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- Committer: Teddy Hogeborn
- Date: 2018-02-06 20:03:50 UTC
- Revision ID: teddy@recompile.se-20180206200350-jzvorueb731xkph3
Update Debian Debhelper compatibility version.
* (debian/compat): Change to "10".
* (debian/compat): Change to "10".
- files added:
- bugs.xml
- debian/upstream
- network-hooks.d
- plugin-helpers
- files modified:
- .bzrignore
added
removed
mandos
1
1
#!/usr/bin/python
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2
# -*- mode: python; coding: utf-8 -*-
3
#
3
#
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4
# Mandos server - give out binary blobs to connecting clients.
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#
5
#
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6
# This program is partly derived from an example program for an Avahi
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7
# service publisher, downloaded from
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# <http://avahi.org/wiki/PythonPublishExample>. This includes the
9
9
# methods "add", "remove", "server_state_changed",
10
10
# "entry_group_state_changed", "cleanup", and "activate" in the
11
11
# "AvahiService" class, and some lines in "main".
12
#
12
#
13
13
# Everything else is
14
# Copyright © 2008-2011 Teddy Hogeborn
15
# Copyright © 2008-2011 Björn Påhlsson
16
#
17
# This program is free software: you can redistribute it and/or modify
18
# it under the terms of the GNU General Public License as published by
14
# Copyright © 2008-2017 Teddy Hogeborn
15
# Copyright © 2008-2017 Björn Påhlsson
16
#
17
# This file is part of Mandos.
18
#
19
# Mandos is free software: you can redistribute it and/or modify it
20
# under the terms of the GNU General Public License as published by
19
21
# the Free Software Foundation, either version 3 of the License, or
20
22
# (at your option) any later version.
21
23
#
22
# This program is distributed in the hope that it will be useful,
23
# but WITHOUT ANY WARRANTY; without even the implied warranty of
24
# Mandos is distributed in the hope that it will be useful, but
25
# WITHOUT ANY WARRANTY; without even the implied warranty of
24
26
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
25
27
# GNU General Public License for more details.
26
#
28
#
27
29
# You should have received a copy of the GNU General Public License
28
# along with this program. If not, see
29
# <http://www.gnu.org/licenses/>.
30
#
31
# Contact the authors at <mandos@fukt.bsnet.se>.
32
#
30
# along with Mandos. If not, see <http://www.gnu.org/licenses/>.
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#
32
# Contact the authors at <mandos@recompile.se>.
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#
33
34
34
35
from __future__ import (division, absolute_import, print_function,
35
36
unicode_literals)
36
37
37
import SocketServer as socketserver
38
try:
39
from future_builtins import *
40
except ImportError:
41
pass
42
43
try:
44
import SocketServer as socketserver
45
except ImportError:
46
import socketserver
38
47
import socket
39
48
import argparse
40
49
import datetime
41
50
import errno
42
import gnutls.crypto
43
import gnutls.connection
44
import gnutls.errors
45
import gnutls.library.functions
46
import gnutls.library.constants
47
import gnutls.library.types
48
import ConfigParser as configparser
51
try:
52
import ConfigParser as configparser
53
except ImportError:
54
import configparser
49
55
import sys
50
56
import re
51
57
import os
60
66
import struct
61
67
import fcntl
62
68
import functools
63
import cPickle as pickle
69
try:
70
import cPickle as pickle
71
except ImportError:
72
import pickle
64
73
import multiprocessing
74
import types
75
import binascii
76
import tempfile
77
import itertools
78
import collections
79
import codecs
65
80
66
81
import dbus
67
82
import dbus.service
68
import gobject
69
import avahi
83
from gi.repository import GLib
70
84
from dbus.mainloop.glib import DBusGMainLoop
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85
import ctypes
72
86
import ctypes.util
73
87
import xml.dom.minidom
74
88
import inspect
75
89
90
# Try to find the value of SO_BINDTODEVICE:
76
91
try:
92
# This is where SO_BINDTODEVICE is in Python 3.3 (or 3.4?) and
93
# newer, and it is also the most natural place for it:
77
94
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
78
95
except AttributeError:
79
96
try:
97
# This is where SO_BINDTODEVICE was up to and including Python
98
# 2.6, and also 3.2:
80
99
from IN import SO_BINDTODEVICE
81
100
except ImportError:
82
SO_BINDTODEVICE = None
83
84
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version = "1.3.1"
86
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#logger = logging.getLogger('mandos')
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logger = logging.Logger('mandos')
89
syslogger = (logging.handlers.SysLogHandler
90
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
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address = str("/dev/log")))
92
syslogger.setFormatter(logging.Formatter
93
('Mandos [%(process)d]: %(levelname)s:'
94
' %(message)s'))
95
logger.addHandler(syslogger)
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97
console = logging.StreamHandler()
98
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
99
' %(levelname)s:'
100
' %(message)s'))
101
logger.addHandler(console)
101
# In Python 2.7 it seems to have been removed entirely.
102
# Try running the C preprocessor:
103
try:
104
cc = subprocess.Popen(["cc", "--language=c", "-E",
105
"/dev/stdin"],
106
stdin=subprocess.PIPE,
107
stdout=subprocess.PIPE)
108
stdout = cc.communicate(
109
"#include <sys/socket.h>\nSO_BINDTODEVICE\n")[0]
110
SO_BINDTODEVICE = int(stdout.splitlines()[-1])
111
except (OSError, ValueError, IndexError):
112
# No value found
113
SO_BINDTODEVICE = None
114
115
if sys.version_info.major == 2:
116
str = unicode
117
118
version = "1.7.16"
119
stored_state_file = "clients.pickle"
120
121
logger = logging.getLogger()
122
syslogger = None
123
124
try:
125
if_nametoindex = ctypes.cdll.LoadLibrary(
126
ctypes.util.find_library("c")).if_nametoindex
127
except (OSError, AttributeError):
128
129
def if_nametoindex(interface):
130
"Get an interface index the hard way, i.e. using fcntl()"
131
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
132
with contextlib.closing(socket.socket()) as s:
133
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
134
struct.pack(b"16s16x", interface))
135
interface_index = struct.unpack("I", ifreq[16:20])[0]
136
return interface_index
137
138
139
def copy_function(func):
140
"""Make a copy of a function"""
141
if sys.version_info.major == 2:
142
return types.FunctionType(func.func_code,
143
func.func_globals,
144
func.func_name,
145
func.func_defaults,
146
func.func_closure)
147
else:
148
return types.FunctionType(func.__code__,
149
func.__globals__,
150
func.__name__,
151
func.__defaults__,
152
func.__closure__)
153
154
155
def initlogger(debug, level=logging.WARNING):
156
"""init logger and add loglevel"""
157
158
global syslogger
159
syslogger = (logging.handlers.SysLogHandler(
160
facility=logging.handlers.SysLogHandler.LOG_DAEMON,
161
address="/dev/log"))
162
syslogger.setFormatter(logging.Formatter
163
('Mandos [%(process)d]: %(levelname)s:'
164
' %(message)s'))
165
logger.addHandler(syslogger)
166
167
if debug:
168
console = logging.StreamHandler()
169
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
170
' [%(process)d]:'
171
' %(levelname)s:'
172
' %(message)s'))
173
logger.addHandler(console)
174
logger.setLevel(level)
175
176
177
class PGPError(Exception):
178
"""Exception if encryption/decryption fails"""
179
pass
180
181
182
class PGPEngine(object):
183
"""A simple class for OpenPGP symmetric encryption & decryption"""
184
185
def __init__(self):
186
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
187
self.gpg = "gpg"
188
try:
189
output = subprocess.check_output(["gpgconf"])
190
for line in output.splitlines():
191
name, text, path = line.split(b":")
192
if name == "gpg":
193
self.gpg = path
194
break
195
except OSError as e:
196
if e.errno != errno.ENOENT:
197
raise
198
self.gnupgargs = ['--batch',
199
'--homedir', self.tempdir,
200
'--force-mdc',
201
'--quiet']
202
# Only GPG version 1 has the --no-use-agent option.
203
if self.gpg == "gpg" or self.gpg.endswith("/gpg"):
204
self.gnupgargs.append("--no-use-agent")
205
206
def __enter__(self):
207
return self
208
209
def __exit__(self, exc_type, exc_value, traceback):
210
self._cleanup()
211
return False
212
213
def __del__(self):
214
self._cleanup()
215
216
def _cleanup(self):
217
if self.tempdir is not None:
218
# Delete contents of tempdir
219
for root, dirs, files in os.walk(self.tempdir,
220
topdown=False):
221
for filename in files:
222
os.remove(os.path.join(root, filename))
223
for dirname in dirs:
224
os.rmdir(os.path.join(root, dirname))
225
# Remove tempdir
226
os.rmdir(self.tempdir)
227
self.tempdir = None
228
229
def password_encode(self, password):
230
# Passphrase can not be empty and can not contain newlines or
231
# NUL bytes. So we prefix it and hex encode it.
232
encoded = b"mandos" + binascii.hexlify(password)
233
if len(encoded) > 2048:
234
# GnuPG can't handle long passwords, so encode differently
235
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
236
.replace(b"\n", b"\\n")
237
.replace(b"\0", b"\\x00"))
238
return encoded
239
240
def encrypt(self, data, password):
241
passphrase = self.password_encode(password)
242
with tempfile.NamedTemporaryFile(
243
dir=self.tempdir) as passfile:
244
passfile.write(passphrase)
245
passfile.flush()
246
proc = subprocess.Popen([self.gpg, '--symmetric',
247
'--passphrase-file',
248
passfile.name]
249
+ self.gnupgargs,
250
stdin=subprocess.PIPE,
251
stdout=subprocess.PIPE,
252
stderr=subprocess.PIPE)
253
ciphertext, err = proc.communicate(input=data)
254
if proc.returncode != 0:
255
raise PGPError(err)
256
return ciphertext
257
258
def decrypt(self, data, password):
259
passphrase = self.password_encode(password)
260
with tempfile.NamedTemporaryFile(
261
dir=self.tempdir) as passfile:
262
passfile.write(passphrase)
263
passfile.flush()
264
proc = subprocess.Popen([self.gpg, '--decrypt',
265
'--passphrase-file',
266
passfile.name]
267
+ self.gnupgargs,
268
stdin=subprocess.PIPE,
269
stdout=subprocess.PIPE,
270
stderr=subprocess.PIPE)
271
decrypted_plaintext, err = proc.communicate(input=data)
272
if proc.returncode != 0:
273
raise PGPError(err)
274
return decrypted_plaintext
275
276
277
# Pretend that we have an Avahi module
278
class Avahi(object):
279
"""This isn't so much a class as it is a module-like namespace.
280
It is instantiated once, and simulates having an Avahi module."""
281
IF_UNSPEC = -1 # avahi-common/address.h
282
PROTO_UNSPEC = -1 # avahi-common/address.h
283
PROTO_INET = 0 # avahi-common/address.h
284
PROTO_INET6 = 1 # avahi-common/address.h
285
DBUS_NAME = "org.freedesktop.Avahi"
286
DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"
287
DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"
288
DBUS_PATH_SERVER = "/"
289
290
def string_array_to_txt_array(self, t):
291
return dbus.Array((dbus.ByteArray(s.encode("utf-8"))
292
for s in t), signature="ay")
293
ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h
294
ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h
295
ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h
296
SERVER_INVALID = 0 # avahi-common/defs.h
297
SERVER_REGISTERING = 1 # avahi-common/defs.h
298
SERVER_RUNNING = 2 # avahi-common/defs.h
299
SERVER_COLLISION = 3 # avahi-common/defs.h
300
SERVER_FAILURE = 4 # avahi-common/defs.h
301
avahi = Avahi()
302
102
303
103
304
class AvahiError(Exception):
104
305
def __init__(self, value, *args, **kwargs):
105
306
self.value = value
106
super(AvahiError, self).__init__(value, *args, **kwargs)
107
def __unicode__(self):
108
return unicode(repr(self.value))
307
return super(AvahiError, self).__init__(value, *args,
308
**kwargs)
309
109
310
110
311
class AvahiServiceError(AvahiError):
111
312
pass
112
313
314
113
315
class AvahiGroupError(AvahiError):
114
316
pass
115
317
116
318
117
319
class AvahiService(object):
118
320
"""An Avahi (Zeroconf) service.
119
321
120
322
Attributes:
121
323
interface: integer; avahi.IF_UNSPEC or an interface index.
122
324
Used to optionally bind to the specified interface.
123
325
name: string; Example: 'Mandos'
124
326
type: string; Example: '_mandos._tcp'.
125
See <http://www.dns-sd.org/ServiceTypes.html>
327
See <https://www.iana.org/assignments/service-names-port-numbers>
126
328
port: integer; what port to announce
127
329
TXT: list of strings; TXT record for the service
128
330
domain: string; Domain to publish on, default to .local if empty.
134
336
server: D-Bus Server
135
337
bus: dbus.SystemBus()
136
338
"""
137
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
138
servicetype = None, port = None, TXT = None,
139
domain = "", host = "", max_renames = 32768,
140
protocol = avahi.PROTO_UNSPEC, bus = None):
339
340
def __init__(self,
341
interface=avahi.IF_UNSPEC,
342
name=None,
343
servicetype=None,
344
port=None,
345
TXT=None,
346
domain="",
347
host="",
348
max_renames=32768,
349
protocol=avahi.PROTO_UNSPEC,
350
bus=None):
141
351
self.interface = interface
142
352
self.name = name
143
353
self.type = servicetype
152
362
self.server = None
153
363
self.bus = bus
154
364
self.entry_group_state_changed_match = None
155
def rename(self):
365
366
def rename(self, remove=True):
156
367
"""Derived from the Avahi example code"""
157
368
if self.rename_count >= self.max_renames:
158
369
logger.critical("No suitable Zeroconf service name found"
159
370
" after %i retries, exiting.",
160
371
self.rename_count)
161
372
raise AvahiServiceError("Too many renames")
162
self.name = unicode(self.server.GetAlternativeServiceName(self.name))
373
self.name = str(
374
self.server.GetAlternativeServiceName(self.name))
375
self.rename_count += 1
163
376
logger.info("Changing Zeroconf service name to %r ...",
164
377
self.name)
165
syslogger.setFormatter(logging.Formatter
166
('Mandos (%s) [%%(process)d]:'
167
' %%(levelname)s: %%(message)s'
168
% self.name))
169
self.remove()
378
if remove:
379
self.remove()
170
380
try:
171
381
self.add()
172
382
except dbus.exceptions.DBusException as error:
173
logger.critical("DBusException: %s", error)
174
self.cleanup()
175
os._exit(1)
176
self.rename_count += 1
383
if (error.get_dbus_name()
384
== "org.freedesktop.Avahi.CollisionError"):
385
logger.info("Local Zeroconf service name collision.")
386
return self.rename(remove=False)
387
else:
388
logger.critical("D-Bus Exception", exc_info=error)
389
self.cleanup()
390
os._exit(1)
391
177
392
def remove(self):
178
393
"""Derived from the Avahi example code"""
179
394
if self.entry_group_state_changed_match is not None:
181
396
self.entry_group_state_changed_match = None
182
397
if self.group is not None:
183
398
self.group.Reset()
399
184
400
def add(self):
185
401
"""Derived from the Avahi example code"""
186
402
self.remove()
191
407
avahi.DBUS_INTERFACE_ENTRY_GROUP)
192
408
self.entry_group_state_changed_match = (
193
409
self.group.connect_to_signal(
194
'StateChanged', self .entry_group_state_changed))
410
'StateChanged', self.entry_group_state_changed))
195
411
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
196
412
self.name, self.type)
197
413
self.group.AddService(
203
419
dbus.UInt16(self.port),
204
420
avahi.string_array_to_txt_array(self.TXT))
205
421
self.group.Commit()
422
206
423
def entry_group_state_changed(self, state, error):
207
424
"""Derived from the Avahi example code"""
208
425
logger.debug("Avahi entry group state change: %i", state)
209
426
210
427
if state == avahi.ENTRY_GROUP_ESTABLISHED:
211
428
logger.debug("Zeroconf service established.")
212
429
elif state == avahi.ENTRY_GROUP_COLLISION:
214
431
self.rename()
215
432
elif state == avahi.ENTRY_GROUP_FAILURE:
216
433
logger.critical("Avahi: Error in group state changed %s",
217
unicode(error))
218
raise AvahiGroupError("State changed: %s"
219
% unicode(error))
434
str(error))
435
raise AvahiGroupError("State changed: {!s}".format(error))
436
220
437
def cleanup(self):
221
438
"""Derived from the Avahi example code"""
222
439
if self.group is not None:
223
440
try:
224
441
self.group.Free()
225
442
except (dbus.exceptions.UnknownMethodException,
226
dbus.exceptions.DBusException) as e:
443
dbus.exceptions.DBusException):
227
444
pass
228
445
self.group = None
229
446
self.remove()
447
230
448
def server_state_changed(self, state, error=None):
231
449
"""Derived from the Avahi example code"""
232
450
logger.debug("Avahi server state change: %i", state)
233
bad_states = { avahi.SERVER_INVALID:
234
"Zeroconf server invalid",
235
avahi.SERVER_REGISTERING: None,
236
avahi.SERVER_COLLISION:
237
"Zeroconf server name collision",
238
avahi.SERVER_FAILURE:
239
"Zeroconf server failure" }
451
bad_states = {
452
avahi.SERVER_INVALID: "Zeroconf server invalid",
453
avahi.SERVER_REGISTERING: None,
454
avahi.SERVER_COLLISION: "Zeroconf server name collision",
455
avahi.SERVER_FAILURE: "Zeroconf server failure",
456
}
240
457
if state in bad_states:
241
458
if bad_states[state] is not None:
242
459
if error is None:
245
462
logger.error(bad_states[state] + ": %r", error)
246
463
self.cleanup()
247
464
elif state == avahi.SERVER_RUNNING:
248
self.add()
465
try:
466
self.add()
467
except dbus.exceptions.DBusException as error:
468
if (error.get_dbus_name()
469
== "org.freedesktop.Avahi.CollisionError"):
470
logger.info("Local Zeroconf service name"
471
" collision.")
472
return self.rename(remove=False)
473
else:
474
logger.critical("D-Bus Exception", exc_info=error)
475
self.cleanup()
476
os._exit(1)
249
477
else:
250
478
if error is None:
251
479
logger.debug("Unknown state: %r", state)
252
480
else:
253
481
logger.debug("Unknown state: %r: %r", state, error)
482
254
483
def activate(self):
255
484
"""Derived from the Avahi example code"""
256
485
if self.server is None:
260
489
follow_name_owner_changes=True),
261
490
avahi.DBUS_INTERFACE_SERVER)
262
491
self.server.connect_to_signal("StateChanged",
263
self.server_state_changed)
492
self.server_state_changed)
264
493
self.server_state_changed(self.server.GetState())
265
494
266
495
267
def _timedelta_to_milliseconds(td):
268
"Convert a datetime.timedelta() to milliseconds"
269
return ((td.days * 24 * 60 * 60 * 1000)
270
+ (td.seconds * 1000)
271
+ (td.microseconds // 1000))
272
496
class AvahiServiceToSyslog(AvahiService):
497
def rename(self, *args, **kwargs):
498
"""Add the new name to the syslog messages"""
499
ret = super(AvahiServiceToSyslog, self).rename(self, *args,
500
**kwargs)
501
syslogger.setFormatter(logging.Formatter(
502
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
503
.format(self.name)))
504
return ret
505
506
507
# Pretend that we have a GnuTLS module
508
class GnuTLS(object):
509
"""This isn't so much a class as it is a module-like namespace.
