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- Committer: Teddy Hogeborn
- Date: 2019-02-11 11:59:08 UTC
- mfrom: (237.4.110 release)
- Revision ID: teddy@recompile.se-20190211115908-xu166gaay21j3coa
Merge from release branch
- files added:
- bugs.xml
- debian/upstream
- network-hooks.d
- plugin-helpers
- files removed:
- initramfs-tools-hook-conf
- files modified:
- .bzrignore
added
removed
mandos
1
1
#!/usr/bin/python
2
2
# -*- mode: python; coding: utf-8 -*-
3
#
3
#
4
4
# Mandos server - give out binary blobs to connecting clients.
5
#
5
#
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6
# This program is partly derived from an example program for an Avahi
7
7
# service publisher, downloaded from
8
8
# <http://avahi.org/wiki/PythonPublishExample>. This includes the
9
9
# methods "add", "remove", "server_state_changed",
10
10
# "entry_group_state_changed", "cleanup", and "activate" in the
11
11
# "AvahiService" class, and some lines in "main".
12
#
12
#
13
13
# Everything else is
14
# Copyright © 2008-2011 Teddy Hogeborn
15
# Copyright © 2008-2011 Björn Påhlsson
16
#
17
# This program is free software: you can redistribute it and/or modify
18
# it under the terms of the GNU General Public License as published by
14
# Copyright © 2008-2019 Teddy Hogeborn
15
# Copyright © 2008-2019 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
#
30
# along with Mandos. If not, see <http://www.gnu.org/licenses/>.
31
#
31
32
# Contact the authors at <mandos@recompile.se>.
32
#
33
#
33
34
34
35
from __future__ import (division, absolute_import, print_function,
35
36
unicode_literals)
36
37
37
import SocketServer as socketserver
38
try:
39
from future_builtins import *
40
except ImportError:
41
pass
42
43
try:
44
import SocketServer as socketserver
45
except ImportError:
46
import socketserver
38
47
import socket
39
48
import argparse
40
49
import datetime
41
50
import errno
42
import gnutls.crypto
43
import gnutls.connection
44
import gnutls.errors
45
import gnutls.library.functions
46
import gnutls.library.constants
47
import gnutls.library.types
48
import ConfigParser as configparser
51
try:
52
import ConfigParser as configparser
53
except ImportError:
54
import configparser
49
55
import sys
50
56
import re
51
57
import os
60
66
import struct
61
67
import fcntl
62
68
import functools
63
import cPickle as pickle
69
try:
70
import cPickle as pickle
71
except ImportError:
72
import pickle
64
73
import multiprocessing
65
74
import types
75
import binascii
76
import tempfile
77
import itertools
78
import collections
79
import codecs
66
80
67
81
import dbus
68
82
import dbus.service
69
import gobject
70
import avahi
83
from gi.repository import GLib
71
84
from dbus.mainloop.glib import DBusGMainLoop
72
85
import ctypes
73
86
import ctypes.util
74
87
import xml.dom.minidom
75
88
import inspect
76
89
90
# Try to find the value of SO_BINDTODEVICE:
77
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:
78
94
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
79
95
except AttributeError:
80
96
try:
97
# This is where SO_BINDTODEVICE was up to and including Python
98
# 2.6, and also 3.2:
81
99
from IN import SO_BINDTODEVICE
82
100
except ImportError:
83
SO_BINDTODEVICE = None
84
85
86
version = "1.3.1"
87
88
#logger = logging.getLogger('mandos')
89
logger = logging.Logger('mandos')
90
syslogger = (logging.handlers.SysLogHandler
91
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
92
address = str("/dev/log")))
93
syslogger.setFormatter(logging.Formatter
94
('Mandos [%(process)d]: %(levelname)s:'
95
' %(message)s'))
96
logger.addHandler(syslogger)
97
98
console = logging.StreamHandler()
99
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
100
' %(levelname)s:'
101
' %(message)s'))
102
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 = "1.8.3"
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
103
303
104
304
class AvahiError(Exception):
105
305
def __init__(self, value, *args, **kwargs):
106
306
self.value = value
107
super(AvahiError, self).__init__(value, *args, **kwargs)
108
def __unicode__(self):
109
return unicode(repr(self.value))
307
return super(AvahiError, self).__init__(value, *args,
308
**kwargs)
309
110
310
111
311
class AvahiServiceError(AvahiError):
112
312
pass
113
313
314
114
315
class AvahiGroupError(AvahiError):
115
316
pass
116
317
117
318
118
319
class AvahiService(object):
119
320
"""An Avahi (Zeroconf) service.
120
321
121
322
Attributes:
122
323
interface: integer; avahi.IF_UNSPEC or an interface index.
123
324
Used to optionally bind to the specified interface.
124
325
name: string; Example: 'Mandos'
125
326
type: string; Example: '_mandos._tcp'.
126
See <http://www.dns-sd.org/ServiceTypes.html>
327
See <https://www.iana.org/assignments/service-names-port-numbers>
127
328
port: integer; what port to announce
128
329
TXT: list of strings; TXT record for the service
129
330
domain: string; Domain to publish on, default to .local if empty.
135
336
server: D-Bus Server
136
337
bus: dbus.SystemBus()
137
338
"""
138
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
139
servicetype = None, port = None, TXT = None,
140
domain = "", host = "", max_renames = 32768,
141
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):
142
351
self.interface = interface
143
352
self.name = name
144
353
self.type = servicetype
153
362
self.server = None
154
363
self.bus = bus
155
364
self.entry_group_state_changed_match = None
156
def rename(self):
365
366
def rename(self, remove=True):
157
367
"""Derived from the Avahi example code"""
158
368
if self.rename_count >= self.max_renames:
159
369
logger.critical("No suitable Zeroconf service name found"
160
370
" after %i retries, exiting.",
161
371
self.rename_count)
162
372
raise AvahiServiceError("Too many renames")
163
self.name = unicode(self.server
164
.GetAlternativeServiceName(self.name))
373
self.name = str(
374
self.server.GetAlternativeServiceName(self.name))
375
self.rename_count += 1
165
376
logger.info("Changing Zeroconf service name to %r ...",
166
377
self.name)
167
syslogger.setFormatter(logging.Formatter
168
('Mandos (%s) [%%(process)d]:'
169
' %%(levelname)s: %%(message)s'
170
% self.name))
171
self.remove()
378
if remove:
379
self.remove()
172
380
try:
173
381
self.add()
174
382
except dbus.exceptions.DBusException as error:
175
logger.critical("DBusException: %s", error)
176
self.cleanup()
177
os._exit(1)
178
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
179
392
def remove(self):
180
393
"""Derived from the Avahi example code"""
181
394
if self.entry_group_state_changed_match is not None:
183
396
self.entry_group_state_changed_match = None
184
397
if self.group is not None:
185
398
self.group.Reset()
399
186
400
def add(self):
187
401
"""Derived from the Avahi example code"""
188
402
self.remove()
193
407
avahi.DBUS_INTERFACE_ENTRY_GROUP)
194
408
self.entry_group_state_changed_match = (
195
409
self.group.connect_to_signal(
196
'StateChanged', self .entry_group_state_changed))
410
'StateChanged', self.entry_group_state_changed))
197
411
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
198
412
self.name, self.type)
199
413
self.group.AddService(
205
419
dbus.UInt16(self.port),
206
420
avahi.string_array_to_txt_array(self.TXT))
207
421
self.group.Commit()
422
208
423
def entry_group_state_changed(self, state, error):
209
424
"""Derived from the Avahi example code"""
210
425
logger.debug("Avahi entry group state change: %i", state)
211
426
212
427
if state == avahi.ENTRY_GROUP_ESTABLISHED:
213
428
logger.debug("Zeroconf service established.")
214
429
elif state == avahi.ENTRY_GROUP_COLLISION:
216
431
self.rename()
217
432
elif state == avahi.ENTRY_GROUP_FAILURE:
218
433
logger.critical("Avahi: Error in group state changed %s",
219
unicode(error))
220
raise AvahiGroupError("State changed: %s"
221
% unicode(error))
434
str(error))
435
raise AvahiGroupError("State changed: {!s}".format(error))
436
222
437
def cleanup(self):
223
438
"""Derived from the Avahi example code"""
224
439
if self.group is not None:
225
440
try:
226
441
self.group.Free()
227
442
except (dbus.exceptions.UnknownMethodException,
228
dbus.exceptions.DBusException) as e:
443
dbus.exceptions.DBusException):
229
444
pass
230
445
self.group = None
231
446
self.remove()
447
232
448
def server_state_changed(self, state, error=None):
233
449
"""Derived from the Avahi example code"""
234
450
logger.debug("Avahi server state change: %i", state)
235
bad_states = { avahi.SERVER_INVALID:
236
"Zeroconf server invalid",
237
avahi.SERVER_REGISTERING: None,
238
avahi.SERVER_COLLISION:
239
"Zeroconf server name collision",
240
avahi.SERVER_FAILURE:
241
"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
}
242
457
if state in bad_states:
243
458
if bad_states[state] is not None:
244
459
if error is None:
247
462
logger.error(bad_states[state] + ": %r", error)
248
463
self.cleanup()
249
464
elif state == avahi.SERVER_RUNNING:
250
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)
251
477
else:
252
478
if error is None:
253
479
logger.debug("Unknown state: %r", state)
254
480
else:
255
481
logger.debug("Unknown state: %r: %r", state, error)
482
256
483
def activate(self):
257
484
"""Derived from the Avahi example code"""
258
485
if self.server is None:
262
489
follow_name_owner_changes=True),
263
490
avahi.DBUS_INTERFACE_SERVER)
264
491
self.server.connect_to_signal("StateChanged",
265
self.server_state_changed)
492
self.server_state_changed)
266
493
self.server_state_changed(self.server.GetState())
267
494
268
495
269
def _timedelta_to_milliseconds(td):
270
"Convert a datetime.timedelta() to milliseconds"
271
return ((td.days * 24 * 60 * 60 * 1000)
272
+ (td.seconds * 1000)
273
+ (td.microseconds // 1000))
274
496
class AvahiServiceToSyslog(AvahiService):
497
def rename(self, *args, **kwargs):
498
"""Add the new name to the syslog messages"""
499
ret = super(AvahiServiceToSyslog, self).rename(*args, **kwargs)
500
syslogger.setFormatter(logging.Formatter(
501
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
502
.format(self.name)))
503
return ret
504
505
506
# Pretend that we have a GnuTLS module
507
class GnuTLS(object):
508
"""This isn't so much a class as it is a module-like namespace.
509
It is instantiated once, and simulates having a GnuTLS module."""
510
511
library = ctypes.util.find_library("gnutls")
512
if library is None:
513
library = ctypes.util.find_library("gnutls-deb0")
514
_library = ctypes.cdll.LoadLibrary(library)
515
del library
516
_need_version = b"3.3.0"
517
_tls_rawpk_version = b"3.6.6"
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
CRT_RAWPK = 3
535
CLIENT = 2
536
SHUT_RDWR = 0
537
CRD_CERTIFICATE = 1
538
E_NO_CERTIFICATE_FOUND = -49
539
X509_FMT_DER = 0
540
NO_TICKETS = 1<<10
541
ENABLE_RAWPK = 1<<18
542
CTYPE_PEERS = 3
543
KEYID_USE_SHA256 = 1 # gnutls/x509.h
544
OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
545
546
# Types
547
class session_int(ctypes.Structure):
548
_fields_ = []
549
session_t = ctypes.POINTER(session_int)
550
551
class certificate_credentials_st(ctypes.Structure):
552
_fields_ = []
553
certificate_credentials_t = ctypes.POINTER(
554
certificate_credentials_st)
555
certificate_type_t = ctypes.c_int
556
557
class datum_t(ctypes.Structure):
558
_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
559
('size', ctypes.c_uint)]
560
561
class openpgp_crt_int(ctypes.Structure):
562
_fields_ = []
563
openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
564
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
565
log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
566
credentials_type_t = ctypes.c_int
567
transport_ptr_t = ctypes.c_void_p
568
close_request_t = ctypes.c_int
569
570
# Exceptions
571
class Error(Exception):
572
# We need to use the class name "GnuTLS" here, since this
573
# exception might be raised from within GnuTLS.__init__,
574
# which is called before the assignment to the "gnutls"
575
# global variable has happened.
576
def __init__(self, message=None, code=None, args=()):
577
# Default usage is by a message string, but if a return
578
# code is passed, convert it to a string with
579
# gnutls.strerror()
580
self.code = code
581
if message is None and code is not None:
582
message = GnuTLS.strerror(code)
583
return super(GnuTLS.Error, self).__init__(
584
message, *args)
585
586
class CertificateSecurityError(Error):
587
pass
588
589
# Classes
590
class Credentials(object):
591
def __init__(self):
592
self._c_object = gnutls.certificate_credentials_t()
593
gnutls.certificate_allocate_credentials(
594
ctypes.byref(self._c_object))
595
self.type = gnutls.CRD_CERTIFICATE
596
597
def __del__(self):
598
gnutls.certificate_free_credentials(self._c_object)
599
600
class ClientSession(object):
601
def __init__(self, socket, credentials=None):
602
self._c_object = gnutls.session_t()
603
gnutls_flags = gnutls.CLIENT
604
if gnutls.check_version("3.5.6"):
605
gnutls_flags |= gnutls.NO_TICKETS
606
if gnutls.has_rawpk:
607
gnutls_flags |= gnutls.ENABLE_RAWPK
608
gnutls.init(ctypes.byref(self._c_object), gnutls_flags)
609
del gnutls_flags
610
gnutls.set_default_priority(self._c_object)
611
gnutls.transport_set_ptr(self._c_object, socket.fileno())
612
gnutls.handshake_set_private_extensions(self._c_object,
613
True)
614
self.socket = socket
615
if credentials is None:
616
credentials = gnutls.Credentials()
617
gnutls.credentials_set(self._c_object, credentials.type,
618
ctypes.cast(credentials._c_object,
619
ctypes.c_void_p))
620
self.credentials = credentials
621
622
def __del__(self):
623
gnutls.deinit(self._c_object)
624
625
def handshake(self):
626
return gnutls.handshake(self._c_object)
627
628
def send(self, data):
629
data = bytes(data)
630
data_len = len(data)
631
while data_len > 0:
632
data_len -= gnutls.record_send(self._c_object,
633
data[-data_len:],
634
data_len)
635
636
def bye(self):
637
return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
638
639
# Error handling functions
640
def _error_code(result):
641
"""A function to raise exceptions on errors, suitable
642
for the 'restype' attribute on ctypes functions"""
643
if result >= 0:
644
return result
645
if result == gnutls.E_NO_CERTIFICATE_FOUND:
646
raise gnutls.CertificateSecurityError(code=result)
647
raise gnutls.Error(code=result)
648
649
def _retry_on_error(result, func, arguments):
650
"""A function to retry on some errors, suitable
651
for the 'errcheck' attribute on ctypes functions"""
652
while result < 0:
653
if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
654
return _error_code(result)
655
result = func(*arguments)
656
return result
657
658
# Unless otherwise indicated, the function declarations below are
659
# all from the gnutls/gnutls.h C header file.
660
661
# Functions
662
priority_set_direct = _library.gnutls_priority_set_direct
663
priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
664
ctypes.POINTER(ctypes.c_char_p)]
665
priority_set_direct.restype = _error_code
666
667
init = _library.gnutls_init
668
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
669
init.restype = _error_code
670
671
set_default_priority = _library.gnutls_set_default_priority
672
set_default_priority.argtypes = [session_t]
673
set_default_priority.restype = _error_code
674
675
record_send = _library.gnutls_record_send
676
record_send.argtypes = [session_t, ctypes.c_void_p,
677
ctypes.c_size_t]
678
record_send.restype = ctypes.c_ssize_t
679
record_send.errcheck = _retry_on_error
680
681
certificate_allocate_credentials = (
682
_library.gnutls_certificate_allocate_credentials)
683
certificate_allocate_credentials.argtypes = [
684
ctypes.POINTER(certificate_credentials_t)]
685
certificate_allocate_credentials.restype = _error_code
686
687
certificate_free_credentials = (
688
_library.gnutls_certificate_free_credentials)
689
certificate_free_credentials.argtypes = [
690
certificate_credentials_t]
691
certificate_free_credentials.restype = None
692
693
handshake_set_private_extensions = (
694
_library.gnutls_handshake_set_private_extensions)
695
handshake_set_private_extensions.argtypes = [session_t,
696
ctypes.c_int]
697
handshake_set_private_extensions.restype = None
698
699
credentials_set = _library.gnutls_credentials_set
700
credentials_set.argtypes = [session_t, credentials_type_t,
701
ctypes.c_void_p]
702
credentials_set.restype = _error_code
703
704
strerror = _library.gnutls_strerror
705
strerror.argtypes = [ctypes.c_int]
706
strerror.restype = ctypes.c_char_p
707
708
certificate_type_get = _library.gnutls_certificate_type_get
709
certificate_type_get.argtypes = [session_t]
710
certificate_type_get.restype = _error_code
711
712
certificate_get_peers = _library.gnutls_certificate_get_peers
713
certificate_get_peers.argtypes = [session_t,
714
ctypes.POINTER(ctypes.c_uint)]
715
certificate_get_peers.restype = ctypes.POINTER(datum_t)
716
717
global_set_log_level = _library.gnutls_global_set_log_level
718
global_set_log_level.argtypes = [ctypes.c_int]
719
global_set_log_level.restype = None
720
721
global_set_log_function = _library.gnutls_global_set_log_function
722
global_set_log_function.argtypes = [log_func]
723
global_set_log_function.restype = None
724
725
deinit = _library.gnutls_deinit
726
deinit.argtypes = [session_t]
727
deinit.restype = None
728
729
handshake = _library.gnutls_handshake
730
handshake.argtypes = [session_t]
731
handshake.restype = _error_code
732
handshake.errcheck = _retry_on_error
733
734
transport_set_ptr = _library.gnutls_transport_set_ptr
735
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
736
transport_set_ptr.restype = None
737
738
bye = _library.gnutls_bye
739
bye.argtypes = [session_t, close_request_t]
740
bye.restype = _error_code
741
bye.errcheck = _retry_on_error
742
743
check_version = _library.gnutls_check_version
744
check_version.argtypes = [ctypes.c_char_p]
745
check_version.restype = ctypes.c_char_p
746
747
has_rawpk = bool(check_version(_tls_rawpk_version))
748
749
if has_rawpk:
750
# Types
751
class pubkey_st(ctypes.Structure):
752
_fields = []
753
pubkey_t = ctypes.POINTER(pubkey_st)
754
755
x509_crt_fmt_t = ctypes.c_int
756
757
# All the function declarations below are from gnutls/abstract.h
758
pubkey_init = _library.gnutls_pubkey_init
759
pubkey_init.argtypes = [ctypes.POINTER(pubkey_t)]
760
pubkey_init.restype = _error_code
761
762
pubkey_import = _library.gnutls_pubkey_import
763
pubkey_import.argtypes = [pubkey_t, ctypes.POINTER(datum_t),
764
x509_crt_fmt_t]
765
pubkey_import.restype = _error_code
766
767
pubkey_get_key_id = _library.gnutls_pubkey_get_key_id
768
pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,
769
ctypes.POINTER(ctypes.c_ubyte),
770
ctypes.POINTER(ctypes.c_size_t)]
771
pubkey_get_key_id.restype = _error_code
772
773
pubkey_deinit = _library.gnutls_pubkey_deinit
774
pubkey_deinit.argtypes = [pubkey_t]
775
pubkey_deinit.restype = None
776
else:
777
# All the function declarations below are from gnutls/openpgp.h
778
779
openpgp_crt_init = _library.gnutls_openpgp_crt_init
780
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
781
openpgp_crt_init.restype = _error_code
782
783
openpgp_crt_import = _library.gnutls_openpgp_crt_import
784
openpgp_crt_import.argtypes = [openpgp_crt_t,
785
ctypes.POINTER(datum_t),
786
openpgp_crt_fmt_t]
787
openpgp_crt_import.restype = _error_code
788
789
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
790
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
791
ctypes.POINTER(ctypes.c_uint)]
792
openpgp_crt_verify_self.restype = _error_code
793
794
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
795
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
796
openpgp_crt_deinit.restype = None
797
798
openpgp_crt_get_fingerprint = (
799
_library.gnutls_openpgp_crt_get_fingerprint)
800
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
801
ctypes.c_void_p,
802
ctypes.POINTER(
803
ctypes.c_size_t)]
804
openpgp_crt_get_fingerprint.restype = _error_code
805
806
if check_version("3.6.4"):
807
certificate_type_get2 = _library.gnutls_certificate_type_get2
808
certificate_type_get2.argtypes = [session_t, ctypes.c_int]
809
certificate_type_get2.restype = _error_code
810
811
# Remove non-public functions
812
del _error_code, _retry_on_error
813
# Create the global "gnutls" object, simulating a module
814
gnutls = GnuTLS()
815
816
817
def call_pipe(connection, # : multiprocessing.Connection
818
func, *args, **kwargs):
819
"""This function is meant to be called by multiprocessing.Process
820
821
This function runs func(*args, **kwargs), and writes the resulting
822
return value on the provided multiprocessing.Connection.
