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- Committer: Teddy Hogeborn
- Date: 2016-12-12 18:25:02 UTC
- Revision ID: teddy@recompile.se-20161212182502-72seb9hxiu65cgwa
Add spaces around all '=' signs in all C code.
* plugin-runner.c: Add white space around all '=' signs.
* plugins.d/mandos-client.c: - '' -
* plugins.d/plymouth.c: - '' -
* plugin-runner.c: Add white space around all '=' signs.
* plugins.d/mandos-client.c: - '' -
* plugins.d/plymouth.c: - '' -
added
removed
mandos
1
#!/usr/bin/python2.7
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
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# 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 © 2008-2015 Teddy Hogeborn
15
# Copyright © 2008-2015 Björn Påhlsson
16
#
14
# Copyright © 2008-2016 Teddy Hogeborn
15
# Copyright © 2008-2016 Björn Påhlsson
16
#
17
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# This program is free software: you can redistribute it and/or modify
18
18
# it under the terms of the GNU General Public License as published by
19
19
# the Free Software Foundation, either version 3 of the License, or
23
23
# but WITHOUT ANY WARRANTY; without even the implied warranty of
24
24
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
25
25
# GNU General Public License for more details.
26
#
26
#
27
27
# You should have received a copy of the GNU General Public License
28
28
# along with this program. If not, see
29
29
# <http://www.gnu.org/licenses/>.
30
#
30
#
31
31
# Contact the authors at <mandos@recompile.se>.
32
#
32
#
33
33
34
34
from __future__ import (division, absolute_import, print_function,
35
35
unicode_literals)
36
36
37
from future_builtins import *
37
try:
38
from future_builtins import *
39
except ImportError:
40
pass
38
41
39
42
try:
40
43
import SocketServer as socketserver
44
47
import argparse
45
48
import datetime
46
49
import errno
47
import gnutls.crypto
48
import gnutls.connection
49
import gnutls.errors
50
import gnutls.library.functions
51
import gnutls.library.constants
52
import gnutls.library.types
53
50
try:
54
51
import ConfigParser as configparser
55
52
except ImportError:
82
79
83
80
import dbus
84
81
import dbus.service
85
try:
86
import gobject
87
except ImportError:
88
from gi.repository import GObject as gobject
89
import avahi
82
from gi.repository import GLib
90
83
from dbus.mainloop.glib import DBusGMainLoop
91
84
import ctypes
92
85
import ctypes.util
93
86
import xml.dom.minidom
94
87
import inspect
95
88
89
# Try to find the value of SO_BINDTODEVICE:
96
90
try:
91
# This is where SO_BINDTODEVICE is in Python 3.3 (or 3.4?) and
92
# newer, and it is also the most natural place for it:
97
93
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
98
94
except AttributeError:
99
95
try:
96
# This is where SO_BINDTODEVICE was up to and including Python
97
# 2.6, and also 3.2:
100
98
from IN import SO_BINDTODEVICE
101
99
except ImportError:
102
SO_BINDTODEVICE = None
100
# In Python 2.7 it seems to have been removed entirely.
101
# Try running the C preprocessor:
102
try:
103
cc = subprocess.Popen(["cc", "--language=c", "-E",
104
"/dev/stdin"],
105
stdin=subprocess.PIPE,
106
stdout=subprocess.PIPE)
107
stdout = cc.communicate(
108
"#include <sys/socket.h>\nSO_BINDTODEVICE\n")[0]
109
SO_BINDTODEVICE = int(stdout.splitlines()[-1])
110
except (OSError, ValueError, IndexError):
111
# No value found
112
SO_BINDTODEVICE = None
103
113
104
114
if sys.version_info.major == 2:
105
115
str = unicode
106
116
107
version = "1.6.9"
117
version = "1.7.13"
108
118
stored_state_file = "clients.pickle"
109
119
110
120
logger = logging.getLogger()
114
124
if_nametoindex = ctypes.cdll.LoadLibrary(
115
125
ctypes.util.find_library("c")).if_nametoindex
116
126
except (OSError, AttributeError):
117
127
118
128
def if_nametoindex(interface):
119
129
"Get an interface index the hard way, i.e. using fcntl()"
120
130
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
125
135
return interface_index
126
136
127
137
138
def copy_function(func):
139
"""Make a copy of a function"""
140
if sys.version_info.major == 2:
141
return types.FunctionType(func.func_code,
142
func.func_globals,
143
func.func_name,
144
func.func_defaults,
145
func.func_closure)
146
else:
147
return types.FunctionType(func.__code__,
148
func.__globals__,
149
func.__name__,
150
func.__defaults__,
151
func.__closure__)
152
153
128
154
def initlogger(debug, level=logging.WARNING):
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155
"""init logger and add loglevel"""
130
156
131
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global syslogger
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158
syslogger = (logging.handlers.SysLogHandler(
133
facility = logging.handlers.SysLogHandler.LOG_DAEMON,
134
address = "/dev/log"))
159
facility=logging.handlers.SysLogHandler.LOG_DAEMON,
160
address="/dev/log"))
135
161
syslogger.setFormatter(logging.Formatter
136
162
('Mandos [%(process)d]: %(levelname)s:'
137
163
' %(message)s'))
138
164
logger.addHandler(syslogger)
139
165
140
166
if debug:
141
167
console = logging.StreamHandler()
142
168
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
154
180
155
181
class PGPEngine(object):
156
182
"""A simple class for OpenPGP symmetric encryption & decryption"""
157
183
158
184
def __init__(self):
159
185
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
186
self.gpg = "gpg"
187
try:
188
output = subprocess.check_output(["gpgconf"])
189
for line in output.splitlines():
190
name, text, path = line.split(b":")
191
if name == "gpg":
192
self.gpg = path
193
break
194
except OSError as e:
195
if e.errno != errno.ENOENT:
196
raise
160
197
self.gnupgargs = ['--batch',
161
'--home', self.tempdir,
198
'--homedir', self.tempdir,
162
199
'--force-mdc',
163
'--quiet',
164
'--no-use-agent']
165
200
'--quiet']
201
# Only GPG version 1 has the --no-use-agent option.
202
if self.gpg == "gpg" or self.gpg.endswith("/gpg"):
203
self.gnupgargs.append("--no-use-agent")
204
166
205
def __enter__(self):
167
206
return self
168
207
169
208
def __exit__(self, exc_type, exc_value, traceback):
170
209
self._cleanup()
171
210
return False
172
211
173
212
def __del__(self):
174
213
self._cleanup()
175
214
176
215
def _cleanup(self):
177
216
if self.tempdir is not None:
178
217
# Delete contents of tempdir
179
218
for root, dirs, files in os.walk(self.tempdir,
180
topdown = False):
219
topdown=False):
181
220
for filename in files:
182
221
os.remove(os.path.join(root, filename))
183
222
for dirname in dirs:
185
224
# Remove tempdir
186
225
os.rmdir(self.tempdir)
187
226
self.tempdir = None
188
227
189
228
def password_encode(self, password):
190
229
# Passphrase can not be empty and can not contain newlines or
191
230
# NUL bytes. So we prefix it and hex encode it.
196
235
.replace(b"\n", b"\\n")
197
236
.replace(b"\0", b"\\x00"))
198
237
return encoded
199
238
200
239
def encrypt(self, data, password):
201
240
passphrase = self.password_encode(password)
202
241
with tempfile.NamedTemporaryFile(
203
242
dir=self.tempdir) as passfile:
204
243
passfile.write(passphrase)
205
244
passfile.flush()
206
proc = subprocess.Popen(['gpg', '--symmetric',
245
proc = subprocess.Popen([self.gpg, '--symmetric',
207
246
'--passphrase-file',
208
247
passfile.name]
209
248
+ self.gnupgargs,
210
stdin = subprocess.PIPE,
211
stdout = subprocess.PIPE,
212
stderr = subprocess.PIPE)
213
ciphertext, err = proc.communicate(input = data)
249
stdin=subprocess.PIPE,
250
stdout=subprocess.PIPE,
251
stderr=subprocess.PIPE)
252
ciphertext, err = proc.communicate(input=data)
214
253
if proc.returncode != 0:
215
254
raise PGPError(err)
216
255
return ciphertext
217
256
218
257
def decrypt(self, data, password):
219
258
passphrase = self.password_encode(password)
220
259
with tempfile.NamedTemporaryFile(
221
dir = self.tempdir) as passfile:
260
dir=self.tempdir) as passfile:
222
261
passfile.write(passphrase)
223
262
passfile.flush()
224
proc = subprocess.Popen(['gpg', '--decrypt',
263
proc = subprocess.Popen([self.gpg, '--decrypt',
225
264
'--passphrase-file',
226
265
passfile.name]
227
266
+ self.gnupgargs,
228
stdin = subprocess.PIPE,
229
stdout = subprocess.PIPE,
230
stderr = subprocess.PIPE)
231
decrypted_plaintext, err = proc.communicate(input = data)
267
stdin=subprocess.PIPE,
268
stdout=subprocess.PIPE,
269
stderr=subprocess.PIPE)
270
decrypted_plaintext, err = proc.communicate(input=data)
232
271
if proc.returncode != 0:
233
272
raise PGPError(err)
234
273
return decrypted_plaintext
235
274
236
275
276
# Pretend that we have an Avahi module
277
class Avahi(object):
278
"""This isn't so much a class as it is a module-like namespace.
279
It is instantiated once, and simulates having an Avahi module."""
280
IF_UNSPEC = -1 # avahi-common/address.h
281
PROTO_UNSPEC = -1 # avahi-common/address.h
282
PROTO_INET = 0 # avahi-common/address.h
283
PROTO_INET6 = 1 # avahi-common/address.h
284
DBUS_NAME = "org.freedesktop.Avahi"
285
DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"
286
DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"
287
DBUS_PATH_SERVER = "/"
288
289
def string_array_to_txt_array(self, t):
290
return dbus.Array((dbus.ByteArray(s.encode("utf-8"))
291
for s in t), signature="ay")
292
ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h
293
ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h
294
ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h
295
SERVER_INVALID = 0 # avahi-common/defs.h
296
SERVER_REGISTERING = 1 # avahi-common/defs.h
297
SERVER_RUNNING = 2 # avahi-common/defs.h
298
SERVER_COLLISION = 3 # avahi-common/defs.h
299
SERVER_FAILURE = 4 # avahi-common/defs.h
300
avahi = Avahi()
301
302
237
303
class AvahiError(Exception):
238
304
def __init__(self, value, *args, **kwargs):
239
305
self.value = value
251
317
252
318
class AvahiService(object):
253
319
"""An Avahi (Zeroconf) service.
254
320
255
321
Attributes:
256
322
interface: integer; avahi.IF_UNSPEC or an interface index.
257
323
Used to optionally bind to the specified interface.
269
335
server: D-Bus Server
270
336
bus: dbus.SystemBus()
271
337
"""
272
338
273
339
def __init__(self,
274
interface = avahi.IF_UNSPEC,
275
name = None,
276
servicetype = None,
277
port = None,
278
TXT = None,
279
domain = "",
280
host = "",
281
max_renames = 32768,
282
protocol = avahi.PROTO_UNSPEC,
283
bus = None):
340
interface=avahi.IF_UNSPEC,
341
name=None,
342
servicetype=None,
343
port=None,
344
TXT=None,
345
domain="",
346
host="",
347
max_renames=32768,
348
protocol=avahi.PROTO_UNSPEC,
349
bus=None):
284
350
self.interface = interface
285
351
self.name = name
286
352
self.type = servicetype
295
361
self.server = None
296
362
self.bus = bus
297
363
self.entry_group_state_changed_match = None
298
364
299
365
def rename(self, remove=True):
300
366
"""Derived from the Avahi example code"""
301
367
if self.rename_count >= self.max_renames:
321
387
logger.critical("D-Bus Exception", exc_info=error)
322
388
self.cleanup()
323
389
os._exit(1)
324
390
325
391
def remove(self):
326
392
"""Derived from the Avahi example code"""
327
393
if self.entry_group_state_changed_match is not None:
329
395
self.entry_group_state_changed_match = None
330
396
if self.group is not None:
331
397
self.group.Reset()
332
398
333
399
def add(self):
334
400
"""Derived from the Avahi example code"""
335
401
self.remove()
352
418
dbus.UInt16(self.port),
353
419
avahi.string_array_to_txt_array(self.TXT))
354
420
self.group.Commit()
355
421
356
422
def entry_group_state_changed(self, state, error):
357
423
"""Derived from the Avahi example code"""
358
424
logger.debug("Avahi entry group state change: %i", state)
359
425
360
426
if state == avahi.ENTRY_GROUP_ESTABLISHED:
361
427
logger.debug("Zeroconf service established.")
362
428
elif state == avahi.ENTRY_GROUP_COLLISION:
366
432
logger.critical("Avahi: Error in group state changed %s",
367
433
str(error))
368
434
raise AvahiGroupError("State changed: {!s}".format(error))
369
435
370
436
def cleanup(self):
371
437
"""Derived from the Avahi example code"""
372
438
if self.group is not None:
377
443
pass
378
444
self.group = None
379
445
self.remove()
380
446
381
447
def server_state_changed(self, state, error=None):
382
448
"""Derived from the Avahi example code"""
383
449
logger.debug("Avahi server state change: %i", state)
412
478
logger.debug("Unknown state: %r", state)
413
479
else:
414
480
logger.debug("Unknown state: %r: %r", state, error)
415
481
416
482
def activate(self):
417
483
"""Derived from the Avahi example code"""
418
484
if self.server is None:
435
501
.format(self.name)))
436
502
return ret
437
503
504
505
# Pretend that we have a GnuTLS module
506
class GnuTLS(object):
507
"""This isn't so much a class as it is a module-like namespace.
508
It is instantiated once, and simulates having a GnuTLS module."""
