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- Committer: Teddy Hogeborn
- Date: 2009-01-23 23:17:42 UTC
- mto: (24.1.131 mandos) (237.4.2 mandos-pipe-ipc) (299.1.1 release) (300.1.1 release) (301.1.1 release)
- mto: This revision was merged to the branch mainline in revision 250.
- Revision ID: teddy@fukt.bsnet.se-20090123231742-joje60549e3qagy0
* mandos (peer_certificate): Handle NULL pointer from
"gnutls_certificate_get_peers" slightly
better.
(TCP_handler.handle): Added some extra debug output.
(MandosServer.GetAllClients,
MandosServer.GetAllClientsWithProperties,
MandosServer.RemoveClient): Added doc string.
"gnutls_certificate_get_peers" slightly
better.
(TCP_handler.handle): Added some extra debug output.
(MandosServer.GetAllClients,
MandosServer.GetAllClientsWithProperties,
MandosServer.RemoveClient): Added doc string.
- files added:
- initramfs-tools-hook-conf
- files removed:
- DBUS-API
- debian/source
- debian/tests
- debian/upstream
- dracut-module
- network-hooks.d
- plugin-helpers
- files modified:
- .bzrignore
added
removed
mandos
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
#
1
#!/usr/bin/python
2
# -*- mode: python; 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
# methods "add", "remove", "server_state_changed",
10
# "entry_group_state_changed", "cleanup", and "activate" in the
11
# "AvahiService" class, and some lines in "main".
12
#
9
# methods "add" and "remove" in the "AvahiService" class, the
10
# "server_state_changed" and "entry_group_state_changed" functions,
11
# and some lines in "main".
12
#
13
13
# Everything else is
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
14
# Copyright © 2008,2009 Teddy Hogeborn
15
# Copyright © 2008,2009 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
21
19
# the Free Software Foundation, either version 3 of the License, or
22
20
# (at your option) any later version.
23
21
#
24
# Mandos is distributed in the hope that it will be useful, but
25
# WITHOUT ANY WARRANTY; without even the implied warranty of
22
# This program is distributed in the hope that it will be useful,
23
# but WITHOUT ANY WARRANTY; without even the implied warranty of
26
24
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
27
25
# GNU General Public License for more details.
28
#
26
#
29
27
# You should have received a copy of the GNU General Public License
30
# along with Mandos. If not, see <http://www.gnu.org/licenses/>.
31
#
32
# Contact the authors at <mandos@recompile.se>.
33
#
34
35
from __future__ import (division, absolute_import, print_function,
36
unicode_literals)
37
38
try:
39
from future_builtins import *
40
except ImportError:
41
pass
42
43
try:
44
import SocketServer as socketserver
45
except ImportError:
46
import socketserver
28
# along with this program. If not, see
29
# <http://www.gnu.org/licenses/>.
30
#
31
# Contact the authors at <mandos@fukt.bsnet.se>.
32
#
33
34
from __future__ import division, with_statement, absolute_import
35
36
import SocketServer
47
37
import socket
48
import argparse
38
import optparse
49
39
import datetime
50
40
import errno
51
try:
52
import ConfigParser as configparser
53
except ImportError:
54
import configparser
41
import gnutls.crypto
42
import gnutls.connection
43
import gnutls.errors
44
import gnutls.library.functions
45
import gnutls.library.constants
46
import gnutls.library.types
47
import ConfigParser
55
48
import sys
56
49
import re
57
50
import os
58
51
import signal
52
from sets import Set
59
53
import subprocess
60
54
import atexit
61
55
import stat
62
56
import logging
63
57
import logging.handlers
64
58
import pwd
65
import contextlib
66
import struct
67
import fcntl
68
import functools
69
try:
70
import cPickle as pickle
71
except ImportError:
72
import pickle
73
import multiprocessing
74
import types
75
import binascii
76
import tempfile
77
import itertools
78
import collections
79
import codecs
80
import unittest
81
import random
82
import shlex
59
from contextlib import closing
83
60
84
61
import dbus
85
62
import dbus.service
86
import gi
87
from gi.repository import GLib
63
import gobject
64
import avahi
88
65
from dbus.mainloop.glib import DBusGMainLoop
89
66
import ctypes
90
67
import ctypes.util
91
import xml.dom.minidom
92
import inspect
93
94
if sys.version_info.major == 2:
95
__metaclass__ = type
96
str = unicode
97
98
# Add collections.abc.Callable if it does not exist
99
try:
100
collections.abc.Callable
101
except AttributeError:
102
class abc:
103
Callable = collections.Callable
104
collections.abc = abc
105
del abc
106
107
# Add shlex.quote if it does not exist
108
try:
109
shlex.quote
110
except AttributeError:
111
shlex.quote = re.escape
112
113
# Show warnings by default
114
if not sys.warnoptions:
115
import warnings
116
warnings.simplefilter("default")
117
118
# Try to find the value of SO_BINDTODEVICE:
119
try:
120
# This is where SO_BINDTODEVICE is in Python 3.3 (or 3.4?) and
121
# newer, and it is also the most natural place for it:
122
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
123
except AttributeError:
124
try:
125
# This is where SO_BINDTODEVICE was up to and including Python
126
# 2.6, and also 3.2:
127
from IN import SO_BINDTODEVICE
128
except ImportError:
129
# In Python 2.7 it seems to have been removed entirely.
130
# Try running the C preprocessor:
131
try:
132
cc = subprocess.Popen(["cc", "--language=c", "-E",
133
"/dev/stdin"],
134
stdin=subprocess.PIPE,
135
stdout=subprocess.PIPE)
136
stdout = cc.communicate(
137
"#include <sys/socket.h>\nSO_BINDTODEVICE\n")[0]
138
SO_BINDTODEVICE = int(stdout.splitlines()[-1])
139
except (OSError, ValueError, IndexError):
140
# No value found
141
SO_BINDTODEVICE = None
142
143
if sys.version_info < (3, 2):
144
configparser.Configparser = configparser.SafeConfigParser
145
146
version = "1.8.10"
147
stored_state_file = "clients.pickle"
148
149
logger = logging.getLogger()
150
logging.captureWarnings(True) # Show warnings via the logging system
151
syslogger = None
152
153
try:
154
if_nametoindex = ctypes.cdll.LoadLibrary(
155
ctypes.util.find_library("c")).if_nametoindex
156
except (OSError, AttributeError):
157
158
def if_nametoindex(interface):
159
"Get an interface index the hard way, i.e. using fcntl()"
160
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
161
with contextlib.closing(socket.socket()) as s:
162
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
163
struct.pack(b"16s16x", interface))
164
interface_index = struct.unpack("I", ifreq[16:20])[0]
165
return interface_index
166
167
168
def copy_function(func):
169
"""Make a copy of a function"""
170
if sys.version_info.major == 2:
171
return types.FunctionType(func.func_code,
172
func.func_globals,
173
func.func_name,
174
func.func_defaults,
175
func.func_closure)
176
else:
177
return types.FunctionType(func.__code__,
178
func.__globals__,
179
func.__name__,
180
func.__defaults__,
181
func.__closure__)
182
183
184
def initlogger(debug, level=logging.WARNING):
185
"""init logger and add loglevel"""
186
187
global syslogger
188
syslogger = (logging.handlers.SysLogHandler(
189
facility=logging.handlers.SysLogHandler.LOG_DAEMON,
190
address="/dev/log"))
191
syslogger.setFormatter(logging.Formatter
192
('Mandos [%(process)d]: %(levelname)s:'
193
' %(message)s'))
194
logger.addHandler(syslogger)
195
196
if debug:
197
console = logging.StreamHandler()
198
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
199
' [%(process)d]:'
200
' %(levelname)s:'
201
' %(message)s'))
202
logger.addHandler(console)
203
logger.setLevel(level)
204
205
206
class PGPError(Exception):
207
"""Exception if encryption/decryption fails"""
208
pass
209
210
211
class PGPEngine:
212
"""A simple class for OpenPGP symmetric encryption & decryption"""
213
214
def __init__(self):
215
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
216
self.gpg = "gpg"
217
try:
218
output = subprocess.check_output(["gpgconf"])
219
for line in output.splitlines():
220
name, text, path = line.split(b":")
221
if name == b"gpg":
222
self.gpg = path
223
break
224
except OSError as e:
225
if e.errno != errno.ENOENT:
226
raise
227
self.gnupgargs = ['--batch',
228
'--homedir', self.tempdir,
229
'--force-mdc',
230
'--quiet']
231
# Only GPG version 1 has the --no-use-agent option.
232
if self.gpg == b"gpg" or self.gpg.endswith(b"/gpg"):
233
self.gnupgargs.append("--no-use-agent")
234
235
def __enter__(self):
236
return self
237
238
def __exit__(self, exc_type, exc_value, traceback):
239
self._cleanup()
240
return False
241
242
def __del__(self):
243
self._cleanup()
244
245
def _cleanup(self):
246
if self.tempdir is not None:
247
# Delete contents of tempdir
248
for root, dirs, files in os.walk(self.tempdir,
249
topdown=False):
250
for filename in files:
251
os.remove(os.path.join(root, filename))
252
for dirname in dirs:
253
os.rmdir(os.path.join(root, dirname))
254
# Remove tempdir
255
os.rmdir(self.tempdir)
256
self.tempdir = None
257
258
def password_encode(self, password):
259
# Passphrase can not be empty and can not contain newlines or
260
# NUL bytes. So we prefix it and hex encode it.
261
encoded = b"mandos" + binascii.hexlify(password)
262
if len(encoded) > 2048:
263
# GnuPG can't handle long passwords, so encode differently
264
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
265
.replace(b"\n", b"\\n")
266
.replace(b"\0", b"\\x00"))
267
return encoded
268
269
def encrypt(self, data, password):
270
passphrase = self.password_encode(password)
271
with tempfile.NamedTemporaryFile(
272
dir=self.tempdir) as passfile:
273
passfile.write(passphrase)
274
passfile.flush()
275
proc = subprocess.Popen([self.gpg, '--symmetric',
276
'--passphrase-file',
277
passfile.name]
278
+ self.gnupgargs,
279
stdin=subprocess.PIPE,
280
stdout=subprocess.PIPE,
281
stderr=subprocess.PIPE)
282
ciphertext, err = proc.communicate(input=data)
283
if proc.returncode != 0:
284
raise PGPError(err)
285
return ciphertext
286
287
def decrypt(self, data, password):
288
passphrase = self.password_encode(password)
289
with tempfile.NamedTemporaryFile(
290
dir=self.tempdir) as passfile:
291
passfile.write(passphrase)
292
passfile.flush()
293
proc = subprocess.Popen([self.gpg, '--decrypt',
294
'--passphrase-file',
295
passfile.name]
296
+ self.gnupgargs,
297
stdin=subprocess.PIPE,
298
stdout=subprocess.PIPE,
299
stderr=subprocess.PIPE)
300
decrypted_plaintext, err = proc.communicate(input=data)
301
if proc.returncode != 0:
302
raise PGPError(err)
303
return decrypted_plaintext
304
305
306
# Pretend that we have an Avahi module
307
class avahi:
308
"""This isn't so much a class as it is a module-like namespace."""
309
IF_UNSPEC = -1 # avahi-common/address.h
310
PROTO_UNSPEC = -1 # avahi-common/address.h
311
PROTO_INET = 0 # avahi-common/address.h
312
PROTO_INET6 = 1 # avahi-common/address.h
313
DBUS_NAME = "org.freedesktop.Avahi"
314
DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"
315
DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"
316
DBUS_PATH_SERVER = "/"
317
318
@staticmethod
319
def string_array_to_txt_array(t):
320
return dbus.Array((dbus.ByteArray(s.encode("utf-8"))
321
for s in t), signature="ay")
322
ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h
323
ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h
324
ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h
325
SERVER_INVALID = 0 # avahi-common/defs.h
326
SERVER_REGISTERING = 1 # avahi-common/defs.h
327
SERVER_RUNNING = 2 # avahi-common/defs.h
328
SERVER_COLLISION = 3 # avahi-common/defs.h
329
SERVER_FAILURE = 4 # avahi-common/defs.h
330
68
69
version = "1.0.5"
70
71
logger = logging.Logger('mandos')
72
syslogger = (logging.handlers.SysLogHandler
73
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
74
address = "/dev/log"))
75
syslogger.setFormatter(logging.Formatter
76
('Mandos: %(levelname)s: %(message)s'))
77
logger.addHandler(syslogger)
78
79
console = logging.StreamHandler()
80
console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
81
' %(message)s'))
82
logger.addHandler(console)
331
83
332
84
class AvahiError(Exception):
333
85
def __init__(self, value, *args, **kwargs):
334
86
self.value = value
335
return super(AvahiError, self).__init__(value, *args,
336
**kwargs)
337
87
super(AvahiError, self).__init__(value, *args, **kwargs)
88
def __unicode__(self):
89
return unicode(repr(self.value))
338
90
339
91
class AvahiServiceError(AvahiError):
340
92
pass
341
93
342
343
94
class AvahiGroupError(AvahiError):
344
95
pass
345
96
346
97
347
class AvahiService:
98
class AvahiService(object):
348
99
"""An Avahi (Zeroconf) service.
349
350
100
Attributes:
351
101
interface: integer; avahi.IF_UNSPEC or an interface index.
352
102
Used to optionally bind to the specified interface.
353
103
name: string; Example: 'Mandos'
354
104
type: string; Example: '_mandos._tcp'.
355
See <https://www.iana.org/assignments/service-names-port-numbers>
105
See <http://www.dns-sd.org/ServiceTypes.html>
356
106
port: integer; what port to announce
357
107
TXT: list of strings; TXT record for the service
358
108
domain: string; Domain to publish on, default to .local if empty.
360
110
max_renames: integer; maximum number of renames
361
111
rename_count: integer; counter so we only rename after collisions
362
112
a sensible number of times
363
group: D-Bus Entry Group
364
server: D-Bus Server
365
bus: dbus.SystemBus()
366
113
"""
367
368
def __init__(self,
369
interface=avahi.IF_UNSPEC,
370
name=None,
371
servicetype=None,
372
port=None,
373
TXT=None,
374
domain="",
375
host="",
376
max_renames=32768,
377
protocol=avahi.PROTO_UNSPEC,
378
bus=None):
114
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
115
servicetype = None, port = None, TXT = None,
116
domain = "", host = "", max_renames = 32768):
379
117
self.interface = interface
380
118
self.name = name
381
119
self.type = servicetype
385
123
self.host = host
386
124
self.rename_count = 0
387
125
self.max_renames = max_renames
388
self.protocol = protocol
389
self.group = None # our entry group
390
self.server = None
391
self.bus = bus
392
self.entry_group_state_changed_match = None
393
394
def rename(self, remove=True):
126
def rename(self):
395
127
"""Derived from the Avahi example code"""
396
128
if self.rename_count >= self.max_renames:
397
logger.critical("No suitable Zeroconf service name found"
398
" after %i retries, exiting.",
129
logger.critical(u"No suitable Zeroconf service name found"
130
u" after %i retries, exiting.",
399
131
self.rename_count)
400
raise AvahiServiceError("Too many renames")
401
self.name = str(
402
self.server.GetAlternativeServiceName(self.name))
132
raise AvahiServiceError(u"Too many renames")
133
self.name = server.GetAlternativeServiceName(self.name)
134
logger.info(u"Changing Zeroconf service name to %r ...",
135
str(self.name))
136
syslogger.setFormatter(logging.Formatter
137
('Mandos (%s): %%(levelname)s:'
138
' %%(message)s' % self.name))
139
self.remove()
140
self.add()
403
141
self.rename_count += 1
404
logger.info("Changing Zeroconf service name to %r ...",
405
self.name)
406
if remove:
407
self.remove()
408
try:
409
self.add()
410
except dbus.exceptions.DBusException as error:
411
if (error.get_dbus_name()
412
== "org.freedesktop.Avahi.CollisionError"):
413
logger.info("Local Zeroconf service name collision.")
414
return self.rename(remove=False)
415
else:
416
logger.critical("D-Bus Exception", exc_info=error)
417
self.cleanup()
418
os._exit(1)
419
420
142
def remove(self):
421
143
"""Derived from the Avahi example code"""
422
if self.entry_group_state_changed_match is not None:
423
self.entry_group_state_changed_match.remove()
424
self.entry_group_state_changed_match = None
425
if self.group is not None:
426
self.group.Reset()
427
144
if group is not None:
145
group.Reset()
428
146
def add(self):
429
147
"""Derived from the Avahi example code"""
430
self.remove()
431
if self.group is None:
432
self.group = dbus.Interface(
433
self.bus.get_object(avahi.DBUS_NAME,
434
self.server.EntryGroupNew()),
435
avahi.DBUS_INTERFACE_ENTRY_GROUP)
436
self.entry_group_state_changed_match = (
437
self.group.connect_to_signal(
438
'StateChanged', self.entry_group_state_changed))
439
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
440
self.name, self.type)
441
self.group.AddService(
442
self.interface,
443
self.protocol,
444
dbus.UInt32(0), # flags
445
self.name, self.type,
446
self.domain, self.host,
447
dbus.UInt16(self.port),
448
avahi.string_array_to_txt_array(self.TXT))
449
self.group.Commit()
450
451
def entry_group_state_changed(self, state, error):
452
"""Derived from the Avahi example code"""
453
logger.debug("Avahi entry group state change: %i", state)
454
455
if state == avahi.ENTRY_GROUP_ESTABLISHED:
456
logger.debug("Zeroconf service established.")
457
elif state == avahi.ENTRY_GROUP_COLLISION:
458
logger.info("Zeroconf service name collision.")
459
self.rename()
460
elif state == avahi.ENTRY_GROUP_FAILURE:
461
logger.critical("Avahi: Error in group state changed %s",
462
str(error))
463
raise AvahiGroupError("State changed: {!s}".format(error))
464
465
def cleanup(self):
466
"""Derived from the Avahi example code"""
467
if self.group is not None:
468
try:
469
self.group.Free()
470
except (dbus.exceptions.UnknownMethodException,
471
dbus.exceptions.DBusException):
472
pass
473
self.group = None
474
self.remove()
475
476
def server_state_changed(self, state, error=None):
477
"""Derived from the Avahi example code"""
478
logger.debug("Avahi server state change: %i", state)
479
bad_states = {
480
avahi.SERVER_INVALID: "Zeroconf server invalid",
481
avahi.SERVER_REGISTERING: None,
482
avahi.SERVER_COLLISION: "Zeroconf server name collision",
483
avahi.SERVER_FAILURE: "Zeroconf server failure",
484
}
485
if state in bad_states:
486
if bad_states[state] is not None:
487
if error is None:
488
logger.error(bad_states[state])
489
else:
490
logger.error(bad_states[state] + ": %r", error)
491
self.cleanup()
492
elif state == avahi.SERVER_RUNNING:
493
try:
494
self.add()
495
except dbus.exceptions.DBusException as error:
496
if (error.get_dbus_name()
497
== "org.freedesktop.Avahi.CollisionError"):
498
logger.info("Local Zeroconf service name"
499
" collision.")
500
return self.rename(remove=False)
501
else:
502
logger.critical("D-Bus Exception", exc_info=error)
503
self.cleanup()
504
os._exit(1)
505
else:
506
if error is None:
507
logger.debug("Unknown state: %r", state)
508
else:
509
logger.debug("Unknown state: %r: %r", state, error)
510
511
def activate(self):
512
"""Derived from the Avahi example code"""
513
if self.server is None:
514
self.server = dbus.Interface(
515
self.bus.get_object(avahi.DBUS_NAME,
516
avahi.DBUS_PATH_SERVER,
517
follow_name_owner_changes=True),
518
avahi.DBUS_INTERFACE_SERVER)
519
self.server.connect_to_signal("StateChanged",
520
self.server_state_changed)
521
self.server_state_changed(self.server.GetState())
522
523
524
class AvahiServiceToSyslog(AvahiService):
525
def rename(self, *args, **kwargs):
526
"""Add the new name to the syslog messages"""
527
ret = super(AvahiServiceToSyslog, self).rename(*args, **kwargs)
528
syslogger.setFormatter(logging.Formatter(
529
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
530
.format(self.name)))
531
return ret
532
533
534
# Pretend that we have a GnuTLS module
535
class gnutls:
536
"""This isn't so much a class as it is a module-like namespace."""
