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- Committer: Teddy Hogeborn
- Date: 2019-02-11 06:14:29 UTC
- Revision ID: teddy@recompile.se-20190211061429-n6n5zk29iatshlb3
Fix Debian package dependencies
* debian/control (Build-Depends): Changed GnuTLS dependencies to
"libgnutls30 (>= 3.3.0),
libgnutls28-dev (>= 3.6.6) |
libgnutls28-dev (<< 3.6.0)". (We
can't depend on the virtual package
"gnutls-dev", since we need the
version restrictions.)
(Package: mandos/Depends): Remove dependency on libgnutls28-dev
package.
(Package: mandos/Suggests): New; set to "libc6-dev,
c-compiler". (Used to find value of
"SO_BINDTODEVICE").
(Package: mandos-client/Depends): Don't depend on openssl anymore;
instead depend on either a
gnutls-bin (>= 3.6.6) (in which
case TLS key generation will
work), or on libgnutls30 (<<
3.6.0) (in which case TLS key
generation will not be needed).
* debian/control (Build-Depends): Changed GnuTLS dependencies to
"libgnutls30 (>= 3.3.0),
libgnutls28-dev (>= 3.6.6) |
libgnutls28-dev (<< 3.6.0)". (We
can't depend on the virtual package
"gnutls-dev", since we need the
version restrictions.)
(Package: mandos/Depends): Remove dependency on libgnutls28-dev
package.
(Package: mandos/Suggests): New; set to "libc6-dev,
c-compiler". (Used to find value of
"SO_BINDTODEVICE").
(Package: mandos-client/Depends): Don't depend on openssl anymore;
instead depend on either a
gnutls-bin (>= 3.6.6) (in which
case TLS key generation will
work), or on libgnutls30 (<<
3.6.0) (in which case TLS key
generation will not be needed).
- files added:
- bugs.xml
- debian/upstream
- plugin-helpers
- files removed:
- initramfs-tools-hook-conf
- files modified:
- DBUS-API
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 © 2008-2012 Teddy Hogeborn
15
# Copyright © 2008-2012 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
from future_builtins import *
38
try:
39
from future_builtins import *
40
except ImportError:
41
pass
38
42
39
import SocketServer as socketserver
43
try:
44
import SocketServer as socketserver
45
except ImportError:
46
import socketserver
40
47
import socket
41
48
import argparse
42
49
import datetime
43
50
import errno
44
import gnutls.crypto
45
import gnutls.connection
46
import gnutls.errors
47
import gnutls.library.functions
48
import gnutls.library.constants
49
import gnutls.library.types
50
import ConfigParser as configparser
51
try:
52
import ConfigParser as configparser
53
except ImportError:
54
import configparser
51
55
import sys
52
56
import re
53
57
import os
62
66
import struct
63
67
import fcntl
64
68
import functools
65
import cPickle as pickle
69
try:
70
import cPickle as pickle
71
except ImportError:
72
import pickle
66
73
import multiprocessing
67
74
import types
68
75
import binascii
69
76
import tempfile
70
77
import itertools
78
import collections
79
import codecs
71
80
72
81
import dbus
73
82
import dbus.service
74
import gobject
75
import avahi
83
from gi.repository import GLib
76
84
from dbus.mainloop.glib import DBusGMainLoop
77
85
import ctypes
78
86
import ctypes.util
79
87
import xml.dom.minidom
80
88
import inspect
81
import GnuPGInterface
82
89
90
# Try to find the value of SO_BINDTODEVICE:
83
91
try:
92
# This is where SO_BINDTODEVICE is in Python 3.3 (or 3.4?) and
93
# newer, and it is also the most natural place for it:
84
94
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
85
95
except AttributeError:
86
96
try:
97
# This is where SO_BINDTODEVICE was up to and including Python
98
# 2.6, and also 3.2:
87
99
from IN import SO_BINDTODEVICE
88
100
except ImportError:
89
SO_BINDTODEVICE = None
90
91
version = "1.5.5"
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 = "1.8.2"
92
119
stored_state_file = "clients.pickle"
93
120
94
121
logger = logging.getLogger()
95
syslogger = (logging.handlers.SysLogHandler
96
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
97
address = str("/dev/log")))
122
syslogger = None
98
123
99
124
try:
100
if_nametoindex = (ctypes.cdll.LoadLibrary
101
(ctypes.util.find_library("c"))
102
.if_nametoindex)
125
if_nametoindex = ctypes.cdll.LoadLibrary(
126
ctypes.util.find_library("c")).if_nametoindex
103
127
except (OSError, AttributeError):
128
104
129
def if_nametoindex(interface):
105
130
"Get an interface index the hard way, i.e. using fcntl()"
106
131
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
107
132
with contextlib.closing(socket.socket()) as s:
108
133
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
109
struct.pack(str("16s16x"),
110
interface))
111
interface_index = struct.unpack(str("I"),
112
ifreq[16:20])[0]
134
struct.pack(b"16s16x", interface))
135
interface_index = struct.unpack("I", ifreq[16:20])[0]
113
136
return interface_index
114
137
115
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
116
155
def initlogger(debug, level=logging.WARNING):
117
156
"""init logger and add loglevel"""
118
157
158
global syslogger
159
syslogger = (logging.handlers.SysLogHandler(
160
facility=logging.handlers.SysLogHandler.LOG_DAEMON,
161
address="/dev/log"))
119
162
syslogger.setFormatter(logging.Formatter
120
163
('Mandos [%(process)d]: %(levelname)s:'
121
164
' %(message)s'))
122
165
logger.addHandler(syslogger)
123
166
124
167
if debug:
125
168
console = logging.StreamHandler()
126
169
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
138
181
139
182
class PGPEngine(object):
140
183
"""A simple class for OpenPGP symmetric encryption & decryption"""
184
141
185
def __init__(self):
142
self.gnupg = GnuPGInterface.GnuPG()
143
186
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
144
self.gnupg = GnuPGInterface.GnuPG()
145
self.gnupg.options.meta_interactive = False
146
self.gnupg.options.homedir = self.tempdir
147
self.gnupg.options.extra_args.extend(['--force-mdc',
148
'--quiet',
149
'--no-use-agent'])
150
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
151
206
def __enter__(self):
152
207
return self
153
208
154
209
def __exit__(self, exc_type, exc_value, traceback):
155
210
self._cleanup()
156
211
return False
157
212
158
213
def __del__(self):
159
214
self._cleanup()
160
215
161
216
def _cleanup(self):
162
217
if self.tempdir is not None:
163
218
# Delete contents of tempdir
164
219
for root, dirs, files in os.walk(self.tempdir,
165
topdown = False):
220
topdown=False):
166
221
for filename in files:
167
222
os.remove(os.path.join(root, filename))
168
223
for dirname in dirs:
170
225
# Remove tempdir
171
226
os.rmdir(self.tempdir)
172
227
self.tempdir = None
173
228
174
229
def password_encode(self, password):
175
230
# Passphrase can not be empty and can not contain newlines or
176
231
# NUL bytes. So we prefix it and hex encode it.
177
return b"mandos" + binascii.hexlify(password)
178
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
179
240
def encrypt(self, data, password):
180
self.gnupg.passphrase = self.password_encode(password)
181
with open(os.devnull, "w") as devnull:
182
try:
183
proc = self.gnupg.run(['--symmetric'],
184
create_fhs=['stdin', 'stdout'],
185
attach_fhs={'stderr': devnull})
186
with contextlib.closing(proc.handles['stdin']) as f:
187
f.write(data)
188
with contextlib.closing(proc.handles['stdout']) as f:
189
ciphertext = f.read()
190
proc.wait()
191
except IOError as e:
192
raise PGPError(e)
193
self.gnupg.passphrase = None
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)
194
256
return ciphertext
195
257
196
258
def decrypt(self, data, password):
197
self.gnupg.passphrase = self.password_encode(password)
198
with open(os.devnull, "w") as devnull:
199
try:
200
proc = self.gnupg.run(['--decrypt'],
201
create_fhs=['stdin', 'stdout'],
202
attach_fhs={'stderr': devnull})
203
with contextlib.closing(proc.handles['stdin']) as f:
204
f.write(data)
205
with contextlib.closing(proc.handles['stdout']) as f:
206
decrypted_plaintext = f.read()
207
proc.wait()
208
except IOError as e:
209
raise PGPError(e)
210
self.gnupg.passphrase = None
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)
211
274
return decrypted_plaintext
212
275
213
276
277
# Pretend that we have an Avahi module
278
class Avahi(object):
279
"""This isn't so much a class as it is a module-like namespace.
280
It is instantiated once, and simulates having an Avahi module."""
281
IF_UNSPEC = -1 # avahi-common/address.h
282
PROTO_UNSPEC = -1 # avahi-common/address.h
283
PROTO_INET = 0 # avahi-common/address.h
284
PROTO_INET6 = 1 # avahi-common/address.h
285
DBUS_NAME = "org.freedesktop.Avahi"
286
DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"
287
DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"
288
DBUS_PATH_SERVER = "/"
289
290
def string_array_to_txt_array(self, t):
291
return dbus.Array((dbus.ByteArray(s.encode("utf-8"))
292
for s in t), signature="ay")
293
ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h
294
ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h
295
ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h
296
SERVER_INVALID = 0 # avahi-common/defs.h
297
SERVER_REGISTERING = 1 # avahi-common/defs.h
298
SERVER_RUNNING = 2 # avahi-common/defs.h
299
SERVER_COLLISION = 3 # avahi-common/defs.h
300
SERVER_FAILURE = 4 # avahi-common/defs.h
301
avahi = Avahi()
302
303
214
304
class AvahiError(Exception):
215
305
def __init__(self, value, *args, **kwargs):
216
306
self.value = value
217
super(AvahiError, self).__init__(value, *args, **kwargs)
218
def __unicode__(self):
219
return unicode(repr(self.value))
307
return super(AvahiError, self).__init__(value, *args,
308
**kwargs)
309
220
310
221
311
class AvahiServiceError(AvahiError):
222
312
pass
223
313
314
224
315
class AvahiGroupError(AvahiError):
225
316
pass
226
317
227
318
228
319
class AvahiService(object):
229
320
"""An Avahi (Zeroconf) service.
230
321
231
322
Attributes:
232
323
interface: integer; avahi.IF_UNSPEC or an interface index.
233
324
Used to optionally bind to the specified interface.
234
325
name: string; Example: 'Mandos'
235
326
type: string; Example: '_mandos._tcp'.
236
See <http://www.dns-sd.org/ServiceTypes.html>
327
See <https://www.iana.org/assignments/service-names-port-numbers>
237
328
port: integer; what port to announce
238
329
TXT: list of strings; TXT record for the service
239
330
domain: string; Domain to publish on, default to .local if empty.
245
336
server: D-Bus Server
246
337
bus: dbus.SystemBus()
247
338
"""
248
249
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
250
servicetype = None, port = None, TXT = None,
251
domain = "", host = "", max_renames = 32768,
252
protocol = avahi.PROTO_UNSPEC, bus = None):
339
340
def __init__(self,
341
interface=avahi.IF_UNSPEC,
342
name=None,
343
servicetype=None,
344
port=None,
345
TXT=None,
346
domain="",
347
host="",
348
max_renames=32768,
349
protocol=avahi.PROTO_UNSPEC,
350
bus=None):
253
351
self.interface = interface
254
352
self.name = name
255
353
self.type = servicetype
264
362
self.server = None
265
363
self.bus = bus
266
364
self.entry_group_state_changed_match = None
267
268
def rename(self):
365
366
def rename(self, remove=True):
269
367
"""Derived from the Avahi example code"""
270
368
if self.rename_count >= self.max_renames:
271
369
logger.critical("No suitable Zeroconf service name found"
272
370
" after %i retries, exiting.",
273
371
self.rename_count)
274
372
raise AvahiServiceError("Too many renames")
275
self.name = unicode(self.server
276
.GetAlternativeServiceName(self.name))
373
self.name = str(
374
self.server.GetAlternativeServiceName(self.name))
375
self.rename_count += 1
277
376
logger.info("Changing Zeroconf service name to %r ...",
278
377
self.name)
279
self.remove()
378
if remove:
379
self.remove()
280
380
try:
281
381
self.add()
282
382
except dbus.exceptions.DBusException as error:
283
logger.critical("D-Bus Exception", exc_info=error)
284
self.cleanup()
285
os._exit(1)
286
self.rename_count += 1
287
383
if (error.get_dbus_name()
384
== "org.freedesktop.Avahi.CollisionError"):
385
logger.info("Local Zeroconf service name collision.")
386
return self.rename(remove=False)
387
else:
388
logger.critical("D-Bus Exception", exc_info=error)
389
self.cleanup()
390
os._exit(1)
391
288
392
def remove(self):
289
393
"""Derived from the Avahi example code"""
290
394
if self.entry_group_state_changed_match is not None:
292
396
self.entry_group_state_changed_match = None
293
397
if self.group is not None:
294
398
self.group.Reset()
295
399
296
400
def add(self):
297
401
"""Derived from the Avahi example code"""
298
402
self.remove()
315
419
dbus.UInt16(self.port),
316
420
avahi.string_array_to_txt_array(self.TXT))
317
421
self.group.Commit()
318
422
319
423
def entry_group_state_changed(self, state, error):
320
424
"""Derived from the Avahi example code"""
321
425
logger.debug("Avahi entry group state change: %i", state)
322
426
323
427
if state == avahi.ENTRY_GROUP_ESTABLISHED:
324
428
logger.debug("Zeroconf service established.")
325
429
elif state == avahi.ENTRY_GROUP_COLLISION:
327
431
self.rename()
328
432
elif state == avahi.ENTRY_GROUP_FAILURE:
329
433
logger.critical("Avahi: Error in group state changed %s",
330
unicode(error))
331
raise AvahiGroupError("State changed: {0!s}"
332
.format(error))
333
434
str(error))
435
raise AvahiGroupError("State changed: {!s}".format(error))
436
334
437
def cleanup(self):
335
438
"""Derived from the Avahi example code"""
336
439
if self.group is not None:
341
444
pass
342
445
self.group = None
343
446
self.remove()
344
447
345
448
def server_state_changed(self, state, error=None):
346
449
"""Derived from the Avahi example code"""
347
450
logger.debug("Avahi server state change: %i", state)
348
bad_states = { avahi.SERVER_INVALID:
349
"Zeroconf server invalid",
350
avahi.SERVER_REGISTERING: None,
351
avahi.SERVER_COLLISION:
352
"Zeroconf server name collision",
353
avahi.SERVER_FAILURE:
354
"Zeroconf server failure" }
451
bad_states = {
452
avahi.SERVER_INVALID: "Zeroconf server invalid",
453
avahi.SERVER_REGISTERING: None,
454
avahi.SERVER_COLLISION: "Zeroconf server name collision",
455
avahi.SERVER_FAILURE: "Zeroconf server failure",
456
}
355
457
if state in bad_states:
356
458
if bad_states[state] is not None:
357
459
if error is None:
360
462
logger.error(bad_states[state] + ": %r", error)
361
463
self.cleanup()
362
464
elif state == avahi.SERVER_RUNNING:
363
self.add()
465
try:
466
self.add()
467
except dbus.exceptions.DBusException as error:
468
if (error.get_dbus_name()
469
== "org.freedesktop.Avahi.CollisionError"):
470
logger.info("Local Zeroconf service name"
471
" collision.")
472
return self.rename(remove=False)
473
else:
474
logger.critical("D-Bus Exception", exc_info=error)
475
self.cleanup()
476
os._exit(1)
364
477
else:
365
478
if error is None:
366
479
logger.debug("Unknown state: %r", state)
367
480
else:
368
481
logger.debug("Unknown state: %r: %r", state, error)
369
482
370
483
def activate(self):
371
484
"""Derived from the Avahi example code"""
372
485
if self.server is None:
376
489
follow_name_owner_changes=True),
377
490
avahi.DBUS_INTERFACE_SERVER)
378
491
self.server.connect_to_signal("StateChanged",
379
self.server_state_changed)
492
self.server_state_changed)
380
493
self.server_state_changed(self.server.GetState())
381
494
382
495
383
496
class AvahiServiceToSyslog(AvahiService):
384
def rename(self):
497
def rename(self, *args, **kwargs):
385
498
"""Add the new name to the syslog messages"""
386
ret = AvahiService.rename(self)
387
syslogger.setFormatter(logging.Formatter
388
('Mandos ({0}) [%(process)d]:'
389
' %(levelname)s: %(message)s'
390
.format(self.name)))
499
ret = super(AvahiServiceToSyslog, self).rename(*args, **kwargs)
500
syslogger.setFormatter(logging.Formatter(
501
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
502
.format(self.name)))
391
503
return ret
392
504
393
505
394
def timedelta_to_milliseconds(td):
395
"Convert a datetime.timedelta() to milliseconds"
396
return ((td.days * 24 * 60 * 60 * 1000)
397
+ (td.seconds * 1000)
398
+ (td.microseconds // 1000))
506
# Pretend that we have a GnuTLS module
507
class GnuTLS(object):
508
"""This isn't so much a class as it is a module-like namespace.
509
It is instantiated once, and simulates having a GnuTLS module."""
