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- Committer: Björn Påhlsson
- Date: 2011-10-15 16:48:03 UTC
- Revision ID: belorn@fukt.bsnet.se-20111015164803-61q3hzrv91d042mb
Tags: version-1.4.1-1
* Makefile (version): Changed to "1.4.1".
* NEWS (Version 1.4.1): New entry.
* debian/changelog (1.4.1-1): - '' -
* NEWS (Version 1.4.1): New entry.
* debian/changelog (1.4.1-1): - '' -
- files removed:
- bugs.xml
- debian/upstream
- network-hooks.d
- plugin-helpers
- files modified:
- .bzrignore
added
removed
mandos
1
1
#!/usr/bin/python
2
2
# -*- mode: python; coding: utf-8 -*-
3
#
3
#
4
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# Mandos server - give out binary blobs to connecting clients.
5
#
5
#
6
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# This program is partly derived from an example program for an Avahi
7
7
# service publisher, downloaded from
8
8
# <http://avahi.org/wiki/PythonPublishExample>. This includes the
9
9
# methods "add", "remove", "server_state_changed",
10
10
# "entry_group_state_changed", "cleanup", and "activate" in the
11
11
# "AvahiService" class, and some lines in "main".
12
#
12
#
13
13
# Everything else is
14
# Copyright © 2008-2016 Teddy Hogeborn
15
# Copyright © 2008-2016 Björn Påhlsson
16
#
14
# Copyright © 2008-2011 Teddy Hogeborn
15
# Copyright © 2008-2011 Björn Påhlsson
16
#
17
17
# This program is free software: you can redistribute it and/or modify
18
18
# it under the terms of the GNU General Public License as published by
19
19
# the Free Software Foundation, either version 3 of the License, or
23
23
# but WITHOUT ANY WARRANTY; without even the implied warranty of
24
24
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
25
25
# GNU General Public License for more details.
26
#
26
#
27
27
# You should have received a copy of the GNU General Public License
28
28
# along with this program. If not, see
29
29
# <http://www.gnu.org/licenses/>.
30
#
30
#
31
31
# Contact the authors at <mandos@recompile.se>.
32
#
32
#
33
33
34
34
from __future__ import (division, absolute_import, print_function,
35
35
unicode_literals)
36
36
37
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
37
import SocketServer as socketserver
46
38
import socket
47
39
import argparse
48
40
import datetime
49
41
import errno
50
try:
51
import ConfigParser as configparser
52
except ImportError:
53
import configparser
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
54
49
import sys
55
50
import re
56
51
import os
65
60
import struct
66
61
import fcntl
67
62
import functools
68
try:
69
import cPickle as pickle
70
except ImportError:
71
import pickle
63
import cPickle as pickle
72
64
import multiprocessing
73
65
import types
74
import binascii
75
import tempfile
76
import itertools
77
import collections
78
import codecs
79
66
80
67
import dbus
81
68
import dbus.service
82
from gi.repository import GLib
69
import gobject
70
import avahi
83
71
from dbus.mainloop.glib import DBusGMainLoop
84
72
import ctypes
85
73
import ctypes.util
86
74
import xml.dom.minidom
87
75
import inspect
88
76
89
# Try to find the value of SO_BINDTODEVICE:
90
77
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:
93
78
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
94
79
except AttributeError:
95
80
try:
96
# This is where SO_BINDTODEVICE was up to and including Python
97
# 2.6, and also 3.2:
98
81
from IN import SO_BINDTODEVICE
99
82
except ImportError:
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
83
SO_BINDTODEVICE = None
84
85
86
version = "1.4.1"
87
88
#logger = logging.getLogger('mandos')
89
logger = logging.Logger('mandos')
90
syslogger = (logging.handlers.SysLogHandler
91
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
92
address = str("/dev/log")))
93
syslogger.setFormatter(logging.Formatter
94
('Mandos [%(process)d]: %(levelname)s:'
95
' %(message)s'))
96
logger.addHandler(syslogger)
97
98
console = logging.StreamHandler()
99
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
100
' %(levelname)s:'
101
' %(message)s'))
102
logger.addHandler(console)
302
103
303
104
class AvahiError(Exception):
304
105
def __init__(self, value, *args, **kwargs):
305
106
self.value = value
306
return super(AvahiError, self).__init__(value, *args,
307
**kwargs)
308
107
super(AvahiError, self).__init__(value, *args, **kwargs)
108
def __unicode__(self):
109
return unicode(repr(self.value))
309
110
310
111
class AvahiServiceError(AvahiError):
311
112
pass
312
113
313
314
114
class AvahiGroupError(AvahiError):
315
115
pass
316
116
317
117
318
118
class AvahiService(object):
319
119
"""An Avahi (Zeroconf) service.
320
120
321
121
Attributes:
322
122
interface: integer; avahi.IF_UNSPEC or an interface index.
323
123
Used to optionally bind to the specified interface.
324
124
name: string; Example: 'Mandos'
325
125
type: string; Example: '_mandos._tcp'.
326
See <https://www.iana.org/assignments/service-names-port-numbers>
126
See <http://www.dns-sd.org/ServiceTypes.html>
327
127
port: integer; what port to announce
328
128
TXT: list of strings; TXT record for the service
329
129
domain: string; Domain to publish on, default to .local if empty.
335
135
server: D-Bus Server
336
136
bus: dbus.SystemBus()
337
137
"""
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):
138
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
139
servicetype = None, port = None, TXT = None,
140
domain = "", host = "", max_renames = 32768,
141
protocol = avahi.PROTO_UNSPEC, bus = None):
350
142
self.interface = interface
351
143
self.name = name
352
144
self.type = servicetype
361
153
self.server = None
362
154
self.bus = bus
363
155
self.entry_group_state_changed_match = None
364
365
def rename(self, remove=True):
156
def rename(self):
366
157
"""Derived from the Avahi example code"""
367
158
if self.rename_count >= self.max_renames:
368
159
logger.critical("No suitable Zeroconf service name found"
369
160
" after %i retries, exiting.",
370
161
self.rename_count)
371
162
raise AvahiServiceError("Too many renames")
372
self.name = str(
373
self.server.GetAlternativeServiceName(self.name))
374
self.rename_count += 1
163
self.name = unicode(self.server
164
.GetAlternativeServiceName(self.name))
375
165
logger.info("Changing Zeroconf service name to %r ...",
376
166
self.name)
377
if remove:
378
self.remove()
167
syslogger.setFormatter(logging.Formatter
168
('Mandos (%s) [%%(process)d]:'
169
' %%(levelname)s: %%(message)s'
170
% self.name))
171
self.remove()
379
172
try:
380
173
self.add()
381
174
except dbus.exceptions.DBusException as error:
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
175
logger.critical("DBusException: %s", error)
176
self.cleanup()
177
os._exit(1)
178
self.rename_count += 1
391
179
def remove(self):
392
180
"""Derived from the Avahi example code"""
393
181
if self.entry_group_state_changed_match is not None:
395
183
self.entry_group_state_changed_match = None
396
184
if self.group is not None:
397
185
self.group.Reset()
398
399
186
def add(self):
400
187
"""Derived from the Avahi example code"""
401
188
self.remove()
406
193
avahi.DBUS_INTERFACE_ENTRY_GROUP)
407
194
self.entry_group_state_changed_match = (
408
195
self.group.connect_to_signal(
409
'StateChanged', self.entry_group_state_changed))
196
'StateChanged', self .entry_group_state_changed))
410
197
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
411
198
self.name, self.type)
412
199
self.group.AddService(
418
205
dbus.UInt16(self.port),
419
206
avahi.string_array_to_txt_array(self.TXT))
420
207
self.group.Commit()
421
422
208
def entry_group_state_changed(self, state, error):
423
209
"""Derived from the Avahi example code"""
424
210
logger.debug("Avahi entry group state change: %i", state)
425
211
426
212
if state == avahi.ENTRY_GROUP_ESTABLISHED:
427
213
logger.debug("Zeroconf service established.")
428
214
elif state == avahi.ENTRY_GROUP_COLLISION:
430
216
self.rename()
431
217
elif state == avahi.ENTRY_GROUP_FAILURE:
432
218
logger.critical("Avahi: Error in group state changed %s",
433
str(error))
434
raise AvahiGroupError("State changed: {!s}".format(error))
435
219
unicode(error))
220
raise AvahiGroupError("State changed: %s"
221
% unicode(error))
436
222
def cleanup(self):
437
223
"""Derived from the Avahi example code"""
438
224
if self.group is not None:
439
225
try:
440
226
self.group.Free()
441
227
except (dbus.exceptions.UnknownMethodException,
442
dbus.exceptions.DBusException):
228
dbus.exceptions.DBusException) as e:
443
229
pass
444
230
self.group = None
445
231
self.remove()
446
447
232
def server_state_changed(self, state, error=None):
448
233
"""Derived from the Avahi example code"""
449
234
logger.debug("Avahi server state change: %i", state)
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
}
235
bad_states = { avahi.SERVER_INVALID:
236
"Zeroconf server invalid",
237
avahi.SERVER_REGISTERING: None,
238
avahi.SERVER_COLLISION:
239
"Zeroconf server name collision",
240
avahi.SERVER_FAILURE:
241
"Zeroconf server failure" }
456
242
if state in bad_states:
457
243
if bad_states[state] is not None:
458
244
if error is None:
461
247
logger.error(bad_states[state] + ": %r", error)
462
248
self.cleanup()
463
249
elif state == avahi.SERVER_RUNNING:
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)
250
self.add()
476
251
else:
477
252
if error is None:
478
253
logger.debug("Unknown state: %r", state)
479
254
else:
480
255
logger.debug("Unknown state: %r: %r", state, error)
481
482
256
def activate(self):
483
257
"""Derived from the Avahi example code"""
484
258
if self.server is None:
488
262
follow_name_owner_changes=True),
489
263
avahi.DBUS_INTERFACE_SERVER)
490
264
self.server.connect_to_signal("StateChanged",
491
self.server_state_changed)
265
self.server_state_changed)
492
266
self.server_state_changed(self.server.GetState())
493
267
494
268
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
269
def _timedelta_to_milliseconds(td):
270
"Convert a datetime.timedelta() to milliseconds"
271
return ((td.days * 24 * 60 * 60 * 1000)
272
+ (td.seconds * 1000)
273
+ (td.microseconds // 1000))
274
780
275
class Client(object):
781
276
"""A representation of a client host served by this server.
782
277
783
278
Attributes:
784
approved: bool(); 'None' if not yet approved/disapproved
279
_approved: bool(); 'None' if not yet approved/disapproved
785
280
approval_delay: datetime.timedelta(); Time to wait for approval
786
281
approval_duration: datetime.timedelta(); Duration of one approval
787
282
checker: subprocess.Popen(); a running checker process used
788
283
to see if the client lives.
789
284
'None' if no process is running.
790
checker_callback_tag: a GLib event source tag, or None
285
checker_callback_tag: a gobject event source tag, or None
791
286
checker_command: string; External command which is run to check
792
287
if client lives. %() expansions are done at
793
288
runtime with vars(self) as dict, so that for
794
289
instance %(name)s can be used in the command.
795
checker_initiator_tag: a GLib event source tag, or None
290
checker_initiator_tag: a gobject event source tag, or None
796
291
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
799
292
current_checker_command: string; current running checker_command
800
disable_initiator_tag: a GLib event source tag, or None
293
disable_hook: If set, called by disable() as disable_hook(self)
294
disable_initiator_tag: a gobject event source tag, or None
801
295
enabled: bool()
802
296
fingerprint: string (40 or 32 hexadecimal digits); used to
803
297
uniquely identify the client
805
299
interval: datetime.timedelta(); How often to start a new checker
806
300
last_approval_request: datetime.datetime(); (UTC) or None
807
301
last_checked_ok: datetime.datetime(); (UTC) or None
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
302
last_enabled: datetime.datetime(); (UTC)
814
303
name: string; from the config file, used in log messages and
815
304
D-Bus identifiers
816
305
secret: bytestring; sent verbatim (over TLS) to client
817
306
timeout: datetime.timedelta(); How long from last_checked_ok
818
307
until this client is disabled
819
extended_timeout: extra long timeout when secret has been sent
308
extended_timeout: extra long timeout when password has been sent
820
309
runtime_expansions: Allowed attributes for runtime expansion.
