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- Committer: Teddy Hogeborn
- Date: 2011-11-24 20:15:24 UTC
- mto: (505.2.8 mandos-client-network-hooks)
- mto: This revision was merged to the branch mainline in revision 525.
- Revision ID: teddy@recompile.se-20111124201524-5w9ovzpuw3drdlgf
* network-hooks.d: New directory.
* network-hooks.d/bridge: New example hook.
* network-hooks.d/bridge.conf: Config file for bridge example hook.
* network-hooks.d/bridge: New example hook.
* network-hooks.d/bridge.conf: Config file for bridge example hook.
- files added:
- initramfs-tools-hook-conf
- files removed:
- bugs.xml
- debian/tests
- debian/upstream
- dracut-module
- plugin-helpers
- files modified:
- .bzrignore
added
removed
mandos
1
1
#!/usr/bin/python
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2
# -*- mode: python; coding: utf-8 -*-
3
#
3
#
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# 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 © 2008-2019 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
14
# Copyright © 2008-2011 Teddy Hogeborn
15
# Copyright © 2008-2011 Björn Påhlsson
16
#
17
# This program is free software: you can redistribute it and/or modify
18
# it under the terms of the GNU General Public License as published by
21
19
# the Free Software Foundation, either version 3 of the License, or
22
20
# (at your option) any later version.
23
21
#
24
# Mandos is distributed in the hope that it will be useful, but
25
# WITHOUT ANY WARRANTY; without even the implied warranty of
22
# This program is distributed in the hope that it will be useful,
23
# but WITHOUT ANY WARRANTY; without even the implied warranty of
26
24
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
27
25
# GNU General Public License for more details.
28
#
26
#
29
27
# You should have received a copy of the GNU General Public License
30
# along with Mandos. If not, see <http://www.gnu.org/licenses/>.
31
#
28
# along with this program. If not, see
29
# <http://www.gnu.org/licenses/>.
30
#
32
31
# Contact the authors at <mandos@recompile.se>.
33
#
32
#
34
33
35
34
from __future__ import (division, absolute_import, print_function,
36
35
unicode_literals)
37
36
38
try:
39
from future_builtins import *
40
except ImportError:
41
pass
42
43
try:
44
import SocketServer as socketserver
45
except ImportError:
46
import socketserver
37
import SocketServer as socketserver
47
38
import socket
48
39
import argparse
49
40
import datetime
50
41
import errno
51
try:
52
import ConfigParser as configparser
53
except ImportError:
54
import configparser
42
import gnutls.crypto
43
import gnutls.connection
44
import gnutls.errors
45
import gnutls.library.functions
46
import gnutls.library.constants
47
import gnutls.library.types
48
import ConfigParser as configparser
55
49
import sys
56
50
import re
57
51
import os
66
60
import struct
67
61
import fcntl
68
62
import functools
69
try:
70
import cPickle as pickle
71
except ImportError:
72
import pickle
63
import cPickle as pickle
73
64
import multiprocessing
74
65
import types
75
import binascii
76
import tempfile
77
import itertools
78
import collections
79
import codecs
80
66
81
67
import dbus
82
68
import dbus.service
83
import gi
84
from gi.repository import GLib
69
import gobject
70
import avahi
85
71
from dbus.mainloop.glib import DBusGMainLoop
86
72
import ctypes
87
73
import ctypes.util
88
74
import xml.dom.minidom
89
75
import inspect
90
76
91
if sys.version_info.major == 2:
92
__metaclass__ = type
93
94
# Try to find the value of SO_BINDTODEVICE:
95
77
try:
96
# This is where SO_BINDTODEVICE is in Python 3.3 (or 3.4?) and
97
# newer, and it is also the most natural place for it:
98
78
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
99
79
except AttributeError:
100
80
try:
101
# This is where SO_BINDTODEVICE was up to and including Python
102
# 2.6, and also 3.2:
103
81
from IN import SO_BINDTODEVICE
104
82
except ImportError:
105
# In Python 2.7 it seems to have been removed entirely.
106
# Try running the C preprocessor:
107
try:
108
cc = subprocess.Popen(["cc", "--language=c", "-E",
109
"/dev/stdin"],
110
stdin=subprocess.PIPE,
111
stdout=subprocess.PIPE)
112
stdout = cc.communicate(
113
"#include <sys/socket.h>\nSO_BINDTODEVICE\n")[0]
114
SO_BINDTODEVICE = int(stdout.splitlines()[-1])
115
except (OSError, ValueError, IndexError):
116
# No value found
117
SO_BINDTODEVICE = None
118
119
if sys.version_info.major == 2:
120
str = unicode
121
122
if sys.version_info < (3, 2):
123
configparser.Configparser = configparser.SafeConfigParser
124
125
version = "1.8.7"
126
stored_state_file = "clients.pickle"
127
128
logger = logging.getLogger()
129
syslogger = None
130
131
try:
132
if_nametoindex = ctypes.cdll.LoadLibrary(
133
ctypes.util.find_library("c")).if_nametoindex
134
except (OSError, AttributeError):
135
136
def if_nametoindex(interface):
137
"Get an interface index the hard way, i.e. using fcntl()"
138
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
139
with contextlib.closing(socket.socket()) as s:
140
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
141
struct.pack(b"16s16x", interface))
142
interface_index = struct.unpack("I", ifreq[16:20])[0]
143
return interface_index
144
145
146
def copy_function(func):
147
"""Make a copy of a function"""
148
if sys.version_info.major == 2:
149
return types.FunctionType(func.func_code,
150
func.func_globals,
151
func.func_name,
152
func.func_defaults,
153
func.func_closure)
154
else:
155
return types.FunctionType(func.__code__,
156
func.__globals__,
157
func.__name__,
158
func.__defaults__,
159
func.__closure__)
160
161
162
def initlogger(debug, level=logging.WARNING):
163
"""init logger and add loglevel"""
164
165
global syslogger
166
syslogger = (logging.handlers.SysLogHandler(
167
facility=logging.handlers.SysLogHandler.LOG_DAEMON,
168
address="/dev/log"))
169
syslogger.setFormatter(logging.Formatter
170
('Mandos [%(process)d]: %(levelname)s:'
171
' %(message)s'))
172
logger.addHandler(syslogger)
173
174
if debug:
175
console = logging.StreamHandler()
176
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
177
' [%(process)d]:'
178
' %(levelname)s:'
179
' %(message)s'))
180
logger.addHandler(console)
181
logger.setLevel(level)
182
183
184
class PGPError(Exception):
185
"""Exception if encryption/decryption fails"""
186
pass
187
188
189
class PGPEngine:
190
"""A simple class for OpenPGP symmetric encryption & decryption"""
191
192
def __init__(self):
193
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
194
self.gpg = "gpg"
195
try:
196
output = subprocess.check_output(["gpgconf"])
197
for line in output.splitlines():
198
name, text, path = line.split(b":")
199
if name == "gpg":
200
self.gpg = path
201
break
202
except OSError as e:
203
if e.errno != errno.ENOENT:
204
raise
205
self.gnupgargs = ['--batch',
206
'--homedir', self.tempdir,
207
'--force-mdc',
208
'--quiet']
209
# Only GPG version 1 has the --no-use-agent option.
210
if self.gpg == "gpg" or self.gpg.endswith("/gpg"):
211
self.gnupgargs.append("--no-use-agent")
212
213
def __enter__(self):
214
return self
215
216
def __exit__(self, exc_type, exc_value, traceback):
217
self._cleanup()
218
return False
219
220
def __del__(self):
221
self._cleanup()
222
223
def _cleanup(self):
224
if self.tempdir is not None:
225
# Delete contents of tempdir
226
for root, dirs, files in os.walk(self.tempdir,
227
topdown=False):
228
for filename in files:
229
os.remove(os.path.join(root, filename))
230
for dirname in dirs:
231
os.rmdir(os.path.join(root, dirname))
232
# Remove tempdir
233
os.rmdir(self.tempdir)
234
self.tempdir = None
235
236
def password_encode(self, password):
237
# Passphrase can not be empty and can not contain newlines or
238
# NUL bytes. So we prefix it and hex encode it.
239
encoded = b"mandos" + binascii.hexlify(password)
240
if len(encoded) > 2048:
241
# GnuPG can't handle long passwords, so encode differently
242
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
243
.replace(b"\n", b"\\n")
244
.replace(b"\0", b"\\x00"))
245
return encoded
246
247
def encrypt(self, data, password):
248
passphrase = self.password_encode(password)
249
with tempfile.NamedTemporaryFile(
250
dir=self.tempdir) as passfile:
251
passfile.write(passphrase)
252
passfile.flush()
253
proc = subprocess.Popen([self.gpg, '--symmetric',
254
'--passphrase-file',
255
passfile.name]
256
+ self.gnupgargs,
257
stdin=subprocess.PIPE,
258
stdout=subprocess.PIPE,
259
stderr=subprocess.PIPE)
260
ciphertext, err = proc.communicate(input=data)
261
if proc.returncode != 0:
262
raise PGPError(err)
263
return ciphertext
264
265
def decrypt(self, data, password):
266
passphrase = self.password_encode(password)
267
with tempfile.NamedTemporaryFile(
268
dir=self.tempdir) as passfile:
269
passfile.write(passphrase)
270
passfile.flush()
271
proc = subprocess.Popen([self.gpg, '--decrypt',
272
'--passphrase-file',
273
passfile.name]
274
+ self.gnupgargs,
275
stdin=subprocess.PIPE,
276
stdout=subprocess.PIPE,
277
stderr=subprocess.PIPE)
278
decrypted_plaintext, err = proc.communicate(input=data)
279
if proc.returncode != 0:
280
raise PGPError(err)
281
return decrypted_plaintext
282
283
284
# Pretend that we have an Avahi module
285
class avahi:
286
"""This isn't so much a class as it is a module-like namespace."""
287
IF_UNSPEC = -1 # avahi-common/address.h
288
PROTO_UNSPEC = -1 # avahi-common/address.h
289
PROTO_INET = 0 # avahi-common/address.h
290
PROTO_INET6 = 1 # avahi-common/address.h
291
DBUS_NAME = "org.freedesktop.Avahi"
292
DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"
293
DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"
294
DBUS_PATH_SERVER = "/"
295
296
@staticmethod
297
def string_array_to_txt_array(t):
298
return dbus.Array((dbus.ByteArray(s.encode("utf-8"))
299
for s in t), signature="ay")
300
ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h
301
ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h
302
ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h
303
SERVER_INVALID = 0 # avahi-common/defs.h
304
SERVER_REGISTERING = 1 # avahi-common/defs.h
305
SERVER_RUNNING = 2 # avahi-common/defs.h
306
SERVER_COLLISION = 3 # avahi-common/defs.h
307
SERVER_FAILURE = 4 # avahi-common/defs.h
308
83
SO_BINDTODEVICE = None
84
85
86
version = "1.4.1"
87
88
#logger = logging.getLogger('mandos')
89
logger = logging.Logger('mandos')
90
syslogger = (logging.handlers.SysLogHandler
91
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
92
address = str("/dev/log")))
93
syslogger.setFormatter(logging.Formatter
94
('Mandos [%(process)d]: %(levelname)s:'
95
' %(message)s'))
96
logger.addHandler(syslogger)
97
98
console = logging.StreamHandler()
99
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
100
' %(levelname)s:'
101
' %(message)s'))
102
logger.addHandler(console)
309
103
310
104
class AvahiError(Exception):
311
105
def __init__(self, value, *args, **kwargs):
312
106
self.value = value
313
return super(AvahiError, self).__init__(value, *args,
314
**kwargs)
315
107
super(AvahiError, self).__init__(value, *args, **kwargs)
108
def __unicode__(self):
109
return unicode(repr(self.value))
316
110
317
111
class AvahiServiceError(AvahiError):
318
112
pass
319
113
320
321
114
class AvahiGroupError(AvahiError):
322
115
pass
323
116
324
117
325
class AvahiService:
118
class AvahiService(object):
326
119
"""An Avahi (Zeroconf) service.
327
120
328
121
Attributes:
329
122
interface: integer; avahi.IF_UNSPEC or an interface index.
330
123
Used to optionally bind to the specified interface.
331
124
name: string; Example: 'Mandos'
332
125
type: string; Example: '_mandos._tcp'.
333
See <https://www.iana.org/assignments/service-names-port-numbers>
126
See <http://www.dns-sd.org/ServiceTypes.html>
334
127
port: integer; what port to announce
335
128
TXT: list of strings; TXT record for the service
336
129
domain: string; Domain to publish on, default to .local if empty.
342
135
server: D-Bus Server
343
136
bus: dbus.SystemBus()
344
137
"""
345
346
def __init__(self,
347
interface=avahi.IF_UNSPEC,
348
name=None,
349
servicetype=None,
350
port=None,
351
TXT=None,
352
domain="",
353
host="",
354
max_renames=32768,
355
protocol=avahi.PROTO_UNSPEC,
356
bus=None):
138
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
139
servicetype = None, port = None, TXT = None,
140
domain = "", host = "", max_renames = 32768,
141
protocol = avahi.PROTO_UNSPEC, bus = None):
357
142
self.interface = interface
358
143
self.name = name
359
144
self.type = servicetype
368
153
self.server = None
369
154
self.bus = bus
370
155
self.entry_group_state_changed_match = None
371
372
def rename(self, remove=True):
156
def rename(self):
373
157
"""Derived from the Avahi example code"""
374
158
if self.rename_count >= self.max_renames:
375
159
logger.critical("No suitable Zeroconf service name found"
376
160
" after %i retries, exiting.",
377
161
self.rename_count)
378
162
raise AvahiServiceError("Too many renames")
379
self.name = str(
380
self.server.GetAlternativeServiceName(self.name))
381
self.rename_count += 1
163
self.name = unicode(self.server
164
.GetAlternativeServiceName(self.name))
382
165
logger.info("Changing Zeroconf service name to %r ...",
383
166
self.name)
384
if remove:
385
self.remove()
167
syslogger.setFormatter(logging.Formatter
168
('Mandos (%s) [%%(process)d]:'
169
' %%(levelname)s: %%(message)s'
170
% self.name))
171
self.remove()
386
172
try:
387
173
self.add()
388
174
except dbus.exceptions.DBusException as error:
389
if (error.get_dbus_name()
390
== "org.freedesktop.Avahi.CollisionError"):
391
logger.info("Local Zeroconf service name collision.")
392
return self.rename(remove=False)
393
else:
394
logger.critical("D-Bus Exception", exc_info=error)
395
self.cleanup()
396
os._exit(1)
397
175
logger.critical("DBusException: %s", error)
176
self.cleanup()
177
os._exit(1)
178
self.rename_count += 1
398
179
def remove(self):
399
180
"""Derived from the Avahi example code"""
400
181
if self.entry_group_state_changed_match is not None:
402
183
self.entry_group_state_changed_match = None
403
184
if self.group is not None:
404
185
self.group.Reset()
405
406
186
def add(self):
407
187
"""Derived from the Avahi example code"""
408
188
self.remove()
413
193
avahi.DBUS_INTERFACE_ENTRY_GROUP)
414
194
self.entry_group_state_changed_match = (
415
195
self.group.connect_to_signal(
416
'StateChanged', self.entry_group_state_changed))
196
'StateChanged', self .entry_group_state_changed))
417
197
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
418
198
self.name, self.type)
419
199
self.group.AddService(
425
205
dbus.UInt16(self.port),
426
206
avahi.string_array_to_txt_array(self.TXT))
427
207
self.group.Commit()
428
429
208
def entry_group_state_changed(self, state, error):
430
209
"""Derived from the Avahi example code"""
431
210
logger.debug("Avahi entry group state change: %i", state)
432
211
433
212
if state == avahi.ENTRY_GROUP_ESTABLISHED:
434
213
logger.debug("Zeroconf service established.")
435
214
elif state == avahi.ENTRY_GROUP_COLLISION:
437
216
self.rename()
438
217
elif state == avahi.ENTRY_GROUP_FAILURE:
439
218
logger.critical("Avahi: Error in group state changed %s",
440
str(error))
441
raise AvahiGroupError("State changed: {!s}".format(error))
442
219
unicode(error))
220
raise AvahiGroupError("State changed: %s"
221
% unicode(error))
443
222
def cleanup(self):
444
223
"""Derived from the Avahi example code"""
445
224
if self.group is not None:
446
225
try:
447
226
self.group.Free()
448
227
except (dbus.exceptions.UnknownMethodException,
449
dbus.exceptions.DBusException):
228
dbus.exceptions.DBusException) as e:
450
229
pass
451
230
self.group = None
452
231
self.remove()
453
454
232
def server_state_changed(self, state, error=None):
455
233
"""Derived from the Avahi example code"""
456
234
logger.debug("Avahi server state change: %i", state)
457
bad_states = {
458
avahi.SERVER_INVALID: "Zeroconf server invalid",
459
avahi.SERVER_REGISTERING: None,
460
avahi.SERVER_COLLISION: "Zeroconf server name collision",
461
avahi.SERVER_FAILURE: "Zeroconf server failure",
462
}
235
bad_states = { avahi.SERVER_INVALID:
236
"Zeroconf server invalid",
237
avahi.SERVER_REGISTERING: None,
238
avahi.SERVER_COLLISION:
239
"Zeroconf server name collision",
240
avahi.SERVER_FAILURE:
241
"Zeroconf server failure" }
463
242
if state in bad_states:
464
243
if bad_states[state] is not None:
465
244
if error is None:
468
247
logger.error(bad_states[state] + ": %r", error)
469
248
self.cleanup()
470
249
elif state == avahi.SERVER_RUNNING:
471
try:
472
self.add()
473
except dbus.exceptions.DBusException as error:
474
if (error.get_dbus_name()
475
== "org.freedesktop.Avahi.CollisionError"):
476
logger.info("Local Zeroconf service name"
477
" collision.")
478
return self.rename(remove=False)
479
else:
480
logger.critical("D-Bus Exception", exc_info=error)
481
self.cleanup()
482
os._exit(1)
250
self.add()
483
251
else:
484
252
if error is None:
485
253
logger.debug("Unknown state: %r", state)
486
254
else:
487
255
logger.debug("Unknown state: %r: %r", state, error)
488
489
256
def activate(self):
490
257
"""Derived from the Avahi example code"""
491
258
if self.server is None:
495
262
follow_name_owner_changes=True),
496
263
avahi.DBUS_INTERFACE_SERVER)
497
264
self.server.connect_to_signal("StateChanged",
498
self.server_state_changed)
265
self.server_state_changed)
499
266
self.server_state_changed(self.server.GetState())
500
267
501
268
502
class AvahiServiceToSyslog(AvahiService):
503
def rename(self, *args, **kwargs):
504
"""Add the new name to the syslog messages"""
505
ret = super(AvahiServiceToSyslog, self).rename(*args, **kwargs)
506
syslogger.setFormatter(logging.Formatter(
507
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
508
.format(self.name)))
509
return ret
510
511
512
# Pretend that we have a GnuTLS module
513
class gnutls:
514
"""This isn't so much a class as it is a module-like namespace."""
