To get this branch, use:
bzr branch
http://bzr.recompile.se/loggerhead/mandos/trunk
« back to all changes in this revision
Viewing changes to mandos
- browse files at revision 502
- compare with another revision
- download diff
- download tarball
- view history from revision 502
- Committer: Teddy Hogeborn
- Date: 2011-09-26 19:36:18 UTC
- mfrom: (24.1.184 mandos)
- Revision ID: teddy@fukt.bsnet.se-20110926193618-vtj5c9hena1maixx
Merge from Björn
- files removed:
- debian/mandos-client.examples
- debian/upstream
- network-hooks.d
- 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 © 2008-2011 Teddy Hogeborn
15
# Copyright © 2008-2011 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
28
28
# along with this program. If not, see
29
29
# <http://www.gnu.org/licenses/>.
30
30
#
31
# Contact the authors at <mandos@recompile.se>.
31
# Contact the authors at <mandos@fukt.bsnet.se>.
32
32
#
33
33
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
import types
77
import binascii
78
import tempfile
79
import itertools
80
import collections
81
import codecs
82
65
83
66
import dbus
84
67
import dbus.service
85
try:
86
import gobject
87
except ImportError:
88
from gi.repository import GObject as gobject
68
import gobject
89
69
import avahi
90
70
from dbus.mainloop.glib import DBusGMainLoop
91
71
import ctypes
101
81
except ImportError:
102
82
SO_BINDTODEVICE = None
103
83
104
if sys.version_info.major == 2:
105
str = unicode
106
107
version = "1.6.9"
108
stored_state_file = "clients.pickle"
109
110
logger = logging.getLogger()
111
syslogger = None
112
113
try:
114
if_nametoindex = ctypes.cdll.LoadLibrary(
115
ctypes.util.find_library("c")).if_nametoindex
116
except (OSError, AttributeError):
117
118
def if_nametoindex(interface):
119
"Get an interface index the hard way, i.e. using fcntl()"
120
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
121
with contextlib.closing(socket.socket()) as s:
122
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
123
struct.pack(b"16s16x", interface))
124
interface_index = struct.unpack("I", ifreq[16:20])[0]
125
return interface_index
126
127
128
def initlogger(debug, level=logging.WARNING):
129
"""init logger and add loglevel"""
130
131
global syslogger
132
syslogger = (logging.handlers.SysLogHandler(
133
facility = logging.handlers.SysLogHandler.LOG_DAEMON,
134
address = "/dev/log"))
135
syslogger.setFormatter(logging.Formatter
136
('Mandos [%(process)d]: %(levelname)s:'
137
' %(message)s'))
138
logger.addHandler(syslogger)
139
140
if debug:
141
console = logging.StreamHandler()
142
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
143
' [%(process)d]:'
144
' %(levelname)s:'
145
' %(message)s'))
146
logger.addHandler(console)
147
logger.setLevel(level)
148
149
150
class PGPError(Exception):
151
"""Exception if encryption/decryption fails"""
152
pass
153
154
155
class PGPEngine(object):
156
"""A simple class for OpenPGP symmetric encryption & decryption"""
157
158
def __init__(self):
159
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
160
self.gnupgargs = ['--batch',
161
'--home', self.tempdir,
162
'--force-mdc',
163
'--quiet',
164
'--no-use-agent']
165
166
def __enter__(self):
167
return self
168
169
def __exit__(self, exc_type, exc_value, traceback):
170
self._cleanup()
171
return False
172
173
def __del__(self):
174
self._cleanup()
175
176
def _cleanup(self):
177
if self.tempdir is not None:
178
# Delete contents of tempdir
179
for root, dirs, files in os.walk(self.tempdir,
180
topdown = False):
181
for filename in files:
182
os.remove(os.path.join(root, filename))
183
for dirname in dirs:
184
os.rmdir(os.path.join(root, dirname))
185
# Remove tempdir
186
os.rmdir(self.tempdir)
187
self.tempdir = None
188
189
def password_encode(self, password):
190
# Passphrase can not be empty and can not contain newlines or
191
# 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
199
200
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)
216
return ciphertext
217
218
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)
234
return decrypted_plaintext
235
84
85
version = "1.3.1"
86
87
#logger = logging.getLogger('mandos')
88
logger = logging.Logger('mandos')
89
syslogger = (logging.handlers.SysLogHandler
90
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
91
address = str("/dev/log")))
92
syslogger.setFormatter(logging.Formatter
93
('Mandos [%(process)d]: %(levelname)s:'
94
' %(message)s'))
95
logger.addHandler(syslogger)
96
97
console = logging.StreamHandler()
98
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
99
' %(levelname)s:'
100
' %(message)s'))
101
logger.addHandler(console)
236
102
237
103
class AvahiError(Exception):
238
104
def __init__(self, value, *args, **kwargs):
239
105
self.value = value
240
return super(AvahiError, self).__init__(value, *args,
241
**kwargs)
242
106
super(AvahiError, self).__init__(value, *args, **kwargs)
107
def __unicode__(self):
108
return unicode(repr(self.value))
243
109
244
110
class AvahiServiceError(AvahiError):
245
111
pass
246
112
247
248
113
class AvahiGroupError(AvahiError):
249
114
pass
250
115
257
122
Used to optionally bind to the specified interface.
258
123
name: string; Example: 'Mandos'
259
124
type: string; Example: '_mandos._tcp'.
260
See <https://www.iana.org/assignments/service-names-port-numbers>
125
See <http://www.dns-sd.org/ServiceTypes.html>
261
126
port: integer; what port to announce
262
127
TXT: list of strings; TXT record for the service
263
128
domain: string; Domain to publish on, default to .local if empty.
269
134
server: D-Bus Server
270
135
bus: dbus.SystemBus()
271
136
"""
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):
137
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
138
servicetype = None, port = None, TXT = None,
139
domain = "", host = "", max_renames = 32768,
140
protocol = avahi.PROTO_UNSPEC, bus = None):
284
141
self.interface = interface
285
142
self.name = name
286
143
self.type = servicetype
295
152
self.server = None
296
153
self.bus = bus
297
154
self.entry_group_state_changed_match = None
298
299
def rename(self, remove=True):
155
def rename(self):
300
156
"""Derived from the Avahi example code"""
301
157
if self.rename_count >= self.max_renames:
302
158
logger.critical("No suitable Zeroconf service name found"
303
159
" after %i retries, exiting.",
304
160
self.rename_count)
305
161
raise AvahiServiceError("Too many renames")
306
self.name = str(
307
self.server.GetAlternativeServiceName(self.name))
308
self.rename_count += 1
162
self.name = unicode(self.server.GetAlternativeServiceName(self.name))
309
163
logger.info("Changing Zeroconf service name to %r ...",
310
164
self.name)
311
if remove:
312
self.remove()
165
syslogger.setFormatter(logging.Formatter
166
('Mandos (%s) [%%(process)d]:'
167
' %%(levelname)s: %%(message)s'
168
% self.name))
169
self.remove()
313
170
try:
314
171
self.add()
315
172
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
173
logger.critical("DBusException: %s", error)
174
self.cleanup()
175
os._exit(1)
176
self.rename_count += 1
325
177
def remove(self):
326
178
"""Derived from the Avahi example code"""
327
179
if self.entry_group_state_changed_match is not None:
329
181
self.entry_group_state_changed_match = None
330
182
if self.group is not None:
331
183
self.group.Reset()
332
333
184
def add(self):
334
185
"""Derived from the Avahi example code"""
335
186
self.remove()
340
191
avahi.DBUS_INTERFACE_ENTRY_GROUP)
341
192
self.entry_group_state_changed_match = (
342
193
self.group.connect_to_signal(
343
'StateChanged', self.entry_group_state_changed))
194
'StateChanged', self .entry_group_state_changed))
344
195
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
345
196
self.name, self.type)
346
197
self.group.AddService(
352
203
dbus.UInt16(self.port),
353
204
avahi.string_array_to_txt_array(self.TXT))
354
205
self.group.Commit()
355
356
206
def entry_group_state_changed(self, state, error):
357
207
"""Derived from the Avahi example code"""
358
208
logger.debug("Avahi entry group state change: %i", state)
364
214
self.rename()
365
215
elif state == avahi.ENTRY_GROUP_FAILURE:
366
216
logger.critical("Avahi: Error in group state changed %s",
367
str(error))
368
raise AvahiGroupError("State changed: {!s}".format(error))
369
217
unicode(error))
218
raise AvahiGroupError("State changed: %s"
219
% unicode(error))
370
220
def cleanup(self):
371
221
"""Derived from the Avahi example code"""
372
222
if self.group is not None:
373
223
try:
374
224
self.group.Free()
375
225
except (dbus.exceptions.UnknownMethodException,
376
dbus.exceptions.DBusException):
226
dbus.exceptions.DBusException) as e:
377
227
pass
378
228
self.group = None
379
229
self.remove()
380
381
230
def server_state_changed(self, state, error=None):
382
231
"""Derived from the Avahi example code"""
383
232
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
}
233
bad_states = { avahi.SERVER_INVALID:
234
"Zeroconf server invalid",
235
avahi.SERVER_REGISTERING: None,
236
avahi.SERVER_COLLISION:
237
"Zeroconf server name collision",
238
avahi.SERVER_FAILURE:
239
"Zeroconf server failure" }
390
240
if state in bad_states:
391
241
if bad_states[state] is not None:
392
242
if error is None:
401
251
logger.debug("Unknown state: %r", state)
402
252
else:
403
253
logger.debug("Unknown state: %r: %r", state, error)
404
405
254
def activate(self):
406
255
"""Derived from the Avahi example code"""
407
256
if self.server is None:
411
260
follow_name_owner_changes=True),
412
261
avahi.DBUS_INTERFACE_SERVER)
413
262
self.server.connect_to_signal("StateChanged",
414
self.server_state_changed)
263
self.server_state_changed)
415
264
self.server_state_changed(self.server.GetState())
416
265
417
266
418
class AvahiServiceToSyslog(AvahiService):
419
def rename(self, *args, **kwargs):
420
"""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)))
425
return ret
426
427
267
def _timedelta_to_milliseconds(td):
268
"Convert a datetime.timedelta() to milliseconds"
269
return ((td.days * 24 * 60 * 60 * 1000)
270
+ (td.seconds * 1000)
271
+ (td.microseconds // 1000))
272
428
273
class Client(object):
429
274
"""A representation of a client host served by this server.
430
275
431
276
Attributes:
432
approved: bool(); 'None' if not yet approved/disapproved
277
_approved: bool(); 'None' if not yet approved/disapproved
433
278
approval_delay: datetime.timedelta(); Time to wait for approval
434
279
approval_duration: datetime.timedelta(); Duration of one approval
435
280
checker: subprocess.Popen(); a running checker process used
442
287
instance %(name)s can be used in the command.
443
288
checker_initiator_tag: a gobject event source tag, or None
444
289
created: datetime.datetime(); (UTC) object creation
445
client_structure: Object describing what attributes a client has
446
and is used for storing the client at exit
447
290
current_checker_command: string; current running checker_command
291
disable_hook: If set, called by disable() as disable_hook(self)
448
292
disable_initiator_tag: a gobject event source tag, or None
449
293
enabled: bool()
450
294
fingerprint: string (40 or 32 hexadecimal digits); used to
453
297
interval: datetime.timedelta(); How often to start a new checker
454
298
last_approval_request: datetime.datetime(); (UTC) or None
455
299
last_checked_ok: datetime.datetime(); (UTC) or None
456
last_checker_status: integer between 0 and 255 reflecting exit
457
status of last checker. -1 reflects crashed
458
checker, -2 means no checker completed yet.
459
last_enabled: datetime.datetime(); (UTC) or None
300
last_enabled: datetime.datetime(); (UTC)
460
301
name: string; from the config file, used in log messages and
461
302
D-Bus identifiers
462
303
secret: bytestring; sent verbatim (over TLS) to client
463
304
timeout: datetime.timedelta(); How long from last_checked_ok
464
305
until this client is disabled
465
extended_timeout: extra long timeout when secret has been sent
306
extended_timeout: extra long timeout when password has been sent
466
307
runtime_expansions: Allowed attributes for runtime expansion.
467
308
expires: datetime.datetime(); time (UTC) when a client will be
468
309
disabled, or None
469
server_settings: The server_settings dict from main()
470
310
"""
471
311
472
312
runtime_expansions = ("approval_delay", "approval_duration",
473
"created", "enabled", "expires",
474
"fingerprint", "host", "interval",
475
"last_approval_request", "last_checked_ok",
313
"created", "enabled", "fingerprint",
314
"host", "interval", "last_checked_ok",
476
315
"last_enabled", "name", "timeout")
477
client_defaults = {
478
"timeout": "PT5M",
479
"extended_timeout": "PT15M",
480
"interval": "PT2M",
481
"checker": "fping -q -- %%(host)s",
482
"host": "",
483
"approval_delay": "PT0S",
484
"approval_duration": "PT1S",
485
"approved_by_default": "True",
486
"enabled": "True",
487
}
488
489
@staticmethod
490
def config_parser(config):
491
"""Construct a new dict of client settings of this form:
492
{ client_name: {setting_name: value, ...}, ...}
493
with exceptions for any special settings as defined above.