821
310
expires: datetime.datetime(); time (UTC) when a client will be
822
311
disabled, or None
823
server_settings: The server_settings dict from main()
824
312
"""
825
313
826
314
runtime_expansions = ("approval_delay", "approval_duration",
827
"created", "enabled", "expires",
828
"fingerprint", "host", "interval",
829
"last_approval_request", "last_checked_ok",
315
"created", "enabled", "fingerprint",
316
"host", "interval", "last_checked_ok",
830
317
"last_enabled", "name", "timeout")
831
client_defaults = {
832
"timeout": "PT5M",
833
"extended_timeout": "PT15M",
834
"interval": "PT2M",
835
"checker": "fping -q -- %%(host)s",
836
"host": "",
837
"approval_delay": "PT0S",
838
"approval_duration": "PT1S",
839
"approved_by_default": "True",
840
"enabled": "True",
841
}
842
843
@staticmethod
844
def config_parser(config):
845
"""Construct a new dict of client settings of this form:
846
{ client_name: {setting_name: value, ...}, ...}
847
with exceptions for any special settings as defined above.
848
NOTE: Must be a pure function. Must return the same result
849
value given the same arguments.
850
"""
851
settings = {}
852
for client_name in config.sections():
853
section = dict(config.items(client_name))
854
client = settings[client_name] = {}
855
856
client["host"] = section["host"]
857
# Reformat values from string types to Python types
858
client["approved_by_default"] = config.getboolean(
859
client_name, "approved_by_default")
860
client["enabled"] = config.getboolean(client_name,
861
"enabled")
862
863
# Uppercase and remove spaces from fingerprint for later
864
# comparison purposes with return value from the
865
# fingerprint() function
866
client["fingerprint"] = (section["fingerprint"].upper()
867
.replace(" ", ""))
868
if "secret" in section:
869
client["secret"] = codecs.decode(section["secret"]
870
.encode("utf-8"),
871
"base64")
872
elif "secfile" in section:
873
with open(os.path.expanduser(os.path.expandvars
874
(section["secfile"])),
875
"rb") as secfile:
876
client["secret"] = secfile.read()
877
else:
878
raise TypeError("No secret or secfile for section {}"
879
.format(section))
880
client["timeout"] = string_to_delta(section["timeout"])
881
client["extended_timeout"] = string_to_delta(
882
section["extended_timeout"])
883
client["interval"] = string_to_delta(section["interval"])
884
client["approval_delay"] = string_to_delta(
885
section["approval_delay"])
886
client["approval_duration"] = string_to_delta(
887
section["approval_duration"])
888
client["checker_command"] = section["checker"]
889
client["last_approval_request"] = None
890
client["last_checked_ok"] = None
891
client["last_checker_status"] = -2
892
893
return settings
894
895
def __init__(self, settings, name=None, server_settings=None):
318
319
def timeout_milliseconds(self):
320
"Return the 'timeout' attribute in milliseconds"
321
return _timedelta_to_milliseconds(self.timeout)
322
323
def extended_timeout_milliseconds(self):
324
"Return the 'extended_timeout' attribute in milliseconds"
325
return _timedelta_to_milliseconds(self.extended_timeout)
326
327
def interval_milliseconds(self):
328
"Return the 'interval' attribute in milliseconds"
329
return _timedelta_to_milliseconds(self.interval)
330
331
def approval_delay_milliseconds(self):
332
return _timedelta_to_milliseconds(self.approval_delay)
333
334
def __init__(self, name = None, disable_hook=None, config=None):
335
"""Note: the 'checker' key in 'config' sets the
336
'checker_command' attribute and *not* the 'checker'
337
attribute."""
896
338
self.name = name
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
339
if config is None:
340
config = {}
914
341
logger.debug("Creating client %r", self.name)
342
# Uppercase and remove spaces from fingerprint for later
343
# comparison purposes with return value from the fingerprint()
344
# function
345
self.fingerprint = (config["fingerprint"].upper()
346
.replace(" ", ""))
915
347
logger.debug(" Fingerprint: %s", self.fingerprint)
916
self.created = settings.get("created",
917
datetime.datetime.utcnow())
918
919
# attributes specific for this server instance
348
if "secret" in config:
349
self.secret = config["secret"].decode("base64")
350
elif "secfile" in config:
351
with open(os.path.expanduser(os.path.expandvars
352
(config["secfile"])),
353
"rb") as secfile:
354
self.secret = secfile.read()
355
else:
356
raise TypeError("No secret or secfile for client %s"
357
% self.name)
358
self.host = config.get("host", "")
359
self.created = datetime.datetime.utcnow()
360
self.enabled = False
361
self.last_approval_request = None
362
self.last_enabled = None
363
self.last_checked_ok = None
364
self.timeout = string_to_delta(config["timeout"])
365
self.extended_timeout = string_to_delta(config
366
["extended_timeout"])
367
self.interval = string_to_delta(config["interval"])
368
self.disable_hook = disable_hook
920
369
self.checker = None
921
370
self.checker_initiator_tag = None
922
371
self.disable_initiator_tag = None
372
self.expires = None
923
373
self.checker_callback_tag = None
374
self.checker_command = config["checker"]
924
375
self.current_checker_command = None
925
self.approved = None
376
self.last_connect = None
377
self._approved = None
378
self.approved_by_default = config.get("approved_by_default",
379
True)
926
380
self.approvals_pending = 0
927
self.changedstate = multiprocessing_manager.Condition(
928
multiprocessing_manager.Lock())
929
self.client_structure = [attr
930
for attr in self.__dict__.keys()
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
381
self.approval_delay = string_to_delta(
382
config["approval_delay"])
383
self.approval_duration = string_to_delta(
384
config["approval_duration"])
385
self.changedstate = (multiprocessing_manager
386
.Condition(multiprocessing_manager
387
.Lock()))
388
940
389
def send_changedstate(self):
941
with self.changedstate:
942
self.changedstate.notify_all()
943
390
self.changedstate.acquire()
391
self.changedstate.notify_all()
392
self.changedstate.release()
393
944
394
def enable(self):
945
395
"""Start this client's checker and timeout hooks"""
946
396
if getattr(self, "enabled", False):
947
397
# Already enabled
948
398
return
399
self.send_changedstate()
400
# Schedule a new checker to be started an 'interval' from now,
401
# and every interval from then on.
402
self.checker_initiator_tag = (gobject.timeout_add
403
(self.interval_milliseconds(),
404
self.start_checker))
405
# Schedule a disable() when 'timeout' has passed
949
406
self.expires = datetime.datetime.utcnow() + self.timeout
407
self.disable_initiator_tag = (gobject.timeout_add
408
(self.timeout_milliseconds(),
409
self.disable))
950
410
self.enabled = True
951
411
self.last_enabled = datetime.datetime.utcnow()
952
self.init_checker()
953
self.send_changedstate()
954
412
# Also start a new checker *right now*.
413
self.start_checker()
414
955
415
def disable(self, quiet=True):
956
416
"""Disable this client."""
957
417
if not getattr(self, "enabled", False):
958
418
return False
959
419
if not quiet:
420
self.send_changedstate()
421
if not quiet:
960
422
logger.info("Disabling client %s", self.name)
961
if getattr(self, "disable_initiator_tag", None) is not None:
962
GLib.source_remove(self.disable_initiator_tag)
423
if getattr(self, "disable_initiator_tag", False):
424
gobject.source_remove(self.disable_initiator_tag)
963
425
self.disable_initiator_tag = None
964
426
self.expires = None
965
if getattr(self, "checker_initiator_tag", None) is not None:
966
GLib.source_remove(self.checker_initiator_tag)
427
if getattr(self, "checker_initiator_tag", False):
428
gobject.source_remove(self.checker_initiator_tag)
967
429
self.checker_initiator_tag = None
968
430
self.stop_checker()
431
if self.disable_hook:
432
self.disable_hook(self)
969
433
self.enabled = False
970
if not quiet:
971
self.send_changedstate()
972
# Do not run this again if called by a GLib.timeout_add
434
# Do not run this again if called by a gobject.timeout_add
973
435
return False
974
436
975
437
def __del__(self):
438
self.disable_hook = None
976
439
self.disable()
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):
440
441
def checker_callback(self, pid, condition, command):
996
442
"""The checker has completed, so take appropriate actions."""
997
443
self.checker_callback_tag = None
998
444
self.checker = None
999
# Read return code from connection (see call_pipe)
1000
returncode = connection.recv()
1001
connection.close()
1002
1003
if returncode >= 0:
1004
self.last_checker_status = returncode
1005
self.last_checker_signal = None
1006
if self.last_checker_status == 0:
445
if os.WIFEXITED(condition):
446
exitstatus = os.WEXITSTATUS(condition)
447
if exitstatus == 0:
1007
448
logger.info("Checker for %(name)s succeeded",
1008
449
vars(self))
1009
450
self.checked_ok()
1010
451
else:
1011
logger.info("Checker for %(name)s failed", vars(self))
452
logger.info("Checker for %(name)s failed",
453
vars(self))
1012
454
else:
1013
self.last_checker_status = -1
1014
self.last_checker_signal = -returncode
1015
455
logger.warning("Checker for %(name)s crashed?",
1016
456
vars(self))
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."""
457
458
def checked_ok(self, timeout=None):
459
"""Bump up the timeout for this client.
460
461
This should only be called when the client has been seen,
462
alive and well.
463
"""
1028
464
if timeout is None:
1029
465
timeout = self.timeout
466
self.last_checked_ok = datetime.datetime.utcnow()
1030
467
if self.disable_initiator_tag is not None:
1031
GLib.source_remove(self.disable_initiator_tag)
1032
self.disable_initiator_tag = None
468
gobject.source_remove(self.disable_initiator_tag)
1033
469
if getattr(self, "enabled", False):
1034
self.disable_initiator_tag = GLib.timeout_add(
1035
int(timeout.total_seconds() * 1000), self.disable)
470
self.disable_initiator_tag = (gobject.timeout_add
471
(_timedelta_to_milliseconds
472
(timeout), self.disable))
1036
473
self.expires = datetime.datetime.utcnow() + timeout
1037
474
1038
475
def need_approval(self):
1039
476
self.last_approval_request = datetime.datetime.utcnow()
1040
477
1041
478
def start_checker(self):
1042
479
"""Start a new checker subprocess if one is not running.
1043
480
1044
481
If a checker already exists, leave it running and do
1045
482
nothing."""
