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- Committer: Teddy Hogeborn
- Date: 2018-02-22 18:50:12 UTC
- mto: This revision was merged to the branch mainline in revision 943.
- Revision ID: teddy@recompile.se-20180222185012-etchk537ast7s1xg
Tags: version-1.7.19-1
* Makefile (version): Change to 1.7.19.
* NEWS (Version 1.7.19): Add new entry.
* debian/changelog (1.7.19-1): - '' -
* NEWS (Version 1.7.19): Add new entry.
* debian/changelog (1.7.19-1): - '' -
- files added:
- bugs.xml
- debian/upstream
- plugin-helpers
- files modified:
- .bzrignore
added
removed
mandos
1
1
#!/usr/bin/python
2
2
# -*- mode: python; coding: utf-8 -*-
3
#
3
#
4
4
# Mandos server - give out binary blobs to connecting clients.
5
#
5
#
6
6
# This program is partly derived from an example program for an Avahi
7
7
# service publisher, downloaded from
8
8
# <http://avahi.org/wiki/PythonPublishExample>. This includes the
9
9
# methods "add", "remove", "server_state_changed",
10
10
# "entry_group_state_changed", "cleanup", and "activate" in the
11
11
# "AvahiService" class, and some lines in "main".
12
#
12
#
13
13
# Everything else is
14
# Copyright © 2008-2011 Teddy Hogeborn
15
# Copyright © 2008-2011 Björn Påhlsson
16
#
17
# This program is free software: you can redistribute it and/or modify
18
# it under the terms of the GNU General Public License as published by
14
# Copyright © 2008-2018 Teddy Hogeborn
15
# Copyright © 2008-2018 Björn Påhlsson
16
#
17
# This file is part of Mandos.
18
#
19
# Mandos is free software: you can redistribute it and/or modify it
20
# under the terms of the GNU General Public License as published by
19
21
# the Free Software Foundation, either version 3 of the License, or
20
22
# (at your option) any later version.
21
23
#
22
# This program is distributed in the hope that it will be useful,
23
# but WITHOUT ANY WARRANTY; without even the implied warranty of
24
# Mandos is distributed in the hope that it will be useful, but
25
# WITHOUT ANY WARRANTY; without even the implied warranty of
24
26
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
25
27
# GNU General Public License for more details.
26
#
28
#
27
29
# You should have received a copy of the GNU General Public License
28
# along with this program. If not, see
29
# <http://www.gnu.org/licenses/>.
30
#
30
# along with Mandos. If not, see <http://www.gnu.org/licenses/>.
31
#
31
32
# Contact the authors at <mandos@recompile.se>.
32
#
33
#
33
34
34
35
from __future__ import (division, absolute_import, print_function,
35
36
unicode_literals)
36
37
37
import SocketServer as socketserver
38
try:
39
from future_builtins import *
40
except ImportError:
41
pass
42
43
try:
44
import SocketServer as socketserver
45
except ImportError:
46
import socketserver
38
47
import socket
39
48
import argparse
40
49
import datetime
41
50
import errno
42
import gnutls.crypto
43
import gnutls.connection
44
import gnutls.errors
45
import gnutls.library.functions
46
import gnutls.library.constants
47
import gnutls.library.types
48
import ConfigParser as configparser
51
try:
52
import ConfigParser as configparser
53
except ImportError:
54
import configparser
49
55
import sys
50
56
import re
51
57
import os
60
66
import struct
61
67
import fcntl
62
68
import functools
63
import cPickle as pickle
69
try:
70
import cPickle as pickle
71
except ImportError:
72
import pickle
64
73
import multiprocessing
65
74
import types
75
import binascii
76
import tempfile
77
import itertools
78
import collections
79
import codecs
66
80
67
81
import dbus
68
82
import dbus.service
69
import gobject
70
import avahi
83
from gi.repository import GLib
71
84
from dbus.mainloop.glib import DBusGMainLoop
72
85
import ctypes
73
86
import ctypes.util
74
87
import xml.dom.minidom
75
88
import inspect
76
89
90
# Try to find the value of SO_BINDTODEVICE:
77
91
try:
92
# This is where SO_BINDTODEVICE is in Python 3.3 (or 3.4?) and
93
# newer, and it is also the most natural place for it:
78
94
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
79
95
except AttributeError:
80
96
try:
97
# This is where SO_BINDTODEVICE was up to and including Python
98
# 2.6, and also 3.2:
81
99
from IN import SO_BINDTODEVICE
82
100
except ImportError:
83
SO_BINDTODEVICE = None
84
85
86
version = "1.4.1"
87
88
#logger = logging.getLogger('mandos')
89
logger = logging.Logger('mandos')
90
syslogger = (logging.handlers.SysLogHandler
91
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
92
address = str("/dev/log")))
93
syslogger.setFormatter(logging.Formatter
94
('Mandos [%(process)d]: %(levelname)s:'
95
' %(message)s'))
96
logger.addHandler(syslogger)
97
98
console = logging.StreamHandler()
99
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
100
' %(levelname)s:'
101
' %(message)s'))
102
logger.addHandler(console)
101
# In Python 2.7 it seems to have been removed entirely.
102
# Try running the C preprocessor:
103
try:
104
cc = subprocess.Popen(["cc", "--language=c", "-E",
105
"/dev/stdin"],
106
stdin=subprocess.PIPE,
107
stdout=subprocess.PIPE)
108
stdout = cc.communicate(
109
"#include <sys/socket.h>\nSO_BINDTODEVICE\n")[0]
110
SO_BINDTODEVICE = int(stdout.splitlines()[-1])
111
except (OSError, ValueError, IndexError):
112
# No value found
113
SO_BINDTODEVICE = None
114
115
if sys.version_info.major == 2:
116
str = unicode
117
118
version = "1.7.19"
119
stored_state_file = "clients.pickle"
120
121
logger = logging.getLogger()
122
syslogger = None
123
124
try:
125
if_nametoindex = ctypes.cdll.LoadLibrary(
126
ctypes.util.find_library("c")).if_nametoindex
127
except (OSError, AttributeError):
128
129
def if_nametoindex(interface):
130
"Get an interface index the hard way, i.e. using fcntl()"
131
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
132
with contextlib.closing(socket.socket()) as s:
133
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
134
struct.pack(b"16s16x", interface))
135
interface_index = struct.unpack("I", ifreq[16:20])[0]
136
return interface_index
137
138
139
def copy_function(func):
140
"""Make a copy of a function"""
141
if sys.version_info.major == 2:
142
return types.FunctionType(func.func_code,
143
func.func_globals,
144
func.func_name,
145
func.func_defaults,
146
func.func_closure)
147
else:
148
return types.FunctionType(func.__code__,
149
func.__globals__,
150
func.__name__,
151
func.__defaults__,
152
func.__closure__)
153
154
155
def initlogger(debug, level=logging.WARNING):
156
"""init logger and add loglevel"""
157
158
global syslogger
159
syslogger = (logging.handlers.SysLogHandler(
160
facility=logging.handlers.SysLogHandler.LOG_DAEMON,
161
address="/dev/log"))
162
syslogger.setFormatter(logging.Formatter
163
('Mandos [%(process)d]: %(levelname)s:'
164
' %(message)s'))
165
logger.addHandler(syslogger)
166
167
if debug:
168
console = logging.StreamHandler()
169
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
170
' [%(process)d]:'
171
' %(levelname)s:'
172
' %(message)s'))
173
logger.addHandler(console)
174
logger.setLevel(level)
175
176
177
class PGPError(Exception):
178
"""Exception if encryption/decryption fails"""
179
pass
180
181
182
class PGPEngine(object):
183
"""A simple class for OpenPGP symmetric encryption & decryption"""
184
185
def __init__(self):
186
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
187
self.gpg = "gpg"
188
try:
189
output = subprocess.check_output(["gpgconf"])
190
for line in output.splitlines():
191
name, text, path = line.split(b":")
192
if name == "gpg":
193
self.gpg = path
194
break
195
except OSError as e:
196
if e.errno != errno.ENOENT:
197
raise
198
self.gnupgargs = ['--batch',
199
'--homedir', self.tempdir,
200
'--force-mdc',
201
'--quiet']
202
# Only GPG version 1 has the --no-use-agent option.
203
if self.gpg == "gpg" or self.gpg.endswith("/gpg"):
204
self.gnupgargs.append("--no-use-agent")
205
206
def __enter__(self):
207
return self
208
209
def __exit__(self, exc_type, exc_value, traceback):
210
self._cleanup()
211
return False
212
213
def __del__(self):
214
self._cleanup()
215
216
def _cleanup(self):
217
if self.tempdir is not None:
218
# Delete contents of tempdir
219
for root, dirs, files in os.walk(self.tempdir,
220
topdown=False):
221
for filename in files:
222
os.remove(os.path.join(root, filename))
223
for dirname in dirs:
224
os.rmdir(os.path.join(root, dirname))
225
# Remove tempdir
226
os.rmdir(self.tempdir)
227
self.tempdir = None
228
229
def password_encode(self, password):
230
# Passphrase can not be empty and can not contain newlines or
231
# NUL bytes. So we prefix it and hex encode it.
232
encoded = b"mandos" + binascii.hexlify(password)
233
if len(encoded) > 2048:
234
# GnuPG can't handle long passwords, so encode differently
235
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
236
.replace(b"\n", b"\\n")
237
.replace(b"\0", b"\\x00"))
238
return encoded
239
240
def encrypt(self, data, password):
241
passphrase = self.password_encode(password)
242
with tempfile.NamedTemporaryFile(
243
dir=self.tempdir) as passfile:
244
passfile.write(passphrase)
245
passfile.flush()
246
proc = subprocess.Popen([self.gpg, '--symmetric',
247
'--passphrase-file',
248
passfile.name]
249
+ self.gnupgargs,
250
stdin=subprocess.PIPE,
251
stdout=subprocess.PIPE,
252
stderr=subprocess.PIPE)
253
ciphertext, err = proc.communicate(input=data)
254
if proc.returncode != 0:
255
raise PGPError(err)
256
return ciphertext
257
258
def decrypt(self, data, password):
259
passphrase = self.password_encode(password)
260
with tempfile.NamedTemporaryFile(
261
dir=self.tempdir) as passfile:
262
passfile.write(passphrase)
263
passfile.flush()
264
proc = subprocess.Popen([self.gpg, '--decrypt',
265
'--passphrase-file',
266
passfile.name]
267
+ self.gnupgargs,
268
stdin=subprocess.PIPE,
269
stdout=subprocess.PIPE,
270
stderr=subprocess.PIPE)
271
decrypted_plaintext, err = proc.communicate(input=data)
272
if proc.returncode != 0:
273
raise PGPError(err)
274
return decrypted_plaintext
275
276
277
# Pretend that we have an Avahi module
278
class Avahi(object):
279
"""This isn't so much a class as it is a module-like namespace.
280
It is instantiated once, and simulates having an Avahi module."""
281
IF_UNSPEC = -1 # avahi-common/address.h
282
PROTO_UNSPEC = -1 # avahi-common/address.h
283
PROTO_INET = 0 # avahi-common/address.h
284
PROTO_INET6 = 1 # avahi-common/address.h
285
DBUS_NAME = "org.freedesktop.Avahi"
286
DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"
287
DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"
288
DBUS_PATH_SERVER = "/"
289
290
def string_array_to_txt_array(self, t):
291
return dbus.Array((dbus.ByteArray(s.encode("utf-8"))
292
for s in t), signature="ay")
293
ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h
294
ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h
295
ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h
296
SERVER_INVALID = 0 # avahi-common/defs.h
297
SERVER_REGISTERING = 1 # avahi-common/defs.h
298
SERVER_RUNNING = 2 # avahi-common/defs.h
299
SERVER_COLLISION = 3 # avahi-common/defs.h
300
SERVER_FAILURE = 4 # avahi-common/defs.h
301
avahi = Avahi()
302
103
303
104
304
class AvahiError(Exception):
105
305
def __init__(self, value, *args, **kwargs):
106
306
self.value = value
107
super(AvahiError, self).__init__(value, *args, **kwargs)
108
def __unicode__(self):
109
return unicode(repr(self.value))
307
return super(AvahiError, self).__init__(value, *args,
308
**kwargs)
309
110
310
111
311
class AvahiServiceError(AvahiError):
112
312
pass
113
313
314
114
315
class AvahiGroupError(AvahiError):
115
316
pass
116
317
117
318
118
319
class AvahiService(object):
119
320
"""An Avahi (Zeroconf) service.
120
321
121
322
Attributes:
122
323
interface: integer; avahi.IF_UNSPEC or an interface index.
123
324
Used to optionally bind to the specified interface.
124
325
name: string; Example: 'Mandos'
125
326
type: string; Example: '_mandos._tcp'.
126
See <http://www.dns-sd.org/ServiceTypes.html>
327
See <https://www.iana.org/assignments/service-names-port-numbers>
127
328
port: integer; what port to announce
128
329
TXT: list of strings; TXT record for the service
129
330
domain: string; Domain to publish on, default to .local if empty.
135
336
server: D-Bus Server
136
337
bus: dbus.SystemBus()
137
338
"""
138
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
139
servicetype = None, port = None, TXT = None,
140
domain = "", host = "", max_renames = 32768,
141
protocol = avahi.PROTO_UNSPEC, bus = None):
339
340
def __init__(self,
341
interface=avahi.IF_UNSPEC,
342
name=None,
343
servicetype=None,
344
port=None,
345
TXT=None,
346
domain="",
347
host="",
348
max_renames=32768,
349
protocol=avahi.PROTO_UNSPEC,
350
bus=None):
142
351
self.interface = interface
143
352
self.name = name
144
353
self.type = servicetype
153
362
self.server = None
154
363
self.bus = bus
155
364
self.entry_group_state_changed_match = None
156
def rename(self):
365
366
def rename(self, remove=True):
157
367
"""Derived from the Avahi example code"""
158
368
if self.rename_count >= self.max_renames:
159
369
logger.critical("No suitable Zeroconf service name found"
160
370
" after %i retries, exiting.",
161
371
self.rename_count)
162
372
raise AvahiServiceError("Too many renames")
163
self.name = unicode(self.server
164
.GetAlternativeServiceName(self.name))
373
self.name = str(
374
self.server.GetAlternativeServiceName(self.name))
375
self.rename_count += 1
165
376
logger.info("Changing Zeroconf service name to %r ...",
166
377
self.name)
167
syslogger.setFormatter(logging.Formatter
168
('Mandos (%s) [%%(process)d]:'
169
' %%(levelname)s: %%(message)s'
170
% self.name))
171
self.remove()
378
if remove:
379
self.remove()
172
380
try:
173
381
self.add()
174
382
except dbus.exceptions.DBusException as error:
175
logger.critical("DBusException: %s", error)
176
self.cleanup()
177
os._exit(1)
178
self.rename_count += 1
383
if (error.get_dbus_name()
384
== "org.freedesktop.Avahi.CollisionError"):
385
logger.info("Local Zeroconf service name collision.")
386
return self.rename(remove=False)
387
else:
388
logger.critical("D-Bus Exception", exc_info=error)
389
self.cleanup()
390
os._exit(1)
391
179
392
def remove(self):
180
393
"""Derived from the Avahi example code"""
181
394
if self.entry_group_state_changed_match is not None:
183
396
self.entry_group_state_changed_match = None
184
397
if self.group is not None:
185
398
self.group.Reset()
399
186
400
def add(self):
187
401
"""Derived from the Avahi example code"""
188
402
self.remove()
193
407
avahi.DBUS_INTERFACE_ENTRY_GROUP)
194
408
self.entry_group_state_changed_match = (
195
409
self.group.connect_to_signal(
196
'StateChanged', self .entry_group_state_changed))
410
'StateChanged', self.entry_group_state_changed))
197
411
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
198
412
self.name, self.type)
199
413
self.group.AddService(
205
419
dbus.UInt16(self.port),
206
420
avahi.string_array_to_txt_array(self.TXT))
207
421
self.group.Commit()
422
208
423
def entry_group_state_changed(self, state, error):
209
424
"""Derived from the Avahi example code"""
210
425
logger.debug("Avahi entry group state change: %i", state)
211
426
212
427
if state == avahi.ENTRY_GROUP_ESTABLISHED:
213
428
logger.debug("Zeroconf service established.")
214
429
elif state == avahi.ENTRY_GROUP_COLLISION:
216
431
self.rename()
217
432
elif state == avahi.ENTRY_GROUP_FAILURE:
218
433
logger.critical("Avahi: Error in group state changed %s",
219
unicode(error))
220
raise AvahiGroupError("State changed: %s"
221
% unicode(error))
434
str(error))
435
raise AvahiGroupError("State changed: {!s}".format(error))
436
222
437
def cleanup(self):
223
438
"""Derived from the Avahi example code"""
224
439
if self.group is not None:
225
440
try:
226
441
self.group.Free()
227
442
except (dbus.exceptions.UnknownMethodException,
228
dbus.exceptions.DBusException) as e:
443
dbus.exceptions.DBusException):
229
444
pass
230
445
self.group = None
231
446
self.remove()
447
232
448
def server_state_changed(self, state, error=None):
233
449
"""Derived from the Avahi example code"""
234
450
logger.debug("Avahi server state change: %i", state)
235
bad_states = { avahi.SERVER_INVALID:
236
"Zeroconf server invalid",
237
avahi.SERVER_REGISTERING: None,
238
avahi.SERVER_COLLISION:
239
"Zeroconf server name collision",
240
avahi.SERVER_FAILURE:
241
"Zeroconf server failure" }
451
bad_states = {
452
avahi.SERVER_INVALID: "Zeroconf server invalid",
453
avahi.SERVER_REGISTERING: None,
454
avahi.SERVER_COLLISION: "Zeroconf server name collision",
455
avahi.SERVER_FAILURE: "Zeroconf server failure",
456
}
242
457
if state in bad_states:
243
458
if bad_states[state] is not None:
244
459
if error is None:
247
462
logger.error(bad_states[state] + ": %r", error)
248
463
self.cleanup()
249
464
elif state == avahi.SERVER_RUNNING:
250
self.add()
465
try:
466
self.add()
467
except dbus.exceptions.DBusException as error:
468
if (error.get_dbus_name()
469
== "org.freedesktop.Avahi.CollisionError"):
470
logger.info("Local Zeroconf service name"
471
" collision.")
472
return self.rename(remove=False)
473
else:
474
logger.critical("D-Bus Exception", exc_info=error)
475
self.cleanup()
476
os._exit(1)
251
477
else:
252
478
if error is None:
253
479
logger.debug("Unknown state: %r", state)
254
480
else:
255
481
logger.debug("Unknown state: %r: %r", state, error)
482
256
483
def activate(self):
257
484
"""Derived from the Avahi example code"""
258
485
if self.server is None:
262
489
follow_name_owner_changes=True),
263
490
avahi.DBUS_INTERFACE_SERVER)
264
491
self.server.connect_to_signal("StateChanged",
265
self.server_state_changed)
492
self.server_state_changed)
266
493
self.server_state_changed(self.server.GetState())
267
494
268
495
269
def _timedelta_to_milliseconds(td):
270
"Convert a datetime.timedelta() to milliseconds"
271
return ((td.days * 24 * 60 * 60 * 1000)
272
+ (td.seconds * 1000)
273
+ (td.microseconds // 1000))
274
496
class AvahiServiceToSyslog(AvahiService):
497
def rename(self, *args, **kwargs):
498
"""Add the new name to the syslog messages"""
499
ret = super(AvahiServiceToSyslog, self).rename(*args, **kwargs)
500
syslogger.setFormatter(logging.Formatter(
501
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
502
.format(self.name)))
503
return ret
504
505
506
# Pretend that we have a GnuTLS module
507
class GnuTLS(object):
508
"""This isn't so much a class as it is a module-like namespace.
