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- Committer: Teddy Hogeborn
- Date: 2008-08-18 05:24:20 UTC
- Revision ID: teddy@fukt.bsnet.se-20080818052420-ab5eurrioz8n2qy6
* Makefile: Bug fix: fixed creation of man pages in "plugins.d".
* mandos-keygen Bug fix: make the --expire option modify
KEYEXPIRE, not KEYCOMMENT. Use the "--no-options"
option to gpg when exporting keys from the temporary
key ring files.
* mandos-keygen.xml (EXIT STATUS): Filled in.
(ENVIRONMENT): New section, documenting use of TMPDIR.
(FILES): Document use of key files and /tmp.
(BUGS): Filled in.
(EXAMPLE): Added two examples.
(SECURITY): Added some text.
* plugins.d/password-prompt.xml (NOTES): Removed, since this is
created automatically for
footnotes.
(ENVIRONMENT, FILES): Added empty sections.
(EXAMPLES): Renamed to "EXAMPLE", as per man-pages(7).
* plugins.d/password-request.xml: Reordered sections.
(ENVIRONMENT): New empty section.
(EXAMPLES): Renamed to "EXAMPLE", as per man-pages(7).
* mandos-keygen Bug fix: make the --expire option modify
KEYEXPIRE, not KEYCOMMENT. Use the "--no-options"
option to gpg when exporting keys from the temporary
key ring files.
* mandos-keygen.xml (EXIT STATUS): Filled in.
(ENVIRONMENT): New section, documenting use of TMPDIR.
(FILES): Document use of key files and /tmp.
(BUGS): Filled in.
(EXAMPLE): Added two examples.
(SECURITY): Added some text.
* plugins.d/password-prompt.xml (NOTES): Removed, since this is
created automatically for
footnotes.
(ENVIRONMENT, FILES): Added empty sections.
(EXAMPLES): Renamed to "EXAMPLE", as per man-pages(7).
* plugins.d/password-request.xml: Reordered sections.
(ENVIRONMENT): New empty section.
(EXAMPLES): Renamed to "EXAMPLE", as per man-pages(7).
- files added:
- plugins.d/usplash
- files removed:
- .bzr-builddeb
- debian
- debian/po
- debian/source
- debian/upstream
- network-hooks.d
- plugin-helpers
- files renamed:
- plugins.d/mandos-client.c => plugins.d/password-request.c
- plugins.d/mandos-client.xml => plugins.d/password-request.xml
- files modified:
- Makefile
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
# methods "add", "remove", "server_state_changed",
10
# "entry_group_state_changed", "cleanup", and "activate" in the
11
# "AvahiService" class, and some lines in "main".
12
#
9
# methods "add" and "remove" in the "AvahiService" class, the
10
# "server_state_changed" and "entry_group_state_changed" functions,
11
# and some lines in "main".
12
#
13
13
# Everything else is
14
# Copyright © 2008-2016 Teddy Hogeborn
15
# Copyright © 2008-2016 Björn Påhlsson
16
#
14
# Copyright © 2007-2008 Teddy Hogeborn & Björn Påhlsson
15
#
17
16
# This program is free software: you can redistribute it and/or modify
18
17
# it under the terms of the GNU General Public License as published by
19
18
# the Free Software Foundation, either version 3 of the License, or
23
22
# but WITHOUT ANY WARRANTY; without even the implied warranty of
24
23
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
25
24
# GNU General Public License for more details.
26
#
25
#
27
26
# You should have received a copy of the GNU General Public License
28
# along with this program. If not, see
29
# <http://www.gnu.org/licenses/>.
30
#
31
# Contact the authors at <mandos@recompile.se>.
32
#
33
34
from __future__ import (division, absolute_import, print_function,
35
unicode_literals)
36
37
try:
38
from future_builtins import *
39
except ImportError:
40
pass
41
42
try:
43
import SocketServer as socketserver
44
except ImportError:
45
import socketserver
27
# along with this program. If not, see <http://www.gnu.org/licenses/>.
28
#
29
# Contact the authors at <mandos@fukt.bsnet.se>.
30
#
31
32
from __future__ import division
33
34
import SocketServer
46
35
import socket
47
import argparse
36
import select
37
from optparse import OptionParser
48
38
import datetime
49
39
import errno
50
try:
51
import ConfigParser as configparser
52
except ImportError:
53
import configparser
40
import gnutls.crypto
41
import gnutls.connection
42
import gnutls.errors
43
import gnutls.library.functions
44
import gnutls.library.constants
45
import gnutls.library.types
46
import ConfigParser
54
47
import sys
55
48
import re
56
49
import os
57
50
import signal
51
from sets import Set
58
52
import subprocess
59
53
import atexit
60
54
import stat
61
55
import logging
62
56
import logging.handlers
63
import pwd
64
import contextlib
65
import struct
66
import fcntl
67
import functools
68
try:
69
import cPickle as pickle
70
except ImportError:
71
import pickle
72
import multiprocessing
73
import types
74
import binascii
75
import tempfile
76
import itertools
77
import collections
78
import codecs
79
57
80
58
import dbus
81
import dbus.service
82
from gi.repository import GLib
59
import gobject
60
import avahi
83
61
from dbus.mainloop.glib import DBusGMainLoop
84
62
import ctypes
85
import ctypes.util
86
import xml.dom.minidom
87
import inspect
88
89
# Try to find the value of SO_BINDTODEVICE:
90
try:
91
# This is where SO_BINDTODEVICE is in Python 3.3 (or 3.4?) and
92
# newer, and it is also the most natural place for it:
93
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
94
except AttributeError:
95
try:
96
# This is where SO_BINDTODEVICE was up to and including Python
97
# 2.6, and also 3.2:
98
from IN import SO_BINDTODEVICE
99
except ImportError:
100
# In Python 2.7 it seems to have been removed entirely.
101
# Try running the C preprocessor:
102
try:
103
cc = subprocess.Popen(["cc", "--language=c", "-E",
104
"/dev/stdin"],
105
stdin=subprocess.PIPE,
106
stdout=subprocess.PIPE)
107
stdout = cc.communicate(
108
"#include <sys/socket.h>\nSO_BINDTODEVICE\n")[0]
109
SO_BINDTODEVICE = int(stdout.splitlines()[-1])
110
except (OSError, ValueError, IndexError):
111
# No value found
112
SO_BINDTODEVICE = None
113
114
if sys.version_info.major == 2:
115
str = unicode
116
117
version = "1.7.10"
118
stored_state_file = "clients.pickle"
119
120
logger = logging.getLogger()
121
syslogger = None
122
123
try:
124
if_nametoindex = ctypes.cdll.LoadLibrary(
125
ctypes.util.find_library("c")).if_nametoindex
126
except (OSError, AttributeError):
127
128
def if_nametoindex(interface):
129
"Get an interface index the hard way, i.e. using fcntl()"
130
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
131
with contextlib.closing(socket.socket()) as s:
132
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
133
struct.pack(b"16s16x", interface))
134
interface_index = struct.unpack("I", ifreq[16:20])[0]
135
return interface_index
136
137
138
def copy_function(func):
139
"""Make a copy of a function"""
140
if sys.version_info.major == 2:
141
return types.FunctionType(func.func_code,
142
func.func_globals,
143
func.func_name,
144
func.func_defaults,
145
func.func_closure)
146
else:
147
return types.FunctionType(func.__code__,
148
func.__globals__,
149
func.__name__,
150
func.__defaults__,
151
func.__closure__)
152
153
154
def initlogger(debug, level=logging.WARNING):
155
"""init logger and add loglevel"""
156
157
global syslogger
158
syslogger = (logging.handlers.SysLogHandler(
159
facility=logging.handlers.SysLogHandler.LOG_DAEMON,
160
address="/dev/log"))
161
syslogger.setFormatter(logging.Formatter
162
('Mandos [%(process)d]: %(levelname)s:'
163
' %(message)s'))
164
logger.addHandler(syslogger)
165
166
if debug:
167
console = logging.StreamHandler()
168
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
169
' [%(process)d]:'
170
' %(levelname)s:'
171
' %(message)s'))
172
logger.addHandler(console)
173
logger.setLevel(level)
174
175
176
class PGPError(Exception):
177
"""Exception if encryption/decryption fails"""
178
pass
179
180
181
class PGPEngine(object):
182
"""A simple class for OpenPGP symmetric encryption & decryption"""
183
184
def __init__(self):
185
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
186
self.gpg = "gpg"
187
try:
188
output = subprocess.check_output(["gpgconf"])
189
for line in output.splitlines():
190
name, text, path = line.split(b":")
191
if name == "gpg":
192
self.gpg = path
193
break
194
except OSError as e:
195
if e.errno != errno.ENOENT:
196
raise
197
self.gnupgargs = ['--batch',
198
'--homedir', self.tempdir,
199
'--force-mdc',
200
'--quiet']
201
# Only GPG version 1 has the --no-use-agent option.
202
if self.gpg == "gpg" or self.gpg.endswith("/gpg"):
203
self.gnupgargs.append("--no-use-agent")
204
205
def __enter__(self):
206
return self
207
208
def __exit__(self, exc_type, exc_value, traceback):
209
self._cleanup()
210
return False
211
212
def __del__(self):
213
self._cleanup()
214
215
def _cleanup(self):
216
if self.tempdir is not None:
217
# Delete contents of tempdir
218
for root, dirs, files in os.walk(self.tempdir,
219
topdown=False):
220
for filename in files:
221
os.remove(os.path.join(root, filename))
222
for dirname in dirs:
223
os.rmdir(os.path.join(root, dirname))
224
# Remove tempdir
225
os.rmdir(self.tempdir)
226
self.tempdir = None
227
228
def password_encode(self, password):
229
# Passphrase can not be empty and can not contain newlines or
230
# NUL bytes. So we prefix it and hex encode it.
231
encoded = b"mandos" + binascii.hexlify(password)
232
if len(encoded) > 2048:
233
# GnuPG can't handle long passwords, so encode differently
234
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
235
.replace(b"\n", b"\\n")
236
.replace(b"\0", b"\\x00"))
237
return encoded
238
239
def encrypt(self, data, password):
240
passphrase = self.password_encode(password)
241
with tempfile.NamedTemporaryFile(
242
dir=self.tempdir) as passfile:
243
passfile.write(passphrase)
244
passfile.flush()
245
proc = subprocess.Popen([self.gpg, '--symmetric',
246
'--passphrase-file',
247
passfile.name]
248
+ self.gnupgargs,
249
stdin=subprocess.PIPE,
250
stdout=subprocess.PIPE,
251
stderr=subprocess.PIPE)
252
ciphertext, err = proc.communicate(input=data)
253
if proc.returncode != 0:
254
raise PGPError(err)
255
return ciphertext
256
257
def decrypt(self, data, password):
258
passphrase = self.password_encode(password)
259
with tempfile.NamedTemporaryFile(
260
dir=self.tempdir) as passfile:
261
passfile.write(passphrase)
262
passfile.flush()
263
proc = subprocess.Popen([self.gpg, '--decrypt',
264
'--passphrase-file',
265
passfile.name]
266
+ self.gnupgargs,
267
stdin=subprocess.PIPE,
268
stdout=subprocess.PIPE,
269
stderr=subprocess.PIPE)
270
decrypted_plaintext, err = proc.communicate(input=data)
271
if proc.returncode != 0:
272
raise PGPError(err)
273
return decrypted_plaintext
274
275
276
# Pretend that we have an Avahi module
277
class Avahi(object):
278
"""This isn't so much a class as it is a module-like namespace.
279
It is instantiated once, and simulates having an Avahi module."""
280
IF_UNSPEC = -1 # avahi-common/address.h
281
PROTO_UNSPEC = -1 # avahi-common/address.h
282
PROTO_INET = 0 # avahi-common/address.h
283
PROTO_INET6 = 1 # avahi-common/address.h
284
DBUS_NAME = "org.freedesktop.Avahi"
285
DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"
286
DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"
287
DBUS_PATH_SERVER = "/"
288
289
def string_array_to_txt_array(self, t):
290
return dbus.Array((dbus.ByteArray(s.encode("utf-8"))
291
for s in t), signature="ay")
292
ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h
293
ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h
294
ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h
295
SERVER_INVALID = 0 # avahi-common/defs.h
296
SERVER_REGISTERING = 1 # avahi-common/defs.h
297
SERVER_RUNNING = 2 # avahi-common/defs.h
298
SERVER_COLLISION = 3 # avahi-common/defs.h
299
SERVER_FAILURE = 4 # avahi-common/defs.h
300
avahi = Avahi()
301
63
64
version = "1.0"
65
66
logger = logging.Logger('mandos')
67
syslogger = logging.handlers.SysLogHandler\
68
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
69
address = "/dev/log")
70
syslogger.setFormatter(logging.Formatter\
71
('Mandos: %(levelname)s: %(message)s'))
72
logger.addHandler(syslogger)
73
74
console = logging.StreamHandler()
75
console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
76
' %(message)s'))
77
logger.addHandler(console)
302
78
303
79
class AvahiError(Exception):
304
def __init__(self, value, *args, **kwargs):
80
def __init__(self, value):
305
81
self.value = value
306
return super(AvahiError, self).__init__(value, *args,
307
**kwargs)
308
82
def __str__(self):
83
return repr(self.value)
309
84
310
85
class AvahiServiceError(AvahiError):
311
86
pass
312
87
313
314
88
class AvahiGroupError(AvahiError):
315
89
pass
316
90
317
91
318
92
class AvahiService(object):
319
93
"""An Avahi (Zeroconf) service.
320
321
94
Attributes:
322
95
interface: integer; avahi.IF_UNSPEC or an interface index.
323
96
Used to optionally bind to the specified interface.
324
97
name: string; Example: 'Mandos'
325
98
type: string; Example: '_mandos._tcp'.
326
See <https://www.iana.org/assignments/service-names-port-numbers>
99
See <http://www.dns-sd.org/ServiceTypes.html>
327
100
port: integer; what port to announce
328
101
TXT: list of strings; TXT record for the service
329
102
domain: string; Domain to publish on, default to .local if empty.
331
104
max_renames: integer; maximum number of renames
332
105
rename_count: integer; counter so we only rename after collisions
333
106
a sensible number of times
334
group: D-Bus Entry Group
335
server: D-Bus Server
336
bus: dbus.SystemBus()
337
107
"""
338
339
def __init__(self,
340
interface=avahi.IF_UNSPEC,
341
name=None,
342
servicetype=None,
343
port=None,
344
TXT=None,
345
domain="",
346
host="",
347
max_renames=32768,
348
protocol=avahi.PROTO_UNSPEC,
349
bus=None):
108
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
109
type = None, port = None, TXT = None, domain = "",
110
host = "", max_renames = 32768):
350
111
self.interface = interface
351
112
self.name = name
352
self.type = servicetype
113
self.type = type
353
114
self.port = port
354
self.TXT = TXT if TXT is not None else []
115
if TXT is None:
116
self.TXT = []
117
else:
118
self.TXT = TXT
355
119
self.domain = domain
356
120
self.host = host
357
121
self.rename_count = 0
358
122
self.max_renames = max_renames
359
self.protocol = protocol
360
self.group = None # our entry group
361
self.server = None
362
self.bus = bus
363
self.entry_group_state_changed_match = None
364
365
def rename(self, remove=True):
123
def rename(self):
366
124
"""Derived from the Avahi example code"""
367
125
if self.rename_count >= self.max_renames:
368
logger.critical("No suitable Zeroconf service name found"
369
" after %i retries, exiting.",
370
self.rename_count)
126
logger.critical(u"No suitable service name found after %i"
127
u" retries, exiting.", rename_count)
371
128
raise AvahiServiceError("Too many renames")
372
self.name = str(
373
self.server.GetAlternativeServiceName(self.name))
129
self.name = server.GetAlternativeServiceName(self.name)
130
logger.info(u"Changing name to %r ...", str(self.name))
131
syslogger.setFormatter(logging.Formatter\
132
('Mandos (%s): %%(levelname)s:'
133
' %%(message)s' % self.name))
134
self.remove()
135
self.add()
374
136
self.rename_count += 1
375
logger.info("Changing Zeroconf service name to %r ...",
376
self.name)
377
if remove:
378
self.remove()
379
try:
380
self.add()
381
except dbus.exceptions.DBusException as error:
382
if (error.get_dbus_name()
383
== "org.freedesktop.Avahi.CollisionError"):
384
logger.info("Local Zeroconf service name collision.")
385
return self.rename(remove=False)
386
else:
387
logger.critical("D-Bus Exception", exc_info=error)
388
self.cleanup()
389
os._exit(1)
390
391
137
def remove(self):
392
138
"""Derived from the Avahi example code"""
393
if self.entry_group_state_changed_match is not None:
394
self.entry_group_state_changed_match.remove()
395
self.entry_group_state_changed_match = None
396
if self.group is not None:
397
self.group.Reset()
398
139
if group is not None:
140
group.Reset()
399
141
def add(self):
400
142
"""Derived from the Avahi example code"""
401
self.remove()
402
if self.group is None:
403
self.group = dbus.Interface(
404
self.bus.get_object(avahi.DBUS_NAME,
405
self.server.EntryGroupNew()),
406
avahi.DBUS_INTERFACE_ENTRY_GROUP)
407
self.entry_group_state_changed_match = (
408
self.group.connect_to_signal(
409
'StateChanged', self.entry_group_state_changed))
410
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
411
self.name, self.type)
412
self.group.AddService(
413
self.interface,
414
self.protocol,
415
dbus.UInt32(0), # flags
416
self.name, self.type,
417
self.domain, self.host,
418
dbus.UInt16(self.port),
419
avahi.string_array_to_txt_array(self.TXT))
420
self.group.Commit()
421
422
def entry_group_state_changed(self, state, error):
423
"""Derived from the Avahi example code"""
424
logger.debug("Avahi entry group state change: %i", state)
425
426
if state == avahi.ENTRY_GROUP_ESTABLISHED:
427
logger.debug("Zeroconf service established.")
428
elif state == avahi.ENTRY_GROUP_COLLISION:
429
logger.info("Zeroconf service name collision.")
