To get this branch, use:
bzr branch
http://bzr.recompile.se/loggerhead/mandos/trunk
« back to all changes in this revision
Viewing changes to mandos
- browse files at revision 885
- compare with another revision
- download diff
- download tarball
- view history from revision 885
- Committer: Teddy Hogeborn
- Date: 2016-10-29 14:22:26 UTC
- Revision ID: teddy@recompile.se-20161029142226-n4s9d70tuk615pg1
Makefile: Clarify message when running client.
* Makefile (run-client): Clarify message.
* Makefile (run-client): Clarify message.
- files added:
- 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
4
# Mandos server - give out binary blobs to connecting clients.
5
#
5
#
6
6
# This program is partly derived from an example program for an Avahi
7
7
# service publisher, downloaded from
8
8
# <http://avahi.org/wiki/PythonPublishExample>. This includes the
9
9
# methods "add", "remove", "server_state_changed",
10
10
# "entry_group_state_changed", "cleanup", and "activate" in the
11
11
# "AvahiService" class, and some lines in "main".
12
#
12
#
13
13
# Everything else is
14
# Copyright © 2008-2011 Teddy Hogeborn
15
# Copyright © 2008-2011 Björn Påhlsson
16
#
14
# Copyright © 2008-2016 Teddy Hogeborn
15
# Copyright © 2008-2016 Björn Påhlsson
16
#
17
17
# This program is free software: you can redistribute it and/or modify
18
18
# it under the terms of the GNU General Public License as published by
19
19
# the Free Software Foundation, either version 3 of the License, or
23
23
# but WITHOUT ANY WARRANTY; without even the implied warranty of
24
24
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
25
25
# GNU General Public License for more details.
26
#
26
#
27
27
# You should have received a copy of the GNU General Public License
28
28
# along with this program. If not, see
29
29
# <http://www.gnu.org/licenses/>.
30
#
31
# Contact the authors at <mandos@fukt.bsnet.se>.
32
#
30
#
31
# Contact the authors at <mandos@recompile.se>.
32
#
33
33
34
34
from __future__ import (division, absolute_import, print_function,
35
35
unicode_literals)
36
36
37
import SocketServer as socketserver
37
try:
38
from future_builtins import *
39
except ImportError:
40
pass
41
42
try:
43
import SocketServer as socketserver
44
except ImportError:
45
import socketserver
38
46
import socket
39
47
import argparse
40
48
import datetime
41
49
import errno
42
import gnutls.crypto
43
import gnutls.connection
44
import gnutls.errors
45
import gnutls.library.functions
46
import gnutls.library.constants
47
import gnutls.library.types
48
import ConfigParser as configparser
50
try:
51
import ConfigParser as configparser
52
except ImportError:
53
import configparser
49
54
import sys
50
55
import re
51
56
import os
60
65
import struct
61
66
import fcntl
62
67
import functools
63
import cPickle as pickle
68
try:
69
import cPickle as pickle
70
except ImportError:
71
import pickle
64
72
import multiprocessing
73
import types
74
import binascii
75
import tempfile
76
import itertools
77
import collections
78
import codecs
65
79
66
80
import dbus
67
81
import dbus.service
68
import gobject
69
import avahi
82
from gi.repository import GLib
70
83
from dbus.mainloop.glib import DBusGMainLoop
71
84
import ctypes
72
85
import ctypes.util
73
86
import xml.dom.minidom
74
87
import inspect
75
88
89
# Try to find the value of SO_BINDTODEVICE:
76
90
try:
91
# This is where SO_BINDTODEVICE is in Python 3.3 (or 3.4?) and
92
# newer, and it is also the most natural place for it:
77
93
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
78
94
except AttributeError:
79
95
try:
96
# This is where SO_BINDTODEVICE was up to and including Python
97
# 2.6, and also 3.2:
80
98
from IN import SO_BINDTODEVICE
81
99
except ImportError:
82
SO_BINDTODEVICE = None
83
84
85
version = "1.3.0"
86
87
#logger = logging.getLogger('mandos')
88
logger = logging.Logger('mandos')
89
syslogger = (logging.handlers.SysLogHandler
90
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
91
address = str("/dev/log")))
92
syslogger.setFormatter(logging.Formatter
93
('Mandos [%(process)d]: %(levelname)s:'
94
' %(message)s'))
95
logger.addHandler(syslogger)
96
97
console = logging.StreamHandler()
98
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
99
' %(levelname)s:'
100
' %(message)s'))
101
logger.addHandler(console)
100
# In Python 2.7 it seems to have been removed entirely.
101
# Try running the C preprocessor:
102
try:
103
cc = subprocess.Popen(["cc", "--language=c", "-E",
104
"/dev/stdin"],
105
stdin=subprocess.PIPE,
106
stdout=subprocess.PIPE)
107
stdout = cc.communicate(
108
"#include <sys/socket.h>\nSO_BINDTODEVICE\n")[0]
109
SO_BINDTODEVICE = int(stdout.splitlines()[-1])
110
except (OSError, ValueError, IndexError):
111
# No value found
112
SO_BINDTODEVICE = None
113
114
if sys.version_info.major == 2:
115
str = unicode
116
117
version = "1.7.13"
118
stored_state_file = "clients.pickle"
119
120
logger = logging.getLogger()
121
syslogger = None
122
123
try:
124
if_nametoindex = ctypes.cdll.LoadLibrary(
125
ctypes.util.find_library("c")).if_nametoindex
126
except (OSError, AttributeError):
127
128
def if_nametoindex(interface):
129
"Get an interface index the hard way, i.e. using fcntl()"
130
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
131
with contextlib.closing(socket.socket()) as s:
132
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
133
struct.pack(b"16s16x", interface))
134
interface_index = struct.unpack("I", ifreq[16:20])[0]
135
return interface_index
136
137
138
def copy_function(func):
139
"""Make a copy of a function"""
140
if sys.version_info.major == 2:
141
return types.FunctionType(func.func_code,
142
func.func_globals,
143
func.func_name,
144
func.func_defaults,
145
func.func_closure)
146
else:
147
return types.FunctionType(func.__code__,
148
func.__globals__,
149
func.__name__,
150
func.__defaults__,
151
func.__closure__)
152
153
154
def initlogger(debug, level=logging.WARNING):
155
"""init logger and add loglevel"""
156
157
global syslogger
158
syslogger = (logging.handlers.SysLogHandler(
159
facility=logging.handlers.SysLogHandler.LOG_DAEMON,
160
address="/dev/log"))
161
syslogger.setFormatter(logging.Formatter
162
('Mandos [%(process)d]: %(levelname)s:'
163
' %(message)s'))
164
logger.addHandler(syslogger)
165
166
if debug:
167
console = logging.StreamHandler()
168
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
169
' [%(process)d]:'
170
' %(levelname)s:'
171
' %(message)s'))
172
logger.addHandler(console)
173
logger.setLevel(level)
174
175
176
class PGPError(Exception):
177
"""Exception if encryption/decryption fails"""
178
pass
179
180
181
class PGPEngine(object):
182
"""A simple class for OpenPGP symmetric encryption & decryption"""
183
184
def __init__(self):
185
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
186
self.gpg = "gpg"
187
try:
188
output = subprocess.check_output(["gpgconf"])
189
for line in output.splitlines():
190
name, text, path = line.split(b":")
191
if name == "gpg":
192
self.gpg = path
193
break
194
except OSError as e:
195
if e.errno != errno.ENOENT:
196
raise
197
self.gnupgargs = ['--batch',
198
'--homedir', self.tempdir,
199
'--force-mdc',
200
'--quiet']
201
# Only GPG version 1 has the --no-use-agent option.
202
if self.gpg == "gpg" or self.gpg.endswith("/gpg"):
203
self.gnupgargs.append("--no-use-agent")
204
205
def __enter__(self):
206
return self
207
208
def __exit__(self, exc_type, exc_value, traceback):
209
self._cleanup()
210
return False
211
212
def __del__(self):
213
self._cleanup()
214
215
def _cleanup(self):
216
if self.tempdir is not None:
217
# Delete contents of tempdir
218
for root, dirs, files in os.walk(self.tempdir,
219
topdown=False):
220
for filename in files:
221
os.remove(os.path.join(root, filename))
222
for dirname in dirs:
223
os.rmdir(os.path.join(root, dirname))
224
# Remove tempdir
225
os.rmdir(self.tempdir)
226
self.tempdir = None
227
228
def password_encode(self, password):
229
# Passphrase can not be empty and can not contain newlines or
230
# NUL bytes. So we prefix it and hex encode it.
231
encoded = b"mandos" + binascii.hexlify(password)
232
if len(encoded) > 2048:
233
# GnuPG can't handle long passwords, so encode differently
234
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
235
.replace(b"\n", b"\\n")
236
.replace(b"\0", b"\\x00"))
237
return encoded
238
239
def encrypt(self, data, password):
240
passphrase = self.password_encode(password)
241
with tempfile.NamedTemporaryFile(
242
dir=self.tempdir) as passfile:
243
passfile.write(passphrase)
244
passfile.flush()
245
proc = subprocess.Popen([self.gpg, '--symmetric',
246
'--passphrase-file',
247
passfile.name]
248
+ self.gnupgargs,
249
stdin=subprocess.PIPE,
250
stdout=subprocess.PIPE,
251
stderr=subprocess.PIPE)
252
ciphertext, err = proc.communicate(input=data)
253
if proc.returncode != 0:
254
raise PGPError(err)
255
return ciphertext
256
257
def decrypt(self, data, password):
258
passphrase = self.password_encode(password)
259
with tempfile.NamedTemporaryFile(
260
dir=self.tempdir) as passfile:
261
passfile.write(passphrase)
262
passfile.flush()
263
proc = subprocess.Popen([self.gpg, '--decrypt',
264
'--passphrase-file',
265
passfile.name]
266
+ self.gnupgargs,
267
stdin=subprocess.PIPE,
268
stdout=subprocess.PIPE,
269
stderr=subprocess.PIPE)
270
decrypted_plaintext, err = proc.communicate(input=data)
271
if proc.returncode != 0:
272
raise PGPError(err)
273
return decrypted_plaintext
274
275
276
# Pretend that we have an Avahi module
277
class Avahi(object):
278
"""This isn't so much a class as it is a module-like namespace.
279
It is instantiated once, and simulates having an Avahi module."""
280
IF_UNSPEC = -1 # avahi-common/address.h
281
PROTO_UNSPEC = -1 # avahi-common/address.h
282
PROTO_INET = 0 # avahi-common/address.h
283
PROTO_INET6 = 1 # avahi-common/address.h
284
DBUS_NAME = "org.freedesktop.Avahi"
285
DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"
286
DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"
287
DBUS_PATH_SERVER = "/"
288
289
def string_array_to_txt_array(self, t):
290
return dbus.Array((dbus.ByteArray(s.encode("utf-8"))
291
for s in t), signature="ay")
292
ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h
293
ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h
294
ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h
295
SERVER_INVALID = 0 # avahi-common/defs.h
296
SERVER_REGISTERING = 1 # avahi-common/defs.h
297
SERVER_RUNNING = 2 # avahi-common/defs.h
298
SERVER_COLLISION = 3 # avahi-common/defs.h
299
SERVER_FAILURE = 4 # avahi-common/defs.h
300
avahi = Avahi()
301
102
302
103
303
class AvahiError(Exception):
104
304
def __init__(self, value, *args, **kwargs):
105
305
self.value = value
106
super(AvahiError, self).__init__(value, *args, **kwargs)
107
def __unicode__(self):
108
return unicode(repr(self.value))
306
return super(AvahiError, self).__init__(value, *args,
307
**kwargs)
308
109
309
110
310
class AvahiServiceError(AvahiError):
111
311
pass
112
312
313
113
314
class AvahiGroupError(AvahiError):
114
315
pass
115
316
116
317
117
318
class AvahiService(object):
118
319
"""An Avahi (Zeroconf) service.
119
320
120
321
Attributes:
121
322
interface: integer; avahi.IF_UNSPEC or an interface index.
122
323
Used to optionally bind to the specified interface.
123
324
name: string; Example: 'Mandos'
124
325
type: string; Example: '_mandos._tcp'.
125
See <http://www.dns-sd.org/ServiceTypes.html>
326
See <https://www.iana.org/assignments/service-names-port-numbers>
126
327
port: integer; what port to announce
127
328
TXT: list of strings; TXT record for the service
128
329
domain: string; Domain to publish on, default to .local if empty.
134
335
server: D-Bus Server
135
336
bus: dbus.SystemBus()
136
337
"""
137
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
138
servicetype = None, port = None, TXT = None,
139
domain = "", host = "", max_renames = 32768,
140
protocol = avahi.PROTO_UNSPEC, bus = None):
338
339
def __init__(self,
340
interface=avahi.IF_UNSPEC,
341
name=None,
342
servicetype=None,
343
port=None,
344
TXT=None,
345
domain="",
346
host="",
347
max_renames=32768,
348
protocol=avahi.PROTO_UNSPEC,
349
bus=None):
141
350
self.interface = interface
142
351
self.name = name
143
352
self.type = servicetype
151
360
self.group = None # our entry group
152
361
self.server = None
153
362
self.bus = bus
154
def rename(self):
363
self.entry_group_state_changed_match = None
364
365
def rename(self, remove=True):
155
366
"""Derived from the Avahi example code"""
156
367
if self.rename_count >= self.max_renames:
157
368
logger.critical("No suitable Zeroconf service name found"
158
369
" after %i retries, exiting.",
159
370
self.rename_count)
160
371
raise AvahiServiceError("Too many renames")
161
self.name = unicode(self.server.GetAlternativeServiceName(self.name))
372
self.name = str(
373
self.server.GetAlternativeServiceName(self.name))
374
self.rename_count += 1
162
375
logger.info("Changing Zeroconf service name to %r ...",
163
376
self.name)
164
syslogger.setFormatter(logging.Formatter
165
('Mandos (%s) [%%(process)d]:'
166
' %%(levelname)s: %%(message)s'
167
% self.name))
168
self.remove()
377
if remove:
378
self.remove()
169
379
try:
170
380
self.add()
171
except dbus.exceptions.DBusException, error:
172
logger.critical("DBusException: %s", error)
173
self.cleanup()
174
os._exit(1)
175
self.rename_count += 1
381
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
176
391
def remove(self):
177
392
"""Derived from the Avahi example code"""
393
if self.entry_group_state_changed_match is not None:
394
self.entry_group_state_changed_match.remove()
395
self.entry_group_state_changed_match = None
178
396
if self.group is not None:
179
397
self.group.Reset()
398
180
399
def add(self):
181
400
"""Derived from the Avahi example code"""
401
self.remove()
182
402
if self.group is None:
183
403
self.group = dbus.Interface(
184
404
self.bus.get_object(avahi.DBUS_NAME,
185
405
self.server.EntryGroupNew()),
186
406
avahi.DBUS_INTERFACE_ENTRY_GROUP)
187
self.group.connect_to_signal('StateChanged',
188
self
189
.entry_group_state_changed)
407
self.entry_group_state_changed_match = (
408
self.group.connect_to_signal(
409
'StateChanged', self.entry_group_state_changed))
190
410
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
191
411
self.name, self.type)
192
412
self.group.AddService(
198
418
dbus.UInt16(self.port),
199
419
avahi.string_array_to_txt_array(self.TXT))
200
420
self.group.Commit()
421
201
422
def entry_group_state_changed(self, state, error):
202
423
"""Derived from the Avahi example code"""
203
424
logger.debug("Avahi entry group state change: %i", state)
204
425
205
426
if state == avahi.ENTRY_GROUP_ESTABLISHED:
206
427
logger.debug("Zeroconf service established.")
207
428
elif state == avahi.ENTRY_GROUP_COLLISION:
209
430
self.rename()
210
431
elif state == avahi.ENTRY_GROUP_FAILURE:
211
432
logger.critical("Avahi: Error in group state changed %s",
212
unicode(error))
213
raise AvahiGroupError("State changed: %s"
214
% unicode(error))
433
str(error))
434
raise AvahiGroupError("State changed: {!s}".format(error))
435
215
436
def cleanup(self):
216
437
"""Derived from the Avahi example code"""
217
438
if self.group is not None:
218
self.group.Free()
439
try:
440
self.group.Free()
441
except (dbus.exceptions.UnknownMethodException,
442
dbus.exceptions.DBusException):
443
pass
219
444
self.group = None
220
def server_state_changed(self, state):
445
self.remove()
446
447
def server_state_changed(self, state, error=None):
221
448
"""Derived from the Avahi example code"""
222
449
logger.debug("Avahi server state change: %i", state)
223
if state == avahi.SERVER_COLLISION:
224
logger.error("Zeroconf server name collision")
225
self.remove()
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
}
456
if state in bad_states:
457
if bad_states[state] is not None:
458
if error is None:
459
logger.error(bad_states[state])
460
else:
461
logger.error(bad_states[state] + ": %r", error)
462
self.cleanup()
226
463
elif state == avahi.SERVER_RUNNING:
227
self.add()
464
try:
465
self.add()
466
except dbus.exceptions.DBusException as error:
467
if (error.get_dbus_name()
468
== "org.freedesktop.Avahi.CollisionError"):
469
logger.info("Local Zeroconf service name"
470
" collision.")
471
return self.rename(remove=False)
472
else:
473
logger.critical("D-Bus Exception", exc_info=error)
474
self.cleanup()
475
os._exit(1)
476
else:
477
if error is None:
478
logger.debug("Unknown state: %r", state)
479
else:
480
logger.debug("Unknown state: %r: %r", state, error)
481
228
482
def activate(self):
229
483
"""Derived from the Avahi example code"""
230
484
if self.server is None:
231
485
self.server = dbus.Interface(
232
486
self.bus.get_object(avahi.DBUS_NAME,
233
avahi.DBUS_PATH_SERVER),
487
avahi.DBUS_PATH_SERVER,
488
follow_name_owner_changes=True),
234
489
avahi.DBUS_INTERFACE_SERVER)
235
490
self.server.connect_to_signal("StateChanged",
236
self.server_state_changed)
491
self.server_state_changed)
237
492
self.server_state_changed(self.server.GetState())
238
493
239
494
495
class AvahiServiceToSyslog(AvahiService):
496
def rename(self, *args, **kwargs):
497
"""Add the new name to the syslog messages"""
498
ret = AvahiService.rename(self, *args, **kwargs)
499
syslogger.setFormatter(logging.Formatter(
500
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
501
.format(self.name)))
502
return ret
503
504
505
# Pretend that we have a GnuTLS module
506
class GnuTLS(object):
507
"""This isn't so much a class as it is a module-like namespace.
508
It is instantiated once, and simulates having a GnuTLS module."""
