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 494
- compare with another revision
- download diff
- download tarball
- view history from revision 494
- Committer: Teddy Hogeborn
- Date: 2011-08-17 22:27:13 UTC
- Revision ID: teddy@fukt.bsnet.se-20110817222713-xemqfzafjciuaqkz
* mandos-keygen: Loop until passwords match when run interactively.
- files removed:
- bugs.xml
- debian/upstream
- network-hooks.d
- plugin-helpers
- files modified:
- .bzrignore
added
removed
mandos
1
1
#!/usr/bin/python
2
2
# -*- mode: python; coding: utf-8 -*-
3
#
3
#
4
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 © 2008-2018 Teddy Hogeborn
15
# Copyright © 2008-2018 Björn Påhlsson
16
#
17
# This file is part of Mandos.
18
#
19
# Mandos is free software: you can redistribute it and/or modify it
20
# under the terms of the GNU General Public License as published by
14
# Copyright © 2008-2011 Teddy Hogeborn
15
# Copyright © 2008-2011 Björn Påhlsson
16
#
17
# This program is free software: you can redistribute it and/or modify
18
# it under the terms of the GNU General Public License as published by
21
19
# the Free Software Foundation, either version 3 of the License, or
22
20
# (at your option) any later version.
23
21
#
24
# Mandos is distributed in the hope that it will be useful, but
25
# WITHOUT ANY WARRANTY; without even the implied warranty of
22
# This program is distributed in the hope that it will be useful,
23
# but WITHOUT ANY WARRANTY; without even the implied warranty of
26
24
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
27
25
# GNU General Public License for more details.
28
#
26
#
29
27
# You should have received a copy of the GNU General Public License
30
# along with Mandos. If not, see <http://www.gnu.org/licenses/>.
31
#
32
# Contact the authors at <mandos@recompile.se>.
33
#
28
# along with this program. If not, see
29
# <http://www.gnu.org/licenses/>.
30
#
31
# Contact the authors at <mandos@fukt.bsnet.se>.
32
#
34
33
35
34
from __future__ import (division, absolute_import, print_function,
36
35
unicode_literals)
37
36
38
try:
39
from future_builtins import *
40
except ImportError:
41
pass
42
43
try:
44
import SocketServer as socketserver
45
except ImportError:
46
import socketserver
37
import SocketServer as socketserver
47
38
import socket
48
39
import argparse
49
40
import datetime
50
41
import errno
51
try:
52
import ConfigParser as configparser
53
except ImportError:
54
import configparser
42
import gnutls.crypto
43
import gnutls.connection
44
import gnutls.errors
45
import gnutls.library.functions
46
import gnutls.library.constants
47
import gnutls.library.types
48
import ConfigParser as configparser
55
49
import sys
56
50
import re
57
51
import os
66
60
import struct
67
61
import fcntl
68
62
import functools
69
try:
70
import cPickle as pickle
71
except ImportError:
72
import pickle
63
import cPickle as pickle
73
64
import multiprocessing
74
import types
75
import binascii
76
import tempfile
77
import itertools
78
import collections
79
import codecs
80
65
81
66
import dbus
82
67
import dbus.service
83
from gi.repository import GLib
68
import gobject
69
import avahi
84
70
from dbus.mainloop.glib import DBusGMainLoop
85
71
import ctypes
86
72
import ctypes.util
87
73
import xml.dom.minidom
88
74
import inspect
89
75
90
# Try to find the value of SO_BINDTODEVICE:
91
76
try:
92
# This is where SO_BINDTODEVICE is in Python 3.3 (or 3.4?) and
93
# newer, and it is also the most natural place for it:
94
77
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
95
78
except AttributeError:
96
79
try:
97
# This is where SO_BINDTODEVICE was up to and including Python
98
# 2.6, and also 3.2:
99
80
from IN import SO_BINDTODEVICE
100
81
except ImportError:
101
# In Python 2.7 it seems to have been removed entirely.
102
# Try running the C preprocessor:
103
try:
104
cc = subprocess.Popen(["cc", "--language=c", "-E",
105
"/dev/stdin"],
106
stdin=subprocess.PIPE,
107
stdout=subprocess.PIPE)
108
stdout = cc.communicate(
109
"#include <sys/socket.h>\nSO_BINDTODEVICE\n")[0]
110
SO_BINDTODEVICE = int(stdout.splitlines()[-1])
111
except (OSError, ValueError, IndexError):
112
# No value found
113
SO_BINDTODEVICE = None
114
115
if sys.version_info.major == 2:
116
str = unicode
117
118
version = "1.7.19"
119
stored_state_file = "clients.pickle"
120
121
logger = logging.getLogger()
122
syslogger = None
123
124
try:
125
if_nametoindex = ctypes.cdll.LoadLibrary(
126
ctypes.util.find_library("c")).if_nametoindex
127
except (OSError, AttributeError):
128
129
def if_nametoindex(interface):
130
"Get an interface index the hard way, i.e. using fcntl()"
131
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
132
with contextlib.closing(socket.socket()) as s:
133
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
134
struct.pack(b"16s16x", interface))
135
interface_index = struct.unpack("I", ifreq[16:20])[0]
136
return interface_index
137
138
139
def copy_function(func):
140
"""Make a copy of a function"""
141
if sys.version_info.major == 2:
142
return types.FunctionType(func.func_code,
143
func.func_globals,
144
func.func_name,
145
func.func_defaults,
146
func.func_closure)
147
else:
148
return types.FunctionType(func.__code__,
149
func.__globals__,
150
func.__name__,
151
func.__defaults__,
152
func.__closure__)
153
154
155
def initlogger(debug, level=logging.WARNING):
156
"""init logger and add loglevel"""
157
158
global syslogger
159
syslogger = (logging.handlers.SysLogHandler(
160
facility=logging.handlers.SysLogHandler.LOG_DAEMON,
161
address="/dev/log"))
162
syslogger.setFormatter(logging.Formatter
163
('Mandos [%(process)d]: %(levelname)s:'
164
' %(message)s'))
165
logger.addHandler(syslogger)
166
167
if debug:
168
console = logging.StreamHandler()
169
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
170
' [%(process)d]:'
171
' %(levelname)s:'
172
' %(message)s'))
173
logger.addHandler(console)
174
logger.setLevel(level)
175
176
177
class PGPError(Exception):
178
"""Exception if encryption/decryption fails"""
179
pass
180
181
182
class PGPEngine(object):
183
"""A simple class for OpenPGP symmetric encryption & decryption"""
184
185
def __init__(self):
186
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
187
self.gpg = "gpg"
188
try:
189
output = subprocess.check_output(["gpgconf"])
190
for line in output.splitlines():
191
name, text, path = line.split(b":")
192
if name == "gpg":
193
self.gpg = path
194
break
195
except OSError as e:
196
if e.errno != errno.ENOENT:
197
raise
198
self.gnupgargs = ['--batch',
199
'--homedir', self.tempdir,
200
'--force-mdc',
201
'--quiet']
202
# Only GPG version 1 has the --no-use-agent option.
203
if self.gpg == "gpg" or self.gpg.endswith("/gpg"):
204
self.gnupgargs.append("--no-use-agent")
205
206
def __enter__(self):
207
return self
208
209
def __exit__(self, exc_type, exc_value, traceback):
210
self._cleanup()
211
return False
212
213
def __del__(self):
214
self._cleanup()
215
216
def _cleanup(self):
217
if self.tempdir is not None:
218
# Delete contents of tempdir
219
for root, dirs, files in os.walk(self.tempdir,
220
topdown=False):
221
for filename in files:
222
os.remove(os.path.join(root, filename))
223
for dirname in dirs:
224
os.rmdir(os.path.join(root, dirname))
225
# Remove tempdir
226
os.rmdir(self.tempdir)
227
self.tempdir = None
228
229
def password_encode(self, password):
230
# Passphrase can not be empty and can not contain newlines or
231
# NUL bytes. So we prefix it and hex encode it.
232
encoded = b"mandos" + binascii.hexlify(password)
233
if len(encoded) > 2048:
234
# GnuPG can't handle long passwords, so encode differently
235
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
236
.replace(b"\n", b"\\n")
237
.replace(b"\0", b"\\x00"))
238
return encoded
239
240
def encrypt(self, data, password):
241
passphrase = self.password_encode(password)
242
with tempfile.NamedTemporaryFile(
243
dir=self.tempdir) as passfile:
244
passfile.write(passphrase)
245
passfile.flush()
246
proc = subprocess.Popen([self.gpg, '--symmetric',
247
'--passphrase-file',
248
passfile.name]
249
+ self.gnupgargs,
250
stdin=subprocess.PIPE,
251
stdout=subprocess.PIPE,
252
stderr=subprocess.PIPE)
253
ciphertext, err = proc.communicate(input=data)
254
if proc.returncode != 0:
255
raise PGPError(err)
256
return ciphertext
257
258
def decrypt(self, data, password):
259
passphrase = self.password_encode(password)
260
with tempfile.NamedTemporaryFile(
261
dir=self.tempdir) as passfile:
262
passfile.write(passphrase)
263
passfile.flush()
264
proc = subprocess.Popen([self.gpg, '--decrypt',
265
'--passphrase-file',
266
passfile.name]
267
+ self.gnupgargs,
268
stdin=subprocess.PIPE,
269
stdout=subprocess.PIPE,
270
stderr=subprocess.PIPE)
271
decrypted_plaintext, err = proc.communicate(input=data)
272
if proc.returncode != 0:
273
raise PGPError(err)
274
return decrypted_plaintext
275
276
277
# Pretend that we have an Avahi module
278
class Avahi(object):
279
"""This isn't so much a class as it is a module-like namespace.
280
It is instantiated once, and simulates having an Avahi module."""
281
IF_UNSPEC = -1 # avahi-common/address.h
282
PROTO_UNSPEC = -1 # avahi-common/address.h
283
PROTO_INET = 0 # avahi-common/address.h
284
PROTO_INET6 = 1 # avahi-common/address.h
285
DBUS_NAME = "org.freedesktop.Avahi"
286
DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"
287
DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"
288
DBUS_PATH_SERVER = "/"
289
290
def string_array_to_txt_array(self, t):
291
return dbus.Array((dbus.ByteArray(s.encode("utf-8"))
292
for s in t), signature="ay")
293
ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h
294
ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h
295
ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h
296
SERVER_INVALID = 0 # avahi-common/defs.h
297
SERVER_REGISTERING = 1 # avahi-common/defs.h
298
SERVER_RUNNING = 2 # avahi-common/defs.h
299
SERVER_COLLISION = 3 # avahi-common/defs.h
300
SERVER_FAILURE = 4 # avahi-common/defs.h
301
avahi = Avahi()
302
82
SO_BINDTODEVICE = None
83
84
85
version = "1.3.1"
86
87
#logger = logging.getLogger('mandos')
88
logger = logging.Logger('mandos')
89
syslogger = (logging.handlers.SysLogHandler
90
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
91
address = str("/dev/log")))
92
syslogger.setFormatter(logging.Formatter
93
('Mandos [%(process)d]: %(levelname)s:'
94
' %(message)s'))
95
logger.addHandler(syslogger)
96
97
console = logging.StreamHandler()
98
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
99
' %(levelname)s:'
100
' %(message)s'))
101
logger.addHandler(console)
303
102
304
103
class AvahiError(Exception):
305
104
def __init__(self, value, *args, **kwargs):
306
105
self.value = value
307
return super(AvahiError, self).__init__(value, *args,
308
**kwargs)
309
106
super(AvahiError, self).__init__(value, *args, **kwargs)
107
def __unicode__(self):
108
return unicode(repr(self.value))
310
109
311
110
class AvahiServiceError(AvahiError):
312
111
pass
313
112
314
315
113
class AvahiGroupError(AvahiError):
316
114
pass
317
115
318
116
319
117
class AvahiService(object):
320
118
"""An Avahi (Zeroconf) service.
321
119
322
120
Attributes:
323
121
interface: integer; avahi.IF_UNSPEC or an interface index.
324
122
Used to optionally bind to the specified interface.
325
123
name: string; Example: 'Mandos'
326
124
type: string; Example: '_mandos._tcp'.
327
See <https://www.iana.org/assignments/service-names-port-numbers>
125
See <http://www.dns-sd.org/ServiceTypes.html>
328
126
port: integer; what port to announce
329
127
TXT: list of strings; TXT record for the service
330
128
domain: string; Domain to publish on, default to .local if empty.
336
134
server: D-Bus Server
337
135
bus: dbus.SystemBus()
338
136
"""
339
340
def __init__(self,
341
interface=avahi.IF_UNSPEC,
342
name=None,
343
servicetype=None,
344
port=None,
345
TXT=None,
346
domain="",
347
host="",
348
max_renames=32768,
349
protocol=avahi.PROTO_UNSPEC,
350
bus=None):
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):
351
141
self.interface = interface
352
142
self.name = name
353
143
self.type = servicetype
362
152
self.server = None
363
153
self.bus = bus
364
154
self.entry_group_state_changed_match = None
365
366
def rename(self, remove=True):
155
def rename(self):
367
156
"""Derived from the Avahi example code"""
368
157
if self.rename_count >= self.max_renames:
369
158
logger.critical("No suitable Zeroconf service name found"
370
159
" after %i retries, exiting.",
371
160
self.rename_count)
372
161
raise AvahiServiceError("Too many renames")
373
self.name = str(
374
self.server.GetAlternativeServiceName(self.name))
375
self.rename_count += 1
162
self.name = unicode(self.server.GetAlternativeServiceName(self.name))
376
163
logger.info("Changing Zeroconf service name to %r ...",
377
164
self.name)
378
if remove:
379
self.remove()
165
syslogger.setFormatter(logging.Formatter
166
('Mandos (%s) [%%(process)d]:'
167
' %%(levelname)s: %%(message)s'
168
% self.name))
169
self.remove()
380
170
try:
381
171
self.add()
382
172
except dbus.exceptions.DBusException as error:
383
if (error.get_dbus_name()
384
== "org.freedesktop.Avahi.CollisionError"):
385
logger.info("Local Zeroconf service name collision.")
386
return self.rename(remove=False)
387
else:
388
logger.critical("D-Bus Exception", exc_info=error)
389
self.cleanup()
390
os._exit(1)
391
173
logger.critical("DBusException: %s", error)
174
self.cleanup()
175
os._exit(1)
176
self.rename_count += 1
392
177
def remove(self):
393
178
"""Derived from the Avahi example code"""
394
179
if self.entry_group_state_changed_match is not None:
396
181
self.entry_group_state_changed_match = None
397
182
if self.group is not None:
398
183
self.group.Reset()
399
400
184
def add(self):
401
185
"""Derived from the Avahi example code"""
402
186
self.remove()
407
191
avahi.DBUS_INTERFACE_ENTRY_GROUP)
408
192
self.entry_group_state_changed_match = (
409
193
self.group.connect_to_signal(
410
'StateChanged', self.entry_group_state_changed))
194
'StateChanged', self .entry_group_state_changed))
411
195
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
412
196
self.name, self.type)
413
197
self.group.AddService(
419
203
dbus.UInt16(self.port),
420
204
avahi.string_array_to_txt_array(self.TXT))
421
205
self.group.Commit()
422
423
206
def entry_group_state_changed(self, state, error):
424
207
"""Derived from the Avahi example code"""
425
208
logger.debug("Avahi entry group state change: %i", state)
426
209
427
210
if state == avahi.ENTRY_GROUP_ESTABLISHED:
428
211
logger.debug("Zeroconf service established.")
429
212
elif state == avahi.ENTRY_GROUP_COLLISION:
431
214
self.rename()
432
215
elif state == avahi.ENTRY_GROUP_FAILURE:
433
216
logger.critical("Avahi: Error in group state changed %s",
434
str(error))
435
raise AvahiGroupError("State changed: {!s}".format(error))
436
217
unicode(error))
218
raise AvahiGroupError("State changed: %s"
219
% unicode(error))
437
220
def cleanup(self):
438
221
"""Derived from the Avahi example code"""
439
222
if self.group is not None:
440
223
try:
441
224
self.group.Free()
442
225
except (dbus.exceptions.UnknownMethodException,
443
dbus.exceptions.DBusException):
226
dbus.exceptions.DBusException) as e:
444
227
pass
445
228
self.group = None
446
229
self.remove()
447
448
230
def server_state_changed(self, state, error=None):
449
231
"""Derived from the Avahi example code"""
450
232
logger.debug("Avahi server state change: %i", state)
451
bad_states = {
452
avahi.SERVER_INVALID: "Zeroconf server invalid",
453
avahi.SERVER_REGISTERING: None,
454
avahi.SERVER_COLLISION: "Zeroconf server name collision",
455
avahi.SERVER_FAILURE: "Zeroconf server failure",
456
}
233
bad_states = { avahi.SERVER_INVALID:
234
"Zeroconf server invalid",
235
avahi.SERVER_REGISTERING: None,
236
avahi.SERVER_COLLISION:
237
"Zeroconf server name collision",
238
avahi.SERVER_FAILURE:
239
"Zeroconf server failure" }
457
240
if state in bad_states:
458
241
if bad_states[state] is not None:
459
242
if error is None:
462
245
logger.error(bad_states[state] + ": %r", error)
463
246
self.cleanup()
464
247
elif state == avahi.SERVER_RUNNING:
465
try:
466
self.add()
467
except dbus.exceptions.DBusException as error:
468
if (error.get_dbus_name()
469
== "org.freedesktop.Avahi.CollisionError"):
470
logger.info("Local Zeroconf service name"
471
" collision.")
472
return self.rename(remove=False)
473
else:
474
logger.critical("D-Bus Exception", exc_info=error)
475
self.cleanup()
476
os._exit(1)
248
self.add()
477
249
else:
478
250
if error is None:
479
251
logger.debug("Unknown state: %r", state)
480
252
else:
481
253
logger.debug("Unknown state: %r: %r", state, error)
482
483
254
def activate(self):
484
255
"""Derived from the Avahi example code"""
485
256
if self.server is None:
489
260
follow_name_owner_changes=True),
490
261
avahi.DBUS_INTERFACE_SERVER)
491
262
self.server.connect_to_signal("StateChanged",
492
self.server_state_changed)
263
self.server_state_changed)
493
264
self.server_state_changed(self.server.GetState())
494
265
495
266
496
class AvahiServiceToSyslog(AvahiService):
497
def rename(self, *args, **kwargs):
498
"""Add the new name to the syslog messages"""
499
ret = super(AvahiServiceToSyslog, self).rename(*args, **kwargs)
500
syslogger.setFormatter(logging.Formatter(
501
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
502
.format(self.name)))
503
return ret
504
505
506
# Pretend that we have a GnuTLS module
507
class GnuTLS(object):
508
"""This isn't so much a class as it is a module-like namespace.
509
It is instantiated once, and simulates having a GnuTLS module."""