509
It is instantiated once, and simulates having a GnuTLS module."""
510
511
library = ctypes.util.find_library("gnutls")
512
if library is None:
513
library = ctypes.util.find_library("gnutls-deb0")
514
_library = ctypes.cdll.LoadLibrary(library)
515
del library
516
_need_version = b"3.3.0"
517
518
def __init__(self):
519
# Need to use "self" here, since this method is called before
520
# the assignment to the "gnutls" global variable happens.
521
if self.check_version(self._need_version) is None:
522
raise self.Error("Needs GnuTLS {} or later"
523
.format(self._need_version))
524
525
# Unless otherwise indicated, the constants and types below are
526
# all from the gnutls/gnutls.h C header file.
527
528
# Constants
529
E_SUCCESS = 0
530
E_INTERRUPTED = -52
531
E_AGAIN = -28
532
CRT_OPENPGP = 2
533
CLIENT = 2
534
SHUT_RDWR = 0
535
CRD_CERTIFICATE = 1
536
E_NO_CERTIFICATE_FOUND = -49
537
OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
538
539
# Types
540
class session_int(ctypes.Structure):
541
_fields_ = []
542
session_t = ctypes.POINTER(session_int)
543
544
class certificate_credentials_st(ctypes.Structure):
545
_fields_ = []
546
certificate_credentials_t = ctypes.POINTER(
547
certificate_credentials_st)
548
certificate_type_t = ctypes.c_int
549
550
class datum_t(ctypes.Structure):
551
_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
552
('size', ctypes.c_uint)]
553
554
class openpgp_crt_int(ctypes.Structure):
555
_fields_ = []
556
openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
557
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
558
log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
559
credentials_type_t = ctypes.c_int
560
transport_ptr_t = ctypes.c_void_p
561
close_request_t = ctypes.c_int
562
563
# Exceptions
564
class Error(Exception):
565
# We need to use the class name "GnuTLS" here, since this
566
# exception might be raised from within GnuTLS.__init__,
567
# which is called before the assignment to the "gnutls"
568
# global variable has happened.
569
def __init__(self, message=None, code=None, args=()):
570
# Default usage is by a message string, but if a return
571
# code is passed, convert it to a string with
572
# gnutls.strerror()
573
self.code = code
574
if message is None and code is not None:
575
message = GnuTLS.strerror(code)
576
return super(GnuTLS.Error, self).__init__(
577
message, *args)
578
579
class CertificateSecurityError(Error):
580
pass
581
582
# Classes
583
class Credentials(object):
584
def __init__(self):
585
self._c_object = gnutls.certificate_credentials_t()
586
gnutls.certificate_allocate_credentials(
587
ctypes.byref(self._c_object))
588
self.type = gnutls.CRD_CERTIFICATE
589
590
def __del__(self):
591
gnutls.certificate_free_credentials(self._c_object)
592
593
class ClientSession(object):
594
def __init__(self, socket, credentials=None):
595
self._c_object = gnutls.session_t()
596
gnutls.init(ctypes.byref(self._c_object), gnutls.CLIENT)
597
gnutls.set_default_priority(self._c_object)
598
gnutls.transport_set_ptr(self._c_object, socket.fileno())
599
gnutls.handshake_set_private_extensions(self._c_object,
600
True)
601
self.socket = socket
602
if credentials is None:
603
credentials = gnutls.Credentials()
604
gnutls.credentials_set(self._c_object, credentials.type,
605
ctypes.cast(credentials._c_object,
606
ctypes.c_void_p))
607
self.credentials = credentials
608
609
def __del__(self):
610
gnutls.deinit(self._c_object)
611
612
def handshake(self):
613
return gnutls.handshake(self._c_object)
614
615
def send(self, data):
616
data = bytes(data)
617
data_len = len(data)
618
while data_len > 0:
619
data_len -= gnutls.record_send(self._c_object,
620
data[-data_len:],
621
data_len)
622
623
def bye(self):
624
return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
625
626
# Error handling functions
627
def _error_code(result):
628
"""A function to raise exceptions on errors, suitable
629
for the 'restype' attribute on ctypes functions"""
630
if result >= 0:
631
return result
632
if result == gnutls.E_NO_CERTIFICATE_FOUND:
633
raise gnutls.CertificateSecurityError(code=result)
634
raise gnutls.Error(code=result)
635
636
def _retry_on_error(result, func, arguments):
637
"""A function to retry on some errors, suitable
638
for the 'errcheck' attribute on ctypes functions"""
639
while result < 0:
640
if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
641
return _error_code(result)
642
result = func(*arguments)
643
return result
644
645
# Unless otherwise indicated, the function declarations below are
646
# all from the gnutls/gnutls.h C header file.
647
648
# Functions
649
priority_set_direct = _library.gnutls_priority_set_direct
650
priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
651
ctypes.POINTER(ctypes.c_char_p)]
652
priority_set_direct.restype = _error_code
653
654
init = _library.gnutls_init
655
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
656
init.restype = _error_code
657
658
set_default_priority = _library.gnutls_set_default_priority
659
set_default_priority.argtypes = [session_t]
660
set_default_priority.restype = _error_code
661
662
record_send = _library.gnutls_record_send
663
record_send.argtypes = [session_t, ctypes.c_void_p,
664
ctypes.c_size_t]
665
record_send.restype = ctypes.c_ssize_t
666
record_send.errcheck = _retry_on_error
667
668
certificate_allocate_credentials = (
669
_library.gnutls_certificate_allocate_credentials)
670
certificate_allocate_credentials.argtypes = [
671
ctypes.POINTER(certificate_credentials_t)]
672
certificate_allocate_credentials.restype = _error_code
673
674
certificate_free_credentials = (
675
_library.gnutls_certificate_free_credentials)
676
certificate_free_credentials.argtypes = [
677
certificate_credentials_t]
678
certificate_free_credentials.restype = None
679
680
handshake_set_private_extensions = (
681
_library.gnutls_handshake_set_private_extensions)
682
handshake_set_private_extensions.argtypes = [session_t,
683
ctypes.c_int]
684
handshake_set_private_extensions.restype = None
685
686
credentials_set = _library.gnutls_credentials_set
687
credentials_set.argtypes = [session_t, credentials_type_t,
688
ctypes.c_void_p]
689
credentials_set.restype = _error_code
690
691
strerror = _library.gnutls_strerror
692
strerror.argtypes = [ctypes.c_int]
693
strerror.restype = ctypes.c_char_p
694
695
certificate_type_get = _library.gnutls_certificate_type_get
696
certificate_type_get.argtypes = [session_t]
697
certificate_type_get.restype = _error_code
698
699
certificate_get_peers = _library.gnutls_certificate_get_peers
700
certificate_get_peers.argtypes = [session_t,
701
ctypes.POINTER(ctypes.c_uint)]
702
certificate_get_peers.restype = ctypes.POINTER(datum_t)
703
704
global_set_log_level = _library.gnutls_global_set_log_level
705
global_set_log_level.argtypes = [ctypes.c_int]
706
global_set_log_level.restype = None
707
708
global_set_log_function = _library.gnutls_global_set_log_function
709
global_set_log_function.argtypes = [log_func]
710
global_set_log_function.restype = None
711
712
deinit = _library.gnutls_deinit
713
deinit.argtypes = [session_t]
714
deinit.restype = None
715
716
handshake = _library.gnutls_handshake
717
handshake.argtypes = [session_t]
718
handshake.restype = _error_code
719
handshake.errcheck = _retry_on_error
720
721
transport_set_ptr = _library.gnutls_transport_set_ptr
722
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
723
transport_set_ptr.restype = None
724
725
bye = _library.gnutls_bye
726
bye.argtypes = [session_t, close_request_t]
727
bye.restype = _error_code
728
bye.errcheck = _retry_on_error
729
730
check_version = _library.gnutls_check_version
731
check_version.argtypes = [ctypes.c_char_p]
732
check_version.restype = ctypes.c_char_p
733
734
# All the function declarations below are from gnutls/openpgp.h
735
736
openpgp_crt_init = _library.gnutls_openpgp_crt_init
737
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
738
openpgp_crt_init.restype = _error_code
739
740
openpgp_crt_import = _library.gnutls_openpgp_crt_import
741
openpgp_crt_import.argtypes = [openpgp_crt_t,
742
ctypes.POINTER(datum_t),
743
openpgp_crt_fmt_t]
744
openpgp_crt_import.restype = _error_code
745
746
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
747
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
748
ctypes.POINTER(ctypes.c_uint)]
749
openpgp_crt_verify_self.restype = _error_code
750
751
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
752
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
753
openpgp_crt_deinit.restype = None
754
755
openpgp_crt_get_fingerprint = (
756
_library.gnutls_openpgp_crt_get_fingerprint)
757
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
758
ctypes.c_void_p,
759
ctypes.POINTER(
760
ctypes.c_size_t)]
761
openpgp_crt_get_fingerprint.restype = _error_code
762
763
# Remove non-public functions
764
del _error_code, _retry_on_error
765
# Create the global "gnutls" object, simulating a module
766
gnutls = GnuTLS()
767
768
769
def call_pipe(connection, # : multiprocessing.Connection
770
func, *args, **kwargs):
771
"""This function is meant to be called by multiprocessing.Process
772
773
This function runs func(*args, **kwargs), and writes the resulting
774
return value on the provided multiprocessing.Connection.
775
"""
776
connection.send(func(*args, **kwargs))
777
connection.close()
778
779
275
780
class Client(object):
276
781
"""A representation of a client host served by this server.
277
782
278
783
Attributes:
279
_approved: bool(); 'None' if not yet approved/disapproved
784
approved: bool(); 'None' if not yet approved/disapproved
280
785
approval_delay: datetime.timedelta(); Time to wait for approval
281
786
approval_duration: datetime.timedelta(); Duration of one approval
282
787
checker: subprocess.Popen(); a running checker process used
283
788
to see if the client lives.
284
789
'None' if no process is running.
285
checker_callback_tag: a gobject event source tag, or None
790
checker_callback_tag: a GLib event source tag, or None
286
791
checker_command: string; External command which is run to check
287
792
if client lives. %() expansions are done at
288
793
runtime with vars(self) as dict, so that for
289
794
instance %(name)s can be used in the command.
290
checker_initiator_tag: a gobject event source tag, or None
795
checker_initiator_tag: a GLib event source tag, or None
291
796
created: datetime.datetime(); (UTC) object creation
797
client_structure: Object describing what attributes a client has
798
and is used for storing the client at exit
292
799
current_checker_command: string; current running checker_command
293
disable_hook: If set, called by disable() as disable_hook(self)
294
disable_initiator_tag: a gobject event source tag, or None
800
disable_initiator_tag: a GLib event source tag, or None
295
801
enabled: bool()
296
802
fingerprint: string (40 or 32 hexadecimal digits); used to
297
803
uniquely identify the client
299
805
interval: datetime.timedelta(); How often to start a new checker
300
806
last_approval_request: datetime.datetime(); (UTC) or None
301
807
last_checked_ok: datetime.datetime(); (UTC) or None
302
last_enabled: datetime.datetime(); (UTC)
808
last_checker_status: integer between 0 and 255 reflecting exit
809
status of last checker. -1 reflects crashed
810
checker, -2 means no checker completed yet.
811
last_checker_signal: The signal which killed the last checker, if
812
last_checker_status is -1
813
last_enabled: datetime.datetime(); (UTC) or None
303
814
name: string; from the config file, used in log messages and
304
815
D-Bus identifiers
305
816
secret: bytestring; sent verbatim (over TLS) to client
306
817
timeout: datetime.timedelta(); How long from last_checked_ok
307
818
until this client is disabled
308
extended_timeout: extra long timeout when password has been sent
819
extended_timeout: extra long timeout when secret has been sent
309
820
runtime_expansions: Allowed attributes for runtime expansion.
310
821
expires: datetime.datetime(); time (UTC) when a client will be
311
822
disabled, or None
823
server_settings: The server_settings dict from main()
312
824
"""
313
825
314
826
runtime_expansions = ("approval_delay", "approval_duration",
315
"created", "enabled", "fingerprint",
316
"host", "interval", "last_checked_ok",
827
"created", "enabled", "expires",
828
"fingerprint", "host", "interval",
829
"last_approval_request", "last_checked_ok",
317
830
"last_enabled", "name", "timeout")
318
319
def timeout_milliseconds(self):
320
"Return the 'timeout' attribute in milliseconds"
321
return _timedelta_to_milliseconds(self.timeout)
322
323
def extended_timeout_milliseconds(self):
324
"Return the 'extended_timeout' attribute in milliseconds"
325
return _timedelta_to_milliseconds(self.extended_timeout)
326
327
def interval_milliseconds(self):
328
"Return the 'interval' attribute in milliseconds"
329
return _timedelta_to_milliseconds(self.interval)
330
331
def approval_delay_milliseconds(self):
332
return _timedelta_to_milliseconds(self.approval_delay)
333
334
def __init__(self, name = None, disable_hook=None, config=None):
335
"""Note: the 'checker' key in 'config' sets the
336
'checker_command' attribute and *not* the 'checker'
337
attribute."""
831
client_defaults = {
832
"timeout": "PT5M",
833
"extended_timeout": "PT15M",
834
"interval": "PT2M",
835
"checker": "fping -q -- %%(host)s",
836
"host": "",
837
"approval_delay": "PT0S",
838
"approval_duration": "PT1S",
839
"approved_by_default": "True",
840
"enabled": "True",
841
}
842
843
@staticmethod
844
def config_parser(config):
845
"""Construct a new dict of client settings of this form:
846
{ client_name: {setting_name: value, ...}, ...}
847
with exceptions for any special settings as defined above.
848
NOTE: Must be a pure function. Must return the same result
849
value given the same arguments.
850
"""
851
settings = {}
852
for client_name in config.sections():
853
section = dict(config.items(client_name))
854
client = settings[client_name] = {}
855
856
client["host"] = section["host"]
857
# Reformat values from string types to Python types
858
client["approved_by_default"] = config.getboolean(
859
client_name, "approved_by_default")
860
client["enabled"] = config.getboolean(client_name,
861
"enabled")
862
863
# Uppercase and remove spaces from fingerprint for later
864
# comparison purposes with return value from the
865
# fingerprint() function
866
client["fingerprint"] = (section["fingerprint"].upper()
867
.replace(" ", ""))
868
if "secret" in section:
869
client["secret"] = codecs.decode(section["secret"]
870
.encode("utf-8"),
871
"base64")
872
elif "secfile" in section:
873
with open(os.path.expanduser(os.path.expandvars
874
(section["secfile"])),
875
"rb") as secfile:
876
client["secret"] = secfile.read()
877
else:
878
raise TypeError("No secret or secfile for section {}"
879
.format(section))
880
client["timeout"] = string_to_delta(section["timeout"])
881
client["extended_timeout"] = string_to_delta(
882
section["extended_timeout"])
883
client["interval"] = string_to_delta(section["interval"])
884
client["approval_delay"] = string_to_delta(
885
section["approval_delay"])
886
client["approval_duration"] = string_to_delta(
887
section["approval_duration"])
888
client["checker_command"] = section["checker"]
889
client["last_approval_request"] = None
890
client["last_checked_ok"] = None
891
client["last_checker_status"] = -2
892
893
return settings
894
895
def __init__(self, settings, name=None, server_settings=None):
338
896
self.name = name
339
if config is None:
340
config = {}
897
if server_settings is None:
898
server_settings = {}
899
self.server_settings = server_settings
900
# adding all client settings
901
for setting, value in settings.items():
902
setattr(self, setting, value)
903
904
if self.enabled:
905
if not hasattr(self, "last_enabled"):
906
self.last_enabled = datetime.datetime.utcnow()
907
if not hasattr(self, "expires"):
908
self.expires = (datetime.datetime.utcnow()
909
+ self.timeout)
910
else:
911
self.last_enabled = None
912
self.expires = None
913
341
914
logger.debug("Creating client %r", self.name)
342
# Uppercase and remove spaces from fingerprint for later
343
# comparison purposes with return value from the fingerprint()
344
# function
345
self.fingerprint = (config["fingerprint"].upper()
346
.replace(" ", ""))
347
915
logger.debug(" Fingerprint: %s", self.fingerprint)
348
if "secret" in config:
349
self.secret = config["secret"].decode("base64")
350
elif "secfile" in config:
351
with open(os.path.expanduser(os.path.expandvars
352
(config["secfile"])),
353
"rb") as secfile:
354
self.secret = secfile.read()
355
else:
356
raise TypeError("No secret or secfile for client %s"
357
% self.name)
358
self.host = config.get("host", "")
359
self.created = datetime.datetime.utcnow()
360
self.enabled = False
361
self.last_approval_request = None
362
self.last_enabled = None
363
self.last_checked_ok = None
364
self.timeout = string_to_delta(config["timeout"])
365
self.extended_timeout = string_to_delta(config
366
["extended_timeout"])
367
self.interval = string_to_delta(config["interval"])
368
self.disable_hook = disable_hook
916
self.created = settings.get("created",
917
datetime.datetime.utcnow())
918
919
# attributes specific for this server instance
369
920
self.checker = None
370
921
self.checker_initiator_tag = None
371
922
self.disable_initiator_tag = None
372
self.expires = None
373
923
self.checker_callback_tag = None
374
self.checker_command = config["checker"]
375
924
self.current_checker_command = None
376
self.last_connect = None
377
self._approved = None
378
self.approved_by_default = config.get("approved_by_default",
379
True)
925
self.approved = None
380
926
self.approvals_pending = 0
381
self.approval_delay = string_to_delta(
382
config["approval_delay"])
383
self.approval_duration = string_to_delta(
384
config["approval_duration"])
385
self.changedstate = (multiprocessing_manager
386
.Condition(multiprocessing_manager
387
.Lock()))
388
927
self.changedstate = multiprocessing_manager.Condition(
928
multiprocessing_manager.Lock())
929
self.client_structure = [attr
930
for attr in self.__dict__.keys()
931
if not attr.startswith("_")]
932
self.client_structure.append("client_structure")
933
934
for name, t in inspect.getmembers(
935
type(self), lambda obj: isinstance(obj, property)):
936
if not name.startswith("_"):
937
self.client_structure.append(name)
938
939
# Send notice to process children that client state has changed
389
940
def send_changedstate(self):
390
self.changedstate.acquire()
391
self.changedstate.notify_all()
392
self.changedstate.release()
393
941
with self.changedstate:
942
self.changedstate.notify_all()
943
394
944
def enable(self):
395
945
"""Start this client's checker and timeout hooks"""
396
946
if getattr(self, "enabled", False):
397
947
# Already enabled
398
948
return
399
self.send_changedstate()
400
# Schedule a new checker to be started an 'interval' from now,
401
# and every interval from then on.
402
self.checker_initiator_tag = (gobject.timeout_add
403
(self.interval_milliseconds(),
404
self.start_checker))
405
# Schedule a disable() when 'timeout' has passed
406
949
self.expires = datetime.datetime.utcnow() + self.timeout
407
self.disable_initiator_tag = (gobject.timeout_add
408
(self.timeout_milliseconds(),
409
self.disable))
410
950
self.enabled = True
411
951
self.last_enabled = datetime.datetime.utcnow()
412
# Also start a new checker *right now*.
413
self.start_checker()
414
952
self.init_checker()
953
self.send_changedstate()
954
415
955
def disable(self, quiet=True):
416
956
"""Disable this client."""