1046
483
# The reason for not killing a running checker is that if we
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
484
# did that, then if a checker (for some reason) started
485
# running slowly and taking more than 'interval' time, the
486
# client would inevitably timeout, since no checker would get
487
# a chance to run to completion. If we instead leave running
1051
488
# checkers alone, the checker would have to take more time
1052
489
# than 'timeout' for the client to be disabled, which is as it
1053
490
# should be.
1054
1055
if self.checker is not None and not self.checker.is_alive():
1056
logger.warning("Checker was not alive; joining")
1057
self.checker.join()
1058
self.checker = None
491
492
# If a checker exists, make sure it is not a zombie
493
try:
494
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
495
except (AttributeError, OSError) as error:
496
if (isinstance(error, OSError)
497
and error.errno != errno.ECHILD):
498
raise error
499
else:
500
if pid:
501
logger.warning("Checker was a zombie")
502
gobject.source_remove(self.checker_callback_tag)
503
self.checker_callback(pid, status,
504
self.current_checker_command)
1059
505
# Start a new checker if needed
1060
506
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}
1065
507
try:
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
508
# In case checker_command has exactly one % operator
509
command = self.checker_command % self.host
510
except TypeError:
511
# Escape attributes for the shell
512
escaped_attrs = dict(
513
(attr,
514
re.escape(unicode(str(getattr(self, attr, "")),
515
errors=
516
'replace')))
517
for attr in
518
self.runtime_expansions)
519
520
try:
521
command = self.checker_command % escaped_attrs
522
except TypeError as error:
523
logger.error('Could not format string "%s":'
524
' %s', self.checker_command, error)
525
return True # Try again later
1072
526
self.current_checker_command = command
1073
logger.info("Starting checker %r for %s", command,
1074
self.name)
1075
# We don't need to redirect stdout and stderr, since
1076
# in normal mode, that is already done by daemon(),
1077
# and in debug mode we don't want to. (Stdin is
1078
# always replaced by /dev/null.)
1079
# The exception is when not debugging but nevertheless
1080
# running in the foreground; use the previously
1081
# created wnull.
1082
popen_args = {"close_fds": True,
1083
"shell": True,
1084
"cwd": "/"}
1085
if (not self.server_settings["debug"]
1086
and self.server_settings["foreground"]):
1087
popen_args.update({"stdout": wnull,
1088
"stderr": wnull})
1089
pipe = multiprocessing.Pipe(duplex=False)
1090
self.checker = multiprocessing.Process(
1091
target=call_pipe,
1092
args=(pipe[1], subprocess.call, command),
1093
kwargs=popen_args)
1094
self.checker.start()
1095
self.checker_callback_tag = GLib.io_add_watch(
1096
pipe[0].fileno(), GLib.IO_IN,
1097
self.checker_callback, pipe[0], command)
1098
# Re-run this periodically if run by GLib.timeout_add
527
try:
528
logger.info("Starting checker %r for %s",
529
command, self.name)
530
# We don't need to redirect stdout and stderr, since
531
# in normal mode, that is already done by daemon(),
532
# and in debug mode we don't want to. (Stdin is
533
# always replaced by /dev/null.)
534
self.checker = subprocess.Popen(command,
535
close_fds=True,
536
shell=True, cwd="/")
537
self.checker_callback_tag = (gobject.child_watch_add
538
(self.checker.pid,
539
self.checker_callback,
540
data=command))
541
# The checker may have completed before the gobject
542
# watch was added. Check for this.
543
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
544
if pid:
545
gobject.source_remove(self.checker_callback_tag)
546
self.checker_callback(pid, status, command)
547
except OSError as error:
548
logger.error("Failed to start subprocess: %s",
549
error)
550
# Re-run this periodically if run by gobject.timeout_add
1099
551
return True
1100
552
1101
553
def stop_checker(self):
1102
554
"""Force the checker process, if any, to stop."""
1103
555
if self.checker_callback_tag:
1104
GLib.source_remove(self.checker_callback_tag)
556
gobject.source_remove(self.checker_callback_tag)
1105
557
self.checker_callback_tag = None
1106
558
if getattr(self, "checker", None) is None:
1107
559
return
1108
560
logger.debug("Stopping checker for %(name)s", vars(self))
1109
self.checker.terminate()
561
try:
562
os.kill(self.checker.pid, signal.SIGTERM)
563
#time.sleep(0.5)
564
#if self.checker.poll() is None:
565
# os.kill(self.checker.pid, signal.SIGKILL)
566
except OSError as error:
567
if error.errno != errno.ESRCH: # No such process
568
raise
1110
569
self.checker = None
1111
570
1112
571
1113
def dbus_service_property(dbus_interface,
1114
signature="v",
1115
access="readwrite",
1116
byte_arrays=False):
572
def dbus_service_property(dbus_interface, signature="v",
573
access="readwrite", byte_arrays=False):
1117
574
"""Decorators for marking methods of a DBusObjectWithProperties to
1118
575
become properties on the D-Bus.
1119
576
1120
577
The decorated method will be called with no arguments by "Get"
1121
578
and with one argument by "Set".
1122
579
1123
580
The parameters, where they are supported, are the same as
1124
581
dbus.service.method, except there is only "signature", since the
1125
582
type from Get() and the type sent to Set() is the same.
1128
585
# "Set" method, so we fail early here:
1129
586
if byte_arrays and signature != "ay":
1130
587
raise ValueError("Byte arrays not supported for non-'ay'"
1131
" signature {!r}".format(signature))
1132
588
" signature %r" % signature)
1133
589
def decorator(func):
1134
590
func._dbus_is_property = True
1135
591
func._dbus_interface = dbus_interface
1138
594
func._dbus_name = func.__name__
1139
595
if func._dbus_name.endswith("_dbus_property"):
1140
596
func._dbus_name = func._dbus_name[:-14]
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
597
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
598
return func
1187
599
return decorator
1188
600
1189
601
1190
602
class DBusPropertyException(dbus.exceptions.DBusException):
1191
603
"""A base class for D-Bus property-related exceptions
1192
604
"""
1193
pass
605
def __unicode__(self):
606
return unicode(str(self))
1194
607
1195
608
1196
609
class DBusPropertyAccessException(DBusPropertyException):
1205
618
pass
1206
619
1207
620
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):
621
class DBusObjectWithProperties(dbus.service.Object):
1298
622
"""A D-Bus object with properties.
1299
623
1300
624
Classes inheriting from this can use the dbus_service_property
1301
625
decorator to expose methods as D-Bus properties. It exposes the
1302
626
standard Get(), Set(), and GetAll() methods on the D-Bus.
1303
627
"""
1304
628
629
@staticmethod
630
def _is_dbus_property(obj):
631
return getattr(obj, "_dbus_is_property", False)
632
633
def _get_all_dbus_properties(self):
634
"""Returns a generator of (name, attribute) pairs
635
"""
636
return ((prop.__get__(self)._dbus_name, prop.__get__(self))
637
for cls in self.__class__.__mro__
638
for name, prop in
639
inspect.getmembers(cls, self._is_dbus_property))
640
1305
641
def _get_dbus_property(self, interface_name, property_name):
1306
642
"""Returns a bound method if one exists which is a D-Bus
1307
643
property with the specified name and interface.
1308
644
"""
1309
for cls in self.__class__.__mro__:
1310
for name, value in inspect.getmembers(
1311
cls, self._is_dbus_thing("property")):
645
for cls in self.__class__.__mro__:
646
for name, value in (inspect.getmembers
647
(cls, self._is_dbus_property)):
1312
648
if (value._dbus_name == property_name
1313
649
and value._dbus_interface == interface_name):
1314
650
return value.__get__(self)
1315
651
1316
652
# No such property
1317
raise DBusPropertyNotFound("{}:{}.{}".format(
1318
self.dbus_object_path, interface_name, property_name))
1319
1320
@classmethod
1321
def _get_all_interface_names(cls):
1322
"""Get a sequence of all interfaces supported by an object"""
1323
return (name for name in set(getattr(getattr(x, attr),
1324
"_dbus_interface", None)
1325
for x in (inspect.getmro(cls))
1326
for attr in dir(x))
1327
if name is not None)
1328
1329
@dbus.service.method(dbus.PROPERTIES_IFACE,
1330
in_signature="ss",
653
raise DBusPropertyNotFound(self.dbus_object_path + ":"
654
+ interface_name + "."
655
+ property_name)
656
657
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
1331
658
out_signature="v")
1332
659
def Get(self, interface_name, property_name):
1333
660
"""Standard D-Bus property Get() method, see D-Bus standard.
1339
666
if not hasattr(value, "variant_level"):
1340
667
return value
1341
668
return type(value)(value, variant_level=value.variant_level+1)
1342
669
1343
670
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
1344
671
def Set(self, interface_name, property_name, value):
1345
672
"""Standard D-Bus property Set() method, see D-Bus standard.
1351
678
# The byte_arrays option is not supported yet on
1352
679
# signatures other than "ay".
1353
680
if prop._dbus_signature != "ay":
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))
681
raise ValueError
682
value = dbus.ByteArray(''.join(unichr(byte)
683
for byte in value))
1359
684
prop(value)
1360
1361
@dbus.service.method(dbus.PROPERTIES_IFACE,
1362
in_signature="s",
685
686
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
1363
687
out_signature="a{sv}")
1364
688
def GetAll(self, interface_name):
1365
689
"""Standard D-Bus property GetAll() method, see D-Bus
1366
690
standard.
1367
691
1368
692
Note: Will not include properties with access="write".
1369
693
"""
1370
properties = {}
1371
for name, prop in self._get_all_dbus_things("property"):
694
all = {}
695
for name, prop in self._get_all_dbus_properties():
1372
696
if (interface_name
1373
697
and interface_name != prop._dbus_interface):
1374
698
# Interface non-empty but did not match
1378
702
continue
1379
703
value = prop()
1380
704
if not hasattr(value, "variant_level"):
1381
properties[name] = value
705
all[name] = value
1382
706
continue
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
707
all[name] = type(value)(value, variant_level=
708
value.variant_level+1)
709
return dbus.Dictionary(all, signature="sv")
710
1395
711
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1396
712
out_signature="s",
1397
713
path_keyword='object_path',
1398
714
connection_keyword='connection')
1399
715
def Introspect(self, object_path, connection):
1400
"""Overloading of standard D-Bus method.
1401
1402
Inserts property tags and interface annotation tags.
716
"""Standard D-Bus method, overloaded to insert property tags.
1403
717
"""
1404
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1405
object_path,
1406
connection)
718
xmlstring = dbus.service.Object.Introspect(self, object_path,
719
connection)
1407
720
try:
1408
721
document = xml.dom.minidom.parseString(xmlstring)
1409
1410
722
def make_tag(document, name, prop):
1411
723
e = document.createElement("property")
1412
724
e.setAttribute("name", name)
1413
725
e.setAttribute("type", prop._dbus_signature)
1414
726
e.setAttribute("access", prop._dbus_access)
1415
727
return e
1416
1417
728
for if_tag in document.getElementsByTagName("interface"):
1418
# Add property tags
1419
729
for tag in (make_tag(document, name, prop)
1420
730
for name, prop
1421
in self._get_all_dbus_things("property")
731
in self._get_all_dbus_properties()
1422
732
if prop._dbus_interface
1423
733
== if_tag.getAttribute("name")):
1424
734
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)
1441
735
# Add the names to the return values for the
1442
736
# "org.freedesktop.DBus.Properties" methods
1443
737
if (if_tag.getAttribute("name")
1458
752
except (AttributeError, xml.dom.DOMException,
1459
753
xml.parsers.expat.ExpatError) as error:
1460
754
logger.error("Failed to override Introspection method",
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):
755
error)
756
return xmlstring
757
758
759
def datetime_to_dbus (dt, variant_level=0):
1536
760
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1537
761
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).
762
return dbus.String("", variant_level = variant_level)
763
return dbus.String(dt.isoformat(),
764
variant_level=variant_level)
765
766
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
767
.__metaclass__):
768
"""Applied to an empty subclass of a D-Bus object, this metaclass
769
will add additional D-Bus attributes matching a certain pattern.
