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- Committer: Teddy Hogeborn
- Date: 2016-08-26 18:44:21 UTC
- Revision ID: teddy@recompile.se-20160826184421-gjqjgzxy3lupx9n3
Fix bug where mandos server could not find GnuTLS library
* mandos (GnuTLS): Try to find both "gnutls" and variant name
"gnutls-deb0", for a Debian Jessie system which
does not have the package "gnutls28-dev" installed.
* mandos (GnuTLS): Try to find both "gnutls" and variant name
"gnutls-deb0", for a Debian Jessie system which
does not have the package "gnutls28-dev" installed.
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
6
# This program is partly derived from an example program for an Avahi
7
7
# service publisher, downloaded from
8
8
# <http://avahi.org/wiki/PythonPublishExample>. This includes the
9
9
# methods "add", "remove", "server_state_changed",
10
10
# "entry_group_state_changed", "cleanup", and "activate" in the
11
11
# "AvahiService" class, and some lines in "main".
12
#
12
#
13
13
# Everything else is
14
# Copyright © 2008-2015 Teddy Hogeborn
15
# Copyright © 2008-2015 Björn Påhlsson
16
#
14
# Copyright © 2008-2016 Teddy Hogeborn
15
# Copyright © 2008-2016 Björn Påhlsson
16
#
17
17
# 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 = "1.7.10"
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):
129
155
"""init logger and add loglevel"""
130
156
131
157
global syslogger
132
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 class name "GnuTLS" here, since this method is
519
# called before the assignment to the "gnutls" global variable
520
# happens.
521
if GnuTLS.check_version(self._need_version) is None:
522
raise GnuTLS.Error("Needs GnuTLS {} or later"
523
.format(self._need_version))
524
525
# Unless otherwise indicated, the constants and types below are
526
# all from the gnutls/gnutls.h C header file.
527
528
# Constants
529
E_SUCCESS = 0
530
E_INTERRUPTED = -52
531
E_AGAIN = -28
532
CRT_OPENPGP = 2
533
CLIENT = 2
534
SHUT_RDWR = 0
535
CRD_CERTIFICATE = 1
536
E_NO_CERTIFICATE_FOUND = -49
537
OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
538
539
# Types
540
class session_int(ctypes.Structure):
541
_fields_ = []
542
session_t = ctypes.POINTER(session_int)
543
544
class certificate_credentials_st(ctypes.Structure):
545
_fields_ = []
546
certificate_credentials_t = ctypes.POINTER(
547
certificate_credentials_st)
548
certificate_type_t = ctypes.c_int
549
550
class datum_t(ctypes.Structure):
551
_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
552
('size', ctypes.c_uint)]
553
554
class openpgp_crt_int(ctypes.Structure):
555
_fields_ = []
556
openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
557
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
558
log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
559
credentials_type_t = ctypes.c_int
560
transport_ptr_t = ctypes.c_void_p
561
close_request_t = ctypes.c_int
562
563
# Exceptions
564
class Error(Exception):
565
# We need to use the class name "GnuTLS" here, since this
566
# exception might be raised from within GnuTLS.__init__,
567
# which is called before the assignment to the "gnutls"
568
# global variable has happened.
569
def __init__(self, message=None, code=None, args=()):
570
# Default usage is by a message string, but if a return
571
# code is passed, convert it to a string with
572
# gnutls.strerror()
573
self.code = code
574
if message is None and code is not None:
575
message = GnuTLS.strerror(code)
576
return super(GnuTLS.Error, self).__init__(
577
message, *args)
578
579
class CertificateSecurityError(Error):
580
pass
581
582
# Classes
583
class Credentials(object):
584
def __init__(self):
585
self._c_object = gnutls.certificate_credentials_t()
586
gnutls.certificate_allocate_credentials(
587
ctypes.byref(self._c_object))
588
self.type = gnutls.CRD_CERTIFICATE
589
590
def __del__(self):
591
gnutls.certificate_free_credentials(self._c_object)
592
593
class ClientSession(object):
594
def __init__(self, socket, credentials=None):
595
self._c_object = gnutls.session_t()
596
gnutls.init(ctypes.byref(self._c_object), gnutls.CLIENT)
597
gnutls.set_default_priority(self._c_object)
598
gnutls.transport_set_ptr(self._c_object, socket.fileno())
599
gnutls.handshake_set_private_extensions(self._c_object,
600
True)
601
self.socket = socket
602
if credentials is None:
603
credentials = gnutls.Credentials()
604
gnutls.credentials_set(self._c_object, credentials.type,
605
ctypes.cast(credentials._c_object,
606
ctypes.c_void_p))
607
self.credentials = credentials
608
609
def __del__(self):
610
gnutls.deinit(self._c_object)
611
612
def handshake(self):
613
return gnutls.handshake(self._c_object)
614
615
def send(self, data):
616
data = bytes(data)
617
data_len = len(data)
618
while data_len > 0:
619
data_len -= gnutls.record_send(self._c_object,
620
data[-data_len:],
621
data_len)
622
623
def bye(self):
624
return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
625
626
# Error handling functions
627
def _error_code(result):
628
"""A function to raise exceptions on errors, suitable
629
for the 'restype' attribute on ctypes functions"""
630
if result >= 0:
631
return result
632
if result == gnutls.E_NO_CERTIFICATE_FOUND:
633
raise gnutls.CertificateSecurityError(code=result)
634
raise gnutls.Error(code=result)
635
636
def _retry_on_error(result, func, arguments):
637
"""A function to retry on some errors, suitable
638
for the 'errcheck' attribute on ctypes functions"""
639
while result < 0:
640
if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
641
return _error_code(result)
642
result = func(*arguments)
643
return result
644
645
# Unless otherwise indicated, the function declarations below are
646
# all from the gnutls/gnutls.h C header file.
647
648
# Functions
649
priority_set_direct = _library.gnutls_priority_set_direct
650
priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
651
ctypes.POINTER(ctypes.c_char_p)]
652
priority_set_direct.restype = _error_code
653
654
init = _library.gnutls_init
655
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
656
init.restype = _error_code
657
658
set_default_priority = _library.gnutls_set_default_priority
659
set_default_priority.argtypes = [session_t]
660
set_default_priority.restype = _error_code
661
662
record_send = _library.gnutls_record_send
663
record_send.argtypes = [session_t, ctypes.c_void_p,
664
ctypes.c_size_t]
665
record_send.restype = ctypes.c_ssize_t
666
record_send.errcheck = _retry_on_error
667
668
certificate_allocate_credentials = (
669
_library.gnutls_certificate_allocate_credentials)
670
certificate_allocate_credentials.argtypes = [
671
ctypes.POINTER(certificate_credentials_t)]
672
certificate_allocate_credentials.restype = _error_code
673
674
certificate_free_credentials = (
675
_library.gnutls_certificate_free_credentials)
676
certificate_free_credentials.argtypes = [
677
certificate_credentials_t]
678
certificate_free_credentials.restype = None
679
680
handshake_set_private_extensions = (
681
_library.gnutls_handshake_set_private_extensions)
682
handshake_set_private_extensions.argtypes = [session_t,
683
ctypes.c_int]
684
handshake_set_private_extensions.restype = None
685
686
credentials_set = _library.gnutls_credentials_set
687
credentials_set.argtypes = [session_t, credentials_type_t,
688
ctypes.c_void_p]
689
credentials_set.restype = _error_code
690
691
strerror = _library.gnutls_strerror
692
strerror.argtypes = [ctypes.c_int]
693
strerror.restype = ctypes.c_char_p
694
695
certificate_type_get = _library.gnutls_certificate_type_get
696
certificate_type_get.argtypes = [session_t]
697
certificate_type_get.restype = _error_code
698
699
certificate_get_peers = _library.gnutls_certificate_get_peers
700
certificate_get_peers.argtypes = [session_t,
701
ctypes.POINTER(ctypes.c_uint)]
702
certificate_get_peers.restype = ctypes.POINTER(datum_t)
703
704
global_set_log_level = _library.gnutls_global_set_log_level
705
global_set_log_level.argtypes = [ctypes.c_int]
706
global_set_log_level.restype = None
707
708
global_set_log_function = _library.gnutls_global_set_log_function
709
global_set_log_function.argtypes = [log_func]
710
global_set_log_function.restype = None
711
712
deinit = _library.gnutls_deinit
713
deinit.argtypes = [session_t]
714
deinit.restype = None
715
716
handshake = _library.gnutls_handshake
717
handshake.argtypes = [session_t]
718
handshake.restype = _error_code
719
handshake.errcheck = _retry_on_error
720
721
transport_set_ptr = _library.gnutls_transport_set_ptr
722
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
723
transport_set_ptr.restype = None
724
725
bye = _library.gnutls_bye
726
bye.argtypes = [session_t, close_request_t]
727
bye.restype = _error_code
728
bye.errcheck = _retry_on_error
729
730
check_version = _library.gnutls_check_version
731
check_version.argtypes = [ctypes.c_char_p]
732
check_version.restype = ctypes.c_char_p
733
734
# All the function declarations below are from gnutls/openpgp.h
735
736
openpgp_crt_init = _library.gnutls_openpgp_crt_init
737
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
738
openpgp_crt_init.restype = _error_code
739
740
openpgp_crt_import = _library.gnutls_openpgp_crt_import
741
openpgp_crt_import.argtypes = [openpgp_crt_t,
742
ctypes.POINTER(datum_t),
743
openpgp_crt_fmt_t]
744
openpgp_crt_import.restype = _error_code
745
746
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
747
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
748
ctypes.POINTER(ctypes.c_uint)]
749
openpgp_crt_verify_self.restype = _error_code
750
751
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
752
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
753
openpgp_crt_deinit.restype = None
754
755
openpgp_crt_get_fingerprint = (
756
_library.gnutls_openpgp_crt_get_fingerprint)
757
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
758
ctypes.c_void_p,
759
ctypes.POINTER(
760
ctypes.c_size_t)]
761
openpgp_crt_get_fingerprint.restype = _error_code
762
763
# Remove non-public functions
764
del _error_code, _retry_on_error
765
# Create the global "gnutls" object, simulating a module
766
gnutls = GnuTLS()
767
768
438
769
def call_pipe(connection, # : multiprocessing.Connection
439
770
func, *args, **kwargs):
440
771
"""This function is meant to be called by multiprocessing.Process
441
772
442
773
This function runs func(*args, **kwargs), and writes the resulting
443
774
return value on the provided multiprocessing.Connection.
