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- Committer: Teddy Hogeborn
- Date: 2011-09-26 19:36:18 UTC
- mfrom: (24.1.184 mandos)
- Revision ID: teddy@fukt.bsnet.se-20110926193618-vtj5c9hena1maixx
Merge from Björn
- files removed:
- bugs.xml
- debian/upstream
- network-hooks.d
- plugin-helpers
- files modified:
- .bzrignore
added
removed
mandos
1
1
#!/usr/bin/python
2
2
# -*- mode: python; coding: utf-8 -*-
3
#
3
#
4
4
# Mandos server - give out binary blobs to connecting clients.
5
#
5
#
6
6
# This program is partly derived from an example program for an Avahi
7
7
# service publisher, downloaded from
8
8
# <http://avahi.org/wiki/PythonPublishExample>. This includes the
9
9
# methods "add", "remove", "server_state_changed",
10
10
# "entry_group_state_changed", "cleanup", and "activate" in the
11
11
# "AvahiService" class, and some lines in "main".
12
#
12
#
13
13
# Everything else is
14
# Copyright © 2008-2017 Teddy Hogeborn
15
# Copyright © 2008-2017 Björn Påhlsson
16
#
17
# This file is part of Mandos.
18
#
19
# Mandos is free software: you can redistribute it and/or modify it
20
# under the terms of the GNU General Public License as published by
14
# Copyright © 2008-2011 Teddy Hogeborn
15
# Copyright © 2008-2011 Björn Påhlsson
16
#
17
# This program is free software: you can redistribute it and/or modify
18
# it under the terms of the GNU General Public License as published by
21
19
# the Free Software Foundation, either version 3 of the License, or
22
20
# (at your option) any later version.
23
21
#
24
# Mandos is distributed in the hope that it will be useful, but
25
# WITHOUT ANY WARRANTY; without even the implied warranty of
22
# This program is distributed in the hope that it will be useful,
23
# but WITHOUT ANY WARRANTY; without even the implied warranty of
26
24
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
27
25
# GNU General Public License for more details.
28
#
26
#
29
27
# You should have received a copy of the GNU General Public License
30
# along with Mandos. If not, see <http://www.gnu.org/licenses/>.
31
#
32
# Contact the authors at <mandos@recompile.se>.
33
#
28
# along with this program. If not, see
29
# <http://www.gnu.org/licenses/>.
30
#
31
# Contact the authors at <mandos@fukt.bsnet.se>.
32
#
34
33
35
34
from __future__ import (division, absolute_import, print_function,
36
35
unicode_literals)
37
36
38
try:
39
from future_builtins import *
40
except ImportError:
41
pass
42
43
try:
44
import SocketServer as socketserver
45
except ImportError:
46
import socketserver
37
import SocketServer as socketserver
47
38
import socket
48
39
import argparse
49
40
import datetime
50
41
import errno
51
try:
52
import ConfigParser as configparser
53
except ImportError:
54
import configparser
42
import gnutls.crypto
43
import gnutls.connection
44
import gnutls.errors
45
import gnutls.library.functions
46
import gnutls.library.constants
47
import gnutls.library.types
48
import ConfigParser as configparser
55
49
import sys
56
50
import re
57
51
import os
66
60
import struct
67
61
import fcntl
68
62
import functools
69
try:
70
import cPickle as pickle
71
except ImportError:
72
import pickle
63
import cPickle as pickle
73
64
import multiprocessing
74
import types
75
import binascii
76
import tempfile
77
import itertools
78
import collections
79
import codecs
80
65
81
66
import dbus
82
67
import dbus.service
83
from gi.repository import GLib
68
import gobject
69
import avahi
84
70
from dbus.mainloop.glib import DBusGMainLoop
85
71
import ctypes
86
72
import ctypes.util
87
73
import xml.dom.minidom
88
74
import inspect
89
75
90
# Try to find the value of SO_BINDTODEVICE:
91
76
try:
92
# This is where SO_BINDTODEVICE is in Python 3.3 (or 3.4?) and
93
# newer, and it is also the most natural place for it:
94
77
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
95
78
except AttributeError:
96
79
try:
97
# This is where SO_BINDTODEVICE was up to and including Python
98
# 2.6, and also 3.2:
99
80
from IN import SO_BINDTODEVICE
100
81
except ImportError:
101
# In Python 2.7 it seems to have been removed entirely.
102
# Try running the C preprocessor:
103
try:
104
cc = subprocess.Popen(["cc", "--language=c", "-E",
105
"/dev/stdin"],
106
stdin=subprocess.PIPE,
107
stdout=subprocess.PIPE)
108
stdout = cc.communicate(
109
"#include <sys/socket.h>\nSO_BINDTODEVICE\n")[0]
110
SO_BINDTODEVICE = int(stdout.splitlines()[-1])
111
except (OSError, ValueError, IndexError):
112
# No value found
113
SO_BINDTODEVICE = None
114
115
if sys.version_info.major == 2:
116
str = unicode
117
118
version = "1.7.15"
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
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)
303
102
304
103
class AvahiError(Exception):
305
104
def __init__(self, value, *args, **kwargs):
306
105
self.value = value
307
return super(AvahiError, self).__init__(value, *args,
308
**kwargs)
309
106
super(AvahiError, self).__init__(value, *args, **kwargs)
107
def __unicode__(self):
108
return unicode(repr(self.value))
310
109
311
110
class AvahiServiceError(AvahiError):
312
111
pass
313
112
314
315
113
class AvahiGroupError(AvahiError):
316
114
pass
317
115
318
116
319
117
class AvahiService(object):
320
118
"""An Avahi (Zeroconf) service.
321
119
322
120
Attributes:
323
121
interface: integer; avahi.IF_UNSPEC or an interface index.
324
122
Used to optionally bind to the specified interface.
325
123
name: string; Example: 'Mandos'
326
124
type: string; Example: '_mandos._tcp'.
327
See <https://www.iana.org/assignments/service-names-port-numbers>
125
See <http://www.dns-sd.org/ServiceTypes.html>
328
126
port: integer; what port to announce
329
127
TXT: list of strings; TXT record for the service
330
128
domain: string; Domain to publish on, default to .local if empty.
336
134
server: D-Bus Server
337
135
bus: dbus.SystemBus()
338
136
"""
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):
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):
351
141
self.interface = interface
352
142
self.name = name
353
143
self.type = servicetype
362
152
self.server = None
363
153
self.bus = bus
364
154
self.entry_group_state_changed_match = None
365
366
def rename(self, remove=True):
155
def rename(self):
367
156
"""Derived from the Avahi example code"""
368
157
if self.rename_count >= self.max_renames:
369
158
logger.critical("No suitable Zeroconf service name found"
370
159
" after %i retries, exiting.",
371
160
self.rename_count)
372
161
raise AvahiServiceError("Too many renames")
373
self.name = str(
374
self.server.GetAlternativeServiceName(self.name))
375
self.rename_count += 1
162
self.name = unicode(self.server.GetAlternativeServiceName(self.name))
376
163
logger.info("Changing Zeroconf service name to %r ...",
377
164
self.name)
378
if remove:
379
self.remove()
165
syslogger.setFormatter(logging.Formatter
166
('Mandos (%s) [%%(process)d]:'
167
' %%(levelname)s: %%(message)s'
168
% self.name))
169
self.remove()
380
170
try:
381
171
self.add()
382
172
except dbus.exceptions.DBusException as error:
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
173
logger.critical("DBusException: %s", error)
174
self.cleanup()
175
os._exit(1)
176
self.rename_count += 1
392
177
def remove(self):
393
178
"""Derived from the Avahi example code"""
394
179
if self.entry_group_state_changed_match is not None:
396
181
self.entry_group_state_changed_match = None
397
182
if self.group is not None:
398
183
self.group.Reset()
399
400
184
def add(self):
401
185
"""Derived from the Avahi example code"""
402
186
self.remove()
407
191
avahi.DBUS_INTERFACE_ENTRY_GROUP)
408
192
self.entry_group_state_changed_match = (
409
193
self.group.connect_to_signal(
410
'StateChanged', self.entry_group_state_changed))
194
'StateChanged', self .entry_group_state_changed))
411
195
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
412
196
self.name, self.type)
413
197
self.group.AddService(
419
203
dbus.UInt16(self.port),
420
204
avahi.string_array_to_txt_array(self.TXT))
421
205
self.group.Commit()
422
423
206
def entry_group_state_changed(self, state, error):
424
207
"""Derived from the Avahi example code"""
425
208
logger.debug("Avahi entry group state change: %i", state)
426
209
427
210
if state == avahi.ENTRY_GROUP_ESTABLISHED:
428
211
logger.debug("Zeroconf service established.")
429
212
elif state == avahi.ENTRY_GROUP_COLLISION:
431
214
self.rename()
432
215
elif state == avahi.ENTRY_GROUP_FAILURE:
433
216
logger.critical("Avahi: Error in group state changed %s",
434
str(error))
435
raise AvahiGroupError("State changed: {!s}".format(error))
436
217
unicode(error))
218
raise AvahiGroupError("State changed: %s"
219
% unicode(error))
437
220
def cleanup(self):
438
221
"""Derived from the Avahi example code"""
439
222
if self.group is not None:
440
223
try:
441
224
self.group.Free()
442
225
except (dbus.exceptions.UnknownMethodException,
443
dbus.exceptions.DBusException):
226
dbus.exceptions.DBusException) as e:
444
227
pass
445
228
self.group = None
446
229
self.remove()
447
448
230
def server_state_changed(self, state, error=None):
449
231
"""Derived from the Avahi example code"""
450
232
logger.debug("Avahi server state change: %i", state)
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
}
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" }
457
240
if state in bad_states:
458
241
if bad_states[state] is not None:
459
242
if error is None:
462
245
logger.error(bad_states[state] + ": %r", error)
463
246
self.cleanup()
464
247
elif state == avahi.SERVER_RUNNING:
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)
248
self.add()
477
249
else:
478
250
if error is None:
479
251
logger.debug("Unknown state: %r", state)
480
252
else:
481
253
logger.debug("Unknown state: %r: %r", state, error)
482
483
254
def activate(self):
484
255
"""Derived from the Avahi example code"""
485
256
if self.server is None:
489
260
follow_name_owner_changes=True),
490
261
avahi.DBUS_INTERFACE_SERVER)
491
262
self.server.connect_to_signal("StateChanged",
492
self.server_state_changed)
263
self.server_state_changed)
493
264
self.server_state_changed(self.server.GetState())
494
265
495
266
496
class AvahiServiceToSyslog(AvahiService):
497
def rename(self, *args, **kwargs):
498
"""Add the new name to the syslog messages"""
499
ret = AvahiService.rename(self, *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
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
780
273
class Client(object):
781
274
"""A representation of a client host served by this server.
782
275
783
276
Attributes:
784
approved: bool(); 'None' if not yet approved/disapproved
277
_approved: bool(); 'None' if not yet approved/disapproved
785
278
approval_delay: datetime.timedelta(); Time to wait for approval
786
279
approval_duration: datetime.timedelta(); Duration of one approval
787
280
checker: subprocess.Popen(); a running checker process used
788
281
to see if the client lives.
789
282
'None' if no process is running.
790
checker_callback_tag: a GLib event source tag, or None
283
checker_callback_tag: a gobject event source tag, or None
791
284
checker_command: string; External command which is run to check
792
285
if client lives. %() expansions are done at
793
286
runtime with vars(self) as dict, so that for
794
287
instance %(name)s can be used in the command.
795
checker_initiator_tag: a GLib event source tag, or None
288
checker_initiator_tag: a gobject event source tag, or None
796
289
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
799
290
current_checker_command: string; current running checker_command
800
disable_initiator_tag: a GLib event source tag, or None
291
disable_hook: If set, called by disable() as disable_hook(self)
292
disable_initiator_tag: a gobject event source tag, or None
801
293
enabled: bool()
802
294
fingerprint: string (40 or 32 hexadecimal digits); used to
803
295
uniquely identify the client
805
297
interval: datetime.timedelta(); How often to start a new checker
806
298
last_approval_request: datetime.datetime(); (UTC) or None
807
299
last_checked_ok: datetime.datetime(); (UTC) or None
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
300
last_enabled: datetime.datetime(); (UTC)
814
301
name: string; from the config file, used in log messages and
815
302
D-Bus identifiers
816
303
secret: bytestring; sent verbatim (over TLS) to client
817
304
timeout: datetime.timedelta(); How long from last_checked_ok
818
305
until this client is disabled
819
extended_timeout: extra long timeout when secret has been sent
306
extended_timeout: extra long timeout when password has been sent
820
307
runtime_expansions: Allowed attributes for runtime expansion.
821
308
expires: datetime.datetime(); time (UTC) when a client will be
822
309
disabled, or None
823
server_settings: The server_settings dict from main()
824
310
"""
825
311
826
312
runtime_expansions = ("approval_delay", "approval_duration",
827
"created", "enabled", "expires",
828
"fingerprint", "host", "interval",
829
"last_approval_request", "last_checked_ok",
313
"created", "enabled", "fingerprint",
314
"host", "interval", "last_checked_ok",
830
315
"last_enabled", "name", "timeout")
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):
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."""
