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- Committer: Teddy Hogeborn
- Date: 2011-04-02 06:37:18 UTC
- Revision ID: teddy@fukt.bsnet.se-20110402063718-13ldrcuu0t33sdc4
* mandos: Tolerate restarting Avahi servers. Also Changed to new
"except x as y" exception syntax.
(AvahiService.entry_group_state_changed_match): New; contains the
SignalMatch object.
(AvahiService.remove): Really remove the group and the signal
connection, if any.
(AvahiService.add): Always create a new group and signal connection.
(AvahiService.cleanup): Changed to simply call remove().
(AvahiService.server_state_changed): Handle and log more bad states.
(AvahiService.activate): Set "follow_name_owner_changes=True" on the
Avahi Server proxy object.
(ClientDBus.checked_ok): Do not return anything.
(ClientDBus.CheckedOK): Do not return anything, as documented.
* mandos-monitor: Call D-Bus methods asynchronously.
"except x as y" exception syntax.
(AvahiService.entry_group_state_changed_match): New; contains the
SignalMatch object.
(AvahiService.remove): Really remove the group and the signal
connection, if any.
(AvahiService.add): Always create a new group and signal connection.
(AvahiService.cleanup): Changed to simply call remove().
(AvahiService.server_state_changed): Handle and log more bad states.
(AvahiService.activate): Set "follow_name_owner_changes=True" on the
Avahi Server proxy object.
(ClientDBus.checked_ok): Do not return anything.
(ClientDBus.CheckedOK): Do not return anything, as documented.
* mandos-monitor: Call D-Bus methods asynchronously.
- files added:
- initramfs-tools-hook-conf
- files removed:
- bugs.xml
- debian/tests
- debian/upstream
- network-hooks.d
- plugin-helpers
- files modified:
- .bzrignore
added
removed
mandos
1
1
#!/usr/bin/python
2
2
# -*- mode: python; coding: utf-8 -*-
3
#
3
#
4
4
# Mandos server - give out binary blobs to connecting clients.
5
#
5
#
6
6
# This program is partly derived from an example program for an Avahi
7
7
# service publisher, downloaded from
8
8
# <http://avahi.org/wiki/PythonPublishExample>. This includes the
9
9
# methods "add", "remove", "server_state_changed",
10
10
# "entry_group_state_changed", "cleanup", and "activate" in the
11
11
# "AvahiService" class, and some lines in "main".
12
#
12
#
13
13
# Everything else is
14
# Copyright © 2008-2019 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
#
32
# Contact the authors at <mandos@recompile.se>.
33
#
28
# along with this program. If not, see
29
# <http://www.gnu.org/licenses/>.
30
#
31
# Contact the authors at <mandos@fukt.bsnet.se>.
32
#
34
33
35
34
from __future__ import (division, absolute_import, print_function,
36
35
unicode_literals)
37
36
38
try:
39
from future_builtins import *
40
except ImportError:
41
pass
42
43
try:
44
import SocketServer as socketserver
45
except ImportError:
46
import socketserver
37
import SocketServer as socketserver
47
38
import socket
48
39
import argparse
49
40
import datetime
50
41
import errno
51
try:
52
import ConfigParser as configparser
53
except ImportError:
54
import configparser
42
import gnutls.crypto
43
import gnutls.connection
44
import gnutls.errors
45
import gnutls.library.functions
46
import gnutls.library.constants
47
import gnutls.library.types
48
import ConfigParser as configparser
55
49
import sys
56
50
import re
57
51
import os
66
60
import struct
67
61
import fcntl
68
62
import functools
69
try:
70
import cPickle as pickle
71
except ImportError:
72
import pickle
63
import cPickle as pickle
73
64
import multiprocessing
74
import types
75
import binascii
76
import tempfile
77
import itertools
78
import collections
79
import codecs
80
65
81
66
import dbus
82
67
import dbus.service
83
from gi.repository import GLib
68
import gobject
69
import avahi
84
70
from dbus.mainloop.glib import DBusGMainLoop
85
71
import ctypes
86
72
import ctypes.util
87
73
import xml.dom.minidom
88
74
import inspect
89
75
90
# Try to find the value of SO_BINDTODEVICE:
91
76
try:
92
# This is where SO_BINDTODEVICE is in Python 3.3 (or 3.4?) and
93
# newer, and it is also the most natural place for it:
94
77
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
95
78
except AttributeError:
96
79
try:
97
# This is where SO_BINDTODEVICE was up to and including Python
98
# 2.6, and also 3.2:
99
80
from IN import SO_BINDTODEVICE
100
81
except ImportError:
101
# In Python 2.7 it seems to have been removed entirely.
102
# Try running the C preprocessor:
103
try:
104
cc = subprocess.Popen(["cc", "--language=c", "-E",
105
"/dev/stdin"],
106
stdin=subprocess.PIPE,
107
stdout=subprocess.PIPE)
108
stdout = cc.communicate(
109
"#include <sys/socket.h>\nSO_BINDTODEVICE\n")[0]
110
SO_BINDTODEVICE = int(stdout.splitlines()[-1])
111
except (OSError, ValueError, IndexError):
112
# No value found
113
SO_BINDTODEVICE = None
114
115
if sys.version_info.major == 2:
116
str = unicode
117
118
version = "1.8.4"
119
stored_state_file = "clients.pickle"
120
121
logger = logging.getLogger()
122
syslogger = None
123
124
try:
125
if_nametoindex = ctypes.cdll.LoadLibrary(
126
ctypes.util.find_library("c")).if_nametoindex
127
except (OSError, AttributeError):
128
129
def if_nametoindex(interface):
130
"Get an interface index the hard way, i.e. using fcntl()"
131
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
132
with contextlib.closing(socket.socket()) as s:
133
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
134
struct.pack(b"16s16x", interface))
135
interface_index = struct.unpack("I", ifreq[16:20])[0]
136
return interface_index
137
138
139
def copy_function(func):
140
"""Make a copy of a function"""
141
if sys.version_info.major == 2:
142
return types.FunctionType(func.func_code,
143
func.func_globals,
144
func.func_name,
145
func.func_defaults,
146
func.func_closure)
147
else:
148
return types.FunctionType(func.__code__,
149
func.__globals__,
150
func.__name__,
151
func.__defaults__,
152
func.__closure__)
153
154
155
def initlogger(debug, level=logging.WARNING):
156
"""init logger and add loglevel"""
157
158
global syslogger
159
syslogger = (logging.handlers.SysLogHandler(
160
facility=logging.handlers.SysLogHandler.LOG_DAEMON,
161
address="/dev/log"))
162
syslogger.setFormatter(logging.Formatter
163
('Mandos [%(process)d]: %(levelname)s:'
164
' %(message)s'))
165
logger.addHandler(syslogger)
166
167
if debug:
168
console = logging.StreamHandler()
169
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
170
' [%(process)d]:'
171
' %(levelname)s:'
172
' %(message)s'))
173
logger.addHandler(console)
174
logger.setLevel(level)
175
176
177
class PGPError(Exception):
178
"""Exception if encryption/decryption fails"""
179
pass
180
181
182
class PGPEngine(object):
183
"""A simple class for OpenPGP symmetric encryption & decryption"""
184
185
def __init__(self):
186
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
187
self.gpg = "gpg"
188
try:
189
output = subprocess.check_output(["gpgconf"])
190
for line in output.splitlines():
191
name, text, path = line.split(b":")
192
if name == "gpg":
193
self.gpg = path
194
break
195
except OSError as e:
196
if e.errno != errno.ENOENT:
197
raise
198
self.gnupgargs = ['--batch',
199
'--homedir', self.tempdir,
200
'--force-mdc',
201
'--quiet']
202
# Only GPG version 1 has the --no-use-agent option.
203
if self.gpg == "gpg" or self.gpg.endswith("/gpg"):
204
self.gnupgargs.append("--no-use-agent")
205
206
def __enter__(self):
207
return self
208
209
def __exit__(self, exc_type, exc_value, traceback):
210
self._cleanup()
211
return False
212
213
def __del__(self):
214
self._cleanup()
215
216
def _cleanup(self):
217
if self.tempdir is not None:
218
# Delete contents of tempdir
219
for root, dirs, files in os.walk(self.tempdir,
220
topdown=False):
221
for filename in files:
222
os.remove(os.path.join(root, filename))
223
for dirname in dirs:
224
os.rmdir(os.path.join(root, dirname))
225
# Remove tempdir
226
os.rmdir(self.tempdir)
227
self.tempdir = None
228
229
def password_encode(self, password):
230
# Passphrase can not be empty and can not contain newlines or
231
# NUL bytes. So we prefix it and hex encode it.
232
encoded = b"mandos" + binascii.hexlify(password)
233
if len(encoded) > 2048:
234
# GnuPG can't handle long passwords, so encode differently
235
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
236
.replace(b"\n", b"\\n")
237
.replace(b"\0", b"\\x00"))
238
return encoded
239
240
def encrypt(self, data, password):
241
passphrase = self.password_encode(password)
242
with tempfile.NamedTemporaryFile(
243
dir=self.tempdir) as passfile:
244
passfile.write(passphrase)
245
passfile.flush()
246
proc = subprocess.Popen([self.gpg, '--symmetric',
247
'--passphrase-file',
248
passfile.name]
249
+ self.gnupgargs,
250
stdin=subprocess.PIPE,
251
stdout=subprocess.PIPE,
252
stderr=subprocess.PIPE)
253
ciphertext, err = proc.communicate(input=data)
254
if proc.returncode != 0:
255
raise PGPError(err)
256
return ciphertext
257
258
def decrypt(self, data, password):
259
passphrase = self.password_encode(password)
260
with tempfile.NamedTemporaryFile(
261
dir=self.tempdir) as passfile:
262
passfile.write(passphrase)
263
passfile.flush()
264
proc = subprocess.Popen([self.gpg, '--decrypt',
265
'--passphrase-file',
266
passfile.name]
267
+ self.gnupgargs,
268
stdin=subprocess.PIPE,
269
stdout=subprocess.PIPE,
270
stderr=subprocess.PIPE)
271
decrypted_plaintext, err = proc.communicate(input=data)
272
if proc.returncode != 0:
273
raise PGPError(err)
274
return decrypted_plaintext
275
276
277
# Pretend that we have an Avahi module
278
class avahi(object):
279
"""This isn't so much a class as it is a module-like namespace."""
280
IF_UNSPEC = -1 # avahi-common/address.h
281
PROTO_UNSPEC = -1 # avahi-common/address.h
282
PROTO_INET = 0 # avahi-common/address.h
283
PROTO_INET6 = 1 # avahi-common/address.h
284
DBUS_NAME = "org.freedesktop.Avahi"
285
DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"
286
DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"
287
DBUS_PATH_SERVER = "/"
288
289
@staticmethod
290
def string_array_to_txt_array(t):
291
return dbus.Array((dbus.ByteArray(s.encode("utf-8"))
292
for s in t), signature="ay")
293
ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h
294
ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h
295
ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h
296
SERVER_INVALID = 0 # avahi-common/defs.h
297
SERVER_REGISTERING = 1 # avahi-common/defs.h
298
SERVER_RUNNING = 2 # avahi-common/defs.h
299
SERVER_COLLISION = 3 # avahi-common/defs.h
300
SERVER_FAILURE = 4 # avahi-common/defs.h
301
82
SO_BINDTODEVICE = None
83
84
85
version = "1.3.0"
86
87
#logger = logging.getLogger('mandos')
88
logger = logging.Logger('mandos')
89
syslogger = (logging.handlers.SysLogHandler
90
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
91
address = str("/dev/log")))
92
syslogger.setFormatter(logging.Formatter
93
('Mandos [%(process)d]: %(levelname)s:'
94
' %(message)s'))
95
logger.addHandler(syslogger)
96
97
console = logging.StreamHandler()
98
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
99
' %(levelname)s:'
100
' %(message)s'))
101
logger.addHandler(console)
302
102
303
103
class AvahiError(Exception):
304
104
def __init__(self, value, *args, **kwargs):
305
105
self.value = value
306
return super(AvahiError, self).__init__(value, *args,
307
**kwargs)
308
106
super(AvahiError, self).__init__(value, *args, **kwargs)
107
def __unicode__(self):
108
return unicode(repr(self.value))
309
109
310
110
class AvahiServiceError(AvahiError):
311
111
pass
312
112
313
314
113
class AvahiGroupError(AvahiError):
315
114
pass
316
115
317
116
318
117
class AvahiService(object):
319
118
"""An Avahi (Zeroconf) service.
320
119
321
120
Attributes:
322
121
interface: integer; avahi.IF_UNSPEC or an interface index.
323
122
Used to optionally bind to the specified interface.
324
123
name: string; Example: 'Mandos'
325
124
type: string; Example: '_mandos._tcp'.
326
See <https://www.iana.org/assignments/service-names-port-numbers>
125
See <http://www.dns-sd.org/ServiceTypes.html>
327
126
port: integer; what port to announce
328
127
TXT: list of strings; TXT record for the service
329
128
domain: string; Domain to publish on, default to .local if empty.
335
134
server: D-Bus Server
336
135
bus: dbus.SystemBus()
337
136
"""
338
339
def __init__(self,
340
interface=avahi.IF_UNSPEC,
341
name=None,
342
servicetype=None,
343
port=None,
344
TXT=None,
345
domain="",
346
host="",
347
max_renames=32768,
348
protocol=avahi.PROTO_UNSPEC,
349
bus=None):
137
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
138
servicetype = None, port = None, TXT = None,
139
domain = "", host = "", max_renames = 32768,
140
protocol = avahi.PROTO_UNSPEC, bus = None):
350
141
self.interface = interface
351
142
self.name = name
352
143
self.type = servicetype
361
152
self.server = None
362
153
self.bus = bus
363
154
self.entry_group_state_changed_match = None
364
365
def rename(self, remove=True):
155
def rename(self):
366
156
"""Derived from the Avahi example code"""
367
157
if self.rename_count >= self.max_renames:
368
158
logger.critical("No suitable Zeroconf service name found"
369
159
" after %i retries, exiting.",
370
160
self.rename_count)
371
161
raise AvahiServiceError("Too many renames")
372
self.name = str(
373
self.server.GetAlternativeServiceName(self.name))
374
self.rename_count += 1
162
self.name = unicode(self.server.GetAlternativeServiceName(self.name))
375
163
logger.info("Changing Zeroconf service name to %r ...",
376
164
self.name)
377
if remove:
378
self.remove()
165
syslogger.setFormatter(logging.Formatter
166
('Mandos (%s) [%%(process)d]:'
167
' %%(levelname)s: %%(message)s'
168
% self.name))
169
self.remove()
379
170
try:
380
171
self.add()
381
172
except dbus.exceptions.DBusException as error:
382
if (error.get_dbus_name()
383
== "org.freedesktop.Avahi.CollisionError"):
384
logger.info("Local Zeroconf service name collision.")
385
return self.rename(remove=False)
386
else:
387
logger.critical("D-Bus Exception", exc_info=error)
388
self.cleanup()
389
os._exit(1)
390
173
logger.critical("DBusException: %s", error)
174
self.cleanup()
175
os._exit(1)
176
self.rename_count += 1
391
177
def remove(self):
392
178
"""Derived from the Avahi example code"""
179
if self.group is not None:
180
try:
181
self.group.Free()
182
except (dbus.exceptions.UnknownMethodException,
183
dbus.exceptions.DBusException) as e:
184
pass
185
self.group = None
393
186
if self.entry_group_state_changed_match is not None:
394
187
self.entry_group_state_changed_match.remove()
395
188
self.entry_group_state_changed_match = None
396
if self.group is not None:
397
self.group.Reset()
398
399
189
def add(self):
400
190
"""Derived from the Avahi example code"""
401
191
self.remove()
402
if self.group is None:
403
self.group = dbus.Interface(
404
self.bus.get_object(avahi.DBUS_NAME,
405
self.server.EntryGroupNew()),
406
avahi.DBUS_INTERFACE_ENTRY_GROUP)
192
self.group = dbus.Interface(
193
self.bus.get_object(avahi.DBUS_NAME,
194
self.server.EntryGroupNew(),
195
follow_name_owner_changes=True),
196
avahi.DBUS_INTERFACE_ENTRY_GROUP)
407
197
self.entry_group_state_changed_match = (
408
198
self.group.connect_to_signal(
409
'StateChanged', self.entry_group_state_changed))
199
'StateChanged', self .entry_group_state_changed))
410
200
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
411
201
self.name, self.type)
412
202
self.group.AddService(
418
208
dbus.UInt16(self.port),
419
209
avahi.string_array_to_txt_array(self.TXT))
420
210
self.group.Commit()
421
422
211
def entry_group_state_changed(self, state, error):
423
212
"""Derived from the Avahi example code"""
424
213
logger.debug("Avahi entry group state change: %i", state)
425
214
426
215
if state == avahi.ENTRY_GROUP_ESTABLISHED:
427
216
logger.debug("Zeroconf service established.")
428
217
elif state == avahi.ENTRY_GROUP_COLLISION:
430
219
self.rename()
431
220
elif state == avahi.ENTRY_GROUP_FAILURE:
432
221
logger.critical("Avahi: Error in group state changed %s",
433
str(error))
434
raise AvahiGroupError("State changed: {!s}".format(error))
435
222
unicode(error))
223
raise AvahiGroupError("State changed: %s"
224
% unicode(error))
436
225
def cleanup(self):
437
226
"""Derived from the Avahi example code"""
438
if self.group is not None:
439
try:
440
self.group.Free()
441
except (dbus.exceptions.UnknownMethodException,
442
dbus.exceptions.DBusException):
443
pass
444
self.group = None
445
227
self.remove()
446
447
228
def server_state_changed(self, state, error=None):
448
229
"""Derived from the Avahi example code"""
449
230
logger.debug("Avahi server state change: %i", state)
450
bad_states = {
451
avahi.SERVER_INVALID: "Zeroconf server invalid",
452
avahi.SERVER_REGISTERING: None,
453
avahi.SERVER_COLLISION: "Zeroconf server name collision",
454
avahi.SERVER_FAILURE: "Zeroconf server failure",
455
}
231
bad_states = { avahi.SERVER_INVALID:
232
"Zeroconf server invalid",
233
avahi.SERVER_REGISTERING: None,
234
avahi.SERVER_COLLISION:
235
"Zeroconf server name collision",
236
avahi.SERVER_FAILURE:
237
"Zeroconf server failure" }
456
238
if state in bad_states:
457
if bad_states[state] is not None:
458
if error is None:
459
logger.error(bad_states[state])
460
else:
461
logger.error(bad_states[state] + ": %r", error)
462
self.cleanup()
239
if bad_states[state]:
240
logger.error(bad_states[state])
241
self.remove()
463
242
elif state == avahi.SERVER_RUNNING:
464
try:
465
self.add()
466
except dbus.exceptions.DBusException as error:
467
if (error.get_dbus_name()
468
== "org.freedesktop.Avahi.CollisionError"):
469
logger.info("Local Zeroconf service name"
470
" collision.")
471
return self.rename(remove=False)
472
else:
473
logger.critical("D-Bus Exception", exc_info=error)
474
self.cleanup()
475
os._exit(1)
243
self.add()
476
244
else:
477
if error is None:
478
logger.debug("Unknown state: %r", state)
479
else:
480
logger.debug("Unknown state: %r: %r", state, error)
481
245
logger.debug("Unknown state: %r", state)
482
246
def activate(self):
483
247
"""Derived from the Avahi example code"""
484
248
if self.server is None:
488
252
follow_name_owner_changes=True),
489
253
avahi.DBUS_INTERFACE_SERVER)
490
254
self.server.connect_to_signal("StateChanged",
491
self.server_state_changed)
255
self.server_state_changed)
492
256
self.server_state_changed(self.server.GetState())
493
257
494
258
495
class AvahiServiceToSyslog(AvahiService):
496
def rename(self, *args, **kwargs):
497
"""Add the new name to the syslog messages"""
498
ret = super(AvahiServiceToSyslog, self).rename(*args, **kwargs)
499
syslogger.setFormatter(logging.Formatter(
500
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
501
.format(self.name)))
502
return ret
503
504
505
# Pretend that we have a GnuTLS module
506
class gnutls(object):
507
"""This isn't so much a class as it is a module-like namespace."""
