To get this branch, use:
bzr branch
http://bzr.recompile.se/loggerhead/mandos/release
« back to all changes in this revision
Viewing changes to mandos
- browse files at revision 367
- compare with another revision
- download diff
- download tarball
- view history from revision 367
- Committer: Teddy Hogeborn
- Date: 2018-02-22 18:50:12 UTC
- Revision ID: teddy@recompile.se-20180222185012-etchk537ast7s1xg
Tags: version-1.7.19-1
* Makefile (version): Change to 1.7.19.
* NEWS (Version 1.7.19): Add new entry.
* debian/changelog (1.7.19-1): - '' -
* NEWS (Version 1.7.19): Add new entry.
* debian/changelog (1.7.19-1): - '' -
- files added:
- DBUS-API
- debian/source
- debian/upstream
- network-hooks.d
- plugin-helpers
- files modified:
- .bzrignore
added
removed
mandos
1
1
#!/usr/bin/python
2
2
# -*- mode: python; coding: utf-8 -*-
3
#
3
#
4
4
# Mandos server - give out binary blobs to connecting clients.
5
#
5
#
6
6
# This program is partly derived from an example program for an Avahi
7
7
# service publisher, downloaded from
8
8
# <http://avahi.org/wiki/PythonPublishExample>. This includes the
9
# 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
#
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
#
13
13
# Everything else is
14
# Copyright © 2008,2009 Teddy Hogeborn
15
# Copyright © 2008,2009 Björn Påhlsson
16
#
17
# This program is free software: you can redistribute it and/or modify
18
# it under the terms of the GNU General Public License as published by
14
# Copyright © 2008-2018 Teddy Hogeborn
15
# Copyright © 2008-2018 Björn Påhlsson
16
#
17
# This file is part of Mandos.
18
#
19
# Mandos is free software: you can redistribute it and/or modify it
20
# under the terms of the GNU General Public License as published by
19
21
# the Free Software Foundation, either version 3 of the License, or
20
22
# (at your option) any later version.
21
23
#
22
# This program is distributed in the hope that it will be useful,
23
# but WITHOUT ANY WARRANTY; without even the implied warranty of
24
# Mandos is distributed in the hope that it will be useful, but
25
# WITHOUT ANY WARRANTY; without even the implied warranty of
24
26
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
25
27
# GNU General Public License for more details.
26
#
28
#
27
29
# You should have received a copy of the GNU General Public License
28
# along with this program. If not, see
29
# <http://www.gnu.org/licenses/>.
30
#
31
# Contact the authors at <mandos@fukt.bsnet.se>.
32
#
33
34
from __future__ import division, with_statement, absolute_import
35
36
import SocketServer
30
# along with Mandos. If not, see <http://www.gnu.org/licenses/>.
31
#
32
# Contact the authors at <mandos@recompile.se>.
33
#
34
35
from __future__ import (division, absolute_import, print_function,
36
unicode_literals)
37
38
try:
39
from future_builtins import *
40
except ImportError:
41
pass
42
43
try:
44
import SocketServer as socketserver
45
except ImportError:
46
import socketserver
37
47
import socket
38
import optparse
48
import argparse
39
49
import datetime
40
50
import errno
41
import gnutls.crypto
42
import gnutls.connection
43
import gnutls.errors
44
import gnutls.library.functions
45
import gnutls.library.constants
46
import gnutls.library.types
47
import ConfigParser
51
try:
52
import ConfigParser as configparser
53
except ImportError:
54
import configparser
48
55
import sys
49
56
import re
50
57
import os
51
58
import signal
52
from sets import Set
53
59
import subprocess
54
60
import atexit
55
61
import stat
56
62
import logging
57
63
import logging.handlers
58
64
import pwd
59
from contextlib import closing
65
import contextlib
66
import struct
67
import fcntl
68
import functools
69
try:
70
import cPickle as pickle
71
except ImportError:
72
import pickle
73
import multiprocessing
74
import types
75
import binascii
76
import tempfile
77
import itertools
78
import collections
79
import codecs
60
80
61
81
import dbus
62
82
import dbus.service
63
import gobject
64
import avahi
83
from gi.repository import GLib
65
84
from dbus.mainloop.glib import DBusGMainLoop
66
85
import ctypes
67
86
import ctypes.util
68
69
version = "1.0.8"
70
71
logger = logging.Logger('mandos')
72
syslogger = (logging.handlers.SysLogHandler
73
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
74
address = "/dev/log"))
75
syslogger.setFormatter(logging.Formatter
76
('Mandos [%(process)d]: %(levelname)s:'
77
' %(message)s'))
78
logger.addHandler(syslogger)
79
80
console = logging.StreamHandler()
81
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
82
' %(levelname)s: %(message)s'))
83
logger.addHandler(console)
87
import xml.dom.minidom
88
import inspect
89
90
# Try to find the value of SO_BINDTODEVICE:
91
try:
92
# This is where SO_BINDTODEVICE is in Python 3.3 (or 3.4?) and
93
# newer, and it is also the most natural place for it:
94
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
95
except AttributeError:
96
try:
97
# This is where SO_BINDTODEVICE was up to and including Python
98
# 2.6, and also 3.2:
99
from IN import SO_BINDTODEVICE
100
except ImportError:
101
# In Python 2.7 it seems to have been removed entirely.
102
# Try running the C preprocessor:
103
try:
104
cc = subprocess.Popen(["cc", "--language=c", "-E",
105
"/dev/stdin"],
106
stdin=subprocess.PIPE,
107
stdout=subprocess.PIPE)
108
stdout = cc.communicate(
109
"#include <sys/socket.h>\nSO_BINDTODEVICE\n")[0]
110
SO_BINDTODEVICE = int(stdout.splitlines()[-1])
111
except (OSError, ValueError, IndexError):
112
# No value found
113
SO_BINDTODEVICE = None
114
115
if sys.version_info.major == 2:
116
str = unicode
117
118
version = "1.7.19"
119
stored_state_file = "clients.pickle"
120
121
logger = logging.getLogger()
122
syslogger = None
123
124
try:
125
if_nametoindex = ctypes.cdll.LoadLibrary(
126
ctypes.util.find_library("c")).if_nametoindex
127
except (OSError, AttributeError):
128
129
def if_nametoindex(interface):
130
"Get an interface index the hard way, i.e. using fcntl()"
131
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
132
with contextlib.closing(socket.socket()) as s:
133
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
134
struct.pack(b"16s16x", interface))
135
interface_index = struct.unpack("I", ifreq[16:20])[0]
136
return interface_index
137
138
139
def copy_function(func):
140
"""Make a copy of a function"""
141
if sys.version_info.major == 2:
142
return types.FunctionType(func.func_code,
143
func.func_globals,
144
func.func_name,
145
func.func_defaults,
146
func.func_closure)
147
else:
148
return types.FunctionType(func.__code__,
149
func.__globals__,
150
func.__name__,
151
func.__defaults__,
152
func.__closure__)
153
154
155
def initlogger(debug, level=logging.WARNING):
156
"""init logger and add loglevel"""
157
158
global syslogger
159
syslogger = (logging.handlers.SysLogHandler(
160
facility=logging.handlers.SysLogHandler.LOG_DAEMON,
161
address="/dev/log"))
162
syslogger.setFormatter(logging.Formatter
163
('Mandos [%(process)d]: %(levelname)s:'
164
' %(message)s'))
165
logger.addHandler(syslogger)
166
167
if debug:
168
console = logging.StreamHandler()
169
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
170
' [%(process)d]:'
171
' %(levelname)s:'
172
' %(message)s'))
173
logger.addHandler(console)
174
logger.setLevel(level)
175
176
177
class PGPError(Exception):
178
"""Exception if encryption/decryption fails"""
179
pass
180
181
182
class PGPEngine(object):
183
"""A simple class for OpenPGP symmetric encryption & decryption"""
184
185
def __init__(self):
186
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
187
self.gpg = "gpg"
188
try:
189
output = subprocess.check_output(["gpgconf"])
190
for line in output.splitlines():
191
name, text, path = line.split(b":")
192
if name == "gpg":
193
self.gpg = path
194
break
195
except OSError as e:
196
if e.errno != errno.ENOENT:
197
raise
198
self.gnupgargs = ['--batch',
199
'--homedir', self.tempdir,
200
'--force-mdc',
201
'--quiet']
202
# Only GPG version 1 has the --no-use-agent option.
203
if self.gpg == "gpg" or self.gpg.endswith("/gpg"):
204
self.gnupgargs.append("--no-use-agent")
205
206
def __enter__(self):
207
return self
208
209
def __exit__(self, exc_type, exc_value, traceback):
210
self._cleanup()
211
return False
212
213
def __del__(self):
214
self._cleanup()
215
216
def _cleanup(self):
217
if self.tempdir is not None:
218
# Delete contents of tempdir
219
for root, dirs, files in os.walk(self.tempdir,
220
topdown=False):
221
for filename in files:
222
os.remove(os.path.join(root, filename))
223
for dirname in dirs:
224
os.rmdir(os.path.join(root, dirname))
225
# Remove tempdir
226
os.rmdir(self.tempdir)
227
self.tempdir = None
228
229
def password_encode(self, password):
230
# Passphrase can not be empty and can not contain newlines or
231
# NUL bytes. So we prefix it and hex encode it.
232
encoded = b"mandos" + binascii.hexlify(password)
233
if len(encoded) > 2048:
234
# GnuPG can't handle long passwords, so encode differently
235
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
236
.replace(b"\n", b"\\n")
237
.replace(b"\0", b"\\x00"))
238
return encoded
239
240
def encrypt(self, data, password):
241
passphrase = self.password_encode(password)
242
with tempfile.NamedTemporaryFile(
243
dir=self.tempdir) as passfile:
244
passfile.write(passphrase)
245
passfile.flush()
246
proc = subprocess.Popen([self.gpg, '--symmetric',
247
'--passphrase-file',
248
passfile.name]
249
+ self.gnupgargs,
250
stdin=subprocess.PIPE,
251
stdout=subprocess.PIPE,
252
stderr=subprocess.PIPE)
253
ciphertext, err = proc.communicate(input=data)
254
if proc.returncode != 0:
255
raise PGPError(err)
256
return ciphertext
257
258
def decrypt(self, data, password):
259
passphrase = self.password_encode(password)
260
with tempfile.NamedTemporaryFile(
261
dir=self.tempdir) as passfile:
262
passfile.write(passphrase)
263
passfile.flush()
264
proc = subprocess.Popen([self.gpg, '--decrypt',
265
'--passphrase-file',
266
passfile.name]
267
+ self.gnupgargs,
268
stdin=subprocess.PIPE,
269
stdout=subprocess.PIPE,
270
stderr=subprocess.PIPE)
271
decrypted_plaintext, err = proc.communicate(input=data)
272
if proc.returncode != 0:
273
raise PGPError(err)
274
return decrypted_plaintext
275
276
277
# Pretend that we have an Avahi module
278
class Avahi(object):
279
"""This isn't so much a class as it is a module-like namespace.
280
It is instantiated once, and simulates having an Avahi module."""
281
IF_UNSPEC = -1 # avahi-common/address.h
282
PROTO_UNSPEC = -1 # avahi-common/address.h
283
PROTO_INET = 0 # avahi-common/address.h
284
PROTO_INET6 = 1 # avahi-common/address.h
285
DBUS_NAME = "org.freedesktop.Avahi"
286
DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"
287
DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"
288
DBUS_PATH_SERVER = "/"
289
290
def string_array_to_txt_array(self, t):
291
return dbus.Array((dbus.ByteArray(s.encode("utf-8"))
292
for s in t), signature="ay")
293
ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h
294
ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h
295
ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h
296
SERVER_INVALID = 0 # avahi-common/defs.h
297
SERVER_REGISTERING = 1 # avahi-common/defs.h
298
SERVER_RUNNING = 2 # avahi-common/defs.h
299
SERVER_COLLISION = 3 # avahi-common/defs.h
300
SERVER_FAILURE = 4 # avahi-common/defs.h
301
avahi = Avahi()
302
84
303
85
304
class AvahiError(Exception):
86
305
def __init__(self, value, *args, **kwargs):
87
306
self.value = value
88
super(AvahiError, self).__init__(value, *args, **kwargs)
89
def __unicode__(self):
90
return unicode(repr(self.value))
307
return super(AvahiError, self).__init__(value, *args,
308
**kwargs)
309
91
310
92
311
class AvahiServiceError(AvahiError):
93
312
pass
94
313
314
95
315
class AvahiGroupError(AvahiError):
96
316
pass
97
317
98
318
99
319
class AvahiService(object):
100
320
"""An Avahi (Zeroconf) service.
321
101
322
Attributes:
102
323
interface: integer; avahi.IF_UNSPEC or an interface index.
103
324
Used to optionally bind to the specified interface.
104
325
name: string; Example: 'Mandos'
105
326
type: string; Example: '_mandos._tcp'.
106
See <http://www.dns-sd.org/ServiceTypes.html>
327
See <https://www.iana.org/assignments/service-names-port-numbers>
107
328
port: integer; what port to announce
108
329
TXT: list of strings; TXT record for the service
109
330
domain: string; Domain to publish on, default to .local if empty.
111
332
max_renames: integer; maximum number of renames
112
333
rename_count: integer; counter so we only rename after collisions
113
334
a sensible number of times
335
group: D-Bus Entry Group
336
server: D-Bus Server
337
bus: dbus.SystemBus()
114
338
"""
115
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
116
servicetype = None, port = None, TXT = None,
117
domain = "", host = "", max_renames = 32768,
118
protocol = avahi.PROTO_UNSPEC):
339
340
def __init__(self,
341
interface=avahi.IF_UNSPEC,
342
name=None,
343
servicetype=None,
344
port=None,
345
TXT=None,
346
domain="",
347
host="",
348
max_renames=32768,
349
protocol=avahi.PROTO_UNSPEC,
350
bus=None):
119
351
self.interface = interface
120
352
self.name = name
121
353
self.type = servicetype
126
358
self.rename_count = 0
127
359
self.max_renames = max_renames
128
360
self.protocol = protocol
129
def rename(self):
361
self.group = None # our entry group
362
self.server = None
363
self.bus = bus
364
self.entry_group_state_changed_match = None
365
366
def rename(self, remove=True):
130
367
"""Derived from the Avahi example code"""
131
368
if self.rename_count >= self.max_renames:
132
logger.critical(u"No suitable Zeroconf service name found"
133
u" after %i retries, exiting.",
369
logger.critical("No suitable Zeroconf service name found"
370
" after %i retries, exiting.",
134
371
self.rename_count)
135
raise AvahiServiceError(u"Too many renames")
136
self.name = server.GetAlternativeServiceName(self.name)
137
logger.info(u"Changing Zeroconf service name to %r ...",
138
str(self.name))
139
syslogger.setFormatter(logging.Formatter
140
('Mandos (%s) [%%(process)d]:'
141
' %%(levelname)s: %%(message)s'
142
% self.name))
143
self.remove()
144
self.add()
372
raise AvahiServiceError("Too many renames")
373
self.name = str(
374
self.server.GetAlternativeServiceName(self.name))
145
375
self.rename_count += 1
376
logger.info("Changing Zeroconf service name to %r ...",
377
self.name)
378
if remove:
379
self.remove()
380
try:
381
self.add()
382
except dbus.exceptions.DBusException as error:
383
if (error.get_dbus_name()
384
== "org.freedesktop.Avahi.CollisionError"):
385
logger.info("Local Zeroconf service name collision.")
386
return self.rename(remove=False)
387
else:
388
logger.critical("D-Bus Exception", exc_info=error)
389
self.cleanup()
390
os._exit(1)
391
146
392
def remove(self):
147
393
"""Derived from the Avahi example code"""
148
if group is not None:
149
group.Reset()
394
if self.entry_group_state_changed_match is not None:
395
self.entry_group_state_changed_match.remove()
396
self.entry_group_state_changed_match = None
397
if self.group is not None:
398
self.group.Reset()
399
150
400
def add(self):
151
401
"""Derived from the Avahi example code"""
152
global group
153
if group is None:
154
group = dbus.Interface(bus.get_object
155
(avahi.DBUS_NAME,
156
server.EntryGroupNew()),
157
avahi.DBUS_INTERFACE_ENTRY_GROUP)
158
group.connect_to_signal('StateChanged',
159
entry_group_state_changed)
160
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
161
service.name, service.type)
162
group.AddService(
163
self.interface, # interface
164
self.protocol, # protocol
165
dbus.UInt32(0), # flags
166
self.name, self.type,
167
self.domain, self.host,
168
dbus.UInt16(self.port),
169
avahi.string_array_to_txt_array(self.TXT))
170
group.Commit()
171
172
# From the Avahi example code:
173
group = None # our entry group
174
# End of Avahi example code
175
176
177
def _datetime_to_dbus(dt, variant_level=0):
178
"""Convert a UTC datetime.datetime() to a D-Bus type."""
179
return dbus.String(dt.isoformat(), variant_level=variant_level)
402
self.remove()
403
if self.group is None:
404
self.group = dbus.Interface(
405
self.bus.get_object(avahi.DBUS_NAME,
406
self.server.EntryGroupNew()),
407
avahi.DBUS_INTERFACE_ENTRY_GROUP)
408
self.entry_group_state_changed_match = (
409
self.group.connect_to_signal(
410
'StateChanged', self.entry_group_state_changed))
411
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
412
self.name, self.type)
413
self.group.AddService(
414
self.interface,
415
self.protocol,
416
dbus.UInt32(0), # flags
417
self.name, self.type,
418
self.domain, self.host,
419
dbus.UInt16(self.port),
420
avahi.string_array_to_txt_array(self.TXT))
421
self.group.Commit()
422
423
def entry_group_state_changed(self, state, error):
424
"""Derived from the Avahi example code"""
425
logger.debug("Avahi entry group state change: %i", state)
426
427
if state == avahi.ENTRY_GROUP_ESTABLISHED:
428
logger.debug("Zeroconf service established.")
429
elif state == avahi.ENTRY_GROUP_COLLISION:
430
logger.info("Zeroconf service name collision.")
431
self.rename()
432
elif state == avahi.ENTRY_GROUP_FAILURE:
433
logger.critical("Avahi: Error in group state changed %s",
434
str(error))
435
raise AvahiGroupError("State changed: {!s}".format(error))
436
437
def cleanup(self):
438
"""Derived from the Avahi example code"""
439
if self.group is not None:
440
try:
441
self.group.Free()
442
except (dbus.exceptions.UnknownMethodException,
443
dbus.exceptions.DBusException):
444
pass
445
self.group = None
446
self.remove()
447
448
def server_state_changed(self, state, error=None):
449
"""Derived from the Avahi example code"""
450
logger.debug("Avahi server state change: %i", state)
451
bad_states = {
452
avahi.SERVER_INVALID: "Zeroconf server invalid",
453
avahi.SERVER_REGISTERING: None,
454
avahi.SERVER_COLLISION: "Zeroconf server name collision",
455
avahi.SERVER_FAILURE: "Zeroconf server failure",
456
}
457
if state in bad_states:
458
if bad_states[state] is not None:
459
if error is None:
460
logger.error(bad_states[state])
461
else:
462
logger.error(bad_states[state] + ": %r", error)
463
self.cleanup()
464
elif state == avahi.SERVER_RUNNING:
465
try:
466
self.add()
467
except dbus.exceptions.DBusException as error:
468
if (error.get_dbus_name()
469
== "org.freedesktop.Avahi.CollisionError"):
470
logger.info("Local Zeroconf service name"
471
" collision.")
472
return self.rename(remove=False)
473
else:
474
logger.critical("D-Bus Exception", exc_info=error)
475
self.cleanup()
476
os._exit(1)
477
else:
478
if error is None:
479
logger.debug("Unknown state: %r", state)
480
else:
481
logger.debug("Unknown state: %r: %r", state, error)
482
483
def activate(self):
484
"""Derived from the Avahi example code"""
485
if self.server is None:
486
self.server = dbus.Interface(
487
self.bus.get_object(avahi.DBUS_NAME,
488
avahi.DBUS_PATH_SERVER,
489
follow_name_owner_changes=True),
490
avahi.DBUS_INTERFACE_SERVER)
491
self.server.connect_to_signal("StateChanged",
492
self.server_state_changed)
493
self.server_state_changed(self.server.GetState())
494
495
496
class AvahiServiceToSyslog(AvahiService):
497
def rename(self, *args, **kwargs):
498
"""Add the new name to the syslog messages"""
499
ret = super(AvahiServiceToSyslog, self).rename(*args, **kwargs)
500
syslogger.setFormatter(logging.Formatter(
501
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
502
.format(self.name)))
503
return ret
504
505
506
# Pretend that we have a GnuTLS module
507
class GnuTLS(object):
508
"""This isn't so much a class as it is a module-like namespace.