494
NOTE: Must be a pure function. Must return the same result
495
value given the same arguments.
496
"""
497
settings = {}
498
for client_name in config.sections():
499
section = dict(config.items(client_name))
500
client = settings[client_name] = {}
501
502
client["host"] = section["host"]
503
# Reformat values from string types to Python types
504
client["approved_by_default"] = config.getboolean(
505
client_name, "approved_by_default")
506
client["enabled"] = config.getboolean(client_name,
507
"enabled")
508
509
# Uppercase and remove spaces from fingerprint for later
510
# comparison purposes with return value from the
511
# fingerprint() function
512
client["fingerprint"] = (section["fingerprint"].upper()
513
.replace(" ", ""))
514
if "secret" in section:
515
client["secret"] = section["secret"].decode("base64")
516
elif "secfile" in section:
517
with open(os.path.expanduser(os.path.expandvars
518
(section["secfile"])),
519
"rb") as secfile:
520
client["secret"] = secfile.read()
521
else:
522
raise TypeError("No secret or secfile for section {}"
523
.format(section))
524
client["timeout"] = string_to_delta(section["timeout"])
525
client["extended_timeout"] = string_to_delta(
526
section["extended_timeout"])
527
client["interval"] = string_to_delta(section["interval"])
528
client["approval_delay"] = string_to_delta(
529
section["approval_delay"])
530
client["approval_duration"] = string_to_delta(
531
section["approval_duration"])
532
client["checker_command"] = section["checker"]
533
client["last_approval_request"] = None
534
client["last_checked_ok"] = None
535
client["last_checker_status"] = -2
536
316
537
return settings
538
539
def __init__(self, settings, name = None, server_settings=None):
317
def timeout_milliseconds(self):
318
"Return the 'timeout' attribute in milliseconds"
319
return _timedelta_to_milliseconds(self.timeout)
320
321
def extended_timeout_milliseconds(self):
322
"Return the 'extended_timeout' attribute in milliseconds"
323
return _timedelta_to_milliseconds(self.extended_timeout)
324
325
def interval_milliseconds(self):
326
"Return the 'interval' attribute in milliseconds"
327
return _timedelta_to_milliseconds(self.interval)
328
329
def approval_delay_milliseconds(self):
330
return _timedelta_to_milliseconds(self.approval_delay)
331
332
def __init__(self, name = None, disable_hook=None, config=None):
333
"""Note: the 'checker' key in 'config' sets the
334
'checker_command' attribute and *not* the 'checker'
335
attribute."""
540
336
self.name = name
541
if server_settings is None:
542
server_settings = {}
543
self.server_settings = server_settings
544
# adding all client settings
545
for setting, value in settings.items():
546
setattr(self, setting, value)
547
548
if self.enabled:
549
if not hasattr(self, "last_enabled"):
550
self.last_enabled = datetime.datetime.utcnow()
551
if not hasattr(self, "expires"):
552
self.expires = (datetime.datetime.utcnow()
553
+ self.timeout)
554
else:
555
self.last_enabled = None
556
self.expires = None
557
337
if config is None:
338
config = {}
558
339
logger.debug("Creating client %r", self.name)
340
# Uppercase and remove spaces from fingerprint for later
341
# comparison purposes with return value from the fingerprint()
342
# function
343
self.fingerprint = (config["fingerprint"].upper()
344
.replace(" ", ""))
559
345
logger.debug(" Fingerprint: %s", self.fingerprint)
560
self.created = settings.get("created",
561
datetime.datetime.utcnow())
562
563
# attributes specific for this server instance
346
if "secret" in config:
347
self.secret = config["secret"].decode("base64")
348
elif "secfile" in config:
349
with open(os.path.expanduser(os.path.expandvars
350
(config["secfile"])),
351
"rb") as secfile:
352
self.secret = secfile.read()
353
else:
354
raise TypeError("No secret or secfile for client %s"
355
% self.name)
356
self.host = config.get("host", "")
357
self.created = datetime.datetime.utcnow()
358
self.enabled = False
359
self.last_approval_request = None
360
self.last_enabled = None
361
self.last_checked_ok = None
362
self.timeout = string_to_delta(config["timeout"])
363
self.extended_timeout = string_to_delta(config["extended_timeout"])
364
self.interval = string_to_delta(config["interval"])
365
self.disable_hook = disable_hook
564
366
self.checker = None
565
367
self.checker_initiator_tag = None
566
368
self.disable_initiator_tag = None
369
self.expires = None
567
370
self.checker_callback_tag = None
371
self.checker_command = config["checker"]
568
372
self.current_checker_command = None
569
self.approved = None
373
self.last_connect = None
374
self._approved = None
375
self.approved_by_default = config.get("approved_by_default",
376
True)
570
377
self.approvals_pending = 0
571
self.changedstate = multiprocessing_manager.Condition(
572
multiprocessing_manager.Lock())
573
self.client_structure = [attr
574
for attr in self.__dict__.iterkeys()
575
if not attr.startswith("_")]
576
self.client_structure.append("client_structure")
577
578
for name, t in inspect.getmembers(
579
type(self), lambda obj: isinstance(obj, property)):
580
if not name.startswith("_"):
581
self.client_structure.append(name)
378
self.approval_delay = string_to_delta(
379
config["approval_delay"])
380
self.approval_duration = string_to_delta(
381
config["approval_duration"])
382
self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())
582
383
583
# Send notice to process children that client state has changed
584
384
def send_changedstate(self):
585
with self.changedstate:
586
self.changedstate.notify_all()
587
385
self.changedstate.acquire()
386
self.changedstate.notify_all()
387
self.changedstate.release()
388
588
389
def enable(self):
589
390
"""Start this client's checker and timeout hooks"""
590
391
if getattr(self, "enabled", False):
591
392
# Already enabled
592
393
return
394
self.send_changedstate()
395
# Schedule a new checker to be started an 'interval' from now,
396
# and every interval from then on.
397
self.checker_initiator_tag = (gobject.timeout_add
398
(self.interval_milliseconds(),
399
self.start_checker))
400
# Schedule a disable() when 'timeout' has passed
593
401
self.expires = datetime.datetime.utcnow() + self.timeout
402
self.disable_initiator_tag = (gobject.timeout_add
403
(self.timeout_milliseconds(),
404
self.disable))
594
405
self.enabled = True
595
406
self.last_enabled = datetime.datetime.utcnow()
596
self.init_checker()
597
self.send_changedstate()
407
# Also start a new checker *right now*.
408
self.start_checker()
598
409
599
410
def disable(self, quiet=True):
600
411
"""Disable this client."""
601
412
if not getattr(self, "enabled", False):
602
413
return False
603
414
if not quiet:
415
self.send_changedstate()
416
if not quiet:
604
417
logger.info("Disabling client %s", self.name)
605
if getattr(self, "disable_initiator_tag", None) is not None:
418
if getattr(self, "disable_initiator_tag", False):
606
419
gobject.source_remove(self.disable_initiator_tag)
607
420
self.disable_initiator_tag = None
608
421
self.expires = None
609
if getattr(self, "checker_initiator_tag", None) is not None:
422
if getattr(self, "checker_initiator_tag", False):
610
423
gobject.source_remove(self.checker_initiator_tag)
611
424
self.checker_initiator_tag = None
612
425
self.stop_checker()
426
if self.disable_hook:
427
self.disable_hook(self)
613
428
self.enabled = False
614
if not quiet:
615
self.send_changedstate()
616
429
# Do not run this again if called by a gobject.timeout_add
617
430
return False
618
431
619
432
def __del__(self):
433
self.disable_hook = None
620
434
self.disable()
621
435
622
def init_checker(self):
623
# Schedule a new checker to be started an 'interval' from now,
624
# and every interval from then on.
625
if self.checker_initiator_tag is not None:
626
gobject.source_remove(self.checker_initiator_tag)
627
self.checker_initiator_tag = gobject.timeout_add(
628
int(self.interval.total_seconds() * 1000),
629
self.start_checker)
630
# Schedule a disable() when 'timeout' has passed
631
if self.disable_initiator_tag is not None:
632
gobject.source_remove(self.disable_initiator_tag)
633
self.disable_initiator_tag = gobject.timeout_add(
634
int(self.timeout.total_seconds() * 1000), self.disable)
635
# Also start a new checker *right now*.
636
self.start_checker()
637
638
436
def checker_callback(self, pid, condition, command):
639
437
"""The checker has completed, so take appropriate actions."""
640
438
self.checker_callback_tag = None
641
439
self.checker = None
642
440
if os.WIFEXITED(condition):
643
self.last_checker_status = os.WEXITSTATUS(condition)
644
if self.last_checker_status == 0:
441
exitstatus = os.WEXITSTATUS(condition)
442
if exitstatus == 0:
645
443
logger.info("Checker for %(name)s succeeded",
646
444
vars(self))
647
445
self.checked_ok()
648
446
else:
649
logger.info("Checker for %(name)s failed", vars(self))
447
logger.info("Checker for %(name)s failed",
448
vars(self))
650
449
else:
651
self.last_checker_status = -1
652
450
logger.warning("Checker for %(name)s crashed?",
653
451
vars(self))
654
452
655
def checked_ok(self):
656
"""Assert that the client has been seen, alive and well."""
657
self.last_checked_ok = datetime.datetime.utcnow()
658
self.last_checker_status = 0
659
self.bump_timeout()
660
661
def bump_timeout(self, timeout=None):
662
"""Bump up the timeout for this client."""
453
def checked_ok(self, timeout=None):
454
"""Bump up the timeout for this client.
455
456
This should only be called when the client has been seen,
457
alive and well.
458
"""
663
459
if timeout is None:
664
460
timeout = self.timeout
665
if self.disable_initiator_tag is not None:
666
gobject.source_remove(self.disable_initiator_tag)
667
self.disable_initiator_tag = None
668
if getattr(self, "enabled", False):
669
self.disable_initiator_tag = gobject.timeout_add(
670
int(timeout.total_seconds() * 1000), self.disable)
671
self.expires = datetime.datetime.utcnow() + timeout
461
self.last_checked_ok = datetime.datetime.utcnow()
462
gobject.source_remove(self.disable_initiator_tag)
463
self.expires = datetime.datetime.utcnow() + timeout
464
self.disable_initiator_tag = (gobject.timeout_add
465
(_timedelta_to_milliseconds(timeout),
466
self.disable))
672
467
673
468
def need_approval(self):
674
469
self.last_approval_request = datetime.datetime.utcnow()
679
474
If a checker already exists, leave it running and do
680
475
nothing."""
681
476
# The reason for not killing a running checker is that if we
682
# did that, and if a checker (for some reason) started running
683
# slowly and taking more than 'interval' time, then the client
684
# would inevitably timeout, since no checker would get a
685
# chance to run to completion. If we instead leave running
477
# did that, then if a checker (for some reason) started
478
# running slowly and taking more than 'interval' time, the
479
# client would inevitably timeout, since no checker would get
480
# a chance to run to completion. If we instead leave running
686
481
# checkers alone, the checker would have to take more time
687
482
# than 'timeout' for the client to be disabled, which is as it
688
483
# should be.
690
485
# If a checker exists, make sure it is not a zombie
691
486
try:
692
487
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
693
except AttributeError:
694
pass
695
except OSError as error:
696
if error.errno != errno.ECHILD:
697
raise
488
except (AttributeError, OSError) as error:
489
if (isinstance(error, OSError)
490
and error.errno != errno.ECHILD):
491
raise error
698
492
else:
699
493
if pid:
700
494
logger.warning("Checker was a zombie")
703
497
self.current_checker_command)
704
498
# Start a new checker if needed
705
499
if self.checker is None:
706
# Escape attributes for the shell
707
escaped_attrs = {
708
attr: re.escape(str(getattr(self, attr)))
709
for attr in self.runtime_expansions }
710
500
try:
711
command = self.checker_command % escaped_attrs
712
except TypeError as error:
713
logger.error('Could not format string "%s"',
714
self.checker_command,
715
exc_info=error)
716
return True # Try again later
501
# In case checker_command has exactly one % operator
502
command = self.checker_command % self.host
503
except TypeError:
504
# Escape attributes for the shell
505
escaped_attrs = dict(
506
(attr,
507
re.escape(unicode(str(getattr(self, attr, "")),
508
errors=
509
'replace')))
510
for attr in
511
self.runtime_expansions)
512
513
try:
514
command = self.checker_command % escaped_attrs
515
except TypeError as error:
516
logger.error('Could not format string "%s":'
517
' %s', self.checker_command, error)
518
return True # Try again later
717
519
self.current_checker_command = command
718
520
try:
719
logger.info("Starting checker %r for %s", command,
720
self.name)
521
logger.info("Starting checker %r for %s",
522
command, self.name)
