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- Committer: Teddy Hogeborn
- Date: 2019-07-14 23:39:53 UTC
- Revision ID: teddy@recompile.se-20190714233953-1zmsd3o062xloazt
Server bug fix: Allow restarts when using port= option
If the Mandos server is configured to use a specific TCP port to
listen to (by using the port= option in mandos.conf or the command
line --port option), that port becomes unusable for a time when the
Mandos server is restarted, making restarts fail. Avoid this by, if a
port number is specified, using SO_REUSEADDR when binding the
listening TCP socket to a port number.
* mandos (IPv6_TCPServer.server_bind): Set self.allow_reuse_address if
a port number is specified.
Reported-by: Juan Miguel Alcarria Herrera <juanmi@arco2000.es>
If the Mandos server is configured to use a specific TCP port to
listen to (by using the port= option in mandos.conf or the command
line --port option), that port becomes unusable for a time when the
Mandos server is restarted, making restarts fail. Avoid this by, if a
port number is specified, using SO_REUSEADDR when binding the
listening TCP socket to a port number.
* mandos (IPv6_TCPServer.server_bind): Set self.allow_reuse_address if
a port number is specified.
Reported-by: Juan Miguel Alcarria Herrera <juanmi@arco2000.es>
- files added:
- bugs.xml
- debian/upstream
- network-hooks.d
- plugin-helpers
- files removed:
- initramfs-tools-hook-conf
- files modified:
- .bzrignore
added
removed
mandos
1
1
#!/usr/bin/python
2
2
# -*- mode: python; coding: utf-8 -*-
3
#
3
#
4
4
# Mandos server - give out binary blobs to connecting clients.
5
#
5
#
6
6
# This program is partly derived from an example program for an Avahi
7
7
# service publisher, downloaded from
8
8
# <http://avahi.org/wiki/PythonPublishExample>. This includes the
9
9
# methods "add", "remove", "server_state_changed",
10
10
# "entry_group_state_changed", "cleanup", and "activate" in the
11
11
# "AvahiService" class, and some lines in "main".
12
#
12
#
13
13
# Everything else is
14
# Copyright © 2008-2011 Teddy Hogeborn
15
# Copyright © 2008-2011 Björn Påhlsson
16
#
17
# This program is free software: you can redistribute it and/or modify
18
# it under the terms of the GNU General Public License as published by
14
# Copyright © 2008-2019 Teddy Hogeborn
15
# Copyright © 2008-2019 Björn Påhlsson
16
#
17
# This file is part of Mandos.
18
#
19
# Mandos is free software: you can redistribute it and/or modify it
20
# under the terms of the GNU General Public License as published by
19
21
# the Free Software Foundation, either version 3 of the License, or
20
22
# (at your option) any later version.
21
23
#
22
# This program is distributed in the hope that it will be useful,
23
# but WITHOUT ANY WARRANTY; without even the implied warranty of
24
# Mandos is distributed in the hope that it will be useful, but
25
# WITHOUT ANY WARRANTY; without even the implied warranty of
24
26
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
25
27
# GNU General Public License for more details.
26
#
28
#
27
29
# You should have received a copy of the GNU General Public License
28
# along with this program. If not, see
29
# <http://www.gnu.org/licenses/>.
30
#
30
# along with Mandos. If not, see <http://www.gnu.org/licenses/>.
31
#
31
32
# Contact the authors at <mandos@recompile.se>.
32
#
33
#
33
34
34
35
from __future__ import (division, absolute_import, print_function,
35
36
unicode_literals)
36
37
37
import SocketServer as socketserver
38
try:
39
from future_builtins import *
40
except ImportError:
41
pass
42
43
try:
44
import SocketServer as socketserver
45
except ImportError:
46
import socketserver
38
47
import socket
39
48
import argparse
40
49
import datetime
41
50
import errno
42
import gnutls.crypto
43
import gnutls.connection
44
import gnutls.errors
45
import gnutls.library.functions
46
import gnutls.library.constants
47
import gnutls.library.types
48
import ConfigParser as configparser
51
try:
52
import ConfigParser as configparser
53
except ImportError:
54
import configparser
49
55
import sys
50
56
import re
51
57
import os
60
66
import struct
61
67
import fcntl
62
68
import functools
63
import cPickle as pickle
69
try:
70
import cPickle as pickle
71
except ImportError:
72
import pickle
64
73
import multiprocessing
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74
import types
75
import binascii
76
import tempfile
77
import itertools
78
import collections
79
import codecs
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import dbus
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import dbus.service
69
import gobject
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import avahi
83
from gi.repository import GLib
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84
from dbus.mainloop.glib import DBusGMainLoop
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import ctypes
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86
import ctypes.util
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import xml.dom.minidom
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import inspect
76
89
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# Try to find the value of SO_BINDTODEVICE:
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try:
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# 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:
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SO_BINDTODEVICE = socket.SO_BINDTODEVICE
79
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except AttributeError:
80
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try:
97
# This is where SO_BINDTODEVICE was up to and including Python
98
# 2.6, and also 3.2:
81
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from IN import SO_BINDTODEVICE
82
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except ImportError:
83
SO_BINDTODEVICE = None
84
85
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version = "1.3.1"
87
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#logger = logging.getLogger('mandos')
89
logger = logging.Logger('mandos')
90
syslogger = (logging.handlers.SysLogHandler
91
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
92
address = str("/dev/log")))
93
syslogger.setFormatter(logging.Formatter
94
('Mandos [%(process)d]: %(levelname)s:'
95
' %(message)s'))
96
logger.addHandler(syslogger)
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98
console = logging.StreamHandler()
99
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
100
' %(levelname)s:'
101
' %(message)s'))
102
logger.addHandler(console)
101
# In Python 2.7 it seems to have been removed entirely.
102
# Try running the C preprocessor:
103
try:
104
cc = subprocess.Popen(["cc", "--language=c", "-E",
105
"/dev/stdin"],
106
stdin=subprocess.PIPE,
107
stdout=subprocess.PIPE)
108
stdout = cc.communicate(
109
"#include <sys/socket.h>\nSO_BINDTODEVICE\n")[0]
110
SO_BINDTODEVICE = int(stdout.splitlines()[-1])
111
except (OSError, ValueError, IndexError):
112
# No value found
113
SO_BINDTODEVICE = None
114
115
if sys.version_info.major == 2:
116
str = unicode
117
118
version = "1.8.4"
119
stored_state_file = "clients.pickle"
120
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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
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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
IF_UNSPEC = -1 # avahi-common/address.h
281
PROTO_UNSPEC = -1 # avahi-common/address.h
282
PROTO_INET = 0 # avahi-common/address.h
283
PROTO_INET6 = 1 # avahi-common/address.h
284
DBUS_NAME = "org.freedesktop.Avahi"
285
DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"
286
DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"
287
DBUS_PATH_SERVER = "/"
288
289
@staticmethod
290
def string_array_to_txt_array(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
103
302
104
303
class AvahiError(Exception):
105
304
def __init__(self, value, *args, **kwargs):
106
305
self.value = value
107
super(AvahiError, self).__init__(value, *args, **kwargs)
108
def __unicode__(self):
109
return unicode(repr(self.value))
306
return super(AvahiError, self).__init__(value, *args,
307
**kwargs)
308
110
309
111
310
class AvahiServiceError(AvahiError):
112
311
pass
113
312
313
114
314
class AvahiGroupError(AvahiError):
115
315
pass
116
316
117
317
118
318
class AvahiService(object):
119
319
"""An Avahi (Zeroconf) service.
120
320
121
321
Attributes:
122
322
interface: integer; avahi.IF_UNSPEC or an interface index.
123
323
Used to optionally bind to the specified interface.
124
324
name: string; Example: 'Mandos'
125
325
type: string; Example: '_mandos._tcp'.
126
See <http://www.dns-sd.org/ServiceTypes.html>
326
See <https://www.iana.org/assignments/service-names-port-numbers>
127
327
port: integer; what port to announce
128
328
TXT: list of strings; TXT record for the service
129
329
domain: string; Domain to publish on, default to .local if empty.
135
335
server: D-Bus Server
136
336
bus: dbus.SystemBus()
137
337
"""
138
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
139
servicetype = None, port = None, TXT = None,
140
domain = "", host = "", max_renames = 32768,
141
protocol = avahi.PROTO_UNSPEC, bus = None):
338
339
def __init__(self,
340
interface=avahi.IF_UNSPEC,
341
name=None,
342
servicetype=None,
343
port=None,
344
TXT=None,
345
domain="",
346
host="",
347
max_renames=32768,
348
protocol=avahi.PROTO_UNSPEC,
349
bus=None):
142
350
self.interface = interface
143
351
self.name = name
144
352
self.type = servicetype
153
361
self.server = None
154
362
self.bus = bus
155
363
self.entry_group_state_changed_match = None
156
def rename(self):
364
365
def rename(self, remove=True):
157
366
"""Derived from the Avahi example code"""
158
367
if self.rename_count >= self.max_renames:
159
368
logger.critical("No suitable Zeroconf service name found"
160
369
" after %i retries, exiting.",
161
370
self.rename_count)
162
371
raise AvahiServiceError("Too many renames")
163
self.name = unicode(self.server.GetAlternativeServiceName(self.name))
372
self.name = str(
373
self.server.GetAlternativeServiceName(self.name))
374
self.rename_count += 1
164
375
logger.info("Changing Zeroconf service name to %r ...",
165
376
self.name)
166
syslogger.setFormatter(logging.Formatter
167
('Mandos (%s) [%%(process)d]:'
168
' %%(levelname)s: %%(message)s'
169
% self.name))
170
self.remove()
377
if remove:
378
self.remove()
171
379
try:
172
380
self.add()
173
381
except dbus.exceptions.DBusException as error:
174
logger.critical("DBusException: %s", error)
175
self.cleanup()
176
os._exit(1)
177
self.rename_count += 1
382
if (error.get_dbus_name()
383
== "org.freedesktop.Avahi.CollisionError"):
384
logger.info("Local Zeroconf service name collision.")
385
return self.rename(remove=False)
386
else:
387
logger.critical("D-Bus Exception", exc_info=error)
388
self.cleanup()
389
os._exit(1)
390
178
391
def remove(self):
179
392
"""Derived from the Avahi example code"""
180
393
if self.entry_group_state_changed_match is not None:
182
395
self.entry_group_state_changed_match = None
183
396
if self.group is not None:
184
397
self.group.Reset()
398
185
399
def add(self):
186
400
"""Derived from the Avahi example code"""
187
401
self.remove()
192
406
avahi.DBUS_INTERFACE_ENTRY_GROUP)
193
407
self.entry_group_state_changed_match = (
194
408
self.group.connect_to_signal(
195
'StateChanged', self .entry_group_state_changed))
409
'StateChanged', self.entry_group_state_changed))
196
410
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
197
411
self.name, self.type)
198
412
self.group.AddService(
204
418
dbus.UInt16(self.port),
205
419
avahi.string_array_to_txt_array(self.TXT))
206
420
self.group.Commit()
421
207
422
def entry_group_state_changed(self, state, error):
208
423
"""Derived from the Avahi example code"""
209
424
logger.debug("Avahi entry group state change: %i", state)
210
425
211
426
if state == avahi.ENTRY_GROUP_ESTABLISHED:
212
427
logger.debug("Zeroconf service established.")
213
428
elif state == avahi.ENTRY_GROUP_COLLISION:
215
430
self.rename()
216
431
elif state == avahi.ENTRY_GROUP_FAILURE:
217
432
logger.critical("Avahi: Error in group state changed %s",
218
unicode(error))
219
raise AvahiGroupError("State changed: %s"
220
% unicode(error))
433
str(error))
434
raise AvahiGroupError("State changed: {!s}".format(error))
435
221
436
def cleanup(self):
222
437
"""Derived from the Avahi example code"""
223
438
if self.group is not None:
224
439
try:
225
440
self.group.Free()
226
441
except (dbus.exceptions.UnknownMethodException,
227
dbus.exceptions.DBusException) as e:
442
dbus.exceptions.DBusException):
228
443
pass
229
444
self.group = None
230
445
self.remove()
446
231
447
def server_state_changed(self, state, error=None):
232
448
"""Derived from the Avahi example code"""
233
449
logger.debug("Avahi server state change: %i", state)
234
bad_states = { avahi.SERVER_INVALID:
235
"Zeroconf server invalid",
236
avahi.SERVER_REGISTERING: None,
237
avahi.SERVER_COLLISION:
238
"Zeroconf server name collision",
239
avahi.SERVER_FAILURE:
240
"Zeroconf server failure" }
450
bad_states = {
451
avahi.SERVER_INVALID: "Zeroconf server invalid",
452
avahi.SERVER_REGISTERING: None,
453
avahi.SERVER_COLLISION: "Zeroconf server name collision",
454
avahi.SERVER_FAILURE: "Zeroconf server failure",
455
}
241
456
if state in bad_states:
242
457
if bad_states[state] is not None:
243
458
if error is None:
246
461
logger.error(bad_states[state] + ": %r", error)
247
462
self.cleanup()
248
463
elif state == avahi.SERVER_RUNNING:
249
self.add()
464
try:
465
self.add()
466
except dbus.exceptions.DBusException as error:
467
if (error.get_dbus_name()
468
== "org.freedesktop.Avahi.CollisionError"):
469
logger.info("Local Zeroconf service name"
470
" collision.")
471
return self.rename(remove=False)
472
else:
473
logger.critical("D-Bus Exception", exc_info=error)
474
self.cleanup()
475
os._exit(1)
250
476
else:
251
477
if error is None:
252
478
logger.debug("Unknown state: %r", state)
253
479
else:
254
480
logger.debug("Unknown state: %r: %r", state, error)
481
255
482
def activate(self):
256
483
"""Derived from the Avahi example code"""
257
484
if self.server is None:
261
488
follow_name_owner_changes=True),
262
489
avahi.DBUS_INTERFACE_SERVER)
263
490
self.server.connect_to_signal("StateChanged",
264
self.server_state_changed)
491
self.server_state_changed)
265
492
self.server_state_changed(self.server.GetState())
266
493
267
494
268
def _timedelta_to_milliseconds(td):
269
"Convert a datetime.timedelta() to milliseconds"
270
return ((td.days * 24 * 60 * 60 * 1000)
271
+ (td.seconds * 1000)
272
+ (td.microseconds // 1000))
273
495
class AvahiServiceToSyslog(AvahiService):
496
def rename(self, *args, **kwargs):
497
"""Add the new name to the syslog messages"""
498
ret = super(AvahiServiceToSyslog, self).rename(*args, **kwargs)
499
syslogger.setFormatter(logging.Formatter(
500
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
501
.format(self.name)))
502
return ret
503
504
505
# Pretend that we have a GnuTLS module
506
class gnutls(object):
507
"""This isn't so much a class as it is a module-like namespace."""
508
509
library = ctypes.util.find_library("gnutls")
510
if library is None:
511
library = ctypes.util.find_library("gnutls-deb0")
512
_library = ctypes.cdll.LoadLibrary(library)
513
del library
514
515
# Unless otherwise indicated, the constants and types below are
516
# all from the gnutls/gnutls.h C header file.
517
518
# Constants
519
E_SUCCESS = 0
520
E_INTERRUPTED = -52
521
E_AGAIN = -28
522
CRT_OPENPGP = 2
523
CRT_RAWPK = 3
524
CLIENT = 2
525
SHUT_RDWR = 0
526
CRD_CERTIFICATE = 1
527
E_NO_CERTIFICATE_FOUND = -49
528
X509_FMT_DER = 0
529
NO_TICKETS = 1<<10
530
ENABLE_RAWPK = 1<<18
531
CTYPE_PEERS = 3
532
KEYID_USE_SHA256 = 1 # gnutls/x509.h
533
OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
534
535
# Types
536
class session_int(ctypes.Structure):
537
_fields_ = []
538
session_t = ctypes.POINTER(session_int)
539
540
class certificate_credentials_st(ctypes.Structure):
541
_fields_ = []
542
certificate_credentials_t = ctypes.POINTER(
543
certificate_credentials_st)
544
certificate_type_t = ctypes.c_int
545
546
class datum_t(ctypes.Structure):
547
_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
548
('size', ctypes.c_uint)]
549
550
class openpgp_crt_int(ctypes.Structure):
551
_fields_ = []
552
openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
553
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
554
log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
555
credentials_type_t = ctypes.c_int
556
transport_ptr_t = ctypes.c_void_p
557
close_request_t = ctypes.c_int
558
559
# Exceptions
560
class Error(Exception):
561
def __init__(self, message=None, code=None, args=()):
562
# Default usage is by a message string, but if a return
563
# code is passed, convert it to a string with
564
# gnutls.strerror()
565
self.code = code
566
if message is None and code is not None:
567
message = gnutls.strerror(code)
568
return super(gnutls.Error, self).__init__(
569
message, *args)
570
571
class CertificateSecurityError(Error):
572
pass
573
574
# Classes
575
class Credentials(object):
576
def __init__(self):
577
self._c_object = gnutls.certificate_credentials_t()
578
gnutls.certificate_allocate_credentials(
579
ctypes.byref(self._c_object))
580
self.type = gnutls.CRD_CERTIFICATE
581
582
def __del__(self):
583
gnutls.certificate_free_credentials(self._c_object)
584
585
class ClientSession(object):
586
def __init__(self, socket, credentials=None):
587
self._c_object = gnutls.session_t()
588
gnutls_flags = gnutls.CLIENT
589
if gnutls.check_version("3.5.6"):
590
gnutls_flags |= gnutls.NO_TICKETS
591
if gnutls.has_rawpk:
592
gnutls_flags |= gnutls.ENABLE_RAWPK
593
gnutls.init(ctypes.byref(self._c_object), gnutls_flags)
594
del gnutls_flags
595
gnutls.set_default_priority(self._c_object)
596
gnutls.transport_set_ptr(self._c_object, socket.fileno())
597
gnutls.handshake_set_private_extensions(self._c_object,
598
True)
599
self.socket = socket
600
if credentials is None:
601
credentials = gnutls.Credentials()
602
gnutls.credentials_set(self._c_object, credentials.type,
603
ctypes.cast(credentials._c_object,
604
ctypes.c_void_p))
605
self.credentials = credentials
606
607
def __del__(self):
608
gnutls.deinit(self._c_object)
609
610
def handshake(self):
611
return gnutls.handshake(self._c_object)
612
613
def send(self, data):
614
data = bytes(data)
615
data_len = len(data)
616
while data_len > 0:
617
data_len -= gnutls.record_send(self._c_object,
618
data[-data_len:],
619
data_len)
620
621
def bye(self):
622
return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
623
624
# Error handling functions
625
def _error_code(result):
626
"""A function to raise exceptions on errors, suitable
627
for the 'restype' attribute on ctypes functions"""
628
if result >= 0:
629
return result
630
if result == gnutls.E_NO_CERTIFICATE_FOUND:
631
raise gnutls.CertificateSecurityError(code=result)
632
raise gnutls.Error(code=result)
633
634
def _retry_on_error(result, func, arguments):
635
"""A function to retry on some errors, suitable
636
for the 'errcheck' attribute on ctypes functions"""
637
while result < 0:
638
if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
639
return _error_code(result)
640
result = func(*arguments)