509
It is instantiated once, and simulates having a GnuTLS module."""
510
511
library = ctypes.util.find_library("gnutls")
512
if library is None:
513
library = ctypes.util.find_library("gnutls-deb0")
514
_library = ctypes.cdll.LoadLibrary(library)
515
del library
516
_need_version = b"3.3.0"
517
518
def __init__(self):
519
# Need to use "self" here, since this method is called before
520
# the assignment to the "gnutls" global variable happens.
521
if self.check_version(self._need_version) is None:
522
raise self.Error("Needs GnuTLS {} or later"
523
.format(self._need_version))
524
525
# Unless otherwise indicated, the constants and types below are
526
# all from the gnutls/gnutls.h C header file.
527
528
# Constants
529
E_SUCCESS = 0
530
E_INTERRUPTED = -52
531
E_AGAIN = -28
532
CRT_OPENPGP = 2
533
CLIENT = 2
534
SHUT_RDWR = 0
535
CRD_CERTIFICATE = 1
536
E_NO_CERTIFICATE_FOUND = -49
537
OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
538
539
# Types
540
class session_int(ctypes.Structure):
541
_fields_ = []
542
session_t = ctypes.POINTER(session_int)
543
544
class certificate_credentials_st(ctypes.Structure):
545
_fields_ = []
546
certificate_credentials_t = ctypes.POINTER(
547
certificate_credentials_st)
548
certificate_type_t = ctypes.c_int
549
550
class datum_t(ctypes.Structure):
551
_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
552
('size', ctypes.c_uint)]
553
554
class openpgp_crt_int(ctypes.Structure):
555
_fields_ = []
556
openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
557
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
558
log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
559
credentials_type_t = ctypes.c_int
560
transport_ptr_t = ctypes.c_void_p
561
close_request_t = ctypes.c_int
562
563
# Exceptions
564
class Error(Exception):
565
# We need to use the class name "GnuTLS" here, since this
566
# exception might be raised from within GnuTLS.__init__,
567
# which is called before the assignment to the "gnutls"
568
# global variable has happened.
569
def __init__(self, message=None, code=None, args=()):
570
# Default usage is by a message string, but if a return
571
# code is passed, convert it to a string with
572
# gnutls.strerror()
573
self.code = code
574
if message is None and code is not None:
575
message = GnuTLS.strerror(code)
576
return super(GnuTLS.Error, self).__init__(
577
message, *args)
578
579
class CertificateSecurityError(Error):
580
pass
581
582
# Classes
583
class Credentials(object):
584
def __init__(self):
585
self._c_object = gnutls.certificate_credentials_t()
586
gnutls.certificate_allocate_credentials(
587
ctypes.byref(self._c_object))
588
self.type = gnutls.CRD_CERTIFICATE
589
590
def __del__(self):
591
gnutls.certificate_free_credentials(self._c_object)
592
593
class ClientSession(object):
594
def __init__(self, socket, credentials=None):
595
self._c_object = gnutls.session_t()
596
gnutls.init(ctypes.byref(self._c_object), gnutls.CLIENT)
597
gnutls.set_default_priority(self._c_object)
598
gnutls.transport_set_ptr(self._c_object, socket.fileno())
599
gnutls.handshake_set_private_extensions(self._c_object,
600
True)
601
self.socket = socket
602
if credentials is None:
603
credentials = gnutls.Credentials()
604
gnutls.credentials_set(self._c_object, credentials.type,
605
ctypes.cast(credentials._c_object,
606
ctypes.c_void_p))
607
self.credentials = credentials
608
609
def __del__(self):
610
gnutls.deinit(self._c_object)
611
612
def handshake(self):
613
return gnutls.handshake(self._c_object)
614
615
def send(self, data):
616
data = bytes(data)
617
data_len = len(data)
618
while data_len > 0:
619
data_len -= gnutls.record_send(self._c_object,
620
data[-data_len:],
621
data_len)
622
623
def bye(self):
624
return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
625
626
# Error handling functions
627
def _error_code(result):
628
"""A function to raise exceptions on errors, suitable
629
for the 'restype' attribute on ctypes functions"""
630
if result >= 0:
631
return result
632
if result == gnutls.E_NO_CERTIFICATE_FOUND:
633
raise gnutls.CertificateSecurityError(code=result)
634
raise gnutls.Error(code=result)
635
636
def _retry_on_error(result, func, arguments):
637
"""A function to retry on some errors, suitable
638
for the 'errcheck' attribute on ctypes functions"""
639
while result < 0:
640
if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
641
return _error_code(result)
642
result = func(*arguments)
643
return result
644
645
# Unless otherwise indicated, the function declarations below are
646
# all from the gnutls/gnutls.h C header file.
647
648
# Functions
649
priority_set_direct = _library.gnutls_priority_set_direct
650
priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
651
ctypes.POINTER(ctypes.c_char_p)]
652
priority_set_direct.restype = _error_code
653
654
init = _library.gnutls_init
655
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
656
init.restype = _error_code
657
658
set_default_priority = _library.gnutls_set_default_priority
659
set_default_priority.argtypes = [session_t]
660
set_default_priority.restype = _error_code
661
662
record_send = _library.gnutls_record_send
663
record_send.argtypes = [session_t, ctypes.c_void_p,
664
ctypes.c_size_t]
665
record_send.restype = ctypes.c_ssize_t
666
record_send.errcheck = _retry_on_error
667
668
certificate_allocate_credentials = (
669
_library.gnutls_certificate_allocate_credentials)
670
certificate_allocate_credentials.argtypes = [
671
ctypes.POINTER(certificate_credentials_t)]
672
certificate_allocate_credentials.restype = _error_code
673
674
certificate_free_credentials = (
675
_library.gnutls_certificate_free_credentials)
676
certificate_free_credentials.argtypes = [
677
certificate_credentials_t]
678
certificate_free_credentials.restype = None
679
680
handshake_set_private_extensions = (
681
_library.gnutls_handshake_set_private_extensions)
682
handshake_set_private_extensions.argtypes = [session_t,
683
ctypes.c_int]
684
handshake_set_private_extensions.restype = None
685
686
credentials_set = _library.gnutls_credentials_set
687
credentials_set.argtypes = [session_t, credentials_type_t,
688
ctypes.c_void_p]
689
credentials_set.restype = _error_code
690
691
strerror = _library.gnutls_strerror
692
strerror.argtypes = [ctypes.c_int]
693
strerror.restype = ctypes.c_char_p
694
695
certificate_type_get = _library.gnutls_certificate_type_get
696
certificate_type_get.argtypes = [session_t]
697
certificate_type_get.restype = _error_code
698
699
certificate_get_peers = _library.gnutls_certificate_get_peers
700
certificate_get_peers.argtypes = [session_t,
701
ctypes.POINTER(ctypes.c_uint)]
702
certificate_get_peers.restype = ctypes.POINTER(datum_t)
703
704
global_set_log_level = _library.gnutls_global_set_log_level
705
global_set_log_level.argtypes = [ctypes.c_int]
706
global_set_log_level.restype = None
707
708
global_set_log_function = _library.gnutls_global_set_log_function
709
global_set_log_function.argtypes = [log_func]
710
global_set_log_function.restype = None
711
712
deinit = _library.gnutls_deinit
713
deinit.argtypes = [session_t]
714
deinit.restype = None
715
716
handshake = _library.gnutls_handshake
717
handshake.argtypes = [session_t]
718
handshake.restype = _error_code
719
handshake.errcheck = _retry_on_error
720
721
transport_set_ptr = _library.gnutls_transport_set_ptr
722
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
723
transport_set_ptr.restype = None
724
725
bye = _library.gnutls_bye
726
bye.argtypes = [session_t, close_request_t]
727
bye.restype = _error_code
728
bye.errcheck = _retry_on_error
729
730
check_version = _library.gnutls_check_version
731
check_version.argtypes = [ctypes.c_char_p]
732
check_version.restype = ctypes.c_char_p
733
734
# All the function declarations below are from gnutls/openpgp.h
735
736
openpgp_crt_init = _library.gnutls_openpgp_crt_init
737
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
738
openpgp_crt_init.restype = _error_code
739
740
openpgp_crt_import = _library.gnutls_openpgp_crt_import
741
openpgp_crt_import.argtypes = [openpgp_crt_t,
742
ctypes.POINTER(datum_t),
743
openpgp_crt_fmt_t]
744
openpgp_crt_import.restype = _error_code
745
746
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
747
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
748
ctypes.POINTER(ctypes.c_uint)]
749
openpgp_crt_verify_self.restype = _error_code
750
751
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
752
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
753
openpgp_crt_deinit.restype = None
754
755
openpgp_crt_get_fingerprint = (
756
_library.gnutls_openpgp_crt_get_fingerprint)
757
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
758
ctypes.c_void_p,
759
ctypes.POINTER(
760
ctypes.c_size_t)]
761
openpgp_crt_get_fingerprint.restype = _error_code
762
763
# Remove non-public functions
764
del _error_code, _retry_on_error
765
# Create the global "gnutls" object, simulating a module
766
gnutls = GnuTLS()
767
768
769
def call_pipe(connection, # : multiprocessing.Connection
770
func, *args, **kwargs):
771
"""This function is meant to be called by multiprocessing.Process
772
773
This function runs func(*args, **kwargs), and writes the resulting
774
return value on the provided multiprocessing.Connection.
775
"""
776
connection.send(func(*args, **kwargs))
777
connection.close()
180
778
181
779
182
780
class Client(object):
183
781
"""A representation of a client host served by this server.
782
184
783
Attributes:
185
name: string; from the config file, used in log messages and
186
D-Bus identifiers
187
fingerprint: string (40 or 32 hexadecimal digits); used to
188
uniquely identify the client
189
secret: bytestring; sent verbatim (over TLS) to client
190
host: string; available for use by the checker command
191
created: datetime.datetime(); (UTC) object creation
192
last_enabled: datetime.datetime(); (UTC)
193
enabled: bool()
194
last_checked_ok: datetime.datetime(); (UTC) or None
195
timeout: datetime.timedelta(); How long from last_checked_ok
196
until this client is invalid
197
interval: datetime.timedelta(); How often to start a new checker
198
disable_hook: If set, called by disable() as disable_hook(self)
784
approved: bool(); 'None' if not yet approved/disapproved
785
approval_delay: datetime.timedelta(); Time to wait for approval
786
approval_duration: datetime.timedelta(); Duration of one approval
199
787
checker: subprocess.Popen(); a running checker process used
200
788
to see if the client lives.
201
789
'None' if no process is running.
202
checker_initiator_tag: a gobject event source tag, or None
203
disable_initiator_tag: - '' -
204
checker_callback_tag: - '' -
205
checker_command: string; External command which is run to check if
206
client lives. %() expansions are done at
790
checker_callback_tag: a GLib event source tag, or None
791
checker_command: string; External command which is run to check
792
if client lives. %() expansions are done at
207
793
runtime with vars(self) as dict, so that for
208
794
instance %(name)s can be used in the command.
795
checker_initiator_tag: a GLib event source tag, or None
796
created: datetime.datetime(); (UTC) object creation
797
client_structure: Object describing what attributes a client has
798
and is used for storing the client at exit
209
799
current_checker_command: string; current running checker_command
800
disable_initiator_tag: a GLib event source tag, or None
801
enabled: bool()
802
fingerprint: string (40 or 32 hexadecimal digits); used to
803
uniquely identify the client
804
host: string; available for use by the checker command
805
interval: datetime.timedelta(); How often to start a new checker
806
last_approval_request: datetime.datetime(); (UTC) or None
807
last_checked_ok: datetime.datetime(); (UTC) or None
808
last_checker_status: integer between 0 and 255 reflecting exit
809
status of last checker. -1 reflects crashed
810
checker, -2 means no checker completed yet.
811
last_checker_signal: The signal which killed the last checker, if
812
last_checker_status is -1
813
last_enabled: datetime.datetime(); (UTC) or None
814
name: string; from the config file, used in log messages and
815
D-Bus identifiers
816
secret: bytestring; sent verbatim (over TLS) to client
817
timeout: datetime.timedelta(); How long from last_checked_ok
818
until this client is disabled
819
extended_timeout: extra long timeout when secret has been sent
820
runtime_expansions: Allowed attributes for runtime expansion.
821
expires: datetime.datetime(); time (UTC) when a client will be
822
disabled, or None
823
server_settings: The server_settings dict from main()
210
824
"""
211
def timeout_milliseconds(self):
212
"Return the 'timeout' attribute in milliseconds"
213
return ((self.timeout.days * 24 * 60 * 60 * 1000)
214
+ (self.timeout.seconds * 1000)
215
+ (self.timeout.microseconds // 1000))
216
217
def interval_milliseconds(self):
218
"Return the 'interval' attribute in milliseconds"
219
return ((self.interval.days * 24 * 60 * 60 * 1000)
220
+ (self.interval.seconds * 1000)
221
+ (self.interval.microseconds // 1000))
222
223
def __init__(self, name = None, disable_hook=None, config=None):
224
"""Note: the 'checker' key in 'config' sets the
225
'checker_command' attribute and *not* the 'checker'
226
attribute."""
825
826
runtime_expansions = ("approval_delay", "approval_duration",
827
"created", "enabled", "expires",
828
"fingerprint", "host", "interval",
829
"last_approval_request", "last_checked_ok",
830
"last_enabled", "name", "timeout")
831
client_defaults = {
832
"timeout": "PT5M",
833
"extended_timeout": "PT15M",
834
"interval": "PT2M",
835
"checker": "fping -q -- %%(host)s",
836
"host": "",
837
"approval_delay": "PT0S",
838
"approval_duration": "PT1S",
839
"approved_by_default": "True",
840
"enabled": "True",
841
}
842
843
@staticmethod
844
def config_parser(config):
845
"""Construct a new dict of client settings of this form:
846
{ client_name: {setting_name: value, ...}, ...}
847
with exceptions for any special settings as defined above.
848
NOTE: Must be a pure function. Must return the same result
849
value given the same arguments.
850
"""
851
settings = {}
852
for client_name in config.sections():
853
section = dict(config.items(client_name))
854
client = settings[client_name] = {}
855
856
client["host"] = section["host"]
857
# Reformat values from string types to Python types
858
client["approved_by_default"] = config.getboolean(
859
client_name, "approved_by_default")
860
client["enabled"] = config.getboolean(client_name,
861
"enabled")
862
863
# Uppercase and remove spaces from fingerprint for later
864
# comparison purposes with return value from the
865
# fingerprint() function
866
client["fingerprint"] = (section["fingerprint"].upper()
867
.replace(" ", ""))
868
if "secret" in section:
869
client["secret"] = codecs.decode(section["secret"]
870
.encode("utf-8"),
871
"base64")
872
elif "secfile" in section:
873
with open(os.path.expanduser(os.path.expandvars
874
(section["secfile"])),
875
"rb") as secfile:
876
client["secret"] = secfile.read()
877
else:
878
raise TypeError("No secret or secfile for section {}"
879
.format(section))
880
client["timeout"] = string_to_delta(section["timeout"])
881
client["extended_timeout"] = string_to_delta(
882
section["extended_timeout"])
883
client["interval"] = string_to_delta(section["interval"])
884
client["approval_delay"] = string_to_delta(
885
section["approval_delay"])
886
client["approval_duration"] = string_to_delta(
887
section["approval_duration"])
888
client["checker_command"] = section["checker"]
889
client["last_approval_request"] = None
890
client["last_checked_ok"] = None
891
client["last_checker_status"] = -2
892
893
return settings
894
895
def __init__(self, settings, name=None, server_settings=None):
227
896
self.name = name
228
if config is None:
229
config = {}
230
logger.debug(u"Creating client %r", self.name)
231
# Uppercase and remove spaces from fingerprint for later
232
# comparison purposes with return value from the fingerprint()
233
# function
234
self.fingerprint = (config["fingerprint"].upper()
235
.replace(u" ", u""))
236
logger.debug(u" Fingerprint: %s", self.fingerprint)
237
if "secret" in config:
238
self.secret = config["secret"].decode(u"base64")
239
elif "secfile" in config:
240
with closing(open(os.path.expanduser
241
(os.path.expandvars
242
(config["secfile"])))) as secfile:
243
self.secret = secfile.read()
897
if server_settings is None:
898
server_settings = {}
899
self.server_settings = server_settings
900
# adding all client settings
901
for setting, value in settings.items():
902
setattr(self, setting, value)
903
904
if self.enabled:
905
if not hasattr(self, "last_enabled"):
906
self.last_enabled = datetime.datetime.utcnow()
907
if not hasattr(self, "expires"):
908
self.expires = (datetime.datetime.utcnow()
909
+ self.timeout)
244
910
else:
245
raise TypeError(u"No secret or secfile for client %s"
246
% self.name)
247
self.host = config.get("host", "")
248
self.created = datetime.datetime.utcnow()
249
self.enabled = False
250
self.last_enabled = None
251
self.last_checked_ok = None
252
self.timeout = string_to_delta(config["timeout"])
253
self.interval = string_to_delta(config["interval"])
254
self.disable_hook = disable_hook
911
self.last_enabled = None
912
self.expires = None
913
914
logger.debug("Creating client %r", self.name)
915
logger.debug(" Fingerprint: %s", self.fingerprint)
916
self.created = settings.get("created",
917
datetime.datetime.utcnow())
918
919
# attributes specific for this server instance
255
920
self.checker = None
256
921
self.checker_initiator_tag = None
257
922
self.disable_initiator_tag = None
258
923
self.checker_callback_tag = None
259
self.checker_command = config["checker"]
260
924
self.current_checker_command = None
261
self.last_connect = None
262
925
self.approved = None
926
self.approvals_pending = 0
927
self.changedstate = multiprocessing_manager.Condition(
928
multiprocessing_manager.Lock())
929
self.client_structure = [attr
930
for attr in self.__dict__.keys()
931
if not attr.startswith("_")]
932
self.client_structure.append("client_structure")
933
934
for name, t in inspect.getmembers(
935
type(self), lambda obj: isinstance(obj, property)):
936
if not name.startswith("_"):
937
self.client_structure.append(name)
938
939
# Send notice to process children that client state has changed
940
def send_changedstate(self):
941
with self.changedstate:
942
self.changedstate.notify_all()
943
263
944
def enable(self):
264
945
"""Start this client's checker and timeout hooks"""
946
if getattr(self, "enabled", False):
947
# Already enabled
948
return
949
self.expires = datetime.datetime.utcnow() + self.timeout
950
self.enabled = True
265
951
self.last_enabled = datetime.datetime.utcnow()
952
self.init_checker()
953
self.send_changedstate()
954
955
def disable(self, quiet=True):
956
"""Disable this client."""
957
if not getattr(self, "enabled", False):
958
return False
959
if not quiet:
960
logger.info("Disabling client %s", self.name)
961
if getattr(self, "disable_initiator_tag", None) is not None:
962
GLib.source_remove(self.disable_initiator_tag)
963
self.disable_initiator_tag = None
964
self.expires = None
965
if getattr(self, "checker_initiator_tag", None) is not None:
966
GLib.source_remove(self.checker_initiator_tag)
967
self.checker_initiator_tag = None
968
self.stop_checker()
969
self.enabled = False
970
if not quiet:
971
self.send_changedstate()
972
# Do not run this again if called by a GLib.timeout_add
973
return False
974
975
def __del__(self):
976
self.disable()
977
978
def init_checker(self):
266
979
# Schedule a new checker to be started an 'interval' from now,
267
980
# and every interval from then on.
268
self.checker_initiator_tag = (gobject.timeout_add
269
(self.interval_milliseconds(),
270
self.start_checker))
981
if self.checker_initiator_tag is not None:
982
GLib.source_remove(self.checker_initiator_tag)
983
self.checker_initiator_tag = GLib.timeout_add(
984
int(self.interval.total_seconds() * 1000),
985
self.start_checker)
986
# Schedule a disable() when 'timeout' has passed
987
if self.disable_initiator_tag is not None:
988
GLib.source_remove(self.disable_initiator_tag)
989
self.disable_initiator_tag = GLib.timeout_add(
990
int(self.timeout.total_seconds() * 1000), self.disable)
271
991
# Also start a new checker *right now*.
272
992
self.start_checker()
273
# Schedule a disable() when 'timeout' has passed
274
self.disable_initiator_tag = (gobject.timeout_add
275
(self.timeout_milliseconds(),
276
self.disable))
277
self.enabled = True
278
279
def disable(self):
280
"""Disable this client."""
