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- Committer: Teddy Hogeborn
- Date: 2018-02-08 10:23:55 UTC
- Revision ID: teddy@recompile.se-20180208102355-3ent7sf87i9h9kka
Update copyright year to 2018
* DBUS-API: Update copyright year to 2018.
* debian/copyright: - '' -
* initramfs-unpack: - '' -
* intro.xml: - '' -
* mandos: - '' -
* mandos-clients.conf.xml: - '' -
* mandos-ctl: - '' -
* mandos-ctl.xml: - '' -
* mandos-keygen: - '' -
* mandos-keygen.xml: - '' -
* mandos-monitor: - '' -
* mandos-monitor.xml: - '' -
* mandos.conf.xml: - '' -
* mandos.xml: - '' -
* network-hooks.d/bridge: - '' -
* network-hooks.d/openvpn: - '' -
* network-hooks.d/wireless: - '' -
* plugin-helpers/mandos-client-iprouteadddel.c: - '' -
* plugin-runner.c: - '' -
* plugin-runner.xml: - '' -
* plugins.d/askpass-fifo.c: - '' -
* plugins.d/askpass-fifo.xml: - '' -
* plugins.d/mandos-client.c: - '' -
* plugins.d/mandos-client.xml: - '' -
* plugins.d/password-prompt.c: - '' -
* plugins.d/password-prompt.xml: - '' -
* plugins.d/plymouth.c: - '' -
* plugins.d/plymouth.xml: - '' -
* plugins.d/splashy.c: - '' -
* plugins.d/splashy.xml: - '' -
* plugins.d/usplash.c: - '' -
* plugins.d/usplash.xml: - '' -
* DBUS-API: Update copyright year to 2018.
* debian/copyright: - '' -
* initramfs-unpack: - '' -
* intro.xml: - '' -
* mandos: - '' -
* mandos-clients.conf.xml: - '' -
* mandos-ctl: - '' -
* mandos-ctl.xml: - '' -
* mandos-keygen: - '' -
* mandos-keygen.xml: - '' -
* mandos-monitor: - '' -
* mandos-monitor.xml: - '' -
* mandos.conf.xml: - '' -
* mandos.xml: - '' -
* network-hooks.d/bridge: - '' -
* network-hooks.d/openvpn: - '' -
* network-hooks.d/wireless: - '' -
* plugin-helpers/mandos-client-iprouteadddel.c: - '' -
* plugin-runner.c: - '' -
* plugin-runner.xml: - '' -
* plugins.d/askpass-fifo.c: - '' -
* plugins.d/askpass-fifo.xml: - '' -
* plugins.d/mandos-client.c: - '' -
* plugins.d/mandos-client.xml: - '' -
* plugins.d/password-prompt.c: - '' -
* plugins.d/password-prompt.xml: - '' -
* plugins.d/plymouth.c: - '' -
* plugins.d/plymouth.xml: - '' -
* plugins.d/splashy.c: - '' -
* plugins.d/splashy.xml: - '' -
* plugins.d/usplash.c: - '' -
* plugins.d/usplash.xml: - '' -
- files added:
- bugs.xml
- debian/upstream
- network-hooks.d
- plugin-helpers
- files modified:
- .bzrignore
added
removed
mandos
1
1
#!/usr/bin/python
2
2
# -*- mode: python; coding: utf-8 -*-
3
#
3
#
4
4
# Mandos server - give out binary blobs to connecting clients.
5
#
5
#
6
6
# This program is partly derived from an example program for an Avahi
7
7
# service publisher, downloaded from
8
8
# <http://avahi.org/wiki/PythonPublishExample>. This includes the
9
9
# methods "add", "remove", "server_state_changed",
10
10
# "entry_group_state_changed", "cleanup", and "activate" in the
11
11
# "AvahiService" class, and some lines in "main".
12
#
12
#
13
13
# Everything else is
14
# Copyright © 2008-2011 Teddy Hogeborn
15
# Copyright © 2008-2011 Björn Påhlsson
16
#
17
# This program is free software: you can redistribute it and/or modify
18
# it under the terms of the GNU General Public License as published by
14
# Copyright © 2008-2018 Teddy Hogeborn
15
# Copyright © 2008-2018 Björn Påhlsson
16
#
17
# This file is part of Mandos.
18
#
19
# Mandos is free software: you can redistribute it and/or modify it
20
# under the terms of the GNU General Public License as published by
19
21
# the Free Software Foundation, either version 3 of the License, or
20
22
# (at your option) any later version.
21
23
#
22
# This program is distributed in the hope that it will be useful,
23
# but WITHOUT ANY WARRANTY; without even the implied warranty of
24
# Mandos is distributed in the hope that it will be useful, but
25
# WITHOUT ANY WARRANTY; without even the implied warranty of
24
26
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
25
27
# GNU General Public License for more details.
26
#
28
#
27
29
# You should have received a copy of the GNU General Public License
28
# along with this program. If not, see
29
# <http://www.gnu.org/licenses/>.
30
#
31
# Contact the authors at <mandos@fukt.bsnet.se>.
32
#
30
# along with Mandos. If not, see <http://www.gnu.org/licenses/>.
31
#
32
# Contact the authors at <mandos@recompile.se>.
33
#
33
34
34
35
from __future__ import (division, absolute_import, print_function,
35
36
unicode_literals)
36
37
37
import SocketServer as socketserver
38
try:
39
from future_builtins import *
40
except ImportError:
41
pass
42
43
try:
44
import SocketServer as socketserver
45
except ImportError:
46
import socketserver
38
47
import socket
39
import optparse
48
import argparse
40
49
import datetime
41
50
import errno
42
import gnutls.crypto
43
import gnutls.connection
44
import gnutls.errors
45
import gnutls.library.functions
46
import gnutls.library.constants
47
import gnutls.library.types
48
import ConfigParser as configparser
51
try:
52
import ConfigParser as configparser
53
except ImportError:
54
import configparser
49
55
import sys
50
56
import re
51
57
import os
60
66
import struct
61
67
import fcntl
62
68
import functools
63
import cPickle as pickle
69
try:
70
import cPickle as pickle
71
except ImportError:
72
import pickle
64
73
import multiprocessing
74
import types
75
import binascii
76
import tempfile
77
import itertools
78
import collections
79
import codecs
65
80
66
81
import dbus
67
82
import dbus.service
68
import gobject
69
import avahi
83
from gi.repository import GLib
70
84
from dbus.mainloop.glib import DBusGMainLoop
71
85
import ctypes
72
86
import ctypes.util
73
87
import xml.dom.minidom
74
88
import inspect
75
89
90
# Try to find the value of SO_BINDTODEVICE:
76
91
try:
92
# This is where SO_BINDTODEVICE is in Python 3.3 (or 3.4?) and
93
# newer, and it is also the most natural place for it:
77
94
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
78
95
except AttributeError:
79
96
try:
97
# This is where SO_BINDTODEVICE was up to and including Python
98
# 2.6, and also 3.2:
80
99
from IN import SO_BINDTODEVICE
81
100
except ImportError:
82
SO_BINDTODEVICE = None
83
84
85
version = "1.2.3"
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)
101
# In Python 2.7 it seems to have been removed entirely.
102
# Try running the C preprocessor:
103
try:
104
cc = subprocess.Popen(["cc", "--language=c", "-E",
105
"/dev/stdin"],
106
stdin=subprocess.PIPE,
107
stdout=subprocess.PIPE)
108
stdout = cc.communicate(
109
"#include <sys/socket.h>\nSO_BINDTODEVICE\n")[0]
110
SO_BINDTODEVICE = int(stdout.splitlines()[-1])
111
except (OSError, ValueError, IndexError):
112
# No value found
113
SO_BINDTODEVICE = None
114
115
if sys.version_info.major == 2:
116
str = unicode
117
118
version = "1.7.16"
119
stored_state_file = "clients.pickle"
120
121
logger = logging.getLogger()
122
syslogger = None
123
124
try:
125
if_nametoindex = ctypes.cdll.LoadLibrary(
126
ctypes.util.find_library("c")).if_nametoindex
127
except (OSError, AttributeError):
128
129
def if_nametoindex(interface):
130
"Get an interface index the hard way, i.e. using fcntl()"
131
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
132
with contextlib.closing(socket.socket()) as s:
133
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
134
struct.pack(b"16s16x", interface))
135
interface_index = struct.unpack("I", ifreq[16:20])[0]
136
return interface_index
137
138
139
def copy_function(func):
140
"""Make a copy of a function"""
141
if sys.version_info.major == 2:
142
return types.FunctionType(func.func_code,
143
func.func_globals,
144
func.func_name,
145
func.func_defaults,
146
func.func_closure)
147
else:
148
return types.FunctionType(func.__code__,
149
func.__globals__,
150
func.__name__,
151
func.__defaults__,
152
func.__closure__)
153
154
155
def initlogger(debug, level=logging.WARNING):
156
"""init logger and add loglevel"""
157
158
global syslogger
159
syslogger = (logging.handlers.SysLogHandler(
160
facility=logging.handlers.SysLogHandler.LOG_DAEMON,
161
address="/dev/log"))
162
syslogger.setFormatter(logging.Formatter
163
('Mandos [%(process)d]: %(levelname)s:'
164
' %(message)s'))
165
logger.addHandler(syslogger)
166
167
if debug:
168
console = logging.StreamHandler()
169
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
170
' [%(process)d]:'
171
' %(levelname)s:'
172
' %(message)s'))
173
logger.addHandler(console)
174
logger.setLevel(level)
175
176
177
class PGPError(Exception):
178
"""Exception if encryption/decryption fails"""
179
pass
180
181
182
class PGPEngine(object):
183
"""A simple class for OpenPGP symmetric encryption & decryption"""
184
185
def __init__(self):
186
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
187
self.gpg = "gpg"
188
try:
189
output = subprocess.check_output(["gpgconf"])
190
for line in output.splitlines():
191
name, text, path = line.split(b":")
192
if name == "gpg":
193
self.gpg = path
194
break
195
except OSError as e:
196
if e.errno != errno.ENOENT:
197
raise
198
self.gnupgargs = ['--batch',
199
'--homedir', self.tempdir,
200
'--force-mdc',
201
'--quiet']
202
# Only GPG version 1 has the --no-use-agent option.
203
if self.gpg == "gpg" or self.gpg.endswith("/gpg"):
204
self.gnupgargs.append("--no-use-agent")
205
206
def __enter__(self):
207
return self
208
209
def __exit__(self, exc_type, exc_value, traceback):
210
self._cleanup()
211
return False
212
213
def __del__(self):
214
self._cleanup()
215
216
def _cleanup(self):
217
if self.tempdir is not None:
218
# Delete contents of tempdir
219
for root, dirs, files in os.walk(self.tempdir,
220
topdown=False):
221
for filename in files:
222
os.remove(os.path.join(root, filename))
223
for dirname in dirs:
224
os.rmdir(os.path.join(root, dirname))
225
# Remove tempdir
226
os.rmdir(self.tempdir)
227
self.tempdir = None
228
229
def password_encode(self, password):
230
# Passphrase can not be empty and can not contain newlines or
231
# NUL bytes. So we prefix it and hex encode it.
232
encoded = b"mandos" + binascii.hexlify(password)
233
if len(encoded) > 2048:
234
# GnuPG can't handle long passwords, so encode differently
235
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
236
.replace(b"\n", b"\\n")
237
.replace(b"\0", b"\\x00"))
238
return encoded
239
240
def encrypt(self, data, password):
241
passphrase = self.password_encode(password)
242
with tempfile.NamedTemporaryFile(
243
dir=self.tempdir) as passfile:
244
passfile.write(passphrase)
245
passfile.flush()
246
proc = subprocess.Popen([self.gpg, '--symmetric',
247
'--passphrase-file',
248
passfile.name]
249
+ self.gnupgargs,
250
stdin=subprocess.PIPE,
251
stdout=subprocess.PIPE,
252
stderr=subprocess.PIPE)
253
ciphertext, err = proc.communicate(input=data)
254
if proc.returncode != 0:
255
raise PGPError(err)
256
return ciphertext
257
258
def decrypt(self, data, password):
259
passphrase = self.password_encode(password)
260
with tempfile.NamedTemporaryFile(
261
dir=self.tempdir) as passfile:
262
passfile.write(passphrase)
263
passfile.flush()
264
proc = subprocess.Popen([self.gpg, '--decrypt',
265
'--passphrase-file',
266
passfile.name]
267
+ self.gnupgargs,
268
stdin=subprocess.PIPE,
269
stdout=subprocess.PIPE,
270
stderr=subprocess.PIPE)
271
decrypted_plaintext, err = proc.communicate(input=data)
272
if proc.returncode != 0:
273
raise PGPError(err)
274
return decrypted_plaintext
275
276
277
# Pretend that we have an Avahi module
278
class Avahi(object):
279
"""This isn't so much a class as it is a module-like namespace.
280
It is instantiated once, and simulates having an Avahi module."""
281
IF_UNSPEC = -1 # avahi-common/address.h
282
PROTO_UNSPEC = -1 # avahi-common/address.h
283
PROTO_INET = 0 # avahi-common/address.h
284
PROTO_INET6 = 1 # avahi-common/address.h
285
DBUS_NAME = "org.freedesktop.Avahi"
286
DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"
287
DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"
288
DBUS_PATH_SERVER = "/"
289
290
def string_array_to_txt_array(self, t):
291
return dbus.Array((dbus.ByteArray(s.encode("utf-8"))
292
for s in t), signature="ay")
293
ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h
294
ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h
295
ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h
296
SERVER_INVALID = 0 # avahi-common/defs.h
297
SERVER_REGISTERING = 1 # avahi-common/defs.h
298
SERVER_RUNNING = 2 # avahi-common/defs.h
299
SERVER_COLLISION = 3 # avahi-common/defs.h
300
SERVER_FAILURE = 4 # avahi-common/defs.h
301
avahi = Avahi()
302
102
303
103
304
class AvahiError(Exception):
104
305
def __init__(self, value, *args, **kwargs):
105
306
self.value = value
106
super(AvahiError, self).__init__(value, *args, **kwargs)
107
def __unicode__(self):
108
return unicode(repr(self.value))
307
return super(AvahiError, self).__init__(value, *args,
308
**kwargs)
309
109
310
110
311
class AvahiServiceError(AvahiError):
111
312
pass
112
313
314
113
315
class AvahiGroupError(AvahiError):
114
316
pass
115
317
116
318
117
319
class AvahiService(object):
118
320
"""An Avahi (Zeroconf) service.
119
321
120
322
Attributes:
121
323
interface: integer; avahi.IF_UNSPEC or an interface index.
122
324
Used to optionally bind to the specified interface.
123
325
name: string; Example: 'Mandos'
124
326
type: string; Example: '_mandos._tcp'.
125
See <http://www.dns-sd.org/ServiceTypes.html>
327
See <https://www.iana.org/assignments/service-names-port-numbers>
126
328
port: integer; what port to announce
127
329
TXT: list of strings; TXT record for the service
128
330
domain: string; Domain to publish on, default to .local if empty.
134
336
server: D-Bus Server
135
337
bus: dbus.SystemBus()
136
338
"""
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):
339
340
def __init__(self,
341
interface=avahi.IF_UNSPEC,
342
name=None,
343
servicetype=None,
344
port=None,
345
TXT=None,
346
domain="",
347
host="",
348
max_renames=32768,
349
protocol=avahi.PROTO_UNSPEC,
350
bus=None):
141
351
self.interface = interface
142
352
self.name = name
143
353
self.type = servicetype
151
361
self.group = None # our entry group
152
362
self.server = None
153
363
self.bus = bus
154
def rename(self):
364
self.entry_group_state_changed_match = None
365
366
def rename(self, remove=True):
155
367
"""Derived from the Avahi example code"""
156
368
if self.rename_count >= self.max_renames:
157
369
logger.critical("No suitable Zeroconf service name found"
158
370
" after %i retries, exiting.",
159
371
self.rename_count)
160
372
raise AvahiServiceError("Too many renames")
161
self.name = unicode(self.server.GetAlternativeServiceName(self.name))
373
self.name = str(
374
self.server.GetAlternativeServiceName(self.name))
375
self.rename_count += 1
162
376
logger.info("Changing Zeroconf service name to %r ...",
163
377
self.name)
164
syslogger.setFormatter(logging.Formatter
165
('Mandos (%s) [%%(process)d]:'
166
' %%(levelname)s: %%(message)s'
167
% self.name))
168
self.remove()
378
if remove:
379
self.remove()
169
380
try:
170
381
self.add()
171
except dbus.exceptions.DBusException, error:
172
logger.critical("DBusException: %s", error)
173
self.cleanup()
174
os._exit(1)
175
self.rename_count += 1
382
except dbus.exceptions.DBusException as error:
383
if (error.get_dbus_name()
384
== "org.freedesktop.Avahi.CollisionError"):
385
logger.info("Local Zeroconf service name collision.")
386
return self.rename(remove=False)
387
else:
388
logger.critical("D-Bus Exception", exc_info=error)
389
self.cleanup()
390
os._exit(1)
391
176
392
def remove(self):
177
393
"""Derived from the Avahi example code"""
394
if self.entry_group_state_changed_match is not None:
395
self.entry_group_state_changed_match.remove()
396
self.entry_group_state_changed_match = None
178
397
if self.group is not None:
179
398
self.group.Reset()
399
180
400
def add(self):
181
401
"""Derived from the Avahi example code"""
402
self.remove()
182
403
if self.group is None:
183
404
self.group = dbus.Interface(
184
405
self.bus.get_object(avahi.DBUS_NAME,
185
406
self.server.EntryGroupNew()),
186
407
avahi.DBUS_INTERFACE_ENTRY_GROUP)
187
self.group.connect_to_signal('StateChanged',
188
self
189
.entry_group_state_changed)
408
self.entry_group_state_changed_match = (
409
self.group.connect_to_signal(
410
'StateChanged', self.entry_group_state_changed))
190
411
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
191
412
self.name, self.type)
192
413
self.group.AddService(
198
419
dbus.UInt16(self.port),
199
420
avahi.string_array_to_txt_array(self.TXT))
200
421
self.group.Commit()
422
201
423
def entry_group_state_changed(self, state, error):
202
424
"""Derived from the Avahi example code"""
203
425
logger.debug("Avahi entry group state change: %i", state)
204
426
205
427
if state == avahi.ENTRY_GROUP_ESTABLISHED:
206
428
logger.debug("Zeroconf service established.")
207
429
elif state == avahi.ENTRY_GROUP_COLLISION:
209
431
self.rename()
210
432
elif state == avahi.ENTRY_GROUP_FAILURE:
211
433
logger.critical("Avahi: Error in group state changed %s",
212
unicode(error))
213
raise AvahiGroupError("State changed: %s"
214
% unicode(error))
434
str(error))
435
raise AvahiGroupError("State changed: {!s}".format(error))
436
215
437
def cleanup(self):
216
438
"""Derived from the Avahi example code"""
217
439
if self.group is not None:
218
self.group.Free()
440
try:
441
self.group.Free()
442
except (dbus.exceptions.UnknownMethodException,
443
dbus.exceptions.DBusException):
444
pass
219
445
self.group = None
220
def server_state_changed(self, state):
446
self.remove()
447
448
def server_state_changed(self, state, error=None):
221
449
"""Derived from the Avahi example code"""
222
450
logger.debug("Avahi server state change: %i", state)
223
if state == avahi.SERVER_COLLISION:
224
logger.error("Zeroconf server name collision")
225
self.remove()
451
bad_states = {
452
avahi.SERVER_INVALID: "Zeroconf server invalid",
453
avahi.SERVER_REGISTERING: None,
454
avahi.SERVER_COLLISION: "Zeroconf server name collision",
455
avahi.SERVER_FAILURE: "Zeroconf server failure",
456
}
457
if state in bad_states:
458
if bad_states[state] is not None:
459
if error is None:
460
logger.error(bad_states[state])
461
else:
462
logger.error(bad_states[state] + ": %r", error)
463
self.cleanup()
226
464
elif state == avahi.SERVER_RUNNING:
227
self.add()
465
try:
466
self.add()
467
except dbus.exceptions.DBusException as error:
468
if (error.get_dbus_name()
469
== "org.freedesktop.Avahi.CollisionError"):
470
logger.info("Local Zeroconf service name"
471
" collision.")
