tempname = stored_state.name
2835
2423
os.rename(tempname, stored_state_path)
2836
2424
except (IOError, OSError) as e:
2425
logger.warning("Could not save persistent state: {0}"
2426
.format(e))
2837
2427
if not debug:
2838
2428
try:
2839
2429
os.remove(tempname)
2840
2430
except NameError:
2841
2431
pass
2842
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
2843
logger.warning("Could not save persistent state: {}"
2844
.format(os.strerror(e.errno)))
2845
else:
2846
logger.warning("Could not save persistent state:",
2847
exc_info=e)
2848
raise
2432
if e.errno not in set((errno.ENOENT, errno.EACCES,
2433
errno.EEXIST)):
2434
raise e
2849
2435
2850
2436
# Delete all clients, and settings from config
2851
2437
while tcp_server.clients:
2856
2442
client.disable(quiet=True)
2857
2443
if use_dbus:
2858
2444
# Emit D-Bus signal
2859
mandos_dbus_service.ClientRemoved(
2860
client.dbus_object_path, client.name)
2445
mandos_dbus_service.ClientRemoved(client
2446
.dbus_object_path,
2447
client.name)
2861
2448
client_settings.clear()
2862
2449
2863
2450
atexit.register(cleanup)
2874
2461
tcp_server.server_activate()
2875
2462
2876
2463
# Find out what port we got
2877
if zeroconf:
2878
service.port = tcp_server.socket.getsockname()[1]
2464
service.port = tcp_server.socket.getsockname()[1]
2879
2465
if use_ipv6:
2880
2466
logger.info("Now listening on address %r, port %d,"
2881
" flowinfo %d, scope_id %d",
2882
*tcp_server.socket.getsockname())
2467
" flowinfo %d, scope_id %d"
2468
% tcp_server.socket.getsockname())
2883
2469
else: # IPv4
2884
logger.info("Now listening on address %r, port %d",
2885
*tcp_server.socket.getsockname())
2470
logger.info("Now listening on address %r, port %d"
2471
% tcp_server.socket.getsockname())
2886
2472
2887
2473
#service.interface = tcp_server.socket.getsockname()[3]
2888
2474
2889
2475
try:
2890
if zeroconf:
2891
# From the Avahi example code
2892
try:
2893
service.activate()
2894
except dbus.exceptions.DBusException as error:
2895
logger.critical("D-Bus Exception", exc_info=error)
2896
cleanup()
2897
sys.exit(1)
2898
# End of Avahi example code
2476
# From the Avahi example code
2477
try:
2478
service.activate()
2479
except dbus.exceptions.DBusException as error:
2480
logger.critical("DBusException: %s", error)
2481
cleanup()
2482
sys.exit(1)
2483
# End of Avahi example code
2899
2484
2900
2485
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2901
2486
lambda *args, **kwargs:
2905
2490
logger.debug("Starting main loop")
2906
2491
main_loop.run()
2907
2492
except AvahiError as error:
2908
logger.critical("Avahi Error", exc_info=error)
2493
logger.critical("AvahiError: %s", error)
2909
2494
cleanup()
2910
2495
sys.exit(1)
2911
2496
except KeyboardInterrupt:
2916
2501
# Must run before the D-Bus bus name gets deregistered
2917
2502
cleanup()
2918
2503
2919
2920
2504
if __name__ == '__main__':
2921
2505
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0