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- Committer: teddy at recompile
- Date: 2020-02-05 21:39:28 UTC
- Revision ID: teddy@recompile.se-20200205213928-vpvt0fwfg47ikv6f
Allow users to alter ask-password-mandos.service
If a user uses dracut with systemd and wishes to modify the options
passed to password-agent(8mandos) or mandos-client(8mandos), they
should be able to do so by simply creating a file
/etc/systemd/system/ask-password-mandos.service.d/override.conf,
containing, for instance:
[Service]
Environment=MANDOS_CLIENT_OPTIONS=--debug
Adding PASSWORD_AGENT_OPTIONS should also be possible (but should not
normally be needed).
* dracut-module/ask-password-mandos.service ([Service]/ExecStart): Add
$PASSWORD_AGENT_OPTIONS before "--" and "$MANDOS_CLIENT_OPTIONS" to
end of line.
* dracut-module/module-setup.sh (install): Install all files named
/etc/systemd/system/ask-password-mandos.service.d/*.conf if any
exists. Also add --dh-params before $MANDOS_CLIENT_OPTIONS instead
of at end of line.
If a user uses dracut with systemd and wishes to modify the options
passed to password-agent(8mandos) or mandos-client(8mandos), they
should be able to do so by simply creating a file
/etc/systemd/system/ask-password-mandos.service.d/override.conf,
containing, for instance:
[Service]
Environment=MANDOS_CLIENT_OPTIONS=--debug
Adding PASSWORD_AGENT_OPTIONS should also be possible (but should not
normally be needed).
* dracut-module/ask-password-mandos.service ([Service]/ExecStart): Add
$PASSWORD_AGENT_OPTIONS before "--" and "$MANDOS_CLIENT_OPTIONS" to
end of line.
* dracut-module/module-setup.sh (install): Install all files named
/etc/systemd/system/ask-password-mandos.service.d/*.conf if any
exists. Also add --dh-params before $MANDOS_CLIENT_OPTIONS instead
of at end of line.
- files added:
- bugs.xml
- debian/tests
- debian/upstream
- dracut-module
- plugin-helpers
- files removed:
- initramfs-tools-hook-conf
- files modified:
- .bzrignore
added
removed
mandos
1
#!/usr/bin/python
2
# -*- mode: python; coding: utf-8 -*-
3
#
1
#!/usr/bin/python3 -bI
2
# -*- mode: python; after-save-hook: (lambda () (let ((command (if (fboundp 'file-local-name) (file-local-name (buffer-file-name)) (or (file-remote-p (buffer-file-name) 'localname) (buffer-file-name))))) (if (= (progn (if (get-buffer "*Test*") (kill-buffer "*Test*")) (process-file-shell-command (format "%s --check" (shell-quote-argument command)) nil "*Test*")) 0) (let ((w (get-buffer-window "*Test*"))) (if w (delete-window w))) (progn (with-current-buffer "*Test*" (compilation-mode)) (display-buffer "*Test*" '(display-buffer-in-side-window)))))); coding: utf-8 -*-
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 © 2008-2012 Teddy Hogeborn
15
# Copyright © 2008-2012 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 © 2008-2019 Teddy Hogeborn
15
# Copyright © 2008-2019 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
from future_builtins import *
38
try:
39
from future_builtins import *
40
except ImportError:
41
pass
38
42
39
import SocketServer as socketserver
43
try:
44
import SocketServer as socketserver
45
except ImportError:
46
import socketserver
40
47
import socket
41
48
import argparse
42
49
import datetime
43
50
import errno
44
import gnutls.crypto
45
import gnutls.connection
46
import gnutls.errors
47
import gnutls.library.functions
48
import gnutls.library.constants
49
import gnutls.library.types
50
import ConfigParser as configparser
51
try:
52
import ConfigParser as configparser
53
except ImportError:
54
import configparser
51
55
import sys
52
56
import re
53
57
import os
62
66
import struct
63
67
import fcntl
64
68
import functools
65
import cPickle as pickle
69
try:
70
import cPickle as pickle
71
except ImportError:
72
import pickle
66
73
import multiprocessing
67
74
import types
68
75
import binascii
69
76
import tempfile
70
77
import itertools
78
import collections
79
import codecs
80
import unittest
81
import random
71
82
72
83
import dbus
73
84
import dbus.service
74
import gobject
75
import avahi
85
import gi
86
from gi.repository import GLib
76
87
from dbus.mainloop.glib import DBusGMainLoop
77
88
import ctypes
78
89
import ctypes.util
79
90
import xml.dom.minidom
80
91
import inspect
81
import GnuPGInterface
82
92
93
if sys.version_info.major == 2:
94
__metaclass__ = type
95
str = unicode
96
97
# Show warnings by default
98
if not sys.warnoptions:
99
import warnings
100
warnings.simplefilter("default")
101
102
# Try to find the value of SO_BINDTODEVICE:
83
103
try:
104
# This is where SO_BINDTODEVICE is in Python 3.3 (or 3.4?) and
105
# newer, and it is also the most natural place for it:
84
106
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
85
107
except AttributeError:
86
108
try:
109
# This is where SO_BINDTODEVICE was up to and including Python
110
# 2.6, and also 3.2:
87
111
from IN import SO_BINDTODEVICE
88
112
except ImportError:
89
SO_BINDTODEVICE = None
90
91
version = "1.5.3"
113
# In Python 2.7 it seems to have been removed entirely.
114
# Try running the C preprocessor:
115
try:
116
cc = subprocess.Popen(["cc", "--language=c", "-E",
117
"/dev/stdin"],
118
stdin=subprocess.PIPE,
119
stdout=subprocess.PIPE)
120
stdout = cc.communicate(
121
"#include <sys/socket.h>\nSO_BINDTODEVICE\n")[0]
122
SO_BINDTODEVICE = int(stdout.splitlines()[-1])
123
except (OSError, ValueError, IndexError):
124
# No value found
125
SO_BINDTODEVICE = None
126
127
if sys.version_info < (3, 2):
128
configparser.Configparser = configparser.SafeConfigParser
129
130
version = "1.8.9"
92
131
stored_state_file = "clients.pickle"
93
132
94
133
logger = logging.getLogger()
95
syslogger = (logging.handlers.SysLogHandler
96
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
97
address = str("/dev/log")))
134
logging.captureWarnings(True) # Show warnings via the logging system
135
syslogger = None
98
136
99
137
try:
100
if_nametoindex = (ctypes.cdll.LoadLibrary
101
(ctypes.util.find_library("c"))
102
.if_nametoindex)
138
if_nametoindex = ctypes.cdll.LoadLibrary(
139
ctypes.util.find_library("c")).if_nametoindex
103
140
except (OSError, AttributeError):
141
104
142
def if_nametoindex(interface):
105
143
"Get an interface index the hard way, i.e. using fcntl()"
106
144
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
107
145
with contextlib.closing(socket.socket()) as s:
108
146
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
109
struct.pack(str("16s16x"),
110
interface))
111
interface_index = struct.unpack(str("I"),
112
ifreq[16:20])[0]
147
struct.pack(b"16s16x", interface))
148
interface_index = struct.unpack("I", ifreq[16:20])[0]
113
149
return interface_index
114
150
115
151
152
def copy_function(func):
153
"""Make a copy of a function"""
154
if sys.version_info.major == 2:
155
return types.FunctionType(func.func_code,
156
func.func_globals,
157
func.func_name,
158
func.func_defaults,
159
func.func_closure)
160
else:
161
return types.FunctionType(func.__code__,
162
func.__globals__,
163
func.__name__,
164
func.__defaults__,
165
func.__closure__)
166
167
116
168
def initlogger(debug, level=logging.WARNING):
117
169
"""init logger and add loglevel"""
118
170
171
global syslogger
172
syslogger = (logging.handlers.SysLogHandler(
173
facility=logging.handlers.SysLogHandler.LOG_DAEMON,
174
address="/dev/log"))
119
175
syslogger.setFormatter(logging.Formatter
120
176
('Mandos [%(process)d]: %(levelname)s:'
121
177
' %(message)s'))
122
178
logger.addHandler(syslogger)
123
179
124
180
if debug:
125
181
console = logging.StreamHandler()
126
182
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
136
192
pass
137
193
138
194
139
class PGPEngine(object):
195
class PGPEngine:
140
196
"""A simple class for OpenPGP symmetric encryption & decryption"""
197
141
198
def __init__(self):
142
self.gnupg = GnuPGInterface.GnuPG()
143
199
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
144
self.gnupg = GnuPGInterface.GnuPG()
145
self.gnupg.options.meta_interactive = False
146
self.gnupg.options.homedir = self.tempdir
147
self.gnupg.options.extra_args.extend(['--force-mdc',
148
'--quiet',
149
'--no-use-agent'])
150
200
self.gpg = "gpg"
201
try:
202
output = subprocess.check_output(["gpgconf"])
203
for line in output.splitlines():
204
name, text, path = line.split(b":")
205
if name == b"gpg":
206
self.gpg = path
207
break
208
except OSError as e:
209
if e.errno != errno.ENOENT:
210
raise
211
self.gnupgargs = ['--batch',
212
'--homedir', self.tempdir,
213
'--force-mdc',
214
'--quiet']
215
# Only GPG version 1 has the --no-use-agent option.
216
if self.gpg == b"gpg" or self.gpg.endswith(b"/gpg"):
217
self.gnupgargs.append("--no-use-agent")
218
151
219
def __enter__(self):
152
220
return self
153
154
def __exit__ (self, exc_type, exc_value, traceback):
221
222
def __exit__(self, exc_type, exc_value, traceback):
155
223
self._cleanup()
156
224
return False
157
225
158
226
def __del__(self):
159
227
self._cleanup()
160
228
161
229
def _cleanup(self):
162
230
if self.tempdir is not None:
163
231
# Delete contents of tempdir
164
232
for root, dirs, files in os.walk(self.tempdir,
165
topdown = False):
233
topdown=False):
166
234
for filename in files:
167
235
os.remove(os.path.join(root, filename))
168
236
for dirname in dirs:
170
238
# Remove tempdir
171
239
os.rmdir(self.tempdir)
172
240
self.tempdir = None
173
241
174
242
def password_encode(self, password):
175
243
# Passphrase can not be empty and can not contain newlines or
176
244
# NUL bytes. So we prefix it and hex encode it.
177
return b"mandos" + binascii.hexlify(password)
178
245
encoded = b"mandos" + binascii.hexlify(password)
246
if len(encoded) > 2048:
247
# GnuPG can't handle long passwords, so encode differently
248
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
249
.replace(b"\n", b"\\n")
250
.replace(b"\0", b"\\x00"))
251
return encoded
252
179
253
def encrypt(self, data, password):
180
self.gnupg.passphrase = self.password_encode(password)
181
with open(os.devnull, "w") as devnull:
182
try:
183
proc = self.gnupg.run(['--symmetric'],
184
create_fhs=['stdin', 'stdout'],
185
attach_fhs={'stderr': devnull})
186
with contextlib.closing(proc.handles['stdin']) as f:
187
f.write(data)
188
with contextlib.closing(proc.handles['stdout']) as f:
189
ciphertext = f.read()
190
proc.wait()
191
except IOError as e:
192
raise PGPError(e)
193
self.gnupg.passphrase = None
254
passphrase = self.password_encode(password)
255
with tempfile.NamedTemporaryFile(
256
dir=self.tempdir) as passfile:
257
passfile.write(passphrase)
258
passfile.flush()
259
proc = subprocess.Popen([self.gpg, '--symmetric',
260
'--passphrase-file',
261
passfile.name]
262
+ self.gnupgargs,
263
stdin=subprocess.PIPE,
264
stdout=subprocess.PIPE,
265
stderr=subprocess.PIPE)
266
ciphertext, err = proc.communicate(input=data)
267
if proc.returncode != 0:
268
raise PGPError(err)
194
269
return ciphertext
195
270
196
271
def decrypt(self, data, password):
197
self.gnupg.passphrase = self.password_encode(password)
198
with open(os.devnull, "w") as devnull:
199
try:
200
proc = self.gnupg.run(['--decrypt'],
201
create_fhs=['stdin', 'stdout'],
202
attach_fhs={'stderr': devnull})
203
with contextlib.closing(proc.handles['stdin']) as f:
204
f.write(data)
205
with contextlib.closing(proc.handles['stdout']) as f:
206
decrypted_plaintext = f.read()
207
proc.wait()
208
except IOError as e:
209
raise PGPError(e)
210
self.gnupg.passphrase = None
272
passphrase = self.password_encode(password)
273
with tempfile.NamedTemporaryFile(
274
dir=self.tempdir) as passfile:
275
passfile.write(passphrase)
276
passfile.flush()
277
proc = subprocess.Popen([self.gpg, '--decrypt',
278
'--passphrase-file',
279
passfile.name]
280
+ self.gnupgargs,
281
stdin=subprocess.PIPE,
282
stdout=subprocess.PIPE,
283
stderr=subprocess.PIPE)
284
decrypted_plaintext, err = proc.communicate(input=data)
285
if proc.returncode != 0:
286
raise PGPError(err)
211
287
return decrypted_plaintext
212
288
213
289
290
# Pretend that we have an Avahi module
291
class avahi:
292
"""This isn't so much a class as it is a module-like namespace."""
293
IF_UNSPEC = -1 # avahi-common/address.h
294
PROTO_UNSPEC = -1 # avahi-common/address.h
295
PROTO_INET = 0 # avahi-common/address.h
296
PROTO_INET6 = 1 # avahi-common/address.h
297
DBUS_NAME = "org.freedesktop.Avahi"
298
DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"
299
DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"
300
DBUS_PATH_SERVER = "/"
301
302
@staticmethod
303
def string_array_to_txt_array(t):
304
return dbus.Array((dbus.ByteArray(s.encode("utf-8"))
305
for s in t), signature="ay")
306
ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h
307
ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h
308
ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h
309
SERVER_INVALID = 0 # avahi-common/defs.h
310
SERVER_REGISTERING = 1 # avahi-common/defs.h
311
SERVER_RUNNING = 2 # avahi-common/defs.h
312
SERVER_COLLISION = 3 # avahi-common/defs.h
313
SERVER_FAILURE = 4 # avahi-common/defs.h
314
315
214
316
class AvahiError(Exception):
215
317
def __init__(self, value, *args, **kwargs):
216
318
self.value = value
217
super(AvahiError, self).__init__(value, *args, **kwargs)
218
def __unicode__(self):
219
return unicode(repr(self.value))
319
return super(AvahiError, self).__init__(value, *args,
320
**kwargs)
321
220
322
221
323
class AvahiServiceError(AvahiError):
222
324
pass
223
325
326
224
327
class AvahiGroupError(AvahiError):
225
328
pass
226
329
227
330
228
class AvahiService(object):
331
class AvahiService:
229
332
"""An Avahi (Zeroconf) service.
230
333
231
334
Attributes:
232
335
interface: integer; avahi.IF_UNSPEC or an interface index.
233
336
Used to optionally bind to the specified interface.
234
337
name: string; Example: 'Mandos'
235
338
type: string; Example: '_mandos._tcp'.
236
See <http://www.dns-sd.org/ServiceTypes.html>
339
See <https://www.iana.org/assignments/service-names-port-numbers>
237
340
port: integer; what port to announce
238
341
TXT: list of strings; TXT record for the service
239
342
domain: string; Domain to publish on, default to .local if empty.
245
348
server: D-Bus Server
246
349
bus: dbus.SystemBus()
247
350
"""
248
249
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
250
servicetype = None, port = None, TXT = None,
251
domain = "", host = "", max_renames = 32768,
252
protocol = avahi.PROTO_UNSPEC, bus = None):
351
352
def __init__(self,
353
interface=avahi.IF_UNSPEC,
354
name=None,
355
servicetype=None,
356
port=None,
357
TXT=None,
358
domain="",
359
host="",
360
max_renames=32768,
361
protocol=avahi.PROTO_UNSPEC,
362
bus=None):
253
363
self.interface = interface
254
364
self.name = name
255
365
self.type = servicetype
264
374
self.server = None
265
375
self.bus = bus
266
376
self.entry_group_state_changed_match = None
267
268
def rename(self):
377
378
def rename(self, remove=True):
269
379
"""Derived from the Avahi example code"""
270
380
if self.rename_count >= self.max_renames:
271
381
logger.critical("No suitable Zeroconf service name found"
272
382
" after %i retries, exiting.",
273
383
self.rename_count)
274
384
raise AvahiServiceError("Too many renames")
275
self.name = unicode(self.server
276
.GetAlternativeServiceName(self.name))
385
self.name = str(
386
self.server.GetAlternativeServiceName(self.name))
387
self.rename_count += 1
277
388
logger.info("Changing Zeroconf service name to %r ...",
278
389
self.name)
279
self.remove()
390
if remove:
391
self.remove()
280
392
try:
281
393
self.add()
282
394
except dbus.exceptions.DBusException as error:
283
logger.critical("D-Bus Exception", exc_info=error)
284
self.cleanup()
285
os._exit(1)
286
self.rename_count += 1
287
395
if (error.get_dbus_name()
396
== "org.freedesktop.Avahi.CollisionError"):
397
logger.info("Local Zeroconf service name collision.")
398
return self.rename(remove=False)
399
else:
400
logger.critical("D-Bus Exception", exc_info=error)
401
self.cleanup()
402
os._exit(1)
403
288
404
def remove(self):
289
405
"""Derived from the Avahi example code"""
290
406
if self.entry_group_state_changed_match is not None:
292
408
self.entry_group_state_changed_match = None
293
409
if self.group is not None:
294
410
self.group.Reset()
295
411
296
412
def add(self):
297
413
"""Derived from the Avahi example code"""
298
414
self.remove()
315
431
dbus.UInt16(self.port),
316
432
avahi.string_array_to_txt_array(self.TXT))
317
433
self.group.Commit()
318
434
319
435
def entry_group_state_changed(self, state, error):
320
436
"""Derived from the Avahi example code"""
321
437
logger.debug("Avahi entry group state change: %i", state)
322
438
323
439
if state == avahi.ENTRY_GROUP_ESTABLISHED:
324
440
logger.debug("Zeroconf service established.")
325
441
elif state == avahi.ENTRY_GROUP_COLLISION:
327
443
self.rename()
328
444
elif state == avahi.ENTRY_GROUP_FAILURE:
329
445
logger.critical("Avahi: Error in group state changed %s",
330
unicode(error))
331
raise AvahiGroupError("State changed: {0!s}"
332
.format(error))
333
446
str(error))
447
raise AvahiGroupError("State changed: {!s}".format(error))
448
334
449
def cleanup(self):
335
450
"""Derived from the Avahi example code"""
336
451
if self.group is not None:
341
456
pass
342
457
self.group = None
343
458
self.remove()
344
459
345
460
def server_state_changed(self, state, error=None):
346
461
"""Derived from the Avahi example code"""
347
462
logger.debug("Avahi server state change: %i", state)
348
bad_states = { avahi.SERVER_INVALID:
349
"Zeroconf server invalid",
350
avahi.SERVER_REGISTERING: None,
351
avahi.SERVER_COLLISION:
352
"Zeroconf server name collision",
353
avahi.SERVER_FAILURE:
354
"Zeroconf server failure" }
463
bad_states = {
464
avahi.SERVER_INVALID: "Zeroconf server invalid",
465
avahi.SERVER_REGISTERING: None,
466
avahi.SERVER_COLLISION: "Zeroconf server name collision",
467
avahi.SERVER_FAILURE: "Zeroconf server failure",
468
}
355
469
if state in bad_states:
356
470
if bad_states[state] is not None:
357
471
if error is None:
360
474
logger.error(bad_states[state] + ": %r", error)
361
475
self.cleanup()
362
476
elif state == avahi.SERVER_RUNNING:
363
self.add()
477
try:
478
self.add()
479
except dbus.exceptions.DBusException as error:
480
if (error.get_dbus_name()
481
== "org.freedesktop.Avahi.CollisionError"):
482
logger.info("Local Zeroconf service name"
483
" collision.")