896
336
self.name = name
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
337
if config is None:
338
config = {}
914
339
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(" ", ""))
915
345
logger.debug(" Fingerprint: %s", self.fingerprint)
916
self.created = settings.get("created",
917
datetime.datetime.utcnow())
918
919
# attributes specific for this server instance
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
920
366
self.checker = None
921
367
self.checker_initiator_tag = None
922
368
self.disable_initiator_tag = None
369
self.expires = None
923
370
self.checker_callback_tag = None
371
self.checker_command = config["checker"]
924
372
self.current_checker_command = None
925
self.approved = None
373
self.last_connect = None
374
self._approved = None
375
self.approved_by_default = config.get("approved_by_default",
376
True)
926
377
self.approvals_pending = 0
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
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
940
384
def send_changedstate(self):
941
with self.changedstate:
942
self.changedstate.notify_all()
943
385
self.changedstate.acquire()
386
self.changedstate.notify_all()
387
self.changedstate.release()
388
944
389
def enable(self):
945
390
"""Start this client's checker and timeout hooks"""
946
391
if getattr(self, "enabled", False):
947
392
# Already enabled
948
393
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
949
401
self.expires = datetime.datetime.utcnow() + self.timeout
402
self.disable_initiator_tag = (gobject.timeout_add
403
(self.timeout_milliseconds(),
404
self.disable))
950
405
self.enabled = True
951
406
self.last_enabled = datetime.datetime.utcnow()
952
self.init_checker()
953
self.send_changedstate()
954
407
# Also start a new checker *right now*.
408
self.start_checker()
409
955
410
def disable(self, quiet=True):
956
411
"""Disable this client."""
957
412
if not getattr(self, "enabled", False):
958
413
return False
959
414
if not quiet:
415
self.send_changedstate()
416
if not quiet:
960
417
logger.info("Disabling client %s", self.name)
961
if getattr(self, "disable_initiator_tag", None) is not None:
962
GLib.source_remove(self.disable_initiator_tag)
418
if getattr(self, "disable_initiator_tag", False):
419
gobject.source_remove(self.disable_initiator_tag)
963
420
self.disable_initiator_tag = None
964
421
self.expires = None
965
if getattr(self, "checker_initiator_tag", None) is not None:
966
GLib.source_remove(self.checker_initiator_tag)
422
if getattr(self, "checker_initiator_tag", False):
423
gobject.source_remove(self.checker_initiator_tag)
967
424
self.checker_initiator_tag = None
968
425
self.stop_checker()
426
if self.disable_hook:
427
self.disable_hook(self)
969
428
self.enabled = False
970
if not quiet:
971
self.send_changedstate()
972
# Do not run this again if called by a GLib.timeout_add
429
# Do not run this again if called by a gobject.timeout_add
973
430
return False
974
431
975
432
def __del__(self):
433
self.disable_hook = None
976
434
self.disable()
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):
435
436
def checker_callback(self, pid, condition, command):
996
437
"""The checker has completed, so take appropriate actions."""
997
438
self.checker_callback_tag = None
998
439
self.checker = None
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:
440
if os.WIFEXITED(condition):
441
exitstatus = os.WEXITSTATUS(condition)
442
if exitstatus == 0:
1007
443
logger.info("Checker for %(name)s succeeded",
1008
444
vars(self))
1009
445
self.checked_ok()
1010
446
else:
1011
logger.info("Checker for %(name)s failed", vars(self))
447
logger.info("Checker for %(name)s failed",
448
vars(self))
1012
449
else:
1013
self.last_checker_status = -1
1014
self.last_checker_signal = -returncode
1015
450
logger.warning("Checker for %(name)s crashed?",
1016
451
vars(self))
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."""
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
"""
1028
459
if timeout is None:
1029
460
timeout = self.timeout
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
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
1038
468
def need_approval(self):
1039
469
self.last_approval_request = datetime.datetime.utcnow()
1040
470
1041
471
def start_checker(self):
1042
472
"""Start a new checker subprocess if one is not running.
1043
473
1044
474
If a checker already exists, leave it running and do
1045
475
nothing."""
1046
476
# The reason for not killing a running checker is that if we
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
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
1051
481
# checkers alone, the checker would have to take more time
1052
482
# than 'timeout' for the client to be disabled, which is as it
1053
483
# should be.
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
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)
1059
498
# Start a new checker if needed
1060
499
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}
1065
500
try:
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
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
1072
519
self.current_checker_command = command
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
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
1099
544
return True
1100
545
1101
546
def stop_checker(self):
1102
547
"""Force the checker process, if any, to stop."""
1103
548
if self.checker_callback_tag:
1104
GLib.source_remove(self.checker_callback_tag)
549
gobject.source_remove(self.checker_callback_tag)
1105
550
self.checker_callback_tag = None
1106
551
if getattr(self, "checker", None) is None:
1107
552
return
1108
553
logger.debug("Stopping checker for %(name)s", vars(self))
1109
self.checker.terminate()
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
1110
562
self.checker = None
1111
563
1112
1113
def dbus_service_property(dbus_interface,
1114
signature="v",
1115
access="readwrite",
1116
byte_arrays=False):
564
def dbus_service_property(dbus_interface, signature="v",
565
access="readwrite", byte_arrays=False):
1117
566
"""Decorators for marking methods of a DBusObjectWithProperties to
1118
567
become properties on the D-Bus.
1119
568
1120
569
The decorated method will be called with no arguments by "Get"
1121
570
and with one argument by "Set".
1122
571
1123
572
The parameters, where they are supported, are the same as
1124
573
dbus.service.method, except there is only "signature", since the
1125
574
type from Get() and the type sent to Set() is the same.
1128
577
# "Set" method, so we fail early here:
1129
578
if byte_arrays and signature != "ay":
1130
579
raise ValueError("Byte arrays not supported for non-'ay'"
1131
" signature {!r}".format(signature))
1132
580
" signature %r" % signature)
1133
581
def decorator(func):
1134
582
func._dbus_is_property = True
1135
583
func._dbus_interface = dbus_interface
1138
586
func._dbus_name = func.__name__
1139
587
if func._dbus_name.endswith("_dbus_property"):
1140
588
func._dbus_name = func._dbus_name[:-14]
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
589
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
590
return func
1187
591
return decorator
1188
592
1189
593
1190
594
class DBusPropertyException(dbus.exceptions.DBusException):
1191
595
"""A base class for D-Bus property-related exceptions
1192
596
"""
1193
pass
597
def __unicode__(self):
598
return unicode(str(self))
1194
599
1195
600
1196
601
class DBusPropertyAccessException(DBusPropertyException):
1205
610
pass
1206
611
1207
612
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):
613
class DBusObjectWithProperties(dbus.service.Object):
1298
614
"""A D-Bus object with properties.
1299
615
1300
616
Classes inheriting from this can use the dbus_service_property
1301
617
decorator to expose methods as D-Bus properties. It exposes the
1302
618
standard Get(), Set(), and GetAll() methods on the D-Bus.
1303
619
"""
1304
620
621
@staticmethod
622
def _is_dbus_property(obj):
623
return getattr(obj, "_dbus_is_property", False)
624
625
def _get_all_dbus_properties(self):
626
"""Returns a generator of (name, attribute) pairs
627
"""
628
return ((prop._dbus_name, prop)
629
for name, prop in
630
inspect.getmembers(self, self._is_dbus_property))
631
1305
632
def _get_dbus_property(self, interface_name, property_name):
1306
633
"""Returns a bound method if one exists which is a D-Bus
1307
634
property with the specified name and interface.
1308
635
"""
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
636
for name in (property_name,
637
property_name + "_dbus_property"):
638
prop = getattr(self, name, None)
639
if (prop is None
640
or not self._is_dbus_property(prop)
641
or prop._dbus_name != property_name
642
or (interface_name and prop._dbus_interface
643
and interface_name != prop._dbus_interface)):
644
continue
645
return prop
1316
646
# No such property
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",
647
raise DBusPropertyNotFound(self.dbus_object_path + ":"
648
+ interface_name + "."
649
+ property_name)
650
651
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
1331
652
out_signature="v")
1332
653
def Get(self, interface_name, property_name):
1333
654
"""Standard D-Bus property Get() method, see D-Bus standard.
1339
660
if not hasattr(value, "variant_level"):
1340
661
return value
1341
662
return type(value)(value, variant_level=value.variant_level+1)
1342
663
1343
664
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
1344
665
def Set(self, interface_name, property_name, value):
1345
666
"""Standard D-Bus property Set() method, see D-Bus standard.
1351
672
# The byte_arrays option is not supported yet on
1352
673
# signatures other than "ay".
1353
674
if prop._dbus_signature != "ay":
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))
675
raise ValueError
676
value = dbus.ByteArray(''.join(unichr(byte)
677
for byte in value))
1359
678
prop(value)
1360
1361
@dbus.service.method(dbus.PROPERTIES_IFACE,
1362
in_signature="s",
679
680
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
1363
681
out_signature="a{sv}")
1364
682
def GetAll(self, interface_name):
1365
683
"""Standard D-Bus property GetAll() method, see D-Bus
1367
685
1368
686
Note: Will not include properties with access="write".
1369
687
"""
1370
properties = {}
1371
for name, prop in self._get_all_dbus_things("property"):
688
all = {}
689
for name, prop in self._get_all_dbus_properties():
1372
690
if (interface_name
1373
691
and interface_name != prop._dbus_interface):
1374
692
# Interface non-empty but did not match
1378
696
continue
1379
697
value = prop()
1380
698
if not hasattr(value, "variant_level"):
1381
properties[name] = value
699
all[name] = value
1382
700
continue
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
701
all[name] = type(value)(value, variant_level=
702
value.variant_level+1)
703
return dbus.Dictionary(all, signature="sv")
704
1395
705
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1396
706
out_signature="s",
1397
707
path_keyword='object_path',
1398
708
connection_keyword='connection')
1399
709
def Introspect(self, object_path, connection):
1400
"""Overloading of standard D-Bus method.
1401
1402
Inserts property tags and interface annotation tags.
710
"""Standard D-Bus method, overloaded to insert property tags.
1403
711
"""
1404
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1405
object_path,
1406
connection)
712
xmlstring = dbus.service.Object.Introspect(self, object_path,
713
connection)
1407
714
try:
1408
715
document = xml.dom.minidom.parseString(xmlstring)
1409
1410
716
def make_tag(document, name, prop):
1411
717
e = document.createElement("property")
1412
718
e.setAttribute("name", name)
1413
719
e.setAttribute("type", prop._dbus_signature)
1414
720
e.setAttribute("access", prop._dbus_access)
1415
721
return e
1416
1417
722
for if_tag in document.getElementsByTagName("interface"):
1418
# Add property tags
1419
723
for tag in (make_tag(document, name, prop)
1420
724
for name, prop
1421
in self._get_all_dbus_things("property")
725
in self._get_all_dbus_properties()
1422
726
if prop._dbus_interface
1423
727
== if_tag.getAttribute("name")):
1424
728
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)
1441
729
# Add the names to the return values for the
1442
730
# "org.freedesktop.DBus.Properties" methods
1443
731
if (if_tag.getAttribute("name")
1458
746
except (AttributeError, xml.dom.DOMException,
1459
747
xml.parsers.expat.ExpatError) as error:
1460
748
logger.error("Failed to override Introspection method",
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):
749
error)
750
return xmlstring
751
752
753
def datetime_to_dbus (dt, variant_level=0):
1537
754
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1538
755
if dt is None:
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"})
756
return dbus.String("", variant_level = variant_level)
757
return dbus.String(dt.isoformat(),
758
variant_level=variant_level)
759
1714
760
class ClientDBus(Client, DBusObjectWithProperties):
1715
761
"""A Client class using D-Bus
1716
762
1717
763
Attributes:
1718
764
dbus_object_path: dbus.ObjectPath
1719
765
bus: dbus.SystemBus()
1720
766
"""
1721
767
1722
768
runtime_expansions = (Client.runtime_expansions
1723
+ ("dbus_object_path", ))
1724
1725
_interface = "se.recompile.Mandos.Client"
1726
769
+ ("dbus_object_path",))
770
1727
771
# dbus.service.Object doesn't use super(), so we can't either.
1728
1729
def __init__(self, bus=None, *args, **kwargs):
772
773
def __init__(self, bus = None, *args, **kwargs):
774
self._approvals_pending = 0
1730
775
self.bus = bus
1731
776
Client.__init__(self, *args, **kwargs)
1732
777
# Only now, when this client is initialized, can it show up on
1733
778
# the D-Bus
1734
client_object_name = str(self.name).translate(
779
client_object_name = unicode(self.name).translate(
1735
780
{ord("."): ord("_"),
1736
781
ord("-"): ord("_")})
1737
self.dbus_object_path = dbus.ObjectPath(
1738
"/clients/" + client_object_name)
782
self.dbus_object_path = (dbus.ObjectPath
783
("/clients/" + client_object_name))
1739
784
DBusObjectWithProperties.__init__(self, self.bus,
1740
785
self.dbus_object_path)
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
786
787
def notifychangeproperty(transform_func,
788
dbus_name, type_func=lambda x: x,
789
variant_level=1):
790
""" Modify a variable so that its a property that announce its
791
changes to DBus.