444
775
"""
445
776
connection.send(func(*args, **kwargs))
446
777
connection.close()
447
778
779
448
780
class Client(object):
449
781
"""A representation of a client host served by this server.
450
782
451
783
Attributes:
452
784
approved: bool(); 'None' if not yet approved/disapproved
453
785
approval_delay: datetime.timedelta(); Time to wait for approval
455
787
checker: subprocess.Popen(); a running checker process used
456
788
to see if the client lives.
457
789
'None' if no process is running.
458
checker_callback_tag: a gobject event source tag, or None
790
checker_callback_tag: a GLib event source tag, or None
459
791
checker_command: string; External command which is run to check
460
792
if client lives. %() expansions are done at
461
793
runtime with vars(self) as dict, so that for
462
794
instance %(name)s can be used in the command.
463
checker_initiator_tag: a gobject event source tag, or None
795
checker_initiator_tag: a GLib event source tag, or None
464
796
created: datetime.datetime(); (UTC) object creation
465
797
client_structure: Object describing what attributes a client has
466
798
and is used for storing the client at exit
467
799
current_checker_command: string; current running checker_command
468
disable_initiator_tag: a gobject event source tag, or None
800
disable_initiator_tag: a GLib event source tag, or None
469
801
enabled: bool()
470
802
fingerprint: string (40 or 32 hexadecimal digits); used to
471
803
uniquely identify the client
490
822
disabled, or None
491
823
server_settings: The server_settings dict from main()
492
824
"""
493
825
494
826
runtime_expansions = ("approval_delay", "approval_duration",
495
827
"created", "enabled", "expires",
496
828
"fingerprint", "host", "interval",
507
839
"approved_by_default": "True",
508
840
"enabled": "True",
509
841
}
510
842
511
843
@staticmethod
512
844
def config_parser(config):
513
845
"""Construct a new dict of client settings of this form:
520
852
for client_name in config.sections():
521
853
section = dict(config.items(client_name))
522
854
client = settings[client_name] = {}
523
855
524
856
client["host"] = section["host"]
525
857
# Reformat values from string types to Python types
526
858
client["approved_by_default"] = config.getboolean(
527
859
client_name, "approved_by_default")
528
860
client["enabled"] = config.getboolean(client_name,
529
861
"enabled")
530
862
531
863
# Uppercase and remove spaces from fingerprint for later
532
864
# comparison purposes with return value from the
533
865
# fingerprint() function
534
866
client["fingerprint"] = (section["fingerprint"].upper()
535
867
.replace(" ", ""))
536
868
if "secret" in section:
537
client["secret"] = section["secret"].decode("base64")
869
client["secret"] = codecs.decode(section["secret"]
870
.encode("utf-8"),
871
"base64")
538
872
elif "secfile" in section:
539
873
with open(os.path.expanduser(os.path.expandvars
540
874
(section["secfile"])),
555
889
client["last_approval_request"] = None
556
890
client["last_checked_ok"] = None
557
891
client["last_checker_status"] = -2
558
892
559
893
return settings
560
561
def __init__(self, settings, name = None, server_settings=None):
894
895
def __init__(self, settings, name=None, server_settings=None):
562
896
self.name = name
563
897
if server_settings is None:
564
898
server_settings = {}
566
900
# adding all client settings
567
901
for setting, value in settings.items():
568
902
setattr(self, setting, value)
569
903
570
904
if self.enabled:
571
905
if not hasattr(self, "last_enabled"):
572
906
self.last_enabled = datetime.datetime.utcnow()
576
910
else:
577
911
self.last_enabled = None
578
912
self.expires = None
579
913
580
914
logger.debug("Creating client %r", self.name)
581
915
logger.debug(" Fingerprint: %s", self.fingerprint)
582
916
self.created = settings.get("created",
583
917
datetime.datetime.utcnow())
584
918
585
919
# attributes specific for this server instance
586
920
self.checker = None
587
921
self.checker_initiator_tag = None
593
927
self.changedstate = multiprocessing_manager.Condition(
594
928
multiprocessing_manager.Lock())
595
929
self.client_structure = [attr
596
for attr in self.__dict__.iterkeys()
930
for attr in self.__dict__.keys()
597
931
if not attr.startswith("_")]
598
932
self.client_structure.append("client_structure")
599
933
600
934
for name, t in inspect.getmembers(
601
935
type(self), lambda obj: isinstance(obj, property)):
602
936
if not name.startswith("_"):
603
937
self.client_structure.append(name)
604
938
605
939
# Send notice to process children that client state has changed
606
940
def send_changedstate(self):
607
941
with self.changedstate:
608
942
self.changedstate.notify_all()
609
943
610
944
def enable(self):
611
945
"""Start this client's checker and timeout hooks"""
612
946
if getattr(self, "enabled", False):
617
951
self.last_enabled = datetime.datetime.utcnow()
618
952
self.init_checker()
619
953
self.send_changedstate()
620
954
621
955
def disable(self, quiet=True):
622
956
"""Disable this client."""
623
957
if not getattr(self, "enabled", False):
625
959
if not quiet:
626
960
logger.info("Disabling client %s", self.name)
627
961
if getattr(self, "disable_initiator_tag", None) is not None:
628
gobject.source_remove(self.disable_initiator_tag)
962
GLib.source_remove(self.disable_initiator_tag)
629
963
self.disable_initiator_tag = None
630
964
self.expires = None
631
965
if getattr(self, "checker_initiator_tag", None) is not None:
632
gobject.source_remove(self.checker_initiator_tag)
966
GLib.source_remove(self.checker_initiator_tag)
633
967
self.checker_initiator_tag = None
634
968
self.stop_checker()
635
969
self.enabled = False
636
970
if not quiet:
637
971
self.send_changedstate()
638
# Do not run this again if called by a gobject.timeout_add
972
# Do not run this again if called by a GLib.timeout_add
639
973
return False
640
974
641
975
def __del__(self):
642
976
self.disable()
643
977
644
978
def init_checker(self):
645
979
# Schedule a new checker to be started an 'interval' from now,
646
980
# and every interval from then on.
647
981
if self.checker_initiator_tag is not None:
648
gobject.source_remove(self.checker_initiator_tag)
649
self.checker_initiator_tag = gobject.timeout_add(
982
GLib.source_remove(self.checker_initiator_tag)
983
self.checker_initiator_tag = GLib.timeout_add(
650
984
int(self.interval.total_seconds() * 1000),
651
985
self.start_checker)
652
986
# Schedule a disable() when 'timeout' has passed
653
987
if self.disable_initiator_tag is not None:
654
gobject.source_remove(self.disable_initiator_tag)
655
self.disable_initiator_tag = gobject.timeout_add(
988
GLib.source_remove(self.disable_initiator_tag)
989
self.disable_initiator_tag = GLib.timeout_add(
656
990
int(self.timeout.total_seconds() * 1000), self.disable)
657
991
# Also start a new checker *right now*.
658
992
self.start_checker()
659
993
660
994
def checker_callback(self, source, condition, connection,
661
995
command):
662
996
"""The checker has completed, so take appropriate actions."""
665
999
# Read return code from connection (see call_pipe)
666
1000
returncode = connection.recv()
667
1001
connection.close()
668
1002
669
1003
if returncode >= 0:
670
1004
self.last_checker_status = returncode
671
1005
self.last_checker_signal = None
681
1015
logger.warning("Checker for %(name)s crashed?",
682
1016
vars(self))
683
1017
return False
684
1018
685
1019
def checked_ok(self):
686
1020
"""Assert that the client has been seen, alive and well."""
687
1021
self.last_checked_ok = datetime.datetime.utcnow()
688
1022
self.last_checker_status = 0
689
1023
self.last_checker_signal = None
690
1024
self.bump_timeout()
691
1025
692
1026
def bump_timeout(self, timeout=None):
693
1027
"""Bump up the timeout for this client."""
694
1028
if timeout is None:
695
1029
timeout = self.timeout
696
1030
if self.disable_initiator_tag is not None:
697
gobject.source_remove(self.disable_initiator_tag)
1031
GLib.source_remove(self.disable_initiator_tag)
698
1032
self.disable_initiator_tag = None
699
1033
if getattr(self, "enabled", False):
700
self.disable_initiator_tag = gobject.timeout_add(
1034
self.disable_initiator_tag = GLib.timeout_add(
701
1035
int(timeout.total_seconds() * 1000), self.disable)
702
1036
self.expires = datetime.datetime.utcnow() + timeout
703
1037
704
1038
def need_approval(self):
705
1039
self.last_approval_request = datetime.datetime.utcnow()
706
1040
707
1041
def start_checker(self):
708
1042
"""Start a new checker subprocess if one is not running.
709
1043
710
1044
If a checker already exists, leave it running and do
711
1045
nothing."""
712
1046
# The reason for not killing a running checker is that if we
717
1051
# checkers alone, the checker would have to take more time
718
1052
# than 'timeout' for the client to be disabled, which is as it
719
1053
# should be.
720
1054
721
1055
if self.checker is not None and not self.checker.is_alive():
722
1056
logger.warning("Checker was not alive; joining")
723
1057
self.checker.join()
727
1061
# Escape attributes for the shell
728
1062
escaped_attrs = {
729
1063
attr: re.escape(str(getattr(self, attr)))
730
for attr in self.runtime_expansions }
1064
for attr in self.runtime_expansions}
731
1065
try:
732
1066
command = self.checker_command % escaped_attrs
733
1067
except TypeError as error:
745
1079
# The exception is when not debugging but nevertheless
746
1080
# running in the foreground; use the previously
747
1081
# created wnull.
748
popen_args = { "close_fds": True,
749
"shell": True,
750
"cwd": "/" }
1082
popen_args = {"close_fds": True,
1083
"shell": True,
1084
"cwd": "/"}
751
1085
if (not self.server_settings["debug"]
752
1086
and self.server_settings["foreground"]):
753
1087
popen_args.update({"stdout": wnull,
754
"stderr": wnull })
755
pipe = multiprocessing.Pipe(duplex = False)
1088
"stderr": wnull})
1089
pipe = multiprocessing.Pipe(duplex=False)
756
1090
self.checker = multiprocessing.Process(
757
target = call_pipe,
758
args = (pipe[1], subprocess.call, command),
759
kwargs = popen_args)
1091
target=call_pipe,
1092
args=(pipe[1], subprocess.call, command),
1093
kwargs=popen_args)
760
1094
self.checker.start()
761
self.checker_callback_tag = gobject.io_add_watch(
762
pipe[0].fileno(), gobject.IO_IN,
1095
self.checker_callback_tag = GLib.io_add_watch(
1096
pipe[0].fileno(), GLib.IO_IN,
763
1097
self.checker_callback, pipe[0], command)
764
# Re-run this periodically if run by gobject.timeout_add
1098
# Re-run this periodically if run by GLib.timeout_add
765
1099
return True
766
1100
767
1101
def stop_checker(self):
768
1102
"""Force the checker process, if any, to stop."""
