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- Committer: Teddy Hogeborn
- Date: 2012-05-20 14:37:17 UTC
- mfrom: (237.4.31 release)
- Revision ID: teddy@recompile.se-20120520143717-48406ypmuwgwl32f
Merge from release branch.
added
removed
mandos
1
1
#!/usr/bin/python
2
2
# -*- mode: python; coding: utf-8 -*-
3
#
3
#
4
4
# Mandos server - give out binary blobs to connecting clients.
5
#
5
#
6
6
# This program is partly derived from an example program for an Avahi
7
7
# service publisher, downloaded from
8
8
# <http://avahi.org/wiki/PythonPublishExample>. This includes the
9
9
# methods "add", "remove", "server_state_changed",
10
10
# "entry_group_state_changed", "cleanup", and "activate" in the
11
11
# "AvahiService" class, and some lines in "main".
12
#
12
#
13
13
# Everything else is
14
# Copyright © 2008-2018 Teddy Hogeborn
15
# Copyright © 2008-2018 Björn Påhlsson
16
#
17
# This file is part of Mandos.
18
#
19
# Mandos is free software: you can redistribute it and/or modify it
20
# under the terms of the GNU General Public License as published by
14
# Copyright © 2008-2012 Teddy Hogeborn
15
# Copyright © 2008-2012 Björn Påhlsson
16
#
17
# This program is free software: you can redistribute it and/or modify
18
# it under the terms of the GNU General Public License as published by
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
#
28
# along with this program. If not, see
29
# <http://www.gnu.org/licenses/>.
30
#
32
31
# Contact the authors at <mandos@recompile.se>.
33
#
32
#
34
33
35
34
from __future__ import (division, absolute_import, print_function,
36
35
unicode_literals)
37
36
38
try:
39
from future_builtins import *
40
except ImportError:
41
pass
37
from future_builtins import *
42
38
43
try:
44
import SocketServer as socketserver
45
except ImportError:
46
import socketserver
39
import SocketServer as socketserver
47
40
import socket
48
41
import argparse
49
42
import datetime
50
43
import errno
51
try:
52
import ConfigParser as configparser
53
except ImportError:
54
import configparser
44
import gnutls.crypto
45
import gnutls.connection
46
import gnutls.errors
47
import gnutls.library.functions
48
import gnutls.library.constants
49
import gnutls.library.types
50
import ConfigParser as configparser
55
51
import sys
56
52
import re
57
53
import os
66
62
import struct
67
63
import fcntl
68
64
import functools
69
try:
70
import cPickle as pickle
71
except ImportError:
72
import pickle
65
import cPickle as pickle
73
66
import multiprocessing
74
67
import types
75
68
import binascii
76
69
import tempfile
77
70
import itertools
78
import collections
79
import codecs
80
71
81
72
import dbus
82
73
import dbus.service
83
from gi.repository import GLib
74
import gobject
75
import avahi
84
76
from dbus.mainloop.glib import DBusGMainLoop
85
77
import ctypes
86
78
import ctypes.util
87
79
import xml.dom.minidom
88
80
import inspect
81
import GnuPGInterface
89
82
90
# Try to find the value of SO_BINDTODEVICE:
91
83
try:
92
# This is where SO_BINDTODEVICE is in Python 3.3 (or 3.4?) and
93
# newer, and it is also the most natural place for it:
94
84
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
95
85
except AttributeError:
96
86
try:
97
# This is where SO_BINDTODEVICE was up to and including Python
98
# 2.6, and also 3.2:
99
87
from IN import SO_BINDTODEVICE
100
88
except ImportError:
101
# In Python 2.7 it seems to have been removed entirely.
102
# Try running the C preprocessor:
103
try:
104
cc = subprocess.Popen(["cc", "--language=c", "-E",
105
"/dev/stdin"],
106
stdin=subprocess.PIPE,
107
stdout=subprocess.PIPE)
108
stdout = cc.communicate(
109
"#include <sys/socket.h>\nSO_BINDTODEVICE\n")[0]
110
SO_BINDTODEVICE = int(stdout.splitlines()[-1])
111
except (OSError, ValueError, IndexError):
112
# No value found
113
SO_BINDTODEVICE = None
114
115
if sys.version_info.major == 2:
116
str = unicode
117
118
version = "1.7.19"
89
SO_BINDTODEVICE = None
90
91
version = "1.5.4"
119
92
stored_state_file = "clients.pickle"
120
93
121
94
logger = logging.getLogger()
122
syslogger = None
95
syslogger = (logging.handlers.SysLogHandler
96
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
97
address = str("/dev/log")))
123
98
124
99
try:
125
if_nametoindex = ctypes.cdll.LoadLibrary(
126
ctypes.util.find_library("c")).if_nametoindex
100
if_nametoindex = (ctypes.cdll.LoadLibrary
101
(ctypes.util.find_library("c"))
102
.if_nametoindex)
127
103
except (OSError, AttributeError):
128
129
104
def if_nametoindex(interface):
130
105
"Get an interface index the hard way, i.e. using fcntl()"
131
106
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
132
107
with contextlib.closing(socket.socket()) as s:
133
108
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
134
struct.pack(b"16s16x", interface))
135
interface_index = struct.unpack("I", ifreq[16:20])[0]
109
struct.pack(str("16s16x"),
110
interface))
111
interface_index = struct.unpack(str("I"),
112
ifreq[16:20])[0]
136
113
return interface_index
137
114
138
115
139
def copy_function(func):
140
"""Make a copy of a function"""
141
if sys.version_info.major == 2:
142
return types.FunctionType(func.func_code,
143
func.func_globals,
144
func.func_name,
145
func.func_defaults,
146
func.func_closure)
147
else:
148
return types.FunctionType(func.__code__,
149
func.__globals__,
150
func.__name__,
151
func.__defaults__,
152
func.__closure__)
153
154
155
116
def initlogger(debug, level=logging.WARNING):
156
117
"""init logger and add loglevel"""
157
158
global syslogger
159
syslogger = (logging.handlers.SysLogHandler(
160
facility=logging.handlers.SysLogHandler.LOG_DAEMON,
161
address="/dev/log"))
118
162
119
syslogger.setFormatter(logging.Formatter
163
120
('Mandos [%(process)d]: %(levelname)s:'
164
121
' %(message)s'))
165
122
logger.addHandler(syslogger)
166
123
167
124
if debug:
168
125
console = logging.StreamHandler()
169
126
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
181
138
182
139
class PGPEngine(object):
183
140
"""A simple class for OpenPGP symmetric encryption & decryption"""
184
185
141
def __init__(self):
142
self.gnupg = GnuPGInterface.GnuPG()
186
143
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
187
self.gpg = "gpg"
188
try:
189
output = subprocess.check_output(["gpgconf"])
190
for line in output.splitlines():
191
name, text, path = line.split(b":")
192
if name == "gpg":
193
self.gpg = path
194
break
195
except OSError as e:
196
if e.errno != errno.ENOENT:
197
raise
198
self.gnupgargs = ['--batch',
199
'--homedir', self.tempdir,
200
'--force-mdc',
201
'--quiet']
202
# Only GPG version 1 has the --no-use-agent option.
203
if self.gpg == "gpg" or self.gpg.endswith("/gpg"):
204
self.gnupgargs.append("--no-use-agent")
205
144
self.gnupg = GnuPGInterface.GnuPG()
145
self.gnupg.options.meta_interactive = False
146
self.gnupg.options.homedir = self.tempdir
147
self.gnupg.options.extra_args.extend(['--force-mdc',
148
'--quiet',
149
'--no-use-agent'])
150
206
151
def __enter__(self):
207
152
return self
208
209
def __exit__(self, exc_type, exc_value, traceback):
153
154
def __exit__ (self, exc_type, exc_value, traceback):
210
155
self._cleanup()
211
156
return False
212
157
213
158
def __del__(self):
214
159
self._cleanup()
215
160
216
161
def _cleanup(self):
217
162
if self.tempdir is not None:
218
163
# Delete contents of tempdir
219
164
for root, dirs, files in os.walk(self.tempdir,
220
topdown=False):
165
topdown = False):
221
166
for filename in files:
222
167
os.remove(os.path.join(root, filename))
223
168
for dirname in dirs:
225
170
# Remove tempdir
226
171
os.rmdir(self.tempdir)
227
172
self.tempdir = None
228
173
229
174
def password_encode(self, password):
230
175
# Passphrase can not be empty and can not contain newlines or
231
176
# NUL bytes. So we prefix it and hex encode it.
232
encoded = b"mandos" + binascii.hexlify(password)
233
if len(encoded) > 2048:
234
# GnuPG can't handle long passwords, so encode differently
235
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
236
.replace(b"\n", b"\\n")
237
.replace(b"\0", b"\\x00"))
238
return encoded
239
177
return b"mandos" + binascii.hexlify(password)
178
240
179
def encrypt(self, data, password):
241
passphrase = self.password_encode(password)
242
with tempfile.NamedTemporaryFile(
243
dir=self.tempdir) as passfile:
244
passfile.write(passphrase)
245
passfile.flush()
246
proc = subprocess.Popen([self.gpg, '--symmetric',
247
'--passphrase-file',
248
passfile.name]
249
+ self.gnupgargs,
250
stdin=subprocess.PIPE,
251
stdout=subprocess.PIPE,
252
stderr=subprocess.PIPE)
253
ciphertext, err = proc.communicate(input=data)
254
if proc.returncode != 0:
255
raise PGPError(err)
180
self.gnupg.passphrase = self.password_encode(password)
181
with open(os.devnull, "w") as devnull:
182
try:
183
proc = self.gnupg.run(['--symmetric'],
184
create_fhs=['stdin', 'stdout'],
185
attach_fhs={'stderr': devnull})
186
with contextlib.closing(proc.handles['stdin']) as f:
187
f.write(data)
188
with contextlib.closing(proc.handles['stdout']) as f:
189
ciphertext = f.read()
190
proc.wait()
191
except IOError as e:
192
raise PGPError(e)
193
self.gnupg.passphrase = None
256
194
return ciphertext
257
195
258
196
def decrypt(self, data, password):
259
passphrase = self.password_encode(password)
260
with tempfile.NamedTemporaryFile(
261
dir=self.tempdir) as passfile:
262
passfile.write(passphrase)
263
passfile.flush()
264
proc = subprocess.Popen([self.gpg, '--decrypt',
265
'--passphrase-file',
266
passfile.name]
267
+ self.gnupgargs,
268
stdin=subprocess.PIPE,
269
stdout=subprocess.PIPE,
270
stderr=subprocess.PIPE)
271
decrypted_plaintext, err = proc.communicate(input=data)
272
if proc.returncode != 0:
273
raise PGPError(err)
197
self.gnupg.passphrase = self.password_encode(password)
198
with open(os.devnull, "w") as devnull:
199
try:
200
proc = self.gnupg.run(['--decrypt'],
201
create_fhs=['stdin', 'stdout'],
202
attach_fhs={'stderr': devnull})
203
with contextlib.closing(proc.handles['stdin']) as f:
204
f.write(data)
205
with contextlib.closing(proc.handles['stdout']) as f:
206
decrypted_plaintext = f.read()
207
proc.wait()
208
except IOError as e:
209
raise PGPError(e)
210
self.gnupg.passphrase = None
274
211
return decrypted_plaintext
275
212
276
213
277
# Pretend that we have an Avahi module
278
class Avahi(object):
279
"""This isn't so much a class as it is a module-like namespace.
280
It is instantiated once, and simulates having an Avahi module."""
281
IF_UNSPEC = -1 # avahi-common/address.h
282
PROTO_UNSPEC = -1 # avahi-common/address.h
283
PROTO_INET = 0 # avahi-common/address.h
284
PROTO_INET6 = 1 # avahi-common/address.h
285
DBUS_NAME = "org.freedesktop.Avahi"
286
DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"
287
DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"
288
DBUS_PATH_SERVER = "/"
289
290
def string_array_to_txt_array(self, t):
291
return dbus.Array((dbus.ByteArray(s.encode("utf-8"))
292
for s in t), signature="ay")
293
ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h
294
ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h
295
ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h
296
SERVER_INVALID = 0 # avahi-common/defs.h
297
SERVER_REGISTERING = 1 # avahi-common/defs.h
298
SERVER_RUNNING = 2 # avahi-common/defs.h
299
SERVER_COLLISION = 3 # avahi-common/defs.h
300
SERVER_FAILURE = 4 # avahi-common/defs.h
301
avahi = Avahi()
302
303
304
214
class AvahiError(Exception):
305
215
def __init__(self, value, *args, **kwargs):
306
216
self.value = value
307
return super(AvahiError, self).__init__(value, *args,
308
**kwargs)
309
217
super(AvahiError, self).__init__(value, *args, **kwargs)
218
def __unicode__(self):
219
return unicode(repr(self.value))
310
220
311
221
class AvahiServiceError(AvahiError):
312
222
pass
313
223
314
315
224
class AvahiGroupError(AvahiError):
316
225
pass
317
226
318
227
319
228
class AvahiService(object):
320
229
"""An Avahi (Zeroconf) service.
321
230
322
231
Attributes:
323
232
interface: integer; avahi.IF_UNSPEC or an interface index.
324
233
Used to optionally bind to the specified interface.
325
234
name: string; Example: 'Mandos'
326
235
type: string; Example: '_mandos._tcp'.
327
See <https://www.iana.org/assignments/service-names-port-numbers>
236
See <http://www.dns-sd.org/ServiceTypes.html>
328
237
port: integer; what port to announce
329
238
TXT: list of strings; TXT record for the service
330
239
domain: string; Domain to publish on, default to .local if empty.
336
245
server: D-Bus Server
337
246
bus: dbus.SystemBus()
338
247
"""
339
340
def __init__(self,
341
interface=avahi.IF_UNSPEC,
342
name=None,
343
servicetype=None,
344
port=None,
345
TXT=None,
346
domain="",
347
host="",
348
max_renames=32768,
349
protocol=avahi.PROTO_UNSPEC,
350
bus=None):
248
249
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
250
servicetype = None, port = None, TXT = None,
251
domain = "", host = "", max_renames = 32768,
252
protocol = avahi.PROTO_UNSPEC, bus = None):
351
253
self.interface = interface
352
254
self.name = name
353
255
self.type = servicetype
362
264
self.server = None
363
265
self.bus = bus
364
266
self.entry_group_state_changed_match = None
365
366
def rename(self, remove=True):
267
268
def rename(self):
367
269
"""Derived from the Avahi example code"""
368
270
if self.rename_count >= self.max_renames:
369
271
logger.critical("No suitable Zeroconf service name found"
370
272
" after %i retries, exiting.",
371
273
self.rename_count)
372
274
raise AvahiServiceError("Too many renames")
373
self.name = str(
374
self.server.GetAlternativeServiceName(self.name))
375
self.rename_count += 1
275
self.name = unicode(self.server
276
.GetAlternativeServiceName(self.name))
376
277
logger.info("Changing Zeroconf service name to %r ...",
377
278
self.name)
378
if remove:
379
self.remove()
279
self.remove()
380
280
try:
381
281
self.add()
382
282
except dbus.exceptions.DBusException as error:
383
if (error.get_dbus_name()
384
== "org.freedesktop.Avahi.CollisionError"):
385
logger.info("Local Zeroconf service name collision.")
386
return self.rename(remove=False)
387
else:
388
logger.critical("D-Bus Exception", exc_info=error)
389
self.cleanup()
390
os._exit(1)
391
283
logger.critical("D-Bus Exception", exc_info=error)
284
self.cleanup()
285
os._exit(1)
286
self.rename_count += 1
287
392
288
def remove(self):
393
289
"""Derived from the Avahi example code"""
394
290
if self.entry_group_state_changed_match is not None:
396
292
self.entry_group_state_changed_match = None
397
293
if self.group is not None:
398
294
self.group.Reset()
399
295
400
296
def add(self):
401
297
"""Derived from the Avahi example code"""
402
298
self.remove()
419
315
dbus.UInt16(self.port),
420
316
avahi.string_array_to_txt_array(self.TXT))
421
317
self.group.Commit()
422
318
423
319
def entry_group_state_changed(self, state, error):
424
320
"""Derived from the Avahi example code"""
425
321
logger.debug("Avahi entry group state change: %i", state)
426
322
427
323
if state == avahi.ENTRY_GROUP_ESTABLISHED:
428
324
logger.debug("Zeroconf service established.")
429
325
elif state == avahi.ENTRY_GROUP_COLLISION:
431
327
self.rename()
432
328
elif state == avahi.ENTRY_GROUP_FAILURE:
433
329
logger.critical("Avahi: Error in group state changed %s",
434
str(error))
435
raise AvahiGroupError("State changed: {!s}".format(error))
436
330
unicode(error))
331
raise AvahiGroupError("State changed: {0!s}"
332
.format(error))
333
437
334
def cleanup(self):
438
335
"""Derived from the Avahi example code"""
439
336
if self.group is not None:
444
341
pass
445
342
self.group = None
446
343
self.remove()
447
344
448
345
def server_state_changed(self, state, error=None):
449
346
"""Derived from the Avahi example code"""
450
347
logger.debug("Avahi server state change: %i", state)
451
bad_states = {
452
avahi.SERVER_INVALID: "Zeroconf server invalid",
453
avahi.SERVER_REGISTERING: None,
454
avahi.SERVER_COLLISION: "Zeroconf server name collision",
455
avahi.SERVER_FAILURE: "Zeroconf server failure",
456
}
348
bad_states = { avahi.SERVER_INVALID:
349
"Zeroconf server invalid",
350
avahi.SERVER_REGISTERING: None,
351
avahi.SERVER_COLLISION:
352
"Zeroconf server name collision",
353
avahi.SERVER_FAILURE:
354
"Zeroconf server failure" }
457
355
if state in bad_states:
458
356
if bad_states[state] is not None:
459
357
if error is None:
462
360
logger.error(bad_states[state] + ": %r", error)
463
361
self.cleanup()
464
362
elif state == avahi.SERVER_RUNNING:
465
try:
466
self.add()
467
except dbus.exceptions.DBusException as error:
468
if (error.get_dbus_name()
469
== "org.freedesktop.Avahi.CollisionError"):
470
logger.info("Local Zeroconf service name"
471
" collision.")
472
return self.rename(remove=False)
473
else:
474
logger.critical("D-Bus Exception", exc_info=error)
475
self.cleanup()
476
os._exit(1)
363
self.add()
477
364
else:
478
365
if error is None:
479
366
logger.debug("Unknown state: %r", state)
480
367
else:
481
368
logger.debug("Unknown state: %r: %r", state, error)
482
369
483
370
def activate(self):
484
371
"""Derived from the Avahi example code"""
485
372
if self.server is None:
489
376
follow_name_owner_changes=True),
490
377
avahi.DBUS_INTERFACE_SERVER)
491
378
self.server.connect_to_signal("StateChanged",
492
self.server_state_changed)
379
self.server_state_changed)
493
380
self.server_state_changed(self.server.GetState())
494
381
495
382
496
383
class AvahiServiceToSyslog(AvahiService):
497
def rename(self, *args, **kwargs):
384
def rename(self):
498
385
"""Add the new name to the syslog messages"""
499
ret = super(AvahiServiceToSyslog, self).rename(*args, **kwargs)
500
syslogger.setFormatter(logging.Formatter(
501
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
502
.format(self.name)))
386
ret = AvahiService.rename(self)
387
syslogger.setFormatter(logging.Formatter
388
('Mandos ({0}) [%(process)d]:'
389
' %(levelname)s: %(message)s'
390
.format(self.name)))
503
391
return ret
504
392
505
393
506
# Pretend that we have a GnuTLS module
507
class GnuTLS(object):
508
"""This isn't so much a class as it is a module-like namespace.