641
return result
642
643
# Unless otherwise indicated, the function declarations below are
644
# all from the gnutls/gnutls.h C header file.
645
646
# Functions
647
priority_set_direct = _library.gnutls_priority_set_direct
648
priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
649
ctypes.POINTER(ctypes.c_char_p)]
650
priority_set_direct.restype = _error_code
651
652
init = _library.gnutls_init
653
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
654
init.restype = _error_code
655
656
set_default_priority = _library.gnutls_set_default_priority
657
set_default_priority.argtypes = [session_t]
658
set_default_priority.restype = _error_code
659
660
record_send = _library.gnutls_record_send
661
record_send.argtypes = [session_t, ctypes.c_void_p,
662
ctypes.c_size_t]
663
record_send.restype = ctypes.c_ssize_t
664
record_send.errcheck = _retry_on_error
665
666
certificate_allocate_credentials = (
667
_library.gnutls_certificate_allocate_credentials)
668
certificate_allocate_credentials.argtypes = [
669
ctypes.POINTER(certificate_credentials_t)]
670
certificate_allocate_credentials.restype = _error_code
671
672
certificate_free_credentials = (
673
_library.gnutls_certificate_free_credentials)
674
certificate_free_credentials.argtypes = [
675
certificate_credentials_t]
676
certificate_free_credentials.restype = None
677
678
handshake_set_private_extensions = (
679
_library.gnutls_handshake_set_private_extensions)
680
handshake_set_private_extensions.argtypes = [session_t,
681
ctypes.c_int]
682
handshake_set_private_extensions.restype = None
683
684
credentials_set = _library.gnutls_credentials_set
685
credentials_set.argtypes = [session_t, credentials_type_t,
686
ctypes.c_void_p]
687
credentials_set.restype = _error_code
688
689
strerror = _library.gnutls_strerror
690
strerror.argtypes = [ctypes.c_int]
691
strerror.restype = ctypes.c_char_p
692
693
certificate_type_get = _library.gnutls_certificate_type_get
694
certificate_type_get.argtypes = [session_t]
695
certificate_type_get.restype = _error_code
696
697
certificate_get_peers = _library.gnutls_certificate_get_peers
698
certificate_get_peers.argtypes = [session_t,
699
ctypes.POINTER(ctypes.c_uint)]
700
certificate_get_peers.restype = ctypes.POINTER(datum_t)
701
702
global_set_log_level = _library.gnutls_global_set_log_level
703
global_set_log_level.argtypes = [ctypes.c_int]
704
global_set_log_level.restype = None
705
706
global_set_log_function = _library.gnutls_global_set_log_function
707
global_set_log_function.argtypes = [log_func]
708
global_set_log_function.restype = None
709
710
deinit = _library.gnutls_deinit
711
deinit.argtypes = [session_t]
712
deinit.restype = None
713
714
handshake = _library.gnutls_handshake
715
handshake.argtypes = [session_t]
716
handshake.restype = _error_code
717
handshake.errcheck = _retry_on_error
718
719
transport_set_ptr = _library.gnutls_transport_set_ptr
720
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
721
transport_set_ptr.restype = None
722
723
bye = _library.gnutls_bye
724
bye.argtypes = [session_t, close_request_t]
725
bye.restype = _error_code
726
bye.errcheck = _retry_on_error
727
728
check_version = _library.gnutls_check_version
729
check_version.argtypes = [ctypes.c_char_p]
730
check_version.restype = ctypes.c_char_p
731
732
_need_version = b"3.3.0"
733
if check_version(_need_version) is None:
734
raise self.Error("Needs GnuTLS {} or later"
735
.format(_need_version))
736
737
_tls_rawpk_version = b"3.6.6"
738
has_rawpk = bool(check_version(_tls_rawpk_version))
739
740
if has_rawpk:
741
# Types
742
class pubkey_st(ctypes.Structure):
743
_fields = []
744
pubkey_t = ctypes.POINTER(pubkey_st)
745
746
x509_crt_fmt_t = ctypes.c_int
747
748
# All the function declarations below are from gnutls/abstract.h
749
pubkey_init = _library.gnutls_pubkey_init
750
pubkey_init.argtypes = [ctypes.POINTER(pubkey_t)]
751
pubkey_init.restype = _error_code
752
753
pubkey_import = _library.gnutls_pubkey_import
754
pubkey_import.argtypes = [pubkey_t, ctypes.POINTER(datum_t),
755
x509_crt_fmt_t]
756
pubkey_import.restype = _error_code
757
758
pubkey_get_key_id = _library.gnutls_pubkey_get_key_id
759
pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,
760
ctypes.POINTER(ctypes.c_ubyte),
761
ctypes.POINTER(ctypes.c_size_t)]
762
pubkey_get_key_id.restype = _error_code
763
764
pubkey_deinit = _library.gnutls_pubkey_deinit
765
pubkey_deinit.argtypes = [pubkey_t]
766
pubkey_deinit.restype = None
767
else:
768
# All the function declarations below are from gnutls/openpgp.h
769
770
openpgp_crt_init = _library.gnutls_openpgp_crt_init
771
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
772
openpgp_crt_init.restype = _error_code
773
774
openpgp_crt_import = _library.gnutls_openpgp_crt_import
775
openpgp_crt_import.argtypes = [openpgp_crt_t,
776
ctypes.POINTER(datum_t),
777
openpgp_crt_fmt_t]
778
openpgp_crt_import.restype = _error_code
779
780
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
781
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
782
ctypes.POINTER(ctypes.c_uint)]
783
openpgp_crt_verify_self.restype = _error_code
784
785
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
786
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
787
openpgp_crt_deinit.restype = None
788
789
openpgp_crt_get_fingerprint = (
790
_library.gnutls_openpgp_crt_get_fingerprint)
791
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
792
ctypes.c_void_p,
793
ctypes.POINTER(
794
ctypes.c_size_t)]
795
openpgp_crt_get_fingerprint.restype = _error_code
796
797
if check_version("3.6.4"):
798
certificate_type_get2 = _library.gnutls_certificate_type_get2
799
certificate_type_get2.argtypes = [session_t, ctypes.c_int]
800
certificate_type_get2.restype = _error_code
801
802
# Remove non-public functions
803
del _error_code, _retry_on_error
804
805
806
def call_pipe(connection, # : multiprocessing.Connection
807
func, *args, **kwargs):
808
"""This function is meant to be called by multiprocessing.Process
809
810
This function runs func(*args, **kwargs), and writes the resulting
811
return value on the provided multiprocessing.Connection.
812
"""
813
connection.send(func(*args, **kwargs))
814
connection.close()
815
816
274
817
class Client(object):
275
818
"""A representation of a client host served by this server.
276
819
277
820
Attributes:
278
_approved: bool(); 'None' if not yet approved/disapproved
821
approved: bool(); 'None' if not yet approved/disapproved
279
822
approval_delay: datetime.timedelta(); Time to wait for approval
280
823
approval_duration: datetime.timedelta(); Duration of one approval
281
824
checker: subprocess.Popen(); a running checker process used
282
825
to see if the client lives.
283
826
'None' if no process is running.
284
checker_callback_tag: a gobject event source tag, or None
827
checker_callback_tag: a GLib event source tag, or None
285
828
checker_command: string; External command which is run to check
286
829
if client lives. %() expansions are done at
287
830
runtime with vars(self) as dict, so that for
288
831
instance %(name)s can be used in the command.
289
checker_initiator_tag: a gobject event source tag, or None
832
checker_initiator_tag: a GLib event source tag, or None
290
833
created: datetime.datetime(); (UTC) object creation
834
client_structure: Object describing what attributes a client has
835
and is used for storing the client at exit
291
836
current_checker_command: string; current running checker_command
292
disable_hook: If set, called by disable() as disable_hook(self)
293
disable_initiator_tag: a gobject event source tag, or None
837
disable_initiator_tag: a GLib event source tag, or None
294
838
enabled: bool()
295
839
fingerprint: string (40 or 32 hexadecimal digits); used to
296
uniquely identify the client
840
uniquely identify an OpenPGP client
841
key_id: string (64 hexadecimal digits); used to uniquely identify
842
a client using raw public keys
297
843
host: string; available for use by the checker command
298
844
interval: datetime.timedelta(); How often to start a new checker
299
845
last_approval_request: datetime.datetime(); (UTC) or None
300
846
last_checked_ok: datetime.datetime(); (UTC) or None
301
last_enabled: datetime.datetime(); (UTC)
847
last_checker_status: integer between 0 and 255 reflecting exit
848
status of last checker. -1 reflects crashed
849
checker, -2 means no checker completed yet.
850
last_checker_signal: The signal which killed the last checker, if
851
last_checker_status is -1
852
last_enabled: datetime.datetime(); (UTC) or None
302
853
name: string; from the config file, used in log messages and
303
854
D-Bus identifiers
304
855
secret: bytestring; sent verbatim (over TLS) to client
305
856
timeout: datetime.timedelta(); How long from last_checked_ok
306
857
until this client is disabled
307
extended_timeout: extra long timeout when password has been sent
858
extended_timeout: extra long timeout when secret has been sent
308
859
runtime_expansions: Allowed attributes for runtime expansion.
309
860
expires: datetime.datetime(); time (UTC) when a client will be
310
861
disabled, or None
862
server_settings: The server_settings dict from main()
311
863
"""
312
864
313
865
runtime_expansions = ("approval_delay", "approval_duration",
314
"created", "enabled", "fingerprint",
315
"host", "interval", "last_checked_ok",
866
"created", "enabled", "expires", "key_id",
867
"fingerprint", "host", "interval",
868
"last_approval_request", "last_checked_ok",
316
869
"last_enabled", "name", "timeout")
317
318
def timeout_milliseconds(self):
319
"Return the 'timeout' attribute in milliseconds"
320
return _timedelta_to_milliseconds(self.timeout)
321
322
def extended_timeout_milliseconds(self):
323
"Return the 'extended_timeout' attribute in milliseconds"
324
return _timedelta_to_milliseconds(self.extended_timeout)
325
326
def interval_milliseconds(self):
327
"Return the 'interval' attribute in milliseconds"
328
return _timedelta_to_milliseconds(self.interval)
329
330
def approval_delay_milliseconds(self):
331
return _timedelta_to_milliseconds(self.approval_delay)
332
333
def __init__(self, name = None, disable_hook=None, config=None):
334
"""Note: the 'checker' key in 'config' sets the
335
'checker_command' attribute and *not* the 'checker'
336
attribute."""
870
client_defaults = {
871
"timeout": "PT5M",
872
"extended_timeout": "PT15M",
873
"interval": "PT2M",
874
"checker": "fping -q -- %%(host)s",
875
"host": "",
876
"approval_delay": "PT0S",
877
"approval_duration": "PT1S",
878
"approved_by_default": "True",
879
"enabled": "True",
880
}
881
882
@staticmethod
883
def config_parser(config):
884
"""Construct a new dict of client settings of this form:
885
{ client_name: {setting_name: value, ...}, ...}
886
with exceptions for any special settings as defined above.
887
NOTE: Must be a pure function. Must return the same result
888
value given the same arguments.
889
"""
890
settings = {}
891
for client_name in config.sections():
892
section = dict(config.items(client_name))
893
client = settings[client_name] = {}
894
895
client["host"] = section["host"]
896
# Reformat values from string types to Python types
897
client["approved_by_default"] = config.getboolean(
898
client_name, "approved_by_default")
899
client["enabled"] = config.getboolean(client_name,
900
"enabled")
901
902
# Uppercase and remove spaces from key_id and fingerprint
903
# for later comparison purposes with return value from the
904
# key_id() and fingerprint() functions
905
client["key_id"] = (section.get("key_id", "").upper()
906
.replace(" ", ""))
907
client["fingerprint"] = (section["fingerprint"].upper()
908
.replace(" ", ""))
909
if "secret" in section:
910
client["secret"] = codecs.decode(section["secret"]
911
.encode("utf-8"),
912
"base64")
913
elif "secfile" in section:
914
with open(os.path.expanduser(os.path.expandvars
915
(section["secfile"])),
916
"rb") as secfile:
917
client["secret"] = secfile.read()
918
else:
919
raise TypeError("No secret or secfile for section {}"
920
.format(section))
921
client["timeout"] = string_to_delta(section["timeout"])
922
client["extended_timeout"] = string_to_delta(
923
section["extended_timeout"])
924
client["interval"] = string_to_delta(section["interval"])
925
client["approval_delay"] = string_to_delta(
926
section["approval_delay"])
927
client["approval_duration"] = string_to_delta(
928
section["approval_duration"])
929
client["checker_command"] = section["checker"]
930
client["last_approval_request"] = None
931
client["last_checked_ok"] = None
932
client["last_checker_status"] = -2
933
934
return settings
935
936
def __init__(self, settings, name=None, server_settings=None):
337
937
self.name = name
338
if config is None:
339
config = {}
938
if server_settings is None:
939
server_settings = {}
940
self.server_settings = server_settings
941
# adding all client settings
942
for setting, value in settings.items():
943
setattr(self, setting, value)
944
945
if self.enabled:
946
if not hasattr(self, "last_enabled"):
947
self.last_enabled = datetime.datetime.utcnow()
948
if not hasattr(self, "expires"):
949
self.expires = (datetime.datetime.utcnow()
950
+ self.timeout)
951
else:
952
self.last_enabled = None
953
self.expires = None
954
340
955
logger.debug("Creating client %r", self.name)
341
# Uppercase and remove spaces from fingerprint for later
342
# comparison purposes with return value from the fingerprint()
343
# function
344
self.fingerprint = (config["fingerprint"].upper()
345
.replace(" ", ""))
956
logger.debug(" Key ID: %s", self.key_id)
346
957
logger.debug(" Fingerprint: %s", self.fingerprint)
347
if "secret" in config:
348
self.secret = config["secret"].decode("base64")
349
elif "secfile" in config:
350
with open(os.path.expanduser(os.path.expandvars
351
(config["secfile"])),
352
"rb") as secfile:
353
self.secret = secfile.read()
354
else:
355
raise TypeError("No secret or secfile for client %s"
356
% self.name)
357
self.host = config.get("host", "")
358
self.created = datetime.datetime.utcnow()
359
self.enabled = False
360
self.last_approval_request = None
361
self.last_enabled = None
362
self.last_checked_ok = None
363
self.timeout = string_to_delta(config["timeout"])
364
self.extended_timeout = string_to_delta(config["extended_timeout"])
365
self.interval = string_to_delta(config["interval"])
366
self.disable_hook = disable_hook
958
self.created = settings.get("created",
959
datetime.datetime.utcnow())
960
961
# attributes specific for this server instance
367
962
self.checker = None
368
963
self.checker_initiator_tag = None
369
964
self.disable_initiator_tag = None
370
self.expires = None
371
965
self.checker_callback_tag = None
372
self.checker_command = config["checker"]
373
966
self.current_checker_command = None
374
self.last_connect = None
375
self._approved = None
376
self.approved_by_default = config.get("approved_by_default",
377
True)
967
self.approved = None
378
968
self.approvals_pending = 0
379
self.approval_delay = string_to_delta(
380
config["approval_delay"])
381
self.approval_duration = string_to_delta(
382
config["approval_duration"])
383
self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())
384
969
self.changedstate = multiprocessing_manager.Condition(
970
multiprocessing_manager.Lock())
971
self.client_structure = [attr
972
for attr in self.__dict__.keys()
973
if not attr.startswith("_")]
974
self.client_structure.append("client_structure")
975
976
for name, t in inspect.getmembers(
977
type(self), lambda obj: isinstance(obj, property)):
978
if not name.startswith("_"):
979
self.client_structure.append(name)
980
981
# Send notice to process children that client state has changed
385
982
def send_changedstate(self):
386
self.changedstate.acquire()
387
self.changedstate.notify_all()
388
self.changedstate.release()
389
983
with self.changedstate:
984
self.changedstate.notify_all()
985
390
986
def enable(self):
391
987
"""Start this client's checker and timeout hooks"""
392
988
if getattr(self, "enabled", False):
393
989
# Already enabled
394
990
return
395
self.send_changedstate()
396
# Schedule a new checker to be started an 'interval' from now,
397
# and every interval from then on.
398
self.checker_initiator_tag = (gobject.timeout_add
399
(self.interval_milliseconds(),
400
self.start_checker))
401
# Schedule a disable() when 'timeout' has passed
402
991
self.expires = datetime.datetime.utcnow() + self.timeout
403
self.disable_initiator_tag = (gobject.timeout_add
404
(self.timeout_milliseconds(),
405
self.disable))
406
992
self.enabled = True
407
993
self.last_enabled = datetime.datetime.utcnow()
408
# Also start a new checker *right now*.
409
self.start_checker()
410
994
self.init_checker()
995
self.send_changedstate()
996
411
997
def disable(self, quiet=True):
412
998
"""Disable this client."""
413
999
if not getattr(self, "enabled", False):
414
1000
return False
415
1001
if not quiet:
416
self.send_changedstate()
417
if not quiet:
418
1002
logger.info("Disabling client %s", self.name)
419
if getattr(self, "disable_initiator_tag", False):
420
gobject.source_remove(self.disable_initiator_tag)
1003
if getattr(self, "disable_initiator_tag", None) is not None:
1004
GLib.source_remove(self.disable_initiator_tag)
421
1005
self.disable_initiator_tag = None
422
1006
self.expires = None
423
if getattr(self, "checker_initiator_tag", False):
424
gobject.source_remove(self.checker_initiator_tag)
1007
if getattr(self, "checker_initiator_tag", None) is not None:
1008
GLib.source_remove(self.checker_initiator_tag)
425
1009
self.checker_initiator_tag = None
426
1010
self.stop_checker()
427
if self.disable_hook:
428
self.disable_hook(self)
429
1011
self.enabled = False
430
# Do not run this again if called by a gobject.timeout_add
1012
if not quiet:
1013
self.send_changedstate()
1014
# Do not run this again if called by a GLib.timeout_add
431
1015
return False
432
1016
433
1017
def __del__(self):
434
self.disable_hook = None
435
1018
self.disable()
436
437
def checker_callback(self, pid, condition, command):
1019
1020
def init_checker(self):
1021
# Schedule a new checker to be started an 'interval' from now,
1022
# and every interval from then on.
1023
if self.checker_initiator_tag is not None:
1024
GLib.source_remove(self.checker_initiator_tag)
1025
self.checker_initiator_tag = GLib.timeout_add(
1026
int(self.interval.total_seconds() * 1000),
1027
self.start_checker)
1028
# Schedule a disable() when 'timeout' has passed
1029
if self.disable_initiator_tag is not None:
1030
GLib.source_remove(self.disable_initiator_tag)
1031
self.disable_initiator_tag = GLib.timeout_add(
1032
int(self.timeout.total_seconds() * 1000), self.disable)
1033
# Also start a new checker *right now*.
1034
self.start_checker()
1035
1036
def checker_callback(self, source, condition, connection,
1037
command):
438
1038
"""The checker has completed, so take appropriate actions."""
439
1039
self.checker_callback_tag = None
440
1040
self.checker = None
441
if os.WIFEXITED(condition):
442
exitstatus = os.WEXITSTATUS(condition)
443
if exitstatus == 0:
1041
# Read return code from connection (see call_pipe)
1042
returncode = connection.recv()
1043
connection.close()
1044
1045
if returncode >= 0:
1046
self.last_checker_status = returncode
1047
self.last_checker_signal = None
1048
if self.last_checker_status == 0:
444
1049
logger.info("Checker for %(name)s succeeded",
445
1050
vars(self))
446
1051
self.checked_ok()
447
1052
else:
448
logger.info("Checker for %(name)s failed",
449
vars(self))
1053
logger.info("Checker for %(name)s failed", vars(self))
450
1054
else:
1055
self.last_checker_status = -1
1056
self.last_checker_signal = -returncode
451
1057
logger.warning("Checker for %(name)s crashed?",
452
1058
vars(self))
453
454
def checked_ok(self, timeout=None):
455
"""Bump up the timeout for this client.
456
457
This should only be called when the client has been seen,
458
alive and well.
459
"""
1059
return False
1060
1061
def checked_ok(self):
1062
"""Assert that the client has been seen, alive and well."""
1063
self.last_checked_ok = datetime.datetime.utcnow()
1064
self.last_checker_status = 0
1065
self.last_checker_signal = None
1066
self.bump_timeout()
1067
1068
def bump_timeout(self, timeout=None):
1069
"""Bump up the timeout for this client."""
