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- Committer: Teddy Hogeborn
- Date: 2016-10-08 04:33:04 UTC
- mto: This revision was merged to the branch mainline in revision 881.
- Revision ID: teddy@recompile.se-20161008043304-u4wqp55iacqfbwhb
Tags: version-1.7.13-1
* Makefile (version): Change to 1.7.13.
* NEWS (Version 1.7.13): Add new entry.
* debian/changelog (1.7.13-1): - '' -
* NEWS (Version 1.7.13): Add new entry.
* debian/changelog (1.7.13-1): - '' -
- files added:
- bugs.xml
- debian/upstream
- network-hooks.d
- plugin-helpers
- files modified:
- .bzrignore
added
removed
mandos
1
1
#!/usr/bin/python
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2
# -*- mode: python; coding: utf-8 -*-
3
#
3
#
4
4
# Mandos server - give out binary blobs to connecting clients.
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#
5
#
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# This program is partly derived from an example program for an Avahi
7
7
# service publisher, downloaded from
8
8
# <http://avahi.org/wiki/PythonPublishExample>. This includes the
9
9
# methods "add", "remove", "server_state_changed",
10
10
# "entry_group_state_changed", "cleanup", and "activate" in the
11
11
# "AvahiService" class, and some lines in "main".
12
#
12
#
13
13
# Everything else is
14
# Copyright © 2008-2011 Teddy Hogeborn
15
# Copyright © 2008-2011 Björn Påhlsson
16
#
14
# Copyright © 2008-2016 Teddy Hogeborn
15
# Copyright © 2008-2016 Björn Påhlsson
16
#
17
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# This program is free software: you can redistribute it and/or modify
18
18
# it under the terms of the GNU General Public License as published by
19
19
# the Free Software Foundation, either version 3 of the License, or
23
23
# but WITHOUT ANY WARRANTY; without even the implied warranty of
24
24
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
25
25
# GNU General Public License for more details.
26
#
26
#
27
27
# You should have received a copy of the GNU General Public License
28
28
# along with this program. If not, see
29
29
# <http://www.gnu.org/licenses/>.
30
#
31
# Contact the authors at <mandos@fukt.bsnet.se>.
32
#
30
#
31
# Contact the authors at <mandos@recompile.se>.
32
#
33
33
34
34
from __future__ import (division, absolute_import, print_function,
35
35
unicode_literals)
36
36
37
import SocketServer as socketserver
37
try:
38
from future_builtins import *
39
except ImportError:
40
pass
41
42
try:
43
import SocketServer as socketserver
44
except ImportError:
45
import socketserver
38
46
import socket
39
47
import argparse
40
48
import datetime
41
49
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
50
try:
51
import ConfigParser as configparser
52
except ImportError:
53
import configparser
49
54
import sys
50
55
import re
51
56
import os
60
65
import struct
61
66
import fcntl
62
67
import functools
63
import cPickle as pickle
68
try:
69
import cPickle as pickle
70
except ImportError:
71
import pickle
64
72
import multiprocessing
73
import types
74
import binascii
75
import tempfile
76
import itertools
77
import collections
78
import codecs
65
79
66
80
import dbus
67
81
import dbus.service
68
import gobject
69
import avahi
82
from gi.repository import GLib
70
83
from dbus.mainloop.glib import DBusGMainLoop
71
84
import ctypes
72
85
import ctypes.util
73
86
import xml.dom.minidom
74
87
import inspect
75
88
89
# Try to find the value of SO_BINDTODEVICE:
76
90
try:
91
# This is where SO_BINDTODEVICE is in Python 3.3 (or 3.4?) and
92
# newer, and it is also the most natural place for it:
77
93
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
78
94
except AttributeError:
79
95
try:
96
# This is where SO_BINDTODEVICE was up to and including Python
97
# 2.6, and also 3.2:
80
98
from IN import SO_BINDTODEVICE
81
99
except ImportError:
82
SO_BINDTODEVICE = None
83
84
85
version = "1.3.1"
86
87
#logger = logging.getLogger('mandos')
88
logger = logging.Logger('mandos')
89
syslogger = (logging.handlers.SysLogHandler
90
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
91
address = str("/dev/log")))
92
syslogger.setFormatter(logging.Formatter
93
('Mandos [%(process)d]: %(levelname)s:'
94
' %(message)s'))
95
logger.addHandler(syslogger)
96
97
console = logging.StreamHandler()
98
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
99
' %(levelname)s:'
100
' %(message)s'))
101
logger.addHandler(console)
100
# In Python 2.7 it seems to have been removed entirely.
101
# Try running the C preprocessor:
102
try:
103
cc = subprocess.Popen(["cc", "--language=c", "-E",
104
"/dev/stdin"],
105
stdin=subprocess.PIPE,
106
stdout=subprocess.PIPE)
107
stdout = cc.communicate(
108
"#include <sys/socket.h>\nSO_BINDTODEVICE\n")[0]
109
SO_BINDTODEVICE = int(stdout.splitlines()[-1])
110
except (OSError, ValueError, IndexError):
111
# No value found
112
SO_BINDTODEVICE = None
113
114
if sys.version_info.major == 2:
115
str = unicode
116
117
version = "1.7.13"
118
stored_state_file = "clients.pickle"
119
120
logger = logging.getLogger()
121
syslogger = None
122
123
try:
124
if_nametoindex = ctypes.cdll.LoadLibrary(
125
ctypes.util.find_library("c")).if_nametoindex
126
except (OSError, AttributeError):
127
128
def if_nametoindex(interface):
129
"Get an interface index the hard way, i.e. using fcntl()"
130
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
131
with contextlib.closing(socket.socket()) as s:
132
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
133
struct.pack(b"16s16x", interface))
134
interface_index = struct.unpack("I", ifreq[16:20])[0]
135
return interface_index
136
137
138
def copy_function(func):
139
"""Make a copy of a function"""
140
if sys.version_info.major == 2:
141
return types.FunctionType(func.func_code,
142
func.func_globals,
143
func.func_name,
144
func.func_defaults,
145
func.func_closure)
146
else:
147
return types.FunctionType(func.__code__,
148
func.__globals__,
149
func.__name__,
150
func.__defaults__,
151
func.__closure__)
152
153
154
def initlogger(debug, level=logging.WARNING):
155
"""init logger and add loglevel"""
156
157
global syslogger
158
syslogger = (logging.handlers.SysLogHandler(
159
facility=logging.handlers.SysLogHandler.LOG_DAEMON,
160
address="/dev/log"))
161
syslogger.setFormatter(logging.Formatter
162
('Mandos [%(process)d]: %(levelname)s:'
163
' %(message)s'))
164
logger.addHandler(syslogger)
165
166
if debug:
167
console = logging.StreamHandler()
168
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
169
' [%(process)d]:'
170
' %(levelname)s:'
171
' %(message)s'))
172
logger.addHandler(console)
173
logger.setLevel(level)
174
175
176
class PGPError(Exception):
177
"""Exception if encryption/decryption fails"""
178
pass
179
180
181
class PGPEngine(object):
182
"""A simple class for OpenPGP symmetric encryption & decryption"""
183
184
def __init__(self):
185
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
186
self.gpg = "gpg"
187
try:
188
output = subprocess.check_output(["gpgconf"])
189
for line in output.splitlines():
190
name, text, path = line.split(b":")
191
if name == "gpg":
192
self.gpg = path
193
break
194
except OSError as e:
195
if e.errno != errno.ENOENT:
196
raise
197
self.gnupgargs = ['--batch',
198
'--homedir', self.tempdir,
199
'--force-mdc',
200
'--quiet']
201
# Only GPG version 1 has the --no-use-agent option.
202
if self.gpg == "gpg" or self.gpg.endswith("/gpg"):
203
self.gnupgargs.append("--no-use-agent")
204
205
def __enter__(self):
206
return self
207
208
def __exit__(self, exc_type, exc_value, traceback):
209
self._cleanup()
210
return False
211
212
def __del__(self):
213
self._cleanup()
214
215
def _cleanup(self):
216
if self.tempdir is not None:
217
# Delete contents of tempdir
218
for root, dirs, files in os.walk(self.tempdir,
219
topdown=False):
220
for filename in files:
221
os.remove(os.path.join(root, filename))
222
for dirname in dirs:
223
os.rmdir(os.path.join(root, dirname))
224
# Remove tempdir
225
os.rmdir(self.tempdir)
226
self.tempdir = None
227
228
def password_encode(self, password):
229
# Passphrase can not be empty and can not contain newlines or
230
# NUL bytes. So we prefix it and hex encode it.
231
encoded = b"mandos" + binascii.hexlify(password)
232
if len(encoded) > 2048:
233
# GnuPG can't handle long passwords, so encode differently
234
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
235
.replace(b"\n", b"\\n")
236
.replace(b"\0", b"\\x00"))
237
return encoded
238
239
def encrypt(self, data, password):
240
passphrase = self.password_encode(password)
241
with tempfile.NamedTemporaryFile(
242
dir=self.tempdir) as passfile:
243
passfile.write(passphrase)
244
passfile.flush()
245
proc = subprocess.Popen([self.gpg, '--symmetric',
246
'--passphrase-file',
247
passfile.name]
248
+ self.gnupgargs,
249
stdin=subprocess.PIPE,
250
stdout=subprocess.PIPE,
251
stderr=subprocess.PIPE)
252
ciphertext, err = proc.communicate(input=data)
253
if proc.returncode != 0:
254
raise PGPError(err)
255
return ciphertext
256
257
def decrypt(self, data, password):
258
passphrase = self.password_encode(password)
259
with tempfile.NamedTemporaryFile(
260
dir=self.tempdir) as passfile:
261
passfile.write(passphrase)
262
passfile.flush()
263
proc = subprocess.Popen([self.gpg, '--decrypt',
264
'--passphrase-file',
265
passfile.name]
266
+ self.gnupgargs,
267
stdin=subprocess.PIPE,
268
stdout=subprocess.PIPE,
269
stderr=subprocess.PIPE)
270
decrypted_plaintext, err = proc.communicate(input=data)
271
if proc.returncode != 0:
272
raise PGPError(err)
273
return decrypted_plaintext
274
275
276
# Pretend that we have an Avahi module
277
class Avahi(object):
278
"""This isn't so much a class as it is a module-like namespace.
279
It is instantiated once, and simulates having an Avahi module."""
280
IF_UNSPEC = -1 # avahi-common/address.h
281
PROTO_UNSPEC = -1 # avahi-common/address.h
282
PROTO_INET = 0 # avahi-common/address.h
283
PROTO_INET6 = 1 # avahi-common/address.h
284
DBUS_NAME = "org.freedesktop.Avahi"
285
DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"
286
DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"
287
DBUS_PATH_SERVER = "/"
288
289
def string_array_to_txt_array(self, t):
290
return dbus.Array((dbus.ByteArray(s.encode("utf-8"))
291
for s in t), signature="ay")
292
ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h
293
ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h
294
ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h
295
SERVER_INVALID = 0 # avahi-common/defs.h
296
SERVER_REGISTERING = 1 # avahi-common/defs.h
297
SERVER_RUNNING = 2 # avahi-common/defs.h
298
SERVER_COLLISION = 3 # avahi-common/defs.h
299
SERVER_FAILURE = 4 # avahi-common/defs.h
300
avahi = Avahi()
301
102
302
103
303
class AvahiError(Exception):
104
304
def __init__(self, value, *args, **kwargs):
105
305
self.value = value
106
super(AvahiError, self).__init__(value, *args, **kwargs)
107
def __unicode__(self):
108
return unicode(repr(self.value))
306
return super(AvahiError, self).__init__(value, *args,
307
**kwargs)
308
109
309
110
310
class AvahiServiceError(AvahiError):
111
311
pass
112
312
313
113
314
class AvahiGroupError(AvahiError):
114
315
pass
115
316
116
317
117
318
class AvahiService(object):
118
319
"""An Avahi (Zeroconf) service.
119
320
120
321
Attributes:
121
322
interface: integer; avahi.IF_UNSPEC or an interface index.
122
323
Used to optionally bind to the specified interface.
123
324
name: string; Example: 'Mandos'
124
325
type: string; Example: '_mandos._tcp'.
125
See <http://www.dns-sd.org/ServiceTypes.html>
326
See <https://www.iana.org/assignments/service-names-port-numbers>
126
327
port: integer; what port to announce
127
328
TXT: list of strings; TXT record for the service
128
329
domain: string; Domain to publish on, default to .local if empty.
134
335
server: D-Bus Server
135
336
bus: dbus.SystemBus()
136
337
"""
137
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
138
servicetype = None, port = None, TXT = None,
139
domain = "", host = "", max_renames = 32768,
140
protocol = avahi.PROTO_UNSPEC, bus = None):
338
339
def __init__(self,
340
interface=avahi.IF_UNSPEC,
341
name=None,
342
servicetype=None,
343
port=None,
344
TXT=None,
345
domain="",
346
host="",
347
max_renames=32768,
348
protocol=avahi.PROTO_UNSPEC,
349
bus=None):
141
350
self.interface = interface
142
351
self.name = name
143
352
self.type = servicetype
152
361
self.server = None
153
362
self.bus = bus
154
363
self.entry_group_state_changed_match = None
155
def rename(self):
364
365
def rename(self, remove=True):
156
366
"""Derived from the Avahi example code"""
157
367
if self.rename_count >= self.max_renames:
158
368
logger.critical("No suitable Zeroconf service name found"
159
369
" after %i retries, exiting.",
160
370
self.rename_count)
161
371
raise AvahiServiceError("Too many renames")
162
self.name = unicode(self.server.GetAlternativeServiceName(self.name))
372
self.name = str(
373
self.server.GetAlternativeServiceName(self.name))
374
self.rename_count += 1
163
375
logger.info("Changing Zeroconf service name to %r ...",
164
376
self.name)
165
syslogger.setFormatter(logging.Formatter
166
('Mandos (%s) [%%(process)d]:'
167
' %%(levelname)s: %%(message)s'
168
% self.name))
169
self.remove()
377
if remove:
378
self.remove()
170
379
try:
171
380
self.add()
172
381
except dbus.exceptions.DBusException as error:
173
logger.critical("DBusException: %s", error)
174
self.cleanup()
175
os._exit(1)
176
self.rename_count += 1
382
if (error.get_dbus_name()
383
== "org.freedesktop.Avahi.CollisionError"):
384
logger.info("Local Zeroconf service name collision.")
385
return self.rename(remove=False)
386
else:
387
logger.critical("D-Bus Exception", exc_info=error)
388
self.cleanup()
389
os._exit(1)
390
177
391
def remove(self):
178
392
"""Derived from the Avahi example code"""
179
393
if self.entry_group_state_changed_match is not None:
181
395
self.entry_group_state_changed_match = None
182
396
if self.group is not None:
183
397
self.group.Reset()
398
184
399
def add(self):
185
400
"""Derived from the Avahi example code"""
186
401
self.remove()
191
406
avahi.DBUS_INTERFACE_ENTRY_GROUP)
192
407
self.entry_group_state_changed_match = (
193
408
self.group.connect_to_signal(
194
'StateChanged', self .entry_group_state_changed))
409
'StateChanged', self.entry_group_state_changed))
195
410
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
196
411
self.name, self.type)
197
412
self.group.AddService(
203
418
dbus.UInt16(self.port),
204
419
avahi.string_array_to_txt_array(self.TXT))
205
420
self.group.Commit()
421
206
422
def entry_group_state_changed(self, state, error):
207
423
"""Derived from the Avahi example code"""
208
424
logger.debug("Avahi entry group state change: %i", state)
209
425
210
426
if state == avahi.ENTRY_GROUP_ESTABLISHED:
211
427
logger.debug("Zeroconf service established.")
212
428
elif state == avahi.ENTRY_GROUP_COLLISION:
214
430
self.rename()
215
431
elif state == avahi.ENTRY_GROUP_FAILURE:
216
432
logger.critical("Avahi: Error in group state changed %s",
217
unicode(error))
218
raise AvahiGroupError("State changed: %s"
219
% unicode(error))
433
str(error))
434
raise AvahiGroupError("State changed: {!s}".format(error))
435
220
436
def cleanup(self):
221
437
"""Derived from the Avahi example code"""
222
438
if self.group is not None:
223
439
try:
224
440
self.group.Free()
225
441
except (dbus.exceptions.UnknownMethodException,
226
dbus.exceptions.DBusException) as e:
442
dbus.exceptions.DBusException):
227
443
pass
228
444
self.group = None
229
445
self.remove()
446
230
447
def server_state_changed(self, state, error=None):
231
448
"""Derived from the Avahi example code"""
232
449
logger.debug("Avahi server state change: %i", state)
233
bad_states = { avahi.SERVER_INVALID:
234
"Zeroconf server invalid",
235
avahi.SERVER_REGISTERING: None,
236
avahi.SERVER_COLLISION:
237
"Zeroconf server name collision",
238
avahi.SERVER_FAILURE:
239
"Zeroconf server failure" }
450
bad_states = {
451
avahi.SERVER_INVALID: "Zeroconf server invalid",
452
avahi.SERVER_REGISTERING: None,
453
avahi.SERVER_COLLISION: "Zeroconf server name collision",
454
avahi.SERVER_FAILURE: "Zeroconf server failure",
455
}
240
456
if state in bad_states:
241
457
if bad_states[state] is not None:
242
458
if error is None:
245
461
logger.error(bad_states[state] + ": %r", error)
246
462
self.cleanup()
247
463
elif state == avahi.SERVER_RUNNING:
248
self.add()
464
try:
465
self.add()
466
except dbus.exceptions.DBusException as error:
467
if (error.get_dbus_name()
468
== "org.freedesktop.Avahi.CollisionError"):
469
logger.info("Local Zeroconf service name"
470
" collision.")