769
1103
if self.checker_callback_tag:
770
gobject.source_remove(self.checker_callback_tag)
1104
GLib.source_remove(self.checker_callback_tag)
771
1105
self.checker_callback_tag = None
772
1106
if getattr(self, "checker", None) is None:
773
1107
return
782
1116
byte_arrays=False):
783
1117
"""Decorators for marking methods of a DBusObjectWithProperties to
784
1118
become properties on the D-Bus.
785
1119
786
1120
The decorated method will be called with no arguments by "Get"
787
1121
and with one argument by "Set".
788
1122
789
1123
The parameters, where they are supported, are the same as
790
1124
dbus.service.method, except there is only "signature", since the
791
1125
type from Get() and the type sent to Set() is the same.
795
1129
if byte_arrays and signature != "ay":
796
1130
raise ValueError("Byte arrays not supported for non-'ay'"
797
1131
" signature {!r}".format(signature))
798
1132
799
1133
def decorator(func):
800
1134
func._dbus_is_property = True
801
1135
func._dbus_interface = dbus_interface
804
1138
func._dbus_name = func.__name__
805
1139
if func._dbus_name.endswith("_dbus_property"):
806
1140
func._dbus_name = func._dbus_name[:-14]
807
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
1141
func._dbus_get_args_options = {'byte_arrays': byte_arrays}
808
1142
return func
809
1143
810
1144
return decorator
811
1145
812
1146
813
1147
def dbus_interface_annotations(dbus_interface):
814
1148
"""Decorator for marking functions returning interface annotations
815
1149
816
1150
Usage:
817
1151
818
1152
@dbus_interface_annotations("org.example.Interface")
819
1153
def _foo(self): # Function name does not matter
820
1154
return {"org.freedesktop.DBus.Deprecated": "true",
821
1155
"org.freedesktop.DBus.Property.EmitsChangedSignal":
822
1156
"false"}
823
1157
"""
824
1158
825
1159
def decorator(func):
826
1160
func._dbus_is_interface = True
827
1161
func._dbus_interface = dbus_interface
828
1162
func._dbus_name = dbus_interface
829
1163
return func
830
1164
831
1165
return decorator
832
1166
833
1167
834
1168
def dbus_annotations(annotations):
835
1169
"""Decorator to annotate D-Bus methods, signals or properties
836
1170
Usage:
837
1171
838
1172
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
839
1173
"org.freedesktop.DBus.Property."
840
1174
"EmitsChangedSignal": "false"})
842
1176
access="r")
843
1177
def Property_dbus_property(self):
844
1178
return dbus.Boolean(False)
1179
1180
See also the DBusObjectWithAnnotations class.
845
1181
"""
846
1182
847
1183
def decorator(func):
848
1184
func._dbus_annotations = annotations
849
1185
return func
850
1186
851
1187
return decorator
852
1188
853
1189
869
1205
pass
870
1206
871
1207
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.
1208
class DBusObjectWithAnnotations(dbus.service.Object):
1209
"""A D-Bus object with annotations.
1210
1211
Classes inheriting from this can use the dbus_annotations
1212
decorator to add annotations to methods or signals.
878
1213
"""
879
1214
880
1215
@staticmethod
881
1216
def _is_dbus_thing(thing):
882
1217
"""Returns a function testing if an attribute is a D-Bus thing
883
1218
884
1219
If called like _is_dbus_thing("method") it returns a function
885
1220
suitable for use as predicate to inspect.getmembers().
886
1221
"""
887
1222
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
888
1223
False)
889
1224
890
1225
def _get_all_dbus_things(self, thing):
891
1226
"""Returns a generator of (name, attribute) pairs
892
1227
"""
895
1230
for cls in self.__class__.__mro__
896
1231
for name, athing in
897
1232
inspect.getmembers(cls, self._is_dbus_thing(thing)))
898
1233
1234
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1235
out_signature="s",
1236
path_keyword='object_path',
1237
connection_keyword='connection')
1238
def Introspect(self, object_path, connection):
1239
"""Overloading of standard D-Bus method.
1240
1241
Inserts annotation tags on methods and signals.
1242
"""
1243
xmlstring = dbus.service.Object.Introspect(self, object_path,
1244
connection)
1245
try:
1246
document = xml.dom.minidom.parseString(xmlstring)
1247
1248
for if_tag in document.getElementsByTagName("interface"):
1249
# Add annotation tags
1250
for typ in ("method", "signal"):
1251
for tag in if_tag.getElementsByTagName(typ):
1252
annots = dict()
1253
for name, prop in (self.
1254
_get_all_dbus_things(typ)):
1255
if (name == tag.getAttribute("name")
1256
and prop._dbus_interface
1257
== if_tag.getAttribute("name")):
1258
annots.update(getattr(
1259
prop, "_dbus_annotations", {}))
1260
for name, value in annots.items():
1261
ann_tag = document.createElement(
1262
"annotation")
1263
ann_tag.setAttribute("name", name)
1264
ann_tag.setAttribute("value", value)
1265
tag.appendChild(ann_tag)
1266
# Add interface annotation tags
1267
for annotation, value in dict(
1268
itertools.chain.from_iterable(
1269
annotations().items()
1270
for name, annotations
1271
in self._get_all_dbus_things("interface")
1272
if name == if_tag.getAttribute("name")
1273
)).items():
1274
ann_tag = document.createElement("annotation")
1275
ann_tag.setAttribute("name", annotation)
1276
ann_tag.setAttribute("value", value)
1277
if_tag.appendChild(ann_tag)
1278
# Fix argument name for the Introspect method itself
1279
if (if_tag.getAttribute("name")
1280
== dbus.INTROSPECTABLE_IFACE):
1281
for cn in if_tag.getElementsByTagName("method"):
1282
if cn.getAttribute("name") == "Introspect":
1283
for arg in cn.getElementsByTagName("arg"):
1284
if (arg.getAttribute("direction")
1285
== "out"):
1286
arg.setAttribute("name",
1287
"xml_data")
1288
xmlstring = document.toxml("utf-8")
1289
document.unlink()
1290
except (AttributeError, xml.dom.DOMException,
1291
xml.parsers.expat.ExpatError) as error:
1292
logger.error("Failed to override Introspection method",
1293
exc_info=error)
1294
return xmlstring
1295
1296
1297
class DBusObjectWithProperties(DBusObjectWithAnnotations):
1298
"""A D-Bus object with properties.
1299
1300
Classes inheriting from this can use the dbus_service_property
1301
decorator to expose methods as D-Bus properties. It exposes the
1302
standard Get(), Set(), and GetAll() methods on the D-Bus.
1303
"""
1304
899
1305
def _get_dbus_property(self, interface_name, property_name):
900
1306
"""Returns a bound method if one exists which is a D-Bus
901
1307
property with the specified name and interface.
906
1312
if (value._dbus_name == property_name
907
1313
and value._dbus_interface == interface_name):
908
1314
return value.__get__(self)
909
1315
910
1316
# No such property
911
1317
raise DBusPropertyNotFound("{}:{}.{}".format(
912
1318
self.dbus_object_path, interface_name, property_name))
913
1319
1320
@classmethod
1321
def _get_all_interface_names(cls):
1322
"""Get a sequence of all interfaces supported by an object"""
1323
return (name for name in set(getattr(getattr(x, attr),
1324
"_dbus_interface", None)
1325
for x in (inspect.getmro(cls))
1326
for attr in dir(x))
1327
if name is not None)
1328
914
1329
@dbus.service.method(dbus.PROPERTIES_IFACE,
915
1330
in_signature="ss",
916
1331
out_signature="v")
924
1339
if not hasattr(value, "variant_level"):
925
1340
return value
926
1341
return type(value)(value, variant_level=value.variant_level+1)
927
1342
928
1343
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
929
1344
def Set(self, interface_name, property_name, value):
930
1345
"""Standard D-Bus property Set() method, see D-Bus standard.
942
1357
value = dbus.ByteArray(b''.join(chr(byte)
943
1358
for byte in value))
944
1359
prop(value)
945
1360
946
1361
@dbus.service.method(dbus.PROPERTIES_IFACE,
947
1362
in_signature="s",
948
1363
out_signature="a{sv}")
949
1364
def GetAll(self, interface_name):
950
1365
"""Standard D-Bus property GetAll() method, see D-Bus
951
1366
standard.
952
1367
953
1368
Note: Will not include properties with access="write".
954
1369
"""
955
1370
properties = {}
966
1381
properties[name] = value
967
1382
continue
968
1383
properties[name] = type(value)(
969
value, variant_level = value.variant_level + 1)
1384
value, variant_level=value.variant_level + 1)
970
1385
return dbus.Dictionary(properties, signature="sv")
971
1386
972
1387
@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
973
1388
def PropertiesChanged(self, interface_name, changed_properties,
974
1389
invalidated_properties):
976
1391
standard.
977
1392
"""
978
1393
pass
979
1394
980
1395
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
981
1396
out_signature="s",
982
1397
path_keyword='object_path',
983
1398
connection_keyword='connection')
984
1399
def Introspect(self, object_path, connection):
985
1400
"""Overloading of standard D-Bus method.
986
1401
987
1402
Inserts property tags and interface annotation tags.