537
538
library = ctypes.util.find_library("gnutls")
539
if library is None:
540
library = ctypes.util.find_library("gnutls-deb0")
541
_library = ctypes.cdll.LoadLibrary(library)
542
del library
543
544
# Unless otherwise indicated, the constants and types below are
545
# all from the gnutls/gnutls.h C header file.
546
547
# Constants
548
E_SUCCESS = 0
549
E_INTERRUPTED = -52
550
E_AGAIN = -28
551
CRT_OPENPGP = 2
552
CRT_RAWPK = 3
553
CLIENT = 2
554
SHUT_RDWR = 0
555
CRD_CERTIFICATE = 1
556
E_NO_CERTIFICATE_FOUND = -49
557
X509_FMT_DER = 0
558
NO_TICKETS = 1<<10
559
ENABLE_RAWPK = 1<<18
560
CTYPE_PEERS = 3
561
KEYID_USE_SHA256 = 1 # gnutls/x509.h
562
OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
563
564
# Types
565
class session_int(ctypes.Structure):
566
_fields_ = []
567
session_t = ctypes.POINTER(session_int)
568
569
class certificate_credentials_st(ctypes.Structure):
570
_fields_ = []
571
certificate_credentials_t = ctypes.POINTER(
572
certificate_credentials_st)
573
certificate_type_t = ctypes.c_int
574
575
class datum_t(ctypes.Structure):
576
_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
577
('size', ctypes.c_uint)]
578
579
class openpgp_crt_int(ctypes.Structure):
580
_fields_ = []
581
openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
582
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
583
log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
584
credentials_type_t = ctypes.c_int
585
transport_ptr_t = ctypes.c_void_p
586
close_request_t = ctypes.c_int
587
588
# Exceptions
589
class Error(Exception):
590
def __init__(self, message=None, code=None, args=()):
591
# Default usage is by a message string, but if a return
592
# code is passed, convert it to a string with
593
# gnutls.strerror()
594
self.code = code
595
if message is None and code is not None:
596
message = gnutls.strerror(code)
597
return super(gnutls.Error, self).__init__(
598
message, *args)
599
600
class CertificateSecurityError(Error):
601
pass
602
603
# Classes
604
class Credentials:
605
def __init__(self):
606
self._c_object = gnutls.certificate_credentials_t()
607
gnutls.certificate_allocate_credentials(
608
ctypes.byref(self._c_object))
609
self.type = gnutls.CRD_CERTIFICATE
610
611
def __del__(self):
612
gnutls.certificate_free_credentials(self._c_object)
613
614
class ClientSession:
615
def __init__(self, socket, credentials=None):
616
self._c_object = gnutls.session_t()
617
gnutls_flags = gnutls.CLIENT
618
if gnutls.check_version(b"3.5.6"):
619
gnutls_flags |= gnutls.NO_TICKETS
620
if gnutls.has_rawpk:
621
gnutls_flags |= gnutls.ENABLE_RAWPK
622
gnutls.init(ctypes.byref(self._c_object), gnutls_flags)
623
del gnutls_flags
624
gnutls.set_default_priority(self._c_object)
625
gnutls.transport_set_ptr(self._c_object, socket.fileno())
626
gnutls.handshake_set_private_extensions(self._c_object,
627
True)
628
self.socket = socket
629
if credentials is None:
630
credentials = gnutls.Credentials()
631
gnutls.credentials_set(self._c_object, credentials.type,
632
ctypes.cast(credentials._c_object,
633
ctypes.c_void_p))
634
self.credentials = credentials
635
636
def __del__(self):
637
gnutls.deinit(self._c_object)
638
639
def handshake(self):
640
return gnutls.handshake(self._c_object)
641
642
def send(self, data):
643
data = bytes(data)
644
data_len = len(data)
645
while data_len > 0:
646
data_len -= gnutls.record_send(self._c_object,
647
data[-data_len:],
648
data_len)
649
650
def bye(self):
651
return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
652
653
# Error handling functions
654
def _error_code(result):
655
"""A function to raise exceptions on errors, suitable
656
for the 'restype' attribute on ctypes functions"""
657
if result >= 0:
658
return result
659
if result == gnutls.E_NO_CERTIFICATE_FOUND:
660
raise gnutls.CertificateSecurityError(code=result)
661
raise gnutls.Error(code=result)
662
663
def _retry_on_error(result, func, arguments):
664
"""A function to retry on some errors, suitable
665
for the 'errcheck' attribute on ctypes functions"""
666
while result < 0:
667
if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
668
return _error_code(result)
669
result = func(*arguments)
670
return result
671
672
# Unless otherwise indicated, the function declarations below are
673
# all from the gnutls/gnutls.h C header file.
674
675
# Functions
676
priority_set_direct = _library.gnutls_priority_set_direct
677
priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
678
ctypes.POINTER(ctypes.c_char_p)]
679
priority_set_direct.restype = _error_code
680
681
init = _library.gnutls_init
682
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
683
init.restype = _error_code
684
685
set_default_priority = _library.gnutls_set_default_priority
686
set_default_priority.argtypes = [session_t]
687
set_default_priority.restype = _error_code
688
689
record_send = _library.gnutls_record_send
690
record_send.argtypes = [session_t, ctypes.c_void_p,
691
ctypes.c_size_t]
692
record_send.restype = ctypes.c_ssize_t
693
record_send.errcheck = _retry_on_error
694
695
certificate_allocate_credentials = (
696
_library.gnutls_certificate_allocate_credentials)
697
certificate_allocate_credentials.argtypes = [
698
ctypes.POINTER(certificate_credentials_t)]
699
certificate_allocate_credentials.restype = _error_code
700
701
certificate_free_credentials = (
702
_library.gnutls_certificate_free_credentials)
703
certificate_free_credentials.argtypes = [
704
certificate_credentials_t]
705
certificate_free_credentials.restype = None
706
707
handshake_set_private_extensions = (
708
_library.gnutls_handshake_set_private_extensions)
709
handshake_set_private_extensions.argtypes = [session_t,
710
ctypes.c_int]
711
handshake_set_private_extensions.restype = None
712
713
credentials_set = _library.gnutls_credentials_set
714
credentials_set.argtypes = [session_t, credentials_type_t,
715
ctypes.c_void_p]
716
credentials_set.restype = _error_code
717
718
strerror = _library.gnutls_strerror
719
strerror.argtypes = [ctypes.c_int]
720
strerror.restype = ctypes.c_char_p
721
722
certificate_type_get = _library.gnutls_certificate_type_get
723
certificate_type_get.argtypes = [session_t]
724
certificate_type_get.restype = _error_code
725
726
certificate_get_peers = _library.gnutls_certificate_get_peers
727
certificate_get_peers.argtypes = [session_t,
728
ctypes.POINTER(ctypes.c_uint)]
729
certificate_get_peers.restype = ctypes.POINTER(datum_t)
730
731
global_set_log_level = _library.gnutls_global_set_log_level
732
global_set_log_level.argtypes = [ctypes.c_int]
733
global_set_log_level.restype = None
734
735
global_set_log_function = _library.gnutls_global_set_log_function
736
global_set_log_function.argtypes = [log_func]
737
global_set_log_function.restype = None
738
739
deinit = _library.gnutls_deinit
740
deinit.argtypes = [session_t]
741
deinit.restype = None
742
743
handshake = _library.gnutls_handshake
744
handshake.argtypes = [session_t]
745
handshake.restype = _error_code
746
handshake.errcheck = _retry_on_error
747
748
transport_set_ptr = _library.gnutls_transport_set_ptr
749
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
750
transport_set_ptr.restype = None
751
752
bye = _library.gnutls_bye
753
bye.argtypes = [session_t, close_request_t]
754
bye.restype = _error_code
755
bye.errcheck = _retry_on_error
756
757
check_version = _library.gnutls_check_version
758
check_version.argtypes = [ctypes.c_char_p]
759
check_version.restype = ctypes.c_char_p
760
761
_need_version = b"3.3.0"
762
if check_version(_need_version) is None:
763
raise self.Error("Needs GnuTLS {} or later"
764
.format(_need_version))
765
766
_tls_rawpk_version = b"3.6.6"
767
has_rawpk = bool(check_version(_tls_rawpk_version))
768
769
if has_rawpk:
770
# Types
771
class pubkey_st(ctypes.Structure):
772
_fields = []
773
pubkey_t = ctypes.POINTER(pubkey_st)
774
775
x509_crt_fmt_t = ctypes.c_int
776
777
# All the function declarations below are from gnutls/abstract.h
778
pubkey_init = _library.gnutls_pubkey_init
779
pubkey_init.argtypes = [ctypes.POINTER(pubkey_t)]
780
pubkey_init.restype = _error_code
781
782
pubkey_import = _library.gnutls_pubkey_import
783
pubkey_import.argtypes = [pubkey_t, ctypes.POINTER(datum_t),
784
x509_crt_fmt_t]
785
pubkey_import.restype = _error_code
786
787
pubkey_get_key_id = _library.gnutls_pubkey_get_key_id
788
pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,
789
ctypes.POINTER(ctypes.c_ubyte),
790
ctypes.POINTER(ctypes.c_size_t)]
791
pubkey_get_key_id.restype = _error_code
792
793
pubkey_deinit = _library.gnutls_pubkey_deinit
794
pubkey_deinit.argtypes = [pubkey_t]
795
pubkey_deinit.restype = None
796
else:
797
# All the function declarations below are from gnutls/openpgp.h
798
799
openpgp_crt_init = _library.gnutls_openpgp_crt_init
800
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
801
openpgp_crt_init.restype = _error_code
802
803
openpgp_crt_import = _library.gnutls_openpgp_crt_import
804
openpgp_crt_import.argtypes = [openpgp_crt_t,
805
ctypes.POINTER(datum_t),
806
openpgp_crt_fmt_t]
807
openpgp_crt_import.restype = _error_code
808
809
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
810
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
811
ctypes.POINTER(ctypes.c_uint)]
812
openpgp_crt_verify_self.restype = _error_code
813
814
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
815
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
816
openpgp_crt_deinit.restype = None
817
818
openpgp_crt_get_fingerprint = (
819
_library.gnutls_openpgp_crt_get_fingerprint)
820
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
821
ctypes.c_void_p,
822
ctypes.POINTER(
823
ctypes.c_size_t)]
824
openpgp_crt_get_fingerprint.restype = _error_code
825
826
if check_version(b"3.6.4"):
827
certificate_type_get2 = _library.gnutls_certificate_type_get2
828
certificate_type_get2.argtypes = [session_t, ctypes.c_int]
829
certificate_type_get2.restype = _error_code
830
831
# Remove non-public functions
832
del _error_code, _retry_on_error
833
834
835
def call_pipe(connection, # : multiprocessing.Connection
836
func, *args, **kwargs):
837
"""This function is meant to be called by multiprocessing.Process
838
839
This function runs func(*args, **kwargs), and writes the resulting
840
return value on the provided multiprocessing.Connection.
841
"""
842
connection.send(func(*args, **kwargs))
843
connection.close()
844
845
846
class Client:
148
global group
149
if group is None:
150
group = dbus.Interface(bus.get_object
151
(avahi.DBUS_NAME,
152
server.EntryGroupNew()),
153
avahi.DBUS_INTERFACE_ENTRY_GROUP)
154
group.connect_to_signal('StateChanged',
155
entry_group_state_changed)
156
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
157
service.name, service.type)
158
group.AddService(
159
self.interface, # interface
160
avahi.PROTO_INET6, # protocol
161
dbus.UInt32(0), # flags
162
self.name, self.type,
163
self.domain, self.host,
164
dbus.UInt16(self.port),
165
avahi.string_array_to_txt_array(self.TXT))
166
group.Commit()
167
168
# From the Avahi example code:
169
group = None # our entry group
170
# End of Avahi example code
171
172
173
def _datetime_to_dbus(dt, variant_level=0):
174
"""Convert a UTC datetime.datetime() to a D-Bus type."""
175
return dbus.String(dt.isoformat(), variant_level=variant_level)
176
177
178
class Client(dbus.service.Object):
847
179
"""A representation of a client host served by this server.
848
849
180
Attributes:
850
approved: bool(); 'None' if not yet approved/disapproved
851
approval_delay: datetime.timedelta(); Time to wait for approval
852
approval_duration: datetime.timedelta(); Duration of one approval
853
checker: multiprocessing.Process(); a running checker process used
854
to see if the client lives. 'None' if no process is
855
running.
856
checker_callback_tag: a GLib event source tag, or None
857
checker_command: string; External command which is run to check
858
if client lives. %() expansions are done at
859
runtime with vars(self) as dict, so that for
860
instance %(name)s can be used in the command.
861
checker_initiator_tag: a GLib event source tag, or None
181
name: string; from the config file, used in log messages and
182
D-Bus identifiers
183
fingerprint: string (40 or 32 hexadecimal digits); used to
184
uniquely identify the client
185
secret: bytestring; sent verbatim (over TLS) to client
186
host: string; available for use by the checker command
862
187
created: datetime.datetime(); (UTC) object creation
863
client_structure: Object describing what attributes a client has
864
and is used for storing the client at exit
865
current_checker_command: string; current running checker_command
866
disable_initiator_tag: a GLib event source tag, or None
188
last_enabled: datetime.datetime(); (UTC)
867
189
enabled: bool()
868
fingerprint: string (40 or 32 hexadecimal digits); used to
869
uniquely identify an OpenPGP client
870
key_id: string (64 hexadecimal digits); used to uniquely identify
871
a client using raw public keys
872
host: string; available for use by the checker command
873
interval: datetime.timedelta(); How often to start a new checker
874
last_approval_request: datetime.datetime(); (UTC) or None
875
190
last_checked_ok: datetime.datetime(); (UTC) or None
876
last_checker_status: integer between 0 and 255 reflecting exit
877
status of last checker. -1 reflects crashed
878
checker, -2 means no checker completed yet.
879
last_checker_signal: The signal which killed the last checker, if
880
last_checker_status is -1
881
last_enabled: datetime.datetime(); (UTC) or None
882
name: string; from the config file, used in log messages and
883
D-Bus identifiers
884
secret: bytestring; sent verbatim (over TLS) to client
885
191
timeout: datetime.timedelta(); How long from last_checked_ok
886
until this client is disabled
887
extended_timeout: extra long timeout when secret has been sent
888
runtime_expansions: Allowed attributes for runtime expansion.
889
expires: datetime.datetime(); time (UTC) when a client will be
890
disabled, or None
891
server_settings: The server_settings dict from main()
192
until this client is invalid
193
interval: datetime.timedelta(); How often to start a new checker
194
disable_hook: If set, called by disable() as disable_hook(self)
195
checker: subprocess.Popen(); a running checker process used
196
to see if the client lives.
197
'None' if no process is running.
198
checker_initiator_tag: a gobject event source tag, or None
199
disable_initiator_tag: - '' -
200
checker_callback_tag: - '' -
201
checker_command: string; External command which is run to check if
202
client lives. %() expansions are done at
203
runtime with vars(self) as dict, so that for
204
instance %(name)s can be used in the command.
205
use_dbus: bool(); Whether to provide D-Bus interface and signals
206
dbus_object_path: dbus.ObjectPath ; only set if self.use_dbus
892
207
"""
893
894
runtime_expansions = ("approval_delay", "approval_duration",
895
"created", "enabled", "expires", "key_id",
896
"fingerprint", "host", "interval",
897
"last_approval_request", "last_checked_ok",
898
"last_enabled", "name", "timeout")
899
client_defaults = {
900
"timeout": "PT5M",
901
"extended_timeout": "PT15M",
902
"interval": "PT2M",
903
"checker": "fping -q -- %%(host)s",
904
"host": "",
905
"approval_delay": "PT0S",
906
"approval_duration": "PT1S",
907
"approved_by_default": "True",
908
"enabled": "True",
909
}
910
911
@staticmethod
912
def config_parser(config):
913
"""Construct a new dict of client settings of this form:
914
{ client_name: {setting_name: value, ...}, ...}
915
with exceptions for any special settings as defined above.
916
NOTE: Must be a pure function. Must return the same result
917
value given the same arguments.
918
"""
919
settings = {}
920
for client_name in config.sections():
921
section = dict(config.items(client_name))
922
client = settings[client_name] = {}
923
924
client["host"] = section["host"]
925
# Reformat values from string types to Python types
926
client["approved_by_default"] = config.getboolean(
927
client_name, "approved_by_default")
928
client["enabled"] = config.getboolean(client_name,
929
"enabled")
930
931
# Uppercase and remove spaces from key_id and fingerprint
932
# for later comparison purposes with return value from the
933
# key_id() and fingerprint() functions
934
client["key_id"] = (section.get("key_id", "").upper()
935
.replace(" ", ""))
936
client["fingerprint"] = (section["fingerprint"].upper()
937
.replace(" ", ""))
938
if "secret" in section:
939
client["secret"] = codecs.decode(section["secret"]
940
.encode("utf-8"),
941
"base64")
942
elif "secfile" in section:
943
with open(os.path.expanduser(os.path.expandvars
944
(section["secfile"])),
945
"rb") as secfile:
946
client["secret"] = secfile.read()
947
else:
948
raise TypeError("No secret or secfile for section {}"
949
.format(section))
950
client["timeout"] = string_to_delta(section["timeout"])
951
client["extended_timeout"] = string_to_delta(
952
section["extended_timeout"])
953
client["interval"] = string_to_delta(section["interval"])
954
client["approval_delay"] = string_to_delta(
955
section["approval_delay"])
956
client["approval_duration"] = string_to_delta(
957
section["approval_duration"])
958
client["checker_command"] = section["checker"]
959
client["last_approval_request"] = None
960
client["last_checked_ok"] = None
961
client["last_checker_status"] = -2
962
963
return settings
964
965
def __init__(self, settings, name=None, server_settings=None):
208
def timeout_milliseconds(self):
209
"Return the 'timeout' attribute in milliseconds"
210
return ((self.timeout.days * 24 * 60 * 60 * 1000)
211
+ (self.timeout.seconds * 1000)
212
+ (self.timeout.microseconds // 1000))
213
214
def interval_milliseconds(self):
215
"Return the 'interval' attribute in milliseconds"
216
return ((self.interval.days * 24 * 60 * 60 * 1000)
217
+ (self.interval.seconds * 1000)
218
+ (self.interval.microseconds // 1000))
219
220
def __init__(self, name = None, disable_hook=None, config=None,
221
use_dbus=True):
222
"""Note: the 'checker' key in 'config' sets the
223
'checker_command' attribute and *not* the 'checker'
224
attribute."""
966
225
self.name = name
967
if server_settings is None:
968
server_settings = {}
969
self.server_settings = server_settings
970
# adding all client settings
971
for setting, value in settings.items():
972
setattr(self, setting, value)
973
974
if self.enabled:
975
if not hasattr(self, "last_enabled"):
976
self.last_enabled = datetime.datetime.utcnow()
977
if not hasattr(self, "expires"):
978
self.expires = (datetime.datetime.utcnow()
979
+ self.timeout)
226
if config is None:
227
config = {}
228
logger.debug(u"Creating client %r", self.name)
229
self.use_dbus = False # During __init__
230
# Uppercase and remove spaces from fingerprint for later
231
# comparison purposes with return value from the fingerprint()
232
# function
233
self.fingerprint = (config["fingerprint"].upper()
234
.replace(u" ", u""))
235
logger.debug(u" Fingerprint: %s", self.fingerprint)
236
if "secret" in config:
237
self.secret = config["secret"].decode(u"base64")
238
elif "secfile" in config:
239
with closing(open(os.path.expanduser
240
(os.path.expandvars
241
(config["secfile"])))) as secfile:
242
self.secret = secfile.read()
980
243
else:
981
self.last_enabled = None
982
self.expires = None
983
984
logger.debug("Creating client %r", self.name)
985
logger.debug(" Key ID: %s", self.key_id)
986
logger.debug(" Fingerprint: %s", self.fingerprint)
987
self.created = settings.get("created",
988
datetime.datetime.utcnow())
989
990
# attributes specific for this server instance
244
raise TypeError(u"No secret or secfile for client %s"
245
% self.name)
246
self.host = config.get("host", "")
247
self.created = datetime.datetime.utcnow()
248
self.enabled = False
249
self.last_enabled = None
250
self.last_checked_ok = None
251
self.timeout = string_to_delta(config["timeout"])
252
self.interval = string_to_delta(config["interval"])
253
self.disable_hook = disable_hook
991
254
self.checker = None
992
255
self.checker_initiator_tag = None
993
256
self.disable_initiator_tag = None
994
257
self.checker_callback_tag = None
995
self.current_checker_command = None
996
self.approved = None
997
self.approvals_pending = 0
998
self.changedstate = multiprocessing_manager.Condition(
999
multiprocessing_manager.Lock())
1000
self.client_structure = [attr
1001
for attr in self.__dict__.keys()
1002
if not attr.startswith("_")]
1003
self.client_structure.append("client_structure")
1004
1005
for name, t in inspect.getmembers(
1006
type(self), lambda obj: isinstance(obj, property)):
1007
if not name.startswith("_"):
1008
self.client_structure.append(name)
1009
1010
# Send notice to process children that client state has changed
1011
def send_changedstate(self):
1012
with self.changedstate:
1013
self.changedstate.notify_all()
1014
258
self.checker_command = config["checker"]
259
self.last_connect = None
260
# Only now, when this client is initialized, can it show up on
261
# the D-Bus
262
self.use_dbus = use_dbus
263
if self.use_dbus:
264
self.dbus_object_path = (dbus.ObjectPath
265
("/clients/"
266
+ self.name.replace(".", "_")))
267
dbus.service.Object.__init__(self, bus,
268
self.dbus_object_path)
269
1015
270
def enable(self):
1016
271
"""Start this client's checker and timeout hooks"""
1017
if getattr(self, "enabled", False):
1018
# Already enabled
1019
return
1020
self.expires = datetime.datetime.utcnow() + self.timeout
1021
self.enabled = True
1022
272
self.last_enabled = datetime.datetime.utcnow()
1023
self.init_checker()
1024
self.send_changedstate()
1025
1026
def disable(self, quiet=True):
1027
"""Disable this client."""