510
It is instantiated once, and simulates having a GnuTLS module."""
511
512
library = ctypes.util.find_library("gnutls")
513
if library is None:
514
library = ctypes.util.find_library("gnutls-deb0")
515
_library = ctypes.cdll.LoadLibrary(library)
516
del library
517
_need_version = b"3.3.0"
518
519
def __init__(self):
520
# Need to use "self" here, since this method is called before
521
# the assignment to the "gnutls" global variable happens.
522
if self.check_version(self._need_version) is None:
523
raise self.Error("Needs GnuTLS {} or later"
524
.format(self._need_version))
525
526
# Unless otherwise indicated, the constants and types below are
527
# all from the gnutls/gnutls.h C header file.
528
529
# Constants
530
E_SUCCESS = 0
531
E_INTERRUPTED = -52
532
E_AGAIN = -28
533
CRT_OPENPGP = 2
534
CLIENT = 2
535
SHUT_RDWR = 0
536
CRD_CERTIFICATE = 1
537
E_NO_CERTIFICATE_FOUND = -49
538
OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
539
540
# Types
541
class session_int(ctypes.Structure):
542
_fields_ = []
543
session_t = ctypes.POINTER(session_int)
544
545
class certificate_credentials_st(ctypes.Structure):
546
_fields_ = []
547
certificate_credentials_t = ctypes.POINTER(
548
certificate_credentials_st)
549
certificate_type_t = ctypes.c_int
550
551
class datum_t(ctypes.Structure):
552
_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
553
('size', ctypes.c_uint)]
554
555
class openpgp_crt_int(ctypes.Structure):
556
_fields_ = []
557
openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
558
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
559
log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
560
credentials_type_t = ctypes.c_int
561
transport_ptr_t = ctypes.c_void_p
562
close_request_t = ctypes.c_int
563
564
# Exceptions
565
class Error(Exception):
566
# We need to use the class name "GnuTLS" here, since this
567
# exception might be raised from within GnuTLS.__init__,
568
# which is called before the assignment to the "gnutls"
569
# global variable has happened.
570
def __init__(self, message=None, code=None, args=()):
571
# Default usage is by a message string, but if a return
572
# code is passed, convert it to a string with
573
# gnutls.strerror()
574
self.code = code
575
if message is None and code is not None:
576
message = GnuTLS.strerror(code)
577
return super(GnuTLS.Error, self).__init__(
578
message, *args)
579
580
class CertificateSecurityError(Error):
581
pass
582
583
# Classes
584
class Credentials(object):
585
def __init__(self):
586
self._c_object = gnutls.certificate_credentials_t()
587
gnutls.certificate_allocate_credentials(
588
ctypes.byref(self._c_object))
589
self.type = gnutls.CRD_CERTIFICATE
590
591
def __del__(self):
592
gnutls.certificate_free_credentials(self._c_object)
593
594
class ClientSession(object):
595
def __init__(self, socket, credentials=None):
596
self._c_object = gnutls.session_t()
597
gnutls.init(ctypes.byref(self._c_object), gnutls.CLIENT)
598
gnutls.set_default_priority(self._c_object)
599
gnutls.transport_set_ptr(self._c_object, socket.fileno())
600
gnutls.handshake_set_private_extensions(self._c_object,
601
True)
602
self.socket = socket
603
if credentials is None:
604
credentials = gnutls.Credentials()
605
gnutls.credentials_set(self._c_object, credentials.type,
606
ctypes.cast(credentials._c_object,
607
ctypes.c_void_p))
608
self.credentials = credentials
609
610
def __del__(self):
611
gnutls.deinit(self._c_object)
612
613
def handshake(self):
614
return gnutls.handshake(self._c_object)
615
616
def send(self, data):
617
data = bytes(data)
618
data_len = len(data)
619
while data_len > 0:
620
data_len -= gnutls.record_send(self._c_object,
621
data[-data_len:],
622
data_len)
623
624
def bye(self):
625
return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
626
627
# Error handling functions
628
def _error_code(result):
629
"""A function to raise exceptions on errors, suitable
630
for the 'restype' attribute on ctypes functions"""
631
if result >= 0:
632
return result
633
if result == gnutls.E_NO_CERTIFICATE_FOUND:
634
raise gnutls.CertificateSecurityError(code=result)
635
raise gnutls.Error(code=result)
636
637
def _retry_on_error(result, func, arguments):
638
"""A function to retry on some errors, suitable
639
for the 'errcheck' attribute on ctypes functions"""
640
while result < 0:
641
if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
642
return _error_code(result)
643
result = func(*arguments)
644
return result
645
646
# Unless otherwise indicated, the function declarations below are
647
# all from the gnutls/gnutls.h C header file.
648
649
# Functions
650
priority_set_direct = _library.gnutls_priority_set_direct
651
priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
652
ctypes.POINTER(ctypes.c_char_p)]
653
priority_set_direct.restype = _error_code
654
655
init = _library.gnutls_init
656
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
657
init.restype = _error_code
658
659
set_default_priority = _library.gnutls_set_default_priority
660
set_default_priority.argtypes = [session_t]
661
set_default_priority.restype = _error_code
662
663
record_send = _library.gnutls_record_send
664
record_send.argtypes = [session_t, ctypes.c_void_p,
665
ctypes.c_size_t]
666
record_send.restype = ctypes.c_ssize_t
667
record_send.errcheck = _retry_on_error
668
669
certificate_allocate_credentials = (
670
_library.gnutls_certificate_allocate_credentials)
671
certificate_allocate_credentials.argtypes = [
672
ctypes.POINTER(certificate_credentials_t)]
673
certificate_allocate_credentials.restype = _error_code
674
675
certificate_free_credentials = (
676
_library.gnutls_certificate_free_credentials)
677
certificate_free_credentials.argtypes = [
678
certificate_credentials_t]
679
certificate_free_credentials.restype = None
680
681
handshake_set_private_extensions = (
682
_library.gnutls_handshake_set_private_extensions)
683
handshake_set_private_extensions.argtypes = [session_t,
684
ctypes.c_int]
685
handshake_set_private_extensions.restype = None
686
687
credentials_set = _library.gnutls_credentials_set
688
credentials_set.argtypes = [session_t, credentials_type_t,
689
ctypes.c_void_p]
690
credentials_set.restype = _error_code
691
692
strerror = _library.gnutls_strerror
693
strerror.argtypes = [ctypes.c_int]
694
strerror.restype = ctypes.c_char_p
695
696
certificate_type_get = _library.gnutls_certificate_type_get
697
certificate_type_get.argtypes = [session_t]
698
certificate_type_get.restype = _error_code
699
700
certificate_get_peers = _library.gnutls_certificate_get_peers
701
certificate_get_peers.argtypes = [session_t,
702
ctypes.POINTER(ctypes.c_uint)]
703
certificate_get_peers.restype = ctypes.POINTER(datum_t)
704
705
global_set_log_level = _library.gnutls_global_set_log_level
706
global_set_log_level.argtypes = [ctypes.c_int]
707
global_set_log_level.restype = None
708
709
global_set_log_function = _library.gnutls_global_set_log_function
710
global_set_log_function.argtypes = [log_func]
711
global_set_log_function.restype = None
712
713
deinit = _library.gnutls_deinit
714
deinit.argtypes = [session_t]
715
deinit.restype = None
716
717
handshake = _library.gnutls_handshake
718
handshake.argtypes = [session_t]
719
handshake.restype = _error_code
720
handshake.errcheck = _retry_on_error
721
722
transport_set_ptr = _library.gnutls_transport_set_ptr
723
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
724
transport_set_ptr.restype = None
725
726
bye = _library.gnutls_bye
727
bye.argtypes = [session_t, close_request_t]
728
bye.restype = _error_code
729
bye.errcheck = _retry_on_error
730
731
check_version = _library.gnutls_check_version
732
check_version.argtypes = [ctypes.c_char_p]
733
check_version.restype = ctypes.c_char_p
734
735
# All the function declarations below are from gnutls/openpgp.h
736
737
openpgp_crt_init = _library.gnutls_openpgp_crt_init
738
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
739
openpgp_crt_init.restype = _error_code
740
741
openpgp_crt_import = _library.gnutls_openpgp_crt_import
742
openpgp_crt_import.argtypes = [openpgp_crt_t,
743
ctypes.POINTER(datum_t),
744
openpgp_crt_fmt_t]
745
openpgp_crt_import.restype = _error_code
746
747
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
748
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
749
ctypes.POINTER(ctypes.c_uint)]
750
openpgp_crt_verify_self.restype = _error_code
751
752
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
753
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
754
openpgp_crt_deinit.restype = None
755
756
openpgp_crt_get_fingerprint = (
757
_library.gnutls_openpgp_crt_get_fingerprint)
758
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
759
ctypes.c_void_p,
760
ctypes.POINTER(
761
ctypes.c_size_t)]
762
openpgp_crt_get_fingerprint.restype = _error_code
763
764
# Remove non-public functions
765
del _error_code, _retry_on_error
766
# Create the global "gnutls" object, simulating a module
767
gnutls = GnuTLS()
768
769
770
def call_pipe(connection, # : multiprocessing.Connection
771
func, *args, **kwargs):
772
"""This function is meant to be called by multiprocessing.Process
773
774
This function runs func(*args, **kwargs), and writes the resulting
775
return value on the provided multiprocessing.Connection.
776
"""
777
connection.send(func(*args, **kwargs))
778
connection.close()
779
780
273
781
class Client(object):
274
782
"""A representation of a client host served by this server.
275
783
276
784
Attributes:
277
_approved: bool(); 'None' if not yet approved/disapproved
785
approved: bool(); 'None' if not yet approved/disapproved
278
786
approval_delay: datetime.timedelta(); Time to wait for approval
279
787
approval_duration: datetime.timedelta(); Duration of one approval
280
788
checker: subprocess.Popen(); a running checker process used
281
789
to see if the client lives.
282
790
'None' if no process is running.
283
checker_callback_tag: a gobject event source tag, or None
791
checker_callback_tag: a GLib event source tag, or None
284
792
checker_command: string; External command which is run to check
285
793
if client lives. %() expansions are done at
286
794
runtime with vars(self) as dict, so that for
287
795
instance %(name)s can be used in the command.
288
checker_initiator_tag: a gobject event source tag, or None
796
checker_initiator_tag: a GLib event source tag, or None
289
797
created: datetime.datetime(); (UTC) object creation
798
client_structure: Object describing what attributes a client has
799
and is used for storing the client at exit
290
800
current_checker_command: string; current running checker_command
291
disable_hook: If set, called by disable() as disable_hook(self)
292
disable_initiator_tag: a gobject event source tag, or None
801
disable_initiator_tag: a GLib event source tag, or None
293
802
enabled: bool()
294
803
fingerprint: string (40 or 32 hexadecimal digits); used to
295
804
uniquely identify the client
297
806
interval: datetime.timedelta(); How often to start a new checker
298
807
last_approval_request: datetime.datetime(); (UTC) or None
299
808
last_checked_ok: datetime.datetime(); (UTC) or None
300
last_enabled: datetime.datetime(); (UTC)
809
last_checker_status: integer between 0 and 255 reflecting exit
810
status of last checker. -1 reflects crashed
811
checker, -2 means no checker completed yet.
812
last_checker_signal: The signal which killed the last checker, if
813
last_checker_status is -1
814
last_enabled: datetime.datetime(); (UTC) or None
301
815
name: string; from the config file, used in log messages and
302
816
D-Bus identifiers
303
817
secret: bytestring; sent verbatim (over TLS) to client
304
818
timeout: datetime.timedelta(); How long from last_checked_ok
305
819
until this client is disabled
306
extended_timeout: extra long timeout when password has been sent
820
extended_timeout: extra long timeout when secret has been sent
307
821
runtime_expansions: Allowed attributes for runtime expansion.
308
822
expires: datetime.datetime(); time (UTC) when a client will be
309
823
disabled, or None
824
server_settings: The server_settings dict from main()
310
825
"""
311
826
312
827
runtime_expansions = ("approval_delay", "approval_duration",
313
"created", "enabled", "fingerprint",
314
"host", "interval", "last_checked_ok",
828
"created", "enabled", "expires",
829
"fingerprint", "host", "interval",
830
"last_approval_request", "last_checked_ok",
315
831
"last_enabled", "name", "timeout")
316
317
def timeout_milliseconds(self):
318
"Return the 'timeout' attribute in milliseconds"
319
return _timedelta_to_milliseconds(self.timeout)
320
321
def extended_timeout_milliseconds(self):
322
"Return the 'extended_timeout' attribute in milliseconds"
323
return _timedelta_to_milliseconds(self.extended_timeout)
324
325
def interval_milliseconds(self):
326
"Return the 'interval' attribute in milliseconds"
327
return _timedelta_to_milliseconds(self.interval)
328
329
def approval_delay_milliseconds(self):
330
return _timedelta_to_milliseconds(self.approval_delay)
331
332
def __init__(self, name = None, disable_hook=None, config=None):
333
"""Note: the 'checker' key in 'config' sets the
334
'checker_command' attribute and *not* the 'checker'
335
attribute."""
832
client_defaults = {
833
"timeout": "PT5M",
834
"extended_timeout": "PT15M",
835
"interval": "PT2M",
836
"checker": "fping -q -- %%(host)s",
837
"host": "",
838
"approval_delay": "PT0S",
839
"approval_duration": "PT1S",
840
"approved_by_default": "True",
841
"enabled": "True",
842
}
843
844
@staticmethod
845
def config_parser(config):
846
"""Construct a new dict of client settings of this form:
847
{ client_name: {setting_name: value, ...}, ...}
848
with exceptions for any special settings as defined above.
849
NOTE: Must be a pure function. Must return the same result
850
value given the same arguments.
851
"""
852
settings = {}
853
for client_name in config.sections():
854
section = dict(config.items(client_name))
855
client = settings[client_name] = {}
856
857
client["host"] = section["host"]
858
# Reformat values from string types to Python types
859
client["approved_by_default"] = config.getboolean(
860
client_name, "approved_by_default")
861
client["enabled"] = config.getboolean(client_name,
862
"enabled")
863
864
# Uppercase and remove spaces from fingerprint for later
865
# comparison purposes with return value from the
866
# fingerprint() function
867
client["fingerprint"] = (section["fingerprint"].upper()
868
.replace(" ", ""))
869
if "secret" in section:
870
client["secret"] = codecs.decode(section["secret"]
871
.encode("utf-8"),
872
"base64")
873
elif "secfile" in section:
874
with open(os.path.expanduser(os.path.expandvars
875
(section["secfile"])),
876
"rb") as secfile:
877
client["secret"] = secfile.read()
878
else:
879
raise TypeError("No secret or secfile for section {}"
880
.format(section))
881
client["timeout"] = string_to_delta(section["timeout"])
882
client["extended_timeout"] = string_to_delta(
883
section["extended_timeout"])
884
client["interval"] = string_to_delta(section["interval"])
885
client["approval_delay"] = string_to_delta(
886
section["approval_delay"])
887
client["approval_duration"] = string_to_delta(
888
section["approval_duration"])
889
client["checker_command"] = section["checker"]
890
client["last_approval_request"] = None
891
client["last_checked_ok"] = None
892
client["last_checker_status"] = -2
893
894
return settings
895
896
def __init__(self, settings, name=None, server_settings=None):
336
897
self.name = name
337
if config is None:
338
config = {}
898
if server_settings is None:
899
server_settings = {}
900
self.server_settings = server_settings
901
# adding all client settings
902
for setting, value in settings.items():
903
setattr(self, setting, value)
904
905
if self.enabled:
906
if not hasattr(self, "last_enabled"):
907
self.last_enabled = datetime.datetime.utcnow()
908
if not hasattr(self, "expires"):
909
self.expires = (datetime.datetime.utcnow()
910
+ self.timeout)
911
else:
912
self.last_enabled = None
913
self.expires = None
914
339
915
logger.debug("Creating client %r", self.name)
340
# Uppercase and remove spaces from fingerprint for later
341
# comparison purposes with return value from the fingerprint()
342
# function
343
self.fingerprint = (config["fingerprint"].upper()
344
.replace(" ", ""))
345
916
logger.debug(" Fingerprint: %s", self.fingerprint)
346
if "secret" in config:
347
self.secret = config["secret"].decode("base64")
348
elif "secfile" in config:
349
with open(os.path.expanduser(os.path.expandvars
350
(config["secfile"])),
351
"rb") as secfile:
352
self.secret = secfile.read()
353
else:
354
raise TypeError("No secret or secfile for client %s"
355
% self.name)
356
self.host = config.get("host", "")
357
self.created = datetime.datetime.utcnow()
358
self.enabled = False
359
self.last_approval_request = None
360
self.last_enabled = None
361
self.last_checked_ok = None
362
self.timeout = string_to_delta(config["timeout"])
363
self.extended_timeout = string_to_delta(config["extended_timeout"])
364
self.interval = string_to_delta(config["interval"])
365
self.disable_hook = disable_hook
917
self.created = settings.get("created",
918
datetime.datetime.utcnow())
919
920
# attributes specific for this server instance
366
921
self.checker = None
367
922
self.checker_initiator_tag = None
368
923
self.disable_initiator_tag = None
369
self.expires = None
370
924
self.checker_callback_tag = None
371
self.checker_command = config["checker"]
372
925
self.current_checker_command = None
373
self.last_connect = None
374
self._approved = None
375
self.approved_by_default = config.get("approved_by_default",
376
True)
926
self.approved = None
377
927
self.approvals_pending = 0
378
self.approval_delay = string_to_delta(
379
config["approval_delay"])
380
self.approval_duration = string_to_delta(
381
config["approval_duration"])
382
self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())
383
928
self.changedstate = multiprocessing_manager.Condition(
929
multiprocessing_manager.Lock())
930
self.client_structure = [attr
931
for attr in self.__dict__.keys()
932
if not attr.startswith("_")]
933
self.client_structure.append("client_structure")
934
935
for name, t in inspect.getmembers(
936
type(self), lambda obj: isinstance(obj, property)):
937
if not name.startswith("_"):
938
self.client_structure.append(name)
939
940
# Send notice to process children that client state has changed
384
941
def send_changedstate(self):
385
self.changedstate.acquire()
386
self.changedstate.notify_all()
387
self.changedstate.release()
388
942
with self.changedstate:
943
self.changedstate.notify_all()
944
389
945
def enable(self):
390
946
"""Start this client's checker and timeout hooks"""
391
947
if getattr(self, "enabled", False):
392
948
# Already enabled
393
949
return
394
self.send_changedstate()
395
# Schedule a new checker to be started an 'interval' from now,
396
# and every interval from then on.
397
self.checker_initiator_tag = (gobject.timeout_add
398
(self.interval_milliseconds(),
399
self.start_checker))
400
# Schedule a disable() when 'timeout' has passed
401
950
self.expires = datetime.datetime.utcnow() + self.timeout
402
self.disable_initiator_tag = (gobject.timeout_add
403
(self.timeout_milliseconds(),
404
self.disable))
405
951
self.enabled = True
406
952
self.last_enabled = datetime.datetime.utcnow()
407
# Also start a new checker *right now*.
408
self.start_checker()
409
953
self.init_checker()
954
self.send_changedstate()
955
410
956
def disable(self, quiet=True):
411
957
"""Disable this client."""