1564
770
"""
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):
771
def __new__(mcs, name, bases, attr):
772
# Go through all the base classes which could have D-Bus
773
# methods, signals, or properties in them
774
for base in (b for b in bases
775
if issubclass(b, dbus.service.Object)):
776
# Go though all attributes of the base class
777
for attrname, attribute in inspect.getmembers(base):
1573
778
# Ignore non-D-Bus attributes, and D-Bus attributes
1574
779
# with the wrong interface name
1575
780
if (not hasattr(attribute, "_dbus_interface")
1576
or not attribute._dbus_interface.startswith(
1577
orig_interface_name)):
781
or not attribute._dbus_interface
782
.startswith("se.recompile.Mandos")):
1578
783
continue
1579
784
# Create an alternate D-Bus interface name based on
1580
785
# the current name
1581
alt_interface = attribute._dbus_interface.replace(
1582
orig_interface_name, alt_interface_name)
1583
interface_names.add(alt_interface)
786
alt_interface = (attribute._dbus_interface
787
.replace("se.recompile.Mandos",
788
"se.bsnet.fukt.Mandos"))
1584
789
# Is this a D-Bus signal?
1585
790
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(
791
# Extract the original non-method function by
792
# black magic
793
nonmethod_func = (dict(
1590
794
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)
795
attribute.__closure__))["func"]
796
.cell_contents)
1598
797
# Create a new, but exactly alike, function
1599
798
# object, and decorate it to be a new D-Bus signal
1600
799
# 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
800
new_function = (dbus.service.signal
801
(alt_interface,
802
attribute._dbus_signature)
803
(types.FunctionType(
804
nonmethod_func.func_code,
805
nonmethod_func.func_globals,
806
nonmethod_func.func_name,
807
nonmethod_func.func_defaults,
808
nonmethod_func.func_closure)))
1612
809
# 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
810
# old and new functions, so both the old and new
811
# signals gets sent when the function is called
1616
812
def fixscope(func1, func2):
1617
813
"""This function is a scope container to pass
1618
814
func1 and func2 to the "call_both" function
1619
815
outside of its arguments"""
1620
1621
@functools.wraps(func2)
1622
816
def call_both(*args, **kwargs):
1623
817
"""This function will emit two D-Bus
1624
818
signals by calling func1 and func2"""
1625
819
func1(*args, **kwargs)
1626
820
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
821
return call_both
1634
822
# Create the "call_both" function and add it to
1635
823
# the class
1636
attr[attrname] = fixscope(attribute, new_function)
824
attr[attrname] = fixscope(attribute,
825
new_function)
1637
826
# Is this a D-Bus method?
1638
827
elif getattr(attribute, "_dbus_is_method", False):
1639
828
# Create a new, but exactly alike, function
1640
829
# object. Decorate it to be a new D-Bus method
1641
830
# with the alternate D-Bus interface name. Add it
1642
831
# 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
832
attr[attrname] = (dbus.service.method
833
(alt_interface,
834
attribute._dbus_in_signature,
835
attribute._dbus_out_signature)
836
(types.FunctionType
837
(attribute.func_code,
838
attribute.func_globals,
839
attribute.func_name,
840
attribute.func_defaults,
841
attribute.func_closure)))
1655
842
# Is this a D-Bus property?
1656
843
elif getattr(attribute, "_dbus_is_property", False):
1657
844
# Create a new, but exactly alike, function
1658
845
# object, and decorate it to be a new D-Bus
1659
846
# property with the alternate D-Bus interface
1660
847
# 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"})
848
attr[attrname] = (dbus_service_property
849
(alt_interface,
850
attribute._dbus_signature,
851
attribute._dbus_access,
852
attribute
853
._dbus_get_args_options
854
["byte_arrays"])
855
(types.FunctionType
856
(attribute.func_code,
857
attribute.func_globals,
858
attribute.func_name,
859
attribute.func_defaults,
860
attribute.func_closure)))
861
return type.__new__(mcs, name, bases, attr)
862
1713
863
class ClientDBus(Client, DBusObjectWithProperties):
1714
864
"""A Client class using D-Bus
1715
865
1716
866
Attributes:
1717
867
dbus_object_path: dbus.ObjectPath
1718
868
bus: dbus.SystemBus()
1719
869
"""
1720
870
1721
871
runtime_expansions = (Client.runtime_expansions
1722
+ ("dbus_object_path", ))
1723
1724
_interface = "se.recompile.Mandos.Client"
1725
872
+ ("dbus_object_path",))
873
1726
874
# dbus.service.Object doesn't use super(), so we can't either.
1727
1728
def __init__(self, bus=None, *args, **kwargs):
875
876
def __init__(self, bus = None, *args, **kwargs):
877
self._approvals_pending = 0
1729
878
self.bus = bus
1730
879
Client.__init__(self, *args, **kwargs)
1731
880
# Only now, when this client is initialized, can it show up on
1732
881
# the D-Bus
1733
client_object_name = str(self.name).translate(
882
client_object_name = unicode(self.name).translate(
1734
883
{ord("."): ord("_"),
1735
884
ord("-"): ord("_")})
1736
self.dbus_object_path = dbus.ObjectPath(
1737
"/clients/" + client_object_name)
885
self.dbus_object_path = (dbus.ObjectPath
886
("/clients/" + client_object_name))
1738
887
DBusObjectWithProperties.__init__(self, self.bus,
1739
888
self.dbus_object_path)
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):
889
890
def notifychangeproperty(transform_func,
891
dbus_name, type_func=lambda x: x,
892
variant_level=1):
1746
893
""" Modify a variable so that it's a property which announces
1747
894
its changes to DBus.
1748
895
1753
900
to the D-Bus. Default: no transform
1754
901
variant_level: D-Bus variant level. Default: 1
1755
902
"""
1756
attrname = "_{}".format(dbus_name)
1757
903
attrname = "_{0}".format(dbus_name)
1758
904
def setter(self, value):
1759
905
if hasattr(self, "dbus_object_path"):
1760
906
if (not hasattr(self, attrname) or
1761
907
type_func(getattr(self, attrname, None))
1762
908
!= 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())
909
dbus_value = transform_func(type_func(value),
910
variant_level
911
=variant_level)
912
self.PropertyChanged(dbus.String(dbus_name),
913
dbus_value)
1778
914
setattr(self, attrname, value)
1779
915
1780
916
return property(lambda self: getattr(self, attrname), setter)
1781
917
918
1782
919
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1783
920
approvals_pending = notifychangeproperty(dbus.Boolean,
1784
921
"ApprovalPending",
1785
type_func=bool)
922
type_func = bool)
1786
923
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1787
924
last_enabled = notifychangeproperty(datetime_to_dbus,
1788
925
"LastEnabled")
1789
checker = notifychangeproperty(
1790
dbus.Boolean, "CheckerRunning",
1791
type_func=lambda checker: checker is not None)
926
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
927
type_func = lambda checker:
928
checker is not None)
1792
929
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1793
930
"LastCheckedOK")
1794
last_checker_status = notifychangeproperty(dbus.Int16,
1795
"LastCheckerStatus")
1796
931
last_approval_request = notifychangeproperty(
1797
932
datetime_to_dbus, "LastApprovalRequest")
1798
933
approved_by_default = notifychangeproperty(dbus.Boolean,
1799
934
"ApprovedByDefault")
1800
approval_delay = notifychangeproperty(
1801
dbus.UInt64, "ApprovalDelay",
1802
type_func=lambda td: td.total_seconds() * 1000)
935
approval_delay = notifychangeproperty(dbus.UInt16,
936
"ApprovalDelay",
937
type_func =
938
_timedelta_to_milliseconds)
1803
939
approval_duration = notifychangeproperty(
1804
dbus.UInt64, "ApprovalDuration",
1805
type_func=lambda td: td.total_seconds() * 1000)
940
dbus.UInt16, "ApprovalDuration",
941
type_func = _timedelta_to_milliseconds)
1806
942
host = notifychangeproperty(dbus.String, "Host")
1807
timeout = notifychangeproperty(
1808
dbus.UInt64, "Timeout",
1809
type_func=lambda td: td.total_seconds() * 1000)
943
timeout = notifychangeproperty(dbus.UInt16, "Timeout",
944
type_func =
945
_timedelta_to_milliseconds)
1810
946
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)
947
dbus.UInt16, "ExtendedTimeout",
948
type_func = _timedelta_to_milliseconds)
949
interval = notifychangeproperty(dbus.UInt16,
950
"Interval",
951
type_func =
952
_timedelta_to_milliseconds)
1816
953
checker_command = notifychangeproperty(dbus.String, "Checker")
1817
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1818
invalidate_only=True)
1819
954
1820
955
del notifychangeproperty
1821
956
1822
957
def __del__(self, *args, **kwargs):
1823
958
try:
1824
959
self.remove_from_connection()
1827
962
if hasattr(DBusObjectWithProperties, "__del__"):
1828
963
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1829
964
Client.__del__(self, *args, **kwargs)
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:
965
966
def checker_callback(self, pid, condition, command,
967
*args, **kwargs):
968
self.checker_callback_tag = None
969
self.checker = None
970
if os.WIFEXITED(condition):
971
exitstatus = os.WEXITSTATUS(condition)
1838
972
# Emit D-Bus signal
1839
973
self.CheckerCompleted(dbus.Int16(exitstatus),
1840
# This is specific to GNU libC
1841
dbus.Int64(exitstatus << 8),
974
dbus.Int64(condition),
1842
975
dbus.String(command))
1843
976
else:
1844
977
# Emit D-Bus signal
1845
978
self.CheckerCompleted(dbus.Int16(-1),
1846
dbus.Int64(
1847
# This is specific to GNU libC
1848
(exitstatus << 8)
1849
| self.last_checker_signal),
979
dbus.Int64(condition),
1850
980
dbus.String(command))
1851
return ret
1852
981
982
return Client.checker_callback(self, pid, condition, command,
983
*args, **kwargs)
984
1853
985
def start_checker(self, *args, **kwargs):
1854
old_checker_pid = getattr(self.checker, "pid", None)
986
old_checker = self.checker
987
if self.checker is not None:
988
old_checker_pid = self.checker.pid
989
else:
990
old_checker_pid = None
1855
991
r = Client.start_checker(self, *args, **kwargs)
1856
992
# Only if new checker process was started
1857
993
if (self.checker is not None
1859
995
# Emit D-Bus signal
1860
996
self.CheckerStarted(self.current_checker_command)
1861
997
return r
1862
998
1863
999
def _reset_approved(self):
1864
self.approved = None
1000
self._approved = None
1865
1001
return False
1866
1002
1867
1003
def approve(self, value=True):
1868
self.approved = value
1869
GLib.timeout_add(int(self.approval_duration.total_seconds()
1870
* 1000), self._reset_approved)
1871
1004
self.send_changedstate()
1872
1873
# D-Bus methods, signals & properties
1874
1875
# Interfaces
1876
1877
# Signals
1878
1005
self._approved = value
1006
gobject.timeout_add(_timedelta_to_milliseconds
1007
(self.approval_duration),
1008
self._reset_approved)
1009
1010
1011
## D-Bus methods, signals & properties
1012
_interface = "se.recompile.Mandos.Client"
1013
1014
## Signals
1015
1879
1016
# CheckerCompleted - signal
1880
1017
@dbus.service.signal(_interface, signature="nxs")
1881
1018
def CheckerCompleted(self, exitcode, waitstatus, command):
1882
1019
"D-Bus signal"
1883
1020
pass
1884
1021
1885
1022
# CheckerStarted - signal
1886
1023
@dbus.service.signal(_interface, signature="s")
1887
1024
def CheckerStarted(self, command):
1888
1025
"D-Bus signal"
1889
1026
pass
1890
1027
1891
1028
# PropertyChanged - signal
1892
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1893
1029
@dbus.service.signal(_interface, signature="sv")
1894
1030
def PropertyChanged(self, property, value):
1895
1031
"D-Bus signal"
1896
1032
pass
1897
1033
1898
1034
# GotSecret - signal
1899
1035
@dbus.service.signal(_interface)
1900
1036
def GotSecret(self):
1903
1039
server to mandos-client
1904
1040
"""
1905
1041
pass
1906
1042
1907
1043
# Rejected - signal
1908
1044
@dbus.service.signal(_interface, signature="s")
1909
1045
def Rejected(self, reason):
1910
1046
"D-Bus signal"
1911
1047
pass
1912
1048
1913
1049
# NeedApproval - signal
1914
1050
@dbus.service.signal(_interface, signature="tb")
1915
1051
def NeedApproval(self, timeout, default):
1916
1052
"D-Bus signal"
1917
1053
return self.need_approval()
1918
1919
# Methods
1920
1054
1055
## Methods
1056
1921
1057
# Approve - method
1922
1058
@dbus.service.method(_interface, in_signature="b")
1923
1059
def Approve(self, value):
1924
1060
self.approve(value)
1925
1061
1926
1062
# CheckedOK - method
1927
1063
@dbus.service.method(_interface)
1928
1064
def CheckedOK(self):
1929
1065
self.checked_ok()
1930
1066
1931
1067
# Enable - method
1932
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1933
1068
@dbus.service.method(_interface)
1934