515
516
library = ctypes.util.find_library("gnutls")
517
if library is None:
518
library = ctypes.util.find_library("gnutls-deb0")
519
_library = ctypes.cdll.LoadLibrary(library)
520
del library
521
522
# Unless otherwise indicated, the constants and types below are
523
# all from the gnutls/gnutls.h C header file.
524
525
# Constants
526
E_SUCCESS = 0
527
E_INTERRUPTED = -52
528
E_AGAIN = -28
529
CRT_OPENPGP = 2
530
CRT_RAWPK = 3
531
CLIENT = 2
532
SHUT_RDWR = 0
533
CRD_CERTIFICATE = 1
534
E_NO_CERTIFICATE_FOUND = -49
535
X509_FMT_DER = 0
536
NO_TICKETS = 1<<10
537
ENABLE_RAWPK = 1<<18
538
CTYPE_PEERS = 3
539
KEYID_USE_SHA256 = 1 # gnutls/x509.h
540
OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
541
542
# Types
543
class session_int(ctypes.Structure):
544
_fields_ = []
545
session_t = ctypes.POINTER(session_int)
546
547
class certificate_credentials_st(ctypes.Structure):
548
_fields_ = []
549
certificate_credentials_t = ctypes.POINTER(
550
certificate_credentials_st)
551
certificate_type_t = ctypes.c_int
552
553
class datum_t(ctypes.Structure):
554
_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
555
('size', ctypes.c_uint)]
556
557
class openpgp_crt_int(ctypes.Structure):
558
_fields_ = []
559
openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
560
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
561
log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
562
credentials_type_t = ctypes.c_int
563
transport_ptr_t = ctypes.c_void_p
564
close_request_t = ctypes.c_int
565
566
# Exceptions
567
class Error(Exception):
568
def __init__(self, message=None, code=None, args=()):
569
# Default usage is by a message string, but if a return
570
# code is passed, convert it to a string with
571
# gnutls.strerror()
572
self.code = code
573
if message is None and code is not None:
574
message = gnutls.strerror(code)
575
return super(gnutls.Error, self).__init__(
576
message, *args)
577
578
class CertificateSecurityError(Error):
579
pass
580
581
# Classes
582
class Credentials:
583
def __init__(self):
584
self._c_object = gnutls.certificate_credentials_t()
585
gnutls.certificate_allocate_credentials(
586
ctypes.byref(self._c_object))
587
self.type = gnutls.CRD_CERTIFICATE
588
589
def __del__(self):
590
gnutls.certificate_free_credentials(self._c_object)
591
592
class ClientSession:
593
def __init__(self, socket, credentials=None):
594
self._c_object = gnutls.session_t()
595
gnutls_flags = gnutls.CLIENT
596
if gnutls.check_version(b"3.5.6"):
597
gnutls_flags |= gnutls.NO_TICKETS
598
if gnutls.has_rawpk:
599
gnutls_flags |= gnutls.ENABLE_RAWPK
600
gnutls.init(ctypes.byref(self._c_object), gnutls_flags)
601
del gnutls_flags
602
gnutls.set_default_priority(self._c_object)
603
gnutls.transport_set_ptr(self._c_object, socket.fileno())
604
gnutls.handshake_set_private_extensions(self._c_object,
605
True)
606
self.socket = socket
607
if credentials is None:
608
credentials = gnutls.Credentials()
609
gnutls.credentials_set(self._c_object, credentials.type,
610
ctypes.cast(credentials._c_object,
611
ctypes.c_void_p))
612
self.credentials = credentials
613
614
def __del__(self):
615
gnutls.deinit(self._c_object)
616
617
def handshake(self):
618
return gnutls.handshake(self._c_object)
619
620
def send(self, data):
621
data = bytes(data)
622
data_len = len(data)
623
while data_len > 0:
624
data_len -= gnutls.record_send(self._c_object,
625
data[-data_len:],
626
data_len)
627
628
def bye(self):
629
return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
630
631
# Error handling functions
632
def _error_code(result):
633
"""A function to raise exceptions on errors, suitable
634
for the 'restype' attribute on ctypes functions"""
635
if result >= 0:
636
return result
637
if result == gnutls.E_NO_CERTIFICATE_FOUND:
638
raise gnutls.CertificateSecurityError(code=result)
639
raise gnutls.Error(code=result)
640
641
def _retry_on_error(result, func, arguments):
642
"""A function to retry on some errors, suitable
643
for the 'errcheck' attribute on ctypes functions"""
644
while result < 0:
645
if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
646
return _error_code(result)
647
result = func(*arguments)
648
return result
649
650
# Unless otherwise indicated, the function declarations below are
651
# all from the gnutls/gnutls.h C header file.
652
653
# Functions
654
priority_set_direct = _library.gnutls_priority_set_direct
655
priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
656
ctypes.POINTER(ctypes.c_char_p)]
657
priority_set_direct.restype = _error_code
658
659
init = _library.gnutls_init
660
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
661
init.restype = _error_code
662
663
set_default_priority = _library.gnutls_set_default_priority
664
set_default_priority.argtypes = [session_t]
665
set_default_priority.restype = _error_code
666
667
record_send = _library.gnutls_record_send
668
record_send.argtypes = [session_t, ctypes.c_void_p,
669
ctypes.c_size_t]
670
record_send.restype = ctypes.c_ssize_t
671
record_send.errcheck = _retry_on_error
672
673
certificate_allocate_credentials = (
674
_library.gnutls_certificate_allocate_credentials)
675
certificate_allocate_credentials.argtypes = [
676
ctypes.POINTER(certificate_credentials_t)]
677
certificate_allocate_credentials.restype = _error_code
678
679
certificate_free_credentials = (
680
_library.gnutls_certificate_free_credentials)
681
certificate_free_credentials.argtypes = [
682
certificate_credentials_t]
683
certificate_free_credentials.restype = None
684
685
handshake_set_private_extensions = (
686
_library.gnutls_handshake_set_private_extensions)
687
handshake_set_private_extensions.argtypes = [session_t,
688
ctypes.c_int]
689
handshake_set_private_extensions.restype = None
690
691
credentials_set = _library.gnutls_credentials_set
692
credentials_set.argtypes = [session_t, credentials_type_t,
693
ctypes.c_void_p]
694
credentials_set.restype = _error_code
695
696
strerror = _library.gnutls_strerror
697
strerror.argtypes = [ctypes.c_int]
698
strerror.restype = ctypes.c_char_p
699
700
certificate_type_get = _library.gnutls_certificate_type_get
701
certificate_type_get.argtypes = [session_t]
702
certificate_type_get.restype = _error_code
703
704
certificate_get_peers = _library.gnutls_certificate_get_peers
705
certificate_get_peers.argtypes = [session_t,
706
ctypes.POINTER(ctypes.c_uint)]
707
certificate_get_peers.restype = ctypes.POINTER(datum_t)
708
709
global_set_log_level = _library.gnutls_global_set_log_level
710
global_set_log_level.argtypes = [ctypes.c_int]
711
global_set_log_level.restype = None
712
713
global_set_log_function = _library.gnutls_global_set_log_function
714
global_set_log_function.argtypes = [log_func]
715
global_set_log_function.restype = None
716
717
deinit = _library.gnutls_deinit
718
deinit.argtypes = [session_t]
719
deinit.restype = None
720
721
handshake = _library.gnutls_handshake
722
handshake.argtypes = [session_t]
723
handshake.restype = _error_code
724
handshake.errcheck = _retry_on_error
725
726
transport_set_ptr = _library.gnutls_transport_set_ptr
727
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
728
transport_set_ptr.restype = None
729
730
bye = _library.gnutls_bye
731
bye.argtypes = [session_t, close_request_t]
732
bye.restype = _error_code
733
bye.errcheck = _retry_on_error
734
735
check_version = _library.gnutls_check_version
736
check_version.argtypes = [ctypes.c_char_p]
737
check_version.restype = ctypes.c_char_p
738
739
_need_version = b"3.3.0"
740
if check_version(_need_version) is None:
741
raise self.Error("Needs GnuTLS {} or later"
742
.format(_need_version))
743
744
_tls_rawpk_version = b"3.6.6"
745
has_rawpk = bool(check_version(_tls_rawpk_version))
746
747
if has_rawpk:
748
# Types
749
class pubkey_st(ctypes.Structure):
750
_fields = []
751
pubkey_t = ctypes.POINTER(pubkey_st)
752
753
x509_crt_fmt_t = ctypes.c_int
754
755
# All the function declarations below are from gnutls/abstract.h
756
pubkey_init = _library.gnutls_pubkey_init
757
pubkey_init.argtypes = [ctypes.POINTER(pubkey_t)]
758
pubkey_init.restype = _error_code
759
760
pubkey_import = _library.gnutls_pubkey_import
761
pubkey_import.argtypes = [pubkey_t, ctypes.POINTER(datum_t),
762
x509_crt_fmt_t]
763
pubkey_import.restype = _error_code
764
765
pubkey_get_key_id = _library.gnutls_pubkey_get_key_id
766
pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,
767
ctypes.POINTER(ctypes.c_ubyte),
768
ctypes.POINTER(ctypes.c_size_t)]
769
pubkey_get_key_id.restype = _error_code
770
771
pubkey_deinit = _library.gnutls_pubkey_deinit
772
pubkey_deinit.argtypes = [pubkey_t]
773
pubkey_deinit.restype = None
774
else:
775
# All the function declarations below are from gnutls/openpgp.h
776
777
openpgp_crt_init = _library.gnutls_openpgp_crt_init
778
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
779
openpgp_crt_init.restype = _error_code
780
781
openpgp_crt_import = _library.gnutls_openpgp_crt_import
782
openpgp_crt_import.argtypes = [openpgp_crt_t,
783
ctypes.POINTER(datum_t),
784
openpgp_crt_fmt_t]
785
openpgp_crt_import.restype = _error_code
786
787
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
788
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
789
ctypes.POINTER(ctypes.c_uint)]
790
openpgp_crt_verify_self.restype = _error_code
791
792
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
793
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
794
openpgp_crt_deinit.restype = None
795
796
openpgp_crt_get_fingerprint = (
797
_library.gnutls_openpgp_crt_get_fingerprint)
798
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
799
ctypes.c_void_p,
800
ctypes.POINTER(
801
ctypes.c_size_t)]
802
openpgp_crt_get_fingerprint.restype = _error_code
803
804
if check_version(b"3.6.4"):
805
certificate_type_get2 = _library.gnutls_certificate_type_get2
806
certificate_type_get2.argtypes = [session_t, ctypes.c_int]
807
certificate_type_get2.restype = _error_code
808
809
# Remove non-public functions
810
del _error_code, _retry_on_error
811
812
813
def call_pipe(connection, # : multiprocessing.Connection
814
func, *args, **kwargs):
815
"""This function is meant to be called by multiprocessing.Process
816
817
This function runs func(*args, **kwargs), and writes the resulting
818
return value on the provided multiprocessing.Connection.
819
"""
820
connection.send(func(*args, **kwargs))
821
connection.close()
822
823
824
class Client:
269
def _timedelta_to_milliseconds(td):
270
"Convert a datetime.timedelta() to milliseconds"
271
return ((td.days * 24 * 60 * 60 * 1000)
272
+ (td.seconds * 1000)
273
+ (td.microseconds // 1000))
274
275
class Client(object):
825
276
"""A representation of a client host served by this server.
826
277
827
278
Attributes:
828
approved: bool(); 'None' if not yet approved/disapproved
279
_approved: bool(); 'None' if not yet approved/disapproved
829
280
approval_delay: datetime.timedelta(); Time to wait for approval
830
281
approval_duration: datetime.timedelta(); Duration of one approval
831
checker: multiprocessing.Process(); a running checker process used
832
to see if the client lives. 'None' if no process is
833
running.
834
checker_callback_tag: a GLib event source tag, or None
282
checker: subprocess.Popen(); a running checker process used
283
to see if the client lives.
284
'None' if no process is running.
285
checker_callback_tag: a gobject event source tag, or None
835
286
checker_command: string; External command which is run to check
836
287
if client lives. %() expansions are done at
837
288
runtime with vars(self) as dict, so that for
838
289
instance %(name)s can be used in the command.
839
checker_initiator_tag: a GLib event source tag, or None
290
checker_initiator_tag: a gobject event source tag, or None
840
291
created: datetime.datetime(); (UTC) object creation
841
client_structure: Object describing what attributes a client has
842
and is used for storing the client at exit
843
292
current_checker_command: string; current running checker_command
844
disable_initiator_tag: a GLib event source tag, or None
293
disable_hook: If set, called by disable() as disable_hook(self)
294
disable_initiator_tag: a gobject event source tag, or None
845
295
enabled: bool()
846
296
fingerprint: string (40 or 32 hexadecimal digits); used to
847
uniquely identify an OpenPGP client
848
key_id: string (64 hexadecimal digits); used to uniquely identify
849
a client using raw public keys
297
uniquely identify the client
850
298
host: string; available for use by the checker command
851
299
interval: datetime.timedelta(); How often to start a new checker
852
300
last_approval_request: datetime.datetime(); (UTC) or None
853
301
last_checked_ok: datetime.datetime(); (UTC) or None
854
last_checker_status: integer between 0 and 255 reflecting exit
855
status of last checker. -1 reflects crashed
856
checker, -2 means no checker completed yet.
857
last_checker_signal: The signal which killed the last checker, if
858
last_checker_status is -1
859
last_enabled: datetime.datetime(); (UTC) or None
302
last_enabled: datetime.datetime(); (UTC)
860
303
name: string; from the config file, used in log messages and
861
304
D-Bus identifiers
862
305
secret: bytestring; sent verbatim (over TLS) to client
863
306
timeout: datetime.timedelta(); How long from last_checked_ok
864
307
until this client is disabled
865
extended_timeout: extra long timeout when secret has been sent
308
extended_timeout: extra long timeout when password has been sent
866
309
runtime_expansions: Allowed attributes for runtime expansion.
867
310
expires: datetime.datetime(); time (UTC) when a client will be
868
311
disabled, or None
869
server_settings: The server_settings dict from main()
870
312
"""
871
313
872
314
runtime_expansions = ("approval_delay", "approval_duration",
873
"created", "enabled", "expires", "key_id",
874
"fingerprint", "host", "interval",
875
"last_approval_request", "last_checked_ok",
315
"created", "enabled", "fingerprint",
316
"host", "interval", "last_checked_ok",
876
317
"last_enabled", "name", "timeout")
877
client_defaults = {
878
"timeout": "PT5M",
879
"extended_timeout": "PT15M",
880
"interval": "PT2M",
881
"checker": "fping -q -- %%(host)s",
882
"host": "",
883
"approval_delay": "PT0S",
884
"approval_duration": "PT1S",
885
"approved_by_default": "True",
886
"enabled": "True",
887
}
888
889
@staticmethod
890
def config_parser(config):
891
"""Construct a new dict of client settings of this form:
892
{ client_name: {setting_name: value, ...}, ...}
893
with exceptions for any special settings as defined above.
894
NOTE: Must be a pure function. Must return the same result
895
value given the same arguments.
896
"""
897
settings = {}
898
for client_name in config.sections():
899
section = dict(config.items(client_name))
900
client = settings[client_name] = {}
901
902
client["host"] = section["host"]
903
# Reformat values from string types to Python types
904
client["approved_by_default"] = config.getboolean(
905
client_name, "approved_by_default")
906
client["enabled"] = config.getboolean(client_name,
907
"enabled")
908
909
# Uppercase and remove spaces from key_id and fingerprint
910
# for later comparison purposes with return value from the
911
# key_id() and fingerprint() functions
912
client["key_id"] = (section.get("key_id", "").upper()
913
.replace(" ", ""))
914
client["fingerprint"] = (section["fingerprint"].upper()
915
.replace(" ", ""))
916
if "secret" in section:
917
client["secret"] = codecs.decode(section["secret"]
918
.encode("utf-8"),
919
"base64")
920
elif "secfile" in section:
921
with open(os.path.expanduser(os.path.expandvars
922
(section["secfile"])),
923
"rb") as secfile:
924
client["secret"] = secfile.read()
925
else:
926
raise TypeError("No secret or secfile for section {}"
927
.format(section))
928
client["timeout"] = string_to_delta(section["timeout"])
929
client["extended_timeout"] = string_to_delta(
930
section["extended_timeout"])
931
client["interval"] = string_to_delta(section["interval"])
932
client["approval_delay"] = string_to_delta(
933
section["approval_delay"])
934
client["approval_duration"] = string_to_delta(
935
section["approval_duration"])
936
client["checker_command"] = section["checker"]
937
client["last_approval_request"] = None
938
client["last_checked_ok"] = None
939
client["last_checker_status"] = -2
940
941
return settings
942
943
def __init__(self, settings, name=None, server_settings=None):
318
319
def timeout_milliseconds(self):
320
"Return the 'timeout' attribute in milliseconds"
321
return _timedelta_to_milliseconds(self.timeout)
322
323
def extended_timeout_milliseconds(self):
324
"Return the 'extended_timeout' attribute in milliseconds"
325
return _timedelta_to_milliseconds(self.extended_timeout)
326
327
def interval_milliseconds(self):
328
"Return the 'interval' attribute in milliseconds"
329
return _timedelta_to_milliseconds(self.interval)
330
331
def approval_delay_milliseconds(self):
332
return _timedelta_to_milliseconds(self.approval_delay)
333
334
def __init__(self, name = None, disable_hook=None, config=None):
335
"""Note: the 'checker' key in 'config' sets the
336
'checker_command' attribute and *not* the 'checker'
337
attribute."""
944
338
self.name = name
945
if server_settings is None:
946
server_settings = {}
947
self.server_settings = server_settings
948
# adding all client settings
949
for setting, value in settings.items():
950
setattr(self, setting, value)
951
952
if self.enabled:
953
if not hasattr(self, "last_enabled"):
954
self.last_enabled = datetime.datetime.utcnow()
955
if not hasattr(self, "expires"):
956
self.expires = (datetime.datetime.utcnow()
957
+ self.timeout)
958
else:
959
self.last_enabled = None
960
self.expires = None
961
339
if config is None:
340
config = {}
962
341
logger.debug("Creating client %r", self.name)
963
logger.debug(" Key ID: %s", self.key_id)
342
# Uppercase and remove spaces from fingerprint for later
343
# comparison purposes with return value from the fingerprint()
344
# function
345
self.fingerprint = (config["fingerprint"].upper()
346
.replace(" ", ""))
964
347
logger.debug(" Fingerprint: %s", self.fingerprint)
965
self.created = settings.get("created",
966
datetime.datetime.utcnow())
967
968
# attributes specific for this server instance
348
if "secret" in config:
349
self.secret = config["secret"].decode("base64")
350
elif "secfile" in config:
351
with open(os.path.expanduser(os.path.expandvars
352
(config["secfile"])),
353
"rb") as secfile:
354
self.secret = secfile.read()
355
else:
356
raise TypeError("No secret or secfile for client %s"
357
% self.name)
358
self.host = config.get("host", "")
359
self.created = datetime.datetime.utcnow()
360
self.enabled = False
361
self.last_approval_request = None
362
self.last_enabled = None
363
self.last_checked_ok = None
364
self.timeout = string_to_delta(config["timeout"])
365
self.extended_timeout = string_to_delta(config
366
["extended_timeout"])
367
self.interval = string_to_delta(config["interval"])
368
self.disable_hook = disable_hook
969
369
self.checker = None
970
370
self.checker_initiator_tag = None
971
371
self.disable_initiator_tag = None
372
self.expires = None
972
373
self.checker_callback_tag = None
374
self.checker_command = config["checker"]
973
375
self.current_checker_command = None
974
self.approved = None
376
self.last_connect = None
377
self._approved = None
378
self.approved_by_default = config.get("approved_by_default",
379
True)
975
380
self.approvals_pending = 0
976
self.changedstate = multiprocessing_manager.Condition(
977
multiprocessing_manager.Lock())
978
self.client_structure = [attr
979
for attr in self.__dict__.keys()
980
if not attr.startswith("_")]
981
self.client_structure.append("client_structure")
982
983
for name, t in inspect.getmembers(
984
type(self), lambda obj: isinstance(obj, property)):
985
if not name.startswith("_"):
986
self.client_structure.append(name)
987
988
# Send notice to process children that client state has changed
381
self.approval_delay = string_to_delta(
382
config["approval_delay"])
383
self.approval_duration = string_to_delta(
384
config["approval_duration"])
385
self.changedstate = (multiprocessing_manager
386
.Condition(multiprocessing_manager
387
.Lock()))
388
989
389
def send_changedstate(self):
990
with self.changedstate:
991
self.changedstate.notify_all()
992
390
self.changedstate.acquire()
391
self.changedstate.notify_all()
392
self.changedstate.release()
393
993
394
def enable(self):
994
395
"""Start this client's checker and timeout hooks"""
995
396
if getattr(self, "enabled", False):
996
397
# Already enabled
997
398
return
399
self.send_changedstate()
400
# Schedule a new checker to be started an 'interval' from now,
401
# and every interval from then on.
402
self.checker_initiator_tag = (gobject.timeout_add
403
(self.interval_milliseconds(),
404
self.start_checker))
405
# Schedule a disable() when 'timeout' has passed
998
406
self.expires = datetime.datetime.utcnow() + self.timeout
407
self.disable_initiator_tag = (gobject.timeout_add
408
(self.timeout_milliseconds(),
409
self.disable))
999
410
self.enabled = True
1000
411
self.last_enabled = datetime.datetime.utcnow()
1001
self.init_checker()
1002
self.send_changedstate()
1003
412
# Also start a new checker *right now*.
413
self.start_checker()
414
1004
415
def disable(self, quiet=True):
1005
416
"""Disable this client."""
