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- Committer: Teddy Hogeborn
- Date: 2011-08-08 21:12:37 UTC
- Revision ID: teddy@fukt.bsnet.se-20110808211237-jejsz5brjytrjot8
* Makefile (DOCS): Added "intro.8mandos".
(intro.8mandos, intro.8mandos.xhtml): New.
* README: Replaced text with link, reference and short summary.
* intro.xml: New.
* mandos-clients.conf.xml (SEE ALSO): Added "intro(8mandos)".
* mandos-ctl.xml (SEE ALSO): - '' -
* mandos-keygen.xml (SEE ALSO): - '' -
* mandos-monitor.xml (SEE ALSO): - '' -
* mandos.conf.xml (SEE ALSO): - '' -
* mandos.xml (SEE ALSO): - '' -
* plugin-runner.xml (SEE ALSO): - '' -
* plugins.d/askpass-fifo.xml (SEE ALSO): - '' -
* plugins.d/mandos-client.xml (SEE ALSO): - '' -
* plugins.d/password-prompt.xml (SEE ALSO): - '' -
* plugins.d/plymouth.xml (SEE ALSO): - '' -
* plugins.d/splashy.xml (SEE ALSO): - '' -
* plugins.d/usplash.xml (SEE ALSO): - '' -
(intro.8mandos, intro.8mandos.xhtml): New.
* README: Replaced text with link, reference and short summary.
* intro.xml: New.
* mandos-clients.conf.xml (SEE ALSO): Added "intro(8mandos)".
* mandos-ctl.xml (SEE ALSO): - '' -
* mandos-keygen.xml (SEE ALSO): - '' -
* mandos-monitor.xml (SEE ALSO): - '' -
* mandos.conf.xml (SEE ALSO): - '' -
* mandos.xml (SEE ALSO): - '' -
* plugin-runner.xml (SEE ALSO): - '' -
* plugins.d/askpass-fifo.xml (SEE ALSO): - '' -
* plugins.d/mandos-client.xml (SEE ALSO): - '' -
* plugins.d/password-prompt.xml (SEE ALSO): - '' -
* plugins.d/plymouth.xml (SEE ALSO): - '' -
* plugins.d/splashy.xml (SEE ALSO): - '' -
* plugins.d/usplash.xml (SEE ALSO): - '' -
- files removed:
- debian/mandos-client.examples
- debian/upstream
- network-hooks.d
- plugin-helpers
- files modified:
- .bzrignore
added
removed
mandos
1
#!/usr/bin/python2.7
1
#!/usr/bin/python
2
2
# -*- mode: python; coding: utf-8 -*-
3
3
#
4
4
# Mandos server - give out binary blobs to connecting clients.
11
11
# "AvahiService" class, and some lines in "main".
12
12
#
13
13
# Everything else is
14
# Copyright © 2008-2015 Teddy Hogeborn
15
# Copyright © 2008-2015 Björn Påhlsson
14
# Copyright © 2008-2011 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 = "1.7.1"
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:
395
245
logger.error(bad_states[state] + ": %r", error)
396
246
self.cleanup()
397
247
elif state == avahi.SERVER_RUNNING:
398
try:
399
self.add()
400
except dbus.exceptions.DBusException as error:
401
if (error.get_dbus_name()
402
== "org.freedesktop.Avahi.CollisionError"):
403
logger.info("Local Zeroconf service name"
404
" collision.")
405
return self.rename(remove=False)
406
else:
407
logger.critical("D-Bus Exception", exc_info=error)
408
self.cleanup()
409
os._exit(1)
248
self.add()
410
249
else:
411
250
if error is None:
412
251
logger.debug("Unknown state: %r", state)
413
252
else:
414
253
logger.debug("Unknown state: %r: %r", state, error)
415
416
254
def activate(self):
417
255
"""Derived from the Avahi example code"""
418
256
if self.server is None:
422
260
follow_name_owner_changes=True),
423
261
avahi.DBUS_INTERFACE_SERVER)
424
262
self.server.connect_to_signal("StateChanged",
425
self.server_state_changed)
263
self.server_state_changed)
426
264
self.server_state_changed(self.server.GetState())
427
265
428
266
429
class AvahiServiceToSyslog(AvahiService):
430
def rename(self, *args, **kwargs):
431
"""Add the new name to the syslog messages"""
432
ret = AvahiService.rename(self, *args, **kwargs)
433
syslogger.setFormatter(logging.Formatter(
434
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
435
.format(self.name)))
436
return ret
437
438
def call_pipe(connection, # : multiprocessing.Connection
439
func, *args, **kwargs):
440
"""This function is meant to be called by multiprocessing.Process
441
442
This function runs func(*args, **kwargs), and writes the resulting
443
return value on the provided multiprocessing.Connection.
444
"""
445
connection.send(func(*args, **kwargs))
446
connection.close()
447
448
267
class Client(object):
449
268
"""A representation of a client host served by this server.
450
269
451
270
Attributes:
452
approved: bool(); 'None' if not yet approved/disapproved
271
_approved: bool(); 'None' if not yet approved/disapproved
453
272
approval_delay: datetime.timedelta(); Time to wait for approval
454
273
approval_duration: datetime.timedelta(); Duration of one approval
455
274
checker: subprocess.Popen(); a running checker process used
462
281
instance %(name)s can be used in the command.
463
282
checker_initiator_tag: a gobject event source tag, or None
464
283
created: datetime.datetime(); (UTC) object creation
465
client_structure: Object describing what attributes a client has
466
and is used for storing the client at exit
467
284
current_checker_command: string; current running checker_command
285
disable_hook: If set, called by disable() as disable_hook(self)
468
286
disable_initiator_tag: a gobject event source tag, or None
469
287
enabled: bool()
470
288
fingerprint: string (40 or 32 hexadecimal digits); used to
473
291
interval: datetime.timedelta(); How often to start a new checker
474
292
last_approval_request: datetime.datetime(); (UTC) or None
475
293
last_checked_ok: datetime.datetime(); (UTC) or None
476
last_checker_status: integer between 0 and 255 reflecting exit
477
status of last checker. -1 reflects crashed
478
checker, -2 means no checker completed yet.
479
last_checker_signal: The signal which killed the last checker, if
480
last_checker_status is -1
481
last_enabled: datetime.datetime(); (UTC) or None
294
last_enabled: datetime.datetime(); (UTC)
482
295
name: string; from the config file, used in log messages and
483
296
D-Bus identifiers
484
297
secret: bytestring; sent verbatim (over TLS) to client
485
298
timeout: datetime.timedelta(); How long from last_checked_ok
486
299
until this client is disabled
487
extended_timeout: extra long timeout when secret has been sent
488
300
runtime_expansions: Allowed attributes for runtime expansion.
489
expires: datetime.datetime(); time (UTC) when a client will be
490
disabled, or None
491
server_settings: The server_settings dict from main()
492
301
"""
493
302
494
303
runtime_expansions = ("approval_delay", "approval_duration",
495
"created", "enabled", "expires",
496
"fingerprint", "host", "interval",
497
"last_approval_request", "last_checked_ok",
304
"created", "enabled", "fingerprint",
305
"host", "interval", "last_checked_ok",
498
306
"last_enabled", "name", "timeout")
499
client_defaults = {
500
"timeout": "PT5M",
501
"extended_timeout": "PT15M",
502
"interval": "PT2M",
503
"checker": "fping -q -- %%(host)s",
504
"host": "",
505
"approval_delay": "PT0S",
506
"approval_duration": "PT1S",
507
"approved_by_default": "True",
508
"enabled": "True",
509
}
510
307
511
308
@staticmethod
512
def config_parser(config):
513
"""Construct a new dict of client settings of this form:
514
{ client_name: {setting_name: value, ...}, ...}
515
with exceptions for any special settings as defined above.
516
NOTE: Must be a pure function. Must return the same result
517
value given the same arguments.
518
"""
519
settings = {}
520
for client_name in config.sections():
521
section = dict(config.items(client_name))
522
client = settings[client_name] = {}
523
524
client["host"] = section["host"]
525
# Reformat values from string types to Python types
526
client["approved_by_default"] = config.getboolean(
527
client_name, "approved_by_default")
528
client["enabled"] = config.getboolean(client_name,
529
"enabled")
530
531
# Uppercase and remove spaces from fingerprint for later
532
# comparison purposes with return value from the
533
# fingerprint() function
534
client["fingerprint"] = (section["fingerprint"].upper()
535
.replace(" ", ""))
536
if "secret" in section:
537
client["secret"] = section["secret"].decode("base64")
538
elif "secfile" in section:
539
with open(os.path.expanduser(os.path.expandvars
540
(section["secfile"])),
541
"rb") as secfile:
542
client["secret"] = secfile.read()
543
else:
544
raise TypeError("No secret or secfile for section {}"
545
.format(section))
546
client["timeout"] = string_to_delta(section["timeout"])
547
client["extended_timeout"] = string_to_delta(
548
section["extended_timeout"])
549
client["interval"] = string_to_delta(section["interval"])
550
client["approval_delay"] = string_to_delta(
551
section["approval_delay"])
552
client["approval_duration"] = string_to_delta(
553
section["approval_duration"])
554
client["checker_command"] = section["checker"]
555
client["last_approval_request"] = None
556
client["last_checked_ok"] = None
557
client["last_checker_status"] = -2
558
559
return settings
560
561
def __init__(self, settings, name = None, server_settings=None):
309
def _timedelta_to_milliseconds(td):
310
"Convert a datetime.timedelta() to milliseconds"
311
return ((td.days * 24 * 60 * 60 * 1000)
312
+ (td.seconds * 1000)
313
+ (td.microseconds // 1000))
314
315
def timeout_milliseconds(self):
316
"Return the 'timeout' attribute in milliseconds"
317
return self._timedelta_to_milliseconds(self.timeout)
318
319
def interval_milliseconds(self):
320
"Return the 'interval' attribute in milliseconds"
321
return self._timedelta_to_milliseconds(self.interval)
322
323
def approval_delay_milliseconds(self):
324
return self._timedelta_to_milliseconds(self.approval_delay)
325
326
def __init__(self, name = None, disable_hook=None, config=None):
327
"""Note: the 'checker' key in 'config' sets the
328
'checker_command' attribute and *not* the 'checker'
329
attribute."""
562
330
self.name = name
563
if server_settings is None:
564
server_settings = {}
565
self.server_settings = server_settings
566
# adding all client settings
567
for setting, value in settings.items():
568
setattr(self, setting, value)
569
570
if self.enabled:
571
if not hasattr(self, "last_enabled"):
572
self.last_enabled = datetime.datetime.utcnow()
573
if not hasattr(self, "expires"):
574
self.expires = (datetime.datetime.utcnow()
575
+ self.timeout)
576
else:
577
self.last_enabled = None
578
self.expires = None
579
331
if config is None:
332
config = {}
580
333
logger.debug("Creating client %r", self.name)
334
# Uppercase and remove spaces from fingerprint for later
335
# comparison purposes with return value from the fingerprint()
336
# function
337
self.fingerprint = (config["fingerprint"].upper()
338
.replace(" ", ""))
581
339
logger.debug(" Fingerprint: %s", self.fingerprint)
582
self.created = settings.get("created",
583
datetime.datetime.utcnow())
584
585
# attributes specific for this server instance
340
if "secret" in config:
341
self.secret = config["secret"].decode("base64")
342
elif "secfile" in config:
343
with open(os.path.expanduser(os.path.expandvars
344
(config["secfile"])),
345
"rb") as secfile:
346
self.secret = secfile.read()
347
else:
348
raise TypeError("No secret or secfile for client %s"
349
% self.name)
350
self.host = config.get("host", "")
351
self.created = datetime.datetime.utcnow()
352
self.enabled = False
353
self.last_approval_request = None
354
self.last_enabled = None
355
self.last_checked_ok = None
356
self.timeout = string_to_delta(config["timeout"])
357
self.interval = string_to_delta(config["interval"])
358
self.disable_hook = disable_hook
586
359
self.checker = None
587
360
self.checker_initiator_tag = None
588
361
self.disable_initiator_tag = None
589
362
self.checker_callback_tag = None
363
self.checker_command = config["checker"]
590
364
self.current_checker_command = None
591
self.approved = None
365
self.last_connect = None
366
self._approved = None
367
self.approved_by_default = config.get("approved_by_default",
368
True)
592
369
self.approvals_pending = 0
593
self.changedstate = multiprocessing_manager.Condition(
594
multiprocessing_manager.Lock())
595
self.client_structure = [attr
596
for attr in self.__dict__.iterkeys()
597
if not attr.startswith("_")]
598
self.client_structure.append("client_structure")
599
600
for name, t in inspect.getmembers(
601
type(self), lambda obj: isinstance(obj, property)):
602
if not name.startswith("_"):
603
self.client_structure.append(name)
370
self.approval_delay = string_to_delta(
371
config["approval_delay"])
372
self.approval_duration = string_to_delta(
373
config["approval_duration"])
374
self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())
604
375
605
# Send notice to process children that client state has changed
606
376
def send_changedstate(self):
607
with self.changedstate:
608
self.changedstate.notify_all()
609
377
self.changedstate.acquire()
378
self.changedstate.notify_all()
379
self.changedstate.release()
380
610
381
def enable(self):
611
382
"""Start this client's checker and timeout hooks"""
612
383
if getattr(self, "enabled", False):
613
384
# Already enabled
614
385
return
615
self.expires = datetime.datetime.utcnow() + self.timeout
616
self.enabled = True
386
self.send_changedstate()
617
387
self.last_enabled = datetime.datetime.utcnow()
618
self.init_checker()
619
self.send_changedstate()
388
# Schedule a new checker to be started an 'interval' from now,
389
# and every interval from then on.
390
self.checker_initiator_tag = (gobject.timeout_add
391
(self.interval_milliseconds(),
392
self.start_checker))
393
# Schedule a disable() when 'timeout' has passed
394
self.disable_initiator_tag = (gobject.timeout_add
395
(self.timeout_milliseconds(),
396
self.disable))
397
self.enabled = True
398
# Also start a new checker *right now*.
399
self.start_checker()
620
400
621
401
def disable(self, quiet=True):
622
402
"""Disable this client."""
623
403
if not getattr(self, "enabled", False):
624
404
return False
625
405
if not quiet:
406
self.send_changedstate()
407
if not quiet:
626
408
logger.info("Disabling client %s", self.name)
627
if getattr(self, "disable_initiator_tag", None) is not None:
409
if getattr(self, "disable_initiator_tag", False):
628
410
gobject.source_remove(self.disable_initiator_tag)
629
411
self.disable_initiator_tag = None
630
self.expires = None
631
if getattr(self, "checker_initiator_tag", None) is not None:
412
if getattr(self, "checker_initiator_tag", False):
632
413
gobject.source_remove(self.checker_initiator_tag)
633
414
self.checker_initiator_tag = None
634
415
self.stop_checker()
416
if self.disable_hook:
417
self.disable_hook(self)
635
418
self.enabled = False
636
if not quiet:
637
self.send_changedstate()
638
419
# Do not run this again if called by a gobject.timeout_add
639
420
return False
640
421
641
422
def __del__(self):
423
self.disable_hook = None
642
424
self.disable()
643
425
644
def init_checker(self):
645
# Schedule a new checker to be started an 'interval' from now,
646
# and every interval from then on.
647
if self.checker_initiator_tag is not None:
648
gobject.source_remove(self.checker_initiator_tag)
649
self.checker_initiator_tag = gobject.timeout_add(
650
int(self.interval.total_seconds() * 1000),
651
self.start_checker)
652
# Schedule a disable() when 'timeout' has passed
653
if self.disable_initiator_tag is not None:
654
gobject.source_remove(self.disable_initiator_tag)
655
self.disable_initiator_tag = gobject.timeout_add(
656
int(self.timeout.total_seconds() * 1000), self.disable)
657
# Also start a new checker *right now*.
658
self.start_checker()
659
660
def checker_callback(self, source, condition, connection,
661
command):
426
def checker_callback(self, pid, condition, command):
662
427
"""The checker has completed, so take appropriate actions."""