1069
def Enable(self):
1935
1070
"D-Bus method"
1936
1071
self.enable()
1937
1072
1938
1073
# StartChecker - method
1939
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1940
1074
@dbus.service.method(_interface)
1941
1075
def StartChecker(self):
1942
1076
"D-Bus method"
1943
1077
self.start_checker()
1944
1078
1945
1079
# Disable - method
1946
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1947
1080
@dbus.service.method(_interface)
1948
1081
def Disable(self):
1949
1082
"D-Bus method"
1950
1083
self.disable()
1951
1084
1952
1085
# StopChecker - method
1953
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1954
1086
@dbus.service.method(_interface)
1955
1087
def StopChecker(self):
1956
1088
self.stop_checker()
1957
1958
# Properties
1959
1089
1090
## Properties
1091
1960
1092
# ApprovalPending - property
1961
1093
@dbus_service_property(_interface, signature="b", access="read")
1962
1094
def ApprovalPending_dbus_property(self):
1963
1095
return dbus.Boolean(bool(self.approvals_pending))
1964
1096
1965
1097
# ApprovedByDefault - property
1966
@dbus_service_property(_interface,
1967
signature="b",
1098
@dbus_service_property(_interface, signature="b",
1968
1099
access="readwrite")
1969
1100
def ApprovedByDefault_dbus_property(self, value=None):
1970
1101
if value is None: # get
1971
1102
return dbus.Boolean(self.approved_by_default)
1972
1103
self.approved_by_default = bool(value)
1973
1104
1974
1105
# ApprovalDelay - property
1975
@dbus_service_property(_interface,
1976
signature="t",
1106
@dbus_service_property(_interface, signature="t",
1977
1107
access="readwrite")
1978
1108
def ApprovalDelay_dbus_property(self, value=None):
1979
1109
if value is None: # get
1980
return dbus.UInt64(self.approval_delay.total_seconds()
1981
* 1000)
1110
return dbus.UInt64(self.approval_delay_milliseconds())
1982
1111
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1983
1112
1984
1113
# ApprovalDuration - property
1985
@dbus_service_property(_interface,
1986
signature="t",
1114
@dbus_service_property(_interface, signature="t",
1987
1115
access="readwrite")
1988
1116
def ApprovalDuration_dbus_property(self, value=None):
1989
1117
if value is None: # get
1990
return dbus.UInt64(self.approval_duration.total_seconds()
1991
* 1000)
1118
return dbus.UInt64(_timedelta_to_milliseconds(
1119
self.approval_duration))
1992
1120
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1993
1121
1994
1122
# Name - property
1995
@dbus_annotations(
1996
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1997
1123
@dbus_service_property(_interface, signature="s", access="read")
1998
1124
def Name_dbus_property(self):
1999
1125
return dbus.String(self.name)
2000
1126
2001
1127
# Fingerprint - property
2002
@dbus_annotations(
2003
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2004
1128
@dbus_service_property(_interface, signature="s", access="read")
2005
1129
def Fingerprint_dbus_property(self):
2006
1130
return dbus.String(self.fingerprint)
2007
1131
2008
1132
# Host - property
2009
@dbus_service_property(_interface,
2010
signature="s",
1133
@dbus_service_property(_interface, signature="s",
2011
1134
access="readwrite")
2012
1135
def Host_dbus_property(self, value=None):
2013
1136
if value is None: # get
2014
1137
return dbus.String(self.host)
2015
self.host = str(value)
2016
1138
self.host = value
1139
2017
1140
# Created - property
2018
@dbus_annotations(
2019
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2020
1141
@dbus_service_property(_interface, signature="s", access="read")
2021
1142
def Created_dbus_property(self):
2022
return datetime_to_dbus(self.created)
2023
1143
return dbus.String(datetime_to_dbus(self.created))
1144
2024
1145
# LastEnabled - property
2025
1146
@dbus_service_property(_interface, signature="s", access="read")
2026
1147
def LastEnabled_dbus_property(self):
2027
1148
return datetime_to_dbus(self.last_enabled)
2028
1149
2029
1150
# Enabled - property
2030
@dbus_service_property(_interface,
2031
signature="b",
1151
@dbus_service_property(_interface, signature="b",
2032
1152
access="readwrite")
2033
1153
def Enabled_dbus_property(self, value=None):
2034
1154
if value is None: # get
2037
1157
self.enable()
2038
1158
else:
2039
1159
self.disable()
2040
1160
2041
1161
# LastCheckedOK - property
2042
@dbus_service_property(_interface,
2043
signature="s",
1162
@dbus_service_property(_interface, signature="s",
2044
1163
access="readwrite")
2045
1164
def LastCheckedOK_dbus_property(self, value=None):
2046
1165
if value is not None:
2047
1166
self.checked_ok()
2048
1167
return
2049
1168
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
1169
2056
1170
# Expires - property
2057
1171
@dbus_service_property(_interface, signature="s", access="read")
2058
1172
def Expires_dbus_property(self):
2059
1173
return datetime_to_dbus(self.expires)
2060
1174
2061
1175
# LastApprovalRequest - property
2062
1176
@dbus_service_property(_interface, signature="s", access="read")
2063
1177
def LastApprovalRequest_dbus_property(self):
2064
1178
return datetime_to_dbus(self.last_approval_request)
2065
1179
2066
1180
# Timeout - property
2067
@dbus_service_property(_interface,
2068
signature="t",
1181
@dbus_service_property(_interface, signature="t",
2069
1182
access="readwrite")
2070
1183
def Timeout_dbus_property(self, value=None):
2071
1184
if value is None: # get
2072
return dbus.UInt64(self.timeout.total_seconds() * 1000)
2073
old_timeout = self.timeout
1185
return dbus.UInt64(self.timeout_milliseconds())
2074
1186
self.timeout = datetime.timedelta(0, 0, 0, value)
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)
2090
1187
if getattr(self, "disable_initiator_tag", None) is None:
1188
return
1189
# Reschedule timeout
1190
gobject.source_remove(self.disable_initiator_tag)
1191
self.disable_initiator_tag = None
1192
self.expires = None
1193
time_to_die = _timedelta_to_milliseconds((self
1194
.last_checked_ok
1195
+ self.timeout)
1196
- datetime.datetime
1197
.utcnow())
1198
if time_to_die <= 0:
1199
# The timeout has passed
1200
self.disable()
1201
else:
1202
self.expires = (datetime.datetime.utcnow()
1203
+ datetime.timedelta(milliseconds =
1204
time_to_die))
1205
self.disable_initiator_tag = (gobject.timeout_add
1206
(time_to_die, self.disable))
1207
2091
1208
# ExtendedTimeout - property
2092
@dbus_service_property(_interface,
2093
signature="t",
1209
@dbus_service_property(_interface, signature="t",
2094
1210
access="readwrite")
2095
1211
def ExtendedTimeout_dbus_property(self, value=None):
2096
1212
if value is None: # get
2097
return dbus.UInt64(self.extended_timeout.total_seconds()
2098
* 1000)
1213
return dbus.UInt64(self.extended_timeout_milliseconds())
2099
1214
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
2100
1215
2101
1216
# Interval - property
2102
@dbus_service_property(_interface,
2103
signature="t",
1217
@dbus_service_property(_interface, signature="t",
2104
1218
access="readwrite")
2105
1219
def Interval_dbus_property(self, value=None):
2106
1220
if value is None: # get
2107
return dbus.UInt64(self.interval.total_seconds() * 1000)
1221
return dbus.UInt64(self.interval_milliseconds())
2108
1222
self.interval = datetime.timedelta(0, 0, 0, value)
2109
1223
if getattr(self, "checker_initiator_tag", None) is None:
2110
1224
return
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
2117
1225
# Reschedule checker run
1226
gobject.source_remove(self.checker_initiator_tag)
1227
self.checker_initiator_tag = (gobject.timeout_add
1228
(value, self.start_checker))
1229
self.start_checker() # Start one now, too
1230
2118
1231
# Checker - property
2119
@dbus_service_property(_interface,
2120
signature="s",
1232
@dbus_service_property(_interface, signature="s",
2121
1233
access="readwrite")
2122
1234
def Checker_dbus_property(self, value=None):
2123
1235
if value is None: # get
2124
1236
return dbus.String(self.checker_command)
2125
self.checker_command = str(value)
2126
1237
self.checker_command = value
1238
2127
1239
# CheckerRunning - property
2128
@dbus_service_property(_interface,
2129
signature="b",
1240
@dbus_service_property(_interface, signature="b",
2130
1241
access="readwrite")
2131
1242
def CheckerRunning_dbus_property(self, value=None):
2132
1243
if value is None: # get
2135
1246
self.start_checker()
2136
1247
else:
2137
1248
self.stop_checker()
2138
1249
2139
1250
# ObjectPath - property
2140
@dbus_annotations(
2141
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
2142
"org.freedesktop.DBus.Deprecated": "true"})
2143
1251
@dbus_service_property(_interface, signature="o", access="read")
2144
1252
def ObjectPath_dbus_property(self):
2145
return self.dbus_object_path # is already a dbus.ObjectPath
2146
1253
return self.dbus_object_path # is already a dbus.ObjectPath
1254
2147
1255
# Secret = property
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)
1256
@dbus_service_property(_interface, signature="ay",
1257
access="write", byte_arrays=True)
2155
1258
def Secret_dbus_property(self, value):
2156
self.secret = bytes(value)
2157
1259
self.secret = str(value)
1260
2158
1261
del _interface
2159
1262
2160
1263
2163
1266
self._pipe = child_pipe
2164
1267
self._pipe.send(('init', fpr, address))
2165
1268
if not self._pipe.recv():
2166
raise KeyError(fpr)
2167
1269
raise KeyError()
1270
2168
1271
def __getattribute__(self, name):
2169
if name == '_pipe':
1272
if(name == '_pipe'):
2170
1273
return super(ProxyClient, self).__getattribute__(name)
2171
1274
self._pipe.send(('getattr', name))
2172
1275
data = self._pipe.recv()
2173
1276
if data[0] == 'data':
2174
1277
return data[1]
2175
1278
if data[0] == 'function':
2176
2177
1279
def func(*args, **kwargs):
2178
1280
self._pipe.send(('funcall', name, args, kwargs))
2179
1281
return self._pipe.recv()[1]
2180
2181
1282
return func
2182
1283
2183
1284
def __setattr__(self, name, value):
2184
if name == '_pipe':
1285
if(name == '_pipe'):
2185
1286
return super(ProxyClient, self).__setattr__(name, value)
2186
1287
self._pipe.send(('setattr', name, value))
2187
1288
1289
class ClientDBusTransitional(ClientDBus):
1290
__metaclass__ = AlternateDBusNamesMetaclass
2188
1291
2189
1292
class ClientHandler(socketserver.BaseRequestHandler, object):
2190
1293
"""A class to handle client connections.
2191
1294
2192
1295
Instantiated once for each connection to handle it.
2193
1296
Note: This will run in its own forked process."""
2194
1297
2195
1298
def handle(self):
2196
1299
with contextlib.closing(self.server.child_pipe) as child_pipe:
2197
1300
logger.info("TCP connection from: %s",
2198
str(self.client_address))
1301
unicode(self.client_address))
2199
1302
logger.debug("Pipe FD: %d",
2200
1303
self.server.child_pipe.fileno())
2201
2202
session = gnutls.ClientSession(self.request)
2203
2204
# priority = ':'.join(("NONE", "+VERS-TLS1.1",
2205
# "+AES-256-CBC", "+SHA1",
2206
# "+COMP-NULL", "+CTYPE-OPENPGP",
2207
# "+DHE-DSS"))
1304
1305
session = (gnutls.connection
1306
.ClientSession(self.request,
1307
gnutls.connection
1308
.X509Credentials()))
1309
1310
# Note: gnutls.connection.X509Credentials is really a
1311
# generic GnuTLS certificate credentials object so long as
1312
# no X.509 keys are added to it. Therefore, we can use it
1313
# here despite using OpenPGP certificates.
1314
1315
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1316
# "+AES-256-CBC", "+SHA1",
1317
# "+COMP-NULL", "+CTYPE-OPENPGP",
1318
# "+DHE-DSS"))
2208
1319
# Use a fallback default, since this MUST be set.
2209
1320
priority = self.server.gnutls_priority
2210
1321
if priority is None:
2211
1322
priority = "NORMAL"
2212
gnutls.priority_set_direct(session._c_object,
2213
priority.encode("utf-8"),
2214
None)
2215
1323
(gnutls.library.functions
1324
.gnutls_priority_set_direct(session._c_object,
1325
priority, None))
1326
2216
1327
# Start communication using the Mandos protocol
2217
1328
# Get protocol number
2218
1329
line = self.request.makefile().readline()
2219
1330
logger.debug("Protocol version: %r", line)
2220
1331
try:
2221
1332
if int(line.strip().split()[0]) > 1:
2222
raise RuntimeError(line)
1333
raise RuntimeError
2223
1334
except (ValueError, IndexError, RuntimeError) as error:
2224
1335
logger.error("Unknown protocol version: %s", error)
2225
1336
return
2226
1337
2227
1338
# Start GnuTLS connection
2228
1339
try:
2229
1340
session.handshake()
2230
except gnutls.Error as error:
1341
except gnutls.errors.GNUTLSError as error:
2231
1342
logger.warning("Handshake failed: %s", error)