412
958
if not getattr(self, "enabled", False):
413
959
return False
414
960
if not quiet:
415
self.send_changedstate()
416
if not quiet:
417
961
logger.info("Disabling client %s", self.name)
418
if getattr(self, "disable_initiator_tag", False):
419
gobject.source_remove(self.disable_initiator_tag)
962
if getattr(self, "disable_initiator_tag", None) is not None:
963
GLib.source_remove(self.disable_initiator_tag)
420
964
self.disable_initiator_tag = None
421
965
self.expires = None
422
if getattr(self, "checker_initiator_tag", False):
423
gobject.source_remove(self.checker_initiator_tag)
966
if getattr(self, "checker_initiator_tag", None) is not None:
967
GLib.source_remove(self.checker_initiator_tag)
424
968
self.checker_initiator_tag = None
425
969
self.stop_checker()
426
if self.disable_hook:
427
self.disable_hook(self)
428
970
self.enabled = False
429
# Do not run this again if called by a gobject.timeout_add
971
if not quiet:
972
self.send_changedstate()
973
# Do not run this again if called by a GLib.timeout_add
430
974
return False
431
975
432
976
def __del__(self):
433
self.disable_hook = None
434
977
self.disable()
435
436
def checker_callback(self, pid, condition, command):
978
979
def init_checker(self):
980
# Schedule a new checker to be started an 'interval' from now,
981
# and every interval from then on.
982
if self.checker_initiator_tag is not None:
983
GLib.source_remove(self.checker_initiator_tag)
984
self.checker_initiator_tag = GLib.timeout_add(
985
int(self.interval.total_seconds() * 1000),
986
self.start_checker)
987
# Schedule a disable() when 'timeout' has passed
988
if self.disable_initiator_tag is not None:
989
GLib.source_remove(self.disable_initiator_tag)
990
self.disable_initiator_tag = GLib.timeout_add(
991
int(self.timeout.total_seconds() * 1000), self.disable)
992
# Also start a new checker *right now*.
993
self.start_checker()
994
995
def checker_callback(self, source, condition, connection,
996
command):
437
997
"""The checker has completed, so take appropriate actions."""
438
998
self.checker_callback_tag = None
439
999
self.checker = None
440
if os.WIFEXITED(condition):
441
exitstatus = os.WEXITSTATUS(condition)
442
if exitstatus == 0:
1000
# Read return code from connection (see call_pipe)
1001
returncode = connection.recv()
1002
connection.close()
1003
1004
if returncode >= 0:
1005
self.last_checker_status = returncode
1006
self.last_checker_signal = None
1007
if self.last_checker_status == 0:
443
1008
logger.info("Checker for %(name)s succeeded",
444
1009
vars(self))
445
1010
self.checked_ok()
446
1011
else:
447
logger.info("Checker for %(name)s failed",
448
vars(self))
1012
logger.info("Checker for %(name)s failed", vars(self))
449
1013
else:
1014
self.last_checker_status = -1
1015
self.last_checker_signal = -returncode
450
1016
logger.warning("Checker for %(name)s crashed?",
451
1017
vars(self))
452
453
def checked_ok(self, timeout=None):
454
"""Bump up the timeout for this client.
455
456
This should only be called when the client has been seen,
457
alive and well.
458
"""
1018
return False
1019
1020
def checked_ok(self):
1021
"""Assert that the client has been seen, alive and well."""
1022
self.last_checked_ok = datetime.datetime.utcnow()
1023
self.last_checker_status = 0
1024
self.last_checker_signal = None
1025
self.bump_timeout()
1026
1027
def bump_timeout(self, timeout=None):
1028
"""Bump up the timeout for this client."""
459
1029
if timeout is None:
460
1030
timeout = self.timeout
461
self.last_checked_ok = datetime.datetime.utcnow()
462
gobject.source_remove(self.disable_initiator_tag)
463
self.expires = datetime.datetime.utcnow() + timeout
464
self.disable_initiator_tag = (gobject.timeout_add
465
(_timedelta_to_milliseconds(timeout),
466
self.disable))
467
1031
if self.disable_initiator_tag is not None:
1032
GLib.source_remove(self.disable_initiator_tag)
1033
self.disable_initiator_tag = None
1034
if getattr(self, "enabled", False):
1035
self.disable_initiator_tag = GLib.timeout_add(
1036
int(timeout.total_seconds() * 1000), self.disable)
1037
self.expires = datetime.datetime.utcnow() + timeout
1038
468
1039
def need_approval(self):
469
1040
self.last_approval_request = datetime.datetime.utcnow()
470
1041
471
1042
def start_checker(self):
472
1043
"""Start a new checker subprocess if one is not running.
473
1044
474
1045
If a checker already exists, leave it running and do
475
1046
nothing."""
476
1047
# The reason for not killing a running checker is that if we
477
# did that, then if a checker (for some reason) started
478
# running slowly and taking more than 'interval' time, the
479
# client would inevitably timeout, since no checker would get
480
# a chance to run to completion. If we instead leave running
1048
# did that, and if a checker (for some reason) started running
1049
# slowly and taking more than 'interval' time, then the client
1050
# would inevitably timeout, since no checker would get a
1051
# chance to run to completion. If we instead leave running
481
1052
# checkers alone, the checker would have to take more time
482
1053
# than 'timeout' for the client to be disabled, which is as it
483
1054
# should be.
484
485
# If a checker exists, make sure it is not a zombie
486
try:
487
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
488
except (AttributeError, OSError) as error:
489
if (isinstance(error, OSError)
490
and error.errno != errno.ECHILD):
491
raise error
492
else:
493
if pid:
494
logger.warning("Checker was a zombie")
495
gobject.source_remove(self.checker_callback_tag)
496
self.checker_callback(pid, status,
497
self.current_checker_command)
1055
1056
if self.checker is not None and not self.checker.is_alive():
1057
logger.warning("Checker was not alive; joining")
1058
self.checker.join()
1059
self.checker = None
498
1060
# Start a new checker if needed
499
1061
if self.checker is None:
1062
# Escape attributes for the shell
1063
escaped_attrs = {
1064
attr: re.escape(str(getattr(self, attr)))
1065
for attr in self.runtime_expansions}
500
1066
try:
501
# In case checker_command has exactly one % operator
502
command = self.checker_command % self.host
503
except TypeError:
504
# Escape attributes for the shell
505
escaped_attrs = dict(
506
(attr,
507
re.escape(unicode(str(getattr(self, attr, "")),
508
errors=
509
'replace')))
510
for attr in
511
self.runtime_expansions)
512
513
try:
514
command = self.checker_command % escaped_attrs
515
except TypeError as error:
516
logger.error('Could not format string "%s":'
517
' %s', self.checker_command, error)
518
return True # Try again later
1067
command = self.checker_command % escaped_attrs
1068
except TypeError as error:
1069
logger.error('Could not format string "%s"',
1070
self.checker_command,
1071
exc_info=error)
1072
return True # Try again later
519
1073
self.current_checker_command = command
520
try:
521
logger.info("Starting checker %r for %s",
522
command, self.name)
523
# We don't need to redirect stdout and stderr, since
524
# in normal mode, that is already done by daemon(),
525
# and in debug mode we don't want to. (Stdin is
526
# always replaced by /dev/null.)
527
self.checker = subprocess.Popen(command,
528
close_fds=True,
529
shell=True, cwd="/")
530
self.checker_callback_tag = (gobject.child_watch_add
531
(self.checker.pid,
532
self.checker_callback,
533
data=command))
534
# The checker may have completed before the gobject
535
# watch was added. Check for this.
536
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
537
if pid:
538
gobject.source_remove(self.checker_callback_tag)
539
self.checker_callback(pid, status, command)
540
except OSError as error:
541
logger.error("Failed to start subprocess: %s",
542
error)
543
# Re-run this periodically if run by gobject.timeout_add
1074
logger.info("Starting checker %r for %s", command,
1075
self.name)
1076
# We don't need to redirect stdout and stderr, since
1077
# in normal mode, that is already done by daemon(),
1078
# and in debug mode we don't want to. (Stdin is
1079
# always replaced by /dev/null.)
1080
# The exception is when not debugging but nevertheless
1081
# running in the foreground; use the previously
1082
# created wnull.
1083
popen_args = {"close_fds": True,
1084
"shell": True,
1085
"cwd": "/"}
1086
if (not self.server_settings["debug"]
1087
and self.server_settings["foreground"]):
1088
popen_args.update({"stdout": wnull,
1089
"stderr": wnull})
1090
pipe = multiprocessing.Pipe(duplex=False)
1091
self.checker = multiprocessing.Process(
1092
target=call_pipe,
1093
args=(pipe[1], subprocess.call, command),
1094
kwargs=popen_args)
1095
self.checker.start()
1096
self.checker_callback_tag = GLib.io_add_watch(
1097
pipe[0].fileno(), GLib.IO_IN,
1098
self.checker_callback, pipe[0], command)
1099
# Re-run this periodically if run by GLib.timeout_add
544
1100
return True
545
1101
546
1102
def stop_checker(self):
547
1103
"""Force the checker process, if any, to stop."""
548
1104
if self.checker_callback_tag:
549
gobject.source_remove(self.checker_callback_tag)
1105
GLib.source_remove(self.checker_callback_tag)
550
1106
self.checker_callback_tag = None
551
1107
if getattr(self, "checker", None) is None:
552
1108
return
553
1109
logger.debug("Stopping checker for %(name)s", vars(self))
554
try:
555
os.kill(self.checker.pid, signal.SIGTERM)
556
#time.sleep(0.5)
557
#if self.checker.poll() is None:
558
# os.kill(self.checker.pid, signal.SIGKILL)
559
except OSError as error:
560
if error.errno != errno.ESRCH: # No such process
561
raise
1110
self.checker.terminate()
562
1111
self.checker = None
563
1112
564
1113
565
def dbus_service_property(dbus_interface, signature="v",
566
access="readwrite", byte_arrays=False):
1114
def dbus_service_property(dbus_interface,
1115
signature="v",
1116
access="readwrite",
1117
byte_arrays=False):
567
1118
"""Decorators for marking methods of a DBusObjectWithProperties to
568
1119
become properties on the D-Bus.
569
1120
570
1121
The decorated method will be called with no arguments by "Get"
571
1122
and with one argument by "Set".
572
1123
573
1124
The parameters, where they are supported, are the same as
574
1125
dbus.service.method, except there is only "signature", since the
575
1126
type from Get() and the type sent to Set() is the same.
578
1129
# "Set" method, so we fail early here:
579
1130
if byte_arrays and signature != "ay":
580
1131
raise ValueError("Byte arrays not supported for non-'ay'"
581
" signature %r" % signature)
1132
" signature {!r}".format(signature))
1133
582
1134
def decorator(func):
583
1135
func._dbus_is_property = True
584
1136
func._dbus_interface = dbus_interface
587
1139
func._dbus_name = func.__name__
588
1140
if func._dbus_name.endswith("_dbus_property"):
589
1141
func._dbus_name = func._dbus_name[:-14]
590
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
591
return func
1142
func._dbus_get_args_options = {'byte_arrays': byte_arrays}
1143
return func
1144
1145
return decorator
1146
1147
1148
def dbus_interface_annotations(dbus_interface):
1149
"""Decorator for marking functions returning interface annotations
1150
1151
Usage:
1152
1153
@dbus_interface_annotations("org.example.Interface")
1154
def _foo(self): # Function name does not matter
1155
return {"org.freedesktop.DBus.Deprecated": "true",
1156
"org.freedesktop.DBus.Property.EmitsChangedSignal":
1157
"false"}
1158
"""
1159
1160
def decorator(func):
1161
func._dbus_is_interface = True
1162
func._dbus_interface = dbus_interface
1163
func._dbus_name = dbus_interface
1164
return func
1165
1166
return decorator
1167
1168
1169
def dbus_annotations(annotations):
1170
"""Decorator to annotate D-Bus methods, signals or properties
1171
Usage:
1172
1173
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
1174
"org.freedesktop.DBus.Property."
1175
"EmitsChangedSignal": "false"})
1176
@dbus_service_property("org.example.Interface", signature="b",
1177
access="r")
1178
def Property_dbus_property(self):
1179
return dbus.Boolean(False)
1180
1181
See also the DBusObjectWithAnnotations class.
1182
"""
1183
1184
def decorator(func):
1185
func._dbus_annotations = annotations
1186
return func
1187
592
1188
return decorator
593
1189
594
1190
595
1191
class DBusPropertyException(dbus.exceptions.DBusException):
596
1192
"""A base class for D-Bus property-related exceptions
597
1193
"""
598
def __unicode__(self):
599
return unicode(str(self))
1194
pass
600
1195
601
1196
602
1197
class DBusPropertyAccessException(DBusPropertyException):
611
1206
pass
612
1207
613
1208
614
class DBusObjectWithProperties(dbus.service.Object):
1209
class DBusObjectWithAnnotations(dbus.service.Object):
1210
"""A D-Bus object with annotations.
1211
1212
Classes inheriting from this can use the dbus_annotations
1213
decorator to add annotations to methods or signals.
1214
"""
1215
1216
@staticmethod
1217
def _is_dbus_thing(thing):
1218
"""Returns a function testing if an attribute is a D-Bus thing
1219
1220
If called like _is_dbus_thing("method") it returns a function
1221
suitable for use as predicate to inspect.getmembers().
1222
"""
1223
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
1224
False)
1225
1226
def _get_all_dbus_things(self, thing):
1227
"""Returns a generator of (name, attribute) pairs
1228
"""
1229
return ((getattr(athing.__get__(self), "_dbus_name", name),
1230
athing.__get__(self))
1231
for cls in self.__class__.__mro__
1232
for name, athing in
1233
inspect.getmembers(cls, self._is_dbus_thing(thing)))
1234
1235
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1236
out_signature="s",
1237
path_keyword='object_path',
1238
connection_keyword='connection')
1239
def Introspect(self, object_path, connection):
1240
"""Overloading of standard D-Bus method.
1241
1242
Inserts annotation tags on methods and signals.
1243
"""
1244
xmlstring = dbus.service.Object.Introspect(self, object_path,
1245
connection)
1246
try:
1247
document = xml.dom.minidom.parseString(xmlstring)
1248
1249
for if_tag in document.getElementsByTagName("interface"):
1250
# Add annotation tags
1251
for typ in ("method", "signal"):
1252
for tag in if_tag.getElementsByTagName(typ):
1253
annots = dict()
1254
for name, prop in (self.
1255
_get_all_dbus_things(typ)):
1256
if (name == tag.getAttribute("name")
1257
and prop._dbus_interface
1258
== if_tag.getAttribute("name")):
1259
annots.update(getattr(
1260
prop, "_dbus_annotations", {}))
1261
for name, value in annots.items():
1262
ann_tag = document.createElement(
1263
"annotation")
1264
ann_tag.setAttribute("name", name)
1265
ann_tag.setAttribute("value", value)
1266
tag.appendChild(ann_tag)
1267
# Add interface annotation tags
1268
for annotation, value in dict(
1269
itertools.chain.from_iterable(
1270
annotations().items()
1271
for name, annotations
1272
in self._get_all_dbus_things("interface")
1273
if name == if_tag.getAttribute("name")
1274
)).items():
1275
ann_tag = document.createElement("annotation")
1276
ann_tag.setAttribute("name", annotation)
1277
ann_tag.setAttribute("value", value)
1278
if_tag.appendChild(ann_tag)
1279
# Fix argument name for the Introspect method itself
1280
if (if_tag.getAttribute("name")
1281
== dbus.INTROSPECTABLE_IFACE):
1282
for cn in if_tag.getElementsByTagName("method"):
1283
if cn.getAttribute("name") == "Introspect":
1284
for arg in cn.getElementsByTagName("arg"):
1285
if (arg.getAttribute("direction")
1286
== "out"):
1287
arg.setAttribute("name",
1288
"xml_data")
1289
xmlstring = document.toxml("utf-8")
1290
document.unlink()
1291
except (AttributeError, xml.dom.DOMException,
1292
xml.parsers.expat.ExpatError) as error:
1293
logger.error("Failed to override Introspection method",
1294
exc_info=error)
1295
return xmlstring
1296
1297
1298
class DBusObjectWithProperties(DBusObjectWithAnnotations):
615
1299
"""A D-Bus object with properties.
616
1300
617
1301
Classes inheriting from this can use the dbus_service_property
618
1302
decorator to expose methods as D-Bus properties. It exposes the
619
1303
standard Get(), Set(), and GetAll() methods on the D-Bus.
620
1304
"""
621
622
@staticmethod
623
def _is_dbus_property(obj):
624
return getattr(obj, "_dbus_is_property", False)
625
626
def _get_all_dbus_properties(self):
627
"""Returns a generator of (name, attribute) pairs
628
"""
629
return ((prop._dbus_name, prop)
630
for name, prop in
631
inspect.getmembers(self, self._is_dbus_property))
632
1305
633
1306
def _get_dbus_property(self, interface_name, property_name):
634
1307
"""Returns a bound method if one exists which is a D-Bus
635
1308
property with the specified name and interface.
636
1309
"""
637
for name in (property_name,
638
property_name + "_dbus_property"):
639
prop = getattr(self, name, None)
640
if (prop is None
641
or not self._is_dbus_property(prop)
642
or prop._dbus_name != property_name
643
or (interface_name and prop._dbus_interface
644
and interface_name != prop._dbus_interface)):
645
continue
646
return prop
1310
for cls in self.__class__.__mro__:
1311
for name, value in inspect.getmembers(
1312
cls, self._is_dbus_thing("property")):
1313
if (value._dbus_name == property_name
1314
and value._dbus_interface == interface_name):
1315
return value.__get__(self)
1316
647
1317
# No such property
648
raise DBusPropertyNotFound(self.dbus_object_path + ":"
649
+ interface_name + "."
650
+ property_name)
651
652
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
1318
raise DBusPropertyNotFound("{}:{}.{}".format(
1319
self.dbus_object_path, interface_name, property_name))
1320
1321
@classmethod
1322
def _get_all_interface_names(cls):
1323
"""Get a sequence of all interfaces supported by an object"""
1324
return (name for name in set(getattr(getattr(x, attr),
1325
"_dbus_interface", None)
1326
for x in (inspect.getmro(cls))
1327
for attr in dir(x))
1328
if name is not None)
1329
1330
@dbus.service.method(dbus.PROPERTIES_IFACE,
1331
in_signature="ss",
653
1332
out_signature="v")
654
1333
def Get(self, interface_name, property_name):
655
1334
"""Standard D-Bus property Get() method, see D-Bus standard.
661
1340
if not hasattr(value, "variant_level"):
662
1341
return value
663
1342
return type(value)(value, variant_level=value.variant_level+1)
664
1343
665
1344
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
666
1345
def Set(self, interface_name, property_name, value):
667
1346
"""Standard D-Bus property Set() method, see D-Bus standard.