823
"""
824
connection.send(func(*args, **kwargs))
825
connection.close()
826
827
275
828
class Client(object):
276
829
"""A representation of a client host served by this server.
277
830
278
831
Attributes:
279
_approved: bool(); 'None' if not yet approved/disapproved
832
approved: bool(); 'None' if not yet approved/disapproved
280
833
approval_delay: datetime.timedelta(); Time to wait for approval
281
834
approval_duration: datetime.timedelta(); Duration of one approval
282
835
checker: subprocess.Popen(); a running checker process used
283
836
to see if the client lives.
284
837
'None' if no process is running.
285
checker_callback_tag: a gobject event source tag, or None
838
checker_callback_tag: a GLib event source tag, or None
286
839
checker_command: string; External command which is run to check
287
840
if client lives. %() expansions are done at
288
841
runtime with vars(self) as dict, so that for
289
842
instance %(name)s can be used in the command.
290
checker_initiator_tag: a gobject event source tag, or None
843
checker_initiator_tag: a GLib event source tag, or None
291
844
created: datetime.datetime(); (UTC) object creation
845
client_structure: Object describing what attributes a client has
846
and is used for storing the client at exit
292
847
current_checker_command: string; current running checker_command
293
disable_hook: If set, called by disable() as disable_hook(self)
294
disable_initiator_tag: a gobject event source tag, or None
848
disable_initiator_tag: a GLib event source tag, or None
295
849
enabled: bool()
296
850
fingerprint: string (40 or 32 hexadecimal digits); used to
297
uniquely identify the client
851
uniquely identify an OpenPGP client
852
key_id: string (64 hexadecimal digits); used to uniquely identify
853
a client using raw public keys
298
854
host: string; available for use by the checker command
299
855
interval: datetime.timedelta(); How often to start a new checker
300
856
last_approval_request: datetime.datetime(); (UTC) or None
301
857
last_checked_ok: datetime.datetime(); (UTC) or None
302
last_enabled: datetime.datetime(); (UTC)
858
last_checker_status: integer between 0 and 255 reflecting exit
859
status of last checker. -1 reflects crashed
860
checker, -2 means no checker completed yet.
861
last_checker_signal: The signal which killed the last checker, if
862
last_checker_status is -1
863
last_enabled: datetime.datetime(); (UTC) or None
303
864
name: string; from the config file, used in log messages and
304
865
D-Bus identifiers
305
866
secret: bytestring; sent verbatim (over TLS) to client
306
867
timeout: datetime.timedelta(); How long from last_checked_ok
307
868
until this client is disabled
308
extended_timeout: extra long timeout when password has been sent
869
extended_timeout: extra long timeout when secret has been sent
309
870
runtime_expansions: Allowed attributes for runtime expansion.
310
871
expires: datetime.datetime(); time (UTC) when a client will be
311
872
disabled, or None
873
server_settings: The server_settings dict from main()
312
874
"""
313
875
314
876
runtime_expansions = ("approval_delay", "approval_duration",
315
"created", "enabled", "fingerprint",
316
"host", "interval", "last_checked_ok",
877
"created", "enabled", "expires", "key_id",
878
"fingerprint", "host", "interval",
879
"last_approval_request", "last_checked_ok",
317
880
"last_enabled", "name", "timeout")
318
319
def timeout_milliseconds(self):
320
"Return the 'timeout' attribute in milliseconds"
321
return _timedelta_to_milliseconds(self.timeout)
322
323
def extended_timeout_milliseconds(self):
324
"Return the 'extended_timeout' attribute in milliseconds"
325
return _timedelta_to_milliseconds(self.extended_timeout)
326
327
def interval_milliseconds(self):
328
"Return the 'interval' attribute in milliseconds"
329
return _timedelta_to_milliseconds(self.interval)
330
331
def approval_delay_milliseconds(self):
332
return _timedelta_to_milliseconds(self.approval_delay)
333
334
def __init__(self, name = None, disable_hook=None, config=None):
335
"""Note: the 'checker' key in 'config' sets the
336
'checker_command' attribute and *not* the 'checker'
337
attribute."""
881
client_defaults = {
882
"timeout": "PT5M",
883
"extended_timeout": "PT15M",
884
"interval": "PT2M",
885
"checker": "fping -q -- %%(host)s",
886
"host": "",
887
"approval_delay": "PT0S",
888
"approval_duration": "PT1S",
889
"approved_by_default": "True",
890
"enabled": "True",
891
}
892
893
@staticmethod
894
def config_parser(config):
895
"""Construct a new dict of client settings of this form:
896
{ client_name: {setting_name: value, ...}, ...}
897
with exceptions for any special settings as defined above.
898
NOTE: Must be a pure function. Must return the same result
899
value given the same arguments.
900
"""
901
settings = {}
902
for client_name in config.sections():
903
section = dict(config.items(client_name))
904
client = settings[client_name] = {}
905
906
client["host"] = section["host"]
907
# Reformat values from string types to Python types
908
client["approved_by_default"] = config.getboolean(
909
client_name, "approved_by_default")
910
client["enabled"] = config.getboolean(client_name,
911
"enabled")
912
913
# Uppercase and remove spaces from key_id and fingerprint
914
# for later comparison purposes with return value from the
915
# key_id() and fingerprint() functions
916
client["key_id"] = (section.get("key_id", "").upper()
917
.replace(" ", ""))
918
client["fingerprint"] = (section["fingerprint"].upper()
919
.replace(" ", ""))
920
if "secret" in section:
921
client["secret"] = codecs.decode(section["secret"]
922
.encode("utf-8"),
923
"base64")
924
elif "secfile" in section:
925
with open(os.path.expanduser(os.path.expandvars
926
(section["secfile"])),
927
"rb") as secfile:
928
client["secret"] = secfile.read()
929
else:
930
raise TypeError("No secret or secfile for section {}"
931
.format(section))
932
client["timeout"] = string_to_delta(section["timeout"])
933
client["extended_timeout"] = string_to_delta(
934
section["extended_timeout"])
935
client["interval"] = string_to_delta(section["interval"])
936
client["approval_delay"] = string_to_delta(
937
section["approval_delay"])
938
client["approval_duration"] = string_to_delta(
939
section["approval_duration"])
940
client["checker_command"] = section["checker"]
941
client["last_approval_request"] = None
942
client["last_checked_ok"] = None
943
client["last_checker_status"] = -2
944
945
return settings
946
947
def __init__(self, settings, name=None, server_settings=None):
338
948
self.name = name
339
if config is None:
340
config = {}
949
if server_settings is None:
950
server_settings = {}
951
self.server_settings = server_settings
952
# adding all client settings
953
for setting, value in settings.items():
954
setattr(self, setting, value)
955
956
if self.enabled:
957
if not hasattr(self, "last_enabled"):
958
self.last_enabled = datetime.datetime.utcnow()
959
if not hasattr(self, "expires"):
960
self.expires = (datetime.datetime.utcnow()
961
+ self.timeout)
962
else:
963
self.last_enabled = None
964
self.expires = None
965
341
966
logger.debug("Creating client %r", self.name)
342
# Uppercase and remove spaces from fingerprint for later
343
# comparison purposes with return value from the fingerprint()
344
# function
345
self.fingerprint = (config["fingerprint"].upper()
346
.replace(" ", ""))
967
logger.debug(" Key ID: %s", self.key_id)
347
968
logger.debug(" Fingerprint: %s", self.fingerprint)
348
if "secret" in config:
349
self.secret = config["secret"].decode("base64")
350
elif "secfile" in config:
351
with open(os.path.expanduser(os.path.expandvars
352
(config["secfile"])),
353
"rb") as secfile:
354
self.secret = secfile.read()
355
else:
356
raise TypeError("No secret or secfile for client %s"
357
% self.name)
358
self.host = config.get("host", "")
359
self.created = datetime.datetime.utcnow()
360
self.enabled = False
361
self.last_approval_request = None
362
self.last_enabled = None
363
self.last_checked_ok = None
364
self.timeout = string_to_delta(config["timeout"])
365
self.extended_timeout = string_to_delta(config
366
["extended_timeout"])
367
self.interval = string_to_delta(config["interval"])
368
self.disable_hook = disable_hook
969
self.created = settings.get("created",
970
datetime.datetime.utcnow())
971
972
# attributes specific for this server instance
369
973
self.checker = None
370
974
self.checker_initiator_tag = None
371
975
self.disable_initiator_tag = None
372
self.expires = None
373
976
self.checker_callback_tag = None
374
self.checker_command = config["checker"]
375
977
self.current_checker_command = None
376
self.last_connect = None
377
self._approved = None
378
self.approved_by_default = config.get("approved_by_default",
379
True)
978
self.approved = None
380
979
self.approvals_pending = 0
381
self.approval_delay = string_to_delta(
382
config["approval_delay"])
383
self.approval_duration = string_to_delta(
384
config["approval_duration"])
385
self.changedstate = (multiprocessing_manager
386
.Condition(multiprocessing_manager
387
.Lock()))
388
980
self.changedstate = multiprocessing_manager.Condition(
981
multiprocessing_manager.Lock())
982
self.client_structure = [attr
983
for attr in self.__dict__.keys()
984
if not attr.startswith("_")]
985
self.client_structure.append("client_structure")
986
987
for name, t in inspect.getmembers(
988
type(self), lambda obj: isinstance(obj, property)):
989
if not name.startswith("_"):
990
self.client_structure.append(name)
991
992
# Send notice to process children that client state has changed
389
993
def send_changedstate(self):
390
self.changedstate.acquire()
391
self.changedstate.notify_all()
392
self.changedstate.release()
393
994
with self.changedstate:
995
self.changedstate.notify_all()
996
394
997
def enable(self):
395
998
"""Start this client's checker and timeout hooks"""
396
999
if getattr(self, "enabled", False):
397
1000
# Already enabled
398
1001
return
399
self.send_changedstate()
400
# Schedule a new checker to be started an 'interval' from now,
401
# and every interval from then on.
402
self.checker_initiator_tag = (gobject.timeout_add
403
(self.interval_milliseconds(),
404
self.start_checker))
405
# Schedule a disable() when 'timeout' has passed
406
1002
self.expires = datetime.datetime.utcnow() + self.timeout
407
self.disable_initiator_tag = (gobject.timeout_add
408
(self.timeout_milliseconds(),
409
self.disable))
410
1003
self.enabled = True
411
1004
self.last_enabled = datetime.datetime.utcnow()
412
# Also start a new checker *right now*.
413
self.start_checker()
414
1005
self.init_checker()
1006
self.send_changedstate()
1007
415
1008
def disable(self, quiet=True):
416
1009
"""Disable this client."""
417
1010
if not getattr(self, "enabled", False):
418
1011
return False
419
1012
if not quiet:
420
self.send_changedstate()
421
if not quiet:
422
1013
logger.info("Disabling client %s", self.name)
423
if getattr(self, "disable_initiator_tag", False):
424
gobject.source_remove(self.disable_initiator_tag)
1014
if getattr(self, "disable_initiator_tag", None) is not None:
1015
GLib.source_remove(self.disable_initiator_tag)
425
1016
self.disable_initiator_tag = None
426
1017
self.expires = None
427
if getattr(self, "checker_initiator_tag", False):
428
gobject.source_remove(self.checker_initiator_tag)
1018
if getattr(self, "checker_initiator_tag", None) is not None:
1019
GLib.source_remove(self.checker_initiator_tag)
429
1020
self.checker_initiator_tag = None
430
1021
self.stop_checker()
431
if self.disable_hook:
432
self.disable_hook(self)
433
1022
self.enabled = False
434
# Do not run this again if called by a gobject.timeout_add
1023
if not quiet:
1024
self.send_changedstate()
1025
# Do not run this again if called by a GLib.timeout_add
435
1026
return False
436
1027
437
1028
def __del__(self):
438
self.disable_hook = None
439
1029
self.disable()
440
441
def checker_callback(self, pid, condition, command):
1030
1031
def init_checker(self):
1032
# Schedule a new checker to be started an 'interval' from now,
1033
# and every interval from then on.
1034
if self.checker_initiator_tag is not None:
1035
GLib.source_remove(self.checker_initiator_tag)
1036
self.checker_initiator_tag = GLib.timeout_add(
1037
int(self.interval.total_seconds() * 1000),
1038
self.start_checker)
1039
# Schedule a disable() when 'timeout' has passed
1040
if self.disable_initiator_tag is not None:
1041
GLib.source_remove(self.disable_initiator_tag)
1042
self.disable_initiator_tag = GLib.timeout_add(
1043
int(self.timeout.total_seconds() * 1000), self.disable)
1044
# Also start a new checker *right now*.
1045
self.start_checker()
1046
1047
def checker_callback(self, source, condition, connection,
1048
command):
442
1049
"""The checker has completed, so take appropriate actions."""
443
1050
self.checker_callback_tag = None
444
1051
self.checker = None
445
if os.WIFEXITED(condition):
446
exitstatus = os.WEXITSTATUS(condition)
447
if exitstatus == 0:
1052
# Read return code from connection (see call_pipe)
1053
returncode = connection.recv()
1054
connection.close()
1055
1056
if returncode >= 0:
1057
self.last_checker_status = returncode
1058
self.last_checker_signal = None
1059
if self.last_checker_status == 0:
448
1060
logger.info("Checker for %(name)s succeeded",
449
1061
vars(self))
450
1062
self.checked_ok()
451
1063
else:
452
logger.info("Checker for %(name)s failed",
453
vars(self))
1064
logger.info("Checker for %(name)s failed", vars(self))
454
1065
else:
1066
self.last_checker_status = -1
1067
self.last_checker_signal = -returncode
455
1068
logger.warning("Checker for %(name)s crashed?",
456
1069
vars(self))
457
458
def checked_ok(self, timeout=None):
459
"""Bump up the timeout for this client.
460
461
This should only be called when the client has been seen,
462
alive and well.
463
"""
1070
return False
1071
1072
def checked_ok(self):
1073
"""Assert that the client has been seen, alive and well."""
1074
self.last_checked_ok = datetime.datetime.utcnow()
1075
self.last_checker_status = 0
1076
self.last_checker_signal = None
1077
self.bump_timeout()
1078
1079
def bump_timeout(self, timeout=None):
1080
"""Bump up the timeout for this client."""
464
1081
if timeout is None:
465
1082
timeout = self.timeout
466
self.last_checked_ok = datetime.datetime.utcnow()
467
gobject.source_remove(self.disable_initiator_tag)
468
self.expires = datetime.datetime.utcnow() + timeout
469
self.disable_initiator_tag = (gobject.timeout_add
470
(_timedelta_to_milliseconds
471
(timeout), self.disable))
472
1083
if self.disable_initiator_tag is not None:
1084
GLib.source_remove(self.disable_initiator_tag)
1085
self.disable_initiator_tag = None
1086
if getattr(self, "enabled", False):
1087
self.disable_initiator_tag = GLib.timeout_add(
1088
int(timeout.total_seconds() * 1000), self.disable)
1089
self.expires = datetime.datetime.utcnow() + timeout
1090
473
1091
def need_approval(self):
474
1092
self.last_approval_request = datetime.datetime.utcnow()
475
1093
476
1094
def start_checker(self):
477
1095
"""Start a new checker subprocess if one is not running.
478
1096
479
1097
If a checker already exists, leave it running and do
480
1098
nothing."""