663
428
self.checker_callback_tag = None
664
429
self.checker = None
665
# Read return code from connection (see call_pipe)
666
returncode = connection.recv()
667
connection.close()
668
669
if returncode >= 0:
670
self.last_checker_status = returncode
671
self.last_checker_signal = None
672
if self.last_checker_status == 0:
430
if os.WIFEXITED(condition):
431
exitstatus = os.WEXITSTATUS(condition)
432
if exitstatus == 0:
673
433
logger.info("Checker for %(name)s succeeded",
674
434
vars(self))
675
435
self.checked_ok()
676
436
else:
677
logger.info("Checker for %(name)s failed", vars(self))
437
logger.info("Checker for %(name)s failed",
438
vars(self))
678
439
else:
679
self.last_checker_status = -1
680
self.last_checker_signal = -returncode
681
440
logger.warning("Checker for %(name)s crashed?",
682
441
vars(self))
683
return False
684
442
685
443
def checked_ok(self):
686
"""Assert that the client has been seen, alive and well."""
444
"""Bump up the timeout for this client.
445
446
This should only be called when the client has been seen,
447
alive and well.
448
"""
687
449
self.last_checked_ok = datetime.datetime.utcnow()
688
self.last_checker_status = 0
689
self.last_checker_signal = None
690
self.bump_timeout()
691
692
def bump_timeout(self, timeout=None):
693
"""Bump up the timeout for this client."""
694
if timeout is None:
695
timeout = self.timeout
696
if self.disable_initiator_tag is not None:
697
gobject.source_remove(self.disable_initiator_tag)
698
self.disable_initiator_tag = None
699
if getattr(self, "enabled", False):
700
self.disable_initiator_tag = gobject.timeout_add(
701
int(timeout.total_seconds() * 1000), self.disable)
702
self.expires = datetime.datetime.utcnow() + timeout
450
gobject.source_remove(self.disable_initiator_tag)
451
self.disable_initiator_tag = (gobject.timeout_add
452
(self.timeout_milliseconds(),
453
self.disable))
703
454
704
455
def need_approval(self):
705
456
self.last_approval_request = datetime.datetime.utcnow()
710
461
If a checker already exists, leave it running and do
711
462
nothing."""
712
463
# The reason for not killing a running checker is that if we
713
# did that, and if a checker (for some reason) started running
714
# slowly and taking more than 'interval' time, then the client
715
# would inevitably timeout, since no checker would get a
716
# chance to run to completion. If we instead leave running
464
# did that, then if a checker (for some reason) started
465
# running slowly and taking more than 'interval' time, the
466
# client would inevitably timeout, since no checker would get
467
# a chance to run to completion. If we instead leave running
717
468
# checkers alone, the checker would have to take more time
718
469
# than 'timeout' for the client to be disabled, which is as it
719
470
# should be.
720
471
721
if self.checker is not None and not self.checker.is_alive():
722
logger.warning("Checker was not alive; joining")
723
self.checker.join()
724
self.checker = None
472
# If a checker exists, make sure it is not a zombie
473
try:
474
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
475
except (AttributeError, OSError) as error:
476
if (isinstance(error, OSError)
477
and error.errno != errno.ECHILD):
478
raise error
479
else:
480
if pid:
481
logger.warning("Checker was a zombie")
482
gobject.source_remove(self.checker_callback_tag)
483
self.checker_callback(pid, status,
484
self.current_checker_command)
725
485
# Start a new checker if needed
726
486
if self.checker is None:
727
# Escape attributes for the shell
728
escaped_attrs = {
729
attr: re.escape(str(getattr(self, attr)))
730
for attr in self.runtime_expansions }
731
487
try:
732
command = self.checker_command % escaped_attrs
733
except TypeError as error:
734
logger.error('Could not format string "%s"',
735
self.checker_command,
736
exc_info=error)
737
return True # Try again later
488
# In case checker_command has exactly one % operator
489
command = self.checker_command % self.host
490
except TypeError:
491
# Escape attributes for the shell
492
escaped_attrs = dict(
493
(attr,
494
re.escape(unicode(str(getattr(self, attr, "")),
495
errors=
496
'replace')))
497
for attr in
498
self.runtime_expansions)
499
500
try:
501
command = self.checker_command % escaped_attrs
502
except TypeError as error:
503
logger.error('Could not format string "%s":'
504
' %s', self.checker_command, error)
505
return True # Try again later
738
506
self.current_checker_command = command
739
logger.info("Starting checker %r for %s", command,
740
self.name)
741
# We don't need to redirect stdout and stderr, since
742
# in normal mode, that is already done by daemon(),
743
# and in debug mode we don't want to. (Stdin is
744
# always replaced by /dev/null.)
745
# The exception is when not debugging but nevertheless
746
# running in the foreground; use the previously
747
# created wnull.
748
popen_args = { "close_fds": True,
749
"shell": True,
750
"cwd": "/" }
751
if (not self.server_settings["debug"]
752
and self.server_settings["foreground"]):
753
popen_args.update({"stdout": wnull,
754
"stderr": wnull })
755
pipe = multiprocessing.Pipe(duplex = False)
756
self.checker = multiprocessing.Process(
757
target = call_pipe,
758
args = (pipe[1], subprocess.call, command),
759
kwargs = popen_args)
760
self.checker.start()
761
self.checker_callback_tag = gobject.io_add_watch(
762
pipe[0].fileno(), gobject.IO_IN,
763
self.checker_callback, pipe[0], command)
507
try:
508
logger.info("Starting checker %r for %s",
509
command, self.name)
510
# We don't need to redirect stdout and stderr, since
511
# in normal mode, that is already done by daemon(),
512
# and in debug mode we don't want to. (Stdin is
513
# always replaced by /dev/null.)
514
self.checker = subprocess.Popen(command,
515
close_fds=True,
516
shell=True, cwd="/")
517
self.checker_callback_tag = (gobject.child_watch_add
518
(self.checker.pid,
519
self.checker_callback,
520
data=command))
521
# The checker may have completed before the gobject
522
# watch was added. Check for this.
523
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
524
if pid:
525
gobject.source_remove(self.checker_callback_tag)
526
self.checker_callback(pid, status, command)
527
except OSError as error:
528
logger.error("Failed to start subprocess: %s",
529
error)
764
530
# Re-run this periodically if run by gobject.timeout_add
765
531
return True
766
532
772
538
if getattr(self, "checker", None) is None:
773
539
return
774
540
logger.debug("Stopping checker for %(name)s", vars(self))
775
self.checker.terminate()
541
try:
542
os.kill(self.checker.pid, signal.SIGTERM)
543
#time.sleep(0.5)
544
#if self.checker.poll() is None:
545
# os.kill(self.checker.pid, signal.SIGKILL)
546
except OSError as error:
547
if error.errno != errno.ESRCH: # No such process
548
raise
776
549
self.checker = None
777
550
778
779
def dbus_service_property(dbus_interface,
780
signature="v",
781
access="readwrite",
782
byte_arrays=False):
551
def dbus_service_property(dbus_interface, signature="v",
552
access="readwrite", byte_arrays=False):
783
553
"""Decorators for marking methods of a DBusObjectWithProperties to
784
554
become properties on the D-Bus.
785
555
794
564
# "Set" method, so we fail early here:
795
565
if byte_arrays and signature != "ay":
796
566
raise ValueError("Byte arrays not supported for non-'ay'"
797
" signature {!r}".format(signature))
798
567
" signature %r" % signature)
799
568
def decorator(func):
800
569
func._dbus_is_property = True
801
570
func._dbus_interface = dbus_interface
806
575
func._dbus_name = func._dbus_name[:-14]
807
576
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
808
577
return func
809
810
return decorator
811
812
813
def dbus_interface_annotations(dbus_interface):
814
"""Decorator for marking functions returning interface annotations
815
816
Usage:
817
818
@dbus_interface_annotations("org.example.Interface")
819
def _foo(self): # Function name does not matter
820
return {"org.freedesktop.DBus.Deprecated": "true",
821
"org.freedesktop.DBus.Property.EmitsChangedSignal":
822
"false"}
823
"""
824
825
def decorator(func):
826
func._dbus_is_interface = True
827
func._dbus_interface = dbus_interface
828
func._dbus_name = dbus_interface
829
return func
830
831
return decorator
832
833
834
def dbus_annotations(annotations):
835
"""Decorator to annotate D-Bus methods, signals or properties
836
Usage:
837
838
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
839
"org.freedesktop.DBus.Property."
840
"EmitsChangedSignal": "false"})
841
@dbus_service_property("org.example.Interface", signature="b",
842
access="r")
843
def Property_dbus_property(self):
844
return dbus.Boolean(False)
845
846
See also the DBusObjectWithAnnotations class.
847
"""
848
849
def decorator(func):
850
func._dbus_annotations = annotations
851
return func
852
853
578
return decorator
854
579
855
580
856
581
class DBusPropertyException(dbus.exceptions.DBusException):
857
582
"""A base class for D-Bus property-related exceptions
858
583
"""
859
pass
584
def __unicode__(self):
585
return unicode(str(self))
860
586
861
587
862
588
class DBusPropertyAccessException(DBusPropertyException):
871
597
pass
872
598
873
599
874
class DBusObjectWithAnnotations(dbus.service.Object):
875
"""A D-Bus object with annotations.
876
877
Classes inheriting from this can use the dbus_annotations
878
decorator to add annotations to methods or signals.
879
"""
880
881
@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)
890
891
def _get_all_dbus_things(self, thing):
892
"""Returns a generator of (name, attribute) pairs
893
"""
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)))
899
900
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
901
out_signature = "s",
902
path_keyword = 'object_path',
903
connection_keyword = 'connection')
904
def Introspect(self, object_path, connection):
905
"""Overloading of standard D-Bus method.
906
907
Inserts annotation tags on methods and signals.
908
"""
909
xmlstring = dbus.service.Object.Introspect(self, object_path,
910
connection)
911
try:
912
document = xml.dom.minidom.parseString(xmlstring)
913
914
for if_tag in document.getElementsByTagName("interface"):
915
# Add annotation tags
916
for typ in ("method", "signal"):
917
for tag in if_tag.getElementsByTagName(typ):
918
annots = dict()
919
for name, prop in (self.
920
_get_all_dbus_things(typ)):
921
if (name == tag.getAttribute("name")
922
and prop._dbus_interface
923
== if_tag.getAttribute("name")):
924
annots.update(getattr(
925
prop, "_dbus_annotations", {}))
926
for name, value in annots.items():
927
ann_tag = document.createElement(
928
"annotation")
929
ann_tag.setAttribute("name", name)
930
ann_tag.setAttribute("value", value)
931
tag.appendChild(ann_tag)
932
# Add interface annotation tags
933
for annotation, value in dict(
934
itertools.chain.from_iterable(
935
annotations().items()
936
for name, annotations
937
in self._get_all_dbus_things("interface")
938
if name == if_tag.getAttribute("name")
939
)).items():
940
ann_tag = document.createElement("annotation")
941
ann_tag.setAttribute("name", annotation)
942
ann_tag.setAttribute("value", value)
943
if_tag.appendChild(ann_tag)
944
# Fix argument name for the Introspect method itself
945
if (if_tag.getAttribute("name")
946
== dbus.INTROSPECTABLE_IFACE):
947
for cn in if_tag.getElementsByTagName("method"):
948
if cn.getAttribute("name") == "Introspect":
949
for arg in cn.getElementsByTagName("arg"):
950
if (arg.getAttribute("direction")
951
== "out"):
952
arg.setAttribute("name",
953
"xml_data")
954
xmlstring = document.toxml("utf-8")
955
document.unlink()
956
except (AttributeError, xml.dom.DOMException,
957
xml.parsers.expat.ExpatError) as error:
958
logger.error("Failed to override Introspection method",
959
exc_info=error)
960
return xmlstring
961
962
963
class DBusObjectWithProperties(DBusObjectWithAnnotations):
600
class DBusObjectWithProperties(dbus.service.Object):
964
601
"""A D-Bus object with properties.
965
602
966
603
Classes inheriting from this can use the dbus_service_property
967
604
decorator to expose methods as D-Bus properties. It exposes the
968
605
standard Get(), Set(), and GetAll() methods on the D-Bus.
969
606
"""
970
607
608
@staticmethod
609
def _is_dbus_property(obj):
610
return getattr(obj, "_dbus_is_property", False)
611
612
def _get_all_dbus_properties(self):
613
"""Returns a generator of (name, attribute) pairs
614
"""
615
return ((prop._dbus_name, prop)
616
for name, prop in
617
inspect.getmembers(self, self._is_dbus_property))
618
971
619
def _get_dbus_property(self, interface_name, property_name):
972
620
"""Returns a bound method if one exists which is a D-Bus
973
621
property with the specified name and interface.
974
622
"""
975
for cls in self.__class__.__mro__:
976
for name, value in inspect.getmembers(
977
cls, self._is_dbus_thing("property")):
978
if (value._dbus_name == property_name
979
and value._dbus_interface == interface_name):
980
return value.__get__(self)
981
623
for name in (property_name,
624
property_name + "_dbus_property"):
625
prop = getattr(self, name, None)
626
if (prop is None
627
or not self._is_dbus_property(prop)
628
or prop._dbus_name != property_name
629
or (interface_name and prop._dbus_interface
630
and interface_name != prop._dbus_interface)):
631
continue
632
return prop
982
633
# No such property
983
raise DBusPropertyNotFound("{}:{}.{}".format(
984
self.dbus_object_path, interface_name, property_name))
985
986
@classmethod
987
def _get_all_interface_names(cls):
988
"""Get a sequence of all interfaces supported by an object"""
989
return (name for name in set(getattr(getattr(x, attr),
990
"_dbus_interface", None)
991
for x in (inspect.getmro(cls))
992
for attr in dir(x))
993
if name is not None)
994
995
@dbus.service.method(dbus.PROPERTIES_IFACE,
996
in_signature="ss",
634
raise DBusPropertyNotFound(self.dbus_object_path + ":"
635
+ interface_name + "."
636
+ property_name)
637
638
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
997
639
out_signature="v")
998
640
def Get(self, interface_name, property_name):
999
641
"""Standard D-Bus property Get() method, see D-Bus standard.