510
511
library = ctypes.util.find_library("gnutls")
512
if library is None:
513
library = ctypes.util.find_library("gnutls-deb0")
514
_library = ctypes.cdll.LoadLibrary(library)
515
del library
516
_need_version = b"3.3.0"
517
_tls_rawpk_version = b"3.6.6"
518
519
def __init__(self):
520
# Need to use "self" here, since this method is called before
521
# the assignment to the "gnutls" global variable happens.
522
if self.check_version(self._need_version) is None:
523
raise self.Error("Needs GnuTLS {} or later"
524
.format(self._need_version))
525
526
# Unless otherwise indicated, the constants and types below are
527
# all from the gnutls/gnutls.h C header file.
528
529
# Constants
530
E_SUCCESS = 0
531
E_INTERRUPTED = -52
532
E_AGAIN = -28
533
CRT_OPENPGP = 2
534
CRT_RAWPK = 3
535
CLIENT = 2
536
SHUT_RDWR = 0
537
CRD_CERTIFICATE = 1
538
E_NO_CERTIFICATE_FOUND = -49
539
X509_FMT_DER = 0
540
NO_TICKETS = 1<<10
541
ENABLE_RAWPK = 1<<18
542
CTYPE_PEERS = 3
543
KEYID_USE_SHA256 = 1 # gnutls/x509.h
544
OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
545
546
# Types
547
class session_int(ctypes.Structure):
548
_fields_ = []
549
session_t = ctypes.POINTER(session_int)
550
551
class certificate_credentials_st(ctypes.Structure):
552
_fields_ = []
553
certificate_credentials_t = ctypes.POINTER(
554
certificate_credentials_st)
555
certificate_type_t = ctypes.c_int
556
557
class datum_t(ctypes.Structure):
558
_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
559
('size', ctypes.c_uint)]
560
561
class openpgp_crt_int(ctypes.Structure):
562
_fields_ = []
563
openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
564
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
565
log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
566
credentials_type_t = ctypes.c_int
567
transport_ptr_t = ctypes.c_void_p
568
close_request_t = ctypes.c_int
569
570
# Exceptions
571
class Error(Exception):
572
# We need to use the class name "GnuTLS" here, since this
573
# exception might be raised from within GnuTLS.__init__,
574
# which is called before the assignment to the "gnutls"
575
# global variable has happened.
576
def __init__(self, message=None, code=None, args=()):
577
# Default usage is by a message string, but if a return
578
# code is passed, convert it to a string with
579
# gnutls.strerror()
580
self.code = code
581
if message is None and code is not None:
582
message = GnuTLS.strerror(code)
583
return super(GnuTLS.Error, self).__init__(
584
message, *args)
585
586
class CertificateSecurityError(Error):
587
pass
588
589
# Classes
590
class Credentials(object):
591
def __init__(self):
592
self._c_object = gnutls.certificate_credentials_t()
593
gnutls.certificate_allocate_credentials(
594
ctypes.byref(self._c_object))
595
self.type = gnutls.CRD_CERTIFICATE
596
597
def __del__(self):
598
gnutls.certificate_free_credentials(self._c_object)
599
600
class ClientSession(object):
601
def __init__(self, socket, credentials=None):
602
self._c_object = gnutls.session_t()
603
gnutls_flags = gnutls.CLIENT
604
if gnutls.check_version("3.5.6"):
605
gnutls_flags |= gnutls.NO_TICKETS
606
if gnutls.has_rawpk:
607
gnutls_flags |= gnutls.ENABLE_RAWPK
608
gnutls.init(ctypes.byref(self._c_object), gnutls_flags)
609
del gnutls_flags
610
gnutls.set_default_priority(self._c_object)
611
gnutls.transport_set_ptr(self._c_object, socket.fileno())
612
gnutls.handshake_set_private_extensions(self._c_object,
613
True)
614
self.socket = socket
615
if credentials is None:
616
credentials = gnutls.Credentials()
617
gnutls.credentials_set(self._c_object, credentials.type,
618
ctypes.cast(credentials._c_object,
619
ctypes.c_void_p))
620
self.credentials = credentials
621
622
def __del__(self):
623
gnutls.deinit(self._c_object)
624
625
def handshake(self):
626
return gnutls.handshake(self._c_object)
627
628
def send(self, data):
629
data = bytes(data)
630
data_len = len(data)
631
while data_len > 0:
632
data_len -= gnutls.record_send(self._c_object,
633
data[-data_len:],
634
data_len)
635
636
def bye(self):
637
return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
638
639
# Error handling functions
640
def _error_code(result):
641
"""A function to raise exceptions on errors, suitable
642
for the 'restype' attribute on ctypes functions"""
643
if result >= 0:
644
return result
645
if result == gnutls.E_NO_CERTIFICATE_FOUND:
646
raise gnutls.CertificateSecurityError(code=result)
647
raise gnutls.Error(code=result)
648
649
def _retry_on_error(result, func, arguments):
650
"""A function to retry on some errors, suitable
651
for the 'errcheck' attribute on ctypes functions"""
652
while result < 0:
653
if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
654
return _error_code(result)
655
result = func(*arguments)
656
return result
657
658
# Unless otherwise indicated, the function declarations below are
659
# all from the gnutls/gnutls.h C header file.
660
661
# Functions
662
priority_set_direct = _library.gnutls_priority_set_direct
663
priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
664
ctypes.POINTER(ctypes.c_char_p)]
665
priority_set_direct.restype = _error_code
666
667
init = _library.gnutls_init
668
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
669
init.restype = _error_code
670
671
set_default_priority = _library.gnutls_set_default_priority
672
set_default_priority.argtypes = [session_t]
673
set_default_priority.restype = _error_code
674
675
record_send = _library.gnutls_record_send
676
record_send.argtypes = [session_t, ctypes.c_void_p,
677
ctypes.c_size_t]
678
record_send.restype = ctypes.c_ssize_t
679
record_send.errcheck = _retry_on_error
680
681
certificate_allocate_credentials = (
682
_library.gnutls_certificate_allocate_credentials)
683
certificate_allocate_credentials.argtypes = [
684
ctypes.POINTER(certificate_credentials_t)]
685
certificate_allocate_credentials.restype = _error_code
686
687
certificate_free_credentials = (
688
_library.gnutls_certificate_free_credentials)
689
certificate_free_credentials.argtypes = [
690
certificate_credentials_t]
691
certificate_free_credentials.restype = None
692
693
handshake_set_private_extensions = (
694
_library.gnutls_handshake_set_private_extensions)
695
handshake_set_private_extensions.argtypes = [session_t,
696
ctypes.c_int]
697
handshake_set_private_extensions.restype = None
698
699
credentials_set = _library.gnutls_credentials_set
700
credentials_set.argtypes = [session_t, credentials_type_t,
701
ctypes.c_void_p]
702
credentials_set.restype = _error_code
703
704
strerror = _library.gnutls_strerror
705
strerror.argtypes = [ctypes.c_int]
706
strerror.restype = ctypes.c_char_p
707
708
certificate_type_get = _library.gnutls_certificate_type_get
709
certificate_type_get.argtypes = [session_t]
710
certificate_type_get.restype = _error_code
711
712
certificate_get_peers = _library.gnutls_certificate_get_peers
713
certificate_get_peers.argtypes = [session_t,
714
ctypes.POINTER(ctypes.c_uint)]
715
certificate_get_peers.restype = ctypes.POINTER(datum_t)
716
717
global_set_log_level = _library.gnutls_global_set_log_level
718
global_set_log_level.argtypes = [ctypes.c_int]
719
global_set_log_level.restype = None
720
721
global_set_log_function = _library.gnutls_global_set_log_function
722
global_set_log_function.argtypes = [log_func]
723
global_set_log_function.restype = None
724
725
deinit = _library.gnutls_deinit
726
deinit.argtypes = [session_t]
727
deinit.restype = None
728
729
handshake = _library.gnutls_handshake
730
handshake.argtypes = [session_t]
731
handshake.restype = _error_code
732
handshake.errcheck = _retry_on_error
733
734
transport_set_ptr = _library.gnutls_transport_set_ptr
735
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
736
transport_set_ptr.restype = None
737
738
bye = _library.gnutls_bye
739
bye.argtypes = [session_t, close_request_t]
740
bye.restype = _error_code
741
bye.errcheck = _retry_on_error
742
743
check_version = _library.gnutls_check_version
744
check_version.argtypes = [ctypes.c_char_p]
745
check_version.restype = ctypes.c_char_p
746
747
has_rawpk = bool(check_version(_tls_rawpk_version))
748
749
if has_rawpk:
750
# Types
751
class pubkey_st(ctypes.Structure):
752
_fields = []
753
pubkey_t = ctypes.POINTER(pubkey_st)
754
755
x509_crt_fmt_t = ctypes.c_int
756
757
# All the function declarations below are from gnutls/abstract.h
758
pubkey_init = _library.gnutls_pubkey_init
759
pubkey_init.argtypes = [ctypes.POINTER(pubkey_t)]
760
pubkey_init.restype = _error_code
761
762
pubkey_import = _library.gnutls_pubkey_import
763
pubkey_import.argtypes = [pubkey_t, ctypes.POINTER(datum_t),
764
x509_crt_fmt_t]
765
pubkey_import.restype = _error_code
766
767
pubkey_get_key_id = _library.gnutls_pubkey_get_key_id
768
pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,
769
ctypes.POINTER(ctypes.c_ubyte),
770
ctypes.POINTER(ctypes.c_size_t)]
771
pubkey_get_key_id.restype = _error_code
772
773
pubkey_deinit = _library.gnutls_pubkey_deinit
774
pubkey_deinit.argtypes = [pubkey_t]
775
pubkey_deinit.restype = None
776
else:
777
# All the function declarations below are from gnutls/openpgp.h
778
779
openpgp_crt_init = _library.gnutls_openpgp_crt_init
780
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
781
openpgp_crt_init.restype = _error_code
782
783
openpgp_crt_import = _library.gnutls_openpgp_crt_import
784
openpgp_crt_import.argtypes = [openpgp_crt_t,
785
ctypes.POINTER(datum_t),
786
openpgp_crt_fmt_t]
787
openpgp_crt_import.restype = _error_code
788
789
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
790
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
791
ctypes.POINTER(ctypes.c_uint)]
792
openpgp_crt_verify_self.restype = _error_code
793
794
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
795
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
796
openpgp_crt_deinit.restype = None
797
798
openpgp_crt_get_fingerprint = (
799
_library.gnutls_openpgp_crt_get_fingerprint)
800
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
801
ctypes.c_void_p,
802
ctypes.POINTER(
803
ctypes.c_size_t)]
804
openpgp_crt_get_fingerprint.restype = _error_code
805
806
if check_version("3.6.4"):
807
certificate_type_get2 = _library.gnutls_certificate_type_get2
808
certificate_type_get2.argtypes = [session_t, ctypes.c_int]
809
certificate_type_get2.restype = _error_code
810
811
# Remove non-public functions
812
del _error_code, _retry_on_error
813
# Create the global "gnutls" object, simulating a module
814
gnutls = GnuTLS()
815
816
817
def call_pipe(connection, # : multiprocessing.Connection
818
func, *args, **kwargs):
819
"""This function is meant to be called by multiprocessing.Process
820
821
This function runs func(*args, **kwargs), and writes the resulting
822
return value on the provided multiprocessing.Connection.
823
"""
824
connection.send(func(*args, **kwargs))
825
connection.close()
399
826
400
827
401
828
class Client(object):
402
829
"""A representation of a client host served by this server.
403
830
404
831
Attributes:
405
832
approved: bool(); 'None' if not yet approved/disapproved
406
833
approval_delay: datetime.timedelta(); Time to wait for approval
408
835
checker: subprocess.Popen(); a running checker process used
409
836
to see if the client lives.
410
837
'None' if no process is running.
411
checker_callback_tag: a gobject event source tag, or None
838
checker_callback_tag: a GLib event source tag, or None
412
839
checker_command: string; External command which is run to check
413
840
if client lives. %() expansions are done at
414
841
runtime with vars(self) as dict, so that for
415
842
instance %(name)s can be used in the command.
416
checker_initiator_tag: a gobject event source tag, or None
843
checker_initiator_tag: a GLib event source tag, or None
417
844
created: datetime.datetime(); (UTC) object creation
418
845
client_structure: Object describing what attributes a client has
419
846
and is used for storing the client at exit
420
847
current_checker_command: string; current running checker_command
421
disable_initiator_tag: a gobject event source tag, or None
848
disable_initiator_tag: a GLib event source tag, or None
422
849
enabled: bool()
423
850
fingerprint: string (40 or 32 hexadecimal digits); used to
424
uniquely identify the client
851
uniquely identify an OpenPGP client
852
key_id: string (64 hexadecimal digits); used to uniquely identify
853
a client using raw public keys
425
854
host: string; available for use by the checker command
426
855
interval: datetime.timedelta(); How often to start a new checker
427
856
last_approval_request: datetime.datetime(); (UTC) or None
429
858
last_checker_status: integer between 0 and 255 reflecting exit
430
859
status of last checker. -1 reflects crashed
431
860
checker, -2 means no checker completed yet.
861
last_checker_signal: The signal which killed the last checker, if
862
last_checker_status is -1
432
863
last_enabled: datetime.datetime(); (UTC) or None
433
864
name: string; from the config file, used in log messages and
434
865
D-Bus identifiers
439
870
runtime_expansions: Allowed attributes for runtime expansion.
440
871
expires: datetime.datetime(); time (UTC) when a client will be
441
872
disabled, or None
873
server_settings: The server_settings dict from main()
442
874
"""
443
875
444
876
runtime_expansions = ("approval_delay", "approval_duration",
445
"created", "enabled", "expires",
877
"created", "enabled", "expires", "key_id",
446
878
"fingerprint", "host", "interval",
447
879
"last_approval_request", "last_checked_ok",
448
880
"last_enabled", "name", "timeout")
449
client_defaults = { "timeout": "5m",
450
"extended_timeout": "15m",
451
"interval": "2m",
452
"checker": "fping -q -- %%(host)s",
453
"host": "",
454
"approval_delay": "0s",
455
"approval_duration": "1s",
456
"approved_by_default": "True",
457
"enabled": "True",
458
}
459
460
def timeout_milliseconds(self):
461
"Return the 'timeout' attribute in milliseconds"
462
return timedelta_to_milliseconds(self.timeout)
463
464
def extended_timeout_milliseconds(self):
465
"Return the 'extended_timeout' attribute in milliseconds"
466
return timedelta_to_milliseconds(self.extended_timeout)
467
468
def interval_milliseconds(self):
469
"Return the 'interval' attribute in milliseconds"
470
return timedelta_to_milliseconds(self.interval)
471
472
def approval_delay_milliseconds(self):
473
return timedelta_to_milliseconds(self.approval_delay)
474
881
client_defaults = {
882
"timeout": "PT5M",
883
"extended_timeout": "PT15M",
884
"interval": "PT2M",
885
"checker": "fping -q -- %%(host)s",
886
"host": "",
887
"approval_delay": "PT0S",
888
"approval_duration": "PT1S",
889
"approved_by_default": "True",
890
"enabled": "True",
891
}
892
475
893
@staticmethod
476
894
def config_parser(config):
477
895
"""Construct a new dict of client settings of this form:
484
902
for client_name in config.sections():
485
903
section = dict(config.items(client_name))
486
904
client = settings[client_name] = {}
487
905
488
906
client["host"] = section["host"]
489
907
# Reformat values from string types to Python types
490
908
client["approved_by_default"] = config.getboolean(
491
909
client_name, "approved_by_default")
492
910
client["enabled"] = config.getboolean(client_name,
493
911
"enabled")
494
912
913
# Uppercase and remove spaces from key_id and fingerprint
914
# for later comparison purposes with return value from the
915
# key_id() and fingerprint() functions
916
client["key_id"] = (section.get("key_id", "").upper()
917
.replace(" ", ""))
495
918
client["fingerprint"] = (section["fingerprint"].upper()
496
919
.replace(" ", ""))
497
920
if "secret" in section:
498
client["secret"] = section["secret"].decode("base64")
921
client["secret"] = codecs.decode(section["secret"]
922
.encode("utf-8"),
923
"base64")
499
924
elif "secfile" in section:
500
925
with open(os.path.expanduser(os.path.expandvars
501
926
(section["secfile"])),
502
927
"rb") as secfile:
503
928
client["secret"] = secfile.read()
504
929
else:
505
raise TypeError("No secret or secfile for section {0}"
930
raise TypeError("No secret or secfile for section {}"
506
931
.format(section))
507
932
client["timeout"] = string_to_delta(section["timeout"])
508
933
client["extended_timeout"] = string_to_delta(
516
941
client["last_approval_request"] = None
517
942
client["last_checked_ok"] = None
518
943
client["last_checker_status"] = -2
519
944
520
945
return settings
521
522
def __init__(self, settings, name = None):
946
947
def __init__(self, settings, name=None, server_settings=None):
523
948
self.name = name
949
if server_settings is None:
950
server_settings = {}
951
self.server_settings = server_settings
524
952
# adding all client settings
525
for setting, value in settings.iteritems():
953
for setting, value in settings.items():
526
954
setattr(self, setting, value)
527
955
528
956
if self.enabled:
529
957
if not hasattr(self, "last_enabled"):
530
958
self.last_enabled = datetime.datetime.utcnow()
534
962
else:
535
963
self.last_enabled = None
536
964
self.expires = None
537
965
538
966
logger.debug("Creating client %r", self.name)
539
# Uppercase and remove spaces from fingerprint for later
540
# comparison purposes with return value from the fingerprint()
541
# function
967
logger.debug(" Key ID: %s", self.key_id)
542
968
logger.debug(" Fingerprint: %s", self.fingerprint)
543
969
self.created = settings.get("created",
544
970
datetime.datetime.utcnow())
545
971
546
972
# attributes specific for this server instance
547
973
self.checker = None
548
974
self.checker_initiator_tag = None
551
977
self.current_checker_command = None
552
978
self.approved = None
553
979
self.approvals_pending = 0
554
self.changedstate = (multiprocessing_manager
555
.Condition(multiprocessing_manager
556
.Lock()))
557
self.client_structure = [attr for attr in
558
self.__dict__.iterkeys()
980
self.changedstate = multiprocessing_manager.Condition(
981
multiprocessing_manager.Lock())
982
self.client_structure = [attr
983
for attr in self.__dict__.keys()
559
984
if not attr.startswith("_")]
560
985
self.client_structure.append("client_structure")
561
562
for name, t in inspect.getmembers(type(self),
563
lambda obj:
564
isinstance(obj,
565
property)):
986
987
for name, t in inspect.getmembers(
988
type(self), lambda obj: isinstance(obj, property)):
566
989
if not name.startswith("_"):
567
990
self.client_structure.append(name)
568
991
569
992
# Send notice to process children that client state has changed
570
993
def send_changedstate(self):
571
994
with self.changedstate:
572
995
self.changedstate.notify_all()
573
996
574
997
def enable(self):
575
998
"""Start this client's checker and timeout hooks"""
576
999
if getattr(self, "enabled", False):
581
1004
self.last_enabled = datetime.datetime.utcnow()
582
1005
self.init_checker()
583
1006
self.send_changedstate()
584
1007
585
1008
def disable(self, quiet=True):
586
1009
"""Disable this client."""
587
1010
if not getattr(self, "enabled", False):
589
1012
if not quiet:
590
1013
logger.info("Disabling client %s", self.name)
591
1014
if getattr(self, "disable_initiator_tag", None) is not None:
592
gobject.source_remove(self.disable_initiator_tag)
1015
GLib.source_remove(self.disable_initiator_tag)
593
1016
self.disable_initiator_tag = None
594
1017
self.expires = None
595
1018
if getattr(self, "checker_initiator_tag", None) is not None:
596
gobject.source_remove(self.checker_initiator_tag)
1019
GLib.source_remove(self.checker_initiator_tag)
597
1020
self.checker_initiator_tag = None
598
1021
self.stop_checker()
599
1022
self.enabled = False
600
1023
if not quiet:
601
1024
self.send_changedstate()
602
# Do not run this again if called by a gobject.timeout_add
1025
# Do not run this again if called by a GLib.timeout_add
603
1026
return False
604
1027
605
1028
def __del__(self):
606
1029
self.disable()
607
1030
608
1031
def init_checker(self):
609
1032
# Schedule a new checker to be started an 'interval' from now,
610
1033
# and every interval from then on.
611
1034
if self.checker_initiator_tag is not None:
612
gobject.source_remove(self.checker_initiator_tag)
613
self.checker_initiator_tag = (gobject.timeout_add
614
(self.interval_milliseconds(),
615
self.start_checker))
1035
GLib.source_remove(self.checker_initiator_tag)
1036
self.checker_initiator_tag = GLib.timeout_add(
1037
int(self.interval.total_seconds() * 1000),
1038
self.start_checker)
616
1039
# Schedule a disable() when 'timeout' has passed
617
1040
if self.disable_initiator_tag is not None:
618
gobject.source_remove(self.disable_initiator_tag)
619
self.disable_initiator_tag = (gobject.timeout_add
620
(self.timeout_milliseconds(),
621
self.disable))
1041
GLib.source_remove(self.disable_initiator_tag)
1042
self.disable_initiator_tag = GLib.timeout_add(
1043
int(self.timeout.total_seconds() * 1000), self.disable)
622
1044
# Also start a new checker *right now*.
623
1045
self.start_checker()
624
625
def checker_callback(self, pid, condition, command):
1046
1047
def checker_callback(self, source, condition, connection,
1048
command):
626
1049
"""The checker has completed, so take appropriate actions."""