1006
417
if not getattr(self, "enabled", False):
1007
418
return False
1008
419
if not quiet:
420
self.send_changedstate()
421
if not quiet:
1009
422
logger.info("Disabling client %s", self.name)
1010
if getattr(self, "disable_initiator_tag", None) is not None:
1011
GLib.source_remove(self.disable_initiator_tag)
423
if getattr(self, "disable_initiator_tag", False):
424
gobject.source_remove(self.disable_initiator_tag)
1012
425
self.disable_initiator_tag = None
1013
426
self.expires = None
1014
if getattr(self, "checker_initiator_tag", None) is not None:
1015
GLib.source_remove(self.checker_initiator_tag)
427
if getattr(self, "checker_initiator_tag", False):
428
gobject.source_remove(self.checker_initiator_tag)
1016
429
self.checker_initiator_tag = None
1017
430
self.stop_checker()
431
if self.disable_hook:
432
self.disable_hook(self)
1018
433
self.enabled = False
1019
if not quiet:
1020
self.send_changedstate()
1021
# Do not run this again if called by a GLib.timeout_add
434
# Do not run this again if called by a gobject.timeout_add
1022
435
return False
1023
436
1024
437
def __del__(self):
438
self.disable_hook = None
1025
439
self.disable()
1026
1027
def init_checker(self):
1028
# Schedule a new checker to be started an 'interval' from now,
1029
# and every interval from then on.
1030
if self.checker_initiator_tag is not None:
1031
GLib.source_remove(self.checker_initiator_tag)
1032
self.checker_initiator_tag = GLib.timeout_add(
1033
int(self.interval.total_seconds() * 1000),
1034
self.start_checker)
1035
# Schedule a disable() when 'timeout' has passed
1036
if self.disable_initiator_tag is not None:
1037
GLib.source_remove(self.disable_initiator_tag)
1038
self.disable_initiator_tag = GLib.timeout_add(
1039
int(self.timeout.total_seconds() * 1000), self.disable)
1040
# Also start a new checker *right now*.
1041
self.start_checker()
1042
1043
def checker_callback(self, source, condition, connection,
1044
command):
440
441
def checker_callback(self, pid, condition, command):
1045
442
"""The checker has completed, so take appropriate actions."""
1046
# Read return code from connection (see call_pipe)
1047
returncode = connection.recv()
1048
connection.close()
1049
self.checker.join()
1050
443
self.checker_callback_tag = None
1051
444
self.checker = None
1052
1053
if returncode >= 0:
1054
self.last_checker_status = returncode
1055
self.last_checker_signal = None
1056
if self.last_checker_status == 0:
445
if os.WIFEXITED(condition):
446
exitstatus = os.WEXITSTATUS(condition)
447
if exitstatus == 0:
1057
448
logger.info("Checker for %(name)s succeeded",
1058
449
vars(self))
1059
450
self.checked_ok()
1060
451
else:
1061
logger.info("Checker for %(name)s failed", vars(self))
452
logger.info("Checker for %(name)s failed",
453
vars(self))
1062
454
else:
1063
self.last_checker_status = -1
1064
self.last_checker_signal = -returncode
1065
455
logger.warning("Checker for %(name)s crashed?",
1066
456
vars(self))
1067
return False
1068
1069
def checked_ok(self):
1070
"""Assert that the client has been seen, alive and well."""
1071
self.last_checked_ok = datetime.datetime.utcnow()
1072
self.last_checker_status = 0
1073
self.last_checker_signal = None
1074
self.bump_timeout()
1075
1076
def bump_timeout(self, timeout=None):
1077
"""Bump up the timeout for this client."""
457
458
def checked_ok(self, timeout=None):
459
"""Bump up the timeout for this client.
460
461
This should only be called when the client has been seen,
462
alive and well.
463
"""
1078
464
if timeout is None:
1079
465
timeout = self.timeout
466
self.last_checked_ok = datetime.datetime.utcnow()
1080
467
if self.disable_initiator_tag is not None:
1081
GLib.source_remove(self.disable_initiator_tag)
1082
self.disable_initiator_tag = None
468
gobject.source_remove(self.disable_initiator_tag)
1083
469
if getattr(self, "enabled", False):
1084
self.disable_initiator_tag = GLib.timeout_add(
1085
int(timeout.total_seconds() * 1000), self.disable)
470
self.disable_initiator_tag = (gobject.timeout_add
471
(_timedelta_to_milliseconds
472
(timeout), self.disable))
1086
473
self.expires = datetime.datetime.utcnow() + timeout
1087
474
1088
475
def need_approval(self):
1089
476
self.last_approval_request = datetime.datetime.utcnow()
1090
477
1091
478
def start_checker(self):
1092
479
"""Start a new checker subprocess if one is not running.
1093
480
1094
481
If a checker already exists, leave it running and do
1095
482
nothing."""
1096
483
# The reason for not killing a running checker is that if we
1097
# did that, and if a checker (for some reason) started running
1098
# slowly and taking more than 'interval' time, then the client
1099
# would inevitably timeout, since no checker would get a
1100
# chance to run to completion. If we instead leave running
484
# did that, then if a checker (for some reason) started
485
# running slowly and taking more than 'interval' time, the
486
# client would inevitably timeout, since no checker would get
487
# a chance to run to completion. If we instead leave running
1101
488
# checkers alone, the checker would have to take more time
1102
489
# than 'timeout' for the client to be disabled, which is as it
1103
490
# should be.
1104
1105
if self.checker is not None and not self.checker.is_alive():
1106
logger.warning("Checker was not alive; joining")
1107
self.checker.join()
1108
self.checker = None
491
492
# If a checker exists, make sure it is not a zombie
493
try:
494
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
495
except (AttributeError, OSError) as error:
496
if (isinstance(error, OSError)
497
and error.errno != errno.ECHILD):
498
raise error
499
else:
500
if pid:
501
logger.warning("Checker was a zombie")
502
gobject.source_remove(self.checker_callback_tag)
503
self.checker_callback(pid, status,
504
self.current_checker_command)
1109
505
# Start a new checker if needed
1110
506
if self.checker is None:
1111
# Escape attributes for the shell
1112
escaped_attrs = {
1113
attr: re.escape(str(getattr(self, attr)))
1114
for attr in self.runtime_expansions}
1115
507
try:
1116
command = self.checker_command % escaped_attrs
1117
except TypeError as error:
1118
logger.error('Could not format string "%s"',
1119
self.checker_command,
1120
exc_info=error)
1121
return True # Try again later
508
# In case checker_command has exactly one % operator
509
command = self.checker_command % self.host
510
except TypeError:
511
# Escape attributes for the shell
512
escaped_attrs = dict(
513
(attr,
514
re.escape(unicode(str(getattr(self, attr, "")),
515
errors=
516
'replace')))
517
for attr in
518
self.runtime_expansions)
519
520
try:
521
command = self.checker_command % escaped_attrs
522
except TypeError as error:
523
logger.error('Could not format string "%s":'
524
' %s', self.checker_command, error)
525
return True # Try again later
1122
526
self.current_checker_command = command
1123
logger.info("Starting checker %r for %s", command,
1124
self.name)
1125
# We don't need to redirect stdout and stderr, since
1126
# in normal mode, that is already done by daemon(),
1127
# and in debug mode we don't want to. (Stdin is
1128
# always replaced by /dev/null.)
1129
# The exception is when not debugging but nevertheless
1130
# running in the foreground; use the previously
1131
# created wnull.
1132
popen_args = {"close_fds": True,
1133
"shell": True,
1134
"cwd": "/"}
1135
if (not self.server_settings["debug"]
1136
and self.server_settings["foreground"]):
1137
popen_args.update({"stdout": wnull,
1138
"stderr": wnull})
1139
pipe = multiprocessing.Pipe(duplex=False)
1140
self.checker = multiprocessing.Process(
1141
target=call_pipe,
1142
args=(pipe[1], subprocess.call, command),
1143
kwargs=popen_args)
1144
self.checker.start()
1145
self.checker_callback_tag = GLib.io_add_watch(
1146
pipe[0].fileno(), GLib.IO_IN,
1147
self.checker_callback, pipe[0], command)
1148
# Re-run this periodically if run by GLib.timeout_add
527
try:
528
logger.info("Starting checker %r for %s",
529
command, self.name)
530
# We don't need to redirect stdout and stderr, since
531
# in normal mode, that is already done by daemon(),
532
# and in debug mode we don't want to. (Stdin is
533
# always replaced by /dev/null.)
534
self.checker = subprocess.Popen(command,
535
close_fds=True,
536
shell=True, cwd="/")
537
self.checker_callback_tag = (gobject.child_watch_add
538
(self.checker.pid,
539
self.checker_callback,
540
data=command))
541
# The checker may have completed before the gobject
542
# watch was added. Check for this.
543
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
544
if pid:
545
gobject.source_remove(self.checker_callback_tag)
546
self.checker_callback(pid, status, command)
547
except OSError as error:
548
logger.error("Failed to start subprocess: %s",
549
error)
550
# Re-run this periodically if run by gobject.timeout_add
1149
551
return True
1150
552
1151
553
def stop_checker(self):
1152
554
"""Force the checker process, if any, to stop."""
1153
555
if self.checker_callback_tag:
1154
GLib.source_remove(self.checker_callback_tag)
556
gobject.source_remove(self.checker_callback_tag)
1155
557
self.checker_callback_tag = None
1156
558
if getattr(self, "checker", None) is None:
1157
559
return
1158
560
logger.debug("Stopping checker for %(name)s", vars(self))
1159
self.checker.terminate()
561
try:
562
os.kill(self.checker.pid, signal.SIGTERM)
563
#time.sleep(0.5)
564
#if self.checker.poll() is None:
565
# os.kill(self.checker.pid, signal.SIGKILL)
566
except OSError as error:
567
if error.errno != errno.ESRCH: # No such process
568
raise
1160
569
self.checker = None
1161
570
1162
571
1163
def dbus_service_property(dbus_interface,
1164
signature="v",
1165
access="readwrite",
1166
byte_arrays=False):
572
def dbus_service_property(dbus_interface, signature="v",
573
access="readwrite", byte_arrays=False):
1167
574
"""Decorators for marking methods of a DBusObjectWithProperties to
1168
575
become properties on the D-Bus.
1169
576
1170
577
The decorated method will be called with no arguments by "Get"
1171
578
and with one argument by "Set".
1172
579
1173
580
The parameters, where they are supported, are the same as
1174
581
dbus.service.method, except there is only "signature", since the
1175
582
type from Get() and the type sent to Set() is the same.
1178
585
# "Set" method, so we fail early here:
1179
586
if byte_arrays and signature != "ay":
1180
587
raise ValueError("Byte arrays not supported for non-'ay'"
1181
" signature {!r}".format(signature))
1182
588
" signature %r" % signature)
1183
589
def decorator(func):
1184
590
func._dbus_is_property = True
1185
591
func._dbus_interface = dbus_interface
1188
594
func._dbus_name = func.__name__
1189
595
if func._dbus_name.endswith("_dbus_property"):
1190
596
func._dbus_name = func._dbus_name[:-14]
1191
func._dbus_get_args_options = {'byte_arrays': byte_arrays}
1192
return func
1193
1194
return decorator
1195
1196
1197
def dbus_interface_annotations(dbus_interface):
1198
"""Decorator for marking functions returning interface annotations
1199
1200
Usage:
1201
1202
@dbus_interface_annotations("org.example.Interface")
1203
def _foo(self): # Function name does not matter
1204
return {"org.freedesktop.DBus.Deprecated": "true",
1205
"org.freedesktop.DBus.Property.EmitsChangedSignal":
1206
"false"}
1207
"""
1208
1209
def decorator(func):
1210
func._dbus_is_interface = True
1211
func._dbus_interface = dbus_interface
1212
func._dbus_name = dbus_interface
1213
return func
1214
1215
return decorator
1216
1217
1218
def dbus_annotations(annotations):
1219
"""Decorator to annotate D-Bus methods, signals or properties
1220
Usage:
1221
1222
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
1223
"org.freedesktop.DBus.Property."
1224
"EmitsChangedSignal": "false"})
1225
@dbus_service_property("org.example.Interface", signature="b",
1226
access="r")
1227
def Property_dbus_property(self):
1228
return dbus.Boolean(False)
1229
1230
See also the DBusObjectWithAnnotations class.
1231
"""
1232
1233
def decorator(func):
1234
func._dbus_annotations = annotations
1235
return func
1236
597
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
598
return func
1237
599
return decorator
1238
600
1239
601
1240
602
class DBusPropertyException(dbus.exceptions.DBusException):
1241
603
"""A base class for D-Bus property-related exceptions
1242
604
"""
1243
pass
605
def __unicode__(self):
606
return unicode(str(self))
1244
607
1245
608
1246
609
class DBusPropertyAccessException(DBusPropertyException):
1255
618
pass
1256
619
1257
620
1258
class DBusObjectWithAnnotations(dbus.service.Object):
1259
"""A D-Bus object with annotations.
1260
1261
Classes inheriting from this can use the dbus_annotations
1262
decorator to add annotations to methods or signals.
1263
"""
1264
1265
@staticmethod
1266
def _is_dbus_thing(thing):
1267
"""Returns a function testing if an attribute is a D-Bus thing
1268
1269
If called like _is_dbus_thing("method") it returns a function
1270
suitable for use as predicate to inspect.getmembers().
1271
"""
1272
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
1273
False)
1274
1275
def _get_all_dbus_things(self, thing):
1276
"""Returns a generator of (name, attribute) pairs
1277
"""
1278
return ((getattr(athing.__get__(self), "_dbus_name", name),
1279
athing.__get__(self))
1280
for cls in self.__class__.__mro__
1281
for name, athing in
1282
inspect.getmembers(cls, self._is_dbus_thing(thing)))
1283
1284
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1285
out_signature="s",
1286
path_keyword='object_path',
1287
connection_keyword='connection')
1288
def Introspect(self, object_path, connection):
1289
"""Overloading of standard D-Bus method.
1290
1291
Inserts annotation tags on methods and signals.
1292
"""
1293
xmlstring = dbus.service.Object.Introspect(self, object_path,
1294
connection)
1295
try:
1296
document = xml.dom.minidom.parseString(xmlstring)
1297
1298
for if_tag in document.getElementsByTagName("interface"):
1299
# Add annotation tags
1300
for typ in ("method", "signal"):
1301
for tag in if_tag.getElementsByTagName(typ):
1302
annots = dict()
1303
for name, prop in (self.
1304
_get_all_dbus_things(typ)):
1305
if (name == tag.getAttribute("name")
1306
and prop._dbus_interface
1307
== if_tag.getAttribute("name")):
1308
annots.update(getattr(
1309
prop, "_dbus_annotations", {}))
1310
for name, value in annots.items():
1311
ann_tag = document.createElement(
1312
"annotation")
1313
ann_tag.setAttribute("name", name)
1314
ann_tag.setAttribute("value", value)
1315
tag.appendChild(ann_tag)
1316
# Add interface annotation tags
1317
for annotation, value in dict(
1318
itertools.chain.from_iterable(
1319
annotations().items()
1320
for name, annotations
1321
in self._get_all_dbus_things("interface")
1322
if name == if_tag.getAttribute("name")
1323
)).items():
1324
ann_tag = document.createElement("annotation")
1325
ann_tag.setAttribute("name", annotation)
1326
ann_tag.setAttribute("value", value)
1327
if_tag.appendChild(ann_tag)
1328
# Fix argument name for the Introspect method itself
1329
if (if_tag.getAttribute("name")
1330
== dbus.INTROSPECTABLE_IFACE):
1331
for cn in if_tag.getElementsByTagName("method"):
1332
if cn.getAttribute("name") == "Introspect":
1333
for arg in cn.getElementsByTagName("arg"):
1334
if (arg.getAttribute("direction")
1335
== "out"):
1336
arg.setAttribute("name",
1337
"xml_data")
1338
xmlstring = document.toxml("utf-8")
1339
document.unlink()
1340
except (AttributeError, xml.dom.DOMException,
1341
xml.parsers.expat.ExpatError) as error:
1342
logger.error("Failed to override Introspection method",
1343
exc_info=error)
1344
return xmlstring
1345
1346
1347
class DBusObjectWithProperties(DBusObjectWithAnnotations):
621
class DBusObjectWithProperties(dbus.service.Object):
1348
622
"""A D-Bus object with properties.
1349
623
1350
624
Classes inheriting from this can use the dbus_service_property
1351
625
decorator to expose methods as D-Bus properties. It exposes the
1352
626
standard Get(), Set(), and GetAll() methods on the D-Bus.
1353
627
"""
1354
628
629
@staticmethod
630
def _is_dbus_property(obj):
631
return getattr(obj, "_dbus_is_property", False)
632
633
def _get_all_dbus_properties(self):
634
"""Returns a generator of (name, attribute) pairs
635
"""
636
return ((prop.__get__(self)._dbus_name, prop.__get__(self))
637
for cls in self.__class__.__mro__
638
for name, prop in
639
inspect.getmembers(cls, self._is_dbus_property))
640
1355
641
def _get_dbus_property(self, interface_name, property_name):
1356
642
"""Returns a bound method if one exists which is a D-Bus
1357
643
property with the specified name and interface.
1358
644
"""
1359
for cls in self.__class__.__mro__:
1360
for name, value in inspect.getmembers(
1361
cls, self._is_dbus_thing("property")):
645
for cls in self.__class__.__mro__:
646
for name, value in (inspect.getmembers
647
(cls, self._is_dbus_property)):
1362
648
if (value._dbus_name == property_name
1363
649
and value._dbus_interface == interface_name):
1364
650
return value.__get__(self)
1365
651
1366
652
# No such property
1367
raise DBusPropertyNotFound("{}:{}.{}".format(
1368
self.dbus_object_path, interface_name, property_name))
1369
1370
@classmethod
1371
def _get_all_interface_names(cls):
1372
"""Get a sequence of all interfaces supported by an object"""
1373
return (name for name in set(getattr(getattr(x, attr),
1374
"_dbus_interface", None)
1375
for x in (inspect.getmro(cls))
1376
for attr in dir(x))
1377
if name is not None)
1378
1379
@dbus.service.method(dbus.PROPERTIES_IFACE,
1380
in_signature="ss",
653
raise DBusPropertyNotFound(self.dbus_object_path + ":"
654
+ interface_name + "."
655
+ property_name)
656
657
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
1381
658
out_signature="v")
1382
659
def Get(self, interface_name, property_name):
1383
660
"""Standard D-Bus property Get() method, see D-Bus standard.
1389
666
if not hasattr(value, "variant_level"):
1390
667
return value
1391
668
return type(value)(value, variant_level=value.variant_level+1)
1392
669
1393
670
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
1394
671
def Set(self, interface_name, property_name, value):
1395
672
"""Standard D-Bus property Set() method, see D-Bus standard.
1401
678
# The byte_arrays option is not supported yet on
1402
679
# signatures other than "ay".
1403
680
if prop._dbus_signature != "ay":
1404
raise ValueError("Byte arrays not supported for non-"
1405
"'ay' signature {!r}"
1406
.format(prop._dbus_signature))
1407
value = dbus.ByteArray(b''.join(chr(byte)
1408
for byte in value))
681
raise ValueError
682
value = dbus.ByteArray(''.join(unichr(byte)
683
for byte in value))
1409
684
prop(value)
1410
1411
@dbus.service.method(dbus.PROPERTIES_IFACE,
1412
in_signature="s",
685
686
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
1413
687
out_signature="a{sv}")
1414
688
def GetAll(self, interface_name):
1415
689
"""Standard D-Bus property GetAll() method, see D-Bus
1416
690
standard.
1417
691
1418
692
Note: Will not include properties with access="write".
1419
693
"""
1420
properties = {}
1421
for name, prop in self._get_all_dbus_things("property"):
694
all = {}
695
for name, prop in self._get_all_dbus_properties():
1422
696
if (interface_name
1423
697
and interface_name != prop._dbus_interface):
1424
698
# Interface non-empty but did not match
1428
702
continue
1429
703
value = prop()
1430
704
if not hasattr(value, "variant_level"):
1431
properties[name] = value
705
all[name] = value
1432
706
continue
1433
properties[name] = type(value)(
1434
value, variant_level=value.variant_level + 1)
1435
return dbus.Dictionary(properties, signature="sv")
1436
1437
@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
1438
def PropertiesChanged(self, interface_name, changed_properties,
1439
invalidated_properties):
1440
"""Standard D-Bus PropertiesChanged() signal, see D-Bus
1441
standard.