417
957
if not getattr(self, "enabled", False):
418
958
return False
419
959
if not quiet:
420
self.send_changedstate()
421
if not quiet:
422
960
logger.info("Disabling client %s", self.name)
423
if getattr(self, "disable_initiator_tag", False):
424
gobject.source_remove(self.disable_initiator_tag)
961
if getattr(self, "disable_initiator_tag", None) is not None:
962
GLib.source_remove(self.disable_initiator_tag)
425
963
self.disable_initiator_tag = None
426
964
self.expires = None
427
if getattr(self, "checker_initiator_tag", False):
428
gobject.source_remove(self.checker_initiator_tag)
965
if getattr(self, "checker_initiator_tag", None) is not None:
966
GLib.source_remove(self.checker_initiator_tag)
429
967
self.checker_initiator_tag = None
430
968
self.stop_checker()
431
if self.disable_hook:
432
self.disable_hook(self)
433
969
self.enabled = False
434
# Do not run this again if called by a gobject.timeout_add
970
if not quiet:
971
self.send_changedstate()
972
# Do not run this again if called by a GLib.timeout_add
435
973
return False
436
974
437
975
def __del__(self):
438
self.disable_hook = None
439
976
self.disable()
440
441
def checker_callback(self, pid, condition, command):
977
978
def init_checker(self):
979
# Schedule a new checker to be started an 'interval' from now,
980
# and every interval from then on.
981
if self.checker_initiator_tag is not None:
982
GLib.source_remove(self.checker_initiator_tag)
983
self.checker_initiator_tag = GLib.timeout_add(
984
int(self.interval.total_seconds() * 1000),
985
self.start_checker)
986
# Schedule a disable() when 'timeout' has passed
987
if self.disable_initiator_tag is not None:
988
GLib.source_remove(self.disable_initiator_tag)
989
self.disable_initiator_tag = GLib.timeout_add(
990
int(self.timeout.total_seconds() * 1000), self.disable)
991
# Also start a new checker *right now*.
992
self.start_checker()
993
994
def checker_callback(self, source, condition, connection,
995
command):
442
996
"""The checker has completed, so take appropriate actions."""
443
997
self.checker_callback_tag = None
444
998
self.checker = None
445
if os.WIFEXITED(condition):
446
exitstatus = os.WEXITSTATUS(condition)
447
if exitstatus == 0:
999
# Read return code from connection (see call_pipe)
1000
returncode = connection.recv()
1001
connection.close()
1002
1003
if returncode >= 0:
1004
self.last_checker_status = returncode
1005
self.last_checker_signal = None
1006
if self.last_checker_status == 0:
448
1007
logger.info("Checker for %(name)s succeeded",
449
1008
vars(self))
450
1009
self.checked_ok()
451
1010
else:
452
logger.info("Checker for %(name)s failed",
453
vars(self))
1011
logger.info("Checker for %(name)s failed", vars(self))
454
1012
else:
1013
self.last_checker_status = -1
1014
self.last_checker_signal = -returncode
455
1015
logger.warning("Checker for %(name)s crashed?",
456
1016
vars(self))
457
458
def checked_ok(self, timeout=None):
459
"""Bump up the timeout for this client.
460
461
This should only be called when the client has been seen,
462
alive and well.
463
"""
1017
return False
1018
1019
def checked_ok(self):
1020
"""Assert that the client has been seen, alive and well."""
1021
self.last_checked_ok = datetime.datetime.utcnow()
1022
self.last_checker_status = 0
1023
self.last_checker_signal = None
1024
self.bump_timeout()
1025
1026
def bump_timeout(self, timeout=None):
1027
"""Bump up the timeout for this client."""
464
1028
if timeout is None:
465
1029
timeout = self.timeout
466
self.last_checked_ok = datetime.datetime.utcnow()
467
1030
if self.disable_initiator_tag is not None:
468
gobject.source_remove(self.disable_initiator_tag)
1031
GLib.source_remove(self.disable_initiator_tag)
1032
self.disable_initiator_tag = None
469
1033
if getattr(self, "enabled", False):
470
self.disable_initiator_tag = (gobject.timeout_add
471
(_timedelta_to_milliseconds
472
(timeout), self.disable))
1034
self.disable_initiator_tag = GLib.timeout_add(
1035
int(timeout.total_seconds() * 1000), self.disable)
473
1036
self.expires = datetime.datetime.utcnow() + timeout
474
1037
475
1038
def need_approval(self):
476
1039
self.last_approval_request = datetime.datetime.utcnow()
477
1040
478
1041
def start_checker(self):
479
1042
"""Start a new checker subprocess if one is not running.
480
1043
481
1044
If a checker already exists, leave it running and do
482
1045
nothing."""
483
1046
# The reason for not killing a running checker is that if we
484
# did that, then if a checker (for some reason) started
485
# running slowly and taking more than 'interval' time, the
486
# client would inevitably timeout, since no checker would get
487
# a chance to run to completion. If we instead leave running
1047
# did that, and if a checker (for some reason) started running
1048
# slowly and taking more than 'interval' time, then the client
1049
# would inevitably timeout, since no checker would get a
1050
# chance to run to completion. If we instead leave running
488
1051
# checkers alone, the checker would have to take more time
489
1052
# than 'timeout' for the client to be disabled, which is as it
490
1053
# should be.
491
492
# If a checker exists, make sure it is not a zombie
493
try:
494
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
495
except (AttributeError, OSError) as error:
496
if (isinstance(error, OSError)
497
and error.errno != errno.ECHILD):
498
raise error
499
else:
500
if pid:
501
logger.warning("Checker was a zombie")
502
gobject.source_remove(self.checker_callback_tag)
503
self.checker_callback(pid, status,
504
self.current_checker_command)
1054
1055
if self.checker is not None and not self.checker.is_alive():
1056
logger.warning("Checker was not alive; joining")
1057
self.checker.join()
1058
self.checker = None
505
1059
# Start a new checker if needed
506
1060
if self.checker is None:
1061
# Escape attributes for the shell
1062
escaped_attrs = {
1063
attr: re.escape(str(getattr(self, attr)))
1064
for attr in self.runtime_expansions}
507
1065
try:
508
# In case checker_command has exactly one % operator
509
command = self.checker_command % self.host
510
except TypeError:
511
# Escape attributes for the shell
512
escaped_attrs = dict(
513
(attr,
514
re.escape(unicode(str(getattr(self, attr, "")),
515
errors=
516
'replace')))
517
for attr in
518
self.runtime_expansions)
519
520
try:
521
command = self.checker_command % escaped_attrs
522
except TypeError as error:
523
logger.error('Could not format string "%s":'
524
' %s', self.checker_command, error)
525
return True # Try again later
1066
command = self.checker_command % escaped_attrs
1067
except TypeError as error:
1068
logger.error('Could not format string "%s"',
1069
self.checker_command,
1070
exc_info=error)
1071
return True # Try again later
526
1072
self.current_checker_command = command
527
try:
528
logger.info("Starting checker %r for %s",
529
command, self.name)
530
# We don't need to redirect stdout and stderr, since
531
# in normal mode, that is already done by daemon(),
532
# and in debug mode we don't want to. (Stdin is
533
# always replaced by /dev/null.)
534
self.checker = subprocess.Popen(command,
535
close_fds=True,
536
shell=True, cwd="/")
537
self.checker_callback_tag = (gobject.child_watch_add
538
(self.checker.pid,
539
self.checker_callback,
540
data=command))
541
# The checker may have completed before the gobject
542
# watch was added. Check for this.
543
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
544
if pid:
545
gobject.source_remove(self.checker_callback_tag)
546
self.checker_callback(pid, status, command)
547
except OSError as error:
548
logger.error("Failed to start subprocess: %s",
549
error)
550
# Re-run this periodically if run by gobject.timeout_add
1073
logger.info("Starting checker %r for %s", command,
1074
self.name)
1075
# We don't need to redirect stdout and stderr, since
1076
# in normal mode, that is already done by daemon(),
1077
# and in debug mode we don't want to. (Stdin is
1078
# always replaced by /dev/null.)
1079
# The exception is when not debugging but nevertheless
1080
# running in the foreground; use the previously
1081
# created wnull.
1082
popen_args = {"close_fds": True,
1083
"shell": True,
1084
"cwd": "/"}
1085
if (not self.server_settings["debug"]
1086
and self.server_settings["foreground"]):
1087
popen_args.update({"stdout": wnull,
1088
"stderr": wnull})
1089
pipe = multiprocessing.Pipe(duplex=False)
1090
self.checker = multiprocessing.Process(
1091
target=call_pipe,
1092
args=(pipe[1], subprocess.call, command),
1093
kwargs=popen_args)
1094
self.checker.start()
1095
self.checker_callback_tag = GLib.io_add_watch(
1096
pipe[0].fileno(), GLib.IO_IN,
1097
self.checker_callback, pipe[0], command)
1098
# Re-run this periodically if run by GLib.timeout_add
551
1099
return True
552
1100
553
1101
def stop_checker(self):
554
1102
"""Force the checker process, if any, to stop."""
555
1103
if self.checker_callback_tag:
556
gobject.source_remove(self.checker_callback_tag)
1104
GLib.source_remove(self.checker_callback_tag)
557
1105
self.checker_callback_tag = None
558
1106
if getattr(self, "checker", None) is None:
559
1107
return
560
1108
logger.debug("Stopping checker for %(name)s", vars(self))
561
try:
562
os.kill(self.checker.pid, signal.SIGTERM)
563
#time.sleep(0.5)
564
#if self.checker.poll() is None:
565
# os.kill(self.checker.pid, signal.SIGKILL)
566
except OSError as error:
567
if error.errno != errno.ESRCH: # No such process
568
raise
1109
self.checker.terminate()
569
1110
self.checker = None
570
1111
571
1112
572
def dbus_service_property(dbus_interface, signature="v",
573
access="readwrite", byte_arrays=False):
1113
def dbus_service_property(dbus_interface,
1114
signature="v",
1115
access="readwrite",
1116
byte_arrays=False):
574
1117
"""Decorators for marking methods of a DBusObjectWithProperties to
575
1118
become properties on the D-Bus.
576
1119
577
1120
The decorated method will be called with no arguments by "Get"
578
1121
and with one argument by "Set".
579
1122
580
1123
The parameters, where they are supported, are the same as
581
1124
dbus.service.method, except there is only "signature", since the
582
1125
type from Get() and the type sent to Set() is the same.
585
1128
# "Set" method, so we fail early here:
586
1129
if byte_arrays and signature != "ay":
587
1130
raise ValueError("Byte arrays not supported for non-'ay'"
588
" signature %r" % signature)
1131
" signature {!r}".format(signature))
1132
589
1133
def decorator(func):
590
1134
func._dbus_is_property = True
591
1135
func._dbus_interface = dbus_interface
594
1138
func._dbus_name = func.__name__
595
1139
if func._dbus_name.endswith("_dbus_property"):
596
1140
func._dbus_name = func._dbus_name[:-14]
597
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
598
return func
1141
func._dbus_get_args_options = {'byte_arrays': byte_arrays}
1142
return func
1143
1144
return decorator
1145
1146
1147
def dbus_interface_annotations(dbus_interface):
1148
"""Decorator for marking functions returning interface annotations
1149
1150
Usage:
1151
1152
@dbus_interface_annotations("org.example.Interface")
1153
def _foo(self): # Function name does not matter
1154
return {"org.freedesktop.DBus.Deprecated": "true",
1155
"org.freedesktop.DBus.Property.EmitsChangedSignal":
1156
"false"}
1157
"""
1158
1159
def decorator(func):
1160
func._dbus_is_interface = True
1161
func._dbus_interface = dbus_interface
1162
func._dbus_name = dbus_interface
1163
return func
1164
1165
return decorator
1166
1167
1168
def dbus_annotations(annotations):
1169
"""Decorator to annotate D-Bus methods, signals or properties
1170
Usage:
1171
1172
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
1173
"org.freedesktop.DBus.Property."
1174
"EmitsChangedSignal": "false"})
1175
@dbus_service_property("org.example.Interface", signature="b",
1176
access="r")
1177
def Property_dbus_property(self):
1178
return dbus.Boolean(False)
1179
1180
See also the DBusObjectWithAnnotations class.
1181
"""
1182
1183
def decorator(func):
1184
func._dbus_annotations = annotations
1185
return func
1186
599
1187
return decorator
600
1188
601
1189
602
1190
class DBusPropertyException(dbus.exceptions.DBusException):
603
1191
"""A base class for D-Bus property-related exceptions
604
1192
"""
605
def __unicode__(self):
606
return unicode(str(self))
1193
pass
607
1194
608
1195
609
1196
class DBusPropertyAccessException(DBusPropertyException):
618
1205
pass
619
1206
620
1207
621
class DBusObjectWithProperties(dbus.service.Object):
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.
1213
"""
1214
1215
@staticmethod
1216
def _is_dbus_thing(thing):
1217
"""Returns a function testing if an attribute is a D-Bus thing
1218
1219
If called like _is_dbus_thing("method") it returns a function
1220
suitable for use as predicate to inspect.getmembers().
1221
"""
1222
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
1223
False)
1224
1225
def _get_all_dbus_things(self, thing):
1226
"""Returns a generator of (name, attribute) pairs
1227
"""
1228
return ((getattr(athing.__get__(self), "_dbus_name", name),
1229
athing.__get__(self))
1230
for cls in self.__class__.__mro__
1231
for name, athing in
1232
inspect.getmembers(cls, self._is_dbus_thing(thing)))
1233
1234
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1235
out_signature="s",
1236
path_keyword='object_path',
1237
connection_keyword='connection')
1238
def Introspect(self, object_path, connection):
1239
"""Overloading of standard D-Bus method.
1240
1241
Inserts annotation tags on methods and signals.
1242
"""
1243
xmlstring = dbus.service.Object.Introspect(self, object_path,
1244
connection)
1245
try:
1246
document = xml.dom.minidom.parseString(xmlstring)
1247
1248
for if_tag in document.getElementsByTagName("interface"):
1249
# Add annotation tags
1250
for typ in ("method", "signal"):
1251
for tag in if_tag.getElementsByTagName(typ):
1252
annots = dict()
1253
for name, prop in (self.
1254
_get_all_dbus_things(typ)):
1255
if (name == tag.getAttribute("name")
1256
and prop._dbus_interface
1257
== if_tag.getAttribute("name")):
1258
annots.update(getattr(
1259
prop, "_dbus_annotations", {}))
1260
for name, value in annots.items():
1261
ann_tag = document.createElement(
1262
"annotation")
1263
ann_tag.setAttribute("name", name)
1264
ann_tag.setAttribute("value", value)
1265
tag.appendChild(ann_tag)
1266
# Add interface annotation tags
1267
for annotation, value in dict(
1268
itertools.chain.from_iterable(
1269
annotations().items()
1270
for name, annotations
1271
in self._get_all_dbus_things("interface")
1272
if name == if_tag.getAttribute("name")
1273
)).items():
1274
ann_tag = document.createElement("annotation")
1275
ann_tag.setAttribute("name", annotation)
1276
ann_tag.setAttribute("value", value)
1277
if_tag.appendChild(ann_tag)
1278
# Fix argument name for the Introspect method itself
1279
if (if_tag.getAttribute("name")
1280
== dbus.INTROSPECTABLE_IFACE):
1281
for cn in if_tag.getElementsByTagName("method"):
1282
if cn.getAttribute("name") == "Introspect":
1283
for arg in cn.getElementsByTagName("arg"):
1284
if (arg.getAttribute("direction")
1285
== "out"):
1286
arg.setAttribute("name",
1287
"xml_data")
1288
xmlstring = document.toxml("utf-8")
1289
document.unlink()
1290
except (AttributeError, xml.dom.DOMException,
1291
xml.parsers.expat.ExpatError) as error:
1292
logger.error("Failed to override Introspection method",
1293
exc_info=error)
1294
return xmlstring
1295
1296
1297
class DBusObjectWithProperties(DBusObjectWithAnnotations):
622
1298
"""A D-Bus object with properties.
623
1299
624
1300
Classes inheriting from this can use the dbus_service_property
625
1301
decorator to expose methods as D-Bus properties. It exposes the
626
1302
standard Get(), Set(), and GetAll() methods on the D-Bus.
627
1303
"""
628
629
@staticmethod
630
def _is_dbus_property(obj):
631
return getattr(obj, "_dbus_is_property", False)
632
633
def _get_all_dbus_properties(self):
634
"""Returns a generator of (name, attribute) pairs
635
"""
636
return ((prop.__get__(self)._dbus_name, prop.__get__(self))
637
for cls in self.__class__.__mro__
638
for name, prop in
639
inspect.getmembers(cls, self._is_dbus_property))
640
1304
641
1305
def _get_dbus_property(self, interface_name, property_name):
642
1306
"""Returns a bound method if one exists which is a D-Bus
643
1307
property with the specified name and interface.
644
1308
"""
645
for cls in self.__class__.__mro__:
646
for name, value in (inspect.getmembers
647
(cls, self._is_dbus_property)):
1309
for cls in self.__class__.__mro__:
1310
for name, value in inspect.getmembers(
1311
cls, self._is_dbus_thing("property")):
648
1312
if (value._dbus_name == property_name
649
1313
and value._dbus_interface == interface_name):
650
1314
return value.__get__(self)
651
1315
652
1316
# No such property
653
raise DBusPropertyNotFound(self.dbus_object_path + ":"
654
+ interface_name + "."
655
+ property_name)
656
657
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
1317
raise DBusPropertyNotFound("{}:{}.{}".format(
1318
self.dbus_object_path, interface_name, property_name))
1319
1320
@classmethod
1321
def _get_all_interface_names(cls):
1322
"""Get a sequence of all interfaces supported by an object"""
1323
return (name for name in set(getattr(getattr(x, attr),
1324
"_dbus_interface", None)
1325
for x in (inspect.getmro(cls))
1326
for attr in dir(x))
1327
if name is not None)
1328
1329
@dbus.service.method(dbus.PROPERTIES_IFACE,
1330
in_signature="ss",
658
1331
out_signature="v")
659
1332
def Get(self, interface_name, property_name):
660
1333
"""Standard D-Bus property Get() method, see D-Bus standard.
666
1339
if not hasattr(value, "variant_level"):
667
1340
return value
668
1341
return type(value)(value, variant_level=value.variant_level+1)
669
1342
670
1343
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
671
1344
def Set(self, interface_name, property_name, value):
672
1345
"""Standard D-Bus property Set() method, see D-Bus standard.
678
1351
# The byte_arrays option is not supported yet on
679
1352
# signatures other than "ay".
680
1353
if prop._dbus_signature != "ay":
681
raise ValueError
682
value = dbus.ByteArray(''.join(unichr(byte)
683
for byte in value))
1354
raise ValueError("Byte arrays not supported for non-"
1355
"'ay' signature {!r}"
1356
.format(prop._dbus_signature))
1357
value = dbus.ByteArray(b''.join(chr(byte)
1358
for byte in value))
684
1359
prop(value)
685
686
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
1360
1361
@dbus.service.method(dbus.PROPERTIES_IFACE,
1362
in_signature="s",
687
1363
out_signature="a{sv}")
688
1364
def GetAll(self, interface_name):
689
1365
"""Standard D-Bus property GetAll() method, see D-Bus
690
1366
standard.
691
1367
692
1368
Note: Will not include properties with access="write".