460
1070
if timeout is None:
461
1071
timeout = self.timeout
462
self.last_checked_ok = datetime.datetime.utcnow()
463
gobject.source_remove(self.disable_initiator_tag)
464
self.expires = datetime.datetime.utcnow() + timeout
465
self.disable_initiator_tag = (gobject.timeout_add
466
(_timedelta_to_milliseconds(timeout),
467
self.disable))
468
1072
if self.disable_initiator_tag is not None:
1073
GLib.source_remove(self.disable_initiator_tag)
1074
self.disable_initiator_tag = None
1075
if getattr(self, "enabled", False):
1076
self.disable_initiator_tag = GLib.timeout_add(
1077
int(timeout.total_seconds() * 1000), self.disable)
1078
self.expires = datetime.datetime.utcnow() + timeout
1079
469
1080
def need_approval(self):
470
1081
self.last_approval_request = datetime.datetime.utcnow()
471
1082
472
1083
def start_checker(self):
473
1084
"""Start a new checker subprocess if one is not running.
474
1085
475
1086
If a checker already exists, leave it running and do
476
1087
nothing."""
477
1088
# The reason for not killing a running checker is that if we
478
# did that, then if a checker (for some reason) started
479
# running slowly and taking more than 'interval' time, the
480
# client would inevitably timeout, since no checker would get
481
# a chance to run to completion. If we instead leave running
1089
# did that, and if a checker (for some reason) started running
1090
# slowly and taking more than 'interval' time, then the client
1091
# would inevitably timeout, since no checker would get a
1092
# chance to run to completion. If we instead leave running
482
1093
# checkers alone, the checker would have to take more time
483
1094
# than 'timeout' for the client to be disabled, which is as it
484
1095
# should be.
485
486
# If a checker exists, make sure it is not a zombie
487
try:
488
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
489
except (AttributeError, OSError) as error:
490
if (isinstance(error, OSError)
491
and error.errno != errno.ECHILD):
492
raise error
493
else:
494
if pid:
495
logger.warning("Checker was a zombie")
496
gobject.source_remove(self.checker_callback_tag)
497
self.checker_callback(pid, status,
498
self.current_checker_command)
1096
1097
if self.checker is not None and not self.checker.is_alive():
1098
logger.warning("Checker was not alive; joining")
1099
self.checker.join()
1100
self.checker = None
499
1101
# Start a new checker if needed
500
1102
if self.checker is None:
1103
# Escape attributes for the shell
1104
escaped_attrs = {
1105
attr: re.escape(str(getattr(self, attr)))
1106
for attr in self.runtime_expansions}
501
1107
try:
502
# In case checker_command has exactly one % operator
503
command = self.checker_command % self.host
504
except TypeError:
505
# Escape attributes for the shell
506
escaped_attrs = dict(
507
(attr,
508
re.escape(unicode(str(getattr(self, attr, "")),
509
errors=
510
'replace')))
511
for attr in
512
self.runtime_expansions)
513
514
try:
515
command = self.checker_command % escaped_attrs
516
except TypeError as error:
517
logger.error('Could not format string "%s":'
518
' %s', self.checker_command, error)
519
return True # Try again later
1108
command = self.checker_command % escaped_attrs
1109
except TypeError as error:
1110
logger.error('Could not format string "%s"',
1111
self.checker_command,
1112
exc_info=error)
1113
return True # Try again later
520
1114
self.current_checker_command = command
521
try:
522
logger.info("Starting checker %r for %s",
523
command, self.name)
524
# We don't need to redirect stdout and stderr, since
525
# in normal mode, that is already done by daemon(),
526
# and in debug mode we don't want to. (Stdin is
527
# always replaced by /dev/null.)
528
self.checker = subprocess.Popen(command,
529
close_fds=True,
530
shell=True, cwd="/")
531
self.checker_callback_tag = (gobject.child_watch_add
532
(self.checker.pid,
533
self.checker_callback,
534
data=command))
535
# The checker may have completed before the gobject
536
# watch was added. Check for this.
537
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
538
if pid:
539
gobject.source_remove(self.checker_callback_tag)
540
self.checker_callback(pid, status, command)
541
except OSError as error:
542
logger.error("Failed to start subprocess: %s",
543
error)
544
# Re-run this periodically if run by gobject.timeout_add
1115
logger.info("Starting checker %r for %s", command,
1116
self.name)
1117
# We don't need to redirect stdout and stderr, since
1118
# in normal mode, that is already done by daemon(),
1119
# and in debug mode we don't want to. (Stdin is
1120
# always replaced by /dev/null.)
1121
# The exception is when not debugging but nevertheless
1122
# running in the foreground; use the previously
1123
# created wnull.
1124
popen_args = {"close_fds": True,
1125
"shell": True,
1126
"cwd": "/"}
1127
if (not self.server_settings["debug"]
1128
and self.server_settings["foreground"]):
1129
popen_args.update({"stdout": wnull,
1130
"stderr": wnull})
1131
pipe = multiprocessing.Pipe(duplex=False)
1132
self.checker = multiprocessing.Process(
1133
target=call_pipe,
1134
args=(pipe[1], subprocess.call, command),
1135
kwargs=popen_args)
1136
self.checker.start()
1137
self.checker_callback_tag = GLib.io_add_watch(
1138
pipe[0].fileno(), GLib.IO_IN,
1139
self.checker_callback, pipe[0], command)
1140
# Re-run this periodically if run by GLib.timeout_add
545
1141
return True
546
1142
547
1143
def stop_checker(self):
548
1144
"""Force the checker process, if any, to stop."""
549
1145
if self.checker_callback_tag:
550
gobject.source_remove(self.checker_callback_tag)
1146
GLib.source_remove(self.checker_callback_tag)
551
1147
self.checker_callback_tag = None
552
1148
if getattr(self, "checker", None) is None:
553
1149
return
554
1150
logger.debug("Stopping checker for %(name)s", vars(self))
555
try:
556
os.kill(self.checker.pid, signal.SIGTERM)
557
#time.sleep(0.5)
558
#if self.checker.poll() is None:
559
# os.kill(self.checker.pid, signal.SIGKILL)
560
except OSError as error:
561
if error.errno != errno.ESRCH: # No such process
562
raise
1151
self.checker.terminate()
563
1152
self.checker = None
564
1153
565
1154
566
def dbus_service_property(dbus_interface, signature="v",
567
access="readwrite", byte_arrays=False):
1155
def dbus_service_property(dbus_interface,
1156
signature="v",
1157
access="readwrite",
1158
byte_arrays=False):
568
1159
"""Decorators for marking methods of a DBusObjectWithProperties to
569
1160
become properties on the D-Bus.
570
1161
571
1162
The decorated method will be called with no arguments by "Get"
572
1163
and with one argument by "Set".
573
1164
574
1165
The parameters, where they are supported, are the same as
575
1166
dbus.service.method, except there is only "signature", since the
576
1167
type from Get() and the type sent to Set() is the same.
579
1170
# "Set" method, so we fail early here:
580
1171
if byte_arrays and signature != "ay":
581
1172
raise ValueError("Byte arrays not supported for non-'ay'"
582
" signature %r" % signature)
1173
" signature {!r}".format(signature))
1174
583
1175
def decorator(func):
584
1176
func._dbus_is_property = True
585
1177
func._dbus_interface = dbus_interface
588
1180
func._dbus_name = func.__name__
589
1181
if func._dbus_name.endswith("_dbus_property"):
590
1182
func._dbus_name = func._dbus_name[:-14]
591
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
592
return func
1183
func._dbus_get_args_options = {'byte_arrays': byte_arrays}
1184
return func
1185
1186
return decorator
1187
1188
1189
def dbus_interface_annotations(dbus_interface):
1190
"""Decorator for marking functions returning interface annotations
1191
1192
Usage:
1193
1194
@dbus_interface_annotations("org.example.Interface")
1195
def _foo(self): # Function name does not matter
1196
return {"org.freedesktop.DBus.Deprecated": "true",
1197
"org.freedesktop.DBus.Property.EmitsChangedSignal":
1198
"false"}
1199
"""
1200
1201
def decorator(func):
1202
func._dbus_is_interface = True
1203
func._dbus_interface = dbus_interface
1204
func._dbus_name = dbus_interface
1205
return func
1206
1207
return decorator
1208
1209
1210
def dbus_annotations(annotations):
1211
"""Decorator to annotate D-Bus methods, signals or properties
1212
Usage:
1213
1214
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
1215
"org.freedesktop.DBus.Property."
1216
"EmitsChangedSignal": "false"})
1217
@dbus_service_property("org.example.Interface", signature="b",
1218
access="r")
1219
def Property_dbus_property(self):
1220
return dbus.Boolean(False)
1221
1222
See also the DBusObjectWithAnnotations class.
1223
"""
1224
1225
def decorator(func):
1226
func._dbus_annotations = annotations
1227
return func
1228
593
1229
return decorator
594
1230
595
1231
596
1232
class DBusPropertyException(dbus.exceptions.DBusException):
597
1233
"""A base class for D-Bus property-related exceptions
598
1234
"""
599
def __unicode__(self):
600
return unicode(str(self))
1235
pass
601
1236
602
1237
603
1238
class DBusPropertyAccessException(DBusPropertyException):
612
1247
pass
613
1248
614
1249
615
class DBusObjectWithProperties(dbus.service.Object):
1250
class DBusObjectWithAnnotations(dbus.service.Object):
1251
"""A D-Bus object with annotations.
1252
1253
Classes inheriting from this can use the dbus_annotations
1254
decorator to add annotations to methods or signals.
1255
"""
1256
1257
@staticmethod
1258
def _is_dbus_thing(thing):
1259
"""Returns a function testing if an attribute is a D-Bus thing
1260
1261
If called like _is_dbus_thing("method") it returns a function
1262
suitable for use as predicate to inspect.getmembers().
1263
"""
1264
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
1265
False)
1266
1267
def _get_all_dbus_things(self, thing):
1268
"""Returns a generator of (name, attribute) pairs
1269
"""
1270
return ((getattr(athing.__get__(self), "_dbus_name", name),
1271
athing.__get__(self))
1272
for cls in self.__class__.__mro__
1273
for name, athing in
1274
inspect.getmembers(cls, self._is_dbus_thing(thing)))
1275
1276
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1277
out_signature="s",
1278
path_keyword='object_path',
1279
connection_keyword='connection')
1280
def Introspect(self, object_path, connection):
1281
"""Overloading of standard D-Bus method.
1282
1283
Inserts annotation tags on methods and signals.
1284
"""
1285
xmlstring = dbus.service.Object.Introspect(self, object_path,
1286
connection)
1287
try:
1288
document = xml.dom.minidom.parseString(xmlstring)
1289
1290
for if_tag in document.getElementsByTagName("interface"):
1291
# Add annotation tags
1292
for typ in ("method", "signal"):
1293
for tag in if_tag.getElementsByTagName(typ):
1294
annots = dict()
1295
for name, prop in (self.
1296
_get_all_dbus_things(typ)):
1297
if (name == tag.getAttribute("name")
1298
and prop._dbus_interface
1299
== if_tag.getAttribute("name")):
1300
annots.update(getattr(
1301
prop, "_dbus_annotations", {}))
1302
for name, value in annots.items():
1303
ann_tag = document.createElement(
1304
"annotation")
1305
ann_tag.setAttribute("name", name)
1306
ann_tag.setAttribute("value", value)
1307
tag.appendChild(ann_tag)
1308
# Add interface annotation tags
1309
for annotation, value in dict(
1310
itertools.chain.from_iterable(
1311
annotations().items()
1312
for name, annotations
1313
in self._get_all_dbus_things("interface")
1314
if name == if_tag.getAttribute("name")
1315
)).items():
1316
ann_tag = document.createElement("annotation")
1317
ann_tag.setAttribute("name", annotation)
1318
ann_tag.setAttribute("value", value)
1319
if_tag.appendChild(ann_tag)
1320
# Fix argument name for the Introspect method itself
1321
if (if_tag.getAttribute("name")
1322
== dbus.INTROSPECTABLE_IFACE):
1323
for cn in if_tag.getElementsByTagName("method"):
1324
if cn.getAttribute("name") == "Introspect":
1325
for arg in cn.getElementsByTagName("arg"):
1326
if (arg.getAttribute("direction")
1327
== "out"):
1328
arg.setAttribute("name",
1329
"xml_data")
1330
xmlstring = document.toxml("utf-8")
1331
document.unlink()
1332
except (AttributeError, xml.dom.DOMException,
1333
xml.parsers.expat.ExpatError) as error:
1334
logger.error("Failed to override Introspection method",
1335
exc_info=error)
1336
return xmlstring
1337
1338
1339
class DBusObjectWithProperties(DBusObjectWithAnnotations):
616
1340
"""A D-Bus object with properties.
617
1341
618
1342
Classes inheriting from this can use the dbus_service_property
619
1343
decorator to expose methods as D-Bus properties. It exposes the
620
1344
standard Get(), Set(), and GetAll() methods on the D-Bus.
621
1345
"""
622
623
@staticmethod
624
def _is_dbus_property(obj):
625
return getattr(obj, "_dbus_is_property", False)
626
627
def _get_all_dbus_properties(self):
628
"""Returns a generator of (name, attribute) pairs
629
"""
630
return ((prop.__get__(self)._dbus_name, prop.__get__(self))
631
for cls in self.__class__.__mro__
632
for name, prop in inspect.getmembers(cls, self._is_dbus_property))
633
1346
634
1347
def _get_dbus_property(self, interface_name, property_name):
635
1348
"""Returns a bound method if one exists which is a D-Bus
636
1349
property with the specified name and interface.
637
1350
"""
638
for cls in self.__class__.__mro__:
639
for name, value in inspect.getmembers(cls, self._is_dbus_property):
640
if value._dbus_name == property_name and value._dbus_interface == interface_name:
1351
for cls in self.__class__.__mro__:
1352
for name, value in inspect.getmembers(
1353
cls, self._is_dbus_thing("property")):
1354
if (value._dbus_name == property_name
1355
and value._dbus_interface == interface_name):
641
1356
return value.__get__(self)
642
1357
643
1358
# No such property
644
raise DBusPropertyNotFound(self.dbus_object_path + ":"
645
+ interface_name + "."
646
+ property_name)
647
648
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
1359
raise DBusPropertyNotFound("{}:{}.{}".format(
1360
self.dbus_object_path, interface_name, property_name))
1361
1362
@classmethod
1363
def _get_all_interface_names(cls):
1364
"""Get a sequence of all interfaces supported by an object"""
1365
return (name for name in set(getattr(getattr(x, attr),
1366
"_dbus_interface", None)
1367
for x in (inspect.getmro(cls))
1368
for attr in dir(x))
1369
if name is not None)
1370
1371
@dbus.service.method(dbus.PROPERTIES_IFACE,
1372
in_signature="ss",
649
1373
out_signature="v")
650
1374
def Get(self, interface_name, property_name):
651
1375
"""Standard D-Bus property Get() method, see D-Bus standard.
657
1381
if not hasattr(value, "variant_level"):
658
1382
return value
659
1383
return type(value)(value, variant_level=value.variant_level+1)
660
1384
661
1385
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
662
1386
def Set(self, interface_name, property_name, value):
663
1387
"""Standard D-Bus property Set() method, see D-Bus standard.
669
1393
# The byte_arrays option is not supported yet on
670
1394
# signatures other than "ay".
671
1395
if prop._dbus_signature != "ay":
672
raise ValueError
673
value = dbus.ByteArray(''.join(unichr(byte)
674
for byte in value))
1396
raise ValueError("Byte arrays not supported for non-"
1397
"'ay' signature {!r}"
1398
.format(prop._dbus_signature))
1399
value = dbus.ByteArray(b''.join(chr(byte)
1400
for byte in value))
675
1401
prop(value)
676
677
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
1402
1403
@dbus.service.method(dbus.PROPERTIES_IFACE,
1404
in_signature="s",
678
1405
out_signature="a{sv}")
679
1406
def GetAll(self, interface_name):
680
1407
"""Standard D-Bus property GetAll() method, see D-Bus
681
1408
standard.
682
1409
683
1410
Note: Will not include properties with access="write".
684
1411
"""
685
all = {}
686
for name, prop in self._get_all_dbus_properties():
1412
properties = {}
1413
for name, prop in self._get_all_dbus_things("property"):
687
1414
if (interface_name
688
1415
and interface_name != prop._dbus_interface):
689
1416
# Interface non-empty but did not match
693
1420
continue
694
1421
value = prop()
695
1422
if not hasattr(value, "variant_level"):
696
all[name] = value
1423
properties[name] = value
697
1424
continue
698
all[name] = type(value)(value, variant_level=
699
value.variant_level+1)
700
return dbus.Dictionary(all, signature="sv")
701
1425
properties[name] = type(value)(
1426
value, variant_level=value.variant_level + 1)
1427
return dbus.Dictionary(properties, signature="sv")
1428
1429
@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
1430
def PropertiesChanged(self, interface_name, changed_properties,
1431
invalidated_properties):
1432
"""Standard D-Bus PropertiesChanged() signal, see D-Bus
1433
standard.
1434
"""
1435
pass
1436
702
1437
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
703
1438
out_signature="s",
704
1439
path_keyword='object_path',
705
1440
connection_keyword='connection')
706
1441
def Introspect(self, object_path, connection):
707
"""Standard D-Bus method, overloaded to insert property tags.
1442
"""Overloading of standard D-Bus method.
1443
1444
Inserts property tags and interface annotation tags.
708
1445
"""
709
xmlstring = dbus.service.Object.Introspect(self, object_path,
710
connection)
1446
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1447
object_path,
1448
connection)
711
1449
try:
712
1450
document = xml.dom.minidom.parseString(xmlstring)
1451
713
1452
def make_tag(document, name, prop):
714
1453
e = document.createElement("property")
715
1454
e.setAttribute("name", name)
716
1455
e.setAttribute("type", prop._dbus_signature)
717
1456
e.setAttribute("access", prop._dbus_access)
718
1457
return e
1458
719
1459
for if_tag in document.getElementsByTagName("interface"):
1460
# Add property tags
720
1461
for tag in (make_tag(document, name, prop)
721
1462
for name, prop
722
in self._get_all_dbus_properties()
1463
in self._get_all_dbus_things("property")
723
1464
if prop._dbus_interface
724
1465
== if_tag.getAttribute("name")):
725
1466
if_tag.appendChild(tag)
1467
# Add annotation tags for properties
1468
for tag in if_tag.getElementsByTagName("property"):
1469
annots = dict()
1470
for name, prop in self._get_all_dbus_things(
1471
"property"):
1472
if (name == tag.getAttribute("name")
1473
and prop._dbus_interface
1474
== if_tag.getAttribute("name")):
1475
annots.update(getattr(
1476
prop, "_dbus_annotations", {}))
1477
for name, value in annots.items():
1478
ann_tag = document.createElement(
1479
"annotation")
1480
ann_tag.setAttribute("name", name)
1481
ann_tag.setAttribute("value", value)
1482
tag.appendChild(ann_tag)
726
1483
# Add the names to the return values for the
727
1484
# "org.freedesktop.DBus.Properties" methods
728
1485
if (if_tag.getAttribute("name")
743
1500
except (AttributeError, xml.dom.DOMException,
744
1501
xml.parsers.expat.ExpatError) as error:
745
1502
logger.error("Failed to override Introspection method",
746
error)
747
return xmlstring
748
749
750
def datetime_to_dbus (dt, variant_level=0):
1503
exc_info=error)
1504
return xmlstring
1505
1506
1507
try:
1508
dbus.OBJECT_MANAGER_IFACE
1509
except AttributeError:
1510
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1511
1512
1513
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1514
"""A D-Bus object with an ObjectManager.
1515
1516
Classes inheriting from this exposes the standard
1517
GetManagedObjects call and the InterfacesAdded and
1518
InterfacesRemoved signals on the standard
1519
"org.freedesktop.DBus.ObjectManager" interface.