508
509
library = ctypes.util.find_library("gnutls")
510
if library is None:
511
library = ctypes.util.find_library("gnutls-deb0")
512
_library = ctypes.cdll.LoadLibrary(library)
513
del library
514
515
# Unless otherwise indicated, the constants and types below are
516
# all from the gnutls/gnutls.h C header file.
517
518
# Constants
519
E_SUCCESS = 0
520
E_INTERRUPTED = -52
521
E_AGAIN = -28
522
CRT_OPENPGP = 2
523
CRT_RAWPK = 3
524
CLIENT = 2
525
SHUT_RDWR = 0
526
CRD_CERTIFICATE = 1
527
E_NO_CERTIFICATE_FOUND = -49
528
X509_FMT_DER = 0
529
NO_TICKETS = 1<<10
530
ENABLE_RAWPK = 1<<18
531
CTYPE_PEERS = 3
532
KEYID_USE_SHA256 = 1 # gnutls/x509.h
533
OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
534
535
# Types
536
class session_int(ctypes.Structure):
537
_fields_ = []
538
session_t = ctypes.POINTER(session_int)
539
540
class certificate_credentials_st(ctypes.Structure):
541
_fields_ = []
542
certificate_credentials_t = ctypes.POINTER(
543
certificate_credentials_st)
544
certificate_type_t = ctypes.c_int
545
546
class datum_t(ctypes.Structure):
547
_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
548
('size', ctypes.c_uint)]
549
550
class openpgp_crt_int(ctypes.Structure):
551
_fields_ = []
552
openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
553
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
554
log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
555
credentials_type_t = ctypes.c_int
556
transport_ptr_t = ctypes.c_void_p
557
close_request_t = ctypes.c_int
558
559
# Exceptions
560
class Error(Exception):
561
def __init__(self, message=None, code=None, args=()):
562
# Default usage is by a message string, but if a return
563
# code is passed, convert it to a string with
564
# gnutls.strerror()
565
self.code = code
566
if message is None and code is not None:
567
message = gnutls.strerror(code)
568
return super(gnutls.Error, self).__init__(
569
message, *args)
570
571
class CertificateSecurityError(Error):
572
pass
573
574
# Classes
575
class Credentials(object):
576
def __init__(self):
577
self._c_object = gnutls.certificate_credentials_t()
578
gnutls.certificate_allocate_credentials(
579
ctypes.byref(self._c_object))
580
self.type = gnutls.CRD_CERTIFICATE
581
582
def __del__(self):
583
gnutls.certificate_free_credentials(self._c_object)
584
585
class ClientSession(object):
586
def __init__(self, socket, credentials=None):
587
self._c_object = gnutls.session_t()
588
gnutls_flags = gnutls.CLIENT
589
if gnutls.check_version("3.5.6"):
590
gnutls_flags |= gnutls.NO_TICKETS
591
if gnutls.has_rawpk:
592
gnutls_flags |= gnutls.ENABLE_RAWPK
593
gnutls.init(ctypes.byref(self._c_object), gnutls_flags)
594
del gnutls_flags
595
gnutls.set_default_priority(self._c_object)
596
gnutls.transport_set_ptr(self._c_object, socket.fileno())
597
gnutls.handshake_set_private_extensions(self._c_object,
598
True)
599
self.socket = socket
600
if credentials is None:
601
credentials = gnutls.Credentials()
602
gnutls.credentials_set(self._c_object, credentials.type,
603
ctypes.cast(credentials._c_object,
604
ctypes.c_void_p))
605
self.credentials = credentials
606
607
def __del__(self):
608
gnutls.deinit(self._c_object)
609
610
def handshake(self):
611
return gnutls.handshake(self._c_object)
612
613
def send(self, data):
614
data = bytes(data)
615
data_len = len(data)
616
while data_len > 0:
617
data_len -= gnutls.record_send(self._c_object,
618
data[-data_len:],
619
data_len)
620
621
def bye(self):
622
return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
623
624
# Error handling functions
625
def _error_code(result):
626
"""A function to raise exceptions on errors, suitable
627
for the 'restype' attribute on ctypes functions"""
628
if result >= 0:
629
return result
630
if result == gnutls.E_NO_CERTIFICATE_FOUND:
631
raise gnutls.CertificateSecurityError(code=result)
632
raise gnutls.Error(code=result)
633
634
def _retry_on_error(result, func, arguments):
635
"""A function to retry on some errors, suitable
636
for the 'errcheck' attribute on ctypes functions"""
637
while result < 0:
638
if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
639
return _error_code(result)
640
result = func(*arguments)
641
return result
642
643
# Unless otherwise indicated, the function declarations below are
644
# all from the gnutls/gnutls.h C header file.
645
646
# Functions
647
priority_set_direct = _library.gnutls_priority_set_direct
648
priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
649
ctypes.POINTER(ctypes.c_char_p)]
650
priority_set_direct.restype = _error_code
651
652
init = _library.gnutls_init
653
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
654
init.restype = _error_code
655
656
set_default_priority = _library.gnutls_set_default_priority
657
set_default_priority.argtypes = [session_t]
658
set_default_priority.restype = _error_code
659
660
record_send = _library.gnutls_record_send
661
record_send.argtypes = [session_t, ctypes.c_void_p,
662
ctypes.c_size_t]
663
record_send.restype = ctypes.c_ssize_t
664
record_send.errcheck = _retry_on_error
665
666
certificate_allocate_credentials = (
667
_library.gnutls_certificate_allocate_credentials)
668
certificate_allocate_credentials.argtypes = [
669
ctypes.POINTER(certificate_credentials_t)]
670
certificate_allocate_credentials.restype = _error_code
671
672
certificate_free_credentials = (
673
_library.gnutls_certificate_free_credentials)
674
certificate_free_credentials.argtypes = [
675
certificate_credentials_t]
676
certificate_free_credentials.restype = None
677
678
handshake_set_private_extensions = (
679
_library.gnutls_handshake_set_private_extensions)
680
handshake_set_private_extensions.argtypes = [session_t,
681
ctypes.c_int]
682
handshake_set_private_extensions.restype = None
683
684
credentials_set = _library.gnutls_credentials_set
685
credentials_set.argtypes = [session_t, credentials_type_t,
686
ctypes.c_void_p]
687
credentials_set.restype = _error_code
688
689
strerror = _library.gnutls_strerror
690
strerror.argtypes = [ctypes.c_int]
691
strerror.restype = ctypes.c_char_p
692
693
certificate_type_get = _library.gnutls_certificate_type_get
694
certificate_type_get.argtypes = [session_t]
695
certificate_type_get.restype = _error_code
696
697
certificate_get_peers = _library.gnutls_certificate_get_peers
698
certificate_get_peers.argtypes = [session_t,
699
ctypes.POINTER(ctypes.c_uint)]
700
certificate_get_peers.restype = ctypes.POINTER(datum_t)
701
702
global_set_log_level = _library.gnutls_global_set_log_level
703
global_set_log_level.argtypes = [ctypes.c_int]
704
global_set_log_level.restype = None
705
706
global_set_log_function = _library.gnutls_global_set_log_function
707
global_set_log_function.argtypes = [log_func]
708
global_set_log_function.restype = None
709
710
deinit = _library.gnutls_deinit
711
deinit.argtypes = [session_t]
712
deinit.restype = None
713
714
handshake = _library.gnutls_handshake
715
handshake.argtypes = [session_t]
716
handshake.restype = _error_code
717
handshake.errcheck = _retry_on_error
718
719
transport_set_ptr = _library.gnutls_transport_set_ptr
720
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
721
transport_set_ptr.restype = None
722
723
bye = _library.gnutls_bye
724
bye.argtypes = [session_t, close_request_t]
725
bye.restype = _error_code
726
bye.errcheck = _retry_on_error
727
728
check_version = _library.gnutls_check_version
729
check_version.argtypes = [ctypes.c_char_p]
730
check_version.restype = ctypes.c_char_p
731
732
_need_version = b"3.3.0"
733
if check_version(_need_version) is None:
734
raise self.Error("Needs GnuTLS {} or later"
735
.format(_need_version))
736
737
_tls_rawpk_version = b"3.6.6"
738
has_rawpk = bool(check_version(_tls_rawpk_version))
739
740
if has_rawpk:
741
# Types
742
class pubkey_st(ctypes.Structure):
743
_fields = []
744
pubkey_t = ctypes.POINTER(pubkey_st)
745
746
x509_crt_fmt_t = ctypes.c_int
747
748
# All the function declarations below are from gnutls/abstract.h
749
pubkey_init = _library.gnutls_pubkey_init
750
pubkey_init.argtypes = [ctypes.POINTER(pubkey_t)]
751
pubkey_init.restype = _error_code
752
753
pubkey_import = _library.gnutls_pubkey_import
754
pubkey_import.argtypes = [pubkey_t, ctypes.POINTER(datum_t),
755
x509_crt_fmt_t]
756
pubkey_import.restype = _error_code
757
758
pubkey_get_key_id = _library.gnutls_pubkey_get_key_id
759
pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,
760
ctypes.POINTER(ctypes.c_ubyte),
761
ctypes.POINTER(ctypes.c_size_t)]
762
pubkey_get_key_id.restype = _error_code
763
764
pubkey_deinit = _library.gnutls_pubkey_deinit
765
pubkey_deinit.argtypes = [pubkey_t]
766
pubkey_deinit.restype = None
767
else:
768
# All the function declarations below are from gnutls/openpgp.h
769
770
openpgp_crt_init = _library.gnutls_openpgp_crt_init
771
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
772
openpgp_crt_init.restype = _error_code
773
774
openpgp_crt_import = _library.gnutls_openpgp_crt_import
775
openpgp_crt_import.argtypes = [openpgp_crt_t,
776
ctypes.POINTER(datum_t),
777
openpgp_crt_fmt_t]
778
openpgp_crt_import.restype = _error_code
779
780
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
781
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
782
ctypes.POINTER(ctypes.c_uint)]
783
openpgp_crt_verify_self.restype = _error_code
784
785
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
786
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
787
openpgp_crt_deinit.restype = None
788
789
openpgp_crt_get_fingerprint = (
790
_library.gnutls_openpgp_crt_get_fingerprint)
791
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
792
ctypes.c_void_p,
793
ctypes.POINTER(
794
ctypes.c_size_t)]
795
openpgp_crt_get_fingerprint.restype = _error_code
796
797
if check_version("3.6.4"):
798
certificate_type_get2 = _library.gnutls_certificate_type_get2
799
certificate_type_get2.argtypes = [session_t, ctypes.c_int]
800
certificate_type_get2.restype = _error_code
801
802
# Remove non-public functions
803
del _error_code, _retry_on_error
804
805
806
def call_pipe(connection, # : multiprocessing.Connection
807
func, *args, **kwargs):
808
"""This function is meant to be called by multiprocessing.Process
809
810
This function runs func(*args, **kwargs), and writes the resulting
811
return value on the provided multiprocessing.Connection.
812
"""
813
connection.send(func(*args, **kwargs))
814
connection.close()
815
816
817
259
class Client(object):
818
260
"""A representation of a client host served by this server.
819
261
820
262
Attributes:
821
approved: bool(); 'None' if not yet approved/disapproved
263
_approved: bool(); 'None' if not yet approved/disapproved
822
264
approval_delay: datetime.timedelta(); Time to wait for approval
823
265
approval_duration: datetime.timedelta(); Duration of one approval
824
266
checker: subprocess.Popen(); a running checker process used
825
267
to see if the client lives.
826
268
'None' if no process is running.
827
checker_callback_tag: a GLib event source tag, or None
269
checker_callback_tag: a gobject event source tag, or None
828
270
checker_command: string; External command which is run to check
829
271
if client lives. %() expansions are done at
830
272
runtime with vars(self) as dict, so that for
831
273
instance %(name)s can be used in the command.
832
checker_initiator_tag: a GLib event source tag, or None
274
checker_initiator_tag: a gobject event source tag, or None
833
275
created: datetime.datetime(); (UTC) object creation
834
client_structure: Object describing what attributes a client has
835
and is used for storing the client at exit
836
276
current_checker_command: string; current running checker_command
837
disable_initiator_tag: a GLib event source tag, or None
277
disable_hook: If set, called by disable() as disable_hook(self)
278
disable_initiator_tag: a gobject event source tag, or None
838
279
enabled: bool()
839
280
fingerprint: string (40 or 32 hexadecimal digits); used to
840
uniquely identify an OpenPGP client
841
key_id: string (64 hexadecimal digits); used to uniquely identify
842
a client using raw public keys
281
uniquely identify the client
843
282
host: string; available for use by the checker command
844
283
interval: datetime.timedelta(); How often to start a new checker
845
284
last_approval_request: datetime.datetime(); (UTC) or None
846
285
last_checked_ok: datetime.datetime(); (UTC) or None
847
last_checker_status: integer between 0 and 255 reflecting exit
848
status of last checker. -1 reflects crashed
849
checker, -2 means no checker completed yet.
850
last_checker_signal: The signal which killed the last checker, if
851
last_checker_status is -1
852
last_enabled: datetime.datetime(); (UTC) or None
286
last_enabled: datetime.datetime(); (UTC)
853
287
name: string; from the config file, used in log messages and
854
288
D-Bus identifiers
855
289
secret: bytestring; sent verbatim (over TLS) to client
856
290
timeout: datetime.timedelta(); How long from last_checked_ok
857
291
until this client is disabled
858
extended_timeout: extra long timeout when secret has been sent
859
292
runtime_expansions: Allowed attributes for runtime expansion.
860
expires: datetime.datetime(); time (UTC) when a client will be
861
disabled, or None
862
server_settings: The server_settings dict from main()
863
293
"""
864
294
865
295
runtime_expansions = ("approval_delay", "approval_duration",
866
"created", "enabled", "expires", "key_id",
867
"fingerprint", "host", "interval",
868
"last_approval_request", "last_checked_ok",
296
"created", "enabled", "fingerprint",
297
"host", "interval", "last_checked_ok",
869
298
"last_enabled", "name", "timeout")
870
client_defaults = {
871
"timeout": "PT5M",
872
"extended_timeout": "PT15M",
873
"interval": "PT2M",
874
"checker": "fping -q -- %%(host)s",
875
"host": "",
876
"approval_delay": "PT0S",
877
"approval_duration": "PT1S",
878
"approved_by_default": "True",
879
"enabled": "True",
880
}
881
299
882
300
@staticmethod
883
def config_parser(config):
884
"""Construct a new dict of client settings of this form:
885
{ client_name: {setting_name: value, ...}, ...}
886
with exceptions for any special settings as defined above.
887
NOTE: Must be a pure function. Must return the same result
888
value given the same arguments.
889
"""
890
settings = {}
891
for client_name in config.sections():
892
section = dict(config.items(client_name))
893
client = settings[client_name] = {}
894
895
client["host"] = section["host"]
896
# Reformat values from string types to Python types
897
client["approved_by_default"] = config.getboolean(
898
client_name, "approved_by_default")
899
client["enabled"] = config.getboolean(client_name,
900
"enabled")
901
902
# Uppercase and remove spaces from key_id and fingerprint
903
# for later comparison purposes with return value from the
904
# key_id() and fingerprint() functions
905
client["key_id"] = (section.get("key_id", "").upper()
906
.replace(" ", ""))
907
client["fingerprint"] = (section["fingerprint"].upper()
908
.replace(" ", ""))
909
if "secret" in section:
910
client["secret"] = codecs.decode(section["secret"]
911
.encode("utf-8"),
912
"base64")
913
elif "secfile" in section:
914
with open(os.path.expanduser(os.path.expandvars
915
(section["secfile"])),
916
"rb") as secfile:
917
client["secret"] = secfile.read()
918
else:
919
raise TypeError("No secret or secfile for section {}"
920
.format(section))
921
client["timeout"] = string_to_delta(section["timeout"])
922
client["extended_timeout"] = string_to_delta(
923
section["extended_timeout"])
924
client["interval"] = string_to_delta(section["interval"])
925
client["approval_delay"] = string_to_delta(
926
section["approval_delay"])
927
client["approval_duration"] = string_to_delta(
928
section["approval_duration"])
929
client["checker_command"] = section["checker"]
930
client["last_approval_request"] = None
931
client["last_checked_ok"] = None
932
client["last_checker_status"] = -2
933
934
return settings
935
936
def __init__(self, settings, name=None, server_settings=None):
301
def _timedelta_to_milliseconds(td):
302
"Convert a datetime.timedelta() to milliseconds"
303
return ((td.days * 24 * 60 * 60 * 1000)
304
+ (td.seconds * 1000)
305
+ (td.microseconds // 1000))
306
307
def timeout_milliseconds(self):
308
"Return the 'timeout' attribute in milliseconds"
309
return self._timedelta_to_milliseconds(self.timeout)
310
311
def interval_milliseconds(self):
312
"Return the 'interval' attribute in milliseconds"
313
return self._timedelta_to_milliseconds(self.interval)
314
315
def approval_delay_milliseconds(self):
316
return self._timedelta_to_milliseconds(self.approval_delay)
317
318
def __init__(self, name = None, disable_hook=None, config=None):
319
"""Note: the 'checker' key in 'config' sets the
320
'checker_command' attribute and *not* the 'checker'
321
attribute."""
937
322
self.name = name
938
if server_settings is None:
939
server_settings = {}
940
self.server_settings = server_settings
941
# adding all client settings
942
for setting, value in settings.items():
943
setattr(self, setting, value)
944
945
if self.enabled:
946
if not hasattr(self, "last_enabled"):
947
self.last_enabled = datetime.datetime.utcnow()
948
if not hasattr(self, "expires"):
949
self.expires = (datetime.datetime.utcnow()
950
+ self.timeout)
951
else:
952
self.last_enabled = None
953
self.expires = None
954
323
if config is None:
324
config = {}
955
325
logger.debug("Creating client %r", self.name)
956
logger.debug(" Key ID: %s", self.key_id)
326
# Uppercase and remove spaces from fingerprint for later
327
# comparison purposes with return value from the fingerprint()
328
# function
329
self.fingerprint = (config["fingerprint"].upper()
330
.replace(" ", ""))
957
331
logger.debug(" Fingerprint: %s", self.fingerprint)
958
self.created = settings.get("created",
959
datetime.datetime.utcnow())
960
961
# attributes specific for this server instance
332
if "secret" in config:
333
self.secret = config["secret"].decode("base64")
334
elif "secfile" in config:
335
with open(os.path.expanduser(os.path.expandvars
336
(config["secfile"])),
337
"rb") as secfile:
338
self.secret = secfile.read()
339
else:
340
raise TypeError("No secret or secfile for client %s"
341
% self.name)
342
self.host = config.get("host", "")
343
self.created = datetime.datetime.utcnow()
344
self.enabled = False
345
self.last_approval_request = None
346
self.last_enabled = None
347
self.last_checked_ok = None
348
self.timeout = string_to_delta(config["timeout"])
349
self.interval = string_to_delta(config["interval"])
350
self.disable_hook = disable_hook
962
351
self.checker = None
963
352
self.checker_initiator_tag = None
964
353
self.disable_initiator_tag = None
965
354
self.checker_callback_tag = None
355
self.checker_command = config["checker"]
966
356
self.current_checker_command = None
967
self.approved = None
357
self.last_connect = None
358
self._approved = None
359
self.approved_by_default = config.get("approved_by_default",
360
True)
968
361
self.approvals_pending = 0
969
self.changedstate = multiprocessing_manager.Condition(
970
multiprocessing_manager.Lock())
971
self.client_structure = [attr
972
for attr in self.__dict__.keys()
973
if not attr.startswith("_")]
974
self.client_structure.append("client_structure")
975
976
for name, t in inspect.getmembers(
977
type(self), lambda obj: isinstance(obj, property)):
978
if not name.startswith("_"):
979
self.client_structure.append(name)
980
981
# Send notice to process children that client state has changed
362
self.approval_delay = string_to_delta(
363
config["approval_delay"])
364
self.approval_duration = string_to_delta(
365
config["approval_duration"])
366
self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())
367
982
368
def send_changedstate(self):
983
with self.changedstate:
984
self.changedstate.notify_all()
985
369
self.changedstate.acquire()
370
self.changedstate.notify_all()
371
self.changedstate.release()
372
986
373
def enable(self):
987
374
"""Start this client's checker and timeout hooks"""
988
375
if getattr(self, "enabled", False):
989
376
# Already enabled
990
377
return
991
self.expires = datetime.datetime.utcnow() + self.timeout
992
self.enabled = True
378
self.send_changedstate()
993
379
self.last_enabled = datetime.datetime.utcnow()
994
self.init_checker()
995
self.send_changedstate()
996
380
# Schedule a new checker to be started an 'interval' from now,
381
# and every interval from then on.
382
self.checker_initiator_tag = (gobject.timeout_add
383
(self.interval_milliseconds(),
384
self.start_checker))
385
# Schedule a disable() when 'timeout' has passed
386
self.disable_initiator_tag = (gobject.timeout_add
387
(self.timeout_milliseconds(),
388
self.disable))
389
self.enabled = True
390
# Also start a new checker *right now*.
391
self.start_checker()
392
997
393
def disable(self, quiet=True):
998
394
"""Disable this client."""