484
return self.rename(remove=False)
485
else:
486
logger.critical("D-Bus Exception", exc_info=error)
487
self.cleanup()
488
os._exit(1)
364
489
else:
365
490
if error is None:
366
491
logger.debug("Unknown state: %r", state)
367
492
else:
368
493
logger.debug("Unknown state: %r: %r", state, error)
369
494
370
495
def activate(self):
371
496
"""Derived from the Avahi example code"""
372
497
if self.server is None:
376
501
follow_name_owner_changes=True),
377
502
avahi.DBUS_INTERFACE_SERVER)
378
503
self.server.connect_to_signal("StateChanged",
379
self.server_state_changed)
504
self.server_state_changed)
380
505
self.server_state_changed(self.server.GetState())
381
506
507
382
508
class AvahiServiceToSyslog(AvahiService):
383
def rename(self):
509
def rename(self, *args, **kwargs):
384
510
"""Add the new name to the syslog messages"""
385
ret = AvahiService.rename(self)
386
syslogger.setFormatter(logging.Formatter
387
('Mandos ({0}) [%(process)d]:'
388
' %(levelname)s: %(message)s'
389
.format(self.name)))
511
ret = super(AvahiServiceToSyslog, self).rename(*args, **kwargs)
512
syslogger.setFormatter(logging.Formatter(
513
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
514
.format(self.name)))
390
515
return ret
391
516
392
def timedelta_to_milliseconds(td):
393
"Convert a datetime.timedelta() to milliseconds"
394
return ((td.days * 24 * 60 * 60 * 1000)
395
+ (td.seconds * 1000)
396
+ (td.microseconds // 1000))
397
398
class Client(object):
517
518
# Pretend that we have a GnuTLS module
519
class gnutls:
520
"""This isn't so much a class as it is a module-like namespace."""
521
522
library = ctypes.util.find_library("gnutls")
523
if library is None:
524
library = ctypes.util.find_library("gnutls-deb0")
525
_library = ctypes.cdll.LoadLibrary(library)
526
del library
527
528
# Unless otherwise indicated, the constants and types below are
529
# all from the gnutls/gnutls.h C header file.
530
531
# Constants
532
E_SUCCESS = 0
533
E_INTERRUPTED = -52
534
E_AGAIN = -28
535
CRT_OPENPGP = 2
536
CRT_RAWPK = 3
537
CLIENT = 2
538
SHUT_RDWR = 0
539
CRD_CERTIFICATE = 1
540
E_NO_CERTIFICATE_FOUND = -49
541
X509_FMT_DER = 0
542
NO_TICKETS = 1<<10
543
ENABLE_RAWPK = 1<<18
544
CTYPE_PEERS = 3
545
KEYID_USE_SHA256 = 1 # gnutls/x509.h
546
OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
547
548
# Types
549
class session_int(ctypes.Structure):
550
_fields_ = []
551
session_t = ctypes.POINTER(session_int)
552
553
class certificate_credentials_st(ctypes.Structure):
554
_fields_ = []
555
certificate_credentials_t = ctypes.POINTER(
556
certificate_credentials_st)
557
certificate_type_t = ctypes.c_int
558
559
class datum_t(ctypes.Structure):
560
_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
561
('size', ctypes.c_uint)]
562
563
class openpgp_crt_int(ctypes.Structure):
564
_fields_ = []
565
openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
566
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
567
log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
568
credentials_type_t = ctypes.c_int
569
transport_ptr_t = ctypes.c_void_p
570
close_request_t = ctypes.c_int
571
572
# Exceptions
573
class Error(Exception):
574
def __init__(self, message=None, code=None, args=()):
575
# Default usage is by a message string, but if a return
576
# code is passed, convert it to a string with
577
# gnutls.strerror()
578
self.code = code
579
if message is None and code is not None:
580
message = gnutls.strerror(code)
581
return super(gnutls.Error, self).__init__(
582
message, *args)
583
584
class CertificateSecurityError(Error):
585
pass
586
587
# Classes
588
class Credentials:
589
def __init__(self):
590
self._c_object = gnutls.certificate_credentials_t()
591
gnutls.certificate_allocate_credentials(
592
ctypes.byref(self._c_object))
593
self.type = gnutls.CRD_CERTIFICATE
594
595
def __del__(self):
596
gnutls.certificate_free_credentials(self._c_object)
597
598
class ClientSession:
599
def __init__(self, socket, credentials=None):
600
self._c_object = gnutls.session_t()
601
gnutls_flags = gnutls.CLIENT
602
if gnutls.check_version(b"3.5.6"):
603
gnutls_flags |= gnutls.NO_TICKETS
604
if gnutls.has_rawpk:
605
gnutls_flags |= gnutls.ENABLE_RAWPK
606
gnutls.init(ctypes.byref(self._c_object), gnutls_flags)
607
del gnutls_flags
608
gnutls.set_default_priority(self._c_object)
609
gnutls.transport_set_ptr(self._c_object, socket.fileno())
610
gnutls.handshake_set_private_extensions(self._c_object,
611
True)
612
self.socket = socket
613
if credentials is None:
614
credentials = gnutls.Credentials()
615
gnutls.credentials_set(self._c_object, credentials.type,
616
ctypes.cast(credentials._c_object,
617
ctypes.c_void_p))
618
self.credentials = credentials
619
620
def __del__(self):
621
gnutls.deinit(self._c_object)
622
623
def handshake(self):
624
return gnutls.handshake(self._c_object)
625
626
def send(self, data):
627
data = bytes(data)
628
data_len = len(data)
629
while data_len > 0:
630
data_len -= gnutls.record_send(self._c_object,
631
data[-data_len:],
632
data_len)
633
634
def bye(self):
635
return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
636
637
# Error handling functions
638
def _error_code(result):
639
"""A function to raise exceptions on errors, suitable
640
for the 'restype' attribute on ctypes functions"""
641
if result >= 0:
642
return result
643
if result == gnutls.E_NO_CERTIFICATE_FOUND:
644
raise gnutls.CertificateSecurityError(code=result)
645
raise gnutls.Error(code=result)
646
647
def _retry_on_error(result, func, arguments):
648
"""A function to retry on some errors, suitable
649
for the 'errcheck' attribute on ctypes functions"""
650
while result < 0:
651
if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
652
return _error_code(result)
653
result = func(*arguments)
654
return result
655
656
# Unless otherwise indicated, the function declarations below are
657
# all from the gnutls/gnutls.h C header file.
658
659
# Functions
660
priority_set_direct = _library.gnutls_priority_set_direct
661
priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
662
ctypes.POINTER(ctypes.c_char_p)]
663
priority_set_direct.restype = _error_code
664
665
init = _library.gnutls_init
666
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
667
init.restype = _error_code
668
669
set_default_priority = _library.gnutls_set_default_priority
670
set_default_priority.argtypes = [session_t]
671
set_default_priority.restype = _error_code
672
673
record_send = _library.gnutls_record_send
674
record_send.argtypes = [session_t, ctypes.c_void_p,
675
ctypes.c_size_t]
676
record_send.restype = ctypes.c_ssize_t
677
record_send.errcheck = _retry_on_error
678
679
certificate_allocate_credentials = (
680
_library.gnutls_certificate_allocate_credentials)
681
certificate_allocate_credentials.argtypes = [
682
ctypes.POINTER(certificate_credentials_t)]
683
certificate_allocate_credentials.restype = _error_code
684
685
certificate_free_credentials = (
686
_library.gnutls_certificate_free_credentials)
687
certificate_free_credentials.argtypes = [
688
certificate_credentials_t]
689
certificate_free_credentials.restype = None
690
691
handshake_set_private_extensions = (
692
_library.gnutls_handshake_set_private_extensions)
693
handshake_set_private_extensions.argtypes = [session_t,
694
ctypes.c_int]
695
handshake_set_private_extensions.restype = None
696
697
credentials_set = _library.gnutls_credentials_set
698
credentials_set.argtypes = [session_t, credentials_type_t,
699
ctypes.c_void_p]
700
credentials_set.restype = _error_code
701
702
strerror = _library.gnutls_strerror
703
strerror.argtypes = [ctypes.c_int]
704
strerror.restype = ctypes.c_char_p
705
706
certificate_type_get = _library.gnutls_certificate_type_get
707
certificate_type_get.argtypes = [session_t]
708
certificate_type_get.restype = _error_code
709
710
certificate_get_peers = _library.gnutls_certificate_get_peers
711
certificate_get_peers.argtypes = [session_t,
712
ctypes.POINTER(ctypes.c_uint)]
713
certificate_get_peers.restype = ctypes.POINTER(datum_t)
714
715
global_set_log_level = _library.gnutls_global_set_log_level
716
global_set_log_level.argtypes = [ctypes.c_int]
717
global_set_log_level.restype = None
718
719
global_set_log_function = _library.gnutls_global_set_log_function
720
global_set_log_function.argtypes = [log_func]
721
global_set_log_function.restype = None
722
723
deinit = _library.gnutls_deinit
724
deinit.argtypes = [session_t]
725
deinit.restype = None
726
727
handshake = _library.gnutls_handshake
728
handshake.argtypes = [session_t]
729
handshake.restype = _error_code
730
handshake.errcheck = _retry_on_error
731
732
transport_set_ptr = _library.gnutls_transport_set_ptr
733
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
734
transport_set_ptr.restype = None
735
736
bye = _library.gnutls_bye
737
bye.argtypes = [session_t, close_request_t]
738
bye.restype = _error_code
739
bye.errcheck = _retry_on_error
740
741
check_version = _library.gnutls_check_version
742
check_version.argtypes = [ctypes.c_char_p]
743
check_version.restype = ctypes.c_char_p
744
745
_need_version = b"3.3.0"
746
if check_version(_need_version) is None:
747
raise self.Error("Needs GnuTLS {} or later"
748
.format(_need_version))
749
750
_tls_rawpk_version = b"3.6.6"
751
has_rawpk = bool(check_version(_tls_rawpk_version))
752
753
if has_rawpk:
754
# Types
755
class pubkey_st(ctypes.Structure):
756
_fields = []
757
pubkey_t = ctypes.POINTER(pubkey_st)
758
759
x509_crt_fmt_t = ctypes.c_int
760
761
# All the function declarations below are from gnutls/abstract.h
762
pubkey_init = _library.gnutls_pubkey_init
763
pubkey_init.argtypes = [ctypes.POINTER(pubkey_t)]
764
pubkey_init.restype = _error_code
765
766
pubkey_import = _library.gnutls_pubkey_import
767
pubkey_import.argtypes = [pubkey_t, ctypes.POINTER(datum_t),
768
x509_crt_fmt_t]
769
pubkey_import.restype = _error_code
770
771
pubkey_get_key_id = _library.gnutls_pubkey_get_key_id
772
pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,
773
ctypes.POINTER(ctypes.c_ubyte),
774
ctypes.POINTER(ctypes.c_size_t)]
775
pubkey_get_key_id.restype = _error_code
776
777
pubkey_deinit = _library.gnutls_pubkey_deinit
778
pubkey_deinit.argtypes = [pubkey_t]
779
pubkey_deinit.restype = None
780
else:
781
# All the function declarations below are from gnutls/openpgp.h
782
783
openpgp_crt_init = _library.gnutls_openpgp_crt_init
784
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
785
openpgp_crt_init.restype = _error_code
786
787
openpgp_crt_import = _library.gnutls_openpgp_crt_import
788
openpgp_crt_import.argtypes = [openpgp_crt_t,
789
ctypes.POINTER(datum_t),
790
openpgp_crt_fmt_t]
791
openpgp_crt_import.restype = _error_code
792
793
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
794
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
795
ctypes.POINTER(ctypes.c_uint)]
796
openpgp_crt_verify_self.restype = _error_code
797
798
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
799
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
800
openpgp_crt_deinit.restype = None
801
802
openpgp_crt_get_fingerprint = (
803
_library.gnutls_openpgp_crt_get_fingerprint)
804
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
805
ctypes.c_void_p,
806
ctypes.POINTER(
807
ctypes.c_size_t)]
808
openpgp_crt_get_fingerprint.restype = _error_code
809
810
if check_version(b"3.6.4"):
811
certificate_type_get2 = _library.gnutls_certificate_type_get2
812
certificate_type_get2.argtypes = [session_t, ctypes.c_int]
813
certificate_type_get2.restype = _error_code
814
815
# Remove non-public functions
816
del _error_code, _retry_on_error
817
818
819
def call_pipe(connection, # : multiprocessing.Connection
820
func, *args, **kwargs):
821
"""This function is meant to be called by multiprocessing.Process
822
823
This function runs func(*args, **kwargs), and writes the resulting
824
return value on the provided multiprocessing.Connection.
825
"""
826
connection.send(func(*args, **kwargs))
827
connection.close()
828
829
830
class Client:
399
831
"""A representation of a client host served by this server.
400
832
401
833
Attributes:
402
834
approved: bool(); 'None' if not yet approved/disapproved
403
835
approval_delay: datetime.timedelta(); Time to wait for approval
404
836
approval_duration: datetime.timedelta(); Duration of one approval
405
checker: subprocess.Popen(); a running checker process used
406
to see if the client lives.
407
'None' if no process is running.
408
checker_callback_tag: a gobject event source tag, or None
837
checker: multiprocessing.Process(); a running checker process used
838
to see if the client lives. 'None' if no process is
839
running.
840
checker_callback_tag: a GLib event source tag, or None
409
841
checker_command: string; External command which is run to check
410
842
if client lives. %() expansions are done at
411
843
runtime with vars(self) as dict, so that for
412
844
instance %(name)s can be used in the command.
413
checker_initiator_tag: a gobject event source tag, or None
845
checker_initiator_tag: a GLib event source tag, or None
414
846
created: datetime.datetime(); (UTC) object creation
415
847
client_structure: Object describing what attributes a client has
416
848
and is used for storing the client at exit
417
849
current_checker_command: string; current running checker_command
418
disable_initiator_tag: a gobject event source tag, or None
850
disable_initiator_tag: a GLib event source tag, or None
419
851
enabled: bool()
420
852
fingerprint: string (40 or 32 hexadecimal digits); used to
421
uniquely identify the client
853
uniquely identify an OpenPGP client
854
key_id: string (64 hexadecimal digits); used to uniquely identify
855
a client using raw public keys
422
856
host: string; available for use by the checker command
423
857
interval: datetime.timedelta(); How often to start a new checker
424
858
last_approval_request: datetime.datetime(); (UTC) or None
426
860
last_checker_status: integer between 0 and 255 reflecting exit
427
861
status of last checker. -1 reflects crashed
428
862
checker, -2 means no checker completed yet.
863
last_checker_signal: The signal which killed the last checker, if
864
last_checker_status is -1
429
865
last_enabled: datetime.datetime(); (UTC) or None
430
866
name: string; from the config file, used in log messages and
431
867
D-Bus identifiers
436
872
runtime_expansions: Allowed attributes for runtime expansion.
437
873
expires: datetime.datetime(); time (UTC) when a client will be
438
874
disabled, or None
875
server_settings: The server_settings dict from main()
439
876
"""
440
877
441
878
runtime_expansions = ("approval_delay", "approval_duration",
442
"created", "enabled", "fingerprint",
443
"host", "interval", "last_checked_ok",
879
"created", "enabled", "expires", "key_id",
880
"fingerprint", "host", "interval",
881
"last_approval_request", "last_checked_ok",
444
882
"last_enabled", "name", "timeout")
445
client_defaults = { "timeout": "5m",
446
"extended_timeout": "15m",
447
"interval": "2m",
448
"checker": "fping -q -- %%(host)s",
449
"host": "",
450
"approval_delay": "0s",
451
"approval_duration": "1s",
452
"approved_by_default": "True",
453
"enabled": "True",
454
}
455
456
def timeout_milliseconds(self):
457
"Return the 'timeout' attribute in milliseconds"
458
return timedelta_to_milliseconds(self.timeout)
459
460
def extended_timeout_milliseconds(self):
461
"Return the 'extended_timeout' attribute in milliseconds"
462
return timedelta_to_milliseconds(self.extended_timeout)
463
464
def interval_milliseconds(self):
465
"Return the 'interval' attribute in milliseconds"
466
return timedelta_to_milliseconds(self.interval)
467
468
def approval_delay_milliseconds(self):
469
return timedelta_to_milliseconds(self.approval_delay)
470
883
client_defaults = {
884
"timeout": "PT5M",
885
"extended_timeout": "PT15M",
886
"interval": "PT2M",
887
"checker": "fping -q -- %%(host)s",
888
"host": "",
889
"approval_delay": "PT0S",
890
"approval_duration": "PT1S",
891
"approved_by_default": "True",
892
"enabled": "True",
893
}
894
471
895
@staticmethod
472
896
def config_parser(config):
473
897
"""Construct a new dict of client settings of this form:
480
904
for client_name in config.sections():
481
905
section = dict(config.items(client_name))
482
906
client = settings[client_name] = {}
483
907
484
908
client["host"] = section["host"]
485
909
# Reformat values from string types to Python types
486
910
client["approved_by_default"] = config.getboolean(
487
911
client_name, "approved_by_default")
488
912
client["enabled"] = config.getboolean(client_name,
489
913
"enabled")
490
914
915
# Uppercase and remove spaces from key_id and fingerprint
916
# for later comparison purposes with return value from the
917
# key_id() and fingerprint() functions
918
client["key_id"] = (section.get("key_id", "").upper()
919
.replace(" ", ""))
491
920
client["fingerprint"] = (section["fingerprint"].upper()
492
921
.replace(" ", ""))
493
922
if "secret" in section:
494
client["secret"] = section["secret"].decode("base64")
923
client["secret"] = codecs.decode(section["secret"]
924
.encode("utf-8"),
925
"base64")
495
926
elif "secfile" in section:
496
927
with open(os.path.expanduser(os.path.expandvars
497
928
(section["secfile"])),
498
929
"rb") as secfile:
499
930
client["secret"] = secfile.read()
500
931
else:
501
raise TypeError("No secret or secfile for section {0}"
932
raise TypeError("No secret or secfile for section {}"
502
933
.format(section))
503
934
client["timeout"] = string_to_delta(section["timeout"])
504
935
client["extended_timeout"] = string_to_delta(
512
943
client["last_approval_request"] = None
513
944
client["last_checked_ok"] = None
514
945
client["last_checker_status"] = -2
515
946
516
947
return settings
517
518
def __init__(self, settings, name = None):
948
949
def __init__(self, settings, name=None, server_settings=None):
519
950
self.name = name
951
if server_settings is None:
952
server_settings = {}
953
self.server_settings = server_settings
520
954
# adding all client settings
521
for setting, value in settings.iteritems():
955
for setting, value in settings.items():
522
956
setattr(self, setting, value)
523
957
524
958
if self.enabled:
525
959
if not hasattr(self, "last_enabled"):
526
960
self.last_enabled = datetime.datetime.utcnow()
530
964
else:
531
965
self.last_enabled = None
532
966
self.expires = None
533
967
534
968
logger.debug("Creating client %r", self.name)
535
# Uppercase and remove spaces from fingerprint for later
536
# comparison purposes with return value from the fingerprint()
537
# function
969
logger.debug(" Key ID: %s", self.key_id)
538
970
logger.debug(" Fingerprint: %s", self.fingerprint)
539
971
self.created = settings.get("created",
540
972
datetime.datetime.utcnow())
541
973
542
974
# attributes specific for this server instance
543
975
self.checker = None
544
976
self.checker_initiator_tag = None
547
979
self.current_checker_command = None
548
980
self.approved = None
549
981
self.approvals_pending = 0
550
self.changedstate = (multiprocessing_manager
551
.Condition(multiprocessing_manager
552
.Lock()))
553
self.client_structure = [attr for attr in
554
self.__dict__.iterkeys()
982
self.changedstate = multiprocessing_manager.Condition(
983
multiprocessing_manager.Lock())
984
self.client_structure = [attr
985
for attr in self.__dict__.keys()
555
986
if not attr.startswith("_")]
556
987
self.client_structure.append("client_structure")
557
558
for name, t in inspect.getmembers(type(self),
559
lambda obj:
560
isinstance(obj,
561
property)):
988
989
for name, t in inspect.getmembers(
990
type(self), lambda obj: isinstance(obj, property)):
562
991
if not name.startswith("_"):
563
992
self.client_structure.append(name)
564
993
565
994
# Send notice to process children that client state has changed
566
995
def send_changedstate(self):
567
996
with self.changedstate:
568
997
self.changedstate.notify_all()
569
998
570
999
def enable(self):
571
1000
"""Start this client's checker and timeout hooks"""
572
1001
if getattr(self, "enabled", False):
573
1002
# Already enabled
574
1003
return
575
self.send_changedstate()
576
1004
self.expires = datetime.datetime.utcnow() + self.timeout
577
1005
self.enabled = True
578
1006
self.last_enabled = datetime.datetime.utcnow()
579
1007
self.init_checker()
580
1008
self.send_changedstate()
1009
581
1010
def disable(self, quiet=True):
582
1011
"""Disable this client."""