1028
if not getattr(self, "enabled", False):
1029
return False
1030
if not quiet:
1031
logger.info("Disabling client %s", self.name)
1032
if getattr(self, "disable_initiator_tag", None) is not None:
1033
GLib.source_remove(self.disable_initiator_tag)
1034
self.disable_initiator_tag = None
1035
self.expires = None
1036
if getattr(self, "checker_initiator_tag", None) is not None:
1037
GLib.source_remove(self.checker_initiator_tag)
1038
self.checker_initiator_tag = None
1039
self.stop_checker()
1040
self.enabled = False
1041
if not quiet:
1042
self.send_changedstate()
1043
# Do not run this again if called by a GLib.timeout_add
1044
return False
1045
1046
def __del__(self):
1047
self.disable()
1048
1049
def init_checker(self):
1050
273
# Schedule a new checker to be started an 'interval' from now,
1051
274
# and every interval from then on.
1052
if self.checker_initiator_tag is not None:
1053
GLib.source_remove(self.checker_initiator_tag)
1054
self.checker_initiator_tag = GLib.timeout_add(
1055
random.randrange(int(self.interval.total_seconds() * 1000
1056
+ 1)),
1057
self.start_checker)
275
self.checker_initiator_tag = (gobject.timeout_add
276
(self.interval_milliseconds(),
277
self.start_checker))
278
# Also start a new checker *right now*.
279
self.start_checker()
1058
280
# Schedule a disable() when 'timeout' has passed
1059
if self.disable_initiator_tag is not None:
1060
GLib.source_remove(self.disable_initiator_tag)
1061
self.disable_initiator_tag = GLib.timeout_add(
1062
int(self.timeout.total_seconds() * 1000), self.disable)
1063
# Also start a new checker *right now*.
1064
self.start_checker()
1065
1066
def checker_callback(self, source, condition, connection,
1067
command):
281
self.disable_initiator_tag = (gobject.timeout_add
282
(self.timeout_milliseconds(),
283
self.disable))
284
self.enabled = True
285
if self.use_dbus:
286
# Emit D-Bus signals
287
self.PropertyChanged(dbus.String(u"enabled"),
288
dbus.Boolean(True, variant_level=1))
289
self.PropertyChanged(dbus.String(u"last_enabled"),
290
(_datetime_to_dbus(self.last_enabled,
291
variant_level=1)))
292
293
def disable(self):
294
"""Disable this client."""
295
if not getattr(self, "enabled", False):
296
return False
297
logger.info(u"Disabling client %s", self.name)
298
if getattr(self, "disable_initiator_tag", False):
299
gobject.source_remove(self.disable_initiator_tag)
300
self.disable_initiator_tag = None
301
if getattr(self, "checker_initiator_tag", False):
302
gobject.source_remove(self.checker_initiator_tag)
303
self.checker_initiator_tag = None
304
self.stop_checker()
305
if self.disable_hook:
306
self.disable_hook(self)
307
self.enabled = False
308
if self.use_dbus:
309
# Emit D-Bus signal
310
self.PropertyChanged(dbus.String(u"enabled"),
311
dbus.Boolean(False, variant_level=1))
312
# Do not run this again if called by a gobject.timeout_add
313
return False
314
315
def __del__(self):
316
self.disable_hook = None
317
self.disable()
318
319
def checker_callback(self, pid, condition, command):
1068
320
"""The checker has completed, so take appropriate actions."""
1069
# Read return code from connection (see call_pipe)
1070
returncode = connection.recv()
1071
connection.close()
1072
if self.checker is not None:
1073
self.checker.join()
1074
321
self.checker_callback_tag = None
1075
322
self.checker = None
1076
1077
if returncode >= 0:
1078
self.last_checker_status = returncode
1079
self.last_checker_signal = None
1080
if self.last_checker_status == 0:
1081
logger.info("Checker for %(name)s succeeded",
323
if self.use_dbus:
324
# Emit D-Bus signal
325
self.PropertyChanged(dbus.String(u"checker_running"),
326
dbus.Boolean(False, variant_level=1))
327
if os.WIFEXITED(condition):
328
exitstatus = os.WEXITSTATUS(condition)
329
if exitstatus == 0:
330
logger.info(u"Checker for %(name)s succeeded",
1082
331
vars(self))
1083
332
self.checked_ok()
1084
333
else:
1085
logger.info("Checker for %(name)s failed", vars(self))
334
logger.info(u"Checker for %(name)s failed",
335
vars(self))
336
if self.use_dbus:
337
# Emit D-Bus signal
338
self.CheckerCompleted(dbus.Int16(exitstatus),
339
dbus.Int64(condition),
340
dbus.String(command))
1086
341
else:
1087
self.last_checker_status = -1
1088
self.last_checker_signal = -returncode
1089
logger.warning("Checker for %(name)s crashed?",
342
logger.warning(u"Checker for %(name)s crashed?",
1090
343
vars(self))
1091
return False
1092
344
if self.use_dbus:
345
# Emit D-Bus signal
346
self.CheckerCompleted(dbus.Int16(-1),
347
dbus.Int64(condition),
348
dbus.String(command))
349
1093
350
def checked_ok(self):
1094
"""Assert that the client has been seen, alive and well."""
351
"""Bump up the timeout for this client.
352
This should only be called when the client has been seen,
353
alive and well.
354
"""
1095
355
self.last_checked_ok = datetime.datetime.utcnow()
1096
self.last_checker_status = 0
1097
self.last_checker_signal = None
1098
self.bump_timeout()
1099
1100
def bump_timeout(self, timeout=None):
1101
"""Bump up the timeout for this client."""
1102
if timeout is None:
1103
timeout = self.timeout
1104
if self.disable_initiator_tag is not None:
1105
GLib.source_remove(self.disable_initiator_tag)
1106
self.disable_initiator_tag = None
1107
if getattr(self, "enabled", False):
1108
self.disable_initiator_tag = GLib.timeout_add(
1109
int(timeout.total_seconds() * 1000), self.disable)
1110
self.expires = datetime.datetime.utcnow() + timeout
1111
1112
def need_approval(self):
1113
self.last_approval_request = datetime.datetime.utcnow()
1114
356
gobject.source_remove(self.disable_initiator_tag)
357
self.disable_initiator_tag = (gobject.timeout_add
358
(self.timeout_milliseconds(),
359
self.disable))
360
if self.use_dbus:
361
# Emit D-Bus signal
362
self.PropertyChanged(
363
dbus.String(u"last_checked_ok"),
364
(_datetime_to_dbus(self.last_checked_ok,
365
variant_level=1)))
366
1115
367
def start_checker(self):
1116
368
"""Start a new checker subprocess if one is not running.
1117
1118
369
If a checker already exists, leave it running and do
1119
370
nothing."""
1120
371
# The reason for not killing a running checker is that if we
1121
# did that, and if a checker (for some reason) started running
1122
# slowly and taking more than 'interval' time, then the client
1123
# would inevitably timeout, since no checker would get a
1124
# chance to run to completion. If we instead leave running
372
# did that, then if a checker (for some reason) started
373
# running slowly and taking more than 'interval' time, the
374
# client would inevitably timeout, since no checker would get
375
# a chance to run to completion. If we instead leave running
1125
376
# checkers alone, the checker would have to take more time
1126
# than 'timeout' for the client to be disabled, which is as it
1127
# should be.
1128
1129
if self.checker is not None and not self.checker.is_alive():
1130
logger.warning("Checker was not alive; joining")
1131
self.checker.join()
1132
self.checker = None
1133
# Start a new checker if needed
377
# than 'timeout' for the client to be declared invalid, which
378
# is as it should be.
1134
379
if self.checker is None:
1135
# Escape attributes for the shell
1136
escaped_attrs = {
1137
attr: shlex.quote(str(getattr(self, attr)))
1138
for attr in self.runtime_expansions}
1139
try:
1140
command = self.checker_command % escaped_attrs
1141
except TypeError as error:
1142
logger.error('Could not format string "%s"',
1143
self.checker_command,
1144
exc_info=error)
1145
return True # Try again later
1146
self.current_checker_command = command
1147
logger.info("Starting checker %r for %s", command,
1148
self.name)
1149
# We don't need to redirect stdout and stderr, since
1150
# in normal mode, that is already done by daemon(),
1151
# and in debug mode we don't want to. (Stdin is
1152
# always replaced by /dev/null.)
1153
# The exception is when not debugging but nevertheless
1154
# running in the foreground; use the previously
1155
# created wnull.
1156
popen_args = {"close_fds": True,
1157
"shell": True,
1158
"cwd": "/"}
1159
if (not self.server_settings["debug"]
1160
and self.server_settings["foreground"]):
1161
popen_args.update({"stdout": wnull,
1162
"stderr": wnull})
1163
pipe = multiprocessing.Pipe(duplex=False)
1164
self.checker = multiprocessing.Process(
1165
target=call_pipe,
1166
args=(pipe[1], subprocess.call, command),
1167
kwargs=popen_args)
1168
self.checker.start()
1169
self.checker_callback_tag = GLib.io_add_watch(
1170
GLib.IOChannel.unix_new(pipe[0].fileno()),
1171
GLib.PRIORITY_DEFAULT, GLib.IO_IN,
1172
self.checker_callback, pipe[0], command)
1173
# Re-run this periodically if run by GLib.timeout_add
380
try:
381
# In case checker_command has exactly one % operator
382
command = self.checker_command % self.host
383
except TypeError:
384
# Escape attributes for the shell
385
escaped_attrs = dict((key, re.escape(str(val)))
386
for key, val in
387
vars(self).iteritems())
388
try:
389
command = self.checker_command % escaped_attrs
390
except TypeError, error:
391
logger.error(u'Could not format string "%s":'
392
u' %s', self.checker_command, error)
393
return True # Try again later
394
try:
395
logger.info(u"Starting checker %r for %s",
396
command, self.name)
397
# We don't need to redirect stdout and stderr, since
398
# in normal mode, that is already done by daemon(),
399
# and in debug mode we don't want to. (Stdin is
400
# always replaced by /dev/null.)
401
self.checker = subprocess.Popen(command,
402
close_fds=True,
403
shell=True, cwd="/")
404
if self.use_dbus:
405
# Emit D-Bus signal
406
self.CheckerStarted(command)
407
self.PropertyChanged(
408
dbus.String("checker_running"),
409
dbus.Boolean(True, variant_level=1))
410
self.checker_callback_tag = (gobject.child_watch_add
411
(self.checker.pid,
412
self.checker_callback,
413
data=command))
414
except OSError, error:
415
logger.error(u"Failed to start subprocess: %s",
416
error)
417
# Re-run this periodically if run by gobject.timeout_add
1174
418
return True
1175
419
1176
420
def stop_checker(self):
1177
421
"""Force the checker process, if any, to stop."""
1178
422
if self.checker_callback_tag:
1179
GLib.source_remove(self.checker_callback_tag)
423
gobject.source_remove(self.checker_callback_tag)
1180
424
self.checker_callback_tag = None
1181
425
if getattr(self, "checker", None) is None:
1182
426
return
1183
logger.debug("Stopping checker for %(name)s", vars(self))
1184
self.checker.terminate()
427
logger.debug(u"Stopping checker for %(name)s", vars(self))
428
try:
429
os.kill(self.checker.pid, signal.SIGTERM)
430
#os.sleep(0.5)
431
#if self.checker.poll() is None:
432
# os.kill(self.checker.pid, signal.SIGKILL)
433
except OSError, error:
434
if error.errno != errno.ESRCH: # No such process
435
raise
1185
436
self.checker = None
1186
1187
1188
def dbus_service_property(dbus_interface,
1189
signature="v",
1190
access="readwrite",
1191
byte_arrays=False):
1192
"""Decorators for marking methods of a DBusObjectWithProperties to
1193
become properties on the D-Bus.
1194
1195
The decorated method will be called with no arguments by "Get"
1196
and with one argument by "Set".
1197
1198
The parameters, where they are supported, are the same as
1199
dbus.service.method, except there is only "signature", since the
1200
type from Get() and the type sent to Set() is the same.
1201
"""
1202
# Encoding deeply encoded byte arrays is not supported yet by the
1203
# "Set" method, so we fail early here:
1204
if byte_arrays and signature != "ay":
1205
raise ValueError("Byte arrays not supported for non-'ay'"
1206
" signature {!r}".format(signature))
1207
1208
def decorator(func):
1209
func._dbus_is_property = True
1210
func._dbus_interface = dbus_interface
1211
func._dbus_signature = signature
1212
func._dbus_access = access
1213
func._dbus_name = func.__name__
1214
if func._dbus_name.endswith("_dbus_property"):
1215
func._dbus_name = func._dbus_name[:-14]
1216
func._dbus_get_args_options = {'byte_arrays': byte_arrays}
1217
return func
1218
1219
return decorator
1220
1221
1222
def dbus_interface_annotations(dbus_interface):
1223
"""Decorator for marking functions returning interface annotations
1224
1225
Usage:
1226
1227
@dbus_interface_annotations("org.example.Interface")
1228
def _foo(self): # Function name does not matter
1229
return {"org.freedesktop.DBus.Deprecated": "true",
1230
"org.freedesktop.DBus.Property.EmitsChangedSignal":
1231
"false"}
1232
"""
1233
1234
def decorator(func):
1235
func._dbus_is_interface = True
1236
func._dbus_interface = dbus_interface
1237
func._dbus_name = dbus_interface
1238
return func
1239
1240
return decorator
1241
1242
1243
def dbus_annotations(annotations):
1244
"""Decorator to annotate D-Bus methods, signals or properties
1245
Usage:
1246
1247
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
1248
"org.freedesktop.DBus.Property."
1249
"EmitsChangedSignal": "false"})
1250
@dbus_service_property("org.example.Interface", signature="b",
1251
access="r")
1252
def Property_dbus_property(self):
1253
return dbus.Boolean(False)
1254
1255
See also the DBusObjectWithAnnotations class.
1256
"""
1257
1258
def decorator(func):
1259
func._dbus_annotations = annotations
1260
return func
1261
1262
return decorator
1263
1264
1265
class DBusPropertyException(dbus.exceptions.DBusException):
1266
"""A base class for D-Bus property-related exceptions
1267
"""
1268
pass
1269
1270
1271
class DBusPropertyAccessException(DBusPropertyException):
1272
"""A property's access permissions disallows an operation.
1273
"""
1274
pass
1275
1276
1277
class DBusPropertyNotFound(DBusPropertyException):
1278
"""An attempt was made to access a non-existing property.
1279
"""
1280
pass
1281
1282
1283
class DBusObjectWithAnnotations(dbus.service.Object):
1284
"""A D-Bus object with annotations.
1285
1286
Classes inheriting from this can use the dbus_annotations
1287
decorator to add annotations to methods or signals.
1288
"""
1289
1290
@staticmethod
1291
def _is_dbus_thing(thing):
1292
"""Returns a function testing if an attribute is a D-Bus thing
1293
1294
If called like _is_dbus_thing("method") it returns a function
1295
suitable for use as predicate to inspect.getmembers().
1296
"""
1297
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
1298
False)
1299
1300
def _get_all_dbus_things(self, thing):
1301
"""Returns a generator of (name, attribute) pairs
1302
"""
1303
return ((getattr(athing.__get__(self), "_dbus_name", name),
1304
athing.__get__(self))
1305
for cls in self.__class__.__mro__
1306
for name, athing in
1307
inspect.getmembers(cls, self._is_dbus_thing(thing)))
1308
1309
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1310
out_signature="s",
1311
path_keyword='object_path',
1312
connection_keyword='connection')
1313
def Introspect(self, object_path, connection):
1314
"""Overloading of standard D-Bus method.
1315
1316
Inserts annotation tags on methods and signals.
1317
"""
1318
xmlstring = dbus.service.Object.Introspect(self, object_path,
1319
connection)
1320
try:
1321
document = xml.dom.minidom.parseString(xmlstring)
1322
1323
for if_tag in document.getElementsByTagName("interface"):
1324
# Add annotation tags
1325
for typ in ("method", "signal"):
1326
for tag in if_tag.getElementsByTagName(typ):
1327
annots = dict()
1328
for name, prop in (self.
1329
_get_all_dbus_things(typ)):
1330
if (name == tag.getAttribute("name")
1331
and prop._dbus_interface
1332
== if_tag.getAttribute("name")):
1333
annots.update(getattr(
1334
prop, "_dbus_annotations", {}))
1335
for name, value in annots.items():
1336
ann_tag = document.createElement(
1337
"annotation")
1338
ann_tag.setAttribute("name", name)
1339
ann_tag.setAttribute("value", value)
1340
tag.appendChild(ann_tag)
1341
# Add interface annotation tags
1342
for annotation, value in dict(
1343
itertools.chain.from_iterable(
1344
annotations().items()
1345
for name, annotations
1346
in self._get_all_dbus_things("interface")
1347
if name == if_tag.getAttribute("name")
1348
)).items():
1349
ann_tag = document.createElement("annotation")
1350
ann_tag.setAttribute("name", annotation)
1351
ann_tag.setAttribute("value", value)
1352
if_tag.appendChild(ann_tag)
1353
# Fix argument name for the Introspect method itself
1354
if (if_tag.getAttribute("name")
1355
== dbus.INTROSPECTABLE_IFACE):
1356
for cn in if_tag.getElementsByTagName("method"):
1357
if cn.getAttribute("name") == "Introspect":
1358
for arg in cn.getElementsByTagName("arg"):
1359
if (arg.getAttribute("direction")
1360
== "out"):
1361
arg.setAttribute("name",
1362
"xml_data")
1363
xmlstring = document.toxml("utf-8")
1364
document.unlink()
1365
except (AttributeError, xml.dom.DOMException,
1366
xml.parsers.expat.ExpatError) as error:
1367
logger.error("Failed to override Introspection method",
1368
exc_info=error)
1369
return xmlstring
1370
1371
1372
class DBusObjectWithProperties(DBusObjectWithAnnotations):
1373
"""A D-Bus object with properties.
1374
1375
Classes inheriting from this can use the dbus_service_property
1376
decorator to expose methods as D-Bus properties. It exposes the
1377
standard Get(), Set(), and GetAll() methods on the D-Bus.
1378
"""
1379
1380
def _get_dbus_property(self, interface_name, property_name):
1381
"""Returns a bound method if one exists which is a D-Bus
1382
property with the specified name and interface.