2232
1343
# Do not run session.bye() here: the session is not
2233
1344
# established. Just abandon the request.
2234
1345
return
2235
1346
logger.debug("Handshake succeeded")
2236
1347
2237
1348
approval_required = False
2238
1349
try:
2239
1350
try:
2240
fpr = self.fingerprint(
2241
self.peer_certificate(session))
2242
except (TypeError, gnutls.Error) as error:
1351
fpr = self.fingerprint(self.peer_certificate
1352
(session))
1353
except (TypeError,
1354
gnutls.errors.GNUTLSError) as error:
2243
1355
logger.warning("Bad certificate: %s", error)
2244
1356
return
2245
1357
logger.debug("Fingerprint: %s", fpr)
2246
1358
2247
1359
try:
2248
1360
client = ProxyClient(child_pipe, fpr,
2249
1361
self.client_address)
2250
1362
except KeyError:
2251
1363
return
2252
1364
2253
1365
if client.approval_delay:
2254
1366
delay = client.approval_delay
2255
1367
client.approvals_pending += 1
2256
1368
approval_required = True
2257
1369
2258
1370
while True:
2259
1371
if not client.enabled:
2260
1372
logger.info("Client %s is disabled",
2261
client.name)
1373
client.name)
2262
1374
if self.server.use_dbus:
2263
1375
# Emit D-Bus signal
2264
1376
client.Rejected("Disabled")
2265
1377
return
2266
2267
if client.approved or not client.approval_delay:
2268
# We are approved or approval is disabled
1378
1379
if client._approved or not client.approval_delay:
1380
#We are approved or approval is disabled
2269
1381
break
2270
elif client.approved is None:
1382
elif client._approved is None:
2271
1383
logger.info("Client %s needs approval",
2272
1384
client.name)
2273
1385
if self.server.use_dbus:
2274
1386
# Emit D-Bus signal
2275
1387
client.NeedApproval(
2276
client.approval_delay.total_seconds()
2277
* 1000, client.approved_by_default)
1388
client.approval_delay_milliseconds(),
1389
client.approved_by_default)
2278
1390
else:
2279
1391
logger.warning("Client %s was not approved",
2280
1392
client.name)
2282
1394
# Emit D-Bus signal
2283
1395
client.Rejected("Denied")
2284
1396
return
2285
2286
# wait until timeout or approved
1397
1398
#wait until timeout or approved
2287
1399
time = datetime.datetime.now()
2288
1400
client.changedstate.acquire()
2289
client.changedstate.wait(delay.total_seconds())
1401
(client.changedstate.wait
1402
(float(client._timedelta_to_milliseconds(delay)
1403
/ 1000)))
2290
1404
client.changedstate.release()
2291
1405
time2 = datetime.datetime.now()
2292
1406
if (time2 - time) >= delay:
2302
1416
break
2303
1417
else:
2304
1418
delay -= time2 - time
2305
2306
try:
2307
session.send(client.secret)
2308
except gnutls.Error as error:
2309
logger.warning("gnutls send failed",
2310
exc_info=error)
2311
return
2312
1419
1420
sent_size = 0
1421
while sent_size < len(client.secret):
1422
try:
1423
sent = session.send(client.secret[sent_size:])
1424
except gnutls.errors.GNUTLSError as error:
1425
logger.warning("gnutls send failed")
1426
return
1427
logger.debug("Sent: %d, remaining: %d",
1428
sent, len(client.secret)
1429
- (sent_size + sent))
1430
sent_size += sent
1431
2313
1432
logger.info("Sending secret to %s", client.name)
2314
1433
# bump the timeout using extended_timeout
2315
client.bump_timeout(client.extended_timeout)
1434
client.checked_ok(client.extended_timeout)
2316
1435
if self.server.use_dbus:
2317
1436
# Emit D-Bus signal
2318
1437
client.GotSecret()
2319
1438
2320
1439
finally:
2321
1440
if approval_required:
2322
1441
client.approvals_pending -= 1
2323
1442
try:
2324
1443
session.bye()
2325
except gnutls.Error as error:
2326
logger.warning("GnuTLS bye failed",
2327
exc_info=error)
2328
1444
except gnutls.errors.GNUTLSError as error:
1445
logger.warning("GnuTLS bye failed")
1446
2329
1447
@staticmethod
2330
1448
def peer_certificate(session):
2331
1449
"Return the peer's OpenPGP certificate as a bytestring"
2332
1450
# If not an OpenPGP certificate...
2333
if (gnutls.certificate_type_get(session._c_object)
2334
!= gnutls.CRT_OPENPGP):
2335
# ...return invalid data
2336
return b""
1451
if (gnutls.library.functions
1452
.gnutls_certificate_type_get(session._c_object)
1453
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1454
# ...do the normal thing
1455
return session.peer_certificate
2337
1456
list_size = ctypes.c_uint(1)
2338
cert_list = (gnutls.certificate_get_peers
1457
cert_list = (gnutls.library.functions
1458
.gnutls_certificate_get_peers
2339
1459
(session._c_object, ctypes.byref(list_size)))
2340
1460
if not bool(cert_list) and list_size.value != 0:
2341
raise gnutls.Error("error getting peer certificate")
1461
raise gnutls.errors.GNUTLSError("error getting peer"
1462
" certificate")
2342
1463
if list_size.value == 0:
2343
1464
return None
2344
1465
cert = cert_list[0]
2345
1466
return ctypes.string_at(cert.data, cert.size)
2346
1467
2347
1468
@staticmethod
2348
1469
def fingerprint(openpgp):
2349
1470
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
2350
1471
# New GnuTLS "datum" with the OpenPGP public key
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)))
1472
datum = (gnutls.library.types
1473
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1474
ctypes.POINTER
1475
(ctypes.c_ubyte)),
1476
ctypes.c_uint(len(openpgp))))
2355
1477
# New empty GnuTLS certificate
2356
crt = gnutls.openpgp_crt_t()
2357
gnutls.openpgp_crt_init(ctypes.byref(crt))
1478
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1479
(gnutls.library.functions
1480
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
2358
1481
# Import the OpenPGP public key into the certificate
2359
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2360
gnutls.OPENPGP_FMT_RAW)
1482
(gnutls.library.functions
1483
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1484
gnutls.library.constants
1485
.GNUTLS_OPENPGP_FMT_RAW))
2361
1486
# Verify the self signature in the key
2362
1487
crtverify = ctypes.c_uint()
2363
gnutls.openpgp_crt_verify_self(crt, 0,
2364
ctypes.byref(crtverify))
1488
(gnutls.library.functions
1489
.gnutls_openpgp_crt_verify_self(crt, 0,
1490
ctypes.byref(crtverify)))
2365
1491
if crtverify.value != 0:
2366
gnutls.openpgp_crt_deinit(crt)
2367
raise gnutls.CertificateSecurityError("Verify failed")
1492
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1493
raise (gnutls.errors.CertificateSecurityError
1494
("Verify failed"))
2368
1495
# New buffer for the fingerprint
2369
1496
buf = ctypes.create_string_buffer(20)
2370
1497
buf_len = ctypes.c_size_t()
2371
1498
# Get the fingerprint from the certificate into the buffer
2372
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2373
ctypes.byref(buf_len))
1499
(gnutls.library.functions
1500
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1501
ctypes.byref(buf_len)))
2374
1502
# Deinit the certificate
2375
gnutls.openpgp_crt_deinit(crt)
1503
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2376
1504
# Convert the buffer to a Python bytestring
2377
1505
fpr = ctypes.string_at(buf, buf_len.value)
2378
1506
# Convert the bytestring to hexadecimal notation
2379
hex_fpr = binascii.hexlify(fpr).upper()
1507
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
2380
1508
return hex_fpr
2381
1509
2382
1510
2383
1511
class MultiprocessingMixIn(object):
2384
1512
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2385
2386
1513
def sub_process_main(self, request, address):
2387
1514
try:
2388
1515
self.finish_request(request, address)
2389
except Exception:
1516
except:
2390
1517
self.handle_error(request, address)
2391
1518
self.close_request(request)
2392
1519
2393
1520
def process_request(self, request, address):
2394
1521
"""Start a new process to process the request."""
2395
proc = multiprocessing.Process(target=self.sub_process_main,
2396
args=(request, address))
1522
proc = multiprocessing.Process(target = self.sub_process_main,
1523
args = (request,
1524
address))
2397
1525
proc.start()
2398
1526
return proc
2399
1527
2400
1528
2401
1529
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
2402
1530
""" adds a pipe to the MixIn """
2403
2404
1531
def process_request(self, request, client_address):
2405
1532
"""Overrides and wraps the original process_request().
2406
1533
2407
1534
This function creates a new pipe in self.pipe
2408
1535
"""
2409
1536
parent_pipe, self.child_pipe = multiprocessing.Pipe()
2410
1537
2411
1538
proc = MultiprocessingMixIn.process_request(self, request,
2412
1539
client_address)
2413
1540
self.child_pipe.close()
2414
1541
self.add_pipe(parent_pipe, proc)
2415
1542
2416
1543
def add_pipe(self, parent_pipe, proc):
2417
1544
"""Dummy function; override as necessary"""
2418
raise NotImplementedError()
1545
raise NotImplementedError
2419
1546
2420
1547
2421
1548
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
2422
1549
socketserver.TCPServer, object):
2423
1550
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
2424
1551
2425
1552
Attributes:
2426
1553
enabled: Boolean; whether this server is activated yet
2427
1554
interface: None or a network interface name (string)
2428
1555
use_ipv6: Boolean; to use IPv6 or not
2429
1556
"""
2430
2431
1557
def __init__(self, server_address, RequestHandlerClass,
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
"""
1558
interface=None, use_ipv6=True):
2438
1559
self.interface = interface
2439
1560
if use_ipv6:
2440
1561
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.
2468
1562
socketserver.TCPServer.__init__(self, server_address,
2469
1563
RequestHandlerClass)
2470
2471
1564
def server_bind(self):
2472
1565
"""This overrides the normal server_bind() function
2473
1566
to bind to an interface if one was specified, and also NOT to
2474
1567
bind to an address or port if they were not specified."""
2475
global SO_BINDTODEVICE
2476
1568
if self.interface is not None:
2477
1569
if SO_BINDTODEVICE is None:
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
1570
logger.error("SO_BINDTODEVICE does not exist;"
1571
" cannot bind to interface %s",
1572
self.interface)
1573
else:
1574
try:
1575
self.socket.setsockopt(socket.SOL_SOCKET,
1576
SO_BINDTODEVICE,
1577
str(self.interface
1578
+ '\0'))
1579
except socket.error as error:
1580
if error[0] == errno.EPERM:
1581
logger.error("No permission to"
1582
" bind to interface %s",
1583
self.interface)
1584
elif error[0] == errno.ENOPROTOOPT:
1585
logger.error("SO_BINDTODEVICE not available;"
1586
" cannot bind to interface %s",
1587
self.interface)
1588
else:
1589
raise
2499
1590
# Only bind(2) the socket if we really need to.
2500
1591
if self.server_address[0] or self.server_address[1]:
2501
1592
if not self.server_address[0]:
2502
1593
if self.address_family == socket.AF_INET6:
2503
any_address = "::" # in6addr_any
1594
any_address = "::" # in6addr_any
2504
1595
else:
2505
any_address = "0.0.0.0" # INADDR_ANY
1596
any_address = socket.INADDR_ANY
2506
1597
self.server_address = (any_address,
2507
1598
self.server_address[1])
2508
1599
elif not self.server_address[1]:
2509
self.server_address = (self.server_address[0], 0)
1600
self.server_address = (self.server_address[0],
1601
0)
2510
1602
# if self.interface:
2511
1603
# self.server_address = (self.server_address[0],
2512
1604
# 0, # port
2518
1610
2519
1611
class MandosServer(IPv6_TCPServer):
2520
1612
"""Mandos server.