693
1369
"""
694
all = {}
695
for name, prop in self._get_all_dbus_properties():
1370
properties = {}
1371
for name, prop in self._get_all_dbus_things("property"):
696
1372
if (interface_name
697
1373
and interface_name != prop._dbus_interface):
698
1374
# Interface non-empty but did not match
702
1378
continue
703
1379
value = prop()
704
1380
if not hasattr(value, "variant_level"):
705
all[name] = value
1381
properties[name] = value
706
1382
continue
707
all[name] = type(value)(value, variant_level=
708
value.variant_level+1)
709
return dbus.Dictionary(all, signature="sv")
710
1383
properties[name] = type(value)(
1384
value, variant_level=value.variant_level + 1)
1385
return dbus.Dictionary(properties, signature="sv")
1386
1387
@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
1388
def PropertiesChanged(self, interface_name, changed_properties,
1389
invalidated_properties):
1390
"""Standard D-Bus PropertiesChanged() signal, see D-Bus
1391
standard.
1392
"""
1393
pass
1394
711
1395
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
712
1396
out_signature="s",
713
1397
path_keyword='object_path',
714
1398
connection_keyword='connection')
715
1399
def Introspect(self, object_path, connection):
716
"""Standard D-Bus method, overloaded to insert property tags.
1400
"""Overloading of standard D-Bus method.
1401
1402
Inserts property tags and interface annotation tags.
717
1403
"""
718
xmlstring = dbus.service.Object.Introspect(self, object_path,
719
connection)
1404
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1405
object_path,
1406
connection)
720
1407
try:
721
1408
document = xml.dom.minidom.parseString(xmlstring)
1409
722
1410
def make_tag(document, name, prop):
723
1411
e = document.createElement("property")
724
1412
e.setAttribute("name", name)
725
1413
e.setAttribute("type", prop._dbus_signature)
726
1414
e.setAttribute("access", prop._dbus_access)
727
1415
return e
1416
728
1417
for if_tag in document.getElementsByTagName("interface"):
1418
# Add property tags
729
1419
for tag in (make_tag(document, name, prop)
730
1420
for name, prop
731
in self._get_all_dbus_properties()
1421
in self._get_all_dbus_things("property")
732
1422
if prop._dbus_interface
733
1423
== if_tag.getAttribute("name")):
734
1424
if_tag.appendChild(tag)
1425
# Add annotation tags for properties
1426
for tag in if_tag.getElementsByTagName("property"):
1427
annots = dict()
1428
for name, prop in self._get_all_dbus_things(
1429
"property"):
1430
if (name == tag.getAttribute("name")
1431
and prop._dbus_interface
1432
== if_tag.getAttribute("name")):
1433
annots.update(getattr(
1434
prop, "_dbus_annotations", {}))
1435
for name, value in annots.items():
1436
ann_tag = document.createElement(
1437
"annotation")
1438
ann_tag.setAttribute("name", name)
1439
ann_tag.setAttribute("value", value)
1440
tag.appendChild(ann_tag)
735
1441
# Add the names to the return values for the
736
1442
# "org.freedesktop.DBus.Properties" methods
737
1443
if (if_tag.getAttribute("name")
752
1458
except (AttributeError, xml.dom.DOMException,
753
1459
xml.parsers.expat.ExpatError) as error:
754
1460
logger.error("Failed to override Introspection method",
755
error)
756
return xmlstring
757
758
759
def datetime_to_dbus (dt, variant_level=0):
1461
exc_info=error)
1462
return xmlstring
1463
1464
1465
try:
1466
dbus.OBJECT_MANAGER_IFACE
1467
except AttributeError:
1468
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1469
1470
1471
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1472
"""A D-Bus object with an ObjectManager.
1473
1474
Classes inheriting from this exposes the standard
1475
GetManagedObjects call and the InterfacesAdded and
1476
InterfacesRemoved signals on the standard
1477
"org.freedesktop.DBus.ObjectManager" interface.
1478
1479
Note: No signals are sent automatically; they must be sent
1480
manually.
1481
"""
1482
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1483
out_signature="a{oa{sa{sv}}}")
1484
def GetManagedObjects(self):
1485
"""This function must be overridden"""
1486
raise NotImplementedError()
1487
1488
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1489
signature="oa{sa{sv}}")
1490
def InterfacesAdded(self, object_path, interfaces_and_properties):
1491
pass
1492
1493
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1494
def InterfacesRemoved(self, object_path, interfaces):
1495
pass
1496
1497
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1498
out_signature="s",
1499
path_keyword='object_path',
1500
connection_keyword='connection')
1501
def Introspect(self, object_path, connection):
1502
"""Overloading of standard D-Bus method.
1503
1504
Override return argument name of GetManagedObjects to be
1505
"objpath_interfaces_and_properties"
1506
"""
1507
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1508
object_path,
1509
connection)
1510
try:
1511
document = xml.dom.minidom.parseString(xmlstring)
1512
1513
for if_tag in document.getElementsByTagName("interface"):
1514
# Fix argument name for the GetManagedObjects method
1515
if (if_tag.getAttribute("name")
1516
== dbus.OBJECT_MANAGER_IFACE):
1517
for cn in if_tag.getElementsByTagName("method"):
1518
if (cn.getAttribute("name")
1519
== "GetManagedObjects"):
1520
for arg in cn.getElementsByTagName("arg"):
1521
if (arg.getAttribute("direction")
1522
== "out"):
1523
arg.setAttribute(
1524
"name",
1525
"objpath_interfaces"
1526
"_and_properties")
1527
xmlstring = document.toxml("utf-8")
1528
document.unlink()
1529
except (AttributeError, xml.dom.DOMException,
1530
xml.parsers.expat.ExpatError) as error:
1531
logger.error("Failed to override Introspection method",
1532
exc_info=error)
1533
return xmlstring
1534
1535
1536
def datetime_to_dbus(dt, variant_level=0):
760
1537
"""Convert a UTC datetime.datetime() to a D-Bus type."""
761
1538
if dt is None:
762
return dbus.String("", variant_level = variant_level)
763
return dbus.String(dt.isoformat(),
764
variant_level=variant_level)
765
766
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
767
.__metaclass__):
768
"""Applied to an empty subclass of a D-Bus object, this metaclass
769
will add additional D-Bus attributes matching a certain pattern.
1539
return dbus.String("", variant_level=variant_level)
1540
return dbus.String(dt.isoformat(), variant_level=variant_level)
1541
1542
1543
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1544
"""A class decorator; applied to a subclass of
1545
dbus.service.Object, it will add alternate D-Bus attributes with
1546
interface names according to the "alt_interface_names" mapping.
1547
Usage:
1548
1549
@alternate_dbus_interfaces({"org.example.Interface":
1550
"net.example.AlternateInterface"})
1551
class SampleDBusObject(dbus.service.Object):
1552
@dbus.service.method("org.example.Interface")
1553
def SampleDBusMethod():
1554
pass
1555
1556
The above "SampleDBusMethod" on "SampleDBusObject" will be
1557
reachable via two interfaces: "org.example.Interface" and
1558
"net.example.AlternateInterface", the latter of which will have
1559
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1560
"true", unless "deprecate" is passed with a False value.
1561
1562
This works for methods and signals, and also for D-Bus properties
1563
(from DBusObjectWithProperties) and interfaces (from the
1564
dbus_interface_annotations decorator).
770
1565
"""
771
def __new__(mcs, name, bases, attr):
772
# Go through all the base classes which could have D-Bus
773
# methods, signals, or properties in them
774
for base in (b for b in bases
775
if issubclass(b, dbus.service.Object)):
776
# Go though all attributes of the base class
777
for attrname, attribute in inspect.getmembers(base):
1566
1567
def wrapper(cls):
1568
for orig_interface_name, alt_interface_name in (
1569
alt_interface_names.items()):
1570
attr = {}
1571
interface_names = set()
1572
# Go though all attributes of the class
1573
for attrname, attribute in inspect.getmembers(cls):
778
1574
# Ignore non-D-Bus attributes, and D-Bus attributes
779
1575
# with the wrong interface name
780
1576
if (not hasattr(attribute, "_dbus_interface")
781
or not attribute._dbus_interface
782
.startswith("se.recompile.Mandos")):
1577
or not attribute._dbus_interface.startswith(
1578
orig_interface_name)):
783
1579
continue
784
1580
# Create an alternate D-Bus interface name based on
785
1581
# the current name
786
alt_interface = (attribute._dbus_interface
787
.replace("se.recompile.Mandos",
788
"se.bsnet.fukt.Mandos"))
1582
alt_interface = attribute._dbus_interface.replace(
1583
orig_interface_name, alt_interface_name)
1584
interface_names.add(alt_interface)
789
1585
# Is this a D-Bus signal?
790
1586
if getattr(attribute, "_dbus_is_signal", False):
791
# Extract the original non-method function by
792
# black magic
793
nonmethod_func = (dict(
1587
# Extract the original non-method undecorated
1588
# function by black magic
1589
if sys.version_info.major == 2:
1590
nonmethod_func = (dict(
794
1591
zip(attribute.func_code.co_freevars,
795
attribute.__closure__))["func"]
796
.cell_contents)
1592
attribute.__closure__))
1593
["func"].cell_contents)
1594
else:
1595
nonmethod_func = (dict(
1596
zip(attribute.__code__.co_freevars,
1597
attribute.__closure__))
1598
["func"].cell_contents)
797
1599
# Create a new, but exactly alike, function
798
1600
# object, and decorate it to be a new D-Bus signal
799
1601
# with the alternate D-Bus interface name
800
new_function = (dbus.service.signal
801
(alt_interface,
802
attribute._dbus_signature)
803
(types.FunctionType(
804
nonmethod_func.func_code,
805
nonmethod_func.func_globals,
806
nonmethod_func.func_name,
807
nonmethod_func.func_defaults,
808
nonmethod_func.func_closure)))
1602
new_function = copy_function(nonmethod_func)
1603
new_function = (dbus.service.signal(
1604
alt_interface,
1605
attribute._dbus_signature)(new_function))
1606
# Copy annotations, if any
1607
try:
1608
new_function._dbus_annotations = dict(
1609
attribute._dbus_annotations)
1610
except AttributeError:
1611
pass
1612
809
1613
# Define a creator of a function to call both the
810
# old and new functions, so both the old and new
811
# signals gets sent when the function is called
1614
# original and alternate functions, so both the
1615
# original and alternate signals gets sent when
1616
# the function is called
812
1617
def fixscope(func1, func2):
813
1618
"""This function is a scope container to pass
814
1619
func1 and func2 to the "call_both" function
815
1620
outside of its arguments"""
1621
1622
@functools.wraps(func2)
816
1623
def call_both(*args, **kwargs):
817
1624
"""This function will emit two D-Bus
818
1625
signals by calling func1 and func2"""
819
1626
func1(*args, **kwargs)
820
1627
func2(*args, **kwargs)
1628
# Make wrapper function look like a D-Bus
1629
# signal
1630
for name, attr in inspect.getmembers(func2):
1631
if name.startswith("_dbus_"):
1632
setattr(call_both, name, attr)
1633
821
1634
return call_both
822
1635
# Create the "call_both" function and add it to
823
1636
# the class
824
attr[attrname] = fixscope(attribute,
825
new_function)
1637
attr[attrname] = fixscope(attribute, new_function)
826
1638
# Is this a D-Bus method?
827
1639
elif getattr(attribute, "_dbus_is_method", False):
828
1640
# Create a new, but exactly alike, function
829
1641
# object. Decorate it to be a new D-Bus method
830
1642
# with the alternate D-Bus interface name. Add it
831
1643
# to the class.
832
attr[attrname] = (dbus.service.method
833
(alt_interface,
834
attribute._dbus_in_signature,
835
attribute._dbus_out_signature)
836
(types.FunctionType
837
(attribute.func_code,
838
attribute.func_globals,
839
attribute.func_name,
840
attribute.func_defaults,
841
attribute.func_closure)))
1644
attr[attrname] = (
1645
dbus.service.method(
1646
alt_interface,
1647
attribute._dbus_in_signature,
1648
attribute._dbus_out_signature)
1649
(copy_function(attribute)))
1650
# Copy annotations, if any
1651
try:
1652
attr[attrname]._dbus_annotations = dict(
1653
attribute._dbus_annotations)
1654
except AttributeError:
1655
pass
842
1656
# Is this a D-Bus property?
843
1657
elif getattr(attribute, "_dbus_is_property", False):
844
1658
# Create a new, but exactly alike, function
845
1659
# object, and decorate it to be a new D-Bus
846
1660
# property with the alternate D-Bus interface
847
1661
# name. Add it to the class.
848
attr[attrname] = (dbus_service_property
849
(alt_interface,
850
attribute._dbus_signature,
851
attribute._dbus_access,
852
attribute
853
._dbus_get_args_options
854
["byte_arrays"])
855
(types.FunctionType
856
(attribute.func_code,
857
attribute.func_globals,
858
attribute.func_name,
859
attribute.func_defaults,
860
attribute.func_closure)))
861
return type.__new__(mcs, name, bases, attr)
862
1662
attr[attrname] = (dbus_service_property(
1663
alt_interface, attribute._dbus_signature,
1664
attribute._dbus_access,
1665
attribute._dbus_get_args_options
1666
["byte_arrays"])
1667
(copy_function(attribute)))
1668
# Copy annotations, if any
1669
try:
1670
attr[attrname]._dbus_annotations = dict(
1671
attribute._dbus_annotations)
1672
except AttributeError:
1673
pass
1674
# Is this a D-Bus interface?
1675
elif getattr(attribute, "_dbus_is_interface", False):
1676
# Create a new, but exactly alike, function
1677
# object. Decorate it to be a new D-Bus interface
1678
# with the alternate D-Bus interface name. Add it
1679
# to the class.
1680
attr[attrname] = (
1681
dbus_interface_annotations(alt_interface)
1682
(copy_function(attribute)))
1683
if deprecate:
1684
# Deprecate all alternate interfaces
1685
iname = "_AlternateDBusNames_interface_annotation{}"
1686
for interface_name in interface_names:
1687
1688
@dbus_interface_annotations(interface_name)
1689
def func(self):
1690
return {"org.freedesktop.DBus.Deprecated":
1691
"true"}
1692
# Find an unused name
1693
for aname in (iname.format(i)
1694
for i in itertools.count()):
1695
if aname not in attr:
1696
attr[aname] = func
1697
break
1698
if interface_names:
1699
# Replace the class with a new subclass of it with
1700
# methods, signals, etc. as created above.
1701
if sys.version_info.major == 2:
1702
cls = type(b"{}Alternate".format(cls.__name__),
1703
(cls, ), attr)
1704
else:
1705
cls = type("{}Alternate".format(cls.__name__),
1706
(cls, ), attr)
1707
return cls
1708
1709
return wrapper
1710
1711
1712
@alternate_dbus_interfaces({"se.recompile.Mandos":
1713
"se.bsnet.fukt.Mandos"})
863
1714
class ClientDBus(Client, DBusObjectWithProperties):
864
1715
"""A Client class using D-Bus
865
1716
866
1717
Attributes:
867
1718
dbus_object_path: dbus.ObjectPath
868
1719
bus: dbus.SystemBus()
869
1720
"""
870
1721
871
1722
runtime_expansions = (Client.runtime_expansions
872
+ ("dbus_object_path",))
873
1723
+ ("dbus_object_path", ))
1724
1725
_interface = "se.recompile.Mandos.Client"
1726
874
1727
# dbus.service.Object doesn't use super(), so we can't either.
875
876
def __init__(self, bus = None, *args, **kwargs):
877
self._approvals_pending = 0
1728
1729
def __init__(self, bus=None, *args, **kwargs):
878
1730
self.bus = bus
879
1731
Client.__init__(self, *args, **kwargs)
880
1732
# Only now, when this client is initialized, can it show up on
881
1733
# the D-Bus
882
client_object_name = unicode(self.name).translate(
1734
client_object_name = str(self.name).translate(
883
1735
{ord("."): ord("_"),
884
1736
ord("-"): ord("_")})
885
self.dbus_object_path = (dbus.ObjectPath
886
("/clients/" + client_object_name))
1737
self.dbus_object_path = dbus.ObjectPath(
1738
"/clients/" + client_object_name)
887
1739
DBusObjectWithProperties.__init__(self, self.bus,
888
1740
self.dbus_object_path)
889
890
def notifychangeproperty(transform_func,
891
dbus_name, type_func=lambda x: x,
892
variant_level=1):
1741
1742
def notifychangeproperty(transform_func, dbus_name,
1743
type_func=lambda x: x,
1744
variant_level=1,
1745
invalidate_only=False,
1746
_interface=_interface):
893
1747
""" Modify a variable so that it's a property which announces
894
1748
its changes to DBus.