509
It is instantiated once, and simulates having a GnuTLS module."""
510
511
library = ctypes.util.find_library("gnutls")
512
if library is None:
513
library = ctypes.util.find_library("gnutls-deb0")
514
_library = ctypes.cdll.LoadLibrary(library)
515
del library
516
_need_version = b"3.3.0"
517
518
def __init__(self):
519
# Need to use "self" here, since this method is called before
520
# the assignment to the "gnutls" global variable happens.
521
if self.check_version(self._need_version) is None:
522
raise self.Error("Needs GnuTLS {} or later"
523
.format(self._need_version))
524
525
# Unless otherwise indicated, the constants and types below are
526
# all from the gnutls/gnutls.h C header file.
527
528
# Constants
529
E_SUCCESS = 0
530
E_INTERRUPTED = -52
531
E_AGAIN = -28
532
CRT_OPENPGP = 2
533
CLIENT = 2
534
SHUT_RDWR = 0
535
CRD_CERTIFICATE = 1
536
E_NO_CERTIFICATE_FOUND = -49
537
OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
538
539
# Types
540
class session_int(ctypes.Structure):
541
_fields_ = []
542
session_t = ctypes.POINTER(session_int)
543
544
class certificate_credentials_st(ctypes.Structure):
545
_fields_ = []
546
certificate_credentials_t = ctypes.POINTER(
547
certificate_credentials_st)
548
certificate_type_t = ctypes.c_int
549
550
class datum_t(ctypes.Structure):
551
_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
552
('size', ctypes.c_uint)]
553
554
class openpgp_crt_int(ctypes.Structure):
555
_fields_ = []
556
openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
557
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
558
log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
559
credentials_type_t = ctypes.c_int
560
transport_ptr_t = ctypes.c_void_p
561
close_request_t = ctypes.c_int
562
563
# Exceptions
564
class Error(Exception):
565
# We need to use the class name "GnuTLS" here, since this
566
# exception might be raised from within GnuTLS.__init__,
567
# which is called before the assignment to the "gnutls"
568
# global variable has happened.
569
def __init__(self, message=None, code=None, args=()):
570
# Default usage is by a message string, but if a return
571
# code is passed, convert it to a string with
572
# gnutls.strerror()
573
self.code = code
574
if message is None and code is not None:
575
message = GnuTLS.strerror(code)
576
return super(GnuTLS.Error, self).__init__(
577
message, *args)
578
579
class CertificateSecurityError(Error):
580
pass
581
582
# Classes
583
class Credentials(object):
584
def __init__(self):
585
self._c_object = gnutls.certificate_credentials_t()
586
gnutls.certificate_allocate_credentials(
587
ctypes.byref(self._c_object))
588
self.type = gnutls.CRD_CERTIFICATE
589
590
def __del__(self):
591
gnutls.certificate_free_credentials(self._c_object)
592
593
class ClientSession(object):
594
def __init__(self, socket, credentials=None):
595
self._c_object = gnutls.session_t()
596
gnutls.init(ctypes.byref(self._c_object), gnutls.CLIENT)
597
gnutls.set_default_priority(self._c_object)
598
gnutls.transport_set_ptr(self._c_object, socket.fileno())
599
gnutls.handshake_set_private_extensions(self._c_object,
600
True)
601
self.socket = socket
602
if credentials is None:
603
credentials = gnutls.Credentials()
604
gnutls.credentials_set(self._c_object, credentials.type,
605
ctypes.cast(credentials._c_object,
606
ctypes.c_void_p))
607
self.credentials = credentials
608
609
def __del__(self):
610
gnutls.deinit(self._c_object)
611
612
def handshake(self):
613
return gnutls.handshake(self._c_object)
614
615
def send(self, data):
616
data = bytes(data)
617
data_len = len(data)
618
while data_len > 0:
619
data_len -= gnutls.record_send(self._c_object,
620
data[-data_len:],
621
data_len)
622
623
def bye(self):
624
return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
625
626
# Error handling functions
627
def _error_code(result):
628
"""A function to raise exceptions on errors, suitable
629
for the 'restype' attribute on ctypes functions"""
630
if result >= 0:
631
return result
632
if result == gnutls.E_NO_CERTIFICATE_FOUND:
633
raise gnutls.CertificateSecurityError(code=result)
634
raise gnutls.Error(code=result)
635
636
def _retry_on_error(result, func, arguments):
637
"""A function to retry on some errors, suitable
638
for the 'errcheck' attribute on ctypes functions"""
639
while result < 0:
640
if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
641
return _error_code(result)
642
result = func(*arguments)
643
return result
644
645
# Unless otherwise indicated, the function declarations below are
646
# all from the gnutls/gnutls.h C header file.
647
648
# Functions
649
priority_set_direct = _library.gnutls_priority_set_direct
650
priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
651
ctypes.POINTER(ctypes.c_char_p)]
652
priority_set_direct.restype = _error_code
653
654
init = _library.gnutls_init
655
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
656
init.restype = _error_code
657
658
set_default_priority = _library.gnutls_set_default_priority
659
set_default_priority.argtypes = [session_t]
660
set_default_priority.restype = _error_code
661
662
record_send = _library.gnutls_record_send
663
record_send.argtypes = [session_t, ctypes.c_void_p,
664
ctypes.c_size_t]
665
record_send.restype = ctypes.c_ssize_t
666
record_send.errcheck = _retry_on_error
667
668
certificate_allocate_credentials = (
669
_library.gnutls_certificate_allocate_credentials)
670
certificate_allocate_credentials.argtypes = [
671
ctypes.POINTER(certificate_credentials_t)]
672
certificate_allocate_credentials.restype = _error_code
673
674
certificate_free_credentials = (
675
_library.gnutls_certificate_free_credentials)
676
certificate_free_credentials.argtypes = [
677
certificate_credentials_t]
678
certificate_free_credentials.restype = None
679
680
handshake_set_private_extensions = (
681
_library.gnutls_handshake_set_private_extensions)
682
handshake_set_private_extensions.argtypes = [session_t,
683
ctypes.c_int]
684
handshake_set_private_extensions.restype = None
685
686
credentials_set = _library.gnutls_credentials_set
687
credentials_set.argtypes = [session_t, credentials_type_t,
688
ctypes.c_void_p]
689
credentials_set.restype = _error_code
690
691
strerror = _library.gnutls_strerror
692
strerror.argtypes = [ctypes.c_int]
693
strerror.restype = ctypes.c_char_p
694
695
certificate_type_get = _library.gnutls_certificate_type_get
696
certificate_type_get.argtypes = [session_t]
697
certificate_type_get.restype = _error_code
698
699
certificate_get_peers = _library.gnutls_certificate_get_peers
700
certificate_get_peers.argtypes = [session_t,
701
ctypes.POINTER(ctypes.c_uint)]
702
certificate_get_peers.restype = ctypes.POINTER(datum_t)
703
704
global_set_log_level = _library.gnutls_global_set_log_level
705
global_set_log_level.argtypes = [ctypes.c_int]
706
global_set_log_level.restype = None
707
708
global_set_log_function = _library.gnutls_global_set_log_function
709
global_set_log_function.argtypes = [log_func]
710
global_set_log_function.restype = None
711
712
deinit = _library.gnutls_deinit
713
deinit.argtypes = [session_t]
714
deinit.restype = None
715
716
handshake = _library.gnutls_handshake
717
handshake.argtypes = [session_t]
718
handshake.restype = _error_code
719
handshake.errcheck = _retry_on_error
720
721
transport_set_ptr = _library.gnutls_transport_set_ptr
722
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
723
transport_set_ptr.restype = None
724
725
bye = _library.gnutls_bye
726
bye.argtypes = [session_t, close_request_t]
727
bye.restype = _error_code
728
bye.errcheck = _retry_on_error
729
730
check_version = _library.gnutls_check_version
731
check_version.argtypes = [ctypes.c_char_p]
732
check_version.restype = ctypes.c_char_p
733
734
# All the function declarations below are from gnutls/openpgp.h
735
736
openpgp_crt_init = _library.gnutls_openpgp_crt_init
737
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
738
openpgp_crt_init.restype = _error_code
739
740
openpgp_crt_import = _library.gnutls_openpgp_crt_import
741
openpgp_crt_import.argtypes = [openpgp_crt_t,
742
ctypes.POINTER(datum_t),
743
openpgp_crt_fmt_t]
744
openpgp_crt_import.restype = _error_code
745
746
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
747
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
748
ctypes.POINTER(ctypes.c_uint)]
749
openpgp_crt_verify_self.restype = _error_code
750
751
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
752
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
753
openpgp_crt_deinit.restype = None
754
755
openpgp_crt_get_fingerprint = (
756
_library.gnutls_openpgp_crt_get_fingerprint)
757
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
758
ctypes.c_void_p,
759
ctypes.POINTER(
760
ctypes.c_size_t)]
761
openpgp_crt_get_fingerprint.restype = _error_code
762
763
# Remove non-public functions
764
del _error_code, _retry_on_error
765
# Create the global "gnutls" object, simulating a module
766
gnutls = GnuTLS()
767
768
769
def call_pipe(connection, # : multiprocessing.Connection
770
func, *args, **kwargs):
771
"""This function is meant to be called by multiprocessing.Process
772
773
This function runs func(*args, **kwargs), and writes the resulting
774
return value on the provided multiprocessing.Connection.
775
"""
776
connection.send(func(*args, **kwargs))
777
connection.close()
394
def timedelta_to_milliseconds(td):
395
"Convert a datetime.timedelta() to milliseconds"
396
return ((td.days * 24 * 60 * 60 * 1000)
397
+ (td.seconds * 1000)
398
+ (td.microseconds // 1000))
778
399
779
400
780
401
class Client(object):
781
402
"""A representation of a client host served by this server.
782
403
783
404
Attributes:
784
405
approved: bool(); 'None' if not yet approved/disapproved
785
406
approval_delay: datetime.timedelta(); Time to wait for approval
787
408
checker: subprocess.Popen(); a running checker process used
788
409
to see if the client lives.
789
410
'None' if no process is running.
790
checker_callback_tag: a GLib event source tag, or None
411
checker_callback_tag: a gobject event source tag, or None
791
412
checker_command: string; External command which is run to check
792
413
if client lives. %() expansions are done at
793
414
runtime with vars(self) as dict, so that for
794
415
instance %(name)s can be used in the command.
795
checker_initiator_tag: a GLib event source tag, or None
416
checker_initiator_tag: a gobject event source tag, or None
796
417
created: datetime.datetime(); (UTC) object creation
797
418
client_structure: Object describing what attributes a client has
798
419
and is used for storing the client at exit
799
420
current_checker_command: string; current running checker_command
800
disable_initiator_tag: a GLib event source tag, or None
421
disable_initiator_tag: a gobject event source tag, or None
801
422
enabled: bool()
802
423
fingerprint: string (40 or 32 hexadecimal digits); used to
803
424
uniquely identify the client
808
429
last_checker_status: integer between 0 and 255 reflecting exit
809
430
status of last checker. -1 reflects crashed
810
431
checker, -2 means no checker completed yet.
811
last_checker_signal: The signal which killed the last checker, if
812
last_checker_status is -1
813
432
last_enabled: datetime.datetime(); (UTC) or None
814
433
name: string; from the config file, used in log messages and
815
434
D-Bus identifiers
820
439
runtime_expansions: Allowed attributes for runtime expansion.
821
440
expires: datetime.datetime(); time (UTC) when a client will be
822
441
disabled, or None
823
server_settings: The server_settings dict from main()
824
442
"""
825
443
826
444
runtime_expansions = ("approval_delay", "approval_duration",
827
445
"created", "enabled", "expires",
828
446
"fingerprint", "host", "interval",
829
447
"last_approval_request", "last_checked_ok",
830
448
"last_enabled", "name", "timeout")
831
client_defaults = {
832
"timeout": "PT5M",
833
"extended_timeout": "PT15M",
834
"interval": "PT2M",
835
"checker": "fping -q -- %%(host)s",
836
"host": "",
837
"approval_delay": "PT0S",
838
"approval_duration": "PT1S",
839
"approved_by_default": "True",
840
"enabled": "True",
841
}
842
449
client_defaults = { "timeout": "5m",
450
"extended_timeout": "15m",
451
"interval": "2m",
452
"checker": "fping -q -- %%(host)s",
453
"host": "",
454
"approval_delay": "0s",
455
"approval_duration": "1s",
456
"approved_by_default": "True",
457
"enabled": "True",
458
}
459
460
def timeout_milliseconds(self):
461
"Return the 'timeout' attribute in milliseconds"
462
return timedelta_to_milliseconds(self.timeout)
463
464
def extended_timeout_milliseconds(self):
465
"Return the 'extended_timeout' attribute in milliseconds"
466
return timedelta_to_milliseconds(self.extended_timeout)
467
468
def interval_milliseconds(self):
469
"Return the 'interval' attribute in milliseconds"
470
return timedelta_to_milliseconds(self.interval)
471
472
def approval_delay_milliseconds(self):
473
return timedelta_to_milliseconds(self.approval_delay)
474
843
475
@staticmethod
844
476
def config_parser(config):
845
477
"""Construct a new dict of client settings of this form:
852
484
for client_name in config.sections():
853
485
section = dict(config.items(client_name))
854
486
client = settings[client_name] = {}
855
487
856
488
client["host"] = section["host"]
857
489
# Reformat values from string types to Python types
858
490
client["approved_by_default"] = config.getboolean(
859
491
client_name, "approved_by_default")
860
492
client["enabled"] = config.getboolean(client_name,
861
493
"enabled")
862
863
# Uppercase and remove spaces from fingerprint for later
864
# comparison purposes with return value from the
865
# fingerprint() function
494
866
495
client["fingerprint"] = (section["fingerprint"].upper()
867
496
.replace(" ", ""))
868
497
if "secret" in section:
869
client["secret"] = codecs.decode(section["secret"]
870
.encode("utf-8"),
871
"base64")
498
client["secret"] = section["secret"].decode("base64")
872
499
elif "secfile" in section:
873
500
with open(os.path.expanduser(os.path.expandvars
874
501
(section["secfile"])),
875
502
"rb") as secfile:
876
503
client["secret"] = secfile.read()
877
504
else:
878
raise TypeError("No secret or secfile for section {}"
505
raise TypeError("No secret or secfile for section {0}"
879
506
.format(section))
880
507
client["timeout"] = string_to_delta(section["timeout"])
881
508
client["extended_timeout"] = string_to_delta(
889
516
client["last_approval_request"] = None
890
517
client["last_checked_ok"] = None
891
518
client["last_checker_status"] = -2
892
519
893
520
return settings
894
895
def __init__(self, settings, name=None, server_settings=None):
521
522
def __init__(self, settings, name = None):
896
523
self.name = name
897
if server_settings is None:
898
server_settings = {}
899
self.server_settings = server_settings
900
524
# adding all client settings
901
for setting, value in settings.items():
525
for setting, value in settings.iteritems():
902
526
setattr(self, setting, value)
903
527
904
528
if self.enabled:
905
529
if not hasattr(self, "last_enabled"):
906
530
self.last_enabled = datetime.datetime.utcnow()
910
534
else:
911
535
self.last_enabled = None
912
536
self.expires = None
913
537
914
538
logger.debug("Creating client %r", self.name)
539
# Uppercase and remove spaces from fingerprint for later
540
# comparison purposes with return value from the fingerprint()
541
# function
915
542
logger.debug(" Fingerprint: %s", self.fingerprint)
916
543
self.created = settings.get("created",
917
544
datetime.datetime.utcnow())
918
545
919
546
# attributes specific for this server instance
920
547
self.checker = None
921
548
self.checker_initiator_tag = None
924
551
self.current_checker_command = None
925
552
self.approved = None
926
553
self.approvals_pending = 0
927
self.changedstate = multiprocessing_manager.Condition(
928
multiprocessing_manager.Lock())
929
self.client_structure = [attr
930
for attr in self.__dict__.keys()
554
self.changedstate = (multiprocessing_manager
555
.Condition(multiprocessing_manager
556
.Lock()))
557
self.client_structure = [attr for attr in
558
self.__dict__.iterkeys()
931
559
if not attr.startswith("_")]
932
560
self.client_structure.append("client_structure")
933
934
for name, t in inspect.getmembers(
935
type(self), lambda obj: isinstance(obj, property)):
561
562
for name, t in inspect.getmembers(type(self),
563
lambda obj:
564
isinstance(obj,
565
property)):
936
566
if not name.startswith("_"):
937
567
self.client_structure.append(name)
938
568
939
569
# Send notice to process children that client state has changed
940
570
def send_changedstate(self):
941
571
with self.changedstate:
942
572
self.changedstate.notify_all()
943
573
944
574
def enable(self):
945
575
"""Start this client's checker and timeout hooks"""
946
576
if getattr(self, "enabled", False):
951
581
self.last_enabled = datetime.datetime.utcnow()
952
582
self.init_checker()
953
583
self.send_changedstate()
954
584
955
585
def disable(self, quiet=True):
956
586
"""Disable this client."""
957
587
if not getattr(self, "enabled", False):
959
589
if not quiet:
960
590
logger.info("Disabling client %s", self.name)
961
591
if getattr(self, "disable_initiator_tag", None) is not None:
962
GLib.source_remove(self.disable_initiator_tag)
592
gobject.source_remove(self.disable_initiator_tag)
963
593
self.disable_initiator_tag = None
964
594
self.expires = None
965
595
if getattr(self, "checker_initiator_tag", None) is not None:
966
GLib.source_remove(self.checker_initiator_tag)
596
gobject.source_remove(self.checker_initiator_tag)
967
597
self.checker_initiator_tag = None
968
598
self.stop_checker()
969
599
self.enabled = False
970
600
if not quiet:
971
601
self.send_changedstate()
972
# Do not run this again if called by a GLib.timeout_add
602
# Do not run this again if called by a gobject.timeout_add
973
603
return False
974
604
975
605
def __del__(self):
976
606
self.disable()
977
607
978
608
def init_checker(self):
979
609
# Schedule a new checker to be started an 'interval' from now,
980
610
# and every interval from then on.
981
611
if self.checker_initiator_tag is not None:
982
GLib.source_remove(self.checker_initiator_tag)
983
self.checker_initiator_tag = GLib.timeout_add(
984
int(self.interval.total_seconds() * 1000),
985
self.start_checker)
612
gobject.source_remove(self.checker_initiator_tag)
613
self.checker_initiator_tag = (gobject.timeout_add
614
(self.interval_milliseconds(),
615
self.start_checker))
986
616
# Schedule a disable() when 'timeout' has passed
987
617
if self.disable_initiator_tag is not None:
988
GLib.source_remove(self.disable_initiator_tag)
989
self.disable_initiator_tag = GLib.timeout_add(
990
int(self.timeout.total_seconds() * 1000), self.disable)
618
gobject.source_remove(self.disable_initiator_tag)
619
self.disable_initiator_tag = (gobject.timeout_add
620
(self.timeout_milliseconds(),
621
self.disable))
991
622
# Also start a new checker *right now*.
992
623
self.start_checker()
993
994
def checker_callback(self, source, condition, connection,
995
command):
624
625
def checker_callback(self, pid, condition, command):
996
626
"""The checker has completed, so take appropriate actions."""