2521
1613
2522
1614
Attributes:
2523
1615
clients: set of Client objects
2524
1616
gnutls_priority GnuTLS priority string
2525
1617
use_dbus: Boolean; to emit D-Bus signals or not
2526
2527
Assumes a GLib.MainLoop event loop.
1618
1619
Assumes a gobject.MainLoop event loop.
2528
1620
"""
2529
2530
1621
def __init__(self, server_address, RequestHandlerClass,
2531
interface=None,
2532
use_ipv6=True,
2533
clients=None,
2534
gnutls_priority=None,
2535
use_dbus=True,
2536
socketfd=None):
1622
interface=None, use_ipv6=True, clients=None,
1623
gnutls_priority=None, use_dbus=True):
2537
1624
self.enabled = False
2538
1625
self.clients = clients
2539
1626
if self.clients is None:
2540
self.clients = {}
1627
self.clients = set()
2541
1628
self.use_dbus = use_dbus
2542
1629
self.gnutls_priority = gnutls_priority
2543
1630
IPv6_TCPServer.__init__(self, server_address,
2544
1631
RequestHandlerClass,
2545
interface=interface,
2546
use_ipv6=use_ipv6,
2547
socketfd=socketfd)
2548
1632
interface = interface,
1633
use_ipv6 = use_ipv6)
2549
1634
def server_activate(self):
2550
1635
if self.enabled:
2551
1636
return socketserver.TCPServer.server_activate(self)
2552
1637
2553
1638
def enable(self):
2554
1639
self.enabled = True
2555
1640
2556
1641
def add_pipe(self, parent_pipe, proc):
2557
1642
# Call "handle_ipc" for both data and EOF events
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,
2568
client_object=None):
1643
gobject.io_add_watch(parent_pipe.fileno(),
1644
gobject.IO_IN | gobject.IO_HUP,
1645
functools.partial(self.handle_ipc,
1646
parent_pipe =
1647
parent_pipe,
1648
proc = proc))
1649
1650
def handle_ipc(self, source, condition, parent_pipe=None,
1651
proc = None, client_object=None):
1652
condition_names = {
1653
gobject.IO_IN: "IN", # There is data to read.
1654
gobject.IO_OUT: "OUT", # Data can be written (without
1655
# blocking).
1656
gobject.IO_PRI: "PRI", # There is urgent data to read.
1657
gobject.IO_ERR: "ERR", # Error condition.
1658
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1659
# broken, usually for pipes and
1660
# sockets).
1661
}
1662
conditions_string = ' | '.join(name
1663
for cond, name in
1664
condition_names.iteritems()
1665
if cond & condition)
2569
1666
# error, or the other end of multiprocessing.Pipe has closed
2570
if condition & (GLib.IO_ERR | GLib.IO_HUP):
1667
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
2571
1668
# Wait for other process to exit
2572
1669
proc.join()
2573
1670
return False
2574
1671
2575
1672
# Read a request from the child
2576
1673
request = parent_pipe.recv()
2577
1674
command = request[0]
2578
1675
2579
1676
if command == 'init':
2580
1677
fpr = request[1]
2581
1678
address = request[2]
2582
2583
for c in self.clients.values():
1679
1680
for c in self.clients:
2584
1681
if c.fingerprint == fpr:
2585
1682
client = c
2586
1683
break
2593
1690
address[0])
2594
1691
parent_pipe.send(False)
2595
1692
return False
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))
1693
1694
gobject.io_add_watch(parent_pipe.fileno(),
1695
gobject.IO_IN | gobject.IO_HUP,
1696
functools.partial(self.handle_ipc,
1697
parent_pipe =
1698
parent_pipe,
1699
proc = proc,
1700
client_object =
1701
client))
2604
1702
parent_pipe.send(True)
2605
1703
# remove the old hook in favor of the new above hook on
2606
1704
# same fileno
2609
1707
funcname = request[1]
2610
1708
args = request[2]
2611
1709
kwargs = request[3]
2612
1710
2613
1711
parent_pipe.send(('data', getattr(client_object,
2614
1712
funcname)(*args,
2615
**kwargs)))
2616
1713
**kwargs)))
1714
2617
1715
if command == 'getattr':
2618
1716
attrname = request[1]
2619
if isinstance(client_object.__getattribute__(attrname),
2620
collections.Callable):
2621
parent_pipe.send(('function', ))
1717
if callable(client_object.__getattribute__(attrname)):
1718
parent_pipe.send(('function',))
2622
1719
else:
2623
parent_pipe.send((
2624
'data', client_object.__getattribute__(attrname)))
2625
1720
parent_pipe.send(('data', client_object
1721
.__getattribute__(attrname)))
1722
2626
1723
if command == 'setattr':
2627
1724
attrname = request[1]
2628
1725
value = request[2]
2629
1726
setattr(client_object, attrname, value)
2630
1727
2631
1728
return True
2632
1729
2633
1730
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
2733
1731
def string_to_delta(interval):
2734
1732
"""Parse a string and return a datetime.timedelta
2735
1733
2736
1734
>>> string_to_delta('7d')
2737
1735
datetime.timedelta(7)
2738
1736
>>> string_to_delta('60s')
2746
1744
>>> string_to_delta('5m 30s')
2747
1745
datetime.timedelta(0, 330)
2748
1746
"""
2749
2750
try:
2751
return rfc3339_duration_to_delta(interval)
2752
except ValueError:
2753
pass
2754
2755
1747
timevalue = datetime.timedelta(0)
2756
1748
for s in interval.split():
2757
1749
try:
2758
suffix = s[-1]
1750
suffix = unicode(s[-1])
2759
1751
value = int(s[:-1])
2760
1752
if suffix == "d":
2761
1753
delta = datetime.timedelta(value)
2768
1760
elif suffix == "w":
2769
1761
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
2770
1762
else:
2771
raise ValueError("Unknown suffix {!r}".format(suffix))
2772
except IndexError as e:
1763
raise ValueError("Unknown suffix %r" % suffix)
1764
except (ValueError, IndexError) as e:
2773
1765
raise ValueError(*(e.args))
2774
1766
timevalue += delta
2775
1767
return timevalue
2776
1768
2777
1769
2778
def daemon(nochdir=False, noclose=False):
1770
def if_nametoindex(interface):
1771
"""Call the C function if_nametoindex(), or equivalent
1772
1773
Note: This function cannot accept a unicode string."""
1774
global if_nametoindex
1775
try:
1776
if_nametoindex = (ctypes.cdll.LoadLibrary
1777
(ctypes.util.find_library("c"))
1778
.if_nametoindex)
1779
except (OSError, AttributeError):
1780
logger.warning("Doing if_nametoindex the hard way")
1781
def if_nametoindex(interface):
1782
"Get an interface index the hard way, i.e. using fcntl()"
1783
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1784
with contextlib.closing(socket.socket()) as s:
1785
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1786
struct.pack(str("16s16x"),
1787
interface))
1788
interface_index = struct.unpack(str("I"),
1789
ifreq[16:20])[0]
1790
return interface_index
1791
return if_nametoindex(interface)
1792
1793
1794
def daemon(nochdir = False, noclose = False):
2779
1795
"""See daemon(3). Standard BSD Unix function.
2780
1796
2781
1797
This should really exist as os.daemon, but it doesn't (yet)."""
2782
1798
if os.fork():
2783
1799
sys.exit()
2788
1804
sys.exit()
2789
1805
if not noclose:
2790
1806
# Close all standard open file descriptors
2791
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1807
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2792
1808
if not stat.S_ISCHR(os.fstat(null).st_mode):
2793
1809
raise OSError(errno.ENODEV,
2794
"{} not a character device"
2795
.format(os.devnull))
1810
"%s not a character device"
1811
% os.path.devnull)
2796
1812
os.dup2(null, sys.stdin.fileno())
2797
1813
os.dup2(null, sys.stdout.fileno())
2798
1814
os.dup2(null, sys.stderr.fileno())
2801
1817
2802
1818
2803
1819
def main():
2804
1820
2805
1821
##################################################################
2806
1822
# Parsing of options, both command line and config file
2807
1823
2808
1824
parser = argparse.ArgumentParser()
2809
1825
parser.add_argument("-v", "--version", action="version",
2810
version="%(prog)s {}".format(version),
1826
version = "%%(prog)s %s" % version,
2811
1827
help="show version number and exit")
2812
1828
parser.add_argument("-i", "--interface", metavar="IF",
2813
1829
help="Bind to interface IF")
2819
1835
help="Run self-test")
2820
1836
parser.add_argument("--debug", action="store_true",
2821
1837
help="Debug mode; run in foreground and log"
2822
" to terminal", default=None)
1838
" to terminal")
2823
1839
parser.add_argument("--debuglevel", metavar="LEVEL",
2824
1840
help="Debug level for stdout output")
2825
1841
parser.add_argument("--priority", help="GnuTLS"
2832
1848
" files")
2833
1849
parser.add_argument("--no-dbus", action="store_false",
2834
1850
dest="use_dbus", help="Do not provide D-Bus"
2835
" system bus interface", default=None)
1851
" system bus interface")
2836
1852
parser.add_argument("--no-ipv6", action="store_false",
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
1853
dest="use_ipv6", help="Do not use IPv6")
2853
1854
options = parser.parse_args()
2854
1855
2855
1856
if options.check:
2856
1857
import doctest
2857
fail_count, test_count = doctest.testmod()
2858
sys.exit(os.EX_OK if fail_count == 0 else 1)
2859
1858
doctest.testmod()
1859
sys.exit()
1860
2860
1861
# Default values for config file for server-global settings
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
1862
server_defaults = { "interface": "",
1863
"address": "",
1864
"port": "",
1865
"debug": "False",
1866
"priority":
1867
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1868
"servicename": "Mandos",
1869
"use_dbus": "True",
1870
"use_ipv6": "True",
1871
"debuglevel": "",
1872
}
1873
2879
1874
# Parse config file for server-global settings
2880
1875
server_config = configparser.SafeConfigParser(server_defaults)
2881
1876
del server_defaults
2882
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1877
server_config.read(os.path.join(options.configdir,
1878
"mandos.conf"))
2883
1879
# Convert the SafeConfigParser object to a dict
2884
1880
server_settings = server_config.defaults()
2885
1881
# Use the appropriate methods on the non-string config options
2886
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
1882
for option in ("debug", "use_dbus", "use_ipv6"):
2887
1883
server_settings[option] = server_config.getboolean("DEFAULT",
2888
1884
option)
2889
1885
if server_settings["port"]:
2890
1886
server_settings["port"] = server_config.getint("DEFAULT",
2891
1887
"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"])
