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- Committer: Teddy Hogeborn
- Date: 2011-09-26 21:06:14 UTC
- mto: This revision was merged to the branch mainline in revision 503.
- Revision ID: teddy@fukt.bsnet.se-20110926210614-tvxkpb6xfhkq3gc3
* mandos: White space fixes only.
- files removed:
- bugs.xml
- debian/upstream
- network-hooks.d
- plugin-helpers
- files modified:
- .bzrignore
added
removed
mandos
1
1
#!/usr/bin/python
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2
# -*- mode: python; coding: utf-8 -*-
3
#
3
#
4
4
# Mandos server - give out binary blobs to connecting clients.
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#
5
#
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# This program is partly derived from an example program for an Avahi
7
7
# service publisher, downloaded from
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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".
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#
12
#
13
13
# Everything else is
14
# Copyright © 2008-2016 Teddy Hogeborn
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# Copyright © 2008-2016 Björn Påhlsson
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#
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# Copyright © 2008-2011 Teddy Hogeborn
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# Copyright © 2008-2011 Björn Påhlsson
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#
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# This program is free software: you can redistribute it and/or modify
18
18
# it under the terms of the GNU General Public License as published by
19
19
# the Free Software Foundation, either version 3 of the License, or
23
23
# but WITHOUT ANY WARRANTY; without even the implied warranty of
24
24
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
25
25
# GNU General Public License for more details.
26
#
26
#
27
27
# You should have received a copy of the GNU General Public License
28
28
# along with this program. If not, see
29
29
# <http://www.gnu.org/licenses/>.
30
#
31
# Contact the authors at <mandos@recompile.se>.
32
#
30
#
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# Contact the authors at <mandos@fukt.bsnet.se>.
32
#
33
33
34
34
from __future__ import (division, absolute_import, print_function,
35
35
unicode_literals)
36
36
37
try:
38
from future_builtins import *
39
except ImportError:
40
pass
41
42
try:
43
import SocketServer as socketserver
44
except ImportError:
45
import socketserver
37
import SocketServer as socketserver
46
38
import socket
47
39
import argparse
48
40
import datetime
49
41
import errno
50
try:
51
import ConfigParser as configparser
52
except ImportError:
53
import configparser
42
import gnutls.crypto
43
import gnutls.connection
44
import gnutls.errors
45
import gnutls.library.functions
46
import gnutls.library.constants
47
import gnutls.library.types
48
import ConfigParser as configparser
54
49
import sys
55
50
import re
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51
import os
65
60
import struct
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61
import fcntl
67
62
import functools
68
try:
69
import cPickle as pickle
70
except ImportError:
71
import pickle
63
import cPickle as pickle
72
64
import multiprocessing
73
import types
74
import binascii
75
import tempfile
76
import itertools
77
import collections
78
import codecs
79
65
80
66
import dbus
81
67
import dbus.service
82
from gi.repository import GLib
68
import gobject
69
import avahi
83
70
from dbus.mainloop.glib import DBusGMainLoop
84
71
import ctypes
85
72
import ctypes.util
86
73
import xml.dom.minidom
87
74
import inspect
88
75
89
# Try to find the value of SO_BINDTODEVICE:
90
76
try:
91
# This is where SO_BINDTODEVICE is in Python 3.3 (or 3.4?) and
92
# newer, and it is also the most natural place for it:
93
77
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
94
78
except AttributeError:
95
79
try:
96
# This is where SO_BINDTODEVICE was up to and including Python
97
# 2.6, and also 3.2:
98
80
from IN import SO_BINDTODEVICE
99
81
except ImportError:
100
# In Python 2.7 it seems to have been removed entirely.
101
# Try running the C preprocessor:
102
try:
103
cc = subprocess.Popen(["cc", "--language=c", "-E",
104
"/dev/stdin"],
105
stdin=subprocess.PIPE,
106
stdout=subprocess.PIPE)
107
stdout = cc.communicate(
108
"#include <sys/socket.h>\nSO_BINDTODEVICE\n")[0]
109
SO_BINDTODEVICE = int(stdout.splitlines()[-1])
110
except (OSError, ValueError, IndexError):
111
# No value found
112
SO_BINDTODEVICE = None
113
114
if sys.version_info.major == 2:
115
str = unicode
116
117
version = "1.7.13"
118
stored_state_file = "clients.pickle"
119
120
logger = logging.getLogger()
121
syslogger = None
122
123
try:
124
if_nametoindex = ctypes.cdll.LoadLibrary(
125
ctypes.util.find_library("c")).if_nametoindex
126
except (OSError, AttributeError):
127
128
def if_nametoindex(interface):
129
"Get an interface index the hard way, i.e. using fcntl()"
130
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
131
with contextlib.closing(socket.socket()) as s:
132
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
133
struct.pack(b"16s16x", interface))
134
interface_index = struct.unpack("I", ifreq[16:20])[0]
135
return interface_index
136
137
138
def copy_function(func):
139
"""Make a copy of a function"""
140
if sys.version_info.major == 2:
141
return types.FunctionType(func.func_code,
142
func.func_globals,
143
func.func_name,
144
func.func_defaults,
145
func.func_closure)
146
else:
147
return types.FunctionType(func.__code__,
148
func.__globals__,
149
func.__name__,
150
func.__defaults__,
151
func.__closure__)
152
153
154
def initlogger(debug, level=logging.WARNING):
155
"""init logger and add loglevel"""
156
157
global syslogger
158
syslogger = (logging.handlers.SysLogHandler(
159
facility=logging.handlers.SysLogHandler.LOG_DAEMON,
160
address="/dev/log"))
161
syslogger.setFormatter(logging.Formatter
162
('Mandos [%(process)d]: %(levelname)s:'
163
' %(message)s'))
164
logger.addHandler(syslogger)
165
166
if debug:
167
console = logging.StreamHandler()
168
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
169
' [%(process)d]:'
170
' %(levelname)s:'
171
' %(message)s'))
172
logger.addHandler(console)
173
logger.setLevel(level)
174
175
176
class PGPError(Exception):
177
"""Exception if encryption/decryption fails"""
178
pass
179
180
181
class PGPEngine(object):
182
"""A simple class for OpenPGP symmetric encryption & decryption"""
183
184
def __init__(self):
185
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
186
self.gpg = "gpg"
187
try:
188
output = subprocess.check_output(["gpgconf"])
189
for line in output.splitlines():
190
name, text, path = line.split(b":")
191
if name == "gpg":
192
self.gpg = path
193
break
194
except OSError as e:
195
if e.errno != errno.ENOENT:
196
raise
197
self.gnupgargs = ['--batch',
198
'--homedir', self.tempdir,
199
'--force-mdc',
200
'--quiet']
201
# Only GPG version 1 has the --no-use-agent option.
202
if self.gpg == "gpg" or self.gpg.endswith("/gpg"):
203
self.gnupgargs.append("--no-use-agent")
204
205
def __enter__(self):
206
return self
207
208
def __exit__(self, exc_type, exc_value, traceback):
209
self._cleanup()
210
return False
211
212
def __del__(self):
213
self._cleanup()
214
215
def _cleanup(self):
216
if self.tempdir is not None:
217
# Delete contents of tempdir
218
for root, dirs, files in os.walk(self.tempdir,
219
topdown=False):
220
for filename in files:
221
os.remove(os.path.join(root, filename))
222
for dirname in dirs:
223
os.rmdir(os.path.join(root, dirname))
224
# Remove tempdir
225
os.rmdir(self.tempdir)
226
self.tempdir = None
227
228
def password_encode(self, password):