472
return self.rename(remove=False)
473
else:
474
logger.critical("D-Bus Exception", exc_info=error)
475
self.cleanup()
476
os._exit(1)
477
else:
478
if error is None:
479
logger.debug("Unknown state: %r", state)
480
else:
481
logger.debug("Unknown state: %r: %r", state, error)
482
228
483
def activate(self):
229
484
"""Derived from the Avahi example code"""
230
485
if self.server is None:
231
486
self.server = dbus.Interface(
232
487
self.bus.get_object(avahi.DBUS_NAME,
233
avahi.DBUS_PATH_SERVER),
488
avahi.DBUS_PATH_SERVER,
489
follow_name_owner_changes=True),
234
490
avahi.DBUS_INTERFACE_SERVER)
235
491
self.server.connect_to_signal("StateChanged",
236
self.server_state_changed)
492
self.server_state_changed)
237
493
self.server_state_changed(self.server.GetState())
238
494
239
495
496
class AvahiServiceToSyslog(AvahiService):
497
def rename(self, *args, **kwargs):
498
"""Add the new name to the syslog messages"""
499
ret = super(AvahiServiceToSyslog, self).rename(self, *args,
500
**kwargs)
501
syslogger.setFormatter(logging.Formatter(
502
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
503
.format(self.name)))
504
return ret
505
506
507
# Pretend that we have a GnuTLS module
508
class GnuTLS(object):
509
"""This isn't so much a class as it is a module-like namespace.
510
It is instantiated once, and simulates having a GnuTLS module."""
511
512
library = ctypes.util.find_library("gnutls")
513
if library is None:
514
library = ctypes.util.find_library("gnutls-deb0")
515
_library = ctypes.cdll.LoadLibrary(library)
516
del library
517
_need_version = b"3.3.0"
518
519
def __init__(self):
520
# Need to use "self" here, since this method is called before
521
# the assignment to the "gnutls" global variable happens.
522
if self.check_version(self._need_version) is None:
523
raise self.Error("Needs GnuTLS {} or later"
524
.format(self._need_version))
525
526
# Unless otherwise indicated, the constants and types below are
527
# all from the gnutls/gnutls.h C header file.
528
529
# Constants
530
E_SUCCESS = 0
531
E_INTERRUPTED = -52
532
E_AGAIN = -28
533
CRT_OPENPGP = 2
534
CLIENT = 2
535
SHUT_RDWR = 0
536
CRD_CERTIFICATE = 1
537
E_NO_CERTIFICATE_FOUND = -49
538
OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
539
540
# Types
541
class session_int(ctypes.Structure):
542
_fields_ = []
543
session_t = ctypes.POINTER(session_int)
544
545
class certificate_credentials_st(ctypes.Structure):
546
_fields_ = []
547
certificate_credentials_t = ctypes.POINTER(
548
certificate_credentials_st)
549
certificate_type_t = ctypes.c_int
550
551
class datum_t(ctypes.Structure):
552
_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
553
('size', ctypes.c_uint)]
554
555
class openpgp_crt_int(ctypes.Structure):
556
_fields_ = []
557
openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
558
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
559
log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
560
credentials_type_t = ctypes.c_int
561
transport_ptr_t = ctypes.c_void_p
562
close_request_t = ctypes.c_int
563
564
# Exceptions
565
class Error(Exception):
566
# We need to use the class name "GnuTLS" here, since this
567
# exception might be raised from within GnuTLS.__init__,
568
# which is called before the assignment to the "gnutls"
569
# global variable has happened.
570
def __init__(self, message=None, code=None, args=()):
571
# Default usage is by a message string, but if a return
572
# code is passed, convert it to a string with
573
# gnutls.strerror()
574
self.code = code
575
if message is None and code is not None:
576
message = GnuTLS.strerror(code)
577
return super(GnuTLS.Error, self).__init__(
578
message, *args)
579
580
class CertificateSecurityError(Error):
581
pass
582
583
# Classes
584
class Credentials(object):
585
def __init__(self):
586
self._c_object = gnutls.certificate_credentials_t()
587
gnutls.certificate_allocate_credentials(
588
ctypes.byref(self._c_object))
589
self.type = gnutls.CRD_CERTIFICATE
590
591
def __del__(self):
592
gnutls.certificate_free_credentials(self._c_object)
593
594
class ClientSession(object):
595
def __init__(self, socket, credentials=None):
596
self._c_object = gnutls.session_t()
597
gnutls.init(ctypes.byref(self._c_object), gnutls.CLIENT)
598
gnutls.set_default_priority(self._c_object)
599
gnutls.transport_set_ptr(self._c_object, socket.fileno())
600
gnutls.handshake_set_private_extensions(self._c_object,
601
True)
602
self.socket = socket
603
if credentials is None:
604
credentials = gnutls.Credentials()
605
gnutls.credentials_set(self._c_object, credentials.type,
606
ctypes.cast(credentials._c_object,
607
ctypes.c_void_p))
608
self.credentials = credentials
609
610
def __del__(self):
611
gnutls.deinit(self._c_object)
612
613
def handshake(self):
614
return gnutls.handshake(self._c_object)
615
616
def send(self, data):
617
data = bytes(data)
618
data_len = len(data)
619
while data_len > 0:
620
data_len -= gnutls.record_send(self._c_object,
621
data[-data_len:],
622
data_len)
623
624
def bye(self):
625
return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
626
627
# Error handling functions
628
def _error_code(result):
629
"""A function to raise exceptions on errors, suitable
630
for the 'restype' attribute on ctypes functions"""
631
if result >= 0:
632
return result
633
if result == gnutls.E_NO_CERTIFICATE_FOUND:
634
raise gnutls.CertificateSecurityError(code=result)
635
raise gnutls.Error(code=result)
636
637
def _retry_on_error(result, func, arguments):
638
"""A function to retry on some errors, suitable
639
for the 'errcheck' attribute on ctypes functions"""
640
while result < 0:
641
if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
642
return _error_code(result)
643
result = func(*arguments)
644
return result
645
646
# Unless otherwise indicated, the function declarations below are
647
# all from the gnutls/gnutls.h C header file.
648
649
# Functions
650
priority_set_direct = _library.gnutls_priority_set_direct
651
priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
652
ctypes.POINTER(ctypes.c_char_p)]
653
priority_set_direct.restype = _error_code
654
655
init = _library.gnutls_init
656
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
657
init.restype = _error_code
658
659
set_default_priority = _library.gnutls_set_default_priority
660
set_default_priority.argtypes = [session_t]
661
set_default_priority.restype = _error_code
662
663
record_send = _library.gnutls_record_send
664
record_send.argtypes = [session_t, ctypes.c_void_p,
665
ctypes.c_size_t]
666
record_send.restype = ctypes.c_ssize_t
667
record_send.errcheck = _retry_on_error
668
669
certificate_allocate_credentials = (
670
_library.gnutls_certificate_allocate_credentials)
671
certificate_allocate_credentials.argtypes = [
672
ctypes.POINTER(certificate_credentials_t)]
673
certificate_allocate_credentials.restype = _error_code
674
675
certificate_free_credentials = (
676
_library.gnutls_certificate_free_credentials)
677
certificate_free_credentials.argtypes = [
678
certificate_credentials_t]
679
certificate_free_credentials.restype = None
680
681
handshake_set_private_extensions = (
682
_library.gnutls_handshake_set_private_extensions)
683
handshake_set_private_extensions.argtypes = [session_t,
684
ctypes.c_int]
685
handshake_set_private_extensions.restype = None
686
687
credentials_set = _library.gnutls_credentials_set
688
credentials_set.argtypes = [session_t, credentials_type_t,
689
ctypes.c_void_p]
690
credentials_set.restype = _error_code
691
692
strerror = _library.gnutls_strerror
693
strerror.argtypes = [ctypes.c_int]
694
strerror.restype = ctypes.c_char_p
695
696
certificate_type_get = _library.gnutls_certificate_type_get
697
certificate_type_get.argtypes = [session_t]
698
certificate_type_get.restype = _error_code
699
700
certificate_get_peers = _library.gnutls_certificate_get_peers
701
certificate_get_peers.argtypes = [session_t,
702
ctypes.POINTER(ctypes.c_uint)]
703
certificate_get_peers.restype = ctypes.POINTER(datum_t)
704
705
global_set_log_level = _library.gnutls_global_set_log_level
706
global_set_log_level.argtypes = [ctypes.c_int]
707
global_set_log_level.restype = None
708
709
global_set_log_function = _library.gnutls_global_set_log_function
710
global_set_log_function.argtypes = [log_func]
711
global_set_log_function.restype = None
712
713
deinit = _library.gnutls_deinit
714
deinit.argtypes = [session_t]
715
deinit.restype = None
716
717
handshake = _library.gnutls_handshake
718
handshake.argtypes = [session_t]
719
handshake.restype = _error_code
720
handshake.errcheck = _retry_on_error
721
722
transport_set_ptr = _library.gnutls_transport_set_ptr
723
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
724
transport_set_ptr.restype = None
725
726
bye = _library.gnutls_bye
727
bye.argtypes = [session_t, close_request_t]
728
bye.restype = _error_code
729
bye.errcheck = _retry_on_error
730
731
check_version = _library.gnutls_check_version
732
check_version.argtypes = [ctypes.c_char_p]
733
check_version.restype = ctypes.c_char_p
734
735
# All the function declarations below are from gnutls/openpgp.h
736
737
openpgp_crt_init = _library.gnutls_openpgp_crt_init
738
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
739
openpgp_crt_init.restype = _error_code
740
741
openpgp_crt_import = _library.gnutls_openpgp_crt_import
742
openpgp_crt_import.argtypes = [openpgp_crt_t,
743
ctypes.POINTER(datum_t),
744
openpgp_crt_fmt_t]
745
openpgp_crt_import.restype = _error_code
746
747
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
748
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
749
ctypes.POINTER(ctypes.c_uint)]
750
openpgp_crt_verify_self.restype = _error_code
751
752
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
753
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
754
openpgp_crt_deinit.restype = None
755
756
openpgp_crt_get_fingerprint = (
757
_library.gnutls_openpgp_crt_get_fingerprint)
758
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
759
ctypes.c_void_p,
760
ctypes.POINTER(
761
ctypes.c_size_t)]
762
openpgp_crt_get_fingerprint.restype = _error_code
763
764
# Remove non-public functions
765
del _error_code, _retry_on_error
766
# Create the global "gnutls" object, simulating a module
767
gnutls = GnuTLS()
768
769
770
def call_pipe(connection, # : multiprocessing.Connection
771
func, *args, **kwargs):
772
"""This function is meant to be called by multiprocessing.Process
773
774
This function runs func(*args, **kwargs), and writes the resulting
775
return value on the provided multiprocessing.Connection.
776
"""
777
connection.send(func(*args, **kwargs))
778
connection.close()
779
780
240
781
class Client(object):
241
782
"""A representation of a client host served by this server.
242
783
243
784
Attributes:
244
_approved: bool(); 'None' if not yet approved/disapproved
785
approved: bool(); 'None' if not yet approved/disapproved
245
786
approval_delay: datetime.timedelta(); Time to wait for approval
246
787
approval_duration: datetime.timedelta(); Duration of one approval
247
788
checker: subprocess.Popen(); a running checker process used
248
789
to see if the client lives.
249
790
'None' if no process is running.
250
checker_callback_tag: a gobject event source tag, or None
791
checker_callback_tag: a GLib event source tag, or None
251
792
checker_command: string; External command which is run to check
252
793
if client lives. %() expansions are done at
253
794
runtime with vars(self) as dict, so that for
254
795
instance %(name)s can be used in the command.
255
checker_initiator_tag: a gobject event source tag, or None
796
checker_initiator_tag: a GLib event source tag, or None
256
797
created: datetime.datetime(); (UTC) object creation
798
client_structure: Object describing what attributes a client has
799
and is used for storing the client at exit
257
800
current_checker_command: string; current running checker_command
258
disable_hook: If set, called by disable() as disable_hook(self)
259
disable_initiator_tag: a gobject event source tag, or None
801
disable_initiator_tag: a GLib event source tag, or None
260
802
enabled: bool()
261
803
fingerprint: string (40 or 32 hexadecimal digits); used to
262
804
uniquely identify the client
264
806
interval: datetime.timedelta(); How often to start a new checker
265
807
last_approval_request: datetime.datetime(); (UTC) or None
266
808
last_checked_ok: datetime.datetime(); (UTC) or None
267
last_enabled: datetime.datetime(); (UTC)
809
last_checker_status: integer between 0 and 255 reflecting exit
810
status of last checker. -1 reflects crashed
811
checker, -2 means no checker completed yet.
812
last_checker_signal: The signal which killed the last checker, if
813
last_checker_status is -1
814
last_enabled: datetime.datetime(); (UTC) or None
268
815
name: string; from the config file, used in log messages and
269
816
D-Bus identifiers
270
817
secret: bytestring; sent verbatim (over TLS) to client
271
818
timeout: datetime.timedelta(); How long from last_checked_ok
272
819
until this client is disabled
820
extended_timeout: extra long timeout when secret has been sent
273
821
runtime_expansions: Allowed attributes for runtime expansion.
822
expires: datetime.datetime(); time (UTC) when a client will be
823
disabled, or None
824
server_settings: The server_settings dict from main()
274
825
"""
275
826
276
827
runtime_expansions = ("approval_delay", "approval_duration",
277
"created", "enabled", "fingerprint",
278
"host", "interval", "last_checked_ok",
828
"created", "enabled", "expires",
829
"fingerprint", "host", "interval",
830
"last_approval_request", "last_checked_ok",
279
831
"last_enabled", "name", "timeout")
280
832
client_defaults = {
833
"timeout": "PT5M",
834
"extended_timeout": "PT15M",
835
"interval": "PT2M",
836
"checker": "fping -q -- %%(host)s",
837
"host": "",
838
"approval_delay": "PT0S",
839
"approval_duration": "PT1S",
840
"approved_by_default": "True",
841
"enabled": "True",
842
}
843
281
844
@staticmethod
282
def _timedelta_to_milliseconds(td):
283
"Convert a datetime.timedelta() to milliseconds"
284
return ((td.days * 24 * 60 * 60 * 1000)
285
+ (td.seconds * 1000)
286
+ (td.microseconds // 1000))
287
288
def timeout_milliseconds(self):
289
"Return the 'timeout' attribute in milliseconds"
290
return self._timedelta_to_milliseconds(self.timeout)
291
292
def interval_milliseconds(self):
293
"Return the 'interval' attribute in milliseconds"
294
return self._timedelta_to_milliseconds(self.interval)
295
296
def approval_delay_milliseconds(self):
297
return self._timedelta_to_milliseconds(self.approval_delay)
298
299
def __init__(self, name = None, disable_hook=None, config=None):
300
"""Note: the 'checker' key in 'config' sets the
301
'checker_command' attribute and *not* the 'checker'
302
attribute."""
845
def config_parser(config):
846
"""Construct a new dict of client settings of this form:
847
{ client_name: {setting_name: value, ...}, ...}
848
with exceptions for any special settings as defined above.
849
NOTE: Must be a pure function. Must return the same result
850
value given the same arguments.
851
"""
852
settings = {}
853
for client_name in config.sections():
854
section = dict(config.items(client_name))
855
client = settings[client_name] = {}
856
857
client["host"] = section["host"]
858
# Reformat values from string types to Python types
859
client["approved_by_default"] = config.getboolean(
860
client_name, "approved_by_default")
861
client["enabled"] = config.getboolean(client_name,
862
"enabled")
863
864
# Uppercase and remove spaces from fingerprint for later
865
# comparison purposes with return value from the
866
# fingerprint() function
867
client["fingerprint"] = (section["fingerprint"].upper()
868
.replace(" ", ""))
869
if "secret" in section:
870
client["secret"] = codecs.decode(section["secret"]
871
.encode("utf-8"),
872
"base64")
873
elif "secfile" in section:
874
with open(os.path.expanduser(os.path.expandvars
875
(section["secfile"])),
876
"rb") as secfile:
877
client["secret"] = secfile.read()
878
else:
879
raise TypeError("No secret or secfile for section {}"
880
.format(section))
881
client["timeout"] = string_to_delta(section["timeout"])
882
client["extended_timeout"] = string_to_delta(
883
section["extended_timeout"])
884
client["interval"] = string_to_delta(section["interval"])
885
client["approval_delay"] = string_to_delta(
886
section["approval_delay"])
887
client["approval_duration"] = string_to_delta(
888
section["approval_duration"])
889
client["checker_command"] = section["checker"]
890
client["last_approval_request"] = None
891
client["last_checked_ok"] = None
892
client["last_checker_status"] = -2
893
894
return settings
895
896
def __init__(self, settings, name=None, server_settings=None):
303
897
self.name = name
304
if config is None:
305
config = {}
898
if server_settings is None:
899
server_settings = {}
900
self.server_settings = server_settings
901
# adding all client settings
902
for setting, value in settings.items():
903
setattr(self, setting, value)
904
905
if self.enabled:
906
if not hasattr(self, "last_enabled"):
907
self.last_enabled = datetime.datetime.utcnow()
908
if not hasattr(self, "expires"):
909
self.expires = (datetime.datetime.utcnow()
910
+ self.timeout)
911
else:
912
self.last_enabled = None
913
self.expires = None
914
306
915
logger.debug("Creating client %r", self.name)
307
# Uppercase and remove spaces from fingerprint for later
308
# comparison purposes with return value from the fingerprint()
309
# function
310
self.fingerprint = (config["fingerprint"].upper()
311
.replace(" ", ""))
312
916
logger.debug(" Fingerprint: %s", self.fingerprint)
313
if "secret" in config:
314
self.secret = config["secret"].decode("base64")
315
elif "secfile" in config:
316
with open(os.path.expanduser(os.path.expandvars
317
(config["secfile"])),
318
"rb") as secfile:
319
self.secret = secfile.read()
320
else:
321
raise TypeError("No secret or secfile for client %s"
322
% self.name)
323
self.host = config.get("host", "")
324
self.created = datetime.datetime.utcnow()
325
self.enabled = False
326
self.last_approval_request = None
327
self.last_enabled = None
328
self.last_checked_ok = None
329
self.timeout = string_to_delta(config["timeout"])
330
self.interval = string_to_delta(config["interval"])
331
self.disable_hook = disable_hook
917
self.created = settings.get("created",
918
datetime.datetime.utcnow())
919
920
# attributes specific for this server instance
332
921
self.checker = None
333
922
self.checker_initiator_tag = None
334
923
self.disable_initiator_tag = None
335
924
self.checker_callback_tag = None
336
self.checker_command = config["checker"]
337
925
self.current_checker_command = None
338
self.last_connect = None
339
self._approved = None
340
self.approved_by_default = config.get("approved_by_default",
341
True)
926
self.approved = None
342
927
self.approvals_pending = 0
343
self.approval_delay = string_to_delta(
344
config["approval_delay"])
345
self.approval_duration = string_to_delta(
346
config["approval_duration"])
347
self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())
348
928
self.changedstate = multiprocessing_manager.Condition(
929
multiprocessing_manager.Lock())
930
self.client_structure = [attr
931
for attr in self.__dict__.keys()
932
if not attr.startswith("_")]
933
self.client_structure.append("client_structure")
934
935
for name, t in inspect.getmembers(
936
type(self), lambda obj: isinstance(obj, property)):
937
if not name.startswith("_"):
938
self.client_structure.append(name)
939
940
# Send notice to process children that client state has changed
349
941
def send_changedstate(self):
350
self.changedstate.acquire()
351
self.changedstate.notify_all()
352
self.changedstate.release()
353
942
with self.changedstate:
943
self.changedstate.notify_all()
944
354
945
def enable(self):
355
946
"""Start this client's checker and timeout hooks"""
356
947
if getattr(self, "enabled", False):
357
948
# Already enabled
358
949
return
359
self.send_changedstate()
950
self.expires = datetime.datetime.utcnow() + self.timeout
951
self.enabled = True
360
952
self.last_enabled = datetime.datetime.utcnow()
361
# Schedule a new checker to be started an 'interval' from now,
362
# and every interval from then on.
363
self.checker_initiator_tag = (gobject.timeout_add
364
(self.interval_milliseconds(),
365
self.start_checker))
366
# Schedule a disable() when 'timeout' has passed
367
self.disable_initiator_tag = (gobject.timeout_add
368
(self.timeout_milliseconds(),
369
self.disable))
370
self.enabled = True
371
# Also start a new checker *right now*.
372
self.start_checker()
373
953
self.init_checker()
954
self.send_changedstate()
955
374
956
def disable(self, quiet=True):
375
957
"""Disable this client."""