509
510
library = ctypes.util.find_library("gnutls")
511
if library is None:
512
library = ctypes.util.find_library("gnutls-deb0")
513
_library = ctypes.cdll.LoadLibrary(library)
514
del library
515
_need_version = b"3.3.0"
516
517
def __init__(self):
518
# Need to use "self" here, since this method is called before
519
# the assignment to the "gnutls" global variable happens.
520
if self.check_version(self._need_version) is None:
521
raise self.Error("Needs GnuTLS {} or later"
522
.format(self._need_version))
523
524
# Unless otherwise indicated, the constants and types below are
525
# all from the gnutls/gnutls.h C header file.
526
527
# Constants
528
E_SUCCESS = 0
529
E_INTERRUPTED = -52
530
E_AGAIN = -28
531
CRT_OPENPGP = 2
532
CLIENT = 2
533
SHUT_RDWR = 0
534
CRD_CERTIFICATE = 1
535
E_NO_CERTIFICATE_FOUND = -49
536
OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
537
538
# Types
539
class session_int(ctypes.Structure):
540
_fields_ = []
541
session_t = ctypes.POINTER(session_int)
542
543
class certificate_credentials_st(ctypes.Structure):
544
_fields_ = []
545
certificate_credentials_t = ctypes.POINTER(
546
certificate_credentials_st)
547
certificate_type_t = ctypes.c_int
548
549
class datum_t(ctypes.Structure):
550
_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
551
('size', ctypes.c_uint)]
552
553
class openpgp_crt_int(ctypes.Structure):
554
_fields_ = []
555
openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
556
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
557
log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
558
credentials_type_t = ctypes.c_int
559
transport_ptr_t = ctypes.c_void_p
560
close_request_t = ctypes.c_int
561
562
# Exceptions
563
class Error(Exception):
564
# We need to use the class name "GnuTLS" here, since this
565
# exception might be raised from within GnuTLS.__init__,
566
# which is called before the assignment to the "gnutls"
567
# global variable has happened.
568
def __init__(self, message=None, code=None, args=()):
569
# Default usage is by a message string, but if a return
570
# code is passed, convert it to a string with
571
# gnutls.strerror()
572
self.code = code
573
if message is None and code is not None:
574
message = GnuTLS.strerror(code)
575
return super(GnuTLS.Error, self).__init__(
576
message, *args)
577
578
class CertificateSecurityError(Error):
579
pass
580
581
# Classes
582
class Credentials(object):
583
def __init__(self):
584
self._c_object = gnutls.certificate_credentials_t()
585
gnutls.certificate_allocate_credentials(
586
ctypes.byref(self._c_object))
587
self.type = gnutls.CRD_CERTIFICATE
588
589
def __del__(self):
590
gnutls.certificate_free_credentials(self._c_object)
591
592
class ClientSession(object):
593
def __init__(self, socket, credentials=None):
594
self._c_object = gnutls.session_t()
595
gnutls.init(ctypes.byref(self._c_object), gnutls.CLIENT)
596
gnutls.set_default_priority(self._c_object)
597
gnutls.transport_set_ptr(self._c_object, socket.fileno())
598
gnutls.handshake_set_private_extensions(self._c_object,
599
True)
600
self.socket = socket
601
if credentials is None:
602
credentials = gnutls.Credentials()
603
gnutls.credentials_set(self._c_object, credentials.type,
604
ctypes.cast(credentials._c_object,
605
ctypes.c_void_p))
606
self.credentials = credentials
607
608
def __del__(self):
609
gnutls.deinit(self._c_object)
610
611
def handshake(self):
612
return gnutls.handshake(self._c_object)
613
614
def send(self, data):
615
data = bytes(data)
616
data_len = len(data)
617
while data_len > 0:
618
data_len -= gnutls.record_send(self._c_object,
619
data[-data_len:],
620
data_len)
621
622
def bye(self):
623
return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
624
625
# Error handling functions
626
def _error_code(result):
627
"""A function to raise exceptions on errors, suitable
628
for the 'restype' attribute on ctypes functions"""
629
if result >= 0:
630
return result
631
if result == gnutls.E_NO_CERTIFICATE_FOUND:
632
raise gnutls.CertificateSecurityError(code=result)
633
raise gnutls.Error(code=result)
634
635
def _retry_on_error(result, func, arguments):
636
"""A function to retry on some errors, suitable
637
for the 'errcheck' attribute on ctypes functions"""
638
while result < 0:
639
if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
640
return _error_code(result)
641
result = func(*arguments)
642
return result
643
644
# Unless otherwise indicated, the function declarations below are
645
# all from the gnutls/gnutls.h C header file.
646
647
# Functions
648
priority_set_direct = _library.gnutls_priority_set_direct
649
priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
650
ctypes.POINTER(ctypes.c_char_p)]
651
priority_set_direct.restype = _error_code
652
653
init = _library.gnutls_init
654
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
655
init.restype = _error_code
656
657
set_default_priority = _library.gnutls_set_default_priority
658
set_default_priority.argtypes = [session_t]
659
set_default_priority.restype = _error_code
660
661
record_send = _library.gnutls_record_send
662
record_send.argtypes = [session_t, ctypes.c_void_p,
663
ctypes.c_size_t]
664
record_send.restype = ctypes.c_ssize_t
665
record_send.errcheck = _retry_on_error
666
667
certificate_allocate_credentials = (
668
_library.gnutls_certificate_allocate_credentials)
669
certificate_allocate_credentials.argtypes = [
670
ctypes.POINTER(certificate_credentials_t)]
671
certificate_allocate_credentials.restype = _error_code
672
673
certificate_free_credentials = (
674
_library.gnutls_certificate_free_credentials)
675
certificate_free_credentials.argtypes = [
676
certificate_credentials_t]
677
certificate_free_credentials.restype = None
678
679
handshake_set_private_extensions = (
680
_library.gnutls_handshake_set_private_extensions)
681
handshake_set_private_extensions.argtypes = [session_t,
682
ctypes.c_int]
683
handshake_set_private_extensions.restype = None
684
685
credentials_set = _library.gnutls_credentials_set
686
credentials_set.argtypes = [session_t, credentials_type_t,
687
ctypes.c_void_p]
688
credentials_set.restype = _error_code
689
690
strerror = _library.gnutls_strerror
691
strerror.argtypes = [ctypes.c_int]
692
strerror.restype = ctypes.c_char_p
693
694
certificate_type_get = _library.gnutls_certificate_type_get
695
certificate_type_get.argtypes = [session_t]
696
certificate_type_get.restype = _error_code
697
698
certificate_get_peers = _library.gnutls_certificate_get_peers
699
certificate_get_peers.argtypes = [session_t,
700
ctypes.POINTER(ctypes.c_uint)]
701
certificate_get_peers.restype = ctypes.POINTER(datum_t)
702
703
global_set_log_level = _library.gnutls_global_set_log_level
704
global_set_log_level.argtypes = [ctypes.c_int]
705
global_set_log_level.restype = None
706
707
global_set_log_function = _library.gnutls_global_set_log_function
708
global_set_log_function.argtypes = [log_func]
709
global_set_log_function.restype = None
710
711
deinit = _library.gnutls_deinit
712
deinit.argtypes = [session_t]
713
deinit.restype = None
714
715
handshake = _library.gnutls_handshake
716
handshake.argtypes = [session_t]
717
handshake.restype = _error_code
718
handshake.errcheck = _retry_on_error
719
720
transport_set_ptr = _library.gnutls_transport_set_ptr
721
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
722
transport_set_ptr.restype = None
723
724
bye = _library.gnutls_bye
725
bye.argtypes = [session_t, close_request_t]
726
bye.restype = _error_code
727
bye.errcheck = _retry_on_error
728
729
check_version = _library.gnutls_check_version
730
check_version.argtypes = [ctypes.c_char_p]
731
check_version.restype = ctypes.c_char_p
732
733
# All the function declarations below are from gnutls/openpgp.h
734
735
openpgp_crt_init = _library.gnutls_openpgp_crt_init
736
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
737
openpgp_crt_init.restype = _error_code
738
739
openpgp_crt_import = _library.gnutls_openpgp_crt_import
740
openpgp_crt_import.argtypes = [openpgp_crt_t,
741
ctypes.POINTER(datum_t),
742
openpgp_crt_fmt_t]
743
openpgp_crt_import.restype = _error_code
744
745
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
746
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
747
ctypes.POINTER(ctypes.c_uint)]
748
openpgp_crt_verify_self.restype = _error_code
749
750
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
751
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
752
openpgp_crt_deinit.restype = None
753
754
openpgp_crt_get_fingerprint = (
755
_library.gnutls_openpgp_crt_get_fingerprint)
756
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
757
ctypes.c_void_p,
758
ctypes.POINTER(
759
ctypes.c_size_t)]
760
openpgp_crt_get_fingerprint.restype = _error_code
761
762
# Remove non-public functions
763
del _error_code, _retry_on_error
764
# Create the global "gnutls" object, simulating a module
765
gnutls = GnuTLS()
766
767
438
768
def call_pipe(connection, # : multiprocessing.Connection
439
769
func, *args, **kwargs):
440
770
"""This function is meant to be called by multiprocessing.Process
441
771
442
772
This function runs func(*args, **kwargs), and writes the resulting
443
773
return value on the provided multiprocessing.Connection.
444
774
"""
445
775
connection.send(func(*args, **kwargs))
446
776
connection.close()
447
777
778
448
779
class Client(object):
449
780
"""A representation of a client host served by this server.
450
781
451
782
Attributes:
452
783
approved: bool(); 'None' if not yet approved/disapproved
453
784
approval_delay: datetime.timedelta(); Time to wait for approval
455
786
checker: subprocess.Popen(); a running checker process used
456
787
to see if the client lives.
457
788
'None' if no process is running.
458
checker_callback_tag: a gobject event source tag, or None
789
checker_callback_tag: a GLib event source tag, or None
459
790
checker_command: string; External command which is run to check
460
791
if client lives. %() expansions are done at
461
792
runtime with vars(self) as dict, so that for
462
793
instance %(name)s can be used in the command.
463
checker_initiator_tag: a gobject event source tag, or None
794
checker_initiator_tag: a GLib event source tag, or None
464
795
created: datetime.datetime(); (UTC) object creation
465
796
client_structure: Object describing what attributes a client has
466
797
and is used for storing the client at exit
467
798
current_checker_command: string; current running checker_command
468
disable_initiator_tag: a gobject event source tag, or None
799
disable_initiator_tag: a GLib event source tag, or None
469
800
enabled: bool()
470
801
fingerprint: string (40 or 32 hexadecimal digits); used to
471
802
uniquely identify the client
490
821
disabled, or None
491
822
server_settings: The server_settings dict from main()
492
823
"""
493
824
494
825
runtime_expansions = ("approval_delay", "approval_duration",
495
826
"created", "enabled", "expires",
496
827
"fingerprint", "host", "interval",
507
838
"approved_by_default": "True",
508
839
"enabled": "True",
509
840
}
510
841
511
842
@staticmethod
512
843
def config_parser(config):
513
844
"""Construct a new dict of client settings of this form:
520
851
for client_name in config.sections():
521
852
section = dict(config.items(client_name))
522
853
client = settings[client_name] = {}
523
854
524
855
client["host"] = section["host"]
525
856
# Reformat values from string types to Python types
526
857
client["approved_by_default"] = config.getboolean(
527
858
client_name, "approved_by_default")
528
859
client["enabled"] = config.getboolean(client_name,
529
860
"enabled")
530
861
531
862
# Uppercase and remove spaces from fingerprint for later
532
863
# comparison purposes with return value from the
533
864
# fingerprint() function
534
865
client["fingerprint"] = (section["fingerprint"].upper()
535
866
.replace(" ", ""))
536
867
if "secret" in section:
537
client["secret"] = section["secret"].decode("base64")
868
client["secret"] = codecs.decode(section["secret"]
869
.encode("utf-8"),
870
"base64")
538
871
elif "secfile" in section:
539
872
with open(os.path.expanduser(os.path.expandvars
540
873
(section["secfile"])),
555
888
client["last_approval_request"] = None
556
889
client["last_checked_ok"] = None
557
890
client["last_checker_status"] = -2
558
891
559
892
return settings
560
561
def __init__(self, settings, name = None, server_settings=None):
893
894
def __init__(self, settings, name=None, server_settings=None):
562
895
self.name = name
563
896
if server_settings is None:
564
897
server_settings = {}
566
899
# adding all client settings
567
900
for setting, value in settings.items():
568
901
setattr(self, setting, value)
569
902
570
903
if self.enabled:
571
904
if not hasattr(self, "last_enabled"):
572
905
self.last_enabled = datetime.datetime.utcnow()
576
909
else:
577
910
self.last_enabled = None
578
911
self.expires = None
579
912
580
913
logger.debug("Creating client %r", self.name)
581
914
logger.debug(" Fingerprint: %s", self.fingerprint)
582
915
self.created = settings.get("created",
583
916
datetime.datetime.utcnow())
584
917
585
918
# attributes specific for this server instance
586
919
self.checker = None
587
920
self.checker_initiator_tag = None
593
926
self.changedstate = multiprocessing_manager.Condition(
594
927
multiprocessing_manager.Lock())
595
928
self.client_structure = [attr
596
for attr in self.__dict__.iterkeys()
929
for attr in self.__dict__.keys()
597
930
if not attr.startswith("_")]
598
931
self.client_structure.append("client_structure")
599
932
600
933
for name, t in inspect.getmembers(
601
934
type(self), lambda obj: isinstance(obj, property)):
602
935
if not name.startswith("_"):
603
936
self.client_structure.append(name)
604
937
605
938
# Send notice to process children that client state has changed
606
939
def send_changedstate(self):
607
940
with self.changedstate:
608
941
self.changedstate.notify_all()
609
942
610
943
def enable(self):
611
944
"""Start this client's checker and timeout hooks"""
612
945
if getattr(self, "enabled", False):
617
950
self.last_enabled = datetime.datetime.utcnow()
618
951
self.init_checker()
619
952
self.send_changedstate()
620
953
621
954
def disable(self, quiet=True):
622
955
"""Disable this client."""