229
# Passphrase can not be empty and can not contain newlines or
230
# NUL bytes. So we prefix it and hex encode it.
231
encoded = b"mandos" + binascii.hexlify(password)
232
if len(encoded) > 2048:
233
# GnuPG can't handle long passwords, so encode differently
234
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
235
.replace(b"\n", b"\\n")
236
.replace(b"\0", b"\\x00"))
237
return encoded
238
239
def encrypt(self, data, password):
240
passphrase = self.password_encode(password)
241
with tempfile.NamedTemporaryFile(
242
dir=self.tempdir) as passfile:
243
passfile.write(passphrase)
244
passfile.flush()
245
proc = subprocess.Popen([self.gpg, '--symmetric',
246
'--passphrase-file',
247
passfile.name]
248
+ self.gnupgargs,
249
stdin=subprocess.PIPE,
250
stdout=subprocess.PIPE,
251
stderr=subprocess.PIPE)
252
ciphertext, err = proc.communicate(input=data)
253
if proc.returncode != 0:
254
raise PGPError(err)
255
return ciphertext
256
257
def decrypt(self, data, password):
258
passphrase = self.password_encode(password)
259
with tempfile.NamedTemporaryFile(
260
dir=self.tempdir) as passfile:
261
passfile.write(passphrase)
262
passfile.flush()
263
proc = subprocess.Popen([self.gpg, '--decrypt',
264
'--passphrase-file',
265
passfile.name]
266
+ self.gnupgargs,
267
stdin=subprocess.PIPE,
268
stdout=subprocess.PIPE,
269
stderr=subprocess.PIPE)
270
decrypted_plaintext, err = proc.communicate(input=data)
271
if proc.returncode != 0:
272
raise PGPError(err)
273
return decrypted_plaintext
274
275
276
# Pretend that we have an Avahi module
277
class Avahi(object):
278
"""This isn't so much a class as it is a module-like namespace.
279
It is instantiated once, and simulates having an Avahi module."""
280
IF_UNSPEC = -1 # avahi-common/address.h
281
PROTO_UNSPEC = -1 # avahi-common/address.h
282
PROTO_INET = 0 # avahi-common/address.h
283
PROTO_INET6 = 1 # avahi-common/address.h
284
DBUS_NAME = "org.freedesktop.Avahi"
285
DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"
286
DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"
287
DBUS_PATH_SERVER = "/"
288
289
def string_array_to_txt_array(self, t):
290
return dbus.Array((dbus.ByteArray(s.encode("utf-8"))
291
for s in t), signature="ay")
292
ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h
293
ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h
294
ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h
295
SERVER_INVALID = 0 # avahi-common/defs.h
296
SERVER_REGISTERING = 1 # avahi-common/defs.h
297
SERVER_RUNNING = 2 # avahi-common/defs.h
298
SERVER_COLLISION = 3 # avahi-common/defs.h
299
SERVER_FAILURE = 4 # avahi-common/defs.h
300
avahi = Avahi()
301
82
SO_BINDTODEVICE = None
83
84
85
version = "1.3.1"
86
87
#logger = logging.getLogger('mandos')
88
logger = logging.Logger('mandos')
89
syslogger = (logging.handlers.SysLogHandler
90
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
91
address = str("/dev/log")))
92
syslogger.setFormatter(logging.Formatter
93
('Mandos [%(process)d]: %(levelname)s:'
94
' %(message)s'))
95
logger.addHandler(syslogger)
96
97
console = logging.StreamHandler()
98
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
99
' %(levelname)s:'
100
' %(message)s'))
101
logger.addHandler(console)
302
102
303
103
class AvahiError(Exception):
304
104
def __init__(self, value, *args, **kwargs):
305
105
self.value = value
306
return super(AvahiError, self).__init__(value, *args,
307
**kwargs)
308
106
super(AvahiError, self).__init__(value, *args, **kwargs)
107
def __unicode__(self):
108
return unicode(repr(self.value))
309
109
310
110
class AvahiServiceError(AvahiError):
311
111
pass
312
112
313
314
113
class AvahiGroupError(AvahiError):
315
114
pass
316
115
317
116
318
117
class AvahiService(object):
319
118
"""An Avahi (Zeroconf) service.