510
511
library = ctypes.util.find_library("gnutls")
512
if library is None:
513
library = ctypes.util.find_library("gnutls-deb0")
514
_library = ctypes.cdll.LoadLibrary(library)
515
del library
516
_need_version = b"3.3.0"
517
518
def __init__(self):
519
# Need to use "self" here, since this method is called before
520
# the assignment to the "gnutls" global variable happens.
521
if self.check_version(self._need_version) is None:
522
raise self.Error("Needs GnuTLS {} or later"
523
.format(self._need_version))
524
525
# Unless otherwise indicated, the constants and types below are
526
# all from the gnutls/gnutls.h C header file.
527
528
# Constants
529
E_SUCCESS = 0
530
E_INTERRUPTED = -52
531
E_AGAIN = -28
532
CRT_OPENPGP = 2
533
CLIENT = 2
534
SHUT_RDWR = 0
535
CRD_CERTIFICATE = 1
536
E_NO_CERTIFICATE_FOUND = -49
537
OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
538
539
# Types
540
class session_int(ctypes.Structure):
541
_fields_ = []
542
session_t = ctypes.POINTER(session_int)
543
544
class certificate_credentials_st(ctypes.Structure):
545
_fields_ = []
546
certificate_credentials_t = ctypes.POINTER(
547
certificate_credentials_st)
548
certificate_type_t = ctypes.c_int
549
550
class datum_t(ctypes.Structure):
551
_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
552
('size', ctypes.c_uint)]
553
554
class openpgp_crt_int(ctypes.Structure):
555
_fields_ = []
556
openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
557
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
558
log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
559
credentials_type_t = ctypes.c_int
560
transport_ptr_t = ctypes.c_void_p
561
close_request_t = ctypes.c_int
562
563
# Exceptions
564
class Error(Exception):
565
# We need to use the class name "GnuTLS" here, since this
566
# exception might be raised from within GnuTLS.__init__,
567
# which is called before the assignment to the "gnutls"
568
# global variable has happened.
569
def __init__(self, message=None, code=None, args=()):
570
# Default usage is by a message string, but if a return
571
# code is passed, convert it to a string with
572
# gnutls.strerror()
573
self.code = code
574
if message is None and code is not None:
575
message = GnuTLS.strerror(code)
576
return super(GnuTLS.Error, self).__init__(
577
message, *args)
578
579
class CertificateSecurityError(Error):
580
pass
581
582
# Classes
583
class Credentials(object):
584
def __init__(self):
585
self._c_object = gnutls.certificate_credentials_t()
586
gnutls.certificate_allocate_credentials(
587
ctypes.byref(self._c_object))
588
self.type = gnutls.CRD_CERTIFICATE
589
590
def __del__(self):
591
gnutls.certificate_free_credentials(self._c_object)
592
593
class ClientSession(object):
594
def __init__(self, socket, credentials=None):
595
self._c_object = gnutls.session_t()
596
gnutls.init(ctypes.byref(self._c_object), gnutls.CLIENT)
597
gnutls.set_default_priority(self._c_object)
598
gnutls.transport_set_ptr(self._c_object, socket.fileno())
599
gnutls.handshake_set_private_extensions(self._c_object,
600
True)
601
self.socket = socket
602
if credentials is None:
603
credentials = gnutls.Credentials()
604
gnutls.credentials_set(self._c_object, credentials.type,
605
ctypes.cast(credentials._c_object,
606
ctypes.c_void_p))
607
self.credentials = credentials
608
609
def __del__(self):
610
gnutls.deinit(self._c_object)
611
612
def handshake(self):
613
return gnutls.handshake(self._c_object)
614
615
def send(self, data):
616
data = bytes(data)
617
data_len = len(data)
618
while data_len > 0:
619
data_len -= gnutls.record_send(self._c_object,
620
data[-data_len:],
621
data_len)
622
623
def bye(self):
624
return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
625
626
# Error handling functions
627
def _error_code(result):
628
"""A function to raise exceptions on errors, suitable
629
for the 'restype' attribute on ctypes functions"""
630
if result >= 0:
631
return result
632
if result == gnutls.E_NO_CERTIFICATE_FOUND:
633
raise gnutls.CertificateSecurityError(code=result)
634
raise gnutls.Error(code=result)
635
636
def _retry_on_error(result, func, arguments):
637
"""A function to retry on some errors, suitable
638
for the 'errcheck' attribute on ctypes functions"""
639
while result < 0:
640
if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
641
return _error_code(result)
642
result = func(*arguments)
643
return result
644
645
# Unless otherwise indicated, the function declarations below are
646
# all from the gnutls/gnutls.h C header file.
647
648
# Functions
649
priority_set_direct = _library.gnutls_priority_set_direct
650
priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
651
ctypes.POINTER(ctypes.c_char_p)]
652
priority_set_direct.restype = _error_code
653
654
init = _library.gnutls_init
655
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
656
init.restype = _error_code
657
658
set_default_priority = _library.gnutls_set_default_priority
659
set_default_priority.argtypes = [session_t]
660
set_default_priority.restype = _error_code
661
662
record_send = _library.gnutls_record_send
663
record_send.argtypes = [session_t, ctypes.c_void_p,
664
ctypes.c_size_t]
665
record_send.restype = ctypes.c_ssize_t
666
record_send.errcheck = _retry_on_error
667
668
certificate_allocate_credentials = (
669
_library.gnutls_certificate_allocate_credentials)
670
certificate_allocate_credentials.argtypes = [
671
ctypes.POINTER(certificate_credentials_t)]
672
certificate_allocate_credentials.restype = _error_code
673
674
certificate_free_credentials = (
675
_library.gnutls_certificate_free_credentials)
676
certificate_free_credentials.argtypes = [
677
certificate_credentials_t]
678
certificate_free_credentials.restype = None
679
680
handshake_set_private_extensions = (
681
_library.gnutls_handshake_set_private_extensions)
682
handshake_set_private_extensions.argtypes = [session_t,
683
ctypes.c_int]
684
handshake_set_private_extensions.restype = None
685
686
credentials_set = _library.gnutls_credentials_set
687
credentials_set.argtypes = [session_t, credentials_type_t,
688
ctypes.c_void_p]
689
credentials_set.restype = _error_code
690
691
strerror = _library.gnutls_strerror
692
strerror.argtypes = [ctypes.c_int]
693
strerror.restype = ctypes.c_char_p
694
695
certificate_type_get = _library.gnutls_certificate_type_get
696
certificate_type_get.argtypes = [session_t]
697
certificate_type_get.restype = _error_code
698
699
certificate_get_peers = _library.gnutls_certificate_get_peers
700
certificate_get_peers.argtypes = [session_t,
701
ctypes.POINTER(ctypes.c_uint)]
702
certificate_get_peers.restype = ctypes.POINTER(datum_t)
703
704
global_set_log_level = _library.gnutls_global_set_log_level
705
global_set_log_level.argtypes = [ctypes.c_int]
706
global_set_log_level.restype = None
707
708
global_set_log_function = _library.gnutls_global_set_log_function
709
global_set_log_function.argtypes = [log_func]
710
global_set_log_function.restype = None
711
712
deinit = _library.gnutls_deinit
713
deinit.argtypes = [session_t]
714
deinit.restype = None
715
716
handshake = _library.gnutls_handshake
717
handshake.argtypes = [session_t]
718
handshake.restype = _error_code
719
handshake.errcheck = _retry_on_error
720
721
transport_set_ptr = _library.gnutls_transport_set_ptr
722
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
723
transport_set_ptr.restype = None
724
725
bye = _library.gnutls_bye
726
bye.argtypes = [session_t, close_request_t]
727
bye.restype = _error_code
728
bye.errcheck = _retry_on_error
729
730
check_version = _library.gnutls_check_version
731
check_version.argtypes = [ctypes.c_char_p]
732
check_version.restype = ctypes.c_char_p
733
734
# All the function declarations below are from gnutls/openpgp.h
735
736
openpgp_crt_init = _library.gnutls_openpgp_crt_init
737
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
738
openpgp_crt_init.restype = _error_code
739
740
openpgp_crt_import = _library.gnutls_openpgp_crt_import
741
openpgp_crt_import.argtypes = [openpgp_crt_t,
742
ctypes.POINTER(datum_t),
743
openpgp_crt_fmt_t]
744
openpgp_crt_import.restype = _error_code
745
746
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
747
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
748
ctypes.POINTER(ctypes.c_uint)]
749
openpgp_crt_verify_self.restype = _error_code
750
751
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
752
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
753
openpgp_crt_deinit.restype = None
754
755
openpgp_crt_get_fingerprint = (
756
_library.gnutls_openpgp_crt_get_fingerprint)
757
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
758
ctypes.c_void_p,
759
ctypes.POINTER(
760
ctypes.c_size_t)]
761
openpgp_crt_get_fingerprint.restype = _error_code
762
763
# Remove non-public functions
764
del _error_code, _retry_on_error
765
# Create the global "gnutls" object, simulating a module
766
gnutls = GnuTLS()
767
768
769
def call_pipe(connection, # : multiprocessing.Connection
770
func, *args, **kwargs):
771
"""This function is meant to be called by multiprocessing.Process
772
773
This function runs func(*args, **kwargs), and writes the resulting
774
return value on the provided multiprocessing.Connection.
775
"""
776
connection.send(func(*args, **kwargs))
777
connection.close()
778
779
780
267
class Client(object):
781
268
"""A representation of a client host served by this server.
782
269
783
270
Attributes:
784
approved: bool(); 'None' if not yet approved/disapproved
271
_approved: bool(); 'None' if not yet approved/disapproved
785
272
approval_delay: datetime.timedelta(); Time to wait for approval
786
273
approval_duration: datetime.timedelta(); Duration of one approval
787
274
checker: subprocess.Popen(); a running checker process used
788
275
to see if the client lives.
789
276
'None' if no process is running.
790
checker_callback_tag: a GLib event source tag, or None
277
checker_callback_tag: a gobject event source tag, or None
791
278
checker_command: string; External command which is run to check
792
279
if client lives. %() expansions are done at
793
280
runtime with vars(self) as dict, so that for
794
281
instance %(name)s can be used in the command.
795
checker_initiator_tag: a GLib event source tag, or None
282
checker_initiator_tag: a gobject event source tag, or None
796
283
created: datetime.datetime(); (UTC) object creation
797
client_structure: Object describing what attributes a client has
798
and is used for storing the client at exit
799
284
current_checker_command: string; current running checker_command
800
disable_initiator_tag: a GLib event source tag, or None
285
disable_hook: If set, called by disable() as disable_hook(self)
286
disable_initiator_tag: a gobject event source tag, or None
801
287
enabled: bool()
802
288
fingerprint: string (40 or 32 hexadecimal digits); used to
803
289
uniquely identify the client
805
291
interval: datetime.timedelta(); How often to start a new checker
806
292
last_approval_request: datetime.datetime(); (UTC) or None
807
293
last_checked_ok: datetime.datetime(); (UTC) or None
808
last_checker_status: integer between 0 and 255 reflecting exit
809
status of last checker. -1 reflects crashed
810
checker, -2 means no checker completed yet.
811
last_checker_signal: The signal which killed the last checker, if
812
last_checker_status is -1
813
last_enabled: datetime.datetime(); (UTC) or None
294
last_enabled: datetime.datetime(); (UTC)
814
295
name: string; from the config file, used in log messages and
815
296
D-Bus identifiers
816
297
secret: bytestring; sent verbatim (over TLS) to client
817
298
timeout: datetime.timedelta(); How long from last_checked_ok
818
299
until this client is disabled
819
extended_timeout: extra long timeout when secret has been sent
820
300
runtime_expansions: Allowed attributes for runtime expansion.
821
expires: datetime.datetime(); time (UTC) when a client will be
822
disabled, or None
823
server_settings: The server_settings dict from main()
824
301
"""
825
302
826
303
runtime_expansions = ("approval_delay", "approval_duration",
827
"created", "enabled", "expires",
828
"fingerprint", "host", "interval",
829
"last_approval_request", "last_checked_ok",
304
"created", "enabled", "fingerprint",
305
"host", "interval", "last_checked_ok",
830
306
"last_enabled", "name", "timeout")
831
client_defaults = {
832
"timeout": "PT5M",
833
"extended_timeout": "PT15M",
834
"interval": "PT2M",
835
"checker": "fping -q -- %%(host)s",
836
"host": "",
837
"approval_delay": "PT0S",
838
"approval_duration": "PT1S",
839
"approved_by_default": "True",
840
"enabled": "True",
841
}
842
307
843
308
@staticmethod
844
def config_parser(config):
845
"""Construct a new dict of client settings of this form:
846
{ client_name: {setting_name: value, ...}, ...}
847
with exceptions for any special settings as defined above.
848
NOTE: Must be a pure function. Must return the same result
849
value given the same arguments.
850
"""
851
settings = {}
852
for client_name in config.sections():
853
section = dict(config.items(client_name))
854
client = settings[client_name] = {}
855
856
client["host"] = section["host"]
857
# Reformat values from string types to Python types
858
client["approved_by_default"] = config.getboolean(
859
client_name, "approved_by_default")
860
client["enabled"] = config.getboolean(client_name,
861
"enabled")
862
863
# Uppercase and remove spaces from fingerprint for later
864
# comparison purposes with return value from the
865
# fingerprint() function
866
client["fingerprint"] = (section["fingerprint"].upper()
867
.replace(" ", ""))
868
if "secret" in section:
869
client["secret"] = codecs.decode(section["secret"]
870
.encode("utf-8"),
871
"base64")
872
elif "secfile" in section:
873
with open(os.path.expanduser(os.path.expandvars
874
(section["secfile"])),
875
"rb") as secfile:
876
client["secret"] = secfile.read()
877
else:
878
raise TypeError("No secret or secfile for section {}"
879
.format(section))
880
client["timeout"] = string_to_delta(section["timeout"])
881
client["extended_timeout"] = string_to_delta(
882
section["extended_timeout"])
883
client["interval"] = string_to_delta(section["interval"])
884
client["approval_delay"] = string_to_delta(
885
section["approval_delay"])
886
client["approval_duration"] = string_to_delta(
887
section["approval_duration"])
888
client["checker_command"] = section["checker"]
889
client["last_approval_request"] = None
890
client["last_checked_ok"] = None
891
client["last_checker_status"] = -2
892
893
return settings
894
895
def __init__(self, settings, name=None, server_settings=None):
309
def _timedelta_to_milliseconds(td):
310
"Convert a datetime.timedelta() to milliseconds"
311
return ((td.days * 24 * 60 * 60 * 1000)
312
+ (td.seconds * 1000)
313
+ (td.microseconds // 1000))
314
315
def timeout_milliseconds(self):
316
"Return the 'timeout' attribute in milliseconds"
317
return self._timedelta_to_milliseconds(self.timeout)
318
319
def interval_milliseconds(self):
320
"Return the 'interval' attribute in milliseconds"
321
return self._timedelta_to_milliseconds(self.interval)
322
323
def approval_delay_milliseconds(self):
324
return self._timedelta_to_milliseconds(self.approval_delay)
325
326
def __init__(self, name = None, disable_hook=None, config=None):
327
"""Note: the 'checker' key in 'config' sets the
328
'checker_command' attribute and *not* the 'checker'
329
attribute."""
896
330
self.name = name
897
if server_settings is None:
898
server_settings = {}
899
self.server_settings = server_settings
900
# adding all client settings
901
for setting, value in settings.items():
902
setattr(self, setting, value)
903
904
if self.enabled:
905
if not hasattr(self, "last_enabled"):
906
self.last_enabled = datetime.datetime.utcnow()
907
if not hasattr(self, "expires"):
908
self.expires = (datetime.datetime.utcnow()
909
+ self.timeout)
910
else:
911
self.last_enabled = None
912
self.expires = None
913
331
if config is None:
332
config = {}
914
333
logger.debug("Creating client %r", self.name)
334
# Uppercase and remove spaces from fingerprint for later
335
# comparison purposes with return value from the fingerprint()
336
# function
337
self.fingerprint = (config["fingerprint"].upper()
338
.replace(" ", ""))
915
339
logger.debug(" Fingerprint: %s", self.fingerprint)
916
self.created = settings.get("created",
917
datetime.datetime.utcnow())
918
919
# attributes specific for this server instance
340
if "secret" in config:
341
self.secret = config["secret"].decode("base64")
342
elif "secfile" in config:
343
with open(os.path.expanduser(os.path.expandvars
344
(config["secfile"])),
345
"rb") as secfile:
346
self.secret = secfile.read()
347
else:
348
raise TypeError("No secret or secfile for client %s"
349
% self.name)
350
self.host = config.get("host", "")
351
self.created = datetime.datetime.utcnow()
352
self.enabled = False
353
self.last_approval_request = None
354
self.last_enabled = None
355
self.last_checked_ok = None
356
self.timeout = string_to_delta(config["timeout"])
357
self.interval = string_to_delta(config["interval"])
358
self.disable_hook = disable_hook
920
359
self.checker = None
921
360
self.checker_initiator_tag = None
922
361
self.disable_initiator_tag = None
923
362
self.checker_callback_tag = None
363
self.checker_command = config["checker"]
924
364
self.current_checker_command = None
925
self.approved = None
365
self.last_connect = None
366
self._approved = None
367
self.approved_by_default = config.get("approved_by_default",
368
True)
926
369
self.approvals_pending = 0
927
self.changedstate = multiprocessing_manager.Condition(
928
multiprocessing_manager.Lock())
929
self.client_structure = [attr
930
for attr in self.__dict__.keys()
931
if not attr.startswith("_")]
932
self.client_structure.append("client_structure")
933
934
for name, t in inspect.getmembers(
935
type(self), lambda obj: isinstance(obj, property)):
936
if not name.startswith("_"):
937
self.client_structure.append(name)
938
939
# Send notice to process children that client state has changed
370
self.approval_delay = string_to_delta(
371
config["approval_delay"])
372
self.approval_duration = string_to_delta(
373
config["approval_duration"])
374
self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())
375
940
376
def send_changedstate(self):
941
with self.changedstate:
942
self.changedstate.notify_all()
943
377
self.changedstate.acquire()
378
self.changedstate.notify_all()
379
self.changedstate.release()
380
944
381
def enable(self):
945
382
"""Start this client's checker and timeout hooks"""
946
383
if getattr(self, "enabled", False):
947
384
# Already enabled
948
385
return
949
self.expires = datetime.datetime.utcnow() + self.timeout
950
self.enabled = True
386
self.send_changedstate()
951
387
self.last_enabled = datetime.datetime.utcnow()
952
self.init_checker()
953
self.send_changedstate()
954
388
# Schedule a new checker to be started an 'interval' from now,
389
# and every interval from then on.
390
self.checker_initiator_tag = (gobject.timeout_add
391
(self.interval_milliseconds(),
392
self.start_checker))
393
# Schedule a disable() when 'timeout' has passed
394
self.disable_initiator_tag = (gobject.timeout_add
395
(self.timeout_milliseconds(),
396
self.disable))
397
self.enabled = True
398
# Also start a new checker *right now*.
399
self.start_checker()
400
955
401
def disable(self, quiet=True):
956
402
"""Disable this client."""