583
1012
if not getattr(self, "enabled", False):
584
1013
return False
585
1014
if not quiet:
586
self.send_changedstate()
587
if not quiet:
588
1015
logger.info("Disabling client %s", self.name)
589
if getattr(self, "disable_initiator_tag", False):
590
gobject.source_remove(self.disable_initiator_tag)
1016
if getattr(self, "disable_initiator_tag", None) is not None:
1017
GLib.source_remove(self.disable_initiator_tag)
591
1018
self.disable_initiator_tag = None
592
1019
self.expires = None
593
if getattr(self, "checker_initiator_tag", False):
594
gobject.source_remove(self.checker_initiator_tag)
1020
if getattr(self, "checker_initiator_tag", None) is not None:
1021
GLib.source_remove(self.checker_initiator_tag)
595
1022
self.checker_initiator_tag = None
596
1023
self.stop_checker()
597
1024
self.enabled = False
598
# Do not run this again if called by a gobject.timeout_add
1025
if not quiet:
1026
self.send_changedstate()
1027
# Do not run this again if called by a GLib.timeout_add
599
1028
return False
600
1029
601
1030
def __del__(self):
602
1031
self.disable()
603
1032
604
1033
def init_checker(self):
605
1034
# Schedule a new checker to be started an 'interval' from now,
606
1035
# and every interval from then on.
607
self.checker_initiator_tag = (gobject.timeout_add
608
(self.interval_milliseconds(),
609
self.start_checker))
1036
if self.checker_initiator_tag is not None:
1037
GLib.source_remove(self.checker_initiator_tag)
1038
self.checker_initiator_tag = GLib.timeout_add(
1039
random.randrange(int(self.interval.total_seconds() * 1000
1040
+ 1)),
1041
self.start_checker)
610
1042
# Schedule a disable() when 'timeout' has passed
611
self.disable_initiator_tag = (gobject.timeout_add
612
(self.timeout_milliseconds(),
613
self.disable))
1043
if self.disable_initiator_tag is not None:
1044
GLib.source_remove(self.disable_initiator_tag)
1045
self.disable_initiator_tag = GLib.timeout_add(
1046
int(self.timeout.total_seconds() * 1000), self.disable)
614
1047
# Also start a new checker *right now*.
615
1048
self.start_checker()
616
617
def checker_callback(self, pid, condition, command):
1049
1050
def checker_callback(self, source, condition, connection,
1051
command):
618
1052
"""The checker has completed, so take appropriate actions."""
1053
# Read return code from connection (see call_pipe)
1054
returncode = connection.recv()
1055
connection.close()
1056
if self.checker is not None:
1057
self.checker.join()
619
1058
self.checker_callback_tag = None
620
1059
self.checker = None
621
if os.WIFEXITED(condition):
622
self.last_checker_status = os.WEXITSTATUS(condition)
1060
1061
if returncode >= 0:
1062
self.last_checker_status = returncode
1063
self.last_checker_signal = None
623
1064
if self.last_checker_status == 0:
624
1065
logger.info("Checker for %(name)s succeeded",
625
1066
vars(self))
626
1067
self.checked_ok()
627
1068
else:
628
logger.info("Checker for %(name)s failed",
629
vars(self))
1069
logger.info("Checker for %(name)s failed", vars(self))
630
1070
else:
631
1071
self.last_checker_status = -1
1072
self.last_checker_signal = -returncode
632
1073
logger.warning("Checker for %(name)s crashed?",
633
1074
vars(self))
634
1075
return False
1076
635
1077
def checked_ok(self):
636
1078
"""Assert that the client has been seen, alive and well."""
637
1079
self.last_checked_ok = datetime.datetime.utcnow()
638
1080
self.last_checker_status = 0
1081
self.last_checker_signal = None
639
1082
self.bump_timeout()
640
1083
641
1084
def bump_timeout(self, timeout=None):
642
1085
"""Bump up the timeout for this client."""
643
1086
if timeout is None:
644
1087
timeout = self.timeout
645
1088
if self.disable_initiator_tag is not None:
646
gobject.source_remove(self.disable_initiator_tag)
1089
GLib.source_remove(self.disable_initiator_tag)
1090
self.disable_initiator_tag = None
647
1091
if getattr(self, "enabled", False):
648
self.disable_initiator_tag = (gobject.timeout_add
649
(timedelta_to_milliseconds
650
(timeout), self.disable))
1092
self.disable_initiator_tag = GLib.timeout_add(
1093
int(timeout.total_seconds() * 1000), self.disable)
651
1094
self.expires = datetime.datetime.utcnow() + timeout
652
1095
653
1096
def need_approval(self):
654
1097
self.last_approval_request = datetime.datetime.utcnow()
655
1098
656
1099
def start_checker(self):
657
1100
"""Start a new checker subprocess if one is not running.
658
1101
659
1102
If a checker already exists, leave it running and do
660
1103
nothing."""
661
1104
# The reason for not killing a running checker is that if we
666
1109
# checkers alone, the checker would have to take more time
667
1110
# than 'timeout' for the client to be disabled, which is as it
668
1111
# should be.
669
670
# If a checker exists, make sure it is not a zombie
671
try:
672
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
673
except (AttributeError, OSError) as error:
674
if (isinstance(error, OSError)
675
and error.errno != errno.ECHILD):
676
raise error
677
else:
678
if pid:
679
logger.warning("Checker was a zombie")
680
gobject.source_remove(self.checker_callback_tag)
681
self.checker_callback(pid, status,
682
self.current_checker_command)
1112
1113
if self.checker is not None and not self.checker.is_alive():
1114
logger.warning("Checker was not alive; joining")
1115
self.checker.join()
1116
self.checker = None
683
1117
# Start a new checker if needed
684
1118
if self.checker is None:
1119
# Escape attributes for the shell
1120
escaped_attrs = {
1121
attr: re.escape(str(getattr(self, attr)))
1122
for attr in self.runtime_expansions}
685
1123
try:
686
# In case checker_command has exactly one % operator
687
command = self.checker_command % self.host
688
except TypeError:
689
# Escape attributes for the shell
690
escaped_attrs = dict(
691
(attr,
692
re.escape(unicode(str(getattr(self, attr, "")),
693
errors=
694
'replace')))
695
for attr in
696
self.runtime_expansions)
697
698
try:
699
command = self.checker_command % escaped_attrs
700
except TypeError as error:
701
logger.error('Could not format string "%s"',
702
self.checker_command, exc_info=error)
703
return True # Try again later
1124
command = self.checker_command % escaped_attrs
1125
except TypeError as error:
1126
logger.error('Could not format string "%s"',
1127
self.checker_command,
1128
exc_info=error)
1129
return True # Try again later
704
1130
self.current_checker_command = command
705
try:
706
logger.info("Starting checker %r for %s",
707
command, self.name)
708
# We don't need to redirect stdout and stderr, since
709
# in normal mode, that is already done by daemon(),
710
# and in debug mode we don't want to. (Stdin is
711
# always replaced by /dev/null.)
712
self.checker = subprocess.Popen(command,
713
close_fds=True,
714
shell=True, cwd="/")
715
self.checker_callback_tag = (gobject.child_watch_add
716
(self.checker.pid,
717
self.checker_callback,
718
data=command))
719
# The checker may have completed before the gobject
720
# watch was added. Check for this.
721
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
722
if pid:
723
gobject.source_remove(self.checker_callback_tag)
724
self.checker_callback(pid, status, command)
725
except OSError as error:
726
logger.error("Failed to start subprocess",
727
exc_info=error)
728
# Re-run this periodically if run by gobject.timeout_add
1131
logger.info("Starting checker %r for %s", command,
1132
self.name)
1133
# We don't need to redirect stdout and stderr, since
1134
# in normal mode, that is already done by daemon(),
1135
# and in debug mode we don't want to. (Stdin is
1136
# always replaced by /dev/null.)
1137
# The exception is when not debugging but nevertheless
1138
# running in the foreground; use the previously
1139
# created wnull.
1140
popen_args = {"close_fds": True,
1141
"shell": True,
1142
"cwd": "/"}
1143
if (not self.server_settings["debug"]
1144
and self.server_settings["foreground"]):
1145
popen_args.update({"stdout": wnull,
1146
"stderr": wnull})
1147
pipe = multiprocessing.Pipe(duplex=False)
1148
self.checker = multiprocessing.Process(
1149
target=call_pipe,
1150
args=(pipe[1], subprocess.call, command),
1151
kwargs=popen_args)
1152
self.checker.start()
1153
self.checker_callback_tag = GLib.io_add_watch(
1154
GLib.IOChannel.unix_new(pipe[0].fileno()),
1155
GLib.PRIORITY_DEFAULT, GLib.IO_IN,
1156
self.checker_callback, pipe[0], command)
1157
# Re-run this periodically if run by GLib.timeout_add
729
1158
return True
730
1159
731
1160
def stop_checker(self):
732
1161
"""Force the checker process, if any, to stop."""
733
1162
if self.checker_callback_tag:
734
gobject.source_remove(self.checker_callback_tag)
1163
GLib.source_remove(self.checker_callback_tag)
735
1164
self.checker_callback_tag = None
736
1165
if getattr(self, "checker", None) is None:
737
1166
return
738
1167
logger.debug("Stopping checker for %(name)s", vars(self))
739
try:
740
self.checker.terminate()
741
#time.sleep(0.5)
742
#if self.checker.poll() is None:
743
# self.checker.kill()
744
except OSError as error:
745
if error.errno != errno.ESRCH: # No such process
746
raise
1168
self.checker.terminate()
747
1169
self.checker = None
748
1170
749
1171
750
def dbus_service_property(dbus_interface, signature="v",
751
access="readwrite", byte_arrays=False):
1172
def dbus_service_property(dbus_interface,
1173
signature="v",
1174
access="readwrite",
1175
byte_arrays=False):
752
1176
"""Decorators for marking methods of a DBusObjectWithProperties to
753
1177
become properties on the D-Bus.
754
1178
755
1179
The decorated method will be called with no arguments by "Get"
756
1180
and with one argument by "Set".
757
1181
758
1182
The parameters, where they are supported, are the same as
759
1183
dbus.service.method, except there is only "signature", since the
760
1184
type from Get() and the type sent to Set() is the same.
763
1187
# "Set" method, so we fail early here:
764
1188
if byte_arrays and signature != "ay":
765
1189
raise ValueError("Byte arrays not supported for non-'ay'"
766
" signature {0!r}".format(signature))
1190
" signature {!r}".format(signature))
1191
767
1192
def decorator(func):
768
1193
func._dbus_is_property = True
769
1194
func._dbus_interface = dbus_interface
772
1197
func._dbus_name = func.__name__
773
1198
if func._dbus_name.endswith("_dbus_property"):
774
1199
func._dbus_name = func._dbus_name[:-14]
775
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
1200
func._dbus_get_args_options = {'byte_arrays': byte_arrays}
776
1201
return func
1202
777
1203
return decorator
778
1204
779
1205
780
1206
def dbus_interface_annotations(dbus_interface):
781
1207
"""Decorator for marking functions returning interface annotations
782
1208
783
1209
Usage:
784
1210
785
1211
@dbus_interface_annotations("org.example.Interface")
786
1212
def _foo(self): # Function name does not matter
787
1213
return {"org.freedesktop.DBus.Deprecated": "true",
788
1214
"org.freedesktop.DBus.Property.EmitsChangedSignal":
789
1215
"false"}
790
1216
"""
1217
791
1218
def decorator(func):
792
1219
func._dbus_is_interface = True
793
1220
func._dbus_interface = dbus_interface
794
1221
func._dbus_name = dbus_interface
795
1222
return func
1223
796
1224
return decorator
797
1225
798
1226
799
1227
def dbus_annotations(annotations):
800
1228
"""Decorator to annotate D-Bus methods, signals or properties
801
1229
Usage:
802
1230
1231
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
1232
"org.freedesktop.DBus.Property."
1233
"EmitsChangedSignal": "false"})
803
1234
@dbus_service_property("org.example.Interface", signature="b",
804
1235
access="r")
805
@dbus_annotations({{"org.freedesktop.DBus.Deprecated": "true",
806
"org.freedesktop.DBus.Property."
807
"EmitsChangedSignal": "false"})
808
1236
def Property_dbus_property(self):
809
1237
return dbus.Boolean(False)
1238
1239
See also the DBusObjectWithAnnotations class.
810
1240
"""
1241
811
1242
def decorator(func):
812
1243
func._dbus_annotations = annotations
813
1244
return func
1245
814
1246
return decorator
815
1247
816
1248
817
1249
class DBusPropertyException(dbus.exceptions.DBusException):
818
1250
"""A base class for D-Bus property-related exceptions
819
1251
"""
820
def __unicode__(self):
821
return unicode(str(self))
1252
pass
822
1253
823
1254
824
1255
class DBusPropertyAccessException(DBusPropertyException):
833
1264
pass
834
1265
835
1266
836
class DBusObjectWithProperties(dbus.service.Object):
837
"""A D-Bus object with properties.
838
839
Classes inheriting from this can use the dbus_service_property
840
decorator to expose methods as D-Bus properties. It exposes the
841
standard Get(), Set(), and GetAll() methods on the D-Bus.
1267
class DBusObjectWithAnnotations(dbus.service.Object):
1268
"""A D-Bus object with annotations.
1269
1270
Classes inheriting from this can use the dbus_annotations
1271
decorator to add annotations to methods or signals.
842
1272
"""
843
1273
844
1274
@staticmethod
845
1275
def _is_dbus_thing(thing):
846
1276
"""Returns a function testing if an attribute is a D-Bus thing
847
1277
848
1278
If called like _is_dbus_thing("method") it returns a function
849
1279
suitable for use as predicate to inspect.getmembers().
850
1280
"""
851
return lambda obj: getattr(obj, "_dbus_is_{0}".format(thing),
1281
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
852
1282
False)
853
1283
854
1284
def _get_all_dbus_things(self, thing):
855
1285
"""Returns a generator of (name, attribute) pairs
856
1286
"""
857
return ((getattr(athing.__get__(self), "_dbus_name",
858
name),
1287
return ((getattr(athing.__get__(self), "_dbus_name", name),
859
1288
athing.__get__(self))
860
1289
for cls in self.__class__.__mro__
861
1290
for name, athing in
862
inspect.getmembers(cls,
863
self._is_dbus_thing(thing)))
864
1291
inspect.getmembers(cls, self._is_dbus_thing(thing)))
1292
1293
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1294
out_signature="s",
1295
path_keyword='object_path',
1296
connection_keyword='connection')
1297
def Introspect(self, object_path, connection):
1298
"""Overloading of standard D-Bus method.
1299
1300
Inserts annotation tags on methods and signals.
1301
"""
1302
xmlstring = dbus.service.Object.Introspect(self, object_path,
1303
connection)
1304
try:
1305
document = xml.dom.minidom.parseString(xmlstring)
1306
1307
for if_tag in document.getElementsByTagName("interface"):
1308
# Add annotation tags
1309
for typ in ("method", "signal"):
1310
for tag in if_tag.getElementsByTagName(typ):
1311
annots = dict()
1312
for name, prop in (self.
1313
_get_all_dbus_things(typ)):
1314
if (name == tag.getAttribute("name")
1315
and prop._dbus_interface
1316
== if_tag.getAttribute("name")):
1317
annots.update(getattr(
1318
prop, "_dbus_annotations", {}))
1319
for name, value in annots.items():
1320
ann_tag = document.createElement(
1321
"annotation")
1322
ann_tag.setAttribute("name", name)
1323
ann_tag.setAttribute("value", value)
1324
tag.appendChild(ann_tag)
1325
# Add interface annotation tags
1326
for annotation, value in dict(
1327
itertools.chain.from_iterable(
1328
annotations().items()
1329
for name, annotations
1330
in self._get_all_dbus_things("interface")
1331
if name == if_tag.getAttribute("name")
1332
)).items():
1333
ann_tag = document.createElement("annotation")
1334
ann_tag.setAttribute("name", annotation)
1335
ann_tag.setAttribute("value", value)
1336
if_tag.appendChild(ann_tag)
1337
# Fix argument name for the Introspect method itself
1338
if (if_tag.getAttribute("name")
1339
== dbus.INTROSPECTABLE_IFACE):
1340
for cn in if_tag.getElementsByTagName("method"):
1341
if cn.getAttribute("name") == "Introspect":
1342
for arg in cn.getElementsByTagName("arg"):
1343
if (arg.getAttribute("direction")
1344
== "out"):
1345
arg.setAttribute("name",
1346
"xml_data")
1347
xmlstring = document.toxml("utf-8")
1348
document.unlink()
1349
except (AttributeError, xml.dom.DOMException,
1350
xml.parsers.expat.ExpatError) as error:
1351
logger.error("Failed to override Introspection method",
1352
exc_info=error)
1353
return xmlstring
1354
1355
1356
class DBusObjectWithProperties(DBusObjectWithAnnotations):
1357
"""A D-Bus object with properties.
1358
1359
Classes inheriting from this can use the dbus_service_property
1360
decorator to expose methods as D-Bus properties. It exposes the
1361
standard Get(), Set(), and GetAll() methods on the D-Bus.
1362
"""
1363
865
1364
def _get_dbus_property(self, interface_name, property_name):
866
1365
"""Returns a bound method if one exists which is a D-Bus
867
1366
property with the specified name and interface.
868
1367
"""
869
for cls in self.__class__.__mro__:
870
for name, value in (inspect.getmembers
871
(cls,
872
self._is_dbus_thing("property"))):
1368
for cls in self.__class__.__mro__:
1369
for name, value in inspect.getmembers(
1370
cls, self._is_dbus_thing("property")):
873
1371
if (value._dbus_name == property_name
874
1372
and value._dbus_interface == interface_name):
875
1373
return value.__get__(self)
876
1374
877
1375
# No such property
878
raise DBusPropertyNotFound(self.dbus_object_path + ":"
879
+ interface_name + "."
880
+ property_name)
881
882
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
1376
raise DBusPropertyNotFound("{}:{}.{}".format(
1377
self.dbus_object_path, interface_name, property_name))
1378
1379
@classmethod
1380
def _get_all_interface_names(cls):
1381
"""Get a sequence of all interfaces supported by an object"""
1382
return (name for name in set(getattr(getattr(x, attr),
1383
"_dbus_interface", None)
1384
for x in (inspect.getmro(cls))
1385
for attr in dir(x))
1386
if name is not None)
1387
1388
@dbus.service.method(dbus.PROPERTIES_IFACE,
1389
in_signature="ss",
883
1390
out_signature="v")
884
1391
def Get(self, interface_name, property_name):
885
1392
"""Standard D-Bus property Get() method, see D-Bus standard.
891
1398
if not hasattr(value, "variant_level"):
892
1399
return value
893
1400
return type(value)(value, variant_level=value.variant_level+1)
894
1401
895
1402
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
896
1403
def Set(self, interface_name, property_name, value):
897
1404
"""Standard D-Bus property Set() method, see D-Bus standard.
903
1410
# The byte_arrays option is not supported yet on
904
1411
# signatures other than "ay".
905
1412
if prop._dbus_signature != "ay":
906
raise ValueError
907
value = dbus.ByteArray(b''.join(chr(byte)
908
for byte in value))
1413
raise ValueError("Byte arrays not supported for non-"
1414
"'ay' signature {!r}"
1415
.format(prop._dbus_signature))
1416
value = dbus.ByteArray(bytes(value))
909
1417
prop(value)
910
911
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
1418
1419
@dbus.service.method(dbus.PROPERTIES_IFACE,
1420
in_signature="s",
912
1421
out_signature="a{sv}")
913
1422
def GetAll(self, interface_name):
914
1423
"""Standard D-Bus property GetAll() method, see D-Bus
915
1424
standard.
916
1425
917
1426
Note: Will not include properties with access="write".
918
1427
"""
919
1428
properties = {}
929
1438
if not hasattr(value, "variant_level"):
930
1439
properties[name] = value
931
1440
continue
932
properties[name] = type(value)(value, variant_level=
933
value.variant_level+1)
1441
properties[name] = type(value)(
1442
value, variant_level=value.variant_level + 1)
934
1443
return dbus.Dictionary(properties, signature="sv")
935
1444
1445
@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
1446
def PropertiesChanged(self, interface_name, changed_properties,
1447
invalidated_properties):
1448
"""Standard D-Bus PropertiesChanged() signal, see D-Bus
1449
standard.
1450
"""
1451
pass
1452
936
1453
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
937
1454
out_signature="s",
938
1455
path_keyword='object_path',
939
1456
connection_keyword='connection')
940
1457
def Introspect(self, object_path, connection):
941
1458
"""Overloading of standard D-Bus method.