471
return self.rename(remove=False)
472
else:
473
logger.critical("D-Bus Exception", exc_info=error)
474
self.cleanup()
475
os._exit(1)
249
476
else:
250
477
if error is None:
251
478
logger.debug("Unknown state: %r", state)
252
479
else:
253
480
logger.debug("Unknown state: %r: %r", state, error)
481
254
482
def activate(self):
255
483
"""Derived from the Avahi example code"""
256
484
if self.server is None:
260
488
follow_name_owner_changes=True),
261
489
avahi.DBUS_INTERFACE_SERVER)
262
490
self.server.connect_to_signal("StateChanged",
263
self.server_state_changed)
491
self.server_state_changed)
264
492
self.server_state_changed(self.server.GetState())
265
493
266
494
495
class AvahiServiceToSyslog(AvahiService):
496
def rename(self, *args, **kwargs):
497
"""Add the new name to the syslog messages"""
498
ret = AvahiService.rename(self, *args, **kwargs)
499
syslogger.setFormatter(logging.Formatter(
500
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
501
.format(self.name)))
502
return ret
503
504
505
# Pretend that we have a GnuTLS module
506
class GnuTLS(object):
507
"""This isn't so much a class as it is a module-like namespace.
508
It is instantiated once, and simulates having a GnuTLS module."""
509
510
library = ctypes.util.find_library("gnutls")
511
if library is None:
512
library = ctypes.util.find_library("gnutls-deb0")
513
_library = ctypes.cdll.LoadLibrary(library)
514
del library
515
_need_version = b"3.3.0"
516
517
def __init__(self):
518
# Need to use class name "GnuTLS" here, since this method is
519
# called before the assignment to the "gnutls" global variable
520
# happens.
521
if GnuTLS.check_version(self._need_version) is None:
522
raise GnuTLS.Error("Needs GnuTLS {} or later"
523
.format(self._need_version))
524
525
# Unless otherwise indicated, the constants and types below are
526
# all from the gnutls/gnutls.h C header file.
527
528
# Constants
529
E_SUCCESS = 0
530
E_INTERRUPTED = -52
531
E_AGAIN = -28
532
CRT_OPENPGP = 2
533
CLIENT = 2
534
SHUT_RDWR = 0
535
CRD_CERTIFICATE = 1
536
E_NO_CERTIFICATE_FOUND = -49
537
OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
538
539
# Types
540
class session_int(ctypes.Structure):
541
_fields_ = []
542
session_t = ctypes.POINTER(session_int)
543
544
class certificate_credentials_st(ctypes.Structure):
545
_fields_ = []
546
certificate_credentials_t = ctypes.POINTER(
547
certificate_credentials_st)
548
certificate_type_t = ctypes.c_int
549
550
class datum_t(ctypes.Structure):
551
_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
552
('size', ctypes.c_uint)]
553
554
class openpgp_crt_int(ctypes.Structure):
555
_fields_ = []
556
openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
557
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
558
log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
559
credentials_type_t = ctypes.c_int
560
transport_ptr_t = ctypes.c_void_p
561
close_request_t = ctypes.c_int
562
563
# Exceptions
564
class Error(Exception):
565
# We need to use the class name "GnuTLS" here, since this
566
# exception might be raised from within GnuTLS.__init__,
567
# which is called before the assignment to the "gnutls"
568
# global variable has happened.
569
def __init__(self, message=None, code=None, args=()):
570
# Default usage is by a message string, but if a return
571
# code is passed, convert it to a string with
572
# gnutls.strerror()
573
self.code = code
574
if message is None and code is not None:
575
message = GnuTLS.strerror(code)
576
return super(GnuTLS.Error, self).__init__(
577
message, *args)
578
579
class CertificateSecurityError(Error):
580
pass
581
582
# Classes
583
class Credentials(object):
584
def __init__(self):
585
self._c_object = gnutls.certificate_credentials_t()
586
gnutls.certificate_allocate_credentials(
587
ctypes.byref(self._c_object))
588
self.type = gnutls.CRD_CERTIFICATE
589
590
def __del__(self):
591
gnutls.certificate_free_credentials(self._c_object)
592
593
class ClientSession(object):
594
def __init__(self, socket, credentials=None):
595
self._c_object = gnutls.session_t()
596
gnutls.init(ctypes.byref(self._c_object), gnutls.CLIENT)
597
gnutls.set_default_priority(self._c_object)
598
gnutls.transport_set_ptr(self._c_object, socket.fileno())
599
gnutls.handshake_set_private_extensions(self._c_object,
600
True)
601
self.socket = socket
602
if credentials is None:
603
credentials = gnutls.Credentials()
604
gnutls.credentials_set(self._c_object, credentials.type,
605
ctypes.cast(credentials._c_object,
606
ctypes.c_void_p))
607
self.credentials = credentials
608
609
def __del__(self):
610
gnutls.deinit(self._c_object)
611
612
def handshake(self):
613
return gnutls.handshake(self._c_object)
614
615
def send(self, data):
616
data = bytes(data)
617
data_len = len(data)
618
while data_len > 0:
619
data_len -= gnutls.record_send(self._c_object,
620
data[-data_len:],
621
data_len)
622
623
def bye(self):
624
return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
625
626
# Error handling functions
627
def _error_code(result):
628
"""A function to raise exceptions on errors, suitable
629
for the 'restype' attribute on ctypes functions"""
630
if result >= 0:
631
return result
632
if result == gnutls.E_NO_CERTIFICATE_FOUND:
633
raise gnutls.CertificateSecurityError(code=result)
634
raise gnutls.Error(code=result)
635
636
def _retry_on_error(result, func, arguments):
637
"""A function to retry on some errors, suitable
638
for the 'errcheck' attribute on ctypes functions"""
639
while result < 0:
640
if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
641
return _error_code(result)
642
result = func(*arguments)
643
return result
644
645
# Unless otherwise indicated, the function declarations below are
646
# all from the gnutls/gnutls.h C header file.
647
648
# Functions
649
priority_set_direct = _library.gnutls_priority_set_direct
650
priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
651
ctypes.POINTER(ctypes.c_char_p)]
652
priority_set_direct.restype = _error_code
653
654
init = _library.gnutls_init
655
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
656
init.restype = _error_code
657
658
set_default_priority = _library.gnutls_set_default_priority
659
set_default_priority.argtypes = [session_t]
660
set_default_priority.restype = _error_code
661
662
record_send = _library.gnutls_record_send
663
record_send.argtypes = [session_t, ctypes.c_void_p,
664
ctypes.c_size_t]
665
record_send.restype = ctypes.c_ssize_t
666
record_send.errcheck = _retry_on_error
667
668
certificate_allocate_credentials = (
669
_library.gnutls_certificate_allocate_credentials)
670
certificate_allocate_credentials.argtypes = [
671
ctypes.POINTER(certificate_credentials_t)]
672
certificate_allocate_credentials.restype = _error_code
673
674
certificate_free_credentials = (
675
_library.gnutls_certificate_free_credentials)
676
certificate_free_credentials.argtypes = [
677
certificate_credentials_t]
678
certificate_free_credentials.restype = None
679
680
handshake_set_private_extensions = (
681
_library.gnutls_handshake_set_private_extensions)
682
handshake_set_private_extensions.argtypes = [session_t,
683
ctypes.c_int]
684
handshake_set_private_extensions.restype = None
685
686
credentials_set = _library.gnutls_credentials_set
687
credentials_set.argtypes = [session_t, credentials_type_t,
688
ctypes.c_void_p]
689
credentials_set.restype = _error_code
690
691
strerror = _library.gnutls_strerror
692
strerror.argtypes = [ctypes.c_int]
693
strerror.restype = ctypes.c_char_p
694
695
certificate_type_get = _library.gnutls_certificate_type_get
696
certificate_type_get.argtypes = [session_t]
697
certificate_type_get.restype = _error_code
698
699
certificate_get_peers = _library.gnutls_certificate_get_peers
700
certificate_get_peers.argtypes = [session_t,
701
ctypes.POINTER(ctypes.c_uint)]
702
certificate_get_peers.restype = ctypes.POINTER(datum_t)
703
704
global_set_log_level = _library.gnutls_global_set_log_level
705
global_set_log_level.argtypes = [ctypes.c_int]
706
global_set_log_level.restype = None
707
708
global_set_log_function = _library.gnutls_global_set_log_function
709
global_set_log_function.argtypes = [log_func]
710
global_set_log_function.restype = None
711
712
deinit = _library.gnutls_deinit
713
deinit.argtypes = [session_t]
714
deinit.restype = None
715
716
handshake = _library.gnutls_handshake
717
handshake.argtypes = [session_t]
718
handshake.restype = _error_code
719
handshake.errcheck = _retry_on_error
720
721
transport_set_ptr = _library.gnutls_transport_set_ptr
722
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
723
transport_set_ptr.restype = None
724
725
bye = _library.gnutls_bye
726
bye.argtypes = [session_t, close_request_t]
727
bye.restype = _error_code
728
bye.errcheck = _retry_on_error
729
730
check_version = _library.gnutls_check_version
731
check_version.argtypes = [ctypes.c_char_p]
732
check_version.restype = ctypes.c_char_p
733
734
# All the function declarations below are from gnutls/openpgp.h
735
736
openpgp_crt_init = _library.gnutls_openpgp_crt_init
737
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
738
openpgp_crt_init.restype = _error_code
739
740
openpgp_crt_import = _library.gnutls_openpgp_crt_import
741
openpgp_crt_import.argtypes = [openpgp_crt_t,
742
ctypes.POINTER(datum_t),
743
openpgp_crt_fmt_t]
744
openpgp_crt_import.restype = _error_code
745
746
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
747
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
748
ctypes.POINTER(ctypes.c_uint)]
749
openpgp_crt_verify_self.restype = _error_code
750
751
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
752
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
753
openpgp_crt_deinit.restype = None
754
755
openpgp_crt_get_fingerprint = (
756
_library.gnutls_openpgp_crt_get_fingerprint)
757
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
758
ctypes.c_void_p,
759
ctypes.POINTER(
760
ctypes.c_size_t)]
761
openpgp_crt_get_fingerprint.restype = _error_code
762
763
# Remove non-public functions
764
del _error_code, _retry_on_error
765
# Create the global "gnutls" object, simulating a module
766
gnutls = GnuTLS()
767
768
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
267
780
class Client(object):
268
781
"""A representation of a client host served by this server.
269
782
270
783
Attributes:
271
_approved: bool(); 'None' if not yet approved/disapproved
784
approved: bool(); 'None' if not yet approved/disapproved
272
785
approval_delay: datetime.timedelta(); Time to wait for approval
273
786
approval_duration: datetime.timedelta(); Duration of one approval
274
787
checker: subprocess.Popen(); a running checker process used
275
788
to see if the client lives.
276
789
'None' if no process is running.
277
checker_callback_tag: a gobject event source tag, or None
790
checker_callback_tag: a GLib event source tag, or None
278
791
checker_command: string; External command which is run to check
279
792
if client lives. %() expansions are done at
280
793
runtime with vars(self) as dict, so that for
281
794
instance %(name)s can be used in the command.
282
checker_initiator_tag: a gobject event source tag, or None
795
checker_initiator_tag: a GLib event source tag, or None
283
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
284
799
current_checker_command: string; current running checker_command
285
disable_hook: If set, called by disable() as disable_hook(self)
286
disable_initiator_tag: a gobject event source tag, or None
800
disable_initiator_tag: a GLib event source tag, or None
287
801
enabled: bool()
288
802
fingerprint: string (40 or 32 hexadecimal digits); used to
289
803
uniquely identify the client
291
805
interval: datetime.timedelta(); How often to start a new checker
292
806
last_approval_request: datetime.datetime(); (UTC) or None
293
807
last_checked_ok: datetime.datetime(); (UTC) or None
294
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
295
814
name: string; from the config file, used in log messages and
296
815
D-Bus identifiers
297
816
secret: bytestring; sent verbatim (over TLS) to client
298
817
timeout: datetime.timedelta(); How long from last_checked_ok
299
818
until this client is disabled
300
extended_timeout: extra long timeout when password has been sent
819
extended_timeout: extra long timeout when secret has been sent
301
820
runtime_expansions: Allowed attributes for runtime expansion.
302
821
expires: datetime.datetime(); time (UTC) when a client will be
303
822
disabled, or None
823
server_settings: The server_settings dict from main()
304
824
"""
305
825
306
826
runtime_expansions = ("approval_delay", "approval_duration",
307
"created", "enabled", "fingerprint",
308
"host", "interval", "last_checked_ok",
827
"created", "enabled", "expires",
828
"fingerprint", "host", "interval",
829
"last_approval_request", "last_checked_ok",
309
830
"last_enabled", "name", "timeout")
310
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
311
843
@staticmethod
312
def _timedelta_to_milliseconds(td):
313
"Convert a datetime.timedelta() to milliseconds"
314
return ((td.days * 24 * 60 * 60 * 1000)
315
+ (td.seconds * 1000)
316
+ (td.microseconds // 1000))
317
318
def timeout_milliseconds(self):
319
"Return the 'timeout' attribute in milliseconds"
320
return self._timedelta_to_milliseconds(self.timeout)
321
322
def extended_timeout_milliseconds(self):
323
"Return the 'extended_timeout' attribute in milliseconds"
324
return self._timedelta_to_milliseconds(self.extended_timeout)
325
326
def interval_milliseconds(self):
327
"Return the 'interval' attribute in milliseconds"
328
return self._timedelta_to_milliseconds(self.interval)
329
330
def approval_delay_milliseconds(self):
331
return self._timedelta_to_milliseconds(self.approval_delay)
332
333
def __init__(self, name = None, disable_hook=None, config=None):
334
"""Note: the 'checker' key in 'config' sets the
335
'checker_command' attribute and *not* the 'checker'
336
attribute."""
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):
337
896
self.name = name
338
if config is None:
339
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
340
914
logger.debug("Creating client %r", self.name)
341
# Uppercase and remove spaces from fingerprint for later
342
# comparison purposes with return value from the fingerprint()
343
# function
344
self.fingerprint = (config["fingerprint"].upper()
345
.replace(" ", ""))
346
915
logger.debug(" Fingerprint: %s", self.fingerprint)
347
if "secret" in config:
348
self.secret = config["secret"].decode("base64")
349
elif "secfile" in config:
350
with open(os.path.expanduser(os.path.expandvars
351
(config["secfile"])),
352
"rb") as secfile:
353
self.secret = secfile.read()
354
else:
355
raise TypeError("No secret or secfile for client %s"
356
% self.name)
357
self.host = config.get("host", "")
358
self.created = datetime.datetime.utcnow()
359
self.enabled = False
360
self.last_approval_request = None
361
self.last_enabled = None
362
self.last_checked_ok = None
363
self.timeout = string_to_delta(config["timeout"])
364
self.extended_timeout = string_to_delta(config["extended_timeout"])
365
self.interval = string_to_delta(config["interval"])
366
self.disable_hook = disable_hook
916
self.created = settings.get("created",
917
datetime.datetime.utcnow())
918
919
# attributes specific for this server instance
367
920
self.checker = None
368
921
self.checker_initiator_tag = None
369
922
self.disable_initiator_tag = None
370
self.expires = None
371
923
self.checker_callback_tag = None
372
self.checker_command = config["checker"]
373
924
self.current_checker_command = None
374
self.last_connect = None
375
self._approved = None
376
self.approved_by_default = config.get("approved_by_default",
377
True)
925
self.approved = None
378
926
self.approvals_pending = 0
379
self.approval_delay = string_to_delta(
380
config["approval_delay"])
381
self.approval_duration = string_to_delta(
382
config["approval_duration"])
383
self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())
384
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
385
940
def send_changedstate(self):
386
self.changedstate.acquire()
387
self.changedstate.notify_all()
388
self.changedstate.release()
389
941
with self.changedstate:
942
self.changedstate.notify_all()
943
390
944
def enable(self):
391
945
"""Start this client's checker and timeout hooks"""
392
946
if getattr(self, "enabled", False):
393
947
# Already enabled
394
948
return
395
self.send_changedstate()
949
self.expires = datetime.datetime.utcnow() + self.timeout
950
self.enabled = True
396
951
self.last_enabled = datetime.datetime.utcnow()
397
# Schedule a new checker to be started an 'interval' from now,
398
# and every interval from then on.
399
self.checker_initiator_tag = (gobject.timeout_add
400
(self.interval_milliseconds(),
401
self.start_checker))
402
# Schedule a disable() when 'timeout' has passed
403
self.expires = datetime.datetime.utcnow() + self.timeout
404
self.disable_initiator_tag = (gobject.timeout_add
405
(self.timeout_milliseconds(),
406
self.disable))
407
self.enabled = True
408
# Also start a new checker *right now*.
409
self.start_checker()
410
952
self.init_checker()
953
self.send_changedstate()
954
411
955
def disable(self, quiet=True):
412
956
"""Disable this client."""
413
957
if not getattr(self, "enabled", False):
414
958
return False
415
959
if not quiet:
416
self.send_changedstate()
417
if not quiet:
418
960
logger.info("Disabling client %s", self.name)
419
if getattr(self, "disable_initiator_tag", False):
420
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)
421
963
self.disable_initiator_tag = None
422
964
self.expires = None
423
if getattr(self, "checker_initiator_tag", False):
424
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)
425
967
self.checker_initiator_tag = None
426
968
self.stop_checker()
427
if self.disable_hook:
428
self.disable_hook(self)
429
969
self.enabled = False
430
# 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
431
973
return False
432
974
433
975
def __del__(self):
434
self.disable_hook = None
435
976
self.disable()
436
437
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):
438
996
"""The checker has completed, so take appropriate actions."""