627
1050
self.checker_callback_tag = None
628
1051
self.checker = None
629
if os.WIFEXITED(condition):
630
self.last_checker_status = os.WEXITSTATUS(condition)
1052
# Read return code from connection (see call_pipe)
1053
returncode = connection.recv()
1054
connection.close()
1055
1056
if returncode >= 0:
1057
self.last_checker_status = returncode
1058
self.last_checker_signal = None
631
1059
if self.last_checker_status == 0:
632
1060
logger.info("Checker for %(name)s succeeded",
633
1061
vars(self))
634
1062
self.checked_ok()
635
1063
else:
636
logger.info("Checker for %(name)s failed",
637
vars(self))
1064
logger.info("Checker for %(name)s failed", vars(self))
638
1065
else:
639
1066
self.last_checker_status = -1
1067
self.last_checker_signal = -returncode
640
1068
logger.warning("Checker for %(name)s crashed?",
641
1069
vars(self))
642
1070
return False
1071
643
1072
def checked_ok(self):
644
1073
"""Assert that the client has been seen, alive and well."""
645
1074
self.last_checked_ok = datetime.datetime.utcnow()
646
1075
self.last_checker_status = 0
1076
self.last_checker_signal = None
647
1077
self.bump_timeout()
648
1078
649
1079
def bump_timeout(self, timeout=None):
650
1080
"""Bump up the timeout for this client."""
651
1081
if timeout is None:
652
1082
timeout = self.timeout
653
1083
if self.disable_initiator_tag is not None:
654
gobject.source_remove(self.disable_initiator_tag)
1084
GLib.source_remove(self.disable_initiator_tag)
655
1085
self.disable_initiator_tag = None
656
1086
if getattr(self, "enabled", False):
657
self.disable_initiator_tag = (gobject.timeout_add
658
(timedelta_to_milliseconds
659
(timeout), self.disable))
1087
self.disable_initiator_tag = GLib.timeout_add(
1088
int(timeout.total_seconds() * 1000), self.disable)
660
1089
self.expires = datetime.datetime.utcnow() + timeout
661
1090
662
1091
def need_approval(self):
663
1092
self.last_approval_request = datetime.datetime.utcnow()
664
1093
665
1094
def start_checker(self):
666
1095
"""Start a new checker subprocess if one is not running.
667
1096
668
1097
If a checker already exists, leave it running and do
669
1098
nothing."""
670
1099
# The reason for not killing a running checker is that if we
675
1104
# checkers alone, the checker would have to take more time
676
1105
# than 'timeout' for the client to be disabled, which is as it
677
1106
# should be.
678
679
# If a checker exists, make sure it is not a zombie
680
try:
681
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
682
except (AttributeError, OSError) as error:
683
if (isinstance(error, OSError)
684
and error.errno != errno.ECHILD):
685
raise error
686
else:
687
if pid:
688
logger.warning("Checker was a zombie")
689
gobject.source_remove(self.checker_callback_tag)
690
self.checker_callback(pid, status,
691
self.current_checker_command)
1107
1108
if self.checker is not None and not self.checker.is_alive():
1109
logger.warning("Checker was not alive; joining")
1110
self.checker.join()
1111
self.checker = None
692
1112
# Start a new checker if needed
693
1113
if self.checker is None:
694
1114
# Escape attributes for the shell
695
escaped_attrs = dict(
696
(attr, re.escape(unicode(getattr(self, attr))))
697
for attr in
698
self.runtime_expansions)
1115
escaped_attrs = {
1116
attr: re.escape(str(getattr(self, attr)))
1117
for attr in self.runtime_expansions}
699
1118
try:
700
1119
command = self.checker_command % escaped_attrs
701
1120
except TypeError as error:
702
1121
logger.error('Could not format string "%s"',
703
self.checker_command, exc_info=error)
704
return True # Try again later
1122
self.checker_command,
1123
exc_info=error)
1124
return True # Try again later
705
1125
self.current_checker_command = command
706
try:
707
logger.info("Starting checker %r for %s",
708
command, self.name)
709
# We don't need to redirect stdout and stderr, since
710
# in normal mode, that is already done by daemon(),
711
# and in debug mode we don't want to. (Stdin is
712
# always replaced by /dev/null.)
713
self.checker = subprocess.Popen(command,
714
close_fds=True,
715
shell=True, cwd="/")
716
except OSError as error:
717
logger.error("Failed to start subprocess",
718
exc_info=error)
719
self.checker_callback_tag = (gobject.child_watch_add
720
(self.checker.pid,
721
self.checker_callback,
722
data=command))
723
# The checker may have completed before the gobject
724
# watch was added. Check for this.
725
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
726
if pid:
727
gobject.source_remove(self.checker_callback_tag)
728
self.checker_callback(pid, status, command)
729
# Re-run this periodically if run by gobject.timeout_add
1126
logger.info("Starting checker %r for %s", command,
1127
self.name)
1128
# We don't need to redirect stdout and stderr, since
1129
# in normal mode, that is already done by daemon(),
1130
# and in debug mode we don't want to. (Stdin is
1131
# always replaced by /dev/null.)
1132
# The exception is when not debugging but nevertheless
1133
# running in the foreground; use the previously
1134
# created wnull.
1135
popen_args = {"close_fds": True,
1136
"shell": True,
1137
"cwd": "/"}
1138
if (not self.server_settings["debug"]
1139
and self.server_settings["foreground"]):
1140
popen_args.update({"stdout": wnull,
1141
"stderr": wnull})
1142
pipe = multiprocessing.Pipe(duplex=False)
1143
self.checker = multiprocessing.Process(
1144
target=call_pipe,
1145
args=(pipe[1], subprocess.call, command),
1146
kwargs=popen_args)
1147
self.checker.start()
1148
self.checker_callback_tag = GLib.io_add_watch(
1149
pipe[0].fileno(), GLib.IO_IN,
1150
self.checker_callback, pipe[0], command)
1151
# Re-run this periodically if run by GLib.timeout_add
730
1152
return True
731
1153
732
1154
def stop_checker(self):
733
1155
"""Force the checker process, if any, to stop."""
734
1156
if self.checker_callback_tag:
735
gobject.source_remove(self.checker_callback_tag)
1157
GLib.source_remove(self.checker_callback_tag)
736
1158
self.checker_callback_tag = None
737
1159
if getattr(self, "checker", None) is None:
738
1160
return
739
1161
logger.debug("Stopping checker for %(name)s", vars(self))
740
try:
741
self.checker.terminate()
742
#time.sleep(0.5)
743
#if self.checker.poll() is None:
744
# self.checker.kill()
745
except OSError as error:
746
if error.errno != errno.ESRCH: # No such process
747
raise
1162
self.checker.terminate()
748
1163
self.checker = None
749
1164
750
1165
751
def dbus_service_property(dbus_interface, signature="v",
752
access="readwrite", byte_arrays=False):
1166
def dbus_service_property(dbus_interface,
1167
signature="v",
1168
access="readwrite",
1169
byte_arrays=False):
753
1170
"""Decorators for marking methods of a DBusObjectWithProperties to
754
1171
become properties on the D-Bus.
755
1172
756
1173
The decorated method will be called with no arguments by "Get"
757
1174
and with one argument by "Set".
758
1175
759
1176
The parameters, where they are supported, are the same as
760
1177
dbus.service.method, except there is only "signature", since the
761
1178
type from Get() and the type sent to Set() is the same.
764
1181
# "Set" method, so we fail early here:
765
1182
if byte_arrays and signature != "ay":
766
1183
raise ValueError("Byte arrays not supported for non-'ay'"
767
" signature {0!r}".format(signature))
1184
" signature {!r}".format(signature))
1185
768
1186
def decorator(func):
769
1187
func._dbus_is_property = True
770
1188
func._dbus_interface = dbus_interface
773
1191
func._dbus_name = func.__name__
774
1192
if func._dbus_name.endswith("_dbus_property"):
775
1193
func._dbus_name = func._dbus_name[:-14]
776
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
1194
func._dbus_get_args_options = {'byte_arrays': byte_arrays}
777
1195
return func
1196
778
1197
return decorator
779
1198
780
1199
781
1200
def dbus_interface_annotations(dbus_interface):
782
1201
"""Decorator for marking functions returning interface annotations
783
1202
784
1203
Usage:
785
1204
786
1205
@dbus_interface_annotations("org.example.Interface")
787
1206
def _foo(self): # Function name does not matter
788
1207
return {"org.freedesktop.DBus.Deprecated": "true",
789
1208
"org.freedesktop.DBus.Property.EmitsChangedSignal":
790
1209
"false"}
791
1210
"""
1211
792
1212
def decorator(func):
793
1213
func._dbus_is_interface = True
794
1214
func._dbus_interface = dbus_interface
795
1215
func._dbus_name = dbus_interface
796
1216
return func
1217
797
1218
return decorator
798
1219
799
1220
800
1221
def dbus_annotations(annotations):
801
1222
"""Decorator to annotate D-Bus methods, signals or properties
802
1223
Usage:
803
1224
1225
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
1226
"org.freedesktop.DBus.Property."
1227
"EmitsChangedSignal": "false"})
804
1228
@dbus_service_property("org.example.Interface", signature="b",
805
1229
access="r")
806
@dbus_annotations({{"org.freedesktop.DBus.Deprecated": "true",
807
"org.freedesktop.DBus.Property."
808
"EmitsChangedSignal": "false"})
809
1230
def Property_dbus_property(self):
810
1231
return dbus.Boolean(False)
1232
1233
See also the DBusObjectWithAnnotations class.
811
1234
"""
1235
812
1236
def decorator(func):
813
1237
func._dbus_annotations = annotations
814
1238
return func
1239
815
1240
return decorator
816
1241
817
1242
818
1243
class DBusPropertyException(dbus.exceptions.DBusException):
819
1244
"""A base class for D-Bus property-related exceptions
820
1245
"""
821
def __unicode__(self):
822
return unicode(str(self))
1246
pass
823
1247
824
1248
825
1249
class DBusPropertyAccessException(DBusPropertyException):
834
1258
pass
835
1259
836
1260
837
class DBusObjectWithProperties(dbus.service.Object):
838
"""A D-Bus object with properties.
839
840
Classes inheriting from this can use the dbus_service_property
841
decorator to expose methods as D-Bus properties. It exposes the
842
standard Get(), Set(), and GetAll() methods on the D-Bus.
1261
class DBusObjectWithAnnotations(dbus.service.Object):
1262
"""A D-Bus object with annotations.
1263
1264
Classes inheriting from this can use the dbus_annotations
1265
decorator to add annotations to methods or signals.
843
1266
"""
844
1267
845
1268
@staticmethod
846
1269
def _is_dbus_thing(thing):
847
1270
"""Returns a function testing if an attribute is a D-Bus thing
848
1271
849
1272
If called like _is_dbus_thing("method") it returns a function
850
1273
suitable for use as predicate to inspect.getmembers().
851
1274
"""
852
return lambda obj: getattr(obj, "_dbus_is_{0}".format(thing),
1275
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
853
1276
False)
854
1277
855
1278
def _get_all_dbus_things(self, thing):
856
1279
"""Returns a generator of (name, attribute) pairs
857
1280
"""
858
return ((getattr(athing.__get__(self), "_dbus_name",
859
name),
1281
return ((getattr(athing.__get__(self), "_dbus_name", name),
860
1282
athing.__get__(self))
861
1283
for cls in self.__class__.__mro__
862
1284
for name, athing in
863
inspect.getmembers(cls,
864
self._is_dbus_thing(thing)))
865
1285
inspect.getmembers(cls, self._is_dbus_thing(thing)))
1286
1287
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1288
out_signature="s",
1289
path_keyword='object_path',
1290
connection_keyword='connection')
1291
def Introspect(self, object_path, connection):
1292
"""Overloading of standard D-Bus method.
1293
1294
Inserts annotation tags on methods and signals.
1295
"""
1296
xmlstring = dbus.service.Object.Introspect(self, object_path,
1297
connection)
1298
try:
1299
document = xml.dom.minidom.parseString(xmlstring)
1300
1301
for if_tag in document.getElementsByTagName("interface"):
1302
# Add annotation tags
1303
for typ in ("method", "signal"):
1304
for tag in if_tag.getElementsByTagName(typ):
1305
annots = dict()
1306
for name, prop in (self.
1307
_get_all_dbus_things(typ)):
1308
if (name == tag.getAttribute("name")
1309
and prop._dbus_interface
1310
== if_tag.getAttribute("name")):
1311
annots.update(getattr(
1312
prop, "_dbus_annotations", {}))
1313
for name, value in annots.items():
1314
ann_tag = document.createElement(
1315
"annotation")
1316
ann_tag.setAttribute("name", name)
1317
ann_tag.setAttribute("value", value)
1318
tag.appendChild(ann_tag)
1319
# Add interface annotation tags
1320
for annotation, value in dict(
1321
itertools.chain.from_iterable(
1322
annotations().items()
1323
for name, annotations
1324
in self._get_all_dbus_things("interface")
1325
if name == if_tag.getAttribute("name")
1326
)).items():
1327
ann_tag = document.createElement("annotation")
1328
ann_tag.setAttribute("name", annotation)
1329
ann_tag.setAttribute("value", value)
1330
if_tag.appendChild(ann_tag)
1331
# Fix argument name for the Introspect method itself
1332
if (if_tag.getAttribute("name")
1333
== dbus.INTROSPECTABLE_IFACE):
1334
for cn in if_tag.getElementsByTagName("method"):
1335
if cn.getAttribute("name") == "Introspect":
1336
for arg in cn.getElementsByTagName("arg"):
1337
if (arg.getAttribute("direction")
1338
== "out"):
1339
arg.setAttribute("name",
1340
"xml_data")
1341
xmlstring = document.toxml("utf-8")
1342
document.unlink()
1343
except (AttributeError, xml.dom.DOMException,
1344
xml.parsers.expat.ExpatError) as error:
1345
logger.error("Failed to override Introspection method",
1346
exc_info=error)
1347
return xmlstring
1348
1349
1350
class DBusObjectWithProperties(DBusObjectWithAnnotations):
1351
"""A D-Bus object with properties.
1352
1353
Classes inheriting from this can use the dbus_service_property
1354
decorator to expose methods as D-Bus properties. It exposes the
1355
standard Get(), Set(), and GetAll() methods on the D-Bus.
1356
"""
1357
866
1358
def _get_dbus_property(self, interface_name, property_name):
867
1359
"""Returns a bound method if one exists which is a D-Bus
868
1360
property with the specified name and interface.
869
1361
"""
870
for cls in self.__class__.__mro__:
871
for name, value in (inspect.getmembers
872
(cls,
873
self._is_dbus_thing("property"))):
1362
for cls in self.__class__.__mro__:
1363
for name, value in inspect.getmembers(
1364
cls, self._is_dbus_thing("property")):
874
1365
if (value._dbus_name == property_name
875
1366
and value._dbus_interface == interface_name):
876
1367
return value.__get__(self)
877
1368
878
1369
# No such property
879
raise DBusPropertyNotFound(self.dbus_object_path + ":"
880
+ interface_name + "."
881
+ property_name)
882
883
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
1370
raise DBusPropertyNotFound("{}:{}.{}".format(
1371
self.dbus_object_path, interface_name, property_name))
1372
1373
@classmethod
1374
def _get_all_interface_names(cls):
1375
"""Get a sequence of all interfaces supported by an object"""
1376
return (name for name in set(getattr(getattr(x, attr),
1377
"_dbus_interface", None)
1378
for x in (inspect.getmro(cls))
1379
for attr in dir(x))
1380
if name is not None)
1381
1382
@dbus.service.method(dbus.PROPERTIES_IFACE,
1383
in_signature="ss",
884
1384
out_signature="v")
885
1385
def Get(self, interface_name, property_name):
886
1386
"""Standard D-Bus property Get() method, see D-Bus standard.
892
1392
if not hasattr(value, "variant_level"):
893
1393
return value
894
1394
return type(value)(value, variant_level=value.variant_level+1)
895
1395
896
1396
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
897
1397
def Set(self, interface_name, property_name, value):
898
1398
"""Standard D-Bus property Set() method, see D-Bus standard.
904
1404
# The byte_arrays option is not supported yet on
905
1405
# signatures other than "ay".
906
1406
if prop._dbus_signature != "ay":
907
raise ValueError
1407
raise ValueError("Byte arrays not supported for non-"
1408
"'ay' signature {!r}"
1409
.format(prop._dbus_signature))
908
1410
value = dbus.ByteArray(b''.join(chr(byte)
909
1411
for byte in value))
910
1412
prop(value)
911
912
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
1413
1414
@dbus.service.method(dbus.PROPERTIES_IFACE,
1415
in_signature="s",
913
1416
out_signature="a{sv}")
914
1417
def GetAll(self, interface_name):
915
1418
"""Standard D-Bus property GetAll() method, see D-Bus
916
1419
standard.
917
1420
918
1421
Note: Will not include properties with access="write".
919
1422
"""
920
1423
properties = {}
930
1433
if not hasattr(value, "variant_level"):
931
1434
properties[name] = value
932
1435
continue
933
properties[name] = type(value)(value, variant_level=
934
value.variant_level+1)
1436
properties[name] = type(value)(
1437
value, variant_level=value.variant_level + 1)
935
1438
return dbus.Dictionary(properties, signature="sv")
936
1439
1440
@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
1441
def PropertiesChanged(self, interface_name, changed_properties,
1442
invalidated_properties):
1443
"""Standard D-Bus PropertiesChanged() signal, see D-Bus
1444
standard.
1445
"""
1446
pass
1447
937
1448
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
938
1449
out_signature="s",
939
1450
path_keyword='object_path',
940
1451
connection_keyword='connection')
941
1452
def Introspect(self, object_path, connection):
942
1453
"""Overloading of standard D-Bus method.
943
1454
944
1455
Inserts property tags and interface annotation tags.
945
1456
"""
946
xmlstring = dbus.service.Object.Introspect(self, object_path,
947
connection)
1457
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1458
object_path,
1459
connection)
948
1460
try:
949
1461
document = xml.dom.minidom.parseString(xmlstring)
1462
950
1463
def make_tag(document, name, prop):
951
1464
e = document.createElement("property")
952
1465
e.setAttribute("name", name)
953
1466
e.setAttribute("type", prop._dbus_signature)
954
1467
e.setAttribute("access", prop._dbus_access)
955
1468
return e
1469
956
1470
for if_tag in document.getElementsByTagName("interface"):
957
1471
# Add property tags
958
1472
for tag in (make_tag(document, name, prop)
961
1475
if prop._dbus_interface
962
1476
== if_tag.getAttribute("name")):
963
1477
if_tag.appendChild(tag)
964
# Add annotation tags
965
for typ in ("method", "signal", "property"):
966
for tag in if_tag.getElementsByTagName(typ):
967
annots = dict()
968
for name, prop in (self.