721
523
# We don't need to redirect stdout and stderr, since
722
524
# in normal mode, that is already done by daemon(),
723
525
# and in debug mode we don't want to. (Stdin is
724
526
# always replaced by /dev/null.)
725
# The exception is when not debugging but nevertheless
726
# running in the foreground; use the previously
727
# created wnull.
728
popen_args = {}
729
if (not self.server_settings["debug"]
730
and self.server_settings["foreground"]):
731
popen_args.update({"stdout": wnull,
732
"stderr": wnull })
733
527
self.checker = subprocess.Popen(command,
734
528
close_fds=True,
735
shell=True,
736
cwd="/",
737
**popen_args)
738
except OSError as error:
739
logger.error("Failed to start subprocess",
740
exc_info=error)
741
return True
742
self.checker_callback_tag = gobject.child_watch_add(
743
self.checker.pid, self.checker_callback, data=command)
744
# The checker may have completed before the gobject
745
# watch was added. Check for this.
746
try:
529
shell=True, cwd="/")
530
self.checker_callback_tag = (gobject.child_watch_add
531
(self.checker.pid,
532
self.checker_callback,
533
data=command))
534
# The checker may have completed before the gobject
535
# watch was added. Check for this.
747
536
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
537
if pid:
538
gobject.source_remove(self.checker_callback_tag)
539
self.checker_callback(pid, status, command)
748
540
except OSError as error:
749
if error.errno == errno.ECHILD:
750
# This should never happen
751
logger.error("Child process vanished",
752
exc_info=error)
753
return True
754
raise
755
if pid:
756
gobject.source_remove(self.checker_callback_tag)
757
self.checker_callback(pid, status, command)
541
logger.error("Failed to start subprocess: %s",
542
error)
758
543
# Re-run this periodically if run by gobject.timeout_add
759
544
return True
760
545
767
552
return
768
553
logger.debug("Stopping checker for %(name)s", vars(self))
769
554
try:
770
self.checker.terminate()
555
os.kill(self.checker.pid, signal.SIGTERM)
771
556
#time.sleep(0.5)
772
557
#if self.checker.poll() is None:
773
# self.checker.kill()
558
# os.kill(self.checker.pid, signal.SIGKILL)
774
559
except OSError as error:
775
560
if error.errno != errno.ESRCH: # No such process
776
561
raise
777
562
self.checker = None
778
563
779
780
def dbus_service_property(dbus_interface,
781
signature="v",
782
access="readwrite",
783
byte_arrays=False):
564
def dbus_service_property(dbus_interface, signature="v",
565
access="readwrite", byte_arrays=False):
784
566
"""Decorators for marking methods of a DBusObjectWithProperties to
785
567
become properties on the D-Bus.
786
568
795
577
# "Set" method, so we fail early here:
796
578
if byte_arrays and signature != "ay":
797
579
raise ValueError("Byte arrays not supported for non-'ay'"
798
" signature {!r}".format(signature))
799
580
" signature %r" % signature)
800
581
def decorator(func):
801
582
func._dbus_is_property = True
802
583
func._dbus_interface = dbus_interface
807
588
func._dbus_name = func._dbus_name[:-14]
808
589
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
809
590
return func
810
811
return decorator
812
813
814
def dbus_interface_annotations(dbus_interface):
815
"""Decorator for marking functions returning interface annotations
816
817
Usage:
818
819
@dbus_interface_annotations("org.example.Interface")
820
def _foo(self): # Function name does not matter
821
return {"org.freedesktop.DBus.Deprecated": "true",
822
"org.freedesktop.DBus.Property.EmitsChangedSignal":
823
"false"}
824
"""
825
826
def decorator(func):
827
func._dbus_is_interface = True
828
func._dbus_interface = dbus_interface
829
func._dbus_name = dbus_interface
830
return func
831
832
return decorator
833
834
835
def dbus_annotations(annotations):
836
"""Decorator to annotate D-Bus methods, signals or properties
837
Usage:
838
839
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
840
"org.freedesktop.DBus.Property."
841
"EmitsChangedSignal": "false"})
842
@dbus_service_property("org.example.Interface", signature="b",
843
access="r")
844
def Property_dbus_property(self):
845
return dbus.Boolean(False)
846
"""
847
848
def decorator(func):
849
func._dbus_annotations = annotations
850
return func
851
852
591
return decorator
853
592
854
593
855
594
class DBusPropertyException(dbus.exceptions.DBusException):
856
595
"""A base class for D-Bus property-related exceptions
857
596
"""
858
pass
597
def __unicode__(self):
598
return unicode(str(self))
859
599
860
600
861
601
class DBusPropertyAccessException(DBusPropertyException):
872
612
873
613
class DBusObjectWithProperties(dbus.service.Object):
874
614
"""A D-Bus object with properties.
875
615
876
616
Classes inheriting from this can use the dbus_service_property
877
617
decorator to expose methods as D-Bus properties. It exposes the
878
618
standard Get(), Set(), and GetAll() methods on the D-Bus.
879
619
"""
880
620
881
621
@staticmethod
882
def _is_dbus_thing(thing):
883
"""Returns a function testing if an attribute is a D-Bus thing
884
885
If called like _is_dbus_thing("method") it returns a function
886
suitable for use as predicate to inspect.getmembers().
887
"""
888
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
889
False)
622
def _is_dbus_property(obj):
623
return getattr(obj, "_dbus_is_property", False)
890
624
891
def _get_all_dbus_things(self, thing):
625
def _get_all_dbus_properties(self):
892
626
"""Returns a generator of (name, attribute) pairs
893
627
"""
894
return ((getattr(athing.__get__(self), "_dbus_name", name),
895
athing.__get__(self))
896
for cls in self.__class__.__mro__
897
for name, athing in
898
inspect.getmembers(cls, self._is_dbus_thing(thing)))
628
return ((prop._dbus_name, prop)
629
for name, prop in
630
inspect.getmembers(self, self._is_dbus_property))
899
631
900
632
def _get_dbus_property(self, interface_name, property_name):
901
633
"""Returns a bound method if one exists which is a D-Bus
902
634
property with the specified name and interface.
903
635
"""
904
for cls in self.__class__.__mro__:
905
for name, value in inspect.getmembers(
906
cls, self._is_dbus_thing("property")):
907
if (value._dbus_name == property_name
908
and value._dbus_interface == interface_name):
909
return value.__get__(self)
910
636
for name in (property_name,
637
property_name + "_dbus_property"):
638
prop = getattr(self, name, None)
639
if (prop is None
640
or not self._is_dbus_property(prop)
641
or prop._dbus_name != property_name
642
or (interface_name and prop._dbus_interface
643
and interface_name != prop._dbus_interface)):
644
continue
645
return prop
911
646
# No such property
912
raise DBusPropertyNotFound("{}:{}.{}".format(
913
self.dbus_object_path, interface_name, property_name))
647
raise DBusPropertyNotFound(self.dbus_object_path + ":"
648
+ interface_name + "."
649
+ property_name)
914
650
915
@dbus.service.method(dbus.PROPERTIES_IFACE,
916
in_signature="ss",
651
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
917
652
out_signature="v")
918
653
def Get(self, interface_name, property_name):
919
654
"""Standard D-Bus property Get() method, see D-Bus standard.
937
672
# The byte_arrays option is not supported yet on
938
673
# signatures other than "ay".
939
674
if prop._dbus_signature != "ay":
940
raise ValueError("Byte arrays not supported for non-"
941
"'ay' signature {!r}"
942
.format(prop._dbus_signature))
943
value = dbus.ByteArray(b''.join(chr(byte)
944
for byte in value))
675
raise ValueError
676
value = dbus.ByteArray(''.join(unichr(byte)
677
for byte in value))
945
678
prop(value)
946
679
947
@dbus.service.method(dbus.PROPERTIES_IFACE,
948
in_signature="s",
680
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
949
681
out_signature="a{sv}")
950
682
def GetAll(self, interface_name):
951
683
"""Standard D-Bus property GetAll() method, see D-Bus
952
684
standard.
953
685
954
686
Note: Will not include properties with access="write".
955
687
"""
956
properties = {}
957
for name, prop in self._get_all_dbus_things("property"):
688
all = {}
689
for name, prop in self._get_all_dbus_properties():
958
690
if (interface_name
959
691
and interface_name != prop._dbus_interface):
960
692
# Interface non-empty but did not match
964
696
continue
965
697
value = prop()
966
698
if not hasattr(value, "variant_level"):
967
properties[name] = value
699
all[name] = value
968
700
continue
969
properties[name] = type(value)(
970
value, variant_level = value.variant_level + 1)
971
return dbus.Dictionary(properties, signature="sv")
972
973
@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
974
def PropertiesChanged(self, interface_name, changed_properties,
975
invalidated_properties):
976
"""Standard D-Bus PropertiesChanged() signal, see D-Bus
977
standard.
978
"""
979
pass
701
all[name] = type(value)(value, variant_level=
702
value.variant_level+1)
703
return dbus.Dictionary(all, signature="sv")
980
704
981
705
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
982
706
out_signature="s",
983
707
path_keyword='object_path',
984
708
connection_keyword='connection')
985
709
def Introspect(self, object_path, connection):
986
"""Overloading of standard D-Bus method.
987
988
Inserts property tags and interface annotation tags.
710
"""Standard D-Bus method, overloaded to insert property tags.
989
711
"""
990
712
xmlstring = dbus.service.Object.Introspect(self, object_path,
991
713
connection)
992
714
try:
993
715
document = xml.dom.minidom.parseString(xmlstring)
994
995
716
def make_tag(document, name, prop):
996
717
e = document.createElement("property")
997
718
e.setAttribute("name", name)
998
719
e.setAttribute("type", prop._dbus_signature)
999
720
e.setAttribute("access", prop._dbus_access)
1000
721
return e
1001
1002
722
for if_tag in document.getElementsByTagName("interface"):
1003
# Add property tags
1004
723
for tag in (make_tag(document, name, prop)
1005
724
for name, prop
1006
in self._get_all_dbus_things("property")
725
in self._get_all_dbus_properties()
1007
726
if prop._dbus_interface
1008
727
== if_tag.getAttribute("name")):
1009
728
if_tag.appendChild(tag)
1010
# Add annotation tags
1011
for typ in ("method", "signal", "property"):
1012
for tag in if_tag.getElementsByTagName(typ):
1013
annots = dict()
1014
for name, prop in (self.
1015
_get_all_dbus_things(typ)):
1016
if (name == tag.getAttribute("name")
1017
and prop._dbus_interface
1018
== if_tag.getAttribute("name")):
1019
annots.update(getattr(
1020
prop, "_dbus_annotations", {}))
1021
for name, value in annots.items():
1022
ann_tag = document.createElement(
1023
"annotation")
1024
ann_tag.setAttribute("name", name)
1025
ann_tag.setAttribute("value", value)
1026
tag.appendChild(ann_tag)
1027
# Add interface annotation tags
1028
for annotation, value in dict(
1029
itertools.chain.from_iterable(
1030
annotations().items()
1031
for name, annotations
1032
in self._get_all_dbus_things("interface")
1033
if name == if_tag.getAttribute("name")
1034
)).items():
1035
ann_tag = document.createElement("annotation")
1036
ann_tag.setAttribute("name", annotation)
1037
ann_tag.setAttribute("value", value)
1038
if_tag.appendChild(ann_tag)
1039
729
# Add the names to the return values for the
1040
730
# "org.freedesktop.DBus.Properties" methods
1041
731
if (if_tag.getAttribute("name")
1056
746
except (AttributeError, xml.dom.DOMException,
1057
747
xml.parsers.expat.ExpatError) as error:
1058
748
logger.error("Failed to override Introspection method",
1059
exc_info=error)
749
error)
1060
750
return xmlstring
1061
751
1062
752
1063
def datetime_to_dbus(dt, variant_level=0):
753
def datetime_to_dbus (dt, variant_level=0):
1064
754
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1065
755
if dt is None:
1066
756
return dbus.String("", variant_level = variant_level)
1067
return dbus.String(dt.isoformat(), variant_level=variant_level)
1068
1069
1070
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1071
"""A class decorator; applied to a subclass of
1072
dbus.service.Object, it will add alternate D-Bus attributes with
1073
interface names according to the "alt_interface_names" mapping.
1074
Usage:
1075
1076
@alternate_dbus_interfaces({"org.example.Interface":
1077
"net.example.AlternateInterface"})
1078
class SampleDBusObject(dbus.service.Object):
1079
@dbus.service.method("org.example.Interface")
1080
def SampleDBusMethod():
1081
pass
1082
1083
The above "SampleDBusMethod" on "SampleDBusObject" will be
1084
reachable via two interfaces: "org.example.Interface" and
1085
"net.example.AlternateInterface", the latter of which will have
1086
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1087
"true", unless "deprecate" is passed with a False value.
1088
1089
This works for methods and signals, and also for D-Bus properties
1090
(from DBusObjectWithProperties) and interfaces (from the
1091
dbus_interface_annotations decorator).
