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- Committer: Teddy Hogeborn
- Date: 2018-10-14 14:11:15 UTC
- Revision ID: teddy@recompile.se-20181014141115-1oilce79snz1ackb
Depend on either old cryptsetup or new cryptsetup-initramfs
* debian/control (Package: mandos-client/Depends): Change "cryptsetup"
to "cryptsetup (<< 2:2.0.3-1) | cryptsetup-initramfs".
* debian/control (Package: mandos-client/Depends): Change "cryptsetup"
to "cryptsetup (<< 2:2.0.3-1) | cryptsetup-initramfs".
- files added:
- bugs.xml
- debian/upstream
- network-hooks.d
- plugin-helpers
- files removed:
- initramfs-tools-hook-conf
- files modified:
- .bzrignore
added
removed
mandos
1
1
#!/usr/bin/python
2
2
# -*- mode: python; coding: utf-8 -*-
3
#
3
#
4
4
# Mandos server - give out binary blobs to connecting clients.
5
#
5
#
6
6
# This program is partly derived from an example program for an Avahi
7
7
# service publisher, downloaded from
8
8
# <http://avahi.org/wiki/PythonPublishExample>. This includes the
9
9
# methods "add", "remove", "server_state_changed",
10
10
# "entry_group_state_changed", "cleanup", and "activate" in the
11
11
# "AvahiService" class, and some lines in "main".
12
#
12
#
13
13
# Everything else is
14
# Copyright © 2008-2011 Teddy Hogeborn
15
# Copyright © 2008-2011 Björn Påhlsson
16
#
17
# This program is free software: you can redistribute it and/or modify
18
# it under the terms of the GNU General Public License as published by
14
# Copyright © 2008-2018 Teddy Hogeborn
15
# Copyright © 2008-2018 Björn Påhlsson
16
#
17
# This file is part of Mandos.
18
#
19
# Mandos is free software: you can redistribute it and/or modify it
20
# under the terms of the GNU General Public License as published by
19
21
# the Free Software Foundation, either version 3 of the License, or
20
22
# (at your option) any later version.
21
23
#
22
# This program is distributed in the hope that it will be useful,
23
# but WITHOUT ANY WARRANTY; without even the implied warranty of
24
# Mandos is distributed in the hope that it will be useful, but
25
# WITHOUT ANY WARRANTY; without even the implied warranty of
24
26
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
25
27
# GNU General Public License for more details.
26
#
28
#
27
29
# You should have received a copy of the GNU General Public License
28
# along with this program. If not, see
29
# <http://www.gnu.org/licenses/>.
30
#
31
# Contact the authors at <mandos@fukt.bsnet.se>.
32
#
30
# along with Mandos. If not, see <http://www.gnu.org/licenses/>.
31
#
32
# Contact the authors at <mandos@recompile.se>.
33
#
33
34
34
35
from __future__ import (division, absolute_import, print_function,
35
36
unicode_literals)
36
37
37
import SocketServer as socketserver
38
try:
39
from future_builtins import *
40
except ImportError:
41
pass
42
43
try:
44
import SocketServer as socketserver
45
except ImportError:
46
import socketserver
38
47
import socket
39
48
import argparse
40
49
import datetime
41
50
import errno
42
import gnutls.crypto
43
import gnutls.connection
44
import gnutls.errors
45
import gnutls.library.functions
46
import gnutls.library.constants
47
import gnutls.library.types
48
import ConfigParser as configparser
51
try:
52
import ConfigParser as configparser
53
except ImportError:
54
import configparser
49
55
import sys
50
56
import re
51
57
import os
60
66
import struct
61
67
import fcntl
62
68
import functools
63
import cPickle as pickle
69
try:
70
import cPickle as pickle
71
except ImportError:
72
import pickle
64
73
import multiprocessing
74
import types
75
import binascii
76
import tempfile
77
import itertools
78
import collections
79
import codecs
65
80
66
81
import dbus
67
82
import dbus.service
68
import gobject
69
import avahi
83
from gi.repository import GLib
70
84
from dbus.mainloop.glib import DBusGMainLoop
71
85
import ctypes
72
86
import ctypes.util
73
87
import xml.dom.minidom
74
88
import inspect
75
89
90
# Try to find the value of SO_BINDTODEVICE:
76
91
try:
92
# This is where SO_BINDTODEVICE is in Python 3.3 (or 3.4?) and
93
# newer, and it is also the most natural place for it:
77
94
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
78
95
except AttributeError:
79
96
try:
97
# This is where SO_BINDTODEVICE was up to and including Python
98
# 2.6, and also 3.2:
80
99
from IN import SO_BINDTODEVICE
81
100
except ImportError:
82
SO_BINDTODEVICE = None
83
84
85
version = "1.3.1"
86
87
#logger = logging.getLogger('mandos')
88
logger = logging.Logger('mandos')
89
syslogger = (logging.handlers.SysLogHandler
90
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
91
address = str("/dev/log")))
92
syslogger.setFormatter(logging.Formatter
93
('Mandos [%(process)d]: %(levelname)s:'
94
' %(message)s'))
95
logger.addHandler(syslogger)
96
97
console = logging.StreamHandler()
98
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
99
' %(levelname)s:'
100
' %(message)s'))
101
logger.addHandler(console)
101
# In Python 2.7 it seems to have been removed entirely.
102
# Try running the C preprocessor:
103
try:
104
cc = subprocess.Popen(["cc", "--language=c", "-E",
105
"/dev/stdin"],
106
stdin=subprocess.PIPE,
107
stdout=subprocess.PIPE)
108
stdout = cc.communicate(
109
"#include <sys/socket.h>\nSO_BINDTODEVICE\n")[0]
110
SO_BINDTODEVICE = int(stdout.splitlines()[-1])
111
except (OSError, ValueError, IndexError):
112
# No value found
113
SO_BINDTODEVICE = None
114
115
if sys.version_info.major == 2:
116
str = unicode
117
118
version = "1.7.20"
119
stored_state_file = "clients.pickle"
120
121
logger = logging.getLogger()
122
syslogger = None
123
124
try:
125
if_nametoindex = ctypes.cdll.LoadLibrary(
126
ctypes.util.find_library("c")).if_nametoindex
127
except (OSError, AttributeError):
128
129
def if_nametoindex(interface):
130
"Get an interface index the hard way, i.e. using fcntl()"
131
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
132
with contextlib.closing(socket.socket()) as s:
133
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
134
struct.pack(b"16s16x", interface))
135
interface_index = struct.unpack("I", ifreq[16:20])[0]
136
return interface_index
137
138
139
def copy_function(func):
140
"""Make a copy of a function"""
141
if sys.version_info.major == 2:
142
return types.FunctionType(func.func_code,
143
func.func_globals,
144
func.func_name,
145
func.func_defaults,
146
func.func_closure)
147
else:
148
return types.FunctionType(func.__code__,
149
func.__globals__,
150
func.__name__,
151
func.__defaults__,
152
func.__closure__)
153
154
155
def initlogger(debug, level=logging.WARNING):
156
"""init logger and add loglevel"""
157
158
global syslogger
159
syslogger = (logging.handlers.SysLogHandler(
160
facility=logging.handlers.SysLogHandler.LOG_DAEMON,
161
address="/dev/log"))
162
syslogger.setFormatter(logging.Formatter
163
('Mandos [%(process)d]: %(levelname)s:'
164
' %(message)s'))
165
logger.addHandler(syslogger)
166
167
if debug:
168
console = logging.StreamHandler()
169
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
170
' [%(process)d]:'
171
' %(levelname)s:'
172
' %(message)s'))
173
logger.addHandler(console)
174
logger.setLevel(level)
175
176
177
class PGPError(Exception):
178
"""Exception if encryption/decryption fails"""
179
pass
180
181
182
class PGPEngine(object):
183
"""A simple class for OpenPGP symmetric encryption & decryption"""
184
185
def __init__(self):
186
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
187
self.gpg = "gpg"
188
try:
189
output = subprocess.check_output(["gpgconf"])
190
for line in output.splitlines():
191
name, text, path = line.split(b":")
192
if name == "gpg":
193
self.gpg = path
194
break
195
except OSError as e:
196
if e.errno != errno.ENOENT:
197
raise
198
self.gnupgargs = ['--batch',
199
'--homedir', self.tempdir,
200
'--force-mdc',
201
'--quiet']
202
# Only GPG version 1 has the --no-use-agent option.
203
if self.gpg == "gpg" or self.gpg.endswith("/gpg"):
204
self.gnupgargs.append("--no-use-agent")
205
206
def __enter__(self):
207
return self
208
209
def __exit__(self, exc_type, exc_value, traceback):
210
self._cleanup()
211
return False
212
213
def __del__(self):
214
self._cleanup()
215
216
def _cleanup(self):
217
if self.tempdir is not None:
218
# Delete contents of tempdir
219
for root, dirs, files in os.walk(self.tempdir,
220
topdown=False):
221
for filename in files:
222
os.remove(os.path.join(root, filename))
223
for dirname in dirs:
224
os.rmdir(os.path.join(root, dirname))
225
# Remove tempdir
226
os.rmdir(self.tempdir)
227
self.tempdir = None
228
229
def password_encode(self, password):
230
# Passphrase can not be empty and can not contain newlines or
231
# NUL bytes. So we prefix it and hex encode it.
232
encoded = b"mandos" + binascii.hexlify(password)
233
if len(encoded) > 2048:
234
# GnuPG can't handle long passwords, so encode differently
235
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
236
.replace(b"\n", b"\\n")
237
.replace(b"\0", b"\\x00"))
238
return encoded
239
240
def encrypt(self, data, password):
241
passphrase = self.password_encode(password)
242
with tempfile.NamedTemporaryFile(
243
dir=self.tempdir) as passfile:
244
passfile.write(passphrase)
245
passfile.flush()
246
proc = subprocess.Popen([self.gpg, '--symmetric',
247
'--passphrase-file',
248
passfile.name]
249
+ self.gnupgargs,
250
stdin=subprocess.PIPE,
251
stdout=subprocess.PIPE,
252
stderr=subprocess.PIPE)
253
ciphertext, err = proc.communicate(input=data)
254
if proc.returncode != 0:
255
raise PGPError(err)
256
return ciphertext
257
258
def decrypt(self, data, password):
259
passphrase = self.password_encode(password)
260
with tempfile.NamedTemporaryFile(
261
dir=self.tempdir) as passfile:
262
passfile.write(passphrase)
263
passfile.flush()
264
proc = subprocess.Popen([self.gpg, '--decrypt',
265
'--passphrase-file',
266
passfile.name]
267
+ self.gnupgargs,
268
stdin=subprocess.PIPE,
269
stdout=subprocess.PIPE,
270
stderr=subprocess.PIPE)
271
decrypted_plaintext, err = proc.communicate(input=data)
272
if proc.returncode != 0:
273
raise PGPError(err)
274
return decrypted_plaintext
275
276
277
# Pretend that we have an Avahi module
278
class Avahi(object):
279
"""This isn't so much a class as it is a module-like namespace.
280
It is instantiated once, and simulates having an Avahi module."""
281
IF_UNSPEC = -1 # avahi-common/address.h
282
PROTO_UNSPEC = -1 # avahi-common/address.h
283
PROTO_INET = 0 # avahi-common/address.h
284
PROTO_INET6 = 1 # avahi-common/address.h
285
DBUS_NAME = "org.freedesktop.Avahi"
286
DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"
287
DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"
288
DBUS_PATH_SERVER = "/"
289
290
def string_array_to_txt_array(self, t):
291
return dbus.Array((dbus.ByteArray(s.encode("utf-8"))
292
for s in t), signature="ay")
293
ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h
294
ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h
295
ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h
296
SERVER_INVALID = 0 # avahi-common/defs.h
297
SERVER_REGISTERING = 1 # avahi-common/defs.h
298
SERVER_RUNNING = 2 # avahi-common/defs.h
299
SERVER_COLLISION = 3 # avahi-common/defs.h
300
SERVER_FAILURE = 4 # avahi-common/defs.h
301
avahi = Avahi()
302
102
303
103
304
class AvahiError(Exception):
104
305
def __init__(self, value, *args, **kwargs):
105
306
self.value = value
106
super(AvahiError, self).__init__(value, *args, **kwargs)
107
def __unicode__(self):
108
return unicode(repr(self.value))
307
return super(AvahiError, self).__init__(value, *args,
308
**kwargs)
309
109
310
110
311
class AvahiServiceError(AvahiError):
111
312
pass
112
313
314
113
315
class AvahiGroupError(AvahiError):
114
316
pass
115
317
116
318
117
319
class AvahiService(object):
118
320
"""An Avahi (Zeroconf) service.
119
321
120
322
Attributes:
121
323
interface: integer; avahi.IF_UNSPEC or an interface index.
122
324
Used to optionally bind to the specified interface.
123
325
name: string; Example: 'Mandos'
124
326
type: string; Example: '_mandos._tcp'.
125
See <http://www.dns-sd.org/ServiceTypes.html>
327
See <https://www.iana.org/assignments/service-names-port-numbers>
126
328
port: integer; what port to announce
127
329
TXT: list of strings; TXT record for the service
128
330
domain: string; Domain to publish on, default to .local if empty.
134
336
server: D-Bus Server
135
337
bus: dbus.SystemBus()
136
338
"""
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):
339
340
def __init__(self,
341
interface=avahi.IF_UNSPEC,
342
name=None,
343
servicetype=None,
344
port=None,
345
TXT=None,
346
domain="",
347
host="",
348
max_renames=32768,
349
protocol=avahi.PROTO_UNSPEC,
350
bus=None):
141
351
self.interface = interface
142
352
self.name = name
143
353
self.type = servicetype
152
362
self.server = None
153
363
self.bus = bus
154
364
self.entry_group_state_changed_match = None
155
def rename(self):
365
366
def rename(self, remove=True):
156
367
"""Derived from the Avahi example code"""
157
368
if self.rename_count >= self.max_renames:
158
369
logger.critical("No suitable Zeroconf service name found"
159
370
" after %i retries, exiting.",
160
371
self.rename_count)
161
372
raise AvahiServiceError("Too many renames")
162
self.name = unicode(self.server.GetAlternativeServiceName(self.name))
373
self.name = str(
374
self.server.GetAlternativeServiceName(self.name))
375
self.rename_count += 1
163
376
logger.info("Changing Zeroconf service name to %r ...",
164
377
self.name)
165
syslogger.setFormatter(logging.Formatter
166
('Mandos (%s) [%%(process)d]:'
167
' %%(levelname)s: %%(message)s'
168
% self.name))
169
self.remove()
378
if remove:
379
self.remove()
170
380
try:
171
381
self.add()
172
382
except dbus.exceptions.DBusException as error:
173
logger.critical("DBusException: %s", error)
174
self.cleanup()
175
os._exit(1)
176
self.rename_count += 1
383
if (error.get_dbus_name()
384
== "org.freedesktop.Avahi.CollisionError"):
385
logger.info("Local Zeroconf service name collision.")
386
return self.rename(remove=False)
387
else:
388
logger.critical("D-Bus Exception", exc_info=error)
389
self.cleanup()
390
os._exit(1)
391
177
392
def remove(self):
178
393
"""Derived from the Avahi example code"""
179
394
if self.entry_group_state_changed_match is not None:
181
396
self.entry_group_state_changed_match = None
182
397
if self.group is not None:
183
398
self.group.Reset()
399
184
400
def add(self):
185
401
"""Derived from the Avahi example code"""
186
402
self.remove()
191
407
avahi.DBUS_INTERFACE_ENTRY_GROUP)
192
408
self.entry_group_state_changed_match = (
193
409
self.group.connect_to_signal(
194
'StateChanged', self .entry_group_state_changed))
410
'StateChanged', self.entry_group_state_changed))
195
411
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
196
412
self.name, self.type)
197
413
self.group.AddService(
203
419
dbus.UInt16(self.port),
204
420
avahi.string_array_to_txt_array(self.TXT))
205
421
self.group.Commit()
422
206
423
def entry_group_state_changed(self, state, error):
207
424
"""Derived from the Avahi example code"""
208
425
logger.debug("Avahi entry group state change: %i", state)
209
426
210
427
if state == avahi.ENTRY_GROUP_ESTABLISHED:
211
428
logger.debug("Zeroconf service established.")
212
429
elif state == avahi.ENTRY_GROUP_COLLISION:
214
431
self.rename()
215
432
elif state == avahi.ENTRY_GROUP_FAILURE:
216
433
logger.critical("Avahi: Error in group state changed %s",
217
unicode(error))
218
raise AvahiGroupError("State changed: %s"
219
% unicode(error))
434
str(error))
435
raise AvahiGroupError("State changed: {!s}".format(error))
436
220
437
def cleanup(self):
221
438
"""Derived from the Avahi example code"""
222
439
if self.group is not None:
223
440
try:
224
441
self.group.Free()
225
442
except (dbus.exceptions.UnknownMethodException,
226
dbus.exceptions.DBusException) as e:
443
dbus.exceptions.DBusException):
227
444
pass
228
445
self.group = None
229
446
self.remove()
447
230
448
def server_state_changed(self, state, error=None):
231
449
"""Derived from the Avahi example code"""
232
450
logger.debug("Avahi server state change: %i", state)
233
bad_states = { avahi.SERVER_INVALID:
234
"Zeroconf server invalid",
235
avahi.SERVER_REGISTERING: None,
236
avahi.SERVER_COLLISION:
237
"Zeroconf server name collision",
238
avahi.SERVER_FAILURE:
239
"Zeroconf server failure" }
451
bad_states = {
452
avahi.SERVER_INVALID: "Zeroconf server invalid",
453
avahi.SERVER_REGISTERING: None,
454
avahi.SERVER_COLLISION: "Zeroconf server name collision",
455
avahi.SERVER_FAILURE: "Zeroconf server failure",
456
}
240
457
if state in bad_states:
241
458
if bad_states[state] is not None:
242
459
if error is None:
245
462
logger.error(bad_states[state] + ": %r", error)
246
463
self.cleanup()
247
464
elif state == avahi.SERVER_RUNNING:
248
self.add()
465
try:
466
self.add()
467
except dbus.exceptions.DBusException as error:
468
if (error.get_dbus_name()
469
== "org.freedesktop.Avahi.CollisionError"):
470
logger.info("Local Zeroconf service name"
471
" collision.")
472
return self.rename(remove=False)
473
else:
474
logger.critical("D-Bus Exception", exc_info=error)
475
self.cleanup()
476
os._exit(1)
249
477
else:
250
478
if error is None:
251
479
logger.debug("Unknown state: %r", state)
252
480
else:
253
481
logger.debug("Unknown state: %r: %r", state, error)
482
254
483
def activate(self):
255
484
"""Derived from the Avahi example code"""
256
485
if self.server is None:
260
489
follow_name_owner_changes=True),
261
490
avahi.DBUS_INTERFACE_SERVER)
262
491
self.server.connect_to_signal("StateChanged",
263
self.server_state_changed)
492
self.server_state_changed)
264
493
self.server_state_changed(self.server.GetState())
265
494
266
495
267
def _timedelta_to_milliseconds(td):
268
"Convert a datetime.timedelta() to milliseconds"
269
return ((td.days * 24 * 60 * 60 * 1000)
270
+ (td.seconds * 1000)
271
+ (td.microseconds // 1000))
272
496
class AvahiServiceToSyslog(AvahiService):
497
def rename(self, *args, **kwargs):
498
"""Add the new name to the syslog messages"""
499
ret = super(AvahiServiceToSyslog, self).rename(*args, **kwargs)
500
syslogger.setFormatter(logging.Formatter(
501
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
502
.format(self.name)))
503
return ret
504
505
506
# Pretend that we have a GnuTLS module
507
class GnuTLS(object):
508
"""This isn't so much a class as it is a module-like namespace.