320
119
321
120
Attributes:
322
121
interface: integer; avahi.IF_UNSPEC or an interface index.
323
122
Used to optionally bind to the specified interface.
324
123
name: string; Example: 'Mandos'
325
124
type: string; Example: '_mandos._tcp'.
326
See <https://www.iana.org/assignments/service-names-port-numbers>
125
See <http://www.dns-sd.org/ServiceTypes.html>
327
126
port: integer; what port to announce
328
127
TXT: list of strings; TXT record for the service
329
128
domain: string; Domain to publish on, default to .local if empty.
335
134
server: D-Bus Server
336
135
bus: dbus.SystemBus()
337
136
"""
338
339
def __init__(self,
340
interface=avahi.IF_UNSPEC,
341
name=None,
342
servicetype=None,
343
port=None,
344
TXT=None,
345
domain="",
346
host="",
347
max_renames=32768,
348
protocol=avahi.PROTO_UNSPEC,
349
bus=None):
137
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
138
servicetype = None, port = None, TXT = None,
139
domain = "", host = "", max_renames = 32768,
140
protocol = avahi.PROTO_UNSPEC, bus = None):
350
141
self.interface = interface
351
142
self.name = name
352
143
self.type = servicetype
361
152
self.server = None
362
153
self.bus = bus
363
154
self.entry_group_state_changed_match = None
364
365
def rename(self, remove=True):
155
def rename(self):
366
156
"""Derived from the Avahi example code"""
367
157
if self.rename_count >= self.max_renames:
368
158
logger.critical("No suitable Zeroconf service name found"
369
159
" after %i retries, exiting.",
370
160
self.rename_count)
371
161
raise AvahiServiceError("Too many renames")
372
self.name = str(
373
self.server.GetAlternativeServiceName(self.name))
374
self.rename_count += 1
162
self.name = unicode(self.server.GetAlternativeServiceName(self.name))
375
163
logger.info("Changing Zeroconf service name to %r ...",
376
164
self.name)
377
if remove:
378
self.remove()
165
syslogger.setFormatter(logging.Formatter
166
('Mandos (%s) [%%(process)d]:'
167
' %%(levelname)s: %%(message)s'
168
% self.name))
169
self.remove()
379
170
try:
380
171
self.add()
381
172
except dbus.exceptions.DBusException as error:
382
if (error.get_dbus_name()
383
== "org.freedesktop.Avahi.CollisionError"):
384
logger.info("Local Zeroconf service name collision.")
385
return self.rename(remove=False)
386
else:
387
logger.critical("D-Bus Exception", exc_info=error)
388
self.cleanup()
389
os._exit(1)
390
173
logger.critical("DBusException: %s", error)
174
self.cleanup()
175
os._exit(1)
176
self.rename_count += 1
391
177
def remove(self):
392
178
"""Derived from the Avahi example code"""
393
179
if self.entry_group_state_changed_match is not None:
395
181
self.entry_group_state_changed_match = None
396
182
if self.group is not None:
397
183
self.group.Reset()
398
399
184
def add(self):
400
185
"""Derived from the Avahi example code"""
401
186
self.remove()
406
191
avahi.DBUS_INTERFACE_ENTRY_GROUP)
407
192
self.entry_group_state_changed_match = (
408
193
self.group.connect_to_signal(
409
'StateChanged', self.entry_group_state_changed))
194
'StateChanged', self .entry_group_state_changed))
410
195
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
411
196
self.name, self.type)
412
197
self.group.AddService(
418
203
dbus.UInt16(self.port),
419
204
avahi.string_array_to_txt_array(self.TXT))
420
205
self.group.Commit()
421
422
206
def entry_group_state_changed(self, state, error):
423
207
"""Derived from the Avahi example code"""
424
208
logger.debug("Avahi entry group state change: %i", state)
425
209
426
210
if state == avahi.ENTRY_GROUP_ESTABLISHED:
427
211
logger.debug("Zeroconf service established.")