376
958
if not getattr(self, "enabled", False):
377
959
return False
378
960
if not quiet:
379
self.send_changedstate()
380
if not quiet:
381
961
logger.info("Disabling client %s", self.name)
382
if getattr(self, "disable_initiator_tag", False):
383
gobject.source_remove(self.disable_initiator_tag)
962
if getattr(self, "disable_initiator_tag", None) is not None:
963
GLib.source_remove(self.disable_initiator_tag)
384
964
self.disable_initiator_tag = None
385
if getattr(self, "checker_initiator_tag", False):
386
gobject.source_remove(self.checker_initiator_tag)
965
self.expires = None
966
if getattr(self, "checker_initiator_tag", None) is not None:
967
GLib.source_remove(self.checker_initiator_tag)
387
968
self.checker_initiator_tag = None
388
969
self.stop_checker()
389
if self.disable_hook:
390
self.disable_hook(self)
391
970
self.enabled = False
392
# Do not run this again if called by a gobject.timeout_add
971
if not quiet:
972
self.send_changedstate()
973
# Do not run this again if called by a GLib.timeout_add
393
974
return False
394
975
395
976
def __del__(self):
396
self.disable_hook = None
397
977
self.disable()
398
399
def checker_callback(self, pid, condition, command):
978
979
def init_checker(self):
980
# Schedule a new checker to be started an 'interval' from now,
981
# and every interval from then on.
982
if self.checker_initiator_tag is not None:
983
GLib.source_remove(self.checker_initiator_tag)
984
self.checker_initiator_tag = GLib.timeout_add(
985
int(self.interval.total_seconds() * 1000),
986
self.start_checker)
987
# Schedule a disable() when 'timeout' has passed
988
if self.disable_initiator_tag is not None:
989
GLib.source_remove(self.disable_initiator_tag)
990
self.disable_initiator_tag = GLib.timeout_add(
991
int(self.timeout.total_seconds() * 1000), self.disable)
992
# Also start a new checker *right now*.
993
self.start_checker()
994
995
def checker_callback(self, source, condition, connection,
996
command):
400
997
"""The checker has completed, so take appropriate actions."""
401
998
self.checker_callback_tag = None
402
999
self.checker = None
403
if os.WIFEXITED(condition):
404
exitstatus = os.WEXITSTATUS(condition)
405
if exitstatus == 0:
1000
# Read return code from connection (see call_pipe)
1001
returncode = connection.recv()
1002
connection.close()
1003
1004
if returncode >= 0:
1005
self.last_checker_status = returncode
1006
self.last_checker_signal = None
1007
if self.last_checker_status == 0:
406
1008
logger.info("Checker for %(name)s succeeded",
407
1009
vars(self))
408
1010
self.checked_ok()
409
1011
else:
410
logger.info("Checker for %(name)s failed",
411
vars(self))
1012
logger.info("Checker for %(name)s failed", vars(self))
412
1013
else:
1014
self.last_checker_status = -1
1015
self.last_checker_signal = -returncode
413
1016
logger.warning("Checker for %(name)s crashed?",
414
1017
vars(self))
415
1018
return False
1019
416
1020
def checked_ok(self):
417
"""Bump up the timeout for this client.
418
419
This should only be called when the client has been seen,
420
alive and well.
421
"""
1021
"""Assert that the client has been seen, alive and well."""
422
1022
self.last_checked_ok = datetime.datetime.utcnow()
423
gobject.source_remove(self.disable_initiator_tag)
424
self.disable_initiator_tag = (gobject.timeout_add
425
(self.timeout_milliseconds(),
426
self.disable))
427
1023
self.last_checker_status = 0
1024
self.last_checker_signal = None
1025
self.bump_timeout()
1026
1027
def bump_timeout(self, timeout=None):
1028
"""Bump up the timeout for this client."""
1029
if timeout is None:
1030
timeout = self.timeout
1031
if self.disable_initiator_tag is not None:
1032
GLib.source_remove(self.disable_initiator_tag)
1033
self.disable_initiator_tag = None
1034
if getattr(self, "enabled", False):
1035
self.disable_initiator_tag = GLib.timeout_add(
1036
int(timeout.total_seconds() * 1000), self.disable)
1037
self.expires = datetime.datetime.utcnow() + timeout
1038
428
1039
def need_approval(self):
429
1040
self.last_approval_request = datetime.datetime.utcnow()
430
1041
431
1042
def start_checker(self):
432
1043
"""Start a new checker subprocess if one is not running.
433
1044
434
1045
If a checker already exists, leave it running and do
435
1046
nothing."""
436
1047
# The reason for not killing a running checker is that if we
437
# did that, then if a checker (for some reason) started
438
# running slowly and taking more than 'interval' time, the
439
# client would inevitably timeout, since no checker would get
440
# a chance to run to completion. If we instead leave running
1048
# did that, and if a checker (for some reason) started running
1049
# slowly and taking more than 'interval' time, then the client
1050
# would inevitably timeout, since no checker would get a
1051
# chance to run to completion. If we instead leave running
441
1052
# checkers alone, the checker would have to take more time
442
1053
# than 'timeout' for the client to be disabled, which is as it
443
1054
# should be.
444
445
# If a checker exists, make sure it is not a zombie
446
try:
447
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
448
except (AttributeError, OSError), error:
449
if (isinstance(error, OSError)
450
and error.errno != errno.ECHILD):
451
raise error
452
else:
453
if pid:
454
logger.warning("Checker was a zombie")
455
gobject.source_remove(self.checker_callback_tag)
456
self.checker_callback(pid, status,
457
self.current_checker_command)
1055
1056
if self.checker is not None and not self.checker.is_alive():
1057
logger.warning("Checker was not alive; joining")
1058
self.checker.join()
1059
self.checker = None
458
1060
# Start a new checker if needed
459
1061
if self.checker is None:
1062
# Escape attributes for the shell
1063
escaped_attrs = {
1064
attr: re.escape(str(getattr(self, attr)))
1065
for attr in self.runtime_expansions}
460
1066
try:
461
# In case checker_command has exactly one % operator
462
command = self.checker_command % self.host
463
except TypeError:
464
# Escape attributes for the shell
465
escaped_attrs = dict(
466
(attr,
467
re.escape(unicode(str(getattr(self, attr, "")),
468
errors=
469
'replace')))
470
for attr in
471
self.runtime_expansions)
472
473
try:
474
command = self.checker_command % escaped_attrs
475
except TypeError, error:
476
logger.error('Could not format string "%s":'
477
' %s', self.checker_command, error)
478
return True # Try again later
1067
command = self.checker_command % escaped_attrs
1068
except TypeError as error:
1069
logger.error('Could not format string "%s"',
1070
self.checker_command,
1071
exc_info=error)
1072
return True # Try again later
479
1073
self.current_checker_command = command
480
try:
481
logger.info("Starting checker %r for %s",
482
command, self.name)
483
# We don't need to redirect stdout and stderr, since
484
# in normal mode, that is already done by daemon(),
485
# and in debug mode we don't want to. (Stdin is
486
# always replaced by /dev/null.)
487
self.checker = subprocess.Popen(command,
488
close_fds=True,
489
shell=True, cwd="/")
490
self.checker_callback_tag = (gobject.child_watch_add
491
(self.checker.pid,
492
self.checker_callback,
493
data=command))
494
# The checker may have completed before the gobject
495
# watch was added. Check for this.
496
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
497
if pid:
498
gobject.source_remove(self.checker_callback_tag)
499
self.checker_callback(pid, status, command)
500
except OSError, error:
501
logger.error("Failed to start subprocess: %s",
502
error)
503
# Re-run this periodically if run by gobject.timeout_add
1074
logger.info("Starting checker %r for %s", command,
1075
self.name)
1076
# We don't need to redirect stdout and stderr, since
1077
# in normal mode, that is already done by daemon(),
1078
# and in debug mode we don't want to. (Stdin is
1079
# always replaced by /dev/null.)
1080
# The exception is when not debugging but nevertheless
1081
# running in the foreground; use the previously
1082
# created wnull.
1083
popen_args = {"close_fds": True,
1084
"shell": True,
1085
"cwd": "/"}
1086
if (not self.server_settings["debug"]
1087
and self.server_settings["foreground"]):
1088
popen_args.update({"stdout": wnull,
1089
"stderr": wnull})
1090
pipe = multiprocessing.Pipe(duplex=False)
1091
self.checker = multiprocessing.Process(
1092
target=call_pipe,
1093
args=(pipe[1], subprocess.call, command),
1094
kwargs=popen_args)
1095
self.checker.start()
1096
self.checker_callback_tag = GLib.io_add_watch(
1097
pipe[0].fileno(), GLib.IO_IN,
1098
self.checker_callback, pipe[0], command)
1099
# Re-run this periodically if run by GLib.timeout_add
504
1100
return True
505
1101
506
1102
def stop_checker(self):
507
1103
"""Force the checker process, if any, to stop."""
508
1104
if self.checker_callback_tag:
509
gobject.source_remove(self.checker_callback_tag)
1105
GLib.source_remove(self.checker_callback_tag)
510
1106
self.checker_callback_tag = None
511
1107
if getattr(self, "checker", None) is None:
512
1108
return
513
1109
logger.debug("Stopping checker for %(name)s", vars(self))
514
try:
515
os.kill(self.checker.pid, signal.SIGTERM)
516
#time.sleep(0.5)
517
#if self.checker.poll() is None:
518
# os.kill(self.checker.pid, signal.SIGKILL)
519
except OSError, error:
520
if error.errno != errno.ESRCH: # No such process
521
raise
1110
self.checker.terminate()
522
1111
self.checker = None
523
1112
524
def dbus_service_property(dbus_interface, signature="v",
525
access="readwrite", byte_arrays=False):
1113
1114
def dbus_service_property(dbus_interface,
1115
signature="v",
1116
access="readwrite",
1117
byte_arrays=False):
526
1118
"""Decorators for marking methods of a DBusObjectWithProperties to
527
1119
become properties on the D-Bus.
528
1120
529
1121
The decorated method will be called with no arguments by "Get"
530
1122
and with one argument by "Set".
531
1123
532
1124
The parameters, where they are supported, are the same as
533
1125
dbus.service.method, except there is only "signature", since the
534
1126
type from Get() and the type sent to Set() is the same.
537
1129
# "Set" method, so we fail early here:
538
1130
if byte_arrays and signature != "ay":
539
1131
raise ValueError("Byte arrays not supported for non-'ay'"
540
" signature %r" % signature)
1132
" signature {!r}".format(signature))
1133
541
1134
def decorator(func):
542
1135
func._dbus_is_property = True
543
1136
func._dbus_interface = dbus_interface
546
1139
func._dbus_name = func.__name__
547
1140
if func._dbus_name.endswith("_dbus_property"):
548
1141
func._dbus_name = func._dbus_name[:-14]
549
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
550
return func
1142
func._dbus_get_args_options = {'byte_arrays': byte_arrays}
1143
return func
1144
1145
return decorator
1146
1147
1148
def dbus_interface_annotations(dbus_interface):
1149
"""Decorator for marking functions returning interface annotations
1150
1151
Usage:
1152
1153
@dbus_interface_annotations("org.example.Interface")
1154
def _foo(self): # Function name does not matter
1155
return {"org.freedesktop.DBus.Deprecated": "true",
1156
"org.freedesktop.DBus.Property.EmitsChangedSignal":
1157
"false"}
1158
"""
1159
1160
def decorator(func):
1161
func._dbus_is_interface = True
1162
func._dbus_interface = dbus_interface
1163
func._dbus_name = dbus_interface
1164
return func
1165
1166
return decorator
1167
1168
1169
def dbus_annotations(annotations):
1170
"""Decorator to annotate D-Bus methods, signals or properties
1171
Usage:
1172
1173
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
1174
"org.freedesktop.DBus.Property."
1175
"EmitsChangedSignal": "false"})
1176
@dbus_service_property("org.example.Interface", signature="b",
1177
access="r")
1178
def Property_dbus_property(self):
1179
return dbus.Boolean(False)
1180
1181
See also the DBusObjectWithAnnotations class.
1182
"""
1183
1184
def decorator(func):
1185
func._dbus_annotations = annotations
1186
return func
1187
551
1188
return decorator
552
1189
553
1190
554
1191
class DBusPropertyException(dbus.exceptions.DBusException):
555
1192
"""A base class for D-Bus property-related exceptions
556
1193
"""
557
def __unicode__(self):
558
return unicode(str(self))
1194
pass
559
1195
560
1196
561
1197
class DBusPropertyAccessException(DBusPropertyException):
570
1206
pass
571
1207
572
1208
573
class DBusObjectWithProperties(dbus.service.Object):
1209
class DBusObjectWithAnnotations(dbus.service.Object):
1210
"""A D-Bus object with annotations.
1211
1212
Classes inheriting from this can use the dbus_annotations
1213
decorator to add annotations to methods or signals.
1214
"""
1215
1216
@staticmethod
1217
def _is_dbus_thing(thing):
1218
"""Returns a function testing if an attribute is a D-Bus thing
1219
1220
If called like _is_dbus_thing("method") it returns a function
1221
suitable for use as predicate to inspect.getmembers().
1222
"""
1223
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
1224
False)
1225
1226
def _get_all_dbus_things(self, thing):
1227
"""Returns a generator of (name, attribute) pairs
1228
"""
1229
return ((getattr(athing.__get__(self), "_dbus_name", name),
1230
athing.__get__(self))
1231
for cls in self.__class__.__mro__
1232
for name, athing in
1233
inspect.getmembers(cls, self._is_dbus_thing(thing)))
1234
1235
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1236
out_signature="s",
1237
path_keyword='object_path',
1238
connection_keyword='connection')
1239
def Introspect(self, object_path, connection):
1240
"""Overloading of standard D-Bus method.
1241
1242
Inserts annotation tags on methods and signals.
1243
"""
1244
xmlstring = dbus.service.Object.Introspect(self, object_path,
1245
connection)
1246
try:
1247
document = xml.dom.minidom.parseString(xmlstring)
1248
1249
for if_tag in document.getElementsByTagName("interface"):
1250
# Add annotation tags
1251
for typ in ("method", "signal"):
1252
for tag in if_tag.getElementsByTagName(typ):
1253
annots = dict()
1254
for name, prop in (self.
1255
_get_all_dbus_things(typ)):
1256
if (name == tag.getAttribute("name")
1257
and prop._dbus_interface
1258
== if_tag.getAttribute("name")):
1259
annots.update(getattr(
1260
prop, "_dbus_annotations", {}))
1261
for name, value in annots.items():
1262
ann_tag = document.createElement(
1263
"annotation")
1264
ann_tag.setAttribute("name", name)
1265
ann_tag.setAttribute("value", value)
1266
tag.appendChild(ann_tag)
1267
# Add interface annotation tags
1268
for annotation, value in dict(
1269
itertools.chain.from_iterable(
1270
annotations().items()
1271
for name, annotations
1272
in self._get_all_dbus_things("interface")
1273
if name == if_tag.getAttribute("name")
1274
)).items():
1275
ann_tag = document.createElement("annotation")
1276
ann_tag.setAttribute("name", annotation)
1277
ann_tag.setAttribute("value", value)
1278
if_tag.appendChild(ann_tag)
1279
# Fix argument name for the Introspect method itself
1280
if (if_tag.getAttribute("name")
1281
== dbus.INTROSPECTABLE_IFACE):
1282
for cn in if_tag.getElementsByTagName("method"):
1283
if cn.getAttribute("name") == "Introspect":
1284
for arg in cn.getElementsByTagName("arg"):
1285
if (arg.getAttribute("direction")
1286
== "out"):
1287
arg.setAttribute("name",
1288
"xml_data")
1289
xmlstring = document.toxml("utf-8")
1290
document.unlink()
1291
except (AttributeError, xml.dom.DOMException,
1292
xml.parsers.expat.ExpatError) as error:
1293
logger.error("Failed to override Introspection method",
1294
exc_info=error)
1295
return xmlstring
1296
1297
1298
class DBusObjectWithProperties(DBusObjectWithAnnotations):
574
1299
"""A D-Bus object with properties.
575
1300
576
1301
Classes inheriting from this can use the dbus_service_property
577
1302
decorator to expose methods as D-Bus properties. It exposes the
578
1303
standard Get(), Set(), and GetAll() methods on the D-Bus.
579
1304
"""
580
581
@staticmethod
582
def _is_dbus_property(obj):
583
return getattr(obj, "_dbus_is_property", False)
584
585
def _get_all_dbus_properties(self):
586
"""Returns a generator of (name, attribute) pairs
587
"""
588
return ((prop._dbus_name, prop)
589
for name, prop in
590
inspect.getmembers(self, self._is_dbus_property))
591
1305
592
1306
def _get_dbus_property(self, interface_name, property_name):
593
1307
"""Returns a bound method if one exists which is a D-Bus
594
1308
property with the specified name and interface.
595
1309
"""
596
for name in (property_name,
597
property_name + "_dbus_property"):
598
prop = getattr(self, name, None)
599
if (prop is None
600
or not self._is_dbus_property(prop)
601
or prop._dbus_name != property_name
602
or (interface_name and prop._dbus_interface
603
and interface_name != prop._dbus_interface)):
604
continue
605
return prop
1310
for cls in self.__class__.__mro__:
1311
for name, value in inspect.getmembers(
1312
cls, self._is_dbus_thing("property")):
1313
if (value._dbus_name == property_name
1314
and value._dbus_interface == interface_name):
1315
return value.__get__(self)
1316
606
1317
# No such property
607
raise DBusPropertyNotFound(self.dbus_object_path + ":"
608
+ interface_name + "."
609
+ property_name)
610
611
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
1318
raise DBusPropertyNotFound("{}:{}.{}".format(
1319
self.dbus_object_path, interface_name, property_name))
1320
1321
@classmethod
1322
def _get_all_interface_names(cls):
1323
"""Get a sequence of all interfaces supported by an object"""
1324
return (name for name in set(getattr(getattr(x, attr),
1325
"_dbus_interface", None)
1326
for x in (inspect.getmro(cls))
1327
for attr in dir(x))
1328
if name is not None)
1329
1330
@dbus.service.method(dbus.PROPERTIES_IFACE,
1331
in_signature="ss",
612
1332
out_signature="v")
613
1333
def Get(self, interface_name, property_name):
614
1334
"""Standard D-Bus property Get() method, see D-Bus standard.
620
1340
if not hasattr(value, "variant_level"):
621
1341
return value
622
1342
return type(value)(value, variant_level=value.variant_level+1)
623
1343
624
1344
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
625
1345
def Set(self, interface_name, property_name, value):
626
1346
"""Standard D-Bus property Set() method, see D-Bus standard.
632
1352
# The byte_arrays option is not supported yet on
633
1353
# signatures other than "ay".
634
1354
if prop._dbus_signature != "ay":
635
raise ValueError
636
value = dbus.ByteArray(''.join(unichr(byte)
637
for byte in value))
1355
raise ValueError("Byte arrays not supported for non-"
1356
"'ay' signature {!r}"
1357
.format(prop._dbus_signature))
1358
value = dbus.ByteArray(b''.join(chr(byte)
1359
for byte in value))
638
1360
prop(value)
639
640
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
1361
1362
@dbus.service.method(dbus.PROPERTIES_IFACE,
1363
in_signature="s",
641
1364
out_signature="a{sv}")
642
1365
def GetAll(self, interface_name):
643
1366
"""Standard D-Bus property GetAll() method, see D-Bus
645
1368
646
1369
Note: Will not include properties with access="write".