430
self.rename()
431
elif state == avahi.ENTRY_GROUP_FAILURE:
432
logger.critical("Avahi: Error in group state changed %s",
433
str(error))
434
raise AvahiGroupError("State changed: {!s}".format(error))
435
436
def cleanup(self):
437
"""Derived from the Avahi example code"""
438
if self.group is not None:
439
try:
440
self.group.Free()
441
except (dbus.exceptions.UnknownMethodException,
442
dbus.exceptions.DBusException):
443
pass
444
self.group = None
445
self.remove()
446
447
def server_state_changed(self, state, error=None):
448
"""Derived from the Avahi example code"""
449
logger.debug("Avahi server state change: %i", state)
450
bad_states = {
451
avahi.SERVER_INVALID: "Zeroconf server invalid",
452
avahi.SERVER_REGISTERING: None,
453
avahi.SERVER_COLLISION: "Zeroconf server name collision",
454
avahi.SERVER_FAILURE: "Zeroconf server failure",
455
}
456
if state in bad_states:
457
if bad_states[state] is not None:
458
if error is None:
459
logger.error(bad_states[state])
460
else:
461
logger.error(bad_states[state] + ": %r", error)
462
self.cleanup()
463
elif state == avahi.SERVER_RUNNING:
464
try:
465
self.add()
466
except dbus.exceptions.DBusException as error:
467
if (error.get_dbus_name()
468
== "org.freedesktop.Avahi.CollisionError"):
469
logger.info("Local Zeroconf service name"
470
" collision.")
471
return self.rename(remove=False)
472
else:
473
logger.critical("D-Bus Exception", exc_info=error)
474
self.cleanup()
475
os._exit(1)
476
else:
477
if error is None:
478
logger.debug("Unknown state: %r", state)
479
else:
480
logger.debug("Unknown state: %r: %r", state, error)
481
482
def activate(self):
483
"""Derived from the Avahi example code"""
484
if self.server is None:
485
self.server = dbus.Interface(
486
self.bus.get_object(avahi.DBUS_NAME,
487
avahi.DBUS_PATH_SERVER,
488
follow_name_owner_changes=True),
489
avahi.DBUS_INTERFACE_SERVER)
490
self.server.connect_to_signal("StateChanged",
491
self.server_state_changed)
492
self.server_state_changed(self.server.GetState())
493
494
495
class AvahiServiceToSyslog(AvahiService):
496
def rename(self, *args, **kwargs):
497
"""Add the new name to the syslog messages"""
498
ret = AvahiService.rename(self, *args, **kwargs)
499
syslogger.setFormatter(logging.Formatter(
500
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
501
.format(self.name)))
502
return ret
503
504
505
# Pretend that we have a GnuTLS module
506
class GnuTLS(object):
507
"""This isn't so much a class as it is a module-like namespace.
508
It is instantiated once, and simulates having a GnuTLS module."""
509
510
_library = ctypes.cdll.LoadLibrary(
511
ctypes.util.find_library("gnutls"))
512
_need_version = b"3.3.0"
513
514
def __init__(self):
515
# Need to use class name "GnuTLS" here, since this method is
516
# called before the assignment to the "gnutls" global variable
517
# happens.
518
if GnuTLS.check_version(self._need_version) is None:
519
raise GnuTLS.Error("Needs GnuTLS {} or later"
520
.format(self._need_version))
521
522
# Unless otherwise indicated, the constants and types below are
523
# all from the gnutls/gnutls.h C header file.
524
525
# Constants
526
E_SUCCESS = 0
527
E_INTERRUPTED = -52
528
E_AGAIN = -28
529
CRT_OPENPGP = 2
530
CLIENT = 2
531
SHUT_RDWR = 0
532
CRD_CERTIFICATE = 1
533
E_NO_CERTIFICATE_FOUND = -49
534
OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
535
536
# Types
537
class session_int(ctypes.Structure):
538
_fields_ = []
539
session_t = ctypes.POINTER(session_int)
540
541
class certificate_credentials_st(ctypes.Structure):
542
_fields_ = []
543
certificate_credentials_t = ctypes.POINTER(
544
certificate_credentials_st)
545
certificate_type_t = ctypes.c_int
546
547
class datum_t(ctypes.Structure):
548
_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
549
('size', ctypes.c_uint)]
550
551
class openpgp_crt_int(ctypes.Structure):
552
_fields_ = []
553
openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
554
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
555
log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
556
credentials_type_t = ctypes.c_int
557
transport_ptr_t = ctypes.c_void_p
558
close_request_t = ctypes.c_int
559
560
# Exceptions
561
class Error(Exception):
562
# We need to use the class name "GnuTLS" here, since this
563
# exception might be raised from within GnuTLS.__init__,
564
# which is called before the assignment to the "gnutls"
565
# global variable has happened.
566
def __init__(self, message=None, code=None, args=()):
567
# Default usage is by a message string, but if a return
568
# code is passed, convert it to a string with
569
# gnutls.strerror()
570
self.code = code
571
if message is None and code is not None:
572
message = GnuTLS.strerror(code)
573
return super(GnuTLS.Error, self).__init__(
574
message, *args)
575
576
class CertificateSecurityError(Error):
577
pass
578
579
# Classes
580
class Credentials(object):
581
def __init__(self):
582
self._c_object = gnutls.certificate_credentials_t()
583
gnutls.certificate_allocate_credentials(
584
ctypes.byref(self._c_object))
585
self.type = gnutls.CRD_CERTIFICATE
586
587
def __del__(self):
588
gnutls.certificate_free_credentials(self._c_object)
589
590
class ClientSession(object):
591
def __init__(self, socket, credentials=None):
592
self._c_object = gnutls.session_t()
593
gnutls.init(ctypes.byref(self._c_object), gnutls.CLIENT)
594
gnutls.set_default_priority(self._c_object)
595
gnutls.transport_set_ptr(self._c_object, socket.fileno())
596
gnutls.handshake_set_private_extensions(self._c_object,
597
True)
598
self.socket = socket
599
if credentials is None:
600
credentials = gnutls.Credentials()
601
gnutls.credentials_set(self._c_object, credentials.type,
602
ctypes.cast(credentials._c_object,
603
ctypes.c_void_p))
604
self.credentials = credentials
605
606
def __del__(self):
607
gnutls.deinit(self._c_object)
608
609
def handshake(self):
610
return gnutls.handshake(self._c_object)
611
612
def send(self, data):
613
data = bytes(data)
614
data_len = len(data)
615
while data_len > 0:
616
data_len -= gnutls.record_send(self._c_object,
617
data[-data_len:],
618
data_len)
619
620
def bye(self):
621
return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
622
623
# Error handling functions
624
def _error_code(result):
625
"""A function to raise exceptions on errors, suitable
626
for the 'restype' attribute on ctypes functions"""
627
if result >= 0:
628
return result
629
if result == gnutls.E_NO_CERTIFICATE_FOUND:
630
raise gnutls.CertificateSecurityError(code=result)
631
raise gnutls.Error(code=result)
632
633
def _retry_on_error(result, func, arguments):
634
"""A function to retry on some errors, suitable
635
for the 'errcheck' attribute on ctypes functions"""
636
while result < 0:
637
if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
638
return _error_code(result)
639
result = func(*arguments)
640
return result
641
642
# Unless otherwise indicated, the function declarations below are
643
# all from the gnutls/gnutls.h C header file.
644
645
# Functions
646
priority_set_direct = _library.gnutls_priority_set_direct
647
priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
648
ctypes.POINTER(ctypes.c_char_p)]
649
priority_set_direct.restype = _error_code
650
651
init = _library.gnutls_init
652
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
653
init.restype = _error_code
654
655
set_default_priority = _library.gnutls_set_default_priority
656
set_default_priority.argtypes = [session_t]
657
set_default_priority.restype = _error_code
658
659
record_send = _library.gnutls_record_send
660
record_send.argtypes = [session_t, ctypes.c_void_p,
661
ctypes.c_size_t]
662
record_send.restype = ctypes.c_ssize_t
663
record_send.errcheck = _retry_on_error
664
665
certificate_allocate_credentials = (
666
_library.gnutls_certificate_allocate_credentials)
667
certificate_allocate_credentials.argtypes = [
668
ctypes.POINTER(certificate_credentials_t)]
669
certificate_allocate_credentials.restype = _error_code
670
671
certificate_free_credentials = (
672
_library.gnutls_certificate_free_credentials)
673
certificate_free_credentials.argtypes = [
674
certificate_credentials_t]
675
certificate_free_credentials.restype = None
676
677
handshake_set_private_extensions = (
678
_library.gnutls_handshake_set_private_extensions)
679
handshake_set_private_extensions.argtypes = [session_t,
680
ctypes.c_int]
681
handshake_set_private_extensions.restype = None
682
683
credentials_set = _library.gnutls_credentials_set
684
credentials_set.argtypes = [session_t, credentials_type_t,
685
ctypes.c_void_p]
686
credentials_set.restype = _error_code
687
688
strerror = _library.gnutls_strerror
689
strerror.argtypes = [ctypes.c_int]
690
strerror.restype = ctypes.c_char_p
691
692
certificate_type_get = _library.gnutls_certificate_type_get
693
certificate_type_get.argtypes = [session_t]
694
certificate_type_get.restype = _error_code
695
696
certificate_get_peers = _library.gnutls_certificate_get_peers
697
certificate_get_peers.argtypes = [session_t,
698
ctypes.POINTER(ctypes.c_uint)]
699
certificate_get_peers.restype = ctypes.POINTER(datum_t)
700
701
global_set_log_level = _library.gnutls_global_set_log_level
702
global_set_log_level.argtypes = [ctypes.c_int]
703
global_set_log_level.restype = None
704
705
global_set_log_function = _library.gnutls_global_set_log_function
706
global_set_log_function.argtypes = [log_func]
707
global_set_log_function.restype = None
708
709
deinit = _library.gnutls_deinit
710
deinit.argtypes = [session_t]
711
deinit.restype = None
712
713
handshake = _library.gnutls_handshake
714
handshake.argtypes = [session_t]
715
handshake.restype = _error_code
716
handshake.errcheck = _retry_on_error
717
718
transport_set_ptr = _library.gnutls_transport_set_ptr
719
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
720
transport_set_ptr.restype = None
721
722
bye = _library.gnutls_bye
723
bye.argtypes = [session_t, close_request_t]
724
bye.restype = _error_code
725
bye.errcheck = _retry_on_error
726
727
check_version = _library.gnutls_check_version
728
check_version.argtypes = [ctypes.c_char_p]
729
check_version.restype = ctypes.c_char_p
730
731
# All the function declarations below are from gnutls/openpgp.h
732
733
openpgp_crt_init = _library.gnutls_openpgp_crt_init
734
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
735
openpgp_crt_init.restype = _error_code
736
737
openpgp_crt_import = _library.gnutls_openpgp_crt_import
738
openpgp_crt_import.argtypes = [openpgp_crt_t,
739
ctypes.POINTER(datum_t),
740
openpgp_crt_fmt_t]
741
openpgp_crt_import.restype = _error_code
742
743
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
744
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
745
ctypes.POINTER(ctypes.c_uint)]
746
openpgp_crt_verify_self.restype = _error_code
747
748
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
749
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
750
openpgp_crt_deinit.restype = None
751
752
openpgp_crt_get_fingerprint = (
753
_library.gnutls_openpgp_crt_get_fingerprint)
754
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
755
ctypes.c_void_p,
756
ctypes.POINTER(
757
ctypes.c_size_t)]
758
openpgp_crt_get_fingerprint.restype = _error_code
759
760
# Remove non-public functions
761
del _error_code, _retry_on_error
762
# Create the global "gnutls" object, simulating a module
763
gnutls = GnuTLS()
764
765
766
def call_pipe(connection, # : multiprocessing.Connection
767
func, *args, **kwargs):
768
"""This function is meant to be called by multiprocessing.Process
769
770
This function runs func(*args, **kwargs), and writes the resulting
771
return value on the provided multiprocessing.Connection.
772
"""
773
connection.send(func(*args, **kwargs))
774
connection.close()
143
global group
144
if group is None:
145
group = dbus.Interface\
146
(bus.get_object(avahi.DBUS_NAME,
147
server.EntryGroupNew()),
148
avahi.DBUS_INTERFACE_ENTRY_GROUP)
149
group.connect_to_signal('StateChanged',
150
entry_group_state_changed)
151
logger.debug(u"Adding service '%s' of type '%s' ...",
152
service.name, service.type)
153
group.AddService(
154
self.interface, # interface
155
avahi.PROTO_INET6, # protocol
156
dbus.UInt32(0), # flags
157
self.name, self.type,
158
self.domain, self.host,
159
dbus.UInt16(self.port),
160
avahi.string_array_to_txt_array(self.TXT))
161
group.Commit()
162
163
# From the Avahi example code:
164
group = None # our entry group
165
# End of Avahi example code
775
166
776
167
777
168
class Client(object):
778
169
"""A representation of a client host served by this server.
779
780
170
Attributes:
781
approved: bool(); 'None' if not yet approved/disapproved
782
approval_delay: datetime.timedelta(); Time to wait for approval
783
approval_duration: datetime.timedelta(); Duration of one approval
784
checker: subprocess.Popen(); a running checker process used
785
to see if the client lives.
786
'None' if no process is running.
787
checker_callback_tag: a GLib event source tag, or None
788
checker_command: string; External command which is run to check
789
if client lives. %() expansions are done at
171
name: string; from the config file, used in log messages
172
fingerprint: string (40 or 32 hexadecimal digits); used to
173
uniquely identify the client
174
secret: bytestring; sent verbatim (over TLS) to client
175
host: string; available for use by the checker command
176
created: datetime.datetime(); object creation, not client host
177
last_checked_ok: datetime.datetime() or None if not yet checked OK
178
timeout: datetime.timedelta(); How long from last_checked_ok
179
until this client is invalid
180
interval: datetime.timedelta(); How often to start a new checker
181
stop_hook: If set, called by stop() as stop_hook(self)
182
checker: subprocess.Popen(); a running checker process used
183
to see if the client lives.
184
'None' if no process is running.
185
checker_initiator_tag: a gobject event source tag, or None
186
stop_initiator_tag: - '' -
187
checker_callback_tag: - '' -
188
checker_command: string; External command which is run to check if
189
client lives. %() expansions are done at
790
190
runtime with vars(self) as dict, so that for
791
191
instance %(name)s can be used in the command.
792
checker_initiator_tag: a GLib event source tag, or None
793
created: datetime.datetime(); (UTC) object creation
794
client_structure: Object describing what attributes a client has
795
and is used for storing the client at exit
796
current_checker_command: string; current running checker_command
797
disable_initiator_tag: a GLib event source tag, or None
798
enabled: bool()
799
fingerprint: string (40 or 32 hexadecimal digits); used to
800
uniquely identify the client
801
host: string; available for use by the checker command
802
interval: datetime.timedelta(); How often to start a new checker
803
last_approval_request: datetime.datetime(); (UTC) or None
804
last_checked_ok: datetime.datetime(); (UTC) or None
805
last_checker_status: integer between 0 and 255 reflecting exit
806
status of last checker. -1 reflects crashed
807
checker, -2 means no checker completed yet.
808
last_checker_signal: The signal which killed the last checker, if
809
last_checker_status is -1
810
last_enabled: datetime.datetime(); (UTC) or None
811
name: string; from the config file, used in log messages and
812
D-Bus identifiers
813
secret: bytestring; sent verbatim (over TLS) to client
814
timeout: datetime.timedelta(); How long from last_checked_ok
815
until this client is disabled
816
extended_timeout: extra long timeout when secret has been sent
817
runtime_expansions: Allowed attributes for runtime expansion.
818
expires: datetime.datetime(); time (UTC) when a client will be
819
disabled, or None
820
server_settings: The server_settings dict from main()
192
Private attibutes:
193
_timeout: Real variable for 'timeout'
194
_interval: Real variable for 'interval'
195
_timeout_milliseconds: Used when calling gobject.timeout_add()
196
_interval_milliseconds: - '' -
821
197
"""
822
823
runtime_expansions = ("approval_delay", "approval_duration",
824
"created", "enabled", "expires",
825
"fingerprint", "host", "interval",
826
"last_approval_request", "last_checked_ok",
827
"last_enabled", "name", "timeout")
828
client_defaults = {
829
"timeout": "PT5M",
830
"extended_timeout": "PT15M",
831
"interval": "PT2M",
832
"checker": "fping -q -- %%(host)s",
833
"host": "",
834
"approval_delay": "PT0S",
835
"approval_duration": "PT1S",
836
"approved_by_default": "True",
837
"enabled": "True",
838
}
839
840
@staticmethod
841
def config_parser(config):
842
"""Construct a new dict of client settings of this form:
843
{ client_name: {setting_name: value, ...}, ...}
844
with exceptions for any special settings as defined above.
845
NOTE: Must be a pure function. Must return the same result
846
value given the same arguments.
847
"""
848
settings = {}
849
for client_name in config.sections():
850
section = dict(config.items(client_name))
851
client = settings[client_name] = {}
852
853
client["host"] = section["host"]
854
# Reformat values from string types to Python types
855
client["approved_by_default"] = config.getboolean(
856
client_name, "approved_by_default")
857
client["enabled"] = config.getboolean(client_name,
858
"enabled")
859
860
# Uppercase and remove spaces from fingerprint for later
861
# comparison purposes with return value from the
862
# fingerprint() function
863
client["fingerprint"] = (section["fingerprint"].upper()
864
.replace(" ", ""))
865
if "secret" in section:
866
client["secret"] = codecs.decode(section["secret"]
867
.encode("utf-8"),
868
"base64")
869
elif "secfile" in section:
870
with open(os.path.expanduser(os.path.expandvars
871
(section["secfile"])),
872
"rb") as secfile:
873
client["secret"] = secfile.read()
874
else:
875
raise TypeError("No secret or secfile for section {}"
876
.format(section))
877
client["timeout"] = string_to_delta(section["timeout"])
878
client["extended_timeout"] = string_to_delta(
879
section["extended_timeout"])
880
client["interval"] = string_to_delta(section["interval"])
881
client["approval_delay"] = string_to_delta(
882
section["approval_delay"])
883
client["approval_duration"] = string_to_delta(
884
section["approval_duration"])
885
client["checker_command"] = section["checker"]
886
client["last_approval_request"] = None
887
client["last_checked_ok"] = None
888
client["last_checker_status"] = -2
889
890
return settings
891
892
def __init__(self, settings, name=None, server_settings=None):
198
def _set_timeout(self, timeout):
199
"Setter function for 'timeout' attribute"
200
self._timeout = timeout
201
self._timeout_milliseconds = ((self.timeout.days
202
* 24 * 60 * 60 * 1000)
203
+ (self.timeout.seconds * 1000)
204
+ (self.timeout.microseconds
205
// 1000))
206
timeout = property(lambda self: self._timeout,
207
_set_timeout)
208
del _set_timeout
209
def _set_interval(self, interval):
210
"Setter function for 'interval' attribute"
211
self._interval = interval
212
self._interval_milliseconds = ((self.interval.days
213
* 24 * 60 * 60 * 1000)
214
+ (self.interval.seconds
215
* 1000)
216
+ (self.interval.microseconds
217
// 1000))
218
interval = property(lambda self: self._interval,
219
_set_interval)
220
del _set_interval
221
def __init__(self, name = None, stop_hook=None, config={}):
222
"""Note: the 'checker' key in 'config' sets the
223
'checker_command' attribute and *not* the 'checker'
224
attribute."""