997
627
self.checker_callback_tag = None
998
628
self.checker = None
999
# Read return code from connection (see call_pipe)
1000
returncode = connection.recv()
1001
connection.close()
1002
1003
if returncode >= 0:
1004
self.last_checker_status = returncode
1005
self.last_checker_signal = None
629
if os.WIFEXITED(condition):
630
self.last_checker_status = os.WEXITSTATUS(condition)
1006
631
if self.last_checker_status == 0:
1007
632
logger.info("Checker for %(name)s succeeded",
1008
633
vars(self))
1009
634
self.checked_ok()
1010
635
else:
1011
logger.info("Checker for %(name)s failed", vars(self))
636
logger.info("Checker for %(name)s failed",
637
vars(self))
1012
638
else:
1013
639
self.last_checker_status = -1
1014
self.last_checker_signal = -returncode
1015
640
logger.warning("Checker for %(name)s crashed?",
1016
641
vars(self))
1017
return False
1018
642
1019
643
def checked_ok(self):
1020
644
"""Assert that the client has been seen, alive and well."""
1021
645
self.last_checked_ok = datetime.datetime.utcnow()
1022
646
self.last_checker_status = 0
1023
self.last_checker_signal = None
1024
647
self.bump_timeout()
1025
648
1026
649
def bump_timeout(self, timeout=None):
1027
650
"""Bump up the timeout for this client."""
1028
651
if timeout is None:
1029
652
timeout = self.timeout
1030
653
if self.disable_initiator_tag is not None:
1031
GLib.source_remove(self.disable_initiator_tag)
654
gobject.source_remove(self.disable_initiator_tag)
1032
655
self.disable_initiator_tag = None
1033
656
if getattr(self, "enabled", False):
1034
self.disable_initiator_tag = GLib.timeout_add(
1035
int(timeout.total_seconds() * 1000), self.disable)
657
self.disable_initiator_tag = (gobject.timeout_add
658
(timedelta_to_milliseconds
659
(timeout), self.disable))
1036
660
self.expires = datetime.datetime.utcnow() + timeout
1037
661
1038
662
def need_approval(self):
1039
663
self.last_approval_request = datetime.datetime.utcnow()
1040
664
1041
665
def start_checker(self):
1042
666
"""Start a new checker subprocess if one is not running.
1043
667
1044
668
If a checker already exists, leave it running and do
1045
669
nothing."""
1046
670
# The reason for not killing a running checker is that if we
1051
675
# checkers alone, the checker would have to take more time
1052
676
# than 'timeout' for the client to be disabled, which is as it
1053
677
# should be.
1054
1055
if self.checker is not None and not self.checker.is_alive():
1056
logger.warning("Checker was not alive; joining")
1057
self.checker.join()
1058
self.checker = None
678
679
# If a checker exists, make sure it is not a zombie
680
try:
681
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
682
except (AttributeError, OSError) as error:
683
if (isinstance(error, OSError)
684
and error.errno != errno.ECHILD):
685
raise error
686
else:
687
if pid:
688
logger.warning("Checker was a zombie")
689
gobject.source_remove(self.checker_callback_tag)
690
self.checker_callback(pid, status,
691
self.current_checker_command)
1059
692
# Start a new checker if needed
1060
693
if self.checker is None:
1061
694
# Escape attributes for the shell
1062
escaped_attrs = {
1063
attr: re.escape(str(getattr(self, attr)))
1064
for attr in self.runtime_expansions}
695
escaped_attrs = dict(
696
(attr, re.escape(unicode(getattr(self, attr))))
697
for attr in
698
self.runtime_expansions)
1065
699
try:
1066
700
command = self.checker_command % escaped_attrs
1067
701
except TypeError as error:
1068
702
logger.error('Could not format string "%s"',
1069
self.checker_command,
703
self.checker_command, exc_info=error)
704
return True # Try again later
705
self.current_checker_command = command
706
try:
707
logger.info("Starting checker %r for %s",
708
command, self.name)
709
# We don't need to redirect stdout and stderr, since
710
# in normal mode, that is already done by daemon(),
711
# and in debug mode we don't want to. (Stdin is
712
# always replaced by /dev/null.)
713
self.checker = subprocess.Popen(command,
714
close_fds=True,
715
shell=True, cwd="/")
716
except OSError as error:
717
logger.error("Failed to start subprocess",
1070
718
exc_info=error)
1071
return True # Try again later
1072
self.current_checker_command = command
1073
logger.info("Starting checker %r for %s", command,
1074
self.name)
1075
# We don't need to redirect stdout and stderr, since
1076
# in normal mode, that is already done by daemon(),
1077
# and in debug mode we don't want to. (Stdin is
1078
# always replaced by /dev/null.)
1079
# The exception is when not debugging but nevertheless
1080
# running in the foreground; use the previously
1081
# created wnull.
1082
popen_args = {"close_fds": True,
1083
"shell": True,
1084
"cwd": "/"}
1085
if (not self.server_settings["debug"]
1086
and self.server_settings["foreground"]):
1087
popen_args.update({"stdout": wnull,
1088
"stderr": wnull})
1089
pipe = multiprocessing.Pipe(duplex=False)
1090
self.checker = multiprocessing.Process(
1091
target=call_pipe,
1092
args=(pipe[1], subprocess.call, command),
1093
kwargs=popen_args)
1094
self.checker.start()
1095
self.checker_callback_tag = GLib.io_add_watch(
1096
pipe[0].fileno(), GLib.IO_IN,
1097
self.checker_callback, pipe[0], command)
1098
# Re-run this periodically if run by GLib.timeout_add
719
self.checker_callback_tag = (gobject.child_watch_add
720
(self.checker.pid,
721
self.checker_callback,
722
data=command))
723
# The checker may have completed before the gobject
724
# watch was added. Check for this.
725
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
726
if pid:
727
gobject.source_remove(self.checker_callback_tag)
728
self.checker_callback(pid, status, command)
729
# Re-run this periodically if run by gobject.timeout_add
1099
730
return True
1100
731
1101
732
def stop_checker(self):
1102
733
"""Force the checker process, if any, to stop."""
1103
734
if self.checker_callback_tag:
1104
GLib.source_remove(self.checker_callback_tag)
735
gobject.source_remove(self.checker_callback_tag)
1105
736
self.checker_callback_tag = None
1106
737
if getattr(self, "checker", None) is None:
1107
738
return
1108
739
logger.debug("Stopping checker for %(name)s", vars(self))
1109
self.checker.terminate()
740
try:
741
self.checker.terminate()
742
#time.sleep(0.5)
743
#if self.checker.poll() is None:
744
# self.checker.kill()
745
except OSError as error:
746
if error.errno != errno.ESRCH: # No such process
747
raise
1110
748
self.checker = None
1111
749
1112
750
1113
def dbus_service_property(dbus_interface,
1114
signature="v",
1115
access="readwrite",
1116
byte_arrays=False):
751
def dbus_service_property(dbus_interface, signature="v",
752
access="readwrite", byte_arrays=False):
1117
753
"""Decorators for marking methods of a DBusObjectWithProperties to
1118
754
become properties on the D-Bus.
1119
755
1120
756
The decorated method will be called with no arguments by "Get"
1121
757
and with one argument by "Set".
1122
758
1123
759
The parameters, where they are supported, are the same as
1124
760
dbus.service.method, except there is only "signature", since the
1125
761
type from Get() and the type sent to Set() is the same.
1128
764
# "Set" method, so we fail early here:
1129
765
if byte_arrays and signature != "ay":
1130
766
raise ValueError("Byte arrays not supported for non-'ay'"
1131
" signature {!r}".format(signature))
1132
767
" signature {0!r}".format(signature))
1133
768
def decorator(func):
1134
769
func._dbus_is_property = True
1135
770
func._dbus_interface = dbus_interface
1138
773
func._dbus_name = func.__name__
1139
774
if func._dbus_name.endswith("_dbus_property"):
1140
775
func._dbus_name = func._dbus_name[:-14]
1141
func._dbus_get_args_options = {'byte_arrays': byte_arrays}
776
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
1142
777
return func
1143
1144
778
return decorator
1145
779
1146
780
1147
781
def dbus_interface_annotations(dbus_interface):
1148
782
"""Decorator for marking functions returning interface annotations
1149
783
1150
784
Usage:
1151
785
1152
786
@dbus_interface_annotations("org.example.Interface")
1153
787
def _foo(self): # Function name does not matter
1154
788
return {"org.freedesktop.DBus.Deprecated": "true",
1155
789
"org.freedesktop.DBus.Property.EmitsChangedSignal":
1156
790
"false"}
1157
791
"""
1158
1159
792
def decorator(func):
1160
793
func._dbus_is_interface = True
1161
794
func._dbus_interface = dbus_interface
1162
795
func._dbus_name = dbus_interface
1163
796
return func
1164
1165
797
return decorator
1166
798
1167
799
1168
800
def dbus_annotations(annotations):
1169
801
"""Decorator to annotate D-Bus methods, signals or properties
1170
802
Usage:
1171
1172
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
1173
"org.freedesktop.DBus.Property."
1174
"EmitsChangedSignal": "false"})
803
1175
804
@dbus_service_property("org.example.Interface", signature="b",
1176
805
access="r")
806
@dbus_annotations({{"org.freedesktop.DBus.Deprecated": "true",
807
"org.freedesktop.DBus.Property."
808
"EmitsChangedSignal": "false"})
1177
809
def Property_dbus_property(self):
1178
810
return dbus.Boolean(False)
1179
1180
See also the DBusObjectWithAnnotations class.
1181
811
"""
1182
1183
812
def decorator(func):
1184
813
func._dbus_annotations = annotations
1185
814
return func
1186
1187
815
return decorator
1188
816
1189
817
1190
818
class DBusPropertyException(dbus.exceptions.DBusException):
1191
819
"""A base class for D-Bus property-related exceptions
1192
820
"""
1193
pass
821
def __unicode__(self):
822
return unicode(str(self))
1194
823
1195
824
1196
825
class DBusPropertyAccessException(DBusPropertyException):
1205
834
pass
1206
835
1207
836
1208
class DBusObjectWithAnnotations(dbus.service.Object):
1209
"""A D-Bus object with annotations.
1210
1211
Classes inheriting from this can use the dbus_annotations
1212
decorator to add annotations to methods or signals.
837
class DBusObjectWithProperties(dbus.service.Object):
838
"""A D-Bus object with properties.
839
840
Classes inheriting from this can use the dbus_service_property
841
decorator to expose methods as D-Bus properties. It exposes the
842
standard Get(), Set(), and GetAll() methods on the D-Bus.
1213
843
"""
1214
844
1215
845
@staticmethod
1216
846
def _is_dbus_thing(thing):
1217
847
"""Returns a function testing if an attribute is a D-Bus thing
1218
848
1219
849
If called like _is_dbus_thing("method") it returns a function
1220
850
suitable for use as predicate to inspect.getmembers().
1221
851
"""
1222
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
852
return lambda obj: getattr(obj, "_dbus_is_{0}".format(thing),
1223
853
False)
1224
854
1225
855
def _get_all_dbus_things(self, thing):
1226
856
"""Returns a generator of (name, attribute) pairs
1227
857
"""
1228
return ((getattr(athing.__get__(self), "_dbus_name", name),
858
return ((getattr(athing.__get__(self), "_dbus_name",
859
name),
1229
860
athing.__get__(self))
1230
861
for cls in self.__class__.__mro__
1231
862
for name, athing in
1232
inspect.getmembers(cls, self._is_dbus_thing(thing)))
1233
1234
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1235
out_signature="s",
1236
path_keyword='object_path',
1237
connection_keyword='connection')
1238
def Introspect(self, object_path, connection):
1239
"""Overloading of standard D-Bus method.
1240
1241
Inserts annotation tags on methods and signals.
1242
"""
1243
xmlstring = dbus.service.Object.Introspect(self, object_path,
1244
connection)
1245
try:
1246
document = xml.dom.minidom.parseString(xmlstring)
1247
1248
for if_tag in document.getElementsByTagName("interface"):
1249
# Add annotation tags
1250
for typ in ("method", "signal"):
1251
for tag in if_tag.getElementsByTagName(typ):
1252
annots = dict()
1253
for name, prop in (self.
1254
_get_all_dbus_things(typ)):
1255
if (name == tag.getAttribute("name")
1256
and prop._dbus_interface
1257
== if_tag.getAttribute("name")):
1258
annots.update(getattr(
1259
prop, "_dbus_annotations", {}))
1260
for name, value in annots.items():
1261
ann_tag = document.createElement(
1262
"annotation")
1263
ann_tag.setAttribute("name", name)
1264
ann_tag.setAttribute("value", value)
1265
tag.appendChild(ann_tag)
1266
# Add interface annotation tags
1267
for annotation, value in dict(
1268
itertools.chain.from_iterable(
1269
annotations().items()
1270
for name, annotations
1271
in self._get_all_dbus_things("interface")
1272
if name == if_tag.getAttribute("name")
1273
)).items():
1274
ann_tag = document.createElement("annotation")
1275
ann_tag.setAttribute("name", annotation)
1276
ann_tag.setAttribute("value", value)
1277
if_tag.appendChild(ann_tag)
1278
# Fix argument name for the Introspect method itself
1279
if (if_tag.getAttribute("name")
1280
== dbus.INTROSPECTABLE_IFACE):
1281
for cn in if_tag.getElementsByTagName("method"):
1282
if cn.getAttribute("name") == "Introspect":
1283
for arg in cn.getElementsByTagName("arg"):
1284
if (arg.getAttribute("direction")
1285
== "out"):
1286
arg.setAttribute("name",
1287
"xml_data")
1288
xmlstring = document.toxml("utf-8")
1289
document.unlink()
1290
except (AttributeError, xml.dom.DOMException,
1291
xml.parsers.expat.ExpatError) as error:
1292
logger.error("Failed to override Introspection method",
1293
exc_info=error)
1294
return xmlstring
1295
1296
1297
class DBusObjectWithProperties(DBusObjectWithAnnotations):
1298
"""A D-Bus object with properties.
1299
1300
Classes inheriting from this can use the dbus_service_property
1301
decorator to expose methods as D-Bus properties. It exposes the
1302
standard Get(), Set(), and GetAll() methods on the D-Bus.
1303
"""
1304
863
inspect.getmembers(cls,
864
self._is_dbus_thing(thing)))
865
1305
866
def _get_dbus_property(self, interface_name, property_name):
1306
867
"""Returns a bound method if one exists which is a D-Bus
1307
868
property with the specified name and interface.
1308
869
"""
1309
for cls in self.__class__.__mro__:
1310
for name, value in inspect.getmembers(
1311
cls, self._is_dbus_thing("property")):
870
for cls in self.__class__.__mro__:
871
for name, value in (inspect.getmembers
872
(cls,
873
self._is_dbus_thing("property"))):
1312
874
if (value._dbus_name == property_name
1313
875
and value._dbus_interface == interface_name):
1314
876
return value.__get__(self)
1315
877
1316
878
# No such property
1317
raise DBusPropertyNotFound("{}:{}.{}".format(
1318
self.dbus_object_path, interface_name, property_name))
1319
1320
@classmethod
1321
def _get_all_interface_names(cls):
1322
"""Get a sequence of all interfaces supported by an object"""
1323
return (name for name in set(getattr(getattr(x, attr),
1324
"_dbus_interface", None)
1325
for x in (inspect.getmro(cls))
1326
for attr in dir(x))
1327
if name is not None)
1328
1329
@dbus.service.method(dbus.PROPERTIES_IFACE,
1330
in_signature="ss",
879
raise DBusPropertyNotFound(self.dbus_object_path + ":"
880
+ interface_name + "."
881
+ property_name)
882
883
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
1331
884
out_signature="v")
1332
885
def Get(self, interface_name, property_name):
1333
886
"""Standard D-Bus property Get() method, see D-Bus standard.
1339
892
if not hasattr(value, "variant_level"):
1340
893
return value
1341
894
return type(value)(value, variant_level=value.variant_level+1)
1342
895
1343
896
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
1344
897
def Set(self, interface_name, property_name, value):
1345
898
"""Standard D-Bus property Set() method, see D-Bus standard.
1351
904
# The byte_arrays option is not supported yet on
1352
905
# signatures other than "ay".
1353
906
if prop._dbus_signature != "ay":
1354
raise ValueError("Byte arrays not supported for non-"
1355
"'ay' signature {!r}"
1356
.format(prop._dbus_signature))
907
raise ValueError
1357
908
value = dbus.ByteArray(b''.join(chr(byte)
1358
909
for byte in value))
1359
910
prop(value)
1360
1361
@dbus.service.method(dbus.PROPERTIES_IFACE,
1362
in_signature="s",
911
912
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
1363
913
out_signature="a{sv}")
1364
914
def GetAll(self, interface_name):
1365
915
"""Standard D-Bus property GetAll() method, see D-Bus
1366
916
standard.
1367
917
1368
918
Note: Will not include properties with access="write".
1369
919
"""
1370
920
properties = {}
1380
930
if not hasattr(value, "variant_level"):
1381
931
properties[name] = value
1382
932
continue
1383
properties[name] = type(value)(
1384
value, variant_level=value.variant_level + 1)
933
properties[name] = type(value)(value, variant_level=
934
value.variant_level+1)
1385
935
return dbus.Dictionary(properties, signature="sv")
1386
1387
@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
1388
def PropertiesChanged(self, interface_name, changed_properties,
1389
invalidated_properties):
1390
"""Standard D-Bus PropertiesChanged() signal, see D-Bus
1391
standard.
1392
"""
1393
pass
1394
936
1395
937
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1396
938
out_signature="s",
1397
939
path_keyword='object_path',
1398
940
connection_keyword='connection')
1399
941
def Introspect(self, object_path, connection):
1400
942
"""Overloading of standard D-Bus method.
1401
943
1402
944
Inserts property tags and interface annotation tags.
