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- Committer: Teddy Hogeborn
- Date: 2018-02-08 10:23:55 UTC
- mto: (237.7.594 trunk)
- mto: This revision was merged to the branch mainline in revision 362.
- 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
#
30
# along with Mandos. If not, see <http://www.gnu.org/licenses/>.
31
#
31
32
# Contact the authors at <mandos@recompile.se>.
32
#
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
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
65
74
import types
75
import binascii
76
import tempfile
77
import itertools
78
import collections
79
import codecs
66
80
67
81
import dbus
68
82
import dbus.service
69
import gobject
70
import avahi
83
from gi.repository import GLib
71
84
from dbus.mainloop.glib import DBusGMainLoop
72
85
import ctypes
73
86
import ctypes.util
74
87
import xml.dom.minidom
75
88
import inspect
76
89
90
# Try to find the value of SO_BINDTODEVICE:
77
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:
78
94
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
79
95
except AttributeError:
80
96
try:
97
# This is where SO_BINDTODEVICE was up to and including Python
98
# 2.6, and also 3.2:
81
99
from IN import SO_BINDTODEVICE
82
100
except ImportError:
83
SO_BINDTODEVICE = None
84
85
86
version = "1.4.1"
87
88
#logger = logging.getLogger('mandos')
89
logger = logging.Logger('mandos')
90
syslogger = (logging.handlers.SysLogHandler
91
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
92
address = str("/dev/log")))
93
syslogger.setFormatter(logging.Formatter
94
('Mandos [%(process)d]: %(levelname)s:'
95
' %(message)s'))
96
logger.addHandler(syslogger)
97
98
console = logging.StreamHandler()
99
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
100
' %(levelname)s:'
101
' %(message)s'))
102
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
103
303
104
304
class AvahiError(Exception):
105
305
def __init__(self, value, *args, **kwargs):
106
306
self.value = value
107
super(AvahiError, self).__init__(value, *args, **kwargs)
108
def __unicode__(self):
109
return unicode(repr(self.value))
307
return super(AvahiError, self).__init__(value, *args,
308
**kwargs)
309
110
310
111
311
class AvahiServiceError(AvahiError):
112
312
pass
113
313
314
114
315
class AvahiGroupError(AvahiError):
115
316
pass
116
317
117
318
118
319
class AvahiService(object):
119
320
"""An Avahi (Zeroconf) service.
120
321
121
322
Attributes:
122
323
interface: integer; avahi.IF_UNSPEC or an interface index.
123
324
Used to optionally bind to the specified interface.
124
325
name: string; Example: 'Mandos'
125
326
type: string; Example: '_mandos._tcp'.
126
See <http://www.dns-sd.org/ServiceTypes.html>
327
See <https://www.iana.org/assignments/service-names-port-numbers>
127
328
port: integer; what port to announce
128
329
TXT: list of strings; TXT record for the service
129
330
domain: string; Domain to publish on, default to .local if empty.
135
336
server: D-Bus Server
136
337
bus: dbus.SystemBus()
137
338
"""
138
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
139
servicetype = None, port = None, TXT = None,
140
domain = "", host = "", max_renames = 32768,
141
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):
142
351
self.interface = interface
143
352
self.name = name
144
353
self.type = servicetype
153
362
self.server = None
154
363
self.bus = bus
155
364
self.entry_group_state_changed_match = None
156
def rename(self):
365
366
def rename(self, remove=True):
157
367
"""Derived from the Avahi example code"""
158
368
if self.rename_count >= self.max_renames:
159
369
logger.critical("No suitable Zeroconf service name found"
160
370
" after %i retries, exiting.",
161
371
self.rename_count)
162
372
raise AvahiServiceError("Too many renames")
163
self.name = unicode(self.server
164
.GetAlternativeServiceName(self.name))
373
self.name = str(
374
self.server.GetAlternativeServiceName(self.name))
375
self.rename_count += 1
165
376
logger.info("Changing Zeroconf service name to %r ...",
166
377
self.name)
167
syslogger.setFormatter(logging.Formatter
168
('Mandos (%s) [%%(process)d]:'
169
' %%(levelname)s: %%(message)s'
170
% self.name))
171
self.remove()
378
if remove:
379
self.remove()
172
380
try:
173
381
self.add()
174
382
except dbus.exceptions.DBusException as error:
175
logger.critical("DBusException: %s", error)
176
self.cleanup()
177
os._exit(1)
178
self.rename_count += 1
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
179
392
def remove(self):
180
393
"""Derived from the Avahi example code"""
181
394
if self.entry_group_state_changed_match is not None:
183
396
self.entry_group_state_changed_match = None
184
397
if self.group is not None:
185
398
self.group.Reset()
399
186
400
def add(self):
187
401
"""Derived from the Avahi example code"""
188
402
self.remove()
193
407
avahi.DBUS_INTERFACE_ENTRY_GROUP)
194
408
self.entry_group_state_changed_match = (
195
409
self.group.connect_to_signal(
196
'StateChanged', self .entry_group_state_changed))
410
'StateChanged', self.entry_group_state_changed))
197
411
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
198
412
self.name, self.type)
199
413
self.group.AddService(
205
419
dbus.UInt16(self.port),
206
420
avahi.string_array_to_txt_array(self.TXT))
207
421
self.group.Commit()
422
208
423
def entry_group_state_changed(self, state, error):
209
424
"""Derived from the Avahi example code"""
210
425
logger.debug("Avahi entry group state change: %i", state)
211
426
212
427
if state == avahi.ENTRY_GROUP_ESTABLISHED:
213
428
logger.debug("Zeroconf service established.")
214
429
elif state == avahi.ENTRY_GROUP_COLLISION:
216
431
self.rename()
217
432
elif state == avahi.ENTRY_GROUP_FAILURE:
218
433
logger.critical("Avahi: Error in group state changed %s",
219
unicode(error))
220
raise AvahiGroupError("State changed: %s"
221
% unicode(error))
434
str(error))
435
raise AvahiGroupError("State changed: {!s}".format(error))
436
222
437
def cleanup(self):
223
438
"""Derived from the Avahi example code"""
224
439
if self.group is not None:
225
440
try:
226
441
self.group.Free()
227
442
except (dbus.exceptions.UnknownMethodException,
228
dbus.exceptions.DBusException) as e:
443
dbus.exceptions.DBusException):
229
444
pass
230
445
self.group = None
231
446
self.remove()
447
232
448
def server_state_changed(self, state, error=None):
233
449
"""Derived from the Avahi example code"""
234
450
logger.debug("Avahi server state change: %i", state)
235
bad_states = { avahi.SERVER_INVALID:
236
"Zeroconf server invalid",
237
avahi.SERVER_REGISTERING: None,
238
avahi.SERVER_COLLISION:
239
"Zeroconf server name collision",
240
avahi.SERVER_FAILURE:
241
"Zeroconf server failure" }
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
}
242
457
if state in bad_states:
243
458
if bad_states[state] is not None:
244
459
if error is None:
247
462
logger.error(bad_states[state] + ": %r", error)
248
463
self.cleanup()
249
464
elif state == avahi.SERVER_RUNNING:
250
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)
251
477
else:
252
478
if error is None:
253
479
logger.debug("Unknown state: %r", state)
254
480
else:
255
481
logger.debug("Unknown state: %r: %r", state, error)
482
256
483
def activate(self):
257
484
"""Derived from the Avahi example code"""
258
485
if self.server is None:
262
489
follow_name_owner_changes=True),
263
490
avahi.DBUS_INTERFACE_SERVER)
264
491
self.server.connect_to_signal("StateChanged",
265
self.server_state_changed)
492
self.server_state_changed)
266
493
self.server_state_changed(self.server.GetState())
267
494
268
495
269
def _timedelta_to_milliseconds(td):
270
"Convert a datetime.timedelta() to milliseconds"
271
return ((td.days * 24 * 60 * 60 * 1000)
272
+ (td.seconds * 1000)
273
+ (td.microseconds // 1000))
274
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
275
781
class Client(object):
276
782
"""A representation of a client host served by this server.
277
783
278
784
Attributes:
279
_approved: bool(); 'None' if not yet approved/disapproved
785
approved: bool(); 'None' if not yet approved/disapproved
280
786
approval_delay: datetime.timedelta(); Time to wait for approval
281
787
approval_duration: datetime.timedelta(); Duration of one approval
282
788
checker: subprocess.Popen(); a running checker process used
283
789
to see if the client lives.
284
790
'None' if no process is running.
285
checker_callback_tag: a gobject event source tag, or None
791
checker_callback_tag: a GLib event source tag, or None
286
792
checker_command: string; External command which is run to check
287
793
if client lives. %() expansions are done at
288
794
runtime with vars(self) as dict, so that for
289
795
instance %(name)s can be used in the command.
290
checker_initiator_tag: a gobject event source tag, or None
796
checker_initiator_tag: a GLib event source tag, or None
291
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
292
800
current_checker_command: string; current running checker_command
293
disable_hook: If set, called by disable() as disable_hook(self)
294
disable_initiator_tag: a gobject event source tag, or None
801
disable_initiator_tag: a GLib event source tag, or None
295
802
enabled: bool()
296
803
fingerprint: string (40 or 32 hexadecimal digits); used to
297
804
uniquely identify the client
299
806
interval: datetime.timedelta(); How often to start a new checker
300
807
last_approval_request: datetime.datetime(); (UTC) or None
301
808
last_checked_ok: datetime.datetime(); (UTC) or None
302
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
303
815
name: string; from the config file, used in log messages and
304
816
D-Bus identifiers
305
817
secret: bytestring; sent verbatim (over TLS) to client
306
818
timeout: datetime.timedelta(); How long from last_checked_ok
307
819
until this client is disabled
308
extended_timeout: extra long timeout when password has been sent
820
extended_timeout: extra long timeout when secret has been sent
309
821
runtime_expansions: Allowed attributes for runtime expansion.
310
822
expires: datetime.datetime(); time (UTC) when a client will be
311
823
disabled, or None
824
server_settings: The server_settings dict from main()
312
825
"""
313
826
314
827
runtime_expansions = ("approval_delay", "approval_duration",
315
"created", "enabled", "fingerprint",
316
"host", "interval", "last_checked_ok",
828
"created", "enabled", "expires",
829
"fingerprint", "host", "interval",
830
"last_approval_request", "last_checked_ok",
317
831
"last_enabled", "name", "timeout")
318
319
def timeout_milliseconds(self):
320
"Return the 'timeout' attribute in milliseconds"
321
return _timedelta_to_milliseconds(self.timeout)
322
323
def extended_timeout_milliseconds(self):
324
"Return the 'extended_timeout' attribute in milliseconds"
325
return _timedelta_to_milliseconds(self.extended_timeout)
326
327
def interval_milliseconds(self):
328
"Return the 'interval' attribute in milliseconds"
329
return _timedelta_to_milliseconds(self.interval)
330
331
def approval_delay_milliseconds(self):
332
return _timedelta_to_milliseconds(self.approval_delay)
333
334
def __init__(self, name = None, disable_hook=None, config=None):
335
"""Note: the 'checker' key in 'config' sets the
336
'checker_command' attribute and *not* the 'checker'
337
attribute."""