623
956
if not getattr(self, "enabled", False):
625
958
if not quiet:
626
959
logger.info("Disabling client %s", self.name)
627
960
if getattr(self, "disable_initiator_tag", None) is not None:
628
gobject.source_remove(self.disable_initiator_tag)
961
GLib.source_remove(self.disable_initiator_tag)
629
962
self.disable_initiator_tag = None
630
963
self.expires = None
631
964
if getattr(self, "checker_initiator_tag", None) is not None:
632
gobject.source_remove(self.checker_initiator_tag)
965
GLib.source_remove(self.checker_initiator_tag)
633
966
self.checker_initiator_tag = None
634
967
self.stop_checker()
635
968
self.enabled = False
636
969
if not quiet:
637
970
self.send_changedstate()
638
# Do not run this again if called by a gobject.timeout_add
971
# Do not run this again if called by a GLib.timeout_add
639
972
return False
640
973
641
974
def __del__(self):
642
975
self.disable()
643
976
644
977
def init_checker(self):
645
978
# Schedule a new checker to be started an 'interval' from now,
646
979
# and every interval from then on.
647
980
if self.checker_initiator_tag is not None:
648
gobject.source_remove(self.checker_initiator_tag)
649
self.checker_initiator_tag = gobject.timeout_add(
981
GLib.source_remove(self.checker_initiator_tag)
982
self.checker_initiator_tag = GLib.timeout_add(
650
983
int(self.interval.total_seconds() * 1000),
651
984
self.start_checker)
652
985
# Schedule a disable() when 'timeout' has passed
653
986
if self.disable_initiator_tag is not None:
654
gobject.source_remove(self.disable_initiator_tag)
655
self.disable_initiator_tag = gobject.timeout_add(
987
GLib.source_remove(self.disable_initiator_tag)
988
self.disable_initiator_tag = GLib.timeout_add(
656
989
int(self.timeout.total_seconds() * 1000), self.disable)
657
990
# Also start a new checker *right now*.
658
991
self.start_checker()
659
992
660
993
def checker_callback(self, source, condition, connection,
661
994
command):
662
995
"""The checker has completed, so take appropriate actions."""
665
998
# Read return code from connection (see call_pipe)
666
999
returncode = connection.recv()
667
1000
connection.close()
668
1001
669
1002
if returncode >= 0:
670
1003
self.last_checker_status = returncode
671
1004
self.last_checker_signal = None
681
1014
logger.warning("Checker for %(name)s crashed?",
682
1015
vars(self))
683
1016
return False
684
1017
685
1018
def checked_ok(self):
686
1019
"""Assert that the client has been seen, alive and well."""
687
1020
self.last_checked_ok = datetime.datetime.utcnow()
688
1021
self.last_checker_status = 0
689
1022
self.last_checker_signal = None
690
1023
self.bump_timeout()
691
1024
692
1025
def bump_timeout(self, timeout=None):
693
1026
"""Bump up the timeout for this client."""
694
1027
if timeout is None:
695
1028
timeout = self.timeout
696
1029
if self.disable_initiator_tag is not None:
697
gobject.source_remove(self.disable_initiator_tag)
1030
GLib.source_remove(self.disable_initiator_tag)
698
1031
self.disable_initiator_tag = None
699
1032
if getattr(self, "enabled", False):
700
self.disable_initiator_tag = gobject.timeout_add(
1033
self.disable_initiator_tag = GLib.timeout_add(
701
1034
int(timeout.total_seconds() * 1000), self.disable)
702
1035
self.expires = datetime.datetime.utcnow() + timeout
703
1036
704
1037
def need_approval(self):
705
1038
self.last_approval_request = datetime.datetime.utcnow()
706
1039
707
1040
def start_checker(self):
708
1041
"""Start a new checker subprocess if one is not running.
709
1042
710
1043
If a checker already exists, leave it running and do
711
1044
nothing."""
712
1045
# The reason for not killing a running checker is that if we
717
1050
# checkers alone, the checker would have to take more time
718
1051
# than 'timeout' for the client to be disabled, which is as it
719
1052
# should be.
720
1053
721
1054
if self.checker is not None and not self.checker.is_alive():
722
1055
logger.warning("Checker was not alive; joining")
723
1056
self.checker.join()
727
1060
# Escape attributes for the shell
728
1061
escaped_attrs = {
729
1062
attr: re.escape(str(getattr(self, attr)))
730
for attr in self.runtime_expansions }
1063
for attr in self.runtime_expansions}
731
1064
try:
732
1065
command = self.checker_command % escaped_attrs
733
1066
except TypeError as error:
745
1078
# The exception is when not debugging but nevertheless
746
1079
# running in the foreground; use the previously
747
1080
# created wnull.
748
popen_args = { "close_fds": True,
749
"shell": True,
750
"cwd": "/" }
1081
popen_args = {"close_fds": True,
1082
"shell": True,
1083
"cwd": "/"}
751
1084
if (not self.server_settings["debug"]
752
1085
and self.server_settings["foreground"]):
753
1086
popen_args.update({"stdout": wnull,
754
"stderr": wnull })
755
pipe = multiprocessing.Pipe(duplex = False)
1087
"stderr": wnull})
1088
pipe = multiprocessing.Pipe(duplex=False)
756
1089
self.checker = multiprocessing.Process(
757
target = call_pipe,
758
args = (pipe[1], subprocess.call, command),
759
kwargs = popen_args)
1090
target=call_pipe,
1091
args=(pipe[1], subprocess.call, command),
1092
kwargs=popen_args)
760
1093
self.checker.start()
761
self.checker_callback_tag = gobject.io_add_watch(
762
pipe[0].fileno(), gobject.IO_IN,
1094
self.checker_callback_tag = GLib.io_add_watch(
1095
pipe[0].fileno(), GLib.IO_IN,
763
1096
self.checker_callback, pipe[0], command)
764
# Re-run this periodically if run by gobject.timeout_add
1097
# Re-run this periodically if run by GLib.timeout_add
765
1098
return True
766
1099
767
1100
def stop_checker(self):
768
1101
"""Force the checker process, if any, to stop."""
769
1102
if self.checker_callback_tag:
770
gobject.source_remove(self.checker_callback_tag)
1103
GLib.source_remove(self.checker_callback_tag)
771
1104
self.checker_callback_tag = None
772
1105
if getattr(self, "checker", None) is None:
773
1106
return
782
1115
byte_arrays=False):
783
1116
"""Decorators for marking methods of a DBusObjectWithProperties to
784
1117
become properties on the D-Bus.
785
1118
786
1119
The decorated method will be called with no arguments by "Get"
787
1120
and with one argument by "Set".
788
1121
789
1122
The parameters, where they are supported, are the same as
790
1123
dbus.service.method, except there is only "signature", since the
791
1124
type from Get() and the type sent to Set() is the same.
795
1128
if byte_arrays and signature != "ay":
796
1129
raise ValueError("Byte arrays not supported for non-'ay'"
797
1130
" signature {!r}".format(signature))
798
1131
799
1132
def decorator(func):
800
1133
func._dbus_is_property = True
801
1134
func._dbus_interface = dbus_interface
804
1137
func._dbus_name = func.__name__
805
1138
if func._dbus_name.endswith("_dbus_property"):
806
1139
func._dbus_name = func._dbus_name[:-14]
807
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
1140
func._dbus_get_args_options = {'byte_arrays': byte_arrays}
808
1141
return func
809
1142
810
1143
return decorator
811
1144
812
1145
813
1146
def dbus_interface_annotations(dbus_interface):
814
1147
"""Decorator for marking functions returning interface annotations
815
1148
816
1149
Usage:
817
1150
818
1151
@dbus_interface_annotations("org.example.Interface")
819
1152
def _foo(self): # Function name does not matter
820
1153
return {"org.freedesktop.DBus.Deprecated": "true",
821
1154
"org.freedesktop.DBus.Property.EmitsChangedSignal":
822
1155
"false"}
823
1156
"""
824
1157
825
1158
def decorator(func):
826
1159
func._dbus_is_interface = True
827
1160
func._dbus_interface = dbus_interface
828
1161
func._dbus_name = dbus_interface
829
1162
return func
830
1163
831
1164
return decorator
832
1165
833
1166
834
1167
def dbus_annotations(annotations):
835
1168
"""Decorator to annotate D-Bus methods, signals or properties
836
1169
Usage:
837
1170
838
1171
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
839
1172
"org.freedesktop.DBus.Property."
840
1173
"EmitsChangedSignal": "false"})
842
1175
access="r")
843
1176
def Property_dbus_property(self):
844
1177
return dbus.Boolean(False)
1178
1179
See also the DBusObjectWithAnnotations class.
845
1180
"""
846
1181
847
1182
def decorator(func):
848
1183
func._dbus_annotations = annotations
849
1184
return func
850
1185
851
1186
return decorator
852
1187
853
1188
869
1204
pass
870
1205
871
1206
872
class DBusObjectWithProperties(dbus.service.Object):
873
"""A D-Bus object with properties.
874
875
Classes inheriting from this can use the dbus_service_property
876
decorator to expose methods as D-Bus properties. It exposes the
877
standard Get(), Set(), and GetAll() methods on the D-Bus.
1207
class DBusObjectWithAnnotations(dbus.service.Object):
1208
"""A D-Bus object with annotations.
1209
1210
Classes inheriting from this can use the dbus_annotations
1211
decorator to add annotations to methods or signals.
878
1212
"""
879
1213
880
1214
@staticmethod
881
1215
def _is_dbus_thing(thing):
882
1216
"""Returns a function testing if an attribute is a D-Bus thing
883
1217
884
1218
If called like _is_dbus_thing("method") it returns a function
885
1219
suitable for use as predicate to inspect.getmembers().
886
1220
"""
887
1221
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
888
1222
False)
889
1223
890
1224
def _get_all_dbus_things(self, thing):
891
1225
"""Returns a generator of (name, attribute) pairs
892
1226
"""
895
1229
for cls in self.__class__.__mro__
896
1230
for name, athing in
897
1231
inspect.getmembers(cls, self._is_dbus_thing(thing)))
898
1232
1233
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1234
out_signature="s",
1235
path_keyword='object_path',
1236
connection_keyword='connection')
1237
def Introspect(self, object_path, connection):
1238
"""Overloading of standard D-Bus method.
1239
1240
Inserts annotation tags on methods and signals.
1241
"""
1242
xmlstring = dbus.service.Object.Introspect(self, object_path,
1243
connection)
1244
try:
1245
document = xml.dom.minidom.parseString(xmlstring)
1246
1247
for if_tag in document.getElementsByTagName("interface"):
1248
# Add annotation tags
1249
for typ in ("method", "signal"):
1250
for tag in if_tag.getElementsByTagName(typ):
1251
annots = dict()
1252
for name, prop in (self.
1253
_get_all_dbus_things(typ)):
1254
if (name == tag.getAttribute("name")
1255
and prop._dbus_interface
1256
== if_tag.getAttribute("name")):
1257
annots.update(getattr(
1258
prop, "_dbus_annotations", {}))
1259
for name, value in annots.items():
1260
ann_tag = document.createElement(
1261
"annotation")
1262
ann_tag.setAttribute("name", name)
1263
ann_tag.setAttribute("value", value)
1264
tag.appendChild(ann_tag)
1265
# Add interface annotation tags
1266
for annotation, value in dict(
1267
itertools.chain.from_iterable(
1268
annotations().items()
1269
for name, annotations
1270
in self._get_all_dbus_things("interface")
1271
if name == if_tag.getAttribute("name")
1272
)).items():
1273
ann_tag = document.createElement("annotation")
1274
ann_tag.setAttribute("name", annotation)
1275
ann_tag.setAttribute("value", value)
1276
if_tag.appendChild(ann_tag)
1277
# Fix argument name for the Introspect method itself
1278
if (if_tag.getAttribute("name")
1279
== dbus.INTROSPECTABLE_IFACE):
1280
for cn in if_tag.getElementsByTagName("method"):
1281
if cn.getAttribute("name") == "Introspect":
1282
for arg in cn.getElementsByTagName("arg"):
1283
if (arg.getAttribute("direction")
1284
== "out"):
1285
arg.setAttribute("name",
1286
"xml_data")
1287
xmlstring = document.toxml("utf-8")
1288
document.unlink()
1289
except (AttributeError, xml.dom.DOMException,
1290
xml.parsers.expat.ExpatError) as error:
1291
logger.error("Failed to override Introspection method",
1292
exc_info=error)
1293
return xmlstring
1294
1295
1296
class DBusObjectWithProperties(DBusObjectWithAnnotations):
1297
"""A D-Bus object with properties.
1298
1299
Classes inheriting from this can use the dbus_service_property
1300
decorator to expose methods as D-Bus properties. It exposes the
1301
standard Get(), Set(), and GetAll() methods on the D-Bus.
1302
"""
1303
899
1304
def _get_dbus_property(self, interface_name, property_name):
900
1305
"""Returns a bound method if one exists which is a D-Bus
901
1306
property with the specified name and interface.
906
1311
if (value._dbus_name == property_name
907
1312
and value._dbus_interface == interface_name):
908
1313
return value.__get__(self)
909
1314
910
1315
# No such property
911
1316
raise DBusPropertyNotFound("{}:{}.{}".format(
912
1317
self.dbus_object_path, interface_name, property_name))
913
1318
1319
@classmethod
1320
def _get_all_interface_names(cls):
1321
"""Get a sequence of all interfaces supported by an object"""
1322
return (name for name in set(getattr(getattr(x, attr),
1323
"_dbus_interface", None)
1324
for x in (inspect.getmro(cls))
1325
for attr in dir(x))
1326
if name is not None)
1327
914
1328
@dbus.service.method(dbus.PROPERTIES_IFACE,
915
1329
in_signature="ss",
916
1330
out_signature="v")
924
1338
if not hasattr(value, "variant_level"):
925
1339
return value
926
1340
return type(value)(value, variant_level=value.variant_level+1)
927
1341
928
1342
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
929
1343
def Set(self, interface_name, property_name, value):
930
1344
"""Standard D-Bus property Set() method, see D-Bus standard.
942
1356
value = dbus.ByteArray(b''.join(chr(byte)
943
1357
for byte in value))
944
1358
prop(value)
945
1359
946
1360
@dbus.service.method(dbus.PROPERTIES_IFACE,
947
1361
in_signature="s",
948
1362
out_signature="a{sv}")
949
1363
def GetAll(self, interface_name):
950
1364
"""Standard D-Bus property GetAll() method, see D-Bus
951
1365
standard.
952
1366
953
1367
Note: Will not include properties with access="write".
954
1368
"""
955
1369
properties = {}
966
1380
properties[name] = value
967
1381
continue
968
1382
properties[name] = type(value)(
969
value, variant_level = value.variant_level + 1)
1383
value, variant_level=value.variant_level + 1)
970
1384
return dbus.Dictionary(properties, signature="sv")
971
1385
972
1386
@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
973
1387
def PropertiesChanged(self, interface_name, changed_properties,
974
1388
invalidated_properties):
976
1390
standard.
977
1391
"""
978
1392
pass
979
1393
980
1394
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
981
1395
out_signature="s",
982
1396
path_keyword='object_path',
983
1397
connection_keyword='connection')
984
1398
def Introspect(self, object_path, connection):
985
1399
"""Overloading of standard D-Bus method.