957
403
if not getattr(self, "enabled", False):
958
404
return False
959
405
if not quiet:
406
self.send_changedstate()
407
if not quiet:
960
408
logger.info("Disabling client %s", self.name)
961
if getattr(self, "disable_initiator_tag", None) is not None:
962
GLib.source_remove(self.disable_initiator_tag)
409
if getattr(self, "disable_initiator_tag", False):
410
gobject.source_remove(self.disable_initiator_tag)
963
411
self.disable_initiator_tag = None
964
self.expires = None
965
if getattr(self, "checker_initiator_tag", None) is not None:
966
GLib.source_remove(self.checker_initiator_tag)
412
if getattr(self, "checker_initiator_tag", False):
413
gobject.source_remove(self.checker_initiator_tag)
967
414
self.checker_initiator_tag = None
968
415
self.stop_checker()
416
if self.disable_hook:
417
self.disable_hook(self)
969
418
self.enabled = False
970
if not quiet:
971
self.send_changedstate()
972
# Do not run this again if called by a GLib.timeout_add
419
# Do not run this again if called by a gobject.timeout_add
973
420
return False
974
421
975
422
def __del__(self):
423
self.disable_hook = None
976
424
self.disable()
977
978
def init_checker(self):
979
# Schedule a new checker to be started an 'interval' from now,
980
# and every interval from then on.
981
if self.checker_initiator_tag is not None:
982
GLib.source_remove(self.checker_initiator_tag)
983
self.checker_initiator_tag = GLib.timeout_add(
984
int(self.interval.total_seconds() * 1000),
985
self.start_checker)
986
# Schedule a disable() when 'timeout' has passed
987
if self.disable_initiator_tag is not None:
988
GLib.source_remove(self.disable_initiator_tag)
989
self.disable_initiator_tag = GLib.timeout_add(
990
int(self.timeout.total_seconds() * 1000), self.disable)
991
# Also start a new checker *right now*.
992
self.start_checker()
993
994
def checker_callback(self, source, condition, connection,
995
command):
425
426
def checker_callback(self, pid, condition, command):
996
427
"""The checker has completed, so take appropriate actions."""
997
428
self.checker_callback_tag = None
998
429
self.checker = None
999
# Read return code from connection (see call_pipe)
1000
returncode = connection.recv()
1001
connection.close()
1002
1003
if returncode >= 0:
1004
self.last_checker_status = returncode
1005
self.last_checker_signal = None
1006
if self.last_checker_status == 0:
430
if os.WIFEXITED(condition):
431
exitstatus = os.WEXITSTATUS(condition)
432
if exitstatus == 0:
1007
433
logger.info("Checker for %(name)s succeeded",
1008
434
vars(self))
1009
435
self.checked_ok()
1010
436
else:
1011
logger.info("Checker for %(name)s failed", vars(self))
437
logger.info("Checker for %(name)s failed",
438
vars(self))
1012
439
else:
1013
self.last_checker_status = -1
1014
self.last_checker_signal = -returncode
1015
440
logger.warning("Checker for %(name)s crashed?",
1016
441
vars(self))
1017
return False
1018
442
1019
443
def checked_ok(self):
1020
"""Assert that the client has been seen, alive and well."""
444
"""Bump up the timeout for this client.
445
446
This should only be called when the client has been seen,
447
alive and well.
448
"""
1021
449
self.last_checked_ok = datetime.datetime.utcnow()
1022
self.last_checker_status = 0
1023
self.last_checker_signal = None
1024
self.bump_timeout()
1025
1026
def bump_timeout(self, timeout=None):
1027
"""Bump up the timeout for this client."""
1028
if timeout is None:
1029
timeout = self.timeout
1030
if self.disable_initiator_tag is not None:
1031
GLib.source_remove(self.disable_initiator_tag)
1032
self.disable_initiator_tag = None
1033
if getattr(self, "enabled", False):
1034
self.disable_initiator_tag = GLib.timeout_add(
1035
int(timeout.total_seconds() * 1000), self.disable)
1036
self.expires = datetime.datetime.utcnow() + timeout
1037
450
gobject.source_remove(self.disable_initiator_tag)
451
self.disable_initiator_tag = (gobject.timeout_add
452
(self.timeout_milliseconds(),
453
self.disable))
454
1038
455
def need_approval(self):
1039
456
self.last_approval_request = datetime.datetime.utcnow()
1040
457
1041
458
def start_checker(self):
1042
459
"""Start a new checker subprocess if one is not running.
1043
460
1044
461
If a checker already exists, leave it running and do
1045
462
nothing."""
1046
463
# The reason for not killing a running checker is that if we
1047
# did that, and if a checker (for some reason) started running
1048
# slowly and taking more than 'interval' time, then the client
1049
# would inevitably timeout, since no checker would get a
1050
# chance to run to completion. If we instead leave running
464
# did that, then if a checker (for some reason) started
465
# running slowly and taking more than 'interval' time, the
466
# client would inevitably timeout, since no checker would get
467
# a chance to run to completion. If we instead leave running
1051
468
# checkers alone, the checker would have to take more time
1052
469
# than 'timeout' for the client to be disabled, which is as it
1053
470
# should be.
1054
1055
if self.checker is not None and not self.checker.is_alive():
1056
logger.warning("Checker was not alive; joining")
1057
self.checker.join()
1058
self.checker = None
471
472
# If a checker exists, make sure it is not a zombie
473
try:
474
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
475
except (AttributeError, OSError) as error:
476
if (isinstance(error, OSError)
477
and error.errno != errno.ECHILD):
478
raise error
479
else:
480
if pid:
481
logger.warning("Checker was a zombie")
482
gobject.source_remove(self.checker_callback_tag)
483
self.checker_callback(pid, status,
484
self.current_checker_command)
1059
485
# Start a new checker if needed
1060
486
if self.checker is None:
1061
# Escape attributes for the shell
1062
escaped_attrs = {
1063
attr: re.escape(str(getattr(self, attr)))
1064
for attr in self.runtime_expansions}
1065
487
try:
1066
command = self.checker_command % escaped_attrs
1067
except TypeError as error:
1068
logger.error('Could not format string "%s"',
1069
self.checker_command,
1070
exc_info=error)
1071
return True # Try again later
488
# In case checker_command has exactly one % operator
489
command = self.checker_command % self.host
490
except TypeError:
491
# Escape attributes for the shell
492
escaped_attrs = dict(
493
(attr,
494
re.escape(unicode(str(getattr(self, attr, "")),
495
errors=
496
'replace')))
497
for attr in
498
self.runtime_expansions)
499
500
try:
501
command = self.checker_command % escaped_attrs
502
except TypeError as error:
503
logger.error('Could not format string "%s":'
504
' %s', self.checker_command, error)
505
return True # Try again later
1072
506
self.current_checker_command = command
1073
logger.info("Starting checker %r for %s", command,
1074
self.name)
1075
# We don't need to redirect stdout and stderr, since
1076
# in normal mode, that is already done by daemon(),
1077
# and in debug mode we don't want to. (Stdin is
1078
# always replaced by /dev/null.)
1079
# The exception is when not debugging but nevertheless
1080
# running in the foreground; use the previously
1081
# created wnull.
1082
popen_args = {"close_fds": True,
1083
"shell": True,
1084
"cwd": "/"}
1085
if (not self.server_settings["debug"]
1086
and self.server_settings["foreground"]):
1087
popen_args.update({"stdout": wnull,
1088
"stderr": wnull})
1089
pipe = multiprocessing.Pipe(duplex=False)
1090
self.checker = multiprocessing.Process(
1091
target=call_pipe,
1092
args=(pipe[1], subprocess.call, command),
1093
kwargs=popen_args)
1094
self.checker.start()
1095
self.checker_callback_tag = GLib.io_add_watch(
1096
pipe[0].fileno(), GLib.IO_IN,
1097
self.checker_callback, pipe[0], command)
1098
# Re-run this periodically if run by GLib.timeout_add
507
try:
508
logger.info("Starting checker %r for %s",
509
command, self.name)
510
# We don't need to redirect stdout and stderr, since
511
# in normal mode, that is already done by daemon(),
512
# and in debug mode we don't want to. (Stdin is
513
# always replaced by /dev/null.)
514
self.checker = subprocess.Popen(command,
515
close_fds=True,
516
shell=True, cwd="/")
517
self.checker_callback_tag = (gobject.child_watch_add
518
(self.checker.pid,
519
self.checker_callback,
520
data=command))
521
# The checker may have completed before the gobject
522
# watch was added. Check for this.
523
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
524
if pid:
525
gobject.source_remove(self.checker_callback_tag)
526
self.checker_callback(pid, status, command)
527
except OSError as error:
528
logger.error("Failed to start subprocess: %s",
529
error)
530
# Re-run this periodically if run by gobject.timeout_add
1099
531
return True
1100
532
1101
533
def stop_checker(self):
1102
534
"""Force the checker process, if any, to stop."""
1103
535
if self.checker_callback_tag:
1104
GLib.source_remove(self.checker_callback_tag)
536
gobject.source_remove(self.checker_callback_tag)
1105
537
self.checker_callback_tag = None
1106
538
if getattr(self, "checker", None) is None:
1107
539
return
1108
540
logger.debug("Stopping checker for %(name)s", vars(self))
1109
self.checker.terminate()
541
try:
542
os.kill(self.checker.pid, signal.SIGTERM)
543
#time.sleep(0.5)
544
#if self.checker.poll() is None:
545
# os.kill(self.checker.pid, signal.SIGKILL)
546
except OSError as error:
547
if error.errno != errno.ESRCH: # No such process
548
raise
1110
549
self.checker = None
1111
550
1112
1113
def dbus_service_property(dbus_interface,
1114
signature="v",
1115
access="readwrite",
1116
byte_arrays=False):
551
def dbus_service_property(dbus_interface, signature="v",
552
access="readwrite", byte_arrays=False):
1117
553
"""Decorators for marking methods of a DBusObjectWithProperties to
1118
554
become properties on the D-Bus.
1119
555
1120
556
The decorated method will be called with no arguments by "Get"
1121
557
and with one argument by "Set".
1122
558
1123
559
The parameters, where they are supported, are the same as
1124
560
dbus.service.method, except there is only "signature", since the
1125
561
type from Get() and the type sent to Set() is the same.
1128
564
# "Set" method, so we fail early here:
1129
565
if byte_arrays and signature != "ay":
1130
566
raise ValueError("Byte arrays not supported for non-'ay'"
1131
" signature {!r}".format(signature))
1132
567
" signature %r" % signature)
1133
568
def decorator(func):
1134
569
func._dbus_is_property = True
1135
570
func._dbus_interface = dbus_interface
1138
573
func._dbus_name = func.__name__
1139
574
if func._dbus_name.endswith("_dbus_property"):
1140
575
func._dbus_name = func._dbus_name[:-14]
1141
func._dbus_get_args_options = {'byte_arrays': byte_arrays}
1142
return func
1143
1144
return decorator
1145
1146
1147
def dbus_interface_annotations(dbus_interface):
1148
"""Decorator for marking functions returning interface annotations
1149
1150
Usage:
1151
1152
@dbus_interface_annotations("org.example.Interface")
1153
def _foo(self): # Function name does not matter
1154
return {"org.freedesktop.DBus.Deprecated": "true",
1155
"org.freedesktop.DBus.Property.EmitsChangedSignal":
1156
"false"}
1157
"""
1158
1159
def decorator(func):
1160
func._dbus_is_interface = True
1161
func._dbus_interface = dbus_interface
1162
func._dbus_name = dbus_interface
1163
return func
1164
1165
return decorator
1166
1167
1168
def dbus_annotations(annotations):
1169
"""Decorator to annotate D-Bus methods, signals or properties
1170
Usage:
1171
1172
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
1173
"org.freedesktop.DBus.Property."
1174
"EmitsChangedSignal": "false"})
1175
@dbus_service_property("org.example.Interface", signature="b",
1176
access="r")
1177
def Property_dbus_property(self):
1178
return dbus.Boolean(False)
1179
1180
See also the DBusObjectWithAnnotations class.
1181
"""
1182
1183
def decorator(func):
1184
func._dbus_annotations = annotations
1185
return func
1186
576
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
577
return func
1187
578
return decorator
1188
579
1189
580
1190
581
class DBusPropertyException(dbus.exceptions.DBusException):
1191
582
"""A base class for D-Bus property-related exceptions
1192
583
"""
1193
pass
584
def __unicode__(self):
585
return unicode(str(self))
1194
586
1195
587
1196
588
class DBusPropertyAccessException(DBusPropertyException):
1205
597
pass
1206
598
1207
599
1208
class DBusObjectWithAnnotations(dbus.service.Object):
1209
"""A D-Bus object with annotations.
1210
1211
Classes inheriting from this can use the dbus_annotations
1212
decorator to add annotations to methods or signals.
1213
"""
1214
1215
@staticmethod
1216
def _is_dbus_thing(thing):
1217
"""Returns a function testing if an attribute is a D-Bus thing
1218
1219
If called like _is_dbus_thing("method") it returns a function
1220
suitable for use as predicate to inspect.getmembers().
1221
"""
1222
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
1223
False)
1224
1225
def _get_all_dbus_things(self, thing):
1226
"""Returns a generator of (name, attribute) pairs
1227
"""
1228
return ((getattr(athing.__get__(self), "_dbus_name", name),
1229
athing.__get__(self))
1230
for cls in self.__class__.__mro__
1231
for name, athing in
1232
inspect.getmembers(cls, self._is_dbus_thing(thing)))
1233
1234
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1235
out_signature="s",
1236
path_keyword='object_path',
1237
connection_keyword='connection')
1238
def Introspect(self, object_path, connection):
1239
"""Overloading of standard D-Bus method.
1240
1241
Inserts annotation tags on methods and signals.
1242
"""
1243
xmlstring = dbus.service.Object.Introspect(self, object_path,
1244
connection)
1245
try:
1246
document = xml.dom.minidom.parseString(xmlstring)
1247
1248
for if_tag in document.getElementsByTagName("interface"):
1249
# Add annotation tags
1250
for typ in ("method", "signal"):
1251
for tag in if_tag.getElementsByTagName(typ):
1252
annots = dict()
1253
for name, prop in (self.
1254
_get_all_dbus_things(typ)):
1255
if (name == tag.getAttribute("name")
1256
and prop._dbus_interface
1257
== if_tag.getAttribute("name")):
1258
annots.update(getattr(
1259
prop, "_dbus_annotations", {}))
1260
for name, value in annots.items():
1261
ann_tag = document.createElement(
1262
"annotation")
1263
ann_tag.setAttribute("name", name)
1264
ann_tag.setAttribute("value", value)
1265
tag.appendChild(ann_tag)
1266
# Add interface annotation tags
1267
for annotation, value in dict(
1268
itertools.chain.from_iterable(
1269
annotations().items()
1270
for name, annotations
1271
in self._get_all_dbus_things("interface")
1272
if name == if_tag.getAttribute("name")
1273
)).items():
1274
ann_tag = document.createElement("annotation")
1275
ann_tag.setAttribute("name", annotation)
1276
ann_tag.setAttribute("value", value)
1277
if_tag.appendChild(ann_tag)
1278
# Fix argument name for the Introspect method itself
1279
if (if_tag.getAttribute("name")
1280
== dbus.INTROSPECTABLE_IFACE):
1281
for cn in if_tag.getElementsByTagName("method"):
1282
if cn.getAttribute("name") == "Introspect":
1283
for arg in cn.getElementsByTagName("arg"):
1284
if (arg.getAttribute("direction")
1285
== "out"):
1286
arg.setAttribute("name",
1287
"xml_data")
1288
xmlstring = document.toxml("utf-8")
1289
document.unlink()
1290
except (AttributeError, xml.dom.DOMException,
1291
xml.parsers.expat.ExpatError) as error:
1292
logger.error("Failed to override Introspection method",
1293
exc_info=error)
1294
return xmlstring
1295
1296
1297
class DBusObjectWithProperties(DBusObjectWithAnnotations):
600
class DBusObjectWithProperties(dbus.service.Object):
1298
601
"""A D-Bus object with properties.
1299
602
1300
603
Classes inheriting from this can use the dbus_service_property
1301
604
decorator to expose methods as D-Bus properties. It exposes the
1302
605
standard Get(), Set(), and GetAll() methods on the D-Bus.
1303
606
"""
1304
607
608
@staticmethod
609
def _is_dbus_property(obj):
610
return getattr(obj, "_dbus_is_property", False)
611
612
def _get_all_dbus_properties(self):
613
"""Returns a generator of (name, attribute) pairs
614
"""
615
return ((prop._dbus_name, prop)
616
for name, prop in
617
inspect.getmembers(self, self._is_dbus_property))
618
1305
619
def _get_dbus_property(self, interface_name, property_name):
1306
620
"""Returns a bound method if one exists which is a D-Bus
1307
621
property with the specified name and interface.
1308
622
"""
1309
for cls in self.__class__.__mro__:
1310
for name, value in inspect.getmembers(
1311
cls, self._is_dbus_thing("property")):
1312
if (value._dbus_name == property_name
1313
and value._dbus_interface == interface_name):
1314
return value.__get__(self)
1315
623
for name in (property_name,
624
property_name + "_dbus_property"):
625
prop = getattr(self, name, None)
626
if (prop is None
627
or not self._is_dbus_property(prop)
628
or prop._dbus_name != property_name
629
or (interface_name and prop._dbus_interface
630
and interface_name != prop._dbus_interface)):
631
continue
632
return prop
1316
633
# No such property
1317
raise DBusPropertyNotFound("{}:{}.{}".format(
1318
self.dbus_object_path, interface_name, property_name))
1319
1320
@classmethod
1321
def _get_all_interface_names(cls):
1322
"""Get a sequence of all interfaces supported by an object"""
1323
return (name for name in set(getattr(getattr(x, attr),
1324
"_dbus_interface", None)
1325
for x in (inspect.getmro(cls))
1326
for attr in dir(x))
1327
if name is not None)
1328
1329
@dbus.service.method(dbus.PROPERTIES_IFACE,
1330
in_signature="ss",
634
raise DBusPropertyNotFound(self.dbus_object_path + ":"
635
+ interface_name + "."
636
+ property_name)
637
638
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
1331
639
out_signature="v")
1332
640
def Get(self, interface_name, property_name):
1333
641
"""Standard D-Bus property Get() method, see D-Bus standard.
1339
647
if not hasattr(value, "variant_level"):
1340
648
return value
1341
649
return type(value)(value, variant_level=value.variant_level+1)
1342
650
1343
651
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
1344
652
def Set(self, interface_name, property_name, value):
1345
653
"""Standard D-Bus property Set() method, see D-Bus standard.
1351
659
# The byte_arrays option is not supported yet on
1352
660
# signatures other than "ay".
1353
661
if prop._dbus_signature != "ay":
1354
raise ValueError("Byte arrays not supported for non-"
1355
"'ay' signature {!r}"
1356
.format(prop._dbus_signature))
1357
value = dbus.ByteArray(b''.join(chr(byte)
1358
for byte in value))
662
raise ValueError
663
value = dbus.ByteArray(''.join(unichr(byte)
664
for byte in value))
1359
665
prop(value)
1360
1361
@dbus.service.method(dbus.PROPERTIES_IFACE,
1362
in_signature="s",
666
667
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
1363
668
out_signature="a{sv}")
1364
669
def GetAll(self, interface_name):
1365
670
"""Standard D-Bus property GetAll() method, see D-Bus
1367
672
1368
673
Note: Will not include properties with access="write".
1369
674
"""
1370
properties = {}
1371
for name, prop in self._get_all_dbus_things("property"):
675
all = {}
676
for name, prop in self._get_all_dbus_properties():
1372
677
if (interface_name
1373
678
and interface_name != prop._dbus_interface):
1374
679
# Interface non-empty but did not match
1378
683
continue
1379
684
value = prop()
1380
685
if not hasattr(value, "variant_level"):
1381
properties[name] = value
686
all[name] = value
1382
687
continue
1383
properties[name] = type(value)(
1384
value, variant_level=value.variant_level + 1)
1385
return dbus.Dictionary(properties, signature="sv")
1386
1387
@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
1388
def PropertiesChanged(self, interface_name, changed_properties,
1389
invalidated_properties):
1390
"""Standard D-Bus PropertiesChanged() signal, see D-Bus
1391
standard.