1520
1521
Note: No signals are sent automatically; they must be sent
1522
manually.
1523
"""
1524
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1525
out_signature="a{oa{sa{sv}}}")
1526
def GetManagedObjects(self):
1527
"""This function must be overridden"""
1528
raise NotImplementedError()
1529
1530
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1531
signature="oa{sa{sv}}")
1532
def InterfacesAdded(self, object_path, interfaces_and_properties):
1533
pass
1534
1535
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1536
def InterfacesRemoved(self, object_path, interfaces):
1537
pass
1538
1539
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1540
out_signature="s",
1541
path_keyword='object_path',
1542
connection_keyword='connection')
1543
def Introspect(self, object_path, connection):
1544
"""Overloading of standard D-Bus method.
1545
1546
Override return argument name of GetManagedObjects to be
1547
"objpath_interfaces_and_properties"
1548
"""
1549
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1550
object_path,
1551
connection)
1552
try:
1553
document = xml.dom.minidom.parseString(xmlstring)
1554
1555
for if_tag in document.getElementsByTagName("interface"):
1556
# Fix argument name for the GetManagedObjects method
1557
if (if_tag.getAttribute("name")
1558
== dbus.OBJECT_MANAGER_IFACE):
1559
for cn in if_tag.getElementsByTagName("method"):
1560
if (cn.getAttribute("name")
1561
== "GetManagedObjects"):
1562
for arg in cn.getElementsByTagName("arg"):
1563
if (arg.getAttribute("direction")
1564
== "out"):
1565
arg.setAttribute(
1566
"name",
1567
"objpath_interfaces"
1568
"_and_properties")
1569
xmlstring = document.toxml("utf-8")
1570
document.unlink()
1571
except (AttributeError, xml.dom.DOMException,
1572
xml.parsers.expat.ExpatError) as error:
1573
logger.error("Failed to override Introspection method",
1574
exc_info=error)
1575
return xmlstring
1576
1577
1578
def datetime_to_dbus(dt, variant_level=0):
751
1579
"""Convert a UTC datetime.datetime() to a D-Bus type."""
752
1580
if dt is None:
753
return dbus.String("", variant_level = variant_level)
754
return dbus.String(dt.isoformat(),
755
variant_level=variant_level)
756
757
class AlternateDBusNamesMetaclass(DBusObjectWithProperties.__metaclass__):
758
"""Applied to an empty subclass of a D-Bus object, this metaclass
759
will add additional D-Bus attributes matching a certain pattern.
1581
return dbus.String("", variant_level=variant_level)
1582
return dbus.String(dt.isoformat(), variant_level=variant_level)
1583
1584
1585
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1586
"""A class decorator; applied to a subclass of
1587
dbus.service.Object, it will add alternate D-Bus attributes with
1588
interface names according to the "alt_interface_names" mapping.
1589
Usage:
1590
1591
@alternate_dbus_interfaces({"org.example.Interface":
1592
"net.example.AlternateInterface"})
1593
class SampleDBusObject(dbus.service.Object):
1594
@dbus.service.method("org.example.Interface")
1595
def SampleDBusMethod():
1596
pass
1597
1598
The above "SampleDBusMethod" on "SampleDBusObject" will be
1599
reachable via two interfaces: "org.example.Interface" and
1600
"net.example.AlternateInterface", the latter of which will have
1601
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1602
"true", unless "deprecate" is passed with a False value.
1603
1604
This works for methods and signals, and also for D-Bus properties
1605
(from DBusObjectWithProperties) and interfaces (from the
1606
dbus_interface_annotations decorator).
760
1607
"""
761
def __new__(mcs, name, bases, attr):
762
# Go through all the base classes which could have D-Bus
763
# methods, signals, or properties in them
764
for base in (b for b in bases
765
if issubclass(b, dbus.service.Object)):
766
# Go though all attributes of the base class
767
for attrname, attribute in inspect.getmembers(base):
1608
1609
def wrapper(cls):
1610
for orig_interface_name, alt_interface_name in (
1611
alt_interface_names.items()):
1612
attr = {}
1613
interface_names = set()
1614
# Go though all attributes of the class
1615
for attrname, attribute in inspect.getmembers(cls):
768
1616
# Ignore non-D-Bus attributes, and D-Bus attributes
769
1617
# with the wrong interface name
770
1618
if (not hasattr(attribute, "_dbus_interface")
771
or not attribute._dbus_interface
772
.startswith("se.recompile.Mandos")):
1619
or not attribute._dbus_interface.startswith(
1620
orig_interface_name)):
773
1621
continue
774
1622
# Create an alternate D-Bus interface name based on
775
1623
# the current name
776
alt_interface = (attribute._dbus_interface
777
.replace("se.recompile.Mandos",
778
"se.bsnet.fukt.Mandos"))
1624
alt_interface = attribute._dbus_interface.replace(
1625
orig_interface_name, alt_interface_name)
1626
interface_names.add(alt_interface)
779
1627
# Is this a D-Bus signal?
780
1628
if getattr(attribute, "_dbus_is_signal", False):
781
# Extract the original non-method function by
782
# black magic
783
nonmethod_func = (dict(
1629
# Extract the original non-method undecorated
1630
# function by black magic
1631
if sys.version_info.major == 2:
1632
nonmethod_func = (dict(
784
1633
zip(attribute.func_code.co_freevars,
785
attribute.__closure__))["func"]
786
.cell_contents)
1634
attribute.__closure__))
1635
["func"].cell_contents)
1636
else:
1637
nonmethod_func = (dict(
1638
zip(attribute.__code__.co_freevars,
1639
attribute.__closure__))
1640
["func"].cell_contents)
787
1641
# Create a new, but exactly alike, function
788
1642
# object, and decorate it to be a new D-Bus signal
789
1643
# with the alternate D-Bus interface name
790
new_function = (dbus.service.signal
791
(alt_interface,
792
attribute._dbus_signature)
793
(types.FunctionType(
794
nonmethod_func.func_code,
795
nonmethod_func.func_globals,
796
nonmethod_func.func_name,
797
nonmethod_func.func_defaults,
798
nonmethod_func.func_closure)))
1644
new_function = copy_function(nonmethod_func)
1645
new_function = (dbus.service.signal(
1646
alt_interface,
1647
attribute._dbus_signature)(new_function))
1648
# Copy annotations, if any
1649
try:
1650
new_function._dbus_annotations = dict(
1651
attribute._dbus_annotations)
1652
except AttributeError:
1653
pass
1654
799
1655
# Define a creator of a function to call both the
800
# old and new functions, so both the old and new
801
# signals gets sent when the function is called
1656
# original and alternate functions, so both the
1657
# original and alternate signals gets sent when
1658
# the function is called
802
1659
def fixscope(func1, func2):
803
1660
"""This function is a scope container to pass
804
1661
func1 and func2 to the "call_both" function
805
1662
outside of its arguments"""
1663
1664
@functools.wraps(func2)
806
1665
def call_both(*args, **kwargs):
807
1666
"""This function will emit two D-Bus
808
1667
signals by calling func1 and func2"""
809
1668
func1(*args, **kwargs)
810
1669
func2(*args, **kwargs)
1670
# Make wrapper function look like a D-Bus
1671
# signal
1672
for name, attr in inspect.getmembers(func2):
1673
if name.startswith("_dbus_"):
1674
setattr(call_both, name, attr)
1675
811
1676
return call_both
812
1677
# Create the "call_both" function and add it to
813
1678
# the class
814
attr[attrname] = fixscope(attribute,
815
new_function)
1679
attr[attrname] = fixscope(attribute, new_function)
816
1680
# Is this a D-Bus method?
817
1681
elif getattr(attribute, "_dbus_is_method", False):
818
1682
# Create a new, but exactly alike, function
819
1683
# object. Decorate it to be a new D-Bus method
820
1684
# with the alternate D-Bus interface name. Add it
821
1685
# to the class.
822
attr[attrname] = (dbus.service.method
823
(alt_interface,
824
attribute._dbus_in_signature,
825
attribute._dbus_out_signature)
826
(types.FunctionType
827
(attribute.func_code,
828
attribute.func_globals,
829
attribute.func_name,
830
attribute.func_defaults,
831
attribute.func_closure)))
1686
attr[attrname] = (
1687
dbus.service.method(
1688
alt_interface,
1689
attribute._dbus_in_signature,
1690
attribute._dbus_out_signature)
1691
(copy_function(attribute)))
1692
# Copy annotations, if any
1693
try:
1694
attr[attrname]._dbus_annotations = dict(
1695
attribute._dbus_annotations)
1696
except AttributeError:
1697
pass
832
1698
# Is this a D-Bus property?
833
1699
elif getattr(attribute, "_dbus_is_property", False):
834
1700
# Create a new, but exactly alike, function
835
1701
# object, and decorate it to be a new D-Bus
836
1702
# property with the alternate D-Bus interface
837
1703
# name. Add it to the class.
838
attr[attrname] = (dbus_service_property
839
(alt_interface,
840
attribute._dbus_signature,
841
attribute._dbus_access,
842
attribute
843
._dbus_get_args_options
844
["byte_arrays"])
845
(types.FunctionType
846
(attribute.func_code,
847
attribute.func_globals,
848
attribute.func_name,
849
attribute.func_defaults,
850
attribute.func_closure)))
851
return type.__new__(mcs, name, bases, attr)
852
1704
attr[attrname] = (dbus_service_property(
1705
alt_interface, attribute._dbus_signature,
1706
attribute._dbus_access,
1707
attribute._dbus_get_args_options
1708
["byte_arrays"])
1709
(copy_function(attribute)))
1710
# Copy annotations, if any
1711
try:
1712
attr[attrname]._dbus_annotations = dict(
1713
attribute._dbus_annotations)
1714
except AttributeError:
1715
pass
1716
# Is this a D-Bus interface?
1717
elif getattr(attribute, "_dbus_is_interface", False):
1718
# Create a new, but exactly alike, function
1719
# object. Decorate it to be a new D-Bus interface
1720
# with the alternate D-Bus interface name. Add it
1721
# to the class.
1722
attr[attrname] = (
1723
dbus_interface_annotations(alt_interface)
1724
(copy_function(attribute)))
1725
if deprecate:
1726
# Deprecate all alternate interfaces
1727
iname = "_AlternateDBusNames_interface_annotation{}"
1728
for interface_name in interface_names:
1729
1730
@dbus_interface_annotations(interface_name)
1731
def func(self):
1732
return {"org.freedesktop.DBus.Deprecated":
1733
"true"}
1734
# Find an unused name
1735
for aname in (iname.format(i)
1736
for i in itertools.count()):
1737
if aname not in attr:
1738
attr[aname] = func
1739
break
1740
if interface_names:
1741
# Replace the class with a new subclass of it with
1742
# methods, signals, etc. as created above.
1743
if sys.version_info.major == 2:
1744
cls = type(b"{}Alternate".format(cls.__name__),
1745
(cls, ), attr)
1746
else:
1747
cls = type("{}Alternate".format(cls.__name__),
1748
(cls, ), attr)
1749
return cls
1750
1751
return wrapper
1752
1753
1754
@alternate_dbus_interfaces({"se.recompile.Mandos":
1755
"se.bsnet.fukt.Mandos"})
853
1756
class ClientDBus(Client, DBusObjectWithProperties):
854
1757
"""A Client class using D-Bus
855
1758
856
1759
Attributes:
857
1760
dbus_object_path: dbus.ObjectPath
858
1761
bus: dbus.SystemBus()
859
1762
"""
860
1763
861
1764
runtime_expansions = (Client.runtime_expansions
862
+ ("dbus_object_path",))
863
1765
+ ("dbus_object_path", ))
1766
1767
_interface = "se.recompile.Mandos.Client"
1768
864
1769
# dbus.service.Object doesn't use super(), so we can't either.
865
866
def __init__(self, bus = None, *args, **kwargs):
867
self._approvals_pending = 0
1770
1771
def __init__(self, bus=None, *args, **kwargs):
868
1772
self.bus = bus
869
1773
Client.__init__(self, *args, **kwargs)
870
1774
# Only now, when this client is initialized, can it show up on
871
1775
# the D-Bus
872
client_object_name = unicode(self.name).translate(
1776
client_object_name = str(self.name).translate(
873
1777
{ord("."): ord("_"),
874
1778
ord("-"): ord("_")})
875
self.dbus_object_path = (dbus.ObjectPath
876
("/clients/" + client_object_name))
1779
self.dbus_object_path = dbus.ObjectPath(
1780
"/clients/" + client_object_name)
877
1781
DBusObjectWithProperties.__init__(self, self.bus,
878
1782
self.dbus_object_path)
879
880
def notifychangeproperty(transform_func,
881
dbus_name, type_func=lambda x: x,
882
variant_level=1):
1783
1784
def notifychangeproperty(transform_func, dbus_name,
1785
type_func=lambda x: x,
1786
variant_level=1,
1787
invalidate_only=False,
1788
_interface=_interface):
883
1789
""" Modify a variable so that it's a property which announces
884
1790
its changes to DBus.
885
1791
886
transform_fun: Function that takes a value and transforms it
887
to a D-Bus type.
1792
transform_fun: Function that takes a value and a variant_level
1793
and transforms it to a D-Bus type.
888
1794
dbus_name: D-Bus name of the variable
889
1795
type_func: Function that transform the value before sending it
890
1796
to the D-Bus. Default: no transform
891
1797
variant_level: D-Bus variant level. Default: 1
892
1798
"""
893
real_value = [None,]
1799
attrname = "_{}".format(dbus_name)
1800
894
1801
def setter(self, value):
895
old_value = real_value[0]
896
real_value[0] = value
897
1802
if hasattr(self, "dbus_object_path"):
898
if type_func(old_value) != type_func(real_value[0]):
899
dbus_value = transform_func(type_func(real_value[0]),
900
variant_level)
901
self.PropertyChanged(dbus.String(dbus_name),
902
dbus_value)
903
904
return property(lambda self: real_value[0], setter)
905
906
1803
if (not hasattr(self, attrname) or
1804
type_func(getattr(self, attrname, None))
1805
!= type_func(value)):
1806
if invalidate_only:
1807
self.PropertiesChanged(
1808
_interface, dbus.Dictionary(),
1809
dbus.Array((dbus_name, )))
1810
else:
1811
dbus_value = transform_func(
1812
type_func(value),
1813
variant_level=variant_level)
1814
self.PropertyChanged(dbus.String(dbus_name),
1815
dbus_value)
1816
self.PropertiesChanged(
1817
_interface,
1818
dbus.Dictionary({dbus.String(dbus_name):
1819
dbus_value}),
1820
dbus.Array())
1821
setattr(self, attrname, value)
1822
1823
return property(lambda self: getattr(self, attrname), setter)
1824
907
1825
expires = notifychangeproperty(datetime_to_dbus, "Expires")
908
1826
approvals_pending = notifychangeproperty(dbus.Boolean,
909
1827
"ApprovalPending",
910
type_func = bool)
1828
type_func=bool)
911
1829
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
912
1830
last_enabled = notifychangeproperty(datetime_to_dbus,
913
1831
"LastEnabled")
914
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
915
type_func = lambda checker: checker is not None)
1832
checker = notifychangeproperty(
1833
dbus.Boolean, "CheckerRunning",
1834
type_func=lambda checker: checker is not None)
916
1835
last_checked_ok = notifychangeproperty(datetime_to_dbus,
917
1836
"LastCheckedOK")
918
last_approval_request = notifychangeproperty(datetime_to_dbus,
919
"LastApprovalRequest")
1837
last_checker_status = notifychangeproperty(dbus.Int16,
1838
"LastCheckerStatus")
1839
last_approval_request = notifychangeproperty(
1840
datetime_to_dbus, "LastApprovalRequest")
920
1841
approved_by_default = notifychangeproperty(dbus.Boolean,
921
1842
"ApprovedByDefault")
922
approval_delay = notifychangeproperty(dbus.UInt16, "ApprovalDelay",
923
type_func = _timedelta_to_milliseconds)
924
approval_duration = notifychangeproperty(dbus.UInt16, "ApprovalDuration",
925
type_func = _timedelta_to_milliseconds)
1843
approval_delay = notifychangeproperty(
1844
dbus.UInt64, "ApprovalDelay",
1845
type_func=lambda td: td.total_seconds() * 1000)
1846
approval_duration = notifychangeproperty(
1847
dbus.UInt64, "ApprovalDuration",
1848
type_func=lambda td: td.total_seconds() * 1000)
926
1849
host = notifychangeproperty(dbus.String, "Host")
927
timeout = notifychangeproperty(dbus.UInt16, "Timeout",
928
type_func = _timedelta_to_milliseconds)
929
extended_timeout = notifychangeproperty(dbus.UInt16, "ExtendedTimeout",
930
type_func = _timedelta_to_milliseconds)
931
interval = notifychangeproperty(dbus.UInt16, "Interval",
932
type_func = _timedelta_to_milliseconds)
1850
timeout = notifychangeproperty(
1851
dbus.UInt64, "Timeout",
1852
type_func=lambda td: td.total_seconds() * 1000)
1853
extended_timeout = notifychangeproperty(
1854
dbus.UInt64, "ExtendedTimeout",
1855
type_func=lambda td: td.total_seconds() * 1000)
1856
interval = notifychangeproperty(
1857
dbus.UInt64, "Interval",
1858
type_func=lambda td: td.total_seconds() * 1000)
933
1859
checker_command = notifychangeproperty(dbus.String, "Checker")
934
1860
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1861
invalidate_only=True)
1862
935
1863
del notifychangeproperty
936
1864
937
1865
def __del__(self, *args, **kwargs):
938
1866
try:
939
1867
self.remove_from_connection()
942
1870
if hasattr(DBusObjectWithProperties, "__del__"):
943
1871
DBusObjectWithProperties.__del__(self, *args, **kwargs)
944
1872
Client.__del__(self, *args, **kwargs)
945
946
def checker_callback(self, pid, condition, command,
947
*args, **kwargs):
948
self.checker_callback_tag = None
949
self.checker = None
950
if os.WIFEXITED(condition):
951
exitstatus = os.WEXITSTATUS(condition)
1873
1874
def checker_callback(self, source, condition,
1875
connection, command, *args, **kwargs):
1876
ret = Client.checker_callback(self, source, condition,
1877
connection, command, *args,
1878
**kwargs)
1879
exitstatus = self.last_checker_status
1880
if exitstatus >= 0:
952
1881
# Emit D-Bus signal
953
1882
self.CheckerCompleted(dbus.Int16(exitstatus),
954
dbus.Int64(condition),
1883
# This is specific to GNU libC
1884