986
1400
987
1401
Inserts property tags and interface annotation tags.
988
1402
"""
989
xmlstring = dbus.service.Object.Introspect(self, object_path,
990
connection)
1403
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1404
object_path,
1405
connection)
991
1406
try:
992
1407
document = xml.dom.minidom.parseString(xmlstring)
993
1408
994
1409
def make_tag(document, name, prop):
995
1410
e = document.createElement("property")
996
1411
e.setAttribute("name", name)
997
1412
e.setAttribute("type", prop._dbus_signature)
998
1413
e.setAttribute("access", prop._dbus_access)
999
1414
return e
1000
1415
1001
1416
for if_tag in document.getElementsByTagName("interface"):
1002
1417
# Add property tags
1003
1418
for tag in (make_tag(document, name, prop)
1006
1421
if prop._dbus_interface
1007
1422
== if_tag.getAttribute("name")):
1008
1423
if_tag.appendChild(tag)
1009
# Add annotation tags
1010
for typ in ("method", "signal", "property"):
1011
for tag in if_tag.getElementsByTagName(typ):
1012
annots = dict()
1013
for name, prop in (self.
1014
_get_all_dbus_things(typ)):
1015
if (name == tag.getAttribute("name")
1016
and prop._dbus_interface
1017
== if_tag.getAttribute("name")):
1018
annots.update(getattr(
1019
prop, "_dbus_annotations", {}))
1020
for name, value in annots.items():
1021
ann_tag = document.createElement(
1022
"annotation")
1023
ann_tag.setAttribute("name", name)
1024
ann_tag.setAttribute("value", value)
1025
tag.appendChild(ann_tag)
1026
# Add interface annotation tags
1027
for annotation, value in dict(
1028
itertools.chain.from_iterable(
1029
annotations().items()
1030
for name, annotations
1031
in self._get_all_dbus_things("interface")
1032
if name == if_tag.getAttribute("name")
1033
)).items():
1034
ann_tag = document.createElement("annotation")
1035
ann_tag.setAttribute("name", annotation)
1036
ann_tag.setAttribute("value", value)
1037
if_tag.appendChild(ann_tag)
1424
# Add annotation tags for properties
1425
for tag in if_tag.getElementsByTagName("property"):
1426
annots = dict()
1427
for name, prop in self._get_all_dbus_things(
1428
"property"):
1429
if (name == tag.getAttribute("name")
1430
and prop._dbus_interface
1431
== if_tag.getAttribute("name")):
1432
annots.update(getattr(
1433
prop, "_dbus_annotations", {}))
1434
for name, value in annots.items():
1435
ann_tag = document.createElement(
1436
"annotation")
1437
ann_tag.setAttribute("name", name)
1438
ann_tag.setAttribute("value", value)
1439
tag.appendChild(ann_tag)
1038
1440
# Add the names to the return values for the
1039
1441
# "org.freedesktop.DBus.Properties" methods
1040
1442
if (if_tag.getAttribute("name")
1059
1461
return xmlstring
1060
1462
1061
1463
1464
try:
1465
dbus.OBJECT_MANAGER_IFACE
1466
except AttributeError:
1467
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1468
1469
1470
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1471
"""A D-Bus object with an ObjectManager.
1472
1473
Classes inheriting from this exposes the standard
1474
GetManagedObjects call and the InterfacesAdded and
1475
InterfacesRemoved signals on the standard
1476
"org.freedesktop.DBus.ObjectManager" interface.
1477
1478
Note: No signals are sent automatically; they must be sent
1479
manually.
1480
"""
1481
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1482
out_signature="a{oa{sa{sv}}}")
1483
def GetManagedObjects(self):
1484
"""This function must be overridden"""
1485
raise NotImplementedError()
1486
1487
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1488
signature="oa{sa{sv}}")
1489
def InterfacesAdded(self, object_path, interfaces_and_properties):
1490
pass
1491
1492
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1493
def InterfacesRemoved(self, object_path, interfaces):
1494
pass
1495
1496
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1497
out_signature="s",
1498
path_keyword='object_path',
1499
connection_keyword='connection')
1500
def Introspect(self, object_path, connection):
1501
"""Overloading of standard D-Bus method.
1502
1503
Override return argument name of GetManagedObjects to be
1504
"objpath_interfaces_and_properties"
1505
"""
1506
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1507
object_path,
1508
connection)
1509
try:
1510
document = xml.dom.minidom.parseString(xmlstring)
1511
1512
for if_tag in document.getElementsByTagName("interface"):
1513
# Fix argument name for the GetManagedObjects method
1514
if (if_tag.getAttribute("name")
1515
== dbus.OBJECT_MANAGER_IFACE):
1516
for cn in if_tag.getElementsByTagName("method"):
1517
if (cn.getAttribute("name")
1518
== "GetManagedObjects"):
1519
for arg in cn.getElementsByTagName("arg"):
1520
if (arg.getAttribute("direction")
1521
== "out"):
1522
arg.setAttribute(
1523
"name",
1524
"objpath_interfaces"
1525
"_and_properties")
1526
xmlstring = document.toxml("utf-8")
1527
document.unlink()
1528
except (AttributeError, xml.dom.DOMException,
1529
xml.parsers.expat.ExpatError) as error:
1530
logger.error("Failed to override Introspection method",
1531
exc_info=error)
1532
return xmlstring
1533
1534
1062
1535
def datetime_to_dbus(dt, variant_level=0):
1063
1536
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1064
1537
if dt is None:
1065
return dbus.String("", variant_level = variant_level)
1538
return dbus.String("", variant_level=variant_level)
1066
1539
return dbus.String(dt.isoformat(), variant_level=variant_level)
1067
1540
1068
1541
1071
1544
dbus.service.Object, it will add alternate D-Bus attributes with
1072
1545
interface names according to the "alt_interface_names" mapping.
1073
1546
Usage:
1074
1547
1075
1548
@alternate_dbus_interfaces({"org.example.Interface":
1076
1549
"net.example.AlternateInterface"})
1077
1550
class SampleDBusObject(dbus.service.Object):
1078
1551
@dbus.service.method("org.example.Interface")
1079
1552
def SampleDBusMethod():
1080
1553
pass
1081
1554
1082
1555
The above "SampleDBusMethod" on "SampleDBusObject" will be
1083
1556
reachable via two interfaces: "org.example.Interface" and
1084
1557
"net.example.AlternateInterface", the latter of which will have
1085
1558
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1086
1559
"true", unless "deprecate" is passed with a False value.
1087
1560
1088
1561
This works for methods and signals, and also for D-Bus properties
1089
1562
(from DBusObjectWithProperties) and interfaces (from the
1090
1563
dbus_interface_annotations decorator).
1091
1564
"""
1092
1565
1093
1566
def wrapper(cls):
1094
1567
for orig_interface_name, alt_interface_name in (
1095
1568
alt_interface_names.items()):
1110
1583
interface_names.add(alt_interface)
1111
1584
# Is this a D-Bus signal?
1112
1585
if getattr(attribute, "_dbus_is_signal", False):
1586
# Extract the original non-method undecorated
1587
# function by black magic
1113
1588
if sys.version_info.major == 2:
1114
# Extract the original non-method undecorated
1115
# function by black magic
1116
1589
nonmethod_func = (dict(
1117
1590
zip(attribute.func_code.co_freevars,
1118
1591
attribute.__closure__))
1119
1592
["func"].cell_contents)
1120
1593
else:
1121
nonmethod_func = attribute
1594
nonmethod_func = (dict(
1595
zip(attribute.__code__.co_freevars,
1596
attribute.__closure__))
1597
["func"].cell_contents)
1122
1598
# Create a new, but exactly alike, function
1123
1599
# object, and decorate it to be a new D-Bus signal
1124
1600
# with the alternate D-Bus interface name
1125
if sys.version_info.major == 2:
1126
new_function = types.FunctionType(
1127
nonmethod_func.func_code,
1128
nonmethod_func.func_globals,
1129
nonmethod_func.func_name,
1130
nonmethod_func.func_defaults,
1131
nonmethod_func.func_closure)
1132
else:
1133
new_function = types.FunctionType(
1134
nonmethod_func.__code__,
1135
nonmethod_func.__globals__,
1136
nonmethod_func.__name__,
1137
nonmethod_func.__defaults__,
1138
nonmethod_func.__closure__)
1601
new_function = copy_function(nonmethod_func)
1139
1602
new_function = (dbus.service.signal(
1140
1603
alt_interface,
1141
1604
attribute._dbus_signature)(new_function))
1145
1608
attribute._dbus_annotations)
1146
1609
except AttributeError:
1147
1610
pass
1611
1148
1612
# Define a creator of a function to call both the
1149
1613
# original and alternate functions, so both the
1150
1614
# original and alternate signals gets sent when
1153
1617
"""This function is a scope container to pass
1154
1618
func1 and func2 to the "call_both" function
1155
1619
outside of its arguments"""
1156
1620
1621
@functools.wraps(func2)
1157
1622
def call_both(*args, **kwargs):
1158
1623
"""This function will emit two D-Bus
1159
1624
signals by calling func1 and func2"""
1160
1625
func1(*args, **kwargs)
1161
1626
func2(*args, **kwargs)
1162
1627
# Make wrapper function look like a D-Bus
1628
# signal
1629
for name, attr in inspect.getmembers(func2):
1630
if name.startswith("_dbus_"):
1631
setattr(call_both, name, attr)
1632
1163
1633
return call_both
1164
1634
# Create the "call_both" function and add it to
1165
1635
# the class
1175
1645
alt_interface,
1176
1646
attribute._dbus_in_signature,
1177
1647
attribute._dbus_out_signature)
1178
(types.FunctionType(attribute.func_code,
1179
attribute.func_globals,
1180
attribute.func_name,
1181
attribute.func_defaults,
1182
attribute.func_closure)))
1648
(copy_function(attribute)))
1183
1649
# Copy annotations, if any
1184
1650
try:
1185
1651
attr[attrname]._dbus_annotations = dict(
1197
1663
attribute._dbus_access,
1198
1664
attribute._dbus_get_args_options
1199
1665
["byte_arrays"])
1200
(types.FunctionType(
1201
attribute.func_code,
1202
attribute.func_globals,
1203
attribute.func_name,
1204
attribute.func_defaults,
1205
attribute.func_closure)))
1666
(copy_function(attribute)))
1206
1667
# Copy annotations, if any
1207
1668
try:
1208
1669
attr[attrname]._dbus_annotations = dict(
1217
1678
# to the class.
1218
1679
attr[attrname] = (
1219
1680
dbus_interface_annotations(alt_interface)
1220
(types.FunctionType(attribute.func_code,
1221
attribute.func_globals,
1222
attribute.func_name,
1223
attribute.func_defaults,
1224
attribute.func_closure)))
1681
(copy_function(attribute)))
1225
1682
if deprecate:
1226
1683
# Deprecate all alternate interfaces
1227
iname="_AlternateDBusNames_interface_annotation{}"
1684
iname = "_AlternateDBusNames_interface_annotation{}"
1228
1685
for interface_name in interface_names:
1229
1686
1230
1687
@dbus_interface_annotations(interface_name)
1231
1688
def func(self):
1232
return { "org.freedesktop.DBus.Deprecated":
1233
"true" }
1689
return {"org.freedesktop.DBus.Deprecated":
1690
"true"}
1234
1691
# Find an unused name
1235
1692
for aname in (iname.format(i)
1236
1693
for i in itertools.count()):
1240
1697
if interface_names:
1241
1698
# Replace the class with a new subclass of it with
1242
1699
# methods, signals, etc. as created above.
1243
cls = type(b"{}Alternate".format(cls.__name__),
1244
(cls, ), attr)
1700
if sys.version_info.major == 2:
1701
cls = type(b"{}Alternate".format(cls.__name__),
1702
(cls, ), attr)
1703
else:
1704
cls = type("{}Alternate".format(cls.__name__),
1705
(cls, ), attr)
1245
1706
return cls
1246
1707
1247
1708
return wrapper
1248
1709
1249
1710
1251
1712
"se.bsnet.fukt.Mandos"})
1252
1713
class ClientDBus(Client, DBusObjectWithProperties):
1253
1714
"""A Client class using D-Bus
1254
1715
1255
1716
Attributes:
1256
1717
dbus_object_path: dbus.ObjectPath
1257
1718
bus: dbus.SystemBus()
1258
1719
"""
1259
1720
1260
1721
runtime_expansions = (Client.runtime_expansions
1261
1722
+ ("dbus_object_path", ))
1262
1723
1263
1724
_interface = "se.recompile.Mandos.Client"
1264
1725
1265
1726
# dbus.service.Object doesn't use super(), so we can't either.
1266
1267
def __init__(self, bus = None, *args, **kwargs):
1727
1728
def __init__(self, bus=None, *args, **kwargs):
1268
1729
self.bus = bus
1269
1730
Client.__init__(self, *args, **kwargs)
1270
1731
# Only now, when this client is initialized, can it show up on
1276
1737
"/clients/" + client_object_name)
1277
1738
DBusObjectWithProperties.__init__(self, self.bus,
1278
1739
self.dbus_object_path)
1279
1740
1280
1741
def notifychangeproperty(transform_func, dbus_name,
1281
1742
type_func=lambda x: x,
1282
1743
variant_level=1,
1284
1745
_interface=_interface):
1285
1746
""" Modify a variable so that it's a property which announces
1286
1747
its changes to DBus.
1287
1748
1288
1749
transform_fun: Function that takes a value and a variant_level
1289
1750
and transforms it to a D-Bus type.