1017
659
# The byte_arrays option is not supported yet on
1018
660
# signatures other than "ay".
1019
661
if prop._dbus_signature != "ay":
1020
raise ValueError("Byte arrays not supported for non-"
1021
"'ay' signature {!r}"
1022
.format(prop._dbus_signature))
1023
value = dbus.ByteArray(b''.join(chr(byte)
1024
for byte in value))
662
raise ValueError
663
value = dbus.ByteArray(''.join(unichr(byte)
664
for byte in value))
1025
665
prop(value)
1026
666
1027
@dbus.service.method(dbus.PROPERTIES_IFACE,
1028
in_signature="s",
667
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
1029
668
out_signature="a{sv}")
1030
669
def GetAll(self, interface_name):
1031
670
"""Standard D-Bus property GetAll() method, see D-Bus
1032
671
standard.
1033
672
1034
673
Note: Will not include properties with access="write".
1035
674
"""
1036
properties = {}
1037
for name, prop in self._get_all_dbus_things("property"):
675
all = {}
676
for name, prop in self._get_all_dbus_properties():
1038
677
if (interface_name
1039
678
and interface_name != prop._dbus_interface):
1040
679
# Interface non-empty but did not match
1044
683
continue
1045
684
value = prop()
1046
685
if not hasattr(value, "variant_level"):
1047
properties[name] = value
686
all[name] = value
1048
687
continue
1049
properties[name] = type(value)(
1050
value, variant_level = value.variant_level + 1)
1051
return dbus.Dictionary(properties, signature="sv")
1052
1053
@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
1054
def PropertiesChanged(self, interface_name, changed_properties,
1055
invalidated_properties):
1056
"""Standard D-Bus PropertiesChanged() signal, see D-Bus
1057
standard.
1058
"""
1059
pass
688
all[name] = type(value)(value, variant_level=
689
value.variant_level+1)
690
return dbus.Dictionary(all, signature="sv")
1060
691
1061
692
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1062
693
out_signature="s",
1063
694
path_keyword='object_path',
1064
695
connection_keyword='connection')
1065
696
def Introspect(self, object_path, connection):
1066
"""Overloading of standard D-Bus method.
1067
1068
Inserts property tags and interface annotation tags.
697
"""Standard D-Bus method, overloaded to insert property tags.
1069
698
"""
1070
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1071
object_path,
1072
connection)
699
xmlstring = dbus.service.Object.Introspect(self, object_path,
700
connection)
1073
701
try:
1074
702
document = xml.dom.minidom.parseString(xmlstring)
1075
1076
703
def make_tag(document, name, prop):
1077
704
e = document.createElement("property")
1078
705
e.setAttribute("name", name)
1079
706
e.setAttribute("type", prop._dbus_signature)
1080
707
e.setAttribute("access", prop._dbus_access)
1081
708
return e
1082
1083
709
for if_tag in document.getElementsByTagName("interface"):
1084
# Add property tags
1085
710
for tag in (make_tag(document, name, prop)
1086
711
for name, prop
1087
in self._get_all_dbus_things("property")
712
in self._get_all_dbus_properties()
1088
713
if prop._dbus_interface
1089
714
== if_tag.getAttribute("name")):
1090
715
if_tag.appendChild(tag)
1091
# Add annotation tags for properties
1092
for tag in if_tag.getElementsByTagName("property"):
1093
annots = dict()
1094
for name, prop in self._get_all_dbus_things(
1095
"property"):
1096
if (name == tag.getAttribute("name")
1097
and prop._dbus_interface
1098
== if_tag.getAttribute("name")):
1099
annots.update(getattr(
1100
prop, "_dbus_annotations", {}))
1101
for name, value in annots.items():
1102
ann_tag = document.createElement(
1103
"annotation")
1104
ann_tag.setAttribute("name", name)
1105
ann_tag.setAttribute("value", value)
1106
tag.appendChild(ann_tag)
1107
716
# Add the names to the return values for the
1108
717
# "org.freedesktop.DBus.Properties" methods
1109
718
if (if_tag.getAttribute("name")
1124
733
except (AttributeError, xml.dom.DOMException,
1125
734
xml.parsers.expat.ExpatError) as error:
1126
735
logger.error("Failed to override Introspection method",
1127
exc_info=error)
1128
return xmlstring
1129
1130
try:
1131
dbus.OBJECT_MANAGER_IFACE
1132
except AttributeError:
1133
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1134
1135
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1136
"""A D-Bus object with an ObjectManager.
1137
1138
Classes inheriting from this exposes the standard
1139
GetManagedObjects call and the InterfacesAdded and
1140
InterfacesRemoved signals on the standard
1141
"org.freedesktop.DBus.ObjectManager" interface.
1142
1143
Note: No signals are sent automatically; they must be sent
1144
manually.
1145
"""
1146
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1147
out_signature = "a{oa{sa{sv}}}")
1148
def GetManagedObjects(self):
1149
"""This function must be overridden"""
1150
raise NotImplementedError()
1151
1152
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1153
signature = "oa{sa{sv}}")
1154
def InterfacesAdded(self, object_path, interfaces_and_properties):
1155
pass
1156
1157
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature = "oas")
1158
def InterfacesRemoved(self, object_path, interfaces):
1159
pass
1160
1161
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1162
out_signature = "s",
1163
path_keyword = 'object_path',
1164
connection_keyword = 'connection')
1165
def Introspect(self, object_path, connection):
1166
"""Overloading of standard D-Bus method.
1167
1168
Override return argument name of GetManagedObjects to be
1169
"objpath_interfaces_and_properties"
1170
"""
1171
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1172
object_path,
1173
connection)
1174
try:
1175
document = xml.dom.minidom.parseString(xmlstring)
1176
1177
for if_tag in document.getElementsByTagName("interface"):
1178
# Fix argument name for the GetManagedObjects method
1179
if (if_tag.getAttribute("name")
1180
== dbus.OBJECT_MANAGER_IFACE):
1181
for cn in if_tag.getElementsByTagName("method"):
1182
if (cn.getAttribute("name")
1183
== "GetManagedObjects"):
1184
for arg in cn.getElementsByTagName("arg"):
1185
if (arg.getAttribute("direction")
1186
== "out"):
1187
arg.setAttribute(
1188
"name",
1189
"objpath_interfaces"
1190
"_and_properties")
1191
xmlstring = document.toxml("utf-8")
1192
document.unlink()
1193
except (AttributeError, xml.dom.DOMException,
1194
xml.parsers.expat.ExpatError) as error:
1195
logger.error("Failed to override Introspection method",
1196
exc_info = error)
1197
return xmlstring
1198
1199
def datetime_to_dbus(dt, variant_level=0):
1200
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1201
if dt is None:
1202
return dbus.String("", variant_level = variant_level)
1203
return dbus.String(dt.isoformat(), variant_level=variant_level)
1204
1205
1206
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1207
"""A class decorator; applied to a subclass of
1208
dbus.service.Object, it will add alternate D-Bus attributes with
1209
interface names according to the "alt_interface_names" mapping.
1210
Usage:
1211
1212
@alternate_dbus_interfaces({"org.example.Interface":
1213
"net.example.AlternateInterface"})
1214
class SampleDBusObject(dbus.service.Object):
1215
@dbus.service.method("org.example.Interface")
1216
def SampleDBusMethod():
1217
pass
1218
1219
The above "SampleDBusMethod" on "SampleDBusObject" will be
1220
reachable via two interfaces: "org.example.Interface" and
1221
"net.example.AlternateInterface", the latter of which will have
1222
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1223
"true", unless "deprecate" is passed with a False value.
1224
1225
This works for methods and signals, and also for D-Bus properties
1226
(from DBusObjectWithProperties) and interfaces (from the
1227
dbus_interface_annotations decorator).
1228
"""
1229
1230
def wrapper(cls):
1231
for orig_interface_name, alt_interface_name in (
1232
alt_interface_names.items()):
1233
attr = {}
1234
interface_names = set()
1235
# Go though all attributes of the class
1236
for attrname, attribute in inspect.getmembers(cls):
1237
# Ignore non-D-Bus attributes, and D-Bus attributes
1238
# with the wrong interface name
1239
if (not hasattr(attribute, "_dbus_interface")
1240
or not attribute._dbus_interface.startswith(
1241
orig_interface_name)):
1242
continue
1243
# Create an alternate D-Bus interface name based on
1244
# the current name
1245
alt_interface = attribute._dbus_interface.replace(
1246
orig_interface_name, alt_interface_name)
1247
interface_names.add(alt_interface)
1248
# Is this a D-Bus signal?
1249
if getattr(attribute, "_dbus_is_signal", False):
1250
if sys.version_info.major == 2:
1251
# Extract the original non-method undecorated
1252
# function by black magic
1253
nonmethod_func = (dict(
1254
zip(attribute.func_code.co_freevars,
1255
attribute.__closure__))
1256
["func"].cell_contents)
1257
else:
1258
nonmethod_func = attribute
1259
# Create a new, but exactly alike, function
1260
# object, and decorate it to be a new D-Bus signal
1261
# with the alternate D-Bus interface name
1262
if sys.version_info.major == 2:
1263
new_function = types.FunctionType(
1264
nonmethod_func.func_code,
1265
nonmethod_func.func_globals,
1266
nonmethod_func.func_name,
1267
nonmethod_func.func_defaults,
1268
nonmethod_func.func_closure)
1269
else:
1270
new_function = types.FunctionType(
1271
nonmethod_func.__code__,
1272
nonmethod_func.__globals__,
1273
nonmethod_func.__name__,
1274
nonmethod_func.__defaults__,
1275
nonmethod_func.__closure__)
1276
new_function = (dbus.service.signal(
1277
alt_interface,
1278
attribute._dbus_signature)(new_function))
1279
# Copy annotations, if any
1280
try:
1281
new_function._dbus_annotations = dict(
1282
attribute._dbus_annotations)
1283
except AttributeError:
1284
pass
1285
# Define a creator of a function to call both the
1286
# original and alternate functions, so both the
1287
# original and alternate signals gets sent when
1288
# the function is called
1289
def fixscope(func1, func2):
1290
"""This function is a scope container to pass
1291
func1 and func2 to the "call_both" function
1292
outside of its arguments"""
1293
1294
@functools.wraps(func2)
1295
def call_both(*args, **kwargs):
1296
"""This function will emit two D-Bus
1297
signals by calling func1 and func2"""
1298
func1(*args, **kwargs)
1299
func2(*args, **kwargs)
1300
# Make wrapper function look like a D-Bus signal
1301
for name, attr in inspect.getmembers(func2):
1302
if name.startswith("_dbus_"):
1303
setattr(call_both, name, attr)
1304
1305
return call_both
1306
# Create the "call_both" function and add it to
1307
# the class
1308
attr[attrname] = fixscope(attribute, new_function)
1309
# Is this a D-Bus method?
1310
elif getattr(attribute, "_dbus_is_method", False):
1311
# Create a new, but exactly alike, function
1312
# object. Decorate it to be a new D-Bus method
1313
# with the alternate D-Bus interface name. Add it
1314
# to the class.
1315
attr[attrname] = (
1316
dbus.service.method(
1317
alt_interface,
1318
attribute._dbus_in_signature,
1319
attribute._dbus_out_signature)
1320
(types.FunctionType(attribute.func_code,
1321
attribute.func_globals,
1322
attribute.func_name,
1323
attribute.func_defaults,
1324
attribute.func_closure)))
1325
# Copy annotations, if any
1326
try:
1327
attr[attrname]._dbus_annotations = dict(
1328
attribute._dbus_annotations)
1329
except AttributeError:
1330
pass
1331
# Is this a D-Bus property?
1332
elif getattr(attribute, "_dbus_is_property", False):
1333
# Create a new, but exactly alike, function
1334
# object, and decorate it to be a new D-Bus
1335
# property with the alternate D-Bus interface
1336
# name. Add it to the class.
1337
attr[attrname] = (dbus_service_property(
1338
alt_interface, attribute._dbus_signature,
1339
attribute._dbus_access,
1340
attribute._dbus_get_args_options
1341
["byte_arrays"])
1342
(types.FunctionType(
1343
attribute.func_code,
1344
attribute.func_globals,
1345
attribute.func_name,
1346
attribute.func_defaults,
1347
attribute.func_closure)))
1348
# Copy annotations, if any
1349
try:
1350
attr[attrname]._dbus_annotations = dict(
1351
attribute._dbus_annotations)
1352
except AttributeError:
1353
pass
1354
# Is this a D-Bus interface?
1355
elif getattr(attribute, "_dbus_is_interface", False):
1356
# Create a new, but exactly alike, function
1357
# object. Decorate it to be a new D-Bus interface
1358
# with the alternate D-Bus interface name. Add it
1359
# to the class.
1360
attr[attrname] = (
1361
dbus_interface_annotations(alt_interface)
1362
(types.FunctionType(attribute.func_code,
1363
attribute.func_globals,
1364
attribute.func_name,
1365
attribute.func_defaults,
1366
attribute.func_closure)))
1367
if deprecate:
1368
# Deprecate all alternate interfaces
1369
iname="_AlternateDBusNames_interface_annotation{}"
1370
for interface_name in interface_names:
1371
1372
@dbus_interface_annotations(interface_name)
1373
def func(self):
1374
return { "org.freedesktop.DBus.Deprecated":
1375
"true" }
1376
# Find an unused name
1377
for aname in (iname.format(i)
1378
for i in itertools.count()):
1379
if aname not in attr:
1380
attr[aname] = func
1381
break
1382
if interface_names:
1383
# Replace the class with a new subclass of it with
1384
# methods, signals, etc. as created above.
1385
cls = type(b"{}Alternate".format(cls.__name__),
1386
(cls, ), attr)
1387
return cls
1388
1389
return wrapper
1390
1391
1392
@alternate_dbus_interfaces({"se.recompile.Mandos":
1393
"se.bsnet.fukt.Mandos"})
736
error)
737
return xmlstring
738
739
1394
740
class ClientDBus(Client, DBusObjectWithProperties):
1395
741
"""A Client class using D-Bus
1396
742
1400
746
"""
1401
747
1402
748
runtime_expansions = (Client.runtime_expansions
1403
+ ("dbus_object_path", ))
1404
1405
_interface = "se.recompile.Mandos.Client"
749
+ ("dbus_object_path",))
1406
750
1407
751
# dbus.service.Object doesn't use super(), so we can't either.
1408
752
1409
753
def __init__(self, bus = None, *args, **kwargs):
754
self._approvals_pending = 0
1410
755
self.bus = bus
1411
756
Client.__init__(self, *args, **kwargs)
1412
757
# Only now, when this client is initialized, can it show up on
1413
758
# the D-Bus
1414
client_object_name = str(self.name).translate(
759
client_object_name = unicode(self.name).translate(
1415
760
{ord("."): ord("_"),
1416
761
ord("-"): ord("_")})
1417
self.dbus_object_path = dbus.ObjectPath(
1418
"/clients/" + client_object_name)
762
self.dbus_object_path = (dbus.ObjectPath
763
("/clients/" + client_object_name))
1419
764
DBusObjectWithProperties.__init__(self, self.bus,
1420
765
self.dbus_object_path)
1421
1422
def notifychangeproperty(transform_func, dbus_name,
1423
type_func=lambda x: x,
1424
variant_level=1,
1425
invalidate_only=False,
1426
_interface=_interface):
1427
""" Modify a variable so that it's a property which announces
1428
its changes to DBus.