999
395
if not getattr(self, "enabled", False):
1000
396
return False
1001
397
if not quiet:
398
self.send_changedstate()
399
if not quiet:
1002
400
logger.info("Disabling client %s", self.name)
1003
if getattr(self, "disable_initiator_tag", None) is not None:
1004
GLib.source_remove(self.disable_initiator_tag)
401
if getattr(self, "disable_initiator_tag", False):
402
gobject.source_remove(self.disable_initiator_tag)
1005
403
self.disable_initiator_tag = None
1006
self.expires = None
1007
if getattr(self, "checker_initiator_tag", None) is not None:
1008
GLib.source_remove(self.checker_initiator_tag)
404
if getattr(self, "checker_initiator_tag", False):
405
gobject.source_remove(self.checker_initiator_tag)
1009
406
self.checker_initiator_tag = None
1010
407
self.stop_checker()
408
if self.disable_hook:
409
self.disable_hook(self)
1011
410
self.enabled = False
1012
if not quiet:
1013
self.send_changedstate()
1014
# Do not run this again if called by a GLib.timeout_add
411
# Do not run this again if called by a gobject.timeout_add
1015
412
return False
1016
413
1017
414
def __del__(self):
415
self.disable_hook = None
1018
416
self.disable()
1019
1020
def init_checker(self):
1021
# Schedule a new checker to be started an 'interval' from now,
1022
# and every interval from then on.
1023
if self.checker_initiator_tag is not None:
1024
GLib.source_remove(self.checker_initiator_tag)
1025
self.checker_initiator_tag = GLib.timeout_add(
1026
int(self.interval.total_seconds() * 1000),
1027
self.start_checker)
1028
# Schedule a disable() when 'timeout' has passed
1029
if self.disable_initiator_tag is not None:
1030
GLib.source_remove(self.disable_initiator_tag)
1031
self.disable_initiator_tag = GLib.timeout_add(
1032
int(self.timeout.total_seconds() * 1000), self.disable)
1033
# Also start a new checker *right now*.
1034
self.start_checker()
1035
1036
def checker_callback(self, source, condition, connection,
1037
command):
417
418
def checker_callback(self, pid, condition, command):
1038
419
"""The checker has completed, so take appropriate actions."""
1039
420
self.checker_callback_tag = None
1040
421
self.checker = None
1041
# Read return code from connection (see call_pipe)
1042
returncode = connection.recv()
1043
connection.close()
1044
1045
if returncode >= 0:
1046
self.last_checker_status = returncode
1047
self.last_checker_signal = None
1048
if self.last_checker_status == 0:
422
if os.WIFEXITED(condition):
423
exitstatus = os.WEXITSTATUS(condition)
424
if exitstatus == 0:
1049
425
logger.info("Checker for %(name)s succeeded",
1050
426
vars(self))
1051
427
self.checked_ok()
1052
428
else:
1053
logger.info("Checker for %(name)s failed", vars(self))
429
logger.info("Checker for %(name)s failed",
430
vars(self))
1054
431
else:
1055
self.last_checker_status = -1
1056
self.last_checker_signal = -returncode
1057
432
logger.warning("Checker for %(name)s crashed?",
1058
433
vars(self))
1059
return False
1060
434
1061
435
def checked_ok(self):
1062
"""Assert that the client has been seen, alive and well."""
436
"""Bump up the timeout for this client.
437
438
This should only be called when the client has been seen,
439
alive and well.
440
"""
1063
441
self.last_checked_ok = datetime.datetime.utcnow()
1064
self.last_checker_status = 0
1065
self.last_checker_signal = None
1066
self.bump_timeout()
1067
1068
def bump_timeout(self, timeout=None):
1069
"""Bump up the timeout for this client."""
1070
if timeout is None:
1071
timeout = self.timeout
1072
if self.disable_initiator_tag is not None:
1073
GLib.source_remove(self.disable_initiator_tag)
1074
self.disable_initiator_tag = None
1075
if getattr(self, "enabled", False):
1076
self.disable_initiator_tag = GLib.timeout_add(
1077
int(timeout.total_seconds() * 1000), self.disable)
1078
self.expires = datetime.datetime.utcnow() + timeout
1079
442
gobject.source_remove(self.disable_initiator_tag)
443
self.disable_initiator_tag = (gobject.timeout_add
444
(self.timeout_milliseconds(),
445
self.disable))
446
1080
447
def need_approval(self):
1081
448
self.last_approval_request = datetime.datetime.utcnow()
1082
449
1083
450
def start_checker(self):
1084
451
"""Start a new checker subprocess if one is not running.
1085
452
1086
453
If a checker already exists, leave it running and do
1087
454
nothing."""
1088
455
# The reason for not killing a running checker is that if we
1089
# did that, and if a checker (for some reason) started running
1090
# slowly and taking more than 'interval' time, then the client
1091
# would inevitably timeout, since no checker would get a
1092
# chance to run to completion. If we instead leave running
456
# did that, then if a checker (for some reason) started
457
# running slowly and taking more than 'interval' time, the
458
# client would inevitably timeout, since no checker would get
459
# a chance to run to completion. If we instead leave running
1093
460
# checkers alone, the checker would have to take more time
1094
461
# than 'timeout' for the client to be disabled, which is as it
1095
462
# should be.
1096
1097
if self.checker is not None and not self.checker.is_alive():
1098
logger.warning("Checker was not alive; joining")
1099
self.checker.join()
1100
self.checker = None
463
464
# If a checker exists, make sure it is not a zombie
465
try:
466
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
467
except (AttributeError, OSError) as error:
468
if (isinstance(error, OSError)
469
and error.errno != errno.ECHILD):
470
raise error
471
else:
472
if pid:
473
logger.warning("Checker was a zombie")
474
gobject.source_remove(self.checker_callback_tag)
475
self.checker_callback(pid, status,
476
self.current_checker_command)
1101
477
# Start a new checker if needed
1102
478
if self.checker is None:
1103
# Escape attributes for the shell
1104
escaped_attrs = {
1105
attr: re.escape(str(getattr(self, attr)))
1106
for attr in self.runtime_expansions}
1107
479
try:
1108
command = self.checker_command % escaped_attrs
1109
except TypeError as error:
1110
logger.error('Could not format string "%s"',
1111
self.checker_command,
1112
exc_info=error)
1113
return True # Try again later
480
# In case checker_command has exactly one % operator
481
command = self.checker_command % self.host
482
except TypeError:
483
# Escape attributes for the shell
484
escaped_attrs = dict(
485
(attr,
486
re.escape(unicode(str(getattr(self, attr, "")),
487
errors=
488
'replace')))
489
for attr in
490
self.runtime_expansions)
491
492
try:
493
command = self.checker_command % escaped_attrs
494
except TypeError as error:
495
logger.error('Could not format string "%s":'
496
' %s', self.checker_command, error)
497
return True # Try again later
1114
498
self.current_checker_command = command
1115
logger.info("Starting checker %r for %s", command,
1116
self.name)
1117
# We don't need to redirect stdout and stderr, since
1118
# in normal mode, that is already done by daemon(),
1119
# and in debug mode we don't want to. (Stdin is
1120
# always replaced by /dev/null.)
1121
# The exception is when not debugging but nevertheless
1122
# running in the foreground; use the previously
1123
# created wnull.
1124
popen_args = {"close_fds": True,
1125
"shell": True,
1126
"cwd": "/"}
1127
if (not self.server_settings["debug"]
1128
and self.server_settings["foreground"]):
1129
popen_args.update({"stdout": wnull,
1130
"stderr": wnull})
1131
pipe = multiprocessing.Pipe(duplex=False)
1132
self.checker = multiprocessing.Process(
1133
target=call_pipe,
1134
args=(pipe[1], subprocess.call, command),
1135
kwargs=popen_args)
1136
self.checker.start()
1137
self.checker_callback_tag = GLib.io_add_watch(
1138
pipe[0].fileno(), GLib.IO_IN,
1139
self.checker_callback, pipe[0], command)
1140
# Re-run this periodically if run by GLib.timeout_add
499
try:
500
logger.info("Starting checker %r for %s",
501
command, self.name)
502
# We don't need to redirect stdout and stderr, since
503
# in normal mode, that is already done by daemon(),
504
# and in debug mode we don't want to. (Stdin is
505
# always replaced by /dev/null.)
506
self.checker = subprocess.Popen(command,
507
close_fds=True,
508
shell=True, cwd="/")
509
self.checker_callback_tag = (gobject.child_watch_add
510
(self.checker.pid,
511
self.checker_callback,
512
data=command))
513
# The checker may have completed before the gobject
514
# watch was added. Check for this.
515
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
516
if pid:
517
gobject.source_remove(self.checker_callback_tag)
518
self.checker_callback(pid, status, command)
519
except OSError as error:
520
logger.error("Failed to start subprocess: %s",
521
error)
522
# Re-run this periodically if run by gobject.timeout_add
1141
523
return True
1142
524
1143
525
def stop_checker(self):
1144
526
"""Force the checker process, if any, to stop."""
1145
527
if self.checker_callback_tag:
1146
GLib.source_remove(self.checker_callback_tag)
528
gobject.source_remove(self.checker_callback_tag)
1147
529
self.checker_callback_tag = None
1148
530
if getattr(self, "checker", None) is None:
1149
531
return
1150
532
logger.debug("Stopping checker for %(name)s", vars(self))
1151
self.checker.terminate()
533
try:
534
os.kill(self.checker.pid, signal.SIGTERM)
535
#time.sleep(0.5)
536
#if self.checker.poll() is None:
537
# os.kill(self.checker.pid, signal.SIGKILL)
538
except OSError as error:
539
if error.errno != errno.ESRCH: # No such process
540
raise
1152
541
self.checker = None
1153
542
1154
1155
def dbus_service_property(dbus_interface,
1156
signature="v",
1157
access="readwrite",
1158
byte_arrays=False):
543
def dbus_service_property(dbus_interface, signature="v",
544
access="readwrite", byte_arrays=False):
1159
545
"""Decorators for marking methods of a DBusObjectWithProperties to
1160
546
become properties on the D-Bus.
1161
547
1162
548
The decorated method will be called with no arguments by "Get"
1163
549
and with one argument by "Set".
1164
550
1165
551
The parameters, where they are supported, are the same as
1166
552
dbus.service.method, except there is only "signature", since the
1167
553
type from Get() and the type sent to Set() is the same.
1170
556
# "Set" method, so we fail early here:
1171
557
if byte_arrays and signature != "ay":
1172
558
raise ValueError("Byte arrays not supported for non-'ay'"
1173
" signature {!r}".format(signature))
1174
559
" signature %r" % signature)
1175
560
def decorator(func):
1176
561
func._dbus_is_property = True
1177
562
func._dbus_interface = dbus_interface
1180
565
func._dbus_name = func.__name__
1181
566
if func._dbus_name.endswith("_dbus_property"):
1182
567
func._dbus_name = func._dbus_name[:-14]
1183
func._dbus_get_args_options = {'byte_arrays': byte_arrays}
1184
return func
1185
1186
return decorator
1187
1188
1189
def dbus_interface_annotations(dbus_interface):
1190
"""Decorator for marking functions returning interface annotations
1191
1192
Usage:
1193
1194
@dbus_interface_annotations("org.example.Interface")
1195
def _foo(self): # Function name does not matter
1196
return {"org.freedesktop.DBus.Deprecated": "true",
1197
"org.freedesktop.DBus.Property.EmitsChangedSignal":
1198
"false"}
1199
"""
1200
1201
def decorator(func):
1202
func._dbus_is_interface = True
1203
func._dbus_interface = dbus_interface
1204
func._dbus_name = dbus_interface
1205
return func
1206
1207
return decorator
1208
1209
1210
def dbus_annotations(annotations):
1211
"""Decorator to annotate D-Bus methods, signals or properties
1212
Usage:
1213
1214
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
1215
"org.freedesktop.DBus.Property."
1216
"EmitsChangedSignal": "false"})
1217
@dbus_service_property("org.example.Interface", signature="b",
1218
access="r")
1219
def Property_dbus_property(self):
1220
return dbus.Boolean(False)
1221
1222
See also the DBusObjectWithAnnotations class.
1223
"""
1224
1225
def decorator(func):
1226
func._dbus_annotations = annotations
1227
return func
1228
568
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
569
return func
1229
570
return decorator
1230
571
1231
572
1232
573
class DBusPropertyException(dbus.exceptions.DBusException):
1233
574
"""A base class for D-Bus property-related exceptions
1234
575
"""
1235
pass
576
def __unicode__(self):
577
return unicode(str(self))
1236
578
1237
579
1238
580
class DBusPropertyAccessException(DBusPropertyException):
1247
589
pass
1248
590
1249
591
1250
class DBusObjectWithAnnotations(dbus.service.Object):
1251
"""A D-Bus object with annotations.
1252
1253
Classes inheriting from this can use the dbus_annotations
1254
decorator to add annotations to methods or signals.
1255
"""
1256
1257
@staticmethod
1258
def _is_dbus_thing(thing):
1259
"""Returns a function testing if an attribute is a D-Bus thing
1260
1261
If called like _is_dbus_thing("method") it returns a function
1262
suitable for use as predicate to inspect.getmembers().
1263
"""
1264
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
1265
False)
1266
1267
def _get_all_dbus_things(self, thing):
1268
"""Returns a generator of (name, attribute) pairs
1269
"""
1270
return ((getattr(athing.__get__(self), "_dbus_name", name),
1271
athing.__get__(self))
1272
for cls in self.__class__.__mro__
1273
for name, athing in
1274
inspect.getmembers(cls, self._is_dbus_thing(thing)))
1275
1276
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1277
out_signature="s",
1278
path_keyword='object_path',
1279
connection_keyword='connection')
1280
def Introspect(self, object_path, connection):
1281
"""Overloading of standard D-Bus method.
1282
1283
Inserts annotation tags on methods and signals.
1284
"""
1285
xmlstring = dbus.service.Object.Introspect(self, object_path,
1286
connection)
1287
try:
1288
document = xml.dom.minidom.parseString(xmlstring)
1289
1290
for if_tag in document.getElementsByTagName("interface"):
1291
# Add annotation tags
1292
for typ in ("method", "signal"):
1293
for tag in if_tag.getElementsByTagName(typ):
1294
annots = dict()
1295
for name, prop in (self.
1296
_get_all_dbus_things(typ)):
1297
if (name == tag.getAttribute("name")
1298
and prop._dbus_interface
1299
== if_tag.getAttribute("name")):
1300
annots.update(getattr(
1301
prop, "_dbus_annotations", {}))
1302
for name, value in annots.items():
1303
ann_tag = document.createElement(
1304
"annotation")
1305
ann_tag.setAttribute("name", name)
1306
ann_tag.setAttribute("value", value)
1307
tag.appendChild(ann_tag)
1308
# Add interface annotation tags
1309
for annotation, value in dict(
1310
itertools.chain.from_iterable(
1311
annotations().items()
1312
for name, annotations
1313
in self._get_all_dbus_things("interface")
1314
if name == if_tag.getAttribute("name")
1315
)).items():
1316
ann_tag = document.createElement("annotation")
1317
ann_tag.setAttribute("name", annotation)
1318
ann_tag.setAttribute("value", value)
1319
if_tag.appendChild(ann_tag)
1320
# Fix argument name for the Introspect method itself
1321
if (if_tag.getAttribute("name")
1322
== dbus.INTROSPECTABLE_IFACE):
1323
for cn in if_tag.getElementsByTagName("method"):
1324
if cn.getAttribute("name") == "Introspect":
1325
for arg in cn.getElementsByTagName("arg"):
1326
if (arg.getAttribute("direction")
1327
== "out"):
1328
arg.setAttribute("name",
1329
"xml_data")
1330
xmlstring = document.toxml("utf-8")
1331
document.unlink()
1332
except (AttributeError, xml.dom.DOMException,
1333
xml.parsers.expat.ExpatError) as error:
1334
logger.error("Failed to override Introspection method",
1335
exc_info=error)
1336
return xmlstring
1337
1338
1339
class DBusObjectWithProperties(DBusObjectWithAnnotations):
592
class DBusObjectWithProperties(dbus.service.Object):
1340
593
"""A D-Bus object with properties.
1341
594
1342
595
Classes inheriting from this can use the dbus_service_property
1343
596
decorator to expose methods as D-Bus properties. It exposes the
1344
597
standard Get(), Set(), and GetAll() methods on the D-Bus.
1345
598
"""
1346
599
600
@staticmethod
601
def _is_dbus_property(obj):
602
return getattr(obj, "_dbus_is_property", False)
603
604
def _get_all_dbus_properties(self):
605
"""Returns a generator of (name, attribute) pairs
606
"""
607
return ((prop._dbus_name, prop)
608
for name, prop in
609
inspect.getmembers(self, self._is_dbus_property))
610
1347
611
def _get_dbus_property(self, interface_name, property_name):
1348
612
"""Returns a bound method if one exists which is a D-Bus
1349
613
property with the specified name and interface.
1350
614
"""
1351
for cls in self.__class__.__mro__:
1352
for name, value in inspect.getmembers(
1353
cls, self._is_dbus_thing("property")):
1354
if (value._dbus_name == property_name
1355
and value._dbus_interface == interface_name):
1356
return value.__get__(self)
1357
615
for name in (property_name,
616
property_name + "_dbus_property"):
617
prop = getattr(self, name, None)
618
if (prop is None
619
or not self._is_dbus_property(prop)
620
or prop._dbus_name != property_name
621
or (interface_name and prop._dbus_interface
622
and interface_name != prop._dbus_interface)):
623
continue
624
return prop
1358
625
# No such property
1359
raise DBusPropertyNotFound("{}:{}.{}".format(
1360
self.dbus_object_path, interface_name, property_name))
1361
1362
@classmethod
1363
def _get_all_interface_names(cls):
1364
"""Get a sequence of all interfaces supported by an object"""
1365
return (name for name in set(getattr(getattr(x, attr),
1366
"_dbus_interface", None)
1367
for x in (inspect.getmro(cls))
1368
for attr in dir(x))
1369
if name is not None)
1370
1371
@dbus.service.method(dbus.PROPERTIES_IFACE,
1372
in_signature="ss",
626
raise DBusPropertyNotFound(self.dbus_object_path + ":"
627
+ interface_name + "."
628
+ property_name)
629
630
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
1373
631
out_signature="v")
1374
632
def Get(self, interface_name, property_name):
1375
633
"""Standard D-Bus property Get() method, see D-Bus standard.
1381
639
if not hasattr(value, "variant_level"):
1382
640
return value
1383
641
return type(value)(value, variant_level=value.variant_level+1)
1384
642
1385
643
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
1386
644
def Set(self, interface_name, property_name, value):
1387
645
"""Standard D-Bus property Set() method, see D-Bus standard.
1393
651
# The byte_arrays option is not supported yet on
1394
652
# signatures other than "ay".
1395
653
if prop._dbus_signature != "ay":
1396
raise ValueError("Byte arrays not supported for non-"
1397
"'ay' signature {!r}"
1398
.format(prop._dbus_signature))
1399
value = dbus.ByteArray(b''.join(chr(byte)
1400
for byte in value))
654
raise ValueError
655
value = dbus.ByteArray(''.join(unichr(byte)
656
for byte in value))
1401
657
prop(value)
1402
1403
@dbus.service.method(dbus.PROPERTIES_IFACE,
1404
in_signature="s",
658
659
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
1405
660
out_signature="a{sv}")
1406
661
def GetAll(self, interface_name):
1407
662
"""Standard D-Bus property GetAll() method, see D-Bus
1409
664
1410
665
Note: Will not include properties with access="write".