481
1099
# The reason for not killing a running checker is that if we
482
# did that, then if a checker (for some reason) started
483
# running slowly and taking more than 'interval' time, the
484
# client would inevitably timeout, since no checker would get
485
# a chance to run to completion. If we instead leave running
1100
# did that, and if a checker (for some reason) started running
1101
# slowly and taking more than 'interval' time, then the client
1102
# would inevitably timeout, since no checker would get a
1103
# chance to run to completion. If we instead leave running
486
1104
# checkers alone, the checker would have to take more time
487
1105
# than 'timeout' for the client to be disabled, which is as it
488
1106
# should be.
489
490
# If a checker exists, make sure it is not a zombie
491
try:
492
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
493
except (AttributeError, OSError) as error:
494
if (isinstance(error, OSError)
495
and error.errno != errno.ECHILD):
496
raise error
497
else:
498
if pid:
499
logger.warning("Checker was a zombie")
500
gobject.source_remove(self.checker_callback_tag)
501
self.checker_callback(pid, status,
502
self.current_checker_command)
1107
1108
if self.checker is not None and not self.checker.is_alive():
1109
logger.warning("Checker was not alive; joining")
1110
self.checker.join()
1111
self.checker = None
503
1112
# Start a new checker if needed
504
1113
if self.checker is None:
1114
# Escape attributes for the shell
1115
escaped_attrs = {
1116
attr: re.escape(str(getattr(self, attr)))
1117
for attr in self.runtime_expansions}
505
1118
try:
506
# In case checker_command has exactly one % operator
507
command = self.checker_command % self.host
508
except TypeError:
509
# Escape attributes for the shell
510
escaped_attrs = dict(
511
(attr,
512
re.escape(unicode(str(getattr(self, attr, "")),
513
errors=
514
'replace')))
515
for attr in
516
self.runtime_expansions)
517
518
try:
519
command = self.checker_command % escaped_attrs
520
except TypeError as error:
521
logger.error('Could not format string "%s":'
522
' %s', self.checker_command, error)
523
return True # Try again later
1119
command = self.checker_command % escaped_attrs
1120
except TypeError as error:
1121
logger.error('Could not format string "%s"',
1122
self.checker_command,
1123
exc_info=error)
1124
return True # Try again later
524
1125
self.current_checker_command = command
525
try:
526
logger.info("Starting checker %r for %s",
527
command, self.name)
528
# We don't need to redirect stdout and stderr, since
529
# in normal mode, that is already done by daemon(),
530
# and in debug mode we don't want to. (Stdin is
531
# always replaced by /dev/null.)
532
self.checker = subprocess.Popen(command,
533
close_fds=True,
534
shell=True, cwd="/")
535
self.checker_callback_tag = (gobject.child_watch_add
536
(self.checker.pid,
537
self.checker_callback,
538
data=command))
539
# The checker may have completed before the gobject
540
# watch was added. Check for this.
541
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
542
if pid:
543
gobject.source_remove(self.checker_callback_tag)
544
self.checker_callback(pid, status, command)
545
except OSError as error:
546
logger.error("Failed to start subprocess: %s",
547
error)
548
# Re-run this periodically if run by gobject.timeout_add
1126
logger.info("Starting checker %r for %s", command,
1127
self.name)
1128
# We don't need to redirect stdout and stderr, since
1129
# in normal mode, that is already done by daemon(),
1130
# and in debug mode we don't want to. (Stdin is
1131
# always replaced by /dev/null.)
1132
# The exception is when not debugging but nevertheless
1133
# running in the foreground; use the previously
1134
# created wnull.
1135
popen_args = {"close_fds": True,
1136
"shell": True,
1137
"cwd": "/"}
1138
if (not self.server_settings["debug"]
1139
and self.server_settings["foreground"]):
1140
popen_args.update({"stdout": wnull,
1141
"stderr": wnull})
1142
pipe = multiprocessing.Pipe(duplex=False)
1143
self.checker = multiprocessing.Process(
1144
target=call_pipe,
1145
args=(pipe[1], subprocess.call, command),
1146
kwargs=popen_args)
1147
self.checker.start()
1148
self.checker_callback_tag = GLib.io_add_watch(
1149
pipe[0].fileno(), GLib.IO_IN,
1150
self.checker_callback, pipe[0], command)
1151
# Re-run this periodically if run by GLib.timeout_add
549
1152
return True
550
1153
551
1154
def stop_checker(self):
552
1155
"""Force the checker process, if any, to stop."""
553
1156
if self.checker_callback_tag:
554
gobject.source_remove(self.checker_callback_tag)
1157
GLib.source_remove(self.checker_callback_tag)
555
1158
self.checker_callback_tag = None
556
1159
if getattr(self, "checker", None) is None:
557
1160
return
558
1161
logger.debug("Stopping checker for %(name)s", vars(self))
559
try:
560
os.kill(self.checker.pid, signal.SIGTERM)
561
#time.sleep(0.5)
562
#if self.checker.poll() is None:
563
# os.kill(self.checker.pid, signal.SIGKILL)
564
except OSError as error:
565
if error.errno != errno.ESRCH: # No such process
566
raise
1162
self.checker.terminate()
567
1163
self.checker = None
568
1164
569
1165
570
def dbus_service_property(dbus_interface, signature="v",
571
access="readwrite", byte_arrays=False):
1166
def dbus_service_property(dbus_interface,
1167
signature="v",
1168
access="readwrite",
1169
byte_arrays=False):
572
1170
"""Decorators for marking methods of a DBusObjectWithProperties to
573
1171
become properties on the D-Bus.
574
1172
575
1173
The decorated method will be called with no arguments by "Get"
576
1174
and with one argument by "Set".
577
1175
578
1176
The parameters, where they are supported, are the same as
579
1177
dbus.service.method, except there is only "signature", since the
580
1178
type from Get() and the type sent to Set() is the same.
583
1181
# "Set" method, so we fail early here:
584
1182
if byte_arrays and signature != "ay":
585
1183
raise ValueError("Byte arrays not supported for non-'ay'"
586
" signature %r" % signature)
1184
" signature {!r}".format(signature))
1185
587
1186
def decorator(func):
588
1187
func._dbus_is_property = True
589
1188
func._dbus_interface = dbus_interface
592
1191
func._dbus_name = func.__name__
593
1192
if func._dbus_name.endswith("_dbus_property"):
594
1193
func._dbus_name = func._dbus_name[:-14]
595
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
596
return func
1194
func._dbus_get_args_options = {'byte_arrays': byte_arrays}
1195
return func
1196
1197
return decorator
1198
1199
1200
def dbus_interface_annotations(dbus_interface):
1201
"""Decorator for marking functions returning interface annotations
1202
1203
Usage:
1204
1205
@dbus_interface_annotations("org.example.Interface")
1206
def _foo(self): # Function name does not matter
1207
return {"org.freedesktop.DBus.Deprecated": "true",
1208
"org.freedesktop.DBus.Property.EmitsChangedSignal":
1209
"false"}
1210
"""
1211
1212
def decorator(func):
1213
func._dbus_is_interface = True
1214
func._dbus_interface = dbus_interface
1215
func._dbus_name = dbus_interface
1216
return func
1217
1218
return decorator
1219
1220
1221
def dbus_annotations(annotations):
1222
"""Decorator to annotate D-Bus methods, signals or properties
1223
Usage:
1224
1225
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
1226
"org.freedesktop.DBus.Property."
1227
"EmitsChangedSignal": "false"})
1228
@dbus_service_property("org.example.Interface", signature="b",
1229
access="r")
1230
def Property_dbus_property(self):
1231
return dbus.Boolean(False)
1232
1233
See also the DBusObjectWithAnnotations class.
1234
"""
1235
1236
def decorator(func):
1237
func._dbus_annotations = annotations
1238
return func
1239
597
1240
return decorator
598
1241
599
1242
600
1243
class DBusPropertyException(dbus.exceptions.DBusException):
601
1244
"""A base class for D-Bus property-related exceptions
602
1245
"""
603
def __unicode__(self):
604
return unicode(str(self))
1246
pass
605
1247
606
1248
607
1249
class DBusPropertyAccessException(DBusPropertyException):
616
1258
pass
617
1259
618
1260
619
class DBusObjectWithProperties(dbus.service.Object):
1261
class DBusObjectWithAnnotations(dbus.service.Object):
1262
"""A D-Bus object with annotations.
1263
1264
Classes inheriting from this can use the dbus_annotations
1265
decorator to add annotations to methods or signals.
1266
"""
1267
1268
@staticmethod
1269
def _is_dbus_thing(thing):
1270
"""Returns a function testing if an attribute is a D-Bus thing
1271
1272
If called like _is_dbus_thing("method") it returns a function
1273
suitable for use as predicate to inspect.getmembers().
1274
"""
1275
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
1276
False)
1277
1278
def _get_all_dbus_things(self, thing):
1279
"""Returns a generator of (name, attribute) pairs
1280
"""
1281
return ((getattr(athing.__get__(self), "_dbus_name", name),
1282
athing.__get__(self))
1283
for cls in self.__class__.__mro__
1284
for name, athing in
1285
inspect.getmembers(cls, self._is_dbus_thing(thing)))
1286
1287
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1288
out_signature="s",
1289
path_keyword='object_path',
1290
connection_keyword='connection')
1291
def Introspect(self, object_path, connection):
1292
"""Overloading of standard D-Bus method.
1293
1294
Inserts annotation tags on methods and signals.
1295
"""
1296
xmlstring = dbus.service.Object.Introspect(self, object_path,
1297
connection)
1298
try:
1299
document = xml.dom.minidom.parseString(xmlstring)
1300
1301
for if_tag in document.getElementsByTagName("interface"):
1302
# Add annotation tags
1303
for typ in ("method", "signal"):
1304
for tag in if_tag.getElementsByTagName(typ):
1305
annots = dict()
1306
for name, prop in (self.
1307
_get_all_dbus_things(typ)):
1308
if (name == tag.getAttribute("name")
1309
and prop._dbus_interface
1310
== if_tag.getAttribute("name")):
1311
annots.update(getattr(
1312
prop, "_dbus_annotations", {}))
1313
for name, value in annots.items():
1314
ann_tag = document.createElement(
1315
"annotation")
1316
ann_tag.setAttribute("name", name)
1317
ann_tag.setAttribute("value", value)
1318
tag.appendChild(ann_tag)
1319
# Add interface annotation tags
1320
for annotation, value in dict(
1321
itertools.chain.from_iterable(
1322
annotations().items()
1323
for name, annotations
1324
in self._get_all_dbus_things("interface")
1325
if name == if_tag.getAttribute("name")
1326
)).items():
1327
ann_tag = document.createElement("annotation")
1328
ann_tag.setAttribute("name", annotation)
1329
ann_tag.setAttribute("value", value)
1330
if_tag.appendChild(ann_tag)
1331
# Fix argument name for the Introspect method itself
1332
if (if_tag.getAttribute("name")
1333
== dbus.INTROSPECTABLE_IFACE):
1334
for cn in if_tag.getElementsByTagName("method"):
1335
if cn.getAttribute("name") == "Introspect":
1336
for arg in cn.getElementsByTagName("arg"):
1337
if (arg.getAttribute("direction")
1338
== "out"):
1339
arg.setAttribute("name",
1340
"xml_data")
1341
xmlstring = document.toxml("utf-8")
1342
document.unlink()
1343
except (AttributeError, xml.dom.DOMException,
1344
xml.parsers.expat.ExpatError) as error:
1345
logger.error("Failed to override Introspection method",
1346
exc_info=error)
1347
return xmlstring
1348
1349
1350
class DBusObjectWithProperties(DBusObjectWithAnnotations):
620
1351
"""A D-Bus object with properties.
621
1352
622
1353
Classes inheriting from this can use the dbus_service_property
623
1354
decorator to expose methods as D-Bus properties. It exposes the
624
1355
standard Get(), Set(), and GetAll() methods on the D-Bus.
625
1356
"""
626
627
@staticmethod
628
def _is_dbus_property(obj):
629
return getattr(obj, "_dbus_is_property", False)
630
631
def _get_all_dbus_properties(self):
632
"""Returns a generator of (name, attribute) pairs
633
"""
634
return ((prop.__get__(self)._dbus_name, prop.__get__(self))
635
for cls in self.__class__.__mro__
636
for name, prop in
637
inspect.getmembers(cls, self._is_dbus_property))
638
1357
639
1358
def _get_dbus_property(self, interface_name, property_name):
640
1359
"""Returns a bound method if one exists which is a D-Bus
641
1360
property with the specified name and interface.
642
1361
"""
643
for cls in self.__class__.__mro__:
644
for name, value in (inspect.getmembers
645
(cls, self._is_dbus_property)):
1362
for cls in self.__class__.__mro__:
1363
for name, value in inspect.getmembers(
1364
cls, self._is_dbus_thing("property")):
646
1365
if (value._dbus_name == property_name
647
1366
and value._dbus_interface == interface_name):
648
1367
return value.__get__(self)
649
1368
650
1369
# No such property
651
raise DBusPropertyNotFound(self.dbus_object_path + ":"
652
+ interface_name + "."
653
+ property_name)
654
655
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
1370
raise DBusPropertyNotFound("{}:{}.{}".format(
1371
self.dbus_object_path, interface_name, property_name))
1372
1373
@classmethod
1374
def _get_all_interface_names(cls):
1375
"""Get a sequence of all interfaces supported by an object"""
1376
return (name for name in set(getattr(getattr(x, attr),
1377
"_dbus_interface", None)
1378
for x in (inspect.getmro(cls))
1379
for attr in dir(x))
1380
if name is not None)
1381
1382
@dbus.service.method(dbus.PROPERTIES_IFACE,
1383
in_signature="ss",
656
1384
out_signature="v")
657
1385
def Get(self, interface_name, property_name):
658
1386
"""Standard D-Bus property Get() method, see D-Bus standard.
664
1392
if not hasattr(value, "variant_level"):
665
1393
return value
666
1394
return type(value)(value, variant_level=value.variant_level+1)
667
1395
668
1396
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
669
1397
def Set(self, interface_name, property_name, value):
670
1398
"""Standard D-Bus property Set() method, see D-Bus standard.
676
1404
# The byte_arrays option is not supported yet on
677
1405
# signatures other than "ay".
678
1406
if prop._dbus_signature != "ay":
679
raise ValueError
680
value = dbus.ByteArray(''.join(unichr(byte)
681
for byte in value))
1407
raise ValueError("Byte arrays not supported for non-"
1408
"'ay' signature {!r}"
1409
.format(prop._dbus_signature))
1410
value = dbus.ByteArray(b''.join(chr(byte)
1411
for byte in value))
682
1412
prop(value)
683
684
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
1413
1414
@dbus.service.method(dbus.PROPERTIES_IFACE,
1415
in_signature="s",
685
1416
out_signature="a{sv}")
686
1417
def GetAll(self, interface_name):
687
1418
"""Standard D-Bus property GetAll() method, see D-Bus
688
1419
standard.
689
1420
690
1421
Note: Will not include properties with access="write".
691
1422
"""
692
all = {}
693
for name, prop in self._get_all_dbus_properties():
1423
properties = {}
1424
for name, prop in self._get_all_dbus_things("property"):
694
1425
if (interface_name
695
1426
and interface_name != prop._dbus_interface):
696
1427
# Interface non-empty but did not match
700
1431
continue
701
1432
value = prop()
702
1433
if not hasattr(value, "variant_level"):
703
all[name] = value
1434
properties[name] = value
704
1435
continue
705
all[name] = type(value)(value, variant_level=
706
value.variant_level+1)
707
return dbus.Dictionary(all, signature="sv")
708
1436
properties[name] = type(value)(
1437
value, variant_level=value.variant_level + 1)
1438
return dbus.Dictionary(properties, signature="sv")
1439
1440
@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
1441
def PropertiesChanged(self, interface_name, changed_properties,
1442
invalidated_properties):
1443
"""Standard D-Bus PropertiesChanged() signal, see D-Bus
1444
standard.
1445
"""
1446
pass
1447
709
1448
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
710
1449
out_signature="s",
711
1450
path_keyword='object_path',
712
1451
connection_keyword='connection')
713
1452
def Introspect(self, object_path, connection):
714
"""Standard D-Bus method, overloaded to insert property tags.
1453
"""Overloading of standard D-Bus method.
1454
1455
Inserts property tags and interface annotation tags.
715
1456
"""
716
xmlstring = dbus.service.Object.Introspect(self, object_path,
717
connection)
1457
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1458
object_path,
1459
connection)
718
1460
try:
719
1461
document = xml.dom.minidom.parseString(xmlstring)
1462
720
1463
def make_tag(document, name, prop):
721
1464
e = document.createElement("property")
722
1465
e.setAttribute("name", name)
723
1466
e.setAttribute("type", prop._dbus_signature)
724
1467
e.setAttribute("access", prop._dbus_access)
725
1468
return e
1469
726
1470
for if_tag in document.getElementsByTagName("interface"):
1471
# Add property tags
727
1472
for tag in (make_tag(document, name, prop)
728
1473
for name, prop
729
in self._get_all_dbus_properties()
1474
in self._get_all_dbus_things("property")
730
1475
if prop._dbus_interface
731
1476
== if_tag.getAttribute("name")):
732
1477
if_tag.appendChild(tag)
1478
# Add annotation tags for properties
1479
for tag in if_tag.getElementsByTagName("property"):
1480
annots = dict()
1481
for name, prop in self._get_all_dbus_things(
1482
"property"):
1483
if (name == tag.getAttribute("name")
1484
and prop._dbus_interface
1485
== if_tag.getAttribute("name")):
1486
annots.update(getattr(
1487
prop, "_dbus_annotations", {}))
1488
for name, value in annots.items():
1489
ann_tag = document.createElement(
1490
"annotation")
1491
ann_tag.setAttribute("name", name)
1492
ann_tag.setAttribute("value", value)
1493
tag.appendChild(ann_tag)
733
1494
# Add the names to the return values for the
734
1495
# "org.freedesktop.DBus.Properties" methods
735
1496
if (if_tag.getAttribute("name")
750
1511
except (AttributeError, xml.dom.DOMException,
751
1512
xml.parsers.expat.ExpatError) as error:
752
1513
logger.error("Failed to override Introspection method",
753
error)
754
return xmlstring
755
756
757
def datetime_to_dbus (dt, variant_level=0):
1514
exc_info=error)
1515
return xmlstring
1516
1517
1518
try:
1519
dbus.OBJECT_MANAGER_IFACE
1520
except AttributeError:
1521
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1522
1523
1524
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1525
"""A D-Bus object with an ObjectManager.
1526
1527
Classes inheriting from this exposes the standard
1528
GetManagedObjects call and the InterfacesAdded and
1529
InterfacesRemoved signals on the standard
1530
"org.freedesktop.DBus.ObjectManager" interface.
1531
1532
Note: No signals are sent automatically; they must be sent
1533
manually.
1534
"""
1535
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1536
out_signature="a{oa{sa{sv}}}")
1537
def GetManagedObjects(self):
1538
"""This function must be overridden"""
1539
raise NotImplementedError()
1540
1541
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1542
signature="oa{sa{sv}}")
1543
def InterfacesAdded(self, object_path, interfaces_and_properties):
1544
pass
1545
1546
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1547
def InterfacesRemoved(self, object_path, interfaces):
1548
pass
1549
1550
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1551
out_signature="s",
1552
path_keyword='object_path',
1553
connection_keyword='connection')
1554
def Introspect(self, object_path, connection):
1555
"""Overloading of standard D-Bus method.
1556
1557
Override return argument name of GetManagedObjects to be
1558
"objpath_interfaces_and_properties"
1559
"""
1560
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1561
object_path,
1562
connection)
1563
try:
1564
document = xml.dom.minidom.parseString(xmlstring)
1565
1566
for if_tag in document.getElementsByTagName("interface"):
1567
# Fix argument name for the GetManagedObjects method
1568
if (if_tag.getAttribute("name")
1569
== dbus.OBJECT_MANAGER_IFACE):
1570
for cn in if_tag.getElementsByTagName("method"):
1571
if (cn.getAttribute("name")
1572
== "GetManagedObjects"):
1573
for arg in cn.getElementsByTagName("arg"):
1574
if (arg.getAttribute("direction")
1575
== "out"):
1576
arg.setAttribute(
1577
"name",
1578
"objpath_interfaces"
1579
"_and_properties")
1580
xmlstring = document.toxml("utf-8")
1581
document.unlink()
1582
except (AttributeError, xml.dom.DOMException,
1583
xml.parsers.expat.ExpatError) as error:
1584
logger.error("Failed to override Introspection method",
1585
exc_info=error)
1586
return xmlstring
1587
1588
1589
def datetime_to_dbus(dt, variant_level=0):
758
1590
"""Convert a UTC datetime.datetime() to a D-Bus type."""
759
1591
if dt is None:
760
return dbus.String("", variant_level = variant_level)
761
return dbus.String(dt.isoformat(),
762
variant_level=variant_level)
763
764
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
765
.__metaclass__):
766
"""Applied to an empty subclass of a D-Bus object, this metaclass
767
will add additional D-Bus attributes matching a certain pattern.
1592
return dbus.String("", variant_level=variant_level)
1593
return dbus.String(dt.isoformat(), variant_level=variant_level)
1594
1595
1596
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1597
"""A class decorator; applied to a subclass of
1598
dbus.service.Object, it will add alternate D-Bus attributes with
1599
interface names according to the "alt_interface_names" mapping.