1403
945
"""
1404
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1405
object_path,
1406
connection)
946
xmlstring = dbus.service.Object.Introspect(self, object_path,
947
connection)
1407
948
try:
1408
949
document = xml.dom.minidom.parseString(xmlstring)
1409
1410
950
def make_tag(document, name, prop):
1411
951
e = document.createElement("property")
1412
952
e.setAttribute("name", name)
1413
953
e.setAttribute("type", prop._dbus_signature)
1414
954
e.setAttribute("access", prop._dbus_access)
1415
955
return e
1416
1417
956
for if_tag in document.getElementsByTagName("interface"):
1418
957
# Add property tags
1419
958
for tag in (make_tag(document, name, prop)
1422
961
if prop._dbus_interface
1423
962
== if_tag.getAttribute("name")):
1424
963
if_tag.appendChild(tag)
1425
# Add annotation tags for properties
1426
for tag in if_tag.getElementsByTagName("property"):
1427
annots = dict()
1428
for name, prop in self._get_all_dbus_things(
1429
"property"):
1430
if (name == tag.getAttribute("name")
1431
and prop._dbus_interface
1432
== if_tag.getAttribute("name")):
1433
annots.update(getattr(
1434
prop, "_dbus_annotations", {}))
1435
for name, value in annots.items():
1436
ann_tag = document.createElement(
1437
"annotation")
1438
ann_tag.setAttribute("name", name)
1439
ann_tag.setAttribute("value", value)
1440
tag.appendChild(ann_tag)
964
# Add annotation tags
965
for typ in ("method", "signal", "property"):
966
for tag in if_tag.getElementsByTagName(typ):
967
annots = dict()
968
for name, prop in (self.
969
_get_all_dbus_things(typ)):
970
if (name == tag.getAttribute("name")
971
and prop._dbus_interface
972
== if_tag.getAttribute("name")):
973
annots.update(getattr
974
(prop,
975
"_dbus_annotations",
976
{}))
977
for name, value in annots.iteritems():
978
ann_tag = document.createElement(
979
"annotation")
980
ann_tag.setAttribute("name", name)
981
ann_tag.setAttribute("value", value)
982
tag.appendChild(ann_tag)
983
# Add interface annotation tags
984
for annotation, value in dict(
985
itertools.chain.from_iterable(
986
annotations().iteritems()
987
for name, annotations in
988
self._get_all_dbus_things("interface")
989
if name == if_tag.getAttribute("name")
990
)).iteritems():
991
ann_tag = document.createElement("annotation")
992
ann_tag.setAttribute("name", annotation)
993
ann_tag.setAttribute("value", value)
994
if_tag.appendChild(ann_tag)
1441
995
# Add the names to the return values for the
1442
996
# "org.freedesktop.DBus.Properties" methods
1443
997
if (if_tag.getAttribute("name")
1462
1016
return xmlstring
1463
1017
1464
1018
1465
try:
1466
dbus.OBJECT_MANAGER_IFACE
1467
except AttributeError:
1468
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1469
1470
1471
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1472
"""A D-Bus object with an ObjectManager.
1473
1474
Classes inheriting from this exposes the standard
1475
GetManagedObjects call and the InterfacesAdded and
1476
InterfacesRemoved signals on the standard
1477
"org.freedesktop.DBus.ObjectManager" interface.
1478
1479
Note: No signals are sent automatically; they must be sent
1480
manually.
1481
"""
1482
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1483
out_signature="a{oa{sa{sv}}}")
1484
def GetManagedObjects(self):
1485
"""This function must be overridden"""
1486
raise NotImplementedError()
1487
1488
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1489
signature="oa{sa{sv}}")
1490
def InterfacesAdded(self, object_path, interfaces_and_properties):
1491
pass
1492
1493
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1494
def InterfacesRemoved(self, object_path, interfaces):
1495
pass
1496
1497
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1498
out_signature="s",
1499
path_keyword='object_path',
1500
connection_keyword='connection')
1501
def Introspect(self, object_path, connection):
1502
"""Overloading of standard D-Bus method.
1503
1504
Override return argument name of GetManagedObjects to be
1505
"objpath_interfaces_and_properties"
1506
"""
1507
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1508
object_path,
1509
connection)
1510
try:
1511
document = xml.dom.minidom.parseString(xmlstring)
1512
1513
for if_tag in document.getElementsByTagName("interface"):
1514
# Fix argument name for the GetManagedObjects method
1515
if (if_tag.getAttribute("name")
1516
== dbus.OBJECT_MANAGER_IFACE):
1517
for cn in if_tag.getElementsByTagName("method"):
1518
if (cn.getAttribute("name")
1519
== "GetManagedObjects"):
1520
for arg in cn.getElementsByTagName("arg"):
1521
if (arg.getAttribute("direction")
1522
== "out"):
1523
arg.setAttribute(
1524
"name",
1525
"objpath_interfaces"
1526
"_and_properties")
1527
xmlstring = document.toxml("utf-8")
1528
document.unlink()
1529
except (AttributeError, xml.dom.DOMException,
1530
xml.parsers.expat.ExpatError) as error:
1531
logger.error("Failed to override Introspection method",
1532
exc_info=error)
1533
return xmlstring
1534
1535
1536
def datetime_to_dbus(dt, variant_level=0):
1019
def datetime_to_dbus (dt, variant_level=0):
1537
1020
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1538
1021
if dt is None:
1539
return dbus.String("", variant_level=variant_level)
1540
return dbus.String(dt.isoformat(), variant_level=variant_level)
1022
return dbus.String("", variant_level = variant_level)
1023
return dbus.String(dt.isoformat(),
1024
variant_level=variant_level)
1541
1025
1542
1026
1543
1027
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1545
1029
dbus.service.Object, it will add alternate D-Bus attributes with
1546
1030
interface names according to the "alt_interface_names" mapping.
1547
1031
Usage:
1548
1549
@alternate_dbus_interfaces({"org.example.Interface":
1550
"net.example.AlternateInterface"})
1032
1033
@alternate_dbus_names({"org.example.Interface":
1034
"net.example.AlternateInterface"})
1551
1035
class SampleDBusObject(dbus.service.Object):
1552
1036
@dbus.service.method("org.example.Interface")
1553
1037
def SampleDBusMethod():
1554
1038
pass
1555
1039
1556
1040
The above "SampleDBusMethod" on "SampleDBusObject" will be
1557
1041
reachable via two interfaces: "org.example.Interface" and
1558
1042
"net.example.AlternateInterface", the latter of which will have
1559
1043
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1560
1044
"true", unless "deprecate" is passed with a False value.
1561
1045
1562
1046
This works for methods and signals, and also for D-Bus properties
1563
1047
(from DBusObjectWithProperties) and interfaces (from the
1564
1048
dbus_interface_annotations decorator).
1565
1049
"""
1566
1567
1050
def wrapper(cls):
1568
1051
for orig_interface_name, alt_interface_name in (
1569
alt_interface_names.items()):
1052
alt_interface_names.iteritems()):
1570
1053
attr = {}
1571
1054
interface_names = set()
1572
1055
# Go though all attributes of the class
1574
1057
# Ignore non-D-Bus attributes, and D-Bus attributes
1575
1058
# with the wrong interface name
1576
1059
if (not hasattr(attribute, "_dbus_interface")
1577
or not attribute._dbus_interface.startswith(
1578
orig_interface_name)):
1060
or not attribute._dbus_interface
1061
.startswith(orig_interface_name)):
1579
1062
continue
1580
1063
# Create an alternate D-Bus interface name based on
1581
1064
# the current name
1582
alt_interface = attribute._dbus_interface.replace(
1583
orig_interface_name, alt_interface_name)
1065
alt_interface = (attribute._dbus_interface
1066
.replace(orig_interface_name,
1067
alt_interface_name))
1584
1068
interface_names.add(alt_interface)
1585
1069
# Is this a D-Bus signal?
1586
1070
if getattr(attribute, "_dbus_is_signal", False):
1587
# Extract the original non-method undecorated
1588
# function by black magic
1589
if sys.version_info.major == 2:
1590
nonmethod_func = (dict(
1071
# Extract the original non-method function by
1072
# black magic
1073
nonmethod_func = (dict(
1591
1074
zip(attribute.func_code.co_freevars,
1592
attribute.__closure__))
1593
["func"].cell_contents)
1594
else:
1595
nonmethod_func = (dict(
1596
zip(attribute.__code__.co_freevars,
1597
attribute.__closure__))
1598
["func"].cell_contents)
1075
attribute.__closure__))["func"]
1076
.cell_contents)
1599
1077
# Create a new, but exactly alike, function
1600
1078
# object, and decorate it to be a new D-Bus signal
1601
1079
# with the alternate D-Bus interface name
1602
new_function = copy_function(nonmethod_func)
1603
new_function = (dbus.service.signal(
1604
alt_interface,
1605
attribute._dbus_signature)(new_function))
1080
new_function = (dbus.service.signal
1081
(alt_interface,
1082
attribute._dbus_signature)
1083
(types.FunctionType(
1084
nonmethod_func.func_code,
1085
nonmethod_func.func_globals,
1086
nonmethod_func.func_name,
1087
nonmethod_func.func_defaults,
1088
nonmethod_func.func_closure)))
1606
1089
# Copy annotations, if any
1607
1090
try:
1608
new_function._dbus_annotations = dict(
1609
attribute._dbus_annotations)
1091
new_function._dbus_annotations = (
1092
dict(attribute._dbus_annotations))
1610
1093
except AttributeError:
1611
1094
pass
1612
1613
1095
# Define a creator of a function to call both the
1614
1096
# original and alternate functions, so both the
1615
1097
# original and alternate signals gets sent when
1618
1100
"""This function is a scope container to pass
1619
1101
func1 and func2 to the "call_both" function
1620
1102
outside of its arguments"""
1621
1622
@functools.wraps(func2)
1623
1103
def call_both(*args, **kwargs):
1624
1104
"""This function will emit two D-Bus
1625
1105
signals by calling func1 and func2"""
1626
1106
func1(*args, **kwargs)
1627
1107
func2(*args, **kwargs)
1628
# Make wrapper function look like a D-Bus
1629
# signal
1630
for name, attr in inspect.getmembers(func2):
1631
if name.startswith("_dbus_"):
1632
setattr(call_both, name, attr)
1633
1634
1108
return call_both
1635
1109
# Create the "call_both" function and add it to
1636
1110
# the class
1641
1115
# object. Decorate it to be a new D-Bus method
1642
1116
# with the alternate D-Bus interface name. Add it
1643
1117
# to the class.
1644
attr[attrname] = (
1645
dbus.service.method(
1646
alt_interface,
1647
attribute._dbus_in_signature,
1648
attribute._dbus_out_signature)
1649
(copy_function(attribute)))
1118
attr[attrname] = (dbus.service.method
1119
(alt_interface,
1120
attribute._dbus_in_signature,
1121
attribute._dbus_out_signature)
1122
(types.FunctionType
1123
(attribute.func_code,
1124
attribute.func_globals,
1125
attribute.func_name,
1126
attribute.func_defaults,
1127
attribute.func_closure)))
1650
1128
# Copy annotations, if any
1651
1129
try:
1652
attr[attrname]._dbus_annotations = dict(
1653
attribute._dbus_annotations)
1130
attr[attrname]._dbus_annotations = (
1131
dict(attribute._dbus_annotations))
1654
1132
except AttributeError:
1655
1133
pass
1656
1134
# Is this a D-Bus property?
1659
1137
# object, and decorate it to be a new D-Bus
1660
1138
# property with the alternate D-Bus interface
1661
1139
# name. Add it to the class.
1662
attr[attrname] = (dbus_service_property(
1663
alt_interface, attribute._dbus_signature,
1664
attribute._dbus_access,
1665
attribute._dbus_get_args_options
1666
["byte_arrays"])
1667
(copy_function(attribute)))
1140
attr[attrname] = (dbus_service_property
1141
(alt_interface,
1142
attribute._dbus_signature,
1143
attribute._dbus_access,
1144
attribute
1145
._dbus_get_args_options
1146
["byte_arrays"])
1147
(types.FunctionType
1148
(attribute.func_code,
1149
attribute.func_globals,
1150
attribute.func_name,
1151
attribute.func_defaults,
1152
attribute.func_closure)))
1668
1153
# Copy annotations, if any
1669
1154
try:
1670
attr[attrname]._dbus_annotations = dict(
1671
attribute._dbus_annotations)
1155
attr[attrname]._dbus_annotations = (
1156
dict(attribute._dbus_annotations))
1672
1157
except AttributeError:
1673
1158
pass
1674
1159
# Is this a D-Bus interface?
1677
1162
# object. Decorate it to be a new D-Bus interface
1678
1163
# with the alternate D-Bus interface name. Add it
1679
1164
# to the class.
1680
attr[attrname] = (
1681
dbus_interface_annotations(alt_interface)
1682
(copy_function(attribute)))
1165
attr[attrname] = (dbus_interface_annotations
1166
(alt_interface)
1167
(types.FunctionType
1168
(attribute.func_code,
1169
attribute.func_globals,
1170
attribute.func_name,
1171
attribute.func_defaults,
1172
attribute.func_closure)))
1683
1173
if deprecate:
1684
1174
# Deprecate all alternate interfaces
1685
iname = "_AlternateDBusNames_interface_annotation{}"
1175
iname="_AlternateDBusNames_interface_annotation{0}"
1686
1176
for interface_name in interface_names:
1687
1688
1177
@dbus_interface_annotations(interface_name)
1689
1178
def func(self):
1690
return {"org.freedesktop.DBus.Deprecated":
1691
"true"}
1179
return { "org.freedesktop.DBus.Deprecated":
1180
"true" }
1692
1181
# Find an unused name
1693
1182
for aname in (iname.format(i)
1694
1183
for i in itertools.count()):
1698
1187
if interface_names:
1699
1188
# Replace the class with a new subclass of it with
1700
1189
# methods, signals, etc. as created above.
1701
if sys.version_info.major == 2:
1702
cls = type(b"{}Alternate".format(cls.__name__),
1703
(cls, ), attr)
1704
else:
1705
cls = type("{}Alternate".format(cls.__name__),
1706
(cls, ), attr)
1190
cls = type(b"{0}Alternate".format(cls.__name__),
1191
(cls,), attr)
1707
1192
return cls
1708
1709
1193
return wrapper
1710
1194
1711
1195
1712
1196
@alternate_dbus_interfaces({"se.recompile.Mandos":
1713
"se.bsnet.fukt.Mandos"})
1197
"se.bsnet.fukt.Mandos"})
1714
1198
class ClientDBus(Client, DBusObjectWithProperties):
1715
1199
"""A Client class using D-Bus
1716
1200
1717
1201
Attributes:
1718
1202
dbus_object_path: dbus.ObjectPath
1719
1203
bus: dbus.SystemBus()
1720
1204
"""
1721
1205
1722
1206
runtime_expansions = (Client.runtime_expansions
1723
+ ("dbus_object_path", ))
1724
1725
_interface = "se.recompile.Mandos.Client"
1726
1207
+ ("dbus_object_path",))
1208
1727
1209
# dbus.service.Object doesn't use super(), so we can't either.
1728
1729
def __init__(self, bus=None, *args, **kwargs):
1210
1211
def __init__(self, bus = None, *args, **kwargs):
1730
1212
self.bus = bus
1731
1213
Client.__init__(self, *args, **kwargs)
1732
1214
# Only now, when this client is initialized, can it show up on
1733
1215
# the D-Bus
1734
client_object_name = str(self.name).translate(
1216
client_object_name = unicode(self.name).translate(
1735
1217
{ord("."): ord("_"),
1736
1218
ord("-"): ord("_")})
1737
self.dbus_object_path = dbus.ObjectPath(
1738
"/clients/" + client_object_name)
1219
self.dbus_object_path = (dbus.ObjectPath
1220
("/clients/" + client_object_name))
1739
1221
DBusObjectWithProperties.__init__(self, self.bus,
1740
1222
self.dbus_object_path)
1741
1742
def notifychangeproperty(transform_func, dbus_name,
1743
type_func=lambda x: x,
1744
variant_level=1,
1745
invalidate_only=False,
1746
_interface=_interface):
1223
1224
def notifychangeproperty(transform_func,
1225
dbus_name, type_func=lambda x: x,
1226
variant_level=1):
1747
1227
""" Modify a variable so that it's a property which announces
1748
1228
its changes to DBus.
1749
1229
1750
1230
transform_fun: Function that takes a value and a variant_level
1751
1231
and transforms it to a D-Bus type.