988
1403
"""
989
xmlstring = dbus.service.Object.Introspect(self, object_path,
990
connection)
1404
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1405
object_path,
1406
connection)
991
1407
try:
992
1408
document = xml.dom.minidom.parseString(xmlstring)
993
1409
994
1410
def make_tag(document, name, prop):
995
1411
e = document.createElement("property")
996
1412
e.setAttribute("name", name)
997
1413
e.setAttribute("type", prop._dbus_signature)
998
1414
e.setAttribute("access", prop._dbus_access)
999
1415
return e
1000
1416
1001
1417
for if_tag in document.getElementsByTagName("interface"):
1002
1418
# Add property tags
1003
1419
for tag in (make_tag(document, name, prop)
1006
1422
if prop._dbus_interface
1007
1423
== if_tag.getAttribute("name")):
1008
1424
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)
1425
# Add annotation tags for properties
1426
for tag in if_tag.getElementsByTagName("property"):
1427
annots = dict()
1428
for name, prop in self._get_all_dbus_things(
1429
"property"):
1430
if (name == tag.getAttribute("name")
1431
and prop._dbus_interface
1432
== if_tag.getAttribute("name")):
1433
annots.update(getattr(
1434
prop, "_dbus_annotations", {}))
1435
for name, value in annots.items():
1436
ann_tag = document.createElement(
1437
"annotation")
1438
ann_tag.setAttribute("name", name)
1439
ann_tag.setAttribute("value", value)
1440
tag.appendChild(ann_tag)
1038
1441
# Add the names to the return values for the
1039
1442
# "org.freedesktop.DBus.Properties" methods
1040
1443
if (if_tag.getAttribute("name")
1058
1461
exc_info=error)
1059
1462
return xmlstring
1060
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
1061
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,
1376
1837
if exitstatus >= 0:
1377
1838
# Emit D-Bus signal
1378
1839
self.CheckerCompleted(dbus.Int16(exitstatus),
1379
dbus.Int64(0),
1840
# This is specific to GNU libC
1841
dbus.Int64(exitstatus << 8),
1380
1842
dbus.String(command))
1381
1843
else:
1382
1844
# Emit D-Bus signal
1383
1845
self.CheckerCompleted(dbus.Int16(-1),
1384
1846
dbus.Int64(
1385
self.last_checker_signal),
1847
# This is specific to GNU libC
1848
(exitstatus << 8)
1849
| self.last_checker_signal),
1386
1850
dbus.String(command))
1387
1851
return ret
1388
1852
1389
1853
def start_checker(self, *args, **kwargs):
1390
1854
old_checker_pid = getattr(self.checker, "pid", None)
1391
1855
r = Client.start_checker(self, *args, **kwargs)
1395
1859
# Emit D-Bus signal
1396
1860
self.CheckerStarted(self.current_checker_command)
1397
1861
return r
1398
1862
1399
1863
def _reset_approved(self):
1400
1864
self.approved = None
1401
1865
return False
1402
1866
1403
1867
def approve(self, value=True):
1404
1868
self.approved = value
1405
gobject.timeout_add(int(self.approval_duration.total_seconds()
1406
* 1000), self._reset_approved)
1869
GLib.timeout_add(int(self.approval_duration.total_seconds()
1870
* 1000), self._reset_approved)
1407
1871
self.send_changedstate()
1408
1409
## D-Bus methods, signals & properties
1410
1411
## Interfaces
1412
1413
## Signals
1414
1872
1873
# D-Bus methods, signals & properties
1874
1875
# Interfaces
1876
1877
# Signals
1878
1415
1879
# CheckerCompleted - signal
1416
1880
@dbus.service.signal(_interface, signature="nxs")
1417
1881
def CheckerCompleted(self, exitcode, waitstatus, command):
1418
1882
"D-Bus signal"
1419
1883
pass
1420
1884
1421
1885
# CheckerStarted - signal
1422
1886
@dbus.service.signal(_interface, signature="s")
1423
1887
def CheckerStarted(self, command):
1424
1888
"D-Bus signal"
1425
1889
pass
1426
1890
1427
1891
# PropertyChanged - signal
1428
1892
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1429
1893
@dbus.service.signal(_interface, signature="sv")
1430
1894
def PropertyChanged(self, property, value):
1431
1895
"D-Bus signal"
1432
1896
pass
1433
1897
1434
1898
# GotSecret - signal
1435
1899
@dbus.service.signal(_interface)
1436
1900
def GotSecret(self):
1439
1903
server to mandos-client
1440
1904
"""
1441
1905
pass
1442
1906
1443
1907
# Rejected - signal
1444
1908
@dbus.service.signal(_interface, signature="s")
1445
1909
def Rejected(self, reason):
1446
1910
"D-Bus signal"
1447
1911
pass
1448
1912
1449
1913
# NeedApproval - signal
1450
1914
@dbus.service.signal(_interface, signature="tb")
1451
1915
def NeedApproval(self, timeout, default):
1452
1916
"D-Bus signal"
1453
1917
return self.need_approval()
1454
1455
## Methods
1456
1918
1919
# Methods
1920
1457
1921
# Approve - method
1458
1922
@dbus.service.method(_interface, in_signature="b")
1459
1923
def Approve(self, value):
1460
1924
self.approve(value)
1461
1925
1462
1926
# CheckedOK - method
1463
1927
@dbus.service.method(_interface)
1464
1928
def CheckedOK(self):
1465
1929
self.checked_ok()
1466
1930
1467
1931
# Enable - method
1932
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1468
1933
@dbus.service.method(_interface)
1469
1934
def Enable(self):
1470
1935
"D-Bus method"
1471
1936
self.enable()
1472
1937
1473
1938
# StartChecker - method
1939
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1474
1940
@dbus.service.method(_interface)
1475
1941
def StartChecker(self):
1476
1942
"D-Bus method"
1477
1943
self.start_checker()
1478
1944
1479
1945
# Disable - method
1946
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1480
1947
@dbus.service.method(_interface)
1481
1948
def Disable(self):
1482
1949
"D-Bus method"
1483
1950
self.disable()
1484
1951
1485
1952
# StopChecker - method
1953
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1486
1954
@dbus.service.method(_interface)
1487
1955
def StopChecker(self):
1488
1956
self.stop_checker()
1489
1490
## Properties
1491
1957
1958
# Properties
1959
1492
1960
# ApprovalPending - property
1493
1961
@dbus_service_property(_interface, signature="b", access="read")
1494
1962
def ApprovalPending_dbus_property(self):
1495
1963
return dbus.Boolean(bool(self.approvals_pending))
1496
1964
1497
1965
# ApprovedByDefault - property
1498
1966
@dbus_service_property(_interface,
1499
1967
signature="b",
1502
1970
if value is None: # get
1503
1971
return dbus.Boolean(self.approved_by_default)
1504
1972
self.approved_by_default = bool(value)
1505
1973
1506
1974
# ApprovalDelay - property
1507
1975
@dbus_service_property(_interface,
1508
1976
signature="t",
1512
1980
return dbus.UInt64(self.approval_delay.total_seconds()
1513
1981
* 1000)
1514
1982
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1515
1983
1516
1984
# ApprovalDuration - property
1517
1985
@dbus_service_property(_interface,
1518
1986
signature="t",
1522
1990
return dbus.UInt64(self.approval_duration.total_seconds()
1523
1991
* 1000)
1524
1992
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1525
1993
1526
1994
# Name - property
1995
@dbus_annotations(
1996
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1527
1997
@dbus_service_property(_interface, signature="s", access="read")
1528
1998
def Name_dbus_property(self):
1529
1999
return dbus.String(self.name)
1530
2000
1531
2001
# Fingerprint - property
2002
@dbus_annotations(
2003
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1532
2004
@dbus_service_property(_interface, signature="s", access="read")
1533
2005
def Fingerprint_dbus_property(self):
1534
2006
return dbus.String(self.fingerprint)
1535
2007
1536
2008
# Host - property
1537
2009
@dbus_service_property(_interface,
1538
2010
signature="s",
1541
2013
if value is None: # get
1542
2014
return dbus.String(self.host)
1543
2015
self.host = str(value)
1544
2016
1545
2017
# Created - property
2018
@dbus_annotations(
2019
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1546
2020
@dbus_service_property(_interface, signature="s", access="read")
1547
2021
def Created_dbus_property(self):
1548
2022
return datetime_to_dbus(self.created)
1549
2023
1550
2024
# LastEnabled - property
1551
2025
@dbus_service_property(_interface, signature="s", access="read")
1552
2026
def LastEnabled_dbus_property(self):
1553
2027
return datetime_to_dbus(self.last_enabled)
1554
2028
1555
2029
# Enabled - property
1556
2030
@dbus_service_property(_interface,
1557
2031
signature="b",
1563
2037
self.enable()
1564
2038
else:
1565
2039
self.disable()
1566
2040
1567
2041
# LastCheckedOK - property
1568
2042
@dbus_service_property(_interface,
1569
2043
signature="s",
1573
2047
self.checked_ok()
1574
2048
return
1575
2049
return datetime_to_dbus(self.last_checked_ok)
1576
2050
1577
2051
# LastCheckerStatus - property
1578
2052
@dbus_service_property(_interface, signature="n", access="read")
1579
2053
def LastCheckerStatus_dbus_property(self):
1580
2054
return dbus.Int16(self.last_checker_status)
1581
2055
1582
2056
# Expires - property
1583
2057
@dbus_service_property(_interface, signature="s", access="read")
1584
2058
def Expires_dbus_property(self):
1585
2059
return datetime_to_dbus(self.expires)
1586
2060
1587
2061
# LastApprovalRequest - property
1588
2062
@dbus_service_property(_interface, signature="s", access="read")
1589
2063
def LastApprovalRequest_dbus_property(self):
1590
2064
return datetime_to_dbus(self.last_approval_request)
1591
2065
1592
2066
# Timeout - property
1593
2067
@dbus_service_property(_interface,
1594
2068
signature="t",
1609
2083
if (getattr(self, "disable_initiator_tag", None)
1610
2084
is None):
1611
2085
return
1612
gobject.source_remove(self.disable_initiator_tag)
1613
self.disable_initiator_tag = gobject.timeout_add(
2086
GLib.source_remove(self.disable_initiator_tag)
2087
self.disable_initiator_tag = GLib.timeout_add(
1614
2088
int((self.expires - now).total_seconds() * 1000),
1615
2089
self.disable)
1616
2090
1617
2091
# ExtendedTimeout - property
1618
2092
@dbus_service_property(_interface,
1619
2093
signature="t",
1623
2097
return dbus.UInt64(self.extended_timeout.total_seconds()
1624
2098
* 1000)
1625
2099
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1626
2100
1627
2101
# Interval - property
1628
2102
@dbus_service_property(_interface,
1629
2103
signature="t",
1636
2110
return
1637
2111
if self.enabled:
1638
2112
# Reschedule checker run
1639
gobject.source_remove(self.checker_initiator_tag)
1640
self.checker_initiator_tag = gobject.timeout_add(
2113
GLib.source_remove(self.checker_initiator_tag)
2114
self.checker_initiator_tag = GLib.timeout_add(
1641
2115
value, self.start_checker)
1642
self.start_checker() # Start one now, too
1643
2116
self.start_checker() # Start one now, too
2117
1644
2118
# Checker - property
1645
2119
@dbus_service_property(_interface,
1646
2120
signature="s",
1649
2123
if value is None: # get
1650
2124
return dbus.String(self.checker_command)
1651
2125
self.checker_command = str(value)
1652
2126
1653
2127
# CheckerRunning - property
1654
2128
@dbus_service_property(_interface,
1655
2129
signature="b",
1661
2135
self.start_checker()
1662
2136
else:
1663
2137
self.stop_checker()
1664
2138
1665
2139
# ObjectPath - property
2140
@dbus_annotations(
2141
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
2142
"org.freedesktop.DBus.Deprecated": "true"})
1666
2143
@dbus_service_property(_interface, signature="o", access="read")
1667
2144
def ObjectPath_dbus_property(self):
1668
return self.dbus_object_path # is already a dbus.ObjectPath
1669
2145
return self.dbus_object_path # is already a dbus.ObjectPath
2146
1670
2147
# Secret = property
2148
@dbus_annotations(
2149
{"org.freedesktop.DBus.Property.EmitsChangedSignal":
2150
"invalidates"})
1671
2151
@dbus_service_property(_interface,
1672
2152
signature="ay",
1673
2153
access="write",
1674
2154
byte_arrays=True)
1675
2155
def Secret_dbus_property(self, value):
1676
2156
self.secret = bytes(value)
1677
2157
1678
2158
del _interface
1679
2159
1680
2160
1684
2164
self._pipe.send(('init', fpr, address))
1685
2165
if not self._pipe.recv():
1686
2166
raise KeyError(fpr)
1687
2167
1688
2168
def __getattribute__(self, name):
1689
2169
if name == '_pipe':
1690
2170
return super(ProxyClient, self).__getattribute__(name)
1693
2173
if data[0] == 'data':
1694
2174
return data[1]
1695
2175
if data[0] == 'function':
1696
2176
1697
2177
def func(*args, **kwargs):
1698
2178
self._pipe.send(('funcall', name, args, kwargs))
1699
2179
return self._pipe.recv()[1]
1700
2180
1701
2181
return func
1702
2182
1703
2183
def __setattr__(self, name, value):
1704
2184
if name == '_pipe':
1705
2185
return super(ProxyClient, self).__setattr__(name, value)
1708
2188
1709
2189
class ClientHandler(socketserver.BaseRequestHandler, object):
1710
2190
"""A class to handle client connections.