1600
Usage:
1601
1602
@alternate_dbus_interfaces({"org.example.Interface":
1603
"net.example.AlternateInterface"})
1604
class SampleDBusObject(dbus.service.Object):
1605
@dbus.service.method("org.example.Interface")
1606
def SampleDBusMethod():
1607
pass
1608
1609
The above "SampleDBusMethod" on "SampleDBusObject" will be
1610
reachable via two interfaces: "org.example.Interface" and
1611
"net.example.AlternateInterface", the latter of which will have
1612
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1613
"true", unless "deprecate" is passed with a False value.
1614
1615
This works for methods and signals, and also for D-Bus properties
1616
(from DBusObjectWithProperties) and interfaces (from the
1617
dbus_interface_annotations decorator).
768
1618
"""
769
def __new__(mcs, name, bases, attr):
770
# Go through all the base classes which could have D-Bus
771
# methods, signals, or properties in them
772
for base in (b for b in bases
773
if issubclass(b, dbus.service.Object)):
774
# Go though all attributes of the base class
775
for attrname, attribute in inspect.getmembers(base):
1619
1620
def wrapper(cls):
1621
for orig_interface_name, alt_interface_name in (
1622
alt_interface_names.items()):
1623
attr = {}
1624
interface_names = set()
1625
# Go though all attributes of the class
1626
for attrname, attribute in inspect.getmembers(cls):
776
1627
# Ignore non-D-Bus attributes, and D-Bus attributes
777
1628
# with the wrong interface name
778
1629
if (not hasattr(attribute, "_dbus_interface")
779
or not attribute._dbus_interface
780
.startswith("se.recompile.Mandos")):
1630
or not attribute._dbus_interface.startswith(
1631
orig_interface_name)):
781
1632
continue
782
1633
# Create an alternate D-Bus interface name based on
783
1634
# the current name
784
alt_interface = (attribute._dbus_interface
785
.replace("se.recompile.Mandos",
786
"se.bsnet.fukt.Mandos"))
1635
alt_interface = attribute._dbus_interface.replace(
1636
orig_interface_name, alt_interface_name)
1637
interface_names.add(alt_interface)
787
1638
# Is this a D-Bus signal?
788
1639
if getattr(attribute, "_dbus_is_signal", False):
789
# Extract the original non-method function by
790
# black magic
791
nonmethod_func = (dict(
1640
# Extract the original non-method undecorated
1641
# function by black magic
1642
if sys.version_info.major == 2:
1643
nonmethod_func = (dict(
792
1644
zip(attribute.func_code.co_freevars,
793
attribute.__closure__))["func"]
794
.cell_contents)
1645
attribute.__closure__))
1646
["func"].cell_contents)
1647
else:
1648
nonmethod_func = (dict(
1649
zip(attribute.__code__.co_freevars,
1650
attribute.__closure__))
1651
["func"].cell_contents)
795
1652
# Create a new, but exactly alike, function
796
1653
# object, and decorate it to be a new D-Bus signal
797
1654
# with the alternate D-Bus interface name
798
new_function = (dbus.service.signal
799
(alt_interface,
800
attribute._dbus_signature)
801
(types.FunctionType(
802
nonmethod_func.func_code,
803
nonmethod_func.func_globals,
804
nonmethod_func.func_name,
805
nonmethod_func.func_defaults,
806
nonmethod_func.func_closure)))
1655
new_function = copy_function(nonmethod_func)
1656
new_function = (dbus.service.signal(
1657
alt_interface,
1658
attribute._dbus_signature)(new_function))
1659
# Copy annotations, if any
1660
try:
1661
new_function._dbus_annotations = dict(
1662
attribute._dbus_annotations)
1663
except AttributeError:
1664
pass
1665
807
1666
# Define a creator of a function to call both the
808
# old and new functions, so both the old and new
809
# signals gets sent when the function is called
1667
# original and alternate functions, so both the
1668
# original and alternate signals gets sent when
1669
# the function is called
810
1670
def fixscope(func1, func2):
811
1671
"""This function is a scope container to pass
812
1672
func1 and func2 to the "call_both" function
813
1673
outside of its arguments"""
1674
1675
@functools.wraps(func2)
814
1676
def call_both(*args, **kwargs):
815
1677
"""This function will emit two D-Bus
816
1678
signals by calling func1 and func2"""
817
1679
func1(*args, **kwargs)
818
1680
func2(*args, **kwargs)
1681
# Make wrapper function look like a D-Bus
1682
# signal
1683
for name, attr in inspect.getmembers(func2):
1684
if name.startswith("_dbus_"):
1685
setattr(call_both, name, attr)
1686
819
1687
return call_both
820
1688
# Create the "call_both" function and add it to
821
1689
# the class
822
attr[attrname] = fixscope(attribute,
823
new_function)
1690
attr[attrname] = fixscope(attribute, new_function)
824
1691
# Is this a D-Bus method?
825
1692
elif getattr(attribute, "_dbus_is_method", False):
826
1693
# Create a new, but exactly alike, function
827
1694
# object. Decorate it to be a new D-Bus method
828
1695
# with the alternate D-Bus interface name. Add it
829
1696
# to the class.
830
attr[attrname] = (dbus.service.method
831
(alt_interface,
832
attribute._dbus_in_signature,
833
attribute._dbus_out_signature)
834
(types.FunctionType
835
(attribute.func_code,
836
attribute.func_globals,
837
attribute.func_name,
838
attribute.func_defaults,
839
attribute.func_closure)))
1697
attr[attrname] = (
1698
dbus.service.method(
1699
alt_interface,
1700
attribute._dbus_in_signature,
1701
attribute._dbus_out_signature)
1702
(copy_function(attribute)))
1703
# Copy annotations, if any
1704
try:
1705
attr[attrname]._dbus_annotations = dict(
1706
attribute._dbus_annotations)
1707
except AttributeError:
1708
pass
840
1709
# Is this a D-Bus property?
841
1710
elif getattr(attribute, "_dbus_is_property", False):
842
1711
# Create a new, but exactly alike, function
843
1712
# object, and decorate it to be a new D-Bus
844
1713
# property with the alternate D-Bus interface
845
1714
# name. Add it to the class.
846
attr[attrname] = (dbus_service_property
847
(alt_interface,
848
attribute._dbus_signature,
849
attribute._dbus_access,
850
attribute
851
._dbus_get_args_options
852
["byte_arrays"])
853
(types.FunctionType
854
(attribute.func_code,
855
attribute.func_globals,
856
attribute.func_name,
857
attribute.func_defaults,
858
attribute.func_closure)))
859
return type.__new__(mcs, name, bases, attr)
860
1715
attr[attrname] = (dbus_service_property(
1716
alt_interface, attribute._dbus_signature,
1717
attribute._dbus_access,
1718
attribute._dbus_get_args_options
1719
["byte_arrays"])
1720
(copy_function(attribute)))
1721
# Copy annotations, if any
1722
try:
1723
attr[attrname]._dbus_annotations = dict(
1724
attribute._dbus_annotations)
1725
except AttributeError:
1726
pass
1727
# Is this a D-Bus interface?
1728
elif getattr(attribute, "_dbus_is_interface", False):
1729
# Create a new, but exactly alike, function
1730
# object. Decorate it to be a new D-Bus interface
1731
# with the alternate D-Bus interface name. Add it
1732
# to the class.
1733
attr[attrname] = (
1734
dbus_interface_annotations(alt_interface)
1735
(copy_function(attribute)))
1736
if deprecate:
1737
# Deprecate all alternate interfaces
1738
iname = "_AlternateDBusNames_interface_annotation{}"
1739
for interface_name in interface_names:
1740
1741
@dbus_interface_annotations(interface_name)
1742
def func(self):
1743
return {"org.freedesktop.DBus.Deprecated":
1744
"true"}
1745
# Find an unused name
1746
for aname in (iname.format(i)
1747
for i in itertools.count()):
1748
if aname not in attr:
1749
attr[aname] = func
1750
break
1751
if interface_names:
1752
# Replace the class with a new subclass of it with
1753
# methods, signals, etc. as created above.
1754
if sys.version_info.major == 2:
1755
cls = type(b"{}Alternate".format(cls.__name__),
1756
(cls, ), attr)
1757
else:
1758
cls = type("{}Alternate".format(cls.__name__),
1759
(cls, ), attr)
1760
return cls
1761
1762
return wrapper
1763
1764
1765
@alternate_dbus_interfaces({"se.recompile.Mandos":
1766
"se.bsnet.fukt.Mandos"})
861
1767
class ClientDBus(Client, DBusObjectWithProperties):
862
1768
"""A Client class using D-Bus
863
1769
864
1770
Attributes:
865
1771
dbus_object_path: dbus.ObjectPath
866
1772
bus: dbus.SystemBus()
867
1773
"""
868
1774
869
1775
runtime_expansions = (Client.runtime_expansions
870
+ ("dbus_object_path",))
871
1776
+ ("dbus_object_path", ))
1777
1778
_interface = "se.recompile.Mandos.Client"
1779
872
1780
# dbus.service.Object doesn't use super(), so we can't either.
873
874
def __init__(self, bus = None, *args, **kwargs):
875
self._approvals_pending = 0
1781
1782
def __init__(self, bus=None, *args, **kwargs):
876
1783
self.bus = bus
877
1784
Client.__init__(self, *args, **kwargs)
878
1785
# Only now, when this client is initialized, can it show up on
879
1786
# the D-Bus
880
client_object_name = unicode(self.name).translate(
1787
client_object_name = str(self.name).translate(
881
1788
{ord("."): ord("_"),
882
1789
ord("-"): ord("_")})
883
self.dbus_object_path = (dbus.ObjectPath
884
("/clients/" + client_object_name))
1790
self.dbus_object_path = dbus.ObjectPath(
1791
"/clients/" + client_object_name)
885
1792
DBusObjectWithProperties.__init__(self, self.bus,
886
1793
self.dbus_object_path)
887
888
def notifychangeproperty(transform_func,
889
dbus_name, type_func=lambda x: x,
890
variant_level=1):
1794
1795
def notifychangeproperty(transform_func, dbus_name,
1796
type_func=lambda x: x,
1797
variant_level=1,
1798
invalidate_only=False,
1799
_interface=_interface):
891
1800
""" Modify a variable so that it's a property which announces
892
1801
its changes to DBus.
893
1802
894
transform_fun: Function that takes a value and transforms it
895
to a D-Bus type.
1803
transform_fun: Function that takes a value and a variant_level
1804
and transforms it to a D-Bus type.
896
1805
dbus_name: D-Bus name of the variable
897
1806
type_func: Function that transform the value before sending it
898
1807
to the D-Bus. Default: no transform
899
1808
variant_level: D-Bus variant level. Default: 1
900
1809
"""
901
attrname = "_{0}".format(dbus_name)
1810
attrname = "_{}".format(dbus_name)
1811
902
1812
def setter(self, value):
903
1813
if hasattr(self, "dbus_object_path"):
904
1814
if (not hasattr(self, attrname) or
905
1815
type_func(getattr(self, attrname, None))
906
1816
!= type_func(value)):
907
dbus_value = transform_func(type_func(value),
908
variant_level)
909
self.PropertyChanged(dbus.String(dbus_name),
910
dbus_value)
1817
if invalidate_only:
1818
self.PropertiesChanged(
1819
_interface, dbus.Dictionary(),
1820
dbus.Array((dbus_name, )))
1821
else:
1822
dbus_value = transform_func(
1823
type_func(value),
1824
variant_level=variant_level)
1825
self.PropertyChanged(dbus.String(dbus_name),
1826
dbus_value)
1827
self.PropertiesChanged(
1828
_interface,
1829
dbus.Dictionary({dbus.String(dbus_name):
1830
dbus_value}),
1831
dbus.Array())
911
1832
setattr(self, attrname, value)
912
1833
913
1834
return property(lambda self: getattr(self, attrname), setter)
914
915
1835
916
1836
expires = notifychangeproperty(datetime_to_dbus, "Expires")
917
1837
approvals_pending = notifychangeproperty(dbus.Boolean,
918
1838
"ApprovalPending",
919
type_func = bool)
1839
type_func=bool)
920
1840
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
921
1841
last_enabled = notifychangeproperty(datetime_to_dbus,
922
1842
"LastEnabled")
923
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
924
type_func = lambda checker:
925
checker is not None)
1843
checker = notifychangeproperty(
1844
dbus.Boolean, "CheckerRunning",
1845
type_func=lambda checker: checker is not None)
926
1846
last_checked_ok = notifychangeproperty(datetime_to_dbus,
927
1847
"LastCheckedOK")
1848
last_checker_status = notifychangeproperty(dbus.Int16,
1849
"LastCheckerStatus")
928
1850
last_approval_request = notifychangeproperty(
929
1851
datetime_to_dbus, "LastApprovalRequest")
930
1852
approved_by_default = notifychangeproperty(dbus.Boolean,
931
1853
"ApprovedByDefault")
932
approval_delay = notifychangeproperty(dbus.UInt16,
933
"ApprovalDelay",
934
type_func =
935
_timedelta_to_milliseconds)
1854
approval_delay = notifychangeproperty(
1855
dbus.UInt64, "ApprovalDelay",
1856
type_func=lambda td: td.total_seconds() * 1000)
936
1857
approval_duration = notifychangeproperty(
937
dbus.UInt16, "ApprovalDuration",
938
type_func = _timedelta_to_milliseconds)
1858
dbus.UInt64, "ApprovalDuration",
1859
type_func=lambda td: td.total_seconds() * 1000)
939
1860
host = notifychangeproperty(dbus.String, "Host")
940
timeout = notifychangeproperty(dbus.UInt16, "Timeout",
941
type_func =
942
_timedelta_to_milliseconds)
1861
timeout = notifychangeproperty(
1862
dbus.UInt64, "Timeout",
1863
type_func=lambda td: td.total_seconds() * 1000)
943
1864
extended_timeout = notifychangeproperty(
944
dbus.UInt16, "ExtendedTimeout",
945
type_func = _timedelta_to_milliseconds)
946
interval = notifychangeproperty(dbus.UInt16,
947
"Interval",
948
type_func =
949
_timedelta_to_milliseconds)
1865
dbus.UInt64, "ExtendedTimeout",
1866
type_func=lambda td: td.total_seconds() * 1000)
1867
interval = notifychangeproperty(
1868
dbus.UInt64, "Interval",
1869
type_func=lambda td: td.total_seconds() * 1000)
950
1870
checker_command = notifychangeproperty(dbus.String, "Checker")
951
1871
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1872
invalidate_only=True)
1873
952
1874
del notifychangeproperty
953
1875
954
1876
def __del__(self, *args, **kwargs):
955
1877
try:
956
1878
self.remove_from_connection()
959
1881
if hasattr(DBusObjectWithProperties, "__del__"):
960
1882
DBusObjectWithProperties.__del__(self, *args, **kwargs)
961
1883
Client.__del__(self, *args, **kwargs)
962
963
def checker_callback(self, pid, condition, command,
964
*args, **kwargs):
965
self.checker_callback_tag = None
966
self.checker = None
967
if os.WIFEXITED(condition):
968
exitstatus = os.WEXITSTATUS(condition)
1884
1885
def checker_callback(self, source, condition,
1886
connection, command, *args, **kwargs):
1887
ret = Client.checker_callback(self, source, condition,
1888
connection, command, *args,
1889
**kwargs)
1890
exitstatus = self.last_checker_status
1891
if exitstatus >= 0:
969
1892
# Emit D-Bus signal
970
1893
self.CheckerCompleted(dbus.Int16(exitstatus),
971
dbus.Int64(condition),
1894
# This is specific to GNU libC
1895
dbus.Int64(exitstatus << 8),
972
1896
dbus.String(command))
973
1897
else:
974
1898
# Emit D-Bus signal
975
1899
self.CheckerCompleted(dbus.Int16(-1),
976
dbus.Int64(condition),
1900
dbus.Int64(
1901
# This is specific to GNU libC
1902
(exitstatus << 8)
1903
| self.last_checker_signal),
977
1904
dbus.String(command))
978
979
return Client.checker_callback(self, pid, condition, command,
980
*args, **kwargs)
981
1905
return ret
1906
982
1907
def start_checker(self, *args, **kwargs):
983
old_checker = self.checker
984
if self.checker is not None:
985
old_checker_pid = self.checker.pid
986
else:
987
old_checker_pid = None
1908
old_checker_pid = getattr(self.checker, "pid", None)
988
1909
r = Client.start_checker(self, *args, **kwargs)
989
1910
# Only if new checker process was started
990
1911
if (self.checker is not None
992
1913
# Emit D-Bus signal
993
1914
self.CheckerStarted(self.current_checker_command)
994
1915
return r
995
1916
996
1917
def _reset_approved(self):
997
self._approved = None
1918
self.approved = None
998
1919
return False
999
1920
1000
1921
def approve(self, value=True):
1922
self.approved = value
1923
GLib.timeout_add(int(self.approval_duration.total_seconds()
1924
* 1000), self._reset_approved)
1001
1925
self.send_changedstate()
1002
self._approved = value
1003
gobject.timeout_add(_timedelta_to_milliseconds
1004
(self.approval_duration),
1005
self._reset_approved)
1006
1007
1008
## D-Bus methods, signals & properties
1009
_interface = "se.recompile.Mandos.Client"
1010
1011
## Signals
1012
1926
1927
# D-Bus methods, signals & properties
1928
1929
# Interfaces
1930
1931
# Signals
1932
1013
1933
# CheckerCompleted - signal
1014
1934
@dbus.service.signal(_interface, signature="nxs")
1015
1935
def CheckerCompleted(self, exitcode, waitstatus, command):
1016
1936
"D-Bus signal"
1017
1937
pass
1018
1938
1019
1939
# CheckerStarted - signal
1020
1940
@dbus.service.signal(_interface, signature="s")
1021
1941
def CheckerStarted(self, command):
1022
1942
"D-Bus signal"
1023
1943
pass
1024
1944
1025
1945
# PropertyChanged - signal
1946
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1026
1947
@dbus.service.signal(_interface, signature="sv")
1027
1948
def PropertyChanged(self, property, value):
1028
1949
"D-Bus signal"
1029
1950
pass
1030
1951
1031
1952
# GotSecret - signal
1032
1953
@dbus.service.signal(_interface)
1033
1954
def GotSecret(self):
1036
1957
server to mandos-client
1037
1958
"""
1038
1959
pass
1039
1960
1040
1961
# Rejected - signal
1041
1962
@dbus.service.signal(_interface, signature="s")
1042
1963
def Rejected(self, reason):
1043
1964
"D-Bus signal"
1044
1965
pass
1045
1966
1046
1967
# NeedApproval - signal
1047
1968
@dbus.service.signal(_interface, signature="tb")
1048
1969
def NeedApproval(self, timeout, default):
1049
1970
"D-Bus signal"
1050
1971
return self.need_approval()
1051
1052
## Methods
1053
1972
1973
# Methods
1974
1054
1975
# Approve - method
1055
1976
@dbus.service.method(_interface, in_signature="b")
1056
1977
def Approve(self, value):
1057
1978
self.approve(value)
1058
1979
1059
1980
# CheckedOK - method
1060
1981
@dbus.service.method(_interface)
1061
1982
def CheckedOK(self):
1062
1983
self.checked_ok()
1063
1984
1064
1985
# Enable - method
1986
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1065
1987
@dbus.service.method(_interface)
1066
1988
def Enable(self):
1067
1989
"D-Bus method"
1068
1990
self.enable()
1069
1991
1070
1992
# StartChecker - method
1993
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1071
1994
@dbus.service.method(_interface)
1072
1995
def StartChecker(self):
1073
1996
"D-Bus method"
1074
1997
self.start_checker()
1075
1998
1076
1999
# Disable - method
2000