1442
"""
1443
pass
1444
707
all[name] = type(value)(value, variant_level=
708
value.variant_level+1)
709
return dbus.Dictionary(all, signature="sv")
710
1445
711
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1446
712
out_signature="s",
1447
713
path_keyword='object_path',
1448
714
connection_keyword='connection')
1449
715
def Introspect(self, object_path, connection):
1450
"""Overloading of standard D-Bus method.
1451
1452
Inserts property tags and interface annotation tags.
716
"""Standard D-Bus method, overloaded to insert property tags.
1453
717
"""
1454
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1455
object_path,
1456
connection)
718
xmlstring = dbus.service.Object.Introspect(self, object_path,
719
connection)
1457
720
try:
1458
721
document = xml.dom.minidom.parseString(xmlstring)
1459
1460
722
def make_tag(document, name, prop):
1461
723
e = document.createElement("property")
1462
724
e.setAttribute("name", name)
1463
725
e.setAttribute("type", prop._dbus_signature)
1464
726
e.setAttribute("access", prop._dbus_access)
1465
727
return e
1466
1467
728
for if_tag in document.getElementsByTagName("interface"):
1468
# Add property tags
1469
729
for tag in (make_tag(document, name, prop)
1470
730
for name, prop
1471
in self._get_all_dbus_things("property")
731
in self._get_all_dbus_properties()
1472
732
if prop._dbus_interface
1473
733
== if_tag.getAttribute("name")):
1474
734
if_tag.appendChild(tag)
1475
# Add annotation tags for properties
1476
for tag in if_tag.getElementsByTagName("property"):
1477
annots = dict()
1478
for name, prop in self._get_all_dbus_things(
1479
"property"):
1480
if (name == tag.getAttribute("name")
1481
and prop._dbus_interface
1482
== if_tag.getAttribute("name")):
1483
annots.update(getattr(
1484
prop, "_dbus_annotations", {}))
1485
for name, value in annots.items():
1486
ann_tag = document.createElement(
1487
"annotation")
1488
ann_tag.setAttribute("name", name)
1489
ann_tag.setAttribute("value", value)
1490
tag.appendChild(ann_tag)
1491
735
# Add the names to the return values for the
1492
736
# "org.freedesktop.DBus.Properties" methods
1493
737
if (if_tag.getAttribute("name")
1508
752
except (AttributeError, xml.dom.DOMException,
1509
753
xml.parsers.expat.ExpatError) as error:
1510
754
logger.error("Failed to override Introspection method",
1511
exc_info=error)
1512
return xmlstring
1513
1514
1515
try:
1516
dbus.OBJECT_MANAGER_IFACE
1517
except AttributeError:
1518
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1519
1520
1521
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1522
"""A D-Bus object with an ObjectManager.
1523
1524
Classes inheriting from this exposes the standard
1525
GetManagedObjects call and the InterfacesAdded and
1526
InterfacesRemoved signals on the standard
1527
"org.freedesktop.DBus.ObjectManager" interface.
1528
1529
Note: No signals are sent automatically; they must be sent
1530
manually.
1531
"""
1532
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1533
out_signature="a{oa{sa{sv}}}")
1534
def GetManagedObjects(self):
1535
"""This function must be overridden"""
1536
raise NotImplementedError()
1537
1538
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1539
signature="oa{sa{sv}}")
1540
def InterfacesAdded(self, object_path, interfaces_and_properties):
1541
pass
1542
1543
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1544
def InterfacesRemoved(self, object_path, interfaces):
1545
pass
1546
1547
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1548
out_signature="s",
1549
path_keyword='object_path',
1550
connection_keyword='connection')
1551
def Introspect(self, object_path, connection):
1552
"""Overloading of standard D-Bus method.
1553
1554
Override return argument name of GetManagedObjects to be
1555
"objpath_interfaces_and_properties"
1556
"""
1557
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1558
object_path,
1559
connection)
1560
try:
1561
document = xml.dom.minidom.parseString(xmlstring)
1562
1563
for if_tag in document.getElementsByTagName("interface"):
1564
# Fix argument name for the GetManagedObjects method
1565
if (if_tag.getAttribute("name")
1566
== dbus.OBJECT_MANAGER_IFACE):
1567
for cn in if_tag.getElementsByTagName("method"):
1568
if (cn.getAttribute("name")
1569
== "GetManagedObjects"):
1570
for arg in cn.getElementsByTagName("arg"):
1571
if (arg.getAttribute("direction")
1572
== "out"):
1573
arg.setAttribute(
1574
"name",
1575
"objpath_interfaces"
1576
"_and_properties")
1577
xmlstring = document.toxml("utf-8")
1578
document.unlink()
1579
except (AttributeError, xml.dom.DOMException,
1580
xml.parsers.expat.ExpatError) as error:
1581
logger.error("Failed to override Introspection method",
1582
exc_info=error)
1583
return xmlstring
1584
1585
1586
def datetime_to_dbus(dt, variant_level=0):
755
error)
756
return xmlstring
757
758
759
def datetime_to_dbus (dt, variant_level=0):
1587
760
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1588
761
if dt is None:
1589
return dbus.String("", variant_level=variant_level)
1590
return dbus.String(dt.isoformat(), variant_level=variant_level)
1591
1592
1593
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1594
"""A class decorator; applied to a subclass of
1595
dbus.service.Object, it will add alternate D-Bus attributes with
1596
interface names according to the "alt_interface_names" mapping.
1597
Usage:
1598
1599
@alternate_dbus_interfaces({"org.example.Interface":
1600
"net.example.AlternateInterface"})
1601
class SampleDBusObject(dbus.service.Object):
1602
@dbus.service.method("org.example.Interface")
1603
def SampleDBusMethod():
1604
pass
1605
1606
The above "SampleDBusMethod" on "SampleDBusObject" will be
1607
reachable via two interfaces: "org.example.Interface" and
1608
"net.example.AlternateInterface", the latter of which will have
1609
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1610
"true", unless "deprecate" is passed with a False value.
1611
1612
This works for methods and signals, and also for D-Bus properties
1613
(from DBusObjectWithProperties) and interfaces (from the
1614
dbus_interface_annotations decorator).
762
return dbus.String("", variant_level = variant_level)
763
return dbus.String(dt.isoformat(),
764
variant_level=variant_level)
765
766
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
767
.__metaclass__):
768
"""Applied to an empty subclass of a D-Bus object, this metaclass
769
will add additional D-Bus attributes matching a certain pattern.
1615
770
"""
1616
1617
def wrapper(cls):
1618
for orig_interface_name, alt_interface_name in (
1619
alt_interface_names.items()):
1620
attr = {}
1621
interface_names = set()
1622
# Go though all attributes of the class
1623
for attrname, attribute in inspect.getmembers(cls):
771
def __new__(mcs, name, bases, attr):
772
# Go through all the base classes which could have D-Bus
773
# methods, signals, or properties in them
774
for base in (b for b in bases
775
if issubclass(b, dbus.service.Object)):
776
# Go though all attributes of the base class
777
for attrname, attribute in inspect.getmembers(base):
1624
778
# Ignore non-D-Bus attributes, and D-Bus attributes
1625
779
# with the wrong interface name
1626
780
if (not hasattr(attribute, "_dbus_interface")
1627
or not attribute._dbus_interface.startswith(
1628
orig_interface_name)):
781
or not attribute._dbus_interface
782
.startswith("se.recompile.Mandos")):
1629
783
continue
1630
784
# Create an alternate D-Bus interface name based on
1631
785
# the current name
1632
alt_interface = attribute._dbus_interface.replace(
1633
orig_interface_name, alt_interface_name)
1634
interface_names.add(alt_interface)
786
alt_interface = (attribute._dbus_interface
787
.replace("se.recompile.Mandos",
788
"se.bsnet.fukt.Mandos"))
1635
789
# Is this a D-Bus signal?
1636
790
if getattr(attribute, "_dbus_is_signal", False):
1637
# Extract the original non-method undecorated
1638
# function by black magic
1639
if sys.version_info.major == 2:
1640
nonmethod_func = (dict(
791
# Extract the original non-method function by
792
# black magic
793
nonmethod_func = (dict(
1641
794
zip(attribute.func_code.co_freevars,
1642
attribute.__closure__))
1643
["func"].cell_contents)
1644
else:
1645
nonmethod_func = (dict(
1646
zip(attribute.__code__.co_freevars,
1647
attribute.__closure__))
1648
["func"].cell_contents)
795
attribute.__closure__))["func"]
796
.cell_contents)
1649
797
# Create a new, but exactly alike, function
1650
798
# object, and decorate it to be a new D-Bus signal
1651
799
# with the alternate D-Bus interface name
1652
new_function = copy_function(nonmethod_func)
1653
new_function = (dbus.service.signal(
1654
alt_interface,
1655
attribute._dbus_signature)(new_function))
1656
# Copy annotations, if any
1657
try:
1658
new_function._dbus_annotations = dict(
1659
attribute._dbus_annotations)
1660
except AttributeError:
1661
pass
1662
800
new_function = (dbus.service.signal
801
(alt_interface,
802
attribute._dbus_signature)
803
(types.FunctionType(
804
nonmethod_func.func_code,
805
nonmethod_func.func_globals,
806
nonmethod_func.func_name,
807
nonmethod_func.func_defaults,
808
nonmethod_func.func_closure)))
1663
809
# Define a creator of a function to call both the
1664
# original and alternate functions, so both the
1665
# original and alternate signals gets sent when
1666
# the function is called
810
# old and new functions, so both the old and new
811
# signals gets sent when the function is called
1667
812
def fixscope(func1, func2):
1668
813
"""This function is a scope container to pass
1669
814
func1 and func2 to the "call_both" function
1670
815
outside of its arguments"""
1671
1672
@functools.wraps(func2)
1673
816
def call_both(*args, **kwargs):
1674
817
"""This function will emit two D-Bus
1675
818
signals by calling func1 and func2"""
1676
819
func1(*args, **kwargs)
1677
820
func2(*args, **kwargs)
1678
# Make wrapper function look like a D-Bus
1679
# signal
1680
for name, attr in inspect.getmembers(func2):
1681
if name.startswith("_dbus_"):
1682
setattr(call_both, name, attr)
1683
1684
821
return call_both
1685
822
# Create the "call_both" function and add it to
1686
823
# the class
1687
attr[attrname] = fixscope(attribute, new_function)
824
attr[attrname] = fixscope(attribute,
825
new_function)
1688
826
# Is this a D-Bus method?
1689
827
elif getattr(attribute, "_dbus_is_method", False):
1690
828
# Create a new, but exactly alike, function
1691
829
# object. Decorate it to be a new D-Bus method
1692
830
# with the alternate D-Bus interface name. Add it
1693
831
# to the class.
1694
attr[attrname] = (
1695
dbus.service.method(
1696
alt_interface,
1697
attribute._dbus_in_signature,
1698
attribute._dbus_out_signature)
1699
(copy_function(attribute)))
1700
# Copy annotations, if any
1701
try:
1702
attr[attrname]._dbus_annotations = dict(
1703
attribute._dbus_annotations)
1704
except AttributeError:
1705
pass
832
attr[attrname] = (dbus.service.method
833
(alt_interface,
834
attribute._dbus_in_signature,
835
attribute._dbus_out_signature)
836
(types.FunctionType
837
(attribute.func_code,
838
attribute.func_globals,
839
attribute.func_name,
840
attribute.func_defaults,
841
attribute.func_closure)))
1706
842
# Is this a D-Bus property?
1707
843
elif getattr(attribute, "_dbus_is_property", False):
1708
844
# Create a new, but exactly alike, function
1709
845
# object, and decorate it to be a new D-Bus
1710
846
# property with the alternate D-Bus interface
1711
847
# name. Add it to the class.
1712
attr[attrname] = (dbus_service_property(
1713
alt_interface, attribute._dbus_signature,
1714
attribute._dbus_access,
1715
attribute._dbus_get_args_options
1716
["byte_arrays"])
1717
(copy_function(attribute)))
1718
# Copy annotations, if any
1719
try:
1720
attr[attrname]._dbus_annotations = dict(
1721
attribute._dbus_annotations)
1722
except AttributeError:
1723
pass
1724
# Is this a D-Bus interface?
1725
elif getattr(attribute, "_dbus_is_interface", False):
1726
# Create a new, but exactly alike, function
1727
# object. Decorate it to be a new D-Bus interface
1728
# with the alternate D-Bus interface name. Add it
1729
# to the class.
1730
attr[attrname] = (
1731
dbus_interface_annotations(alt_interface)
1732
(copy_function(attribute)))
1733
if deprecate:
1734
# Deprecate all alternate interfaces
1735
iname = "_AlternateDBusNames_interface_annotation{}"
1736
for interface_name in interface_names:
1737
1738
@dbus_interface_annotations(interface_name)
1739
def func(self):
1740
return {"org.freedesktop.DBus.Deprecated":
1741
"true"}
1742
# Find an unused name
1743
for aname in (iname.format(i)
1744
for i in itertools.count()):
1745
if aname not in attr:
1746
attr[aname] = func
1747
break
1748
if interface_names:
1749
# Replace the class with a new subclass of it with
1750
# methods, signals, etc. as created above.
1751
if sys.version_info.major == 2:
1752
cls = type(b"{}Alternate".format(cls.__name__),
1753
(cls, ), attr)
1754
else:
1755
cls = type("{}Alternate".format(cls.__name__),
1756
(cls, ), attr)
1757
return cls
1758
1759
return wrapper
1760
1761
1762
@alternate_dbus_interfaces({"se.recompile.Mandos":
1763
"se.bsnet.fukt.Mandos"})
848
attr[attrname] = (dbus_service_property
849
(alt_interface,
850
attribute._dbus_signature,
851
attribute._dbus_access,
852
attribute
853
._dbus_get_args_options
854
["byte_arrays"])
855
(types.FunctionType
856
(attribute.func_code,
857
attribute.func_globals,
858
attribute.func_name,
859
attribute.func_defaults,
860
attribute.func_closure)))
861
return type.__new__(mcs, name, bases, attr)
862
1764
863
class ClientDBus(Client, DBusObjectWithProperties):
1765
864
"""A Client class using D-Bus
1766
865
1767
866
Attributes:
1768
867
dbus_object_path: dbus.ObjectPath
1769
868
bus: dbus.SystemBus()
1770
869
"""
1771
870
1772
871
runtime_expansions = (Client.runtime_expansions
1773
+ ("dbus_object_path", ))
1774
1775
_interface = "se.recompile.Mandos.Client"
1776
872
+ ("dbus_object_path",))
873
1777
874
# dbus.service.Object doesn't use super(), so we can't either.
1778
1779
def __init__(self, bus=None, *args, **kwargs):
875
876
def __init__(self, bus = None, *args, **kwargs):
877
self._approvals_pending = 0
1780
878
self.bus = bus
1781
879
Client.__init__(self, *args, **kwargs)
1782
880
# Only now, when this client is initialized, can it show up on
1783
881
# the D-Bus
1784
client_object_name = str(self.name).translate(
882
client_object_name = unicode(self.name).translate(
1785
883
{ord("."): ord("_"),
1786
884
ord("-"): ord("_")})
1787
self.dbus_object_path = dbus.ObjectPath(
1788
"/clients/" + client_object_name)
885
self.dbus_object_path = (dbus.ObjectPath
886
("/clients/" + client_object_name))
1789
887
DBusObjectWithProperties.__init__(self, self.bus,
1790
888
self.dbus_object_path)
1791
1792
def notifychangeproperty(transform_func, dbus_name,
1793
type_func=lambda x: x,
1794
variant_level=1,
1795
invalidate_only=False,
1796
_interface=_interface):
889
890
def notifychangeproperty(transform_func,
891
dbus_name, type_func=lambda x: x,
892
variant_level=1):
1797
893
""" Modify a variable so that it's a property which announces
1798
894
its changes to DBus.