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
844
@staticmethod
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):
338
897
self.name = name
339
if config is None:
340
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
341
915
logger.debug("Creating client %r", self.name)
342
# Uppercase and remove spaces from fingerprint for later
343
# comparison purposes with return value from the fingerprint()
344
# function
345
self.fingerprint = (config["fingerprint"].upper()
346
.replace(" ", ""))
347
916
logger.debug(" Fingerprint: %s", self.fingerprint)
348
if "secret" in config:
349
self.secret = config["secret"].decode("base64")
350
elif "secfile" in config:
351
with open(os.path.expanduser(os.path.expandvars
352
(config["secfile"])),
353
"rb") as secfile:
354
self.secret = secfile.read()
355
else:
356
raise TypeError("No secret or secfile for client %s"
357
% self.name)
358
self.host = config.get("host", "")
359
self.created = datetime.datetime.utcnow()
360
self.enabled = False
361
self.last_approval_request = None
362
self.last_enabled = None
363
self.last_checked_ok = None
364
self.timeout = string_to_delta(config["timeout"])
365
self.extended_timeout = string_to_delta(config
366
["extended_timeout"])
367
self.interval = string_to_delta(config["interval"])
368
self.disable_hook = disable_hook
917
self.created = settings.get("created",
918
datetime.datetime.utcnow())
919
920
# attributes specific for this server instance
369
921
self.checker = None
370
922
self.checker_initiator_tag = None
371
923
self.disable_initiator_tag = None
372
self.expires = None
373
924
self.checker_callback_tag = None
374
self.checker_command = config["checker"]
375
925
self.current_checker_command = None
376
self.last_connect = None
377
self._approved = None
378
self.approved_by_default = config.get("approved_by_default",
379
True)
926
self.approved = None
380
927
self.approvals_pending = 0
381
self.approval_delay = string_to_delta(
382
config["approval_delay"])
383
self.approval_duration = string_to_delta(
384
config["approval_duration"])
385
self.changedstate = (multiprocessing_manager
386
.Condition(multiprocessing_manager
387
.Lock()))
388
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
389
941
def send_changedstate(self):
390
self.changedstate.acquire()
391
self.changedstate.notify_all()
392
self.changedstate.release()
393
942
with self.changedstate:
943
self.changedstate.notify_all()
944
394
945
def enable(self):
395
946
"""Start this client's checker and timeout hooks"""
396
947
if getattr(self, "enabled", False):
397
948
# Already enabled
398
949
return
399
self.send_changedstate()
400
# Schedule a new checker to be started an 'interval' from now,
401
# and every interval from then on.
402
self.checker_initiator_tag = (gobject.timeout_add
403
(self.interval_milliseconds(),
404
self.start_checker))
405
# Schedule a disable() when 'timeout' has passed
406
950
self.expires = datetime.datetime.utcnow() + self.timeout
407
self.disable_initiator_tag = (gobject.timeout_add
408
(self.timeout_milliseconds(),
409
self.disable))
410
951
self.enabled = True
411
952
self.last_enabled = datetime.datetime.utcnow()
412
# Also start a new checker *right now*.
413
self.start_checker()
414
953
self.init_checker()
954
self.send_changedstate()
955
415
956
def disable(self, quiet=True):
416
957
"""Disable this client."""
417
958
if not getattr(self, "enabled", False):
418
959
return False
419
960
if not quiet:
420
self.send_changedstate()
421
if not quiet:
422
961
logger.info("Disabling client %s", self.name)
423
if getattr(self, "disable_initiator_tag", False):
424
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)
425
964
self.disable_initiator_tag = None
426
965
self.expires = None
427
if getattr(self, "checker_initiator_tag", False):
428
gobject.source_remove(self.checker_initiator_tag)
966
if getattr(self, "checker_initiator_tag", None) is not None:
967
GLib.source_remove(self.checker_initiator_tag)
429
968
self.checker_initiator_tag = None
430
969
self.stop_checker()
431
if self.disable_hook:
432
self.disable_hook(self)
433
970
self.enabled = False
434
# 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
435
974
return False
436
975
437
976
def __del__(self):
438
self.disable_hook = None
439
977
self.disable()
440
441
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):
442
997
"""The checker has completed, so take appropriate actions."""
443
998
self.checker_callback_tag = None
444
999
self.checker = None
445
if os.WIFEXITED(condition):
446
exitstatus = os.WEXITSTATUS(condition)
447
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:
448
1008
logger.info("Checker for %(name)s succeeded",
449
1009
vars(self))
450
1010
self.checked_ok()
451
1011
else:
452
logger.info("Checker for %(name)s failed",
453
vars(self))
1012
logger.info("Checker for %(name)s failed", vars(self))
454
1013
else:
1014
self.last_checker_status = -1
1015
self.last_checker_signal = -returncode
455
1016
logger.warning("Checker for %(name)s crashed?",
456
1017
vars(self))
457
458
def checked_ok(self, timeout=None):
459
"""Bump up the timeout for this client.
460
461
This should only be called when the client has been seen,
462
alive and well.
463
"""
1018
return False
1019
1020
def checked_ok(self):
1021
"""Assert that the client has been seen, alive and well."""
1022
self.last_checked_ok = datetime.datetime.utcnow()
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."""
464
1029
if timeout is None:
465
1030
timeout = self.timeout
466
self.last_checked_ok = datetime.datetime.utcnow()
467
1031
if self.disable_initiator_tag is not None:
468
gobject.source_remove(self.disable_initiator_tag)
1032
GLib.source_remove(self.disable_initiator_tag)
1033
self.disable_initiator_tag = None
469
1034
if getattr(self, "enabled", False):
470
self.disable_initiator_tag = (gobject.timeout_add
471
(_timedelta_to_milliseconds
472
(timeout), self.disable))
1035
self.disable_initiator_tag = GLib.timeout_add(
1036
int(timeout.total_seconds() * 1000), self.disable)
473
1037
self.expires = datetime.datetime.utcnow() + timeout
474
1038
475
1039
def need_approval(self):
476
1040
self.last_approval_request = datetime.datetime.utcnow()
477
1041
478
1042
def start_checker(self):
479
1043
"""Start a new checker subprocess if one is not running.
480
1044
481
1045
If a checker already exists, leave it running and do
482
1046
nothing."""
483
1047
# The reason for not killing a running checker is that if we
484
# did that, then if a checker (for some reason) started
485
# running slowly and taking more than 'interval' time, the
486
# client would inevitably timeout, since no checker would get
487
# 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
488
1052
# checkers alone, the checker would have to take more time
489
1053
# than 'timeout' for the client to be disabled, which is as it
490
1054
# should be.
491
492
# If a checker exists, make sure it is not a zombie
493
try:
494
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
495
except (AttributeError, OSError) as error:
496
if (isinstance(error, OSError)
497
and error.errno != errno.ECHILD):
498
raise error
499
else:
500
if pid:
501
logger.warning("Checker was a zombie")
502
gobject.source_remove(self.checker_callback_tag)
503
self.checker_callback(pid, status,
504
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
505
1060
# Start a new checker if needed
506
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}
507
1066
try:
508
# In case checker_command has exactly one % operator
509
command = self.checker_command % self.host
510
except TypeError:
511
# Escape attributes for the shell
512
escaped_attrs = dict(
513
(attr,
514
re.escape(unicode(str(getattr(self, attr, "")),
515
errors=
516
'replace')))
517
for attr in
518
self.runtime_expansions)
519
520
try:
521
command = self.checker_command % escaped_attrs
522
except TypeError as error:
523
logger.error('Could not format string "%s":'
524
' %s', self.checker_command, error)
525
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
526
1073
self.current_checker_command = command
527
try:
528
logger.info("Starting checker %r for %s",
529
command, self.name)
530
# We don't need to redirect stdout and stderr, since
531
# in normal mode, that is already done by daemon(),
532
# and in debug mode we don't want to. (Stdin is
533
# always replaced by /dev/null.)
534
self.checker = subprocess.Popen(command,
535
close_fds=True,
536
shell=True, cwd="/")
537
self.checker_callback_tag = (gobject.child_watch_add
538
(self.checker.pid,
539
self.checker_callback,
540
data=command))
541
# The checker may have completed before the gobject
542
# watch was added. Check for this.
543
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
544
if pid:
545
gobject.source_remove(self.checker_callback_tag)
546
self.checker_callback(pid, status, command)
547
except OSError as error:
548
logger.error("Failed to start subprocess: %s",
549
error)
550
# 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
551
1100
return True
552
1101
553
1102
def stop_checker(self):
554
1103
"""Force the checker process, if any, to stop."""
555
1104
if self.checker_callback_tag:
556
gobject.source_remove(self.checker_callback_tag)
1105
GLib.source_remove(self.checker_callback_tag)
557
1106
self.checker_callback_tag = None
558
1107
if getattr(self, "checker", None) is None:
559
1108
return
560
1109
logger.debug("Stopping checker for %(name)s", vars(self))
561
try:
562
os.kill(self.checker.pid, signal.SIGTERM)
563
#time.sleep(0.5)
564
#if self.checker.poll() is None:
565
# os.kill(self.checker.pid, signal.SIGKILL)
566
except OSError as error:
567
if error.errno != errno.ESRCH: # No such process
568
raise
1110
self.checker.terminate()
569
1111
self.checker = None
570
1112
571
1113
572
def dbus_service_property(dbus_interface, signature="v",
573
access="readwrite", byte_arrays=False):
1114
def dbus_service_property(dbus_interface,
1115
signature="v",
1116
access="readwrite",
1117
byte_arrays=False):
574
1118
"""Decorators for marking methods of a DBusObjectWithProperties to
575
1119
become properties on the D-Bus.
576
1120
577
1121
The decorated method will be called with no arguments by "Get"
578
1122
and with one argument by "Set".
579
1123
580
1124
The parameters, where they are supported, are the same as
581
1125
dbus.service.method, except there is only "signature", since the
582
1126
type from Get() and the type sent to Set() is the same.
585
1129
# "Set" method, so we fail early here:
586
1130
if byte_arrays and signature != "ay":
587
1131
raise ValueError("Byte arrays not supported for non-'ay'"
588
" signature %r" % signature)
1132
" signature {!r}".format(signature))
1133
589
1134
def decorator(func):
590
1135
func._dbus_is_property = True
591
1136
func._dbus_interface = dbus_interface
594
1139
func._dbus_name = func.__name__
595
1140
if func._dbus_name.endswith("_dbus_property"):
596
1141
func._dbus_name = func._dbus_name[:-14]
597
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
598
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
599
1188
return decorator
600
1189
601
1190
602
1191
class DBusPropertyException(dbus.exceptions.DBusException):
603
1192
"""A base class for D-Bus property-related exceptions
604
1193
"""
605
def __unicode__(self):
606
return unicode(str(self))
1194
pass
607
1195
608
1196
609
1197
class DBusPropertyAccessException(DBusPropertyException):
618
1206
pass
619
1207
620
1208
621
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):
622
1299
"""A D-Bus object with properties.
623
1300
624
1301
Classes inheriting from this can use the dbus_service_property
625
1302
decorator to expose methods as D-Bus properties. It exposes the
626
1303
standard Get(), Set(), and GetAll() methods on the D-Bus.