281
if not getattr(self, "enabled", False):
282
return False
283
logger.info(u"Disabling client %s", self.name)
284
if getattr(self, "disable_initiator_tag", False):
285
gobject.source_remove(self.disable_initiator_tag)
286
self.disable_initiator_tag = None
287
if getattr(self, "checker_initiator_tag", False):
288
gobject.source_remove(self.checker_initiator_tag)
289
self.checker_initiator_tag = None
290
self.stop_checker()
291
if self.disable_hook:
292
self.disable_hook(self)
293
self.enabled = False
294
# Do not run this again if called by a gobject.timeout_add
295
return False
296
297
def __del__(self):
298
self.disable_hook = None
299
self.disable()
300
301
def checker_callback(self, pid, condition, command):
993
994
def checker_callback(self, source, condition, connection,
995
command):
302
996
"""The checker has completed, so take appropriate actions."""
303
997
self.checker_callback_tag = None
304
998
self.checker = None
305
if os.WIFEXITED(condition):
306
exitstatus = os.WEXITSTATUS(condition)
307
if exitstatus == 0:
308
logger.info(u"Checker for %(name)s succeeded",
999
# Read return code from connection (see call_pipe)
1000
returncode = connection.recv()
1001
connection.close()
1002
1003
if returncode >= 0:
1004
self.last_checker_status = returncode
1005
self.last_checker_signal = None
1006
if self.last_checker_status == 0:
1007
logger.info("Checker for %(name)s succeeded",
309
1008
vars(self))
310
1009
self.checked_ok()
311
1010
else:
312
logger.info(u"Checker for %(name)s failed",
313
vars(self))
1011
logger.info("Checker for %(name)s failed", vars(self))
314
1012
else:
315
logger.warning(u"Checker for %(name)s crashed?",
1013
self.last_checker_status = -1
1014
self.last_checker_signal = -returncode
1015
logger.warning("Checker for %(name)s crashed?",
316
1016
vars(self))
317
1017
return False
1018
318
1019
def checked_ok(self):
319
"""Bump up the timeout for this client.
320
This should only be called when the client has been seen,
321
alive and well.
322
"""
1020
"""Assert that the client has been seen, alive and well."""
323
1021
self.last_checked_ok = datetime.datetime.utcnow()
324
gobject.source_remove(self.disable_initiator_tag)
325
self.disable_initiator_tag = (gobject.timeout_add
326
(self.timeout_milliseconds(),
327
self.disable))
328
1022
self.last_checker_status = 0
1023
self.last_checker_signal = None
1024
self.bump_timeout()
1025
1026
def bump_timeout(self, timeout=None):
1027
"""Bump up the timeout for this client."""
1028
if timeout is None:
1029
timeout = self.timeout
1030
if self.disable_initiator_tag is not None:
1031
GLib.source_remove(self.disable_initiator_tag)
1032
self.disable_initiator_tag = None
1033
if getattr(self, "enabled", False):
1034
self.disable_initiator_tag = GLib.timeout_add(
1035
int(timeout.total_seconds() * 1000), self.disable)
1036
self.expires = datetime.datetime.utcnow() + timeout
1037
1038
def need_approval(self):
1039
self.last_approval_request = datetime.datetime.utcnow()
1040
329
1041
def start_checker(self):
330
1042
"""Start a new checker subprocess if one is not running.
1043
331
1044
If a checker already exists, leave it running and do
332
1045
nothing."""
333
1046
# The reason for not killing a running checker is that if we
334
# did that, then if a checker (for some reason) started
335
# running slowly and taking more than 'interval' time, the
336
# client would inevitably timeout, since no checker would get
337
# a chance to run to completion. If we instead leave running
1047
# did that, and if a checker (for some reason) started running
1048
# slowly and taking more than 'interval' time, then the client
1049
# would inevitably timeout, since no checker would get a
1050
# chance to run to completion. If we instead leave running
338
1051
# checkers alone, the checker would have to take more time
339
# than 'timeout' for the client to be declared invalid, which
340
# is as it should be.
341
342
# If a checker exists, make sure it is not a zombie
343
if self.checker is not None:
344
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
345
if pid:
346
logger.warning("Checker was a zombie")
347
gobject.source_remove(self.checker_callback_tag)
348
self.checker_callback(pid, status,
349
self.current_checker_command)
1052
# than 'timeout' for the client to be disabled, which is as it
1053
# should be.
1054
1055
if self.checker is not None and not self.checker.is_alive():
1056
logger.warning("Checker was not alive; joining")
1057
self.checker.join()
1058
self.checker = None
350
1059
# Start a new checker if needed
351
1060
if self.checker is None:
1061
# Escape attributes for the shell
1062
escaped_attrs = {
1063
attr: re.escape(str(getattr(self, attr)))
1064
for attr in self.runtime_expansions}
352
1065
try:
353
# In case checker_command has exactly one % operator
354
command = self.checker_command % self.host
355
except TypeError:
356
# Escape attributes for the shell
357
escaped_attrs = dict((key, re.escape(str(val)))
358
for key, val in
359
vars(self).iteritems())
360
try:
361
command = self.checker_command % escaped_attrs
362
except TypeError, error:
363
logger.error(u'Could not format string "%s":'
364
u' %s', self.checker_command, error)
365
return True # Try again later
1066
command = self.checker_command % escaped_attrs
1067
except TypeError as error:
1068
logger.error('Could not format string "%s"',
1069
self.checker_command,
1070
exc_info=error)
1071
return True # Try again later
366
1072
self.current_checker_command = command
367
try:
368
logger.info(u"Starting checker %r for %s",
369
command, self.name)
370
# We don't need to redirect stdout and stderr, since
371
# in normal mode, that is already done by daemon(),
372
# and in debug mode we don't want to. (Stdin is
373
# always replaced by /dev/null.)
374
self.checker = subprocess.Popen(command,
375
close_fds=True,
376
shell=True, cwd="/")
377
self.checker_callback_tag = (gobject.child_watch_add
378
(self.checker.pid,
379
self.checker_callback,
380
data=command))
381
# The checker may have completed before the gobject
382
# watch was added. Check for this.
383
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
384
if pid:
385
gobject.source_remove(self.checker_callback_tag)
386
self.checker_callback(pid, status, command)
387
except OSError, error:
388
logger.error(u"Failed to start subprocess: %s",
389
error)
390
# Re-run this periodically if run by gobject.timeout_add
1073
logger.info("Starting checker %r for %s", command,
1074
self.name)
1075
# We don't need to redirect stdout and stderr, since
1076
# in normal mode, that is already done by daemon(),
1077
# and in debug mode we don't want to. (Stdin is
1078
# always replaced by /dev/null.)
1079
# The exception is when not debugging but nevertheless
1080
# running in the foreground; use the previously
1081
# created wnull.
1082
popen_args = {"close_fds": True,
1083
"shell": True,
1084
"cwd": "/"}
1085
if (not self.server_settings["debug"]
1086
and self.server_settings["foreground"]):
1087
popen_args.update({"stdout": wnull,
1088
"stderr": wnull})
1089
pipe = multiprocessing.Pipe(duplex=False)
1090
self.checker = multiprocessing.Process(
1091
target=call_pipe,
1092
args=(pipe[1], subprocess.call, command),
1093
kwargs=popen_args)
1094
self.checker.start()
1095
self.checker_callback_tag = GLib.io_add_watch(
1096
pipe[0].fileno(), GLib.IO_IN,
1097
self.checker_callback, pipe[0], command)
1098
# Re-run this periodically if run by GLib.timeout_add
391
1099
return True
392
1100
393
1101
def stop_checker(self):
394
1102
"""Force the checker process, if any, to stop."""
395
1103
if self.checker_callback_tag:
396
gobject.source_remove(self.checker_callback_tag)
1104
GLib.source_remove(self.checker_callback_tag)
397
1105
self.checker_callback_tag = None
398
1106
if getattr(self, "checker", None) is None:
399
1107
return
400
logger.debug(u"Stopping checker for %(name)s", vars(self))
401
try:
402
os.kill(self.checker.pid, signal.SIGTERM)
403
#os.sleep(0.5)
404
#if self.checker.poll() is None:
405
# os.kill(self.checker.pid, signal.SIGKILL)
406
except OSError, error:
407
if error.errno != errno.ESRCH: # No such process
408
raise
1108
logger.debug("Stopping checker for %(name)s", vars(self))
1109
self.checker.terminate()
409
1110
self.checker = None
410
411
def still_valid(self):
412
"""Has the timeout not yet passed for this client?"""
413
if not getattr(self, "enabled", False):
414
return False
415
now = datetime.datetime.utcnow()
416
if self.last_checked_ok is None:
417
return now < (self.created + self.timeout)
418
else:
419
return now < (self.last_checked_ok + self.timeout)
420
421
422
class ClientDBus(Client, dbus.service.Object):
1111
1112
1113
def dbus_service_property(dbus_interface,
1114
signature="v",
1115
access="readwrite",
1116
byte_arrays=False):
1117
"""Decorators for marking methods of a DBusObjectWithProperties to
1118
become properties on the D-Bus.
1119
1120
The decorated method will be called with no arguments by "Get"
1121
and with one argument by "Set".
1122
1123
The parameters, where they are supported, are the same as
1124
dbus.service.method, except there is only "signature", since the
1125
type from Get() and the type sent to Set() is the same.
1126
"""
1127
# Encoding deeply encoded byte arrays is not supported yet by the
1128
# "Set" method, so we fail early here:
1129
if byte_arrays and signature != "ay":
1130
raise ValueError("Byte arrays not supported for non-'ay'"
1131
" signature {!r}".format(signature))
1132
1133
def decorator(func):
1134
func._dbus_is_property = True
1135
func._dbus_interface = dbus_interface
1136
func._dbus_signature = signature
1137
func._dbus_access = access
1138
func._dbus_name = func.__name__
1139
if func._dbus_name.endswith("_dbus_property"):
1140
func._dbus_name = func._dbus_name[:-14]
1141
func._dbus_get_args_options = {'byte_arrays': byte_arrays}
1142
return func
1143
1144
return decorator
1145
1146
1147
def dbus_interface_annotations(dbus_interface):
1148
"""Decorator for marking functions returning interface annotations
1149
1150
Usage:
1151
1152
@dbus_interface_annotations("org.example.Interface")
1153
def _foo(self): # Function name does not matter
1154
return {"org.freedesktop.DBus.Deprecated": "true",
1155
"org.freedesktop.DBus.Property.EmitsChangedSignal":
1156
"false"}
1157
"""
1158
1159
def decorator(func):
1160
func._dbus_is_interface = True
1161
func._dbus_interface = dbus_interface
1162
func._dbus_name = dbus_interface
1163
return func
1164
1165
return decorator
1166
1167
1168
def dbus_annotations(annotations):
1169
"""Decorator to annotate D-Bus methods, signals or properties
1170
Usage:
1171
1172
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
1173
"org.freedesktop.DBus.Property."
1174
"EmitsChangedSignal": "false"})
1175
@dbus_service_property("org.example.Interface", signature="b",
1176
access="r")
1177
def Property_dbus_property(self):
1178
return dbus.Boolean(False)
1179
1180
See also the DBusObjectWithAnnotations class.
1181
"""
1182
1183
def decorator(func):
1184
func._dbus_annotations = annotations
1185
return func
1186
1187
return decorator
1188
1189
1190
class DBusPropertyException(dbus.exceptions.DBusException):
1191
"""A base class for D-Bus property-related exceptions
1192
"""
1193
pass
1194
1195
1196
class DBusPropertyAccessException(DBusPropertyException):
1197
"""A property's access permissions disallows an operation.
1198
"""
1199
pass
1200
1201
1202
class DBusPropertyNotFound(DBusPropertyException):
1203
"""An attempt was made to access a non-existing property.
1204
"""
1205
pass
1206
1207
1208
class DBusObjectWithAnnotations(dbus.service.Object):
1209
"""A D-Bus object with annotations.
1210
1211
Classes inheriting from this can use the dbus_annotations
1212
decorator to add annotations to methods or signals.
1213
"""
1214
1215
@staticmethod
1216
def _is_dbus_thing(thing):
1217
"""Returns a function testing if an attribute is a D-Bus thing
1218
1219
If called like _is_dbus_thing("method") it returns a function
1220
suitable for use as predicate to inspect.getmembers().
1221
"""
1222
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
1223
False)
1224
1225
def _get_all_dbus_things(self, thing):
1226
"""Returns a generator of (name, attribute) pairs
1227
"""
1228
return ((getattr(athing.__get__(self), "_dbus_name", name),
1229
athing.__get__(self))
1230
for cls in self.__class__.__mro__
1231
for name, athing in
1232
inspect.getmembers(cls, self._is_dbus_thing(thing)))
1233
1234
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1235
out_signature="s",
1236
path_keyword='object_path',
1237
connection_keyword='connection')
1238
def Introspect(self, object_path, connection):
1239
"""Overloading of standard D-Bus method.
1240
1241
Inserts annotation tags on methods and signals.
1242
"""
1243
xmlstring = dbus.service.Object.Introspect(self, object_path,
1244
connection)
1245
try:
1246
document = xml.dom.minidom.parseString(xmlstring)
1247
1248
for if_tag in document.getElementsByTagName("interface"):
1249
# Add annotation tags
1250
for typ in ("method", "signal"):
1251
for tag in if_tag.getElementsByTagName(typ):
1252
annots = dict()
1253
for name, prop in (self.
1254
_get_all_dbus_things(typ)):
1255
if (name == tag.getAttribute("name")
1256
and prop._dbus_interface
1257
== if_tag.getAttribute("name")):
1258
annots.update(getattr(
1259
prop, "_dbus_annotations", {}))
1260
for name, value in annots.items():
1261
ann_tag = document.createElement(
1262
"annotation")
1263
ann_tag.setAttribute("name", name)
1264
ann_tag.setAttribute("value", value)
1265
tag.appendChild(ann_tag)
1266
# Add interface annotation tags
1267
for annotation, value in dict(
1268
itertools.chain.from_iterable(
1269
annotations().items()
1270
for name, annotations
1271
in self._get_all_dbus_things("interface")
1272
if name == if_tag.getAttribute("name")
1273
)).items():
1274
ann_tag = document.createElement("annotation")
1275
ann_tag.setAttribute("name", annotation)
1276
ann_tag.setAttribute("value", value)
1277
if_tag.appendChild(ann_tag)
1278
# Fix argument name for the Introspect method itself
1279
if (if_tag.getAttribute("name")
1280
== dbus.INTROSPECTABLE_IFACE):
1281
for cn in if_tag.getElementsByTagName("method"):
1282
if cn.getAttribute("name") == "Introspect":
1283
for arg in cn.getElementsByTagName("arg"):
1284
if (arg.getAttribute("direction")
1285
== "out"):
1286
arg.setAttribute("name",
1287
"xml_data")
1288
xmlstring = document.toxml("utf-8")
1289
document.unlink()
1290
except (AttributeError, xml.dom.DOMException,
1291
xml.parsers.expat.ExpatError) as error:
1292
logger.error("Failed to override Introspection method",
1293
exc_info=error)
1294
return xmlstring
1295
1296
1297
class DBusObjectWithProperties(DBusObjectWithAnnotations):
1298
"""A D-Bus object with properties.
1299
1300
Classes inheriting from this can use the dbus_service_property
1301
decorator to expose methods as D-Bus properties. It exposes the
1302
standard Get(), Set(), and GetAll() methods on the D-Bus.
1303
"""
1304
1305
def _get_dbus_property(self, interface_name, property_name):
1306
"""Returns a bound method if one exists which is a D-Bus
1307
property with the specified name and interface.
1308
"""
1309
for cls in self.__class__.__mro__:
1310
for name, value in inspect.getmembers(
1311
cls, self._is_dbus_thing("property")):
1312
if (value._dbus_name == property_name
1313
and value._dbus_interface == interface_name):
1314
return value.__get__(self)
1315
1316
# No such property
1317
raise DBusPropertyNotFound("{}:{}.{}".format(
1318
self.dbus_object_path, interface_name, property_name))
1319
1320
@classmethod
1321
def _get_all_interface_names(cls):
1322
"""Get a sequence of all interfaces supported by an object"""
1323
return (name for name in set(getattr(getattr(x, attr),
1324
"_dbus_interface", None)
1325
for x in (inspect.getmro(cls))
1326
for attr in dir(x))
1327
if name is not None)
1328
1329
@dbus.service.method(dbus.PROPERTIES_IFACE,
1330
in_signature="ss",
1331
out_signature="v")
1332
def Get(self, interface_name, property_name):
1333
"""Standard D-Bus property Get() method, see D-Bus standard.
1334
"""
1335
prop = self._get_dbus_property(interface_name, property_name)
1336
if prop._dbus_access == "write":
1337
raise DBusPropertyAccessException(property_name)
1338
value = prop()
1339
if not hasattr(value, "variant_level"):
1340
return value
1341
return type(value)(value, variant_level=value.variant_level+1)
1342
1343
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
1344
def Set(self, interface_name, property_name, value):
1345
"""Standard D-Bus property Set() method, see D-Bus standard.
1346
"""
1347
prop = self._get_dbus_property(interface_name, property_name)
1348
if prop._dbus_access == "read":
1349
raise DBusPropertyAccessException(property_name)
1350
if prop._dbus_get_args_options["byte_arrays"]:
1351
# The byte_arrays option is not supported yet on
1352
# signatures other than "ay".
1353
if prop._dbus_signature != "ay":
1354
raise ValueError("Byte arrays not supported for non-"
1355
"'ay' signature {!r}"
1356
.format(prop._dbus_signature))
1357
value = dbus.ByteArray(b''.join(chr(byte)
1358
for byte in value))
1359
prop(value)
1360
1361
@dbus.service.method(dbus.PROPERTIES_IFACE,
1362
in_signature="s",
1363
out_signature="a{sv}")
1364
def GetAll(self, interface_name):
1365
"""Standard D-Bus property GetAll() method, see D-Bus
1366
standard.
1367
1368
Note: Will not include properties with access="write".
1369
"""
1370
properties = {}
1371
for name, prop in self._get_all_dbus_things("property"):
1372
if (interface_name
1373
and interface_name != prop._dbus_interface):
1374
# Interface non-empty but did not match
1375
continue
1376
# Ignore write-only properties
1377
if prop._dbus_access == "write":
1378
continue
1379
value = prop()
1380
if not hasattr(value, "variant_level"):
1381
properties[name] = value
1382
continue
1383
properties[name] = type(value)(
1384
value, variant_level=value.variant_level + 1)
1385
return dbus.Dictionary(properties, signature="sv")
1386
1387
@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
1388
def PropertiesChanged(self, interface_name, changed_properties,
1389
invalidated_properties):
1390
"""Standard D-Bus PropertiesChanged() signal, see D-Bus
1391
standard.
1392
"""
1393
pass
1394
1395
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1396
out_signature="s",
1397
path_keyword='object_path',
1398
connection_keyword='connection')
1399
def Introspect(self, object_path, connection):
1400
"""Overloading of standard D-Bus method.
1401
1402
Inserts property tags and interface annotation tags.