509
510
library = ctypes.util.find_library("gnutls")
511
if library is None:
512
library = ctypes.util.find_library("gnutls-deb0")
513
_library = ctypes.cdll.LoadLibrary(library)
514
del library
515
_need_version = b"3.3.0"
516
517
def __init__(self):
518
# Need to use "self" here, since this method is called before
519
# the assignment to the "gnutls" global variable happens.
520
if self.check_version(self._need_version) is None:
521
raise self.Error("Needs GnuTLS {} or later"
522
.format(self._need_version))
523
524
# Unless otherwise indicated, the constants and types below are
525
# all from the gnutls/gnutls.h C header file.
526
527
# Constants
528
E_SUCCESS = 0
529
E_INTERRUPTED = -52
530
E_AGAIN = -28
531
CRT_OPENPGP = 2
532
CLIENT = 2
533
SHUT_RDWR = 0
534
CRD_CERTIFICATE = 1
535
E_NO_CERTIFICATE_FOUND = -49
536
OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
537
538
# Types
539
class session_int(ctypes.Structure):
540
_fields_ = []
541
session_t = ctypes.POINTER(session_int)
542
543
class certificate_credentials_st(ctypes.Structure):
544
_fields_ = []
545
certificate_credentials_t = ctypes.POINTER(
546
certificate_credentials_st)
547
certificate_type_t = ctypes.c_int
548
549
class datum_t(ctypes.Structure):
550
_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
551
('size', ctypes.c_uint)]
552
553
class openpgp_crt_int(ctypes.Structure):
554
_fields_ = []
555
openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
556
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
557
log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
558
credentials_type_t = ctypes.c_int
559
transport_ptr_t = ctypes.c_void_p
560
close_request_t = ctypes.c_int
561
562
# Exceptions
563
class Error(Exception):
564
# We need to use the class name "GnuTLS" here, since this
565
# exception might be raised from within GnuTLS.__init__,
566
# which is called before the assignment to the "gnutls"
567
# global variable has happened.
568
def __init__(self, message=None, code=None, args=()):
569
# Default usage is by a message string, but if a return
570
# code is passed, convert it to a string with
571
# gnutls.strerror()
572
self.code = code
573
if message is None and code is not None:
574
message = GnuTLS.strerror(code)
575
return super(GnuTLS.Error, self).__init__(
576
message, *args)
577
578
class CertificateSecurityError(Error):
579
pass
580
581
# Classes
582
class Credentials(object):
583
def __init__(self):
584
self._c_object = gnutls.certificate_credentials_t()
585
gnutls.certificate_allocate_credentials(
586
ctypes.byref(self._c_object))
587
self.type = gnutls.CRD_CERTIFICATE
588
589
def __del__(self):
590
gnutls.certificate_free_credentials(self._c_object)
591
592
class ClientSession(object):
593
def __init__(self, socket, credentials=None):
594
self._c_object = gnutls.session_t()
595
gnutls.init(ctypes.byref(self._c_object), gnutls.CLIENT)
596
gnutls.set_default_priority(self._c_object)
597
gnutls.transport_set_ptr(self._c_object, socket.fileno())
598
gnutls.handshake_set_private_extensions(self._c_object,
599
True)
600
self.socket = socket
601
if credentials is None:
602
credentials = gnutls.Credentials()
603
gnutls.credentials_set(self._c_object, credentials.type,
604
ctypes.cast(credentials._c_object,
605
ctypes.c_void_p))
606
self.credentials = credentials
607
608
def __del__(self):
609
gnutls.deinit(self._c_object)
610
611
def handshake(self):
612
return gnutls.handshake(self._c_object)
613
614
def send(self, data):
615
data = bytes(data)
616
data_len = len(data)
617
while data_len > 0:
618
data_len -= gnutls.record_send(self._c_object,
619
data[-data_len:],
620
data_len)
621
622
def bye(self):
623
return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
624
625
# Error handling functions
626
def _error_code(result):
627
"""A function to raise exceptions on errors, suitable
628
for the 'restype' attribute on ctypes functions"""
629
if result >= 0:
630
return result
631
if result == gnutls.E_NO_CERTIFICATE_FOUND:
632
raise gnutls.CertificateSecurityError(code=result)
633
raise gnutls.Error(code=result)
634
635
def _retry_on_error(result, func, arguments):
636
"""A function to retry on some errors, suitable
637
for the 'errcheck' attribute on ctypes functions"""
638
while result < 0:
639
if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
640
return _error_code(result)
641
result = func(*arguments)
642
return result
643
644
# Unless otherwise indicated, the function declarations below are
645
# all from the gnutls/gnutls.h C header file.
646
647
# Functions
648
priority_set_direct = _library.gnutls_priority_set_direct
649
priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
650
ctypes.POINTER(ctypes.c_char_p)]
651
priority_set_direct.restype = _error_code
652
653
init = _library.gnutls_init
654
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
655
init.restype = _error_code
656
657
set_default_priority = _library.gnutls_set_default_priority
658
set_default_priority.argtypes = [session_t]
659
set_default_priority.restype = _error_code
660
661
record_send = _library.gnutls_record_send
662
record_send.argtypes = [session_t, ctypes.c_void_p,
663
ctypes.c_size_t]
664
record_send.restype = ctypes.c_ssize_t
665
record_send.errcheck = _retry_on_error
666
667
certificate_allocate_credentials = (
668
_library.gnutls_certificate_allocate_credentials)
669
certificate_allocate_credentials.argtypes = [
670
ctypes.POINTER(certificate_credentials_t)]
671
certificate_allocate_credentials.restype = _error_code
672
673
certificate_free_credentials = (
674
_library.gnutls_certificate_free_credentials)
675
certificate_free_credentials.argtypes = [
676
certificate_credentials_t]
677
certificate_free_credentials.restype = None
678
679
handshake_set_private_extensions = (
680
_library.gnutls_handshake_set_private_extensions)
681
handshake_set_private_extensions.argtypes = [session_t,
682
ctypes.c_int]
683
handshake_set_private_extensions.restype = None
684
685
credentials_set = _library.gnutls_credentials_set
686
credentials_set.argtypes = [session_t, credentials_type_t,
687
ctypes.c_void_p]
688
credentials_set.restype = _error_code
689
690
strerror = _library.gnutls_strerror
691
strerror.argtypes = [ctypes.c_int]
692
strerror.restype = ctypes.c_char_p
693
694
certificate_type_get = _library.gnutls_certificate_type_get
695
certificate_type_get.argtypes = [session_t]
696
certificate_type_get.restype = _error_code
697
698
certificate_get_peers = _library.gnutls_certificate_get_peers
699
certificate_get_peers.argtypes = [session_t,
700
ctypes.POINTER(ctypes.c_uint)]
701
certificate_get_peers.restype = ctypes.POINTER(datum_t)
702
703
global_set_log_level = _library.gnutls_global_set_log_level
704
global_set_log_level.argtypes = [ctypes.c_int]
705
global_set_log_level.restype = None
706
707
global_set_log_function = _library.gnutls_global_set_log_function
708
global_set_log_function.argtypes = [log_func]
709
global_set_log_function.restype = None
710
711
deinit = _library.gnutls_deinit
712
deinit.argtypes = [session_t]
713
deinit.restype = None
714
715
handshake = _library.gnutls_handshake
716
handshake.argtypes = [session_t]
717
handshake.restype = _error_code
718
handshake.errcheck = _retry_on_error
719
720
transport_set_ptr = _library.gnutls_transport_set_ptr
721
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
722
transport_set_ptr.restype = None
723
724
bye = _library.gnutls_bye
725
bye.argtypes = [session_t, close_request_t]
726
bye.restype = _error_code
727
bye.errcheck = _retry_on_error
728
729
check_version = _library.gnutls_check_version
730
check_version.argtypes = [ctypes.c_char_p]
731
check_version.restype = ctypes.c_char_p
732
733
# All the function declarations below are from gnutls/openpgp.h
734
735
openpgp_crt_init = _library.gnutls_openpgp_crt_init
736
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
737
openpgp_crt_init.restype = _error_code
738
739
openpgp_crt_import = _library.gnutls_openpgp_crt_import
740
openpgp_crt_import.argtypes = [openpgp_crt_t,
741
ctypes.POINTER(datum_t),
742
openpgp_crt_fmt_t]
743
openpgp_crt_import.restype = _error_code
744
745
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
746
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
747
ctypes.POINTER(ctypes.c_uint)]
748
openpgp_crt_verify_self.restype = _error_code
749
750
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
751
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
752
openpgp_crt_deinit.restype = None
753
754
openpgp_crt_get_fingerprint = (
755
_library.gnutls_openpgp_crt_get_fingerprint)
756
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
757
ctypes.c_void_p,
758
ctypes.POINTER(
759
ctypes.c_size_t)]
760
openpgp_crt_get_fingerprint.restype = _error_code
761
762
# Remove non-public functions
763
del _error_code, _retry_on_error
764
# Create the global "gnutls" object, simulating a module
765
gnutls = GnuTLS()
766
767
768
def call_pipe(connection, # : multiprocessing.Connection
769
func, *args, **kwargs):
770
"""This function is meant to be called by multiprocessing.Process
771
772
This function runs func(*args, **kwargs), and writes the resulting
773
return value on the provided multiprocessing.Connection.
774
"""
775
connection.send(func(*args, **kwargs))
776
connection.close()
777
778
240
779
class Client(object):
241
780
"""A representation of a client host served by this server.
242
781
243
782
Attributes:
244
_approved: bool(); 'None' if not yet approved/disapproved
783
approved: bool(); 'None' if not yet approved/disapproved
245
784
approval_delay: datetime.timedelta(); Time to wait for approval
246
785
approval_duration: datetime.timedelta(); Duration of one approval
247
786
checker: subprocess.Popen(); a running checker process used
248
787
to see if the client lives.
249
788
'None' if no process is running.
250
checker_callback_tag: a gobject event source tag, or None
789
checker_callback_tag: a GLib event source tag, or None
251
790
checker_command: string; External command which is run to check
252
791
if client lives. %() expansions are done at
253
792
runtime with vars(self) as dict, so that for
254
793
instance %(name)s can be used in the command.
255
checker_initiator_tag: a gobject event source tag, or None
794
checker_initiator_tag: a GLib event source tag, or None
256
795
created: datetime.datetime(); (UTC) object creation
796
client_structure: Object describing what attributes a client has
797
and is used for storing the client at exit
257
798
current_checker_command: string; current running checker_command
258
disable_hook: If set, called by disable() as disable_hook(self)
259
disable_initiator_tag: a gobject event source tag, or None
799
disable_initiator_tag: a GLib event source tag, or None
260
800
enabled: bool()
261
801
fingerprint: string (40 or 32 hexadecimal digits); used to
262
802
uniquely identify the client
264
804
interval: datetime.timedelta(); How often to start a new checker
265
805
last_approval_request: datetime.datetime(); (UTC) or None
266
806
last_checked_ok: datetime.datetime(); (UTC) or None
267
last_enabled: datetime.datetime(); (UTC)
807
last_checker_status: integer between 0 and 255 reflecting exit
808
status of last checker. -1 reflects crashed
809
checker, -2 means no checker completed yet.
810
last_checker_signal: The signal which killed the last checker, if
811
last_checker_status is -1
812
last_enabled: datetime.datetime(); (UTC) or None
268
813
name: string; from the config file, used in log messages and
269
814
D-Bus identifiers
270
815
secret: bytestring; sent verbatim (over TLS) to client
271
816
timeout: datetime.timedelta(); How long from last_checked_ok
272
817
until this client is disabled
818
extended_timeout: extra long timeout when secret has been sent
273
819
runtime_expansions: Allowed attributes for runtime expansion.
820
expires: datetime.datetime(); time (UTC) when a client will be
821
disabled, or None
822
server_settings: The server_settings dict from main()
274
823
"""
275
824
276
825
runtime_expansions = ("approval_delay", "approval_duration",
277
"created", "enabled", "fingerprint",
278
"host", "interval", "last_checked_ok",
826
"created", "enabled", "expires",
827
"fingerprint", "host", "interval",
828
"last_approval_request", "last_checked_ok",
279
829
"last_enabled", "name", "timeout")
280
830
client_defaults = {
831
"timeout": "PT5M",
832
"extended_timeout": "PT15M",
833
"interval": "PT2M",
834
"checker": "fping -q -- %%(host)s",
835
"host": "",
836
"approval_delay": "PT0S",
837
"approval_duration": "PT1S",
838
"approved_by_default": "True",
839
"enabled": "True",
840
}
841
281
842
@staticmethod
282
def _timedelta_to_milliseconds(td):
283
"Convert a datetime.timedelta() to milliseconds"
284
return ((td.days * 24 * 60 * 60 * 1000)
285
+ (td.seconds * 1000)
286
+ (td.microseconds // 1000))
287
288
def timeout_milliseconds(self):
289
"Return the 'timeout' attribute in milliseconds"
290
return self._timedelta_to_milliseconds(self.timeout)
291
292
def interval_milliseconds(self):
293
"Return the 'interval' attribute in milliseconds"
294
return self._timedelta_to_milliseconds(self.interval)
295
296
def approval_delay_milliseconds(self):
297
return self._timedelta_to_milliseconds(self.approval_delay)
298
299
def __init__(self, name = None, disable_hook=None, config=None):
300
"""Note: the 'checker' key in 'config' sets the
301
'checker_command' attribute and *not* the 'checker'
302
attribute."""
843
def config_parser(config):
844
"""Construct a new dict of client settings of this form:
845
{ client_name: {setting_name: value, ...}, ...}
846
with exceptions for any special settings as defined above.
847
NOTE: Must be a pure function. Must return the same result
848
value given the same arguments.
849
"""
850
settings = {}
851
for client_name in config.sections():
852
section = dict(config.items(client_name))
853
client = settings[client_name] = {}
854
855
client["host"] = section["host"]
856
# Reformat values from string types to Python types
857
client["approved_by_default"] = config.getboolean(
858
client_name, "approved_by_default")
859
client["enabled"] = config.getboolean(client_name,
860
"enabled")
861
862
# Uppercase and remove spaces from fingerprint for later
863
# comparison purposes with return value from the
864
# fingerprint() function
865
client["fingerprint"] = (section["fingerprint"].upper()
866
.replace(" ", ""))
867
if "secret" in section:
868
client["secret"] = codecs.decode(section["secret"]
869
.encode("utf-8"),
870
"base64")
871
elif "secfile" in section:
872
with open(os.path.expanduser(os.path.expandvars
873
(section["secfile"])),
874
"rb") as secfile:
875
client["secret"] = secfile.read()
876
else:
877
raise TypeError("No secret or secfile for section {}"
878
.format(section))
879
client["timeout"] = string_to_delta(section["timeout"])
880
client["extended_timeout"] = string_to_delta(
881
section["extended_timeout"])
882
client["interval"] = string_to_delta(section["interval"])
883
client["approval_delay"] = string_to_delta(
884
section["approval_delay"])
885
client["approval_duration"] = string_to_delta(
886
section["approval_duration"])
887
client["checker_command"] = section["checker"]
888
client["last_approval_request"] = None
889
client["last_checked_ok"] = None
890
client["last_checker_status"] = -2
891
892
return settings
893
894
def __init__(self, settings, name=None, server_settings=None):
303
895
self.name = name
304
if config is None:
305
config = {}
896
if server_settings is None:
897
server_settings = {}
898
self.server_settings = server_settings
899
# adding all client settings
900
for setting, value in settings.items():
901
setattr(self, setting, value)
902
903
if self.enabled:
904
if not hasattr(self, "last_enabled"):
905
self.last_enabled = datetime.datetime.utcnow()
906
if not hasattr(self, "expires"):
907
self.expires = (datetime.datetime.utcnow()
908
+ self.timeout)
909
else:
910
self.last_enabled = None
911
self.expires = None
912
306
913
logger.debug("Creating client %r", self.name)
307
# Uppercase and remove spaces from fingerprint for later
308
# comparison purposes with return value from the fingerprint()
309
# function
310
self.fingerprint = (config["fingerprint"].upper()
311
.replace(" ", ""))
312
914
logger.debug(" Fingerprint: %s", self.fingerprint)
313
if "secret" in config:
314
self.secret = config["secret"].decode("base64")
315
elif "secfile" in config:
316
with open(os.path.expanduser(os.path.expandvars
317
(config["secfile"])),
318
"rb") as secfile:
319
self.secret = secfile.read()
320
else:
321
raise TypeError("No secret or secfile for client %s"
322
% self.name)
323
self.host = config.get("host", "")
324
self.created = datetime.datetime.utcnow()
325
self.enabled = False
326
self.last_approval_request = None
327
self.last_enabled = None
328
self.last_checked_ok = None
329
self.timeout = string_to_delta(config["timeout"])
330
self.interval = string_to_delta(config["interval"])
331
self.disable_hook = disable_hook
915
self.created = settings.get("created",
916
datetime.datetime.utcnow())
917
918
# attributes specific for this server instance
332
919
self.checker = None
333
920
self.checker_initiator_tag = None
334
921
self.disable_initiator_tag = None
335
922
self.checker_callback_tag = None
336
self.checker_command = config["checker"]
337
923
self.current_checker_command = None
338
self.last_connect = None
339
self._approved = None
340
self.approved_by_default = config.get("approved_by_default",
341
True)
924
self.approved = None
342
925
self.approvals_pending = 0
343
self.approval_delay = string_to_delta(
344
config["approval_delay"])
345
self.approval_duration = string_to_delta(
346
config["approval_duration"])
347
self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())
348
926
self.changedstate = multiprocessing_manager.Condition(
927
multiprocessing_manager.Lock())
928
self.client_structure = [attr
929
for attr in self.__dict__.keys()
930
if not attr.startswith("_")]
931
self.client_structure.append("client_structure")
932
933
for name, t in inspect.getmembers(
934
type(self), lambda obj: isinstance(obj, property)):
935
if not name.startswith("_"):
936
self.client_structure.append(name)
937
938
# Send notice to process children that client state has changed
349
939
def send_changedstate(self):
350
self.changedstate.acquire()
351
self.changedstate.notify_all()
352
self.changedstate.release()
353
940
with self.changedstate:
941
self.changedstate.notify_all()
942
354
943
def enable(self):
355
944
"""Start this client's checker and timeout hooks"""
356
945
if getattr(self, "enabled", False):
357
946
# Already enabled
358
947
return
359
self.send_changedstate()
948
self.expires = datetime.datetime.utcnow() + self.timeout
949
self.enabled = True
360
950
self.last_enabled = datetime.datetime.utcnow()
361
# Schedule a new checker to be started an 'interval' from now,
362
# and every interval from then on.
363
self.checker_initiator_tag = (gobject.timeout_add
364
(self.interval_milliseconds(),
365
self.start_checker))
366
# Schedule a disable() when 'timeout' has passed
367
self.disable_initiator_tag = (gobject.timeout_add
368
(self.timeout_milliseconds(),
369
self.disable))
370
self.enabled = True
371
# Also start a new checker *right now*.
372
self.start_checker()
373
951
self.init_checker()
952
self.send_changedstate()
953
374
954
def disable(self, quiet=True):
375
955
"""Disable this client."""
376
956
if not getattr(self, "enabled", False):
377
957
return False
378
958
if not quiet:
379
self.send_changedstate()
380
if not quiet:
381
959
logger.info("Disabling client %s", self.name)
382
if getattr(self, "disable_initiator_tag", False):
383
gobject.source_remove(self.disable_initiator_tag)
960
if getattr(self, "disable_initiator_tag", None) is not None:
961
GLib.source_remove(self.disable_initiator_tag)
384
962
self.disable_initiator_tag = None
385
if getattr(self, "checker_initiator_tag", False):
386
gobject.source_remove(self.checker_initiator_tag)
963
self.expires = None
964
if getattr(self, "checker_initiator_tag", None) is not None:
965
GLib.source_remove(self.checker_initiator_tag)
387
966
self.checker_initiator_tag = None
388
967
self.stop_checker()
389
if self.disable_hook:
390
self.disable_hook(self)
391
968
self.enabled = False
392
# Do not run this again if called by a gobject.timeout_add
969
if not quiet:
970
self.send_changedstate()
971
# Do not run this again if called by a GLib.timeout_add
393
972
return False
394
973
395
974
def __del__(self):
396
self.disable_hook = None
397
975
self.disable()
398
399
def checker_callback(self, pid, condition, command):
976
977
def init_checker(self):
978
# Schedule a new checker to be started an 'interval' from now,
979
# and every interval from then on.
980
if self.checker_initiator_tag is not None:
981
GLib.source_remove(self.checker_initiator_tag)
982
self.checker_initiator_tag = GLib.timeout_add(
983
int(self.interval.total_seconds() * 1000),
984
self.start_checker)
985
# Schedule a disable() when 'timeout' has passed
986
if self.disable_initiator_tag is not None:
987
GLib.source_remove(self.disable_initiator_tag)
988
self.disable_initiator_tag = GLib.timeout_add(
989
int(self.timeout.total_seconds() * 1000), self.disable)
990
# Also start a new checker *right now*.
991
self.start_checker()
992
993
def checker_callback(self, source, condition, connection,
994
command):
400
995
"""The checker has completed, so take appropriate actions."""