1711
2191
1712
2192
Instantiated once for each connection to handle it.
1713
2193
Note: This will run in its own forked process."""
1714
2194
1715
2195
def handle(self):
1716
2196
with contextlib.closing(self.server.child_pipe) as child_pipe:
1717
2197
logger.info("TCP connection from: %s",
1718
2198
str(self.client_address))
1719
2199
logger.debug("Pipe FD: %d",
1720
2200
self.server.child_pipe.fileno())
1721
1722
session = gnutls.connection.ClientSession(
1723
self.request, gnutls.connection .X509Credentials())
1724
1725
# Note: gnutls.connection.X509Credentials is really a
1726
# generic GnuTLS certificate credentials object so long as
1727
# no X.509 keys are added to it. Therefore, we can use it
1728
# here despite using OpenPGP certificates.
1729
1730
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1731
# "+AES-256-CBC", "+SHA1",
1732
# "+COMP-NULL", "+CTYPE-OPENPGP",
1733
# "+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"))
1734
2208
# Use a fallback default, since this MUST be set.
1735
2209
priority = self.server.gnutls_priority
1736
2210
if priority is None:
1737
2211
priority = "NORMAL"
1738
gnutls.library.functions.gnutls_priority_set_direct(
1739
session._c_object, priority, None)
1740
2212
gnutls.priority_set_direct(session._c_object,
2213
priority.encode("utf-8"),
2214
None)
2215
1741
2216
# Start communication using the Mandos protocol
1742
2217
# Get protocol number
1743
2218
line = self.request.makefile().readline()
1748
2223
except (ValueError, IndexError, RuntimeError) as error:
1749
2224
logger.error("Unknown protocol version: %s", error)
1750
2225
return
1751
2226
1752
2227
# Start GnuTLS connection
1753
2228
try:
1754
2229
session.handshake()
1755
except gnutls.errors.GNUTLSError as error:
2230
except gnutls.Error as error:
1756
2231
logger.warning("Handshake failed: %s", error)
1757
2232
# Do not run session.bye() here: the session is not
1758
2233
# established. Just abandon the request.
1759
2234
return
1760
2235
logger.debug("Handshake succeeded")
1761
2236
1762
2237
approval_required = False
1763
2238
try:
1764
2239
try:
1765
2240
fpr = self.fingerprint(
1766
2241
self.peer_certificate(session))
1767
except (TypeError,
1768
gnutls.errors.GNUTLSError) as error:
2242
except (TypeError, gnutls.Error) as error:
1769
2243
logger.warning("Bad certificate: %s", error)
1770
2244
return
1771
2245
logger.debug("Fingerprint: %s", fpr)
1772
2246
1773
2247
try:
1774
2248
client = ProxyClient(child_pipe, fpr,
1775
2249
self.client_address)
1776
2250
except KeyError:
1777
2251
return
1778
2252
1779
2253
if client.approval_delay:
1780
2254
delay = client.approval_delay
1781
2255
client.approvals_pending += 1
1782
2256
approval_required = True
1783
2257
1784
2258
while True:
1785
2259
if not client.enabled:
1786
2260
logger.info("Client %s is disabled",
1789
2263
# Emit D-Bus signal
1790
2264
client.Rejected("Disabled")
1791
2265
return
1792
2266
1793
2267
if client.approved or not client.approval_delay:
1794
#We are approved or approval is disabled
2268
# We are approved or approval is disabled
1795
2269
break
1796
2270
elif client.approved is None:
1797
2271
logger.info("Client %s needs approval",
1808
2282
# Emit D-Bus signal
1809
2283
client.Rejected("Denied")
1810
2284
return
1811
1812
#wait until timeout or approved
2285
2286
# wait until timeout or approved
1813
2287
time = datetime.datetime.now()
1814
2288
client.changedstate.acquire()
1815
2289
client.changedstate.wait(delay.total_seconds())
1828
2302
break
1829
2303
else:
1830
2304
delay -= time2 - time
1831
1832
sent_size = 0
1833
while sent_size < len(client.secret):
1834
try:
1835
sent = session.send(client.secret[sent_size:])
1836
except gnutls.errors.GNUTLSError as error:
1837
logger.warning("gnutls send failed",
1838
exc_info=error)
1839
return
1840
logger.debug("Sent: %d, remaining: %d", sent,
1841
len(client.secret) - (sent_size
1842
+ sent))
1843
sent_size += sent
1844
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
1845
2313
logger.info("Sending secret to %s", client.name)
1846
2314
# bump the timeout using extended_timeout
1847
2315
client.bump_timeout(client.extended_timeout)
1848
2316
if self.server.use_dbus:
1849
2317
# Emit D-Bus signal
1850
2318
client.GotSecret()
1851
2319
1852
2320
finally:
1853
2321
if approval_required:
1854
2322
client.approvals_pending -= 1
1855
2323
try:
1856
2324
session.bye()
1857
except gnutls.errors.GNUTLSError as error:
2325
except gnutls.Error as error:
1858
2326
logger.warning("GnuTLS bye failed",
1859
2327
exc_info=error)
1860
2328
1861
2329
@staticmethod
1862
2330
def peer_certificate(session):
1863
2331
"Return the peer's OpenPGP certificate as a bytestring"
1864
2332
# If not an OpenPGP certificate...
1865
if (gnutls.library.functions.gnutls_certificate_type_get(
1866
session._c_object)
1867
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1868
# ...do the normal thing
1869
return session.peer_certificate
2333
if (gnutls.certificate_type_get(session._c_object)
2334
!= gnutls.CRT_OPENPGP):
2335
# ...return invalid data
2336
return b""
1870
2337
list_size = ctypes.c_uint(1)
1871
cert_list = (gnutls.library.functions
1872
.gnutls_certificate_get_peers
2338
cert_list = (gnutls.certificate_get_peers
1873
2339
(session._c_object, ctypes.byref(list_size)))
1874
2340
if not bool(cert_list) and list_size.value != 0:
1875
raise gnutls.errors.GNUTLSError("error getting peer"
1876
" certificate")
2341
raise gnutls.Error("error getting peer certificate")
1877
2342
if list_size.value == 0:
1878
2343
return None
1879
2344
cert = cert_list[0]
1880
2345
return ctypes.string_at(cert.data, cert.size)
1881
2346
1882
2347
@staticmethod
1883
2348
def fingerprint(openpgp):
1884
2349
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1885
2350
# New GnuTLS "datum" with the OpenPGP public key
1886
datum = gnutls.library.types.gnutls_datum_t(
2351
datum = gnutls.datum_t(
1887
2352
ctypes.cast(ctypes.c_char_p(openpgp),
1888
2353
ctypes.POINTER(ctypes.c_ubyte)),
1889
2354
ctypes.c_uint(len(openpgp)))
1890
2355
# New empty GnuTLS certificate
1891
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1892
gnutls.library.functions.gnutls_openpgp_crt_init(
1893
ctypes.byref(crt))
2356
crt = gnutls.openpgp_crt_t()
2357
gnutls.openpgp_crt_init(ctypes.byref(crt))
1894
2358
# Import the OpenPGP public key into the certificate
1895
gnutls.library.functions.gnutls_openpgp_crt_import(
1896
crt, ctypes.byref(datum),
1897
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
2359
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2360
gnutls.OPENPGP_FMT_RAW)
1898
2361
# Verify the self signature in the key
1899
2362
crtverify = ctypes.c_uint()
1900
gnutls.library.functions.gnutls_openpgp_crt_verify_self(
1901
crt, 0, ctypes.byref(crtverify))
2363
gnutls.openpgp_crt_verify_self(crt, 0,
2364
ctypes.byref(crtverify))
1902
2365
if crtverify.value != 0:
1903
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1904
raise gnutls.errors.CertificateSecurityError(
1905
"Verify failed")
2366
gnutls.openpgp_crt_deinit(crt)
2367
raise gnutls.CertificateSecurityError("Verify failed")
1906
2368
# New buffer for the fingerprint
1907
2369
buf = ctypes.create_string_buffer(20)
1908
2370
buf_len = ctypes.c_size_t()
1909
2371
# Get the fingerprint from the certificate into the buffer
1910
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint(
1911
crt, ctypes.byref(buf), ctypes.byref(buf_len))
2372
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2373
ctypes.byref(buf_len))
1912
2374
# Deinit the certificate
1913
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2375
gnutls.openpgp_crt_deinit(crt)
1914
2376
# Convert the buffer to a Python bytestring
1915
2377
fpr = ctypes.string_at(buf, buf_len.value)
1916
2378
# Convert the bytestring to hexadecimal notation
1920
2382
1921
2383
class MultiprocessingMixIn(object):
1922
2384
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1923
2385
1924
2386
def sub_process_main(self, request, address):
1925
2387
try:
1926
2388
self.finish_request(request, address)
1927
2389
except Exception:
1928
2390
self.handle_error(request, address)
1929
2391
self.close_request(request)
1930
2392
1931
2393
def process_request(self, request, address):
1932
2394
"""Start a new process to process the request."""