1403
"""
1404
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1405
object_path,
1406
connection)
1407
try:
1408
document = xml.dom.minidom.parseString(xmlstring)
1409
1410
def make_tag(document, name, prop):
1411
e = document.createElement("property")
1412
e.setAttribute("name", name)
1413
e.setAttribute("type", prop._dbus_signature)
1414
e.setAttribute("access", prop._dbus_access)
1415
return e
1416
1417
for if_tag in document.getElementsByTagName("interface"):
1418
# Add property tags
1419
for tag in (make_tag(document, name, prop)
1420
for name, prop
1421
in self._get_all_dbus_things("property")
1422
if prop._dbus_interface
1423
== if_tag.getAttribute("name")):
1424
if_tag.appendChild(tag)
1425
# Add annotation tags for properties
1426
for tag in if_tag.getElementsByTagName("property"):
1427
annots = dict()
1428
for name, prop in self._get_all_dbus_things(
1429
"property"):
1430
if (name == tag.getAttribute("name")
1431
and prop._dbus_interface
1432
== if_tag.getAttribute("name")):
1433
annots.update(getattr(
1434
prop, "_dbus_annotations", {}))
1435
for name, value in annots.items():
1436
ann_tag = document.createElement(
1437
"annotation")
1438
ann_tag.setAttribute("name", name)
1439
ann_tag.setAttribute("value", value)
1440
tag.appendChild(ann_tag)
1441
# Add the names to the return values for the
1442
# "org.freedesktop.DBus.Properties" methods
1443
if (if_tag.getAttribute("name")
1444
== "org.freedesktop.DBus.Properties"):
1445
for cn in if_tag.getElementsByTagName("method"):
1446
if cn.getAttribute("name") == "Get":
1447
for arg in cn.getElementsByTagName("arg"):
1448
if (arg.getAttribute("direction")
1449
== "out"):
1450
arg.setAttribute("name", "value")
1451
elif cn.getAttribute("name") == "GetAll":
1452
for arg in cn.getElementsByTagName("arg"):
1453
if (arg.getAttribute("direction")
1454
== "out"):
1455
arg.setAttribute("name", "props")
1456
xmlstring = document.toxml("utf-8")
1457
document.unlink()
1458
except (AttributeError, xml.dom.DOMException,
1459
xml.parsers.expat.ExpatError) as error:
1460
logger.error("Failed to override Introspection method",
1461
exc_info=error)
1462
return xmlstring
1463
1464
1465
try:
1466
dbus.OBJECT_MANAGER_IFACE
1467
except AttributeError:
1468
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1469
1470
1471
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1472
"""A D-Bus object with an ObjectManager.
1473
1474
Classes inheriting from this exposes the standard
1475
GetManagedObjects call and the InterfacesAdded and
1476
InterfacesRemoved signals on the standard
1477
"org.freedesktop.DBus.ObjectManager" interface.
1478
1479
Note: No signals are sent automatically; they must be sent
1480
manually.
1481
"""
1482
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1483
out_signature="a{oa{sa{sv}}}")
1484
def GetManagedObjects(self):
1485
"""This function must be overridden"""
1486
raise NotImplementedError()
1487
1488
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1489
signature="oa{sa{sv}}")
1490
def InterfacesAdded(self, object_path, interfaces_and_properties):
1491
pass
1492
1493
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1494
def InterfacesRemoved(self, object_path, interfaces):
1495
pass
1496
1497
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1498
out_signature="s",
1499
path_keyword='object_path',
1500
connection_keyword='connection')
1501
def Introspect(self, object_path, connection):
1502
"""Overloading of standard D-Bus method.
1503
1504
Override return argument name of GetManagedObjects to be
1505
"objpath_interfaces_and_properties"
1506
"""
1507
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1508
object_path,
1509
connection)
1510
try:
1511
document = xml.dom.minidom.parseString(xmlstring)
1512
1513
for if_tag in document.getElementsByTagName("interface"):
1514
# Fix argument name for the GetManagedObjects method
1515
if (if_tag.getAttribute("name")
1516
== dbus.OBJECT_MANAGER_IFACE):
1517
for cn in if_tag.getElementsByTagName("method"):
1518
if (cn.getAttribute("name")
1519
== "GetManagedObjects"):
1520
for arg in cn.getElementsByTagName("arg"):
1521
if (arg.getAttribute("direction")
1522
== "out"):
1523
arg.setAttribute(
1524
"name",
1525
"objpath_interfaces"
1526
"_and_properties")
1527
xmlstring = document.toxml("utf-8")
1528
document.unlink()
1529
except (AttributeError, xml.dom.DOMException,
1530
xml.parsers.expat.ExpatError) as error:
1531
logger.error("Failed to override Introspection method",
1532
exc_info=error)
1533
return xmlstring
1534
1535
1536
def datetime_to_dbus(dt, variant_level=0):
1537
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1538
if dt is None:
1539
return dbus.String("", variant_level=variant_level)
1540
return dbus.String(dt.isoformat(), variant_level=variant_level)
1541
1542
1543
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1544
"""A class decorator; applied to a subclass of
1545
dbus.service.Object, it will add alternate D-Bus attributes with
1546
interface names according to the "alt_interface_names" mapping.
1547
Usage:
1548
1549
@alternate_dbus_interfaces({"org.example.Interface":
1550
"net.example.AlternateInterface"})
1551
class SampleDBusObject(dbus.service.Object):
1552
@dbus.service.method("org.example.Interface")
1553
def SampleDBusMethod():
1554
pass
1555
1556
The above "SampleDBusMethod" on "SampleDBusObject" will be
1557
reachable via two interfaces: "org.example.Interface" and
1558
"net.example.AlternateInterface", the latter of which will have
1559
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1560
"true", unless "deprecate" is passed with a False value.
1561
1562
This works for methods and signals, and also for D-Bus properties
1563
(from DBusObjectWithProperties) and interfaces (from the
1564
dbus_interface_annotations decorator).
1565
"""
1566
1567
def wrapper(cls):
1568
for orig_interface_name, alt_interface_name in (
1569
alt_interface_names.items()):
1570
attr = {}
1571
interface_names = set()
1572
# Go though all attributes of the class
1573
for attrname, attribute in inspect.getmembers(cls):
1574
# Ignore non-D-Bus attributes, and D-Bus attributes
1575
# with the wrong interface name
1576
if (not hasattr(attribute, "_dbus_interface")
1577
or not attribute._dbus_interface.startswith(
1578
orig_interface_name)):
1579
continue
1580
# Create an alternate D-Bus interface name based on
1581
# the current name
1582
alt_interface = attribute._dbus_interface.replace(
1583
orig_interface_name, alt_interface_name)
1584
interface_names.add(alt_interface)
1585
# Is this a D-Bus signal?
1586
if getattr(attribute, "_dbus_is_signal", False):
1587
# Extract the original non-method undecorated
1588
# function by black magic
1589
if sys.version_info.major == 2:
1590
nonmethod_func = (dict(
1591
zip(attribute.func_code.co_freevars,
1592
attribute.__closure__))
1593
["func"].cell_contents)
1594
else:
1595
nonmethod_func = (dict(
1596
zip(attribute.__code__.co_freevars,
1597
attribute.__closure__))
1598
["func"].cell_contents)
1599
# Create a new, but exactly alike, function
1600
# object, and decorate it to be a new D-Bus signal
1601
# with the alternate D-Bus interface name
1602
new_function = copy_function(nonmethod_func)
1603
new_function = (dbus.service.signal(
1604
alt_interface,
1605
attribute._dbus_signature)(new_function))
1606
# Copy annotations, if any
1607
try:
1608
new_function._dbus_annotations = dict(
1609
attribute._dbus_annotations)
1610
except AttributeError:
1611
pass
1612
1613
# Define a creator of a function to call both the
1614
# original and alternate functions, so both the
1615
# original and alternate signals gets sent when
1616
# the function is called
1617
def fixscope(func1, func2):
1618
"""This function is a scope container to pass
1619
func1 and func2 to the "call_both" function
1620
outside of its arguments"""
1621
1622
@functools.wraps(func2)
1623
def call_both(*args, **kwargs):
1624
"""This function will emit two D-Bus
1625
signals by calling func1 and func2"""
1626
func1(*args, **kwargs)
1627
func2(*args, **kwargs)
1628
# Make wrapper function look like a D-Bus
1629
# signal
1630
for name, attr in inspect.getmembers(func2):
1631
if name.startswith("_dbus_"):
1632
setattr(call_both, name, attr)
1633
1634
return call_both
1635
# Create the "call_both" function and add it to
1636
# the class
1637
attr[attrname] = fixscope(attribute, new_function)
1638
# Is this a D-Bus method?
1639
elif getattr(attribute, "_dbus_is_method", False):
1640
# Create a new, but exactly alike, function
1641
# object. Decorate it to be a new D-Bus method
1642
# with the alternate D-Bus interface name. Add it
1643
# to the class.
1644
attr[attrname] = (
1645
dbus.service.method(
1646
alt_interface,
1647
attribute._dbus_in_signature,
1648
attribute._dbus_out_signature)
1649
(copy_function(attribute)))
1650
# Copy annotations, if any
1651
try:
1652
attr[attrname]._dbus_annotations = dict(
1653
attribute._dbus_annotations)
1654
except AttributeError:
1655
pass
1656
# Is this a D-Bus property?
1657
elif getattr(attribute, "_dbus_is_property", False):
1658
# Create a new, but exactly alike, function
1659
# object, and decorate it to be a new D-Bus
1660
# property with the alternate D-Bus interface
1661
# name. Add it to the class.
1662
attr[attrname] = (dbus_service_property(
1663
alt_interface, attribute._dbus_signature,
1664
attribute._dbus_access,
1665
attribute._dbus_get_args_options
1666
["byte_arrays"])
1667
(copy_function(attribute)))
1668
# Copy annotations, if any
1669
try:
1670
attr[attrname]._dbus_annotations = dict(
1671
attribute._dbus_annotations)
1672
except AttributeError:
1673
pass
1674
# Is this a D-Bus interface?
1675
elif getattr(attribute, "_dbus_is_interface", False):
1676
# Create a new, but exactly alike, function
1677
# object. Decorate it to be a new D-Bus interface
1678
# with the alternate D-Bus interface name. Add it
1679
# to the class.
1680
attr[attrname] = (
1681
dbus_interface_annotations(alt_interface)
1682
(copy_function(attribute)))
1683
if deprecate:
1684
# Deprecate all alternate interfaces
1685
iname = "_AlternateDBusNames_interface_annotation{}"
1686
for interface_name in interface_names:
1687
1688
@dbus_interface_annotations(interface_name)
1689
def func(self):
1690
return {"org.freedesktop.DBus.Deprecated":
1691
"true"}
1692
# Find an unused name
1693
for aname in (iname.format(i)
1694
for i in itertools.count()):
1695
if aname not in attr:
1696
attr[aname] = func
1697
break
1698
if interface_names:
1699
# Replace the class with a new subclass of it with
1700
# methods, signals, etc. as created above.
1701
if sys.version_info.major == 2:
1702
cls = type(b"{}Alternate".format(cls.__name__),
1703
(cls, ), attr)
1704
else:
1705
cls = type("{}Alternate".format(cls.__name__),
1706
(cls, ), attr)
1707
return cls
1708
1709
return wrapper
1710
1711
1712
@alternate_dbus_interfaces({"se.recompile.Mandos":
1713
"se.bsnet.fukt.Mandos"})
1714
class ClientDBus(Client, DBusObjectWithProperties):
423
1715
"""A Client class using D-Bus
1716
424
1717
Attributes:
425
dbus_object_path: dbus.ObjectPath ; only set if self.use_dbus
1718
dbus_object_path: dbus.ObjectPath
1719
bus: dbus.SystemBus()
426
1720
"""
1721
1722
runtime_expansions = (Client.runtime_expansions
1723
+ ("dbus_object_path", ))
1724
1725
_interface = "se.recompile.Mandos.Client"
1726
427
1727
# dbus.service.Object doesn't use super(), so we can't either.
428
429
def __init__(self, *args, **kwargs):
1728
1729
def __init__(self, bus=None, *args, **kwargs):
1730
self.bus = bus
430
1731
Client.__init__(self, *args, **kwargs)
431
1732
# Only now, when this client is initialized, can it show up on
432
1733
# the D-Bus
433
self.dbus_object_path = (dbus.ObjectPath
434
("/clients/"
435
+ self.name.replace(".", "_")))
436
dbus.service.Object.__init__(self, bus,
437
self.dbus_object_path)
438
def enable(self):
439
oldstate = getattr(self, "enabled", False)
440
r = Client.enable(self)
441
if oldstate != self.enabled:
442
# Emit D-Bus signals
443
self.PropertyChanged(dbus.String(u"enabled"),
444
dbus.Boolean(True, variant_level=1))
445
self.PropertyChanged(dbus.String(u"last_enabled"),
446
(_datetime_to_dbus(self.last_enabled,
447
variant_level=1)))
448
return r
449
450
def disable(self, signal = True):
451
oldstate = getattr(self, "enabled", False)
452
r = Client.disable(self)
453
if signal and oldstate != self.enabled:
454
# Emit D-Bus signal
455
self.PropertyChanged(dbus.String(u"enabled"),
456
dbus.Boolean(False, variant_level=1))
457
return r
458
1734
client_object_name = str(self.name).translate(
1735
{ord("."): ord("_"),
1736
ord("-"): ord("_")})
1737
self.dbus_object_path = dbus.ObjectPath(
1738
"/clients/" + client_object_name)
1739
DBusObjectWithProperties.__init__(self, self.bus,
1740
self.dbus_object_path)
1741
1742
def notifychangeproperty(transform_func, dbus_name,
1743
type_func=lambda x: x,
1744
variant_level=1,
1745
invalidate_only=False,
1746
_interface=_interface):
1747
""" Modify a variable so that it's a property which announces
1748
its changes to DBus.
1749
1750
transform_fun: Function that takes a value and a variant_level
1751
and transforms it to a D-Bus type.
1752
dbus_name: D-Bus name of the variable
1753
type_func: Function that transform the value before sending it
1754
to the D-Bus. Default: no transform
1755
variant_level: D-Bus variant level. Default: 1
1756
"""
1757
attrname = "_{}".format(dbus_name)
1758
1759
def setter(self, value):
1760
if hasattr(self, "dbus_object_path"):
1761
if (not hasattr(self, attrname) or
1762
type_func(getattr(self, attrname, None))
1763
!= type_func(value)):
1764
if invalidate_only:
1765
self.PropertiesChanged(
1766
_interface, dbus.Dictionary(),
1767
dbus.Array((dbus_name, )))
1768
else:
1769
dbus_value = transform_func(
1770
type_func(value),
1771
variant_level=variant_level)
1772
self.PropertyChanged(dbus.String(dbus_name),
1773
dbus_value)
1774
self.PropertiesChanged(
1775
_interface,
1776
dbus.Dictionary({dbus.String(dbus_name):
1777
dbus_value}),
1778
dbus.Array())
1779
setattr(self, attrname, value)
1780
1781
return property(lambda self: getattr(self, attrname), setter)
1782
1783
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1784
approvals_pending = notifychangeproperty(dbus.Boolean,
1785
"ApprovalPending",
1786
type_func=bool)
1787
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1788
last_enabled = notifychangeproperty(datetime_to_dbus,
1789
"LastEnabled")
1790
checker = notifychangeproperty(
1791
dbus.Boolean, "CheckerRunning",
1792
type_func=lambda checker: checker is not None)
1793
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1794
"LastCheckedOK")
1795
last_checker_status = notifychangeproperty(dbus.Int16,
1796
"LastCheckerStatus")
1797
last_approval_request = notifychangeproperty(
1798
datetime_to_dbus, "LastApprovalRequest")
1799
approved_by_default = notifychangeproperty(dbus.Boolean,
1800
"ApprovedByDefault")
1801
approval_delay = notifychangeproperty(
1802
dbus.UInt64, "ApprovalDelay",
1803
type_func=lambda td: td.total_seconds() * 1000)
1804
approval_duration = notifychangeproperty(
1805
dbus.UInt64, "ApprovalDuration",
1806
type_func=lambda td: td.total_seconds() * 1000)
1807
host = notifychangeproperty(dbus.String, "Host")
1808
timeout = notifychangeproperty(
1809
dbus.UInt64, "Timeout",
1810
type_func=lambda td: td.total_seconds() * 1000)
1811
extended_timeout = notifychangeproperty(
1812
dbus.UInt64, "ExtendedTimeout",
1813
type_func=lambda td: td.total_seconds() * 1000)
1814
interval = notifychangeproperty(
1815
dbus.UInt64, "Interval",
1816
type_func=lambda td: td.total_seconds() * 1000)
1817
checker_command = notifychangeproperty(dbus.String, "Checker")
1818
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1819
invalidate_only=True)
1820
1821
del notifychangeproperty
1822
459
1823
def __del__(self, *args, **kwargs):
460
1824
try:
461
1825
self.remove_from_connection()
462
except org.freedesktop.DBus.Python.LookupError:
1826
except LookupError:
463
1827
pass
464
dbus.service.Object.__del__(self, *args, **kwargs)
1828
if hasattr(DBusObjectWithProperties, "__del__"):
1829
DBusObjectWithProperties.__del__(self, *args, **kwargs)
465
1830
Client.__del__(self, *args, **kwargs)
466
467
def checker_callback(self, pid, condition, command,
468
*args, **kwargs):
469
self.checker_callback_tag = None
470
self.checker = None
471
# Emit D-Bus signal
472
self.PropertyChanged(dbus.String(u"checker_running"),
473
dbus.Boolean(False, variant_level=1))
474
if os.WIFEXITED(condition):
475
exitstatus = os.WEXITSTATUS(condition)
1831
1832
def checker_callback(self, source, condition,
1833
connection, command, *args, **kwargs):
1834
ret = Client.checker_callback(self, source, condition,
1835
connection, command, *args,
1836
**kwargs)
1837
exitstatus = self.last_checker_status
1838
if exitstatus >= 0:
476
1839
# Emit D-Bus signal
477
1840
self.CheckerCompleted(dbus.Int16(exitstatus),
478
dbus.Int64(condition),
1841
# This is specific to GNU libC
1842
dbus.Int64(exitstatus << 8),
479
1843
dbus.String(command))
480
1844
else:
481
1845
# Emit D-Bus signal
482
1846
self.CheckerCompleted(dbus.Int16(-1),
483
dbus.Int64(condition),
1847
dbus.Int64(
1848
# This is specific to GNU libC
1849
(exitstatus << 8)
1850
| self.last_checker_signal),
484
1851
dbus.String(command))
485
486
return Client.checker_callback(self, pid, condition, command,
487
*args, **kwargs)
488
489
def checked_ok(self, *args, **kwargs):
490
r = Client.checked_ok(self, *args, **kwargs)
491
# Emit D-Bus signal
492
self.PropertyChanged(
493
dbus.String(u"last_checked_ok"),
494
(_datetime_to_dbus(self.last_checked_ok,
495
variant_level=1)))
496
return r
497
1852
return ret
1853
498
1854
def start_checker(self, *args, **kwargs):
499
old_checker = self.checker
500
if self.checker is not None:
501
old_checker_pid = self.checker.pid
502
else:
503
old_checker_pid = None
1855
old_checker_pid = getattr(self.checker, "pid", None)
504
1856
r = Client.start_checker(self, *args, **kwargs)
505
# Only emit D-Bus signal if new checker process was started
506
if ((self.checker is not None)
507
and not (old_checker is not None
508
and old_checker_pid == self.checker.pid)):
1857
# Only if new checker process was started
1858
if (self.checker is not None
1859
and old_checker_pid != self.checker.pid):
1860
# Emit D-Bus signal
509
1861
self.CheckerStarted(self.current_checker_command)
510
self.PropertyChanged(
511
dbus.String("checker_running"),
512
dbus.Boolean(True, variant_level=1))
513
return r
514
515
def stop_checker(self, *args, **kwargs):
516
old_checker = getattr(self, "checker", None)
517
r = Client.stop_checker(self, *args, **kwargs)
518
if (old_checker is not None
519
and getattr(self, "checker", None) is None):
520
self.PropertyChanged(dbus.String(u"checker_running"),
521
dbus.Boolean(False, variant_level=1))
522
return r
523
524
## D-Bus methods & signals
525
_interface = u"se.bsnet.fukt.Mandos.Client"
526
527
# CheckedOK - method
528
CheckedOK = dbus.service.method(_interface)(checked_ok)
529
CheckedOK.__name__ = "CheckedOK"
530
1862
return r
1863
1864
def _reset_approved(self):
1865
self.approved = None
1866
return False
1867
1868
def approve(self, value=True):
1869
self.approved = value
1870
GLib.timeout_add(int(self.approval_duration.total_seconds()
1871
* 1000), self._reset_approved)
1872
self.send_changedstate()
1873
1874
# D-Bus methods, signals & properties
1875
1876
# Interfaces
1877
1878
# Signals
1879
531
1880
# CheckerCompleted - signal
532
1881
@dbus.service.signal(_interface, signature="nxs")
533
1882
def CheckerCompleted(self, exitcode, waitstatus, command):
534
1883
"D-Bus signal"
535
1884
pass
536
1885
537
1886
# CheckerStarted - signal
538
1887
@dbus.service.signal(_interface, signature="s")
539
1888