893
225
self.name = name
894
if server_settings is None:
895
server_settings = {}
896
self.server_settings = server_settings
897
# adding all client settings
898
for setting, value in settings.items():
899
setattr(self, setting, value)
900
901
if self.enabled:
902
if not hasattr(self, "last_enabled"):
903
self.last_enabled = datetime.datetime.utcnow()
904
if not hasattr(self, "expires"):
905
self.expires = (datetime.datetime.utcnow()
906
+ self.timeout)
226
logger.debug(u"Creating client %r", self.name)
227
# Uppercase and remove spaces from fingerprint for later
228
# comparison purposes with return value from the fingerprint()
229
# function
230
self.fingerprint = config["fingerprint"].upper()\
231
.replace(u" ", u"")
232
logger.debug(u" Fingerprint: %s", self.fingerprint)
233
if "secret" in config:
234
self.secret = config["secret"].decode(u"base64")
235
elif "secfile" in config:
236
sf = open(config["secfile"])
237
self.secret = sf.read()
238
sf.close()
907
239
else:
908
self.last_enabled = None
909
self.expires = None
910
911
logger.debug("Creating client %r", self.name)
912
logger.debug(" Fingerprint: %s", self.fingerprint)
913
self.created = settings.get("created",
914
datetime.datetime.utcnow())
915
916
# attributes specific for this server instance
240
raise TypeError(u"No secret or secfile for client %s"
241
% self.name)
242
self.host = config.get("host", "")
243
self.created = datetime.datetime.now()
244
self.last_checked_ok = None
245
self.timeout = string_to_delta(config["timeout"])
246
self.interval = string_to_delta(config["interval"])
247
self.stop_hook = stop_hook
917
248
self.checker = None
918
249
self.checker_initiator_tag = None
919
self.disable_initiator_tag = None
250
self.stop_initiator_tag = None
920
251
self.checker_callback_tag = None
921
self.current_checker_command = None
922
self.approved = None
923
self.approvals_pending = 0
924
self.changedstate = multiprocessing_manager.Condition(
925
multiprocessing_manager.Lock())
926
self.client_structure = [attr
927
for attr in self.__dict__.keys()
928
if not attr.startswith("_")]
929
self.client_structure.append("client_structure")
930
931
for name, t in inspect.getmembers(
932
type(self), lambda obj: isinstance(obj, property)):
933
if not name.startswith("_"):
934
self.client_structure.append(name)
935
936
# Send notice to process children that client state has changed
937
def send_changedstate(self):
938
with self.changedstate:
939
self.changedstate.notify_all()
940
941
def enable(self):
252
self.check_command = config["checker"]
253
def start(self):
942
254
"""Start this client's checker and timeout hooks"""
943
if getattr(self, "enabled", False):
944
# Already enabled
945
return
946
self.expires = datetime.datetime.utcnow() + self.timeout
947
self.enabled = True
948
self.last_enabled = datetime.datetime.utcnow()
949
self.init_checker()
950
self.send_changedstate()
951
952
def disable(self, quiet=True):
953
"""Disable this client."""
954
if not getattr(self, "enabled", False):
955
return False
956
if not quiet:
957
logger.info("Disabling client %s", self.name)
958
if getattr(self, "disable_initiator_tag", None) is not None:
959
GLib.source_remove(self.disable_initiator_tag)
960
self.disable_initiator_tag = None
961
self.expires = None
962
if getattr(self, "checker_initiator_tag", None) is not None:
963
GLib.source_remove(self.checker_initiator_tag)
964
self.checker_initiator_tag = None
965
self.stop_checker()
966
self.enabled = False
967
if not quiet:
968
self.send_changedstate()
969
# Do not run this again if called by a GLib.timeout_add
970
return False
971
972
def __del__(self):
973
self.disable()
974
975
def init_checker(self):
976
255
# Schedule a new checker to be started an 'interval' from now,
977
256
# and every interval from then on.
978
if self.checker_initiator_tag is not None:
979
GLib.source_remove(self.checker_initiator_tag)
980
self.checker_initiator_tag = GLib.timeout_add(
981
int(self.interval.total_seconds() * 1000),
982
self.start_checker)
983
# Schedule a disable() when 'timeout' has passed
984
if self.disable_initiator_tag is not None:
985
GLib.source_remove(self.disable_initiator_tag)
986
self.disable_initiator_tag = GLib.timeout_add(
987
int(self.timeout.total_seconds() * 1000), self.disable)
257
self.checker_initiator_tag = gobject.timeout_add\
258
(self._interval_milliseconds,
259
self.start_checker)
988
260
# Also start a new checker *right now*.
989
261
self.start_checker()
990
991
def checker_callback(self, source, condition, connection,
992
command):
262
# Schedule a stop() when 'timeout' has passed
263
self.stop_initiator_tag = gobject.timeout_add\
264
(self._timeout_milliseconds,
265
self.stop)
266
def stop(self):
267
"""Stop this client.
268
The possibility that a client might be restarted is left open,
269
but not currently used."""
270
# If this client doesn't have a secret, it is already stopped.
271
if hasattr(self, "secret") and self.secret:
272
logger.info(u"Stopping client %s", self.name)
273
self.secret = None
274
else:
275
return False
276
if getattr(self, "stop_initiator_tag", False):
277
gobject.source_remove(self.stop_initiator_tag)
278
self.stop_initiator_tag = None
279
if getattr(self, "checker_initiator_tag", False):
280
gobject.source_remove(self.checker_initiator_tag)
281
self.checker_initiator_tag = None
282
self.stop_checker()
283
if self.stop_hook:
284
self.stop_hook(self)
285
# Do not run this again if called by a gobject.timeout_add
286
return False
287
def __del__(self):
288
self.stop_hook = None
289
self.stop()
290
def checker_callback(self, pid, condition):
993
291
"""The checker has completed, so take appropriate actions."""
292
now = datetime.datetime.now()
994
293
self.checker_callback_tag = None
995
294
self.checker = None
996
# Read return code from connection (see call_pipe)
997
returncode = connection.recv()
998
connection.close()
999
1000
if returncode >= 0:
1001
self.last_checker_status = returncode
1002
self.last_checker_signal = None
1003
if self.last_checker_status == 0:
1004
logger.info("Checker for %(name)s succeeded",
1005
vars(self))
1006
self.checked_ok()
1007
else:
1008
logger.info("Checker for %(name)s failed", vars(self))
1009
else:
1010
self.last_checker_status = -1
1011
self.last_checker_signal = -returncode
1012
logger.warning("Checker for %(name)s crashed?",
295
if os.WIFEXITED(condition) \
296
and (os.WEXITSTATUS(condition) == 0):
297
logger.info(u"Checker for %(name)s succeeded",
298
vars(self))
299
self.last_checked_ok = now
300
gobject.source_remove(self.stop_initiator_tag)
301
self.stop_initiator_tag = gobject.timeout_add\
302
(self._timeout_milliseconds,
303
self.stop)
304
elif not os.WIFEXITED(condition):
305
logger.warning(u"Checker for %(name)s crashed?",
1013
306
vars(self))
1014
return False
1015
1016
def checked_ok(self):
1017
"""Assert that the client has been seen, alive and well."""
1018
self.last_checked_ok = datetime.datetime.utcnow()
1019
self.last_checker_status = 0
1020
self.last_checker_signal = None
1021
self.bump_timeout()
1022
1023
def bump_timeout(self, timeout=None):
1024
"""Bump up the timeout for this client."""
1025
if timeout is None:
1026
timeout = self.timeout
1027
if self.disable_initiator_tag is not None:
1028
GLib.source_remove(self.disable_initiator_tag)
1029
self.disable_initiator_tag = None
1030
if getattr(self, "enabled", False):
1031
self.disable_initiator_tag = GLib.timeout_add(
1032
int(timeout.total_seconds() * 1000), self.disable)
1033
self.expires = datetime.datetime.utcnow() + timeout
1034
1035
def need_approval(self):
1036
self.last_approval_request = datetime.datetime.utcnow()
1037
307
else:
308
logger.info(u"Checker for %(name)s failed",
309
vars(self))
1038
310
def start_checker(self):
1039
311
"""Start a new checker subprocess if one is not running.
1040
1041
312
If a checker already exists, leave it running and do
1042
313
nothing."""
1043
314
# The reason for not killing a running checker is that if we
1044
# did that, and if a checker (for some reason) started running
1045
# slowly and taking more than 'interval' time, then the client
1046
# would inevitably timeout, since no checker would get a
1047
# chance to run to completion. If we instead leave running
315
# did that, then if a checker (for some reason) started
316
# running slowly and taking more than 'interval' time, the
317
# client would inevitably timeout, since no checker would get
318
# a chance to run to completion. If we instead leave running
1048
319
# checkers alone, the checker would have to take more time
1049
# than 'timeout' for the client to be disabled, which is as it
1050
# should be.
1051
1052
if self.checker is not None and not self.checker.is_alive():
1053
logger.warning("Checker was not alive; joining")
1054
self.checker.join()
1055
self.checker = None
1056
# Start a new checker if needed
320
# than 'timeout' for the client to be declared invalid, which
321
# is as it should be.
1057
322
if self.checker is None:
1058
# Escape attributes for the shell
1059
escaped_attrs = {
1060
attr: re.escape(str(getattr(self, attr)))
1061
for attr in self.runtime_expansions}
1062
try:
1063
command = self.checker_command % escaped_attrs
1064
except TypeError as error:
1065
logger.error('Could not format string "%s"',
1066
self.checker_command,
1067
exc_info=error)
1068
return True # Try again later
1069
self.current_checker_command = command
1070
logger.info("Starting checker %r for %s", command,
1071
self.name)
1072
# We don't need to redirect stdout and stderr, since
1073
# in normal mode, that is already done by daemon(),
1074
# and in debug mode we don't want to. (Stdin is
1075
# always replaced by /dev/null.)
1076
# The exception is when not debugging but nevertheless
1077
# running in the foreground; use the previously
1078
# created wnull.
1079
popen_args = {"close_fds": True,
1080
"shell": True,
1081
"cwd": "/"}
1082
if (not self.server_settings["debug"]
1083
and self.server_settings["foreground"]):
1084
popen_args.update({"stdout": wnull,
1085
"stderr": wnull})
1086
pipe = multiprocessing.Pipe(duplex=False)
1087
self.checker = multiprocessing.Process(
1088
target=call_pipe,
1089
args=(pipe[1], subprocess.call, command),
1090
kwargs=popen_args)
1091
self.checker.start()
1092
self.checker_callback_tag = GLib.io_add_watch(
1093
pipe[0].fileno(), GLib.IO_IN,
1094
self.checker_callback, pipe[0], command)
1095
# Re-run this periodically if run by GLib.timeout_add
323
try:
324
# In case check_command has exactly one % operator
325
command = self.check_command % self.host
326
except TypeError:
327
# Escape attributes for the shell
328
escaped_attrs = dict((key, re.escape(str(val)))
329
for key, val in
330
vars(self).iteritems())
331
try:
332
command = self.check_command % escaped_attrs
333
except TypeError, error:
334
logger.error(u'Could not format string "%s":'
335
u' %s', self.check_command, error)
336
return True # Try again later
337
try:
338
logger.info(u"Starting checker %r for %s",
339
command, self.name)
340
self.checker = subprocess.Popen(command,
341
close_fds=True,
342
shell=True, cwd="/")
343
self.checker_callback_tag = gobject.child_watch_add\
344
(self.checker.pid,
345
self.checker_callback)
346
except subprocess.OSError, error:
347
logger.error(u"Failed to start subprocess: %s",
348
error)
349
# Re-run this periodically if run by gobject.timeout_add
1096
350
return True
1097
1098
351
def stop_checker(self):
1099
352
"""Force the checker process, if any, to stop."""
1100
353
if self.checker_callback_tag:
1101
GLib.source_remove(self.checker_callback_tag)
354
gobject.source_remove(self.checker_callback_tag)
1102
355
self.checker_callback_tag = None
1103
356
if getattr(self, "checker", None) is None:
1104
357
return
1105
logger.debug("Stopping checker for %(name)s", vars(self))
1106
self.checker.terminate()
358
logger.debug(u"Stopping checker for %(name)s", vars(self))
359
try:
360
os.kill(self.checker.pid, signal.SIGTERM)
361
#os.sleep(0.5)
362
#if self.checker.poll() is None:
363
# os.kill(self.checker.pid, signal.SIGKILL)
364
except OSError, error:
365
if error.errno != errno.ESRCH: # No such process
366
raise
1107
367
self.checker = None
1108
1109
1110
def dbus_service_property(dbus_interface,
1111
signature="v",
1112
access="readwrite",
1113
byte_arrays=False):
1114
"""Decorators for marking methods of a DBusObjectWithProperties to
1115
become properties on the D-Bus.
1116
1117
The decorated method will be called with no arguments by "Get"
1118
and with one argument by "Set".
1119
1120
The parameters, where they are supported, are the same as
1121
dbus.service.method, except there is only "signature", since the
1122
type from Get() and the type sent to Set() is the same.
1123
"""
1124
# Encoding deeply encoded byte arrays is not supported yet by the
1125
# "Set" method, so we fail early here:
1126
if byte_arrays and signature != "ay":
1127
raise ValueError("Byte arrays not supported for non-'ay'"
1128
" signature {!r}".format(signature))
1129
1130
def decorator(func):
1131
func._dbus_is_property = True
1132
func._dbus_interface = dbus_interface
1133
func._dbus_signature = signature
1134
func._dbus_access = access
1135
func._dbus_name = func.__name__
1136
if func._dbus_name.endswith("_dbus_property"):
1137
func._dbus_name = func._dbus_name[:-14]
1138
func._dbus_get_args_options = {'byte_arrays': byte_arrays}
1139
return func
1140
1141
return decorator
1142
1143
1144
def dbus_interface_annotations(dbus_interface):
1145
"""Decorator for marking functions returning interface annotations
1146
1147
Usage:
1148
1149
@dbus_interface_annotations("org.example.Interface")
1150
def _foo(self): # Function name does not matter
1151
return {"org.freedesktop.DBus.Deprecated": "true",
1152
"org.freedesktop.DBus.Property.EmitsChangedSignal":
1153
"false"}
1154
"""
1155
1156
def decorator(func):
1157
func._dbus_is_interface = True
1158
func._dbus_interface = dbus_interface
1159
func._dbus_name = dbus_interface
1160
return func
1161
1162
return decorator
1163
1164
1165
def dbus_annotations(annotations):
1166
"""Decorator to annotate D-Bus methods, signals or properties
1167
Usage:
1168
1169
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
1170
"org.freedesktop.DBus.Property."
1171
"EmitsChangedSignal": "false"})
1172
@dbus_service_property("org.example.Interface", signature="b",
1173
access="r")
1174
def Property_dbus_property(self):
1175
return dbus.Boolean(False)
1176
1177
See also the DBusObjectWithAnnotations class.
1178
"""
1179
1180
def decorator(func):
1181
func._dbus_annotations = annotations
1182
return func
1183
1184
return decorator
1185
1186
1187
class DBusPropertyException(dbus.exceptions.DBusException):
1188
"""A base class for D-Bus property-related exceptions
1189
"""
1190
pass
1191
1192
1193
class DBusPropertyAccessException(DBusPropertyException):
1194
"""A property's access permissions disallows an operation.
1195
"""
1196
pass
1197
1198
1199
class DBusPropertyNotFound(DBusPropertyException):
1200
"""An attempt was made to access a non-existing property.
1201
"""
1202
pass
1203
1204
1205
class DBusObjectWithAnnotations(dbus.service.Object):
1206
"""A D-Bus object with annotations.
1207
1208
Classes inheriting from this can use the dbus_annotations
1209
decorator to add annotations to methods or signals.
1210
"""
1211
1212
@staticmethod
1213
def _is_dbus_thing(thing):
1214
"""Returns a function testing if an attribute is a D-Bus thing
1215
1216
If called like _is_dbus_thing("method") it returns a function
1217
suitable for use as predicate to inspect.getmembers().
1218
"""
1219
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
1220
False)
1221
1222
def _get_all_dbus_things(self, thing):
1223
"""Returns a generator of (name, attribute) pairs
1224
"""
1225
return ((getattr(athing.__get__(self), "_dbus_name", name),
1226
athing.__get__(self))
1227
for cls in self.__class__.__mro__
1228
for name, athing in
1229
inspect.getmembers(cls, self._is_dbus_thing(thing)))
1230
1231
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1232
out_signature="s",
1233
path_keyword='object_path',
1234
connection_keyword='connection')
1235
def Introspect(self, object_path, connection):
1236
"""Overloading of standard D-Bus method.
1237
1238
Inserts annotation tags on methods and signals.
1239
"""
1240
xmlstring = dbus.service.Object.Introspect(self, object_path,
1241
connection)
1242
try:
1243
document = xml.dom.minidom.parseString(xmlstring)
1244
1245
for if_tag in document.getElementsByTagName("interface"):
1246
# Add annotation tags
1247
for typ in ("method", "signal"):
1248
for tag in if_tag.getElementsByTagName(typ):
1249
annots = dict()
1250
for name, prop in (self.