969
_get_all_dbus_things(typ)):
970
if (name == tag.getAttribute("name")
971
and prop._dbus_interface
972
== if_tag.getAttribute("name")):
973
annots.update(getattr
974
(prop,
975
"_dbus_annotations",
976
{}))
977
for name, value in annots.iteritems():
978
ann_tag = document.createElement(
979
"annotation")
980
ann_tag.setAttribute("name", name)
981
ann_tag.setAttribute("value", value)
982
tag.appendChild(ann_tag)
983
# Add interface annotation tags
984
for annotation, value in dict(
985
itertools.chain.from_iterable(
986
annotations().iteritems()
987
for name, annotations in
988
self._get_all_dbus_things("interface")
989
if name == if_tag.getAttribute("name")
990
)).iteritems():
991
ann_tag = document.createElement("annotation")
992
ann_tag.setAttribute("name", annotation)
993
ann_tag.setAttribute("value", value)
994
if_tag.appendChild(ann_tag)
1478
# Add annotation tags for properties
1479
for tag in if_tag.getElementsByTagName("property"):
1480
annots = dict()
1481
for name, prop in self._get_all_dbus_things(
1482
"property"):
1483
if (name == tag.getAttribute("name")
1484
and prop._dbus_interface
1485
== if_tag.getAttribute("name")):
1486
annots.update(getattr(
1487
prop, "_dbus_annotations", {}))
1488
for name, value in annots.items():
1489
ann_tag = document.createElement(
1490
"annotation")
1491
ann_tag.setAttribute("name", name)
1492
ann_tag.setAttribute("value", value)
1493
tag.appendChild(ann_tag)
995
1494
# Add the names to the return values for the
996
1495
# "org.freedesktop.DBus.Properties" methods
997
1496
if (if_tag.getAttribute("name")
1016
1515
return xmlstring
1017
1516
1018
1517
1518
try:
1519
dbus.OBJECT_MANAGER_IFACE
1520
except AttributeError:
1521
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1522
1523
1524
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1525
"""A D-Bus object with an ObjectManager.
1526
1527
Classes inheriting from this exposes the standard
1528
GetManagedObjects call and the InterfacesAdded and
1529
InterfacesRemoved signals on the standard
1530
"org.freedesktop.DBus.ObjectManager" interface.
1531
1532
Note: No signals are sent automatically; they must be sent
1533
manually.
1534
"""
1535
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1536
out_signature="a{oa{sa{sv}}}")
1537
def GetManagedObjects(self):
1538
"""This function must be overridden"""
1539
raise NotImplementedError()
1540
1541
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1542
signature="oa{sa{sv}}")
1543
def InterfacesAdded(self, object_path, interfaces_and_properties):
1544
pass
1545
1546
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1547
def InterfacesRemoved(self, object_path, interfaces):
1548
pass
1549
1550
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1551
out_signature="s",
1552
path_keyword='object_path',
1553
connection_keyword='connection')
1554
def Introspect(self, object_path, connection):
1555
"""Overloading of standard D-Bus method.
1556
1557
Override return argument name of GetManagedObjects to be
1558
"objpath_interfaces_and_properties"
1559
"""
1560
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1561
object_path,
1562
connection)
1563
try:
1564
document = xml.dom.minidom.parseString(xmlstring)
1565
1566
for if_tag in document.getElementsByTagName("interface"):
1567
# Fix argument name for the GetManagedObjects method
1568
if (if_tag.getAttribute("name")
1569
== dbus.OBJECT_MANAGER_IFACE):
1570
for cn in if_tag.getElementsByTagName("method"):
1571
if (cn.getAttribute("name")
1572
== "GetManagedObjects"):
1573
for arg in cn.getElementsByTagName("arg"):
1574
if (arg.getAttribute("direction")
1575
== "out"):
1576
arg.setAttribute(
1577
"name",
1578
"objpath_interfaces"
1579
"_and_properties")
1580
xmlstring = document.toxml("utf-8")
1581
document.unlink()
1582
except (AttributeError, xml.dom.DOMException,
1583
xml.parsers.expat.ExpatError) as error:
1584
logger.error("Failed to override Introspection method",
1585
exc_info=error)
1586
return xmlstring
1587
1588
1019
1589
def datetime_to_dbus(dt, variant_level=0):
1020
1590
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1021
1591
if dt is None:
1022
return dbus.String("", variant_level = variant_level)
1023
return dbus.String(dt.isoformat(),
1024
variant_level=variant_level)
1592
return dbus.String("", variant_level=variant_level)
1593
return dbus.String(dt.isoformat(), variant_level=variant_level)
1025
1594
1026
1595
1027
1596
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1029
1598
dbus.service.Object, it will add alternate D-Bus attributes with
1030
1599
interface names according to the "alt_interface_names" mapping.
1031
1600
Usage:
1032
1601
1033
1602
@alternate_dbus_interfaces({"org.example.Interface":
1034
1603
"net.example.AlternateInterface"})
1035
1604
class SampleDBusObject(dbus.service.Object):
1036
1605
@dbus.service.method("org.example.Interface")
1037
1606
def SampleDBusMethod():
1038
1607
pass
1039
1608
1040
1609
The above "SampleDBusMethod" on "SampleDBusObject" will be
1041
1610
reachable via two interfaces: "org.example.Interface" and
1042
1611
"net.example.AlternateInterface", the latter of which will have
1043
1612
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1044
1613
"true", unless "deprecate" is passed with a False value.
1045
1614
1046
1615
This works for methods and signals, and also for D-Bus properties
1047
1616
(from DBusObjectWithProperties) and interfaces (from the
1048
1617
dbus_interface_annotations decorator).
1049
1618
"""
1619
1050
1620
def wrapper(cls):
1051
1621
for orig_interface_name, alt_interface_name in (
1052
alt_interface_names.iteritems()):
1622
alt_interface_names.items()):
1053
1623
attr = {}
1054
1624
interface_names = set()
1055
1625
# Go though all attributes of the class
1057
1627
# Ignore non-D-Bus attributes, and D-Bus attributes
1058
1628
# with the wrong interface name
1059
1629
if (not hasattr(attribute, "_dbus_interface")
1060
or not attribute._dbus_interface
1061
.startswith(orig_interface_name)):
1630
or not attribute._dbus_interface.startswith(
1631
orig_interface_name)):
1062
1632
continue
1063
1633
# Create an alternate D-Bus interface name based on
1064
1634
# the current name
1065
alt_interface = (attribute._dbus_interface
1066
.replace(orig_interface_name,
1067
alt_interface_name))
1635
alt_interface = attribute._dbus_interface.replace(
1636
orig_interface_name, alt_interface_name)
1068
1637
interface_names.add(alt_interface)
1069
1638
# Is this a D-Bus signal?
1070
1639
if getattr(attribute, "_dbus_is_signal", False):
1071
# Extract the original non-method function by
1072
# black magic
1073
nonmethod_func = (dict(
1640
# Extract the original non-method undecorated
1641
# function by black magic
1642
if sys.version_info.major == 2:
1643
nonmethod_func = (dict(
1074
1644
zip(attribute.func_code.co_freevars,
1075
attribute.__closure__))["func"]
1076
.cell_contents)
1645
attribute.__closure__))
1646
["func"].cell_contents)
1647
else:
1648
nonmethod_func = (dict(
1649
zip(attribute.__code__.co_freevars,
1650
attribute.__closure__))
1651
["func"].cell_contents)
1077
1652
# Create a new, but exactly alike, function
1078
1653
# object, and decorate it to be a new D-Bus signal
1079
1654
# with the alternate D-Bus interface name
1080
new_function = (dbus.service.signal
1081
(alt_interface,
1082
attribute._dbus_signature)
1083
(types.FunctionType(
1084
nonmethod_func.func_code,
1085
nonmethod_func.func_globals,
1086
nonmethod_func.func_name,
1087
nonmethod_func.func_defaults,
1088
nonmethod_func.func_closure)))
1655
new_function = copy_function(nonmethod_func)
1656
new_function = (dbus.service.signal(
1657
alt_interface,
1658
attribute._dbus_signature)(new_function))
1089
1659
# Copy annotations, if any
1090
1660
try:
1091
new_function._dbus_annotations = (
1092
dict(attribute._dbus_annotations))
1661
new_function._dbus_annotations = dict(
1662
attribute._dbus_annotations)
1093
1663
except AttributeError:
1094
1664
pass
1665
1095
1666
# Define a creator of a function to call both the
1096
1667
# original and alternate functions, so both the
1097
1668
# original and alternate signals gets sent when
1100
1671
"""This function is a scope container to pass
1101
1672
func1 and func2 to the "call_both" function
1102
1673
outside of its arguments"""
1674
1675
@functools.wraps(func2)
1103
1676
def call_both(*args, **kwargs):
1104
1677
"""This function will emit two D-Bus
1105
1678
signals by calling func1 and func2"""
1106
1679
func1(*args, **kwargs)
1107
1680
func2(*args, **kwargs)
1681
# Make wrapper function look like a D-Bus
1682
# signal
1683
for name, attr in inspect.getmembers(func2):
1684
if name.startswith("_dbus_"):
1685
setattr(call_both, name, attr)
1686
1108
1687
return call_both
1109
1688
# Create the "call_both" function and add it to
1110
1689
# the class
1115
1694
# object. Decorate it to be a new D-Bus method
1116
1695
# with the alternate D-Bus interface name. Add it
1117
1696
# to the class.
1118
attr[attrname] = (dbus.service.method
1119
(alt_interface,
1120
attribute._dbus_in_signature,
1121
attribute._dbus_out_signature)
1122
(types.FunctionType
1123
(attribute.func_code,
1124
attribute.func_globals,
1125
attribute.func_name,
1126
attribute.func_defaults,
1127
attribute.func_closure)))
1697
attr[attrname] = (
1698
dbus.service.method(
1699
alt_interface,
1700
attribute._dbus_in_signature,
1701
attribute._dbus_out_signature)
1702
(copy_function(attribute)))
1128
1703
# Copy annotations, if any
1129
1704
try:
1130
attr[attrname]._dbus_annotations = (
1131
dict(attribute._dbus_annotations))
1705
attr[attrname]._dbus_annotations = dict(
1706
attribute._dbus_annotations)
1132
1707
except AttributeError:
1133
1708
pass
1134
1709
# Is this a D-Bus property?
1137
1712
# object, and decorate it to be a new D-Bus
1138
1713
# property with the alternate D-Bus interface
1139
1714
# name. Add it to the class.
1140
attr[attrname] = (dbus_service_property
1141
(alt_interface,
1142
attribute._dbus_signature,
1143
attribute._dbus_access,
1144
attribute
1145
._dbus_get_args_options
1146
["byte_arrays"])
1147
(types.FunctionType
1148
(attribute.func_code,
1149
attribute.func_globals,
1150
attribute.func_name,
1151
attribute.func_defaults,
1152
attribute.func_closure)))
1715
attr[attrname] = (dbus_service_property(
1716
alt_interface, attribute._dbus_signature,
1717
attribute._dbus_access,
1718
attribute._dbus_get_args_options
1719
["byte_arrays"])
1720
(copy_function(attribute)))
1153
1721
# Copy annotations, if any
1154
1722
try:
1155
attr[attrname]._dbus_annotations = (
1156
dict(attribute._dbus_annotations))
1723
attr[attrname]._dbus_annotations = dict(
1724
attribute._dbus_annotations)
1157
1725
except AttributeError:
1158
1726
pass
1159
1727
# Is this a D-Bus interface?
1162
1730
# object. Decorate it to be a new D-Bus interface
1163
1731
# with the alternate D-Bus interface name. Add it
1164
1732
# to the class.
1165
attr[attrname] = (dbus_interface_annotations
1166
(alt_interface)
1167
(types.FunctionType
1168
(attribute.func_code,
1169
attribute.func_globals,
1170
attribute.func_name,
1171
attribute.func_defaults,
1172
attribute.func_closure)))
1733
attr[attrname] = (
1734
dbus_interface_annotations(alt_interface)
1735
(copy_function(attribute)))
1173
1736
if deprecate:
1174
1737
# Deprecate all alternate interfaces
1175
iname="_AlternateDBusNames_interface_annotation{0}"
1738
iname = "_AlternateDBusNames_interface_annotation{}"
1176
1739
for interface_name in interface_names:
1740
1177
1741
@dbus_interface_annotations(interface_name)
1178
1742
def func(self):
1179
return { "org.freedesktop.DBus.Deprecated":
1180
"true" }
1743
return {"org.freedesktop.DBus.Deprecated":
1744
"true"}
1181
1745
# Find an unused name
1182
1746
for aname in (iname.format(i)
1183
1747
for i in itertools.count()):
1187
1751
if interface_names:
1188
1752
# Replace the class with a new subclass of it with
1189
1753
# methods, signals, etc. as created above.
1190
cls = type(b"{0}Alternate".format(cls.__name__),
1191
(cls,), attr)
1754
if sys.version_info.major == 2:
1755
cls = type(b"{}Alternate".format(cls.__name__),
1756
(cls, ), attr)
1757
else:
1758
cls = type("{}Alternate".format(cls.__name__),
1759
(cls, ), attr)
1192
1760
return cls
1761
1193
1762
return wrapper
1194
1763
1195
1764
1196
1765
@alternate_dbus_interfaces({"se.recompile.Mandos":
1197
"se.bsnet.fukt.Mandos"})
1766
"se.bsnet.fukt.Mandos"})
1198
1767
class ClientDBus(Client, DBusObjectWithProperties):
1199
1768
"""A Client class using D-Bus
1200
1769
1201
1770
Attributes:
1202
1771
dbus_object_path: dbus.ObjectPath
1203
1772
bus: dbus.SystemBus()
1204
1773
"""
1205
1774
1206
1775
runtime_expansions = (Client.runtime_expansions
1207
+ ("dbus_object_path",))
1208
1776
+ ("dbus_object_path", ))
1777
1778
_interface = "se.recompile.Mandos.Client"
1779
1209
1780
# dbus.service.Object doesn't use super(), so we can't either.
1210
1211
def __init__(self, bus = None, *args, **kwargs):
1781
1782
def __init__(self, bus=None, *args, **kwargs):
1212
1783
self.bus = bus
1213
1784
Client.__init__(self, *args, **kwargs)
1214
1785
# Only now, when this client is initialized, can it show up on
1215
1786
# the D-Bus
1216
client_object_name = unicode(self.name).translate(
1787
client_object_name = str(self.name).translate(
1217
1788
{ord("."): ord("_"),
1218
1789
ord("-"): ord("_")})
1219
self.dbus_object_path = (dbus.ObjectPath
1220
("/clients/" + client_object_name))
1790
self.dbus_object_path = dbus.ObjectPath(
1791
"/clients/" + client_object_name)
1221
1792
DBusObjectWithProperties.__init__(self, self.bus,
1222
1793
self.dbus_object_path)
1223
1224
def notifychangeproperty(transform_func,
1225
dbus_name, type_func=lambda x: x,
1226
variant_level=1):
1794
1795
def notifychangeproperty(transform_func, dbus_name,
1796
type_func=lambda x: x,
1797
variant_level=1,
1798
invalidate_only=False,
1799
_interface=_interface):
1227
1800
""" Modify a variable so that it's a property which announces
1228
1801
its changes to DBus.
1229
1802
1230
1803
transform_fun: Function that takes a value and a variant_level
1231
1804
and transforms it to a D-Bus type.