1392
"""
1393
pass
1394
688
all[name] = type(value)(value, variant_level=
689
value.variant_level+1)
690
return dbus.Dictionary(all, signature="sv")
691
1395
692
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1396
693
out_signature="s",
1397
694
path_keyword='object_path',
1398
695
connection_keyword='connection')
1399
696
def Introspect(self, object_path, connection):
1400
"""Overloading of standard D-Bus method.
1401
1402
Inserts property tags and interface annotation tags.
697
"""Standard D-Bus method, overloaded to insert property tags.
1403
698
"""
1404
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1405
object_path,
1406
connection)
699
xmlstring = dbus.service.Object.Introspect(self, object_path,
700
connection)
1407
701
try:
1408
702
document = xml.dom.minidom.parseString(xmlstring)
1409
1410
703
def make_tag(document, name, prop):
1411
704
e = document.createElement("property")
1412
705
e.setAttribute("name", name)
1413
706
e.setAttribute("type", prop._dbus_signature)
1414
707
e.setAttribute("access", prop._dbus_access)
1415
708
return e
1416
1417
709
for if_tag in document.getElementsByTagName("interface"):
1418
# Add property tags
1419
710
for tag in (make_tag(document, name, prop)
1420
711
for name, prop
1421
in self._get_all_dbus_things("property")
712
in self._get_all_dbus_properties()
1422
713
if prop._dbus_interface
1423
714
== if_tag.getAttribute("name")):
1424
715
if_tag.appendChild(tag)
1425
# Add annotation tags for properties
1426
for tag in if_tag.getElementsByTagName("property"):
1427
annots = dict()
1428
for name, prop in self._get_all_dbus_things(
1429
"property"):
1430
if (name == tag.getAttribute("name")
1431
and prop._dbus_interface
1432
== if_tag.getAttribute("name")):
1433
annots.update(getattr(
1434
prop, "_dbus_annotations", {}))
1435
for name, value in annots.items():
1436
ann_tag = document.createElement(
1437
"annotation")
1438
ann_tag.setAttribute("name", name)
1439
ann_tag.setAttribute("value", value)
1440
tag.appendChild(ann_tag)
1441
716
# Add the names to the return values for the
1442
717
# "org.freedesktop.DBus.Properties" methods
1443
718
if (if_tag.getAttribute("name")
1458
733
except (AttributeError, xml.dom.DOMException,
1459
734
xml.parsers.expat.ExpatError) as error:
1460
735
logger.error("Failed to override Introspection method",
1461
exc_info=error)
1462
return xmlstring
1463
1464
1465
try:
1466
dbus.OBJECT_MANAGER_IFACE
1467
except AttributeError:
1468
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1469
1470
1471
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1472
"""A D-Bus object with an ObjectManager.
1473
1474
Classes inheriting from this exposes the standard
1475
GetManagedObjects call and the InterfacesAdded and
1476
InterfacesRemoved signals on the standard
1477
"org.freedesktop.DBus.ObjectManager" interface.
1478
1479
Note: No signals are sent automatically; they must be sent
1480
manually.
1481
"""
1482
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1483
out_signature="a{oa{sa{sv}}}")
1484
def GetManagedObjects(self):
1485
"""This function must be overridden"""
1486
raise NotImplementedError()
1487
1488
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1489
signature="oa{sa{sv}}")
1490
def InterfacesAdded(self, object_path, interfaces_and_properties):
1491
pass
1492
1493
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1494
def InterfacesRemoved(self, object_path, interfaces):
1495
pass
1496
1497
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1498
out_signature="s",
1499
path_keyword='object_path',
1500
connection_keyword='connection')
1501
def Introspect(self, object_path, connection):
1502
"""Overloading of standard D-Bus method.
1503
1504
Override return argument name of GetManagedObjects to be
1505
"objpath_interfaces_and_properties"
1506
"""
1507
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1508
object_path,
1509
connection)
1510
try:
1511
document = xml.dom.minidom.parseString(xmlstring)
1512
1513
for if_tag in document.getElementsByTagName("interface"):
1514
# Fix argument name for the GetManagedObjects method
1515
if (if_tag.getAttribute("name")
1516
== dbus.OBJECT_MANAGER_IFACE):
1517
for cn in if_tag.getElementsByTagName("method"):
1518
if (cn.getAttribute("name")
1519
== "GetManagedObjects"):
1520
for arg in cn.getElementsByTagName("arg"):
1521
if (arg.getAttribute("direction")
1522
== "out"):
1523
arg.setAttribute(
1524
"name",
1525
"objpath_interfaces"
1526
"_and_properties")
1527
xmlstring = document.toxml("utf-8")
1528
document.unlink()
1529
except (AttributeError, xml.dom.DOMException,
1530
xml.parsers.expat.ExpatError) as error:
1531
logger.error("Failed to override Introspection method",
1532
exc_info=error)
1533
return xmlstring
1534
1535
1536
def datetime_to_dbus(dt, variant_level=0):
1537
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1538
if dt is None:
1539
return dbus.String("", variant_level=variant_level)
1540
return dbus.String(dt.isoformat(), variant_level=variant_level)
1541
1542
1543
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1544
"""A class decorator; applied to a subclass of
1545
dbus.service.Object, it will add alternate D-Bus attributes with
1546
interface names according to the "alt_interface_names" mapping.
1547
Usage:
1548
1549
@alternate_dbus_interfaces({"org.example.Interface":
1550
"net.example.AlternateInterface"})
1551
class SampleDBusObject(dbus.service.Object):
1552
@dbus.service.method("org.example.Interface")
1553
def SampleDBusMethod():
1554
pass
1555
1556
The above "SampleDBusMethod" on "SampleDBusObject" will be
1557
reachable via two interfaces: "org.example.Interface" and
1558
"net.example.AlternateInterface", the latter of which will have
1559
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1560
"true", unless "deprecate" is passed with a False value.
1561
1562
This works for methods and signals, and also for D-Bus properties
1563
(from DBusObjectWithProperties) and interfaces (from the
1564
dbus_interface_annotations decorator).
1565
"""
1566
1567
def wrapper(cls):
1568
for orig_interface_name, alt_interface_name in (
1569
alt_interface_names.items()):
1570
attr = {}
1571
interface_names = set()
1572
# Go though all attributes of the class
1573
for attrname, attribute in inspect.getmembers(cls):
1574
# Ignore non-D-Bus attributes, and D-Bus attributes
1575
# with the wrong interface name
1576
if (not hasattr(attribute, "_dbus_interface")
1577
or not attribute._dbus_interface.startswith(
1578
orig_interface_name)):
1579
continue
1580
# Create an alternate D-Bus interface name based on
1581
# the current name
1582
alt_interface = attribute._dbus_interface.replace(
1583
orig_interface_name, alt_interface_name)
1584
interface_names.add(alt_interface)
1585
# Is this a D-Bus signal?
1586
if getattr(attribute, "_dbus_is_signal", False):
1587
# Extract the original non-method undecorated
1588
# function by black magic
1589
if sys.version_info.major == 2:
1590
nonmethod_func = (dict(
1591
zip(attribute.func_code.co_freevars,
1592
attribute.__closure__))
1593
["func"].cell_contents)
1594
else:
1595
nonmethod_func = (dict(
1596
zip(attribute.__code__.co_freevars,
1597
attribute.__closure__))
1598
["func"].cell_contents)
1599
# Create a new, but exactly alike, function
1600
# object, and decorate it to be a new D-Bus signal
1601
# with the alternate D-Bus interface name
1602
new_function = copy_function(nonmethod_func)
1603
new_function = (dbus.service.signal(
1604
alt_interface,
1605
attribute._dbus_signature)(new_function))
1606
# Copy annotations, if any
1607
try:
1608
new_function._dbus_annotations = dict(
1609
attribute._dbus_annotations)
1610
except AttributeError:
1611
pass
1612
1613
# Define a creator of a function to call both the
1614
# original and alternate functions, so both the
1615
# original and alternate signals gets sent when
1616
# the function is called
1617
def fixscope(func1, func2):
1618
"""This function is a scope container to pass
1619
func1 and func2 to the "call_both" function
1620
outside of its arguments"""
1621
1622
@functools.wraps(func2)
1623
def call_both(*args, **kwargs):
1624
"""This function will emit two D-Bus
1625
signals by calling func1 and func2"""
1626
func1(*args, **kwargs)
1627
func2(*args, **kwargs)
1628
# Make wrapper function look like a D-Bus
1629
# signal
1630
for name, attr in inspect.getmembers(func2):
1631
if name.startswith("_dbus_"):
1632
setattr(call_both, name, attr)
1633
1634
return call_both
1635
# Create the "call_both" function and add it to
1636
# the class
1637
attr[attrname] = fixscope(attribute, new_function)
1638
# Is this a D-Bus method?
1639
elif getattr(attribute, "_dbus_is_method", False):
1640
# Create a new, but exactly alike, function
1641
# object. Decorate it to be a new D-Bus method
1642
# with the alternate D-Bus interface name. Add it
1643
# to the class.
1644
attr[attrname] = (
1645
dbus.service.method(
1646
alt_interface,
1647
attribute._dbus_in_signature,
1648
attribute._dbus_out_signature)
1649
(copy_function(attribute)))
1650
# Copy annotations, if any
1651
try:
1652
attr[attrname]._dbus_annotations = dict(
1653
attribute._dbus_annotations)
1654
except AttributeError:
1655
pass
1656
# Is this a D-Bus property?
1657
elif getattr(attribute, "_dbus_is_property", False):
1658
# Create a new, but exactly alike, function
1659
# object, and decorate it to be a new D-Bus
1660
# property with the alternate D-Bus interface
1661
# name. Add it to the class.
1662
attr[attrname] = (dbus_service_property(
1663
alt_interface, attribute._dbus_signature,
1664
attribute._dbus_access,
1665
attribute._dbus_get_args_options
1666
["byte_arrays"])
1667
(copy_function(attribute)))
1668
# Copy annotations, if any
1669
try:
1670
attr[attrname]._dbus_annotations = dict(
1671
attribute._dbus_annotations)
1672
except AttributeError:
1673
pass
1674
# Is this a D-Bus interface?
1675
elif getattr(attribute, "_dbus_is_interface", False):
1676
# Create a new, but exactly alike, function
1677
# object. Decorate it to be a new D-Bus interface
1678
# with the alternate D-Bus interface name. Add it
1679
# to the class.
1680
attr[attrname] = (
1681
dbus_interface_annotations(alt_interface)
1682
(copy_function(attribute)))
1683
if deprecate:
1684
# Deprecate all alternate interfaces
1685
iname = "_AlternateDBusNames_interface_annotation{}"
1686
for interface_name in interface_names:
1687
1688
@dbus_interface_annotations(interface_name)
1689
def func(self):
1690
return {"org.freedesktop.DBus.Deprecated":
1691
"true"}
1692
# Find an unused name
1693
for aname in (iname.format(i)
1694
for i in itertools.count()):
1695
if aname not in attr:
1696
attr[aname] = func
1697
break
1698
if interface_names:
1699
# Replace the class with a new subclass of it with
1700
# methods, signals, etc. as created above.
1701
if sys.version_info.major == 2:
1702
cls = type(b"{}Alternate".format(cls.__name__),
1703
(cls, ), attr)
1704
else:
1705
cls = type("{}Alternate".format(cls.__name__),
1706
(cls, ), attr)
1707
return cls
1708
1709
return wrapper
1710
1711
1712
@alternate_dbus_interfaces({"se.recompile.Mandos":
1713
"se.bsnet.fukt.Mandos"})
736
error)
737
return xmlstring
738
739
1714
740
class ClientDBus(Client, DBusObjectWithProperties):
1715
741
"""A Client class using D-Bus
1716
742
1717
743
Attributes:
1718
744
dbus_object_path: dbus.ObjectPath
1719
745
bus: dbus.SystemBus()
1720
746
"""
1721
747
1722
748
runtime_expansions = (Client.runtime_expansions
1723
+ ("dbus_object_path", ))
1724
1725
_interface = "se.recompile.Mandos.Client"
1726
749
+ ("dbus_object_path",))
750
1727
751
# dbus.service.Object doesn't use super(), so we can't either.
1728
1729
def __init__(self, bus=None, *args, **kwargs):
752
753
def __init__(self, bus = None, *args, **kwargs):
754
self._approvals_pending = 0
1730
755
self.bus = bus
1731
756
Client.__init__(self, *args, **kwargs)
1732
757
# Only now, when this client is initialized, can it show up on
1733
758
# the D-Bus
1734
client_object_name = str(self.name).translate(
759
client_object_name = unicode(self.name).translate(
1735
760
{ord("."): ord("_"),
1736
761
ord("-"): ord("_")})
1737
self.dbus_object_path = dbus.ObjectPath(
1738
"/clients/" + client_object_name)
762
self.dbus_object_path = (dbus.ObjectPath
763
("/clients/" + client_object_name))
1739
764
DBusObjectWithProperties.__init__(self, self.bus,
1740
765
self.dbus_object_path)
1741
1742
def notifychangeproperty(transform_func, dbus_name,
1743
type_func=lambda x: x,
1744
variant_level=1,
1745
invalidate_only=False,
1746
_interface=_interface):
1747
""" Modify a variable so that it's a property which announces
1748
its changes to DBus.
1749
1750
transform_fun: Function that takes a value and a variant_level
1751
and transforms it to a D-Bus type.
1752
dbus_name: D-Bus name of the variable
1753
type_func: Function that transform the value before sending it
1754
to the D-Bus. Default: no transform
1755
variant_level: D-Bus variant level. Default: 1
1756
"""
1757
attrname = "_{}".format(dbus_name)
1758
1759
def setter(self, value):
1760
if hasattr(self, "dbus_object_path"):
1761
if (not hasattr(self, attrname) or
1762
type_func(getattr(self, attrname, None))
1763
!= type_func(value)):
1764
if invalidate_only:
1765
self.PropertiesChanged(
1766
_interface, dbus.Dictionary(),
1767
dbus.Array((dbus_name, )))
1768
else:
1769
dbus_value = transform_func(
1770
type_func(value),
1771
variant_level=variant_level)
1772
self.PropertyChanged(dbus.String(dbus_name),
1773
dbus_value)
1774
self.PropertiesChanged(
1775
_interface,
1776
dbus.Dictionary({dbus.String(dbus_name):
1777
dbus_value}),
1778
dbus.Array())
1779
setattr(self, attrname, value)
1780
1781
return property(lambda self: getattr(self, attrname), setter)
1782
1783
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1784
approvals_pending = notifychangeproperty(dbus.Boolean,
1785
"ApprovalPending",
1786
type_func=bool)
1787
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1788
last_enabled = notifychangeproperty(datetime_to_dbus,
1789
"LastEnabled")
1790
checker = notifychangeproperty(
1791
dbus.Boolean, "CheckerRunning",
1792
type_func=lambda checker: checker is not None)
1793
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1794
"LastCheckedOK")
1795
last_checker_status = notifychangeproperty(dbus.Int16,
1796
"LastCheckerStatus")
1797
last_approval_request = notifychangeproperty(
1798
datetime_to_dbus, "LastApprovalRequest")
1799
approved_by_default = notifychangeproperty(dbus.Boolean,
1800
"ApprovedByDefault")
1801
approval_delay = notifychangeproperty(
1802
dbus.UInt64, "ApprovalDelay",
1803
type_func=lambda td: td.total_seconds() * 1000)
1804
approval_duration = notifychangeproperty(
1805
dbus.UInt64, "ApprovalDuration",
1806
type_func=lambda td: td.total_seconds() * 1000)
1807
host = notifychangeproperty(dbus.String, "Host")
1808
timeout = notifychangeproperty(
1809
dbus.UInt64, "Timeout",
1810
type_func=lambda td: td.total_seconds() * 1000)
1811
extended_timeout = notifychangeproperty(
1812
dbus.UInt64, "ExtendedTimeout",
1813
type_func=lambda td: td.total_seconds() * 1000)
1814
interval = notifychangeproperty(
1815
dbus.UInt64, "Interval",
1816
type_func=lambda td: td.total_seconds() * 1000)
1817
checker_command = notifychangeproperty(dbus.String, "Checker")
1818
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1819
invalidate_only=True)
1820
1821
del notifychangeproperty
1822
766
767
def _get_approvals_pending(self):
768
return self._approvals_pending
769
def _set_approvals_pending(self, value):
770
old_value = self._approvals_pending
771
self._approvals_pending = value
772
bval = bool(value)
773
if (hasattr(self, "dbus_object_path")
774
and bval is not bool(old_value)):
775
dbus_bool = dbus.Boolean(bval, variant_level=1)
776
self.PropertyChanged(dbus.String("ApprovalPending"),
777
dbus_bool)
778
779
approvals_pending = property(_get_approvals_pending,
780
_set_approvals_pending)
781
del _get_approvals_pending, _set_approvals_pending
782
783
@staticmethod
784
def _datetime_to_dbus(dt, variant_level=0):
785
"""Convert a UTC datetime.datetime() to a D-Bus type."""