dbus.Int64(exitstatus << 8),
955
1885
dbus.String(command))
956
1886
else:
957
1887
# Emit D-Bus signal
958
1888
self.CheckerCompleted(dbus.Int16(-1),
959
dbus.Int64(condition),
1889
dbus.Int64(
1890
# This is specific to GNU libC
1891
(exitstatus << 8)
1892
| self.last_checker_signal),
960
1893
dbus.String(command))
961
962
return Client.checker_callback(self, pid, condition, command,
963
*args, **kwargs)
964
1894
return ret
1895
965
1896
def start_checker(self, *args, **kwargs):
966
old_checker = self.checker
967
if self.checker is not None:
968
old_checker_pid = self.checker.pid
969
else:
970
old_checker_pid = None
1897
old_checker_pid = getattr(self.checker, "pid", None)
971
1898
r = Client.start_checker(self, *args, **kwargs)
972
1899
# Only if new checker process was started
973
1900
if (self.checker is not None
975
1902
# Emit D-Bus signal
976
1903
self.CheckerStarted(self.current_checker_command)
977
1904
return r
978
1905
979
1906
def _reset_approved(self):
980
self._approved = None
1907
self.approved = None
981
1908
return False
982
1909
983
1910
def approve(self, value=True):
1911
self.approved = value
1912
GLib.timeout_add(int(self.approval_duration.total_seconds()
1913
* 1000), self._reset_approved)
984
1914
self.send_changedstate()
985
self._approved = value
986
gobject.timeout_add(_timedelta_to_milliseconds
987
(self.approval_duration),
988
self._reset_approved)
989
990
991
## D-Bus methods, signals & properties
992
_interface = "se.recompile.Mandos.Client"
993
994
## Signals
995
1915
1916
# D-Bus methods, signals & properties
1917
1918
# Interfaces
1919
1920
# Signals
1921
996
1922
# CheckerCompleted - signal
997
1923
@dbus.service.signal(_interface, signature="nxs")
998
1924
def CheckerCompleted(self, exitcode, waitstatus, command):
999
1925
"D-Bus signal"
1000
1926
pass
1001
1927
1002
1928
# CheckerStarted - signal
1003
1929
@dbus.service.signal(_interface, signature="s")
1004
1930
def CheckerStarted(self, command):
1005
1931
"D-Bus signal"
1006
1932
pass
1007
1933
1008
1934
# PropertyChanged - signal
1935
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1009
1936
@dbus.service.signal(_interface, signature="sv")
1010
1937
def PropertyChanged(self, property, value):
1011
1938
"D-Bus signal"
1012
1939
pass
1013
1940
1014
1941
# GotSecret - signal
1015
1942
@dbus.service.signal(_interface)
1016
1943
def GotSecret(self):
1019
1946
server to mandos-client
1020
1947
"""
1021
1948
pass
1022
1949
1023
1950
# Rejected - signal
1024
1951
@dbus.service.signal(_interface, signature="s")
1025
1952
def Rejected(self, reason):
1026
1953
"D-Bus signal"
1027
1954
pass
1028
1955
1029
1956
# NeedApproval - signal
1030
1957
@dbus.service.signal(_interface, signature="tb")
1031
1958
def NeedApproval(self, timeout, default):
1032
1959
"D-Bus signal"
1033
1960
return self.need_approval()
1034
1035
## Methods
1036
1961
1962
# Methods
1963
1037
1964
# Approve - method
1038
1965
@dbus.service.method(_interface, in_signature="b")
1039
1966
def Approve(self, value):
1040
1967
self.approve(value)
1041
1968
1042
1969
# CheckedOK - method
1043
1970
@dbus.service.method(_interface)
1044
1971
def CheckedOK(self):
1045
1972
self.checked_ok()
1046
1973
1047
1974
# Enable - method
1975
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1048
1976
@dbus.service.method(_interface)
1049
1977
def Enable(self):
1050
1978
"D-Bus method"
1051
1979
self.enable()
1052
1980
1053
1981
# StartChecker - method
1982
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1054
1983
@dbus.service.method(_interface)
1055
1984
def StartChecker(self):
1056
1985
"D-Bus method"
1057
1986
self.start_checker()
1058
1987
1059
1988
# Disable - method
1989
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1060
1990
@dbus.service.method(_interface)
1061
1991
def Disable(self):
1062
1992
"D-Bus method"
1063
1993
self.disable()
1064
1994
1065
1995
# StopChecker - method
1996
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1066
1997
@dbus.service.method(_interface)
1067
1998
def StopChecker(self):
1068
1999
self.stop_checker()
1069
1070
## Properties
1071
2000
2001
# Properties
2002
1072
2003
# ApprovalPending - property
1073
2004
@dbus_service_property(_interface, signature="b", access="read")
1074
2005
def ApprovalPending_dbus_property(self):
1075
2006
return dbus.Boolean(bool(self.approvals_pending))
1076
2007
1077
2008
# ApprovedByDefault - property
1078
@dbus_service_property(_interface, signature="b",
2009
@dbus_service_property(_interface,
2010
signature="b",
1079
2011
access="readwrite")
1080
2012
def ApprovedByDefault_dbus_property(self, value=None):
1081
2013
if value is None: # get
1082
2014
return dbus.Boolean(self.approved_by_default)
1083
2015
self.approved_by_default = bool(value)
1084
2016
1085
2017
# ApprovalDelay - property
1086
@dbus_service_property(_interface, signature="t",
2018
@dbus_service_property(_interface,
2019
signature="t",
1087
2020
access="readwrite")
1088
2021
def ApprovalDelay_dbus_property(self, value=None):
1089
2022
if value is None: # get
1090
return dbus.UInt64(self.approval_delay_milliseconds())
2023
return dbus.UInt64(self.approval_delay.total_seconds()
2024
* 1000)
1091
2025
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1092
2026
1093
2027
# ApprovalDuration - property
1094
@dbus_service_property(_interface, signature="t",
2028
@dbus_service_property(_interface,
2029
signature="t",
1095
2030
access="readwrite")
1096
2031
def ApprovalDuration_dbus_property(self, value=None):
1097
2032
if value is None: # get
1098
return dbus.UInt64(_timedelta_to_milliseconds(
1099
self.approval_duration))
2033
return dbus.UInt64(self.approval_duration.total_seconds()
2034
* 1000)
1100
2035
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1101
2036
1102
2037
# Name - property
2038
@dbus_annotations(
2039
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1103
2040
@dbus_service_property(_interface, signature="s", access="read")
1104
2041
def Name_dbus_property(self):
1105
2042
return dbus.String(self.name)
1106
2043
2044
# KeyID - property
2045
@dbus_annotations(
2046
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2047
@dbus_service_property(_interface, signature="s", access="read")
2048
def KeyID_dbus_property(self):
2049
return dbus.String(self.key_id)
2050
1107
2051
# Fingerprint - property
2052
@dbus_annotations(
2053
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1108
2054
@dbus_service_property(_interface, signature="s", access="read")
1109
2055
def Fingerprint_dbus_property(self):
1110
2056
return dbus.String(self.fingerprint)
1111
2057
1112
2058
# Host - property
1113
@dbus_service_property(_interface, signature="s",
2059
@dbus_service_property(_interface,
2060
signature="s",
1114
2061
access="readwrite")
1115
2062
def Host_dbus_property(self, value=None):
1116
2063
if value is None: # get
1117
2064
return dbus.String(self.host)
1118
self.host = value
1119
2065
self.host = str(value)
2066
1120
2067
# Created - property
2068
@dbus_annotations(
2069
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1121
2070
@dbus_service_property(_interface, signature="s", access="read")
1122
2071
def Created_dbus_property(self):
1123
return dbus.String(datetime_to_dbus(self.created))
1124
2072
return datetime_to_dbus(self.created)
2073
1125
2074
# LastEnabled - property
1126
2075
@dbus_service_property(_interface, signature="s", access="read")
1127
2076
def LastEnabled_dbus_property(self):
1128
2077
return datetime_to_dbus(self.last_enabled)
1129
2078
1130
2079
# Enabled - property
1131
@dbus_service_property(_interface, signature="b",
2080
@dbus_service_property(_interface,
2081
signature="b",
1132
2082
access="readwrite")
1133
2083
def Enabled_dbus_property(self, value=None):
1134
2084
if value is None: # get
1137
2087
self.enable()
1138
2088
else:
1139
2089
self.disable()
1140
2090
1141
2091
# LastCheckedOK - property
1142
@dbus_service_property(_interface, signature="s",
2092
@dbus_service_property(_interface,
2093
signature="s",
1143
2094
access="readwrite")
1144
2095
def LastCheckedOK_dbus_property(self, value=None):
1145
2096
if value is not None:
1146
2097
self.checked_ok()
1147
2098
return
1148
2099
return datetime_to_dbus(self.last_checked_ok)
1149
2100
2101
# LastCheckerStatus - property
2102
@dbus_service_property(_interface, signature="n", access="read")
2103
def LastCheckerStatus_dbus_property(self):
2104
return dbus.Int16(self.last_checker_status)
2105
1150
2106
# Expires - property
1151
2107
@dbus_service_property(_interface, signature="s", access="read")
1152
2108
def Expires_dbus_property(self):
1153
2109
return datetime_to_dbus(self.expires)
1154
2110
1155
2111
# LastApprovalRequest - property
1156
2112
@dbus_service_property(_interface, signature="s", access="read")
1157
2113
def LastApprovalRequest_dbus_property(self):
1158
2114
return datetime_to_dbus(self.last_approval_request)
1159
2115
1160
2116
# Timeout - property
1161
@dbus_service_property(_interface, signature="t",
2117
@dbus_service_property(_interface,
2118
signature="t",
1162
2119
access="readwrite")
1163
2120
def Timeout_dbus_property(self, value=None):
1164
2121
if value is None: # get
1165
return dbus.UInt64(self.timeout_milliseconds())
2122
return dbus.UInt64(self.timeout.total_seconds() * 1000)
2123
old_timeout = self.timeout
1166
2124
self.timeout = datetime.timedelta(0, 0, 0, value)
1167
if getattr(self, "disable_initiator_tag", None) is None:
1168
return
1169
# Reschedule timeout
1170
gobject.source_remove(self.disable_initiator_tag)
1171
self.disable_initiator_tag = None
1172
self.expires = None
1173
time_to_die = (self.
1174
_timedelta_to_milliseconds((self
1175
.last_checked_ok
1176
+ self.timeout)
1177
- datetime.datetime
1178
.utcnow()))
1179
if time_to_die <= 0:
1180
# The timeout has passed
1181
self.disable()
1182
else:
1183
self.expires = (datetime.datetime.utcnow()
1184
+ datetime.timedelta(milliseconds = time_to_die))
1185
self.disable_initiator_tag = (gobject.timeout_add
1186
(time_to_die, self.disable))
1187
2125
# Reschedule disabling
2126
if self.enabled:
2127
now = datetime.datetime.utcnow()
2128
self.expires += self.timeout - old_timeout
2129
if self.expires <= now:
2130
# The timeout has passed
2131
self.disable()
2132
else:
2133
if (getattr(self, "disable_initiator_tag", None)
2134
is None):
2135
return
2136
GLib.source_remove(self.disable_initiator_tag)
2137
self.disable_initiator_tag = GLib.timeout_add(
2138
int((self.expires - now).total_seconds() * 1000),
2139
self.disable)
2140
1188
2141
# ExtendedTimeout - property
1189
@dbus_service_property(_interface, signature="t",
2142
@dbus_service_property(_interface,
2143
signature="t",
1190
2144
access="readwrite")
1191
2145
def ExtendedTimeout_dbus_property(self, value=None):
1192
2146
if value is None: # get
1193
return dbus.UInt64(self.extended_timeout_milliseconds())
2147
return dbus.UInt64(self.extended_timeout.total_seconds()
2148
* 1000)
1194
2149
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1195
2150
1196
2151
# Interval - property
1197
@dbus_service_property(_interface, signature="t",
2152
@dbus_service_property(_interface,
2153
signature="t",
1198
2154
access="readwrite")
1199
2155
def Interval_dbus_property(self, value=None):
1200
2156
if value is None: # get
1201
return dbus.UInt64(self.interval_milliseconds())
2157
return dbus.UInt64(self.interval.total_seconds() * 1000)
1202
2158
self.interval = datetime.timedelta(0, 0, 0, value)
1203
2159
if getattr(self, "checker_initiator_tag", None) is None:
1204
2160
return
1205
# Reschedule checker run
1206
gobject.source_remove(self.checker_initiator_tag)
1207
self.checker_initiator_tag = (gobject.timeout_add
1208
(value, self.start_checker))
1209
self.start_checker() # Start one now, too
1210
2161
if self.enabled:
2162
# Reschedule checker run
2163
GLib.source_remove(self.checker_initiator_tag)
2164
self.checker_initiator_tag = GLib.timeout_add(
2165
value, self.start_checker)
2166
self.start_checker() # Start one now, too
2167
1211
2168
# Checker - property
1212
@dbus_service_property(_interface, signature="s",
2169
@dbus_service_property(_interface,
2170
signature="s",
1213
2171
access="readwrite")
1214
2172
def Checker_dbus_property(self, value=None):
1215
2173
if value is None: # get
1216
2174
return dbus.String(self.checker_command)
1217
self.checker_command = value
1218
2175
self.checker_command = str(value)
2176
1219
2177
# CheckerRunning - property
1220
@dbus_service_property(_interface, signature="b",
2178
@dbus_service_property(_interface,
2179
signature="b",
1221
2180
access="readwrite")
1222
2181
def CheckerRunning_dbus_property(self, value=None):
1223
2182
if value is None: # get
1226
2185
self.start_checker()
1227
2186
else:
1228
2187
self.stop_checker()
1229
2188
1230
2189
# ObjectPath - property
2190
@dbus_annotations(
2191
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
2192
"org.freedesktop.DBus.Deprecated": "true"})
1231
2193
@dbus_service_property(_interface, signature="o", access="read")
1232
2194
def ObjectPath_dbus_property(self):
1233
return self.dbus_object_path # is already a dbus.ObjectPath
1234
2195
return self.dbus_object_path # is already a dbus.ObjectPath
2196
1235
2197
# Secret = property
1236
@dbus_service_property(_interface, signature="ay",
1237
access="write", byte_arrays=True)
2198
@dbus_annotations(
2199
{"org.freedesktop.DBus.Property.EmitsChangedSignal":
2200
"invalidates"})
2201
@dbus_service_property(_interface,
2202
signature="ay",
2203
access="write",
2204
byte_arrays=True)
1238
2205
def Secret_dbus_property(self, value):
1239
self.secret = str(value)
1240
2206
self.secret = bytes(value)
2207
1241
2208
del _interface
1242
2209
1243
2210
1244
2211
class ProxyClient(object):
1245
def __init__(self, child_pipe, fpr, address):
2212
def __init__(self, child_pipe, key_id, fpr, address):
1246
2213
self._pipe = child_pipe
1247
self._pipe.send(('init', fpr, address))
2214
self._pipe.send(('init', key_id, fpr, address))
1248
2215
if not self._pipe.recv():
1249
raise KeyError()
1250
2216
raise KeyError(key_id or fpr)
2217
1251
2218
def __getattribute__(self, name):
1252
if(name == '_pipe'):
2219
if name == '_pipe':
1253
2220
return super(ProxyClient, self).__getattribute__(name)
1254
2221
self._pipe.send(('getattr', name))
1255
2222
data = self._pipe.recv()
1256
2223
if data[0] == 'data':
1257
2224
return data[1]
1258
2225
if data[0] == 'function':
2226
1259
2227
def func(*args, **kwargs):
1260
2228
self._pipe.send(('funcall', name, args, kwargs))
1261
2229
return self._pipe.recv()[1]
2230
1262
2231
return func
1263
2232
1264
2233
def __setattr__(self, name, value):
1265
if(name == '_pipe'):
2234
if name == '_pipe':
1266
2235
return super(ProxyClient, self).__setattr__(name, value)
1267
2236
self._pipe.send(('setattr', name, value))
1268
2237
1269
class ClientDBusTransitional(ClientDBus):
1270
__metaclass__ = AlternateDBusNamesMetaclass
1271
2238
1272
2239
class ClientHandler(socketserver.BaseRequestHandler, object):
1273
2240
"""A class to handle client connections.
1274
2241
1275
2242
Instantiated once for each connection to handle it.
1276
2243
Note: This will run in its own forked process."""
1277
2244
1278
2245
def handle(self):
1279
2246
with contextlib.closing(self.server.child_pipe) as child_pipe:
1280
2247
logger.info("TCP connection from: %s",
1281
unicode(self.client_address))
2248
str(self.client_address))
1282
2249
logger.debug("Pipe FD: %d",
1283
2250
self.server.child_pipe.fileno())
1284
1285
session = (gnutls.connection
1286
.ClientSession(self.request,
1287
gnutls.connection
1288
.X509Credentials()))
1289
1290
# Note: gnutls.connection.X509Credentials is really a
1291
# generic GnuTLS certificate credentials object so long as
1292
# no X.509 keys are added to it. Therefore, we can use it
1293
# here despite using OpenPGP certificates.
1294
1295
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1296
# "+AES-256-CBC", "+SHA1",
1297
# "+COMP-NULL", "+CTYPE-OPENPGP",
1298
# "+DHE-DSS"))
2251
2252
session = gnutls.ClientSession(self.request)
2253
2254
# priority = ':'.join(("NONE", "+VERS-TLS1.1",
2255
# "+AES-256-CBC", "+SHA1",
2256
# "+COMP-NULL", "+CTYPE-OPENPGP",
2257
# "+DHE-DSS"))
1299
2258
# Use a fallback default, since this MUST be set.
1300
2259
priority = self.server.gnutls_priority
1301
2260
if priority is None:
1302
2261
priority = "NORMAL"
1303
(gnutls.library.functions
1304
.gnutls_priority_set_direct(session._c_object,
1305
priority, None))
1306
2262
gnutls.priority_set_direct(session._c_object,
2263
priority.encode("utf-8"),
2264
None)
2265
1307
2266
# Start communication using the Mandos protocol
1308
2267
# Get protocol number
1309
2268
line = self.request.makefile().readline()
1310
2269
logger.debug("Protocol version: %r", line)
1311
2270
try:
1312
2271
if int(line.strip().split()[0]) > 1:
1313
raise RuntimeError
2272
raise RuntimeError(line)
1314
2273
except (ValueError, IndexError, RuntimeError) as error:
1315
2274
logger.error("Unknown protocol version: %s", error)
1316
2275
return
1317
2276
1318
2277
# Start GnuTLS connection
1319
2278
try:
1320
2279
session.handshake()
1321
except gnutls.errors.GNUTLSError as error:
2280
except gnutls.Error as error:
1322
2281
logger.warning("Handshake failed: %s", error)