1752
1232
dbus_name: D-Bus name of the variable
1754
1234
to the D-Bus. Default: no transform
1755
1235
variant_level: D-Bus variant level. Default: 1
1756
1236
"""
1757
attrname = "_{}".format(dbus_name)
1758
1237
attrname = "_{0}".format(dbus_name)
1759
1238
def setter(self, value):
1760
1239
if hasattr(self, "dbus_object_path"):
1761
1240
if (not hasattr(self, attrname) or
1762
1241
type_func(getattr(self, attrname, None))
1763
1242
!= type_func(value)):
1764
if invalidate_only:
1765
self.PropertiesChanged(
1766
_interface, dbus.Dictionary(),
1767
dbus.Array((dbus_name, )))
1768
else:
1769
dbus_value = transform_func(
1770
type_func(value),
1771
variant_level=variant_level)
1772
self.PropertyChanged(dbus.String(dbus_name),
1773
dbus_value)
1774
self.PropertiesChanged(
1775
_interface,
1776
dbus.Dictionary({dbus.String(dbus_name):
1777
dbus_value}),
1778
dbus.Array())
1243
dbus_value = transform_func(type_func(value),
1244
variant_level
1245
=variant_level)
1246
self.PropertyChanged(dbus.String(dbus_name),
1247
dbus_value)
1779
1248
setattr(self, attrname, value)
1780
1249
1781
1250
return property(lambda self: getattr(self, attrname), setter)
1782
1251
1783
1252
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1784
1253
approvals_pending = notifychangeproperty(dbus.Boolean,
1785
1254
"ApprovalPending",
1786
type_func=bool)
1255
type_func = bool)
1787
1256
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1788
1257
last_enabled = notifychangeproperty(datetime_to_dbus,
1789
1258
"LastEnabled")
1790
checker = notifychangeproperty(
1791
dbus.Boolean, "CheckerRunning",
1792
type_func=lambda checker: checker is not None)
1259
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1260
type_func = lambda checker:
1261
checker is not None)
1793
1262
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1794
1263
"LastCheckedOK")
1795
1264
last_checker_status = notifychangeproperty(dbus.Int16,
1798
1267
datetime_to_dbus, "LastApprovalRequest")
1799
1268
approved_by_default = notifychangeproperty(dbus.Boolean,
1800
1269
"ApprovedByDefault")
1801
approval_delay = notifychangeproperty(
1802
dbus.UInt64, "ApprovalDelay",
1803
type_func=lambda td: td.total_seconds() * 1000)
1270
approval_delay = notifychangeproperty(dbus.UInt64,
1271
"ApprovalDelay",
1272
type_func =
1273
timedelta_to_milliseconds)
1804
1274
approval_duration = notifychangeproperty(
1805
1275
dbus.UInt64, "ApprovalDuration",
1806
type_func=lambda td: td.total_seconds() * 1000)
1276
type_func = timedelta_to_milliseconds)
1807
1277
host = notifychangeproperty(dbus.String, "Host")
1808
timeout = notifychangeproperty(
1809
dbus.UInt64, "Timeout",
1810
type_func=lambda td: td.total_seconds() * 1000)
1278
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1279
type_func =
1280
timedelta_to_milliseconds)
1811
1281
extended_timeout = notifychangeproperty(
1812
1282
dbus.UInt64, "ExtendedTimeout",
1813
type_func=lambda td: td.total_seconds() * 1000)
1814
interval = notifychangeproperty(
1815
dbus.UInt64, "Interval",
1816
type_func=lambda td: td.total_seconds() * 1000)
1283
type_func = timedelta_to_milliseconds)
1284
interval = notifychangeproperty(dbus.UInt64,
1285
"Interval",
1286
type_func =
1287
timedelta_to_milliseconds)
1817
1288
checker_command = notifychangeproperty(dbus.String, "Checker")
1818
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1819
invalidate_only=True)
1820
1289
1821
1290
del notifychangeproperty
1822
1291
1823
1292
def __del__(self, *args, **kwargs):
1824
1293
try:
1825
1294
self.remove_from_connection()
1828
1297
if hasattr(DBusObjectWithProperties, "__del__"):
1829
1298
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1830
1299
Client.__del__(self, *args, **kwargs)
1831
1832
def checker_callback(self, source, condition,
1833
connection, command, *args, **kwargs):
1834
ret = Client.checker_callback(self, source, condition,
1835
connection, command, *args,
1836
**kwargs)
1837
exitstatus = self.last_checker_status
1838
if exitstatus >= 0:
1300
1301
def checker_callback(self, pid, condition, command,
1302
*args, **kwargs):
1303
self.checker_callback_tag = None
1304
self.checker = None
1305
if os.WIFEXITED(condition):
1306
exitstatus = os.WEXITSTATUS(condition)
1839
1307
# Emit D-Bus signal
1840
1308
self.CheckerCompleted(dbus.Int16(exitstatus),
1841
# This is specific to GNU libC
1842
dbus.Int64(exitstatus << 8),
1309
dbus.Int64(condition),
1843
1310
dbus.String(command))
1844
1311
else:
1845
1312
# Emit D-Bus signal
1846
1313
self.CheckerCompleted(dbus.Int16(-1),
1847
dbus.Int64(
1848
# This is specific to GNU libC
1849
(exitstatus << 8)
1850
| self.last_checker_signal),
1314
dbus.Int64(condition),
1851
1315
dbus.String(command))
1852
return ret
1853
1316
1317
return Client.checker_callback(self, pid, condition, command,
1318
*args, **kwargs)
1319
1854
1320
def start_checker(self, *args, **kwargs):
1855
old_checker_pid = getattr(self.checker, "pid", None)
1321
old_checker = self.checker
1322
if self.checker is not None:
1323
old_checker_pid = self.checker.pid
1324
else:
1325
old_checker_pid = None
1856
1326
r = Client.start_checker(self, *args, **kwargs)
1857
1327
# Only if new checker process was started
1858
1328
if (self.checker is not None
1860
1330
# Emit D-Bus signal
1861
1331
self.CheckerStarted(self.current_checker_command)
1862
1332
return r
1863
1333
1864
1334
def _reset_approved(self):
1865
1335
self.approved = None
1866
1336
return False
1867
1337
1868
1338
def approve(self, value=True):
1869
1339
self.approved = value
1870
GLib.timeout_add(int(self.approval_duration.total_seconds()
1871
* 1000), self._reset_approved)
1340
gobject.timeout_add(timedelta_to_milliseconds
1341
(self.approval_duration),
1342
self._reset_approved)
1872
1343
self.send_changedstate()
1873
1874
# D-Bus methods, signals & properties
1875
1876
# Interfaces
1877
1878
# Signals
1879
1344
1345
## D-Bus methods, signals & properties
1346
_interface = "se.recompile.Mandos.Client"
1347
1348
## Interfaces
1349
1350
@dbus_interface_annotations(_interface)
1351
def _foo(self):
1352
return { "org.freedesktop.DBus.Property.EmitsChangedSignal":
1353
"false"}
1354
1355
## Signals
1356
1880
1357
# CheckerCompleted - signal
1881
1358
@dbus.service.signal(_interface, signature="nxs")
1882
1359
def CheckerCompleted(self, exitcode, waitstatus, command):
1883
1360
"D-Bus signal"
1884
1361
pass
1885
1362
1886
1363
# CheckerStarted - signal
1887
1364
@dbus.service.signal(_interface, signature="s")
1888
1365
def CheckerStarted(self, command):
1889
1366
"D-Bus signal"
1890
1367
pass
1891
1368
1892
1369
# PropertyChanged - signal
1893
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1894
1370
@dbus.service.signal(_interface, signature="sv")
1895
1371
def PropertyChanged(self, property, value):
1896
1372
"D-Bus signal"
1897
1373
pass
1898
1374
1899
1375
# GotSecret - signal
1900
1376
@dbus.service.signal(_interface)
1901
1377
def GotSecret(self):
1904
1380
server to mandos-client
1905
1381
"""
1906
1382
pass
1907
1383
1908
1384
# Rejected - signal
1909
1385
@dbus.service.signal(_interface, signature="s")
1910
1386
def Rejected(self, reason):
1911
1387
"D-Bus signal"
1912
1388
pass
1913
1389
1914
1390
# NeedApproval - signal
1915
1391
@dbus.service.signal(_interface, signature="tb")
1916
1392
def NeedApproval(self, timeout, default):
1917
1393
"D-Bus signal"
1918
1394
return self.need_approval()
1919
1920
# Methods
1921
1395
1396
## Methods
1397
1922
1398
# Approve - method
1923
1399
@dbus.service.method(_interface, in_signature="b")
1924
1400
def Approve(self, value):
1925
1401
self.approve(value)
1926
1402
1927
1403
# CheckedOK - method
1928
1404
@dbus.service.method(_interface)
1929
1405
def CheckedOK(self):
1930
1406
self.checked_ok()
1931
1407
1932
1408
# Enable - method
1933
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1934
1409
@dbus.service.method(_interface)
1935
1410
def Enable(self):
1936
1411
"D-Bus method"
1937
1412
self.enable()
1938
1413
1939
1414
# StartChecker - method
1940
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1941
1415
@dbus.service.method(_interface)
1942
1416
def StartChecker(self):
1943
1417
"D-Bus method"
1944
1418
self.start_checker()
1945
1419
1946
1420
# Disable - method
1947
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1948
1421
@dbus.service.method(_interface)
1949
1422
def Disable(self):
1950
1423
"D-Bus method"
1951
1424
self.disable()
1952
1425
1953
1426
# StopChecker - method
1954
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1955
1427
@dbus.service.method(_interface)
1956
1428
def StopChecker(self):
1957
1429
self.stop_checker()
1958
1959
# Properties
1960
1430
1431
## Properties
1432
1961
1433
# ApprovalPending - property
1962
1434
@dbus_service_property(_interface, signature="b", access="read")
1963
1435
def ApprovalPending_dbus_property(self):
1964
1436
return dbus.Boolean(bool(self.approvals_pending))
1965
1437
1966
1438
# ApprovedByDefault - property
1967
@dbus_service_property(_interface,
1968
signature="b",
1439
@dbus_service_property(_interface, signature="b",
1969
1440
access="readwrite")
1970
1441
def ApprovedByDefault_dbus_property(self, value=None):
1971
1442
if value is None: # get
1972
1443
return dbus.Boolean(self.approved_by_default)
1973
1444
self.approved_by_default = bool(value)
1974
1445
1975
1446
# ApprovalDelay - property
1976
@dbus_service_property(_interface,
1977
signature="t",
1447
@dbus_service_property(_interface, signature="t",
1978
1448
access="readwrite")
1979
1449
def ApprovalDelay_dbus_property(self, value=None):
1980
1450
if value is None: # get
1981
return dbus.UInt64(self.approval_delay.total_seconds()
1982
* 1000)
1451
return dbus.UInt64(self.approval_delay_milliseconds())
1983
1452
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1984
1453
1985
1454
# ApprovalDuration - property
1986
@dbus_service_property(_interface,
1987
signature="t",
1455
@dbus_service_property(_interface, signature="t",
1988
1456
access="readwrite")
1989
1457
def ApprovalDuration_dbus_property(self, value=None):
1990
1458
if value is None: # get
1991
return dbus.UInt64(self.approval_duration.total_seconds()
1992
* 1000)
1459
return dbus.UInt64(timedelta_to_milliseconds(
1460
self.approval_duration))
1993
1461
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1994
1462
1995
1463
# Name - property
1996
@dbus_annotations(
1997
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1998
1464
@dbus_service_property(_interface, signature="s", access="read")
1999
1465
def Name_dbus_property(self):
2000
1466
return dbus.String(self.name)
2001
1467
2002
1468
# Fingerprint - property
2003
@dbus_annotations(
2004
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2005
1469
@dbus_service_property(_interface, signature="s", access="read")
2006
1470
def Fingerprint_dbus_property(self):
2007
1471
return dbus.String(self.fingerprint)
2008
1472
2009
1473
# Host - property
2010
@dbus_service_property(_interface,
2011
signature="s",
1474
@dbus_service_property(_interface, signature="s",
2012
1475
access="readwrite")
2013
1476
def Host_dbus_property(self, value=None):
2014
1477
if value is None: # get
2015
1478
return dbus.String(self.host)
2016
self.host = str(value)
2017
1479
self.host = unicode(value)
1480
2018
1481
# Created - property
2019
@dbus_annotations(
2020
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2021
1482
@dbus_service_property(_interface, signature="s", access="read")
2022
1483
def Created_dbus_property(self):
2023
1484
return datetime_to_dbus(self.created)
2024
1485
2025
1486
# LastEnabled - property
2026
1487
@dbus_service_property(_interface, signature="s", access="read")
2027
1488
def LastEnabled_dbus_property(self):
2028
1489
return datetime_to_dbus(self.last_enabled)
2029
1490
2030
1491
# Enabled - property
2031
@dbus_service_property(_interface,
2032
signature="b",
1492
@dbus_service_property(_interface, signature="b",
2033
1493
access="readwrite")
2034
1494
def Enabled_dbus_property(self, value=None):
2035
1495
if value is None: # get
2038
1498
self.enable()
2039
1499
else:
2040
1500
self.disable()
2041
1501
2042
1502
# LastCheckedOK - property
2043
@dbus_service_property(_interface,
2044
signature="s",
1503
@dbus_service_property(_interface, signature="s",
2045
1504
access="readwrite")
2046
1505
def LastCheckedOK_dbus_property(self, value=None):
2047
1506
if value is not None:
2048
1507
self.checked_ok()
2049
1508
return
2050
1509
return datetime_to_dbus(self.last_checked_ok)
2051
1510
2052
1511
# LastCheckerStatus - property
2053
@dbus_service_property(_interface, signature="n", access="read")
1512
@dbus_service_property(_interface, signature="n",
1513
access="read")
2054
1514
def LastCheckerStatus_dbus_property(self):
2055
1515
return dbus.Int16(self.last_checker_status)
2056
1516
2057
1517
# Expires - property
2058
1518
@dbus_service_property(_interface, signature="s", access="read")
2059
1519
def Expires_dbus_property(self):
2060
1520
return datetime_to_dbus(self.expires)
2061
1521
2062
1522
# LastApprovalRequest - property
2063
1523
@dbus_service_property(_interface, signature="s", access="read")
2064
1524
def LastApprovalRequest_dbus_property(self):
2065
1525
return datetime_to_dbus(self.last_approval_request)
2066
1526
2067
1527
# Timeout - property
2068
@dbus_service_property(_interface,
2069
signature="t",
1528
@dbus_service_property(_interface, signature="t",
2070
1529
access="readwrite")
2071
1530
def Timeout_dbus_property(self, value=None):
2072
1531
if value is None: # get
2073
return dbus.UInt64(self.timeout.total_seconds() * 1000)
1532
return dbus.UInt64(self.timeout_milliseconds())
2074
1533
old_timeout = self.timeout
2075
1534
self.timeout = datetime.timedelta(0, 0, 0, value)
2076
1535
# Reschedule disabling
2084
1543
if (getattr(self, "disable_initiator_tag", None)
2085
1544
is None):
2086
1545
return
2087
GLib.source_remove(self.disable_initiator_tag)
2088
self.disable_initiator_tag = GLib.timeout_add(
2089
int((self.expires - now).total_seconds() * 1000),
2090
self.disable)
2091
1546
gobject.source_remove(self.disable_initiator_tag)
1547
self.disable_initiator_tag = (
1548
gobject.timeout_add(
1549
timedelta_to_milliseconds(self.expires - now),
1550
self.disable))
1551
2092
1552
# ExtendedTimeout - property
2093
@dbus_service_property(_interface,
2094
signature="t",
1553
@dbus_service_property(_interface, signature="t",
2095
1554
access="readwrite")
2096
1555
def ExtendedTimeout_dbus_property(self, value=None):
2097
1556
if value is None: # get
2098
return dbus.UInt64(self.extended_timeout.total_seconds()
2099
* 1000)
1557
return dbus.UInt64(self.extended_timeout_milliseconds())
2100
1558
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
2101
1559
2102
1560
# Interval - property
2103
@dbus_service_property(_interface,
2104
signature="t",
1561
@dbus_service_property(_interface, signature="t",
2105
1562
access="readwrite")
2106
1563
def Interval_dbus_property(self, value=None):
2107
1564
if value is None: # get
2108
return dbus.UInt64(self.interval.total_seconds() * 1000)
1565
return dbus.UInt64(self.interval_milliseconds())
2109
1566
self.interval = datetime.timedelta(0, 0, 0, value)
2110
1567
if getattr(self, "checker_initiator_tag", None) is None:
2111
1568
return
2112
1569
if self.enabled:
2113
1570
# Reschedule checker run
2114
GLib.source_remove(self.checker_initiator_tag)
2115
self.checker_initiator_tag = GLib.timeout_add(
2116
value, self.start_checker)
2117
self.start_checker() # Start one now, too
2118
1571
gobject.source_remove(self.checker_initiator_tag)
1572
self.checker_initiator_tag = (gobject.timeout_add
1573
(value, self.start_checker))
1574
self.start_checker() # Start one now, too
1575
2119
1576
# Checker - property
2120
@dbus_service_property(_interface,
2121
signature="s",
1577
@dbus_service_property(_interface, signature="s",
2122
1578
access="readwrite")
2123
1579
def Checker_dbus_property(self, value=None):
2124
1580
if value is None: # get
2125
1581
return dbus.String(self.checker_command)
2126
self.checker_command = str(value)
2127
1582
self.checker_command = unicode(value)
1583
2128
1584
# CheckerRunning - property
2129
@dbus_service_property(_interface,
2130
signature="b",
1585
@dbus_service_property(_interface, signature="b",
2131
1586
access="readwrite")
2132
1587
def CheckerRunning_dbus_property(self, value=None):
2133
1588
if value is None: # get
2136
1591
self.start_checker()
2137
1592
else:
2138
1593
self.stop_checker()
2139
1594
2140
1595
# ObjectPath - property
2141
@dbus_annotations(
2142
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
2143
"org.freedesktop.DBus.Deprecated": "true"})
2144
1596
@dbus_service_property(_interface, signature="o", access="read")
2145
1597
def ObjectPath_dbus_property(self):
2146
return self.dbus_object_path # is already a dbus.ObjectPath
2147
1598
return self.dbus_object_path # is already a dbus.ObjectPath
1599
2148
1600
# Secret = property
2149
@dbus_annotations(
2150
{"org.freedesktop.DBus.Property.EmitsChangedSignal":
2151
"invalidates"})
2152
@dbus_service_property(_interface,
2153
signature="ay",
2154
access="write",
2155
byte_arrays=True)
1601
@dbus_service_property(_interface, signature="ay",
1602
access="write", byte_arrays=True)
2156
1603
def Secret_dbus_property(self, value):
2157
self.secret = bytes(value)
2158
1604
self.secret = str(value)
1605
2159
1606
del _interface
2160
1607
2161
1608
2164
1611
self._pipe = child_pipe
2165
1612
self._pipe.send(('init', fpr, address))
2166
1613
if not self._pipe.recv():
2167
raise KeyError(fpr)
2168
1614
raise KeyError()
1615
2169
1616
def __getattribute__(self, name):
2170
1617
if name == '_pipe':
2171
1618
return super(ProxyClient, self).__getattribute__(name)
2174
1621
if data[0] == 'data':
2175
1622
return data[1]
2176
1623
if data[0] == 'function':
2177
2178
1624
def func(*args, **kwargs):
2179
1625
self._pipe.send(('funcall', name, args, kwargs))
2180
1626
return self._pipe.recv()[1]
2181
2182
1627
return func
2183
1628
2184
1629
def __setattr__(self, name, value):
2185
1630
if name == '_pipe':
2186
1631
return super(ProxyClient, self).__setattr__(name, value)
2189
1634
2190
1635
class ClientHandler(socketserver.BaseRequestHandler, object):
2191
1636
"""A class to handle client connections.
2192
1637
2193
1638
Instantiated once for each connection to handle it.
2194
1639
Note: This will run in its own forked process."""