1092
"""
1093
1094
def wrapper(cls):
1095
for orig_interface_name, alt_interface_name in (
1096
alt_interface_names.items()):
1097
attr = {}
1098
interface_names = set()
1099
# Go though all attributes of the class
1100
for attrname, attribute in inspect.getmembers(cls):
1101
# Ignore non-D-Bus attributes, and D-Bus attributes
1102
# with the wrong interface name
1103
if (not hasattr(attribute, "_dbus_interface")
1104
or not attribute._dbus_interface.startswith(
1105
orig_interface_name)):
1106
continue
1107
# Create an alternate D-Bus interface name based on
1108
# the current name
1109
alt_interface = attribute._dbus_interface.replace(
1110
orig_interface_name, alt_interface_name)
1111
interface_names.add(alt_interface)
1112
# Is this a D-Bus signal?
1113
if getattr(attribute, "_dbus_is_signal", False):
1114
# Extract the original non-method undecorated
1115
# function by black magic
1116
nonmethod_func = (dict(
1117
zip(attribute.func_code.co_freevars,
1118
attribute.__closure__))
1119
["func"].cell_contents)
1120
# Create a new, but exactly alike, function
1121
# object, and decorate it to be a new D-Bus signal
1122
# with the alternate D-Bus interface name
1123
new_function = (dbus.service.signal(
1124
alt_interface, attribute._dbus_signature)
1125
(types.FunctionType(
1126
nonmethod_func.func_code,
1127
nonmethod_func.func_globals,
1128
nonmethod_func.func_name,
1129
nonmethod_func.func_defaults,
1130
nonmethod_func.func_closure)))
1131
# Copy annotations, if any
1132
try:
1133
new_function._dbus_annotations = dict(
1134
attribute._dbus_annotations)
1135
except AttributeError:
1136
pass
1137
# 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
1141
def fixscope(func1, func2):
1142
"""This function is a scope container to pass
1143
func1 and func2 to the "call_both" function
1144
outside of its arguments"""
1145
1146
def call_both(*args, **kwargs):
1147
"""This function will emit two D-Bus
1148
signals by calling func1 and func2"""
1149
func1(*args, **kwargs)
1150
func2(*args, **kwargs)
1151
1152
return call_both
1153
# Create the "call_both" function and add it to
1154
# the class
1155
attr[attrname] = fixscope(attribute, new_function)
1156
# Is this a D-Bus method?
1157
elif getattr(attribute, "_dbus_is_method", False):
1158
# Create a new, but exactly alike, function
1159
# object. Decorate it to be a new D-Bus method
1160
# with the alternate D-Bus interface name. Add it
1161
# 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
1178
# Is this a D-Bus property?
1179
elif getattr(attribute, "_dbus_is_property", False):
1180
# Create a new, but exactly alike, function
1181
# object, and decorate it to be a new D-Bus
1182
# property with the alternate D-Bus interface
1183
# 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"})
757
return dbus.String(dt.isoformat(),
758
variant_level=variant_level)
759
1241
760
class ClientDBus(Client, DBusObjectWithProperties):
1242
761
"""A Client class using D-Bus
1243
762
1247
766
"""
1248
767
1249
768
runtime_expansions = (Client.runtime_expansions
1250
+ ("dbus_object_path", ))
1251
1252
_interface = "se.recompile.Mandos.Client"
769
+ ("dbus_object_path",))
1253
770
1254
771
# dbus.service.Object doesn't use super(), so we can't either.
1255
772
1256
773
def __init__(self, bus = None, *args, **kwargs):
774
self._approvals_pending = 0
1257
775
self.bus = bus
1258
776
Client.__init__(self, *args, **kwargs)
1259
777
# Only now, when this client is initialized, can it show up on
1260
778
# the D-Bus
1261
client_object_name = str(self.name).translate(
779
client_object_name = unicode(self.name).translate(
1262
780
{ord("."): ord("_"),
1263
781
ord("-"): ord("_")})
1264
self.dbus_object_path = dbus.ObjectPath(
1265
"/clients/" + client_object_name)
782
self.dbus_object_path = (dbus.ObjectPath
783
("/clients/" + client_object_name))
1266
784
DBusObjectWithProperties.__init__(self, self.bus,
1267
785
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):
1274
""" Modify a variable so that it's a property which announces
1275
its changes to DBus.
1276
786
1277
transform_fun: Function that takes a value and a variant_level
1278
and transforms it to a D-Bus type.
1279
dbus_name: D-Bus name of the variable
787
def notifychangeproperty(transform_func,
788
dbus_name, type_func=lambda x: x,
789
variant_level=1):
790
""" Modify a variable so that its a property that announce its
791
changes to DBus.
792
transform_fun: Function that takes a value and transform it to
793
DBus type.
794
dbus_name: DBus name of the variable
1280
795
type_func: Function that transform the value before sending it
1281
to the D-Bus. Default: no transform
1282
variant_level: D-Bus variant level. Default: 1
796
to DBus
797
variant_level: DBus variant level. default: 1
1283
798
"""
1284
attrname = "_{}".format(dbus_name)
1285
799
real_value = [None,]
1286
800
def setter(self, value):
801
old_value = real_value[0]
802
real_value[0] = value
1287
803
if hasattr(self, "dbus_object_path"):
1288
if (not hasattr(self, attrname) or
1289
type_func(getattr(self, attrname, None))
1290
!= 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())
1306
setattr(self, attrname, value)
1307
1308
return property(lambda self: getattr(self, attrname), setter)
1309
804
if type_func(old_value) != type_func(real_value[0]):
805
dbus_value = transform_func(type_func(real_value[0]),
806
variant_level)
807
self.PropertyChanged(dbus.String(dbus_name),
808
dbus_value)
809
810
return property(lambda self: real_value[0], setter)
811
812
1310
813
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1311
814
approvals_pending = notifychangeproperty(dbus.Boolean,
1312
815
"ApprovalPending",
1314
817
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1315
818
last_enabled = notifychangeproperty(datetime_to_dbus,
1316
819
"LastEnabled")
1317
checker = notifychangeproperty(
1318
dbus.Boolean, "CheckerRunning",
1319
type_func = lambda checker: checker is not None)
820
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
821
type_func = lambda checker: checker is not None)
1320
822
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1321
823
"LastCheckedOK")
1322
last_checker_status = notifychangeproperty(dbus.Int16,
1323
"LastCheckerStatus")
1324
last_approval_request = notifychangeproperty(
1325
datetime_to_dbus, "LastApprovalRequest")
824
last_approval_request = notifychangeproperty(datetime_to_dbus,
825
"LastApprovalRequest")
1326
826
approved_by_default = notifychangeproperty(dbus.Boolean,
1327
827
"ApprovedByDefault")
1328
approval_delay = notifychangeproperty(
1329
dbus.UInt64, "ApprovalDelay",
1330
type_func = lambda td: td.total_seconds() * 1000)
1331
approval_duration = notifychangeproperty(
1332
dbus.UInt64, "ApprovalDuration",
1333
type_func = lambda td: td.total_seconds() * 1000)
828
approval_delay = notifychangeproperty(dbus.UInt16, "ApprovalDelay",
829
type_func = _timedelta_to_milliseconds)
830
approval_duration = notifychangeproperty(dbus.UInt16, "ApprovalDuration",
831
type_func = _timedelta_to_milliseconds)
1334
832
host = notifychangeproperty(dbus.String, "Host")
1335
timeout = notifychangeproperty(
1336
dbus.UInt64, "Timeout",
1337
type_func = lambda td: td.total_seconds() * 1000)
1338
extended_timeout = notifychangeproperty(
1339
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)
833
timeout = notifychangeproperty(dbus.UInt16, "Timeout",
834
type_func = _timedelta_to_milliseconds)
835
extended_timeout = notifychangeproperty(dbus.UInt16, "ExtendedTimeout",
836
type_func = _timedelta_to_milliseconds)
837
interval = notifychangeproperty(dbus.UInt16, "Interval",
838
type_func = _timedelta_to_milliseconds)
1344
839
checker_command = notifychangeproperty(dbus.String, "Checker")
1345
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1346
invalidate_only=True)
1347
840
1348
841
del notifychangeproperty
1349
842
1374
867
1375
868
return Client.checker_callback(self, pid, condition, command,
1376
869
*args, **kwargs)
1377
870
1378
871
def start_checker(self, *args, **kwargs):
1379
old_checker_pid = getattr(self.checker, "pid", None)
872
old_checker = self.checker
873
if self.checker is not None:
874
old_checker_pid = self.checker.pid
875
else:
876
old_checker_pid = None
1380
877
r = Client.start_checker(self, *args, **kwargs)
1381
878
# Only if new checker process was started
1382
879
if (self.checker is not None
1386
883
return r
1387
884
1388
885
def _reset_approved(self):
1389
self.approved = None
886
self._approved = None
1390
887
return False
1391
888
1392
889
def approve(self, value=True):
1393
self.approved = value
1394
gobject.timeout_add(int(self.approval_duration.total_seconds()
1395
* 1000), self._reset_approved)
1396
890
self.send_changedstate()
891
self._approved = value
892
gobject.timeout_add(_timedelta_to_milliseconds
893
(self.approval_duration),
894
self._reset_approved)
895
1397
896
1398
897
## D-Bus methods, signals & properties
1399
1400
## Interfaces
898
_interface = "se.bsnet.fukt.Mandos.Client"
1401
899
1402
900
## Signals
1403
901
1414
912
pass
1415
913
1416
914
# PropertyChanged - signal
1417
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1418
915
@dbus.service.signal(_interface, signature="sv")
1419
916
def PropertyChanged(self, property, value):
1420
917
"D-Bus signal"
1484
981
return dbus.Boolean(bool(self.approvals_pending))
1485
982
1486
983
# ApprovedByDefault - property
1487
@dbus_service_property(_interface,
1488
signature="b",
984
@dbus_service_property(_interface, signature="b",
1489
985
access="readwrite")
1490
986
def ApprovedByDefault_dbus_property(self, value=None):
1491
987
if value is None: # get
1493
989
self.approved_by_default = bool(value)
1494
990
1495
991
# ApprovalDelay - property
1496
@dbus_service_property(_interface,
1497
signature="t",
992
@dbus_service_property(_interface, signature="t",
1498
993
access="readwrite")
1499
994
def ApprovalDelay_dbus_property(self, value=None):
1500
995
if value is None: # get
1501
return dbus.UInt64(self.approval_delay.total_seconds()
1502
* 1000)
996
return dbus.UInt64(self.approval_delay_milliseconds())
1503
997
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1504
998
1505
999
# ApprovalDuration - property
1506
@dbus_service_property(_interface,
1507
signature="t",
1000
@dbus_service_property(_interface, signature="t",
1508
1001
access="readwrite")
1509
1002
def ApprovalDuration_dbus_property(self, value=None):
1510
1003
if value is None: # get
1511
return dbus.UInt64(self.approval_duration.total_seconds()
1512
* 1000)
1004
return dbus.UInt64(_timedelta_to_milliseconds(
1005
self.approval_duration))
1513
1006
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1514
1007
1515
1008
# Name - property
1523
1016
return dbus.String(self.fingerprint)
1524
1017
1525
1018
# Host - property
1526
@dbus_service_property(_interface,
1527
signature="s",
1019
@dbus_service_property(_interface, signature="s",
1528
1020
access="readwrite")
1529
1021
def Host_dbus_property(self, value=None):
1530
1022
if value is None: # get
1531
1023
return dbus.String(self.host)
1532
self.host = str(value)
1024
self.host = value
1533
1025
1534
1026
# Created - property
1535
1027
@dbus_service_property(_interface, signature="s", access="read")
1536
1028
def Created_dbus_property(self):
1537
return datetime_to_dbus(self.created)
1029
return dbus.String(datetime_to_dbus(self.created))
1538
1030
1539
1031
# LastEnabled - property
1540
1032
@dbus_service_property(_interface, signature="s", access="read")
1542
1034
return datetime_to_dbus(self.last_enabled)
1543
1035
1544
1036
# Enabled - property
1545
@dbus_service_property(_interface,
1546
signature="b",
1037
@dbus_service_property(_interface, signature="b",
1547
1038
access="readwrite")
1548
1039
def Enabled_dbus_property(self, value=None):
1549
1040
if value is None: # get
1554
1045
self.disable()
1555
1046
1556
1047
# LastCheckedOK - property
1557
@dbus_service_property(_interface,
1558
signature="s",
1048
@dbus_service_property(_interface, signature="s",
1559
1049
access="readwrite")
1560
1050
def LastCheckedOK_dbus_property(self, value=None):
1561
1051
if value is not None:
1563
1053
return
1564
1054
return datetime_to_dbus(self.last_checked_ok)
1565
1055
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
1056
# Expires - property
1572
1057
@dbus_service_property(_interface, signature="s", access="read")
1573
1058
def Expires_dbus_property(self):
1579
1064
return datetime_to_dbus(self.last_approval_request)
1580
1065
1581
1066
# Timeout - property
1582
@dbus_service_property(_interface,
1583
signature="t",
1067
@dbus_service_property(_interface, signature="t",
1584
1068
access="readwrite")
1585
1069
def Timeout_dbus_property(self, value=None):
1586
1070
if value is None: # get
1587
return dbus.UInt64(self.timeout.total_seconds() * 1000)
1588
old_timeout = self.timeout
1071
return dbus.UInt64(self.timeout_milliseconds())
1589
1072
self.timeout = datetime.timedelta(0, 0, 0, value)
1590
# Reschedule disabling
1591
if self.enabled:
1592
now = datetime.datetime.utcnow()
1593
self.expires += self.timeout - old_timeout
1594
if self.expires <= now:
1595
# The timeout has passed
1596
self.disable()
1597
else:
1598
if (getattr(self, "disable_initiator_tag", None)
1599
is None):
1600
return
1601
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)
1605
1073
if getattr(self, "disable_initiator_tag", None) is None:
1074
return
1075
# Reschedule timeout
1076
gobject.source_remove(self.disable_initiator_tag)
1077
self.disable_initiator_tag = None
1078
self.expires = None
1079
time_to_die = (self.