1323
2282
# Do not run session.bye() here: the session is not
1324
2283
# established. Just abandon the request.
1325
2284
return
1326
2285
logger.debug("Handshake succeeded")
1327
2286
1328
2287
approval_required = False
1329
2288
try:
1330
try:
1331
fpr = self.fingerprint(self.peer_certificate
1332
(session))
1333
except (TypeError,
1334
gnutls.errors.GNUTLSError) as error:
1335
logger.warning("Bad certificate: %s", error)
1336
return
1337
logger.debug("Fingerprint: %s", fpr)
1338
1339
try:
1340
client = ProxyClient(child_pipe, fpr,
2289
if gnutls.has_rawpk:
2290
fpr = ""
2291
try:
2292
key_id = self.key_id(
2293
self.peer_certificate(session))
2294
except (TypeError, gnutls.Error) as error:
2295
logger.warning("Bad certificate: %s", error)
2296
return
2297
logger.debug("Key ID: %s", key_id)
2298
2299
else:
2300
key_id = ""
2301
try:
2302
fpr = self.fingerprint(
2303
self.peer_certificate(session))
2304
except (TypeError, gnutls.Error) as error:
2305
logger.warning("Bad certificate: %s", error)
2306
return
2307
logger.debug("Fingerprint: %s", fpr)
2308
2309
try:
2310
client = ProxyClient(child_pipe, key_id, fpr,
1341
2311
self.client_address)
1342
2312
except KeyError:
1343
2313
return
1344
2314
1345
2315
if client.approval_delay:
1346
2316
delay = client.approval_delay
1347
2317
client.approvals_pending += 1
1348
2318
approval_required = True
1349
2319
1350
2320
while True:
1351
2321
if not client.enabled:
1352
2322
logger.info("Client %s is disabled",
1353
client.name)
2323
client.name)
1354
2324
if self.server.use_dbus:
1355
2325
# Emit D-Bus signal
1356
client.Rejected("Disabled")
2326
client.Rejected("Disabled")
1357
2327
return
1358
1359
if client._approved or not client.approval_delay:
1360
#We are approved or approval is disabled
2328
2329
if client.approved or not client.approval_delay:
2330
# We are approved or approval is disabled
1361
2331
break
1362
elif client._approved is None:
2332
elif client.approved is None:
1363
2333
logger.info("Client %s needs approval",
1364
2334
client.name)
1365
2335
if self.server.use_dbus:
1366
2336
# Emit D-Bus signal
1367
2337
client.NeedApproval(
1368
client.approval_delay_milliseconds(),
1369
client.approved_by_default)
2338
client.approval_delay.total_seconds()
2339
* 1000, client.approved_by_default)
1370
2340
else:
1371
2341
logger.warning("Client %s was not approved",
1372
2342
client.name)
1374
2344
# Emit D-Bus signal
1375
2345
client.Rejected("Denied")
1376
2346
return
1377
1378
#wait until timeout or approved
1379
#x = float(client._timedelta_to_milliseconds(delay))
2347
2348
# wait until timeout or approved
1380
2349
time = datetime.datetime.now()
1381
2350
client.changedstate.acquire()
1382
client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))
2351
client.changedstate.wait(delay.total_seconds())
1383
2352
client.changedstate.release()
1384
2353
time2 = datetime.datetime.now()
1385
2354
if (time2 - time) >= delay:
1395
2364
break
1396
2365
else:
1397
2366
delay -= time2 - time
1398
1399
sent_size = 0
1400
while sent_size < len(client.secret):
1401
try:
1402
sent = session.send(client.secret[sent_size:])
1403
except gnutls.errors.GNUTLSError as error:
1404
logger.warning("gnutls send failed")
1405
return
1406
logger.debug("Sent: %d, remaining: %d",
1407
sent, len(client.secret)
1408
- (sent_size + sent))
1409
sent_size += sent
1410
2367
2368
try:
2369
session.send(client.secret)
2370
except gnutls.Error as error:
2371
logger.warning("gnutls send failed",
2372
exc_info=error)
2373
return
2374
1411
2375
logger.info("Sending secret to %s", client.name)
1412
# bump the timeout as if seen
1413
client.checked_ok(client.extended_timeout)
2376
# bump the timeout using extended_timeout
2377
client.bump_timeout(client.extended_timeout)
1414
2378
if self.server.use_dbus:
1415
2379
# Emit D-Bus signal
1416
2380
client.GotSecret()
1417
2381
1418
2382
finally:
1419
2383
if approval_required:
1420
2384
client.approvals_pending -= 1
1421
2385
try:
1422
2386
session.bye()
1423
except gnutls.errors.GNUTLSError as error:
1424
logger.warning("GnuTLS bye failed")
1425
2387
except gnutls.Error as error:
2388
logger.warning("GnuTLS bye failed",
2389
exc_info=error)
2390
1426
2391
@staticmethod
1427
2392
def peer_certificate(session):
1428
"Return the peer's OpenPGP certificate as a bytestring"
1429
# If not an OpenPGP certificate...
1430
if (gnutls.library.functions
1431
.gnutls_certificate_type_get(session._c_object)
1432
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1433
# ...do the normal thing
1434
return session.peer_certificate
2393
"Return the peer's certificate as a bytestring"
2394
try:
2395
cert_type = gnutls.certificate_type_get2(session._c_object,
2396
gnutls.CTYPE_PEERS)
2397
except AttributeError:
2398
cert_type = gnutls.certificate_type_get(session._c_object)
2399
if gnutls.has_rawpk:
2400
valid_cert_types = frozenset((gnutls.CRT_RAWPK,))
2401
else:
2402
valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))
2403
# If not a valid certificate type...
2404
if cert_type not in valid_cert_types:
2405
logger.info("Cert type %r not in %r", cert_type,
2406
valid_cert_types)
2407
# ...return invalid data
2408
return b""
1435
2409
list_size = ctypes.c_uint(1)
1436
cert_list = (gnutls.library.functions
1437
.gnutls_certificate_get_peers
2410
cert_list = (gnutls.certificate_get_peers
1438
2411
(session._c_object, ctypes.byref(list_size)))
1439
2412
if not bool(cert_list) and list_size.value != 0:
1440
raise gnutls.errors.GNUTLSError("error getting peer"
1441
" certificate")
2413
raise gnutls.Error("error getting peer certificate")
1442
2414
if list_size.value == 0:
1443
2415
return None
1444
2416
cert = cert_list[0]
1445
2417
return ctypes.string_at(cert.data, cert.size)
1446
2418
2419
@staticmethod
2420
def key_id(certificate):
2421
"Convert a certificate bytestring to a hexdigit key ID"
2422
# New GnuTLS "datum" with the public key
2423
datum = gnutls.datum_t(
2424
ctypes.cast(ctypes.c_char_p(certificate),
2425
ctypes.POINTER(ctypes.c_ubyte)),
2426
ctypes.c_uint(len(certificate)))
2427
# XXX all these need to be created in the gnutls "module"
2428
# New empty GnuTLS certificate
2429
pubkey = gnutls.pubkey_t()
2430
gnutls.pubkey_init(ctypes.byref(pubkey))
2431
# Import the raw public key into the certificate
2432
gnutls.pubkey_import(pubkey,
2433
ctypes.byref(datum),
2434
gnutls.X509_FMT_DER)
2435
# New buffer for the key ID
2436
buf = ctypes.create_string_buffer(32)
2437
buf_len = ctypes.c_size_t(len(buf))
2438
# Get the key ID from the raw public key into the buffer
2439
gnutls.pubkey_get_key_id(pubkey,
2440
gnutls.KEYID_USE_SHA256,
2441
ctypes.cast(ctypes.byref(buf),
2442
ctypes.POINTER(ctypes.c_ubyte)),
2443
ctypes.byref(buf_len))
2444
# Deinit the certificate
2445
gnutls.pubkey_deinit(pubkey)
2446
2447
# Convert the buffer to a Python bytestring
2448
key_id = ctypes.string_at(buf, buf_len.value)
2449
# Convert the bytestring to hexadecimal notation
2450
hex_key_id = binascii.hexlify(key_id).upper()
2451
return hex_key_id
2452
1447
2453
@staticmethod
1448
2454
def fingerprint(openpgp):
1449
2455
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1450
2456
# New GnuTLS "datum" with the OpenPGP public key
1451
datum = (gnutls.library.types
1452
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1453
ctypes.POINTER
1454
(ctypes.c_ubyte)),
1455
ctypes.c_uint(len(openpgp))))
2457
datum = gnutls.datum_t(
2458
ctypes.cast(ctypes.c_char_p(openpgp),
2459
ctypes.POINTER(ctypes.c_ubyte)),
2460
ctypes.c_uint(len(openpgp)))
1456
2461
# New empty GnuTLS certificate
1457
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1458
(gnutls.library.functions
1459
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
2462
crt = gnutls.openpgp_crt_t()
2463
gnutls.openpgp_crt_init(ctypes.byref(crt))
1460
2464
# Import the OpenPGP public key into the certificate
1461
(gnutls.library.functions
1462
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1463
gnutls.library.constants
1464
.GNUTLS_OPENPGP_FMT_RAW))
2465
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2466
gnutls.OPENPGP_FMT_RAW)
1465
2467
# Verify the self signature in the key
1466
2468
crtverify = ctypes.c_uint()
1467
(gnutls.library.functions
1468
.gnutls_openpgp_crt_verify_self(crt, 0,
1469
ctypes.byref(crtverify)))
2469
gnutls.openpgp_crt_verify_self(crt, 0,
2470
ctypes.byref(crtverify))
1470
2471
if crtverify.value != 0:
1471
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1472
raise (gnutls.errors.CertificateSecurityError
1473
("Verify failed"))
2472
gnutls.openpgp_crt_deinit(crt)
2473
raise gnutls.CertificateSecurityError(code
2474
=crtverify.value)
1474
2475
# New buffer for the fingerprint
1475
2476
buf = ctypes.create_string_buffer(20)
1476
2477
buf_len = ctypes.c_size_t()
1477
2478
# Get the fingerprint from the certificate into the buffer
1478
(gnutls.library.functions
1479
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1480
ctypes.byref(buf_len)))
2479
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2480
ctypes.byref(buf_len))
1481
2481
# Deinit the certificate
1482
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2482
gnutls.openpgp_crt_deinit(crt)
1483
2483
# Convert the buffer to a Python bytestring
1484
2484
fpr = ctypes.string_at(buf, buf_len.value)
1485
2485
# Convert the bytestring to hexadecimal notation
1486
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
2486
hex_fpr = binascii.hexlify(fpr).upper()
1487
2487
return hex_fpr
1488
2488
1489
2489
1490
2490
class MultiprocessingMixIn(object):
1491
2491
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2492
1492
2493
def sub_process_main(self, request, address):
1493
2494
try:
1494
2495
self.finish_request(request, address)
1495
except:
2496
except Exception:
1496
2497
self.handle_error(request, address)
1497
2498
self.close_request(request)
1498
2499
1499
2500
def process_request(self, request, address):
1500
2501
"""Start a new process to process the request."""
1501
multiprocessing.Process(target = self.sub_process_main,
1502
args = (request, address)).start()
2502
proc = multiprocessing.Process(target=self.sub_process_main,
2503
args=(request, address))
2504
proc.start()
2505
return proc
1503
2506
1504
2507
1505
2508
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1506
2509
""" adds a pipe to the MixIn """
2510
1507
2511
def process_request(self, request, client_address):
1508
2512
"""Overrides and wraps the original process_request().
1509
2513
1510
2514
This function creates a new pipe in self.pipe
1511
2515
"""
1512
2516
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1513
1514
super(MultiprocessingMixInWithPipe,
1515
self).process_request(request, client_address)
2517
2518
proc = MultiprocessingMixIn.process_request(self, request,
2519
client_address)
1516
2520
self.child_pipe.close()
1517
self.add_pipe(parent_pipe)
1518
1519
def add_pipe(self, parent_pipe):
2521
self.add_pipe(parent_pipe, proc)
2522
2523
def add_pipe(self, parent_pipe, proc):
1520
2524
"""Dummy function; override as necessary"""
1521
raise NotImplementedError
2525
raise NotImplementedError()
1522
2526
1523
2527
1524
2528
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1525
2529
socketserver.TCPServer, object):
1526
2530
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1527
2531
1528
2532
Attributes:
1529
2533
enabled: Boolean; whether this server is activated yet
1530
2534
interface: None or a network interface name (string)
1531
2535
use_ipv6: Boolean; to use IPv6 or not
1532
2536
"""
2537
1533
2538
def __init__(self, server_address, RequestHandlerClass,
1534
interface=None, use_ipv6=True):
2539
interface=None,
2540
use_ipv6=True,
2541
socketfd=None):
2542
"""If socketfd is set, use that file descriptor instead of
2543
creating a new one with socket.socket().
2544
"""
1535
2545
self.interface = interface
1536
2546
if use_ipv6:
1537
2547
self.address_family = socket.AF_INET6
2548
if socketfd is not None:
2549
# Save the file descriptor
2550
self.socketfd = socketfd
2551
# Save the original socket.socket() function
2552
self.socket_socket = socket.socket
2553
2554
# To implement --socket, we monkey patch socket.socket.
2555
#
2556
# (When socketserver.TCPServer is a new-style class, we
2557
# could make self.socket into a property instead of monkey
2558
# patching socket.socket.)
2559
#
2560
# Create a one-time-only replacement for socket.socket()
2561
@functools.wraps(socket.socket)
2562
def socket_wrapper(*args, **kwargs):
2563
# Restore original function so subsequent calls are
2564
# not affected.
2565
socket.socket = self.socket_socket
2566
del self.socket_socket
2567
# This time only, return a new socket object from the
2568
# saved file descriptor.
2569
return socket.fromfd(self.socketfd, *args, **kwargs)
2570
# Replace socket.socket() function with wrapper
2571
socket.socket = socket_wrapper
2572
# The socketserver.TCPServer.__init__ will call
2573
# socket.socket(), which might be our replacement,
2574
# socket_wrapper(), if socketfd was set.
1538
2575
socketserver.TCPServer.__init__(self, server_address,
1539
2576
RequestHandlerClass)
2577
1540
2578
def server_bind(self):
1541
2579
"""This overrides the normal server_bind() function
1542
2580
to bind to an interface if one was specified, and also NOT to
1543
2581
bind to an address or port if they were not specified."""
2582
global SO_BINDTODEVICE
1544
2583
if self.interface is not None:
1545
2584
if SO_BINDTODEVICE is None:
1546
logger.error("SO_BINDTODEVICE does not exist;"
1547
" cannot bind to interface %s",
1548
self.interface)
1549
else:
1550
try:
1551
self.socket.setsockopt(socket.SOL_SOCKET,
1552
SO_BINDTODEVICE,
1553
str(self.interface
1554
+ '\0'))
1555
except socket.error as error:
1556
if error[0] == errno.EPERM:
1557
logger.error("No permission to"
1558
" bind to interface %s",
1559
self.interface)
1560
elif error[0] == errno.ENOPROTOOPT:
1561
logger.error("SO_BINDTODEVICE not available;"
1562
" cannot bind to interface %s",
1563
self.interface)
1564
else:
1565
raise
2585
# Fall back to a hard-coded value which seems to be
2586
# common enough.
2587
logger.warning("SO_BINDTODEVICE not found, trying 25")
2588
SO_BINDTODEVICE = 25
2589
try:
2590
self.socket.setsockopt(
2591
socket.SOL_SOCKET, SO_BINDTODEVICE,
2592
(self.interface + "\0").encode("utf-8"))
2593
except socket.error as error:
2594
if error.errno == errno.EPERM:
2595
logger.error("No permission to bind to"
2596
" interface %s", self.interface)
2597
elif error.errno == errno.ENOPROTOOPT:
2598
logger.error("SO_BINDTODEVICE not available;"
2599
" cannot bind to interface %s",
2600
self.interface)
2601
elif error.errno == errno.ENODEV:
2602
logger.error("Interface %s does not exist,"
2603
" cannot bind", self.interface)
2604
else:
2605
raise
1566
2606
# Only bind(2) the socket if we really need to.
1567
2607
if self.server_address[0] or self.server_address[1]:
2608
if self.server_address[1]:
2609
self.allow_reuse_address = True
1568
2610
if not self.server_address[0]:
1569
2611
if self.address_family == socket.AF_INET6:
1570
any_address = "::" # in6addr_any
2612
any_address = "::" # in6addr_any
1571
2613
else:
1572
any_address = socket.INADDR_ANY
2614
any_address = "0.0.0.0" # INADDR_ANY
1573
2615
self.server_address = (any_address,
1574
2616
self.server_address[1])
1575
2617
elif not self.server_address[1]:
1576
self.server_address = (self.server_address[0],
1577
0)
2618
self.server_address = (self.server_address[0], 0)
1578
2619
# if self.interface:
1579
2620
# self.server_address = (self.server_address[0],
1580
2621
# 0, # port
1586
2627
1587
2628
class MandosServer(IPv6_TCPServer):
1588
2629
"""Mandos server.
1589
2630
1590
2631
Attributes:
1591
2632
clients: set of Client objects
1592
2633
gnutls_priority GnuTLS priority string
1593
2634
use_dbus: Boolean; to emit D-Bus signals or not
1594
1595
Assumes a gobject.MainLoop event loop.
2635
2636
Assumes a GLib.MainLoop event loop.
1596
2637
"""
2638
1597
2639
def __init__(self, server_address, RequestHandlerClass,
1598
interface=None, use_ipv6=True, clients=None,
1599
gnutls_priority=None, use_dbus=True):
2640
interface=None,
2641
use_ipv6=True,
2642
clients=None,
2643
gnutls_priority=None,
2644
use_dbus=True,
2645
socketfd=None):
1600
2646
self.enabled = False
1601
2647
self.clients = clients
1602
2648
if self.clients is None:
1603
self.clients = set()
2649
self.clients = {}
1604
2650
self.use_dbus = use_dbus
1605
2651
self.gnutls_priority = gnutls_priority
1606
2652
IPv6_TCPServer.__init__(self, server_address,
1607
2653
RequestHandlerClass,
1608
interface = interface,
1609
use_ipv6 = use_ipv6)
2654
interface=interface,
2655
use_ipv6=use_ipv6,
2656
socketfd=socketfd)
2657
1610
2658
def server_activate(self):
1611
2659
if self.enabled:
1612
2660
return socketserver.TCPServer.server_activate(self)
2661
1613
2662
def enable(self):
1614
2663
self.enabled = True
1615
def add_pipe(self, parent_pipe):
2664
2665
def add_pipe(self, parent_pipe, proc):
1616
2666
# Call "handle_ipc" for both data and EOF events
1617
gobject.io_add_watch(parent_pipe.fileno(),
1618
gobject.IO_IN | gobject.IO_HUP,
1619
functools.partial(self.handle_ipc,
1620
parent_pipe = parent_pipe))
1621
1622
def handle_ipc(self, source, condition, parent_pipe=None,
2667
GLib.io_add_watch(
2668
parent_pipe.fileno(),
2669
GLib.IO_IN | GLib.IO_HUP,
2670
functools.partial(self.handle_ipc,
2671
parent_pipe=parent_pipe,
2672
proc=proc))
2673
2674
def handle_ipc(self, source, condition,
2675
parent_pipe=None,
2676
proc=None,
1623
2677
client_object=None):
1624
condition_names = {
1625
gobject.IO_IN: "IN", # There is data to read.
1626
gobject.IO_OUT: "OUT", # Data can be written (without
1627
# blocking).
1628
gobject.IO_PRI: "PRI", # There is urgent data to read.
1629
gobject.IO_ERR: "ERR", # Error condition.