792
transform_fun: Function that takes a value and transform it to
793
DBus type.
794
dbus_name: DBus name of the variable
1753
795
type_func: Function that transform the value before sending it
1754
to the D-Bus. Default: no transform
1755
variant_level: D-Bus variant level. Default: 1
796
to DBus
797
variant_level: DBus variant level. default: 1
1756
798
"""
1757
attrname = "_{}".format(dbus_name)
1758
799
real_value = [None,]
1759
800
def setter(self, value):
801
old_value = real_value[0]
802
real_value[0] = value
1760
803
if hasattr(self, "dbus_object_path"):
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)
804
if type_func(old_value) != type_func(real_value[0]):
805
dbus_value = transform_func(type_func(real_value[0]),
806
variant_level)
807
self.PropertyChanged(dbus.String(dbus_name),
808
dbus_value)
809
810
return property(lambda self: real_value[0], setter)
811
1782
812
1783
813
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1784
814
approvals_pending = notifychangeproperty(dbus.Boolean,
1785
815
"ApprovalPending",
1786
type_func=bool)
816
type_func = bool)
1787
817
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1788
818
last_enabled = notifychangeproperty(datetime_to_dbus,
1789
819
"LastEnabled")
1790
checker = notifychangeproperty(
1791
dbus.Boolean, "CheckerRunning",
1792
type_func=lambda checker: checker is not None)
820
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
821
type_func = lambda checker: checker is not None)
1793
822
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1794
823
"LastCheckedOK")
1795
last_checker_status = notifychangeproperty(dbus.Int16,
1796
"LastCheckerStatus")
1797
last_approval_request = notifychangeproperty(
1798
datetime_to_dbus, "LastApprovalRequest")
824
last_approval_request = notifychangeproperty(datetime_to_dbus,
825
"LastApprovalRequest")
1799
826
approved_by_default = notifychangeproperty(dbus.Boolean,
1800
827
"ApprovedByDefault")
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)
828
approval_delay = notifychangeproperty(dbus.UInt16, "ApprovalDelay",
829
type_func = _timedelta_to_milliseconds)
830
approval_duration = notifychangeproperty(dbus.UInt16, "ApprovalDuration",
831
type_func = _timedelta_to_milliseconds)
1807
832
host = notifychangeproperty(dbus.String, "Host")
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)
833
timeout = notifychangeproperty(dbus.UInt16, "Timeout",
834
type_func = _timedelta_to_milliseconds)
835
extended_timeout = notifychangeproperty(dbus.UInt16, "ExtendedTimeout",
836
type_func = _timedelta_to_milliseconds)
837
interval = notifychangeproperty(dbus.UInt16, "Interval",
838
type_func = _timedelta_to_milliseconds)
1817
839
checker_command = notifychangeproperty(dbus.String, "Checker")
1818
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1819
invalidate_only=True)
1820
840
1821
841
del notifychangeproperty
1822
842
1823
843
def __del__(self, *args, **kwargs):
1824
844
try:
1825
845
self.remove_from_connection()
1828
848
if hasattr(DBusObjectWithProperties, "__del__"):
1829
849
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1830
850
Client.__del__(self, *args, **kwargs)
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:
851
852
def checker_callback(self, pid, condition, command,
853
*args, **kwargs):
854
self.checker_callback_tag = None
855
self.checker = None
856
if os.WIFEXITED(condition):
857
exitstatus = os.WEXITSTATUS(condition)
1839
858
# Emit D-Bus signal
1840
859
self.CheckerCompleted(dbus.Int16(exitstatus),
1841
# This is specific to GNU libC
1842
dbus.Int64(exitstatus << 8),
860
dbus.Int64(condition),
1843
861
dbus.String(command))
1844
862
else:
1845
863
# Emit D-Bus signal
1846
864
self.CheckerCompleted(dbus.Int16(-1),
1847
dbus.Int64(
1848
# This is specific to GNU libC
1849
(exitstatus << 8)
1850
| self.last_checker_signal),
865
dbus.Int64(condition),
1851
866
dbus.String(command))
1852
return ret
867
868
return Client.checker_callback(self, pid, condition, command,
869
*args, **kwargs)
1853
870
1854
871
def start_checker(self, *args, **kwargs):
1855
old_checker_pid = getattr(self.checker, "pid", None)
872
old_checker = self.checker
873
if self.checker is not None:
874
old_checker_pid = self.checker.pid
875
else:
876
old_checker_pid = None
1856
877
r = Client.start_checker(self, *args, **kwargs)
1857
878
# Only if new checker process was started
1858
879
if (self.checker is not None
1860
881
# Emit D-Bus signal
1861
882
self.CheckerStarted(self.current_checker_command)
1862
883
return r
1863
884
1864
885
def _reset_approved(self):
1865
self.approved = None
886
self._approved = None
1866
887
return False
1867
888
1868
889
def approve(self, value=True):
1869
self.approved = value
1870
GLib.timeout_add(int(self.approval_duration.total_seconds()
1871
* 1000), self._reset_approved)
1872
890
self.send_changedstate()
1873
1874
# D-Bus methods, signals & properties
1875
1876
# Interfaces
1877
1878
# Signals
1879
891
self._approved = value
892
gobject.timeout_add(_timedelta_to_milliseconds
893
(self.approval_duration),
894
self._reset_approved)
895
896
897
## D-Bus methods, signals & properties
898
_interface = "se.bsnet.fukt.Mandos.Client"
899
900
## Signals
901
1880
902
# CheckerCompleted - signal
1881
903
@dbus.service.signal(_interface, signature="nxs")
1882
904
def CheckerCompleted(self, exitcode, waitstatus, command):
1883
905
"D-Bus signal"
1884
906
pass
1885
907
1886
908
# CheckerStarted - signal
1887
909
@dbus.service.signal(_interface, signature="s")
1888
910
def CheckerStarted(self, command):
1889
911
"D-Bus signal"
1890
912
pass
1891
913
1892
914
# PropertyChanged - signal
1893
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1894
915
@dbus.service.signal(_interface, signature="sv")
1895
916
def PropertyChanged(self, property, value):
1896
917
"D-Bus signal"
1897
918
pass
1898
919
1899
920
# GotSecret - signal
1900
921
@dbus.service.signal(_interface)
1901
922
def GotSecret(self):
1904
925
server to mandos-client
1905
926
"""
1906
927
pass
1907
928
1908
929
# Rejected - signal
1909
930
@dbus.service.signal(_interface, signature="s")
1910
931
def Rejected(self, reason):
1911
932
"D-Bus signal"
1912
933
pass
1913
934
1914
935
# NeedApproval - signal
1915
936
@dbus.service.signal(_interface, signature="tb")
1916
937
def NeedApproval(self, timeout, default):
1917
938
"D-Bus signal"
1918
939
return self.need_approval()
1919
1920
# Methods
1921
940
941
## Methods
942
1922
943
# Approve - method
1923
944
@dbus.service.method(_interface, in_signature="b")
1924
945
def Approve(self, value):
1925
946
self.approve(value)
1926
947
1927
948
# CheckedOK - method
1928
949
@dbus.service.method(_interface)
1929
950
def CheckedOK(self):
1930
951
self.checked_ok()
1931
952
1932
953
# Enable - method
1933
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1934
954
@dbus.service.method(_interface)
1935
955
def Enable(self):
1936
956
"D-Bus method"
1937
957
self.enable()
1938
958
1939
959
# StartChecker - method
1940
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1941
960
@dbus.service.method(_interface)
1942
961
def StartChecker(self):
1943
962
"D-Bus method"
1944
963
self.start_checker()
1945
964
1946
965
# Disable - method
1947
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1948
966
@dbus.service.method(_interface)
1949
967
def Disable(self):
1950
968
"D-Bus method"
1951
969
self.disable()
1952
970
1953
971
# StopChecker - method
1954
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1955
972
@dbus.service.method(_interface)
1956
973
def StopChecker(self):
1957
974
self.stop_checker()
1958
1959
# Properties
1960
975
976
## Properties
977
1961
978
# ApprovalPending - property
1962
979
@dbus_service_property(_interface, signature="b", access="read")
1963
980
def ApprovalPending_dbus_property(self):
1964
981
return dbus.Boolean(bool(self.approvals_pending))
1965
982
1966
983
# ApprovedByDefault - property
1967
@dbus_service_property(_interface,
1968
signature="b",
984
@dbus_service_property(_interface, signature="b",
1969
985
access="readwrite")
1970
986
def ApprovedByDefault_dbus_property(self, value=None):
1971
987
if value is None: # get
1972
988
return dbus.Boolean(self.approved_by_default)
1973
989
self.approved_by_default = bool(value)
1974
990
1975
991
# ApprovalDelay - property
1976
@dbus_service_property(_interface,
1977
signature="t",
992
@dbus_service_property(_interface, signature="t",
1978
993
access="readwrite")
1979
994
def ApprovalDelay_dbus_property(self, value=None):
1980
995
if value is None: # get
1981
return dbus.UInt64(self.approval_delay.total_seconds()
1982
* 1000)
996
return dbus.UInt64(self.approval_delay_milliseconds())
1983
997
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1984
998
1985
999
# ApprovalDuration - property
1986
@dbus_service_property(_interface,
1987
signature="t",
1000
@dbus_service_property(_interface, signature="t",
1988
1001
access="readwrite")
1989
1002
def ApprovalDuration_dbus_property(self, value=None):
1990
1003
if value is None: # get
1991
return dbus.UInt64(self.approval_duration.total_seconds()
1992
* 1000)
1004
return dbus.UInt64(_timedelta_to_milliseconds(
1005
self.approval_duration))
1993
1006
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1994
1007
1995
1008
# Name - property
1996
@dbus_annotations(
1997
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1998
1009
@dbus_service_property(_interface, signature="s", access="read")
1999
1010
def Name_dbus_property(self):
2000
1011
return dbus.String(self.name)
2001
1012
2002
1013
# Fingerprint - property
2003
@dbus_annotations(
2004
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2005
1014
@dbus_service_property(_interface, signature="s", access="read")
2006
1015
def Fingerprint_dbus_property(self):
2007
1016
return dbus.String(self.fingerprint)
2008
1017
2009
1018
# Host - property
2010
@dbus_service_property(_interface,
2011
signature="s",
1019
@dbus_service_property(_interface, signature="s",
2012
1020
access="readwrite")
2013
1021
def Host_dbus_property(self, value=None):
2014
1022
if value is None: # get
2015
1023
return dbus.String(self.host)
2016
self.host = str(value)
2017
1024
self.host = value
1025
2018
1026
# Created - property
2019
@dbus_annotations(
2020
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2021
1027
@dbus_service_property(_interface, signature="s", access="read")
2022
1028
def Created_dbus_property(self):
2023
return datetime_to_dbus(self.created)
2024
1029
return dbus.String(datetime_to_dbus(self.created))
1030
2025
1031
# LastEnabled - property
2026
1032
@dbus_service_property(_interface, signature="s", access="read")
2027
1033
def LastEnabled_dbus_property(self):
2028
1034
return datetime_to_dbus(self.last_enabled)
2029
1035
2030
1036
# Enabled - property
2031
@dbus_service_property(_interface,
2032
signature="b",
1037
@dbus_service_property(_interface, signature="b",
2033
1038
access="readwrite")
2034
1039
def Enabled_dbus_property(self, value=None):
2035
1040
if value is None: # get
2038
1043
self.enable()
2039
1044
else:
2040
1045
self.disable()
2041
1046
2042
1047
# LastCheckedOK - property
2043
@dbus_service_property(_interface,
2044
signature="s",
1048
@dbus_service_property(_interface, signature="s",
2045
1049
access="readwrite")
2046
1050
def LastCheckedOK_dbus_property(self, value=None):
2047
1051
if value is not None:
2048
1052
self.checked_ok()
2049
1053
return
2050
1054
return datetime_to_dbus(self.last_checked_ok)
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
1055
2057
1056
# Expires - property
2058
1057
@dbus_service_property(_interface, signature="s", access="read")
2059
1058
def Expires_dbus_property(self):
2060
1059
return datetime_to_dbus(self.expires)
2061
1060
2062
1061
# LastApprovalRequest - property
2063
1062
@dbus_service_property(_interface, signature="s", access="read")
2064
1063
def LastApprovalRequest_dbus_property(self):
2065
1064
return datetime_to_dbus(self.last_approval_request)
2066
1065
2067
1066
# Timeout - property
2068
@dbus_service_property(_interface,
2069
signature="t",
1067
@dbus_service_property(_interface, signature="t",
2070
1068
access="readwrite")
2071
1069
def Timeout_dbus_property(self, value=None):
2072
1070
if value is None: # get
2073
return dbus.UInt64(self.timeout.total_seconds() * 1000)
2074
old_timeout = self.timeout
1071
return dbus.UInt64(self.timeout_milliseconds())
2075
1072
self.timeout = datetime.timedelta(0, 0, 0, value)
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)
1073
if getattr(self, "disable_initiator_tag", None) is None:
1074
return
1075
# Reschedule timeout
1076
gobject.source_remove(self.disable_initiator_tag)
1077
self.disable_initiator_tag = None
1078
self.expires = None
1079
time_to_die = (self.