1429
1430
transform_fun: Function that takes a value and a variant_level
1431
and transforms it to a D-Bus type.
1432
dbus_name: D-Bus name of the variable
1433
type_func: Function that transform the value before sending it
1434
to the D-Bus. Default: no transform
1435
variant_level: D-Bus variant level. Default: 1
1436
"""
1437
attrname = "_{}".format(dbus_name)
1438
1439
def setter(self, value):
1440
if hasattr(self, "dbus_object_path"):
1441
if (not hasattr(self, attrname) or
1442
type_func(getattr(self, attrname, None))
1443
!= type_func(value)):
1444
if invalidate_only:
1445
self.PropertiesChanged(
1446
_interface, dbus.Dictionary(),
1447
dbus.Array((dbus_name, )))
1448
else:
1449
dbus_value = transform_func(
1450
type_func(value),
1451
variant_level = variant_level)
1452
self.PropertyChanged(dbus.String(dbus_name),
1453
dbus_value)
1454
self.PropertiesChanged(
1455
_interface,
1456
dbus.Dictionary({ dbus.String(dbus_name):
1457
dbus_value }),
1458
dbus.Array())
1459
setattr(self, attrname, value)
1460
1461
return property(lambda self: getattr(self, attrname), setter)
1462
1463
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1464
approvals_pending = notifychangeproperty(dbus.Boolean,
1465
"ApprovalPending",
1466
type_func = bool)
1467
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1468
last_enabled = notifychangeproperty(datetime_to_dbus,
1469
"LastEnabled")
1470
checker = notifychangeproperty(
1471
dbus.Boolean, "CheckerRunning",
1472
type_func = lambda checker: checker is not None)
1473
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1474
"LastCheckedOK")
1475
last_checker_status = notifychangeproperty(dbus.Int16,
1476
"LastCheckerStatus")
1477
last_approval_request = notifychangeproperty(
1478
datetime_to_dbus, "LastApprovalRequest")
1479
approved_by_default = notifychangeproperty(dbus.Boolean,
1480
"ApprovedByDefault")
1481
approval_delay = notifychangeproperty(
1482
dbus.UInt64, "ApprovalDelay",
1483
type_func = lambda td: td.total_seconds() * 1000)
1484
approval_duration = notifychangeproperty(
1485
dbus.UInt64, "ApprovalDuration",
1486
type_func = lambda td: td.total_seconds() * 1000)
1487
host = notifychangeproperty(dbus.String, "Host")
1488
timeout = notifychangeproperty(
1489
dbus.UInt64, "Timeout",
1490
type_func = lambda td: td.total_seconds() * 1000)
1491
extended_timeout = notifychangeproperty(
1492
dbus.UInt64, "ExtendedTimeout",
1493
type_func = lambda td: td.total_seconds() * 1000)
1494
interval = notifychangeproperty(
1495
dbus.UInt64, "Interval",
1496
type_func = lambda td: td.total_seconds() * 1000)
1497
checker_command = notifychangeproperty(dbus.String, "Checker")
1498
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1499
invalidate_only=True)
1500
1501
del notifychangeproperty
766
767
def _get_approvals_pending(self):
768
return self._approvals_pending
769
def _set_approvals_pending(self, value):
770
old_value = self._approvals_pending
771
self._approvals_pending = value
772
bval = bool(value)
773
if (hasattr(self, "dbus_object_path")
774
and bval is not bool(old_value)):
775
dbus_bool = dbus.Boolean(bval, variant_level=1)
776
self.PropertyChanged(dbus.String("ApprovalPending"),
777
dbus_bool)
778
779
approvals_pending = property(_get_approvals_pending,
780
_set_approvals_pending)
781
del _get_approvals_pending, _set_approvals_pending
782
783
@staticmethod
784
def _datetime_to_dbus(dt, variant_level=0):
785
"""Convert a UTC datetime.datetime() to a D-Bus type."""
786
return dbus.String(dt.isoformat(),
787
variant_level=variant_level)
788
789
def enable(self):
790
oldstate = getattr(self, "enabled", False)
791
r = Client.enable(self)
792
if oldstate != self.enabled:
793
# Emit D-Bus signals
794
self.PropertyChanged(dbus.String("Enabled"),
795
dbus.Boolean(True, variant_level=1))
796
self.PropertyChanged(
797
dbus.String("LastEnabled"),
798
self._datetime_to_dbus(self.last_enabled,
799
variant_level=1))
800
return r
801
802
def disable(self, quiet = False):
803
oldstate = getattr(self, "enabled", False)
804
r = Client.disable(self, quiet=quiet)
805
if not quiet and oldstate != self.enabled:
806
# Emit D-Bus signal
807
self.PropertyChanged(dbus.String("Enabled"),
808
dbus.Boolean(False, variant_level=1))
809
return r
1502
810
1503
811
def __del__(self, *args, **kwargs):
1504
812
try:
1509
817
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1510
818
Client.__del__(self, *args, **kwargs)
1511
819
1512
def checker_callback(self, source, condition,
1513
connection, command, *args, **kwargs):
1514
ret = Client.checker_callback(self, source, condition,
1515
connection, command, *args,
1516
**kwargs)
1517
exitstatus = self.last_checker_status
1518
if exitstatus >= 0:
820
def checker_callback(self, pid, condition, command,
821
*args, **kwargs):
822
self.checker_callback_tag = None
823
self.checker = None
824
# Emit D-Bus signal
825
self.PropertyChanged(dbus.String("CheckerRunning"),
826
dbus.Boolean(False, variant_level=1))
827
if os.WIFEXITED(condition):
828
exitstatus = os.WEXITSTATUS(condition)
1519
829
# Emit D-Bus signal
1520
830
self.CheckerCompleted(dbus.Int16(exitstatus),
1521
# This is specific to GNU libC
1522
dbus.Int64(exitstatus << 8),
831
dbus.Int64(condition),
1523
832
dbus.String(command))
1524
833
else:
1525
834
# Emit D-Bus signal
1526
835
self.CheckerCompleted(dbus.Int16(-1),
1527
dbus.Int64(
1528
# This is specific to GNU libC
1529
(exitstatus << 8)
1530
| self.last_checker_signal),
836
dbus.Int64(condition),
1531
837
dbus.String(command))
1532
return ret
838
839
return Client.checker_callback(self, pid, condition, command,
840
*args, **kwargs)
841
842
def checked_ok(self, *args, **kwargs):
843
Client.checked_ok(self, *args, **kwargs)
844
# Emit D-Bus signal
845
self.PropertyChanged(
846
dbus.String("LastCheckedOK"),
847
(self._datetime_to_dbus(self.last_checked_ok,
848
variant_level=1)))
849
850
def need_approval(self, *args, **kwargs):
851
r = Client.need_approval(self, *args, **kwargs)
852
# Emit D-Bus signal
853
self.PropertyChanged(
854
dbus.String("LastApprovalRequest"),
855
(self._datetime_to_dbus(self.last_approval_request,
856
variant_level=1)))
857
return r
1533
858
1534
859
def start_checker(self, *args, **kwargs):
1535
old_checker_pid = getattr(self.checker, "pid", None)
860
old_checker = self.checker
861
if self.checker is not None:
862
old_checker_pid = self.checker.pid
863
else:
864
old_checker_pid = None
1536
865
r = Client.start_checker(self, *args, **kwargs)
1537
866
# Only if new checker process was started
1538
867
if (self.checker is not None
1539
868
and old_checker_pid != self.checker.pid):
1540
869
# Emit D-Bus signal
1541
870
self.CheckerStarted(self.current_checker_command)
871
self.PropertyChanged(
872
dbus.String("CheckerRunning"),
873
dbus.Boolean(True, variant_level=1))
1542
874
return r
1543
875
876
def stop_checker(self, *args, **kwargs):
877
old_checker = getattr(self, "checker", None)
878
r = Client.stop_checker(self, *args, **kwargs)
879
if (old_checker is not None
880
and getattr(self, "checker", None) is None):
881
self.PropertyChanged(dbus.String("CheckerRunning"),
882
dbus.Boolean(False, variant_level=1))
883
return r
884
1544
885
def _reset_approved(self):
1545
self.approved = None
886
self._approved = None
1546
887
return False
1547
888
1548
889
def approve(self, value=True):
1549
self.approved = value
1550
gobject.timeout_add(int(self.approval_duration.total_seconds()
1551
* 1000), self._reset_approved)
1552
890
self.send_changedstate()
891
self._approved = value
892
gobject.timeout_add(self._timedelta_to_milliseconds
893
(self.approval_duration),
894
self._reset_approved)
895
1553
896
1554
897
## D-Bus methods, signals & properties
1555
1556
## Interfaces
898
_interface = "se.bsnet.fukt.Mandos.Client"
1557
899
1558
900
## Signals
1559
901
1570
912
pass
1571
913
1572
914
# PropertyChanged - signal
1573
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1574
915
@dbus.service.signal(_interface, signature="sv")
1575
916
def PropertyChanged(self, property, value):
1576
917
"D-Bus signal"
1610
951
self.checked_ok()
1611
952
1612
953
# Enable - method
1613
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1614
954
@dbus.service.method(_interface)
1615
955
def Enable(self):
1616
956
"D-Bus method"
1617
957
self.enable()
1618
958
1619
959
# StartChecker - method
1620
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1621
960
@dbus.service.method(_interface)
1622
961
def StartChecker(self):
1623
962
"D-Bus method"
1624
963
self.start_checker()
1625
964
1626
965
# Disable - method
1627
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1628
966
@dbus.service.method(_interface)
1629
967
def Disable(self):
1630
968
"D-Bus method"
1631
969
self.disable()
1632
970
1633
971
# StopChecker - method
1634
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1635
972
@dbus.service.method(_interface)
1636
973
def StopChecker(self):
1637
974
self.stop_checker()
1644
981
return dbus.Boolean(bool(self.approvals_pending))
1645
982
1646
983
# ApprovedByDefault - property
1647
@dbus_service_property(_interface,
1648
signature="b",
984
@dbus_service_property(_interface, signature="b",
1649
985
access="readwrite")
1650
986
def ApprovedByDefault_dbus_property(self, value=None):
1651
987
if value is None: # get
1652
988
return dbus.Boolean(self.approved_by_default)
1653
989
self.approved_by_default = bool(value)
990
# Emit D-Bus signal
991
self.PropertyChanged(dbus.String("ApprovedByDefault"),
992
dbus.Boolean(value, variant_level=1))
1654
993
1655
994
# ApprovalDelay - property
1656
@dbus_service_property(_interface,
1657
signature="t",
995
@dbus_service_property(_interface, signature="t",
1658
996
access="readwrite")
1659
997
def ApprovalDelay_dbus_property(self, value=None):
1660
998
if value is None: # get
1661
return dbus.UInt64(self.approval_delay.total_seconds()
1662
* 1000)
999
return dbus.UInt64(self.approval_delay_milliseconds())
1663
1000
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1001
# Emit D-Bus signal
1002
self.PropertyChanged(dbus.String("ApprovalDelay"),
1003
dbus.UInt64(value, variant_level=1))
1664
1004
1665
1005
# ApprovalDuration - property
1666
@dbus_service_property(_interface,
1667
signature="t",
1006
@dbus_service_property(_interface, signature="t",
1668
1007
access="readwrite")
1669
1008
def ApprovalDuration_dbus_property(self, value=None):
1670
1009
if value is None: # get
1671
return dbus.UInt64(self.approval_duration.total_seconds()
1672
* 1000)
1010
return dbus.UInt64(self._timedelta_to_milliseconds(
1011
self.approval_duration))
1673
1012
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1013
# Emit D-Bus signal
1014
self.PropertyChanged(dbus.String("ApprovalDuration"),
1015
dbus.UInt64(value, variant_level=1))
1674
1016
1675
1017
# Name - property
1676
@dbus_annotations(
1677
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1678
1018
@dbus_service_property(_interface, signature="s", access="read")
1679
1019
def Name_dbus_property(self):
1680
1020
return dbus.String(self.name)
1681
1021
1682
1022
# Fingerprint - property
1683
@dbus_annotations(
1684
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1685
1023
@dbus_service_property(_interface, signature="s", access="read")
1686
1024
def Fingerprint_dbus_property(self):
1687
1025
return dbus.String(self.fingerprint)
1688
1026
1689
1027
# Host - property
1690
@dbus_service_property(_interface,
1691
signature="s",
1028
@dbus_service_property(_interface, signature="s",
1692
1029
access="readwrite")
1693
1030
def Host_dbus_property(self, value=None):
1694
1031
if value is None: # get
1695
1032
return dbus.String(self.host)
1696
self.host = str(value)
1033
self.host = value
1034
# Emit D-Bus signal
1035
self.PropertyChanged(dbus.String("Host"),
1036
dbus.String(value, variant_level=1))
1697
1037
1698
1038
# Created - property
1699
@dbus_annotations(
1700
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1701
1039
@dbus_service_property(_interface, signature="s", access="read")
1702
1040
def Created_dbus_property(self):
1703
return datetime_to_dbus(self.created)
1041
return dbus.String(self._datetime_to_dbus(self.created))
1704
1042
1705
1043
# LastEnabled - property
1706
1044
@dbus_service_property(_interface, signature="s", access="read")
1707
1045
def LastEnabled_dbus_property(self):
1708
return datetime_to_dbus(self.last_enabled)
1046
if self.last_enabled is None:
1047
return dbus.String("")
1048
return dbus.String(self._datetime_to_dbus(self.last_enabled))
1709
1049
1710
1050
# Enabled - property
1711
@dbus_service_property(_interface,
1712
signature="b",
1051
@dbus_service_property(_interface, signature="b",
1713
1052
access="readwrite")
1714
1053
def Enabled_dbus_property(self, value=None):
1715
1054
if value is None: # get
1720
1059
self.disable()
1721
1060
1722
1061
# LastCheckedOK - property
1723
@dbus_service_property(_interface,
1724
signature="s",
1062
@dbus_service_property(_interface, signature="s",
1725
1063
access="readwrite")
1726
1064
def LastCheckedOK_dbus_property(self, value=None):
1727
1065
if value is not None:
1728
1066
self.checked_ok()
1729
1067
return
1730
return datetime_to_dbus(self.last_checked_ok)
1731
1732
# LastCheckerStatus - property
1733
@dbus_service_property(_interface, signature="n", access="read")
1734
def LastCheckerStatus_dbus_property(self):
1735
return dbus.Int16(self.last_checker_status)
1736
1737
# Expires - property
1738
@dbus_service_property(_interface, signature="s", access="read")
1739
def Expires_dbus_property(self):
1740
return datetime_to_dbus(self.expires)
1068
if self.last_checked_ok is None:
1069
return dbus.String("")
1070
return dbus.String(self._datetime_to_dbus(self
1071
.last_checked_ok))
1741
1072
1742
1073
# LastApprovalRequest - property
1743
1074
@dbus_service_property(_interface, signature="s", access="read")
1744
1075
def LastApprovalRequest_dbus_property(self):
1745
return datetime_to_dbus(self.last_approval_request)
1076
if self.last_approval_request is None:
1077
return dbus.String("")
1078
return dbus.String(self.