786
return dbus.String(dt.isoformat(),
787
variant_level=variant_level)
788
789
def enable(self):
790
oldstate = getattr(self, "enabled", False)
791
r = Client.enable(self)
792
if oldstate != self.enabled:
793
# Emit D-Bus signals
794
self.PropertyChanged(dbus.String("Enabled"),
795
dbus.Boolean(True, variant_level=1))
796
self.PropertyChanged(
797
dbus.String("LastEnabled"),
798
self._datetime_to_dbus(self.last_enabled,
799
variant_level=1))
800
return r
801
802
def disable(self, quiet = False):
803
oldstate = getattr(self, "enabled", False)
804
r = Client.disable(self, quiet=quiet)
805
if not quiet and oldstate != self.enabled:
806
# Emit D-Bus signal
807
self.PropertyChanged(dbus.String("Enabled"),
808
dbus.Boolean(False, variant_level=1))
809
return r
810
1823
811
def __del__(self, *args, **kwargs):
1824
812
try:
1825
813
self.remove_from_connection()
1828
816
if hasattr(DBusObjectWithProperties, "__del__"):
1829
817
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1830
818
Client.__del__(self, *args, **kwargs)
1831
1832
def checker_callback(self, source, condition,
1833
connection, command, *args, **kwargs):
1834
ret = Client.checker_callback(self, source, condition,
1835
connection, command, *args,
1836
**kwargs)
1837
exitstatus = self.last_checker_status
1838
if exitstatus >= 0:
819
820
def checker_callback(self, pid, condition, command,
821
*args, **kwargs):
822
self.checker_callback_tag = None
823
self.checker = None
824
# Emit D-Bus signal
825
self.PropertyChanged(dbus.String("CheckerRunning"),
826
dbus.Boolean(False, variant_level=1))
827
if os.WIFEXITED(condition):
828
exitstatus = os.WEXITSTATUS(condition)
1839
829
# Emit D-Bus signal
1840
830
self.CheckerCompleted(dbus.Int16(exitstatus),
1841
# This is specific to GNU libC
1842
dbus.Int64(exitstatus << 8),
831
dbus.Int64(condition),
1843
832
dbus.String(command))
1844
833
else:
1845
834
# Emit D-Bus signal
1846
835
self.CheckerCompleted(dbus.Int16(-1),
1847
dbus.Int64(
1848
# This is specific to GNU libC
1849
(exitstatus << 8)
1850
| self.last_checker_signal),
836
dbus.Int64(condition),
1851
837
dbus.String(command))
1852
return ret
1853
838
839
return Client.checker_callback(self, pid, condition, command,
840
*args, **kwargs)
841
842
def checked_ok(self, *args, **kwargs):
843
Client.checked_ok(self, *args, **kwargs)
844
# Emit D-Bus signal
845
self.PropertyChanged(
846
dbus.String("LastCheckedOK"),
847
(self._datetime_to_dbus(self.last_checked_ok,
848
variant_level=1)))
849
850
def need_approval(self, *args, **kwargs):
851
r = Client.need_approval(self, *args, **kwargs)
852
# Emit D-Bus signal
853
self.PropertyChanged(
854
dbus.String("LastApprovalRequest"),
855
(self._datetime_to_dbus(self.last_approval_request,
856
variant_level=1)))
857
return r
858
1854
859
def start_checker(self, *args, **kwargs):
1855
old_checker_pid = getattr(self.checker, "pid", None)
860
old_checker = self.checker
861
if self.checker is not None:
862
old_checker_pid = self.checker.pid
863
else:
864
old_checker_pid = None
1856
865
r = Client.start_checker(self, *args, **kwargs)
1857
866
# Only if new checker process was started
1858
867
if (self.checker is not None
1859
868
and old_checker_pid != self.checker.pid):
1860
869
# Emit D-Bus signal
1861
870
self.CheckerStarted(self.current_checker_command)
871
self.PropertyChanged(
872
dbus.String("CheckerRunning"),
873
dbus.Boolean(True, variant_level=1))
874
return r
875
876
def stop_checker(self, *args, **kwargs):
877
old_checker = getattr(self, "checker", None)
878
r = Client.stop_checker(self, *args, **kwargs)
879
if (old_checker is not None
880
and getattr(self, "checker", None) is None):
881
self.PropertyChanged(dbus.String("CheckerRunning"),
882
dbus.Boolean(False, variant_level=1))
1862
883
return r
1863
884
1864
885
def _reset_approved(self):
1865
self.approved = None
886
self._approved = None
1866
887
return False
1867
888
1868
889
def approve(self, value=True):
1869
self.approved = value
1870
GLib.timeout_add(int(self.approval_duration.total_seconds()
1871
* 1000), self._reset_approved)
1872
890
self.send_changedstate()
1873
1874
# D-Bus methods, signals & properties
1875
1876
# Interfaces
1877
1878
# Signals
1879
891
self._approved = value
892
gobject.timeout_add(self._timedelta_to_milliseconds
893
(self.approval_duration),
894
self._reset_approved)
895
896
897
## D-Bus methods, signals & properties
898
_interface = "se.bsnet.fukt.Mandos.Client"
899
900
## Signals
901
1880
902
# CheckerCompleted - signal
1881
903
@dbus.service.signal(_interface, signature="nxs")
1882
904
def CheckerCompleted(self, exitcode, waitstatus, command):
1883
905
"D-Bus signal"
1884
906
pass
1885
907
1886
908
# CheckerStarted - signal
1887
909
@dbus.service.signal(_interface, signature="s")
1888
910
def CheckerStarted(self, command):
1889
911
"D-Bus signal"
1890
912
pass
1891
913
1892
914
# PropertyChanged - signal
1893
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1894
915
@dbus.service.signal(_interface, signature="sv")
1895
916
def PropertyChanged(self, property, value):
1896
917
"D-Bus signal"
1897
918
pass
1898
919
1899
920
# GotSecret - signal
1900
921
@dbus.service.signal(_interface)
1901
922
def GotSecret(self):
1904
925
server to mandos-client
1905
926
"""
1906
927
pass
1907
928
1908
929
# Rejected - signal
1909
930
@dbus.service.signal(_interface, signature="s")
1910
931
def Rejected(self, reason):
1911
932
"D-Bus signal"
1912
933
pass
1913
934
1914
935
# NeedApproval - signal
1915
936
@dbus.service.signal(_interface, signature="tb")
1916
937
def NeedApproval(self, timeout, default):
1917
938
"D-Bus signal"
1918
939
return self.need_approval()
1919
1920
# Methods
1921
940
941
## Methods
942
1922
943
# Approve - method
1923
944
@dbus.service.method(_interface, in_signature="b")
1924
945
def Approve(self, value):
1925
946
self.approve(value)
1926
947
1927
948
# CheckedOK - method
1928
949
@dbus.service.method(_interface)
1929
950
def CheckedOK(self):
1930
951
self.checked_ok()
1931
952
1932
953
# Enable - method
1933
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1934
954
@dbus.service.method(_interface)
1935
955
def Enable(self):
1936
956
"D-Bus method"
1937
957
self.enable()
1938
958
1939
959
# StartChecker - method
1940
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1941
960
@dbus.service.method(_interface)
1942
961
def StartChecker(self):
1943
962
"D-Bus method"
1944
963
self.start_checker()
1945
964
1946
965
# Disable - method
1947
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1948
966
@dbus.service.method(_interface)
1949
967
def Disable(self):
1950
968
"D-Bus method"
1951
969
self.disable()
1952
970
1953
971
# StopChecker - method
1954
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1955
972
@dbus.service.method(_interface)
1956
973
def StopChecker(self):
1957
974
self.stop_checker()
1958
1959
# Properties
1960
975
976
## Properties
977
1961
978
# ApprovalPending - property
1962
979
@dbus_service_property(_interface, signature="b", access="read")
1963
980
def ApprovalPending_dbus_property(self):
1964
981
return dbus.Boolean(bool(self.approvals_pending))
1965
982
1966
983
# ApprovedByDefault - property
1967
@dbus_service_property(_interface,
1968
signature="b",
984
@dbus_service_property(_interface, signature="b",
1969
985
access="readwrite")
1970
986
def ApprovedByDefault_dbus_property(self, value=None):
1971
987
if value is None: # get
1972
988
return dbus.Boolean(self.approved_by_default)
1973
989
self.approved_by_default = bool(value)
1974
990
# Emit D-Bus signal
991
self.PropertyChanged(dbus.String("ApprovedByDefault"),
992
dbus.Boolean(value, variant_level=1))
993
1975
994
# ApprovalDelay - property
1976
@dbus_service_property(_interface,
1977
signature="t",
995
@dbus_service_property(_interface, signature="t",
1978
996
access="readwrite")
1979
997
def ApprovalDelay_dbus_property(self, value=None):
1980
998
if value is None: # get
1981
return dbus.UInt64(self.approval_delay.total_seconds()
1982
* 1000)
999
return dbus.UInt64(self.approval_delay_milliseconds())
1983
1000
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1984
1001
# Emit D-Bus signal
1002
self.PropertyChanged(dbus.String("ApprovalDelay"),
1003
dbus.UInt64(value, variant_level=1))
1004
1985
1005
# ApprovalDuration - property
1986
@dbus_service_property(_interface,
1987
signature="t",
1006
@dbus_service_property(_interface, signature="t",
1988
1007
access="readwrite")
1989
1008
def ApprovalDuration_dbus_property(self, value=None):
1990
1009
if value is None: # get
1991
return dbus.UInt64(self.approval_duration.total_seconds()
1992
* 1000)
1010
return dbus.UInt64(self._timedelta_to_milliseconds(
1011
self.approval_duration))
1993
1012
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1994
1013
# Emit D-Bus signal
1014
self.PropertyChanged(dbus.String("ApprovalDuration"),
1015
dbus.UInt64(value, variant_level=1))
1016
1995
1017
# Name - property
1996
@dbus_annotations(
1997
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1998
1018
@dbus_service_property(_interface, signature="s", access="read")
1999
1019
def Name_dbus_property(self):
2000
1020
return dbus.String(self.name)
2001
1021
2002
1022
# Fingerprint - property
2003
@dbus_annotations(
2004
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2005
1023
@dbus_service_property(_interface, signature="s", access="read")
2006
1024
def Fingerprint_dbus_property(self):
2007
1025
return dbus.String(self.fingerprint)
2008
1026
2009
1027
# Host - property
2010
@dbus_service_property(_interface,
2011
signature="s",
1028
@dbus_service_property(_interface, signature="s",
2012
1029
access="readwrite")
2013
1030
def Host_dbus_property(self, value=None):
2014
1031
if value is None: # get
2015
1032
return dbus.String(self.host)
2016
self.host = str(value)
2017
1033
self.host = value
1034
# Emit D-Bus signal
1035
self.PropertyChanged(dbus.String("Host"),
1036
dbus.String(value, variant_level=1))
1037
2018
1038
# Created - property
2019
@dbus_annotations(
2020
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2021
1039
@dbus_service_property(_interface, signature="s", access="read")
2022
1040
def Created_dbus_property(self):
2023
return datetime_to_dbus(self.created)
2024
1041
return dbus.String(self._datetime_to_dbus(self.created))
1042
2025
1043
# LastEnabled - property
2026
1044
@dbus_service_property(_interface, signature="s", access="read")
2027
1045
def LastEnabled_dbus_property(self):
2028
return datetime_to_dbus(self.last_enabled)
2029
1046
if self.last_enabled is None:
1047
return dbus.String("")
1048
return dbus.String(self._datetime_to_dbus(self.last_enabled))
1049
2030
1050
# Enabled - property
2031
@dbus_service_property(_interface,
2032
signature="b",
1051
@dbus_service_property(_interface, signature="b",
2033
1052
access="readwrite")
2034
1053
def Enabled_dbus_property(self, value=None):
2035
1054
if value is None: # get
2038
1057
self.enable()
2039
1058
else:
2040
1059
self.disable()
2041
1060
2042
1061
# LastCheckedOK - property
2043
@dbus_service_property(_interface,
2044
signature="s",
1062
@dbus_service_property(_interface, signature="s",
2045
1063
access="readwrite")
2046
1064
def LastCheckedOK_dbus_property(self, value=None):
2047
1065
if value is not None:
2048
1066
self.checked_ok()
2049
1067
return
2050
return datetime_to_dbus(self.last_checked_ok)
2051
2052
# LastCheckerStatus - property
2053
@dbus_service_property(_interface, signature="n", access="read")
2054
def LastCheckerStatus_dbus_property(self):
2055
return dbus.Int16(self.last_checker_status)
2056
2057
# Expires - property
2058
@dbus_service_property(_interface, signature="s", access="read")
2059
def Expires_dbus_property(self):
2060
return datetime_to_dbus(self.expires)
2061
1068
if self.last_checked_ok is None:
1069
return dbus.String("")
1070
return dbus.String(self._datetime_to_dbus(self
1071
.last_checked_ok))
1072
2062
1073
# LastApprovalRequest - property
2063
1074
@dbus_service_property(_interface, signature="s", access="read")
2064
1075
def LastApprovalRequest_dbus_property(self):
2065
return datetime_to_dbus(self.last_approval_request)
2066
1076
if self.last_approval_request is None:
1077
return dbus.String("")
1078
return dbus.String(self.
1079
_datetime_to_dbus(self
1080
.last_approval_request))
1081
2067
1082
# Timeout - property
2068
@dbus_service_property(_interface,
2069
signature="t",
1083
@dbus_service_property(_interface, signature="t",
2070
1084
access="readwrite")
2071
1085
def Timeout_dbus_property(self, value=None):
2072
1086
if value is None: # get
2073
return dbus.UInt64(self.timeout.total_seconds() * 1000)
2074
old_timeout = self.timeout
1087
return dbus.UInt64(self.timeout_milliseconds())
2075
1088
self.timeout = datetime.timedelta(0, 0, 0, value)
2076
# Reschedule disabling
2077
if self.enabled:
2078
now = datetime.datetime.utcnow()
2079
self.expires += self.timeout - old_timeout
2080
if self.expires <= now:
2081
# The timeout has passed
2082
self.disable()
2083
else:
2084
if (getattr(self, "disable_initiator_tag", None)
2085
is None):
2086
return
2087
GLib.source_remove(self.disable_initiator_tag)
2088
self.disable_initiator_tag = GLib.timeout_add(
2089
int((self.expires - now).total_seconds() * 1000),
2090
self.disable)
2091
2092
# ExtendedTimeout - property
2093
@dbus_service_property(_interface,
2094
signature="t",
2095
access="readwrite")
2096
def ExtendedTimeout_dbus_property(self, value=None):
2097
if value is None: # get
2098
return dbus.UInt64(self.extended_timeout.total_seconds()
2099
* 1000)
2100
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
2101
1089
# Emit D-Bus signal
1090
self.PropertyChanged(dbus.String("Timeout"),
1091
dbus.UInt64(value, variant_level=1))
1092
if getattr(self, "disable_initiator_tag", None) is None:
1093
return
1094
# Reschedule timeout
1095
gobject.source_remove(self.disable_initiator_tag)
1096
self.disable_initiator_tag = None
1097
time_to_die = (self.
1098
_timedelta_to_milliseconds((self
1099
.last_checked_ok
1100
+ self.timeout)
1101
- datetime.datetime
1102
.utcnow()))
1103
if time_to_die <= 0:
1104
# The timeout has passed
1105
self.disable()
1106
else:
1107
self.disable_initiator_tag = (gobject.timeout_add
1108
(time_to_die, self.disable))
1109
2102
1110
# Interval - property
2103
@dbus_service_property(_interface,
2104
signature="t",
1111
@dbus_service_property(_interface, signature="t",
2105
1112
access="readwrite")
2106
1113
def Interval_dbus_property(self, value=None):
2107
1114
if value is None: # get
2108
return dbus.UInt64(self.interval.total_seconds() * 1000)
1115
return dbus.UInt64(self.interval_milliseconds())
2109
1116
self.interval = datetime.timedelta(0, 0, 0, value)
1117
# Emit D-Bus signal
1118
self.PropertyChanged(dbus.String("Interval"),
1119
dbus.UInt64(value, variant_level=1))
2110
1120
if getattr(self, "checker_initiator_tag", None) is None:
2111
1121
return
2112
if self.enabled:
2113
# Reschedule checker run
2114
GLib.source_remove(self.checker_initiator_tag)
2115
self.checker_initiator_tag = GLib.timeout_add(
2116
value, self.start_checker)
2117
self.start_checker() # Start one now, too
1122
# Reschedule checker run
1123
gobject.source_remove(self.checker_initiator_tag)
1124
self.checker_initiator_tag = (gobject.timeout_add
1125
(value, self.start_checker))
1126
self.start_checker() # Start one now, too
2118
1127
2119
1128
# Checker - property
2120
@dbus_service_property(_interface,
2121
signature="s",
1129
@dbus_service_property(_interface, signature="s",
2122
1130
access="readwrite")
2123
1131
def Checker_dbus_property(self, value=None):
2124
1132
if value is None: # get
2125
1133
return dbus.String(self.checker_command)
2126
self.checker_command = str(value)
2127
1134
self.checker_command = value
1135
# Emit D-Bus signal
1136
self.PropertyChanged(dbus.String("Checker"),
1137
dbus.String(self.checker_command,
1138
variant_level=1))
1139
2128
1140
# CheckerRunning - property
2129
@dbus_service_property(_interface,
2130
signature="b",
1141
@dbus_service_property(_interface, signature="b",
2131
1142
access="readwrite")
2132
1143
def CheckerRunning_dbus_property(self, value=None):
2133
1144
if value is None: # get
2136
1147
self.start_checker()
2137
1148
else:
2138
1149
self.stop_checker()
2139
1150
2140
1151
# ObjectPath - property
2141
@dbus_annotations(
2142
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
2143
"org.freedesktop.DBus.Deprecated": "true"})
2144
1152
@dbus_service_property(_interface, signature="o", access="read")
2145
1153
def ObjectPath_dbus_property(self):
2146
return self.dbus_object_path # is already a dbus.ObjectPath
2147
1154
return self.dbus_object_path # is already a dbus.ObjectPath
1155
2148
1156
# Secret = property
2149
@dbus_annotations(
2150
{"org.freedesktop.DBus.Property.EmitsChangedSignal":
2151
"invalidates"})
2152
@dbus_service_property(_interface,
2153
signature="ay",
2154
access="write",
2155
byte_arrays=True)
1157
@dbus_service_property(_interface, signature="ay",
1158
access="write", byte_arrays=True)
2156
1159
def Secret_dbus_property(self, value):
2157
self.secret = bytes(value)
2158
1160
self.secret = str(value)
1161
2159
1162
del _interface
2160
1163
2161
1164
2164
1167
self._pipe = child_pipe
2165
1168
self._pipe.send(('init', fpr, address))
2166
1169
if not self._pipe.recv():
2167
raise KeyError(fpr)
1170
raise KeyError()
2168
1171
2169
1172
def __getattribute__(self, name):
2170
if name == '_pipe':
1173
if(name == '_pipe'):
2171
1174
return super(ProxyClient, self).__getattribute__(name)
2172
1175
self._pipe.send(('getattr', name))
2173
1176
data = self._pipe.recv()
2174
1177
if data[0] == 'data':
2175
1178
return data[1]
2176
1179
if data[0] == 'function':
2177
2178
1180
def func(*args, **kwargs):
2179
1181
self._pipe.send(('funcall', name, args, kwargs))
2180
1182
return self._pipe.recv()[1]
2181
2182
1183
return func
2183
1184
2184
1185
def __setattr__(self, name, value):
2185
if name == '_pipe':
1186
if(name == '_pipe'):
2186
1187
return super(ProxyClient, self).__setattr__(name, value)
2187
1188
self._pipe.send(('setattr', name, value))
2188
1189
2189
1190
2190
1191
class ClientHandler(socketserver.BaseRequestHandler, object):
2191
1192
"""A class to handle client connections.
2192
1193
2193
1194
Instantiated once for each connection to handle it.
2194
1195
Note: This will run in its own forked process."""