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1077
2001
@dbus.service.method(_interface)
1078
2002
def Disable(self):
1079
2003
"D-Bus method"
1080
2004
self.disable()
1081
2005
1082
2006
# StopChecker - method
2007
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1083
2008
@dbus.service.method(_interface)
1084
2009
def StopChecker(self):
1085
2010
self.stop_checker()
1086
1087
## Properties
1088
2011
2012
# Properties
2013
1089
2014
# ApprovalPending - property
1090
2015
@dbus_service_property(_interface, signature="b", access="read")
1091
2016
def ApprovalPending_dbus_property(self):
1092
2017
return dbus.Boolean(bool(self.approvals_pending))
1093
2018
1094
2019
# ApprovedByDefault - property
1095
@dbus_service_property(_interface, signature="b",
2020
@dbus_service_property(_interface,
2021
signature="b",
1096
2022
access="readwrite")
1097
2023
def ApprovedByDefault_dbus_property(self, value=None):
1098
2024
if value is None: # get
1099
2025
return dbus.Boolean(self.approved_by_default)
1100
2026
self.approved_by_default = bool(value)
1101
2027
1102
2028
# ApprovalDelay - property
1103
@dbus_service_property(_interface, signature="t",
2029
@dbus_service_property(_interface,
2030
signature="t",
1104
2031
access="readwrite")
1105
2032
def ApprovalDelay_dbus_property(self, value=None):
1106
2033
if value is None: # get
1107
return dbus.UInt64(self.approval_delay_milliseconds())
2034
return dbus.UInt64(self.approval_delay.total_seconds()
2035
* 1000)
1108
2036
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1109
2037
1110
2038
# ApprovalDuration - property
1111
@dbus_service_property(_interface, signature="t",
2039
@dbus_service_property(_interface,
2040
signature="t",
1112
2041
access="readwrite")
1113
2042
def ApprovalDuration_dbus_property(self, value=None):
1114
2043
if value is None: # get
1115
return dbus.UInt64(_timedelta_to_milliseconds(
1116
self.approval_duration))
2044
return dbus.UInt64(self.approval_duration.total_seconds()
2045
* 1000)
1117
2046
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1118
2047
1119
2048
# Name - property
2049
@dbus_annotations(
2050
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1120
2051
@dbus_service_property(_interface, signature="s", access="read")
1121
2052
def Name_dbus_property(self):
1122
2053
return dbus.String(self.name)
1123
2054
2055
# KeyID - property
2056
@dbus_annotations(
2057
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2058
@dbus_service_property(_interface, signature="s", access="read")
2059
def KeyID_dbus_property(self):
2060
return dbus.String(self.key_id)
2061
1124
2062
# Fingerprint - property
2063
@dbus_annotations(
2064
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1125
2065
@dbus_service_property(_interface, signature="s", access="read")
1126
2066
def Fingerprint_dbus_property(self):
1127
2067
return dbus.String(self.fingerprint)
1128
2068
1129
2069
# Host - property
1130
@dbus_service_property(_interface, signature="s",
2070
@dbus_service_property(_interface,
2071
signature="s",
1131
2072
access="readwrite")
1132
2073
def Host_dbus_property(self, value=None):
1133
2074
if value is None: # get
1134
2075
return dbus.String(self.host)
1135
self.host = value
1136
2076
self.host = str(value)
2077
1137
2078
# Created - property
2079
@dbus_annotations(
2080
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1138
2081
@dbus_service_property(_interface, signature="s", access="read")
1139
2082
def Created_dbus_property(self):
1140
return dbus.String(datetime_to_dbus(self.created))
1141
2083
return datetime_to_dbus(self.created)
2084
1142
2085
# LastEnabled - property
1143
2086
@dbus_service_property(_interface, signature="s", access="read")
1144
2087
def LastEnabled_dbus_property(self):
1145
2088
return datetime_to_dbus(self.last_enabled)
1146
2089
1147
2090
# Enabled - property
1148
@dbus_service_property(_interface, signature="b",
2091
@dbus_service_property(_interface,
2092
signature="b",
1149
2093
access="readwrite")
1150
2094
def Enabled_dbus_property(self, value=None):
1151
2095
if value is None: # get
1154
2098
self.enable()
1155
2099
else:
1156
2100
self.disable()
1157
2101
1158
2102
# LastCheckedOK - property
1159
@dbus_service_property(_interface, signature="s",
2103
@dbus_service_property(_interface,
2104
signature="s",
1160
2105
access="readwrite")
1161
2106
def LastCheckedOK_dbus_property(self, value=None):
1162
2107
if value is not None:
1163
2108
self.checked_ok()
1164
2109
return
1165
2110
return datetime_to_dbus(self.last_checked_ok)
1166
2111
2112
# LastCheckerStatus - property
2113
@dbus_service_property(_interface, signature="n", access="read")
2114
def LastCheckerStatus_dbus_property(self):
2115
return dbus.Int16(self.last_checker_status)
2116
1167
2117
# Expires - property
1168
2118
@dbus_service_property(_interface, signature="s", access="read")
1169
2119
def Expires_dbus_property(self):
1170
2120
return datetime_to_dbus(self.expires)
1171
2121
1172
2122
# LastApprovalRequest - property
1173
2123
@dbus_service_property(_interface, signature="s", access="read")
1174
2124
def LastApprovalRequest_dbus_property(self):
1175
2125
return datetime_to_dbus(self.last_approval_request)
1176
2126
1177
2127
# Timeout - property
1178
@dbus_service_property(_interface, signature="t",
2128
@dbus_service_property(_interface,
2129
signature="t",
1179
2130
access="readwrite")
1180
2131
def Timeout_dbus_property(self, value=None):
1181
2132
if value is None: # get
1182
return dbus.UInt64(self.timeout_milliseconds())
2133
return dbus.UInt64(self.timeout.total_seconds() * 1000)
2134
old_timeout = self.timeout
1183
2135
self.timeout = datetime.timedelta(0, 0, 0, value)
1184
if getattr(self, "disable_initiator_tag", None) is None:
1185
return
1186
# Reschedule timeout
1187
gobject.source_remove(self.disable_initiator_tag)
1188
self.disable_initiator_tag = None
1189
self.expires = None
1190
time_to_die = (self.
1191
_timedelta_to_milliseconds((self
1192
.last_checked_ok
1193
+ self.timeout)
1194
- datetime.datetime
1195
.utcnow()))
1196
if time_to_die <= 0:
1197
# The timeout has passed
1198
self.disable()
1199
else:
1200
self.expires = (datetime.datetime.utcnow()
1201
+ datetime.timedelta(milliseconds =
1202
time_to_die))
1203
self.disable_initiator_tag = (gobject.timeout_add
1204
(time_to_die, self.disable))
1205
2136
# Reschedule disabling
2137
if self.enabled:
2138
now = datetime.datetime.utcnow()
2139
self.expires += self.timeout - old_timeout
2140
if self.expires <= now:
2141
# The timeout has passed
2142
self.disable()
2143
else:
2144
if (getattr(self, "disable_initiator_tag", None)
2145
is None):
2146
return
2147
GLib.source_remove(self.disable_initiator_tag)
2148
self.disable_initiator_tag = GLib.timeout_add(
2149
int((self.expires - now).total_seconds() * 1000),
2150
self.disable)
2151
1206
2152
# ExtendedTimeout - property
1207
@dbus_service_property(_interface, signature="t",
2153
@dbus_service_property(_interface,
2154
signature="t",
1208
2155
access="readwrite")
1209
2156
def ExtendedTimeout_dbus_property(self, value=None):
1210
2157
if value is None: # get
1211
return dbus.UInt64(self.extended_timeout_milliseconds())
2158
return dbus.UInt64(self.extended_timeout.total_seconds()
2159
* 1000)
1212
2160
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1213
2161
1214
2162
# Interval - property
1215
@dbus_service_property(_interface, signature="t",
2163
@dbus_service_property(_interface,
2164
signature="t",
1216
2165
access="readwrite")
1217
2166
def Interval_dbus_property(self, value=None):
1218
2167
if value is None: # get
1219
return dbus.UInt64(self.interval_milliseconds())
2168
return dbus.UInt64(self.interval.total_seconds() * 1000)
1220
2169
self.interval = datetime.timedelta(0, 0, 0, value)
1221
2170
if getattr(self, "checker_initiator_tag", None) is None:
1222
2171
return
1223
# Reschedule checker run
1224
gobject.source_remove(self.checker_initiator_tag)
1225
self.checker_initiator_tag = (gobject.timeout_add
1226
(value, self.start_checker))
1227
self.start_checker() # Start one now, too
1228
2172
if self.enabled:
2173
# Reschedule checker run
2174
GLib.source_remove(self.checker_initiator_tag)
2175
self.checker_initiator_tag = GLib.timeout_add(
2176
value, self.start_checker)
2177
self.start_checker() # Start one now, too
2178
1229
2179
# Checker - property
1230
@dbus_service_property(_interface, signature="s",
2180
@dbus_service_property(_interface,
2181
signature="s",
1231
2182
access="readwrite")
1232
2183
def Checker_dbus_property(self, value=None):
1233
2184
if value is None: # get
1234
2185
return dbus.String(self.checker_command)
1235
self.checker_command = value
1236
2186
self.checker_command = str(value)
2187
1237
2188
# CheckerRunning - property
1238
@dbus_service_property(_interface, signature="b",
2189
@dbus_service_property(_interface,
2190
signature="b",
1239
2191
access="readwrite")
1240
2192
def CheckerRunning_dbus_property(self, value=None):
1241
2193
if value is None: # get
1244
2196
self.start_checker()
1245
2197
else:
1246
2198
self.stop_checker()
1247
2199
1248
2200
# ObjectPath - property
2201
@dbus_annotations(
2202
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
2203
"org.freedesktop.DBus.Deprecated": "true"})
1249
2204
@dbus_service_property(_interface, signature="o", access="read")
1250
2205
def ObjectPath_dbus_property(self):
1251
return self.dbus_object_path # is already a dbus.ObjectPath
1252
2206
return self.dbus_object_path # is already a dbus.ObjectPath
2207
1253
2208
# Secret = property
1254
@dbus_service_property(_interface, signature="ay",
1255
access="write", byte_arrays=True)
2209
@dbus_annotations(
2210
{"org.freedesktop.DBus.Property.EmitsChangedSignal":
2211
"invalidates"})
2212
@dbus_service_property(_interface,
2213
signature="ay",
2214
access="write",
2215
byte_arrays=True)
1256
2216
def Secret_dbus_property(self, value):
1257
self.secret = str(value)
1258
2217
self.secret = bytes(value)
2218
1259
2219
del _interface
1260
2220
1261
2221
1262
2222
class ProxyClient(object):
1263
def __init__(self, child_pipe, fpr, address):
2223
def __init__(self, child_pipe, key_id, fpr, address):
1264
2224
self._pipe = child_pipe
1265
self._pipe.send(('init', fpr, address))
2225
self._pipe.send(('init', key_id, fpr, address))
1266
2226
if not self._pipe.recv():
1267
raise KeyError()
1268
2227
raise KeyError(key_id or fpr)
2228
1269
2229
def __getattribute__(self, name):
1270
if(name == '_pipe'):
2230
if name == '_pipe':
1271
2231
return super(ProxyClient, self).__getattribute__(name)
1272
2232
self._pipe.send(('getattr', name))
1273
2233
data = self._pipe.recv()
1274
2234
if data[0] == 'data':
1275
2235
return data[1]
1276
2236
if data[0] == 'function':
2237
1277
2238
def func(*args, **kwargs):
1278
2239
self._pipe.send(('funcall', name, args, kwargs))
1279
2240
return self._pipe.recv()[1]
2241
1280
2242
return func
1281
2243
1282
2244
def __setattr__(self, name, value):
1283
if(name == '_pipe'):
2245
if name == '_pipe':
1284
2246
return super(ProxyClient, self).__setattr__(name, value)
1285
2247
self._pipe.send(('setattr', name, value))
1286
2248
1287
class ClientDBusTransitional(ClientDBus):
1288
__metaclass__ = AlternateDBusNamesMetaclass
1289
2249
1290
2250
class ClientHandler(socketserver.BaseRequestHandler, object):
1291
2251
"""A class to handle client connections.
1292
2252
1293
2253
Instantiated once for each connection to handle it.
1294
2254
Note: This will run in its own forked process."""
1295
2255
1296
2256
def handle(self):
1297
2257
with contextlib.closing(self.server.child_pipe) as child_pipe:
1298
2258
logger.info("TCP connection from: %s",
1299
unicode(self.client_address))
2259
str(self.client_address))
1300
2260
logger.debug("Pipe FD: %d",
1301
2261
self.server.child_pipe.fileno())
1302
1303
session = (gnutls.connection
1304
.ClientSession(self.request,
1305
gnutls.connection
1306
.X509Credentials()))
1307
1308
# Note: gnutls.connection.X509Credentials is really a
1309
# generic GnuTLS certificate credentials object so long as
1310
# no X.509 keys are added to it. Therefore, we can use it
1311
# here despite using OpenPGP certificates.
1312
1313
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1314
# "+AES-256-CBC", "+SHA1",
1315
# "+COMP-NULL", "+CTYPE-OPENPGP",
1316
# "+DHE-DSS"))
2262
2263
session = gnutls.ClientSession(self.request)
2264
2265
# priority = ':'.join(("NONE", "+VERS-TLS1.1",
2266
# "+AES-256-CBC", "+SHA1",
2267
# "+COMP-NULL", "+CTYPE-OPENPGP",
2268
# "+DHE-DSS"))
1317
2269
# Use a fallback default, since this MUST be set.
1318
2270
priority = self.server.gnutls_priority
1319
2271
if priority is None:
1320
2272
priority = "NORMAL"
1321
(gnutls.library.functions
1322
.gnutls_priority_set_direct(session._c_object,
1323
priority, None))
1324
2273
gnutls.priority_set_direct(session._c_object,
2274
priority.encode("utf-8"),
2275
None)
2276
1325
2277
# Start communication using the Mandos protocol
1326
2278
# Get protocol number
1327
2279
line = self.request.makefile().readline()
1328
2280
logger.debug("Protocol version: %r", line)
1329
2281
try:
1330
2282
if int(line.strip().split()[0]) > 1:
1331
raise RuntimeError
2283
raise RuntimeError(line)
1332
2284
except (ValueError, IndexError, RuntimeError) as error:
1333
2285
logger.error("Unknown protocol version: %s", error)
1334
2286
return
1335
2287
1336
2288
# Start GnuTLS connection
1337
2289
try:
1338
2290
session.handshake()
1339
except gnutls.errors.GNUTLSError as error:
2291
except gnutls.Error as error:
1340
2292
logger.warning("Handshake failed: %s", error)
1341
2293
# Do not run session.bye() here: the session is not
1342
2294
# established. Just abandon the request.
1343
2295
return
1344
2296
logger.debug("Handshake succeeded")
1345
2297
1346
2298
approval_required = False
1347
2299
try:
1348
try:
1349
fpr = self.fingerprint(self.peer_certificate
1350
(session))
1351
except (TypeError,
1352
gnutls.errors.GNUTLSError) as error:
1353
logger.warning("Bad certificate: %s", error)
1354
return
1355
logger.debug("Fingerprint: %s", fpr)
1356
1357
try:
1358
client = ProxyClient(child_pipe, fpr,
2300
if gnutls.has_rawpk:
2301
fpr = ""
2302
try:
2303
key_id = self.key_id(
2304
self.peer_certificate(session))
2305
except (TypeError, gnutls.Error) as error:
2306
logger.warning("Bad certificate: %s", error)
2307
return
2308
logger.debug("Key ID: %s", key_id)
2309
2310
else:
2311
key_id = ""
2312
try:
2313
fpr = self.fingerprint(
2314
self.peer_certificate(session))
2315
except (TypeError, gnutls.Error) as error:
2316
logger.warning("Bad certificate: %s", error)
2317
return
2318
logger.debug("Fingerprint: %s", fpr)
2319
2320
try:
2321
client = ProxyClient(child_pipe, key_id, fpr,
1359
2322
self.client_address)
1360
2323
except KeyError:
1361
2324
return
1362
2325
1363
2326
if client.approval_delay:
1364
2327
delay = client.approval_delay
1365
2328
client.approvals_pending += 1
1366
2329
approval_required = True
1367
2330
1368
2331
while True:
1369
2332
if not client.enabled:
1370
2333
logger.info("Client %s is disabled",
1371
client.name)
2334
client.name)
1372
2335
if self.server.use_dbus:
1373
2336
# Emit D-Bus signal
1374
2337
client.Rejected("Disabled")
1375
2338
return
1376
1377
if client._approved or not client.approval_delay:
1378
#We are approved or approval is disabled
2339
2340
if client.approved or not client.approval_delay:
2341
# We are approved or approval is disabled
1379
2342
break
1380
elif client._approved is None:
2343
elif client.approved is None:
1381
2344
logger.info("Client %s needs approval",
1382
2345
client.name)
1383
2346
if self.server.use_dbus:
1384
2347
# Emit D-Bus signal
1385
2348
client.NeedApproval(
1386
client.approval_delay_milliseconds(),
1387
client.approved_by_default)
2349
client.approval_delay.total_seconds()
2350
* 1000, client.approved_by_default)
1388
2351
else:
1389
2352
logger.warning("Client %s was not approved",
1390
2353
client.name)
1392
2355
# Emit D-Bus signal
1393
2356
client.Rejected("Denied")
1394
2357
return
1395
1396
#wait until timeout or approved
1397
#x = float(client
1398
# ._timedelta_to_milliseconds(delay))
2358
2359
# wait until timeout or approved
1399
2360
time = datetime.datetime.now()
1400
2361
client.changedstate.acquire()
1401
(client.changedstate.wait
1402
(float(client._timedelta_to_milliseconds(delay)
1403
/ 1000)))
2362
client.changedstate.wait(delay.total_seconds())
1404
2363
client.changedstate.release()
1405
2364
time2 = datetime.datetime.now()
1406
2365
if (time2 - time) >= delay:
1416
2375
break
1417
2376
else:
1418
2377
delay -= time2 - time
1419
1420
sent_size = 0
1421
while sent_size < len(client.secret):
1422
try:
1423
sent = session.send(client.secret[sent_size:])
1424
except gnutls.errors.GNUTLSError as error:
1425
logger.warning("gnutls send failed")
1426
return
1427
logger.debug("Sent: %d, remaining: %d",
1428
sent, len(client.secret)
1429
- (sent_size + sent))
1430
sent_size += sent
1431
2378
2379
try:
2380
session.send(client.secret)
2381
except gnutls.Error as error:
2382
logger.warning("gnutls send failed",
2383
exc_info=error)
2384
return
2385
1432
2386
logger.info("Sending secret to %s", client.name)
1433
# bump the timeout as if seen
1434
client.checked_ok(client.extended_timeout)
2387
# bump the timeout using extended_timeout
2388
client.bump_timeout(client.extended_timeout)
1435
2389
if self.server.use_dbus:
1436
2390
# Emit D-Bus signal
1437
2391
client.GotSecret()
1438
2392
1439
2393
finally:
1440
2394
if approval_required:
1441
2395
client.approvals_pending -= 1
1442
2396
try:
1443
2397
session.bye()
1444
except gnutls.errors.GNUTLSError as error:
1445
logger.warning("GnuTLS bye failed")
1446
2398
except gnutls.Error as error:
2399
logger.warning("GnuTLS bye failed",
2400
exc_info=error)
2401
1447
2402
@staticmethod
1448
2403
def peer_certificate(session):
1449
"Return the peer's OpenPGP certificate as a bytestring"