1290
1751
dbus_name: D-Bus name of the variable
1293
1754
variant_level: D-Bus variant level. Default: 1
1294
1755
"""
1295
1756
attrname = "_{}".format(dbus_name)
1296
1757
1297
1758
def setter(self, value):
1298
1759
if hasattr(self, "dbus_object_path"):
1299
1760
if (not hasattr(self, attrname) or
1306
1767
else:
1307
1768
dbus_value = transform_func(
1308
1769
type_func(value),
1309
variant_level = variant_level)
1770
variant_level=variant_level)
1310
1771
self.PropertyChanged(dbus.String(dbus_name),
1311
1772
dbus_value)
1312
1773
self.PropertiesChanged(
1313
1774
_interface,
1314
dbus.Dictionary({ dbus.String(dbus_name):
1315
dbus_value }),
1775
dbus.Dictionary({dbus.String(dbus_name):
1776
dbus_value}),
1316
1777
dbus.Array())
1317
1778
setattr(self, attrname, value)
1318
1779
1319
1780
return property(lambda self: getattr(self, attrname), setter)
1320
1781
1321
1782
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1322
1783
approvals_pending = notifychangeproperty(dbus.Boolean,
1323
1784
"ApprovalPending",
1324
type_func = bool)
1785
type_func=bool)
1325
1786
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1326
1787
last_enabled = notifychangeproperty(datetime_to_dbus,
1327
1788
"LastEnabled")
1328
1789
checker = notifychangeproperty(
1329
1790
dbus.Boolean, "CheckerRunning",
1330
type_func = lambda checker: checker is not None)
1791
type_func=lambda checker: checker is not None)
1331
1792
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1332
1793
"LastCheckedOK")
1333
1794
last_checker_status = notifychangeproperty(dbus.Int16,
1338
1799
"ApprovedByDefault")
1339
1800
approval_delay = notifychangeproperty(
1340
1801
dbus.UInt64, "ApprovalDelay",
1341
type_func = lambda td: td.total_seconds() * 1000)
1802
type_func=lambda td: td.total_seconds() * 1000)
1342
1803
approval_duration = notifychangeproperty(
1343
1804
dbus.UInt64, "ApprovalDuration",
1344
type_func = lambda td: td.total_seconds() * 1000)
1805
type_func=lambda td: td.total_seconds() * 1000)
1345
1806
host = notifychangeproperty(dbus.String, "Host")
1346
1807
timeout = notifychangeproperty(
1347
1808
dbus.UInt64, "Timeout",
1348
type_func = lambda td: td.total_seconds() * 1000)
1809
type_func=lambda td: td.total_seconds() * 1000)
1349
1810
extended_timeout = notifychangeproperty(
1350
1811
dbus.UInt64, "ExtendedTimeout",
1351
type_func = lambda td: td.total_seconds() * 1000)
1812
type_func=lambda td: td.total_seconds() * 1000)
1352
1813
interval = notifychangeproperty(
1353
1814
dbus.UInt64, "Interval",
1354
type_func = lambda td: td.total_seconds() * 1000)
1815
type_func=lambda td: td.total_seconds() * 1000)
1355
1816
checker_command = notifychangeproperty(dbus.String, "Checker")
1356
1817
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1357
1818
invalidate_only=True)
1358
1819
1359
1820
del notifychangeproperty
1360
1821
1361
1822
def __del__(self, *args, **kwargs):
1362
1823
try:
1363
1824
self.remove_from_connection()
1366
1827
if hasattr(DBusObjectWithProperties, "__del__"):
1367
1828
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1368
1829
Client.__del__(self, *args, **kwargs)
1369
1830
1370
1831
def checker_callback(self, source, condition,
1371
1832
connection, command, *args, **kwargs):
1372
1833
ret = Client.checker_callback(self, source, condition,
1388
1849
| self.last_checker_signal),
1389
1850
dbus.String(command))
1390
1851
return ret
1391
1852
1392
1853
def start_checker(self, *args, **kwargs):
1393
1854
old_checker_pid = getattr(self.checker, "pid", None)
1394
1855
r = Client.start_checker(self, *args, **kwargs)
1398
1859
# Emit D-Bus signal
1399
1860
self.CheckerStarted(self.current_checker_command)
1400
1861
return r
1401
1862
1402
1863
def _reset_approved(self):
1403
1864
self.approved = None
1404
1865
return False
1405
1866
1406
1867
def approve(self, value=True):
1407
1868
self.approved = value
1408
gobject.timeout_add(int(self.approval_duration.total_seconds()
1409
* 1000), self._reset_approved)
1869
GLib.timeout_add(int(self.approval_duration.total_seconds()
1870
* 1000), self._reset_approved)
1410
1871
self.send_changedstate()
1411
1412
## D-Bus methods, signals & properties
1413
1414
## Interfaces
1415
1416
## Signals
1417
1872
1873
# D-Bus methods, signals & properties
1874
1875
# Interfaces
1876
1877
# Signals
1878
1418
1879
# CheckerCompleted - signal
1419
1880
@dbus.service.signal(_interface, signature="nxs")
1420
1881
def CheckerCompleted(self, exitcode, waitstatus, command):
1421
1882
"D-Bus signal"
1422
1883
pass
1423
1884
1424
1885
# CheckerStarted - signal
1425
1886
@dbus.service.signal(_interface, signature="s")
1426
1887
def CheckerStarted(self, command):
1427
1888
"D-Bus signal"
1428
1889
pass
1429
1890
1430
1891
# PropertyChanged - signal
1431
1892
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1432
1893
@dbus.service.signal(_interface, signature="sv")
1433
1894
def PropertyChanged(self, property, value):
1434
1895
"D-Bus signal"
1435
1896
pass
1436
1897
1437
1898
# GotSecret - signal
1438
1899
@dbus.service.signal(_interface)
1439
1900
def GotSecret(self):
1442
1903
server to mandos-client
1443
1904
"""
1444
1905
pass
1445
1906
1446
1907
# Rejected - signal
1447
1908
@dbus.service.signal(_interface, signature="s")
1448
1909
def Rejected(self, reason):
1449
1910
"D-Bus signal"
1450
1911
pass
1451
1912
1452
1913
# NeedApproval - signal
1453
1914
@dbus.service.signal(_interface, signature="tb")
1454
1915
def NeedApproval(self, timeout, default):
1455
1916
"D-Bus signal"
1456
1917
return self.need_approval()
1457
1458
## Methods
1459
1918
1919
# Methods
1920
1460
1921
# Approve - method
1461
1922
@dbus.service.method(_interface, in_signature="b")
1462
1923
def Approve(self, value):
1463
1924
self.approve(value)
1464
1925
1465
1926
# CheckedOK - method
1466
1927
@dbus.service.method(_interface)
1467
1928
def CheckedOK(self):
1468
1929
self.checked_ok()
1469
1930
1470
1931
# Enable - method
1471
1932
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1472
1933
@dbus.service.method(_interface)
1473
1934
def Enable(self):
1474
1935
"D-Bus method"
1475
1936
self.enable()
1476
1937
1477
1938
# StartChecker - method
1478
1939
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1479
1940
@dbus.service.method(_interface)
1480
1941
def StartChecker(self):
1481
1942
"D-Bus method"
1482
1943
self.start_checker()
1483
1944
1484
1945
# Disable - method
1485
1946
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1486
1947
@dbus.service.method(_interface)
1487
1948
def Disable(self):
1488
1949
"D-Bus method"
1489
1950
self.disable()
1490
1951
1491
1952
# StopChecker - method
1492
1953
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1493
1954
@dbus.service.method(_interface)
1494
1955
def StopChecker(self):
1495
1956
self.stop_checker()
1496
1497
## Properties
1498
1957
1958
# Properties
1959
1499
1960
# ApprovalPending - property
1500
1961
@dbus_service_property(_interface, signature="b", access="read")
1501
1962
def ApprovalPending_dbus_property(self):
1502
1963
return dbus.Boolean(bool(self.approvals_pending))
1503
1964
1504
1965
# ApprovedByDefault - property
1505
1966
@dbus_service_property(_interface,
1506
1967
signature="b",
1509
1970
if value is None: # get
1510
1971
return dbus.Boolean(self.approved_by_default)
1511
1972
self.approved_by_default = bool(value)
1512
1973
1513
1974
# ApprovalDelay - property
1514
1975
@dbus_service_property(_interface,
1515
1976
signature="t",
1519
1980
return dbus.UInt64(self.approval_delay.total_seconds()
1520
1981
* 1000)
1521
1982
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1522
1983
1523
1984
# ApprovalDuration - property
1524
1985
@dbus_service_property(_interface,
1525
1986
signature="t",
1529
1990
return dbus.UInt64(self.approval_duration.total_seconds()
1530
1991
* 1000)
1531
1992
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1532
1993
1533
1994
# Name - property
1534
1995
@dbus_annotations(
1535
1996
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1536
1997
@dbus_service_property(_interface, signature="s", access="read")
1537
1998
def Name_dbus_property(self):
1538
1999
return dbus.String(self.name)
1539
2000
1540
2001
# Fingerprint - property
1541
2002
@dbus_annotations(
1542
2003
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1543
2004
@dbus_service_property(_interface, signature="s", access="read")
1544
2005
def Fingerprint_dbus_property(self):
1545
2006
return dbus.String(self.fingerprint)
1546
2007
1547
2008
# Host - property
1548
2009
@dbus_service_property(_interface,
1549
2010
signature="s",
1552
2013
if value is None: # get
1553
2014
return dbus.String(self.host)
1554
2015
self.host = str(value)
1555
2016
1556
2017
# Created - property
1557
2018
@dbus_annotations(
1558
2019
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1559
2020
@dbus_service_property(_interface, signature="s", access="read")
1560
2021
def Created_dbus_property(self):
1561
2022
return datetime_to_dbus(self.created)
1562
2023
1563
2024
# LastEnabled - property
1564
2025
@dbus_service_property(_interface, signature="s", access="read")
1565
2026
def LastEnabled_dbus_property(self):
1566
2027
return datetime_to_dbus(self.last_enabled)
1567
2028
1568
2029
# Enabled - property
1569
2030
@dbus_service_property(_interface,
1570
2031
signature="b",
1576
2037
self.enable()
1577
2038
else:
1578
2039
self.disable()
1579
2040
1580
2041
# LastCheckedOK - property
1581
2042
@dbus_service_property(_interface,
1582
2043
signature="s",
1586
2047
self.checked_ok()
1587
2048
return
1588
2049
return datetime_to_dbus(self.last_checked_ok)
1589
2050
1590
2051
# LastCheckerStatus - property
1591
2052
@dbus_service_property(_interface, signature="n", access="read")
1592
2053
def LastCheckerStatus_dbus_property(self):
1593
2054
return dbus.Int16(self.last_checker_status)
1594
2055
1595
2056
# Expires - property
1596
2057
@dbus_service_property(_interface, signature="s", access="read")
1597
2058
def Expires_dbus_property(self):
1598
2059
return datetime_to_dbus(self.expires)
1599
2060
1600
2061
# LastApprovalRequest - property
1601
2062
@dbus_service_property(_interface, signature="s", access="read")
1602
2063
def LastApprovalRequest_dbus_property(self):
1603
2064
return datetime_to_dbus(self.last_approval_request)
1604
2065
1605
2066
# Timeout - property
1606
2067
@dbus_service_property(_interface,
1607
2068
signature="t",
1622
2083
if (getattr(self, "disable_initiator_tag", None)
1623
2084
is None):
1624
2085
return
1625
gobject.source_remove(self.disable_initiator_tag)
1626
self.disable_initiator_tag = gobject.timeout_add(
2086
GLib.source_remove(self.disable_initiator_tag)
2087
self.disable_initiator_tag = GLib.timeout_add(
1627
2088
int((self.expires - now).total_seconds() * 1000),
1628
2089
self.disable)
1629
2090
1630
2091
# ExtendedTimeout - property
1631
2092
@dbus_service_property(_interface,
1632
2093
signature="t",
1636
2097
return dbus.UInt64(self.extended_timeout.total_seconds()
1637
2098
* 1000)
1638
2099
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1639
2100
1640
2101
# Interval - property
1641
2102
@dbus_service_property(_interface,
1642
2103
signature="t",
1649
2110
return
1650
2111
if self.enabled:
1651
2112
# Reschedule checker run
1652
gobject.source_remove(self.checker_initiator_tag)
1653
self.checker_initiator_tag = gobject.timeout_add(
2113
GLib.source_remove(self.checker_initiator_tag)
2114
self.checker_initiator_tag = GLib.timeout_add(
1654
2115
value, self.start_checker)
1655
self.start_checker() # Start one now, too
1656
2116
self.start_checker() # Start one now, too
2117
1657
2118
# Checker - property
1658
2119
@dbus_service_property(_interface,
1659
2120
signature="s",
1662
2123
if value is None: # get
1663
2124
return dbus.String(self.checker_command)
1664
2125
self.checker_command = str(value)
1665
2126
1666
2127
# CheckerRunning - property
1667
2128
@dbus_service_property(_interface,
1668
2129
signature="b",
1674
2135
self.start_checker()
1675
2136
else:
1676
2137
self.stop_checker()
1677
2138
1678
2139
# ObjectPath - property
1679
2140
@dbus_annotations(
1680
2141
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
1681
2142
"org.freedesktop.DBus.Deprecated": "true"})
1682
2143
@dbus_service_property(_interface, signature="o", access="read")
1683
2144
def ObjectPath_dbus_property(self):
1684
return self.dbus_object_path # is already a dbus.ObjectPath
1685
2145
return self.dbus_object_path # is already a dbus.ObjectPath
2146
1686
2147
# Secret = property
1687
2148
@dbus_annotations(
1688
2149
{"org.freedesktop.DBus.Property.EmitsChangedSignal":
1693
2154
byte_arrays=True)
1694
2155
def Secret_dbus_property(self, value):
1695
2156
self.secret = bytes(value)
1696
2157
1697
2158
del _interface
1698
2159
1699
2160
1703
2164
self._pipe.send(('init', fpr, address))
1704
2165
if not self._pipe.recv():
1705
2166
raise KeyError(fpr)
1706
2167
1707
2168
def __getattribute__(self, name):
1708
2169
if name == '_pipe':
1709
2170
return super(ProxyClient, self).__getattribute__(name)
1712
2173
if data[0] == 'data':
1713
2174
return data[1]
1714
2175
if data[0] == 'function':
1715
2176
1716
2177
def func(*args, **kwargs):
1717
2178
self._pipe.send(('funcall', name, args, kwargs))
1718
2179
return self._pipe.recv()[1]
1719
2180
1720
2181
return func
1721
2182
1722
2183
def __setattr__(self, name, value):
1723
2184
if name == '_pipe':
1724
2185
return super(ProxyClient, self).__setattr__(name, value)
1727
2188
1728
2189
class ClientHandler(socketserver.BaseRequestHandler, object):
1729
2190
"""A class to handle client connections.
1730
2191
1731
2192
Instantiated once for each connection to handle it.
1732
2193
Note: This will run in its own forked process."""