942
1459
943
1460
Inserts property tags and interface annotation tags.
944
1461
"""
945
xmlstring = dbus.service.Object.Introspect(self, object_path,
946
connection)
1462
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1463
object_path,
1464
connection)
947
1465
try:
948
1466
document = xml.dom.minidom.parseString(xmlstring)
1467
949
1468
def make_tag(document, name, prop):
950
1469
e = document.createElement("property")
951
1470
e.setAttribute("name", name)
952
1471
e.setAttribute("type", prop._dbus_signature)
953
1472
e.setAttribute("access", prop._dbus_access)
954
1473
return e
1474
955
1475
for if_tag in document.getElementsByTagName("interface"):
956
1476
# Add property tags
957
1477
for tag in (make_tag(document, name, prop)
960
1480
if prop._dbus_interface
961
1481
== if_tag.getAttribute("name")):
962
1482
if_tag.appendChild(tag)
963
# Add annotation tags
964
for typ in ("method", "signal", "property"):
965
for tag in if_tag.getElementsByTagName(typ):
966
annots = dict()
967
for name, prop in (self.
968
_get_all_dbus_things(typ)):
969
if (name == tag.getAttribute("name")
970
and prop._dbus_interface
971
== if_tag.getAttribute("name")):
972
annots.update(getattr
973
(prop,
974
"_dbus_annotations",
975
{}))
976
for name, value in annots.iteritems():
977
ann_tag = document.createElement(
978
"annotation")
979
ann_tag.setAttribute("name", name)
980
ann_tag.setAttribute("value", value)
981
tag.appendChild(ann_tag)
982
# Add interface annotation tags
983
for annotation, value in dict(
984
itertools.chain.from_iterable(
985
annotations().iteritems()
986
for name, annotations in
987
self._get_all_dbus_things("interface")
988
if name == if_tag.getAttribute("name")
989
)).iteritems():
990
ann_tag = document.createElement("annotation")
991
ann_tag.setAttribute("name", annotation)
992
ann_tag.setAttribute("value", value)
993
if_tag.appendChild(ann_tag)
1483
# Add annotation tags for properties
1484
for tag in if_tag.getElementsByTagName("property"):
1485
annots = dict()
1486
for name, prop in self._get_all_dbus_things(
1487
"property"):
1488
if (name == tag.getAttribute("name")
1489
and prop._dbus_interface
1490
== if_tag.getAttribute("name")):
1491
annots.update(getattr(
1492
prop, "_dbus_annotations", {}))
1493
for name, value in annots.items():
1494
ann_tag = document.createElement(
1495
"annotation")
1496
ann_tag.setAttribute("name", name)
1497
ann_tag.setAttribute("value", value)
1498
tag.appendChild(ann_tag)
994
1499
# Add the names to the return values for the
995
1500
# "org.freedesktop.DBus.Properties" methods
996
1501
if (if_tag.getAttribute("name")
1015
1520
return xmlstring
1016
1521
1017
1522
1018
def datetime_to_dbus (dt, variant_level=0):
1523
try:
1524
dbus.OBJECT_MANAGER_IFACE
1525
except AttributeError:
1526
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1527
1528
1529
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1530
"""A D-Bus object with an ObjectManager.
1531
1532
Classes inheriting from this exposes the standard
1533
GetManagedObjects call and the InterfacesAdded and
1534
InterfacesRemoved signals on the standard
1535
"org.freedesktop.DBus.ObjectManager" interface.
1536
1537
Note: No signals are sent automatically; they must be sent
1538
manually.
1539
"""
1540
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1541
out_signature="a{oa{sa{sv}}}")
1542
def GetManagedObjects(self):
1543
"""This function must be overridden"""
1544
raise NotImplementedError()
1545
1546
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1547
signature="oa{sa{sv}}")
1548
def InterfacesAdded(self, object_path, interfaces_and_properties):
1549
pass
1550
1551
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1552
def InterfacesRemoved(self, object_path, interfaces):
1553
pass
1554
1555
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1556
out_signature="s",
1557
path_keyword='object_path',
1558
connection_keyword='connection')
1559
def Introspect(self, object_path, connection):
1560
"""Overloading of standard D-Bus method.
1561
1562
Override return argument name of GetManagedObjects to be
1563
"objpath_interfaces_and_properties"
1564
"""
1565
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1566
object_path,
1567
connection)
1568
try:
1569
document = xml.dom.minidom.parseString(xmlstring)
1570
1571
for if_tag in document.getElementsByTagName("interface"):
1572
# Fix argument name for the GetManagedObjects method
1573
if (if_tag.getAttribute("name")
1574
== dbus.OBJECT_MANAGER_IFACE):
1575
for cn in if_tag.getElementsByTagName("method"):
1576
if (cn.getAttribute("name")
1577
== "GetManagedObjects"):
1578
for arg in cn.getElementsByTagName("arg"):
1579
if (arg.getAttribute("direction")
1580
== "out"):
1581
arg.setAttribute(
1582
"name",
1583
"objpath_interfaces"
1584
"_and_properties")
1585
xmlstring = document.toxml("utf-8")
1586
document.unlink()
1587
except (AttributeError, xml.dom.DOMException,
1588
xml.parsers.expat.ExpatError) as error:
1589
logger.error("Failed to override Introspection method",
1590
exc_info=error)
1591
return xmlstring
1592
1593
1594
def datetime_to_dbus(dt, variant_level=0):
1019
1595
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1020
1596
if dt is None:
1021
return dbus.String("", variant_level = variant_level)
1022
return dbus.String(dt.isoformat(),
1023
variant_level=variant_level)
1597
return dbus.String("", variant_level=variant_level)
1598
return dbus.String(dt.isoformat(), variant_level=variant_level)
1024
1599
1025
1600
1026
1601
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1028
1603
dbus.service.Object, it will add alternate D-Bus attributes with
1029
1604
interface names according to the "alt_interface_names" mapping.
1030
1605
Usage:
1031
1032
@alternate_dbus_names({"org.example.Interface":
1033
"net.example.AlternateInterface"})
1606
1607
@alternate_dbus_interfaces({"org.example.Interface":
1608
"net.example.AlternateInterface"})
1034
1609
class SampleDBusObject(dbus.service.Object):
1035
1610
@dbus.service.method("org.example.Interface")
1036
1611
def SampleDBusMethod():
1037
1612
pass
1038
1613
1039
1614
The above "SampleDBusMethod" on "SampleDBusObject" will be
1040
1615
reachable via two interfaces: "org.example.Interface" and
1041
1616
"net.example.AlternateInterface", the latter of which will have
1042
1617
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1043
1618
"true", unless "deprecate" is passed with a False value.
1044
1619
1045
1620
This works for methods and signals, and also for D-Bus properties
1046
1621
(from DBusObjectWithProperties) and interfaces (from the
1047
1622
dbus_interface_annotations decorator).
1048
1623
"""
1624
1049
1625
def wrapper(cls):
1050
1626
for orig_interface_name, alt_interface_name in (
1051
alt_interface_names.iteritems()):
1627
alt_interface_names.items()):
1052
1628
attr = {}
1053
1629
interface_names = set()
1054
1630
# Go though all attributes of the class
1056
1632
# Ignore non-D-Bus attributes, and D-Bus attributes
1057
1633
# with the wrong interface name
1058
1634
if (not hasattr(attribute, "_dbus_interface")
1059
or not attribute._dbus_interface
1060
.startswith(orig_interface_name)):
1635
or not attribute._dbus_interface.startswith(
1636
orig_interface_name)):
1061
1637
continue
1062
1638
# Create an alternate D-Bus interface name based on
1063
1639
# the current name
1064
alt_interface = (attribute._dbus_interface
1065
.replace(orig_interface_name,
1066
alt_interface_name))
1640
alt_interface = attribute._dbus_interface.replace(
1641
orig_interface_name, alt_interface_name)
1067
1642
interface_names.add(alt_interface)
1068
1643
# Is this a D-Bus signal?
1069
1644
if getattr(attribute, "_dbus_is_signal", False):
1070
# Extract the original non-method function by
1071
# black magic
1072
nonmethod_func = (dict(
1645
# Extract the original non-method undecorated
1646
# function by black magic
1647
if sys.version_info.major == 2:
1648
nonmethod_func = (dict(
1073
1649
zip(attribute.func_code.co_freevars,
1074
attribute.__closure__))["func"]
1075
.cell_contents)
1650
attribute.__closure__))
1651
["func"].cell_contents)
1652
else:
1653
nonmethod_func = (dict(
1654
zip(attribute.__code__.co_freevars,
1655
attribute.__closure__))
1656
["func"].cell_contents)
1076
1657
# Create a new, but exactly alike, function
1077
1658
# object, and decorate it to be a new D-Bus signal
1078
1659
# with the alternate D-Bus interface name
1079
new_function = (dbus.service.signal
1080
(alt_interface,
1081
attribute._dbus_signature)
1082
(types.FunctionType(
1083
nonmethod_func.func_code,
1084
nonmethod_func.func_globals,
1085
nonmethod_func.func_name,
1086
nonmethod_func.func_defaults,
1087
nonmethod_func.func_closure)))
1660
new_function = copy_function(nonmethod_func)
1661
new_function = (dbus.service.signal(
1662
alt_interface,
1663
attribute._dbus_signature)(new_function))
1088
1664
# Copy annotations, if any
1089
1665
try:
1090
new_function._dbus_annotations = (
1091
dict(attribute._dbus_annotations))
1666
new_function._dbus_annotations = dict(
1667
attribute._dbus_annotations)
1092
1668
except AttributeError:
1093
1669
pass
1670
1094
1671
# Define a creator of a function to call both the
1095
1672
# original and alternate functions, so both the
1096
1673
# original and alternate signals gets sent when
1099
1676
"""This function is a scope container to pass
1100
1677
func1 and func2 to the "call_both" function
1101
1678
outside of its arguments"""
1679
1680
@functools.wraps(func2)
1102
1681
def call_both(*args, **kwargs):
1103
1682
"""This function will emit two D-Bus
1104
1683
signals by calling func1 and func2"""
1105
1684
func1(*args, **kwargs)
1106
1685
func2(*args, **kwargs)
1686
# Make wrapper function look like a D-Bus
1687
# signal
1688
for name, attr in inspect.getmembers(func2):
1689
if name.startswith("_dbus_"):
1690
setattr(call_both, name, attr)
1691
1107
1692
return call_both
1108
1693
# Create the "call_both" function and add it to
1109
1694
# the class
1114
1699
# object. Decorate it to be a new D-Bus method
1115
1700
# with the alternate D-Bus interface name. Add it
1116
1701
# to the class.
1117
attr[attrname] = (dbus.service.method
1118
(alt_interface,
1119
attribute._dbus_in_signature,
1120
attribute._dbus_out_signature)
1121
(types.FunctionType
1122
(attribute.func_code,
1123
attribute.func_globals,
1124
attribute.func_name,
1125
attribute.func_defaults,
1126
attribute.func_closure)))
1702
attr[attrname] = (
1703
dbus.service.method(
1704
alt_interface,
1705
attribute._dbus_in_signature,
1706
attribute._dbus_out_signature)
1707
(copy_function(attribute)))
1127
1708
# Copy annotations, if any
1128
1709
try:
1129
attr[attrname]._dbus_annotations = (
1130
dict(attribute._dbus_annotations))
1710
attr[attrname]._dbus_annotations = dict(
1711
attribute._dbus_annotations)
1131
1712
except AttributeError:
1132
1713
pass
1133
1714
# Is this a D-Bus property?
1136
1717
# object, and decorate it to be a new D-Bus
1137
1718
# property with the alternate D-Bus interface
1138
1719
# name. Add it to the class.
1139
attr[attrname] = (dbus_service_property
1140
(alt_interface,
1141
attribute._dbus_signature,
1142
attribute._dbus_access,
1143
attribute
1144
._dbus_get_args_options
1145
["byte_arrays"])
1146
(types.FunctionType
1147
(attribute.func_code,
1148
attribute.func_globals,
1149
attribute.func_name,
1150
attribute.func_defaults,
1151
attribute.func_closure)))
1720
attr[attrname] = (dbus_service_property(
1721
alt_interface, attribute._dbus_signature,
1722
attribute._dbus_access,
1723
attribute._dbus_get_args_options
1724
["byte_arrays"])
1725
(copy_function(attribute)))
1152
1726
# Copy annotations, if any
1153
1727
try:
1154
attr[attrname]._dbus_annotations = (
1155
dict(attribute._dbus_annotations))
1728
attr[attrname]._dbus_annotations = dict(
1729
attribute._dbus_annotations)
1156
1730
except AttributeError:
1157
1731
pass
1158
1732
# Is this a D-Bus interface?
1161
1735
# object. Decorate it to be a new D-Bus interface
1162
1736
# with the alternate D-Bus interface name. Add it
1163
1737
# to the class.
1164
attr[attrname] = (dbus_interface_annotations
1165
(alt_interface)
1166
(types.FunctionType
1167
(attribute.func_code,
1168
attribute.func_globals,
1169
attribute.func_name,
1170
attribute.func_defaults,
1171
attribute.func_closure)))
1738
attr[attrname] = (
1739
dbus_interface_annotations(alt_interface)
1740
(copy_function(attribute)))
1172
1741
if deprecate:
1173
1742
# Deprecate all alternate interfaces
1174
iname="_AlternateDBusNames_interface_annotation{0}"
1743
iname = "_AlternateDBusNames_interface_annotation{}"
1175
1744
for interface_name in interface_names:
1745
1176
1746
@dbus_interface_annotations(interface_name)
1177
1747
def func(self):
1178
return { "org.freedesktop.DBus.Deprecated":
1179
"true" }
1748
return {"org.freedesktop.DBus.Deprecated":
1749
"true"}
1180
1750
# Find an unused name
1181
1751
for aname in (iname.format(i)
1182
1752
for i in itertools.count()):
1186
1756
if interface_names:
1187
1757
# Replace the class with a new subclass of it with
1188
1758
# methods, signals, etc. as created above.
1189
cls = type(b"{0}Alternate".format(cls.__name__),
1190
(cls,), attr)
1759
if sys.version_info.major == 2:
1760
cls = type(b"{}Alternate".format(cls.__name__),
1761
(cls, ), attr)
1762
else:
1763
cls = type("{}Alternate".format(cls.__name__),
1764
(cls, ), attr)
1191
1765
return cls
1766
1192
1767
return wrapper
1193
1768
1194
1769
1195
1770
@alternate_dbus_interfaces({"se.recompile.Mandos":
1196
"se.bsnet.fukt.Mandos"})
1771
"se.bsnet.fukt.Mandos"})
1197
1772
class ClientDBus(Client, DBusObjectWithProperties):
1198
1773
"""A Client class using D-Bus
1199
1774
1200
1775
Attributes:
1201
1776
dbus_object_path: dbus.ObjectPath
1202
1777
bus: dbus.SystemBus()
1203
1778
"""
1204
1779
1205
1780
runtime_expansions = (Client.runtime_expansions
1206
+ ("dbus_object_path",))
1207
1781
+ ("dbus_object_path", ))
1782
1783
_interface = "se.recompile.Mandos.Client"
1784
1208
1785
# dbus.service.Object doesn't use super(), so we can't either.
1209
1210
def __init__(self, bus = None, *args, **kwargs):
1786
1787
def __init__(self, bus=None, *args, **kwargs):
1211
1788
self.bus = bus
1212
1789
Client.__init__(self, *args, **kwargs)
1213
1790
# Only now, when this client is initialized, can it show up on
1214
1791
# the D-Bus
1215
client_object_name = unicode(self.name).translate(
1792
client_object_name = str(self.name).translate(
1216
1793
{ord("."): ord("_"),
1217
1794
ord("-"): ord("_")})
1218
self.dbus_object_path = (dbus.ObjectPath
1219
("/clients/" + client_object_name))
1795
self.dbus_object_path = dbus.ObjectPath(
1796
"/clients/" + client_object_name)
1220
1797
DBusObjectWithProperties.__init__(self, self.bus,
1221
1798
self.dbus_object_path)
1222
1223
def notifychangeproperty(transform_func,
1224
dbus_name, type_func=lambda x: x,
1225
variant_level=1):
1799
1800
def notifychangeproperty(transform_func, dbus_name,
1801
type_func=lambda x: x,
1802
variant_level=1,
1803
invalidate_only=False,
1804
_interface=_interface):
1226
1805
""" Modify a variable so that it's a property which announces
1227
1806
its changes to DBus.
1228
1807
1229
1808
transform_fun: Function that takes a value and a variant_level
1230
1809
and transforms it to a D-Bus type.