1080
_timedelta_to_milliseconds((self
1081
.last_checked_ok
1082
+ self.timeout)
1083
- datetime.datetime
1084
.utcnow()))
1085
if time_to_die <= 0:
1086
# The timeout has passed
1087
self.disable()
1088
else:
1089
self.expires = (datetime.datetime.utcnow()
1090
+ datetime.timedelta(milliseconds = time_to_die))
1091
self.disable_initiator_tag = (gobject.timeout_add
1092
(time_to_die, self.disable))
1093
1606
1094
# ExtendedTimeout - property
1607
@dbus_service_property(_interface,
1608
signature="t",
1095
@dbus_service_property(_interface, signature="t",
1609
1096
access="readwrite")
1610
1097
def ExtendedTimeout_dbus_property(self, value=None):
1611
1098
if value is None: # get
1612
return dbus.UInt64(self.extended_timeout.total_seconds()
1613
* 1000)
1099
return dbus.UInt64(self.extended_timeout_milliseconds())
1614
1100
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1615
1101
1616
1102
# Interval - property
1617
@dbus_service_property(_interface,
1618
signature="t",
1103
@dbus_service_property(_interface, signature="t",
1619
1104
access="readwrite")
1620
1105
def Interval_dbus_property(self, value=None):
1621
1106
if value is None: # get
1622
return dbus.UInt64(self.interval.total_seconds() * 1000)
1107
return dbus.UInt64(self.interval_milliseconds())
1623
1108
self.interval = datetime.timedelta(0, 0, 0, value)
1624
1109
if getattr(self, "checker_initiator_tag", None) is None:
1625
1110
return
1626
if self.enabled:
1627
# Reschedule checker run
1628
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
1632
1111
# Reschedule checker run
1112
gobject.source_remove(self.checker_initiator_tag)
1113
self.checker_initiator_tag = (gobject.timeout_add
1114
(value, self.start_checker))
1115
self.start_checker() # Start one now, too
1116
1633
1117
# Checker - property
1634
@dbus_service_property(_interface,
1635
signature="s",
1118
@dbus_service_property(_interface, signature="s",
1636
1119
access="readwrite")
1637
1120
def Checker_dbus_property(self, value=None):
1638
1121
if value is None: # get
1639
1122
return dbus.String(self.checker_command)
1640
self.checker_command = str(value)
1123
self.checker_command = value
1641
1124
1642
1125
# CheckerRunning - property
1643
@dbus_service_property(_interface,
1644
signature="b",
1126
@dbus_service_property(_interface, signature="b",
1645
1127
access="readwrite")
1646
1128
def CheckerRunning_dbus_property(self, value=None):
1647
1129
if value is None: # get
1657
1139
return self.dbus_object_path # is already a dbus.ObjectPath
1658
1140
1659
1141
# Secret = property
1660
@dbus_service_property(_interface,
1661
signature="ay",
1662
access="write",
1663
byte_arrays=True)
1142
@dbus_service_property(_interface, signature="ay",
1143
access="write", byte_arrays=True)
1664
1144
def Secret_dbus_property(self, value):
1665
self.secret = bytes(value)
1145
self.secret = str(value)
1666
1146
1667
1147
del _interface
1668
1148
1672
1152
self._pipe = child_pipe
1673
1153
self._pipe.send(('init', fpr, address))
1674
1154
if not self._pipe.recv():
1675
raise KeyError(fpr)
1676
1155
raise KeyError()
1156
1677
1157
def __getattribute__(self, name):
1678
if name == '_pipe':
1158
if(name == '_pipe'):
1679
1159
return super(ProxyClient, self).__getattribute__(name)
1680
1160
self._pipe.send(('getattr', name))
1681
1161
data = self._pipe.recv()
1682
1162
if data[0] == 'data':
1683
1163
return data[1]
1684
1164
if data[0] == 'function':
1685
1686
1165
def func(*args, **kwargs):
1687
1166
self._pipe.send(('funcall', name, args, kwargs))
1688
1167
return self._pipe.recv()[1]
1689
1690
1168
return func
1691
1169
1692
1170
def __setattr__(self, name, value):
1693
if name == '_pipe':
1171
if(name == '_pipe'):
1694
1172
return super(ProxyClient, self).__setattr__(name, value)
1695
1173
self._pipe.send(('setattr', name, value))
1696
1174
1704
1182
def handle(self):
1705
1183
with contextlib.closing(self.server.child_pipe) as child_pipe:
1706
1184
logger.info("TCP connection from: %s",
1707
str(self.client_address))
1185
unicode(self.client_address))
1708
1186
logger.debug("Pipe FD: %d",
1709
1187
self.server.child_pipe.fileno())
1710
1711
session = gnutls.connection.ClientSession(
1712
self.request, gnutls.connection .X509Credentials())
1713
1188
1189
session = (gnutls.connection
1190
.ClientSession(self.request,
1191
gnutls.connection
1192
.X509Credentials()))
1193
1714
1194
# Note: gnutls.connection.X509Credentials is really a
1715
1195
# generic GnuTLS certificate credentials object so long as
1716
1196
# no X.509 keys are added to it. Therefore, we can use it
1717
1197
# here despite using OpenPGP certificates.
1718
1198
1719
1199
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1720
1200
# "+AES-256-CBC", "+SHA1",
1721
1201
# "+COMP-NULL", "+CTYPE-OPENPGP",
1724
1204
priority = self.server.gnutls_priority
1725
1205
if priority is None:
1726
1206
priority = "NORMAL"
1727
gnutls.library.functions.gnutls_priority_set_direct(
1728
session._c_object, priority, None)
1729
1207
(gnutls.library.functions
1208
.gnutls_priority_set_direct(session._c_object,
1209
priority, None))
1210
1730
1211
# Start communication using the Mandos protocol
1731
1212
# Get protocol number
1732
1213
line = self.request.makefile().readline()
1733
1214
logger.debug("Protocol version: %r", line)
1734
1215
try:
1735
1216
if int(line.strip().split()[0]) > 1:
1736
raise RuntimeError(line)
1217
raise RuntimeError
1737
1218
except (ValueError, IndexError, RuntimeError) as error:
1738
1219
logger.error("Unknown protocol version: %s", error)
1739
1220
return
1740
1221
1741
1222
# Start GnuTLS connection
1742
1223
try:
1743
1224
session.handshake()
1747
1228
# established. Just abandon the request.
1748
1229
return
1749
1230
logger.debug("Handshake succeeded")
1750
1231
1751
1232
approval_required = False
1752
1233
try:
1753
1234
try:
1754
fpr = self.fingerprint(
1755
self.peer_certificate(session))
1235
fpr = self.fingerprint(self.peer_certificate
1236
(session))
1756
1237
except (TypeError,
1757
1238
gnutls.errors.GNUTLSError) as error:
1758
1239
logger.warning("Bad certificate: %s", error)
1759
1240
return
1760
1241
logger.debug("Fingerprint: %s", fpr)
1761
1242
1762
1243
try:
1763
1244
client = ProxyClient(child_pipe, fpr,
1764
1245
self.client_address)
1773
1254
while True:
1774
1255
if not client.enabled:
1775
1256
logger.info("Client %s is disabled",
1776
client.name)
1257
client.name)
1777
1258
if self.server.use_dbus:
1778
1259
# Emit D-Bus signal
1779
client.Rejected("Disabled")
1260
client.Rejected("Disabled")
1780
1261
return
1781
1262
1782
if client.approved or not client.approval_delay:
1263
if client._approved or not client.approval_delay:
1783
1264
#We are approved or approval is disabled
1784
1265
break
1785
elif client.approved is None:
1266
elif client._approved is None:
1786
1267
logger.info("Client %s needs approval",
1787
1268
client.name)
1788
1269
if self.server.use_dbus:
1789
1270
# Emit D-Bus signal
1790
1271
client.NeedApproval(
1791
client.approval_delay.total_seconds()
1792
* 1000, client.approved_by_default)
1272
client.approval_delay_milliseconds(),
1273
client.approved_by_default)
1793
1274
else:
1794
1275
logger.warning("Client %s was not approved",
1795
1276
client.name)
1799
1280
return
1800
1281
1801
1282
#wait until timeout or approved
1283
#x = float(client._timedelta_to_milliseconds(delay))
1802
1284
time = datetime.datetime.now()
1803
1285
client.changedstate.acquire()
1804
client.changedstate.wait(delay.total_seconds())
1286
client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))
1805
1287
client.changedstate.release()
1806
1288
time2 = datetime.datetime.now()
1807
1289
if (time2 - time) >= delay:
1823
1305
try:
1824
1306
sent = session.send(client.secret[sent_size:])
1825
1307
except gnutls.errors.GNUTLSError as error:
1826
logger.warning("gnutls send failed",
1827
exc_info=error)
1308
logger.warning("gnutls send failed")
1828
1309
return
1829
logger.debug("Sent: %d, remaining: %d", sent,
1830
len(client.secret) - (sent_size
1831
+ sent))
1310
logger.debug("Sent: %d, remaining: %d",
1311
sent, len(client.secret)
1312
- (sent_size + sent))
1832
1313
sent_size += sent
1833
1314
1834
1315
logger.info("Sending secret to %s", client.name)
1835
# bump the timeout using extended_timeout
1836
client.bump_timeout(client.extended_timeout)
1316
# bump the timeout as if seen
1317
client.checked_ok(client.extended_timeout)
1837
1318
if self.server.use_dbus:
1838
1319
# Emit D-Bus signal
1839
1320
client.GotSecret()
1844
1325
try:
1845
1326
session.bye()
1846
1327
except gnutls.errors.GNUTLSError as error:
1847
logger.warning("GnuTLS bye failed",
1848
exc_info=error)
1328
logger.warning("GnuTLS bye failed")
1849
1329
1850
1330
@staticmethod
1851
1331
def peer_certificate(session):
1852
1332
"Return the peer's OpenPGP certificate as a bytestring"
1853
1333
# If not an OpenPGP certificate...
1854
if (gnutls.library.functions.gnutls_certificate_type_get(
1855
session._c_object)
1334
if (gnutls.library.functions
1335
.gnutls_certificate_type_get(session._c_object)
1856
1336
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1857
1337
# ...do the normal thing
1858
1338
return session.peer_certificate
1872
1352
def fingerprint(openpgp):
1873
1353
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1874
1354
# 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)))
1355
datum = (gnutls.library.types
1356
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1357
ctypes.POINTER
1358
(ctypes.c_ubyte)),
1359
ctypes.c_uint(len(openpgp))))
1879
1360
# New empty GnuTLS certificate
1880
1361
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1881
gnutls.library.functions.gnutls_openpgp_crt_init(
1882
ctypes.byref(crt))
1362
(gnutls.library.functions
1363
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1883
1364
# 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)
1365
(gnutls.library.functions
1366
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1367
gnutls.library.constants
1368
.GNUTLS_OPENPGP_FMT_RAW))
1887
1369
# Verify the self signature in the key
1888
1370
crtverify = ctypes.c_uint()
1889
gnutls.library.functions.gnutls_openpgp_crt_verify_self(
1890
crt, 0, ctypes.byref(crtverify))
1371
(gnutls.library.functions
1372
.gnutls_openpgp_crt_verify_self(crt, 0,
1373
ctypes.byref(crtverify)))
1891
1374
if crtverify.value != 0:
1892
1375
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1893
raise gnutls.errors.CertificateSecurityError(
1894
"Verify failed")
1376
raise (gnutls.errors.CertificateSecurityError
1377
("Verify failed"))
1895
1378
# New buffer for the fingerprint
1896
1379
buf = ctypes.create_string_buffer(20)
1897
1380
buf_len = ctypes.c_size_t()
1898
1381
# 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))
1382
(gnutls.library.functions
1383
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1384
ctypes.byref(buf_len)))
1901
1385
# Deinit the certificate
1902
1386
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1903
1387
# Convert the buffer to a Python bytestring
1904
1388
fpr = ctypes.string_at(buf, buf_len.value)
1905
1389
# Convert the bytestring to hexadecimal notation
1906
hex_fpr = binascii.hexlify(fpr).upper()
1390
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
1907
1391
return hex_fpr
1908
1392
1909
1393
1910
1394
class MultiprocessingMixIn(object):
1911
1395
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1912
1913
1396
def sub_process_main(self, request, address):
1914
1397
try:
1915
1398
self.finish_request(request, address)
1916
except Exception:
1399
except:
1917
1400
self.handle_error(request, address)
1918
1401
self.close_request(request)
1919
1402
1920
1403
def process_request(self, request, address):
1921
1404
"""Start a new process to process the request."""
1922
proc = multiprocessing.Process(target = self.sub_process_main,
1923
args = (request, address))
1924
proc.start()
1925
return proc
1926
1405
multiprocessing.Process(target = self.sub_process_main,
1406
args = (request, address)).start()
1927
1407
1928
1408
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1929
1409
""" adds a pipe to the MixIn """
1930
1931
1410
def process_request(self, request, client_address):
1932
1411
"""Overrides and wraps the original process_request().