401
996
self.checker_callback_tag = None
402
997
self.checker = None
403
if os.WIFEXITED(condition):
404
exitstatus = os.WEXITSTATUS(condition)
405
if exitstatus == 0:
998
# Read return code from connection (see call_pipe)
999
returncode = connection.recv()
1000
connection.close()
1001
1002
if returncode >= 0:
1003
self.last_checker_status = returncode
1004
self.last_checker_signal = None
1005
if self.last_checker_status == 0:
406
1006
logger.info("Checker for %(name)s succeeded",
407
1007
vars(self))
408
1008
self.checked_ok()
409
1009
else:
410
logger.info("Checker for %(name)s failed",
411
vars(self))
1010
logger.info("Checker for %(name)s failed", vars(self))
412
1011
else:
1012
self.last_checker_status = -1
1013
self.last_checker_signal = -returncode
413
1014
logger.warning("Checker for %(name)s crashed?",
414
1015
vars(self))
415
1016
return False
1017
416
1018
def checked_ok(self):
417
"""Bump up the timeout for this client.
418
419
This should only be called when the client has been seen,
420
alive and well.
421
"""
1019
"""Assert that the client has been seen, alive and well."""
422
1020
self.last_checked_ok = datetime.datetime.utcnow()
423
gobject.source_remove(self.disable_initiator_tag)
424
self.disable_initiator_tag = (gobject.timeout_add
425
(self.timeout_milliseconds(),
426
self.disable))
427
1021
self.last_checker_status = 0
1022
self.last_checker_signal = None
1023
self.bump_timeout()
1024
1025
def bump_timeout(self, timeout=None):
1026
"""Bump up the timeout for this client."""
1027
if timeout is None:
1028
timeout = self.timeout
1029
if self.disable_initiator_tag is not None:
1030
GLib.source_remove(self.disable_initiator_tag)
1031
self.disable_initiator_tag = None
1032
if getattr(self, "enabled", False):
1033
self.disable_initiator_tag = GLib.timeout_add(
1034
int(timeout.total_seconds() * 1000), self.disable)
1035
self.expires = datetime.datetime.utcnow() + timeout
1036
428
1037
def need_approval(self):
429
1038
self.last_approval_request = datetime.datetime.utcnow()
430
1039
431
1040
def start_checker(self):
432
1041
"""Start a new checker subprocess if one is not running.
433
1042
434
1043
If a checker already exists, leave it running and do
435
1044
nothing."""
436
1045
# The reason for not killing a running checker is that if we
437
# did that, then if a checker (for some reason) started
438
# running slowly and taking more than 'interval' time, the
439
# client would inevitably timeout, since no checker would get
440
# a chance to run to completion. If we instead leave running
1046
# did that, and if a checker (for some reason) started running
1047
# slowly and taking more than 'interval' time, then the client
1048
# would inevitably timeout, since no checker would get a
1049
# chance to run to completion. If we instead leave running
441
1050
# checkers alone, the checker would have to take more time
442
1051
# than 'timeout' for the client to be disabled, which is as it
443
1052
# should be.
444
445
# If a checker exists, make sure it is not a zombie
446
try:
447
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
448
except (AttributeError, OSError), error:
449
if (isinstance(error, OSError)
450
and error.errno != errno.ECHILD):
451
raise error
452
else:
453
if pid:
454
logger.warning("Checker was a zombie")
455
gobject.source_remove(self.checker_callback_tag)
456
self.checker_callback(pid, status,
457
self.current_checker_command)
1053
1054
if self.checker is not None and not self.checker.is_alive():
1055
logger.warning("Checker was not alive; joining")
1056
self.checker.join()
1057
self.checker = None
458
1058
# Start a new checker if needed
459
1059
if self.checker is None:
1060
# Escape attributes for the shell
1061
escaped_attrs = {
1062
attr: re.escape(str(getattr(self, attr)))
1063
for attr in self.runtime_expansions}
460
1064
try:
461
# In case checker_command has exactly one % operator
462
command = self.checker_command % self.host
463
except TypeError:
464
# Escape attributes for the shell
465
escaped_attrs = dict(
466
(attr,
467
re.escape(unicode(str(getattr(self, attr, "")),
468
errors=
469
'replace')))
470
for attr in
471
self.runtime_expansions)
472
473
try:
474
command = self.checker_command % escaped_attrs
475
except TypeError, error:
476
logger.error('Could not format string "%s":'
477
' %s', self.checker_command, error)
478
return True # Try again later
1065
command = self.checker_command % escaped_attrs
1066
except TypeError as error:
1067
logger.error('Could not format string "%s"',
1068
self.checker_command,
1069
exc_info=error)
1070
return True # Try again later
479
1071
self.current_checker_command = command
480
try:
481
logger.info("Starting checker %r for %s",
482
command, self.name)
483
# We don't need to redirect stdout and stderr, since
484
# in normal mode, that is already done by daemon(),
485
# and in debug mode we don't want to. (Stdin is
486
# always replaced by /dev/null.)
487
self.checker = subprocess.Popen(command,
488
close_fds=True,
489
shell=True, cwd="/")
490
self.checker_callback_tag = (gobject.child_watch_add
491
(self.checker.pid,
492
self.checker_callback,
493
data=command))
494
# The checker may have completed before the gobject
495
# watch was added. Check for this.
496
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
497
if pid:
498
gobject.source_remove(self.checker_callback_tag)
499
self.checker_callback(pid, status, command)
500
except OSError, error:
501
logger.error("Failed to start subprocess: %s",
502
error)
503
# Re-run this periodically if run by gobject.timeout_add
1072
logger.info("Starting checker %r for %s", command,
1073
self.name)
1074
# We don't need to redirect stdout and stderr, since
1075
# in normal mode, that is already done by daemon(),
1076
# and in debug mode we don't want to. (Stdin is
1077
# always replaced by /dev/null.)
1078
# The exception is when not debugging but nevertheless
1079
# running in the foreground; use the previously
1080
# created wnull.
1081
popen_args = {"close_fds": True,
1082
"shell": True,
1083
"cwd": "/"}
1084
if (not self.server_settings["debug"]
1085
and self.server_settings["foreground"]):
1086
popen_args.update({"stdout": wnull,
1087
"stderr": wnull})
1088
pipe = multiprocessing.Pipe(duplex=False)
1089
self.checker = multiprocessing.Process(
1090
target=call_pipe,
1091
args=(pipe[1], subprocess.call, command),
1092
kwargs=popen_args)
1093
self.checker.start()
1094
self.checker_callback_tag = GLib.io_add_watch(
1095
pipe[0].fileno(), GLib.IO_IN,
1096
self.checker_callback, pipe[0], command)
1097
# Re-run this periodically if run by GLib.timeout_add
504
1098
return True
505
1099
506
1100
def stop_checker(self):
507
1101
"""Force the checker process, if any, to stop."""
508
1102
if self.checker_callback_tag:
509
gobject.source_remove(self.checker_callback_tag)
1103
GLib.source_remove(self.checker_callback_tag)
510
1104
self.checker_callback_tag = None
511
1105
if getattr(self, "checker", None) is None:
512
1106
return
513
1107
logger.debug("Stopping checker for %(name)s", vars(self))
514
try:
515
os.kill(self.checker.pid, signal.SIGTERM)
516
#time.sleep(0.5)
517
#if self.checker.poll() is None:
518
# os.kill(self.checker.pid, signal.SIGKILL)
519
except OSError, error:
520
if error.errno != errno.ESRCH: # No such process
521
raise
1108
self.checker.terminate()
522
1109
self.checker = None
523
1110
524
def dbus_service_property(dbus_interface, signature="v",
525
access="readwrite", byte_arrays=False):
1111
1112
def dbus_service_property(dbus_interface,
1113
signature="v",
1114
access="readwrite",
1115
byte_arrays=False):
526
1116
"""Decorators for marking methods of a DBusObjectWithProperties to
527
1117
become properties on the D-Bus.
528
1118
529
1119
The decorated method will be called with no arguments by "Get"
530
1120
and with one argument by "Set".
531
1121
532
1122
The parameters, where they are supported, are the same as
533
1123
dbus.service.method, except there is only "signature", since the
534
1124
type from Get() and the type sent to Set() is the same.
537
1127
# "Set" method, so we fail early here:
538
1128
if byte_arrays and signature != "ay":
539
1129
raise ValueError("Byte arrays not supported for non-'ay'"
540
" signature %r" % signature)
1130
" signature {!r}".format(signature))
1131
541
1132
def decorator(func):
542
1133
func._dbus_is_property = True
543
1134
func._dbus_interface = dbus_interface
546
1137
func._dbus_name = func.__name__
547
1138
if func._dbus_name.endswith("_dbus_property"):
548
1139
func._dbus_name = func._dbus_name[:-14]
549
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
550
return func
1140
func._dbus_get_args_options = {'byte_arrays': byte_arrays}
1141
return func
1142
1143
return decorator
1144
1145
1146
def dbus_interface_annotations(dbus_interface):
1147
"""Decorator for marking functions returning interface annotations
1148
1149
Usage:
1150
1151
@dbus_interface_annotations("org.example.Interface")
1152
def _foo(self): # Function name does not matter
1153
return {"org.freedesktop.DBus.Deprecated": "true",
1154
"org.freedesktop.DBus.Property.EmitsChangedSignal":
1155
"false"}
1156
"""
1157
1158
def decorator(func):
1159
func._dbus_is_interface = True
1160
func._dbus_interface = dbus_interface
1161
func._dbus_name = dbus_interface
1162
return func
1163
1164
return decorator
1165
1166
1167
def dbus_annotations(annotations):
1168
"""Decorator to annotate D-Bus methods, signals or properties
1169
Usage:
1170
1171
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
1172
"org.freedesktop.DBus.Property."
1173
"EmitsChangedSignal": "false"})
1174
@dbus_service_property("org.example.Interface", signature="b",
1175
access="r")
1176
def Property_dbus_property(self):
1177
return dbus.Boolean(False)
1178
1179
See also the DBusObjectWithAnnotations class.
1180
"""
1181
1182
def decorator(func):
1183
func._dbus_annotations = annotations
1184
return func
1185
551
1186
return decorator
552
1187
553
1188
554
1189
class DBusPropertyException(dbus.exceptions.DBusException):
555
1190
"""A base class for D-Bus property-related exceptions
556
1191
"""
557
def __unicode__(self):
558
return unicode(str(self))
1192
pass
559
1193
560
1194
561
1195
class DBusPropertyAccessException(DBusPropertyException):
570
1204
pass
571
1205
572
1206
573
class DBusObjectWithProperties(dbus.service.Object):
1207
class DBusObjectWithAnnotations(dbus.service.Object):
1208
"""A D-Bus object with annotations.
1209
1210
Classes inheriting from this can use the dbus_annotations
1211
decorator to add annotations to methods or signals.
1212
"""
1213
1214
@staticmethod
1215
def _is_dbus_thing(thing):
1216
"""Returns a function testing if an attribute is a D-Bus thing
1217
1218
If called like _is_dbus_thing("method") it returns a function
1219
suitable for use as predicate to inspect.getmembers().
1220
"""
1221
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
1222
False)
1223
1224
def _get_all_dbus_things(self, thing):
1225
"""Returns a generator of (name, attribute) pairs
1226
"""
1227
return ((getattr(athing.__get__(self), "_dbus_name", name),
1228
athing.__get__(self))
1229
for cls in self.__class__.__mro__
1230
for name, athing in
1231
inspect.getmembers(cls, self._is_dbus_thing(thing)))
1232
1233
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1234
out_signature="s",
1235
path_keyword='object_path',
1236
connection_keyword='connection')
1237
def Introspect(self, object_path, connection):
1238
"""Overloading of standard D-Bus method.
1239
1240
Inserts annotation tags on methods and signals.
1241
"""
1242
xmlstring = dbus.service.Object.Introspect(self, object_path,
1243
connection)
1244
try:
1245
document = xml.dom.minidom.parseString(xmlstring)
1246
1247
for if_tag in document.getElementsByTagName("interface"):
1248
# Add annotation tags
1249
for typ in ("method", "signal"):
1250
for tag in if_tag.getElementsByTagName(typ):
1251
annots = dict()
1252
for name, prop in (self.
1253
_get_all_dbus_things(typ)):
1254
if (name == tag.getAttribute("name")
1255
and prop._dbus_interface
1256
== if_tag.getAttribute("name")):
1257
annots.update(getattr(
1258
prop, "_dbus_annotations", {}))
1259
for name, value in annots.items():
1260
ann_tag = document.createElement(
1261
"annotation")
1262
ann_tag.setAttribute("name", name)
1263
ann_tag.setAttribute("value", value)
1264
tag.appendChild(ann_tag)
1265
# Add interface annotation tags
1266
for annotation, value in dict(
1267
itertools.chain.from_iterable(
1268
annotations().items()
1269
for name, annotations
1270
in self._get_all_dbus_things("interface")
1271
if name == if_tag.getAttribute("name")
1272
)).items():
1273
ann_tag = document.createElement("annotation")
1274
ann_tag.setAttribute("name", annotation)
1275
ann_tag.setAttribute("value", value)
1276
if_tag.appendChild(ann_tag)
1277
# Fix argument name for the Introspect method itself
1278
if (if_tag.getAttribute("name")
1279
== dbus.INTROSPECTABLE_IFACE):
1280
for cn in if_tag.getElementsByTagName("method"):
1281
if cn.getAttribute("name") == "Introspect":
1282
for arg in cn.getElementsByTagName("arg"):
1283
if (arg.getAttribute("direction")
1284
== "out"):
1285
arg.setAttribute("name",
1286
"xml_data")
1287
xmlstring = document.toxml("utf-8")
1288
document.unlink()
1289
except (AttributeError, xml.dom.DOMException,
1290
xml.parsers.expat.ExpatError) as error:
1291
logger.error("Failed to override Introspection method",
1292
exc_info=error)
1293
return xmlstring
1294
1295
1296
class DBusObjectWithProperties(DBusObjectWithAnnotations):
574
1297
"""A D-Bus object with properties.
575
1298
576
1299
Classes inheriting from this can use the dbus_service_property
577
1300
decorator to expose methods as D-Bus properties. It exposes the
578
1301
standard Get(), Set(), and GetAll() methods on the D-Bus.
579
1302
"""
580
581
@staticmethod
582
def _is_dbus_property(obj):
583
return getattr(obj, "_dbus_is_property", False)
584
585
def _get_all_dbus_properties(self):
586
"""Returns a generator of (name, attribute) pairs
587
"""
588
return ((prop._dbus_name, prop)
589
for name, prop in
590
inspect.getmembers(self, self._is_dbus_property))
591
1303
592
1304
def _get_dbus_property(self, interface_name, property_name):
593
1305
"""Returns a bound method if one exists which is a D-Bus
594
1306
property with the specified name and interface.
595
1307
"""
596
for name in (property_name,
597
property_name + "_dbus_property"):
598
prop = getattr(self, name, None)
599
if (prop is None
600
or not self._is_dbus_property(prop)
601
or prop._dbus_name != property_name
602
or (interface_name and prop._dbus_interface
603
and interface_name != prop._dbus_interface)):
604
continue
605
return prop
1308
for cls in self.__class__.__mro__:
1309
for name, value in inspect.getmembers(
1310
cls, self._is_dbus_thing("property")):
1311
if (value._dbus_name == property_name
1312
and value._dbus_interface == interface_name):
1313
return value.__get__(self)
1314
606
1315
# No such property
607
raise DBusPropertyNotFound(self.dbus_object_path + ":"
608
+ interface_name + "."
609
+ property_name)
610
611
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
1316
raise DBusPropertyNotFound("{}:{}.{}".format(
1317
self.dbus_object_path, interface_name, property_name))
1318
1319
@classmethod
1320
def _get_all_interface_names(cls):
1321
"""Get a sequence of all interfaces supported by an object"""
1322
return (name for name in set(getattr(getattr(x, attr),
1323
"_dbus_interface", None)
1324
for x in (inspect.getmro(cls))
1325
for attr in dir(x))
1326
if name is not None)
1327
1328
@dbus.service.method(dbus.PROPERTIES_IFACE,
1329
in_signature="ss",
612
1330
out_signature="v")
613
1331
def Get(self, interface_name, property_name):
614
1332
"""Standard D-Bus property Get() method, see D-Bus standard.
620
1338
if not hasattr(value, "variant_level"):
621
1339
return value
622
1340
return type(value)(value, variant_level=value.variant_level+1)
623
1341
624
1342
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
625
1343
def Set(self, interface_name, property_name, value):
626
1344
"""Standard D-Bus property Set() method, see D-Bus standard.
632
1350
# The byte_arrays option is not supported yet on
633
1351
# signatures other than "ay".
634
1352
if prop._dbus_signature != "ay":
635
raise ValueError
636
value = dbus.ByteArray(''.join(unichr(byte)
637
for byte in value))
1353
raise ValueError("Byte arrays not supported for non-"
1354
"'ay' signature {!r}"
1355
.format(prop._dbus_signature))
1356
value = dbus.ByteArray(b''.join(chr(byte)
1357
for byte in value))
638
1358
prop(value)
639
640
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
1359
1360
@dbus.service.method(dbus.PROPERTIES_IFACE,
1361
in_signature="s",
641
1362
out_signature="a{sv}")
642
1363
def GetAll(self, interface_name):
643
1364
"""Standard D-Bus property GetAll() method, see D-Bus
645
1366
646
1367
Note: Will not include properties with access="write".
647
1368
"""
648
all = {}
649
for name, prop in self._get_all_dbus_properties():
1369
properties = {}
1370
for name, prop in self._get_all_dbus_things("property"):
650
1371
if (interface_name
651
1372
and interface_name != prop._dbus_interface):
652
1373
# Interface non-empty but did not match
656
1377
continue
657
1378
value = prop()
658
1379
if not hasattr(value, "variant_level"):
659
all[name] = value
1380
properties[name] = value
660
1381
continue
661
all[name] = type(value)(value, variant_level=
662
value.variant_level+1)
663
return dbus.Dictionary(all, signature="sv")
664
1382
properties[name] = type(value)(
1383
value, variant_level=value.variant_level + 1)
1384
return dbus.Dictionary(properties, signature="sv")
1385
1386
@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
1387
def PropertiesChanged(self, interface_name, changed_properties,
1388
invalidated_properties):
1389
"""Standard D-Bus PropertiesChanged() signal, see D-Bus
1390
standard.
1391
"""
1392
pass
1393
665
1394
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
666
1395
out_signature="s",
667
1396
path_keyword='object_path',
668
1397
connection_keyword='connection')
669
1398
def Introspect(self, object_path, connection):
670
"""Standard D-Bus method, overloaded to insert property tags.