2195
1196
2196
1197
def handle(self):
2197
1198
with contextlib.closing(self.server.child_pipe) as child_pipe:
2198
1199
logger.info("TCP connection from: %s",
2199
str(self.client_address))
1200
unicode(self.client_address))
2200
1201
logger.debug("Pipe FD: %d",
2201
1202
self.server.child_pipe.fileno())
2202
1203
2203
session = gnutls.ClientSession(self.request)
2204
2205
# priority = ':'.join(("NONE", "+VERS-TLS1.1",
2206
# "+AES-256-CBC", "+SHA1",
2207
# "+COMP-NULL", "+CTYPE-OPENPGP",
2208
# "+DHE-DSS"))
1204
session = (gnutls.connection
1205
.ClientSession(self.request,
1206
gnutls.connection
1207
.X509Credentials()))
1208
1209
# Note: gnutls.connection.X509Credentials is really a
1210
# generic GnuTLS certificate credentials object so long as
1211
# no X.509 keys are added to it. Therefore, we can use it
1212
# here despite using OpenPGP certificates.
1213
1214
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1215
# "+AES-256-CBC", "+SHA1",
1216
# "+COMP-NULL", "+CTYPE-OPENPGP",
1217
# "+DHE-DSS"))
2209
1218
# Use a fallback default, since this MUST be set.
2210
1219
priority = self.server.gnutls_priority
2211
1220
if priority is None:
2212
1221
priority = "NORMAL"
2213
gnutls.priority_set_direct(session._c_object,
2214
priority.encode("utf-8"),
2215
None)
1222
(gnutls.library.functions
1223
.gnutls_priority_set_direct(session._c_object,
1224
priority, None))
2216
1225
2217
1226
# Start communication using the Mandos protocol
2218
1227
# Get protocol number
2220
1229
logger.debug("Protocol version: %r", line)
2221
1230
try:
2222
1231
if int(line.strip().split()[0]) > 1:
2223
raise RuntimeError(line)
1232
raise RuntimeError
2224
1233
except (ValueError, IndexError, RuntimeError) as error:
2225
1234
logger.error("Unknown protocol version: %s", error)
2226
1235
return
2228
1237
# Start GnuTLS connection
2229
1238
try:
2230
1239
session.handshake()
2231
except gnutls.Error as error:
1240
except gnutls.errors.GNUTLSError as error:
2232
1241
logger.warning("Handshake failed: %s", error)
2233
1242
# Do not run session.bye() here: the session is not
2234
1243
# established. Just abandon the request.
2238
1247
approval_required = False
2239
1248
try:
2240
1249
try:
2241
fpr = self.fingerprint(
2242
self.peer_certificate(session))
2243
except (TypeError, gnutls.Error) as error:
1250
fpr = self.fingerprint(self.peer_certificate
1251
(session))
1252
except (TypeError,
1253
gnutls.errors.GNUTLSError) as error:
2244
1254
logger.warning("Bad certificate: %s", error)
2245
1255
return
2246
1256
logger.debug("Fingerprint: %s", fpr)
2250
1260
self.client_address)
2251
1261
except KeyError:
2252
1262
return
2253
1263
2254
1264
if client.approval_delay:
2255
1265
delay = client.approval_delay
2256
1266
client.approvals_pending += 1
2257
1267
approval_required = True
2258
1268
2259
1269
while True:
2260
1270
if not client.enabled:
2261
1271
logger.info("Client %s is disabled",
2262
client.name)
1272
client.name)
2263
1273
if self.server.use_dbus:
2264
1274
# Emit D-Bus signal
2265
client.Rejected("Disabled")
1275
client.Rejected("Disabled")
2266
1276
return
2267
2268
if client.approved or not client.approval_delay:
2269
# We are approved or approval is disabled
1277
1278
if client._approved or not client.approval_delay:
1279
#We are approved or approval is disabled
2270
1280
break
2271
elif client.approved is None:
1281
elif client._approved is None:
2272
1282
logger.info("Client %s needs approval",
2273
1283
client.name)
2274
1284
if self.server.use_dbus:
2275
1285
# Emit D-Bus signal
2276
1286
client.NeedApproval(
2277
client.approval_delay.total_seconds()
2278
* 1000, client.approved_by_default)
1287
client.approval_delay_milliseconds(),
1288
client.approved_by_default)
2279
1289
else:
2280
1290
logger.warning("Client %s was not approved",
2281
1291
client.name)
2283
1293
# Emit D-Bus signal
2284
1294
client.Rejected("Denied")
2285
1295
return
2286
2287
# wait until timeout or approved
1296
1297
#wait until timeout or approved
1298
#x = float(client._timedelta_to_milliseconds(delay))
2288
1299
time = datetime.datetime.now()
2289
1300
client.changedstate.acquire()
2290
client.changedstate.wait(delay.total_seconds())
1301
client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))
2291
1302
client.changedstate.release()
2292
1303
time2 = datetime.datetime.now()
2293
1304
if (time2 - time) >= delay:
2303
1314
break
2304
1315
else:
2305
1316
delay -= time2 - time
2306
2307
try:
2308
session.send(client.secret)
2309
except gnutls.Error as error:
2310
logger.warning("gnutls send failed",
2311
exc_info=error)
2312
return
1317
1318
sent_size = 0
1319
while sent_size < len(client.secret):
1320
try:
1321
sent = session.send(client.secret[sent_size:])
1322
except gnutls.errors.GNUTLSError as error:
1323
logger.warning("gnutls send failed")
1324
return
1325
logger.debug("Sent: %d, remaining: %d",
1326
sent, len(client.secret)
1327
- (sent_size + sent))
1328
sent_size += sent
2313
1329
2314
1330
logger.info("Sending secret to %s", client.name)
2315
# bump the timeout using extended_timeout
2316
client.bump_timeout(client.extended_timeout)
1331
# bump the timeout as if seen
1332
client.checked_ok()
2317
1333
if self.server.use_dbus:
2318
1334
# Emit D-Bus signal
2319
1335
client.GotSecret()
2320
1336
2321
1337
finally:
2322
1338
if approval_required:
2323
1339
client.approvals_pending -= 1
2324
1340
try:
2325
1341
session.bye()
2326
except gnutls.Error as error:
2327
logger.warning("GnuTLS bye failed",
2328
exc_info=error)
2329
1342
except gnutls.errors.GNUTLSError as error:
1343
logger.warning("GnuTLS bye failed")
1344
2330
1345
@staticmethod
2331
1346
def peer_certificate(session):
2332
1347
"Return the peer's OpenPGP certificate as a bytestring"
2333
1348
# If not an OpenPGP certificate...
2334
if (gnutls.certificate_type_get(session._c_object)
2335
!= gnutls.CRT_OPENPGP):
2336
# ...return invalid data
2337
return b""
1349
if (gnutls.library.functions
1350
.gnutls_certificate_type_get(session._c_object)
1351
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1352
# ...do the normal thing
1353
return session.peer_certificate
2338
1354
list_size = ctypes.c_uint(1)
2339
cert_list = (gnutls.certificate_get_peers
1355
cert_list = (gnutls.library.functions
1356
.gnutls_certificate_get_peers
2340
1357
(session._c_object, ctypes.byref(list_size)))
2341
1358
if not bool(cert_list) and list_size.value != 0:
2342
raise gnutls.Error("error getting peer certificate")
1359
raise gnutls.errors.GNUTLSError("error getting peer"
1360
" certificate")
2343
1361
if list_size.value == 0:
2344
1362
return None
2345
1363
cert = cert_list[0]
2346
1364
return ctypes.string_at(cert.data, cert.size)
2347
1365
2348
1366
@staticmethod
2349
1367
def fingerprint(openpgp):
2350
1368
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
2351
1369
# New GnuTLS "datum" with the OpenPGP public key
2352
datum = gnutls.datum_t(
2353
ctypes.cast(ctypes.c_char_p(openpgp),
2354
ctypes.POINTER(ctypes.c_ubyte)),
2355
ctypes.c_uint(len(openpgp)))
1370
datum = (gnutls.library.types
1371
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1372
ctypes.POINTER
1373
(ctypes.c_ubyte)),
1374
ctypes.c_uint(len(openpgp))))
2356
1375
# New empty GnuTLS certificate
2357
crt = gnutls.openpgp_crt_t()
2358
gnutls.openpgp_crt_init(ctypes.byref(crt))
1376
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1377
(gnutls.library.functions
1378
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
2359
1379
# Import the OpenPGP public key into the certificate
2360
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2361
gnutls.OPENPGP_FMT_RAW)
1380
(gnutls.library.functions
1381
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1382
gnutls.library.constants
1383
.GNUTLS_OPENPGP_FMT_RAW))
2362
1384
# Verify the self signature in the key
2363
1385
crtverify = ctypes.c_uint()
2364
gnutls.openpgp_crt_verify_self(crt, 0,
2365
ctypes.byref(crtverify))
1386
(gnutls.library.functions
1387
.gnutls_openpgp_crt_verify_self(crt, 0,
1388
ctypes.byref(crtverify)))
2366
1389
if crtverify.value != 0:
2367
gnutls.openpgp_crt_deinit(crt)
2368
raise gnutls.CertificateSecurityError(code
2369
=crtverify.value)
1390
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1391
raise (gnutls.errors.CertificateSecurityError
1392
("Verify failed"))
2370
1393
# New buffer for the fingerprint
2371
1394
buf = ctypes.create_string_buffer(20)
2372
1395
buf_len = ctypes.c_size_t()
2373
1396
# Get the fingerprint from the certificate into the buffer
2374
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2375
ctypes.byref(buf_len))
1397
(gnutls.library.functions
1398
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1399
ctypes.byref(buf_len)))
2376
1400
# Deinit the certificate
2377
gnutls.openpgp_crt_deinit(crt)
1401
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2378
1402
# Convert the buffer to a Python bytestring
2379
1403
fpr = ctypes.string_at(buf, buf_len.value)
2380
1404
# Convert the bytestring to hexadecimal notation
2381
hex_fpr = binascii.hexlify(fpr).upper()
1405
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
2382
1406
return hex_fpr
2383
1407
2384
1408
2385
1409
class MultiprocessingMixIn(object):
2386
1410
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2387
2388
1411
def sub_process_main(self, request, address):
2389
1412
try:
2390
1413
self.finish_request(request, address)
2391
except Exception:
1414
except:
2392
1415
self.handle_error(request, address)
2393
1416
self.close_request(request)
2394
1417
2395
1418
def process_request(self, request, address):
2396
1419
"""Start a new process to process the request."""
2397
proc = multiprocessing.Process(target=self.sub_process_main,
2398
args=(request, address))
2399
proc.start()
2400
return proc
2401
1420
multiprocessing.Process(target = self.sub_process_main,
1421
args = (request, address)).start()
2402
1422
2403
1423
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
2404
1424
""" adds a pipe to the MixIn """
2405
2406
1425
def process_request(self, request, client_address):
2407
1426
"""Overrides and wraps the original process_request().
2408
1427
2409
1428
This function creates a new pipe in self.pipe
2410
1429
"""
2411
1430
parent_pipe, self.child_pipe = multiprocessing.Pipe()
2412
1431
2413
proc = MultiprocessingMixIn.process_request(self, request,
2414
client_address)
1432
super(MultiprocessingMixInWithPipe,
1433
self).process_request(request, client_address)
2415
1434
self.child_pipe.close()
2416
self.add_pipe(parent_pipe, proc)
1435
self.add_pipe(parent_pipe)
2417
1436
2418
def add_pipe(self, parent_pipe, proc):
1437
def add_pipe(self, parent_pipe):
2419
1438
"""Dummy function; override as necessary"""
2420
raise NotImplementedError()
2421
1439
raise NotImplementedError
2422
1440
2423
1441
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
2424
1442
socketserver.TCPServer, object):
2425
1443
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
2426
1444
2427
1445
Attributes:
2428
1446
enabled: Boolean; whether this server is activated yet
2429
1447
interface: None or a network interface name (string)
2430
1448
use_ipv6: Boolean; to use IPv6 or not
2431
1449
"""
2432
2433
1450
def __init__(self, server_address, RequestHandlerClass,
2434
interface=None,
2435
use_ipv6=True,
2436
socketfd=None):
2437
"""If socketfd is set, use that file descriptor instead of
2438
creating a new one with socket.socket().
2439
"""
1451
interface=None, use_ipv6=True):
2440
1452
self.interface = interface
2441
1453
if use_ipv6:
2442
1454
self.address_family = socket.AF_INET6
2443
if socketfd is not None:
2444
# Save the file descriptor
2445
self.socketfd = socketfd
2446
# Save the original socket.socket() function
2447
self.socket_socket = socket.socket
2448
2449
# To implement --socket, we monkey patch socket.socket.
2450
#
2451
# (When socketserver.TCPServer is a new-style class, we
2452
# could make self.socket into a property instead of monkey
2453
# patching socket.socket.)
2454
#
2455
# Create a one-time-only replacement for socket.socket()
2456
@functools.wraps(socket.socket)
2457
def socket_wrapper(*args, **kwargs):
2458
# Restore original function so subsequent calls are
2459
# not affected.
2460
socket.socket = self.socket_socket
2461
del self.socket_socket
2462
# This time only, return a new socket object from the
2463
# saved file descriptor.
2464
return socket.fromfd(self.socketfd, *args, **kwargs)
2465
# Replace socket.socket() function with wrapper
2466
socket.socket = socket_wrapper
2467
# The socketserver.TCPServer.__init__ will call
2468
# socket.socket(), which might be our replacement,
2469
# socket_wrapper(), if socketfd was set.
2470
1455
socketserver.TCPServer.__init__(self, server_address,
2471
1456
RequestHandlerClass)
2472
2473
1457
def server_bind(self):
2474
1458
"""This overrides the normal server_bind() function
2475
1459
to bind to an interface if one was specified, and also NOT to
2476
1460
bind to an address or port if they were not specified."""
2477
global SO_BINDTODEVICE
2478
1461
if self.interface is not None:
2479
1462
if SO_BINDTODEVICE is None:
2480
# Fall back to a hard-coded value which seems to be
2481
# common enough.
2482
logger.warning("SO_BINDTODEVICE not found, trying 25")
2483
SO_BINDTODEVICE = 25
2484
try:
2485
self.socket.setsockopt(
2486
socket.SOL_SOCKET, SO_BINDTODEVICE,
2487
(self.interface + "\0").encode("utf-8"))
2488
except socket.error as error:
2489
if error.errno == errno.EPERM:
2490
logger.error("No permission to bind to"
2491
" interface %s", self.interface)
2492
elif error.errno == errno.ENOPROTOOPT:
2493
logger.error("SO_BINDTODEVICE not available;"
2494
" cannot bind to interface %s",
2495
self.interface)
2496
elif error.errno == errno.ENODEV:
2497
logger.error("Interface %s does not exist,"
2498
" cannot bind", self.interface)
2499
else:
2500
raise
1463
logger.error("SO_BINDTODEVICE does not exist;"
1464
" cannot bind to interface %s",
1465
self.interface)
1466
else:
1467
try:
1468
self.socket.setsockopt(socket.SOL_SOCKET,
1469
SO_BINDTODEVICE,
1470
str(self.interface
1471
+ '\0'))
1472
except socket.error as error:
1473
if error[0] == errno.EPERM:
1474
logger.error("No permission to"
1475
" bind to interface %s",
1476
self.interface)
1477
elif error[0] == errno.ENOPROTOOPT:
1478
logger.error("SO_BINDTODEVICE not available;"
1479
" cannot bind to interface %s",
1480
self.interface)
1481
else:
1482
raise
2501
1483
# Only bind(2) the socket if we really need to.
2502
1484
if self.server_address[0] or self.server_address[1]:
2503
1485
if not self.server_address[0]:
2504
1486
if self.address_family == socket.AF_INET6:
2505
any_address = "::" # in6addr_any
1487
any_address = "::" # in6addr_any
2506
1488
else:
2507
any_address = "0.0.0.0" # INADDR_ANY
1489
any_address = socket.INADDR_ANY
2508
1490
self.server_address = (any_address,
2509
1491
self.server_address[1])
2510
1492
elif not self.server_address[1]:
2511
self.server_address = (self.server_address[0], 0)
1493
self.server_address = (self.server_address[0],
1494
0)
2512
1495
# if self.interface:
2513
1496
# self.server_address = (self.server_address[0],
2514
1497
# 0, # port
2520
1503
2521
1504
class MandosServer(IPv6_TCPServer):
2522
1505
"""Mandos server.
2523
1506
2524
1507
Attributes:
2525
1508
clients: set of Client objects
2526
1509
gnutls_priority GnuTLS priority string
2527
1510
use_dbus: Boolean; to emit D-Bus signals or not
2528
2529
Assumes a GLib.MainLoop event loop.
1511
1512
Assumes a gobject.MainLoop event loop.
2530
1513
"""
2531
2532
1514
def __init__(self, server_address, RequestHandlerClass,
2533
interface=None,
2534
use_ipv6=True,
2535
clients=None,
2536
gnutls_priority=None,
2537
use_dbus=True,
2538
socketfd=None):
1515
interface=None, use_ipv6=True, clients=None,
1516
gnutls_priority=None, use_dbus=True):
2539
1517
self.enabled = False
2540
1518
self.clients = clients
2541
1519
if self.clients is None:
2542
self.clients = {}
1520
self.clients = set()
2543
1521
self.use_dbus = use_dbus
2544
1522
self.gnutls_priority = gnutls_priority
2545
1523
IPv6_TCPServer.__init__(self, server_address,
2546
1524
RequestHandlerClass,
2547
interface=interface,
2548
use_ipv6=use_ipv6,
2549
socketfd=socketfd)
2550
1525
interface = interface,
1526
use_ipv6 = use_ipv6)
2551
1527
def server_activate(self):
2552
1528
if self.enabled:
2553
1529
return socketserver.TCPServer.server_activate(self)
2554
2555
1530
def enable(self):
2556
1531
self.enabled = True
2557
2558
def add_pipe(self, parent_pipe, proc):
1532
def add_pipe(self, parent_pipe):
2559
1533
# Call "handle_ipc" for both data and EOF events
2560
GLib.io_add_watch(
2561
parent_pipe.fileno(),
2562
GLib.IO_IN | GLib.IO_HUP,
2563
functools.partial(self.handle_ipc,
2564
parent_pipe=parent_pipe,
2565
proc=proc))
2566
2567
def handle_ipc(self, source, condition,
2568
parent_pipe=None,
2569
proc=None,
1534
gobject.io_add_watch(parent_pipe.fileno(),
1535
gobject.IO_IN | gobject.IO_HUP,
1536
functools.partial(self.handle_ipc,
1537
parent_pipe = parent_pipe))
1538
1539
def handle_ipc(self, source, condition, parent_pipe=None,
2570
1540
client_object=None):
2571
# error, or the other end of multiprocessing.Pipe has closed
2572
if condition & (GLib.IO_ERR | GLib.IO_HUP):
2573
# Wait for other process to exit
2574
proc.join()
1541
condition_names = {
1542
gobject.IO_IN: "IN", # There is data to read.
1543
gobject.IO_OUT: "OUT", # Data can be written (without
1544
# blocking).
1545
gobject.IO_PRI: "PRI", # There is urgent data to read.
1546
gobject.IO_ERR: "ERR", # Error condition.