1383
"""
1384
for cls in self.__class__.__mro__:
1385
for name, value in inspect.getmembers(
1386
cls, self._is_dbus_thing("property")):
1387
if (value._dbus_name == property_name
1388
and value._dbus_interface == interface_name):
1389
return value.__get__(self)
1390
1391
# No such property
1392
raise DBusPropertyNotFound("{}:{}.{}".format(
1393
self.dbus_object_path, interface_name, property_name))
1394
1395
@classmethod
1396
def _get_all_interface_names(cls):
1397
"""Get a sequence of all interfaces supported by an object"""
1398
return (name for name in set(getattr(getattr(x, attr),
1399
"_dbus_interface", None)
1400
for x in (inspect.getmro(cls))
1401
for attr in dir(x))
1402
if name is not None)
1403
1404
@dbus.service.method(dbus.PROPERTIES_IFACE,
1405
in_signature="ss",
1406
out_signature="v")
1407
def Get(self, interface_name, property_name):
1408
"""Standard D-Bus property Get() method, see D-Bus standard.
1409
"""
1410
prop = self._get_dbus_property(interface_name, property_name)
1411
if prop._dbus_access == "write":
1412
raise DBusPropertyAccessException(property_name)
1413
value = prop()
1414
if not hasattr(value, "variant_level"):
1415
return value
1416
return type(value)(value, variant_level=value.variant_level+1)
1417
1418
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
1419
def Set(self, interface_name, property_name, value):
1420
"""Standard D-Bus property Set() method, see D-Bus standard.
1421
"""
1422
prop = self._get_dbus_property(interface_name, property_name)
1423
if prop._dbus_access == "read":
1424
raise DBusPropertyAccessException(property_name)
1425
if prop._dbus_get_args_options["byte_arrays"]:
1426
# The byte_arrays option is not supported yet on
1427
# signatures other than "ay".
1428
if prop._dbus_signature != "ay":
1429
raise ValueError("Byte arrays not supported for non-"
1430
"'ay' signature {!r}"
1431
.format(prop._dbus_signature))
1432
value = dbus.ByteArray(bytes(value))
1433
prop(value)
1434
1435
@dbus.service.method(dbus.PROPERTIES_IFACE,
1436
in_signature="s",
1437
out_signature="a{sv}")
1438
def GetAll(self, interface_name):
1439
"""Standard D-Bus property GetAll() method, see D-Bus
1440
standard.
1441
1442
Note: Will not include properties with access="write".
1443
"""
1444
properties = {}
1445
for name, prop in self._get_all_dbus_things("property"):
1446
if (interface_name
1447
and interface_name != prop._dbus_interface):
1448
# Interface non-empty but did not match
1449
continue
1450
# Ignore write-only properties
1451
if prop._dbus_access == "write":
1452
continue
1453
value = prop()
1454
if not hasattr(value, "variant_level"):
1455
properties[name] = value
1456
continue
1457
properties[name] = type(value)(
1458
value, variant_level=value.variant_level + 1)
1459
return dbus.Dictionary(properties, signature="sv")
1460
1461
@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
1462
def PropertiesChanged(self, interface_name, changed_properties,
1463
invalidated_properties):
1464
"""Standard D-Bus PropertiesChanged() signal, see D-Bus
1465
standard.
1466
"""
1467
pass
1468
1469
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1470
out_signature="s",
1471
path_keyword='object_path',
1472
connection_keyword='connection')
1473
def Introspect(self, object_path, connection):
1474
"""Overloading of standard D-Bus method.
1475
1476
Inserts property tags and interface annotation tags.
1477
"""
1478
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1479
object_path,
1480
connection)
1481
try:
1482
document = xml.dom.minidom.parseString(xmlstring)
1483
1484
def make_tag(document, name, prop):
1485
e = document.createElement("property")
1486
e.setAttribute("name", name)
1487
e.setAttribute("type", prop._dbus_signature)
1488
e.setAttribute("access", prop._dbus_access)
1489
return e
1490
1491
for if_tag in document.getElementsByTagName("interface"):
1492
# Add property tags
1493
for tag in (make_tag(document, name, prop)
1494
for name, prop
1495
in self._get_all_dbus_things("property")
1496
if prop._dbus_interface
1497
== if_tag.getAttribute("name")):
1498
if_tag.appendChild(tag)
1499
# Add annotation tags for properties
1500
for tag in if_tag.getElementsByTagName("property"):
1501
annots = dict()
1502
for name, prop in self._get_all_dbus_things(
1503
"property"):
1504
if (name == tag.getAttribute("name")
1505
and prop._dbus_interface
1506
== if_tag.getAttribute("name")):
1507
annots.update(getattr(
1508
prop, "_dbus_annotations", {}))
1509
for name, value in annots.items():
1510
ann_tag = document.createElement(
1511
"annotation")
1512
ann_tag.setAttribute("name", name)
1513
ann_tag.setAttribute("value", value)
1514
tag.appendChild(ann_tag)
1515
# Add the names to the return values for the
1516
# "org.freedesktop.DBus.Properties" methods
1517
if (if_tag.getAttribute("name")
1518
== "org.freedesktop.DBus.Properties"):
1519
for cn in if_tag.getElementsByTagName("method"):
1520
if cn.getAttribute("name") == "Get":
1521
for arg in cn.getElementsByTagName("arg"):
1522
if (arg.getAttribute("direction")
1523
== "out"):
1524
arg.setAttribute("name", "value")
1525
elif cn.getAttribute("name") == "GetAll":
1526
for arg in cn.getElementsByTagName("arg"):
1527
if (arg.getAttribute("direction")
1528
== "out"):
1529
arg.setAttribute("name", "props")
1530
xmlstring = document.toxml("utf-8")
1531
document.unlink()
1532
except (AttributeError, xml.dom.DOMException,
1533
xml.parsers.expat.ExpatError) as error:
1534
logger.error("Failed to override Introspection method",
1535
exc_info=error)
1536
return xmlstring
1537
1538
1539
try:
1540
dbus.OBJECT_MANAGER_IFACE
1541
except AttributeError:
1542
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1543
1544
1545
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1546
"""A D-Bus object with an ObjectManager.
1547
1548
Classes inheriting from this exposes the standard
1549
GetManagedObjects call and the InterfacesAdded and
1550
InterfacesRemoved signals on the standard
1551
"org.freedesktop.DBus.ObjectManager" interface.
1552
1553
Note: No signals are sent automatically; they must be sent
1554
manually.
1555
"""
1556
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1557
out_signature="a{oa{sa{sv}}}")
1558
def GetManagedObjects(self):
1559
"""This function must be overridden"""
1560
raise NotImplementedError()
1561
1562
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1563
signature="oa{sa{sv}}")
1564
def InterfacesAdded(self, object_path, interfaces_and_properties):
1565
pass
1566
1567
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1568
def InterfacesRemoved(self, object_path, interfaces):
1569
pass
1570
1571
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1572
out_signature="s",
1573
path_keyword='object_path',
1574
connection_keyword='connection')
1575
def Introspect(self, object_path, connection):
1576
"""Overloading of standard D-Bus method.
1577
1578
Override return argument name of GetManagedObjects to be
1579
"objpath_interfaces_and_properties"
1580
"""
1581
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1582
object_path,
1583
connection)
1584
try:
1585
document = xml.dom.minidom.parseString(xmlstring)
1586
1587
for if_tag in document.getElementsByTagName("interface"):
1588
# Fix argument name for the GetManagedObjects method
1589
if (if_tag.getAttribute("name")
1590
== dbus.OBJECT_MANAGER_IFACE):
1591
for cn in if_tag.getElementsByTagName("method"):
1592
if (cn.getAttribute("name")
1593
== "GetManagedObjects"):
1594
for arg in cn.getElementsByTagName("arg"):
1595
if (arg.getAttribute("direction")
1596
== "out"):
1597
arg.setAttribute(
1598
"name",
1599
"objpath_interfaces"
1600
"_and_properties")
1601
xmlstring = document.toxml("utf-8")
1602
document.unlink()
1603
except (AttributeError, xml.dom.DOMException,
1604
xml.parsers.expat.ExpatError) as error:
1605
logger.error("Failed to override Introspection method",
1606
exc_info=error)
1607
return xmlstring
1608
1609
1610
def datetime_to_dbus(dt, variant_level=0):
1611
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1612
if dt is None:
1613
return dbus.String("", variant_level=variant_level)
1614
return dbus.String(dt.isoformat(), variant_level=variant_level)
1615
1616
1617
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1618
"""A class decorator; applied to a subclass of
1619
dbus.service.Object, it will add alternate D-Bus attributes with
1620
interface names according to the "alt_interface_names" mapping.
1621
Usage:
1622
1623
@alternate_dbus_interfaces({"org.example.Interface":
1624
"net.example.AlternateInterface"})
1625
class SampleDBusObject(dbus.service.Object):
1626
@dbus.service.method("org.example.Interface")
1627
def SampleDBusMethod():
1628
pass
1629
1630
The above "SampleDBusMethod" on "SampleDBusObject" will be
1631
reachable via two interfaces: "org.example.Interface" and
1632
"net.example.AlternateInterface", the latter of which will have
1633
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1634
"true", unless "deprecate" is passed with a False value.
1635
1636
This works for methods and signals, and also for D-Bus properties
1637
(from DBusObjectWithProperties) and interfaces (from the
1638
dbus_interface_annotations decorator).
1639
"""
1640
1641
def wrapper(cls):
1642
for orig_interface_name, alt_interface_name in (
1643
alt_interface_names.items()):
1644
attr = {}
1645
interface_names = set()
1646
# Go though all attributes of the class
1647
for attrname, attribute in inspect.getmembers(cls):
1648
# Ignore non-D-Bus attributes, and D-Bus attributes
1649
# with the wrong interface name
1650
if (not hasattr(attribute, "_dbus_interface")
1651
or not attribute._dbus_interface.startswith(
1652
orig_interface_name)):
1653
continue
1654
# Create an alternate D-Bus interface name based on
1655
# the current name
1656
alt_interface = attribute._dbus_interface.replace(
1657
orig_interface_name, alt_interface_name)
1658
interface_names.add(alt_interface)
1659
# Is this a D-Bus signal?
1660
if getattr(attribute, "_dbus_is_signal", False):
1661
# Extract the original non-method undecorated
1662
# function by black magic
1663
if sys.version_info.major == 2:
1664
nonmethod_func = (dict(
1665
zip(attribute.func_code.co_freevars,
1666
attribute.__closure__))
1667
["func"].cell_contents)
1668
else:
1669
nonmethod_func = (dict(
1670
zip(attribute.__code__.co_freevars,
1671
attribute.__closure__))
1672
["func"].cell_contents)
1673
# Create a new, but exactly alike, function
1674
# object, and decorate it to be a new D-Bus signal
1675
# with the alternate D-Bus interface name
1676
new_function = copy_function(nonmethod_func)
1677
new_function = (dbus.service.signal(
1678
alt_interface,
1679
attribute._dbus_signature)(new_function))
1680
# Copy annotations, if any
1681
try:
1682
new_function._dbus_annotations = dict(
1683
attribute._dbus_annotations)
1684
except AttributeError:
1685
pass
1686
1687
# Define a creator of a function to call both the
1688
# original and alternate functions, so both the
1689
# original and alternate signals gets sent when
1690
# the function is called
1691
def fixscope(func1, func2):
1692
"""This function is a scope container to pass
1693
func1 and func2 to the "call_both" function
1694
outside of its arguments"""
1695
1696
@functools.wraps(func2)
1697
def call_both(*args, **kwargs):
1698
"""This function will emit two D-Bus
1699
signals by calling func1 and func2"""
1700
func1(*args, **kwargs)
1701
func2(*args, **kwargs)
1702
# Make wrapper function look like a D-Bus
1703
# signal
1704
for name, attr in inspect.getmembers(func2):
1705
if name.startswith("_dbus_"):
1706
setattr(call_both, name, attr)
1707
1708
return call_both
1709
# Create the "call_both" function and add it to
1710
# the class
1711
attr[attrname] = fixscope(attribute, new_function)
1712
# Is this a D-Bus method?
1713
elif getattr(attribute, "_dbus_is_method", False):
1714
# Create a new, but exactly alike, function
1715
# object. Decorate it to be a new D-Bus method
1716
# with the alternate D-Bus interface name. Add it
1717
# to the class.
1718
attr[attrname] = (
1719
dbus.service.method(
1720
alt_interface,
1721
attribute._dbus_in_signature,
1722
attribute._dbus_out_signature)
1723
(copy_function(attribute)))
1724
# Copy annotations, if any
1725
try:
1726
attr[attrname]._dbus_annotations = dict(
1727
attribute._dbus_annotations)
1728
except AttributeError:
1729
pass
1730
# Is this a D-Bus property?
1731
elif getattr(attribute, "_dbus_is_property", False):
1732
# Create a new, but exactly alike, function
1733
# object, and decorate it to be a new D-Bus
1734
# property with the alternate D-Bus interface
1735
# name. Add it to the class.
1736
attr[attrname] = (dbus_service_property(
1737
alt_interface, attribute._dbus_signature,
1738
attribute._dbus_access,
1739
attribute._dbus_get_args_options
1740
["byte_arrays"])
1741
(copy_function(attribute)))
1742
# Copy annotations, if any
1743
try:
1744
attr[attrname]._dbus_annotations = dict(
1745
attribute._dbus_annotations)
1746
except AttributeError:
1747
pass
1748
# Is this a D-Bus interface?
1749
elif getattr(attribute, "_dbus_is_interface", False):
1750
# Create a new, but exactly alike, function
1751
# object. Decorate it to be a new D-Bus interface
1752
# with the alternate D-Bus interface name. Add it
1753
# to the class.
1754
attr[attrname] = (
1755
dbus_interface_annotations(alt_interface)
1756
(copy_function(attribute)))
1757
if deprecate:
1758
# Deprecate all alternate interfaces
1759
iname = "_AlternateDBusNames_interface_annotation{}"
1760
for interface_name in interface_names:
1761
1762
@dbus_interface_annotations(interface_name)
1763
def func(self):
1764
return {"org.freedesktop.DBus.Deprecated":
1765
"true"}
1766
# Find an unused name
1767
for aname in (iname.format(i)
1768
for i in itertools.count()):
1769
if aname not in attr:
1770
attr[aname] = func
1771
break
1772
if interface_names:
1773
# Replace the class with a new subclass of it with
1774
# methods, signals, etc. as created above.
1775
if sys.version_info.major == 2:
1776
cls = type(b"{}Alternate".format(cls.__name__),
1777
(cls, ), attr)
1778
else:
1779
cls = type("{}Alternate".format(cls.__name__),
1780
(cls, ), attr)
1781
return cls
1782
1783
return wrapper
1784
1785
1786
@alternate_dbus_interfaces({"se.recompile.Mandos":
1787
"se.bsnet.fukt.Mandos"})
1788
class ClientDBus(Client, DBusObjectWithProperties):
1789
"""A Client class using D-Bus
1790
1791
Attributes:
1792
dbus_object_path: dbus.ObjectPath
1793
bus: dbus.SystemBus()
1794
"""
1795
1796
runtime_expansions = (Client.runtime_expansions
1797
+ ("dbus_object_path", ))
1798
1799
_interface = "se.recompile.Mandos.Client"
1800
1801
# dbus.service.Object doesn't use super(), so we can't either.
1802
1803
def __init__(self, bus=None, *args, **kwargs):
1804
self.bus = bus
1805
Client.__init__(self, *args, **kwargs)
1806
# Only now, when this client is initialized, can it show up on
1807
# the D-Bus
1808
client_object_name = str(self.name).translate(
1809
{ord("."): ord("_"),
1810
ord("-"): ord("_")})
1811
self.dbus_object_path = dbus.ObjectPath(
1812
"/clients/" + client_object_name)
1813
DBusObjectWithProperties.__init__(self, self.bus,
1814
self.dbus_object_path)
1815
1816
def notifychangeproperty(transform_func, dbus_name,
1817
type_func=lambda x: x,
1818
variant_level=1,
1819
invalidate_only=False,
1820
_interface=_interface):
1821
""" Modify a variable so that it's a property which announces
1822
its changes to DBus.
1823
1824
transform_fun: Function that takes a value and a variant_level
1825
and transforms it to a D-Bus type.
1826
dbus_name: D-Bus name of the variable
1827
type_func: Function that transform the value before sending it
1828
to the D-Bus. Default: no transform
1829
variant_level: D-Bus variant level. Default: 1
1830
"""
1831
attrname = "_{}".format(dbus_name)
1832
1833
def setter(self, value):
1834
if hasattr(self, "dbus_object_path"):
1835
if (not hasattr(self, attrname) or
1836
type_func(getattr(self, attrname, None))
1837
!= type_func(value)):
1838
if invalidate_only:
1839
self.PropertiesChanged(
1840
_interface, dbus.Dictionary(),
1841
dbus.Array((dbus_name, )))
1842
else:
1843
dbus_value = transform_func(
1844
type_func(value),
1845
variant_level=variant_level)
1846
self.PropertyChanged(dbus.String(dbus_name),
1847
dbus_value)
1848
self.PropertiesChanged(
1849
_interface,
1850
dbus.Dictionary({dbus.String(dbus_name):
1851
dbus_value}),
1852
dbus.Array())
1853
setattr(self, attrname, value)
1854
1855
return property(lambda self: getattr(self, attrname), setter)
1856
1857
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1858
approvals_pending = notifychangeproperty(dbus.Boolean,
1859
"ApprovalPending",
1860
type_func=bool)
1861
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1862
last_enabled = notifychangeproperty(datetime_to_dbus,
1863
"LastEnabled")
1864
checker = notifychangeproperty(
1865
dbus.Boolean, "CheckerRunning",
1866
type_func=lambda checker: checker is not None)
1867
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1868
"LastCheckedOK")
1869
last_checker_status = notifychangeproperty(dbus.Int16,
1870
"LastCheckerStatus")
1871
last_approval_request = notifychangeproperty(
1872
datetime_to_dbus, "LastApprovalRequest")
1873
approved_by_default = notifychangeproperty(dbus.Boolean,
1874
"ApprovedByDefault")
1875
approval_delay = notifychangeproperty(
1876
dbus.UInt64, "ApprovalDelay",
1877
type_func=lambda td: td.total_seconds() * 1000)
1878
approval_duration = notifychangeproperty(
1879
dbus.UInt64, "ApprovalDuration",
1880
type_func=lambda td: td.total_seconds() * 1000)
1881
host = notifychangeproperty(dbus.String, "Host")
1882
timeout = notifychangeproperty(
1883
dbus.UInt64, "Timeout",
1884
type_func=lambda td: td.total_seconds() * 1000)
1885
extended_timeout = notifychangeproperty(
1886
dbus.UInt64, "ExtendedTimeout",
1887
type_func=lambda td: td.total_seconds() * 1000)
1888
interval = notifychangeproperty(
1889
dbus.UInt64, "Interval",
1890
type_func=lambda td: td.total_seconds() * 1000)
1891
checker_command = notifychangeproperty(dbus.String, "Checker")
1892
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1893
invalidate_only=True)
1894
1895
del notifychangeproperty
1896
1897
def __del__(self, *args, **kwargs):
1898
try:
1899
self.remove_from_connection()
1900
except LookupError:
1901
pass
1902
if hasattr(DBusObjectWithProperties, "__del__"):
1903
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1904
Client.__del__(self, *args, **kwargs)
1905
1906
def checker_callback(self, source, condition,
1907
connection, command, *args, **kwargs):
1908
ret = Client.checker_callback(self, source, condition,
1909
connection, command, *args,
1910
**kwargs)
1911
exitstatus = self.last_checker_status
1912
if exitstatus >= 0:
1913
# Emit D-Bus signal
1914
self.CheckerCompleted(dbus.Int16(exitstatus),
1915
# This is specific to GNU libC
1916
dbus.Int64(exitstatus << 8),
1917
dbus.String(command))
437
if self.use_dbus:
438
self.PropertyChanged(dbus.String(u"checker_running"),
439
dbus.Boolean(False, variant_level=1))
440
441
def still_valid(self):
442
"""Has the timeout not yet passed for this client?"""