1399
"""Overloading of standard D-Bus method.
1400
1401
Inserts property tags and interface annotation tags.
671
1402
"""
672
xmlstring = dbus.service.Object.Introspect(self, object_path,
673
connection)
1403
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1404
object_path,
1405
connection)
674
1406
try:
675
1407
document = xml.dom.minidom.parseString(xmlstring)
1408
676
1409
def make_tag(document, name, prop):
677
1410
e = document.createElement("property")
678
1411
e.setAttribute("name", name)
679
1412
e.setAttribute("type", prop._dbus_signature)
680
1413
e.setAttribute("access", prop._dbus_access)
681
1414
return e
1415
682
1416
for if_tag in document.getElementsByTagName("interface"):
1417
# Add property tags
683
1418
for tag in (make_tag(document, name, prop)
684
1419
for name, prop
685
in self._get_all_dbus_properties()
1420
in self._get_all_dbus_things("property")
686
1421
if prop._dbus_interface
687
1422
== if_tag.getAttribute("name")):
688
1423
if_tag.appendChild(tag)
1424
# Add annotation tags for properties
1425
for tag in if_tag.getElementsByTagName("property"):
1426
annots = dict()
1427
for name, prop in self._get_all_dbus_things(
1428
"property"):
1429
if (name == tag.getAttribute("name")
1430
and prop._dbus_interface
1431
== if_tag.getAttribute("name")):
1432
annots.update(getattr(
1433
prop, "_dbus_annotations", {}))
1434
for name, value in annots.items():
1435
ann_tag = document.createElement(
1436
"annotation")
1437
ann_tag.setAttribute("name", name)
1438
ann_tag.setAttribute("value", value)
1439
tag.appendChild(ann_tag)
689
1440
# Add the names to the return values for the
690
1441
# "org.freedesktop.DBus.Properties" methods
691
1442
if (if_tag.getAttribute("name")
704
1455
xmlstring = document.toxml("utf-8")
705
1456
document.unlink()
706
1457
except (AttributeError, xml.dom.DOMException,
707
xml.parsers.expat.ExpatError), error:
708
logger.error("Failed to override Introspection method",
709
error)
710
return xmlstring
711
712
1458
xml.parsers.expat.ExpatError) as error:
1459
logger.error("Failed to override Introspection method",
1460
exc_info=error)
1461
return xmlstring
1462
1463
try:
1464
dbus.OBJECT_MANAGER_IFACE
1465
except AttributeError:
1466
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1467
1468
1469
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1470
"""A D-Bus object with an ObjectManager.
1471
1472
Classes inheriting from this exposes the standard
1473
GetManagedObjects call and the InterfacesAdded and
1474
InterfacesRemoved signals on the standard
1475
"org.freedesktop.DBus.ObjectManager" interface.
1476
1477
Note: No signals are sent automatically; they must be sent
1478
manually.
1479
"""
1480
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1481
out_signature="a{oa{sa{sv}}}")
1482
def GetManagedObjects(self):
1483
"""This function must be overridden"""
1484
raise NotImplementedError()
1485
1486
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1487
signature="oa{sa{sv}}")
1488
def InterfacesAdded(self, object_path, interfaces_and_properties):
1489
pass
1490
1491
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1492
def InterfacesRemoved(self, object_path, interfaces):
1493
pass
1494
1495
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1496
out_signature="s",
1497
path_keyword='object_path',
1498
connection_keyword='connection')
1499
def Introspect(self, object_path, connection):
1500
"""Overloading of standard D-Bus method.
1501
1502
Override return argument name of GetManagedObjects to be
1503
"objpath_interfaces_and_properties"
1504
"""
1505
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1506
object_path,
1507
connection)
1508
try:
1509
document = xml.dom.minidom.parseString(xmlstring)
1510
1511
for if_tag in document.getElementsByTagName("interface"):
1512
# Fix argument name for the GetManagedObjects method
1513
if (if_tag.getAttribute("name")
1514
== dbus.OBJECT_MANAGER_IFACE):
1515
for cn in if_tag.getElementsByTagName("method"):
1516
if (cn.getAttribute("name")
1517
== "GetManagedObjects"):
1518
for arg in cn.getElementsByTagName("arg"):
1519
if (arg.getAttribute("direction")
1520
== "out"):
1521
arg.setAttribute(
1522
"name",
1523
"objpath_interfaces"
1524
"_and_properties")
1525
xmlstring = document.toxml("utf-8")
1526
document.unlink()
1527
except (AttributeError, xml.dom.DOMException,
1528
xml.parsers.expat.ExpatError) as error:
1529
logger.error("Failed to override Introspection method",
1530
exc_info=error)
1531
return xmlstring
1532
1533
1534
def datetime_to_dbus(dt, variant_level=0):
1535
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1536
if dt is None:
1537
return dbus.String("", variant_level=variant_level)
1538
return dbus.String(dt.isoformat(), variant_level=variant_level)
1539
1540
1541
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1542
"""A class decorator; applied to a subclass of
1543
dbus.service.Object, it will add alternate D-Bus attributes with
1544
interface names according to the "alt_interface_names" mapping.
1545
Usage:
1546
1547
@alternate_dbus_interfaces({"org.example.Interface":
1548
"net.example.AlternateInterface"})
1549
class SampleDBusObject(dbus.service.Object):
1550
@dbus.service.method("org.example.Interface")
1551
def SampleDBusMethod():
1552
pass
1553
1554
The above "SampleDBusMethod" on "SampleDBusObject" will be
1555
reachable via two interfaces: "org.example.Interface" and
1556
"net.example.AlternateInterface", the latter of which will have
1557
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1558
"true", unless "deprecate" is passed with a False value.
1559
1560
This works for methods and signals, and also for D-Bus properties
1561
(from DBusObjectWithProperties) and interfaces (from the
1562
dbus_interface_annotations decorator).
1563
"""
1564
1565
def wrapper(cls):
1566
for orig_interface_name, alt_interface_name in (
1567
alt_interface_names.items()):
1568
attr = {}
1569
interface_names = set()
1570
# Go though all attributes of the class
1571
for attrname, attribute in inspect.getmembers(cls):
1572
# Ignore non-D-Bus attributes, and D-Bus attributes
1573
# with the wrong interface name
1574
if (not hasattr(attribute, "_dbus_interface")
1575
or not attribute._dbus_interface.startswith(
1576
orig_interface_name)):
1577
continue
1578
# Create an alternate D-Bus interface name based on
1579
# the current name
1580
alt_interface = attribute._dbus_interface.replace(
1581
orig_interface_name, alt_interface_name)
1582
interface_names.add(alt_interface)
1583
# Is this a D-Bus signal?
1584
if getattr(attribute, "_dbus_is_signal", False):
1585
# Extract the original non-method undecorated
1586
# function by black magic
1587
if sys.version_info.major == 2:
1588
nonmethod_func = (dict(
1589
zip(attribute.func_code.co_freevars,
1590
attribute.__closure__))
1591
["func"].cell_contents)
1592
else:
1593
nonmethod_func = (dict(
1594
zip(attribute.__code__.co_freevars,
1595
attribute.__closure__))
1596
["func"].cell_contents)
1597
# Create a new, but exactly alike, function
1598
# object, and decorate it to be a new D-Bus signal
1599
# with the alternate D-Bus interface name
1600
new_function = copy_function(nonmethod_func)
1601
new_function = (dbus.service.signal(
1602
alt_interface,
1603
attribute._dbus_signature)(new_function))
1604
# Copy annotations, if any
1605
try:
1606
new_function._dbus_annotations = dict(
1607
attribute._dbus_annotations)
1608
except AttributeError:
1609
pass
1610
1611
# Define a creator of a function to call both the
1612
# original and alternate functions, so both the
1613
# original and alternate signals gets sent when
1614
# the function is called
1615
def fixscope(func1, func2):
1616
"""This function is a scope container to pass
1617
func1 and func2 to the "call_both" function
1618
outside of its arguments"""
1619
1620
@functools.wraps(func2)
1621
def call_both(*args, **kwargs):
1622
"""This function will emit two D-Bus
1623
signals by calling func1 and func2"""
1624
func1(*args, **kwargs)
1625
func2(*args, **kwargs)
1626
# Make wrapper function look like a D-Bus
1627
# signal
1628
for name, attr in inspect.getmembers(func2):
1629
if name.startswith("_dbus_"):
1630
setattr(call_both, name, attr)
1631
1632
return call_both
1633
# Create the "call_both" function and add it to
1634
# the class
1635
attr[attrname] = fixscope(attribute, new_function)
1636
# Is this a D-Bus method?
1637
elif getattr(attribute, "_dbus_is_method", False):
1638
# Create a new, but exactly alike, function
1639
# object. Decorate it to be a new D-Bus method
1640
# with the alternate D-Bus interface name. Add it
1641
# to the class.
1642
attr[attrname] = (
1643
dbus.service.method(
1644
alt_interface,
1645
attribute._dbus_in_signature,
1646
attribute._dbus_out_signature)
1647
(copy_function(attribute)))
1648
# Copy annotations, if any
1649
try:
1650
attr[attrname]._dbus_annotations = dict(
1651
attribute._dbus_annotations)
1652
except AttributeError:
1653
pass
1654
# Is this a D-Bus property?
1655
elif getattr(attribute, "_dbus_is_property", False):
1656
# Create a new, but exactly alike, function
1657
# object, and decorate it to be a new D-Bus
1658
# property with the alternate D-Bus interface
1659
# name. Add it to the class.
1660
attr[attrname] = (dbus_service_property(
1661
alt_interface, attribute._dbus_signature,
1662
attribute._dbus_access,
1663
attribute._dbus_get_args_options
1664
["byte_arrays"])
1665
(copy_function(attribute)))
1666
# Copy annotations, if any
1667
try:
1668
attr[attrname]._dbus_annotations = dict(
1669
attribute._dbus_annotations)
1670
except AttributeError:
1671
pass
1672
# Is this a D-Bus interface?
1673
elif getattr(attribute, "_dbus_is_interface", False):
1674
# Create a new, but exactly alike, function
1675
# object. Decorate it to be a new D-Bus interface
1676
# with the alternate D-Bus interface name. Add it
1677
# to the class.
1678
attr[attrname] = (
1679
dbus_interface_annotations(alt_interface)
1680
(copy_function(attribute)))
1681
if deprecate:
1682
# Deprecate all alternate interfaces
1683
iname = "_AlternateDBusNames_interface_annotation{}"
1684
for interface_name in interface_names:
1685
1686
@dbus_interface_annotations(interface_name)
1687
def func(self):
1688
return {"org.freedesktop.DBus.Deprecated":
1689
"true"}
1690
# Find an unused name
1691
for aname in (iname.format(i)
1692
for i in itertools.count()):
1693
if aname not in attr:
1694
attr[aname] = func
1695
break
1696
if interface_names:
1697
# Replace the class with a new subclass of it with
1698
# methods, signals, etc. as created above.
1699
if sys.version_info.major == 2:
1700
cls = type(b"{}Alternate".format(cls.__name__),
1701
(cls, ), attr)
1702
else:
1703
cls = type("{}Alternate".format(cls.__name__),
1704
(cls, ), attr)
1705
return cls
1706
1707
return wrapper
1708
1709
1710
@alternate_dbus_interfaces({"se.recompile.Mandos":
1711
"se.bsnet.fukt.Mandos"})
713
1712
class ClientDBus(Client, DBusObjectWithProperties):
714
1713
"""A Client class using D-Bus
715
1714
716
1715
Attributes:
717
1716
dbus_object_path: dbus.ObjectPath
718
1717
bus: dbus.SystemBus()
719
1718
"""
720
1719
721
1720
runtime_expansions = (Client.runtime_expansions
722
+ ("dbus_object_path",))
723
1721
+ ("dbus_object_path", ))
1722
1723
_interface = "se.recompile.Mandos.Client"
1724
724
1725
# dbus.service.Object doesn't use super(), so we can't either.
725
726
def __init__(self, bus = None, *args, **kwargs):
727
self._approvals_pending = 0
1726
1727
def __init__(self, bus=None, *args, **kwargs):
728
1728
self.bus = bus
729
1729
Client.__init__(self, *args, **kwargs)
730
1730
# Only now, when this client is initialized, can it show up on
731
1731
# the D-Bus
732
client_object_name = unicode(self.name).translate(
1732
client_object_name = str(self.name).translate(
733
1733
{ord("."): ord("_"),
734
1734
ord("-"): ord("_")})
735
self.dbus_object_path = (dbus.ObjectPath
736
("/clients/" + client_object_name))
1735
self.dbus_object_path = dbus.ObjectPath(
1736
"/clients/" + client_object_name)
737
1737
DBusObjectWithProperties.__init__(self, self.bus,
738
1738
self.dbus_object_path)
739
740
def _get_approvals_pending(self):
741
return self._approvals_pending
742
def _set_approvals_pending(self, value):
743
old_value = self._approvals_pending
744
self._approvals_pending = value
745
bval = bool(value)
746
if (hasattr(self, "dbus_object_path")
747
and bval is not bool(old_value)):
748
dbus_bool = dbus.Boolean(bval, variant_level=1)
749
self.PropertyChanged(dbus.String("ApprovalPending"),
750
dbus_bool)
751
752
approvals_pending = property(_get_approvals_pending,
753
_set_approvals_pending)
754
del _get_approvals_pending, _set_approvals_pending
755
756
@staticmethod
757
def _datetime_to_dbus(dt, variant_level=0):
758
"""Convert a UTC datetime.datetime() to a D-Bus type."""
759
return dbus.String(dt.isoformat(),
760
variant_level=variant_level)
761
762
def enable(self):
763
oldstate = getattr(self, "enabled", False)
764
r = Client.enable(self)
765
if oldstate != self.enabled:
766
# Emit D-Bus signals
767
self.PropertyChanged(dbus.String("Enabled"),
768
dbus.Boolean(True, variant_level=1))
769
self.PropertyChanged(
770
dbus.String("LastEnabled"),
771
self._datetime_to_dbus(self.last_enabled,
772
variant_level=1))
773
return r
774
775
def disable(self, quiet = False):
776
oldstate = getattr(self, "enabled", False)
777
r = Client.disable(self, quiet=quiet)
778
if not quiet and oldstate != self.enabled:
779
# Emit D-Bus signal
780
self.PropertyChanged(dbus.String("Enabled"),
781
dbus.Boolean(False, variant_level=1))
782
return r
783
1739
1740
def notifychangeproperty(transform_func, dbus_name,
1741
type_func=lambda x: x,
1742
variant_level=1,
1743
invalidate_only=False,
1744
_interface=_interface):
1745
""" Modify a variable so that it's a property which announces
1746
its changes to DBus.
1747
1748
transform_fun: Function that takes a value and a variant_level
1749
and transforms it to a D-Bus type.