1079
_datetime_to_dbus(self
1080
.last_approval_request))
1746
1081
1747
1082
# Timeout - property
1748
@dbus_service_property(_interface,
1749
signature="t",
1083
@dbus_service_property(_interface, signature="t",
1750
1084
access="readwrite")
1751
1085
def Timeout_dbus_property(self, value=None):
1752
1086
if value is None: # get
1753
return dbus.UInt64(self.timeout.total_seconds() * 1000)
1754
old_timeout = self.timeout
1087
return dbus.UInt64(self.timeout_milliseconds())
1755
1088
self.timeout = datetime.timedelta(0, 0, 0, value)
1756
# Reschedule disabling
1757
if self.enabled:
1758
now = datetime.datetime.utcnow()
1759
self.expires += self.timeout - old_timeout
1760
if self.expires <= now:
1761
# The timeout has passed
1762
self.disable()
1763
else:
1764
if (getattr(self, "disable_initiator_tag", None)
1765
is None):
1766
return
1767
gobject.source_remove(self.disable_initiator_tag)
1768
self.disable_initiator_tag = gobject.timeout_add(
1769
int((self.expires - now).total_seconds() * 1000),
1770
self.disable)
1771
1772
# ExtendedTimeout - property
1773
@dbus_service_property(_interface,
1774
signature="t",
1775
access="readwrite")
1776
def ExtendedTimeout_dbus_property(self, value=None):
1777
if value is None: # get
1778
return dbus.UInt64(self.extended_timeout.total_seconds()
1779
* 1000)
1780
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1089
# Emit D-Bus signal
1090
self.PropertyChanged(dbus.String("Timeout"),
1091
dbus.UInt64(value, variant_level=1))
1092
if getattr(self, "disable_initiator_tag", None) is None:
1093
return
1094
# Reschedule timeout
1095
gobject.source_remove(self.disable_initiator_tag)
1096
self.disable_initiator_tag = None
1097
time_to_die = (self.
1098
_timedelta_to_milliseconds((self
1099
.last_checked_ok
1100
+ self.timeout)
1101
- datetime.datetime
1102
.utcnow()))
1103
if time_to_die <= 0:
1104
# The timeout has passed
1105
self.disable()
1106
else:
1107
self.disable_initiator_tag = (gobject.timeout_add
1108
(time_to_die, self.disable))
1781
1109
1782
1110
# Interval - property
1783
@dbus_service_property(_interface,
1784
signature="t",
1111
@dbus_service_property(_interface, signature="t",
1785
1112
access="readwrite")
1786
1113
def Interval_dbus_property(self, value=None):
1787
1114
if value is None: # get
1788
return dbus.UInt64(self.interval.total_seconds() * 1000)
1115
return dbus.UInt64(self.interval_milliseconds())
1789
1116
self.interval = datetime.timedelta(0, 0, 0, value)
1117
# Emit D-Bus signal
1118
self.PropertyChanged(dbus.String("Interval"),
1119
dbus.UInt64(value, variant_level=1))
1790
1120
if getattr(self, "checker_initiator_tag", None) is None:
1791
1121
return
1792
if self.enabled:
1793
# Reschedule checker run
1794
gobject.source_remove(self.checker_initiator_tag)
1795
self.checker_initiator_tag = gobject.timeout_add(
1796
value, self.start_checker)
1797
self.start_checker() # Start one now, too
1798
1122
# Reschedule checker run
1123
gobject.source_remove(self.checker_initiator_tag)
1124
self.checker_initiator_tag = (gobject.timeout_add
1125
(value, self.start_checker))
1126
self.start_checker() # Start one now, too
1127
1799
1128
# Checker - property
1800
@dbus_service_property(_interface,
1801
signature="s",
1129
@dbus_service_property(_interface, signature="s",
1802
1130
access="readwrite")
1803
1131
def Checker_dbus_property(self, value=None):
1804
1132
if value is None: # get
1805
1133
return dbus.String(self.checker_command)
1806
self.checker_command = str(value)
1134
self.checker_command = value
1135
# Emit D-Bus signal
1136
self.PropertyChanged(dbus.String("Checker"),
1137
dbus.String(self.checker_command,
1138
variant_level=1))
1807
1139
1808
1140
# CheckerRunning - property
1809
@dbus_service_property(_interface,
1810
signature="b",
1141
@dbus_service_property(_interface, signature="b",
1811
1142
access="readwrite")
1812
1143
def CheckerRunning_dbus_property(self, value=None):
1813
1144
if value is None: # get
1818
1149
self.stop_checker()
1819
1150
1820
1151
# ObjectPath - property
1821
@dbus_annotations(
1822
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
1823
"org.freedesktop.DBus.Deprecated": "true"})
1824
1152
@dbus_service_property(_interface, signature="o", access="read")
1825
1153
def ObjectPath_dbus_property(self):
1826
1154
return self.dbus_object_path # is already a dbus.ObjectPath
1827
1155
1828
1156
# Secret = property
1829
@dbus_annotations(
1830
{"org.freedesktop.DBus.Property.EmitsChangedSignal":
1831
"invalidates"})
1832
@dbus_service_property(_interface,
1833
signature="ay",
1834
access="write",
1835
byte_arrays=True)
1157
@dbus_service_property(_interface, signature="ay",
1158
access="write", byte_arrays=True)
1836
1159
def Secret_dbus_property(self, value):
1837
self.secret = bytes(value)
1160
self.secret = str(value)
1838
1161
1839
1162
del _interface
1840
1163
1844
1167
self._pipe = child_pipe
1845
1168
self._pipe.send(('init', fpr, address))
1846
1169
if not self._pipe.recv():
1847
raise KeyError(fpr)
1848
1170
raise KeyError()
1171
1849
1172
def __getattribute__(self, name):
1850
if name == '_pipe':
1173
if(name == '_pipe'):
1851
1174
return super(ProxyClient, self).__getattribute__(name)
1852
1175
self._pipe.send(('getattr', name))
1853
1176
data = self._pipe.recv()
1854
1177
if data[0] == 'data':
1855
1178
return data[1]
1856
1179
if data[0] == 'function':
1857
1858
1180
def func(*args, **kwargs):
1859
1181
self._pipe.send(('funcall', name, args, kwargs))
1860
1182
return self._pipe.recv()[1]
1861
1862
1183
return func
1863
1184
1864
1185
def __setattr__(self, name, value):
1865
if name == '_pipe':
1186
if(name == '_pipe'):
1866
1187
return super(ProxyClient, self).__setattr__(name, value)
1867
1188
self._pipe.send(('setattr', name, value))
1868
1189
1876
1197
def handle(self):
1877
1198
with contextlib.closing(self.server.child_pipe) as child_pipe:
1878
1199
logger.info("TCP connection from: %s",
1879
str(self.client_address))
1200
unicode(self.client_address))
1880
1201
logger.debug("Pipe FD: %d",
1881
1202
self.server.child_pipe.fileno())
1882
1883
session = gnutls.connection.ClientSession(
1884
self.request, gnutls.connection .X509Credentials())
1885
1203
1204
session = (gnutls.connection
1205
.ClientSession(self.request,
1206
gnutls.connection
1207
.X509Credentials()))
1208
1886
1209
# Note: gnutls.connection.X509Credentials is really a
1887
1210
# generic GnuTLS certificate credentials object so long as
1888
1211
# no X.509 keys are added to it. Therefore, we can use it
1889
1212
# here despite using OpenPGP certificates.
1890
1213
1891
1214
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1892
1215
# "+AES-256-CBC", "+SHA1",
1893
1216
# "+COMP-NULL", "+CTYPE-OPENPGP",
1896
1219
priority = self.server.gnutls_priority
1897
1220
if priority is None:
1898
1221
priority = "NORMAL"
1899
gnutls.library.functions.gnutls_priority_set_direct(
1900
session._c_object, priority, None)
1901
1222
(gnutls.library.functions
1223
.gnutls_priority_set_direct(session._c_object,
1224
priority, None))
1225
1902
1226
# Start communication using the Mandos protocol
1903
1227
# Get protocol number
1904
1228
line = self.request.makefile().readline()
1905
1229
logger.debug("Protocol version: %r", line)
1906
1230
try:
1907
1231
if int(line.strip().split()[0]) > 1:
1908
raise RuntimeError(line)
1232
raise RuntimeError
1909
1233
except (ValueError, IndexError, RuntimeError) as error:
1910
1234
logger.error("Unknown protocol version: %s", error)
1911
1235
return
1912
1236
1913
1237
# Start GnuTLS connection
1914
1238
try:
1915
1239
session.handshake()
1919
1243
# established. Just abandon the request.
1920
1244
return
1921
1245
logger.debug("Handshake succeeded")
1922
1246
1923
1247
approval_required = False
1924
1248
try:
1925
1249
try:
1926
fpr = self.fingerprint(
1927
self.peer_certificate(session))
1250
fpr = self.fingerprint(self.peer_certificate
1251
(session))
1928
1252
except (TypeError,
1929
1253
gnutls.errors.GNUTLSError) as error:
1930
1254
logger.warning("Bad certificate: %s", error)
1931
1255
return
1932
1256
logger.debug("Fingerprint: %s", fpr)
1933
1257
1934
1258
try:
1935
1259
client = ProxyClient(child_pipe, fpr,
1936
1260
self.client_address)
1945
1269
while True:
1946
1270
if not client.enabled:
1947
1271
logger.info("Client %s is disabled",
1948
client.name)
1272
client.name)
1949
1273
if self.server.use_dbus:
1950
1274
# Emit D-Bus signal
1951
client.Rejected("Disabled")
1275
client.Rejected("Disabled")
1952
1276
return
1953
1277
1954
if client.approved or not client.approval_delay:
1278
if client._approved or not client.approval_delay:
1955
1279
#We are approved or approval is disabled
1956
1280
break
1957
elif client.approved is None:
1281
elif client._approved is None:
1958
1282
logger.info("Client %s needs approval",
1959
1283
client.name)
1960
1284
if self.server.use_dbus:
1961
1285
# Emit D-Bus signal
1962
1286
client.NeedApproval(
1963
client.approval_delay.total_seconds()
1964
* 1000, client.approved_by_default)
1287
client.approval_delay_milliseconds(),
1288
client.approved_by_default)
1965
1289
else:
1966
1290
logger.warning("Client %s was not approved",
1967
1291
client.name)
1971
1295
return
1972
1296
1973
1297
#wait until timeout or approved
1298
#x = float(client._timedelta_to_milliseconds(delay))
1974
1299
time = datetime.datetime.now()
1975
1300
client.changedstate.acquire()
1976
client.changedstate.wait(delay.total_seconds())
1301
client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))
1977
1302
client.changedstate.release()
1978
1303
time2 = datetime.datetime.now()
1979
1304
if (time2 - time) >= delay:
1995
1320
try:
1996
1321
sent = session.send(client.secret[sent_size:])
1997
1322
except gnutls.errors.GNUTLSError as error:
1998
logger.warning("gnutls send failed",
1999
exc_info=error)
1323
logger.warning("gnutls send failed")
2000
1324
return
2001
logger.debug("Sent: %d, remaining: %d", sent,
2002
len(client.secret) - (sent_size
2003
+ sent))
1325
logger.debug("Sent: %d, remaining: %d",
1326
sent, len(client.secret)
1327
- (sent_size + sent))
2004
1328
sent_size += sent
2005
1329
2006
1330
logger.info("Sending secret to %s", client.name)
2007
# bump the timeout using extended_timeout
2008
client.bump_timeout(client.extended_timeout)
1331
# bump the timeout as if seen
1332
client.checked_ok()
2009
1333
if self.server.use_dbus:
2010
1334
# Emit D-Bus signal
2011
1335
client.GotSecret()
2016
1340
try:
2017
1341
session.bye()
2018
1342
except gnutls.errors.GNUTLSError as error:
2019
logger.warning("GnuTLS bye failed",
2020
exc_info=error)
1343
logger.warning("GnuTLS bye failed")
2021
1344
2022
1345
@staticmethod
2023
1346
def peer_certificate(session):
2024
1347
"Return the peer's OpenPGP certificate as a bytestring"
2025
1348
# If not an OpenPGP certificate...
2026
if (gnutls.library.functions.gnutls_certificate_type_get(
2027
session._c_object)
1349
if (gnutls.library.functions
1350
.gnutls_certificate_type_get(session._c_object)
2028
1351
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
2029
1352
# ...do the normal thing
2030
1353
return session.peer_certificate
2044
1367
def fingerprint(openpgp):
2045
1368
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
2046
1369
# New GnuTLS "datum" with the OpenPGP public key
2047
datum = gnutls.library.types.gnutls_datum_t(
2048
ctypes.cast(ctypes.c_char_p(openpgp),
2049
ctypes.POINTER(ctypes.c_ubyte)),
2050
ctypes.c_uint(len(openpgp)))
1370
datum = (gnutls.library.types
1371
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1372
ctypes.POINTER
1373
(ctypes.c_ubyte)),
1374
ctypes.c_uint(len(openpgp))))
2051
1375
# New empty GnuTLS certificate
2052
1376
crt = gnutls.library.types.gnutls_openpgp_crt_t()
2053
gnutls.library.functions.gnutls_openpgp_crt_init(
2054
ctypes.byref(crt))
1377
(gnutls.library.functions
1378
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
2055
1379
# Import the OpenPGP public key into the certificate
2056
gnutls.library.functions.gnutls_openpgp_crt_import(
2057
crt, ctypes.byref(datum),
2058
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
1380
(gnutls.library.functions
1381
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1382
gnutls.library.constants
1383
.GNUTLS_OPENPGP_FMT_RAW))
2059
1384
# Verify the self signature in the key
2060
1385
crtverify = ctypes.c_uint()
2061
gnutls.library.functions.gnutls_openpgp_crt_verify_self(
2062
crt, 0, ctypes.byref(crtverify))
1386
(gnutls.library.functions
1387
.gnutls_openpgp_crt_verify_self(crt, 0,
1388
ctypes.byref(crtverify)))
2063
1389
if crtverify.value != 0:
2064
1390
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2065
raise gnutls.errors.CertificateSecurityError(
2066
"Verify failed")
1391
raise (gnutls.errors.CertificateSecurityError
1392
("Verify failed"))
2067
1393
# New buffer for the fingerprint
2068
1394
buf = ctypes.create_string_buffer(20)
2069
1395
buf_len = ctypes.c_size_t()
2070
1396
# Get the fingerprint from the certificate into the buffer
2071
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint(
2072
crt, ctypes.byref(buf), ctypes.byref(buf_len))
1397
(gnutls.library.functions
1398
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1399
ctypes.byref(buf_len)))
2073
1400
# Deinit the certificate
2074
1401
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2075
1402
# Convert the buffer to a Python bytestring
2076
1403
fpr = ctypes.string_at(buf, buf_len.value)
2077
1404
# Convert the bytestring to hexadecimal notation
2078
hex_fpr = binascii.hexlify(fpr).upper()
1405
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
2079
1406
return hex_fpr
2080
1407
2081
1408
2082
1409
class MultiprocessingMixIn(object):
2083
1410
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2084
2085
1411
def sub_process_main(self, request, address):
2086
1412
try:
2087
1413
self.finish_request(request, address)
2088
except Exception:
1414
except:
2089
1415
self.handle_error(request, address)
2090
1416
self.close_request(request)
2091
1417
2092
1418
def process_request(self, request, address):
2093
1419
"""Start a new process to process the request."""