627
1304
"""
628
629
@staticmethod
630
def _is_dbus_property(obj):
631
return getattr(obj, "_dbus_is_property", False)
632
633
def _get_all_dbus_properties(self):
634
"""Returns a generator of (name, attribute) pairs
635
"""
636
return ((prop.__get__(self)._dbus_name, prop.__get__(self))
637
for cls in self.__class__.__mro__
638
for name, prop in
639
inspect.getmembers(cls, self._is_dbus_property))
640
1305
641
1306
def _get_dbus_property(self, interface_name, property_name):
642
1307
"""Returns a bound method if one exists which is a D-Bus
643
1308
property with the specified name and interface.
644
1309
"""
645
for cls in self.__class__.__mro__:
646
for name, value in (inspect.getmembers
647
(cls, self._is_dbus_property)):
1310
for cls in self.__class__.__mro__:
1311
for name, value in inspect.getmembers(
1312
cls, self._is_dbus_thing("property")):
648
1313
if (value._dbus_name == property_name
649
1314
and value._dbus_interface == interface_name):
650
1315
return value.__get__(self)
651
1316
652
1317
# No such property
653
raise DBusPropertyNotFound(self.dbus_object_path + ":"
654
+ interface_name + "."
655
+ property_name)
656
657
@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",
658
1332
out_signature="v")
659
1333
def Get(self, interface_name, property_name):
660
1334
"""Standard D-Bus property Get() method, see D-Bus standard.
666
1340
if not hasattr(value, "variant_level"):
667
1341
return value
668
1342
return type(value)(value, variant_level=value.variant_level+1)
669
1343
670
1344
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
671
1345
def Set(self, interface_name, property_name, value):
672
1346
"""Standard D-Bus property Set() method, see D-Bus standard.
678
1352
# The byte_arrays option is not supported yet on
679
1353
# signatures other than "ay".
680
1354
if prop._dbus_signature != "ay":
681
raise ValueError
682
value = dbus.ByteArray(''.join(unichr(byte)
683
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))
684
1360
prop(value)
685
686
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
1361
1362
@dbus.service.method(dbus.PROPERTIES_IFACE,
1363
in_signature="s",
687
1364
out_signature="a{sv}")
688
1365
def GetAll(self, interface_name):
689
1366
"""Standard D-Bus property GetAll() method, see D-Bus
690
1367
standard.
691
1368
692
1369
Note: Will not include properties with access="write".
693
1370
"""
694
all = {}
695
for name, prop in self._get_all_dbus_properties():
1371
properties = {}
1372
for name, prop in self._get_all_dbus_things("property"):
696
1373
if (interface_name
697
1374
and interface_name != prop._dbus_interface):
698
1375
# Interface non-empty but did not match
702
1379
continue
703
1380
value = prop()
704
1381
if not hasattr(value, "variant_level"):
705
all[name] = value
1382
properties[name] = value
706
1383
continue
707
all[name] = type(value)(value, variant_level=
708
value.variant_level+1)
709
return dbus.Dictionary(all, signature="sv")
710
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
711
1396
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
712
1397
out_signature="s",
713
1398
path_keyword='object_path',
714
1399
connection_keyword='connection')
715
1400
def Introspect(self, object_path, connection):
716
"""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.
717
1404
"""
718
xmlstring = dbus.service.Object.Introspect(self, object_path,
719
connection)
1405
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1406
object_path,
1407
connection)
720
1408
try:
721
1409
document = xml.dom.minidom.parseString(xmlstring)
1410
722
1411
def make_tag(document, name, prop):
723
1412
e = document.createElement("property")
724
1413
e.setAttribute("name", name)
725
1414
e.setAttribute("type", prop._dbus_signature)
726
1415
e.setAttribute("access", prop._dbus_access)
727
1416
return e
1417
728
1418
for if_tag in document.getElementsByTagName("interface"):
1419
# Add property tags
729
1420
for tag in (make_tag(document, name, prop)
730
1421
for name, prop
731
in self._get_all_dbus_properties()
1422
in self._get_all_dbus_things("property")
732
1423
if prop._dbus_interface
733
1424
== if_tag.getAttribute("name")):
734
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)
735
1442
# Add the names to the return values for the
736
1443
# "org.freedesktop.DBus.Properties" methods
737
1444
if (if_tag.getAttribute("name")
752
1459
except (AttributeError, xml.dom.DOMException,
753
1460
xml.parsers.expat.ExpatError) as error:
754
1461
logger.error("Failed to override Introspection method",
755
error)
756
return xmlstring
757
758
759
def datetime_to_dbus (dt, variant_level=0):
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):
760
1538
"""Convert a UTC datetime.datetime() to a D-Bus type."""
761
1539
if dt is None:
762
return dbus.String("", variant_level = variant_level)
763
return dbus.String(dt.isoformat(),
764
variant_level=variant_level)
765
766
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
767
.__metaclass__):
768
"""Applied to an empty subclass of a D-Bus object, this metaclass
769
will add additional D-Bus attributes matching a certain pattern.
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).
770
1566
"""
771
def __new__(mcs, name, bases, attr):
772
# Go through all the base classes which could have D-Bus
773
# methods, signals, or properties in them
774
for base in (b for b in bases
775
if issubclass(b, dbus.service.Object)):
776
# Go though all attributes of the base class
777
for attrname, attribute in inspect.getmembers(base):
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):
778
1575
# Ignore non-D-Bus attributes, and D-Bus attributes
779
1576
# with the wrong interface name
780
1577
if (not hasattr(attribute, "_dbus_interface")
781
or not attribute._dbus_interface
782
.startswith("se.recompile.Mandos")):
1578
or not attribute._dbus_interface.startswith(
1579
orig_interface_name)):
783
1580
continue
784
1581
# Create an alternate D-Bus interface name based on
785
1582
# the current name
786
alt_interface = (attribute._dbus_interface
787
.replace("se.recompile.Mandos",
788
"se.bsnet.fukt.Mandos"))
1583
alt_interface = attribute._dbus_interface.replace(
1584
orig_interface_name, alt_interface_name)
1585
interface_names.add(alt_interface)
789
1586
# Is this a D-Bus signal?
790
1587
if getattr(attribute, "_dbus_is_signal", False):
791
# Extract the original non-method function by
792
# black magic
793
nonmethod_func = (dict(
1588
# Extract the original non-method undecorated
1589
# function by black magic
1590
if sys.version_info.major == 2:
1591
nonmethod_func = (dict(
794
1592
zip(attribute.func_code.co_freevars,
795
attribute.__closure__))["func"]
796
.cell_contents)
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)
797
1600
# Create a new, but exactly alike, function
798
1601
# object, and decorate it to be a new D-Bus signal
799
1602
# with the alternate D-Bus interface name
800
new_function = (dbus.service.signal
801
(alt_interface,
802
attribute._dbus_signature)
803
(types.FunctionType(
804
nonmethod_func.func_code,
805
nonmethod_func.func_globals,
806
nonmethod_func.func_name,
807
nonmethod_func.func_defaults,
808
nonmethod_func.func_closure)))
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
809
1614
# Define a creator of a function to call both the
810
# old and new functions, so both the old and new
811
# signals gets sent when the function is called
1615
# original and alternate functions, so both the
1616
# original and alternate signals gets sent when
1617
# the function is called
812
1618
def fixscope(func1, func2):
813
1619
"""This function is a scope container to pass
814
1620
func1 and func2 to the "call_both" function
815
1621
outside of its arguments"""
1622
1623
@functools.wraps(func2)
816
1624
def call_both(*args, **kwargs):
817
1625
"""This function will emit two D-Bus
818
1626
signals by calling func1 and func2"""
819
1627
func1(*args, **kwargs)
820
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
821
1635
return call_both
822
1636
# Create the "call_both" function and add it to
823
1637
# the class
824
attr[attrname] = fixscope(attribute,
825
new_function)
1638
attr[attrname] = fixscope(attribute, new_function)
826
1639
# Is this a D-Bus method?
827
1640
elif getattr(attribute, "_dbus_is_method", False):
828
1641
# Create a new, but exactly alike, function
829
1642
# object. Decorate it to be a new D-Bus method
830
1643
# with the alternate D-Bus interface name. Add it
831
1644
# to the class.
832
attr[attrname] = (dbus.service.method
833
(alt_interface,
834
attribute._dbus_in_signature,
835
attribute._dbus_out_signature)
836
(types.FunctionType
837
(attribute.func_code,
838
attribute.func_globals,
839
attribute.func_name,
840
attribute.func_defaults,
841
attribute.func_closure)))
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
842
1657
# Is this a D-Bus property?
843
1658
elif getattr(attribute, "_dbus_is_property", False):
844
1659
# Create a new, but exactly alike, function
845
1660
# object, and decorate it to be a new D-Bus
846
1661
# property with the alternate D-Bus interface
847
1662
# name. Add it to the class.
848
attr[attrname] = (dbus_service_property
849
(alt_interface,
850
attribute._dbus_signature,
851
attribute._dbus_access,
852
attribute
853
._dbus_get_args_options
854
["byte_arrays"])
855
(types.FunctionType
856
(attribute.func_code,
857
attribute.func_globals,
858
attribute.func_name,
859
attribute.func_defaults,
860
attribute.func_closure)))
861
return type.__new__(mcs, name, bases, attr)
862
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"})
863
1715
class ClientDBus(Client, DBusObjectWithProperties):
864
1716
"""A Client class using D-Bus
865
1717
866
1718
Attributes:
867
1719
dbus_object_path: dbus.ObjectPath
868
1720
bus: dbus.SystemBus()
869
1721
"""
870
1722
871
1723
runtime_expansions = (Client.runtime_expansions
872
+ ("dbus_object_path",))
873
1724
+ ("dbus_object_path", ))
1725
1726
_interface = "se.recompile.Mandos.Client"
1727
874
1728
# dbus.service.Object doesn't use super(), so we can't either.
875
876
def __init__(self, bus = None, *args, **kwargs):
877
self._approvals_pending = 0
1729
1730
def __init__(self, bus=None, *args, **kwargs):
878
1731
self.bus = bus
879
1732
Client.__init__(self, *args, **kwargs)
880
1733
# Only now, when this client is initialized, can it show up on
881
1734
# the D-Bus
882
client_object_name = unicode(self.name).translate(
1735
client_object_name = str(self.name).translate(
883
1736
{ord("."): ord("_"),
884
1737
ord("-"): ord("_")})
885
self.dbus_object_path = (dbus.ObjectPath
886
("/clients/" + client_object_name))
1738
self.dbus_object_path = dbus.ObjectPath(
1739
"/clients/" + client_object_name)
887
1740
DBusObjectWithProperties.__init__(self, self.bus,
888
1741
self.dbus_object_path)
889
890
def notifychangeproperty(transform_func,
891
dbus_name, type_func=lambda x: x,
892
variant_level=1):
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):
893
1748
""" Modify a variable so that it's a property which announces
894
1749
its changes to DBus.