2195
1640
2196
1641
def handle(self):
2197
1642
with contextlib.closing(self.server.child_pipe) as child_pipe:
2198
1643
logger.info("TCP connection from: %s",
2199
str(self.client_address))
1644
unicode(self.client_address))
2200
1645
logger.debug("Pipe FD: %d",
2201
1646
self.server.child_pipe.fileno())
2202
2203
session = gnutls.ClientSession(self.request)
2204
2205
# priority = ':'.join(("NONE", "+VERS-TLS1.1",
2206
# "+AES-256-CBC", "+SHA1",
2207
# "+COMP-NULL", "+CTYPE-OPENPGP",
2208
# "+DHE-DSS"))
1647
1648
session = (gnutls.connection
1649
.ClientSession(self.request,
1650
gnutls.connection
1651
.X509Credentials()))
1652
1653
# Note: gnutls.connection.X509Credentials is really a
1654
# generic GnuTLS certificate credentials object so long as
1655
# no X.509 keys are added to it. Therefore, we can use it
1656
# here despite using OpenPGP certificates.
1657
1658
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1659
# "+AES-256-CBC", "+SHA1",
1660
# "+COMP-NULL", "+CTYPE-OPENPGP",
1661
# "+DHE-DSS"))
2209
1662
# Use a fallback default, since this MUST be set.
2210
1663
priority = self.server.gnutls_priority
2211
1664
if priority is None:
2212
1665
priority = "NORMAL"
2213
gnutls.priority_set_direct(session._c_object,
2214
priority.encode("utf-8"),
2215
None)
2216
1666
(gnutls.library.functions
1667
.gnutls_priority_set_direct(session._c_object,
1668
priority, None))
1669
2217
1670
# Start communication using the Mandos protocol
2218
1671
# Get protocol number
2219
1672
line = self.request.makefile().readline()
2220
1673
logger.debug("Protocol version: %r", line)
2221
1674
try:
2222
1675
if int(line.strip().split()[0]) > 1:
2223
raise RuntimeError(line)
1676
raise RuntimeError
2224
1677
except (ValueError, IndexError, RuntimeError) as error:
2225
1678
logger.error("Unknown protocol version: %s", error)
2226
1679
return
2227
1680
2228
1681
# Start GnuTLS connection
2229
1682
try:
2230
1683
session.handshake()
2231
except gnutls.Error as error:
1684
except gnutls.errors.GNUTLSError as error:
2232
1685
logger.warning("Handshake failed: %s", error)
2233
1686
# Do not run session.bye() here: the session is not
2234
1687
# established. Just abandon the request.
2235
1688
return
2236
1689
logger.debug("Handshake succeeded")
2237
1690
2238
1691
approval_required = False
2239
1692
try:
2240
1693
try:
2241
fpr = self.fingerprint(
2242
self.peer_certificate(session))
2243
except (TypeError, gnutls.Error) as error:
1694
fpr = self.fingerprint(self.peer_certificate
1695
(session))
1696
except (TypeError,
1697
gnutls.errors.GNUTLSError) as error:
2244
1698
logger.warning("Bad certificate: %s", error)
2245
1699
return
2246
1700
logger.debug("Fingerprint: %s", fpr)
2247
1701
2248
1702
try:
2249
1703
client = ProxyClient(child_pipe, fpr,
2250
1704
self.client_address)
2251
1705
except KeyError:
2252
1706
return
2253
1707
2254
1708
if client.approval_delay:
2255
1709
delay = client.approval_delay
2256
1710
client.approvals_pending += 1
2257
1711
approval_required = True
2258
1712
2259
1713
while True:
2260
1714
if not client.enabled:
2261
1715
logger.info("Client %s is disabled",
2262
client.name)
1716
client.name)
2263
1717
if self.server.use_dbus:
2264
1718
# Emit D-Bus signal
2265
1719
client.Rejected("Disabled")
2266
1720
return
2267
1721
2268
1722
if client.approved or not client.approval_delay:
2269
# We are approved or approval is disabled
1723
#We are approved or approval is disabled
2270
1724
break
2271
1725
elif client.approved is None:
2272
1726
logger.info("Client %s needs approval",
2274
1728
if self.server.use_dbus:
2275
1729
# Emit D-Bus signal
2276
1730
client.NeedApproval(
2277
client.approval_delay.total_seconds()
2278
* 1000, client.approved_by_default)
1731
client.approval_delay_milliseconds(),
1732
client.approved_by_default)
2279
1733
else:
2280
1734
logger.warning("Client %s was not approved",
2281
1735
client.name)
2283
1737
# Emit D-Bus signal
2284
1738
client.Rejected("Denied")
2285
1739
return
2286
2287
# wait until timeout or approved
1740
1741
#wait until timeout or approved
2288
1742
time = datetime.datetime.now()
2289
1743
client.changedstate.acquire()
2290
client.changedstate.wait(delay.total_seconds())
1744
client.changedstate.wait(
1745
float(timedelta_to_milliseconds(delay)
1746
/ 1000))
2291
1747
client.changedstate.release()
2292
1748
time2 = datetime.datetime.now()
2293
1749
if (time2 - time) >= delay:
2303
1759
break
2304
1760
else:
2305
1761
delay -= time2 - time
2306
2307
try:
2308
session.send(client.secret)
2309
except gnutls.Error as error:
2310
logger.warning("gnutls send failed",
2311
exc_info=error)
2312
return
2313
1762
1763
sent_size = 0
1764
while sent_size < len(client.secret):
1765
try:
1766
sent = session.send(client.secret[sent_size:])
1767
except gnutls.errors.GNUTLSError as error:
1768
logger.warning("gnutls send failed",
1769
exc_info=error)
1770
return
1771
logger.debug("Sent: %d, remaining: %d",
1772
sent, len(client.secret)
1773
- (sent_size + sent))
1774
sent_size += sent
1775
2314
1776
logger.info("Sending secret to %s", client.name)
2315
1777
# bump the timeout using extended_timeout
2316
1778
client.bump_timeout(client.extended_timeout)
2317
1779
if self.server.use_dbus:
2318
1780
# Emit D-Bus signal
2319
1781
client.GotSecret()
2320
1782
2321
1783
finally:
2322
1784
if approval_required:
2323
1785
client.approvals_pending -= 1
2324
1786
try:
2325
1787
session.bye()
2326
except gnutls.Error as error:
1788
except gnutls.errors.GNUTLSError as error:
2327
1789
logger.warning("GnuTLS bye failed",
2328
1790
exc_info=error)
2329
1791
2330
1792
@staticmethod
2331
1793
def peer_certificate(session):
2332
1794
"Return the peer's OpenPGP certificate as a bytestring"
2333
1795
# If not an OpenPGP certificate...
2334
if (gnutls.certificate_type_get(session._c_object)
2335
!= gnutls.CRT_OPENPGP):
2336
# ...return invalid data
2337
return b""
1796
if (gnutls.library.functions
1797
.gnutls_certificate_type_get(session._c_object)
1798
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1799
# ...do the normal thing
1800
return session.peer_certificate
2338
1801
list_size = ctypes.c_uint(1)
2339
cert_list = (gnutls.certificate_get_peers
1802
cert_list = (gnutls.library.functions
1803
.gnutls_certificate_get_peers
2340
1804
(session._c_object, ctypes.byref(list_size)))
2341
1805
if not bool(cert_list) and list_size.value != 0:
2342
raise gnutls.Error("error getting peer certificate")
1806
raise gnutls.errors.GNUTLSError("error getting peer"
1807
" certificate")
2343
1808
if list_size.value == 0:
2344
1809
return None
2345
1810
cert = cert_list[0]
2346
1811
return ctypes.string_at(cert.data, cert.size)
2347
1812
2348
1813
@staticmethod
2349
1814
def fingerprint(openpgp):
2350
1815
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
2351
1816
# New GnuTLS "datum" with the OpenPGP public key
2352
datum = gnutls.datum_t(
2353
ctypes.cast(ctypes.c_char_p(openpgp),
2354
ctypes.POINTER(ctypes.c_ubyte)),
2355
ctypes.c_uint(len(openpgp)))
1817
datum = (gnutls.library.types
1818
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1819
ctypes.POINTER
1820
(ctypes.c_ubyte)),
1821
ctypes.c_uint(len(openpgp))))
2356
1822
# New empty GnuTLS certificate
2357
crt = gnutls.openpgp_crt_t()
2358
gnutls.openpgp_crt_init(ctypes.byref(crt))
1823
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1824
(gnutls.library.functions
1825
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
2359
1826
# Import the OpenPGP public key into the certificate
2360
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2361
gnutls.OPENPGP_FMT_RAW)
1827
(gnutls.library.functions
1828
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1829
gnutls.library.constants
1830
.GNUTLS_OPENPGP_FMT_RAW))
2362
1831
# Verify the self signature in the key
2363
1832
crtverify = ctypes.c_uint()
2364
gnutls.openpgp_crt_verify_self(crt, 0,
2365
ctypes.byref(crtverify))
1833
(gnutls.library.functions
1834
.gnutls_openpgp_crt_verify_self(crt, 0,
1835
ctypes.byref(crtverify)))
2366
1836
if crtverify.value != 0:
2367
gnutls.openpgp_crt_deinit(crt)
2368
raise gnutls.CertificateSecurityError(code
2369
=crtverify.value)
1837
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1838
raise (gnutls.errors.CertificateSecurityError
1839
("Verify failed"))
2370
1840
# New buffer for the fingerprint
2371
1841
buf = ctypes.create_string_buffer(20)
2372
1842
buf_len = ctypes.c_size_t()
2373
1843
# Get the fingerprint from the certificate into the buffer
2374
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2375
ctypes.byref(buf_len))
1844
(gnutls.library.functions
1845
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1846
ctypes.byref(buf_len)))
2376
1847
# Deinit the certificate
2377
gnutls.openpgp_crt_deinit(crt)
1848
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2378
1849
# Convert the buffer to a Python bytestring
2379
1850
fpr = ctypes.string_at(buf, buf_len.value)
2380
1851
# Convert the bytestring to hexadecimal notation
2384
1855
2385
1856
class MultiprocessingMixIn(object):
2386
1857
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2387
2388
1858
def sub_process_main(self, request, address):
2389
1859
try:
2390
1860
self.finish_request(request, address)
2391
1861
except Exception:
2392
1862
self.handle_error(request, address)
2393
1863
self.close_request(request)
2394
1864
2395
1865
def process_request(self, request, address):
2396
1866
"""Start a new process to process the request."""
2397
proc = multiprocessing.Process(target=self.sub_process_main,
2398
args=(request, address))
1867
proc = multiprocessing.Process(target = self.sub_process_main,
1868
args = (request, address))
2399
1869
proc.start()
2400
1870
return proc
2401
1871
2402
1872
2403
1873
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
2404
1874
""" adds a pipe to the MixIn """
2405
2406
1875
def process_request(self, request, client_address):
2407
1876
"""Overrides and wraps the original process_request().
2408
1877
2409
1878
This function creates a new pipe in self.pipe
2410
1879
"""
2411
1880
parent_pipe, self.child_pipe = multiprocessing.Pipe()
2412
1881
2413
1882
proc = MultiprocessingMixIn.process_request(self, request,
2414
1883
client_address)
2415
1884
self.child_pipe.close()
2416
1885
self.add_pipe(parent_pipe, proc)
2417
1886
2418
1887
def add_pipe(self, parent_pipe, proc):
2419
1888
"""Dummy function; override as necessary"""
2420
raise NotImplementedError()
1889
raise NotImplementedError
2421
1890
2422
1891
2423
1892
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
2424
1893
socketserver.TCPServer, object):
2425
1894
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
2426
1895
2427
1896
Attributes:
2428
1897
enabled: Boolean; whether this server is activated yet
2429
1898
interface: None or a network interface name (string)
2430
1899
use_ipv6: Boolean; to use IPv6 or not
2431
1900
"""
2432
2433
1901
def __init__(self, server_address, RequestHandlerClass,
2434
interface=None,
2435
use_ipv6=True,
2436
socketfd=None):
2437
"""If socketfd is set, use that file descriptor instead of
2438
creating a new one with socket.socket().
2439
"""
1902
interface=None, use_ipv6=True):
2440
1903
self.interface = interface
2441
1904
if use_ipv6:
2442
1905
self.address_family = socket.AF_INET6
2443
if socketfd is not None:
2444
# Save the file descriptor
2445
self.socketfd = socketfd
2446
# Save the original socket.socket() function
2447
self.socket_socket = socket.socket
2448
2449
# To implement --socket, we monkey patch socket.socket.
2450
#
2451
# (When socketserver.TCPServer is a new-style class, we
2452
# could make self.socket into a property instead of monkey
2453
# patching socket.socket.)
2454
#
2455
# Create a one-time-only replacement for socket.socket()
2456
@functools.wraps(socket.socket)
2457
def socket_wrapper(*args, **kwargs):
2458
# Restore original function so subsequent calls are
2459
# not affected.
2460
socket.socket = self.socket_socket
2461
del self.socket_socket
2462
# This time only, return a new socket object from the
2463
# saved file descriptor.
2464
return socket.fromfd(self.socketfd, *args, **kwargs)
2465
# Replace socket.socket() function with wrapper
2466
socket.socket = socket_wrapper
2467
# The socketserver.TCPServer.__init__ will call
2468
# socket.socket(), which might be our replacement,
2469
# socket_wrapper(), if socketfd was set.
2470
1906
socketserver.TCPServer.__init__(self, server_address,
2471
1907
RequestHandlerClass)
2472
2473
1908
def server_bind(self):
2474
1909
"""This overrides the normal server_bind() function
2475
1910
to bind to an interface if one was specified, and also NOT to
2476
1911
bind to an address or port if they were not specified."""
2477
global SO_BINDTODEVICE
2478
1912
if self.interface is not None:
2479
1913
if SO_BINDTODEVICE is None:
2480
# Fall back to a hard-coded value which seems to be
2481
# common enough.
2482
logger.warning("SO_BINDTODEVICE not found, trying 25")
2483
SO_BINDTODEVICE = 25
2484
try:
2485
self.socket.setsockopt(
2486
socket.SOL_SOCKET, SO_BINDTODEVICE,
2487
(self.interface + "\0").encode("utf-8"))
2488
except socket.error as error:
2489
if error.errno == errno.EPERM:
2490
logger.error("No permission to bind to"
2491
" interface %s", self.interface)
2492
elif error.errno == errno.ENOPROTOOPT:
2493
logger.error("SO_BINDTODEVICE not available;"
2494
" cannot bind to interface %s",
2495
self.interface)
2496
elif error.errno == errno.ENODEV:
2497
logger.error("Interface %s does not exist,"
2498
" cannot bind", self.interface)
2499
else:
2500
raise
1914
logger.error("SO_BINDTODEVICE does not exist;"
1915
" cannot bind to interface %s",
1916
self.interface)
1917
else:
1918
try:
1919
self.socket.setsockopt(socket.SOL_SOCKET,
1920
SO_BINDTODEVICE,
1921
str(self.interface
1922
+ '\0'))
1923
except socket.error as error:
1924
if error.errno == errno.EPERM:
1925
logger.error("No permission to"
1926
" bind to interface %s",
1927
self.interface)
1928
elif error.errno == errno.ENOPROTOOPT:
1929
logger.error("SO_BINDTODEVICE not available;"
1930
" cannot bind to interface %s",
1931
self.interface)
1932
elif error.errno == errno.ENODEV:
1933
logger.error("Interface %s does not"
1934
" exist, cannot bind",
1935
self.interface)
1936
else:
1937
raise
2501
1938
# Only bind(2) the socket if we really need to.
2502
1939
if self.server_address[0] or self.server_address[1]:
2503
1940
if not self.server_address[0]:
2504
1941
if self.address_family == socket.AF_INET6:
2505
any_address = "::" # in6addr_any
1942
any_address = "::" # in6addr_any
2506
1943
else:
2507
any_address = "0.0.0.0" # INADDR_ANY
1944
any_address = socket.INADDR_ANY
2508
1945
self.server_address = (any_address,
2509
1946
self.server_address[1])
2510
1947
elif not self.server_address[1]:
2511
self.server_address = (self.server_address[0], 0)
1948
self.server_address = (self.server_address[0],
1949
0)
2512
1950
# if self.interface:
2513
1951
# self.server_address = (self.server_address[0],
2514
1952
# 0, # port
2520
1958
2521
1959
class MandosServer(IPv6_TCPServer):
2522
1960
"""Mandos server.
2523
1961
2524
1962
Attributes:
2525
1963
clients: set of Client objects
2526
1964
gnutls_priority GnuTLS priority string
2527
1965
use_dbus: Boolean; to emit D-Bus signals or not
2528
2529
Assumes a GLib.MainLoop event loop.
1966
1967
Assumes a gobject.MainLoop event loop.
2530
1968
"""
2531
2532
1969
def __init__(self, server_address, RequestHandlerClass,
2533
interface=None,
2534
use_ipv6=True,
2535
clients=None,
2536
gnutls_priority=None,
2537
use_dbus=True,
2538
socketfd=None):
1970
interface=None, use_ipv6=True, clients=None,
1971
gnutls_priority=None, use_dbus=True):
2539
1972
self.enabled = False
2540
1973
self.clients = clients
2541
1974
if self.clients is None:
2544
1977
self.gnutls_priority = gnutls_priority
2545
1978
IPv6_TCPServer.__init__(self, server_address,
2546
1979
RequestHandlerClass,
2547
interface=interface,
2548
use_ipv6=use_ipv6,
2549
socketfd=socketfd)
2550
1980
interface = interface,
1981
use_ipv6 = use_ipv6)
2551
1982
def server_activate(self):
2552
1983
if self.enabled:
2553
1984
return socketserver.TCPServer.server_activate(self)
2554
1985
2555
1986
def enable(self):
2556
1987
self.enabled = True
2557
1988
2558
1989
def add_pipe(self, parent_pipe, proc):
2559
1990
# Call "handle_ipc" for both data and EOF events
2560
GLib.io_add_watch(
2561
parent_pipe.fileno(),
2562
GLib.IO_IN | GLib.IO_HUP,
2563
functools.partial(self.handle_ipc,
2564
parent_pipe=parent_pipe,
2565
proc=proc))
2566
2567
def handle_ipc(self, source, condition,
2568
parent_pipe=None,
2569
proc=None,
2570
client_object=None):
1991
gobject.io_add_watch(parent_pipe.fileno(),
1992
gobject.IO_IN | gobject.IO_HUP,
1993
functools.partial(self.handle_ipc,
1994
parent_pipe =
1995
parent_pipe,
1996
proc = proc))
1997
1998
def handle_ipc(self, source, condition, parent_pipe=None,
1999
proc = None, client_object=None):
2571
2000
# error, or the other end of multiprocessing.Pipe has closed
2572
if condition & (GLib.IO_ERR | GLib.IO_HUP):
2001
if condition & (gobject.IO_ERR | gobject.IO_HUP):
2573
2002
# Wait for other process to exit
2574
2003
proc.join()
2575
2004
return False
2576
2005
2577
2006
# Read a request from the child
2578
2007
request = parent_pipe.recv()
2579
2008
command = request[0]
2580
2009
2581
2010
if command == 'init':
2582
fpr = request[1].decode("ascii")
2011
fpr = request[1]
2583
2012
address = request[2]
2584
2585
for c in self.clients.values():
2013
2014
for c in self.clients.itervalues():
2586
2015
if c.fingerprint == fpr:
2587
2016
client = c
2588
2017
break
2595
2024
address[0])
2596
2025
parent_pipe.send(False)
2597
2026
return False
2598
2599
GLib.io_add_watch(
2600
parent_pipe.fileno(),
2601
GLib.IO_IN | GLib.IO_HUP,
2602
functools.partial(self.handle_ipc,
2603
parent_pipe=parent_pipe,
2604
proc=proc,
2605
client_object=client))
2027
2028
gobject.io_add_watch(parent_pipe.fileno(),
2029
gobject.IO_IN | gobject.IO_HUP,
2030
functools.partial(self.handle_ipc,
2031
parent_pipe =
2032
parent_pipe,
2033
proc = proc,
2034
client_object =
2035
client))
2606
2036
parent_pipe.send(True)
2607
2037
# remove the old hook in favor of the new above hook on
2608
2038
# same fileno
2611
2041
funcname = request[1]
2612
2042
args = request[2]
2613
2043
kwargs = request[3]
2614
2044
2615
2045
parent_pipe.send(('data', getattr(client_object,
2616
2046
funcname)(*args,
2617
**kwargs)))
2618
2047
**kwargs)))
2048
2619
2049
if command == 'getattr':
2620
2050
attrname = request[1]
2621
if isinstance(client_object.__getattribute__(attrname),
2622
collections.Callable):
2623
parent_pipe.send(('function', ))
2051
if callable(client_object.__getattribute__(attrname)):
2052
parent_pipe.send(('function',))
2624
2053
else:
2625
parent_pipe.send((
2626
'data', client_object.__getattribute__(attrname)))
2627
2054
parent_pipe.send(('data', client_object
2055
.__getattribute__(attrname)))
2056
2628
2057
if command == 'setattr':
2629
2058
attrname = request[1]
2630
2059
value = request[2]
2631
2060
setattr(client_object, attrname, value)
2632
2061
2633
2062
return True
2634
2063
2635
2064
2636
def rfc3339_duration_to_delta(duration):
2637
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2638
2639
>>> rfc3339_duration_to_delta("P7D")
2640
datetime.timedelta(7)
2641
>>> rfc3339_duration_to_delta("PT60S")
2642
datetime.timedelta(0, 60)
2643
>>> rfc3339_duration_to_delta("PT60M")
2644
datetime.timedelta(0, 3600)
2645
>>> rfc3339_duration_to_delta("PT24H")
2646
datetime.timedelta(1)
2647
>>> rfc3339_duration_to_delta("P1W")
2648
datetime.timedelta(7)
2649
>>> rfc3339_duration_to_delta("PT5M30S")
2650
datetime.timedelta(0, 330)
2651
>>> rfc3339_duration_to_delta("P1DT3M20S")
2652
datetime.timedelta(1, 200)
2653
"""