2094
proc = multiprocessing.Process(target = self.sub_process_main,
2095
args = (request, address))
2096
proc.start()
2097
return proc
2098
1420
multiprocessing.Process(target = self.sub_process_main,
1421
args = (request, address)).start()
2099
1422
2100
1423
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
2101
1424
""" adds a pipe to the MixIn """
2102
2103
1425
def process_request(self, request, client_address):
2104
1426
"""Overrides and wraps the original process_request().
2105
1427
2106
1428
This function creates a new pipe in self.pipe
2107
1429
"""
2108
1430
parent_pipe, self.child_pipe = multiprocessing.Pipe()
2109
2110
proc = MultiprocessingMixIn.process_request(self, request,
2111
client_address)
1431
1432
super(MultiprocessingMixInWithPipe,
1433
self).process_request(request, client_address)
2112
1434
self.child_pipe.close()
2113
self.add_pipe(parent_pipe, proc)
2114
2115
def add_pipe(self, parent_pipe, proc):
1435
self.add_pipe(parent_pipe)
1436
1437
def add_pipe(self, parent_pipe):
2116
1438
"""Dummy function; override as necessary"""
2117
raise NotImplementedError()
2118
1439
raise NotImplementedError
2119
1440
2120
1441
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
2121
1442
socketserver.TCPServer, object):
2126
1447
interface: None or a network interface name (string)
2127
1448
use_ipv6: Boolean; to use IPv6 or not
2128
1449
"""
2129
2130
1450
def __init__(self, server_address, RequestHandlerClass,
2131
interface=None,
2132
use_ipv6=True,
2133
socketfd=None):
2134
"""If socketfd is set, use that file descriptor instead of
2135
creating a new one with socket.socket().
2136
"""
1451
interface=None, use_ipv6=True):
2137
1452
self.interface = interface
2138
1453
if use_ipv6:
2139
1454
self.address_family = socket.AF_INET6
2140
if socketfd is not None:
2141
# Save the file descriptor
2142
self.socketfd = socketfd
2143
# Save the original socket.socket() function
2144
self.socket_socket = socket.socket
2145
# To implement --socket, we monkey patch socket.socket.
2146
#
2147
# (When socketserver.TCPServer is a new-style class, we
2148
# could make self.socket into a property instead of monkey
2149
# patching socket.socket.)
2150
#
2151
# Create a one-time-only replacement for socket.socket()
2152
@functools.wraps(socket.socket)
2153
def socket_wrapper(*args, **kwargs):
2154
# Restore original function so subsequent calls are
2155
# not affected.
2156
socket.socket = self.socket_socket
2157
del self.socket_socket
2158
# This time only, return a new socket object from the
2159
# saved file descriptor.
2160
return socket.fromfd(self.socketfd, *args, **kwargs)
2161
# Replace socket.socket() function with wrapper
2162
socket.socket = socket_wrapper
2163
# The socketserver.TCPServer.__init__ will call
2164
# socket.socket(), which might be our replacement,
2165
# socket_wrapper(), if socketfd was set.
2166
1455
socketserver.TCPServer.__init__(self, server_address,
2167
1456
RequestHandlerClass)
2168
2169
1457
def server_bind(self):
2170
1458
"""This overrides the normal server_bind() function
2171
1459
to bind to an interface if one was specified, and also NOT to
2177
1465
self.interface)
2178
1466
else:
2179
1467
try:
2180
self.socket.setsockopt(
2181
socket.SOL_SOCKET, SO_BINDTODEVICE,
2182
(self.interface + "\0").encode("utf-8"))
1468
self.socket.setsockopt(socket.SOL_SOCKET,
1469
SO_BINDTODEVICE,
1470
str(self.interface
1471
+ '\0'))
2183
1472
except socket.error as error:
2184
if error.errno == errno.EPERM:
2185
logger.error("No permission to bind to"
2186
" interface %s", self.interface)
2187
elif error.errno == errno.ENOPROTOOPT:
1473
if error[0] == errno.EPERM:
1474
logger.error("No permission to"
1475
" bind to interface %s",
1476
self.interface)
1477
elif error[0] == errno.ENOPROTOOPT:
2188
1478
logger.error("SO_BINDTODEVICE not available;"
2189
1479
" cannot bind to interface %s",
2190
1480
self.interface)
2191
elif error.errno == errno.ENODEV:
2192
logger.error("Interface %s does not exist,"
2193
" cannot bind", self.interface)
2194
1481
else:
2195
1482
raise
2196
1483
# Only bind(2) the socket if we really need to.
2199
1486
if self.address_family == socket.AF_INET6:
2200
1487
any_address = "::" # in6addr_any
2201
1488
else:
2202
any_address = "0.0.0.0" # INADDR_ANY
1489
any_address = socket.INADDR_ANY
2203
1490
self.server_address = (any_address,
2204
1491
self.server_address[1])
2205
1492
elif not self.server_address[1]:
2206
self.server_address = (self.server_address[0], 0)
1493
self.server_address = (self.server_address[0],
1494
0)
2207
1495
# if self.interface:
2208
1496
# self.server_address = (self.server_address[0],
2209
1497
# 0, # port
2223
1511
2224
1512
Assumes a gobject.MainLoop event loop.
2225
1513
"""
2226
2227
1514
def __init__(self, server_address, RequestHandlerClass,
2228
interface=None,
2229
use_ipv6=True,
2230
clients=None,
2231
gnutls_priority=None,
2232
use_dbus=True,
2233
socketfd=None):
1515
interface=None, use_ipv6=True, clients=None,
1516
gnutls_priority=None, use_dbus=True):
2234
1517
self.enabled = False
2235
1518
self.clients = clients
2236
1519
if self.clients is None:
2237
self.clients = {}
1520
self.clients = set()
2238
1521
self.use_dbus = use_dbus
2239
1522
self.gnutls_priority = gnutls_priority
2240
1523
IPv6_TCPServer.__init__(self, server_address,
2241
1524
RequestHandlerClass,
2242
1525
interface = interface,
2243
use_ipv6 = use_ipv6,
2244
socketfd = socketfd)
2245
1526
use_ipv6 = use_ipv6)
2246
1527
def server_activate(self):
2247
1528
if self.enabled:
2248
1529
return socketserver.TCPServer.server_activate(self)
2249
2250
1530
def enable(self):
2251
1531
self.enabled = True
2252
2253
def add_pipe(self, parent_pipe, proc):
1532
def add_pipe(self, parent_pipe):
2254
1533
# Call "handle_ipc" for both data and EOF events
2255
gobject.io_add_watch(
2256
parent_pipe.fileno(),
2257
gobject.IO_IN | gobject.IO_HUP,
2258
functools.partial(self.handle_ipc,
2259
parent_pipe = parent_pipe,
2260
proc = proc))
2261
2262
def handle_ipc(self, source, condition,
2263
parent_pipe=None,
2264
proc = None,
1534
gobject.io_add_watch(parent_pipe.fileno(),
1535
gobject.IO_IN | gobject.IO_HUP,
1536
functools.partial(self.handle_ipc,
1537
parent_pipe = parent_pipe))
1538
1539
def handle_ipc(self, source, condition, parent_pipe=None,
2265
1540
client_object=None):
2266
# error, or the other end of multiprocessing.Pipe has closed
2267
if condition & (gobject.IO_ERR | gobject.IO_HUP):
2268
# Wait for other process to exit
2269
proc.join()
1541
condition_names = {
1542
gobject.IO_IN: "IN", # There is data to read.
1543
gobject.IO_OUT: "OUT", # Data can be written (without
1544
# blocking).
1545
gobject.IO_PRI: "PRI", # There is urgent data to read.
1546
gobject.IO_ERR: "ERR", # Error condition.
1547
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1548
# broken, usually for pipes and
1549
# sockets).
1550
}
1551
conditions_string = ' | '.join(name
1552
for cond, name in
1553
condition_names.iteritems()
1554
if cond & condition)
1555
# error or the other end of multiprocessing.Pipe has closed
1556
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
2270
1557
return False
2271
1558
2272
1559
# Read a request from the child
2277
1564
fpr = request[1]
2278
1565
address = request[2]
2279
1566
2280
for c in self.clients.itervalues():
1567
for c in self.clients:
2281
1568
if c.fingerprint == fpr:
2282
1569
client = c
2283
1570
break
2286
1573
"dress: %s", fpr, address)
2287
1574
if self.use_dbus:
2288
1575
# Emit D-Bus signal
2289
mandos_dbus_service.ClientNotFound(fpr,
2290
address[0])
1576
mandos_dbus_service.ClientNotFound(fpr, address[0])
2291
1577
parent_pipe.send(False)
2292
1578
return False
2293
1579
2294
gobject.io_add_watch(
2295
parent_pipe.fileno(),
2296
gobject.IO_IN | gobject.IO_HUP,
2297
functools.partial(self.handle_ipc,
2298
parent_pipe = parent_pipe,
2299
proc = proc,
2300
client_object = client))
1580
gobject.io_add_watch(parent_pipe.fileno(),
1581
gobject.IO_IN | gobject.IO_HUP,
1582
functools.partial(self.handle_ipc,
1583
parent_pipe = parent_pipe,
1584
client_object = client))
2301
1585
parent_pipe.send(True)
2302
# remove the old hook in favor of the new above hook on
2303
# same fileno
1586
# remove the old hook in favor of the new above hook on same fileno
2304
1587
return False
2305
1588
if command == 'funcall':
2306
1589
funcname = request[1]
2307
1590
args = request[2]
2308
1591
kwargs = request[3]
2309
1592
2310
parent_pipe.send(('data', getattr(client_object,
2311
funcname)(*args,
2312
**kwargs)))
2313
1593
parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))
1594
2314
1595
if command == 'getattr':
2315
1596
attrname = request[1]
2316
if isinstance(client_object.__getattribute__(attrname),
2317
collections.Callable):
2318
parent_pipe.send(('function', ))
1597
if callable(client_object.__getattribute__(attrname)):
1598
parent_pipe.send(('function',))
2319
1599
else:
2320
parent_pipe.send((
2321
'data', client_object.__getattribute__(attrname)))
1600
parent_pipe.send(('data', client_object.__getattribute__(attrname)))
2322
1601
2323
1602
if command == 'setattr':
2324
1603
attrname = request[1]
2325
1604
value = request[2]
2326
1605
setattr(client_object, attrname, value)
2327
1606
2328
1607
return True
2329
1608
2330
1609
2331
def rfc3339_duration_to_delta(duration):
2332
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2333
2334
>>> rfc3339_duration_to_delta("P7D")
2335
datetime.timedelta(7)
2336
>>> rfc3339_duration_to_delta("PT60S")
2337
datetime.timedelta(0, 60)
2338
>>> rfc3339_duration_to_delta("PT60M")
2339
datetime.timedelta(0, 3600)
2340
>>> rfc3339_duration_to_delta("PT24H")
2341
datetime.timedelta(1)
2342
>>> rfc3339_duration_to_delta("P1W")
2343
datetime.timedelta(7)
2344
>>> rfc3339_duration_to_delta("PT5M30S")
2345
datetime.timedelta(0, 330)
2346
>>> rfc3339_duration_to_delta("P1DT3M20S")
2347
datetime.timedelta(1, 200)
2348
"""
2349
2350
# Parsing an RFC 3339 duration with regular expressions is not
2351
# possible - there would have to be multiple places for the same
2352
# values, like seconds. The current code, while more esoteric, is
2353
# cleaner without depending on a parsing library. If Python had a
2354
# built-in library for parsing we would use it, but we'd like to
2355
# avoid excessive use of external libraries.
2356
2357
# New type for defining tokens, syntax, and semantics all-in-one
2358
Token = collections.namedtuple("Token", (
2359
"regexp", # To match token; if "value" is not None, must have
2360
# a "group" containing digits
2361
"value", # datetime.timedelta or None
2362
"followers")) # Tokens valid after this token
2363
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2364
# the "duration" ABNF definition in RFC 3339, Appendix A.
2365
token_end = Token(re.compile(r"$"), None, frozenset())
2366
token_second = Token(re.compile(r"(\d+)S"),
2367
datetime.timedelta(seconds=1),
2368
frozenset((token_end, )))
2369
token_minute = Token(re.compile(r"(\d+)M"),
2370
datetime.timedelta(minutes=1),
2371
frozenset((token_second, token_end)))
2372
token_hour = Token(re.compile(r"(\d+)H"),
2373
datetime.timedelta(hours=1),
2374
frozenset((token_minute, token_end)))
2375
token_time = Token(re.compile(r"T"),
2376
None,
2377
frozenset((token_hour, token_minute,
2378
token_second)))
2379
token_day = Token(re.compile(r"(\d+)D"),
2380
datetime.timedelta(days=1),
2381
frozenset((token_time, token_end)))
2382
token_month = Token(re.compile(r"(\d+)M"),
2383
datetime.timedelta(weeks=4),
2384
frozenset((token_day, token_end)))
2385
token_year = Token(re.compile(r"(\d+)Y"),
2386
datetime.timedelta(weeks=52),
2387
frozenset((token_month, token_end)))
2388
token_week = Token(re.compile(r"(\d+)W"),
2389
datetime.timedelta(weeks=1),
2390
frozenset((token_end, )))
2391
token_duration = Token(re.compile(r"P"), None,
2392
frozenset((token_year, token_month,
2393
token_day, token_time,
2394
token_week)))
2395
# Define starting values
2396
value = datetime.timedelta() # Value so far
2397
found_token = None
2398
followers = frozenset((token_duration, )) # Following valid tokens
2399
s = duration # String left to parse
2400
# Loop until end token is found
2401
while found_token is not token_end:
2402
# Search for any currently valid tokens
2403
for token in followers:
2404
match = token.regexp.match(s)
2405
if match is not None:
2406
# Token found
2407
if token.value is not None:
2408
# Value found, parse digits
2409
factor = int(match.group(1), 10)
2410
# Add to value so far
2411
value += factor * token.value
2412
# Strip token from string
2413
s = token.regexp.sub("", s, 1)
2414
# Go to found token
2415
found_token = token
2416
# Set valid next tokens
2417
followers = found_token.followers
2418
break
2419
else:
2420
# No currently valid tokens were found
2421
raise ValueError("Invalid RFC 3339 duration: {!r}"
2422
.format(duration))
2423
# End token found
2424
return value
2425
2426
2427
1610
def string_to_delta(interval):
2428
1611
"""Parse a string and return a datetime.timedelta
2429
1612
2440
1623
>>> string_to_delta('5m 30s')
2441
1624
datetime.timedelta(0, 330)
2442
1625
"""
2443
2444
try:
2445
return rfc3339_duration_to_delta(interval)
2446
except ValueError:
2447
pass
2448
2449
1626
timevalue = datetime.timedelta(0)
2450
1627
for s in interval.split():
2451
1628
try:
2452
suffix = s[-1]
1629
suffix = unicode(s[-1])
2453
1630
value = int(s[:-1])
2454
1631
if suffix == "d":
2455
1632
delta = datetime.timedelta(value)
2462
1639
elif suffix == "w":
2463
1640
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
2464
1641
else:
2465
raise ValueError("Unknown suffix {!r}".format(suffix))
2466
except IndexError as e:
1642
raise ValueError("Unknown suffix %r" % suffix)
1643
except (ValueError, IndexError) as e:
2467
1644
raise ValueError(*(e.args))
2468
1645
timevalue += delta
2469
1646
return timevalue
2470
1647
2471
1648
1649
def if_nametoindex(interface):
1650
"""Call the C function if_nametoindex(), or equivalent
1651
1652
Note: This function cannot accept a unicode string."""