1547
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1548
# broken, usually for pipes and
1549
# sockets).
1550
}
1551
conditions_string = ' | '.join(name
1552
for cond, name in
1553
condition_names.iteritems()
1554
if cond & condition)
1555
# error or the other end of multiprocessing.Pipe has closed
1556
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
2575
1557
return False
2576
1558
2577
1559
# Read a request from the child
2578
1560
request = parent_pipe.recv()
2579
1561
command = request[0]
2580
1562
2581
1563
if command == 'init':
2582
fpr = request[1].decode("ascii")
1564
fpr = request[1]
2583
1565
address = request[2]
2584
2585
for c in self.clients.values():
1566
1567
for c in self.clients:
2586
1568
if c.fingerprint == fpr:
2587
1569
client = c
2588
1570
break
2591
1573
"dress: %s", fpr, address)
2592
1574
if self.use_dbus:
2593
1575
# Emit D-Bus signal
2594
mandos_dbus_service.ClientNotFound(fpr,
2595
address[0])
1576
mandos_dbus_service.ClientNotFound(fpr, address[0])
2596
1577
parent_pipe.send(False)
2597
1578
return False
2598
2599
GLib.io_add_watch(
2600
parent_pipe.fileno(),
2601
GLib.IO_IN | GLib.IO_HUP,
2602
functools.partial(self.handle_ipc,
2603
parent_pipe=parent_pipe,
2604
proc=proc,
2605
client_object=client))
1579
1580
gobject.io_add_watch(parent_pipe.fileno(),
1581
gobject.IO_IN | gobject.IO_HUP,
1582
functools.partial(self.handle_ipc,
1583
parent_pipe = parent_pipe,
1584
client_object = client))
2606
1585
parent_pipe.send(True)
2607
# remove the old hook in favor of the new above hook on
2608
# same fileno
1586
# remove the old hook in favor of the new above hook on same fileno
2609
1587
return False
2610
1588
if command == 'funcall':
2611
1589
funcname = request[1]
2612
1590
args = request[2]
2613
1591
kwargs = request[3]
2614
2615
parent_pipe.send(('data', getattr(client_object,
2616
funcname)(*args,
2617
**kwargs)))
1592
1593
parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))
2618
1594
2619
1595
if command == 'getattr':
2620
1596
attrname = request[1]
2621
if isinstance(client_object.__getattribute__(attrname),
2622
collections.Callable):
2623
parent_pipe.send(('function', ))
1597
if callable(client_object.__getattribute__(attrname)):
1598
parent_pipe.send(('function',))
2624
1599
else:
2625
parent_pipe.send((
2626
'data', client_object.__getattribute__(attrname)))
2627
1600
parent_pipe.send(('data', client_object.__getattribute__(attrname)))
1601
2628
1602
if command == 'setattr':
2629
1603
attrname = request[1]
2630
1604
value = request[2]
2633
1607
return True
2634
1608
2635
1609
2636
def rfc3339_duration_to_delta(duration):
2637
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2638
2639
>>> rfc3339_duration_to_delta("P7D")
2640
datetime.timedelta(7)
2641
>>> rfc3339_duration_to_delta("PT60S")
2642
datetime.timedelta(0, 60)
2643
>>> rfc3339_duration_to_delta("PT60M")
2644
datetime.timedelta(0, 3600)
2645
>>> rfc3339_duration_to_delta("PT24H")
2646
datetime.timedelta(1)
2647
>>> rfc3339_duration_to_delta("P1W")
2648
datetime.timedelta(7)
2649
>>> rfc3339_duration_to_delta("PT5M30S")
2650
datetime.timedelta(0, 330)
2651
>>> rfc3339_duration_to_delta("P1DT3M20S")
2652
datetime.timedelta(1, 200)
2653
"""
2654
2655
# Parsing an RFC 3339 duration with regular expressions is not
2656
# possible - there would have to be multiple places for the same
2657
# values, like seconds. The current code, while more esoteric, is
2658
# cleaner without depending on a parsing library. If Python had a
2659
# built-in library for parsing we would use it, but we'd like to
2660
# avoid excessive use of external libraries.
2661
2662
# New type for defining tokens, syntax, and semantics all-in-one
2663
Token = collections.namedtuple("Token", (
2664
"regexp", # To match token; if "value" is not None, must have
2665
# a "group" containing digits
2666
"value", # datetime.timedelta or None
2667
"followers")) # Tokens valid after this token
2668
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2669
# the "duration" ABNF definition in RFC 3339, Appendix A.
2670
token_end = Token(re.compile(r"$"), None, frozenset())
2671
token_second = Token(re.compile(r"(\d+)S"),
2672
datetime.timedelta(seconds=1),
2673
frozenset((token_end, )))
2674
token_minute = Token(re.compile(r"(\d+)M"),
2675
datetime.timedelta(minutes=1),
2676
frozenset((token_second, token_end)))
2677
token_hour = Token(re.compile(r"(\d+)H"),
2678
datetime.timedelta(hours=1),
2679
frozenset((token_minute, token_end)))
2680
token_time = Token(re.compile(r"T"),
2681
None,
2682
frozenset((token_hour, token_minute,
2683
token_second)))
2684
token_day = Token(re.compile(r"(\d+)D"),
2685
datetime.timedelta(days=1),
2686
frozenset((token_time, token_end)))
2687
token_month = Token(re.compile(r"(\d+)M"),
2688
datetime.timedelta(weeks=4),
2689
frozenset((token_day, token_end)))
2690
token_year = Token(re.compile(r"(\d+)Y"),
2691
datetime.timedelta(weeks=52),
2692
frozenset((token_month, token_end)))
2693
token_week = Token(re.compile(r"(\d+)W"),
2694
datetime.timedelta(weeks=1),
2695
frozenset((token_end, )))
2696
token_duration = Token(re.compile(r"P"), None,
2697
frozenset((token_year, token_month,
2698
token_day, token_time,
2699
token_week)))
2700
# Define starting values:
2701
# Value so far
2702
value = datetime.timedelta()
2703
found_token = None
2704
# Following valid tokens
2705
followers = frozenset((token_duration, ))
2706
# String left to parse
2707
s = duration
2708
# Loop until end token is found
2709
while found_token is not token_end:
2710
# Search for any currently valid tokens
2711
for token in followers:
2712
match = token.regexp.match(s)
2713
if match is not None:
2714
# Token found
2715
if token.value is not None:
2716
# Value found, parse digits
2717
factor = int(match.group(1), 10)
2718
# Add to value so far
2719
value += factor * token.value
2720
# Strip token from string
2721
s = token.regexp.sub("", s, 1)
2722
# Go to found token
2723
found_token = token
2724
# Set valid next tokens
2725
followers = found_token.followers
2726
break
2727
else:
2728
# No currently valid tokens were found
2729
raise ValueError("Invalid RFC 3339 duration: {!r}"
2730
.format(duration))
2731
# End token found
2732
return value
2733
2734
2735
1610
def string_to_delta(interval):
2736
1611
"""Parse a string and return a datetime.timedelta
2737
1612
2738
1613
>>> string_to_delta('7d')
2739
1614
datetime.timedelta(7)
2740
1615
>>> string_to_delta('60s')
2748
1623
>>> string_to_delta('5m 30s')
2749
1624
datetime.timedelta(0, 330)
2750
1625
"""
2751
2752
try:
2753
return rfc3339_duration_to_delta(interval)
2754
except ValueError:
2755
pass
2756
2757
1626
timevalue = datetime.timedelta(0)
2758
1627
for s in interval.split():
2759
1628
try:
2760
suffix = s[-1]
1629
suffix = unicode(s[-1])
2761
1630
value = int(s[:-1])
2762
1631
if suffix == "d":
2763
1632
delta = datetime.timedelta(value)
2770
1639
elif suffix == "w":
2771
1640
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
2772
1641
else:
2773
raise ValueError("Unknown suffix {!r}".format(suffix))
2774
except IndexError as e:
1642
raise ValueError("Unknown suffix %r" % suffix)
1643
except (ValueError, IndexError) as e:
2775
1644
raise ValueError(*(e.args))
2776
1645
timevalue += delta
2777
1646
return timevalue
2778
1647
2779
1648
2780
def daemon(nochdir=False, noclose=False):
1649
def if_nametoindex(interface):
1650
"""Call the C function if_nametoindex(), or equivalent
1651
1652
Note: This function cannot accept a unicode string."""
1653
global if_nametoindex
1654
try:
1655
if_nametoindex = (ctypes.cdll.LoadLibrary
1656
(ctypes.util.find_library("c"))
1657
.if_nametoindex)
1658
except (OSError, AttributeError):
1659
logger.warning("Doing if_nametoindex the hard way")
1660
def if_nametoindex(interface):
1661
"Get an interface index the hard way, i.e. using fcntl()"
1662
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1663
with contextlib.closing(socket.socket()) as s:
1664
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1665
struct.pack(str("16s16x"),
1666
interface))
1667
interface_index = struct.unpack(str("I"),
1668
ifreq[16:20])[0]
1669
return interface_index
1670
return if_nametoindex(interface)
1671
1672
1673
def daemon(nochdir = False, noclose = False):
2781
1674
"""See daemon(3). Standard BSD Unix function.
2782
1675
2783
1676
This should really exist as os.daemon, but it doesn't (yet)."""
2784
1677
if os.fork():
2785
1678
sys.exit()
2790
1683
sys.exit()
2791
1684
if not noclose:
2792
1685
# Close all standard open file descriptors
2793
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1686
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2794
1687
if not stat.S_ISCHR(os.fstat(null).st_mode):
2795
1688
raise OSError(errno.ENODEV,
2796
"{} not a character device"
2797
.format(os.devnull))
1689
"%s not a character device"
1690
% os.path.devnull)
2798
1691
os.dup2(null, sys.stdin.fileno())
2799
1692
os.dup2(null, sys.stdout.fileno())
2800
1693
os.dup2(null, sys.stderr.fileno())
2803
1696
2804
1697
2805
1698
def main():
2806
1699
2807
1700
##################################################################
2808
1701
# Parsing of options, both command line and config file
2809
1702
2810
1703
parser = argparse.ArgumentParser()
2811
1704
parser.add_argument("-v", "--version", action="version",
2812
version="%(prog)s {}".format(version),
1705
version = "%%(prog)s %s" % version,
2813
1706
help="show version number and exit")
2814
1707
parser.add_argument("-i", "--interface", metavar="IF",
2815
1708
help="Bind to interface IF")
2821
1714
help="Run self-test")
2822
1715
parser.add_argument("--debug", action="store_true",
2823
1716
help="Debug mode; run in foreground and log"
2824
" to terminal", default=None)
1717
" to terminal")
2825
1718
parser.add_argument("--debuglevel", metavar="LEVEL",
2826
1719
help="Debug level for stdout output")
2827
1720
parser.add_argument("--priority", help="GnuTLS"
2834
1727
" files")
2835
1728
parser.add_argument("--no-dbus", action="store_false",
2836
1729
dest="use_dbus", help="Do not provide D-Bus"
2837
" system bus interface", default=None)
1730
" system bus interface")
2838
1731
parser.add_argument("--no-ipv6", action="store_false",
2839
dest="use_ipv6", help="Do not use IPv6",
2840
default=None)
2841
parser.add_argument("--no-restore", action="store_false",
2842
dest="restore", help="Do not restore stored"
2843
" state", default=None)
2844
parser.add_argument("--socket", type=int,
2845
help="Specify a file descriptor to a network"
2846
" socket to use instead of creating one")
2847
parser.add_argument("--statedir", metavar="DIR",
2848
help="Directory to save/restore state in")
2849
parser.add_argument("--foreground", action="store_true",
2850
help="Run in foreground", default=None)
2851
parser.add_argument("--no-zeroconf", action="store_false",
2852
dest="zeroconf", help="Do not use Zeroconf",
2853
default=None)
2854
1732
dest="use_ipv6", help="Do not use IPv6")
2855
1733
options = parser.parse_args()
2856
1734
2857
1735
if options.check:
2858
1736
import doctest
2859
fail_count, test_count = doctest.testmod()
2860
sys.exit(os.EX_OK if fail_count == 0 else 1)
2861
1737
doctest.testmod()
1738
sys.exit()
1739
2862
1740
# Default values for config file for server-global settings
2863
server_defaults = {"interface": "",
2864
"address": "",
2865
"port": "",
2866
"debug": "False",
2867
"priority":
2868
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2869
":+SIGN-DSA-SHA256",
2870
"servicename": "Mandos",
2871
"use_dbus": "True",
2872
"use_ipv6": "True",
2873
"debuglevel": "",
2874
"restore": "True",
2875
"socket": "",
2876
"statedir": "/var/lib/mandos",
2877
"foreground": "False",
2878
"zeroconf": "True",
2879
}
2880
1741
server_defaults = { "interface": "",
1742
"address": "",
1743
"port": "",
1744
"debug": "False",
1745
"priority":
1746
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1747
"servicename": "Mandos",
1748
"use_dbus": "True",
1749
"use_ipv6": "True",
1750
"debuglevel": "",
1751
}
1752
2881
1753
# Parse config file for server-global settings
2882
1754
server_config = configparser.SafeConfigParser(server_defaults)
2883
1755
del server_defaults
2884
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1756
server_config.read(os.path.join(options.configdir,
1757
"mandos.conf"))
2885
1758
# Convert the SafeConfigParser object to a dict
2886
1759
server_settings = server_config.defaults()
2887
1760
# Use the appropriate methods on the non-string config options
2888
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2889
"foreground", "zeroconf"):
1761
for option in ("debug", "use_dbus", "use_ipv6"):
2890
1762
server_settings[option] = server_config.getboolean("DEFAULT",
2891
1763
option)
2892
1764
if server_settings["port"]:
2893
1765
server_settings["port"] = server_config.getint("DEFAULT",
2894
1766
"port")
2895
if server_settings["socket"]:
2896
server_settings["socket"] = server_config.getint("DEFAULT",
2897
"socket")
2898
# Later, stdin will, and stdout and stderr might, be dup'ed
2899
# over with an opened os.devnull. But we don't want this to
2900
# happen with a supplied network socket.
2901
if 0 <= server_settings["socket"] <= 2:
2902
server_settings["socket"] = os.dup(server_settings
2903
["socket"])
2904
1767
del server_config
2905
1768
2906
1769
# Override the settings from the config file with command line
2907
1770
# options, if set.
2908
1771
for option in ("interface", "address", "port", "debug",
2909
"priority", "servicename", "configdir", "use_dbus",
2910
"use_ipv6", "debuglevel", "restore", "statedir",
2911
"socket", "foreground", "zeroconf"):
1772
"priority", "servicename", "configdir",
1773
"use_dbus", "use_ipv6", "debuglevel"):
2912
1774
value = getattr(options, option)
2913
1775
if value is not None:
2914
1776
server_settings[option] = value
2915
1777
del options
2916
1778
# Force all strings to be unicode
2917
1779
for option in server_settings.keys():
2918
if isinstance(server_settings[option], bytes):
2919
server_settings[option] = (server_settings[option]
2920
.decode("utf-8"))
2921
# Force all boolean options to be boolean
2922
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2923
"foreground", "zeroconf"):
2924
server_settings[option] = bool(server_settings[option])
2925
# Debug implies foreground
2926
if server_settings["debug"]:
2927
server_settings["foreground"] = True
1780
if type(server_settings[option]) is str:
1781
server_settings[option] = unicode(server_settings[option])
2928
1782
# Now we have our good server settings in "server_settings"
2929
1783
2930
1784
##################################################################
2931
2932
if (not server_settings["zeroconf"]
2933
and not (server_settings["port"]
2934
or server_settings["socket"] != "")):
2935
parser.error("Needs port or socket to work without Zeroconf")
2936
1785
2937
1786
# For convenience
2938
1787
debug = server_settings["debug"]
2939
1788
debuglevel = server_settings["debuglevel"]
2940
1789
use_dbus = server_settings["use_dbus"]
2941
1790
use_ipv6 = server_settings["use_ipv6"]
2942
stored_state_path = os.path.join(server_settings["statedir"],
2943
stored_state_file)
2944
foreground = server_settings["foreground"]
2945
zeroconf = server_settings["zeroconf"]
2946
2947
if debug:
2948
initlogger(debug, logging.DEBUG)
2949
else:
2950
if not debuglevel:
2951
initlogger(debug)
2952
else:
2953
level = getattr(logging, debuglevel.upper())
2954
initlogger(debug, level)
2955
1791
2956
1792
if server_settings["servicename"] != "Mandos":
2957
syslogger.setFormatter(
2958
logging.Formatter('Mandos ({}) [%(process)d]:'
2959
' %(levelname)s: %(message)s'.format(
2960
server_settings["servicename"])))
2961
1793
syslogger.setFormatter(logging.Formatter
1794
('Mandos (%s) [%%(process)d]:'
1795
' %%(levelname)s: %%(message)s'
1796
% server_settings["servicename"]))
1797
2962
1798
# Parse config file with clients
2963
client_config = configparser.SafeConfigParser(Client
2964
.client_defaults)
1799
client_defaults = { "timeout": "1h",
1800
"interval": "5m",
1801
"checker": "fping -q -- %%(host)s",
1802
"host": "",
1803
"approval_delay": "0s",
1804
"approval_duration": "1s",
1805
}
1806
client_config = configparser.SafeConfigParser(client_defaults)
2965
1807
client_config.read(os.path.join(server_settings["configdir"],
2966
1808
"clients.conf"))
2967
1809
2968
1810
global mandos_dbus_service
2969
1811
mandos_dbus_service = None
2970
2971
socketfd = None
2972
if server_settings["socket"] != "":
2973
socketfd = server_settings["socket"]
2974
tcp_server = MandosServer(
2975
(server_settings["address"], server_settings["port"]),
2976
ClientHandler,
2977
interface=(server_settings["interface"] or None),
2978
use_ipv6=use_ipv6,
2979
gnutls_priority=server_settings["priority"],
2980
use_dbus=use_dbus,
2981
socketfd=socketfd)
2982
if not foreground:
2983
pidfilename = "/run/mandos.pid"
2984
if not os.path.isdir("/run/."):
2985
pidfilename = "/var/run/mandos.pid"
2986
pidfile = None
2987
try:
2988
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
2989
except IOError as e:
2990
logger.error("Could not open file %r", pidfilename,
2991
exc_info=e)
2992
2993
for name, group in (("_mandos", "_mandos"),
2994
("mandos", "mandos"),
2995
("nobody", "nogroup")):
2996
try:
2997
uid = pwd.getpwnam(name).pw_uid
2998
gid = pwd.getpwnam(group).pw_gid
2999
break
1812
1813
tcp_server = MandosServer((server_settings["address"],
1814
server_settings["port"]),
1815
ClientHandler,
1816
interface=(server_settings["interface"]
1817
or None),
1818
use_ipv6=use_ipv6,
1819
gnutls_priority=
1820
server_settings["priority"],
1821
use_dbus=use_dbus)
1822
if not debug:
1823
pidfilename = "/var/run/mandos.pid"
1824
try:
1825
pidfile = open(pidfilename, "w")
1826
except IOError:
1827
logger.error("Could not open file %r", pidfilename)
1828
1829
try:
1830
uid = pwd.getpwnam("_mandos").pw_uid
1831
gid = pwd.getpwnam("_mandos").pw_gid
1832
except KeyError:
1833
try:
1834
uid = pwd.getpwnam("mandos").pw_uid
1835
gid = pwd.getpwnam("mandos").pw_gid
3000
1836
except KeyError:
3001
continue
3002
else:
3003
uid = 65534
3004
gid = 65534
1837
try:
1838
uid = pwd.getpwnam("nobody").pw_uid
1839
gid = pwd.getpwnam("nobody").pw_gid
1840
except KeyError:
1841
uid = 65534
1842
gid = 65534
3005
1843
try:
3006
1844
os.setgid(gid)
3007
1845
os.setuid(uid)
3008
if debug:
3009
logger.debug("Did setuid/setgid to {}:{}".format(uid,
3010
gid))
3011
1846
except OSError as error:
3012
logger.warning("Failed to setuid/setgid to {}:{}: {}"
3013
.format(uid, gid, os.strerror(error.errno)))
3014
if error.errno != errno.EPERM:
3015
raise
1847
if error[0] != errno.EPERM:
1848
raise error
1849
1850
if not debug and not debuglevel:
1851
syslogger.setLevel(logging.WARNING)
1852
console.setLevel(logging.WARNING)
1853
if debuglevel:
1854
level = getattr(logging, debuglevel.upper())
1855
syslogger.setLevel(level)
1856
console.setLevel(level)
3016
1857
3017
1858
if debug:
3018
1859
# Enable all possible GnuTLS debugging
3019
1860
3020
1861
# "Use a log level over 10 to enable all debugging options."
3021
1862
# - GnuTLS manual
3022
gnutls.global_set_log_level(11)
3023
3024
@gnutls.log_func
1863
gnutls.library.functions.gnutls_global_set_log_level(11)
1864
1865
@gnutls.library.types.gnutls_log_func
3025
1866
def debug_gnutls(level, string):
3026
1867
logger.debug("GnuTLS: %s", string[:-1])
3027
3028
gnutls.global_set_log_function(debug_gnutls)
3029
1868
1869
(gnutls.library.functions
1870
.gnutls_global_set_log_function(debug_gnutls))
1871
3030
1872
# Redirect stdin so all checkers get /dev/null
3031
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1873
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
3032
1874
os.dup2(null, sys.stdin.fileno())
3033
1875
if null > 2:
3034
1876
os.close(null)
3035
1877
else:
1878
# No console logging
1879
logger.removeHandler(console)
1880
3036
1881
# Need to fork before connecting to D-Bus
3037
if not foreground:
1882
if not debug:
3038
1883
# Close all input and output, do double fork, etc.
3039
1884
daemon()
3040
3041
# multiprocessing will use threads, so before we use GLib we need
3042
# to inform GLib that threads will be used.
3043
GLib.threads_init()
3044
1885
3045
1886
global main_loop
3046
1887
# From the Avahi example code
3047
DBusGMainLoop(set_as_default=True)
3048
main_loop = GLib.MainLoop()
1888
DBusGMainLoop(set_as_default=True )
1889
main_loop = gobject.MainLoop()
3049
1890
bus = dbus.SystemBus()
3050
1891
# End of Avahi example code
3051
1892
if use_dbus:
3052
1893
try:
3053
bus_name = dbus.service.BusName("se.recompile.Mandos",
3054
bus,
3055
do_not_queue=True)
3056
old_bus_name = dbus.service.BusName(
3057
"se.bsnet.fukt.Mandos", bus,
3058
do_not_queue=True)
3059
except dbus.exceptions.DBusException as e:
3060
logger.error("Disabling D-Bus:", exc_info=e)
1894
bus_name = dbus.service.BusName("se.bsnet.fukt.Mandos",
1895
bus, do_not_queue=True)
1896
except dbus.exceptions.NameExistsException as e:
1897
logger.error(unicode(e) + ", disabling D-Bus")
3061
1898
use_dbus = False
3062
1899
server_settings["use_dbus"] = False
3063
1900
tcp_server.use_dbus = False
3064
if zeroconf:
3065
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3066
service = AvahiServiceToSyslog(
3067
name=server_settings["servicename"],
3068
servicetype="_mandos._tcp",
3069
protocol=protocol,
3070
bus=bus)
3071
if server_settings["interface"]:
3072
service.interface = if_nametoindex(
3073
server_settings["interface"].encode("utf-8"))
3074
1901
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1902
service = AvahiService(name = server_settings["servicename"],
1903
servicetype = "_mandos._tcp",
1904
protocol = protocol, bus = bus)
1905
if server_settings["interface"]:
1906
service.interface = (if_nametoindex
1907
(str(server_settings["interface"])))
1908
3075
1909
global multiprocessing_manager
3076
1910
multiprocessing_manager = multiprocessing.Manager()
3077
1911
3078
1912
client_class = Client
3079
1913
if use_dbus:
3080
client_class = functools.partial(ClientDBus, bus=bus)
3081
3082
client_settings = Client.config_parser(client_config)
3083
old_client_settings = {}
3084
clients_data = {}
3085
3086
# This is used to redirect stdout and stderr for checker processes
3087
global wnull
3088
wnull = open(os.devnull, "w") # A writable /dev/null
3089
# Only used if server is running in foreground but not in debug
3090
# mode
3091
if debug or not foreground:
3092
wnull.close()
3093
3094
# Get client data and settings from last running state.
3095
if server_settings["restore"]:
3096
try:
3097
with open(stored_state_path, "rb") as stored_state:
3098
if sys.version_info.major == 2:
3099
clients_data, old_client_settings = pickle.load(
3100
stored_state)
3101
else:
3102
bytes_clients_data, bytes_old_client_settings = (
3103
pickle.load(stored_state, encoding="bytes"))
3104
# Fix bytes to strings
3105
# clients_data
3106
# .keys()
3107
clients_data = {(key.decode("utf-8")
3108
if isinstance(key, bytes)
3109
else key): value
3110
for key, value in
3111
bytes_clients_data.items()}
3112
del bytes_clients_data
3113
for key in clients_data:
3114
value = {(k.decode("utf-8")
3115
if isinstance(k, bytes) else k): v
3116
for k, v in
3117
clients_data[key].items()}
3118
clients_data[key] = value
3119
# .client_structure
3120
value["client_structure"] = [
3121
(s.decode("utf-8")
3122
if isinstance(s, bytes)
3123
else s) for s in
3124
value["client_structure"]]
3125
# .name & .host
3126
for k in ("name", "host"):
3127
if isinstance(value[k], bytes):
3128
value[k] = value[k].decode("utf-8")
3129
# old_client_settings
3130
# .keys()
3131
old_client_settings = {
3132
(key.decode("utf-8")
3133
if isinstance(key, bytes)
3134
else key): value
3135
for key, value in
3136
bytes_old_client_settings.items()}
3137
del bytes_old_client_settings
3138
# .host
3139
for value in old_client_settings.values():
3140
if isinstance(value["host"], bytes):
3141
value["host"] = (value["host"]
3142
.decode("utf-8"))
3143
os.remove(stored_state_path)
3144
except IOError as e:
3145
if e.errno == errno.ENOENT:
3146
logger.warning("Could not load persistent state:"
3147
" {}".format(os.strerror(e.errno)))
3148
else:
3149
logger.critical("Could not load persistent state:",
3150
exc_info=e)
3151
raise
3152
except EOFError as e:
3153
logger.warning("Could not load persistent state: "
3154
"EOFError:",
3155
exc_info=e)
3156
3157
with PGPEngine() as pgp:
3158
for client_name, client in clients_data.items():
3159
# Skip removed clients
3160
if client_name not in client_settings:
3161
continue
3162
3163
# Decide which value to use after restoring saved state.
3164
# We have three different values: Old config file,
3165
# new config file, and saved state.
3166
# New config value takes precedence if it differs from old
3167
# config value, otherwise use saved state.
3168
for name, value in client_settings[client_name].items():
3169
try:
3170
# For each value in new config, check if it
3171
# differs from the old config value (Except for
3172
# the "secret" attribute)
3173
if (name != "secret"
3174
and (value !=
3175
old_client_settings[client_name][name])):
3176
client[name] = value
3177
except KeyError:
3178
pass
3179
3180
# Clients who has passed its expire date can still be
3181
# enabled if its last checker was successful. A Client
3182
# whose checker succeeded before we stored its state is
3183
# assumed to have successfully run all checkers during
3184
# downtime.
3185
if client["enabled"]:
3186
if datetime.datetime.utcnow() >= client["expires"]:
3187
if not client["last_checked_ok"]:
3188
logger.warning(
3189
"disabling client {} - Client never "
3190
"performed a successful checker".format(
3191
client_name))
3192
client["enabled"] = False
3193
elif client["last_checker_status"] != 0:
3194
logger.warning(
3195
"disabling client {} - Client last"
3196
" checker failed with error code"
3197
" {}".format(
3198
client_name,
3199
client["last_checker_status"]))
3200
client["enabled"] = False
3201
else:
3202
client["expires"] = (
3203
datetime.datetime.utcnow()
3204
+ client["timeout"])
3205
logger.debug("Last checker succeeded,"
3206
" keeping {} enabled".format(
3207
client_name))
1914
client_class = functools.partial(ClientDBus, bus = bus)
1915
def client_config_items(config, section):
1916
special_settings = {
1917
"approved_by_default":
1918
lambda: config.getboolean(section,
1919
"approved_by_default"),
1920
}
1921
for name, value in config.items(section):
3208
1922
try:
3209
client["secret"] = pgp.decrypt(
3210
client["encrypted_secret"],
3211
client_settings[client_name]["secret"])
3212
except PGPError:
3213
# If decryption fails, we use secret from new settings
3214
logger.debug("Failed to decrypt {} old secret".format(
3215
client_name))
3216
client["secret"] = (client_settings[client_name]
3217
["secret"])
3218
3219
# Add/remove clients based on new changes made to config
3220
for client_name in (set(old_client_settings)
3221
- set(client_settings)):
3222
del clients_data[client_name]
3223
for client_name in (set(client_settings)
3224
- set(old_client_settings)):
3225
clients_data[client_name] = client_settings[client_name]
3226
3227
# Create all client objects
3228
for client_name, client in clients_data.items():
3229
tcp_server.clients[client_name] = client_class(
3230
name=client_name,
3231
settings=client,
3232
server_settings=server_settings)
3233
1923
yield (name, special_settings[name]())
1924
except KeyError:
1925
yield (name, value)
1926
1927
tcp_server.clients.update(set(
1928
client_class(name = section,
1929
config= dict(client_config_items(
1930
client_config, section)))
1931
for section in client_config.sections()))
3234
1932
if not tcp_server.clients:
3235
1933
logger.warning("No clients defined")
3236
3237
if not foreground:
3238
if pidfile is not None:
3239
pid = os.getpid()
3240
try:
3241
with pidfile:
3242
print(pid, file=pidfile)
3243
except IOError:
3244
logger.error("Could not write to file %r with PID %d",
3245
pidfilename, pid)
3246
del pidfile
1934
1935
if not debug:
1936
try:
1937
with pidfile:
1938
pid = os.getpid()
1939
pidfile.write(str(pid) + "\n".encode("utf-8"))
1940
del pidfile
1941
except IOError:
1942
logger.error("Could not write to file %r with PID %d",
1943
pidfilename, pid)
1944
except NameError:
1945
# "pidfile" was never created
1946
pass
3247
1947
del pidfilename
3248
3249
for termsig in (signal.SIGHUP, signal.SIGTERM):
3250
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3251
lambda: main_loop.quit() and False)
3252
1948
1949
signal.signal(signal.SIGINT, signal.SIG_IGN)
1950
1951
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1952
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1953
3253
1954
if use_dbus:
3254
3255
@alternate_dbus_interfaces(
3256
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3257
class MandosDBusService(DBusObjectWithObjectManager):
1955
class MandosDBusService(dbus.service.Object):
3258
1956
"""A D-Bus proxy object"""
3259
3260
1957
def __init__(self):
3261
1958
dbus.service.Object.__init__(self, bus, "/")
3262
3263
_interface = "se.recompile.Mandos"
3264
1959
_interface = "se.bsnet.fukt.Mandos"
1960
3265
1961
@dbus.service.signal(_interface, signature="o")
3266
1962
def ClientAdded(self, objpath):
3267
1963
"D-Bus signal"
3268
1964
pass
3269
1965
3270
1966
@dbus.service.signal(_interface, signature="ss")
3271
1967
def ClientNotFound(self, fingerprint, address):
3272
1968
"D-Bus signal"
3273
1969
pass
3274
3275
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3276
"true"})
1970
3277
1971
@dbus.service.signal(_interface, signature="os")
3278
1972
def ClientRemoved(self, objpath, name):
3279
1973
"D-Bus signal"
3280
1974
pass
3281
3282
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3283
"true"})
1975
3284
1976
@dbus.service.method(_interface, out_signature="ao")
3285
1977
def GetAllClients(self):
3286
1978
"D-Bus method"
3287
return dbus.Array(c.dbus_object_path for c in
3288
tcp_server.clients.values())
3289
3290
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3291
"true"})
1979
return dbus.Array(c.dbus_object_path
1980
for c in tcp_server.clients)
1981
3292
1982
@dbus.service.method(_interface,
3293
1983
out_signature="a{oa{sv}}")
3294
1984
def GetAllClientsWithProperties(self):
3295
1985
"D-Bus method"
3296
1986
return dbus.Dictionary(
3297
{c.dbus_object_path: c.GetAll(
3298
"se.recompile.Mandos.Client")
3299
for c in tcp_server.clients.values()},
1987
((c.dbus_object_path, c.GetAll(""))
1988
for c in tcp_server.clients),
3300
1989
signature="oa{sv}")
3301
1990
3302
1991
@dbus.service.method(_interface, in_signature="o")
3303
1992
def RemoveClient(self, object_path):
3304
1993
"D-Bus method"
3305
for c in tcp_server.clients.values():
1994
for c in tcp_server.clients:
3306
1995
if c.dbus_object_path == object_path:
3307
del tcp_server.clients[c.name]
1996
tcp_server.clients.remove(c)
3308
1997
c.remove_from_connection()
3309
# Don't signal the disabling
1998
# Don't signal anything except ClientRemoved
3310
1999
c.disable(quiet=True)
3311
# Emit D-Bus signal for removal
3312
self.client_removed_signal(c)
2000
# Emit D-Bus signal
2001
self.ClientRemoved(object_path, c.name)
3313
2002
return
3314
2003
raise KeyError(object_path)
3315
2004
3316
2005
del _interface
3317
3318
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3319
out_signature="a{oa{sa{sv}}}")
3320
def GetManagedObjects(self):
3321
"""D-Bus method"""
3322
return dbus.Dictionary(
3323
{client.dbus_object_path:
3324
dbus.Dictionary(
3325
{interface: client.GetAll(interface)
3326
for interface in
3327
client._get_all_interface_names()})
3328
for client in tcp_server.clients.values()})
3329
3330
def client_added_signal(self, client):
3331
"""Send the new standard signal and the old signal"""
3332
if use_dbus:
3333
# New standard signal
3334
self.InterfacesAdded(
3335
client.dbus_object_path,
3336
dbus.Dictionary(
3337
{interface: client.GetAll(interface)
3338
for interface in
3339
client._get_all_interface_names()}))
3340
# Old signal
3341
self.ClientAdded(client.dbus_object_path)
3342
3343
def client_removed_signal(self, client):
3344
"""Send the new standard signal and the old signal"""
3345
if use_dbus:
3346
# New standard signal
3347
self.InterfacesRemoved(
3348
client.dbus_object_path,
3349
client._get_all_interface_names())
3350
# Old signal
3351
self.ClientRemoved(client.dbus_object_path,
3352
client.name)
3353
2006
3354
2007
mandos_dbus_service = MandosDBusService()
3355
3356
# Save modules to variables to exempt the modules from being
3357
# unloaded before the function registered with atexit() is run.
3358
mp = multiprocessing
3359
wn = wnull
3360
2008
3361
2009
def cleanup():
3362
2010
"Cleanup function; run on exit"
3363
if zeroconf:
3364
service.cleanup()
3365
3366
mp.active_children()
3367
wn.close()
3368
if not (tcp_server.clients or client_settings):
3369
return
3370
3371
# Store client before exiting. Secrets are encrypted with key
3372
# based on what config file has. If config file is
3373
# removed/edited, old secret will thus be unrecovable.
3374
clients = {}
3375
with PGPEngine() as pgp:
3376
for client in tcp_server.clients.values():
3377
key = client_settings[client.name]["secret"]
3378
client.encrypted_secret = pgp.encrypt(client.secret,
3379
key)
3380
client_dict = {}
3381
3382
# A list of attributes that can not be pickled
3383
# + secret.
3384
exclude = {"bus", "changedstate", "secret",
3385
"checker", "server_settings"}
3386
for name, typ in inspect.getmembers(dbus.service
3387
.Object):
3388
exclude.add(name)
3389
3390
client_dict["encrypted_secret"] = (client
3391
.encrypted_secret)
3392
for attr in client.client_structure:
3393
if attr not in exclude:
3394
client_dict[attr] = getattr(client, attr)
3395
3396
clients[client.name] = client_dict
3397
del client_settings[client.name]["secret"]
3398
3399
try:
3400
with tempfile.NamedTemporaryFile(
3401
mode='wb',
3402
suffix=".pickle",
3403
prefix='clients-',
3404
dir=os.path.dirname(stored_state_path),
3405
delete=False) as stored_state:
3406
pickle.dump((clients, client_settings), stored_state,
3407
protocol=2)
3408
tempname = stored_state.name
3409
os.rename(tempname, stored_state_path)
3410
except (IOError, OSError) as e:
3411
if not debug:
3412
try:
3413
os.remove(tempname)
3414
except NameError:
3415
pass
3416
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
3417
logger.warning("Could not save persistent state: {}"
3418
.format(os.strerror(e.errno)))
3419
else:
3420
logger.warning("Could not save persistent state:",
3421
exc_info=e)
3422
raise
3423
3424
# Delete all clients, and settings from config
2011
service.cleanup()
2012
3425
2013
while tcp_server.clients:
3426
name, client = tcp_server.clients.popitem()
2014
client = tcp_server.clients.pop()
3427
2015
if use_dbus:
3428
2016
client.remove_from_connection()
3429
# Don't signal the disabling
2017
client.disable_hook = None
2018
# Don't signal anything except ClientRemoved
3430
2019
client.disable(quiet=True)
3431
# Emit D-Bus signal for removal
3432
2020
if use_dbus:
3433
mandos_dbus_service.client_removed_signal(client)
3434
client_settings.clear()
3435
2021
# Emit D-Bus signal
2022
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
2023
client.name)
2024
3436
2025
atexit.register(cleanup)
3437
3438
for client in tcp_server.clients.values():
2026
2027
for client in tcp_server.clients:
3439
2028
if use_dbus:
3440
# Emit D-Bus signal for adding
3441
mandos_dbus_service.client_added_signal(client)
3442
# Need to initiate checking of clients
3443
if client.enabled:
3444
client.init_checker()
3445
2029
# Emit D-Bus signal
2030
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2031
client.enable()
2032
3446
2033
tcp_server.enable()
3447
2034
tcp_server.server_activate()
3448
2035
3449
2036
# Find out what port we got
3450
if zeroconf:
3451
service.port = tcp_server.socket.getsockname()[1]
2037
service.port = tcp_server.socket.getsockname()[1]
3452
2038
if use_ipv6:
3453
2039
logger.info("Now listening on address %r, port %d,"
3454
" flowinfo %d, scope_id %d",
3455
*tcp_server.socket.getsockname())
2040
" flowinfo %d, scope_id %d"
2041
% tcp_server.socket.getsockname())
3456
2042
else: # IPv4
3457
logger.info("Now listening on address %r, port %d",
3458
*tcp_server.socket.getsockname())
3459
3460
# service.interface = tcp_server.socket.getsockname()[3]
3461
2043
logger.info("Now listening on address %r, port %d"
2044
% tcp_server.socket.getsockname())
2045
2046
#service.interface = tcp_server.socket.getsockname()[3]
2047
3462
2048
try:
3463
if zeroconf:
3464
# From the Avahi example code
3465
try:
3466
service.activate()
3467
except dbus.exceptions.DBusException as error:
3468
logger.critical("D-Bus Exception", exc_info=error)
3469
cleanup()
3470
sys.exit(1)
3471
# End of Avahi example code
3472
3473
GLib.io_add_watch(tcp_server.fileno(), GLib.IO_IN,
3474
lambda *args, **kwargs:
3475
(tcp_server.handle_request
3476
(*args[2:], **kwargs) or True))
3477
2049
# From the Avahi example code
2050
try:
2051
service.activate()
2052
except dbus.exceptions.DBusException as error:
2053
logger.critical("DBusException: %s", error)
2054
cleanup()
2055
sys.exit(1)
2056
# End of Avahi example code
2057
2058
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2059
lambda *args, **kwargs:
2060
(tcp_server.handle_request
2061
(*args[2:], **kwargs) or True))
2062
3478
2063
logger.debug("Starting main loop")
3479
2064
main_loop.run()
3480
2065
except AvahiError as error:
3481
logger.critical("Avahi Error", exc_info=error)
2066
logger.critical("AvahiError: %s", error)
3482
2067
cleanup()
3483
2068
sys.exit(1)
3484
2069
except KeyboardInterrupt:
3489
2074
# Must run before the D-Bus bus name gets deregistered
3490
2075
cleanup()
3491
2076
3492
3493
2077
if __name__ == '__main__':
3494
2078
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0