1251
_get_all_dbus_things(typ)):
1252
if (name == tag.getAttribute("name")
1253
and prop._dbus_interface
1254
== if_tag.getAttribute("name")):
1255
annots.update(getattr(
1256
prop, "_dbus_annotations", {}))
1257
for name, value in annots.items():
1258
ann_tag = document.createElement(
1259
"annotation")
1260
ann_tag.setAttribute("name", name)
1261
ann_tag.setAttribute("value", value)
1262
tag.appendChild(ann_tag)
1263
# Add interface annotation tags
1264
for annotation, value in dict(
1265
itertools.chain.from_iterable(
1266
annotations().items()
1267
for name, annotations
1268
in self._get_all_dbus_things("interface")
1269
if name == if_tag.getAttribute("name")
1270
)).items():
1271
ann_tag = document.createElement("annotation")
1272
ann_tag.setAttribute("name", annotation)
1273
ann_tag.setAttribute("value", value)
1274
if_tag.appendChild(ann_tag)
1275
# Fix argument name for the Introspect method itself
1276
if (if_tag.getAttribute("name")
1277
== dbus.INTROSPECTABLE_IFACE):
1278
for cn in if_tag.getElementsByTagName("method"):
1279
if cn.getAttribute("name") == "Introspect":
1280
for arg in cn.getElementsByTagName("arg"):
1281
if (arg.getAttribute("direction")
1282
== "out"):
1283
arg.setAttribute("name",
1284
"xml_data")
1285
xmlstring = document.toxml("utf-8")
1286
document.unlink()
1287
except (AttributeError, xml.dom.DOMException,
1288
xml.parsers.expat.ExpatError) as error:
1289
logger.error("Failed to override Introspection method",
1290
exc_info=error)
1291
return xmlstring
1292
1293
1294
class DBusObjectWithProperties(DBusObjectWithAnnotations):
1295
"""A D-Bus object with properties.
1296
1297
Classes inheriting from this can use the dbus_service_property
1298
decorator to expose methods as D-Bus properties. It exposes the
1299
standard Get(), Set(), and GetAll() methods on the D-Bus.
1300
"""
1301
1302
def _get_dbus_property(self, interface_name, property_name):
1303
"""Returns a bound method if one exists which is a D-Bus
1304
property with the specified name and interface.
1305
"""
1306
for cls in self.__class__.__mro__:
1307
for name, value in inspect.getmembers(
1308
cls, self._is_dbus_thing("property")):
1309
if (value._dbus_name == property_name
1310
and value._dbus_interface == interface_name):
1311
return value.__get__(self)
1312
1313
# No such property
1314
raise DBusPropertyNotFound("{}:{}.{}".format(
1315
self.dbus_object_path, interface_name, property_name))
1316
1317
@classmethod
1318
def _get_all_interface_names(cls):
1319
"""Get a sequence of all interfaces supported by an object"""
1320
return (name for name in set(getattr(getattr(x, attr),
1321
"_dbus_interface", None)
1322
for x in (inspect.getmro(cls))
1323
for attr in dir(x))
1324
if name is not None)
1325
1326
@dbus.service.method(dbus.PROPERTIES_IFACE,
1327
in_signature="ss",
1328
out_signature="v")
1329
def Get(self, interface_name, property_name):
1330
"""Standard D-Bus property Get() method, see D-Bus standard.
1331
"""
1332
prop = self._get_dbus_property(interface_name, property_name)
1333
if prop._dbus_access == "write":
1334
raise DBusPropertyAccessException(property_name)
1335
value = prop()
1336
if not hasattr(value, "variant_level"):
1337
return value
1338
return type(value)(value, variant_level=value.variant_level+1)
1339
1340
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
1341
def Set(self, interface_name, property_name, value):
1342
"""Standard D-Bus property Set() method, see D-Bus standard.
1343
"""
1344
prop = self._get_dbus_property(interface_name, property_name)
1345
if prop._dbus_access == "read":
1346
raise DBusPropertyAccessException(property_name)
1347
if prop._dbus_get_args_options["byte_arrays"]:
1348
# The byte_arrays option is not supported yet on
1349
# signatures other than "ay".
1350
if prop._dbus_signature != "ay":
1351
raise ValueError("Byte arrays not supported for non-"
1352
"'ay' signature {!r}"
1353
.format(prop._dbus_signature))
1354
value = dbus.ByteArray(b''.join(chr(byte)
1355
for byte in value))
1356
prop(value)
1357
1358
@dbus.service.method(dbus.PROPERTIES_IFACE,
1359
in_signature="s",
1360
out_signature="a{sv}")
1361
def GetAll(self, interface_name):
1362
"""Standard D-Bus property GetAll() method, see D-Bus
1363
standard.
1364
1365
Note: Will not include properties with access="write".
1366
"""
1367
properties = {}
1368
for name, prop in self._get_all_dbus_things("property"):
1369
if (interface_name
1370
and interface_name != prop._dbus_interface):
1371
# Interface non-empty but did not match
1372
continue
1373
# Ignore write-only properties
1374
if prop._dbus_access == "write":
1375
continue
1376
value = prop()
1377
if not hasattr(value, "variant_level"):
1378
properties[name] = value
1379
continue
1380
properties[name] = type(value)(
1381
value, variant_level=value.variant_level + 1)
1382
return dbus.Dictionary(properties, signature="sv")
1383
1384
@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
1385
def PropertiesChanged(self, interface_name, changed_properties,
1386
invalidated_properties):
1387
"""Standard D-Bus PropertiesChanged() signal, see D-Bus
1388
standard.
1389
"""
1390
pass
1391
1392
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1393
out_signature="s",
1394
path_keyword='object_path',
1395
connection_keyword='connection')
1396
def Introspect(self, object_path, connection):
1397
"""Overloading of standard D-Bus method.
1398
1399
Inserts property tags and interface annotation tags.
1400
"""
1401
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1402
object_path,
1403
connection)
1404
try:
1405
document = xml.dom.minidom.parseString(xmlstring)
1406
1407
def make_tag(document, name, prop):
1408
e = document.createElement("property")
1409
e.setAttribute("name", name)
1410
e.setAttribute("type", prop._dbus_signature)
1411
e.setAttribute("access", prop._dbus_access)
1412
return e
1413
1414
for if_tag in document.getElementsByTagName("interface"):
1415
# Add property tags
1416
for tag in (make_tag(document, name, prop)
1417
for name, prop
1418
in self._get_all_dbus_things("property")
1419
if prop._dbus_interface
1420
== if_tag.getAttribute("name")):
1421
if_tag.appendChild(tag)
1422
# Add annotation tags for properties
1423
for tag in if_tag.getElementsByTagName("property"):
1424
annots = dict()
1425
for name, prop in self._get_all_dbus_things(
1426
"property"):
1427
if (name == tag.getAttribute("name")
1428
and prop._dbus_interface
1429
== if_tag.getAttribute("name")):
1430
annots.update(getattr(
1431
prop, "_dbus_annotations", {}))
1432
for name, value in annots.items():
1433
ann_tag = document.createElement(
1434
"annotation")
1435
ann_tag.setAttribute("name", name)
1436
ann_tag.setAttribute("value", value)
1437
tag.appendChild(ann_tag)
1438
# Add the names to the return values for the
1439
# "org.freedesktop.DBus.Properties" methods
1440
if (if_tag.getAttribute("name")
1441
== "org.freedesktop.DBus.Properties"):
1442
for cn in if_tag.getElementsByTagName("method"):
1443
if cn.getAttribute("name") == "Get":
1444
for arg in cn.getElementsByTagName("arg"):
1445
if (arg.getAttribute("direction")
1446
== "out"):
1447
arg.setAttribute("name", "value")
1448
elif cn.getAttribute("name") == "GetAll":
1449
for arg in cn.getElementsByTagName("arg"):
1450
if (arg.getAttribute("direction")
1451
== "out"):
1452
arg.setAttribute("name", "props")
1453
xmlstring = document.toxml("utf-8")
1454
document.unlink()
1455
except (AttributeError, xml.dom.DOMException,
1456
xml.parsers.expat.ExpatError) as error:
1457
logger.error("Failed to override Introspection method",
1458
exc_info=error)
1459
return xmlstring
1460
1461
try:
1462
dbus.OBJECT_MANAGER_IFACE
1463
except AttributeError:
1464
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1465
1466
1467
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1468
"""A D-Bus object with an ObjectManager.
1469
1470
Classes inheriting from this exposes the standard
1471
GetManagedObjects call and the InterfacesAdded and
1472
InterfacesRemoved signals on the standard
1473
"org.freedesktop.DBus.ObjectManager" interface.
1474
1475
Note: No signals are sent automatically; they must be sent
1476
manually.
1477
"""
1478
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1479
out_signature="a{oa{sa{sv}}}")
1480
def GetManagedObjects(self):
1481
"""This function must be overridden"""
1482
raise NotImplementedError()
1483
1484
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1485
signature="oa{sa{sv}}")
1486
def InterfacesAdded(self, object_path, interfaces_and_properties):
1487
pass
1488
1489
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1490
def InterfacesRemoved(self, object_path, interfaces):
1491
pass
1492
1493
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1494
out_signature="s",
1495
path_keyword='object_path',
1496
connection_keyword='connection')
1497
def Introspect(self, object_path, connection):
1498
"""Overloading of standard D-Bus method.
1499
1500
Override return argument name of GetManagedObjects to be
1501
"objpath_interfaces_and_properties"
1502
"""
1503
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1504
object_path,
1505
connection)
1506
try:
1507
document = xml.dom.minidom.parseString(xmlstring)
1508
1509
for if_tag in document.getElementsByTagName("interface"):
1510
# Fix argument name for the GetManagedObjects method
1511
if (if_tag.getAttribute("name")
1512
== dbus.OBJECT_MANAGER_IFACE):
1513
for cn in if_tag.getElementsByTagName("method"):
1514
if (cn.getAttribute("name")
1515
== "GetManagedObjects"):
1516
for arg in cn.getElementsByTagName("arg"):
1517
if (arg.getAttribute("direction")
1518
== "out"):
1519
arg.setAttribute(
1520
"name",
1521
"objpath_interfaces"
1522
"_and_properties")
1523
xmlstring = document.toxml("utf-8")
1524
document.unlink()
1525
except (AttributeError, xml.dom.DOMException,
1526
xml.parsers.expat.ExpatError) as error:
1527
logger.error("Failed to override Introspection method",
1528
exc_info=error)
1529
return xmlstring
1530
1531
1532
def datetime_to_dbus(dt, variant_level=0):
1533
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1534
if dt is None:
1535
return dbus.String("", variant_level=variant_level)
1536
return dbus.String(dt.isoformat(), variant_level=variant_level)
1537
1538
1539
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1540
"""A class decorator; applied to a subclass of
1541
dbus.service.Object, it will add alternate D-Bus attributes with
1542
interface names according to the "alt_interface_names" mapping.
1543
Usage:
1544
1545
@alternate_dbus_interfaces({"org.example.Interface":
1546
"net.example.AlternateInterface"})
1547
class SampleDBusObject(dbus.service.Object):
1548
@dbus.service.method("org.example.Interface")
1549
def SampleDBusMethod():
1550
pass
1551
1552
The above "SampleDBusMethod" on "SampleDBusObject" will be
1553
reachable via two interfaces: "org.example.Interface" and
1554
"net.example.AlternateInterface", the latter of which will have
1555
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1556
"true", unless "deprecate" is passed with a False value.
1557
1558
This works for methods and signals, and also for D-Bus properties
1559
(from DBusObjectWithProperties) and interfaces (from the
1560
dbus_interface_annotations decorator).
1561
"""
1562
1563
def wrapper(cls):
1564
for orig_interface_name, alt_interface_name in (
1565
alt_interface_names.items()):
1566
attr = {}
1567
interface_names = set()
1568
# Go though all attributes of the class
1569
for attrname, attribute in inspect.getmembers(cls):
1570
# Ignore non-D-Bus attributes, and D-Bus attributes
1571
# with the wrong interface name
1572
if (not hasattr(attribute, "_dbus_interface")
1573
or not attribute._dbus_interface.startswith(
1574
orig_interface_name)):
1575
continue
1576
# Create an alternate D-Bus interface name based on
1577
# the current name
1578
alt_interface = attribute._dbus_interface.replace(
1579
orig_interface_name, alt_interface_name)
1580
interface_names.add(alt_interface)
1581
# Is this a D-Bus signal?
1582
if getattr(attribute, "_dbus_is_signal", False):
1583
# Extract the original non-method undecorated
1584
# function by black magic
1585
if sys.version_info.major == 2:
1586
nonmethod_func = (dict(
1587
zip(attribute.func_code.co_freevars,
1588
attribute.__closure__))
1589
["func"].cell_contents)
1590
else:
1591
nonmethod_func = (dict(
1592
zip(attribute.__code__.co_freevars,
1593
attribute.__closure__))
1594
["func"].cell_contents)
1595
# Create a new, but exactly alike, function
1596
# object, and decorate it to be a new D-Bus signal
1597
# with the alternate D-Bus interface name
1598
new_function = copy_function(nonmethod_func)
1599
new_function = (dbus.service.signal(
1600
alt_interface,
1601
attribute._dbus_signature)(new_function))
1602
# Copy annotations, if any
1603
try:
1604
new_function._dbus_annotations = dict(
1605
attribute._dbus_annotations)
1606
except AttributeError:
1607
pass
1608
1609
# Define a creator of a function to call both the
1610
# original and alternate functions, so both the
1611
# original and alternate signals gets sent when
1612
# the function is called
1613
def fixscope(func1, func2):
1614
"""This function is a scope container to pass
1615
func1 and func2 to the "call_both" function
1616
outside of its arguments"""
1617
1618
@functools.wraps(func2)
1619
def call_both(*args, **kwargs):
1620
"""This function will emit two D-Bus
1621
signals by calling func1 and func2"""
1622
func1(*args, **kwargs)
1623
func2(*args, **kwargs)
1624
# Make wrapper function look like a D-Bus
1625
# signal
1626
for name, attr in inspect.getmembers(func2):
1627
if name.startswith("_dbus_"):
1628
setattr(call_both, name, attr)
1629
1630
return call_both
1631
# Create the "call_both" function and add it to
1632
# the class
1633
attr[attrname] = fixscope(attribute, new_function)
1634
# Is this a D-Bus method?
1635
elif getattr(attribute, "_dbus_is_method", False):
1636
# Create a new, but exactly alike, function
1637
# object. Decorate it to be a new D-Bus method
1638
# with the alternate D-Bus interface name. Add it
1639
# to the class.
1640
attr[attrname] = (
1641
dbus.service.method(
1642
alt_interface,
1643
attribute._dbus_in_signature,
1644
attribute._dbus_out_signature)
1645
(copy_function(attribute)))
1646
# Copy annotations, if any
1647
try:
1648
attr[attrname]._dbus_annotations = dict(
1649
attribute._dbus_annotations)
1650
except AttributeError:
1651
pass
1652
# Is this a D-Bus property?
1653
elif getattr(attribute, "_dbus_is_property", False):
1654
# Create a new, but exactly alike, function
1655
# object, and decorate it to be a new D-Bus
1656
# property with the alternate D-Bus interface
1657
# name. Add it to the class.
1658
attr[attrname] = (dbus_service_property(
1659
alt_interface, attribute._dbus_signature,
1660
attribute._dbus_access,
1661
attribute._dbus_get_args_options
1662
["byte_arrays"])
1663
(copy_function(attribute)))
1664
# Copy annotations, if any
1665
try:
1666
attr[attrname]._dbus_annotations = dict(
1667
attribute._dbus_annotations)
1668
except AttributeError:
1669
pass
1670
# Is this a D-Bus interface?
1671
elif getattr(attribute, "_dbus_is_interface", False):
1672
# Create a new, but exactly alike, function
1673
# object. Decorate it to be a new D-Bus interface
1674
# with the alternate D-Bus interface name. Add it
1675
# to the class.
1676
attr[attrname] = (
1677
dbus_interface_annotations(alt_interface)
1678
(copy_function(attribute)))
1679
if deprecate:
1680
# Deprecate all alternate interfaces
1681
iname = "_AlternateDBusNames_interface_annotation{}"
1682
for interface_name in interface_names:
1683
1684
@dbus_interface_annotations(interface_name)
1685
def func(self):
1686
return {"org.freedesktop.DBus.Deprecated":
1687
"true"}
1688
# Find an unused name
1689
for aname in (iname.format(i)
1690
for i in itertools.count()):
1691
if aname not in attr:
1692
attr[aname] = func
1693
break
1694
if interface_names:
1695
# Replace the class with a new subclass of it with
1696
# methods, signals, etc. as created above.
1697
if sys.version_info.major == 2:
1698
cls = type(b"{}Alternate".format(cls.__name__),
1699
(cls, ), attr)
1700
else:
1701
cls = type("{}Alternate".format(cls.__name__),
1702
(cls, ), attr)
1703
return cls
1704
1705
return wrapper
1706
1707
1708
@alternate_dbus_interfaces({"se.recompile.Mandos":
1709
"se.bsnet.fukt.Mandos"})
1710
class ClientDBus(Client, DBusObjectWithProperties):
1711
"""A Client class using D-Bus
1712
1713
Attributes:
1714
dbus_object_path: dbus.ObjectPath
1715
bus: dbus.SystemBus()
1716
"""
1717
1718
runtime_expansions = (Client.runtime_expansions
1719
+ ("dbus_object_path", ))
1720
1721
_interface = "se.recompile.Mandos.Client"
1722
1723
# dbus.service.Object doesn't use super(), so we can't either.
1724
1725
def __init__(self, bus=None, *args, **kwargs):
1726
self.bus = bus
1727
Client.__init__(self, *args, **kwargs)
1728
# Only now, when this client is initialized, can it show up on
1729
# the D-Bus
1730
client_object_name = str(self.name).translate(
1731
{ord("."): ord("_"),
1732
ord("-"): ord("_")})
1733
self.dbus_object_path = dbus.ObjectPath(
1734
"/clients/" + client_object_name)
1735
DBusObjectWithProperties.__init__(self, self.bus,
1736
self.dbus_object_path)
1737
1738
def notifychangeproperty(transform_func, dbus_name,
1739
type_func=lambda x: x,
1740
variant_level=1,
1741
invalidate_only=False,
1742
_interface=_interface):
1743
""" Modify a variable so that it's a property which announces
1744
its changes to DBus.
1745
1746
transform_fun: Function that takes a value and a variant_level
1747
and transforms it to a D-Bus type.