647
1370
"""
648
all = {}
649
for name, prop in self._get_all_dbus_properties():
1371
properties = {}
1372
for name, prop in self._get_all_dbus_things("property"):
650
1373
if (interface_name
651
1374
and interface_name != prop._dbus_interface):
652
1375
# Interface non-empty but did not match
656
1379
continue
657
1380
value = prop()
658
1381
if not hasattr(value, "variant_level"):
659
all[name] = value
1382
properties[name] = value
660
1383
continue
661
all[name] = type(value)(value, variant_level=
662
value.variant_level+1)
663
return dbus.Dictionary(all, signature="sv")
664
1384
properties[name] = type(value)(
1385
value, variant_level=value.variant_level + 1)
1386
return dbus.Dictionary(properties, signature="sv")
1387
1388
@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
1389
def PropertiesChanged(self, interface_name, changed_properties,
1390
invalidated_properties):
1391
"""Standard D-Bus PropertiesChanged() signal, see D-Bus
1392
standard.
1393
"""
1394
pass
1395
665
1396
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
666
1397
out_signature="s",
667
1398
path_keyword='object_path',
668
1399
connection_keyword='connection')
669
1400
def Introspect(self, object_path, connection):
670
"""Standard D-Bus method, overloaded to insert property tags.
1401
"""Overloading of standard D-Bus method.
1402
1403
Inserts property tags and interface annotation tags.
671
1404
"""
672
xmlstring = dbus.service.Object.Introspect(self, object_path,
673
connection)
1405
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1406
object_path,
1407
connection)
674
1408
try:
675
1409
document = xml.dom.minidom.parseString(xmlstring)
1410
676
1411
def make_tag(document, name, prop):
677
1412
e = document.createElement("property")
678
1413
e.setAttribute("name", name)
679
1414
e.setAttribute("type", prop._dbus_signature)
680
1415
e.setAttribute("access", prop._dbus_access)
681
1416
return e
1417
682
1418
for if_tag in document.getElementsByTagName("interface"):
1419
# Add property tags
683
1420
for tag in (make_tag(document, name, prop)
684
1421
for name, prop
685
in self._get_all_dbus_properties()
1422
in self._get_all_dbus_things("property")
686
1423
if prop._dbus_interface
687
1424
== if_tag.getAttribute("name")):
688
1425
if_tag.appendChild(tag)
1426
# Add annotation tags for properties
1427
for tag in if_tag.getElementsByTagName("property"):
1428
annots = dict()
1429
for name, prop in self._get_all_dbus_things(
1430
"property"):
1431
if (name == tag.getAttribute("name")
1432
and prop._dbus_interface
1433
== if_tag.getAttribute("name")):
1434
annots.update(getattr(
1435
prop, "_dbus_annotations", {}))
1436
for name, value in annots.items():
1437
ann_tag = document.createElement(
1438
"annotation")
1439
ann_tag.setAttribute("name", name)
1440
ann_tag.setAttribute("value", value)
1441
tag.appendChild(ann_tag)
689
1442
# Add the names to the return values for the
690
1443
# "org.freedesktop.DBus.Properties" methods
691
1444
if (if_tag.getAttribute("name")
704
1457
xmlstring = document.toxml("utf-8")
705
1458
document.unlink()
706
1459
except (AttributeError, xml.dom.DOMException,
707
xml.parsers.expat.ExpatError), error:
708
logger.error("Failed to override Introspection method",
709
error)
710
return xmlstring
711
712
1460
xml.parsers.expat.ExpatError) as error:
1461
logger.error("Failed to override Introspection method",
1462
exc_info=error)
1463
return xmlstring
1464
1465
1466
try:
1467
dbus.OBJECT_MANAGER_IFACE
1468
except AttributeError:
1469
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1470
1471
1472
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1473
"""A D-Bus object with an ObjectManager.
1474
1475
Classes inheriting from this exposes the standard
1476
GetManagedObjects call and the InterfacesAdded and
1477
InterfacesRemoved signals on the standard
1478
"org.freedesktop.DBus.ObjectManager" interface.
1479
1480
Note: No signals are sent automatically; they must be sent
1481
manually.
1482
"""
1483
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1484
out_signature="a{oa{sa{sv}}}")
1485
def GetManagedObjects(self):
1486
"""This function must be overridden"""
1487
raise NotImplementedError()
1488
1489
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1490
signature="oa{sa{sv}}")
1491
def InterfacesAdded(self, object_path, interfaces_and_properties):
1492
pass
1493
1494
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1495
def InterfacesRemoved(self, object_path, interfaces):
1496
pass
1497
1498
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1499
out_signature="s",
1500
path_keyword='object_path',
1501
connection_keyword='connection')
1502
def Introspect(self, object_path, connection):
1503
"""Overloading of standard D-Bus method.
1504
1505
Override return argument name of GetManagedObjects to be
1506
"objpath_interfaces_and_properties"
1507
"""
1508
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1509
object_path,
1510
connection)
1511
try:
1512
document = xml.dom.minidom.parseString(xmlstring)
1513
1514
for if_tag in document.getElementsByTagName("interface"):
1515
# Fix argument name for the GetManagedObjects method
1516
if (if_tag.getAttribute("name")
1517
== dbus.OBJECT_MANAGER_IFACE):
1518
for cn in if_tag.getElementsByTagName("method"):
1519
if (cn.getAttribute("name")
1520
== "GetManagedObjects"):
1521
for arg in cn.getElementsByTagName("arg"):
1522
if (arg.getAttribute("direction")
1523
== "out"):
1524
arg.setAttribute(
1525
"name",
1526
"objpath_interfaces"
1527
"_and_properties")
1528
xmlstring = document.toxml("utf-8")
1529
document.unlink()
1530
except (AttributeError, xml.dom.DOMException,
1531
xml.parsers.expat.ExpatError) as error:
1532
logger.error("Failed to override Introspection method",
1533
exc_info=error)
1534
return xmlstring
1535
1536
1537
def datetime_to_dbus(dt, variant_level=0):
1538
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1539
if dt is None:
1540
return dbus.String("", variant_level=variant_level)
1541
return dbus.String(dt.isoformat(), variant_level=variant_level)
1542
1543
1544
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1545
"""A class decorator; applied to a subclass of
1546
dbus.service.Object, it will add alternate D-Bus attributes with
1547
interface names according to the "alt_interface_names" mapping.
1548
Usage:
1549
1550
@alternate_dbus_interfaces({"org.example.Interface":
1551
"net.example.AlternateInterface"})
1552
class SampleDBusObject(dbus.service.Object):
1553
@dbus.service.method("org.example.Interface")
1554
def SampleDBusMethod():
1555
pass
1556
1557
The above "SampleDBusMethod" on "SampleDBusObject" will be
1558
reachable via two interfaces: "org.example.Interface" and
1559
"net.example.AlternateInterface", the latter of which will have
1560
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1561
"true", unless "deprecate" is passed with a False value.
1562
1563
This works for methods and signals, and also for D-Bus properties
1564
(from DBusObjectWithProperties) and interfaces (from the
1565
dbus_interface_annotations decorator).
1566
"""
1567
1568
def wrapper(cls):
1569
for orig_interface_name, alt_interface_name in (
1570
alt_interface_names.items()):
1571
attr = {}
1572
interface_names = set()
1573
# Go though all attributes of the class
1574
for attrname, attribute in inspect.getmembers(cls):
1575
# Ignore non-D-Bus attributes, and D-Bus attributes
1576
# with the wrong interface name
1577
if (not hasattr(attribute, "_dbus_interface")
1578
or not attribute._dbus_interface.startswith(
1579
orig_interface_name)):
1580
continue
1581
# Create an alternate D-Bus interface name based on
1582
# the current name
1583
alt_interface = attribute._dbus_interface.replace(
1584
orig_interface_name, alt_interface_name)
1585
interface_names.add(alt_interface)
1586
# Is this a D-Bus signal?
1587
if getattr(attribute, "_dbus_is_signal", False):
1588
# Extract the original non-method undecorated
1589
# function by black magic
1590
if sys.version_info.major == 2:
1591
nonmethod_func = (dict(
1592
zip(attribute.func_code.co_freevars,
1593
attribute.__closure__))
1594
["func"].cell_contents)
1595
else:
1596
nonmethod_func = (dict(
1597
zip(attribute.__code__.co_freevars,
1598
attribute.__closure__))
1599
["func"].cell_contents)
1600
# Create a new, but exactly alike, function
1601
# object, and decorate it to be a new D-Bus signal
1602
# with the alternate D-Bus interface name
1603
new_function = copy_function(nonmethod_func)
1604
new_function = (dbus.service.signal(
1605
alt_interface,
1606
attribute._dbus_signature)(new_function))
1607
# Copy annotations, if any
1608
try:
1609
new_function._dbus_annotations = dict(
1610
attribute._dbus_annotations)
1611
except AttributeError:
1612
pass
1613
1614
# Define a creator of a function to call both the
1615
# original and alternate functions, so both the
1616
# original and alternate signals gets sent when
1617
# the function is called
1618
def fixscope(func1, func2):
1619
"""This function is a scope container to pass
1620
func1 and func2 to the "call_both" function
1621
outside of its arguments"""
1622
1623
@functools.wraps(func2)
1624
def call_both(*args, **kwargs):
1625
"""This function will emit two D-Bus
1626
signals by calling func1 and func2"""
1627
func1(*args, **kwargs)
1628
func2(*args, **kwargs)
1629
# Make wrapper function look like a D-Bus
1630
# signal
1631
for name, attr in inspect.getmembers(func2):
1632
if name.startswith("_dbus_"):
1633
setattr(call_both, name, attr)
1634
1635
return call_both
1636
# Create the "call_both" function and add it to
1637
# the class
1638
attr[attrname] = fixscope(attribute, new_function)
1639
# Is this a D-Bus method?
1640
elif getattr(attribute, "_dbus_is_method", False):
1641
# Create a new, but exactly alike, function
1642
# object. Decorate it to be a new D-Bus method
1643
# with the alternate D-Bus interface name. Add it
1644
# to the class.
1645
attr[attrname] = (
1646
dbus.service.method(
1647
alt_interface,
1648
attribute._dbus_in_signature,
1649
attribute._dbus_out_signature)
1650
(copy_function(attribute)))
1651
# Copy annotations, if any
1652
try:
1653
attr[attrname]._dbus_annotations = dict(
1654
attribute._dbus_annotations)
1655
except AttributeError:
1656
pass
1657
# Is this a D-Bus property?
1658
elif getattr(attribute, "_dbus_is_property", False):
1659
# Create a new, but exactly alike, function
1660
# object, and decorate it to be a new D-Bus
1661
# property with the alternate D-Bus interface
1662
# name. Add it to the class.
1663
attr[attrname] = (dbus_service_property(
1664
alt_interface, attribute._dbus_signature,
1665
attribute._dbus_access,
1666
attribute._dbus_get_args_options
1667
["byte_arrays"])
1668
(copy_function(attribute)))
1669
# Copy annotations, if any
1670
try:
1671
attr[attrname]._dbus_annotations = dict(
1672
attribute._dbus_annotations)
1673
except AttributeError:
1674
pass
1675
# Is this a D-Bus interface?
1676
elif getattr(attribute, "_dbus_is_interface", False):
1677
# Create a new, but exactly alike, function
1678
# object. Decorate it to be a new D-Bus interface
1679
# with the alternate D-Bus interface name. Add it
1680
# to the class.
1681
attr[attrname] = (
1682
dbus_interface_annotations(alt_interface)
1683
(copy_function(attribute)))
1684
if deprecate:
1685
# Deprecate all alternate interfaces
1686
iname = "_AlternateDBusNames_interface_annotation{}"
1687
for interface_name in interface_names:
1688
1689
@dbus_interface_annotations(interface_name)
1690
def func(self):
1691
return {"org.freedesktop.DBus.Deprecated":
1692
"true"}
1693
# Find an unused name
1694
for aname in (iname.format(i)
1695
for i in itertools.count()):
1696
if aname not in attr:
1697
attr[aname] = func
1698
break
1699
if interface_names:
1700
# Replace the class with a new subclass of it with
1701
# methods, signals, etc. as created above.
1702
if sys.version_info.major == 2:
1703
cls = type(b"{}Alternate".format(cls.__name__),
1704
(cls, ), attr)
1705
else:
1706
cls = type("{}Alternate".format(cls.__name__),
1707
(cls, ), attr)
1708
return cls
1709
1710
return wrapper
1711
1712
1713
@alternate_dbus_interfaces({"se.recompile.Mandos":
1714
"se.bsnet.fukt.Mandos"})
713
1715
class ClientDBus(Client, DBusObjectWithProperties):
714
1716
"""A Client class using D-Bus
715
1717
716
1718
Attributes:
717
1719
dbus_object_path: dbus.ObjectPath
718
1720
bus: dbus.SystemBus()
719
1721
"""
720
1722
721
1723
runtime_expansions = (Client.runtime_expansions
722
+ ("dbus_object_path",))
723
1724
+ ("dbus_object_path", ))
1725
1726
_interface = "se.recompile.Mandos.Client"
1727
724
1728
# dbus.service.Object doesn't use super(), so we can't either.
725
726
def __init__(self, bus = None, *args, **kwargs):
727
self._approvals_pending = 0
1729
1730
def __init__(self, bus=None, *args, **kwargs):
728
1731
self.bus = bus
729
1732
Client.__init__(self, *args, **kwargs)
730
1733
# Only now, when this client is initialized, can it show up on
731
1734
# the D-Bus
732
client_object_name = unicode(self.name).translate(
1735
client_object_name = str(self.name).translate(
733
1736
{ord("."): ord("_"),
734
1737
ord("-"): ord("_")})
735
self.dbus_object_path = (dbus.ObjectPath
736
("/clients/" + client_object_name))
1738
self.dbus_object_path = dbus.ObjectPath(
1739
"/clients/" + client_object_name)
737
1740
DBusObjectWithProperties.__init__(self, self.bus,
738
1741
self.dbus_object_path)
739
740
def _get_approvals_pending(self):
741
return self._approvals_pending
742
def _set_approvals_pending(self, value):
743
old_value = self._approvals_pending
744
self._approvals_pending = value
745
bval = bool(value)
746
if (hasattr(self, "dbus_object_path")
747
and bval is not bool(old_value)):
748
dbus_bool = dbus.Boolean(bval, variant_level=1)
749
self.PropertyChanged(dbus.String("ApprovalPending"),
750
dbus_bool)
751
752
approvals_pending = property(_get_approvals_pending,
753
_set_approvals_pending)
754
del _get_approvals_pending, _set_approvals_pending
755
756
@staticmethod
757
def _datetime_to_dbus(dt, variant_level=0):
758
"""Convert a UTC datetime.datetime() to a D-Bus type."""
759
return dbus.String(dt.isoformat(),
760
variant_level=variant_level)
761
762
def enable(self):
763
oldstate = getattr(self, "enabled", False)
764
r = Client.enable(self)
765
if oldstate != self.enabled:
766
# Emit D-Bus signals
767
self.PropertyChanged(dbus.String("Enabled"),
768
dbus.Boolean(True, variant_level=1))
769
self.PropertyChanged(
770
dbus.String("LastEnabled"),
771
self._datetime_to_dbus(self.last_enabled,
772
variant_level=1))
773
return r
774
775
def disable(self, quiet = False):
776
oldstate = getattr(self, "enabled", False)
777
r = Client.disable(self, quiet=quiet)
778
if not quiet and oldstate != self.enabled:
779
# Emit D-Bus signal
780
self.PropertyChanged(dbus.String("Enabled"),
781
dbus.Boolean(False, variant_level=1))
782
return r
783
1742
1743
def notifychangeproperty(transform_func, dbus_name,
1744
type_func=lambda x: x,
1745
variant_level=1,
1746
invalidate_only=False,
1747
_interface=_interface):
1748
""" Modify a variable so that it's a property which announces
1749
its changes to DBus.
1750
1751
transform_fun: Function that takes a value and a variant_level
1752
and transforms it to a D-Bus type.