1653
global if_nametoindex
1654
try:
1655
if_nametoindex = (ctypes.cdll.LoadLibrary
1656
(ctypes.util.find_library("c"))
1657
.if_nametoindex)
1658
except (OSError, AttributeError):
1659
logger.warning("Doing if_nametoindex the hard way")
1660
def if_nametoindex(interface):
1661
"Get an interface index the hard way, i.e. using fcntl()"
1662
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1663
with contextlib.closing(socket.socket()) as s:
1664
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1665
struct.pack(str("16s16x"),
1666
interface))
1667
interface_index = struct.unpack(str("I"),
1668
ifreq[16:20])[0]
1669
return interface_index
1670
return if_nametoindex(interface)
1671
1672
2472
1673
def daemon(nochdir = False, noclose = False):
2473
1674
"""See daemon(3). Standard BSD Unix function.
2474
1675
2482
1683
sys.exit()
2483
1684
if not noclose:
2484
1685
# Close all standard open file descriptors
2485
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1686
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2486
1687
if not stat.S_ISCHR(os.fstat(null).st_mode):
2487
1688
raise OSError(errno.ENODEV,
2488
"{} not a character device"
2489
.format(os.devnull))
1689
"%s not a character device"
1690
% os.path.devnull)
2490
1691
os.dup2(null, sys.stdin.fileno())
2491
1692
os.dup2(null, sys.stdout.fileno())
2492
1693
os.dup2(null, sys.stderr.fileno())
2501
1702
2502
1703
parser = argparse.ArgumentParser()
2503
1704
parser.add_argument("-v", "--version", action="version",
2504
version = "%(prog)s {}".format(version),
1705
version = "%%(prog)s %s" % version,
2505
1706
help="show version number and exit")
2506
1707
parser.add_argument("-i", "--interface", metavar="IF",
2507
1708
help="Bind to interface IF")
2513
1714
help="Run self-test")
2514
1715
parser.add_argument("--debug", action="store_true",
2515
1716
help="Debug mode; run in foreground and log"
2516
" to terminal", default=None)
1717
" to terminal")
2517
1718
parser.add_argument("--debuglevel", metavar="LEVEL",
2518
1719
help="Debug level for stdout output")
2519
1720
parser.add_argument("--priority", help="GnuTLS"
2526
1727
" files")
2527
1728
parser.add_argument("--no-dbus", action="store_false",
2528
1729
dest="use_dbus", help="Do not provide D-Bus"
2529
" system bus interface", default=None)
1730
" system bus interface")
2530
1731
parser.add_argument("--no-ipv6", action="store_false",
2531
dest="use_ipv6", help="Do not use IPv6",
2532
default=None)
2533
parser.add_argument("--no-restore", action="store_false",
2534
dest="restore", help="Do not restore stored"
2535
" state", default=None)
2536
parser.add_argument("--socket", type=int,
2537
help="Specify a file descriptor to a network"
2538
" socket to use instead of creating one")
2539
parser.add_argument("--statedir", metavar="DIR",
2540
help="Directory to save/restore state in")
2541
parser.add_argument("--foreground", action="store_true",
2542
help="Run in foreground", default=None)
2543
parser.add_argument("--no-zeroconf", action="store_false",
2544
dest="zeroconf", help="Do not use Zeroconf",
2545
default=None)
2546
1732
dest="use_ipv6", help="Do not use IPv6")
2547
1733
options = parser.parse_args()
2548
1734
2549
1735
if options.check:
2550
1736
import doctest
2551
fail_count, test_count = doctest.testmod()
2552
sys.exit(os.EX_OK if fail_count == 0 else 1)
1737
doctest.testmod()
1738
sys.exit()
2553
1739
2554
1740
# Default values for config file for server-global settings
2555
1741
server_defaults = { "interface": "",
2557
1743
"port": "",
2558
1744
"debug": "False",
2559
1745
"priority":
2560
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2561
":+SIGN-DSA-SHA256",
1746
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2562
1747
"servicename": "Mandos",
2563
1748
"use_dbus": "True",
2564
1749
"use_ipv6": "True",
2565
1750
"debuglevel": "",
2566
"restore": "True",
2567
"socket": "",
2568
"statedir": "/var/lib/mandos",
2569
"foreground": "False",
2570
"zeroconf": "True",
2571
}
1751
}
2572
1752
2573
1753
# Parse config file for server-global settings
2574
1754
server_config = configparser.SafeConfigParser(server_defaults)
2575
1755
del server_defaults
2576
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1756
server_config.read(os.path.join(options.configdir,
1757
"mandos.conf"))
2577
1758
# Convert the SafeConfigParser object to a dict
2578
1759
server_settings = server_config.defaults()
2579
1760
# Use the appropriate methods on the non-string config options
2580
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
1761
for option in ("debug", "use_dbus", "use_ipv6"):
2581
1762
server_settings[option] = server_config.getboolean("DEFAULT",
2582
1763
option)
2583
1764
if server_settings["port"]:
2584
1765
server_settings["port"] = server_config.getint("DEFAULT",
2585
1766
"port")
2586
if server_settings["socket"]:
2587
server_settings["socket"] = server_config.getint("DEFAULT",
2588
"socket")
2589
# Later, stdin will, and stdout and stderr might, be dup'ed
2590
# over with an opened os.devnull. But we don't want this to
2591
# happen with a supplied network socket.
2592
if 0 <= server_settings["socket"] <= 2:
2593
server_settings["socket"] = os.dup(server_settings
2594
["socket"])
2595
1767
del server_config
2596
1768
2597
1769
# Override the settings from the config file with command line
2598
1770
# options, if set.
2599
1771
for option in ("interface", "address", "port", "debug",
2600
"priority", "servicename", "configdir", "use_dbus",
2601
"use_ipv6", "debuglevel", "restore", "statedir",
2602
"socket", "foreground", "zeroconf"):
1772
"priority", "servicename", "configdir",
1773
"use_dbus", "use_ipv6", "debuglevel"):
2603
1774
value = getattr(options, option)
2604
1775
if value is not None:
2605
1776
server_settings[option] = value
2606
1777
del options
2607
1778
# Force all strings to be unicode
2608
1779
for option in server_settings.keys():
2609
if isinstance(server_settings[option], bytes):
2610
server_settings[option] = (server_settings[option]
2611
.decode("utf-8"))
2612
# Force all boolean options to be boolean
2613
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2614
"foreground", "zeroconf"):
2615
server_settings[option] = bool(server_settings[option])
2616
# Debug implies foreground
2617
if server_settings["debug"]:
2618
server_settings["foreground"] = True
1780
if type(server_settings[option]) is str:
1781
server_settings[option] = unicode(server_settings[option])
2619
1782
# Now we have our good server settings in "server_settings"
2620
1783
2621
1784
##################################################################
2622
1785
2623
if (not server_settings["zeroconf"]
2624
and not (server_settings["port"]
2625
or server_settings["socket"] != "")):
2626
parser.error("Needs port or socket to work without Zeroconf")
2627
2628
1786
# For convenience
2629
1787
debug = server_settings["debug"]
2630
1788
debuglevel = server_settings["debuglevel"]
2631
1789
use_dbus = server_settings["use_dbus"]
2632
1790
use_ipv6 = server_settings["use_ipv6"]
2633
stored_state_path = os.path.join(server_settings["statedir"],
2634
stored_state_file)
2635
foreground = server_settings["foreground"]
2636
zeroconf = server_settings["zeroconf"]
2637
2638
if debug:
2639
initlogger(debug, logging.DEBUG)
2640
else:
2641
if not debuglevel:
2642
initlogger(debug)
2643
else:
2644
level = getattr(logging, debuglevel.upper())
2645
initlogger(debug, level)
2646
1791
2647
1792
if server_settings["servicename"] != "Mandos":
2648
syslogger.setFormatter(
2649
logging.Formatter('Mandos ({}) [%(process)d]:'
2650
' %(levelname)s: %(message)s'.format(
2651
server_settings["servicename"])))
1793
syslogger.setFormatter(logging.Formatter
1794
('Mandos (%s) [%%(process)d]:'
1795
' %%(levelname)s: %%(message)s'
1796
% server_settings["servicename"]))
2652
1797
2653
1798
# Parse config file with clients
2654
client_config = configparser.SafeConfigParser(Client
2655
.client_defaults)
1799
client_defaults = { "timeout": "1h",
1800
"interval": "5m",
1801
"checker": "fping -q -- %%(host)s",
1802
"host": "",
1803
"approval_delay": "0s",
1804
"approval_duration": "1s",
1805
}
1806
client_config = configparser.SafeConfigParser(client_defaults)
2656
1807
client_config.read(os.path.join(server_settings["configdir"],
2657
1808
"clients.conf"))
2658
1809
2659
1810
global mandos_dbus_service
2660
1811
mandos_dbus_service = None
2661
1812
2662
socketfd = None
2663
if server_settings["socket"] != "":
2664
socketfd = server_settings["socket"]
2665
tcp_server = MandosServer(
2666
(server_settings["address"], server_settings["port"]),
2667
ClientHandler,
2668
interface=(server_settings["interface"] or None),
2669
use_ipv6=use_ipv6,
2670
gnutls_priority=server_settings["priority"],
2671
use_dbus=use_dbus,
2672
socketfd=socketfd)
2673
if not foreground:
2674
pidfilename = "/run/mandos.pid"
2675
if not os.path.isdir("/run/."):
2676
pidfilename = "/var/run/mandos.pid"
2677
pidfile = None
1813
tcp_server = MandosServer((server_settings["address"],
1814
server_settings["port"]),
1815
ClientHandler,
1816
interface=(server_settings["interface"]
1817
or None),
1818
use_ipv6=use_ipv6,
1819
gnutls_priority=
1820
server_settings["priority"],
1821
use_dbus=use_dbus)
1822
if not debug:
1823
pidfilename = "/var/run/mandos.pid"
2678
1824
try:
2679
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
2680
except IOError as e:
2681
logger.error("Could not open file %r", pidfilename,
2682
exc_info=e)
1825
pidfile = open(pidfilename, "w")
1826
except IOError:
1827
logger.error("Could not open file %r", pidfilename)
2683
1828
2684
for name in ("_mandos", "mandos", "nobody"):
1829
try:
1830
uid = pwd.getpwnam("_mandos").pw_uid
1831
gid = pwd.getpwnam("_mandos").pw_gid
1832
except KeyError:
2685
1833
try:
2686
uid = pwd.getpwnam(name).pw_uid
2687
gid = pwd.getpwnam(name).pw_gid
2688
break
1834
uid = pwd.getpwnam("mandos").pw_uid
1835
gid = pwd.getpwnam("mandos").pw_gid
2689
1836
except KeyError:
2690
continue
2691
else:
2692
uid = 65534
2693
gid = 65534
1837
try:
1838
uid = pwd.getpwnam("nobody").pw_uid
1839
gid = pwd.getpwnam("nobody").pw_gid
1840
except KeyError:
1841
uid = 65534
1842
gid = 65534
2694
1843
try:
2695
1844
os.setgid(gid)
2696
1845
os.setuid(uid)
2697
1846
except OSError as error:
2698
if error.errno != errno.EPERM:
2699
raise
1847
if error[0] != errno.EPERM:
1848
raise error
2700
1849
1850
if not debug and not debuglevel:
1851
syslogger.setLevel(logging.WARNING)
1852
console.setLevel(logging.WARNING)
1853
if debuglevel:
1854
level = getattr(logging, debuglevel.upper())
1855
syslogger.setLevel(level)
1856
console.setLevel(level)
1857
2701
1858
if debug:
2702
1859
# Enable all possible GnuTLS debugging
2703
1860
2709
1866
def debug_gnutls(level, string):
2710
1867
logger.debug("GnuTLS: %s", string[:-1])
2711
1868
2712
gnutls.library.functions.gnutls_global_set_log_function(
2713
debug_gnutls)
1869
(gnutls.library.functions
1870
.gnutls_global_set_log_function(debug_gnutls))
2714
1871
2715
1872
# Redirect stdin so all checkers get /dev/null
2716
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1873
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2717
1874
os.dup2(null, sys.stdin.fileno())
2718
1875
if null > 2:
2719
1876
os.close(null)
1877
else:
1878
# No console logging
1879
logger.removeHandler(console)
2720
1880
2721
1881
# Need to fork before connecting to D-Bus
2722
if not foreground:
1882
if not debug:
2723
1883
# Close all input and output, do double fork, etc.
2724
1884
daemon()
2725
1885
2726
# multiprocessing will use threads, so before we use gobject we
2727
# need to inform gobject that threads will be used.
2728
gobject.threads_init()
2729
2730
1886
global main_loop
2731
1887
# From the Avahi example code
2732
DBusGMainLoop(set_as_default=True)
1888
DBusGMainLoop(set_as_default=True )
2733
1889
main_loop = gobject.MainLoop()
2734
1890
bus = dbus.SystemBus()
2735
1891
# End of Avahi example code
2736
1892
if use_dbus:
2737
1893
try:
2738
bus_name = dbus.service.BusName("se.recompile.Mandos",
2739
bus,
2740
do_not_queue=True)
2741
old_bus_name = dbus.service.BusName(
2742
"se.bsnet.fukt.Mandos", bus,
2743
do_not_queue=True)
2744
except dbus.exceptions.DBusException as e:
2745
logger.error("Disabling D-Bus:", exc_info=e)
1894
bus_name = dbus.service.BusName("se.bsnet.fukt.Mandos",
1895
bus, do_not_queue=True)
1896
except dbus.exceptions.NameExistsException as e:
1897
logger.error(unicode(e) + ", disabling D-Bus")
2746
1898
use_dbus = False
2747
1899
server_settings["use_dbus"] = False
2748
1900
tcp_server.use_dbus = False
2749
if zeroconf:
2750
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2751
service = AvahiServiceToSyslog(
2752
name = server_settings["servicename"],
2753
servicetype = "_mandos._tcp",
2754
protocol = protocol,
2755
bus = bus)
2756
if server_settings["interface"]:
2757
service.interface = if_nametoindex(
2758
server_settings["interface"].encode("utf-8"))
1901
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1902
service = AvahiService(name = server_settings["servicename"],
1903
servicetype = "_mandos._tcp",
1904
protocol = protocol, bus = bus)
1905
if server_settings["interface"]:
1906
service.interface = (if_nametoindex
1907
(str(server_settings["interface"])))
2759
1908
2760
1909
global multiprocessing_manager
2761
1910
multiprocessing_manager = multiprocessing.Manager()
2763
1912
client_class = Client
2764
1913
if use_dbus:
2765
1914
client_class = functools.partial(ClientDBus, bus = bus)
2766
2767
client_settings = Client.config_parser(client_config)
2768
old_client_settings = {}
2769
clients_data = {}
2770
2771
# This is used to redirect stdout and stderr for checker processes
2772
global wnull
2773
wnull = open(os.devnull, "w") # A writable /dev/null
2774
# Only used if server is running in foreground but not in debug
2775
# mode
2776
if debug or not foreground:
2777
wnull.close()