1231
1810
dbus_name: D-Bus name of the variable
1233
1812
to the D-Bus. Default: no transform
1234
1813
variant_level: D-Bus variant level. Default: 1
1235
1814
"""
1236
attrname = "_{0}".format(dbus_name)
1815
attrname = "_{}".format(dbus_name)
1816
1237
1817
def setter(self, value):
1238
1818
if hasattr(self, "dbus_object_path"):
1239
1819
if (not hasattr(self, attrname) or
1240
1820
type_func(getattr(self, attrname, None))
1241
1821
!= type_func(value)):
1242
dbus_value = transform_func(type_func(value),
1243
variant_level
1244
=variant_level)
1245
self.PropertyChanged(dbus.String(dbus_name),
1246
dbus_value)
1822
if invalidate_only:
1823
self.PropertiesChanged(
1824
_interface, dbus.Dictionary(),
1825
dbus.Array((dbus_name, )))
1826
else:
1827
dbus_value = transform_func(
1828
type_func(value),
1829
variant_level=variant_level)
1830
self.PropertyChanged(dbus.String(dbus_name),
1831
dbus_value)
1832
self.PropertiesChanged(
1833
_interface,
1834
dbus.Dictionary({dbus.String(dbus_name):
1835
dbus_value}),
1836
dbus.Array())
1247
1837
setattr(self, attrname, value)
1248
1838
1249
1839
return property(lambda self: getattr(self, attrname), setter)
1250
1840
1251
1841
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1252
1842
approvals_pending = notifychangeproperty(dbus.Boolean,
1253
1843
"ApprovalPending",
1254
type_func = bool)
1844
type_func=bool)
1255
1845
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1256
1846
last_enabled = notifychangeproperty(datetime_to_dbus,
1257
1847
"LastEnabled")
1258
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1259
type_func = lambda checker:
1260
checker is not None)
1848
checker = notifychangeproperty(
1849
dbus.Boolean, "CheckerRunning",
1850
type_func=lambda checker: checker is not None)
1261
1851
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1262
1852
"LastCheckedOK")
1263
1853
last_checker_status = notifychangeproperty(dbus.Int16,
1266
1856
datetime_to_dbus, "LastApprovalRequest")
1267
1857
approved_by_default = notifychangeproperty(dbus.Boolean,
1268
1858
"ApprovedByDefault")
1269
approval_delay = notifychangeproperty(dbus.UInt64,
1270
"ApprovalDelay",
1271
type_func =
1272
timedelta_to_milliseconds)
1859
approval_delay = notifychangeproperty(
1860
dbus.UInt64, "ApprovalDelay",
1861
type_func=lambda td: td.total_seconds() * 1000)
1273
1862
approval_duration = notifychangeproperty(
1274
1863
dbus.UInt64, "ApprovalDuration",
1275
type_func = timedelta_to_milliseconds)
1864
type_func=lambda td: td.total_seconds() * 1000)
1276
1865
host = notifychangeproperty(dbus.String, "Host")
1277
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1278
type_func =
1279
timedelta_to_milliseconds)
1866
timeout = notifychangeproperty(
1867
dbus.UInt64, "Timeout",
1868
type_func=lambda td: td.total_seconds() * 1000)
1280
1869
extended_timeout = notifychangeproperty(
1281
1870
dbus.UInt64, "ExtendedTimeout",
1282
type_func = timedelta_to_milliseconds)
1283
interval = notifychangeproperty(dbus.UInt64,
1284
"Interval",
1285
type_func =
1286
timedelta_to_milliseconds)
1871
type_func=lambda td: td.total_seconds() * 1000)
1872
interval = notifychangeproperty(
1873
dbus.UInt64, "Interval",
1874
type_func=lambda td: td.total_seconds() * 1000)
1287
1875
checker_command = notifychangeproperty(dbus.String, "Checker")
1288
1876
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1877
invalidate_only=True)
1878
1289
1879
del notifychangeproperty
1290
1880
1291
1881
def __del__(self, *args, **kwargs):
1292
1882
try:
1293
1883
self.remove_from_connection()
1296
1886
if hasattr(DBusObjectWithProperties, "__del__"):
1297
1887
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1298
1888
Client.__del__(self, *args, **kwargs)
1299
1300
def checker_callback(self, pid, condition, command,
1301
*args, **kwargs):
1302
self.checker_callback_tag = None
1303
self.checker = None
1304
if os.WIFEXITED(condition):
1305
exitstatus = os.WEXITSTATUS(condition)
1889
1890
def checker_callback(self, source, condition,
1891
connection, command, *args, **kwargs):
1892
ret = Client.checker_callback(self, source, condition,
1893
connection, command, *args,
1894
**kwargs)
1895
exitstatus = self.last_checker_status
1896
if exitstatus >= 0:
1306
1897
# Emit D-Bus signal
1307
1898
self.CheckerCompleted(dbus.Int16(exitstatus),
1308
dbus.Int64(condition),
1899
# This is specific to GNU libC
1900
dbus.Int64(exitstatus << 8),
1309
1901
dbus.String(command))
1310
1902
else:
1311
1903
# Emit D-Bus signal
1312
1904
self.CheckerCompleted(dbus.Int16(-1),
1313
dbus.Int64(condition),
1905
dbus.Int64(
1906
# This is specific to GNU libC
1907
(exitstatus << 8)
1908
| self.last_checker_signal),
1314
1909
dbus.String(command))
1315
1316
return Client.checker_callback(self, pid, condition, command,
1317
*args, **kwargs)
1318
1910
return ret
1911
1319
1912
def start_checker(self, *args, **kwargs):
1320
old_checker = self.checker
1321
if self.checker is not None:
1322
old_checker_pid = self.checker.pid
1323
else:
1324
old_checker_pid = None
1913
old_checker_pid = getattr(self.checker, "pid", None)
1325
1914
r = Client.start_checker(self, *args, **kwargs)
1326
1915
# Only if new checker process was started
1327
1916
if (self.checker is not None
1329
1918
# Emit D-Bus signal
1330
1919
self.CheckerStarted(self.current_checker_command)
1331
1920
return r
1332
1921
1333
1922
def _reset_approved(self):
1334
1923
self.approved = None
1335
1924
return False
1336
1925
1337
1926
def approve(self, value=True):
1338
self.send_changedstate()
1339
1927
self.approved = value
1340
gobject.timeout_add(timedelta_to_milliseconds
1341
(self.approval_duration),
1342
self._reset_approved)
1343
1344
## D-Bus methods, signals & properties
1345
_interface = "se.recompile.Mandos.Client"
1346
1347
## Interfaces
1348
1349
@dbus_interface_annotations(_interface)
1350
def _foo(self):
1351
return { "org.freedesktop.DBus.Property.EmitsChangedSignal":
1352
"false"}
1353
1354
## Signals
1355
1928
GLib.timeout_add(int(self.approval_duration.total_seconds()
1929
* 1000), self._reset_approved)
1930
self.send_changedstate()
1931
1932
# D-Bus methods, signals & properties
1933
1934
# Interfaces
1935
1936
# Signals
1937
1356
1938
# CheckerCompleted - signal
1357
1939
@dbus.service.signal(_interface, signature="nxs")
1358
1940
def CheckerCompleted(self, exitcode, waitstatus, command):
1359
1941
"D-Bus signal"
1360
1942
pass
1361
1943
1362
1944
# CheckerStarted - signal
1363
1945
@dbus.service.signal(_interface, signature="s")
1364
1946
def CheckerStarted(self, command):
1365
1947
"D-Bus signal"
1366
1948
pass
1367
1949
1368
1950
# PropertyChanged - signal
1951
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1369
1952
@dbus.service.signal(_interface, signature="sv")
1370
1953
def PropertyChanged(self, property, value):
1371
1954
"D-Bus signal"
1372
1955
pass
1373
1956
1374
1957
# GotSecret - signal
1375
1958
@dbus.service.signal(_interface)
1376
1959
def GotSecret(self):
1379
1962
server to mandos-client
1380
1963
"""
1381
1964
pass
1382
1965
1383
1966
# Rejected - signal
1384
1967
@dbus.service.signal(_interface, signature="s")
1385
1968
def Rejected(self, reason):
1386
1969
"D-Bus signal"
1387
1970
pass
1388
1971
1389
1972
# NeedApproval - signal
1390
1973
@dbus.service.signal(_interface, signature="tb")
1391
1974
def NeedApproval(self, timeout, default):
1392
1975
"D-Bus signal"
1393
1976
return self.need_approval()
1394
1395
## Methods
1396
1977
1978
# Methods
1979
1397
1980
# Approve - method
1398
1981
@dbus.service.method(_interface, in_signature="b")
1399
1982
def Approve(self, value):
1400
1983
self.approve(value)
1401
1984
1402
1985
# CheckedOK - method
1403
1986
@dbus.service.method(_interface)
1404
1987
def CheckedOK(self):
1405
1988
self.checked_ok()
1406
1989
1407
1990
# Enable - method
1991
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1408
1992
@dbus.service.method(_interface)
1409
1993
def Enable(self):
1410
1994
"D-Bus method"
1411
1995
self.enable()
1412
1996
1413
1997
# StartChecker - method
1998
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1414
1999
@dbus.service.method(_interface)
1415
2000
def StartChecker(self):
1416
2001
"D-Bus method"
1417
2002
self.start_checker()
1418
2003
1419
2004
# Disable - method
2005
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1420
2006
@dbus.service.method(_interface)
1421
2007
def Disable(self):
1422
2008
"D-Bus method"
1423
2009
self.disable()
1424
2010
1425
2011
# StopChecker - method
2012
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1426
2013
@dbus.service.method(_interface)
1427
2014
def StopChecker(self):
1428
2015
self.stop_checker()
1429
1430
## Properties
1431
2016
2017
# Properties
2018
1432
2019
# ApprovalPending - property
1433
2020
@dbus_service_property(_interface, signature="b", access="read")
1434
2021
def ApprovalPending_dbus_property(self):
1435
2022
return dbus.Boolean(bool(self.approvals_pending))
1436
2023
1437
2024
# ApprovedByDefault - property
1438
@dbus_service_property(_interface, signature="b",
2025
@dbus_service_property(_interface,
2026
signature="b",
1439
2027
access="readwrite")
1440
2028
def ApprovedByDefault_dbus_property(self, value=None):
1441
2029
if value is None: # get
1442
2030
return dbus.Boolean(self.approved_by_default)
1443
2031
self.approved_by_default = bool(value)
1444
2032
1445
2033
# ApprovalDelay - property
1446
@dbus_service_property(_interface, signature="t",
2034
@dbus_service_property(_interface,
2035
signature="t",
1447
2036
access="readwrite")
1448
2037
def ApprovalDelay_dbus_property(self, value=None):
1449
2038
if value is None: # get
1450
return dbus.UInt64(self.approval_delay_milliseconds())
2039
return dbus.UInt64(self.approval_delay.total_seconds()
2040
* 1000)
1451
2041
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1452
2042
1453
2043
# ApprovalDuration - property
1454
@dbus_service_property(_interface, signature="t",
2044
@dbus_service_property(_interface,
2045
signature="t",
1455
2046
access="readwrite")
1456
2047
def ApprovalDuration_dbus_property(self, value=None):
1457
2048
if value is None: # get
1458
return dbus.UInt64(timedelta_to_milliseconds(
1459
self.approval_duration))
2049
return dbus.UInt64(self.approval_duration.total_seconds()
2050
* 1000)
1460
2051
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1461
2052
1462
2053
# Name - property
2054
@dbus_annotations(
2055
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1463
2056
@dbus_service_property(_interface, signature="s", access="read")
1464
2057
def Name_dbus_property(self):
1465
2058
return dbus.String(self.name)
1466
2059
2060
# KeyID - property
2061
@dbus_annotations(
2062
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2063
@dbus_service_property(_interface, signature="s", access="read")
2064
def KeyID_dbus_property(self):
2065
return dbus.String(self.key_id)
2066
1467
2067
# Fingerprint - property
2068
@dbus_annotations(
2069
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1468
2070
@dbus_service_property(_interface, signature="s", access="read")
1469
2071
def Fingerprint_dbus_property(self):
1470
2072
return dbus.String(self.fingerprint)
1471
2073
1472
2074
# Host - property
1473
@dbus_service_property(_interface, signature="s",
2075
@dbus_service_property(_interface,
2076
signature="s",
1474
2077
access="readwrite")
1475
2078
def Host_dbus_property(self, value=None):
1476
2079
if value is None: # get
1477
2080
return dbus.String(self.host)
1478
self.host = unicode(value)
1479
2081
self.host = str(value)
2082
1480
2083
# Created - property
2084
@dbus_annotations(
2085
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1481
2086
@dbus_service_property(_interface, signature="s", access="read")
1482
2087
def Created_dbus_property(self):
1483
2088
return datetime_to_dbus(self.created)
1484
2089
1485
2090
# LastEnabled - property
1486
2091
@dbus_service_property(_interface, signature="s", access="read")
1487
2092
def LastEnabled_dbus_property(self):
1488
2093
return datetime_to_dbus(self.last_enabled)
1489
2094
1490
2095
# Enabled - property
1491
@dbus_service_property(_interface, signature="b",
2096
@dbus_service_property(_interface,
2097
signature="b",
1492
2098
access="readwrite")
1493
2099
def Enabled_dbus_property(self, value=None):
1494
2100
if value is None: # get
1497
2103
self.enable()
1498
2104
else:
1499
2105
self.disable()
1500
2106
1501
2107
# LastCheckedOK - property
1502
@dbus_service_property(_interface, signature="s",
2108
@dbus_service_property(_interface,
2109
signature="s",
1503
2110
access="readwrite")
1504
2111
def LastCheckedOK_dbus_property(self, value=None):
1505
2112
if value is not None:
1506
2113
self.checked_ok()
1507
2114
return
1508
2115
return datetime_to_dbus(self.last_checked_ok)
1509
2116
1510
2117
# LastCheckerStatus - property
1511
@dbus_service_property(_interface, signature="n",
1512
access="read")
2118
@dbus_service_property(_interface, signature="n", access="read")
1513
2119
def LastCheckerStatus_dbus_property(self):
1514
2120
return dbus.Int16(self.last_checker_status)
1515
2121
1516
2122
# Expires - property
1517
2123
@dbus_service_property(_interface, signature="s", access="read")
1518
2124
def Expires_dbus_property(self):
1519
2125
return datetime_to_dbus(self.expires)
1520
2126
1521
2127
# LastApprovalRequest - property
1522
2128
@dbus_service_property(_interface, signature="s", access="read")
1523
2129
def LastApprovalRequest_dbus_property(self):
1524
2130
return datetime_to_dbus(self.last_approval_request)
1525
2131
1526
2132
# Timeout - property
1527
@dbus_service_property(_interface, signature="t",
2133
@dbus_service_property(_interface,
2134
signature="t",
1528
2135
access="readwrite")
1529
2136
def Timeout_dbus_property(self, value=None):
1530
2137
if value is None: # get
1531
return dbus.UInt64(self.timeout_milliseconds())
2138
return dbus.UInt64(self.timeout.total_seconds() * 1000)
2139
old_timeout = self.timeout
1532
2140
self.timeout = datetime.timedelta(0, 0, 0, value)
1533
# Reschedule timeout
2141
# Reschedule disabling
1534
2142
if self.enabled:
1535
2143
now = datetime.datetime.utcnow()
1536
time_to_die = timedelta_to_milliseconds(
1537
(self.last_checked_ok + self.timeout) - now)
1538
if time_to_die <= 0:
2144
self.expires += self.timeout - old_timeout
2145
if self.expires <= now:
1539
2146
# The timeout has passed
1540
2147
self.disable()
1541
2148
else:
1542
self.expires = (now +
1543
datetime.timedelta(milliseconds =
1544
time_to_die))
1545
2149
if (getattr(self, "disable_initiator_tag", None)
1546
2150
is None):
1547
2151
return
1548
gobject.source_remove(self.disable_initiator_tag)
1549
self.disable_initiator_tag = (gobject.timeout_add
1550
(time_to_die,
1551
self.disable))
1552
2152
GLib.source_remove(self.disable_initiator_tag)
2153
self.disable_initiator_tag = GLib.timeout_add(
2154
int((self.expires - now).total_seconds() * 1000),
2155
self.disable)
2156
1553
2157
# ExtendedTimeout - property
1554
@dbus_service_property(_interface, signature="t",
2158
@dbus_service_property(_interface,
2159
signature="t",
1555
2160
access="readwrite")
1556
2161
def ExtendedTimeout_dbus_property(self, value=None):
1557
2162
if value is None: # get
1558
return dbus.UInt64(self.extended_timeout_milliseconds())
2163
return dbus.UInt64(self.extended_timeout.total_seconds()
2164
* 1000)
1559
2165
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1560
2166
1561
2167
# Interval - property
1562
@dbus_service_property(_interface, signature="t",
2168
@dbus_service_property(_interface,
2169
signature="t",
1563
2170
access="readwrite")
1564
2171
def Interval_dbus_property(self, value=None):
1565
2172
if value is None: # get
1566
return dbus.UInt64(self.interval_milliseconds())
2173
return dbus.UInt64(self.interval.total_seconds() * 1000)
1567
2174
self.interval = datetime.timedelta(0, 0, 0, value)
1568
2175
if getattr(self, "checker_initiator_tag", None) is None:
1569
2176
return
1570
2177
if self.enabled:
1571
2178
# Reschedule checker run
1572
gobject.source_remove(self.checker_initiator_tag)
1573
self.checker_initiator_tag = (gobject.timeout_add
1574
(value, self.start_checker))
1575
self.start_checker() # Start one now, too
1576
2179
GLib.source_remove(self.checker_initiator_tag)
2180
self.checker_initiator_tag = GLib.timeout_add(
2181
value, self.start_checker)
2182
self.start_checker() # Start one now, too
2183
1577
2184
# Checker - property
1578
@dbus_service_property(_interface, signature="s",
2185
@dbus_service_property(_interface,
2186
signature="s",
1579
2187
access="readwrite")
1580
2188
def Checker_dbus_property(self, value=None):
1581
2189
if value is None: # get
1582
2190
return dbus.String(self.checker_command)
1583
self.checker_command = unicode(value)
1584
2191
self.checker_command = str(value)
2192
1585
2193
# CheckerRunning - property
1586
@dbus_service_property(_interface, signature="b",
2194
@dbus_service_property(_interface,
2195
signature="b",
1587
2196
access="readwrite")
1588
2197
def CheckerRunning_dbus_property(self, value=None):
1589
2198
if value is None: # get
1592
2201
self.start_checker()
1593
2202
else:
1594
2203
self.stop_checker()
1595
2204
1596
2205
# ObjectPath - property
2206
@dbus_annotations(
2207
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
2208
"org.freedesktop.DBus.Deprecated": "true"})
1597
2209
@dbus_service_property(_interface, signature="o", access="read")
1598
2210
def ObjectPath_dbus_property(self):
1599
return self.dbus_object_path # is already a dbus.ObjectPath
1600
2211
return self.dbus_object_path # is already a dbus.ObjectPath
2212
1601
2213
# Secret = property
1602
@dbus_service_property(_interface, signature="ay",
1603
access="write", byte_arrays=True)
2214
@dbus_annotations(
2215
{"org.freedesktop.DBus.Property.EmitsChangedSignal":
2216
"invalidates"})
2217
@dbus_service_property(_interface,
2218
signature="ay",
2219
access="write",
2220
byte_arrays=True)
1604
2221
def Secret_dbus_property(self, value):
1605
self.secret = str(value)
1606
2222
self.secret = bytes(value)
2223
1607
2224
del _interface
1608
2225
1609
2226
1610
class ProxyClient(object):
1611
def __init__(self, child_pipe, fpr, address):
2227
class ProxyClient:
2228
def __init__(self, child_pipe, key_id, fpr, address):
1612
2229
self._pipe = child_pipe
1613
self._pipe.send(('init', fpr, address))
2230
self._pipe.send(('init', key_id, fpr, address))
1614
2231
if not self._pipe.recv():
1615
raise KeyError()
1616
2232
raise KeyError(key_id or fpr)
2233
1617
2234
def __getattribute__(self, name):
1618
2235
if name == '_pipe':
1619
2236
return super(ProxyClient, self).__getattribute__(name)
1622
2239
if data[0] == 'data':
1623
2240
return data[1]
1624
2241
if data[0] == 'function':
2242
1625
2243
def func(*args, **kwargs):
1626
2244
self._pipe.send(('funcall', name, args, kwargs))
1627
2245
return self._pipe.recv()[1]
2246
1628
2247
return func
1629
2248
1630
2249
def __setattr__(self, name, value):
1631
2250
if name == '_pipe':
1632
2251
return super(ProxyClient, self).__setattr__(name, value)
1635
2254
1636
2255
class ClientHandler(socketserver.BaseRequestHandler, object):
1637
2256
"""A class to handle client connections.
1638
2257
1639
2258
Instantiated once for each connection to handle it.
1640
2259
Note: This will run in its own forked process."""
1641
2260
1642
2261
def handle(self):
1643
2262
with contextlib.closing(self.server.child_pipe) as child_pipe:
1644
2263
logger.info("TCP connection from: %s",
1645
unicode(self.client_address))
2264
str(self.client_address))
1646
2265
logger.debug("Pipe FD: %d",
1647
2266
self.server.child_pipe.fileno())
1648
1649
session = (gnutls.connection
1650
.ClientSession(self.request,
1651
gnutls.connection
1652
.X509Credentials()))
1653
1654
# Note: gnutls.connection.X509Credentials is really a
1655
# generic GnuTLS certificate credentials object so long as
1656
# no X.509 keys are added to it. Therefore, we can use it
1657
# here despite using OpenPGP certificates.
1658
1659
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1660
# "+AES-256-CBC", "+SHA1",
1661
# "+COMP-NULL", "+CTYPE-OPENPGP",
1662
# "+DHE-DSS"))
2267
2268
session = gnutls.ClientSession(self.request)
2269
2270
# priority = ':'.join(("NONE", "+VERS-TLS1.1",
2271
# "+AES-256-CBC", "+SHA1",
2272
# "+COMP-NULL", "+CTYPE-OPENPGP",
2273
# "+DHE-DSS"))
1663
2274
# Use a fallback default, since this MUST be set.
1664
2275
priority = self.server.gnutls_priority
1665
2276
if priority is None:
1666
2277
priority = "NORMAL"
1667
(gnutls.library.functions
1668
.gnutls_priority_set_direct(session._c_object,
1669
priority, None))
1670
2278
gnutls.priority_set_direct(session._c_object,
2279
priority.encode("utf-8"),
2280
None)
2281
1671
2282
# Start communication using the Mandos protocol
1672
2283
# Get protocol number
1673
2284
line = self.request.makefile().readline()
1674
2285
logger.debug("Protocol version: %r", line)
1675
2286
try:
1676
2287
if int(line.strip().split()[0]) > 1:
1677
raise RuntimeError
2288
raise RuntimeError(line)
1678
2289
except (ValueError, IndexError, RuntimeError) as error:
1679
2290
logger.error("Unknown protocol version: %s", error)
1680
2291
return
1681
2292
1682
2293
# Start GnuTLS connection
1683
2294
try:
1684
2295
session.handshake()
1685
except gnutls.errors.GNUTLSError as error:
2296
except gnutls.Error as error:
1686
2297
logger.warning("Handshake failed: %s", error)