1753
dbus_name: D-Bus name of the variable
1754
type_func: Function that transform the value before sending it
1755
to the D-Bus. Default: no transform
1756
variant_level: D-Bus variant level. Default: 1
1757
"""
1758
attrname = "_{}".format(dbus_name)
1759
1760
def setter(self, value):
1761
if hasattr(self, "dbus_object_path"):
1762
if (not hasattr(self, attrname) or
1763
type_func(getattr(self, attrname, None))
1764
!= type_func(value)):
1765
if invalidate_only:
1766
self.PropertiesChanged(
1767
_interface, dbus.Dictionary(),
1768
dbus.Array((dbus_name, )))
1769
else:
1770
dbus_value = transform_func(
1771
type_func(value),
1772
variant_level=variant_level)
1773
self.PropertyChanged(dbus.String(dbus_name),
1774
dbus_value)
1775
self.PropertiesChanged(
1776
_interface,
1777
dbus.Dictionary({dbus.String(dbus_name):
1778
dbus_value}),
1779
dbus.Array())
1780
setattr(self, attrname, value)
1781
1782
return property(lambda self: getattr(self, attrname), setter)
1783
1784
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1785
approvals_pending = notifychangeproperty(dbus.Boolean,
1786
"ApprovalPending",
1787
type_func=bool)
1788
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1789
last_enabled = notifychangeproperty(datetime_to_dbus,
1790
"LastEnabled")
1791
checker = notifychangeproperty(
1792
dbus.Boolean, "CheckerRunning",
1793
type_func=lambda checker: checker is not None)
1794
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1795
"LastCheckedOK")
1796
last_checker_status = notifychangeproperty(dbus.Int16,
1797
"LastCheckerStatus")
1798
last_approval_request = notifychangeproperty(
1799
datetime_to_dbus, "LastApprovalRequest")
1800
approved_by_default = notifychangeproperty(dbus.Boolean,
1801
"ApprovedByDefault")
1802
approval_delay = notifychangeproperty(
1803
dbus.UInt64, "ApprovalDelay",
1804
type_func=lambda td: td.total_seconds() * 1000)
1805
approval_duration = notifychangeproperty(
1806
dbus.UInt64, "ApprovalDuration",
1807
type_func=lambda td: td.total_seconds() * 1000)
1808
host = notifychangeproperty(dbus.String, "Host")
1809
timeout = notifychangeproperty(
1810
dbus.UInt64, "Timeout",
1811
type_func=lambda td: td.total_seconds() * 1000)
1812
extended_timeout = notifychangeproperty(
1813
dbus.UInt64, "ExtendedTimeout",
1814
type_func=lambda td: td.total_seconds() * 1000)
1815
interval = notifychangeproperty(
1816
dbus.UInt64, "Interval",
1817
type_func=lambda td: td.total_seconds() * 1000)
1818
checker_command = notifychangeproperty(dbus.String, "Checker")
1819
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1820
invalidate_only=True)
1821
1822
del notifychangeproperty
1823
784
1824
def __del__(self, *args, **kwargs):
785
1825
try:
786
1826
self.remove_from_connection()
789
1829
if hasattr(DBusObjectWithProperties, "__del__"):
790
1830
DBusObjectWithProperties.__del__(self, *args, **kwargs)
791
1831
Client.__del__(self, *args, **kwargs)
792
793
def checker_callback(self, pid, condition, command,
794
*args, **kwargs):
795
self.checker_callback_tag = None
796
self.checker = None
797
# Emit D-Bus signal
798
self.PropertyChanged(dbus.String("CheckerRunning"),
799
dbus.Boolean(False, variant_level=1))
800
if os.WIFEXITED(condition):
801
exitstatus = os.WEXITSTATUS(condition)
1832
1833
def checker_callback(self, source, condition,
1834
connection, command, *args, **kwargs):
1835
ret = Client.checker_callback(self, source, condition,
1836
connection, command, *args,
1837
**kwargs)
1838
exitstatus = self.last_checker_status
1839
if exitstatus >= 0:
802
1840
# Emit D-Bus signal
803
1841
self.CheckerCompleted(dbus.Int16(exitstatus),
804
dbus.Int64(condition),
1842
# This is specific to GNU libC
1843
dbus.Int64(exitstatus << 8),
805
1844
dbus.String(command))
806
1845
else:
807
1846
# Emit D-Bus signal
808
1847
self.CheckerCompleted(dbus.Int16(-1),
809
dbus.Int64(condition),
1848
dbus.Int64(
1849
# This is specific to GNU libC
1850
(exitstatus << 8)
1851
| self.last_checker_signal),
810
1852
dbus.String(command))
811
812
return Client.checker_callback(self, pid, condition, command,
813
*args, **kwargs)
814
815
def checked_ok(self, *args, **kwargs):
816
r = Client.checked_ok(self, *args, **kwargs)
817
# Emit D-Bus signal
818
self.PropertyChanged(
819
dbus.String("LastCheckedOK"),
820
(self._datetime_to_dbus(self.last_checked_ok,
821
variant_level=1)))
822
return r
823
824
def need_approval(self, *args, **kwargs):
825
r = Client.need_approval(self, *args, **kwargs)
826
# Emit D-Bus signal
827
self.PropertyChanged(
828
dbus.String("LastApprovalRequest"),
829
(self._datetime_to_dbus(self.last_approval_request,
830
variant_level=1)))
831
return r
832
1853
return ret
1854
833
1855
def start_checker(self, *args, **kwargs):
834
old_checker = self.checker
835
if self.checker is not None:
836
old_checker_pid = self.checker.pid
837
else:
838
old_checker_pid = None
1856
old_checker_pid = getattr(self.checker, "pid", None)
839
1857
r = Client.start_checker(self, *args, **kwargs)
840
1858
# Only if new checker process was started
841
1859
if (self.checker is not None
842
1860
and old_checker_pid != self.checker.pid):
843
1861
# Emit D-Bus signal
844
1862
self.CheckerStarted(self.current_checker_command)
845
self.PropertyChanged(
846
dbus.String("CheckerRunning"),
847
dbus.Boolean(True, variant_level=1))
848
return r
849
850
def stop_checker(self, *args, **kwargs):
851
old_checker = getattr(self, "checker", None)
852
r = Client.stop_checker(self, *args, **kwargs)
853
if (old_checker is not None
854
and getattr(self, "checker", None) is None):
855
self.PropertyChanged(dbus.String("CheckerRunning"),
856
dbus.Boolean(False, variant_level=1))
857
1863
return r
858
1864
859
1865
def _reset_approved(self):
860
self._approved = None
1866
self.approved = None
861
1867
return False
862
1868
863
1869
def approve(self, value=True):
1870
self.approved = value
1871
GLib.timeout_add(int(self.approval_duration.total_seconds()
1872
* 1000), self._reset_approved)
864
1873
self.send_changedstate()
865
self._approved = value
866
gobject.timeout_add(self._timedelta_to_milliseconds
867
(self.approval_duration),
868
self._reset_approved)
869
870
871
## D-Bus methods, signals & properties
872
_interface = "se.bsnet.fukt.Mandos.Client"
873
874
## Signals
875
1874
1875
# D-Bus methods, signals & properties
1876
1877
# Interfaces
1878
1879
# Signals
1880
876
1881
# CheckerCompleted - signal
877
1882
@dbus.service.signal(_interface, signature="nxs")
878
1883
def CheckerCompleted(self, exitcode, waitstatus, command):
879
1884
"D-Bus signal"
880
1885
pass
881
1886
882
1887
# CheckerStarted - signal
883
1888
@dbus.service.signal(_interface, signature="s")
884
1889
def CheckerStarted(self, command):
885
1890
"D-Bus signal"
886
1891
pass
887
1892
888
1893
# PropertyChanged - signal
1894
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
889
1895
@dbus.service.signal(_interface, signature="sv")
890
1896
def PropertyChanged(self, property, value):
891
1897
"D-Bus signal"
892
1898
pass
893
1899
894
1900
# GotSecret - signal
895
1901
@dbus.service.signal(_interface)
896
1902
def GotSecret(self):
899
1905
server to mandos-client
900
1906
"""
901
1907
pass
902
1908
903
1909
# Rejected - signal
904
1910
@dbus.service.signal(_interface, signature="s")
905
1911
def Rejected(self, reason):
906
1912
"D-Bus signal"
907
1913
pass
908
1914
909
1915
# NeedApproval - signal
910
1916
@dbus.service.signal(_interface, signature="tb")
911
1917
def NeedApproval(self, timeout, default):
912
1918
"D-Bus signal"
913
1919
return self.need_approval()
914
915
## Methods
916
1920
1921
# Methods
1922
917
1923
# Approve - method
918
1924
@dbus.service.method(_interface, in_signature="b")
919
1925
def Approve(self, value):
920
1926
self.approve(value)
921
1927
922
1928
# CheckedOK - method
923
1929
@dbus.service.method(_interface)
924
1930
def CheckedOK(self):
925
return self.checked_ok()
926
1931
self.checked_ok()
1932
927
1933
# Enable - method
1934
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
928
1935
@dbus.service.method(_interface)
929
1936
def Enable(self):
930
1937
"D-Bus method"
931
1938
self.enable()
932
1939
933
1940
# StartChecker - method
1941
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
934
1942
@dbus.service.method(_interface)
935
1943
def StartChecker(self):
936
1944
"D-Bus method"
937
1945
self.start_checker()
938
1946
939
1947
# Disable - method
1948
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
940
1949
@dbus.service.method(_interface)
941
1950
def Disable(self):
942
1951
"D-Bus method"
943
1952
self.disable()
944
1953
945
1954
# StopChecker - method
1955
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
946
1956
@dbus.service.method(_interface)
947
1957
def StopChecker(self):
948
1958
self.stop_checker()
949
950
## Properties
951
1959
1960
# Properties
1961
952
1962
# ApprovalPending - property
953
1963
@dbus_service_property(_interface, signature="b", access="read")
954
1964
def ApprovalPending_dbus_property(self):
955
1965
return dbus.Boolean(bool(self.approvals_pending))
956
1966
957
1967
# ApprovedByDefault - property
958
@dbus_service_property(_interface, signature="b",
1968
@dbus_service_property(_interface,
1969
signature="b",
959
1970
access="readwrite")
960
1971
def ApprovedByDefault_dbus_property(self, value=None):
961
1972
if value is None: # get
962
1973
return dbus.Boolean(self.approved_by_default)
963
1974
self.approved_by_default = bool(value)
964
# Emit D-Bus signal
965
self.PropertyChanged(dbus.String("ApprovedByDefault"),
966
dbus.Boolean(value, variant_level=1))
967
1975
968
1976
# ApprovalDelay - property
969
@dbus_service_property(_interface, signature="t",
1977
@dbus_service_property(_interface,
1978
signature="t",
970
1979
access="readwrite")
971
1980
def ApprovalDelay_dbus_property(self, value=None):
972
1981
if value is None: # get
973
return dbus.UInt64(self.approval_delay_milliseconds())
1982
return dbus.UInt64(self.approval_delay.total_seconds()
1983
* 1000)
974
1984
self.approval_delay = datetime.timedelta(0, 0, 0, value)
975
# Emit D-Bus signal
976
self.PropertyChanged(dbus.String("ApprovalDelay"),
977
dbus.UInt64(value, variant_level=1))
978
1985
979
1986
# ApprovalDuration - property
980
@dbus_service_property(_interface, signature="t",
1987
@dbus_service_property(_interface,
1988
signature="t",
981
1989
access="readwrite")
982
1990
def ApprovalDuration_dbus_property(self, value=None):
983
1991
if value is None: # get
984
return dbus.UInt64(self._timedelta_to_milliseconds(
985
self.approval_duration))
1992
return dbus.UInt64(self.approval_duration.total_seconds()
1993
* 1000)
986
1994
self.approval_duration = datetime.timedelta(0, 0, 0, value)
987
# Emit D-Bus signal
988
self.PropertyChanged(dbus.String("ApprovalDuration"),
989
dbus.UInt64(value, variant_level=1))
990
1995
991
1996
# Name - property
1997
@dbus_annotations(
1998
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
992
1999
@dbus_service_property(_interface, signature="s", access="read")
993
2000
def Name_dbus_property(self):
994
2001
return dbus.String(self.name)
995
2002
996
2003
# Fingerprint - property
2004
@dbus_annotations(
2005
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
997
2006
@dbus_service_property(_interface, signature="s", access="read")
998
2007
def Fingerprint_dbus_property(self):
999
2008
return dbus.String(self.fingerprint)
1000
2009
1001
2010
# Host - property
1002
@dbus_service_property(_interface, signature="s",
2011
@dbus_service_property(_interface,
2012
signature="s",
1003
2013
access="readwrite")
1004
2014
def Host_dbus_property(self, value=None):
1005
2015
if value is None: # get
1006
2016
return dbus.String(self.host)
1007
self.host = value
1008
# Emit D-Bus signal
1009
self.PropertyChanged(dbus.String("Host"),
1010
dbus.String(value, variant_level=1))
1011
2017
self.host = str(value)
2018
1012
2019
# Created - property
2020
@dbus_annotations(
2021
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1013
2022
@dbus_service_property(_interface, signature="s", access="read")
1014
2023
def Created_dbus_property(self):
1015
return dbus.String(self._datetime_to_dbus(self.created))
1016
2024
return datetime_to_dbus(self.created)
2025
1017
2026
# LastEnabled - property
1018
2027
@dbus_service_property(_interface, signature="s", access="read")
1019
2028
def LastEnabled_dbus_property(self):
1020
if self.last_enabled is None:
1021
return dbus.String("")
1022
return dbus.String(self._datetime_to_dbus(self.last_enabled))
1023
2029
return datetime_to_dbus(self.last_enabled)
2030
1024
2031
# Enabled - property
1025
@dbus_service_property(_interface, signature="b",
2032
@dbus_service_property(_interface,
2033
signature="b",
1026
2034
access="readwrite")
1027
2035
def Enabled_dbus_property(self, value=None):
1028
2036
if value is None: # get
1031
2039
self.enable()
1032
2040
else:
1033
2041
self.disable()
1034
2042
1035
2043
# LastCheckedOK - property
1036
@dbus_service_property(_interface, signature="s",
2044
@dbus_service_property(_interface,
2045
signature="s",
1037
2046
access="readwrite")
1038
2047
def LastCheckedOK_dbus_property(self, value=None):
1039
2048
if value is not None:
1040
2049
self.checked_ok()
1041
2050
return
1042
if self.last_checked_ok is None:
1043
return dbus.String("")
1044
return dbus.String(self._datetime_to_dbus(self
1045
.last_checked_ok))
1046
2051
return datetime_to_dbus(self.last_checked_ok)
2052
2053
# LastCheckerStatus - property
2054
@dbus_service_property(_interface, signature="n", access="read")
2055
def LastCheckerStatus_dbus_property(self):
2056
return dbus.Int16(self.last_checker_status)
2057
2058
# Expires - property
2059
@dbus_service_property(_interface, signature="s", access="read")
2060
def Expires_dbus_property(self):
2061
return datetime_to_dbus(self.expires)
2062
1047
2063
# LastApprovalRequest - property
1048
2064
@dbus_service_property(_interface, signature="s", access="read")
1049
2065
def LastApprovalRequest_dbus_property(self):
1050
if self.last_approval_request is None:
1051
return dbus.String("")
1052
return dbus.String(self.
1053
_datetime_to_dbus(self
1054
.last_approval_request))
1055
2066
return datetime_to_dbus(self.last_approval_request)
2067
1056
2068
# Timeout - property
1057
@dbus_service_property(_interface, signature="t",
2069
@dbus_service_property(_interface,
2070
signature="t",
1058
2071
access="readwrite")
1059
2072
def Timeout_dbus_property(self, value=None):
1060
2073
if value is None: # get
1061
return dbus.UInt64(self.timeout_milliseconds())
2074
return dbus.UInt64(self.timeout.total_seconds() * 1000)
2075
old_timeout = self.timeout
1062
2076
self.timeout = datetime.timedelta(0, 0, 0, value)
1063
# Emit D-Bus signal
1064
self.PropertyChanged(dbus.String("Timeout"),
1065
dbus.UInt64(value, variant_level=1))
1066
if getattr(self, "disable_initiator_tag", None) is None:
1067
return
1068
# Reschedule timeout
1069
gobject.source_remove(self.disable_initiator_tag)
1070
self.disable_initiator_tag = None
1071
time_to_die = (self.
1072
_timedelta_to_milliseconds((self
1073
.last_checked_ok
1074
+ self.timeout)
1075
- datetime.datetime
1076
.utcnow()))
1077
if time_to_die <= 0:
1078
# The timeout has passed
1079
self.disable()
1080
else:
1081
self.disable_initiator_tag = (gobject.timeout_add
1082
(time_to_die, self.disable))
1083
2077
# Reschedule disabling
2078
if self.enabled:
2079
now = datetime.datetime.utcnow()
2080
self.expires += self.timeout - old_timeout
2081
if self.expires <= now:
2082
# The timeout has passed
2083
self.disable()
2084
else:
2085
if (getattr(self, "disable_initiator_tag", None)
2086
is None):
2087
return
2088
GLib.source_remove(self.disable_initiator_tag)
2089
self.disable_initiator_tag = GLib.timeout_add(
2090
int((self.expires - now).total_seconds() * 1000),
2091
self.disable)
2092
2093
# ExtendedTimeout - property
2094
@dbus_service_property(_interface,
2095
signature="t",
2096
access="readwrite")
2097
def ExtendedTimeout_dbus_property(self, value=None):
2098
if value is None: # get
2099
return dbus.UInt64(self.extended_timeout.total_seconds()
2100
* 1000)
2101
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
2102
1084
2103
# Interval - property
1085
@dbus_service_property(_interface, signature="t",
2104
@dbus_service_property(_interface,
2105
signature="t",
1086
2106
access="readwrite")
1087
2107
def Interval_dbus_property(self, value=None):
1088
2108
if value is None: # get
1089
return dbus.UInt64(self.interval_milliseconds())
2109
return dbus.UInt64(self.interval.total_seconds() * 1000)
1090
2110
self.interval = datetime.timedelta(0, 0, 0, value)
1091
# Emit D-Bus signal
1092
self.PropertyChanged(dbus.String("Interval"),
1093
dbus.UInt64(value, variant_level=1))
1094
2111
if getattr(self, "checker_initiator_tag", None) is None:
1095
2112
return
1096
# Reschedule checker run
1097
gobject.source_remove(self.checker_initiator_tag)
1098
self.checker_initiator_tag = (gobject.timeout_add
1099
(value, self.start_checker))
1100
self.start_checker() # Start one now, too
2113
if self.enabled:
2114
# Reschedule checker run
2115
GLib.source_remove(self.checker_initiator_tag)
2116
self.checker_initiator_tag = GLib.timeout_add(
2117
value, self.start_checker)
2118
self.start_checker() # Start one now, too
1101
2119
1102
2120
# Checker - property
1103
@dbus_service_property(_interface, signature="s",
2121
@dbus_service_property(_interface,
2122
signature="s",
1104
2123
access="readwrite")
1105
2124
def Checker_dbus_property(self, value=None):
1106
2125
if value is None: # get
1107
2126
return dbus.String(self.checker_command)
1108
self.checker_command = value
1109
# Emit D-Bus signal
1110
self.PropertyChanged(dbus.String("Checker"),
1111
dbus.String(self.checker_command,
1112
variant_level=1))
1113
2127
self.checker_command = str(value)
2128
1114
2129
# CheckerRunning - property
1115
@dbus_service_property(_interface, signature="b",
2130
@dbus_service_property(_interface,
2131
signature="b",
1116
2132
access="readwrite")
1117
2133
def CheckerRunning_dbus_property(self, value=None):
1118
2134
if value is None: # get
1121
2137
self.start_checker()
1122
2138
else:
1123
2139
self.stop_checker()
1124
2140
1125
2141
# ObjectPath - property
2142
@dbus_annotations(
2143
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
2144
"org.freedesktop.DBus.Deprecated": "true"})
1126
2145
@dbus_service_property(_interface, signature="o", access="read")
1127
2146
def ObjectPath_dbus_property(self):
1128
return self.dbus_object_path # is already a dbus.ObjectPath
1129
2147
return self.dbus_object_path # is already a dbus.ObjectPath
2148
1130
2149
# Secret = property
1131
@dbus_service_property(_interface, signature="ay",
1132
access="write", byte_arrays=True)
2150
@dbus_annotations(
2151
{"org.freedesktop.DBus.Property.EmitsChangedSignal":
2152
"invalidates"})
2153
@dbus_service_property(_interface,
2154
signature="ay",
2155
access="write",
2156
byte_arrays=True)
1133
2157
def Secret_dbus_property(self, value):
1134
self.secret = str(value)
1135
2158
self.secret = bytes(value)
2159
1136
2160
del _interface
1137
2161
1138
2162
1141
2165
self._pipe = child_pipe
1142
2166
self._pipe.send(('init', fpr, address))
1143
2167
if not self._pipe.recv():
1144
raise KeyError()
2168
raise KeyError(fpr)
1145
2169
1146
2170
def __getattribute__(self, name):
1147
if(name == '_pipe'):
2171
if name == '_pipe':
1148
2172
return super(ProxyClient, self).__getattribute__(name)
1149
2173
self._pipe.send(('getattr', name))
1150
2174
data = self._pipe.recv()
1151
2175
if data[0] == 'data':
1152
2176
return data[1]
1153
2177
if data[0] == 'function':
2178
1154
2179
def func(*args, **kwargs):
1155
2180
self._pipe.send(('funcall', name, args, kwargs))
1156
2181
return self._pipe.recv()[1]
2182
1157
2183
return func
1158
2184
1159
2185
def __setattr__(self, name, value):
1160
if(name == '_pipe'):
2186
if name == '_pipe':
1161
2187
return super(ProxyClient, self).__setattr__(name, value)
1162
2188
self._pipe.send(('setattr', name, value))
1163
2189
1164
2190
1165
2191
class ClientHandler(socketserver.BaseRequestHandler, object):
1166
2192
"""A class to handle client connections.
1167
2193
1168
2194
Instantiated once for each connection to handle it.
1169
2195
Note: This will run in its own forked process."""