2654
2655
# Parsing an RFC 3339 duration with regular expressions is not
2656
# possible - there would have to be multiple places for the same
2657
# values, like seconds. The current code, while more esoteric, is
2658
# cleaner without depending on a parsing library. If Python had a
2659
# built-in library for parsing we would use it, but we'd like to
2660
# avoid excessive use of external libraries.
2661
2662
# New type for defining tokens, syntax, and semantics all-in-one
2663
Token = collections.namedtuple("Token", (
2664
"regexp", # To match token; if "value" is not None, must have
2665
# a "group" containing digits
2666
"value", # datetime.timedelta or None
2667
"followers")) # Tokens valid after this token
2668
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2669
# the "duration" ABNF definition in RFC 3339, Appendix A.
2670
token_end = Token(re.compile(r"$"), None, frozenset())
2671
token_second = Token(re.compile(r"(\d+)S"),
2672
datetime.timedelta(seconds=1),
2673
frozenset((token_end, )))
2674
token_minute = Token(re.compile(r"(\d+)M"),
2675
datetime.timedelta(minutes=1),
2676
frozenset((token_second, token_end)))
2677
token_hour = Token(re.compile(r"(\d+)H"),
2678
datetime.timedelta(hours=1),
2679
frozenset((token_minute, token_end)))
2680
token_time = Token(re.compile(r"T"),
2681
None,
2682
frozenset((token_hour, token_minute,
2683
token_second)))
2684
token_day = Token(re.compile(r"(\d+)D"),
2685
datetime.timedelta(days=1),
2686
frozenset((token_time, token_end)))
2687
token_month = Token(re.compile(r"(\d+)M"),
2688
datetime.timedelta(weeks=4),
2689
frozenset((token_day, token_end)))
2690
token_year = Token(re.compile(r"(\d+)Y"),
2691
datetime.timedelta(weeks=52),
2692
frozenset((token_month, token_end)))
2693
token_week = Token(re.compile(r"(\d+)W"),
2694
datetime.timedelta(weeks=1),
2695
frozenset((token_end, )))
2696
token_duration = Token(re.compile(r"P"), None,
2697
frozenset((token_year, token_month,
2698
token_day, token_time,
2699
token_week)))
2700
# Define starting values:
2701
# Value so far
2702
value = datetime.timedelta()
2703
found_token = None
2704
# Following valid tokens
2705
followers = frozenset((token_duration, ))
2706
# String left to parse
2707
s = duration
2708
# Loop until end token is found
2709
while found_token is not token_end:
2710
# Search for any currently valid tokens
2711
for token in followers:
2712
match = token.regexp.match(s)
2713
if match is not None:
2714
# Token found
2715
if token.value is not None:
2716
# Value found, parse digits
2717
factor = int(match.group(1), 10)
2718
# Add to value so far
2719
value += factor * token.value
2720
# Strip token from string
2721
s = token.regexp.sub("", s, 1)
2722
# Go to found token
2723
found_token = token
2724
# Set valid next tokens
2725
followers = found_token.followers
2726
break
2727
else:
2728
# No currently valid tokens were found
2729
raise ValueError("Invalid RFC 3339 duration: {!r}"
2730
.format(duration))
2731
# End token found
2732
return value
2733
2734
2735
2065
def string_to_delta(interval):
2736
2066
"""Parse a string and return a datetime.timedelta
2737
2067
2738
2068
>>> string_to_delta('7d')
2739
2069
datetime.timedelta(7)
2740
2070
>>> string_to_delta('60s')
2748
2078
>>> string_to_delta('5m 30s')
2749
2079
datetime.timedelta(0, 330)
2750
2080
"""
2751
2752
try:
2753
return rfc3339_duration_to_delta(interval)
2754
except ValueError:
2755
pass
2756
2757
2081
timevalue = datetime.timedelta(0)
2758
2082
for s in interval.split():
2759
2083
try:
2760
suffix = s[-1]
2084
suffix = unicode(s[-1])
2761
2085
value = int(s[:-1])
2762
2086
if suffix == "d":
2763
2087
delta = datetime.timedelta(value)
2770
2094
elif suffix == "w":
2771
2095
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
2772
2096
else:
2773
raise ValueError("Unknown suffix {!r}".format(suffix))
2774
except IndexError as e:
2097
raise ValueError("Unknown suffix {0!r}"
2098
.format(suffix))
2099
except (ValueError, IndexError) as e:
2775
2100
raise ValueError(*(e.args))
2776
2101
timevalue += delta
2777
2102
return timevalue
2778
2103
2779
2104
2780
def daemon(nochdir=False, noclose=False):
2105
def daemon(nochdir = False, noclose = False):
2781
2106
"""See daemon(3). Standard BSD Unix function.
2782
2107
2783
2108
This should really exist as os.daemon, but it doesn't (yet)."""
2784
2109
if os.fork():
2785
2110
sys.exit()
2793
2118
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2794
2119
if not stat.S_ISCHR(os.fstat(null).st_mode):
2795
2120
raise OSError(errno.ENODEV,
2796
"{} not a character device"
2121
"{0} not a character device"
2797
2122
.format(os.devnull))
2798
2123
os.dup2(null, sys.stdin.fileno())
2799
2124
os.dup2(null, sys.stdout.fileno())
2803
2128
2804
2129
2805
2130
def main():
2806
2131
2807
2132
##################################################################
2808
2133
# Parsing of options, both command line and config file
2809
2134
2810
2135
parser = argparse.ArgumentParser()
2811
2136
parser.add_argument("-v", "--version", action="version",
2812
version="%(prog)s {}".format(version),
2137
version = "%(prog)s {0}".format(version),
2813
2138
help="show version number and exit")
2814
2139
parser.add_argument("-i", "--interface", metavar="IF",
2815
2140
help="Bind to interface IF")
2821
2146
help="Run self-test")
2822
2147
parser.add_argument("--debug", action="store_true",
2823
2148
help="Debug mode; run in foreground and log"
2824
" to terminal", default=None)
2149
" to terminal")
2825
2150
parser.add_argument("--debuglevel", metavar="LEVEL",
2826
2151
help="Debug level for stdout output")
2827
2152
parser.add_argument("--priority", help="GnuTLS"
2834
2159
" files")
2835
2160
parser.add_argument("--no-dbus", action="store_false",
2836
2161
dest="use_dbus", help="Do not provide D-Bus"
2837
" system bus interface", default=None)
2162
" system bus interface")
2838
2163
parser.add_argument("--no-ipv6", action="store_false",
2839
dest="use_ipv6", help="Do not use IPv6",
2840
default=None)
2164
dest="use_ipv6", help="Do not use IPv6")
2841
2165
parser.add_argument("--no-restore", action="store_false",
2842
2166
dest="restore", help="Do not restore stored"
2843
" state", default=None)
2844
parser.add_argument("--socket", type=int,
2845
help="Specify a file descriptor to a network"
2846
" socket to use instead of creating one")
2167
" state")
2847
2168
parser.add_argument("--statedir", metavar="DIR",
2848
2169
help="Directory to save/restore state in")
2849
parser.add_argument("--foreground", action="store_true",
2850
help="Run in foreground", default=None)
2851
parser.add_argument("--no-zeroconf", action="store_false",
2852
dest="zeroconf", help="Do not use Zeroconf",
2853
default=None)
2854
2170
2855
2171
options = parser.parse_args()
2856
2172
2857
2173
if options.check:
2858
2174
import doctest
2859
fail_count, test_count = doctest.testmod()
2860
sys.exit(os.EX_OK if fail_count == 0 else 1)
2861
2175
doctest.testmod()
2176
sys.exit()
2177
2862
2178
# Default values for config file for server-global settings
2863
server_defaults = {"interface": "",
2864
"address": "",
2865
"port": "",
2866
"debug": "False",
2867
"priority":
2868
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2869
":+SIGN-DSA-SHA256",
2870
"servicename": "Mandos",
2871
"use_dbus": "True",
2872
"use_ipv6": "True",
2873
"debuglevel": "",
2874
"restore": "True",
2875
"socket": "",
2876
"statedir": "/var/lib/mandos",
2877
"foreground": "False",
2878
"zeroconf": "True",
2879
}
2880
2179
server_defaults = { "interface": "",
2180
"address": "",
2181
"port": "",
2182
"debug": "False",
2183
"priority":
2184
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2185
"servicename": "Mandos",
2186
"use_dbus": "True",
2187
"use_ipv6": "True",
2188
"debuglevel": "",
2189
"restore": "True",
2190
"statedir": "/var/lib/mandos"
2191
}
2192
2881
2193
# Parse config file for server-global settings
2882
2194
server_config = configparser.SafeConfigParser(server_defaults)
2883
2195
del server_defaults
2884
server_config.read(os.path.join(options.configdir, "mandos.conf"))
2196
server_config.read(os.path.join(options.configdir,
2197
"mandos.conf"))
2885
2198
# Convert the SafeConfigParser object to a dict
2886
2199
server_settings = server_config.defaults()
2887
2200
# Use the appropriate methods on the non-string config options
2888
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2889
"foreground", "zeroconf"):
2201
for option in ("debug", "use_dbus", "use_ipv6"):
2890
2202
server_settings[option] = server_config.getboolean("DEFAULT",
2891
2203
option)
2892
2204
if server_settings["port"]:
2893
2205
server_settings["port"] = server_config.getint("DEFAULT",
2894
2206
"port")
2895
if server_settings["socket"]:
2896
server_settings["socket"] = server_config.getint("DEFAULT",
2897
"socket")
2898
# Later, stdin will, and stdout and stderr might, be dup'ed
2899
# over with an opened os.devnull. But we don't want this to
2900
# happen with a supplied network socket.
2901
if 0 <= server_settings["socket"] <= 2:
2902
server_settings["socket"] = os.dup(server_settings
2903
["socket"])
2904
2207
del server_config
2905
2208
2906
2209
# Override the settings from the config file with command line
2907
2210
# options, if set.
2908
2211
for option in ("interface", "address", "port", "debug",
2909
"priority", "servicename", "configdir", "use_dbus",
2910
"use_ipv6", "debuglevel", "restore", "statedir",
2911
"socket", "foreground", "zeroconf"):
2212
"priority", "servicename", "configdir",
2213
"use_dbus", "use_ipv6", "debuglevel", "restore",
2214
"statedir"):
2912
2215
value = getattr(options, option)
2913
2216
if value is not None:
2914
2217
server_settings[option] = value
2915
2218
del options
2916
2219
# Force all strings to be unicode
2917
2220
for option in server_settings.keys():
2918
if isinstance(server_settings[option], bytes):
2919
server_settings[option] = (server_settings[option]
2920
.decode("utf-8"))
2921
# Force all boolean options to be boolean
2922
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2923
"foreground", "zeroconf"):
2924
server_settings[option] = bool(server_settings[option])
2925
# Debug implies foreground
2926
if server_settings["debug"]:
2927
server_settings["foreground"] = True
2221
if type(server_settings[option]) is str:
2222
server_settings[option] = unicode(server_settings[option])
2928
2223
# Now we have our good server settings in "server_settings"
2929
2224
2930
2225
##################################################################
2931
2932
if (not server_settings["zeroconf"]
2933
and not (server_settings["port"]
2934
or server_settings["socket"] != "")):
2935
parser.error("Needs port or socket to work without Zeroconf")
2936
2226
2937
2227
# For convenience
2938
2228
debug = server_settings["debug"]
2939
2229
debuglevel = server_settings["debuglevel"]
2941
2231
use_ipv6 = server_settings["use_ipv6"]
2942
2232
stored_state_path = os.path.join(server_settings["statedir"],
2943
2233
stored_state_file)
2944
foreground = server_settings["foreground"]
2945
zeroconf = server_settings["zeroconf"]
2946
2234
2947
2235
if debug:
2948
2236
initlogger(debug, logging.DEBUG)
2949
2237
else:
2952
2240
else:
2953
2241
level = getattr(logging, debuglevel.upper())
2954
2242
initlogger(debug, level)
2955
2243
2956
2244
if server_settings["servicename"] != "Mandos":
2957
syslogger.setFormatter(
2958
logging.Formatter('Mandos ({}) [%(process)d]:'
2959
' %(levelname)s: %(message)s'.format(
2960
server_settings["servicename"])))
2961
2245
syslogger.setFormatter(logging.Formatter
2246
('Mandos ({0}) [%(process)d]:'
2247
' %(levelname)s: %(message)s'
2248
.format(server_settings
2249
["servicename"])))
2250
2962
2251
# Parse config file with clients
2963
2252
client_config = configparser.SafeConfigParser(Client
2964
2253
.client_defaults)
2965
2254
client_config.read(os.path.join(server_settings["configdir"],
2966
2255
"clients.conf"))
2967
2256
2968
2257
global mandos_dbus_service
2969
2258
mandos_dbus_service = None
2970
2971
socketfd = None
2972
if server_settings["socket"] != "":
2973
socketfd = server_settings["socket"]
2974
tcp_server = MandosServer(
2975
(server_settings["address"], server_settings["port"]),
2976
ClientHandler,
2977
interface=(server_settings["interface"] or None),
2978
use_ipv6=use_ipv6,
2979
gnutls_priority=server_settings["priority"],
2980
use_dbus=use_dbus,
2981
socketfd=socketfd)
2982
if not foreground:
2983
pidfilename = "/run/mandos.pid"
2984
if not os.path.isdir("/run/."):
2985
pidfilename = "/var/run/mandos.pid"
2986
pidfile = None
2259
2260
tcp_server = MandosServer((server_settings["address"],
2261
server_settings["port"]),
2262
ClientHandler,
2263
interface=(server_settings["interface"]
2264
or None),
2265
use_ipv6=use_ipv6,
2266
gnutls_priority=
2267
server_settings["priority"],
2268
use_dbus=use_dbus)
2269
if not debug:
2270
pidfilename = "/var/run/mandos.pid"
2987
2271
try:
2988
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
2272
pidfile = open(pidfilename, "w")
2989
2273
except IOError as e:
2990
2274
logger.error("Could not open file %r", pidfilename,
2991
2275
exc_info=e)
2992
2993
for name, group in (("_mandos", "_mandos"),
2994
("mandos", "mandos"),
2995
("nobody", "nogroup")):
2276
2277
for name in ("_mandos", "mandos", "nobody"):
2996
2278
try:
2997
2279
uid = pwd.getpwnam(name).pw_uid
2998
gid = pwd.getpwnam(group).pw_gid
2280
gid = pwd.getpwnam(name).pw_gid
2999
2281
break
3000
2282
except KeyError:
3001
2283
continue
3005
2287
try:
3006
2288
os.setgid(gid)
3007
2289
os.setuid(uid)
3008
if debug:
3009
logger.debug("Did setuid/setgid to {}:{}".format(uid,
3010
gid))
3011
2290
except OSError as error:
3012
logger.warning("Failed to setuid/setgid to {}:{}: {}"
3013
.format(uid, gid, os.strerror(error.errno)))
3014
2291
if error.errno != errno.EPERM:
3015
raise
3016
2292
raise error
2293
3017
2294
if debug:
3018
2295
# Enable all possible GnuTLS debugging
3019
2296
3020
2297
# "Use a log level over 10 to enable all debugging options."
3021
2298
# - GnuTLS manual
3022
gnutls.global_set_log_level(11)
3023
3024
@gnutls.log_func
2299
gnutls.library.functions.gnutls_global_set_log_level(11)
2300
2301
@gnutls.library.types.gnutls_log_func
3025
2302
def debug_gnutls(level, string):
3026
2303
logger.debug("GnuTLS: %s", string[:-1])
3027
3028
gnutls.global_set_log_function(debug_gnutls)
3029
2304
2305
(gnutls.library.functions
2306
.gnutls_global_set_log_function(debug_gnutls))
2307
3030
2308
# Redirect stdin so all checkers get /dev/null
3031
2309
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
3032
2310
os.dup2(null, sys.stdin.fileno())
3033
2311
if null > 2:
3034
2312
os.close(null)
3035
2313
3036
2314
# Need to fork before connecting to D-Bus
3037
if not foreground:
2315
if not debug:
3038
2316
# Close all input and output, do double fork, etc.
3039
2317
daemon()
3040
3041
# multiprocessing will use threads, so before we use GLib we need
3042
# to inform GLib that threads will be used.
3043
GLib.threads_init()
3044
2318
2319
gobject.threads_init()
2320
3045
2321
global main_loop
3046
2322
# From the Avahi example code
3047
2323
DBusGMainLoop(set_as_default=True)
3048
main_loop = GLib.MainLoop()
2324
main_loop = gobject.MainLoop()
3049
2325
bus = dbus.SystemBus()
3050
2326
# End of Avahi example code
3051
2327
if use_dbus:
3052
2328
try:
3053
2329
bus_name = dbus.service.BusName("se.recompile.Mandos",
3054
bus,
3055
do_not_queue=True)
3056
old_bus_name = dbus.service.BusName(
3057
"se.bsnet.fukt.Mandos", bus,
3058
do_not_queue=True)
3059
except dbus.exceptions.DBusException as e:
2330
bus, do_not_queue=True)
2331
old_bus_name = (dbus.service.BusName
2332
("se.bsnet.fukt.Mandos", bus,
2333
do_not_queue=True))
2334
except dbus.exceptions.NameExistsException as e:
3060
2335
logger.error("Disabling D-Bus:", exc_info=e)
3061
2336
use_dbus = False
3062
2337
server_settings["use_dbus"] = False
3063
2338
tcp_server.use_dbus = False
3064
if zeroconf:
3065
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3066
service = AvahiServiceToSyslog(
3067
name=server_settings["servicename"],
3068
servicetype="_mandos._tcp",
3069
protocol=protocol,
3070
bus=bus)
3071
if server_settings["interface"]:
3072
service.interface = if_nametoindex(
3073
server_settings["interface"].encode("utf-8"))
3074
2339
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2340
service = AvahiServiceToSyslog(name =
2341
server_settings["servicename"],
2342
servicetype = "_mandos._tcp",
2343
protocol = protocol, bus = bus)
2344
if server_settings["interface"]:
2345
service.interface = (if_nametoindex
2346
(str(server_settings["interface"])))
2347
3075
2348
global multiprocessing_manager
3076
2349
multiprocessing_manager = multiprocessing.Manager()
3077
2350
3078
2351
client_class = Client
3079
2352
if use_dbus:
3080
client_class = functools.partial(ClientDBus, bus=bus)
3081
2353
client_class = functools.partial(ClientDBus, bus = bus)
2354
3082
2355
client_settings = Client.config_parser(client_config)
3083
2356
old_client_settings = {}
3084
2357
clients_data = {}
3085
3086
# This is used to redirect stdout and stderr for checker processes
3087
global wnull
3088
wnull = open(os.devnull, "w") # A writable /dev/null
3089
# Only used if server is running in foreground but not in debug
3090
# mode
3091
if debug or not foreground:
3092
wnull.close()