439
997
self.checker_callback_tag = None
440
998
self.checker = None
441
if os.WIFEXITED(condition):
442
exitstatus = os.WEXITSTATUS(condition)
443
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:
444
1007
logger.info("Checker for %(name)s succeeded",
445
1008
vars(self))
446
1009
self.checked_ok()
447
1010
else:
448
logger.info("Checker for %(name)s failed",
449
vars(self))
1011
logger.info("Checker for %(name)s failed", vars(self))
450
1012
else:
1013
self.last_checker_status = -1
1014
self.last_checker_signal = -returncode
451
1015
logger.warning("Checker for %(name)s crashed?",
452
1016
vars(self))
453
454
def checked_ok(self, timeout=None):
455
"""Bump up the timeout for this client.
456
457
This should only be called when the client has been seen,
458
alive and well.
459
"""
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."""
460
1028
if timeout is None:
461
1029
timeout = self.timeout
462
self.last_checked_ok = datetime.datetime.utcnow()
463
gobject.source_remove(self.disable_initiator_tag)
464
self.expires = datetime.datetime.utcnow() + timeout
465
self.disable_initiator_tag = (gobject.timeout_add
466
(self._timedelta_to_milliseconds(timeout),
467
self.disable))
468
1030
if self.disable_initiator_tag is not None:
1031
GLib.source_remove(self.disable_initiator_tag)
1032
self.disable_initiator_tag = None
1033
if getattr(self, "enabled", False):
1034
self.disable_initiator_tag = GLib.timeout_add(
1035
int(timeout.total_seconds() * 1000), self.disable)
1036
self.expires = datetime.datetime.utcnow() + timeout
1037
469
1038
def need_approval(self):
470
1039
self.last_approval_request = datetime.datetime.utcnow()
471
1040
472
1041
def start_checker(self):
473
1042
"""Start a new checker subprocess if one is not running.
474
1043
475
1044
If a checker already exists, leave it running and do
476
1045
nothing."""
477
1046
# The reason for not killing a running checker is that if we
478
# did that, then if a checker (for some reason) started
479
# running slowly and taking more than 'interval' time, the
480
# client would inevitably timeout, since no checker would get
481
# 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
482
1051
# checkers alone, the checker would have to take more time
483
1052
# than 'timeout' for the client to be disabled, which is as it
484
1053
# should be.
485
486
# If a checker exists, make sure it is not a zombie
487
try:
488
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
489
except (AttributeError, OSError) as error:
490
if (isinstance(error, OSError)
491
and error.errno != errno.ECHILD):
492
raise error
493
else:
494
if pid:
495
logger.warning("Checker was a zombie")
496
gobject.source_remove(self.checker_callback_tag)
497
self.checker_callback(pid, status,
498
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
499
1059
# Start a new checker if needed
500
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}
501
1065
try:
502
# In case checker_command has exactly one % operator
503
command = self.checker_command % self.host
504
except TypeError:
505
# Escape attributes for the shell
506
escaped_attrs = dict(
507
(attr,
508
re.escape(unicode(str(getattr(self, attr, "")),
509
errors=
510
'replace')))
511
for attr in
512
self.runtime_expansions)
513
514
try:
515
command = self.checker_command % escaped_attrs
516
except TypeError as error:
517
logger.error('Could not format string "%s":'
518
' %s', self.checker_command, error)
519
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
520
1072
self.current_checker_command = command
521
try:
522
logger.info("Starting checker %r for %s",
523
command, self.name)
524
# We don't need to redirect stdout and stderr, since
525
# in normal mode, that is already done by daemon(),
526
# and in debug mode we don't want to. (Stdin is
527
# always replaced by /dev/null.)
528
self.checker = subprocess.Popen(command,
529
close_fds=True,
530
shell=True, cwd="/")
531
self.checker_callback_tag = (gobject.child_watch_add
532
(self.checker.pid,
533
self.checker_callback,
534
data=command))
535
# The checker may have completed before the gobject
536
# watch was added. Check for this.
537
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
538
if pid:
539
gobject.source_remove(self.checker_callback_tag)
540
self.checker_callback(pid, status, command)
541
except OSError as error:
542
logger.error("Failed to start subprocess: %s",
543
error)
544
# 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
545
1099
return True
546
1100
547
1101
def stop_checker(self):
548
1102
"""Force the checker process, if any, to stop."""
549
1103
if self.checker_callback_tag:
550
gobject.source_remove(self.checker_callback_tag)
1104
GLib.source_remove(self.checker_callback_tag)
551
1105
self.checker_callback_tag = None
552
1106
if getattr(self, "checker", None) is None:
553
1107
return
554
1108
logger.debug("Stopping checker for %(name)s", vars(self))
555
try:
556
os.kill(self.checker.pid, signal.SIGTERM)
557
#time.sleep(0.5)
558
#if self.checker.poll() is None:
559
# os.kill(self.checker.pid, signal.SIGKILL)
560
except OSError as error:
561
if error.errno != errno.ESRCH: # No such process
562
raise
1109
self.checker.terminate()
563
1110
self.checker = None
564
1111
565
def dbus_service_property(dbus_interface, signature="v",
566
access="readwrite", byte_arrays=False):
1112
1113
def dbus_service_property(dbus_interface,
1114
signature="v",
1115
access="readwrite",
1116
byte_arrays=False):
567
1117
"""Decorators for marking methods of a DBusObjectWithProperties to
568
1118
become properties on the D-Bus.
569
1119
570
1120
The decorated method will be called with no arguments by "Get"
571
1121
and with one argument by "Set".
572
1122
573
1123
The parameters, where they are supported, are the same as
574
1124
dbus.service.method, except there is only "signature", since the
575
1125
type from Get() and the type sent to Set() is the same.
578
1128
# "Set" method, so we fail early here:
579
1129
if byte_arrays and signature != "ay":
580
1130
raise ValueError("Byte arrays not supported for non-'ay'"
581
" signature %r" % signature)
1131
" signature {!r}".format(signature))
1132
582
1133
def decorator(func):
583
1134
func._dbus_is_property = True
584
1135
func._dbus_interface = dbus_interface
587
1138
func._dbus_name = func.__name__
588
1139
if func._dbus_name.endswith("_dbus_property"):
589
1140
func._dbus_name = func._dbus_name[:-14]
590
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
591
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
592
1187
return decorator
593
1188
594
1189
595
1190
class DBusPropertyException(dbus.exceptions.DBusException):
596
1191
"""A base class for D-Bus property-related exceptions
597
1192
"""
598
def __unicode__(self):
599
return unicode(str(self))
1193
pass
600
1194
601
1195
602
1196
class DBusPropertyAccessException(DBusPropertyException):
611
1205
pass
612
1206
613
1207
614
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):
615
1298
"""A D-Bus object with properties.
616
1299
617
1300
Classes inheriting from this can use the dbus_service_property
618
1301
decorator to expose methods as D-Bus properties. It exposes the
619
1302
standard Get(), Set(), and GetAll() methods on the D-Bus.
620
1303
"""
621
622
@staticmethod
623
def _is_dbus_property(obj):
624
return getattr(obj, "_dbus_is_property", False)
625
626
def _get_all_dbus_properties(self):
627
"""Returns a generator of (name, attribute) pairs
628
"""
629
return ((prop._dbus_name, prop)
630
for name, prop in
631
inspect.getmembers(self, self._is_dbus_property))
632
1304
633
1305
def _get_dbus_property(self, interface_name, property_name):
634
1306
"""Returns a bound method if one exists which is a D-Bus
635
1307
property with the specified name and interface.
636
1308
"""
637
for name in (property_name,
638
property_name + "_dbus_property"):
639
prop = getattr(self, name, None)
640
if (prop is None
641
or not self._is_dbus_property(prop)
642
or prop._dbus_name != property_name
643
or (interface_name and prop._dbus_interface
644
and interface_name != prop._dbus_interface)):
645
continue
646
return prop
1309
for cls in self.__class__.__mro__:
1310
for name, value in inspect.getmembers(
1311
cls, self._is_dbus_thing("property")):
1312
if (value._dbus_name == property_name
1313
and value._dbus_interface == interface_name):
1314
return value.__get__(self)
1315
647
1316
# No such property
648
raise DBusPropertyNotFound(self.dbus_object_path + ":"
649
+ interface_name + "."
650
+ property_name)
651
652
@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",
653
1331
out_signature="v")
654
1332
def Get(self, interface_name, property_name):
655
1333
"""Standard D-Bus property Get() method, see D-Bus standard.
661
1339
if not hasattr(value, "variant_level"):
662
1340
return value
663
1341
return type(value)(value, variant_level=value.variant_level+1)
664
1342
665
1343
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
666
1344
def Set(self, interface_name, property_name, value):
667
1345
"""Standard D-Bus property Set() method, see D-Bus standard.
673
1351
# The byte_arrays option is not supported yet on
674
1352
# signatures other than "ay".
675
1353
if prop._dbus_signature != "ay":
676
raise ValueError
677
value = dbus.ByteArray(''.join(unichr(byte)
678
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))
679
1359
prop(value)
680
681
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
1360
1361
@dbus.service.method(dbus.PROPERTIES_IFACE,
1362
in_signature="s",
682
1363
out_signature="a{sv}")
683
1364
def GetAll(self, interface_name):
684
1365
"""Standard D-Bus property GetAll() method, see D-Bus
686
1367
687
1368
Note: Will not include properties with access="write".
688
1369
"""
689
all = {}
690
for name, prop in self._get_all_dbus_properties():
1370
properties = {}
1371
for name, prop in self._get_all_dbus_things("property"):
691
1372
if (interface_name
692
1373
and interface_name != prop._dbus_interface):
693
1374
# Interface non-empty but did not match
697
1378
continue
698
1379
value = prop()
699
1380
if not hasattr(value, "variant_level"):
700
all[name] = value
1381
properties[name] = value
701
1382
continue
702
all[name] = type(value)(value, variant_level=
703
value.variant_level+1)
704
return dbus.Dictionary(all, signature="sv")
705
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
706
1395
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
707
1396
out_signature="s",
708
1397
path_keyword='object_path',
709
1398
connection_keyword='connection')
710
1399
def Introspect(self, object_path, connection):
711
"""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.
712
1403
"""
713
xmlstring = dbus.service.Object.Introspect(self, object_path,
714
connection)
1404
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1405
object_path,
1406
connection)
715
1407
try:
716
1408
document = xml.dom.minidom.parseString(xmlstring)
1409
717
1410
def make_tag(document, name, prop):
718
1411
e = document.createElement("property")
719
1412
e.setAttribute("name", name)
720
1413
e.setAttribute("type", prop._dbus_signature)
721
1414
e.setAttribute("access", prop._dbus_access)
722
1415
return e
1416
723
1417
for if_tag in document.getElementsByTagName("interface"):
1418
# Add property tags
724
1419
for tag in (make_tag(document, name, prop)
725
1420
for name, prop
726
in self._get_all_dbus_properties()
1421
in self._get_all_dbus_things("property")
727
1422
if prop._dbus_interface
728
1423
== if_tag.getAttribute("name")):
729
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)
730
1441
# Add the names to the return values for the
731
1442
# "org.freedesktop.DBus.Properties" methods
732
1443
if (if_tag.getAttribute("name")
747
1458
except (AttributeError, xml.dom.DOMException,
748
1459
xml.parsers.expat.ExpatError) as error:
749
1460
logger.error("Failed to override Introspection method",
750
error)
751
return xmlstring
752
753
1461
exc_info=error)
1462
return xmlstring
1463
1464
try:
1465
dbus.OBJECT_MANAGER_IFACE
1466
except AttributeError:
1467
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1468
1469
1470
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1471
"""A D-Bus object with an ObjectManager.
1472
1473
Classes inheriting from this exposes the standard
1474
GetManagedObjects call and the InterfacesAdded and
1475
InterfacesRemoved signals on the standard
1476
"org.freedesktop.DBus.ObjectManager" interface.
1477
1478
Note: No signals are sent automatically; they must be sent
1479
manually.
1480
"""
1481
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1482
out_signature="a{oa{sa{sv}}}")
1483
def GetManagedObjects(self):
1484
"""This function must be overridden"""
1485
raise NotImplementedError()
1486
1487
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1488
signature="oa{sa{sv}}")
1489
def InterfacesAdded(self, object_path, interfaces_and_properties):
1490
pass
1491
1492
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1493
def InterfacesRemoved(self, object_path, interfaces):
1494
pass
1495
1496
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1497
out_signature="s",
1498
path_keyword='object_path',
1499
connection_keyword='connection')
1500
def Introspect(self, object_path, connection):
1501
"""Overloading of standard D-Bus method.
1502
1503
Override return argument name of GetManagedObjects to be
1504
"objpath_interfaces_and_properties"
1505
"""
1506
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1507
object_path,
1508
connection)
1509
try:
1510
document = xml.dom.minidom.parseString(xmlstring)
1511
1512
for if_tag in document.getElementsByTagName("interface"):
1513
# Fix argument name for the GetManagedObjects method
1514
if (if_tag.getAttribute("name")
1515
== dbus.OBJECT_MANAGER_IFACE):
1516
for cn in if_tag.getElementsByTagName("method"):
1517
if (cn.getAttribute("name")
1518
== "GetManagedObjects"):
1519
for arg in cn.getElementsByTagName("arg"):
1520
if (arg.getAttribute("direction")
1521
== "out"):
1522
arg.setAttribute(
1523
"name",
1524
"objpath_interfaces"
1525
"_and_properties")
1526
xmlstring = document.toxml("utf-8")
1527
document.unlink()
1528
except (AttributeError, xml.dom.DOMException,
1529
xml.parsers.expat.ExpatError) as error:
1530
logger.error("Failed to override Introspection method",
1531
exc_info=error)
1532
return xmlstring
1533
1534
1535
def datetime_to_dbus(dt, variant_level=0):
1536
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1537
if dt is None:
1538
return dbus.String("", variant_level=variant_level)
1539
return dbus.String(dt.isoformat(), variant_level=variant_level)
1540
1541
1542
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1543
"""A class decorator; applied to a subclass of
1544
dbus.service.Object, it will add alternate D-Bus attributes with
1545
interface names according to the "alt_interface_names" mapping.
1546
Usage:
1547
1548
@alternate_dbus_interfaces({"org.example.Interface":
1549
"net.example.AlternateInterface"})
1550
class SampleDBusObject(dbus.service.Object):
1551
@dbus.service.method("org.example.Interface")
1552
def SampleDBusMethod():
1553
pass
1554
1555
The above "SampleDBusMethod" on "SampleDBusObject" will be
1556
reachable via two interfaces: "org.example.Interface" and
1557
"net.example.AlternateInterface", the latter of which will have
1558
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1559
"true", unless "deprecate" is passed with a False value.
1560
1561
This works for methods and signals, and also for D-Bus properties
1562
(from DBusObjectWithProperties) and interfaces (from the
1563
dbus_interface_annotations decorator).
1564
"""
1565
1566
def wrapper(cls):
1567
for orig_interface_name, alt_interface_name in (
1568
alt_interface_names.items()):
1569
attr = {}
1570
interface_names = set()
1571
# Go though all attributes of the class
1572
for attrname, attribute in inspect.getmembers(cls):
1573
# Ignore non-D-Bus attributes, and D-Bus attributes
1574
# with the wrong interface name
1575
if (not hasattr(attribute, "_dbus_interface")
1576
or not attribute._dbus_interface.startswith(
1577
orig_interface_name)):
1578
continue
1579
# Create an alternate D-Bus interface name based on
1580
# the current name
1581
alt_interface = attribute._dbus_interface.replace(
1582
orig_interface_name, alt_interface_name)
1583
interface_names.add(alt_interface)
1584
# Is this a D-Bus signal?
1585
if getattr(attribute, "_dbus_is_signal", False):
1586
# Extract the original non-method undecorated
1587
# function by black magic
1588
if sys.version_info.major == 2:
1589
nonmethod_func = (dict(
1590
zip(attribute.func_code.co_freevars,
1591
attribute.__closure__))
1592
["func"].cell_contents)
1593
else:
1594
nonmethod_func = (dict(
1595
zip(attribute.__code__.co_freevars,
1596
attribute.__closure__))
1597
["func"].cell_contents)
1598
# Create a new, but exactly alike, function
1599
# object, and decorate it to be a new D-Bus signal
1600
# with the alternate D-Bus interface name
1601
new_function = copy_function(nonmethod_func)
1602
new_function = (dbus.service.signal(
1603
alt_interface,
1604
attribute._dbus_signature)(new_function))
1605
# Copy annotations, if any
1606
try:
1607
new_function._dbus_annotations = dict(
1608
attribute._dbus_annotations)
1609
except AttributeError:
1610
pass
1611
1612
# Define a creator of a function to call both the
1613
# original and alternate functions, so both the
1614
# original and alternate signals gets sent when
1615
# the function is called
1616
def fixscope(func1, func2):
1617
"""This function is a scope container to pass
1618
func1 and func2 to the "call_both" function
1619
outside of its arguments"""
1620
1621
@functools.wraps(func2)
1622
def call_both(*args, **kwargs):
1623
"""This function will emit two D-Bus
1624
signals by calling func1 and func2"""
1625
func1(*args, **kwargs)
1626
func2(*args, **kwargs)
1627
# Make wrapper function look like a D-Bus
1628
# signal
1629
for name, attr in inspect.getmembers(func2):
1630
if name.startswith("_dbus_"):
1631
setattr(call_both, name, attr)
1632
1633
return call_both
1634
# Create the "call_both" function and add it to
1635
# the class
1636
attr[attrname] = fixscope(attribute, new_function)
1637
# Is this a D-Bus method?
1638
elif getattr(attribute, "_dbus_is_method", False):
1639
# Create a new, but exactly alike, function
1640
# object. Decorate it to be a new D-Bus method
1641
# with the alternate D-Bus interface name. Add it
1642
# to the class.
1643
attr[attrname] = (
1644
dbus.service.method(
1645
alt_interface,
1646
attribute._dbus_in_signature,
1647
attribute._dbus_out_signature)
1648
(copy_function(attribute)))
1649
# Copy annotations, if any
1650
try:
1651
attr[attrname]._dbus_annotations = dict(
1652
attribute._dbus_annotations)
1653
except AttributeError:
1654
pass
1655
# Is this a D-Bus property?
1656
elif getattr(attribute, "_dbus_is_property", False):
1657
# Create a new, but exactly alike, function
1658
# object, and decorate it to be a new D-Bus
1659
# property with the alternate D-Bus interface
1660
# name. Add it to the class.
1661
attr[attrname] = (dbus_service_property(
1662
alt_interface, attribute._dbus_signature,
1663
attribute._dbus_access,
1664
attribute._dbus_get_args_options
1665
["byte_arrays"])
1666
(copy_function(attribute)))
1667
# Copy annotations, if any
1668
try:
1669
attr[attrname]._dbus_annotations = dict(
1670
attribute._dbus_annotations)
1671
except AttributeError:
1672
pass
1673
# Is this a D-Bus interface?
1674
elif getattr(attribute, "_dbus_is_interface", False):
1675
# Create a new, but exactly alike, function
1676
# object. Decorate it to be a new D-Bus interface
1677
# with the alternate D-Bus interface name. Add it
1678
# to the class.
1679
attr[attrname] = (
1680
dbus_interface_annotations(alt_interface)
1681
(copy_function(attribute)))
1682
if deprecate:
1683
# Deprecate all alternate interfaces
1684
iname = "_AlternateDBusNames_interface_annotation{}"
1685
for interface_name in interface_names:
1686
1687
@dbus_interface_annotations(interface_name)
1688
def func(self):
1689
return {"org.freedesktop.DBus.Deprecated":
1690
"true"}
1691
# Find an unused name
1692
for aname in (iname.format(i)
1693
for i in itertools.count()):
1694
if aname not in attr:
1695
attr[aname] = func
1696
break
1697
if interface_names:
1698
# Replace the class with a new subclass of it with
1699
# methods, signals, etc. as created above.
1700
if sys.version_info.major == 2:
1701
cls = type(b"{}Alternate".format(cls.__name__),
1702
(cls, ), attr)
1703
else:
1704
cls = type("{}Alternate".format(cls.__name__),
1705
(cls, ), attr)
1706
return cls
1707
1708
return wrapper
1709
1710
1711
@alternate_dbus_interfaces({"se.recompile.Mandos":
1712
"se.bsnet.fukt.Mandos"})
754
1713
class ClientDBus(Client, DBusObjectWithProperties):
755
1714
"""A Client class using D-Bus
756
1715
757
1716
Attributes:
758
1717
dbus_object_path: dbus.ObjectPath
759
1718
bus: dbus.SystemBus()
760
1719
"""
761
1720
762
1721
runtime_expansions = (Client.runtime_expansions
763
+ ("dbus_object_path",))
764
1722
+ ("dbus_object_path", ))
1723
1724
_interface = "se.recompile.Mandos.Client"
1725
765
1726
# dbus.service.Object doesn't use super(), so we can't either.
766
767
def __init__(self, bus = None, *args, **kwargs):
768
self._approvals_pending = 0
1727
1728
def __init__(self, bus=None, *args, **kwargs):
769
1729
self.bus = bus
770
1730
Client.__init__(self, *args, **kwargs)
771
1731
# Only now, when this client is initialized, can it show up on
772
1732
# the D-Bus
773
client_object_name = unicode(self.name).translate(
1733
client_object_name = str(self.name).translate(
774
1734
{ord("."): ord("_"),
775
1735
ord("-"): ord("_")})
776
self.dbus_object_path = (dbus.ObjectPath
777
("/clients/" + client_object_name))
1736
self.dbus_object_path = dbus.ObjectPath(
1737
"/clients/" + client_object_name)
778
1738
DBusObjectWithProperties.__init__(self, self.bus,
779
1739
self.dbus_object_path)
780
def _set_expires(self, value):
781
old_value = getattr(self, "_expires", None)
782
self._expires = value
783
if hasattr(self, "dbus_object_path") and old_value != value:
784
dbus_time = (self._datetime_to_dbus(self._expires,
785
variant_level=1))
786
self.PropertyChanged(dbus.String("Expires"),
787
dbus_time)
788
expires = property(lambda self: self._expires, _set_expires)
789
del _set_expires
790
791
def _get_approvals_pending(self):
792
return self._approvals_pending
793
def _set_approvals_pending(self, value):
794
old_value = self._approvals_pending
795
self._approvals_pending = value
796
bval = bool(value)
797
if (hasattr(self, "dbus_object_path")
798
and bval is not bool(old_value)):
799
dbus_bool = dbus.Boolean(bval, variant_level=1)
800
self.PropertyChanged(dbus.String("ApprovalPending"),
801
dbus_bool)
802
803
approvals_pending = property(_get_approvals_pending,
804
_set_approvals_pending)
805
del _get_approvals_pending, _set_approvals_pending
806
807
@staticmethod
808
def _datetime_to_dbus(dt, variant_level=0):
809
"""Convert a UTC datetime.datetime() to a D-Bus type."""
810
if dt is None:
811
return dbus.String("", variant_level = variant_level)
812
return dbus.String(dt.isoformat(),
813
variant_level=variant_level)
814
815
def enable(self):
816
oldstate = getattr(self, "enabled", False)
817
r = Client.enable(self)
818
if oldstate != self.enabled:
819
# Emit D-Bus signals
820
self.PropertyChanged(dbus.String("Enabled"),
821
dbus.Boolean(True, variant_level=1))
822
self.PropertyChanged(
823
dbus.String("LastEnabled"),
824
self._datetime_to_dbus(self.last_enabled,
825
variant_level=1))
826
return r
827
828
def disable(self, quiet = False):
829
oldstate = getattr(self, "enabled", False)
830
r = Client.disable(self, quiet=quiet)
831
if not quiet and oldstate != self.enabled:
832
# Emit D-Bus signal
833
self.PropertyChanged(dbus.String("Enabled"),
834
dbus.Boolean(False, variant_level=1))
835
return r
836
1740
1741
def notifychangeproperty(transform_func, dbus_name,
1742
type_func=lambda x: x,
1743
variant_level=1,
1744
invalidate_only=False,
1745
_interface=_interface):
1746
""" Modify a variable so that it's a property which announces
1747
its changes to DBus.
1748
1749
transform_fun: Function that takes a value and a variant_level
1750
and transforms it to a D-Bus type.
1751
dbus_name: D-Bus name of the variable
1752
type_func: Function that transform the value before sending it
1753
to the D-Bus. Default: no transform
1754
variant_level: D-Bus variant level. Default: 1
1755
"""
1756
attrname = "_{}".format(dbus_name)
1757
1758
def setter(self, value):
1759
if hasattr(self, "dbus_object_path"):
1760
if (not hasattr(self, attrname) or
1761
type_func(getattr(self, attrname, None))
1762
!= type_func(value)):
1763
if invalidate_only:
1764
self.PropertiesChanged(
1765
_interface, dbus.Dictionary(),
1766
dbus.Array((dbus_name, )))
1767
else:
1768
dbus_value = transform_func(
1769
type_func(value),
1770
variant_level=variant_level)
1771
self.PropertyChanged(dbus.String(dbus_name),
1772
dbus_value)
1773
self.PropertiesChanged(
1774
_interface,
1775
dbus.Dictionary({dbus.String(dbus_name):
1776
dbus_value}),
1777
dbus.Array())
1778
setattr(self, attrname, value)
1779
1780
return property(lambda self: getattr(self, attrname), setter)
1781
1782
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1783
approvals_pending = notifychangeproperty(dbus.Boolean,
1784
"ApprovalPending",
1785
type_func=bool)
1786
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1787
last_enabled = notifychangeproperty(datetime_to_dbus,
1788
"LastEnabled")
1789
checker = notifychangeproperty(
1790
dbus.Boolean, "CheckerRunning",
1791
type_func=lambda checker: checker is not None)
1792
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1793
"LastCheckedOK")
1794
last_checker_status = notifychangeproperty(dbus.Int16,
1795
"LastCheckerStatus")
1796
last_approval_request = notifychangeproperty(
1797
datetime_to_dbus, "LastApprovalRequest")
1798
approved_by_default = notifychangeproperty(dbus.Boolean,
1799
"ApprovedByDefault")
1800
approval_delay = notifychangeproperty(
1801
dbus.UInt64, "ApprovalDelay",
1802
type_func=lambda td: td.total_seconds() * 1000)
1803
approval_duration = notifychangeproperty(
1804
dbus.UInt64, "ApprovalDuration",
1805
type_func=lambda td: td.total_seconds() * 1000)
1806
host = notifychangeproperty(dbus.String, "Host")
1807
timeout = notifychangeproperty(
1808
dbus.UInt64, "Timeout",
1809
type_func=lambda td: td.total_seconds() * 1000)
1810
extended_timeout = notifychangeproperty(
1811
dbus.UInt64, "ExtendedTimeout",
1812
type_func=lambda td: td.total_seconds() * 1000)
1813
interval = notifychangeproperty(
1814
dbus.UInt64, "Interval",
1815
type_func=lambda td: td.total_seconds() * 1000)
1816
checker_command = notifychangeproperty(dbus.String, "Checker")
1817
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1818
invalidate_only=True)
1819
1820
del notifychangeproperty
1821
837
1822
def __del__(self, *args, **kwargs):
838
1823
try:
839
1824
self.remove_from_connection()
842
1827
if hasattr(DBusObjectWithProperties, "__del__"):
843
1828
DBusObjectWithProperties.__del__(self, *args, **kwargs)
844
1829
Client.__del__(self, *args, **kwargs)
845
846
def checker_callback(self, pid, condition, command,
847
*args, **kwargs):
848
self.checker_callback_tag = None
849
self.checker = None
850
# Emit D-Bus signal
851
self.PropertyChanged(dbus.String("CheckerRunning"),
852
dbus.Boolean(False, variant_level=1))
853
if os.WIFEXITED(condition):
854
exitstatus = os.WEXITSTATUS(condition)
1830
1831
def checker_callback(self, source, condition,
1832
connection, command, *args, **kwargs):
1833
ret = Client.checker_callback(self, source, condition,
1834
connection, command, *args,
1835
**kwargs)
1836
exitstatus = self.last_checker_status
1837
if exitstatus >= 0:
855
1838
# Emit D-Bus signal
856
1839
self.CheckerCompleted(dbus.Int16(exitstatus),
857
dbus.Int64(condition),
1840
# This is specific to GNU libC
1841
dbus.Int64(exitstatus << 8),
858
1842
dbus.String(command))
859
1843
else:
860
1844
# Emit D-Bus signal
861
1845
self.CheckerCompleted(dbus.Int16(-1),
862
dbus.Int64(condition),
1846
dbus.Int64(
1847
# This is specific to GNU libC
1848
(exitstatus << 8)
1849
| self.last_checker_signal),
863
1850
dbus.String(command))
864
865
return Client.checker_callback(self, pid, condition, command,
866
*args, **kwargs)
867
868
def checked_ok(self, *args, **kwargs):
869
Client.checked_ok(self, *args, **kwargs)
870
# Emit D-Bus signal
871
self.PropertyChanged(
872
dbus.String("LastCheckedOK"),
873
(self._datetime_to_dbus(self.last_checked_ok,
874
variant_level=1)))
875
876
def need_approval(self, *args, **kwargs):
877
r = Client.need_approval(self, *args, **kwargs)
878
# Emit D-Bus signal
879
self.PropertyChanged(
880
dbus.String("LastApprovalRequest"),
881
(self._datetime_to_dbus(self.last_approval_request,
882
variant_level=1)))
883
return r
884
1851
return ret
1852
885
1853
def start_checker(self, *args, **kwargs):
886
old_checker = self.checker
887
if self.checker is not None:
888
old_checker_pid = self.checker.pid
889
else:
890
old_checker_pid = None
1854
old_checker_pid = getattr(self.checker, "pid", None)
891
1855
r = Client.start_checker(self, *args, **kwargs)
892
1856
# Only if new checker process was started
893
1857
if (self.checker is not None
894
1858
and old_checker_pid != self.checker.pid):
895
1859
# Emit D-Bus signal
896
1860
self.CheckerStarted(self.current_checker_command)
897
self.PropertyChanged(
898
dbus.String("CheckerRunning"),
899
dbus.Boolean(True, variant_level=1))
900
return r
901
902
def stop_checker(self, *args, **kwargs):
903
old_checker = getattr(self, "checker", None)
904
r = Client.stop_checker(self, *args, **kwargs)
905
if (old_checker is not None
906
and getattr(self, "checker", None) is None):
907
self.PropertyChanged(dbus.String("CheckerRunning"),
908
dbus.Boolean(False, variant_level=1))
909
1861
return r
910
1862
911
1863
def _reset_approved(self):
912
self._approved = None
1864
self.approved = None
913
1865
return False
914
1866
915
1867
def approve(self, value=True):
1868
self.approved = value
1869
GLib.timeout_add(int(self.approval_duration.total_seconds()
1870
* 1000), self._reset_approved)
916
1871
self.send_changedstate()
917
self._approved = value
918
gobject.timeout_add(self._timedelta_to_milliseconds
919
(self.approval_duration),
920
self._reset_approved)
921
922
923
## D-Bus methods, signals & properties
924
_interface = "se.bsnet.fukt.Mandos.Client"
925
926
## Signals
927
1872
1873
# D-Bus methods, signals & properties
1874
1875
# Interfaces
1876
1877
# Signals
1878
928
1879
# CheckerCompleted - signal
929
1880
@dbus.service.signal(_interface, signature="nxs")
930
1881
def CheckerCompleted(self, exitcode, waitstatus, command):
931
1882
"D-Bus signal"
932
1883
pass
933
1884
934
1885
# CheckerStarted - signal
935
1886
@dbus.service.signal(_interface, signature="s")
936
1887
def CheckerStarted(self, command):
937
1888
"D-Bus signal"
938
1889
pass
939
1890
940
1891
# PropertyChanged - signal
1892
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
941
1893
@dbus.service.signal(_interface, signature="sv")
942
1894
def PropertyChanged(self, property, value):
943
1895
"D-Bus signal"
944
1896
pass
945
1897
946
1898
# GotSecret - signal
947
1899
@dbus.service.signal(_interface)
948
1900
def GotSecret(self):
951
1903
server to mandos-client
952
1904
"""
953
1905
pass
954
1906
955
1907
# Rejected - signal
956
1908
@dbus.service.signal(_interface, signature="s")
957
1909
def Rejected(self, reason):
958
1910
"D-Bus signal"
959
1911
pass
960
1912
961
1913
# NeedApproval - signal
962
1914
@dbus.service.signal(_interface, signature="tb")
963
1915
def NeedApproval(self, timeout, default):
964
1916
"D-Bus signal"
965
1917
return self.need_approval()
966
967
## Methods
968
1918
1919
# Methods
1920
969
1921
# Approve - method
970
1922
@dbus.service.method(_interface, in_signature="b")
971
1923
def Approve(self, value):
972
1924
self.approve(value)
973
1925
974
1926
# CheckedOK - method
975
1927
@dbus.service.method(_interface)
976
1928
def CheckedOK(self):
977
1929
self.checked_ok()
978
1930
979
1931
# Enable - method
1932
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
980
1933
@dbus.service.method(_interface)
981
1934
def Enable(self):
982
1935
"D-Bus method"
983
1936
self.enable()
984
1937
985
1938
# StartChecker - method
1939
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
986
1940
@dbus.service.method(_interface)
987
1941
def StartChecker(self):
988
1942
"D-Bus method"
989
1943
self.start_checker()
990
1944
991
1945
# Disable - method
1946
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
992
1947
@dbus.service.method(_interface)
993
1948
def Disable(self):
994
1949
"D-Bus method"
995
1950
self.disable()
996
1951
997
1952
# StopChecker - method
1953
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
998
1954
@dbus.service.method(_interface)
999
1955
def StopChecker(self):
1000
1956
self.stop_checker()
1001
1002
## Properties
1003
1957
1958
# Properties
1959
1004
1960
# ApprovalPending - property
1005
1961
@dbus_service_property(_interface, signature="b", access="read")
1006
1962
def ApprovalPending_dbus_property(self):
1007
1963
return dbus.Boolean(bool(self.approvals_pending))
1008
1964
1009
1965
# ApprovedByDefault - property
1010
@dbus_service_property(_interface, signature="b",
1966
@dbus_service_property(_interface,
1967
signature="b",
1011
1968
access="readwrite")
1012
1969
def ApprovedByDefault_dbus_property(self, value=None):
1013
1970
if value is None: # get
1014
1971
return dbus.Boolean(self.approved_by_default)
1015
old_value = self.approved_by_default
1016
1972
self.approved_by_default = bool(value)
1017
# Emit D-Bus signal
1018
if old_value != self.approved_by_default:
1019
self.PropertyChanged(dbus.String("ApprovedByDefault"),
1020
dbus.Boolean(value, variant_level=1))
1021
1973
1022
1974
# ApprovalDelay - property
1023
@dbus_service_property(_interface, signature="t",
1975
@dbus_service_property(_interface,
1976
signature="t",
1024
1977
access="readwrite")
1025
1978
def ApprovalDelay_dbus_property(self, value=None):
1026
1979
if value is None: # get
1027
return dbus.UInt64(self.approval_delay_milliseconds())
1028
old_value = self.approval_delay
1980
return dbus.UInt64(self.approval_delay.total_seconds()
1981
* 1000)
1029
1982
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1030
# Emit D-Bus signal
1031
if old_value != self.approval_delay:
1032
self.PropertyChanged(dbus.String("ApprovalDelay"),
1033
dbus.UInt64(value, variant_level=1))
1034
1983
1035
1984
# ApprovalDuration - property
1036
@dbus_service_property(_interface, signature="t",
1985
@dbus_service_property(_interface,
1986
signature="t",
1037
1987
access="readwrite")
1038
1988
def ApprovalDuration_dbus_property(self, value=None):
1039
1989
if value is None: # get
1040
return dbus.UInt64(self._timedelta_to_milliseconds(
1041
self.approval_duration))
1042
old_value = self.approval_duration
1990
return dbus.UInt64(self.approval_duration.total_seconds()
1991
* 1000)
1043
1992
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1044
# Emit D-Bus signal
1045
if old_value != self.approval_duration:
1046
self.PropertyChanged(dbus.String("ApprovalDuration"),
1047
dbus.UInt64(value, variant_level=1))
1048
1993
1049
1994
# Name - property
1995
@dbus_annotations(
1996
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1050
1997
@dbus_service_property(_interface, signature="s", access="read")
1051
1998
def Name_dbus_property(self):
1052
1999
return dbus.String(self.name)
1053
2000
1054
2001
# Fingerprint - property
2002
@dbus_annotations(
2003
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1055
2004
@dbus_service_property(_interface, signature="s", access="read")
1056
2005
def Fingerprint_dbus_property(self):
1057
2006
return dbus.String(self.fingerprint)
1058
2007
1059
2008
# Host - property
1060
@dbus_service_property(_interface, signature="s",
2009
@dbus_service_property(_interface,
2010
signature="s",
1061
2011
access="readwrite")
1062
2012
def Host_dbus_property(self, value=None):
1063
2013
if value is None: # get
1064
2014
return dbus.String(self.host)
1065
old_value = self.host
1066
self.host = value
1067
# Emit D-Bus signal
1068
if old_value != self.host:
1069
self.PropertyChanged(dbus.String("Host"),
1070
dbus.String(value, variant_level=1))
1071
2015
self.host = str(value)
2016
1072
2017
# Created - property
2018
@dbus_annotations(
2019
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1073
2020
@dbus_service_property(_interface, signature="s", access="read")
1074
2021
def Created_dbus_property(self):
1075
return dbus.String(self._datetime_to_dbus(self.created))
1076
2022
return datetime_to_dbus(self.created)
2023
1077
2024
# LastEnabled - property
1078
2025
@dbus_service_property(_interface, signature="s", access="read")
1079
2026
def LastEnabled_dbus_property(self):
1080
return self._datetime_to_dbus(self.last_enabled)
1081
2027
return datetime_to_dbus(self.last_enabled)
2028
1082
2029
# Enabled - property
1083
@dbus_service_property(_interface, signature="b",
2030
@dbus_service_property(_interface,
2031
signature="b",
1084
2032
access="readwrite")
1085
2033
def Enabled_dbus_property(self, value=None):
1086
2034
if value is None: # get
1089
2037
self.enable()
1090
2038
else:
1091
2039
self.disable()
1092
2040
1093
2041
# LastCheckedOK - property
1094
@dbus_service_property(_interface, signature="s",
2042
@dbus_service_property(_interface,
2043
signature="s",
1095
2044
access="readwrite")
1096
2045
def LastCheckedOK_dbus_property(self, value=None):
1097
2046
if value is not None:
1098
2047
self.checked_ok()
1099
2048
return
1100
return self._datetime_to_dbus(self.last_checked_ok)
1101
2049
return datetime_to_dbus(self.last_checked_ok)
2050
2051
# LastCheckerStatus - property
2052
@dbus_service_property(_interface, signature="n", access="read")
2053
def LastCheckerStatus_dbus_property(self):
2054
return dbus.Int16(self.last_checker_status)
2055
1102
2056
# Expires - property
1103
2057
@dbus_service_property(_interface, signature="s", access="read")
1104
2058
def Expires_dbus_property(self):
1105
return self._datetime_to_dbus(self.expires)
1106
2059
return datetime_to_dbus(self.expires)
2060
1107
2061
# LastApprovalRequest - property
1108
2062
@dbus_service_property(_interface, signature="s", access="read")
1109
2063
def LastApprovalRequest_dbus_property(self):
1110
return self._datetime_to_dbus(self.last_approval_request)
1111
2064
return datetime_to_dbus(self.last_approval_request)
2065
1112
2066
# Timeout - property
1113
@dbus_service_property(_interface, signature="t",
2067
@dbus_service_property(_interface,
2068
signature="t",
1114
2069
access="readwrite")
1115
2070
def Timeout_dbus_property(self, value=None):
1116
2071
if value is None: # get
1117
return dbus.UInt64(self.timeout_milliseconds())
1118
old_value = self.timeout
2072
return dbus.UInt64(self.timeout.total_seconds() * 1000)
2073
old_timeout = self.timeout
1119
2074
self.timeout = datetime.timedelta(0, 0, 0, value)
1120
# Emit D-Bus signal
1121
if old_value != self.timeout:
1122
self.PropertyChanged(dbus.String("Timeout"),
1123
dbus.UInt64(value, variant_level=1))
1124
if getattr(self, "disable_initiator_tag", None) is None:
1125
return
1126
# Reschedule timeout
1127
gobject.source_remove(self.disable_initiator_tag)
1128
self.disable_initiator_tag = None
1129
self.expires = None
1130
time_to_die = (self.