428
212
elif state == avahi.ENTRY_GROUP_COLLISION:
430
214
self.rename()
431
215
elif state == avahi.ENTRY_GROUP_FAILURE:
432
216
logger.critical("Avahi: Error in group state changed %s",
433
str(error))
434
raise AvahiGroupError("State changed: {!s}".format(error))
435
217
unicode(error))
218
raise AvahiGroupError("State changed: %s"
219
% unicode(error))
436
220
def cleanup(self):
437
221
"""Derived from the Avahi example code"""
438
222
if self.group is not None:
439
223
try:
440
224
self.group.Free()
441
225
except (dbus.exceptions.UnknownMethodException,
442
dbus.exceptions.DBusException):
226
dbus.exceptions.DBusException) as e:
443
227
pass
444
228
self.group = None
445
229
self.remove()
446
447
230
def server_state_changed(self, state, error=None):
448
231
"""Derived from the Avahi example code"""
449
232
logger.debug("Avahi server state change: %i", state)
450
bad_states = {
451
avahi.SERVER_INVALID: "Zeroconf server invalid",
452
avahi.SERVER_REGISTERING: None,
453
avahi.SERVER_COLLISION: "Zeroconf server name collision",
454
avahi.SERVER_FAILURE: "Zeroconf server failure",
455
}
233
bad_states = { avahi.SERVER_INVALID:
234
"Zeroconf server invalid",
235
avahi.SERVER_REGISTERING: None,
236
avahi.SERVER_COLLISION:
237
"Zeroconf server name collision",
238
avahi.SERVER_FAILURE:
239
"Zeroconf server failure" }
456
240
if state in bad_states:
457
241
if bad_states[state] is not None:
458
242
if error is None:
461
245
logger.error(bad_states[state] + ": %r", error)
462
246
self.cleanup()
463
247
elif state == avahi.SERVER_RUNNING:
464
try:
465
self.add()
466
except dbus.exceptions.DBusException as error:
467
if (error.get_dbus_name()
468
== "org.freedesktop.Avahi.CollisionError"):
469
logger.info("Local Zeroconf service name"
470
" collision.")
471
return self.rename(remove=False)
472
else:
473
logger.critical("D-Bus Exception", exc_info=error)
474
self.cleanup()
475
os._exit(1)
248
self.add()
476
249
else:
477
250
if error is None:
478
251
logger.debug("Unknown state: %r", state)
479
252
else:
480
253
logger.debug("Unknown state: %r: %r", state, error)
481
482
254
def activate(self):
483
255
"""Derived from the Avahi example code"""
484
256
if self.server is None:
488
260
follow_name_owner_changes=True),
489
261
avahi.DBUS_INTERFACE_SERVER)
490
262
self.server.connect_to_signal("StateChanged",
491
self.server_state_changed)
263
self.server_state_changed)
492
264
self.server_state_changed(self.server.GetState())
493
265
494
266
495
class AvahiServiceToSyslog(AvahiService):
496
def rename(self, *args, **kwargs):
497
"""Add the new name to the syslog messages"""
498
ret = AvahiService.rename(self, *args, **kwargs)
499
syslogger.setFormatter(logging.Formatter(
500
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
501
.format(self.name)))
502
return ret
503
504
505
# Pretend that we have a GnuTLS module
506
class GnuTLS(object):
507
"""This isn't so much a class as it is a module-like namespace.
508
It is instantiated once, and simulates having a GnuTLS module."""