1630
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1631
# broken, usually for pipes and
1632
# sockets).
1633
}
1634
conditions_string = ' | '.join(name
1635
for cond, name in
1636
condition_names.iteritems()
1637
if cond & condition)
1638
# error or the other end of multiprocessing.Pipe has closed
1639
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
2678
# error, or the other end of multiprocessing.Pipe has closed
2679
if condition & (GLib.IO_ERR | GLib.IO_HUP):
2680
# Wait for other process to exit
2681
proc.join()
1640
2682
return False
1641
2683
1642
2684
# Read a request from the child
1643
2685
request = parent_pipe.recv()
1644
2686
command = request[0]
1645
2687
1646
2688
if command == 'init':
1647
fpr = request[1]
1648
address = request[2]
1649
1650
for c in self.clients:
1651
if c.fingerprint == fpr:
2689
key_id = request[1].decode("ascii")
2690
fpr = request[2].decode("ascii")
2691
address = request[3]
2692
2693
for c in self.clients.values():
2694
if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":
2695
continue
2696
if key_id and c.key_id == key_id:
2697
client = c
2698
break
2699
if fpr and c.fingerprint == fpr:
1652
2700
client = c
1653
2701
break
1654
2702
else:
1655
logger.info("Client not found for fingerprint: %s, ad"
1656
"dress: %s", fpr, address)
2703
logger.info("Client not found for key ID: %s, address"
2704
": %s", key_id or fpr, address)
1657
2705
if self.use_dbus:
1658
2706
# Emit D-Bus signal
1659
mandos_dbus_service.ClientNotFound(fpr, address[0])
2707
mandos_dbus_service.ClientNotFound(key_id or fpr,
2708
address[0])
1660
2709
parent_pipe.send(False)
1661
2710
return False
1662
1663
gobject.io_add_watch(parent_pipe.fileno(),
1664
gobject.IO_IN | gobject.IO_HUP,
1665
functools.partial(self.handle_ipc,
1666
parent_pipe = parent_pipe,
1667
client_object = client))
2711
2712
GLib.io_add_watch(
2713
parent_pipe.fileno(),
2714
GLib.IO_IN | GLib.IO_HUP,
2715
functools.partial(self.handle_ipc,
2716
parent_pipe=parent_pipe,
2717
proc=proc,
2718
client_object=client))
1668
2719
parent_pipe.send(True)
1669
# remove the old hook in favor of the new above hook on same fileno
2720
# remove the old hook in favor of the new above hook on
2721
# same fileno
1670
2722
return False
1671
2723
if command == 'funcall':
1672
2724
funcname = request[1]
1673
2725
args = request[2]
1674
2726
kwargs = request[3]
1675
1676
parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))
1677
2727
2728
parent_pipe.send(('data', getattr(client_object,
2729
funcname)(*args,
2730
**kwargs)))
2731
1678
2732
if command == 'getattr':
1679
2733
attrname = request[1]
1680
if callable(client_object.__getattribute__(attrname)):
1681
parent_pipe.send(('function',))
2734
if isinstance(client_object.__getattribute__(attrname),
2735
collections.Callable):
2736
parent_pipe.send(('function', ))
1682
2737
else:
1683
parent_pipe.send(('data', client_object.__getattribute__(attrname)))
1684
2738
parent_pipe.send((
2739
'data', client_object.__getattribute__(attrname)))
2740
1685
2741
if command == 'setattr':
1686
2742
attrname = request[1]
1687
2743
value = request[2]
1688
2744
setattr(client_object, attrname, value)
1689
2745
1690
2746
return True
1691
2747
1692
2748
2749
def rfc3339_duration_to_delta(duration):
2750
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2751
2752
>>> rfc3339_duration_to_delta("P7D")
2753
datetime.timedelta(7)
2754
>>> rfc3339_duration_to_delta("PT60S")
2755
datetime.timedelta(0, 60)
2756
>>> rfc3339_duration_to_delta("PT60M")
2757
datetime.timedelta(0, 3600)
2758
>>> rfc3339_duration_to_delta("PT24H")
2759
datetime.timedelta(1)
2760
>>> rfc3339_duration_to_delta("P1W")
2761
datetime.timedelta(7)
2762
>>> rfc3339_duration_to_delta("PT5M30S")
2763
datetime.timedelta(0, 330)
2764
>>> rfc3339_duration_to_delta("P1DT3M20S")
2765
datetime.timedelta(1, 200)
2766
"""
2767
2768
# Parsing an RFC 3339 duration with regular expressions is not
2769
# possible - there would have to be multiple places for the same
2770
# values, like seconds. The current code, while more esoteric, is
2771
# cleaner without depending on a parsing library. If Python had a
2772
# built-in library for parsing we would use it, but we'd like to
2773
# avoid excessive use of external libraries.
2774
2775
# New type for defining tokens, syntax, and semantics all-in-one
2776
Token = collections.namedtuple("Token", (
2777
"regexp", # To match token; if "value" is not None, must have
2778
# a "group" containing digits
2779
"value", # datetime.timedelta or None
2780
"followers")) # Tokens valid after this token
2781
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2782
# the "duration" ABNF definition in RFC 3339, Appendix A.
2783
token_end = Token(re.compile(r"$"), None, frozenset())
2784
token_second = Token(re.compile(r"(\d+)S"),
2785
datetime.timedelta(seconds=1),
2786
frozenset((token_end, )))
2787
token_minute = Token(re.compile(r"(\d+)M"),
2788
datetime.timedelta(minutes=1),
2789
frozenset((token_second, token_end)))
2790
token_hour = Token(re.compile(r"(\d+)H"),
2791
datetime.timedelta(hours=1),
2792
frozenset((token_minute, token_end)))
2793
token_time = Token(re.compile(r"T"),
2794
None,
2795
frozenset((token_hour, token_minute,
2796
token_second)))
2797
token_day = Token(re.compile(r"(\d+)D"),
2798
datetime.timedelta(days=1),
2799
frozenset((token_time, token_end)))
2800
token_month = Token(re.compile(r"(\d+)M"),
2801
datetime.timedelta(weeks=4),
2802
frozenset((token_day, token_end)))
2803
token_year = Token(re.compile(r"(\d+)Y"),
2804
datetime.timedelta(weeks=52),
2805
frozenset((token_month, token_end)))
2806
token_week = Token(re.compile(r"(\d+)W"),
2807
datetime.timedelta(weeks=1),
2808
frozenset((token_end, )))
2809
token_duration = Token(re.compile(r"P"), None,
2810
frozenset((token_year, token_month,
2811
token_day, token_time,
2812
token_week)))
2813
# Define starting values:
2814
# Value so far
2815
value = datetime.timedelta()
2816
found_token = None
2817
# Following valid tokens
2818
followers = frozenset((token_duration, ))
2819
# String left to parse
2820
s = duration
2821
# Loop until end token is found
2822
while found_token is not token_end:
2823
# Search for any currently valid tokens
2824
for token in followers:
2825
match = token.regexp.match(s)
2826
if match is not None:
2827
# Token found
2828
if token.value is not None:
2829
# Value found, parse digits
2830
factor = int(match.group(1), 10)
2831
# Add to value so far
2832
value += factor * token.value
2833
# Strip token from string
2834
s = token.regexp.sub("", s, 1)
2835
# Go to found token
2836
found_token = token
2837
# Set valid next tokens
2838
followers = found_token.followers
2839
break
2840
else:
2841
# No currently valid tokens were found
2842
raise ValueError("Invalid RFC 3339 duration: {!r}"
2843
.format(duration))
2844
# End token found
2845
return value
2846
2847
1693
2848
def string_to_delta(interval):
1694
2849
"""Parse a string and return a datetime.timedelta
1695
2850
1696
2851
>>> string_to_delta('7d')
1697
2852
datetime.timedelta(7)
1698
2853
>>> string_to_delta('60s')
1706
2861
>>> string_to_delta('5m 30s')
1707
2862
datetime.timedelta(0, 330)
1708
2863
"""
2864
2865
try:
2866
return rfc3339_duration_to_delta(interval)
2867
except ValueError:
2868
pass
2869
1709
2870
timevalue = datetime.timedelta(0)
1710
2871
for s in interval.split():
1711
2872
try:
1712
suffix = unicode(s[-1])
2873
suffix = s[-1]
1713
2874
value = int(s[:-1])
1714
2875
if suffix == "d":
1715
2876
delta = datetime.timedelta(value)
1722
2883
elif suffix == "w":
1723
2884
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1724
2885
else:
1725
raise ValueError("Unknown suffix %r" % suffix)
1726
except (ValueError, IndexError) as e:
2886
raise ValueError("Unknown suffix {!r}".format(suffix))
2887
except IndexError as e:
1727
2888
raise ValueError(*(e.args))
1728
2889
timevalue += delta
1729
2890
return timevalue
1730
2891
1731
2892
1732
def if_nametoindex(interface):
1733
"""Call the C function if_nametoindex(), or equivalent
1734
1735
Note: This function cannot accept a unicode string."""
1736
global if_nametoindex
1737
try:
1738
if_nametoindex = (ctypes.cdll.LoadLibrary
1739
(ctypes.util.find_library("c"))
1740
.if_nametoindex)
1741
except (OSError, AttributeError):
1742
logger.warning("Doing if_nametoindex the hard way")
1743
def if_nametoindex(interface):
1744
"Get an interface index the hard way, i.e. using fcntl()"
1745
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1746
with contextlib.closing(socket.socket()) as s:
1747
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1748
struct.pack(str("16s16x"),
1749
interface))
1750
interface_index = struct.unpack(str("I"),
1751
ifreq[16:20])[0]
1752
return interface_index
1753
return if_nametoindex(interface)
1754
1755
1756
def daemon(nochdir = False, noclose = False):
2893
def daemon(nochdir=False, noclose=False):
1757
2894
"""See daemon(3). Standard BSD Unix function.
1758
2895
1759
2896
This should really exist as os.daemon, but it doesn't (yet)."""
1760
2897
if os.fork():
1761
2898
sys.exit()
1766
2903
sys.exit()
1767
2904
if not noclose:
1768
2905
# Close all standard open file descriptors
1769
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2906
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1770
2907
if not stat.S_ISCHR(os.fstat(null).st_mode):
1771
2908
raise OSError(errno.ENODEV,
1772
"%s not a character device"
1773
% os.path.devnull)
2909
"{} not a character device"
2910
.format(os.devnull))
1774
2911
os.dup2(null, sys.stdin.fileno())
1775
2912
os.dup2(null, sys.stdout.fileno())
1776
2913
os.dup2(null, sys.stderr.fileno())
1779
2916
1780
2917
1781
2918
def main():
1782
2919
1783
2920
##################################################################
1784
2921
# Parsing of options, both command line and config file
1785
2922
1786
2923
parser = argparse.ArgumentParser()
1787
2924
parser.add_argument("-v", "--version", action="version",
1788
version = "%%(prog)s %s" % version,
2925
version="%(prog)s {}".format(version),
1789
2926
help="show version number and exit")
1790
2927
parser.add_argument("-i", "--interface", metavar="IF",
1791
2928
help="Bind to interface IF")
1797
2934
help="Run self-test")
1798
2935
parser.add_argument("--debug", action="store_true",
1799
2936
help="Debug mode; run in foreground and log"
1800
" to terminal")
2937
" to terminal", default=None)
1801
2938
parser.add_argument("--debuglevel", metavar="LEVEL",
1802
2939
help="Debug level for stdout output")
1803
2940
parser.add_argument("--priority", help="GnuTLS"
1810
2947
" files")
1811
2948
parser.add_argument("--no-dbus", action="store_false",
1812
2949
dest="use_dbus", help="Do not provide D-Bus"
1813
" system bus interface")
2950
" system bus interface", default=None)
1814
2951
parser.add_argument("--no-ipv6", action="store_false",
1815
dest="use_ipv6", help="Do not use IPv6")
2952
dest="use_ipv6", help="Do not use IPv6",
2953
default=None)
2954
parser.add_argument("--no-restore", action="store_false",
2955
dest="restore", help="Do not restore stored"
2956
" state", default=None)
2957
parser.add_argument("--socket", type=int,
2958
help="Specify a file descriptor to a network"
2959
" socket to use instead of creating one")
2960
parser.add_argument("--statedir", metavar="DIR",
2961
help="Directory to save/restore state in")
2962
parser.add_argument("--foreground", action="store_true",
2963
help="Run in foreground", default=None)
2964
parser.add_argument("--no-zeroconf", action="store_false",
2965
dest="zeroconf", help="Do not use Zeroconf",
2966
default=None)
2967
1816
2968
options = parser.parse_args()
1817
2969
1818
2970
if options.check:
1819
2971
import doctest
1820
doctest.testmod()
1821
sys.exit()
1822
2972
fail_count, test_count = doctest.testmod()
2973
sys.exit(os.EX_OK if fail_count == 0 else 1)
2974
1823
2975
# Default values for config file for server-global settings
1824
server_defaults = { "interface": "",
1825
"address": "",
1826
"port": "",
1827
"debug": "False",
1828
"priority":
1829
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1830
"servicename": "Mandos",
1831
"use_dbus": "True",
1832
"use_ipv6": "True",
1833
"debuglevel": "",
1834
}
1835
2976
if gnutls.has_rawpk:
2977
priority = ("SECURE128:!CTYPE-X.509:+CTYPE-RAWPK:!RSA"
2978
":!VERS-ALL:+VERS-TLS1.3:%PROFILE_ULTRA")
2979
else:
2980
priority = ("SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2981
":+SIGN-DSA-SHA256")
2982
server_defaults = {"interface": "",
2983
"address": "",
2984
"port": "",
2985
"debug": "False",
2986
"priority": priority,
2987
"servicename": "Mandos",
2988
"use_dbus": "True",
2989
"use_ipv6": "True",
2990
"debuglevel": "",
2991
"restore": "True",
2992
"socket": "",
2993
"statedir": "/var/lib/mandos",
2994
"foreground": "False",
2995
"zeroconf": "True",
2996
}
2997
del priority
2998
1836
2999
# Parse config file for server-global settings
1837
3000
server_config = configparser.SafeConfigParser(server_defaults)
1838
3001
del server_defaults
1839
server_config.read(os.path.join(options.configdir,
1840
"mandos.conf"))
3002
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1841
3003
# Convert the SafeConfigParser object to a dict
1842
3004
server_settings = server_config.defaults()
1843
3005
# Use the appropriate methods on the non-string config options
1844
for option in ("debug", "use_dbus", "use_ipv6"):
3006
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3007
"foreground", "zeroconf"):
1845
3008
server_settings[option] = server_config.getboolean("DEFAULT",
1846
3009
option)
1847
3010
if server_settings["port"]:
1848
3011
server_settings["port"] = server_config.getint("DEFAULT",
1849
3012
"port")
3013
if server_settings["socket"]:
3014
server_settings["socket"] = server_config.getint("DEFAULT",
3015
"socket")
3016
# Later, stdin will, and stdout and stderr might, be dup'ed
3017
# over with an opened os.devnull. But we don't want this to
3018
# happen with a supplied network socket.
3019
if 0 <= server_settings["socket"] <= 2:
3020
server_settings["socket"] = os.dup(server_settings
3021
["socket"])
1850
3022
del server_config
1851
3023
1852
3024
# Override the settings from the config file with command line
1853
3025
# options, if set.
1854
3026
for option in ("interface", "address", "port", "debug",
1855
"priority", "servicename", "configdir",
1856
"use_dbus", "use_ipv6", "debuglevel"):
3027
"priority", "servicename", "configdir", "use_dbus",
3028
"use_ipv6", "debuglevel", "restore", "statedir",
3029
"socket", "foreground", "zeroconf"):
1857
3030
value = getattr(options, option)
1858
3031
if value is not None:
1859
3032
server_settings[option] = value
1860
3033
del options
1861
3034
# Force all strings to be unicode
1862
3035
for option in server_settings.keys():
1863
if type(server_settings[option]) is str:
1864
server_settings[option] = unicode(server_settings[option])
3036
if isinstance(server_settings[option], bytes):
3037
server_settings[option] = (server_settings[option]
3038
.decode("utf-8"))
3039
# Force all boolean options to be boolean
3040
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3041
"foreground", "zeroconf"):
3042
server_settings[option] = bool(server_settings[option])
3043
# Debug implies foreground
3044
if server_settings["debug"]:
3045
server_settings["foreground"] = True
1865
3046
# Now we have our good server settings in "server_settings"
1866
3047
1867
3048
##################################################################
1868
3049
3050
if (not server_settings["zeroconf"]
3051
and not (server_settings["port"]
3052
or server_settings["socket"] != "")):
3053
parser.error("Needs port or socket to work without Zeroconf")
3054
1869
3055
# For convenience
1870
3056
debug = server_settings["debug"]
1871
3057
debuglevel = server_settings["debuglevel"]
1872
3058
use_dbus = server_settings["use_dbus"]
1873
3059
use_ipv6 = server_settings["use_ipv6"]
1874
3060
stored_state_path = os.path.join(server_settings["statedir"],
3061
stored_state_file)
3062
foreground = server_settings["foreground"]
3063
zeroconf = server_settings["zeroconf"]
3064
3065
if debug:
3066
initlogger(debug, logging.DEBUG)
3067
else:
3068
if not debuglevel:
3069
initlogger(debug)
3070
else:
3071
level = getattr(logging, debuglevel.upper())
3072
initlogger(debug, level)
3073
1875
3074
if server_settings["servicename"] != "Mandos":
1876
syslogger.setFormatter(logging.Formatter
1877
('Mandos (%s) [%%(process)d]:'
1878
' %%(levelname)s: %%(message)s'
1879
% server_settings["servicename"]))
1880
3075
syslogger.setFormatter(
3076
logging.Formatter('Mandos ({}) [%(process)d]:'
3077
' %(levelname)s: %(message)s'.format(
3078
server_settings["servicename"])))
3079
1881
3080
# Parse config file with clients
1882
client_defaults = { "timeout": "5m",
1883
"extended_timeout": "15m",
1884
"interval": "2m",
1885
"checker": "fping -q -- %%(host)s",
1886
"host": "",
1887
"approval_delay": "0s",
1888
"approval_duration": "1s",
1889
}
1890
client_config = configparser.SafeConfigParser(client_defaults)
3081
client_config = configparser.SafeConfigParser(Client
3082
.client_defaults)
1891
3083
client_config.read(os.path.join(server_settings["configdir"],
1892
3084
"clients.conf"))
1893
3085
1894
3086
global mandos_dbus_service
1895
3087
mandos_dbus_service = None
1896
1897
tcp_server = MandosServer((server_settings["address"],
1898
server_settings["port"]),
1899
ClientHandler,
1900
interface=(server_settings["interface"]
1901
or None),
1902
use_ipv6=use_ipv6,
1903
gnutls_priority=
1904
server_settings["priority"],
1905
use_dbus=use_dbus)
1906
if not debug:
1907
pidfilename = "/var/run/mandos.pid"
1908
try:
1909
pidfile = open(pidfilename, "w")
1910
except IOError:
1911
logger.error("Could not open file %r", pidfilename)
1912
1913
try:
1914
uid = pwd.getpwnam("_mandos").pw_uid
1915
gid = pwd.getpwnam("_mandos").pw_gid
1916
except KeyError:
1917
try:
1918
uid = pwd.getpwnam("mandos").pw_uid
1919
gid = pwd.getpwnam("mandos").pw_gid
3088
3089
socketfd = None
3090
if server_settings["socket"] != "":
3091
socketfd = server_settings["socket"]
3092
tcp_server = MandosServer(
3093
(server_settings["address"], server_settings["port"]),
3094
ClientHandler,
3095
interface=(server_settings["interface"] or None),
3096
use_ipv6=use_ipv6,
3097
gnutls_priority=server_settings["priority"],
3098
use_dbus=use_dbus,
3099
socketfd=socketfd)
3100
if not foreground:
3101
pidfilename = "/run/mandos.pid"
3102
if not os.path.isdir("/run/."):
3103
pidfilename = "/var/run/mandos.pid"
3104
pidfile = None
3105
try:
3106
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
3107
except IOError as e:
3108
logger.error("Could not open file %r", pidfilename,
3109
exc_info=e)
3110
3111
for name, group in (("_mandos", "_mandos"),
3112
("mandos", "mandos"),
3113
("nobody", "nogroup")):
3114
try:
3115
uid = pwd.getpwnam(name).pw_uid
3116
gid = pwd.getpwnam(group).pw_gid
3117
break
1920
3118
except KeyError:
1921
try:
1922
uid = pwd.getpwnam("nobody").pw_uid
1923
gid = pwd.getpwnam("nobody").pw_gid
1924
except KeyError:
1925
uid = 65534
1926
gid = 65534
3119
continue
3120
else:
3121
uid = 65534
3122
gid = 65534
1927
3123
try:
1928
3124
os.setgid(gid)
1929
3125
os.setuid(uid)
3126
if debug:
3127
logger.debug("Did setuid/setgid to {}:{}".format(uid,
3128
gid))
1930
3129
except OSError as error:
1931
if error[0] != errno.EPERM:
1932
raise error
1933
1934
if not debug and not debuglevel:
1935
syslogger.setLevel(logging.WARNING)
1936
console.setLevel(logging.WARNING)
1937
if debuglevel:
1938
level = getattr(logging, debuglevel.upper())
1939
syslogger.setLevel(level)
1940
console.setLevel(level)
1941
3130
logger.warning("Failed to setuid/setgid to {}:{}: {}"
3131
.format(uid, gid, os.strerror(error.errno)))
3132
if error.errno != errno.EPERM:
3133
raise
3134
1942
3135
if debug:
1943
3136
# Enable all possible GnuTLS debugging
1944
3137
1945
3138
# "Use a log level over 10 to enable all debugging options."
1946
3139
# - GnuTLS manual
1947
gnutls.library.functions.gnutls_global_set_log_level(11)
1948
1949
@gnutls.library.types.gnutls_log_func
3140
gnutls.global_set_log_level(11)
3141
3142
@gnutls.log_func
1950
3143
def debug_gnutls(level, string):
1951
3144
logger.debug("GnuTLS: %s", string[:-1])
1952
1953
(gnutls.library.functions
1954
.gnutls_global_set_log_function(debug_gnutls))
1955
3145
3146
gnutls.global_set_log_function(debug_gnutls)
3147
1956
3148
# Redirect stdin so all checkers get /dev/null
1957
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
3149
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1958
3150
os.dup2(null, sys.stdin.fileno())
1959
3151
if null > 2:
1960
3152
os.close(null)
1961
else:
1962
# No console logging
1963
logger.removeHandler(console)
1964
3153
1965
3154
# Need to fork before connecting to D-Bus
1966
if not debug:
3155
if not foreground:
1967
3156
# Close all input and output, do double fork, etc.
1968
3157
daemon()
1969
3158
3159
# multiprocessing will use threads, so before we use GLib we need
3160
# to inform GLib that threads will be used.
3161
GLib.threads_init()
3162
1970
3163
global main_loop
1971
3164
# From the Avahi example code
1972
DBusGMainLoop(set_as_default=True )
1973
main_loop = gobject.MainLoop()
3165
DBusGMainLoop(set_as_default=True)
3166
main_loop = GLib.MainLoop()
1974
3167
bus = dbus.SystemBus()
1975
3168
# End of Avahi example code
1976
3169
if use_dbus:
1977
3170
try:
1978
3171
bus_name = dbus.service.BusName("se.recompile.Mandos",
1979
bus, do_not_queue=True)
1980
old_bus_name = dbus.service.BusName("se.bsnet.fukt.Mandos",
1981
bus, do_not_queue=True)
1982
except dbus.exceptions.NameExistsException as e:
1983
logger.error(unicode(e) + ", disabling D-Bus")
3172
bus,
3173
do_not_queue=True)
3174
old_bus_name = dbus.service.BusName(
3175
"se.bsnet.fukt.Mandos", bus,
3176
do_not_queue=True)
3177
except dbus.exceptions.DBusException as e:
3178
logger.error("Disabling D-Bus:", exc_info=e)
1984
3179
use_dbus = False
1985
3180
server_settings["use_dbus"] = False
1986
3181
tcp_server.use_dbus = False
1987
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1988
service = AvahiService(name = server_settings["servicename"],
1989
servicetype = "_mandos._tcp",
1990
protocol = protocol, bus = bus)
1991
if server_settings["interface"]:
1992
service.interface = (if_nametoindex
1993
(str(server_settings["interface"])))
1994
3182
if zeroconf:
3183
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3184
service = AvahiServiceToSyslog(
3185
name=server_settings["servicename"],
3186
servicetype="_mandos._tcp",
3187
protocol=protocol,
3188
bus=bus)
3189
if server_settings["interface"]:
3190
service.interface = if_nametoindex(
3191
server_settings["interface"].encode("utf-8"))
3192
1995
3193
global multiprocessing_manager
1996
3194
multiprocessing_manager = multiprocessing.Manager()
1997
3195
1998
3196
client_class = Client
1999
3197
if use_dbus:
2000
client_class = functools.partial(ClientDBusTransitional, bus = bus)
2001
def client_config_items(config, section):
2002
special_settings = {
2003
"approved_by_default":
2004
lambda: config.getboolean(section,
2005
"approved_by_default"),
2006
}
2007
for name, value in config.items(section):
3198
client_class = functools.partial(ClientDBus, bus=bus)
3199
3200
client_settings = Client.config_parser(client_config)
3201
old_client_settings = {}
3202
clients_data = {}
3203
3204
# This is used to redirect stdout and stderr for checker processes
3205
global wnull
3206
wnull = open(os.devnull, "w") # A writable /dev/null
3207
# Only used if server is running in foreground but not in debug
3208
# mode
3209
if debug or not foreground:
3210
wnull.close()
3211
3212
# Get client data and settings from last running state.
3213
if server_settings["restore"]:
3214
try:
3215
with open(stored_state_path, "rb") as stored_state:
3216
if sys.version_info.major == 2:
3217
clients_data, old_client_settings = pickle.load(
3218
stored_state)
3219
else:
3220
bytes_clients_data, bytes_old_client_settings = (
3221
pickle.load(stored_state, encoding="bytes"))
3222
# Fix bytes to strings
3223
# clients_data
3224
# .keys()
3225
clients_data = {(key.decode("utf-8")
3226
if isinstance(key, bytes)
3227
else key): value
3228
for key, value in
3229
bytes_clients_data.items()}
3230
del bytes_clients_data
3231
for key in clients_data:
3232
value = {(k.decode("utf-8")
3233
if isinstance(k, bytes) else k): v
3234
for k, v in
3235
clients_data[key].items()}
3236
clients_data[key] = value
3237
# .client_structure
3238
value["client_structure"] = [
3239
(s.decode("utf-8")
3240
if isinstance(s, bytes)
3241
else s) for s in
3242
value["client_structure"]]
3243
# .name & .host
3244
for k in ("name", "host"):
3245
if isinstance(value[k], bytes):
3246
value[k] = value[k].decode("utf-8")
3247
if not value.has_key("key_id"):
3248
value["key_id"] = ""
3249
elif not value.has_key("fingerprint"):
3250
value["fingerprint"] = ""
3251
# old_client_settings
3252
# .keys()
3253
old_client_settings = {
3254
(key.decode("utf-8")
3255
if isinstance(key, bytes)
3256
else key): value
3257
for key, value in
3258
bytes_old_client_settings.items()}
3259
del bytes_old_client_settings
3260
# .host
3261
for value in old_client_settings.values():
3262
if isinstance(value["host"], bytes):
3263
value["host"] = (value["host"]
3264
.decode("utf-8"))
3265
os.remove(stored_state_path)
3266
except IOError as e:
3267
if e.errno == errno.ENOENT:
3268
logger.warning("Could not load persistent state:"
3269
" {}".format(os.strerror(e.errno)))
3270
else:
3271
logger.critical("Could not load persistent state:",
3272
exc_info=e)
3273
raise
3274
except EOFError as e:
3275
logger.warning("Could not load persistent state: "
3276
"EOFError:",
3277
exc_info=e)
3278
3279
with PGPEngine() as pgp:
3280
for client_name, client in clients_data.items():
3281
# Skip removed clients
3282
if client_name not in client_settings:
3283
continue
3284
3285
# Decide which value to use after restoring saved state.
3286
# We have three different values: Old config file,
3287
# new config file, and saved state.
3288
# New config value takes precedence if it differs from old
3289
# config value, otherwise use saved state.
3290
for name, value in client_settings[client_name].items():
3291
try:
3292
# For each value in new config, check if it
3293
# differs from the old config value (Except for
3294
# the "secret" attribute)
3295
if (name != "secret"
3296
and (value !=
3297
old_client_settings[client_name][name])):
3298
client[name] = value
3299
except KeyError:
3300
pass
3301
3302
# Clients who has passed its expire date can still be
3303
# enabled if its last checker was successful. A Client
3304
# whose checker succeeded before we stored its state is
3305
# assumed to have successfully run all checkers during
3306
# downtime.
3307
if client["enabled"]:
3308
if datetime.datetime.utcnow() >= client["expires"]:
3309
if not client["last_checked_ok"]:
3310
logger.warning(
3311
"disabling client {} - Client never "
3312
"performed a successful checker".format(
3313
client_name))
3314
client["enabled"] = False
3315
elif client["last_checker_status"] != 0:
3316
logger.warning(
3317
"disabling client {} - Client last"
3318
" checker failed with error code"
3319
" {}".format(
3320
client_name,
3321
client["last_checker_status"]))
3322
client["enabled"] = False
3323
else:
3324
client["expires"] = (
3325
datetime.datetime.utcnow()
3326
+ client["timeout"])
3327
logger.debug("Last checker succeeded,"
3328
" keeping {} enabled".format(
3329
client_name))
2008
3330
try:
2009
yield (name, special_settings[name]())
2010
except KeyError:
2011
yield (name, value)
2012
2013
tcp_server.clients.update(set(
2014
client_class(name = section,
2015
config= dict(client_config_items(
2016
client_config, section)))
2017
for section in client_config.sections()))
3331
client["secret"] = pgp.decrypt(
3332
client["encrypted_secret"],
3333
client_settings[client_name]["secret"])
3334
except PGPError:
3335
# If decryption fails, we use secret from new settings
3336
logger.debug("Failed to decrypt {} old secret".format(
3337
client_name))
3338
client["secret"] = (client_settings[client_name]
3339
["secret"])
3340
3341
# Add/remove clients based on new changes made to config
3342
for client_name in (set(old_client_settings)
3343
- set(client_settings)):
3344
del clients_data[client_name]
3345
for client_name in (set(client_settings)
3346
- set(old_client_settings)):
3347
clients_data[client_name] = client_settings[client_name]
3348
3349
# Create all client objects
3350
for client_name, client in clients_data.items():
3351
tcp_server.clients[client_name] = client_class(
3352
name=client_name,
3353
settings=client,
3354
server_settings=server_settings)
3355
2018
3356
if not tcp_server.clients:
2019
3357
logger.warning("No clients defined")
2020
2021
if not debug:
2022
try:
2023
with pidfile:
2024
pid = os.getpid()
2025
pidfile.write(str(pid) + "\n".encode("utf-8"))
2026
del pidfile
2027
except IOError:
2028
logger.error("Could not write to file %r with PID %d",
2029
pidfilename, pid)
2030
except NameError:
2031
# "pidfile" was never created
2032
pass
3358
3359
if not foreground:
3360
if pidfile is not None:
3361
pid = os.getpid()
3362
try:
3363
with pidfile:
3364
print(pid, file=pidfile)
3365
except IOError:
3366
logger.error("Could not write to file %r with PID %d",
3367
pidfilename, pid)
3368
del pidfile
2033
3369
del pidfilename
2034
2035
signal.signal(signal.SIGINT, signal.SIG_IGN)
2036
2037
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2038
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2039
3370
3371
for termsig in (signal.SIGHUP, signal.SIGTERM):
3372
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3373
lambda: main_loop.quit() and False)
3374
2040
3375
if use_dbus:
2041
class MandosDBusService(dbus.service.Object):
3376
3377
@alternate_dbus_interfaces(
3378
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3379
class MandosDBusService(DBusObjectWithObjectManager):
2042
3380
"""A D-Bus proxy object"""
3381
2043
3382
def __init__(self):
2044
3383
dbus.service.Object.__init__(self, bus, "/")
3384
2045
3385
_interface = "se.recompile.Mandos"
2046
3386
2047
3387
@dbus.service.signal(_interface, signature="o")
2048
3388
def ClientAdded(self, objpath):
2049
3389
"D-Bus signal"
2050
3390
pass
2051
3391
2052
3392
@dbus.service.signal(_interface, signature="ss")
2053
def ClientNotFound(self, fingerprint, address):
3393
def ClientNotFound(self, key_id, address):
2054
3394
"D-Bus signal"
2055
3395
pass
2056
3396
3397
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3398
"true"})
2057
3399
@dbus.service.signal(_interface, signature="os")
2058
3400
def ClientRemoved(self, objpath, name):
2059
3401
"D-Bus signal"
2060
3402
pass
2061
3403
3404
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3405
"true"})
2062
3406
@dbus.service.method(_interface, out_signature="ao")
2063
3407
def GetAllClients(self):
2064
3408
"D-Bus method"
2065
return dbus.Array(c.dbus_object_path
2066
for c in tcp_server.clients)
2067
3409
return dbus.Array(c.dbus_object_path for c in
3410
tcp_server.clients.values())
3411
3412
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3413
"true"})
2068
3414
@dbus.service.method(_interface,
2069
3415
out_signature="a{oa{sv}}")
2070
3416
def GetAllClientsWithProperties(self):
2071
3417
"D-Bus method"
2072
3418
return dbus.Dictionary(
2073
((c.dbus_object_path, c.GetAll(""))
2074
for c in tcp_server.clients),
3419
{c.dbus_object_path: c.GetAll(
3420
"se.recompile.Mandos.Client")
3421
for c in tcp_server.clients.values()},
2075
3422
signature="oa{sv}")
2076
3423
2077
3424
@dbus.service.method(_interface, in_signature="o")
2078
3425
def RemoveClient(self, object_path):
2079
3426
"D-Bus method"
2080
for c in tcp_server.clients:
3427
for c in tcp_server.clients.values():
2081
3428
if c.dbus_object_path == object_path:
2082
tcp_server.clients.remove(c)
3429
del tcp_server.clients[c.name]
2083
3430
c.remove_from_connection()
2084
# Don't signal anything except ClientRemoved
3431
# Don't signal the disabling
2085
3432
c.disable(quiet=True)
2086
# Emit D-Bus signal
2087
self.ClientRemoved(object_path, c.name)
3433
# Emit D-Bus signal for removal
3434
self.client_removed_signal(c)
2088
3435
return
2089
3436
raise KeyError(object_path)
2090
3437
2091
3438
del _interface
2092
2093
class MandosDBusServiceTransitional(MandosDBusService):
2094
__metaclass__ = AlternateDBusNamesMetaclass
2095
mandos_dbus_service = MandosDBusServiceTransitional()
2096
3439
3440
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3441
out_signature="a{oa{sa{sv}}}")
3442
def GetManagedObjects(self):
3443
"""D-Bus method"""
3444
return dbus.Dictionary(
3445
{client.dbus_object_path:
3446
dbus.Dictionary(
3447
{interface: client.GetAll(interface)
3448
for interface in
3449
client._get_all_interface_names()})
3450
for client in tcp_server.clients.values()})
3451
3452
def client_added_signal(self, client):
3453
"""Send the new standard signal and the old signal"""
3454
if use_dbus:
3455
# New standard signal
3456
self.InterfacesAdded(
3457
client.dbus_object_path,
3458
dbus.Dictionary(
3459
{interface: client.GetAll(interface)
3460
for interface in
3461
client._get_all_interface_names()}))
3462
# Old signal
3463
self.ClientAdded(client.dbus_object_path)
3464
3465
def client_removed_signal(self, client):
3466
"""Send the new standard signal and the old signal"""
3467
if use_dbus:
3468
# New standard signal
3469
self.InterfacesRemoved(
3470
client.dbus_object_path,
3471
client._get_all_interface_names())
3472
# Old signal
3473
self.ClientRemoved(client.dbus_object_path,
3474
client.name)
3475
3476
mandos_dbus_service = MandosDBusService()
3477
3478
# Save modules to variables to exempt the modules from being
3479
# unloaded before the function registered with atexit() is run.
3480
mp = multiprocessing
3481
wn = wnull
3482
2097
3483
def cleanup():
2098
3484
"Cleanup function; run on exit"
2099
service.cleanup()
2100
3485
if zeroconf:
3486
service.cleanup()
3487
3488
mp.active_children()
3489
wn.close()
3490
if not (tcp_server.clients or client_settings):
3491
return
3492
3493
# Store client before exiting. Secrets are encrypted with key
3494
# based on what config file has. If config file is
3495
# removed/edited, old secret will thus be unrecovable.
3496
clients = {}
3497
with PGPEngine() as pgp:
3498
for client in tcp_server.clients.values():
3499
key = client_settings[client.name]["secret"]
3500
client.encrypted_secret = pgp.encrypt(client.secret,
3501
key)
3502
client_dict = {}
3503
3504
# A list of attributes that can not be pickled
3505
# + secret.
3506
exclude = {"bus", "changedstate", "secret",
3507
"checker", "server_settings"}
3508
for name, typ in inspect.getmembers(dbus.service
3509
.Object):
3510
exclude.add(name)
3511
3512
client_dict["encrypted_secret"] = (client
3513
.encrypted_secret)
3514
for attr in client.client_structure:
3515
if attr not in exclude:
3516
client_dict[attr] = getattr(client, attr)
3517
3518
clients[client.name] = client_dict
3519
del client_settings[client.name]["secret"]
3520
3521
try:
3522
with tempfile.NamedTemporaryFile(
3523
mode='wb',
3524
suffix=".pickle",
3525
prefix='clients-',
3526
dir=os.path.dirname(stored_state_path),
3527
delete=False) as stored_state:
3528
pickle.dump((clients, client_settings), stored_state,
3529
protocol=2)
3530
tempname = stored_state.name
3531
os.rename(tempname, stored_state_path)
3532
except (IOError, OSError) as e:
3533
if not debug:
3534
try:
3535
os.remove(tempname)
3536
except NameError:
3537
pass
3538
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
3539
logger.warning("Could not save persistent state: {}"
3540
.format(os.strerror(e.errno)))
3541
else:
3542
logger.warning("Could not save persistent state:",
3543
exc_info=e)
3544
raise
3545
3546
# Delete all clients, and settings from config
2101
3547
while tcp_server.clients:
2102
client = tcp_server.clients.pop()
3548
name, client = tcp_server.clients.popitem()
2103
3549
if use_dbus:
2104
3550
client.remove_from_connection()
2105
client.disable_hook = None
2106
# Don't signal anything except ClientRemoved
3551
# Don't signal the disabling
2107
3552
client.disable(quiet=True)
3553
# Emit D-Bus signal for removal
2108
3554
if use_dbus:
2109
# Emit D-Bus signal
2110
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
2111
client.name)
2112
3555
mandos_dbus_service.client_removed_signal(client)
3556
client_settings.clear()
3557
2113
3558
atexit.register(cleanup)
2114
2115
for client in tcp_server.clients:
3559
3560
for client in tcp_server.clients.values():
2116
3561
if use_dbus:
2117
# Emit D-Bus signal
2118
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2119
client.enable()
2120
3562
# Emit D-Bus signal for adding
3563
mandos_dbus_service.client_added_signal(client)
3564
# Need to initiate checking of clients
3565
if client.enabled:
3566
client.init_checker()
3567
2121
3568
tcp_server.enable()
2122
3569
tcp_server.server_activate()
2123
3570
2124
3571
# Find out what port we got
2125
service.port = tcp_server.socket.getsockname()[1]
3572
if zeroconf:
3573
service.port = tcp_server.socket.getsockname()[1]
2126
3574
if use_ipv6:
2127
3575
logger.info("Now listening on address %r, port %d,"
2128
" flowinfo %d, scope_id %d"
2129
% tcp_server.socket.getsockname())
3576
" flowinfo %d, scope_id %d",
3577
*tcp_server.socket.getsockname())
2130
3578
else: # IPv4
2131
logger.info("Now listening on address %r, port %d"
2132
% tcp_server.socket.getsockname())
2133
2134
#service.interface = tcp_server.socket.getsockname()[3]
2135
3579
logger.info("Now listening on address %r, port %d",
3580
*tcp_server.socket.getsockname())
3581
3582
# service.interface = tcp_server.socket.getsockname()[3]
3583
2136
3584
try:
2137
# From the Avahi example code
2138
try:
2139
service.activate()
2140
except dbus.exceptions.DBusException as error:
2141
logger.critical("DBusException: %s", error)
2142
cleanup()
2143
sys.exit(1)
2144
# End of Avahi example code
2145
2146
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2147
lambda *args, **kwargs:
2148
(tcp_server.handle_request
2149
(*args[2:], **kwargs) or True))
2150
3585
if zeroconf:
3586
# From the Avahi example code
3587
try:
3588
service.activate()
3589
except dbus.exceptions.DBusException as error:
3590
logger.critical("D-Bus Exception", exc_info=error)
3591
cleanup()
3592
sys.exit(1)
3593
# End of Avahi example code
3594
3595
GLib.io_add_watch(tcp_server.fileno(), GLib.IO_IN,
3596
lambda *args, **kwargs:
3597
(tcp_server.handle_request
3598
(*args[2:], **kwargs) or True))
3599
2151
3600
logger.debug("Starting main loop")
2152
3601
main_loop.run()
2153
3602
except AvahiError as error:
2154
logger.critical("AvahiError: %s", error)
3603
logger.critical("Avahi Error", exc_info=error)
2155
3604
cleanup()
2156
3605
sys.exit(1)
2157
3606
except KeyboardInterrupt:
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0