1131
_timedelta_to_milliseconds((self
1132
.last_checked_ok
1133
+ self.timeout)
1134
- datetime.datetime
1135
.utcnow()))
1136
if time_to_die <= 0:
1137
# The timeout has passed
1138
self.disable()
1139
else:
1140
self.expires = (datetime.datetime.utcnow()
1141
+ datetime.timedelta(milliseconds = time_to_die))
1142
self.disable_initiator_tag = (gobject.timeout_add
1143
(time_to_die, self.disable))
2075
# Reschedule disabling
2076
if self.enabled:
2077
now = datetime.datetime.utcnow()
2078
self.expires += self.timeout - old_timeout
2079
if self.expires <= now:
2080
# The timeout has passed
2081
self.disable()
2082
else:
2083
if (getattr(self, "disable_initiator_tag", None)
2084
is None):
2085
return
2086
GLib.source_remove(self.disable_initiator_tag)
2087
self.disable_initiator_tag = GLib.timeout_add(
2088
int((self.expires - now).total_seconds() * 1000),
2089
self.disable)
1144
2090
1145
2091
# ExtendedTimeout - property
1146
@dbus_service_property(_interface, signature="t",
2092
@dbus_service_property(_interface,
2093
signature="t",
1147
2094
access="readwrite")
1148
2095
def ExtendedTimeout_dbus_property(self, value=None):
1149
2096
if value is None: # get
1150
return dbus.UInt64(self.extended_timeout_milliseconds())
1151
old_value = self.extended_timeout
2097
return dbus.UInt64(self.extended_timeout.total_seconds()
2098
* 1000)
1152
2099
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1153
# Emit D-Bus signal
1154
if old_value != self.extended_timeout:
1155
self.PropertyChanged(dbus.String("ExtendedTimeout"),
1156
dbus.UInt64(value, variant_level=1))
1157
2100
1158
2101
# Interval - property
1159
@dbus_service_property(_interface, signature="t",
2102
@dbus_service_property(_interface,
2103
signature="t",
1160
2104
access="readwrite")
1161
2105
def Interval_dbus_property(self, value=None):
1162
2106
if value is None: # get
1163
return dbus.UInt64(self.interval_milliseconds())
1164
old_value = self.interval
2107
return dbus.UInt64(self.interval.total_seconds() * 1000)
1165
2108
self.interval = datetime.timedelta(0, 0, 0, value)
1166
# Emit D-Bus signal
1167
if old_value != self.interval:
1168
self.PropertyChanged(dbus.String("Interval"),
1169
dbus.UInt64(value, variant_level=1))
1170
2109
if getattr(self, "checker_initiator_tag", None) is None:
1171
2110
return
1172
# Reschedule checker run
1173
gobject.source_remove(self.checker_initiator_tag)
1174
self.checker_initiator_tag = (gobject.timeout_add
1175
(value, self.start_checker))
1176
self.start_checker() # Start one now, too
2111
if self.enabled:
2112
# Reschedule checker run
2113
GLib.source_remove(self.checker_initiator_tag)
2114
self.checker_initiator_tag = GLib.timeout_add(
2115
value, self.start_checker)
2116
self.start_checker() # Start one now, too
1177
2117
1178
2118
# Checker - property
1179
@dbus_service_property(_interface, signature="s",
2119
@dbus_service_property(_interface,
2120
signature="s",
1180
2121
access="readwrite")
1181
2122
def Checker_dbus_property(self, value=None):
1182
2123
if value is None: # get
1183
2124
return dbus.String(self.checker_command)
1184
old_value = self.checker_command
1185
self.checker_command = value
1186
# Emit D-Bus signal
1187
if old_value != self.checker_command:
1188
self.PropertyChanged(dbus.String("Checker"),
1189
dbus.String(self.checker_command,
1190
variant_level=1))
1191
2125
self.checker_command = str(value)
2126
1192
2127
# CheckerRunning - property
1193
@dbus_service_property(_interface, signature="b",
2128
@dbus_service_property(_interface,
2129
signature="b",
1194
2130
access="readwrite")
1195
2131
def CheckerRunning_dbus_property(self, value=None):
1196
2132
if value is None: # get
1199
2135
self.start_checker()
1200
2136
else:
1201
2137
self.stop_checker()
1202
2138
1203
2139
# ObjectPath - property
2140
@dbus_annotations(
2141
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
2142
"org.freedesktop.DBus.Deprecated": "true"})
1204
2143
@dbus_service_property(_interface, signature="o", access="read")
1205
2144
def ObjectPath_dbus_property(self):
1206
return self.dbus_object_path # is already a dbus.ObjectPath
1207
2145
return self.dbus_object_path # is already a dbus.ObjectPath
2146
1208
2147
# Secret = property
1209
@dbus_service_property(_interface, signature="ay",
1210
access="write", byte_arrays=True)
2148
@dbus_annotations(
2149
{"org.freedesktop.DBus.Property.EmitsChangedSignal":
2150
"invalidates"})
2151
@dbus_service_property(_interface,
2152
signature="ay",
2153
access="write",
2154
byte_arrays=True)
1211
2155
def Secret_dbus_property(self, value):
1212
self.secret = str(value)
1213
2156
self.secret = bytes(value)
2157
1214
2158
del _interface
1215
2159
1216
2160
1219
2163
self._pipe = child_pipe
1220
2164
self._pipe.send(('init', fpr, address))
1221
2165
if not self._pipe.recv():
1222
raise KeyError()
2166
raise KeyError(fpr)
1223
2167
1224
2168
def __getattribute__(self, name):
1225
if(name == '_pipe'):
2169
if name == '_pipe':
1226
2170
return super(ProxyClient, self).__getattribute__(name)
1227
2171
self._pipe.send(('getattr', name))
1228
2172
data = self._pipe.recv()
1229
2173
if data[0] == 'data':
1230
2174
return data[1]
1231
2175
if data[0] == 'function':
2176
1232
2177
def func(*args, **kwargs):
1233
2178
self._pipe.send(('funcall', name, args, kwargs))
1234
2179
return self._pipe.recv()[1]
2180
1235
2181
return func
1236
2182
1237
2183
def __setattr__(self, name, value):
1238
if(name == '_pipe'):
2184
if name == '_pipe':
1239
2185
return super(ProxyClient, self).__setattr__(name, value)
1240
2186
self._pipe.send(('setattr', name, value))
1241
2187
1242
2188
1243
2189
class ClientHandler(socketserver.BaseRequestHandler, object):
1244
2190
"""A class to handle client connections.
1245
2191
1246
2192
Instantiated once for each connection to handle it.
1247
2193
Note: This will run in its own forked process."""
1248
2194
1249
2195
def handle(self):
1250
2196
with contextlib.closing(self.server.child_pipe) as child_pipe:
1251
2197
logger.info("TCP connection from: %s",
1252
unicode(self.client_address))
2198
str(self.client_address))
1253
2199
logger.debug("Pipe FD: %d",
1254
2200
self.server.child_pipe.fileno())
1255
2201
1256
session = (gnutls.connection
1257
.ClientSession(self.request,
1258
gnutls.connection
1259
.X509Credentials()))
1260
1261
# Note: gnutls.connection.X509Credentials is really a
1262
# generic GnuTLS certificate credentials object so long as
1263
# no X.509 keys are added to it. Therefore, we can use it
1264
# here despite using OpenPGP certificates.
1265
1266
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1267
# "+AES-256-CBC", "+SHA1",
1268
# "+COMP-NULL", "+CTYPE-OPENPGP",
1269
# "+DHE-DSS"))
2202
session = gnutls.ClientSession(self.request)
2203
2204
# priority = ':'.join(("NONE", "+VERS-TLS1.1",
2205
# "+AES-256-CBC", "+SHA1",
2206
# "+COMP-NULL", "+CTYPE-OPENPGP",
2207
# "+DHE-DSS"))
1270
2208
# Use a fallback default, since this MUST be set.
1271
2209
priority = self.server.gnutls_priority
1272
2210
if priority is None:
1273
2211
priority = "NORMAL"
1274
(gnutls.library.functions
1275
.gnutls_priority_set_direct(session._c_object,
1276
priority, None))
2212
gnutls.priority_set_direct(session._c_object,
2213
priority.encode("utf-8"),
2214
None)
1277
2215
1278
2216
# Start communication using the Mandos protocol
1279
2217
# Get protocol number
1281
2219
logger.debug("Protocol version: %r", line)
1282
2220
try:
1283
2221
if int(line.strip().split()[0]) > 1:
1284
raise RuntimeError
2222
raise RuntimeError(line)
1285
2223
except (ValueError, IndexError, RuntimeError) as error:
1286
2224
logger.error("Unknown protocol version: %s", error)
1287
2225
return
1289
2227
# Start GnuTLS connection
1290
2228
try:
1291
2229
session.handshake()
1292
except gnutls.errors.GNUTLSError as error:
2230
except gnutls.Error as error:
1293
2231
logger.warning("Handshake failed: %s", error)
1294
2232
# Do not run session.bye() here: the session is not
1295
2233
# established. Just abandon the request.
1299
2237
approval_required = False
1300
2238
try:
1301
2239
try:
1302
fpr = self.fingerprint(self.peer_certificate
1303
(session))
1304
except (TypeError,
1305
gnutls.errors.GNUTLSError) as error:
2240
fpr = self.fingerprint(
2241
self.peer_certificate(session))
2242
except (TypeError, gnutls.Error) as error:
1306
2243
logger.warning("Bad certificate: %s", error)
1307
2244
return
1308
2245
logger.debug("Fingerprint: %s", fpr)
1312
2249
self.client_address)
1313
2250
except KeyError:
1314
2251
return
1315
2252
1316
2253
if client.approval_delay:
1317
2254
delay = client.approval_delay
1318
2255
client.approvals_pending += 1
1319
2256
approval_required = True
1320
2257
1321
2258
while True:
1322
2259
if not client.enabled:
1323
2260
logger.info("Client %s is disabled",
1324
client.name)
2261
client.name)
1325
2262
if self.server.use_dbus:
1326
2263
# Emit D-Bus signal
1327
client.Rejected("Disabled")
2264
client.Rejected("Disabled")
1328
2265
return
1329
1330
if client._approved or not client.approval_delay:
1331
#We are approved or approval is disabled
2266
2267
if client.approved or not client.approval_delay:
2268
# We are approved or approval is disabled
1332
2269
break
1333
elif client._approved is None:
2270
elif client.approved is None:
1334
2271
logger.info("Client %s needs approval",
1335
2272
client.name)
1336
2273
if self.server.use_dbus:
1337
2274
# Emit D-Bus signal
1338
2275
client.NeedApproval(
1339
client.approval_delay_milliseconds(),
1340
client.approved_by_default)
2276
client.approval_delay.total_seconds()
2277
* 1000, client.approved_by_default)
1341
2278
else:
1342
2279
logger.warning("Client %s was not approved",
1343
2280
client.name)
1345
2282
# Emit D-Bus signal
1346
2283
client.Rejected("Denied")
1347
2284
return
1348
1349
#wait until timeout or approved
1350
#x = float(client._timedelta_to_milliseconds(delay))
2285
2286
# wait until timeout or approved
1351
2287
time = datetime.datetime.now()
1352
2288
client.changedstate.acquire()
1353
client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))
2289
client.changedstate.wait(delay.total_seconds())
1354
2290
client.changedstate.release()
1355
2291
time2 = datetime.datetime.now()
1356
2292
if (time2 - time) >= delay:
1366
2302
break
1367
2303
else:
1368
2304
delay -= time2 - time
1369
1370
sent_size = 0
1371
while sent_size < len(client.secret):
1372
try:
1373
sent = session.send(client.secret[sent_size:])
1374
except gnutls.errors.GNUTLSError as error:
1375
logger.warning("gnutls send failed")
1376
return
1377
logger.debug("Sent: %d, remaining: %d",
1378
sent, len(client.secret)
1379
- (sent_size + sent))
1380
sent_size += sent
2305
2306
try:
2307
session.send(client.secret)
2308
except gnutls.Error as error:
2309
logger.warning("gnutls send failed",
2310
exc_info=error)
2311
return
1381
2312
1382
2313
logger.info("Sending secret to %s", client.name)
1383
# bump the timeout as if seen
1384
client.checked_ok(client.extended_timeout)
2314
# bump the timeout using extended_timeout
2315
client.bump_timeout(client.extended_timeout)
1385
2316
if self.server.use_dbus:
1386
2317
# Emit D-Bus signal
1387
2318
client.GotSecret()
1388
2319
1389
2320
finally:
1390
2321
if approval_required:
1391
2322
client.approvals_pending -= 1
1392
2323
try:
1393
2324
session.bye()
1394
except gnutls.errors.GNUTLSError as error:
1395
logger.warning("GnuTLS bye failed")
1396
2325
except gnutls.Error as error:
2326
logger.warning("GnuTLS bye failed",
2327
exc_info=error)
2328
1397
2329
@staticmethod
1398
2330
def peer_certificate(session):
1399
2331
"Return the peer's OpenPGP certificate as a bytestring"