509
510
library = ctypes.util.find_library("gnutls")
511
if library is None:
512
library = ctypes.util.find_library("gnutls-deb0")
513
_library = ctypes.cdll.LoadLibrary(library)
514
del library
515
_need_version = b"3.3.0"
516
517
def __init__(self):
518
# Need to use class name "GnuTLS" here, since this method is
519
# called before the assignment to the "gnutls" global variable
520
# happens.
521
if GnuTLS.check_version(self._need_version) is None:
522
raise GnuTLS.Error("Needs GnuTLS {} or later"
523
.format(self._need_version))
524
525
# Unless otherwise indicated, the constants and types below are
526
# all from the gnutls/gnutls.h C header file.
527
528
# Constants
529
E_SUCCESS = 0
530
E_INTERRUPTED = -52
531
E_AGAIN = -28
532
CRT_OPENPGP = 2
533
CLIENT = 2
534
SHUT_RDWR = 0
535
CRD_CERTIFICATE = 1
536
E_NO_CERTIFICATE_FOUND = -49
537
OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
538
539
# Types
540
class session_int(ctypes.Structure):
541
_fields_ = []
542
session_t = ctypes.POINTER(session_int)
543
544
class certificate_credentials_st(ctypes.Structure):
545
_fields_ = []
546
certificate_credentials_t = ctypes.POINTER(
547
certificate_credentials_st)
548
certificate_type_t = ctypes.c_int
549
550
class datum_t(ctypes.Structure):
551
_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
552
('size', ctypes.c_uint)]
553
554
class openpgp_crt_int(ctypes.Structure):
555
_fields_ = []
556
openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
557
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
558
log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
559
credentials_type_t = ctypes.c_int
560
transport_ptr_t = ctypes.c_void_p
561
close_request_t = ctypes.c_int
562
563
# Exceptions
564
class Error(Exception):
565
# We need to use the class name "GnuTLS" here, since this
566
# exception might be raised from within GnuTLS.__init__,
567
# which is called before the assignment to the "gnutls"
568
# global variable has happened.
569
def __init__(self, message=None, code=None, args=()):
570
# Default usage is by a message string, but if a return
571
# code is passed, convert it to a string with
572
# gnutls.strerror()
573
self.code = code
574
if message is None and code is not None:
575
message = GnuTLS.strerror(code)
576
return super(GnuTLS.Error, self).__init__(
577
message, *args)
578
579
class CertificateSecurityError(Error):
580
pass
581
582
# Classes
583
class Credentials(object):
584
def __init__(self):
585
self._c_object = gnutls.certificate_credentials_t()
586
gnutls.certificate_allocate_credentials(
587
ctypes.byref(self._c_object))
588
self.type = gnutls.CRD_CERTIFICATE
589
590
def __del__(self):
591
gnutls.certificate_free_credentials(self._c_object)
592
593
class ClientSession(object):
594
def __init__(self, socket, credentials=None):
595
self._c_object = gnutls.session_t()
596
gnutls.init(ctypes.byref(self._c_object), gnutls.CLIENT)
597
gnutls.set_default_priority(self._c_object)
598
gnutls.transport_set_ptr(self._c_object, socket.fileno())
599
gnutls.handshake_set_private_extensions(self._c_object,
600
True)
601
self.socket = socket
602
if credentials is None:
603
credentials = gnutls.Credentials()
604
gnutls.credentials_set(self._c_object, credentials.type,
605
ctypes.cast(credentials._c_object,
606
ctypes.c_void_p))
607
self.credentials = credentials
608
609
def __del__(self):
610
gnutls.deinit(self._c_object)
611
612
def handshake(self):
613
return gnutls.handshake(self._c_object)
614
615
def send(self, data):
616
data = bytes(data)
617
data_len = len(data)
618
while data_len > 0:
619
data_len -= gnutls.record_send(self._c_object,
620
data[-data_len:],
621
data_len)
622
623
def bye(self):
624
return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
625
626
# Error handling functions
627
def _error_code(result):
628
"""A function to raise exceptions on errors, suitable
629
for the 'restype' attribute on ctypes functions"""
630
if result >= 0:
631
return result
632
if result == gnutls.E_NO_CERTIFICATE_FOUND:
633
raise gnutls.CertificateSecurityError(code=result)
634
raise gnutls.Error(code=result)
635
636
def _retry_on_error(result, func, arguments):
637
"""A function to retry on some errors, suitable
638
for the 'errcheck' attribute on ctypes functions"""
639
while result < 0:
640
if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
641
return _error_code(result)
642
result = func(*arguments)