1733
2194
1734
2195
def handle(self):
1735
2196
with contextlib.closing(self.server.child_pipe) as child_pipe:
1736
2197
logger.info("TCP connection from: %s",
1737
2198
str(self.client_address))
1738
2199
logger.debug("Pipe FD: %d",
1739
2200
self.server.child_pipe.fileno())
1740
1741
session = gnutls.connection.ClientSession(
1742
self.request, gnutls.connection .X509Credentials())
1743
1744
# Note: gnutls.connection.X509Credentials is really a
1745
# generic GnuTLS certificate credentials object so long as
1746
# no X.509 keys are added to it. Therefore, we can use it
1747
# here despite using OpenPGP certificates.
1748
1749
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1750
# "+AES-256-CBC", "+SHA1",
1751
# "+COMP-NULL", "+CTYPE-OPENPGP",
1752
# "+DHE-DSS"))
2201
2202
session = gnutls.ClientSession(self.request)
2203
2204
# priority = ':'.join(("NONE", "+VERS-TLS1.1",
2205
# "+AES-256-CBC", "+SHA1",
2206
# "+COMP-NULL", "+CTYPE-OPENPGP",
2207
# "+DHE-DSS"))
1753
2208
# Use a fallback default, since this MUST be set.
1754
2209
priority = self.server.gnutls_priority
1755
2210
if priority is None:
1756
2211
priority = "NORMAL"
1757
gnutls.library.functions.gnutls_priority_set_direct(
1758
session._c_object, priority, None)
1759
2212
gnutls.priority_set_direct(session._c_object,
2213
priority.encode("utf-8"),
2214
None)
2215
1760
2216
# Start communication using the Mandos protocol
1761
2217
# Get protocol number
1762
2218
line = self.request.makefile().readline()
1767
2223
except (ValueError, IndexError, RuntimeError) as error:
1768
2224
logger.error("Unknown protocol version: %s", error)
1769
2225
return
1770
2226
1771
2227
# Start GnuTLS connection
1772
2228
try:
1773
2229
session.handshake()
1774
except gnutls.errors.GNUTLSError as error:
2230
except gnutls.Error as error:
1775
2231
logger.warning("Handshake failed: %s", error)
1776
2232
# Do not run session.bye() here: the session is not
1777
2233
# established. Just abandon the request.
1778
2234
return
1779
2235
logger.debug("Handshake succeeded")
1780
2236
1781
2237
approval_required = False
1782
2238
try:
1783
2239
try:
1784
2240
fpr = self.fingerprint(
1785
2241
self.peer_certificate(session))
1786
except (TypeError,
1787
gnutls.errors.GNUTLSError) as error:
2242
except (TypeError, gnutls.Error) as error:
1788
2243
logger.warning("Bad certificate: %s", error)
1789
2244
return
1790
2245
logger.debug("Fingerprint: %s", fpr)
1791
2246
1792
2247
try:
1793
2248
client = ProxyClient(child_pipe, fpr,
1794
2249
self.client_address)
1795
2250
except KeyError:
1796
2251
return
1797
2252
1798
2253
if client.approval_delay:
1799
2254
delay = client.approval_delay
1800
2255
client.approvals_pending += 1
1801
2256
approval_required = True
1802
2257
1803
2258
while True:
1804
2259
if not client.enabled:
1805
2260
logger.info("Client %s is disabled",
1808
2263
# Emit D-Bus signal
1809
2264
client.Rejected("Disabled")
1810
2265
return
1811
2266
1812
2267
if client.approved or not client.approval_delay:
1813
#We are approved or approval is disabled
2268
# We are approved or approval is disabled
1814
2269
break
1815
2270
elif client.approved is None:
1816
2271
logger.info("Client %s needs approval",
1827
2282
# Emit D-Bus signal
1828
2283
client.Rejected("Denied")
1829
2284
return
1830
1831
#wait until timeout or approved
2285
2286
# wait until timeout or approved
1832
2287
time = datetime.datetime.now()
1833
2288
client.changedstate.acquire()
1834
2289
client.changedstate.wait(delay.total_seconds())
1847
2302
break
1848
2303
else:
1849
2304
delay -= time2 - time
1850
1851
sent_size = 0
1852
while sent_size < len(client.secret):
1853
try:
1854
sent = session.send(client.secret[sent_size:])
1855
except gnutls.errors.GNUTLSError as error:
1856
logger.warning("gnutls send failed",
1857
exc_info=error)
1858
return
1859
logger.debug("Sent: %d, remaining: %d", sent,
1860
len(client.secret) - (sent_size
1861
+ sent))
1862
sent_size += sent
1863
2305
2306
try:
2307
session.send(client.secret)
2308
except gnutls.Error as error:
2309
logger.warning("gnutls send failed",
2310
exc_info=error)
2311
return
2312
1864
2313
logger.info("Sending secret to %s", client.name)
1865
2314
# bump the timeout using extended_timeout
1866
2315
client.bump_timeout(client.extended_timeout)
1867
2316
if self.server.use_dbus:
1868
2317
# Emit D-Bus signal
1869
2318
client.GotSecret()
1870
2319
1871
2320
finally:
1872
2321
if approval_required:
1873
2322
client.approvals_pending -= 1
1874
2323
try:
1875
2324
session.bye()
1876
except gnutls.errors.GNUTLSError as error:
2325
except gnutls.Error as error:
1877
2326
logger.warning("GnuTLS bye failed",
1878
2327
exc_info=error)
1879
2328
1880
2329
@staticmethod
1881
2330
def peer_certificate(session):
1882
2331
"Return the peer's OpenPGP certificate as a bytestring"
1883
2332
# If not an OpenPGP certificate...
1884
if (gnutls.library.functions.gnutls_certificate_type_get(
1885
session._c_object)
1886
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1887
# ...do the normal thing
1888
return session.peer_certificate
2333
if (gnutls.certificate_type_get(session._c_object)
2334
!= gnutls.CRT_OPENPGP):
2335
# ...return invalid data
2336
return b""
1889
2337
list_size = ctypes.c_uint(1)
1890
cert_list = (gnutls.library.functions
1891
.gnutls_certificate_get_peers
2338
cert_list = (gnutls.certificate_get_peers
1892
2339
(session._c_object, ctypes.byref(list_size)))
1893
2340
if not bool(cert_list) and list_size.value != 0:
1894
raise gnutls.errors.GNUTLSError("error getting peer"
1895
" certificate")
2341
raise gnutls.Error("error getting peer certificate")
1896
2342
if list_size.value == 0:
1897
2343
return None
1898
2344
cert = cert_list[0]
1899
2345
return ctypes.string_at(cert.data, cert.size)
1900
2346
1901
2347
@staticmethod
1902
2348
def fingerprint(openpgp):
1903
2349
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1904
2350
# New GnuTLS "datum" with the OpenPGP public key
1905
datum = gnutls.library.types.gnutls_datum_t(
2351
datum = gnutls.datum_t(
1906
2352
ctypes.cast(ctypes.c_char_p(openpgp),
1907
2353
ctypes.POINTER(ctypes.c_ubyte)),
1908
2354
ctypes.c_uint(len(openpgp)))
1909
2355
# New empty GnuTLS certificate
1910
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1911
gnutls.library.functions.gnutls_openpgp_crt_init(
1912
ctypes.byref(crt))
2356
crt = gnutls.openpgp_crt_t()
2357
gnutls.openpgp_crt_init(ctypes.byref(crt))
1913
2358
# Import the OpenPGP public key into the certificate
1914
gnutls.library.functions.gnutls_openpgp_crt_import(
1915
crt, ctypes.byref(datum),
1916
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
2359
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2360
gnutls.OPENPGP_FMT_RAW)
1917
2361
# Verify the self signature in the key
1918
2362
crtverify = ctypes.c_uint()
1919
gnutls.library.functions.gnutls_openpgp_crt_verify_self(
1920
crt, 0, ctypes.byref(crtverify))
2363
gnutls.openpgp_crt_verify_self(crt, 0,
2364
ctypes.byref(crtverify))
1921
2365
if crtverify.value != 0:
1922
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1923
raise gnutls.errors.CertificateSecurityError(
1924
"Verify failed")
2366
gnutls.openpgp_crt_deinit(crt)
2367
raise gnutls.CertificateSecurityError("Verify failed")
1925
2368
# New buffer for the fingerprint
1926
2369
buf = ctypes.create_string_buffer(20)
1927
2370
buf_len = ctypes.c_size_t()
1928
2371
# Get the fingerprint from the certificate into the buffer
1929
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint(
1930
crt, ctypes.byref(buf), ctypes.byref(buf_len))
2372
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2373
ctypes.byref(buf_len))
1931
2374
# Deinit the certificate
1932
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2375
gnutls.openpgp_crt_deinit(crt)
1933
2376
# Convert the buffer to a Python bytestring
1934
2377
fpr = ctypes.string_at(buf, buf_len.value)
1935
2378
# Convert the bytestring to hexadecimal notation
1939
2382
1940
2383
class MultiprocessingMixIn(object):
1941
2384
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1942
2385
1943
2386
def sub_process_main(self, request, address):
1944
2387
try:
1945
2388
self.finish_request(request, address)
1946
2389
except Exception:
1947
2390
self.handle_error(request, address)
1948
2391
self.close_request(request)
1949
2392
1950
2393
def process_request(self, request, address):
1951
2394
"""Start a new process to process the request."""
1952
proc = multiprocessing.Process(target = self.sub_process_main,
1953
args = (request, address))
2395
proc = multiprocessing.Process(target=self.sub_process_main,
2396
args=(request, address))
1954
2397
proc.start()
1955
2398
return proc
1956
2399
1957
2400
1958
2401
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1959
2402
""" adds a pipe to the MixIn """
1960
2403
1961
2404
def process_request(self, request, client_address):
1962
2405
"""Overrides and wraps the original process_request().
1963
2406
1964
2407
This function creates a new pipe in self.pipe
1965
2408
"""
1966
2409
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1967
2410
1968
2411
proc = MultiprocessingMixIn.process_request(self, request,
1969
2412
client_address)
1970
2413
self.child_pipe.close()
1971
2414
self.add_pipe(parent_pipe, proc)
1972
2415
1973
2416
def add_pipe(self, parent_pipe, proc):
1974
2417
"""Dummy function; override as necessary"""
1975
2418
raise NotImplementedError()
1978
2421
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1979
2422
socketserver.TCPServer, object):
1980
2423
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1981
2424
1982
2425
Attributes:
1983
2426
enabled: Boolean; whether this server is activated yet
1984
2427
interface: None or a network interface name (string)
1985
2428
use_ipv6: Boolean; to use IPv6 or not
1986
2429
"""
1987
2430
1988
2431
def __init__(self, server_address, RequestHandlerClass,
1989
2432
interface=None,
1990
2433
use_ipv6=True,
2000
2443
self.socketfd = socketfd
2001
2444
# Save the original socket.socket() function
2002
2445
self.socket_socket = socket.socket
2446
2003
2447
# To implement --socket, we monkey patch socket.socket.
2004
#
2448
#
2005
2449
# (When socketserver.TCPServer is a new-style class, we
2006
2450
# could make self.socket into a property instead of monkey
2007
2451
# patching socket.socket.)
2008
#
2452
#
2009
2453
# Create a one-time-only replacement for socket.socket()
2010
2454
@functools.wraps(socket.socket)
2011
2455
def socket_wrapper(*args, **kwargs):
2023
2467
# socket_wrapper(), if socketfd was set.
2024
2468
socketserver.TCPServer.__init__(self, server_address,
2025
2469
RequestHandlerClass)
2026
2470
2027
2471
def server_bind(self):
2028
2472
"""This overrides the normal server_bind() function
2029
2473
to bind to an interface if one was specified, and also NOT to
2030
2474
bind to an address or port if they were not specified."""
2475
global SO_BINDTODEVICE
2031
2476
if self.interface is not None:
2032
2477
if SO_BINDTODEVICE is None:
2033
logger.error("SO_BINDTODEVICE does not exist;"
2034
" cannot bind to interface %s",
2035
self.interface)
2036
else:
2037
try:
2038
self.socket.setsockopt(
2039
socket.SOL_SOCKET, SO_BINDTODEVICE,
2040
(self.interface + "\0").encode("utf-8"))
2041
except socket.error as error:
2042
if error.errno == errno.EPERM:
2043
logger.error("No permission to bind to"
2044
" interface %s", self.interface)
2045
elif error.errno == errno.ENOPROTOOPT:
2046
logger.error("SO_BINDTODEVICE not available;"
2047
" cannot bind to interface %s",
2048
self.interface)
2049
elif error.errno == errno.ENODEV:
2050
logger.error("Interface %s does not exist,"
2051
" cannot bind", self.interface)
2052
else:
2053
raise
2478
# Fall back to a hard-coded value which seems to be
2479
# common enough.
2480
logger.warning("SO_BINDTODEVICE not found, trying 25")
2481
SO_BINDTODEVICE = 25
2482
try:
2483
self.socket.setsockopt(
2484
socket.SOL_SOCKET, SO_BINDTODEVICE,
2485
(self.interface + "\0").encode("utf-8"))
2486
except socket.error as error:
2487
if error.errno == errno.EPERM:
2488
logger.error("No permission to bind to"
2489
" interface %s", self.interface)
2490
elif error.errno == errno.ENOPROTOOPT:
2491
logger.error("SO_BINDTODEVICE not available;"
2492
" cannot bind to interface %s",
2493
self.interface)
2494
elif error.errno == errno.ENODEV:
2495
logger.error("Interface %s does not exist,"
2496
" cannot bind", self.interface)
2497
else:
2498
raise
2054
2499
# Only bind(2) the socket if we really need to.
2055
2500
if self.server_address[0] or self.server_address[1]:
2056
2501
if not self.server_address[0]:
2057
2502
if self.address_family == socket.AF_INET6:
2058
any_address = "::" # in6addr_any
2503
any_address = "::" # in6addr_any
2059
2504
else:
2060
any_address = "0.0.0.0" # INADDR_ANY
2505
any_address = "0.0.0.0" # INADDR_ANY
2061
2506
self.server_address = (any_address,
2062
2507
self.server_address[1])
2063
2508
elif not self.server_address[1]:
2073
2518
2074
2519
class MandosServer(IPv6_TCPServer):
2075
2520
"""Mandos server.
2076
2521
2077
2522
Attributes:
2078
2523
clients: set of Client objects
2079
2524
gnutls_priority GnuTLS priority string
2080
2525
use_dbus: Boolean; to emit D-Bus signals or not
2081
2082
Assumes a gobject.MainLoop event loop.