def CheckerStarted(self, command):
540
1889
"D-Bus signal"
541
1890
pass
542
543
# GetAllProperties - method
544
@dbus.service.method(_interface, out_signature="a{sv}")
545
def GetAllProperties(self):
546
"D-Bus method"
547
return dbus.Dictionary({
548
dbus.String("name"):
549
dbus.String(self.name, variant_level=1),
550
dbus.String("fingerprint"):
551
dbus.String(self.fingerprint, variant_level=1),
552
dbus.String("host"):
553
dbus.String(self.host, variant_level=1),
554
dbus.String("created"):
555
_datetime_to_dbus(self.created, variant_level=1),
556
dbus.String("last_enabled"):
557
(_datetime_to_dbus(self.last_enabled,
558
variant_level=1)
559
if self.last_enabled is not None
560
else dbus.Boolean(False, variant_level=1)),
561
dbus.String("enabled"):
562
dbus.Boolean(self.enabled, variant_level=1),
563
dbus.String("last_checked_ok"):
564
(_datetime_to_dbus(self.last_checked_ok,
565
variant_level=1)
566
if self.last_checked_ok is not None
567
else dbus.Boolean (False, variant_level=1)),
568
dbus.String("timeout"):
569
dbus.UInt64(self.timeout_milliseconds(),
570
variant_level=1),
571
dbus.String("interval"):
572
dbus.UInt64(self.interval_milliseconds(),
573
variant_level=1),
574
dbus.String("checker"):
575
dbus.String(self.checker_command,
576
variant_level=1),
577
dbus.String("checker_running"):
578
dbus.Boolean(self.checker is not None,
579
variant_level=1),
580
dbus.String("object_path"):
581
dbus.ObjectPath(self.dbus_object_path,
582
variant_level=1)
583
}, signature="sv")
584
585
# IsStillValid - method
586
@dbus.service.method(_interface, out_signature="b")
587
def IsStillValid(self):
588
return self.still_valid()
589
1891
590
1892
# PropertyChanged - signal
1893
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
591
1894
@dbus.service.signal(_interface, signature="sv")
592
1895
def PropertyChanged(self, property, value):
593
1896
"D-Bus signal"
594
1897
pass
595
596
# ReceivedSecret - signal
1898
1899
# GotSecret - signal
597
1900
@dbus.service.signal(_interface)
598
def ReceivedSecret(self):
599
"D-Bus signal"
1901
def GotSecret(self):
1902
"""D-Bus signal
1903
Is sent after a successful transfer of secret from the Mandos
1904
server to mandos-client
1905
"""
600
1906
pass
601
1907
602
1908
# Rejected - signal
603
@dbus.service.signal(_interface)
604
def Rejected(self):
1909
@dbus.service.signal(_interface, signature="s")
1910
def Rejected(self, reason):
605
1911
"D-Bus signal"
606
1912
pass
607
608
# SetChecker - method
609
@dbus.service.method(_interface, in_signature="s")
610
def SetChecker(self, checker):
611
"D-Bus setter method"
612
self.checker_command = checker
613
# Emit D-Bus signal
614
self.PropertyChanged(dbus.String(u"checker"),
615
dbus.String(self.checker_command,
616
variant_level=1))
617
618
# SetHost - method
619
@dbus.service.method(_interface, in_signature="s")
620
def SetHost(self, host):
621
"D-Bus setter method"
622
self.host = host
623
# Emit D-Bus signal
624
self.PropertyChanged(dbus.String(u"host"),
625
dbus.String(self.host, variant_level=1))
626
627
# SetInterval - method
628
@dbus.service.method(_interface, in_signature="t")
629
def SetInterval(self, milliseconds):
630
self.interval = datetime.timedelta(0, 0, 0, milliseconds)
631
# Emit D-Bus signal
632
self.PropertyChanged(dbus.String(u"interval"),
633
(dbus.UInt64(self.interval_milliseconds(),
634
variant_level=1)))
635
636
# SetSecret - method
637
@dbus.service.method(_interface, in_signature="ay",
638
byte_arrays=True)
639
def SetSecret(self, secret):
640
"D-Bus setter method"
641
self.secret = str(secret)
642
643
# SetTimeout - method
644
@dbus.service.method(_interface, in_signature="t")
645
def SetTimeout(self, milliseconds):
646
self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
647
# Emit D-Bus signal
648
self.PropertyChanged(dbus.String(u"timeout"),
649
(dbus.UInt64(self.timeout_milliseconds(),
650
variant_level=1)))
651
1913
1914
# NeedApproval - signal
1915
@dbus.service.signal(_interface, signature="tb")
1916
def NeedApproval(self, timeout, default):
1917
"D-Bus signal"
1918
return self.need_approval()
1919
1920
# Methods
1921
1922
# Approve - method
1923
@dbus.service.method(_interface, in_signature="b")
1924
def Approve(self, value):
1925
self.approve(value)
1926
1927
# CheckedOK - method
1928
@dbus.service.method(_interface)
1929
def CheckedOK(self):
1930
self.checked_ok()
1931
652
1932
# Enable - method
653
Enable = dbus.service.method(_interface)(enable)
654
Enable.__name__ = "Enable"
655
1933
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1934
@dbus.service.method(_interface)
1935
def Enable(self):
1936
"D-Bus method"
1937
self.enable()
1938
656
1939
# StartChecker - method
1940
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
657
1941
@dbus.service.method(_interface)
658
1942
def StartChecker(self):
659
1943
"D-Bus method"
660
1944
self.start_checker()
661
1945
662
1946
# Disable - method
1947
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
663
1948
@dbus.service.method(_interface)
664
1949
def Disable(self):
665
1950
"D-Bus method"
666
1951
self.disable()
667
1952
668
1953
# StopChecker - method
669
StopChecker = dbus.service.method(_interface)(stop_checker)
670
StopChecker.__name__ = "StopChecker"
671
1954
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1955
@dbus.service.method(_interface)
1956
def StopChecker(self):
1957
self.stop_checker()
1958
1959
# Properties
1960
1961
# ApprovalPending - property
1962
@dbus_service_property(_interface, signature="b", access="read")
1963
def ApprovalPending_dbus_property(self):
1964
return dbus.Boolean(bool(self.approvals_pending))
1965
1966
# ApprovedByDefault - property
1967
@dbus_service_property(_interface,
1968
signature="b",
1969
access="readwrite")
1970
def ApprovedByDefault_dbus_property(self, value=None):
1971
if value is None: # get
1972
return dbus.Boolean(self.approved_by_default)
1973
self.approved_by_default = bool(value)
1974
1975
# ApprovalDelay - property
1976
@dbus_service_property(_interface,
1977
signature="t",
1978
access="readwrite")
1979
def ApprovalDelay_dbus_property(self, value=None):
1980
if value is None: # get
1981
return dbus.UInt64(self.approval_delay.total_seconds()
1982
* 1000)
1983
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1984
1985
# ApprovalDuration - property
1986
@dbus_service_property(_interface,
1987
signature="t",
1988
access="readwrite")
1989
def ApprovalDuration_dbus_property(self, value=None):
1990
if value is None: # get
1991
return dbus.UInt64(self.approval_duration.total_seconds()
1992
* 1000)
1993
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1994
1995
# Name - property
1996
@dbus_annotations(
1997
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1998
@dbus_service_property(_interface, signature="s", access="read")
1999
def Name_dbus_property(self):
2000
return dbus.String(self.name)
2001
2002
# Fingerprint - property
2003
@dbus_annotations(
2004
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2005
@dbus_service_property(_interface, signature="s", access="read")
2006
def Fingerprint_dbus_property(self):
2007
return dbus.String(self.fingerprint)
2008
2009
# Host - property
2010
@dbus_service_property(_interface,
2011
signature="s",
2012
access="readwrite")
2013
def Host_dbus_property(self, value=None):
2014
if value is None: # get
2015
return dbus.String(self.host)
2016
self.host = str(value)
2017
2018
# Created - property
2019
@dbus_annotations(
2020
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2021
@dbus_service_property(_interface, signature="s", access="read")
2022
def Created_dbus_property(self):
2023
return datetime_to_dbus(self.created)
2024
2025
# LastEnabled - property
2026
@dbus_service_property(_interface, signature="s", access="read")
2027
def LastEnabled_dbus_property(self):
2028
return datetime_to_dbus(self.last_enabled)
2029
2030
# Enabled - property
2031
@dbus_service_property(_interface,
2032
signature="b",
2033
access="readwrite")
2034
def Enabled_dbus_property(self, value=None):
2035
if value is None: # get
2036
return dbus.Boolean(self.enabled)
2037
if value:
2038
self.enable()
2039
else:
2040
self.disable()
2041
2042
# LastCheckedOK - property
2043
@dbus_service_property(_interface,
2044
signature="s",
2045
access="readwrite")
2046
def LastCheckedOK_dbus_property(self, value=None):
2047
if value is not None:
2048
self.checked_ok()
2049
return
2050
return datetime_to_dbus(self.last_checked_ok)
2051
2052
# LastCheckerStatus - property
2053
@dbus_service_property(_interface, signature="n", access="read")
2054
def LastCheckerStatus_dbus_property(self):
2055
return dbus.Int16(self.last_checker_status)
2056
2057
# Expires - property
2058
@dbus_service_property(_interface, signature="s", access="read")
2059
def Expires_dbus_property(self):
2060
return datetime_to_dbus(self.expires)
2061
2062
# LastApprovalRequest - property
2063
@dbus_service_property(_interface, signature="s", access="read")
2064
def LastApprovalRequest_dbus_property(self):
2065
return datetime_to_dbus(self.last_approval_request)
2066
2067
# Timeout - property
2068
@dbus_service_property(_interface,
2069
signature="t",
2070
access="readwrite")
2071
def Timeout_dbus_property(self, value=None):
2072
if value is None: # get
2073
return dbus.UInt64(self.timeout.total_seconds() * 1000)
2074
old_timeout = self.timeout
2075
self.timeout = datetime.timedelta(0, 0, 0, value)
2076
# Reschedule disabling
2077
if self.enabled:
2078
now = datetime.datetime.utcnow()
2079
self.expires += self.timeout - old_timeout
2080
if self.expires <= now:
2081
# The timeout has passed
2082
self.disable()
2083
else:
2084
if (getattr(self, "disable_initiator_tag", None)
2085
is None):
2086
return
2087
GLib.source_remove(self.disable_initiator_tag)
2088
self.disable_initiator_tag = GLib.timeout_add(
2089
int((self.expires - now).total_seconds() * 1000),
2090
self.disable)
2091
2092
# ExtendedTimeout - property
2093
@dbus_service_property(_interface,
2094
signature="t",
2095
access="readwrite")
2096
def ExtendedTimeout_dbus_property(self, value=None):
2097
if value is None: # get
2098
return dbus.UInt64(self.extended_timeout.total_seconds()
2099
* 1000)
2100
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
2101
2102
# Interval - property
2103
@dbus_service_property(_interface,
2104
signature="t",
2105
access="readwrite")
2106
def Interval_dbus_property(self, value=None):
2107
if value is None: # get
2108
return dbus.UInt64(self.interval.total_seconds() * 1000)
2109
self.interval = datetime.timedelta(0, 0, 0, value)
2110
if getattr(self, "checker_initiator_tag", None) is None:
2111
return
2112
if self.enabled:
2113
# Reschedule checker run
2114
GLib.source_remove(self.checker_initiator_tag)
2115
self.checker_initiator_tag = GLib.timeout_add(
2116
value, self.start_checker)
2117
self.start_checker() # Start one now, too
2118
2119
# Checker - property
2120
@dbus_service_property(_interface,
2121
signature="s",
2122
access="readwrite")
2123
def Checker_dbus_property(self, value=None):
2124
if value is None: # get
2125
return dbus.String(self.checker_command)
2126
self.checker_command = str(value)
2127
2128
# CheckerRunning - property
2129
@dbus_service_property(_interface,
2130
signature="b",
2131
access="readwrite")
2132
def CheckerRunning_dbus_property(self, value=None):
2133
if value is None: # get
2134
return dbus.Boolean(self.checker is not None)
2135
if value:
2136
self.start_checker()
2137
else:
2138
self.stop_checker()
2139
2140
# ObjectPath - property
2141
@dbus_annotations(
2142
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
2143
"org.freedesktop.DBus.Deprecated": "true"})
2144
@dbus_service_property(_interface, signature="o", access="read")
2145
def ObjectPath_dbus_property(self):
2146
return self.dbus_object_path # is already a dbus.ObjectPath
2147
2148
# Secret = property
2149
@dbus_annotations(
2150
{"org.freedesktop.DBus.Property.EmitsChangedSignal":
2151
"invalidates"})
2152
@dbus_service_property(_interface,
2153
signature="ay",
2154
access="write",
2155
byte_arrays=True)
2156
def Secret_dbus_property(self, value):
2157
self.secret = bytes(value)
2158
672
2159
del _interface
673
2160
674
2161
675
def peer_certificate(session):
676
"Return the peer's OpenPGP certificate as a bytestring"
677
# If not an OpenPGP certificate...
678
if (gnutls.library.functions
679
.gnutls_certificate_type_get(session._c_object)
680
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
681
# ...do the normal thing
682
return session.peer_certificate
683
list_size = ctypes.c_uint(1)
684
cert_list = (gnutls.library.functions
685
.gnutls_certificate_get_peers
686
(session._c_object, ctypes.byref(list_size)))
687
if not bool(cert_list) and list_size.value != 0:
688
raise gnutls.errors.GNUTLSError("error getting peer"
689
" certificate")
690
if list_size.value == 0:
691
return None
692
cert = cert_list[0]
693
return ctypes.string_at(cert.data, cert.size)
694
695
696
def fingerprint(openpgp):
697
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
698
# New GnuTLS "datum" with the OpenPGP public key
699
datum = (gnutls.library.types
700
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
701
ctypes.POINTER
702
(ctypes.c_ubyte)),
703
ctypes.c_uint(len(openpgp))))
704
# New empty GnuTLS certificate
705
crt = gnutls.library.types.gnutls_openpgp_crt_t()
706
(gnutls.library.functions
707
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
708
# Import the OpenPGP public key into the certificate
709
(gnutls.library.functions
710
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
711
gnutls.library.constants
712
.GNUTLS_OPENPGP_FMT_RAW))
713
# Verify the self signature in the key
714
crtverify = ctypes.c_uint()
715
(gnutls.library.functions
716
.gnutls_openpgp_crt_verify_self(crt, 0, ctypes.byref(crtverify)))
717
if crtverify.value != 0:
718
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
719
raise gnutls.errors.CertificateSecurityError("Verify failed")
720
# New buffer for the fingerprint
721
buf = ctypes.create_string_buffer(20)
722
buf_len = ctypes.c_size_t()
723
# Get the fingerprint from the certificate into the buffer
724
(gnutls.library.functions
725
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
726
ctypes.byref(buf_len)))
727
# Deinit the certificate
728
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
729
# Convert the buffer to a Python bytestring
730
fpr = ctypes.string_at(buf, buf_len.value)
731
# Convert the bytestring to hexadecimal notation
732
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
733
return hex_fpr
734
735
736
class TCP_handler(SocketServer.BaseRequestHandler, object):
737
"""A TCP request handler class.
738
Instantiated by IPv6_TCPServer for each request to handle it.
2162
class ProxyClient(object):
2163
def __init__(self, child_pipe, fpr, address):
2164
self._pipe = child_pipe
2165
self._pipe.send(('init', fpr, address))
2166
if not self._pipe.recv():
2167
raise KeyError(fpr)
2168
2169
def __getattribute__(self, name):
2170
if name == '_pipe':
2171
return super(ProxyClient, self).__getattribute__(name)
2172
self._pipe.send(('getattr', name))
2173
data = self._pipe.recv()
2174
if data[0] == 'data':
2175
return data[1]
2176
if data[0] == 'function':
2177
2178
def func(*args, **kwargs):
2179
self._pipe.send(('funcall', name, args, kwargs))
2180
return self._pipe.recv()[1]
2181
2182
return func
2183
2184
def __setattr__(self, name, value):
2185
if name == '_pipe':
2186
return super(ProxyClient, self).__setattr__(name, value)
2187
self._pipe.send(('setattr', name, value))
2188
2189
2190
class ClientHandler(socketserver.BaseRequestHandler, object):
2191
"""A class to handle client connections.
2192
2193
Instantiated once for each connection to handle it.
739
2194
Note: This will run in its own forked process."""
740
2195
741
2196
def handle(self):
742
logger.info(u"TCP connection from: %s",
743
unicode(self.client_address))
744
logger.debug(u"IPC Pipe FD: %d", self.server.pipe[1])
745
# Open IPC pipe to parent process
746
with closing(os.fdopen(self.server.pipe[1], "w", 1)) as ipc:
747
session = (gnutls.connection
748
.ClientSession(self.request,
749
gnutls.connection
750
.X509Credentials()))
751
2197
with contextlib.closing(self.server.child_pipe) as child_pipe:
2198
logger.info("TCP connection from: %s",
2199
str(self.client_address))
2200
logger.debug("Pipe FD: %d",
2201
self.server.child_pipe.fileno())
2202
2203
session = gnutls.ClientSession(self.request)
2204
2205
# priority = ':'.join(("NONE", "+VERS-TLS1.1",
2206
# "+AES-256-CBC", "+SHA1",
2207
# "+COMP-NULL", "+CTYPE-OPENPGP",
2208
# "+DHE-DSS"))
2209
# Use a fallback default, since this MUST be set.
2210
priority = self.server.gnutls_priority
2211
if priority is None:
2212
priority = "NORMAL"
2213
gnutls.priority_set_direct(session._c_object,
2214
priority.encode("utf-8"),
2215
None)
2216
2217
# Start communication using the Mandos protocol
2218
# Get protocol number
752
2219
line = self.request.makefile().readline()
753
logger.debug(u"Protocol version: %r", line)
2220
logger.debug("Protocol version: %r", line)
754
2221
try:
755
2222
if int(line.strip().split()[0]) > 1:
756
raise RuntimeError
757
except (ValueError, IndexError, RuntimeError), error:
758
logger.error(u"Unknown protocol version: %s", error)
2223
raise RuntimeError(line)
2224
except (ValueError, IndexError, RuntimeError) as error:
2225
logger.error("Unknown protocol version: %s", error)
759
2226
return
760
761
# Note: gnutls.connection.X509Credentials is really a
762
# generic GnuTLS certificate credentials object so long as
763
# no X.509 keys are added to it. Therefore, we can use it
764
# here despite using OpenPGP certificates.
765
766
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
767
# "+AES-256-CBC", "+SHA1",
768
# "+COMP-NULL", "+CTYPE-OPENPGP",
769
# "+DHE-DSS"))
770
# Use a fallback default, since this MUST be set.
771
priority = self.server.settings.get("priority", "NORMAL")
772
(gnutls.library.functions
773
.gnutls_priority_set_direct(session._c_object,
774
priority, None))
775
2227
2228
# Start GnuTLS connection
776
2229
try:
777
2230
session.handshake()
778
except gnutls.errors.GNUTLSError, error:
779
logger.warning(u"Handshake failed: %s", error)
2231
except gnutls.Error as error:
2232
logger.warning("Handshake failed: %s", error)
780
2233
# Do not run session.bye() here: the session is not
781
2234
# established. Just abandon the request.
782
2235
return
783
logger.debug(u"Handshake succeeded")
2236
logger.debug("Handshake succeeded")
2237
2238
approval_required = False
784
2239
try:
785
fpr = fingerprint(peer_certificate(session))
786
except (TypeError, gnutls.errors.GNUTLSError), error:
787
logger.warning(u"Bad certificate: %s", error)
788
session.bye()
789
return
790
logger.debug(u"Fingerprint: %s", fpr)
791
792
for c in self.server.clients:
793
if c.fingerprint == fpr:
794
client = c
795
break
796
else:
797
logger.warning(u"Client not found for fingerprint: %s",
798
fpr)
799
ipc.write("NOTFOUND %s\n" % fpr)
800
session.bye()
801
return
802
# Have to check if client.still_valid(), since it is
803
# possible that the client timed out while establishing
804
# the GnuTLS session.
805
if not client.still_valid():
806
logger.warning(u"Client %(name)s is invalid",
807
vars(client))
808
ipc.write("INVALID %s\n" % client.name)
809
session.bye()
810
return
811
ipc.write("SENDING %s\n" % client.name)
812
sent_size = 0
813
while sent_size < len(client.secret):
814
sent = session.send(client.secret[sent_size:])
815
logger.debug(u"Sent: %d, remaining: %d",
816
sent, len(client.secret)
817
- (sent_size + sent))
818
sent_size += sent
819
session.bye()
820
821
822
class ForkingMixInWithPipe(SocketServer.ForkingMixIn, object):
823
"""Like SocketServer.ForkingMixIn, but also pass a pipe.