895
1750
900
1755
to the D-Bus. Default: no transform
901
1756
variant_level: D-Bus variant level. Default: 1
902
1757
"""
903
attrname = "_{0}".format(dbus_name)
1758
attrname = "_{}".format(dbus_name)
1759
904
1760
def setter(self, value):
905
1761
if hasattr(self, "dbus_object_path"):
906
1762
if (not hasattr(self, attrname) or
907
1763
type_func(getattr(self, attrname, None))
908
1764
!= type_func(value)):
909
dbus_value = transform_func(type_func(value),
910
variant_level
911
=variant_level)
912
self.PropertyChanged(dbus.String(dbus_name),
913
dbus_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())
914
1780
setattr(self, attrname, value)
915
1781
916
1782
return property(lambda self: getattr(self, attrname), setter)
917
918
1783
919
1784
expires = notifychangeproperty(datetime_to_dbus, "Expires")
920
1785
approvals_pending = notifychangeproperty(dbus.Boolean,
921
1786
"ApprovalPending",
922
type_func = bool)
1787
type_func=bool)
923
1788
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
924
1789
last_enabled = notifychangeproperty(datetime_to_dbus,
925
1790
"LastEnabled")
926
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
927
type_func = lambda checker:
928
checker is not None)
1791
checker = notifychangeproperty(
1792
dbus.Boolean, "CheckerRunning",
1793
type_func=lambda checker: checker is not None)
929
1794
last_checked_ok = notifychangeproperty(datetime_to_dbus,
930
1795
"LastCheckedOK")
1796
last_checker_status = notifychangeproperty(dbus.Int16,
1797
"LastCheckerStatus")
931
1798
last_approval_request = notifychangeproperty(
932
1799
datetime_to_dbus, "LastApprovalRequest")
933
1800
approved_by_default = notifychangeproperty(dbus.Boolean,
934
1801
"ApprovedByDefault")
935
approval_delay = notifychangeproperty(dbus.UInt16,
936
"ApprovalDelay",
937
type_func =
938
_timedelta_to_milliseconds)
1802
approval_delay = notifychangeproperty(
1803
dbus.UInt64, "ApprovalDelay",
1804
type_func=lambda td: td.total_seconds() * 1000)
939
1805
approval_duration = notifychangeproperty(
940
dbus.UInt16, "ApprovalDuration",
941
type_func = _timedelta_to_milliseconds)
1806
dbus.UInt64, "ApprovalDuration",
1807
type_func=lambda td: td.total_seconds() * 1000)
942
1808
host = notifychangeproperty(dbus.String, "Host")
943
timeout = notifychangeproperty(dbus.UInt16, "Timeout",
944
type_func =
945
_timedelta_to_milliseconds)
1809
timeout = notifychangeproperty(
1810
dbus.UInt64, "Timeout",
1811
type_func=lambda td: td.total_seconds() * 1000)
946
1812
extended_timeout = notifychangeproperty(
947
dbus.UInt16, "ExtendedTimeout",
948
type_func = _timedelta_to_milliseconds)
949
interval = notifychangeproperty(dbus.UInt16,
950
"Interval",
951
type_func =
952
_timedelta_to_milliseconds)
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)
953
1818
checker_command = notifychangeproperty(dbus.String, "Checker")
954
1819
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1820
invalidate_only=True)
1821
955
1822
del notifychangeproperty
956
1823
957
1824
def __del__(self, *args, **kwargs):
958
1825
try:
959
1826
self.remove_from_connection()
962
1829
if hasattr(DBusObjectWithProperties, "__del__"):
963
1830
DBusObjectWithProperties.__del__(self, *args, **kwargs)
964
1831
Client.__del__(self, *args, **kwargs)
965
966
def checker_callback(self, pid, condition, command,
967
*args, **kwargs):
968
self.checker_callback_tag = None
969
self.checker = None
970
if os.WIFEXITED(condition):
971
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:
972
1840
# Emit D-Bus signal
973
1841
self.CheckerCompleted(dbus.Int16(exitstatus),
974
dbus.Int64(condition),
1842
# This is specific to GNU libC
1843
dbus.Int64(exitstatus << 8),
975
1844
dbus.String(command))
976
1845
else:
977
1846
# Emit D-Bus signal
978
1847
self.CheckerCompleted(dbus.Int16(-1),
979
dbus.Int64(condition),
1848
dbus.Int64(
1849
# This is specific to GNU libC
1850
(exitstatus << 8)
1851
| self.last_checker_signal),
980
1852
dbus.String(command))
981
982
return Client.checker_callback(self, pid, condition, command,
983
*args, **kwargs)
984
1853
return ret
1854
985
1855
def start_checker(self, *args, **kwargs):
986
old_checker = self.checker
987
if self.checker is not None:
988
old_checker_pid = self.checker.pid
989
else:
990
old_checker_pid = None
1856
old_checker_pid = getattr(self.checker, "pid", None)
991
1857
r = Client.start_checker(self, *args, **kwargs)
992
1858
# Only if new checker process was started
993
1859
if (self.checker is not None
995
1861
# Emit D-Bus signal
996
1862
self.CheckerStarted(self.current_checker_command)
997
1863
return r
998
1864
999
1865
def _reset_approved(self):
1000
self._approved = None
1866
self.approved = None
1001
1867
return False
1002
1868
1003
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)
1004
1873
self.send_changedstate()
1005
self._approved = value
1006
gobject.timeout_add(_timedelta_to_milliseconds
1007
(self.approval_duration),
1008
self._reset_approved)
1009
1010
1011
## D-Bus methods, signals & properties
1012
_interface = "se.recompile.Mandos.Client"
1013
1014
## Signals
1015
1874
1875
# D-Bus methods, signals & properties
1876
1877
# Interfaces
1878
1879
# Signals
1880
1016
1881
# CheckerCompleted - signal
1017
1882
@dbus.service.signal(_interface, signature="nxs")
1018
1883
def CheckerCompleted(self, exitcode, waitstatus, command):
1019
1884
"D-Bus signal"
1020
1885
pass
1021
1886
1022
1887
# CheckerStarted - signal
1023
1888
@dbus.service.signal(_interface, signature="s")
1024
1889
def CheckerStarted(self, command):
1025
1890
"D-Bus signal"
1026
1891
pass
1027
1892
1028
1893
# PropertyChanged - signal
1894
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1029
1895
@dbus.service.signal(_interface, signature="sv")
1030
1896
def PropertyChanged(self, property, value):
1031
1897
"D-Bus signal"
1032
1898
pass
1033
1899
1034
1900
# GotSecret - signal
1035
1901
@dbus.service.signal(_interface)
1036
1902
def GotSecret(self):
1039
1905
server to mandos-client
1040
1906
"""
1041
1907
pass
1042
1908
1043
1909
# Rejected - signal
1044
1910
@dbus.service.signal(_interface, signature="s")
1045
1911
def Rejected(self, reason):
1046
1912
"D-Bus signal"
1047
1913
pass
1048
1914
1049
1915
# NeedApproval - signal
1050
1916
@dbus.service.signal(_interface, signature="tb")
1051
1917
def NeedApproval(self, timeout, default):
1052
1918
"D-Bus signal"
1053
1919
return self.need_approval()
1054
1055
## Methods
1056
1920
1921
# Methods
1922
1057
1923
# Approve - method
1058
1924
@dbus.service.method(_interface, in_signature="b")
1059
1925
def Approve(self, value):
1060
1926
self.approve(value)
1061
1927
1062
1928
# CheckedOK - method
1063
1929
@dbus.service.method(_interface)
1064
1930
def CheckedOK(self):
1065
1931
self.checked_ok()
1066
1932
1067
1933
# Enable - method
1934
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1068
1935
@dbus.service.method(_interface)
1069
1936
def Enable(self):
1070
1937
"D-Bus method"
1071
1938
self.enable()
1072
1939
1073
1940
# StartChecker - method
1941
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1074
1942
@dbus.service.method(_interface)
1075
1943
def StartChecker(self):
1076
1944
"D-Bus method"
1077
1945
self.start_checker()
1078
1946
1079
1947
# Disable - method
1948
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1080
1949
@dbus.service.method(_interface)
1081
1950
def Disable(self):
1082
1951
"D-Bus method"
1083
1952
self.disable()
1084
1953
1085
1954
# StopChecker - method
1955
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1086
1956
@dbus.service.method(_interface)
1087
1957
def StopChecker(self):
1088
1958
self.stop_checker()
1089
1090
## Properties
1091
1959
1960
# Properties
1961
1092
1962
# ApprovalPending - property
1093
1963
@dbus_service_property(_interface, signature="b", access="read")
1094
1964
def ApprovalPending_dbus_property(self):
1095
1965
return dbus.Boolean(bool(self.approvals_pending))
1096
1966
1097
1967
# ApprovedByDefault - property
1098
@dbus_service_property(_interface, signature="b",
1968
@dbus_service_property(_interface,
1969
signature="b",
1099
1970
access="readwrite")
1100
1971
def ApprovedByDefault_dbus_property(self, value=None):
1101
1972
if value is None: # get
1102
1973
return dbus.Boolean(self.approved_by_default)
1103
1974
self.approved_by_default = bool(value)
1104
1975
1105
1976
# ApprovalDelay - property
1106
@dbus_service_property(_interface, signature="t",
1977
@dbus_service_property(_interface,
1978
signature="t",
1107
1979
access="readwrite")
1108
1980
def ApprovalDelay_dbus_property(self, value=None):
1109
1981
if value is None: # get
1110
return dbus.UInt64(self.approval_delay_milliseconds())
1982
return dbus.UInt64(self.approval_delay.total_seconds()
1983
* 1000)
1111
1984
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1112
1985
1113
1986
# ApprovalDuration - property
1114
@dbus_service_property(_interface, signature="t",
1987
@dbus_service_property(_interface,
1988
signature="t",
1115
1989
access="readwrite")
1116
1990
def ApprovalDuration_dbus_property(self, value=None):
1117
1991
if value is None: # get
1118
return dbus.UInt64(_timedelta_to_milliseconds(
1119
self.approval_duration))
1992
return dbus.UInt64(self.approval_duration.total_seconds()
1993
* 1000)
1120
1994
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1121
1995
1122
1996
# Name - property
1997
@dbus_annotations(
1998
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1123
1999
@dbus_service_property(_interface, signature="s", access="read")
1124
2000
def Name_dbus_property(self):
1125
2001
return dbus.String(self.name)
1126
2002
1127
2003
# Fingerprint - property
2004