1080
_timedelta_to_milliseconds((self
1081
.last_checked_ok
1082
+ self.timeout)
1083
- datetime.datetime
1084
.utcnow()))
1085
if time_to_die <= 0:
1086
# The timeout has passed
1087
self.disable()
1088
else:
1089
self.expires = (datetime.datetime.utcnow()
1090
+ datetime.timedelta(milliseconds = time_to_die))
1091
self.disable_initiator_tag = (gobject.timeout_add
1092
(time_to_die, self.disable))
2091
1093
2092
1094
# ExtendedTimeout - property
2093
@dbus_service_property(_interface,
2094
signature="t",
1095
@dbus_service_property(_interface, signature="t",
2095
1096
access="readwrite")
2096
1097
def ExtendedTimeout_dbus_property(self, value=None):
2097
1098
if value is None: # get
2098
return dbus.UInt64(self.extended_timeout.total_seconds()
2099
* 1000)
1099
return dbus.UInt64(self.extended_timeout_milliseconds())
2100
1100
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
2101
1101
2102
1102
# Interval - property
2103
@dbus_service_property(_interface,
2104
signature="t",
1103
@dbus_service_property(_interface, signature="t",
2105
1104
access="readwrite")
2106
1105
def Interval_dbus_property(self, value=None):
2107
1106
if value is None: # get
2108
return dbus.UInt64(self.interval.total_seconds() * 1000)
1107
return dbus.UInt64(self.interval_milliseconds())
2109
1108
self.interval = datetime.timedelta(0, 0, 0, value)
2110
1109
if getattr(self, "checker_initiator_tag", None) is None:
2111
1110
return
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
1111
# Reschedule checker run
1112
gobject.source_remove(self.checker_initiator_tag)
1113
self.checker_initiator_tag = (gobject.timeout_add
1114
(value, self.start_checker))
1115
self.start_checker() # Start one now, too
2118
1116
2119
1117
# Checker - property
2120
@dbus_service_property(_interface,
2121
signature="s",
1118
@dbus_service_property(_interface, signature="s",
2122
1119
access="readwrite")
2123
1120
def Checker_dbus_property(self, value=None):
2124
1121
if value is None: # get
2125
1122
return dbus.String(self.checker_command)
2126
self.checker_command = str(value)
2127
1123
self.checker_command = value
1124
2128
1125
# CheckerRunning - property
2129
@dbus_service_property(_interface,
2130
signature="b",
1126
@dbus_service_property(_interface, signature="b",
2131
1127
access="readwrite")
2132
1128
def CheckerRunning_dbus_property(self, value=None):
2133
1129
if value is None: # get
2136
1132
self.start_checker()
2137
1133
else:
2138
1134
self.stop_checker()
2139
1135
2140
1136
# ObjectPath - property
2141
@dbus_annotations(
2142
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
2143
"org.freedesktop.DBus.Deprecated": "true"})
2144
1137
@dbus_service_property(_interface, signature="o", access="read")
2145
1138
def ObjectPath_dbus_property(self):
2146
return self.dbus_object_path # is already a dbus.ObjectPath
2147
1139
return self.dbus_object_path # is already a dbus.ObjectPath
1140
2148
1141
# Secret = property
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)
1142
@dbus_service_property(_interface, signature="ay",
1143
access="write", byte_arrays=True)
2156
1144
def Secret_dbus_property(self, value):
2157
self.secret = bytes(value)
2158
1145
self.secret = str(value)
1146
2159
1147
del _interface
2160
1148
2161
1149
2164
1152
self._pipe = child_pipe
2165
1153
self._pipe.send(('init', fpr, address))
2166
1154
if not self._pipe.recv():
2167
raise KeyError(fpr)
1155
raise KeyError()
2168
1156
2169
1157
def __getattribute__(self, name):
2170
if name == '_pipe':
1158
if(name == '_pipe'):
2171
1159
return super(ProxyClient, self).__getattribute__(name)
2172
1160
self._pipe.send(('getattr', name))
2173
1161
data = self._pipe.recv()
2174
1162
if data[0] == 'data':
2175
1163
return data[1]
2176
1164
if data[0] == 'function':
2177
2178
1165
def func(*args, **kwargs):
2179
1166
self._pipe.send(('funcall', name, args, kwargs))
2180
1167
return self._pipe.recv()[1]
2181
2182
1168
return func
2183
1169
2184
1170
def __setattr__(self, name, value):
2185
if name == '_pipe':
1171
if(name == '_pipe'):
2186
1172
return super(ProxyClient, self).__setattr__(name, value)
2187
1173
self._pipe.send(('setattr', name, value))
2188
1174
2189
1175
2190
1176
class ClientHandler(socketserver.BaseRequestHandler, object):
2191
1177
"""A class to handle client connections.
2192
1178
2193
1179
Instantiated once for each connection to handle it.
2194
1180
Note: This will run in its own forked process."""
2195
1181
2196
1182
def handle(self):
2197
1183
with contextlib.closing(self.server.child_pipe) as child_pipe:
2198
1184
logger.info("TCP connection from: %s",
2199
str(self.client_address))
1185
unicode(self.client_address))
2200
1186
logger.debug("Pipe FD: %d",
2201
1187
self.server.child_pipe.fileno())
2202
1188
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"))
1189
session = (gnutls.connection
1190
.ClientSession(self.request,
1191
gnutls.connection
1192
.X509Credentials()))
1193
1194
# Note: gnutls.connection.X509Credentials is really a
1195
# generic GnuTLS certificate credentials object so long as
1196
# no X.509 keys are added to it. Therefore, we can use it
1197
# here despite using OpenPGP certificates.
1198
1199
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1200
# "+AES-256-CBC", "+SHA1",
1201
# "+COMP-NULL", "+CTYPE-OPENPGP",
1202
# "+DHE-DSS"))
2209
1203
# Use a fallback default, since this MUST be set.
2210
1204
priority = self.server.gnutls_priority
2211
1205
if priority is None:
2212
1206
priority = "NORMAL"
2213
gnutls.priority_set_direct(session._c_object,
2214
priority.encode("utf-8"),
2215
None)
1207
(gnutls.library.functions
1208
.gnutls_priority_set_direct(session._c_object,
1209
priority, None))
2216
1210
2217
1211
# Start communication using the Mandos protocol
2218
1212
# Get protocol number
2220
1214
logger.debug("Protocol version: %r", line)
2221
1215
try:
2222
1216
if int(line.strip().split()[0]) > 1:
2223
raise RuntimeError(line)
1217
raise RuntimeError
2224
1218
except (ValueError, IndexError, RuntimeError) as error:
2225
1219
logger.error("Unknown protocol version: %s", error)
2226
1220
return
2228
1222
# Start GnuTLS connection
2229
1223
try:
2230
1224
session.handshake()
2231
except gnutls.Error as error:
1225
except gnutls.errors.GNUTLSError as error:
2232
1226
logger.warning("Handshake failed: %s", error)
2233
1227
# Do not run session.bye() here: the session is not
2234
1228
# established. Just abandon the request.
2238
1232
approval_required = False
2239
1233
try:
2240
1234
try:
2241
fpr = self.fingerprint(
2242
self.peer_certificate(session))
2243
except (TypeError, gnutls.Error) as error:
1235
fpr = self.fingerprint(self.peer_certificate
1236
(session))
1237
except (TypeError,
1238
gnutls.errors.GNUTLSError) as error:
2244
1239
logger.warning("Bad certificate: %s", error)
2245
1240
return
2246
1241
logger.debug("Fingerprint: %s", fpr)
2250
1245
self.client_address)
2251
1246
except KeyError:
2252
1247
return
2253
1248
2254
1249
if client.approval_delay:
2255
1250
delay = client.approval_delay
2256
1251
client.approvals_pending += 1
2257
1252
approval_required = True
2258
1253
2259
1254
while True:
2260
1255
if not client.enabled:
2261
1256
logger.info("Client %s is disabled",
2262
client.name)
1257
client.name)
2263
1258
if self.server.use_dbus:
2264
1259
# Emit D-Bus signal
2265
client.Rejected("Disabled")
1260
client.Rejected("Disabled")
2266
1261
return
2267
2268
if client.approved or not client.approval_delay:
2269
# We are approved or approval is disabled
1262
1263
if client._approved or not client.approval_delay:
1264
#We are approved or approval is disabled
2270
1265
break
2271
elif client.approved is None:
1266
elif client._approved is None:
2272
1267
logger.info("Client %s needs approval",
2273
1268
client.name)
2274
1269
if self.server.use_dbus:
2275
1270
# Emit D-Bus signal
2276
1271
client.NeedApproval(
2277
client.approval_delay.total_seconds()
2278
* 1000, client.approved_by_default)
1272
client.approval_delay_milliseconds(),
1273
client.approved_by_default)
2279
1274
else:
2280
1275
logger.warning("Client %s was not approved",
2281
1276
client.name)
2283
1278
# Emit D-Bus signal
2284
1279
client.Rejected("Denied")
2285
1280
return
2286
2287
# wait until timeout or approved
1281
1282
#wait until timeout or approved
1283
#x = float(client._timedelta_to_milliseconds(delay))
2288
1284
time = datetime.datetime.now()
2289
1285
client.changedstate.acquire()
2290
client.changedstate.wait(delay.total_seconds())
1286
client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))
2291
1287
client.changedstate.release()
2292
1288
time2 = datetime.datetime.now()
2293
1289
if (time2 - time) >= delay:
2303
1299
break
2304
1300
else:
2305
1301
delay -= time2 - time
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
1302
1303
sent_size = 0
1304
while sent_size < len(client.secret):
1305
try:
1306
sent = session.send(client.secret[sent_size:])
1307
except gnutls.errors.GNUTLSError as error:
1308
logger.warning("gnutls send failed")
1309
return
1310
logger.debug("Sent: %d, remaining: %d",
1311
sent, len(client.secret)
1312
- (sent_size + sent))
1313
sent_size += sent
2313
1314
2314
1315
logger.info("Sending secret to %s", client.name)
2315
# bump the timeout using extended_timeout
2316
client.bump_timeout(client.extended_timeout)
1316
# bump the timeout as if seen
1317
client.checked_ok(client.extended_timeout)
2317
1318
if self.server.use_dbus:
2318
1319
# Emit D-Bus signal
2319
1320
client.GotSecret()
2320
1321
2321
1322
finally:
2322
1323
if approval_required:
2323
1324
client.approvals_pending -= 1
2324
1325
try:
2325
1326
session.bye()
2326
except gnutls.Error as error:
2327
logger.warning("GnuTLS bye failed",
2328
exc_info=error)
2329
1327
except gnutls.errors.GNUTLSError as error:
1328
logger.warning("GnuTLS bye failed")
1329
2330
1330
@staticmethod
2331
1331
def peer_certificate(session):
2332
1332
"Return the peer's OpenPGP certificate as a bytestring"