1933
proc = multiprocessing.Process(target = self.sub_process_main,
1934
args = (request, address))
2395
proc = multiprocessing.Process(target=self.sub_process_main,
2396
args=(request, address))
1935
2397
proc.start()
1936
2398
return proc
1937
2399
1938
2400
1939
2401
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1940
2402
""" adds a pipe to the MixIn """
1941
2403
1942
2404
def process_request(self, request, client_address):
1943
2405
"""Overrides and wraps the original process_request().
1944
2406
1945
2407
This function creates a new pipe in self.pipe
1946
2408
"""
1947
2409
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1948
2410
1949
2411
proc = MultiprocessingMixIn.process_request(self, request,
1950
2412
client_address)
1951
2413
self.child_pipe.close()
1952
2414
self.add_pipe(parent_pipe, proc)
1953
2415
1954
2416
def add_pipe(self, parent_pipe, proc):
1955
2417
"""Dummy function; override as necessary"""
1956
2418
raise NotImplementedError()
1959
2421
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1960
2422
socketserver.TCPServer, object):
1961
2423
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1962
2424
1963
2425
Attributes:
1964
2426
enabled: Boolean; whether this server is activated yet
1965
2427
interface: None or a network interface name (string)
1966
2428
use_ipv6: Boolean; to use IPv6 or not
1967
2429
"""
1968
2430
1969
2431
def __init__(self, server_address, RequestHandlerClass,
1970
2432
interface=None,
1971
2433
use_ipv6=True,
1981
2443
self.socketfd = socketfd
1982
2444
# Save the original socket.socket() function
1983
2445
self.socket_socket = socket.socket
2446
1984
2447
# To implement --socket, we monkey patch socket.socket.
1985
#
2448
#
1986
2449
# (When socketserver.TCPServer is a new-style class, we
1987
2450
# could make self.socket into a property instead of monkey
1988
2451
# patching socket.socket.)
1989
#
2452
#
1990
2453
# Create a one-time-only replacement for socket.socket()
1991
2454
@functools.wraps(socket.socket)
1992
2455
def socket_wrapper(*args, **kwargs):
2004
2467
# socket_wrapper(), if socketfd was set.
2005
2468
socketserver.TCPServer.__init__(self, server_address,
2006
2469
RequestHandlerClass)
2007
2470
2008
2471
def server_bind(self):
2009
2472
"""This overrides the normal server_bind() function
2010
2473
to bind to an interface if one was specified, and also NOT to
2011
2474
bind to an address or port if they were not specified."""
2475
global SO_BINDTODEVICE
2012
2476
if self.interface is not None:
2013
2477
if SO_BINDTODEVICE is None:
2014
logger.error("SO_BINDTODEVICE does not exist;"
2015
" cannot bind to interface %s",
2016
self.interface)
2017
else:
2018
try:
2019
self.socket.setsockopt(
2020
socket.SOL_SOCKET, SO_BINDTODEVICE,
2021
(self.interface + "\0").encode("utf-8"))
2022
except socket.error as error:
2023
if error.errno == errno.EPERM:
2024
logger.error("No permission to bind to"
2025
" interface %s", self.interface)
2026
elif error.errno == errno.ENOPROTOOPT:
2027
logger.error("SO_BINDTODEVICE not available;"
2028
" cannot bind to interface %s",
2029
self.interface)
2030
elif error.errno == errno.ENODEV:
2031
logger.error("Interface %s does not exist,"
2032
" cannot bind", self.interface)
2033
else:
2034
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
2035
2499
# Only bind(2) the socket if we really need to.
2036
2500
if self.server_address[0] or self.server_address[1]:
2037
2501
if not self.server_address[0]:
2038
2502
if self.address_family == socket.AF_INET6:
2039
any_address = "::" # in6addr_any
2503
any_address = "::" # in6addr_any
2040
2504
else:
2041
any_address = "0.0.0.0" # INADDR_ANY
2505
any_address = "0.0.0.0" # INADDR_ANY
2042
2506
self.server_address = (any_address,
2043
2507
self.server_address[1])
2044
2508
elif not self.server_address[1]:
2054
2518
2055
2519
class MandosServer(IPv6_TCPServer):
2056
2520
"""Mandos server.
2057
2521
2058
2522
Attributes:
2059
2523
clients: set of Client objects
2060
2524
gnutls_priority GnuTLS priority string
2061
2525
use_dbus: Boolean; to emit D-Bus signals or not
2062
2063
Assumes a gobject.MainLoop event loop.
2526
2527
Assumes a GLib.MainLoop event loop.
2064
2528
"""
2065
2529
2066
2530
def __init__(self, server_address, RequestHandlerClass,
2067
2531
interface=None,
2068
2532
use_ipv6=True,
2078
2542
self.gnutls_priority = gnutls_priority
2079
2543
IPv6_TCPServer.__init__(self, server_address,
2080
2544
RequestHandlerClass,
2081
interface = interface,
2082
use_ipv6 = use_ipv6,
2083
socketfd = socketfd)
2084
2545
interface=interface,
2546
use_ipv6=use_ipv6,
2547
socketfd=socketfd)
2548
2085
2549
def server_activate(self):
2086
2550
if self.enabled:
2087
2551
return socketserver.TCPServer.server_activate(self)
2088
2552
2089
2553
def enable(self):
2090
2554
self.enabled = True
2091
2555
2092
2556
def add_pipe(self, parent_pipe, proc):
2093
2557
# Call "handle_ipc" for both data and EOF events
2094
gobject.io_add_watch(
2558
GLib.io_add_watch(
2095
2559
parent_pipe.fileno(),
2096
gobject.IO_IN | gobject.IO_HUP,
2560
GLib.IO_IN | GLib.IO_HUP,
2097
2561
functools.partial(self.handle_ipc,
2098
parent_pipe = parent_pipe,
2099
proc = proc))
2100
2562
parent_pipe=parent_pipe,
2563
proc=proc))
2564
2101
2565
def handle_ipc(self, source, condition,
2102
2566
parent_pipe=None,
2103
proc = None,
2567
proc=None,
2104
2568
client_object=None):
2105
2569
# error, or the other end of multiprocessing.Pipe has closed
2106
if condition & (gobject.IO_ERR | gobject.IO_HUP):
2570
if condition & (GLib.IO_ERR | GLib.IO_HUP):
2107
2571
# Wait for other process to exit
2108
2572
proc.join()
2109
2573
return False
2110
2574
2111
2575
# Read a request from the child
2112
2576
request = parent_pipe.recv()
2113
2577
command = request[0]
2114
2578
2115
2579
if command == 'init':
2116
2580
fpr = request[1]
2117
2581
address = request[2]
2118
2119
for c in self.clients.itervalues():
2582
2583
for c in self.clients.values():
2120
2584
if c.fingerprint == fpr:
2121
2585
client = c
2122
2586
break
2129
2593
address[0])
2130
2594
parent_pipe.send(False)
2131
2595
return False
2132
2133
gobject.io_add_watch(
2596
2597
GLib.io_add_watch(
2134
2598
parent_pipe.fileno(),
2135
gobject.IO_IN | gobject.IO_HUP,
2599
GLib.IO_IN | GLib.IO_HUP,
2136
2600
functools.partial(self.handle_ipc,
2137
parent_pipe = parent_pipe,
2138
proc = proc,
2139
client_object = client))
2601
parent_pipe=parent_pipe,
2602
proc=proc,
2603
client_object=client))
2140
2604
parent_pipe.send(True)
2141
2605
# remove the old hook in favor of the new above hook on
2142
2606
# same fileno
2145
2609
funcname = request[1]
2146
2610
args = request[2]
2147
2611
kwargs = request[3]
2148
2612
2149
2613
parent_pipe.send(('data', getattr(client_object,
2150
2614
funcname)(*args,
2151
2615
**kwargs)))
2152
2616
2153
2617
if command == 'getattr':
2154
2618
attrname = request[1]
2155
2619
if isinstance(client_object.__getattribute__(attrname),
2158
2622
else:
2159
2623
parent_pipe.send((
2160
2624
'data', client_object.__getattribute__(attrname)))
2161
2625
2162
2626
if command == 'setattr':
2163
2627
attrname = request[1]
2164
2628
value = request[2]
2165
2629
setattr(client_object, attrname, value)
2166
2630
2167
2631
return True
2168
2632
2169
2633
2170
2634
def rfc3339_duration_to_delta(duration):
2171
2635
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2172
2636
2173
2637
>>> rfc3339_duration_to_delta("P7D")
2174
2638
datetime.timedelta(7)
2175
2639
>>> rfc3339_duration_to_delta("PT60S")
2185
2649
>>> rfc3339_duration_to_delta("P1DT3M20S")
2186
2650
datetime.timedelta(1, 200)
2187
2651
"""