509
It is instantiated once, and simulates having a GnuTLS module."""
510
511
library = ctypes.util.find_library("gnutls")
512
if library is None:
513
library = ctypes.util.find_library("gnutls-deb0")
514
_library = ctypes.cdll.LoadLibrary(library)
515
del library
516
_need_version = b"3.3.0"
517
518
def __init__(self):
519
# Need to use "self" here, since this method is called before
520
# the assignment to the "gnutls" global variable happens.
521
if self.check_version(self._need_version) is None:
522
raise self.Error("Needs GnuTLS {} or later"
523
.format(self._need_version))
524
525
# Unless otherwise indicated, the constants and types below are
526
# all from the gnutls/gnutls.h C header file.
527
528
# Constants
529
E_SUCCESS = 0
530
E_INTERRUPTED = -52
531
E_AGAIN = -28
532
CRT_OPENPGP = 2
533
CLIENT = 2
534
SHUT_RDWR = 0
535
CRD_CERTIFICATE = 1
536
E_NO_CERTIFICATE_FOUND = -49
537
OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
538
539
# Types
540
class session_int(ctypes.Structure):
541
_fields_ = []
542
session_t = ctypes.POINTER(session_int)
543
544
class certificate_credentials_st(ctypes.Structure):
545
_fields_ = []
546
certificate_credentials_t = ctypes.POINTER(
547
certificate_credentials_st)
548
certificate_type_t = ctypes.c_int
549
550
class datum_t(ctypes.Structure):
551
_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
552
('size', ctypes.c_uint)]
553
554
class openpgp_crt_int(ctypes.Structure):
555
_fields_ = []
556
openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
557
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
558
log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
559
credentials_type_t = ctypes.c_int
560
transport_ptr_t = ctypes.c_void_p
561
close_request_t = ctypes.c_int
562
563
# Exceptions
564
class Error(Exception):
565
# We need to use the class name "GnuTLS" here, since this
566
# exception might be raised from within GnuTLS.__init__,
567
# which is called before the assignment to the "gnutls"
568
# global variable has happened.
569
def __init__(self, message=None, code=None, args=()):
570
# Default usage is by a message string, but if a return
571
# code is passed, convert it to a string with
572
# gnutls.strerror()
573
self.code = code
574
if message is None and code is not None:
575
message = GnuTLS.strerror(code)
576
return super(GnuTLS.Error, self).__init__(
577
message, *args)
578
579
class CertificateSecurityError(Error):
580
pass
581
582
# Classes
583
class Credentials(object):
584
def __init__(self):
585
self._c_object = gnutls.certificate_credentials_t()
586
gnutls.certificate_allocate_credentials(
587
ctypes.byref(self._c_object))
588
self.type = gnutls.CRD_CERTIFICATE
589
590
def __del__(self):
591
gnutls.certificate_free_credentials(self._c_object)
592
593
class ClientSession(object):
594
def __init__(self, socket, credentials=None):
595
self._c_object = gnutls.session_t()
596
gnutls.init(ctypes.byref(self._c_object), gnutls.CLIENT)
597
gnutls.set_default_priority(self._c_object)
598
gnutls.transport_set_ptr(self._c_object, socket.fileno())
599
gnutls.handshake_set_private_extensions(self._c_object,
600
True)
601
self.socket = socket
602
if credentials is None:
603
credentials = gnutls.Credentials()
604
gnutls.credentials_set(self._c_object, credentials.type,
605
ctypes.cast(credentials._c_object,
606
ctypes.c_void_p))
607
self.credentials = credentials
608
609
def __del__(self):
610
gnutls.deinit(self._c_object)
611
612
def handshake(self):
613
return gnutls.handshake(self._c_object)
614
615
def send(self, data):
616
data = bytes(data)
617
data_len = len(data)
618
while data_len > 0:
619
data_len -= gnutls.record_send(self._c_object,
620
data[-data_len:],
621
data_len)
622
623
def bye(self):
624
return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
625
626
# Error handling functions
627
def _error_code(result):
628
"""A function to raise exceptions on errors, suitable
629
for the 'restype' attribute on ctypes functions"""
630
if result >= 0:
631
return result
632
if result == gnutls.E_NO_CERTIFICATE_FOUND:
633
raise gnutls.CertificateSecurityError(code=result)
634
raise gnutls.Error(code=result)
635
636
def _retry_on_error(result, func, arguments):
637
"""A function to retry on some errors, suitable
638
for the 'errcheck' attribute on ctypes functions"""
639
while result < 0:
640
if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
641
return _error_code(result)
642
result = func(*arguments)
643
return result
644
645
# Unless otherwise indicated, the function declarations below are
646
# all from the gnutls/gnutls.h C header file.
647
648
# Functions
649
priority_set_direct = _library.gnutls_priority_set_direct
650
priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
651
ctypes.POINTER(ctypes.c_char_p)]
652
priority_set_direct.restype = _error_code
653
654
init = _library.gnutls_init
655
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
656
init.restype = _error_code
657
658
set_default_priority = _library.gnutls_set_default_priority
659
set_default_priority.argtypes = [session_t]
660
set_default_priority.restype = _error_code
661
662
record_send = _library.gnutls_record_send
663
record_send.argtypes = [session_t, ctypes.c_void_p,
664
ctypes.c_size_t]
665
record_send.restype = ctypes.c_ssize_t
666
record_send.errcheck = _retry_on_error
667
668
certificate_allocate_credentials = (
669
_library.gnutls_certificate_allocate_credentials)
670
certificate_allocate_credentials.argtypes = [
671
ctypes.POINTER(certificate_credentials_t)]
672
certificate_allocate_credentials.restype = _error_code
673
674
certificate_free_credentials = (
675
_library.gnutls_certificate_free_credentials)
676
certificate_free_credentials.argtypes = [
677
certificate_credentials_t]
678
certificate_free_credentials.restype = None
679
680
handshake_set_private_extensions = (
681
_library.gnutls_handshake_set_private_extensions)
682
handshake_set_private_extensions.argtypes = [session_t,
683
ctypes.c_int]
684
handshake_set_private_extensions.restype = None
685
686
credentials_set = _library.gnutls_credentials_set
687
credentials_set.argtypes = [session_t, credentials_type_t,
688
ctypes.c_void_p]
689
credentials_set.restype = _error_code
690
691
strerror = _library.gnutls_strerror
692
strerror.argtypes = [ctypes.c_int]
693
strerror.restype = ctypes.c_char_p
694
695
certificate_type_get = _library.gnutls_certificate_type_get
696
certificate_type_get.argtypes = [session_t]
697
certificate_type_get.restype = _error_code
698
699
certificate_get_peers = _library.gnutls_certificate_get_peers
700
certificate_get_peers.argtypes = [session_t,
701
ctypes.POINTER(ctypes.c_uint)]
702
certificate_get_peers.restype = ctypes.POINTER(datum_t)
703
704
global_set_log_level = _library.gnutls_global_set_log_level
705
global_set_log_level.argtypes = [ctypes.c_int]
706
global_set_log_level.restype = None
707
708
global_set_log_function = _library.gnutls_global_set_log_function
709
global_set_log_function.argtypes = [log_func]
710
global_set_log_function.restype = None
711
712
deinit = _library.gnutls_deinit
713
deinit.argtypes = [session_t]
714
deinit.restype = None
715
716
handshake = _library.gnutls_handshake
717
handshake.argtypes = [session_t]
718
handshake.restype = _error_code
719
handshake.errcheck = _retry_on_error
720
721
transport_set_ptr = _library.gnutls_transport_set_ptr
722
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
723
transport_set_ptr.restype = None
724
725
bye = _library.gnutls_bye
726
bye.argtypes = [session_t, close_request_t]
727
bye.restype = _error_code
728
bye.errcheck = _retry_on_error
729
730
check_version = _library.gnutls_check_version
731
check_version.argtypes = [ctypes.c_char_p]
732
check_version.restype = ctypes.c_char_p
733
734
# All the function declarations below are from gnutls/openpgp.h
735
736
openpgp_crt_init = _library.gnutls_openpgp_crt_init
737
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
738
openpgp_crt_init.restype = _error_code
739
740
openpgp_crt_import = _library.gnutls_openpgp_crt_import
741
openpgp_crt_import.argtypes = [openpgp_crt_t,
742
ctypes.POINTER(datum_t),
743
openpgp_crt_fmt_t]
744
openpgp_crt_import.restype = _error_code
745
746
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
747
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
748
ctypes.POINTER(ctypes.c_uint)]
749
openpgp_crt_verify_self.restype = _error_code
750
751
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
752
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
753
openpgp_crt_deinit.restype = None
754
755
openpgp_crt_get_fingerprint = (
756
_library.gnutls_openpgp_crt_get_fingerprint)
757
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
758
ctypes.c_void_p,
759
ctypes.POINTER(
760
ctypes.c_size_t)]
761
openpgp_crt_get_fingerprint.restype = _error_code
762
763
# Remove non-public functions
764
del _error_code, _retry_on_error
765
# Create the global "gnutls" object, simulating a module
766
gnutls = GnuTLS()
767
768
769
def call_pipe(connection, # : multiprocessing.Connection
770
func, *args, **kwargs):
771
"""This function is meant to be called by multiprocessing.Process
772
773
This function runs func(*args, **kwargs), and writes the resulting
774
return value on the provided multiprocessing.Connection.
775
"""
776
connection.send(func(*args, **kwargs))
777
connection.close()
778
779
273
780
class Client(object):
274
781
"""A representation of a client host served by this server.
275
782
276
783
Attributes:
277
_approved: bool(); 'None' if not yet approved/disapproved
784
approved: bool(); 'None' if not yet approved/disapproved
278
785
approval_delay: datetime.timedelta(); Time to wait for approval
279
786
approval_duration: datetime.timedelta(); Duration of one approval
280
787
checker: subprocess.Popen(); a running checker process used
281
788
to see if the client lives.
282
789
'None' if no process is running.
283
checker_callback_tag: a gobject event source tag, or None
790
checker_callback_tag: a GLib event source tag, or None
284
791
checker_command: string; External command which is run to check
285
792
if client lives. %() expansions are done at
286
793
runtime with vars(self) as dict, so that for
287
794
instance %(name)s can be used in the command.
288
checker_initiator_tag: a gobject event source tag, or None
795
checker_initiator_tag: a GLib event source tag, or None
289
796
created: datetime.datetime(); (UTC) object creation
797
client_structure: Object describing what attributes a client has
798
and is used for storing the client at exit
290
799
current_checker_command: string; current running checker_command
291
disable_hook: If set, called by disable() as disable_hook(self)
292
disable_initiator_tag: a gobject event source tag, or None
800
disable_initiator_tag: a GLib event source tag, or None
293
801
enabled: bool()
294
802
fingerprint: string (40 or 32 hexadecimal digits); used to
295
803
uniquely identify the client
297
805
interval: datetime.timedelta(); How often to start a new checker
298
806
last_approval_request: datetime.datetime(); (UTC) or None
299
807
last_checked_ok: datetime.datetime(); (UTC) or None
300
last_enabled: datetime.datetime(); (UTC)
808
last_checker_status: integer between 0 and 255 reflecting exit
809
status of last checker. -1 reflects crashed
810
checker, -2 means no checker completed yet.
811
last_checker_signal: The signal which killed the last checker, if
812
last_checker_status is -1
813
last_enabled: datetime.datetime(); (UTC) or None
301
814
name: string; from the config file, used in log messages and
302
815
D-Bus identifiers
303
816
secret: bytestring; sent verbatim (over TLS) to client
304
817
timeout: datetime.timedelta(); How long from last_checked_ok
305
818
until this client is disabled
306
extended_timeout: extra long timeout when password has been sent
819
extended_timeout: extra long timeout when secret has been sent
307
820
runtime_expansions: Allowed attributes for runtime expansion.
308
821
expires: datetime.datetime(); time (UTC) when a client will be
309
822
disabled, or None
823
server_settings: The server_settings dict from main()
310
824
"""
311
825
312
826
runtime_expansions = ("approval_delay", "approval_duration",
313
"created", "enabled", "fingerprint",
314
"host", "interval", "last_checked_ok",
827
"created", "enabled", "expires",
828
"fingerprint", "host", "interval",
829
"last_approval_request", "last_checked_ok",
315
830
"last_enabled", "name", "timeout")
316
317
def timeout_milliseconds(self):
318
"Return the 'timeout' attribute in milliseconds"
319
return _timedelta_to_milliseconds(self.timeout)
320
321
def extended_timeout_milliseconds(self):
322
"Return the 'extended_timeout' attribute in milliseconds"
323
return _timedelta_to_milliseconds(self.extended_timeout)
324
325
def interval_milliseconds(self):
326
"Return the 'interval' attribute in milliseconds"
327
return _timedelta_to_milliseconds(self.interval)
328
329
def approval_delay_milliseconds(self):
330
return _timedelta_to_milliseconds(self.approval_delay)
331
332
def __init__(self, name = None, disable_hook=None, config=None):
333
"""Note: the 'checker' key in 'config' sets the
334
'checker_command' attribute and *not* the 'checker'
335
attribute."""
831
client_defaults = {
832
"timeout": "PT5M",
833
"extended_timeout": "PT15M",
834
"interval": "PT2M",
835
"checker": "fping -q -- %%(host)s",
836
"host": "",
837
"approval_delay": "PT0S",
838
"approval_duration": "PT1S",
839
"approved_by_default": "True",
840
"enabled": "True",
841
}
842
843
@staticmethod
844
def config_parser(config):
845
"""Construct a new dict of client settings of this form:
846
{ client_name: {setting_name: value, ...}, ...}
847
with exceptions for any special settings as defined above.
848
NOTE: Must be a pure function. Must return the same result
849
value given the same arguments.
850
"""
851
settings = {}
852
for client_name in config.sections():
853
section = dict(config.items(client_name))
854
client = settings[client_name] = {}
855
856
client["host"] = section["host"]
857
# Reformat values from string types to Python types
858
client["approved_by_default"] = config.getboolean(
859
client_name, "approved_by_default")
860
client["enabled"] = config.getboolean(client_name,
861
"enabled")
862
863
# Uppercase and remove spaces from fingerprint for later
864
# comparison purposes with return value from the
865
# fingerprint() function
866
client["fingerprint"] = (section["fingerprint"].upper()
867
.replace(" ", ""))
868
if "secret" in section:
869
client["secret"] = codecs.decode(section["secret"]
870
.encode("utf-8"),
871
"base64")
872
elif "secfile" in section:
873
with open(os.path.expanduser(os.path.expandvars
874
(section["secfile"])),
875
"rb") as secfile:
876
client["secret"] = secfile.read()
877
else:
878
raise TypeError("No secret or secfile for section {}"
879
.format(section))
880
client["timeout"] = string_to_delta(section["timeout"])
881
client["extended_timeout"] = string_to_delta(
882
section["extended_timeout"])
883
client["interval"] = string_to_delta(section["interval"])
884
client["approval_delay"] = string_to_delta(
885
section["approval_delay"])
886
client["approval_duration"] = string_to_delta(
887
section["approval_duration"])
888
client["checker_command"] = section["checker"]
889
client["last_approval_request"] = None
890
client["last_checked_ok"] = None
891
client["last_checker_status"] = -2
892
893
return settings
894
895
def __init__(self, settings, name=None, server_settings=None):
336
896
self.name = name
337
if config is None:
338
config = {}
897
if server_settings is None:
898
server_settings = {}
899
self.server_settings = server_settings
900
# adding all client settings
901
for setting, value in settings.items():
902
setattr(self, setting, value)
903
904
if self.enabled:
905
if not hasattr(self, "last_enabled"):
906
self.last_enabled = datetime.datetime.utcnow()
907
if not hasattr(self, "expires"):
908
self.expires = (datetime.datetime.utcnow()
909
+ self.timeout)
910
else:
911
self.last_enabled = None
912
self.expires = None
913
339
914
logger.debug("Creating client %r", self.name)
340
# Uppercase and remove spaces from fingerprint for later
341
# comparison purposes with return value from the fingerprint()
342
# function
343
self.fingerprint = (config["fingerprint"].upper()
344
.replace(" ", ""))
345
915
logger.debug(" Fingerprint: %s", self.fingerprint)
346
if "secret" in config:
347
self.secret = config["secret"].decode("base64")
348
elif "secfile" in config:
349
with open(os.path.expanduser(os.path.expandvars
350
(config["secfile"])),
351
"rb") as secfile:
352
self.secret = secfile.read()
353
else:
354
raise TypeError("No secret or secfile for client %s"
355
% self.name)
356
self.host = config.get("host", "")
357
self.created = datetime.datetime.utcnow()
358
self.enabled = False
359
self.last_approval_request = None
360
self.last_enabled = None
361
self.last_checked_ok = None
362
self.timeout = string_to_delta(config["timeout"])
363
self.extended_timeout = string_to_delta(config["extended_timeout"])
364
self.interval = string_to_delta(config["interval"])
365
self.disable_hook = disable_hook
916
self.created = settings.get("created",
917
datetime.datetime.utcnow())
918
919
# attributes specific for this server instance
366
920
self.checker = None
367
921
self.checker_initiator_tag = None
368
922
self.disable_initiator_tag = None
369
self.expires = None
370
923
self.checker_callback_tag = None
371
self.checker_command = config["checker"]
372
924
self.current_checker_command = None
373
self.last_connect = None
374
self._approved = None
375
self.approved_by_default = config.get("approved_by_default",
376
True)
925
self.approved = None
377
926
self.approvals_pending = 0
378
self.approval_delay = string_to_delta(
379
config["approval_delay"])
380
self.approval_duration = string_to_delta(
381
config["approval_duration"])
382
self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())
383
927
self.changedstate = multiprocessing_manager.Condition(
928
multiprocessing_manager.Lock())
929
self.client_structure = [attr
930
for attr in self.__dict__.keys()
931
if not attr.startswith("_")]
932
self.client_structure.append("client_structure")
933
934
for name, t in inspect.getmembers(
935
type(self), lambda obj: isinstance(obj, property)):
936
if not name.startswith("_"):
937
self.client_structure.append(name)
938
939
# Send notice to process children that client state has changed
384
940
def send_changedstate(self):
385
self.changedstate.acquire()
386
self.changedstate.notify_all()
387
self.changedstate.release()
388
941
with self.changedstate:
942
self.changedstate.notify_all()
943
389
944
def enable(self):
390
945
"""Start this client's checker and timeout hooks"""
391
946
if getattr(self, "enabled", False):
392
947
# Already enabled
393
948
return
394
self.send_changedstate()
395
# Schedule a new checker to be started an 'interval' from now,
396
# and every interval from then on.
397
self.checker_initiator_tag = (gobject.timeout_add
398
(self.interval_milliseconds(),
399
self.start_checker))
400
# Schedule a disable() when 'timeout' has passed
401
949
self.expires = datetime.datetime.utcnow() + self.timeout
402
self.disable_initiator_tag = (gobject.timeout_add
403
(self.timeout_milliseconds(),
404
self.disable))
405
950
self.enabled = True
406
951
self.last_enabled = datetime.datetime.utcnow()
407
# Also start a new checker *right now*.
408
self.start_checker()
409
952
self.init_checker()
953
self.send_changedstate()
954
410
955
def disable(self, quiet=True):
411
956
"""Disable this client."""