2333
1333
# If not an OpenPGP certificate...
2334
if (gnutls.certificate_type_get(session._c_object)
2335
!= gnutls.CRT_OPENPGP):
2336
# ...return invalid data
2337
return b""
1334
if (gnutls.library.functions
1335
.gnutls_certificate_type_get(session._c_object)
1336
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1337
# ...do the normal thing
1338
return session.peer_certificate
2338
1339
list_size = ctypes.c_uint(1)
2339
cert_list = (gnutls.certificate_get_peers
1340
cert_list = (gnutls.library.functions
1341
.gnutls_certificate_get_peers
2340
1342
(session._c_object, ctypes.byref(list_size)))
2341
1343
if not bool(cert_list) and list_size.value != 0:
2342
raise gnutls.Error("error getting peer certificate")
1344
raise gnutls.errors.GNUTLSError("error getting peer"
1345
" certificate")
2343
1346
if list_size.value == 0:
2344
1347
return None
2345
1348
cert = cert_list[0]
2346
1349
return ctypes.string_at(cert.data, cert.size)
2347
1350
2348
1351
@staticmethod
2349
1352
def fingerprint(openpgp):
2350
1353
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
2351
1354
# New GnuTLS "datum" with the OpenPGP public key
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)))
1355
datum = (gnutls.library.types
1356
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1357
ctypes.POINTER
1358
(ctypes.c_ubyte)),
1359
ctypes.c_uint(len(openpgp))))
2356
1360
# New empty GnuTLS certificate
2357
crt = gnutls.openpgp_crt_t()
2358
gnutls.openpgp_crt_init(ctypes.byref(crt))
1361
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1362
(gnutls.library.functions
1363
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
2359
1364
# Import the OpenPGP public key into the certificate
2360
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2361
gnutls.OPENPGP_FMT_RAW)
1365
(gnutls.library.functions
1366
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1367
gnutls.library.constants
1368
.GNUTLS_OPENPGP_FMT_RAW))
2362
1369
# Verify the self signature in the key
2363
1370
crtverify = ctypes.c_uint()
2364
gnutls.openpgp_crt_verify_self(crt, 0,
2365
ctypes.byref(crtverify))
1371
(gnutls.library.functions
1372
.gnutls_openpgp_crt_verify_self(crt, 0,
1373
ctypes.byref(crtverify)))
2366
1374
if crtverify.value != 0:
2367
gnutls.openpgp_crt_deinit(crt)
2368
raise gnutls.CertificateSecurityError("Verify failed")
1375
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1376
raise (gnutls.errors.CertificateSecurityError
1377
("Verify failed"))
2369
1378
# New buffer for the fingerprint
2370
1379
buf = ctypes.create_string_buffer(20)
2371
1380
buf_len = ctypes.c_size_t()
2372
1381
# Get the fingerprint from the certificate into the buffer
2373
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2374
ctypes.byref(buf_len))
1382
(gnutls.library.functions
1383
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1384
ctypes.byref(buf_len)))
2375
1385
# Deinit the certificate
2376
gnutls.openpgp_crt_deinit(crt)
1386
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2377
1387
# Convert the buffer to a Python bytestring
2378
1388
fpr = ctypes.string_at(buf, buf_len.value)
2379
1389
# Convert the bytestring to hexadecimal notation
2380
hex_fpr = binascii.hexlify(fpr).upper()
1390
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
2381
1391
return hex_fpr
2382
1392
2383
1393
2384
1394
class MultiprocessingMixIn(object):
2385
1395
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2386
2387
1396
def sub_process_main(self, request, address):
2388
1397
try:
2389
1398
self.finish_request(request, address)
2390
except Exception:
1399
except:
2391
1400
self.handle_error(request, address)
2392
1401
self.close_request(request)
2393
1402
2394
1403
def process_request(self, request, address):
2395
1404
"""Start a new process to process the request."""
2396
proc = multiprocessing.Process(target=self.sub_process_main,
2397
args=(request, address))
2398
proc.start()
2399
return proc
2400
1405
multiprocessing.Process(target = self.sub_process_main,
1406
args = (request, address)).start()
2401
1407
2402
1408
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
2403
1409
""" adds a pipe to the MixIn """
2404
2405
1410
def process_request(self, request, client_address):
2406
1411
"""Overrides and wraps the original process_request().
2407
1412
2408
1413
This function creates a new pipe in self.pipe
2409
1414
"""
2410
1415
parent_pipe, self.child_pipe = multiprocessing.Pipe()
2411
1416
2412
proc = MultiprocessingMixIn.process_request(self, request,
2413
client_address)
1417
super(MultiprocessingMixInWithPipe,
1418
self).process_request(request, client_address)
2414
1419
self.child_pipe.close()
2415
self.add_pipe(parent_pipe, proc)
1420
self.add_pipe(parent_pipe)
2416
1421
2417
def add_pipe(self, parent_pipe, proc):
1422
def add_pipe(self, parent_pipe):
2418
1423
"""Dummy function; override as necessary"""
2419
raise NotImplementedError()
2420
1424
raise NotImplementedError
2421
1425
2422
1426
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
2423
1427
socketserver.TCPServer, object):
2424
1428
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
2425
1429
2426
1430
Attributes:
2427
1431
enabled: Boolean; whether this server is activated yet
2428
1432
interface: None or a network interface name (string)
2429
1433
use_ipv6: Boolean; to use IPv6 or not
2430
1434
"""
2431
2432
1435
def __init__(self, server_address, RequestHandlerClass,
2433
interface=None,
2434
use_ipv6=True,
2435
socketfd=None):
2436
"""If socketfd is set, use that file descriptor instead of
2437
creating a new one with socket.socket().
2438
"""
1436
interface=None, use_ipv6=True):
2439
1437
self.interface = interface
2440
1438
if use_ipv6:
2441
1439
self.address_family = socket.AF_INET6
2442
if socketfd is not None:
2443
# Save the file descriptor
2444
self.socketfd = socketfd
2445
# Save the original socket.socket() function
2446
self.socket_socket = socket.socket
2447
2448
# To implement --socket, we monkey patch socket.socket.
2449
#
2450
# (When socketserver.TCPServer is a new-style class, we
2451
# could make self.socket into a property instead of monkey
2452
# patching socket.socket.)
2453
#
2454
# Create a one-time-only replacement for socket.socket()
2455
@functools.wraps(socket.socket)
2456
def socket_wrapper(*args, **kwargs):
2457
# Restore original function so subsequent calls are
2458
# not affected.
2459
socket.socket = self.socket_socket
2460
del self.socket_socket
2461
# This time only, return a new socket object from the
2462
# saved file descriptor.
2463
return socket.fromfd(self.socketfd, *args, **kwargs)
2464
# Replace socket.socket() function with wrapper
2465
socket.socket = socket_wrapper
2466
# The socketserver.TCPServer.__init__ will call
2467
# socket.socket(), which might be our replacement,
2468
# socket_wrapper(), if socketfd was set.
2469
1440
socketserver.TCPServer.__init__(self, server_address,
2470
1441
RequestHandlerClass)
2471
2472
1442
def server_bind(self):
2473
1443
"""This overrides the normal server_bind() function
2474
1444
to bind to an interface if one was specified, and also NOT to
2475
1445
bind to an address or port if they were not specified."""
2476
global SO_BINDTODEVICE
2477
1446
if self.interface is not None:
2478
1447
if SO_BINDTODEVICE is None:
2479
# Fall back to a hard-coded value which seems to be
2480
# common enough.
2481
logger.warning("SO_BINDTODEVICE not found, trying 25")
2482
SO_BINDTODEVICE = 25
2483
try:
2484
self.socket.setsockopt(
2485
socket.SOL_SOCKET, SO_BINDTODEVICE,
2486
(self.interface + "\0").encode("utf-8"))
2487
except socket.error as error:
2488
if error.errno == errno.EPERM:
2489
logger.error("No permission to bind to"
2490
" interface %s", self.interface)
2491
elif error.errno == errno.ENOPROTOOPT:
2492
logger.error("SO_BINDTODEVICE not available;"
2493
" cannot bind to interface %s",
2494
self.interface)
2495
elif error.errno == errno.ENODEV:
2496
logger.error("Interface %s does not exist,"
2497
" cannot bind", self.interface)
2498
else:
2499
raise
1448
logger.error("SO_BINDTODEVICE does not exist;"
1449
" cannot bind to interface %s",
1450
self.interface)
1451
else:
1452
try:
1453
self.socket.setsockopt(socket.SOL_SOCKET,
1454
SO_BINDTODEVICE,
1455
str(self.interface
1456
+ '\0'))
1457
except socket.error as error:
1458
if error[0] == errno.EPERM:
1459
logger.error("No permission to"
1460
" bind to interface %s",
1461
self.interface)
1462
elif error[0] == errno.ENOPROTOOPT:
1463
logger.error("SO_BINDTODEVICE not available;"
1464
" cannot bind to interface %s",
1465
self.interface)
1466
else:
1467
raise
2500
1468
# Only bind(2) the socket if we really need to.
2501
1469
if self.server_address[0] or self.server_address[1]:
2502
1470
if not self.server_address[0]:
2503
1471
if self.address_family == socket.AF_INET6:
2504
any_address = "::" # in6addr_any
1472
any_address = "::" # in6addr_any
2505
1473
else:
2506
any_address = "0.0.0.0" # INADDR_ANY
1474
any_address = socket.INADDR_ANY
2507
1475
self.server_address = (any_address,
2508
1476
self.server_address[1])
2509
1477
elif not self.server_address[1]:
2510
self.server_address = (self.server_address[0], 0)
1478
self.server_address = (self.server_address[0],
1479
0)
2511
1480
# if self.interface:
2512
1481
# self.server_address = (self.server_address[0],
2513
1482
# 0, # port
2519
1488
2520
1489
class MandosServer(IPv6_TCPServer):
2521
1490
"""Mandos server.
2522
1491
2523
1492
Attributes:
2524
1493
clients: set of Client objects
2525
1494
gnutls_priority GnuTLS priority string
2526
1495
use_dbus: Boolean; to emit D-Bus signals or not
2527
2528
Assumes a GLib.MainLoop event loop.
1496
1497
Assumes a gobject.MainLoop event loop.
2529
1498
"""
2530
2531
1499
def __init__(self, server_address, RequestHandlerClass,
2532
interface=None,
2533
use_ipv6=True,
2534
clients=None,
2535
gnutls_priority=None,
2536
use_dbus=True,
2537
socketfd=None):
1500
interface=None, use_ipv6=True, clients=None,
1501
gnutls_priority=None, use_dbus=True):
2538
1502
self.enabled = False
2539
1503
self.clients = clients
2540
1504
if self.clients is None:
2541
self.clients = {}
1505
self.clients = set()
2542
1506
self.use_dbus = use_dbus
2543
1507
self.gnutls_priority = gnutls_priority
2544
1508
IPv6_TCPServer.__init__(self, server_address,
2545
1509
RequestHandlerClass,
2546
interface=interface,
2547
use_ipv6=use_ipv6,
2548
socketfd=socketfd)
2549
1510
interface = interface,
1511
use_ipv6 = use_ipv6)
2550
1512
def server_activate(self):
2551
1513
if self.enabled:
2552
1514
return socketserver.TCPServer.server_activate(self)
2553
2554
1515
def enable(self):
2555
1516
self.enabled = True
2556
2557
def add_pipe(self, parent_pipe, proc):
1517
def add_pipe(self, parent_pipe):
2558
1518
# Call "handle_ipc" for both data and EOF events
2559
GLib.io_add_watch(
2560
parent_pipe.fileno(),
2561
GLib.IO_IN | GLib.IO_HUP,
2562
functools.partial(self.handle_ipc,
2563
parent_pipe=parent_pipe,
2564
proc=proc))
2565
2566
def handle_ipc(self, source, condition,
2567
parent_pipe=None,
2568
proc=None,
1519
gobject.io_add_watch(parent_pipe.fileno(),
1520
gobject.IO_IN | gobject.IO_HUP,
1521
functools.partial(self.handle_ipc,
1522
parent_pipe = parent_pipe))
1523
1524
def handle_ipc(self, source, condition, parent_pipe=None,
2569
1525
client_object=None):
2570
# error, or the other end of multiprocessing.Pipe has closed
2571
if condition & (GLib.IO_ERR | GLib.IO_HUP):
2572
# Wait for other process to exit
2573
proc.join()
1526
condition_names = {
1527
gobject.IO_IN: "IN", # There is data to read.
1528
gobject.IO_OUT: "OUT", # Data can be written (without
1529
# blocking).
1530
gobject.IO_PRI: "PRI", # There is urgent data to read.
1531
gobject.IO_ERR: "ERR", # Error condition.