1400
2332
# If not an OpenPGP certificate...
1401
if (gnutls.library.functions
1402
.gnutls_certificate_type_get(session._c_object)
1403
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1404
# ...do the normal thing
1405
return session.peer_certificate
2333
if (gnutls.certificate_type_get(session._c_object)
2334
!= gnutls.CRT_OPENPGP):
2335
# ...return invalid data
2336
return b""
1406
2337
list_size = ctypes.c_uint(1)
1407
cert_list = (gnutls.library.functions
1408
.gnutls_certificate_get_peers
2338
cert_list = (gnutls.certificate_get_peers
1409
2339
(session._c_object, ctypes.byref(list_size)))
1410
2340
if not bool(cert_list) and list_size.value != 0:
1411
raise gnutls.errors.GNUTLSError("error getting peer"
1412
" certificate")
2341
raise gnutls.Error("error getting peer certificate")
1413
2342
if list_size.value == 0:
1414
2343
return None
1415
2344
cert = cert_list[0]
1416
2345
return ctypes.string_at(cert.data, cert.size)
1417
2346
1418
2347
@staticmethod
1419
2348
def fingerprint(openpgp):
1420
2349
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1421
2350
# New GnuTLS "datum" with the OpenPGP public key
1422
datum = (gnutls.library.types
1423
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1424
ctypes.POINTER
1425
(ctypes.c_ubyte)),
1426
ctypes.c_uint(len(openpgp))))
2351
datum = gnutls.datum_t(
2352
ctypes.cast(ctypes.c_char_p(openpgp),
2353
ctypes.POINTER(ctypes.c_ubyte)),
2354
ctypes.c_uint(len(openpgp)))
1427
2355
# New empty GnuTLS certificate
1428
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1429
(gnutls.library.functions
1430
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
2356
crt = gnutls.openpgp_crt_t()
2357
gnutls.openpgp_crt_init(ctypes.byref(crt))
1431
2358
# Import the OpenPGP public key into the certificate
1432
(gnutls.library.functions
1433
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1434
gnutls.library.constants
1435
.GNUTLS_OPENPGP_FMT_RAW))
2359
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2360
gnutls.OPENPGP_FMT_RAW)
1436
2361
# Verify the self signature in the key
1437
2362
crtverify = ctypes.c_uint()
1438
(gnutls.library.functions
1439
.gnutls_openpgp_crt_verify_self(crt, 0,
1440
ctypes.byref(crtverify)))
2363
gnutls.openpgp_crt_verify_self(crt, 0,
2364
ctypes.byref(crtverify))
1441
2365
if crtverify.value != 0:
1442
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1443
raise (gnutls.errors.CertificateSecurityError
1444
("Verify failed"))
2366
gnutls.openpgp_crt_deinit(crt)
2367
raise gnutls.CertificateSecurityError("Verify failed")
1445
2368
# New buffer for the fingerprint
1446
2369
buf = ctypes.create_string_buffer(20)
1447
2370
buf_len = ctypes.c_size_t()
1448
2371
# Get the fingerprint from the certificate into the buffer
1449
(gnutls.library.functions
1450
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1451
ctypes.byref(buf_len)))
2372
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2373
ctypes.byref(buf_len))
1452
2374
# Deinit the certificate
1453
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2375
gnutls.openpgp_crt_deinit(crt)
1454
2376
# Convert the buffer to a Python bytestring
1455
2377
fpr = ctypes.string_at(buf, buf_len.value)
1456
2378
# Convert the bytestring to hexadecimal notation
1457
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
2379
hex_fpr = binascii.hexlify(fpr).upper()
1458
2380
return hex_fpr
1459
2381
1460
2382
1461
2383
class MultiprocessingMixIn(object):
1462
2384
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2385
1463
2386
def sub_process_main(self, request, address):
1464
2387
try:
1465
2388
self.finish_request(request, address)
1466
except:
2389
except Exception:
1467
2390
self.handle_error(request, address)
1468
2391
self.close_request(request)
1469
2392
1470
2393
def process_request(self, request, address):
1471
2394
"""Start a new process to process the request."""
1472
multiprocessing.Process(target = self.sub_process_main,
1473
args = (request, address)).start()
2395
proc = multiprocessing.Process(target=self.sub_process_main,
2396
args=(request, address))
2397
proc.start()
2398
return proc
2399
1474
2400
1475
2401
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1476
2402
""" adds a pipe to the MixIn """
2403
1477
2404
def process_request(self, request, client_address):
1478
2405
"""Overrides and wraps the original process_request().
1479
2406
1480
2407
This function creates a new pipe in self.pipe
1481
2408
"""
1482
2409
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1483
2410
1484
super(MultiprocessingMixInWithPipe,
1485
self).process_request(request, client_address)
2411
proc = MultiprocessingMixIn.process_request(self, request,
2412
client_address)
1486
2413
self.child_pipe.close()
1487
self.add_pipe(parent_pipe)
2414
self.add_pipe(parent_pipe, proc)
1488
2415
1489
def add_pipe(self, parent_pipe):
2416
def add_pipe(self, parent_pipe, proc):
1490
2417
"""Dummy function; override as necessary"""
1491
raise NotImplementedError
2418
raise NotImplementedError()
2419
1492
2420
1493
2421
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1494
2422
socketserver.TCPServer, object):
1495
2423
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1496
2424
1497
2425
Attributes:
1498
2426
enabled: Boolean; whether this server is activated yet
1499
2427
interface: None or a network interface name (string)
1500
2428
use_ipv6: Boolean; to use IPv6 or not
1501
2429
"""
2430
1502
2431
def __init__(self, server_address, RequestHandlerClass,
1503
interface=None, use_ipv6=True):
2432
interface=None,
2433
use_ipv6=True,
2434
socketfd=None):
2435
"""If socketfd is set, use that file descriptor instead of
2436
creating a new one with socket.socket().
2437
"""
1504
2438
self.interface = interface
1505
2439
if use_ipv6:
1506
2440
self.address_family = socket.AF_INET6
2441
if socketfd is not None:
2442
# Save the file descriptor
2443
self.socketfd = socketfd
2444
# Save the original socket.socket() function
2445
self.socket_socket = socket.socket
2446
2447
# To implement --socket, we monkey patch socket.socket.
2448
#
2449
# (When socketserver.TCPServer is a new-style class, we
2450
# could make self.socket into a property instead of monkey
2451
# patching socket.socket.)
2452
#
2453
# Create a one-time-only replacement for socket.socket()
2454
@functools.wraps(socket.socket)
2455
def socket_wrapper(*args, **kwargs):
2456
# Restore original function so subsequent calls are
2457
# not affected.
2458
socket.socket = self.socket_socket
2459
del self.socket_socket
2460
# This time only, return a new socket object from the
2461
# saved file descriptor.
2462
return socket.fromfd(self.socketfd, *args, **kwargs)
2463
# Replace socket.socket() function with wrapper
2464
socket.socket = socket_wrapper
2465
# The socketserver.TCPServer.__init__ will call
2466
# socket.socket(), which might be our replacement,
2467
# socket_wrapper(), if socketfd was set.
1507
2468
socketserver.TCPServer.__init__(self, server_address,
1508
2469
RequestHandlerClass)
2470
1509
2471
def server_bind(self):
1510
2472
"""This overrides the normal server_bind() function
1511
2473
to bind to an interface if one was specified, and also NOT to
1512
2474
bind to an address or port if they were not specified."""
2475
global SO_BINDTODEVICE
1513
2476
if self.interface is not None:
1514
2477
if SO_BINDTODEVICE is None:
1515
logger.error("SO_BINDTODEVICE does not exist;"
1516
" cannot bind to interface %s",
1517
self.interface)
1518
else:
1519
try:
1520
self.socket.setsockopt(socket.SOL_SOCKET,
1521
SO_BINDTODEVICE,
1522
str(self.interface
1523
+ '\0'))
1524
except socket.error as error:
1525
if error[0] == errno.EPERM:
1526
logger.error("No permission to"
1527
" bind to interface %s",
1528
self.interface)
1529
elif error[0] == errno.ENOPROTOOPT:
1530
logger.error("SO_BINDTODEVICE not available;"
1531
" cannot bind to interface %s",
1532
self.interface)
1533
else:
1534
raise
2478
# Fall back to a hard-coded value which seems to be
2479
# common enough.
2480
logger.warning("SO_BINDTODEVICE not found, trying 25")
2481
SO_BINDTODEVICE = 25
2482
try:
2483
self.socket.setsockopt(
2484
socket.SOL_SOCKET, SO_BINDTODEVICE,
2485
(self.interface + "\0").encode("utf-8"))
2486
except socket.error as error:
2487
if error.errno == errno.EPERM:
2488
logger.error("No permission to bind to"
2489
" interface %s", self.interface)
2490
elif error.errno == errno.ENOPROTOOPT:
2491
logger.error("SO_BINDTODEVICE not available;"
2492
" cannot bind to interface %s",
2493
self.interface)
2494
elif error.errno == errno.ENODEV:
2495
logger.error("Interface %s does not exist,"
2496
" cannot bind", self.interface)
2497
else:
2498
raise
1535
2499
# Only bind(2) the socket if we really need to.
1536
2500
if self.server_address[0] or self.server_address[1]:
1537
2501
if not self.server_address[0]:
1538
2502
if self.address_family == socket.AF_INET6:
1539
any_address = "::" # in6addr_any
2503
any_address = "::" # in6addr_any
1540
2504
else:
1541
any_address = socket.INADDR_ANY
2505
any_address = "0.0.0.0" # INADDR_ANY
1542
2506
self.server_address = (any_address,
1543
2507
self.server_address[1])
1544
2508
elif not self.server_address[1]:
1545
self.server_address = (self.server_address[0],
1546
0)
2509
self.server_address = (self.server_address[0], 0)
1547
2510
# if self.interface:
1548
2511
# self.server_address = (self.server_address[0],
1549
2512
# 0, # port
1555
2518
1556
2519
class MandosServer(IPv6_TCPServer):
1557
2520
"""Mandos server.
1558
2521
1559
2522
Attributes:
1560
2523
clients: set of Client objects
1561
2524
gnutls_priority GnuTLS priority string
1562
2525
use_dbus: Boolean; to emit D-Bus signals or not
1563
1564
Assumes a gobject.MainLoop event loop.
2526
2527
Assumes a GLib.MainLoop event loop.
1565
2528
"""
2529
1566
2530
def __init__(self, server_address, RequestHandlerClass,
1567
interface=None, use_ipv6=True, clients=None,
1568
gnutls_priority=None, use_dbus=True):
2531
interface=None,
2532
use_ipv6=True,
2533
clients=None,
2534
gnutls_priority=None,
2535
use_dbus=True,
2536
socketfd=None):
1569
2537
self.enabled = False
1570
2538
self.clients = clients
1571
2539
if self.clients is None:
1572
self.clients = set()
2540
self.clients = {}
1573
2541
self.use_dbus = use_dbus
1574
2542
self.gnutls_priority = gnutls_priority
1575
2543
IPv6_TCPServer.__init__(self, server_address,
1576
2544
RequestHandlerClass,
1577
interface = interface,
1578
use_ipv6 = use_ipv6)
2545
interface=interface,
2546
use_ipv6=use_ipv6,
2547
socketfd=socketfd)
2548
1579
2549
def server_activate(self):
1580
2550
if self.enabled:
1581
2551
return socketserver.TCPServer.server_activate(self)
2552
1582
2553
def enable(self):
1583
2554
self.enabled = True
1584
def add_pipe(self, parent_pipe):
2555
2556
def add_pipe(self, parent_pipe, proc):
1585
2557
# Call "handle_ipc" for both data and EOF events
1586
gobject.io_add_watch(parent_pipe.fileno(),
1587
gobject.IO_IN | gobject.IO_HUP,
1588
functools.partial(self.handle_ipc,
1589
parent_pipe = parent_pipe))
1590
1591
def handle_ipc(self, source, condition, parent_pipe=None,
2558
GLib.io_add_watch(
2559
parent_pipe.fileno(),
2560
GLib.IO_IN | GLib.IO_HUP,
2561
functools.partial(self.handle_ipc,
2562
parent_pipe=parent_pipe,
2563
proc=proc))
2564
2565
def handle_ipc(self, source, condition,
2566
parent_pipe=None,
2567
proc=None,
1592
2568
client_object=None):
1593
condition_names = {
1594
gobject.IO_IN: "IN", # There is data to read.
1595
gobject.IO_OUT: "OUT", # Data can be written (without
1596
# blocking).
1597
gobject.IO_PRI: "PRI", # There is urgent data to read.
1598
gobject.IO_ERR: "ERR", # Error condition.
1599
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1600
# broken, usually for pipes and
1601
# sockets).
1602
}
1603
conditions_string = ' | '.join(name
1604
for cond, name in
1605
condition_names.iteritems()
1606
if cond & condition)
1607
# error or the other end of multiprocessing.Pipe has closed
1608
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
2569
# error, or the other end of multiprocessing.Pipe has closed
2570
if condition & (GLib.IO_ERR | GLib.IO_HUP):
2571
# Wait for other process to exit
2572
proc.join()
1609
2573
return False
1610
2574
1611
2575
# Read a request from the child
1612
2576
request = parent_pipe.recv()
1613
2577
command = request[0]
1614
2578
1615
2579
if command == 'init':
1616
2580
fpr = request[1]
1617
2581
address = request[2]
1618
1619
for c in self.clients:
2582
2583
for c in self.clients.values():
1620
2584
if c.fingerprint == fpr:
1621
2585
client = c
1622
2586
break
1625
2589
"dress: %s", fpr, address)
1626
2590
if self.use_dbus:
1627
2591
# Emit D-Bus signal
1628
mandos_dbus_service.ClientNotFound(fpr, address[0])
2592
mandos_dbus_service.ClientNotFound(fpr,
2593
address[0])
1629
2594
parent_pipe.send(False)
1630
2595
return False
1631
1632
gobject.io_add_watch(parent_pipe.fileno(),
1633
gobject.IO_IN | gobject.IO_HUP,
1634
functools.partial(self.handle_ipc,
1635
parent_pipe = parent_pipe,
1636
client_object = client))
2596
2597
GLib.io_add_watch(
2598
parent_pipe.fileno(),
2599
GLib.IO_IN | GLib.IO_HUP,
2600
functools.partial(self.handle_ipc,
2601
parent_pipe=parent_pipe,
2602
proc=proc,
2603
client_object=client))
1637
2604
parent_pipe.send(True)
1638
# remove the old hook in favor of the new above hook on same fileno
2605
# remove the old hook in favor of the new above hook on
2606
# same fileno
1639
2607
return False
1640
2608
if command == 'funcall':
1641
2609
funcname = request[1]
1642
2610
args = request[2]
1643
2611
kwargs = request[3]
1644
1645
parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))
2612
2613
parent_pipe.send(('data', getattr(client_object,
2614
funcname)(*args,
2615
**kwargs)))
1646
2616
1647
2617
if command == 'getattr':
1648
2618
attrname = request[1]
1649
if callable(client_object.__getattribute__(attrname)):
1650
parent_pipe.send(('function',))
2619
if isinstance(client_object.__getattribute__(attrname),
2620
collections.Callable):
2621
parent_pipe.send(('function', ))
1651
2622
else:
1652
parent_pipe.send(('data', client_object.__getattribute__(attrname)))
1653
2623
parent_pipe.send((
2624
'data', client_object.__getattribute__(attrname)))
2625
1654
2626
if command == 'setattr':
1655
2627
attrname = request[1]
1656
2628
value = request[2]
1659
2631
return True
1660
2632
1661
2633
2634
def rfc3339_duration_to_delta(duration):
2635
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2636
2637
>>> rfc3339_duration_to_delta("P7D")
2638
datetime.timedelta(7)
2639
>>> rfc3339_duration_to_delta("PT60S")
2640
datetime.timedelta(0, 60)
2641
>>> rfc3339_duration_to_delta("PT60M")
2642
datetime.timedelta(0, 3600)
2643
>>> rfc3339_duration_to_delta("PT24H")
2644
datetime.timedelta(1)
2645
>>> rfc3339_duration_to_delta("P1W")
2646
datetime.timedelta(7)
2647
>>> rfc3339_duration_to_delta("PT5M30S")
2648
datetime.timedelta(0, 330)
2649
>>> rfc3339_duration_to_delta("P1DT3M20S")
2650
datetime.timedelta(1, 200)
2651
"""