1748
dbus_name: D-Bus name of the variable
1749
type_func: Function that transform the value before sending it
1750
to the D-Bus. Default: no transform
1751
variant_level: D-Bus variant level. Default: 1
1752
"""
1753
attrname = "_{}".format(dbus_name)
1754
1755
def setter(self, value):
1756
if hasattr(self, "dbus_object_path"):
1757
if (not hasattr(self, attrname) or
1758
type_func(getattr(self, attrname, None))
1759
!= type_func(value)):
1760
if invalidate_only:
1761
self.PropertiesChanged(
1762
_interface, dbus.Dictionary(),
1763
dbus.Array((dbus_name, )))
1764
else:
1765
dbus_value = transform_func(
1766
type_func(value),
1767
variant_level=variant_level)
1768
self.PropertyChanged(dbus.String(dbus_name),
1769
dbus_value)
1770
self.PropertiesChanged(
1771
_interface,
1772
dbus.Dictionary({dbus.String(dbus_name):
1773
dbus_value}),
1774
dbus.Array())
1775
setattr(self, attrname, value)
1776
1777
return property(lambda self: getattr(self, attrname), setter)
1778
1779
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1780
approvals_pending = notifychangeproperty(dbus.Boolean,
1781
"ApprovalPending",
1782
type_func=bool)
1783
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1784
last_enabled = notifychangeproperty(datetime_to_dbus,
1785
"LastEnabled")
1786
checker = notifychangeproperty(
1787
dbus.Boolean, "CheckerRunning",
1788
type_func=lambda checker: checker is not None)
1789
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1790
"LastCheckedOK")
1791
last_checker_status = notifychangeproperty(dbus.Int16,
1792
"LastCheckerStatus")
1793
last_approval_request = notifychangeproperty(
1794
datetime_to_dbus, "LastApprovalRequest")
1795
approved_by_default = notifychangeproperty(dbus.Boolean,
1796
"ApprovedByDefault")
1797
approval_delay = notifychangeproperty(
1798
dbus.UInt64, "ApprovalDelay",
1799
type_func=lambda td: td.total_seconds() * 1000)
1800
approval_duration = notifychangeproperty(
1801
dbus.UInt64, "ApprovalDuration",
1802
type_func=lambda td: td.total_seconds() * 1000)
1803
host = notifychangeproperty(dbus.String, "Host")
1804
timeout = notifychangeproperty(
1805
dbus.UInt64, "Timeout",
1806
type_func=lambda td: td.total_seconds() * 1000)
1807
extended_timeout = notifychangeproperty(
1808
dbus.UInt64, "ExtendedTimeout",
1809
type_func=lambda td: td.total_seconds() * 1000)
1810
interval = notifychangeproperty(
1811
dbus.UInt64, "Interval",
1812
type_func=lambda td: td.total_seconds() * 1000)
1813
checker_command = notifychangeproperty(dbus.String, "Checker")
1814
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1815
invalidate_only=True)
1816
1817
del notifychangeproperty
1818
1819
def __del__(self, *args, **kwargs):
1820
try:
1821
self.remove_from_connection()
1822
except LookupError:
1823
pass
1824
if hasattr(DBusObjectWithProperties, "__del__"):
1825
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1826
Client.__del__(self, *args, **kwargs)
1827
1828
def checker_callback(self, source, condition,
1829
connection, command, *args, **kwargs):
1830
ret = Client.checker_callback(self, source, condition,
1831
connection, command, *args,
1832
**kwargs)
1833
exitstatus = self.last_checker_status
1834
if exitstatus >= 0:
1835
# Emit D-Bus signal
1836
self.CheckerCompleted(dbus.Int16(exitstatus),
1837
# This is specific to GNU libC
1838
dbus.Int64(exitstatus << 8),
1839
dbus.String(command))
1840
else:
1841
# Emit D-Bus signal
1842
self.CheckerCompleted(dbus.Int16(-1),
1843
dbus.Int64(
1844
# This is specific to GNU libC
1845
(exitstatus << 8)
1846
| self.last_checker_signal),
1847
dbus.String(command))
1848
return ret
1849
1850
def start_checker(self, *args, **kwargs):
1851
old_checker_pid = getattr(self.checker, "pid", None)
1852
r = Client.start_checker(self, *args, **kwargs)
1853
# Only if new checker process was started
1854
if (self.checker is not None
1855
and old_checker_pid != self.checker.pid):
1856
# Emit D-Bus signal
1857
self.CheckerStarted(self.current_checker_command)
1858
return r
1859
1860
def _reset_approved(self):
1861
self.approved = None
1862
return False
1863
1864
def approve(self, value=True):
1865
self.approved = value
1866
GLib.timeout_add(int(self.approval_duration.total_seconds()
1867
* 1000), self._reset_approved)
1868
self.send_changedstate()
1869
1870
# D-Bus methods, signals & properties
1871
1872
# Interfaces
1873
1874
# Signals
1875
1876
# CheckerCompleted - signal
1877
@dbus.service.signal(_interface, signature="nxs")
1878
def CheckerCompleted(self, exitcode, waitstatus, command):
1879
"D-Bus signal"
1880
pass
1881
1882
# CheckerStarted - signal
1883
@dbus.service.signal(_interface, signature="s")
1884
def CheckerStarted(self, command):
1885
"D-Bus signal"
1886
pass
1887
1888
# PropertyChanged - signal
1889
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1890
@dbus.service.signal(_interface, signature="sv")
1891
def PropertyChanged(self, property, value):
1892
"D-Bus signal"
1893
pass
1894
1895
# GotSecret - signal
1896
@dbus.service.signal(_interface)
1897
def GotSecret(self):
1898
"""D-Bus signal
1899
Is sent after a successful transfer of secret from the Mandos
1900
server to mandos-client
1901
"""
1902
pass
1903
1904
# Rejected - signal
1905
@dbus.service.signal(_interface, signature="s")
1906
def Rejected(self, reason):
1907
"D-Bus signal"
1908
pass
1909
1910
# NeedApproval - signal
1911
@dbus.service.signal(_interface, signature="tb")
1912
def NeedApproval(self, timeout, default):
1913
"D-Bus signal"
1914
return self.need_approval()
1915
1916
# Methods
1917
1918
# Approve - method
1919
@dbus.service.method(_interface, in_signature="b")
1920
def Approve(self, value):
1921
self.approve(value)
1922
1923
# CheckedOK - method
1924
@dbus.service.method(_interface)
1925
def CheckedOK(self):
1926
self.checked_ok()
1927
1928
# Enable - method
1929
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1930
@dbus.service.method(_interface)
1931
def Enable(self):
1932
"D-Bus method"
1933
self.enable()
1934
1935
# StartChecker - method
1936
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1937
@dbus.service.method(_interface)
1938
def StartChecker(self):
1939
"D-Bus method"
1940
self.start_checker()
1941
1942
# Disable - method
1943
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1944
@dbus.service.method(_interface)
1945
def Disable(self):
1946
"D-Bus method"
1947
self.disable()
1948
1949
# StopChecker - method
1950
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1951
@dbus.service.method(_interface)
1952
def StopChecker(self):
1953
self.stop_checker()
1954
1955
# Properties
1956
1957
# ApprovalPending - property
1958
@dbus_service_property(_interface, signature="b", access="read")
1959
def ApprovalPending_dbus_property(self):
1960
return dbus.Boolean(bool(self.approvals_pending))
1961
1962
# ApprovedByDefault - property
1963
@dbus_service_property(_interface,
1964
signature="b",
1965
access="readwrite")
1966
def ApprovedByDefault_dbus_property(self, value=None):
1967
if value is None: # get
1968
return dbus.Boolean(self.approved_by_default)
1969
self.approved_by_default = bool(value)
1970
1971
# ApprovalDelay - property
1972
@dbus_service_property(_interface,
1973
signature="t",
1974
access="readwrite")
1975
def ApprovalDelay_dbus_property(self, value=None):
1976
if value is None: # get
1977
return dbus.UInt64(self.approval_delay.total_seconds()
1978
* 1000)
1979
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1980
1981
# ApprovalDuration - property
1982
@dbus_service_property(_interface,
1983
signature="t",
1984
access="readwrite")
1985
def ApprovalDuration_dbus_property(self, value=None):
1986
if value is None: # get
1987
return dbus.UInt64(self.approval_duration.total_seconds()
1988
* 1000)
1989
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1990
1991
# Name - property
1992
@dbus_annotations(
1993
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1994
@dbus_service_property(_interface, signature="s", access="read")
1995
def Name_dbus_property(self):
1996
return dbus.String(self.name)
1997
1998
# Fingerprint - property
1999
@dbus_annotations(
2000
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2001
@dbus_service_property(_interface, signature="s", access="read")
2002
def Fingerprint_dbus_property(self):
2003
return dbus.String(self.fingerprint)
2004
2005
# Host - property
2006
@dbus_service_property(_interface,
2007
signature="s",
2008
access="readwrite")
2009
def Host_dbus_property(self, value=None):
2010
if value is None: # get
2011
return dbus.String(self.host)
2012
self.host = str(value)
2013
2014
# Created - property
2015
@dbus_annotations(
2016
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2017
@dbus_service_property(_interface, signature="s", access="read")
2018
def Created_dbus_property(self):
2019
return datetime_to_dbus(self.created)
2020
2021
# LastEnabled - property
2022
@dbus_service_property(_interface, signature="s", access="read")
2023
def LastEnabled_dbus_property(self):
2024
return datetime_to_dbus(self.last_enabled)
2025
2026
# Enabled - property
2027
@dbus_service_property(_interface,
2028
signature="b",
2029
access="readwrite")
2030
def Enabled_dbus_property(self, value=None):
2031
if value is None: # get
2032
return dbus.Boolean(self.enabled)
2033
if value:
2034
self.enable()
2035
else:
2036
self.disable()
2037
2038
# LastCheckedOK - property
2039
@dbus_service_property(_interface,
2040
signature="s",
2041
access="readwrite")
2042
def LastCheckedOK_dbus_property(self, value=None):
2043
if value is not None:
2044
self.checked_ok()
2045
return
2046
return datetime_to_dbus(self.last_checked_ok)
2047
2048
# LastCheckerStatus - property
2049
@dbus_service_property(_interface, signature="n", access="read")
2050
def LastCheckerStatus_dbus_property(self):
2051
return dbus.Int16(self.last_checker_status)
2052
2053
# Expires - property
2054
@dbus_service_property(_interface, signature="s", access="read")
2055
def Expires_dbus_property(self):
2056
return datetime_to_dbus(self.expires)
2057
2058
# LastApprovalRequest - property
2059
@dbus_service_property(_interface, signature="s", access="read")
2060
def LastApprovalRequest_dbus_property(self):
2061
return datetime_to_dbus(self.last_approval_request)
2062
2063
# Timeout - property
2064
@dbus_service_property(_interface,
2065
signature="t",
2066
access="readwrite")
2067
def Timeout_dbus_property(self, value=None):
2068
if value is None: # get
2069
return dbus.UInt64(self.timeout.total_seconds() * 1000)
2070
old_timeout = self.timeout
2071
self.timeout = datetime.timedelta(0, 0, 0, value)
2072
# Reschedule disabling
2073
if self.enabled:
2074
now = datetime.datetime.utcnow()
2075
self.expires += self.timeout - old_timeout
2076
if self.expires <= now:
2077
# The timeout has passed
2078
self.disable()
2079
else:
2080
if (getattr(self, "disable_initiator_tag", None)
2081
is None):
2082
return
2083
GLib.source_remove(self.disable_initiator_tag)
2084
self.disable_initiator_tag = GLib.timeout_add(
2085
int((self.expires - now).total_seconds() * 1000),
2086
self.disable)
2087
2088
# ExtendedTimeout - property
2089
@dbus_service_property(_interface,
2090
signature="t",
2091
access="readwrite")
2092
def ExtendedTimeout_dbus_property(self, value=None):
2093
if value is None: # get
2094
return dbus.UInt64(self.extended_timeout.total_seconds()
2095
* 1000)
2096
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
2097
2098
# Interval - property
2099
@dbus_service_property(_interface,
2100
signature="t",
2101
access="readwrite")
2102
def Interval_dbus_property(self, value=None):
2103
if value is None: # get
2104
return dbus.UInt64(self.interval.total_seconds() * 1000)
2105
self.interval = datetime.timedelta(0, 0, 0, value)
2106
if getattr(self, "checker_initiator_tag", None) is None:
2107
return
2108
if self.enabled:
2109
# Reschedule checker run
2110
GLib.source_remove(self.checker_initiator_tag)
2111
self.checker_initiator_tag = GLib.timeout_add(
2112
value, self.start_checker)
2113
self.start_checker() # Start one now, too
2114
2115
# Checker - property
2116
@dbus_service_property(_interface,
2117
signature="s",
2118
access="readwrite")
2119
def Checker_dbus_property(self, value=None):
2120
if value is None: # get
2121
return dbus.String(self.checker_command)
2122
self.checker_command = str(value)
2123
2124
# CheckerRunning - property
2125
@dbus_service_property(_interface,
2126
signature="b",
2127
access="readwrite")
2128
def CheckerRunning_dbus_property(self, value=None):
2129
if value is None: # get
2130
return dbus.Boolean(self.checker is not None)
2131
if value:
2132
self.start_checker()
2133
else:
2134
self.stop_checker()
2135
2136
# ObjectPath - property
2137
@dbus_annotations(
2138
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
2139
"org.freedesktop.DBus.Deprecated": "true"})
2140
@dbus_service_property(_interface, signature="o", access="read")
2141
def ObjectPath_dbus_property(self):
2142
return self.dbus_object_path # is already a dbus.ObjectPath
2143
2144
# Secret = property
2145
@dbus_annotations(
2146
{"org.freedesktop.DBus.Property.EmitsChangedSignal":
2147
"invalidates"})
2148
@dbus_service_property(_interface,
2149
signature="ay",
2150
access="write",
2151
byte_arrays=True)
2152
def Secret_dbus_property(self, value):
2153
self.secret = bytes(value)
2154
2155
del _interface
2156
2157
2158
class ProxyClient(object):
2159
def __init__(self, child_pipe, fpr, address):
2160
self._pipe = child_pipe
2161
self._pipe.send(('init', fpr, address))
2162
if not self._pipe.recv():
2163
raise KeyError(fpr)
2164
2165
def __getattribute__(self, name):
2166
if name == '_pipe':
2167
return super(ProxyClient, self).__getattribute__(name)
2168
self._pipe.send(('getattr', name))
2169
data = self._pipe.recv()
2170
if data[0] == 'data':
2171
return data[1]
2172
if data[0] == 'function':
2173
2174
def func(*args, **kwargs):
2175
self._pipe.send(('funcall', name, args, kwargs))
2176
return self._pipe.recv()[1]
2177
2178
return func
2179
2180
def __setattr__(self, name, value):
2181
if name == '_pipe':
2182
return super(ProxyClient, self).__setattr__(name, value)
2183
self._pipe.send(('setattr', name, value))
2184
2185
2186
class ClientHandler(socketserver.BaseRequestHandler, object):
2187
"""A class to handle client connections.
2188
2189
Instantiated once for each connection to handle it.
368
def still_valid(self):
369
"""Has the timeout not yet passed for this client?"""
370
now = datetime.datetime.now()
371
if self.last_checked_ok is None:
372
return now < (self.created + self.timeout)
373
else:
374
return now < (self.last_checked_ok + self.timeout)
375
376
377
def peer_certificate(session):
378
"Return the peer's OpenPGP certificate as a bytestring"
379
# If not an OpenPGP certificate...
380
if gnutls.library.functions.gnutls_certificate_type_get\
381
(session._c_object) \
382
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP:
383
# ...do the normal thing
384
return session.peer_certificate
385
list_size = ctypes.c_uint()
386
cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
387
(session._c_object, ctypes.byref(list_size))
388
if list_size.value == 0:
389
return None
390
cert = cert_list[0]
391
return ctypes.string_at(cert.data, cert.size)
392
393
394
def fingerprint(openpgp):
395
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
396
# New GnuTLS "datum" with the OpenPGP public key
397
datum = gnutls.library.types.gnutls_datum_t\
398
(ctypes.cast(ctypes.c_char_p(openpgp),
399
ctypes.POINTER(ctypes.c_ubyte)),
400
ctypes.c_uint(len(openpgp)))
401
# New empty GnuTLS certificate
402
crt = gnutls.library.types.gnutls_openpgp_crt_t()
403
gnutls.library.functions.gnutls_openpgp_crt_init\
404
(ctypes.byref(crt))
405
# Import the OpenPGP public key into the certificate
406
gnutls.library.functions.gnutls_openpgp_crt_import\
407
(crt, ctypes.byref(datum),
408
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
409
# New buffer for the fingerprint
410
buffer = ctypes.create_string_buffer(20)
411
buffer_length = ctypes.c_size_t()
412
# Get the fingerprint from the certificate into the buffer
413
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
414
(crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
415
# Deinit the certificate
416
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
417
# Convert the buffer to a Python bytestring
418
fpr = ctypes.string_at(buffer, buffer_length.value)
419
# Convert the bytestring to hexadecimal notation
420
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
421
return hex_fpr
422
423
424
class tcp_handler(SocketServer.BaseRequestHandler, object):
425
"""A TCP request handler class.
426
Instantiated by IPv6_TCPServer for each request to handle it.
2190
427
Note: This will run in its own forked process."""