895
1749
900
1754
to the D-Bus. Default: no transform
901
1755
variant_level: D-Bus variant level. Default: 1
902
1756
"""
903
attrname = "_{0}".format(dbus_name)
1757
attrname = "_{}".format(dbus_name)
1758
904
1759
def setter(self, value):
905
1760
if hasattr(self, "dbus_object_path"):
906
1761
if (not hasattr(self, attrname) or
907
1762
type_func(getattr(self, attrname, None))
908
1763
!= type_func(value)):
909
dbus_value = transform_func(type_func(value),
910
variant_level
911
=variant_level)
912
self.PropertyChanged(dbus.String(dbus_name),
913
dbus_value)
1764
if invalidate_only:
1765
self.PropertiesChanged(
1766
_interface, dbus.Dictionary(),
1767
dbus.Array((dbus_name, )))
1768
else:
1769
dbus_value = transform_func(
1770
type_func(value),
1771
variant_level=variant_level)
1772
self.PropertyChanged(dbus.String(dbus_name),
1773
dbus_value)
1774
self.PropertiesChanged(
1775
_interface,
1776
dbus.Dictionary({dbus.String(dbus_name):
1777
dbus_value}),
1778
dbus.Array())
914
1779
setattr(self, attrname, value)
915
1780
916
1781
return property(lambda self: getattr(self, attrname), setter)
917
918
1782
919
1783
expires = notifychangeproperty(datetime_to_dbus, "Expires")
920
1784
approvals_pending = notifychangeproperty(dbus.Boolean,
921
1785
"ApprovalPending",
922
type_func = bool)
1786
type_func=bool)
923
1787
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
924
1788
last_enabled = notifychangeproperty(datetime_to_dbus,
925
1789
"LastEnabled")
926
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
927
type_func = lambda checker:
928
checker is not None)
1790
checker = notifychangeproperty(
1791
dbus.Boolean, "CheckerRunning",
1792
type_func=lambda checker: checker is not None)
929
1793
last_checked_ok = notifychangeproperty(datetime_to_dbus,
930
1794
"LastCheckedOK")
1795
last_checker_status = notifychangeproperty(dbus.Int16,
1796
"LastCheckerStatus")
931
1797
last_approval_request = notifychangeproperty(
932
1798
datetime_to_dbus, "LastApprovalRequest")
933
1799
approved_by_default = notifychangeproperty(dbus.Boolean,
934
1800
"ApprovedByDefault")
935
approval_delay = notifychangeproperty(dbus.UInt16,
936
"ApprovalDelay",
937
type_func =
938
_timedelta_to_milliseconds)
1801
approval_delay = notifychangeproperty(
1802
dbus.UInt64, "ApprovalDelay",
1803
type_func=lambda td: td.total_seconds() * 1000)
939
1804
approval_duration = notifychangeproperty(
940
dbus.UInt16, "ApprovalDuration",
941
type_func = _timedelta_to_milliseconds)
1805
dbus.UInt64, "ApprovalDuration",
1806
type_func=lambda td: td.total_seconds() * 1000)
942
1807
host = notifychangeproperty(dbus.String, "Host")
943
timeout = notifychangeproperty(dbus.UInt16, "Timeout",
944
type_func =
945
_timedelta_to_milliseconds)
1808
timeout = notifychangeproperty(
1809
dbus.UInt64, "Timeout",
1810
type_func=lambda td: td.total_seconds() * 1000)
946
1811
extended_timeout = notifychangeproperty(
947
dbus.UInt16, "ExtendedTimeout",
948
type_func = _timedelta_to_milliseconds)
949
interval = notifychangeproperty(dbus.UInt16,
950
"Interval",
951
type_func =
952
_timedelta_to_milliseconds)
1812
dbus.UInt64, "ExtendedTimeout",
1813
type_func=lambda td: td.total_seconds() * 1000)
1814
interval = notifychangeproperty(
1815
dbus.UInt64, "Interval",
1816
type_func=lambda td: td.total_seconds() * 1000)
953
1817
checker_command = notifychangeproperty(dbus.String, "Checker")
954
1818
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1819
invalidate_only=True)
1820
955
1821
del notifychangeproperty
956
1822
957
1823
def __del__(self, *args, **kwargs):
958
1824
try:
959
1825
self.remove_from_connection()
962
1828
if hasattr(DBusObjectWithProperties, "__del__"):
963
1829
DBusObjectWithProperties.__del__(self, *args, **kwargs)
964
1830
Client.__del__(self, *args, **kwargs)
965
966
def checker_callback(self, pid, condition, command,
967
*args, **kwargs):
968
self.checker_callback_tag = None
969
self.checker = None
970
if os.WIFEXITED(condition):
971
exitstatus = os.WEXITSTATUS(condition)
1831
1832
def checker_callback(self, source, condition,
1833
connection, command, *args, **kwargs):
1834
ret = Client.checker_callback(self, source, condition,
1835
connection, command, *args,
1836
**kwargs)
1837
exitstatus = self.last_checker_status
1838
if exitstatus >= 0:
972
1839
# Emit D-Bus signal
973
1840
self.CheckerCompleted(dbus.Int16(exitstatus),
974
dbus.Int64(condition),
1841
# This is specific to GNU libC
1842
dbus.Int64(exitstatus << 8),
975
1843
dbus.String(command))
976
1844
else:
977
1845
# Emit D-Bus signal
978
1846
self.CheckerCompleted(dbus.Int16(-1),
979
dbus.Int64(condition),
1847
dbus.Int64(
1848
# This is specific to GNU libC
1849
(exitstatus << 8)
1850
| self.last_checker_signal),
980
1851
dbus.String(command))
981
982
return Client.checker_callback(self, pid, condition, command,
983
*args, **kwargs)
984
1852
return ret
1853
985
1854
def start_checker(self, *args, **kwargs):
986
old_checker = self.checker
987
if self.checker is not None:
988
old_checker_pid = self.checker.pid
989
else:
990
old_checker_pid = None
1855
old_checker_pid = getattr(self.checker, "pid", None)
991
1856
r = Client.start_checker(self, *args, **kwargs)
992
1857
# Only if new checker process was started
993
1858
if (self.checker is not None
995
1860
# Emit D-Bus signal
996
1861
self.CheckerStarted(self.current_checker_command)
997
1862
return r
998
1863
999
1864
def _reset_approved(self):
1000
self._approved = None
1865
self.approved = None
1001
1866
return False
1002
1867
1003
1868
def approve(self, value=True):
1869
self.approved = value
1870
GLib.timeout_add(int(self.approval_duration.total_seconds()
1871
* 1000), self._reset_approved)
1004
1872
self.send_changedstate()
1005
self._approved = value
1006
gobject.timeout_add(_timedelta_to_milliseconds
1007
(self.approval_duration),
1008
self._reset_approved)
1009
1010
1011
## D-Bus methods, signals & properties
1012
_interface = "se.recompile.Mandos.Client"
1013
1014
## Signals
1015
1873
1874
# D-Bus methods, signals & properties
1875
1876
# Interfaces
1877
1878
# Signals
1879
1016
1880
# CheckerCompleted - signal
1017
1881
@dbus.service.signal(_interface, signature="nxs")
1018
1882
def CheckerCompleted(self, exitcode, waitstatus, command):
1019
1883
"D-Bus signal"
1020
1884
pass
1021
1885
1022
1886
# CheckerStarted - signal
1023
1887
@dbus.service.signal(_interface, signature="s")
1024
1888
def CheckerStarted(self, command):
1025
1889
"D-Bus signal"
1026
1890
pass
1027
1891
1028
1892
# PropertyChanged - signal
1893
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1029
1894
@dbus.service.signal(_interface, signature="sv")
1030
1895
def PropertyChanged(self, property, value):
1031
1896
"D-Bus signal"
1032
1897
pass
1033
1898
1034
1899
# GotSecret - signal
1035
1900
@dbus.service.signal(_interface)
1036
1901
def GotSecret(self):
1039
1904
server to mandos-client
1040
1905
"""
1041
1906
pass
1042
1907
1043
1908
# Rejected - signal
1044
1909
@dbus.service.signal(_interface, signature="s")
1045
1910
def Rejected(self, reason):
1046
1911
"D-Bus signal"
1047
1912
pass
1048
1913
1049
1914
# NeedApproval - signal
1050
1915
@dbus.service.signal(_interface, signature="tb")
1051
1916
def NeedApproval(self, timeout, default):
1052
1917
"D-Bus signal"
1053
1918
return self.need_approval()
1054
1055
## Methods
1056
1919
1920
# Methods
1921
1057
1922
# Approve - method
1058
1923
@dbus.service.method(_interface, in_signature="b")
1059
1924
def Approve(self, value):
1060
1925
self.approve(value)
1061
1926
1062
1927
# CheckedOK - method
1063
1928
@dbus.service.method(_interface)
1064
1929
def CheckedOK(self):
1065
1930
self.checked_ok()
1066
1931
1067
1932
# Enable - method
1933
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1068
1934
@dbus.service.method(_interface)
1069
1935
def Enable(self):
1070
1936
"D-Bus method"
1071
1937
self.enable()
1072
1938
1073
1939
# StartChecker - method
1940
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1074
1941
@dbus.service.method(_interface)
1075
1942
def StartChecker(self):
1076
1943
"D-Bus method"
1077
1944
self.start_checker()
1078
1945
1079
1946
# Disable - method
1947
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1080
1948
@dbus.service.method(_interface)
1081
1949
def Disable(self):
1082
1950
"D-Bus method"
1083
1951
self.disable()
1084
1952
1085
1953
# StopChecker - method
1954
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1086
1955
@dbus.service.method(_interface)
1087
1956
def StopChecker(self):
1088
1957
self.stop_checker()
1089
1090
## Properties
1091
1958
1959
# Properties
1960
1092
1961
# ApprovalPending - property
1093
1962
@dbus_service_property(_interface, signature="b", access="read")
1094
1963
def ApprovalPending_dbus_property(self):
1095
1964
return dbus.Boolean(bool(self.approvals_pending))
1096
1965
1097
1966
# ApprovedByDefault - property
1098
@dbus_service_property(_interface, signature="b",
1967
@dbus_service_property(_interface,
1968
signature="b",
1099
1969
access="readwrite")
1100
1970
def ApprovedByDefault_dbus_property(self, value=None):
1101
1971
if value is None: # get
1102
1972
return dbus.Boolean(self.approved_by_default)
1103
1973
self.approved_by_default = bool(value)
1104
1974
1105
1975
# ApprovalDelay - property
1106
@dbus_service_property(_interface, signature="t",
1976
@dbus_service_property(_interface,
1977
signature="t",
1107
1978
access="readwrite")
1108
1979
def ApprovalDelay_dbus_property(self, value=None):
1109
1980
if value is None: # get
1110
return dbus.UInt64(self.approval_delay_milliseconds())
1981
return dbus.UInt64(self.approval_delay.total_seconds()
1982
* 1000)
1111
1983
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1112
1984
1113
1985
# ApprovalDuration - property
1114
@dbus_service_property(_interface, signature="t",
1986
@dbus_service_property(_interface,
1987
signature="t",
1115
1988
access="readwrite")
1116
1989
def ApprovalDuration_dbus_property(self, value=None):
1117
1990
if value is None: # get
1118
return dbus.UInt64(_timedelta_to_milliseconds(
1119
self.approval_duration))
1991
return dbus.UInt64(self.approval_duration.total_seconds()
1992
* 1000)
1120
1993
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1121
1994
1122
1995
# Name - property
1996
@dbus_annotations(
1997
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1123
1998
@dbus_service_property(_interface, signature="s", access="read")
1124
1999
def Name_dbus_property(self):
1125
2000
return dbus.String(self.name)
1126
2001
1127
2002
# Fingerprint - property
2003
@dbus_annotations(
2004
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1128
2005
@dbus_service_property(_interface, signature="s", access="read")
1129
2006
def Fingerprint_dbus_property(self):
1130
2007
return dbus.String(self.fingerprint)
1131
2008
1132
2009
# Host - property
1133
@dbus_service_property(_interface, signature="s",
2010
@dbus_service_property(_interface,
2011
signature="s",
1134
2012
access="readwrite")
1135
2013
def Host_dbus_property(self, value=None):
1136
2014
if value is None: # get
1137
2015
return dbus.String(self.host)
1138
self.host = value
1139
2016
self.host = str(value)
2017
1140
2018
# Created - property
2019
@dbus_annotations(
2020
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1141
2021
@dbus_service_property(_interface, signature="s", access="read")
1142
2022
def Created_dbus_property(self):
1143
return dbus.String(datetime_to_dbus(self.created))
1144
2023
return datetime_to_dbus(self.created)
2024
1145
2025
# LastEnabled - property
1146
2026
@dbus_service_property(_interface, signature="s", access="read")
1147
2027
def LastEnabled_dbus_property(self):
1148
2028
return datetime_to_dbus(self.last_enabled)
1149
2029
1150
2030
# Enabled - property
1151
@dbus_service_property(_interface, signature="b",
2031
@dbus_service_property(_interface,
2032
signature="b",
1152
2033
access="readwrite")
1153
2034
def Enabled_dbus_property(self, value=None):
1154
2035
if value is None: # get
1157
2038
self.enable()
1158
2039
else:
1159
2040
self.disable()
1160
2041
1161
2042
# LastCheckedOK - property
1162
@dbus_service_property(_interface, signature="s",
2043
@dbus_service_property(_interface,
2044
signature="s",
1163
2045
access="readwrite")
1164
2046
def LastCheckedOK_dbus_property(self, value=None):
1165
2047
if value is not None:
1166
2048
self.checked_ok()
1167
2049
return
1168
2050
return datetime_to_dbus(self.last_checked_ok)
1169
2051
2052
# LastCheckerStatus - property
2053
@dbus_service_property(_interface, signature="n", access="read")
2054
def LastCheckerStatus_dbus_property(self):
2055
return dbus.Int16(self.last_checker_status)
2056
1170
2057
# Expires - property
1171
2058
@dbus_service_property(_interface, signature="s", access="read")
1172
2059
def Expires_dbus_property(self):
1173
2060
return datetime_to_dbus(self.expires)
1174
2061
1175
2062
# LastApprovalRequest - property
1176
2063
@dbus_service_property(_interface, signature="s", access="read")
1177
2064
def LastApprovalRequest_dbus_property(self):
1178
2065
return datetime_to_dbus(self.last_approval_request)
1179
2066
1180
2067
# Timeout - property
1181
@dbus_service_property(_interface, signature="t",
2068
@dbus_service_property(_interface,
2069
signature="t",
1182
2070
access="readwrite")
1183
2071
def Timeout_dbus_property(self, value=None):
1184
2072
if value is None: # get
1185
return dbus.UInt64(self.timeout_milliseconds())
2073
return dbus.UInt64(self.timeout.total_seconds() * 1000)
2074
old_timeout = self.timeout
1186
2075
self.timeout = datetime.timedelta(0, 0, 0, value)
1187
if getattr(self, "disable_initiator_tag", None) is None:
1188
return
1189
# Reschedule timeout
1190
gobject.source_remove(self.disable_initiator_tag)
1191
self.disable_initiator_tag = None
1192
self.expires = None
1193
time_to_die = _timedelta_to_milliseconds((self
1194
.last_checked_ok
1195
+ self.timeout)
1196
- datetime.datetime
1197
.utcnow())
1198
if time_to_die <= 0:
1199
# The timeout has passed
1200
self.disable()
1201
else:
1202
self.expires = (datetime.datetime.utcnow()
1203
+ datetime.timedelta(milliseconds =
1204
time_to_die))
1205
self.disable_initiator_tag = (gobject.timeout_add
1206
(time_to_die, self.disable))
1207
2076
# Reschedule disabling
2077
if self.enabled:
2078
now = datetime.datetime.utcnow()
2079
self.expires += self.timeout - old_timeout
2080
if self.expires <= now:
2081
# The timeout has passed
2082
self.disable()
2083
else:
2084
if (getattr(self, "disable_initiator_tag", None)
2085
is None):
2086
return
2087
GLib.source_remove(self.disable_initiator_tag)
2088
self.disable_initiator_tag = GLib.timeout_add(
2089
int((self.expires - now).total_seconds() * 1000),
2090
self.disable)
2091
1208
2092
# ExtendedTimeout - property
1209
@dbus_service_property(_interface, signature="t",
2093
@dbus_service_property(_interface,
2094
signature="t",
1210
2095
access="readwrite")
1211
2096
def ExtendedTimeout_dbus_property(self, value=None):
1212
2097
if value is None: # get
1213
return dbus.UInt64(self.extended_timeout_milliseconds())
2098
return dbus.UInt64(self.extended_timeout.total_seconds()
2099
* 1000)
1214
2100
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1215
2101
1216
2102
# Interval - property
1217
@dbus_service_property(_interface, signature="t",
2103
@dbus_service_property(_interface,
2104
signature="t",
1218
2105
access="readwrite")
1219
2106
def Interval_dbus_property(self, value=None):
1220
2107
if value is None: # get
1221
return dbus.UInt64(self.interval_milliseconds())
2108
return dbus.UInt64(self.interval.total_seconds() * 1000)
1222
2109
self.interval = datetime.timedelta(0, 0, 0, value)
1223
2110
if getattr(self, "checker_initiator_tag", None) is None:
1224
2111
return
1225
# Reschedule checker run
1226
gobject.source_remove(self.checker_initiator_tag)
1227
self.checker_initiator_tag = (gobject.timeout_add
1228
(value, self.start_checker))
1229
self.start_checker() # Start one now, too
1230
2112
if self.enabled:
2113
# Reschedule checker run
2114
GLib.source_remove(self.checker_initiator_tag)
2115
self.checker_initiator_tag = GLib.timeout_add(
2116
value, self.start_checker)
2117
self.start_checker() # Start one now, too
2118
1231
2119
# Checker - property
1232
@dbus_service_property(_interface, signature="s",
2120
@dbus_service_property(_interface,
2121
signature="s",
1233
2122
access="readwrite")
1234
2123
def Checker_dbus_property(self, value=None):
1235
2124
if value is None: # get
1236
2125
return dbus.String(self.checker_command)
1237
self.checker_command = value
1238
2126
self.checker_command = str(value)
2127
1239
2128
# CheckerRunning - property
1240
@dbus_service_property(_interface, signature="b",
2129
@dbus_service_property(_interface,
2130
signature="b",
1241
2131
access="readwrite")
1242
2132
def CheckerRunning_dbus_property(self, value=None):
1243
2133
if value is None: # get
1246
2136
self.start_checker()
1247
2137
else:
1248
2138
self.stop_checker()
1249
2139
1250
2140
# ObjectPath - property
2141
@dbus_annotations(
2142
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
2143
"org.freedesktop.DBus.Deprecated": "true"})
1251
2144
@dbus_service_property(_interface, signature="o", access="read")
1252
2145
def ObjectPath_dbus_property(self):
1253
return self.dbus_object_path # is already a dbus.ObjectPath
1254
2146
return self.dbus_object_path # is already a dbus.ObjectPath
2147
1255
2148
# Secret = property
1256
@dbus_service_property(_interface, signature="ay",
1257
access="write", byte_arrays=True)
2149
@dbus_annotations(
2150
{"org.freedesktop.DBus.Property.EmitsChangedSignal":
2151
"invalidates"})
2152
@dbus_service_property(_interface,
2153
signature="ay",
2154
access="write",
2155
byte_arrays=True)
1258
2156
def Secret_dbus_property(self, value):
1259
self.secret = str(value)
1260
2157
self.secret = bytes(value)
2158
1261
2159
del _interface
1262
2160
1263
2161
1266
2164
self._pipe = child_pipe
1267
2165
self._pipe.send(('init', fpr, address))
1268
2166
if not self._pipe.recv():
1269
raise KeyError()
1270
2167
raise KeyError(fpr)
2168
1271
2169
def __getattribute__(self, name):
1272
if(name == '_pipe'):
2170
if name == '_pipe':
1273
2171
return super(ProxyClient, self).__getattribute__(name)
1274
2172
self._pipe.send(('getattr', name))
1275
2173
data = self._pipe.recv()
1276
2174
if data[0] == 'data':
1277
2175
return data[1]
1278
2176
if data[0] == 'function':
2177
1279
2178
def func(*args, **kwargs):
1280
2179
self._pipe.send(('funcall', name, args, kwargs))
1281
2180
return self._pipe.recv()[1]
2181
1282
2182
return func
1283
2183
1284
2184
def __setattr__(self, name, value):
1285
if(name == '_pipe'):
2185
if name == '_pipe':
1286
2186
return super(ProxyClient, self).__setattr__(name, value)
1287
2187
self._pipe.send(('setattr', name, value))
1288
2188
1289
class ClientDBusTransitional(ClientDBus):
1290
__metaclass__ = AlternateDBusNamesMetaclass
1291
2189
1292
2190
class ClientHandler(socketserver.BaseRequestHandler, object):
1293
2191
"""A class to handle client connections.
1294
2192
1295
2193
Instantiated once for each connection to handle it.
1296
2194
Note: This will run in its own forked process."""