1232
1805
dbus_name: D-Bus name of the variable
1234
1807
to the D-Bus. Default: no transform
1235
1808
variant_level: D-Bus variant level. Default: 1
1236
1809
"""
1237
attrname = "_{0}".format(dbus_name)
1810
attrname = "_{}".format(dbus_name)
1811
1238
1812
def setter(self, value):
1239
1813
if hasattr(self, "dbus_object_path"):
1240
1814
if (not hasattr(self, attrname) or
1241
1815
type_func(getattr(self, attrname, None))
1242
1816
!= type_func(value)):
1243
dbus_value = transform_func(type_func(value),
1244
variant_level
1245
=variant_level)
1246
self.PropertyChanged(dbus.String(dbus_name),
1247
dbus_value)
1817
if invalidate_only:
1818
self.PropertiesChanged(
1819
_interface, dbus.Dictionary(),
1820
dbus.Array((dbus_name, )))
1821
else:
1822
dbus_value = transform_func(
1823
type_func(value),
1824
variant_level=variant_level)
1825
self.PropertyChanged(dbus.String(dbus_name),
1826
dbus_value)
1827
self.PropertiesChanged(
1828
_interface,
1829
dbus.Dictionary({dbus.String(dbus_name):
1830
dbus_value}),
1831
dbus.Array())
1248
1832
setattr(self, attrname, value)
1249
1833
1250
1834
return property(lambda self: getattr(self, attrname), setter)
1251
1835
1252
1836
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1253
1837
approvals_pending = notifychangeproperty(dbus.Boolean,
1254
1838
"ApprovalPending",
1255
type_func = bool)
1839
type_func=bool)
1256
1840
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1257
1841
last_enabled = notifychangeproperty(datetime_to_dbus,
1258
1842
"LastEnabled")
1259
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1260
type_func = lambda checker:
1261
checker is not None)
1843
checker = notifychangeproperty(
1844
dbus.Boolean, "CheckerRunning",
1845
type_func=lambda checker: checker is not None)
1262
1846
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1263
1847
"LastCheckedOK")
1264
1848
last_checker_status = notifychangeproperty(dbus.Int16,
1267
1851
datetime_to_dbus, "LastApprovalRequest")
1268
1852
approved_by_default = notifychangeproperty(dbus.Boolean,
1269
1853
"ApprovedByDefault")
1270
approval_delay = notifychangeproperty(dbus.UInt64,
1271
"ApprovalDelay",
1272
type_func =
1273
timedelta_to_milliseconds)
1854
approval_delay = notifychangeproperty(
1855
dbus.UInt64, "ApprovalDelay",
1856
type_func=lambda td: td.total_seconds() * 1000)
1274
1857
approval_duration = notifychangeproperty(
1275
1858
dbus.UInt64, "ApprovalDuration",
1276
type_func = timedelta_to_milliseconds)
1859
type_func=lambda td: td.total_seconds() * 1000)
1277
1860
host = notifychangeproperty(dbus.String, "Host")
1278
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1279
type_func =
1280
timedelta_to_milliseconds)
1861
timeout = notifychangeproperty(
1862
dbus.UInt64, "Timeout",
1863
type_func=lambda td: td.total_seconds() * 1000)
1281
1864
extended_timeout = notifychangeproperty(
1282
1865
dbus.UInt64, "ExtendedTimeout",
1283
type_func = timedelta_to_milliseconds)
1284
interval = notifychangeproperty(dbus.UInt64,
1285
"Interval",
1286
type_func =
1287
timedelta_to_milliseconds)
1866
type_func=lambda td: td.total_seconds() * 1000)
1867
interval = notifychangeproperty(
1868
dbus.UInt64, "Interval",
1869
type_func=lambda td: td.total_seconds() * 1000)
1288
1870
checker_command = notifychangeproperty(dbus.String, "Checker")
1289
1871
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1872
invalidate_only=True)
1873
1290
1874
del notifychangeproperty
1291
1875
1292
1876
def __del__(self, *args, **kwargs):
1293
1877
try:
1294
1878
self.remove_from_connection()
1297
1881
if hasattr(DBusObjectWithProperties, "__del__"):
1298
1882
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1299
1883
Client.__del__(self, *args, **kwargs)
1300
1301
def checker_callback(self, pid, condition, command,
1302
*args, **kwargs):
1303
self.checker_callback_tag = None
1304
self.checker = None
1305
if os.WIFEXITED(condition):
1306
exitstatus = os.WEXITSTATUS(condition)
1884
1885
def checker_callback(self, source, condition,
1886
connection, command, *args, **kwargs):
1887
ret = Client.checker_callback(self, source, condition,
1888
connection, command, *args,
1889
**kwargs)
1890
exitstatus = self.last_checker_status
1891
if exitstatus >= 0:
1307
1892
# Emit D-Bus signal
1308
1893
self.CheckerCompleted(dbus.Int16(exitstatus),
1309
dbus.Int64(condition),
1894
# This is specific to GNU libC
1895
dbus.Int64(exitstatus << 8),
1310
1896
dbus.String(command))
1311
1897
else:
1312
1898
# Emit D-Bus signal
1313
1899
self.CheckerCompleted(dbus.Int16(-1),
1314
dbus.Int64(condition),
1900
dbus.Int64(
1901
# This is specific to GNU libC
1902
(exitstatus << 8)
1903
| self.last_checker_signal),
1315
1904
dbus.String(command))
1316
1317
return Client.checker_callback(self, pid, condition, command,
1318
*args, **kwargs)
1319
1905
return ret
1906
1320
1907
def start_checker(self, *args, **kwargs):
1321
old_checker = self.checker
1322
if self.checker is not None:
1323
old_checker_pid = self.checker.pid
1324
else:
1325
old_checker_pid = None
1908
old_checker_pid = getattr(self.checker, "pid", None)
1326
1909
r = Client.start_checker(self, *args, **kwargs)
1327
1910
# Only if new checker process was started
1328
1911
if (self.checker is not None
1330
1913
# Emit D-Bus signal
1331
1914
self.CheckerStarted(self.current_checker_command)
1332
1915
return r
1333
1916
1334
1917
def _reset_approved(self):
1335
1918
self.approved = None
1336
1919
return False
1337
1920
1338
1921
def approve(self, value=True):
1339
1922
self.approved = value
1340
gobject.timeout_add(timedelta_to_milliseconds
1341
(self.approval_duration),
1342
self._reset_approved)
1923
GLib.timeout_add(int(self.approval_duration.total_seconds()
1924
* 1000), self._reset_approved)
1343
1925
self.send_changedstate()
1344
1345
## D-Bus methods, signals & properties
1346
_interface = "se.recompile.Mandos.Client"
1347
1348
## Interfaces
1349
1350
@dbus_interface_annotations(_interface)
1351
def _foo(self):
1352
return { "org.freedesktop.DBus.Property.EmitsChangedSignal":
1353
"false"}
1354
1355
## Signals
1356
1926
1927
# D-Bus methods, signals & properties
1928
1929
# Interfaces
1930
1931
# Signals
1932
1357
1933
# CheckerCompleted - signal
1358
1934
@dbus.service.signal(_interface, signature="nxs")
1359
1935
def CheckerCompleted(self, exitcode, waitstatus, command):
1360
1936
"D-Bus signal"
1361
1937
pass
1362
1938
1363
1939
# CheckerStarted - signal
1364
1940
@dbus.service.signal(_interface, signature="s")
1365
1941
def CheckerStarted(self, command):
1366
1942
"D-Bus signal"
1367
1943
pass
1368
1944
1369
1945
# PropertyChanged - signal
1946
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1370
1947
@dbus.service.signal(_interface, signature="sv")
1371
1948
def PropertyChanged(self, property, value):
1372
1949
"D-Bus signal"
1373
1950
pass
1374
1951
1375
1952
# GotSecret - signal
1376
1953
@dbus.service.signal(_interface)
1377
1954
def GotSecret(self):
1380
1957
server to mandos-client
1381
1958
"""
1382
1959
pass
1383
1960
1384
1961
# Rejected - signal
1385
1962
@dbus.service.signal(_interface, signature="s")
1386
1963
def Rejected(self, reason):
1387
1964
"D-Bus signal"
1388
1965
pass
1389
1966
1390
1967
# NeedApproval - signal
1391
1968
@dbus.service.signal(_interface, signature="tb")
1392
1969
def NeedApproval(self, timeout, default):
1393
1970
"D-Bus signal"
1394
1971
return self.need_approval()
1395
1396
## Methods
1397
1972
1973
# Methods
1974
1398
1975
# Approve - method
1399
1976
@dbus.service.method(_interface, in_signature="b")
1400
1977
def Approve(self, value):
1401
1978
self.approve(value)
1402
1979
1403
1980
# CheckedOK - method
1404
1981
@dbus.service.method(_interface)
1405
1982
def CheckedOK(self):
1406
1983
self.checked_ok()
1407
1984
1408
1985
# Enable - method
1986
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1409
1987
@dbus.service.method(_interface)
1410
1988
def Enable(self):
1411
1989
"D-Bus method"
1412
1990
self.enable()
1413
1991
1414
1992
# StartChecker - method
1993
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1415
1994
@dbus.service.method(_interface)
1416
1995
def StartChecker(self):
1417
1996
"D-Bus method"
1418
1997
self.start_checker()
1419
1998
1420
1999
# Disable - method
2000
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1421
2001
@dbus.service.method(_interface)
1422
2002
def Disable(self):
1423
2003
"D-Bus method"
1424
2004
self.disable()
1425
2005
1426
2006
# StopChecker - method
2007
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1427
2008
@dbus.service.method(_interface)
1428
2009
def StopChecker(self):
1429
2010
self.stop_checker()
1430
1431
## Properties
1432
2011
2012
# Properties
2013
1433
2014
# ApprovalPending - property
1434
2015
@dbus_service_property(_interface, signature="b", access="read")
1435
2016
def ApprovalPending_dbus_property(self):
1436
2017
return dbus.Boolean(bool(self.approvals_pending))
1437
2018
1438
2019
# ApprovedByDefault - property
1439
@dbus_service_property(_interface, signature="b",
2020
@dbus_service_property(_interface,
2021
signature="b",
1440
2022
access="readwrite")
1441
2023
def ApprovedByDefault_dbus_property(self, value=None):
1442
2024
if value is None: # get
1443
2025
return dbus.Boolean(self.approved_by_default)
1444
2026
self.approved_by_default = bool(value)
1445
2027
1446
2028
# ApprovalDelay - property
1447
@dbus_service_property(_interface, signature="t",
2029
@dbus_service_property(_interface,
2030
signature="t",
1448
2031
access="readwrite")
1449
2032
def ApprovalDelay_dbus_property(self, value=None):
1450
2033
if value is None: # get
1451
return dbus.UInt64(self.approval_delay_milliseconds())
2034
return dbus.UInt64(self.approval_delay.total_seconds()
2035
* 1000)
1452
2036
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1453
2037
1454
2038
# ApprovalDuration - property
1455
@dbus_service_property(_interface, signature="t",
2039
@dbus_service_property(_interface,
2040
signature="t",
1456
2041
access="readwrite")
1457
2042
def ApprovalDuration_dbus_property(self, value=None):
1458
2043
if value is None: # get
1459
return dbus.UInt64(timedelta_to_milliseconds(
1460
self.approval_duration))
2044
return dbus.UInt64(self.approval_duration.total_seconds()
2045
* 1000)
1461
2046
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1462
2047
1463
2048
# Name - property
2049
@dbus_annotations(
2050
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1464
2051
@dbus_service_property(_interface, signature="s", access="read")
1465
2052
def Name_dbus_property(self):
1466
2053
return dbus.String(self.name)
1467
2054
2055
# KeyID - property
2056
@dbus_annotations(
2057
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2058
@dbus_service_property(_interface, signature="s", access="read")
2059
def KeyID_dbus_property(self):
2060
return dbus.String(self.key_id)
2061
1468
2062
# Fingerprint - property
2063
@dbus_annotations(
2064
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1469
2065
@dbus_service_property(_interface, signature="s", access="read")
1470
2066
def Fingerprint_dbus_property(self):
1471
2067
return dbus.String(self.fingerprint)
1472
2068
1473
2069
# Host - property
1474
@dbus_service_property(_interface, signature="s",
2070
@dbus_service_property(_interface,
2071
signature="s",
1475
2072
access="readwrite")
1476
2073
def Host_dbus_property(self, value=None):
1477
2074
if value is None: # get
1478
2075
return dbus.String(self.host)
1479
self.host = unicode(value)
1480
2076
self.host = str(value)
2077
1481
2078
# Created - property
2079
@dbus_annotations(
2080
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1482
2081
@dbus_service_property(_interface, signature="s", access="read")
1483
2082
def Created_dbus_property(self):
1484
2083
return datetime_to_dbus(self.created)
1485
2084
1486
2085
# LastEnabled - property
1487
2086
@dbus_service_property(_interface, signature="s", access="read")
1488
2087
def LastEnabled_dbus_property(self):
1489
2088
return datetime_to_dbus(self.last_enabled)
1490
2089
1491
2090
# Enabled - property
1492
@dbus_service_property(_interface, signature="b",
2091
@dbus_service_property(_interface,
2092
signature="b",
1493
2093
access="readwrite")
1494
2094
def Enabled_dbus_property(self, value=None):
1495
2095
if value is None: # get
1498
2098
self.enable()
1499
2099
else:
1500
2100
self.disable()
1501
2101
1502
2102
# LastCheckedOK - property
1503
@dbus_service_property(_interface, signature="s",
2103
@dbus_service_property(_interface,
2104
signature="s",
1504
2105
access="readwrite")
1505
2106
def LastCheckedOK_dbus_property(self, value=None):
1506
2107
if value is not None:
1507
2108
self.checked_ok()
1508
2109
return
1509
2110
return datetime_to_dbus(self.last_checked_ok)
1510
2111
1511
2112
# LastCheckerStatus - property
1512
@dbus_service_property(_interface, signature="n",
1513
access="read")
2113
@dbus_service_property(_interface, signature="n", access="read")
1514
2114
def LastCheckerStatus_dbus_property(self):
1515
2115
return dbus.Int16(self.last_checker_status)
1516
2116
1517
2117
# Expires - property
1518
2118
@dbus_service_property(_interface, signature="s", access="read")
1519
2119
def Expires_dbus_property(self):
1520
2120
return datetime_to_dbus(self.expires)
1521
2121
1522
2122
# LastApprovalRequest - property
1523
2123
@dbus_service_property(_interface, signature="s", access="read")
1524
2124
def LastApprovalRequest_dbus_property(self):
1525
2125
return datetime_to_dbus(self.last_approval_request)
1526
2126
1527
2127
# Timeout - property
1528
@dbus_service_property(_interface, signature="t",
2128
@dbus_service_property(_interface,
2129
signature="t",
1529
2130
access="readwrite")
1530
2131
def Timeout_dbus_property(self, value=None):
1531
2132
if value is None: # get
1532
return dbus.UInt64(self.timeout_milliseconds())
2133
return dbus.UInt64(self.timeout.total_seconds() * 1000)
1533
2134
old_timeout = self.timeout
1534
2135
self.timeout = datetime.timedelta(0, 0, 0, value)
1535
2136
# Reschedule disabling
1543
2144
if (getattr(self, "disable_initiator_tag", None)
1544
2145
is None):
1545
2146
return
1546
gobject.source_remove(self.disable_initiator_tag)
1547
self.disable_initiator_tag = (
1548
gobject.timeout_add(
1549
timedelta_to_milliseconds(self.expires - now),
1550
self.disable))
1551
2147
GLib.source_remove(self.disable_initiator_tag)
2148
self.disable_initiator_tag = GLib.timeout_add(
2149
int((self.expires - now).total_seconds() * 1000),
2150
self.disable)
2151
1552
2152
# ExtendedTimeout - property
1553
@dbus_service_property(_interface, signature="t",
2153
@dbus_service_property(_interface,
2154
signature="t",
1554
2155
access="readwrite")
1555
2156
def ExtendedTimeout_dbus_property(self, value=None):
1556
2157
if value is None: # get
1557
return dbus.UInt64(self.extended_timeout_milliseconds())
2158
return dbus.UInt64(self.extended_timeout.total_seconds()
2159
* 1000)
1558
2160
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1559
2161
1560
2162
# Interval - property
1561
@dbus_service_property(_interface, signature="t",
2163
@dbus_service_property(_interface,
2164
signature="t",
1562
2165
access="readwrite")
1563
2166
def Interval_dbus_property(self, value=None):
1564
2167
if value is None: # get
1565
return dbus.UInt64(self.interval_milliseconds())
2168
return dbus.UInt64(self.interval.total_seconds() * 1000)
1566
2169
self.interval = datetime.timedelta(0, 0, 0, value)
1567
2170
if getattr(self, "checker_initiator_tag", None) is None:
1568
2171
return
1569
2172
if self.enabled:
1570
2173
# Reschedule checker run
1571
gobject.source_remove(self.checker_initiator_tag)
1572
self.checker_initiator_tag = (gobject.timeout_add
1573
(value, self.start_checker))
1574
self.start_checker() # Start one now, too
1575
2174
GLib.source_remove(self.checker_initiator_tag)
2175
self.checker_initiator_tag = GLib.timeout_add(
2176
value, self.start_checker)
2177
self.start_checker() # Start one now, too
2178
1576
2179
# Checker - property
1577
@dbus_service_property(_interface, signature="s",
2180
@dbus_service_property(_interface,
2181
signature="s",
1578
2182
access="readwrite")
1579
2183
def Checker_dbus_property(self, value=None):
1580
2184
if value is None: # get
1581
2185
return dbus.String(self.checker_command)
1582
self.checker_command = unicode(value)
1583
2186
self.checker_command = str(value)
2187
1584
2188
# CheckerRunning - property
1585
@dbus_service_property(_interface, signature="b",
2189
@dbus_service_property(_interface,
2190
signature="b",
1586
2191
access="readwrite")
1587
2192
def CheckerRunning_dbus_property(self, value=None):
1588
2193
if value is None: # get
1591
2196
self.start_checker()
1592
2197
else:
1593
2198
self.stop_checker()
1594
2199
1595
2200
# ObjectPath - property
2201
@dbus_annotations(
2202
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
2203
"org.freedesktop.DBus.Deprecated": "true"})
1596
2204
@dbus_service_property(_interface, signature="o", access="read")
1597
2205
def ObjectPath_dbus_property(self):
1598
return self.dbus_object_path # is already a dbus.ObjectPath
1599
2206
return self.dbus_object_path # is already a dbus.ObjectPath
2207
1600
2208
# Secret = property
1601
@dbus_service_property(_interface, signature="ay",
1602
access="write", byte_arrays=True)
2209
@dbus_annotations(
2210
{"org.freedesktop.DBus.Property.EmitsChangedSignal":
2211
"invalidates"})
2212
@dbus_service_property(_interface,
2213
signature="ay",
2214
access="write",
2215
byte_arrays=True)
1603
2216
def Secret_dbus_property(self, value):
1604
self.secret = str(value)
1605
2217
self.secret = bytes(value)
2218
1606
2219
del _interface
1607
2220
1608
2221
1609
2222
class ProxyClient(object):
1610
def __init__(self, child_pipe, fpr, address):
2223
def __init__(self, child_pipe, key_id, fpr, address):
1611
2224
self._pipe = child_pipe
1612
self._pipe.send(('init', fpr, address))
2225
self._pipe.send(('init', key_id, fpr, address))
1613
2226
if not self._pipe.recv():
1614
raise KeyError()
1615
2227
raise KeyError(key_id or fpr)
2228
1616
2229
def __getattribute__(self, name):
1617
2230
if name == '_pipe':
1618
2231
return super(ProxyClient, self).__getattribute__(name)
1621
2234
if data[0] == 'data':
1622
2235
return data[1]
1623
2236
if data[0] == 'function':
2237
1624
2238
def func(*args, **kwargs):
1625
2239
self._pipe.send(('funcall', name, args, kwargs))
1626
2240
return self._pipe.recv()[1]
2241
1627
2242
return func
1628
2243
1629
2244
def __setattr__(self, name, value):
1630
2245
if name == '_pipe':
1631
2246
return super(ProxyClient, self).__setattr__(name, value)
1634
2249
1635
2250
class ClientHandler(socketserver.BaseRequestHandler, object):
1636
2251
"""A class to handle client connections.
1637
2252
1638
2253
Instantiated once for each connection to handle it.
1639
2254
Note: This will run in its own forked process."""
1640
2255
1641
2256
def handle(self):
1642
2257
with contextlib.closing(self.server.child_pipe) as child_pipe:
1643
2258
logger.info("TCP connection from: %s",
1644
unicode(self.client_address))
2259
str(self.client_address))
1645
2260
logger.debug("Pipe FD: %d",
1646
2261
self.server.child_pipe.fileno())
1647
1648
session = (gnutls.connection
1649
.ClientSession(self.request,
1650
gnutls.connection
1651
.X509Credentials()))
1652
1653
# Note: gnutls.connection.X509Credentials is really a
1654
# generic GnuTLS certificate credentials object so long as
1655
# no X.509 keys are added to it. Therefore, we can use it
1656
# here despite using OpenPGP certificates.
1657
1658
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1659
# "+AES-256-CBC", "+SHA1",
1660
# "+COMP-NULL", "+CTYPE-OPENPGP",
1661
# "+DHE-DSS"))
2262
2263
session = gnutls.ClientSession(self.request)
2264
2265
# priority = ':'.join(("NONE", "+VERS-TLS1.1",
2266
# "+AES-256-CBC", "+SHA1",
2267
# "+COMP-NULL", "+CTYPE-OPENPGP",
2268
# "+DHE-DSS"))
1662
2269
# Use a fallback default, since this MUST be set.
1663
2270
priority = self.server.gnutls_priority
1664
2271
if priority is None:
1665
2272
priority = "NORMAL"
1666
(gnutls.library.functions
1667
.gnutls_priority_set_direct(session._c_object,
1668
priority, None))
1669
2273
gnutls.priority_set_direct(session._c_object,
2274
priority.encode("utf-8"),
2275
None)
2276
1670
2277
# Start communication using the Mandos protocol
1671
2278
# Get protocol number
1672
2279
line = self.request.makefile().readline()
1673
2280
logger.debug("Protocol version: %r", line)
1674
2281
try:
1675
2282
if int(line.strip().split()[0]) > 1:
1676
raise RuntimeError
2283
raise RuntimeError(line)
1677
2284
except (ValueError, IndexError, RuntimeError) as error:
1678
2285
logger.error("Unknown protocol version: %s", error)
1679
2286
return
1680
2287
1681
2288
# Start GnuTLS connection
1682
2289
try:
1683
2290
session.handshake()
1684
except gnutls.errors.GNUTLSError as error:
2291
except gnutls.Error as error:
1685
2292
logger.warning("Handshake failed: %s", error)