443
if not getattr(self, "enabled", False):
444
return False
445
now = datetime.datetime.utcnow()
446
if self.last_checked_ok is None:
447
return now < (self.created + self.timeout)
1918
448
else:
1919
# Emit D-Bus signal
1920
self.CheckerCompleted(dbus.Int16(-1),
1921
dbus.Int64(
1922
# This is specific to GNU libC
1923
(exitstatus << 8)
1924
| self.last_checker_signal),
1925
dbus.String(command))
1926
return ret
1927
1928
def start_checker(self, *args, **kwargs):
1929
old_checker_pid = getattr(self.checker, "pid", None)
1930
r = Client.start_checker(self, *args, **kwargs)
1931
# Only if new checker process was started
1932
if (self.checker is not None
1933
and old_checker_pid != self.checker.pid):
1934
# Emit D-Bus signal
1935
self.CheckerStarted(self.current_checker_command)
1936
return r
1937
1938
def _reset_approved(self):
1939
self.approved = None
1940
return False
1941
1942
def approve(self, value=True):
1943
self.approved = value
1944
GLib.timeout_add(int(self.approval_duration.total_seconds()
1945
* 1000), self._reset_approved)
1946
self.send_changedstate()
1947
1948
# D-Bus methods, signals & properties
1949
1950
# Interfaces
1951
1952
# Signals
1953
449
return now < (self.last_checked_ok + self.timeout)
450
451
## D-Bus methods & signals
452
_interface = u"se.bsnet.fukt.Mandos.Client"
453
454
# CheckedOK - method
455
CheckedOK = dbus.service.method(_interface)(checked_ok)
456
CheckedOK.__name__ = "CheckedOK"
457
1954
458
# CheckerCompleted - signal
1955
459
@dbus.service.signal(_interface, signature="nxs")
1956
460
def CheckerCompleted(self, exitcode, waitstatus, command):
1957
461
"D-Bus signal"
1958
462
pass
1959
463
1960
464
# CheckerStarted - signal
1961
465
@dbus.service.signal(_interface, signature="s")
1962
466
def CheckerStarted(self, command):
1963
467
"D-Bus signal"
1964
468
pass
1965
469
470
# GetAllProperties - method
471
@dbus.service.method(_interface, out_signature="a{sv}")
472
def GetAllProperties(self):
473
"D-Bus method"
474
return dbus.Dictionary({
475
dbus.String("name"):
476
dbus.String(self.name, variant_level=1),
477
dbus.String("fingerprint"):
478
dbus.String(self.fingerprint, variant_level=1),
479
dbus.String("host"):
480
dbus.String(self.host, variant_level=1),
481
dbus.String("created"):
482
_datetime_to_dbus(self.created, variant_level=1),
483
dbus.String("last_enabled"):
484
(_datetime_to_dbus(self.last_enabled,
485
variant_level=1)
486
if self.last_enabled is not None
487
else dbus.Boolean(False, variant_level=1)),
488
dbus.String("enabled"):
489
dbus.Boolean(self.enabled, variant_level=1),
490
dbus.String("last_checked_ok"):
491
(_datetime_to_dbus(self.last_checked_ok,
492
variant_level=1)
493
if self.last_checked_ok is not None
494
else dbus.Boolean (False, variant_level=1)),
495
dbus.String("timeout"):
496
dbus.UInt64(self.timeout_milliseconds(),
497
variant_level=1),
498
dbus.String("interval"):
499
dbus.UInt64(self.interval_milliseconds(),
500
variant_level=1),
501
dbus.String("checker"):
502
dbus.String(self.checker_command,
503
variant_level=1),
504
dbus.String("checker_running"):
505
dbus.Boolean(self.checker is not None,
506
variant_level=1),
507
dbus.String("object_path"):
508
dbus.ObjectPath(self.dbus_object_path,
509
variant_level=1)
510
}, signature="sv")
511
512
# IsStillValid - method
513
IsStillValid = (dbus.service.method(_interface, out_signature="b")
514
(still_valid))
515
IsStillValid.__name__ = "IsStillValid"
516
1966
517
# PropertyChanged - signal
1967
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1968
518
@dbus.service.signal(_interface, signature="sv")
1969
519
def PropertyChanged(self, property, value):
1970
520
"D-Bus signal"
1971
521
pass
1972
1973
# GotSecret - signal
1974
@dbus.service.signal(_interface)
1975
def GotSecret(self):
1976
"""D-Bus signal
1977
Is sent after a successful transfer of secret from the Mandos
1978
server to mandos-client
1979
"""
1980
pass
1981
1982
# Rejected - signal
1983
@dbus.service.signal(_interface, signature="s")
1984
def Rejected(self, reason):
1985
"D-Bus signal"
1986
pass
1987
1988
# NeedApproval - signal
1989
@dbus.service.signal(_interface, signature="tb")
1990
def NeedApproval(self, timeout, default):
1991
"D-Bus signal"
1992
return self.need_approval()
1993
1994
# Methods
1995
1996
# Approve - method
1997
@dbus.service.method(_interface, in_signature="b")
1998
def Approve(self, value):
1999
self.approve(value)
2000
2001
# CheckedOK - method
2002
@dbus.service.method(_interface)
2003
def CheckedOK(self):
2004
self.checked_ok()
2005
522
523
# SetChecker - method
524
@dbus.service.method(_interface, in_signature="s")
525
def SetChecker(self, checker):
526
"D-Bus setter method"
527
self.checker_command = checker
528
# Emit D-Bus signal
529
self.PropertyChanged(dbus.String(u"checker"),
530
dbus.String(self.checker_command,
531
variant_level=1))
532
533
# SetHost - method
534
@dbus.service.method(_interface, in_signature="s")
535
def SetHost(self, host):
536
"D-Bus setter method"
537
self.host = host
538
# Emit D-Bus signal
539
self.PropertyChanged(dbus.String(u"host"),
540
dbus.String(self.host, variant_level=1))
541
542
# SetInterval - method
543
@dbus.service.method(_interface, in_signature="t")
544
def SetInterval(self, milliseconds):
545
self.interval = datetime.timedelta(0, 0, 0, milliseconds)
546
# Emit D-Bus signal
547
self.PropertyChanged(dbus.String(u"interval"),
548
(dbus.UInt64(self.interval_milliseconds(),
549
variant_level=1)))
550
551
# SetSecret - method
552
@dbus.service.method(_interface, in_signature="ay",
553
byte_arrays=True)
554
def SetSecret(self, secret):
555
"D-Bus setter method"
556
self.secret = str(secret)
557
558
# SetTimeout - method
559
@dbus.service.method(_interface, in_signature="t")
560
def SetTimeout(self, milliseconds):
561
self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
562
# Emit D-Bus signal
563
self.PropertyChanged(dbus.String(u"timeout"),
564
(dbus.UInt64(self.timeout_milliseconds(),
565
variant_level=1)))
566
2006
567
# Enable - method
2007
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
2008
@dbus.service.method(_interface)
2009
def Enable(self):
2010
"D-Bus method"
2011
self.enable()
2012
568
Enable = dbus.service.method(_interface)(enable)
569
Enable.__name__ = "Enable"
570
2013
571
# StartChecker - method
2014
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
2015
572
@dbus.service.method(_interface)
2016
573
def StartChecker(self):
2017
574
"D-Bus method"
2018
575
self.start_checker()
2019
576
2020
577
# Disable - method
2021
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
2022
578
@dbus.service.method(_interface)
2023
579
def Disable(self):
2024
580
"D-Bus method"
2025
581
self.disable()
2026
582
2027
583
# StopChecker - method
2028
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
2029
@dbus.service.method(_interface)
2030
def StopChecker(self):
2031
self.stop_checker()
2032
2033
# Properties
2034
2035
# ApprovalPending - property
2036
@dbus_service_property(_interface, signature="b", access="read")
2037
def ApprovalPending_dbus_property(self):
2038
return dbus.Boolean(bool(self.approvals_pending))
2039
2040
# ApprovedByDefault - property
2041
@dbus_service_property(_interface,
2042
signature="b",
2043
access="readwrite")
2044
def ApprovedByDefault_dbus_property(self, value=None):
2045
if value is None: # get
2046
return dbus.Boolean(self.approved_by_default)
2047
self.approved_by_default = bool(value)
2048
2049
# ApprovalDelay - property
2050
@dbus_service_property(_interface,
2051
signature="t",
2052
access="readwrite")
2053
def ApprovalDelay_dbus_property(self, value=None):
2054
if value is None: # get
2055
return dbus.UInt64(self.approval_delay.total_seconds()
2056
* 1000)
2057
self.approval_delay = datetime.timedelta(0, 0, 0, value)
2058
2059
# ApprovalDuration - property
2060
@dbus_service_property(_interface,
2061
signature="t",
2062
access="readwrite")
2063
def ApprovalDuration_dbus_property(self, value=None):
2064
if value is None: # get
2065
return dbus.UInt64(self.approval_duration.total_seconds()
2066
* 1000)
2067
self.approval_duration = datetime.timedelta(0, 0, 0, value)
2068
2069
# Name - property
2070
@dbus_annotations(
2071
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2072
@dbus_service_property(_interface, signature="s", access="read")
2073
def Name_dbus_property(self):
2074
return dbus.String(self.name)
2075
2076
# KeyID - property
2077
@dbus_annotations(
2078
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2079
@dbus_service_property(_interface, signature="s", access="read")
2080
def KeyID_dbus_property(self):
2081
return dbus.String(self.key_id)
2082
2083
# Fingerprint - property
2084
@dbus_annotations(
2085
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2086
@dbus_service_property(_interface, signature="s", access="read")
2087
def Fingerprint_dbus_property(self):
2088
return dbus.String(self.fingerprint)
2089
2090
# Host - property
2091
@dbus_service_property(_interface,
2092
signature="s",
2093
access="readwrite")
2094
def Host_dbus_property(self, value=None):
2095
if value is None: # get
2096
return dbus.String(self.host)
2097
self.host = str(value)
2098
2099
# Created - property
2100
@dbus_annotations(
2101
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2102
@dbus_service_property(_interface, signature="s", access="read")
2103
def Created_dbus_property(self):
2104
return datetime_to_dbus(self.created)
2105
2106
# LastEnabled - property
2107
@dbus_service_property(_interface, signature="s", access="read")
2108
def LastEnabled_dbus_property(self):
2109
return datetime_to_dbus(self.last_enabled)
2110
2111
# Enabled - property
2112
@dbus_service_property(_interface,
2113
signature="b",
2114
access="readwrite")
2115
def Enabled_dbus_property(self, value=None):
2116
if value is None: # get
2117
return dbus.Boolean(self.enabled)
2118
if value:
2119
self.enable()
2120
else:
2121
self.disable()
2122
2123
# LastCheckedOK - property
2124
@dbus_service_property(_interface,
2125
signature="s",
2126
access="readwrite")
2127
def LastCheckedOK_dbus_property(self, value=None):
2128
if value is not None:
2129
self.checked_ok()
2130
return
2131
return datetime_to_dbus(self.last_checked_ok)
2132
2133
# LastCheckerStatus - property
2134
@dbus_service_property(_interface, signature="n", access="read")
2135
def LastCheckerStatus_dbus_property(self):
2136
return dbus.Int16(self.last_checker_status)
2137
2138
# Expires - property
2139
@dbus_service_property(_interface, signature="s", access="read")
2140
def Expires_dbus_property(self):
2141
return datetime_to_dbus(self.expires)
2142
2143
# LastApprovalRequest - property
2144
@dbus_service_property(_interface, signature="s", access="read")
2145
def LastApprovalRequest_dbus_property(self):
2146
return datetime_to_dbus(self.last_approval_request)
2147
2148
# Timeout - property
2149
@dbus_service_property(_interface,
2150
signature="t",
2151
access="readwrite")
2152
def Timeout_dbus_property(self, value=None):
2153
if value is None: # get
2154
return dbus.UInt64(self.timeout.total_seconds() * 1000)
2155
old_timeout = self.timeout
2156
self.timeout = datetime.timedelta(0, 0, 0, value)
2157
# Reschedule disabling
2158
if self.enabled:
2159
now = datetime.datetime.utcnow()
2160
self.expires += self.timeout - old_timeout
2161
if self.expires <= now:
2162
# The timeout has passed
2163
self.disable()
2164
else:
2165
if (getattr(self, "disable_initiator_tag", None)
2166
is None):
2167
return
2168
GLib.source_remove(self.disable_initiator_tag)
2169
self.disable_initiator_tag = GLib.timeout_add(
2170
int((self.expires - now).total_seconds() * 1000),
2171
self.disable)
2172
2173
# ExtendedTimeout - property
2174
@dbus_service_property(_interface,
2175
signature="t",
2176
access="readwrite")
2177
def ExtendedTimeout_dbus_property(self, value=None):
2178
if value is None: # get
2179
return dbus.UInt64(self.extended_timeout.total_seconds()
2180
* 1000)
2181
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
2182
2183
# Interval - property
2184
@dbus_service_property(_interface,
2185
signature="t",
2186
access="readwrite")
2187
def Interval_dbus_property(self, value=None):
2188
if value is None: # get
2189
return dbus.UInt64(self.interval.total_seconds() * 1000)
2190
self.interval = datetime.timedelta(0, 0, 0, value)
2191
if getattr(self, "checker_initiator_tag", None) is None:
2192
return
2193
if self.enabled:
2194
# Reschedule checker run
2195
GLib.source_remove(self.checker_initiator_tag)
2196
self.checker_initiator_tag = GLib.timeout_add(
2197
value, self.start_checker)
2198
self.start_checker() # Start one now, too
2199
2200
# Checker - property
2201
@dbus_service_property(_interface,
2202
signature="s",
2203
access="readwrite")
2204
def Checker_dbus_property(self, value=None):
2205
if value is None: # get
2206
return dbus.String(self.checker_command)
2207
self.checker_command = str(value)
2208
2209
# CheckerRunning - property
2210
@dbus_service_property(_interface,
2211
signature="b",
2212
access="readwrite")
2213
def CheckerRunning_dbus_property(self, value=None):
2214
if value is None: # get
2215
return dbus.Boolean(self.checker is not None)
2216
if value:
2217
self.start_checker()
2218
else:
2219
self.stop_checker()
2220
2221
# ObjectPath - property
2222
@dbus_annotations(
2223
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
2224
"org.freedesktop.DBus.Deprecated": "true"})
2225
@dbus_service_property(_interface, signature="o", access="read")
2226
def ObjectPath_dbus_property(self):
2227
return self.dbus_object_path # is already a dbus.ObjectPath
2228
2229
# Secret = property
2230
@dbus_annotations(
2231
{"org.freedesktop.DBus.Property.EmitsChangedSignal":
2232
"invalidates"})
2233
@dbus_service_property(_interface,
2234
signature="ay",
2235
access="write",
2236
byte_arrays=True)
2237
def Secret_dbus_property(self, value):
2238
self.secret = bytes(value)
2239
584
StopChecker = dbus.service.method(_interface)(stop_checker)
585
StopChecker.__name__ = "StopChecker"
586
2240
587
del _interface
2241
588
2242
589
2243
class ProxyClient:
2244
def __init__(self, child_pipe, key_id, fpr, address):
2245
self._pipe = child_pipe
2246
self._pipe.send(('init', key_id, fpr, address))
2247
if not self._pipe.recv():
2248
raise KeyError(key_id or fpr)
2249
2250
def __getattribute__(self, name):
2251
if name == '_pipe':
2252
return super(ProxyClient, self).__getattribute__(name)
2253
self._pipe.send(('getattr', name))
2254
data = self._pipe.recv()
2255
if data[0] == 'data':
2256
return data[1]
2257
if data[0] == 'function':
2258
2259
def func(*args, **kwargs):
2260
self._pipe.send(('funcall', name, args, kwargs))
2261
return self._pipe.recv()[1]
2262
2263
return func
2264
2265
def __setattr__(self, name, value):
2266
if name == '_pipe':
2267
return super(ProxyClient, self).__setattr__(name, value)
2268
self._pipe.send(('setattr', name, value))
2269
2270
2271
class ClientHandler(socketserver.BaseRequestHandler, object):
2272
"""A class to handle client connections.
2273
2274
Instantiated once for each connection to handle it.
590
def peer_certificate(session):
591
"Return the peer's OpenPGP certificate as a bytestring"
592
# If not an OpenPGP certificate...
593
if (gnutls.library.functions
594
.gnutls_certificate_type_get(session._c_object)
595
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
596
# ...do the normal thing
597
return session.peer_certificate
598
list_size = ctypes.c_uint(1)
599
cert_list = (gnutls.library.functions
600
.gnutls_certificate_get_peers
601
(session._c_object, ctypes.byref(list_size)))
602
if not bool(cert_list) and list_size.value != 0:
603
raise gnutls.errors.GNUTLSError("error getting peer"
604
" certificate")
605
if list_size.value == 0:
606
return None
607
cert = cert_list[0]
608
return ctypes.string_at(cert.data, cert.size)
609
610
611
def fingerprint(openpgp):
612
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
613
# New GnuTLS "datum" with the OpenPGP public key
614
datum = (gnutls.library.types
615
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
616
ctypes.POINTER
617
(ctypes.c_ubyte)),
618
ctypes.c_uint(len(openpgp))))
619
# New empty GnuTLS certificate
620
crt = gnutls.library.types.gnutls_openpgp_crt_t()
621
(gnutls.library.functions
622
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
623
# Import the OpenPGP public key into the certificate
624
(gnutls.library.functions
625
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
626
gnutls.library.constants
627
.GNUTLS_OPENPGP_FMT_RAW))
628
# Verify the self signature in the key
629
crtverify = ctypes.c_uint()
630
(gnutls.library.functions
631
.gnutls_openpgp_crt_verify_self(crt, 0, ctypes.byref(crtverify)))
632
if crtverify.value != 0:
633
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
634
raise gnutls.errors.CertificateSecurityError("Verify failed")
635
# New buffer for the fingerprint
636
buf = ctypes.create_string_buffer(20)
637
buf_len = ctypes.c_size_t()
638
# Get the fingerprint from the certificate into the buffer
639
(gnutls.library.functions
640
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
641
ctypes.byref(buf_len)))
642
# Deinit the certificate
643
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
644
# Convert the buffer to a Python bytestring
645
fpr = ctypes.string_at(buf, buf_len.value)
646
# Convert the bytestring to hexadecimal notation
647
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
648
return hex_fpr
649
650
651
class TCP_handler(SocketServer.BaseRequestHandler, object):
652
"""A TCP request handler class.
653
Instantiated by IPv6_TCPServer for each request to handle it.
2275
654
Note: This will run in its own forked process."""