2188
2652
2189
2653
# Parsing an RFC 3339 duration with regular expressions is not
2190
2654
# possible - there would have to be multiple places for the same
2191
2655
# values, like seconds. The current code, while more esoteric, is
2192
2656
# cleaner without depending on a parsing library. If Python had a
2193
2657
# built-in library for parsing we would use it, but we'd like to
2194
2658
# avoid excessive use of external libraries.
2195
2659
2196
2660
# New type for defining tokens, syntax, and semantics all-in-one
2197
2661
Token = collections.namedtuple("Token", (
2198
2662
"regexp", # To match token; if "value" is not None, must have
2231
2695
frozenset((token_year, token_month,
2232
2696
token_day, token_time,
2233
2697
token_week)))
2234
# Define starting values
2235
value = datetime.timedelta() # Value so far
2698
# Define starting values:
2699
# Value so far
2700
value = datetime.timedelta()
2236
2701
found_token = None
2237
followers = frozenset((token_duration, )) # Following valid tokens
2238
s = duration # String left to parse
2702
# Following valid tokens
2703
followers = frozenset((token_duration, ))
2704
# String left to parse
2705
s = duration
2239
2706
# Loop until end token is found
2240
2707
while found_token is not token_end:
2241
2708
# Search for any currently valid tokens
2265
2732
2266
2733
def string_to_delta(interval):
2267
2734
"""Parse a string and return a datetime.timedelta
2268
2735
2269
2736
>>> string_to_delta('7d')
2270
2737
datetime.timedelta(7)
2271
2738
>>> string_to_delta('60s')
2279
2746
>>> string_to_delta('5m 30s')
2280
2747
datetime.timedelta(0, 330)
2281
2748
"""
2282
2749
2283
2750
try:
2284
2751
return rfc3339_duration_to_delta(interval)
2285
2752
except ValueError:
2286
2753
pass
2287
2754
2288
2755
timevalue = datetime.timedelta(0)
2289
2756
for s in interval.split():
2290
2757
try:
2308
2775
return timevalue
2309
2776
2310
2777
2311
def daemon(nochdir = False, noclose = False):
2778
def daemon(nochdir=False, noclose=False):
2312
2779
"""See daemon(3). Standard BSD Unix function.
2313
2780
2314
2781
This should really exist as os.daemon, but it doesn't (yet)."""
2315
2782
if os.fork():
2316
2783
sys.exit()
2334
2801
2335
2802
2336
2803
def main():
2337
2804
2338
2805
##################################################################
2339
2806
# Parsing of options, both command line and config file
2340
2807
2341
2808
parser = argparse.ArgumentParser()
2342
2809
parser.add_argument("-v", "--version", action="version",
2343
version = "%(prog)s {}".format(version),
2810
version="%(prog)s {}".format(version),
2344
2811
help="show version number and exit")
2345
2812
parser.add_argument("-i", "--interface", metavar="IF",
2346
2813
help="Bind to interface IF")
2382
2849
parser.add_argument("--no-zeroconf", action="store_false",
2383
2850
dest="zeroconf", help="Do not use Zeroconf",
2384
2851
default=None)
2385
2852
2386
2853
options = parser.parse_args()
2387
2854
2388
2855
if options.check:
2389
2856
import doctest
2390
2857
fail_count, test_count = doctest.testmod()
2391
2858
sys.exit(os.EX_OK if fail_count == 0 else 1)
2392
2859
2393
2860
# Default values for config file for server-global settings
2394
server_defaults = { "interface": "",
2395
"address": "",
2396
"port": "",
2397
"debug": "False",
2398
"priority":
2399
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2400
":+SIGN-RSA-SHA224:+SIGN-RSA-RMD160",
2401
"servicename": "Mandos",
2402
"use_dbus": "True",
2403
"use_ipv6": "True",
2404
"debuglevel": "",
2405
"restore": "True",
2406
"socket": "",
2407
"statedir": "/var/lib/mandos",
2408
"foreground": "False",
2409
"zeroconf": "True",
2410
}
2411
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
2412
2879
# Parse config file for server-global settings
2413
2880
server_config = configparser.SafeConfigParser(server_defaults)
2414
2881
del server_defaults
2432
2899
server_settings["socket"] = os.dup(server_settings
2433
2900
["socket"])
2434
2901
del server_config
2435
2902
2436
2903
# Override the settings from the config file with command line
2437
2904
# options, if set.
2438
2905
for option in ("interface", "address", "port", "debug",
2456
2923
if server_settings["debug"]:
2457
2924
server_settings["foreground"] = True
2458
2925
# Now we have our good server settings in "server_settings"
2459
2926
2460
2927
##################################################################
2461
2928
2462
2929
if (not server_settings["zeroconf"]
2463
2930
and not (server_settings["port"]
2464
2931
or server_settings["socket"] != "")):
2465
2932
parser.error("Needs port or socket to work without Zeroconf")
2466
2933
2467
2934
# For convenience
2468
2935
debug = server_settings["debug"]
2469
2936
debuglevel = server_settings["debuglevel"]
2473
2940
stored_state_file)
2474
2941
foreground = server_settings["foreground"]
2475
2942
zeroconf = server_settings["zeroconf"]
2476
2943
2477
2944
if debug:
2478
2945
initlogger(debug, logging.DEBUG)
2479
2946
else:
2482
2949
else:
2483
2950
level = getattr(logging, debuglevel.upper())
2484
2951
initlogger(debug, level)
2485
2952
2486
2953
if server_settings["servicename"] != "Mandos":
2487
2954
syslogger.setFormatter(
2488
2955
logging.Formatter('Mandos ({}) [%(process)d]:'
2489
2956
' %(levelname)s: %(message)s'.format(
2490
2957
server_settings["servicename"])))
2491
2958
2492
2959
# Parse config file with clients
2493
2960
client_config = configparser.SafeConfigParser(Client
2494
2961
.client_defaults)
2495
2962
client_config.read(os.path.join(server_settings["configdir"],
2496
2963
"clients.conf"))
2497
2964
2498
2965
global mandos_dbus_service
2499
2966
mandos_dbus_service = None
2500
2967
2501
2968
socketfd = None
2502
2969
if server_settings["socket"] != "":
2503
2970
socketfd = server_settings["socket"]
2519
2986
except IOError as e:
2520
2987
logger.error("Could not open file %r", pidfilename,
2521
2988
exc_info=e)
2522
2523
for name in ("_mandos", "mandos", "nobody"):
2989
2990
for name, group in (("_mandos", "_mandos"),
2991
("mandos", "mandos"),
2992
("nobody", "nogroup")):
2524
2993
try:
2525
2994
uid = pwd.getpwnam(name).pw_uid
2526
gid = pwd.getpwnam(name).pw_gid
2995
gid = pwd.getpwnam(group).pw_gid
2527
2996
break
2528
2997
except KeyError:
2529
2998
continue
2533
3002
try:
2534
3003
os.setgid(gid)
2535
3004
os.setuid(uid)
3005
if debug:
3006
logger.debug("Did setuid/setgid to {}:{}".format(uid,
3007
gid))
2536
3008
except OSError as error:
3009
logger.warning("Failed to setuid/setgid to {}:{}: {}"
3010
.format(uid, gid, os.strerror(error.errno)))
2537
3011
if error.errno != errno.EPERM:
2538
3012
raise
2539
3013
2540
3014
if debug:
2541
3015
# Enable all possible GnuTLS debugging
2542
3016
2543
3017
# "Use a log level over 10 to enable all debugging options."
2544
3018
# - GnuTLS manual
2545
gnutls.library.functions.gnutls_global_set_log_level(11)
2546
2547
@gnutls.library.types.gnutls_log_func
3019
gnutls.global_set_log_level(11)
3020
3021
@gnutls.log_func
2548
3022
def debug_gnutls(level, string):
2549
3023
logger.debug("GnuTLS: %s", string[:-1])
2550
2551
gnutls.library.functions.gnutls_global_set_log_function(
2552
debug_gnutls)
2553
3024
3025
gnutls.global_set_log_function(debug_gnutls)
3026
2554
3027
# Redirect stdin so all checkers get /dev/null
2555
3028
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2556
3029
os.dup2(null, sys.stdin.fileno())
2557
3030
if null > 2:
2558
3031
os.close(null)
2559
3032
2560
3033
# Need to fork before connecting to D-Bus
2561
3034
if not foreground:
2562
3035
# Close all input and output, do double fork, etc.
2563
3036
daemon()
2564
2565
# multiprocessing will use threads, so before we use gobject we
2566
# need to inform gobject that threads will be used.
2567
gobject.threads_init()
2568
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
2569
3042
global main_loop
2570
3043
# From the Avahi example code
2571
3044
DBusGMainLoop(set_as_default=True)
2572
main_loop = gobject.MainLoop()
3045
main_loop = GLib.MainLoop()
2573
3046
bus = dbus.SystemBus()
2574
3047
# End of Avahi example code
2575
3048
if use_dbus:
2588
3061
if zeroconf:
2589
3062
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2590
3063
service = AvahiServiceToSyslog(
2591
name = server_settings["servicename"],
2592
servicetype = "_mandos._tcp",
2593
protocol = protocol,
2594
bus = bus)
3064
name=server_settings["servicename"],
3065
servicetype="_mandos._tcp",
3066
protocol=protocol,
3067
bus=bus)
2595
3068
if server_settings["interface"]:
2596
3069
service.interface = if_nametoindex(
2597
3070
server_settings["interface"].encode("utf-8"))
2598
3071
2599
3072
global multiprocessing_manager
2600
3073
multiprocessing_manager = multiprocessing.Manager()
2601
3074
2602
3075
client_class = Client
2603
3076
if use_dbus:
2604
client_class = functools.partial(ClientDBus, bus = bus)
2605
3077
client_class = functools.partial(ClientDBus, bus=bus)
3078
2606
3079
client_settings = Client.config_parser(client_config)
2607
3080
old_client_settings = {}
2608
3081
clients_data = {}
2609
3082
2610
3083
# This is used to redirect stdout and stderr for checker processes
2611
3084
global wnull
2612
wnull = open(os.devnull, "w") # A writable /dev/null
3085
wnull = open(os.devnull, "w") # A writable /dev/null
2613
3086
# Only used if server is running in foreground but not in debug
2614
3087
# mode
2615
3088
if debug or not foreground:
2616
3089
wnull.close()