1686
2293
# Do not run session.bye() here: the session is not
1687
2294
# established. Just abandon the request.
1688
2295
return
1689
2296
logger.debug("Handshake succeeded")
1690
2297
1691
2298
approval_required = False
1692
2299
try:
1693
try:
1694
fpr = self.fingerprint(self.peer_certificate
1695
(session))
1696
except (TypeError,
1697
gnutls.errors.GNUTLSError) as error:
1698
logger.warning("Bad certificate: %s", error)
1699
return
1700
logger.debug("Fingerprint: %s", fpr)
1701
1702
try:
1703
client = ProxyClient(child_pipe, fpr,
2300
if gnutls.has_rawpk:
2301
fpr = ""
2302
try:
2303
key_id = self.key_id(
2304
self.peer_certificate(session))
2305
except (TypeError, gnutls.Error) as error:
2306
logger.warning("Bad certificate: %s", error)
2307
return
2308
logger.debug("Key ID: %s", key_id)
2309
2310
else:
2311
key_id = ""
2312
try:
2313
fpr = self.fingerprint(
2314
self.peer_certificate(session))
2315
except (TypeError, gnutls.Error) as error:
2316
logger.warning("Bad certificate: %s", error)
2317
return
2318
logger.debug("Fingerprint: %s", fpr)
2319
2320
try:
2321
client = ProxyClient(child_pipe, key_id, fpr,
1704
2322
self.client_address)
1705
2323
except KeyError:
1706
2324
return
1707
2325
1708
2326
if client.approval_delay:
1709
2327
delay = client.approval_delay
1710
2328
client.approvals_pending += 1
1711
2329
approval_required = True
1712
2330
1713
2331
while True:
1714
2332
if not client.enabled:
1715
2333
logger.info("Client %s is disabled",
1716
client.name)
2334
client.name)
1717
2335
if self.server.use_dbus:
1718
2336
# Emit D-Bus signal
1719
2337
client.Rejected("Disabled")
1720
2338
return
1721
2339
1722
2340
if client.approved or not client.approval_delay:
1723
#We are approved or approval is disabled
2341
# We are approved or approval is disabled
1724
2342
break
1725
2343
elif client.approved is None:
1726
2344
logger.info("Client %s needs approval",
1728
2346
if self.server.use_dbus:
1729
2347
# Emit D-Bus signal
1730
2348
client.NeedApproval(
1731
client.approval_delay_milliseconds(),
1732
client.approved_by_default)
2349
client.approval_delay.total_seconds()
2350
* 1000, client.approved_by_default)
1733
2351
else:
1734
2352
logger.warning("Client %s was not approved",
1735
2353
client.name)
1737
2355
# Emit D-Bus signal
1738
2356
client.Rejected("Denied")
1739
2357
return
1740
1741
#wait until timeout or approved
2358
2359
# wait until timeout or approved
1742
2360
time = datetime.datetime.now()
1743
2361
client.changedstate.acquire()
1744
client.changedstate.wait(
1745
float(timedelta_to_milliseconds(delay)
1746
/ 1000))
2362
client.changedstate.wait(delay.total_seconds())
1747
2363
client.changedstate.release()
1748
2364
time2 = datetime.datetime.now()
1749
2365
if (time2 - time) >= delay:
1759
2375
break
1760
2376
else:
1761
2377
delay -= time2 - time
1762
1763
sent_size = 0
1764
while sent_size < len(client.secret):
1765
try:
1766
sent = session.send(client.secret[sent_size:])
1767
except gnutls.errors.GNUTLSError as error:
1768
logger.warning("gnutls send failed",
1769
exc_info=error)
1770
return
1771
logger.debug("Sent: %d, remaining: %d",
1772
sent, len(client.secret)
1773
- (sent_size + sent))
1774
sent_size += sent
1775
2378
2379
try:
2380
session.send(client.secret)
2381
except gnutls.Error as error:
2382
logger.warning("gnutls send failed",
2383
exc_info=error)
2384
return
2385
1776
2386
logger.info("Sending secret to %s", client.name)
1777
2387
# bump the timeout using extended_timeout
1778
2388
client.bump_timeout(client.extended_timeout)
1779
2389
if self.server.use_dbus:
1780
2390
# Emit D-Bus signal
1781
2391
client.GotSecret()
1782
2392
1783
2393
finally:
1784
2394
if approval_required:
1785
2395
client.approvals_pending -= 1
1786
2396
try:
1787
2397
session.bye()
1788
except gnutls.errors.GNUTLSError as error:
2398
except gnutls.Error as error:
1789
2399
logger.warning("GnuTLS bye failed",
1790
2400
exc_info=error)
1791
2401
1792
2402
@staticmethod
1793
2403
def peer_certificate(session):
1794
"Return the peer's OpenPGP certificate as a bytestring"
1795
# If not an OpenPGP certificate...
1796
if (gnutls.library.functions
1797
.gnutls_certificate_type_get(session._c_object)
1798
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1799
# ...do the normal thing
1800
return session.peer_certificate
2404
"Return the peer's certificate as a bytestring"
2405
try:
2406
cert_type = gnutls.certificate_type_get2(session._c_object,
2407
gnutls.CTYPE_PEERS)
2408
except AttributeError:
2409
cert_type = gnutls.certificate_type_get(session._c_object)
2410
if gnutls.has_rawpk:
2411
valid_cert_types = frozenset((gnutls.CRT_RAWPK,))
2412
else:
2413
valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))
2414
# If not a valid certificate type...
2415
if cert_type not in valid_cert_types:
2416
logger.info("Cert type %r not in %r", cert_type,
2417
valid_cert_types)
2418
# ...return invalid data
2419
return b""
1801
2420
list_size = ctypes.c_uint(1)
1802
cert_list = (gnutls.library.functions
1803
.gnutls_certificate_get_peers
2421
cert_list = (gnutls.certificate_get_peers
1804
2422
(session._c_object, ctypes.byref(list_size)))
1805
2423
if not bool(cert_list) and list_size.value != 0:
1806
raise gnutls.errors.GNUTLSError("error getting peer"
1807
" certificate")
2424
raise gnutls.Error("error getting peer certificate")
1808
2425
if list_size.value == 0:
1809
2426
return None
1810
2427
cert = cert_list[0]
1811
2428
return ctypes.string_at(cert.data, cert.size)
1812
2429
2430
@staticmethod
2431
def key_id(certificate):
2432
"Convert a certificate bytestring to a hexdigit key ID"
2433
# New GnuTLS "datum" with the public key
2434
datum = gnutls.datum_t(
2435
ctypes.cast(ctypes.c_char_p(certificate),
2436
ctypes.POINTER(ctypes.c_ubyte)),
2437
ctypes.c_uint(len(certificate)))
2438
# XXX all these need to be created in the gnutls "module"
2439
# New empty GnuTLS certificate
2440
pubkey = gnutls.pubkey_t()
2441
gnutls.pubkey_init(ctypes.byref(pubkey))
2442
# Import the raw public key into the certificate
2443
gnutls.pubkey_import(pubkey,
2444
ctypes.byref(datum),
2445
gnutls.X509_FMT_DER)
2446
# New buffer for the key ID
2447
buf = ctypes.create_string_buffer(32)
2448
buf_len = ctypes.c_size_t(len(buf))
2449
# Get the key ID from the raw public key into the buffer
2450
gnutls.pubkey_get_key_id(pubkey,
2451
gnutls.KEYID_USE_SHA256,
2452
ctypes.cast(ctypes.byref(buf),
2453
ctypes.POINTER(ctypes.c_ubyte)),
2454
ctypes.byref(buf_len))
2455
# Deinit the certificate
2456
gnutls.pubkey_deinit(pubkey)
2457
2458
# Convert the buffer to a Python bytestring
2459
key_id = ctypes.string_at(buf, buf_len.value)
2460
# Convert the bytestring to hexadecimal notation
2461
hex_key_id = binascii.hexlify(key_id).upper()
2462
return hex_key_id
2463
1813
2464
@staticmethod
1814
2465
def fingerprint(openpgp):
1815
2466
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1816
2467
# New GnuTLS "datum" with the OpenPGP public key
1817
datum = (gnutls.library.types
1818
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1819
ctypes.POINTER
1820
(ctypes.c_ubyte)),
1821
ctypes.c_uint(len(openpgp))))
2468
datum = gnutls.datum_t(
2469
ctypes.cast(ctypes.c_char_p(openpgp),
2470
ctypes.POINTER(ctypes.c_ubyte)),
2471
ctypes.c_uint(len(openpgp)))
1822
2472
# New empty GnuTLS certificate
1823
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1824
(gnutls.library.functions
1825
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
2473
crt = gnutls.openpgp_crt_t()
2474
gnutls.openpgp_crt_init(ctypes.byref(crt))
1826
2475
# Import the OpenPGP public key into the certificate
1827
(gnutls.library.functions
1828
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1829
gnutls.library.constants
1830
.GNUTLS_OPENPGP_FMT_RAW))
2476
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2477
gnutls.OPENPGP_FMT_RAW)
1831
2478
# Verify the self signature in the key
1832
2479
crtverify = ctypes.c_uint()
1833
(gnutls.library.functions
1834
.gnutls_openpgp_crt_verify_self(crt, 0,
1835
ctypes.byref(crtverify)))
2480
gnutls.openpgp_crt_verify_self(crt, 0,
2481
ctypes.byref(crtverify))
1836
2482
if crtverify.value != 0:
1837
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1838
raise (gnutls.errors.CertificateSecurityError
1839
("Verify failed"))
2483
gnutls.openpgp_crt_deinit(crt)
2484
raise gnutls.CertificateSecurityError(code
2485
=crtverify.value)
1840
2486
# New buffer for the fingerprint
1841
2487
buf = ctypes.create_string_buffer(20)
1842
2488
buf_len = ctypes.c_size_t()
1843
2489
# Get the fingerprint from the certificate into the buffer
1844
(gnutls.library.functions
1845
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1846
ctypes.byref(buf_len)))
2490
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2491
ctypes.byref(buf_len))
1847
2492
# Deinit the certificate
1848
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2493
gnutls.openpgp_crt_deinit(crt)
1849
2494
# Convert the buffer to a Python bytestring
1850
2495
fpr = ctypes.string_at(buf, buf_len.value)
1851
2496
# Convert the bytestring to hexadecimal notation
1855
2500
1856
2501
class MultiprocessingMixIn(object):
1857
2502
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2503
1858
2504
def sub_process_main(self, request, address):
1859
2505
try:
1860
2506
self.finish_request(request, address)
1861
2507
except Exception:
1862
2508
self.handle_error(request, address)
1863
2509
self.close_request(request)
1864
2510
1865
2511
def process_request(self, request, address):
1866
2512
"""Start a new process to process the request."""
1867
proc = multiprocessing.Process(target = self.sub_process_main,
1868
args = (request, address))
2513
proc = multiprocessing.Process(target=self.sub_process_main,
2514
args=(request, address))
1869
2515
proc.start()
1870
2516
return proc
1871
2517
1872
2518
1873
2519
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1874
2520
""" adds a pipe to the MixIn """
2521
1875
2522
def process_request(self, request, client_address):
1876
2523
"""Overrides and wraps the original process_request().
1877
2524
1878
2525
This function creates a new pipe in self.pipe
1879
2526
"""
1880
2527
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1881
2528
1882
2529
proc = MultiprocessingMixIn.process_request(self, request,
1883
2530
client_address)
1884
2531
self.child_pipe.close()
1885
2532
self.add_pipe(parent_pipe, proc)
1886
2533
1887
2534
def add_pipe(self, parent_pipe, proc):
1888
2535
"""Dummy function; override as necessary"""
1889
raise NotImplementedError
2536
raise NotImplementedError()
1890
2537
1891
2538
1892
2539
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1893
2540
socketserver.TCPServer, object):
1894
2541
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1895
2542
1896
2543
Attributes:
1897
2544
enabled: Boolean; whether this server is activated yet
1898
2545
interface: None or a network interface name (string)
1899
2546
use_ipv6: Boolean; to use IPv6 or not
1900
2547
"""
2548
1901
2549
def __init__(self, server_address, RequestHandlerClass,
1902
interface=None, use_ipv6=True, socketfd=None):
2550
interface=None,
2551
use_ipv6=True,
2552
socketfd=None):
1903
2553
"""If socketfd is set, use that file descriptor instead of
1904
2554
creating a new one with socket.socket().
1905
2555
"""
1911
2561
self.socketfd = socketfd
1912
2562
# Save the original socket.socket() function
1913
2563
self.socket_socket = socket.socket
2564
1914
2565
# To implement --socket, we monkey patch socket.socket.
1915
#
2566
#
1916
2567
# (When socketserver.TCPServer is a new-style class, we
1917
2568
# could make self.socket into a property instead of monkey
1918
2569
# patching socket.socket.)
1919
#
2570
#
1920
2571
# Create a one-time-only replacement for socket.socket()
1921
2572
@functools.wraps(socket.socket)
1922
2573
def socket_wrapper(*args, **kwargs):
1934
2585
# socket_wrapper(), if socketfd was set.
1935
2586
socketserver.TCPServer.__init__(self, server_address,
1936
2587
RequestHandlerClass)
1937
2588
1938
2589
def server_bind(self):
1939
2590
"""This overrides the normal server_bind() function
1940
2591
to bind to an interface if one was specified, and also NOT to
1941
2592
bind to an address or port if they were not specified."""
2593
global SO_BINDTODEVICE
1942
2594
if self.interface is not None:
1943
2595
if SO_BINDTODEVICE is None:
1944
logger.error("SO_BINDTODEVICE does not exist;"
1945
" cannot bind to interface %s",
1946
self.interface)
1947
else:
1948
try:
1949
self.socket.setsockopt(socket.SOL_SOCKET,
1950
SO_BINDTODEVICE,
1951
str(self.interface
1952
+ '\0'))
1953
except socket.error as error:
1954
if error.errno == errno.EPERM:
1955
logger.error("No permission to"
1956
" bind to interface %s",
1957
self.interface)
1958
elif error.errno == errno.ENOPROTOOPT:
1959
logger.error("SO_BINDTODEVICE not available;"
1960
" cannot bind to interface %s",
1961
self.interface)
1962
elif error.errno == errno.ENODEV:
1963
logger.error("Interface %s does not"
1964
" exist, cannot bind",
1965
self.interface)
1966
else:
1967
raise
2596
# Fall back to a hard-coded value which seems to be
2597
# common enough.
2598
logger.warning("SO_BINDTODEVICE not found, trying 25")
2599
SO_BINDTODEVICE = 25
2600
try:
2601
self.socket.setsockopt(
2602
socket.SOL_SOCKET, SO_BINDTODEVICE,
2603
(self.interface + "\0").encode("utf-8"))
2604
except socket.error as error:
2605
if error.errno == errno.EPERM:
2606
logger.error("No permission to bind to"
2607
" interface %s", self.interface)
2608
elif error.errno == errno.ENOPROTOOPT:
2609
logger.error("SO_BINDTODEVICE not available;"
2610
" cannot bind to interface %s",
2611
self.interface)
2612
elif error.errno == errno.ENODEV:
2613
logger.error("Interface %s does not exist,"
2614
" cannot bind", self.interface)
2615
else:
2616
raise
1968
2617
# Only bind(2) the socket if we really need to.
1969
2618
if self.server_address[0] or self.server_address[1]:
1970
2619
if not self.server_address[0]:
1971
2620
if self.address_family == socket.AF_INET6:
1972
any_address = "::" # in6addr_any
2621
any_address = "::" # in6addr_any
1973
2622
else:
1974
any_address = socket.INADDR_ANY
2623
any_address = "0.0.0.0" # INADDR_ANY
1975
2624
self.server_address = (any_address,
1976
2625
self.server_address[1])
1977
2626
elif not self.server_address[1]:
1978
self.server_address = (self.server_address[0],
1979
0)
2627
self.server_address = (self.server_address[0], 0)
1980
2628
# if self.interface:
1981
2629
# self.server_address = (self.server_address[0],
1982
2630
# 0, # port
1988
2636
1989
2637
class MandosServer(IPv6_TCPServer):
1990
2638
"""Mandos server.
1991
2639
1992
2640
Attributes:
1993
2641
clients: set of Client objects
1994
2642
gnutls_priority GnuTLS priority string
1995
2643
use_dbus: Boolean; to emit D-Bus signals or not
1996
1997
Assumes a gobject.MainLoop event loop.
2644
2645
Assumes a GLib.MainLoop event loop.
1998
2646
"""
2647
1999
2648
def __init__(self, server_address, RequestHandlerClass,
2000
interface=None, use_ipv6=True, clients=None,
2001
gnutls_priority=None, use_dbus=True, socketfd=None):
2649
interface=None,
2650
use_ipv6=True,
2651
clients=None,
2652
gnutls_priority=None,
2653
use_dbus=True,
2654
socketfd=None):
2002
2655
self.enabled = False
2003
2656
self.clients = clients
2004
2657
if self.clients is None:
2007
2660
self.gnutls_priority = gnutls_priority
2008
2661
IPv6_TCPServer.__init__(self, server_address,
2009
2662
RequestHandlerClass,
2010
interface = interface,
2011
use_ipv6 = use_ipv6,
2012
socketfd = socketfd)
2663
interface=interface,
2664
use_ipv6=use_ipv6,
2665
socketfd=socketfd)
2666
2013
2667
def server_activate(self):
2014
2668
if self.enabled:
2015
2669
return socketserver.TCPServer.server_activate(self)
2016
2670
2017
2671
def enable(self):
2018
2672
self.enabled = True
2019
2673
2020
2674
def add_pipe(self, parent_pipe, proc):
2021
2675
# Call "handle_ipc" for both data and EOF events
2022
gobject.io_add_watch(parent_pipe.fileno(),
2023
gobject.IO_IN | gobject.IO_HUP,
2024
functools.partial(self.handle_ipc,
2025
parent_pipe =
2026
parent_pipe,
2027
proc = proc))
2028
2029
def handle_ipc(self, source, condition, parent_pipe=None,
2030
proc = None, client_object=None):
2676
GLib.io_add_watch(
2677
parent_pipe.fileno(),
2678
GLib.IO_IN | GLib.IO_HUP,
2679
functools.partial(self.handle_ipc,
2680
parent_pipe=parent_pipe,
2681
proc=proc))
2682
2683
def handle_ipc(self, source, condition,
2684
parent_pipe=None,
2685
proc=None,
2686
client_object=None):
2031
2687
# error, or the other end of multiprocessing.Pipe has closed
2032
if condition & (gobject.IO_ERR | gobject.IO_HUP):
2688
if condition & (GLib.IO_ERR | GLib.IO_HUP):
2033
2689
# Wait for other process to exit
2034
2690
proc.join()
2035
2691
return False
2036
2692
2037
2693
# Read a request from the child
2038
2694
request = parent_pipe.recv()
2039
2695
command = request[0]
2040
2696
2041
2697
if command == 'init':
2042
fpr = request[1]
2043
address = request[2]
2044
2045
for c in self.clients.itervalues():
2046
if c.fingerprint == fpr:
2698
key_id = request[1].decode("ascii")
2699
fpr = request[2].decode("ascii")
2700
address = request[3]
2701
2702
for c in self.clients.values():
2703
if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":
2704
continue
2705
if key_id and c.key_id == key_id:
2706
client = c
2707
break
2708
if fpr and c.fingerprint == fpr:
2047
2709
client = c
2048
2710
break
2049
2711
else:
2050
logger.info("Client not found for fingerprint: %s, ad"
2051
"dress: %s", fpr, address)
2712
logger.info("Client not found for key ID: %s, address"
2713
": %s", key_id or fpr, address)
2052
2714
if self.use_dbus:
2053
2715
# Emit D-Bus signal
2054
mandos_dbus_service.ClientNotFound(fpr,
2716
mandos_dbus_service.ClientNotFound(key_id or fpr,
2055
2717
address[0])
2056
2718
parent_pipe.send(False)
2057
2719
return False
2058
2059
gobject.io_add_watch(parent_pipe.fileno(),
2060
gobject.IO_IN | gobject.IO_HUP,
2061
functools.partial(self.handle_ipc,
2062
parent_pipe =
2063
parent_pipe,
2064
proc = proc,
2065
client_object =
2066
client))
2720
2721
GLib.io_add_watch(
2722
parent_pipe.fileno(),
2723
GLib.IO_IN | GLib.IO_HUP,
2724
functools.partial(self.handle_ipc,
2725
parent_pipe=parent_pipe,
2726
proc=proc,
2727
client_object=client))
2067
2728
parent_pipe.send(True)
2068
2729
# remove the old hook in favor of the new above hook on
2069
2730
# same fileno
2072
2733
funcname = request[1]
2073
2734
args = request[2]
2074
2735
kwargs = request[3]
2075
2736
2076
2737
parent_pipe.send(('data', getattr(client_object,
2077
2738
funcname)(*args,
2078
**kwargs)))
2079
2739
**kwargs)))
2740
2080
2741
if command == 'getattr':
2081
2742
attrname = request[1]
2082
if callable(client_object.__getattribute__(attrname)):
2083
parent_pipe.send(('function',))
2743
if isinstance(client_object.__getattribute__(attrname),
2744
collections.Callable):
2745
parent_pipe.send(('function', ))
2084
2746
else:
2085
parent_pipe.send(('data', client_object
2086
.__getattribute__(attrname)))
2087
2747
parent_pipe.send((
2748
'data', client_object.__getattribute__(attrname)))
2749
2088
2750
if command == 'setattr':
2089
2751
attrname = request[1]
2090
2752
value = request[2]
2091
2753
setattr(client_object, attrname, value)
2092
2754
2093
2755
return True
2094
2756
2095
2757
2758
def rfc3339_duration_to_delta(duration):
2759
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2760
2761
>>> rfc3339_duration_to_delta("P7D")
2762
datetime.timedelta(7)
2763
>>> rfc3339_duration_to_delta("PT60S")
2764
datetime.timedelta(0, 60)
2765
>>> rfc3339_duration_to_delta("PT60M")
2766
datetime.timedelta(0, 3600)
2767
>>> rfc3339_duration_to_delta("PT24H")
2768
datetime.timedelta(1)
2769
>>> rfc3339_duration_to_delta("P1W")
2770
datetime.timedelta(7)
2771
>>> rfc3339_duration_to_delta("PT5M30S")
2772
datetime.timedelta(0, 330)
2773
>>> rfc3339_duration_to_delta("P1DT3M20S")
2774
datetime.timedelta(1, 200)
2775
"""