1799
895
1804
900
to the D-Bus. Default: no transform
1805
901
variant_level: D-Bus variant level. Default: 1
1806
902
"""
1807
attrname = "_{}".format(dbus_name)
1808
903
attrname = "_{0}".format(dbus_name)
1809
904
def setter(self, value):
1810
905
if hasattr(self, "dbus_object_path"):
1811
906
if (not hasattr(self, attrname) or
1812
907
type_func(getattr(self, attrname, None))
1813
908
!= type_func(value)):
1814
if invalidate_only:
1815
self.PropertiesChanged(
1816
_interface, dbus.Dictionary(),
1817
dbus.Array((dbus_name, )))
1818
else:
1819
dbus_value = transform_func(
1820
type_func(value),
1821
variant_level=variant_level)
1822
self.PropertyChanged(dbus.String(dbus_name),
1823
dbus_value)
1824
self.PropertiesChanged(
1825
_interface,
1826
dbus.Dictionary({dbus.String(dbus_name):
1827
dbus_value}),
1828
dbus.Array())
909
dbus_value = transform_func(type_func(value),
910
variant_level
911
=variant_level)
912
self.PropertyChanged(dbus.String(dbus_name),
913
dbus_value)
1829
914
setattr(self, attrname, value)
1830
915
1831
916
return property(lambda self: getattr(self, attrname), setter)
1832
917
918
1833
919
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1834
920
approvals_pending = notifychangeproperty(dbus.Boolean,
1835
921
"ApprovalPending",
1836
type_func=bool)
922
type_func = bool)
1837
923
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1838
924
last_enabled = notifychangeproperty(datetime_to_dbus,
1839
925
"LastEnabled")
1840
checker = notifychangeproperty(
1841
dbus.Boolean, "CheckerRunning",
1842
type_func=lambda checker: checker is not None)
926
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
927
type_func = lambda checker:
928
checker is not None)
1843
929
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1844
930
"LastCheckedOK")
1845
last_checker_status = notifychangeproperty(dbus.Int16,
1846
"LastCheckerStatus")
1847
931
last_approval_request = notifychangeproperty(
1848
932
datetime_to_dbus, "LastApprovalRequest")
1849
933
approved_by_default = notifychangeproperty(dbus.Boolean,
1850
934
"ApprovedByDefault")
1851
approval_delay = notifychangeproperty(
1852
dbus.UInt64, "ApprovalDelay",
1853
type_func=lambda td: td.total_seconds() * 1000)
935
approval_delay = notifychangeproperty(dbus.UInt16,
936
"ApprovalDelay",
937
type_func =
938
_timedelta_to_milliseconds)
1854
939
approval_duration = notifychangeproperty(
1855
dbus.UInt64, "ApprovalDuration",
1856
type_func=lambda td: td.total_seconds() * 1000)
940
dbus.UInt16, "ApprovalDuration",
941
type_func = _timedelta_to_milliseconds)
1857
942
host = notifychangeproperty(dbus.String, "Host")
1858
timeout = notifychangeproperty(
1859
dbus.UInt64, "Timeout",
1860
type_func=lambda td: td.total_seconds() * 1000)
943
timeout = notifychangeproperty(dbus.UInt16, "Timeout",
944
type_func =
945
_timedelta_to_milliseconds)
1861
946
extended_timeout = notifychangeproperty(
1862
dbus.UInt64, "ExtendedTimeout",
1863
type_func=lambda td: td.total_seconds() * 1000)
1864
interval = notifychangeproperty(
1865
dbus.UInt64, "Interval",
1866
type_func=lambda td: td.total_seconds() * 1000)
947
dbus.UInt16, "ExtendedTimeout",
948
type_func = _timedelta_to_milliseconds)
949
interval = notifychangeproperty(dbus.UInt16,
950
"Interval",
951
type_func =
952
_timedelta_to_milliseconds)
1867
953
checker_command = notifychangeproperty(dbus.String, "Checker")
1868
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1869
invalidate_only=True)
1870
954
1871
955
del notifychangeproperty
1872
956
1873
957
def __del__(self, *args, **kwargs):
1874
958
try:
1875
959
self.remove_from_connection()
1878
962
if hasattr(DBusObjectWithProperties, "__del__"):
1879
963
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1880
964
Client.__del__(self, *args, **kwargs)
1881
1882
def checker_callback(self, source, condition,
1883
connection, command, *args, **kwargs):
1884
ret = Client.checker_callback(self, source, condition,
1885
connection, command, *args,
1886
**kwargs)
1887
exitstatus = self.last_checker_status
1888
if exitstatus >= 0:
965
966
def checker_callback(self, pid, condition, command,
967
*args, **kwargs):
968
self.checker_callback_tag = None
969
self.checker = None
970
if os.WIFEXITED(condition):
971
exitstatus = os.WEXITSTATUS(condition)
1889
972
# Emit D-Bus signal
1890
973
self.CheckerCompleted(dbus.Int16(exitstatus),
1891
# This is specific to GNU libC
1892
dbus.Int64(exitstatus << 8),
974
dbus.Int64(condition),
1893
975
dbus.String(command))
1894
976
else:
1895
977
# Emit D-Bus signal
1896
978
self.CheckerCompleted(dbus.Int16(-1),
1897
dbus.Int64(
1898
# This is specific to GNU libC
1899
(exitstatus << 8)
1900
| self.last_checker_signal),
979
dbus.Int64(condition),
1901
980
dbus.String(command))
1902
return ret
1903
981
982
return Client.checker_callback(self, pid, condition, command,
983
*args, **kwargs)
984
1904
985
def start_checker(self, *args, **kwargs):
1905
old_checker_pid = getattr(self.checker, "pid", None)
986
old_checker = self.checker
987
if self.checker is not None:
988
old_checker_pid = self.checker.pid
989
else:
990
old_checker_pid = None
1906
991
r = Client.start_checker(self, *args, **kwargs)
1907
992
# Only if new checker process was started
1908
993
if (self.checker is not None
1910
995
# Emit D-Bus signal
1911
996
self.CheckerStarted(self.current_checker_command)
1912
997
return r
1913
998
1914
999
def _reset_approved(self):
1915
self.approved = None
1000
self._approved = None
1916
1001
return False
1917
1002
1918
1003
def approve(self, value=True):
1919
self.approved = value
1920
GLib.timeout_add(int(self.approval_duration.total_seconds()
1921
* 1000), self._reset_approved)
1922
1004
self.send_changedstate()
1923
1924
# D-Bus methods, signals & properties
1925
1926
# Interfaces
1927
1928
# Signals
1929
1005
self._approved = value
1006
gobject.timeout_add(_timedelta_to_milliseconds
1007
(self.approval_duration),
1008
self._reset_approved)
1009
1010
1011
## D-Bus methods, signals & properties
1012
_interface = "se.recompile.Mandos.Client"
1013
1014
## Signals
1015
1930
1016
# CheckerCompleted - signal
1931
1017
@dbus.service.signal(_interface, signature="nxs")
1932
1018
def CheckerCompleted(self, exitcode, waitstatus, command):
1933
1019
"D-Bus signal"
1934
1020
pass
1935
1021
1936
1022
# CheckerStarted - signal
1937
1023
@dbus.service.signal(_interface, signature="s")
1938
1024
def CheckerStarted(self, command):
1939
1025
"D-Bus signal"
1940
1026
pass
1941
1027
1942
1028
# PropertyChanged - signal
1943
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1944
1029
@dbus.service.signal(_interface, signature="sv")
1945
1030
def PropertyChanged(self, property, value):
1946
1031
"D-Bus signal"
1947
1032
pass
1948
1033
1949
1034
# GotSecret - signal
1950
1035
@dbus.service.signal(_interface)
1951
1036
def GotSecret(self):
1954
1039
server to mandos-client
1955
1040
"""
1956
1041
pass
1957
1042
1958
1043
# Rejected - signal
1959
1044
@dbus.service.signal(_interface, signature="s")
1960
1045
def Rejected(self, reason):
1961
1046
"D-Bus signal"
1962
1047
pass
1963
1048
1964
1049
# NeedApproval - signal
1965
1050
@dbus.service.signal(_interface, signature="tb")
1966
1051
def NeedApproval(self, timeout, default):
1967
1052
"D-Bus signal"
1968
1053
return self.need_approval()
1969
1970
# Methods
1971
1054
1055
## Methods
1056
1972
1057
# Approve - method
1973
1058
@dbus.service.method(_interface, in_signature="b")
1974
1059
def Approve(self, value):
1975
1060
self.approve(value)
1976
1061
1977
1062
# CheckedOK - method
1978
1063
@dbus.service.method(_interface)
1979
1064
def CheckedOK(self):
1980
1065
self.checked_ok()
1981
1066
1982
1067
# Enable - method
1983
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1984
1068
@dbus.service.method(_interface)
1985
1069
def Enable(self):
1986
1070
"D-Bus method"
1987
1071
self.enable()
1988
1072
1989
1073
# StartChecker - method
1990
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1991
1074
@dbus.service.method(_interface)
1992
1075
def StartChecker(self):
1993
1076
"D-Bus method"
1994
1077
self.start_checker()
1995
1078
1996
1079
# Disable - method
1997
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1998
1080
@dbus.service.method(_interface)
1999
1081
def Disable(self):
2000
1082
"D-Bus method"
2001
1083
self.disable()
2002
1084
2003
1085
# StopChecker - method
2004
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
2005
1086
@dbus.service.method(_interface)
2006
1087
def StopChecker(self):
2007
1088
self.stop_checker()
2008
2009
# Properties
2010
1089
1090
## Properties
1091
2011
1092
# ApprovalPending - property
2012
1093
@dbus_service_property(_interface, signature="b", access="read")
2013
1094
def ApprovalPending_dbus_property(self):
2014
1095
return dbus.Boolean(bool(self.approvals_pending))
2015
1096
2016
1097
# ApprovedByDefault - property
2017
@dbus_service_property(_interface,
2018
signature="b",
1098
@dbus_service_property(_interface, signature="b",
2019
1099
access="readwrite")
2020
1100
def ApprovedByDefault_dbus_property(self, value=None):
2021
1101
if value is None: # get
2022
1102
return dbus.Boolean(self.approved_by_default)
2023
1103
self.approved_by_default = bool(value)
2024
1104
2025
1105
# ApprovalDelay - property
2026
@dbus_service_property(_interface,
2027
signature="t",
1106
@dbus_service_property(_interface, signature="t",
2028
1107
access="readwrite")
2029
1108
def ApprovalDelay_dbus_property(self, value=None):
2030
1109
if value is None: # get
2031
return dbus.UInt64(self.approval_delay.total_seconds()
2032
* 1000)
1110
return dbus.UInt64(self.approval_delay_milliseconds())
2033
1111
self.approval_delay = datetime.timedelta(0, 0, 0, value)
2034
1112
2035
1113
# ApprovalDuration - property
2036
@dbus_service_property(_interface,
2037
signature="t",
1114
@dbus_service_property(_interface, signature="t",
2038
1115
access="readwrite")
2039
1116
def ApprovalDuration_dbus_property(self, value=None):
2040
1117
if value is None: # get
2041
return dbus.UInt64(self.approval_duration.total_seconds()
2042
* 1000)
1118
return dbus.UInt64(_timedelta_to_milliseconds(
1119
self.approval_duration))
2043
1120
self.approval_duration = datetime.timedelta(0, 0, 0, value)
2044
1121
2045
1122
# Name - property
2046
@dbus_annotations(
2047
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2048
1123
@dbus_service_property(_interface, signature="s", access="read")
2049
1124
def Name_dbus_property(self):
2050
1125
return dbus.String(self.name)
2051
2052
# KeyID - property
2053
@dbus_annotations(
2054
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2055
@dbus_service_property(_interface, signature="s", access="read")
2056
def KeyID_dbus_property(self):
2057
return dbus.String(self.key_id)
2058
1126
2059
1127
# Fingerprint - property
2060
@dbus_annotations(
2061
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2062
1128
@dbus_service_property(_interface, signature="s", access="read")
2063
1129
def Fingerprint_dbus_property(self):
2064
1130
return dbus.String(self.fingerprint)
2065
1131
2066
1132
# Host - property
2067
@dbus_service_property(_interface,
2068
signature="s",
1133
@dbus_service_property(_interface, signature="s",
2069
1134
access="readwrite")
2070
1135
def Host_dbus_property(self, value=None):
2071
1136
if value is None: # get
2072
1137
return dbus.String(self.host)
2073
self.host = str(value)
2074
1138
self.host = value
1139
2075
1140
# Created - property
2076
@dbus_annotations(
2077
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2078
1141
@dbus_service_property(_interface, signature="s", access="read")
2079
1142
def Created_dbus_property(self):
2080
return datetime_to_dbus(self.created)
2081
1143
return dbus.String(datetime_to_dbus(self.created))
1144
2082
1145
# LastEnabled - property
2083
1146
@dbus_service_property(_interface, signature="s", access="read")
2084
1147
def LastEnabled_dbus_property(self):
2085
1148
return datetime_to_dbus(self.last_enabled)
2086
1149
2087
1150
# Enabled - property
2088
@dbus_service_property(_interface,
2089
signature="b",
1151
@dbus_service_property(_interface, signature="b",
2090
1152
access="readwrite")
2091
1153
def Enabled_dbus_property(self, value=None):
2092
1154
if value is None: # get
2095
1157
self.enable()
2096
1158
else:
2097
1159
self.disable()
2098
1160
2099
1161
# LastCheckedOK - property
2100
@dbus_service_property(_interface,
2101
signature="s",
1162
@dbus_service_property(_interface, signature="s",
2102
1163
access="readwrite")
2103
1164
def LastCheckedOK_dbus_property(self, value=None):
2104
1165
if value is not None:
2105
1166
self.checked_ok()
2106
1167
return
2107
1168
return datetime_to_dbus(self.last_checked_ok)
2108
2109
# LastCheckerStatus - property
2110
@dbus_service_property(_interface, signature="n", access="read")
2111
def LastCheckerStatus_dbus_property(self):
2112
return dbus.Int16(self.last_checker_status)
2113
1169
2114
1170
# Expires - property
2115
1171
@dbus_service_property(_interface, signature="s", access="read")
2116
1172
def Expires_dbus_property(self):
2117
1173
return datetime_to_dbus(self.expires)
2118
1174
2119
1175
# LastApprovalRequest - property
2120
1176
@dbus_service_property(_interface, signature="s", access="read")
2121
1177
def LastApprovalRequest_dbus_property(self):
2122
1178
return datetime_to_dbus(self.last_approval_request)
2123
1179
2124
1180
# Timeout - property
2125
@dbus_service_property(_interface,
2126
signature="t",
1181
@dbus_service_property(_interface, signature="t",
2127
1182
access="readwrite")
2128
1183
def Timeout_dbus_property(self, value=None):
2129
1184
if value is None: # get
2130
return dbus.UInt64(self.timeout.total_seconds() * 1000)
2131
old_timeout = self.timeout
1185
return dbus.UInt64(self.timeout_milliseconds())
2132
1186
self.timeout = datetime.timedelta(0, 0, 0, value)
2133
# Reschedule disabling
2134
if self.enabled:
2135
now = datetime.datetime.utcnow()
2136
self.expires += self.timeout - old_timeout
2137
if self.expires <= now:
2138
# The timeout has passed
2139
self.disable()
2140
else:
2141
if (getattr(self, "disable_initiator_tag", None)
2142
is None):
2143
return
2144
GLib.source_remove(self.disable_initiator_tag)
2145
self.disable_initiator_tag = GLib.timeout_add(
2146
int((self.expires - now).total_seconds() * 1000),
2147
self.disable)
2148
1187
if getattr(self, "disable_initiator_tag", None) is None:
1188
return
1189
# Reschedule timeout
1190
gobject.source_remove(self.disable_initiator_tag)
1191
self.disable_initiator_tag = None
1192
self.expires = None
1193
time_to_die = _timedelta_to_milliseconds((self
1194
.last_checked_ok
1195
+ self.timeout)
1196
- datetime.datetime
1197
.utcnow())
1198
if time_to_die <= 0:
1199
# The timeout has passed
1200
self.disable()
1201
else:
1202
self.expires = (datetime.datetime.utcnow()
1203
+ datetime.timedelta(milliseconds =
1204
time_to_die))
1205
self.disable_initiator_tag = (gobject.timeout_add
1206
(time_to_die, self.disable))
1207
2149
1208
# ExtendedTimeout - property
2150
@dbus_service_property(_interface,
2151
signature="t",
1209
@dbus_service_property(_interface, signature="t",
2152
1210
access="readwrite")
2153
1211
def ExtendedTimeout_dbus_property(self, value=None):
2154
1212
if value is None: # get
2155
return dbus.UInt64(self.extended_timeout.total_seconds()
2156
* 1000)
1213
return dbus.UInt64(self.extended_timeout_milliseconds())
2157
1214
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
2158
1215
2159
1216
# Interval - property
2160
@dbus_service_property(_interface,
2161
signature="t",
1217
@dbus_service_property(_interface, signature="t",
2162
1218
access="readwrite")
2163
1219
def Interval_dbus_property(self, value=None):
2164
1220
if value is None: # get
2165
return dbus.UInt64(self.interval.total_seconds() * 1000)
1221
return dbus.UInt64(self.interval_milliseconds())
2166
1222
self.interval = datetime.timedelta(0, 0, 0, value)
2167
1223
if getattr(self, "checker_initiator_tag", None) is None:
2168
1224
return
2169
if self.enabled:
2170
# Reschedule checker run
2171
GLib.source_remove(self.checker_initiator_tag)
2172
self.checker_initiator_tag = GLib.timeout_add(
2173
value, self.start_checker)
2174
self.start_checker() # Start one now, too
2175
1225
# Reschedule checker run
1226
gobject.source_remove(self.checker_initiator_tag)
1227
self.checker_initiator_tag = (gobject.timeout_add
1228
(value, self.start_checker))
1229
self.start_checker() # Start one now, too
1230
2176
1231
# Checker - property
2177
@dbus_service_property(_interface,
2178
signature="s",
1232
@dbus_service_property(_interface, signature="s",
2179
1233
access="readwrite")
2180
1234
def Checker_dbus_property(self, value=None):
2181
1235
if value is None: # get
2182
1236
return dbus.String(self.checker_command)
2183
self.checker_command = str(value)
2184
1237
self.checker_command = value
1238
2185
1239
# CheckerRunning - property
2186
@dbus_service_property(_interface,
2187
signature="b",
1240
@dbus_service_property(_interface, signature="b",
2188
1241
access="readwrite")
2189
1242
def CheckerRunning_dbus_property(self, value=None):
2190
1243
if value is None: # get
2193
1246
self.start_checker()
2194
1247
else:
2195
1248
self.stop_checker()
2196
1249
2197
1250
# ObjectPath - property
2198
@dbus_annotations(
2199
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
2200
"org.freedesktop.DBus.Deprecated": "true"})
2201
1251
@dbus_service_property(_interface, signature="o", access="read")
2202
1252
def ObjectPath_dbus_property(self):
2203
return self.dbus_object_path # is already a dbus.ObjectPath
2204
1253
return self.dbus_object_path # is already a dbus.ObjectPath
1254
2205
1255
# Secret = property
2206
@dbus_annotations(
2207
{"org.freedesktop.DBus.Property.EmitsChangedSignal":
2208
"invalidates"})
2209
@dbus_service_property(_interface,
2210
signature="ay",
2211
access="write",
2212
byte_arrays=True)
1256
@dbus_service_property(_interface, signature="ay",
1257
access="write", byte_arrays=True)
2213
1258
def Secret_dbus_property(self, value):
2214
self.secret = bytes(value)
2215
1259
self.secret = str(value)
1260
2216
1261
del _interface
2217
1262
2218
1263
2219
class ProxyClient:
2220
def __init__(self, child_pipe, key_id, fpr, address):
1264
class ProxyClient(object):
1265
def __init__(self, child_pipe, fpr, address):
2221
1266
self._pipe = child_pipe
2222
self._pipe.send(('init', key_id, fpr, address))
1267
self._pipe.send(('init', fpr, address))
2223
1268
if not self._pipe.recv():
2224
raise KeyError(key_id or fpr)
2225
1269
raise KeyError()
1270
2226
1271
def __getattribute__(self, name):
2227
if name == '_pipe':
1272
if(name == '_pipe'):
2228
1273
return super(ProxyClient, self).__getattribute__(name)
2229
1274
self._pipe.send(('getattr', name))
2230
1275
data = self._pipe.recv()
2231
1276
if data[0] == 'data':
2232
1277
return data[1]
2233
1278
if data[0] == 'function':
2234
2235
1279
def func(*args, **kwargs):
2236
1280
self._pipe.send(('funcall', name, args, kwargs))
2237
1281
return self._pipe.recv()[1]
2238
2239
1282
return func
2240
1283
2241
1284
def __setattr__(self, name, value):
2242
if name == '_pipe':
1285
if(name == '_pipe'):
2243
1286
return super(ProxyClient, self).__setattr__(name, value)
2244
1287
self._pipe.send(('setattr', name, value))
2245
1288
1289
class ClientDBusTransitional(ClientDBus):
1290
__metaclass__ = AlternateDBusNamesMetaclass
2246
1291
2247
1292
class ClientHandler(socketserver.BaseRequestHandler, object):
2248
1293
"""A class to handle client connections.
2249
1294
2250
1295
Instantiated once for each connection to handle it.
2251
1296
Note: This will run in its own forked process."""
2252
1297
2253
1298
def handle(self):
2254
1299
with contextlib.closing(self.server.child_pipe) as child_pipe:
2255
1300
logger.info("TCP connection from: %s",
2256
str(self.client_address))
1301
unicode(self.client_address))
2257
1302
logger.debug("Pipe FD: %d",
2258
1303
self.server.child_pipe.fileno())
2259
2260
session = gnutls.ClientSession(self.request)
2261
2262
# priority = ':'.join(("NONE", "+VERS-TLS1.1",
2263
# "+AES-256-CBC", "+SHA1",
2264
# "+COMP-NULL", "+CTYPE-OPENPGP",
2265
# "+DHE-DSS"))
1304
1305
session = (gnutls.connection
1306
.ClientSession(self.request,
1307
gnutls.connection
1308
.X509Credentials()))
1309
1310
# Note: gnutls.connection.X509Credentials is really a
1311
# generic GnuTLS certificate credentials object so long as
1312
# no X.509 keys are added to it. Therefore, we can use it
1313
# here despite using OpenPGP certificates.
1314
1315
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1316
# "+AES-256-CBC", "+SHA1",
1317
# "+COMP-NULL", "+CTYPE-OPENPGP",
1318
# "+DHE-DSS"))
2266
1319
# Use a fallback default, since this MUST be set.
2267
1320
priority = self.server.gnutls_priority
2268
1321
if priority is None:
2269
1322
priority = "NORMAL"
2270
gnutls.priority_set_direct(session._c_object,
2271
priority.encode("utf-8"),
2272
None)
2273
1323
(gnutls.library.functions
1324
.gnutls_priority_set_direct(session._c_object,
1325
priority, None))
1326
2274
1327
# Start communication using the Mandos protocol
2275
1328
# Get protocol number
2276
1329
line = self.request.makefile().readline()
2277
1330
logger.debug("Protocol version: %r", line)
2278
1331
try:
2279
1332
if int(line.strip().split()[0]) > 1:
2280
raise RuntimeError(line)
1333
raise RuntimeError
2281
1334
except (ValueError, IndexError, RuntimeError) as error:
2282
1335
logger.error("Unknown protocol version: %s", error)
2283
1336
return
2284
1337
2285
1338
# Start GnuTLS connection
2286
1339
try:
2287
1340
session.handshake()
2288
except gnutls.Error as error:
1341
except gnutls.errors.GNUTLSError as error:
2289
1342
logger.warning("Handshake failed: %s", error)