1411
666
"""
1412
properties = {}
1413
for name, prop in self._get_all_dbus_things("property"):
667
all = {}
668
for name, prop in self._get_all_dbus_properties():
1414
669
if (interface_name
1415
670
and interface_name != prop._dbus_interface):
1416
671
# Interface non-empty but did not match
1420
675
continue
1421
676
value = prop()
1422
677
if not hasattr(value, "variant_level"):
1423
properties[name] = value
678
all[name] = value
1424
679
continue
1425
properties[name] = type(value)(
1426
value, variant_level=value.variant_level + 1)
1427
return dbus.Dictionary(properties, signature="sv")
1428
1429
@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
1430
def PropertiesChanged(self, interface_name, changed_properties,
1431
invalidated_properties):
1432
"""Standard D-Bus PropertiesChanged() signal, see D-Bus
1433
standard.
1434
"""
1435
pass
1436
680
all[name] = type(value)(value, variant_level=
681
value.variant_level+1)
682
return dbus.Dictionary(all, signature="sv")
683
1437
684
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1438
685
out_signature="s",
1439
686
path_keyword='object_path',
1440
687
connection_keyword='connection')
1441
688
def Introspect(self, object_path, connection):
1442
"""Overloading of standard D-Bus method.
1443
1444
Inserts property tags and interface annotation tags.
689
"""Standard D-Bus method, overloaded to insert property tags.
1445
690
"""
1446
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1447
object_path,
1448
connection)
691
xmlstring = dbus.service.Object.Introspect(self, object_path,
692
connection)
1449
693
try:
1450
694
document = xml.dom.minidom.parseString(xmlstring)
1451
1452
695
def make_tag(document, name, prop):
1453
696
e = document.createElement("property")
1454
697
e.setAttribute("name", name)
1455
698
e.setAttribute("type", prop._dbus_signature)
1456
699
e.setAttribute("access", prop._dbus_access)
1457
700
return e
1458
1459
701
for if_tag in document.getElementsByTagName("interface"):
1460
# Add property tags
1461
702
for tag in (make_tag(document, name, prop)
1462
703
for name, prop
1463
in self._get_all_dbus_things("property")
704
in self._get_all_dbus_properties()
1464
705
if prop._dbus_interface
1465
706
== if_tag.getAttribute("name")):
1466
707
if_tag.appendChild(tag)
1467
# Add annotation tags for properties
1468
for tag in if_tag.getElementsByTagName("property"):
1469
annots = dict()
1470
for name, prop in self._get_all_dbus_things(
1471
"property"):
1472
if (name == tag.getAttribute("name")
1473
and prop._dbus_interface
1474
== if_tag.getAttribute("name")):
1475
annots.update(getattr(
1476
prop, "_dbus_annotations", {}))
1477
for name, value in annots.items():
1478
ann_tag = document.createElement(
1479
"annotation")
1480
ann_tag.setAttribute("name", name)
1481
ann_tag.setAttribute("value", value)
1482
tag.appendChild(ann_tag)
1483
708
# Add the names to the return values for the
1484
709
# "org.freedesktop.DBus.Properties" methods
1485
710
if (if_tag.getAttribute("name")
1500
725
except (AttributeError, xml.dom.DOMException,
1501
726
xml.parsers.expat.ExpatError) as error:
1502
727
logger.error("Failed to override Introspection method",
1503
exc_info=error)
1504
return xmlstring
1505
1506
1507
try:
1508
dbus.OBJECT_MANAGER_IFACE
1509
except AttributeError:
1510
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1511
1512
1513
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1514
"""A D-Bus object with an ObjectManager.
1515
1516
Classes inheriting from this exposes the standard
1517
GetManagedObjects call and the InterfacesAdded and
1518
InterfacesRemoved signals on the standard
1519
"org.freedesktop.DBus.ObjectManager" interface.
1520
1521
Note: No signals are sent automatically; they must be sent
1522
manually.
1523
"""
1524
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1525
out_signature="a{oa{sa{sv}}}")
1526
def GetManagedObjects(self):
1527
"""This function must be overridden"""
1528
raise NotImplementedError()
1529
1530
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1531
signature="oa{sa{sv}}")
1532
def InterfacesAdded(self, object_path, interfaces_and_properties):
1533
pass
1534
1535
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1536
def InterfacesRemoved(self, object_path, interfaces):
1537
pass
1538
1539
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1540
out_signature="s",
1541
path_keyword='object_path',
1542
connection_keyword='connection')
1543
def Introspect(self, object_path, connection):
1544
"""Overloading of standard D-Bus method.
1545
1546
Override return argument name of GetManagedObjects to be
1547
"objpath_interfaces_and_properties"
1548
"""
1549
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1550
object_path,
1551
connection)
1552
try:
1553
document = xml.dom.minidom.parseString(xmlstring)
1554
1555
for if_tag in document.getElementsByTagName("interface"):
1556
# Fix argument name for the GetManagedObjects method
1557
if (if_tag.getAttribute("name")
1558
== dbus.OBJECT_MANAGER_IFACE):
1559
for cn in if_tag.getElementsByTagName("method"):
1560
if (cn.getAttribute("name")
1561
== "GetManagedObjects"):
1562
for arg in cn.getElementsByTagName("arg"):
1563
if (arg.getAttribute("direction")
1564
== "out"):
1565
arg.setAttribute(
1566
"name",
1567
"objpath_interfaces"
1568
"_and_properties")
1569
xmlstring = document.toxml("utf-8")
1570
document.unlink()
1571
except (AttributeError, xml.dom.DOMException,
1572
xml.parsers.expat.ExpatError) as error:
1573
logger.error("Failed to override Introspection method",
1574
exc_info=error)
1575
return xmlstring
1576
1577
1578
def datetime_to_dbus(dt, variant_level=0):
1579
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1580
if dt is None:
1581
return dbus.String("", variant_level=variant_level)
1582
return dbus.String(dt.isoformat(), variant_level=variant_level)
1583
1584
1585
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1586
"""A class decorator; applied to a subclass of
1587
dbus.service.Object, it will add alternate D-Bus attributes with
1588
interface names according to the "alt_interface_names" mapping.
1589
Usage:
1590
1591
@alternate_dbus_interfaces({"org.example.Interface":
1592
"net.example.AlternateInterface"})
1593
class SampleDBusObject(dbus.service.Object):
1594
@dbus.service.method("org.example.Interface")
1595
def SampleDBusMethod():
1596
pass
1597
1598
The above "SampleDBusMethod" on "SampleDBusObject" will be
1599
reachable via two interfaces: "org.example.Interface" and
1600
"net.example.AlternateInterface", the latter of which will have
1601
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1602
"true", unless "deprecate" is passed with a False value.
1603
1604
This works for methods and signals, and also for D-Bus properties
1605
(from DBusObjectWithProperties) and interfaces (from the
1606
dbus_interface_annotations decorator).
1607
"""
1608
1609
def wrapper(cls):
1610
for orig_interface_name, alt_interface_name in (
1611
alt_interface_names.items()):
1612
attr = {}
1613
interface_names = set()
1614
# Go though all attributes of the class
1615
for attrname, attribute in inspect.getmembers(cls):
1616
# Ignore non-D-Bus attributes, and D-Bus attributes
1617
# with the wrong interface name
1618
if (not hasattr(attribute, "_dbus_interface")
1619
or not attribute._dbus_interface.startswith(
1620
orig_interface_name)):
1621
continue
1622
# Create an alternate D-Bus interface name based on
1623
# the current name
1624
alt_interface = attribute._dbus_interface.replace(
1625
orig_interface_name, alt_interface_name)
1626
interface_names.add(alt_interface)
1627
# Is this a D-Bus signal?
1628
if getattr(attribute, "_dbus_is_signal", False):
1629
# Extract the original non-method undecorated
1630
# function by black magic
1631
if sys.version_info.major == 2:
1632
nonmethod_func = (dict(
1633
zip(attribute.func_code.co_freevars,
1634
attribute.__closure__))
1635
["func"].cell_contents)
1636
else:
1637
nonmethod_func = (dict(
1638
zip(attribute.__code__.co_freevars,
1639
attribute.__closure__))
1640
["func"].cell_contents)
1641
# Create a new, but exactly alike, function
1642
# object, and decorate it to be a new D-Bus signal
1643
# with the alternate D-Bus interface name
1644
new_function = copy_function(nonmethod_func)
1645
new_function = (dbus.service.signal(
1646
alt_interface,
1647
attribute._dbus_signature)(new_function))
1648
# Copy annotations, if any
1649
try:
1650
new_function._dbus_annotations = dict(
1651
attribute._dbus_annotations)
1652
except AttributeError:
1653
pass
1654
1655
# Define a creator of a function to call both the
1656
# original and alternate functions, so both the
1657
# original and alternate signals gets sent when
1658
# the function is called
1659
def fixscope(func1, func2):
1660
"""This function is a scope container to pass
1661
func1 and func2 to the "call_both" function
1662
outside of its arguments"""
1663
1664
@functools.wraps(func2)
1665
def call_both(*args, **kwargs):
1666
"""This function will emit two D-Bus
1667
signals by calling func1 and func2"""
1668
func1(*args, **kwargs)
1669
func2(*args, **kwargs)
1670
# Make wrapper function look like a D-Bus
1671
# signal
1672
for name, attr in inspect.getmembers(func2):
1673
if name.startswith("_dbus_"):
1674
setattr(call_both, name, attr)
1675
1676
return call_both
1677
# Create the "call_both" function and add it to
1678
# the class
1679
attr[attrname] = fixscope(attribute, new_function)
1680
# Is this a D-Bus method?
1681
elif getattr(attribute, "_dbus_is_method", False):
1682
# Create a new, but exactly alike, function
1683
# object. Decorate it to be a new D-Bus method
1684
# with the alternate D-Bus interface name. Add it
1685
# to the class.
1686
attr[attrname] = (
1687
dbus.service.method(
1688
alt_interface,
1689
attribute._dbus_in_signature,
1690
attribute._dbus_out_signature)
1691
(copy_function(attribute)))
1692
# Copy annotations, if any
1693
try:
1694
attr[attrname]._dbus_annotations = dict(
1695
attribute._dbus_annotations)
1696
except AttributeError:
1697
pass
1698
# Is this a D-Bus property?
1699
elif getattr(attribute, "_dbus_is_property", False):
1700
# Create a new, but exactly alike, function
1701
# object, and decorate it to be a new D-Bus
1702
# property with the alternate D-Bus interface
1703
# name. Add it to the class.
1704
attr[attrname] = (dbus_service_property(
1705
alt_interface, attribute._dbus_signature,
1706
attribute._dbus_access,
1707
attribute._dbus_get_args_options
1708
["byte_arrays"])
1709
(copy_function(attribute)))
1710
# Copy annotations, if any
1711
try:
1712
attr[attrname]._dbus_annotations = dict(
1713
attribute._dbus_annotations)
1714
except AttributeError:
1715
pass
1716
# Is this a D-Bus interface?
1717
elif getattr(attribute, "_dbus_is_interface", False):
1718
# Create a new, but exactly alike, function
1719
# object. Decorate it to be a new D-Bus interface
1720
# with the alternate D-Bus interface name. Add it
1721
# to the class.
1722
attr[attrname] = (
1723
dbus_interface_annotations(alt_interface)
1724
(copy_function(attribute)))
1725
if deprecate:
1726
# Deprecate all alternate interfaces
1727
iname = "_AlternateDBusNames_interface_annotation{}"
1728
for interface_name in interface_names:
1729
1730
@dbus_interface_annotations(interface_name)
1731
def func(self):
1732
return {"org.freedesktop.DBus.Deprecated":
1733
"true"}
1734
# Find an unused name
1735
for aname in (iname.format(i)
1736
for i in itertools.count()):
1737
if aname not in attr:
1738
attr[aname] = func
1739
break
1740
if interface_names:
1741
# Replace the class with a new subclass of it with
1742
# methods, signals, etc. as created above.
1743
if sys.version_info.major == 2:
1744
cls = type(b"{}Alternate".format(cls.__name__),
1745
(cls, ), attr)
1746
else:
1747
cls = type("{}Alternate".format(cls.__name__),
1748
(cls, ), attr)
1749
return cls
1750
1751
return wrapper
1752
1753
1754
@alternate_dbus_interfaces({"se.recompile.Mandos":
1755
"se.bsnet.fukt.Mandos"})
728
error)
729
return xmlstring
730
731
1756
732
class ClientDBus(Client, DBusObjectWithProperties):
1757
733
"""A Client class using D-Bus
1758
734
1759
735
Attributes:
1760
736
dbus_object_path: dbus.ObjectPath
1761
737
bus: dbus.SystemBus()
1762
738
"""
1763
739
1764
740
runtime_expansions = (Client.runtime_expansions
1765
+ ("dbus_object_path", ))
1766
1767
_interface = "se.recompile.Mandos.Client"
1768
741
+ ("dbus_object_path",))
742
1769
743
# dbus.service.Object doesn't use super(), so we can't either.
1770
1771
def __init__(self, bus=None, *args, **kwargs):
744
745
def __init__(self, bus = None, *args, **kwargs):
746
self._approvals_pending = 0
1772
747
self.bus = bus
1773
748
Client.__init__(self, *args, **kwargs)
1774
749
# Only now, when this client is initialized, can it show up on
1775
750
# the D-Bus
1776
client_object_name = str(self.name).translate(
751
client_object_name = unicode(self.name).translate(
1777
752
{ord("."): ord("_"),
1778
753
ord("-"): ord("_")})
1779
self.dbus_object_path = dbus.ObjectPath(
1780
"/clients/" + client_object_name)
754
self.dbus_object_path = (dbus.ObjectPath
755
("/clients/" + client_object_name))
1781
756
DBusObjectWithProperties.__init__(self, self.bus,
1782
757
self.dbus_object_path)
1783
1784
def notifychangeproperty(transform_func, dbus_name,
1785
type_func=lambda x: x,
1786
variant_level=1,
1787
invalidate_only=False,
1788
_interface=_interface):
1789
""" Modify a variable so that it's a property which announces
1790
its changes to DBus.
1791
1792
transform_fun: Function that takes a value and a variant_level
1793
and transforms it to a D-Bus type.
1794
dbus_name: D-Bus name of the variable
1795
type_func: Function that transform the value before sending it
1796
to the D-Bus. Default: no transform
1797
variant_level: D-Bus variant level. Default: 1
1798
"""
1799
attrname = "_{}".format(dbus_name)
1800
1801
def setter(self, value):
1802
if hasattr(self, "dbus_object_path"):
1803
if (not hasattr(self, attrname) or
1804
type_func(getattr(self, attrname, None))
1805
!= type_func(value)):
1806
if invalidate_only:
1807
self.PropertiesChanged(
1808
_interface, dbus.Dictionary(),
1809
dbus.Array((dbus_name, )))
1810
else:
1811
dbus_value = transform_func(
1812
type_func(value),
1813
variant_level=variant_level)
1814
self.PropertyChanged(dbus.String(dbus_name),
1815
dbus_value)
1816
self.PropertiesChanged(
1817
_interface,
1818
dbus.Dictionary({dbus.String(dbus_name):
1819
dbus_value}),
1820
dbus.Array())
1821
setattr(self, attrname, value)
1822
1823
return property(lambda self: getattr(self, attrname), setter)
1824
1825
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1826
approvals_pending = notifychangeproperty(dbus.Boolean,
1827
"ApprovalPending",
1828
type_func=bool)
1829
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1830
last_enabled = notifychangeproperty(datetime_to_dbus,
1831
"LastEnabled")
1832
checker = notifychangeproperty(
1833
dbus.Boolean, "CheckerRunning",
1834
type_func=lambda checker: checker is not None)
1835
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1836
"LastCheckedOK")
1837
last_checker_status = notifychangeproperty(dbus.Int16,
1838
"LastCheckerStatus")
1839
last_approval_request = notifychangeproperty(
1840
datetime_to_dbus, "LastApprovalRequest")
1841
approved_by_default = notifychangeproperty(dbus.Boolean,
1842
"ApprovedByDefault")
1843
approval_delay = notifychangeproperty(
1844
dbus.UInt64, "ApprovalDelay",
1845
type_func=lambda td: td.total_seconds() * 1000)
1846
approval_duration = notifychangeproperty(
1847
dbus.UInt64, "ApprovalDuration",
1848
type_func=lambda td: td.total_seconds() * 1000)
1849
host = notifychangeproperty(dbus.String, "Host")
1850
timeout = notifychangeproperty(
1851
dbus.UInt64, "Timeout",
1852
type_func=lambda td: td.total_seconds() * 1000)
1853
extended_timeout = notifychangeproperty(
1854
dbus.UInt64, "ExtendedTimeout",
1855
type_func=lambda td: td.total_seconds() * 1000)
1856
interval = notifychangeproperty(
1857
dbus.UInt64, "Interval",
1858
type_func=lambda td: td.total_seconds() * 1000)
1859
checker_command = notifychangeproperty(dbus.String, "Checker")
1860
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1861
invalidate_only=True)
1862
1863
del notifychangeproperty
1864
758
759
def _get_approvals_pending(self):
760
return self._approvals_pending
761
def _set_approvals_pending(self, value):
762
old_value = self._approvals_pending
763
self._approvals_pending = value
764
bval = bool(value)
765
if (hasattr(self, "dbus_object_path")
766
and bval is not bool(old_value)):
767
dbus_bool = dbus.Boolean(bval, variant_level=1)
768
self.PropertyChanged(dbus.String("ApprovalPending"),
769
dbus_bool)
770
771
approvals_pending = property(_get_approvals_pending,
772
_set_approvals_pending)
773
del _get_approvals_pending, _set_approvals_pending
774
775
@staticmethod
776
def _datetime_to_dbus(dt, variant_level=0):
777
"""Convert a UTC datetime.datetime() to a D-Bus type."""