2776
2777
# Parsing an RFC 3339 duration with regular expressions is not
2778
# possible - there would have to be multiple places for the same
2779
# values, like seconds. The current code, while more esoteric, is
2780
# cleaner without depending on a parsing library. If Python had a
2781
# built-in library for parsing we would use it, but we'd like to
2782
# avoid excessive use of external libraries.
2783
2784
# New type for defining tokens, syntax, and semantics all-in-one
2785
Token = collections.namedtuple("Token", (
2786
"regexp", # To match token; if "value" is not None, must have
2787
# a "group" containing digits
2788
"value", # datetime.timedelta or None
2789
"followers")) # Tokens valid after this token
2790
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2791
# the "duration" ABNF definition in RFC 3339, Appendix A.
2792
token_end = Token(re.compile(r"$"), None, frozenset())
2793
token_second = Token(re.compile(r"(\d+)S"),
2794
datetime.timedelta(seconds=1),
2795
frozenset((token_end, )))
2796
token_minute = Token(re.compile(r"(\d+)M"),
2797
datetime.timedelta(minutes=1),
2798
frozenset((token_second, token_end)))
2799
token_hour = Token(re.compile(r"(\d+)H"),
2800
datetime.timedelta(hours=1),
2801
frozenset((token_minute, token_end)))
2802
token_time = Token(re.compile(r"T"),
2803
None,
2804
frozenset((token_hour, token_minute,
2805
token_second)))
2806
token_day = Token(re.compile(r"(\d+)D"),
2807
datetime.timedelta(days=1),
2808
frozenset((token_time, token_end)))
2809
token_month = Token(re.compile(r"(\d+)M"),
2810
datetime.timedelta(weeks=4),
2811
frozenset((token_day, token_end)))
2812
token_year = Token(re.compile(r"(\d+)Y"),
2813
datetime.timedelta(weeks=52),
2814
frozenset((token_month, token_end)))
2815
token_week = Token(re.compile(r"(\d+)W"),
2816
datetime.timedelta(weeks=1),
2817
frozenset((token_end, )))
2818
token_duration = Token(re.compile(r"P"), None,
2819
frozenset((token_year, token_month,
2820
token_day, token_time,
2821
token_week)))
2822
# Define starting values:
2823
# Value so far
2824
value = datetime.timedelta()
2825
found_token = None
2826
# Following valid tokens
2827
followers = frozenset((token_duration, ))
2828
# String left to parse
2829
s = duration
2830
# Loop until end token is found
2831
while found_token is not token_end:
2832
# Search for any currently valid tokens
2833
for token in followers:
2834
match = token.regexp.match(s)
2835
if match is not None:
2836
# Token found
2837
if token.value is not None:
2838
# Value found, parse digits
2839
factor = int(match.group(1), 10)
2840
# Add to value so far
2841
value += factor * token.value
2842
# Strip token from string
2843
s = token.regexp.sub("", s, 1)
2844
# Go to found token
2845
found_token = token
2846
# Set valid next tokens
2847
followers = found_token.followers
2848
break
2849
else:
2850
# No currently valid tokens were found
2851
raise ValueError("Invalid RFC 3339 duration: {!r}"
2852
.format(duration))
2853
# End token found
2854
return value
2855
2856
2096
2857
def string_to_delta(interval):
2097
2858
"""Parse a string and return a datetime.timedelta
2098
2859
2099
2860
>>> string_to_delta('7d')
2100
2861
datetime.timedelta(7)
2101
2862
>>> string_to_delta('60s')
2109
2870
>>> string_to_delta('5m 30s')
2110
2871
datetime.timedelta(0, 330)
2111
2872
"""
2873
2874
try:
2875
return rfc3339_duration_to_delta(interval)
2876
except ValueError:
2877
pass
2878
2112
2879
timevalue = datetime.timedelta(0)
2113
2880
for s in interval.split():
2114
2881
try:
2115
suffix = unicode(s[-1])
2882
suffix = s[-1]
2116
2883
value = int(s[:-1])
2117
2884
if suffix == "d":
2118
2885
delta = datetime.timedelta(value)
2125
2892
elif suffix == "w":
2126
2893
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
2127
2894
else:
2128
raise ValueError("Unknown suffix {0!r}"
2129
.format(suffix))
2130
except (ValueError, IndexError) as e:
2895
raise ValueError("Unknown suffix {!r}".format(suffix))
2896
except IndexError as e:
2131
2897
raise ValueError(*(e.args))
2132
2898
timevalue += delta
2133
2899
return timevalue
2134
2900
2135
2901
2136
def daemon(nochdir = False, noclose = False):
2902
def daemon(nochdir=False, noclose=False):
2137
2903
"""See daemon(3). Standard BSD Unix function.
2138
2904
2139
2905
This should really exist as os.daemon, but it doesn't (yet)."""
2140
2906
if os.fork():
2141
2907
sys.exit()
2149
2915
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2150
2916
if not stat.S_ISCHR(os.fstat(null).st_mode):
2151
2917
raise OSError(errno.ENODEV,
2152
"{0} not a character device"
2918
"{} not a character device"
2153
2919
.format(os.devnull))
2154
2920
os.dup2(null, sys.stdin.fileno())
2155
2921
os.dup2(null, sys.stdout.fileno())
2159
2925
2160
2926
2161
2927
def main():
2162
2928
2163
2929
##################################################################
2164
2930
# Parsing of options, both command line and config file
2165
2931
2166
2932
parser = argparse.ArgumentParser()
2167
2933
parser.add_argument("-v", "--version", action="version",
2168
version = "%(prog)s {0}".format(version),
2934
version="%(prog)s {}".format(version),
2169
2935
help="show version number and exit")
2170
2936
parser.add_argument("-i", "--interface", metavar="IF",
2171
2937
help="Bind to interface IF")
2177
2943
help="Run self-test")
2178
2944
parser.add_argument("--debug", action="store_true",
2179
2945
help="Debug mode; run in foreground and log"
2180
" to terminal")
2946
" to terminal", default=None)
2181
2947
parser.add_argument("--debuglevel", metavar="LEVEL",
2182
2948
help="Debug level for stdout output")
2183
2949
parser.add_argument("--priority", help="GnuTLS"
2190
2956
" files")
2191
2957
parser.add_argument("--no-dbus", action="store_false",
2192
2958
dest="use_dbus", help="Do not provide D-Bus"
2193
" system bus interface")
2959
" system bus interface", default=None)
2194
2960
parser.add_argument("--no-ipv6", action="store_false",
2195
dest="use_ipv6", help="Do not use IPv6")
2961
dest="use_ipv6", help="Do not use IPv6",
2962
default=None)
2196
2963
parser.add_argument("--no-restore", action="store_false",
2197
2964
dest="restore", help="Do not restore stored"
2198
" state")
2965
" state", default=None)
2199
2966
parser.add_argument("--socket", type=int,
2200
2967
help="Specify a file descriptor to a network"
2201
2968
" socket to use instead of creating one")
2202
2969
parser.add_argument("--statedir", metavar="DIR",
2203
2970
help="Directory to save/restore state in")
2204
2971
parser.add_argument("--foreground", action="store_true",
2972
help="Run in foreground", default=None)
2973
parser.add_argument("--no-zeroconf", action="store_false",
2974
dest="zeroconf", help="Do not use Zeroconf",
2975
default=None)
2976
2205
2977
options = parser.parse_args()
2206
2978
2207
2979
if options.check:
2208
2980
import doctest
2209
doctest.testmod()
2210
sys.exit()
2211
2981
fail_count, test_count = doctest.testmod()
2982
sys.exit(os.EX_OK if fail_count == 0 else 1)
2983
2212
2984
# Default values for config file for server-global settings
2213
server_defaults = { "interface": "",
2214
"address": "",
2215
"port": "",
2216
"debug": "False",
2217
"priority":
2218
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2219
"servicename": "Mandos",
2220
"use_dbus": "True",
2221
"use_ipv6": "True",
2222
"debuglevel": "",
2223
"restore": "True",
2224
"socket": "",
2225
"statedir": "/var/lib/mandos"
2226
}
2227
2985
if gnutls.has_rawpk:
2986
priority = ("SECURE128:!CTYPE-X.509:+CTYPE-RAWPK:!RSA"
2987
":!VERS-ALL:+VERS-TLS1.3:%PROFILE_ULTRA")
2988
else:
2989
priority = ("SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2990
":+SIGN-DSA-SHA256")
2991
server_defaults = {"interface": "",
2992
"address": "",
2993
"port": "",
2994
"debug": "False",
2995
"priority": priority,
2996
"servicename": "Mandos",
2997
"use_dbus": "True",
2998
"use_ipv6": "True",
2999
"debuglevel": "",
3000
"restore": "True",
3001
"socket": "",
3002
"statedir": "/var/lib/mandos",
3003
"foreground": "False",
3004
"zeroconf": "True",
3005
}
3006
del priority
3007
2228
3008
# Parse config file for server-global settings
2229
3009
server_config = configparser.SafeConfigParser(server_defaults)
2230
3010
del server_defaults
2231
server_config.read(os.path.join(options.configdir,
2232
"mandos.conf"))
3011
server_config.read(os.path.join(options.configdir, "mandos.conf"))
2233
3012
# Convert the SafeConfigParser object to a dict
2234
3013
server_settings = server_config.defaults()
2235
3014
# Use the appropriate methods on the non-string config options
2236
for option in ("debug", "use_dbus", "use_ipv6"):
3015
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3016
"foreground", "zeroconf"):
2237
3017
server_settings[option] = server_config.getboolean("DEFAULT",
2238
3018
option)
2239
3019
if server_settings["port"]:
2249
3029
server_settings["socket"] = os.dup(server_settings
2250
3030
["socket"])
2251
3031
del server_config
2252
3032
2253
3033
# Override the settings from the config file with command line
2254
3034
# options, if set.
2255
3035
for option in ("interface", "address", "port", "debug",
2256
"priority", "servicename", "configdir",
2257
"use_dbus", "use_ipv6", "debuglevel", "restore",
2258
"statedir", "socket"):
3036
"priority", "servicename", "configdir", "use_dbus",
3037
"use_ipv6", "debuglevel", "restore", "statedir",
3038
"socket", "foreground", "zeroconf"):
2259
3039
value = getattr(options, option)
2260
3040
if value is not None:
2261
3041
server_settings[option] = value
2262
3042
del options
2263
3043
# Force all strings to be unicode
2264
3044
for option in server_settings.keys():
2265
if type(server_settings[option]) is str:
2266
server_settings[option] = unicode(server_settings[option])
3045
if isinstance(server_settings[option], bytes):
3046
server_settings[option] = (server_settings[option]
3047
.decode("utf-8"))
3048
# Force all boolean options to be boolean
3049
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3050
"foreground", "zeroconf"):
3051
server_settings[option] = bool(server_settings[option])
3052
# Debug implies foreground
3053
if server_settings["debug"]:
3054
server_settings["foreground"] = True
2267
3055
# Now we have our good server settings in "server_settings"
2268
3056
2269
3057
##################################################################
2270
3058
3059
if (not server_settings["zeroconf"]
3060
and not (server_settings["port"]
3061
or server_settings["socket"] != "")):
3062
parser.error("Needs port or socket to work without Zeroconf")
3063
2271
3064
# For convenience
2272
3065
debug = server_settings["debug"]
2273
3066
debuglevel = server_settings["debuglevel"]
2275
3068
use_ipv6 = server_settings["use_ipv6"]
2276
3069
stored_state_path = os.path.join(server_settings["statedir"],
2277
3070
stored_state_file)
2278
3071
foreground = server_settings["foreground"]
3072
zeroconf = server_settings["zeroconf"]
3073
2279
3074
if debug:
2280
3075
initlogger(debug, logging.DEBUG)
2281
3076
else:
2284
3079
else:
2285
3080
level = getattr(logging, debuglevel.upper())
2286
3081
initlogger(debug, level)
2287
3082
2288
3083
if server_settings["servicename"] != "Mandos":
2289
syslogger.setFormatter(logging.Formatter
2290
('Mandos ({0}) [%(process)d]:'
2291
' %(levelname)s: %(message)s'
2292
.format(server_settings
2293
["servicename"])))
2294
3084
syslogger.setFormatter(
3085
logging.Formatter('Mandos ({}) [%(process)d]:'
3086
' %(levelname)s: %(message)s'.format(
3087
server_settings["servicename"])))
3088
2295
3089
# Parse config file with clients
2296
3090
client_config = configparser.SafeConfigParser(Client
2297
3091
.client_defaults)
2298
3092
client_config.read(os.path.join(server_settings["configdir"],
2299
3093
"clients.conf"))
2300
3094
2301
3095
global mandos_dbus_service
2302
3096
mandos_dbus_service = None
2303
2304
tcp_server = MandosServer((server_settings["address"],
2305
server_settings["port"]),
2306
ClientHandler,
2307
interface=(server_settings["interface"]
2308
or None),
2309
use_ipv6=use_ipv6,
2310
gnutls_priority=
2311
server_settings["priority"],
2312
use_dbus=use_dbus,
2313
socketfd=(server_settings["socket"]
2314
or None))
2315
if not debug:
2316
pidfilename = "/var/run/mandos.pid"
3097
3098
socketfd = None
3099
if server_settings["socket"] != "":
3100
socketfd = server_settings["socket"]
3101
tcp_server = MandosServer(
3102
(server_settings["address"], server_settings["port"]),
3103
ClientHandler,
3104
interface=(server_settings["interface"] or None),
3105
use_ipv6=use_ipv6,
3106
gnutls_priority=server_settings["priority"],
3107
use_dbus=use_dbus,
3108
socketfd=socketfd)
3109
if not foreground:
3110
pidfilename = "/run/mandos.pid"
3111
if not os.path.isdir("/run/."):
3112
pidfilename = "/var/run/mandos.pid"
3113
pidfile = None
2317
3114
try:
2318
pidfile = open(pidfilename, "w")
3115
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
2319
3116
except IOError as e:
2320
3117
logger.error("Could not open file %r", pidfilename,
2321
3118
exc_info=e)
2322
2323
for name in ("_mandos", "mandos", "nobody"):
3119
3120
for name, group in (("_mandos", "_mandos"),
3121
("mandos", "mandos"),
3122
("nobody", "nogroup")):
2324
3123
try:
2325
3124
uid = pwd.getpwnam(name).pw_uid
2326
gid = pwd.getpwnam(name).pw_gid
3125
gid = pwd.getpwnam(group).pw_gid
2327
3126
break
2328
3127
except KeyError:
2329
3128
continue
2333
3132
try:
2334
3133
os.setgid(gid)
2335
3134
os.setuid(uid)
3135
if debug:
3136
logger.debug("Did setuid/setgid to {}:{}".format(uid,
3137
gid))
2336
3138
except OSError as error:
3139
logger.warning("Failed to setuid/setgid to {}:{}: {}"
3140
.format(uid, gid, os.strerror(error.errno)))
2337
3141
if error.errno != errno.EPERM:
2338
raise error
2339
3142
raise
3143
2340
3144
if debug:
2341
3145
# Enable all possible GnuTLS debugging
2342
3146
2343
3147
# "Use a log level over 10 to enable all debugging options."
2344
3148
# - GnuTLS manual
2345
gnutls.library.functions.gnutls_global_set_log_level(11)
2346
2347
@gnutls.library.types.gnutls_log_func
3149
gnutls.global_set_log_level(11)
3150
3151
@gnutls.log_func
2348
3152
def debug_gnutls(level, string):
2349
3153
logger.debug("GnuTLS: %s", string[:-1])
2350
2351
(gnutls.library.functions
2352
.gnutls_global_set_log_function(debug_gnutls))
2353
3154
3155
gnutls.global_set_log_function(debug_gnutls)
3156
2354
3157
# Redirect stdin so all checkers get /dev/null
2355
3158
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2356
3159
os.dup2(null, sys.stdin.fileno())
2357
3160
if null > 2:
2358
3161
os.close(null)
2359
3162
2360
3163
# Need to fork before connecting to D-Bus
2361
if not debug:
3164
if not foreground:
2362
3165
# Close all input and output, do double fork, etc.
2363
3166
daemon()
2364
2365
# multiprocessing will use threads, so before we use gobject we
2366
# need to inform gobject that threads will be used.
2367
gobject.threads_init()