2290
1343
# Do not run session.bye() here: the session is not
2291
1344
# established. Just abandon the request.
2292
1345
return
2293
1346
logger.debug("Handshake succeeded")
2294
1347
2295
1348
approval_required = False
2296
1349
try:
2297
if gnutls.has_rawpk:
2298
fpr = b""
2299
try:
2300
key_id = self.key_id(
2301
self.peer_certificate(session))
2302
except (TypeError, gnutls.Error) as error:
2303
logger.warning("Bad certificate: %s", error)
2304
return
2305
logger.debug("Key ID: %s", key_id)
2306
2307
else:
2308
key_id = b""
2309
try:
2310
fpr = self.fingerprint(
2311
self.peer_certificate(session))
2312
except (TypeError, gnutls.Error) as error:
2313
logger.warning("Bad certificate: %s", error)
2314
return
2315
logger.debug("Fingerprint: %s", fpr)
2316
2317
try:
2318
client = ProxyClient(child_pipe, key_id, fpr,
1350
try:
1351
fpr = self.fingerprint(self.peer_certificate
1352
(session))
1353
except (TypeError,
1354
gnutls.errors.GNUTLSError) as error:
1355
logger.warning("Bad certificate: %s", error)
1356
return
1357
logger.debug("Fingerprint: %s", fpr)
1358
1359
try:
1360
client = ProxyClient(child_pipe, fpr,
2319
1361
self.client_address)
2320
1362
except KeyError:
2321
1363
return
2322
1364
2323
1365
if client.approval_delay:
2324
1366
delay = client.approval_delay
2325
1367
client.approvals_pending += 1
2326
1368
approval_required = True
2327
1369
2328
1370
while True:
2329
1371
if not client.enabled:
2330
1372
logger.info("Client %s is disabled",
2331
client.name)
1373
client.name)
2332
1374
if self.server.use_dbus:
2333
1375
# Emit D-Bus signal
2334
1376
client.Rejected("Disabled")
2335
1377
return
2336
2337
if client.approved or not client.approval_delay:
2338
# We are approved or approval is disabled
1378
1379
if client._approved or not client.approval_delay:
1380
#We are approved or approval is disabled
2339
1381
break
2340
elif client.approved is None:
1382
elif client._approved is None:
2341
1383
logger.info("Client %s needs approval",
2342
1384
client.name)
2343
1385
if self.server.use_dbus:
2344
1386
# Emit D-Bus signal
2345
1387
client.NeedApproval(
2346
client.approval_delay.total_seconds()
2347
* 1000, client.approved_by_default)
1388
client.approval_delay_milliseconds(),
1389
client.approved_by_default)
2348
1390
else:
2349
1391
logger.warning("Client %s was not approved",
2350
1392
client.name)
2352
1394
# Emit D-Bus signal
2353
1395
client.Rejected("Denied")
2354
1396
return
2355
2356
# wait until timeout or approved
1397
1398
#wait until timeout or approved
2357
1399
time = datetime.datetime.now()
2358
1400
client.changedstate.acquire()
2359
client.changedstate.wait(delay.total_seconds())
1401
(client.changedstate.wait
1402
(float(client._timedelta_to_milliseconds(delay)
1403
/ 1000)))
2360
1404
client.changedstate.release()
2361
1405
time2 = datetime.datetime.now()
2362
1406
if (time2 - time) >= delay:
2372
1416
break
2373
1417
else:
2374
1418
delay -= time2 - time
2375
2376
try:
2377
session.send(client.secret)
2378
except gnutls.Error as error:
2379
logger.warning("gnutls send failed",
2380
exc_info=error)
2381
return
2382
1419
1420
sent_size = 0
1421
while sent_size < len(client.secret):
1422
try:
1423
sent = session.send(client.secret[sent_size:])
1424
except gnutls.errors.GNUTLSError as error:
1425
logger.warning("gnutls send failed")
1426
return
1427
logger.debug("Sent: %d, remaining: %d",
1428
sent, len(client.secret)
1429
- (sent_size + sent))
1430
sent_size += sent
1431
2383
1432
logger.info("Sending secret to %s", client.name)
2384
1433
# bump the timeout using extended_timeout
2385
client.bump_timeout(client.extended_timeout)
1434
client.checked_ok(client.extended_timeout)
2386
1435
if self.server.use_dbus:
2387
1436
# Emit D-Bus signal
2388
1437
client.GotSecret()
2389
1438
2390
1439
finally:
2391
1440
if approval_required:
2392
1441
client.approvals_pending -= 1
2393
1442
try:
2394
1443
session.bye()
2395
except gnutls.Error as error:
2396
logger.warning("GnuTLS bye failed",
2397
exc_info=error)
2398
1444
except gnutls.errors.GNUTLSError as error:
1445
logger.warning("GnuTLS bye failed")
1446
2399
1447
@staticmethod
2400
1448
def peer_certificate(session):
2401
"Return the peer's certificate as a bytestring"
2402
try:
2403
cert_type = gnutls.certificate_type_get2(session._c_object,
2404
gnutls.CTYPE_PEERS)
2405
except AttributeError:
2406
cert_type = gnutls.certificate_type_get(session._c_object)
2407
if gnutls.has_rawpk:
2408
valid_cert_types = frozenset((gnutls.CRT_RAWPK,))
2409
else:
2410
valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))
2411
# If not a valid certificate type...
2412
if cert_type not in valid_cert_types:
2413
logger.info("Cert type %r not in %r", cert_type,
2414
valid_cert_types)
2415
# ...return invalid data
2416
return b""
1449
"Return the peer's OpenPGP certificate as a bytestring"
1450
# If not an OpenPGP certificate...
1451
if (gnutls.library.functions
1452
.gnutls_certificate_type_get(session._c_object)
1453
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1454
# ...do the normal thing
1455
return session.peer_certificate
2417
1456
list_size = ctypes.c_uint(1)
2418
cert_list = (gnutls.certificate_get_peers
1457
cert_list = (gnutls.library.functions
1458
.gnutls_certificate_get_peers
2419
1459
(session._c_object, ctypes.byref(list_size)))
2420
1460
if not bool(cert_list) and list_size.value != 0:
2421
raise gnutls.Error("error getting peer certificate")
1461
raise gnutls.errors.GNUTLSError("error getting peer"
1462
" certificate")
2422
1463
if list_size.value == 0:
2423
1464
return None
2424
1465
cert = cert_list[0]
2425
1466
return ctypes.string_at(cert.data, cert.size)
2426
2427
@staticmethod
2428
def key_id(certificate):
2429
"Convert a certificate bytestring to a hexdigit key ID"
2430
# New GnuTLS "datum" with the public key
2431
datum = gnutls.datum_t(
2432
ctypes.cast(ctypes.c_char_p(certificate),
2433
ctypes.POINTER(ctypes.c_ubyte)),
2434
ctypes.c_uint(len(certificate)))
2435
# XXX all these need to be created in the gnutls "module"
2436
# New empty GnuTLS certificate
2437
pubkey = gnutls.pubkey_t()
2438
gnutls.pubkey_init(ctypes.byref(pubkey))
2439
# Import the raw public key into the certificate
2440
gnutls.pubkey_import(pubkey,
2441
ctypes.byref(datum),
2442
gnutls.X509_FMT_DER)
2443
# New buffer for the key ID
2444
buf = ctypes.create_string_buffer(32)
2445
buf_len = ctypes.c_size_t(len(buf))
2446
# Get the key ID from the raw public key into the buffer
2447
gnutls.pubkey_get_key_id(pubkey,
2448
gnutls.KEYID_USE_SHA256,
2449
ctypes.cast(ctypes.byref(buf),
2450
ctypes.POINTER(ctypes.c_ubyte)),
2451
ctypes.byref(buf_len))
2452
# Deinit the certificate
2453
gnutls.pubkey_deinit(pubkey)
2454
2455
# Convert the buffer to a Python bytestring
2456
key_id = ctypes.string_at(buf, buf_len.value)
2457
# Convert the bytestring to hexadecimal notation
2458
hex_key_id = binascii.hexlify(key_id).upper()
2459
return hex_key_id
2460
1467
2461
1468
@staticmethod
2462
1469
def fingerprint(openpgp):
2463
1470
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
2464
1471
# New GnuTLS "datum" with the OpenPGP public key
2465
datum = gnutls.datum_t(
2466
ctypes.cast(ctypes.c_char_p(openpgp),
2467
ctypes.POINTER(ctypes.c_ubyte)),
2468
ctypes.c_uint(len(openpgp)))
1472
datum = (gnutls.library.types
1473
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1474
ctypes.POINTER
1475
(ctypes.c_ubyte)),
1476
ctypes.c_uint(len(openpgp))))
2469
1477
# New empty GnuTLS certificate
2470
crt = gnutls.openpgp_crt_t()
2471
gnutls.openpgp_crt_init(ctypes.byref(crt))
1478
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1479
(gnutls.library.functions
1480
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
2472
1481
# Import the OpenPGP public key into the certificate
2473
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2474
gnutls.OPENPGP_FMT_RAW)
1482
(gnutls.library.functions
1483
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1484
gnutls.library.constants
1485
.GNUTLS_OPENPGP_FMT_RAW))
2475
1486
# Verify the self signature in the key
2476
1487
crtverify = ctypes.c_uint()
2477
gnutls.openpgp_crt_verify_self(crt, 0,
2478
ctypes.byref(crtverify))
1488
(gnutls.library.functions
1489
.gnutls_openpgp_crt_verify_self(crt, 0,
1490
ctypes.byref(crtverify)))
2479
1491
if crtverify.value != 0:
2480
gnutls.openpgp_crt_deinit(crt)
2481
raise gnutls.CertificateSecurityError(code
2482
=crtverify.value)
1492
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1493
raise (gnutls.errors.CertificateSecurityError
1494
("Verify failed"))
2483
1495
# New buffer for the fingerprint
2484
1496
buf = ctypes.create_string_buffer(20)
2485
1497
buf_len = ctypes.c_size_t()
2486
1498
# Get the fingerprint from the certificate into the buffer
2487
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2488
ctypes.byref(buf_len))
1499
(gnutls.library.functions
1500
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1501
ctypes.byref(buf_len)))
2489
1502
# Deinit the certificate
2490
gnutls.openpgp_crt_deinit(crt)
1503
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2491
1504
# Convert the buffer to a Python bytestring
2492
1505
fpr = ctypes.string_at(buf, buf_len.value)
2493
1506
# Convert the bytestring to hexadecimal notation
2494
hex_fpr = binascii.hexlify(fpr).upper()
1507
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
2495
1508
return hex_fpr
2496
1509
2497
1510
2498
class MultiprocessingMixIn:
1511
class MultiprocessingMixIn(object):
2499
1512
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2500
2501
1513
def sub_process_main(self, request, address):
2502
1514
try:
2503
1515
self.finish_request(request, address)
2504
except Exception:
1516
except:
2505
1517
self.handle_error(request, address)
2506
1518
self.close_request(request)
2507
1519
2508
1520
def process_request(self, request, address):
2509
1521
"""Start a new process to process the request."""
2510
proc = multiprocessing.Process(target=self.sub_process_main,
2511
args=(request, address))
1522
proc = multiprocessing.Process(target = self.sub_process_main,
1523
args = (request,
1524
address))
2512
1525
proc.start()
2513
1526
return proc
2514
1527
2515
1528
2516
class MultiprocessingMixInWithPipe(MultiprocessingMixIn):
1529
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
2517
1530
""" adds a pipe to the MixIn """
2518
2519
1531
def process_request(self, request, client_address):
2520
1532
"""Overrides and wraps the original process_request().
2521
1533
2522
1534
This function creates a new pipe in self.pipe
2523
1535
"""
2524
1536
parent_pipe, self.child_pipe = multiprocessing.Pipe()
2525
1537
2526
1538
proc = MultiprocessingMixIn.process_request(self, request,
2527
1539
client_address)
2528
1540
self.child_pipe.close()
2529
1541
self.add_pipe(parent_pipe, proc)
2530
1542
2531
1543
def add_pipe(self, parent_pipe, proc):
2532
1544
"""Dummy function; override as necessary"""
2533
raise NotImplementedError()
1545
raise NotImplementedError
2534
1546
2535
1547
2536
1548
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
2537
socketserver.TCPServer):
1549
socketserver.TCPServer, object):
2538
1550
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
2539
1551
2540
1552
Attributes:
2541
1553
enabled: Boolean; whether this server is activated yet
2542
1554
interface: None or a network interface name (string)
2543
1555
use_ipv6: Boolean; to use IPv6 or not
2544
1556
"""
2545
2546
1557
def __init__(self, server_address, RequestHandlerClass,
2547
interface=None,
2548
use_ipv6=True,
2549
socketfd=None):
2550
"""If socketfd is set, use that file descriptor instead of
2551
creating a new one with socket.socket().
2552
"""
1558
interface=None, use_ipv6=True):
2553
1559
self.interface = interface
2554
1560
if use_ipv6:
2555
1561
self.address_family = socket.AF_INET6
2556
if socketfd is not None:
2557
# Save the file descriptor
2558
self.socketfd = socketfd
2559
# Save the original socket.socket() function
2560
self.socket_socket = socket.socket
2561
2562
# To implement --socket, we monkey patch socket.socket.
2563
#
2564
# (When socketserver.TCPServer is a new-style class, we
2565
# could make self.socket into a property instead of monkey
2566
# patching socket.socket.)
2567
#
2568
# Create a one-time-only replacement for socket.socket()
2569
@functools.wraps(socket.socket)
2570
def socket_wrapper(*args, **kwargs):
2571
# Restore original function so subsequent calls are
2572
# not affected.
2573
socket.socket = self.socket_socket
2574
del self.socket_socket
2575
# This time only, return a new socket object from the
2576
# saved file descriptor.
2577
return socket.fromfd(self.socketfd, *args, **kwargs)
2578
# Replace socket.socket() function with wrapper
2579
socket.socket = socket_wrapper
2580
# The socketserver.TCPServer.__init__ will call
2581
# socket.socket(), which might be our replacement,
2582
# socket_wrapper(), if socketfd was set.
2583
1562
socketserver.TCPServer.__init__(self, server_address,
2584
1563
RequestHandlerClass)
2585
2586
1564
def server_bind(self):
2587
1565
"""This overrides the normal server_bind() function
2588
1566
to bind to an interface if one was specified, and also NOT to
2589
1567
bind to an address or port if they were not specified."""
2590
global SO_BINDTODEVICE
2591
1568
if self.interface is not None:
2592
1569
if SO_BINDTODEVICE is None:
2593
# Fall back to a hard-coded value which seems to be
2594
# common enough.
2595
logger.warning("SO_BINDTODEVICE not found, trying 25")
2596
SO_BINDTODEVICE = 25
2597
try:
2598
self.socket.setsockopt(
2599
socket.SOL_SOCKET, SO_BINDTODEVICE,
2600
(self.interface + "\0").encode("utf-8"))
2601
except socket.error as error:
2602
if error.errno == errno.EPERM:
2603
logger.error("No permission to bind to"
2604
" interface %s", self.interface)
2605
elif error.errno == errno.ENOPROTOOPT:
2606
logger.error("SO_BINDTODEVICE not available;"
2607
" cannot bind to interface %s",
2608
self.interface)
2609
elif error.errno == errno.ENODEV:
2610
logger.error("Interface %s does not exist,"
2611
" cannot bind", self.interface)
2612
else:
2613
raise
1570
logger.error("SO_BINDTODEVICE does not exist;"
1571
" cannot bind to interface %s",
1572
self.interface)
1573
else:
1574
try:
1575
self.socket.setsockopt(socket.SOL_SOCKET,
1576
SO_BINDTODEVICE,
1577
str(self.interface
1578
+ '\0'))
1579
except socket.error as error:
1580
if error[0] == errno.EPERM:
1581
logger.error("No permission to"
1582
" bind to interface %s",
1583
self.interface)
1584
elif error[0] == errno.ENOPROTOOPT:
1585
logger.error("SO_BINDTODEVICE not available;"
1586
" cannot bind to interface %s",
1587
self.interface)
1588
else:
1589
raise
2614
1590
# Only bind(2) the socket if we really need to.
2615
1591
if self.server_address[0] or self.server_address[1]:
2616
if self.server_address[1]:
2617
self.allow_reuse_address = True
2618
1592
if not self.server_address[0]:
2619
1593
if self.address_family == socket.AF_INET6:
2620
any_address = "::" # in6addr_any
1594
any_address = "::" # in6addr_any
2621
1595
else:
2622
any_address = "0.0.0.0" # INADDR_ANY
1596
any_address = socket.INADDR_ANY
2623
1597
self.server_address = (any_address,
2624
1598
self.server_address[1])
2625
1599
elif not self.server_address[1]:
2626
self.server_address = (self.server_address[0], 0)
1600
self.server_address = (self.server_address[0],
1601
0)
2627
1602
# if self.interface:
2628
1603
# self.server_address = (self.server_address[0],
2629
1604
# 0, # port
2635
1610
2636
1611
class MandosServer(IPv6_TCPServer):
2637
1612
"""Mandos server.
2638
1613
2639
1614
Attributes:
2640
1615
clients: set of Client objects
2641
1616
gnutls_priority GnuTLS priority string
2642
1617
use_dbus: Boolean; to emit D-Bus signals or not
2643
2644
Assumes a GLib.MainLoop event loop.
1618
1619
Assumes a gobject.MainLoop event loop.
2645
1620
"""
2646
2647
1621
def __init__(self, server_address, RequestHandlerClass,
2648
interface=None,
2649
use_ipv6=True,
2650
clients=None,
2651
gnutls_priority=None,
2652
use_dbus=True,
2653
socketfd=None):
1622
interface=None, use_ipv6=True, clients=None,
1623
gnutls_priority=None, use_dbus=True):
2654
1624
self.enabled = False
2655
1625
self.clients = clients
2656
1626
if self.clients is None:
2657
self.clients = {}
1627
self.clients = set()
2658
1628
self.use_dbus = use_dbus
2659
1629
self.gnutls_priority = gnutls_priority
2660
1630
IPv6_TCPServer.__init__(self, server_address,
2661
1631
RequestHandlerClass,
2662
interface=interface,
2663
use_ipv6=use_ipv6,
2664
socketfd=socketfd)
2665
1632
interface = interface,
1633
use_ipv6 = use_ipv6)
2666
1634
def server_activate(self):
2667
1635
if self.enabled:
2668
1636
return socketserver.TCPServer.server_activate(self)
2669
1637
2670
1638
def enable(self):
2671
1639
self.enabled = True
2672
1640
2673
1641
def add_pipe(self, parent_pipe, proc):
2674
1642
# Call "handle_ipc" for both data and EOF events
2675
GLib.io_add_watch(
2676
parent_pipe.fileno(),
2677
GLib.IO_IN | GLib.IO_HUP,
2678
functools.partial(self.handle_ipc,
2679
parent_pipe=parent_pipe,
2680
proc=proc))
2681
2682
def handle_ipc(self, source, condition,
2683
parent_pipe=None,
2684
proc=None,
2685
client_object=None):
1643
gobject.io_add_watch(parent_pipe.fileno(),
1644
gobject.IO_IN | gobject.IO_HUP,
1645
functools.partial(self.handle_ipc,
1646
parent_pipe =
1647
parent_pipe,
1648
proc = proc))
1649
1650
def handle_ipc(self, source, condition, parent_pipe=None,
1651
proc = None, client_object=None):
1652
condition_names = {
1653
gobject.IO_IN: "IN", # There is data to read.
1654
gobject.IO_OUT: "OUT", # Data can be written (without
1655
# blocking).
1656
gobject.IO_PRI: "PRI", # There is urgent data to read.
1657
gobject.IO_ERR: "ERR", # Error condition.