1687
2298
# Do not run session.bye() here: the session is not
1688
2299
# established. Just abandon the request.
1689
2300
return
1690
2301
logger.debug("Handshake succeeded")
1691
2302
1692
2303
approval_required = False
1693
2304
try:
1694
try:
1695
fpr = self.fingerprint(self.peer_certificate
1696
(session))
1697
except (TypeError,
1698
gnutls.errors.GNUTLSError) as error:
1699
logger.warning("Bad certificate: %s", error)
1700
return
1701
logger.debug("Fingerprint: %s", fpr)
1702
1703
try:
1704
client = ProxyClient(child_pipe, fpr,
2305
if gnutls.has_rawpk:
2306
fpr = b""
2307
try:
2308
key_id = self.key_id(
2309
self.peer_certificate(session))
2310
except (TypeError, gnutls.Error) as error:
2311
logger.warning("Bad certificate: %s", error)
2312
return
2313
logger.debug("Key ID: %s", key_id)
2314
2315
else:
2316
key_id = b""
2317
try:
2318
fpr = self.fingerprint(
2319
self.peer_certificate(session))
2320
except (TypeError, gnutls.Error) as error:
2321
logger.warning("Bad certificate: %s", error)
2322
return
2323
logger.debug("Fingerprint: %s", fpr)
2324
2325
try:
2326
client = ProxyClient(child_pipe, key_id, fpr,
1705
2327
self.client_address)
1706
2328
except KeyError:
1707
2329
return
1708
2330
1709
2331
if client.approval_delay:
1710
2332
delay = client.approval_delay
1711
2333
client.approvals_pending += 1
1712
2334
approval_required = True
1713
2335
1714
2336
while True:
1715
2337
if not client.enabled:
1716
2338
logger.info("Client %s is disabled",
1717
client.name)
2339
client.name)
1718
2340
if self.server.use_dbus:
1719
2341
# Emit D-Bus signal
1720
2342
client.Rejected("Disabled")
1721
2343
return
1722
2344
1723
2345
if client.approved or not client.approval_delay:
1724
#We are approved or approval is disabled
2346
# We are approved or approval is disabled
1725
2347
break
1726
2348
elif client.approved is None:
1727
2349
logger.info("Client %s needs approval",
1729
2351
if self.server.use_dbus:
1730
2352
# Emit D-Bus signal
1731
2353
client.NeedApproval(
1732
client.approval_delay_milliseconds(),
1733
client.approved_by_default)
2354
client.approval_delay.total_seconds()
2355
* 1000, client.approved_by_default)
1734
2356
else:
1735
2357
logger.warning("Client %s was not approved",
1736
2358
client.name)
1738
2360
# Emit D-Bus signal
1739
2361
client.Rejected("Denied")
1740
2362
return
1741
1742
#wait until timeout or approved
2363
2364
# wait until timeout or approved
1743
2365
time = datetime.datetime.now()
1744
2366
client.changedstate.acquire()
1745
(client.changedstate.wait
1746
(float(client.timedelta_to_milliseconds(delay)
1747
/ 1000)))
2367
client.changedstate.wait(delay.total_seconds())
1748
2368
client.changedstate.release()
1749
2369
time2 = datetime.datetime.now()
1750
2370
if (time2 - time) >= delay:
1760
2380
break
1761
2381
else:
1762
2382
delay -= time2 - time
1763
1764
sent_size = 0
1765
while sent_size < len(client.secret):
1766
try:
1767
sent = session.send(client.secret[sent_size:])
1768
except gnutls.errors.GNUTLSError as error:
1769
logger.warning("gnutls send failed",
1770
exc_info=error)
1771
return
1772
logger.debug("Sent: %d, remaining: %d",
1773
sent, len(client.secret)
1774
- (sent_size + sent))
1775
sent_size += sent
1776
2383
2384
try:
2385
session.send(client.secret)
2386
except gnutls.Error as error:
2387
logger.warning("gnutls send failed",
2388
exc_info=error)
2389
return
2390
1777
2391
logger.info("Sending secret to %s", client.name)
1778
2392
# bump the timeout using extended_timeout
1779
2393
client.bump_timeout(client.extended_timeout)
1780
2394
if self.server.use_dbus:
1781
2395
# Emit D-Bus signal
1782
2396
client.GotSecret()
1783
2397
1784
2398
finally:
1785
2399
if approval_required:
1786
2400
client.approvals_pending -= 1
1787
2401
try:
1788
2402
session.bye()
1789
except gnutls.errors.GNUTLSError as error:
2403
except gnutls.Error as error:
1790
2404
logger.warning("GnuTLS bye failed",
1791
2405
exc_info=error)
1792
2406
1793
2407
@staticmethod
1794
2408
def peer_certificate(session):
1795
"Return the peer's OpenPGP certificate as a bytestring"
1796
# If not an OpenPGP certificate...
1797
if (gnutls.library.functions
1798
.gnutls_certificate_type_get(session._c_object)
1799
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1800
# ...do the normal thing
1801
return session.peer_certificate
2409
"Return the peer's certificate as a bytestring"
2410
try:
2411
cert_type = gnutls.certificate_type_get2(session._c_object,
2412
gnutls.CTYPE_PEERS)
2413
except AttributeError:
2414
cert_type = gnutls.certificate_type_get(session._c_object)
2415
if gnutls.has_rawpk:
2416
valid_cert_types = frozenset((gnutls.CRT_RAWPK,))
2417
else:
2418
valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))
2419
# If not a valid certificate type...
2420
if cert_type not in valid_cert_types:
2421
logger.info("Cert type %r not in %r", cert_type,
2422
valid_cert_types)
2423
# ...return invalid data
2424
return b""
1802
2425
list_size = ctypes.c_uint(1)
1803
cert_list = (gnutls.library.functions
1804
.gnutls_certificate_get_peers
2426
cert_list = (gnutls.certificate_get_peers
1805
2427
(session._c_object, ctypes.byref(list_size)))
1806
2428
if not bool(cert_list) and list_size.value != 0:
1807
raise gnutls.errors.GNUTLSError("error getting peer"
1808
" certificate")
2429
raise gnutls.Error("error getting peer certificate")
1809
2430
if list_size.value == 0:
1810
2431
return None
1811
2432
cert = cert_list[0]
1812
2433
return ctypes.string_at(cert.data, cert.size)
1813
2434
2435
@staticmethod
2436
def key_id(certificate):
2437
"Convert a certificate bytestring to a hexdigit key ID"
2438
# New GnuTLS "datum" with the public key
2439
datum = gnutls.datum_t(
2440
ctypes.cast(ctypes.c_char_p(certificate),
2441
ctypes.POINTER(ctypes.c_ubyte)),
2442
ctypes.c_uint(len(certificate)))
2443
# XXX all these need to be created in the gnutls "module"
2444
# New empty GnuTLS certificate
2445
pubkey = gnutls.pubkey_t()
2446
gnutls.pubkey_init(ctypes.byref(pubkey))
2447
# Import the raw public key into the certificate
2448
gnutls.pubkey_import(pubkey,
2449
ctypes.byref(datum),
2450
gnutls.X509_FMT_DER)
2451
# New buffer for the key ID
2452
buf = ctypes.create_string_buffer(32)
2453
buf_len = ctypes.c_size_t(len(buf))
2454
# Get the key ID from the raw public key into the buffer
2455
gnutls.pubkey_get_key_id(pubkey,
2456
gnutls.KEYID_USE_SHA256,
2457
ctypes.cast(ctypes.byref(buf),
2458
ctypes.POINTER(ctypes.c_ubyte)),
2459
ctypes.byref(buf_len))
2460
# Deinit the certificate
2461
gnutls.pubkey_deinit(pubkey)
2462
2463
# Convert the buffer to a Python bytestring
2464
key_id = ctypes.string_at(buf, buf_len.value)
2465
# Convert the bytestring to hexadecimal notation
2466
hex_key_id = binascii.hexlify(key_id).upper()
2467
return hex_key_id
2468
1814
2469
@staticmethod
1815
2470
def fingerprint(openpgp):
1816
2471
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1817
2472
# New GnuTLS "datum" with the OpenPGP public key
1818
datum = (gnutls.library.types
1819
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1820
ctypes.POINTER
1821
(ctypes.c_ubyte)),
1822
ctypes.c_uint(len(openpgp))))
2473
datum = gnutls.datum_t(
2474
ctypes.cast(ctypes.c_char_p(openpgp),
2475
ctypes.POINTER(ctypes.c_ubyte)),
2476
ctypes.c_uint(len(openpgp)))
1823
2477
# New empty GnuTLS certificate
1824
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1825
(gnutls.library.functions
1826
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
2478
crt = gnutls.openpgp_crt_t()
2479
gnutls.openpgp_crt_init(ctypes.byref(crt))
1827
2480
# Import the OpenPGP public key into the certificate
1828
(gnutls.library.functions
1829
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1830
gnutls.library.constants
1831
.GNUTLS_OPENPGP_FMT_RAW))
2481
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2482
gnutls.OPENPGP_FMT_RAW)
1832
2483
# Verify the self signature in the key
1833
2484
crtverify = ctypes.c_uint()
1834
(gnutls.library.functions
1835
.gnutls_openpgp_crt_verify_self(crt, 0,
1836
ctypes.byref(crtverify)))
2485
gnutls.openpgp_crt_verify_self(crt, 0,
2486
ctypes.byref(crtverify))
1837
2487
if crtverify.value != 0:
1838
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1839
raise (gnutls.errors.CertificateSecurityError
1840
("Verify failed"))
2488
gnutls.openpgp_crt_deinit(crt)
2489
raise gnutls.CertificateSecurityError(code
2490
=crtverify.value)
1841
2491
# New buffer for the fingerprint
1842
2492
buf = ctypes.create_string_buffer(20)
1843
2493
buf_len = ctypes.c_size_t()
1844
2494
# Get the fingerprint from the certificate into the buffer
1845
(gnutls.library.functions
1846
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1847
ctypes.byref(buf_len)))
2495
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2496
ctypes.byref(buf_len))
1848
2497
# Deinit the certificate
1849
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2498
gnutls.openpgp_crt_deinit(crt)
1850
2499
# Convert the buffer to a Python bytestring
1851
2500
fpr = ctypes.string_at(buf, buf_len.value)
1852
2501
# Convert the bytestring to hexadecimal notation
1854
2503
return hex_fpr
1855
2504
1856
2505
1857
class MultiprocessingMixIn(object):
2506
class MultiprocessingMixIn:
1858
2507
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2508
1859
2509
def sub_process_main(self, request, address):
1860
2510
try:
1861
2511
self.finish_request(request, address)
1862
2512
except Exception:
1863
2513
self.handle_error(request, address)
1864
2514
self.close_request(request)
1865
2515
1866
2516
def process_request(self, request, address):
1867
2517
"""Start a new process to process the request."""
1868
proc = multiprocessing.Process(target = self.sub_process_main,
1869
args = (request, address))
2518
proc = multiprocessing.Process(target=self.sub_process_main,
2519
args=(request, address))
1870
2520
proc.start()
1871
2521
return proc
1872
2522
1873
2523
1874
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
2524
class MultiprocessingMixInWithPipe(MultiprocessingMixIn):
1875
2525
""" adds a pipe to the MixIn """
2526
1876
2527
def process_request(self, request, client_address):
1877
2528
"""Overrides and wraps the original process_request().
1878
2529
1879
2530
This function creates a new pipe in self.pipe
1880
2531
"""
1881
2532
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1882
2533
1883
2534
proc = MultiprocessingMixIn.process_request(self, request,
1884
2535
client_address)
1885
2536
self.child_pipe.close()
1886
2537
self.add_pipe(parent_pipe, proc)
1887
2538
1888
2539
def add_pipe(self, parent_pipe, proc):
1889
2540
"""Dummy function; override as necessary"""
1890
raise NotImplementedError
2541
raise NotImplementedError()
1891
2542
1892
2543
1893
2544
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1894
socketserver.TCPServer, object):
2545
socketserver.TCPServer):
1895
2546
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1896
2547
1897
2548
Attributes:
1898
2549
enabled: Boolean; whether this server is activated yet
1899
2550
interface: None or a network interface name (string)
1900
2551
use_ipv6: Boolean; to use IPv6 or not
1901
2552
"""
2553
1902
2554
def __init__(self, server_address, RequestHandlerClass,
1903
interface=None, use_ipv6=True):
2555
interface=None,
2556
use_ipv6=True,
2557
socketfd=None):
2558
"""If socketfd is set, use that file descriptor instead of
2559
creating a new one with socket.socket().
2560
"""
1904
2561
self.interface = interface
1905
2562
if use_ipv6:
1906
2563
self.address_family = socket.AF_INET6
2564
if socketfd is not None:
2565
# Save the file descriptor
2566
self.socketfd = socketfd
2567
# Save the original socket.socket() function
2568
self.socket_socket = socket.socket
2569
2570
# To implement --socket, we monkey patch socket.socket.
2571
#
2572
# (When socketserver.TCPServer is a new-style class, we
2573
# could make self.socket into a property instead of monkey
2574
# patching socket.socket.)
2575
#
2576
# Create a one-time-only replacement for socket.socket()
2577
@functools.wraps(socket.socket)
2578
def socket_wrapper(*args, **kwargs):
2579
# Restore original function so subsequent calls are
2580
# not affected.
2581
socket.socket = self.socket_socket
2582
del self.socket_socket
2583
# This time only, return a new socket object from the
2584
# saved file descriptor.
2585
return socket.fromfd(self.socketfd, *args, **kwargs)
2586
# Replace socket.socket() function with wrapper
2587
socket.socket = socket_wrapper
2588
# The socketserver.TCPServer.__init__ will call
2589
# socket.socket(), which might be our replacement,
2590
# socket_wrapper(), if socketfd was set.
1907
2591
socketserver.TCPServer.__init__(self, server_address,
1908
2592
RequestHandlerClass)
2593
1909
2594
def server_bind(self):
1910
2595
"""This overrides the normal server_bind() function
1911
2596
to bind to an interface if one was specified, and also NOT to
1912
2597
bind to an address or port if they were not specified."""
2598
global SO_BINDTODEVICE
1913
2599
if self.interface is not None:
1914
2600
if SO_BINDTODEVICE is None:
1915
logger.error("SO_BINDTODEVICE does not exist;"
1916
" cannot bind to interface %s",
1917
self.interface)
1918
else:
1919
try:
1920
self.socket.setsockopt(socket.SOL_SOCKET,
1921
SO_BINDTODEVICE,
1922
str(self.interface
1923
+ '\0'))
1924
except socket.error as error:
1925
if error[0] == errno.EPERM:
1926
logger.error("No permission to"
1927
" bind to interface %s",
1928
self.interface)
1929
elif error[0] == errno.ENOPROTOOPT:
1930
logger.error("SO_BINDTODEVICE not available;"
1931
" cannot bind to interface %s",
1932
self.interface)
1933
else:
1934
raise
2601
# Fall back to a hard-coded value which seems to be
2602
# common enough.
2603
logger.warning("SO_BINDTODEVICE not found, trying 25")
2604
SO_BINDTODEVICE = 25
2605
try:
2606
self.socket.setsockopt(
2607
socket.SOL_SOCKET, SO_BINDTODEVICE,
2608
(self.interface + "\0").encode("utf-8"))
2609
except socket.error as error:
2610
if error.errno == errno.EPERM:
2611
logger.error("No permission to bind to"
2612
" interface %s", self.interface)
2613
elif error.errno == errno.ENOPROTOOPT:
2614
logger.error("SO_BINDTODEVICE not available;"
2615
" cannot bind to interface %s",
2616
self.interface)
2617
elif error.errno == errno.ENODEV:
2618
logger.error("Interface %s does not exist,"
2619
" cannot bind", self.interface)
2620
else:
2621
raise
1935
2622
# Only bind(2) the socket if we really need to.
1936
2623
if self.server_address[0] or self.server_address[1]:
2624
if self.server_address[1]:
2625
self.allow_reuse_address = True
1937
2626
if not self.server_address[0]:
1938
2627
if self.address_family == socket.AF_INET6:
1939
any_address = "::" # in6addr_any
2628
any_address = "::" # in6addr_any
1940
2629
else:
1941
any_address = socket.INADDR_ANY
2630
any_address = "0.0.0.0" # INADDR_ANY
1942
2631
self.server_address = (any_address,
1943
2632
self.server_address[1])
1944
2633
elif not self.server_address[1]:
1945
self.server_address = (self.server_address[0],
1946
0)
2634
self.server_address = (self.server_address[0], 0)
1947
2635
# if self.interface:
1948
2636
# self.server_address = (self.server_address[0],
1949
2637
# 0, # port
1955
2643
1956
2644
class MandosServer(IPv6_TCPServer):
1957
2645
"""Mandos server.
1958
2646
1959
2647
Attributes:
1960
2648
clients: set of Client objects
1961
2649
gnutls_priority GnuTLS priority string
1962
2650
use_dbus: Boolean; to emit D-Bus signals or not
1963
1964
Assumes a gobject.MainLoop event loop.
2651
2652
Assumes a GLib.MainLoop event loop.
1965
2653
"""
2654
1966
2655
def __init__(self, server_address, RequestHandlerClass,
1967
interface=None, use_ipv6=True, clients=None,
1968
gnutls_priority=None, use_dbus=True):
2656
interface=None,
2657
use_ipv6=True,
2658
clients=None,
2659
gnutls_priority=None,
2660
use_dbus=True,
2661
socketfd=None):
1969
2662
self.enabled = False
1970
2663
self.clients = clients
1971
2664
if self.clients is None:
1974
2667
self.gnutls_priority = gnutls_priority
1975
2668
IPv6_TCPServer.__init__(self, server_address,
1976
2669
RequestHandlerClass,
1977
interface = interface,
1978
use_ipv6 = use_ipv6)
2670
interface=interface,
2671
use_ipv6=use_ipv6,
2672
socketfd=socketfd)
2673
1979
2674
def server_activate(self):
1980
2675
if self.enabled:
1981
2676
return socketserver.TCPServer.server_activate(self)
1982
2677
1983
2678
def enable(self):
1984
2679
self.enabled = True
1985
2680
1986
2681
def add_pipe(self, parent_pipe, proc):
1987
2682
# Call "handle_ipc" for both data and EOF events
1988
gobject.io_add_watch(parent_pipe.fileno(),
1989
gobject.IO_IN | gobject.IO_HUP,
1990
functools.partial(self.handle_ipc,
1991
parent_pipe =
1992
parent_pipe,
1993
proc = proc))
1994
1995
def handle_ipc(self, source, condition, parent_pipe=None,
1996
proc = None, client_object=None):
2683
GLib.io_add_watch(
2684
GLib.IOChannel.unix_new(parent_pipe.fileno()),
2685
GLib.PRIORITY_DEFAULT, GLib.IO_IN | GLib.IO_HUP,
2686
functools.partial(self.handle_ipc,
2687
parent_pipe=parent_pipe,
2688
proc=proc))
2689
2690
def handle_ipc(self, source, condition,
2691
parent_pipe=None,
2692
proc=None,
2693
client_object=None):
1997
2694
# error, or the other end of multiprocessing.Pipe has closed
1998
if condition & (gobject.IO_ERR | gobject.IO_HUP):
2695
if condition & (GLib.IO_ERR | GLib.IO_HUP):
1999
2696
# Wait for other process to exit
2000
2697
proc.join()
2001
2698
return False
2002
2699
2003
2700
# Read a request from the child
2004
2701
request = parent_pipe.recv()
2005
2702
command = request[0]
2006
2703
2007
2704
if command == 'init':
2008
fpr = request[1]
2009
address = request[2]
2010
2011
for c in self.clients.itervalues():
2012
if c.fingerprint == fpr:
2705
key_id = request[1].decode("ascii")
2706
fpr = request[2].decode("ascii")
2707
address = request[3]
2708
2709
for c in self.clients.values():
2710
if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":
2711
continue
2712
if key_id and c.key_id == key_id:
2713
client = c
2714
break
2715
if fpr and c.fingerprint == fpr:
2013
2716
client = c
2014
2717
break
2015
2718
else:
2016
logger.info("Client not found for fingerprint: %s, ad"
2017
"dress: %s", fpr, address)
2719
logger.info("Client not found for key ID: %s, address"
2720
": %s", key_id or fpr, address)
2018
2721
if self.use_dbus:
2019
2722
# Emit D-Bus signal
2020
mandos_dbus_service.ClientNotFound(fpr,
2723
mandos_dbus_service.ClientNotFound(key_id or fpr,
2021
2724
address[0])
2022
2725
parent_pipe.send(False)
2023
2726
return False
2024
2025
gobject.io_add_watch(parent_pipe.fileno(),
2026
gobject.IO_IN | gobject.IO_HUP,
2027
functools.partial(self.handle_ipc,
2028
parent_pipe =
2029
parent_pipe,
2030
proc = proc,
2031
client_object =
2032
client))
2727
2728
GLib.io_add_watch(
2729
GLib.IOChannel.unix_new(parent_pipe.fileno()),
2730
GLib.PRIORITY_DEFAULT, GLib.IO_IN | GLib.IO_HUP,
2731
functools.partial(self.handle_ipc,
2732
parent_pipe=parent_pipe,
2733
proc=proc,
2734
client_object=client))
2033
2735
parent_pipe.send(True)
2034
2736
# remove the old hook in favor of the new above hook on
2035
2737
# same fileno
2038
2740
funcname = request[1]
2039
2741
args = request[2]
2040
2742
kwargs = request[3]
2041
2743
2042
2744
parent_pipe.send(('data', getattr(client_object,
2043
2745
funcname)(*args,
2044
**kwargs)))
2045
2746
**kwargs)))
2747
2046
2748
if command == 'getattr':
2047
2749
attrname = request[1]
2048
if callable(client_object.__getattribute__(attrname)):
2049
parent_pipe.send(('function',))
2750
if isinstance(client_object.__getattribute__(attrname),
2751
collections.Callable):
2752
parent_pipe.send(('function', ))
2050
2753
else:
2051
parent_pipe.send(('data', client_object
2052
.__getattribute__(attrname)))
2053
2754
parent_pipe.send((
2755
'data', client_object.__getattribute__(attrname)))
2756
2054
2757
if command == 'setattr':
2055
2758
attrname = request[1]
2056
2759
value = request[2]
2057
2760
setattr(client_object, attrname, value)
2058
2761
2059
2762
return True
2060
2763
2061
2764
2765
def rfc3339_duration_to_delta(duration):
2766
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2767
2768
>>> rfc3339_duration_to_delta("P7D") == datetime.timedelta(7)
2769
True
2770
>>> rfc3339_duration_to_delta("PT60S") == datetime.timedelta(0, 60)
2771
True
2772
>>> rfc3339_duration_to_delta("PT60M") == datetime.timedelta(0, 3600)
2773
True
2774
>>> rfc3339_duration_to_delta("PT24H") == datetime.timedelta(1)
2775
True
2776
>>> rfc3339_duration_to_delta("P1W") == datetime.timedelta(7)
2777
True
2778
>>> rfc3339_duration_to_delta("PT5M30S") == datetime.timedelta(0, 330)
2779
True
2780
>>> rfc3339_duration_to_delta("P1DT3M20S") == datetime.timedelta(1, 200)
2781
True
2782
"""