1750
dbus_name: D-Bus name of the variable
1751
type_func: Function that transform the value before sending it
1752
to the D-Bus. Default: no transform
1753
variant_level: D-Bus variant level. Default: 1
1754
"""
1755
attrname = "_{}".format(dbus_name)
1756
1757
def setter(self, value):
1758
if hasattr(self, "dbus_object_path"):
1759
if (not hasattr(self, attrname) or
1760
type_func(getattr(self, attrname, None))
1761
!= type_func(value)):
1762
if invalidate_only:
1763
self.PropertiesChanged(
1764
_interface, dbus.Dictionary(),
1765
dbus.Array((dbus_name, )))
1766
else:
1767
dbus_value = transform_func(
1768
type_func(value),
1769
variant_level=variant_level)
1770
self.PropertyChanged(dbus.String(dbus_name),
1771
dbus_value)
1772
self.PropertiesChanged(
1773
_interface,
1774
dbus.Dictionary({dbus.String(dbus_name):
1775
dbus_value}),
1776
dbus.Array())
1777
setattr(self, attrname, value)
1778
1779
return property(lambda self: getattr(self, attrname), setter)
1780
1781
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1782
approvals_pending = notifychangeproperty(dbus.Boolean,
1783
"ApprovalPending",
1784
type_func=bool)
1785
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1786
last_enabled = notifychangeproperty(datetime_to_dbus,
1787
"LastEnabled")
1788
checker = notifychangeproperty(
1789
dbus.Boolean, "CheckerRunning",
1790
type_func=lambda checker: checker is not None)
1791
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1792
"LastCheckedOK")
1793
last_checker_status = notifychangeproperty(dbus.Int16,
1794
"LastCheckerStatus")
1795
last_approval_request = notifychangeproperty(
1796
datetime_to_dbus, "LastApprovalRequest")
1797
approved_by_default = notifychangeproperty(dbus.Boolean,
1798
"ApprovedByDefault")
1799
approval_delay = notifychangeproperty(
1800
dbus.UInt64, "ApprovalDelay",
1801
type_func=lambda td: td.total_seconds() * 1000)
1802
approval_duration = notifychangeproperty(
1803
dbus.UInt64, "ApprovalDuration",
1804
type_func=lambda td: td.total_seconds() * 1000)
1805
host = notifychangeproperty(dbus.String, "Host")
1806
timeout = notifychangeproperty(
1807
dbus.UInt64, "Timeout",
1808
type_func=lambda td: td.total_seconds() * 1000)
1809
extended_timeout = notifychangeproperty(
1810
dbus.UInt64, "ExtendedTimeout",
1811
type_func=lambda td: td.total_seconds() * 1000)
1812
interval = notifychangeproperty(
1813
dbus.UInt64, "Interval",
1814
type_func=lambda td: td.total_seconds() * 1000)
1815
checker_command = notifychangeproperty(dbus.String, "Checker")
1816
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1817
invalidate_only=True)
1818
1819
del notifychangeproperty
1820
784
1821
def __del__(self, *args, **kwargs):
785
1822
try:
786
1823
self.remove_from_connection()
789
1826
if hasattr(DBusObjectWithProperties, "__del__"):
790
1827
DBusObjectWithProperties.__del__(self, *args, **kwargs)
791
1828
Client.__del__(self, *args, **kwargs)
792
793
def checker_callback(self, pid, condition, command,
794
*args, **kwargs):
795
self.checker_callback_tag = None
796
self.checker = None
797
# Emit D-Bus signal
798
self.PropertyChanged(dbus.String("CheckerRunning"),
799
dbus.Boolean(False, variant_level=1))
800
if os.WIFEXITED(condition):
801
exitstatus = os.WEXITSTATUS(condition)
1829
1830
def checker_callback(self, source, condition,
1831
connection, command, *args, **kwargs):
1832
ret = Client.checker_callback(self, source, condition,
1833
connection, command, *args,
1834
**kwargs)
1835
exitstatus = self.last_checker_status
1836
if exitstatus >= 0:
802
1837
# Emit D-Bus signal
803
1838
self.CheckerCompleted(dbus.Int16(exitstatus),
804
dbus.Int64(condition),
1839
# This is specific to GNU libC
1840
dbus.Int64(exitstatus << 8),
805
1841
dbus.String(command))
806
1842
else:
807
1843
# Emit D-Bus signal
808
1844
self.CheckerCompleted(dbus.Int16(-1),
809
dbus.Int64(condition),
1845
dbus.Int64(
1846
# This is specific to GNU libC
1847
(exitstatus << 8)
1848
| self.last_checker_signal),
810
1849
dbus.String(command))
811
812
return Client.checker_callback(self, pid, condition, command,
813
*args, **kwargs)
814
815
def checked_ok(self, *args, **kwargs):
816
r = Client.checked_ok(self, *args, **kwargs)
817
# Emit D-Bus signal
818
self.PropertyChanged(
819
dbus.String("LastCheckedOK"),
820
(self._datetime_to_dbus(self.last_checked_ok,
821
variant_level=1)))
822
return r
823
824
def need_approval(self, *args, **kwargs):
825
r = Client.need_approval(self, *args, **kwargs)
826
# Emit D-Bus signal
827
self.PropertyChanged(
828
dbus.String("LastApprovalRequest"),
829
(self._datetime_to_dbus(self.last_approval_request,
830
variant_level=1)))
831
return r
832
1850
return ret
1851
833
1852
def start_checker(self, *args, **kwargs):
834
old_checker = self.checker
835
if self.checker is not None:
836
old_checker_pid = self.checker.pid
837
else:
838
old_checker_pid = None
1853
old_checker_pid = getattr(self.checker, "pid", None)
839
1854
r = Client.start_checker(self, *args, **kwargs)
840
1855
# Only if new checker process was started
841
1856
if (self.checker is not None
842
1857
and old_checker_pid != self.checker.pid):
843
1858
# Emit D-Bus signal
844
1859
self.CheckerStarted(self.current_checker_command)
845
self.PropertyChanged(
846
dbus.String("CheckerRunning"),
847
dbus.Boolean(True, variant_level=1))
848
return r
849
850
def stop_checker(self, *args, **kwargs):
851
old_checker = getattr(self, "checker", None)
852
r = Client.stop_checker(self, *args, **kwargs)
853
if (old_checker is not None
854
and getattr(self, "checker", None) is None):
855
self.PropertyChanged(dbus.String("CheckerRunning"),
856
dbus.Boolean(False, variant_level=1))
857
1860
return r
858
1861
859
1862
def _reset_approved(self):
860
self._approved = None
1863
self.approved = None
861
1864
return False
862
1865
863
1866
def approve(self, value=True):
1867
self.approved = value
1868
GLib.timeout_add(int(self.approval_duration.total_seconds()
1869
* 1000), self._reset_approved)
864
1870
self.send_changedstate()
865
self._approved = value
866
gobject.timeout_add(self._timedelta_to_milliseconds
867
(self.approval_duration),
868
self._reset_approved)
869
870
871
## D-Bus methods, signals & properties
872
_interface = "se.bsnet.fukt.Mandos.Client"
873
874
## Signals
875
1871
1872
# D-Bus methods, signals & properties
1873
1874
# Interfaces
1875
1876
# Signals
1877
876
1878
# CheckerCompleted - signal
877
1879
@dbus.service.signal(_interface, signature="nxs")
878
1880
def CheckerCompleted(self, exitcode, waitstatus, command):
879
1881
"D-Bus signal"
880
1882
pass
881
1883
882
1884
# CheckerStarted - signal
883
1885
@dbus.service.signal(_interface, signature="s")
884
1886
def CheckerStarted(self, command):
885
1887
"D-Bus signal"
886
1888
pass
887
1889
888
1890
# PropertyChanged - signal
1891
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
889
1892
@dbus.service.signal(_interface, signature="sv")
890
1893
def PropertyChanged(self, property, value):
891
1894
"D-Bus signal"
892
1895
pass
893
1896
894
1897
# GotSecret - signal
895
1898
@dbus.service.signal(_interface)
896
1899
def GotSecret(self):
899
1902
server to mandos-client
900
1903
"""
901
1904
pass
902
1905
903
1906
# Rejected - signal
904
1907
@dbus.service.signal(_interface, signature="s")
905
1908
def Rejected(self, reason):
906
1909
"D-Bus signal"
907
1910
pass
908
1911
909
1912
# NeedApproval - signal
910
1913
@dbus.service.signal(_interface, signature="tb")
911
1914
def NeedApproval(self, timeout, default):
912
1915
"D-Bus signal"
913
1916
return self.need_approval()
914
915
## Methods
916
1917
1918
# Methods
1919
917
1920
# Approve - method
918
1921
@dbus.service.method(_interface, in_signature="b")
919
1922
def Approve(self, value):
920
1923
self.approve(value)
921
1924
922
1925
# CheckedOK - method
923
1926
@dbus.service.method(_interface)
924
1927
def CheckedOK(self):
925
return self.checked_ok()
926
1928
self.checked_ok()
1929
927
1930
# Enable - method
1931
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
928
1932
@dbus.service.method(_interface)
929
1933
def Enable(self):
930
1934
"D-Bus method"
931
1935
self.enable()
932
1936
933
1937
# StartChecker - method
1938
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
934
1939
@dbus.service.method(_interface)
935
1940
def StartChecker(self):
936
1941
"D-Bus method"
937
1942
self.start_checker()
938
1943
939
1944
# Disable - method
1945
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
940
1946
@dbus.service.method(_interface)
941
1947
def Disable(self):
942
1948
"D-Bus method"
943
1949
self.disable()
944
1950
945
1951
# StopChecker - method
1952
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
946
1953
@dbus.service.method(_interface)
947
1954
def StopChecker(self):
948
1955
self.stop_checker()
949
950
## Properties
951
1956
1957
# Properties
1958
952
1959
# ApprovalPending - property
953
1960
@dbus_service_property(_interface, signature="b", access="read")
954
1961
def ApprovalPending_dbus_property(self):
955
1962
return dbus.Boolean(bool(self.approvals_pending))
956
1963
957
1964
# ApprovedByDefault - property
958
@dbus_service_property(_interface, signature="b",
1965
@dbus_service_property(_interface,
1966
signature="b",
959
1967
access="readwrite")
960
1968
def ApprovedByDefault_dbus_property(self, value=None):
961
1969
if value is None: # get
962
1970
return dbus.Boolean(self.approved_by_default)
963
1971
self.approved_by_default = bool(value)
964
# Emit D-Bus signal
965
self.PropertyChanged(dbus.String("ApprovedByDefault"),
966
dbus.Boolean(value, variant_level=1))
967
1972
968
1973
# ApprovalDelay - property
969
@dbus_service_property(_interface, signature="t",
1974
@dbus_service_property(_interface,
1975
signature="t",
970
1976
access="readwrite")
971
1977
def ApprovalDelay_dbus_property(self, value=None):
972
1978
if value is None: # get
973
return dbus.UInt64(self.approval_delay_milliseconds())
1979
return dbus.UInt64(self.approval_delay.total_seconds()
1980
* 1000)
974
1981
self.approval_delay = datetime.timedelta(0, 0, 0, value)
975
# Emit D-Bus signal
976
self.PropertyChanged(dbus.String("ApprovalDelay"),
977
dbus.UInt64(value, variant_level=1))
978
1982
979
1983
# ApprovalDuration - property
980
@dbus_service_property(_interface, signature="t",
1984
@dbus_service_property(_interface,
1985
signature="t",
981
1986
access="readwrite")
982
1987
def ApprovalDuration_dbus_property(self, value=None):
983
1988
if value is None: # get
984
return dbus.UInt64(self._timedelta_to_milliseconds(
985
self.approval_duration))
1989
return dbus.UInt64(self.approval_duration.total_seconds()
1990
* 1000)
986
1991
self.approval_duration = datetime.timedelta(0, 0, 0, value)
987
# Emit D-Bus signal
988
self.PropertyChanged(dbus.String("ApprovalDuration"),
989
dbus.UInt64(value, variant_level=1))
990
1992
991
1993
# Name - property
1994
@dbus_annotations(
1995
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
992
1996
@dbus_service_property(_interface, signature="s", access="read")
993
1997
def Name_dbus_property(self):
994
1998
return dbus.String(self.name)
995
1999
996
2000
# Fingerprint - property
2001
@dbus_annotations(
2002
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
997
2003
@dbus_service_property(_interface, signature="s", access="read")
998
2004
def Fingerprint_dbus_property(self):
999
2005
return dbus.String(self.fingerprint)
1000
2006
1001
2007
# Host - property
1002
@dbus_service_property(_interface, signature="s",
2008
@dbus_service_property(_interface,
2009
signature="s",
1003
2010
access="readwrite")
1004
2011
def Host_dbus_property(self, value=None):
1005
2012
if value is None: # get
1006
2013
return dbus.String(self.host)
1007
self.host = value
1008
# Emit D-Bus signal
1009
self.PropertyChanged(dbus.String("Host"),
1010
dbus.String(value, variant_level=1))
1011
2014
self.host = str(value)
2015
1012
2016
# Created - property
2017
@dbus_annotations(
2018
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1013
2019
@dbus_service_property(_interface, signature="s", access="read")
1014
2020
def Created_dbus_property(self):
1015
return dbus.String(self._datetime_to_dbus(self.created))
1016
2021
return datetime_to_dbus(self.created)
2022
1017
2023
# LastEnabled - property
1018
2024
@dbus_service_property(_interface, signature="s", access="read")
1019
2025
def LastEnabled_dbus_property(self):
1020
if self.last_enabled is None:
1021
return dbus.String("")
1022
return dbus.String(self._datetime_to_dbus(self.last_enabled))
1023
2026
return datetime_to_dbus(self.last_enabled)
2027
1024
2028
# Enabled - property
1025
@dbus_service_property(_interface, signature="b",
2029
@dbus_service_property(_interface,
2030
signature="b",
1026
2031
access="readwrite")
1027
2032
def Enabled_dbus_property(self, value=None):
1028
2033
if value is None: # get
1031
2036
self.enable()
1032
2037
else:
1033
2038
self.disable()
1034
2039
1035
2040
# LastCheckedOK - property
1036
@dbus_service_property(_interface, signature="s",
2041
@dbus_service_property(_interface,
2042
signature="s",
1037
2043
access="readwrite")
1038
2044
def LastCheckedOK_dbus_property(self, value=None):
1039
2045
if value is not None:
1040
2046
self.checked_ok()
1041
2047
return
1042
if self.last_checked_ok is None:
1043
return dbus.String("")
1044
return dbus.String(self._datetime_to_dbus(self
1045
.last_checked_ok))
1046
2048
return datetime_to_dbus(self.last_checked_ok)
2049
2050
# LastCheckerStatus - property
2051
@dbus_service_property(_interface, signature="n", access="read")
2052
def LastCheckerStatus_dbus_property(self):
2053
return dbus.Int16(self.last_checker_status)
2054
2055
# Expires - property
2056
@dbus_service_property(_interface, signature="s", access="read")
2057
def Expires_dbus_property(self):
2058
return datetime_to_dbus(self.expires)
2059
1047
2060
# LastApprovalRequest - property
1048
2061
@dbus_service_property(_interface, signature="s", access="read")
1049
2062
def LastApprovalRequest_dbus_property(self):
1050
if self.last_approval_request is None:
1051
return dbus.String("")
1052
return dbus.String(self.
1053
_datetime_to_dbus(self
1054
.last_approval_request))
1055
2063
return datetime_to_dbus(self.last_approval_request)
2064
1056
2065
# Timeout - property
1057
@dbus_service_property(_interface, signature="t",
2066
@dbus_service_property(_interface,
2067
signature="t",
1058
2068
access="readwrite")
1059
2069
def Timeout_dbus_property(self, value=None):
1060
2070
if value is None: # get
1061
return dbus.UInt64(self.timeout_milliseconds())
2071
return dbus.UInt64(self.timeout.total_seconds() * 1000)
2072
old_timeout = self.timeout
1062
2073
self.timeout = datetime.timedelta(0, 0, 0, value)
1063
# Emit D-Bus signal
1064
self.PropertyChanged(dbus.String("Timeout"),
1065
dbus.UInt64(value, variant_level=1))
1066
if getattr(self, "disable_initiator_tag", None) is None:
1067
return
1068
# Reschedule timeout
1069
gobject.source_remove(self.disable_initiator_tag)
1070
self.disable_initiator_tag = None
1071
time_to_die = (self.
1072
_timedelta_to_milliseconds((self
1073
.last_checked_ok
1074
+ self.timeout)
1075
- datetime.datetime
1076
.utcnow()))
1077
if time_to_die <= 0:
1078
# The timeout has passed
1079
self.disable()
1080
else:
1081
self.disable_initiator_tag = (gobject.timeout_add
1082
(time_to_die, self.disable))
1083
2074
# Reschedule disabling
2075
if self.enabled:
2076
now = datetime.datetime.utcnow()
2077
self.expires += self.timeout - old_timeout
2078
if self.expires <= now:
2079
# The timeout has passed
2080
self.disable()
2081
else:
2082
if (getattr(self, "disable_initiator_tag", None)
2083
is None):
2084
return
2085
GLib.source_remove(self.disable_initiator_tag)
2086
self.disable_initiator_tag = GLib.timeout_add(
2087
int((self.expires - now).total_seconds() * 1000),
2088
self.disable)
2089
2090
# ExtendedTimeout - property
2091
@dbus_service_property(_interface,
2092
signature="t",
2093
access="readwrite")
2094
def ExtendedTimeout_dbus_property(self, value=None):
2095
if value is None: # get
2096
return dbus.UInt64(self.extended_timeout.total_seconds()
2097
* 1000)
2098
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
2099
1084
2100
# Interval - property
1085
@dbus_service_property(_interface, signature="t",
2101
@dbus_service_property(_interface,
2102
signature="t",
1086
2103
access="readwrite")
1087
2104
def Interval_dbus_property(self, value=None):
1088
2105
if value is None: # get
1089
return dbus.UInt64(self.interval_milliseconds())
2106
return dbus.UInt64(self.interval.total_seconds() * 1000)
1090
2107
self.interval = datetime.timedelta(0, 0, 0, value)
1091
# Emit D-Bus signal
1092
self.PropertyChanged(dbus.String("Interval"),
1093
dbus.UInt64(value, variant_level=1))
1094
2108
if getattr(self, "checker_initiator_tag", None) is None:
1095
2109
return
1096
# Reschedule checker run
1097
gobject.source_remove(self.checker_initiator_tag)
1098
self.checker_initiator_tag = (gobject.timeout_add
1099
(value, self.start_checker))
1100
self.start_checker() # Start one now, too
2110
if self.enabled:
2111
# Reschedule checker run
2112
GLib.source_remove(self.checker_initiator_tag)
2113
self.checker_initiator_tag = GLib.timeout_add(
2114
value, self.start_checker)
2115
self.start_checker() # Start one now, too
1101
2116
1102
2117
# Checker - property
1103
@dbus_service_property(_interface, signature="s",
2118
@dbus_service_property(_interface,
2119
signature="s",
1104
2120
access="readwrite")
1105
2121
def Checker_dbus_property(self, value=None):
1106
2122
if value is None: # get
1107
2123
return dbus.String(self.checker_command)
1108
self.checker_command = value
1109
# Emit D-Bus signal
1110
self.PropertyChanged(dbus.String("Checker"),
1111
dbus.String(self.checker_command,
1112
variant_level=1))
1113
2124
self.checker_command = str(value)
2125
1114
2126
# CheckerRunning - property
1115
@dbus_service_property(_interface, signature="b",
2127
@dbus_service_property(_interface,
2128
signature="b",
1116
2129
access="readwrite")
1117
2130
def CheckerRunning_dbus_property(self, value=None):
1118
2131
if value is None: # get
1121
2134
self.start_checker()
1122
2135
else:
1123
2136
self.stop_checker()
1124
2137
1125
2138
# ObjectPath - property
2139
@dbus_annotations(
2140
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
2141
"org.freedesktop.DBus.Deprecated": "true"})
1126
2142
@dbus_service_property(_interface, signature="o", access="read")
1127
2143
def ObjectPath_dbus_property(self):
1128
return self.dbus_object_path # is already a dbus.ObjectPath
1129
2144
return self.dbus_object_path # is already a dbus.ObjectPath
2145
1130
2146
# Secret = property
1131
@dbus_service_property(_interface, signature="ay",
1132
access="write", byte_arrays=True)
2147
@dbus_annotations(
2148
{"org.freedesktop.DBus.Property.EmitsChangedSignal":
2149
"invalidates"})
2150
@dbus_service_property(_interface,
2151
signature="ay",
2152
access="write",
2153
byte_arrays=True)
1133
2154
def Secret_dbus_property(self, value):
1134
self.secret = str(value)
1135
2155
self.secret = bytes(value)
2156
1136
2157
del _interface
1137
2158
1138
2159
1141
2162
self._pipe = child_pipe
1142
2163
self._pipe.send(('init', fpr, address))
1143
2164
if not self._pipe.recv():
1144
raise KeyError()
2165
raise KeyError(fpr)
1145
2166
1146
2167
def __getattribute__(self, name):
1147
if(name == '_pipe'):
2168
if name == '_pipe':
1148
2169
return super(ProxyClient, self).__getattribute__(name)
1149
2170
self._pipe.send(('getattr', name))
1150
2171
data = self._pipe.recv()
1151
2172
if data[0] == 'data':
1152
2173
return data[1]
1153
2174
if data[0] == 'function':
2175
1154
2176
def func(*args, **kwargs):
1155
2177
self._pipe.send(('funcall', name, args, kwargs))
1156
2178
return self._pipe.recv()[1]
2179
1157
2180
return func
1158
2181
1159
2182
def __setattr__(self, name, value):
1160
if(name == '_pipe'):
2183
if name == '_pipe':
1161
2184
return super(ProxyClient, self).__setattr__(name, value)
1162
2185
self._pipe.send(('setattr', name, value))
1163
2186
1164
2187
1165
2188
class ClientHandler(socketserver.BaseRequestHandler, object):
1166
2189
"""A class to handle client connections.
1167
2190
1168
2191
Instantiated once for each connection to handle it.
1169
2192
Note: This will run in its own forked process."""