@dbus_annotations(
2005
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1128
2006
@dbus_service_property(_interface, signature="s", access="read")
1129
2007
def Fingerprint_dbus_property(self):
1130
2008
return dbus.String(self.fingerprint)
1131
2009
1132
2010
# Host - property
1133
@dbus_service_property(_interface, signature="s",
2011
@dbus_service_property(_interface,
2012
signature="s",
1134
2013
access="readwrite")
1135
2014
def Host_dbus_property(self, value=None):
1136
2015
if value is None: # get
1137
2016
return dbus.String(self.host)
1138
self.host = value
1139
2017
self.host = str(value)
2018
1140
2019
# Created - property
2020
@dbus_annotations(
2021
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1141
2022
@dbus_service_property(_interface, signature="s", access="read")
1142
2023
def Created_dbus_property(self):
1143
return dbus.String(datetime_to_dbus(self.created))
1144
2024
return datetime_to_dbus(self.created)
2025
1145
2026
# LastEnabled - property
1146
2027
@dbus_service_property(_interface, signature="s", access="read")
1147
2028
def LastEnabled_dbus_property(self):
1148
2029
return datetime_to_dbus(self.last_enabled)
1149
2030
1150
2031
# Enabled - property
1151
@dbus_service_property(_interface, signature="b",
2032
@dbus_service_property(_interface,
2033
signature="b",
1152
2034
access="readwrite")
1153
2035
def Enabled_dbus_property(self, value=None):
1154
2036
if value is None: # get
1157
2039
self.enable()
1158
2040
else:
1159
2041
self.disable()
1160
2042
1161
2043
# LastCheckedOK - property
1162
@dbus_service_property(_interface, signature="s",
2044
@dbus_service_property(_interface,
2045
signature="s",
1163
2046
access="readwrite")
1164
2047
def LastCheckedOK_dbus_property(self, value=None):
1165
2048
if value is not None:
1166
2049
self.checked_ok()
1167
2050
return
1168
2051
return datetime_to_dbus(self.last_checked_ok)
1169
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
1170
2058
# Expires - property
1171
2059
@dbus_service_property(_interface, signature="s", access="read")
1172
2060
def Expires_dbus_property(self):
1173
2061
return datetime_to_dbus(self.expires)
1174
2062
1175
2063
# LastApprovalRequest - property
1176
2064
@dbus_service_property(_interface, signature="s", access="read")
1177
2065
def LastApprovalRequest_dbus_property(self):
1178
2066
return datetime_to_dbus(self.last_approval_request)
1179
2067
1180
2068
# Timeout - property
1181
@dbus_service_property(_interface, signature="t",
2069
@dbus_service_property(_interface,
2070
signature="t",
1182
2071
access="readwrite")
1183
2072
def Timeout_dbus_property(self, value=None):
1184
2073
if value is None: # get
1185
return dbus.UInt64(self.timeout_milliseconds())
2074
return dbus.UInt64(self.timeout.total_seconds() * 1000)
2075
old_timeout = self.timeout
1186
2076
self.timeout = datetime.timedelta(0, 0, 0, value)
1187
if getattr(self, "disable_initiator_tag", None) is None:
1188
return
1189
# Reschedule timeout
1190
gobject.source_remove(self.disable_initiator_tag)
1191
self.disable_initiator_tag = None
1192
self.expires = None
1193
time_to_die = _timedelta_to_milliseconds((self
1194
.last_checked_ok
1195
+ self.timeout)
1196
- datetime.datetime
1197
.utcnow())
1198
if time_to_die <= 0:
1199
# The timeout has passed
1200
self.disable()
1201
else:
1202
self.expires = (datetime.datetime.utcnow()
1203
+ datetime.timedelta(milliseconds =
1204
time_to_die))
1205
self.disable_initiator_tag = (gobject.timeout_add
1206
(time_to_die, self.disable))
1207
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
1208
2093
# ExtendedTimeout - property
1209
@dbus_service_property(_interface, signature="t",
2094
@dbus_service_property(_interface,
2095
signature="t",
1210
2096
access="readwrite")
1211
2097
def ExtendedTimeout_dbus_property(self, value=None):
1212
2098
if value is None: # get
1213
return dbus.UInt64(self.extended_timeout_milliseconds())
2099
return dbus.UInt64(self.extended_timeout.total_seconds()
2100
* 1000)
1214
2101
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1215
2102
1216
2103
# Interval - property
1217
@dbus_service_property(_interface, signature="t",
2104
@dbus_service_property(_interface,
2105
signature="t",
1218
2106
access="readwrite")
1219
2107
def Interval_dbus_property(self, value=None):
1220
2108
if value is None: # get
1221
return dbus.UInt64(self.interval_milliseconds())
2109
return dbus.UInt64(self.interval.total_seconds() * 1000)
1222
2110
self.interval = datetime.timedelta(0, 0, 0, value)
1223
2111
if getattr(self, "checker_initiator_tag", None) is None:
1224
2112
return
1225
# Reschedule checker run
1226
gobject.source_remove(self.checker_initiator_tag)
1227
self.checker_initiator_tag = (gobject.timeout_add
1228
(value, self.start_checker))
1229
self.start_checker() # Start one now, too
1230
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
2119
1231
2120
# Checker - property
1232
@dbus_service_property(_interface, signature="s",
2121
@dbus_service_property(_interface,
2122
signature="s",
1233
2123
access="readwrite")
1234
2124
def Checker_dbus_property(self, value=None):
1235
2125
if value is None: # get
1236
2126
return dbus.String(self.checker_command)
1237
self.checker_command = value
1238
2127
self.checker_command = str(value)
2128
1239
2129
# CheckerRunning - property
1240
@dbus_service_property(_interface, signature="b",
2130
@dbus_service_property(_interface,
2131
signature="b",
1241
2132
access="readwrite")
1242
2133
def CheckerRunning_dbus_property(self, value=None):
1243
2134
if value is None: # get
1246
2137
self.start_checker()
1247
2138
else:
1248
2139
self.stop_checker()
1249
2140
1250
2141
# ObjectPath - property
2142
@dbus_annotations(
2143
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
2144
"org.freedesktop.DBus.Deprecated": "true"})
1251
2145
@dbus_service_property(_interface, signature="o", access="read")
1252
2146
def ObjectPath_dbus_property(self):
1253
return self.dbus_object_path # is already a dbus.ObjectPath
1254
2147
return self.dbus_object_path # is already a dbus.ObjectPath
2148
1255
2149
# Secret = property
1256
@dbus_service_property(_interface, signature="ay",
1257
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)
1258
2157
def Secret_dbus_property(self, value):
1259
self.secret = str(value)
1260
2158
self.secret = bytes(value)
2159
1261
2160
del _interface
1262
2161
1263
2162
1266
2165
self._pipe = child_pipe
1267
2166
self._pipe.send(('init', fpr, address))
1268
2167
if not self._pipe.recv():
1269
raise KeyError()
1270
2168
raise KeyError(fpr)
2169
1271
2170
def __getattribute__(self, name):
1272
if(name == '_pipe'):
2171
if name == '_pipe':
1273
2172
return super(ProxyClient, self).__getattribute__(name)
1274
2173
self._pipe.send(('getattr', name))
1275
2174
data = self._pipe.recv()
1276
2175
if data[0] == 'data':
1277
2176
return data[1]
1278
2177
if data[0] == 'function':
2178
1279
2179
def func(*args, **kwargs):
1280
2180
self._pipe.send(('funcall', name, args, kwargs))
1281
2181
return self._pipe.recv()[1]
2182
1282
2183
return func
1283
2184
1284
2185
def __setattr__(self, name, value):
1285
if(name == '_pipe'):
2186
if name == '_pipe':
1286
2187
return super(ProxyClient, self).__setattr__(name, value)
1287
2188
self._pipe.send(('setattr', name, value))
1288
2189
1289
class ClientDBusTransitional(ClientDBus):
1290
__metaclass__ = AlternateDBusNamesMetaclass
1291
2190
1292
2191
class ClientHandler(socketserver.BaseRequestHandler, object):
1293
2192
"""A class to handle client connections.
1294
2193
1295
2194
Instantiated once for each connection to handle it.
1296
2195
Note: This will run in its own forked process."""
1297
2196
1298
2197
def handle(self):
1299
2198
with contextlib.closing(self.server.child_pipe) as child_pipe:
1300
2199
logger.info("TCP connection from: %s",
1301
unicode(self.client_address))
2200
str(self.client_address))
1302
2201
logger.debug("Pipe FD: %d",
1303
2202
self.server.child_pipe.fileno())
1304
1305
session = (gnutls.connection
1306
.ClientSession(self.request,
1307
gnutls.connection
1308
.X509Credentials()))
1309
1310
# Note: gnutls.connection.X509Credentials is really a
1311
# generic GnuTLS certificate credentials object so long as
1312
# no X.509 keys are added to it. Therefore, we can use it
1313
# here despite using OpenPGP certificates.
1314
1315
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1316
# "+AES-256-CBC", "+SHA1",
1317
# "+COMP-NULL", "+CTYPE-OPENPGP",
1318
# "+DHE-DSS"))
2203
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"))
1319
2210
# Use a fallback default, since this MUST be set.
1320
2211
priority = self.server.gnutls_priority
1321
2212
if priority is None:
1322
2213
priority = "NORMAL"
1323
(gnutls.library.functions
1324
.gnutls_priority_set_direct(session._c_object,
1325
priority, None))
1326
2214
gnutls.priority_set_direct(session._c_object,
2215
priority.encode("utf-8"),
2216
None)
2217
1327
2218
# Start communication using the Mandos protocol
1328
2219
# Get protocol number
1329
2220
line = self.request.makefile().readline()
1330
2221
logger.debug("Protocol version: %r", line)
1331
2222
try:
1332
2223
if int(line.strip().split()[0]) > 1:
1333
raise RuntimeError
2224
raise RuntimeError(line)
1334
2225
except (ValueError, IndexError, RuntimeError) as error:
1335
2226
logger.error("Unknown protocol version: %s", error)
1336
2227
return
1337
2228
1338
2229
# Start GnuTLS connection
1339
2230
try:
1340
2231
session.handshake()
1341
except gnutls.errors.GNUTLSError as error:
2232
except gnutls.Error as error:
1342
2233
logger.warning("Handshake failed: %s", error)