1450
# If not an OpenPGP certificate...
1451
if (gnutls.library.functions
1452
.gnutls_certificate_type_get(session._c_object)
1453
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1454
# ...do the normal thing
1455
return session.peer_certificate
2404
"Return the peer's certificate as a bytestring"
2405
try:
2406
cert_type = gnutls.certificate_type_get2(session._c_object,
2407
gnutls.CTYPE_PEERS)
2408
except AttributeError:
2409
cert_type = gnutls.certificate_type_get(session._c_object)
2410
if gnutls.has_rawpk:
2411
valid_cert_types = frozenset((gnutls.CRT_RAWPK,))
2412
else:
2413
valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))
2414
# If not a valid certificate type...
2415
if cert_type not in valid_cert_types:
2416
logger.info("Cert type %r not in %r", cert_type,
2417
valid_cert_types)
2418
# ...return invalid data
2419
return b""
1456
2420
list_size = ctypes.c_uint(1)
1457
cert_list = (gnutls.library.functions
1458
.gnutls_certificate_get_peers
2421
cert_list = (gnutls.certificate_get_peers
1459
2422
(session._c_object, ctypes.byref(list_size)))
1460
2423
if not bool(cert_list) and list_size.value != 0:
1461
raise gnutls.errors.GNUTLSError("error getting peer"
1462
" certificate")
2424
raise gnutls.Error("error getting peer certificate")
1463
2425
if list_size.value == 0:
1464
2426
return None
1465
2427
cert = cert_list[0]
1466
2428
return ctypes.string_at(cert.data, cert.size)
1467
2429
2430
@staticmethod
2431
def key_id(certificate):
2432
"Convert a certificate bytestring to a hexdigit key ID"
2433
# New GnuTLS "datum" with the public key
2434
datum = gnutls.datum_t(
2435
ctypes.cast(ctypes.c_char_p(certificate),
2436
ctypes.POINTER(ctypes.c_ubyte)),
2437
ctypes.c_uint(len(certificate)))
2438
# XXX all these need to be created in the gnutls "module"
2439
# New empty GnuTLS certificate
2440
pubkey = gnutls.pubkey_t()
2441
gnutls.pubkey_init(ctypes.byref(pubkey))
2442
# Import the raw public key into the certificate
2443
gnutls.pubkey_import(pubkey,
2444
ctypes.byref(datum),
2445
gnutls.X509_FMT_DER)
2446
# New buffer for the key ID
2447
buf = ctypes.create_string_buffer(32)
2448
buf_len = ctypes.c_size_t(len(buf))
2449
# Get the key ID from the raw public key into the buffer
2450
gnutls.pubkey_get_key_id(pubkey,
2451
gnutls.KEYID_USE_SHA256,
2452
ctypes.cast(ctypes.byref(buf),
2453
ctypes.POINTER(ctypes.c_ubyte)),
2454
ctypes.byref(buf_len))
2455
# Deinit the certificate
2456
gnutls.pubkey_deinit(pubkey)
2457
2458
# Convert the buffer to a Python bytestring
2459
key_id = ctypes.string_at(buf, buf_len.value)
2460
# Convert the bytestring to hexadecimal notation
2461
hex_key_id = binascii.hexlify(key_id).upper()
2462
return hex_key_id
2463
1468
2464
@staticmethod
1469
2465
def fingerprint(openpgp):
1470
2466
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1471
2467
# New GnuTLS "datum" with the OpenPGP public key
1472
datum = (gnutls.library.types
1473
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1474
ctypes.POINTER
1475
(ctypes.c_ubyte)),
1476
ctypes.c_uint(len(openpgp))))
2468
datum = gnutls.datum_t(
2469
ctypes.cast(ctypes.c_char_p(openpgp),
2470
ctypes.POINTER(ctypes.c_ubyte)),
2471
ctypes.c_uint(len(openpgp)))
1477
2472
# New empty GnuTLS certificate
1478
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1479
(gnutls.library.functions
1480
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
2473
crt = gnutls.openpgp_crt_t()
2474
gnutls.openpgp_crt_init(ctypes.byref(crt))
1481
2475
# Import the OpenPGP public key into the certificate
1482
(gnutls.library.functions
1483
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1484
gnutls.library.constants
1485
.GNUTLS_OPENPGP_FMT_RAW))
2476
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2477
gnutls.OPENPGP_FMT_RAW)
1486
2478
# Verify the self signature in the key
1487
2479
crtverify = ctypes.c_uint()
1488
(gnutls.library.functions
1489
.gnutls_openpgp_crt_verify_self(crt, 0,
1490
ctypes.byref(crtverify)))
2480
gnutls.openpgp_crt_verify_self(crt, 0,
2481
ctypes.byref(crtverify))
1491
2482
if crtverify.value != 0:
1492
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1493
raise (gnutls.errors.CertificateSecurityError
1494
("Verify failed"))
2483
gnutls.openpgp_crt_deinit(crt)
2484
raise gnutls.CertificateSecurityError(code
2485
=crtverify.value)
1495
2486
# New buffer for the fingerprint
1496
2487
buf = ctypes.create_string_buffer(20)
1497
2488
buf_len = ctypes.c_size_t()
1498
2489
# Get the fingerprint from the certificate into the buffer
1499
(gnutls.library.functions
1500
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1501
ctypes.byref(buf_len)))
2490
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2491
ctypes.byref(buf_len))
1502
2492
# Deinit the certificate
1503
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2493
gnutls.openpgp_crt_deinit(crt)
1504
2494
# Convert the buffer to a Python bytestring
1505
2495
fpr = ctypes.string_at(buf, buf_len.value)
1506
2496
# Convert the bytestring to hexadecimal notation
1507
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
2497
hex_fpr = binascii.hexlify(fpr).upper()
1508
2498
return hex_fpr
1509
2499
1510
2500
1511
2501
class MultiprocessingMixIn(object):
1512
2502
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2503
1513
2504
def sub_process_main(self, request, address):
1514
2505
try:
1515
2506
self.finish_request(request, address)
1516
except:
2507
except Exception:
1517
2508
self.handle_error(request, address)
1518
2509
self.close_request(request)
1519
2510
1520
2511
def process_request(self, request, address):
1521
2512
"""Start a new process to process the request."""
1522
multiprocessing.Process(target = self.sub_process_main,
1523
args = (request, address)).start()
2513
proc = multiprocessing.Process(target=self.sub_process_main,
2514
args=(request, address))
2515
proc.start()
2516
return proc
1524
2517
1525
2518
1526
2519
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1527
2520
""" adds a pipe to the MixIn """
2521
1528
2522
def process_request(self, request, client_address):
1529
2523
"""Overrides and wraps the original process_request().
1530
2524
1531
2525
This function creates a new pipe in self.pipe
1532
2526
"""
1533
2527
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1534
1535
super(MultiprocessingMixInWithPipe,
1536
self).process_request(request, client_address)
2528
2529
proc = MultiprocessingMixIn.process_request(self, request,
2530
client_address)
1537
2531
self.child_pipe.close()
1538
self.add_pipe(parent_pipe)
1539
1540
def add_pipe(self, parent_pipe):
2532
self.add_pipe(parent_pipe, proc)
2533
2534
def add_pipe(self, parent_pipe, proc):
1541
2535
"""Dummy function; override as necessary"""
1542
raise NotImplementedError
2536
raise NotImplementedError()
1543
2537
1544
2538
1545
2539
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1546
2540
socketserver.TCPServer, object):
1547
2541
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1548
2542
1549
2543
Attributes:
1550
2544
enabled: Boolean; whether this server is activated yet
1551
2545
interface: None or a network interface name (string)
1552
2546
use_ipv6: Boolean; to use IPv6 or not
1553
2547
"""
2548
1554
2549
def __init__(self, server_address, RequestHandlerClass,
1555
interface=None, use_ipv6=True):
2550
interface=None,
2551
use_ipv6=True,
2552
socketfd=None):
2553
"""If socketfd is set, use that file descriptor instead of
2554
creating a new one with socket.socket().
2555
"""
1556
2556
self.interface = interface
1557
2557
if use_ipv6:
1558
2558
self.address_family = socket.AF_INET6
2559
if socketfd is not None:
2560
# Save the file descriptor
2561
self.socketfd = socketfd
2562
# Save the original socket.socket() function
2563
self.socket_socket = socket.socket
2564
2565
# To implement --socket, we monkey patch socket.socket.
2566
#
2567
# (When socketserver.TCPServer is a new-style class, we
2568
# could make self.socket into a property instead of monkey
2569
# patching socket.socket.)
2570
#
2571
# Create a one-time-only replacement for socket.socket()
2572
@functools.wraps(socket.socket)
2573
def socket_wrapper(*args, **kwargs):
2574
# Restore original function so subsequent calls are
2575
# not affected.
2576
socket.socket = self.socket_socket
2577
del self.socket_socket
2578
# This time only, return a new socket object from the
2579
# saved file descriptor.
2580
return socket.fromfd(self.socketfd, *args, **kwargs)
2581
# Replace socket.socket() function with wrapper
2582
socket.socket = socket_wrapper
2583
# The socketserver.TCPServer.__init__ will call
2584
# socket.socket(), which might be our replacement,
2585
# socket_wrapper(), if socketfd was set.
1559
2586
socketserver.TCPServer.__init__(self, server_address,
1560
2587
RequestHandlerClass)
2588
1561
2589
def server_bind(self):
1562
2590
"""This overrides the normal server_bind() function
1563
2591
to bind to an interface if one was specified, and also NOT to
1564
2592
bind to an address or port if they were not specified."""
2593
global SO_BINDTODEVICE
1565
2594
if self.interface is not None:
1566
2595
if SO_BINDTODEVICE is None:
1567
logger.error("SO_BINDTODEVICE does not exist;"
1568
" cannot bind to interface %s",
1569
self.interface)
1570
else:
1571
try:
1572
self.socket.setsockopt(socket.SOL_SOCKET,
1573
SO_BINDTODEVICE,
1574
str(self.interface
1575
+ '\0'))
1576
except socket.error as error:
1577
if error[0] == errno.EPERM:
1578
logger.error("No permission to"
1579
" bind to interface %s",
1580
self.interface)
1581
elif error[0] == errno.ENOPROTOOPT:
1582
logger.error("SO_BINDTODEVICE not available;"
1583
" cannot bind to interface %s",
1584
self.interface)
1585
else:
1586
raise
2596
# Fall back to a hard-coded value which seems to be
2597
# common enough.
2598
logger.warning("SO_BINDTODEVICE not found, trying 25")
2599
SO_BINDTODEVICE = 25
2600
try:
2601
self.socket.setsockopt(
2602
socket.SOL_SOCKET, SO_BINDTODEVICE,
2603
(self.interface + "\0").encode("utf-8"))
2604
except socket.error as error:
2605
if error.errno == errno.EPERM:
2606
logger.error("No permission to bind to"
2607
" interface %s", self.interface)
2608
elif error.errno == errno.ENOPROTOOPT:
2609
logger.error("SO_BINDTODEVICE not available;"
2610
" cannot bind to interface %s",
2611
self.interface)
2612
elif error.errno == errno.ENODEV:
2613
logger.error("Interface %s does not exist,"
2614
" cannot bind", self.interface)
2615
else:
2616
raise
1587
2617
# Only bind(2) the socket if we really need to.
1588
2618
if self.server_address[0] or self.server_address[1]:
1589
2619
if not self.server_address[0]:
1590
2620
if self.address_family == socket.AF_INET6:
1591
any_address = "::" # in6addr_any
2621
any_address = "::" # in6addr_any
1592
2622
else:
1593
any_address = socket.INADDR_ANY
2623
any_address = "0.0.0.0" # INADDR_ANY
1594
2624
self.server_address = (any_address,
1595
2625
self.server_address[1])
1596
2626
elif not self.server_address[1]:
1597
self.server_address = (self.server_address[0],
1598
0)
2627
self.server_address = (self.server_address[0], 0)
1599
2628
# if self.interface:
1600
2629
# self.server_address = (self.server_address[0],
1601
2630
# 0, # port
1607
2636
1608
2637
class MandosServer(IPv6_TCPServer):
1609
2638
"""Mandos server.
1610
2639
1611
2640
Attributes:
1612
2641
clients: set of Client objects
1613
2642
gnutls_priority GnuTLS priority string
1614
2643
use_dbus: Boolean; to emit D-Bus signals or not
1615
1616
Assumes a gobject.MainLoop event loop.
2644
2645
Assumes a GLib.MainLoop event loop.
1617
2646
"""
2647
1618
2648
def __init__(self, server_address, RequestHandlerClass,
1619
interface=None, use_ipv6=True, clients=None,
1620
gnutls_priority=None, use_dbus=True):
2649
interface=None,
2650
use_ipv6=True,
2651
clients=None,
2652
gnutls_priority=None,
2653
use_dbus=True,
2654
socketfd=None):
1621
2655
self.enabled = False
1622
2656
self.clients = clients
1623
2657
if self.clients is None:
1624
self.clients = set()
2658
self.clients = {}
1625
2659
self.use_dbus = use_dbus
1626
2660
self.gnutls_priority = gnutls_priority
1627
2661
IPv6_TCPServer.__init__(self, server_address,
1628
2662
RequestHandlerClass,
1629
interface = interface,
1630
use_ipv6 = use_ipv6)
2663
interface=interface,
2664
use_ipv6=use_ipv6,
2665
socketfd=socketfd)
2666
1631
2667
def server_activate(self):
1632
2668
if self.enabled:
1633
2669
return socketserver.TCPServer.server_activate(self)
2670
1634
2671
def enable(self):
1635
2672
self.enabled = True
1636
def add_pipe(self, parent_pipe):
2673
2674
def add_pipe(self, parent_pipe, proc):
1637
2675
# Call "handle_ipc" for both data and EOF events
1638
gobject.io_add_watch(parent_pipe.fileno(),
1639
gobject.IO_IN | gobject.IO_HUP,
1640
functools.partial(self.handle_ipc,
1641
parent_pipe =
1642
parent_pipe))
1643
1644
def handle_ipc(self, source, condition, parent_pipe=None,
2676
GLib.io_add_watch(
2677
parent_pipe.fileno(),
2678
GLib.IO_IN | GLib.IO_HUP,
2679
functools.partial(self.handle_ipc,
2680
parent_pipe=parent_pipe,
2681
proc=proc))
2682
2683
def handle_ipc(self, source, condition,
2684
parent_pipe=None,
2685
proc=None,
1645
2686
client_object=None):
1646
condition_names = {
1647
gobject.IO_IN: "IN", # There is data to read.
1648
gobject.IO_OUT: "OUT", # Data can be written (without
1649
# blocking).
1650
gobject.IO_PRI: "PRI", # There is urgent data to read.
1651
gobject.IO_ERR: "ERR", # Error condition.
1652
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1653
# broken, usually for pipes and
1654
# sockets).
1655
}
1656
conditions_string = ' | '.join(name
1657
for cond, name in
1658
condition_names.iteritems()
1659
if cond & condition)
1660
# error or the other end of multiprocessing.Pipe has closed
1661
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
2687
# error, or the other end of multiprocessing.Pipe has closed
2688
if condition & (GLib.IO_ERR | GLib.IO_HUP):
2689
# Wait for other process to exit
2690
proc.join()
1662
2691
return False
1663
2692
1664
2693
# Read a request from the child
1665
2694
request = parent_pipe.recv()
1666
2695
command = request[0]
1667
2696
1668
2697
if command == 'init':
1669
fpr = request[1]
1670
address = request[2]
1671
1672
for c in self.clients:
1673
if c.fingerprint == fpr:
2698
key_id = request[1].decode("ascii")
2699
fpr = request[2].decode("ascii")
2700
address = request[3]
2701
2702
for c in self.clients.values():
2703
if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":
2704
continue
2705
if key_id and c.key_id == key_id:
2706
client = c
2707
break
2708
if fpr and c.fingerprint == fpr:
1674
2709
client = c
1675
2710
break
1676
2711
else:
1677
logger.info("Client not found for fingerprint: %s, ad"
1678
"dress: %s", fpr, address)
2712
logger.info("Client not found for key ID: %s, address"
2713
": %s", key_id or fpr, address)
1679
2714
if self.use_dbus:
1680
2715
# Emit D-Bus signal
1681
mandos_dbus_service.ClientNotFound(fpr,
2716
mandos_dbus_service.ClientNotFound(key_id or fpr,
1682
2717
address[0])
1683
2718
parent_pipe.send(False)
1684
2719
return False
1685
1686
gobject.io_add_watch(parent_pipe.fileno(),
1687
gobject.IO_IN | gobject.IO_HUP,
1688
functools.partial(self.handle_ipc,
1689
parent_pipe =
1690
parent_pipe,
1691
client_object =
1692
client))
2720
2721
GLib.io_add_watch(
2722
parent_pipe.fileno(),
2723
GLib.IO_IN | GLib.IO_HUP,
2724
functools.partial(self.handle_ipc,
2725
parent_pipe=parent_pipe,
2726
proc=proc,
2727
client_object=client))
1693
2728
parent_pipe.send(True)
1694
2729
# remove the old hook in favor of the new above hook on
1695
2730
# same fileno
1698
2733
funcname = request[1]
1699
2734
args = request[2]
1700
2735
kwargs = request[3]
1701
2736
1702
2737
parent_pipe.send(('data', getattr(client_object,
1703
2738
funcname)(*args,
1704
**kwargs)))
1705
2739
**kwargs)))
2740
1706
2741
if command == 'getattr':
1707
2742
attrname = request[1]
1708
if callable(client_object.__getattribute__(attrname)):
1709
parent_pipe.send(('function',))
2743
if isinstance(client_object.__getattribute__(attrname),
2744
collections.Callable):
2745
parent_pipe.send(('function', ))
1710
2746
else:
1711
parent_pipe.send(('data', client_object
1712
.__getattribute__(attrname)))
1713
2747
parent_pipe.send((
2748
'data', client_object.__getattribute__(attrname)))
2749
1714
2750
if command == 'setattr':
1715
2751
attrname = request[1]
1716
2752
value = request[2]
1717
2753
setattr(client_object, attrname, value)
1718
2754
1719
2755
return True
1720
2756
1721
2757
2758
def rfc3339_duration_to_delta(duration):
2759
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2760
2761
>>> rfc3339_duration_to_delta("P7D")
2762
datetime.timedelta(7)
2763
>>> rfc3339_duration_to_delta("PT60S")
2764
datetime.timedelta(0, 60)
2765
>>> rfc3339_duration_to_delta("PT60M")
2766
datetime.timedelta(0, 3600)
2767
>>> rfc3339_duration_to_delta("PT24H")
2768
datetime.timedelta(1)
2769
>>> rfc3339_duration_to_delta("P1W")
2770
datetime.timedelta(7)
2771
>>> rfc3339_duration_to_delta("PT5M30S")
2772
datetime.timedelta(0, 330)
2773
>>> rfc3339_duration_to_delta("P1DT3M20S")
2774
datetime.timedelta(1, 200)
2775
"""