824
Assumes a gobject.MainLoop event loop.
825
"""
2240
try:
2241
fpr = self.fingerprint(
2242
self.peer_certificate(session))
2243
except (TypeError, gnutls.Error) as error:
2244
logger.warning("Bad certificate: %s", error)
2245
return
2246
logger.debug("Fingerprint: %s", fpr)
2247
2248
try:
2249
client = ProxyClient(child_pipe, fpr,
2250
self.client_address)
2251
except KeyError:
2252
return
2253
2254
if client.approval_delay:
2255
delay = client.approval_delay
2256
client.approvals_pending += 1
2257
approval_required = True
2258
2259
while True:
2260
if not client.enabled:
2261
logger.info("Client %s is disabled",
2262
client.name)
2263
if self.server.use_dbus:
2264
# Emit D-Bus signal
2265
client.Rejected("Disabled")
2266
return
2267
2268
if client.approved or not client.approval_delay:
2269
# We are approved or approval is disabled
2270
break
2271
elif client.approved is None:
2272
logger.info("Client %s needs approval",
2273
client.name)
2274
if self.server.use_dbus:
2275
# Emit D-Bus signal
2276
client.NeedApproval(
2277
client.approval_delay.total_seconds()
2278
* 1000, client.approved_by_default)
2279
else:
2280
logger.warning("Client %s was not approved",
2281
client.name)
2282
if self.server.use_dbus:
2283
# Emit D-Bus signal
2284
client.Rejected("Denied")
2285
return
2286
2287
# wait until timeout or approved
2288
time = datetime.datetime.now()
2289
client.changedstate.acquire()
2290
client.changedstate.wait(delay.total_seconds())
2291
client.changedstate.release()
2292
time2 = datetime.datetime.now()
2293
if (time2 - time) >= delay:
2294
if not client.approved_by_default:
2295
logger.warning("Client %s timed out while"
2296
" waiting for approval",
2297
client.name)
2298
if self.server.use_dbus:
2299
# Emit D-Bus signal
2300
client.Rejected("Approval timed out")
2301
return
2302
else:
2303
break
2304
else:
2305
delay -= time2 - time
2306
2307
try:
2308
session.send(client.secret)
2309
except gnutls.Error as error:
2310
logger.warning("gnutls send failed",
2311
exc_info=error)
2312
return
2313
2314
logger.info("Sending secret to %s", client.name)
2315
# bump the timeout using extended_timeout
2316
client.bump_timeout(client.extended_timeout)
2317
if self.server.use_dbus:
2318
# Emit D-Bus signal
2319
client.GotSecret()
2320
2321
finally:
2322
if approval_required:
2323
client.approvals_pending -= 1
2324
try:
2325
session.bye()
2326
except gnutls.Error as error:
2327
logger.warning("GnuTLS bye failed",
2328
exc_info=error)
2329
2330
@staticmethod
2331
def peer_certificate(session):
2332
"Return the peer's OpenPGP certificate as a bytestring"
2333
# If not an OpenPGP certificate...
2334
if (gnutls.certificate_type_get(session._c_object)
2335
!= gnutls.CRT_OPENPGP):
2336
# ...return invalid data
2337
return b""
2338
list_size = ctypes.c_uint(1)
2339
cert_list = (gnutls.certificate_get_peers
2340
(session._c_object, ctypes.byref(list_size)))
2341
if not bool(cert_list) and list_size.value != 0:
2342
raise gnutls.Error("error getting peer certificate")
2343
if list_size.value == 0:
2344
return None
2345
cert = cert_list[0]
2346
return ctypes.string_at(cert.data, cert.size)
2347
2348
@staticmethod
2349
def fingerprint(openpgp):
2350
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
2351
# New GnuTLS "datum" with the OpenPGP public key
2352
datum = gnutls.datum_t(
2353
ctypes.cast(ctypes.c_char_p(openpgp),
2354
ctypes.POINTER(ctypes.c_ubyte)),
2355
ctypes.c_uint(len(openpgp)))
2356
# New empty GnuTLS certificate
2357
crt = gnutls.openpgp_crt_t()
2358
gnutls.openpgp_crt_init(ctypes.byref(crt))
2359
# Import the OpenPGP public key into the certificate
2360
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2361
gnutls.OPENPGP_FMT_RAW)
2362
# Verify the self signature in the key
2363
crtverify = ctypes.c_uint()
2364
gnutls.openpgp_crt_verify_self(crt, 0,
2365
ctypes.byref(crtverify))
2366
if crtverify.value != 0:
2367
gnutls.openpgp_crt_deinit(crt)
2368
raise gnutls.CertificateSecurityError("Verify failed")
2369
# New buffer for the fingerprint
2370
buf = ctypes.create_string_buffer(20)
2371
buf_len = ctypes.c_size_t()
2372
# Get the fingerprint from the certificate into the buffer
2373
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2374
ctypes.byref(buf_len))
2375
# Deinit the certificate
2376
gnutls.openpgp_crt_deinit(crt)
2377
# Convert the buffer to a Python bytestring
2378
fpr = ctypes.string_at(buf, buf_len.value)
2379
# Convert the bytestring to hexadecimal notation
2380
hex_fpr = binascii.hexlify(fpr).upper()
2381
return hex_fpr
2382
2383
2384
class MultiprocessingMixIn(object):
2385
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2386
2387
def sub_process_main(self, request, address):
2388
try:
2389
self.finish_request(request, address)
2390
except Exception:
2391
self.handle_error(request, address)
2392
self.close_request(request)
2393
2394
def process_request(self, request, address):
2395
"""Start a new process to process the request."""
2396
proc = multiprocessing.Process(target=self.sub_process_main,
2397
args=(request, address))
2398
proc.start()
2399
return proc
2400
2401
2402
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
2403
""" adds a pipe to the MixIn """
2404
826
2405
def process_request(self, request, client_address):
827
"""This overrides and wraps the original process_request().
828
This function creates a new pipe in self.pipe
2406
"""Overrides and wraps the original process_request().
2407
2408
This function creates a new pipe in self.pipe
829
2409
"""
830
self.pipe = os.pipe()
831
super(ForkingMixInWithPipe,
832
self).process_request(request, client_address)
833
os.close(self.pipe[1]) # close write end
834
# Call "handle_ipc" for both data and EOF events
835
gobject.io_add_watch(self.pipe[0],
836
gobject.IO_IN | gobject.IO_HUP,
837
self.handle_ipc)
838
def handle_ipc(source, condition):
2410
parent_pipe, self.child_pipe = multiprocessing.Pipe()
2411
2412
proc = MultiprocessingMixIn.process_request(self, request,
2413
client_address)
2414
self.child_pipe.close()
2415
self.add_pipe(parent_pipe, proc)
2416
2417
def add_pipe(self, parent_pipe, proc):
839
2418
"""Dummy function; override as necessary"""
840
os.close(source)
841
return False
842
843
844
class IPv6_TCPServer(ForkingMixInWithPipe,
845
SocketServer.TCPServer, object):
2419
raise NotImplementedError()
2420
2421
2422
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
2423
socketserver.TCPServer, object):
846
2424
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
2425
847
2426
Attributes:
848
settings: Server settings
849
clients: Set() of Client objects
850
2427
enabled: Boolean; whether this server is activated yet
2428
interface: None or a network interface name (string)
2429
use_ipv6: Boolean; to use IPv6 or not
851
2430
"""
852
address_family = socket.AF_INET6
853
def __init__(self, *args, **kwargs):
854
if "settings" in kwargs:
855
self.settings = kwargs["settings"]
856
del kwargs["settings"]
857
if "clients" in kwargs:
858
self.clients = kwargs["clients"]
859
del kwargs["clients"]
860
if "use_ipv6" in kwargs:
861
if not kwargs["use_ipv6"]:
862
self.address_family = socket.AF_INET
863
del kwargs["use_ipv6"]
864
self.enabled = False
865
super(IPv6_TCPServer, self).__init__(*args, **kwargs)
2431
2432
def __init__(self, server_address, RequestHandlerClass,
2433
interface=None,
2434
use_ipv6=True,
2435
socketfd=None):
2436
"""If socketfd is set, use that file descriptor instead of
2437
creating a new one with socket.socket().
2438
"""
2439
self.interface = interface
2440
if use_ipv6:
2441
self.address_family = socket.AF_INET6
2442
if socketfd is not None:
2443
# Save the file descriptor
2444
self.socketfd = socketfd
2445
# Save the original socket.socket() function
2446
self.socket_socket = socket.socket
2447
2448
# To implement --socket, we monkey patch socket.socket.
2449
#
2450
# (When socketserver.TCPServer is a new-style class, we
2451
# could make self.socket into a property instead of monkey
2452
# patching socket.socket.)
2453
#
2454
# Create a one-time-only replacement for socket.socket()
2455
@functools.wraps(socket.socket)
2456
def socket_wrapper(*args, **kwargs):
2457
# Restore original function so subsequent calls are
2458
# not affected.
2459
socket.socket = self.socket_socket
2460
del self.socket_socket
2461
# This time only, return a new socket object from the
2462
# saved file descriptor.
2463
return socket.fromfd(self.socketfd, *args, **kwargs)
2464
# Replace socket.socket() function with wrapper
2465
socket.socket = socket_wrapper
2466
# The socketserver.TCPServer.__init__ will call
2467
# socket.socket(), which might be our replacement,
2468
# socket_wrapper(), if socketfd was set.
2469
socketserver.TCPServer.__init__(self, server_address,
2470
RequestHandlerClass)
2471
866
2472
def server_bind(self):
867
2473
"""This overrides the normal server_bind() function
868
2474
to bind to an interface if one was specified, and also NOT to
869
2475
bind to an address or port if they were not specified."""
870
if self.settings["interface"]:
871
# 25 is from /usr/include/asm-i486/socket.h
872
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
2476
global SO_BINDTODEVICE
2477
if self.interface is not None:
2478
if SO_BINDTODEVICE is None:
2479
# Fall back to a hard-coded value which seems to be
2480
# common enough.
2481
logger.warning("SO_BINDTODEVICE not found, trying 25")
2482
SO_BINDTODEVICE = 25
873
2483
try:
874
self.socket.setsockopt(socket.SOL_SOCKET,
875
SO_BINDTODEVICE,
876
self.settings["interface"])
877
except socket.error, error:
878
if error[0] == errno.EPERM:
879
logger.error(u"No permission to"
880
u" bind to interface %s",
881
self.settings["interface"])
2484
self.socket.setsockopt(
2485
socket.SOL_SOCKET, SO_BINDTODEVICE,
2486
(self.interface + "\0").encode("utf-8"))
2487
except socket.error as error:
2488
if error.errno == errno.EPERM:
2489
logger.error("No permission to bind to"
2490
" interface %s", self.interface)
2491
elif error.errno == errno.ENOPROTOOPT:
2492
logger.error("SO_BINDTODEVICE not available;"
2493
" cannot bind to interface %s",
2494
self.interface)
2495
elif error.errno == errno.ENODEV:
2496
logger.error("Interface %s does not exist,"
2497
" cannot bind", self.interface)
882
2498
else:
883
2499
raise
884
2500
# Only bind(2) the socket if we really need to.
885
2501
if self.server_address[0] or self.server_address[1]:
886
2502
if not self.server_address[0]:
887
2503
if self.address_family == socket.AF_INET6:
888
any_address = "::" # in6addr_any
2504
any_address = "::" # in6addr_any
889
2505
else:
890
any_address = socket.INADDR_ANY
2506
any_address = "0.0.0.0" # INADDR_ANY
891
2507
self.server_address = (any_address,
892
2508
self.server_address[1])
893
2509
elif not self.server_address[1]:
894
self.server_address = (self.server_address[0],
895
0)
896
# if self.settings["interface"]:
2510
self.server_address = (self.server_address[0], 0)
2511
# if self.interface:
897
2512
# self.server_address = (self.server_address[0],
898
2513
# 0, # port
899
2514
# 0, # flowinfo
900
2515
# if_nametoindex
901
# (self.settings
902
# ["interface"]))
903
return super(IPv6_TCPServer, self).server_bind()
2516
# (self.interface))
2517
return socketserver.TCPServer.server_bind(self)
2518
2519
2520
class MandosServer(IPv6_TCPServer):
2521
"""Mandos server.
2522
2523
Attributes:
2524
clients: set of Client objects
2525
gnutls_priority GnuTLS priority string
2526
use_dbus: Boolean; to emit D-Bus signals or not
2527
2528
Assumes a GLib.MainLoop event loop.
2529
"""
2530
2531
def __init__(self, server_address, RequestHandlerClass,
2532
interface=None,
2533
use_ipv6=True,
2534
clients=None,
2535
gnutls_priority=None,
2536
use_dbus=True,
2537
socketfd=None):
2538
self.enabled = False
2539
self.clients = clients
2540
if self.clients is None:
2541
self.clients = {}
2542
self.use_dbus = use_dbus
2543
self.gnutls_priority = gnutls_priority
2544
IPv6_TCPServer.__init__(self, server_address,
2545
RequestHandlerClass,
2546
interface=interface,
2547
use_ipv6=use_ipv6,
2548
socketfd=socketfd)
2549
904
2550
def server_activate(self):
905
2551
if self.enabled:
906
return super(IPv6_TCPServer, self).server_activate()
2552
return socketserver.TCPServer.server_activate(self)
2553
907
2554
def enable(self):
908
2555
self.enabled = True
909
def handle_ipc(self, source, condition, file_objects={}):
910
condition_names = {
911
gobject.IO_IN: "IN", # There is data to read.
912
gobject.IO_OUT: "OUT", # Data can be written (without
913
# blocking).
914
gobject.IO_PRI: "PRI", # There is urgent data to read.
915
gobject.IO_ERR: "ERR", # Error condition.
916
gobject.IO_HUP: "HUP" # Hung up (the connection has been
917
# broken, usually for pipes and
918
# sockets).
919
}
920
conditions_string = ' | '.join(name
921
for cond, name in
922
condition_names.iteritems()
923
if cond & condition)
924
logger.debug("Handling IPC: FD = %d, condition = %s", source,
925
conditions_string)
926
927
# Turn the pipe file descriptor into a Python file object
928
if source not in file_objects:
929
file_objects[source] = os.fdopen(source, "r", 1)
930
931
# Read a line from the file object
932
cmdline = file_objects[source].readline()
933
if not cmdline: # Empty line means end of file
934
# close the IPC pipe
935
file_objects[source].close()
936
del file_objects[source]
937
938
# Stop calling this function
2556
2557
def add_pipe(self, parent_pipe, proc):
2558
# Call "handle_ipc" for both data and EOF events
2559
GLib.io_add_watch(
2560
parent_pipe.fileno(),
2561
GLib.IO_IN | GLib.IO_HUP,
2562
functools.partial(self.handle_ipc,
2563
parent_pipe=parent_pipe,
2564
proc=proc))
2565
2566
def handle_ipc(self, source, condition,
2567
parent_pipe=None,
2568
proc=None,
2569
client_object=None):
2570
# error, or the other end of multiprocessing.Pipe has closed
2571
if condition & (GLib.IO_ERR | GLib.IO_HUP):
2572
# Wait for other process to exit
2573
proc.join()
939
2574
return False
940
941
logger.debug("IPC command: %r\n" % cmdline)
942
943
# Parse and act on command
944
cmd, args = cmdline.split(None, 1)
945
if cmd == "NOTFOUND":
946
if self.settings["use_dbus"]:
947
# Emit D-Bus signal
948
mandos_dbus_service.ClientNotFound(args)
949
elif cmd == "INVALID":
950
if self.settings["use_dbus"]:
951
for client in self.clients:
952
if client.name == args:
953
# Emit D-Bus signal
954
client.Rejected()
955
break
956
elif cmd == "SENDING":
957
for client in self.clients:
958
if client.name == args:
959
client.checked_ok()
960
if self.settings["use_dbus"]:
961
# Emit D-Bus signal
962
client.ReceivedSecret()
2575
2576
# Read a request from the child
2577
request = parent_pipe.recv()
2578
command = request[0]
2579
2580
if command == 'init':
2581
fpr = request[1].decode("ascii")
2582
address = request[2]
2583
2584
for c in self.clients.values():
2585
if c.fingerprint == fpr:
2586
client = c
963
2587
break
2588
else:
2589
logger.info("Client not found for fingerprint: %s, ad"
2590
"dress: %s", fpr, address)
2591
if self.use_dbus:
2592
# Emit D-Bus signal
2593
mandos_dbus_service.ClientNotFound(fpr,
2594
address[0])
2595
parent_pipe.send(False)
2596
return False
2597
2598
GLib.io_add_watch(
2599
parent_pipe.fileno(),
2600
GLib.IO_IN | GLib.IO_HUP,
2601
functools.partial(self.handle_ipc,
2602
parent_pipe=parent_pipe,
2603
proc=proc,
2604
client_object=client))
2605
parent_pipe.send(True)
2606
# remove the old hook in favor of the new above hook on
2607
# same fileno
2608
return False
2609
if command == 'funcall':
2610
funcname = request[1]
2611
args = request[2]
2612
kwargs = request[3]
2613
2614
parent_pipe.send(('data', getattr(client_object,
2615
funcname)(*args,
2616
**kwargs)))
2617
2618
if command == 'getattr':
2619
attrname = request[1]
2620
if isinstance(client_object.__getattribute__(attrname),
2621
collections.Callable):
2622
parent_pipe.send(('function', ))
2623
else:
2624
parent_pipe.send((
2625
'data', client_object.__getattribute__(attrname)))
2626
2627
if command == 'setattr':
2628
attrname = request[1]
2629
value = request[2]
2630
setattr(client_object, attrname, value)
2631
2632
return True
2633
2634
2635
def rfc3339_duration_to_delta(duration):
2636
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2637
2638
>>> rfc3339_duration_to_delta("P7D")
2639
datetime.timedelta(7)
2640
>>> rfc3339_duration_to_delta("PT60S")
2641
datetime.timedelta(0, 60)
2642
>>> rfc3339_duration_to_delta("PT60M")
2643
datetime.timedelta(0, 3600)
2644
>>> rfc3339_duration_to_delta("PT24H")
2645
datetime.timedelta(1)
2646
>>> rfc3339_duration_to_delta("P1W")
2647
datetime.timedelta(7)
2648
>>> rfc3339_duration_to_delta("PT5M30S")
2649
datetime.timedelta(0, 330)
2650
>>> rfc3339_duration_to_delta("P1DT3M20S")
2651
datetime.timedelta(1, 200)
2652
"""