2778
2779
# Get client data and settings from last running state.
2780
if server_settings["restore"]:
2781
try:
2782
with open(stored_state_path, "rb") as stored_state:
2783
clients_data, old_client_settings = pickle.load(
2784
stored_state)
2785
os.remove(stored_state_path)
2786
except IOError as e:
2787
if e.errno == errno.ENOENT:
2788
logger.warning("Could not load persistent state:"
2789
" {}".format(os.strerror(e.errno)))
2790
else:
2791
logger.critical("Could not load persistent state:",
2792
exc_info=e)
2793
raise
2794
except EOFError as e:
2795
logger.warning("Could not load persistent state: "
2796
"EOFError:",
2797
exc_info=e)
2798
2799
with PGPEngine() as pgp:
2800
for client_name, client in clients_data.items():
2801
# Skip removed clients
2802
if client_name not in client_settings:
2803
continue
2804
2805
# Decide which value to use after restoring saved state.
2806
# We have three different values: Old config file,
2807
# new config file, and saved state.
2808
# New config value takes precedence if it differs from old
2809
# config value, otherwise use saved state.
2810
for name, value in client_settings[client_name].items():
2811
try:
2812
# For each value in new config, check if it
2813
# differs from the old config value (Except for
2814
# the "secret" attribute)
2815
if (name != "secret"
2816
and (value !=
2817
old_client_settings[client_name][name])):
2818
client[name] = value
2819
except KeyError:
2820
pass
2821
2822
# Clients who has passed its expire date can still be
2823
# enabled if its last checker was successful. A Client
2824
# whose checker succeeded before we stored its state is
2825
# assumed to have successfully run all checkers during
2826
# downtime.
2827
if client["enabled"]:
2828
if datetime.datetime.utcnow() >= client["expires"]:
2829
if not client["last_checked_ok"]:
2830
logger.warning(
2831
"disabling client {} - Client never "
2832
"performed a successful checker".format(
2833
client_name))
2834
client["enabled"] = False
2835
elif client["last_checker_status"] != 0:
2836
logger.warning(
2837
"disabling client {} - Client last"
2838
" checker failed with error code"
2839
" {}".format(
2840
client_name,
2841
client["last_checker_status"]))
2842
client["enabled"] = False
2843
else:
2844
client["expires"] = (
2845
datetime.datetime.utcnow()
2846
+ client["timeout"])
2847
logger.debug("Last checker succeeded,"
2848
" keeping {} enabled".format(
2849
client_name))
1915
def client_config_items(config, section):
1916
special_settings = {
1917
"approved_by_default":
1918
lambda: config.getboolean(section,
1919
"approved_by_default"),
1920
}
1921
for name, value in config.items(section):
2850
1922
try:
2851
client["secret"] = pgp.decrypt(
2852
client["encrypted_secret"],
2853
client_settings[client_name]["secret"])
2854
except PGPError:
2855
# If decryption fails, we use secret from new settings
2856
logger.debug("Failed to decrypt {} old secret".format(
2857
client_name))
2858
client["secret"] = (client_settings[client_name]
2859
["secret"])
2860
2861
# Add/remove clients based on new changes made to config
2862
for client_name in (set(old_client_settings)
2863
- set(client_settings)):
2864
del clients_data[client_name]
2865
for client_name in (set(client_settings)
2866
- set(old_client_settings)):
2867
clients_data[client_name] = client_settings[client_name]
2868
2869
# Create all client objects
2870
for client_name, client in clients_data.items():
2871
tcp_server.clients[client_name] = client_class(
2872
name = client_name,
2873
settings = client,
2874
server_settings = server_settings)
2875
1923
yield (name, special_settings[name]())
1924
except KeyError:
1925
yield (name, value)
1926
1927
tcp_server.clients.update(set(
1928
client_class(name = section,
1929
config= dict(client_config_items(
1930
client_config, section)))
1931
for section in client_config.sections()))
2876
1932
if not tcp_server.clients:
2877
1933
logger.warning("No clients defined")
2878
2879
if not foreground:
2880
if pidfile is not None:
2881
pid = os.getpid()
2882
try:
2883
with pidfile:
2884
print(pid, file=pidfile)
2885
except IOError:
2886
logger.error("Could not write to file %r with PID %d",
2887
pidfilename, pid)
2888
del pidfile
1934
1935
if not debug:
1936
try:
1937
with pidfile:
1938
pid = os.getpid()
1939
pidfile.write(str(pid) + "\n".encode("utf-8"))
1940
del pidfile
1941
except IOError:
1942
logger.error("Could not write to file %r with PID %d",
1943
pidfilename, pid)
1944
except NameError:
1945
# "pidfile" was never created
1946
pass
2889
1947
del pidfilename
2890
1948
1949
signal.signal(signal.SIGINT, signal.SIG_IGN)
1950
2891
1951
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2892
1952
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2893
1953
2894
1954
if use_dbus:
2895
2896
@alternate_dbus_interfaces(
2897
{ "se.recompile.Mandos": "se.bsnet.fukt.Mandos" })
2898
class MandosDBusService(DBusObjectWithObjectManager):
1955
class MandosDBusService(dbus.service.Object):
2899
1956
"""A D-Bus proxy object"""
2900
2901
1957
def __init__(self):
2902
1958
dbus.service.Object.__init__(self, bus, "/")
2903
2904
_interface = "se.recompile.Mandos"
1959
_interface = "se.bsnet.fukt.Mandos"
2905
1960
2906
1961
@dbus.service.signal(_interface, signature="o")
2907
1962
def ClientAdded(self, objpath):
2913
1968
"D-Bus signal"
2914
1969
pass
2915
1970
2916
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
2917
"true"})
2918
1971
@dbus.service.signal(_interface, signature="os")
2919
1972
def ClientRemoved(self, objpath, name):
2920
1973
"D-Bus signal"
2921
1974
pass
2922
1975
2923
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
2924
"true"})
2925
1976
@dbus.service.method(_interface, out_signature="ao")
2926
1977
def GetAllClients(self):
2927
1978
"D-Bus method"
2928
return dbus.Array(c.dbus_object_path for c in
2929
tcp_server.clients.itervalues())
1979
return dbus.Array(c.dbus_object_path
1980
for c in tcp_server.clients)
2930
1981
2931
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
2932
"true"})
2933
1982
@dbus.service.method(_interface,
2934
1983
out_signature="a{oa{sv}}")
2935
1984
def GetAllClientsWithProperties(self):
2936
1985
"D-Bus method"
2937
1986
return dbus.Dictionary(
2938
{ c.dbus_object_path: c.GetAll(
2939
"se.recompile.Mandos.Client")
2940
for c in tcp_server.clients.itervalues() },
1987
((c.dbus_object_path, c.GetAll(""))
1988
for c in tcp_server.clients),
2941
1989
signature="oa{sv}")
2942
1990
2943
1991
@dbus.service.method(_interface, in_signature="o")
2944
1992
def RemoveClient(self, object_path):
2945
1993
"D-Bus method"
2946
for c in tcp_server.clients.itervalues():
1994
for c in tcp_server.clients:
2947
1995
if c.dbus_object_path == object_path:
2948
del tcp_server.clients[c.name]
1996
tcp_server.clients.remove(c)
2949
1997
c.remove_from_connection()
2950
# Don't signal the disabling
1998
# Don't signal anything except ClientRemoved
2951
1999
c.disable(quiet=True)
2952
# Emit D-Bus signal for removal
2953
self.client_removed_signal(c)
2000
# Emit D-Bus signal
2001
self.ClientRemoved(object_path, c.name)
2954
2002
return
2955
2003
raise KeyError(object_path)
2956
2004
2957
2005
del _interface
2958
2959
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
2960
out_signature = "a{oa{sa{sv}}}")
2961
def GetManagedObjects(self):
2962
"""D-Bus method"""
2963
return dbus.Dictionary(
2964
{ client.dbus_object_path:
2965
dbus.Dictionary(
2966
{ interface: client.GetAll(interface)
2967
for interface in
2968
client._get_all_interface_names()})
2969
for client in tcp_server.clients.values()})
2970
2971
def client_added_signal(self, client):
2972
"""Send the new standard signal and the old signal"""
2973
if use_dbus:
2974
# New standard signal
2975
self.InterfacesAdded(
2976
client.dbus_object_path,
2977
dbus.Dictionary(
2978
{ interface: client.GetAll(interface)
2979
for interface in
2980
client._get_all_interface_names()}))
2981
# Old signal
2982
self.ClientAdded(client.dbus_object_path)
2983
2984
def client_removed_signal(self, client):
2985
"""Send the new standard signal and the old signal"""
2986
if use_dbus:
2987
# New standard signal
2988
self.InterfacesRemoved(
2989
client.dbus_object_path,
2990
client._get_all_interface_names())
2991
# Old signal
2992
self.ClientRemoved(client.dbus_object_path,
2993
client.name)
2994
2006
2995
2007
mandos_dbus_service = MandosDBusService()
2996
2008
2997
2009
def cleanup():
2998
2010
"Cleanup function; run on exit"
2999
if zeroconf:
3000
service.cleanup()
3001
3002
multiprocessing.active_children()
3003
wnull.close()
3004
if not (tcp_server.clients or client_settings):
3005
return
3006
3007
# Store client before exiting. Secrets are encrypted with key
3008
# based on what config file has. If config file is
3009
# removed/edited, old secret will thus be unrecovable.
3010
clients = {}
3011
with PGPEngine() as pgp:
3012
for client in tcp_server.clients.itervalues():
3013
key = client_settings[client.name]["secret"]
3014
client.encrypted_secret = pgp.encrypt(client.secret,
3015
key)
3016
client_dict = {}
3017
3018
# A list of attributes that can not be pickled
3019
# + secret.
3020
exclude = { "bus", "changedstate", "secret",
3021
"checker", "server_settings" }
3022
for name, typ in inspect.getmembers(dbus.service
3023
.Object):
3024
exclude.add(name)
3025
3026
client_dict["encrypted_secret"] = (client
3027
.encrypted_secret)
3028
for attr in client.client_structure:
3029
if attr not in exclude:
3030
client_dict[attr] = getattr(client, attr)
3031
3032
clients[client.name] = client_dict
3033
del client_settings[client.name]["secret"]
3034
3035
try:
3036
with tempfile.NamedTemporaryFile(
3037
mode='wb',
3038
suffix=".pickle",
3039
prefix='clients-',
3040
dir=os.path.dirname(stored_state_path),
3041
delete=False) as stored_state:
3042
pickle.dump((clients, client_settings), stored_state)
3043
tempname = stored_state.name
3044
os.rename(tempname, stored_state_path)
3045
except (IOError, OSError) as e:
3046
if not debug:
3047
try:
3048
os.remove(tempname)
3049
except NameError:
3050
pass
3051
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
3052
logger.warning("Could not save persistent state: {}"
3053
.format(os.strerror(e.errno)))
3054
else:
3055
logger.warning("Could not save persistent state:",
3056
exc_info=e)
3057
raise
3058
3059
# Delete all clients, and settings from config
2011
service.cleanup()
2012
3060
2013
while tcp_server.clients:
3061
name, client = tcp_server.clients.popitem()
2014
client = tcp_server.clients.pop()
3062
2015
if use_dbus:
3063
2016
client.remove_from_connection()
3064
# Don't signal the disabling
2017
client.disable_hook = None
2018
# Don't signal anything except ClientRemoved
3065
2019
client.disable(quiet=True)
3066
# Emit D-Bus signal for removal
3067
mandos_dbus_service.client_removed_signal(client)
3068
client_settings.clear()
2020
if use_dbus:
2021
# Emit D-Bus signal
2022
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
2023
client.name)
3069
2024
3070
2025
atexit.register(cleanup)
3071
2026
3072
for client in tcp_server.clients.itervalues():
2027
for client in tcp_server.clients:
3073
2028
if use_dbus:
3074
# Emit D-Bus signal for adding
3075
mandos_dbus_service.client_added_signal(client)
3076
# Need to initiate checking of clients
3077
if client.enabled:
3078
client.init_checker()
2029
# Emit D-Bus signal
2030
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2031
client.enable()
3079
2032
3080
2033
tcp_server.enable()
3081
2034
tcp_server.server_activate()
3082
2035
3083
2036
# Find out what port we got
3084
if zeroconf:
3085
service.port = tcp_server.socket.getsockname()[1]
2037
service.port = tcp_server.socket.getsockname()[1]
3086
2038
if use_ipv6:
3087
2039
logger.info("Now listening on address %r, port %d,"
3088
" flowinfo %d, scope_id %d",
3089
*tcp_server.socket.getsockname())
2040
" flowinfo %d, scope_id %d"
2041
% tcp_server.socket.getsockname())
3090
2042
else: # IPv4
3091
logger.info("Now listening on address %r, port %d",
3092
*tcp_server.socket.getsockname())
2043
logger.info("Now listening on address %r, port %d"
2044
% tcp_server.socket.getsockname())
3093
2045
3094
2046
#service.interface = tcp_server.socket.getsockname()[3]
3095
2047
3096
2048
try:
3097
if zeroconf:
3098
# From the Avahi example code
3099
try:
3100
service.activate()
3101
except dbus.exceptions.DBusException as error:
3102
logger.critical("D-Bus Exception", exc_info=error)
3103
cleanup()
3104
sys.exit(1)
3105
# End of Avahi example code
2049
# From the Avahi example code
2050
try:
2051
service.activate()
2052
except dbus.exceptions.DBusException as error:
2053
logger.critical("DBusException: %s", error)
2054
cleanup()
2055
sys.exit(1)
2056
# End of Avahi example code
3106
2057
3107
2058
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
3108
2059
lambda *args, **kwargs:
3112
2063
logger.debug("Starting main loop")
3113
2064
main_loop.run()
3114
2065
except AvahiError as error:
3115
logger.critical("Avahi Error", exc_info=error)
2066
logger.critical("AvahiError: %s", error)
3116
2067
cleanup()
3117
2068
sys.exit(1)
3118
2069
except KeyboardInterrupt:
3123
2074
# Must run before the D-Bus bus name gets deregistered
3124
2075
cleanup()
3125
2076
3126
3127
2077
if __name__ == '__main__':
3128
2078
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0