2191
428
2192
429
def handle(self):
2193
with contextlib.closing(self.server.child_pipe) as child_pipe:
2194
logger.info("TCP connection from: %s",
2195
str(self.client_address))
2196
logger.debug("Pipe FD: %d",
2197
self.server.child_pipe.fileno())
2198
2199
session = gnutls.ClientSession(self.request)
2200
2201
# priority = ':'.join(("NONE", "+VERS-TLS1.1",
2202
# "+AES-256-CBC", "+SHA1",
2203
# "+COMP-NULL", "+CTYPE-OPENPGP",
2204
# "+DHE-DSS"))
2205
# Use a fallback default, since this MUST be set.
2206
priority = self.server.gnutls_priority
2207
if priority is None:
2208
priority = "NORMAL"
2209
gnutls.priority_set_direct(session._c_object,
2210
priority.encode("utf-8"),
2211
None)
2212
2213
# Start communication using the Mandos protocol
2214
# Get protocol number
2215
line = self.request.makefile().readline()
2216
logger.debug("Protocol version: %r", line)
2217
try:
2218
if int(line.strip().split()[0]) > 1:
2219
raise RuntimeError(line)
2220
except (ValueError, IndexError, RuntimeError) as error:
2221
logger.error("Unknown protocol version: %s", error)
2222
return
2223
2224
# Start GnuTLS connection
2225
try:
2226
session.handshake()
2227
except gnutls.Error as error:
2228
logger.warning("Handshake failed: %s", error)
2229
# Do not run session.bye() here: the session is not
2230
# established. Just abandon the request.
2231
return
2232
logger.debug("Handshake succeeded")
2233
2234
approval_required = False
2235
try:
2236
try:
2237
fpr = self.fingerprint(
2238
self.peer_certificate(session))
2239
except (TypeError, gnutls.Error) as error:
2240
logger.warning("Bad certificate: %s", error)
2241
return
2242
logger.debug("Fingerprint: %s", fpr)
2243
2244
try:
2245
client = ProxyClient(child_pipe, fpr,
2246
self.client_address)
2247
except KeyError:
2248
return
2249
2250
if client.approval_delay:
2251
delay = client.approval_delay
2252
client.approvals_pending += 1
2253
approval_required = True
2254
2255
while True:
2256
if not client.enabled:
2257
logger.info("Client %s is disabled",
2258
client.name)
2259
if self.server.use_dbus:
2260
# Emit D-Bus signal
2261
client.Rejected("Disabled")
2262
return
2263
2264
if client.approved or not client.approval_delay:
2265
# We are approved or approval is disabled
2266
break
2267
elif client.approved is None:
2268
logger.info("Client %s needs approval",
2269
client.name)
2270
if self.server.use_dbus:
2271
# Emit D-Bus signal
2272
client.NeedApproval(
2273
client.approval_delay.total_seconds()
2274
* 1000, client.approved_by_default)
2275
else:
2276
logger.warning("Client %s was not approved",
2277
client.name)
2278
if self.server.use_dbus:
2279
# Emit D-Bus signal
2280
client.Rejected("Denied")
2281
return
2282
2283
# wait until timeout or approved
2284
time = datetime.datetime.now()
2285
client.changedstate.acquire()
2286
client.changedstate.wait(delay.total_seconds())
2287
client.changedstate.release()
2288
time2 = datetime.datetime.now()
2289
if (time2 - time) >= delay:
2290
if not client.approved_by_default:
2291
logger.warning("Client %s timed out while"
2292
" waiting for approval",
2293
client.name)
2294
if self.server.use_dbus:
2295
# Emit D-Bus signal
2296
client.Rejected("Approval timed out")
2297
return
2298
else:
2299
break
2300
else:
2301
delay -= time2 - time
2302
2303
try:
2304
session.send(client.secret)
2305
except gnutls.Error as error:
2306
logger.warning("gnutls send failed",
2307
exc_info=error)
2308
return
2309
2310
logger.info("Sending secret to %s", client.name)
2311
# bump the timeout using extended_timeout
2312
client.bump_timeout(client.extended_timeout)
2313
if self.server.use_dbus:
2314
# Emit D-Bus signal
2315
client.GotSecret()
2316
2317
finally:
2318
if approval_required:
2319
client.approvals_pending -= 1
2320
try:
2321
session.bye()
2322
except gnutls.Error as error:
2323
logger.warning("GnuTLS bye failed",
2324
exc_info=error)
2325
2326
@staticmethod
2327
def peer_certificate(session):
2328
"Return the peer's OpenPGP certificate as a bytestring"
2329
# If not an OpenPGP certificate...
2330
if (gnutls.certificate_type_get(session._c_object)
2331
!= gnutls.CRT_OPENPGP):
2332
# ...return invalid data
2333
return b""
2334
list_size = ctypes.c_uint(1)
2335
cert_list = (gnutls.certificate_get_peers
2336
(session._c_object, ctypes.byref(list_size)))
2337
if not bool(cert_list) and list_size.value != 0:
2338
raise gnutls.Error("error getting peer certificate")
2339
if list_size.value == 0:
2340
return None
2341
cert = cert_list[0]
2342
return ctypes.string_at(cert.data, cert.size)
2343
2344
@staticmethod
2345
def fingerprint(openpgp):
2346
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
2347
# New GnuTLS "datum" with the OpenPGP public key
2348
datum = gnutls.datum_t(
2349
ctypes.cast(ctypes.c_char_p(openpgp),
2350
ctypes.POINTER(ctypes.c_ubyte)),
2351
ctypes.c_uint(len(openpgp)))
2352
# New empty GnuTLS certificate
2353
crt = gnutls.openpgp_crt_t()
2354
gnutls.openpgp_crt_init(ctypes.byref(crt))
2355
# Import the OpenPGP public key into the certificate
2356
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2357
gnutls.OPENPGP_FMT_RAW)
2358
# Verify the self signature in the key
2359
crtverify = ctypes.c_uint()
2360
gnutls.openpgp_crt_verify_self(crt, 0,
2361
ctypes.byref(crtverify))
2362
if crtverify.value != 0:
2363
gnutls.openpgp_crt_deinit(crt)
2364
raise gnutls.CertificateSecurityError("Verify failed")
2365
# New buffer for the fingerprint
2366
buf = ctypes.create_string_buffer(20)
2367
buf_len = ctypes.c_size_t()
2368
# Get the fingerprint from the certificate into the buffer
2369
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2370
ctypes.byref(buf_len))
2371
# Deinit the certificate
2372
gnutls.openpgp_crt_deinit(crt)
2373
# Convert the buffer to a Python bytestring
2374
fpr = ctypes.string_at(buf, buf_len.value)
2375
# Convert the bytestring to hexadecimal notation
2376
hex_fpr = binascii.hexlify(fpr).upper()
2377
return hex_fpr
2378
2379
2380
class MultiprocessingMixIn(object):
2381
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2382
2383
def sub_process_main(self, request, address):
2384
try:
2385
self.finish_request(request, address)
2386
except Exception:
2387
self.handle_error(request, address)
2388
self.close_request(request)
2389
2390
def process_request(self, request, address):
2391
"""Start a new process to process the request."""
2392
proc = multiprocessing.Process(target=self.sub_process_main,
2393
args=(request, address))
2394
proc.start()
2395
return proc
2396
2397
2398
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
2399
""" adds a pipe to the MixIn """
2400
2401
def process_request(self, request, client_address):
2402
"""Overrides and wraps the original process_request().
2403
2404
This function creates a new pipe in self.pipe
2405
"""
2406
parent_pipe, self.child_pipe = multiprocessing.Pipe()
2407
2408
proc = MultiprocessingMixIn.process_request(self, request,
2409
client_address)
2410
self.child_pipe.close()
2411
self.add_pipe(parent_pipe, proc)
2412
2413
def add_pipe(self, parent_pipe, proc):
2414
"""Dummy function; override as necessary"""
2415
raise NotImplementedError()
2416
2417
2418
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
2419
socketserver.TCPServer, object):
2420
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
2421
430
logger.info(u"TCP connection from: %s",
431
unicode(self.client_address))
432
session = gnutls.connection.ClientSession\
433
(self.request, gnutls.connection.X509Credentials())
434
435
line = self.request.makefile().readline()
436
logger.debug(u"Protocol version: %r", line)
437
try:
438
if int(line.strip().split()[0]) > 1:
439
raise RuntimeError
440
except (ValueError, IndexError, RuntimeError), error:
441
logger.error(u"Unknown protocol version: %s", error)
442
return
443
444
# Note: gnutls.connection.X509Credentials is really a generic
445
# GnuTLS certificate credentials object so long as no X.509
446
# keys are added to it. Therefore, we can use it here despite
447
# using OpenPGP certificates.
448
449
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
450
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
451
# "+DHE-DSS"))
452
priority = "NORMAL" # Fallback default, since this
453
# MUST be set.
454
if self.server.settings["priority"]:
455
priority = self.server.settings["priority"]
456
gnutls.library.functions.gnutls_priority_set_direct\
457
(session._c_object, priority, None);
458
459
try:
460
session.handshake()
461
except gnutls.errors.GNUTLSError, error:
462
logger.warning(u"Handshake failed: %s", error)
463
# Do not run session.bye() here: the session is not
464
# established. Just abandon the request.
465
return
466
try:
467
fpr = fingerprint(peer_certificate(session))
468
except (TypeError, gnutls.errors.GNUTLSError), error:
469
logger.warning(u"Bad certificate: %s", error)
470
session.bye()
471
return
472
logger.debug(u"Fingerprint: %s", fpr)
473
client = None
474
for c in self.server.clients:
475
if c.fingerprint == fpr:
476
client = c
477
break
478
if not client:
479
logger.warning(u"Client not found for fingerprint: %s",
480
fpr)
481
session.bye()
482
return
483
# Have to check if client.still_valid(), since it is possible
484
# that the client timed out while establishing the GnuTLS
485
# session.
486
if not client.still_valid():
487
logger.warning(u"Client %(name)s is invalid",
488
vars(client))
489
session.bye()
490
return
491
sent_size = 0
492
while sent_size < len(client.secret):
493
sent = session.send(client.secret[sent_size:])
494
logger.debug(u"Sent: %d, remaining: %d",
495
sent, len(client.secret)
496
- (sent_size + sent))
497
sent_size += sent
498
session.bye()
499
500
501
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
502
"""IPv6 TCP server. Accepts 'None' as address and/or port.
2422
503
Attributes:
2423
enabled: Boolean; whether this server is activated yet
2424
interface: None or a network interface name (string)
2425
use_ipv6: Boolean; to use IPv6 or not
504
settings: Server settings
505
clients: Set() of Client objects
2426
506
"""
2427
2428
def __init__(self, server_address, RequestHandlerClass,
2429
interface=None,
2430
use_ipv6=True,
2431
socketfd=None):
2432
"""If socketfd is set, use that file descriptor instead of
2433
creating a new one with socket.socket().
2434
"""
2435
self.interface = interface
2436
if use_ipv6:
2437
self.address_family = socket.AF_INET6
2438
if socketfd is not None:
2439
# Save the file descriptor
2440
self.socketfd = socketfd
2441
# Save the original socket.socket() function
2442
self.socket_socket = socket.socket
2443
2444
# To implement --socket, we monkey patch socket.socket.
2445
#
2446
# (When socketserver.TCPServer is a new-style class, we
2447
# could make self.socket into a property instead of monkey
2448
# patching socket.socket.)
2449
#
2450
# Create a one-time-only replacement for socket.socket()
2451
@functools.wraps(socket.socket)
2452
def socket_wrapper(*args, **kwargs):
2453
# Restore original function so subsequent calls are
2454
# not affected.
2455
socket.socket = self.socket_socket
2456
del self.socket_socket
2457
# This time only, return a new socket object from the
2458
# saved file descriptor.
2459
return socket.fromfd(self.socketfd, *args, **kwargs)
2460
# Replace socket.socket() function with wrapper
2461
socket.socket = socket_wrapper
2462
# The socketserver.TCPServer.__init__ will call
2463
# socket.socket(), which might be our replacement,
2464
# socket_wrapper(), if socketfd was set.
2465
socketserver.TCPServer.__init__(self, server_address,
2466
RequestHandlerClass)
2467
507
address_family = socket.AF_INET6
508
def __init__(self, *args, **kwargs):
509
if "settings" in kwargs:
510
self.settings = kwargs["settings"]
511
del kwargs["settings"]
512
if "clients" in kwargs:
513
self.clients = kwargs["clients"]
514
del kwargs["clients"]
515
return super(type(self), self).__init__(*args, **kwargs)
2468
516
def server_bind(self):
2469
517
"""This overrides the normal server_bind() function
2470
518
to bind to an interface if one was specified, and also NOT to
2471
519
bind to an address or port if they were not specified."""
2472
global SO_BINDTODEVICE
2473
if self.interface is not None:
2474
if SO_BINDTODEVICE is None:
2475
# Fall back to a hard-coded value which seems to be
2476
# common enough.
2477
logger.warning("SO_BINDTODEVICE not found, trying 25")
2478
SO_BINDTODEVICE = 25
520
if self.settings["interface"]:
521
# 25 is from /usr/include/asm-i486/socket.h
522
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
2479
523
try:
2480
self.socket.setsockopt(
2481
socket.SOL_SOCKET, SO_BINDTODEVICE,
2482
(self.interface + "\0").encode("utf-8"))
2483
except socket.error as error:
2484
if error.errno == errno.EPERM:
2485
logger.error("No permission to bind to"
2486
" interface %s", self.interface)
2487
elif error.errno == errno.ENOPROTOOPT:
2488
logger.error("SO_BINDTODEVICE not available;"
2489
" cannot bind to interface %s",
2490
self.interface)
2491
elif error.errno == errno.ENODEV:
2492
logger.error("Interface %s does not exist,"
2493
" cannot bind", self.interface)
524
self.socket.setsockopt(socket.SOL_SOCKET,
525
SO_BINDTODEVICE,
526
self.settings["interface"])
527
except socket.error, error:
528
if error[0] == errno.EPERM:
529
logger.error(u"No permission to"
530
u" bind to interface %s",
531
self.settings["interface"])
2494
532
else:
2495
raise
533
raise error
2496
534
# Only bind(2) the socket if we really need to.
2497
535
if self.server_address[0] or self.server_address[1]:
2498
536
if not self.server_address[0]:
2499
if self.address_family == socket.AF_INET6:
2500
any_address = "::" # in6addr_any
2501
else:
2502
any_address = "0.0.0.0" # INADDR_ANY
2503
self.server_address = (any_address,
537
in6addr_any = "::"
538
self.server_address = (in6addr_any,
2504
539
self.server_address[1])
2505
540
elif not self.server_address[1]:
2506
self.server_address = (self.server_address[0], 0)
2507
# if self.interface:
541
self.server_address = (self.server_address[0],
542
0)
543
# if self.settings["interface"]:
2508
544
# self.server_address = (self.server_address[0],
2509
545
# 0, # port
2510
546
# 0, # flowinfo
2511
547
# if_nametoindex
2512
# (self.interface))
2513
return socketserver.TCPServer.server_bind(self)
2514
2515
2516
class MandosServer(IPv6_TCPServer):
2517
"""Mandos server.
2518
2519
Attributes:
2520
clients: set of Client objects
2521
gnutls_priority GnuTLS priority string
2522
use_dbus: Boolean; to emit D-Bus signals or not
2523
2524
Assumes a GLib.MainLoop event loop.
2525
"""
2526
2527
def __init__(self, server_address, RequestHandlerClass,
2528
interface=None,
2529
use_ipv6=True,
2530
clients=None,
2531
gnutls_priority=None,
2532
use_dbus=True,
2533
socketfd=None):
2534
self.enabled = False
2535
self.clients = clients
2536
if self.clients is None:
2537
self.clients = {}
2538
self.use_dbus = use_dbus
2539
self.gnutls_priority = gnutls_priority
2540
IPv6_TCPServer.__init__(self, server_address,
2541
RequestHandlerClass,
2542
interface=interface,
2543
use_ipv6=use_ipv6,
2544
socketfd=socketfd)
2545
2546
def server_activate(self):
2547
if self.enabled:
2548
return socketserver.TCPServer.server_activate(self)
2549
2550
def enable(self):
2551
self.enabled = True
2552
2553
def add_pipe(self, parent_pipe, proc):
2554
# Call "handle_ipc" for both data and EOF events
2555
GLib.io_add_watch(
2556
parent_pipe.fileno(),
2557
GLib.IO_IN | GLib.IO_HUP,
2558
functools.partial(self.handle_ipc,
2559
parent_pipe=parent_pipe,
2560
proc=proc))
2561
2562
def handle_ipc(self, source, condition,
2563
parent_pipe=None,
2564
proc=None,
2565
client_object=None):
2566
# error, or the other end of multiprocessing.Pipe has closed
2567
if condition & (GLib.IO_ERR | GLib.IO_HUP):
2568
# Wait for other process to exit
2569
proc.join()
2570
return False
2571
2572
# Read a request from the child
2573
request = parent_pipe.recv()
2574
command = request[0]
2575
2576
if command == 'init':
2577
fpr = request[1]
2578
address = request[2]
2579
2580
for c in self.clients.values():
2581
if c.fingerprint == fpr:
2582
client = c
2583
break
2584
else:
2585
logger.info("Client not found for fingerprint: %s, ad"
2586
"dress: %s", fpr, address)
2587
if self.use_dbus:
2588
# Emit D-Bus signal
2589
mandos_dbus_service.ClientNotFound(fpr,
2590
address[0])
2591
parent_pipe.send(False)
2592
return False
2593
2594
GLib.io_add_watch(
2595
parent_pipe.fileno(),
2596
GLib.IO_IN | GLib.IO_HUP,
2597
functools.partial(self.handle_ipc,
2598
parent_pipe=parent_pipe,
2599
proc=proc,
2600
client_object=client))
2601
parent_pipe.send(True)
2602
# remove the old hook in favor of the new above hook on
2603
# same fileno
2604
return False
2605
if command == 'funcall':
2606
funcname = request[1]
2607
args = request[2]
2608
kwargs = request[3]
2609
2610
parent_pipe.send(('data', getattr(client_object,
2611
funcname)(*args,
2612
**kwargs)))
2613
2614
if command == 'getattr':
2615
attrname = request[1]
2616
if isinstance(client_object.__getattribute__(attrname),
2617
collections.Callable):
2618
parent_pipe.send(('function', ))
2619
else:
2620
parent_pipe.send((
2621
'data', client_object.__getattribute__(attrname)))
2622
2623
if command == 'setattr':
2624
attrname = request[1]
2625
value = request[2]
2626
setattr(client_object, attrname, value)
2627
2628
return True
2629
2630
2631
def rfc3339_duration_to_delta(duration):
2632
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2633
2634
>>> rfc3339_duration_to_delta("P7D")
2635
datetime.timedelta(7)
2636
>>> rfc3339_duration_to_delta("PT60S")
2637
datetime.timedelta(0, 60)
2638
>>> rfc3339_duration_to_delta("PT60M")
2639
datetime.timedelta(0, 3600)
2640
>>> rfc3339_duration_to_delta("PT24H")
2641
datetime.timedelta(1)
2642
>>> rfc3339_duration_to_delta("P1W")
2643
datetime.timedelta(7)
2644
>>> rfc3339_duration_to_delta("PT5M30S")
2645
datetime.timedelta(0, 330)
2646
>>> rfc3339_duration_to_delta("P1DT3M20S")
2647
datetime.timedelta(1, 200)
2648
"""