643
return result
644
645
# Unless otherwise indicated, the function declarations below are
646
# all from the gnutls/gnutls.h C header file.
647
648
# Functions
649
priority_set_direct = _library.gnutls_priority_set_direct
650
priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
651
ctypes.POINTER(ctypes.c_char_p)]
652
priority_set_direct.restype = _error_code
653
654
init = _library.gnutls_init
655
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
656
init.restype = _error_code
657
658
set_default_priority = _library.gnutls_set_default_priority
659
set_default_priority.argtypes = [session_t]
660
set_default_priority.restype = _error_code
661
662
record_send = _library.gnutls_record_send
663
record_send.argtypes = [session_t, ctypes.c_void_p,
664
ctypes.c_size_t]
665
record_send.restype = ctypes.c_ssize_t
666
record_send.errcheck = _retry_on_error
667
668
certificate_allocate_credentials = (
669
_library.gnutls_certificate_allocate_credentials)
670
certificate_allocate_credentials.argtypes = [
671
ctypes.POINTER(certificate_credentials_t)]
672
certificate_allocate_credentials.restype = _error_code
673
674
certificate_free_credentials = (
675
_library.gnutls_certificate_free_credentials)
676
certificate_free_credentials.argtypes = [
677
certificate_credentials_t]
678
certificate_free_credentials.restype = None
679
680
handshake_set_private_extensions = (
681
_library.gnutls_handshake_set_private_extensions)
682
handshake_set_private_extensions.argtypes = [session_t,
683
ctypes.c_int]
684
handshake_set_private_extensions.restype = None
685
686
credentials_set = _library.gnutls_credentials_set
687
credentials_set.argtypes = [session_t, credentials_type_t,
688
ctypes.c_void_p]
689
credentials_set.restype = _error_code
690
691
strerror = _library.gnutls_strerror
692
strerror.argtypes = [ctypes.c_int]
693
strerror.restype = ctypes.c_char_p
694
695
certificate_type_get = _library.gnutls_certificate_type_get
696
certificate_type_get.argtypes = [session_t]
697
certificate_type_get.restype = _error_code
698
699
certificate_get_peers = _library.gnutls_certificate_get_peers
700
certificate_get_peers.argtypes = [session_t,
701
ctypes.POINTER(ctypes.c_uint)]
702
certificate_get_peers.restype = ctypes.POINTER(datum_t)
703
704
global_set_log_level = _library.gnutls_global_set_log_level
705
global_set_log_level.argtypes = [ctypes.c_int]
706
global_set_log_level.restype = None
707
708
global_set_log_function = _library.gnutls_global_set_log_function
709
global_set_log_function.argtypes = [log_func]
710
global_set_log_function.restype = None
711
712
deinit = _library.gnutls_deinit
713
deinit.argtypes = [session_t]
714
deinit.restype = None
715
716
handshake = _library.gnutls_handshake
717
handshake.argtypes = [session_t]
718
handshake.restype = _error_code
719
handshake.errcheck = _retry_on_error
720
721
transport_set_ptr = _library.gnutls_transport_set_ptr
722
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
723
transport_set_ptr.restype = None
724
725
bye = _library.gnutls_bye
726
bye.argtypes = [session_t, close_request_t]
727
bye.restype = _error_code
728
bye.errcheck = _retry_on_error
729
730
check_version = _library.gnutls_check_version
731
check_version.argtypes = [ctypes.c_char_p]
732
check_version.restype = ctypes.c_char_p
733
734
# All the function declarations below are from gnutls/openpgp.h
735
736
openpgp_crt_init = _library.gnutls_openpgp_crt_init
737
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
738
openpgp_crt_init.restype = _error_code
739
740
openpgp_crt_import = _library.gnutls_openpgp_crt_import
741
openpgp_crt_import.argtypes = [openpgp_crt_t,
742
ctypes.POINTER(datum_t),
743
openpgp_crt_fmt_t]
744
openpgp_crt_import.restype = _error_code
745
746