412
957
if not getattr(self, "enabled", False):
413
958
return False
414
959
if not quiet:
415
self.send_changedstate()
416
if not quiet:
417
960
logger.info("Disabling client %s", self.name)
418
if getattr(self, "disable_initiator_tag", False):
419
gobject.source_remove(self.disable_initiator_tag)
961
if getattr(self, "disable_initiator_tag", None) is not None:
962
GLib.source_remove(self.disable_initiator_tag)
420
963
self.disable_initiator_tag = None
421
964
self.expires = None
422
if getattr(self, "checker_initiator_tag", False):
423
gobject.source_remove(self.checker_initiator_tag)
965
if getattr(self, "checker_initiator_tag", None) is not None:
966
GLib.source_remove(self.checker_initiator_tag)
424
967
self.checker_initiator_tag = None
425
968
self.stop_checker()
426
if self.disable_hook:
427
self.disable_hook(self)
428
969
self.enabled = False
429
# Do not run this again if called by a gobject.timeout_add
970
if not quiet:
971
self.send_changedstate()
972
# Do not run this again if called by a GLib.timeout_add
430
973
return False
431
974
432
975
def __del__(self):
433
self.disable_hook = None
434
976
self.disable()
435
436
def checker_callback(self, pid, condition, command):
977
978
def init_checker(self):
979
# Schedule a new checker to be started an 'interval' from now,
980
# and every interval from then on.
981
if self.checker_initiator_tag is not None:
982
GLib.source_remove(self.checker_initiator_tag)
983
self.checker_initiator_tag = GLib.timeout_add(
984
int(self.interval.total_seconds() * 1000),
985
self.start_checker)
986
# Schedule a disable() when 'timeout' has passed
987
if self.disable_initiator_tag is not None:
988
GLib.source_remove(self.disable_initiator_tag)
989
self.disable_initiator_tag = GLib.timeout_add(
990
int(self.timeout.total_seconds() * 1000), self.disable)
991
# Also start a new checker *right now*.
992
self.start_checker()
993
994
def checker_callback(self, source, condition, connection,
995
command):
437
996
"""The checker has completed, so take appropriate actions."""
438
997
self.checker_callback_tag = None
439
998
self.checker = None
440
if os.WIFEXITED(condition):
441
exitstatus = os.WEXITSTATUS(condition)
442
if exitstatus == 0:
999
# Read return code from connection (see call_pipe)
1000
returncode = connection.recv()
1001
connection.close()
1002
1003
if returncode >= 0:
1004
self.last_checker_status = returncode
1005
self.last_checker_signal = None
1006
if self.last_checker_status == 0:
443
1007
logger.info("Checker for %(name)s succeeded",
444
1008
vars(self))
445
1009
self.checked_ok()
446
1010
else:
447
logger.info("Checker for %(name)s failed",
448
vars(self))
1011
logger.info("Checker for %(name)s failed", vars(self))
449
1012
else:
1013
self.last_checker_status = -1
1014
self.last_checker_signal = -returncode
450
1015
logger.warning("Checker for %(name)s crashed?",
451
1016
vars(self))
452
453
def checked_ok(self, timeout=None):
454
"""Bump up the timeout for this client.
455
456
This should only be called when the client has been seen,
457
alive and well.
458
"""
1017
return False
1018
1019
def checked_ok(self):
1020
"""Assert that the client has been seen, alive and well."""
1021
self.last_checked_ok = datetime.datetime.utcnow()
1022
self.last_checker_status = 0
1023
self.last_checker_signal = None
1024
self.bump_timeout()
1025
1026
def bump_timeout(self, timeout=None):
1027
"""Bump up the timeout for this client."""
459
1028
if timeout is None:
460
1029
timeout = self.timeout
461
self.last_checked_ok = datetime.datetime.utcnow()
462
gobject.source_remove(self.disable_initiator_tag)
463
self.expires = datetime.datetime.utcnow() + timeout
464
self.disable_initiator_tag = (gobject.timeout_add
465
(_timedelta_to_milliseconds(timeout),
466
self.disable))
467
1030
if self.disable_initiator_tag is not None:
1031
GLib.source_remove(self.disable_initiator_tag)
1032
self.disable_initiator_tag = None
1033
if getattr(self, "enabled", False):
1034
self.disable_initiator_tag = GLib.timeout_add(
1035
int(timeout.total_seconds() * 1000), self.disable)
1036
self.expires = datetime.datetime.utcnow() + timeout
1037
468
1038
def need_approval(self):
469
1039
self.last_approval_request = datetime.datetime.utcnow()
470
1040
471
1041
def start_checker(self):
472
1042
"""Start a new checker subprocess if one is not running.
473
1043
474
1044
If a checker already exists, leave it running and do
475
1045
nothing."""
476
1046
# The reason for not killing a running checker is that if we
477
# did that, then if a checker (for some reason) started
478
# running slowly and taking more than 'interval' time, the
479
# client would inevitably timeout, since no checker would get
480
# a chance to run to completion. If we instead leave running
1047
# did that, and if a checker (for some reason) started running
1048
# slowly and taking more than 'interval' time, then the client
1049
# would inevitably timeout, since no checker would get a
1050
# chance to run to completion. If we instead leave running
481
1051
# checkers alone, the checker would have to take more time
482
1052
# than 'timeout' for the client to be disabled, which is as it
483
1053
# should be.
484
485
# If a checker exists, make sure it is not a zombie
486
try:
487
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
488
except (AttributeError, OSError) as error:
489
if (isinstance(error, OSError)
490
and error.errno != errno.ECHILD):
491
raise error
492
else:
493
if pid:
494
logger.warning("Checker was a zombie")
495
gobject.source_remove(self.checker_callback_tag)
496
self.checker_callback(pid, status,
497
self.current_checker_command)
1054
1055
if self.checker is not None and not self.checker.is_alive():
1056
logger.warning("Checker was not alive; joining")
1057
self.checker.join()
1058
self.checker = None
498
1059
# Start a new checker if needed
499
1060
if self.checker is None:
1061
# Escape attributes for the shell
1062
escaped_attrs = {
1063
attr: re.escape(str(getattr(self, attr)))
1064
for attr in self.runtime_expansions}
500
1065
try:
501
# In case checker_command has exactly one % operator
502
command = self.checker_command % self.host
503
except TypeError:
504
# Escape attributes for the shell
505
escaped_attrs = dict(
506
(attr,
507
re.escape(unicode(str(getattr(self, attr, "")),
508
errors=
509
'replace')))
510
for attr in
511
self.runtime_expansions)
512
513
try:
514
command = self.checker_command % escaped_attrs
515
except TypeError as error:
516
logger.error('Could not format string "%s":'
517
' %s', self.checker_command, error)
518
return True # Try again later
1066
command = self.checker_command % escaped_attrs
1067
except TypeError as error:
1068
logger.error('Could not format string "%s"',
1069
self.checker_command,
1070
exc_info=error)
1071
return True # Try again later
519
1072
self.current_checker_command = command
520
try:
521
logger.info("Starting checker %r for %s",
522
command, self.name)
523
# We don't need to redirect stdout and stderr, since
524
# in normal mode, that is already done by daemon(),
525
# and in debug mode we don't want to. (Stdin is
526
# always replaced by /dev/null.)
527
self.checker = subprocess.Popen(command,
528
close_fds=True,
529
shell=True, cwd="/")
530
self.checker_callback_tag = (gobject.child_watch_add
531
(self.checker.pid,
532
self.checker_callback,
533
data=command))
534
# The checker may have completed before the gobject
535
# watch was added. Check for this.
536
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
537
if pid:
538
gobject.source_remove(self.checker_callback_tag)
539
self.checker_callback(pid, status, command)
540
except OSError as error:
541
logger.error("Failed to start subprocess: %s",
542
error)
543
# Re-run this periodically if run by gobject.timeout_add
1073
logger.info("Starting checker %r for %s", command,
1074
self.name)
1075
# We don't need to redirect stdout and stderr, since
1076
# in normal mode, that is already done by daemon(),
1077
# and in debug mode we don't want to. (Stdin is
1078
# always replaced by /dev/null.)
1079
# The exception is when not debugging but nevertheless
1080
# running in the foreground; use the previously
1081
# created wnull.
1082
popen_args = {"close_fds": True,
1083
"shell": True,
1084
"cwd": "/"}
1085
if (not self.server_settings["debug"]
1086
and self.server_settings["foreground"]):
1087
popen_args.update({"stdout": wnull,
1088
"stderr": wnull})
1089
pipe = multiprocessing.Pipe(duplex=False)
1090
self.checker = multiprocessing.Process(
1091
target=call_pipe,
1092
args=(pipe[1], subprocess.call, command),
1093
kwargs=popen_args)
1094
self.checker.start()
1095
self.checker_callback_tag = GLib.io_add_watch(
1096
pipe[0].fileno(), GLib.IO_IN,
1097
self.checker_callback, pipe[0], command)
1098
# Re-run this periodically if run by GLib.timeout_add
544
1099
return True
545
1100
546
1101
def stop_checker(self):
547
1102
"""Force the checker process, if any, to stop."""
548
1103
if self.checker_callback_tag:
549
gobject.source_remove(self.checker_callback_tag)
1104
GLib.source_remove(self.checker_callback_tag)
550
1105
self.checker_callback_tag = None
551
1106
if getattr(self, "checker", None) is None:
552
1107
return
553
1108
logger.debug("Stopping checker for %(name)s", vars(self))
554
try:
555
os.kill(self.checker.pid, signal.SIGTERM)
556
#time.sleep(0.5)
557
#if self.checker.poll() is None:
558
# os.kill(self.checker.pid, signal.SIGKILL)
559
except OSError as error:
560
if error.errno != errno.ESRCH: # No such process
561
raise
1109
self.checker.terminate()
562
1110
self.checker = None
563
1111
564
1112
565
def dbus_service_property(dbus_interface, signature="v",
566
access="readwrite", byte_arrays=False):
1113
def dbus_service_property(dbus_interface,
1114
signature="v",
1115
access="readwrite",
1116
byte_arrays=False):
567
1117
"""Decorators for marking methods of a DBusObjectWithProperties to
568
1118
become properties on the D-Bus.
569
1119
570
1120
The decorated method will be called with no arguments by "Get"
571
1121
and with one argument by "Set".
572
1122
573
1123
The parameters, where they are supported, are the same as
574
1124
dbus.service.method, except there is only "signature", since the
575
1125
type from Get() and the type sent to Set() is the same.
578
1128
# "Set" method, so we fail early here:
579
1129
if byte_arrays and signature != "ay":
580
1130
raise ValueError("Byte arrays not supported for non-'ay'"
581
" signature %r" % signature)
1131
" signature {!r}".format(signature))
1132
582
1133
def decorator(func):
583
1134
func._dbus_is_property = True
584
1135
func._dbus_interface = dbus_interface
587
1138
func._dbus_name = func.__name__
588
1139
if func._dbus_name.endswith("_dbus_property"):
589
1140
func._dbus_name = func._dbus_name[:-14]
590
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
591
return func
1141
func._dbus_get_args_options = {'byte_arrays': byte_arrays}
1142
return func
1143
1144
return decorator
1145
1146
1147
def dbus_interface_annotations(dbus_interface):
1148
"""Decorator for marking functions returning interface annotations
1149
1150
Usage:
1151
1152
@dbus_interface_annotations("org.example.Interface")
1153
def _foo(self): # Function name does not matter
1154
return {"org.freedesktop.DBus.Deprecated": "true",
1155
"org.freedesktop.DBus.Property.EmitsChangedSignal":
1156
"false"}
1157
"""
1158
1159
def decorator(func):
1160
func._dbus_is_interface = True
1161
func._dbus_interface = dbus_interface
1162
func._dbus_name = dbus_interface
1163
return func
1164
1165
return decorator
1166
1167
1168
def dbus_annotations(annotations):
1169
"""Decorator to annotate D-Bus methods, signals or properties
1170
Usage:
1171
1172
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
1173
"org.freedesktop.DBus.Property."
1174
"EmitsChangedSignal": "false"})
1175
@dbus_service_property("org.example.Interface", signature="b",
1176
access="r")
1177
def Property_dbus_property(self):
1178
return dbus.Boolean(False)
1179
1180
See also the DBusObjectWithAnnotations class.
1181
"""
1182
1183
def decorator(func):
1184
func._dbus_annotations = annotations
1185
return func
1186
592
1187
return decorator
593
1188
594
1189
595
1190
class DBusPropertyException(dbus.exceptions.DBusException):
596
1191
"""A base class for D-Bus property-related exceptions
597
1192
"""
598
def __unicode__(self):
599
return unicode(str(self))
1193
pass
600
1194
601
1195
602
1196
class DBusPropertyAccessException(DBusPropertyException):
611
1205
pass
612
1206
613
1207
614
class DBusObjectWithProperties(dbus.service.Object):
1208
class DBusObjectWithAnnotations(dbus.service.Object):
1209
"""A D-Bus object with annotations.
1210
1211
Classes inheriting from this can use the dbus_annotations
1212
decorator to add annotations to methods or signals.
1213
"""
1214
1215
@staticmethod
1216
def _is_dbus_thing(thing):
1217
"""Returns a function testing if an attribute is a D-Bus thing
1218
1219
If called like _is_dbus_thing("method") it returns a function
1220
suitable for use as predicate to inspect.getmembers().
1221
"""
1222
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
1223
False)
1224
1225
def _get_all_dbus_things(self, thing):
1226
"""Returns a generator of (name, attribute) pairs
1227
"""
1228
return ((getattr(athing.__get__(self), "_dbus_name", name),
1229
athing.__get__(self))
1230
for cls in self.__class__.__mro__
1231
for name, athing in
1232
inspect.getmembers(cls, self._is_dbus_thing(thing)))
1233
1234
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1235
out_signature="s",
1236
path_keyword='object_path',
1237
connection_keyword='connection')
1238
def Introspect(self, object_path, connection):
1239
"""Overloading of standard D-Bus method.
1240
1241
Inserts annotation tags on methods and signals.
1242
"""
1243
xmlstring = dbus.service.Object.Introspect(self, object_path,
1244
connection)
1245
try:
1246
document = xml.dom.minidom.parseString(xmlstring)
1247
1248
for if_tag in document.getElementsByTagName("interface"):
1249
# Add annotation tags
1250
for typ in ("method", "signal"):
1251
for tag in if_tag.getElementsByTagName(typ):
1252
annots = dict()
1253
for name, prop in (self.
1254
_get_all_dbus_things(typ)):
1255
if (name == tag.getAttribute("name")
1256
and prop._dbus_interface
1257
== if_tag.getAttribute("name")):
1258
annots.update(getattr(
1259
prop, "_dbus_annotations", {}))
1260
for name, value in annots.items():
1261
ann_tag = document.createElement(
1262
"annotation")
1263
ann_tag.setAttribute("name", name)
1264
ann_tag.setAttribute("value", value)
1265
tag.appendChild(ann_tag)
1266
# Add interface annotation tags
1267
for annotation, value in dict(
1268
itertools.chain.from_iterable(
1269
annotations().items()
1270
for name, annotations
1271
in self._get_all_dbus_things("interface")
1272
if name == if_tag.getAttribute("name")
1273
)).items():
1274
ann_tag = document.createElement("annotation")
1275
ann_tag.setAttribute("name", annotation)
1276
ann_tag.setAttribute("value", value)
1277
if_tag.appendChild(ann_tag)
1278
# Fix argument name for the Introspect method itself
1279
if (if_tag.getAttribute("name")
1280
== dbus.INTROSPECTABLE_IFACE):
1281
for cn in if_tag.getElementsByTagName("method"):
1282
if cn.getAttribute("name") == "Introspect":
1283
for arg in cn.getElementsByTagName("arg"):
1284
if (arg.getAttribute("direction")
1285
== "out"):
1286
arg.setAttribute("name",
1287
"xml_data")
1288
xmlstring = document.toxml("utf-8")
1289
document.unlink()
1290
except (AttributeError, xml.dom.DOMException,
1291
xml.parsers.expat.ExpatError) as error:
1292
logger.error("Failed to override Introspection method",
1293
exc_info=error)
1294
return xmlstring
1295
1296
1297
class DBusObjectWithProperties(DBusObjectWithAnnotations):
615
1298
"""A D-Bus object with properties.
616
1299
617
1300
Classes inheriting from this can use the dbus_service_property
618
1301
decorator to expose methods as D-Bus properties. It exposes the
619
1302
standard Get(), Set(), and GetAll() methods on the D-Bus.
620
1303
"""
621
622
@staticmethod
623
def _is_dbus_property(obj):
624
return getattr(obj, "_dbus_is_property", False)
625
626
def _get_all_dbus_properties(self):
627
"""Returns a generator of (name, attribute) pairs
628
"""
629
return ((prop._dbus_name, prop)
630
for name, prop in
631
inspect.getmembers(self, self._is_dbus_property))
632
1304
633
1305
def _get_dbus_property(self, interface_name, property_name):
634
1306
"""Returns a bound method if one exists which is a D-Bus
635
1307
property with the specified name and interface.
636
1308
"""
637
for name in (property_name,
638
property_name + "_dbus_property"):
639
prop = getattr(self, name, None)
640
if (prop is None
641
or not self._is_dbus_property(prop)
642
or prop._dbus_name != property_name
643
or (interface_name and prop._dbus_interface
644
and interface_name != prop._dbus_interface)):
645
continue
646
return prop
1309
for cls in self.__class__.__mro__:
1310
for name, value in inspect.getmembers(
1311
cls, self._is_dbus_thing("property")):
1312
if (value._dbus_name == property_name
1313
and value._dbus_interface == interface_name):
1314
return value.__get__(self)
1315
647
1316
# No such property
648
raise DBusPropertyNotFound(self.dbus_object_path + ":"
649
+ interface_name + "."
650
+ property_name)
651
652
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
1317
raise DBusPropertyNotFound("{}:{}.{}".format(
1318
self.dbus_object_path, interface_name, property_name))
1319
1320
@classmethod
1321
def _get_all_interface_names(cls):
1322
"""Get a sequence of all interfaces supported by an object"""
1323
return (name for name in set(getattr(getattr(x, attr),
1324
"_dbus_interface", None)
1325
for x in (inspect.getmro(cls))
1326
for attr in dir(x))
1327
if name is not None)
1328
1329
@dbus.service.method(dbus.PROPERTIES_IFACE,
1330
in_signature="ss",
653
1331
out_signature="v")
654
1332
def Get(self, interface_name, property_name):
655
1333
"""Standard D-Bus property Get() method, see D-Bus standard.
661
1339
if not hasattr(value, "variant_level"):
662
1340
return value
663
1341
return type(value)(value, variant_level=value.variant_level+1)
664
1342
665
1343
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
666
1344
def Set(self, interface_name, property_name, value):
667
1345
"""Standard D-Bus property Set() method, see D-Bus standard.