2901
1888
del server_config
2902
1889
2903
1890
# Override the settings from the config file with command line
2904
1891
# options, if set.
2905
1892
for option in ("interface", "address", "port", "debug",
2906
"priority", "servicename", "configdir", "use_dbus",
2907
"use_ipv6", "debuglevel", "restore", "statedir",
2908
"socket", "foreground", "zeroconf"):
1893
"priority", "servicename", "configdir",
1894
"use_dbus", "use_ipv6", "debuglevel"):
2909
1895
value = getattr(options, option)
2910
1896
if value is not None:
2911
1897
server_settings[option] = value
2912
1898
del options
2913
1899
# Force all strings to be unicode
2914
1900
for option in server_settings.keys():
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
1901
if type(server_settings[option]) is str:
1902
server_settings[option] = unicode(server_settings[option])
2925
1903
# Now we have our good server settings in "server_settings"
2926
1904
2927
1905
##################################################################
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
1906
2934
1907
# For convenience
2935
1908
debug = server_settings["debug"]
2936
1909
debuglevel = server_settings["debuglevel"]
2937
1910
use_dbus = server_settings["use_dbus"]
2938
1911
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)
2952
1912
2953
1913
if server_settings["servicename"] != "Mandos":
2954
syslogger.setFormatter(
2955
logging.Formatter('Mandos ({}) [%(process)d]:'
2956
' %(levelname)s: %(message)s'.format(
2957
server_settings["servicename"])))
2958
1914
syslogger.setFormatter(logging.Formatter
1915
('Mandos (%s) [%%(process)d]:'
1916
' %%(levelname)s: %%(message)s'
1917
% server_settings["servicename"]))
1918
2959
1919
# Parse config file with clients
2960
client_config = configparser.SafeConfigParser(Client
2961
.client_defaults)
1920
client_defaults = { "timeout": "5m",
1921
"extended_timeout": "15m",
1922
"interval": "2m",
1923
"checker": "fping -q -- %%(host)s",
1924
"host": "",
1925
"approval_delay": "0s",
1926
"approval_duration": "1s",
1927
}
1928
client_config = configparser.SafeConfigParser(client_defaults)
2962
1929
client_config.read(os.path.join(server_settings["configdir"],
2963
1930
"clients.conf"))
2964
1931
2965
1932
global mandos_dbus_service
2966
1933
mandos_dbus_service = None
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
1934
1935
tcp_server = MandosServer((server_settings["address"],
1936
server_settings["port"]),
1937
ClientHandler,
1938
interface=(server_settings["interface"]
1939
or None),
1940
use_ipv6=use_ipv6,
1941
gnutls_priority=
1942
server_settings["priority"],
1943
use_dbus=use_dbus)
1944
if not debug:
1945
pidfilename = "/var/run/mandos.pid"
1946
try:
1947
pidfile = open(pidfilename, "w")
1948
except IOError:
1949
logger.error("Could not open file %r", pidfilename)
1950
1951
try:
1952
uid = pwd.getpwnam("_mandos").pw_uid
1953
gid = pwd.getpwnam("_mandos").pw_gid
1954
except KeyError:
1955
try:
1956
uid = pwd.getpwnam("mandos").pw_uid
1957
gid = pwd.getpwnam("mandos").pw_gid
2997
1958
except KeyError:
2998
continue
2999
else:
3000
uid = 65534
3001
gid = 65534
1959
try:
1960
uid = pwd.getpwnam("nobody").pw_uid
1961
gid = pwd.getpwnam("nobody").pw_gid
1962
except KeyError:
1963
uid = 65534
1964
gid = 65534
3002
1965
try:
3003
1966
os.setgid(gid)
3004
1967
os.setuid(uid)
3005
if debug:
3006
logger.debug("Did setuid/setgid to {}:{}".format(uid,
3007
gid))
3008
1968
except OSError as error:
3009
logger.warning("Failed to setuid/setgid to {}:{}: {}"
3010
.format(uid, gid, os.strerror(error.errno)))
3011
if error.errno != errno.EPERM:
3012
raise
3013
1969
if error[0] != errno.EPERM:
1970
raise error
1971
1972
if not debug and not debuglevel:
1973
syslogger.setLevel(logging.WARNING)
1974
console.setLevel(logging.WARNING)
1975
if debuglevel:
1976
level = getattr(logging, debuglevel.upper())
1977
syslogger.setLevel(level)
1978
console.setLevel(level)
1979
3014
1980
if debug:
3015
1981
# Enable all possible GnuTLS debugging
3016
1982
3017
1983
# "Use a log level over 10 to enable all debugging options."
3018
1984
# - GnuTLS manual
3019
gnutls.global_set_log_level(11)
3020
3021
@gnutls.log_func
1985
gnutls.library.functions.gnutls_global_set_log_level(11)
1986
1987
@gnutls.library.types.gnutls_log_func
3022
1988
def debug_gnutls(level, string):
3023
1989
logger.debug("GnuTLS: %s", string[:-1])
3024
3025
gnutls.global_set_log_function(debug_gnutls)
3026
1990
1991
(gnutls.library.functions
1992
.gnutls_global_set_log_function(debug_gnutls))
1993
3027
1994
# Redirect stdin so all checkers get /dev/null
3028
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1995
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
3029
1996
os.dup2(null, sys.stdin.fileno())
3030
1997
if null > 2:
3031
1998
os.close(null)
3032
1999
else:
2000
# No console logging
2001
logger.removeHandler(console)
2002
3033
2003
# Need to fork before connecting to D-Bus
3034
if not foreground:
2004
if not debug:
3035
2005
# Close all input and output, do double fork, etc.
3036
2006
daemon()
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
2007
3042
2008
global main_loop
3043
2009
# From the Avahi example code
3044
DBusGMainLoop(set_as_default=True)
3045
main_loop = GLib.MainLoop()
2010
DBusGMainLoop(set_as_default=True )
2011
main_loop = gobject.MainLoop()
3046
2012
bus = dbus.SystemBus()
3047
2013
# End of Avahi example code
3048
2014
if use_dbus:
3049
2015
try:
3050
2016
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)
2017
bus, do_not_queue=True)
2018
old_bus_name = (dbus.service.BusName
2019
("se.bsnet.fukt.Mandos", bus,
2020
do_not_queue=True))
2021
except dbus.exceptions.NameExistsException as e:
2022
logger.error(unicode(e) + ", disabling D-Bus")
3058
2023
use_dbus = False
3059
2024
server_settings["use_dbus"] = False
3060
2025
tcp_server.use_dbus = False
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
2026
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2027
service = AvahiService(name = server_settings["servicename"],
2028
servicetype = "_mandos._tcp",
2029
protocol = protocol, bus = bus)
2030
if server_settings["interface"]:
2031
service.interface = (if_nametoindex
2032
(str(server_settings["interface"])))
2033
3072
2034
global multiprocessing_manager
3073
2035
multiprocessing_manager = multiprocessing.Manager()
3074
2036
3075
2037
client_class = Client
3076
2038
if use_dbus:
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))
2039
client_class = functools.partial(ClientDBusTransitional,
2040
bus = bus)
2041
def client_config_items(config, section):
2042
special_settings = {
2043
"approved_by_default":
2044
lambda: config.getboolean(section,
2045
"approved_by_default"),
2046
}
2047
for name, value in config.items(section):
3205
2048
try:
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
2049
yield (name, special_settings[name]())
2050
except KeyError:
2051
yield (name, value)
2052
2053
tcp_server.clients.update(set(
2054
client_class(name = section,
2055
config= dict(client_config_items(
2056
client_config, section)))
2057
for section in client_config.sections()))
3231
2058
if not tcp_server.clients:
3232
2059
logger.warning("No clients defined")
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
2060
2061
if not debug:
2062
try:
2063
with pidfile:
2064
pid = os.getpid()
2065
pidfile.write(str(pid) + "\n".encode("utf-8"))
2066
del pidfile
2067
except IOError:
2068
logger.error("Could not write to file %r with PID %d",
2069
pidfilename, pid)
2070
except NameError:
2071
# "pidfile" was never created
2072
pass
3244
2073
del pidfilename
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
2074
2075
signal.signal(signal.SIGINT, signal.SIG_IGN)
2076
2077
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2078
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2079
3250
2080
if use_dbus:
3251
3252
@alternate_dbus_interfaces(
3253
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3254
class MandosDBusService(DBusObjectWithObjectManager):
2081
class MandosDBusService(dbus.service.Object):
3255
2082
"""A D-Bus proxy object"""
3256
3257
2083
def __init__(self):
3258
2084
dbus.service.Object.__init__(self, bus, "/")
3259
3260
2085
_interface = "se.recompile.Mandos"
3261
2086
3262
2087
@dbus.service.signal(_interface, signature="o")
3263
2088
def ClientAdded(self, objpath):
3264
2089
"D-Bus signal"
3265
2090
pass
3266
2091
3267
2092
@dbus.service.signal(_interface, signature="ss")
3268
2093
def ClientNotFound(self, fingerprint, address):
3269
2094
"D-Bus signal"
3270
2095
pass
3271
3272
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3273
"true"})
2096
3274
2097
@dbus.service.signal(_interface, signature="os")
3275
2098
def ClientRemoved(self, objpath, name):
3276
2099
"D-Bus signal"
3277
2100
pass
3278
3279
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3280
"true"})
2101
3281
2102
@dbus.service.method(_interface, out_signature="ao")
3282
2103
def GetAllClients(self):
3283
2104
"D-Bus method"
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"})
2105
return dbus.Array(c.dbus_object_path
2106
for c in tcp_server.clients)
2107
3289
2108
@dbus.service.method(_interface,
3290
2109
out_signature="a{oa{sv}}")
3291
2110
def GetAllClientsWithProperties(self):
3292
2111
"D-Bus method"
3293
2112
return dbus.Dictionary(
3294
{c.dbus_object_path: c.GetAll(
3295
"se.recompile.Mandos.Client")
3296
for c in tcp_server.clients.values()},
2113
((c.dbus_object_path, c.GetAll(""))
2114
for c in tcp_server.clients),
3297
2115
signature="oa{sv}")
3298
2116
3299
2117
@dbus.service.method(_interface, in_signature="o")
3300
2118
def RemoveClient(self, object_path):
3301
2119
"D-Bus method"
3302
for c in tcp_server.clients.values():
2120
for c in tcp_server.clients:
3303
2121
if c.dbus_object_path == object_path:
3304
del tcp_server.clients[c.name]
2122
tcp_server.clients.remove(c)
3305
2123
c.remove_from_connection()
3306
# Don't signal the disabling
2124
# Don't signal anything except ClientRemoved
3307
2125
c.disable(quiet=True)
3308
# Emit D-Bus signal for removal
3309
self.client_removed_signal(c)
2126
# Emit D-Bus signal
2127
self.ClientRemoved(object_path, c.name)
3310
2128
return
3311
2129
raise KeyError(object_path)
3312
2130
3313
2131
del _interface
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
3351
mandos_dbus_service = MandosDBusService()
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
2132
2133
class MandosDBusServiceTransitional(MandosDBusService):
2134
__metaclass__ = AlternateDBusNamesMetaclass
2135
mandos_dbus_service = MandosDBusServiceTransitional()
2136
3358
2137
def cleanup():
3359
2138
"Cleanup function; run on exit"
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
2139
service.cleanup()
2140
2141
multiprocessing.active_children()
3422
2142
while tcp_server.clients:
3423
name, client = tcp_server.clients.popitem()
2143
client = tcp_server.clients.pop()
3424
2144
if use_dbus:
3425
2145
client.remove_from_connection()
3426
# Don't signal the disabling
2146
client.disable_hook = None
2147
# Don't signal anything except ClientRemoved
3427
2148
client.disable(quiet=True)
3428
# Emit D-Bus signal for removal
3429
2149
if use_dbus:
3430
mandos_dbus_service.client_removed_signal(client)
3431
client_settings.clear()
3432
2150
# Emit D-Bus signal
2151
mandos_dbus_service.ClientRemoved(client
2152
.dbus_object_path,
2153
client.name)
2154
3433
2155
atexit.register(cleanup)
3434
3435
for client in tcp_server.clients.values():
2156
2157
for client in tcp_server.clients:
3436
2158
if use_dbus:
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
2159
# Emit D-Bus signal
2160
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2161
client.enable()
2162
3443
2163
tcp_server.enable()
3444
2164
tcp_server.server_activate()
3445
2165
3446
2166
# Find out what port we got
3447
if zeroconf:
3448
service.port = tcp_server.socket.getsockname()[1]
2167
service.port = tcp_server.socket.getsockname()[1]
3449
2168
if use_ipv6:
3450
2169
logger.info("Now listening on address %r, port %d,"
3451
" flowinfo %d, scope_id %d",
3452
*tcp_server.socket.getsockname())
2170
" flowinfo %d, scope_id %d"
2171
% tcp_server.socket.getsockname())
3453
2172
else: # IPv4
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
2173
logger.info("Now listening on address %r, port %d"
2174
% tcp_server.socket.getsockname())
2175
2176
#service.interface = tcp_server.socket.getsockname()[3]
2177
3459
2178
try:
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
2179
# From the Avahi example code
2180
try:
2181
service.activate()
2182
except dbus.exceptions.DBusException as error:
2183
logger.critical("DBusException: %s", error)
2184
cleanup()
2185
sys.exit(1)
2186
# End of Avahi example code
2187
2188
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2189
lambda *args, **kwargs:
2190
(tcp_server.handle_request
2191
(*args[2:], **kwargs) or True))
2192
3475
2193
logger.debug("Starting main loop")
3476
2194
main_loop.run()
3477
2195
except AvahiError as error:
3478
logger.critical("Avahi Error", exc_info=error)
2196
logger.critical("AvahiError: %s", error)
3479
2197
cleanup()
3480
2198
sys.exit(1)
3481
2199
except KeyboardInterrupt:
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0