778
return dbus.String(dt.isoformat(),
779
variant_level=variant_level)
780
781
def enable(self):
782
oldstate = getattr(self, "enabled", False)
783
r = Client.enable(self)
784
if oldstate != self.enabled:
785
# Emit D-Bus signals
786
self.PropertyChanged(dbus.String("Enabled"),
787
dbus.Boolean(True, variant_level=1))
788
self.PropertyChanged(
789
dbus.String("LastEnabled"),
790
self._datetime_to_dbus(self.last_enabled,
791
variant_level=1))
792
return r
793
794
def disable(self, quiet = False):
795
oldstate = getattr(self, "enabled", False)
796
r = Client.disable(self, quiet=quiet)
797
if not quiet and oldstate != self.enabled:
798
# Emit D-Bus signal
799
self.PropertyChanged(dbus.String("Enabled"),
800
dbus.Boolean(False, variant_level=1))
801
return r
802
1865
803
def __del__(self, *args, **kwargs):
1866
804
try:
1867
805
self.remove_from_connection()
1870
808
if hasattr(DBusObjectWithProperties, "__del__"):
1871
809
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1872
810
Client.__del__(self, *args, **kwargs)
1873
1874
def checker_callback(self, source, condition,
1875
connection, command, *args, **kwargs):
1876
ret = Client.checker_callback(self, source, condition,
1877
connection, command, *args,
1878
**kwargs)
1879
exitstatus = self.last_checker_status
1880
if exitstatus >= 0:
811
812
def checker_callback(self, pid, condition, command,
813
*args, **kwargs):
814
self.checker_callback_tag = None
815
self.checker = None
816
# Emit D-Bus signal
817
self.PropertyChanged(dbus.String("CheckerRunning"),
818
dbus.Boolean(False, variant_level=1))
819
if os.WIFEXITED(condition):
820
exitstatus = os.WEXITSTATUS(condition)
1881
821
# Emit D-Bus signal
1882
822
self.CheckerCompleted(dbus.Int16(exitstatus),
1883
# This is specific to GNU libC
1884
dbus.Int64(exitstatus << 8),
823
dbus.Int64(condition),
1885
824
dbus.String(command))
1886
825
else:
1887
826
# Emit D-Bus signal
1888
827
self.CheckerCompleted(dbus.Int16(-1),
1889
dbus.Int64(
1890
# This is specific to GNU libC
1891
(exitstatus << 8)
1892
| self.last_checker_signal),
828
dbus.Int64(condition),
1893
829
dbus.String(command))
1894
return ret
1895
830
831
return Client.checker_callback(self, pid, condition, command,
832
*args, **kwargs)
833
834
def checked_ok(self, *args, **kwargs):
835
Client.checked_ok(self, *args, **kwargs)
836
# Emit D-Bus signal
837
self.PropertyChanged(
838
dbus.String("LastCheckedOK"),
839
(self._datetime_to_dbus(self.last_checked_ok,
840
variant_level=1)))
841
842
def need_approval(self, *args, **kwargs):
843
r = Client.need_approval(self, *args, **kwargs)
844
# Emit D-Bus signal
845
self.PropertyChanged(
846
dbus.String("LastApprovalRequest"),
847
(self._datetime_to_dbus(self.last_approval_request,
848
variant_level=1)))
849
return r
850
1896
851
def start_checker(self, *args, **kwargs):
1897
old_checker_pid = getattr(self.checker, "pid", None)
852
old_checker = self.checker
853
if self.checker is not None:
854
old_checker_pid = self.checker.pid
855
else:
856
old_checker_pid = None
1898
857
r = Client.start_checker(self, *args, **kwargs)
1899
858
# Only if new checker process was started
1900
859
if (self.checker is not None
1901
860
and old_checker_pid != self.checker.pid):
1902
861
# Emit D-Bus signal
1903
862
self.CheckerStarted(self.current_checker_command)
863
self.PropertyChanged(
864
dbus.String("CheckerRunning"),
865
dbus.Boolean(True, variant_level=1))
866
return r
867
868
def stop_checker(self, *args, **kwargs):
869
old_checker = getattr(self, "checker", None)
870
r = Client.stop_checker(self, *args, **kwargs)
871
if (old_checker is not None
872
and getattr(self, "checker", None) is None):
873
self.PropertyChanged(dbus.String("CheckerRunning"),
874
dbus.Boolean(False, variant_level=1))
1904
875
return r
1905
876
1906
877
def _reset_approved(self):
1907
self.approved = None
878
self._approved = None
1908
879
return False
1909
880
1910
881
def approve(self, value=True):
1911
self.approved = value
1912
GLib.timeout_add(int(self.approval_duration.total_seconds()
1913
* 1000), self._reset_approved)
1914
882
self.send_changedstate()
1915
1916
# D-Bus methods, signals & properties
1917
1918
# Interfaces
1919
1920
# Signals
1921
883
self._approved = value
884
gobject.timeout_add(self._timedelta_to_milliseconds
885
(self.approval_duration),
886
self._reset_approved)
887
888
889
## D-Bus methods, signals & properties
890
_interface = "se.bsnet.fukt.Mandos.Client"
891
892
## Signals
893
1922
894
# CheckerCompleted - signal
1923
895
@dbus.service.signal(_interface, signature="nxs")
1924
896
def CheckerCompleted(self, exitcode, waitstatus, command):
1925
897
"D-Bus signal"
1926
898
pass
1927
899
1928
900
# CheckerStarted - signal
1929
901
@dbus.service.signal(_interface, signature="s")
1930
902
def CheckerStarted(self, command):
1931
903
"D-Bus signal"
1932
904
pass
1933
905
1934
906
# PropertyChanged - signal
1935
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1936
907
@dbus.service.signal(_interface, signature="sv")
1937
908
def PropertyChanged(self, property, value):
1938
909
"D-Bus signal"
1939
910
pass
1940
911
1941
912
# GotSecret - signal
1942
913
@dbus.service.signal(_interface)
1943
914
def GotSecret(self):
1946
917
server to mandos-client
1947
918
"""
1948
919
pass
1949
920
1950
921
# Rejected - signal
1951
922
@dbus.service.signal(_interface, signature="s")
1952
923
def Rejected(self, reason):
1953
924
"D-Bus signal"
1954
925
pass
1955
926
1956
927
# NeedApproval - signal
1957
928
@dbus.service.signal(_interface, signature="tb")
1958
929
def NeedApproval(self, timeout, default):
1959
930
"D-Bus signal"
1960
931
return self.need_approval()
1961
1962
# Methods
1963
932
933
## Methods
934
1964
935
# Approve - method
1965
936
@dbus.service.method(_interface, in_signature="b")
1966
937
def Approve(self, value):
1967
938
self.approve(value)
1968
939
1969
940
# CheckedOK - method
1970
941
@dbus.service.method(_interface)
1971
942
def CheckedOK(self):
1972
943
self.checked_ok()
1973
944
1974
945
# Enable - method
1975
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1976
946
@dbus.service.method(_interface)
1977
947
def Enable(self):
1978
948
"D-Bus method"
1979
949
self.enable()
1980
950
1981
951
# StartChecker - method
1982
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1983
952
@dbus.service.method(_interface)
1984
953
def StartChecker(self):
1985
954
"D-Bus method"
1986
955
self.start_checker()
1987
956
1988
957
# Disable - method
1989
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1990
958
@dbus.service.method(_interface)
1991
959
def Disable(self):
1992
960
"D-Bus method"
1993
961
self.disable()
1994
962
1995
963
# StopChecker - method
1996
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1997
964
@dbus.service.method(_interface)
1998
965
def StopChecker(self):
1999
966
self.stop_checker()
2000
2001
# Properties
2002
967
968
## Properties
969
2003
970
# ApprovalPending - property
2004
971
@dbus_service_property(_interface, signature="b", access="read")
2005
972
def ApprovalPending_dbus_property(self):
2006
973
return dbus.Boolean(bool(self.approvals_pending))
2007
974
2008
975
# ApprovedByDefault - property
2009
@dbus_service_property(_interface,
2010
signature="b",
976
@dbus_service_property(_interface, signature="b",
2011
977
access="readwrite")
2012
978
def ApprovedByDefault_dbus_property(self, value=None):
2013
979
if value is None: # get
2014
980
return dbus.Boolean(self.approved_by_default)
2015
981
self.approved_by_default = bool(value)
2016
982
# Emit D-Bus signal
983
self.PropertyChanged(dbus.String("ApprovedByDefault"),
984
dbus.Boolean(value, variant_level=1))
985
2017
986
# ApprovalDelay - property
2018
@dbus_service_property(_interface,
2019
signature="t",
987
@dbus_service_property(_interface, signature="t",
2020
988
access="readwrite")
2021
989
def ApprovalDelay_dbus_property(self, value=None):
2022
990
if value is None: # get
2023
return dbus.UInt64(self.approval_delay.total_seconds()
2024
* 1000)
991
return dbus.UInt64(self.approval_delay_milliseconds())
2025
992
self.approval_delay = datetime.timedelta(0, 0, 0, value)
2026
993
# Emit D-Bus signal
994
self.PropertyChanged(dbus.String("ApprovalDelay"),
995
dbus.UInt64(value, variant_level=1))
996
2027
997
# ApprovalDuration - property
2028
@dbus_service_property(_interface,
2029
signature="t",
998
@dbus_service_property(_interface, signature="t",
2030
999
access="readwrite")
2031
1000
def ApprovalDuration_dbus_property(self, value=None):
2032
1001
if value is None: # get
2033
return dbus.UInt64(self.approval_duration.total_seconds()
2034
* 1000)
1002
return dbus.UInt64(self._timedelta_to_milliseconds(
1003
self.approval_duration))
2035
1004
self.approval_duration = datetime.timedelta(0, 0, 0, value)
2036
1005
# Emit D-Bus signal
1006
self.PropertyChanged(dbus.String("ApprovalDuration"),
1007
dbus.UInt64(value, variant_level=1))
1008
2037
1009
# Name - property
2038
@dbus_annotations(
2039
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2040
1010
@dbus_service_property(_interface, signature="s", access="read")
2041
1011
def Name_dbus_property(self):
2042
1012
return dbus.String(self.name)
2043
2044
# KeyID - property
2045
@dbus_annotations(
2046
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2047
@dbus_service_property(_interface, signature="s", access="read")
2048
def KeyID_dbus_property(self):
2049
return dbus.String(self.key_id)
2050
1013
2051
1014
# Fingerprint - property
2052
@dbus_annotations(
2053
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2054
1015
@dbus_service_property(_interface, signature="s", access="read")
2055
1016
def Fingerprint_dbus_property(self):
2056
1017
return dbus.String(self.fingerprint)
2057
1018
2058
1019
# Host - property
2059
@dbus_service_property(_interface,
2060
signature="s",
1020
@dbus_service_property(_interface, signature="s",
2061
1021
access="readwrite")
2062
1022
def Host_dbus_property(self, value=None):
2063
1023
if value is None: # get
2064
1024
return dbus.String(self.host)
2065
self.host = str(value)
2066
1025
self.host = value
1026
# Emit D-Bus signal
1027
self.PropertyChanged(dbus.String("Host"),
1028
dbus.String(value, variant_level=1))
1029
2067
1030
# Created - property
2068
@dbus_annotations(
2069
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2070
1031
@dbus_service_property(_interface, signature="s", access="read")
2071
1032
def Created_dbus_property(self):
2072
return datetime_to_dbus(self.created)
2073
1033
return dbus.String(self._datetime_to_dbus(self.created))
1034
2074
1035
# LastEnabled - property
2075
1036
@dbus_service_property(_interface, signature="s", access="read")
2076
1037
def LastEnabled_dbus_property(self):
2077
return datetime_to_dbus(self.last_enabled)
2078
1038
if self.last_enabled is None:
1039
return dbus.String("")
1040
return dbus.String(self._datetime_to_dbus(self.last_enabled))
1041
2079
1042
# Enabled - property
2080
@dbus_service_property(_interface,
2081
signature="b",
1043
@dbus_service_property(_interface, signature="b",
2082
1044
access="readwrite")
2083
1045
def Enabled_dbus_property(self, value=None):
2084
1046
if value is None: # get
2087
1049
self.enable()
2088
1050
else:
2089
1051
self.disable()
2090
1052
2091
1053
# LastCheckedOK - property
2092
@dbus_service_property(_interface,
2093
signature="s",
1054
@dbus_service_property(_interface, signature="s",
2094
1055
access="readwrite")
2095
1056
def LastCheckedOK_dbus_property(self, value=None):
2096
1057
if value is not None:
2097
1058
self.checked_ok()
2098
1059
return
2099
return datetime_to_dbus(self.last_checked_ok)
2100
2101
# LastCheckerStatus - property
2102
@dbus_service_property(_interface, signature="n", access="read")
2103
def LastCheckerStatus_dbus_property(self):
2104
return dbus.Int16(self.last_checker_status)
2105
2106
# Expires - property
2107
@dbus_service_property(_interface, signature="s", access="read")
2108
def Expires_dbus_property(self):
2109
return datetime_to_dbus(self.expires)
2110
1060
if self.last_checked_ok is None:
1061
return dbus.String("")
1062
return dbus.String(self._datetime_to_dbus(self
1063
.last_checked_ok))
1064
2111
1065
# LastApprovalRequest - property
2112
1066
@dbus_service_property(_interface, signature="s", access="read")
2113
1067
def LastApprovalRequest_dbus_property(self):
2114
return datetime_to_dbus(self.last_approval_request)
2115
1068
if self.last_approval_request is None:
1069
return dbus.String("")
1070
return dbus.String(self.
1071
_datetime_to_dbus(self
1072
.last_approval_request))
1073
2116
1074
# Timeout - property
2117
@dbus_service_property(_interface,
2118
signature="t",
1075
@dbus_service_property(_interface, signature="t",
2119
1076
access="readwrite")
2120
1077
def Timeout_dbus_property(self, value=None):
2121
1078
if value is None: # get
2122
return dbus.UInt64(self.timeout.total_seconds() * 1000)
2123
old_timeout = self.timeout
1079
return dbus.UInt64(self.timeout_milliseconds())
2124
1080
self.timeout = datetime.timedelta(0, 0, 0, value)
2125
# Reschedule disabling
2126
if self.enabled:
2127
now = datetime.datetime.utcnow()
2128
self.expires += self.timeout - old_timeout
2129
if self.expires <= now:
2130
# The timeout has passed
2131
self.disable()
2132
else:
2133
if (getattr(self, "disable_initiator_tag", None)
2134
is None):
2135
return
2136
GLib.source_remove(self.disable_initiator_tag)
2137
self.disable_initiator_tag = GLib.timeout_add(
2138
int((self.expires - now).total_seconds() * 1000),
2139
self.disable)
2140
2141
# ExtendedTimeout - property
2142
@dbus_service_property(_interface,
2143
signature="t",
2144
access="readwrite")
2145
def ExtendedTimeout_dbus_property(self, value=None):
2146
if value is None: # get
2147
return dbus.UInt64(self.extended_timeout.total_seconds()
2148
* 1000)
2149
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
2150
1081
# Emit D-Bus signal
1082
self.PropertyChanged(dbus.String("Timeout"),
1083
dbus.UInt64(value, variant_level=1))
1084
if getattr(self, "disable_initiator_tag", None) is None:
1085
return
1086
# Reschedule timeout
1087
gobject.source_remove(self.disable_initiator_tag)
1088
self.disable_initiator_tag = None
1089
time_to_die = (self.
1090
_timedelta_to_milliseconds((self
1091
.last_checked_ok
1092
+ self.timeout)
1093
- datetime.datetime
1094
.utcnow()))
1095
if time_to_die <= 0:
1096
# The timeout has passed
1097
self.disable()
1098
else:
1099
self.disable_initiator_tag = (gobject.timeout_add
1100
(time_to_die, self.disable))
1101
2151
1102
# Interval - property
2152
@dbus_service_property(_interface,
2153
signature="t",
1103
@dbus_service_property(_interface, signature="t",
2154
1104
access="readwrite")
2155
1105
def Interval_dbus_property(self, value=None):
2156
1106
if value is None: # get
2157
return dbus.UInt64(self.interval.total_seconds() * 1000)
1107
return dbus.UInt64(self.interval_milliseconds())
2158
1108
self.interval = datetime.timedelta(0, 0, 0, value)
1109
# Emit D-Bus signal
1110
self.PropertyChanged(dbus.String("Interval"),
1111
dbus.UInt64(value, variant_level=1))
2159
1112
if getattr(self, "checker_initiator_tag", None) is None:
2160
1113
return
2161
if self.enabled:
2162
# Reschedule checker run
2163
GLib.source_remove(self.checker_initiator_tag)
2164
self.checker_initiator_tag = GLib.timeout_add(
2165
value, self.start_checker)
2166
self.start_checker() # Start one now, too
1114
# Reschedule checker run
1115
gobject.source_remove(self.checker_initiator_tag)
1116
self.checker_initiator_tag = (gobject.timeout_add
1117
(value, self.start_checker))
1118
self.start_checker() # Start one now, too
2167
1119
2168
1120
# Checker - property
2169
@dbus_service_property(_interface,
2170
signature="s",
1121
@dbus_service_property(_interface, signature="s",
2171
1122
access="readwrite")
2172
1123
def Checker_dbus_property(self, value=None):
2173
1124
if value is None: # get
2174
1125
return dbus.String(self.checker_command)
2175
self.checker_command = str(value)
2176
1126
self.checker_command = value
1127
# Emit D-Bus signal
1128
self.PropertyChanged(dbus.String("Checker"),
1129
dbus.String(self.checker_command,
1130
variant_level=1))
1131
2177
1132
# CheckerRunning - property
2178
@dbus_service_property(_interface,
2179
signature="b",
1133
@dbus_service_property(_interface, signature="b",
2180
1134
access="readwrite")
2181
1135
def CheckerRunning_dbus_property(self, value=None):
2182
1136
if value is None: # get
2185
1139
self.start_checker()
2186
1140
else:
2187
1141
self.stop_checker()
2188
1142
2189
1143
# ObjectPath - property
2190
@dbus_annotations(
2191
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
2192
"org.freedesktop.DBus.Deprecated": "true"})
2193
1144
@dbus_service_property(_interface, signature="o", access="read")
2194
1145
def ObjectPath_dbus_property(self):
2195
return self.dbus_object_path # is already a dbus.ObjectPath
2196
1146
return self.dbus_object_path # is already a dbus.ObjectPath
1147
2197
1148
# Secret = property
2198
@dbus_annotations(
2199
{"org.freedesktop.DBus.Property.EmitsChangedSignal":
2200
"invalidates"})
2201
@dbus_service_property(_interface,
2202
signature="ay",
2203
access="write",
2204
byte_arrays=True)
1149
@dbus_service_property(_interface, signature="ay",
1150
access="write", byte_arrays=True)
2205
1151
def Secret_dbus_property(self, value):
2206
self.secret = bytes(value)
2207
1152
self.secret = str(value)
1153
2208
1154
del _interface
2209
1155
2210
1156
2211
1157
class ProxyClient(object):
2212
def __init__(self, child_pipe, key_id, fpr, address):
1158
def __init__(self, child_pipe, fpr, address):
2213
1159
self._pipe = child_pipe
2214
self._pipe.send(('init', key_id, fpr, address))
1160
self._pipe.send(('init', fpr, address))
2215
1161
if not self._pipe.recv():
2216
raise KeyError(key_id or fpr)
1162
raise KeyError()
2217
1163
2218
1164
def __getattribute__(self, name):
2219
if name == '_pipe':
1165
if(name == '_pipe'):
2220
1166
return super(ProxyClient, self).__getattribute__(name)
2221
1167
self._pipe.send(('getattr', name))
2222
1168
data = self._pipe.recv()
2223
1169
if data[0] == 'data':
2224
1170
return data[1]
2225
1171
if data[0] == 'function':
2226
2227
1172
def func(*args, **kwargs):
2228
1173
self._pipe.send(('funcall', name, args, kwargs))
2229
1174
return self._pipe.recv()[1]
2230
2231
1175
return func
2232
1176
2233
1177
def __setattr__(self, name, value):
2234
if name == '_pipe':
1178
if(name == '_pipe'):
2235
1179
return super(ProxyClient, self).__setattr__(name, value)
2236
1180
self._pipe.send(('setattr', name, value))
2237
1181
2238
1182
2239
1183
class ClientHandler(socketserver.BaseRequestHandler, object):
2240
1184
"""A class to handle client connections.
2241
1185
2242
1186
Instantiated once for each connection to handle it.
2243
1187
Note: This will run in its own forked process."""