673
1352
# The byte_arrays option is not supported yet on
674
1353
# signatures other than "ay".
675
1354
if prop._dbus_signature != "ay":
676
raise ValueError
677
value = dbus.ByteArray(''.join(unichr(byte)
678
for byte in value))
1355
raise ValueError("Byte arrays not supported for non-"
1356
"'ay' signature {!r}"
1357
.format(prop._dbus_signature))
1358
value = dbus.ByteArray(b''.join(chr(byte)
1359
for byte in value))
679
1360
prop(value)
680
681
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
1361
1362
@dbus.service.method(dbus.PROPERTIES_IFACE,
1363
in_signature="s",
682
1364
out_signature="a{sv}")
683
1365
def GetAll(self, interface_name):
684
1366
"""Standard D-Bus property GetAll() method, see D-Bus
685
1367
standard.
686
1368
687
1369
Note: Will not include properties with access="write".
688
1370
"""
689
all = {}
690
for name, prop in self._get_all_dbus_properties():
1371
properties = {}
1372
for name, prop in self._get_all_dbus_things("property"):
691
1373
if (interface_name
692
1374
and interface_name != prop._dbus_interface):
693
1375
# Interface non-empty but did not match
697
1379
continue
698
1380
value = prop()
699
1381
if not hasattr(value, "variant_level"):
700
all[name] = value
1382
properties[name] = value
701
1383
continue
702
all[name] = type(value)(value, variant_level=
703
value.variant_level+1)
704
return dbus.Dictionary(all, signature="sv")
705
1384
properties[name] = type(value)(
1385
value, variant_level=value.variant_level + 1)
1386
return dbus.Dictionary(properties, signature="sv")
1387
1388
@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
1389
def PropertiesChanged(self, interface_name, changed_properties,
1390
invalidated_properties):
1391
"""Standard D-Bus PropertiesChanged() signal, see D-Bus
1392
standard.
1393
"""
1394
pass
1395
706
1396
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
707
1397
out_signature="s",
708
1398
path_keyword='object_path',
709
1399
connection_keyword='connection')
710
1400
def Introspect(self, object_path, connection):
711
"""Standard D-Bus method, overloaded to insert property tags.
1401
"""Overloading of standard D-Bus method.
1402
1403
Inserts property tags and interface annotation tags.
712
1404
"""
713
xmlstring = dbus.service.Object.Introspect(self, object_path,
714
connection)
1405
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1406
object_path,
1407
connection)
715
1408
try:
716
1409
document = xml.dom.minidom.parseString(xmlstring)
1410
717
1411
def make_tag(document, name, prop):
718
1412
e = document.createElement("property")
719
1413
e.setAttribute("name", name)
720
1414
e.setAttribute("type", prop._dbus_signature)
721
1415
e.setAttribute("access", prop._dbus_access)
722
1416
return e
1417
723
1418
for if_tag in document.getElementsByTagName("interface"):
1419
# Add property tags
724
1420
for tag in (make_tag(document, name, prop)
725
1421
for name, prop
726
in self._get_all_dbus_properties()
1422
in self._get_all_dbus_things("property")
727
1423
if prop._dbus_interface
728
1424
== if_tag.getAttribute("name")):
729
1425
if_tag.appendChild(tag)
1426
# Add annotation tags for properties
1427
for tag in if_tag.getElementsByTagName("property"):
1428
annots = dict()
1429
for name, prop in self._get_all_dbus_things(
1430
"property"):
1431
if (name == tag.getAttribute("name")
1432
and prop._dbus_interface
1433
== if_tag.getAttribute("name")):
1434
annots.update(getattr(
1435
prop, "_dbus_annotations", {}))
1436
for name, value in annots.items():
1437
ann_tag = document.createElement(
1438
"annotation")
1439
ann_tag.setAttribute("name", name)
1440
ann_tag.setAttribute("value", value)
1441
tag.appendChild(ann_tag)
730
1442
# Add the names to the return values for the
731
1443
# "org.freedesktop.DBus.Properties" methods
732
1444
if (if_tag.getAttribute("name")
747
1459
except (AttributeError, xml.dom.DOMException,
748
1460
xml.parsers.expat.ExpatError) as error:
749
1461
logger.error("Failed to override Introspection method",
750
error)
751
return xmlstring
752
753
754
def datetime_to_dbus (dt, variant_level=0):
1462
exc_info=error)
1463
return xmlstring
1464
1465
1466
try:
1467
dbus.OBJECT_MANAGER_IFACE
1468
except AttributeError:
1469
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1470
1471
1472
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1473
"""A D-Bus object with an ObjectManager.
1474
1475
Classes inheriting from this exposes the standard
1476
GetManagedObjects call and the InterfacesAdded and
1477
InterfacesRemoved signals on the standard
1478
"org.freedesktop.DBus.ObjectManager" interface.
1479
1480
Note: No signals are sent automatically; they must be sent
1481
manually.
1482
"""
1483
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1484
out_signature="a{oa{sa{sv}}}")
1485
def GetManagedObjects(self):
1486
"""This function must be overridden"""
1487
raise NotImplementedError()
1488
1489
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1490
signature="oa{sa{sv}}")
1491
def InterfacesAdded(self, object_path, interfaces_and_properties):
1492
pass
1493
1494
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1495
def InterfacesRemoved(self, object_path, interfaces):
1496
pass
1497
1498
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1499
out_signature="s",
1500
path_keyword='object_path',
1501
connection_keyword='connection')
1502
def Introspect(self, object_path, connection):
1503
"""Overloading of standard D-Bus method.
1504
1505
Override return argument name of GetManagedObjects to be
1506
"objpath_interfaces_and_properties"
1507
"""
1508
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1509
object_path,
1510
connection)
1511
try:
1512
document = xml.dom.minidom.parseString(xmlstring)
1513
1514
for if_tag in document.getElementsByTagName("interface"):
1515
# Fix argument name for the GetManagedObjects method
1516
if (if_tag.getAttribute("name")
1517
== dbus.OBJECT_MANAGER_IFACE):
1518
for cn in if_tag.getElementsByTagName("method"):
1519
if (cn.getAttribute("name")
1520
== "GetManagedObjects"):
1521
for arg in cn.getElementsByTagName("arg"):
1522
if (arg.getAttribute("direction")
1523
== "out"):
1524
arg.setAttribute(
1525
"name",
1526
"objpath_interfaces"
1527
"_and_properties")
1528
xmlstring = document.toxml("utf-8")
1529
document.unlink()
1530
except (AttributeError, xml.dom.DOMException,
1531
xml.parsers.expat.ExpatError) as error:
1532
logger.error("Failed to override Introspection method",
1533
exc_info=error)
1534
return xmlstring
1535
1536
1537
def datetime_to_dbus(dt, variant_level=0):
755
1538
"""Convert a UTC datetime.datetime() to a D-Bus type."""
756
1539
if dt is None:
757
return dbus.String("", variant_level = variant_level)
758
return dbus.String(dt.isoformat(),
759
variant_level=variant_level)
760
761
1540
return dbus.String("", variant_level=variant_level)
1541
return dbus.String(dt.isoformat(), variant_level=variant_level)
1542
1543
1544
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1545
"""A class decorator; applied to a subclass of
1546
dbus.service.Object, it will add alternate D-Bus attributes with
1547
interface names according to the "alt_interface_names" mapping.
1548
Usage:
1549
1550
@alternate_dbus_interfaces({"org.example.Interface":
1551
"net.example.AlternateInterface"})
1552
class SampleDBusObject(dbus.service.Object):
1553
@dbus.service.method("org.example.Interface")
1554
def SampleDBusMethod():
1555
pass
1556
1557
The above "SampleDBusMethod" on "SampleDBusObject" will be
1558
reachable via two interfaces: "org.example.Interface" and
1559
"net.example.AlternateInterface", the latter of which will have
1560
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1561
"true", unless "deprecate" is passed with a False value.
1562
1563
This works for methods and signals, and also for D-Bus properties
1564
(from DBusObjectWithProperties) and interfaces (from the
1565
dbus_interface_annotations decorator).
1566
"""
1567
1568
def wrapper(cls):
1569
for orig_interface_name, alt_interface_name in (
1570
alt_interface_names.items()):
1571
attr = {}
1572
interface_names = set()
1573
# Go though all attributes of the class
1574
for attrname, attribute in inspect.getmembers(cls):
1575
# Ignore non-D-Bus attributes, and D-Bus attributes
1576
# with the wrong interface name
1577
if (not hasattr(attribute, "_dbus_interface")
1578
or not attribute._dbus_interface.startswith(
1579
orig_interface_name)):
1580
continue
1581
# Create an alternate D-Bus interface name based on
1582
# the current name
1583
alt_interface = attribute._dbus_interface.replace(
1584
orig_interface_name, alt_interface_name)
1585
interface_names.add(alt_interface)
1586
# Is this a D-Bus signal?
1587
if getattr(attribute, "_dbus_is_signal", False):
1588
# Extract the original non-method undecorated
1589
# function by black magic
1590
if sys.version_info.major == 2:
1591
nonmethod_func = (dict(
1592
zip(attribute.func_code.co_freevars,
1593
attribute.__closure__))
1594
["func"].cell_contents)
1595
else:
1596
nonmethod_func = (dict(
1597
zip(attribute.__code__.co_freevars,
1598
attribute.__closure__))
1599
["func"].cell_contents)
1600
# Create a new, but exactly alike, function
1601
# object, and decorate it to be a new D-Bus signal
1602
# with the alternate D-Bus interface name
1603
new_function = copy_function(nonmethod_func)
1604
new_function = (dbus.service.signal(
1605
alt_interface,
1606
attribute._dbus_signature)(new_function))
1607
# Copy annotations, if any
1608
try:
1609
new_function._dbus_annotations = dict(
1610
attribute._dbus_annotations)
1611
except AttributeError:
1612
pass
1613
1614
# Define a creator of a function to call both the
1615
# original and alternate functions, so both the
1616
# original and alternate signals gets sent when
1617
# the function is called
1618
def fixscope(func1, func2):
1619
"""This function is a scope container to pass
1620
func1 and func2 to the "call_both" function
1621
outside of its arguments"""
1622
1623
@functools.wraps(func2)
1624
def call_both(*args, **kwargs):
1625
"""This function will emit two D-Bus
1626
signals by calling func1 and func2"""
1627
func1(*args, **kwargs)
1628
func2(*args, **kwargs)
1629
# Make wrapper function look like a D-Bus
1630
# signal
1631
for name, attr in inspect.getmembers(func2):
1632
if name.startswith("_dbus_"):
1633
setattr(call_both, name, attr)
1634
1635
return call_both
1636
# Create the "call_both" function and add it to
1637
# the class
1638
attr[attrname] = fixscope(attribute, new_function)
1639
# Is this a D-Bus method?
1640
elif getattr(attribute, "_dbus_is_method", False):
1641
# Create a new, but exactly alike, function
1642
# object. Decorate it to be a new D-Bus method
1643
# with the alternate D-Bus interface name. Add it
1644
# to the class.
1645
attr[attrname] = (
1646
dbus.service.method(
1647
alt_interface,
1648
attribute._dbus_in_signature,
1649
attribute._dbus_out_signature)
1650
(copy_function(attribute)))
1651
# Copy annotations, if any
1652
try:
1653
attr[attrname]._dbus_annotations = dict(
1654
attribute._dbus_annotations)
1655
except AttributeError:
1656
pass
1657
# Is this a D-Bus property?
1658
elif getattr(attribute, "_dbus_is_property", False):
1659
# Create a new, but exactly alike, function
1660
# object, and decorate it to be a new D-Bus
1661
# property with the alternate D-Bus interface
1662
# name. Add it to the class.
1663
attr[attrname] = (dbus_service_property(
1664
alt_interface, attribute._dbus_signature,
1665
attribute._dbus_access,
1666
attribute._dbus_get_args_options
1667
["byte_arrays"])
1668
(copy_function(attribute)))
1669
# Copy annotations, if any
1670
try:
1671
attr[attrname]._dbus_annotations = dict(
1672
attribute._dbus_annotations)
1673
except AttributeError:
1674
pass
1675
# Is this a D-Bus interface?
1676
elif getattr(attribute, "_dbus_is_interface", False):
1677
# Create a new, but exactly alike, function
1678
# object. Decorate it to be a new D-Bus interface
1679
# with the alternate D-Bus interface name. Add it
1680
# to the class.
1681
attr[attrname] = (
1682
dbus_interface_annotations(alt_interface)
1683
(copy_function(attribute)))
1684
if deprecate:
1685
# Deprecate all alternate interfaces
1686
iname = "_AlternateDBusNames_interface_annotation{}"
1687
for interface_name in interface_names:
1688
1689
@dbus_interface_annotations(interface_name)
1690
def func(self):
1691
return {"org.freedesktop.DBus.Deprecated":
1692
"true"}
1693
# Find an unused name
1694
for aname in (iname.format(i)
1695
for i in itertools.count()):
1696
if aname not in attr:
1697
attr[aname] = func
1698
break
1699
if interface_names:
1700
# Replace the class with a new subclass of it with
1701
# methods, signals, etc. as created above.
1702
if sys.version_info.major == 2:
1703
cls = type(b"{}Alternate".format(cls.__name__),
1704
(cls, ), attr)
1705
else:
1706
cls = type("{}Alternate".format(cls.__name__),
1707
(cls, ), attr)
1708
return cls
1709
1710
return wrapper
1711
1712
1713
@alternate_dbus_interfaces({"se.recompile.Mandos":
1714
"se.bsnet.fukt.Mandos"})
762
1715
class ClientDBus(Client, DBusObjectWithProperties):
763
1716
"""A Client class using D-Bus
764
1717
765
1718
Attributes:
766
1719
dbus_object_path: dbus.ObjectPath
767
1720
bus: dbus.SystemBus()
768
1721
"""
769
1722
770
1723
runtime_expansions = (Client.runtime_expansions
771
+ ("dbus_object_path",))
772
1724
+ ("dbus_object_path", ))
1725
1726
_interface = "se.recompile.Mandos.Client"
1727
773
1728
# dbus.service.Object doesn't use super(), so we can't either.
774
775
def __init__(self, bus = None, *args, **kwargs):
776
self._approvals_pending = 0
1729
1730
def __init__(self, bus=None, *args, **kwargs):
777
1731
self.bus = bus
778
1732
Client.__init__(self, *args, **kwargs)
779
1733
# Only now, when this client is initialized, can it show up on
780
1734
# the D-Bus
781
client_object_name = unicode(self.name).translate(
1735
client_object_name = str(self.name).translate(
782
1736
{ord("."): ord("_"),
783
1737
ord("-"): ord("_")})
784
self.dbus_object_path = (dbus.ObjectPath
785
("/clients/" + client_object_name))
1738
self.dbus_object_path = dbus.ObjectPath(
1739
"/clients/" + client_object_name)
786
1740
DBusObjectWithProperties.__init__(self, self.bus,
787
1741
self.dbus_object_path)
788
789
def notifychangeproperty(transform_func,
790
dbus_name, type_func=lambda x: x,
791
variant_level=1):
792
""" Modify a variable so that its a property that announce its
793
changes to DBus.
794
transform_fun: Function that takes a value and transform it to
795
DBus type.
796
dbus_name: DBus name of the variable
1742
1743
def notifychangeproperty(transform_func, dbus_name,
1744
type_func=lambda x: x,
1745
variant_level=1,
1746
invalidate_only=False,
1747
_interface=_interface):
1748
""" Modify a variable so that it's a property which announces
1749
its changes to DBus.
1750
1751
transform_fun: Function that takes a value and a variant_level
1752
and transforms it to a D-Bus type.