2653
2654
# Parsing an RFC 3339 duration with regular expressions is not
2655
# possible - there would have to be multiple places for the same
2656
# values, like seconds. The current code, while more esoteric, is
2657
# cleaner without depending on a parsing library. If Python had a
2658
# built-in library for parsing we would use it, but we'd like to
2659
# avoid excessive use of external libraries.
2660
2661
# New type for defining tokens, syntax, and semantics all-in-one
2662
Token = collections.namedtuple("Token", (
2663
"regexp", # To match token; if "value" is not None, must have
2664
# a "group" containing digits
2665
"value", # datetime.timedelta or None
2666
"followers")) # Tokens valid after this token
2667
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2668
# the "duration" ABNF definition in RFC 3339, Appendix A.
2669
token_end = Token(re.compile(r"$"), None, frozenset())
2670
token_second = Token(re.compile(r"(\d+)S"),
2671
datetime.timedelta(seconds=1),
2672
frozenset((token_end, )))
2673
token_minute = Token(re.compile(r"(\d+)M"),
2674
datetime.timedelta(minutes=1),
2675
frozenset((token_second, token_end)))
2676
token_hour = Token(re.compile(r"(\d+)H"),
2677
datetime.timedelta(hours=1),
2678
frozenset((token_minute, token_end)))
2679
token_time = Token(re.compile(r"T"),
2680
None,
2681
frozenset((token_hour, token_minute,
2682
token_second)))
2683
token_day = Token(re.compile(r"(\d+)D"),
2684
datetime.timedelta(days=1),
2685
frozenset((token_time, token_end)))
2686
token_month = Token(re.compile(r"(\d+)M"),
2687
datetime.timedelta(weeks=4),
2688
frozenset((token_day, token_end)))
2689
token_year = Token(re.compile(r"(\d+)Y"),
2690
datetime.timedelta(weeks=52),
2691
frozenset((token_month, token_end)))
2692
token_week = Token(re.compile(r"(\d+)W"),
2693
datetime.timedelta(weeks=1),
2694
frozenset((token_end, )))
2695
token_duration = Token(re.compile(r"P"), None,
2696
frozenset((token_year, token_month,
2697
token_day, token_time,
2698
token_week)))
2699
# Define starting values:
2700
# Value so far
2701
value = datetime.timedelta()
2702
found_token = None
2703
# Following valid tokens
2704
followers = frozenset((token_duration, ))
2705
# String left to parse
2706
s = duration
2707
# Loop until end token is found
2708
while found_token is not token_end:
2709
# Search for any currently valid tokens
2710
for token in followers:
2711
match = token.regexp.match(s)
2712
if match is not None:
2713
# Token found
2714
if token.value is not None:
2715
# Value found, parse digits
2716
factor = int(match.group(1), 10)
2717
# Add to value so far
2718
value += factor * token.value
2719
# Strip token from string
2720
s = token.regexp.sub("", s, 1)
2721
# Go to found token
2722
found_token = token
2723
# Set valid next tokens
2724
followers = found_token.followers
2725
break
964
2726
else:
965
logger.error("Unknown IPC command: %r", cmdline)
966
967
# Keep calling this function
968
return True
2727
# No currently valid tokens were found
2728
raise ValueError("Invalid RFC 3339 duration: {!r}"
2729
.format(duration))
2730
# End token found
2731
return value
969
2732
970
2733
971
2734
def string_to_delta(interval):
972
2735
"""Parse a string and return a datetime.timedelta
973
2736
974
2737
>>> string_to_delta('7d')
975
2738
datetime.timedelta(7)
976
2739
>>> string_to_delta('60s')
979
2742
datetime.timedelta(0, 3600)
980
2743
>>> string_to_delta('24h')
981
2744
datetime.timedelta(1)
982
>>> string_to_delta(u'1w')
2745
>>> string_to_delta('1w')
983
2746
datetime.timedelta(7)
984
2747
>>> string_to_delta('5m 30s')
985
2748
datetime.timedelta(0, 330)
986
2749
"""
2750
2751
try:
2752
return rfc3339_duration_to_delta(interval)
2753
except ValueError:
2754
pass
2755
987
2756
timevalue = datetime.timedelta(0)
988
2757
for s in interval.split():
989
2758
try:
990
suffix = unicode(s[-1])
2759
suffix = s[-1]
991
2760
value = int(s[:-1])
992
if suffix == u"d":
2761
if suffix == "d":
993
2762
delta = datetime.timedelta(value)
994
elif suffix == u"s":
2763
elif suffix == "s":
995
2764
delta = datetime.timedelta(0, value)
996
elif suffix == u"m":
2765
elif suffix == "m":
997
2766
delta = datetime.timedelta(0, 0, 0, 0, value)
998
elif suffix == u"h":
2767
elif suffix == "h":
999
2768
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
1000
elif suffix == u"w":
2769
elif suffix == "w":
1001
2770
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1002
2771
else:
1003
raise ValueError
1004
except (ValueError, IndexError):
1005
raise ValueError
2772
raise ValueError("Unknown suffix {!r}".format(suffix))
2773
except IndexError as e:
2774
raise ValueError(*(e.args))
1006
2775
timevalue += delta
1007
2776
return timevalue
1008
2777
1009
2778
1010
def server_state_changed(state):
1011
"""Derived from the Avahi example code"""
1012
if state == avahi.SERVER_COLLISION:
1013
logger.error(u"Zeroconf server name collision")
1014
service.remove()
1015
elif state == avahi.SERVER_RUNNING:
1016
service.add()
1017
1018
1019
def entry_group_state_changed(state, error):
1020
"""Derived from the Avahi example code"""
1021
logger.debug(u"Avahi state change: %i", state)
1022
1023
if state == avahi.ENTRY_GROUP_ESTABLISHED:
1024
logger.debug(u"Zeroconf service established.")
1025
elif state == avahi.ENTRY_GROUP_COLLISION:
1026
logger.warning(u"Zeroconf service name collision.")
1027
service.rename()
1028
elif state == avahi.ENTRY_GROUP_FAILURE:
1029
logger.critical(u"Avahi: Error in group state changed %s",
1030
unicode(error))
1031
raise AvahiGroupError(u"State changed: %s" % unicode(error))
1032
1033
def if_nametoindex(interface):
1034
"""Call the C function if_nametoindex(), or equivalent"""
1035
global if_nametoindex
1036
try:
1037
if_nametoindex = (ctypes.cdll.LoadLibrary
1038
(ctypes.util.find_library("c"))
1039
.if_nametoindex)
1040
except (OSError, AttributeError):
1041
if "struct" not in sys.modules:
1042
import struct
1043
if "fcntl" not in sys.modules:
1044
import fcntl
1045
def if_nametoindex(interface):
1046
"Get an interface index the hard way, i.e. using fcntl()"
1047
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1048
with closing(socket.socket()) as s:
1049
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1050
struct.pack("16s16x", interface))
1051
interface_index = struct.unpack("I", ifreq[16:20])[0]
1052
return interface_index
1053
return if_nametoindex(interface)
1054
1055
1056
def daemon(nochdir = False, noclose = False):
2779
def daemon(nochdir=False, noclose=False):
1057
2780
"""See daemon(3). Standard BSD Unix function.
2781
1058
2782
This should really exist as os.daemon, but it doesn't (yet)."""
1059
2783
if os.fork():
1060
2784
sys.exit()
1065
2789
sys.exit()
1066
2790
if not noclose:
1067
2791
# Close all standard open file descriptors
1068
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2792
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1069
2793
if not stat.S_ISCHR(os.fstat(null).st_mode):
1070
2794
raise OSError(errno.ENODEV,
1071
"/dev/null not a character device")
2795
"{} not a character device"
2796
.format(os.devnull))
1072
2797
os.dup2(null, sys.stdin.fileno())
1073
2798
os.dup2(null, sys.stdout.fileno())
1074
2799
os.dup2(null, sys.stderr.fileno())
1077
2802
1078
2803
1079
2804
def main():
1080
1081
######################################################################
2805
2806
##################################################################
1082
2807
# Parsing of options, both command line and config file
1083
1084
parser = optparse.OptionParser(version = "%%prog %s" % version)
1085
parser.add_option("-i", "--interface", type="string",
1086
metavar="IF", help="Bind to interface IF")
1087
parser.add_option("-a", "--address", type="string",
1088
help="Address to listen for requests on")
1089
parser.add_option("-p", "--port", type="int",
1090
help="Port number to receive requests on")
1091
parser.add_option("--check", action="store_true",
1092
help="Run self-test")
1093
parser.add_option("--debug", action="store_true",
1094
help="Debug mode; run in foreground and log to"
1095
" terminal")
1096
parser.add_option("--priority", type="string", help="GnuTLS"
1097
" priority string (see GnuTLS documentation)")
1098
parser.add_option("--servicename", type="string", metavar="NAME",
1099
help="Zeroconf service name")
1100
parser.add_option("--configdir", type="string",
1101
default="/etc/mandos", metavar="DIR",
1102
help="Directory to search for configuration"
1103
" files")
1104
parser.add_option("--no-dbus", action="store_false",
1105
dest="use_dbus",
1106
help="Do not provide D-Bus system bus"
1107
" interface")
1108
parser.add_option("--no-ipv6", action="store_false",
1109
dest="use_ipv6", help="Do not use IPv6")
1110
options = parser.parse_args()[0]
1111
2808
2809
parser = argparse.ArgumentParser()
2810
parser.add_argument("-v", "--version", action="version",
2811
version="%(prog)s {}".format(version),
2812
help="show version number and exit")
2813
parser.add_argument("-i", "--interface", metavar="IF",
2814
help="Bind to interface IF")
2815
parser.add_argument("-a", "--address",
2816
help="Address to listen for requests on")
2817
parser.add_argument("-p", "--port", type=int,
2818
help="Port number to receive requests on")
2819
parser.add_argument("--check", action="store_true",
2820
help="Run self-test")
2821
parser.add_argument("--debug", action="store_true",
2822
help="Debug mode; run in foreground and log"
2823
" to terminal", default=None)
2824
parser.add_argument("--debuglevel", metavar="LEVEL",
2825
help="Debug level for stdout output")
2826
parser.add_argument("--priority", help="GnuTLS"
2827
" priority string (see GnuTLS documentation)")
2828
parser.add_argument("--servicename",
2829
metavar="NAME", help="Zeroconf service name")
2830
parser.add_argument("--configdir",
2831
default="/etc/mandos", metavar="DIR",
2832
help="Directory to search for configuration"
2833
" files")
2834
parser.add_argument("--no-dbus", action="store_false",
2835
dest="use_dbus", help="Do not provide D-Bus"
2836
" system bus interface", default=None)
2837
parser.add_argument("--no-ipv6", action="store_false",
2838
dest="use_ipv6", help="Do not use IPv6",
2839
default=None)
2840
parser.add_argument("--no-restore", action="store_false",
2841
dest="restore", help="Do not restore stored"
2842
" state", default=None)
2843
parser.add_argument("--socket", type=int,
2844
help="Specify a file descriptor to a network"
2845
" socket to use instead of creating one")
2846
parser.add_argument("--statedir", metavar="DIR",
2847
help="Directory to save/restore state in")
2848
parser.add_argument("--foreground", action="store_true",
2849
help="Run in foreground", default=None)
2850
parser.add_argument("--no-zeroconf", action="store_false",
2851
dest="zeroconf", help="Do not use Zeroconf",
2852
default=None)
2853
2854
options = parser.parse_args()
2855
1112
2856
if options.check:
1113
2857
import doctest
1114
doctest.testmod()
1115
sys.exit()
1116
2858
fail_count, test_count = doctest.testmod()
2859
sys.exit(os.EX_OK if fail_count == 0 else 1)
2860
1117
2861
# Default values for config file for server-global settings
1118
server_defaults = { "interface": "",
1119
"address": "",
1120
"port": "",
1121
"debug": "False",
1122
"priority":
1123
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1124
"servicename": "Mandos",
1125
"use_dbus": "True",
1126
"use_ipv6": "True",
1127
}
1128
2862
server_defaults = {"interface": "",
2863
"address": "",
2864
"port": "",
2865
"debug": "False",
2866
"priority":
2867
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2868
":+SIGN-DSA-SHA256",
2869
"servicename": "Mandos",
2870
"use_dbus": "True",
2871
"use_ipv6": "True",
2872
"debuglevel": "",
2873
"restore": "True",
2874
"socket": "",
2875
"statedir": "/var/lib/mandos",
2876
"foreground": "False",
2877
"zeroconf": "True",
2878
}
2879
1129
2880
# Parse config file for server-global settings
1130
server_config = ConfigParser.SafeConfigParser(server_defaults)
2881
server_config = configparser.SafeConfigParser(server_defaults)
1131
2882
del server_defaults
1132
2883
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1133
2884
# Convert the SafeConfigParser object to a dict
1134
2885
server_settings = server_config.defaults()
1135
2886
# Use the appropriate methods on the non-string config options
1136
server_settings["debug"] = server_config.getboolean("DEFAULT",
1137
"debug")
1138
server_settings["use_dbus"] = server_config.getboolean("DEFAULT",
1139
"use_dbus")
1140
server_settings["use_ipv6"] = server_config.getboolean("DEFAULT",
1141
"use_ipv6")
2887
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2888
"foreground", "zeroconf"):
2889
server_settings[option] = server_config.getboolean("DEFAULT",
2890
option)
1142
2891
if server_settings["port"]:
1143
2892
server_settings["port"] = server_config.getint("DEFAULT",
1144
2893
"port")
2894
if server_settings["socket"]:
2895
server_settings["socket"] = server_config.getint("DEFAULT",
2896
"socket")
2897
# Later, stdin will, and stdout and stderr might, be dup'ed
2898
# over with an opened os.devnull. But we don't want this to
2899
# happen with a supplied network socket.
2900
if 0 <= server_settings["socket"] <= 2:
2901
server_settings["socket"] = os.dup(server_settings
2902
["socket"])
1145
2903
del server_config
1146
2904
1147
2905
# Override the settings from the config file with command line
1148
2906
# options, if set.
1149
2907
for option in ("interface", "address", "port", "debug",
1150
"priority", "servicename", "configdir",
1151
"use_dbus", "use_ipv6"):
2908
"priority", "servicename", "configdir", "use_dbus",
2909
"use_ipv6", "debuglevel", "restore", "statedir",
2910
"socket", "foreground", "zeroconf"):
1152
2911
value = getattr(options, option)
1153
2912
if value is not None:
1154
2913
server_settings[option] = value
1155
2914
del options
2915
# Force all strings to be unicode
2916
for option in server_settings.keys():
2917
if isinstance(server_settings[option], bytes):
2918
server_settings[option] = (server_settings[option]
2919
.decode("utf-8"))
2920
# Force all boolean options to be boolean
2921
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2922
"foreground", "zeroconf"):
2923
server_settings[option] = bool(server_settings[option])
2924
# Debug implies foreground
2925
if server_settings["debug"]:
2926
server_settings["foreground"] = True
1156
2927
# Now we have our good server settings in "server_settings"
1157
2928
1158
2929
##################################################################
1159
2930
2931
if (not server_settings["zeroconf"]
2932
and not (server_settings["port"]
2933
or server_settings["socket"] != "")):
2934
parser.error("Needs port or socket to work without Zeroconf")
2935
1160
2936
# For convenience
1161
2937
debug = server_settings["debug"]
2938
debuglevel = server_settings["debuglevel"]
1162
2939
use_dbus = server_settings["use_dbus"]
1163
2940
use_ipv6 = server_settings["use_ipv6"]
1164
1165
if not debug:
1166
syslogger.setLevel(logging.WARNING)
1167
console.setLevel(logging.WARNING)
1168
2941
stored_state_path = os.path.join(server_settings["statedir"],
2942
stored_state_file)
2943
foreground = server_settings["foreground"]
2944
zeroconf = server_settings["zeroconf"]
2945
2946
if debug:
2947
initlogger(debug, logging.DEBUG)
2948
else:
2949
if not debuglevel:
2950
initlogger(debug)
2951
else:
2952
level = getattr(logging, debuglevel.upper())
2953
initlogger(debug, level)
2954
1169
2955
if server_settings["servicename"] != "Mandos":
1170
syslogger.setFormatter(logging.Formatter
1171
('Mandos (%s) [%%(process)d]:'
1172
' %%(levelname)s: %%(message)s'
1173
% server_settings["servicename"]))
1174
2956
syslogger.setFormatter(
2957
logging.Formatter('Mandos ({}) [%(process)d]:'
2958
' %(levelname)s: %(message)s'.format(
2959
server_settings["servicename"])))
2960
1175
2961
# Parse config file with clients
1176
client_defaults = { "timeout": "1h",
1177
"interval": "5m",
1178
"checker": "fping -q -- %%(host)s",
1179
"host": "",
1180
}
1181
client_config = ConfigParser.SafeConfigParser(client_defaults)
2962
client_config = configparser.SafeConfigParser(Client
2963
.client_defaults)
1182
2964
client_config.read(os.path.join(server_settings["configdir"],
1183
2965
"clients.conf"))
1184
2966
1185
2967
global mandos_dbus_service
1186
2968
mandos_dbus_service = None
1187
1188
clients = Set()
1189
tcp_server = IPv6_TCPServer((server_settings["address"],
1190
server_settings["port"]),
1191
TCP_handler,
1192
settings=server_settings,
1193
clients=clients, use_ipv6=use_ipv6)
1194
pidfilename = "/var/run/mandos.pid"
1195
try:
1196
pidfile = open(pidfilename, "w")
1197
except IOError:
1198
logger.error("Could not open file %r", pidfilename)
1199
1200
try:
1201
uid = pwd.getpwnam("_mandos").pw_uid
1202
gid = pwd.getpwnam("_mandos").pw_gid
1203
except KeyError:
1204
try:
1205
uid = pwd.getpwnam("mandos").pw_uid
1206
gid = pwd.getpwnam("mandos").pw_gid
2969
2970
socketfd = None
2971
if server_settings["socket"] != "":
2972
socketfd = server_settings["socket"]
2973
tcp_server = MandosServer(
2974
(server_settings["address"], server_settings["port"]),
2975
ClientHandler,
2976
interface=(server_settings["interface"] or None),
2977
use_ipv6=use_ipv6,
2978
gnutls_priority=server_settings["priority"],
2979
use_dbus=use_dbus,
2980
socketfd=socketfd)
2981
if not foreground:
2982
pidfilename = "/run/mandos.pid"
2983
if not os.path.isdir("/run/."):
2984
pidfilename = "/var/run/mandos.pid"
2985
pidfile = None
2986
try:
2987
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
2988
except IOError as e:
2989
logger.error("Could not open file %r", pidfilename,
2990
exc_info=e)
2991
2992
for name, group in (("_mandos", "_mandos"),
2993
("mandos", "mandos"),
2994
("nobody", "nogroup")):
2995
try:
2996
uid = pwd.getpwnam(name).pw_uid
2997
gid = pwd.getpwnam(group).pw_gid
2998
break
1207
2999
except KeyError:
1208
try:
1209
uid = pwd.getpwnam("nobody").pw_uid
1210
gid = pwd.getpwnam("nogroup").pw_gid
1211
except KeyError:
1212
uid = 65534
1213
gid = 65534
3000
continue
3001
else:
3002
uid = 65534
3003
gid = 65534
1214
3004
try:
1215
3005
os.setgid(gid)
1216
3006
os.setuid(uid)
1217
except OSError, error:
1218
if error[0] != errno.EPERM:
1219
raise error
1220
1221
# Enable all possible GnuTLS debugging
3007
if debug:
3008
logger.debug("Did setuid/setgid to {}:{}".format(uid,
3009
gid))
3010
except OSError as error:
3011
logger.warning("Failed to setuid/setgid to {}:{}: {}"
3012
.format(uid, gid, os.strerror(error.errno)))
3013
if error.errno != errno.EPERM:
3014
raise
3015
1222
3016
if debug:
3017
# Enable all possible GnuTLS debugging
3018
1223
3019
# "Use a log level over 10 to enable all debugging options."
1224
3020
# - GnuTLS manual
1225
gnutls.library.functions.gnutls_global_set_log_level(11)
1226
1227
@gnutls.library.types.gnutls_log_func
3021
gnutls.global_set_log_level(11)
3022
3023
@gnutls.log_func
1228
3024
def debug_gnutls(level, string):
1229
3025
logger.debug("GnuTLS: %s", string[:-1])
1230
1231
(gnutls.library.functions
1232
.gnutls_global_set_log_function(debug_gnutls))
1233
1234
global service
1235
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1236
service = AvahiService(name = server_settings["servicename"],
1237
servicetype = "_mandos._tcp",
1238
protocol = protocol)
1239
if server_settings["interface"]:
1240
service.interface = (if_nametoindex
1241
(server_settings["interface"]))
1242
3026
3027
gnutls.global_set_log_function(debug_gnutls)
3028
3029
# Redirect stdin so all checkers get /dev/null
3030
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
3031
os.dup2(null, sys.stdin.fileno())
3032
if null > 2:
3033
os.close(null)
3034
3035
# Need to fork before connecting to D-Bus
3036
if not foreground:
3037
# Close all input and output, do double fork, etc.
3038
daemon()
3039
3040
# multiprocessing will use threads, so before we use GLib we need
3041
# to inform GLib that threads will be used.
3042
GLib.threads_init()
3043
1243
3044
global main_loop
1244
global bus
1245
global server
1246
3045
# From the Avahi example code
1247
DBusGMainLoop(set_as_default=True )
1248
main_loop = gobject.MainLoop()
3046
DBusGMainLoop(set_as_default=True)
3047
main_loop = GLib.MainLoop()
1249
3048
bus = dbus.SystemBus()
1250
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
1251
avahi.DBUS_PATH_SERVER),
1252
avahi.DBUS_INTERFACE_SERVER)
1253
3049
# End of Avahi example code
1254
3050
if use_dbus:
1255
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
1256
3051
try:
3052
bus_name = dbus.service.BusName("se.recompile.Mandos",
3053
bus,
3054
do_not_queue=True)
3055
old_bus_name = dbus.service.BusName(
3056
"se.bsnet.fukt.Mandos", bus,
3057
do_not_queue=True)
3058
except dbus.exceptions.DBusException as e:
3059
logger.error("Disabling D-Bus:", exc_info=e)
3060
use_dbus = False
3061
server_settings["use_dbus"] = False
3062
tcp_server.use_dbus = False
3063
if zeroconf:
3064
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3065
service = AvahiServiceToSyslog(
3066
name=server_settings["servicename"],
3067
servicetype="_mandos._tcp",
3068
protocol=protocol,
3069
bus=bus)
3070
if server_settings["interface"]:
3071
service.interface = if_nametoindex(
3072
server_settings["interface"].encode("utf-8"))
3073
3074
global multiprocessing_manager
3075
multiprocessing_manager = multiprocessing.Manager()
3076
1257
3077
client_class = Client
1258
3078
if use_dbus:
1259
client_class = ClientDBus
1260
clients.update(Set(
1261
client_class(name = section,
1262
config= dict(client_config.items(section)))
1263
for section in client_config.sections()))
1264
if not clients:
1265
logger.warning(u"No clients defined")
1266
1267
if debug:
1268
# Redirect stdin so all checkers get /dev/null
1269
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1270
os.dup2(null, sys.stdin.fileno())
1271
if null > 2:
1272
os.close(null)
1273
else:
1274
# No console logging
1275
logger.removeHandler(console)
1276
# Close all input and output, do double fork, etc.
1277
daemon()
1278
1279
try:
1280
with closing(pidfile):
3079
client_class = functools.partial(ClientDBus, bus=bus)
3080
3081
client_settings = Client.config_parser(client_config)
3082
old_client_settings = {}
3083
clients_data = {}
3084
3085
# This is used to redirect stdout and stderr for checker processes
3086
global wnull
3087
wnull = open(os.devnull, "w") # A writable /dev/null
3088
# Only used if server is running in foreground but not in debug
3089
# mode
3090
if debug or not foreground:
3091
wnull.close()
3092
3093
# Get client data and settings from last running state.
3094
if server_settings["restore"]:
3095
try:
3096
with open(stored_state_path, "rb") as stored_state:
3097
if sys.version_info.major == 2:
3098
clients_data, old_client_settings = pickle.load(
3099
stored_state)
3100
else:
3101
bytes_clients_data, bytes_old_client_settings = (
3102
pickle.load(stored_state, encoding="bytes"))
3103
# Fix bytes to strings
3104
# clients_data
3105
# .keys()
3106
clients_data = {(key.decode("utf-8")
3107
if isinstance(key, bytes)
3108
else key): value
3109
for key, value in
3110
bytes_clients_data.items()}
3111
del bytes_clients_data
3112
for key in clients_data:
3113
value = {(k.decode("utf-8")
3114
if isinstance(k, bytes) else k): v
3115
for k, v in
3116
clients_data[key].items()}
3117
clients_data[key] = value
3118
# .client_structure
3119
value["client_structure"] = [
3120
(s.decode("utf-8")
3121
if isinstance(s, bytes)
3122
else s) for s in
3123
value["client_structure"]]
3124
# .name & .host
3125
for k in ("name", "host"):
3126
if isinstance(value[k], bytes):
3127
value[k] = value[k].decode("utf-8")
3128
# old_client_settings
3129
# .keys()
3130
old_client_settings = {
3131
(key.decode("utf-8")
3132
if isinstance(key, bytes)
3133
else key): value
3134
for key, value in
3135
bytes_old_client_settings.items()}
3136
del bytes_old_client_settings
3137
# .host
3138
for value in old_client_settings.values():
3139
if isinstance(value["host"], bytes):
3140
value["host"] = (value["host"]
3141
.decode("utf-8"))
3142
os.remove(stored_state_path)
3143
except IOError as e:
3144
if e.errno == errno.ENOENT:
3145
logger.warning("Could not load persistent state:"
3146
" {}".format(os.strerror(e.errno)))
3147
else:
3148
logger.critical("Could not load persistent state:",
3149
exc_info=e)
3150
raise
3151
except EOFError as e:
3152
logger.warning("Could not load persistent state: "
3153
"EOFError:",
3154
exc_info=e)
3155
3156
with PGPEngine() as pgp:
3157
for client_name, client in clients_data.items():
3158
# Skip removed clients
3159
if client_name not in client_settings:
3160
continue
3161
3162
# Decide which value to use after restoring saved state.
3163
# We have three different values: Old config file,
3164
# new config file, and saved state.
3165
# New config value takes precedence if it differs from old
3166
# config value, otherwise use saved state.
3167
for name, value in client_settings[client_name].items():
3168
try:
3169
# For each value in new config, check if it
3170
# differs from the old config value (Except for
3171
# the "secret" attribute)
3172
if (name != "secret"
3173
and (value !=
3174
old_client_settings[client_name][name])):
3175
client[name] = value
3176
except KeyError:
3177
pass
3178
3179
# Clients who has passed its expire date can still be
3180
# enabled if its last checker was successful. A Client
3181
# whose checker succeeded before we stored its state is
3182
# assumed to have successfully run all checkers during
3183
# downtime.
3184
if client["enabled"]:
3185
if datetime.datetime.utcnow() >= client["expires"]:
3186
if not client["last_checked_ok"]:
3187
logger.warning(
3188
"disabling client {} - Client never "
3189
"performed a successful checker".format(
3190
client_name))
3191
client["enabled"] = False
3192
elif client["last_checker_status"] != 0:
3193
logger.warning(
3194
"disabling client {} - Client last"
3195
" checker failed with error code"
3196
" {}".format(
3197
client_name,
3198
client["last_checker_status"]))
3199
client["enabled"] = False
3200
else:
3201
client["expires"] = (
3202
datetime.datetime.utcnow()
3203
+ client["timeout"])
3204
logger.debug("Last checker succeeded,"
3205
" keeping {} enabled".format(
3206
client_name))
3207
try:
3208
client["secret"] = pgp.decrypt(
3209
client["encrypted_secret"],
3210
client_settings[client_name]["secret"])
3211
except PGPError:
3212
# If decryption fails, we use secret from new settings
3213
logger.debug("Failed to decrypt {} old secret".format(
3214
client_name))
3215
client["secret"] = (client_settings[client_name]
3216
["secret"])
3217
3218
# Add/remove clients based on new changes made to config
3219
for client_name in (set(old_client_settings)
3220
- set(client_settings)):
3221
del clients_data[client_name]
3222
for client_name in (set(client_settings)
3223
- set(old_client_settings)):
3224
clients_data[client_name] = client_settings[client_name]
3225
3226
# Create all client objects
3227
for client_name, client in clients_data.items():
3228
tcp_server.clients[client_name] = client_class(
3229
name=client_name,
3230
settings=client,
3231
server_settings=server_settings)
3232
3233
if not tcp_server.clients:
3234
logger.warning("No clients defined")
3235
3236
if not foreground:
3237
if pidfile is not None:
1281
3238
pid = os.getpid()
1282
pidfile.write(str(pid) + "\n")
3239
try:
3240
with pidfile:
3241
print(pid, file=pidfile)
3242
except IOError:
3243
logger.error("Could not write to file %r with PID %d",
3244
pidfilename, pid)
1283
3245
del pidfile
1284
except IOError:
1285
logger.error(u"Could not write to file %r with PID %d",
1286
pidfilename, pid)
1287
except NameError:
1288
# "pidfile" was never created
1289
pass
1290
del pidfilename
1291
1292
def cleanup():
1293
"Cleanup function; run on exit"
1294
global group
1295
# From the Avahi example code
1296
if not group is None:
1297
group.Free()
1298
group = None
1299
# End of Avahi example code
1300
1301
while clients:
1302
client = clients.pop()
1303
client.disable_hook = None
1304
client.disable()
1305
1306
atexit.register(cleanup)
1307
1308
if not debug:
1309
signal.signal(signal.SIGINT, signal.SIG_IGN)
1310
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1311
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1312
3246
del pidfilename
3247
3248
for termsig in (signal.SIGHUP, signal.SIGTERM):
3249
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3250
lambda: main_loop.quit() and False)
3251
1313
3252
if use_dbus:
1314
class MandosDBusService(dbus.service.Object):
3253
3254
@alternate_dbus_interfaces(
3255
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3256
class MandosDBusService(DBusObjectWithObjectManager):
1315
3257
"""A D-Bus proxy object"""
3258
1316
3259
def __init__(self):
1317
3260
dbus.service.Object.__init__(self, bus, "/")
1318
_interface = u"se.bsnet.fukt.Mandos"
1319
1320
@dbus.service.signal(_interface, signature="oa{sv}")
1321
def ClientAdded(self, objpath, properties):
1322
"D-Bus signal"
1323
pass
1324
1325
@dbus.service.signal(_interface, signature="s")
1326
def ClientNotFound(self, fingerprint):
1327
"D-Bus signal"
1328
pass
1329
3261
3262
_interface = "se.recompile.Mandos"
3263
3264
@dbus.service.signal(_interface, signature="o")
3265
def ClientAdded(self, objpath):
3266
"D-Bus signal"
3267
pass
3268
3269
@dbus.service.signal(_interface, signature="ss")
3270
def ClientNotFound(self, fingerprint, address):
3271
"D-Bus signal"
3272
pass
3273
3274
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3275
"true"})
1330
3276
@dbus.service.signal(_interface, signature="os")
1331
3277
def ClientRemoved(self, objpath, name):
1332
3278
"D-Bus signal"
1333
3279
pass
1334
3280
3281
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3282
"true"})
1335
3283
@dbus.service.method(_interface, out_signature="ao")
1336
3284
def GetAllClients(self):
1337
3285
"D-Bus method"
1338
return dbus.Array(c.dbus_object_path for c in clients)
1339
1340
@dbus.service.method(_interface, out_signature="a{oa{sv}}")
3286
return dbus.Array(c.dbus_object_path for c in
3287
tcp_server.clients.values())
3288
3289
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3290
"true"})
3291
@dbus.service.method(_interface,
3292
out_signature="a{oa{sv}}")
1341
3293
def GetAllClientsWithProperties(self):
1342
3294
"D-Bus method"
1343
3295
return dbus.Dictionary(
1344
((c.dbus_object_path, c.GetAllProperties())
1345
for c in clients),
3296
{c.dbus_object_path: c.GetAll(
3297
"se.recompile.Mandos.Client")
3298
for c in tcp_server.clients.values()},
1346
3299
signature="oa{sv}")
1347
3300
1348
3301
@dbus.service.method(_interface, in_signature="o")
1349
3302
def RemoveClient(self, object_path):
1350
3303
"D-Bus method"
1351
for c in clients:
3304
for c in tcp_server.clients.values():
1352
3305
if c.dbus_object_path == object_path:
1353
clients.remove(c)
3306
del tcp_server.clients[c.name]
1354
3307
c.remove_from_connection()
1355
# Don't signal anything except ClientRemoved
1356
c.disable(signal=False)
1357
# Emit D-Bus signal
1358
self.ClientRemoved(object_path, c.name)
3308
# Don't signal the disabling
3309
c.disable(quiet=True)
3310
# Emit D-Bus signal for removal
3311
self.client_removed_signal(c)
1359
3312
return
1360
raise KeyError
1361
3313
raise KeyError(object_path)
3314
1362
3315
del _interface
1363
3316
3317
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3318
out_signature="a{oa{sa{sv}}}")
3319
def GetManagedObjects(self):
3320
"""D-Bus method"""
3321
return dbus.Dictionary(
3322
{client.dbus_object_path:
3323
dbus.Dictionary(
3324
{interface: client.GetAll(interface)
3325
for interface in
3326
client._get_all_interface_names()})
3327
for client in tcp_server.clients.values()})
3328
3329
def client_added_signal(self, client):
3330
"""Send the new standard signal and the old signal"""
3331
if use_dbus:
3332
# New standard signal
3333
self.InterfacesAdded(
3334
client.dbus_object_path,
3335
dbus.Dictionary(
3336
{interface: client.GetAll(interface)
3337
for interface in
3338
client._get_all_interface_names()}))
3339
# Old signal
3340
self.ClientAdded(client.dbus_object_path)
3341
3342
def client_removed_signal(self, client):
3343
"""Send the new standard signal and the old signal"""
3344
if use_dbus:
3345
# New standard signal
3346
self.InterfacesRemoved(
3347
client.dbus_object_path,
3348
client._get_all_interface_names())
3349
# Old signal
3350
self.ClientRemoved(client.dbus_object_path,
3351
client.name)
3352
1364
3353
mandos_dbus_service = MandosDBusService()
1365
1366
for client in clients:
3354
3355
# Save modules to variables to exempt the modules from being
3356
# unloaded before the function registered with atexit() is run.
3357
mp = multiprocessing
3358
wn = wnull
3359
3360
def cleanup():
3361
"Cleanup function; run on exit"
3362
if zeroconf:
3363
service.cleanup()
3364
3365
mp.active_children()
3366
wn.close()
3367
if not (tcp_server.clients or client_settings):
3368
return
3369
3370
# Store client before exiting. Secrets are encrypted with key
3371
# based on what config file has. If config file is
3372
# removed/edited, old secret will thus be unrecovable.
3373
clients = {}
3374
with PGPEngine() as pgp:
3375
for client in tcp_server.clients.values():
3376
key = client_settings[client.name]["secret"]
3377
client.encrypted_secret = pgp.encrypt(client.secret,
3378
key)
3379
client_dict = {}
3380
3381
# A list of attributes that can not be pickled
3382
# + secret.
3383
exclude = {"bus", "changedstate", "secret",
3384
"checker", "server_settings"}
3385
for name, typ in inspect.getmembers(dbus.service
3386
.Object):
3387
exclude.add(name)
3388
3389
client_dict["encrypted_secret"] = (client
3390
.encrypted_secret)
3391
for attr in client.client_structure:
3392
if attr not in exclude:
3393
client_dict[attr] = getattr(client, attr)
3394
3395
clients[client.name] = client_dict
3396
del client_settings[client.name]["secret"]
3397
3398
try:
3399
with tempfile.NamedTemporaryFile(
3400
mode='wb',
3401
suffix=".pickle",
3402
prefix='clients-',
3403
dir=os.path.dirname(stored_state_path),
3404
delete=False) as stored_state:
3405
pickle.dump((clients, client_settings), stored_state,
3406
protocol=2)
3407
tempname = stored_state.name
3408
os.rename(tempname, stored_state_path)
3409
except (IOError, OSError) as e:
3410
if not debug:
3411
try:
3412
os.remove(tempname)
3413
except NameError:
3414
pass
3415
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
3416
logger.warning("Could not save persistent state: {}"
3417
.format(os.strerror(e.errno)))
3418
else:
3419
logger.warning("Could not save persistent state:",
3420
exc_info=e)
3421
raise
3422
3423
# Delete all clients, and settings from config
3424
while tcp_server.clients:
3425
name, client = tcp_server.clients.popitem()
3426
if use_dbus:
3427
client.remove_from_connection()
3428
# Don't signal the disabling
3429
client.disable(quiet=True)
3430
# Emit D-Bus signal for removal
3431
if use_dbus:
3432
mandos_dbus_service.client_removed_signal(client)
3433
client_settings.clear()
3434
3435
atexit.register(cleanup)
3436
3437
for client in tcp_server.clients.values():
1367
3438
if use_dbus:
1368
# Emit D-Bus signal
1369
mandos_dbus_service.ClientAdded(client.dbus_object_path,
1370
client.GetAllProperties())
1371
client.enable()
1372
3439
# Emit D-Bus signal for adding
3440
mandos_dbus_service.client_added_signal(client)
3441
# Need to initiate checking of clients
3442
if client.enabled:
3443
client.init_checker()
3444
1373
3445
tcp_server.enable()
1374
3446
tcp_server.server_activate()
1375
3447
1376
3448
# Find out what port we got
1377
service.port = tcp_server.socket.getsockname()[1]
3449
if zeroconf:
3450
service.port = tcp_server.socket.getsockname()[1]
1378
3451
if use_ipv6:
1379
logger.info(u"Now listening on address %r, port %d,"
1380
" flowinfo %d, scope_id %d"
1381
% tcp_server.socket.getsockname())
3452
logger.info("Now listening on address %r, port %d,"
3453
" flowinfo %d, scope_id %d",
3454
*tcp_server.socket.getsockname())
1382
3455
else: # IPv4
1383
logger.info(u"Now listening on address %r, port %d"
1384
% tcp_server.socket.getsockname())
1385
1386
#service.interface = tcp_server.socket.getsockname()[3]
1387
3456
logger.info("Now listening on address %r, port %d",
3457
*tcp_server.socket.getsockname())
3458
3459
# service.interface = tcp_server.socket.getsockname()[3]
3460
1388
3461
try:
1389
# From the Avahi example code
1390
server.connect_to_signal("StateChanged", server_state_changed)
1391
try:
1392
server_state_changed(server.GetState())
1393
except dbus.exceptions.DBusException, error:
1394
logger.critical(u"DBusException: %s", error)
1395
sys.exit(1)
1396
# End of Avahi example code
1397
1398
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
1399
lambda *args, **kwargs:
1400
(tcp_server.handle_request
1401
(*args[2:], **kwargs) or True))
1402
1403
logger.debug(u"Starting main loop")
3462
if zeroconf:
3463
# From the Avahi example code
3464
try:
3465
service.activate()
3466
except dbus.exceptions.DBusException as error:
3467
logger.critical("D-Bus Exception", exc_info=error)
3468
cleanup()
3469
sys.exit(1)
3470
# End of Avahi example code
3471
3472
GLib.io_add_watch(tcp_server.fileno(), GLib.IO_IN,
3473
lambda *args, **kwargs:
3474
(tcp_server.handle_request
3475
(*args[2:], **kwargs) or True))
3476
3477
logger.debug("Starting main loop")
1404
3478
main_loop.run()
1405
except AvahiError, error:
1406
logger.critical(u"AvahiError: %s", error)
3479
except AvahiError as error:
3480
logger.critical("Avahi Error", exc_info=error)
3481
cleanup()
1407
3482
sys.exit(1)
1408
3483
except KeyboardInterrupt:
1409
3484
if debug:
1410
print >> sys.stderr
3485
print("", file=sys.stderr)
1411
3486
logger.debug("Server received KeyboardInterrupt")
1412
3487
logger.debug("Server exiting")
3488
# Must run before the D-Bus bus name gets deregistered
3489
cleanup()
3490
1413
3491
1414
3492
if __name__ == '__main__':
1415
3493
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0