1532
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1533
# broken, usually for pipes and
1534
# sockets).
1535
}
1536
conditions_string = ' | '.join(name
1537
for cond, name in
1538
condition_names.iteritems()
1539
if cond & condition)
1540
# error or the other end of multiprocessing.Pipe has closed
1541
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
2574
1542
return False
2575
1543
2576
1544
# Read a request from the child
2577
1545
request = parent_pipe.recv()
2578
1546
command = request[0]
2579
1547
2580
1548
if command == 'init':
2581
1549
fpr = request[1]
2582
1550
address = request[2]
2583
2584
for c in self.clients.values():
1551
1552
for c in self.clients:
2585
1553
if c.fingerprint == fpr:
2586
1554
client = c
2587
1555
break
2590
1558
"dress: %s", fpr, address)
2591
1559
if self.use_dbus:
2592
1560
# Emit D-Bus signal
2593
mandos_dbus_service.ClientNotFound(fpr,
2594
address[0])
1561
mandos_dbus_service.ClientNotFound(fpr, address[0])
2595
1562
parent_pipe.send(False)
2596
1563
return False
2597
2598
GLib.io_add_watch(
2599
parent_pipe.fileno(),
2600
GLib.IO_IN | GLib.IO_HUP,
2601
functools.partial(self.handle_ipc,
2602
parent_pipe=parent_pipe,
2603
proc=proc,
2604
client_object=client))
1564
1565
gobject.io_add_watch(parent_pipe.fileno(),
1566
gobject.IO_IN | gobject.IO_HUP,
1567
functools.partial(self.handle_ipc,
1568
parent_pipe = parent_pipe,
1569
client_object = client))
2605
1570
parent_pipe.send(True)
2606
# remove the old hook in favor of the new above hook on
2607
# same fileno
1571
# remove the old hook in favor of the new above hook on same fileno
2608
1572
return False
2609
1573
if command == 'funcall':
2610
1574
funcname = request[1]
2611
1575
args = request[2]
2612
1576
kwargs = request[3]
2613
2614
parent_pipe.send(('data', getattr(client_object,
2615
funcname)(*args,
2616
**kwargs)))
1577
1578
parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))
2617
1579
2618
1580
if command == 'getattr':
2619
1581
attrname = request[1]
2620
if isinstance(client_object.__getattribute__(attrname),
2621
collections.Callable):
2622
parent_pipe.send(('function', ))
1582
if callable(client_object.__getattribute__(attrname)):
1583
parent_pipe.send(('function',))
2623
1584
else:
2624
parent_pipe.send((
2625
'data', client_object.__getattribute__(attrname)))
2626
1585
parent_pipe.send(('data', client_object.__getattribute__(attrname)))
1586
2627
1587
if command == 'setattr':
2628
1588
attrname = request[1]
2629
1589
value = request[2]
2632
1592
return True
2633
1593
2634
1594
2635
def rfc3339_duration_to_delta(duration):
2636
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2637
2638
>>> rfc3339_duration_to_delta("P7D")
2639
datetime.timedelta(7)
2640
>>> rfc3339_duration_to_delta("PT60S")
2641
datetime.timedelta(0, 60)
2642
>>> rfc3339_duration_to_delta("PT60M")
2643
datetime.timedelta(0, 3600)
2644
>>> rfc3339_duration_to_delta("PT24H")
2645
datetime.timedelta(1)
2646
>>> rfc3339_duration_to_delta("P1W")
2647
datetime.timedelta(7)
2648
>>> rfc3339_duration_to_delta("PT5M30S")
2649
datetime.timedelta(0, 330)
2650
>>> rfc3339_duration_to_delta("P1DT3M20S")
2651
datetime.timedelta(1, 200)
2652
"""
2653
2654
# Parsing an RFC 3339 duration with regular expressions is not
2655
# possible - there would have to be multiple places for the same
2656
# values, like seconds. The current code, while more esoteric, is
2657
# cleaner without depending on a parsing library. If Python had a
2658
# built-in library for parsing we would use it, but we'd like to
2659
# avoid excessive use of external libraries.
2660
2661
# New type for defining tokens, syntax, and semantics all-in-one
2662
Token = collections.namedtuple("Token", (
2663
"regexp", # To match token; if "value" is not None, must have
2664
# a "group" containing digits
2665
"value", # datetime.timedelta or None
2666
"followers")) # Tokens valid after this token
2667
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2668
# the "duration" ABNF definition in RFC 3339, Appendix A.
2669
token_end = Token(re.compile(r"$"), None, frozenset())
2670
token_second = Token(re.compile(r"(\d+)S"),
2671
datetime.timedelta(seconds=1),
2672
frozenset((token_end, )))
2673
token_minute = Token(re.compile(r"(\d+)M"),
2674
datetime.timedelta(minutes=1),
2675
frozenset((token_second, token_end)))
2676
token_hour = Token(re.compile(r"(\d+)H"),
2677
datetime.timedelta(hours=1),
2678
frozenset((token_minute, token_end)))
2679
token_time = Token(re.compile(r"T"),
2680
None,
2681
frozenset((token_hour, token_minute,
2682
token_second)))
2683
token_day = Token(re.compile(r"(\d+)D"),
2684
datetime.timedelta(days=1),
2685
frozenset((token_time, token_end)))
2686
token_month = Token(re.compile(r"(\d+)M"),
2687
datetime.timedelta(weeks=4),
2688
frozenset((token_day, token_end)))
2689
token_year = Token(re.compile(r"(\d+)Y"),
2690
datetime.timedelta(weeks=52),
2691
frozenset((token_month, token_end)))
2692
token_week = Token(re.compile(r"(\d+)W"),
2693
datetime.timedelta(weeks=1),
2694
frozenset((token_end, )))
2695
token_duration = Token(re.compile(r"P"), None,
2696
frozenset((token_year, token_month,
2697
token_day, token_time,
2698
token_week)))
2699
# Define starting values:
2700
# Value so far
2701
value = datetime.timedelta()
2702
found_token = None
2703
# Following valid tokens
2704
followers = frozenset((token_duration, ))
2705
# String left to parse
2706
s = duration
2707
# Loop until end token is found
2708
while found_token is not token_end:
2709
# Search for any currently valid tokens
2710
for token in followers:
2711
match = token.regexp.match(s)
2712
if match is not None:
2713
# Token found
2714
if token.value is not None:
2715
# Value found, parse digits
2716
factor = int(match.group(1), 10)
2717
# Add to value so far
2718
value += factor * token.value
2719
# Strip token from string
2720
s = token.regexp.sub("", s, 1)
2721
# Go to found token
2722
found_token = token
2723
# Set valid next tokens
2724
followers = found_token.followers
2725
break
2726
else:
2727
# No currently valid tokens were found
2728
raise ValueError("Invalid RFC 3339 duration: {!r}"
2729
.format(duration))
2730
# End token found
2731
return value
2732
2733
2734
1595
def string_to_delta(interval):
2735
1596
"""Parse a string and return a datetime.timedelta
2736
1597
2737
1598
>>> string_to_delta('7d')
2738
1599
datetime.timedelta(7)
2739
1600
>>> string_to_delta('60s')
2747
1608
>>> string_to_delta('5m 30s')
2748
1609
datetime.timedelta(0, 330)
2749
1610
"""
2750
2751
try:
2752
return rfc3339_duration_to_delta(interval)
2753
except ValueError:
2754
pass
2755
2756
1611
timevalue = datetime.timedelta(0)
2757
1612
for s in interval.split():
2758
1613
try:
2759
suffix = s[-1]
1614
suffix = unicode(s[-1])
2760
1615
value = int(s[:-1])
2761
1616
if suffix == "d":
2762
1617
delta = datetime.timedelta(value)
2769
1624
elif suffix == "w":
2770
1625
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
2771
1626
else:
2772
raise ValueError("Unknown suffix {!r}".format(suffix))
2773
except IndexError as e:
1627
raise ValueError("Unknown suffix %r" % suffix)
1628
except (ValueError, IndexError) as e:
2774
1629
raise ValueError(*(e.args))
2775
1630
timevalue += delta
2776
1631
return timevalue
2777
1632
2778
1633
2779
def daemon(nochdir=False, noclose=False):
1634
def if_nametoindex(interface):
1635
"""Call the C function if_nametoindex(), or equivalent
1636
1637
Note: This function cannot accept a unicode string."""
1638
global if_nametoindex
1639
try:
1640
if_nametoindex = (ctypes.cdll.LoadLibrary
1641
(ctypes.util.find_library("c"))
1642
.if_nametoindex)
1643
except (OSError, AttributeError):
1644
logger.warning("Doing if_nametoindex the hard way")
1645
def if_nametoindex(interface):
1646
"Get an interface index the hard way, i.e. using fcntl()"
1647
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1648
with contextlib.closing(socket.socket()) as s:
1649
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1650
struct.pack(str("16s16x"),
1651
interface))
1652
interface_index = struct.unpack(str("I"),
1653
ifreq[16:20])[0]
1654
return interface_index
1655
return if_nametoindex(interface)
1656
1657
1658
def daemon(nochdir = False, noclose = False):
2780
1659
"""See daemon(3). Standard BSD Unix function.
2781
1660
2782
1661
This should really exist as os.daemon, but it doesn't (yet)."""
2783
1662
if os.fork():
2784
1663
sys.exit()
2789
1668
sys.exit()
2790
1669
if not noclose:
2791
1670
# Close all standard open file descriptors
2792
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1671
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2793
1672
if not stat.S_ISCHR(os.fstat(null).st_mode):
2794
1673
raise OSError(errno.ENODEV,
2795
"{} not a character device"
2796
.format(os.devnull))
1674
"%s not a character device"
1675
% os.path.devnull)
2797
1676
os.dup2(null, sys.stdin.fileno())
2798
1677
os.dup2(null, sys.stdout.fileno())
2799
1678
os.dup2(null, sys.stderr.fileno())
2802
1681
2803
1682
2804
1683
def main():
2805
1684
2806
1685
##################################################################
2807
1686
# Parsing of options, both command line and config file
2808
1687
2809
1688
parser = argparse.ArgumentParser()
2810
1689
parser.add_argument("-v", "--version", action="version",
2811
version="%(prog)s {}".format(version),
1690
version = "%%(prog)s %s" % version,
2812
1691
help="show version number and exit")
2813
1692
parser.add_argument("-i", "--interface", metavar="IF",
2814
1693
help="Bind to interface IF")
2820
1699
help="Run self-test")
2821
1700
parser.add_argument("--debug", action="store_true",
2822
1701
help="Debug mode; run in foreground and log"
2823
" to terminal", default=None)
1702
" to terminal")
2824
1703
parser.add_argument("--debuglevel", metavar="LEVEL",
2825
1704
help="Debug level for stdout output")
2826
1705
parser.add_argument("--priority", help="GnuTLS"
2833
1712
" files")
2834
1713
parser.add_argument("--no-dbus", action="store_false",
2835
1714
dest="use_dbus", help="Do not provide D-Bus"
2836
" system bus interface", default=None)
1715
" system bus interface")
2837
1716
parser.add_argument("--no-ipv6", action="store_false",
2838
dest="use_ipv6", help="Do not use IPv6",
2839
default=None)
2840
parser.add_argument("--no-restore", action="store_false",
2841
dest="restore", help="Do not restore stored"
2842
" state", default=None)
2843
parser.add_argument("--socket", type=int,
2844
help="Specify a file descriptor to a network"
2845
" socket to use instead of creating one")
2846
parser.add_argument("--statedir", metavar="DIR",
2847
help="Directory to save/restore state in")
2848
parser.add_argument("--foreground", action="store_true",
2849
help="Run in foreground", default=None)
2850
parser.add_argument("--no-zeroconf", action="store_false",
2851
dest="zeroconf", help="Do not use Zeroconf",
2852
default=None)
2853
1717
dest="use_ipv6", help="Do not use IPv6")
2854
1718
options = parser.parse_args()
2855
1719
2856
1720
if options.check:
2857
1721
import doctest
2858
fail_count, test_count = doctest.testmod()
2859
sys.exit(os.EX_OK if fail_count == 0 else 1)
2860
1722
doctest.testmod()
1723
sys.exit()
1724
2861
1725
# Default values for config file for server-global settings
2862
server_defaults = {"interface": "",
2863
"address": "",
2864
"port": "",
2865
"debug": "False",
2866
"priority":
2867
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2868
":+SIGN-DSA-SHA256",
2869
"servicename": "Mandos",
2870
"use_dbus": "True",
2871
"use_ipv6": "True",
2872
"debuglevel": "",
2873
"restore": "True",
2874
"socket": "",
2875
"statedir": "/var/lib/mandos",
2876
"foreground": "False",
2877
"zeroconf": "True",
2878
}
2879
1726
server_defaults = { "interface": "",
1727
"address": "",
1728
"port": "",
1729
"debug": "False",
1730
"priority":
1731
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1732
"servicename": "Mandos",
1733
"use_dbus": "True",
1734
"use_ipv6": "True",
1735
"debuglevel": "",
1736
}
1737
2880
1738
# Parse config file for server-global settings
2881
1739
server_config = configparser.SafeConfigParser(server_defaults)
2882
1740
del server_defaults
2883
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1741
server_config.read(os.path.join(options.configdir,
1742
"mandos.conf"))
2884
1743
# Convert the SafeConfigParser object to a dict
2885
1744
server_settings = server_config.defaults()
2886
1745
# Use the appropriate methods on the non-string config options
2887
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2888
"foreground", "zeroconf"):
1746
for option in ("debug", "use_dbus", "use_ipv6"):
2889
1747
server_settings[option] = server_config.getboolean("DEFAULT",
2890
1748
option)
2891
1749
if server_settings["port"]:
2892
1750
server_settings["port"] = server_config.getint("DEFAULT",
2893
1751
"port")
2894
if server_settings["socket"]:
2895
server_settings["socket"] = server_config.getint("DEFAULT",
2896
"socket")
2897
# Later, stdin will, and stdout and stderr might, be dup'ed
2898
# over with an opened os.devnull. But we don't want this to
2899
# happen with a supplied network socket.
2900
if 0 <= server_settings["socket"] <= 2:
2901
server_settings["socket"] = os.dup(server_settings
2902
["socket"])