1933
1412
1934
1413
This function creates a new pipe in self.pipe
1935
1414
"""
1936
1415
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1937
1938
proc = MultiprocessingMixIn.process_request(self, request,
1939
client_address)
1416
1417
super(MultiprocessingMixInWithPipe,
1418
self).process_request(request, client_address)
1940
1419
self.child_pipe.close()
1941
self.add_pipe(parent_pipe, proc)
1942
1943
def add_pipe(self, parent_pipe, proc):
1420
self.add_pipe(parent_pipe)
1421
1422
def add_pipe(self, parent_pipe):
1944
1423
"""Dummy function; override as necessary"""
1945
raise NotImplementedError()
1946
1424
raise NotImplementedError
1947
1425
1948
1426
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1949
1427
socketserver.TCPServer, object):
1954
1432
interface: None or a network interface name (string)
1955
1433
use_ipv6: Boolean; to use IPv6 or not
1956
1434
"""
1957
1958
1435
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
"""
1436
interface=None, use_ipv6=True):
1965
1437
self.interface = interface
1966
1438
if use_ipv6:
1967
1439
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
1440
socketserver.TCPServer.__init__(self, server_address,
1995
1441
RequestHandlerClass)
1996
1997
1442
def server_bind(self):
1998
1443
"""This overrides the normal server_bind() function
1999
1444
to bind to an interface if one was specified, and also NOT to
2005
1450
self.interface)
2006
1451
else:
2007
1452
try:
2008
self.socket.setsockopt(
2009
socket.SOL_SOCKET, SO_BINDTODEVICE,
2010
(self.interface + "\0").encode("utf-8"))
1453
self.socket.setsockopt(socket.SOL_SOCKET,
1454
SO_BINDTODEVICE,
1455
str(self.interface
1456
+ '\0'))
2011
1457
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:
1458
if error[0] == errno.EPERM:
1459
logger.error("No permission to"
1460
" bind to interface %s",
1461
self.interface)
1462
elif error[0] == errno.ENOPROTOOPT:
2016
1463
logger.error("SO_BINDTODEVICE not available;"
2017
1464
" cannot bind to interface %s",
2018
1465
self.interface)
2019
elif error.errno == errno.ENODEV:
2020
logger.error("Interface %s does not exist,"
2021
" cannot bind", self.interface)
2022
1466
else:
2023
1467
raise
2024
1468
# Only bind(2) the socket if we really need to.
2027
1471
if self.address_family == socket.AF_INET6:
2028
1472
any_address = "::" # in6addr_any
2029
1473
else:
2030
any_address = "0.0.0.0" # INADDR_ANY
1474
any_address = socket.INADDR_ANY
2031
1475
self.server_address = (any_address,
2032
1476
self.server_address[1])
2033
1477
elif not self.server_address[1]:
2034
self.server_address = (self.server_address[0], 0)
1478
self.server_address = (self.server_address[0],
1479
0)
2035
1480
# if self.interface:
2036
1481
# self.server_address = (self.server_address[0],
2037
1482
# 0, # port
2051
1496
2052
1497
Assumes a gobject.MainLoop event loop.
2053
1498
"""
2054
2055
1499
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):
1500
interface=None, use_ipv6=True, clients=None,
1501
gnutls_priority=None, use_dbus=True):
2062
1502
self.enabled = False
2063
1503
self.clients = clients
2064
1504
if self.clients is None:
2065
self.clients = {}
1505
self.clients = set()
2066
1506
self.use_dbus = use_dbus
2067
1507
self.gnutls_priority = gnutls_priority
2068
1508
IPv6_TCPServer.__init__(self, server_address,
2069
1509
RequestHandlerClass,
2070
1510
interface = interface,
2071
use_ipv6 = use_ipv6,
2072
socketfd = socketfd)
2073
1511
use_ipv6 = use_ipv6)
2074
1512
def server_activate(self):
2075
1513
if self.enabled:
2076
1514
return socketserver.TCPServer.server_activate(self)
2077
2078
1515
def enable(self):
2079
1516
self.enabled = True
2080
2081
def add_pipe(self, parent_pipe, proc):
1517
def add_pipe(self, parent_pipe):
2082
1518
# 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))
2089
2090
def handle_ipc(self, source, condition,
2091
parent_pipe=None,
2092
proc = None,
1519
gobject.io_add_watch(parent_pipe.fileno(),
1520
gobject.IO_IN | gobject.IO_HUP,
1521
functools.partial(self.handle_ipc,
1522
parent_pipe = parent_pipe))
1523
1524
def handle_ipc(self, source, condition, parent_pipe=None,
2093
1525
client_object=None):
2094
# error, or the other end of multiprocessing.Pipe has closed
2095
if condition & (gobject.IO_ERR | gobject.IO_HUP):
2096
# Wait for other process to exit
2097
proc.join()
1526
condition_names = {
1527
gobject.IO_IN: "IN", # There is data to read.
1528
gobject.IO_OUT: "OUT", # Data can be written (without
1529
# blocking).
1530
gobject.IO_PRI: "PRI", # There is urgent data to read.
1531
gobject.IO_ERR: "ERR", # Error condition.
1532
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1533
# broken, usually for pipes and
1534
# sockets).
1535
}
1536
conditions_string = ' | '.join(name
1537
for cond, name in
1538
condition_names.iteritems()
1539
if cond & condition)
1540
# error or the other end of multiprocessing.Pipe has closed
1541
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
2098
1542
return False
2099
1543
2100
1544
# Read a request from the child
2105
1549
fpr = request[1]
2106
1550
address = request[2]
2107
1551
2108
for c in self.clients.itervalues():
1552
for c in self.clients:
2109
1553
if c.fingerprint == fpr:
2110
1554
client = c
2111
1555
break
2114
1558
"dress: %s", fpr, address)
2115
1559
if self.use_dbus:
2116
1560
# Emit D-Bus signal
2117
mandos_dbus_service.ClientNotFound(fpr,
2118
address[0])
1561
mandos_dbus_service.ClientNotFound(fpr, address[0])
2119
1562
parent_pipe.send(False)
2120
1563
return False
2121
1564
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))
1565
gobject.io_add_watch(parent_pipe.fileno(),
1566
gobject.IO_IN | gobject.IO_HUP,
1567
functools.partial(self.handle_ipc,
1568
parent_pipe = parent_pipe,
1569
client_object = client))
2129
1570
parent_pipe.send(True)
2130
# remove the old hook in favor of the new above hook on
2131
# same fileno
1571
# remove the old hook in favor of the new above hook on same fileno
2132
1572
return False
2133
1573
if command == 'funcall':
2134
1574
funcname = request[1]
2135
1575
args = request[2]
2136
1576
kwargs = request[3]
2137
1577
2138
parent_pipe.send(('data', getattr(client_object,
2139
funcname)(*args,
2140
**kwargs)))
2141
1578
parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))
1579
2142
1580
if command == 'getattr':
2143
1581
attrname = request[1]
2144
1582
if callable(client_object.__getattribute__(attrname)):
2145
parent_pipe.send(('function', ))
1583
parent_pipe.send(('function',))
2146
1584
else:
2147
parent_pipe.send((
2148
'data', client_object.__getattribute__(attrname)))
1585
parent_pipe.send(('data', client_object.__getattribute__(attrname)))
2149
1586
2150
1587
if command == 'setattr':
2151
1588
attrname = request[1]
2152
1589
value = request[2]
2153
1590
setattr(client_object, attrname, value)
2154
1591
2155
1592
return True
2156
1593
2157
1594
2158
def rfc3339_duration_to_delta(duration):
2159
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2160
2161
>>> rfc3339_duration_to_delta("P7D")
2162
datetime.timedelta(7)
2163
>>> rfc3339_duration_to_delta("PT60S")
2164
datetime.timedelta(0, 60)
2165
>>> rfc3339_duration_to_delta("PT60M")
2166
datetime.timedelta(0, 3600)
2167
>>> rfc3339_duration_to_delta("PT24H")
2168
datetime.timedelta(1)
2169
>>> rfc3339_duration_to_delta("P1W")
2170
datetime.timedelta(7)
2171
>>> rfc3339_duration_to_delta("PT5M30S")
2172
datetime.timedelta(0, 330)
2173
>>> rfc3339_duration_to_delta("P1DT3M20S")
2174
datetime.timedelta(1, 200)
2175
"""
2176
2177
# Parsing an RFC 3339 duration with regular expressions is not
2178
# possible - there would have to be multiple places for the same
2179
# values, like seconds. The current code, while more esoteric, is
2180
# cleaner without depending on a parsing library. If Python had a
2181
# built-in library for parsing we would use it, but we'd like to
2182
# avoid excessive use of external libraries.
2183
2184
# New type for defining tokens, syntax, and semantics all-in-one
2185
Token = collections.namedtuple("Token", (
2186
"regexp", # To match token; if "value" is not None, must have
2187
# a "group" containing digits
2188
"value", # datetime.timedelta or None
2189
"followers")) # Tokens valid after this token
2190
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2191
# the "duration" ABNF definition in RFC 3339, Appendix A.
2192
token_end = Token(re.compile(r"$"), None, frozenset())
2193
token_second = Token(re.compile(r"(\d+)S"),
2194
datetime.timedelta(seconds=1),
2195
frozenset((token_end, )))
2196
token_minute = Token(re.compile(r"(\d+)M"),
2197
datetime.timedelta(minutes=1),
2198
frozenset((token_second, token_end)))
2199
token_hour = Token(re.compile(r"(\d+)H"),
2200
datetime.timedelta(hours=1),
2201
frozenset((token_minute, token_end)))
2202
token_time = Token(re.compile(r"T"),
2203
None,
2204
frozenset((token_hour, token_minute,
2205
token_second)))
2206
token_day = Token(re.compile(r"(\d+)D"),
2207
datetime.timedelta(days=1),
2208
frozenset((token_time, token_end)))
2209
token_month = Token(re.compile(r"(\d+)M"),
2210
datetime.timedelta(weeks=4),
2211
frozenset((token_day, token_end)))
2212
token_year = Token(re.compile(r"(\d+)Y"),
2213
datetime.timedelta(weeks=52),
2214
frozenset((token_month, token_end)))
2215
token_week = Token(re.compile(r"(\d+)W"),
2216
datetime.timedelta(weeks=1),
2217
frozenset((token_end, )))
2218
token_duration = Token(re.compile(r"P"), None,
2219
frozenset((token_year, token_month,
2220
token_day, token_time,
2221
token_week)))
2222
# Define starting values
2223
value = datetime.timedelta() # Value so far
2224
found_token = None
2225
followers = frozenset((token_duration, )) # Following valid tokens
2226
s = duration # String left to parse
2227
# Loop until end token is found
2228
while found_token is not token_end:
2229
# Search for any currently valid tokens
2230
for token in followers:
2231
match = token.regexp.match(s)
2232
if match is not None:
2233
# Token found
2234
if token.value is not None:
2235
# Value found, parse digits
2236
factor = int(match.group(1), 10)
2237
# Add to value so far
2238
value += factor * token.value
2239
# Strip token from string
2240
s = token.regexp.sub("", s, 1)
2241
# Go to found token
2242
found_token = token
2243
# Set valid next tokens
2244
followers = found_token.followers
2245
break
2246
else:
2247
# No currently valid tokens were found
2248
raise ValueError("Invalid RFC 3339 duration: {!r}"
2249
.format(duration))
2250
# End token found
2251
return value
2252
2253
2254
1595
def string_to_delta(interval):
2255
1596
"""Parse a string and return a datetime.timedelta
2256
1597
2267
1608
>>> string_to_delta('5m 30s')
2268
1609
datetime.timedelta(0, 330)
2269
1610
"""
2270
2271
try:
2272
return rfc3339_duration_to_delta(interval)
2273
except ValueError:
2274
pass
2275
2276
1611
timevalue = datetime.timedelta(0)
2277
1612
for s in interval.split():
2278
1613
try:
2279
suffix = s[-1]
1614
suffix = unicode(s[-1])
2280
1615
value = int(s[:-1])
2281
1616
if suffix == "d":
2282
1617
delta = datetime.timedelta(value)
2289
1624
elif suffix == "w":
2290
1625
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
2291
1626
else:
2292
raise ValueError("Unknown suffix {!r}".format(suffix))
2293
except IndexError as e:
1627
raise ValueError("Unknown suffix %r" % suffix)
1628
except (ValueError, IndexError) as e:
2294
1629
raise ValueError(*(e.args))
2295
1630
timevalue += delta
2296
1631
return timevalue
2297
1632
2298
1633
1634
def if_nametoindex(interface):
1635
"""Call the C function if_nametoindex(), or equivalent
1636
1637
Note: This function cannot accept a unicode string."""
1638
global if_nametoindex
1639
try:
1640
if_nametoindex = (ctypes.cdll.LoadLibrary
1641
(ctypes.util.find_library("c"))
1642
.if_nametoindex)
1643
except (OSError, AttributeError):
1644
logger.warning("Doing if_nametoindex the hard way")
1645
def if_nametoindex(interface):
1646
"Get an interface index the hard way, i.e. using fcntl()"
1647
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1648
with contextlib.closing(socket.socket()) as s:
1649
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1650
struct.pack(str("16s16x"),
1651
interface))
1652
interface_index = struct.unpack(str("I"),
1653
ifreq[16:20])[0]
1654
return interface_index
1655
return if_nametoindex(interface)
1656
1657
2299
1658
def daemon(nochdir = False, noclose = False):
2300
1659
"""See daemon(3). Standard BSD Unix function.