1170
2193
1171
2194
def handle(self):
1172
2195
with contextlib.closing(self.server.child_pipe) as child_pipe:
1173
2196
logger.info("TCP connection from: %s",
1174
unicode(self.client_address))
2197
str(self.client_address))
1175
2198
logger.debug("Pipe FD: %d",
1176
2199
self.server.child_pipe.fileno())
1177
2200
1178
session = (gnutls.connection
1179
.ClientSession(self.request,
1180
gnutls.connection
1181
.X509Credentials()))
1182
1183
# Note: gnutls.connection.X509Credentials is really a
1184
# generic GnuTLS certificate credentials object so long as
1185
# no X.509 keys are added to it. Therefore, we can use it
1186
# here despite using OpenPGP certificates.
1187
1188
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1189
# "+AES-256-CBC", "+SHA1",
1190
# "+COMP-NULL", "+CTYPE-OPENPGP",
1191
# "+DHE-DSS"))
2201
session = gnutls.ClientSession(self.request)
2202
2203
# priority = ':'.join(("NONE", "+VERS-TLS1.1",
2204
# "+AES-256-CBC", "+SHA1",
2205
# "+COMP-NULL", "+CTYPE-OPENPGP",
2206
# "+DHE-DSS"))
1192
2207
# Use a fallback default, since this MUST be set.
1193
2208
priority = self.server.gnutls_priority
1194
2209
if priority is None:
1195
2210
priority = "NORMAL"
1196
(gnutls.library.functions
1197
.gnutls_priority_set_direct(session._c_object,
1198
priority, None))
2211
gnutls.priority_set_direct(session._c_object,
2212
priority.encode("utf-8"),
2213
None)
1199
2214
1200
2215
# Start communication using the Mandos protocol
1201
2216
# Get protocol number
1203
2218
logger.debug("Protocol version: %r", line)
1204
2219
try:
1205
2220
if int(line.strip().split()[0]) > 1:
1206
raise RuntimeError
1207
except (ValueError, IndexError, RuntimeError), error:
2221
raise RuntimeError(line)
2222
except (ValueError, IndexError, RuntimeError) as error:
1208
2223
logger.error("Unknown protocol version: %s", error)
1209
2224
return
1210
2225
1211
2226
# Start GnuTLS connection
1212
2227
try:
1213
2228
session.handshake()
1214
except gnutls.errors.GNUTLSError, error:
2229
except gnutls.Error as error:
1215
2230
logger.warning("Handshake failed: %s", error)
1216
2231
# Do not run session.bye() here: the session is not
1217
2232
# established. Just abandon the request.
1221
2236
approval_required = False
1222
2237
try:
1223
2238
try:
1224
fpr = self.fingerprint(self.peer_certificate
1225
(session))
1226
except (TypeError, gnutls.errors.GNUTLSError), error:
2239
fpr = self.fingerprint(
2240
self.peer_certificate(session))
2241
except (TypeError, gnutls.Error) as error:
1227
2242
logger.warning("Bad certificate: %s", error)
1228
2243
return
1229
2244
logger.debug("Fingerprint: %s", fpr)
1233
2248
self.client_address)
1234
2249
except KeyError:
1235
2250
return
1236
2251
1237
2252
if client.approval_delay:
1238
2253
delay = client.approval_delay
1239
2254
client.approvals_pending += 1
1240
2255
approval_required = True
1241
2256
1242
2257
while True:
1243
2258
if not client.enabled:
1244
logger.warning("Client %s is disabled",
1245
client.name)
2259
logger.info("Client %s is disabled",
2260
client.name)
1246
2261
if self.server.use_dbus:
1247
2262
# Emit D-Bus signal
1248
client.Rejected("Disabled")
2263
client.Rejected("Disabled")
1249
2264
return
1250
1251
if client._approved or not client.approval_delay:
1252
#We are approved or approval is disabled
2265
2266
if client.approved or not client.approval_delay:
2267
# We are approved or approval is disabled
1253
2268
break
1254
elif client._approved is None:
2269
elif client.approved is None:
1255
2270
logger.info("Client %s needs approval",
1256
2271
client.name)
1257
2272
if self.server.use_dbus:
1258
2273
# Emit D-Bus signal
1259
2274
client.NeedApproval(
1260
client.approval_delay_milliseconds(),
1261
client.approved_by_default)
2275
client.approval_delay.total_seconds()
2276
* 1000, client.approved_by_default)
1262
2277
else:
1263
2278
logger.warning("Client %s was not approved",
1264
2279
client.name)
1266
2281
# Emit D-Bus signal
1267
2282
client.Rejected("Denied")
1268
2283
return
1269
1270
#wait until timeout or approved
1271
#x = float(client._timedelta_to_milliseconds(delay))
2284
2285
# wait until timeout or approved
1272
2286
time = datetime.datetime.now()
1273
2287
client.changedstate.acquire()
1274
client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))
2288
client.changedstate.wait(delay.total_seconds())
1275
2289
client.changedstate.release()
1276
2290
time2 = datetime.datetime.now()
1277
2291
if (time2 - time) >= delay:
1287
2301
break
1288
2302
else:
1289
2303
delay -= time2 - time
1290
1291
sent_size = 0
1292
while sent_size < len(client.secret):
1293
try:
1294
sent = session.send(client.secret[sent_size:])
1295
except (gnutls.errors.GNUTLSError), error:
1296
logger.warning("gnutls send failed")
1297
return
1298
logger.debug("Sent: %d, remaining: %d",
1299
sent, len(client.secret)
1300
- (sent_size + sent))
1301
sent_size += sent
2304
2305
try:
2306
session.send(client.secret)
2307
except gnutls.Error as error:
2308
logger.warning("gnutls send failed",
2309
exc_info=error)
2310
return
1302
2311
1303
2312
logger.info("Sending secret to %s", client.name)
1304
# bump the timeout as if seen
1305
client.checked_ok()
2313
# bump the timeout using extended_timeout
2314
client.bump_timeout(client.extended_timeout)
1306
2315
if self.server.use_dbus:
1307
2316
# Emit D-Bus signal
1308
2317
client.GotSecret()
1309
2318
1310
2319
finally:
1311
2320
if approval_required:
1312
2321
client.approvals_pending -= 1
1313
2322
try:
1314
2323
session.bye()
1315
except (gnutls.errors.GNUTLSError), error:
1316
logger.warning("GnuTLS bye failed")
1317
2324
except gnutls.Error as error:
2325
logger.warning("GnuTLS bye failed",
2326
exc_info=error)
2327
1318
2328
@staticmethod
1319
2329
def peer_certificate(session):
1320
2330
"Return the peer's OpenPGP certificate as a bytestring"
1321
2331
# If not an OpenPGP certificate...
1322
if (gnutls.library.functions
1323
.gnutls_certificate_type_get(session._c_object)
1324
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1325
# ...do the normal thing
1326
return session.peer_certificate
2332
if (gnutls.certificate_type_get(session._c_object)
2333
!= gnutls.CRT_OPENPGP):
2334
# ...return invalid data
2335
return b""
1327
2336
list_size = ctypes.c_uint(1)
1328
cert_list = (gnutls.library.functions
1329
.gnutls_certificate_get_peers
2337
cert_list = (gnutls.certificate_get_peers
1330
2338
(session._c_object, ctypes.byref(list_size)))
1331
2339
if not bool(cert_list) and list_size.value != 0:
1332
raise gnutls.errors.GNUTLSError("error getting peer"
1333
" certificate")
2340
raise gnutls.Error("error getting peer certificate")
1334
2341
if list_size.value == 0:
1335
2342
return None
1336
2343
cert = cert_list[0]
1337
2344
return ctypes.string_at(cert.data, cert.size)
1338
2345
1339
2346
@staticmethod
1340
2347
def fingerprint(openpgp):
1341
2348
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1342
2349
# New GnuTLS "datum" with the OpenPGP public key
1343
datum = (gnutls.library.types
1344
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1345
ctypes.POINTER
1346
(ctypes.c_ubyte)),
1347
ctypes.c_uint(len(openpgp))))
2350
datum = gnutls.datum_t(
2351
ctypes.cast(ctypes.c_char_p(openpgp),
2352
ctypes.POINTER(ctypes.c_ubyte)),
2353
ctypes.c_uint(len(openpgp)))
1348
2354
# New empty GnuTLS certificate
1349
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1350
(gnutls.library.functions
1351
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
2355
crt = gnutls.openpgp_crt_t()
2356
gnutls.openpgp_crt_init(ctypes.byref(crt))
1352
2357
# Import the OpenPGP public key into the certificate
1353
(gnutls.library.functions
1354
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1355
gnutls.library.constants
1356
.GNUTLS_OPENPGP_FMT_RAW))
2358
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2359
gnutls.OPENPGP_FMT_RAW)
1357
2360
# Verify the self signature in the key
1358
2361
crtverify = ctypes.c_uint()
1359
(gnutls.library.functions
1360
.gnutls_openpgp_crt_verify_self(crt, 0,
1361
ctypes.byref(crtverify)))
2362
gnutls.openpgp_crt_verify_self(crt, 0,
2363
ctypes.byref(crtverify))
1362
2364
if crtverify.value != 0:
1363
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1364
raise (gnutls.errors.CertificateSecurityError
1365
("Verify failed"))
2365
gnutls.openpgp_crt_deinit(crt)
2366
raise gnutls.CertificateSecurityError("Verify failed")
1366
2367
# New buffer for the fingerprint
1367
2368
buf = ctypes.create_string_buffer(20)
1368
2369
buf_len = ctypes.c_size_t()
1369
2370
# Get the fingerprint from the certificate into the buffer
1370
(gnutls.library.functions
1371
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1372
ctypes.byref(buf_len)))
2371
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2372
ctypes.byref(buf_len))
1373
2373
# Deinit the certificate
1374
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2374
gnutls.openpgp_crt_deinit(crt)
1375
2375
# Convert the buffer to a Python bytestring
1376
2376
fpr = ctypes.string_at(buf, buf_len.value)
1377
2377
# Convert the bytestring to hexadecimal notation
1378
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
2378
hex_fpr = binascii.hexlify(fpr).upper()
1379
2379
return hex_fpr
1380
2380
1381
2381
1382
2382
class MultiprocessingMixIn(object):
1383
2383
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2384
1384
2385
def sub_process_main(self, request, address):
1385
2386
try:
1386
2387
self.finish_request(request, address)
1387
except:
2388
except Exception:
1388
2389
self.handle_error(request, address)
1389
2390
self.close_request(request)
1390
2391
1391
2392
def process_request(self, request, address):
1392
2393
"""Start a new process to process the request."""
1393
multiprocessing.Process(target = self.sub_process_main,
1394
args = (request, address)).start()
2394
proc = multiprocessing.Process(target=self.sub_process_main,
2395
args=(request, address))
2396
proc.start()
2397
return proc
2398
1395
2399
1396
2400
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1397
2401
""" adds a pipe to the MixIn """
2402
1398
2403
def process_request(self, request, client_address):
1399
2404
"""Overrides and wraps the original process_request().
1400
2405
1401
2406
This function creates a new pipe in self.pipe
1402
2407
"""
1403
2408
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1404
2409
1405
super(MultiprocessingMixInWithPipe,
1406
self).process_request(request, client_address)
2410
proc = MultiprocessingMixIn.process_request(self, request,
2411
client_address)
1407
2412
self.child_pipe.close()
1408
self.add_pipe(parent_pipe)
2413
self.add_pipe(parent_pipe, proc)
1409
2414
1410
def add_pipe(self, parent_pipe):
2415
def add_pipe(self, parent_pipe, proc):
1411
2416
"""Dummy function; override as necessary"""
1412
raise NotImplementedError
2417
raise NotImplementedError()
2418
1413
2419
1414
2420
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1415
2421
socketserver.TCPServer, object):
1416
2422
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1417
2423
1418
2424
Attributes:
1419
2425
enabled: Boolean; whether this server is activated yet
1420
2426
interface: None or a network interface name (string)
1421
2427
use_ipv6: Boolean; to use IPv6 or not
1422
2428
"""
2429
1423
2430
def __init__(self, server_address, RequestHandlerClass,
1424
interface=None, use_ipv6=True):
2431
interface=None,
2432
use_ipv6=True,
2433
socketfd=None):
2434
"""If socketfd is set, use that file descriptor instead of
2435
creating a new one with socket.socket().
2436
"""
1425
2437
self.interface = interface
1426
2438
if use_ipv6:
1427
2439
self.address_family = socket.AF_INET6
2440
if socketfd is not None:
2441
# Save the file descriptor
2442
self.socketfd = socketfd
2443
# Save the original socket.socket() function
2444
self.socket_socket = socket.socket
2445
2446
# To implement --socket, we monkey patch socket.socket.
2447
#
2448
# (When socketserver.TCPServer is a new-style class, we
2449
# could make self.socket into a property instead of monkey
2450
# patching socket.socket.)
2451
#
2452
# Create a one-time-only replacement for socket.socket()
2453
@functools.wraps(socket.socket)
2454
def socket_wrapper(*args, **kwargs):
2455
# Restore original function so subsequent calls are
2456
# not affected.
2457
socket.socket = self.socket_socket
2458
del self.socket_socket
2459
# This time only, return a new socket object from the
2460
# saved file descriptor.
2461
return socket.fromfd(self.socketfd, *args, **kwargs)
2462
# Replace socket.socket() function with wrapper
2463
socket.socket = socket_wrapper
2464
# The socketserver.TCPServer.__init__ will call
2465
# socket.socket(), which might be our replacement,
2466
# socket_wrapper(), if socketfd was set.
1428
2467
socketserver.TCPServer.__init__(self, server_address,
1429
2468
RequestHandlerClass)
2469
1430
2470
def server_bind(self):
1431
2471
"""This overrides the normal server_bind() function
1432
2472
to bind to an interface if one was specified, and also NOT to
1433
2473
bind to an address or port if they were not specified."""
2474
global SO_BINDTODEVICE
1434
2475
if self.interface is not None:
1435
2476
if SO_BINDTODEVICE is None:
1436
logger.error("SO_BINDTODEVICE does not exist;"
1437
" cannot bind to interface %s",
1438
self.interface)
1439
else:
1440
try:
1441
self.socket.setsockopt(socket.SOL_SOCKET,
1442
SO_BINDTODEVICE,
1443
str(self.interface
1444
+ '\0'))
1445
except socket.error, error:
1446
if error[0] == errno.EPERM:
1447
logger.error("No permission to"
1448
" bind to interface %s",
1449
self.interface)
1450
elif error[0] == errno.ENOPROTOOPT:
1451
logger.error("SO_BINDTODEVICE not available;"
1452
" cannot bind to interface %s",
1453
self.interface)
1454
else:
1455
raise
2477
# Fall back to a hard-coded value which seems to be
2478
# common enough.
2479
logger.warning("SO_BINDTODEVICE not found, trying 25")
2480
SO_BINDTODEVICE = 25
2481
try:
2482
self.socket.setsockopt(
2483
socket.SOL_SOCKET, SO_BINDTODEVICE,
2484
(self.interface + "\0").encode("utf-8"))
2485
except socket.error as error:
2486
if error.errno == errno.EPERM:
2487
logger.error("No permission to bind to"
2488
" interface %s", self.interface)
2489
elif error.errno == errno.ENOPROTOOPT:
2490
logger.error("SO_BINDTODEVICE not available;"
2491
" cannot bind to interface %s",
2492
self.interface)
2493
elif error.errno == errno.ENODEV:
2494
logger.error("Interface %s does not exist,"
2495
" cannot bind", self.interface)
2496
else:
2497
raise
1456
2498
# Only bind(2) the socket if we really need to.
1457
2499
if self.server_address[0] or self.server_address[1]:
1458
2500
if not self.server_address[0]:
1459
2501
if self.address_family == socket.AF_INET6:
1460
any_address = "::" # in6addr_any
2502
any_address = "::" # in6addr_any
1461
2503
else:
1462
any_address = socket.INADDR_ANY
2504
any_address = "0.0.0.0" # INADDR_ANY
1463
2505
self.server_address = (any_address,
1464
2506
self.server_address[1])
1465
2507
elif not self.server_address[1]:
1466
self.server_address = (self.server_address[0],
1467
0)
2508
self.server_address = (self.server_address[0], 0)
1468
2509
# if self.interface:
1469
2510
# self.server_address = (self.server_address[0],
1470
2511
# 0, # port
1476
2517
1477
2518
class MandosServer(IPv6_TCPServer):
1478
2519
"""Mandos server.
1479
2520
1480
2521
Attributes:
1481
2522
clients: set of Client objects
1482
2523
gnutls_priority GnuTLS priority string
1483
2524
use_dbus: Boolean; to emit D-Bus signals or not
1484
1485
Assumes a gobject.MainLoop event loop.
2525
2526
Assumes a GLib.MainLoop event loop.
1486
2527
"""
2528
1487
2529
def __init__(self, server_address, RequestHandlerClass,
1488
interface=None, use_ipv6=True, clients=None,
1489
gnutls_priority=None, use_dbus=True):
2530
interface=None,
2531
use_ipv6=True,
2532
clients=None,
2533
gnutls_priority=None,
2534
use_dbus=True,
2535
socketfd=None):
1490
2536
self.enabled = False
1491
2537
self.clients = clients
1492
2538
if self.clients is None:
1493
self.clients = set()
2539
self.clients = {}
1494
2540
self.use_dbus = use_dbus
1495
2541
self.gnutls_priority = gnutls_priority
1496
2542
IPv6_TCPServer.__init__(self, server_address,
1497
2543
RequestHandlerClass,
1498
interface = interface,
1499
use_ipv6 = use_ipv6)
2544
interface=interface,
2545
use_ipv6=use_ipv6,
2546
socketfd=socketfd)
2547
1500
2548
def server_activate(self):
1501
2549
if self.enabled:
1502
2550
return socketserver.TCPServer.server_activate(self)
2551
1503
2552
def enable(self):
1504
2553
self.enabled = True
1505
def add_pipe(self, parent_pipe):
2554
2555
def add_pipe(self, parent_pipe, proc):
1506
2556
# Call "handle_ipc" for both data and EOF events
1507
gobject.io_add_watch(parent_pipe.fileno(),
1508
gobject.IO_IN | gobject.IO_HUP,
1509
functools.partial(self.handle_ipc,
1510
parent_pipe = parent_pipe))
1511
1512
def handle_ipc(self, source, condition, parent_pipe=None,
2557
GLib.io_add_watch(
2558
parent_pipe.fileno(),
2559
GLib.IO_IN | GLib.IO_HUP,
2560
functools.partial(self.handle_ipc,
2561
parent_pipe=parent_pipe,
2562
proc=proc))
2563
2564
def handle_ipc(self, source, condition,
2565
parent_pipe=None,
2566
proc=None,
1513
2567
client_object=None):
1514
condition_names = {
1515
gobject.IO_IN: "IN", # There is data to read.
1516
gobject.IO_OUT: "OUT", # Data can be written (without
1517
# blocking).
1518
gobject.IO_PRI: "PRI", # There is urgent data to read.
1519
gobject.IO_ERR: "ERR", # Error condition.