1753
dbus_name: D-Bus name of the variable
797
1754
type_func: Function that transform the value before sending it
798
to DBus
799
variant_level: DBus variant level. default: 1
1755
to the D-Bus. Default: no transform
1756
variant_level: D-Bus variant level. Default: 1
800
1757
"""
801
real_value = [None,]
1758
attrname = "_{}".format(dbus_name)
1759
802
1760
def setter(self, value):
803
old_value = real_value[0]
804
real_value[0] = value
805
1761
if hasattr(self, "dbus_object_path"):
806
if type_func(old_value) != type_func(real_value[0]):
807
dbus_value = transform_func(type_func(real_value[0]),
808
variant_level)
809
self.PropertyChanged(dbus.String(dbus_name),
810
dbus_value)
811
812
return property(lambda self: real_value[0], setter)
813
814
1762
if (not hasattr(self, attrname) or
1763
type_func(getattr(self, attrname, None))
1764
!= type_func(value)):
1765
if invalidate_only:
1766
self.PropertiesChanged(
1767
_interface, dbus.Dictionary(),
1768
dbus.Array((dbus_name, )))
1769
else:
1770
dbus_value = transform_func(
1771
type_func(value),
1772
variant_level=variant_level)
1773
self.PropertyChanged(dbus.String(dbus_name),
1774
dbus_value)
1775
self.PropertiesChanged(
1776
_interface,
1777
dbus.Dictionary({dbus.String(dbus_name):
1778
dbus_value}),
1779
dbus.Array())
1780
setattr(self, attrname, value)
1781
1782
return property(lambda self: getattr(self, attrname), setter)
1783
815
1784
expires = notifychangeproperty(datetime_to_dbus, "Expires")
816
1785
approvals_pending = notifychangeproperty(dbus.Boolean,
817
1786
"ApprovalPending",
818
type_func = bool)
1787
type_func=bool)
819
1788
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
820
1789
last_enabled = notifychangeproperty(datetime_to_dbus,
821
1790
"LastEnabled")
822
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
823
type_func = lambda checker: checker is not None)
1791
checker = notifychangeproperty(
1792
dbus.Boolean, "CheckerRunning",
1793
type_func=lambda checker: checker is not None)
824
1794
last_checked_ok = notifychangeproperty(datetime_to_dbus,
825
1795
"LastCheckedOK")
826
last_approval_request = notifychangeproperty(datetime_to_dbus,
827
"LastApprovalRequest")
1796
last_checker_status = notifychangeproperty(dbus.Int16,
1797
"LastCheckerStatus")
1798
last_approval_request = notifychangeproperty(
1799
datetime_to_dbus, "LastApprovalRequest")
828
1800
approved_by_default = notifychangeproperty(dbus.Boolean,
829
1801
"ApprovedByDefault")
830
approval_delay = notifychangeproperty(dbus.UInt16, "ApprovalDelay",
831
type_func = _timedelta_to_milliseconds)
832
approval_duration = notifychangeproperty(dbus.UInt16, "ApprovalDuration",
833
type_func = _timedelta_to_milliseconds)
1802
approval_delay = notifychangeproperty(
1803
dbus.UInt64, "ApprovalDelay",
1804
type_func=lambda td: td.total_seconds() * 1000)
1805
approval_duration = notifychangeproperty(
1806
dbus.UInt64, "ApprovalDuration",
1807
type_func=lambda td: td.total_seconds() * 1000)
834
1808
host = notifychangeproperty(dbus.String, "Host")
835
timeout = notifychangeproperty(dbus.UInt16, "Timeout",
836
type_func = _timedelta_to_milliseconds)
837
extended_timeout = notifychangeproperty(dbus.UInt16, "ExtendedTimeout",
838
type_func = _timedelta_to_milliseconds)
839
interval = notifychangeproperty(dbus.UInt16, "Interval",
840
type_func = _timedelta_to_milliseconds)
1809
timeout = notifychangeproperty(
1810
dbus.UInt64, "Timeout",
1811
type_func=lambda td: td.total_seconds() * 1000)
1812
extended_timeout = notifychangeproperty(
1813
dbus.UInt64, "ExtendedTimeout",
1814
type_func=lambda td: td.total_seconds() * 1000)
1815
interval = notifychangeproperty(
1816
dbus.UInt64, "Interval",
1817
type_func=lambda td: td.total_seconds() * 1000)
841
1818
checker_command = notifychangeproperty(dbus.String, "Checker")
842
1819
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1820
invalidate_only=True)
1821
843
1822
del notifychangeproperty
844
1823
845
1824
def __del__(self, *args, **kwargs):
846
1825
try:
847
1826
self.remove_from_connection()
850
1829
if hasattr(DBusObjectWithProperties, "__del__"):
851
1830
DBusObjectWithProperties.__del__(self, *args, **kwargs)
852
1831
Client.__del__(self, *args, **kwargs)
853
854
def checker_callback(self, pid, condition, command,
855
*args, **kwargs):
856
self.checker_callback_tag = None
857
self.checker = None
858
if os.WIFEXITED(condition):
859
exitstatus = os.WEXITSTATUS(condition)
1832
1833
def checker_callback(self, source, condition,
1834
connection, command, *args, **kwargs):
1835
ret = Client.checker_callback(self, source, condition,
1836
connection, command, *args,
1837
**kwargs)
1838
exitstatus = self.last_checker_status
1839
if exitstatus >= 0:
860
1840
# Emit D-Bus signal
861
1841
self.CheckerCompleted(dbus.Int16(exitstatus),
862
dbus.Int64(condition),
1842
# This is specific to GNU libC
1843
dbus.Int64(exitstatus << 8),
863
1844
dbus.String(command))
864
1845
else:
865
1846
# Emit D-Bus signal
866
1847
self.CheckerCompleted(dbus.Int16(-1),
867
dbus.Int64(condition),
1848
dbus.Int64(
1849
# This is specific to GNU libC
1850
(exitstatus << 8)
1851
| self.last_checker_signal),
868
1852
dbus.String(command))
869
870
return Client.checker_callback(self, pid, condition, command,
871
*args, **kwargs)
872
1853
return ret
1854
873
1855
def start_checker(self, *args, **kwargs):
874
old_checker = self.checker
875
if self.checker is not None:
876
old_checker_pid = self.checker.pid
877
else:
878
old_checker_pid = None
1856
old_checker_pid = getattr(self.checker, "pid", None)
879
1857
r = Client.start_checker(self, *args, **kwargs)
880
1858
# Only if new checker process was started
881
1859
if (self.checker is not None
883
1861
# Emit D-Bus signal
884
1862
self.CheckerStarted(self.current_checker_command)
885
1863
return r
886
1864
887
1865
def _reset_approved(self):
888
self._approved = None
1866
self.approved = None
889
1867
return False
890
1868
891
1869
def approve(self, value=True):
1870
self.approved = value
1871
GLib.timeout_add(int(self.approval_duration.total_seconds()
1872
* 1000), self._reset_approved)
892
1873
self.send_changedstate()
893
self._approved = value
894
gobject.timeout_add(_timedelta_to_milliseconds
895
(self.approval_duration),
896
self._reset_approved)
897
898
899
## D-Bus methods, signals & properties
900
_interface = "se.bsnet.fukt.Mandos.Client"
901
902
## Signals
903
1874
1875
# D-Bus methods, signals & properties
1876
1877
# Interfaces
1878
1879
# Signals
1880
904
1881
# CheckerCompleted - signal
905
1882
@dbus.service.signal(_interface, signature="nxs")
906
1883
def CheckerCompleted(self, exitcode, waitstatus, command):
907
1884
"D-Bus signal"
908
1885
pass
909
1886
910
1887
# CheckerStarted - signal
911
1888
@dbus.service.signal(_interface, signature="s")
912
1889
def CheckerStarted(self, command):
913
1890
"D-Bus signal"
914
1891
pass
915
1892
916
1893
# PropertyChanged - signal
1894
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
917
1895
@dbus.service.signal(_interface, signature="sv")
918
1896
def PropertyChanged(self, property, value):
919
1897
"D-Bus signal"
920
1898
pass
921
1899
922
1900
# GotSecret - signal
923
1901
@dbus.service.signal(_interface)
924
1902
def GotSecret(self):
927
1905
server to mandos-client
928
1906
"""
929
1907
pass
930
1908
931
1909
# Rejected - signal
932
1910
@dbus.service.signal(_interface, signature="s")
933
1911
def Rejected(self, reason):
934
1912
"D-Bus signal"
935
1913
pass
936
1914
937
1915
# NeedApproval - signal
938
1916
@dbus.service.signal(_interface, signature="tb")
939
1917
def NeedApproval(self, timeout, default):
940
1918
"D-Bus signal"
941
1919
return self.need_approval()
942
943
## Methods
944
1920
1921
# Methods
1922
945
1923
# Approve - method
946
1924
@dbus.service.method(_interface, in_signature="b")
947
1925
def Approve(self, value):
948
1926
self.approve(value)
949
1927
950
1928
# CheckedOK - method
951
1929
@dbus.service.method(_interface)
952
1930
def CheckedOK(self):
953
1931
self.checked_ok()
954
1932
955
1933
# Enable - method
1934
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
956
1935
@dbus.service.method(_interface)
957
1936
def Enable(self):
958
1937
"D-Bus method"
959
1938
self.enable()
960
1939
961
1940
# StartChecker - method
1941
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
962
1942
@dbus.service.method(_interface)
963
1943
def StartChecker(self):
964
1944
"D-Bus method"
965
1945
self.start_checker()
966
1946
967
1947
# Disable - method
1948
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
968
1949
@dbus.service.method(_interface)
969
1950
def Disable(self):
970
1951
"D-Bus method"
971
1952
self.disable()
972
1953
973
1954
# StopChecker - method
1955
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
974
1956
@dbus.service.method(_interface)
975
1957
def StopChecker(self):
976
1958
self.stop_checker()
977
978
## Properties
979
1959
1960
# Properties
1961
980
1962
# ApprovalPending - property
981
1963
@dbus_service_property(_interface, signature="b", access="read")
982
1964
def ApprovalPending_dbus_property(self):
983
1965
return dbus.Boolean(bool(self.approvals_pending))
984
1966
985
1967
# ApprovedByDefault - property
986
@dbus_service_property(_interface, signature="b",
1968
@dbus_service_property(_interface,
1969
signature="b",
987
1970
access="readwrite")
988
1971
def ApprovedByDefault_dbus_property(self, value=None):
989
1972
if value is None: # get
990
1973
return dbus.Boolean(self.approved_by_default)
991
1974
self.approved_by_default = bool(value)
992
1975
993
1976
# ApprovalDelay - property
994
@dbus_service_property(_interface, signature="t",
1977
@dbus_service_property(_interface,
1978
signature="t",
995
1979
access="readwrite")
996
1980
def ApprovalDelay_dbus_property(self, value=None):
997
1981
if value is None: # get
998
return dbus.UInt64(self.approval_delay_milliseconds())
1982
return dbus.UInt64(self.approval_delay.total_seconds()
1983
* 1000)
999
1984
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1000
1985
1001
1986
# ApprovalDuration - property
1002
@dbus_service_property(_interface, signature="t",
1987
@dbus_service_property(_interface,
1988
signature="t",
1003
1989
access="readwrite")
1004
1990
def ApprovalDuration_dbus_property(self, value=None):
1005
1991
if value is None: # get
1006
return dbus.UInt64(_timedelta_to_milliseconds(
1007
self.approval_duration))
1992
return dbus.UInt64(self.approval_duration.total_seconds()
1993
* 1000)
1008
1994
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1009
1995
1010
1996
# Name - property
1997
@dbus_annotations(
1998
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1011
1999
@dbus_service_property(_interface, signature="s", access="read")
1012
2000
def Name_dbus_property(self):
1013
2001
return dbus.String(self.name)
1014
2002
1015
2003
# Fingerprint - property
2004
@dbus_annotations(
2005
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1016
2006
@dbus_service_property(_interface, signature="s", access="read")
1017
2007
def Fingerprint_dbus_property(self):
1018
2008
return dbus.String(self.fingerprint)
1019
2009
1020
2010
# Host - property
1021
@dbus_service_property(_interface, signature="s",
2011
@dbus_service_property(_interface,
2012
signature="s",
1022
2013
access="readwrite")
1023
2014
def Host_dbus_property(self, value=None):
1024
2015
if value is None: # get
1025
2016
return dbus.String(self.host)
1026
self.host = value
1027
2017
self.host = str(value)
2018
1028
2019
# Created - property
2020
@dbus_annotations(
2021
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1029
2022
@dbus_service_property(_interface, signature="s", access="read")
1030
2023
def Created_dbus_property(self):
1031
return dbus.String(datetime_to_dbus(self.created))
1032
2024
return datetime_to_dbus(self.created)
2025
1033
2026
# LastEnabled - property
1034
2027
@dbus_service_property(_interface, signature="s", access="read")
1035
2028
def LastEnabled_dbus_property(self):
1036
2029
return datetime_to_dbus(self.last_enabled)
1037
2030
1038
2031
# Enabled - property
1039
@dbus_service_property(_interface, signature="b",
2032
@dbus_service_property(_interface,
2033
signature="b",
1040
2034
access="readwrite")
1041
2035
def Enabled_dbus_property(self, value=None):
1042
2036
if value is None: # get
1045
2039
self.enable()
1046
2040
else:
1047
2041
self.disable()
1048
2042
1049
2043
# LastCheckedOK - property
1050
@dbus_service_property(_interface, signature="s",
2044
@dbus_service_property(_interface,
2045
signature="s",
1051
2046
access="readwrite")
1052
2047
def LastCheckedOK_dbus_property(self, value=None):
1053
2048
if value is not None:
1054
2049
self.checked_ok()
1055
2050
return
1056
2051
return datetime_to_dbus(self.last_checked_ok)
1057
2052
2053
# LastCheckerStatus - property
2054
@dbus_service_property(_interface, signature="n", access="read")
2055
def LastCheckerStatus_dbus_property(self):
2056
return dbus.Int16(self.last_checker_status)
2057
1058
2058
# Expires - property
1059
2059
@dbus_service_property(_interface, signature="s", access="read")
1060
2060
def Expires_dbus_property(self):
1061
2061
return datetime_to_dbus(self.expires)
1062
2062
1063
2063
# LastApprovalRequest - property
1064
2064
@dbus_service_property(_interface, signature="s", access="read")
1065
2065
def LastApprovalRequest_dbus_property(self):
1066
2066
return datetime_to_dbus(self.last_approval_request)
1067
2067
1068
2068
# Timeout - property
1069
@dbus_service_property(_interface, signature="t",
2069
@dbus_service_property(_interface,
2070
signature="t",
1070
2071
access="readwrite")
1071
2072
def Timeout_dbus_property(self, value=None):
1072
2073
if value is None: # get
1073
return dbus.UInt64(self.timeout_milliseconds())
2074
return dbus.UInt64(self.timeout.total_seconds() * 1000)
2075
old_timeout = self.timeout
1074
2076
self.timeout = datetime.timedelta(0, 0, 0, value)
1075
if getattr(self, "disable_initiator_tag", None) is None:
1076
return
1077
# Reschedule timeout
1078
gobject.source_remove(self.disable_initiator_tag)
1079
self.disable_initiator_tag = None
1080
self.expires = None
1081
time_to_die = (self.
1082
_timedelta_to_milliseconds((self
1083
.last_checked_ok
1084
+ self.timeout)
1085
- datetime.datetime
1086
.utcnow()))
1087
if time_to_die <= 0:
1088
# The timeout has passed
1089
self.disable()
1090
else:
1091
self.expires = (datetime.datetime.utcnow()
1092
+ datetime.timedelta(milliseconds = time_to_die))
1093
self.disable_initiator_tag = (gobject.timeout_add
1094
(time_to_die, self.disable))
1095
2077
# Reschedule disabling
2078
if self.enabled:
2079
now = datetime.datetime.utcnow()
2080
self.expires += self.timeout - old_timeout
2081
if self.expires <= now:
2082
# The timeout has passed
2083
self.disable()
2084
else:
2085
if (getattr(self, "disable_initiator_tag", None)
2086
is None):
2087
return
2088
GLib.source_remove(self.disable_initiator_tag)
2089
self.disable_initiator_tag = GLib.timeout_add(
2090
int((self.expires - now).total_seconds() * 1000),
2091
self.disable)
2092
1096
2093
# ExtendedTimeout - property
1097
@dbus_service_property(_interface, signature="t",
2094
@dbus_service_property(_interface,
2095
signature="t",
1098
2096
access="readwrite")
1099
2097
def ExtendedTimeout_dbus_property(self, value=None):
1100
2098
if value is None: # get
1101
return dbus.UInt64(self.extended_timeout_milliseconds())
2099
return dbus.UInt64(self.extended_timeout.total_seconds()
2100
* 1000)
1102
2101
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1103
2102
1104
2103
# Interval - property
1105
@dbus_service_property(_interface, signature="t",
2104
@dbus_service_property(_interface,
2105
signature="t",
1106
2106
access="readwrite")
1107
2107
def Interval_dbus_property(self, value=None):
1108
2108
if value is None: # get
1109
return dbus.UInt64(self.interval_milliseconds())
2109
return dbus.UInt64(self.interval.total_seconds() * 1000)
1110
2110
self.interval = datetime.timedelta(0, 0, 0, value)
1111
2111
if getattr(self, "checker_initiator_tag", None) is None:
1112
2112
return
1113
# Reschedule checker run
1114
gobject.source_remove(self.checker_initiator_tag)
1115
self.checker_initiator_tag = (gobject.timeout_add
1116
(value, self.start_checker))
1117
self.start_checker() # Start one now, too
1118
2113
if self.enabled:
2114
# Reschedule checker run
2115
GLib.source_remove(self.checker_initiator_tag)
2116
self.checker_initiator_tag = GLib.timeout_add(
2117
value, self.start_checker)
2118
self.start_checker() # Start one now, too
2119
1119
2120
# Checker - property
1120
@dbus_service_property(_interface, signature="s",
2121
@dbus_service_property(_interface,
2122
signature="s",
1121
2123
access="readwrite")
1122
2124
def Checker_dbus_property(self, value=None):
1123
2125
if value is None: # get
1124
2126
return dbus.String(self.checker_command)
1125
self.checker_command = value
1126
2127
self.checker_command = str(value)
2128
1127
2129
# CheckerRunning - property
1128
@dbus_service_property(_interface, signature="b",
2130
@dbus_service_property(_interface,
2131
signature="b",
1129
2132
access="readwrite")
1130
2133
def CheckerRunning_dbus_property(self, value=None):
1131
2134
if value is None: # get
1134
2137
self.start_checker()
1135
2138
else:
1136
2139
self.stop_checker()
1137
2140
1138
2141
# ObjectPath - property
2142
@dbus_annotations(
2143
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
2144
"org.freedesktop.DBus.Deprecated": "true"})
1139
2145
@dbus_service_property(_interface, signature="o", access="read")
1140
2146
def ObjectPath_dbus_property(self):
1141
return self.dbus_object_path # is already a dbus.ObjectPath
1142
2147
return self.dbus_object_path # is already a dbus.ObjectPath
2148
1143
2149
# Secret = property
1144
@dbus_service_property(_interface, signature="ay",
1145
access="write", byte_arrays=True)
2150
@dbus_annotations(
2151
{"org.freedesktop.DBus.Property.EmitsChangedSignal":
2152
"invalidates"})
2153
@dbus_service_property(_interface,
2154
signature="ay",
2155
access="write",
2156
byte_arrays=True)
1146
2157
def Secret_dbus_property(self, value):
1147
self.secret = str(value)
1148
2158
self.secret = bytes(value)
2159
1149
2160
del _interface
1150
2161
1151
2162
1154
2165
self._pipe = child_pipe
1155
2166
self._pipe.send(('init', fpr, address))
1156
2167
if not self._pipe.recv():
1157
raise KeyError()
1158
2168
raise KeyError(fpr)
2169
1159
2170
def __getattribute__(self, name):
1160
if(name == '_pipe'):
2171
if name == '_pipe':
1161
2172
return super(ProxyClient, self).__getattribute__(name)
1162
2173
self._pipe.send(('getattr', name))
1163
2174
data = self._pipe.recv()
1164
2175
if data[0] == 'data':
1165
2176
return data[1]
1166
2177
if data[0] == 'function':
2178
1167
2179
def func(*args, **kwargs):
1168
2180
self._pipe.send(('funcall', name, args, kwargs))
1169
2181
return self._pipe.recv()[1]
2182
1170
2183
return func
1171
2184
1172
2185
def __setattr__(self, name, value):
1173
if(name == '_pipe'):
2186
if name == '_pipe':
1174
2187
return super(ProxyClient, self).__setattr__(name, value)
1175
2188
self._pipe.send(('setattr', name, value))
1176
2189
1177
2190
1178
2191
class ClientHandler(socketserver.BaseRequestHandler, object):
1179
2192
"""A class to handle client connections.
1180
2193
1181
2194
Instantiated once for each connection to handle it.
1182
2195
Note: This will run in its own forked process."""