2903
1752
del server_config
2904
1753
2905
1754
# Override the settings from the config file with command line
2906
1755
# options, if set.
2907
1756
for option in ("interface", "address", "port", "debug",
2908
"priority", "servicename", "configdir", "use_dbus",
2909
"use_ipv6", "debuglevel", "restore", "statedir",
2910
"socket", "foreground", "zeroconf"):
1757
"priority", "servicename", "configdir",
1758
"use_dbus", "use_ipv6", "debuglevel"):
2911
1759
value = getattr(options, option)
2912
1760
if value is not None:
2913
1761
server_settings[option] = value
2914
1762
del options
2915
1763
# Force all strings to be unicode
2916
1764
for option in server_settings.keys():
2917
if isinstance(server_settings[option], bytes):
2918
server_settings[option] = (server_settings[option]
2919
.decode("utf-8"))
2920
# Force all boolean options to be boolean
2921
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2922
"foreground", "zeroconf"):
2923
server_settings[option] = bool(server_settings[option])
2924
# Debug implies foreground
2925
if server_settings["debug"]:
2926
server_settings["foreground"] = True
1765
if type(server_settings[option]) is str:
1766
server_settings[option] = unicode(server_settings[option])
2927
1767
# Now we have our good server settings in "server_settings"
2928
1768
2929
1769
##################################################################
2930
2931
if (not server_settings["zeroconf"]
2932
and not (server_settings["port"]
2933
or server_settings["socket"] != "")):
2934
parser.error("Needs port or socket to work without Zeroconf")
2935
1770
2936
1771
# For convenience
2937
1772
debug = server_settings["debug"]
2938
1773
debuglevel = server_settings["debuglevel"]
2939
1774
use_dbus = server_settings["use_dbus"]
2940
1775
use_ipv6 = server_settings["use_ipv6"]
2941
stored_state_path = os.path.join(server_settings["statedir"],
2942
stored_state_file)
2943
foreground = server_settings["foreground"]
2944
zeroconf = server_settings["zeroconf"]
2945
2946
if debug:
2947
initlogger(debug, logging.DEBUG)
2948
else:
2949
if not debuglevel:
2950
initlogger(debug)
2951
else:
2952
level = getattr(logging, debuglevel.upper())
2953
initlogger(debug, level)
2954
1776
2955
1777
if server_settings["servicename"] != "Mandos":
2956
syslogger.setFormatter(
2957
logging.Formatter('Mandos ({}) [%(process)d]:'
2958
' %(levelname)s: %(message)s'.format(
2959
server_settings["servicename"])))
2960
1778
syslogger.setFormatter(logging.Formatter
1779
('Mandos (%s) [%%(process)d]:'
1780
' %%(levelname)s: %%(message)s'
1781
% server_settings["servicename"]))
1782
2961
1783
# Parse config file with clients
2962
client_config = configparser.SafeConfigParser(Client
2963
.client_defaults)
1784
client_defaults = { "timeout": "5m",
1785
"extended_timeout": "15m",
1786
"interval": "2m",
1787
"checker": "fping -q -- %%(host)s",
1788
"host": "",
1789
"approval_delay": "0s",
1790
"approval_duration": "1s",
1791
}
1792
client_config = configparser.SafeConfigParser(client_defaults)
2964
1793
client_config.read(os.path.join(server_settings["configdir"],
2965
1794
"clients.conf"))
2966
1795
2967
1796
global mandos_dbus_service
2968
1797
mandos_dbus_service = None
2969
2970
socketfd = None
2971
if server_settings["socket"] != "":
2972
socketfd = server_settings["socket"]
2973
tcp_server = MandosServer(
2974
(server_settings["address"], server_settings["port"]),
2975
ClientHandler,
2976
interface=(server_settings["interface"] or None),
2977
use_ipv6=use_ipv6,
2978
gnutls_priority=server_settings["priority"],
2979
use_dbus=use_dbus,
2980
socketfd=socketfd)
2981
if not foreground:
2982
pidfilename = "/run/mandos.pid"
2983
if not os.path.isdir("/run/."):
2984
pidfilename = "/var/run/mandos.pid"
2985
pidfile = None
2986
try:
2987
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
2988
except IOError as e:
2989
logger.error("Could not open file %r", pidfilename,
2990
exc_info=e)
2991
2992
for name, group in (("_mandos", "_mandos"),
2993
("mandos", "mandos"),
2994
("nobody", "nogroup")):
2995
try:
2996
uid = pwd.getpwnam(name).pw_uid
2997
gid = pwd.getpwnam(group).pw_gid
2998
break
1798
1799
tcp_server = MandosServer((server_settings["address"],
1800
server_settings["port"]),
1801
ClientHandler,
1802
interface=(server_settings["interface"]
1803
or None),
1804
use_ipv6=use_ipv6,
1805
gnutls_priority=
1806
server_settings["priority"],
1807
use_dbus=use_dbus)
1808
if not debug:
1809
pidfilename = "/var/run/mandos.pid"
1810
try:
1811
pidfile = open(pidfilename, "w")
1812
except IOError:
1813
logger.error("Could not open file %r", pidfilename)
1814
1815
try:
1816
uid = pwd.getpwnam("_mandos").pw_uid
1817
gid = pwd.getpwnam("_mandos").pw_gid
1818
except KeyError:
1819
try:
1820
uid = pwd.getpwnam("mandos").pw_uid
1821
gid = pwd.getpwnam("mandos").pw_gid
2999
1822
except KeyError:
3000
continue
3001
else:
3002
uid = 65534
3003
gid = 65534
1823
try:
1824
uid = pwd.getpwnam("nobody").pw_uid
1825
gid = pwd.getpwnam("nobody").pw_gid
1826
except KeyError:
1827
uid = 65534
1828
gid = 65534
3004
1829
try:
3005
1830
os.setgid(gid)
3006
1831
os.setuid(uid)
3007
if debug:
3008
logger.debug("Did setuid/setgid to {}:{}".format(uid,
3009
gid))
3010
1832
except OSError as error:
3011
logger.warning("Failed to setuid/setgid to {}:{}: {}"
3012
.format(uid, gid, os.strerror(error.errno)))
3013
if error.errno != errno.EPERM:
3014
raise
1833
if error[0] != errno.EPERM:
1834
raise error
1835
1836
if not debug and not debuglevel:
1837
syslogger.setLevel(logging.WARNING)
1838
console.setLevel(logging.WARNING)
1839
if debuglevel:
1840
level = getattr(logging, debuglevel.upper())
1841
syslogger.setLevel(level)
1842
console.setLevel(level)
3015
1843
3016
1844
if debug:
3017
1845
# Enable all possible GnuTLS debugging
3018
1846
3019
1847
# "Use a log level over 10 to enable all debugging options."
3020
1848
# - GnuTLS manual
3021
gnutls.global_set_log_level(11)
3022
3023
@gnutls.log_func
1849
gnutls.library.functions.gnutls_global_set_log_level(11)
1850
1851
@gnutls.library.types.gnutls_log_func
3024
1852
def debug_gnutls(level, string):
3025
1853
logger.debug("GnuTLS: %s", string[:-1])
3026
3027
gnutls.global_set_log_function(debug_gnutls)
3028
1854
1855
(gnutls.library.functions
1856
.gnutls_global_set_log_function(debug_gnutls))
1857
3029
1858
# Redirect stdin so all checkers get /dev/null
3030
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1859
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
3031
1860
os.dup2(null, sys.stdin.fileno())
3032
1861
if null > 2:
3033
1862
os.close(null)
3034
1863
else:
1864
# No console logging
1865
logger.removeHandler(console)
1866
3035
1867
# Need to fork before connecting to D-Bus
3036
if not foreground:
1868
if not debug:
3037
1869
# Close all input and output, do double fork, etc.
3038
1870
daemon()
3039
3040
# multiprocessing will use threads, so before we use GLib we need
3041
# to inform GLib that threads will be used.
3042
GLib.threads_init()
3043
1871
3044
1872
global main_loop
3045
1873
# From the Avahi example code
3046
DBusGMainLoop(set_as_default=True)
3047
main_loop = GLib.MainLoop()
1874
DBusGMainLoop(set_as_default=True )
1875
main_loop = gobject.MainLoop()
3048
1876
bus = dbus.SystemBus()
3049
1877
# End of Avahi example code
3050
1878
if use_dbus:
3051
1879
try:
3052
bus_name = dbus.service.BusName("se.recompile.Mandos",
3053
bus,
3054
do_not_queue=True)
3055
old_bus_name = dbus.service.BusName(
3056
"se.bsnet.fukt.Mandos", bus,
3057
do_not_queue=True)
3058
except dbus.exceptions.DBusException as e:
3059
logger.error("Disabling D-Bus:", exc_info=e)
1880
bus_name = dbus.service.BusName("se.bsnet.fukt.Mandos",
1881
bus, do_not_queue=True)
1882
except dbus.exceptions.NameExistsException as e:
1883
logger.error(unicode(e) + ", disabling D-Bus")
3060
1884
use_dbus = False
3061
1885
server_settings["use_dbus"] = False
3062
1886
tcp_server.use_dbus = False
3063
if zeroconf:
3064
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3065
service = AvahiServiceToSyslog(
3066
name=server_settings["servicename"],
3067
servicetype="_mandos._tcp",
3068
protocol=protocol,
3069
bus=bus)
3070
if server_settings["interface"]:
3071
service.interface = if_nametoindex(
3072
server_settings["interface"].encode("utf-8"))
3073
1887
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1888
service = AvahiService(name = server_settings["servicename"],
1889
servicetype = "_mandos._tcp",
1890
protocol = protocol, bus = bus)
1891
if server_settings["interface"]:
1892
service.interface = (if_nametoindex
1893
(str(server_settings["interface"])))
1894
3074
1895
global multiprocessing_manager
3075
1896
multiprocessing_manager = multiprocessing.Manager()
3076
1897
3077
1898
client_class = Client
3078
1899
if use_dbus:
3079
client_class = functools.partial(ClientDBus, bus=bus)
3080
3081
client_settings = Client.config_parser(client_config)
3082
old_client_settings = {}
3083
clients_data = {}
3084
3085
# This is used to redirect stdout and stderr for checker processes
3086
global wnull
3087
wnull = open(os.devnull, "w") # A writable /dev/null
3088
# Only used if server is running in foreground but not in debug
3089
# mode
3090
if debug or not foreground:
3091
wnull.close()
3092
3093
# Get client data and settings from last running state.
3094
if server_settings["restore"]:
3095
try:
3096
with open(stored_state_path, "rb") as stored_state:
3097
if sys.version_info.major == 2:
3098
clients_data, old_client_settings = pickle.load(
3099
stored_state)
3100
else:
3101
bytes_clients_data, bytes_old_client_settings = (
3102
pickle.load(stored_state, encoding="bytes"))
3103
# Fix bytes to strings
3104
# clients_data
3105
# .keys()
3106
clients_data = {(key.decode("utf-8")
3107
if isinstance(key, bytes)
3108
else key): value
3109
for key, value in
3110
bytes_clients_data.items()}
3111
del bytes_clients_data
3112
for key in clients_data:
3113
value = {(k.decode("utf-8")
3114
if isinstance(k, bytes) else k): v
3115
for k, v in
3116
clients_data[key].items()}
3117
clients_data[key] = value
3118
# .client_structure
3119
value["client_structure"] = [
3120
(s.decode("utf-8")
3121
if isinstance(s, bytes)
3122
else s) for s in
3123
value["client_structure"]]
3124
# .name & .host
3125
for k in ("name", "host"):
3126
if isinstance(value[k], bytes):
3127
value[k] = value[k].decode("utf-8")
3128
# old_client_settings
3129
# .keys()
3130
old_client_settings = {
3131
(key.decode("utf-8")
3132
if isinstance(key, bytes)
3133
else key): value
3134
for key, value in
3135
bytes_old_client_settings.items()}
3136
del bytes_old_client_settings
3137
# .host
3138
for value in old_client_settings.values():
3139
if isinstance(value["host"], bytes):
3140
value["host"] = (value["host"]
3141
.decode("utf-8"))
3142
os.remove(stored_state_path)
3143
except IOError as e:
3144
if e.errno == errno.ENOENT:
3145
logger.warning("Could not load persistent state:"
3146
" {}".format(os.strerror(e.errno)))
3147
else:
3148
logger.critical("Could not load persistent state:",
3149
exc_info=e)
3150
raise
3151
except EOFError as e:
3152
logger.warning("Could not load persistent state: "
3153
"EOFError:",
3154
exc_info=e)
3155
3156
with PGPEngine() as pgp:
3157
for client_name, client in clients_data.items():
3158
# Skip removed clients
3159
if client_name not in client_settings:
3160
continue
3161
3162
# Decide which value to use after restoring saved state.
3163
# We have three different values: Old config file,
3164
# new config file, and saved state.
3165
# New config value takes precedence if it differs from old
3166
# config value, otherwise use saved state.
3167
for name, value in client_settings[client_name].items():
3168
try:
3169
# For each value in new config, check if it
3170
# differs from the old config value (Except for
3171
# the "secret" attribute)
3172
if (name != "secret"
3173
and (value !=
3174
old_client_settings[client_name][name])):
3175
client[name] = value
3176
except KeyError:
3177
pass
3178
3179
# Clients who has passed its expire date can still be
3180
# enabled if its last checker was successful. A Client
3181
# whose checker succeeded before we stored its state is
3182
# assumed to have successfully run all checkers during
3183
# downtime.
3184
if client["enabled"]:
3185
if datetime.datetime.utcnow() >= client["expires"]:
3186
if not client["last_checked_ok"]:
3187
logger.warning(
3188
"disabling client {} - Client never "
3189
"performed a successful checker".format(
3190
client_name))
3191
client["enabled"] = False
3192
elif client["last_checker_status"] != 0:
3193
logger.warning(
3194
"disabling client {} - Client last"
3195
" checker failed with error code"
3196
" {}".format(
3197
client_name,
3198
client["last_checker_status"]))
3199
client["enabled"] = False
3200
else:
3201
client["expires"] = (
3202
datetime.datetime.utcnow()
3203
+ client["timeout"])
3204
logger.debug("Last checker succeeded,"
3205
" keeping {} enabled".format(
3206
client_name))
1900
client_class = functools.partial(ClientDBus, bus = bus)
1901
def client_config_items(config, section):
1902
special_settings = {
1903
"approved_by_default":
1904
lambda: config.getboolean(section,
1905
"approved_by_default"),
1906
}
1907
for name, value in config.items(section):
3207
1908
try:
3208
client["secret"] = pgp.decrypt(
3209
client["encrypted_secret"],
3210
client_settings[client_name]["secret"])
3211
except PGPError:
3212
# If decryption fails, we use secret from new settings
3213
logger.debug("Failed to decrypt {} old secret".format(
3214
client_name))
3215
client["secret"] = (client_settings[client_name]
3216
["secret"])
3217
3218
# Add/remove clients based on new changes made to config
3219
for client_name in (set(old_client_settings)
3220
- set(client_settings)):
3221
del clients_data[client_name]
3222
for client_name in (set(client_settings)
3223
- set(old_client_settings)):
3224
clients_data[client_name] = client_settings[client_name]
3225
3226
# Create all client objects
3227
for client_name, client in clients_data.items():
3228
tcp_server.clients[client_name] = client_class(
3229
name=client_name,
3230
settings=client,
3231
server_settings=server_settings)
3232
1909
yield (name, special_settings[name]())
1910
except KeyError:
1911
yield (name, value)
1912
1913
tcp_server.clients.update(set(
1914
client_class(name = section,
1915
config= dict(client_config_items(
1916
client_config, section)))
1917
for section in client_config.sections()))
3233
1918
if not tcp_server.clients:
3234
1919
logger.warning("No clients defined")
3235
3236
if not foreground:
3237
if pidfile is not None:
3238
pid = os.getpid()
3239
try:
3240
with pidfile:
3241
print(pid, file=pidfile)
3242
except IOError:
3243
logger.error("Could not write to file %r with PID %d",
3244
pidfilename, pid)
3245
del pidfile
1920
1921
if not debug:
1922
try:
1923
with pidfile:
1924
pid = os.getpid()
1925
pidfile.write(str(pid) + "\n".encode("utf-8"))
1926
del pidfile
1927
except IOError:
1928
logger.error("Could not write to file %r with PID %d",
1929
pidfilename, pid)
1930
except NameError:
1931
# "pidfile" was never created
1932
pass
3246
1933
del pidfilename
3247
3248
for termsig in (signal.SIGHUP, signal.SIGTERM):
3249
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3250
lambda: main_loop.quit() and False)
3251
1934
1935
signal.signal(signal.SIGINT, signal.SIG_IGN)
1936
1937
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1938
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1939
3252
1940
if use_dbus:
3253
3254
@alternate_dbus_interfaces(
3255
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3256
class MandosDBusService(DBusObjectWithObjectManager):
1941
class MandosDBusService(dbus.service.Object):
3257
1942
"""A D-Bus proxy object"""
3258
3259
1943
def __init__(self):
3260
1944
dbus.service.Object.__init__(self, bus, "/")
3261
3262
_interface = "se.recompile.Mandos"
3263
1945
_interface = "se.bsnet.fukt.Mandos"
1946
3264
1947
@dbus.service.signal(_interface, signature="o")
3265
1948
def ClientAdded(self, objpath):
3266
1949
"D-Bus signal"
3267
1950
pass
3268
1951
3269
1952
@dbus.service.signal(_interface, signature="ss")
3270
1953
def ClientNotFound(self, fingerprint, address):
3271
1954
"D-Bus signal"
3272
1955
pass
3273
3274
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3275
"true"})
1956
3276
1957
@dbus.service.signal(_interface, signature="os")
3277
1958
def ClientRemoved(self, objpath, name):
3278
1959
"D-Bus signal"
3279
1960
pass
3280
3281
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3282
"true"})
1961
3283
1962
@dbus.service.method(_interface, out_signature="ao")
3284
1963
def GetAllClients(self):
3285
1964
"D-Bus method"
3286
return dbus.Array(c.dbus_object_path for c in
3287
tcp_server.clients.values())
3288
3289
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3290
"true"})
1965
return dbus.Array(c.dbus_object_path
1966
for c in tcp_server.clients)
1967
3291
1968
@dbus.service.method(_interface,
3292
1969
out_signature="a{oa{sv}}")
3293
1970
def GetAllClientsWithProperties(self):
3294
1971
"D-Bus method"
3295
1972
return dbus.Dictionary(
3296
{c.dbus_object_path: c.GetAll(
3297
"se.recompile.Mandos.Client")
3298
for c in tcp_server.clients.values()},
1973
((c.dbus_object_path, c.GetAll(""))
1974
for c in tcp_server.clients),
3299
1975
signature="oa{sv}")
3300
1976
3301
1977
@dbus.service.method(_interface, in_signature="o")
3302
1978
def RemoveClient(self, object_path):
3303
1979
"D-Bus method"
3304
for c in tcp_server.clients.values():
1980
for c in tcp_server.clients:
3305
1981
if c.dbus_object_path == object_path:
3306
del tcp_server.clients[c.name]
1982
tcp_server.clients.remove(c)
3307
1983
c.remove_from_connection()
3308
# Don't signal the disabling
1984
# Don't signal anything except ClientRemoved
3309
1985
c.disable(quiet=True)
3310
# Emit D-Bus signal for removal
3311
self.client_removed_signal(c)
1986
# Emit D-Bus signal
1987
self.ClientRemoved(object_path, c.name)
3312
1988
return
3313
1989
raise KeyError(object_path)
3314
1990
3315
1991
del _interface
3316
3317
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3318
out_signature="a{oa{sa{sv}}}")
3319
def GetManagedObjects(self):
3320
"""D-Bus method"""
3321
return dbus.Dictionary(
3322
{client.dbus_object_path:
3323
dbus.Dictionary(
3324
{interface: client.GetAll(interface)
3325
for interface in
3326
client._get_all_interface_names()})
3327
for client in tcp_server.clients.values()})
3328
3329
def client_added_signal(self, client):
3330
"""Send the new standard signal and the old signal"""
3331
if use_dbus:
3332
# New standard signal
3333
self.InterfacesAdded(
3334
client.dbus_object_path,
3335
dbus.Dictionary(
3336
{interface: client.GetAll(interface)
3337
for interface in
3338
client._get_all_interface_names()}))
3339
# Old signal
3340
self.ClientAdded(client.dbus_object_path)
3341
3342
def client_removed_signal(self, client):
3343
"""Send the new standard signal and the old signal"""
3344
if use_dbus:
3345
# New standard signal
3346
self.InterfacesRemoved(
3347
client.dbus_object_path,
3348
client._get_all_interface_names())
3349
# Old signal
3350
self.ClientRemoved(client.dbus_object_path,
3351
client.name)
3352
1992
3353
1993
mandos_dbus_service = MandosDBusService()
3354
3355
# Save modules to variables to exempt the modules from being
3356
# unloaded before the function registered with atexit() is run.
3357
mp = multiprocessing
3358
wn = wnull
3359
1994
3360
1995
def cleanup():
3361
1996
"Cleanup function; run on exit"
3362
if zeroconf:
3363
service.cleanup()
3364
3365
mp.active_children()
3366
wn.close()
3367
if not (tcp_server.clients or client_settings):
3368
return
3369
3370
# Store client before exiting. Secrets are encrypted with key
3371
# based on what config file has. If config file is
3372
# removed/edited, old secret will thus be unrecovable.
3373
clients = {}
3374
with PGPEngine() as pgp:
3375
for client in tcp_server.clients.values():
3376
key = client_settings[client.name]["secret"]
3377
client.encrypted_secret = pgp.encrypt(client.secret,
3378
key)
3379
client_dict = {}
3380
3381
# A list of attributes that can not be pickled
3382
# + secret.
3383
exclude = {"bus", "changedstate", "secret",
3384
"checker", "server_settings"}
3385
for name, typ in inspect.getmembers(dbus.service
3386
.Object):
3387
exclude.add(name)
3388
3389
client_dict["encrypted_secret"] = (client
3390
.encrypted_secret)
3391
for attr in client.client_structure:
3392
if attr not in exclude:
3393
client_dict[attr] = getattr(client, attr)
3394
3395
clients[client.name] = client_dict
3396
del client_settings[client.name]["secret"]
3397
3398
try:
3399
with tempfile.NamedTemporaryFile(
3400
mode='wb',
3401
suffix=".pickle",
3402
prefix='clients-',
3403
dir=os.path.dirname(stored_state_path),
3404
delete=False) as stored_state:
3405
pickle.dump((clients, client_settings), stored_state,
3406
protocol=2)
3407
tempname = stored_state.name
3408
os.rename(tempname, stored_state_path)
3409
except (IOError, OSError) as e:
3410
if not debug:
3411
try:
3412
os.remove(tempname)
3413
except NameError:
3414
pass
3415
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
3416
logger.warning("Could not save persistent state: {}"
3417
.format(os.strerror(e.errno)))
3418
else:
3419
logger.warning("Could not save persistent state:",
3420
exc_info=e)
3421
raise
3422
3423
# Delete all clients, and settings from config
1997
service.cleanup()
1998
3424
1999
while tcp_server.clients:
3425
name, client = tcp_server.clients.popitem()
2000
client = tcp_server.clients.pop()
3426
2001
if use_dbus:
3427
2002
client.remove_from_connection()
3428
# Don't signal the disabling
2003
client.disable_hook = None
2004
# Don't signal anything except ClientRemoved
3429
2005
client.disable(quiet=True)
3430
# Emit D-Bus signal for removal
3431
2006
if use_dbus:
3432
mandos_dbus_service.client_removed_signal(client)
3433
client_settings.clear()
3434
2007
# Emit D-Bus signal
2008
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
2009
client.name)
2010
3435
2011
atexit.register(cleanup)
3436
3437
for client in tcp_server.clients.values():
2012
2013
for client in tcp_server.clients:
3438
2014
if use_dbus:
3439
# Emit D-Bus signal for adding
3440
mandos_dbus_service.client_added_signal(client)
3441
# Need to initiate checking of clients
3442
if client.enabled:
3443
client.init_checker()
3444
2015
# Emit D-Bus signal
2016
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2017
client.enable()
2018
3445
2019
tcp_server.enable()
3446
2020
tcp_server.server_activate()
3447
2021
3448
2022
# Find out what port we got
3449
if zeroconf:
3450
service.port = tcp_server.socket.getsockname()[1]
2023
service.port = tcp_server.socket.getsockname()[1]
3451
2024
if use_ipv6:
3452
2025
logger.info("Now listening on address %r, port %d,"
3453
" flowinfo %d, scope_id %d",
3454
*tcp_server.socket.getsockname())
2026
" flowinfo %d, scope_id %d"
2027
% tcp_server.socket.getsockname())
3455
2028
else: # IPv4
3456
logger.info("Now listening on address %r, port %d",
3457
*tcp_server.socket.getsockname())
3458
3459
# service.interface = tcp_server.socket.getsockname()[3]
3460
2029
logger.info("Now listening on address %r, port %d"
2030
% tcp_server.socket.getsockname())
2031
2032
#service.interface = tcp_server.socket.getsockname()[3]
2033
3461
2034
try:
3462
if zeroconf:
3463
# From the Avahi example code
3464
try:
3465
service.activate()
3466
except dbus.exceptions.DBusException as error:
3467
logger.critical("D-Bus Exception", exc_info=error)
3468
cleanup()
3469
sys.exit(1)
3470
# End of Avahi example code
3471
3472
GLib.io_add_watch(tcp_server.fileno(), GLib.IO_IN,
3473
lambda *args, **kwargs:
3474
(tcp_server.handle_request
3475
(*args[2:], **kwargs) or True))
3476
2035
# From the Avahi example code
2036
try:
2037
service.activate()
2038
except dbus.exceptions.DBusException as error:
2039
logger.critical("DBusException: %s", error)
2040
cleanup()
2041
sys.exit(1)
2042
# End of Avahi example code
2043
2044
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2045
lambda *args, **kwargs:
2046
(tcp_server.handle_request
2047
(*args[2:], **kwargs) or True))
2048
3477
2049
logger.debug("Starting main loop")
3478
2050
main_loop.run()
3479
2051
except AvahiError as error:
3480
logger.critical("Avahi Error", exc_info=error)
2052
logger.critical("AvahiError: %s", error)
3481
2053
cleanup()
3482
2054
sys.exit(1)
3483
2055
except KeyboardInterrupt:
3488
2060
# Must run before the D-Bus bus name gets deregistered
3489
2061
cleanup()
3490
2062
3491
3492
2063
if __name__ == '__main__':
3493
2064
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0