673
1351
# The byte_arrays option is not supported yet on
674
1352
# signatures other than "ay".
675
1353
if prop._dbus_signature != "ay":
676
raise ValueError
677
value = dbus.ByteArray(''.join(unichr(byte)
678
for byte in value))
1354
raise ValueError("Byte arrays not supported for non-"
1355
"'ay' signature {!r}"
1356
.format(prop._dbus_signature))
1357
value = dbus.ByteArray(b''.join(chr(byte)
1358
for byte in value))
679
1359
prop(value)
680
681
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
1360
1361
@dbus.service.method(dbus.PROPERTIES_IFACE,
1362
in_signature="s",
682
1363
out_signature="a{sv}")
683
1364
def GetAll(self, interface_name):
684
1365
"""Standard D-Bus property GetAll() method, see D-Bus
685
1366
standard.
686
1367
687
1368
Note: Will not include properties with access="write".
688
1369
"""
689
all = {}
690
for name, prop in self._get_all_dbus_properties():
1370
properties = {}
1371
for name, prop in self._get_all_dbus_things("property"):
691
1372
if (interface_name
692
1373
and interface_name != prop._dbus_interface):
693
1374
# Interface non-empty but did not match
697
1378
continue
698
1379
value = prop()
699
1380
if not hasattr(value, "variant_level"):
700
all[name] = value
1381
properties[name] = value
701
1382
continue
702
all[name] = type(value)(value, variant_level=
703
value.variant_level+1)
704
return dbus.Dictionary(all, signature="sv")
705
1383
properties[name] = type(value)(
1384
value, variant_level=value.variant_level + 1)
1385
return dbus.Dictionary(properties, signature="sv")
1386
1387
@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
1388
def PropertiesChanged(self, interface_name, changed_properties,
1389
invalidated_properties):
1390
"""Standard D-Bus PropertiesChanged() signal, see D-Bus
1391
standard.
1392
"""
1393
pass
1394
706
1395
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
707
1396
out_signature="s",
708
1397
path_keyword='object_path',
709
1398
connection_keyword='connection')
710
1399
def Introspect(self, object_path, connection):
711
"""Standard D-Bus method, overloaded to insert property tags.
1400
"""Overloading of standard D-Bus method.
1401
1402
Inserts property tags and interface annotation tags.
712
1403
"""
713
xmlstring = dbus.service.Object.Introspect(self, object_path,
714
connection)
1404
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1405
object_path,
1406
connection)
715
1407
try:
716
1408
document = xml.dom.minidom.parseString(xmlstring)
1409
717
1410
def make_tag(document, name, prop):
718
1411
e = document.createElement("property")
719
1412
e.setAttribute("name", name)
720
1413
e.setAttribute("type", prop._dbus_signature)
721
1414
e.setAttribute("access", prop._dbus_access)
722
1415
return e
1416
723
1417
for if_tag in document.getElementsByTagName("interface"):
1418
# Add property tags
724
1419
for tag in (make_tag(document, name, prop)
725
1420
for name, prop
726
in self._get_all_dbus_properties()
1421
in self._get_all_dbus_things("property")
727
1422
if prop._dbus_interface
728
1423
== if_tag.getAttribute("name")):
729
1424
if_tag.appendChild(tag)
1425
# Add annotation tags for properties
1426
for tag in if_tag.getElementsByTagName("property"):
1427
annots = dict()
1428
for name, prop in self._get_all_dbus_things(
1429
"property"):
1430
if (name == tag.getAttribute("name")
1431
and prop._dbus_interface
1432
== if_tag.getAttribute("name")):
1433
annots.update(getattr(
1434
prop, "_dbus_annotations", {}))
1435
for name, value in annots.items():
1436
ann_tag = document.createElement(
1437
"annotation")
1438
ann_tag.setAttribute("name", name)
1439
ann_tag.setAttribute("value", value)
1440
tag.appendChild(ann_tag)
730
1441
# Add the names to the return values for the
731
1442
# "org.freedesktop.DBus.Properties" methods
732
1443
if (if_tag.getAttribute("name")
747
1458
except (AttributeError, xml.dom.DOMException,
748
1459
xml.parsers.expat.ExpatError) as error:
749
1460
logger.error("Failed to override Introspection method",
750
error)
751
return xmlstring
752
753
754
def datetime_to_dbus (dt, variant_level=0):
1461
exc_info=error)
1462
return xmlstring
1463
1464
1465
try:
1466
dbus.OBJECT_MANAGER_IFACE
1467
except AttributeError:
1468
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1469
1470
1471
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1472
"""A D-Bus object with an ObjectManager.
1473
1474
Classes inheriting from this exposes the standard
1475
GetManagedObjects call and the InterfacesAdded and
1476
InterfacesRemoved signals on the standard
1477
"org.freedesktop.DBus.ObjectManager" interface.
1478
1479
Note: No signals are sent automatically; they must be sent
1480
manually.
1481
"""
1482
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1483
out_signature="a{oa{sa{sv}}}")
1484
def GetManagedObjects(self):
1485
"""This function must be overridden"""
1486
raise NotImplementedError()
1487
1488
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1489
signature="oa{sa{sv}}")
1490
def InterfacesAdded(self, object_path, interfaces_and_properties):
1491
pass
1492
1493
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1494
def InterfacesRemoved(self, object_path, interfaces):
1495
pass
1496
1497
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1498
out_signature="s",
1499
path_keyword='object_path',
1500
connection_keyword='connection')
1501
def Introspect(self, object_path, connection):
1502
"""Overloading of standard D-Bus method.
1503
1504
Override return argument name of GetManagedObjects to be
1505
"objpath_interfaces_and_properties"
1506
"""
1507
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1508
object_path,
1509
connection)
1510
try:
1511
document = xml.dom.minidom.parseString(xmlstring)
1512
1513
for if_tag in document.getElementsByTagName("interface"):
1514
# Fix argument name for the GetManagedObjects method
1515
if (if_tag.getAttribute("name")
1516
== dbus.OBJECT_MANAGER_IFACE):
1517
for cn in if_tag.getElementsByTagName("method"):
1518
if (cn.getAttribute("name")
1519
== "GetManagedObjects"):
1520
for arg in cn.getElementsByTagName("arg"):
1521
if (arg.getAttribute("direction")
1522
== "out"):
1523
arg.setAttribute(
1524
"name",
1525
"objpath_interfaces"
1526
"_and_properties")
1527
xmlstring = document.toxml("utf-8")
1528
document.unlink()
1529
except (AttributeError, xml.dom.DOMException,
1530
xml.parsers.expat.ExpatError) as error:
1531
logger.error("Failed to override Introspection method",
1532
exc_info=error)
1533
return xmlstring
1534
1535
1536
def datetime_to_dbus(dt, variant_level=0):
755
1537
"""Convert a UTC datetime.datetime() to a D-Bus type."""
756
1538
if dt is None:
757
return dbus.String("", variant_level = variant_level)
758
return dbus.String(dt.isoformat(),
759
variant_level=variant_level)
760
761
1539
return dbus.String("", variant_level=variant_level)
1540
return dbus.String(dt.isoformat(), variant_level=variant_level)
1541
1542
1543
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1544
"""A class decorator; applied to a subclass of
1545
dbus.service.Object, it will add alternate D-Bus attributes with
1546
interface names according to the "alt_interface_names" mapping.
1547
Usage:
1548
1549
@alternate_dbus_interfaces({"org.example.Interface":
1550
"net.example.AlternateInterface"})
1551
class SampleDBusObject(dbus.service.Object):
1552
@dbus.service.method("org.example.Interface")
1553
def SampleDBusMethod():
1554
pass
1555
1556
The above "SampleDBusMethod" on "SampleDBusObject" will be
1557
reachable via two interfaces: "org.example.Interface" and
1558
"net.example.AlternateInterface", the latter of which will have
1559
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1560
"true", unless "deprecate" is passed with a False value.
1561
1562
This works for methods and signals, and also for D-Bus properties
1563
(from DBusObjectWithProperties) and interfaces (from the
1564
dbus_interface_annotations decorator).
1565
"""
1566
1567
def wrapper(cls):
1568
for orig_interface_name, alt_interface_name in (
1569
alt_interface_names.items()):
1570
attr = {}
1571
interface_names = set()
1572
# Go though all attributes of the class
1573
for attrname, attribute in inspect.getmembers(cls):
1574
# Ignore non-D-Bus attributes, and D-Bus attributes
1575
# with the wrong interface name
1576
if (not hasattr(attribute, "_dbus_interface")
1577
or not attribute._dbus_interface.startswith(
1578
orig_interface_name)):
1579
continue
1580
# Create an alternate D-Bus interface name based on
1581
# the current name
1582
alt_interface = attribute._dbus_interface.replace(
1583
orig_interface_name, alt_interface_name)
1584
interface_names.add(alt_interface)
1585
# Is this a D-Bus signal?
1586
if getattr(attribute, "_dbus_is_signal", False):
1587
# Extract the original non-method undecorated
1588
# function by black magic
1589
if sys.version_info.major == 2:
1590
nonmethod_func = (dict(
1591
zip(attribute.func_code.co_freevars,
1592
attribute.__closure__))
1593
["func"].cell_contents)
1594
else:
1595
nonmethod_func = (dict(
1596
zip(attribute.__code__.co_freevars,
1597
attribute.__closure__))
1598
["func"].cell_contents)
1599
# Create a new, but exactly alike, function
1600
# object, and decorate it to be a new D-Bus signal
1601
# with the alternate D-Bus interface name
1602
new_function = copy_function(nonmethod_func)
1603
new_function = (dbus.service.signal(
1604
alt_interface,
1605
attribute._dbus_signature)(new_function))
1606
# Copy annotations, if any
1607
try:
1608
new_function._dbus_annotations = dict(
1609
attribute._dbus_annotations)
1610
except AttributeError:
1611
pass
1612
1613
# Define a creator of a function to call both the
1614
# original and alternate functions, so both the
1615
# original and alternate signals gets sent when
1616
# the function is called
1617
def fixscope(func1, func2):
1618
"""This function is a scope container to pass
1619
func1 and func2 to the "call_both" function
1620
outside of its arguments"""
1621
1622
@functools.wraps(func2)
1623
def call_both(*args, **kwargs):
1624
"""This function will emit two D-Bus
1625
signals by calling func1 and func2"""
1626
func1(*args, **kwargs)
1627
func2(*args, **kwargs)
1628
# Make wrapper function look like a D-Bus
1629
# signal
1630
for name, attr in inspect.getmembers(func2):
1631
if name.startswith("_dbus_"):
1632
setattr(call_both, name, attr)
1633
1634
return call_both
1635
# Create the "call_both" function and add it to
1636
# the class
1637
attr[attrname] = fixscope(attribute, new_function)
1638
# Is this a D-Bus method?
1639
elif getattr(attribute, "_dbus_is_method", False):
1640
# Create a new, but exactly alike, function
1641
# object. Decorate it to be a new D-Bus method
1642
# with the alternate D-Bus interface name. Add it
1643
# to the class.
1644
attr[attrname] = (
1645
dbus.service.method(
1646
alt_interface,
1647
attribute._dbus_in_signature,
1648
attribute._dbus_out_signature)
1649
(copy_function(attribute)))
1650
# Copy annotations, if any
1651
try:
1652
attr[attrname]._dbus_annotations = dict(
1653
attribute._dbus_annotations)
1654
except AttributeError:
1655
pass
1656
# Is this a D-Bus property?
1657
elif getattr(attribute, "_dbus_is_property", False):
1658
# Create a new, but exactly alike, function
1659
# object, and decorate it to be a new D-Bus
1660
# property with the alternate D-Bus interface
1661
# name. Add it to the class.
1662
attr[attrname] = (dbus_service_property(
1663
alt_interface, attribute._dbus_signature,
1664
attribute._dbus_access,
1665
attribute._dbus_get_args_options
1666
["byte_arrays"])
1667
(copy_function(attribute)))
1668
# Copy annotations, if any
1669
try:
1670
attr[attrname]._dbus_annotations = dict(
1671
attribute._dbus_annotations)
1672
except AttributeError:
1673
pass
1674
# Is this a D-Bus interface?
1675
elif getattr(attribute, "_dbus_is_interface", False):
1676
# Create a new, but exactly alike, function
1677
# object. Decorate it to be a new D-Bus interface
1678
# with the alternate D-Bus interface name. Add it
1679
# to the class.
1680
attr[attrname] = (
1681
dbus_interface_annotations(alt_interface)
1682
(copy_function(attribute)))
1683
if deprecate:
1684
# Deprecate all alternate interfaces
1685
iname = "_AlternateDBusNames_interface_annotation{}"
1686
for interface_name in interface_names:
1687
1688
@dbus_interface_annotations(interface_name)
1689
def func(self):
1690
return {"org.freedesktop.DBus.Deprecated":
1691
"true"}
1692
# Find an unused name
1693
for aname in (iname.format(i)
1694
for i in itertools.count()):
1695
if aname not in attr:
1696
attr[aname] = func
1697
break
1698
if interface_names:
1699
# Replace the class with a new subclass of it with
1700
# methods, signals, etc. as created above.
1701
if sys.version_info.major == 2:
1702
cls = type(b"{}Alternate".format(cls.__name__),
1703
(cls, ), attr)
1704
else:
1705
cls = type("{}Alternate".format(cls.__name__),
1706
(cls, ), attr)
1707
return cls
1708
1709
return wrapper
1710
1711
1712
@alternate_dbus_interfaces({"se.recompile.Mandos":
1713
"se.bsnet.fukt.Mandos"})
762
1714
class ClientDBus(Client, DBusObjectWithProperties):
763
1715
"""A Client class using D-Bus
764
1716
765
1717
Attributes:
766
1718
dbus_object_path: dbus.ObjectPath
767
1719
bus: dbus.SystemBus()
768
1720
"""
769
1721
770
1722
runtime_expansions = (Client.runtime_expansions
771
+ ("dbus_object_path",))
772
1723
+ ("dbus_object_path", ))
1724
1725
_interface = "se.recompile.Mandos.Client"
1726
773
1727
# dbus.service.Object doesn't use super(), so we can't either.
774
775
def __init__(self, bus = None, *args, **kwargs):
776
self._approvals_pending = 0
1728
1729
def __init__(self, bus=None, *args, **kwargs):
777
1730
self.bus = bus
778
1731
Client.__init__(self, *args, **kwargs)
779
1732
# Only now, when this client is initialized, can it show up on
780
1733
# the D-Bus
781
client_object_name = unicode(self.name).translate(
1734
client_object_name = str(self.name).translate(
782
1735
{ord("."): ord("_"),
783
1736
ord("-"): ord("_")})
784
self.dbus_object_path = (dbus.ObjectPath
785
("/clients/" + client_object_name))
1737
self.dbus_object_path = dbus.ObjectPath(
1738
"/clients/" + client_object_name)
786
1739
DBusObjectWithProperties.__init__(self, self.bus,
787
1740
self.dbus_object_path)
788
789
def notifychangeproperty(transform_func,
790
dbus_name, type_func=lambda x: x,
791
variant_level=1):
792
""" Modify a variable so that its a property that announce its
793
changes to DBus.
794
transform_fun: Function that takes a value and transform it to
795
DBus type.
796
dbus_name: DBus name of the variable
1741
1742
def notifychangeproperty(transform_func, dbus_name,
1743
type_func=lambda x: x,
1744
variant_level=1,
1745
invalidate_only=False,
1746
_interface=_interface):
1747
""" Modify a variable so that it's a property which announces
1748
its changes to DBus.
1749
1750
transform_fun: Function that takes a value and a variant_level
1751
and transforms it to a D-Bus type.