2301
1660
2309
1668
sys.exit()
2310
1669
if not noclose:
2311
1670
# Close all standard open file descriptors
2312
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1671
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2313
1672
if not stat.S_ISCHR(os.fstat(null).st_mode):
2314
1673
raise OSError(errno.ENODEV,
2315
"{} not a character device"
2316
.format(os.devnull))
1674
"%s not a character device"
1675
% os.path.devnull)
2317
1676
os.dup2(null, sys.stdin.fileno())
2318
1677
os.dup2(null, sys.stdout.fileno())
2319
1678
os.dup2(null, sys.stderr.fileno())
2328
1687
2329
1688
parser = argparse.ArgumentParser()
2330
1689
parser.add_argument("-v", "--version", action="version",
2331
version = "%(prog)s {}".format(version),
1690
version = "%%(prog)s %s" % version,
2332
1691
help="show version number and exit")
2333
1692
parser.add_argument("-i", "--interface", metavar="IF",
2334
1693
help="Bind to interface IF")
2340
1699
help="Run self-test")
2341
1700
parser.add_argument("--debug", action="store_true",
2342
1701
help="Debug mode; run in foreground and log"
2343
" to terminal", default=None)
1702
" to terminal")
2344
1703
parser.add_argument("--debuglevel", metavar="LEVEL",
2345
1704
help="Debug level for stdout output")
2346
1705
parser.add_argument("--priority", help="GnuTLS"
2353
1712
" files")
2354
1713
parser.add_argument("--no-dbus", action="store_false",
2355
1714
dest="use_dbus", help="Do not provide D-Bus"
2356
" system bus interface", default=None)
1715
" system bus interface")
2357
1716
parser.add_argument("--no-ipv6", action="store_false",
2358
dest="use_ipv6", help="Do not use IPv6",
2359
default=None)
2360
parser.add_argument("--no-restore", action="store_false",
2361
dest="restore", help="Do not restore stored"
2362
" state", default=None)
2363
parser.add_argument("--socket", type=int,
2364
help="Specify a file descriptor to a network"
2365
" socket to use instead of creating one")
2366
parser.add_argument("--statedir", metavar="DIR",
2367
help="Directory to save/restore state in")
2368
parser.add_argument("--foreground", action="store_true",
2369
help="Run in foreground", default=None)
2370
parser.add_argument("--no-zeroconf", action="store_false",
2371
dest="zeroconf", help="Do not use Zeroconf",
2372
default=None)
2373
1717
dest="use_ipv6", help="Do not use IPv6")
2374
1718
options = parser.parse_args()
2375
1719
2376
1720
if options.check:
2377
1721
import doctest
2378
fail_count, test_count = doctest.testmod()
2379
sys.exit(os.EX_OK if fail_count == 0 else 1)
1722
doctest.testmod()
1723
sys.exit()
2380
1724
2381
1725
# Default values for config file for server-global settings
2382
1726
server_defaults = { "interface": "",
2384
1728
"port": "",
2385
1729
"debug": "False",
2386
1730
"priority":
2387
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2388
":+SIGN-RSA-SHA224:+SIGN-RSA-RMD160",
1731
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2389
1732
"servicename": "Mandos",
2390
1733
"use_dbus": "True",
2391
1734
"use_ipv6": "True",
2392
1735
"debuglevel": "",
2393
"restore": "True",
2394
"socket": "",
2395
"statedir": "/var/lib/mandos",
2396
"foreground": "False",
2397
"zeroconf": "True",
2398
}
1736
}
2399
1737
2400
1738
# Parse config file for server-global settings
2401
1739
server_config = configparser.SafeConfigParser(server_defaults)
2402
1740
del server_defaults
2403
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1741
server_config.read(os.path.join(options.configdir,
1742
"mandos.conf"))
2404
1743
# Convert the SafeConfigParser object to a dict
2405
1744
server_settings = server_config.defaults()
2406
1745
# Use the appropriate methods on the non-string config options
2407
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
1746
for option in ("debug", "use_dbus", "use_ipv6"):
2408
1747
server_settings[option] = server_config.getboolean("DEFAULT",
2409
1748
option)
2410
1749
if server_settings["port"]:
2411
1750
server_settings["port"] = server_config.getint("DEFAULT",
2412
1751
"port")
2413
if server_settings["socket"]:
2414
server_settings["socket"] = server_config.getint("DEFAULT",
2415
"socket")
2416
# Later, stdin will, and stdout and stderr might, be dup'ed
2417
# over with an opened os.devnull. But we don't want this to
2418
# happen with a supplied network socket.
2419
if 0 <= server_settings["socket"] <= 2:
2420
server_settings["socket"] = os.dup(server_settings
2421
["socket"])
2422
1752
del server_config
2423
1753
2424
1754
# Override the settings from the config file with command line
2425
1755
# options, if set.
2426
1756
for option in ("interface", "address", "port", "debug",
2427
"priority", "servicename", "configdir", "use_dbus",
2428
"use_ipv6", "debuglevel", "restore", "statedir",
2429
"socket", "foreground", "zeroconf"):
1757
"priority", "servicename", "configdir",
1758
"use_dbus", "use_ipv6", "debuglevel"):
2430
1759
value = getattr(options, option)
2431
1760
if value is not None:
2432
1761
server_settings[option] = value
2433
1762
del options
2434
1763
# Force all strings to be unicode
2435
1764
for option in server_settings.keys():
2436
if isinstance(server_settings[option], bytes):
2437
server_settings[option] = (server_settings[option]
2438
.decode("utf-8"))
2439
# Force all boolean options to be boolean
2440
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2441
"foreground", "zeroconf"):
2442
server_settings[option] = bool(server_settings[option])
2443
# Debug implies foreground
2444
if server_settings["debug"]:
2445
server_settings["foreground"] = True
1765
if type(server_settings[option]) is str:
1766
server_settings[option] = unicode(server_settings[option])
2446
1767
# Now we have our good server settings in "server_settings"
2447
1768
2448
1769
##################################################################
2449
1770
2450
if (not server_settings["zeroconf"]
2451
and not (server_settings["port"]
2452
or server_settings["socket"] != "")):
2453
parser.error("Needs port or socket to work without Zeroconf")
2454
2455
1771
# For convenience
2456
1772
debug = server_settings["debug"]
2457
1773
debuglevel = server_settings["debuglevel"]
2458
1774
use_dbus = server_settings["use_dbus"]
2459
1775
use_ipv6 = server_settings["use_ipv6"]
2460
stored_state_path = os.path.join(server_settings["statedir"],
2461
stored_state_file)
2462
foreground = server_settings["foreground"]
2463
zeroconf = server_settings["zeroconf"]
2464
2465
if debug:
2466
initlogger(debug, logging.DEBUG)
2467
else:
2468
if not debuglevel:
2469
initlogger(debug)
2470
else:
2471
level = getattr(logging, debuglevel.upper())
2472
initlogger(debug, level)
2473
1776
2474
1777
if server_settings["servicename"] != "Mandos":
2475
syslogger.setFormatter(
2476
logging.Formatter('Mandos ({}) [%(process)d]:'
2477
' %(levelname)s: %(message)s'.format(
2478
server_settings["servicename"])))
1778
syslogger.setFormatter(logging.Formatter
1779
('Mandos (%s) [%%(process)d]:'
1780
' %%(levelname)s: %%(message)s'
1781
% server_settings["servicename"]))
2479
1782
2480
1783
# Parse config file with clients
2481
client_config = configparser.SafeConfigParser(Client
2482
.client_defaults)
1784
client_defaults = { "timeout": "5m",
1785
"extended_timeout": "15m",
1786
"interval": "2m",
1787
"checker": "fping -q -- %%(host)s",
1788
"host": "",
1789
"approval_delay": "0s",
1790
"approval_duration": "1s",
1791
}
1792
client_config = configparser.SafeConfigParser(client_defaults)
2483
1793
client_config.read(os.path.join(server_settings["configdir"],
2484
1794
"clients.conf"))
2485
1795
2486
1796
global mandos_dbus_service
2487
1797
mandos_dbus_service = None
2488
1798
2489
socketfd = None
2490
if server_settings["socket"] != "":
2491
socketfd = server_settings["socket"]
2492
tcp_server = MandosServer(
2493
(server_settings["address"], server_settings["port"]),
2494
ClientHandler,
2495
interface=(server_settings["interface"] or None),
2496
use_ipv6=use_ipv6,
2497
gnutls_priority=server_settings["priority"],
2498
use_dbus=use_dbus,
2499
socketfd=socketfd)
2500
if not foreground:
2501
pidfilename = "/run/mandos.pid"
2502
if not os.path.isdir("/run/."):
2503
pidfilename = "/var/run/mandos.pid"
2504
pidfile = None
1799
tcp_server = MandosServer((server_settings["address"],
1800
server_settings["port"]),
1801
ClientHandler,
1802
interface=(server_settings["interface"]
1803
or None),
1804
use_ipv6=use_ipv6,
1805
gnutls_priority=
1806
server_settings["priority"],
1807
use_dbus=use_dbus)
1808
if not debug:
1809
pidfilename = "/var/run/mandos.pid"
2505
1810
try:
2506
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
2507
except IOError as e:
2508
logger.error("Could not open file %r", pidfilename,
2509
exc_info=e)
1811
pidfile = open(pidfilename, "w")
1812
except IOError:
1813
logger.error("Could not open file %r", pidfilename)
2510
1814
2511
for name in ("_mandos", "mandos", "nobody"):
1815
try:
1816
uid = pwd.getpwnam("_mandos").pw_uid
1817
gid = pwd.getpwnam("_mandos").pw_gid
1818
except KeyError:
2512
1819
try:
2513
uid = pwd.getpwnam(name).pw_uid
2514
gid = pwd.getpwnam(name).pw_gid
2515
break
1820
uid = pwd.getpwnam("mandos").pw_uid
1821
gid = pwd.getpwnam("mandos").pw_gid
2516
1822
except KeyError:
2517
continue
2518
else:
2519
uid = 65534
2520
gid = 65534
1823
try:
1824
uid = pwd.getpwnam("nobody").pw_uid
1825
gid = pwd.getpwnam("nobody").pw_gid
1826
except KeyError:
1827
uid = 65534
1828
gid = 65534
2521
1829
try:
2522
1830
os.setgid(gid)
2523
1831
os.setuid(uid)
2524
1832
except OSError as error:
2525
if error.errno != errno.EPERM:
2526
raise
1833
if error[0] != errno.EPERM:
1834
raise error
2527
1835
1836
if not debug and not debuglevel:
1837
syslogger.setLevel(logging.WARNING)
1838
console.setLevel(logging.WARNING)
1839
if debuglevel:
1840
level = getattr(logging, debuglevel.upper())
1841
syslogger.setLevel(level)
1842
console.setLevel(level)
1843
2528
1844
if debug:
2529
1845
# Enable all possible GnuTLS debugging
2530
1846
2536
1852
def debug_gnutls(level, string):
2537
1853
logger.debug("GnuTLS: %s", string[:-1])
2538
1854
2539
gnutls.library.functions.gnutls_global_set_log_function(
2540
debug_gnutls)
1855
(gnutls.library.functions
1856
.gnutls_global_set_log_function(debug_gnutls))
2541
1857
2542
1858
# Redirect stdin so all checkers get /dev/null
2543
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1859
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2544
1860
os.dup2(null, sys.stdin.fileno())
2545
1861
if null > 2:
2546
1862
os.close(null)
1863
else:
1864
# No console logging
1865
logger.removeHandler(console)
2547
1866
2548
1867
# Need to fork before connecting to D-Bus
2549
if not foreground:
1868
if not debug:
2550
1869
# Close all input and output, do double fork, etc.
2551
1870
daemon()
2552
1871
2553
# multiprocessing will use threads, so before we use gobject we
2554
# need to inform gobject that threads will be used.
2555
gobject.threads_init()
2556
2557
1872
global main_loop
2558
1873
# From the Avahi example code
2559
DBusGMainLoop(set_as_default=True)
1874
DBusGMainLoop(set_as_default=True )
2560
1875
main_loop = gobject.MainLoop()
2561
1876
bus = dbus.SystemBus()
2562
1877
# End of Avahi example code
2563
1878
if use_dbus:
2564
1879
try:
2565
bus_name = dbus.service.BusName("se.recompile.Mandos",
2566
bus,
2567
do_not_queue=True)
2568
old_bus_name = dbus.service.BusName(
2569
"se.bsnet.fukt.Mandos", bus,
2570
do_not_queue=True)
2571
except dbus.exceptions.DBusException as e:
2572
logger.error("Disabling D-Bus:", exc_info=e)
1880
bus_name = dbus.service.BusName("se.bsnet.fukt.Mandos",
1881
bus, do_not_queue=True)
1882
except dbus.exceptions.NameExistsException as e:
1883
logger.error(unicode(e) + ", disabling D-Bus")
2573
1884
use_dbus = False
2574
1885
server_settings["use_dbus"] = False
2575
1886
tcp_server.use_dbus = False
2576
if zeroconf:
2577
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2578
service = AvahiServiceToSyslog(
2579
name = server_settings["servicename"],
2580
servicetype = "_mandos._tcp",
2581
protocol = protocol,
2582
bus = bus)
2583
if server_settings["interface"]:
2584
service.interface = if_nametoindex(
2585
server_settings["interface"].encode("utf-8"))
1887
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1888
service = AvahiService(name = server_settings["servicename"],
1889
servicetype = "_mandos._tcp",
1890
protocol = protocol, bus = bus)
1891
if server_settings["interface"]:
1892
service.interface = (if_nametoindex
1893
(str(server_settings["interface"])))
2586
1894
2587
1895
global multiprocessing_manager
2588
1896
multiprocessing_manager = multiprocessing.Manager()
2590
1898
client_class = Client
2591
1899
if use_dbus:
2592
1900
client_class = functools.partial(ClientDBus, bus = bus)
2593
2594
client_settings = Client.config_parser(client_config)
2595
old_client_settings = {}
2596
clients_data = {}
2597
2598
# This is used to redirect stdout and stderr for checker processes
2599
global wnull
2600
wnull = open(os.devnull, "w") # A writable /dev/null
2601
# Only used if server is running in foreground but not in debug
2602
# mode
2603
if debug or not foreground:
2604
wnull.close()