1183
2196
1184
2197
def handle(self):
1185
2198
with contextlib.closing(self.server.child_pipe) as child_pipe:
1186
2199
logger.info("TCP connection from: %s",
1187
unicode(self.client_address))
2200
str(self.client_address))
1188
2201
logger.debug("Pipe FD: %d",
1189
2202
self.server.child_pipe.fileno())
1190
1191
session = (gnutls.connection
1192
.ClientSession(self.request,
1193
gnutls.connection
1194
.X509Credentials()))
1195
1196
# Note: gnutls.connection.X509Credentials is really a
1197
# generic GnuTLS certificate credentials object so long as
1198
# no X.509 keys are added to it. Therefore, we can use it
1199
# here despite using OpenPGP certificates.
1200
1201
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1202
# "+AES-256-CBC", "+SHA1",
1203
# "+COMP-NULL", "+CTYPE-OPENPGP",
1204
# "+DHE-DSS"))
2203
2204
session = gnutls.ClientSession(self.request)
2205
2206
# priority = ':'.join(("NONE", "+VERS-TLS1.1",
2207
# "+AES-256-CBC", "+SHA1",
2208
# "+COMP-NULL", "+CTYPE-OPENPGP",
2209
# "+DHE-DSS"))
1205
2210
# Use a fallback default, since this MUST be set.
1206
2211
priority = self.server.gnutls_priority
1207
2212
if priority is None:
1208
2213
priority = "NORMAL"
1209
(gnutls.library.functions
1210
.gnutls_priority_set_direct(session._c_object,
1211
priority, None))
1212
2214
gnutls.priority_set_direct(session._c_object,
2215
priority.encode("utf-8"),
2216
None)
2217
1213
2218
# Start communication using the Mandos protocol
1214
2219
# Get protocol number
1215
2220
line = self.request.makefile().readline()
1216
2221
logger.debug("Protocol version: %r", line)
1217
2222
try:
1218
2223
if int(line.strip().split()[0]) > 1:
1219
raise RuntimeError
2224
raise RuntimeError(line)
1220
2225
except (ValueError, IndexError, RuntimeError) as error:
1221
2226
logger.error("Unknown protocol version: %s", error)
1222
2227
return
1223
2228
1224
2229
# Start GnuTLS connection
1225
2230
try:
1226
2231
session.handshake()
1227
except gnutls.errors.GNUTLSError as error:
2232
except gnutls.Error as error:
1228
2233
logger.warning("Handshake failed: %s", error)
1229
2234
# Do not run session.bye() here: the session is not
1230
2235
# established. Just abandon the request.
1231
2236
return
1232
2237
logger.debug("Handshake succeeded")
1233
2238
1234
2239
approval_required = False
1235
2240
try:
1236
2241
try:
1237
fpr = self.fingerprint(self.peer_certificate
1238
(session))
1239
except (TypeError,
1240
gnutls.errors.GNUTLSError) as error:
2242
fpr = self.fingerprint(
2243
self.peer_certificate(session))
2244
except (TypeError, gnutls.Error) as error:
1241
2245
logger.warning("Bad certificate: %s", error)
1242
2246
return
1243
2247
logger.debug("Fingerprint: %s", fpr)
1244
2248
1245
2249
try:
1246
2250
client = ProxyClient(child_pipe, fpr,
1247
2251
self.client_address)
1248
2252
except KeyError:
1249
2253
return
1250
2254
1251
2255
if client.approval_delay:
1252
2256
delay = client.approval_delay
1253
2257
client.approvals_pending += 1
1254
2258
approval_required = True
1255
2259
1256
2260
while True:
1257
2261
if not client.enabled:
1258
2262
logger.info("Client %s is disabled",
1259
client.name)
2263
client.name)
1260
2264
if self.server.use_dbus:
1261
2265
# Emit D-Bus signal
1262
client.Rejected("Disabled")
2266
client.Rejected("Disabled")
1263
2267
return
1264
1265
if client._approved or not client.approval_delay:
1266
#We are approved or approval is disabled
2268
2269
if client.approved or not client.approval_delay:
2270
# We are approved or approval is disabled
1267
2271
break
1268
elif client._approved is None:
2272
elif client.approved is None:
1269
2273
logger.info("Client %s needs approval",
1270
2274
client.name)
1271
2275
if self.server.use_dbus:
1272
2276
# Emit D-Bus signal
1273
2277
client.NeedApproval(
1274
client.approval_delay_milliseconds(),
1275
client.approved_by_default)
2278
client.approval_delay.total_seconds()
2279
* 1000, client.approved_by_default)
1276
2280
else:
1277
2281
logger.warning("Client %s was not approved",
1278
2282
client.name)
1280
2284
# Emit D-Bus signal
1281
2285
client.Rejected("Denied")
1282
2286
return
1283
1284
#wait until timeout or approved
1285
#x = float(client._timedelta_to_milliseconds(delay))
2287
2288
# wait until timeout or approved
1286
2289
time = datetime.datetime.now()
1287
2290
client.changedstate.acquire()
1288
client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))
2291
client.changedstate.wait(delay.total_seconds())
1289
2292
client.changedstate.release()
1290
2293
time2 = datetime.datetime.now()
1291
2294
if (time2 - time) >= delay:
1301
2304
break
1302
2305
else:
1303
2306
delay -= time2 - time
1304
1305
sent_size = 0
1306
while sent_size < len(client.secret):
1307
try:
1308
sent = session.send(client.secret[sent_size:])
1309
except gnutls.errors.GNUTLSError as error:
1310
logger.warning("gnutls send failed")
1311
return
1312
logger.debug("Sent: %d, remaining: %d",
1313
sent, len(client.secret)
1314
- (sent_size + sent))
1315
sent_size += sent
1316
2307
2308
try:
2309
session.send(client.secret)
2310
except gnutls.Error as error:
2311
logger.warning("gnutls send failed",
2312
exc_info=error)
2313
return
2314
1317
2315
logger.info("Sending secret to %s", client.name)
1318
# bump the timeout as if seen
1319
client.checked_ok(client.extended_timeout)
2316
# bump the timeout using extended_timeout
2317
client.bump_timeout(client.extended_timeout)
1320
2318
if self.server.use_dbus:
1321
2319
# Emit D-Bus signal
1322
2320
client.GotSecret()
1323
2321
1324
2322
finally:
1325
2323
if approval_required:
1326
2324
client.approvals_pending -= 1
1327
2325
try:
1328
2326
session.bye()
1329
except gnutls.errors.GNUTLSError as error:
1330
logger.warning("GnuTLS bye failed")
1331
2327
except gnutls.Error as error:
2328
logger.warning("GnuTLS bye failed",
2329
exc_info=error)
2330
1332
2331
@staticmethod
1333
2332
def peer_certificate(session):
1334
2333
"Return the peer's OpenPGP certificate as a bytestring"
1335
2334
# If not an OpenPGP certificate...
1336
if (gnutls.library.functions
1337
.gnutls_certificate_type_get(session._c_object)
1338
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1339
# ...do the normal thing
1340
return session.peer_certificate
2335
if (gnutls.certificate_type_get(session._c_object)
2336
!= gnutls.CRT_OPENPGP):
2337
# ...return invalid data
2338
return b""
1341
2339
list_size = ctypes.c_uint(1)
1342
cert_list = (gnutls.library.functions
1343
.gnutls_certificate_get_peers
2340
cert_list = (gnutls.certificate_get_peers
1344
2341
(session._c_object, ctypes.byref(list_size)))
1345
2342
if not bool(cert_list) and list_size.value != 0:
1346
raise gnutls.errors.GNUTLSError("error getting peer"
1347
" certificate")
2343
raise gnutls.Error("error getting peer certificate")
1348
2344
if list_size.value == 0:
1349
2345
return None
1350
2346
cert = cert_list[0]
1351
2347
return ctypes.string_at(cert.data, cert.size)
1352
2348
1353
2349
@staticmethod
1354
2350
def fingerprint(openpgp):
1355
2351
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1356
2352
# New GnuTLS "datum" with the OpenPGP public key
1357
datum = (gnutls.library.types
1358
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1359
ctypes.POINTER
1360
(ctypes.c_ubyte)),
1361
ctypes.c_uint(len(openpgp))))
2353
datum = gnutls.datum_t(
2354
ctypes.cast(ctypes.c_char_p(openpgp),
2355
ctypes.POINTER(ctypes.c_ubyte)),
2356
ctypes.c_uint(len(openpgp)))
1362
2357
# New empty GnuTLS certificate
1363
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1364
(gnutls.library.functions
1365
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
2358
crt = gnutls.openpgp_crt_t()
2359
gnutls.openpgp_crt_init(ctypes.byref(crt))
1366
2360
# Import the OpenPGP public key into the certificate
1367
(gnutls.library.functions
1368
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1369
gnutls.library.constants
1370
.GNUTLS_OPENPGP_FMT_RAW))
2361
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2362
gnutls.OPENPGP_FMT_RAW)
1371
2363
# Verify the self signature in the key
1372
2364
crtverify = ctypes.c_uint()
1373
(gnutls.library.functions
1374
.gnutls_openpgp_crt_verify_self(crt, 0,
1375
ctypes.byref(crtverify)))
2365
gnutls.openpgp_crt_verify_self(crt, 0,
2366
ctypes.byref(crtverify))
1376
2367
if crtverify.value != 0:
1377
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1378
raise (gnutls.errors.CertificateSecurityError
1379
("Verify failed"))
2368
gnutls.openpgp_crt_deinit(crt)
2369
raise gnutls.CertificateSecurityError("Verify failed")
1380
2370
# New buffer for the fingerprint
1381
2371
buf = ctypes.create_string_buffer(20)
1382
2372
buf_len = ctypes.c_size_t()
1383
2373
# Get the fingerprint from the certificate into the buffer
1384
(gnutls.library.functions
1385
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1386
ctypes.byref(buf_len)))
2374
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2375
ctypes.byref(buf_len))
1387
2376
# Deinit the certificate
1388
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2377
gnutls.openpgp_crt_deinit(crt)
1389
2378
# Convert the buffer to a Python bytestring
1390
2379
fpr = ctypes.string_at(buf, buf_len.value)
1391
2380
# Convert the bytestring to hexadecimal notation
1392
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
2381
hex_fpr = binascii.hexlify(fpr).upper()
1393
2382
return hex_fpr
1394
2383
1395
2384
1396
2385
class MultiprocessingMixIn(object):
1397
2386
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2387
1398
2388
def sub_process_main(self, request, address):
1399
2389
try:
1400
2390
self.finish_request(request, address)
1401
except:
2391
except Exception:
1402
2392
self.handle_error(request, address)
1403
2393
self.close_request(request)
1404
2394
1405
2395
def process_request(self, request, address):
1406
2396
"""Start a new process to process the request."""
1407
multiprocessing.Process(target = self.sub_process_main,
1408
args = (request, address)).start()
2397
proc = multiprocessing.Process(target=self.sub_process_main,
2398
args=(request, address))
2399
proc.start()
2400
return proc
1409
2401
1410
2402
1411
2403
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1412
2404
""" adds a pipe to the MixIn """
2405
1413
2406
def process_request(self, request, client_address):
1414
2407
"""Overrides and wraps the original process_request().
1415
2408
1416
2409
This function creates a new pipe in self.pipe
1417
2410
"""
1418
2411
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1419
1420
super(MultiprocessingMixInWithPipe,
1421
self).process_request(request, client_address)
2412
2413
proc = MultiprocessingMixIn.process_request(self, request,
2414
client_address)
1422
2415
self.child_pipe.close()
1423
self.add_pipe(parent_pipe)
1424
1425
def add_pipe(self, parent_pipe):
2416
self.add_pipe(parent_pipe, proc)
2417
2418
def add_pipe(self, parent_pipe, proc):
1426
2419
"""Dummy function; override as necessary"""
1427
raise NotImplementedError
2420
raise NotImplementedError()
1428
2421
1429
2422
1430
2423
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1431
2424
socketserver.TCPServer, object):
1432
2425
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1433
2426
1434
2427
Attributes:
1435
2428
enabled: Boolean; whether this server is activated yet
1436
2429
interface: None or a network interface name (string)
1437
2430
use_ipv6: Boolean; to use IPv6 or not
1438
2431
"""
2432
1439
2433
def __init__(self, server_address, RequestHandlerClass,
1440
interface=None, use_ipv6=True):
2434
interface=None,
2435
use_ipv6=True,
2436
socketfd=None):
2437
"""If socketfd is set, use that file descriptor instead of
2438
creating a new one with socket.socket().
2439
"""
1441
2440
self.interface = interface
1442
2441
if use_ipv6:
1443
2442
self.address_family = socket.AF_INET6
2443
if socketfd is not None:
2444
# Save the file descriptor
2445
self.socketfd = socketfd
2446
# Save the original socket.socket() function
2447
self.socket_socket = socket.socket
2448
2449
# To implement --socket, we monkey patch socket.socket.
2450
#
2451
# (When socketserver.TCPServer is a new-style class, we
2452
# could make self.socket into a property instead of monkey
2453
# patching socket.socket.)
2454
#
2455
# Create a one-time-only replacement for socket.socket()
2456
@functools.wraps(socket.socket)
2457
def socket_wrapper(*args, **kwargs):
2458
# Restore original function so subsequent calls are
2459
# not affected.
2460
socket.socket = self.socket_socket
2461
del self.socket_socket
2462
# This time only, return a new socket object from the
2463
# saved file descriptor.
2464
return socket.fromfd(self.socketfd, *args, **kwargs)
2465
# Replace socket.socket() function with wrapper
2466
socket.socket = socket_wrapper
2467
# The socketserver.TCPServer.__init__ will call
2468
# socket.socket(), which might be our replacement,
2469
# socket_wrapper(), if socketfd was set.
1444
2470
socketserver.TCPServer.__init__(self, server_address,
1445
2471
RequestHandlerClass)
2472
1446
2473
def server_bind(self):
1447
2474
"""This overrides the normal server_bind() function
1448
2475
to bind to an interface if one was specified, and also NOT to
1449
2476
bind to an address or port if they were not specified."""
2477
global SO_BINDTODEVICE
1450
2478
if self.interface is not None:
1451
2479
if SO_BINDTODEVICE is None:
1452
logger.error("SO_BINDTODEVICE does not exist;"
1453
" cannot bind to interface %s",
1454
self.interface)
1455
else:
1456
try:
1457
self.socket.setsockopt(socket.SOL_SOCKET,
1458
SO_BINDTODEVICE,
1459
str(self.interface
1460
+ '\0'))
1461
except socket.error as error:
1462
if error[0] == errno.EPERM:
1463
logger.error("No permission to"
1464
" bind to interface %s",
1465
self.interface)
1466
elif error[0] == errno.ENOPROTOOPT:
1467
logger.error("SO_BINDTODEVICE not available;"
1468
" cannot bind to interface %s",
1469
self.interface)
1470
else:
1471
raise
2480
# Fall back to a hard-coded value which seems to be
2481
# common enough.
2482
logger.warning("SO_BINDTODEVICE not found, trying 25")
2483
SO_BINDTODEVICE = 25
2484
try:
2485
self.socket.setsockopt(
2486
socket.SOL_SOCKET, SO_BINDTODEVICE,
2487
(self.interface + "\0").encode("utf-8"))
2488
except socket.error as error:
2489
if error.errno == errno.EPERM:
2490
logger.error("No permission to bind to"
2491
" interface %s", self.interface)
2492
elif error.errno == errno.ENOPROTOOPT:
2493
logger.error("SO_BINDTODEVICE not available;"
2494
" cannot bind to interface %s",
2495
self.interface)
2496
elif error.errno == errno.ENODEV:
2497
logger.error("Interface %s does not exist,"
2498
" cannot bind", self.interface)
2499
else:
2500
raise
1472
2501
# Only bind(2) the socket if we really need to.
1473
2502
if self.server_address[0] or self.server_address[1]:
1474
2503
if not self.server_address[0]:
1475
2504
if self.address_family == socket.AF_INET6:
1476
any_address = "::" # in6addr_any
2505
any_address = "::" # in6addr_any
1477
2506
else:
1478
any_address = socket.INADDR_ANY
2507
any_address = "0.0.0.0" # INADDR_ANY
1479
2508
self.server_address = (any_address,
1480
2509
self.server_address[1])
1481
2510
elif not self.server_address[1]:
1482
self.server_address = (self.server_address[0],
1483
0)
2511
self.server_address = (self.server_address[0], 0)
1484
2512
# if self.interface:
1485
2513
# self.server_address = (self.server_address[0],
1486
2514
# 0, # port
1492
2520
1493
2521
class MandosServer(IPv6_TCPServer):
1494
2522
"""Mandos server.
1495
2523
1496
2524
Attributes:
1497
2525
clients: set of Client objects
1498
2526
gnutls_priority GnuTLS priority string
1499
2527
use_dbus: Boolean; to emit D-Bus signals or not
1500
1501
Assumes a gobject.MainLoop event loop.
2528
2529
Assumes a GLib.MainLoop event loop.
1502
2530
"""
2531
1503
2532
def __init__(self, server_address, RequestHandlerClass,
1504
interface=None, use_ipv6=True, clients=None,
1505
gnutls_priority=None, use_dbus=True):
2533
interface=None,
2534
use_ipv6=True,
2535
clients=None,
2536
gnutls_priority=None,
2537
use_dbus=True,
2538
socketfd=None):
1506
2539
self.enabled = False
1507
2540
self.clients = clients
1508
2541
if self.clients is None:
1509
self.clients = set()
2542
self.clients = {}
1510
2543
self.use_dbus = use_dbus
1511
2544
self.gnutls_priority = gnutls_priority
1512
2545
IPv6_TCPServer.__init__(self, server_address,
1513
2546
RequestHandlerClass,
1514
interface = interface,
1515
use_ipv6 = use_ipv6)
2547
interface=interface,
2548
use_ipv6=use_ipv6,
2549
socketfd=socketfd)
2550
1516
2551
def server_activate(self):
1517
2552
if self.enabled:
1518
2553
return socketserver.TCPServer.server_activate(self)
2554
1519
2555
def enable(self):
1520
2556
self.enabled = True
1521
def add_pipe(self, parent_pipe):
2557
2558
def add_pipe(self, parent_pipe, proc):
1522
2559
# Call "handle_ipc" for both data and EOF events
1523
gobject.io_add_watch(parent_pipe.fileno(),
1524
gobject.IO_IN | gobject.IO_HUP,
1525
functools.partial(self.handle_ipc,
1526
parent_pipe = parent_pipe))
1527
1528
def handle_ipc(self, source, condition, parent_pipe=None,
2560
GLib.io_add_watch(
2561
parent_pipe.fileno(),
2562
GLib.IO_IN | GLib.IO_HUP,
2563
functools.partial(self.handle_ipc,
2564
parent_pipe=parent_pipe,
2565
proc=proc))
2566
2567
def handle_ipc(self, source, condition,
2568
parent_pipe=None,
2569
proc=None,
1529
2570
client_object=None):
1530
condition_names = {
1531
gobject.IO_IN: "IN", # There is data to read.
1532
gobject.IO_OUT: "OUT", # Data can be written (without
1533
# blocking).
1534
gobject.IO_PRI: "PRI", # There is urgent data to read.
1535
gobject.IO_ERR: "ERR", # Error condition.