1170
2196
1171
2197
def handle(self):
1172
2198
with contextlib.closing(self.server.child_pipe) as child_pipe:
1173
2199
logger.info("TCP connection from: %s",
1174
unicode(self.client_address))
2200
str(self.client_address))
1175
2201
logger.debug("Pipe FD: %d",
1176
2202
self.server.child_pipe.fileno())
1177
2203
1178
session = (gnutls.connection
1179
.ClientSession(self.request,
1180
gnutls.connection
1181
.X509Credentials()))
1182
1183
# Note: gnutls.connection.X509Credentials is really a
1184
# generic GnuTLS certificate credentials object so long as
1185
# no X.509 keys are added to it. Therefore, we can use it
1186
# here despite using OpenPGP certificates.
1187
1188
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1189
# "+AES-256-CBC", "+SHA1",
1190
# "+COMP-NULL", "+CTYPE-OPENPGP",
1191
# "+DHE-DSS"))
2204
session = gnutls.ClientSession(self.request)
2205
2206
# priority = ':'.join(("NONE", "+VERS-TLS1.1",
2207
# "+AES-256-CBC", "+SHA1",
2208
# "+COMP-NULL", "+CTYPE-OPENPGP",
2209
# "+DHE-DSS"))
1192
2210
# Use a fallback default, since this MUST be set.
1193
2211
priority = self.server.gnutls_priority
1194
2212
if priority is None:
1195
2213
priority = "NORMAL"
1196
(gnutls.library.functions
1197
.gnutls_priority_set_direct(session._c_object,
1198
priority, None))
2214
gnutls.priority_set_direct(session._c_object,
2215
priority.encode("utf-8"),
2216
None)
1199
2217
1200
2218
# Start communication using the Mandos protocol
1201
2219
# Get protocol number
1203
2221
logger.debug("Protocol version: %r", line)
1204
2222
try:
1205
2223
if int(line.strip().split()[0]) > 1:
1206
raise RuntimeError
1207
except (ValueError, IndexError, RuntimeError), error:
2224
raise RuntimeError(line)
2225
except (ValueError, IndexError, RuntimeError) as error:
1208
2226
logger.error("Unknown protocol version: %s", error)
1209
2227
return
1210
2228
1211
2229
# Start GnuTLS connection
1212
2230
try:
1213
2231
session.handshake()
1214
except gnutls.errors.GNUTLSError, error:
2232
except gnutls.Error as error:
1215
2233
logger.warning("Handshake failed: %s", error)
1216
2234
# Do not run session.bye() here: the session is not
1217
2235
# established. Just abandon the request.
1221
2239
approval_required = False
1222
2240
try:
1223
2241
try:
1224
fpr = self.fingerprint(self.peer_certificate
1225
(session))
1226
except (TypeError, gnutls.errors.GNUTLSError), error:
2242
fpr = self.fingerprint(
2243
self.peer_certificate(session))
2244
except (TypeError, gnutls.Error) as error:
1227
2245
logger.warning("Bad certificate: %s", error)
1228
2246
return
1229
2247
logger.debug("Fingerprint: %s", fpr)
1233
2251
self.client_address)
1234
2252
except KeyError:
1235
2253
return
1236
2254
1237
2255
if client.approval_delay:
1238
2256
delay = client.approval_delay
1239
2257
client.approvals_pending += 1
1240
2258
approval_required = True
1241
2259
1242
2260
while True:
1243
2261
if not client.enabled:
1244
logger.warning("Client %s is disabled",
1245
client.name)
2262
logger.info("Client %s is disabled",
2263
client.name)
1246
2264
if self.server.use_dbus:
1247
2265
# Emit D-Bus signal
1248
client.Rejected("Disabled")
2266
client.Rejected("Disabled")
1249
2267
return
1250
1251
if client._approved or not client.approval_delay:
1252
#We are approved or approval is disabled
2268
2269
if client.approved or not client.approval_delay:
2270
# We are approved or approval is disabled
1253
2271
break
1254
elif client._approved is None:
2272
elif client.approved is None:
1255
2273
logger.info("Client %s needs approval",
1256
2274
client.name)
1257
2275
if self.server.use_dbus:
1258
2276
# Emit D-Bus signal
1259
2277
client.NeedApproval(
1260
client.approval_delay_milliseconds(),
1261
client.approved_by_default)
2278
client.approval_delay.total_seconds()
2279
* 1000, client.approved_by_default)
1262
2280
else:
1263
2281
logger.warning("Client %s was not approved",
1264
2282
client.name)
1266
2284
# Emit D-Bus signal
1267
2285
client.Rejected("Denied")
1268
2286
return
1269
1270
#wait until timeout or approved
1271
#x = float(client._timedelta_to_milliseconds(delay))
2287
2288
# wait until timeout or approved
1272
2289
time = datetime.datetime.now()
1273
2290
client.changedstate.acquire()
1274
client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))
2291
client.changedstate.wait(delay.total_seconds())
1275
2292
client.changedstate.release()
1276
2293
time2 = datetime.datetime.now()
1277
2294
if (time2 - time) >= delay:
1287
2304
break
1288
2305
else:
1289
2306
delay -= time2 - time
1290
1291
sent_size = 0
1292
while sent_size < len(client.secret):
1293
try:
1294
sent = session.send(client.secret[sent_size:])
1295
except (gnutls.errors.GNUTLSError), error:
1296
logger.warning("gnutls send failed")
1297
return
1298
logger.debug("Sent: %d, remaining: %d",
1299
sent, len(client.secret)
1300
- (sent_size + sent))
1301
sent_size += sent
2307
2308
try:
2309
session.send(client.secret)
2310
except gnutls.Error as error:
2311
logger.warning("gnutls send failed",
2312
exc_info=error)
2313
return
1302
2314
1303
2315
logger.info("Sending secret to %s", client.name)
1304
# bump the timeout as if seen
1305
client.checked_ok()
2316
# bump the timeout using extended_timeout
2317
client.bump_timeout(client.extended_timeout)
1306
2318
if self.server.use_dbus:
1307
2319
# Emit D-Bus signal
1308
2320
client.GotSecret()
1309
2321
1310
2322
finally:
1311
2323
if approval_required:
1312
2324
client.approvals_pending -= 1
1313
2325
try:
1314
2326
session.bye()
1315
except (gnutls.errors.GNUTLSError), error:
1316
logger.warning("GnuTLS bye failed")
1317
2327
except gnutls.Error as error:
2328
logger.warning("GnuTLS bye failed",
2329
exc_info=error)
2330
1318
2331
@staticmethod
1319
2332
def peer_certificate(session):
1320
2333
"Return the peer's OpenPGP certificate as a bytestring"
1321
2334
# If not an OpenPGP certificate...
1322
if (gnutls.library.functions
1323
.gnutls_certificate_type_get(session._c_object)
1324
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1325
# ...do the normal thing
1326
return session.peer_certificate
2335
if (gnutls.certificate_type_get(session._c_object)
2336
!= gnutls.CRT_OPENPGP):
2337
# ...return invalid data
2338
return b""
1327
2339
list_size = ctypes.c_uint(1)
1328
cert_list = (gnutls.library.functions
1329
.gnutls_certificate_get_peers
2340
cert_list = (gnutls.certificate_get_peers
1330
2341
(session._c_object, ctypes.byref(list_size)))
1331
2342
if not bool(cert_list) and list_size.value != 0:
1332
raise gnutls.errors.GNUTLSError("error getting peer"
1333
" certificate")
2343
raise gnutls.Error("error getting peer certificate")
1334
2344
if list_size.value == 0:
1335
2345
return None
1336
2346
cert = cert_list[0]
1337
2347
return ctypes.string_at(cert.data, cert.size)
1338
2348
1339
2349
@staticmethod
1340
2350
def fingerprint(openpgp):
1341
2351
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1342
2352
# New GnuTLS "datum" with the OpenPGP public key
1343
datum = (gnutls.library.types
1344
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1345
ctypes.POINTER
1346
(ctypes.c_ubyte)),
1347
ctypes.c_uint(len(openpgp))))
2353
datum = gnutls.datum_t(
2354
ctypes.cast(ctypes.c_char_p(openpgp),
2355
ctypes.POINTER(ctypes.c_ubyte)),
2356
ctypes.c_uint(len(openpgp)))
1348
2357
# New empty GnuTLS certificate
1349
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1350
(gnutls.library.functions
1351
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
2358
crt = gnutls.openpgp_crt_t()
2359
gnutls.openpgp_crt_init(ctypes.byref(crt))
1352
2360
# Import the OpenPGP public key into the certificate
1353
(gnutls.library.functions
1354
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1355
gnutls.library.constants
1356
.GNUTLS_OPENPGP_FMT_RAW))
2361
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2362
gnutls.OPENPGP_FMT_RAW)
1357
2363
# Verify the self signature in the key
1358
2364
crtverify = ctypes.c_uint()
1359
(gnutls.library.functions
1360
.gnutls_openpgp_crt_verify_self(crt, 0,
1361
ctypes.byref(crtverify)))
2365
gnutls.openpgp_crt_verify_self(crt, 0,
2366
ctypes.byref(crtverify))
1362
2367
if crtverify.value != 0:
1363
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1364
raise (gnutls.errors.CertificateSecurityError
1365
("Verify failed"))
2368
gnutls.openpgp_crt_deinit(crt)
2369
raise gnutls.CertificateSecurityError("Verify failed")
1366
2370
# New buffer for the fingerprint
1367
2371
buf = ctypes.create_string_buffer(20)
1368
2372
buf_len = ctypes.c_size_t()
1369
2373
# Get the fingerprint from the certificate into the buffer
1370
(gnutls.library.functions
1371
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1372
ctypes.byref(buf_len)))
2374
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2375
ctypes.byref(buf_len))
1373
2376
# Deinit the certificate
1374
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2377
gnutls.openpgp_crt_deinit(crt)
1375
2378
# Convert the buffer to a Python bytestring
1376
2379
fpr = ctypes.string_at(buf, buf_len.value)
1377
2380
# Convert the bytestring to hexadecimal notation
1378
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
2381
hex_fpr = binascii.hexlify(fpr).upper()
1379
2382
return hex_fpr
1380
2383
1381
2384
1382
2385
class MultiprocessingMixIn(object):
1383
2386
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2387
1384
2388
def sub_process_main(self, request, address):
1385
2389
try:
1386
2390
self.finish_request(request, address)
1387
except:
2391
except Exception:
1388
2392
self.handle_error(request, address)
1389
2393
self.close_request(request)
1390
2394
1391
2395
def process_request(self, request, address):
1392
2396
"""Start a new process to process the request."""
1393
multiprocessing.Process(target = self.sub_process_main,
1394
args = (request, address)).start()
2397
proc = multiprocessing.Process(target=self.sub_process_main,
2398
args=(request, address))
2399
proc.start()
2400
return proc
2401
1395
2402
1396
2403
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1397
2404
""" adds a pipe to the MixIn """
2405
1398
2406
def process_request(self, request, client_address):
1399
2407
"""Overrides and wraps the original process_request().
1400
2408
1401
2409
This function creates a new pipe in self.pipe
1402
2410
"""
1403
2411
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1404
2412
1405
super(MultiprocessingMixInWithPipe,
1406
self).process_request(request, client_address)
2413
proc = MultiprocessingMixIn.process_request(self, request,
2414
client_address)
1407
2415
self.child_pipe.close()
1408
self.add_pipe(parent_pipe)
2416
self.add_pipe(parent_pipe, proc)
1409
2417
1410
def add_pipe(self, parent_pipe):
2418
def add_pipe(self, parent_pipe, proc):
1411
2419
"""Dummy function; override as necessary"""
1412
raise NotImplementedError
2420
raise NotImplementedError()
2421
1413
2422
1414
2423
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1415
2424
socketserver.TCPServer, object):
1416
2425
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1417
2426
1418
2427
Attributes:
1419
2428
enabled: Boolean; whether this server is activated yet
1420
2429
interface: None or a network interface name (string)
1421
2430
use_ipv6: Boolean; to use IPv6 or not
1422
2431
"""
2432
1423
2433
def __init__(self, server_address, RequestHandlerClass,
1424
interface=None, use_ipv6=True):
2434
interface=None,
2435
use_ipv6=True,
2436
socketfd=None):
2437
"""If socketfd is set, use that file descriptor instead of
2438
creating a new one with socket.socket().
2439
"""
1425
2440
self.interface = interface
1426
2441
if use_ipv6:
1427
2442
self.address_family = socket.AF_INET6
2443
if socketfd is not None:
2444
# Save the file descriptor
2445
self.socketfd = socketfd
2446
# Save the original socket.socket() function
2447
self.socket_socket = socket.socket
2448
2449
# To implement --socket, we monkey patch socket.socket.
2450
#
2451
# (When socketserver.TCPServer is a new-style class, we
2452
# could make self.socket into a property instead of monkey
2453
# patching socket.socket.)
2454
#
2455
# Create a one-time-only replacement for socket.socket()
2456
@functools.wraps(socket.socket)
2457
def socket_wrapper(*args, **kwargs):
2458
# Restore original function so subsequent calls are
2459
# not affected.
2460
socket.socket = self.socket_socket
2461
del self.socket_socket
2462
# This time only, return a new socket object from the
2463
# saved file descriptor.
2464
return socket.fromfd(self.socketfd, *args, **kwargs)
2465
# Replace socket.socket() function with wrapper
2466
socket.socket = socket_wrapper
2467
# The socketserver.TCPServer.__init__ will call
2468
# socket.socket(), which might be our replacement,
2469
# socket_wrapper(), if socketfd was set.
1428
2470
socketserver.TCPServer.__init__(self, server_address,
1429
2471
RequestHandlerClass)
2472
1430
2473
def server_bind(self):
1431
2474
"""This overrides the normal server_bind() function
1432
2475
to bind to an interface if one was specified, and also NOT to
1433
2476
bind to an address or port if they were not specified."""
2477
global SO_BINDTODEVICE
1434
2478
if self.interface is not None:
1435
2479
if SO_BINDTODEVICE is None:
1436
logger.error("SO_BINDTODEVICE does not exist;"
1437
" cannot bind to interface %s",
1438
self.interface)
1439
else:
1440
try:
1441
self.socket.setsockopt(socket.SOL_SOCKET,
1442
SO_BINDTODEVICE,
1443
str(self.interface
1444
+ '\0'))
1445
except socket.error, error:
1446
if error[0] == errno.EPERM:
1447
logger.error("No permission to"
1448
" bind to interface %s",
1449
self.interface)
1450
elif error[0] == errno.ENOPROTOOPT:
1451
logger.error("SO_BINDTODEVICE not available;"
1452
" cannot bind to interface %s",
1453
self.interface)
1454
else:
1455
raise
2480
# Fall back to a hard-coded value which seems to be
2481
# common enough.
2482
logger.warning("SO_BINDTODEVICE not found, trying 25")
2483
SO_BINDTODEVICE = 25
2484
try:
2485
self.socket.setsockopt(
2486
socket.SOL_SOCKET, SO_BINDTODEVICE,
2487
(self.interface + "\0").encode("utf-8"))
2488
except socket.error as error:
2489
if error.errno == errno.EPERM:
2490
logger.error("No permission to bind to"
2491
" interface %s", self.interface)
2492
elif error.errno == errno.ENOPROTOOPT:
2493
logger.error("SO_BINDTODEVICE not available;"
2494
" cannot bind to interface %s",
2495
self.interface)
2496
elif error.errno == errno.ENODEV:
2497
logger.error("Interface %s does not exist,"
2498
" cannot bind", self.interface)
2499
else:
2500
raise
1456
2501
# Only bind(2) the socket if we really need to.
1457
2502
if self.server_address[0] or self.server_address[1]:
1458
2503
if not self.server_address[0]:
1459
2504
if self.address_family == socket.AF_INET6:
1460
any_address = "::" # in6addr_any
2505
any_address = "::" # in6addr_any
1461
2506
else:
1462
any_address = socket.INADDR_ANY
2507
any_address = "0.0.0.0" # INADDR_ANY
1463
2508
self.server_address = (any_address,
1464
2509
self.server_address[1])
1465
2510
elif not self.server_address[1]:
1466
self.server_address = (self.server_address[0],
1467
0)
2511
self.server_address = (self.server_address[0], 0)
1468
2512
# if self.interface:
1469
2513
# self.server_address = (self.server_address[0],
1470
2514
# 0, # port
1476
2520
1477
2521
class MandosServer(IPv6_TCPServer):
1478
2522
"""Mandos server.
1479
2523
1480
2524
Attributes:
1481
2525
clients: set of Client objects
1482
2526
gnutls_priority GnuTLS priority string
1483
2527
use_dbus: Boolean; to emit D-Bus signals or not
1484
1485
Assumes a gobject.MainLoop event loop.
2528
2529
Assumes a GLib.MainLoop event loop.
1486
2530
"""
2531
1487
2532
def __init__(self, server_address, RequestHandlerClass,
1488
interface=None, use_ipv6=True, clients=None,
1489
gnutls_priority=None, use_dbus=True):
2533
interface=None,
2534
use_ipv6=True,
2535
clients=None,
2536
gnutls_priority=None,
2537
use_dbus=True,
2538
socketfd=None):
1490
2539
self.enabled = False
1491
2540
self.clients = clients
1492
2541
if self.clients is None:
1493
self.clients = set()
2542
self.clients = {}
1494
2543
self.use_dbus = use_dbus
1495
2544
self.gnutls_priority = gnutls_priority
1496
2545
IPv6_TCPServer.__init__(self, server_address,
1497
2546
RequestHandlerClass,
1498
interface = interface,
1499
use_ipv6 = use_ipv6)
2547
interface=interface,
2548
use_ipv6=use_ipv6,
2549
socketfd=socketfd)
2550
1500
2551
def server_activate(self):
1501
2552
if self.enabled:
1502
2553
return socketserver.TCPServer.server_activate(self)
2554
1503
2555
def enable(self):
1504
2556
self.enabled = True
1505
def add_pipe(self, parent_pipe):
2557
2558
def add_pipe(self, parent_pipe, proc):
1506
2559
# Call "handle_ipc" for both data and EOF events
1507
gobject.io_add_watch(parent_pipe.fileno(),
1508
gobject.IO_IN | gobject.IO_HUP,
1509
functools.partial(self.handle_ipc,
1510
parent_pipe = parent_pipe))
1511
1512
def handle_ipc(self, source, condition, parent_pipe=None,
2560
GLib.io_add_watch(
2561
parent_pipe.fileno(),
2562
GLib.IO_IN | GLib.IO_HUP,
2563
functools.partial(self.handle_ipc,
2564
parent_pipe=parent_pipe,
2565
proc=proc))
2566
2567
def handle_ipc(self, source, condition,
2568
parent_pipe=None,
2569
proc=None,
1513
2570
client_object=None):
1514
condition_names = {
1515
gobject.IO_IN: "IN", # There is data to read.
1516
gobject.IO_OUT: "OUT", # Data can be written (without
1517
# blocking).
1518
gobject.IO_PRI: "PRI", # There is urgent data to read.
1519
gobject.IO_ERR: "ERR", # Error condition.