2652
2653
# Parsing an RFC 3339 duration with regular expressions is not
2654
# possible - there would have to be multiple places for the same
2655
# values, like seconds. The current code, while more esoteric, is
2656
# cleaner without depending on a parsing library. If Python had a
2657
# built-in library for parsing we would use it, but we'd like to
2658
# avoid excessive use of external libraries.
2659
2660
# New type for defining tokens, syntax, and semantics all-in-one
2661
Token = collections.namedtuple("Token", (
2662
"regexp", # To match token; if "value" is not None, must have
2663
# a "group" containing digits
2664
"value", # datetime.timedelta or None
2665
"followers")) # Tokens valid after this token
2666
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2667
# the "duration" ABNF definition in RFC 3339, Appendix A.
2668
token_end = Token(re.compile(r"$"), None, frozenset())
2669
token_second = Token(re.compile(r"(\d+)S"),
2670
datetime.timedelta(seconds=1),
2671
frozenset((token_end, )))
2672
token_minute = Token(re.compile(r"(\d+)M"),
2673
datetime.timedelta(minutes=1),
2674
frozenset((token_second, token_end)))
2675
token_hour = Token(re.compile(r"(\d+)H"),
2676
datetime.timedelta(hours=1),
2677
frozenset((token_minute, token_end)))
2678
token_time = Token(re.compile(r"T"),
2679
None,
2680
frozenset((token_hour, token_minute,
2681
token_second)))
2682
token_day = Token(re.compile(r"(\d+)D"),
2683
datetime.timedelta(days=1),
2684
frozenset((token_time, token_end)))
2685
token_month = Token(re.compile(r"(\d+)M"),
2686
datetime.timedelta(weeks=4),
2687
frozenset((token_day, token_end)))
2688
token_year = Token(re.compile(r"(\d+)Y"),
2689
datetime.timedelta(weeks=52),
2690
frozenset((token_month, token_end)))
2691
token_week = Token(re.compile(r"(\d+)W"),
2692
datetime.timedelta(weeks=1),
2693
frozenset((token_end, )))
2694
token_duration = Token(re.compile(r"P"), None,
2695
frozenset((token_year, token_month,
2696
token_day, token_time,
2697
token_week)))
2698
# Define starting values:
2699
# Value so far
2700
value = datetime.timedelta()
2701
found_token = None
2702
# Following valid tokens
2703
followers = frozenset((token_duration, ))
2704
# String left to parse
2705
s = duration
2706
# Loop until end token is found
2707
while found_token is not token_end:
2708
# Search for any currently valid tokens
2709
for token in followers:
2710
match = token.regexp.match(s)
2711
if match is not None:
2712
# Token found
2713
if token.value is not None:
2714
# Value found, parse digits
2715
factor = int(match.group(1), 10)
2716
# Add to value so far
2717
value += factor * token.value
2718
# Strip token from string
2719
s = token.regexp.sub("", s, 1)
2720
# Go to found token
2721
found_token = token
2722
# Set valid next tokens
2723
followers = found_token.followers
2724
break
2725
else:
2726
# No currently valid tokens were found
2727
raise ValueError("Invalid RFC 3339 duration: {!r}"
2728
.format(duration))
2729
# End token found
2730
return value
2731
2732
1662
2733
def string_to_delta(interval):
1663
2734
"""Parse a string and return a datetime.timedelta
1664
2735
1665
2736
>>> string_to_delta('7d')
1666
2737
datetime.timedelta(7)
1667
2738
>>> string_to_delta('60s')
1675
2746
>>> string_to_delta('5m 30s')
1676
2747
datetime.timedelta(0, 330)
1677
2748
"""
2749
2750
try:
2751
return rfc3339_duration_to_delta(interval)
2752
except ValueError:
2753
pass
2754
1678
2755
timevalue = datetime.timedelta(0)
1679
2756
for s in interval.split():
1680
2757
try:
1681
suffix = unicode(s[-1])
2758
suffix = s[-1]
1682
2759
value = int(s[:-1])
1683
2760
if suffix == "d":
1684
2761
delta = datetime.timedelta(value)
1691
2768
elif suffix == "w":
1692
2769
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1693
2770
else:
1694
raise ValueError("Unknown suffix %r" % suffix)
1695
except (ValueError, IndexError) as e:
2771
raise ValueError("Unknown suffix {!r}".format(suffix))
2772
except IndexError as e:
1696
2773
raise ValueError(*(e.args))
1697
2774
timevalue += delta
1698
2775
return timevalue
1699
2776
1700
2777
1701
def if_nametoindex(interface):
1702
"""Call the C function if_nametoindex(), or equivalent
1703
1704
Note: This function cannot accept a unicode string."""
1705
global if_nametoindex
1706
try:
1707
if_nametoindex = (ctypes.cdll.LoadLibrary
1708
(ctypes.util.find_library("c"))
1709
.if_nametoindex)
1710
except (OSError, AttributeError):
1711
logger.warning("Doing if_nametoindex the hard way")
1712
def if_nametoindex(interface):
1713
"Get an interface index the hard way, i.e. using fcntl()"
1714
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1715
with contextlib.closing(socket.socket()) as s:
1716
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1717
struct.pack(str("16s16x"),
1718
interface))
1719
interface_index = struct.unpack(str("I"),
1720
ifreq[16:20])[0]
1721
return interface_index
1722
return if_nametoindex(interface)
1723
1724
1725
def daemon(nochdir = False, noclose = False):
2778
def daemon(nochdir=False, noclose=False):
1726
2779
"""See daemon(3). Standard BSD Unix function.
1727
2780
1728
2781
This should really exist as os.daemon, but it doesn't (yet)."""
1729
2782
if os.fork():
1730
2783
sys.exit()
1735
2788
sys.exit()
1736
2789
if not noclose:
1737
2790
# Close all standard open file descriptors
1738
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2791
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1739
2792
if not stat.S_ISCHR(os.fstat(null).st_mode):
1740
2793
raise OSError(errno.ENODEV,
1741
"%s not a character device"
1742
% os.path.devnull)
2794
"{} not a character device"
2795
.format(os.devnull))
1743
2796
os.dup2(null, sys.stdin.fileno())
1744
2797
os.dup2(null, sys.stdout.fileno())
1745
2798
os.dup2(null, sys.stderr.fileno())
1748
2801
1749
2802
1750
2803
def main():
1751
2804
1752
2805
##################################################################
1753
2806
# Parsing of options, both command line and config file
1754
2807
1755
2808
parser = argparse.ArgumentParser()
1756
2809
parser.add_argument("-v", "--version", action="version",
1757
version = "%%(prog)s %s" % version,
2810
version="%(prog)s {}".format(version),
1758
2811
help="show version number and exit")
1759
2812
parser.add_argument("-i", "--interface", metavar="IF",
1760
2813
help="Bind to interface IF")
1766
2819
help="Run self-test")
1767
2820
parser.add_argument("--debug", action="store_true",
1768
2821
help="Debug mode; run in foreground and log"
1769
" to terminal")
2822
" to terminal", default=None)
1770
2823
parser.add_argument("--debuglevel", metavar="LEVEL",
1771
2824
help="Debug level for stdout output")
1772
2825
parser.add_argument("--priority", help="GnuTLS"
1779
2832
" files")
1780
2833
parser.add_argument("--no-dbus", action="store_false",
1781
2834
dest="use_dbus", help="Do not provide D-Bus"
1782
" system bus interface")
2835
" system bus interface", default=None)
1783
2836
parser.add_argument("--no-ipv6", action="store_false",
1784
dest="use_ipv6", help="Do not use IPv6")
2837
dest="use_ipv6", help="Do not use IPv6",
2838
default=None)
2839
parser.add_argument("--no-restore", action="store_false",
2840
dest="restore", help="Do not restore stored"
2841
" state", default=None)
2842
parser.add_argument("--socket", type=int,
2843
help="Specify a file descriptor to a network"
2844
" socket to use instead of creating one")
2845
parser.add_argument("--statedir", metavar="DIR",
2846
help="Directory to save/restore state in")
2847
parser.add_argument("--foreground", action="store_true",
2848
help="Run in foreground", default=None)
2849
parser.add_argument("--no-zeroconf", action="store_false",
2850
dest="zeroconf", help="Do not use Zeroconf",
2851
default=None)
2852
1785
2853
options = parser.parse_args()
1786
2854
1787
2855
if options.check:
1788
2856
import doctest
1789
doctest.testmod()
1790
sys.exit()
1791
2857
fail_count, test_count = doctest.testmod()
2858
sys.exit(os.EX_OK if fail_count == 0 else 1)
2859
1792
2860
# Default values for config file for server-global settings
1793
server_defaults = { "interface": "",
1794
"address": "",
1795
"port": "",
1796
"debug": "False",
1797
"priority":
1798
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1799
"servicename": "Mandos",
1800
"use_dbus": "True",
1801
"use_ipv6": "True",
1802
"debuglevel": "",
1803
}
1804
2861
server_defaults = {"interface": "",
2862
"address": "",
2863
"port": "",
2864
"debug": "False",
2865
"priority":
2866
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2867
":+SIGN-DSA-SHA256",
2868
"servicename": "Mandos",
2869
"use_dbus": "True",
2870
"use_ipv6": "True",
2871
"debuglevel": "",
2872
"restore": "True",
2873
"socket": "",
2874
"statedir": "/var/lib/mandos",
2875
"foreground": "False",
2876
"zeroconf": "True",
2877
}
2878
1805
2879
# Parse config file for server-global settings
1806
2880
server_config = configparser.SafeConfigParser(server_defaults)
1807
2881
del server_defaults
1808
server_config.read(os.path.join(options.configdir,
1809
"mandos.conf"))
2882
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1810
2883
# Convert the SafeConfigParser object to a dict
1811
2884
server_settings = server_config.defaults()
1812
2885
# Use the appropriate methods on the non-string config options
1813
for option in ("debug", "use_dbus", "use_ipv6"):
2886
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
1814
2887
server_settings[option] = server_config.getboolean("DEFAULT",
1815
2888
option)
1816
2889
if server_settings["port"]:
1817
2890
server_settings["port"] = server_config.getint("DEFAULT",
1818
2891
"port")
2892
if server_settings["socket"]:
2893
server_settings["socket"] = server_config.getint("DEFAULT",
2894
"socket")
2895
# Later, stdin will, and stdout and stderr might, be dup'ed
2896
# over with an opened os.devnull. But we don't want this to
2897
# happen with a supplied network socket.
2898
if 0 <= server_settings["socket"] <= 2:
2899
server_settings["socket"] = os.dup(server_settings
2900
["socket"])
1819
2901
del server_config
1820
2902
1821
2903
# Override the settings from the config file with command line
1822
2904
# options, if set.
1823
2905
for option in ("interface", "address", "port", "debug",
1824
"priority", "servicename", "configdir",
1825
"use_dbus", "use_ipv6", "debuglevel"):
2906
"priority", "servicename", "configdir", "use_dbus",
2907
"use_ipv6", "debuglevel", "restore", "statedir",
2908
"socket", "foreground", "zeroconf"):
1826
2909
value = getattr(options, option)
1827
2910
if value is not None:
1828
2911
server_settings[option] = value
1829
2912
del options
1830
2913
# Force all strings to be unicode
1831
2914
for option in server_settings.keys():
1832
if type(server_settings[option]) is str:
1833
server_settings[option] = unicode(server_settings[option])
2915
if isinstance(server_settings[option], bytes):
2916
server_settings[option] = (server_settings[option]
2917
.decode("utf-8"))
2918
# Force all boolean options to be boolean
2919
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2920
"foreground", "zeroconf"):
2921
server_settings[option] = bool(server_settings[option])
2922
# Debug implies foreground
2923
if server_settings["debug"]:
2924
server_settings["foreground"] = True
1834
2925
# Now we have our good server settings in "server_settings"
1835
2926
1836
2927
##################################################################
1837
2928
2929
if (not server_settings["zeroconf"]
2930
and not (server_settings["port"]
2931
or server_settings["socket"] != "")):
2932
parser.error("Needs port or socket to work without Zeroconf")
2933
1838
2934
# For convenience
1839
2935
debug = server_settings["debug"]
1840
2936
debuglevel = server_settings["debuglevel"]
1841
2937
use_dbus = server_settings["use_dbus"]
1842
2938
use_ipv6 = server_settings["use_ipv6"]
2939
stored_state_path = os.path.join(server_settings["statedir"],
2940
stored_state_file)
2941
foreground = server_settings["foreground"]
2942
zeroconf = server_settings["zeroconf"]
2943
2944
if debug:
2945
initlogger(debug, logging.DEBUG)
2946
else:
2947
if not debuglevel:
2948
initlogger(debug)
2949
else:
2950
level = getattr(logging, debuglevel.upper())
2951
initlogger(debug, level)
1843
2952
1844
2953
if server_settings["servicename"] != "Mandos":
1845
syslogger.setFormatter(logging.Formatter
1846
('Mandos (%s) [%%(process)d]:'
1847
' %%(levelname)s: %%(message)s'
1848
% server_settings["servicename"]))
1849
2954
syslogger.setFormatter(
2955
logging.Formatter('Mandos ({}) [%(process)d]:'
2956
' %(levelname)s: %(message)s'.format(
2957
server_settings["servicename"])))
2958
1850
2959
# Parse config file with clients
1851
client_defaults = { "timeout": "5m",
1852
"extended_timeout": "15m",
1853
"interval": "2m",
1854
"checker": "fping -q -- %%(host)s",
1855
"host": "",
1856
"approval_delay": "0s",
1857
"approval_duration": "1s",
1858
}
1859
client_config = configparser.SafeConfigParser(client_defaults)
2960
client_config = configparser.SafeConfigParser(Client
2961
.client_defaults)
1860
2962
client_config.read(os.path.join(server_settings["configdir"],
1861
2963
"clients.conf"))
1862
2964
1863
2965
global mandos_dbus_service
1864
2966
mandos_dbus_service = None
1865
1866
tcp_server = MandosServer((server_settings["address"],
1867
server_settings["port"]),
1868
ClientHandler,
1869
interface=(server_settings["interface"]
1870
or None),
1871
use_ipv6=use_ipv6,
1872
gnutls_priority=
1873
server_settings["priority"],
1874
use_dbus=use_dbus)
1875
if not debug:
1876
pidfilename = "/var/run/mandos.pid"
1877
try:
1878
pidfile = open(pidfilename, "w")
1879
except IOError:
1880
logger.error("Could not open file %r", pidfilename)
1881
1882
try:
1883
uid = pwd.getpwnam("_mandos").pw_uid
1884
gid = pwd.getpwnam("_mandos").pw_gid
1885
except KeyError:
1886
try:
1887
uid = pwd.getpwnam("mandos").pw_uid
1888
gid = pwd.getpwnam("mandos").pw_gid
2967
2968
socketfd = None
2969
if server_settings["socket"] != "":
2970
socketfd = server_settings["socket"]
2971
tcp_server = MandosServer(
2972
(server_settings["address"], server_settings["port"]),
2973
ClientHandler,
2974
interface=(server_settings["interface"] or None),
2975
use_ipv6=use_ipv6,
2976
gnutls_priority=server_settings["priority"],
2977
use_dbus=use_dbus,
2978
socketfd=socketfd)
2979
if not foreground:
2980
pidfilename = "/run/mandos.pid"
2981
if not os.path.isdir("/run/."):
2982
pidfilename = "/var/run/mandos.pid"
2983
pidfile = None
2984
try:
2985
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
2986
except IOError as e:
2987
logger.error("Could not open file %r", pidfilename,
2988
exc_info=e)
2989
2990
for name, group in (("_mandos", "_mandos"),
2991
("mandos", "mandos"),
2992
("nobody", "nogroup")):
2993
try:
2994
uid = pwd.getpwnam(name).pw_uid
2995
gid = pwd.getpwnam(group).pw_gid
2996
break
1889
2997
except KeyError:
1890
try:
1891
uid = pwd.getpwnam("nobody").pw_uid
1892
gid = pwd.getpwnam("nobody").pw_gid
1893
except KeyError:
1894
uid = 65534
1895
gid = 65534
2998
continue
2999
else:
3000
uid = 65534
3001
gid = 65534
1896
3002
try:
1897
3003
os.setgid(gid)
1898
3004
os.setuid(uid)
3005
if debug:
3006
logger.debug("Did setuid/setgid to {}:{}".format(uid,
3007
gid))
1899
3008
except OSError as error:
1900
if error[0] != errno.EPERM:
1901
raise error
1902
1903
if not debug and not debuglevel:
1904
syslogger.setLevel(logging.WARNING)
1905
console.setLevel(logging.WARNING)
1906
if debuglevel:
1907
level = getattr(logging, debuglevel.upper())
1908
syslogger.setLevel(level)
1909
console.setLevel(level)
3009
logger.warning("Failed to setuid/setgid to {}:{}: {}"
3010
.format(uid, gid, os.strerror(error.errno)))
3011
if error.errno != errno.EPERM:
3012
raise
1910
3013
1911
3014
if debug:
1912
3015
# Enable all possible GnuTLS debugging
1913
3016
1914
3017
# "Use a log level over 10 to enable all debugging options."
1915
3018
# - GnuTLS manual
1916
gnutls.library.functions.gnutls_global_set_log_level(11)
1917
1918
@gnutls.library.types.gnutls_log_func
3019
gnutls.global_set_log_level(11)
3020
3021
@gnutls.log_func
1919
3022
def debug_gnutls(level, string):
1920
3023
logger.debug("GnuTLS: %s", string[:-1])
1921
1922
(gnutls.library.functions
1923
.gnutls_global_set_log_function(debug_gnutls))
1924
3024
3025
gnutls.global_set_log_function(debug_gnutls)
3026
1925
3027
# Redirect stdin so all checkers get /dev/null
1926
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
3028
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1927
3029
os.dup2(null, sys.stdin.fileno())
1928
3030
if null > 2:
1929
3031
os.close(null)
1930
else:
1931
# No console logging
1932
logger.removeHandler(console)
1933
3032
1934
3033
# Need to fork before connecting to D-Bus
1935
if not debug:
3034
if not foreground:
1936
3035
# Close all input and output, do double fork, etc.
1937
3036
daemon()