1297
2195
1298
2196
def handle(self):
1299
2197
with contextlib.closing(self.server.child_pipe) as child_pipe:
1300
2198
logger.info("TCP connection from: %s",
1301
unicode(self.client_address))
2199
str(self.client_address))
1302
2200
logger.debug("Pipe FD: %d",
1303
2201
self.server.child_pipe.fileno())
1304
1305
session = (gnutls.connection
1306
.ClientSession(self.request,
1307
gnutls.connection
1308
.X509Credentials()))
1309
1310
# Note: gnutls.connection.X509Credentials is really a
1311
# generic GnuTLS certificate credentials object so long as
1312
# no X.509 keys are added to it. Therefore, we can use it
1313
# here despite using OpenPGP certificates.
1314
1315
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1316
# "+AES-256-CBC", "+SHA1",
1317
# "+COMP-NULL", "+CTYPE-OPENPGP",
1318
# "+DHE-DSS"))
2202
2203
session = gnutls.ClientSession(self.request)
2204
2205
# priority = ':'.join(("NONE", "+VERS-TLS1.1",
2206
# "+AES-256-CBC", "+SHA1",
2207
# "+COMP-NULL", "+CTYPE-OPENPGP",
2208
# "+DHE-DSS"))
1319
2209
# Use a fallback default, since this MUST be set.
1320
2210
priority = self.server.gnutls_priority
1321
2211
if priority is None:
1322
2212
priority = "NORMAL"
1323
(gnutls.library.functions
1324
.gnutls_priority_set_direct(session._c_object,
1325
priority, None))
1326
2213
gnutls.priority_set_direct(session._c_object,
2214
priority.encode("utf-8"),
2215
None)
2216
1327
2217
# Start communication using the Mandos protocol
1328
2218
# Get protocol number
1329
2219
line = self.request.makefile().readline()
1330
2220
logger.debug("Protocol version: %r", line)
1331
2221
try:
1332
2222
if int(line.strip().split()[0]) > 1:
1333
raise RuntimeError
2223
raise RuntimeError(line)
1334
2224
except (ValueError, IndexError, RuntimeError) as error:
1335
2225
logger.error("Unknown protocol version: %s", error)
1336
2226
return
1337
2227
1338
2228
# Start GnuTLS connection
1339
2229
try:
1340
2230
session.handshake()
1341
except gnutls.errors.GNUTLSError as error:
2231
except gnutls.Error as error:
1342
2232
logger.warning("Handshake failed: %s", error)
1343
2233
# Do not run session.bye() here: the session is not
1344
2234
# established. Just abandon the request.
1345
2235
return
1346
2236
logger.debug("Handshake succeeded")
1347
2237
1348
2238
approval_required = False
1349
2239
try:
1350
2240
try:
1351
fpr = self.fingerprint(self.peer_certificate
1352
(session))
1353
except (TypeError,
1354
gnutls.errors.GNUTLSError) as error:
2241
fpr = self.fingerprint(
2242
self.peer_certificate(session))
2243
except (TypeError, gnutls.Error) as error:
1355
2244
logger.warning("Bad certificate: %s", error)
1356
2245
return
1357
2246
logger.debug("Fingerprint: %s", fpr)
1358
2247
1359
2248
try:
1360
2249
client = ProxyClient(child_pipe, fpr,
1361
2250
self.client_address)
1362
2251
except KeyError:
1363
2252
return
1364
2253
1365
2254
if client.approval_delay:
1366
2255
delay = client.approval_delay
1367
2256
client.approvals_pending += 1
1368
2257
approval_required = True
1369
2258
1370
2259
while True:
1371
2260
if not client.enabled:
1372
2261
logger.info("Client %s is disabled",
1373
client.name)
2262
client.name)
1374
2263
if self.server.use_dbus:
1375
2264
# Emit D-Bus signal
1376
2265
client.Rejected("Disabled")
1377
2266
return
1378
1379
if client._approved or not client.approval_delay:
1380
#We are approved or approval is disabled
2267
2268
if client.approved or not client.approval_delay:
2269
# We are approved or approval is disabled
1381
2270
break
1382
elif client._approved is None:
2271
elif client.approved is None:
1383
2272
logger.info("Client %s needs approval",
1384
2273
client.name)
1385
2274
if self.server.use_dbus:
1386
2275
# Emit D-Bus signal
1387
2276
client.NeedApproval(
1388
client.approval_delay_milliseconds(),
1389
client.approved_by_default)
2277
client.approval_delay.total_seconds()
2278
* 1000, client.approved_by_default)
1390
2279
else:
1391
2280
logger.warning("Client %s was not approved",
1392
2281
client.name)
1394
2283
# Emit D-Bus signal
1395
2284
client.Rejected("Denied")
1396
2285
return
1397
1398
#wait until timeout or approved
2286
2287
# wait until timeout or approved
1399
2288
time = datetime.datetime.now()
1400
2289
client.changedstate.acquire()
1401
(client.changedstate.wait
1402
(float(client._timedelta_to_milliseconds(delay)
1403
/ 1000)))
2290
client.changedstate.wait(delay.total_seconds())
1404
2291
client.changedstate.release()
1405
2292
time2 = datetime.datetime.now()
1406
2293
if (time2 - time) >= delay:
1416
2303
break
1417
2304
else:
1418
2305
delay -= time2 - time
1419
1420
sent_size = 0
1421
while sent_size < len(client.secret):
1422
try:
1423
sent = session.send(client.secret[sent_size:])
1424
except gnutls.errors.GNUTLSError as error:
1425
logger.warning("gnutls send failed")
1426
return
1427
logger.debug("Sent: %d, remaining: %d",
1428
sent, len(client.secret)
1429
- (sent_size + sent))
1430
sent_size += sent
1431
2306
2307
try:
2308
session.send(client.secret)
2309
except gnutls.Error as error:
2310
logger.warning("gnutls send failed",
2311
exc_info=error)
2312
return
2313
1432
2314
logger.info("Sending secret to %s", client.name)
1433
2315
# bump the timeout using extended_timeout
1434
client.checked_ok(client.extended_timeout)
2316
client.bump_timeout(client.extended_timeout)
1435
2317
if self.server.use_dbus:
1436
2318
# Emit D-Bus signal
1437
2319
client.GotSecret()
1438
2320
1439
2321
finally:
1440
2322
if approval_required:
1441
2323
client.approvals_pending -= 1
1442
2324
try:
1443
2325
session.bye()
1444
except gnutls.errors.GNUTLSError as error:
1445
logger.warning("GnuTLS bye failed")
1446
2326
except gnutls.Error as error:
2327
logger.warning("GnuTLS bye failed",
2328
exc_info=error)
2329
1447
2330
@staticmethod
1448
2331
def peer_certificate(session):
1449
2332
"Return the peer's OpenPGP certificate as a bytestring"
1450
2333
# If not an OpenPGP certificate...
1451
if (gnutls.library.functions
1452
.gnutls_certificate_type_get(session._c_object)
1453
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1454
# ...do the normal thing
1455
return session.peer_certificate
2334
if (gnutls.certificate_type_get(session._c_object)
2335
!= gnutls.CRT_OPENPGP):
2336
# ...return invalid data
2337
return b""
1456
2338
list_size = ctypes.c_uint(1)
1457
cert_list = (gnutls.library.functions
1458
.gnutls_certificate_get_peers
2339
cert_list = (gnutls.certificate_get_peers
1459
2340
(session._c_object, ctypes.byref(list_size)))
1460
2341
if not bool(cert_list) and list_size.value != 0:
1461
raise gnutls.errors.GNUTLSError("error getting peer"
1462
" certificate")
2342
raise gnutls.Error("error getting peer certificate")
1463
2343
if list_size.value == 0:
1464
2344
return None
1465
2345
cert = cert_list[0]
1466
2346
return ctypes.string_at(cert.data, cert.size)
1467
2347
1468
2348
@staticmethod
1469
2349
def fingerprint(openpgp):
1470
2350
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1471
2351
# New GnuTLS "datum" with the OpenPGP public key
1472
datum = (gnutls.library.types
1473
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1474
ctypes.POINTER
1475
(ctypes.c_ubyte)),
1476
ctypes.c_uint(len(openpgp))))
2352
datum = gnutls.datum_t(
2353
ctypes.cast(ctypes.c_char_p(openpgp),
2354
ctypes.POINTER(ctypes.c_ubyte)),
2355
ctypes.c_uint(len(openpgp)))
1477
2356
# New empty GnuTLS certificate
1478
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1479
(gnutls.library.functions
1480
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
2357
crt = gnutls.openpgp_crt_t()
2358
gnutls.openpgp_crt_init(ctypes.byref(crt))
1481
2359
# Import the OpenPGP public key into the certificate
1482
(gnutls.library.functions
1483
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1484
gnutls.library.constants
1485
.GNUTLS_OPENPGP_FMT_RAW))
2360
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2361
gnutls.OPENPGP_FMT_RAW)
1486
2362
# Verify the self signature in the key
1487
2363
crtverify = ctypes.c_uint()
1488
(gnutls.library.functions
1489
.gnutls_openpgp_crt_verify_self(crt, 0,
1490
ctypes.byref(crtverify)))
2364
gnutls.openpgp_crt_verify_self(crt, 0,
2365
ctypes.byref(crtverify))
1491
2366
if crtverify.value != 0:
1492
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1493
raise (gnutls.errors.CertificateSecurityError
1494
("Verify failed"))
2367
gnutls.openpgp_crt_deinit(crt)
2368
raise gnutls.CertificateSecurityError("Verify failed")
1495
2369
# New buffer for the fingerprint
1496
2370
buf = ctypes.create_string_buffer(20)
1497
2371
buf_len = ctypes.c_size_t()
1498
2372
# Get the fingerprint from the certificate into the buffer
1499
(gnutls.library.functions
1500
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1501
ctypes.byref(buf_len)))
2373
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2374
ctypes.byref(buf_len))
1502
2375
# Deinit the certificate
1503
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2376
gnutls.openpgp_crt_deinit(crt)
1504
2377
# Convert the buffer to a Python bytestring
1505
2378
fpr = ctypes.string_at(buf, buf_len.value)
1506
2379
# Convert the bytestring to hexadecimal notation
1507
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
2380
hex_fpr = binascii.hexlify(fpr).upper()
1508
2381
return hex_fpr
1509
2382
1510
2383
1511
2384
class MultiprocessingMixIn(object):
1512
2385
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2386
1513
2387
def sub_process_main(self, request, address):
1514
2388
try:
1515
2389
self.finish_request(request, address)
1516
except:
2390
except Exception:
1517
2391
self.handle_error(request, address)
1518
2392
self.close_request(request)
1519
2393
1520
2394
def process_request(self, request, address):
1521
2395
"""Start a new process to process the request."""
1522
proc = multiprocessing.Process(target = self.sub_process_main,
1523
args = (request,
1524
address))
2396
proc = multiprocessing.Process(target=self.sub_process_main,
2397
args=(request, address))
1525
2398
proc.start()
1526
2399
return proc
1527
2400
1528
2401
1529
2402
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1530
2403
""" adds a pipe to the MixIn """
2404
1531
2405
def process_request(self, request, client_address):
1532
2406
"""Overrides and wraps the original process_request().
1533
2407
1534
2408
This function creates a new pipe in self.pipe
1535
2409
"""
1536
2410
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1537
2411
1538
2412
proc = MultiprocessingMixIn.process_request(self, request,
1539
2413
client_address)
1540
2414
self.child_pipe.close()
1541
2415
self.add_pipe(parent_pipe, proc)
1542
2416
1543
2417
def add_pipe(self, parent_pipe, proc):
1544
2418
"""Dummy function; override as necessary"""
1545
raise NotImplementedError
2419
raise NotImplementedError()
1546
2420
1547
2421
1548
2422
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1549
2423
socketserver.TCPServer, object):
1550
2424
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1551
2425
1552
2426
Attributes:
1553
2427
enabled: Boolean; whether this server is activated yet
1554
2428
interface: None or a network interface name (string)
1555
2429
use_ipv6: Boolean; to use IPv6 or not
1556
2430
"""
2431
1557
2432
def __init__(self, server_address, RequestHandlerClass,
1558
interface=None, use_ipv6=True):
2433
interface=None,
2434
use_ipv6=True,
2435
socketfd=None):
2436
"""If socketfd is set, use that file descriptor instead of
2437
creating a new one with socket.socket().
2438
"""
1559
2439
self.interface = interface
1560
2440
if use_ipv6:
1561
2441
self.address_family = socket.AF_INET6
2442
if socketfd is not None:
2443
# Save the file descriptor
2444
self.socketfd = socketfd
2445
# Save the original socket.socket() function
2446
self.socket_socket = socket.socket
2447
2448
# To implement --socket, we monkey patch socket.socket.
2449
#
2450
# (When socketserver.TCPServer is a new-style class, we
2451
# could make self.socket into a property instead of monkey
2452
# patching socket.socket.)
2453
#
2454
# Create a one-time-only replacement for socket.socket()
2455
@functools.wraps(socket.socket)
2456
def socket_wrapper(*args, **kwargs):
2457
# Restore original function so subsequent calls are
2458
# not affected.
2459
socket.socket = self.socket_socket
2460
del self.socket_socket
2461
# This time only, return a new socket object from the
2462
# saved file descriptor.
2463
return socket.fromfd(self.socketfd, *args, **kwargs)
2464
# Replace socket.socket() function with wrapper
2465
socket.socket = socket_wrapper
2466
# The socketserver.TCPServer.__init__ will call
2467
# socket.socket(), which might be our replacement,
2468
# socket_wrapper(), if socketfd was set.
1562
2469
socketserver.TCPServer.__init__(self, server_address,
1563
2470
RequestHandlerClass)
2471
1564
2472
def server_bind(self):
1565
2473
"""This overrides the normal server_bind() function
1566
2474
to bind to an interface if one was specified, and also NOT to
1567
2475
bind to an address or port if they were not specified."""
2476
global SO_BINDTODEVICE
1568
2477
if self.interface is not None:
1569
2478
if SO_BINDTODEVICE is None:
1570
logger.error("SO_BINDTODEVICE does not exist;"
1571
" cannot bind to interface %s",
1572
self.interface)
1573
else:
1574
try:
1575
self.socket.setsockopt(socket.SOL_SOCKET,
1576
SO_BINDTODEVICE,
1577
str(self.interface
1578
+ '\0'))
1579
except socket.error as error:
1580
if error[0] == errno.EPERM:
1581
logger.error("No permission to"
1582
" bind to interface %s",
1583
self.interface)
1584
elif error[0] == errno.ENOPROTOOPT:
1585
logger.error("SO_BINDTODEVICE not available;"
1586
" cannot bind to interface %s",
1587
self.interface)
1588
else:
1589
raise
2479
# Fall back to a hard-coded value which seems to be
2480
# common enough.
2481
logger.warning("SO_BINDTODEVICE not found, trying 25")
2482
SO_BINDTODEVICE = 25
2483
try:
2484
self.socket.setsockopt(
2485
socket.SOL_SOCKET, SO_BINDTODEVICE,
2486
(self.interface + "\0").encode("utf-8"))
2487
except socket.error as error:
2488
if error.errno == errno.EPERM:
2489
logger.error("No permission to bind to"
2490
" interface %s", self.interface)
2491
elif error.errno == errno.ENOPROTOOPT:
2492
logger.error("SO_BINDTODEVICE not available;"
2493
" cannot bind to interface %s",
2494
self.interface)
2495
elif error.errno == errno.ENODEV:
2496
logger.error("Interface %s does not exist,"
2497
" cannot bind", self.interface)
2498
else:
2499
raise
1590
2500
# Only bind(2) the socket if we really need to.
1591
2501
if self.server_address[0] or self.server_address[1]:
1592
2502
if not self.server_address[0]:
1593
2503
if self.address_family == socket.AF_INET6:
1594
any_address = "::" # in6addr_any
2504
any_address = "::" # in6addr_any
1595
2505
else:
1596
any_address = socket.INADDR_ANY
2506
any_address = "0.0.0.0" # INADDR_ANY
1597
2507
self.server_address = (any_address,
1598
2508
self.server_address[1])
1599
2509
elif not self.server_address[1]:
1600
self.server_address = (self.server_address[0],
1601
0)
2510
self.server_address = (self.server_address[0], 0)
1602
2511
# if self.interface:
1603
2512
# self.server_address = (self.server_address[0],
1604
2513
# 0, # port
1610
2519
1611
2520
class MandosServer(IPv6_TCPServer):
1612
2521
"""Mandos server.
1613
2522
1614
2523
Attributes:
1615
2524
clients: set of Client objects
1616
2525
gnutls_priority GnuTLS priority string
1617
2526
use_dbus: Boolean; to emit D-Bus signals or not
1618
1619
Assumes a gobject.MainLoop event loop.
2527
2528
Assumes a GLib.MainLoop event loop.
1620
2529
"""
2530
1621
2531
def __init__(self, server_address, RequestHandlerClass,
1622
interface=None, use_ipv6=True, clients=None,
1623
gnutls_priority=None, use_dbus=True):
2532
interface=None,
2533
use_ipv6=True,
2534
clients=None,
2535
gnutls_priority=None,
2536
use_dbus=True,
2537
socketfd=None):
1624
2538
self.enabled = False
1625
2539
self.clients = clients
1626
2540
if self.clients is None:
1627
self.clients = set()
2541
self.clients = {}
1628
2542
self.use_dbus = use_dbus
1629
2543
self.gnutls_priority = gnutls_priority
1630
2544
IPv6_TCPServer.__init__(self, server_address,
1631
2545
RequestHandlerClass,
1632
interface = interface,
1633
use_ipv6 = use_ipv6)
2546
interface=interface,
2547
use_ipv6=use_ipv6,
2548
socketfd=socketfd)
2549
1634
2550
def server_activate(self):
1635
2551
if self.enabled:
1636
2552
return socketserver.TCPServer.server_activate(self)
1637
2553
1638
2554
def enable(self):
1639
2555
self.enabled = True
1640
2556
1641
2557
def add_pipe(self, parent_pipe, proc):
1642
2558
# Call "handle_ipc" for both data and EOF events
1643
gobject.io_add_watch(parent_pipe.fileno(),
1644
gobject.IO_IN | gobject.IO_HUP,
1645
functools.partial(self.handle_ipc,
1646
parent_pipe =
1647
parent_pipe,
1648
proc = proc))
1649
1650
def handle_ipc(self, source, condition, parent_pipe=None,
1651
proc = None, client_object=None):
1652
condition_names = {
1653
gobject.IO_IN: "IN", # There is data to read.
1654
gobject.IO_OUT: "OUT", # Data can be written (without
1655
# blocking).
1656
gobject.IO_PRI: "PRI", # There is urgent data to read.
1657
gobject.IO_ERR: "ERR", # Error condition.