2244
1188
2245
1189
def handle(self):
2246
1190
with contextlib.closing(self.server.child_pipe) as child_pipe:
2247
1191
logger.info("TCP connection from: %s",
2248
str(self.client_address))
1192
unicode(self.client_address))
2249
1193
logger.debug("Pipe FD: %d",
2250
1194
self.server.child_pipe.fileno())
2251
1195
2252
session = gnutls.ClientSession(self.request)
2253
2254
# priority = ':'.join(("NONE", "+VERS-TLS1.1",
2255
# "+AES-256-CBC", "+SHA1",
2256
# "+COMP-NULL", "+CTYPE-OPENPGP",
2257
# "+DHE-DSS"))
1196
session = (gnutls.connection
1197
.ClientSession(self.request,
1198
gnutls.connection
1199
.X509Credentials()))
1200
1201
# Note: gnutls.connection.X509Credentials is really a
1202
# generic GnuTLS certificate credentials object so long as
1203
# no X.509 keys are added to it. Therefore, we can use it
1204
# here despite using OpenPGP certificates.
1205
1206
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1207
# "+AES-256-CBC", "+SHA1",
1208
# "+COMP-NULL", "+CTYPE-OPENPGP",
1209
# "+DHE-DSS"))
2258
1210
# Use a fallback default, since this MUST be set.
2259
1211
priority = self.server.gnutls_priority
2260
1212
if priority is None:
2261
1213
priority = "NORMAL"
2262
gnutls.priority_set_direct(session._c_object,
2263
priority.encode("utf-8"),
2264
None)
1214
(gnutls.library.functions
1215
.gnutls_priority_set_direct(session._c_object,
1216
priority, None))
2265
1217
2266
1218
# Start communication using the Mandos protocol
2267
1219
# Get protocol number
2269
1221
logger.debug("Protocol version: %r", line)
2270
1222
try:
2271
1223
if int(line.strip().split()[0]) > 1:
2272
raise RuntimeError(line)
1224
raise RuntimeError
2273
1225
except (ValueError, IndexError, RuntimeError) as error:
2274
1226
logger.error("Unknown protocol version: %s", error)
2275
1227
return
2277
1229
# Start GnuTLS connection
2278
1230
try:
2279
1231
session.handshake()
2280
except gnutls.Error as error:
1232
except gnutls.errors.GNUTLSError as error:
2281
1233
logger.warning("Handshake failed: %s", error)
2282
1234
# Do not run session.bye() here: the session is not
2283
1235
# established. Just abandon the request.
2286
1238
2287
1239
approval_required = False
2288
1240
try:
2289
if gnutls.has_rawpk:
2290
fpr = ""
2291
try:
2292
key_id = self.key_id(
2293
self.peer_certificate(session))
2294
except (TypeError, gnutls.Error) as error:
2295
logger.warning("Bad certificate: %s", error)
2296
return
2297
logger.debug("Key ID: %s", key_id)
2298
2299
else:
2300
key_id = ""
2301
try:
2302
fpr = self.fingerprint(
2303
self.peer_certificate(session))
2304
except (TypeError, gnutls.Error) as error:
2305
logger.warning("Bad certificate: %s", error)
2306
return
2307
logger.debug("Fingerprint: %s", fpr)
2308
2309
try:
2310
client = ProxyClient(child_pipe, key_id, fpr,
1241
try:
1242
fpr = self.fingerprint(self.peer_certificate
1243
(session))
1244
except (TypeError,
1245
gnutls.errors.GNUTLSError) as error:
1246
logger.warning("Bad certificate: %s", error)
1247
return
1248
logger.debug("Fingerprint: %s", fpr)
1249
1250
try:
1251
client = ProxyClient(child_pipe, fpr,
2311
1252
self.client_address)
2312
1253
except KeyError:
2313
1254
return
2314
1255
2315
1256
if client.approval_delay:
2316
1257
delay = client.approval_delay
2317
1258
client.approvals_pending += 1
2318
1259
approval_required = True
2319
1260
2320
1261
while True:
2321
1262
if not client.enabled:
2322
logger.info("Client %s is disabled",
2323
client.name)
1263
logger.warning("Client %s is disabled",
1264
client.name)
2324
1265
if self.server.use_dbus:
2325
1266
# Emit D-Bus signal
2326
client.Rejected("Disabled")
1267
client.Rejected("Disabled")
2327
1268
return
2328
2329
if client.approved or not client.approval_delay:
2330
# We are approved or approval is disabled
1269
1270
if client._approved or not client.approval_delay:
1271
#We are approved or approval is disabled
2331
1272
break
2332
elif client.approved is None:
1273
elif client._approved is None:
2333
1274
logger.info("Client %s needs approval",
2334
1275
client.name)
2335
1276
if self.server.use_dbus:
2336
1277
# Emit D-Bus signal
2337
1278
client.NeedApproval(
2338
client.approval_delay.total_seconds()
2339
* 1000, client.approved_by_default)
1279
client.approval_delay_milliseconds(),
1280
client.approved_by_default)
2340
1281
else:
2341
1282
logger.warning("Client %s was not approved",
2342
1283
client.name)
2344
1285
# Emit D-Bus signal
2345
1286
client.Rejected("Denied")
2346
1287
return
2347
2348
# wait until timeout or approved
1288
1289
#wait until timeout or approved
1290
#x = float(client._timedelta_to_milliseconds(delay))
2349
1291
time = datetime.datetime.now()
2350
1292
client.changedstate.acquire()
2351
client.changedstate.wait(delay.total_seconds())
1293
client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))
2352
1294
client.changedstate.release()
2353
1295
time2 = datetime.datetime.now()
2354
1296
if (time2 - time) >= delay:
2364
1306
break
2365
1307
else:
2366
1308
delay -= time2 - time
2367
2368
try:
2369
session.send(client.secret)
2370
except gnutls.Error as error:
2371
logger.warning("gnutls send failed",
2372
exc_info=error)
2373
return
1309
1310
sent_size = 0
1311
while sent_size < len(client.secret):
1312
try:
1313
sent = session.send(client.secret[sent_size:])
1314
except gnutls.errors.GNUTLSError as error:
1315
logger.warning("gnutls send failed")
1316
return
1317
logger.debug("Sent: %d, remaining: %d",
1318
sent, len(client.secret)
1319
- (sent_size + sent))
1320
sent_size += sent
2374
1321
2375
1322
logger.info("Sending secret to %s", client.name)
2376
# bump the timeout using extended_timeout
2377
client.bump_timeout(client.extended_timeout)
1323
# bump the timeout as if seen
1324
client.checked_ok()
2378
1325
if self.server.use_dbus:
2379
1326
# Emit D-Bus signal
2380
1327
client.GotSecret()
2381
1328
2382
1329
finally:
2383
1330
if approval_required:
2384
1331
client.approvals_pending -= 1
2385
1332
try:
2386
1333
session.bye()
2387
except gnutls.Error as error:
2388
logger.warning("GnuTLS bye failed",
2389
exc_info=error)
2390
1334
except gnutls.errors.GNUTLSError as error:
1335
logger.warning("GnuTLS bye failed")
1336
2391
1337
@staticmethod
2392
1338
def peer_certificate(session):
2393
"Return the peer's certificate as a bytestring"
2394
try:
2395
cert_type = gnutls.certificate_type_get2(session._c_object,
2396
gnutls.CTYPE_PEERS)
2397
except AttributeError:
2398
cert_type = gnutls.certificate_type_get(session._c_object)
2399
if gnutls.has_rawpk:
2400
valid_cert_types = frozenset((gnutls.CRT_RAWPK,))
2401
else:
2402
valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))
2403
# If not a valid certificate type...
2404
if cert_type not in valid_cert_types:
2405
logger.info("Cert type %r not in %r", cert_type,
2406
valid_cert_types)
2407
# ...return invalid data
2408
return b""
1339
"Return the peer's OpenPGP certificate as a bytestring"
1340
# If not an OpenPGP certificate...
1341
if (gnutls.library.functions
1342
.gnutls_certificate_type_get(session._c_object)
1343
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1344
# ...do the normal thing
1345
return session.peer_certificate
2409
1346
list_size = ctypes.c_uint(1)
2410
cert_list = (gnutls.certificate_get_peers
1347
cert_list = (gnutls.library.functions
1348
.gnutls_certificate_get_peers
2411
1349
(session._c_object, ctypes.byref(list_size)))
2412
1350
if not bool(cert_list) and list_size.value != 0:
2413
raise gnutls.Error("error getting peer certificate")
1351
raise gnutls.errors.GNUTLSError("error getting peer"
1352
" certificate")
2414
1353
if list_size.value == 0:
2415
1354
return None
2416
1355
cert = cert_list[0]
2417
1356
return ctypes.string_at(cert.data, cert.size)
2418
2419
@staticmethod
2420
def key_id(certificate):
2421
"Convert a certificate bytestring to a hexdigit key ID"
2422
# New GnuTLS "datum" with the public key
2423
datum = gnutls.datum_t(
2424
ctypes.cast(ctypes.c_char_p(certificate),
2425
ctypes.POINTER(ctypes.c_ubyte)),
2426
ctypes.c_uint(len(certificate)))
2427
# XXX all these need to be created in the gnutls "module"
2428
# New empty GnuTLS certificate
2429
pubkey = gnutls.pubkey_t()
2430
gnutls.pubkey_init(ctypes.byref(pubkey))
2431
# Import the raw public key into the certificate
2432
gnutls.pubkey_import(pubkey,
2433
ctypes.byref(datum),
2434
gnutls.X509_FMT_DER)
2435
# New buffer for the key ID
2436
buf = ctypes.create_string_buffer(32)
2437
buf_len = ctypes.c_size_t(len(buf))
2438
# Get the key ID from the raw public key into the buffer
2439
gnutls.pubkey_get_key_id(pubkey,
2440
gnutls.KEYID_USE_SHA256,
2441
ctypes.cast(ctypes.byref(buf),
2442
ctypes.POINTER(ctypes.c_ubyte)),
2443
ctypes.byref(buf_len))
2444
# Deinit the certificate
2445
gnutls.pubkey_deinit(pubkey)
2446
2447
# Convert the buffer to a Python bytestring
2448
key_id = ctypes.string_at(buf, buf_len.value)
2449
# Convert the bytestring to hexadecimal notation
2450
hex_key_id = binascii.hexlify(key_id).upper()
2451
return hex_key_id
2452
1357
2453
1358
@staticmethod
2454
1359
def fingerprint(openpgp):
2455
1360
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
2456
1361
# New GnuTLS "datum" with the OpenPGP public key
2457
datum = gnutls.datum_t(
2458
ctypes.cast(ctypes.c_char_p(openpgp),
2459
ctypes.POINTER(ctypes.c_ubyte)),
2460
ctypes.c_uint(len(openpgp)))
1362
datum = (gnutls.library.types
1363
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1364
ctypes.POINTER
1365
(ctypes.c_ubyte)),
1366
ctypes.c_uint(len(openpgp))))
2461
1367
# New empty GnuTLS certificate
2462
crt = gnutls.openpgp_crt_t()
2463
gnutls.openpgp_crt_init(ctypes.byref(crt))
1368
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1369
(gnutls.library.functions
1370
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
2464
1371
# Import the OpenPGP public key into the certificate
2465
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2466
gnutls.OPENPGP_FMT_RAW)
1372
(gnutls.library.functions
1373
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1374
gnutls.library.constants
1375
.GNUTLS_OPENPGP_FMT_RAW))
2467
1376
# Verify the self signature in the key
2468
1377
crtverify = ctypes.c_uint()
2469
gnutls.openpgp_crt_verify_self(crt, 0,
2470
ctypes.byref(crtverify))
1378
(gnutls.library.functions
1379
.gnutls_openpgp_crt_verify_self(crt, 0,
1380
ctypes.byref(crtverify)))
2471
1381
if crtverify.value != 0:
2472
gnutls.openpgp_crt_deinit(crt)
2473
raise gnutls.CertificateSecurityError(code
2474
=crtverify.value)
1382
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1383
raise (gnutls.errors.CertificateSecurityError
1384
("Verify failed"))
2475
1385
# New buffer for the fingerprint
2476
1386
buf = ctypes.create_string_buffer(20)
2477
1387
buf_len = ctypes.c_size_t()
2478
1388
# Get the fingerprint from the certificate into the buffer
2479
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2480
ctypes.byref(buf_len))
1389
(gnutls.library.functions
1390
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1391
ctypes.byref(buf_len)))
2481
1392
# Deinit the certificate
2482
gnutls.openpgp_crt_deinit(crt)
1393
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2483
1394
# Convert the buffer to a Python bytestring
2484
1395
fpr = ctypes.string_at(buf, buf_len.value)
2485
1396
# Convert the bytestring to hexadecimal notation
2486
hex_fpr = binascii.hexlify(fpr).upper()
1397
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
2487
1398
return hex_fpr
2488
1399
2489
1400
2490
1401
class MultiprocessingMixIn(object):
2491
1402
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2492
2493
1403
def sub_process_main(self, request, address):
2494
1404
try:
2495
1405
self.finish_request(request, address)
2496
except Exception:
1406
except:
2497
1407
self.handle_error(request, address)
2498
1408
self.close_request(request)
2499
1409
2500
1410
def process_request(self, request, address):
2501
1411
"""Start a new process to process the request."""
2502
proc = multiprocessing.Process(target=self.sub_process_main,
2503
args=(request, address))
2504
proc.start()
2505
return proc
2506
1412
multiprocessing.Process(target = self.sub_process_main,
1413
args = (request, address)).start()
2507
1414
2508
1415
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
2509
1416
""" adds a pipe to the MixIn """
2510
2511
1417
def process_request(self, request, client_address):
2512
1418
"""Overrides and wraps the original process_request().
2513
1419
2514
1420
This function creates a new pipe in self.pipe
2515
1421
"""
2516
1422
parent_pipe, self.child_pipe = multiprocessing.Pipe()
2517
1423
2518
proc = MultiprocessingMixIn.process_request(self, request,
2519
client_address)
1424
super(MultiprocessingMixInWithPipe,
1425
self).process_request(request, client_address)
2520
1426
self.child_pipe.close()
2521
self.add_pipe(parent_pipe, proc)
1427
self.add_pipe(parent_pipe)
2522
1428
2523
def add_pipe(self, parent_pipe, proc):
1429
def add_pipe(self, parent_pipe):
2524
1430
"""Dummy function; override as necessary"""
2525
raise NotImplementedError()
2526
1431
raise NotImplementedError
2527
1432
2528
1433
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
2529
1434
socketserver.TCPServer, object):
2530
1435
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
2531
1436
2532
1437
Attributes:
2533
1438
enabled: Boolean; whether this server is activated yet
2534
1439
interface: None or a network interface name (string)
2535
1440
use_ipv6: Boolean; to use IPv6 or not
2536
1441
"""
2537
2538
1442
def __init__(self, server_address, RequestHandlerClass,
2539
interface=None,
2540
use_ipv6=True,
2541
socketfd=None):
2542
"""If socketfd is set, use that file descriptor instead of
2543
creating a new one with socket.socket().
2544
"""
1443
interface=None, use_ipv6=True):
2545
1444
self.interface = interface
2546
1445
if use_ipv6:
2547
1446
self.address_family = socket.AF_INET6
2548
if socketfd is not None:
2549
# Save the file descriptor
2550
self.socketfd = socketfd
2551
# Save the original socket.socket() function
2552
self.socket_socket = socket.socket
2553
2554
# To implement --socket, we monkey patch socket.socket.
2555
#
2556
# (When socketserver.TCPServer is a new-style class, we
2557
# could make self.socket into a property instead of monkey
2558
# patching socket.socket.)
2559
#
2560
# Create a one-time-only replacement for socket.socket()
2561
@functools.wraps(socket.socket)
2562
def socket_wrapper(*args, **kwargs):
2563
# Restore original function so subsequent calls are
2564
# not affected.
2565
socket.socket = self.socket_socket
2566
del self.socket_socket
2567
# This time only, return a new socket object from the
2568
# saved file descriptor.
2569
return socket.fromfd(self.socketfd, *args, **kwargs)
2570
# Replace socket.socket() function with wrapper
2571
socket.socket = socket_wrapper
2572
# The socketserver.TCPServer.__init__ will call
2573
# socket.socket(), which might be our replacement,
2574
# socket_wrapper(), if socketfd was set.
2575
1447
socketserver.TCPServer.__init__(self, server_address,
2576
1448
RequestHandlerClass)
2577
2578
1449
def server_bind(self):
2579
1450
"""This overrides the normal server_bind() function
2580
1451
to bind to an interface if one was specified, and also NOT to
2581
1452
bind to an address or port if they were not specified."""
2582
global SO_BINDTODEVICE
2583
1453
if self.interface is not None:
2584
1454
if SO_BINDTODEVICE is None:
2585
# Fall back to a hard-coded value which seems to be
2586
# common enough.
2587
logger.warning("SO_BINDTODEVICE not found, trying 25")
2588
SO_BINDTODEVICE = 25
2589
try:
2590
self.socket.setsockopt(
2591
socket.SOL_SOCKET, SO_BINDTODEVICE,
2592
(self.interface + "\0").encode("utf-8"))
2593
except socket.error as error:
2594
if error.errno == errno.EPERM:
2595
logger.error("No permission to bind to"
2596
" interface %s", self.interface)
2597
elif error.errno == errno.ENOPROTOOPT:
2598
logger.error("SO_BINDTODEVICE not available;"
2599
" cannot bind to interface %s",
2600
self.interface)
2601
elif error.errno == errno.ENODEV:
2602
logger.error("Interface %s does not exist,"
2603
" cannot bind", self.interface)
2604
else:
2605
raise
1455
logger.error("SO_BINDTODEVICE does not exist;"
1456
" cannot bind to interface %s",
1457
self.interface)
1458
else:
1459
try:
1460
self.socket.setsockopt(socket.SOL_SOCKET,
1461
SO_BINDTODEVICE,
1462
str(self.interface
1463
+ '\0'))
1464
except socket.error as error:
1465
if error[0] == errno.EPERM:
1466
logger.error("No permission to"
1467
" bind to interface %s",
1468
self.interface)
1469
elif error[0] == errno.ENOPROTOOPT:
1470
logger.error("SO_BINDTODEVICE not available;"
1471
" cannot bind to interface %s",
1472
self.interface)
1473
else:
1474
raise
2606
1475
# Only bind(2) the socket if we really need to.
2607
1476
if self.server_address[0] or self.server_address[1]:
2608
if self.server_address[1]:
2609
self.allow_reuse_address = True
2610
1477
if not self.server_address[0]:
2611
1478
if self.address_family == socket.AF_INET6:
2612
any_address = "::" # in6addr_any
1479
any_address = "::" # in6addr_any
2613
1480
else:
2614
any_address = "0.0.0.0" # INADDR_ANY
1481
any_address = socket.INADDR_ANY
2615
1482
self.server_address = (any_address,
2616
1483
self.server_address[1])
2617
1484
elif not self.server_address[1]:
2618
self.server_address = (self.server_address[0], 0)
1485
self.server_address = (self.server_address[0],
1486
0)
2619
1487
# if self.interface:
2620
1488
# self.server_address = (self.server_address[0],
2621
1489
# 0, # port
2627
1495
2628
1496
class MandosServer(IPv6_TCPServer):
2629
1497
"""Mandos server.
2630
1498
2631
1499
Attributes:
2632
1500
clients: set of Client objects
2633
1501
gnutls_priority GnuTLS priority string
2634
1502
use_dbus: Boolean; to emit D-Bus signals or not
2635
2636
Assumes a GLib.MainLoop event loop.
1503
1504
Assumes a gobject.MainLoop event loop.
2637
1505
"""
2638
2639
1506
def __init__(self, server_address, RequestHandlerClass,
2640
interface=None,
2641
use_ipv6=True,
2642
clients=None,
2643
gnutls_priority=None,
2644
use_dbus=True,
2645
socketfd=None):
1507
interface=None, use_ipv6=True, clients=None,
1508
gnutls_priority=None, use_dbus=True):
2646
1509
self.enabled = False
2647
1510
self.clients = clients
2648
1511
if self.clients is None:
2649
self.clients = {}
1512
self.clients = set()
2650
1513
self.use_dbus = use_dbus
2651
1514
self.gnutls_priority = gnutls_priority
2652
1515
IPv6_TCPServer.__init__(self, server_address,
2653
1516
RequestHandlerClass,
2654
interface=interface,
2655
use_ipv6=use_ipv6,
2656
socketfd=socketfd)
2657
1517
interface = interface,
1518
use_ipv6 = use_ipv6)
2658
1519
def server_activate(self):
2659
1520
if self.enabled:
2660
1521
return socketserver.TCPServer.server_activate(self)
2661
2662
1522
def enable(self):
2663
1523
self.enabled = True
2664
2665
def add_pipe(self, parent_pipe, proc):
1524
def add_pipe(self, parent_pipe):
2666
1525
# Call "handle_ipc" for both data and EOF events
2667
GLib.io_add_watch(
2668
parent_pipe.fileno(),
2669
GLib.IO_IN | GLib.IO_HUP,
2670
functools.partial(self.handle_ipc,
2671
parent_pipe=parent_pipe,
2672
proc=proc))
2673
2674
def handle_ipc(self, source, condition,
2675
parent_pipe=None,
2676
proc=None,
1526
gobject.io_add_watch(parent_pipe.fileno(),
1527
gobject.IO_IN | gobject.IO_HUP,
1528
functools.partial(self.handle_ipc,
1529
parent_pipe = parent_pipe))
1530
1531
def handle_ipc(self, source, condition, parent_pipe=None,
2677
1532
client_object=None):
2678
# error, or the other end of multiprocessing.Pipe has closed
2679
if condition & (GLib.IO_ERR | GLib.IO_HUP):
2680
# Wait for other process to exit
2681
proc.join()
1533
condition_names = {
1534
gobject.IO_IN: "IN", # There is data to read.
1535
gobject.IO_OUT: "OUT", # Data can be written (without
1536
# blocking).
1537
gobject.IO_PRI: "PRI", # There is urgent data to read.
1538
gobject.IO_ERR: "ERR", # Error condition.