2776
2777
# Parsing an RFC 3339 duration with regular expressions is not
2778
# possible - there would have to be multiple places for the same
2779
# values, like seconds. The current code, while more esoteric, is
2780
# cleaner without depending on a parsing library. If Python had a
2781
# built-in library for parsing we would use it, but we'd like to
2782
# avoid excessive use of external libraries.
2783
2784
# New type for defining tokens, syntax, and semantics all-in-one
2785
Token = collections.namedtuple("Token", (
2786
"regexp", # To match token; if "value" is not None, must have
2787
# a "group" containing digits
2788
"value", # datetime.timedelta or None
2789
"followers")) # Tokens valid after this token
2790
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2791
# the "duration" ABNF definition in RFC 3339, Appendix A.
2792
token_end = Token(re.compile(r"$"), None, frozenset())
2793
token_second = Token(re.compile(r"(\d+)S"),
2794
datetime.timedelta(seconds=1),
2795
frozenset((token_end, )))
2796
token_minute = Token(re.compile(r"(\d+)M"),
2797
datetime.timedelta(minutes=1),
2798
frozenset((token_second, token_end)))
2799
token_hour = Token(re.compile(r"(\d+)H"),
2800
datetime.timedelta(hours=1),
2801
frozenset((token_minute, token_end)))
2802
token_time = Token(re.compile(r"T"),
2803
None,
2804
frozenset((token_hour, token_minute,
2805
token_second)))
2806
token_day = Token(re.compile(r"(\d+)D"),
2807
datetime.timedelta(days=1),
2808
frozenset((token_time, token_end)))
2809
token_month = Token(re.compile(r"(\d+)M"),
2810
datetime.timedelta(weeks=4),
2811
frozenset((token_day, token_end)))
2812
token_year = Token(re.compile(r"(\d+)Y"),
2813
datetime.timedelta(weeks=52),
2814
frozenset((token_month, token_end)))
2815
token_week = Token(re.compile(r"(\d+)W"),
2816
datetime.timedelta(weeks=1),
2817
frozenset((token_end, )))
2818
token_duration = Token(re.compile(r"P"), None,
2819
frozenset((token_year, token_month,
2820
token_day, token_time,
2821
token_week)))
2822
# Define starting values:
2823
# Value so far
2824
value = datetime.timedelta()
2825
found_token = None
2826
# Following valid tokens
2827
followers = frozenset((token_duration, ))
2828
# String left to parse
2829
s = duration
2830
# Loop until end token is found
2831
while found_token is not token_end:
2832
# Search for any currently valid tokens
2833
for token in followers:
2834
match = token.regexp.match(s)
2835
if match is not None:
2836
# Token found
2837
if token.value is not None:
2838
# Value found, parse digits
2839
factor = int(match.group(1), 10)
2840
# Add to value so far
2841
value += factor * token.value
2842
# Strip token from string
2843
s = token.regexp.sub("", s, 1)
2844
# Go to found token
2845
found_token = token
2846
# Set valid next tokens
2847
followers = found_token.followers
2848
break
2849
else:
2850
# No currently valid tokens were found
2851
raise ValueError("Invalid RFC 3339 duration: {!r}"
2852
.format(duration))
2853
# End token found
2854
return value
2855
2856
1722
2857
def string_to_delta(interval):
1723
2858
"""Parse a string and return a datetime.timedelta
1724
2859
1725
2860
>>> string_to_delta('7d')
1726
2861
datetime.timedelta(7)
1727
2862
>>> string_to_delta('60s')
1735
2870
>>> string_to_delta('5m 30s')
1736
2871
datetime.timedelta(0, 330)
1737
2872
"""
2873
2874
try:
2875
return rfc3339_duration_to_delta(interval)
2876
except ValueError:
2877
pass
2878
1738
2879
timevalue = datetime.timedelta(0)
1739
2880
for s in interval.split():
1740
2881
try:
1741
suffix = unicode(s[-1])
2882
suffix = s[-1]
1742
2883
value = int(s[:-1])
1743
2884
if suffix == "d":
1744
2885
delta = datetime.timedelta(value)
1751
2892
elif suffix == "w":
1752
2893
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1753
2894
else:
1754
raise ValueError("Unknown suffix %r" % suffix)
1755
except (ValueError, IndexError) as e:
2895
raise ValueError("Unknown suffix {!r}".format(suffix))
2896
except IndexError as e:
1756
2897
raise ValueError(*(e.args))
1757
2898
timevalue += delta
1758
2899
return timevalue
1759
2900
1760
2901
1761
def if_nametoindex(interface):
1762
"""Call the C function if_nametoindex(), or equivalent
1763
1764
Note: This function cannot accept a unicode string."""
1765
global if_nametoindex
1766
try:
1767
if_nametoindex = (ctypes.cdll.LoadLibrary
1768
(ctypes.util.find_library("c"))
1769
.if_nametoindex)
1770
except (OSError, AttributeError):
1771
logger.warning("Doing if_nametoindex the hard way")
1772
def if_nametoindex(interface):
1773
"Get an interface index the hard way, i.e. using fcntl()"
1774
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1775
with contextlib.closing(socket.socket()) as s:
1776
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1777
struct.pack(str("16s16x"),
1778
interface))
1779
interface_index = struct.unpack(str("I"),
1780
ifreq[16:20])[0]
1781
return interface_index
1782
return if_nametoindex(interface)
1783
1784
1785
def daemon(nochdir = False, noclose = False):
2902
def daemon(nochdir=False, noclose=False):
1786
2903
"""See daemon(3). Standard BSD Unix function.
1787
2904
1788
2905
This should really exist as os.daemon, but it doesn't (yet)."""
1789
2906
if os.fork():
1790
2907
sys.exit()
1795
2912
sys.exit()
1796
2913
if not noclose:
1797
2914
# Close all standard open file descriptors
1798
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2915
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1799
2916
if not stat.S_ISCHR(os.fstat(null).st_mode):
1800
2917
raise OSError(errno.ENODEV,
1801
"%s not a character device"
1802
% os.path.devnull)
2918
"{} not a character device"
2919
.format(os.devnull))
1803
2920
os.dup2(null, sys.stdin.fileno())
1804
2921
os.dup2(null, sys.stdout.fileno())
1805
2922
os.dup2(null, sys.stderr.fileno())
1808
2925
1809
2926
1810
2927
def main():
1811
2928
1812
2929
##################################################################
1813
2930
# Parsing of options, both command line and config file
1814
2931
1815
2932
parser = argparse.ArgumentParser()
1816
2933
parser.add_argument("-v", "--version", action="version",
1817
version = "%%(prog)s %s" % version,
2934
version="%(prog)s {}".format(version),
1818
2935
help="show version number and exit")
1819
2936
parser.add_argument("-i", "--interface", metavar="IF",
1820
2937
help="Bind to interface IF")
1826
2943
help="Run self-test")
1827
2944
parser.add_argument("--debug", action="store_true",
1828
2945
help="Debug mode; run in foreground and log"
1829
" to terminal")
2946
" to terminal", default=None)
1830
2947
parser.add_argument("--debuglevel", metavar="LEVEL",
1831
2948
help="Debug level for stdout output")
1832
2949
parser.add_argument("--priority", help="GnuTLS"
1839
2956
" files")
1840
2957
parser.add_argument("--no-dbus", action="store_false",
1841
2958
dest="use_dbus", help="Do not provide D-Bus"
1842
" system bus interface")
2959
" system bus interface", default=None)
1843
2960
parser.add_argument("--no-ipv6", action="store_false",
1844
dest="use_ipv6", help="Do not use IPv6")
2961
dest="use_ipv6", help="Do not use IPv6",
2962
default=None)
2963
parser.add_argument("--no-restore", action="store_false",
2964
dest="restore", help="Do not restore stored"
2965
" state", default=None)
2966
parser.add_argument("--socket", type=int,
2967
help="Specify a file descriptor to a network"
2968
" socket to use instead of creating one")
2969
parser.add_argument("--statedir", metavar="DIR",
2970
help="Directory to save/restore state in")
2971
parser.add_argument("--foreground", action="store_true",
2972
help="Run in foreground", default=None)
2973
parser.add_argument("--no-zeroconf", action="store_false",
2974
dest="zeroconf", help="Do not use Zeroconf",
2975
default=None)
2976
1845
2977
options = parser.parse_args()
1846
2978
1847
2979
if options.check:
1848
2980
import doctest
1849
doctest.testmod()
1850
sys.exit()
1851
2981
fail_count, test_count = doctest.testmod()
2982
sys.exit(os.EX_OK if fail_count == 0 else 1)
2983
1852
2984
# Default values for config file for server-global settings
1853
server_defaults = { "interface": "",
1854
"address": "",
1855
"port": "",
1856
"debug": "False",
1857
"priority":
1858
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1859
"servicename": "Mandos",
1860
"use_dbus": "True",
1861
"use_ipv6": "True",
1862
"debuglevel": "",
1863
}
1864
2985
if gnutls.has_rawpk:
2986
priority = ("SECURE128:!CTYPE-X.509:+CTYPE-RAWPK:!RSA"
2987
":!VERS-ALL:+VERS-TLS1.3:%PROFILE_ULTRA")
2988
else:
2989
priority = ("SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2990
":+SIGN-DSA-SHA256")
2991
server_defaults = {"interface": "",
2992
"address": "",
2993
"port": "",
2994
"debug": "False",
2995
"priority": priority,
2996
"servicename": "Mandos",
2997
"use_dbus": "True",
2998
"use_ipv6": "True",
2999
"debuglevel": "",
3000
"restore": "True",
3001
"socket": "",
3002
"statedir": "/var/lib/mandos",
3003
"foreground": "False",
3004
"zeroconf": "True",
3005
}
3006
del priority
3007
1865
3008
# Parse config file for server-global settings
1866
3009
server_config = configparser.SafeConfigParser(server_defaults)
1867
3010
del server_defaults
1868
server_config.read(os.path.join(options.configdir,
1869
"mandos.conf"))
3011
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1870
3012
# Convert the SafeConfigParser object to a dict
1871
3013
server_settings = server_config.defaults()
1872
3014
# Use the appropriate methods on the non-string config options
1873
for option in ("debug", "use_dbus", "use_ipv6"):
3015
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3016
"foreground", "zeroconf"):
1874
3017
server_settings[option] = server_config.getboolean("DEFAULT",
1875
3018
option)
1876
3019
if server_settings["port"]:
1877
3020
server_settings["port"] = server_config.getint("DEFAULT",
1878
3021
"port")
3022
if server_settings["socket"]:
3023
server_settings["socket"] = server_config.getint("DEFAULT",
3024
"socket")
3025
# Later, stdin will, and stdout and stderr might, be dup'ed
3026
# over with an opened os.devnull. But we don't want this to
3027
# happen with a supplied network socket.
3028
if 0 <= server_settings["socket"] <= 2:
3029
server_settings["socket"] = os.dup(server_settings
3030
["socket"])
1879
3031
del server_config
1880
3032
1881
3033
# Override the settings from the config file with command line
1882
3034
# options, if set.
1883
3035
for option in ("interface", "address", "port", "debug",
1884
"priority", "servicename", "configdir",
1885
"use_dbus", "use_ipv6", "debuglevel"):
3036
"priority", "servicename", "configdir", "use_dbus",
3037
"use_ipv6", "debuglevel", "restore", "statedir",
3038
"socket", "foreground", "zeroconf"):
1886
3039
value = getattr(options, option)
1887
3040
if value is not None:
1888
3041
server_settings[option] = value
1889
3042
del options
1890
3043
# Force all strings to be unicode
1891
3044
for option in server_settings.keys():
1892
if type(server_settings[option]) is str:
1893
server_settings[option] = unicode(server_settings[option])
3045
if isinstance(server_settings[option], bytes):
3046
server_settings[option] = (server_settings[option]
3047
.decode("utf-8"))
3048
# Force all boolean options to be boolean
3049
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3050
"foreground", "zeroconf"):
3051
server_settings[option] = bool(server_settings[option])
3052
# Debug implies foreground
3053
if server_settings["debug"]:
3054
server_settings["foreground"] = True
1894
3055
# Now we have our good server settings in "server_settings"
1895
3056
1896
3057
##################################################################
1897
3058
3059
if (not server_settings["zeroconf"]
3060
and not (server_settings["port"]
3061
or server_settings["socket"] != "")):
3062
parser.error("Needs port or socket to work without Zeroconf")
3063
1898
3064
# For convenience
1899
3065
debug = server_settings["debug"]
1900
3066
debuglevel = server_settings["debuglevel"]
1901
3067
use_dbus = server_settings["use_dbus"]
1902
3068
use_ipv6 = server_settings["use_ipv6"]
1903
3069
stored_state_path = os.path.join(server_settings["statedir"],
3070
stored_state_file)
3071
foreground = server_settings["foreground"]
3072
zeroconf = server_settings["zeroconf"]
3073
3074
if debug:
3075
initlogger(debug, logging.DEBUG)
3076
else:
3077
if not debuglevel:
3078
initlogger(debug)
3079
else:
3080
level = getattr(logging, debuglevel.upper())
3081
initlogger(debug, level)
3082
1904
3083
if server_settings["servicename"] != "Mandos":
1905
syslogger.setFormatter(logging.Formatter
1906
('Mandos (%s) [%%(process)d]:'
1907
' %%(levelname)s: %%(message)s'
1908
% server_settings["servicename"]))
1909
3084
syslogger.setFormatter(
3085
logging.Formatter('Mandos ({}) [%(process)d]:'
3086
' %(levelname)s: %(message)s'.format(
3087
server_settings["servicename"])))
3088
1910
3089
# Parse config file with clients
1911
client_defaults = { "timeout": "5m",
1912
"extended_timeout": "15m",
1913
"interval": "2m",
1914
"checker": "fping -q -- %%(host)s",
1915
"host": "",
1916
"approval_delay": "0s",
1917
"approval_duration": "1s",
1918
}
1919
client_config = configparser.SafeConfigParser(client_defaults)
3090
client_config = configparser.SafeConfigParser(Client
3091
.client_defaults)
1920
3092
client_config.read(os.path.join(server_settings["configdir"],
1921
3093
"clients.conf"))
1922
3094
1923
3095
global mandos_dbus_service
1924
3096
mandos_dbus_service = None
1925
1926
tcp_server = MandosServer((server_settings["address"],
1927
server_settings["port"]),
1928
ClientHandler,
1929
interface=(server_settings["interface"]
1930
or None),
1931
use_ipv6=use_ipv6,
1932
gnutls_priority=
1933
server_settings["priority"],
1934
use_dbus=use_dbus)
1935
if not debug:
1936
pidfilename = "/var/run/mandos.pid"
1937
try:
1938
pidfile = open(pidfilename, "w")
1939
except IOError:
1940
logger.error("Could not open file %r", pidfilename)
1941
1942
try:
1943
uid = pwd.getpwnam("_mandos").pw_uid
1944
gid = pwd.getpwnam("_mandos").pw_gid
1945
except KeyError:
1946
try:
1947
uid = pwd.getpwnam("mandos").pw_uid
1948
gid = pwd.getpwnam("mandos").pw_gid
3097
3098
socketfd = None
3099
if server_settings["socket"] != "":
3100
socketfd = server_settings["socket"]
3101
tcp_server = MandosServer(
3102
(server_settings["address"], server_settings["port"]),
3103
ClientHandler,
3104
interface=(server_settings["interface"] or None),
3105
use_ipv6=use_ipv6,
3106
gnutls_priority=server_settings["priority"],
3107
use_dbus=use_dbus,
3108
socketfd=socketfd)
3109
if not foreground:
3110
pidfilename = "/run/mandos.pid"
3111
if not os.path.isdir("/run/."):
3112
pidfilename = "/var/run/mandos.pid"
3113
pidfile = None
3114
try:
3115
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
3116
except IOError as e:
3117
logger.error("Could not open file %r", pidfilename,
3118
exc_info=e)
3119
3120
for name, group in (("_mandos", "_mandos"),
3121
("mandos", "mandos"),
3122
("nobody", "nogroup")):
3123
try:
3124
uid = pwd.getpwnam(name).pw_uid
3125
gid = pwd.getpwnam(group).pw_gid
3126
break
1949
3127
except KeyError:
1950
try:
1951
uid = pwd.getpwnam("nobody").pw_uid
1952
gid = pwd.getpwnam("nobody").pw_gid
1953
except KeyError:
1954
uid = 65534
1955
gid = 65534
3128
continue
3129
else:
3130
uid = 65534
3131
gid = 65534
1956
3132
try:
1957
3133
os.setgid(gid)
1958
3134
os.setuid(uid)
3135
if debug:
3136
logger.debug("Did setuid/setgid to {}:{}".format(uid,
3137
gid))
1959
3138
except OSError as error:
1960
if error[0] != errno.EPERM:
1961
raise error
1962
1963
if not debug and not debuglevel:
1964
syslogger.setLevel(logging.WARNING)
1965
console.setLevel(logging.WARNING)
1966
if debuglevel:
1967
level = getattr(logging, debuglevel.upper())
1968
syslogger.setLevel(level)
1969
console.setLevel(level)
1970
3139
logger.warning("Failed to setuid/setgid to {}:{}: {}"
3140
.format(uid, gid, os.strerror(error.errno)))
3141
if error.errno != errno.EPERM:
3142
raise
3143
1971
3144
if debug:
1972
3145
# Enable all possible GnuTLS debugging
1973
3146
1974
3147
# "Use a log level over 10 to enable all debugging options."
1975
3148
# - GnuTLS manual
1976
gnutls.library.functions.gnutls_global_set_log_level(11)
1977
1978
@gnutls.library.types.gnutls_log_func
3149
gnutls.global_set_log_level(11)
3150
3151
@gnutls.log_func
1979
3152
def debug_gnutls(level, string):
1980
3153
logger.debug("GnuTLS: %s", string[:-1])
1981
1982
(gnutls.library.functions
1983
.gnutls_global_set_log_function(debug_gnutls))
1984
3154
3155
gnutls.global_set_log_function(debug_gnutls)
3156
1985
3157
# Redirect stdin so all checkers get /dev/null
1986
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
3158
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1987
3159
os.dup2(null, sys.stdin.fileno())
1988
3160
if null > 2:
1989
3161
os.close(null)
1990
else:
1991
# No console logging
1992
logger.removeHandler(console)
1993
3162
1994
3163
# Need to fork before connecting to D-Bus
1995
if not debug:
3164
if not foreground:
1996
3165
# Close all input and output, do double fork, etc.
1997
3166
daemon()