1343
2234
# Do not run session.bye() here: the session is not
1344
2235
# established. Just abandon the request.
1345
2236
return
1346
2237
logger.debug("Handshake succeeded")
1347
2238
1348
2239
approval_required = False
1349
2240
try:
1350
2241
try:
1351
fpr = self.fingerprint(self.peer_certificate
1352
(session))
1353
except (TypeError,
1354
gnutls.errors.GNUTLSError) as error:
2242
fpr = self.fingerprint(
2243
self.peer_certificate(session))
2244
except (TypeError, gnutls.Error) as error:
1355
2245
logger.warning("Bad certificate: %s", error)
1356
2246
return
1357
2247
logger.debug("Fingerprint: %s", fpr)
1358
2248
1359
2249
try:
1360
2250
client = ProxyClient(child_pipe, fpr,
1361
2251
self.client_address)
1362
2252
except KeyError:
1363
2253
return
1364
2254
1365
2255
if client.approval_delay:
1366
2256
delay = client.approval_delay
1367
2257
client.approvals_pending += 1
1368
2258
approval_required = True
1369
2259
1370
2260
while True:
1371
2261
if not client.enabled:
1372
2262
logger.info("Client %s is disabled",
1373
client.name)
2263
client.name)
1374
2264
if self.server.use_dbus:
1375
2265
# Emit D-Bus signal
1376
2266
client.Rejected("Disabled")
1377
2267
return
1378
1379
if client._approved or not client.approval_delay:
1380
#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
1381
2271
break
1382
elif client._approved is None:
2272
elif client.approved is None:
1383
2273
logger.info("Client %s needs approval",
1384
2274
client.name)
1385
2275
if self.server.use_dbus:
1386
2276
# Emit D-Bus signal
1387
2277
client.NeedApproval(
1388
client.approval_delay_milliseconds(),
1389
client.approved_by_default)
2278
client.approval_delay.total_seconds()
2279
* 1000, client.approved_by_default)
1390
2280
else:
1391
2281
logger.warning("Client %s was not approved",
1392
2282
client.name)
1394
2284
# Emit D-Bus signal
1395
2285
client.Rejected("Denied")
1396
2286
return
1397
1398
#wait until timeout or approved
2287
2288
# wait until timeout or approved
1399
2289
time = datetime.datetime.now()
1400
2290
client.changedstate.acquire()
1401
(client.changedstate.wait
1402
(float(client._timedelta_to_milliseconds(delay)
1403
/ 1000)))
2291
client.changedstate.wait(delay.total_seconds())
1404
2292
client.changedstate.release()
1405
2293
time2 = datetime.datetime.now()
1406
2294
if (time2 - time) >= delay:
1416
2304
break
1417
2305
else:
1418
2306
delay -= time2 - time
1419
1420
sent_size = 0
1421
while sent_size < len(client.secret):
1422
try:
1423
sent = session.send(client.secret[sent_size:])
1424
except gnutls.errors.GNUTLSError as error:
1425
logger.warning("gnutls send failed")
1426
return
1427
logger.debug("Sent: %d, remaining: %d",
1428
sent, len(client.secret)
1429
- (sent_size + sent))
1430
sent_size += sent
1431
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
2314
1432
2315
logger.info("Sending secret to %s", client.name)
1433
2316
# bump the timeout using extended_timeout
1434
client.checked_ok(client.extended_timeout)
2317
client.bump_timeout(client.extended_timeout)
1435
2318
if self.server.use_dbus:
1436
2319
# Emit D-Bus signal
1437
2320
client.GotSecret()
1438
2321
1439
2322
finally:
1440
2323
if approval_required:
1441
2324
client.approvals_pending -= 1
1442
2325
try:
1443
2326
session.bye()
1444
except gnutls.errors.GNUTLSError as error:
1445
logger.warning("GnuTLS bye failed")
1446
2327
except gnutls.Error as error:
2328
logger.warning("GnuTLS bye failed",
2329
exc_info=error)
2330
1447
2331
@staticmethod
1448
2332
def peer_certificate(session):
1449
2333
"Return the peer's OpenPGP certificate as a bytestring"
1450
2334
# If not an OpenPGP certificate...
1451
if (gnutls.library.functions
1452
.gnutls_certificate_type_get(session._c_object)
1453
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1454
# ...do the normal thing
1455
return session.peer_certificate
2335
if (gnutls.certificate_type_get(session._c_object)
2336
!= gnutls.CRT_OPENPGP):
2337
# ...return invalid data
2338
return b""
1456
2339
list_size = ctypes.c_uint(1)
1457
cert_list = (gnutls.library.functions
1458
.gnutls_certificate_get_peers
2340
cert_list = (gnutls.certificate_get_peers
1459
2341
(session._c_object, ctypes.byref(list_size)))
1460
2342
if not bool(cert_list) and list_size.value != 0:
1461
raise gnutls.errors.GNUTLSError("error getting peer"
1462
" certificate")
2343
raise gnutls.Error("error getting peer certificate")
1463
2344
if list_size.value == 0:
1464
2345
return None
1465
2346
cert = cert_list[0]
1466
2347
return ctypes.string_at(cert.data, cert.size)
1467
2348
1468
2349
@staticmethod
1469
2350
def fingerprint(openpgp):
1470
2351
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1471
2352
# New GnuTLS "datum" with the OpenPGP public key
1472
datum = (gnutls.library.types
1473
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1474
ctypes.POINTER
1475
(ctypes.c_ubyte)),
1476
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)))
1477
2357
# New empty GnuTLS certificate
1478
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1479
(gnutls.library.functions
1480
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
2358
crt = gnutls.openpgp_crt_t()
2359
gnutls.openpgp_crt_init(ctypes.byref(crt))
1481
2360
# Import the OpenPGP public key into the certificate
1482
(gnutls.library.functions
1483
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1484
gnutls.library.constants
1485
.GNUTLS_OPENPGP_FMT_RAW))
2361
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2362
gnutls.OPENPGP_FMT_RAW)
1486
2363
# Verify the self signature in the key
1487
2364
crtverify = ctypes.c_uint()
1488
(gnutls.library.functions
1489
.gnutls_openpgp_crt_verify_self(crt, 0,
1490
ctypes.byref(crtverify)))
2365
gnutls.openpgp_crt_verify_self(crt, 0,
2366
ctypes.byref(crtverify))
1491
2367
if crtverify.value != 0:
1492
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1493
raise (gnutls.errors.CertificateSecurityError
1494
("Verify failed"))
2368
gnutls.openpgp_crt_deinit(crt)
2369
raise gnutls.CertificateSecurityError("Verify failed")
1495
2370
# New buffer for the fingerprint
1496
2371
buf = ctypes.create_string_buffer(20)
1497
2372
buf_len = ctypes.c_size_t()
1498
2373
# Get the fingerprint from the certificate into the buffer
1499
(gnutls.library.functions
1500
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1501
ctypes.byref(buf_len)))
2374
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2375
ctypes.byref(buf_len))
1502
2376
# Deinit the certificate
1503
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2377
gnutls.openpgp_crt_deinit(crt)
1504
2378
# Convert the buffer to a Python bytestring
1505
2379
fpr = ctypes.string_at(buf, buf_len.value)
1506
2380
# Convert the bytestring to hexadecimal notation
1507
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
2381
hex_fpr = binascii.hexlify(fpr).upper()
1508
2382
return hex_fpr
1509
2383
1510
2384
1511
2385
class MultiprocessingMixIn(object):
1512
2386
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2387
1513
2388
def sub_process_main(self, request, address):
1514
2389
try:
1515
2390
self.finish_request(request, address)
1516
except:
2391
except Exception:
1517
2392
self.handle_error(request, address)
1518
2393
self.close_request(request)
1519
2394
1520
2395
def process_request(self, request, address):
1521
2396
"""Start a new process to process the request."""
1522
proc = multiprocessing.Process(target = self.sub_process_main,
1523
args = (request,
1524
address))
2397
proc = multiprocessing.Process(target=self.sub_process_main,
2398
args=(request, address))
1525
2399
proc.start()
1526
2400
return proc
1527
2401
1528
2402
1529
2403
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1530
2404
""" adds a pipe to the MixIn """
2405
1531
2406
def process_request(self, request, client_address):
1532
2407
"""Overrides and wraps the original process_request().
1533
2408
1534
2409
This function creates a new pipe in self.pipe
1535
2410
"""
1536
2411
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1537
2412
1538
2413
proc = MultiprocessingMixIn.process_request(self, request,
1539
2414
client_address)
1540
2415
self.child_pipe.close()
1541
2416
self.add_pipe(parent_pipe, proc)
1542
2417
1543
2418
def add_pipe(self, parent_pipe, proc):
1544
2419
"""Dummy function; override as necessary"""
1545
raise NotImplementedError
2420
raise NotImplementedError()
1546
2421
1547
2422
1548
2423
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1549
2424
socketserver.TCPServer, object):
1550
2425
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1551
2426
1552
2427
Attributes:
1553
2428
enabled: Boolean; whether this server is activated yet
1554
2429
interface: None or a network interface name (string)
1555
2430
use_ipv6: Boolean; to use IPv6 or not
1556
2431
"""
2432
1557
2433
def __init__(self, server_address, RequestHandlerClass,
1558
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
"""
1559
2440
self.interface = interface
1560
2441
if use_ipv6:
1561
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.
1562
2470
socketserver.TCPServer.__init__(self, server_address,
1563
2471
RequestHandlerClass)
2472
1564
2473
def server_bind(self):
1565
2474
"""This overrides the normal server_bind() function
1566
2475
to bind to an interface if one was specified, and also NOT to
1567
2476
bind to an address or port if they were not specified."""
2477
global SO_BINDTODEVICE
1568
2478
if self.interface is not None:
1569
2479
if SO_BINDTODEVICE is None:
1570
logger.error("SO_BINDTODEVICE does not exist;"
1571
" cannot bind to interface %s",
1572
self.interface)
1573
else:
1574
try:
1575
self.socket.setsockopt(socket.SOL_SOCKET,
1576
SO_BINDTODEVICE,
1577
str(self.interface
1578
+ '\0'))
1579
except socket.error as error:
1580
if error[0] == errno.EPERM:
1581
logger.error("No permission to"
1582
" bind to interface %s",
1583
self.interface)
1584
elif error[0] == errno.ENOPROTOOPT:
1585
logger.error("SO_BINDTODEVICE not available;"
1586
" cannot bind to interface %s",
1587
self.interface)
1588
else:
1589
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
1590
2501
# Only bind(2) the socket if we really need to.
1591
2502
if self.server_address[0] or self.server_address[1]:
1592
2503
if not self.server_address[0]:
1593
2504
if self.address_family == socket.AF_INET6:
1594
any_address = "::" # in6addr_any
2505
any_address = "::" # in6addr_any
1595
2506
else:
1596
any_address = socket.INADDR_ANY
2507
any_address = "0.0.0.0" # INADDR_ANY
1597
2508
self.server_address = (any_address,
1598
2509
self.server_address[1])
1599
2510
elif not self.server_address[1]:
1600
self.server_address = (self.server_address[0],
1601
0)
2511
self.server_address = (self.server_address[0], 0)
1602
2512
# if self.interface:
1603
2513
# self.server_address = (self.server_address[0],
1604
2514
# 0, # port
1610
2520
1611
2521
class MandosServer(IPv6_TCPServer):
1612
2522
"""Mandos server.
1613
2523
1614
2524
Attributes:
1615
2525
clients: set of Client objects
1616
2526
gnutls_priority GnuTLS priority string
1617
2527
use_dbus: Boolean; to emit D-Bus signals or not
1618
1619
Assumes a gobject.MainLoop event loop.
2528
2529
Assumes a GLib.MainLoop event loop.
1620
2530
"""
2531
1621
2532
def __init__(self, server_address, RequestHandlerClass,
1622
interface=None, use_ipv6=True, clients=None,
1623
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):
1624
2539
self.enabled = False
1625
2540
self.clients = clients
1626
2541
if self.clients is None:
1627
self.clients = set()
2542
self.clients = {}
1628
2543
self.use_dbus = use_dbus
1629
2544
self.gnutls_priority = gnutls_priority
1630
2545
IPv6_TCPServer.__init__(self, server_address,
1631
2546
RequestHandlerClass,
1632
interface = interface,
1633
use_ipv6 = use_ipv6)
2547
interface=interface,
2548
use_ipv6=use_ipv6,
2549
socketfd=socketfd)
2550
1634
2551
def server_activate(self):
1635
2552
if self.enabled:
1636
2553
return socketserver.TCPServer.server_activate(self)
1637
2554
1638
2555
def enable(self):
1639
2556
self.enabled = True
1640
2557
1641
2558
def add_pipe(self, parent_pipe, proc):
1642
2559
# Call "handle_ipc" for both data and EOF events
1643
gobject.io_add_watch(parent_pipe.fileno(),
1644
gobject.IO_IN | gobject.IO_HUP,
1645
functools.partial(self.handle_ipc,
1646
parent_pipe =
1647
parent_pipe,
1648
proc = proc))
1649
1650
def handle_ipc(self, source, condition, parent_pipe=None,
1651
proc = None, client_object=None):
1652
condition_names = {
1653
gobject.IO_IN: "IN", # There is data to read.