2526
2527
Assumes a GLib.MainLoop event loop.
2083
2528
"""
2084
2529
2085
2530
def __init__(self, server_address, RequestHandlerClass,
2086
2531
interface=None,
2087
2532
use_ipv6=True,
2097
2542
self.gnutls_priority = gnutls_priority
2098
2543
IPv6_TCPServer.__init__(self, server_address,
2099
2544
RequestHandlerClass,
2100
interface = interface,
2101
use_ipv6 = use_ipv6,
2102
socketfd = socketfd)
2103
2545
interface=interface,
2546
use_ipv6=use_ipv6,
2547
socketfd=socketfd)
2548
2104
2549
def server_activate(self):
2105
2550
if self.enabled:
2106
2551
return socketserver.TCPServer.server_activate(self)
2107
2552
2108
2553
def enable(self):
2109
2554
self.enabled = True
2110
2555
2111
2556
def add_pipe(self, parent_pipe, proc):
2112
2557
# Call "handle_ipc" for both data and EOF events
2113
gobject.io_add_watch(
2558
GLib.io_add_watch(
2114
2559
parent_pipe.fileno(),
2115
gobject.IO_IN | gobject.IO_HUP,
2560
GLib.IO_IN | GLib.IO_HUP,
2116
2561
functools.partial(self.handle_ipc,
2117
parent_pipe = parent_pipe,
2118
proc = proc))
2119
2562
parent_pipe=parent_pipe,
2563
proc=proc))
2564
2120
2565
def handle_ipc(self, source, condition,
2121
2566
parent_pipe=None,
2122
proc = None,
2567
proc=None,
2123
2568
client_object=None):
2124
2569
# error, or the other end of multiprocessing.Pipe has closed
2125
if condition & (gobject.IO_ERR | gobject.IO_HUP):
2570
if condition & (GLib.IO_ERR | GLib.IO_HUP):
2126
2571
# Wait for other process to exit
2127
2572
proc.join()
2128
2573
return False
2129
2574
2130
2575
# Read a request from the child
2131
2576
request = parent_pipe.recv()
2132
2577
command = request[0]
2133
2578
2134
2579
if command == 'init':
2135
2580
fpr = request[1]
2136
2581
address = request[2]
2137
2138
for c in self.clients.itervalues():
2582
2583
for c in self.clients.values():
2139
2584
if c.fingerprint == fpr:
2140
2585
client = c
2141
2586
break
2148
2593
address[0])
2149
2594
parent_pipe.send(False)
2150
2595
return False
2151
2152
gobject.io_add_watch(
2596
2597
GLib.io_add_watch(
2153
2598
parent_pipe.fileno(),
2154
gobject.IO_IN | gobject.IO_HUP,
2599
GLib.IO_IN | GLib.IO_HUP,
2155
2600
functools.partial(self.handle_ipc,
2156
parent_pipe = parent_pipe,
2157
proc = proc,
2158
client_object = client))
2601
parent_pipe=parent_pipe,
2602
proc=proc,
2603
client_object=client))
2159
2604
parent_pipe.send(True)
2160
2605
# remove the old hook in favor of the new above hook on
2161
2606
# same fileno
2164
2609
funcname = request[1]
2165
2610
args = request[2]
2166
2611
kwargs = request[3]
2167
2612
2168
2613
parent_pipe.send(('data', getattr(client_object,
2169
2614
funcname)(*args,
2170
2615
**kwargs)))
2171
2616
2172
2617
if command == 'getattr':
2173
2618
attrname = request[1]
2174
2619
if isinstance(client_object.__getattribute__(attrname),
2177
2622
else:
2178
2623
parent_pipe.send((
2179
2624
'data', client_object.__getattribute__(attrname)))
2180
2625
2181
2626
if command == 'setattr':
2182
2627
attrname = request[1]
2183
2628
value = request[2]
2184
2629
setattr(client_object, attrname, value)
2185
2630
2186
2631
return True
2187
2632
2188
2633
2189
2634
def rfc3339_duration_to_delta(duration):
2190
2635
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2191
2636
2192
2637
>>> rfc3339_duration_to_delta("P7D")
2193
2638
datetime.timedelta(7)
2194
2639
>>> rfc3339_duration_to_delta("PT60S")
2204
2649
>>> rfc3339_duration_to_delta("P1DT3M20S")
2205
2650
datetime.timedelta(1, 200)
2206
2651
"""
2207
2652
2208
2653
# Parsing an RFC 3339 duration with regular expressions is not
2209
2654
# possible - there would have to be multiple places for the same
2210
2655
# values, like seconds. The current code, while more esoteric, is
2211
2656
# cleaner without depending on a parsing library. If Python had a
2212
2657
# built-in library for parsing we would use it, but we'd like to
2213
2658
# avoid excessive use of external libraries.
2214
2659
2215
2660
# New type for defining tokens, syntax, and semantics all-in-one
2216
2661
Token = collections.namedtuple("Token", (
2217
2662
"regexp", # To match token; if "value" is not None, must have
2250
2695
frozenset((token_year, token_month,
2251
2696
token_day, token_time,
2252
2697
token_week)))
2253
# Define starting values
2254
value = datetime.timedelta() # Value so far
2698
# Define starting values:
2699
# Value so far
2700
value = datetime.timedelta()
2255
2701
found_token = None
2256
followers = frozenset((token_duration, )) # Following valid tokens
2257
s = duration # String left to parse
2702
# Following valid tokens
2703
followers = frozenset((token_duration, ))
2704
# String left to parse
2705
s = duration
2258
2706
# Loop until end token is found
2259
2707
while found_token is not token_end:
2260
2708
# Search for any currently valid tokens
2284
2732
2285
2733
def string_to_delta(interval):
2286
2734
"""Parse a string and return a datetime.timedelta
2287
2735
2288
2736
>>> string_to_delta('7d')
2289
2737
datetime.timedelta(7)
2290
2738
>>> string_to_delta('60s')
2298
2746
>>> string_to_delta('5m 30s')
2299
2747
datetime.timedelta(0, 330)
2300
2748
"""
2301
2749
2302
2750
try:
2303
2751
return rfc3339_duration_to_delta(interval)
2304
2752
except ValueError:
2305
2753
pass
2306
2754
2307
2755
timevalue = datetime.timedelta(0)
2308
2756
for s in interval.split():
2309
2757
try:
2327
2775
return timevalue
2328
2776
2329
2777
2330
def daemon(nochdir = False, noclose = False):
2778
def daemon(nochdir=False, noclose=False):
2331
2779
"""See daemon(3). Standard BSD Unix function.
2332
2780
2333
2781
This should really exist as os.daemon, but it doesn't (yet)."""
2334
2782
if os.fork():
2335
2783
sys.exit()
2353
2801
2354
2802
2355
2803
def main():
2356
2804
2357
2805
##################################################################
2358
2806
# Parsing of options, both command line and config file
2359
2807
2360
2808
parser = argparse.ArgumentParser()
2361
2809
parser.add_argument("-v", "--version", action="version",
2362
version = "%(prog)s {}".format(version),
2810
version="%(prog)s {}".format(version),
2363
2811
help="show version number and exit")
2364
2812
parser.add_argument("-i", "--interface", metavar="IF",
2365
2813
help="Bind to interface IF")
2401
2849
parser.add_argument("--no-zeroconf", action="store_false",
2402
2850
dest="zeroconf", help="Do not use Zeroconf",
2403
2851
default=None)
2404
2852
2405
2853
options = parser.parse_args()
2406
2854
2407
2855
if options.check:
2408
2856
import doctest
2409
2857
fail_count, test_count = doctest.testmod()
2410
2858
sys.exit(os.EX_OK if fail_count == 0 else 1)
2411
2859
2412
2860
# Default values for config file for server-global settings
2413
server_defaults = { "interface": "",
2414
"address": "",
2415
"port": "",
2416
"debug": "False",
2417
"priority":
2418
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2419
":+SIGN-DSA-SHA256",
2420
"servicename": "Mandos",
2421
"use_dbus": "True",
2422
"use_ipv6": "True",
2423
"debuglevel": "",
2424
"restore": "True",
2425
"socket": "",
2426
"statedir": "/var/lib/mandos",
2427
"foreground": "False",
2428
"zeroconf": "True",
2429
}
2430
2861
server_defaults = {"interface": "",
2862
"address": "",
2863
"port": "",
2864
"debug": "False",
2865
"priority":
2866
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2867
":+SIGN-DSA-SHA256",
2868
"servicename": "Mandos",
2869
"use_dbus": "True",
2870
"use_ipv6": "True",
2871
"debuglevel": "",
2872
"restore": "True",
2873
"socket": "",
2874
"statedir": "/var/lib/mandos",
2875
"foreground": "False",
2876
"zeroconf": "True",
2877
}
2878
2431
2879
# Parse config file for server-global settings
2432
2880
server_config = configparser.SafeConfigParser(server_defaults)
2433
2881
del server_defaults
2451
2899
server_settings["socket"] = os.dup(server_settings
2452
2900
["socket"])
2453
2901
del server_config
2454
2902
2455
2903
# Override the settings from the config file with command line
2456
2904
# options, if set.
2457
2905
for option in ("interface", "address", "port", "debug",
2475
2923
if server_settings["debug"]:
2476
2924
server_settings["foreground"] = True
2477
2925
# Now we have our good server settings in "server_settings"
2478
2926
2479
2927
##################################################################
2480
2928
2481
2929
if (not server_settings["zeroconf"]
2482
2930
and not (server_settings["port"]
2483
2931
or server_settings["socket"] != "")):
2484
2932
parser.error("Needs port or socket to work without Zeroconf")
2485
2933
2486
2934
# For convenience
2487
2935
debug = server_settings["debug"]
2488
2936
debuglevel = server_settings["debuglevel"]
2492
2940
stored_state_file)
2493
2941
foreground = server_settings["foreground"]
2494
2942
zeroconf = server_settings["zeroconf"]
2495
2943
2496
2944
if debug:
2497
2945
initlogger(debug, logging.DEBUG)
2498
2946
else:
2501
2949
else:
2502
2950
level = getattr(logging, debuglevel.upper())
2503
2951
initlogger(debug, level)
2504
2952
2505
2953
if server_settings["servicename"] != "Mandos":
2506
2954
syslogger.setFormatter(
2507
2955
logging.Formatter('Mandos ({}) [%(process)d]:'
2508
2956
' %(levelname)s: %(message)s'.format(
2509
2957
server_settings["servicename"])))
2510
2958
2511
2959
# Parse config file with clients
2512
2960
client_config = configparser.SafeConfigParser(Client
2513
2961
.client_defaults)
2514
2962
client_config.read(os.path.join(server_settings["configdir"],
2515
2963
"clients.conf"))
2516
2964
2517
2965
global mandos_dbus_service
2518
2966
mandos_dbus_service = None
2519
2967
2520
2968
socketfd = None
2521
2969
if server_settings["socket"] != "":
2522
2970
socketfd = server_settings["socket"]
2538
2986
except IOError as e:
2539
2987
logger.error("Could not open file %r", pidfilename,
2540
2988
exc_info=e)
2541
2542
for name in ("_mandos", "mandos", "nobody"):
2989
2990
for name, group in (("_mandos", "_mandos"),
2991
("mandos", "mandos"),
2992
("nobody", "nogroup")):
2543
2993
try:
2544
2994
uid = pwd.getpwnam(name).pw_uid
2545
gid = pwd.getpwnam(name).pw_gid
2995
gid = pwd.getpwnam(group).pw_gid
2546
2996
break
2547
2997
except KeyError:
2548
2998
continue
2552
3002
try:
2553
3003
os.setgid(gid)
2554
3004
os.setuid(uid)
3005
if debug:
3006
logger.debug("Did setuid/setgid to {}:{}".format(uid,
3007
gid))
2555
3008
except OSError as error:
3009
logger.warning("Failed to setuid/setgid to {}:{}: {}"
3010
.format(uid, gid, os.strerror(error.errno)))
2556
3011
if error.errno != errno.EPERM:
2557
3012
raise
2558
3013
2559
3014
if debug:
2560
3015
# Enable all possible GnuTLS debugging
2561
3016
2562
3017
# "Use a log level over 10 to enable all debugging options."
2563
3018
# - GnuTLS manual
2564
gnutls.library.functions.gnutls_global_set_log_level(11)
2565
2566
@gnutls.library.types.gnutls_log_func
3019
gnutls.global_set_log_level(11)
3020
3021
@gnutls.log_func
2567
3022
def debug_gnutls(level, string):
2568
3023
logger.debug("GnuTLS: %s", string[:-1])
2569
2570
gnutls.library.functions.gnutls_global_set_log_function(
2571
debug_gnutls)
2572
3024
3025
gnutls.global_set_log_function(debug_gnutls)
3026
2573
3027
# Redirect stdin so all checkers get /dev/null
2574
3028
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2575
3029
os.dup2(null, sys.stdin.fileno())
2576
3030
if null > 2:
2577
3031
os.close(null)
2578
3032
2579
3033
# Need to fork before connecting to D-Bus
2580
3034
if not foreground:
2581
3035
# Close all input and output, do double fork, etc.
2582
3036
daemon()
2583
2584
# multiprocessing will use threads, so before we use gobject we
2585
# need to inform gobject that threads will be used.
2586
gobject.threads_init()