1998
3167
3168
# multiprocessing will use threads, so before we use GLib we need
3169
# to inform GLib that threads will be used.
3170
GLib.threads_init()
3171
1999
3172
global main_loop
2000
3173
# From the Avahi example code
2001
DBusGMainLoop(set_as_default=True )
2002
main_loop = gobject.MainLoop()
3174
DBusGMainLoop(set_as_default=True)
3175
main_loop = GLib.MainLoop()
2003
3176
bus = dbus.SystemBus()
2004
3177
# End of Avahi example code
2005
3178
if use_dbus:
2006
3179
try:
2007
3180
bus_name = dbus.service.BusName("se.recompile.Mandos",
2008
bus, do_not_queue=True)
2009
old_bus_name = (dbus.service.BusName
2010
("se.bsnet.fukt.Mandos", bus,
2011
do_not_queue=True))
2012
except dbus.exceptions.NameExistsException as e:
2013
logger.error(unicode(e) + ", disabling D-Bus")
3181
bus,
3182
do_not_queue=True)
3183
old_bus_name = dbus.service.BusName(
3184
"se.bsnet.fukt.Mandos", bus,
3185
do_not_queue=True)
3186
except dbus.exceptions.DBusException as e:
3187
logger.error("Disabling D-Bus:", exc_info=e)
2014
3188
use_dbus = False
2015
3189
server_settings["use_dbus"] = False
2016
3190
tcp_server.use_dbus = False
2017
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2018
service = AvahiService(name = server_settings["servicename"],
2019
servicetype = "_mandos._tcp",
2020
protocol = protocol, bus = bus)
2021
if server_settings["interface"]:
2022
service.interface = (if_nametoindex
2023
(str(server_settings["interface"])))
2024
3191
if zeroconf:
3192
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3193
service = AvahiServiceToSyslog(
3194
name=server_settings["servicename"],
3195
servicetype="_mandos._tcp",
3196
protocol=protocol,
3197
bus=bus)
3198
if server_settings["interface"]:
3199
service.interface = if_nametoindex(
3200
server_settings["interface"].encode("utf-8"))
3201
2025
3202
global multiprocessing_manager
2026
3203
multiprocessing_manager = multiprocessing.Manager()
2027
3204
2028
3205
client_class = Client
2029
3206
if use_dbus:
2030
client_class = functools.partial(ClientDBusTransitional,
2031
bus = bus)
2032
def client_config_items(config, section):
2033
special_settings = {
2034
"approved_by_default":
2035
lambda: config.getboolean(section,
2036
"approved_by_default"),
2037
}
2038
for name, value in config.items(section):
3207
client_class = functools.partial(ClientDBus, bus=bus)
3208
3209
client_settings = Client.config_parser(client_config)
3210
old_client_settings = {}
3211
clients_data = {}
3212
3213
# This is used to redirect stdout and stderr for checker processes
3214
global wnull
3215
wnull = open(os.devnull, "w") # A writable /dev/null
3216
# Only used if server is running in foreground but not in debug
3217
# mode
3218
if debug or not foreground:
3219
wnull.close()
3220
3221
# Get client data and settings from last running state.
3222
if server_settings["restore"]:
3223
try:
3224
with open(stored_state_path, "rb") as stored_state:
3225
if sys.version_info.major == 2:
3226
clients_data, old_client_settings = pickle.load(
3227
stored_state)
3228
else:
3229
bytes_clients_data, bytes_old_client_settings = (
3230
pickle.load(stored_state, encoding="bytes"))
3231
# Fix bytes to strings
3232
# clients_data
3233
# .keys()
3234
clients_data = {(key.decode("utf-8")
3235
if isinstance(key, bytes)
3236
else key): value
3237
for key, value in
3238
bytes_clients_data.items()}
3239
del bytes_clients_data
3240
for key in clients_data:
3241
value = {(k.decode("utf-8")
3242
if isinstance(k, bytes) else k): v
3243
for k, v in
3244
clients_data[key].items()}
3245
clients_data[key] = value
3246
# .client_structure
3247
value["client_structure"] = [
3248
(s.decode("utf-8")
3249
if isinstance(s, bytes)
3250
else s) for s in
3251
value["client_structure"]]
3252
# .name & .host
3253
for k in ("name", "host"):
3254
if isinstance(value[k], bytes):
3255
value[k] = value[k].decode("utf-8")
3256
if not value.has_key("key_id"):
3257
value["key_id"] = ""
3258
elif not value.has_key("fingerprint"):
3259
value["fingerprint"] = ""
3260
# old_client_settings
3261
# .keys()
3262
old_client_settings = {
3263
(key.decode("utf-8")
3264
if isinstance(key, bytes)
3265
else key): value
3266
for key, value in
3267
bytes_old_client_settings.items()}
3268
del bytes_old_client_settings
3269
# .host
3270
for value in old_client_settings.values():
3271
if isinstance(value["host"], bytes):
3272
value["host"] = (value["host"]
3273
.decode("utf-8"))
3274
os.remove(stored_state_path)
3275
except IOError as e:
3276
if e.errno == errno.ENOENT:
3277
logger.warning("Could not load persistent state:"
3278
" {}".format(os.strerror(e.errno)))
3279
else:
3280
logger.critical("Could not load persistent state:",
3281
exc_info=e)
3282
raise
3283
except EOFError as e:
3284
logger.warning("Could not load persistent state: "
3285
"EOFError:",
3286
exc_info=e)
3287
3288
with PGPEngine() as pgp:
3289
for client_name, client in clients_data.items():
3290
# Skip removed clients
3291
if client_name not in client_settings:
3292
continue
3293
3294
# Decide which value to use after restoring saved state.
3295
# We have three different values: Old config file,
3296
# new config file, and saved state.
3297
# New config value takes precedence if it differs from old
3298
# config value, otherwise use saved state.
3299
for name, value in client_settings[client_name].items():
3300
try:
3301
# For each value in new config, check if it
3302
# differs from the old config value (Except for
3303
# the "secret" attribute)
3304
if (name != "secret"
3305
and (value !=
3306
old_client_settings[client_name][name])):
3307
client[name] = value
3308
except KeyError:
3309
pass
3310
3311
# Clients who has passed its expire date can still be
3312
# enabled if its last checker was successful. A Client
3313
# whose checker succeeded before we stored its state is
3314
# assumed to have successfully run all checkers during
3315
# downtime.
3316
if client["enabled"]:
3317
if datetime.datetime.utcnow() >= client["expires"]:
3318
if not client["last_checked_ok"]:
3319
logger.warning(
3320
"disabling client {} - Client never "
3321
"performed a successful checker".format(
3322
client_name))
3323
client["enabled"] = False
3324
elif client["last_checker_status"] != 0:
3325
logger.warning(
3326
"disabling client {} - Client last"
3327
" checker failed with error code"
3328
" {}".format(
3329
client_name,
3330
client["last_checker_status"]))
3331
client["enabled"] = False
3332
else:
3333
client["expires"] = (
3334
datetime.datetime.utcnow()
3335
+ client["timeout"])
3336
logger.debug("Last checker succeeded,"
3337
" keeping {} enabled".format(
3338
client_name))
2039
3339
try:
2040
yield (name, special_settings[name]())
2041
except KeyError:
2042
yield (name, value)
2043
2044
tcp_server.clients.update(set(
2045
client_class(name = section,
2046
config= dict(client_config_items(
2047
client_config, section)))
2048
for section in client_config.sections()))
3340
client["secret"] = pgp.decrypt(
3341
client["encrypted_secret"],
3342
client_settings[client_name]["secret"])
3343
except PGPError:
3344
# If decryption fails, we use secret from new settings
3345
logger.debug("Failed to decrypt {} old secret".format(
3346
client_name))
3347
client["secret"] = (client_settings[client_name]
3348
["secret"])
3349
3350
# Add/remove clients based on new changes made to config
3351
for client_name in (set(old_client_settings)
3352
- set(client_settings)):
3353
del clients_data[client_name]
3354
for client_name in (set(client_settings)
3355
- set(old_client_settings)):
3356
clients_data[client_name] = client_settings[client_name]
3357
3358
# Create all client objects
3359
for client_name, client in clients_data.items():
3360
tcp_server.clients[client_name] = client_class(
3361
name=client_name,
3362
settings=client,
3363
server_settings=server_settings)
3364
2049
3365
if not tcp_server.clients:
2050
3366
logger.warning("No clients defined")
2051
2052
if not debug:
2053
try:
2054
with pidfile:
2055
pid = os.getpid()
2056
pidfile.write(str(pid) + "\n".encode("utf-8"))
2057
del pidfile
2058
except IOError:
2059
logger.error("Could not write to file %r with PID %d",
2060
pidfilename, pid)
2061
except NameError:
2062
# "pidfile" was never created
2063
pass
3367
3368
if not foreground:
3369
if pidfile is not None:
3370
pid = os.getpid()
3371
try:
3372
with pidfile:
3373
print(pid, file=pidfile)
3374
except IOError:
3375
logger.error("Could not write to file %r with PID %d",
3376
pidfilename, pid)
3377
del pidfile
2064
3378
del pidfilename
2065
2066
signal.signal(signal.SIGINT, signal.SIG_IGN)
2067
2068
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2069
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2070
3379
3380
for termsig in (signal.SIGHUP, signal.SIGTERM):
3381
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3382
lambda: main_loop.quit() and False)
3383
2071
3384
if use_dbus:
2072
class MandosDBusService(dbus.service.Object):
3385
3386
@alternate_dbus_interfaces(
3387
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3388
class MandosDBusService(DBusObjectWithObjectManager):
2073
3389
"""A D-Bus proxy object"""
3390
2074
3391
def __init__(self):
2075
3392
dbus.service.Object.__init__(self, bus, "/")
3393
2076
3394
_interface = "se.recompile.Mandos"
2077
3395
2078
3396
@dbus.service.signal(_interface, signature="o")
2079
3397
def ClientAdded(self, objpath):
2080
3398
"D-Bus signal"
2081
3399
pass
2082
3400
2083
3401
@dbus.service.signal(_interface, signature="ss")
2084
def ClientNotFound(self, fingerprint, address):
3402
def ClientNotFound(self, key_id, address):
2085
3403
"D-Bus signal"
2086
3404
pass
2087
3405
3406
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3407
"true"})
2088
3408
@dbus.service.signal(_interface, signature="os")
2089
3409
def ClientRemoved(self, objpath, name):
2090
3410
"D-Bus signal"
2091
3411
pass
2092
3412
3413
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3414
"true"})
2093
3415
@dbus.service.method(_interface, out_signature="ao")
2094
3416
def GetAllClients(self):
2095
3417
"D-Bus method"
2096
return dbus.Array(c.dbus_object_path
2097
for c in tcp_server.clients)
2098
3418
return dbus.Array(c.dbus_object_path for c in
3419
tcp_server.clients.values())
3420
3421
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3422
"true"})
2099
3423
@dbus.service.method(_interface,
2100
3424
out_signature="a{oa{sv}}")
2101
3425
def GetAllClientsWithProperties(self):
2102
3426
"D-Bus method"
2103
3427
return dbus.Dictionary(
2104
((c.dbus_object_path, c.GetAll(""))
2105
for c in tcp_server.clients),
3428
{c.dbus_object_path: c.GetAll(
3429
"se.recompile.Mandos.Client")
3430
for c in tcp_server.clients.values()},
2106
3431
signature="oa{sv}")
2107
3432
2108
3433
@dbus.service.method(_interface, in_signature="o")
2109
3434
def RemoveClient(self, object_path):
2110
3435
"D-Bus method"
2111
for c in tcp_server.clients:
3436
for c in tcp_server.clients.values():
2112
3437
if c.dbus_object_path == object_path:
2113
tcp_server.clients.remove(c)
3438
del tcp_server.clients[c.name]
2114
3439
c.remove_from_connection()
2115
# Don't signal anything except ClientRemoved
3440
# Don't signal the disabling
2116
3441
c.disable(quiet=True)
2117
# Emit D-Bus signal
2118
self.ClientRemoved(object_path, c.name)
3442
# Emit D-Bus signal for removal
3443
self.client_removed_signal(c)
2119
3444
return
2120
3445
raise KeyError(object_path)
2121
3446
2122
3447
del _interface
2123
2124
class MandosDBusServiceTransitional(MandosDBusService):
2125
__metaclass__ = AlternateDBusNamesMetaclass
2126
mandos_dbus_service = MandosDBusServiceTransitional()
2127
3448
3449
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3450
out_signature="a{oa{sa{sv}}}")
3451
def GetManagedObjects(self):
3452
"""D-Bus method"""
3453
return dbus.Dictionary(
3454
{client.dbus_object_path:
3455
dbus.Dictionary(
3456
{interface: client.GetAll(interface)
3457
for interface in
3458
client._get_all_interface_names()})
3459
for client in tcp_server.clients.values()})
3460
3461
def client_added_signal(self, client):
3462
"""Send the new standard signal and the old signal"""
3463
if use_dbus:
3464
# New standard signal
3465
self.InterfacesAdded(
3466
client.dbus_object_path,
3467
dbus.Dictionary(
3468
{interface: client.GetAll(interface)
3469
for interface in
3470
client._get_all_interface_names()}))
3471
# Old signal
3472
self.ClientAdded(client.dbus_object_path)
3473
3474
def client_removed_signal(self, client):
3475
"""Send the new standard signal and the old signal"""
3476
if use_dbus:
3477
# New standard signal
3478
self.InterfacesRemoved(
3479
client.dbus_object_path,
3480
client._get_all_interface_names())
3481
# Old signal
3482
self.ClientRemoved(client.dbus_object_path,
3483
client.name)
3484
3485
mandos_dbus_service = MandosDBusService()
3486
3487
# Save modules to variables to exempt the modules from being
3488
# unloaded before the function registered with atexit() is run.
3489
mp = multiprocessing
3490
wn = wnull
3491
2128
3492
def cleanup():
2129
3493
"Cleanup function; run on exit"
2130
service.cleanup()
2131
3494
if zeroconf:
3495
service.cleanup()
3496
3497
mp.active_children()
3498
wn.close()
3499
if not (tcp_server.clients or client_settings):
3500
return
3501
3502
# Store client before exiting. Secrets are encrypted with key
3503
# based on what config file has. If config file is
3504
# removed/edited, old secret will thus be unrecovable.
3505
clients = {}
3506
with PGPEngine() as pgp:
3507
for client in tcp_server.clients.values():
3508
key = client_settings[client.name]["secret"]
3509
client.encrypted_secret = pgp.encrypt(client.secret,
3510
key)
3511
client_dict = {}
3512
3513
# A list of attributes that can not be pickled
3514
# + secret.
3515
exclude = {"bus", "changedstate", "secret",
3516
"checker", "server_settings"}
3517
for name, typ in inspect.getmembers(dbus.service
3518
.Object):
3519
exclude.add(name)
3520
3521
client_dict["encrypted_secret"] = (client
3522
.encrypted_secret)
3523
for attr in client.client_structure:
3524
if attr not in exclude:
3525
client_dict[attr] = getattr(client, attr)
3526
3527
clients[client.name] = client_dict
3528
del client_settings[client.name]["secret"]
3529
3530
try:
3531
with tempfile.NamedTemporaryFile(
3532
mode='wb',
3533
suffix=".pickle",
3534
prefix='clients-',
3535
dir=os.path.dirname(stored_state_path),
3536
delete=False) as stored_state:
3537
pickle.dump((clients, client_settings), stored_state,
3538
protocol=2)
3539
tempname = stored_state.name
3540
os.rename(tempname, stored_state_path)
3541
except (IOError, OSError) as e:
3542
if not debug:
3543
try:
3544
os.remove(tempname)
3545
except NameError:
3546
pass
3547
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
3548
logger.warning("Could not save persistent state: {}"
3549
.format(os.strerror(e.errno)))
3550
else:
3551
logger.warning("Could not save persistent state:",
3552
exc_info=e)
3553
raise
3554
3555
# Delete all clients, and settings from config
2132
3556
while tcp_server.clients:
2133
client = tcp_server.clients.pop()
3557
name, client = tcp_server.clients.popitem()
2134
3558
if use_dbus:
2135
3559
client.remove_from_connection()
2136
client.disable_hook = None
2137
# Don't signal anything except ClientRemoved
3560
# Don't signal the disabling
2138
3561
client.disable(quiet=True)
3562
# Emit D-Bus signal for removal
2139
3563
if use_dbus:
2140
# Emit D-Bus signal
2141
mandos_dbus_service.ClientRemoved(client
2142
.dbus_object_path,
2143
client.name)
2144
3564
mandos_dbus_service.client_removed_signal(client)
3565
client_settings.clear()
3566
2145
3567
atexit.register(cleanup)
2146
2147
for client in tcp_server.clients:
3568
3569
for client in tcp_server.clients.values():
2148
3570
if use_dbus:
2149
# Emit D-Bus signal
2150
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2151
client.enable()
2152
3571
# Emit D-Bus signal for adding
3572
mandos_dbus_service.client_added_signal(client)
3573
# Need to initiate checking of clients
3574
if client.enabled:
3575
client.init_checker()
3576
2153
3577
tcp_server.enable()
2154
3578
tcp_server.server_activate()
2155
3579
2156
3580
# Find out what port we got
2157
service.port = tcp_server.socket.getsockname()[1]
3581
if zeroconf:
3582
service.port = tcp_server.socket.getsockname()[1]
2158
3583
if use_ipv6:
2159
3584
logger.info("Now listening on address %r, port %d,"
2160
" flowinfo %d, scope_id %d"
2161
% tcp_server.socket.getsockname())
3585
" flowinfo %d, scope_id %d",
3586
*tcp_server.socket.getsockname())
2162
3587
else: # IPv4
2163
logger.info("Now listening on address %r, port %d"
2164
% tcp_server.socket.getsockname())
2165
2166
#service.interface = tcp_server.socket.getsockname()[3]
2167
3588
logger.info("Now listening on address %r, port %d",
3589
*tcp_server.socket.getsockname())
3590
3591
# service.interface = tcp_server.socket.getsockname()[3]
3592
2168
3593
try:
2169
# From the Avahi example code
2170
try:
2171
service.activate()
2172
except dbus.exceptions.DBusException as error:
2173
logger.critical("DBusException: %s", error)
2174
cleanup()
2175
sys.exit(1)
2176
# End of Avahi example code
2177
2178
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2179
lambda *args, **kwargs:
2180
(tcp_server.handle_request
2181
(*args[2:], **kwargs) or True))
2182
3594
if zeroconf:
3595
# From the Avahi example code
3596
try:
3597
service.activate()
3598
except dbus.exceptions.DBusException as error:
3599
logger.critical("D-Bus Exception", exc_info=error)
3600
cleanup()
3601
sys.exit(1)
3602
# End of Avahi example code
3603
3604
GLib.io_add_watch(tcp_server.fileno(), GLib.IO_IN,
3605
lambda *args, **kwargs:
3606
(tcp_server.handle_request
3607
(*args[2:], **kwargs) or True))
3608
2183
3609
logger.debug("Starting main loop")
2184
3610
main_loop.run()
2185
3611
except AvahiError as error:
2186
logger.critical("AvahiError: %s", error)
3612
logger.critical("Avahi Error", exc_info=error)
2187
3613
cleanup()
2188
3614
sys.exit(1)
2189
3615
except KeyboardInterrupt:
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0