2783
2784
# Parsing an RFC 3339 duration with regular expressions is not
2785
# possible - there would have to be multiple places for the same
2786
# values, like seconds. The current code, while more esoteric, is
2787
# cleaner without depending on a parsing library. If Python had a
2788
# built-in library for parsing we would use it, but we'd like to
2789
# avoid excessive use of external libraries.
2790
2791
# New type for defining tokens, syntax, and semantics all-in-one
2792
Token = collections.namedtuple("Token", (
2793
"regexp", # To match token; if "value" is not None, must have
2794
# a "group" containing digits
2795
"value", # datetime.timedelta or None
2796
"followers")) # Tokens valid after this token
2797
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2798
# the "duration" ABNF definition in RFC 3339, Appendix A.
2799
token_end = Token(re.compile(r"$"), None, frozenset())
2800
token_second = Token(re.compile(r"(\d+)S"),
2801
datetime.timedelta(seconds=1),
2802
frozenset((token_end, )))
2803
token_minute = Token(re.compile(r"(\d+)M"),
2804
datetime.timedelta(minutes=1),
2805
frozenset((token_second, token_end)))
2806
token_hour = Token(re.compile(r"(\d+)H"),
2807
datetime.timedelta(hours=1),
2808
frozenset((token_minute, token_end)))
2809
token_time = Token(re.compile(r"T"),
2810
None,
2811
frozenset((token_hour, token_minute,
2812
token_second)))
2813
token_day = Token(re.compile(r"(\d+)D"),
2814
datetime.timedelta(days=1),
2815
frozenset((token_time, token_end)))
2816
token_month = Token(re.compile(r"(\d+)M"),
2817
datetime.timedelta(weeks=4),
2818
frozenset((token_day, token_end)))
2819
token_year = Token(re.compile(r"(\d+)Y"),
2820
datetime.timedelta(weeks=52),
2821
frozenset((token_month, token_end)))
2822
token_week = Token(re.compile(r"(\d+)W"),
2823
datetime.timedelta(weeks=1),
2824
frozenset((token_end, )))
2825
token_duration = Token(re.compile(r"P"), None,
2826
frozenset((token_year, token_month,
2827
token_day, token_time,
2828
token_week)))
2829
# Define starting values:
2830
# Value so far
2831
value = datetime.timedelta()
2832
found_token = None
2833
# Following valid tokens
2834
followers = frozenset((token_duration, ))
2835
# String left to parse
2836
s = duration
2837
# Loop until end token is found
2838
while found_token is not token_end:
2839
# Search for any currently valid tokens
2840
for token in followers:
2841
match = token.regexp.match(s)
2842
if match is not None:
2843
# Token found
2844
if token.value is not None:
2845
# Value found, parse digits
2846
factor = int(match.group(1), 10)
2847
# Add to value so far
2848
value += factor * token.value
2849
# Strip token from string
2850
s = token.regexp.sub("", s, 1)
2851
# Go to found token
2852
found_token = token
2853
# Set valid next tokens
2854
followers = found_token.followers
2855
break
2856
else:
2857
# No currently valid tokens were found
2858
raise ValueError("Invalid RFC 3339 duration: {!r}"
2859
.format(duration))
2860
# End token found
2861
return value
2862
2863
2062
2864
def string_to_delta(interval):
2063
2865
"""Parse a string and return a datetime.timedelta
2064
2065
>>> string_to_delta('7d')
2066
datetime.timedelta(7)
2067
>>> string_to_delta('60s')
2068
datetime.timedelta(0, 60)
2069
>>> string_to_delta('60m')
2070
datetime.timedelta(0, 3600)
2071
>>> string_to_delta('24h')
2072
datetime.timedelta(1)
2073
>>> string_to_delta('1w')
2074
datetime.timedelta(7)
2075
>>> string_to_delta('5m 30s')
2076
datetime.timedelta(0, 330)
2866
2867
>>> string_to_delta('7d') == datetime.timedelta(7)
2868
True
2869
>>> string_to_delta('60s') == datetime.timedelta(0, 60)
2870
True
2871
>>> string_to_delta('60m') == datetime.timedelta(0, 3600)
2872
True
2873
>>> string_to_delta('24h') == datetime.timedelta(1)
2874
True
2875
>>> string_to_delta('1w') == datetime.timedelta(7)
2876
True
2877
>>> string_to_delta('5m 30s') == datetime.timedelta(0, 330)
2878
True
2077
2879
"""
2880
2881
try:
2882
return rfc3339_duration_to_delta(interval)
2883
except ValueError:
2884
pass
2885
2078
2886
timevalue = datetime.timedelta(0)
2079
2887
for s in interval.split():
2080
2888
try:
2081
suffix = unicode(s[-1])
2889
suffix = s[-1]
2082
2890
value = int(s[:-1])
2083
2891
if suffix == "d":
2084
2892
delta = datetime.timedelta(value)
2091
2899
elif suffix == "w":
2092
2900
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
2093
2901
else:
2094
raise ValueError("Unknown suffix {0!r}"
2095
.format(suffix))
2096
except (ValueError, IndexError) as e:
2902
raise ValueError("Unknown suffix {!r}".format(suffix))
2903
except IndexError as e:
2097
2904
raise ValueError(*(e.args))
2098
2905
timevalue += delta
2099
2906
return timevalue
2100
2907
2101
2908
2102
def daemon(nochdir = False, noclose = False):
2909
def daemon(nochdir=False, noclose=False):
2103
2910
"""See daemon(3). Standard BSD Unix function.
2104
2911
2105
2912
This should really exist as os.daemon, but it doesn't (yet)."""
2106
2913
if os.fork():
2107
2914
sys.exit()
2115
2922
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2116
2923
if not stat.S_ISCHR(os.fstat(null).st_mode):
2117
2924
raise OSError(errno.ENODEV,
2118
"{0} not a character device"
2925
"{} not a character device"
2119
2926
.format(os.devnull))
2120
2927
os.dup2(null, sys.stdin.fileno())
2121
2928
os.dup2(null, sys.stdout.fileno())
2125
2932
2126
2933
2127
2934
def main():
2128
2935
2129
2936
##################################################################
2130
2937
# Parsing of options, both command line and config file
2131
2938
2132
2939
parser = argparse.ArgumentParser()
2133
2940
parser.add_argument("-v", "--version", action="version",
2134
version = "%(prog)s {0}".format(version),
2941
version="%(prog)s {}".format(version),
2135
2942
help="show version number and exit")
2136
2943
parser.add_argument("-i", "--interface", metavar="IF",
2137
2944
help="Bind to interface IF")
2143
2950
help="Run self-test")
2144
2951
parser.add_argument("--debug", action="store_true",
2145
2952
help="Debug mode; run in foreground and log"
2146
" to terminal")
2953
" to terminal", default=None)
2147
2954
parser.add_argument("--debuglevel", metavar="LEVEL",
2148
2955
help="Debug level for stdout output")
2149
2956
parser.add_argument("--priority", help="GnuTLS"
2156
2963
" files")
2157
2964
parser.add_argument("--no-dbus", action="store_false",
2158
2965
dest="use_dbus", help="Do not provide D-Bus"
2159
" system bus interface")
2966
" system bus interface", default=None)
2160
2967
parser.add_argument("--no-ipv6", action="store_false",
2161
dest="use_ipv6", help="Do not use IPv6")
2968
dest="use_ipv6", help="Do not use IPv6",
2969
default=None)
2162
2970
parser.add_argument("--no-restore", action="store_false",
2163
2971
dest="restore", help="Do not restore stored"
2164
" state")
2972
" state", default=None)
2973
parser.add_argument("--socket", type=int,
2974
help="Specify a file descriptor to a network"
2975
" socket to use instead of creating one")
2165
2976
parser.add_argument("--statedir", metavar="DIR",
2166
2977
help="Directory to save/restore state in")
2167
2978
parser.add_argument("--foreground", action="store_true",
2979
help="Run in foreground", default=None)
2980
parser.add_argument("--no-zeroconf", action="store_false",
2981
dest="zeroconf", help="Do not use Zeroconf",
2982
default=None)
2983
2168
2984
options = parser.parse_args()
2169
2170
if options.check:
2171
import doctest
2172
doctest.testmod()
2173
sys.exit()
2174
2985
2175
2986
# Default values for config file for server-global settings
2176
server_defaults = { "interface": "",
2177
"address": "",
2178
"port": "",
2179
"debug": "False",
2180
"priority":
2181
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2182
"servicename": "Mandos",
2183
"use_dbus": "True",
2184
"use_ipv6": "True",
2185
"debuglevel": "",
2186
"restore": "True",
2187
"statedir": "/var/lib/mandos"
2188
}
2189
2987
if gnutls.has_rawpk:
2988
priority = ("SECURE128:!CTYPE-X.509:+CTYPE-RAWPK:!RSA"
2989
":!VERS-ALL:+VERS-TLS1.3:%PROFILE_ULTRA")
2990
else:
2991
priority = ("SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2992
":+SIGN-DSA-SHA256")
2993
server_defaults = {"interface": "",
2994
"address": "",
2995
"port": "",
2996
"debug": "False",
2997
"priority": priority,
2998
"servicename": "Mandos",
2999
"use_dbus": "True",
3000
"use_ipv6": "True",
3001
"debuglevel": "",
3002
"restore": "True",
3003
"socket": "",
3004
"statedir": "/var/lib/mandos",
3005
"foreground": "False",
3006
"zeroconf": "True",
3007
}
3008
del priority
3009
2190
3010
# Parse config file for server-global settings
2191
server_config = configparser.SafeConfigParser(server_defaults)
3011
server_config = configparser.ConfigParser(server_defaults)
2192
3012
del server_defaults
2193
server_config.read(os.path.join(options.configdir,
2194
"mandos.conf"))
2195
# Convert the SafeConfigParser object to a dict
3013
server_config.read(os.path.join(options.configdir, "mandos.conf"))
3014
# Convert the ConfigParser object to a dict
2196
3015
server_settings = server_config.defaults()
2197
3016
# Use the appropriate methods on the non-string config options
2198
for option in ("debug", "use_dbus", "use_ipv6"):
3017
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3018
"foreground", "zeroconf"):
2199
3019
server_settings[option] = server_config.getboolean("DEFAULT",
2200
3020
option)
2201
3021
if server_settings["port"]:
2202
3022
server_settings["port"] = server_config.getint("DEFAULT",
2203
3023
"port")
3024
if server_settings["socket"]:
3025
server_settings["socket"] = server_config.getint("DEFAULT",
3026
"socket")
3027
# Later, stdin will, and stdout and stderr might, be dup'ed
3028
# over with an opened os.devnull. But we don't want this to
3029
# happen with a supplied network socket.
3030
if 0 <= server_settings["socket"] <= 2:
3031
server_settings["socket"] = os.dup(server_settings
3032
["socket"])
2204
3033
del server_config
2205
3034
2206
3035
# Override the settings from the config file with command line
2207
3036
# options, if set.
2208
3037
for option in ("interface", "address", "port", "debug",
2209
"priority", "servicename", "configdir",
2210
"use_dbus", "use_ipv6", "debuglevel", "restore",
2211
"statedir"):
3038
"priority", "servicename", "configdir", "use_dbus",
3039
"use_ipv6", "debuglevel", "restore", "statedir",
3040
"socket", "foreground", "zeroconf"):
2212
3041
value = getattr(options, option)
2213
3042
if value is not None:
2214
3043
server_settings[option] = value
2215
3044
del options
2216
3045
# Force all strings to be unicode
2217
3046
for option in server_settings.keys():
2218
if type(server_settings[option]) is str:
2219
server_settings[option] = unicode(server_settings[option])
3047
if isinstance(server_settings[option], bytes):
3048
server_settings[option] = (server_settings[option]
3049
.decode("utf-8"))
3050
# Force all boolean options to be boolean
3051
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3052
"foreground", "zeroconf"):
3053
server_settings[option] = bool(server_settings[option])
3054
# Debug implies foreground
3055
if server_settings["debug"]:
3056
server_settings["foreground"] = True
2220
3057
# Now we have our good server settings in "server_settings"
2221
3058
2222
3059
##################################################################
2223
3060
3061
if (not server_settings["zeroconf"]
3062
and not (server_settings["port"]
3063
or server_settings["socket"] != "")):
3064
parser.error("Needs port or socket to work without Zeroconf")
3065
2224
3066
# For convenience
2225
3067
debug = server_settings["debug"]
2226
3068
debuglevel = server_settings["debuglevel"]
2228
3070
use_ipv6 = server_settings["use_ipv6"]
2229
3071
stored_state_path = os.path.join(server_settings["statedir"],
2230
3072
stored_state_file)
2231
3073
foreground = server_settings["foreground"]
3074
zeroconf = server_settings["zeroconf"]
3075
2232
3076
if debug:
2233
3077
initlogger(debug, logging.DEBUG)
2234
3078
else:
2237
3081
else:
2238
3082
level = getattr(logging, debuglevel.upper())
2239
3083
initlogger(debug, level)
2240
3084
2241
3085
if server_settings["servicename"] != "Mandos":
2242
syslogger.setFormatter(logging.Formatter
2243
('Mandos ({0}) [%(process)d]:'
2244
' %(levelname)s: %(message)s'
2245
.format(server_settings
2246
["servicename"])))
2247
3086
syslogger.setFormatter(
3087
logging.Formatter('Mandos ({}) [%(process)d]:'
3088
' %(levelname)s: %(message)s'.format(
3089
server_settings["servicename"])))
3090
2248
3091
# Parse config file with clients
2249
client_config = configparser.SafeConfigParser(Client
2250
.client_defaults)
3092
client_config = configparser.ConfigParser(Client.client_defaults)
2251
3093
client_config.read(os.path.join(server_settings["configdir"],
2252
3094
"clients.conf"))
2253
3095
2254
3096
global mandos_dbus_service
2255
3097
mandos_dbus_service = None
2256
2257
tcp_server = MandosServer((server_settings["address"],
2258
server_settings["port"]),
2259
ClientHandler,
2260
interface=(server_settings["interface"]
2261
or None),
2262
use_ipv6=use_ipv6,
2263
gnutls_priority=
2264
server_settings["priority"],
2265
use_dbus=use_dbus)
2266
if not debug:
2267
pidfilename = "/var/run/mandos.pid"
3098
3099
socketfd = None
3100
if server_settings["socket"] != "":
3101
socketfd = server_settings["socket"]
3102
tcp_server = MandosServer(
3103
(server_settings["address"], server_settings["port"]),
3104
ClientHandler,
3105
interface=(server_settings["interface"] or None),
3106
use_ipv6=use_ipv6,
3107
gnutls_priority=server_settings["priority"],
3108
use_dbus=use_dbus,
3109
socketfd=socketfd)
3110
if not foreground:
3111
pidfilename = "/run/mandos.pid"
3112
if not os.path.isdir("/run/."):
3113
pidfilename = "/var/run/mandos.pid"
3114
pidfile = None
2268
3115
try:
2269
pidfile = open(pidfilename, "w")
3116
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
2270
3117
except IOError as e:
2271
3118
logger.error("Could not open file %r", pidfilename,
2272
3119
exc_info=e)
2273
2274
for name in ("_mandos", "mandos", "nobody"):
3120
3121
for name, group in (("_mandos", "_mandos"),
3122
("mandos", "mandos"),
3123
("nobody", "nogroup")):
2275
3124
try:
2276
3125
uid = pwd.getpwnam(name).pw_uid
2277
gid = pwd.getpwnam(name).pw_gid
3126
gid = pwd.getpwnam(group).pw_gid
2278
3127
break
2279
3128
except KeyError:
2280
3129
continue
2284
3133
try:
2285
3134
os.setgid(gid)
2286
3135
os.setuid(uid)
3136
if debug:
3137
logger.debug("Did setuid/setgid to {}:{}".format(uid,
3138
gid))
2287
3139
except OSError as error:
2288
if error[0] != errno.EPERM:
2289
raise error
2290
3140
logger.warning("Failed to setuid/setgid to {}:{}: {}"
3141
.format(uid, gid, os.strerror(error.errno)))
3142
if error.errno != errno.EPERM:
3143
raise
3144
2291
3145
if debug:
2292
3146
# Enable all possible GnuTLS debugging
2293
3147
2294
3148
# "Use a log level over 10 to enable all debugging options."
2295
3149
# - GnuTLS manual
2296
gnutls.library.functions.gnutls_global_set_log_level(11)
2297
2298
@gnutls.library.types.gnutls_log_func
3150
gnutls.global_set_log_level(11)
3151
3152
@gnutls.log_func
2299
3153
def debug_gnutls(level, string):
2300
3154
logger.debug("GnuTLS: %s", string[:-1])
2301
2302
(gnutls.library.functions
2303
.gnutls_global_set_log_function(debug_gnutls))
2304
3155
3156
gnutls.global_set_log_function(debug_gnutls)
3157
2305
3158
# Redirect stdin so all checkers get /dev/null
2306
3159
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2307
3160
os.dup2(null, sys.stdin.fileno())
2308
3161
if null > 2:
2309
3162
os.close(null)
2310
3163
2311
3164
# Need to fork before connecting to D-Bus
2312
if not debug:
3165
if not foreground:
2313
3166
# Close all input and output, do double fork, etc.
2314
3167
daemon()
2315
2316
gobject.threads_init()
2317
3168
3169
if gi.version_info < (3, 10, 2):