1536
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1537
# broken, usually for pipes and
1538
# sockets).
1539
}
1540
conditions_string = ' | '.join(name
1541
for cond, name in
1542
condition_names.iteritems()
1543
if cond & condition)
1544
# error or the other end of multiprocessing.Pipe has closed
1545
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
2571
# error, or the other end of multiprocessing.Pipe has closed
2572
if condition & (GLib.IO_ERR | GLib.IO_HUP):
2573
# Wait for other process to exit
2574
proc.join()
1546
2575
return False
1547
2576
1548
2577
# Read a request from the child
1549
2578
request = parent_pipe.recv()
1550
2579
command = request[0]
1551
2580
1552
2581
if command == 'init':
1553
fpr = request[1]
2582
fpr = request[1].decode("ascii")
1554
2583
address = request[2]
1555
1556
for c in self.clients:
2584
2585
for c in self.clients.values():
1557
2586
if c.fingerprint == fpr:
1558
2587
client = c
1559
2588
break
1562
2591
"dress: %s", fpr, address)
1563
2592
if self.use_dbus:
1564
2593
# Emit D-Bus signal
1565
mandos_dbus_service.ClientNotFound(fpr, address[0])
2594
mandos_dbus_service.ClientNotFound(fpr,
2595
address[0])
1566
2596
parent_pipe.send(False)
1567
2597
return False
1568
1569
gobject.io_add_watch(parent_pipe.fileno(),
1570
gobject.IO_IN | gobject.IO_HUP,
1571
functools.partial(self.handle_ipc,
1572
parent_pipe = parent_pipe,
1573
client_object = client))
2598
2599
GLib.io_add_watch(
2600
parent_pipe.fileno(),
2601
GLib.IO_IN | GLib.IO_HUP,
2602
functools.partial(self.handle_ipc,
2603
parent_pipe=parent_pipe,
2604
proc=proc,
2605
client_object=client))
1574
2606
parent_pipe.send(True)
1575
# remove the old hook in favor of the new above hook on same fileno
2607
# remove the old hook in favor of the new above hook on
2608
# same fileno
1576
2609
return False
1577
2610
if command == 'funcall':
1578
2611
funcname = request[1]
1579
2612
args = request[2]
1580
2613
kwargs = request[3]
1581
1582
parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))
1583
2614
2615
parent_pipe.send(('data', getattr(client_object,
2616
funcname)(*args,
2617
**kwargs)))
2618
1584
2619
if command == 'getattr':
1585
2620
attrname = request[1]
1586
if callable(client_object.__getattribute__(attrname)):
1587
parent_pipe.send(('function',))
2621
if isinstance(client_object.__getattribute__(attrname),
2622
collections.Callable):
2623
parent_pipe.send(('function', ))
1588
2624
else:
1589
parent_pipe.send(('data', client_object.__getattribute__(attrname)))
1590
2625
parent_pipe.send((
2626
'data', client_object.__getattribute__(attrname)))
2627
1591
2628
if command == 'setattr':
1592
2629
attrname = request[1]
1593
2630
value = request[2]
1594
2631
setattr(client_object, attrname, value)
1595
2632
1596
2633
return True
1597
2634
1598
2635
2636
def rfc3339_duration_to_delta(duration):
2637
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2638
2639
>>> rfc3339_duration_to_delta("P7D")
2640
datetime.timedelta(7)
2641
>>> rfc3339_duration_to_delta("PT60S")
2642
datetime.timedelta(0, 60)
2643
>>> rfc3339_duration_to_delta("PT60M")
2644
datetime.timedelta(0, 3600)
2645
>>> rfc3339_duration_to_delta("PT24H")
2646
datetime.timedelta(1)
2647
>>> rfc3339_duration_to_delta("P1W")
2648
datetime.timedelta(7)
2649
>>> rfc3339_duration_to_delta("PT5M30S")
2650
datetime.timedelta(0, 330)
2651
>>> rfc3339_duration_to_delta("P1DT3M20S")
2652
datetime.timedelta(1, 200)
2653
"""
2654
2655
# Parsing an RFC 3339 duration with regular expressions is not
2656
# possible - there would have to be multiple places for the same
2657
# values, like seconds. The current code, while more esoteric, is
2658
# cleaner without depending on a parsing library. If Python had a
2659
# built-in library for parsing we would use it, but we'd like to
2660
# avoid excessive use of external libraries.
2661
2662
# New type for defining tokens, syntax, and semantics all-in-one
2663
Token = collections.namedtuple("Token", (
2664
"regexp", # To match token; if "value" is not None, must have
2665
# a "group" containing digits
2666
"value", # datetime.timedelta or None
2667
"followers")) # Tokens valid after this token
2668
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2669
# the "duration" ABNF definition in RFC 3339, Appendix A.
2670
token_end = Token(re.compile(r"$"), None, frozenset())
2671
token_second = Token(re.compile(r"(\d+)S"),
2672
datetime.timedelta(seconds=1),
2673
frozenset((token_end, )))
2674
token_minute = Token(re.compile(r"(\d+)M"),
2675
datetime.timedelta(minutes=1),
2676
frozenset((token_second, token_end)))
2677
token_hour = Token(re.compile(r"(\d+)H"),
2678
datetime.timedelta(hours=1),
2679
frozenset((token_minute, token_end)))
2680
token_time = Token(re.compile(r"T"),
2681
None,
2682
frozenset((token_hour, token_minute,
2683
token_second)))
2684
token_day = Token(re.compile(r"(\d+)D"),
2685
datetime.timedelta(days=1),
2686
frozenset((token_time, token_end)))
2687
token_month = Token(re.compile(r"(\d+)M"),
2688
datetime.timedelta(weeks=4),
2689
frozenset((token_day, token_end)))
2690
token_year = Token(re.compile(r"(\d+)Y"),
2691
datetime.timedelta(weeks=52),
2692
frozenset((token_month, token_end)))
2693
token_week = Token(re.compile(r"(\d+)W"),
2694
datetime.timedelta(weeks=1),
2695
frozenset((token_end, )))
2696
token_duration = Token(re.compile(r"P"), None,
2697
frozenset((token_year, token_month,
2698
token_day, token_time,
2699
token_week)))
2700
# Define starting values:
2701
# Value so far
2702
value = datetime.timedelta()
2703
found_token = None
2704
# Following valid tokens
2705
followers = frozenset((token_duration, ))
2706
# String left to parse
2707
s = duration
2708
# Loop until end token is found
2709
while found_token is not token_end:
2710
# Search for any currently valid tokens
2711
for token in followers:
2712
match = token.regexp.match(s)
2713
if match is not None:
2714
# Token found
2715
if token.value is not None:
2716
# Value found, parse digits
2717
factor = int(match.group(1), 10)
2718
# Add to value so far
2719
value += factor * token.value
2720
# Strip token from string
2721
s = token.regexp.sub("", s, 1)
2722
# Go to found token
2723
found_token = token
2724
# Set valid next tokens
2725
followers = found_token.followers
2726
break
2727
else:
2728
# No currently valid tokens were found
2729
raise ValueError("Invalid RFC 3339 duration: {!r}"
2730
.format(duration))
2731
# End token found
2732
return value
2733
2734
1599
2735
def string_to_delta(interval):
1600
2736
"""Parse a string and return a datetime.timedelta
1601
2737
1602
2738
>>> string_to_delta('7d')
1603
2739
datetime.timedelta(7)
1604
2740
>>> string_to_delta('60s')
1612
2748
>>> string_to_delta('5m 30s')
1613
2749
datetime.timedelta(0, 330)
1614
2750
"""
2751
2752
try:
2753
return rfc3339_duration_to_delta(interval)
2754
except ValueError:
2755
pass
2756
1615
2757
timevalue = datetime.timedelta(0)
1616
2758
for s in interval.split():
1617
2759
try:
1618
suffix = unicode(s[-1])
2760
suffix = s[-1]
1619
2761
value = int(s[:-1])
1620
2762
if suffix == "d":
1621
2763
delta = datetime.timedelta(value)
1628
2770
elif suffix == "w":
1629
2771
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1630
2772
else:
1631
raise ValueError("Unknown suffix %r" % suffix)
1632
except (ValueError, IndexError) as e:
2773
raise ValueError("Unknown suffix {!r}".format(suffix))
2774
except IndexError as e:
1633
2775
raise ValueError(*(e.args))
1634
2776
timevalue += delta
1635
2777
return timevalue
1636
2778
1637
2779
1638
def if_nametoindex(interface):
1639
"""Call the C function if_nametoindex(), or equivalent
1640
1641
Note: This function cannot accept a unicode string."""
1642
global if_nametoindex
1643
try:
1644
if_nametoindex = (ctypes.cdll.LoadLibrary
1645
(ctypes.util.find_library("c"))
1646
.if_nametoindex)
1647
except (OSError, AttributeError):
1648
logger.warning("Doing if_nametoindex the hard way")
1649
def if_nametoindex(interface):
1650
"Get an interface index the hard way, i.e. using fcntl()"
1651
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1652
with contextlib.closing(socket.socket()) as s:
1653
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1654
struct.pack(str("16s16x"),
1655
interface))
1656
interface_index = struct.unpack(str("I"),
1657
ifreq[16:20])[0]
1658
return interface_index
1659
return if_nametoindex(interface)
1660
1661
1662
def daemon(nochdir = False, noclose = False):
2780
def daemon(nochdir=False, noclose=False):
1663
2781
"""See daemon(3). Standard BSD Unix function.
1664
2782
1665
2783
This should really exist as os.daemon, but it doesn't (yet)."""
1666
2784
if os.fork():
1667
2785
sys.exit()
1672
2790
sys.exit()
1673
2791
if not noclose:
1674
2792
# Close all standard open file descriptors
1675
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2793
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1676
2794
if not stat.S_ISCHR(os.fstat(null).st_mode):
1677
2795
raise OSError(errno.ENODEV,
1678
"%s not a character device"
1679
% os.path.devnull)
2796
"{} not a character device"
2797
.format(os.devnull))
1680
2798
os.dup2(null, sys.stdin.fileno())
1681
2799
os.dup2(null, sys.stdout.fileno())
1682
2800
os.dup2(null, sys.stderr.fileno())
1685
2803
1686
2804
1687
2805
def main():
1688
2806
1689
2807
##################################################################
1690
2808
# Parsing of options, both command line and config file
1691
2809
1692
2810
parser = argparse.ArgumentParser()
1693
2811
parser.add_argument("-v", "--version", action="version",
1694
version = "%%(prog)s %s" % version,
2812
version="%(prog)s {}".format(version),
1695
2813
help="show version number and exit")
1696
2814
parser.add_argument("-i", "--interface", metavar="IF",
1697
2815
help="Bind to interface IF")
1703
2821
help="Run self-test")
1704
2822
parser.add_argument("--debug", action="store_true",
1705
2823
help="Debug mode; run in foreground and log"
1706
" to terminal")
2824
" to terminal", default=None)
1707
2825
parser.add_argument("--debuglevel", metavar="LEVEL",
1708
2826
help="Debug level for stdout output")
1709
2827
parser.add_argument("--priority", help="GnuTLS"
1716
2834
" files")
1717
2835
parser.add_argument("--no-dbus", action="store_false",
1718
2836
dest="use_dbus", help="Do not provide D-Bus"
1719
" system bus interface")
2837
" system bus interface", default=None)
1720
2838
parser.add_argument("--no-ipv6", action="store_false",
1721
dest="use_ipv6", help="Do not use IPv6")
2839
dest="use_ipv6", help="Do not use IPv6",
2840
default=None)
2841
parser.add_argument("--no-restore", action="store_false",
2842
dest="restore", help="Do not restore stored"
2843
" state", default=None)
2844
parser.add_argument("--socket", type=int,
2845
help="Specify a file descriptor to a network"
2846
" socket to use instead of creating one")
2847
parser.add_argument("--statedir", metavar="DIR",
2848
help="Directory to save/restore state in")
2849
parser.add_argument("--foreground", action="store_true",
2850
help="Run in foreground", default=None)
2851
parser.add_argument("--no-zeroconf", action="store_false",
2852
dest="zeroconf", help="Do not use Zeroconf",
2853
default=None)
2854
1722
2855
options = parser.parse_args()
1723
2856
1724
2857
if options.check:
1725
2858
import doctest
1726
doctest.testmod()
1727
sys.exit()
1728
2859
fail_count, test_count = doctest.testmod()
2860
sys.exit(os.EX_OK if fail_count == 0 else 1)
2861
1729
2862
# Default values for config file for server-global settings
1730
server_defaults = { "interface": "",
1731
"address": "",
1732
"port": "",
1733
"debug": "False",
1734
"priority":
1735
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1736
"servicename": "Mandos",
1737
"use_dbus": "True",
1738
"use_ipv6": "True",
1739
"debuglevel": "",
1740
}
1741
2863
server_defaults = {"interface": "",
2864
"address": "",
2865
"port": "",
2866
"debug": "False",
2867
"priority":
2868
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2869
":+SIGN-DSA-SHA256",
2870
"servicename": "Mandos",
2871
"use_dbus": "True",
2872
"use_ipv6": "True",
2873
"debuglevel": "",
2874
"restore": "True",
2875
"socket": "",
2876
"statedir": "/var/lib/mandos",
2877
"foreground": "False",
2878
"zeroconf": "True",
2879
}
2880
1742
2881
# Parse config file for server-global settings
1743
2882
server_config = configparser.SafeConfigParser(server_defaults)
1744
2883
del server_defaults
1745
server_config.read(os.path.join(options.configdir,
1746
"mandos.conf"))
2884
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1747
2885
# Convert the SafeConfigParser object to a dict
1748
2886
server_settings = server_config.defaults()
1749
2887
# Use the appropriate methods on the non-string config options
1750
for option in ("debug", "use_dbus", "use_ipv6"):
2888
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2889
"foreground", "zeroconf"):
1751
2890
server_settings[option] = server_config.getboolean("DEFAULT",
1752
2891
option)
1753
2892
if server_settings["port"]:
1754
2893
server_settings["port"] = server_config.getint("DEFAULT",
1755
2894
"port")
2895
if server_settings["socket"]:
2896
server_settings["socket"] = server_config.getint("DEFAULT",
2897
"socket")
2898
# Later, stdin will, and stdout and stderr might, be dup'ed
2899
# over with an opened os.devnull. But we don't want this to
2900
# happen with a supplied network socket.
2901
if 0 <= server_settings["socket"] <= 2:
2902
server_settings["socket"] = os.dup(server_settings
2903
["socket"])
1756
2904
del server_config
1757
2905
1758
2906
# Override the settings from the config file with command line
1759
2907
# options, if set.
1760
2908
for option in ("interface", "address", "port", "debug",
1761
"priority", "servicename", "configdir",
1762
"use_dbus", "use_ipv6", "debuglevel"):
2909
"priority", "servicename", "configdir", "use_dbus",
2910
"use_ipv6", "debuglevel", "restore", "statedir",
2911
"socket", "foreground", "zeroconf"):
1763
2912
value = getattr(options, option)
1764
2913
if value is not None:
1765
2914
server_settings[option] = value
1766
2915
del options
1767
2916
# Force all strings to be unicode
1768
2917
for option in server_settings.keys():
1769
if type(server_settings[option]) is str:
1770
server_settings[option] = unicode(server_settings[option])
2918
if isinstance(server_settings[option], bytes):
2919
server_settings[option] = (server_settings[option]
2920
.decode("utf-8"))
2921
# Force all boolean options to be boolean
2922
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2923
"foreground", "zeroconf"):
2924
server_settings[option] = bool(server_settings[option])
2925
# Debug implies foreground
2926
if server_settings["debug"]:
2927
server_settings["foreground"] = True
1771
2928
# Now we have our good server settings in "server_settings"
1772
2929
1773
2930
##################################################################
1774
2931
2932
if (not server_settings["zeroconf"]
2933
and not (server_settings["port"]
2934
or server_settings["socket"] != "")):
2935
parser.error("Needs port or socket to work without Zeroconf")
2936
1775
2937
# For convenience
1776
2938
debug = server_settings["debug"]
1777
2939
debuglevel = server_settings["debuglevel"]
1778
2940
use_dbus = server_settings["use_dbus"]
1779
2941
use_ipv6 = server_settings["use_ipv6"]
1780
2942
stored_state_path = os.path.join(server_settings["statedir"],
2943
stored_state_file)
2944
foreground = server_settings["foreground"]
2945
zeroconf = server_settings["zeroconf"]
2946
2947
if debug:
2948
initlogger(debug, logging.DEBUG)
2949
else:
2950
if not debuglevel:
2951
initlogger(debug)
2952
else:
2953
level = getattr(logging, debuglevel.upper())
2954
initlogger(debug, level)
2955
1781
2956
if server_settings["servicename"] != "Mandos":
1782
syslogger.setFormatter(logging.Formatter
1783
('Mandos (%s) [%%(process)d]:'
1784
' %%(levelname)s: %%(message)s'
1785
% server_settings["servicename"]))
1786
2957
syslogger.setFormatter(
2958
logging.Formatter('Mandos ({}) [%(process)d]:'
2959
' %(levelname)s: %(message)s'.format(
2960
server_settings["servicename"])))
2961
1787
2962
# Parse config file with clients
1788
client_defaults = { "timeout": "5m",
1789
"extended_timeout": "15m",
1790
"interval": "2m",
1791
"checker": "fping -q -- %%(host)s",
1792
"host": "",
1793
"approval_delay": "0s",
1794
"approval_duration": "1s",
1795
}
1796
client_config = configparser.SafeConfigParser(client_defaults)
2963
client_config = configparser.SafeConfigParser(Client
2964
.client_defaults)
1797
2965
client_config.read(os.path.join(server_settings["configdir"],
1798
2966
"clients.conf"))
1799
2967
1800
2968
global mandos_dbus_service
1801
2969
mandos_dbus_service = None
1802
1803
tcp_server = MandosServer((server_settings["address"],
1804
server_settings["port"]),
1805
ClientHandler,
1806
interface=(server_settings["interface"]
1807
or None),
1808
use_ipv6=use_ipv6,
1809
gnutls_priority=
1810
server_settings["priority"],
1811
use_dbus=use_dbus)
1812
if not debug:
1813
pidfilename = "/var/run/mandos.pid"
1814
try:
1815
pidfile = open(pidfilename, "w")
1816
except IOError:
1817
logger.error("Could not open file %r", pidfilename)
1818
1819
try:
1820
uid = pwd.getpwnam("_mandos").pw_uid
1821
gid = pwd.getpwnam("_mandos").pw_gid
1822
except KeyError:
1823
try:
1824
uid = pwd.getpwnam("mandos").pw_uid
1825
gid = pwd.getpwnam("mandos").pw_gid
2970
2971
socketfd = None
2972
if server_settings["socket"] != "":
2973
socketfd = server_settings["socket"]
2974
tcp_server = MandosServer(
2975
(server_settings["address"], server_settings["port"]),
2976
ClientHandler,
2977
interface=(server_settings["interface"] or None),
2978
use_ipv6=use_ipv6,
2979
gnutls_priority=server_settings["priority"],
2980
use_dbus=use_dbus,
2981
socketfd=socketfd)
2982
if not foreground:
2983
pidfilename = "/run/mandos.pid"
2984
if not os.path.isdir("/run/."):
2985
pidfilename = "/var/run/mandos.pid"
2986
pidfile = None
2987
try:
2988
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
2989
except IOError as e:
2990
logger.error("Could not open file %r", pidfilename,
2991
exc_info=e)
2992
2993
for name, group in (("_mandos", "_mandos"),
2994
("mandos", "mandos"),
2995
("nobody", "nogroup")):
2996
try:
2997
uid = pwd.getpwnam(name).pw_uid
2998
gid = pwd.getpwnam(group).pw_gid
2999
break
1826
3000
except KeyError:
1827
try:
1828
uid = pwd.getpwnam("nobody").pw_uid
1829
gid = pwd.getpwnam("nobody").pw_gid
1830
except KeyError:
1831
uid = 65534
1832
gid = 65534
3001
continue
3002
else:
3003
uid = 65534
3004
gid = 65534
1833
3005
try:
1834
3006
os.setgid(gid)
1835
3007
os.setuid(uid)
3008
if debug:
3009
logger.debug("Did setuid/setgid to {}:{}".format(uid,
3010
gid))
1836
3011
except OSError as error:
1837
if error[0] != errno.EPERM:
1838
raise error
1839
1840
if not debug and not debuglevel:
1841
syslogger.setLevel(logging.WARNING)
1842
console.setLevel(logging.WARNING)
1843
if debuglevel:
1844
level = getattr(logging, debuglevel.upper())
1845
syslogger.setLevel(level)
1846
console.setLevel(level)
1847
3012
logger.warning("Failed to setuid/setgid to {}:{}: {}"
3013
.format(uid, gid, os.strerror(error.errno)))
3014
if error.errno != errno.EPERM:
3015
raise
3016
1848
3017
if debug:
1849
3018
# Enable all possible GnuTLS debugging
1850
3019
1851
3020
# "Use a log level over 10 to enable all debugging options."
1852
3021
# - GnuTLS manual
1853
gnutls.library.functions.gnutls_global_set_log_level(11)
1854
1855
@gnutls.library.types.gnutls_log_func
3022
gnutls.global_set_log_level(11)
3023
3024
@gnutls.log_func
1856
3025
def debug_gnutls(level, string):
1857
3026
logger.debug("GnuTLS: %s", string[:-1])
1858
1859
(gnutls.library.functions
1860
.gnutls_global_set_log_function(debug_gnutls))
1861
3027
3028
gnutls.global_set_log_function(debug_gnutls)
3029
1862
3030
# Redirect stdin so all checkers get /dev/null
1863
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
3031
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1864
3032
os.dup2(null, sys.stdin.fileno())
1865
3033
if null > 2:
1866
3034
os.close(null)
1867
else:
1868
# No console logging
1869
logger.removeHandler(console)
1870
3035
1871
3036
# Need to fork before connecting to D-Bus
1872
if not debug:
3037
if not foreground:
1873
3038
# Close all input and output, do double fork, etc.
1874
3039
daemon()
1875
3040
3041
# multiprocessing will use threads, so before we use GLib we need
3042
# to inform GLib that threads will be used.
3043
GLib.threads_init()
3044
1876
3045
global main_loop
1877
3046
# From the Avahi example code
1878
DBusGMainLoop(set_as_default=True )
1879
main_loop = gobject.MainLoop()
3047
DBusGMainLoop(set_as_default=True)
3048
main_loop = GLib.MainLoop()
1880
3049
bus = dbus.SystemBus()
1881
3050
# End of Avahi example code
1882
3051
if use_dbus:
1883
3052
try:
1884
bus_name = dbus.service.BusName("se.bsnet.fukt.Mandos",
1885
bus, do_not_queue=True)
1886
except dbus.exceptions.NameExistsException as e:
1887
logger.error(unicode(e) + ", disabling D-Bus")
3053
bus_name = dbus.service.BusName("se.recompile.Mandos",
3054
bus,
3055
do_not_queue=True)
3056
old_bus_name = dbus.service.BusName(
3057
"se.bsnet.fukt.Mandos", bus,
3058
do_not_queue=True)
3059
except dbus.exceptions.DBusException as e:
3060
logger.error("Disabling D-Bus:", exc_info=e)
1888
3061
use_dbus = False
1889
3062
server_settings["use_dbus"] = False
1890
3063
tcp_server.use_dbus = False
1891
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1892
service = AvahiService(name = server_settings["servicename"],
1893
servicetype = "_mandos._tcp",
1894
protocol = protocol, bus = bus)
1895
if server_settings["interface"]:
1896
service.interface = (if_nametoindex
1897
(str(server_settings["interface"])))
1898
3064
if zeroconf:
3065
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3066
service = AvahiServiceToSyslog(
3067
name=server_settings["servicename"],
3068
servicetype="_mandos._tcp",
3069
protocol=protocol,
3070
bus=bus)
3071
if server_settings["interface"]:
3072
service.interface = if_nametoindex(
3073
server_settings["interface"].encode("utf-8"))
3074
1899
3075
global multiprocessing_manager
1900
3076
multiprocessing_manager = multiprocessing.Manager()
1901
3077
1902
3078
client_class = Client
1903
3079
if use_dbus:
1904
client_class = functools.partial(ClientDBus, bus = bus)
1905
def client_config_items(config, section):
1906
special_settings = {
1907
"approved_by_default":
1908
lambda: config.getboolean(section,
1909
"approved_by_default"),
1910
}
1911
for name, value in config.items(section):
3080
client_class = functools.partial(ClientDBus, bus=bus)
3081
3082
client_settings = Client.config_parser(client_config)
3083
old_client_settings = {}
3084
clients_data = {}
3085
3086
# This is used to redirect stdout and stderr for checker processes
3087
global wnull
3088
wnull = open(os.devnull, "w") # A writable /dev/null
3089
# Only used if server is running in foreground but not in debug
3090
# mode
3091
if debug or not foreground:
3092
wnull.close()
3093
3094
# Get client data and settings from last running state.
3095
if server_settings["restore"]:
3096
try:
3097
with open(stored_state_path, "rb") as stored_state:
3098
if sys.version_info.major == 2:
3099
clients_data, old_client_settings = pickle.load(
3100
stored_state)
3101
else:
3102
bytes_clients_data, bytes_old_client_settings = (
3103
pickle.load(stored_state, encoding="bytes"))
3104
# Fix bytes to strings
3105
# clients_data
3106
# .keys()
3107
clients_data = {(key.decode("utf-8")
3108
if isinstance(key, bytes)
3109
else key): value
3110
for key, value in
3111
bytes_clients_data.items()}
3112
del bytes_clients_data
3113
for key in clients_data:
3114
value = {(k.decode("utf-8")
3115
if isinstance(k, bytes) else k): v
3116
for k, v in
3117
clients_data[key].items()}
3118
clients_data[key] = value
3119
# .client_structure
3120
value["client_structure"] = [
3121
(s.decode("utf-8")
3122
if isinstance(s, bytes)
3123
else s) for s in
3124
value["client_structure"]]
3125
# .name & .host
3126
for k in ("name", "host"):
3127
if isinstance(value[k], bytes):
3128
value[k] = value[k].decode("utf-8")
3129
# old_client_settings
3130
# .keys()
3131
old_client_settings = {
3132
(key.decode("utf-8")
3133
if isinstance(key, bytes)
3134
else key): value
3135
for key, value in
3136
bytes_old_client_settings.items()}
3137
del bytes_old_client_settings
3138
# .host
3139
for value in old_client_settings.values():
3140
if isinstance(value["host"], bytes):
3141
value["host"] = (value["host"]
3142
.decode("utf-8"))
3143
os.remove(stored_state_path)
3144
except IOError as e:
3145
if e.errno == errno.ENOENT:
3146
logger.warning("Could not load persistent state:"
3147
" {}".format(os.strerror(e.errno)))
3148
else:
3149
logger.critical("Could not load persistent state:",
3150
exc_info=e)
3151
raise
3152
except EOFError as e:
3153
logger.warning("Could not load persistent state: "
3154
"EOFError:",
3155
exc_info=e)
3156
3157
with PGPEngine() as pgp:
3158
for client_name, client in clients_data.items():
3159
# Skip removed clients
3160
if client_name not in client_settings:
3161
continue
3162
3163
# Decide which value to use after restoring saved state.
3164
# We have three different values: Old config file,
3165
# new config file, and saved state.
3166
# New config value takes precedence if it differs from old
3167
# config value, otherwise use saved state.
3168
for name, value in client_settings[client_name].items():
3169
try:
3170
# For each value in new config, check if it
3171
# differs from the old config value (Except for
3172
# the "secret" attribute)
3173
if (name != "secret"
3174
and (value !=
3175
old_client_settings[client_name][name])):
3176
client[name] = value
3177
except KeyError:
3178
pass
3179
3180
# Clients who has passed its expire date can still be
3181
# enabled if its last checker was successful. A Client
3182
# whose checker succeeded before we stored its state is
3183
# assumed to have successfully run all checkers during
3184
# downtime.
3185
if client["enabled"]:
3186
if datetime.datetime.utcnow() >= client["expires"]:
3187
if not client["last_checked_ok"]:
3188
logger.warning(
3189
"disabling client {} - Client never "
3190
"performed a successful checker".format(
3191
client_name))
3192
client["enabled"] = False
3193
elif client["last_checker_status"] != 0:
3194
logger.warning(
3195
"disabling client {} - Client last"
3196
" checker failed with error code"
3197
" {}".format(
3198
client_name,
3199
client["last_checker_status"]))
3200
client["enabled"] = False
3201
else:
3202
client["expires"] = (
3203
datetime.datetime.utcnow()
3204
+ client["timeout"])
3205
logger.debug("Last checker succeeded,"
3206
" keeping {} enabled".format(
3207
client_name))
1912
3208
try:
1913
yield (name, special_settings[name]())
1914
except KeyError:
1915
yield (name, value)
1916
1917
tcp_server.clients.update(set(
1918
client_class(name = section,
1919
config= dict(client_config_items(
1920
client_config, section)))
1921
for section in client_config.sections()))
3209
client["secret"] = pgp.decrypt(
3210
client["encrypted_secret"],
3211
client_settings[client_name]["secret"])
3212
except PGPError:
3213
# If decryption fails, we use secret from new settings
3214
logger.debug("Failed to decrypt {} old secret".format(
3215
client_name))
3216
client["secret"] = (client_settings[client_name]
3217
["secret"])
3218
3219
# Add/remove clients based on new changes made to config
3220
for client_name in (set(old_client_settings)
3221
- set(client_settings)):
3222
del clients_data[client_name]
3223
for client_name in (set(client_settings)
3224
- set(old_client_settings)):
3225
clients_data[client_name] = client_settings[client_name]
3226
3227
# Create all client objects
3228
for client_name, client in clients_data.items():
3229
tcp_server.clients[client_name] = client_class(
3230
name=client_name,
3231
settings=client,
3232
server_settings=server_settings)
3233
1922
3234
if not tcp_server.clients:
1923
3235
logger.warning("No clients defined")
1924
1925
if not debug:
1926
try:
1927
with pidfile:
1928
pid = os.getpid()
1929
pidfile.write(str(pid) + "\n".encode("utf-8"))
1930
del pidfile
1931
except IOError:
1932
logger.error("Could not write to file %r with PID %d",
1933
pidfilename, pid)
1934
except NameError:
1935
# "pidfile" was never created
1936
pass
3236
3237
if not foreground:
3238
if pidfile is not None:
3239
pid = os.getpid()
3240
try:
3241
with pidfile:
3242
print(pid, file=pidfile)
3243
except IOError:
3244
logger.error("Could not write to file %r with PID %d",
3245
pidfilename, pid)
3246
del pidfile
1937
3247
del pidfilename
1938
1939
signal.signal(signal.SIGINT, signal.SIG_IGN)
1940
1941
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1942
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1943
3248
3249
for termsig in (signal.SIGHUP, signal.SIGTERM):
3250
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3251
lambda: main_loop.quit() and False)
3252
1944
3253
if use_dbus:
1945
class MandosDBusService(dbus.service.Object):
3254
3255
@alternate_dbus_interfaces(
3256
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3257
class MandosDBusService(DBusObjectWithObjectManager):
1946
3258
"""A D-Bus proxy object"""
3259
1947
3260
def __init__(self):
1948
3261
dbus.service.Object.__init__(self, bus, "/")
1949
_interface = "se.bsnet.fukt.Mandos"
1950
3262
3263
_interface = "se.recompile.Mandos"
3264
1951
3265
@dbus.service.signal(_interface, signature="o")
1952
3266
def ClientAdded(self, objpath):
1953
3267
"D-Bus signal"
1954
3268
pass
1955
3269
1956
3270
@dbus.service.signal(_interface, signature="ss")
1957
3271
def ClientNotFound(self, fingerprint, address):
1958
3272
"D-Bus signal"
1959
3273
pass
1960
3274
3275
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3276
"true"})
1961
3277
@dbus.service.signal(_interface, signature="os")
1962
3278
def ClientRemoved(self, objpath, name):
1963
3279
"D-Bus signal"
1964
3280
pass
1965
3281
3282
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3283
"true"})
1966
3284
@dbus.service.method(_interface, out_signature="ao")
1967
3285
def GetAllClients(self):
1968
3286
"D-Bus method"
1969
return dbus.Array(c.dbus_object_path
1970
for c in tcp_server.clients)
1971
3287
return dbus.Array(c.dbus_object_path for c in
3288
tcp_server.clients.values())
3289
3290
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3291
"true"})
1972
3292
@dbus.service.method(_interface,
1973
3293
out_signature="a{oa{sv}}")
1974
3294
def GetAllClientsWithProperties(self):
1975
3295
"D-Bus method"
1976
3296
return dbus.Dictionary(
1977
((c.dbus_object_path, c.GetAll(""))
1978
for c in tcp_server.clients),
3297
{c.dbus_object_path: c.GetAll(
3298
"se.recompile.Mandos.Client")
3299
for c in tcp_server.clients.values()},
1979
3300
signature="oa{sv}")
1980
3301
1981
3302
@dbus.service.method(_interface, in_signature="o")
1982
3303
def RemoveClient(self, object_path):
1983
3304
"D-Bus method"
1984
for c in tcp_server.clients:
3305
for c in tcp_server.clients.values():
1985
3306
if c.dbus_object_path == object_path:
1986
tcp_server.clients.remove(c)
3307
del tcp_server.clients[c.name]
1987
3308
c.remove_from_connection()
1988
# Don't signal anything except ClientRemoved
3309
# Don't signal the disabling
1989
3310
c.disable(quiet=True)
1990
# Emit D-Bus signal
1991
self.ClientRemoved(object_path, c.name)
3311
# Emit D-Bus signal for removal
3312
self.client_removed_signal(c)
1992
3313
return
1993
3314
raise KeyError(object_path)
1994
3315
1995
3316
del _interface
1996
3317
3318
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3319
out_signature="a{oa{sa{sv}}}")
3320
def GetManagedObjects(self):
3321
"""D-Bus method"""
3322
return dbus.Dictionary(
3323
{client.dbus_object_path:
3324
dbus.Dictionary(
3325
{interface: client.GetAll(interface)
3326
for interface in
3327
client._get_all_interface_names()})
3328
for client in tcp_server.clients.values()})
3329
3330
def client_added_signal(self, client):
3331
"""Send the new standard signal and the old signal"""
3332
if use_dbus:
3333
# New standard signal
3334
self.InterfacesAdded(
3335
client.dbus_object_path,
3336
dbus.Dictionary(
3337
{interface: client.GetAll(interface)
3338
for interface in
3339
client._get_all_interface_names()}))
3340
# Old signal
3341
self.ClientAdded(client.dbus_object_path)
3342
3343
def client_removed_signal(self, client):
3344
"""Send the new standard signal and the old signal"""
3345
if use_dbus:
3346
# New standard signal
3347
self.InterfacesRemoved(
3348
client.dbus_object_path,
3349
client._get_all_interface_names())
3350
# Old signal
3351
self.ClientRemoved(client.dbus_object_path,
3352
client.name)
3353
1997
3354
mandos_dbus_service = MandosDBusService()
1998
3355
3356
# Save modules to variables to exempt the modules from being
3357
# unloaded before the function registered with atexit() is run.
3358
mp = multiprocessing
3359
wn = wnull
3360
1999
3361
def cleanup():
2000
3362
"Cleanup function; run on exit"
2001
service.cleanup()
2002
3363
if zeroconf:
3364
service.cleanup()
3365
3366
mp.active_children()
3367
wn.close()
3368
if not (tcp_server.clients or client_settings):
3369
return
3370
3371
# Store client before exiting. Secrets are encrypted with key
3372
# based on what config file has. If config file is
3373
# removed/edited, old secret will thus be unrecovable.
3374
clients = {}
3375
with PGPEngine() as pgp:
3376
for client in tcp_server.clients.values():
3377
key = client_settings[client.name]["secret"]
3378
client.encrypted_secret = pgp.encrypt(client.secret,
3379
key)
3380
client_dict = {}
3381
3382
# A list of attributes that can not be pickled
3383
# + secret.
3384
exclude = {"bus", "changedstate", "secret",
3385
"checker", "server_settings"}
3386
for name, typ in inspect.getmembers(dbus.service
3387
.Object):
3388
exclude.add(name)
3389
3390
client_dict["encrypted_secret"] = (client
3391
.encrypted_secret)
3392
for attr in client.client_structure:
3393
if attr not in exclude:
3394
client_dict[attr] = getattr(client, attr)
3395
3396
clients[client.name] = client_dict
3397
del client_settings[client.name]["secret"]
3398
3399
try:
3400
with tempfile.NamedTemporaryFile(
3401
mode='wb',
3402
suffix=".pickle",
3403
prefix='clients-',
3404
dir=os.path.dirname(stored_state_path),
3405
delete=False) as stored_state:
3406
pickle.dump((clients, client_settings), stored_state,
3407
protocol=2)
3408
tempname = stored_state.name
3409
os.rename(tempname, stored_state_path)
3410
except (IOError, OSError) as e:
3411
if not debug:
3412
try:
3413
os.remove(tempname)
3414
except NameError:
3415
pass
3416
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
3417
logger.warning("Could not save persistent state: {}"
3418
.format(os.strerror(e.errno)))
3419
else:
3420
logger.warning("Could not save persistent state:",
3421
exc_info=e)
3422
raise
3423
3424
# Delete all clients, and settings from config
2003
3425
while tcp_server.clients:
2004
client = tcp_server.clients.pop()
3426
name, client = tcp_server.clients.popitem()
2005
3427
if use_dbus:
2006
3428
client.remove_from_connection()
2007
client.disable_hook = None
2008
# Don't signal anything except ClientRemoved
3429
# Don't signal the disabling
2009
3430
client.disable(quiet=True)
3431
# Emit D-Bus signal for removal
2010
3432
if use_dbus:
2011
# Emit D-Bus signal
2012
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
2013
client.name)
2014
3433
mandos_dbus_service.client_removed_signal(client)
3434
client_settings.clear()
3435
2015
3436
atexit.register(cleanup)
2016
2017
for client in tcp_server.clients:
3437
3438
for client in tcp_server.clients.values():
2018
3439
if use_dbus:
2019
# Emit D-Bus signal
2020
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2021
client.enable()
2022
3440
# Emit D-Bus signal for adding
3441
mandos_dbus_service.client_added_signal(client)
3442
# Need to initiate checking of clients
3443
if client.enabled:
3444
client.init_checker()
3445
2023
3446
tcp_server.enable()
2024
3447
tcp_server.server_activate()
2025
3448
2026
3449
# Find out what port we got
2027
service.port = tcp_server.socket.getsockname()[1]
3450
if zeroconf:
3451
service.port = tcp_server.socket.getsockname()[1]
2028
3452
if use_ipv6:
2029
3453
logger.info("Now listening on address %r, port %d,"
2030
" flowinfo %d, scope_id %d"
2031
% tcp_server.socket.getsockname())
3454
" flowinfo %d, scope_id %d",
3455
*tcp_server.socket.getsockname())
2032
3456
else: # IPv4
2033
logger.info("Now listening on address %r, port %d"
2034
% tcp_server.socket.getsockname())
2035
2036
#service.interface = tcp_server.socket.getsockname()[3]
2037
3457
logger.info("Now listening on address %r, port %d",
3458
*tcp_server.socket.getsockname())
3459
3460
# service.interface = tcp_server.socket.getsockname()[3]
3461
2038
3462
try:
2039
# From the Avahi example code
2040
try:
2041
service.activate()
2042
except dbus.exceptions.DBusException as error:
2043
logger.critical("DBusException: %s", error)
2044
cleanup()
2045
sys.exit(1)
2046
# End of Avahi example code
2047
2048
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2049
lambda *args, **kwargs:
2050
(tcp_server.handle_request
2051
(*args[2:], **kwargs) or True))
2052
3463
if zeroconf:
3464
# From the Avahi example code
3465
try:
3466
service.activate()
3467
except dbus.exceptions.DBusException as error:
3468
logger.critical("D-Bus Exception", exc_info=error)
3469
cleanup()
3470
sys.exit(1)
3471
# End of Avahi example code
3472
3473
GLib.io_add_watch(tcp_server.fileno(), GLib.IO_IN,
3474
lambda *args, **kwargs:
3475
(tcp_server.handle_request
3476
(*args[2:], **kwargs) or True))
3477
2053
3478
logger.debug("Starting main loop")
2054
3479
main_loop.run()
2055
3480
except AvahiError as error:
2056
logger.critical("AvahiError: %s", error)
3481
logger.critical("Avahi Error", exc_info=error)
2057
3482
cleanup()
2058
3483
sys.exit(1)
2059
3484
except KeyboardInterrupt:
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0