2605
2606
# Get client data and settings from last running state.
2607
if server_settings["restore"]:
2608
try:
2609
with open(stored_state_path, "rb") as stored_state:
2610
clients_data, old_client_settings = pickle.load(
2611
stored_state)
2612
os.remove(stored_state_path)
2613
except IOError as e:
2614
if e.errno == errno.ENOENT:
2615
logger.warning("Could not load persistent state:"
2616
" {}".format(os.strerror(e.errno)))
2617
else:
2618
logger.critical("Could not load persistent state:",
2619
exc_info=e)
2620
raise
2621
except EOFError as e:
2622
logger.warning("Could not load persistent state: "
2623
"EOFError:",
2624
exc_info=e)
2625
2626
with PGPEngine() as pgp:
2627
for client_name, client in clients_data.items():
2628
# Skip removed clients
2629
if client_name not in client_settings:
2630
continue
2631
2632
# Decide which value to use after restoring saved state.
2633
# We have three different values: Old config file,
2634
# new config file, and saved state.
2635
# New config value takes precedence if it differs from old
2636
# config value, otherwise use saved state.
2637
for name, value in client_settings[client_name].items():
2638
try:
2639
# For each value in new config, check if it
2640
# differs from the old config value (Except for
2641
# the "secret" attribute)
2642
if (name != "secret"
2643
and (value !=
2644
old_client_settings[client_name][name])):
2645
client[name] = value
2646
except KeyError:
2647
pass
2648
2649
# Clients who has passed its expire date can still be
2650
# enabled if its last checker was successful. Clients
2651
# whose checker succeeded before we stored its state is
2652
# assumed to have successfully run all checkers during
2653
# downtime.
2654
if client["enabled"]:
2655
if datetime.datetime.utcnow() >= client["expires"]:
2656
if not client["last_checked_ok"]:
2657
logger.warning(
2658
"disabling client {} - Client never "
2659
"performed a successful checker".format(
2660
client_name))
2661
client["enabled"] = False
2662
elif client["last_checker_status"] != 0:
2663
logger.warning(
2664
"disabling client {} - Client last"
2665
" checker failed with error code"
2666
" {}".format(
2667
client_name,
2668
client["last_checker_status"]))
2669
client["enabled"] = False
2670
else:
2671
client["expires"] = (
2672
datetime.datetime.utcnow()
2673
+ client["timeout"])
2674
logger.debug("Last checker succeeded,"
2675
" keeping {} enabled".format(
2676
client_name))
1901
def client_config_items(config, section):
1902
special_settings = {
1903
"approved_by_default":
1904
lambda: config.getboolean(section,
1905
"approved_by_default"),
1906
}
1907
for name, value in config.items(section):
2677
1908
try:
2678
client["secret"] = pgp.decrypt(
2679
client["encrypted_secret"],
2680
client_settings[client_name]["secret"])
2681
except PGPError:
2682
# If decryption fails, we use secret from new settings
2683
logger.debug("Failed to decrypt {} old secret".format(
2684
client_name))
2685
client["secret"] = (client_settings[client_name]
2686
["secret"])
2687
2688
# Add/remove clients based on new changes made to config
2689
for client_name in (set(old_client_settings)
2690
- set(client_settings)):
2691
del clients_data[client_name]
2692
for client_name in (set(client_settings)
2693
- set(old_client_settings)):
2694
clients_data[client_name] = client_settings[client_name]
2695
2696
# Create all client objects
2697
for client_name, client in clients_data.items():
2698
tcp_server.clients[client_name] = client_class(
2699
name = client_name,
2700
settings = client,
2701
server_settings = server_settings)
2702
1909
yield (name, special_settings[name]())
1910
except KeyError:
1911
yield (name, value)
1912
1913
tcp_server.clients.update(set(
1914
client_class(name = section,
1915
config= dict(client_config_items(
1916
client_config, section)))
1917
for section in client_config.sections()))
2703
1918
if not tcp_server.clients:
2704
1919
logger.warning("No clients defined")
2705
2706
if not foreground:
2707
if pidfile is not None:
2708
pid = os.getpid()
2709
try:
2710
with pidfile:
2711
print(pid, file=pidfile)
2712
except IOError:
2713
logger.error("Could not write to file %r with PID %d",
2714
pidfilename, pid)
2715
del pidfile
1920
1921
if not debug:
1922
try:
1923
with pidfile:
1924
pid = os.getpid()
1925
pidfile.write(str(pid) + "\n".encode("utf-8"))
1926
del pidfile
1927
except IOError:
1928
logger.error("Could not write to file %r with PID %d",
1929
pidfilename, pid)
1930
except NameError:
1931
# "pidfile" was never created
1932
pass
2716
1933
del pidfilename
2717
1934
1935
signal.signal(signal.SIGINT, signal.SIG_IGN)
1936
2718
1937
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2719
1938
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2720
1939
2721
1940
if use_dbus:
2722
2723
@alternate_dbus_interfaces(
2724
{ "se.recompile.Mandos": "se.bsnet.fukt.Mandos" })
2725
class MandosDBusService(DBusObjectWithProperties):
1941
class MandosDBusService(dbus.service.Object):
2726
1942
"""A D-Bus proxy object"""
2727
2728
1943
def __init__(self):
2729
1944
dbus.service.Object.__init__(self, bus, "/")
2730
2731
_interface = "se.recompile.Mandos"
2732
2733
@dbus_interface_annotations(_interface)
2734
def _foo(self):
2735
return {
2736
"org.freedesktop.DBus.Property.EmitsChangedSignal":
2737
"false" }
1945
_interface = "se.bsnet.fukt.Mandos"
2738
1946
2739
1947
@dbus.service.signal(_interface, signature="o")
2740
1948
def ClientAdded(self, objpath):
2754
1962
@dbus.service.method(_interface, out_signature="ao")
2755
1963
def GetAllClients(self):
2756
1964
"D-Bus method"
2757
return dbus.Array(c.dbus_object_path for c in
2758
tcp_server.clients.itervalues())
1965
return dbus.Array(c.dbus_object_path
1966
for c in tcp_server.clients)
2759
1967
2760
1968
@dbus.service.method(_interface,
2761
1969
out_signature="a{oa{sv}}")
2762
1970
def GetAllClientsWithProperties(self):
2763
1971
"D-Bus method"
2764
1972
return dbus.Dictionary(
2765
{ c.dbus_object_path: c.GetAll("")
2766
for c in tcp_server.clients.itervalues() },
1973
((c.dbus_object_path, c.GetAll(""))
1974
for c in tcp_server.clients),
2767
1975
signature="oa{sv}")
2768
1976
2769
1977
@dbus.service.method(_interface, in_signature="o")
2770
1978
def RemoveClient(self, object_path):
2771
1979
"D-Bus method"
2772
for c in tcp_server.clients.itervalues():
1980
for c in tcp_server.clients:
2773
1981
if c.dbus_object_path == object_path:
2774
del tcp_server.clients[c.name]
1982
tcp_server.clients.remove(c)
2775
1983
c.remove_from_connection()
2776
1984
# Don't signal anything except ClientRemoved
2777
1985
c.disable(quiet=True)
2786
1994
2787
1995
def cleanup():
2788
1996
"Cleanup function; run on exit"
2789
if zeroconf:
2790
service.cleanup()
2791
2792
multiprocessing.active_children()
2793
wnull.close()
2794
if not (tcp_server.clients or client_settings):
2795
return
2796
2797
# Store client before exiting. Secrets are encrypted with key
2798
# based on what config file has. If config file is
2799
# removed/edited, old secret will thus be unrecovable.
2800
clients = {}
2801
with PGPEngine() as pgp:
2802
for client in tcp_server.clients.itervalues():
2803
key = client_settings[client.name]["secret"]
2804
client.encrypted_secret = pgp.encrypt(client.secret,
2805
key)
2806
client_dict = {}
2807
2808
# A list of attributes that can not be pickled
2809
# + secret.
2810
exclude = { "bus", "changedstate", "secret",
2811
"checker", "server_settings" }
2812
for name, typ in inspect.getmembers(dbus.service
2813
.Object):
2814
exclude.add(name)
2815
2816
client_dict["encrypted_secret"] = (client
2817
.encrypted_secret)
2818
for attr in client.client_structure:
2819
if attr not in exclude:
2820
client_dict[attr] = getattr(client, attr)
2821
2822
clients[client.name] = client_dict
2823
del client_settings[client.name]["secret"]
2824
2825
try:
2826
with tempfile.NamedTemporaryFile(
2827
mode='wb',
2828
suffix=".pickle",
2829
prefix='clients-',
2830
dir=os.path.dirname(stored_state_path),
2831
delete=False) as stored_state:
2832
pickle.dump((clients, client_settings), stored_state)
2833
tempname = stored_state.name
2834
os.rename(tempname, stored_state_path)
2835
except (IOError, OSError) as e:
2836
if not debug:
2837
try:
2838
os.remove(tempname)
2839
except NameError:
2840
pass
2841
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
2842
logger.warning("Could not save persistent state: {}"
2843
.format(os.strerror(e.errno)))
2844
else:
2845
logger.warning("Could not save persistent state:",
2846
exc_info=e)
2847
raise
2848
2849
# Delete all clients, and settings from config
1997
service.cleanup()
1998
2850
1999
while tcp_server.clients:
2851
name, client = tcp_server.clients.popitem()
2000
client = tcp_server.clients.pop()
2852
2001
if use_dbus:
2853
2002
client.remove_from_connection()
2003
client.disable_hook = None
2854
2004
# Don't signal anything except ClientRemoved
2855
2005
client.disable(quiet=True)
2856
2006
if use_dbus:
2857
2007
# Emit D-Bus signal
2858
mandos_dbus_service.ClientRemoved(
2859
client.dbus_object_path, client.name)
2860
client_settings.clear()
2008
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
2009
client.name)
2861
2010
2862
2011
atexit.register(cleanup)
2863
2012
2864
for client in tcp_server.clients.itervalues():
2013
for client in tcp_server.clients:
2865
2014
if use_dbus:
2866
2015
# Emit D-Bus signal
2867
2016
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2868
# Need to initiate checking of clients
2869
if client.enabled:
2870
client.init_checker()
2017
client.enable()
2871
2018
2872
2019
tcp_server.enable()
2873
2020
tcp_server.server_activate()
2874
2021
2875
2022
# Find out what port we got
2876
if zeroconf:
2877
service.port = tcp_server.socket.getsockname()[1]
2023
service.port = tcp_server.socket.getsockname()[1]
2878
2024
if use_ipv6:
2879
2025
logger.info("Now listening on address %r, port %d,"
2880
" flowinfo %d, scope_id %d",
2881
*tcp_server.socket.getsockname())
2026
" flowinfo %d, scope_id %d"
2027
% tcp_server.socket.getsockname())
2882
2028
else: # IPv4
2883
logger.info("Now listening on address %r, port %d",
2884
*tcp_server.socket.getsockname())
2029
logger.info("Now listening on address %r, port %d"
2030
% tcp_server.socket.getsockname())
2885
2031
2886
2032
#service.interface = tcp_server.socket.getsockname()[3]
2887
2033
2888
2034
try:
2889
if zeroconf:
2890
# From the Avahi example code
2891
try:
2892
service.activate()
2893
except dbus.exceptions.DBusException as error:
2894
logger.critical("D-Bus Exception", exc_info=error)
2895
cleanup()
2896
sys.exit(1)
2897
# End of Avahi example code
2035
# From the Avahi example code
2036
try:
2037
service.activate()
2038
except dbus.exceptions.DBusException as error:
2039
logger.critical("DBusException: %s", error)
2040
cleanup()
2041
sys.exit(1)
2042
# End of Avahi example code
2898
2043
2899
2044
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2900
2045
lambda *args, **kwargs:
2904
2049
logger.debug("Starting main loop")
2905
2050
main_loop.run()
2906
2051
except AvahiError as error:
2907
logger.critical("Avahi Error", exc_info=error)
2052
logger.critical("AvahiError: %s", error)
2908
2053
cleanup()
2909
2054
sys.exit(1)
2910
2055
except KeyboardInterrupt:
2915
2060
# Must run before the D-Bus bus name gets deregistered
2916
2061
cleanup()
2917
2062
2918
2919
2063
if __name__ == '__main__':
2920
2064
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0