1520
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1521
# broken, usually for pipes and
1522
# sockets).
1523
}
1524
conditions_string = ' | '.join(name
1525
for cond, name in
1526
condition_names.iteritems()
1527
if cond & condition)
1528
# error or the other end of multiprocessing.Pipe has closed
1529
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
2568
# error, or the other end of multiprocessing.Pipe has closed
2569
if condition & (GLib.IO_ERR | GLib.IO_HUP):
2570
# Wait for other process to exit
2571
proc.join()
1530
2572
return False
1531
2573
1532
2574
# Read a request from the child
1533
2575
request = parent_pipe.recv()
1534
2576
command = request[0]
1535
2577
1536
2578
if command == 'init':
1537
2579
fpr = request[1]
1538
2580
address = request[2]
1539
1540
for c in self.clients:
2581
2582
for c in self.clients.values():
1541
2583
if c.fingerprint == fpr:
1542
2584
client = c
1543
2585
break
1544
2586
else:
1545
logger.warning("Client not found for fingerprint: %s, ad"
1546
"dress: %s", fpr, address)
2587
logger.info("Client not found for fingerprint: %s, ad"
2588
"dress: %s", fpr, address)
1547
2589
if self.use_dbus:
1548
2590
# Emit D-Bus signal
1549
mandos_dbus_service.ClientNotFound(fpr, address[0])
2591
mandos_dbus_service.ClientNotFound(fpr,
2592
address[0])
1550
2593
parent_pipe.send(False)
1551
2594
return False
1552
1553
gobject.io_add_watch(parent_pipe.fileno(),
1554
gobject.IO_IN | gobject.IO_HUP,
1555
functools.partial(self.handle_ipc,
1556
parent_pipe = parent_pipe,
1557
client_object = client))
2595
2596
GLib.io_add_watch(
2597
parent_pipe.fileno(),
2598
GLib.IO_IN | GLib.IO_HUP,
2599
functools.partial(self.handle_ipc,
2600
parent_pipe=parent_pipe,
2601
proc=proc,
2602
client_object=client))
1558
2603
parent_pipe.send(True)
1559
# remove the old hook in favor of the new above hook on same fileno
2604
# remove the old hook in favor of the new above hook on
2605
# same fileno
1560
2606
return False
1561
2607
if command == 'funcall':
1562
2608
funcname = request[1]
1563
2609
args = request[2]
1564
2610
kwargs = request[3]
1565
1566
parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))
2611
2612
parent_pipe.send(('data', getattr(client_object,
2613
funcname)(*args,
2614
**kwargs)))
1567
2615
1568
2616
if command == 'getattr':
1569
2617
attrname = request[1]
1570
if callable(client_object.__getattribute__(attrname)):
1571
parent_pipe.send(('function',))
2618
if isinstance(client_object.__getattribute__(attrname),
2619
collections.Callable):
2620
parent_pipe.send(('function', ))
1572
2621
else:
1573
parent_pipe.send(('data', client_object.__getattribute__(attrname)))
1574
2622
parent_pipe.send((
2623
'data', client_object.__getattribute__(attrname)))
2624
1575
2625
if command == 'setattr':
1576
2626
attrname = request[1]
1577
2627
value = request[2]
1580
2630
return True
1581
2631
1582
2632
2633
def rfc3339_duration_to_delta(duration):
2634
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2635
2636
>>> rfc3339_duration_to_delta("P7D")
2637
datetime.timedelta(7)
2638
>>> rfc3339_duration_to_delta("PT60S")
2639
datetime.timedelta(0, 60)
2640
>>> rfc3339_duration_to_delta("PT60M")
2641
datetime.timedelta(0, 3600)
2642
>>> rfc3339_duration_to_delta("PT24H")
2643
datetime.timedelta(1)
2644
>>> rfc3339_duration_to_delta("P1W")
2645
datetime.timedelta(7)
2646
>>> rfc3339_duration_to_delta("PT5M30S")
2647
datetime.timedelta(0, 330)
2648
>>> rfc3339_duration_to_delta("P1DT3M20S")
2649
datetime.timedelta(1, 200)
2650
"""
2651
2652
# Parsing an RFC 3339 duration with regular expressions is not
2653
# possible - there would have to be multiple places for the same
2654
# values, like seconds. The current code, while more esoteric, is
2655
# cleaner without depending on a parsing library. If Python had a
2656
# built-in library for parsing we would use it, but we'd like to
2657
# avoid excessive use of external libraries.
2658
2659
# New type for defining tokens, syntax, and semantics all-in-one
2660
Token = collections.namedtuple("Token", (
2661
"regexp", # To match token; if "value" is not None, must have
2662
# a "group" containing digits
2663
"value", # datetime.timedelta or None
2664
"followers")) # Tokens valid after this token
2665
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2666
# the "duration" ABNF definition in RFC 3339, Appendix A.
2667
token_end = Token(re.compile(r"$"), None, frozenset())
2668
token_second = Token(re.compile(r"(\d+)S"),
2669
datetime.timedelta(seconds=1),
2670
frozenset((token_end, )))
2671
token_minute = Token(re.compile(r"(\d+)M"),
2672
datetime.timedelta(minutes=1),
2673
frozenset((token_second, token_end)))
2674
token_hour = Token(re.compile(r"(\d+)H"),
2675
datetime.timedelta(hours=1),
2676
frozenset((token_minute, token_end)))
2677
token_time = Token(re.compile(r"T"),
2678
None,
2679
frozenset((token_hour, token_minute,
2680
token_second)))
2681
token_day = Token(re.compile(r"(\d+)D"),
2682
datetime.timedelta(days=1),
2683
frozenset((token_time, token_end)))
2684
token_month = Token(re.compile(r"(\d+)M"),
2685
datetime.timedelta(weeks=4),
2686
frozenset((token_day, token_end)))
2687
token_year = Token(re.compile(r"(\d+)Y"),
2688
datetime.timedelta(weeks=52),
2689
frozenset((token_month, token_end)))
2690
token_week = Token(re.compile(r"(\d+)W"),
2691
datetime.timedelta(weeks=1),
2692
frozenset((token_end, )))
2693
token_duration = Token(re.compile(r"P"), None,
2694
frozenset((token_year, token_month,
2695
token_day, token_time,
2696
token_week)))
2697
# Define starting values:
2698
# Value so far
2699
value = datetime.timedelta()
2700
found_token = None
2701
# Following valid tokens
2702
followers = frozenset((token_duration, ))
2703
# String left to parse
2704
s = duration
2705
# Loop until end token is found
2706
while found_token is not token_end:
2707
# Search for any currently valid tokens
2708
for token in followers:
2709
match = token.regexp.match(s)
2710
if match is not None:
2711
# Token found
2712
if token.value is not None:
2713
# Value found, parse digits
2714
factor = int(match.group(1), 10)
2715
# Add to value so far
2716
value += factor * token.value
2717
# Strip token from string
2718
s = token.regexp.sub("", s, 1)
2719
# Go to found token
2720
found_token = token
2721
# Set valid next tokens
2722
followers = found_token.followers
2723
break
2724
else:
2725
# No currently valid tokens were found
2726
raise ValueError("Invalid RFC 3339 duration: {!r}"
2727
.format(duration))
2728
# End token found
2729
return value
2730
2731
1583
2732
def string_to_delta(interval):
1584
2733
"""Parse a string and return a datetime.timedelta
1585
2734
1586
2735
>>> string_to_delta('7d')
1587
2736
datetime.timedelta(7)
1588
2737
>>> string_to_delta('60s')
1596
2745
>>> string_to_delta('5m 30s')
1597
2746
datetime.timedelta(0, 330)
1598
2747
"""
2748
2749
try:
2750
return rfc3339_duration_to_delta(interval)
2751
except ValueError:
2752
pass
2753
1599
2754
timevalue = datetime.timedelta(0)
1600
2755
for s in interval.split():
1601
2756
try:
1602
suffix = unicode(s[-1])
2757
suffix = s[-1]
1603
2758
value = int(s[:-1])
1604
2759
if suffix == "d":
1605
2760
delta = datetime.timedelta(value)
1612
2767
elif suffix == "w":
1613
2768
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1614
2769
else:
1615
raise ValueError("Unknown suffix %r" % suffix)
1616
except (ValueError, IndexError), e:
2770
raise ValueError("Unknown suffix {!r}".format(suffix))
2771
except IndexError as e:
1617
2772
raise ValueError(*(e.args))
1618
2773
timevalue += delta
1619
2774
return timevalue
1620
2775
1621
2776
1622
def if_nametoindex(interface):
1623
"""Call the C function if_nametoindex(), or equivalent
1624
1625
Note: This function cannot accept a unicode string."""
1626
global if_nametoindex
1627
try:
1628
if_nametoindex = (ctypes.cdll.LoadLibrary
1629
(ctypes.util.find_library("c"))
1630
.if_nametoindex)
1631
except (OSError, AttributeError):
1632
logger.warning("Doing if_nametoindex the hard way")
1633
def if_nametoindex(interface):
1634
"Get an interface index the hard way, i.e. using fcntl()"
1635
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1636
with contextlib.closing(socket.socket()) as s:
1637
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1638
struct.pack(str("16s16x"),
1639
interface))
1640
interface_index = struct.unpack(str("I"),
1641
ifreq[16:20])[0]
1642
return interface_index
1643
return if_nametoindex(interface)
1644
1645
1646
def daemon(nochdir = False, noclose = False):
2777
def daemon(nochdir=False, noclose=False):
1647
2778
"""See daemon(3). Standard BSD Unix function.
1648
2779
1649
2780
This should really exist as os.daemon, but it doesn't (yet)."""
1650
2781
if os.fork():
1651
2782
sys.exit()
1656
2787
sys.exit()
1657
2788
if not noclose:
1658
2789
# Close all standard open file descriptors
1659
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2790
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1660
2791
if not stat.S_ISCHR(os.fstat(null).st_mode):
1661
2792
raise OSError(errno.ENODEV,
1662
"%s not a character device"
1663
% os.path.devnull)
2793
"{} not a character device"
2794
.format(os.devnull))
1664
2795
os.dup2(null, sys.stdin.fileno())
1665
2796
os.dup2(null, sys.stdout.fileno())
1666
2797
os.dup2(null, sys.stderr.fileno())
1669
2800
1670
2801
1671
2802
def main():
1672
2803
1673
2804
##################################################################
1674
2805
# Parsing of options, both command line and config file
1675
2806
1676
2807
parser = argparse.ArgumentParser()
1677
2808
parser.add_argument("-v", "--version", action="version",
1678
version = "%%(prog)s %s" % version,
2809
version="%(prog)s {}".format(version),
1679
2810
help="show version number and exit")
1680
2811
parser.add_argument("-i", "--interface", metavar="IF",
1681
2812
help="Bind to interface IF")
1687
2818
help="Run self-test")
1688
2819
parser.add_argument("--debug", action="store_true",
1689
2820
help="Debug mode; run in foreground and log"
1690
" to terminal")
2821
" to terminal", default=None)
1691
2822
parser.add_argument("--debuglevel", metavar="LEVEL",
1692
2823
help="Debug level for stdout output")
1693
2824
parser.add_argument("--priority", help="GnuTLS"
1700
2831
" files")
1701
2832
parser.add_argument("--no-dbus", action="store_false",
1702
2833
dest="use_dbus", help="Do not provide D-Bus"
1703
" system bus interface")
2834
" system bus interface", default=None)
1704
2835
parser.add_argument("--no-ipv6", action="store_false",
1705
dest="use_ipv6", help="Do not use IPv6")
2836
dest="use_ipv6", help="Do not use IPv6",
2837
default=None)
2838
parser.add_argument("--no-restore", action="store_false",
2839
dest="restore", help="Do not restore stored"
2840
" state", default=None)
2841
parser.add_argument("--socket", type=int,
2842
help="Specify a file descriptor to a network"
2843
" socket to use instead of creating one")
2844
parser.add_argument("--statedir", metavar="DIR",
2845
help="Directory to save/restore state in")
2846
parser.add_argument("--foreground", action="store_true",
2847
help="Run in foreground", default=None)
2848
parser.add_argument("--no-zeroconf", action="store_false",
2849
dest="zeroconf", help="Do not use Zeroconf",
2850
default=None)
2851
1706
2852
options = parser.parse_args()
1707
2853
1708
2854
if options.check:
1709
2855
import doctest
1710
doctest.testmod()
1711
sys.exit()
1712
2856
fail_count, test_count = doctest.testmod()
2857
sys.exit(os.EX_OK if fail_count == 0 else 1)
2858
1713
2859
# Default values for config file for server-global settings
1714
server_defaults = { "interface": "",
1715
"address": "",
1716
"port": "",
1717
"debug": "False",
1718
"priority":
1719
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1720
"servicename": "Mandos",
1721
"use_dbus": "True",
1722
"use_ipv6": "True",
1723
"debuglevel": "",
1724
}
1725
2860
server_defaults = {"interface": "",
2861
"address": "",
2862
"port": "",
2863
"debug": "False",
2864
"priority":
2865
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2866
":+SIGN-DSA-SHA256",
2867
"servicename": "Mandos",
2868
"use_dbus": "True",
2869
"use_ipv6": "True",
2870
"debuglevel": "",
2871
"restore": "True",
2872
"socket": "",
2873
"statedir": "/var/lib/mandos",
2874
"foreground": "False",
2875
"zeroconf": "True",
2876
}
2877
1726
2878
# Parse config file for server-global settings
1727
2879
server_config = configparser.SafeConfigParser(server_defaults)
1728
2880
del server_defaults
1729
server_config.read(os.path.join(options.configdir,
1730
"mandos.conf"))
2881
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1731
2882
# Convert the SafeConfigParser object to a dict
1732
2883
server_settings = server_config.defaults()
1733
2884
# Use the appropriate methods on the non-string config options
1734
for option in ("debug", "use_dbus", "use_ipv6"):
2885
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
1735
2886
server_settings[option] = server_config.getboolean("DEFAULT",
1736
2887
option)
1737
2888
if server_settings["port"]:
1738
2889
server_settings["port"] = server_config.getint("DEFAULT",
1739
2890
"port")
2891
if server_settings["socket"]:
2892
server_settings["socket"] = server_config.getint("DEFAULT",
2893
"socket")
2894
# Later, stdin will, and stdout and stderr might, be dup'ed
2895
# over with an opened os.devnull. But we don't want this to
2896
# happen with a supplied network socket.
2897
if 0 <= server_settings["socket"] <= 2:
2898
server_settings["socket"] = os.dup(server_settings
2899
["socket"])
1740
2900
del server_config
1741
2901
1742
2902
# Override the settings from the config file with command line
1743
2903
# options, if set.
1744
2904
for option in ("interface", "address", "port", "debug",
1745
"priority", "servicename", "configdir",
1746
"use_dbus", "use_ipv6", "debuglevel"):
2905
"priority", "servicename", "configdir", "use_dbus",
2906
"use_ipv6", "debuglevel", "restore", "statedir",
2907
"socket", "foreground", "zeroconf"):
1747
2908
value = getattr(options, option)
1748
2909
if value is not None:
1749
2910
server_settings[option] = value
1750
2911
del options
1751
2912
# Force all strings to be unicode
1752
2913
for option in server_settings.keys():
1753
if type(server_settings[option]) is str:
1754
server_settings[option] = unicode(server_settings[option])
2914
if isinstance(server_settings[option], bytes):
2915
server_settings[option] = (server_settings[option]
2916
.decode("utf-8"))
2917
# Force all boolean options to be boolean
2918
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2919
"foreground", "zeroconf"):
2920
server_settings[option] = bool(server_settings[option])
2921
# Debug implies foreground
2922
if server_settings["debug"]:
2923
server_settings["foreground"] = True
1755
2924
# Now we have our good server settings in "server_settings"
1756
2925
1757
2926
##################################################################
1758
2927
2928
if (not server_settings["zeroconf"]
2929
and not (server_settings["port"]
2930
or server_settings["socket"] != "")):
2931
parser.error("Needs port or socket to work without Zeroconf")
2932
1759
2933
# For convenience
1760
2934
debug = server_settings["debug"]
1761
2935
debuglevel = server_settings["debuglevel"]
1762
2936
use_dbus = server_settings["use_dbus"]
1763
2937
use_ipv6 = server_settings["use_ipv6"]
2938
stored_state_path = os.path.join(server_settings["statedir"],
2939
stored_state_file)
2940
foreground = server_settings["foreground"]
2941
zeroconf = server_settings["zeroconf"]
2942
2943
if debug:
2944
initlogger(debug, logging.DEBUG)
2945
else:
2946
if not debuglevel:
2947
initlogger(debug)
2948
else:
2949
level = getattr(logging, debuglevel.upper())
2950
initlogger(debug, level)
1764
2951
1765
2952
if server_settings["servicename"] != "Mandos":
1766
syslogger.setFormatter(logging.Formatter
1767
('Mandos (%s) [%%(process)d]:'
1768
' %%(levelname)s: %%(message)s'
1769
% server_settings["servicename"]))
1770
2953
syslogger.setFormatter(
2954
logging.Formatter('Mandos ({}) [%(process)d]:'
2955
' %(levelname)s: %(message)s'.format(
2956
server_settings["servicename"])))
2957
1771
2958
# Parse config file with clients
1772
client_defaults = { "timeout": "1h",
1773
"interval": "5m",
1774
"checker": "fping -q -- %%(host)s",
1775
"host": "",
1776
"approval_delay": "0s",
1777
"approval_duration": "1s",
1778
}
1779
client_config = configparser.SafeConfigParser(client_defaults)
2959
client_config = configparser.SafeConfigParser(Client
2960
.client_defaults)
1780
2961
client_config.read(os.path.join(server_settings["configdir"],
1781
2962
"clients.conf"))
1782
2963
1783
2964
global mandos_dbus_service
1784
2965
mandos_dbus_service = None
1785
1786
tcp_server = MandosServer((server_settings["address"],
1787
server_settings["port"]),
1788
ClientHandler,
1789
interface=(server_settings["interface"]
1790
or None),
1791
use_ipv6=use_ipv6,
1792
gnutls_priority=
1793
server_settings["priority"],
1794
use_dbus=use_dbus)
1795
if not debug:
1796
pidfilename = "/var/run/mandos.pid"
1797
try:
1798
pidfile = open(pidfilename, "w")
1799
except IOError:
1800
logger.error("Could not open file %r", pidfilename)
1801
1802
try:
1803
uid = pwd.getpwnam("_mandos").pw_uid
1804
gid = pwd.getpwnam("_mandos").pw_gid
1805
except KeyError:
1806
try:
1807
uid = pwd.getpwnam("mandos").pw_uid
1808
gid = pwd.getpwnam("mandos").pw_gid
2966
2967
socketfd = None
2968
if server_settings["socket"] != "":
2969
socketfd = server_settings["socket"]
2970
tcp_server = MandosServer(
2971
(server_settings["address"], server_settings["port"]),
2972
ClientHandler,
2973
interface=(server_settings["interface"] or None),
2974
use_ipv6=use_ipv6,
2975
gnutls_priority=server_settings["priority"],
2976
use_dbus=use_dbus,
2977
socketfd=socketfd)
2978
if not foreground:
2979
pidfilename = "/run/mandos.pid"
2980
if not os.path.isdir("/run/."):
2981
pidfilename = "/var/run/mandos.pid"
2982
pidfile = None
2983
try:
2984
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
2985
except IOError as e:
2986
logger.error("Could not open file %r", pidfilename,
2987
exc_info=e)
2988
2989
for name, group in (("_mandos", "_mandos"),
2990
("mandos", "mandos"),
2991
("nobody", "nogroup")):
2992
try:
2993
uid = pwd.getpwnam(name).pw_uid
2994
gid = pwd.getpwnam(group).pw_gid
2995
break
1809
2996
except KeyError:
1810
try:
1811
uid = pwd.getpwnam("nobody").pw_uid
1812
gid = pwd.getpwnam("nobody").pw_gid
1813
except KeyError:
1814
uid = 65534
1815
gid = 65534
2997
continue
2998
else:
2999
uid = 65534
3000
gid = 65534
1816
3001
try:
1817
3002
os.setgid(gid)
1818
3003
os.setuid(uid)
1819
except OSError, error:
1820
if error[0] != errno.EPERM:
1821
raise error
1822
1823
if not debug and not debuglevel:
1824
syslogger.setLevel(logging.WARNING)
1825
console.setLevel(logging.WARNING)
1826
if debuglevel:
1827
level = getattr(logging, debuglevel.upper())
1828
syslogger.setLevel(level)
1829
console.setLevel(level)
3004
if debug:
3005
logger.debug("Did setuid/setgid to {}:{}".format(uid,
3006
gid))
3007
except OSError as error:
3008
logger.warning("Failed to setuid/setgid to {}:{}: {}"
3009
.format(uid, gid, os.strerror(error.errno)))
3010
if error.errno != errno.EPERM:
3011
raise
1830
3012
1831
3013
if debug:
1832
3014
# Enable all possible GnuTLS debugging
1833
3015
1834
3016
# "Use a log level over 10 to enable all debugging options."
1835
3017
# - GnuTLS manual
1836
gnutls.library.functions.gnutls_global_set_log_level(11)
1837
1838
@gnutls.library.types.gnutls_log_func
3018
gnutls.global_set_log_level(11)
3019
3020
@gnutls.log_func
1839
3021
def debug_gnutls(level, string):
1840
3022
logger.debug("GnuTLS: %s", string[:-1])
1841
1842
(gnutls.library.functions
1843
.gnutls_global_set_log_function(debug_gnutls))
1844
3023
3024
gnutls.global_set_log_function(debug_gnutls)
3025
1845
3026
# Redirect stdin so all checkers get /dev/null
1846
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
3027
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1847
3028
os.dup2(null, sys.stdin.fileno())
1848
3029
if null > 2:
1849
3030
os.close(null)
1850
else:
1851
# No console logging
1852
logger.removeHandler(console)
1853
3031
1854
3032
# Need to fork before connecting to D-Bus
1855
if not debug:
3033
if not foreground:
1856
3034
# Close all input and output, do double fork, etc.
1857
3035
daemon()
1858
3036
3037
# multiprocessing will use threads, so before we use GLib we need
3038
# to inform GLib that threads will be used.
3039
GLib.threads_init()
3040
1859
3041
global main_loop
1860
3042
# From the Avahi example code
1861
DBusGMainLoop(set_as_default=True )
1862
main_loop = gobject.MainLoop()
3043
DBusGMainLoop(set_as_default=True)
3044
main_loop = GLib.MainLoop()
1863
3045
bus = dbus.SystemBus()
1864
3046
# End of Avahi example code
1865
3047
if use_dbus:
1866
3048
try:
1867
bus_name = dbus.service.BusName("se.bsnet.fukt.Mandos",
1868
bus, do_not_queue=True)
1869
except dbus.exceptions.NameExistsException, e:
1870
logger.error(unicode(e) + ", disabling D-Bus")
3049
bus_name = dbus.service.BusName("se.recompile.Mandos",
3050
bus,
3051
do_not_queue=True)
3052
old_bus_name = dbus.service.BusName(
3053
"se.bsnet.fukt.Mandos", bus,
3054
do_not_queue=True)
3055
except dbus.exceptions.DBusException as e:
3056
logger.error("Disabling D-Bus:", exc_info=e)
1871
3057
use_dbus = False
1872
3058
server_settings["use_dbus"] = False
1873
3059
tcp_server.use_dbus = False
1874
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1875
service = AvahiService(name = server_settings["servicename"],
1876
servicetype = "_mandos._tcp",
1877
protocol = protocol, bus = bus)
1878
if server_settings["interface"]:
1879
service.interface = (if_nametoindex
1880
(str(server_settings["interface"])))
1881
3060
if zeroconf:
3061
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3062
service = AvahiServiceToSyslog(
3063
name=server_settings["servicename"],
3064
servicetype="_mandos._tcp",
3065
protocol=protocol,
3066
bus=bus)
3067
if server_settings["interface"]:
3068
service.interface = if_nametoindex(
3069
server_settings["interface"].encode("utf-8"))
3070
1882
3071
global multiprocessing_manager
1883
3072
multiprocessing_manager = multiprocessing.Manager()
1884
3073
1885
3074
client_class = Client
1886
3075
if use_dbus:
1887
client_class = functools.partial(ClientDBus, bus = bus)
1888
def client_config_items(config, section):
1889
special_settings = {
1890
"approved_by_default":
1891
lambda: config.getboolean(section,
1892
"approved_by_default"),
1893
}
1894
for name, value in config.items(section):
3076
client_class = functools.partial(ClientDBus, bus=bus)
3077
3078
client_settings = Client.config_parser(client_config)
3079
old_client_settings = {}
3080
clients_data = {}
3081
3082
# This is used to redirect stdout and stderr for checker processes
3083
global wnull
3084
wnull = open(os.devnull, "w") # A writable /dev/null
3085
# Only used if server is running in foreground but not in debug
3086
# mode
3087
if debug or not foreground:
3088
wnull.close()
3089
3090
# Get client data and settings from last running state.
3091
if server_settings["restore"]:
3092
try:
3093
with open(stored_state_path, "rb") as stored_state:
3094
if sys.version_info.major == 2:
3095
clients_data, old_client_settings = pickle.load(
3096
stored_state)
3097
else:
3098
bytes_clients_data, bytes_old_client_settings = (
3099
pickle.load(stored_state, encoding="bytes"))
3100
# Fix bytes to strings
3101
# clients_data
3102
# .keys()
3103
clients_data = {(key.decode("utf-8")
3104
if isinstance(key, bytes)
3105
else key): value
3106
for key, value in
3107
bytes_clients_data.items()}
3108
del bytes_clients_data
3109
for key in clients_data:
3110
value = {(k.decode("utf-8")
3111
if isinstance(k, bytes) else k): v
3112
for k, v in
3113
clients_data[key].items()}
3114
clients_data[key] = value
3115
# .client_structure
3116
value["client_structure"] = [
3117
(s.decode("utf-8")
3118
if isinstance(s, bytes)
3119
else s) for s in
3120
value["client_structure"]]
3121
# .name & .host
3122
for k in ("name", "host"):
3123
if isinstance(value[k], bytes):
3124
value[k] = value[k].decode("utf-8")
3125
# old_client_settings
3126
# .keys()
3127
old_client_settings = {
3128
(key.decode("utf-8")
3129
if isinstance(key, bytes)
3130
else key): value
3131
for key, value in
3132
bytes_old_client_settings.items()}
3133
del bytes_old_client_settings
3134
# .host
3135
for value in old_client_settings.values():
3136
if isinstance(value["host"], bytes):
3137
value["host"] = (value["host"]
3138
.decode("utf-8"))
3139
os.remove(stored_state_path)
3140
except IOError as e:
3141
if e.errno == errno.ENOENT:
3142
logger.warning("Could not load persistent state:"
3143
" {}".format(os.strerror(e.errno)))
3144
else:
3145
logger.critical("Could not load persistent state:",
3146
exc_info=e)
3147
raise
3148
except EOFError as e:
3149
logger.warning("Could not load persistent state: "
3150
"EOFError:",
3151
exc_info=e)
3152
3153
with PGPEngine() as pgp:
3154
for client_name, client in clients_data.items():
3155
# Skip removed clients
3156
if client_name not in client_settings:
3157
continue
3158
3159
# Decide which value to use after restoring saved state.
3160
# We have three different values: Old config file,
3161
# new config file, and saved state.
3162
# New config value takes precedence if it differs from old
3163
# config value, otherwise use saved state.
3164
for name, value in client_settings[client_name].items():
3165
try:
3166
# For each value in new config, check if it
3167
# differs from the old config value (Except for
3168
# the "secret" attribute)
3169
if (name != "secret"
3170
and (value !=
3171
old_client_settings[client_name][name])):
3172
client[name] = value
3173
except KeyError:
3174
pass
3175
3176
# Clients who has passed its expire date can still be
3177
# enabled if its last checker was successful. A Client
3178
# whose checker succeeded before we stored its state is
3179
# assumed to have successfully run all checkers during
3180
# downtime.
3181
if client["enabled"]:
3182
if datetime.datetime.utcnow() >= client["expires"]:
3183
if not client["last_checked_ok"]:
3184
logger.warning(
3185
"disabling client {} - Client never "
3186
"performed a successful checker".format(
3187
client_name))
3188
client["enabled"] = False
3189
elif client["last_checker_status"] != 0:
3190
logger.warning(
3191
"disabling client {} - Client last"
3192
" checker failed with error code"
3193
" {}".format(
3194
client_name,
3195
client["last_checker_status"]))
3196
client["enabled"] = False
3197
else:
3198
client["expires"] = (
3199
datetime.datetime.utcnow()
3200
+ client["timeout"])
3201
logger.debug("Last checker succeeded,"
3202
" keeping {} enabled".format(
3203
client_name))
1895
3204
try:
1896
yield (name, special_settings[name]())
1897
except KeyError:
1898
yield (name, value)
1899
1900
tcp_server.clients.update(set(
1901
client_class(name = section,
1902
config= dict(client_config_items(
1903
client_config, section)))
1904
for section in client_config.sections()))
3205
client["secret"] = pgp.decrypt(
3206
client["encrypted_secret"],
3207
client_settings[client_name]["secret"])
3208
except PGPError:
3209
# If decryption fails, we use secret from new settings
3210
logger.debug("Failed to decrypt {} old secret".format(
3211
client_name))
3212
client["secret"] = (client_settings[client_name]
3213
["secret"])
3214
3215
# Add/remove clients based on new changes made to config
3216
for client_name in (set(old_client_settings)
3217
- set(client_settings)):
3218
del clients_data[client_name]
3219
for client_name in (set(client_settings)
3220
- set(old_client_settings)):
3221
clients_data[client_name] = client_settings[client_name]
3222
3223
# Create all client objects
3224
for client_name, client in clients_data.items():
3225
tcp_server.clients[client_name] = client_class(
3226
name=client_name,
3227
settings=client,
3228
server_settings=server_settings)
3229
1905
3230
if not tcp_server.clients:
1906
3231
logger.warning("No clients defined")
1907
1908
if not debug:
1909
try:
1910
with pidfile:
1911
pid = os.getpid()
1912
pidfile.write(str(pid) + "\n".encode("utf-8"))
1913
del pidfile
1914
except IOError:
1915
logger.error("Could not write to file %r with PID %d",
1916
pidfilename, pid)
1917
except NameError:
1918
# "pidfile" was never created
1919
pass
3232
3233
if not foreground:
3234
if pidfile is not None:
3235
pid = os.getpid()
3236
try:
3237
with pidfile:
3238
print(pid, file=pidfile)
3239
except IOError:
3240
logger.error("Could not write to file %r with PID %d",
3241
pidfilename, pid)
3242
del pidfile
1920
3243
del pidfilename
1921
1922
signal.signal(signal.SIGINT, signal.SIG_IGN)
1923
1924
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1925
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1926
3244
3245
for termsig in (signal.SIGHUP, signal.SIGTERM):
3246
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3247
lambda: main_loop.quit() and False)
3248
1927
3249
if use_dbus:
1928
class MandosDBusService(dbus.service.Object):
3250
3251
@alternate_dbus_interfaces(
3252
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3253
class MandosDBusService(DBusObjectWithObjectManager):
1929
3254
"""A D-Bus proxy object"""
3255
1930
3256
def __init__(self):
1931
3257
dbus.service.Object.__init__(self, bus, "/")
1932
_interface = "se.bsnet.fukt.Mandos"
1933
3258
3259
_interface = "se.recompile.Mandos"
3260
1934
3261
@dbus.service.signal(_interface, signature="o")
1935
3262
def ClientAdded(self, objpath):
1936
3263
"D-Bus signal"
1937
3264
pass
1938
3265
1939
3266
@dbus.service.signal(_interface, signature="ss")
1940
3267
def ClientNotFound(self, fingerprint, address):
1941
3268
"D-Bus signal"
1942
3269
pass
1943
3270
3271
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3272
"true"})
1944
3273
@dbus.service.signal(_interface, signature="os")
1945
3274
def ClientRemoved(self, objpath, name):
1946
3275
"D-Bus signal"
1947
3276
pass
1948
3277
3278
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3279
"true"})
1949
3280
@dbus.service.method(_interface, out_signature="ao")
1950
3281
def GetAllClients(self):
1951
3282
"D-Bus method"
1952
return dbus.Array(c.dbus_object_path
1953
for c in tcp_server.clients)
1954
3283
return dbus.Array(c.dbus_object_path for c in
3284
tcp_server.clients.values())
3285
3286
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3287
"true"})
1955
3288
@dbus.service.method(_interface,
1956
3289
out_signature="a{oa{sv}}")
1957
3290
def GetAllClientsWithProperties(self):
1958
3291
"D-Bus method"
1959
3292
return dbus.Dictionary(
1960
((c.dbus_object_path, c.GetAll(""))
1961
for c in tcp_server.clients),
3293
{c.dbus_object_path: c.GetAll(
3294
"se.recompile.Mandos.Client")
3295
for c in tcp_server.clients.values()},
1962
3296
signature="oa{sv}")
1963
3297
1964
3298
@dbus.service.method(_interface, in_signature="o")
1965
3299
def RemoveClient(self, object_path):
1966
3300
"D-Bus method"
1967
for c in tcp_server.clients:
3301
for c in tcp_server.clients.values():
1968
3302
if c.dbus_object_path == object_path:
1969
tcp_server.clients.remove(c)
3303
del tcp_server.clients[c.name]
1970
3304
c.remove_from_connection()
1971
# Don't signal anything except ClientRemoved
3305
# Don't signal the disabling
1972
3306
c.disable(quiet=True)
1973
# Emit D-Bus signal
1974
self.ClientRemoved(object_path, c.name)
3307
# Emit D-Bus signal for removal
3308
self.client_removed_signal(c)
1975
3309
return
1976
3310
raise KeyError(object_path)
1977
3311
1978
3312
del _interface
1979
3313
3314
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3315
out_signature="a{oa{sa{sv}}}")
3316
def GetManagedObjects(self):
3317
"""D-Bus method"""
3318
return dbus.Dictionary(
3319
{client.dbus_object_path:
3320
dbus.Dictionary(
3321
{interface: client.GetAll(interface)
3322
for interface in
3323
client._get_all_interface_names()})
3324
for client in tcp_server.clients.values()})
3325
3326
def client_added_signal(self, client):
3327
"""Send the new standard signal and the old signal"""
3328
if use_dbus:
3329
# New standard signal
3330
self.InterfacesAdded(
3331
client.dbus_object_path,
3332
dbus.Dictionary(
3333
{interface: client.GetAll(interface)
3334
for interface in
3335
client._get_all_interface_names()}))
3336
# Old signal
3337
self.ClientAdded(client.dbus_object_path)
3338
3339
def client_removed_signal(self, client):
3340
"""Send the new standard signal and the old signal"""
3341
if use_dbus:
3342
# New standard signal
3343
self.InterfacesRemoved(
3344
client.dbus_object_path,
3345
client._get_all_interface_names())
3346
# Old signal
3347
self.ClientRemoved(client.dbus_object_path,
3348
client.name)
3349
1980
3350
mandos_dbus_service = MandosDBusService()
1981
3351
3352
# Save modules to variables to exempt the modules from being
3353
# unloaded before the function registered with atexit() is run.
3354
mp = multiprocessing
3355
wn = wnull
3356
1982
3357
def cleanup():
1983
3358
"Cleanup function; run on exit"
1984
service.cleanup()
1985
3359
if zeroconf:
3360
service.cleanup()
3361
3362
mp.active_children()
3363
wn.close()
3364
if not (tcp_server.clients or client_settings):
3365
return
3366
3367
# Store client before exiting. Secrets are encrypted with key
3368
# based on what config file has. If config file is
3369
# removed/edited, old secret will thus be unrecovable.
3370
clients = {}
3371
with PGPEngine() as pgp:
3372
for client in tcp_server.clients.values():
3373
key = client_settings[client.name]["secret"]
3374
client.encrypted_secret = pgp.encrypt(client.secret,
3375
key)
3376
client_dict = {}
3377
3378
# A list of attributes that can not be pickled
3379
# + secret.
3380
exclude = {"bus", "changedstate", "secret",
3381
"checker", "server_settings"}
3382
for name, typ in inspect.getmembers(dbus.service
3383
.Object):
3384
exclude.add(name)
3385
3386
client_dict["encrypted_secret"] = (client
3387
.encrypted_secret)
3388
for attr in client.client_structure:
3389
if attr not in exclude:
3390
client_dict[attr] = getattr(client, attr)
3391
3392
clients[client.name] = client_dict
3393
del client_settings[client.name]["secret"]
3394
3395
try:
3396
with tempfile.NamedTemporaryFile(
3397
mode='wb',
3398
suffix=".pickle",
3399
prefix='clients-',
3400
dir=os.path.dirname(stored_state_path),
3401
delete=False) as stored_state:
3402
pickle.dump((clients, client_settings), stored_state,
3403
protocol=2)
3404
tempname = stored_state.name
3405
os.rename(tempname, stored_state_path)
3406
except (IOError, OSError) as e:
3407
if not debug:
3408
try:
3409
os.remove(tempname)
3410
except NameError:
3411
pass
3412
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
3413
logger.warning("Could not save persistent state: {}"
3414
.format(os.strerror(e.errno)))
3415
else:
3416
logger.warning("Could not save persistent state:",
3417
exc_info=e)
3418
raise
3419
3420
# Delete all clients, and settings from config
1986
3421
while tcp_server.clients:
1987
client = tcp_server.clients.pop()
3422
name, client = tcp_server.clients.popitem()
1988
3423
if use_dbus:
1989
3424
client.remove_from_connection()
1990
client.disable_hook = None
1991
# Don't signal anything except ClientRemoved
3425
# Don't signal the disabling
1992
3426
client.disable(quiet=True)
3427
# Emit D-Bus signal for removal
1993
3428
if use_dbus:
1994
# Emit D-Bus signal
1995
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
1996
client.name)
1997
3429
mandos_dbus_service.client_removed_signal(client)
3430
client_settings.clear()
3431
1998
3432
atexit.register(cleanup)
1999
2000
for client in tcp_server.clients:
3433
3434
for client in tcp_server.clients.values():
2001
3435
if use_dbus:
2002
# Emit D-Bus signal
2003
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2004
client.enable()
2005
3436
# Emit D-Bus signal for adding
3437
mandos_dbus_service.client_added_signal(client)
3438
# Need to initiate checking of clients
3439
if client.enabled:
3440
client.init_checker()
3441
2006
3442
tcp_server.enable()
2007
3443
tcp_server.server_activate()
2008
3444
2009
3445
# Find out what port we got
2010
service.port = tcp_server.socket.getsockname()[1]
3446
if zeroconf:
3447
service.port = tcp_server.socket.getsockname()[1]
2011
3448
if use_ipv6:
2012
3449
logger.info("Now listening on address %r, port %d,"
2013
" flowinfo %d, scope_id %d"
2014
% tcp_server.socket.getsockname())
3450
" flowinfo %d, scope_id %d",
3451
*tcp_server.socket.getsockname())
2015
3452
else: # IPv4
2016
logger.info("Now listening on address %r, port %d"
2017
% tcp_server.socket.getsockname())
2018
2019
#service.interface = tcp_server.socket.getsockname()[3]
2020
3453
logger.info("Now listening on address %r, port %d",
3454
*tcp_server.socket.getsockname())
3455
3456
# service.interface = tcp_server.socket.getsockname()[3]
3457
2021
3458
try:
2022
# From the Avahi example code
2023
try:
2024
service.activate()
2025
except dbus.exceptions.DBusException, error:
2026
logger.critical("DBusException: %s", error)
2027
cleanup()
2028
sys.exit(1)
2029
# End of Avahi example code
2030
2031
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2032
lambda *args, **kwargs:
2033
(tcp_server.handle_request
2034
(*args[2:], **kwargs) or True))
2035
3459
if zeroconf:
3460
# From the Avahi example code
3461
try:
3462
service.activate()
3463
except dbus.exceptions.DBusException as error:
3464
logger.critical("D-Bus Exception", exc_info=error)
3465
cleanup()
3466
sys.exit(1)
3467
# End of Avahi example code
3468
3469
GLib.io_add_watch(tcp_server.fileno(), GLib.IO_IN,
3470
lambda *args, **kwargs:
3471
(tcp_server.handle_request
3472
(*args[2:], **kwargs) or True))
3473
2036
3474
logger.debug("Starting main loop")
2037
3475
main_loop.run()
2038
except AvahiError, error:
2039
logger.critical("AvahiError: %s", error)
3476
except AvahiError as error:
3477
logger.critical("Avahi Error", exc_info=error)
2040
3478
cleanup()
2041
3479
sys.exit(1)
2042
3480
except KeyboardInterrupt:
2047
3485
# Must run before the D-Bus bus name gets deregistered
2048
3486
cleanup()
2049
3487
3488
2050
3489
if __name__ == '__main__':
2051
3490
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0