2587
3037
3038
# multiprocessing will use threads, so before we use GLib we need
3039
# to inform GLib that threads will be used.
3040
GLib.threads_init()
3041
2588
3042
global main_loop
2589
3043
# From the Avahi example code
2590
3044
DBusGMainLoop(set_as_default=True)
2591
main_loop = gobject.MainLoop()
3045
main_loop = GLib.MainLoop()
2592
3046
bus = dbus.SystemBus()
2593
3047
# End of Avahi example code
2594
3048
if use_dbus:
2607
3061
if zeroconf:
2608
3062
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2609
3063
service = AvahiServiceToSyslog(
2610
name = server_settings["servicename"],
2611
servicetype = "_mandos._tcp",
2612
protocol = protocol,
2613
bus = bus)
3064
name=server_settings["servicename"],
3065
servicetype="_mandos._tcp",
3066
protocol=protocol,
3067
bus=bus)
2614
3068
if server_settings["interface"]:
2615
3069
service.interface = if_nametoindex(
2616
3070
server_settings["interface"].encode("utf-8"))
2617
3071
2618
3072
global multiprocessing_manager
2619
3073
multiprocessing_manager = multiprocessing.Manager()
2620
3074
2621
3075
client_class = Client
2622
3076
if use_dbus:
2623
client_class = functools.partial(ClientDBus, bus = bus)
2624
3077
client_class = functools.partial(ClientDBus, bus=bus)
3078
2625
3079
client_settings = Client.config_parser(client_config)
2626
3080
old_client_settings = {}
2627
3081
clients_data = {}
2628
3082
2629
3083
# This is used to redirect stdout and stderr for checker processes
2630
3084
global wnull
2631
wnull = open(os.devnull, "w") # A writable /dev/null
3085
wnull = open(os.devnull, "w") # A writable /dev/null
2632
3086
# Only used if server is running in foreground but not in debug
2633
3087
# mode
2634
3088
if debug or not foreground:
2635
3089
wnull.close()
2636
3090
2637
3091
# Get client data and settings from last running state.
2638
3092
if server_settings["restore"]:
2639
3093
try:
2640
3094
with open(stored_state_path, "rb") as stored_state:
2641
clients_data, old_client_settings = pickle.load(
2642
stored_state)
3095
if sys.version_info.major == 2:
3096
clients_data, old_client_settings = pickle.load(
3097
stored_state)
3098
else:
3099
bytes_clients_data, bytes_old_client_settings = (
3100
pickle.load(stored_state, encoding="bytes"))
3101
# Fix bytes to strings
3102
# clients_data
3103
# .keys()
3104
clients_data = {(key.decode("utf-8")
3105
if isinstance(key, bytes)
3106
else key): value
3107
for key, value in
3108
bytes_clients_data.items()}
3109
del bytes_clients_data
3110
for key in clients_data:
3111
value = {(k.decode("utf-8")
3112
if isinstance(k, bytes) else k): v
3113
for k, v in
3114
clients_data[key].items()}
3115
clients_data[key] = value
3116
# .client_structure
3117
value["client_structure"] = [
3118
(s.decode("utf-8")
3119
if isinstance(s, bytes)
3120
else s) for s in
3121
value["client_structure"]]
3122
# .name & .host
3123
for k in ("name", "host"):
3124
if isinstance(value[k], bytes):
3125
value[k] = value[k].decode("utf-8")
3126
# old_client_settings
3127
# .keys()
3128
old_client_settings = {
3129
(key.decode("utf-8")
3130
if isinstance(key, bytes)
3131
else key): value
3132
for key, value in
3133
bytes_old_client_settings.items()}
3134
del bytes_old_client_settings
3135
# .host
3136
for value in old_client_settings.values():
3137
if isinstance(value["host"], bytes):
3138
value["host"] = (value["host"]
3139
.decode("utf-8"))
2643
3140
os.remove(stored_state_path)
2644
3141
except IOError as e:
2645
3142
if e.errno == errno.ENOENT:
2653
3150
logger.warning("Could not load persistent state: "
2654
3151
"EOFError:",
2655
3152
exc_info=e)
2656
3153
2657
3154
with PGPEngine() as pgp:
2658
3155
for client_name, client in clients_data.items():
2659
3156
# Skip removed clients
2660
3157
if client_name not in client_settings:
2661
3158
continue
2662
3159
2663
3160
# Decide which value to use after restoring saved state.
2664
3161
# We have three different values: Old config file,
2665
3162
# new config file, and saved state.
2676
3173
client[name] = value
2677
3174
except KeyError:
2678
3175
pass
2679
3176
2680
3177
# Clients who has passed its expire date can still be
2681
3178
# enabled if its last checker was successful. A Client
2682
3179
# whose checker succeeded before we stored its state is
2715
3212
client_name))
2716
3213
client["secret"] = (client_settings[client_name]
2717
3214
["secret"])
2718
3215
2719
3216
# Add/remove clients based on new changes made to config
2720
3217
for client_name in (set(old_client_settings)
2721
3218
- set(client_settings)):
2723
3220
for client_name in (set(client_settings)
2724
3221
- set(old_client_settings)):
2725
3222
clients_data[client_name] = client_settings[client_name]
2726
3223
2727
3224
# Create all client objects
2728
3225
for client_name, client in clients_data.items():
2729
3226
tcp_server.clients[client_name] = client_class(
2730
name = client_name,
2731
settings = client,
2732
server_settings = server_settings)
2733
3227
name=client_name,
3228
settings=client,
3229
server_settings=server_settings)
3230
2734
3231
if not tcp_server.clients:
2735
3232
logger.warning("No clients defined")
2736
3233
2737
3234
if not foreground:
2738
3235
if pidfile is not None:
2739
3236
pid = os.getpid()
2745
3242
pidfilename, pid)
2746
3243
del pidfile
2747
3244
del pidfilename
2748
2749
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2750
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2751
3245
3246
for termsig in (signal.SIGHUP, signal.SIGTERM):
3247
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3248
lambda: main_loop.quit() and False)
3249
2752
3250
if use_dbus:
2753
3251
2754
3252
@alternate_dbus_interfaces(
2755
{ "se.recompile.Mandos": "se.bsnet.fukt.Mandos" })
2756
class MandosDBusService(DBusObjectWithProperties):
3253
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3254
class MandosDBusService(DBusObjectWithObjectManager):
2757
3255
"""A D-Bus proxy object"""
2758
3256
2759
3257
def __init__(self):
2760
3258
dbus.service.Object.__init__(self, bus, "/")
2761
3259
2762
3260
_interface = "se.recompile.Mandos"
2763
2764
@dbus_interface_annotations(_interface)
2765
def _foo(self):
2766
return {
2767
"org.freedesktop.DBus.Property.EmitsChangedSignal":
2768
"false" }
2769
3261
2770
3262
@dbus.service.signal(_interface, signature="o")
2771
3263
def ClientAdded(self, objpath):
2772
3264
"D-Bus signal"
2773
3265
pass
2774
3266
2775
3267
@dbus.service.signal(_interface, signature="ss")
2776
3268
def ClientNotFound(self, fingerprint, address):
2777
3269
"D-Bus signal"
2778
3270
pass
2779
3271
3272
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3273
"true"})
2780
3274
@dbus.service.signal(_interface, signature="os")
2781
3275
def ClientRemoved(self, objpath, name):
2782
3276
"D-Bus signal"
2783
3277
pass
2784
3278
3279
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3280
"true"})
2785
3281
@dbus.service.method(_interface, out_signature="ao")
2786
3282
def GetAllClients(self):
2787
3283
"D-Bus method"
2788
3284
return dbus.Array(c.dbus_object_path for c in
2789
tcp_server.clients.itervalues())
2790
3285
tcp_server.clients.values())
3286
3287
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3288
"true"})
2791
3289
@dbus.service.method(_interface,
2792
3290
out_signature="a{oa{sv}}")
2793
3291
def GetAllClientsWithProperties(self):
2794
3292
"D-Bus method"
2795
3293
return dbus.Dictionary(
2796
{ c.dbus_object_path: c.GetAll("")
2797
for c in tcp_server.clients.itervalues() },
3294
{c.dbus_object_path: c.GetAll(
3295
"se.recompile.Mandos.Client")
3296
for c in tcp_server.clients.values()},
2798
3297
signature="oa{sv}")
2799
3298
2800
3299
@dbus.service.method(_interface, in_signature="o")
2801
3300
def RemoveClient(self, object_path):
2802
3301
"D-Bus method"
2803
for c in tcp_server.clients.itervalues():
3302
for c in tcp_server.clients.values():
2804
3303
if c.dbus_object_path == object_path:
2805
3304
del tcp_server.clients[c.name]
2806
3305
c.remove_from_connection()
2807
# Don't signal anything except ClientRemoved
3306
# Don't signal the disabling
2808
3307
c.disable(quiet=True)
2809
# Emit D-Bus signal
2810
self.ClientRemoved(object_path, c.name)
3308
# Emit D-Bus signal for removal
3309
self.client_removed_signal(c)
2811
3310
return
2812
3311
raise KeyError(object_path)
2813
3312
2814
3313
del _interface
2815
3314
3315
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3316
out_signature="a{oa{sa{sv}}}")
3317
def GetManagedObjects(self):
3318
"""D-Bus method"""
3319
return dbus.Dictionary(
3320
{client.dbus_object_path:
3321
dbus.Dictionary(
3322
{interface: client.GetAll(interface)
3323
for interface in
3324
client._get_all_interface_names()})
3325
for client in tcp_server.clients.values()})
3326
3327
def client_added_signal(self, client):
3328
"""Send the new standard signal and the old signal"""
3329
if use_dbus:
3330
# New standard signal
3331
self.InterfacesAdded(
3332
client.dbus_object_path,
3333
dbus.Dictionary(
3334
{interface: client.GetAll(interface)
3335
for interface in
3336
client._get_all_interface_names()}))
3337
# Old signal
3338
self.ClientAdded(client.dbus_object_path)
3339
3340
def client_removed_signal(self, client):
3341
"""Send the new standard signal and the old signal"""
3342
if use_dbus:
3343
# New standard signal
3344
self.InterfacesRemoved(
3345
client.dbus_object_path,
3346
client._get_all_interface_names())
3347
# Old signal
3348
self.ClientRemoved(client.dbus_object_path,
3349
client.name)
3350
2816
3351
mandos_dbus_service = MandosDBusService()
2817
3352
3353
# Save modules to variables to exempt the modules from being
3354
# unloaded before the function registered with atexit() is run.
3355
mp = multiprocessing
3356
wn = wnull
3357
2818
3358
def cleanup():
2819
3359
"Cleanup function; run on exit"
2820
3360
if zeroconf:
2821
3361
service.cleanup()
2822
2823
multiprocessing.active_children()
2824
wnull.close()
3362
3363
mp.active_children()
3364
wn.close()
2825
3365
if not (tcp_server.clients or client_settings):
2826
3366
return
2827
3367
2828
3368
# Store client before exiting. Secrets are encrypted with key
2829
3369
# based on what config file has. If config file is
2830
3370
# removed/edited, old secret will thus be unrecovable.
2831
3371
clients = {}
2832
3372
with PGPEngine() as pgp:
2833
for client in tcp_server.clients.itervalues():
3373
for client in tcp_server.clients.values():
2834
3374
key = client_settings[client.name]["secret"]
2835
3375
client.encrypted_secret = pgp.encrypt(client.secret,
2836
3376
key)
2837
3377
client_dict = {}
2838
3378
2839
3379
# A list of attributes that can not be pickled
2840
3380
# + secret.
2841
exclude = { "bus", "changedstate", "secret",
2842
"checker", "server_settings" }
3381
exclude = {"bus", "changedstate", "secret",
3382
"checker", "server_settings"}
2843
3383
for name, typ in inspect.getmembers(dbus.service
2844
3384
.Object):
2845
3385
exclude.add(name)
2846
3386
2847
3387
client_dict["encrypted_secret"] = (client
2848
3388
.encrypted_secret)
2849
3389
for attr in client.client_structure:
2850
3390
if attr not in exclude:
2851
3391
client_dict[attr] = getattr(client, attr)
2852
3392
2853
3393
clients[client.name] = client_dict
2854
3394
del client_settings[client.name]["secret"]
2855
3395
2856
3396
try:
2857
3397
with tempfile.NamedTemporaryFile(
2858
3398
mode='wb',
2860
3400
prefix='clients-',
2861
3401
dir=os.path.dirname(stored_state_path),
2862
3402
delete=False) as stored_state:
2863
pickle.dump((clients, client_settings), stored_state)
3403
pickle.dump((clients, client_settings), stored_state,
3404
protocol=2)
2864
3405
tempname = stored_state.name
2865
3406
os.rename(tempname, stored_state_path)
2866
3407
except (IOError, OSError) as e:
2876
3417
logger.warning("Could not save persistent state:",
2877
3418
exc_info=e)
2878
3419
raise
2879
3420
2880
3421
# Delete all clients, and settings from config
2881
3422
while tcp_server.clients:
2882
3423
name, client = tcp_server.clients.popitem()
2883
3424
if use_dbus:
2884
3425
client.remove_from_connection()
2885
# Don't signal anything except ClientRemoved
3426
# Don't signal the disabling
2886
3427
client.disable(quiet=True)
3428
# Emit D-Bus signal for removal
2887
3429
if use_dbus:
2888
# Emit D-Bus signal
2889
mandos_dbus_service.ClientRemoved(
2890
client.dbus_object_path, client.name)
3430
mandos_dbus_service.client_removed_signal(client)
2891
3431
client_settings.clear()
2892
3432
2893
3433
atexit.register(cleanup)
2894
2895
for client in tcp_server.clients.itervalues():
3434
3435
for client in tcp_server.clients.values():
2896
3436
if use_dbus:
2897
# Emit D-Bus signal
2898
mandos_dbus_service.ClientAdded(client.dbus_object_path)
3437
# Emit D-Bus signal for adding
3438
mandos_dbus_service.client_added_signal(client)
2899
3439
# Need to initiate checking of clients
2900
3440
if client.enabled:
2901
3441
client.init_checker()
2902
3442
2903
3443
tcp_server.enable()
2904
3444
tcp_server.server_activate()
2905
3445
2906
3446
# Find out what port we got
2907
3447
if zeroconf:
2908
3448
service.port = tcp_server.socket.getsockname()[1]
2913
3453
else: # IPv4
2914
3454
logger.info("Now listening on address %r, port %d",
2915
3455
*tcp_server.socket.getsockname())
2916
2917
#service.interface = tcp_server.socket.getsockname()[3]
2918
3456
3457
# service.interface = tcp_server.socket.getsockname()[3]
3458
2919
3459
try:
2920
3460
if zeroconf:
2921
3461
# From the Avahi example code
2926
3466
cleanup()
2927
3467
sys.exit(1)
2928
3468
# End of Avahi example code
2929
2930
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2931
lambda *args, **kwargs:
2932
(tcp_server.handle_request
2933
(*args[2:], **kwargs) or True))
2934
3469
3470
GLib.io_add_watch(tcp_server.fileno(), GLib.IO_IN,
3471
lambda *args, **kwargs:
3472
(tcp_server.handle_request
3473
(*args[2:], **kwargs) or True))
3474
2935
3475
logger.debug("Starting main loop")
2936
3476
main_loop.run()
2937
3477
except AvahiError as error:
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0