1520
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1521
# broken, usually for pipes and
1522
# sockets).
1523
}
1524
conditions_string = ' | '.join(name
1525
for cond, name in
1526
condition_names.iteritems()
1527
if cond & condition)
1528
# error or the other end of multiprocessing.Pipe has closed
1529
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
2571
# error, or the other end of multiprocessing.Pipe has closed
2572
if condition & (GLib.IO_ERR | GLib.IO_HUP):
2573
# Wait for other process to exit
2574
proc.join()
1530
2575
return False
1531
2576
1532
2577
# Read a request from the child
1533
2578
request = parent_pipe.recv()
1534
2579
command = request[0]
1535
2580
1536
2581
if command == 'init':
1537
fpr = request[1]
2582
fpr = request[1].decode("ascii")
1538
2583
address = request[2]
1539
1540
for c in self.clients:
2584
2585
for c in self.clients.values():
1541
2586
if c.fingerprint == fpr:
1542
2587
client = c
1543
2588
break
1544
2589
else:
1545
logger.warning("Client not found for fingerprint: %s, ad"
1546
"dress: %s", fpr, address)
2590
logger.info("Client not found for fingerprint: %s, ad"
2591
"dress: %s", fpr, address)
1547
2592
if self.use_dbus:
1548
2593
# Emit D-Bus signal
1549
mandos_dbus_service.ClientNotFound(fpr, address[0])
2594
mandos_dbus_service.ClientNotFound(fpr,
2595
address[0])
1550
2596
parent_pipe.send(False)
1551
2597
return False
1552
1553
gobject.io_add_watch(parent_pipe.fileno(),
1554
gobject.IO_IN | gobject.IO_HUP,
1555
functools.partial(self.handle_ipc,
1556
parent_pipe = parent_pipe,
1557
client_object = client))
2598
2599
GLib.io_add_watch(
2600
parent_pipe.fileno(),
2601
GLib.IO_IN | GLib.IO_HUP,
2602
functools.partial(self.handle_ipc,
2603
parent_pipe=parent_pipe,
2604
proc=proc,
2605
client_object=client))
1558
2606
parent_pipe.send(True)
1559
# remove the old hook in favor of the new above hook on same fileno
2607
# remove the old hook in favor of the new above hook on
2608
# same fileno
1560
2609
return False
1561
2610
if command == 'funcall':
1562
2611
funcname = request[1]
1563
2612
args = request[2]
1564
2613
kwargs = request[3]
1565
1566
parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))
2614
2615
parent_pipe.send(('data', getattr(client_object,
2616
funcname)(*args,
2617
**kwargs)))
1567
2618
1568
2619
if command == 'getattr':
1569
2620
attrname = request[1]
1570
if callable(client_object.__getattribute__(attrname)):
1571
parent_pipe.send(('function',))
2621
if isinstance(client_object.__getattribute__(attrname),
2622
collections.Callable):
2623
parent_pipe.send(('function', ))
1572
2624
else:
1573
parent_pipe.send(('data', client_object.__getattribute__(attrname)))
1574
2625
parent_pipe.send((
2626
'data', client_object.__getattribute__(attrname)))
2627
1575
2628
if command == 'setattr':
1576
2629
attrname = request[1]
1577
2630
value = request[2]
1580
2633
return True
1581
2634
1582
2635
2636
def rfc3339_duration_to_delta(duration):
2637
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2638
2639
>>> rfc3339_duration_to_delta("P7D")
2640
datetime.timedelta(7)
2641
>>> rfc3339_duration_to_delta("PT60S")
2642
datetime.timedelta(0, 60)
2643
>>> rfc3339_duration_to_delta("PT60M")
2644
datetime.timedelta(0, 3600)
2645
>>> rfc3339_duration_to_delta("PT24H")
2646
datetime.timedelta(1)
2647
>>> rfc3339_duration_to_delta("P1W")
2648
datetime.timedelta(7)
2649
>>> rfc3339_duration_to_delta("PT5M30S")
2650
datetime.timedelta(0, 330)
2651
>>> rfc3339_duration_to_delta("P1DT3M20S")
2652
datetime.timedelta(1, 200)
2653
"""
2654
2655
# Parsing an RFC 3339 duration with regular expressions is not
2656
# possible - there would have to be multiple places for the same
2657
# values, like seconds. The current code, while more esoteric, is
2658
# cleaner without depending on a parsing library. If Python had a
2659
# built-in library for parsing we would use it, but we'd like to
2660
# avoid excessive use of external libraries.
2661
2662
# New type for defining tokens, syntax, and semantics all-in-one
2663
Token = collections.namedtuple("Token", (
2664
"regexp", # To match token; if "value" is not None, must have
2665
# a "group" containing digits
2666
"value", # datetime.timedelta or None
2667
"followers")) # Tokens valid after this token
2668
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2669
# the "duration" ABNF definition in RFC 3339, Appendix A.
2670
token_end = Token(re.compile(r"$"), None, frozenset())
2671
token_second = Token(re.compile(r"(\d+)S"),
2672
datetime.timedelta(seconds=1),
2673
frozenset((token_end, )))
2674
token_minute = Token(re.compile(r"(\d+)M"),
2675
datetime.timedelta(minutes=1),
2676
frozenset((token_second, token_end)))
2677
token_hour = Token(re.compile(r"(\d+)H"),
2678
datetime.timedelta(hours=1),
2679
frozenset((token_minute, token_end)))
2680
token_time = Token(re.compile(r"T"),
2681
None,
2682
frozenset((token_hour, token_minute,
2683
token_second)))
2684
token_day = Token(re.compile(r"(\d+)D"),
2685
datetime.timedelta(days=1),
2686
frozenset((token_time, token_end)))
2687
token_month = Token(re.compile(r"(\d+)M"),
2688
datetime.timedelta(weeks=4),
2689
frozenset((token_day, token_end)))
2690
token_year = Token(re.compile(r"(\d+)Y"),
2691
datetime.timedelta(weeks=52),
2692
frozenset((token_month, token_end)))
2693
token_week = Token(re.compile(r"(\d+)W"),
2694
datetime.timedelta(weeks=1),
2695
frozenset((token_end, )))
2696
token_duration = Token(re.compile(r"P"), None,
2697
frozenset((token_year, token_month,
2698
token_day, token_time,
2699
token_week)))
2700
# Define starting values:
2701
# Value so far
2702
value = datetime.timedelta()
2703
found_token = None
2704
# Following valid tokens
2705
followers = frozenset((token_duration, ))
2706
# String left to parse
2707
s = duration
2708
# Loop until end token is found
2709
while found_token is not token_end:
2710
# Search for any currently valid tokens
2711
for token in followers:
2712
match = token.regexp.match(s)
2713
if match is not None:
2714
# Token found
2715
if token.value is not None:
2716
# Value found, parse digits
2717
factor = int(match.group(1), 10)
2718
# Add to value so far
2719
value += factor * token.value
2720
# Strip token from string
2721
s = token.regexp.sub("", s, 1)
2722
# Go to found token
2723
found_token = token
2724
# Set valid next tokens
2725
followers = found_token.followers
2726
break
2727
else:
2728
# No currently valid tokens were found
2729
raise ValueError("Invalid RFC 3339 duration: {!r}"
2730
.format(duration))
2731
# End token found
2732
return value
2733
2734
1583
2735
def string_to_delta(interval):
1584
2736
"""Parse a string and return a datetime.timedelta
1585
2737
1586
2738
>>> string_to_delta('7d')
1587
2739
datetime.timedelta(7)
1588
2740
>>> string_to_delta('60s')
1596
2748
>>> string_to_delta('5m 30s')
1597
2749
datetime.timedelta(0, 330)
1598
2750
"""
2751
2752
try:
2753
return rfc3339_duration_to_delta(interval)
2754
except ValueError:
2755
pass
2756
1599
2757
timevalue = datetime.timedelta(0)
1600
2758
for s in interval.split():
1601
2759
try:
1602
suffix = unicode(s[-1])
2760
suffix = s[-1]
1603
2761
value = int(s[:-1])
1604
2762
if suffix == "d":
1605
2763
delta = datetime.timedelta(value)
1612
2770
elif suffix == "w":
1613
2771
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1614
2772
else:
1615
raise ValueError("Unknown suffix %r" % suffix)
1616
except (ValueError, IndexError), e:
2773
raise ValueError("Unknown suffix {!r}".format(suffix))
2774
except IndexError as e:
1617
2775
raise ValueError(*(e.args))
1618
2776
timevalue += delta
1619
2777
return timevalue
1620
2778
1621
2779
1622
def if_nametoindex(interface):
1623
"""Call the C function if_nametoindex(), or equivalent
1624
1625
Note: This function cannot accept a unicode string."""
1626
global if_nametoindex
1627
try:
1628
if_nametoindex = (ctypes.cdll.LoadLibrary
1629
(ctypes.util.find_library("c"))
1630
.if_nametoindex)
1631
except (OSError, AttributeError):
1632
logger.warning("Doing if_nametoindex the hard way")
1633
def if_nametoindex(interface):
1634
"Get an interface index the hard way, i.e. using fcntl()"
1635
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1636
with contextlib.closing(socket.socket()) as s:
1637
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1638
struct.pack(str("16s16x"),
1639
interface))
1640
interface_index = struct.unpack(str("I"),
1641
ifreq[16:20])[0]
1642
return interface_index
1643
return if_nametoindex(interface)
1644
1645
1646
def daemon(nochdir = False, noclose = False):
2780
def daemon(nochdir=False, noclose=False):
1647
2781
"""See daemon(3). Standard BSD Unix function.
1648
2782
1649
2783
This should really exist as os.daemon, but it doesn't (yet)."""
1650
2784
if os.fork():
1651
2785
sys.exit()
1656
2790
sys.exit()
1657
2791
if not noclose:
1658
2792
# Close all standard open file descriptors
1659
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2793
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1660
2794
if not stat.S_ISCHR(os.fstat(null).st_mode):
1661
2795
raise OSError(errno.ENODEV,
1662
"%s not a character device"
1663
% os.path.devnull)
2796
"{} not a character device"
2797
.format(os.devnull))
1664
2798
os.dup2(null, sys.stdin.fileno())
1665
2799
os.dup2(null, sys.stdout.fileno())
1666
2800
os.dup2(null, sys.stderr.fileno())
1669
2803
1670
2804
1671
2805
def main():
1672
2806
1673
2807
##################################################################
1674
2808
# Parsing of options, both command line and config file
1675
1676
parser = optparse.OptionParser(version = "%%prog %s" % version)
1677
parser.add_option("-i", "--interface", type="string",
1678
metavar="IF", help="Bind to interface IF")
1679
parser.add_option("-a", "--address", type="string",
1680
help="Address to listen for requests on")
1681
parser.add_option("-p", "--port", type="int",
1682
help="Port number to receive requests on")
1683
parser.add_option("--check", action="store_true",
1684
help="Run self-test")
1685
parser.add_option("--debug", action="store_true",
1686
help="Debug mode; run in foreground and log to"
1687
" terminal")
1688
parser.add_option("--debuglevel", type="string", metavar="LEVEL",
1689
help="Debug level for stdout output")
1690
parser.add_option("--priority", type="string", help="GnuTLS"
1691
" priority string (see GnuTLS documentation)")
1692
parser.add_option("--servicename", type="string",
1693
metavar="NAME", help="Zeroconf service name")
1694
parser.add_option("--configdir", type="string",
1695
default="/etc/mandos", metavar="DIR",
1696
help="Directory to search for configuration"
1697
" files")
1698
parser.add_option("--no-dbus", action="store_false",
1699
dest="use_dbus", help="Do not provide D-Bus"
1700
" system bus interface")
1701
parser.add_option("--no-ipv6", action="store_false",
1702
dest="use_ipv6", help="Do not use IPv6")
1703
options = parser.parse_args()[0]
1704
2809
2810
parser = argparse.ArgumentParser()
2811
parser.add_argument("-v", "--version", action="version",
2812
version="%(prog)s {}".format(version),
2813
help="show version number and exit")
2814
parser.add_argument("-i", "--interface", metavar="IF",
2815
help="Bind to interface IF")
2816
parser.add_argument("-a", "--address",
2817
help="Address to listen for requests on")
2818
parser.add_argument("-p", "--port", type=int,
2819
help="Port number to receive requests on")
2820
parser.add_argument("--check", action="store_true",
2821
help="Run self-test")
2822
parser.add_argument("--debug", action="store_true",
2823
help="Debug mode; run in foreground and log"
2824
" to terminal", default=None)
2825
parser.add_argument("--debuglevel", metavar="LEVEL",
2826
help="Debug level for stdout output")
2827
parser.add_argument("--priority", help="GnuTLS"
2828
" priority string (see GnuTLS documentation)")
2829
parser.add_argument("--servicename",
2830
metavar="NAME", help="Zeroconf service name")
2831
parser.add_argument("--configdir",
2832
default="/etc/mandos", metavar="DIR",
2833
help="Directory to search for configuration"
2834
" files")
2835
parser.add_argument("--no-dbus", action="store_false",
2836
dest="use_dbus", help="Do not provide D-Bus"
2837
" system bus interface", default=None)
2838
parser.add_argument("--no-ipv6", action="store_false",
2839
dest="use_ipv6", help="Do not use IPv6",
2840
default=None)
2841
parser.add_argument("--no-restore", action="store_false",
2842
dest="restore", help="Do not restore stored"
2843
" state", default=None)
2844
parser.add_argument("--socket", type=int,
2845
help="Specify a file descriptor to a network"
2846
" socket to use instead of creating one")
2847
parser.add_argument("--statedir", metavar="DIR",
2848
help="Directory to save/restore state in")
2849
parser.add_argument("--foreground", action="store_true",
2850
help="Run in foreground", default=None)
2851
parser.add_argument("--no-zeroconf", action="store_false",
2852
dest="zeroconf", help="Do not use Zeroconf",
2853
default=None)
2854
2855
options = parser.parse_args()
2856
1705
2857
if options.check:
1706
2858
import doctest
1707
doctest.testmod()
1708
sys.exit()
1709
2859
fail_count, test_count = doctest.testmod()
2860
sys.exit(os.EX_OK if fail_count == 0 else 1)
2861
1710
2862
# Default values for config file for server-global settings
1711
server_defaults = { "interface": "",
1712
"address": "",
1713
"port": "",
1714
"debug": "False",
1715
"priority":
1716
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1717
"servicename": "Mandos",
1718
"use_dbus": "True",
1719
"use_ipv6": "True",
1720
"debuglevel": "",
1721
}
1722
2863
server_defaults = {"interface": "",
2864
"address": "",
2865
"port": "",
2866
"debug": "False",
2867
"priority":
2868
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2869
":+SIGN-DSA-SHA256",
2870
"servicename": "Mandos",
2871
"use_dbus": "True",
2872
"use_ipv6": "True",
2873
"debuglevel": "",
2874
"restore": "True",
2875
"socket": "",
2876
"statedir": "/var/lib/mandos",
2877
"foreground": "False",
2878
"zeroconf": "True",
2879
}
2880
1723
2881
# Parse config file for server-global settings
1724
2882
server_config = configparser.SafeConfigParser(server_defaults)
1725
2883
del server_defaults
1726
server_config.read(os.path.join(options.configdir,
1727
"mandos.conf"))
2884
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1728
2885
# Convert the SafeConfigParser object to a dict
1729
2886
server_settings = server_config.defaults()
1730
2887
# Use the appropriate methods on the non-string config options
1731
for option in ("debug", "use_dbus", "use_ipv6"):
2888
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2889
"foreground", "zeroconf"):
1732
2890
server_settings[option] = server_config.getboolean("DEFAULT",
1733
2891
option)
1734
2892
if server_settings["port"]:
1735
2893
server_settings["port"] = server_config.getint("DEFAULT",
1736
2894
"port")
2895
if server_settings["socket"]:
2896
server_settings["socket"] = server_config.getint("DEFAULT",
2897
"socket")
2898
# Later, stdin will, and stdout and stderr might, be dup'ed
2899
# over with an opened os.devnull. But we don't want this to
2900
# happen with a supplied network socket.
2901
if 0 <= server_settings["socket"] <= 2:
2902
server_settings["socket"] = os.dup(server_settings
2903
["socket"])
1737
2904
del server_config
1738
2905
1739
2906
# Override the settings from the config file with command line
1740
2907
# options, if set.
1741
2908
for option in ("interface", "address", "port", "debug",
1742
"priority", "servicename", "configdir",
1743
"use_dbus", "use_ipv6", "debuglevel"):
2909
"priority", "servicename", "configdir", "use_dbus",
2910
"use_ipv6", "debuglevel", "restore", "statedir",
2911
"socket", "foreground", "zeroconf"):
1744
2912
value = getattr(options, option)
1745
2913
if value is not None:
1746
2914
server_settings[option] = value
1747
2915
del options
1748
2916
# Force all strings to be unicode
1749
2917
for option in server_settings.keys():
1750
if type(server_settings[option]) is str:
1751
server_settings[option] = unicode(server_settings[option])
2918
if isinstance(server_settings[option], bytes):
2919
server_settings[option] = (server_settings[option]
2920
.decode("utf-8"))
2921
# Force all boolean options to be boolean
2922
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2923
"foreground", "zeroconf"):
2924
server_settings[option] = bool(server_settings[option])
2925
# Debug implies foreground
2926
if server_settings["debug"]:
2927
server_settings["foreground"] = True
1752
2928
# Now we have our good server settings in "server_settings"
1753
2929
1754
2930
##################################################################
1755
2931
2932
if (not server_settings["zeroconf"]
2933
and not (server_settings["port"]
2934
or server_settings["socket"] != "")):
2935
parser.error("Needs port or socket to work without Zeroconf")
2936
1756
2937
# For convenience
1757
2938
debug = server_settings["debug"]
1758
2939
debuglevel = server_settings["debuglevel"]
1759
2940
use_dbus = server_settings["use_dbus"]
1760
2941
use_ipv6 = server_settings["use_ipv6"]
2942
stored_state_path = os.path.join(server_settings["statedir"],
2943
stored_state_file)
2944
foreground = server_settings["foreground"]
2945
zeroconf = server_settings["zeroconf"]
2946
2947
if debug:
2948
initlogger(debug, logging.DEBUG)
2949
else:
2950
if not debuglevel:
2951
initlogger(debug)
2952
else:
2953
level = getattr(logging, debuglevel.upper())
2954
initlogger(debug, level)
1761
2955
1762
2956
if server_settings["servicename"] != "Mandos":
1763
syslogger.setFormatter(logging.Formatter
1764
('Mandos (%s) [%%(process)d]:'
1765
' %%(levelname)s: %%(message)s'
1766
% server_settings["servicename"]))
1767
2957
syslogger.setFormatter(
2958
logging.Formatter('Mandos ({}) [%(process)d]:'
2959
' %(levelname)s: %(message)s'.format(
2960
server_settings["servicename"])))
2961
1768
2962
# Parse config file with clients
1769
client_defaults = { "timeout": "1h",
1770
"interval": "5m",
1771
"checker": "fping -q -- %%(host)s",
1772
"host": "",
1773
"approval_delay": "0s",
1774
"approval_duration": "1s",
1775
}
1776
client_config = configparser.SafeConfigParser(client_defaults)
2963
client_config = configparser.SafeConfigParser(Client
2964
.client_defaults)
1777
2965
client_config.read(os.path.join(server_settings["configdir"],
1778
2966
"clients.conf"))
1779
2967
1780
2968
global mandos_dbus_service
1781
2969
mandos_dbus_service = None
1782
1783
tcp_server = MandosServer((server_settings["address"],
1784
server_settings["port"]),
1785
ClientHandler,
1786
interface=(server_settings["interface"]
1787
or None),
1788
use_ipv6=use_ipv6,
1789
gnutls_priority=
1790
server_settings["priority"],
1791
use_dbus=use_dbus)
1792
if not debug:
1793
pidfilename = "/var/run/mandos.pid"
1794
try:
1795
pidfile = open(pidfilename, "w")
1796
except IOError:
1797
logger.error("Could not open file %r", pidfilename)
1798
1799
try:
1800
uid = pwd.getpwnam("_mandos").pw_uid
1801
gid = pwd.getpwnam("_mandos").pw_gid
1802
except KeyError:
1803
try:
1804
uid = pwd.getpwnam("mandos").pw_uid
1805
gid = pwd.getpwnam("mandos").pw_gid
2970
2971
socketfd = None
2972
if server_settings["socket"] != "":
2973
socketfd = server_settings["socket"]
2974
tcp_server = MandosServer(
2975
(server_settings["address"], server_settings["port"]),
2976
ClientHandler,
2977
interface=(server_settings["interface"] or None),
2978
use_ipv6=use_ipv6,
2979
gnutls_priority=server_settings["priority"],
2980
use_dbus=use_dbus,
2981
socketfd=socketfd)
2982
if not foreground:
2983
pidfilename = "/run/mandos.pid"
2984
if not os.path.isdir("/run/."):
2985
pidfilename = "/var/run/mandos.pid"
2986
pidfile = None
2987
try:
2988
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
2989
except IOError as e:
2990
logger.error("Could not open file %r", pidfilename,
2991
exc_info=e)
2992
2993
for name, group in (("_mandos", "_mandos"),
2994
("mandos", "mandos"),
2995
("nobody", "nogroup")):
2996
try:
2997
uid = pwd.getpwnam(name).pw_uid
2998
gid = pwd.getpwnam(group).pw_gid
2999
break
1806
3000
except KeyError:
1807
try:
1808
uid = pwd.getpwnam("nobody").pw_uid
1809
gid = pwd.getpwnam("nobody").pw_gid
1810
except KeyError:
1811
uid = 65534
1812
gid = 65534
3001
continue
3002
else:
3003
uid = 65534
3004
gid = 65534
1813
3005
try:
1814
3006
os.setgid(gid)
1815
3007
os.setuid(uid)
1816
except OSError, error:
1817
if error[0] != errno.EPERM:
1818
raise error
1819
1820
if not debug and not debuglevel:
1821
syslogger.setLevel(logging.WARNING)
1822
console.setLevel(logging.WARNING)
1823
if debuglevel:
1824
level = getattr(logging, debuglevel.upper())
1825
syslogger.setLevel(level)
1826
console.setLevel(level)
3008
if debug:
3009
logger.debug("Did setuid/setgid to {}:{}".format(uid,
3010
gid))
3011
except OSError as error:
3012
logger.warning("Failed to setuid/setgid to {}:{}: {}"
3013
.format(uid, gid, os.strerror(error.errno)))
3014
if error.errno != errno.EPERM:
3015
raise
1827
3016
1828
3017
if debug:
1829
3018
# Enable all possible GnuTLS debugging
1830
3019
1831
3020
# "Use a log level over 10 to enable all debugging options."
1832
3021
# - GnuTLS manual
1833
gnutls.library.functions.gnutls_global_set_log_level(11)
1834
1835
@gnutls.library.types.gnutls_log_func
3022
gnutls.global_set_log_level(11)
3023
3024
@gnutls.log_func
1836
3025
def debug_gnutls(level, string):
1837
3026
logger.debug("GnuTLS: %s", string[:-1])
1838
1839
(gnutls.library.functions
1840
.gnutls_global_set_log_function(debug_gnutls))
1841
3027
3028
gnutls.global_set_log_function(debug_gnutls)
3029
1842
3030
# Redirect stdin so all checkers get /dev/null
1843
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
3031
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1844
3032
os.dup2(null, sys.stdin.fileno())
1845
3033
if null > 2:
1846
3034
os.close(null)
1847
else:
1848
# No console logging
1849
logger.removeHandler(console)
1850
3035
1851
3036
# Need to fork before connecting to D-Bus
1852
if not debug:
3037
if not foreground:
1853
3038
# Close all input and output, do double fork, etc.
1854
3039
daemon()
1855
3040
3041
# multiprocessing will use threads, so before we use GLib we need
3042
# to inform GLib that threads will be used.
3043
GLib.threads_init()
3044
1856
3045
global main_loop
1857
3046
# From the Avahi example code
1858
DBusGMainLoop(set_as_default=True )
1859
main_loop = gobject.MainLoop()
3047
DBusGMainLoop(set_as_default=True)
3048
main_loop = GLib.MainLoop()
1860
3049
bus = dbus.SystemBus()
1861
3050
# End of Avahi example code
1862
3051
if use_dbus:
1863
3052
try:
1864
bus_name = dbus.service.BusName("se.bsnet.fukt.Mandos",
1865
bus, do_not_queue=True)
1866
except dbus.exceptions.NameExistsException, e:
1867
logger.error(unicode(e) + ", disabling D-Bus")
3053
bus_name = dbus.service.BusName("se.recompile.Mandos",
3054
bus,
3055
do_not_queue=True)
3056
old_bus_name = dbus.service.BusName(
3057
"se.bsnet.fukt.Mandos", bus,
3058
do_not_queue=True)
3059
except dbus.exceptions.DBusException as e:
3060
logger.error("Disabling D-Bus:", exc_info=e)
1868
3061
use_dbus = False
1869
3062
server_settings["use_dbus"] = False
1870
3063
tcp_server.use_dbus = False
1871
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1872
service = AvahiService(name = server_settings["servicename"],
1873
servicetype = "_mandos._tcp",
1874
protocol = protocol, bus = bus)
1875
if server_settings["interface"]:
1876
service.interface = (if_nametoindex
1877
(str(server_settings["interface"])))
1878
3064
if zeroconf:
3065
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3066
service = AvahiServiceToSyslog(
3067
name=server_settings["servicename"],
3068
servicetype="_mandos._tcp",
3069
protocol=protocol,
3070
bus=bus)
3071
if server_settings["interface"]:
3072
service.interface = if_nametoindex(
3073
server_settings["interface"].encode("utf-8"))
3074
1879
3075
global multiprocessing_manager
1880
3076
multiprocessing_manager = multiprocessing.Manager()
1881
3077
1882
3078
client_class = Client
1883
3079
if use_dbus:
1884
client_class = functools.partial(ClientDBus, bus = bus)
1885
def client_config_items(config, section):
1886
special_settings = {
1887
"approved_by_default":
1888
lambda: config.getboolean(section,
1889
"approved_by_default"),
1890
}
1891
for name, value in config.items(section):
3080
client_class = functools.partial(ClientDBus, bus=bus)
3081
3082
client_settings = Client.config_parser(client_config)
3083
old_client_settings = {}
3084
clients_data = {}
3085
3086
# This is used to redirect stdout and stderr for checker processes
3087
global wnull
3088
wnull = open(os.devnull, "w") # A writable /dev/null
3089
# Only used if server is running in foreground but not in debug
3090
# mode
3091
if debug or not foreground:
3092
wnull.close()
3093
3094
# Get client data and settings from last running state.
3095
if server_settings["restore"]:
3096
try:
3097
with open(stored_state_path, "rb") as stored_state:
3098
if sys.version_info.major == 2:
3099
clients_data, old_client_settings = pickle.load(
3100
stored_state)
3101
else:
3102
bytes_clients_data, bytes_old_client_settings = (
3103
pickle.load(stored_state, encoding="bytes"))
3104
# Fix bytes to strings
3105
# clients_data
3106
# .keys()
3107
clients_data = {(key.decode("utf-8")
3108
if isinstance(key, bytes)
3109
else key): value
3110
for key, value in
3111
bytes_clients_data.items()}
3112
del bytes_clients_data
3113
for key in clients_data:
3114
value = {(k.decode("utf-8")
3115
if isinstance(k, bytes) else k): v
3116
for k, v in
3117
clients_data[key].items()}
3118
clients_data[key] = value
3119
# .client_structure
3120
value["client_structure"] = [
3121
(s.decode("utf-8")
3122
if isinstance(s, bytes)
3123
else s) for s in
3124
value["client_structure"]]
3125
# .name & .host
3126
for k in ("name", "host"):
3127
if isinstance(value[k], bytes):
3128
value[k] = value[k].decode("utf-8")
3129
# old_client_settings
3130
# .keys()
3131
old_client_settings = {
3132
(key.decode("utf-8")
3133
if isinstance(key, bytes)
3134
else key): value
3135
for key, value in
3136
bytes_old_client_settings.items()}
3137
del bytes_old_client_settings
3138
# .host
3139
for value in old_client_settings.values():
3140
if isinstance(value["host"], bytes):
3141
value["host"] = (value["host"]
3142
.decode("utf-8"))
3143
os.remove(stored_state_path)
3144
except IOError as e:
3145
if e.errno == errno.ENOENT:
3146
logger.warning("Could not load persistent state:"
3147
" {}".format(os.strerror(e.errno)))
3148
else:
3149
logger.critical("Could not load persistent state:",
3150
exc_info=e)
3151
raise
3152
except EOFError as e:
3153
logger.warning("Could not load persistent state: "
3154
"EOFError:",
3155
exc_info=e)
3156
3157
with PGPEngine() as pgp:
3158
for client_name, client in clients_data.items():
3159
# Skip removed clients
3160
if client_name not in client_settings:
3161
continue
3162
3163
# Decide which value to use after restoring saved state.
3164
# We have three different values: Old config file,
3165
# new config file, and saved state.
3166
# New config value takes precedence if it differs from old
3167
# config value, otherwise use saved state.
3168
for name, value in client_settings[client_name].items():
3169
try:
3170
# For each value in new config, check if it
3171
# differs from the old config value (Except for
3172
# the "secret" attribute)
3173
if (name != "secret"
3174
and (value !=
3175
old_client_settings[client_name][name])):
3176
client[name] = value
3177
except KeyError:
3178
pass
3179
3180
# Clients who has passed its expire date can still be
3181
# enabled if its last checker was successful. A Client
3182
# whose checker succeeded before we stored its state is
3183
# assumed to have successfully run all checkers during
3184
# downtime.
3185
if client["enabled"]:
3186
if datetime.datetime.utcnow() >= client["expires"]:
3187
if not client["last_checked_ok"]:
3188
logger.warning(
3189
"disabling client {} - Client never "
3190
"performed a successful checker".format(
3191
client_name))
3192
client["enabled"] = False
3193
elif client["last_checker_status"] != 0:
3194
logger.warning(
3195
"disabling client {} - Client last"
3196
" checker failed with error code"
3197
" {}".format(
3198
client_name,
3199
client["last_checker_status"]))
3200
client["enabled"] = False
3201
else:
3202
client["expires"] = (
3203
datetime.datetime.utcnow()
3204
+ client["timeout"])
3205
logger.debug("Last checker succeeded,"
3206
" keeping {} enabled".format(
3207
client_name))
1892
3208
try:
1893
yield (name, special_settings[name]())
1894
except KeyError:
1895
yield (name, value)
1896
1897
tcp_server.clients.update(set(
1898
client_class(name = section,
1899
config= dict(client_config_items(
1900
client_config, section)))
1901
for section in client_config.sections()))
3209
client["secret"] = pgp.decrypt(
3210
client["encrypted_secret"],
3211
client_settings[client_name]["secret"])
3212
except PGPError:
3213
# If decryption fails, we use secret from new settings
3214
logger.debug("Failed to decrypt {} old secret".format(
3215
client_name))
3216
client["secret"] = (client_settings[client_name]
3217
["secret"])
3218
3219
# Add/remove clients based on new changes made to config
3220
for client_name in (set(old_client_settings)
3221
- set(client_settings)):
3222
del clients_data[client_name]
3223
for client_name in (set(client_settings)
3224
- set(old_client_settings)):
3225
clients_data[client_name] = client_settings[client_name]
3226
3227
# Create all client objects
3228
for client_name, client in clients_data.items():
3229
tcp_server.clients[client_name] = client_class(
3230
name=client_name,
3231
settings=client,
3232
server_settings=server_settings)
3233
1902
3234
if not tcp_server.clients:
1903
3235
logger.warning("No clients defined")
1904
1905
if not debug:
1906
try:
1907
with pidfile:
1908
pid = os.getpid()
1909
pidfile.write(str(pid) + "\n".encode("utf-8"))
1910
del pidfile
1911
except IOError:
1912
logger.error("Could not write to file %r with PID %d",
1913
pidfilename, pid)
1914
except NameError:
1915
# "pidfile" was never created
1916
pass
3236
3237
if not foreground:
3238
if pidfile is not None:
3239
pid = os.getpid()
3240
try:
3241
with pidfile:
3242
print(pid, file=pidfile)
3243
except IOError:
3244
logger.error("Could not write to file %r with PID %d",
3245
pidfilename, pid)
3246
del pidfile
1917
3247
del pidfilename
1918
1919
signal.signal(signal.SIGINT, signal.SIG_IGN)
1920
1921
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1922
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1923
3248
3249
for termsig in (signal.SIGHUP, signal.SIGTERM):
3250
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3251
lambda: main_loop.quit() and False)
3252
1924
3253
if use_dbus:
1925
class MandosDBusService(dbus.service.Object):
3254
3255
@alternate_dbus_interfaces(
3256
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3257
class MandosDBusService(DBusObjectWithObjectManager):
1926
3258
"""A D-Bus proxy object"""
3259
1927
3260
def __init__(self):
1928
3261
dbus.service.Object.__init__(self, bus, "/")
1929
_interface = "se.bsnet.fukt.Mandos"
1930
3262
3263
_interface = "se.recompile.Mandos"
3264
1931
3265
@dbus.service.signal(_interface, signature="o")
1932
3266
def ClientAdded(self, objpath):
1933
3267
"D-Bus signal"
1934
3268
pass
1935
3269
1936
3270
@dbus.service.signal(_interface, signature="ss")
1937
3271
def ClientNotFound(self, fingerprint, address):
1938
3272
"D-Bus signal"
1939
3273
pass
1940
3274
3275
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3276
"true"})
1941
3277
@dbus.service.signal(_interface, signature="os")
1942
3278
def ClientRemoved(self, objpath, name):
1943
3279
"D-Bus signal"
1944
3280
pass
1945
3281
3282
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3283
"true"})
1946
3284
@dbus.service.method(_interface, out_signature="ao")
1947
3285
def GetAllClients(self):
1948
3286
"D-Bus method"
1949
return dbus.Array(c.dbus_object_path
1950
for c in tcp_server.clients)
1951
3287
return dbus.Array(c.dbus_object_path for c in
3288
tcp_server.clients.values())
3289
3290
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3291
"true"})
1952
3292
@dbus.service.method(_interface,
1953
3293
out_signature="a{oa{sv}}")
1954
3294
def GetAllClientsWithProperties(self):
1955
3295
"D-Bus method"
1956
3296
return dbus.Dictionary(
1957
((c.dbus_object_path, c.GetAll(""))
1958
for c in tcp_server.clients),
3297
{c.dbus_object_path: c.GetAll(
3298
"se.recompile.Mandos.Client")
3299
for c in tcp_server.clients.values()},
1959
3300
signature="oa{sv}")
1960
3301
1961
3302
@dbus.service.method(_interface, in_signature="o")
1962
3303
def RemoveClient(self, object_path):
1963
3304
"D-Bus method"
1964
for c in tcp_server.clients:
3305
for c in tcp_server.clients.values():
1965
3306
if c.dbus_object_path == object_path:
1966
tcp_server.clients.remove(c)
3307
del tcp_server.clients[c.name]
1967
3308
c.remove_from_connection()
1968
# Don't signal anything except ClientRemoved
3309
# Don't signal the disabling
1969
3310
c.disable(quiet=True)
1970
# Emit D-Bus signal
1971
self.ClientRemoved(object_path, c.name)
3311
# Emit D-Bus signal for removal
3312
self.client_removed_signal(c)
1972
3313
return
1973
3314
raise KeyError(object_path)
1974
3315
1975
3316
del _interface
1976
3317
3318
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3319
out_signature="a{oa{sa{sv}}}")
3320
def GetManagedObjects(self):
3321
"""D-Bus method"""
3322
return dbus.Dictionary(
3323
{client.dbus_object_path:
3324
dbus.Dictionary(
3325
{interface: client.GetAll(interface)
3326
for interface in
3327
client._get_all_interface_names()})
3328
for client in tcp_server.clients.values()})
3329
3330
def client_added_signal(self, client):
3331
"""Send the new standard signal and the old signal"""
3332
if use_dbus:
3333
# New standard signal
3334
self.InterfacesAdded(
3335
client.dbus_object_path,
3336
dbus.Dictionary(
3337
{interface: client.GetAll(interface)
3338
for interface in
3339
client._get_all_interface_names()}))
3340
# Old signal
3341
self.ClientAdded(client.dbus_object_path)
3342
3343
def client_removed_signal(self, client):
3344
"""Send the new standard signal and the old signal"""
3345
if use_dbus:
3346
# New standard signal
3347
self.InterfacesRemoved(
3348
client.dbus_object_path,
3349
client._get_all_interface_names())
3350
# Old signal
3351
self.ClientRemoved(client.dbus_object_path,
3352
client.name)
3353
1977
3354
mandos_dbus_service = MandosDBusService()
1978
3355
3356
# Save modules to variables to exempt the modules from being
3357
# unloaded before the function registered with atexit() is run.
3358
mp = multiprocessing
3359
wn = wnull
3360
1979
3361
def cleanup():
1980
3362
"Cleanup function; run on exit"
1981
service.cleanup()
1982
3363
if zeroconf:
3364
service.cleanup()
3365
3366
mp.active_children()
3367
wn.close()
3368
if not (tcp_server.clients or client_settings):
3369
return
3370
3371
# Store client before exiting. Secrets are encrypted with key
3372
# based on what config file has. If config file is
3373
# removed/edited, old secret will thus be unrecovable.
3374
clients = {}
3375
with PGPEngine() as pgp:
3376
for client in tcp_server.clients.values():
3377
key = client_settings[client.name]["secret"]
3378
client.encrypted_secret = pgp.encrypt(client.secret,
3379
key)
3380
client_dict = {}
3381
3382
# A list of attributes that can not be pickled
3383
# + secret.
3384
exclude = {"bus", "changedstate", "secret",
3385
"checker", "server_settings"}
3386
for name, typ in inspect.getmembers(dbus.service
3387
.Object):
3388
exclude.add(name)
3389
3390
client_dict["encrypted_secret"] = (client
3391
.encrypted_secret)
3392
for attr in client.client_structure:
3393
if attr not in exclude:
3394
client_dict[attr] = getattr(client, attr)
3395
3396
clients[client.name] = client_dict
3397
del client_settings[client.name]["secret"]
3398
3399
try:
3400
with tempfile.NamedTemporaryFile(
3401
mode='wb',
3402
suffix=".pickle",
3403
prefix='clients-',
3404
dir=os.path.dirname(stored_state_path),
3405
delete=False) as stored_state:
3406
pickle.dump((clients, client_settings), stored_state,
3407
protocol=2)
3408
tempname = stored_state.name
3409
os.rename(tempname, stored_state_path)
3410
except (IOError, OSError) as e:
3411
if not debug:
3412
try:
3413
os.remove(tempname)
3414
except NameError:
3415
pass
3416
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
3417
logger.warning("Could not save persistent state: {}"
3418
.format(os.strerror(e.errno)))
3419
else:
3420
logger.warning("Could not save persistent state:",
3421
exc_info=e)
3422
raise
3423
3424
# Delete all clients, and settings from config
1983
3425
while tcp_server.clients:
1984
client = tcp_server.clients.pop()
3426
name, client = tcp_server.clients.popitem()
1985
3427
if use_dbus:
1986
3428
client.remove_from_connection()
1987
client.disable_hook = None
1988
# Don't signal anything except ClientRemoved
3429
# Don't signal the disabling
1989
3430
client.disable(quiet=True)
3431
# Emit D-Bus signal for removal
1990
3432
if use_dbus:
1991
# Emit D-Bus signal
1992
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
1993
client.name)
1994
3433
mandos_dbus_service.client_removed_signal(client)
3434
client_settings.clear()
3435
1995
3436
atexit.register(cleanup)
1996
1997
for client in tcp_server.clients:
3437
3438
for client in tcp_server.clients.values():
1998
3439
if use_dbus:
1999
# Emit D-Bus signal
2000
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2001
client.enable()
2002
3440
# Emit D-Bus signal for adding
3441
mandos_dbus_service.client_added_signal(client)
3442
# Need to initiate checking of clients
3443
if client.enabled:
3444
client.init_checker()
3445
2003
3446
tcp_server.enable()
2004
3447
tcp_server.server_activate()
2005
3448
2006
3449
# Find out what port we got
2007
service.port = tcp_server.socket.getsockname()[1]
3450
if zeroconf:
3451
service.port = tcp_server.socket.getsockname()[1]
2008
3452
if use_ipv6:
2009
3453
logger.info("Now listening on address %r, port %d,"
2010
" flowinfo %d, scope_id %d"
2011
% tcp_server.socket.getsockname())
3454
" flowinfo %d, scope_id %d",
3455
*tcp_server.socket.getsockname())
2012
3456
else: # IPv4
2013
logger.info("Now listening on address %r, port %d"
2014
% tcp_server.socket.getsockname())
2015
2016
#service.interface = tcp_server.socket.getsockname()[3]
2017
3457
logger.info("Now listening on address %r, port %d",
3458
*tcp_server.socket.getsockname())
3459
3460
# service.interface = tcp_server.socket.getsockname()[3]
3461
2018
3462
try:
2019
# From the Avahi example code
2020
try:
2021
service.activate()
2022
except dbus.exceptions.DBusException, error:
2023
logger.critical("DBusException: %s", error)
2024
cleanup()
2025
sys.exit(1)
2026
# End of Avahi example code
2027
2028
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2029
lambda *args, **kwargs:
2030
(tcp_server.handle_request
2031
(*args[2:], **kwargs) or True))
2032
3463
if zeroconf:
3464
# From the Avahi example code
3465
try:
3466
service.activate()
3467
except dbus.exceptions.DBusException as error:
3468
logger.critical("D-Bus Exception", exc_info=error)
3469
cleanup()
3470
sys.exit(1)
3471
# End of Avahi example code
3472
3473
GLib.io_add_watch(tcp_server.fileno(), GLib.IO_IN,
3474
lambda *args, **kwargs:
3475
(tcp_server.handle_request
3476
(*args[2:], **kwargs) or True))
3477
2033
3478
logger.debug("Starting main loop")
2034
3479
main_loop.run()
2035
except AvahiError, error:
2036
logger.critical("AvahiError: %s", error)
3480
except AvahiError as error:
3481
logger.critical("Avahi Error", exc_info=error)
2037
3482
cleanup()
2038
3483
sys.exit(1)
2039
3484
except KeyboardInterrupt:
2044
3489
# Must run before the D-Bus bus name gets deregistered
2045
3490
cleanup()
2046
3491
3492
2047
3493
if __name__ == '__main__':
2048
3494
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0