1658
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1659
# broken, usually for pipes and
1660
# sockets).
1661
}
1662
conditions_string = ' | '.join(name
1663
for cond, name in
1664
condition_names.iteritems()
1665
if cond & condition)
2559
GLib.io_add_watch(
2560
parent_pipe.fileno(),
2561
GLib.IO_IN | GLib.IO_HUP,
2562
functools.partial(self.handle_ipc,
2563
parent_pipe=parent_pipe,
2564
proc=proc))
2565
2566
def handle_ipc(self, source, condition,
2567
parent_pipe=None,
2568
proc=None,
2569
client_object=None):
1666
2570
# error, or the other end of multiprocessing.Pipe has closed
1667
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
2571
if condition & (GLib.IO_ERR | GLib.IO_HUP):
1668
2572
# Wait for other process to exit
1669
2573
proc.join()
1670
2574
return False
1671
2575
1672
2576
# Read a request from the child
1673
2577
request = parent_pipe.recv()
1674
2578
command = request[0]
1675
2579
1676
2580
if command == 'init':
1677
fpr = request[1]
2581
fpr = request[1].decode("ascii")
1678
2582
address = request[2]
1679
1680
for c in self.clients:
2583
2584
for c in self.clients.values():
1681
2585
if c.fingerprint == fpr:
1682
2586
client = c
1683
2587
break
1690
2594
address[0])
1691
2595
parent_pipe.send(False)
1692
2596
return False
1693
1694
gobject.io_add_watch(parent_pipe.fileno(),
1695
gobject.IO_IN | gobject.IO_HUP,
1696
functools.partial(self.handle_ipc,
1697
parent_pipe =
1698
parent_pipe,
1699
proc = proc,
1700
client_object =
1701
client))
2597
2598
GLib.io_add_watch(
2599
parent_pipe.fileno(),
2600
GLib.IO_IN | GLib.IO_HUP,
2601
functools.partial(self.handle_ipc,
2602
parent_pipe=parent_pipe,
2603
proc=proc,
2604
client_object=client))
1702
2605
parent_pipe.send(True)
1703
2606
# remove the old hook in favor of the new above hook on
1704
2607
# same fileno
1707
2610
funcname = request[1]
1708
2611
args = request[2]
1709
2612
kwargs = request[3]
1710
2613
1711
2614
parent_pipe.send(('data', getattr(client_object,
1712
2615
funcname)(*args,
1713
**kwargs)))
1714
2616
**kwargs)))
2617
1715
2618
if command == 'getattr':
1716
2619
attrname = request[1]
1717
if callable(client_object.__getattribute__(attrname)):
1718
parent_pipe.send(('function',))
2620
if isinstance(client_object.__getattribute__(attrname),
2621
collections.Callable):
2622
parent_pipe.send(('function', ))
1719
2623
else:
1720
parent_pipe.send(('data', client_object
1721
.__getattribute__(attrname)))
1722
2624
parent_pipe.send((
2625
'data', client_object.__getattribute__(attrname)))
2626
1723
2627
if command == 'setattr':
1724
2628
attrname = request[1]
1725
2629
value = request[2]
1726
2630
setattr(client_object, attrname, value)
1727
2631
1728
2632
return True
1729
2633
1730
2634
2635
def rfc3339_duration_to_delta(duration):
2636
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2637
2638
>>> rfc3339_duration_to_delta("P7D")
2639
datetime.timedelta(7)
2640
>>> rfc3339_duration_to_delta("PT60S")
2641
datetime.timedelta(0, 60)
2642
>>> rfc3339_duration_to_delta("PT60M")
2643
datetime.timedelta(0, 3600)
2644
>>> rfc3339_duration_to_delta("PT24H")
2645
datetime.timedelta(1)
2646
>>> rfc3339_duration_to_delta("P1W")
2647
datetime.timedelta(7)
2648
>>> rfc3339_duration_to_delta("PT5M30S")
2649
datetime.timedelta(0, 330)
2650
>>> rfc3339_duration_to_delta("P1DT3M20S")
2651
datetime.timedelta(1, 200)
2652
"""
2653
2654
# Parsing an RFC 3339 duration with regular expressions is not
2655
# possible - there would have to be multiple places for the same
2656
# values, like seconds. The current code, while more esoteric, is
2657
# cleaner without depending on a parsing library. If Python had a
2658
# built-in library for parsing we would use it, but we'd like to
2659
# avoid excessive use of external libraries.
2660
2661
# New type for defining tokens, syntax, and semantics all-in-one
2662
Token = collections.namedtuple("Token", (
2663
"regexp", # To match token; if "value" is not None, must have
2664
# a "group" containing digits
2665
"value", # datetime.timedelta or None
2666
"followers")) # Tokens valid after this token
2667
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2668
# the "duration" ABNF definition in RFC 3339, Appendix A.
2669
token_end = Token(re.compile(r"$"), None, frozenset())
2670
token_second = Token(re.compile(r"(\d+)S"),
2671
datetime.timedelta(seconds=1),
2672
frozenset((token_end, )))
2673
token_minute = Token(re.compile(r"(\d+)M"),
2674
datetime.timedelta(minutes=1),
2675
frozenset((token_second, token_end)))
2676
token_hour = Token(re.compile(r"(\d+)H"),
2677
datetime.timedelta(hours=1),
2678
frozenset((token_minute, token_end)))
2679
token_time = Token(re.compile(r"T"),
2680
None,
2681
frozenset((token_hour, token_minute,
2682
token_second)))
2683
token_day = Token(re.compile(r"(\d+)D"),
2684
datetime.timedelta(days=1),
2685
frozenset((token_time, token_end)))
2686
token_month = Token(re.compile(r"(\d+)M"),
2687
datetime.timedelta(weeks=4),
2688
frozenset((token_day, token_end)))
2689
token_year = Token(re.compile(r"(\d+)Y"),
2690
datetime.timedelta(weeks=52),
2691
frozenset((token_month, token_end)))
2692
token_week = Token(re.compile(r"(\d+)W"),
2693
datetime.timedelta(weeks=1),
2694
frozenset((token_end, )))
2695
token_duration = Token(re.compile(r"P"), None,
2696
frozenset((token_year, token_month,
2697
token_day, token_time,
2698
token_week)))
2699
# Define starting values:
2700
# Value so far
2701
value = datetime.timedelta()
2702
found_token = None
2703
# Following valid tokens
2704
followers = frozenset((token_duration, ))
2705
# String left to parse
2706
s = duration
2707
# Loop until end token is found
2708
while found_token is not token_end:
2709
# Search for any currently valid tokens
2710
for token in followers:
2711
match = token.regexp.match(s)
2712
if match is not None:
2713
# Token found
2714
if token.value is not None:
2715
# Value found, parse digits
2716
factor = int(match.group(1), 10)
2717
# Add to value so far
2718
value += factor * token.value
2719
# Strip token from string
2720
s = token.regexp.sub("", s, 1)
2721
# Go to found token
2722
found_token = token
2723
# Set valid next tokens
2724
followers = found_token.followers
2725
break
2726
else:
2727
# No currently valid tokens were found
2728
raise ValueError("Invalid RFC 3339 duration: {!r}"
2729
.format(duration))
2730
# End token found
2731
return value
2732
2733
1731
2734
def string_to_delta(interval):
1732
2735
"""Parse a string and return a datetime.timedelta
1733
2736
1734
2737
>>> string_to_delta('7d')
1735
2738
datetime.timedelta(7)
1736
2739
>>> string_to_delta('60s')
1744
2747
>>> string_to_delta('5m 30s')
1745
2748
datetime.timedelta(0, 330)
1746
2749
"""
2750
2751
try:
2752
return rfc3339_duration_to_delta(interval)
2753
except ValueError:
2754
pass
2755
1747
2756
timevalue = datetime.timedelta(0)
1748
2757
for s in interval.split():
1749
2758
try:
1750
suffix = unicode(s[-1])
2759
suffix = s[-1]
1751
2760
value = int(s[:-1])
1752
2761
if suffix == "d":
1753
2762
delta = datetime.timedelta(value)
1760
2769
elif suffix == "w":
1761
2770
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1762
2771
else:
1763
raise ValueError("Unknown suffix %r" % suffix)
1764
except (ValueError, IndexError) as e:
2772
raise ValueError("Unknown suffix {!r}".format(suffix))
2773
except IndexError as e:
1765
2774
raise ValueError(*(e.args))
1766
2775
timevalue += delta
1767
2776
return timevalue
1768
2777
1769
2778
1770
def if_nametoindex(interface):
1771
"""Call the C function if_nametoindex(), or equivalent
1772
1773
Note: This function cannot accept a unicode string."""
1774
global if_nametoindex
1775
try:
1776
if_nametoindex = (ctypes.cdll.LoadLibrary
1777
(ctypes.util.find_library("c"))
1778
.if_nametoindex)
1779
except (OSError, AttributeError):
1780
logger.warning("Doing if_nametoindex the hard way")
1781
def if_nametoindex(interface):
1782
"Get an interface index the hard way, i.e. using fcntl()"
1783
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1784
with contextlib.closing(socket.socket()) as s:
1785
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1786
struct.pack(str("16s16x"),
1787
interface))
1788
interface_index = struct.unpack(str("I"),
1789
ifreq[16:20])[0]
1790
return interface_index
1791
return if_nametoindex(interface)
1792
1793
1794
def daemon(nochdir = False, noclose = False):
2779
def daemon(nochdir=False, noclose=False):
1795
2780
"""See daemon(3). Standard BSD Unix function.
1796
2781
1797
2782
This should really exist as os.daemon, but it doesn't (yet)."""
1798
2783
if os.fork():
1799
2784
sys.exit()
1804
2789
sys.exit()
1805
2790
if not noclose:
1806
2791
# Close all standard open file descriptors
1807
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2792
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1808
2793
if not stat.S_ISCHR(os.fstat(null).st_mode):
1809
2794
raise OSError(errno.ENODEV,
1810
"%s not a character device"
1811
% os.path.devnull)
2795
"{} not a character device"
2796
.format(os.devnull))
1812
2797
os.dup2(null, sys.stdin.fileno())
1813
2798
os.dup2(null, sys.stdout.fileno())
1814
2799
os.dup2(null, sys.stderr.fileno())
1817
2802
1818
2803
1819
2804
def main():
1820
2805
1821
2806
##################################################################
1822
2807
# Parsing of options, both command line and config file
1823
2808
1824
2809
parser = argparse.ArgumentParser()
1825
2810
parser.add_argument("-v", "--version", action="version",
1826
version = "%%(prog)s %s" % version,
2811
version="%(prog)s {}".format(version),
1827
2812
help="show version number and exit")
1828
2813
parser.add_argument("-i", "--interface", metavar="IF",
1829
2814
help="Bind to interface IF")
1835
2820
help="Run self-test")
1836
2821
parser.add_argument("--debug", action="store_true",
1837
2822
help="Debug mode; run in foreground and log"
1838
" to terminal")
2823
" to terminal", default=None)
1839
2824
parser.add_argument("--debuglevel", metavar="LEVEL",
1840
2825
help="Debug level for stdout output")
1841
2826
parser.add_argument("--priority", help="GnuTLS"
1848
2833
" files")
1849
2834
parser.add_argument("--no-dbus", action="store_false",
1850
2835
dest="use_dbus", help="Do not provide D-Bus"
1851
" system bus interface")
2836
" system bus interface", default=None)
1852
2837
parser.add_argument("--no-ipv6", action="store_false",
1853
dest="use_ipv6", help="Do not use IPv6")
2838
dest="use_ipv6", help="Do not use IPv6",
2839
default=None)
2840
parser.add_argument("--no-restore", action="store_false",
2841
dest="restore", help="Do not restore stored"
2842
" state", default=None)
2843
parser.add_argument("--socket", type=int,
2844
help="Specify a file descriptor to a network"
2845
" socket to use instead of creating one")
2846
parser.add_argument("--statedir", metavar="DIR",
2847
help="Directory to save/restore state in")
2848
parser.add_argument("--foreground", action="store_true",
2849
help="Run in foreground", default=None)
2850
parser.add_argument("--no-zeroconf", action="store_false",
2851
dest="zeroconf", help="Do not use Zeroconf",
2852
default=None)
2853
1854
2854
options = parser.parse_args()
1855
2855
1856
2856
if options.check:
1857
2857
import doctest
1858
doctest.testmod()
1859
sys.exit()
1860
2858
fail_count, test_count = doctest.testmod()
2859
sys.exit(os.EX_OK if fail_count == 0 else 1)
2860
1861
2861
# Default values for config file for server-global settings
1862
server_defaults = { "interface": "",
1863
"address": "",
1864
"port": "",
1865
"debug": "False",
1866
"priority":
1867
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1868
"servicename": "Mandos",
1869
"use_dbus": "True",
1870
"use_ipv6": "True",
1871
"debuglevel": "",
1872
}
1873
2862
server_defaults = {"interface": "",
2863
"address": "",
2864
"port": "",
2865
"debug": "False",
2866
"priority":
2867
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2868
":+SIGN-DSA-SHA256",
2869
"servicename": "Mandos",
2870
"use_dbus": "True",
2871
"use_ipv6": "True",
2872
"debuglevel": "",
2873
"restore": "True",
2874
"socket": "",
2875
"statedir": "/var/lib/mandos",
2876
"foreground": "False",
2877
"zeroconf": "True",
2878
}
2879
1874
2880
# Parse config file for server-global settings
1875
2881
server_config = configparser.SafeConfigParser(server_defaults)
1876
2882
del server_defaults
1877
server_config.read(os.path.join(options.configdir,
1878
"mandos.conf"))
2883
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1879
2884
# Convert the SafeConfigParser object to a dict
1880
2885
server_settings = server_config.defaults()
1881
2886
# Use the appropriate methods on the non-string config options
1882
for option in ("debug", "use_dbus", "use_ipv6"):
2887
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2888
"foreground", "zeroconf"):
1883
2889
server_settings[option] = server_config.getboolean("DEFAULT",
1884
2890
option)
1885
2891
if server_settings["port"]:
1886
2892
server_settings["port"] = server_config.getint("DEFAULT",
1887
2893
"port")
2894
if server_settings["socket"]:
2895
server_settings["socket"] = server_config.getint("DEFAULT",
2896
"socket")
2897
# Later, stdin will, and stdout and stderr might, be dup'ed
2898
# over with an opened os.devnull. But we don't want this to
2899
# happen with a supplied network socket.
2900
if 0 <= server_settings["socket"] <= 2:
2901
server_settings["socket"] = os.dup(server_settings
2902
["socket"])
1888
2903
del server_config
1889
2904
1890
2905
# Override the settings from the config file with command line
1891
2906
# options, if set.
1892
2907
for option in ("interface", "address", "port", "debug",
1893
"priority", "servicename", "configdir",
1894
"use_dbus", "use_ipv6", "debuglevel"):
2908
"priority", "servicename", "configdir", "use_dbus",
2909
"use_ipv6", "debuglevel", "restore", "statedir",
2910
"socket", "foreground", "zeroconf"):
1895
2911
value = getattr(options, option)
1896
2912
if value is not None:
1897
2913
server_settings[option] = value
1898
2914
del options
1899
2915
# Force all strings to be unicode
1900
2916
for option in server_settings.keys():
1901
if type(server_settings[option]) is str:
1902
server_settings[option] = unicode(server_settings[option])
2917
if isinstance(server_settings[option], bytes):
2918
server_settings[option] = (server_settings[option]
2919
.decode("utf-8"))
2920
# Force all boolean options to be boolean
2921
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2922
"foreground", "zeroconf"):
2923
server_settings[option] = bool(server_settings[option])
2924
# Debug implies foreground
2925
if server_settings["debug"]:
2926
server_settings["foreground"] = True
1903
2927
# Now we have our good server settings in "server_settings"
1904
2928
1905
2929
##################################################################
1906
2930
2931
if (not server_settings["zeroconf"]
2932
and not (server_settings["port"]
2933
or server_settings["socket"] != "")):
2934
parser.error("Needs port or socket to work without Zeroconf")
2935
1907
2936
# For convenience
1908
2937
debug = server_settings["debug"]
1909
2938
debuglevel = server_settings["debuglevel"]
1910
2939
use_dbus = server_settings["use_dbus"]
1911
2940
use_ipv6 = server_settings["use_ipv6"]
1912
2941
stored_state_path = os.path.join(server_settings["statedir"],
2942
stored_state_file)
2943
foreground = server_settings["foreground"]
2944
zeroconf = server_settings["zeroconf"]
2945
2946
if debug:
2947
initlogger(debug, logging.DEBUG)
2948
else:
2949
if not debuglevel:
2950
initlogger(debug)
2951
else:
2952
level = getattr(logging, debuglevel.upper())
2953
initlogger(debug, level)
2954
1913
2955
if server_settings["servicename"] != "Mandos":
1914
syslogger.setFormatter(logging.Formatter
1915
('Mandos (%s) [%%(process)d]:'
1916
' %%(levelname)s: %%(message)s'
1917
% server_settings["servicename"]))
1918
2956
syslogger.setFormatter(
2957
logging.Formatter('Mandos ({}) [%(process)d]:'
2958
' %(levelname)s: %(message)s'.format(
2959
server_settings["servicename"])))
2960
1919
2961
# Parse config file with clients
1920
client_defaults = { "timeout": "5m",
1921
"extended_timeout": "15m",
1922
"interval": "2m",
1923
"checker": "fping -q -- %%(host)s",
1924
"host": "",
1925
"approval_delay": "0s",
1926
"approval_duration": "1s",
1927
}
1928
client_config = configparser.SafeConfigParser(client_defaults)
2962
client_config = configparser.SafeConfigParser(Client
2963
.client_defaults)
1929
2964
client_config.read(os.path.join(server_settings["configdir"],
1930
2965
"clients.conf"))
1931
2966
1932
2967
global mandos_dbus_service
1933
2968
mandos_dbus_service = None
1934
1935
tcp_server = MandosServer((server_settings["address"],
1936
server_settings["port"]),
1937
ClientHandler,
1938
interface=(server_settings["interface"]
1939
or None),
1940
use_ipv6=use_ipv6,
1941
gnutls_priority=
1942
server_settings["priority"],
1943
use_dbus=use_dbus)
1944
if not debug:
1945
pidfilename = "/var/run/mandos.pid"
1946
try:
1947
pidfile = open(pidfilename, "w")
1948
except IOError:
1949
logger.error("Could not open file %r", pidfilename)
1950
1951
try:
1952
uid = pwd.getpwnam("_mandos").pw_uid
1953
gid = pwd.getpwnam("_mandos").pw_gid
1954
except KeyError:
1955
try:
1956
uid = pwd.getpwnam("mandos").pw_uid
1957
gid = pwd.getpwnam("mandos").pw_gid
2969
2970
socketfd = None
2971
if server_settings["socket"] != "":
2972
socketfd = server_settings["socket"]
2973
tcp_server = MandosServer(
2974
(server_settings["address"], server_settings["port"]),
2975
ClientHandler,
2976
interface=(server_settings["interface"] or None),
2977
use_ipv6=use_ipv6,
2978
gnutls_priority=server_settings["priority"],
2979
use_dbus=use_dbus,
2980
socketfd=socketfd)
2981
if not foreground:
2982
pidfilename = "/run/mandos.pid"
2983
if not os.path.isdir("/run/."):
2984
pidfilename = "/var/run/mandos.pid"
2985
pidfile = None
2986
try:
2987
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
2988
except IOError as e:
2989
logger.error("Could not open file %r", pidfilename,
2990
exc_info=e)
2991
2992
for name, group in (("_mandos", "_mandos"),
2993
("mandos", "mandos"),
2994
("nobody", "nogroup")):
2995
try:
2996
uid = pwd.getpwnam(name).pw_uid
2997
gid = pwd.getpwnam(group).pw_gid
2998
break
1958
2999
except KeyError:
1959
try:
1960
uid = pwd.getpwnam("nobody").pw_uid
1961
gid = pwd.getpwnam("nobody").pw_gid
1962
except KeyError:
1963
uid = 65534
1964
gid = 65534
3000
continue
3001
else:
3002
uid = 65534
3003
gid = 65534
1965
3004
try:
1966
3005
os.setgid(gid)
1967
3006
os.setuid(uid)
3007
if debug:
3008
logger.debug("Did setuid/setgid to {}:{}".format(uid,
3009
gid))
1968
3010
except OSError as error:
1969
if error[0] != errno.EPERM:
1970
raise error
1971
1972
if not debug and not debuglevel:
1973
syslogger.setLevel(logging.WARNING)
1974
console.setLevel(logging.WARNING)
1975
if debuglevel:
1976
level = getattr(logging, debuglevel.upper())
1977
syslogger.setLevel(level)
1978
console.setLevel(level)
1979
3011
logger.warning("Failed to setuid/setgid to {}:{}: {}"
3012
.format(uid, gid, os.strerror(error.errno)))
3013
if error.errno != errno.EPERM:
3014
raise
3015
1980
3016
if debug:
1981
3017
# Enable all possible GnuTLS debugging
1982
3018
1983
3019
# "Use a log level over 10 to enable all debugging options."
1984
3020
# - GnuTLS manual
1985
gnutls.library.functions.gnutls_global_set_log_level(11)
1986
1987
@gnutls.library.types.gnutls_log_func
3021
gnutls.global_set_log_level(11)
3022
3023
@gnutls.log_func
1988
3024
def debug_gnutls(level, string):
1989
3025
logger.debug("GnuTLS: %s", string[:-1])
1990
1991
(gnutls.library.functions
1992
.gnutls_global_set_log_function(debug_gnutls))
1993
3026
3027
gnutls.global_set_log_function(debug_gnutls)
3028
1994
3029
# Redirect stdin so all checkers get /dev/null
1995
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
3030
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1996
3031
os.dup2(null, sys.stdin.fileno())
1997
3032
if null > 2:
1998
3033
os.close(null)
1999
else:
2000
# No console logging
2001
logger.removeHandler(console)
2002
3034
2003
3035
# Need to fork before connecting to D-Bus
2004
if not debug:
3036
if not foreground:
2005
3037
# Close all input and output, do double fork, etc.
2006
3038
daemon()
2007
3039
3040
# multiprocessing will use threads, so before we use GLib we need
3041
# to inform GLib that threads will be used.
3042
GLib.threads_init()
3043
2008
3044
global main_loop
2009
3045
# From the Avahi example code
2010
DBusGMainLoop(set_as_default=True )
2011
main_loop = gobject.MainLoop()
3046
DBusGMainLoop(set_as_default=True)
3047
main_loop = GLib.MainLoop()
2012
3048
bus = dbus.SystemBus()
2013
3049
# End of Avahi example code
2014
3050
if use_dbus:
2015
3051
try:
2016
3052
bus_name = dbus.service.BusName("se.recompile.Mandos",
2017
bus, do_not_queue=True)
2018
old_bus_name = (dbus.service.BusName
2019
("se.bsnet.fukt.Mandos", bus,
2020
do_not_queue=True))
2021
except dbus.exceptions.NameExistsException as e:
2022
logger.error(unicode(e) + ", disabling D-Bus")
3053
bus,
3054
do_not_queue=True)
3055
old_bus_name = dbus.service.BusName(
3056
"se.bsnet.fukt.Mandos", bus,
3057
do_not_queue=True)
3058
except dbus.exceptions.DBusException as e:
3059
logger.error("Disabling D-Bus:", exc_info=e)
2023
3060
use_dbus = False
2024
3061
server_settings["use_dbus"] = False
2025
3062
tcp_server.use_dbus = False
2026
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2027
service = AvahiService(name = server_settings["servicename"],
2028
servicetype = "_mandos._tcp",
2029
protocol = protocol, bus = bus)
2030
if server_settings["interface"]:
2031
service.interface = (if_nametoindex
2032
(str(server_settings["interface"])))
2033
3063
if zeroconf:
3064
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3065
service = AvahiServiceToSyslog(
3066
name=server_settings["servicename"],
3067
servicetype="_mandos._tcp",
3068
protocol=protocol,
3069
bus=bus)
3070
if server_settings["interface"]:
3071
service.interface = if_nametoindex(
3072
server_settings["interface"].encode("utf-8"))
3073
2034
3074
global multiprocessing_manager
2035
3075
multiprocessing_manager = multiprocessing.Manager()
2036
3076
2037
3077
client_class = Client
2038
3078
if use_dbus:
2039
client_class = functools.partial(ClientDBusTransitional,
2040
bus = bus)
2041
def client_config_items(config, section):
2042
special_settings = {
2043
"approved_by_default":
2044
lambda: config.getboolean(section,
2045
"approved_by_default"),
2046
}
2047
for name, value in config.items(section):
3079
client_class = functools.partial(ClientDBus, bus=bus)
3080
3081
client_settings = Client.config_parser(client_config)
3082
old_client_settings = {}
3083
clients_data = {}
3084
3085
# This is used to redirect stdout and stderr for checker processes
3086
global wnull
3087
wnull = open(os.devnull, "w") # A writable /dev/null
3088
# Only used if server is running in foreground but not in debug
3089
# mode
3090
if debug or not foreground:
3091
wnull.close()
3092
3093
# Get client data and settings from last running state.
3094
if server_settings["restore"]:
3095
try:
3096
with open(stored_state_path, "rb") as stored_state:
3097
if sys.version_info.major == 2:
3098
clients_data, old_client_settings = pickle.load(
3099
stored_state)
3100
else:
3101
bytes_clients_data, bytes_old_client_settings = (
3102
pickle.load(stored_state, encoding="bytes"))
3103
# Fix bytes to strings
3104
# clients_data
3105
# .keys()
3106
clients_data = {(key.decode("utf-8")
3107
if isinstance(key, bytes)
3108
else key): value
3109
for key, value in
3110
bytes_clients_data.items()}
3111
del bytes_clients_data
3112
for key in clients_data:
3113
value = {(k.decode("utf-8")
3114
if isinstance(k, bytes) else k): v
3115
for k, v in
3116
clients_data[key].items()}
3117
clients_data[key] = value
3118
# .client_structure
3119
value["client_structure"] = [
3120
(s.decode("utf-8")
3121
if isinstance(s, bytes)
3122
else s) for s in
3123
value["client_structure"]]
3124
# .name & .host
3125
for k in ("name", "host"):
3126
if isinstance(value[k], bytes):
3127
value[k] = value[k].decode("utf-8")
3128
# old_client_settings
3129
# .keys()
3130
old_client_settings = {
3131
(key.decode("utf-8")
3132
if isinstance(key, bytes)
3133
else key): value
3134
for key, value in
3135
bytes_old_client_settings.items()}
3136
del bytes_old_client_settings
3137
# .host
3138
for value in old_client_settings.values():
3139
if isinstance(value["host"], bytes):
3140
value["host"] = (value["host"]
3141
.decode("utf-8"))
3142
os.remove(stored_state_path)
3143
except IOError as e:
3144
if e.errno == errno.ENOENT:
3145
logger.warning("Could not load persistent state:"
3146
" {}".format(os.strerror(e.errno)))
3147
else:
3148
logger.critical("Could not load persistent state:",
3149
exc_info=e)
3150
raise
3151
except EOFError as e:
3152
logger.warning("Could not load persistent state: "
3153
"EOFError:",
3154
exc_info=e)
3155
3156
with PGPEngine() as pgp:
3157
for client_name, client in clients_data.items():
3158
# Skip removed clients
3159
if client_name not in client_settings:
3160
continue
3161
3162
# Decide which value to use after restoring saved state.
3163
# We have three different values: Old config file,
3164
# new config file, and saved state.
3165
# New config value takes precedence if it differs from old
3166
# config value, otherwise use saved state.
3167
for name, value in client_settings[client_name].items():
3168
try:
3169
# For each value in new config, check if it
3170
# differs from the old config value (Except for
3171
# the "secret" attribute)
3172
if (name != "secret"
3173
and (value !=
3174
old_client_settings[client_name][name])):
3175
client[name] = value
3176
except KeyError:
3177
pass
3178
3179
# Clients who has passed its expire date can still be
3180
# enabled if its last checker was successful. A Client
3181
# whose checker succeeded before we stored its state is
3182
# assumed to have successfully run all checkers during
3183
# downtime.
3184
if client["enabled"]:
3185
if datetime.datetime.utcnow() >= client["expires"]:
3186
if not client["last_checked_ok"]:
3187
logger.warning(
3188
"disabling client {} - Client never "
3189
"performed a successful checker".format(
3190
client_name))
3191
client["enabled"] = False
3192
elif client["last_checker_status"] != 0:
3193
logger.warning(
3194
"disabling client {} - Client last"
3195
" checker failed with error code"
3196
" {}".format(
3197
client_name,
3198
client["last_checker_status"]))
3199
client["enabled"] = False
3200
else:
3201
client["expires"] = (
3202
datetime.datetime.utcnow()
3203
+ client["timeout"])
3204
logger.debug("Last checker succeeded,"
3205
" keeping {} enabled".format(
3206
client_name))
2048
3207
try:
2049
yield (name, special_settings[name]())
2050
except KeyError:
2051
yield (name, value)
2052
2053
tcp_server.clients.update(set(
2054
client_class(name = section,
2055
config= dict(client_config_items(
2056
client_config, section)))
2057
for section in client_config.sections()))
3208
client["secret"] = pgp.decrypt(
3209
client["encrypted_secret"],
3210
client_settings[client_name]["secret"])
3211
except PGPError:
3212
# If decryption fails, we use secret from new settings
3213
logger.debug("Failed to decrypt {} old secret".format(
3214
client_name))
3215
client["secret"] = (client_settings[client_name]
3216
["secret"])
3217
3218
# Add/remove clients based on new changes made to config
3219
for client_name in (set(old_client_settings)
3220
- set(client_settings)):
3221
del clients_data[client_name]
3222
for client_name in (set(client_settings)
3223
- set(old_client_settings)):
3224
clients_data[client_name] = client_settings[client_name]
3225
3226
# Create all client objects
3227
for client_name, client in clients_data.items():
3228
tcp_server.clients[client_name] = client_class(
3229
name=client_name,
3230
settings=client,
3231
server_settings=server_settings)
3232
2058
3233
if not tcp_server.clients:
2059
3234
logger.warning("No clients defined")
2060
2061
if not debug:
2062
try:
2063
with pidfile:
2064
pid = os.getpid()
2065
pidfile.write(str(pid) + "\n".encode("utf-8"))
2066
del pidfile
2067
except IOError:
2068
logger.error("Could not write to file %r with PID %d",
2069
pidfilename, pid)
2070
except NameError:
2071
# "pidfile" was never created
2072
pass
3235
3236
if not foreground:
3237
if pidfile is not None:
3238
pid = os.getpid()
3239
try:
3240
with pidfile:
3241
print(pid, file=pidfile)
3242
except IOError:
3243
logger.error("Could not write to file %r with PID %d",
3244
pidfilename, pid)
3245
del pidfile
2073
3246
del pidfilename
2074
2075
signal.signal(signal.SIGINT, signal.SIG_IGN)
2076
2077
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2078
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2079
3247
3248
for termsig in (signal.SIGHUP, signal.SIGTERM):
3249
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3250
lambda: main_loop.quit() and False)
3251
2080
3252
if use_dbus:
2081
class MandosDBusService(dbus.service.Object):
3253
3254
@alternate_dbus_interfaces(
3255
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3256
class MandosDBusService(DBusObjectWithObjectManager):
2082
3257
"""A D-Bus proxy object"""
3258
2083
3259
def __init__(self):
2084
3260
dbus.service.Object.__init__(self, bus, "/")
3261
2085
3262
_interface = "se.recompile.Mandos"
2086
3263
2087
3264
@dbus.service.signal(_interface, signature="o")
2088
3265
def ClientAdded(self, objpath):
2089
3266
"D-Bus signal"
2090
3267
pass
2091
3268
2092
3269
@dbus.service.signal(_interface, signature="ss")
2093
3270
def ClientNotFound(self, fingerprint, address):
2094
3271
"D-Bus signal"
2095
3272
pass
2096
3273
3274
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3275
"true"})
2097
3276
@dbus.service.signal(_interface, signature="os")
2098
3277
def ClientRemoved(self, objpath, name):
2099
3278
"D-Bus signal"
2100
3279
pass
2101
3280
3281
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3282
"true"})
2102
3283
@dbus.service.method(_interface, out_signature="ao")
2103
3284
def GetAllClients(self):
2104
3285
"D-Bus method"
2105
return dbus.Array(c.dbus_object_path
2106
for c in tcp_server.clients)
2107
3286
return dbus.Array(c.dbus_object_path for c in
3287
tcp_server.clients.values())
3288
3289
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3290
"true"})
2108
3291
@dbus.service.method(_interface,
2109
3292
out_signature="a{oa{sv}}")
2110
3293
def GetAllClientsWithProperties(self):
2111
3294
"D-Bus method"
2112
3295
return dbus.Dictionary(
2113
((c.dbus_object_path, c.GetAll(""))
2114
for c in tcp_server.clients),
3296
{c.dbus_object_path: c.GetAll(
3297
"se.recompile.Mandos.Client")
3298
for c in tcp_server.clients.values()},
2115
3299
signature="oa{sv}")
2116
3300
2117
3301
@dbus.service.method(_interface, in_signature="o")
2118
3302
def RemoveClient(self, object_path):
2119
3303
"D-Bus method"
2120
for c in tcp_server.clients:
3304
for c in tcp_server.clients.values():
2121
3305
if c.dbus_object_path == object_path:
2122
tcp_server.clients.remove(c)
3306
del tcp_server.clients[c.name]
2123
3307
c.remove_from_connection()
2124
# Don't signal anything except ClientRemoved
3308
# Don't signal the disabling
2125
3309
c.disable(quiet=True)
2126
# Emit D-Bus signal
2127
self.ClientRemoved(object_path, c.name)
3310
# Emit D-Bus signal for removal
3311
self.client_removed_signal(c)
2128
3312
return
2129
3313
raise KeyError(object_path)
2130
3314
2131
3315
del _interface
2132
2133
class MandosDBusServiceTransitional(MandosDBusService):
2134
__metaclass__ = AlternateDBusNamesMetaclass
2135
mandos_dbus_service = MandosDBusServiceTransitional()
2136
3316
3317
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3318
out_signature="a{oa{sa{sv}}}")
3319
def GetManagedObjects(self):
3320
"""D-Bus method"""
3321
return dbus.Dictionary(
3322
{client.dbus_object_path:
3323
dbus.Dictionary(
3324
{interface: client.GetAll(interface)
3325
for interface in
3326
client._get_all_interface_names()})
3327
for client in tcp_server.clients.values()})
3328
3329
def client_added_signal(self, client):
3330
"""Send the new standard signal and the old signal"""
3331
if use_dbus:
3332
# New standard signal
3333
self.InterfacesAdded(
3334
client.dbus_object_path,
3335
dbus.Dictionary(
3336
{interface: client.GetAll(interface)
3337
for interface in
3338
client._get_all_interface_names()}))
3339
# Old signal
3340
self.ClientAdded(client.dbus_object_path)
3341
3342
def client_removed_signal(self, client):
3343
"""Send the new standard signal and the old signal"""
3344
if use_dbus:
3345
# New standard signal
3346
self.InterfacesRemoved(
3347
client.dbus_object_path,
3348
client._get_all_interface_names())
3349
# Old signal
3350
self.ClientRemoved(client.dbus_object_path,
3351
client.name)
3352
3353
mandos_dbus_service = MandosDBusService()
3354
3355
# Save modules to variables to exempt the modules from being
3356
# unloaded before the function registered with atexit() is run.
3357
mp = multiprocessing
3358
wn = wnull
3359
2137
3360
def cleanup():
2138
3361
"Cleanup function; run on exit"
2139
service.cleanup()
2140
2141
multiprocessing.active_children()
3362
if zeroconf:
3363
service.cleanup()
3364
3365
mp.active_children()
3366
wn.close()
3367
if not (tcp_server.clients or client_settings):
3368
return
3369
3370
# Store client before exiting. Secrets are encrypted with key
3371
# based on what config file has. If config file is
3372
# removed/edited, old secret will thus be unrecovable.
3373
clients = {}
3374
with PGPEngine() as pgp:
3375
for client in tcp_server.clients.values():
3376
key = client_settings[client.name]["secret"]
3377
client.encrypted_secret = pgp.encrypt(client.secret,
3378
key)
3379
client_dict = {}
3380
3381
# A list of attributes that can not be pickled
3382
# + secret.
3383
exclude = {"bus", "changedstate", "secret",
3384
"checker", "server_settings"}
3385
for name, typ in inspect.getmembers(dbus.service
3386
.Object):
3387
exclude.add(name)
3388
3389
client_dict["encrypted_secret"] = (client
3390
.encrypted_secret)
3391
for attr in client.client_structure:
3392
if attr not in exclude:
3393
client_dict[attr] = getattr(client, attr)
3394
3395
clients[client.name] = client_dict
3396
del client_settings[client.name]["secret"]
3397
3398
try:
3399
with tempfile.NamedTemporaryFile(
3400
mode='wb',
3401
suffix=".pickle",
3402
prefix='clients-',
3403
dir=os.path.dirname(stored_state_path),
3404
delete=False) as stored_state:
3405
pickle.dump((clients, client_settings), stored_state,
3406
protocol=2)
3407
tempname = stored_state.name
3408
os.rename(tempname, stored_state_path)
3409
except (IOError, OSError) as e:
3410
if not debug:
3411
try:
3412
os.remove(tempname)
3413
except NameError:
3414
pass
3415
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
3416
logger.warning("Could not save persistent state: {}"
3417
.format(os.strerror(e.errno)))
3418
else:
3419
logger.warning("Could not save persistent state:",
3420
exc_info=e)
3421
raise
3422
3423
# Delete all clients, and settings from config
2142
3424
while tcp_server.clients:
2143
client = tcp_server.clients.pop()
3425
name, client = tcp_server.clients.popitem()
2144
3426
if use_dbus:
2145
3427
client.remove_from_connection()
2146
client.disable_hook = None
2147
# Don't signal anything except ClientRemoved
3428
# Don't signal the disabling
2148
3429
client.disable(quiet=True)
3430
# Emit D-Bus signal for removal
2149
3431
if use_dbus:
2150
# Emit D-Bus signal
2151
mandos_dbus_service.ClientRemoved(client
2152
.dbus_object_path,
2153
client.name)
2154
3432
mandos_dbus_service.client_removed_signal(client)
3433
client_settings.clear()
3434
2155
3435
atexit.register(cleanup)
2156
2157
for client in tcp_server.clients:
3436
3437
for client in tcp_server.clients.values():
2158
3438
if use_dbus:
2159
# Emit D-Bus signal
2160
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2161
client.enable()
2162
3439
# Emit D-Bus signal for adding
3440
mandos_dbus_service.client_added_signal(client)
3441
# Need to initiate checking of clients
3442
if client.enabled:
3443
client.init_checker()
3444
2163
3445
tcp_server.enable()
2164
3446
tcp_server.server_activate()
2165
3447
2166
3448
# Find out what port we got
2167
service.port = tcp_server.socket.getsockname()[1]
3449
if zeroconf:
3450
service.port = tcp_server.socket.getsockname()[1]
2168
3451
if use_ipv6:
2169
3452
logger.info("Now listening on address %r, port %d,"
2170
" flowinfo %d, scope_id %d"
2171
% tcp_server.socket.getsockname())
3453
" flowinfo %d, scope_id %d",
3454
*tcp_server.socket.getsockname())
2172
3455
else: # IPv4
2173
logger.info("Now listening on address %r, port %d"
2174
% tcp_server.socket.getsockname())
2175
2176
#service.interface = tcp_server.socket.getsockname()[3]
2177
3456
logger.info("Now listening on address %r, port %d",
3457
*tcp_server.socket.getsockname())
3458
3459
# service.interface = tcp_server.socket.getsockname()[3]
3460
2178
3461
try:
2179
# From the Avahi example code
2180
try:
2181
service.activate()
2182
except dbus.exceptions.DBusException as error:
2183
logger.critical("DBusException: %s", error)
2184
cleanup()
2185
sys.exit(1)
2186
# End of Avahi example code
2187
2188
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2189
lambda *args, **kwargs:
2190
(tcp_server.handle_request
2191
(*args[2:], **kwargs) or True))
2192
3462
if zeroconf:
3463
# From the Avahi example code
3464
try:
3465
service.activate()
3466
except dbus.exceptions.DBusException as error:
3467
logger.critical("D-Bus Exception", exc_info=error)
3468
cleanup()
3469
sys.exit(1)
3470
# End of Avahi example code
3471
3472
GLib.io_add_watch(tcp_server.fileno(), GLib.IO_IN,
3473
lambda *args, **kwargs:
3474
(tcp_server.handle_request
3475
(*args[2:], **kwargs) or True))
3476
2193
3477
logger.debug("Starting main loop")
2194
3478
main_loop.run()
2195
3479
except AvahiError as error:
2196
logger.critical("AvahiError: %s", error)
3480
logger.critical("Avahi Error", exc_info=error)
2197
3481
cleanup()
2198
3482
sys.exit(1)
2199
3483
except KeyboardInterrupt:
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0