2276
655
2277
656
def handle(self):
2278
with contextlib.closing(self.server.child_pipe) as child_pipe:
2279
logger.info("TCP connection from: %s",
2280
str(self.client_address))
2281
logger.debug("Pipe FD: %d",
2282
self.server.child_pipe.fileno())
2283
2284
session = gnutls.ClientSession(self.request)
2285
2286
# priority = ':'.join(("NONE", "+VERS-TLS1.1",
2287
# "+AES-256-CBC", "+SHA1",
2288
# "+COMP-NULL", "+CTYPE-OPENPGP",
2289
# "+DHE-DSS"))
2290
# Use a fallback default, since this MUST be set.
2291
priority = self.server.gnutls_priority
2292
if priority is None:
2293
priority = "NORMAL"
2294
gnutls.priority_set_direct(session._c_object,
2295
priority.encode("utf-8"),
2296
None)
2297
2298
# Start communication using the Mandos protocol
2299
# Get protocol number
2300
line = self.request.makefile().readline()
2301
logger.debug("Protocol version: %r", line)
2302
try:
2303
if int(line.strip().split()[0]) > 1:
2304
raise RuntimeError(line)
2305
except (ValueError, IndexError, RuntimeError) as error:
2306
logger.error("Unknown protocol version: %s", error)
2307
return
2308
2309
# Start GnuTLS connection
2310
try:
2311
session.handshake()
2312
except gnutls.Error as error:
2313
logger.warning("Handshake failed: %s", error)
2314
# Do not run session.bye() here: the session is not
2315
# established. Just abandon the request.
2316
return
2317
logger.debug("Handshake succeeded")
2318
2319
approval_required = False
2320
try:
2321
if gnutls.has_rawpk:
2322
fpr = b""
2323
try:
2324
key_id = self.key_id(
2325
self.peer_certificate(session))
2326
except (TypeError, gnutls.Error) as error:
2327
logger.warning("Bad certificate: %s", error)
2328
return
2329
logger.debug("Key ID: %s", key_id)
2330
2331
else:
2332
key_id = b""
2333
try:
2334
fpr = self.fingerprint(
2335
self.peer_certificate(session))
2336
except (TypeError, gnutls.Error) as error:
2337
logger.warning("Bad certificate: %s", error)
2338
return
2339
logger.debug("Fingerprint: %s", fpr)
2340
2341
try:
2342
client = ProxyClient(child_pipe, key_id, fpr,
2343
self.client_address)
2344
except KeyError:
2345
return
2346
2347
if client.approval_delay:
2348
delay = client.approval_delay
2349
client.approvals_pending += 1
2350
approval_required = True
2351
2352
while True:
2353
if not client.enabled:
2354
logger.info("Client %s is disabled",
2355
client.name)
2356
if self.server.use_dbus:
2357
# Emit D-Bus signal
2358
client.Rejected("Disabled")
2359
return
2360
2361
if client.approved or not client.approval_delay:
2362
# We are approved or approval is disabled
2363
break
2364
elif client.approved is None:
2365
logger.info("Client %s needs approval",
2366
client.name)
2367
if self.server.use_dbus:
2368
# Emit D-Bus signal
2369
client.NeedApproval(
2370
client.approval_delay.total_seconds()
2371
* 1000, client.approved_by_default)
2372
else:
2373
logger.warning("Client %s was not approved",
2374
client.name)
2375
if self.server.use_dbus:
2376
# Emit D-Bus signal
2377
client.Rejected("Denied")
2378
return
2379
2380
# wait until timeout or approved
2381
time = datetime.datetime.now()
2382
client.changedstate.acquire()
2383
client.changedstate.wait(delay.total_seconds())
2384
client.changedstate.release()
2385
time2 = datetime.datetime.now()
2386
if (time2 - time) >= delay:
2387
if not client.approved_by_default:
2388
logger.warning("Client %s timed out while"
2389
" waiting for approval",
2390
client.name)
2391
if self.server.use_dbus:
2392
# Emit D-Bus signal
2393
client.Rejected("Approval timed out")
2394
return
2395
else:
2396
break
2397
else:
2398
delay -= time2 - time
2399
2400
try:
2401
session.send(client.secret)
2402
except gnutls.Error as error:
2403
logger.warning("gnutls send failed",
2404
exc_info=error)
2405
return
2406
2407
logger.info("Sending secret to %s", client.name)
2408
# bump the timeout using extended_timeout
2409
client.bump_timeout(client.extended_timeout)
2410
if self.server.use_dbus:
2411
# Emit D-Bus signal
2412
client.GotSecret()
2413
2414
finally:
2415
if approval_required:
2416
client.approvals_pending -= 1
2417
try:
2418
session.bye()
2419
except gnutls.Error as error:
2420
logger.warning("GnuTLS bye failed",
2421
exc_info=error)
2422
2423
@staticmethod
2424
def peer_certificate(session):
2425
"Return the peer's certificate as a bytestring"
2426
try:
2427
cert_type = gnutls.certificate_type_get2(session._c_object,
2428
gnutls.CTYPE_PEERS)
2429
except AttributeError:
2430
cert_type = gnutls.certificate_type_get(session._c_object)
2431
if gnutls.has_rawpk:
2432
valid_cert_types = frozenset((gnutls.CRT_RAWPK,))
657
logger.info(u"TCP connection from: %s",
658
unicode(self.client_address))
659
session = (gnutls.connection
660
.ClientSession(self.request,
661
gnutls.connection
662
.X509Credentials()))
663
664
line = self.request.makefile().readline()
665
logger.debug(u"Protocol version: %r", line)
666
try:
667
if int(line.strip().split()[0]) > 1:
668
raise RuntimeError
669
except (ValueError, IndexError, RuntimeError), error:
670
logger.error(u"Unknown protocol version: %s", error)
671
return
672
673
# Note: gnutls.connection.X509Credentials is really a generic
674
# GnuTLS certificate credentials object so long as no X.509
675
# keys are added to it. Therefore, we can use it here despite
676
# using OpenPGP certificates.
677
678
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
679
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
680
# "+DHE-DSS"))
681
# Use a fallback default, since this MUST be set.
682
priority = self.server.settings.get("priority", "NORMAL")
683
(gnutls.library.functions
684
.gnutls_priority_set_direct(session._c_object,
685
priority, None))
686
687
try:
688
session.handshake()
689
except gnutls.errors.GNUTLSError, error:
690
logger.warning(u"Handshake failed: %s", error)
691
# Do not run session.bye() here: the session is not
692
# established. Just abandon the request.
693
return
694
logger.debug(u"Handshake succeeded")
695
try:
696
fpr = fingerprint(peer_certificate(session))
697
except (TypeError, gnutls.errors.GNUTLSError), error:
698
logger.warning(u"Bad certificate: %s", error)
699
session.bye()
700
return
701
logger.debug(u"Fingerprint: %s", fpr)
702
for c in self.server.clients:
703
if c.fingerprint == fpr:
704
client = c
705
break
2433
706
else:
2434
valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))
2435
# If not a valid certificate type...
2436
if cert_type not in valid_cert_types:
2437
logger.info("Cert type %r not in %r", cert_type,
2438
valid_cert_types)
2439
# ...return invalid data
2440
return b""
2441
list_size = ctypes.c_uint(1)
2442
cert_list = (gnutls.certificate_get_peers
2443
(session._c_object, ctypes.byref(list_size)))
2444
if not bool(cert_list) and list_size.value != 0:
2445
raise gnutls.Error("error getting peer certificate")
2446
if list_size.value == 0:
2447
return None
2448
cert = cert_list[0]
2449
return ctypes.string_at(cert.data, cert.size)
2450
2451
@staticmethod
2452
def key_id(certificate):
2453
"Convert a certificate bytestring to a hexdigit key ID"
2454
# New GnuTLS "datum" with the public key
2455
datum = gnutls.datum_t(
2456
ctypes.cast(ctypes.c_char_p(certificate),
2457
ctypes.POINTER(ctypes.c_ubyte)),
2458
ctypes.c_uint(len(certificate)))
2459
# XXX all these need to be created in the gnutls "module"
2460
# New empty GnuTLS certificate
2461
pubkey = gnutls.pubkey_t()
2462
gnutls.pubkey_init(ctypes.byref(pubkey))
2463
# Import the raw public key into the certificate
2464
gnutls.pubkey_import(pubkey,
2465
ctypes.byref(datum),
2466
gnutls.X509_FMT_DER)
2467
# New buffer for the key ID
2468
buf = ctypes.create_string_buffer(32)
2469
buf_len = ctypes.c_size_t(len(buf))
2470
# Get the key ID from the raw public key into the buffer
2471
gnutls.pubkey_get_key_id(pubkey,
2472
gnutls.KEYID_USE_SHA256,
2473
ctypes.cast(ctypes.byref(buf),
2474
ctypes.POINTER(ctypes.c_ubyte)),
2475
ctypes.byref(buf_len))
2476
# Deinit the certificate
2477
gnutls.pubkey_deinit(pubkey)
2478
2479
# Convert the buffer to a Python bytestring
2480
key_id = ctypes.string_at(buf, buf_len.value)
2481
# Convert the bytestring to hexadecimal notation
2482
hex_key_id = binascii.hexlify(key_id).upper()
2483
return hex_key_id
2484
2485
@staticmethod
2486
def fingerprint(openpgp):
2487
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
2488
# New GnuTLS "datum" with the OpenPGP public key
2489
datum = gnutls.datum_t(
2490
ctypes.cast(ctypes.c_char_p(openpgp),
2491
ctypes.POINTER(ctypes.c_ubyte)),
2492
ctypes.c_uint(len(openpgp)))
2493
# New empty GnuTLS certificate
2494
crt = gnutls.openpgp_crt_t()
2495
gnutls.openpgp_crt_init(ctypes.byref(crt))
2496
# Import the OpenPGP public key into the certificate
2497
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2498
gnutls.OPENPGP_FMT_RAW)
2499
# Verify the self signature in the key
2500
crtverify = ctypes.c_uint()
2501
gnutls.openpgp_crt_verify_self(crt, 0,
2502
ctypes.byref(crtverify))
2503
if crtverify.value != 0:
2504
gnutls.openpgp_crt_deinit(crt)
2505
raise gnutls.CertificateSecurityError(code
2506
=crtverify.value)
2507
# New buffer for the fingerprint
2508
buf = ctypes.create_string_buffer(20)
2509
buf_len = ctypes.c_size_t()
2510
# Get the fingerprint from the certificate into the buffer
2511
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2512
ctypes.byref(buf_len))
2513
# Deinit the certificate
2514
gnutls.openpgp_crt_deinit(crt)
2515
# Convert the buffer to a Python bytestring
2516
fpr = ctypes.string_at(buf, buf_len.value)
2517
# Convert the bytestring to hexadecimal notation
2518
hex_fpr = binascii.hexlify(fpr).upper()
2519
return hex_fpr
2520
2521
2522
class MultiprocessingMixIn:
2523
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2524
2525
def sub_process_main(self, request, address):
2526
try:
2527
self.finish_request(request, address)
2528
except Exception:
2529
self.handle_error(request, address)
2530
self.close_request(request)
2531
2532
def process_request(self, request, address):
2533
"""Start a new process to process the request."""
2534
proc = multiprocessing.Process(target=self.sub_process_main,
2535
args=(request, address))
2536
proc.start()
2537
return proc
2538
2539
2540
class MultiprocessingMixInWithPipe(MultiprocessingMixIn):
2541
""" adds a pipe to the MixIn """
2542
2543
def process_request(self, request, client_address):
2544
"""Overrides and wraps the original process_request().
2545
2546
This function creates a new pipe in self.pipe
2547
"""
2548
parent_pipe, self.child_pipe = multiprocessing.Pipe()
2549
2550
proc = MultiprocessingMixIn.process_request(self, request,
2551
client_address)
2552
self.child_pipe.close()
2553
self.add_pipe(parent_pipe, proc)
2554
2555
def add_pipe(self, parent_pipe, proc):
2556
"""Dummy function; override as necessary"""
2557
raise NotImplementedError()
2558
2559
2560
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
2561
socketserver.TCPServer):
2562
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
2563
707
logger.warning(u"Client not found for fingerprint: %s",
708
fpr)
709
session.bye()
710
return
711
# Have to check if client.still_valid(), since it is possible
712
# that the client timed out while establishing the GnuTLS
713
# session.
714
if not client.still_valid():
715
logger.warning(u"Client %(name)s is invalid",
716
vars(client))
717
session.bye()
718
return
719
## This won't work here, since we're in a fork.
720
# client.checked_ok()
721
sent_size = 0
722
while sent_size < len(client.secret):
723
sent = session.send(client.secret[sent_size:])
724
logger.debug(u"Sent: %d, remaining: %d",
725
sent, len(client.secret)
726
- (sent_size + sent))
727
sent_size += sent
728
session.bye()
729
730
731
class IPv6_TCPServer(SocketServer.ForkingMixIn,
732
SocketServer.TCPServer, object):
733
"""IPv6 TCP server. Accepts 'None' as address and/or port.
2564
734
Attributes:
735
settings: Server settings
736
clients: Set() of Client objects
2565
737
enabled: Boolean; whether this server is activated yet
2566
interface: None or a network interface name (string)
2567
use_ipv6: Boolean; to use IPv6 or not
2568
738
"""
2569
2570
def __init__(self, server_address, RequestHandlerClass,
2571
interface=None,
2572
use_ipv6=True,
2573
socketfd=None):
2574
"""If socketfd is set, use that file descriptor instead of
2575
creating a new one with socket.socket().
2576
"""
2577
self.interface = interface
2578
if use_ipv6:
2579
self.address_family = socket.AF_INET6
2580
if socketfd is not None:
2581
# Save the file descriptor
2582
self.socketfd = socketfd
2583
# Save the original socket.socket() function
2584
self.socket_socket = socket.socket
2585
2586
# To implement --socket, we monkey patch socket.socket.
2587
#
2588
# (When socketserver.TCPServer is a new-style class, we
2589
# could make self.socket into a property instead of monkey
2590
# patching socket.socket.)
2591
#
2592
# Create a one-time-only replacement for socket.socket()
2593
@functools.wraps(socket.socket)
2594
def socket_wrapper(*args, **kwargs):
2595
# Restore original function so subsequent calls are
2596
# not affected.
2597
socket.socket = self.socket_socket
2598
del self.socket_socket
2599
# This time only, return a new socket object from the
2600
# saved file descriptor.
2601
return socket.fromfd(self.socketfd, *args, **kwargs)
2602
# Replace socket.socket() function with wrapper
2603
socket.socket = socket_wrapper
2604
# The socketserver.TCPServer.__init__ will call
2605
# socket.socket(), which might be our replacement,
2606
# socket_wrapper(), if socketfd was set.
2607
socketserver.TCPServer.__init__(self, server_address,
2608
RequestHandlerClass)
2609
739
address_family = socket.AF_INET6
740
def __init__(self, *args, **kwargs):
741
if "settings" in kwargs:
742
self.settings = kwargs["settings"]
743
del kwargs["settings"]
744
if "clients" in kwargs:
745
self.clients = kwargs["clients"]
746
del kwargs["clients"]
747
self.enabled = False
748
super(IPv6_TCPServer, self).__init__(*args, **kwargs)
2610
749
def server_bind(self):
2611
750
"""This overrides the normal server_bind() function
2612
751
to bind to an interface if one was specified, and also NOT to
2613
752
bind to an address or port if they were not specified."""
2614
global SO_BINDTODEVICE
2615
if self.interface is not None:
2616
if SO_BINDTODEVICE is None:
2617
# Fall back to a hard-coded value which seems to be
2618
# common enough.
2619
logger.warning("SO_BINDTODEVICE not found, trying 25")
2620
SO_BINDTODEVICE = 25
753
if self.settings["interface"]:
754
# 25 is from /usr/include/asm-i486/socket.h
755
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
2621
756
try:
2622
self.socket.setsockopt(
2623
socket.SOL_SOCKET, SO_BINDTODEVICE,
2624
(self.interface + "\0").encode("utf-8"))
2625
except socket.error as error:
2626
if error.errno == errno.EPERM:
2627
logger.error("No permission to bind to"
2628
" interface %s", self.interface)
2629
elif error.errno == errno.ENOPROTOOPT:
2630
logger.error("SO_BINDTODEVICE not available;"
2631
" cannot bind to interface %s",
2632
self.interface)
2633
elif error.errno == errno.ENODEV:
2634
logger.error("Interface %s does not exist,"
2635
" cannot bind", self.interface)
757
self.socket.setsockopt(socket.SOL_SOCKET,
758
SO_BINDTODEVICE,
759
self.settings["interface"])
760
except socket.error, error:
761
if error[0] == errno.EPERM:
762
logger.error(u"No permission to"
763
u" bind to interface %s",
764
self.settings["interface"])
2636
765
else:
2637
raise
766
raise error
2638
767
# Only bind(2) the socket if we really need to.
2639
768
if self.server_address[0] or self.server_address[1]:
2640
if self.server_address[1]:
2641
self.allow_reuse_address = True
2642
769
if not self.server_address[0]:
2643
if self.address_family == socket.AF_INET6:
2644
any_address = "::" # in6addr_any
2645
else:
2646
any_address = "0.0.0.0" # INADDR_ANY
2647
self.server_address = (any_address,
770
in6addr_any = "::"
771
self.server_address = (in6addr_any,
2648
772
self.server_address[1])
2649
773
elif not self.server_address[1]:
2650
self.server_address = (self.server_address[0], 0)
2651
# if self.interface:
774
self.server_address = (self.server_address[0],
775
0)
776
# if self.settings["interface"]:
2652
777
# self.server_address = (self.server_address[0],
2653
778
# 0, # port
2654
779
# 0, # flowinfo
2655
780
# if_nametoindex
2656
# (self.interface))
2657
return socketserver.TCPServer.server_bind(self)
2658
2659
2660
class MandosServer(IPv6_TCPServer):
2661
"""Mandos server.
2662
2663
Attributes:
2664
clients: set of Client objects
2665
gnutls_priority GnuTLS priority string
2666
use_dbus: Boolean; to emit D-Bus signals or not
2667
2668
Assumes a GLib.MainLoop event loop.
2669
"""
2670
2671
def __init__(self, server_address, RequestHandlerClass,
2672
interface=None,
2673
use_ipv6=True,
2674
clients=None,
2675
gnutls_priority=None,
2676
use_dbus=True,
2677
socketfd=None):
2678
self.enabled = False
2679
self.clients = clients
2680
if self.clients is None:
2681
self.clients = {}
2682
self.use_dbus = use_dbus
2683
self.gnutls_priority = gnutls_priority
2684
IPv6_TCPServer.__init__(self, server_address,
2685
RequestHandlerClass,
2686
interface=interface,
2687
use_ipv6=use_ipv6,
2688
socketfd=socketfd)
2689
781
# (self.settings
782
# ["interface"]))
783
return super(IPv6_TCPServer, self).server_bind()
2690
784
def server_activate(self):
2691
785
if self.enabled:
2692
return socketserver.TCPServer.server_activate(self)
2693
786
return super(IPv6_TCPServer, self).server_activate()
2694
787
def enable(self):
2695
788
self.enabled = True
2696
789
2697
def add_pipe(self, parent_pipe, proc):
2698
# Call "handle_ipc" for both data and EOF events
2699
GLib.io_add_watch(
2700
GLib.IOChannel.unix_new(parent_pipe.fileno()),
2701
GLib.PRIORITY_DEFAULT, GLib.IO_IN | GLib.IO_HUP,
2702
functools.partial(self.handle_ipc,
2703
parent_pipe=parent_pipe,
2704
proc=proc))
2705
2706
def handle_ipc(self, source, condition,
2707
parent_pipe=None,
2708
proc=None,
2709
client_object=None):
2710
# error, or the other end of multiprocessing.Pipe has closed
2711
if condition & (GLib.IO_ERR | GLib.IO_HUP):
2712
# Wait for other process to exit
2713
proc.join()
2714
return False
2715
2716
# Read a request from the child
2717
request = parent_pipe.recv()
2718
command = request[0]
2719
2720
if command == 'init':
2721
key_id = request[1].decode("ascii")
2722
fpr = request[2].decode("ascii")
2723
address = request[3]
2724
2725
for c in self.clients.values():
2726
if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":
2727
continue
2728
if key_id and c.key_id == key_id:
2729
client = c
2730
break
2731
if fpr and c.fingerprint == fpr:
2732
client = c
2733
break
2734
else:
2735
logger.info("Client not found for key ID: %s, address"
2736
": %s", key_id or fpr, address)
2737
if self.use_dbus:
2738
# Emit D-Bus signal
2739
mandos_dbus_service.ClientNotFound(key_id or fpr,
2740
address[0])
2741
parent_pipe.send(False)
2742
return False
2743
2744
GLib.io_add_watch(
2745
GLib.IOChannel.unix_new(parent_pipe.fileno()),
2746
GLib.PRIORITY_DEFAULT, GLib.IO_IN | GLib.IO_HUP,
2747
functools.partial(self.handle_ipc,
2748
parent_pipe=parent_pipe,
2749
proc=proc,
2750
client_object=client))
2751
parent_pipe.send(True)
2752
# remove the old hook in favor of the new above hook on
2753
# same fileno
2754
return False
2755
if command == 'funcall':
2756
funcname = request[1]
2757
args = request[2]
2758
kwargs = request[3]
2759
2760
parent_pipe.send(('data', getattr(client_object,
2761
funcname)(*args,
2762
**kwargs)))
2763
2764
if command == 'getattr':
2765
attrname = request[1]
2766
if isinstance(client_object.__getattribute__(attrname),
2767
collections.abc.Callable):
2768
parent_pipe.send(('function', ))
2769
else:
2770
parent_pipe.send((
2771
'data', client_object.__getattribute__(attrname)))
2772
2773
if command == 'setattr':
2774
attrname = request[1]
2775
value = request[2]
2776
setattr(client_object, attrname, value)
2777
2778
return True
2779
2780
2781
def rfc3339_duration_to_delta(duration):
2782
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2783
2784
>>> rfc3339_duration_to_delta("P7D") == datetime.timedelta(7)
2785
True
2786
>>> rfc3339_duration_to_delta("PT60S") == datetime.timedelta(0, 60)
2787
True
2788
>>> rfc3339_duration_to_delta("PT60M") == datetime.timedelta(0, 3600)
2789
True
2790
>>> rfc3339_duration_to_delta("PT24H") == datetime.timedelta(1)
2791
True
2792
>>> rfc3339_duration_to_delta("P1W") == datetime.timedelta(7)
2793
True
2794
>>> rfc3339_duration_to_delta("PT5M30S") == datetime.timedelta(0, 330)
2795
True
2796
>>> rfc3339_duration_to_delta("P1DT3M20S") == datetime.timedelta(1, 200)
2797
True
2798
"""