2617
3090
2618
3091
# Get client data and settings from last running state.
2619
3092
if server_settings["restore"]:
2620
3093
try:
2621
3094
with open(stored_state_path, "rb") as stored_state:
2622
clients_data, old_client_settings = pickle.load(
2623
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"))
2624
3140
os.remove(stored_state_path)
2625
3141
except IOError as e:
2626
3142
if e.errno == errno.ENOENT:
2634
3150
logger.warning("Could not load persistent state: "
2635
3151
"EOFError:",
2636
3152
exc_info=e)
2637
3153
2638
3154
with PGPEngine() as pgp:
2639
3155
for client_name, client in clients_data.items():
2640
3156
# Skip removed clients
2641
3157
if client_name not in client_settings:
2642
3158
continue
2643
3159
2644
3160
# Decide which value to use after restoring saved state.
2645
3161
# We have three different values: Old config file,
2646
3162
# new config file, and saved state.
2657
3173
client[name] = value
2658
3174
except KeyError:
2659
3175
pass
2660
3176
2661
3177
# Clients who has passed its expire date can still be
2662
3178
# enabled if its last checker was successful. A Client
2663
3179
# whose checker succeeded before we stored its state is
2696
3212
client_name))
2697
3213
client["secret"] = (client_settings[client_name]
2698
3214
["secret"])
2699
3215
2700
3216
# Add/remove clients based on new changes made to config
2701
3217
for client_name in (set(old_client_settings)
2702
3218
- set(client_settings)):
2704
3220
for client_name in (set(client_settings)
2705
3221
- set(old_client_settings)):
2706
3222
clients_data[client_name] = client_settings[client_name]
2707
3223
2708
3224
# Create all client objects
2709
3225
for client_name, client in clients_data.items():
2710
3226
tcp_server.clients[client_name] = client_class(
2711
name = client_name,
2712
settings = client,
2713
server_settings = server_settings)
2714
3227
name=client_name,
3228
settings=client,
3229
server_settings=server_settings)
3230
2715
3231
if not tcp_server.clients:
2716
3232
logger.warning("No clients defined")
2717
3233
2718
3234
if not foreground:
2719
3235
if pidfile is not None:
2720
3236
pid = os.getpid()
2726
3242
pidfilename, pid)
2727
3243
del pidfile
2728
3244
del pidfilename
2729
2730
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2731
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2732
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
2733
3250
if use_dbus:
2734
3251
2735
3252
@alternate_dbus_interfaces(
2736
{ "se.recompile.Mandos": "se.bsnet.fukt.Mandos" })
2737
class MandosDBusService(DBusObjectWithProperties):
3253
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3254
class MandosDBusService(DBusObjectWithObjectManager):
2738
3255
"""A D-Bus proxy object"""
2739
3256
2740
3257
def __init__(self):
2741
3258
dbus.service.Object.__init__(self, bus, "/")
2742
3259
2743
3260
_interface = "se.recompile.Mandos"
2744
2745
@dbus_interface_annotations(_interface)
2746
def _foo(self):
2747
return {
2748
"org.freedesktop.DBus.Property.EmitsChangedSignal":
2749
"false" }
2750
3261
2751
3262
@dbus.service.signal(_interface, signature="o")
2752
3263
def ClientAdded(self, objpath):
2753
3264
"D-Bus signal"
2754
3265
pass
2755
3266
2756
3267
@dbus.service.signal(_interface, signature="ss")
2757
3268
def ClientNotFound(self, fingerprint, address):
2758
3269
"D-Bus signal"
2759
3270
pass
2760
3271
3272
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3273
"true"})
2761
3274
@dbus.service.signal(_interface, signature="os")
2762
3275
def ClientRemoved(self, objpath, name):
2763
3276
"D-Bus signal"
2764
3277
pass
2765
3278
3279
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3280
"true"})
2766
3281
@dbus.service.method(_interface, out_signature="ao")
2767
3282
def GetAllClients(self):
2768
3283
"D-Bus method"
2769
3284
return dbus.Array(c.dbus_object_path for c in
2770
tcp_server.clients.itervalues())
2771
3285
tcp_server.clients.values())
3286
3287
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3288
"true"})
2772
3289
@dbus.service.method(_interface,
2773
3290
out_signature="a{oa{sv}}")
2774
3291
def GetAllClientsWithProperties(self):
2775
3292
"D-Bus method"
2776
3293
return dbus.Dictionary(
2777
{ c.dbus_object_path: c.GetAll("")
2778
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()},
2779
3297
signature="oa{sv}")
2780
3298
2781
3299
@dbus.service.method(_interface, in_signature="o")
2782
3300
def RemoveClient(self, object_path):
2783
3301
"D-Bus method"
2784
for c in tcp_server.clients.itervalues():
3302
for c in tcp_server.clients.values():
2785
3303
if c.dbus_object_path == object_path:
2786
3304
del tcp_server.clients[c.name]
2787
3305
c.remove_from_connection()
2788
# Don't signal anything except ClientRemoved
3306
# Don't signal the disabling
2789
3307
c.disable(quiet=True)
2790
# Emit D-Bus signal
2791
self.ClientRemoved(object_path, c.name)
3308
# Emit D-Bus signal for removal
3309
self.client_removed_signal(c)
2792
3310
return
2793
3311
raise KeyError(object_path)
2794
3312
2795
3313
del _interface
2796
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
2797
3351
mandos_dbus_service = MandosDBusService()
2798
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
2799
3358
def cleanup():
2800
3359
"Cleanup function; run on exit"
2801
3360
if zeroconf:
2802
3361
service.cleanup()
2803
2804
multiprocessing.active_children()
2805
wnull.close()
3362
3363
mp.active_children()
3364
wn.close()
2806
3365
if not (tcp_server.clients or client_settings):
2807
3366
return
2808
3367
2809
3368
# Store client before exiting. Secrets are encrypted with key
2810
3369
# based on what config file has. If config file is
2811
3370
# removed/edited, old secret will thus be unrecovable.
2812
3371
clients = {}
2813
3372
with PGPEngine() as pgp:
2814
for client in tcp_server.clients.itervalues():
3373
for client in tcp_server.clients.values():
2815
3374
key = client_settings[client.name]["secret"]
2816
3375
client.encrypted_secret = pgp.encrypt(client.secret,
2817
3376
key)
2818
3377
client_dict = {}
2819
3378
2820
3379
# A list of attributes that can not be pickled
2821
3380
# + secret.
2822
exclude = { "bus", "changedstate", "secret",
2823
"checker", "server_settings" }
3381
exclude = {"bus", "changedstate", "secret",
3382
"checker", "server_settings"}
2824
3383
for name, typ in inspect.getmembers(dbus.service
2825
3384
.Object):
2826
3385
exclude.add(name)
2827
3386
2828
3387
client_dict["encrypted_secret"] = (client
2829
3388
.encrypted_secret)
2830
3389
for attr in client.client_structure:
2831
3390
if attr not in exclude:
2832
3391
client_dict[attr] = getattr(client, attr)
2833
3392
2834
3393
clients[client.name] = client_dict
2835
3394
del client_settings[client.name]["secret"]
2836
3395
2837
3396
try:
2838
3397
with tempfile.NamedTemporaryFile(
2839
3398
mode='wb',
2841
3400
prefix='clients-',
2842
3401
dir=os.path.dirname(stored_state_path),
2843
3402
delete=False) as stored_state:
2844
pickle.dump((clients, client_settings), stored_state)
3403
pickle.dump((clients, client_settings), stored_state,
3404
protocol=2)
2845
3405
tempname = stored_state.name
2846
3406
os.rename(tempname, stored_state_path)
2847
3407
except (IOError, OSError) as e:
2857
3417
logger.warning("Could not save persistent state:",
2858
3418
exc_info=e)
2859
3419
raise
2860
3420
2861
3421
# Delete all clients, and settings from config
2862
3422
while tcp_server.clients:
2863
3423
name, client = tcp_server.clients.popitem()
2864
3424
if use_dbus:
2865
3425
client.remove_from_connection()
2866
# Don't signal anything except ClientRemoved
3426
# Don't signal the disabling
2867
3427
client.disable(quiet=True)
3428
# Emit D-Bus signal for removal
2868
3429
if use_dbus:
2869
# Emit D-Bus signal
2870
mandos_dbus_service.ClientRemoved(
2871
client.dbus_object_path, client.name)
3430
mandos_dbus_service.client_removed_signal(client)
2872
3431
client_settings.clear()
2873
3432
2874
3433
atexit.register(cleanup)
2875
2876
for client in tcp_server.clients.itervalues():
3434
3435
for client in tcp_server.clients.values():
2877
3436
if use_dbus:
2878
# Emit D-Bus signal
2879
mandos_dbus_service.ClientAdded(client.dbus_object_path)
3437
# Emit D-Bus signal for adding
3438
mandos_dbus_service.client_added_signal(client)
2880
3439
# Need to initiate checking of clients
2881
3440
if client.enabled:
2882
3441
client.init_checker()
2883
3442
2884
3443
tcp_server.enable()
2885
3444
tcp_server.server_activate()
2886
3445
2887
3446
# Find out what port we got
2888
3447
if zeroconf:
2889
3448
service.port = tcp_server.socket.getsockname()[1]
2894
3453
else: # IPv4
2895
3454
logger.info("Now listening on address %r, port %d",
2896
3455
*tcp_server.socket.getsockname())
2897
2898
#service.interface = tcp_server.socket.getsockname()[3]
2899
3456
3457
# service.interface = tcp_server.socket.getsockname()[3]
3458
2900
3459
try:
2901
3460
if zeroconf:
2902
3461
# From the Avahi example code
2907
3466
cleanup()
2908
3467
sys.exit(1)
2909
3468
# End of Avahi example code
2910
2911
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2912
lambda *args, **kwargs:
2913
(tcp_server.handle_request
2914
(*args[2:], **kwargs) or True))
2915
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
2916
3475
logger.debug("Starting main loop")
2917
3476
main_loop.run()
2918
3477
except AvahiError as error:
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0