1938
3037
3038
# multiprocessing will use threads, so before we use GLib we need
3039
# to inform GLib that threads will be used.
3040
GLib.threads_init()
3041
1939
3042
global main_loop
1940
3043
# From the Avahi example code
1941
DBusGMainLoop(set_as_default=True )
1942
main_loop = gobject.MainLoop()
3044
DBusGMainLoop(set_as_default=True)
3045
main_loop = GLib.MainLoop()
1943
3046
bus = dbus.SystemBus()
1944
3047
# End of Avahi example code
1945
3048
if use_dbus:
1946
3049
try:
1947
bus_name = dbus.service.BusName("se.bsnet.fukt.Mandos",
1948
bus, do_not_queue=True)
1949
except dbus.exceptions.NameExistsException as e:
1950
logger.error(unicode(e) + ", disabling D-Bus")
3050
bus_name = dbus.service.BusName("se.recompile.Mandos",
3051
bus,
3052
do_not_queue=True)
3053
old_bus_name = dbus.service.BusName(
3054
"se.bsnet.fukt.Mandos", bus,
3055
do_not_queue=True)
3056
except dbus.exceptions.DBusException as e:
3057
logger.error("Disabling D-Bus:", exc_info=e)
1951
3058
use_dbus = False
1952
3059
server_settings["use_dbus"] = False
1953
3060
tcp_server.use_dbus = False
1954
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1955
service = AvahiService(name = server_settings["servicename"],
1956
servicetype = "_mandos._tcp",
1957
protocol = protocol, bus = bus)
1958
if server_settings["interface"]:
1959
service.interface = (if_nametoindex
1960
(str(server_settings["interface"])))
1961
3061
if zeroconf:
3062
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3063
service = AvahiServiceToSyslog(
3064
name=server_settings["servicename"],
3065
servicetype="_mandos._tcp",
3066
protocol=protocol,
3067
bus=bus)
3068
if server_settings["interface"]:
3069
service.interface = if_nametoindex(
3070
server_settings["interface"].encode("utf-8"))
3071
1962
3072
global multiprocessing_manager
1963
3073
multiprocessing_manager = multiprocessing.Manager()
1964
3074
1965
3075
client_class = Client
1966
3076
if use_dbus:
1967
client_class = functools.partial(ClientDBus, bus = bus)
1968
def client_config_items(config, section):
1969
special_settings = {
1970
"approved_by_default":
1971
lambda: config.getboolean(section,
1972
"approved_by_default"),
1973
}
1974
for name, value in config.items(section):
3077
client_class = functools.partial(ClientDBus, bus=bus)
3078
3079
client_settings = Client.config_parser(client_config)
3080
old_client_settings = {}
3081
clients_data = {}
3082
3083
# This is used to redirect stdout and stderr for checker processes
3084
global wnull
3085
wnull = open(os.devnull, "w") # A writable /dev/null
3086
# Only used if server is running in foreground but not in debug
3087
# mode
3088
if debug or not foreground:
3089
wnull.close()
3090
3091
# Get client data and settings from last running state.
3092
if server_settings["restore"]:
3093
try:
3094
with open(stored_state_path, "rb") as stored_state:
3095
if sys.version_info.major == 2:
3096
clients_data, old_client_settings = pickle.load(
3097
stored_state)
3098
else:
3099
bytes_clients_data, bytes_old_client_settings = (
3100
pickle.load(stored_state, encoding="bytes"))
3101
# Fix bytes to strings
3102
# clients_data
3103
# .keys()
3104
clients_data = {(key.decode("utf-8")
3105
if isinstance(key, bytes)
3106
else key): value
3107
for key, value in
3108
bytes_clients_data.items()}
3109
del bytes_clients_data
3110
for key in clients_data:
3111
value = {(k.decode("utf-8")
3112
if isinstance(k, bytes) else k): v
3113
for k, v in
3114
clients_data[key].items()}
3115
clients_data[key] = value
3116
# .client_structure
3117
value["client_structure"] = [
3118
(s.decode("utf-8")
3119
if isinstance(s, bytes)
3120
else s) for s in
3121
value["client_structure"]]
3122
# .name & .host
3123
for k in ("name", "host"):
3124
if isinstance(value[k], bytes):
3125
value[k] = value[k].decode("utf-8")
3126
# old_client_settings
3127
# .keys()
3128
old_client_settings = {
3129
(key.decode("utf-8")
3130
if isinstance(key, bytes)
3131
else key): value
3132
for key, value in
3133
bytes_old_client_settings.items()}
3134
del bytes_old_client_settings
3135
# .host
3136
for value in old_client_settings.values():
3137
if isinstance(value["host"], bytes):
3138
value["host"] = (value["host"]
3139
.decode("utf-8"))
3140
os.remove(stored_state_path)
3141
except IOError as e:
3142
if e.errno == errno.ENOENT:
3143
logger.warning("Could not load persistent state:"
3144
" {}".format(os.strerror(e.errno)))
3145
else:
3146
logger.critical("Could not load persistent state:",
3147
exc_info=e)
3148
raise
3149
except EOFError as e:
3150
logger.warning("Could not load persistent state: "
3151
"EOFError:",
3152
exc_info=e)
3153
3154
with PGPEngine() as pgp:
3155
for client_name, client in clients_data.items():
3156
# Skip removed clients
3157
if client_name not in client_settings:
3158
continue
3159
3160
# Decide which value to use after restoring saved state.
3161
# We have three different values: Old config file,
3162
# new config file, and saved state.
3163
# New config value takes precedence if it differs from old
3164
# config value, otherwise use saved state.
3165
for name, value in client_settings[client_name].items():
3166
try:
3167
# For each value in new config, check if it
3168
# differs from the old config value (Except for
3169
# the "secret" attribute)
3170
if (name != "secret"
3171
and (value !=
3172
old_client_settings[client_name][name])):
3173
client[name] = value
3174
except KeyError:
3175
pass
3176
3177
# Clients who has passed its expire date can still be
3178
# enabled if its last checker was successful. A Client
3179
# whose checker succeeded before we stored its state is
3180
# assumed to have successfully run all checkers during
3181
# downtime.
3182
if client["enabled"]:
3183
if datetime.datetime.utcnow() >= client["expires"]:
3184
if not client["last_checked_ok"]:
3185
logger.warning(
3186
"disabling client {} - Client never "
3187
"performed a successful checker".format(
3188
client_name))
3189
client["enabled"] = False
3190
elif client["last_checker_status"] != 0:
3191
logger.warning(
3192
"disabling client {} - Client last"
3193
" checker failed with error code"
3194
" {}".format(
3195
client_name,
3196
client["last_checker_status"]))
3197
client["enabled"] = False
3198
else:
3199
client["expires"] = (
3200
datetime.datetime.utcnow()
3201
+ client["timeout"])
3202
logger.debug("Last checker succeeded,"
3203
" keeping {} enabled".format(
3204
client_name))
1975
3205
try:
1976
yield (name, special_settings[name]())
1977
except KeyError:
1978
yield (name, value)
1979
1980
tcp_server.clients.update(set(
1981
client_class(name = section,
1982
config= dict(client_config_items(
1983
client_config, section)))
1984
for section in client_config.sections()))
3206
client["secret"] = pgp.decrypt(
3207
client["encrypted_secret"],
3208
client_settings[client_name]["secret"])
3209
except PGPError:
3210
# If decryption fails, we use secret from new settings
3211
logger.debug("Failed to decrypt {} old secret".format(
3212
client_name))
3213
client["secret"] = (client_settings[client_name]
3214
["secret"])
3215
3216
# Add/remove clients based on new changes made to config
3217
for client_name in (set(old_client_settings)
3218
- set(client_settings)):
3219
del clients_data[client_name]
3220
for client_name in (set(client_settings)
3221
- set(old_client_settings)):
3222
clients_data[client_name] = client_settings[client_name]
3223
3224
# Create all client objects
3225
for client_name, client in clients_data.items():
3226
tcp_server.clients[client_name] = client_class(
3227
name=client_name,
3228
settings=client,
3229
server_settings=server_settings)
3230
1985
3231
if not tcp_server.clients:
1986
3232
logger.warning("No clients defined")
1987
1988
if not debug:
1989
try:
1990
with pidfile:
1991
pid = os.getpid()
1992
pidfile.write(str(pid) + "\n".encode("utf-8"))
1993
del pidfile
1994
except IOError:
1995
logger.error("Could not write to file %r with PID %d",
1996
pidfilename, pid)
1997
except NameError:
1998
# "pidfile" was never created
1999
pass
3233
3234
if not foreground:
3235
if pidfile is not None:
3236
pid = os.getpid()
3237
try:
3238
with pidfile:
3239
print(pid, file=pidfile)
3240
except IOError:
3241
logger.error("Could not write to file %r with PID %d",
3242
pidfilename, pid)
3243
del pidfile
2000
3244
del pidfilename
2001
2002
signal.signal(signal.SIGINT, signal.SIG_IGN)
2003
2004
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2005
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2006
3245
3246
for termsig in (signal.SIGHUP, signal.SIGTERM):
3247
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3248
lambda: main_loop.quit() and False)
3249
2007
3250
if use_dbus:
2008
class MandosDBusService(dbus.service.Object):
3251
3252
@alternate_dbus_interfaces(
3253
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3254
class MandosDBusService(DBusObjectWithObjectManager):
2009
3255
"""A D-Bus proxy object"""
3256
2010
3257
def __init__(self):
2011
3258
dbus.service.Object.__init__(self, bus, "/")
2012
_interface = "se.bsnet.fukt.Mandos"
2013
3259
3260
_interface = "se.recompile.Mandos"
3261
2014
3262
@dbus.service.signal(_interface, signature="o")
2015
3263
def ClientAdded(self, objpath):
2016
3264
"D-Bus signal"
2017
3265
pass
2018
3266
2019
3267
@dbus.service.signal(_interface, signature="ss")
2020
3268
def ClientNotFound(self, fingerprint, address):
2021
3269
"D-Bus signal"
2022
3270
pass
2023
3271
3272
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3273
"true"})
2024
3274
@dbus.service.signal(_interface, signature="os")
2025
3275
def ClientRemoved(self, objpath, name):
2026
3276
"D-Bus signal"
2027
3277
pass
2028
3278
3279
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3280
"true"})
2029
3281
@dbus.service.method(_interface, out_signature="ao")
2030
3282
def GetAllClients(self):
2031
3283
"D-Bus method"
2032
return dbus.Array(c.dbus_object_path
2033
for c in tcp_server.clients)
2034
3284
return dbus.Array(c.dbus_object_path for c in
3285
tcp_server.clients.values())
3286
3287
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3288
"true"})
2035
3289
@dbus.service.method(_interface,
2036
3290
out_signature="a{oa{sv}}")
2037
3291
def GetAllClientsWithProperties(self):
2038
3292
"D-Bus method"
2039
3293
return dbus.Dictionary(
2040
((c.dbus_object_path, c.GetAll(""))
2041
for c in tcp_server.clients),
3294
{c.dbus_object_path: c.GetAll(
3295
"se.recompile.Mandos.Client")
3296
for c in tcp_server.clients.values()},
2042
3297
signature="oa{sv}")
2043
3298
2044
3299
@dbus.service.method(_interface, in_signature="o")
2045
3300
def RemoveClient(self, object_path):
2046
3301
"D-Bus method"
2047
for c in tcp_server.clients:
3302
for c in tcp_server.clients.values():
2048
3303
if c.dbus_object_path == object_path:
2049
tcp_server.clients.remove(c)
3304
del tcp_server.clients[c.name]
2050
3305
c.remove_from_connection()
2051
# Don't signal anything except ClientRemoved
3306
# Don't signal the disabling
2052
3307
c.disable(quiet=True)
2053
# Emit D-Bus signal
2054
self.ClientRemoved(object_path, c.name)
3308
# Emit D-Bus signal for removal
3309
self.client_removed_signal(c)
2055
3310
return
2056
3311
raise KeyError(object_path)
2057
3312
2058
3313
del _interface
2059
3314
3315
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3316
out_signature="a{oa{sa{sv}}}")
3317
def GetManagedObjects(self):
3318
"""D-Bus method"""
3319
return dbus.Dictionary(
3320
{client.dbus_object_path:
3321
dbus.Dictionary(
3322
{interface: client.GetAll(interface)
3323
for interface in
3324
client._get_all_interface_names()})
3325
for client in tcp_server.clients.values()})
3326
3327
def client_added_signal(self, client):
3328
"""Send the new standard signal and the old signal"""
3329
if use_dbus:
3330
# New standard signal
3331
self.InterfacesAdded(
3332
client.dbus_object_path,
3333
dbus.Dictionary(
3334
{interface: client.GetAll(interface)
3335
for interface in
3336
client._get_all_interface_names()}))
3337
# Old signal
3338
self.ClientAdded(client.dbus_object_path)
3339
3340
def client_removed_signal(self, client):
3341
"""Send the new standard signal and the old signal"""
3342
if use_dbus:
3343
# New standard signal
3344
self.InterfacesRemoved(
3345
client.dbus_object_path,
3346
client._get_all_interface_names())
3347
# Old signal
3348
self.ClientRemoved(client.dbus_object_path,
3349
client.name)
3350
2060
3351
mandos_dbus_service = MandosDBusService()
2061
3352
3353
# Save modules to variables to exempt the modules from being
3354
# unloaded before the function registered with atexit() is run.
3355
mp = multiprocessing
3356
wn = wnull
3357
2062
3358
def cleanup():
2063
3359
"Cleanup function; run on exit"
2064
service.cleanup()
2065
3360
if zeroconf:
3361
service.cleanup()
3362
3363
mp.active_children()
3364
wn.close()
3365
if not (tcp_server.clients or client_settings):
3366
return
3367
3368
# Store client before exiting. Secrets are encrypted with key
3369
# based on what config file has. If config file is
3370
# removed/edited, old secret will thus be unrecovable.
3371
clients = {}
3372
with PGPEngine() as pgp:
3373
for client in tcp_server.clients.values():
3374
key = client_settings[client.name]["secret"]
3375
client.encrypted_secret = pgp.encrypt(client.secret,
3376
key)
3377
client_dict = {}
3378
3379
# A list of attributes that can not be pickled
3380
# + secret.
3381
exclude = {"bus", "changedstate", "secret",
3382
"checker", "server_settings"}
3383
for name, typ in inspect.getmembers(dbus.service
3384
.Object):
3385
exclude.add(name)
3386
3387
client_dict["encrypted_secret"] = (client
3388
.encrypted_secret)
3389
for attr in client.client_structure:
3390
if attr not in exclude:
3391
client_dict[attr] = getattr(client, attr)
3392
3393
clients[client.name] = client_dict
3394
del client_settings[client.name]["secret"]
3395
3396
try:
3397
with tempfile.NamedTemporaryFile(
3398
mode='wb',
3399
suffix=".pickle",
3400
prefix='clients-',
3401
dir=os.path.dirname(stored_state_path),
3402
delete=False) as stored_state:
3403
pickle.dump((clients, client_settings), stored_state,
3404
protocol=2)
3405
tempname = stored_state.name
3406
os.rename(tempname, stored_state_path)
3407
except (IOError, OSError) as e:
3408
if not debug:
3409
try:
3410
os.remove(tempname)
3411
except NameError:
3412
pass
3413
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
3414
logger.warning("Could not save persistent state: {}"
3415
.format(os.strerror(e.errno)))
3416
else:
3417
logger.warning("Could not save persistent state:",
3418
exc_info=e)
3419
raise
3420
3421
# Delete all clients, and settings from config
2066
3422
while tcp_server.clients:
2067
client = tcp_server.clients.pop()
3423
name, client = tcp_server.clients.popitem()
2068
3424
if use_dbus:
2069
3425
client.remove_from_connection()
2070
client.disable_hook = None
2071
# Don't signal anything except ClientRemoved
3426
# Don't signal the disabling
2072
3427
client.disable(quiet=True)
3428
# Emit D-Bus signal for removal
2073
3429
if use_dbus:
2074
# Emit D-Bus signal
2075
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
2076
client.name)
2077
3430
mandos_dbus_service.client_removed_signal(client)
3431
client_settings.clear()
3432
2078
3433
atexit.register(cleanup)
2079
2080
for client in tcp_server.clients:
3434
3435
for client in tcp_server.clients.values():
2081
3436
if use_dbus:
2082
# Emit D-Bus signal
2083
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2084
client.enable()
2085
3437
# Emit D-Bus signal for adding
3438
mandos_dbus_service.client_added_signal(client)
3439
# Need to initiate checking of clients
3440
if client.enabled:
3441
client.init_checker()
3442
2086
3443
tcp_server.enable()
2087
3444
tcp_server.server_activate()
2088
3445
2089
3446
# Find out what port we got
2090
service.port = tcp_server.socket.getsockname()[1]
3447
if zeroconf:
3448
service.port = tcp_server.socket.getsockname()[1]
2091
3449
if use_ipv6:
2092
3450
logger.info("Now listening on address %r, port %d,"
2093
" flowinfo %d, scope_id %d"
2094
% tcp_server.socket.getsockname())
3451
" flowinfo %d, scope_id %d",
3452
*tcp_server.socket.getsockname())
2095
3453
else: # IPv4
2096
logger.info("Now listening on address %r, port %d"
2097
% tcp_server.socket.getsockname())
2098
2099
#service.interface = tcp_server.socket.getsockname()[3]
2100
3454
logger.info("Now listening on address %r, port %d",
3455
*tcp_server.socket.getsockname())
3456
3457
# service.interface = tcp_server.socket.getsockname()[3]
3458
2101
3459
try:
2102
# From the Avahi example code
2103
try:
2104
service.activate()
2105
except dbus.exceptions.DBusException as error:
2106
logger.critical("DBusException: %s", error)
2107
cleanup()
2108
sys.exit(1)
2109
# End of Avahi example code
2110
2111
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2112
lambda *args, **kwargs:
2113
(tcp_server.handle_request
2114
(*args[2:], **kwargs) or True))
2115
3460
if zeroconf:
3461
# From the Avahi example code
3462
try:
3463
service.activate()
3464
except dbus.exceptions.DBusException as error:
3465
logger.critical("D-Bus Exception", exc_info=error)
3466
cleanup()
3467
sys.exit(1)
3468
# End of Avahi example code
3469
3470
GLib.io_add_watch(tcp_server.fileno(), GLib.IO_IN,
3471
lambda *args, **kwargs:
3472
(tcp_server.handle_request
3473
(*args[2:], **kwargs) or True))
3474
2116
3475
logger.debug("Starting main loop")
2117
3476
main_loop.run()
2118
3477
except AvahiError as error:
2119
logger.critical("AvahiError: %s", error)
3478
logger.critical("Avahi Error", exc_info=error)
2120
3479
cleanup()
2121
3480
sys.exit(1)
2122
3481
except KeyboardInterrupt:
2127
3486
# Must run before the D-Bus bus name gets deregistered
2128
3487
cleanup()
2129
3488
3489
2130
3490
if __name__ == '__main__':
2131
3491
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0