2368
3167
3168
# multiprocessing will use threads, so before we use GLib we need
3169
# to inform GLib that threads will be used.
3170
GLib.threads_init()
3171
2369
3172
global main_loop
2370
3173
# From the Avahi example code
2371
3174
DBusGMainLoop(set_as_default=True)
2372
main_loop = gobject.MainLoop()
3175
main_loop = GLib.MainLoop()
2373
3176
bus = dbus.SystemBus()
2374
3177
# End of Avahi example code
2375
3178
if use_dbus:
2376
3179
try:
2377
3180
bus_name = dbus.service.BusName("se.recompile.Mandos",
2378
bus, do_not_queue=True)
2379
old_bus_name = (dbus.service.BusName
2380
("se.bsnet.fukt.Mandos", bus,
2381
do_not_queue=True))
2382
except dbus.exceptions.NameExistsException as e:
3181
bus,
3182
do_not_queue=True)
3183
old_bus_name = dbus.service.BusName(
3184
"se.bsnet.fukt.Mandos", bus,
3185
do_not_queue=True)
3186
except dbus.exceptions.DBusException as e:
2383
3187
logger.error("Disabling D-Bus:", exc_info=e)
2384
3188
use_dbus = False
2385
3189
server_settings["use_dbus"] = False
2386
3190
tcp_server.use_dbus = False
2387
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2388
service = AvahiServiceToSyslog(name =
2389
server_settings["servicename"],
2390
servicetype = "_mandos._tcp",
2391
protocol = protocol, bus = bus)
2392
if server_settings["interface"]:
2393
service.interface = (if_nametoindex
2394
(str(server_settings["interface"])))
2395
3191
if zeroconf:
3192
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3193
service = AvahiServiceToSyslog(
3194
name=server_settings["servicename"],
3195
servicetype="_mandos._tcp",
3196
protocol=protocol,
3197
bus=bus)
3198
if server_settings["interface"]:
3199
service.interface = if_nametoindex(
3200
server_settings["interface"].encode("utf-8"))
3201
2396
3202
global multiprocessing_manager
2397
3203
multiprocessing_manager = multiprocessing.Manager()
2398
3204
2399
3205
client_class = Client
2400
3206
if use_dbus:
2401
client_class = functools.partial(ClientDBus, bus = bus)
2402
3207
client_class = functools.partial(ClientDBus, bus=bus)
3208
2403
3209
client_settings = Client.config_parser(client_config)
2404
3210
old_client_settings = {}
2405
3211
clients_data = {}
2406
3212
3213
# This is used to redirect stdout and stderr for checker processes
3214
global wnull
3215
wnull = open(os.devnull, "w") # A writable /dev/null
3216
# Only used if server is running in foreground but not in debug
3217
# mode
3218
if debug or not foreground:
3219
wnull.close()
3220
2407
3221
# Get client data and settings from last running state.
2408
3222
if server_settings["restore"]:
2409
3223
try:
2410
3224
with open(stored_state_path, "rb") as stored_state:
2411
clients_data, old_client_settings = (pickle.load
2412
(stored_state))
3225
if sys.version_info.major == 2:
3226
clients_data, old_client_settings = pickle.load(
3227
stored_state)
3228
else:
3229
bytes_clients_data, bytes_old_client_settings = (
3230
pickle.load(stored_state, encoding="bytes"))
3231
# Fix bytes to strings
3232
# clients_data
3233
# .keys()
3234
clients_data = {(key.decode("utf-8")
3235
if isinstance(key, bytes)
3236
else key): value
3237
for key, value in
3238
bytes_clients_data.items()}
3239
del bytes_clients_data
3240
for key in clients_data:
3241
value = {(k.decode("utf-8")
3242
if isinstance(k, bytes) else k): v
3243
for k, v in
3244
clients_data[key].items()}
3245
clients_data[key] = value
3246
# .client_structure
3247
value["client_structure"] = [
3248
(s.decode("utf-8")
3249
if isinstance(s, bytes)
3250
else s) for s in
3251
value["client_structure"]]
3252
# .name & .host
3253
for k in ("name", "host"):
3254
if isinstance(value[k], bytes):
3255
value[k] = value[k].decode("utf-8")
3256
if not value.has_key("key_id"):
3257
value["key_id"] = ""
3258
elif not value.has_key("fingerprint"):
3259
value["fingerprint"] = ""
3260
# old_client_settings
3261
# .keys()
3262
old_client_settings = {
3263
(key.decode("utf-8")
3264
if isinstance(key, bytes)
3265
else key): value
3266
for key, value in
3267
bytes_old_client_settings.items()}
3268
del bytes_old_client_settings
3269
# .host
3270
for value in old_client_settings.values():
3271
if isinstance(value["host"], bytes):
3272
value["host"] = (value["host"]
3273
.decode("utf-8"))
2413
3274
os.remove(stored_state_path)
2414
3275
except IOError as e:
2415
3276
if e.errno == errno.ENOENT:
2416
logger.warning("Could not load persistent state: {0}"
2417
.format(os.strerror(e.errno)))
3277
logger.warning("Could not load persistent state:"
3278
" {}".format(os.strerror(e.errno)))
2418
3279
else:
2419
3280
logger.critical("Could not load persistent state:",
2420
3281
exc_info=e)
2421
3282
raise
2422
3283
except EOFError as e:
2423
3284
logger.warning("Could not load persistent state: "
2424
"EOFError:", exc_info=e)
2425
3285
"EOFError:",
3286
exc_info=e)
3287
2426
3288
with PGPEngine() as pgp:
2427
for client_name, client in clients_data.iteritems():
3289
for client_name, client in clients_data.items():
3290
# Skip removed clients
3291
if client_name not in client_settings:
3292
continue
3293
2428
3294
# Decide which value to use after restoring saved state.
2429
3295
# We have three different values: Old config file,
2430
3296
# new config file, and saved state.
2435
3301
# For each value in new config, check if it
2436
3302
# differs from the old config value (Except for
2437
3303
# the "secret" attribute)
2438
if (name != "secret" and
2439
value != old_client_settings[client_name]
2440
[name]):
3304
if (name != "secret"
3305
and (value !=
3306
old_client_settings[client_name][name])):
2441
3307
client[name] = value
2442
3308
except KeyError:
2443
3309
pass
2444
3310
2445
3311
# Clients who has passed its expire date can still be
2446
# enabled if its last checker was successful. Clients
3312
# enabled if its last checker was successful. A Client
2447
3313
# whose checker succeeded before we stored its state is
2448
3314
# assumed to have successfully run all checkers during
2449
3315
# downtime.
2451
3317
if datetime.datetime.utcnow() >= client["expires"]:
2452
3318
if not client["last_checked_ok"]:
2453
3319
logger.warning(
2454
"disabling client {0} - Client never "
2455
"performed a successful checker"
2456
.format(client_name))
3320
"disabling client {} - Client never "
3321
"performed a successful checker".format(
3322
client_name))
2457
3323
client["enabled"] = False
2458
3324
elif client["last_checker_status"] != 0:
2459
3325
logger.warning(
2460
"disabling client {0} - Client "
2461
"last checker failed with error code {1}"
2462
.format(client_name,
2463
client["last_checker_status"]))
3326
"disabling client {} - Client last"
3327
" checker failed with error code"
3328
" {}".format(
3329
client_name,
3330
client["last_checker_status"]))
2464
3331
client["enabled"] = False
2465
3332
else:
2466
client["expires"] = (datetime.datetime
2467
.utcnow()
2468
+ client["timeout"])
3333
client["expires"] = (
3334
datetime.datetime.utcnow()
3335
+ client["timeout"])
2469
3336
logger.debug("Last checker succeeded,"
2470
" keeping {0} enabled"
2471
.format(client_name))
3337
" keeping {} enabled".format(
3338
client_name))
2472
3339
try:
2473
client["secret"] = (
2474
pgp.decrypt(client["encrypted_secret"],
2475
client_settings[client_name]
2476
["secret"]))
3340
client["secret"] = pgp.decrypt(
3341
client["encrypted_secret"],
3342
client_settings[client_name]["secret"])
2477
3343
except PGPError:
2478
3344
# If decryption fails, we use secret from new settings
2479
logger.debug("Failed to decrypt {0} old secret"
2480
.format(client_name))
2481
client["secret"] = (
2482
client_settings[client_name]["secret"])
2483
3345
logger.debug("Failed to decrypt {} old secret".format(
3346
client_name))
3347
client["secret"] = (client_settings[client_name]
3348
["secret"])
3349
2484
3350
# Add/remove clients based on new changes made to config
2485
3351
for client_name in (set(old_client_settings)
2486
3352
- set(client_settings)):
2488
3354
for client_name in (set(client_settings)
2489
3355
- set(old_client_settings)):
2490
3356
clients_data[client_name] = client_settings[client_name]
2491
3357
2492
3358
# Create all client objects
2493
for client_name, client in clients_data.iteritems():
3359
for client_name, client in clients_data.items():
2494
3360
tcp_server.clients[client_name] = client_class(
2495
name = client_name, settings = client)
2496
3361
name=client_name,
3362
settings=client,
3363
server_settings=server_settings)
3364
2497
3365
if not tcp_server.clients:
2498
3366
logger.warning("No clients defined")
2499
2500
if not debug:
2501
try:
2502
with pidfile:
2503
pid = os.getpid()
2504
pidfile.write(str(pid) + "\n".encode("utf-8"))
2505
del pidfile
2506
except IOError:
2507
logger.error("Could not write to file %r with PID %d",
2508
pidfilename, pid)
2509
except NameError:
2510
# "pidfile" was never created
2511
pass
3367
3368
if not foreground:
3369
if pidfile is not None:
3370
pid = os.getpid()
3371
try:
3372
with pidfile:
3373
print(pid, file=pidfile)
3374
except IOError:
3375
logger.error("Could not write to file %r with PID %d",
3376
pidfilename, pid)
3377
del pidfile
2512
3378
del pidfilename
2513
2514
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2515
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2516
3379
3380
for termsig in (signal.SIGHUP, signal.SIGTERM):
3381
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3382
lambda: main_loop.quit() and False)
3383
2517
3384
if use_dbus:
2518
@alternate_dbus_interfaces({"se.recompile.Mandos":
2519
"se.bsnet.fukt.Mandos"})
2520
class MandosDBusService(DBusObjectWithProperties):
3385
3386
@alternate_dbus_interfaces(
3387
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3388
class MandosDBusService(DBusObjectWithObjectManager):
2521
3389
"""A D-Bus proxy object"""
3390
2522
3391
def __init__(self):
2523
3392
dbus.service.Object.__init__(self, bus, "/")
3393
2524
3394
_interface = "se.recompile.Mandos"
2525
2526
@dbus_interface_annotations(_interface)
2527
def _foo(self):
2528
return { "org.freedesktop.DBus.Property"
2529
".EmitsChangedSignal":
2530
"false"}
2531
3395
2532
3396
@dbus.service.signal(_interface, signature="o")
2533
3397
def ClientAdded(self, objpath):
2534
3398
"D-Bus signal"
2535
3399
pass
2536
3400
2537
3401
@dbus.service.signal(_interface, signature="ss")
2538
def ClientNotFound(self, fingerprint, address):
3402
def ClientNotFound(self, key_id, address):
2539
3403
"D-Bus signal"
2540
3404
pass
2541
3405
3406
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3407
"true"})
2542
3408
@dbus.service.signal(_interface, signature="os")
2543
3409
def ClientRemoved(self, objpath, name):
2544
3410
"D-Bus signal"
2545
3411
pass
2546
3412
3413
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3414
"true"})
2547
3415
@dbus.service.method(_interface, out_signature="ao")
2548
3416
def GetAllClients(self):
2549
3417
"D-Bus method"
2550
return dbus.Array(c.dbus_object_path
2551
for c in
2552
tcp_server.clients.itervalues())
2553
3418
return dbus.Array(c.dbus_object_path for c in
3419
tcp_server.clients.values())
3420
3421
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3422
"true"})
2554
3423
@dbus.service.method(_interface,
2555
3424
out_signature="a{oa{sv}}")
2556
3425
def GetAllClientsWithProperties(self):
2557
3426
"D-Bus method"
2558
3427
return dbus.Dictionary(
2559
((c.dbus_object_path, c.GetAll(""))
2560
for c in tcp_server.clients.itervalues()),
3428
{c.dbus_object_path: c.GetAll(
3429
"se.recompile.Mandos.Client")
3430
for c in tcp_server.clients.values()},
2561
3431
signature="oa{sv}")
2562
3432
2563
3433
@dbus.service.method(_interface, in_signature="o")
2564
3434
def RemoveClient(self, object_path):
2565
3435
"D-Bus method"
2566
for c in tcp_server.clients.itervalues():
3436
for c in tcp_server.clients.values():
2567
3437
if c.dbus_object_path == object_path:
2568
3438
del tcp_server.clients[c.name]
2569
3439
c.remove_from_connection()
2570
# Don't signal anything except ClientRemoved
3440
# Don't signal the disabling
2571
3441
c.disable(quiet=True)
2572
# Emit D-Bus signal
2573
self.ClientRemoved(object_path, c.name)
3442
# Emit D-Bus signal for removal
3443
self.client_removed_signal(c)
2574
3444
return
2575
3445
raise KeyError(object_path)
2576
3446
2577
3447
del _interface
2578
3448
3449
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3450
out_signature="a{oa{sa{sv}}}")
3451
def GetManagedObjects(self):
3452
"""D-Bus method"""
3453
return dbus.Dictionary(
3454
{client.dbus_object_path:
3455
dbus.Dictionary(
3456
{interface: client.GetAll(interface)
3457
for interface in
3458
client._get_all_interface_names()})
3459
for client in tcp_server.clients.values()})
3460
3461
def client_added_signal(self, client):
3462
"""Send the new standard signal and the old signal"""
3463
if use_dbus:
3464
# New standard signal
3465
self.InterfacesAdded(
3466
client.dbus_object_path,
3467
dbus.Dictionary(
3468
{interface: client.GetAll(interface)
3469
for interface in
3470
client._get_all_interface_names()}))
3471
# Old signal
3472
self.ClientAdded(client.dbus_object_path)
3473
3474
def client_removed_signal(self, client):
3475
"""Send the new standard signal and the old signal"""
3476
if use_dbus:
3477
# New standard signal
3478
self.InterfacesRemoved(
3479
client.dbus_object_path,
3480
client._get_all_interface_names())
3481
# Old signal
3482
self.ClientRemoved(client.dbus_object_path,
3483
client.name)
3484
2579
3485
mandos_dbus_service = MandosDBusService()
2580
3486
3487
# Save modules to variables to exempt the modules from being
3488
# unloaded before the function registered with atexit() is run.
3489
mp = multiprocessing
3490
wn = wnull
3491
2581
3492
def cleanup():
2582
3493
"Cleanup function; run on exit"
2583
service.cleanup()
2584
2585
multiprocessing.active_children()
3494
if zeroconf:
3495
service.cleanup()
3496
3497
mp.active_children()
3498
wn.close()
2586
3499
if not (tcp_server.clients or client_settings):
2587
3500
return
2588
3501
2589
3502
# Store client before exiting. Secrets are encrypted with key
2590
3503
# based on what config file has. If config file is
2591
3504
# removed/edited, old secret will thus be unrecovable.
2592
3505
clients = {}
2593
3506
with PGPEngine() as pgp:
2594
for client in tcp_server.clients.itervalues():
3507
for client in tcp_server.clients.values():
2595
3508
key = client_settings[client.name]["secret"]
2596
3509
client.encrypted_secret = pgp.encrypt(client.secret,
2597
3510
key)
2598
3511
client_dict = {}
2599
3512
2600
3513
# A list of attributes that can not be pickled
2601
3514
# + secret.
2602
exclude = set(("bus", "changedstate", "secret",
2603
"checker"))
2604
for name, typ in (inspect.getmembers
2605
(dbus.service.Object)):
3515
exclude = {"bus", "changedstate", "secret",
3516
"checker", "server_settings"}
3517
for name, typ in inspect.getmembers(dbus.service
3518
.Object):
2606
3519
exclude.add(name)
2607
3520
2608
3521
client_dict["encrypted_secret"] = (client
2609
3522
.encrypted_secret)
2610
3523
for attr in client.client_structure:
2611
3524
if attr not in exclude:
2612
3525
client_dict[attr] = getattr(client, attr)
2613
3526
2614
3527
clients[client.name] = client_dict
2615
3528
del client_settings[client.name]["secret"]
2616
3529
2617
3530
try:
2618
with (tempfile.NamedTemporaryFile
2619
(mode='wb', suffix=".pickle", prefix='clients-',
2620
dir=os.path.dirname(stored_state_path),
2621
delete=False)) as stored_state:
2622
pickle.dump((clients, client_settings), stored_state)
2623
tempname=stored_state.name
3531
with tempfile.NamedTemporaryFile(
3532
mode='wb',
3533
suffix=".pickle",
3534
prefix='clients-',
3535
dir=os.path.dirname(stored_state_path),
3536
delete=False) as stored_state:
3537
pickle.dump((clients, client_settings), stored_state,
3538
protocol=2)
3539
tempname = stored_state.name
2624
3540
os.rename(tempname, stored_state_path)
2625
3541
except (IOError, OSError) as e:
2626
3542
if not debug:
2629
3545
except NameError:
2630
3546
pass
2631
3547
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
2632
logger.warning("Could not save persistent state: {0}"
3548
logger.warning("Could not save persistent state: {}"
2633
3549
.format(os.strerror(e.errno)))
2634
3550
else:
2635
3551
logger.warning("Could not save persistent state:",
2636
3552
exc_info=e)
2637
raise e
2638
3553
raise
3554
2639
3555
# Delete all clients, and settings from config
2640
3556
while tcp_server.clients:
2641
3557
name, client = tcp_server.clients.popitem()
2642
3558
if use_dbus:
2643
3559
client.remove_from_connection()
2644
# Don't signal anything except ClientRemoved
3560
# Don't signal the disabling
2645
3561
client.disable(quiet=True)
3562
# Emit D-Bus signal for removal
2646
3563
if use_dbus:
2647
# Emit D-Bus signal
2648
mandos_dbus_service.ClientRemoved(client
2649
.dbus_object_path,
2650
client.name)
3564
mandos_dbus_service.client_removed_signal(client)
2651
3565
client_settings.clear()
2652
3566
2653
3567
atexit.register(cleanup)
2654
2655
for client in tcp_server.clients.itervalues():
3568
3569
for client in tcp_server.clients.values():
2656
3570
if use_dbus:
2657
# Emit D-Bus signal
2658
mandos_dbus_service.ClientAdded(client.dbus_object_path)
3571
# Emit D-Bus signal for adding
3572
mandos_dbus_service.client_added_signal(client)
2659
3573
# Need to initiate checking of clients
2660
3574
if client.enabled:
2661
3575
client.init_checker()
2662
3576
2663
3577
tcp_server.enable()
2664
3578
tcp_server.server_activate()
2665
3579
2666
3580
# Find out what port we got
2667
service.port = tcp_server.socket.getsockname()[1]
3581
if zeroconf:
3582
service.port = tcp_server.socket.getsockname()[1]
2668
3583
if use_ipv6:
2669
3584
logger.info("Now listening on address %r, port %d,"
2670
3585
" flowinfo %d, scope_id %d",
2672
3587
else: # IPv4
2673
3588
logger.info("Now listening on address %r, port %d",
2674
3589
*tcp_server.socket.getsockname())
2675
2676
#service.interface = tcp_server.socket.getsockname()[3]
2677
3590
3591
# service.interface = tcp_server.socket.getsockname()[3]
3592
2678
3593
try:
2679
# From the Avahi example code
2680
try:
2681
service.activate()
2682
except dbus.exceptions.DBusException as error:
2683
logger.critical("D-Bus Exception", exc_info=error)
2684
cleanup()
2685
sys.exit(1)
2686
# End of Avahi example code
2687
2688
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2689
lambda *args, **kwargs:
2690
(tcp_server.handle_request
2691
(*args[2:], **kwargs) or True))
2692
3594
if zeroconf:
3595
# From the Avahi example code
3596
try:
3597
service.activate()
3598
except dbus.exceptions.DBusException as error:
3599
logger.critical("D-Bus Exception", exc_info=error)
3600
cleanup()
3601
sys.exit(1)
3602
# End of Avahi example code
3603
3604
GLib.io_add_watch(tcp_server.fileno(), GLib.IO_IN,
3605
lambda *args, **kwargs:
3606
(tcp_server.handle_request
3607
(*args[2:], **kwargs) or True))
3608
2693
3609
logger.debug("Starting main loop")
2694
3610
main_loop.run()
2695
3611
except AvahiError as error:
2704
3620
# Must run before the D-Bus bus name gets deregistered
2705
3621
cleanup()
2706
3622
3623
2707
3624
if __name__ == '__main__':
2708
3625
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0