3170
# multiprocessing will use threads, so before we use GLib we
3171
# need to inform GLib that threads will be used.
3172
GLib.threads_init()
3173
2318
3174
global main_loop
2319
3175
# From the Avahi example code
2320
3176
DBusGMainLoop(set_as_default=True)
2321
main_loop = gobject.MainLoop()
3177
main_loop = GLib.MainLoop()
2322
3178
bus = dbus.SystemBus()
2323
3179
# End of Avahi example code
2324
3180
if use_dbus:
2325
3181
try:
2326
3182
bus_name = dbus.service.BusName("se.recompile.Mandos",
2327
bus, do_not_queue=True)
2328
old_bus_name = (dbus.service.BusName
2329
("se.bsnet.fukt.Mandos", bus,
2330
do_not_queue=True))
2331
except dbus.exceptions.NameExistsException as e:
3183
bus,
3184
do_not_queue=True)
3185
old_bus_name = dbus.service.BusName(
3186
"se.bsnet.fukt.Mandos", bus,
3187
do_not_queue=True)
3188
except dbus.exceptions.DBusException as e:
2332
3189
logger.error("Disabling D-Bus:", exc_info=e)
2333
3190
use_dbus = False
2334
3191
server_settings["use_dbus"] = False
2335
3192
tcp_server.use_dbus = False
2336
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2337
service = AvahiServiceToSyslog(name =
2338
server_settings["servicename"],
2339
servicetype = "_mandos._tcp",
2340
protocol = protocol, bus = bus)
2341
if server_settings["interface"]:
2342
service.interface = (if_nametoindex
2343
(str(server_settings["interface"])))
2344
3193
if zeroconf:
3194
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3195
service = AvahiServiceToSyslog(
3196
name=server_settings["servicename"],
3197
servicetype="_mandos._tcp",
3198
protocol=protocol,
3199
bus=bus)
3200
if server_settings["interface"]:
3201
service.interface = if_nametoindex(
3202
server_settings["interface"].encode("utf-8"))
3203
2345
3204
global multiprocessing_manager
2346
3205
multiprocessing_manager = multiprocessing.Manager()
2347
3206
2348
3207
client_class = Client
2349
3208
if use_dbus:
2350
client_class = functools.partial(ClientDBus, bus = bus)
2351
3209
client_class = functools.partial(ClientDBus, bus=bus)
3210
2352
3211
client_settings = Client.config_parser(client_config)
2353
3212
old_client_settings = {}
2354
3213
clients_data = {}
2355
3214
3215
# This is used to redirect stdout and stderr for checker processes
3216
global wnull
3217
wnull = open(os.devnull, "w") # A writable /dev/null
3218
# Only used if server is running in foreground but not in debug
3219
# mode
3220
if debug or not foreground:
3221
wnull.close()
3222
2356
3223
# Get client data and settings from last running state.
2357
3224
if server_settings["restore"]:
2358
3225
try:
2359
3226
with open(stored_state_path, "rb") as stored_state:
2360
clients_data, old_client_settings = (pickle.load
2361
(stored_state))
3227
if sys.version_info.major == 2:
3228
clients_data, old_client_settings = pickle.load(
3229
stored_state)
3230
else:
3231
bytes_clients_data, bytes_old_client_settings = (
3232
pickle.load(stored_state, encoding="bytes"))
3233
# Fix bytes to strings
3234
# clients_data
3235
# .keys()
3236
clients_data = {(key.decode("utf-8")
3237
if isinstance(key, bytes)
3238
else key): value
3239
for key, value in
3240
bytes_clients_data.items()}
3241
del bytes_clients_data
3242
for key in clients_data:
3243
value = {(k.decode("utf-8")
3244
if isinstance(k, bytes) else k): v
3245
for k, v in
3246
clients_data[key].items()}
3247
clients_data[key] = value
3248
# .client_structure
3249
value["client_structure"] = [
3250
(s.decode("utf-8")
3251
if isinstance(s, bytes)
3252
else s) for s in
3253
value["client_structure"]]
3254
# .name, .host, and .checker_command
3255
for k in ("name", "host", "checker_command"):
3256
if isinstance(value[k], bytes):
3257
value[k] = value[k].decode("utf-8")
3258
if "key_id" not in value:
3259
value["key_id"] = ""
3260
elif "fingerprint" not in value:
3261
value["fingerprint"] = ""
3262
# old_client_settings
3263
# .keys()
3264
old_client_settings = {
3265
(key.decode("utf-8")
3266
if isinstance(key, bytes)
3267
else key): value
3268
for key, value in
3269
bytes_old_client_settings.items()}
3270
del bytes_old_client_settings
3271
# .host and .checker_command
3272
for value in old_client_settings.values():
3273
for attribute in ("host", "checker_command"):
3274
if isinstance(value[attribute], bytes):
3275
value[attribute] = (value[attribute]
3276
.decode("utf-8"))
2362
3277
os.remove(stored_state_path)
2363
3278
except IOError as e:
2364
3279
if e.errno == errno.ENOENT:
2365
logger.warning("Could not load persistent state: {0}"
2366
.format(os.strerror(e.errno)))
3280
logger.warning("Could not load persistent state:"
3281
" {}".format(os.strerror(e.errno)))
2367
3282
else:
2368
3283
logger.critical("Could not load persistent state:",
2369
3284
exc_info=e)
2370
3285
raise
2371
3286
except EOFError as e:
2372
3287
logger.warning("Could not load persistent state: "
2373
"EOFError:", exc_info=e)
2374
3288
"EOFError:",
3289
exc_info=e)
3290
2375
3291
with PGPEngine() as pgp:
2376
for client_name, client in clients_data.iteritems():
3292
for client_name, client in clients_data.items():
3293
# Skip removed clients
3294
if client_name not in client_settings:
3295
continue
3296
2377
3297
# Decide which value to use after restoring saved state.
2378
3298
# We have three different values: Old config file,
2379
3299
# new config file, and saved state.
2384
3304
# For each value in new config, check if it
2385
3305
# differs from the old config value (Except for
2386
3306
# the "secret" attribute)
2387
if (name != "secret" and
2388
value != old_client_settings[client_name]
2389
[name]):
3307
if (name != "secret"
3308
and (value !=
3309
old_client_settings[client_name][name])):
2390
3310
client[name] = value
2391
3311
except KeyError:
2392
3312
pass
2393
3313
2394
3314
# Clients who has passed its expire date can still be
2395
# enabled if its last checker was successful. Clients
3315
# enabled if its last checker was successful. A Client
2396
3316
# whose checker succeeded before we stored its state is
2397
3317
# assumed to have successfully run all checkers during
2398
3318
# downtime.
2400
3320
if datetime.datetime.utcnow() >= client["expires"]:
2401
3321
if not client["last_checked_ok"]:
2402
3322
logger.warning(
2403
"disabling client {0} - Client never "
2404
"performed a successful checker"
2405
.format(client_name))
3323
"disabling client {} - Client never "
3324
"performed a successful checker".format(
3325
client_name))
2406
3326
client["enabled"] = False
2407
3327
elif client["last_checker_status"] != 0:
2408
3328
logger.warning(
2409
"disabling client {0} - Client "
2410
"last checker failed with error code {1}"
2411
.format(client_name,
2412
client["last_checker_status"]))
3329
"disabling client {} - Client last"
3330
" checker failed with error code"
3331
" {}".format(
3332
client_name,
3333
client["last_checker_status"]))
2413
3334
client["enabled"] = False
2414
3335
else:
2415
client["expires"] = (datetime.datetime
2416
.utcnow()
2417
+ client["timeout"])
3336
client["expires"] = (
3337
datetime.datetime.utcnow()
3338
+ client["timeout"])
2418
3339
logger.debug("Last checker succeeded,"
2419
" keeping {0} enabled"
2420
.format(client_name))
3340
" keeping {} enabled".format(
3341
client_name))
2421
3342
try:
2422
client["secret"] = (
2423
pgp.decrypt(client["encrypted_secret"],
2424
client_settings[client_name]
2425
["secret"]))
3343
client["secret"] = pgp.decrypt(
3344
client["encrypted_secret"],
3345
client_settings[client_name]["secret"])
2426
3346
except PGPError:
2427
3347
# If decryption fails, we use secret from new settings
2428
logger.debug("Failed to decrypt {0} old secret"
2429
.format(client_name))
2430
client["secret"] = (
2431
client_settings[client_name]["secret"])
2432
3348
logger.debug("Failed to decrypt {} old secret".format(
3349
client_name))
3350
client["secret"] = (client_settings[client_name]
3351
["secret"])
3352
2433
3353
# Add/remove clients based on new changes made to config
2434
3354
for client_name in (set(old_client_settings)
2435
3355
- set(client_settings)):
2437
3357
for client_name in (set(client_settings)
2438
3358
- set(old_client_settings)):
2439
3359
clients_data[client_name] = client_settings[client_name]
2440
3360
2441
3361
# Create all client objects
2442
for client_name, client in clients_data.iteritems():
3362
for client_name, client in clients_data.items():
2443
3363
tcp_server.clients[client_name] = client_class(
2444
name = client_name, settings = client)
2445
3364
name=client_name,
3365
settings=client,
3366
server_settings=server_settings)
3367
2446
3368
if not tcp_server.clients:
2447
3369
logger.warning("No clients defined")
2448
2449
if not debug:
2450
try:
2451
with pidfile:
2452
pid = os.getpid()
2453
pidfile.write(str(pid) + "\n".encode("utf-8"))
2454
del pidfile
2455
except IOError:
2456
logger.error("Could not write to file %r with PID %d",
2457
pidfilename, pid)
2458
except NameError:
2459
# "pidfile" was never created
2460
pass
3370
3371
if not foreground:
3372
if pidfile is not None:
3373
pid = os.getpid()
3374
try:
3375
with pidfile:
3376
print(pid, file=pidfile)
3377
except IOError:
3378
logger.error("Could not write to file %r with PID %d",
3379
pidfilename, pid)
3380
del pidfile
2461
3381
del pidfilename
2462
signal.signal(signal.SIGINT, signal.SIG_IGN)
2463
2464
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2465
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2466
3382
3383
for termsig in (signal.SIGHUP, signal.SIGTERM):
3384
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3385
lambda: main_loop.quit() and False)
3386
2467
3387
if use_dbus:
2468
@alternate_dbus_interfaces({"se.recompile.Mandos":
2469
"se.bsnet.fukt.Mandos"})
2470
class MandosDBusService(DBusObjectWithProperties):
3388
3389
@alternate_dbus_interfaces(
3390
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3391
class MandosDBusService(DBusObjectWithObjectManager):
2471
3392
"""A D-Bus proxy object"""
3393
2472
3394
def __init__(self):
2473
3395
dbus.service.Object.__init__(self, bus, "/")
3396
2474
3397
_interface = "se.recompile.Mandos"
2475
2476
@dbus_interface_annotations(_interface)
2477
def _foo(self):
2478
return { "org.freedesktop.DBus.Property"
2479
".EmitsChangedSignal":
2480
"false"}
2481
3398
2482
3399
@dbus.service.signal(_interface, signature="o")
2483
3400
def ClientAdded(self, objpath):
2484
3401
"D-Bus signal"
2485
3402
pass
2486
3403
2487
3404
@dbus.service.signal(_interface, signature="ss")
2488
def ClientNotFound(self, fingerprint, address):
3405
def ClientNotFound(self, key_id, address):
2489
3406
"D-Bus signal"
2490
3407
pass
2491
3408
3409
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3410
"true"})
2492
3411
@dbus.service.signal(_interface, signature="os")
2493
3412
def ClientRemoved(self, objpath, name):
2494
3413
"D-Bus signal"
2495
3414
pass
2496
3415
3416
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3417
"true"})
2497
3418
@dbus.service.method(_interface, out_signature="ao")
2498
3419
def GetAllClients(self):
2499
3420
"D-Bus method"
2500
return dbus.Array(c.dbus_object_path
2501
for c in
2502
tcp_server.clients.itervalues())
2503
3421
return dbus.Array(c.dbus_object_path for c in
3422
tcp_server.clients.values())
3423
3424
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3425
"true"})
2504
3426
@dbus.service.method(_interface,
2505
3427
out_signature="a{oa{sv}}")
2506
3428
def GetAllClientsWithProperties(self):
2507
3429
"D-Bus method"
2508
3430
return dbus.Dictionary(
2509
((c.dbus_object_path, c.GetAll(""))
2510
for c in tcp_server.clients.itervalues()),
3431
{c.dbus_object_path: c.GetAll(
3432
"se.recompile.Mandos.Client")
3433
for c in tcp_server.clients.values()},
2511
3434
signature="oa{sv}")
2512
3435
2513
3436
@dbus.service.method(_interface, in_signature="o")
2514
3437
def RemoveClient(self, object_path):
2515
3438
"D-Bus method"
2516
for c in tcp_server.clients.itervalues():
3439
for c in tcp_server.clients.values():
2517
3440
if c.dbus_object_path == object_path:
2518
3441
del tcp_server.clients[c.name]
2519
3442
c.remove_from_connection()
2520
# Don't signal anything except ClientRemoved
3443
# Don't signal the disabling
2521
3444
c.disable(quiet=True)
2522
# Emit D-Bus signal
2523
self.ClientRemoved(object_path, c.name)
3445
# Emit D-Bus signal for removal
3446
self.client_removed_signal(c)
2524
3447
return
2525
3448
raise KeyError(object_path)
2526
3449
2527
3450
del _interface
2528
3451
3452
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3453
out_signature="a{oa{sa{sv}}}")
3454
def GetManagedObjects(self):
3455
"""D-Bus method"""
3456
return dbus.Dictionary(
3457
{client.dbus_object_path:
3458
dbus.Dictionary(
3459
{interface: client.GetAll(interface)
3460
for interface in
3461
client._get_all_interface_names()})
3462
for client in tcp_server.clients.values()})
3463
3464
def client_added_signal(self, client):
3465
"""Send the new standard signal and the old signal"""
3466
if use_dbus:
3467
# New standard signal
3468
self.InterfacesAdded(
3469
client.dbus_object_path,
3470
dbus.Dictionary(
3471
{interface: client.GetAll(interface)
3472
for interface in
3473
client._get_all_interface_names()}))
3474
# Old signal
3475
self.ClientAdded(client.dbus_object_path)
3476
3477
def client_removed_signal(self, client):
3478
"""Send the new standard signal and the old signal"""
3479
if use_dbus:
3480
# New standard signal
3481
self.InterfacesRemoved(
3482
client.dbus_object_path,
3483
client._get_all_interface_names())
3484
# Old signal
3485
self.ClientRemoved(client.dbus_object_path,
3486
client.name)
3487
2529
3488
mandos_dbus_service = MandosDBusService()
2530
3489
3490
# Save modules to variables to exempt the modules from being
3491
# unloaded before the function registered with atexit() is run.
3492
mp = multiprocessing
3493
wn = wnull
3494
2531
3495
def cleanup():
2532
3496
"Cleanup function; run on exit"
2533
service.cleanup()
2534
2535
multiprocessing.active_children()
3497
if zeroconf:
3498
service.cleanup()
3499
3500
mp.active_children()
3501
wn.close()
2536
3502
if not (tcp_server.clients or client_settings):
2537
3503
return
2538
3504
2539
3505
# Store client before exiting. Secrets are encrypted with key
2540
3506
# based on what config file has. If config file is
2541
3507
# removed/edited, old secret will thus be unrecovable.
2542
3508
clients = {}
2543
3509
with PGPEngine() as pgp:
2544
for client in tcp_server.clients.itervalues():
3510
for client in tcp_server.clients.values():
2545
3511
key = client_settings[client.name]["secret"]
2546
3512
client.encrypted_secret = pgp.encrypt(client.secret,
2547
3513
key)
2548
3514
client_dict = {}
2549
3515
2550
3516
# A list of attributes that can not be pickled
2551
3517
# + secret.
2552
exclude = set(("bus", "changedstate", "secret",
2553
"checker"))
2554
for name, typ in (inspect.getmembers
2555
(dbus.service.Object)):
3518
exclude = {"bus", "changedstate", "secret",
3519
"checker", "server_settings"}
3520
for name, typ in inspect.getmembers(dbus.service
3521
.Object):
2556
3522
exclude.add(name)
2557
3523
2558
3524
client_dict["encrypted_secret"] = (client
2559
3525
.encrypted_secret)
2560
3526
for attr in client.client_structure:
2561
3527
if attr not in exclude:
2562
3528
client_dict[attr] = getattr(client, attr)
2563
3529
2564
3530
clients[client.name] = client_dict
2565
3531
del client_settings[client.name]["secret"]
2566
3532
2567
3533
try:
2568
with (tempfile.NamedTemporaryFile
2569
(mode='wb', suffix=".pickle", prefix='clients-',
2570
dir=os.path.dirname(stored_state_path),
2571
delete=False)) as stored_state:
2572
pickle.dump((clients, client_settings), stored_state)
2573
tempname=stored_state.name
3534
with tempfile.NamedTemporaryFile(
3535
mode='wb',
3536
suffix=".pickle",
3537
prefix='clients-',
3538
dir=os.path.dirname(stored_state_path),
3539
delete=False) as stored_state:
3540
pickle.dump((clients, client_settings), stored_state,
3541
protocol=2)
3542
tempname = stored_state.name
2574
3543
os.rename(tempname, stored_state_path)
2575
3544
except (IOError, OSError) as e:
2576
3545
if not debug:
2579
3548
except NameError:
2580
3549
pass
2581
3550
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
2582
logger.warning("Could not save persistent state: {0}"
3551
logger.warning("Could not save persistent state: {}"
2583
3552
.format(os.strerror(e.errno)))
2584
3553
else:
2585
3554
logger.warning("Could not save persistent state:",
2586
3555
exc_info=e)
2587
raise e
2588
3556
raise
3557
2589
3558
# Delete all clients, and settings from config
2590
3559
while tcp_server.clients:
2591
3560
name, client = tcp_server.clients.popitem()
2592
3561
if use_dbus:
2593
3562
client.remove_from_connection()
2594
# Don't signal anything except ClientRemoved
3563
# Don't signal the disabling
2595
3564
client.disable(quiet=True)
3565
# Emit D-Bus signal for removal
2596
3566
if use_dbus:
2597
# Emit D-Bus signal
2598
mandos_dbus_service.ClientRemoved(client
2599
.dbus_object_path,
2600
client.name)
3567
mandos_dbus_service.client_removed_signal(client)
2601
3568
client_settings.clear()
2602
3569
2603
3570
atexit.register(cleanup)
2604
2605
for client in tcp_server.clients.itervalues():
3571
3572
for client in tcp_server.clients.values():
2606
3573
if use_dbus:
2607
# Emit D-Bus signal
2608
mandos_dbus_service.ClientAdded(client.dbus_object_path)
3574
# Emit D-Bus signal for adding
3575
mandos_dbus_service.client_added_signal(client)
2609
3576
# Need to initiate checking of clients
2610
3577
if client.enabled:
2611
3578
client.init_checker()
2612
3579
2613
3580
tcp_server.enable()
2614
3581
tcp_server.server_activate()
2615
3582
2616
3583
# Find out what port we got
2617
service.port = tcp_server.socket.getsockname()[1]
3584
if zeroconf:
3585
service.port = tcp_server.socket.getsockname()[1]
2618
3586
if use_ipv6:
2619
3587
logger.info("Now listening on address %r, port %d,"
2620
3588
" flowinfo %d, scope_id %d",
2622
3590
else: # IPv4
2623
3591
logger.info("Now listening on address %r, port %d",
2624
3592
*tcp_server.socket.getsockname())
2625
2626
#service.interface = tcp_server.socket.getsockname()[3]
2627
3593
3594
# service.interface = tcp_server.socket.getsockname()[3]
3595
2628
3596
try:
2629
# From the Avahi example code
2630
try:
2631
service.activate()
2632
except dbus.exceptions.DBusException as error:
2633
logger.critical("D-Bus Exception", exc_info=error)
2634
cleanup()
2635
sys.exit(1)
2636
# End of Avahi example code
2637
2638
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2639
lambda *args, **kwargs:
2640
(tcp_server.handle_request
2641
(*args[2:], **kwargs) or True))
2642
3597
if zeroconf:
3598
# From the Avahi example code
3599
try:
3600
service.activate()
3601
except dbus.exceptions.DBusException as error:
3602
logger.critical("D-Bus Exception", exc_info=error)
3603
cleanup()
3604
sys.exit(1)
3605
# End of Avahi example code
3606
3607
GLib.io_add_watch(
3608
GLib.IOChannel.unix_new(tcp_server.fileno()),
3609
GLib.PRIORITY_DEFAULT, GLib.IO_IN,
3610
lambda *args, **kwargs: (tcp_server.handle_request
3611
(*args[2:], **kwargs) or True))
3612
2643
3613
logger.debug("Starting main loop")
2644
3614
main_loop.run()
2645
3615
except AvahiError as error:
2654
3624
# Must run before the D-Bus bus name gets deregistered
2655
3625
cleanup()
2656
3626
3627
3628
def should_only_run_tests():
3629
parser = argparse.ArgumentParser(add_help=False)
3630
parser.add_argument("--check", action='store_true')
3631
args, unknown_args = parser.parse_known_args()
3632
run_tests = args.check
3633
if run_tests:
3634
# Remove --check argument from sys.argv
3635
sys.argv[1:] = unknown_args
3636
return run_tests
3637
3638
# Add all tests from doctest strings
3639
def load_tests(loader, tests, none):
3640
import doctest
3641
tests.addTests(doctest.DocTestSuite())
3642
return tests
3643
2657
3644
if __name__ == '__main__':
2658
main()
3645
try:
3646
if should_only_run_tests():
3647
# Call using ./mandos --check [--verbose]
3648
unittest.main()
3649
else:
3650
main()
3651
finally:
3652
logging.shutdown()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0