1658
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1659
# broken, usually for pipes and
1660
# sockets).
1661
}
1662
conditions_string = ' | '.join(name
1663
for cond, name in
1664
condition_names.iteritems()
1665
if cond & condition)
2686
1666
# error, or the other end of multiprocessing.Pipe has closed
2687
if condition & (GLib.IO_ERR | GLib.IO_HUP):
1667
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
2688
1668
# Wait for other process to exit
2689
1669
proc.join()
2690
1670
return False
2691
1671
2692
1672
# Read a request from the child
2693
1673
request = parent_pipe.recv()
2694
1674
command = request[0]
2695
1675
2696
1676
if command == 'init':
2697
key_id = request[1].decode("ascii")
2698
fpr = request[2].decode("ascii")
2699
address = request[3]
2700
2701
for c in self.clients.values():
2702
if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":
2703
continue
2704
if key_id and c.key_id == key_id:
2705
client = c
2706
break
2707
if fpr and c.fingerprint == fpr:
1677
fpr = request[1]
1678
address = request[2]
1679
1680
for c in self.clients:
1681
if c.fingerprint == fpr:
2708
1682
client = c
2709
1683
break
2710
1684
else:
2711
logger.info("Client not found for key ID: %s, address"
2712
": %s", key_id or fpr, address)
1685
logger.info("Client not found for fingerprint: %s, ad"
1686
"dress: %s", fpr, address)
2713
1687
if self.use_dbus:
2714
1688
# Emit D-Bus signal
2715
mandos_dbus_service.ClientNotFound(key_id or fpr,
1689
mandos_dbus_service.ClientNotFound(fpr,
2716
1690
address[0])
2717
1691
parent_pipe.send(False)
2718
1692
return False
2719
2720
GLib.io_add_watch(
2721
parent_pipe.fileno(),
2722
GLib.IO_IN | GLib.IO_HUP,
2723
functools.partial(self.handle_ipc,
2724
parent_pipe=parent_pipe,
2725
proc=proc,
2726
client_object=client))
1693
1694
gobject.io_add_watch(parent_pipe.fileno(),
1695
gobject.IO_IN | gobject.IO_HUP,
1696
functools.partial(self.handle_ipc,
1697
parent_pipe =
1698
parent_pipe,
1699
proc = proc,
1700
client_object =
1701
client))
2727
1702
parent_pipe.send(True)
2728
1703
# remove the old hook in favor of the new above hook on
2729
1704
# same fileno
2732
1707
funcname = request[1]
2733
1708
args = request[2]
2734
1709
kwargs = request[3]
2735
1710
2736
1711
parent_pipe.send(('data', getattr(client_object,
2737
1712
funcname)(*args,
2738
**kwargs)))
2739
1713
**kwargs)))
1714
2740
1715
if command == 'getattr':
2741
1716
attrname = request[1]
2742
if isinstance(client_object.__getattribute__(attrname),
2743
collections.Callable):
2744
parent_pipe.send(('function', ))
1717
if callable(client_object.__getattribute__(attrname)):
1718
parent_pipe.send(('function',))
2745
1719
else:
2746
parent_pipe.send((
2747
'data', client_object.__getattribute__(attrname)))
2748
1720
parent_pipe.send(('data', client_object
1721
.__getattribute__(attrname)))
1722
2749
1723
if command == 'setattr':
2750
1724
attrname = request[1]
2751
1725
value = request[2]
2752
1726
setattr(client_object, attrname, value)
2753
1727
2754
1728
return True
2755
1729
2756
1730
2757
def rfc3339_duration_to_delta(duration):
2758
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2759
2760
>>> rfc3339_duration_to_delta("P7D")
2761
datetime.timedelta(7)
2762
>>> rfc3339_duration_to_delta("PT60S")
2763
datetime.timedelta(0, 60)
2764
>>> rfc3339_duration_to_delta("PT60M")
2765
datetime.timedelta(0, 3600)
2766
>>> rfc3339_duration_to_delta("PT24H")
2767
datetime.timedelta(1)
2768
>>> rfc3339_duration_to_delta("P1W")
2769
datetime.timedelta(7)
2770
>>> rfc3339_duration_to_delta("PT5M30S")
2771
datetime.timedelta(0, 330)
2772
>>> rfc3339_duration_to_delta("P1DT3M20S")
2773
datetime.timedelta(1, 200)
2774
"""
2775
2776
# Parsing an RFC 3339 duration with regular expressions is not
2777
# possible - there would have to be multiple places for the same
2778
# values, like seconds. The current code, while more esoteric, is
2779
# cleaner without depending on a parsing library. If Python had a
2780
# built-in library for parsing we would use it, but we'd like to
2781
# avoid excessive use of external libraries.
2782
2783
# New type for defining tokens, syntax, and semantics all-in-one
2784
Token = collections.namedtuple("Token", (
2785
"regexp", # To match token; if "value" is not None, must have
2786
# a "group" containing digits
2787
"value", # datetime.timedelta or None
2788
"followers")) # Tokens valid after this token
2789
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2790
# the "duration" ABNF definition in RFC 3339, Appendix A.
2791
token_end = Token(re.compile(r"$"), None, frozenset())
2792
token_second = Token(re.compile(r"(\d+)S"),
2793
datetime.timedelta(seconds=1),
2794
frozenset((token_end, )))
2795
token_minute = Token(re.compile(r"(\d+)M"),
2796
datetime.timedelta(minutes=1),
2797
frozenset((token_second, token_end)))
2798
token_hour = Token(re.compile(r"(\d+)H"),
2799
datetime.timedelta(hours=1),
2800
frozenset((token_minute, token_end)))
2801
token_time = Token(re.compile(r"T"),
2802
None,
2803
frozenset((token_hour, token_minute,
2804
token_second)))
2805
token_day = Token(re.compile(r"(\d+)D"),
2806
datetime.timedelta(days=1),
2807
frozenset((token_time, token_end)))
2808
token_month = Token(re.compile(r"(\d+)M"),
2809
datetime.timedelta(weeks=4),
2810
frozenset((token_day, token_end)))
2811
token_year = Token(re.compile(r"(\d+)Y"),
2812
datetime.timedelta(weeks=52),
2813
frozenset((token_month, token_end)))
2814
token_week = Token(re.compile(r"(\d+)W"),
2815
datetime.timedelta(weeks=1),
2816
frozenset((token_end, )))
2817
token_duration = Token(re.compile(r"P"), None,
2818
frozenset((token_year, token_month,
2819
token_day, token_time,
2820
token_week)))
2821
# Define starting values:
2822
# Value so far
2823
value = datetime.timedelta()
2824
found_token = None
2825
# Following valid tokens
2826
followers = frozenset((token_duration, ))
2827
# String left to parse
2828
s = duration
2829
# Loop until end token is found
2830
while found_token is not token_end:
2831
# Search for any currently valid tokens
2832
for token in followers:
2833
match = token.regexp.match(s)
2834
if match is not None:
2835
# Token found
2836
if token.value is not None:
2837
# Value found, parse digits
2838
factor = int(match.group(1), 10)
2839
# Add to value so far
2840
value += factor * token.value
2841
# Strip token from string
2842
s = token.regexp.sub("", s, 1)
2843
# Go to found token
2844
found_token = token
2845
# Set valid next tokens
2846
followers = found_token.followers
2847
break
2848
else:
2849
# No currently valid tokens were found
2850
raise ValueError("Invalid RFC 3339 duration: {!r}"
2851
.format(duration))
2852
# End token found
2853
return value
2854
2855
2856
1731
def string_to_delta(interval):
2857
1732
"""Parse a string and return a datetime.timedelta
2858
1733
2859
1734
>>> string_to_delta('7d')
2860
1735
datetime.timedelta(7)
2861
1736
>>> string_to_delta('60s')
2869
1744
>>> string_to_delta('5m 30s')
2870
1745
datetime.timedelta(0, 330)
2871
1746
"""
2872
2873
try:
2874
return rfc3339_duration_to_delta(interval)
2875
except ValueError:
2876
pass
2877
2878
1747
timevalue = datetime.timedelta(0)
2879
1748
for s in interval.split():
2880
1749
try:
2881
suffix = s[-1]
1750
suffix = unicode(s[-1])
2882
1751
value = int(s[:-1])
2883
1752
if suffix == "d":
2884
1753
delta = datetime.timedelta(value)
2891
1760
elif suffix == "w":
2892
1761
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
2893
1762
else:
2894
raise ValueError("Unknown suffix {!r}".format(suffix))
2895
except IndexError as e:
1763
raise ValueError("Unknown suffix %r" % suffix)
1764
except (ValueError, IndexError) as e:
2896
1765
raise ValueError(*(e.args))
2897
1766
timevalue += delta
2898
1767
return timevalue
2899
1768
2900
1769
2901
def daemon(nochdir=False, noclose=False):
1770
def if_nametoindex(interface):
1771
"""Call the C function if_nametoindex(), or equivalent
1772
1773
Note: This function cannot accept a unicode string."""
1774
global if_nametoindex
1775
try:
1776
if_nametoindex = (ctypes.cdll.LoadLibrary
1777
(ctypes.util.find_library("c"))
1778
.if_nametoindex)
1779
except (OSError, AttributeError):
1780
logger.warning("Doing if_nametoindex the hard way")
1781
def if_nametoindex(interface):
1782
"Get an interface index the hard way, i.e. using fcntl()"
1783
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1784
with contextlib.closing(socket.socket()) as s:
1785
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1786
struct.pack(str("16s16x"),
1787
interface))
1788
interface_index = struct.unpack(str("I"),
1789
ifreq[16:20])[0]
1790
return interface_index
1791
return if_nametoindex(interface)
1792
1793
1794
def daemon(nochdir = False, noclose = False):
2902
1795
"""See daemon(3). Standard BSD Unix function.
2903
1796
2904
1797
This should really exist as os.daemon, but it doesn't (yet)."""
2905
1798
if os.fork():
2906
1799
sys.exit()
2911
1804
sys.exit()
2912
1805
if not noclose:
2913
1806
# Close all standard open file descriptors
2914
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1807
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2915
1808
if not stat.S_ISCHR(os.fstat(null).st_mode):
2916
1809
raise OSError(errno.ENODEV,
2917
"{} not a character device"
2918
.format(os.devnull))
1810
"%s not a character device"
1811
% os.path.devnull)
2919
1812
os.dup2(null, sys.stdin.fileno())
2920
1813
os.dup2(null, sys.stdout.fileno())
2921
1814
os.dup2(null, sys.stderr.fileno())
2924
1817
2925
1818
2926
1819
def main():
2927
1820
2928
1821
##################################################################
2929
1822
# Parsing of options, both command line and config file
2930
1823
2931
1824
parser = argparse.ArgumentParser()
2932
1825
parser.add_argument("-v", "--version", action="version",
2933
version="%(prog)s {}".format(version),
1826
version = "%%(prog)s %s" % version,
2934
1827
help="show version number and exit")
2935
1828
parser.add_argument("-i", "--interface", metavar="IF",
2936
1829
help="Bind to interface IF")
2942
1835
help="Run self-test")
2943
1836
parser.add_argument("--debug", action="store_true",
2944
1837
help="Debug mode; run in foreground and log"
2945
" to terminal", default=None)
1838
" to terminal")
2946
1839
parser.add_argument("--debuglevel", metavar="LEVEL",
2947
1840
help="Debug level for stdout output")
2948
1841
parser.add_argument("--priority", help="GnuTLS"
2955
1848
" files")
2956
1849
parser.add_argument("--no-dbus", action="store_false",
2957
1850
dest="use_dbus", help="Do not provide D-Bus"
2958
" system bus interface", default=None)
1851
" system bus interface")
2959
1852
parser.add_argument("--no-ipv6", action="store_false",
2960
dest="use_ipv6", help="Do not use IPv6",
2961
default=None)
2962
parser.add_argument("--no-restore", action="store_false",
2963
dest="restore", help="Do not restore stored"
2964
" state", default=None)
2965
parser.add_argument("--socket", type=int,
2966
help="Specify a file descriptor to a network"
2967
" socket to use instead of creating one")
2968
parser.add_argument("--statedir", metavar="DIR",
2969
help="Directory to save/restore state in")
2970
parser.add_argument("--foreground", action="store_true",
2971
help="Run in foreground", default=None)
2972
parser.add_argument("--no-zeroconf", action="store_false",
2973
dest="zeroconf", help="Do not use Zeroconf",
2974
default=None)
2975
1853
dest="use_ipv6", help="Do not use IPv6")
2976
1854
options = parser.parse_args()
2977
1855
2978
1856
if options.check:
2979
1857
import doctest
2980
fail_count, test_count = doctest.testmod()
2981
sys.exit(os.EX_OK if fail_count == 0 else 1)
2982
1858
doctest.testmod()
1859
sys.exit()
1860
2983
1861
# Default values for config file for server-global settings
2984
if gnutls.has_rawpk:
2985
priority = ("SECURE128:!CTYPE-X.509:+CTYPE-RAWPK:!RSA"
2986
":!VERS-ALL:+VERS-TLS1.3:%PROFILE_ULTRA")
2987
else:
2988
priority = ("SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2989
":+SIGN-DSA-SHA256")
2990
server_defaults = {"interface": "",
2991
"address": "",
2992
"port": "",
2993
"debug": "False",
2994
"priority": priority,
2995
"servicename": "Mandos",
2996
"use_dbus": "True",
2997
"use_ipv6": "True",
2998
"debuglevel": "",
2999
"restore": "True",
3000
"socket": "",
3001
"statedir": "/var/lib/mandos",
3002
"foreground": "False",
3003
"zeroconf": "True",
3004
}
3005
del priority
3006
1862
server_defaults = { "interface": "",
1863
"address": "",
1864
"port": "",
1865
"debug": "False",
1866
"priority":
1867
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1868
"servicename": "Mandos",
1869
"use_dbus": "True",
1870
"use_ipv6": "True",
1871
"debuglevel": "",
1872
}
1873
3007
1874
# Parse config file for server-global settings
3008
server_config = configparser.ConfigParser(server_defaults)
1875
server_config = configparser.SafeConfigParser(server_defaults)
3009
1876
del server_defaults
3010
server_config.read(os.path.join(options.configdir, "mandos.conf"))
3011
# Convert the ConfigParser object to a dict
1877
server_config.read(os.path.join(options.configdir,
1878
"mandos.conf"))
1879
# Convert the SafeConfigParser object to a dict
3012
1880
server_settings = server_config.defaults()
3013
1881
# Use the appropriate methods on the non-string config options
3014
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3015
"foreground", "zeroconf"):
1882
for option in ("debug", "use_dbus", "use_ipv6"):
3016
1883
server_settings[option] = server_config.getboolean("DEFAULT",
3017
1884
option)
3018
1885
if server_settings["port"]:
3019
1886
server_settings["port"] = server_config.getint("DEFAULT",
3020
1887
"port")
3021
if server_settings["socket"]:
3022
server_settings["socket"] = server_config.getint("DEFAULT",
3023
"socket")
3024
# Later, stdin will, and stdout and stderr might, be dup'ed
3025
# over with an opened os.devnull. But we don't want this to
3026
# happen with a supplied network socket.
3027
if 0 <= server_settings["socket"] <= 2:
3028
server_settings["socket"] = os.dup(server_settings
3029
["socket"])
3030
1888
del server_config
3031
1889
3032
1890
# Override the settings from the config file with command line
3033
1891
# options, if set.
3034
1892
for option in ("interface", "address", "port", "debug",
3035
"priority", "servicename", "configdir", "use_dbus",
3036
"use_ipv6", "debuglevel", "restore", "statedir",
3037
"socket", "foreground", "zeroconf"):
1893
"priority", "servicename", "configdir",
1894
"use_dbus", "use_ipv6", "debuglevel"):
3038
1895
value = getattr(options, option)
3039
1896
if value is not None:
3040
1897
server_settings[option] = value
3041
1898
del options
3042
1899
# Force all strings to be unicode
3043
1900
for option in server_settings.keys():
3044
if isinstance(server_settings[option], bytes):
3045
server_settings[option] = (server_settings[option]
3046
.decode("utf-8"))
3047
# Force all boolean options to be boolean
3048
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3049
"foreground", "zeroconf"):
3050
server_settings[option] = bool(server_settings[option])
3051
# Debug implies foreground
3052
if server_settings["debug"]:
3053
server_settings["foreground"] = True
1901
if type(server_settings[option]) is str:
1902
server_settings[option] = unicode(server_settings[option])
3054
1903
# Now we have our good server settings in "server_settings"
3055
1904
3056
1905
##################################################################
3057
3058
if (not server_settings["zeroconf"]
3059
and not (server_settings["port"]
3060
or server_settings["socket"] != "")):
3061
parser.error("Needs port or socket to work without Zeroconf")
3062
1906
3063
1907
# For convenience
3064
1908
debug = server_settings["debug"]
3065
1909
debuglevel = server_settings["debuglevel"]
3066
1910
use_dbus = server_settings["use_dbus"]
3067
1911
use_ipv6 = server_settings["use_ipv6"]
3068
stored_state_path = os.path.join(server_settings["statedir"],
3069
stored_state_file)
3070
foreground = server_settings["foreground"]
3071
zeroconf = server_settings["zeroconf"]
3072
3073
if debug:
3074
initlogger(debug, logging.DEBUG)
3075
else:
3076
if not debuglevel:
3077
initlogger(debug)
3078
else:
3079
level = getattr(logging, debuglevel.upper())
3080
initlogger(debug, level)
3081
1912
3082
1913
if server_settings["servicename"] != "Mandos":
3083
syslogger.setFormatter(
3084
logging.Formatter('Mandos ({}) [%(process)d]:'
3085
' %(levelname)s: %(message)s'.format(
3086
server_settings["servicename"])))
3087
1914
syslogger.setFormatter(logging.Formatter
1915
('Mandos (%s) [%%(process)d]:'
1916
' %%(levelname)s: %%(message)s'
1917
% server_settings["servicename"]))
1918
3088
1919
# Parse config file with clients
3089
client_config = configparser.ConfigParser(Client.client_defaults)
1920
client_defaults = { "timeout": "5m",
1921
"extended_timeout": "15m",
1922
"interval": "2m",
1923
"checker": "fping -q -- %%(host)s",
1924
"host": "",
1925
"approval_delay": "0s",
1926
"approval_duration": "1s",
1927
}
1928
client_config = configparser.SafeConfigParser(client_defaults)
3090
1929
client_config.read(os.path.join(server_settings["configdir"],
3091
1930
"clients.conf"))
3092
1931
3093
1932
global mandos_dbus_service
3094
1933
mandos_dbus_service = None
3095
3096
socketfd = None
3097
if server_settings["socket"] != "":
3098
socketfd = server_settings["socket"]
3099
tcp_server = MandosServer(
3100
(server_settings["address"], server_settings["port"]),
3101
ClientHandler,
3102
interface=(server_settings["interface"] or None),
3103
use_ipv6=use_ipv6,
3104
gnutls_priority=server_settings["priority"],
3105
use_dbus=use_dbus,
3106
socketfd=socketfd)
3107
if not foreground:
3108
pidfilename = "/run/mandos.pid"
3109
if not os.path.isdir("/run/."):
3110
pidfilename = "/var/run/mandos.pid"
3111
pidfile = None
3112
try:
3113
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
3114
except IOError as e:
3115
logger.error("Could not open file %r", pidfilename,
3116
exc_info=e)
3117
3118
for name, group in (("_mandos", "_mandos"),
3119
("mandos", "mandos"),
3120
("nobody", "nogroup")):
3121
try:
3122
uid = pwd.getpwnam(name).pw_uid
3123
gid = pwd.getpwnam(group).pw_gid
3124
break
1934
1935
tcp_server = MandosServer((server_settings["address"],
1936
server_settings["port"]),
1937
ClientHandler,
1938
interface=(server_settings["interface"]
1939
or None),
1940
use_ipv6=use_ipv6,
1941
gnutls_priority=
1942
server_settings["priority"],
1943
use_dbus=use_dbus)
1944
if not debug:
1945
pidfilename = "/var/run/mandos.pid"
1946
try:
1947
pidfile = open(pidfilename, "w")
1948
except IOError:
1949
logger.error("Could not open file %r", pidfilename)
1950
1951
try:
1952
uid = pwd.getpwnam("_mandos").pw_uid
1953
gid = pwd.getpwnam("_mandos").pw_gid
1954
except KeyError:
1955
try:
1956
uid = pwd.getpwnam("mandos").pw_uid
1957
gid = pwd.getpwnam("mandos").pw_gid
3125
1958
except KeyError:
3126
continue
3127
else:
3128
uid = 65534
3129
gid = 65534
1959
try:
1960
uid = pwd.getpwnam("nobody").pw_uid
1961
gid = pwd.getpwnam("nobody").pw_gid
1962
except KeyError:
1963
uid = 65534
1964
gid = 65534
3130
1965
try:
3131
1966
os.setgid(gid)
3132
1967
os.setuid(uid)
3133
if debug:
3134
logger.debug("Did setuid/setgid to {}:{}".format(uid,
3135
gid))
3136
1968
except OSError as error:
3137
logger.warning("Failed to setuid/setgid to {}:{}: {}"
3138
.format(uid, gid, os.strerror(error.errno)))
3139
if error.errno != errno.EPERM:
3140
raise
3141
1969
if error[0] != errno.EPERM:
1970
raise error
1971
1972
if not debug and not debuglevel:
1973
syslogger.setLevel(logging.WARNING)
1974
console.setLevel(logging.WARNING)
1975
if debuglevel:
1976
level = getattr(logging, debuglevel.upper())
1977
syslogger.setLevel(level)
1978
console.setLevel(level)
1979
3142
1980
if debug:
3143
1981
# Enable all possible GnuTLS debugging
3144
1982
3145
1983
# "Use a log level over 10 to enable all debugging options."
3146
1984
# - GnuTLS manual
3147
gnutls.global_set_log_level(11)
3148
3149
@gnutls.log_func
1985
gnutls.library.functions.gnutls_global_set_log_level(11)
1986
1987
@gnutls.library.types.gnutls_log_func
3150
1988
def debug_gnutls(level, string):
3151
1989
logger.debug("GnuTLS: %s", string[:-1])
3152
3153
gnutls.global_set_log_function(debug_gnutls)
3154
1990
1991
(gnutls.library.functions
1992
.gnutls_global_set_log_function(debug_gnutls))
1993
3155
1994
# Redirect stdin so all checkers get /dev/null
3156
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1995
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
3157
1996
os.dup2(null, sys.stdin.fileno())
3158
1997
if null > 2:
3159
1998
os.close(null)
3160
1999
else:
2000
# No console logging
2001
logger.removeHandler(console)
2002
3161
2003
# Need to fork before connecting to D-Bus
3162
if not foreground:
2004
if not debug:
3163
2005
# Close all input and output, do double fork, etc.
3164
2006
daemon()
3165
3166
if gi.version_info < (3, 10, 2):
3167
# multiprocessing will use threads, so before we use GLib we
3168
# need to inform GLib that threads will be used.
3169
GLib.threads_init()
3170
2007
3171
2008
global main_loop
3172
2009
# From the Avahi example code
3173
DBusGMainLoop(set_as_default=True)
3174
main_loop = GLib.MainLoop()
2010
DBusGMainLoop(set_as_default=True )
2011
main_loop = gobject.MainLoop()
3175
2012
bus = dbus.SystemBus()
3176
2013
# End of Avahi example code
3177
2014
if use_dbus:
3178
2015
try:
3179
2016
bus_name = dbus.service.BusName("se.recompile.Mandos",
3180
bus,
3181
do_not_queue=True)
3182
old_bus_name = dbus.service.BusName(
3183
"se.bsnet.fukt.Mandos", bus,
3184
do_not_queue=True)
3185
except dbus.exceptions.DBusException as e:
3186
logger.error("Disabling D-Bus:", exc_info=e)
2017
bus, do_not_queue=True)
2018
old_bus_name = (dbus.service.BusName
2019
("se.bsnet.fukt.Mandos", bus,
2020
do_not_queue=True))
2021
except dbus.exceptions.NameExistsException as e:
2022
logger.error(unicode(e) + ", disabling D-Bus")
3187
2023
use_dbus = False
3188
2024
server_settings["use_dbus"] = False
3189
2025
tcp_server.use_dbus = False
3190
if zeroconf:
3191
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3192
service = AvahiServiceToSyslog(
3193
name=server_settings["servicename"],
3194
servicetype="_mandos._tcp",
3195
protocol=protocol,
3196
bus=bus)
3197
if server_settings["interface"]:
3198
service.interface = if_nametoindex(
3199
server_settings["interface"].encode("utf-8"))
3200
2026
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2027
service = AvahiService(name = server_settings["servicename"],
2028
servicetype = "_mandos._tcp",
2029
protocol = protocol, bus = bus)
2030
if server_settings["interface"]:
2031
service.interface = (if_nametoindex
2032
(str(server_settings["interface"])))
2033
3201
2034
global multiprocessing_manager
3202
2035
multiprocessing_manager = multiprocessing.Manager()
3203
2036
3204
2037
client_class = Client
3205
2038
if use_dbus:
3206
client_class = functools.partial(ClientDBus, bus=bus)
3207
3208
client_settings = Client.config_parser(client_config)
3209
old_client_settings = {}
3210
clients_data = {}
3211
3212
# This is used to redirect stdout and stderr for checker processes
3213
global wnull
3214
wnull = open(os.devnull, "w") # A writable /dev/null
3215
# Only used if server is running in foreground but not in debug
3216
# mode
3217
if debug or not foreground:
3218
wnull.close()
3219
3220
# Get client data and settings from last running state.
3221
if server_settings["restore"]:
3222
try:
3223
with open(stored_state_path, "rb") as stored_state:
3224
if sys.version_info.major == 2:
3225
clients_data, old_client_settings = pickle.load(
3226
stored_state)
3227
else:
3228
bytes_clients_data, bytes_old_client_settings = (
3229
pickle.load(stored_state, encoding="bytes"))
3230
# Fix bytes to strings
3231
# clients_data
3232
# .keys()
3233
clients_data = {(key.decode("utf-8")
3234
if isinstance(key, bytes)
3235
else key): value
3236
for key, value in
3237
bytes_clients_data.items()}
3238
del bytes_clients_data
3239
for key in clients_data:
3240
value = {(k.decode("utf-8")
3241
if isinstance(k, bytes) else k): v
3242
for k, v in
3243
clients_data[key].items()}
3244
clients_data[key] = value
3245
# .client_structure
3246
value["client_structure"] = [
3247
(s.decode("utf-8")
3248
if isinstance(s, bytes)
3249
else s) for s in
3250
value["client_structure"]]
3251
# .name & .host
3252
for k in ("name", "host"):
3253
if isinstance(value[k], bytes):
3254
value[k] = value[k].decode("utf-8")
3255
if "key_id" not in value:
3256
value["key_id"] = ""
3257
elif "fingerprint" not in value:
3258
value["fingerprint"] = ""
3259
# old_client_settings
3260
# .keys()
3261
old_client_settings = {
3262
(key.decode("utf-8")
3263
if isinstance(key, bytes)
3264
else key): value
3265
for key, value in
3266
bytes_old_client_settings.items()}
3267
del bytes_old_client_settings
3268
# .host
3269
for value in old_client_settings.values():
3270
if isinstance(value["host"], bytes):
3271
value["host"] = (value["host"]
3272
.decode("utf-8"))
3273
os.remove(stored_state_path)
3274
except IOError as e:
3275
if e.errno == errno.ENOENT:
3276
logger.warning("Could not load persistent state:"
3277
" {}".format(os.strerror(e.errno)))
3278
else:
3279
logger.critical("Could not load persistent state:",
3280
exc_info=e)
3281
raise
3282
except EOFError as e:
3283
logger.warning("Could not load persistent state: "
3284
"EOFError:",
3285
exc_info=e)
3286
3287
with PGPEngine() as pgp:
3288
for client_name, client in clients_data.items():
3289
# Skip removed clients
3290
if client_name not in client_settings:
3291
continue
3292
3293
# Decide which value to use after restoring saved state.
3294
# We have three different values: Old config file,
3295
# new config file, and saved state.
3296
# New config value takes precedence if it differs from old
3297
# config value, otherwise use saved state.
3298
for name, value in client_settings[client_name].items():
3299
try:
3300
# For each value in new config, check if it
3301
# differs from the old config value (Except for
3302
# the "secret" attribute)
3303
if (name != "secret"
3304
and (value !=
3305
old_client_settings[client_name][name])):
3306
client[name] = value
3307
except KeyError:
3308
pass
3309
3310
# Clients who has passed its expire date can still be
3311
# enabled if its last checker was successful. A Client
3312
# whose checker succeeded before we stored its state is
3313
# assumed to have successfully run all checkers during
3314
# downtime.
3315
if client["enabled"]:
3316
if datetime.datetime.utcnow() >= client["expires"]:
3317
if not client["last_checked_ok"]:
3318
logger.warning(
3319
"disabling client {} - Client never "
3320
"performed a successful checker".format(
3321
client_name))
3322
client["enabled"] = False
3323
elif client["last_checker_status"] != 0:
3324
logger.warning(
3325
"disabling client {} - Client last"
3326
" checker failed with error code"
3327
" {}".format(
3328
client_name,
3329
client["last_checker_status"]))
3330
client["enabled"] = False
3331
else:
3332
client["expires"] = (
3333
datetime.datetime.utcnow()
3334
+ client["timeout"])
3335
logger.debug("Last checker succeeded,"
3336
" keeping {} enabled".format(
3337
client_name))
2039
client_class = functools.partial(ClientDBusTransitional,
2040
bus = bus)
2041
def client_config_items(config, section):
2042
special_settings = {
2043
"approved_by_default":
2044
lambda: config.getboolean(section,
2045
"approved_by_default"),
2046
}
2047
for name, value in config.items(section):
3338
2048
try:
3339
client["secret"] = pgp.decrypt(
3340
client["encrypted_secret"],
3341
client_settings[client_name]["secret"])
3342
except PGPError:
3343
# If decryption fails, we use secret from new settings
3344
logger.debug("Failed to decrypt {} old secret".format(
3345
client_name))
3346
client["secret"] = (client_settings[client_name]
3347
["secret"])
3348
3349
# Add/remove clients based on new changes made to config
3350
for client_name in (set(old_client_settings)
3351
- set(client_settings)):
3352
del clients_data[client_name]
3353
for client_name in (set(client_settings)
3354
- set(old_client_settings)):
3355
clients_data[client_name] = client_settings[client_name]
3356
3357
# Create all client objects
3358
for client_name, client in clients_data.items():
3359
tcp_server.clients[client_name] = client_class(
3360
name=client_name,
3361
settings=client,
3362
server_settings=server_settings)
3363
2049
yield (name, special_settings[name]())
2050
except KeyError:
2051
yield (name, value)
2052
2053
tcp_server.clients.update(set(
2054
client_class(name = section,
2055
config= dict(client_config_items(
2056
client_config, section)))
2057
for section in client_config.sections()))
3364
2058
if not tcp_server.clients:
3365
2059
logger.warning("No clients defined")
3366
3367
if not foreground:
3368
if pidfile is not None:
3369
pid = os.getpid()
3370
try:
3371
with pidfile:
3372
print(pid, file=pidfile)
3373
except IOError:
3374
logger.error("Could not write to file %r with PID %d",
3375
pidfilename, pid)
3376
del pidfile
2060
2061
if not debug:
2062
try:
2063
with pidfile:
2064
pid = os.getpid()
2065
pidfile.write(str(pid) + "\n".encode("utf-8"))
2066
del pidfile
2067
except IOError:
2068
logger.error("Could not write to file %r with PID %d",
2069
pidfilename, pid)
2070
except NameError:
2071
# "pidfile" was never created
2072
pass
3377
2073
del pidfilename
3378
3379
for termsig in (signal.SIGHUP, signal.SIGTERM):
3380
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3381
lambda: main_loop.quit() and False)
3382
2074
2075
signal.signal(signal.SIGINT, signal.SIG_IGN)
2076
2077
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2078
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2079
3383
2080
if use_dbus:
3384
3385
@alternate_dbus_interfaces(
3386
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3387
class MandosDBusService(DBusObjectWithObjectManager):
2081
class MandosDBusService(dbus.service.Object):
3388
2082
"""A D-Bus proxy object"""
3389
3390
2083
def __init__(self):
3391
2084
dbus.service.Object.__init__(self, bus, "/")
3392
3393
2085
_interface = "se.recompile.Mandos"
3394
2086
3395
2087
@dbus.service.signal(_interface, signature="o")
3396
2088
def ClientAdded(self, objpath):
3397
2089
"D-Bus signal"
3398
2090
pass
3399
2091
3400
2092
@dbus.service.signal(_interface, signature="ss")
3401
def ClientNotFound(self, key_id, address):
2093
def ClientNotFound(self, fingerprint, address):
3402
2094
"D-Bus signal"
3403
2095
pass
3404
3405
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3406
"true"})
2096
3407
2097
@dbus.service.signal(_interface, signature="os")
3408
2098
def ClientRemoved(self, objpath, name):
3409
2099
"D-Bus signal"
3410
2100
pass
3411
3412
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3413
"true"})
2101
3414
2102
@dbus.service.method(_interface, out_signature="ao")
3415
2103
def GetAllClients(self):
3416
2104
"D-Bus method"
3417
return dbus.Array(c.dbus_object_path for c in
3418
tcp_server.clients.values())
3419
3420
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3421
"true"})
2105
return dbus.Array(c.dbus_object_path
2106
for c in tcp_server.clients)
2107
3422
2108
@dbus.service.method(_interface,
3423
2109
out_signature="a{oa{sv}}")
3424
2110
def GetAllClientsWithProperties(self):
3425
2111
"D-Bus method"
3426
2112
return dbus.Dictionary(
3427
{c.dbus_object_path: c.GetAll(
3428
"se.recompile.Mandos.Client")
3429
for c in tcp_server.clients.values()},
2113
((c.dbus_object_path, c.GetAll(""))
2114
for c in tcp_server.clients),
3430
2115
signature="oa{sv}")
3431
2116
3432
2117
@dbus.service.method(_interface, in_signature="o")
3433
2118
def RemoveClient(self, object_path):
3434
2119
"D-Bus method"
3435
for c in tcp_server.clients.values():
2120
for c in tcp_server.clients:
3436
2121
if c.dbus_object_path == object_path:
3437
del tcp_server.clients[c.name]
2122
tcp_server.clients.remove(c)
3438
2123
c.remove_from_connection()
3439
# Don't signal the disabling
2124
# Don't signal anything except ClientRemoved
3440
2125
c.disable(quiet=True)
3441
# Emit D-Bus signal for removal
3442
self.client_removed_signal(c)
2126
# Emit D-Bus signal
2127
self.ClientRemoved(object_path, c.name)
3443
2128
return
3444
2129
raise KeyError(object_path)
3445
2130
3446
2131
del _interface
3447
3448
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3449
out_signature="a{oa{sa{sv}}}")
3450
def GetManagedObjects(self):
3451
"""D-Bus method"""
3452
return dbus.Dictionary(
3453
{client.dbus_object_path:
3454
dbus.Dictionary(
3455
{interface: client.GetAll(interface)
3456
for interface in
3457
client._get_all_interface_names()})
3458
for client in tcp_server.clients.values()})
3459
3460
def client_added_signal(self, client):
3461
"""Send the new standard signal and the old signal"""
3462
if use_dbus:
3463
# New standard signal
3464
self.InterfacesAdded(
3465
client.dbus_object_path,
3466
dbus.Dictionary(
3467
{interface: client.GetAll(interface)
3468
for interface in
3469
client._get_all_interface_names()}))
3470
# Old signal
3471
self.ClientAdded(client.dbus_object_path)
3472
3473
def client_removed_signal(self, client):
3474
"""Send the new standard signal and the old signal"""
3475
if use_dbus:
3476
# New standard signal
3477
self.InterfacesRemoved(
3478
client.dbus_object_path,
3479
client._get_all_interface_names())
3480
# Old signal
3481
self.ClientRemoved(client.dbus_object_path,
3482
client.name)
3483
3484
mandos_dbus_service = MandosDBusService()
3485
3486
# Save modules to variables to exempt the modules from being
3487
# unloaded before the function registered with atexit() is run.
3488
mp = multiprocessing
3489
wn = wnull
3490
2132
2133
class MandosDBusServiceTransitional(MandosDBusService):
2134
__metaclass__ = AlternateDBusNamesMetaclass
2135
mandos_dbus_service = MandosDBusServiceTransitional()
2136
3491
2137
def cleanup():
3492
2138
"Cleanup function; run on exit"
3493
if zeroconf:
3494
service.cleanup()
3495
3496
mp.active_children()
3497
wn.close()
3498
if not (tcp_server.clients or client_settings):
3499
return
3500
3501
# Store client before exiting. Secrets are encrypted with key
3502
# based on what config file has. If config file is
3503
# removed/edited, old secret will thus be unrecovable.
3504
clients = {}
3505
with PGPEngine() as pgp:
3506
for client in tcp_server.clients.values():
3507
key = client_settings[client.name]["secret"]
3508
client.encrypted_secret = pgp.encrypt(client.secret,
3509
key)
3510
client_dict = {}
3511
3512
# A list of attributes that can not be pickled
3513
# + secret.
3514
exclude = {"bus", "changedstate", "secret",
3515
"checker", "server_settings"}
3516
for name, typ in inspect.getmembers(dbus.service
3517
.Object):
3518
exclude.add(name)
3519
3520
client_dict["encrypted_secret"] = (client
3521
.encrypted_secret)
3522
for attr in client.client_structure:
3523
if attr not in exclude:
3524
client_dict[attr] = getattr(client, attr)
3525
3526
clients[client.name] = client_dict
3527
del client_settings[client.name]["secret"]
3528
3529
try:
3530
with tempfile.NamedTemporaryFile(
3531
mode='wb',
3532
suffix=".pickle",
3533
prefix='clients-',
3534
dir=os.path.dirname(stored_state_path),
3535
delete=False) as stored_state:
3536
pickle.dump((clients, client_settings), stored_state,
3537
protocol=2)
3538
tempname = stored_state.name
3539
os.rename(tempname, stored_state_path)
3540
except (IOError, OSError) as e:
3541
if not debug:
3542
try:
3543
os.remove(tempname)
3544
except NameError:
3545
pass
3546
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
3547
logger.warning("Could not save persistent state: {}"
3548
.format(os.strerror(e.errno)))
3549
else:
3550
logger.warning("Could not save persistent state:",
3551
exc_info=e)
3552
raise
3553
3554
# Delete all clients, and settings from config
2139
service.cleanup()
2140
2141
multiprocessing.active_children()
3555
2142
while tcp_server.clients:
3556
name, client = tcp_server.clients.popitem()
2143
client = tcp_server.clients.pop()
3557
2144
if use_dbus:
3558
2145
client.remove_from_connection()
3559
# Don't signal the disabling
2146
client.disable_hook = None
2147
# Don't signal anything except ClientRemoved
3560
2148
client.disable(quiet=True)
3561
# Emit D-Bus signal for removal
3562
2149
if use_dbus:
3563
mandos_dbus_service.client_removed_signal(client)
3564
client_settings.clear()
3565
2150
# Emit D-Bus signal
2151
mandos_dbus_service.ClientRemoved(client
2152
.dbus_object_path,
2153
client.name)
2154
3566
2155
atexit.register(cleanup)
3567
3568
for client in tcp_server.clients.values():
2156
2157
for client in tcp_server.clients:
3569
2158
if use_dbus:
3570
# Emit D-Bus signal for adding
3571
mandos_dbus_service.client_added_signal(client)
3572
# Need to initiate checking of clients
3573
if client.enabled:
3574
client.init_checker()
3575
2159
# Emit D-Bus signal
2160
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2161
client.enable()
2162
3576
2163
tcp_server.enable()
3577
2164
tcp_server.server_activate()
3578
2165
3579
2166
# Find out what port we got
3580
if zeroconf:
3581
service.port = tcp_server.socket.getsockname()[1]
2167
service.port = tcp_server.socket.getsockname()[1]
3582
2168
if use_ipv6:
3583
2169
logger.info("Now listening on address %r, port %d,"
3584
" flowinfo %d, scope_id %d",
3585
*tcp_server.socket.getsockname())
2170
" flowinfo %d, scope_id %d"
2171
% tcp_server.socket.getsockname())
3586
2172
else: # IPv4
3587
logger.info("Now listening on address %r, port %d",
3588
*tcp_server.socket.getsockname())
3589
3590
# service.interface = tcp_server.socket.getsockname()[3]
3591
2173
logger.info("Now listening on address %r, port %d"
2174
% tcp_server.socket.getsockname())
2175
2176
#service.interface = tcp_server.socket.getsockname()[3]
2177
3592
2178
try:
3593
if zeroconf:
3594
# From the Avahi example code
3595
try:
3596
service.activate()
3597
except dbus.exceptions.DBusException as error:
3598
logger.critical("D-Bus Exception", exc_info=error)
3599
cleanup()
3600
sys.exit(1)
3601
# End of Avahi example code
3602
3603
GLib.io_add_watch(tcp_server.fileno(), GLib.IO_IN,
3604
lambda *args, **kwargs:
3605
(tcp_server.handle_request
3606
(*args[2:], **kwargs) or True))
3607
2179
# From the Avahi example code
2180
try:
2181
service.activate()
2182
except dbus.exceptions.DBusException as error:
2183
logger.critical("DBusException: %s", error)
2184
cleanup()
2185
sys.exit(1)
2186
# End of Avahi example code
2187
2188
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2189
lambda *args, **kwargs:
2190
(tcp_server.handle_request
2191
(*args[2:], **kwargs) or True))
2192
3608
2193
logger.debug("Starting main loop")
3609
2194
main_loop.run()
3610
2195
except AvahiError as error:
3611
logger.critical("Avahi Error", exc_info=error)
2196
logger.critical("AvahiError: %s", error)
3612
2197
cleanup()
3613
2198
sys.exit(1)
3614
2199
except KeyboardInterrupt:
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0