1752
dbus_name: D-Bus name of the variable
797
1753
type_func: Function that transform the value before sending it
798
to DBus
799
variant_level: DBus variant level. default: 1
1754
to the D-Bus. Default: no transform
1755
variant_level: D-Bus variant level. Default: 1
800
1756
"""
801
real_value = [None,]
1757
attrname = "_{}".format(dbus_name)
1758
802
1759
def setter(self, value):
803
old_value = real_value[0]
804
real_value[0] = value
805
1760
if hasattr(self, "dbus_object_path"):
806
if type_func(old_value) != type_func(real_value[0]):
807
dbus_value = transform_func(type_func(real_value[0]),
808
variant_level)
809
self.PropertyChanged(dbus.String(dbus_name),
810
dbus_value)
811
812
return property(lambda self: real_value[0], setter)
813
814
1761
if (not hasattr(self, attrname) or
1762
type_func(getattr(self, attrname, None))
1763
!= type_func(value)):
1764
if invalidate_only:
1765
self.PropertiesChanged(
1766
_interface, dbus.Dictionary(),
1767
dbus.Array((dbus_name, )))
1768
else:
1769
dbus_value = transform_func(
1770
type_func(value),
1771
variant_level=variant_level)
1772
self.PropertyChanged(dbus.String(dbus_name),
1773
dbus_value)
1774
self.PropertiesChanged(
1775
_interface,
1776
dbus.Dictionary({dbus.String(dbus_name):
1777
dbus_value}),
1778
dbus.Array())
1779
setattr(self, attrname, value)
1780
1781
return property(lambda self: getattr(self, attrname), setter)
1782
815
1783
expires = notifychangeproperty(datetime_to_dbus, "Expires")
816
1784
approvals_pending = notifychangeproperty(dbus.Boolean,
817
1785
"ApprovalPending",
818
type_func = bool)
1786
type_func=bool)
819
1787
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
820
1788
last_enabled = notifychangeproperty(datetime_to_dbus,
821
1789
"LastEnabled")
822
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
823
type_func = lambda checker: checker is not None)
1790
checker = notifychangeproperty(
1791
dbus.Boolean, "CheckerRunning",
1792
type_func=lambda checker: checker is not None)
824
1793
last_checked_ok = notifychangeproperty(datetime_to_dbus,
825
1794
"LastCheckedOK")
826
last_approval_request = notifychangeproperty(datetime_to_dbus,
827
"LastApprovalRequest")
1795
last_checker_status = notifychangeproperty(dbus.Int16,
1796
"LastCheckerStatus")
1797
last_approval_request = notifychangeproperty(
1798
datetime_to_dbus, "LastApprovalRequest")
828
1799
approved_by_default = notifychangeproperty(dbus.Boolean,
829
1800
"ApprovedByDefault")
830
approval_delay = notifychangeproperty(dbus.UInt16, "ApprovalDelay",
831
type_func = _timedelta_to_milliseconds)
832
approval_duration = notifychangeproperty(dbus.UInt16, "ApprovalDuration",
833
type_func = _timedelta_to_milliseconds)
1801
approval_delay = notifychangeproperty(
1802
dbus.UInt64, "ApprovalDelay",
1803
type_func=lambda td: td.total_seconds() * 1000)
1804
approval_duration = notifychangeproperty(
1805
dbus.UInt64, "ApprovalDuration",
1806
type_func=lambda td: td.total_seconds() * 1000)
834
1807
host = notifychangeproperty(dbus.String, "Host")
835
timeout = notifychangeproperty(dbus.UInt16, "Timeout",
836
type_func = _timedelta_to_milliseconds)
837
extended_timeout = notifychangeproperty(dbus.UInt16, "ExtendedTimeout",
838
type_func = _timedelta_to_milliseconds)
839
interval = notifychangeproperty(dbus.UInt16, "Interval",
840
type_func = _timedelta_to_milliseconds)
1808
timeout = notifychangeproperty(
1809
dbus.UInt64, "Timeout",
1810
type_func=lambda td: td.total_seconds() * 1000)
1811
extended_timeout = notifychangeproperty(
1812
dbus.UInt64, "ExtendedTimeout",
1813
type_func=lambda td: td.total_seconds() * 1000)
1814
interval = notifychangeproperty(
1815
dbus.UInt64, "Interval",
1816
type_func=lambda td: td.total_seconds() * 1000)
841
1817
checker_command = notifychangeproperty(dbus.String, "Checker")
842
1818
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1819
invalidate_only=True)
1820
843
1821
del notifychangeproperty
844
1822
845
1823
def __del__(self, *args, **kwargs):
846
1824
try:
847
1825
self.remove_from_connection()
850
1828
if hasattr(DBusObjectWithProperties, "__del__"):
851
1829
DBusObjectWithProperties.__del__(self, *args, **kwargs)
852
1830
Client.__del__(self, *args, **kwargs)
853
854
def checker_callback(self, pid, condition, command,
855
*args, **kwargs):
856
self.checker_callback_tag = None
857
self.checker = None
858
if os.WIFEXITED(condition):
859
exitstatus = os.WEXITSTATUS(condition)
1831
1832
def checker_callback(self, source, condition,
1833
connection, command, *args, **kwargs):
1834
ret = Client.checker_callback(self, source, condition,
1835
connection, command, *args,
1836
**kwargs)
1837
exitstatus = self.last_checker_status
1838
if exitstatus >= 0:
860
1839
# Emit D-Bus signal
861
1840
self.CheckerCompleted(dbus.Int16(exitstatus),
862
dbus.Int64(condition),
1841
# This is specific to GNU libC
1842
dbus.Int64(exitstatus << 8),
863
1843
dbus.String(command))
864
1844
else:
865
1845
# Emit D-Bus signal
866
1846
self.CheckerCompleted(dbus.Int16(-1),
867
dbus.Int64(condition),
1847
dbus.Int64(
1848
# This is specific to GNU libC
1849
(exitstatus << 8)
1850
| self.last_checker_signal),
868
1851
dbus.String(command))
869
870
return Client.checker_callback(self, pid, condition, command,
871
*args, **kwargs)
872
1852
return ret
1853
873
1854
def start_checker(self, *args, **kwargs):
874
old_checker = self.checker
875
if self.checker is not None:
876
old_checker_pid = self.checker.pid
877
else:
878
old_checker_pid = None
1855
old_checker_pid = getattr(self.checker, "pid", None)
879
1856
r = Client.start_checker(self, *args, **kwargs)
880
1857
# Only if new checker process was started
881
1858
if (self.checker is not None
883
1860
# Emit D-Bus signal
884
1861
self.CheckerStarted(self.current_checker_command)
885
1862
return r
886
1863
887
1864
def _reset_approved(self):
888
self._approved = None
1865
self.approved = None
889
1866
return False
890
1867
891
1868
def approve(self, value=True):
1869
self.approved = value
1870
GLib.timeout_add(int(self.approval_duration.total_seconds()
1871
* 1000), self._reset_approved)
892
1872
self.send_changedstate()
893
self._approved = value
894
gobject.timeout_add(_timedelta_to_milliseconds
895
(self.approval_duration),
896
self._reset_approved)
897
898
899
## D-Bus methods, signals & properties
900
_interface = "se.bsnet.fukt.Mandos.Client"
901
902
## Signals
903
1873
1874
# D-Bus methods, signals & properties
1875
1876
# Interfaces
1877
1878
# Signals
1879
904
1880
# CheckerCompleted - signal
905
1881
@dbus.service.signal(_interface, signature="nxs")
906
1882
def CheckerCompleted(self, exitcode, waitstatus, command):
907
1883
"D-Bus signal"
908
1884
pass
909
1885
910
1886
# CheckerStarted - signal
911
1887
@dbus.service.signal(_interface, signature="s")
912
1888
def CheckerStarted(self, command):
913
1889
"D-Bus signal"
914
1890
pass
915
1891
916
1892
# PropertyChanged - signal
1893
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
917
1894
@dbus.service.signal(_interface, signature="sv")
918
1895
def PropertyChanged(self, property, value):
919
1896
"D-Bus signal"
920
1897
pass
921
1898
922
1899
# GotSecret - signal
923
1900
@dbus.service.signal(_interface)
924
1901
def GotSecret(self):
927
1904
server to mandos-client
928
1905
"""
929
1906
pass
930
1907
931
1908
# Rejected - signal
932
1909
@dbus.service.signal(_interface, signature="s")
933
1910
def Rejected(self, reason):
934
1911
"D-Bus signal"
935
1912
pass
936
1913
937
1914
# NeedApproval - signal
938
1915
@dbus.service.signal(_interface, signature="tb")
939
1916
def NeedApproval(self, timeout, default):
940
1917
"D-Bus signal"
941
1918
return self.need_approval()
942
943
## Methods
944
1919
1920
# Methods
1921
945
1922
# Approve - method
946
1923
@dbus.service.method(_interface, in_signature="b")
947
1924
def Approve(self, value):
948
1925
self.approve(value)
949
1926
950
1927
# CheckedOK - method
951
1928
@dbus.service.method(_interface)
952
1929
def CheckedOK(self):
953
1930
self.checked_ok()
954
1931
955
1932
# Enable - method
1933
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
956
1934
@dbus.service.method(_interface)
957
1935
def Enable(self):
958
1936
"D-Bus method"
959
1937
self.enable()
960
1938
961
1939
# StartChecker - method
1940
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
962
1941
@dbus.service.method(_interface)
963
1942
def StartChecker(self):
964
1943
"D-Bus method"
965
1944
self.start_checker()
966
1945
967
1946
# Disable - method
1947
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
968
1948
@dbus.service.method(_interface)
969
1949
def Disable(self):
970
1950
"D-Bus method"
971
1951
self.disable()
972
1952
973
1953
# StopChecker - method
1954
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
974
1955
@dbus.service.method(_interface)
975
1956
def StopChecker(self):
976
1957
self.stop_checker()
977
978
## Properties
979
1958
1959
# Properties
1960
980
1961
# ApprovalPending - property
981
1962
@dbus_service_property(_interface, signature="b", access="read")
982
1963
def ApprovalPending_dbus_property(self):
983
1964
return dbus.Boolean(bool(self.approvals_pending))
984
1965
985
1966
# ApprovedByDefault - property
986
@dbus_service_property(_interface, signature="b",
1967
@dbus_service_property(_interface,
1968
signature="b",
987
1969
access="readwrite")
988
1970
def ApprovedByDefault_dbus_property(self, value=None):
989
1971
if value is None: # get
990
1972
return dbus.Boolean(self.approved_by_default)
991
1973
self.approved_by_default = bool(value)
992
1974
993
1975
# ApprovalDelay - property
994
@dbus_service_property(_interface, signature="t",
1976
@dbus_service_property(_interface,
1977
signature="t",
995
1978
access="readwrite")
996
1979
def ApprovalDelay_dbus_property(self, value=None):
997
1980
if value is None: # get
998
return dbus.UInt64(self.approval_delay_milliseconds())
1981
return dbus.UInt64(self.approval_delay.total_seconds()
1982
* 1000)
999
1983
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1000
1984
1001
1985
# ApprovalDuration - property
1002
@dbus_service_property(_interface, signature="t",
1986
@dbus_service_property(_interface,
1987
signature="t",
1003
1988
access="readwrite")
1004
1989
def ApprovalDuration_dbus_property(self, value=None):
1005
1990
if value is None: # get
1006
return dbus.UInt64(_timedelta_to_milliseconds(
1007
self.approval_duration))
1991
return dbus.UInt64(self.approval_duration.total_seconds()
1992
* 1000)
1008
1993
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1009
1994
1010
1995
# Name - property
1996
@dbus_annotations(
1997
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1011
1998
@dbus_service_property(_interface, signature="s", access="read")
1012
1999
def Name_dbus_property(self):
1013
2000
return dbus.String(self.name)
1014
2001
1015
2002
# Fingerprint - property
2003
@dbus_annotations(
2004
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1016
2005
@dbus_service_property(_interface, signature="s", access="read")
1017
2006
def Fingerprint_dbus_property(self):
1018
2007
return dbus.String(self.fingerprint)
1019
2008
1020
2009
# Host - property
1021
@dbus_service_property(_interface, signature="s",
2010
@dbus_service_property(_interface,
2011
signature="s",
1022
2012
access="readwrite")
1023
2013
def Host_dbus_property(self, value=None):
1024
2014
if value is None: # get
1025
2015
return dbus.String(self.host)
1026
self.host = value
1027
2016
self.host = str(value)
2017
1028
2018
# Created - property
2019
@dbus_annotations(
2020
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1029
2021
@dbus_service_property(_interface, signature="s", access="read")
1030
2022
def Created_dbus_property(self):
1031
return dbus.String(datetime_to_dbus(self.created))
1032
2023
return datetime_to_dbus(self.created)
2024
1033
2025
# LastEnabled - property
1034
2026
@dbus_service_property(_interface, signature="s", access="read")
1035
2027
def LastEnabled_dbus_property(self):
1036
2028
return datetime_to_dbus(self.last_enabled)
1037
2029
1038
2030
# Enabled - property
1039
@dbus_service_property(_interface, signature="b",
2031
@dbus_service_property(_interface,
2032
signature="b",
1040
2033
access="readwrite")
1041
2034
def Enabled_dbus_property(self, value=None):
1042
2035
if value is None: # get
1045
2038
self.enable()
1046
2039
else:
1047
2040
self.disable()
1048
2041
1049
2042
# LastCheckedOK - property
1050
@dbus_service_property(_interface, signature="s",
2043
@dbus_service_property(_interface,
2044
signature="s",
1051
2045
access="readwrite")
1052
2046
def LastCheckedOK_dbus_property(self, value=None):
1053
2047
if value is not None:
1054
2048
self.checked_ok()
1055
2049
return
1056
2050
return datetime_to_dbus(self.last_checked_ok)
1057
2051
2052
# LastCheckerStatus - property
2053
@dbus_service_property(_interface, signature="n", access="read")
2054
def LastCheckerStatus_dbus_property(self):
2055
return dbus.Int16(self.last_checker_status)
2056
1058
2057
# Expires - property
1059
2058
@dbus_service_property(_interface, signature="s", access="read")
1060
2059
def Expires_dbus_property(self):
1061
2060
return datetime_to_dbus(self.expires)
1062
2061
1063
2062
# LastApprovalRequest - property
1064
2063
@dbus_service_property(_interface, signature="s", access="read")
1065
2064
def LastApprovalRequest_dbus_property(self):
1066
2065
return datetime_to_dbus(self.last_approval_request)
1067
2066
1068
2067
# Timeout - property
1069
@dbus_service_property(_interface, signature="t",
2068
@dbus_service_property(_interface,
2069
signature="t",
1070
2070
access="readwrite")
1071
2071
def Timeout_dbus_property(self, value=None):
1072
2072
if value is None: # get
1073
return dbus.UInt64(self.timeout_milliseconds())
2073
return dbus.UInt64(self.timeout.total_seconds() * 1000)
2074
old_timeout = self.timeout
1074
2075
self.timeout = datetime.timedelta(0, 0, 0, value)
1075
if getattr(self, "disable_initiator_tag", None) is None:
1076
return
1077
# Reschedule timeout
1078
gobject.source_remove(self.disable_initiator_tag)
1079
self.disable_initiator_tag = None
1080
self.expires = None
1081
time_to_die = (self.
1082
_timedelta_to_milliseconds((self
1083
.last_checked_ok
1084
+ self.timeout)
1085
- datetime.datetime
1086
.utcnow()))
1087
if time_to_die <= 0:
1088
# The timeout has passed
1089
self.disable()
1090
else:
1091
self.expires = (datetime.datetime.utcnow()
1092
+ datetime.timedelta(milliseconds = time_to_die))
1093
self.disable_initiator_tag = (gobject.timeout_add
1094
(time_to_die, self.disable))
1095
2076
# Reschedule disabling
2077
if self.enabled:
2078
now = datetime.datetime.utcnow()
2079
self.expires += self.timeout - old_timeout
2080
if self.expires <= now:
2081
# The timeout has passed
2082
self.disable()
2083
else:
2084
if (getattr(self, "disable_initiator_tag", None)
2085
is None):
2086
return
2087
GLib.source_remove(self.disable_initiator_tag)
2088
self.disable_initiator_tag = GLib.timeout_add(
2089
int((self.expires - now).total_seconds() * 1000),
2090
self.disable)
2091
1096
2092
# ExtendedTimeout - property
1097
@dbus_service_property(_interface, signature="t",
2093
@dbus_service_property(_interface,
2094
signature="t",
1098
2095
access="readwrite")
1099
2096
def ExtendedTimeout_dbus_property(self, value=None):
1100
2097
if value is None: # get
1101
return dbus.UInt64(self.extended_timeout_milliseconds())
2098
return dbus.UInt64(self.extended_timeout.total_seconds()
2099
* 1000)
1102
2100
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1103
2101
1104
2102
# Interval - property
1105
@dbus_service_property(_interface, signature="t",
2103
@dbus_service_property(_interface,
2104
signature="t",
1106
2105
access="readwrite")
1107
2106
def Interval_dbus_property(self, value=None):
1108
2107
if value is None: # get
1109
return dbus.UInt64(self.interval_milliseconds())
2108
return dbus.UInt64(self.interval.total_seconds() * 1000)
1110
2109
self.interval = datetime.timedelta(0, 0, 0, value)
1111
2110
if getattr(self, "checker_initiator_tag", None) is None:
1112
2111
return
1113
# Reschedule checker run
1114
gobject.source_remove(self.checker_initiator_tag)
1115
self.checker_initiator_tag = (gobject.timeout_add
1116
(value, self.start_checker))
1117
self.start_checker() # Start one now, too
1118
2112
if self.enabled:
2113
# Reschedule checker run
2114
GLib.source_remove(self.checker_initiator_tag)
2115
self.checker_initiator_tag = GLib.timeout_add(
2116
value, self.start_checker)
2117
self.start_checker() # Start one now, too
2118
1119
2119
# Checker - property
1120
@dbus_service_property(_interface, signature="s",
2120
@dbus_service_property(_interface,
2121
signature="s",
1121
2122
access="readwrite")
1122
2123
def Checker_dbus_property(self, value=None):
1123
2124
if value is None: # get
1124
2125
return dbus.String(self.checker_command)
1125
self.checker_command = value
1126
2126
self.checker_command = str(value)
2127
1127
2128
# CheckerRunning - property
1128
@dbus_service_property(_interface, signature="b",
2129
@dbus_service_property(_interface,
2130
signature="b",
1129
2131
access="readwrite")
1130
2132
def CheckerRunning_dbus_property(self, value=None):
1131
2133
if value is None: # get
1134
2136
self.start_checker()
1135
2137
else:
1136
2138
self.stop_checker()
1137
2139
1138
2140
# ObjectPath - property
2141
@dbus_annotations(
2142
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
2143
"org.freedesktop.DBus.Deprecated": "true"})
1139
2144
@dbus_service_property(_interface, signature="o", access="read")
1140
2145
def ObjectPath_dbus_property(self):
1141
return self.dbus_object_path # is already a dbus.ObjectPath
1142
2146
return self.dbus_object_path # is already a dbus.ObjectPath
2147
1143
2148
# Secret = property
1144
@dbus_service_property(_interface, signature="ay",
1145
access="write", byte_arrays=True)
2149
@dbus_annotations(
2150
{"org.freedesktop.DBus.Property.EmitsChangedSignal":
2151
"invalidates"})
2152
@dbus_service_property(_interface,
2153
signature="ay",
2154
access="write",
2155
byte_arrays=True)
1146
2156
def Secret_dbus_property(self, value):
1147
self.secret = str(value)
1148
2157
self.secret = bytes(value)
2158
1149
2159
del _interface
1150
2160
1151
2161
1154
2164
self._pipe = child_pipe
1155
2165
self._pipe.send(('init', fpr, address))
1156
2166
if not self._pipe.recv():
1157
raise KeyError()
1158
2167
raise KeyError(fpr)
2168
1159
2169
def __getattribute__(self, name):
1160
if(name == '_pipe'):
2170
if name == '_pipe':
1161
2171
return super(ProxyClient, self).__getattribute__(name)
1162
2172
self._pipe.send(('getattr', name))
1163
2173
data = self._pipe.recv()
1164
2174
if data[0] == 'data':
1165
2175
return data[1]
1166
2176
if data[0] == 'function':
2177
1167
2178
def func(*args, **kwargs):
1168
2179
self._pipe.send(('funcall', name, args, kwargs))
1169
2180
return self._pipe.recv()[1]
2181
1170
2182
return func
1171
2183
1172
2184
def __setattr__(self, name, value):
1173
if(name == '_pipe'):
2185
if name == '_pipe':
1174
2186
return super(ProxyClient, self).__setattr__(name, value)
1175
2187
self._pipe.send(('setattr', name, value))
1176
2188
1177
2189
1178
2190
class ClientHandler(socketserver.BaseRequestHandler, object):
1179
2191
"""A class to handle client connections.
1180
2192
1181
2193
Instantiated once for each connection to handle it.
1182
2194
Note: This will run in its own forked process."""