2799
2800
# Parsing an RFC 3339 duration with regular expressions is not
2801
# possible - there would have to be multiple places for the same
2802
# values, like seconds. The current code, while more esoteric, is
2803
# cleaner without depending on a parsing library. If Python had a
2804
# built-in library for parsing we would use it, but we'd like to
2805
# avoid excessive use of external libraries.
2806
2807
# New type for defining tokens, syntax, and semantics all-in-one
2808
Token = collections.namedtuple("Token", (
2809
"regexp", # To match token; if "value" is not None, must have
2810
# a "group" containing digits
2811
"value", # datetime.timedelta or None
2812
"followers")) # Tokens valid after this token
2813
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2814
# the "duration" ABNF definition in RFC 3339, Appendix A.
2815
token_end = Token(re.compile(r"$"), None, frozenset())
2816
token_second = Token(re.compile(r"(\d+)S"),
2817
datetime.timedelta(seconds=1),
2818
frozenset((token_end, )))
2819
token_minute = Token(re.compile(r"(\d+)M"),
2820
datetime.timedelta(minutes=1),
2821
frozenset((token_second, token_end)))
2822
token_hour = Token(re.compile(r"(\d+)H"),
2823
datetime.timedelta(hours=1),
2824
frozenset((token_minute, token_end)))
2825
token_time = Token(re.compile(r"T"),
2826
None,
2827
frozenset((token_hour, token_minute,
2828
token_second)))
2829
token_day = Token(re.compile(r"(\d+)D"),
2830
datetime.timedelta(days=1),
2831
frozenset((token_time, token_end)))
2832
token_month = Token(re.compile(r"(\d+)M"),
2833
datetime.timedelta(weeks=4),
2834
frozenset((token_day, token_end)))
2835
token_year = Token(re.compile(r"(\d+)Y"),
2836
datetime.timedelta(weeks=52),
2837
frozenset((token_month, token_end)))
2838
token_week = Token(re.compile(r"(\d+)W"),
2839
datetime.timedelta(weeks=1),
2840
frozenset((token_end, )))
2841
token_duration = Token(re.compile(r"P"), None,
2842
frozenset((token_year, token_month,
2843
token_day, token_time,
2844
token_week)))
2845
# Define starting values:
2846
# Value so far
2847
value = datetime.timedelta()
2848
found_token = None
2849
# Following valid tokens
2850
followers = frozenset((token_duration, ))
2851
# String left to parse
2852
s = duration
2853
# Loop until end token is found
2854
while found_token is not token_end:
2855
# Search for any currently valid tokens
2856
for token in followers:
2857
match = token.regexp.match(s)
2858
if match is not None:
2859
# Token found
2860
if token.value is not None:
2861
# Value found, parse digits
2862
factor = int(match.group(1), 10)
2863
# Add to value so far
2864
value += factor * token.value
2865
# Strip token from string
2866
s = token.regexp.sub("", s, 1)
2867
# Go to found token
2868
found_token = token
2869
# Set valid next tokens
2870
followers = found_token.followers
2871
break
2872
else:
2873
# No currently valid tokens were found
2874
raise ValueError("Invalid RFC 3339 duration: {!r}"
2875
.format(duration))
2876
# End token found
2877
return value
2878
2879
790
2880
791
def string_to_delta(interval):
2881
792
"""Parse a string and return a datetime.timedelta
2882
793
2883
>>> string_to_delta('7d') == datetime.timedelta(7)
2884
True
2885
>>> string_to_delta('60s') == datetime.timedelta(0, 60)
2886
True
2887
>>> string_to_delta('60m') == datetime.timedelta(0, 3600)
2888
True
2889
>>> string_to_delta('24h') == datetime.timedelta(1)
2890
True
2891
>>> string_to_delta('1w') == datetime.timedelta(7)
2892
True
2893
>>> string_to_delta('5m 30s') == datetime.timedelta(0, 330)
2894
True
794
>>> string_to_delta('7d')
795
datetime.timedelta(7)
796
>>> string_to_delta('60s')
797
datetime.timedelta(0, 60)
798
>>> string_to_delta('60m')
799
datetime.timedelta(0, 3600)
800
>>> string_to_delta('24h')
801
datetime.timedelta(1)
802
>>> string_to_delta(u'1w')
803
datetime.timedelta(7)
804
>>> string_to_delta('5m 30s')
805
datetime.timedelta(0, 330)
2895
806
"""
2896
2897
try:
2898
return rfc3339_duration_to_delta(interval)
2899
except ValueError:
2900
pass
2901
2902
807
timevalue = datetime.timedelta(0)
2903
808
for s in interval.split():
2904
809
try:
2905
suffix = s[-1]
810
suffix = unicode(s[-1])
2906
811
value = int(s[:-1])
2907
if suffix == "d":
812
if suffix == u"d":
2908
813
delta = datetime.timedelta(value)
2909
elif suffix == "s":
814
elif suffix == u"s":
2910
815
delta = datetime.timedelta(0, value)
2911
elif suffix == "m":
816
elif suffix == u"m":
2912
817
delta = datetime.timedelta(0, 0, 0, 0, value)
2913
elif suffix == "h":
818
elif suffix == u"h":
2914
819
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
2915
elif suffix == "w":
820
elif suffix == u"w":
2916
821
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
2917
822
else:
2918
raise ValueError("Unknown suffix {!r}".format(suffix))
2919
except IndexError as e:
2920
raise ValueError(*(e.args))
823
raise ValueError
824
except (ValueError, IndexError):
825
raise ValueError
2921
826
timevalue += delta
2922
827
return timevalue
2923
828
2924
829
2925
def daemon(nochdir=False, noclose=False):
830
def server_state_changed(state):
831
"""Derived from the Avahi example code"""
832
if state == avahi.SERVER_COLLISION:
833
logger.error(u"Zeroconf server name collision")
834
service.remove()
835
elif state == avahi.SERVER_RUNNING:
836
service.add()
837
838
839
def entry_group_state_changed(state, error):
840
"""Derived from the Avahi example code"""
841
logger.debug(u"Avahi state change: %i", state)
842
843
if state == avahi.ENTRY_GROUP_ESTABLISHED:
844
logger.debug(u"Zeroconf service established.")
845
elif state == avahi.ENTRY_GROUP_COLLISION:
846
logger.warning(u"Zeroconf service name collision.")
847
service.rename()
848
elif state == avahi.ENTRY_GROUP_FAILURE:
849
logger.critical(u"Avahi: Error in group state changed %s",
850
unicode(error))
851
raise AvahiGroupError(u"State changed: %s" % unicode(error))
852
853
def if_nametoindex(interface):
854
"""Call the C function if_nametoindex(), or equivalent"""
855
global if_nametoindex
856
try:
857
if_nametoindex = (ctypes.cdll.LoadLibrary
858
(ctypes.util.find_library("c"))
859
.if_nametoindex)
860
except (OSError, AttributeError):
861
if "struct" not in sys.modules:
862
import struct
863
if "fcntl" not in sys.modules:
864
import fcntl
865
def if_nametoindex(interface):
866
"Get an interface index the hard way, i.e. using fcntl()"
867
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
868
with closing(socket.socket()) as s:
869
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
870
struct.pack("16s16x", interface))
871
interface_index = struct.unpack("I", ifreq[16:20])[0]
872
return interface_index
873
return if_nametoindex(interface)
874
875
876
def daemon(nochdir = False, noclose = False):
2926
877
"""See daemon(3). Standard BSD Unix function.
2927
2928
878
This should really exist as os.daemon, but it doesn't (yet)."""
2929
879
if os.fork():
2930
880
sys.exit()
2935
885
sys.exit()
2936
886
if not noclose:
2937
887
# Close all standard open file descriptors
2938
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
888
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2939
889
if not stat.S_ISCHR(os.fstat(null).st_mode):
2940
890
raise OSError(errno.ENODEV,
2941
"{} not a character device"
2942
.format(os.devnull))
891
"/dev/null not a character device")
2943
892
os.dup2(null, sys.stdin.fileno())
2944
893
os.dup2(null, sys.stdout.fileno())
2945
894
os.dup2(null, sys.stderr.fileno())
2948
897
2949
898
2950
899
def main():
2951
2952
##################################################################
2953
# Parsing of options, both command line and config file
2954
2955
parser = argparse.ArgumentParser()
2956
parser.add_argument("-v", "--version", action="version",
2957
version="%(prog)s {}".format(version),
2958
help="show version number and exit")
2959
parser.add_argument("-i", "--interface", metavar="IF",
2960
help="Bind to interface IF")
2961
parser.add_argument("-a", "--address",
2962
help="Address to listen for requests on")
2963
parser.add_argument("-p", "--port", type=int,
2964
help="Port number to receive requests on")
2965
parser.add_argument("--check", action="store_true",
2966
help="Run self-test")
2967
parser.add_argument("--debug", action="store_true",
2968
help="Debug mode; run in foreground and log"
2969
" to terminal", default=None)
2970
parser.add_argument("--debuglevel", metavar="LEVEL",
2971
help="Debug level for stdout output")
2972
parser.add_argument("--priority", help="GnuTLS"
2973
" priority string (see GnuTLS documentation)")
2974
parser.add_argument("--servicename",
2975
metavar="NAME", help="Zeroconf service name")
2976
parser.add_argument("--configdir",
2977
default="/etc/mandos", metavar="DIR",
2978
help="Directory to search for configuration"
2979
" files")
2980
parser.add_argument("--no-dbus", action="store_false",
2981
dest="use_dbus", help="Do not provide D-Bus"
2982
" system bus interface", default=None)
2983
parser.add_argument("--no-ipv6", action="store_false",
2984
dest="use_ipv6", help="Do not use IPv6",
2985
default=None)
2986
parser.add_argument("--no-restore", action="store_false",
2987
dest="restore", help="Do not restore stored"
2988
" state", default=None)
2989
parser.add_argument("--socket", type=int,
2990
help="Specify a file descriptor to a network"
2991
" socket to use instead of creating one")
2992
parser.add_argument("--statedir", metavar="DIR",
2993
help="Directory to save/restore state in")
2994
parser.add_argument("--foreground", action="store_true",
2995
help="Run in foreground", default=None)
2996
parser.add_argument("--no-zeroconf", action="store_false",
2997
dest="zeroconf", help="Do not use Zeroconf",
2998
default=None)
2999
3000
options = parser.parse_args()
3001
900
parser = optparse.OptionParser(version = "%%prog %s" % version)
901
parser.add_option("-i", "--interface", type="string",
902
metavar="IF", help="Bind to interface IF")
903
parser.add_option("-a", "--address", type="string",
904
help="Address to listen for requests on")
905
parser.add_option("-p", "--port", type="int",
906
help="Port number to receive requests on")
907
parser.add_option("--check", action="store_true",
908
help="Run self-test")
909
parser.add_option("--debug", action="store_true",
910
help="Debug mode; run in foreground and log to"
911
" terminal")
912
parser.add_option("--priority", type="string", help="GnuTLS"
913
" priority string (see GnuTLS documentation)")
914
parser.add_option("--servicename", type="string", metavar="NAME",
915
help="Zeroconf service name")
916
parser.add_option("--configdir", type="string",
917
default="/etc/mandos", metavar="DIR",
918
help="Directory to search for configuration"
919
" files")
920
parser.add_option("--no-dbus", action="store_false",
921
dest="use_dbus",
922
help="Do not provide D-Bus system bus"
923
" interface")
924
options = parser.parse_args()[0]
925
926
if options.check:
927
import doctest
928
doctest.testmod()
929
sys.exit()
930
3002
931
# Default values for config file for server-global settings
3003
if gnutls.has_rawpk:
3004
priority = ("SECURE128:!CTYPE-X.509:+CTYPE-RAWPK:!RSA"
3005
":!VERS-ALL:+VERS-TLS1.3:%PROFILE_ULTRA")
3006
else:
3007
priority = ("SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
3008
":+SIGN-DSA-SHA256")
3009
server_defaults = {"interface": "",
3010
"address": "",
3011
"port": "",
3012
"debug": "False",
3013
"priority": priority,
3014
"servicename": "Mandos",
3015
"use_dbus": "True",
3016
"use_ipv6": "True",
3017
"debuglevel": "",
3018
"restore": "True",
3019
"socket": "",
3020
"statedir": "/var/lib/mandos",
3021
"foreground": "False",
3022
"zeroconf": "True",
3023
}
3024
del priority
3025
932
server_defaults = { "interface": "",
933
"address": "",
934
"port": "",
935
"debug": "False",
936
"priority":
937
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
938
"servicename": "Mandos",
939
"use_dbus": "True",
940
}
941
3026
942
# Parse config file for server-global settings
3027
server_config = configparser.ConfigParser(server_defaults)
943
server_config = ConfigParser.SafeConfigParser(server_defaults)
3028
944
del server_defaults
3029
945
server_config.read(os.path.join(options.configdir, "mandos.conf"))
3030
# Convert the ConfigParser object to a dict
946
# Convert the SafeConfigParser object to a dict
3031
947
server_settings = server_config.defaults()
3032
948
# Use the appropriate methods on the non-string config options
3033
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3034
"foreground", "zeroconf"):
3035
server_settings[option] = server_config.getboolean("DEFAULT",
3036
option)
949
server_settings["debug"] = server_config.getboolean("DEFAULT",
950
"debug")
951
server_settings["use_dbus"] = server_config.getboolean("DEFAULT",
952
"use_dbus")
3037
953
if server_settings["port"]:
3038
954
server_settings["port"] = server_config.getint("DEFAULT",
3039
955
"port")
3040
if server_settings["socket"]:
3041
server_settings["socket"] = server_config.getint("DEFAULT",
3042
"socket")
3043
# Later, stdin will, and stdout and stderr might, be dup'ed
3044
# over with an opened os.devnull. But we don't want this to
3045
# happen with a supplied network socket.
3046
if 0 <= server_settings["socket"] <= 2:
3047
server_settings["socket"] = os.dup(server_settings
3048
["socket"])
3049
956
del server_config
3050
957
3051
958
# Override the settings from the config file with command line
3052
959
# options, if set.
3053
960
for option in ("interface", "address", "port", "debug",
3054
"priority", "servicename", "configdir", "use_dbus",
3055
"use_ipv6", "debuglevel", "restore", "statedir",
3056
"socket", "foreground", "zeroconf"):
961
"priority", "servicename", "configdir",
962
"use_dbus"):
3057
963
value = getattr(options, option)
3058
964
if value is not None:
3059
965
server_settings[option] = value
3060
966
del options
3061
# Force all strings to be unicode
3062
for option in server_settings.keys():
3063
if isinstance(server_settings[option], bytes):
3064
server_settings[option] = (server_settings[option]
3065
.decode("utf-8"))
3066
# Force all boolean options to be boolean
3067
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3068
"foreground", "zeroconf"):
3069
server_settings[option] = bool(server_settings[option])
3070
# Debug implies foreground
3071
if server_settings["debug"]:
3072
server_settings["foreground"] = True
3073
967
# Now we have our good server settings in "server_settings"
3074
3075
##################################################################
3076
3077
if (not server_settings["zeroconf"]
3078
and not (server_settings["port"]
3079
or server_settings["socket"] != "")):
3080
parser.error("Needs port or socket to work without Zeroconf")
3081
968
3082
969
# For convenience
3083
970
debug = server_settings["debug"]
3084
debuglevel = server_settings["debuglevel"]
3085
971
use_dbus = server_settings["use_dbus"]
3086
use_ipv6 = server_settings["use_ipv6"]
3087
stored_state_path = os.path.join(server_settings["statedir"],
3088
stored_state_file)
3089
foreground = server_settings["foreground"]
3090
zeroconf = server_settings["zeroconf"]
3091
3092
if debug:
3093
initlogger(debug, logging.DEBUG)
3094
else:
3095
if not debuglevel:
3096
initlogger(debug)
3097
else:
3098
level = getattr(logging, debuglevel.upper())
3099
initlogger(debug, level)
3100
972
973
if not debug:
974
syslogger.setLevel(logging.WARNING)
975
console.setLevel(logging.WARNING)
976
3101
977
if server_settings["servicename"] != "Mandos":
3102
syslogger.setFormatter(
3103
logging.Formatter('Mandos ({}) [%(process)d]:'
3104
' %(levelname)s: %(message)s'.format(
3105
server_settings["servicename"])))
3106
978
syslogger.setFormatter(logging.Formatter
979
('Mandos (%s): %%(levelname)s:'
980
' %%(message)s'
981
% server_settings["servicename"]))
982
3107
983
# Parse config file with clients
3108
client_config = configparser.ConfigParser(Client.client_defaults)
984
client_defaults = { "timeout": "1h",
985
"interval": "5m",
986
"checker": "fping -q -- %%(host)s",
987
"host": "",
988
}
989
client_config = ConfigParser.SafeConfigParser(client_defaults)
3109
990
client_config.read(os.path.join(server_settings["configdir"],
3110
991
"clients.conf"))
3111
3112
global mandos_dbus_service
3113
mandos_dbus_service = None
3114
3115
socketfd = None
3116
if server_settings["socket"] != "":
3117
socketfd = server_settings["socket"]
3118
tcp_server = MandosServer(
3119
(server_settings["address"], server_settings["port"]),
3120
ClientHandler,
3121
interface=(server_settings["interface"] or None),
3122
use_ipv6=use_ipv6,
3123
gnutls_priority=server_settings["priority"],
3124
use_dbus=use_dbus,
3125
socketfd=socketfd)
3126
if not foreground:
3127
pidfilename = "/run/mandos.pid"
3128
if not os.path.isdir("/run/."):
3129
pidfilename = "/var/run/mandos.pid"
3130
pidfile = None
3131
try:
3132
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
3133
except IOError as e:
3134
logger.error("Could not open file %r", pidfilename,
3135
exc_info=e)
3136
3137
for name, group in (("_mandos", "_mandos"),
3138
("mandos", "mandos"),
3139
("nobody", "nogroup")):
3140
try:
3141
uid = pwd.getpwnam(name).pw_uid
3142
gid = pwd.getpwnam(group).pw_gid
3143
break
992
993
clients = Set()
994
tcp_server = IPv6_TCPServer((server_settings["address"],
995
server_settings["port"]),
996
TCP_handler,
997
settings=server_settings,
998
clients=clients)
999
pidfilename = "/var/run/mandos.pid"
1000
try:
1001
pidfile = open(pidfilename, "w")
1002
except IOError, error:
1003
logger.error("Could not open file %r", pidfilename)
1004
1005
try:
1006
uid = pwd.getpwnam("_mandos").pw_uid
1007
gid = pwd.getpwnam("_mandos").pw_gid
1008
except KeyError:
1009
try:
1010
uid = pwd.getpwnam("mandos").pw_uid
1011
gid = pwd.getpwnam("mandos").pw_gid
3144
1012
except KeyError:
3145
continue
3146
else:
3147
uid = 65534
3148
gid = 65534
1013
try:
1014
uid = pwd.getpwnam("nobody").pw_uid
1015
gid = pwd.getpwnam("nogroup").pw_gid
1016
except KeyError:
1017
uid = 65534
1018
gid = 65534
3149
1019
try:
1020
os.setuid(uid)
3150
1021
os.setgid(gid)
3151
os.setuid(uid)
3152
if debug:
3153
logger.debug("Did setuid/setgid to {}:{}".format(uid,
3154
gid))
3155
except OSError as error:
3156
logger.warning("Failed to setuid/setgid to {}:{}: {}"
3157
.format(uid, gid, os.strerror(error.errno)))
3158
if error.errno != errno.EPERM:
3159
raise
3160
3161
if debug:
3162
# Enable all possible GnuTLS debugging
3163
3164
# "Use a log level over 10 to enable all debugging options."
3165
# - GnuTLS manual
3166
gnutls.global_set_log_level(11)
3167
3168
@gnutls.log_func
3169
def debug_gnutls(level, string):
3170
logger.debug("GnuTLS: %s", string[:-1])
3171
3172
gnutls.global_set_log_function(debug_gnutls)
3173
3174
# Redirect stdin so all checkers get /dev/null
3175
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
3176
os.dup2(null, sys.stdin.fileno())
3177
if null > 2:
3178
os.close(null)
3179
3180
# Need to fork before connecting to D-Bus
3181
if not foreground:
3182
# Close all input and output, do double fork, etc.
3183
daemon()
3184
3185
if gi.version_info < (3, 10, 2):