1539
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1540
# broken, usually for pipes and
1541
# sockets).
1542
}
1543
conditions_string = ' | '.join(name
1544
for cond, name in
1545
condition_names.iteritems()
1546
if cond & condition)
1547
# error or the other end of multiprocessing.Pipe has closed
1548
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
2682
1549
return False
2683
1550
2684
1551
# Read a request from the child
2685
1552
request = parent_pipe.recv()
2686
1553
command = request[0]
2687
1554
2688
1555
if command == 'init':
2689
key_id = request[1].decode("ascii")
2690
fpr = request[2].decode("ascii")
2691
address = request[3]
2692
2693
for c in self.clients.values():
2694
if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":
2695
continue
2696
if key_id and c.key_id == key_id:
2697
client = c
2698
break
2699
if fpr and c.fingerprint == fpr:
1556
fpr = request[1]
1557
address = request[2]
1558
1559
for c in self.clients:
1560
if c.fingerprint == fpr:
2700
1561
client = c
2701
1562
break
2702
1563
else:
2703
logger.info("Client not found for key ID: %s, address"
2704
": %s", key_id or fpr, address)
1564
logger.warning("Client not found for fingerprint: %s, ad"
1565
"dress: %s", fpr, address)
2705
1566
if self.use_dbus:
2706
1567
# Emit D-Bus signal
2707
mandos_dbus_service.ClientNotFound(key_id or fpr,
2708
address[0])
1568
mandos_dbus_service.ClientNotFound(fpr, address[0])
2709
1569
parent_pipe.send(False)
2710
1570
return False
2711
2712
GLib.io_add_watch(
2713
parent_pipe.fileno(),
2714
GLib.IO_IN | GLib.IO_HUP,
2715
functools.partial(self.handle_ipc,
2716
parent_pipe=parent_pipe,
2717
proc=proc,
2718
client_object=client))
1571
1572
gobject.io_add_watch(parent_pipe.fileno(),
1573
gobject.IO_IN | gobject.IO_HUP,
1574
functools.partial(self.handle_ipc,
1575
parent_pipe = parent_pipe,
1576
client_object = client))
2719
1577
parent_pipe.send(True)
2720
# remove the old hook in favor of the new above hook on
2721
# same fileno
1578
# remove the old hook in favor of the new above hook on same fileno
2722
1579
return False
2723
1580
if command == 'funcall':
2724
1581
funcname = request[1]
2725
1582
args = request[2]
2726
1583
kwargs = request[3]
2727
2728
parent_pipe.send(('data', getattr(client_object,
2729
funcname)(*args,
2730
**kwargs)))
1584
1585
parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))
2731
1586
2732
1587
if command == 'getattr':
2733
1588
attrname = request[1]
2734
if isinstance(client_object.__getattribute__(attrname),
2735
collections.Callable):
2736
parent_pipe.send(('function', ))
1589
if callable(client_object.__getattribute__(attrname)):
1590
parent_pipe.send(('function',))
2737
1591
else:
2738
parent_pipe.send((
2739
'data', client_object.__getattribute__(attrname)))
2740
1592
parent_pipe.send(('data', client_object.__getattribute__(attrname)))
1593
2741
1594
if command == 'setattr':
2742
1595
attrname = request[1]
2743
1596
value = request[2]
2746
1599
return True
2747
1600
2748
1601
2749
def rfc3339_duration_to_delta(duration):
2750
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2751
2752
>>> rfc3339_duration_to_delta("P7D")
2753
datetime.timedelta(7)
2754
>>> rfc3339_duration_to_delta("PT60S")
2755
datetime.timedelta(0, 60)
2756
>>> rfc3339_duration_to_delta("PT60M")
2757
datetime.timedelta(0, 3600)
2758
>>> rfc3339_duration_to_delta("PT24H")
2759
datetime.timedelta(1)
2760
>>> rfc3339_duration_to_delta("P1W")
2761
datetime.timedelta(7)
2762
>>> rfc3339_duration_to_delta("PT5M30S")
2763
datetime.timedelta(0, 330)
2764
>>> rfc3339_duration_to_delta("P1DT3M20S")
2765
datetime.timedelta(1, 200)
2766
"""
2767
2768
# Parsing an RFC 3339 duration with regular expressions is not
2769
# possible - there would have to be multiple places for the same
2770
# values, like seconds. The current code, while more esoteric, is
2771
# cleaner without depending on a parsing library. If Python had a
2772
# built-in library for parsing we would use it, but we'd like to
2773
# avoid excessive use of external libraries.
2774
2775
# New type for defining tokens, syntax, and semantics all-in-one
2776
Token = collections.namedtuple("Token", (
2777
"regexp", # To match token; if "value" is not None, must have
2778
# a "group" containing digits
2779
"value", # datetime.timedelta or None
2780
"followers")) # Tokens valid after this token
2781
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2782
# the "duration" ABNF definition in RFC 3339, Appendix A.
2783
token_end = Token(re.compile(r"$"), None, frozenset())
2784
token_second = Token(re.compile(r"(\d+)S"),
2785
datetime.timedelta(seconds=1),
2786
frozenset((token_end, )))
2787
token_minute = Token(re.compile(r"(\d+)M"),
2788
datetime.timedelta(minutes=1),
2789
frozenset((token_second, token_end)))
2790
token_hour = Token(re.compile(r"(\d+)H"),
2791
datetime.timedelta(hours=1),
2792
frozenset((token_minute, token_end)))
2793
token_time = Token(re.compile(r"T"),
2794
None,
2795
frozenset((token_hour, token_minute,
2796
token_second)))
2797
token_day = Token(re.compile(r"(\d+)D"),
2798
datetime.timedelta(days=1),
2799
frozenset((token_time, token_end)))
2800
token_month = Token(re.compile(r"(\d+)M"),
2801
datetime.timedelta(weeks=4),
2802
frozenset((token_day, token_end)))
2803
token_year = Token(re.compile(r"(\d+)Y"),
2804
datetime.timedelta(weeks=52),
2805
frozenset((token_month, token_end)))
2806
token_week = Token(re.compile(r"(\d+)W"),
2807
datetime.timedelta(weeks=1),
2808
frozenset((token_end, )))
2809
token_duration = Token(re.compile(r"P"), None,
2810
frozenset((token_year, token_month,
2811
token_day, token_time,
2812
token_week)))
2813
# Define starting values:
2814
# Value so far
2815
value = datetime.timedelta()
2816
found_token = None
2817
# Following valid tokens
2818
followers = frozenset((token_duration, ))
2819
# String left to parse
2820
s = duration
2821
# Loop until end token is found
2822
while found_token is not token_end:
2823
# Search for any currently valid tokens
2824
for token in followers:
2825
match = token.regexp.match(s)
2826
if match is not None:
2827
# Token found
2828
if token.value is not None:
2829
# Value found, parse digits
2830
factor = int(match.group(1), 10)
2831
# Add to value so far
2832
value += factor * token.value
2833
# Strip token from string
2834
s = token.regexp.sub("", s, 1)
2835
# Go to found token
2836
found_token = token
2837
# Set valid next tokens
2838
followers = found_token.followers
2839
break
2840
else:
2841
# No currently valid tokens were found
2842
raise ValueError("Invalid RFC 3339 duration: {!r}"
2843
.format(duration))
2844
# End token found
2845
return value
2846
2847
2848
1602
def string_to_delta(interval):
2849
1603
"""Parse a string and return a datetime.timedelta
2850
1604
2851
1605
>>> string_to_delta('7d')
2852
1606
datetime.timedelta(7)
2853
1607
>>> string_to_delta('60s')
2861
1615
>>> string_to_delta('5m 30s')
2862
1616
datetime.timedelta(0, 330)
2863
1617
"""
2864
2865
try:
2866
return rfc3339_duration_to_delta(interval)
2867
except ValueError:
2868
pass
2869
2870
1618
timevalue = datetime.timedelta(0)
2871
1619
for s in interval.split():
2872
1620
try:
2873
suffix = s[-1]
1621
suffix = unicode(s[-1])
2874
1622
value = int(s[:-1])
2875
1623
if suffix == "d":
2876
1624
delta = datetime.timedelta(value)
2883
1631
elif suffix == "w":
2884
1632
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
2885
1633
else:
2886
raise ValueError("Unknown suffix {!r}".format(suffix))
2887
except IndexError as e:
1634
raise ValueError("Unknown suffix %r" % suffix)
1635
except (ValueError, IndexError) as e:
2888
1636
raise ValueError(*(e.args))
2889
1637
timevalue += delta
2890
1638
return timevalue
2891
1639
2892
1640
2893
def daemon(nochdir=False, noclose=False):
1641
def if_nametoindex(interface):
1642
"""Call the C function if_nametoindex(), or equivalent
1643
1644
Note: This function cannot accept a unicode string."""
1645
global if_nametoindex
1646
try:
1647
if_nametoindex = (ctypes.cdll.LoadLibrary
1648
(ctypes.util.find_library("c"))
1649
.if_nametoindex)
1650
except (OSError, AttributeError):
1651
logger.warning("Doing if_nametoindex the hard way")
1652
def if_nametoindex(interface):
1653
"Get an interface index the hard way, i.e. using fcntl()"
1654
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1655
with contextlib.closing(socket.socket()) as s:
1656
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1657
struct.pack(str("16s16x"),
1658
interface))
1659
interface_index = struct.unpack(str("I"),
1660
ifreq[16:20])[0]
1661
return interface_index
1662
return if_nametoindex(interface)
1663
1664
1665
def daemon(nochdir = False, noclose = False):
2894
1666
"""See daemon(3). Standard BSD Unix function.
2895
1667
2896
1668
This should really exist as os.daemon, but it doesn't (yet)."""
2897
1669
if os.fork():
2898
1670
sys.exit()
2903
1675
sys.exit()
2904
1676
if not noclose:
2905
1677
# Close all standard open file descriptors
2906
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1678
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2907
1679
if not stat.S_ISCHR(os.fstat(null).st_mode):
2908
1680
raise OSError(errno.ENODEV,
2909
"{} not a character device"
2910
.format(os.devnull))
1681
"%s not a character device"
1682
% os.path.devnull)
2911
1683
os.dup2(null, sys.stdin.fileno())
2912
1684
os.dup2(null, sys.stdout.fileno())
2913
1685
os.dup2(null, sys.stderr.fileno())
2916
1688
2917
1689
2918
1690
def main():
2919
1691
2920
1692
##################################################################
2921
1693
# Parsing of options, both command line and config file
2922
1694
2923
1695
parser = argparse.ArgumentParser()
2924
1696
parser.add_argument("-v", "--version", action="version",
2925
version="%(prog)s {}".format(version),
1697
version = "%%(prog)s %s" % version,
2926
1698
help="show version number and exit")
2927
1699
parser.add_argument("-i", "--interface", metavar="IF",
2928
1700
help="Bind to interface IF")
2934
1706
help="Run self-test")
2935
1707
parser.add_argument("--debug", action="store_true",
2936
1708
help="Debug mode; run in foreground and log"
2937
" to terminal", default=None)
1709
" to terminal")
2938
1710
parser.add_argument("--debuglevel", metavar="LEVEL",
2939
1711
help="Debug level for stdout output")
2940
1712
parser.add_argument("--priority", help="GnuTLS"
2947
1719
" files")
2948
1720
parser.add_argument("--no-dbus", action="store_false",
2949
1721
dest="use_dbus", help="Do not provide D-Bus"
2950
" system bus interface", default=None)
1722
" system bus interface")
2951
1723
parser.add_argument("--no-ipv6", action="store_false",
2952
dest="use_ipv6", help="Do not use IPv6",
2953
default=None)
2954
parser.add_argument("--no-restore", action="store_false",
2955
dest="restore", help="Do not restore stored"
2956
" state", default=None)
2957
parser.add_argument("--socket", type=int,
2958
help="Specify a file descriptor to a network"
2959
" socket to use instead of creating one")
2960
parser.add_argument("--statedir", metavar="DIR",
2961
help="Directory to save/restore state in")
2962
parser.add_argument("--foreground", action="store_true",
2963
help="Run in foreground", default=None)
2964
parser.add_argument("--no-zeroconf", action="store_false",
2965
dest="zeroconf", help="Do not use Zeroconf",
2966
default=None)
2967
1724
dest="use_ipv6", help="Do not use IPv6")
2968
1725
options = parser.parse_args()
2969
1726
2970
1727
if options.check:
2971
1728
import doctest
2972
fail_count, test_count = doctest.testmod()
2973
sys.exit(os.EX_OK if fail_count == 0 else 1)
2974
1729
doctest.testmod()
1730
sys.exit()
1731
2975
1732
# Default values for config file for server-global settings
2976
if gnutls.has_rawpk:
2977
priority = ("SECURE128:!CTYPE-X.509:+CTYPE-RAWPK:!RSA"
2978
":!VERS-ALL:+VERS-TLS1.3:%PROFILE_ULTRA")
2979
else:
2980
priority = ("SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2981
":+SIGN-DSA-SHA256")
2982
server_defaults = {"interface": "",
2983
"address": "",
2984
"port": "",
2985
"debug": "False",
2986
"priority": priority,
2987
"servicename": "Mandos",
2988
"use_dbus": "True",
2989
"use_ipv6": "True",
2990
"debuglevel": "",
2991
"restore": "True",
2992
"socket": "",
2993
"statedir": "/var/lib/mandos",
2994
"foreground": "False",
2995
"zeroconf": "True",
2996
}
2997
del priority
2998
1733
server_defaults = { "interface": "",
1734
"address": "",
1735
"port": "",
1736
"debug": "False",
1737
"priority":
1738
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1739
"servicename": "Mandos",
1740
"use_dbus": "True",
1741
"use_ipv6": "True",
1742
"debuglevel": "",
1743
}
1744
2999
1745
# Parse config file for server-global settings
3000
1746
server_config = configparser.SafeConfigParser(server_defaults)
3001
1747
del server_defaults
3002
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1748
server_config.read(os.path.join(options.configdir,
1749
"mandos.conf"))
3003
1750
# Convert the SafeConfigParser object to a dict
3004
1751
server_settings = server_config.defaults()
3005
1752
# Use the appropriate methods on the non-string config options
3006
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3007
"foreground", "zeroconf"):
1753
for option in ("debug", "use_dbus", "use_ipv6"):
3008
1754
server_settings[option] = server_config.getboolean("DEFAULT",
3009
1755
option)
3010
1756
if server_settings["port"]:
3011
1757
server_settings["port"] = server_config.getint("DEFAULT",
3012
1758
"port")
3013
if server_settings["socket"]:
3014
server_settings["socket"] = server_config.getint("DEFAULT",
3015
"socket")
3016
# Later, stdin will, and stdout and stderr might, be dup'ed
3017
# over with an opened os.devnull. But we don't want this to
3018
# happen with a supplied network socket.
3019
if 0 <= server_settings["socket"] <= 2:
3020
server_settings["socket"] = os.dup(server_settings
3021
["socket"])
3022
1759
del server_config
3023
1760
3024
1761
# Override the settings from the config file with command line
3025
1762
# options, if set.
3026
1763
for option in ("interface", "address", "port", "debug",
3027
"priority", "servicename", "configdir", "use_dbus",
3028
"use_ipv6", "debuglevel", "restore", "statedir",
3029
"socket", "foreground", "zeroconf"):
1764
"priority", "servicename", "configdir",
1765
"use_dbus", "use_ipv6", "debuglevel"):
3030
1766
value = getattr(options, option)
3031
1767
if value is not None:
3032
1768
server_settings[option] = value
3033
1769
del options
3034
1770
# Force all strings to be unicode
3035
1771
for option in server_settings.keys():
3036
if isinstance(server_settings[option], bytes):
3037
server_settings[option] = (server_settings[option]
3038
.decode("utf-8"))
3039
# Force all boolean options to be boolean
3040
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3041
"foreground", "zeroconf"):
3042
server_settings[option] = bool(server_settings[option])
3043
# Debug implies foreground
3044
if server_settings["debug"]:
3045
server_settings["foreground"] = True
1772
if type(server_settings[option]) is str:
1773
server_settings[option] = unicode(server_settings[option])
3046
1774
# Now we have our good server settings in "server_settings"
3047
1775
3048
1776
##################################################################
3049
3050
if (not server_settings["zeroconf"]
3051
and not (server_settings["port"]
3052
or server_settings["socket"] != "")):
3053
parser.error("Needs port or socket to work without Zeroconf")
3054
1777
3055
1778
# For convenience
3056
1779
debug = server_settings["debug"]
3057
1780
debuglevel = server_settings["debuglevel"]
3058
1781
use_dbus = server_settings["use_dbus"]
3059
1782
use_ipv6 = server_settings["use_ipv6"]
3060
stored_state_path = os.path.join(server_settings["statedir"],
3061
stored_state_file)
3062
foreground = server_settings["foreground"]
3063
zeroconf = server_settings["zeroconf"]
3064
3065
if debug:
3066
initlogger(debug, logging.DEBUG)
3067
else:
3068
if not debuglevel:
3069
initlogger(debug)
3070
else:
3071
level = getattr(logging, debuglevel.upper())
3072
initlogger(debug, level)
3073
1783
3074
1784
if server_settings["servicename"] != "Mandos":
3075
syslogger.setFormatter(
3076
logging.Formatter('Mandos ({}) [%(process)d]:'
3077
' %(levelname)s: %(message)s'.format(
3078
server_settings["servicename"])))
3079
1785
syslogger.setFormatter(logging.Formatter
1786
('Mandos (%s) [%%(process)d]:'
1787
' %%(levelname)s: %%(message)s'
1788
% server_settings["servicename"]))
1789
3080
1790
# Parse config file with clients
3081
client_config = configparser.SafeConfigParser(Client
3082
.client_defaults)
1791
client_defaults = { "timeout": "1h",
1792
"interval": "5m",
1793
"checker": "fping -q -- %%(host)s",
1794
"host": "",
1795
"approval_delay": "0s",
1796
"approval_duration": "1s",
1797
}
1798
client_config = configparser.SafeConfigParser(client_defaults)
3083
1799
client_config.read(os.path.join(server_settings["configdir"],
3084
1800
"clients.conf"))
3085
1801
3086
1802
global mandos_dbus_service
3087
1803
mandos_dbus_service = None
3088
3089
socketfd = None
3090
if server_settings["socket"] != "":
3091
socketfd = server_settings["socket"]
3092
tcp_server = MandosServer(
3093
(server_settings["address"], server_settings["port"]),
3094
ClientHandler,
3095
interface=(server_settings["interface"] or None),
3096
use_ipv6=use_ipv6,
3097
gnutls_priority=server_settings["priority"],
3098
use_dbus=use_dbus,
3099
socketfd=socketfd)
3100
if not foreground:
3101
pidfilename = "/run/mandos.pid"
3102
if not os.path.isdir("/run/."):
3103
pidfilename = "/var/run/mandos.pid"
3104
pidfile = None
3105
try:
3106
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
3107
except IOError as e:
3108
logger.error("Could not open file %r", pidfilename,
3109
exc_info=e)
3110
3111
for name, group in (("_mandos", "_mandos"),
3112
("mandos", "mandos"),
3113
("nobody", "nogroup")):
3114
try:
3115
uid = pwd.getpwnam(name).pw_uid
3116
gid = pwd.getpwnam(group).pw_gid
3117
break
1804
1805
tcp_server = MandosServer((server_settings["address"],
1806
server_settings["port"]),
1807
ClientHandler,
1808
interface=(server_settings["interface"]
1809
or None),
1810
use_ipv6=use_ipv6,
1811
gnutls_priority=
1812
server_settings["priority"],
1813
use_dbus=use_dbus)
1814
if not debug:
1815
pidfilename = "/var/run/mandos.pid"
1816
try:
1817
pidfile = open(pidfilename, "w")
1818
except IOError:
1819
logger.error("Could not open file %r", pidfilename)
1820
1821
try:
1822
uid = pwd.getpwnam("_mandos").pw_uid
1823
gid = pwd.getpwnam("_mandos").pw_gid
1824
except KeyError:
1825
try:
1826
uid = pwd.getpwnam("mandos").pw_uid
1827
gid = pwd.getpwnam("mandos").pw_gid
3118
1828
except KeyError:
3119
continue
3120
else:
3121
uid = 65534
3122
gid = 65534
1829
try:
1830
uid = pwd.getpwnam("nobody").pw_uid
1831
gid = pwd.getpwnam("nobody").pw_gid
1832
except KeyError:
1833
uid = 65534
1834
gid = 65534
3123
1835
try:
3124
1836
os.setgid(gid)
3125
1837
os.setuid(uid)
3126
if debug:
3127
logger.debug("Did setuid/setgid to {}:{}".format(uid,
3128
gid))
3129
1838
except OSError as error:
3130
logger.warning("Failed to setuid/setgid to {}:{}: {}"
3131
.format(uid, gid, os.strerror(error.errno)))
3132
if error.errno != errno.EPERM:
3133
raise
1839
if error[0] != errno.EPERM:
1840
raise error
1841
1842
if not debug and not debuglevel:
1843
syslogger.setLevel(logging.WARNING)
1844
console.setLevel(logging.WARNING)
1845
if debuglevel:
1846
level = getattr(logging, debuglevel.upper())
1847
syslogger.setLevel(level)
1848
console.setLevel(level)
3134
1849
3135
1850
if debug:
3136
1851
# Enable all possible GnuTLS debugging
3137
1852
3138
1853
# "Use a log level over 10 to enable all debugging options."
3139
1854
# - GnuTLS manual
3140
gnutls.global_set_log_level(11)
3141
3142
@gnutls.log_func
1855
gnutls.library.functions.gnutls_global_set_log_level(11)
1856
1857
@gnutls.library.types.gnutls_log_func
3143
1858
def debug_gnutls(level, string):
3144
1859
logger.debug("GnuTLS: %s", string[:-1])
3145
3146
gnutls.global_set_log_function(debug_gnutls)
3147
1860
1861
(gnutls.library.functions
1862
.gnutls_global_set_log_function(debug_gnutls))
1863
3148
1864
# Redirect stdin so all checkers get /dev/null
3149
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1865
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
3150
1866
os.dup2(null, sys.stdin.fileno())
3151
1867
if null > 2:
3152
1868
os.close(null)
3153
1869
else:
1870
# No console logging
1871
logger.removeHandler(console)
1872
3154
1873
# Need to fork before connecting to D-Bus
3155
if not foreground:
1874
if not debug:
3156
1875
# Close all input and output, do double fork, etc.
3157
1876
daemon()
3158
3159
# multiprocessing will use threads, so before we use GLib we need
3160
# to inform GLib that threads will be used.
3161
GLib.threads_init()
3162
1877
3163
1878
global main_loop
3164
1879
# From the Avahi example code
3165
DBusGMainLoop(set_as_default=True)
3166
main_loop = GLib.MainLoop()
1880
DBusGMainLoop(set_as_default=True )
1881
main_loop = gobject.MainLoop()
3167
1882
bus = dbus.SystemBus()
3168
1883
# End of Avahi example code
3169
1884
if use_dbus:
3170
1885
try:
3171
bus_name = dbus.service.BusName("se.recompile.Mandos",
3172
bus,
3173
do_not_queue=True)
3174
old_bus_name = dbus.service.BusName(
3175
"se.bsnet.fukt.Mandos", bus,
3176
do_not_queue=True)
3177
except dbus.exceptions.DBusException as e:
3178
logger.error("Disabling D-Bus:", exc_info=e)
1886
bus_name = dbus.service.BusName("se.bsnet.fukt.Mandos",
1887
bus, do_not_queue=True)
1888
except dbus.exceptions.NameExistsException as e:
1889
logger.error(unicode(e) + ", disabling D-Bus")
3179
1890
use_dbus = False
3180
1891
server_settings["use_dbus"] = False
3181
1892
tcp_server.use_dbus = False
3182
if zeroconf:
3183
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3184
service = AvahiServiceToSyslog(
3185
name=server_settings["servicename"],
3186
servicetype="_mandos._tcp",
3187
protocol=protocol,
3188
bus=bus)
3189
if server_settings["interface"]:
3190
service.interface = if_nametoindex(
3191
server_settings["interface"].encode("utf-8"))
3192
1893
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1894
service = AvahiService(name = server_settings["servicename"],
1895
servicetype = "_mandos._tcp",
1896
protocol = protocol, bus = bus)
1897
if server_settings["interface"]:
1898
service.interface = (if_nametoindex
1899
(str(server_settings["interface"])))
1900
3193
1901
global multiprocessing_manager
3194
1902
multiprocessing_manager = multiprocessing.Manager()
3195
1903
3196
1904
client_class = Client
3197
1905
if use_dbus:
3198
client_class = functools.partial(ClientDBus, bus=bus)
3199
3200
client_settings = Client.config_parser(client_config)
3201
old_client_settings = {}
3202
clients_data = {}
3203
3204
# This is used to redirect stdout and stderr for checker processes
3205
global wnull
3206
wnull = open(os.devnull, "w") # A writable /dev/null
3207
# Only used if server is running in foreground but not in debug
3208
# mode
3209
if debug or not foreground:
3210
wnull.close()
3211
3212
# Get client data and settings from last running state.
3213
if server_settings["restore"]:
3214
try:
3215
with open(stored_state_path, "rb") as stored_state:
3216
if sys.version_info.major == 2:
3217
clients_data, old_client_settings = pickle.load(
3218
stored_state)
3219
else:
3220
bytes_clients_data, bytes_old_client_settings = (
3221
pickle.load(stored_state, encoding="bytes"))
3222
# Fix bytes to strings
3223
# clients_data
3224
# .keys()
3225
clients_data = {(key.decode("utf-8")
3226
if isinstance(key, bytes)
3227
else key): value
3228
for key, value in
3229
bytes_clients_data.items()}
3230
del bytes_clients_data
3231
for key in clients_data:
3232
value = {(k.decode("utf-8")
3233
if isinstance(k, bytes) else k): v
3234
for k, v in
3235
clients_data[key].items()}
3236
clients_data[key] = value
3237
# .client_structure
3238
value["client_structure"] = [
3239
(s.decode("utf-8")
3240
if isinstance(s, bytes)
3241
else s) for s in
3242
value["client_structure"]]
3243
# .name & .host
3244
for k in ("name", "host"):
3245
if isinstance(value[k], bytes):
3246
value[k] = value[k].decode("utf-8")
3247
if not value.has_key("key_id"):
3248
value["key_id"] = ""
3249
elif not value.has_key("fingerprint"):
3250
value["fingerprint"] = ""
3251
# old_client_settings
3252
# .keys()
3253
old_client_settings = {
3254
(key.decode("utf-8")
3255
if isinstance(key, bytes)
3256
else key): value
3257
for key, value in
3258
bytes_old_client_settings.items()}
3259
del bytes_old_client_settings
3260
# .host
3261
for value in old_client_settings.values():
3262
if isinstance(value["host"], bytes):
3263
value["host"] = (value["host"]
3264
.decode("utf-8"))
3265
os.remove(stored_state_path)
3266
except IOError as e:
3267
if e.errno == errno.ENOENT:
3268
logger.warning("Could not load persistent state:"
3269
" {}".format(os.strerror(e.errno)))
3270
else:
3271
logger.critical("Could not load persistent state:",
3272
exc_info=e)
3273
raise
3274
except EOFError as e:
3275
logger.warning("Could not load persistent state: "
3276
"EOFError:",
3277
exc_info=e)
3278
3279
with PGPEngine() as pgp:
3280
for client_name, client in clients_data.items():
3281
# Skip removed clients
3282
if client_name not in client_settings:
3283
continue
3284
3285
# Decide which value to use after restoring saved state.
3286
# We have three different values: Old config file,
3287
# new config file, and saved state.
3288
# New config value takes precedence if it differs from old
3289
# config value, otherwise use saved state.
3290
for name, value in client_settings[client_name].items():
3291
try:
3292
# For each value in new config, check if it
3293
# differs from the old config value (Except for
3294
# the "secret" attribute)
3295
if (name != "secret"
3296
and (value !=
3297
old_client_settings[client_name][name])):
3298
client[name] = value
3299
except KeyError:
3300
pass
3301
3302
# Clients who has passed its expire date can still be
3303
# enabled if its last checker was successful. A Client
3304
# whose checker succeeded before we stored its state is
3305
# assumed to have successfully run all checkers during
3306
# downtime.
3307
if client["enabled"]:
3308
if datetime.datetime.utcnow() >= client["expires"]:
3309
if not client["last_checked_ok"]:
3310
logger.warning(
3311
"disabling client {} - Client never "
3312
"performed a successful checker".format(
3313
client_name))
3314
client["enabled"] = False
3315
elif client["last_checker_status"] != 0:
3316
logger.warning(
3317
"disabling client {} - Client last"
3318
" checker failed with error code"
3319
" {}".format(
3320
client_name,
3321
client["last_checker_status"]))
3322
client["enabled"] = False
3323
else:
3324
client["expires"] = (
3325
datetime.datetime.utcnow()
3326
+ client["timeout"])
3327
logger.debug("Last checker succeeded,"
3328
" keeping {} enabled".format(
3329
client_name))
1906
client_class = functools.partial(ClientDBus, bus = bus)
1907
def client_config_items(config, section):
1908
special_settings = {
1909
"approved_by_default":
1910
lambda: config.getboolean(section,
1911
"approved_by_default"),
1912
}
1913
for name, value in config.items(section):
3330
1914
try:
3331
client["secret"] = pgp.decrypt(
3332
client["encrypted_secret"],
3333
client_settings[client_name]["secret"])
3334
except PGPError:
3335
# If decryption fails, we use secret from new settings
3336
logger.debug("Failed to decrypt {} old secret".format(
3337
client_name))
3338
client["secret"] = (client_settings[client_name]
3339
["secret"])
3340
3341
# Add/remove clients based on new changes made to config
3342
for client_name in (set(old_client_settings)
3343
- set(client_settings)):
3344
del clients_data[client_name]
3345
for client_name in (set(client_settings)
3346
- set(old_client_settings)):
3347
clients_data[client_name] = client_settings[client_name]
3348
3349
# Create all client objects
3350
for client_name, client in clients_data.items():
3351
tcp_server.clients[client_name] = client_class(
3352
name=client_name,
3353
settings=client,
3354
server_settings=server_settings)
3355
1915
yield (name, special_settings[name]())
1916
except KeyError:
1917
yield (name, value)
1918
1919
tcp_server.clients.update(set(
1920
client_class(name = section,
1921
config= dict(client_config_items(
1922
client_config, section)))
1923
for section in client_config.sections()))
3356
1924
if not tcp_server.clients:
3357
1925
logger.warning("No clients defined")
3358
3359
if not foreground:
3360
if pidfile is not None:
3361
pid = os.getpid()
3362
try:
3363
with pidfile:
3364
print(pid, file=pidfile)
3365
except IOError:
3366
logger.error("Could not write to file %r with PID %d",
3367
pidfilename, pid)
3368
del pidfile
1926
1927
if not debug:
1928
try:
1929
with pidfile:
1930
pid = os.getpid()
1931
pidfile.write(str(pid) + "\n".encode("utf-8"))
1932
del pidfile
1933
except IOError:
1934
logger.error("Could not write to file %r with PID %d",
1935
pidfilename, pid)
1936
except NameError:
1937
# "pidfile" was never created
1938
pass
3369
1939
del pidfilename
3370
3371
for termsig in (signal.SIGHUP, signal.SIGTERM):
3372
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3373
lambda: main_loop.quit() and False)
3374
1940
1941
signal.signal(signal.SIGINT, signal.SIG_IGN)
1942
1943
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1944
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1945
3375
1946
if use_dbus:
3376
3377
@alternate_dbus_interfaces(
3378
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3379
class MandosDBusService(DBusObjectWithObjectManager):
1947
class MandosDBusService(dbus.service.Object):
3380
1948
"""A D-Bus proxy object"""
3381
3382
1949
def __init__(self):
3383
1950
dbus.service.Object.__init__(self, bus, "/")
3384
3385
_interface = "se.recompile.Mandos"
3386
1951
_interface = "se.bsnet.fukt.Mandos"
1952
3387
1953
@dbus.service.signal(_interface, signature="o")
3388
1954
def ClientAdded(self, objpath):
3389
1955
"D-Bus signal"
3390
1956
pass
3391
1957
3392
1958
@dbus.service.signal(_interface, signature="ss")
3393
def ClientNotFound(self, key_id, address):
1959
def ClientNotFound(self, fingerprint, address):
3394
1960
"D-Bus signal"
3395
1961
pass
3396
3397
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3398
"true"})
1962
3399
1963
@dbus.service.signal(_interface, signature="os")
3400
1964
def ClientRemoved(self, objpath, name):
3401
1965
"D-Bus signal"
3402
1966
pass
3403
3404
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3405
"true"})
1967
3406
1968
@dbus.service.method(_interface, out_signature="ao")
3407
1969
def GetAllClients(self):
3408
1970
"D-Bus method"
3409
return dbus.Array(c.dbus_object_path for c in
3410
tcp_server.clients.values())
3411
3412
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3413
"true"})
1971
return dbus.Array(c.dbus_object_path
1972
for c in tcp_server.clients)
1973
3414
1974
@dbus.service.method(_interface,
3415
1975
out_signature="a{oa{sv}}")
3416
1976
def GetAllClientsWithProperties(self):
3417
1977
"D-Bus method"
3418
1978
return dbus.Dictionary(
3419
{c.dbus_object_path: c.GetAll(
3420
"se.recompile.Mandos.Client")
3421
for c in tcp_server.clients.values()},
1979
((c.dbus_object_path, c.GetAll(""))
1980
for c in tcp_server.clients),
3422
1981
signature="oa{sv}")
3423
1982
3424
1983
@dbus.service.method(_interface, in_signature="o")
3425
1984
def RemoveClient(self, object_path):
3426
1985
"D-Bus method"
3427
for c in tcp_server.clients.values():
1986
for c in tcp_server.clients:
3428
1987
if c.dbus_object_path == object_path:
3429
del tcp_server.clients[c.name]
1988
tcp_server.clients.remove(c)
3430
1989
c.remove_from_connection()
3431
# Don't signal the disabling
1990
# Don't signal anything except ClientRemoved
3432
1991
c.disable(quiet=True)
3433
# Emit D-Bus signal for removal
3434
self.client_removed_signal(c)
1992
# Emit D-Bus signal
1993
self.ClientRemoved(object_path, c.name)
3435
1994
return
3436
1995
raise KeyError(object_path)
3437
1996
3438
1997
del _interface
3439
3440
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3441
out_signature="a{oa{sa{sv}}}")
3442
def GetManagedObjects(self):
3443
"""D-Bus method"""
3444
return dbus.Dictionary(
3445
{client.dbus_object_path:
3446
dbus.Dictionary(
3447
{interface: client.GetAll(interface)
3448
for interface in
3449
client._get_all_interface_names()})
3450
for client in tcp_server.clients.values()})
3451
3452
def client_added_signal(self, client):
3453
"""Send the new standard signal and the old signal"""
3454
if use_dbus:
3455
# New standard signal
3456
self.InterfacesAdded(
3457
client.dbus_object_path,
3458
dbus.Dictionary(
3459
{interface: client.GetAll(interface)
3460
for interface in
3461
client._get_all_interface_names()}))
3462
# Old signal
3463
self.ClientAdded(client.dbus_object_path)
3464
3465
def client_removed_signal(self, client):
3466
"""Send the new standard signal and the old signal"""
3467
if use_dbus:
3468
# New standard signal
3469
self.InterfacesRemoved(
3470
client.dbus_object_path,
3471
client._get_all_interface_names())
3472
# Old signal
3473
self.ClientRemoved(client.dbus_object_path,
3474
client.name)
3475
1998
3476
1999
mandos_dbus_service = MandosDBusService()
3477
3478
# Save modules to variables to exempt the modules from being
3479
# unloaded before the function registered with atexit() is run.
3480
mp = multiprocessing
3481
wn = wnull
3482
2000
3483
2001
def cleanup():
3484
2002
"Cleanup function; run on exit"
3485
if zeroconf:
3486
service.cleanup()
3487
3488
mp.active_children()
3489
wn.close()
3490
if not (tcp_server.clients or client_settings):
3491
return
3492
3493
# Store client before exiting. Secrets are encrypted with key
3494
# based on what config file has. If config file is
3495
# removed/edited, old secret will thus be unrecovable.
3496
clients = {}
3497
with PGPEngine() as pgp:
3498
for client in tcp_server.clients.values():
3499
key = client_settings[client.name]["secret"]
3500
client.encrypted_secret = pgp.encrypt(client.secret,
3501
key)
3502
client_dict = {}
3503
3504
# A list of attributes that can not be pickled
3505
# + secret.
3506
exclude = {"bus", "changedstate", "secret",
3507
"checker", "server_settings"}
3508
for name, typ in inspect.getmembers(dbus.service
3509
.Object):
3510
exclude.add(name)
3511
3512
client_dict["encrypted_secret"] = (client
3513
.encrypted_secret)
3514
for attr in client.client_structure:
3515
if attr not in exclude:
3516
client_dict[attr] = getattr(client, attr)
3517
3518
clients[client.name] = client_dict
3519
del client_settings[client.name]["secret"]
3520
3521
try:
3522
with tempfile.NamedTemporaryFile(
3523
mode='wb',
3524
suffix=".pickle",
3525
prefix='clients-',
3526
dir=os.path.dirname(stored_state_path),
3527
delete=False) as stored_state:
3528
pickle.dump((clients, client_settings), stored_state,
3529
protocol=2)
3530
tempname = stored_state.name
3531
os.rename(tempname, stored_state_path)
3532
except (IOError, OSError) as e:
3533
if not debug:
3534
try:
3535
os.remove(tempname)
3536
except NameError:
3537
pass
3538
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
3539
logger.warning("Could not save persistent state: {}"
3540
.format(os.strerror(e.errno)))
3541
else:
3542
logger.warning("Could not save persistent state:",
3543
exc_info=e)
3544
raise
3545
3546
# Delete all clients, and settings from config
2003
service.cleanup()
2004
3547
2005
while tcp_server.clients:
3548
name, client = tcp_server.clients.popitem()
2006
client = tcp_server.clients.pop()
3549
2007
if use_dbus:
3550
2008
client.remove_from_connection()
3551
# Don't signal the disabling
2009
client.disable_hook = None
2010
# Don't signal anything except ClientRemoved
3552
2011
client.disable(quiet=True)
3553
# Emit D-Bus signal for removal
3554
2012
if use_dbus:
3555
mandos_dbus_service.client_removed_signal(client)
3556
client_settings.clear()
3557
2013
# Emit D-Bus signal
2014
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
2015
client.name)
2016
3558
2017
atexit.register(cleanup)
3559
3560
for client in tcp_server.clients.values():
2018
2019
for client in tcp_server.clients:
3561
2020
if use_dbus:
3562
# Emit D-Bus signal for adding
3563
mandos_dbus_service.client_added_signal(client)
3564
# Need to initiate checking of clients
3565
if client.enabled:
3566
client.init_checker()
3567
2021
# Emit D-Bus signal
2022
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2023
client.enable()
2024
3568
2025
tcp_server.enable()
3569
2026
tcp_server.server_activate()
3570
2027
3571
2028
# Find out what port we got
3572
if zeroconf:
3573
service.port = tcp_server.socket.getsockname()[1]
2029
service.port = tcp_server.socket.getsockname()[1]
3574
2030
if use_ipv6:
3575
2031
logger.info("Now listening on address %r, port %d,"
3576
" flowinfo %d, scope_id %d",
3577
*tcp_server.socket.getsockname())
2032
" flowinfo %d, scope_id %d"
2033
% tcp_server.socket.getsockname())
3578
2034
else: # IPv4
3579
logger.info("Now listening on address %r, port %d",
3580
*tcp_server.socket.getsockname())
3581
3582
# service.interface = tcp_server.socket.getsockname()[3]
3583
2035
logger.info("Now listening on address %r, port %d"
2036
% tcp_server.socket.getsockname())
2037
2038
#service.interface = tcp_server.socket.getsockname()[3]
2039
3584
2040
try:
3585
if zeroconf:
3586
# From the Avahi example code
3587
try:
3588
service.activate()
3589
except dbus.exceptions.DBusException as error:
3590
logger.critical("D-Bus Exception", exc_info=error)
3591
cleanup()
3592
sys.exit(1)
3593
# End of Avahi example code
3594
3595
GLib.io_add_watch(tcp_server.fileno(), GLib.IO_IN,
3596
lambda *args, **kwargs:
3597
(tcp_server.handle_request
3598
(*args[2:], **kwargs) or True))
3599
2041
# From the Avahi example code
2042
try:
2043
service.activate()
2044
except dbus.exceptions.DBusException as error:
2045
logger.critical("DBusException: %s", error)
2046
cleanup()
2047
sys.exit(1)
2048
# End of Avahi example code
2049
2050
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2051
lambda *args, **kwargs:
2052
(tcp_server.handle_request
2053
(*args[2:], **kwargs) or True))
2054
3600
2055
logger.debug("Starting main loop")
3601
2056
main_loop.run()
3602
2057
except AvahiError as error:
3603
logger.critical("Avahi Error", exc_info=error)
2058
logger.critical("AvahiError: %s", error)
3604
2059
cleanup()
3605
2060
sys.exit(1)
3606
2061
except KeyboardInterrupt:
3611
2066
# Must run before the D-Bus bus name gets deregistered
3612
2067
cleanup()
3613
2068
3614
3615
2069
if __name__ == '__main__':
3616
2070
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0