1183
2195
1184
2196
def handle(self):
1185
2197
with contextlib.closing(self.server.child_pipe) as child_pipe:
1186
2198
logger.info("TCP connection from: %s",
1187
unicode(self.client_address))
2199
str(self.client_address))
1188
2200
logger.debug("Pipe FD: %d",
1189
2201
self.server.child_pipe.fileno())
1190
1191
session = (gnutls.connection
1192
.ClientSession(self.request,
1193
gnutls.connection
1194
.X509Credentials()))
1195
1196
# Note: gnutls.connection.X509Credentials is really a
1197
# generic GnuTLS certificate credentials object so long as
1198
# no X.509 keys are added to it. Therefore, we can use it
1199
# here despite using OpenPGP certificates.
1200
1201
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1202
# "+AES-256-CBC", "+SHA1",
1203
# "+COMP-NULL", "+CTYPE-OPENPGP",
1204
# "+DHE-DSS"))
2202
2203
session = gnutls.ClientSession(self.request)
2204
2205
# priority = ':'.join(("NONE", "+VERS-TLS1.1",
2206
# "+AES-256-CBC", "+SHA1",
2207
# "+COMP-NULL", "+CTYPE-OPENPGP",
2208
# "+DHE-DSS"))
1205
2209
# Use a fallback default, since this MUST be set.
1206
2210
priority = self.server.gnutls_priority
1207
2211
if priority is None:
1208
2212
priority = "NORMAL"
1209
(gnutls.library.functions
1210
.gnutls_priority_set_direct(session._c_object,
1211
priority, None))
1212
2213
gnutls.priority_set_direct(session._c_object,
2214
priority.encode("utf-8"),
2215
None)
2216
1213
2217
# Start communication using the Mandos protocol
1214
2218
# Get protocol number
1215
2219
line = self.request.makefile().readline()
1216
2220
logger.debug("Protocol version: %r", line)
1217
2221
try:
1218
2222
if int(line.strip().split()[0]) > 1:
1219
raise RuntimeError
2223
raise RuntimeError(line)
1220
2224
except (ValueError, IndexError, RuntimeError) as error:
1221
2225
logger.error("Unknown protocol version: %s", error)
1222
2226
return
1223
2227
1224
2228
# Start GnuTLS connection
1225
2229
try:
1226
2230
session.handshake()
1227
except gnutls.errors.GNUTLSError as error:
2231
except gnutls.Error as error:
1228
2232
logger.warning("Handshake failed: %s", error)
1229
2233
# Do not run session.bye() here: the session is not
1230
2234
# established. Just abandon the request.
1231
2235
return
1232
2236
logger.debug("Handshake succeeded")
1233
2237
1234
2238
approval_required = False
1235
2239
try:
1236
2240
try:
1237
fpr = self.fingerprint(self.peer_certificate
1238
(session))
1239
except (TypeError,
1240
gnutls.errors.GNUTLSError) as error:
2241
fpr = self.fingerprint(
2242
self.peer_certificate(session))
2243
except (TypeError, gnutls.Error) as error:
1241
2244
logger.warning("Bad certificate: %s", error)
1242
2245
return
1243
2246
logger.debug("Fingerprint: %s", fpr)
1244
2247
1245
2248
try:
1246
2249
client = ProxyClient(child_pipe, fpr,
1247
2250
self.client_address)
1248
2251
except KeyError:
1249
2252
return
1250
2253
1251
2254
if client.approval_delay:
1252
2255
delay = client.approval_delay
1253
2256
client.approvals_pending += 1
1254
2257
approval_required = True
1255
2258
1256
2259
while True:
1257
2260
if not client.enabled:
1258
2261
logger.info("Client %s is disabled",
1259
client.name)
2262
client.name)
1260
2263
if self.server.use_dbus:
1261
2264
# Emit D-Bus signal
1262
client.Rejected("Disabled")
2265
client.Rejected("Disabled")
1263
2266
return
1264
1265
if client._approved or not client.approval_delay:
1266
#We are approved or approval is disabled
2267
2268
if client.approved or not client.approval_delay:
2269
# We are approved or approval is disabled
1267
2270
break
1268
elif client._approved is None:
2271
elif client.approved is None:
1269
2272
logger.info("Client %s needs approval",
1270
2273
client.name)
1271
2274
if self.server.use_dbus:
1272
2275
# Emit D-Bus signal
1273
2276
client.NeedApproval(
1274
client.approval_delay_milliseconds(),
1275
client.approved_by_default)
2277
client.approval_delay.total_seconds()
2278
* 1000, client.approved_by_default)
1276
2279
else:
1277
2280
logger.warning("Client %s was not approved",
1278
2281
client.name)
1280
2283
# Emit D-Bus signal
1281
2284
client.Rejected("Denied")
1282
2285
return
1283
1284
#wait until timeout or approved
1285
#x = float(client._timedelta_to_milliseconds(delay))
2286
2287
# wait until timeout or approved
1286
2288
time = datetime.datetime.now()
1287
2289
client.changedstate.acquire()
1288
client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))
2290
client.changedstate.wait(delay.total_seconds())
1289
2291
client.changedstate.release()
1290
2292
time2 = datetime.datetime.now()
1291
2293
if (time2 - time) >= delay:
1301
2303
break
1302
2304
else:
1303
2305
delay -= time2 - time
1304
1305
sent_size = 0
1306
while sent_size < len(client.secret):
1307
try:
1308
sent = session.send(client.secret[sent_size:])
1309
except gnutls.errors.GNUTLSError as error:
1310
logger.warning("gnutls send failed")
1311
return
1312
logger.debug("Sent: %d, remaining: %d",
1313
sent, len(client.secret)
1314
- (sent_size + sent))
1315
sent_size += sent
1316
2306
2307
try:
2308
session.send(client.secret)
2309
except gnutls.Error as error:
2310
logger.warning("gnutls send failed",
2311
exc_info=error)
2312
return
2313
1317
2314
logger.info("Sending secret to %s", client.name)
1318
# bump the timeout as if seen
1319
client.checked_ok(client.extended_timeout)
2315
# bump the timeout using extended_timeout
2316
client.bump_timeout(client.extended_timeout)
1320
2317
if self.server.use_dbus:
1321
2318
# Emit D-Bus signal
1322
2319
client.GotSecret()
1323
2320
1324
2321
finally:
1325
2322
if approval_required:
1326
2323
client.approvals_pending -= 1
1327
2324
try:
1328
2325
session.bye()
1329
except gnutls.errors.GNUTLSError as error:
1330
logger.warning("GnuTLS bye failed")
1331
2326
except gnutls.Error as error:
2327
logger.warning("GnuTLS bye failed",
2328
exc_info=error)
2329
1332
2330
@staticmethod
1333
2331
def peer_certificate(session):
1334
2332
"Return the peer's OpenPGP certificate as a bytestring"
1335
2333
# If not an OpenPGP certificate...
1336
if (gnutls.library.functions
1337
.gnutls_certificate_type_get(session._c_object)
1338
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1339
# ...do the normal thing
1340
return session.peer_certificate
2334
if (gnutls.certificate_type_get(session._c_object)
2335
!= gnutls.CRT_OPENPGP):
2336
# ...return invalid data
2337
return b""
1341
2338
list_size = ctypes.c_uint(1)
1342
cert_list = (gnutls.library.functions
1343
.gnutls_certificate_get_peers
2339
cert_list = (gnutls.certificate_get_peers
1344
2340
(session._c_object, ctypes.byref(list_size)))
1345
2341
if not bool(cert_list) and list_size.value != 0:
1346
raise gnutls.errors.GNUTLSError("error getting peer"
1347
" certificate")
2342
raise gnutls.Error("error getting peer certificate")
1348
2343
if list_size.value == 0:
1349
2344
return None
1350
2345
cert = cert_list[0]
1351
2346
return ctypes.string_at(cert.data, cert.size)
1352
2347
1353
2348
@staticmethod
1354
2349
def fingerprint(openpgp):
1355
2350
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1356
2351
# New GnuTLS "datum" with the OpenPGP public key
1357
datum = (gnutls.library.types
1358
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1359
ctypes.POINTER
1360
(ctypes.c_ubyte)),
1361
ctypes.c_uint(len(openpgp))))
2352
datum = gnutls.datum_t(
2353
ctypes.cast(ctypes.c_char_p(openpgp),
2354
ctypes.POINTER(ctypes.c_ubyte)),
2355
ctypes.c_uint(len(openpgp)))
1362
2356
# New empty GnuTLS certificate
1363
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1364
(gnutls.library.functions
1365
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
2357
crt = gnutls.openpgp_crt_t()
2358
gnutls.openpgp_crt_init(ctypes.byref(crt))
1366
2359
# Import the OpenPGP public key into the certificate
1367
(gnutls.library.functions
1368
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1369
gnutls.library.constants
1370
.GNUTLS_OPENPGP_FMT_RAW))
2360
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2361
gnutls.OPENPGP_FMT_RAW)
1371
2362
# Verify the self signature in the key
1372
2363
crtverify = ctypes.c_uint()
1373
(gnutls.library.functions
1374
.gnutls_openpgp_crt_verify_self(crt, 0,
1375
ctypes.byref(crtverify)))
2364
gnutls.openpgp_crt_verify_self(crt, 0,
2365
ctypes.byref(crtverify))
1376
2366
if crtverify.value != 0:
1377
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1378
raise (gnutls.errors.CertificateSecurityError
1379
("Verify failed"))
2367
gnutls.openpgp_crt_deinit(crt)
2368
raise gnutls.CertificateSecurityError(code
2369
=crtverify.value)
1380
2370
# New buffer for the fingerprint
1381
2371
buf = ctypes.create_string_buffer(20)
1382
2372
buf_len = ctypes.c_size_t()
1383
2373
# Get the fingerprint from the certificate into the buffer
1384
(gnutls.library.functions
1385
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1386
ctypes.byref(buf_len)))
2374
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2375
ctypes.byref(buf_len))
1387
2376
# Deinit the certificate
1388
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2377
gnutls.openpgp_crt_deinit(crt)
1389
2378
# Convert the buffer to a Python bytestring
1390
2379
fpr = ctypes.string_at(buf, buf_len.value)
1391
2380
# Convert the bytestring to hexadecimal notation
1392
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
2381
hex_fpr = binascii.hexlify(fpr).upper()
1393
2382
return hex_fpr
1394
2383
1395
2384
1396
2385
class MultiprocessingMixIn(object):
1397
2386
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2387
1398
2388
def sub_process_main(self, request, address):
1399
2389
try:
1400
2390
self.finish_request(request, address)
1401
except:
2391
except Exception:
1402
2392
self.handle_error(request, address)
1403
2393
self.close_request(request)
1404
2394
1405
2395
def process_request(self, request, address):
1406
2396
"""Start a new process to process the request."""
1407
multiprocessing.Process(target = self.sub_process_main,
1408
args = (request, address)).start()
2397
proc = multiprocessing.Process(target=self.sub_process_main,
2398
args=(request, address))
2399
proc.start()
2400
return proc
1409
2401
1410
2402
1411
2403
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1412
2404
""" adds a pipe to the MixIn """
2405
1413
2406
def process_request(self, request, client_address):
1414
2407
"""Overrides and wraps the original process_request().
1415
2408
1416
2409
This function creates a new pipe in self.pipe
1417
2410
"""
1418
2411
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1419
1420
super(MultiprocessingMixInWithPipe,
1421
self).process_request(request, client_address)
2412
2413
proc = MultiprocessingMixIn.process_request(self, request,
2414
client_address)
1422
2415
self.child_pipe.close()
1423
self.add_pipe(parent_pipe)
1424
1425
def add_pipe(self, parent_pipe):
2416
self.add_pipe(parent_pipe, proc)
2417
2418
def add_pipe(self, parent_pipe, proc):
1426
2419
"""Dummy function; override as necessary"""
1427
raise NotImplementedError
2420
raise NotImplementedError()
1428
2421
1429
2422
1430
2423
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1431
2424
socketserver.TCPServer, object):
1432
2425
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1433
2426
1434
2427
Attributes:
1435
2428
enabled: Boolean; whether this server is activated yet
1436
2429
interface: None or a network interface name (string)
1437
2430
use_ipv6: Boolean; to use IPv6 or not
1438
2431
"""
2432
1439
2433
def __init__(self, server_address, RequestHandlerClass,
1440
interface=None, use_ipv6=True):
2434
interface=None,
2435
use_ipv6=True,
2436
socketfd=None):
2437
"""If socketfd is set, use that file descriptor instead of
2438
creating a new one with socket.socket().
2439
"""
1441
2440
self.interface = interface
1442
2441
if use_ipv6:
1443
2442
self.address_family = socket.AF_INET6
2443
if socketfd is not None:
2444
# Save the file descriptor
2445
self.socketfd = socketfd
2446
# Save the original socket.socket() function
2447
self.socket_socket = socket.socket
2448
2449
# To implement --socket, we monkey patch socket.socket.
2450
#
2451
# (When socketserver.TCPServer is a new-style class, we
2452
# could make self.socket into a property instead of monkey
2453
# patching socket.socket.)
2454
#
2455
# Create a one-time-only replacement for socket.socket()
2456
@functools.wraps(socket.socket)
2457
def socket_wrapper(*args, **kwargs):
2458
# Restore original function so subsequent calls are
2459
# not affected.
2460
socket.socket = self.socket_socket
2461
del self.socket_socket
2462
# This time only, return a new socket object from the
2463
# saved file descriptor.
2464
return socket.fromfd(self.socketfd, *args, **kwargs)
2465
# Replace socket.socket() function with wrapper
2466
socket.socket = socket_wrapper
2467
# The socketserver.TCPServer.__init__ will call
2468
# socket.socket(), which might be our replacement,
2469
# socket_wrapper(), if socketfd was set.
1444
2470
socketserver.TCPServer.__init__(self, server_address,
1445
2471
RequestHandlerClass)
2472
1446
2473
def server_bind(self):
1447
2474
"""This overrides the normal server_bind() function
1448
2475
to bind to an interface if one was specified, and also NOT to
1449
2476
bind to an address or port if they were not specified."""
2477
global SO_BINDTODEVICE
1450
2478
if self.interface is not None:
1451
2479
if SO_BINDTODEVICE is None:
1452
logger.error("SO_BINDTODEVICE does not exist;"
1453
" cannot bind to interface %s",
1454
self.interface)
1455
else:
1456
try:
1457
self.socket.setsockopt(socket.SOL_SOCKET,
1458
SO_BINDTODEVICE,
1459
str(self.interface
1460
+ '\0'))
1461
except socket.error as error:
1462
if error[0] == errno.EPERM:
1463
logger.error("No permission to"
1464
" bind to interface %s",
1465
self.interface)
1466
elif error[0] == errno.ENOPROTOOPT:
1467
logger.error("SO_BINDTODEVICE not available;"
1468
" cannot bind to interface %s",
1469
self.interface)
1470
else:
1471
raise
2480
# Fall back to a hard-coded value which seems to be
2481
# common enough.
2482
logger.warning("SO_BINDTODEVICE not found, trying 25")
2483
SO_BINDTODEVICE = 25
2484
try:
2485
self.socket.setsockopt(
2486
socket.SOL_SOCKET, SO_BINDTODEVICE,
2487
(self.interface + "\0").encode("utf-8"))
2488
except socket.error as error:
2489
if error.errno == errno.EPERM:
2490
logger.error("No permission to bind to"
2491
" interface %s", self.interface)
2492
elif error.errno == errno.ENOPROTOOPT:
2493
logger.error("SO_BINDTODEVICE not available;"
2494
" cannot bind to interface %s",
2495
self.interface)
2496
elif error.errno == errno.ENODEV:
2497
logger.error("Interface %s does not exist,"
2498
" cannot bind", self.interface)
2499
else:
2500
raise
1472
2501
# Only bind(2) the socket if we really need to.
1473
2502
if self.server_address[0] or self.server_address[1]:
1474
2503
if not self.server_address[0]:
1475
2504
if self.address_family == socket.AF_INET6:
1476
any_address = "::" # in6addr_any
2505
any_address = "::" # in6addr_any
1477
2506
else:
1478
any_address = socket.INADDR_ANY
2507
any_address = "0.0.0.0" # INADDR_ANY
1479
2508
self.server_address = (any_address,
1480
2509
self.server_address[1])
1481
2510
elif not self.server_address[1]:
1482
self.server_address = (self.server_address[0],
1483
0)
2511
self.server_address = (self.server_address[0], 0)
1484
2512
# if self.interface:
1485
2513
# self.server_address = (self.server_address[0],
1486
2514
# 0, # port
1492
2520
1493
2521
class MandosServer(IPv6_TCPServer):
1494
2522
"""Mandos server.
1495
2523
1496
2524
Attributes:
1497
2525
clients: set of Client objects
1498
2526
gnutls_priority GnuTLS priority string
1499
2527
use_dbus: Boolean; to emit D-Bus signals or not
1500
1501
Assumes a gobject.MainLoop event loop.
2528
2529
Assumes a GLib.MainLoop event loop.
1502
2530
"""
2531
1503
2532
def __init__(self, server_address, RequestHandlerClass,
1504
interface=None, use_ipv6=True, clients=None,
1505
gnutls_priority=None, use_dbus=True):
2533
interface=None,
2534
use_ipv6=True,
2535
clients=None,
2536
gnutls_priority=None,
2537
use_dbus=True,
2538
socketfd=None):
1506
2539
self.enabled = False
1507
2540
self.clients = clients
1508
2541
if self.clients is None:
1509
self.clients = set()
2542
self.clients = {}
1510
2543
self.use_dbus = use_dbus
1511
2544
self.gnutls_priority = gnutls_priority
1512
2545
IPv6_TCPServer.__init__(self, server_address,
1513
2546
RequestHandlerClass,
1514
interface = interface,
1515
use_ipv6 = use_ipv6)
2547
interface=interface,
2548
use_ipv6=use_ipv6,
2549
socketfd=socketfd)
2550
1516
2551
def server_activate(self):
1517
2552
if self.enabled:
1518
2553
return socketserver.TCPServer.server_activate(self)
2554
1519
2555
def enable(self):
1520
2556
self.enabled = True
1521
def add_pipe(self, parent_pipe):
2557
2558
def add_pipe(self, parent_pipe, proc):
1522
2559
# Call "handle_ipc" for both data and EOF events
1523
gobject.io_add_watch(parent_pipe.fileno(),
1524
gobject.IO_IN | gobject.IO_HUP,
1525
functools.partial(self.handle_ipc,
1526
parent_pipe = parent_pipe))
1527
1528
def handle_ipc(self, source, condition, parent_pipe=None,
2560
GLib.io_add_watch(
2561
parent_pipe.fileno(),
2562
GLib.IO_IN | GLib.IO_HUP,
2563
functools.partial(self.handle_ipc,
2564
parent_pipe=parent_pipe,
2565
proc=proc))
2566
2567
def handle_ipc(self, source, condition,
2568
parent_pipe=None,
2569
proc=None,
1529
2570
client_object=None):
1530
condition_names = {
1531
gobject.IO_IN: "IN", # There is data to read.
1532
gobject.IO_OUT: "OUT", # Data can be written (without
1533
# blocking).
1534
gobject.IO_PRI: "PRI", # There is urgent data to read.
1535
gobject.IO_ERR: "ERR", # Error condition.