1654
gobject.IO_OUT: "OUT", # Data can be written (without
1655
# blocking).
1656
gobject.IO_PRI: "PRI", # There is urgent data to read.
1657
gobject.IO_ERR: "ERR", # Error condition.
1658
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1659
# broken, usually for pipes and
1660
# sockets).
1661
}
1662
conditions_string = ' | '.join(name
1663
for cond, name in
1664
condition_names.iteritems()
1665
if cond & condition)
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,
2570
client_object=None):
1666
2571
# error, or the other end of multiprocessing.Pipe has closed
1667
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
2572
if condition & (GLib.IO_ERR | GLib.IO_HUP):
1668
2573
# Wait for other process to exit
1669
2574
proc.join()
1670
2575
return False
1671
2576
1672
2577
# Read a request from the child
1673
2578
request = parent_pipe.recv()
1674
2579
command = request[0]
1675
2580
1676
2581
if command == 'init':
1677
fpr = request[1]
2582
fpr = request[1].decode("ascii")
1678
2583
address = request[2]
1679
1680
for c in self.clients:
2584
2585
for c in self.clients.values():
1681
2586
if c.fingerprint == fpr:
1682
2587
client = c
1683
2588
break
1690
2595
address[0])
1691
2596
parent_pipe.send(False)
1692
2597
return False
1693
1694
gobject.io_add_watch(parent_pipe.fileno(),
1695
gobject.IO_IN | gobject.IO_HUP,
1696
functools.partial(self.handle_ipc,
1697
parent_pipe =
1698
parent_pipe,
1699
proc = proc,
1700
client_object =
1701
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))
1702
2606
parent_pipe.send(True)
1703
2607
# remove the old hook in favor of the new above hook on
1704
2608
# same fileno
1707
2611
funcname = request[1]
1708
2612
args = request[2]
1709
2613
kwargs = request[3]
1710
2614
1711
2615
parent_pipe.send(('data', getattr(client_object,
1712
2616
funcname)(*args,
1713
**kwargs)))
1714
2617
**kwargs)))
2618
1715
2619
if command == 'getattr':
1716
2620
attrname = request[1]
1717
if callable(client_object.__getattribute__(attrname)):
1718
parent_pipe.send(('function',))
2621
if isinstance(client_object.__getattribute__(attrname),
2622
collections.Callable):
2623
parent_pipe.send(('function', ))
1719
2624
else:
1720
parent_pipe.send(('data', client_object
1721
.__getattribute__(attrname)))
1722
2625
parent_pipe.send((
2626
'data', client_object.__getattribute__(attrname)))
2627
1723
2628
if command == 'setattr':
1724
2629
attrname = request[1]
1725
2630
value = request[2]
1726
2631
setattr(client_object, attrname, value)
1727
2632
1728
2633
return True
1729
2634
1730
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
1731
2735
def string_to_delta(interval):
1732
2736
"""Parse a string and return a datetime.timedelta
1733
2737
1734
2738
>>> string_to_delta('7d')
1735
2739
datetime.timedelta(7)
1736
2740
>>> string_to_delta('60s')
1744
2748
>>> string_to_delta('5m 30s')
1745
2749
datetime.timedelta(0, 330)
1746
2750
"""
2751
2752
try:
2753
return rfc3339_duration_to_delta(interval)
2754
except ValueError:
2755
pass
2756
1747
2757
timevalue = datetime.timedelta(0)
1748
2758
for s in interval.split():
1749
2759
try:
1750
suffix = unicode(s[-1])
2760
suffix = s[-1]
1751
2761
value = int(s[:-1])
1752
2762
if suffix == "d":
1753
2763
delta = datetime.timedelta(value)
1760
2770
elif suffix == "w":
1761
2771
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1762
2772
else:
1763
raise ValueError("Unknown suffix %r" % suffix)
1764
except (ValueError, IndexError) as e:
2773
raise ValueError("Unknown suffix {!r}".format(suffix))
2774
except IndexError as e:
1765
2775
raise ValueError(*(e.args))
1766
2776
timevalue += delta
1767
2777
return timevalue
1768
2778
1769
2779
1770
def if_nametoindex(interface):
1771
"""Call the C function if_nametoindex(), or equivalent
1772
1773
Note: This function cannot accept a unicode string."""
1774
global if_nametoindex
1775
try:
1776
if_nametoindex = (ctypes.cdll.LoadLibrary
1777
(ctypes.util.find_library("c"))
1778
.if_nametoindex)
1779
except (OSError, AttributeError):
1780
logger.warning("Doing if_nametoindex the hard way")
1781
def if_nametoindex(interface):
1782
"Get an interface index the hard way, i.e. using fcntl()"
1783
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1784
with contextlib.closing(socket.socket()) as s:
1785
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1786
struct.pack(str("16s16x"),
1787
interface))
1788
interface_index = struct.unpack(str("I"),
1789
ifreq[16:20])[0]
1790
return interface_index
1791
return if_nametoindex(interface)
1792
1793
1794
def daemon(nochdir = False, noclose = False):
2780
def daemon(nochdir=False, noclose=False):
1795
2781
"""See daemon(3). Standard BSD Unix function.
1796
2782
1797
2783
This should really exist as os.daemon, but it doesn't (yet)."""
1798
2784
if os.fork():
1799
2785
sys.exit()
1804
2790
sys.exit()
1805
2791
if not noclose:
1806
2792
# Close all standard open file descriptors
1807
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2793
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1808
2794
if not stat.S_ISCHR(os.fstat(null).st_mode):
1809
2795
raise OSError(errno.ENODEV,
1810
"%s not a character device"
1811
% os.path.devnull)
2796
"{} not a character device"
2797
.format(os.devnull))
1812
2798
os.dup2(null, sys.stdin.fileno())
1813
2799
os.dup2(null, sys.stdout.fileno())
1814
2800
os.dup2(null, sys.stderr.fileno())
1817
2803
1818
2804
1819
2805
def main():
1820
2806
1821
2807
##################################################################
1822
2808
# Parsing of options, both command line and config file
1823
2809
1824
2810
parser = argparse.ArgumentParser()
1825
2811
parser.add_argument("-v", "--version", action="version",
1826
version = "%%(prog)s %s" % version,
2812
version="%(prog)s {}".format(version),
1827
2813
help="show version number and exit")
1828
2814
parser.add_argument("-i", "--interface", metavar="IF",
1829
2815
help="Bind to interface IF")
1835
2821
help="Run self-test")
1836
2822
parser.add_argument("--debug", action="store_true",
1837
2823
help="Debug mode; run in foreground and log"
1838
" to terminal")
2824
" to terminal", default=None)
1839
2825
parser.add_argument("--debuglevel", metavar="LEVEL",
1840
2826
help="Debug level for stdout output")
1841
2827
parser.add_argument("--priority", help="GnuTLS"
1848
2834
" files")
1849
2835
parser.add_argument("--no-dbus", action="store_false",
1850
2836
dest="use_dbus", help="Do not provide D-Bus"
1851
" system bus interface")
2837
" system bus interface", default=None)
1852
2838
parser.add_argument("--no-ipv6", action="store_false",
1853
dest="use_ipv6", help="Do not use IPv6")
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
1854
2855
options = parser.parse_args()
1855
2856
1856
2857
if options.check:
1857
2858
import doctest
1858
doctest.testmod()
1859
sys.exit()
1860
2859
fail_count, test_count = doctest.testmod()
2860
sys.exit(os.EX_OK if fail_count == 0 else 1)
2861
1861
2862
# Default values for config file for server-global settings
1862
server_defaults = { "interface": "",
1863
"address": "",
1864
"port": "",
1865
"debug": "False",
1866
"priority":
1867
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1868
"servicename": "Mandos",
1869
"use_dbus": "True",
1870
"use_ipv6": "True",
1871
"debuglevel": "",
1872
}
1873
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
1874
2881
# Parse config file for server-global settings
1875
2882
server_config = configparser.SafeConfigParser(server_defaults)
1876
2883
del server_defaults
1877
server_config.read(os.path.join(options.configdir,
1878
"mandos.conf"))
2884
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1879
2885
# Convert the SafeConfigParser object to a dict
1880
2886
server_settings = server_config.defaults()
1881
2887
# Use the appropriate methods on the non-string config options
1882
for option in ("debug", "use_dbus", "use_ipv6"):
2888
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2889
"foreground", "zeroconf"):
1883
2890
server_settings[option] = server_config.getboolean("DEFAULT",
1884
2891
option)
1885
2892
if server_settings["port"]:
1886
2893
server_settings["port"] = server_config.getint("DEFAULT",
1887
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"])
1888
2904
del server_config
1889
2905
1890
2906
# Override the settings from the config file with command line
1891
2907
# options, if set.
1892
2908
for option in ("interface", "address", "port", "debug",
1893
"priority", "servicename", "configdir",
1894
"use_dbus", "use_ipv6", "debuglevel"):
2909
"priority", "servicename", "configdir", "use_dbus",
2910
"use_ipv6", "debuglevel", "restore", "statedir",
2911
"socket", "foreground", "zeroconf"):
1895
2912
value = getattr(options, option)
1896
2913
if value is not None:
1897
2914
server_settings[option] = value
1898
2915
del options
1899
2916
# Force all strings to be unicode
1900
2917
for option in server_settings.keys():
1901
if type(server_settings[option]) is str:
1902
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
1903
2928
# Now we have our good server settings in "server_settings"
1904
2929
1905
2930
##################################################################
1906
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
1907
2937
# For convenience
1908
2938
debug = server_settings["debug"]
1909
2939
debuglevel = server_settings["debuglevel"]
1910
2940
use_dbus = server_settings["use_dbus"]
1911
2941
use_ipv6 = server_settings["use_ipv6"]
1912
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)
2955
1913
2956
if server_settings["servicename"] != "Mandos":
1914
syslogger.setFormatter(logging.Formatter
1915
('Mandos (%s) [%%(process)d]:'
1916
' %%(levelname)s: %%(message)s'
1917
% server_settings["servicename"]))
1918
2957
syslogger.setFormatter(
2958
logging.Formatter('Mandos ({}) [%(process)d]:'
2959
' %(levelname)s: %(message)s'.format(
2960
server_settings["servicename"])))
2961
1919
2962
# Parse config file with clients
1920
client_defaults = { "timeout": "5m",
1921
"extended_timeout": "15m",
1922
"interval": "2m",
1923
"checker": "fping -q -- %%(host)s",
1924
"host": "",
1925
"approval_delay": "0s",
1926
"approval_duration": "1s",
1927
}
1928
client_config = configparser.SafeConfigParser(client_defaults)
2963
client_config = configparser.SafeConfigParser(Client
2964
.client_defaults)
1929
2965
client_config.read(os.path.join(server_settings["configdir"],
1930
2966
"clients.conf"))
1931
2967
1932
2968
global mandos_dbus_service
1933
2969
mandos_dbus_service = None
1934
1935
tcp_server = MandosServer((server_settings["address"],
1936
server_settings["port"]),
1937
ClientHandler,
1938
interface=(server_settings["interface"]
1939
or None),
1940
use_ipv6=use_ipv6,
1941
gnutls_priority=
1942
server_settings["priority"],
1943
use_dbus=use_dbus)
1944
if not debug:
1945
pidfilename = "/var/run/mandos.pid"
1946
try:
1947
pidfile = open(pidfilename, "w")
1948
except IOError:
1949
logger.error("Could not open file %r", pidfilename)
1950
1951
try:
1952
uid = pwd.getpwnam("_mandos").pw_uid
1953
gid = pwd.getpwnam("_mandos").pw_gid
1954
except KeyError:
1955
try:
1956
uid = pwd.getpwnam("mandos").pw_uid
1957
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
1958
3000
except KeyError:
1959
try:
1960
uid = pwd.getpwnam("nobody").pw_uid
1961
gid = pwd.getpwnam("nobody").pw_gid
1962
except KeyError:
1963
uid = 65534
1964
gid = 65534
3001
continue
3002
else:
3003
uid = 65534
3004
gid = 65534
1965
3005
try:
1966
3006
os.setgid(gid)
1967
3007
os.setuid(uid)
3008
if debug:
3009
logger.debug("Did setuid/setgid to {}:{}".format(uid,
3010
gid))
1968
3011
except OSError as error:
1969
if error[0] != errno.EPERM:
1970
raise error
1971
1972
if not debug and not debuglevel:
1973
syslogger.setLevel(logging.WARNING)
1974
console.setLevel(logging.WARNING)
1975
if debuglevel:
1976
level = getattr(logging, debuglevel.upper())
1977
syslogger.setLevel(level)
1978
console.setLevel(level)
1979
3012
logger.warning("Failed to setuid/setgid to {}:{}: {}"
3013
.format(uid, gid, os.strerror(error.errno)))
3014
if error.errno != errno.EPERM:
3015
raise
3016
1980
3017
if debug:
1981
3018
# Enable all possible GnuTLS debugging
1982
3019
1983
3020
# "Use a log level over 10 to enable all debugging options."
1984
3021
# - GnuTLS manual
1985
gnutls.library.functions.gnutls_global_set_log_level(11)
1986
1987
@gnutls.library.types.gnutls_log_func
3022
gnutls.global_set_log_level(11)
3023
3024
@gnutls.log_func
1988
3025
def debug_gnutls(level, string):
1989
3026
logger.debug("GnuTLS: %s", string[:-1])
1990
1991
(gnutls.library.functions
1992
.gnutls_global_set_log_function(debug_gnutls))
1993
3027
3028
gnutls.global_set_log_function(debug_gnutls)
3029
1994
3030
# Redirect stdin so all checkers get /dev/null
1995
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
3031
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1996
3032
os.dup2(null, sys.stdin.fileno())
1997
3033
if null > 2:
1998
3034
os.close(null)
1999
else:
2000
# No console logging
2001
logger.removeHandler(console)
2002
3035
2003
3036
# Need to fork before connecting to D-Bus
2004
if not debug:
3037
if not foreground:
2005
3038
# Close all input and output, do double fork, etc.
2006
3039
daemon()
2007
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
2008
3045
global main_loop
2009
3046
# From the Avahi example code
2010
DBusGMainLoop(set_as_default=True )
2011
main_loop = gobject.MainLoop()
3047
DBusGMainLoop(set_as_default=True)
3048
main_loop = GLib.MainLoop()
2012
3049
bus = dbus.SystemBus()
2013
3050
# End of Avahi example code
2014
3051
if use_dbus:
2015
3052
try:
2016
3053
bus_name = dbus.service.BusName("se.recompile.Mandos",
2017
bus, do_not_queue=True)
2018
old_bus_name = (dbus.service.BusName
2019
("se.bsnet.fukt.Mandos", bus,
2020
do_not_queue=True))
2021
except dbus.exceptions.NameExistsException as e:
2022
logger.error(unicode(e) + ", disabling D-Bus")
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)
2023
3061
use_dbus = False
2024
3062
server_settings["use_dbus"] = False
2025
3063
tcp_server.use_dbus = False
2026
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2027
service = AvahiService(name = server_settings["servicename"],
2028
servicetype = "_mandos._tcp",
2029
protocol = protocol, bus = bus)
2030
if server_settings["interface"]:
2031
service.interface = (if_nametoindex
2032
(str(server_settings["interface"])))
2033
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
2034
3075
global multiprocessing_manager
2035
3076
multiprocessing_manager = multiprocessing.Manager()
2036
3077
2037
3078
client_class = Client
2038
3079
if use_dbus:
2039
client_class = functools.partial(ClientDBusTransitional,
2040
bus = bus)
2041
def client_config_items(config, section):
2042
special_settings = {
2043
"approved_by_default":
2044
lambda: config.getboolean(section,
2045
"approved_by_default"),
2046
}
2047
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))
2048
3208
try:
2049
yield (name, special_settings[name]())
2050
except KeyError:
2051
yield (name, value)
2052
2053
tcp_server.clients.update(set(
2054
client_class(name = section,
2055
config= dict(client_config_items(
2056
client_config, section)))
2057
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
2058
3234
if not tcp_server.clients:
2059
3235
logger.warning("No clients defined")
2060
2061
if not debug:
2062
try:
2063
with pidfile:
2064
pid = os.getpid()
2065
pidfile.write(str(pid) + "\n".encode("utf-8"))
2066
del pidfile
2067
except IOError:
2068
logger.error("Could not write to file %r with PID %d",
2069
pidfilename, pid)
2070
except NameError:
2071
# "pidfile" was never created
2072
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
2073
3247
del pidfilename
2074
2075
signal.signal(signal.SIGINT, signal.SIG_IGN)
2076
2077
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2078
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2079
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
2080
3253
if use_dbus:
2081
class MandosDBusService(dbus.service.Object):
3254
3255
@alternate_dbus_interfaces(
3256
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3257
class MandosDBusService(DBusObjectWithObjectManager):
2082
3258
"""A D-Bus proxy object"""
3259
2083
3260
def __init__(self):
2084
3261
dbus.service.Object.__init__(self, bus, "/")
3262
2085
3263
_interface = "se.recompile.Mandos"
2086
3264
2087
3265
@dbus.service.signal(_interface, signature="o")
2088
3266
def ClientAdded(self, objpath):
2089
3267
"D-Bus signal"
2090
3268
pass
2091
3269
2092
3270
@dbus.service.signal(_interface, signature="ss")
2093
3271
def ClientNotFound(self, fingerprint, address):
2094
3272
"D-Bus signal"
2095
3273
pass
2096
3274
3275
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3276
"true"})
2097
3277
@dbus.service.signal(_interface, signature="os")
2098
3278
def ClientRemoved(self, objpath, name):
2099
3279
"D-Bus signal"
2100
3280
pass
2101
3281
3282
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3283
"true"})
2102
3284
@dbus.service.method(_interface, out_signature="ao")
2103
3285
def GetAllClients(self):
2104
3286
"D-Bus method"
2105
return dbus.Array(c.dbus_object_path
2106
for c in tcp_server.clients)
2107
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"})
2108
3292
@dbus.service.method(_interface,
2109
3293
out_signature="a{oa{sv}}")
2110
3294
def GetAllClientsWithProperties(self):
2111
3295
"D-Bus method"
2112
3296
return dbus.Dictionary(
2113
((c.dbus_object_path, c.GetAll(""))
2114
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()},
2115
3300
signature="oa{sv}")
2116
3301
2117
3302
@dbus.service.method(_interface, in_signature="o")
2118
3303
def RemoveClient(self, object_path):
2119
3304
"D-Bus method"
2120
for c in tcp_server.clients:
3305
for c in tcp_server.clients.values():
2121
3306
if c.dbus_object_path == object_path:
2122
tcp_server.clients.remove(c)
3307
del tcp_server.clients[c.name]
2123
3308
c.remove_from_connection()
2124
# Don't signal anything except ClientRemoved
3309
# Don't signal the disabling
2125
3310
c.disable(quiet=True)
2126
# Emit D-Bus signal
2127
self.ClientRemoved(object_path, c.name)
3311
# Emit D-Bus signal for removal
3312
self.client_removed_signal(c)
2128
3313
return
2129
3314
raise KeyError(object_path)
2130
3315
2131
3316
del _interface
2132
2133
class MandosDBusServiceTransitional(MandosDBusService):
2134
__metaclass__ = AlternateDBusNamesMetaclass
2135
mandos_dbus_service = MandosDBusServiceTransitional()
2136
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
3354
mandos_dbus_service = MandosDBusService()
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
2137
3361
def cleanup():
2138
3362
"Cleanup function; run on exit"
2139
service.cleanup()
2140
2141
multiprocessing.active_children()
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
2142
3425
while tcp_server.clients:
2143
client = tcp_server.clients.pop()
3426
name, client = tcp_server.clients.popitem()
2144
3427
if use_dbus:
2145
3428
client.remove_from_connection()
2146
client.disable_hook = None
2147
# Don't signal anything except ClientRemoved
3429
# Don't signal the disabling
2148
3430
client.disable(quiet=True)
3431
# Emit D-Bus signal for removal
2149
3432
if use_dbus:
2150
# Emit D-Bus signal
2151
mandos_dbus_service.ClientRemoved(client
2152
.dbus_object_path,
2153
client.name)
2154
3433
mandos_dbus_service.client_removed_signal(client)
3434
client_settings.clear()
3435
2155
3436
atexit.register(cleanup)
2156
2157
for client in tcp_server.clients:
3437
3438
for client in tcp_server.clients.values():
2158
3439
if use_dbus:
2159
# Emit D-Bus signal
2160
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2161
client.enable()
2162
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
2163
3446
tcp_server.enable()
2164
3447
tcp_server.server_activate()
2165
3448
2166
3449
# Find out what port we got
2167
service.port = tcp_server.socket.getsockname()[1]
3450
if zeroconf:
3451
service.port = tcp_server.socket.getsockname()[1]
2168
3452
if use_ipv6:
2169
3453
logger.info("Now listening on address %r, port %d,"
2170
" flowinfo %d, scope_id %d"
2171
% tcp_server.socket.getsockname())
3454
" flowinfo %d, scope_id %d",
3455
*tcp_server.socket.getsockname())
2172
3456
else: # IPv4
2173
logger.info("Now listening on address %r, port %d"
2174
% tcp_server.socket.getsockname())
2175
2176
#service.interface = tcp_server.socket.getsockname()[3]
2177
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
2178
3462
try:
2179
# From the Avahi example code
2180
try:
2181
service.activate()
2182
except dbus.exceptions.DBusException as error:
2183
logger.critical("DBusException: %s", error)
2184
cleanup()
2185
sys.exit(1)
2186
# End of Avahi example code
2187
2188
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2189
lambda *args, **kwargs:
2190
(tcp_server.handle_request
2191
(*args[2:], **kwargs) or True))
2192
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
2193
3478
logger.debug("Starting main loop")
2194
3479
main_loop.run()
2195
3480
except AvahiError as error:
2196
logger.critical("AvahiError: %s", error)
3481
logger.critical("Avahi Error", exc_info=error)
2197
3482
cleanup()
2198
3483
sys.exit(1)
2199
3484
except KeyboardInterrupt:
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0