3186
# multiprocessing will use threads, so before we use GLib we
3187
# need to inform GLib that threads will be used.
3188
GLib.threads_init()
3189
1022
except OSError, error:
1023
if error[0] != errno.EPERM:
1024
raise error
1025
1026
global service
1027
service = AvahiService(name = server_settings["servicename"],
1028
servicetype = "_mandos._tcp", )
1029
if server_settings["interface"]:
1030
service.interface = (if_nametoindex
1031
(server_settings["interface"]))
1032
3190
1033
global main_loop
1034
global bus
1035
global server
3191
1036
# From the Avahi example code
3192
DBusGMainLoop(set_as_default=True)
3193
main_loop = GLib.MainLoop()
1037
DBusGMainLoop(set_as_default=True )
1038
main_loop = gobject.MainLoop()
3194
1039
bus = dbus.SystemBus()
1040
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
1041
avahi.DBUS_PATH_SERVER),
1042
avahi.DBUS_INTERFACE_SERVER)
3195
1043
# End of Avahi example code
3196
1044
if use_dbus:
3197
try:
3198
bus_name = dbus.service.BusName("se.recompile.Mandos",
3199
bus,
3200
do_not_queue=True)
3201
old_bus_name = dbus.service.BusName(
3202
"se.bsnet.fukt.Mandos", bus,
3203
do_not_queue=True)
3204
except dbus.exceptions.DBusException as e:
3205
logger.error("Disabling D-Bus:", exc_info=e)
3206
use_dbus = False
3207
server_settings["use_dbus"] = False
3208
tcp_server.use_dbus = False
3209
if zeroconf:
3210
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3211
service = AvahiServiceToSyslog(
3212
name=server_settings["servicename"],
3213
servicetype="_mandos._tcp",
3214
protocol=protocol,
3215
bus=bus)
3216
if server_settings["interface"]:
3217
service.interface = if_nametoindex(
3218
server_settings["interface"].encode("utf-8"))
3219
3220
global multiprocessing_manager
3221
multiprocessing_manager = multiprocessing.Manager()
3222
3223
client_class = Client
3224
if use_dbus:
3225
client_class = functools.partial(ClientDBus, bus=bus)
3226
3227
client_settings = Client.config_parser(client_config)
3228
old_client_settings = {}
3229
clients_data = {}
3230
3231
# This is used to redirect stdout and stderr for checker processes
3232
global wnull
3233
wnull = open(os.devnull, "w") # A writable /dev/null
3234
# Only used if server is running in foreground but not in debug
3235
# mode
3236
if debug or not foreground:
3237
wnull.close()
3238
3239
# Get client data and settings from last running state.
3240
if server_settings["restore"]:
3241
try:
3242
with open(stored_state_path, "rb") as stored_state:
3243
if sys.version_info.major == 2:
3244
clients_data, old_client_settings = pickle.load(
3245
stored_state)
3246
else:
3247
bytes_clients_data, bytes_old_client_settings = (
3248
pickle.load(stored_state, encoding="bytes"))
3249
# Fix bytes to strings
3250
# clients_data
3251
# .keys()
3252
clients_data = {(key.decode("utf-8")
3253
if isinstance(key, bytes)
3254
else key): value
3255
for key, value in
3256
bytes_clients_data.items()}
3257
del bytes_clients_data
3258
for key in clients_data:
3259
value = {(k.decode("utf-8")
3260
if isinstance(k, bytes) else k): v
3261
for k, v in
3262
clients_data[key].items()}
3263
clients_data[key] = value
3264
# .client_structure
3265
value["client_structure"] = [
3266
(s.decode("utf-8")
3267
if isinstance(s, bytes)
3268
else s) for s in
3269
value["client_structure"]]
3270
# .name, .host, and .checker_command
3271
for k in ("name", "host", "checker_command"):
3272
if isinstance(value[k], bytes):
3273
value[k] = value[k].decode("utf-8")
3274
if "key_id" not in value:
3275
value["key_id"] = ""
3276
elif "fingerprint" not in value:
3277
value["fingerprint"] = ""
3278
# old_client_settings
3279
# .keys()
3280
old_client_settings = {
3281
(key.decode("utf-8")
3282
if isinstance(key, bytes)
3283
else key): value
3284
for key, value in
3285
bytes_old_client_settings.items()}
3286
del bytes_old_client_settings
3287
# .host and .checker_command
3288
for value in old_client_settings.values():
3289
for attribute in ("host", "checker_command"):
3290
if isinstance(value[attribute], bytes):
3291
value[attribute] = (value[attribute]
3292
.decode("utf-8"))
3293
os.remove(stored_state_path)
3294
except IOError as e:
3295
if e.errno == errno.ENOENT:
3296
logger.warning("Could not load persistent state:"
3297
" {}".format(os.strerror(e.errno)))
3298
else:
3299
logger.critical("Could not load persistent state:",
3300
exc_info=e)
3301
raise
3302
except EOFError as e:
3303
logger.warning("Could not load persistent state: "
3304
"EOFError:",
3305
exc_info=e)
3306
3307
with PGPEngine() as pgp:
3308
for client_name, client in clients_data.items():
3309
# Skip removed clients
3310
if client_name not in client_settings:
3311
continue
3312
3313
# Decide which value to use after restoring saved state.
3314
# We have three different values: Old config file,
3315
# new config file, and saved state.
3316
# New config value takes precedence if it differs from old
3317
# config value, otherwise use saved state.
3318
for name, value in client_settings[client_name].items():
3319
try:
3320
# For each value in new config, check if it
3321
# differs from the old config value (Except for
3322
# the "secret" attribute)
3323
if (name != "secret"
3324
and (value !=
3325
old_client_settings[client_name][name])):
3326
client[name] = value
3327
except KeyError:
3328
pass
3329
3330
# Clients who has passed its expire date can still be
3331
# enabled if its last checker was successful. A Client
3332
# whose checker succeeded before we stored its state is
3333
# assumed to have successfully run all checkers during
3334
# downtime.
3335
if client["enabled"]:
3336
if datetime.datetime.utcnow() >= client["expires"]:
3337
if not client["last_checked_ok"]:
3338
logger.warning(
3339
"disabling client {} - Client never "
3340
"performed a successful checker".format(
3341
client_name))
3342
client["enabled"] = False
3343
elif client["last_checker_status"] != 0:
3344
logger.warning(
3345
"disabling client {} - Client last"
3346
" checker failed with error code"
3347
" {}".format(
3348
client_name,
3349
client["last_checker_status"]))
3350
client["enabled"] = False
3351
else:
3352
client["expires"] = (
3353
datetime.datetime.utcnow()
3354
+ client["timeout"])
3355
logger.debug("Last checker succeeded,"
3356
" keeping {} enabled".format(
3357
client_name))
3358
try:
3359
client["secret"] = pgp.decrypt(
3360
client["encrypted_secret"],
3361
client_settings[client_name]["secret"])
3362
except PGPError:
3363
# If decryption fails, we use secret from new settings
3364
logger.debug("Failed to decrypt {} old secret".format(
3365
client_name))
3366
client["secret"] = (client_settings[client_name]
3367
["secret"])
3368
3369
# Add/remove clients based on new changes made to config
3370
for client_name in (set(old_client_settings)
3371
- set(client_settings)):
3372
del clients_data[client_name]
3373
for client_name in (set(client_settings)
3374
- set(old_client_settings)):
3375
clients_data[client_name] = client_settings[client_name]
3376
3377
# Create all client objects
3378
for client_name, client in clients_data.items():
3379
tcp_server.clients[client_name] = client_class(
3380
name=client_name,
3381
settings=client,
3382
server_settings=server_settings)
3383
3384
if not tcp_server.clients:
3385
logger.warning("No clients defined")
3386
3387
if not foreground:
3388
if pidfile is not None:
3389
pid = os.getpid()
3390
try:
3391
with pidfile:
3392
print(pid, file=pidfile)
3393
except IOError:
3394
logger.error("Could not write to file %r with PID %d",
3395
pidfilename, pid)
1045
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
1046
1047
clients.update(Set(Client(name = section,
1048
config
1049
= dict(client_config.items(section)),
1050
use_dbus = use_dbus)
1051
for section in client_config.sections()))
1052
if not clients:
1053
logger.warning(u"No clients defined")
1054
1055
if debug:
1056
# Redirect stdin so all checkers get /dev/null
1057
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1058
os.dup2(null, sys.stdin.fileno())
1059
if null > 2:
1060
os.close(null)
1061
else:
1062
# No console logging
1063
logger.removeHandler(console)
1064
# Close all input and output, do double fork, etc.
1065
daemon()
1066
1067
try:
1068
pid = os.getpid()
1069
pidfile.write(str(pid) + "\n")
1070
pidfile.close()
3396
1071
del pidfile
3397
del pidfilename
3398
3399
for termsig in (signal.SIGHUP, signal.SIGTERM):
3400
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3401
lambda: main_loop.quit() and False)
3402
1072
except IOError:
1073
logger.error(u"Could not write to file %r with PID %d",
1074
pidfilename, pid)
1075
except NameError:
1076
# "pidfile" was never created
1077
pass
1078
del pidfilename
1079
1080
def cleanup():
1081
"Cleanup function; run on exit"
1082
global group
1083
# From the Avahi example code
1084
if not group is None:
1085
group.Free()
1086
group = None
1087
# End of Avahi example code
1088
1089
while clients:
1090
client = clients.pop()
1091
client.disable_hook = None
1092
client.disable()
1093
1094
atexit.register(cleanup)
1095
1096
if not debug:
1097
signal.signal(signal.SIGINT, signal.SIG_IGN)
1098
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1099
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1100
3403
1101
if use_dbus:
3404
3405
@alternate_dbus_interfaces(
3406
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3407
class MandosDBusService(DBusObjectWithObjectManager):
1102
class MandosServer(dbus.service.Object):
3408
1103
"""A D-Bus proxy object"""
3409
3410
1104
def __init__(self):
3411
1105
dbus.service.Object.__init__(self, bus, "/")
3412
3413
_interface = "se.recompile.Mandos"
3414
3415
@dbus.service.signal(_interface, signature="o")
3416
def ClientAdded(self, objpath):
3417
"D-Bus signal"
3418
pass
3419
3420
@dbus.service.signal(_interface, signature="ss")
3421
def ClientNotFound(self, key_id, address):
3422
"D-Bus signal"
3423
pass
3424
3425
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3426
"true"})
1106
_interface = u"se.bsnet.fukt.Mandos"
1107
1108
@dbus.service.signal(_interface, signature="oa{sv}")
1109
def ClientAdded(self, objpath, properties):
1110
"D-Bus signal"
1111
pass
1112
3427
1113
@dbus.service.signal(_interface, signature="os")
3428
1114
def ClientRemoved(self, objpath, name):
3429
1115
"D-Bus signal"
3430
1116
pass
3431
3432
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3433
"true"})
1117
3434
1118
@dbus.service.method(_interface, out_signature="ao")
3435
1119
def GetAllClients(self):
3436
1120
"D-Bus method"
3437
return dbus.Array(c.dbus_object_path for c in
3438
tcp_server.clients.values())
3439
3440
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3441
"true"})
3442
@dbus.service.method(_interface,
3443
out_signature="a{oa{sv}}")
1121
return dbus.Array(c.dbus_object_path for c in clients)
1122
1123
@dbus.service.method(_interface, out_signature="a{oa{sv}}")
3444
1124
def GetAllClientsWithProperties(self):
3445
1125
"D-Bus method"
3446
1126
return dbus.Dictionary(
3447
{c.dbus_object_path: c.GetAll(
3448
"se.recompile.Mandos.Client")
3449
for c in tcp_server.clients.values()},
1127
((c.dbus_object_path, c.GetAllProperties())
1128
for c in clients),
3450
1129
signature="oa{sv}")
3451
1130
3452
1131
@dbus.service.method(_interface, in_signature="o")
3453
1132
def RemoveClient(self, object_path):
3454
1133
"D-Bus method"
3455
for c in tcp_server.clients.values():
1134
for c in clients:
3456
1135
if c.dbus_object_path == object_path:
3457
del tcp_server.clients[c.name]
3458
c.remove_from_connection()
3459
# Don't signal the disabling
3460
c.disable(quiet=True)
3461
# Emit D-Bus signal for removal
3462
self.client_removed_signal(c)
1136
clients.remove(c)
1137
# Don't signal anything except ClientRemoved
1138
c.use_dbus = False
1139
c.disable()
1140
# Emit D-Bus signal
1141
self.ClientRemoved(object_path, c.name)
3463
1142
return
3464
raise KeyError(object_path)
3465
1143
raise KeyError
1144
3466
1145
del _interface
3467
3468
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3469
out_signature="a{oa{sa{sv}}}")
3470
def GetManagedObjects(self):
3471
"""D-Bus method"""
3472
return dbus.Dictionary(
3473
{client.dbus_object_path:
3474
dbus.Dictionary(
3475
{interface: client.GetAll(interface)
3476
for interface in
3477
client._get_all_interface_names()})
3478
for client in tcp_server.clients.values()})
3479
3480
def client_added_signal(self, client):
3481
"""Send the new standard signal and the old signal"""
3482
if use_dbus:
3483
# New standard signal
3484
self.InterfacesAdded(
3485
client.dbus_object_path,
3486
dbus.Dictionary(
3487
{interface: client.GetAll(interface)
3488
for interface in
3489
client._get_all_interface_names()}))
3490
# Old signal
3491
self.ClientAdded(client.dbus_object_path)
3492
3493
def client_removed_signal(self, client):
3494
"""Send the new standard signal and the old signal"""
3495
if use_dbus:
3496
# New standard signal
3497
self.InterfacesRemoved(
3498
client.dbus_object_path,
3499
client._get_all_interface_names())
3500
# Old signal
3501
self.ClientRemoved(client.dbus_object_path,
3502
client.name)
3503
3504
mandos_dbus_service = MandosDBusService()
3505
3506
# Save modules to variables to exempt the modules from being
3507
# unloaded before the function registered with atexit() is run.
3508
mp = multiprocessing
3509
wn = wnull
3510
3511
def cleanup():
3512
"Cleanup function; run on exit"
3513
if zeroconf:
3514
service.cleanup()
3515
3516
mp.active_children()
3517
wn.close()
3518
if not (tcp_server.clients or client_settings):
3519
return
3520
3521
# Store client before exiting. Secrets are encrypted with key
3522
# based on what config file has. If config file is
3523
# removed/edited, old secret will thus be unrecovable.
3524
clients = {}
3525
with PGPEngine() as pgp:
3526
for client in tcp_server.clients.values():
3527
key = client_settings[client.name]["secret"]
3528
client.encrypted_secret = pgp.encrypt(client.secret,
3529
key)
3530
client_dict = {}
3531
3532
# A list of attributes that can not be pickled
3533
# + secret.
3534
exclude = {"bus", "changedstate", "secret",
3535
"checker", "server_settings"}
3536
for name, typ in inspect.getmembers(dbus.service
3537
.Object):
3538
exclude.add(name)
3539
3540
client_dict["encrypted_secret"] = (client
3541
.encrypted_secret)
3542
for attr in client.client_structure:
3543
if attr not in exclude:
3544
client_dict[attr] = getattr(client, attr)
3545
3546
clients[client.name] = client_dict
3547
del client_settings[client.name]["secret"]
3548
3549
try:
3550
with tempfile.NamedTemporaryFile(
3551
mode='wb',
3552
suffix=".pickle",
3553
prefix='clients-',
3554
dir=os.path.dirname(stored_state_path),
3555
delete=False) as stored_state:
3556
pickle.dump((clients, client_settings), stored_state,
3557
protocol=2)
3558
tempname = stored_state.name
3559
os.rename(tempname, stored_state_path)
3560
except (IOError, OSError) as e:
3561
if not debug:
3562
try:
3563
os.remove(tempname)
3564
except NameError:
3565
pass
3566
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
3567
logger.warning("Could not save persistent state: {}"
3568
.format(os.strerror(e.errno)))
3569
else:
3570
logger.warning("Could not save persistent state:",
3571
exc_info=e)
3572
raise
3573
3574
# Delete all clients, and settings from config
3575
while tcp_server.clients:
3576
name, client = tcp_server.clients.popitem()
3577
if use_dbus:
3578
client.remove_from_connection()
3579
# Don't signal the disabling
3580
client.disable(quiet=True)
3581
# Emit D-Bus signal for removal
3582
if use_dbus:
3583
mandos_dbus_service.client_removed_signal(client)
3584
client_settings.clear()
3585
3586
atexit.register(cleanup)
3587
3588
for client in tcp_server.clients.values():
1146
1147
mandos_server = MandosServer()
1148
1149
for client in clients:
3589
1150
if use_dbus:
3590
# Emit D-Bus signal for adding
3591
mandos_dbus_service.client_added_signal(client)
3592
# Need to initiate checking of clients
3593
if client.enabled:
3594
client.init_checker()
3595
1151
# Emit D-Bus signal
1152
mandos_server.ClientAdded(client.dbus_object_path,
1153
client.GetAllProperties())
1154
client.enable()
1155
3596
1156
tcp_server.enable()
3597
1157
tcp_server.server_activate()
3598
1158
3599
1159
# Find out what port we got
3600
if zeroconf:
3601
service.port = tcp_server.socket.getsockname()[1]
3602
if use_ipv6:
3603
logger.info("Now listening on address %r, port %d,"
3604
" flowinfo %d, scope_id %d",
3605
*tcp_server.socket.getsockname())
3606
else: # IPv4
3607
logger.info("Now listening on address %r, port %d",
3608
*tcp_server.socket.getsockname())
3609
3610
# service.interface = tcp_server.socket.getsockname()[3]
3611
1160
service.port = tcp_server.socket.getsockname()[1]
1161
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
1162
u" scope_id %d" % tcp_server.socket.getsockname())
1163
1164
#service.interface = tcp_server.socket.getsockname()[3]
1165
3612
1166
try:
3613
if zeroconf:
3614
# From the Avahi example code
3615
try:
3616
service.activate()
3617
except dbus.exceptions.DBusException as error:
3618
logger.critical("D-Bus Exception", exc_info=error)
3619
cleanup()
3620
sys.exit(1)
3621
# End of Avahi example code
3622
3623
GLib.io_add_watch(
3624
GLib.IOChannel.unix_new(tcp_server.fileno()),
3625
GLib.PRIORITY_DEFAULT, GLib.IO_IN,
3626
lambda *args, **kwargs: (tcp_server.handle_request
3627
(*args[2:], **kwargs) or True))
3628
3629
logger.debug("Starting main loop")
1167
# From the Avahi example code
1168
server.connect_to_signal("StateChanged", server_state_changed)
1169
try:
1170
server_state_changed(server.GetState())
1171
except dbus.exceptions.DBusException, error:
1172
logger.critical(u"DBusException: %s", error)
1173
sys.exit(1)
1174
# End of Avahi example code
1175
1176
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
1177
lambda *args, **kwargs:
1178
(tcp_server.handle_request
1179
(*args[2:], **kwargs) or True))
1180
1181
logger.debug(u"Starting main loop")
3630
1182
main_loop.run()
3631
except AvahiError as error:
3632
logger.critical("Avahi Error", exc_info=error)
3633
cleanup()
1183
except AvahiError, error:
1184
logger.critical(u"AvahiError: %s", error)
3634
1185
sys.exit(1)
3635
1186
except KeyboardInterrupt:
3636
1187
if debug:
3637
print("", file=sys.stderr)
3638
logger.debug("Server received KeyboardInterrupt")
3639
logger.debug("Server exiting")
3640
# Must run before the D-Bus bus name gets deregistered
3641
cleanup()
3642
3643
3644
def should_only_run_tests():
3645
parser = argparse.ArgumentParser(add_help=False)
3646
parser.add_argument("--check", action='store_true')
3647
args, unknown_args = parser.parse_known_args()
3648
run_tests = args.check
3649
if run_tests:
3650
# Remove --check argument from sys.argv
3651
sys.argv[1:] = unknown_args
3652
return run_tests
3653
3654
# Add all tests from doctest strings
3655
def load_tests(loader, tests, none):
3656
import doctest
3657
tests.addTests(doctest.DocTestSuite())
3658
return tests
1188
print
3659
1189
3660
1190
if __name__ == '__main__':
3661
try:
3662
if should_only_run_tests():
3663
# Call using ./mandos --check [--verbose]
3664
unittest.main()
3665
else:
3666
main()
3667
finally:
3668
logging.shutdown()
1191
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0