2649
2650
# Parsing an RFC 3339 duration with regular expressions is not
2651
# possible - there would have to be multiple places for the same
2652
# values, like seconds. The current code, while more esoteric, is
2653
# cleaner without depending on a parsing library. If Python had a
2654
# built-in library for parsing we would use it, but we'd like to
2655
# avoid excessive use of external libraries.
2656
2657
# New type for defining tokens, syntax, and semantics all-in-one
2658
Token = collections.namedtuple("Token", (
2659
"regexp", # To match token; if "value" is not None, must have
2660
# a "group" containing digits
2661
"value", # datetime.timedelta or None
2662
"followers")) # Tokens valid after this token
2663
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2664
# the "duration" ABNF definition in RFC 3339, Appendix A.
2665
token_end = Token(re.compile(r"$"), None, frozenset())
2666
token_second = Token(re.compile(r"(\d+)S"),
2667
datetime.timedelta(seconds=1),
2668
frozenset((token_end, )))
2669
token_minute = Token(re.compile(r"(\d+)M"),
2670
datetime.timedelta(minutes=1),
2671
frozenset((token_second, token_end)))
2672
token_hour = Token(re.compile(r"(\d+)H"),
2673
datetime.timedelta(hours=1),
2674
frozenset((token_minute, token_end)))
2675
token_time = Token(re.compile(r"T"),
2676
None,
2677
frozenset((token_hour, token_minute,
2678
token_second)))
2679
token_day = Token(re.compile(r"(\d+)D"),
2680
datetime.timedelta(days=1),
2681
frozenset((token_time, token_end)))
2682
token_month = Token(re.compile(r"(\d+)M"),
2683
datetime.timedelta(weeks=4),
2684
frozenset((token_day, token_end)))
2685
token_year = Token(re.compile(r"(\d+)Y"),
2686
datetime.timedelta(weeks=52),
2687
frozenset((token_month, token_end)))
2688
token_week = Token(re.compile(r"(\d+)W"),
2689
datetime.timedelta(weeks=1),
2690
frozenset((token_end, )))
2691
token_duration = Token(re.compile(r"P"), None,
2692
frozenset((token_year, token_month,
2693
token_day, token_time,
2694
token_week)))
2695
# Define starting values:
2696
# Value so far
2697
value = datetime.timedelta()
2698
found_token = None
2699
# Following valid tokens
2700
followers = frozenset((token_duration, ))
2701
# String left to parse
2702
s = duration
2703
# Loop until end token is found
2704
while found_token is not token_end:
2705
# Search for any currently valid tokens
2706
for token in followers:
2707
match = token.regexp.match(s)
2708
if match is not None:
2709
# Token found
2710
if token.value is not None:
2711
# Value found, parse digits
2712
factor = int(match.group(1), 10)
2713
# Add to value so far
2714
value += factor * token.value
2715
# Strip token from string
2716
s = token.regexp.sub("", s, 1)
2717
# Go to found token
2718
found_token = token
2719
# Set valid next tokens
2720
followers = found_token.followers
2721
break
2722
else:
2723
# No currently valid tokens were found
2724
raise ValueError("Invalid RFC 3339 duration: {!r}"
2725
.format(duration))
2726
# End token found
2727
return value
548
# (self.settings
549
# ["interface"]))
550
return super(type(self), self).server_bind()
2728
551
2729
552
2730
553
def string_to_delta(interval):
2738
561
datetime.timedelta(0, 3600)
2739
562
>>> string_to_delta('24h')
2740
563
datetime.timedelta(1)
2741
>>> string_to_delta('1w')
564
>>> string_to_delta(u'1w')
2742
565
datetime.timedelta(7)
2743
>>> string_to_delta('5m 30s')
2744
datetime.timedelta(0, 330)
2745
566
"""
2746
2747
try:
2748
return rfc3339_duration_to_delta(interval)
2749
except ValueError:
2750
pass
2751
2752
timevalue = datetime.timedelta(0)
2753
for s in interval.split():
2754
try:
2755
suffix = s[-1]
2756
value = int(s[:-1])
2757
if suffix == "d":
2758
delta = datetime.timedelta(value)
2759
elif suffix == "s":
2760
delta = datetime.timedelta(0, value)
2761
elif suffix == "m":
2762
delta = datetime.timedelta(0, 0, 0, 0, value)
2763
elif suffix == "h":
2764
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
2765
elif suffix == "w":
2766
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
2767
else:
2768
raise ValueError("Unknown suffix {!r}".format(suffix))
2769
except IndexError as e:
2770
raise ValueError(*(e.args))
2771
timevalue += delta
2772
return timevalue
2773
2774
2775
def daemon(nochdir=False, noclose=False):
567
try:
568
suffix=unicode(interval[-1])
569
value=int(interval[:-1])
570
if suffix == u"d":
571
delta = datetime.timedelta(value)
572
elif suffix == u"s":
573
delta = datetime.timedelta(0, value)
574
elif suffix == u"m":
575
delta = datetime.timedelta(0, 0, 0, 0, value)
576
elif suffix == u"h":
577
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
578
elif suffix == u"w":
579
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
580
else:
581
raise ValueError
582
except (ValueError, IndexError):
583
raise ValueError
584
return delta
585
586
587
def server_state_changed(state):
588
"""Derived from the Avahi example code"""
589
if state == avahi.SERVER_COLLISION:
590
logger.error(u"Server name collision")
591
service.remove()
592
elif state == avahi.SERVER_RUNNING:
593
service.add()
594
595
596
def entry_group_state_changed(state, error):
597
"""Derived from the Avahi example code"""
598
logger.debug(u"state change: %i", state)
599
600
if state == avahi.ENTRY_GROUP_ESTABLISHED:
601
logger.debug(u"Service established.")
602
elif state == avahi.ENTRY_GROUP_COLLISION:
603
logger.warning(u"Service name collision.")
604
service.rename()
605
elif state == avahi.ENTRY_GROUP_FAILURE:
606
logger.critical(u"Error in group state changed %s",
607
unicode(error))
608
raise AvahiGroupError("State changed: %s", str(error))
609
610
def if_nametoindex(interface):
611
"""Call the C function if_nametoindex(), or equivalent"""
612
global if_nametoindex
613
try:
614
if "ctypes.util" not in sys.modules:
615
import ctypes.util
616
if_nametoindex = ctypes.cdll.LoadLibrary\
617
(ctypes.util.find_library("c")).if_nametoindex
618
except (OSError, AttributeError):
619
if "struct" not in sys.modules:
620
import struct
621
if "fcntl" not in sys.modules:
622
import fcntl
623
def if_nametoindex(interface):
624
"Get an interface index the hard way, i.e. using fcntl()"
625
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
626
s = socket.socket()
627
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
628
struct.pack("16s16x", interface))
629
s.close()
630
interface_index = struct.unpack("I", ifreq[16:20])[0]
631
return interface_index
632
return if_nametoindex(interface)
633
634
635
def daemon(nochdir = False, noclose = False):
2776
636
"""See daemon(3). Standard BSD Unix function.
2777
2778
637
This should really exist as os.daemon, but it doesn't (yet)."""
2779
638
if os.fork():
2780
639
sys.exit()
2785
644
sys.exit()
2786
645
if not noclose:
2787
646
# Close all standard open file descriptors
2788
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
647
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2789
648
if not stat.S_ISCHR(os.fstat(null).st_mode):
2790
649
raise OSError(errno.ENODEV,
2791
"{} not a character device"
2792
.format(os.devnull))
650
"/dev/null not a character device")
2793
651
os.dup2(null, sys.stdin.fileno())
2794
652
os.dup2(null, sys.stdout.fileno())
2795
653
os.dup2(null, sys.stderr.fileno())
2798
656
2799
657
2800
658
def main():
2801
2802
##################################################################
2803
# Parsing of options, both command line and config file
2804
2805
parser = argparse.ArgumentParser()
2806
parser.add_argument("-v", "--version", action="version",
2807
version="%(prog)s {}".format(version),
2808
help="show version number and exit")
2809
parser.add_argument("-i", "--interface", metavar="IF",
2810
help="Bind to interface IF")
2811
parser.add_argument("-a", "--address",
2812
help="Address to listen for requests on")
2813
parser.add_argument("-p", "--port", type=int,
2814
help="Port number to receive requests on")
2815
parser.add_argument("--check", action="store_true",
2816
help="Run self-test")
2817
parser.add_argument("--debug", action="store_true",
2818
help="Debug mode; run in foreground and log"
2819
" to terminal", default=None)
2820
parser.add_argument("--debuglevel", metavar="LEVEL",
2821
help="Debug level for stdout output")
2822
parser.add_argument("--priority", help="GnuTLS"
2823
" priority string (see GnuTLS documentation)")
2824
parser.add_argument("--servicename",
2825
metavar="NAME", help="Zeroconf service name")
2826
parser.add_argument("--configdir",
2827
default="/etc/mandos", metavar="DIR",
2828
help="Directory to search for configuration"
2829
" files")
2830
parser.add_argument("--no-dbus", action="store_false",
2831
dest="use_dbus", help="Do not provide D-Bus"
2832
" system bus interface", default=None)
2833
parser.add_argument("--no-ipv6", action="store_false",
2834
dest="use_ipv6", help="Do not use IPv6",
2835
default=None)
2836
parser.add_argument("--no-restore", action="store_false",
2837
dest="restore", help="Do not restore stored"
2838
" state", default=None)
2839
parser.add_argument("--socket", type=int,
2840
help="Specify a file descriptor to a network"
2841
" socket to use instead of creating one")
2842
parser.add_argument("--statedir", metavar="DIR",
2843
help="Directory to save/restore state in")
2844
parser.add_argument("--foreground", action="store_true",
2845
help="Run in foreground", default=None)
2846
parser.add_argument("--no-zeroconf", action="store_false",
2847
dest="zeroconf", help="Do not use Zeroconf",
2848
default=None)
2849
2850
options = parser.parse_args()
2851
659
global main_loop_started
660
main_loop_started = False
661
662
parser = OptionParser(version = "%%prog %s" % version)
663
parser.add_option("-i", "--interface", type="string",
664
metavar="IF", help="Bind to interface IF")
665
parser.add_option("-a", "--address", type="string",
666
help="Address to listen for requests on")
667
parser.add_option("-p", "--port", type="int",
668
help="Port number to receive requests on")
669
parser.add_option("--check", action="store_true", default=False,
670
help="Run self-test")
671
parser.add_option("--debug", action="store_true",
672
help="Debug mode; run in foreground and log to"
673
" terminal")
674
parser.add_option("--priority", type="string", help="GnuTLS"
675
" priority string (see GnuTLS documentation)")
676
parser.add_option("--servicename", type="string", metavar="NAME",
677
help="Zeroconf service name")
678
parser.add_option("--configdir", type="string",
679
default="/etc/mandos", metavar="DIR",
680
help="Directory to search for configuration"
681
" files")
682
(options, args) = parser.parse_args()
683
2852
684
if options.check:
2853
685
import doctest
2854
fail_count, test_count = doctest.testmod()
2855
sys.exit(os.EX_OK if fail_count == 0 else 1)
2856
686
doctest.testmod()
687
sys.exit()
688
2857
689
# Default values for config file for server-global settings
2858
server_defaults = {"interface": "",
2859
"address": "",
2860
"port": "",
2861
"debug": "False",
2862
"priority":
2863
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2864
":+SIGN-DSA-SHA256",
2865
"servicename": "Mandos",
2866
"use_dbus": "True",
2867
"use_ipv6": "True",
2868
"debuglevel": "",
2869
"restore": "True",
2870
"socket": "",
2871
"statedir": "/var/lib/mandos",
2872
"foreground": "False",
2873
"zeroconf": "True",
2874
}
2875
690
server_defaults = { "interface": "",
691
"address": "",
692
"port": "",
693
"debug": "False",
694
"priority":
695
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
696
"servicename": "Mandos",
697
}
698
2876
699
# Parse config file for server-global settings
2877
server_config = configparser.SafeConfigParser(server_defaults)
700
server_config = ConfigParser.SafeConfigParser(server_defaults)
2878
701
del server_defaults
2879
702
server_config.read(os.path.join(options.configdir, "mandos.conf"))
703
server_section = "server"
2880
704
# Convert the SafeConfigParser object to a dict
2881
server_settings = server_config.defaults()
2882
# Use the appropriate methods on the non-string config options
2883
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
2884
server_settings[option] = server_config.getboolean("DEFAULT",
2885
option)
2886
if server_settings["port"]:
2887
server_settings["port"] = server_config.getint("DEFAULT",
2888
"port")
2889
if server_settings["socket"]:
2890
server_settings["socket"] = server_config.getint("DEFAULT",
2891
"socket")
2892
# Later, stdin will, and stdout and stderr might, be dup'ed
2893
# over with an opened os.devnull. But we don't want this to
2894
# happen with a supplied network socket.
2895
if 0 <= server_settings["socket"] <= 2:
2896
server_settings["socket"] = os.dup(server_settings
2897
["socket"])
705
server_settings = dict(server_config.items(server_section))
706
# Use getboolean on the boolean config option
707
server_settings["debug"] = server_config.getboolean\
708
(server_section, "debug")
2898
709
del server_config
2899
710
2900
711
# Override the settings from the config file with command line
2901
712
# options, if set.
2902
713
for option in ("interface", "address", "port", "debug",
2903
"priority", "servicename", "configdir", "use_dbus",
2904
"use_ipv6", "debuglevel", "restore", "statedir",
2905
"socket", "foreground", "zeroconf"):
714
"priority", "servicename", "configdir"):
2906
715
value = getattr(options, option)
2907
716
if value is not None:
2908
717
server_settings[option] = value
2909
718
del options
2910
# Force all strings to be unicode
2911
for option in server_settings.keys():
2912
if isinstance(server_settings[option], bytes):
2913
server_settings[option] = (server_settings[option]
2914
.decode("utf-8"))
2915
# Force all boolean options to be boolean
2916
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2917
"foreground", "zeroconf"):
2918
server_settings[option] = bool(server_settings[option])
2919
# Debug implies foreground
2920
if server_settings["debug"]:
2921
server_settings["foreground"] = True
2922
719
# Now we have our good server settings in "server_settings"
2923
2924
##################################################################
2925
2926
if (not server_settings["zeroconf"]
2927
and not (server_settings["port"]
2928
or server_settings["socket"] != "")):
2929
parser.error("Needs port or socket to work without Zeroconf")
2930
2931
# For convenience
720
2932
721
debug = server_settings["debug"]
2933
debuglevel = server_settings["debuglevel"]
2934
use_dbus = server_settings["use_dbus"]
2935
use_ipv6 = server_settings["use_ipv6"]
2936
stored_state_path = os.path.join(server_settings["statedir"],
2937
stored_state_file)
2938
foreground = server_settings["foreground"]
2939
zeroconf = server_settings["zeroconf"]
2940
2941
if debug:
2942
initlogger(debug, logging.DEBUG)
2943
else:
2944
if not debuglevel:
2945
initlogger(debug)
2946
else:
2947
level = getattr(logging, debuglevel.upper())
2948
initlogger(debug, level)
2949
722
723
if not debug:
724
syslogger.setLevel(logging.WARNING)
725
console.setLevel(logging.WARNING)
726
2950
727
if server_settings["servicename"] != "Mandos":
2951
syslogger.setFormatter(
2952
logging.Formatter('Mandos ({}) [%(process)d]:'
2953
' %(levelname)s: %(message)s'.format(
2954
server_settings["servicename"])))
2955
728
syslogger.setFormatter(logging.Formatter\
729
('Mandos (%s): %%(levelname)s:'
730
' %%(message)s'
731
% server_settings["servicename"]))
732
2956
733
# Parse config file with clients
2957
client_config = configparser.SafeConfigParser(Client
2958
.client_defaults)
734
client_defaults = { "timeout": "1h",
735
"interval": "5m",
736
"checker": "fping -q -- %%(host)s",
737
}
738
client_config = ConfigParser.SafeConfigParser(client_defaults)
2959
739
client_config.read(os.path.join(server_settings["configdir"],
2960
740
"clients.conf"))
2961
2962
global mandos_dbus_service
2963
mandos_dbus_service = None
2964
2965
socketfd = None
2966
if server_settings["socket"] != "":
2967
socketfd = server_settings["socket"]
2968
tcp_server = MandosServer(
2969
(server_settings["address"], server_settings["port"]),
2970
ClientHandler,
2971
interface=(server_settings["interface"] or None),
2972
use_ipv6=use_ipv6,
2973
gnutls_priority=server_settings["priority"],
2974
use_dbus=use_dbus,
2975
socketfd=socketfd)
2976
if not foreground:
2977
pidfilename = "/run/mandos.pid"
2978
if not os.path.isdir("/run/."):
2979
pidfilename = "/var/run/mandos.pid"
2980
pidfile = None
2981
try:
2982
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
2983
except IOError as e:
2984
logger.error("Could not open file %r", pidfilename,
2985
exc_info=e)
2986
2987
for name, group in (("_mandos", "_mandos"),
2988
("mandos", "mandos"),
2989
("nobody", "nogroup")):
2990
try:
2991
uid = pwd.getpwnam(name).pw_uid
2992
gid = pwd.getpwnam(group).pw_gid
2993
break
2994
except KeyError:
2995
continue
2996
else:
2997
uid = 65534
2998
gid = 65534
2999
try:
3000
os.setgid(gid)
3001
os.setuid(uid)
3002
if debug:
3003
logger.debug("Did setuid/setgid to {}:{}".format(uid,
3004
gid))
3005
except OSError as error:
3006
logger.warning("Failed to setuid/setgid to {}:{}: {}"
3007
.format(uid, gid, os.strerror(error.errno)))
3008
if error.errno != errno.EPERM:
3009
raise
3010
3011
if debug:
3012
# Enable all possible GnuTLS debugging
3013
3014
# "Use a log level over 10 to enable all debugging options."
3015
# - GnuTLS manual
3016
gnutls.global_set_log_level(11)
3017
3018
@gnutls.log_func
3019
def debug_gnutls(level, string):
3020
logger.debug("GnuTLS: %s", string[:-1])
3021
3022
gnutls.global_set_log_function(debug_gnutls)
3023
3024
# Redirect stdin so all checkers get /dev/null
3025
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
3026
os.dup2(null, sys.stdin.fileno())
3027
if null > 2:
3028
os.close(null)
3029
3030
# Need to fork before connecting to D-Bus
3031
if not foreground:
3032
# Close all input and output, do double fork, etc.
3033
daemon()
3034
3035
# multiprocessing will use threads, so before we use GLib we need
3036
# to inform GLib that threads will be used.
3037
GLib.threads_init()
3038
741
742
global service
743
service = AvahiService(name = server_settings["servicename"],
744
type = "_mandos._tcp", );
745
if server_settings["interface"]:
746
service.interface = if_nametoindex(server_settings["interface"])
747
3039
748
global main_loop
749
global bus
750
global server
3040
751
# From the Avahi example code
3041
DBusGMainLoop(set_as_default=True)
3042
main_loop = GLib.MainLoop()
752
DBusGMainLoop(set_as_default=True )
753
main_loop = gobject.MainLoop()
3043
754
bus = dbus.SystemBus()
755
server = dbus.Interface(
756
bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
757
avahi.DBUS_INTERFACE_SERVER )
3044
758
# End of Avahi example code
3045
if use_dbus:
3046
try:
3047
bus_name = dbus.service.BusName("se.recompile.Mandos",
3048
bus,
3049
do_not_queue=True)
3050
old_bus_name = dbus.service.BusName(
3051
"se.bsnet.fukt.Mandos", bus,
3052
do_not_queue=True)
3053
except dbus.exceptions.DBusException as e:
3054
logger.error("Disabling D-Bus:", exc_info=e)
3055
use_dbus = False
3056
server_settings["use_dbus"] = False
3057
tcp_server.use_dbus = False
3058
if zeroconf:
3059
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3060
service = AvahiServiceToSyslog(
3061
name=server_settings["servicename"],
3062
servicetype="_mandos._tcp",
3063
protocol=protocol,
3064
bus=bus)
3065
if server_settings["interface"]:
3066
service.interface = if_nametoindex(
3067
server_settings["interface"].encode("utf-8"))
3068
3069
global multiprocessing_manager
3070
multiprocessing_manager = multiprocessing.Manager()
3071
3072
client_class = Client
3073
if use_dbus:
3074
client_class = functools.partial(ClientDBus, bus=bus)
3075
3076
client_settings = Client.config_parser(client_config)
3077
old_client_settings = {}
3078
clients_data = {}
3079
3080
# This is used to redirect stdout and stderr for checker processes
3081
global wnull
3082
wnull = open(os.devnull, "w") # A writable /dev/null
3083
# Only used if server is running in foreground but not in debug
3084
# mode
3085
if debug or not foreground:
3086
wnull.close()
3087
3088
# Get client data and settings from last running state.
3089
if server_settings["restore"]:
3090
try:
3091
with open(stored_state_path, "rb") as stored_state:
3092
if sys.version_info.major == 2:
3093
clients_data, old_client_settings = pickle.load(
3094
stored_state)
3095
else:
3096
bytes_clients_data, bytes_old_client_settings = (
3097
pickle.load(stored_state, encoding="bytes"))
3098
# Fix bytes to strings
3099
# clients_data
3100
# .keys()
3101
clients_data = {(key.decode("utf-8")
3102
if isinstance(key, bytes)
3103
else key): value
3104
for key, value in
3105
bytes_clients_data.items()}
3106
del bytes_clients_data
3107
for key in clients_data:
3108
value = {(k.decode("utf-8")
3109
if isinstance(k, bytes) else k): v
3110
for k, v in
3111
clients_data[key].items()}
3112
clients_data[key] = value
3113
# .client_structure
3114
value["client_structure"] = [
3115
(s.decode("utf-8")
3116
if isinstance(s, bytes)
3117
else s) for s in
3118
value["client_structure"]]
3119
# .name & .host
3120
for k in ("name", "host"):
3121
if isinstance(value[k], bytes):
3122
value[k] = value[k].decode("utf-8")
3123
# old_client_settings
3124
# .keys()
3125
old_client_settings = {
3126
(key.decode("utf-8")
3127
if isinstance(key, bytes)
3128
else key): value
3129
for key, value in
3130
bytes_old_client_settings.items()}
3131
del bytes_old_client_settings
3132
# .host
3133
for value in old_client_settings.values():
3134
if isinstance(value["host"], bytes):
3135
value["host"] = (value["host"]
3136
.decode("utf-8"))
3137
os.remove(stored_state_path)
3138
except IOError as e:
3139
if e.errno == errno.ENOENT:
3140
logger.warning("Could not load persistent state:"
3141
" {}".format(os.strerror(e.errno)))
3142
else:
3143
logger.critical("Could not load persistent state:",
3144
exc_info=e)
3145
raise
3146
except EOFError as e:
3147
logger.warning("Could not load persistent state: "
3148
"EOFError:",
3149
exc_info=e)
3150
3151
with PGPEngine() as pgp:
3152
for client_name, client in clients_data.items():
3153
# Skip removed clients
3154
if client_name not in client_settings:
3155
continue
3156
3157
# Decide which value to use after restoring saved state.
3158
# We have three different values: Old config file,
3159
# new config file, and saved state.
3160
# New config value takes precedence if it differs from old
3161
# config value, otherwise use saved state.
3162
for name, value in client_settings[client_name].items():
3163
try:
3164
# For each value in new config, check if it
3165
# differs from the old config value (Except for
3166
# the "secret" attribute)
3167
if (name != "secret"
3168
and (value !=
3169
old_client_settings[client_name][name])):
3170
client[name] = value
3171
except KeyError:
3172
pass
3173
3174
# Clients who has passed its expire date can still be
3175
# enabled if its last checker was successful. A Client
3176
# whose checker succeeded before we stored its state is
3177
# assumed to have successfully run all checkers during
3178
# downtime.
3179
if client["enabled"]:
3180
if datetime.datetime.utcnow() >= client["expires"]:
3181
if not client["last_checked_ok"]:
3182
logger.warning(
3183
"disabling client {} - Client never "
3184
"performed a successful checker".format(
3185
client_name))
3186
client["enabled"] = False
3187
elif client["last_checker_status"] != 0:
3188
logger.warning(
3189
"disabling client {} - Client last"
3190
" checker failed with error code"
3191
" {}".format(
3192
client_name,
3193
client["last_checker_status"]))
3194
client["enabled"] = False
3195
else:
3196
client["expires"] = (
3197
datetime.datetime.utcnow()
3198
+ client["timeout"])
3199
logger.debug("Last checker succeeded,"
3200
" keeping {} enabled".format(
3201
client_name))
3202
try:
3203
client["secret"] = pgp.decrypt(
3204
client["encrypted_secret"],
3205
client_settings[client_name]["secret"])
3206
except PGPError:
3207
# If decryption fails, we use secret from new settings
3208
logger.debug("Failed to decrypt {} old secret".format(
3209
client_name))
3210
client["secret"] = (client_settings[client_name]
3211
["secret"])
3212
3213
# Add/remove clients based on new changes made to config
3214
for client_name in (set(old_client_settings)
3215
- set(client_settings)):
3216
del clients_data[client_name]
3217
for client_name in (set(client_settings)
3218
- set(old_client_settings)):
3219
clients_data[client_name] = client_settings[client_name]
3220
3221
# Create all client objects
3222
for client_name, client in clients_data.items():
3223
tcp_server.clients[client_name] = client_class(
3224
name=client_name,
3225
settings=client,
3226
server_settings=server_settings)
3227
3228
if not tcp_server.clients:
3229
logger.warning("No clients defined")
3230
3231
if not foreground:
3232
if pidfile is not None:
3233
pid = os.getpid()
3234
try:
3235
with pidfile:
3236
print(pid, file=pidfile)
3237
except IOError:
3238
logger.error("Could not write to file %r with PID %d",
3239
pidfilename, pid)
759
760
clients = Set()
761
def remove_from_clients(client):
762
clients.remove(client)
763
if not clients:
764
logger.critical(u"No clients left, exiting")
765
sys.exit()
766
767
clients.update(Set(Client(name = section,
768
stop_hook = remove_from_clients,
769
config
770
= dict(client_config.items(section)))
771
for section in client_config.sections()))
772
if not clients:
773
logger.critical(u"No clients defined")
774
sys.exit(1)
775
776
if not debug:
777
logger.removeHandler(console)
778
daemon()
779
780
pidfilename = "/var/run/mandos/mandos.pid"
781
pid = os.getpid()
782
try:
783
pidfile = open(pidfilename, "w")
784
pidfile.write(str(pid) + "\n")
785
pidfile.close()
3240
786
del pidfile
3241
del pidfilename
3242
3243
for termsig in (signal.SIGHUP, signal.SIGTERM):
3244
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3245
lambda: main_loop.quit() and False)
3246
3247
if use_dbus:
3248
3249
@alternate_dbus_interfaces(
3250
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3251
class MandosDBusService(DBusObjectWithObjectManager):
3252
"""A D-Bus proxy object"""
3253
3254
def __init__(self):
3255
dbus.service.Object.__init__(self, bus, "/")
3256
3257
_interface = "se.recompile.Mandos"
3258
3259
@dbus.service.signal(_interface, signature="o")
3260
def ClientAdded(self, objpath):
3261
"D-Bus signal"
3262
pass
3263
3264
@dbus.service.signal(_interface, signature="ss")
3265
def ClientNotFound(self, fingerprint, address):
3266
"D-Bus signal"
3267
pass
3268
3269
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3270
"true"})
3271
@dbus.service.signal(_interface, signature="os")
3272
def ClientRemoved(self, objpath, name):
3273
"D-Bus signal"
3274
pass
3275
3276
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3277
"true"})
3278
@dbus.service.method(_interface, out_signature="ao")
3279
def GetAllClients(self):
3280
"D-Bus method"
3281
return dbus.Array(c.dbus_object_path for c in
3282
tcp_server.clients.values())
3283
3284
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3285
"true"})
3286
@dbus.service.method(_interface,
3287
out_signature="a{oa{sv}}")
3288
def GetAllClientsWithProperties(self):
3289
"D-Bus method"
3290
return dbus.Dictionary(
3291
{c.dbus_object_path: c.GetAll(
3292
"se.recompile.Mandos.Client")
3293
for c in tcp_server.clients.values()},
3294
signature="oa{sv}")
3295
3296
@dbus.service.method(_interface, in_signature="o")
3297
def RemoveClient(self, object_path):
3298
"D-Bus method"
3299
for c in tcp_server.clients.values():
3300
if c.dbus_object_path == object_path:
3301
del tcp_server.clients[c.name]
3302
c.remove_from_connection()
3303
# Don't signal the disabling
3304
c.disable(quiet=True)
3305
# Emit D-Bus signal for removal
3306
self.client_removed_signal(c)
3307
return
3308
raise KeyError(object_path)
3309
3310
del _interface
3311
3312
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3313
out_signature="a{oa{sa{sv}}}")
3314
def GetManagedObjects(self):
3315
"""D-Bus method"""
3316
return dbus.Dictionary(
3317
{client.dbus_object_path:
3318
dbus.Dictionary(
3319
{interface: client.GetAll(interface)
3320
for interface in
3321
client._get_all_interface_names()})
3322
for client in tcp_server.clients.values()})
3323
3324
def client_added_signal(self, client):
3325
"""Send the new standard signal and the old signal"""
3326
if use_dbus:
3327
# New standard signal
3328
self.InterfacesAdded(
3329
client.dbus_object_path,
3330
dbus.Dictionary(
3331
{interface: client.GetAll(interface)
3332
for interface in
3333
client._get_all_interface_names()}))
3334
# Old signal
3335
self.ClientAdded(client.dbus_object_path)
3336
3337
def client_removed_signal(self, client):
3338
"""Send the new standard signal and the old signal"""
3339
if use_dbus:
3340
# New standard signal
3341
self.InterfacesRemoved(
3342
client.dbus_object_path,
3343
client._get_all_interface_names())
3344
# Old signal
3345
self.ClientRemoved(client.dbus_object_path,
3346
client.name)
3347
3348
mandos_dbus_service = MandosDBusService()
3349
3350
# Save modules to variables to exempt the modules from being
3351
# unloaded before the function registered with atexit() is run.
3352
mp = multiprocessing
3353
wn = wnull
3354
787
except IOError, err:
788
logger.error(u"Could not write %s file with PID %d",
789
pidfilename, os.getpid())
790
3355
791
def cleanup():
3356
792
"Cleanup function; run on exit"
3357
if zeroconf:
3358
service.cleanup()
3359
3360
mp.active_children()
3361
wn.close()
3362
if not (tcp_server.clients or client_settings):
3363
return
3364
3365
# Store client before exiting. Secrets are encrypted with key
3366
# based on what config file has. If config file is
3367
# removed/edited, old secret will thus be unrecovable.
3368
clients = {}
3369
with PGPEngine() as pgp:
3370
for client in tcp_server.clients.values():
3371
key = client_settings[client.name]["secret"]
3372
client.encrypted_secret = pgp.encrypt(client.secret,
3373
key)
3374
client_dict = {}
3375
3376
# A list of attributes that can not be pickled
3377
# + secret.
3378
exclude = {"bus", "changedstate", "secret",
3379
"checker", "server_settings"}
3380
for name, typ in inspect.getmembers(dbus.service
3381
.Object):
3382
exclude.add(name)
3383
3384
client_dict["encrypted_secret"] = (client
3385
.encrypted_secret)
3386
for attr in client.client_structure:
3387
if attr not in exclude:
3388
client_dict[attr] = getattr(client, attr)
3389
3390
clients[client.name] = client_dict
3391
del client_settings[client.name]["secret"]
3392
3393
try:
3394
with tempfile.NamedTemporaryFile(
3395
mode='wb',
3396
suffix=".pickle",
3397
prefix='clients-',
3398
dir=os.path.dirname(stored_state_path),
3399
delete=False) as stored_state:
3400
pickle.dump((clients, client_settings), stored_state,
3401
protocol=2)
3402
tempname = stored_state.name
3403
os.rename(tempname, stored_state_path)
3404
except (IOError, OSError) as e:
3405
if not debug:
3406
try:
3407
os.remove(tempname)
3408
except NameError:
3409
pass
3410
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
3411
logger.warning("Could not save persistent state: {}"
3412
.format(os.strerror(e.errno)))
3413
else:
3414
logger.warning("Could not save persistent state:",
3415
exc_info=e)
3416
raise
3417
3418
# Delete all clients, and settings from config
3419
while tcp_server.clients:
3420
name, client = tcp_server.clients.popitem()
3421
if use_dbus:
3422
client.remove_from_connection()
3423
# Don't signal the disabling
3424
client.disable(quiet=True)
3425
# Emit D-Bus signal for removal
3426
if use_dbus:
3427
mandos_dbus_service.client_removed_signal(client)
3428
client_settings.clear()
3429
793
global group
794
# From the Avahi example code
795
if not group is None:
796
group.Free()
797
group = None
798
# End of Avahi example code
799
800
while clients:
801
client = clients.pop()
802
client.stop_hook = None
803
client.stop()
804
3430
805
atexit.register(cleanup)
3431
3432
for client in tcp_server.clients.values():
3433
if use_dbus:
3434
# Emit D-Bus signal for adding
3435
mandos_dbus_service.client_added_signal(client)
3436
# Need to initiate checking of clients
3437
if client.enabled:
3438
client.init_checker()
3439
3440
tcp_server.enable()
3441
tcp_server.server_activate()
3442
806
807
if not debug:
808
signal.signal(signal.SIGINT, signal.SIG_IGN)
809
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
810
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
811
812
for client in clients:
813
client.start()
814
815
tcp_server = IPv6_TCPServer((server_settings["address"],
816
server_settings["port"]),
817
tcp_handler,
818
settings=server_settings,
819
clients=clients)
3443
820
# Find out what port we got
3444
if zeroconf:
3445
service.port = tcp_server.socket.getsockname()[1]
3446
if use_ipv6:
3447
logger.info("Now listening on address %r, port %d,"
3448
" flowinfo %d, scope_id %d",
3449
*tcp_server.socket.getsockname())
3450
else: # IPv4
3451
logger.info("Now listening on address %r, port %d",
3452
*tcp_server.socket.getsockname())
3453
3454
# service.interface = tcp_server.socket.getsockname()[3]
3455
821
service.port = tcp_server.socket.getsockname()[1]
822
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
823
u" scope_id %d" % tcp_server.socket.getsockname())
824
825
#service.interface = tcp_server.socket.getsockname()[3]
826
3456
827
try:
3457
if zeroconf:
3458
# From the Avahi example code
3459
try:
3460
service.activate()
3461
except dbus.exceptions.DBusException as error:
3462
logger.critical("D-Bus Exception", exc_info=error)
3463
cleanup()
3464
sys.exit(1)
3465
# End of Avahi example code
3466
3467
GLib.io_add_watch(tcp_server.fileno(), GLib.IO_IN,
3468
lambda *args, **kwargs:
3469
(tcp_server.handle_request
3470
(*args[2:], **kwargs) or True))
3471
3472
logger.debug("Starting main loop")
828
# From the Avahi example code
829
server.connect_to_signal("StateChanged", server_state_changed)
830
try:
831
server_state_changed(server.GetState())
832
except dbus.exceptions.DBusException, error:
833
logger.critical(u"DBusException: %s", error)
834
sys.exit(1)
835
# End of Avahi example code
836
837
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
838
lambda *args, **kwargs:
839
tcp_server.handle_request\
840
(*args[2:], **kwargs) or True)
841
842
logger.debug(u"Starting main loop")
843
main_loop_started = True
3473
844
main_loop.run()
3474
except AvahiError as error:
3475
logger.critical("Avahi Error", exc_info=error)
3476
cleanup()
845
except AvahiError, error:
846
logger.critical(u"AvahiError: %s" + unicode(error))
3477
847
sys.exit(1)
3478
848
except KeyboardInterrupt:
3479
849
if debug:
3480
print("", file=sys.stderr)
3481
logger.debug("Server received KeyboardInterrupt")
3482
logger.debug("Server exiting")
3483
# Must run before the D-Bus bus name gets deregistered
3484
cleanup()
3485
850
print
3486
851
3487
852
if __name__ == '__main__':
3488
853
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0