3093
2358
3094
2359
# Get client data and settings from last running state.
3095
2360
if server_settings["restore"]:
3096
2361
try:
3097
2362
with open(stored_state_path, "rb") as stored_state:
3098
if sys.version_info.major == 2:
3099
clients_data, old_client_settings = pickle.load(
3100
stored_state)
3101
else:
3102
bytes_clients_data, bytes_old_client_settings = (
3103
pickle.load(stored_state, encoding="bytes"))
3104
# Fix bytes to strings
3105
# clients_data
3106
# .keys()
3107
clients_data = {(key.decode("utf-8")
3108
if isinstance(key, bytes)
3109
else key): value
3110
for key, value in
3111
bytes_clients_data.items()}
3112
del bytes_clients_data
3113
for key in clients_data:
3114
value = {(k.decode("utf-8")
3115
if isinstance(k, bytes) else k): v
3116
for k, v in
3117
clients_data[key].items()}
3118
clients_data[key] = value
3119
# .client_structure
3120
value["client_structure"] = [
3121
(s.decode("utf-8")
3122
if isinstance(s, bytes)
3123
else s) for s in
3124
value["client_structure"]]
3125
# .name & .host
3126
for k in ("name", "host"):
3127
if isinstance(value[k], bytes):
3128
value[k] = value[k].decode("utf-8")
3129
# old_client_settings
3130
# .keys()
3131
old_client_settings = {
3132
(key.decode("utf-8")
3133
if isinstance(key, bytes)
3134
else key): value
3135
for key, value in
3136
bytes_old_client_settings.items()}
3137
del bytes_old_client_settings
3138
# .host
3139
for value in old_client_settings.values():
3140
if isinstance(value["host"], bytes):
3141
value["host"] = (value["host"]
3142
.decode("utf-8"))
2363
clients_data, old_client_settings = (pickle.load
2364
(stored_state))
3143
2365
os.remove(stored_state_path)
3144
2366
except IOError as e:
3145
2367
if e.errno == errno.ENOENT:
3146
logger.warning("Could not load persistent state:"
3147
" {}".format(os.strerror(e.errno)))
2368
logger.warning("Could not load persistent state: {0}"
2369
.format(os.strerror(e.errno)))
3148
2370
else:
3149
2371
logger.critical("Could not load persistent state:",
3150
2372
exc_info=e)
3151
2373
raise
3152
2374
except EOFError as e:
3153
2375
logger.warning("Could not load persistent state: "
3154
"EOFError:",
3155
exc_info=e)
3156
2376
"EOFError:", exc_info=e)
2377
3157
2378
with PGPEngine() as pgp:
3158
for client_name, client in clients_data.items():
3159
# Skip removed clients
3160
if client_name not in client_settings:
3161
continue
3162
2379
for client_name, client in clients_data.iteritems():
3163
2380
# Decide which value to use after restoring saved state.
3164
2381
# We have three different values: Old config file,
3165
2382
# new config file, and saved state.
3170
2387
# For each value in new config, check if it
3171
2388
# differs from the old config value (Except for
3172
2389
# the "secret" attribute)
3173
if (name != "secret"
3174
and (value !=
3175
old_client_settings[client_name][name])):
2390
if (name != "secret" and
2391
value != old_client_settings[client_name]
2392
[name]):
3176
2393
client[name] = value
3177
2394
except KeyError:
3178
2395
pass
3179
2396
3180
2397
# Clients who has passed its expire date can still be
3181
# enabled if its last checker was successful. A Client
2398
# enabled if its last checker was successful. Clients
3182
2399
# whose checker succeeded before we stored its state is
3183
2400
# assumed to have successfully run all checkers during
3184
2401
# downtime.
3186
2403
if datetime.datetime.utcnow() >= client["expires"]:
3187
2404
if not client["last_checked_ok"]:
3188
2405
logger.warning(
3189
"disabling client {} - Client never "
3190
"performed a successful checker".format(
3191
client_name))
2406
"disabling client {0} - Client never "
2407
"performed a successful checker"
2408
.format(client_name))
3192
2409
client["enabled"] = False
3193
2410
elif client["last_checker_status"] != 0:
3194
2411
logger.warning(
3195
"disabling client {} - Client last"
3196
" checker failed with error code"
3197
" {}".format(
3198
client_name,
3199
client["last_checker_status"]))
2412
"disabling client {0} - Client "
2413
"last checker failed with error code {1}"
2414
.format(client_name,
2415
client["last_checker_status"]))
3200
2416
client["enabled"] = False
3201
2417
else:
3202
client["expires"] = (
3203
datetime.datetime.utcnow()
3204
+ client["timeout"])
2418
client["expires"] = (datetime.datetime
2419
.utcnow()
2420
+ client["timeout"])
3205
2421
logger.debug("Last checker succeeded,"
3206
" keeping {} enabled".format(
3207
client_name))
2422
" keeping {0} enabled"
2423
.format(client_name))
3208
2424
try:
3209
client["secret"] = pgp.decrypt(
3210
client["encrypted_secret"],
3211
client_settings[client_name]["secret"])
2425
client["secret"] = (
2426
pgp.decrypt(client["encrypted_secret"],
2427
client_settings[client_name]
2428
["secret"]))
3212
2429
except PGPError:
3213
2430
# If decryption fails, we use secret from new settings
3214
logger.debug("Failed to decrypt {} old secret".format(
3215
client_name))
3216
client["secret"] = (client_settings[client_name]
3217
["secret"])
3218
2431
logger.debug("Failed to decrypt {0} old secret"
2432
.format(client_name))
2433
client["secret"] = (
2434
client_settings[client_name]["secret"])
2435
3219
2436
# Add/remove clients based on new changes made to config
3220
2437
for client_name in (set(old_client_settings)
3221
2438
- set(client_settings)):
3223
2440
for client_name in (set(client_settings)
3224
2441
- set(old_client_settings)):
3225
2442
clients_data[client_name] = client_settings[client_name]
3226
2443
3227
2444
# Create all client objects
3228
for client_name, client in clients_data.items():
2445
for client_name, client in clients_data.iteritems():
3229
2446
tcp_server.clients[client_name] = client_class(
3230
name=client_name,
3231
settings=client,
3232
server_settings=server_settings)
3233
2447
name = client_name, settings = client)
2448
3234
2449
if not tcp_server.clients:
3235
2450
logger.warning("No clients defined")
3236
3237
if not foreground:
3238
if pidfile is not None:
3239
pid = os.getpid()
3240
try:
3241
with pidfile:
3242
print(pid, file=pidfile)
3243
except IOError:
3244
logger.error("Could not write to file %r with PID %d",
3245
pidfilename, pid)
3246
del pidfile
2451
2452
if not debug:
2453
try:
2454
with pidfile:
2455
pid = os.getpid()
2456
pidfile.write(str(pid) + "\n".encode("utf-8"))
2457
del pidfile
2458
except IOError:
2459
logger.error("Could not write to file %r with PID %d",
2460
pidfilename, pid)
2461
except NameError:
2462
# "pidfile" was never created
2463
pass
3247
2464
del pidfilename
3248
3249
for termsig in (signal.SIGHUP, signal.SIGTERM):
3250
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3251
lambda: main_loop.quit() and False)
3252
2465
2466
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2467
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2468
3253
2469
if use_dbus:
3254
3255
@alternate_dbus_interfaces(
3256
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3257
class MandosDBusService(DBusObjectWithObjectManager):
2470
@alternate_dbus_interfaces({"se.recompile.Mandos":
2471
"se.bsnet.fukt.Mandos"})
2472
class MandosDBusService(DBusObjectWithProperties):
3258
2473
"""A D-Bus proxy object"""
3259
3260
2474
def __init__(self):
3261
2475
dbus.service.Object.__init__(self, bus, "/")
3262
3263
2476
_interface = "se.recompile.Mandos"
3264
2477
2478
@dbus_interface_annotations(_interface)
2479
def _foo(self):
2480
return { "org.freedesktop.DBus.Property"
2481
".EmitsChangedSignal":
2482
"false"}
2483
3265
2484
@dbus.service.signal(_interface, signature="o")
3266
2485
def ClientAdded(self, objpath):
3267
2486
"D-Bus signal"
3268
2487
pass
3269
2488
3270
2489
@dbus.service.signal(_interface, signature="ss")
3271
2490
def ClientNotFound(self, fingerprint, address):
3272
2491
"D-Bus signal"
3273
2492
pass
3274
3275
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3276
"true"})
2493
3277
2494
@dbus.service.signal(_interface, signature="os")
3278
2495
def ClientRemoved(self, objpath, name):
3279
2496
"D-Bus signal"
3280
2497
pass
3281
3282
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3283
"true"})
2498
3284
2499
@dbus.service.method(_interface, out_signature="ao")
3285
2500
def GetAllClients(self):
3286
2501
"D-Bus method"
3287
return dbus.Array(c.dbus_object_path for c in
3288
tcp_server.clients.values())
3289
3290
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3291
"true"})
2502
return dbus.Array(c.dbus_object_path
2503
for c in
2504
tcp_server.clients.itervalues())
2505
3292
2506
@dbus.service.method(_interface,
3293
2507
out_signature="a{oa{sv}}")
3294
2508
def GetAllClientsWithProperties(self):
3295
2509
"D-Bus method"
3296
2510
return dbus.Dictionary(
3297
{c.dbus_object_path: c.GetAll(
3298
"se.recompile.Mandos.Client")
3299
for c in tcp_server.clients.values()},
2511
((c.dbus_object_path, c.GetAll(""))
2512
for c in tcp_server.clients.itervalues()),
3300
2513
signature="oa{sv}")
3301
2514
3302
2515
@dbus.service.method(_interface, in_signature="o")
3303
2516
def RemoveClient(self, object_path):
3304
2517
"D-Bus method"
3305
for c in tcp_server.clients.values():
2518
for c in tcp_server.clients.itervalues():
3306
2519
if c.dbus_object_path == object_path:
3307
2520
del tcp_server.clients[c.name]
3308
2521
c.remove_from_connection()
3309
# Don't signal the disabling
2522
# Don't signal anything except ClientRemoved
3310
2523
c.disable(quiet=True)
3311
# Emit D-Bus signal for removal
3312
self.client_removed_signal(c)
2524
# Emit D-Bus signal
2525
self.ClientRemoved(object_path, c.name)
3313
2526
return
3314
2527
raise KeyError(object_path)
3315
2528
3316
2529
del _interface
3317
3318
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3319
out_signature="a{oa{sa{sv}}}")
3320
def GetManagedObjects(self):
3321
"""D-Bus method"""
3322
return dbus.Dictionary(
3323
{client.dbus_object_path:
3324
dbus.Dictionary(
3325
{interface: client.GetAll(interface)
3326
for interface in
3327
client._get_all_interface_names()})
3328
for client in tcp_server.clients.values()})
3329
3330
def client_added_signal(self, client):
3331
"""Send the new standard signal and the old signal"""
3332
if use_dbus:
3333
# New standard signal
3334
self.InterfacesAdded(
3335
client.dbus_object_path,
3336
dbus.Dictionary(
3337
{interface: client.GetAll(interface)
3338
for interface in
3339
client._get_all_interface_names()}))
3340
# Old signal
3341
self.ClientAdded(client.dbus_object_path)
3342
3343
def client_removed_signal(self, client):
3344
"""Send the new standard signal and the old signal"""
3345
if use_dbus:
3346
# New standard signal
3347
self.InterfacesRemoved(
3348
client.dbus_object_path,
3349
client._get_all_interface_names())
3350
# Old signal
3351
self.ClientRemoved(client.dbus_object_path,
3352
client.name)
3353
2530
3354
2531
mandos_dbus_service = MandosDBusService()
3355
3356
# Save modules to variables to exempt the modules from being
3357
# unloaded before the function registered with atexit() is run.
3358
mp = multiprocessing
3359
wn = wnull
3360
2532
3361
2533
def cleanup():
3362
2534
"Cleanup function; run on exit"
3363
if zeroconf:
3364
service.cleanup()
3365
3366
mp.active_children()
3367
wn.close()
2535
service.cleanup()
2536
2537
multiprocessing.active_children()
3368
2538
if not (tcp_server.clients or client_settings):
3369
2539
return
3370
2540
3371
2541
# Store client before exiting. Secrets are encrypted with key
3372
2542
# based on what config file has. If config file is
3373
2543
# removed/edited, old secret will thus be unrecovable.
3374
2544
clients = {}
3375
2545
with PGPEngine() as pgp:
3376
for client in tcp_server.clients.values():
2546
for client in tcp_server.clients.itervalues():
3377
2547
key = client_settings[client.name]["secret"]
3378
2548
client.encrypted_secret = pgp.encrypt(client.secret,
3379
2549
key)
3380
2550
client_dict = {}
3381
2551
3382
2552
# A list of attributes that can not be pickled
3383
2553
# + secret.
3384
exclude = {"bus", "changedstate", "secret",
3385
"checker", "server_settings"}
3386
for name, typ in inspect.getmembers(dbus.service
3387
.Object):
2554
exclude = set(("bus", "changedstate", "secret",
2555
"checker"))
2556
for name, typ in (inspect.getmembers
2557
(dbus.service.Object)):
3388
2558
exclude.add(name)
3389
2559
3390
2560
client_dict["encrypted_secret"] = (client
3391
2561
.encrypted_secret)
3392
2562
for attr in client.client_structure:
3393
2563
if attr not in exclude:
3394
2564
client_dict[attr] = getattr(client, attr)
3395
2565
3396
2566
clients[client.name] = client_dict
3397
2567
del client_settings[client.name]["secret"]
3398
2568
3399
2569
try:
3400
with tempfile.NamedTemporaryFile(
3401
mode='wb',
3402
suffix=".pickle",
3403
prefix='clients-',
3404
dir=os.path.dirname(stored_state_path),
3405
delete=False) as stored_state:
3406
pickle.dump((clients, client_settings), stored_state,
3407
protocol=2)
3408
tempname = stored_state.name
2570
with (tempfile.NamedTemporaryFile
2571
(mode='wb', suffix=".pickle", prefix='clients-',
2572
dir=os.path.dirname(stored_state_path),
2573
delete=False)) as stored_state:
2574
pickle.dump((clients, client_settings), stored_state)
2575
tempname=stored_state.name
3409
2576
os.rename(tempname, stored_state_path)
3410
2577
except (IOError, OSError) as e:
3411
2578
if not debug:
3414
2581
except NameError:
3415
2582
pass
3416
2583
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
3417
logger.warning("Could not save persistent state: {}"
2584
logger.warning("Could not save persistent state: {0}"
3418
2585
.format(os.strerror(e.errno)))
3419
2586
else:
3420
2587
logger.warning("Could not save persistent state:",
3421
2588
exc_info=e)
3422
raise
3423
2589
raise e
2590
3424
2591
# Delete all clients, and settings from config
3425
2592
while tcp_server.clients:
3426
2593
name, client = tcp_server.clients.popitem()
3427
2594
if use_dbus:
3428
2595
client.remove_from_connection()
3429
# Don't signal the disabling
2596
# Don't signal anything except ClientRemoved
3430
2597
client.disable(quiet=True)
3431
# Emit D-Bus signal for removal
3432
2598
if use_dbus:
3433
mandos_dbus_service.client_removed_signal(client)
2599
# Emit D-Bus signal
2600
mandos_dbus_service.ClientRemoved(client
2601
.dbus_object_path,
2602
client.name)
3434
2603
client_settings.clear()
3435
2604
3436
2605
atexit.register(cleanup)
3437
3438
for client in tcp_server.clients.values():
2606
2607
for client in tcp_server.clients.itervalues():
3439
2608
if use_dbus:
3440
# Emit D-Bus signal for adding
3441
mandos_dbus_service.client_added_signal(client)
2609
# Emit D-Bus signal
2610
mandos_dbus_service.ClientAdded(client.dbus_object_path)
3442
2611
# Need to initiate checking of clients
3443
2612
if client.enabled:
3444
2613
client.init_checker()
3445
2614
3446
2615
tcp_server.enable()
3447
2616
tcp_server.server_activate()
3448
2617
3449
2618
# Find out what port we got
3450
if zeroconf:
3451
service.port = tcp_server.socket.getsockname()[1]
2619
service.port = tcp_server.socket.getsockname()[1]
3452
2620
if use_ipv6:
3453
2621
logger.info("Now listening on address %r, port %d,"
3454
2622
" flowinfo %d, scope_id %d",
3456
2624
else: # IPv4
3457
2625
logger.info("Now listening on address %r, port %d",
3458
2626
*tcp_server.socket.getsockname())
3459
3460
# service.interface = tcp_server.socket.getsockname()[3]
3461
2627
2628
#service.interface = tcp_server.socket.getsockname()[3]
2629
3462
2630
try:
3463
if zeroconf:
3464
# From the Avahi example code
3465
try:
3466
service.activate()
3467
except dbus.exceptions.DBusException as error:
3468
logger.critical("D-Bus Exception", exc_info=error)
3469
cleanup()
3470
sys.exit(1)
3471
# End of Avahi example code
3472
3473
GLib.io_add_watch(tcp_server.fileno(), GLib.IO_IN,
3474
lambda *args, **kwargs:
3475
(tcp_server.handle_request
3476
(*args[2:], **kwargs) or True))
3477
2631
# From the Avahi example code
2632
try:
2633
service.activate()
2634
except dbus.exceptions.DBusException as error:
2635
logger.critical("D-Bus Exception", exc_info=error)
2636
cleanup()
2637
sys.exit(1)
2638
# End of Avahi example code
2639
2640
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2641
lambda *args, **kwargs:
2642
(tcp_server.handle_request
2643
(*args[2:], **kwargs) or True))
2644
3478
2645
logger.debug("Starting main loop")
3479
2646
main_loop.run()
3480
2647
except AvahiError as error:
3489
2656
# Must run before the D-Bus bus name gets deregistered
3490
2657
cleanup()
3491
2658
3492
3493
2659
if __name__ == '__main__':
3494
2660
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0