1536
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1537
# broken, usually for pipes and
1538
# sockets).
1539
}
1540
conditions_string = ' | '.join(name
1541
for cond, name in
1542
condition_names.iteritems()
1543
if cond & condition)
1544
# error or the other end of multiprocessing.Pipe has closed
1545
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
2571
# error, or the other end of multiprocessing.Pipe has closed
2572
if condition & (GLib.IO_ERR | GLib.IO_HUP):
2573
# Wait for other process to exit
2574
proc.join()
1546
2575
return False
1547
2576
1548
2577
# Read a request from the child
1549
2578
request = parent_pipe.recv()
1550
2579
command = request[0]
1551
2580
1552
2581
if command == 'init':
1553
fpr = request[1]
2582
fpr = request[1].decode("ascii")
1554
2583
address = request[2]
1555
1556
for c in self.clients:
2584
2585
for c in self.clients.values():
1557
2586
if c.fingerprint == fpr:
1558
2587
client = c
1559
2588
break
1562
2591
"dress: %s", fpr, address)
1563
2592
if self.use_dbus:
1564
2593
# Emit D-Bus signal
1565
mandos_dbus_service.ClientNotFound(fpr, address[0])
2594
mandos_dbus_service.ClientNotFound(fpr,
2595
address[0])
1566
2596
parent_pipe.send(False)
1567
2597
return False
1568
1569
gobject.io_add_watch(parent_pipe.fileno(),
1570
gobject.IO_IN | gobject.IO_HUP,
1571
functools.partial(self.handle_ipc,
1572
parent_pipe = parent_pipe,
1573
client_object = client))
2598
2599
GLib.io_add_watch(
2600
parent_pipe.fileno(),
2601
GLib.IO_IN | GLib.IO_HUP,
2602
functools.partial(self.handle_ipc,
2603
parent_pipe=parent_pipe,
2604
proc=proc,
2605
client_object=client))
1574
2606
parent_pipe.send(True)
1575
# remove the old hook in favor of the new above hook on same fileno
2607
# remove the old hook in favor of the new above hook on
2608
# same fileno
1576
2609
return False
1577
2610
if command == 'funcall':
1578
2611
funcname = request[1]
1579
2612
args = request[2]
1580
2613
kwargs = request[3]
1581
1582
parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))
1583
2614
2615
parent_pipe.send(('data', getattr(client_object,
2616
funcname)(*args,
2617
**kwargs)))
2618
1584
2619
if command == 'getattr':
1585
2620
attrname = request[1]
1586
if callable(client_object.__getattribute__(attrname)):
1587
parent_pipe.send(('function',))
2621
if isinstance(client_object.__getattribute__(attrname),
2622
collections.Callable):
2623
parent_pipe.send(('function', ))
1588
2624
else:
1589
parent_pipe.send(('data', client_object.__getattribute__(attrname)))
1590
2625
parent_pipe.send((
2626
'data', client_object.__getattribute__(attrname)))
2627
1591
2628
if command == 'setattr':
1592
2629
attrname = request[1]
1593
2630
value = request[2]
1594
2631
setattr(client_object, attrname, value)
1595
2632
1596
2633
return True
1597
2634
1598
2635
2636
def rfc3339_duration_to_delta(duration):
2637
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2638
2639
>>> rfc3339_duration_to_delta("P7D")
2640
datetime.timedelta(7)
2641
>>> rfc3339_duration_to_delta("PT60S")
2642
datetime.timedelta(0, 60)
2643
>>> rfc3339_duration_to_delta("PT60M")
2644
datetime.timedelta(0, 3600)
2645
>>> rfc3339_duration_to_delta("PT24H")
2646
datetime.timedelta(1)
2647
>>> rfc3339_duration_to_delta("P1W")
2648
datetime.timedelta(7)
2649
>>> rfc3339_duration_to_delta("PT5M30S")
2650
datetime.timedelta(0, 330)
2651
>>> rfc3339_duration_to_delta("P1DT3M20S")
2652
datetime.timedelta(1, 200)
2653
"""
2654
2655
# Parsing an RFC 3339 duration with regular expressions is not
2656
# possible - there would have to be multiple places for the same
2657
# values, like seconds. The current code, while more esoteric, is
2658
# cleaner without depending on a parsing library. If Python had a
2659
# built-in library for parsing we would use it, but we'd like to
2660
# avoid excessive use of external libraries.
2661
2662
# New type for defining tokens, syntax, and semantics all-in-one
2663
Token = collections.namedtuple("Token", (
2664
"regexp", # To match token; if "value" is not None, must have
2665
# a "group" containing digits
2666
"value", # datetime.timedelta or None
2667
"followers")) # Tokens valid after this token
2668
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2669
# the "duration" ABNF definition in RFC 3339, Appendix A.
2670
token_end = Token(re.compile(r"$"), None, frozenset())
2671
token_second = Token(re.compile(r"(\d+)S"),
2672
datetime.timedelta(seconds=1),
2673
frozenset((token_end, )))
2674
token_minute = Token(re.compile(r"(\d+)M"),
2675
datetime.timedelta(minutes=1),
2676
frozenset((token_second, token_end)))
2677
token_hour = Token(re.compile(r"(\d+)H"),
2678
datetime.timedelta(hours=1),
2679
frozenset((token_minute, token_end)))
2680
token_time = Token(re.compile(r"T"),
2681
None,
2682
frozenset((token_hour, token_minute,
2683
token_second)))
2684
token_day = Token(re.compile(r"(\d+)D"),
2685
datetime.timedelta(days=1),
2686
frozenset((token_time, token_end)))
2687
token_month = Token(re.compile(r"(\d+)M"),
2688
datetime.timedelta(weeks=4),
2689
frozenset((token_day, token_end)))
2690
token_year = Token(re.compile(r"(\d+)Y"),
2691
datetime.timedelta(weeks=52),
2692
frozenset((token_month, token_end)))
2693
token_week = Token(re.compile(r"(\d+)W"),
2694
datetime.timedelta(weeks=1),
2695
frozenset((token_end, )))
2696
token_duration = Token(re.compile(r"P"), None,
2697
frozenset((token_year, token_month,
2698
token_day, token_time,
2699
token_week)))
2700
# Define starting values:
2701
# Value so far
2702
value = datetime.timedelta()
2703
found_token = None
2704
# Following valid tokens
2705
followers = frozenset((token_duration, ))
2706
# String left to parse
2707
s = duration
2708
# Loop until end token is found
2709
while found_token is not token_end:
2710
# Search for any currently valid tokens
2711
for token in followers:
2712
match = token.regexp.match(s)
2713
if match is not None:
2714
# Token found
2715
if token.value is not None:
2716
# Value found, parse digits
2717
factor = int(match.group(1), 10)
2718
# Add to value so far
2719
value += factor * token.value
2720
# Strip token from string
2721
s = token.regexp.sub("", s, 1)
2722
# Go to found token
2723
found_token = token
2724
# Set valid next tokens
2725
followers = found_token.followers
2726
break
2727
else:
2728
# No currently valid tokens were found
2729
raise ValueError("Invalid RFC 3339 duration: {!r}"
2730
.format(duration))
2731
# End token found
2732
return value
2733
2734
1599
2735
def string_to_delta(interval):
1600
2736
"""Parse a string and return a datetime.timedelta
1601
2737
1602
2738
>>> string_to_delta('7d')
1603
2739
datetime.timedelta(7)
1604
2740
>>> string_to_delta('60s')
1612
2748
>>> string_to_delta('5m 30s')
1613
2749
datetime.timedelta(0, 330)
1614
2750
"""
2751
2752
try:
2753
return rfc3339_duration_to_delta(interval)
2754
except ValueError:
2755
pass
2756
1615
2757
timevalue = datetime.timedelta(0)
1616
2758
for s in interval.split():
1617
2759
try:
1618
suffix = unicode(s[-1])
2760
suffix = s[-1]
1619
2761
value = int(s[:-1])
1620
2762
if suffix == "d":
1621
2763
delta = datetime.timedelta(value)
1628
2770
elif suffix == "w":
1629
2771
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1630
2772
else:
1631
raise ValueError("Unknown suffix %r" % suffix)
1632
except (ValueError, IndexError) as e:
2773
raise ValueError("Unknown suffix {!r}".format(suffix))
2774
except IndexError as e:
1633
2775
raise ValueError(*(e.args))
1634
2776
timevalue += delta
1635
2777
return timevalue
1636
2778
1637
2779
1638
def if_nametoindex(interface):
1639
"""Call the C function if_nametoindex(), or equivalent
1640
1641
Note: This function cannot accept a unicode string."""
1642
global if_nametoindex
1643
try:
1644
if_nametoindex = (ctypes.cdll.LoadLibrary
1645
(ctypes.util.find_library("c"))
1646
.if_nametoindex)
1647
except (OSError, AttributeError):
1648
logger.warning("Doing if_nametoindex the hard way")
1649
def if_nametoindex(interface):
1650
"Get an interface index the hard way, i.e. using fcntl()"
1651
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1652
with contextlib.closing(socket.socket()) as s:
1653
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1654
struct.pack(str("16s16x"),
1655
interface))
1656
interface_index = struct.unpack(str("I"),
1657
ifreq[16:20])[0]
1658
return interface_index
1659
return if_nametoindex(interface)
1660
1661
1662
def daemon(nochdir = False, noclose = False):
2780
def daemon(nochdir=False, noclose=False):
1663
2781
"""See daemon(3). Standard BSD Unix function.
1664
2782
1665
2783
This should really exist as os.daemon, but it doesn't (yet)."""
1666
2784
if os.fork():
1667
2785
sys.exit()
1672
2790
sys.exit()
1673
2791
if not noclose:
1674
2792
# Close all standard open file descriptors
1675
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2793
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1676
2794
if not stat.S_ISCHR(os.fstat(null).st_mode):
1677
2795
raise OSError(errno.ENODEV,
1678
"%s not a character device"
1679
% os.path.devnull)
2796
"{} not a character device"
2797
.format(os.devnull))
1680
2798
os.dup2(null, sys.stdin.fileno())
1681
2799
os.dup2(null, sys.stdout.fileno())
1682
2800
os.dup2(null, sys.stderr.fileno())
1685
2803
1686
2804
1687
2805
def main():
1688
2806
1689
2807
##################################################################
1690
2808
# Parsing of options, both command line and config file
1691
2809
1692
2810
parser = argparse.ArgumentParser()
1693
2811
parser.add_argument("-v", "--version", action="version",
1694
version = "%%(prog)s %s" % version,
2812
version="%(prog)s {}".format(version),
1695
2813
help="show version number and exit")
1696
2814
parser.add_argument("-i", "--interface", metavar="IF",
1697
2815
help="Bind to interface IF")
1703
2821
help="Run self-test")
1704
2822
parser.add_argument("--debug", action="store_true",
1705
2823
help="Debug mode; run in foreground and log"
1706
" to terminal")
2824
" to terminal", default=None)
1707
2825
parser.add_argument("--debuglevel", metavar="LEVEL",
1708
2826
help="Debug level for stdout output")
1709
2827
parser.add_argument("--priority", help="GnuTLS"
1716
2834
" files")
1717
2835
parser.add_argument("--no-dbus", action="store_false",
1718
2836
dest="use_dbus", help="Do not provide D-Bus"
1719
" system bus interface")
2837
" system bus interface", default=None)
1720
2838
parser.add_argument("--no-ipv6", action="store_false",
1721
dest="use_ipv6", help="Do not use IPv6")
2839
dest="use_ipv6", help="Do not use IPv6",
2840
default=None)
2841
parser.add_argument("--no-restore", action="store_false",
2842
dest="restore", help="Do not restore stored"
2843
" state", default=None)
2844
parser.add_argument("--socket", type=int,
2845
help="Specify a file descriptor to a network"
2846
" socket to use instead of creating one")
2847
parser.add_argument("--statedir", metavar="DIR",
2848
help="Directory to save/restore state in")
2849
parser.add_argument("--foreground", action="store_true",
2850
help="Run in foreground", default=None)
2851
parser.add_argument("--no-zeroconf", action="store_false",
2852
dest="zeroconf", help="Do not use Zeroconf",
2853
default=None)
2854
1722
2855
options = parser.parse_args()
1723
2856
1724
2857
if options.check:
1725
2858
import doctest
1726
doctest.testmod()
1727
sys.exit()
1728
2859
fail_count, test_count = doctest.testmod()
2860
sys.exit(os.EX_OK if fail_count == 0 else 1)
2861
1729
2862
# Default values for config file for server-global settings
1730
server_defaults = { "interface": "",
1731
"address": "",
1732
"port": "",
1733
"debug": "False",
1734
"priority":
1735
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1736
"servicename": "Mandos",
1737
"use_dbus": "True",
1738
"use_ipv6": "True",
1739
"debuglevel": "",
1740
}
1741
2863
server_defaults = {"interface": "",
2864
"address": "",
2865
"port": "",
2866
"debug": "False",
2867
"priority":
2868
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2869
":+SIGN-DSA-SHA256",
2870
"servicename": "Mandos",
2871
"use_dbus": "True",
2872
"use_ipv6": "True",
2873
"debuglevel": "",
2874
"restore": "True",
2875
"socket": "",
2876
"statedir": "/var/lib/mandos",
2877
"foreground": "False",
2878
"zeroconf": "True",
2879
}
2880
1742
2881
# Parse config file for server-global settings
1743
2882
server_config = configparser.SafeConfigParser(server_defaults)
1744
2883
del server_defaults
1745
server_config.read(os.path.join(options.configdir,
1746
"mandos.conf"))
2884
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1747
2885
# Convert the SafeConfigParser object to a dict
1748
2886
server_settings = server_config.defaults()
1749
2887
# Use the appropriate methods on the non-string config options
1750
for option in ("debug", "use_dbus", "use_ipv6"):
2888
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2889
"foreground", "zeroconf"):
1751
2890
server_settings[option] = server_config.getboolean("DEFAULT",
1752
2891
option)
1753
2892
if server_settings["port"]:
1754
2893
server_settings["port"] = server_config.getint("DEFAULT",
1755
2894
"port")
2895
if server_settings["socket"]:
2896
server_settings["socket"] = server_config.getint("DEFAULT",
2897
"socket")
2898
# Later, stdin will, and stdout and stderr might, be dup'ed
2899
# over with an opened os.devnull. But we don't want this to
2900
# happen with a supplied network socket.
2901
if 0 <= server_settings["socket"] <= 2:
2902
server_settings["socket"] = os.dup(server_settings
2903
["socket"])
1756
2904
del server_config
1757
2905
1758
2906
# Override the settings from the config file with command line
1759
2907
# options, if set.
1760
2908
for option in ("interface", "address", "port", "debug",
1761
"priority", "servicename", "configdir",
1762
"use_dbus", "use_ipv6", "debuglevel"):
2909
"priority", "servicename", "configdir", "use_dbus",
2910
"use_ipv6", "debuglevel", "restore", "statedir",
2911
"socket", "foreground", "zeroconf"):
1763
2912
value = getattr(options, option)
1764
2913
if value is not None:
1765
2914
server_settings[option] = value
1766
2915
del options
1767
2916
# Force all strings to be unicode
1768
2917
for option in server_settings.keys():
1769
if type(server_settings[option]) is str:
1770
server_settings[option] = unicode(server_settings[option])
2918
if isinstance(server_settings[option], bytes):
2919
server_settings[option] = (server_settings[option]
2920
.decode("utf-8"))
2921
# Force all boolean options to be boolean
2922
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2923
"foreground", "zeroconf"):
2924
server_settings[option] = bool(server_settings[option])
2925
# Debug implies foreground
2926
if server_settings["debug"]:
2927
server_settings["foreground"] = True
1771
2928
# Now we have our good server settings in "server_settings"
1772
2929
1773
2930
##################################################################
1774
2931
2932
if (not server_settings["zeroconf"]
2933
and not (server_settings["port"]
2934
or server_settings["socket"] != "")):
2935
parser.error("Needs port or socket to work without Zeroconf")
2936
1775
2937
# For convenience
1776
2938
debug = server_settings["debug"]
1777
2939
debuglevel = server_settings["debuglevel"]
1778
2940
use_dbus = server_settings["use_dbus"]
1779
2941
use_ipv6 = server_settings["use_ipv6"]
1780
2942
stored_state_path = os.path.join(server_settings["statedir"],
2943
stored_state_file)
2944
foreground = server_settings["foreground"]
2945
zeroconf = server_settings["zeroconf"]
2946
2947
if debug:
2948
initlogger(debug, logging.DEBUG)
2949
else:
2950
if not debuglevel:
2951
initlogger(debug)
2952
else:
2953
level = getattr(logging, debuglevel.upper())
2954
initlogger(debug, level)
2955
1781
2956
if server_settings["servicename"] != "Mandos":
1782
syslogger.setFormatter(logging.Formatter
1783
('Mandos (%s) [%%(process)d]:'
1784
' %%(levelname)s: %%(message)s'
1785
% server_settings["servicename"]))
1786
2957
syslogger.setFormatter(
2958
logging.Formatter('Mandos ({}) [%(process)d]:'
2959
' %(levelname)s: %(message)s'.format(
2960
server_settings["servicename"])))
2961
1787
2962
# Parse config file with clients
1788
client_defaults = { "timeout": "5m",
1789
"extended_timeout": "15m",
1790
"interval": "2m",
1791
"checker": "fping -q -- %%(host)s",
1792
"host": "",
1793
"approval_delay": "0s",
1794
"approval_duration": "1s",
1795
}
1796
client_config = configparser.SafeConfigParser(client_defaults)
2963
client_config = configparser.SafeConfigParser(Client
2964
.client_defaults)
1797
2965
client_config.read(os.path.join(server_settings["configdir"],
1798
2966
"clients.conf"))
1799
2967
1800
2968
global mandos_dbus_service
1801
2969
mandos_dbus_service = None
1802
1803
tcp_server = MandosServer((server_settings["address"],
1804
server_settings["port"]),
1805
ClientHandler,
1806
interface=(server_settings["interface"]
1807
or None),
1808
use_ipv6=use_ipv6,
1809
gnutls_priority=
1810
server_settings["priority"],
1811
use_dbus=use_dbus)
1812
if not debug:
1813
pidfilename = "/var/run/mandos.pid"
1814
try:
1815
pidfile = open(pidfilename, "w")
1816
except IOError:
1817
logger.error("Could not open file %r", pidfilename)
1818
1819
try:
1820
uid = pwd.getpwnam("_mandos").pw_uid
1821
gid = pwd.getpwnam("_mandos").pw_gid
1822
except KeyError:
1823
try:
1824
uid = pwd.getpwnam("mandos").pw_uid
1825
gid = pwd.getpwnam("mandos").pw_gid
2970
2971
socketfd = None
2972
if server_settings["socket"] != "":
2973
socketfd = server_settings["socket"]
2974
tcp_server = MandosServer(
2975
(server_settings["address"], server_settings["port"]),
2976
ClientHandler,
2977
interface=(server_settings["interface"] or None),
2978
use_ipv6=use_ipv6,
2979
gnutls_priority=server_settings["priority"],
2980
use_dbus=use_dbus,
2981
socketfd=socketfd)
2982
if not foreground:
2983
pidfilename = "/run/mandos.pid"
2984
if not os.path.isdir("/run/."):
2985
pidfilename = "/var/run/mandos.pid"
2986
pidfile = None
2987
try:
2988
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
2989
except IOError as e:
2990
logger.error("Could not open file %r", pidfilename,
2991
exc_info=e)
2992
2993
for name, group in (("_mandos", "_mandos"),
2994
("mandos", "mandos"),
2995
("nobody", "nogroup")):
2996
try:
2997
uid = pwd.getpwnam(name).pw_uid
2998
gid = pwd.getpwnam(group).pw_gid
2999
break
1826
3000
except KeyError:
1827
try:
1828
uid = pwd.getpwnam("nobody").pw_uid
1829
gid = pwd.getpwnam("nobody").pw_gid
1830
except KeyError:
1831
uid = 65534
1832
gid = 65534
3001
continue
3002
else:
3003
uid = 65534
3004
gid = 65534
1833
3005
try:
1834
3006
os.setgid(gid)
1835
3007
os.setuid(uid)
3008
if debug:
3009
logger.debug("Did setuid/setgid to {}:{}".format(uid,
3010
gid))
1836
3011
except OSError as error:
1837
if error[0] != errno.EPERM:
1838
raise error
1839
1840
if not debug and not debuglevel:
1841
syslogger.setLevel(logging.WARNING)
1842
console.setLevel(logging.WARNING)
1843
if debuglevel:
1844
level = getattr(logging, debuglevel.upper())
1845
syslogger.setLevel(level)
1846
console.setLevel(level)
1847
3012
logger.warning("Failed to setuid/setgid to {}:{}: {}"
3013
.format(uid, gid, os.strerror(error.errno)))
3014
if error.errno != errno.EPERM:
3015
raise
3016
1848
3017
if debug:
1849
3018
# Enable all possible GnuTLS debugging
1850
3019
1851
3020
# "Use a log level over 10 to enable all debugging options."
1852
3021
# - GnuTLS manual
1853
gnutls.library.functions.gnutls_global_set_log_level(11)
1854
1855
@gnutls.library.types.gnutls_log_func
3022
gnutls.global_set_log_level(11)
3023
3024
@gnutls.log_func
1856
3025
def debug_gnutls(level, string):
1857
3026
logger.debug("GnuTLS: %s", string[:-1])
1858
1859
(gnutls.library.functions
1860
.gnutls_global_set_log_function(debug_gnutls))
1861
3027
3028
gnutls.global_set_log_function(debug_gnutls)
3029
1862
3030
# Redirect stdin so all checkers get /dev/null
1863
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
3031
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1864
3032
os.dup2(null, sys.stdin.fileno())
1865
3033
if null > 2:
1866
3034
os.close(null)
1867
else:
1868
# No console logging
1869
logger.removeHandler(console)
1870
3035
1871
3036
# Need to fork before connecting to D-Bus
1872
if not debug:
3037
if not foreground:
1873
3038
# Close all input and output, do double fork, etc.
1874
3039
daemon()
1875
3040
3041
# multiprocessing will use threads, so before we use GLib we need
3042
# to inform GLib that threads will be used.
3043
GLib.threads_init()
3044
1876
3045
global main_loop
1877
3046
# From the Avahi example code
1878
DBusGMainLoop(set_as_default=True )
1879
main_loop = gobject.MainLoop()
3047
DBusGMainLoop(set_as_default=True)
3048
main_loop = GLib.MainLoop()
1880
3049
bus = dbus.SystemBus()
1881
3050
# End of Avahi example code
1882
3051
if use_dbus:
1883
3052
try:
1884
bus_name = dbus.service.BusName("se.bsnet.fukt.Mandos",
1885
bus, do_not_queue=True)
1886
except dbus.exceptions.NameExistsException as e:
1887
logger.error(unicode(e) + ", disabling D-Bus")
3053
bus_name = dbus.service.BusName("se.recompile.Mandos",
3054
bus,
3055
do_not_queue=True)
3056
old_bus_name = dbus.service.BusName(
3057
"se.bsnet.fukt.Mandos", bus,
3058
do_not_queue=True)
3059
except dbus.exceptions.DBusException as e:
3060
logger.error("Disabling D-Bus:", exc_info=e)
1888
3061
use_dbus = False
1889
3062
server_settings["use_dbus"] = False
1890
3063
tcp_server.use_dbus = False
1891
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1892
service = AvahiService(name = server_settings["servicename"],
1893
servicetype = "_mandos._tcp",
1894
protocol = protocol, bus = bus)
1895
if server_settings["interface"]:
1896
service.interface = (if_nametoindex
1897
(str(server_settings["interface"])))
1898
3064
if zeroconf:
3065
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3066
service = AvahiServiceToSyslog(
3067
name=server_settings["servicename"],
3068
servicetype="_mandos._tcp",
3069
protocol=protocol,
3070
bus=bus)
3071
if server_settings["interface"]:
3072
service.interface = if_nametoindex(
3073
server_settings["interface"].encode("utf-8"))
3074
1899
3075
global multiprocessing_manager
1900
3076
multiprocessing_manager = multiprocessing.Manager()
1901
3077
1902
3078
client_class = Client
1903
3079
if use_dbus:
1904
client_class = functools.partial(ClientDBus, bus = bus)
1905
def client_config_items(config, section):
1906
special_settings = {
1907
"approved_by_default":
1908
lambda: config.getboolean(section,
1909
"approved_by_default"),
1910
}
1911
for name, value in config.items(section):
3080
client_class = functools.partial(ClientDBus, bus=bus)
3081
3082
client_settings = Client.config_parser(client_config)
3083
old_client_settings = {}
3084
clients_data = {}
3085
3086
# This is used to redirect stdout and stderr for checker processes
3087
global wnull
3088
wnull = open(os.devnull, "w") # A writable /dev/null
3089
# Only used if server is running in foreground but not in debug
3090
# mode
3091
if debug or not foreground:
3092
wnull.close()
3093
3094
# Get client data and settings from last running state.
3095
if server_settings["restore"]:
3096
try:
3097
with open(stored_state_path, "rb") as stored_state:
3098
if sys.version_info.major == 2:
3099
clients_data, old_client_settings = pickle.load(
3100
stored_state)
3101
else:
3102
bytes_clients_data, bytes_old_client_settings = (
3103
pickle.load(stored_state, encoding="bytes"))
3104
# Fix bytes to strings
3105
# clients_data
3106
# .keys()
3107
clients_data = {(key.decode("utf-8")
3108
if isinstance(key, bytes)
3109
else key): value
3110
for key, value in
3111
bytes_clients_data.items()}
3112
del bytes_clients_data
3113
for key in clients_data:
3114
value = {(k.decode("utf-8")
3115
if isinstance(k, bytes) else k): v
3116
for k, v in
3117
clients_data[key].items()}
3118
clients_data[key] = value
3119
# .client_structure
3120
value["client_structure"] = [
3121
(s.decode("utf-8")
3122
if isinstance(s, bytes)
3123
else s) for s in
3124
value["client_structure"]]
3125
# .name & .host
3126
for k in ("name", "host"):
3127
if isinstance(value[k], bytes):
3128
value[k] = value[k].decode("utf-8")
3129
# old_client_settings
3130
# .keys()
3131
old_client_settings = {
3132
(key.decode("utf-8")
3133
if isinstance(key, bytes)
3134
else key): value
3135
for key, value in
3136
bytes_old_client_settings.items()}
3137
del bytes_old_client_settings
3138
# .host
3139
for value in old_client_settings.values():
3140
if isinstance(value["host"], bytes):
3141
value["host"] = (value["host"]
3142
.decode("utf-8"))
3143
os.remove(stored_state_path)
3144
except IOError as e:
3145
if e.errno == errno.ENOENT:
3146
logger.warning("Could not load persistent state:"
3147
" {}".format(os.strerror(e.errno)))
3148
else:
3149
logger.critical("Could not load persistent state:",
3150
exc_info=e)
3151
raise
3152
except EOFError as e:
3153
logger.warning("Could not load persistent state: "
3154
"EOFError:",
3155
exc_info=e)
3156
3157
with PGPEngine() as pgp:
3158
for client_name, client in clients_data.items():
3159
# Skip removed clients
3160
if client_name not in client_settings:
3161
continue
3162
3163
# Decide which value to use after restoring saved state.
3164
# We have three different values: Old config file,
3165
# new config file, and saved state.
3166
# New config value takes precedence if it differs from old
3167
# config value, otherwise use saved state.
3168
for name, value in client_settings[client_name].items():
3169
try:
3170
# For each value in new config, check if it
3171
# differs from the old config value (Except for
3172
# the "secret" attribute)
3173
if (name != "secret"
3174
and (value !=
3175
old_client_settings[client_name][name])):
3176
client[name] = value
3177
except KeyError:
3178
pass
3179
3180
# Clients who has passed its expire date can still be
3181
# enabled if its last checker was successful. A Client
3182
# whose checker succeeded before we stored its state is
3183
# assumed to have successfully run all checkers during
3184
# downtime.
3185
if client["enabled"]:
3186
if datetime.datetime.utcnow() >= client["expires"]:
3187
if not client["last_checked_ok"]:
3188
logger.warning(
3189
"disabling client {} - Client never "
3190
"performed a successful checker".format(
3191
client_name))
3192
client["enabled"] = False
3193
elif client["last_checker_status"] != 0:
3194
logger.warning(
3195
"disabling client {} - Client last"
3196
" checker failed with error code"
3197
" {}".format(
3198
client_name,
3199
client["last_checker_status"]))
3200
client["enabled"] = False
3201
else:
3202
client["expires"] = (
3203
datetime.datetime.utcnow()
3204
+ client["timeout"])
3205
logger.debug("Last checker succeeded,"
3206
" keeping {} enabled".format(
3207
client_name))
1912
3208
try:
1913
yield (name, special_settings[name]())
1914
except KeyError:
1915
yield (name, value)
1916
1917
tcp_server.clients.update(set(
1918
client_class(name = section,
1919
config= dict(client_config_items(
1920
client_config, section)))
1921
for section in client_config.sections()))
3209
client["secret"] = pgp.decrypt(
3210
client["encrypted_secret"],
3211
client_settings[client_name]["secret"])
3212
except PGPError:
3213
# If decryption fails, we use secret from new settings
3214
logger.debug("Failed to decrypt {} old secret".format(
3215
client_name))
3216
client["secret"] = (client_settings[client_name]
3217
["secret"])
3218
3219
# Add/remove clients based on new changes made to config
3220
for client_name in (set(old_client_settings)
3221
- set(client_settings)):
3222
del clients_data[client_name]
3223
for client_name in (set(client_settings)
3224
- set(old_client_settings)):
3225
clients_data[client_name] = client_settings[client_name]
3226
3227
# Create all client objects
3228
for client_name, client in clients_data.items():
3229
tcp_server.clients[client_name] = client_class(
3230
name=client_name,
3231
settings=client,
3232
server_settings=server_settings)
3233
1922
3234
if not tcp_server.clients:
1923
3235
logger.warning("No clients defined")
1924
1925
if not debug:
1926
try:
1927
with pidfile:
1928
pid = os.getpid()
1929
pidfile.write(str(pid) + "\n".encode("utf-8"))
1930
del pidfile
1931
except IOError:
1932
logger.error("Could not write to file %r with PID %d",
1933
pidfilename, pid)
1934
except NameError:
1935
# "pidfile" was never created
1936
pass
3236
3237
if not foreground:
3238
if pidfile is not None:
3239
pid = os.getpid()
3240
try:
3241
with pidfile:
3242
print(pid, file=pidfile)
3243
except IOError:
3244
logger.error("Could not write to file %r with PID %d",
3245
pidfilename, pid)
3246
del pidfile
1937
3247
del pidfilename
1938
1939
signal.signal(signal.SIGINT, signal.SIG_IGN)
1940
1941
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1942
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1943
3248
3249
for termsig in (signal.SIGHUP, signal.SIGTERM):
3250
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3251
lambda: main_loop.quit() and False)
3252
1944
3253
if use_dbus:
1945
class MandosDBusService(dbus.service.Object):
3254
3255
@alternate_dbus_interfaces(
3256
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3257
class MandosDBusService(DBusObjectWithObjectManager):
1946
3258
"""A D-Bus proxy object"""
3259
1947
3260
def __init__(self):
1948
3261
dbus.service.Object.__init__(self, bus, "/")
1949
_interface = "se.bsnet.fukt.Mandos"
1950
3262
3263
_interface = "se.recompile.Mandos"
3264
1951
3265
@dbus.service.signal(_interface, signature="o")
1952
3266
def ClientAdded(self, objpath):
1953
3267
"D-Bus signal"
1954
3268
pass
1955
3269
1956
3270
@dbus.service.signal(_interface, signature="ss")
1957
3271
def ClientNotFound(self, fingerprint, address):
1958
3272
"D-Bus signal"
1959
3273
pass
1960
3274
3275
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3276
"true"})
1961
3277
@dbus.service.signal(_interface, signature="os")
1962
3278
def ClientRemoved(self, objpath, name):
1963
3279
"D-Bus signal"
1964
3280
pass
1965
3281
3282
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3283
"true"})
1966
3284
@dbus.service.method(_interface, out_signature="ao")
1967
3285
def GetAllClients(self):
1968
3286
"D-Bus method"
1969
return dbus.Array(c.dbus_object_path
1970
for c in tcp_server.clients)
1971
3287
return dbus.Array(c.dbus_object_path for c in
3288
tcp_server.clients.values())
3289
3290
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3291
"true"})
1972
3292
@dbus.service.method(_interface,
1973
3293
out_signature="a{oa{sv}}")
1974
3294
def GetAllClientsWithProperties(self):
1975
3295
"D-Bus method"
1976
3296
return dbus.Dictionary(
1977
((c.dbus_object_path, c.GetAll(""))
1978
for c in tcp_server.clients),
3297
{c.dbus_object_path: c.GetAll(
3298
"se.recompile.Mandos.Client")
3299
for c in tcp_server.clients.values()},
1979
3300
signature="oa{sv}")
1980
3301
1981
3302
@dbus.service.method(_interface, in_signature="o")
1982
3303
def RemoveClient(self, object_path):
1983
3304
"D-Bus method"
1984
for c in tcp_server.clients:
3305
for c in tcp_server.clients.values():
1985
3306
if c.dbus_object_path == object_path:
1986
tcp_server.clients.remove(c)
3307
del tcp_server.clients[c.name]
1987
3308
c.remove_from_connection()
1988
# Don't signal anything except ClientRemoved
3309
# Don't signal the disabling
1989
3310
c.disable(quiet=True)
1990
# Emit D-Bus signal
1991
self.ClientRemoved(object_path, c.name)
3311
# Emit D-Bus signal for removal
3312
self.client_removed_signal(c)
1992
3313
return
1993
3314
raise KeyError(object_path)
1994
3315
1995
3316
del _interface
1996
3317
3318
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3319
out_signature="a{oa{sa{sv}}}")
3320
def GetManagedObjects(self):
3321
"""D-Bus method"""
3322
return dbus.Dictionary(
3323
{client.dbus_object_path:
3324
dbus.Dictionary(
3325
{interface: client.GetAll(interface)
3326
for interface in
3327
client._get_all_interface_names()})
3328
for client in tcp_server.clients.values()})
3329
3330
def client_added_signal(self, client):
3331
"""Send the new standard signal and the old signal"""
3332
if use_dbus:
3333
# New standard signal
3334
self.InterfacesAdded(
3335
client.dbus_object_path,
3336
dbus.Dictionary(
3337
{interface: client.GetAll(interface)
3338
for interface in
3339
client._get_all_interface_names()}))
3340
# Old signal
3341
self.ClientAdded(client.dbus_object_path)
3342
3343
def client_removed_signal(self, client):
3344
"""Send the new standard signal and the old signal"""
3345
if use_dbus:
3346
# New standard signal
3347
self.InterfacesRemoved(
3348
client.dbus_object_path,
3349
client._get_all_interface_names())
3350
# Old signal
3351
self.ClientRemoved(client.dbus_object_path,
3352
client.name)
3353
1997
3354
mandos_dbus_service = MandosDBusService()
1998
3355
3356
# Save modules to variables to exempt the modules from being
3357
# unloaded before the function registered with atexit() is run.
3358
mp = multiprocessing
3359
wn = wnull
3360
1999
3361
def cleanup():
2000
3362
"Cleanup function; run on exit"
2001
service.cleanup()
2002
3363
if zeroconf:
3364
service.cleanup()
3365
3366
mp.active_children()
3367
wn.close()
3368
if not (tcp_server.clients or client_settings):
3369
return
3370
3371
# Store client before exiting. Secrets are encrypted with key
3372
# based on what config file has. If config file is
3373
# removed/edited, old secret will thus be unrecovable.
3374
clients = {}
3375
with PGPEngine() as pgp:
3376
for client in tcp_server.clients.values():
3377
key = client_settings[client.name]["secret"]
3378
client.encrypted_secret = pgp.encrypt(client.secret,
3379
key)
3380
client_dict = {}
3381
3382
# A list of attributes that can not be pickled
3383
# + secret.
3384
exclude = {"bus", "changedstate", "secret",
3385
"checker", "server_settings"}
3386
for name, typ in inspect.getmembers(dbus.service
3387
.Object):
3388
exclude.add(name)
3389
3390
client_dict["encrypted_secret"] = (client
3391
.encrypted_secret)
3392
for attr in client.client_structure:
3393
if attr not in exclude:
3394
client_dict[attr] = getattr(client, attr)
3395
3396
clients[client.name] = client_dict
3397
del client_settings[client.name]["secret"]
3398
3399
try:
3400
with tempfile.NamedTemporaryFile(
3401
mode='wb',
3402
suffix=".pickle",
3403
prefix='clients-',
3404
dir=os.path.dirname(stored_state_path),
3405
delete=False) as stored_state:
3406
pickle.dump((clients, client_settings), stored_state,
3407
protocol=2)
3408
tempname = stored_state.name
3409
os.rename(tempname, stored_state_path)
3410
except (IOError, OSError) as e:
3411
if not debug:
3412
try:
3413
os.remove(tempname)
3414
except NameError:
3415
pass
3416
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
3417
logger.warning("Could not save persistent state: {}"
3418
.format(os.strerror(e.errno)))
3419
else:
3420
logger.warning("Could not save persistent state:",
3421
exc_info=e)
3422
raise
3423
3424
# Delete all clients, and settings from config
2003
3425
while tcp_server.clients:
2004
client = tcp_server.clients.pop()
3426
name, client = tcp_server.clients.popitem()
2005
3427
if use_dbus:
2006
3428
client.remove_from_connection()
2007
client.disable_hook = None
2008
# Don't signal anything except ClientRemoved
3429
# Don't signal the disabling
2009
3430
client.disable(quiet=True)
3431
# Emit D-Bus signal for removal
2010
3432
if use_dbus:
2011
# Emit D-Bus signal
2012
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
2013
client.name)
2014
3433
mandos_dbus_service.client_removed_signal(client)
3434
client_settings.clear()
3435
2015
3436
atexit.register(cleanup)
2016
2017
for client in tcp_server.clients:
3437
3438
for client in tcp_server.clients.values():
2018
3439
if use_dbus:
2019
# Emit D-Bus signal
2020
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2021
client.enable()
2022
3440
# Emit D-Bus signal for adding
3441
mandos_dbus_service.client_added_signal(client)
3442
# Need to initiate checking of clients
3443
if client.enabled:
3444
client.init_checker()
3445
2023
3446
tcp_server.enable()
2024
3447
tcp_server.server_activate()
2025
3448
2026
3449
# Find out what port we got
2027
service.port = tcp_server.socket.getsockname()[1]
3450
if zeroconf:
3451
service.port = tcp_server.socket.getsockname()[1]
2028
3452
if use_ipv6:
2029
3453
logger.info("Now listening on address %r, port %d,"
2030
" flowinfo %d, scope_id %d"
2031
% tcp_server.socket.getsockname())
3454
" flowinfo %d, scope_id %d",
3455
*tcp_server.socket.getsockname())
2032
3456
else: # IPv4
2033
logger.info("Now listening on address %r, port %d"
2034
% tcp_server.socket.getsockname())
2035
2036
#service.interface = tcp_server.socket.getsockname()[3]
2037
3457
logger.info("Now listening on address %r, port %d",
3458
*tcp_server.socket.getsockname())
3459
3460
# service.interface = tcp_server.socket.getsockname()[3]
3461
2038
3462
try:
2039
# From the Avahi example code
2040
try:
2041
service.activate()
2042
except dbus.exceptions.DBusException as error:
2043
logger.critical("DBusException: %s", error)
2044
cleanup()
2045
sys.exit(1)
2046
# End of Avahi example code
2047
2048
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2049
lambda *args, **kwargs:
2050
(tcp_server.handle_request
2051
(*args[2:], **kwargs) or True))
2052
3463
if zeroconf:
3464
# From the Avahi example code
3465
try:
3466
service.activate()
3467
except dbus.exceptions.DBusException as error:
3468
logger.critical("D-Bus Exception", exc_info=error)
3469
cleanup()
3470
sys.exit(1)
3471
# End of Avahi example code
3472
3473
GLib.io_add_watch(tcp_server.fileno(), GLib.IO_IN,
3474
lambda *args, **kwargs:
3475
(tcp_server.handle_request
3476
(*args[2:], **kwargs) or True))
3477
2053
3478
logger.debug("Starting main loop")
2054
3479
main_loop.run()
2055
3480
except AvahiError as error:
2056
logger.critical("AvahiError: %s", error)
3481
logger.critical("Avahi Error", exc_info=error)
2057
3482
cleanup()
2058
3483
sys.exit(1)
2059
3484
except KeyboardInterrupt:
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0