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
747
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
748
ctypes.POINTER(ctypes.c_uint)]
749
openpgp_crt_verify_self.restype = _error_code
750
751
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
752
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
753
openpgp_crt_deinit.restype = None
754
755
openpgp_crt_get_fingerprint = (
756
_library.gnutls_openpgp_crt_get_fingerprint)
757
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
758
ctypes.c_void_p,
759
ctypes.POINTER(
760
ctypes.c_size_t)]
761
openpgp_crt_get_fingerprint.restype = _error_code
762
763
# Remove non-public functions
764
del _error_code, _retry_on_error
765
# Create the global "gnutls" object, simulating a module
766
gnutls = GnuTLS()
767
768
769
def call_pipe(connection, # : multiprocessing.Connection
770
func, *args, **kwargs):
771
"""This function is meant to be called by multiprocessing.Process
772
773
This function runs func(*args, **kwargs), and writes the resulting
774
return value on the provided multiprocessing.Connection.
775
"""
776
connection.send(func(*args, **kwargs))
777
connection.close()
778
779
267
def _timedelta_to_milliseconds(td):
268
"Convert a datetime.timedelta() to milliseconds"
269
return ((td.days * 24 * 60 * 60 * 1000)
270
+ (td.seconds * 1000)
271
+ (td.microseconds // 1000))
272
780
273
class Client(object):
781
274
"""A representation of a client host served by this server.
782
275
783
276
Attributes:
784
approved: bool(); 'None' if not yet approved/disapproved
277
_approved: bool(); 'None' if not yet approved/disapproved
785
278
approval_delay: datetime.timedelta(); Time to wait for approval
786
279
approval_duration: datetime.timedelta(); Duration of one approval
787
280
checker: subprocess.Popen(); a running checker process used
788
281
to see if the client lives.
789
282
'None' if no process is running.
790
checker_callback_tag: a GLib event source tag, or None
283
checker_callback_tag: a gobject event source tag, or None
791
284
checker_command: string; External command which is run to check
792
285
if client lives. %() expansions are done at
793
286
runtime with vars(self) as dict, so that for
794
287
instance %(name)s can be used in the command.
795
checker_initiator_tag: a GLib event source tag, or None
288
checker_initiator_tag: a gobject event source tag, or None
796
289
created: datetime.datetime(); (UTC) object creation
797
client_structure: Object describing what attributes a client has
798
and is used for storing the client at exit
799
290
current_checker_command: string; current running checker_command
800
disable_initiator_tag: a GLib event source tag, or None
291
disable_hook: If set, called by disable() as disable_hook(self)
292
disable_initiator_tag: a gobject event source tag, or None
801
293
enabled: bool()
802
294
fingerprint: string (40 or 32 hexadecimal digits); used to
803
295
uniquely identify the client
805
297
interval: datetime.timedelta(); How often to start a new checker
806
298
last_approval_request: datetime.datetime(); (UTC) or None
807
299
last_checked_ok: datetime.datetime(); (UTC) or None
808
last_checker_status: integer between 0 and 255 reflecting exit
809
status of last checker. -1 reflects crashed
810
checker, -2 means no checker completed yet.
811
last_checker_signal: The signal which killed the last checker, if
812
last_checker_status is -1
813
last_enabled: datetime.datetime(); (UTC) or None
300
last_enabled: datetime.datetime(); (UTC)
814
301
name: string; from the config file, used in log messages and
815
302
D-Bus identifiers
816
303
secret: bytestring; sent verbatim (over TLS) to client
817
304
timeout: datetime.timedelta(); How long from last_checked_ok
818
305
until this client is disabled
819
extended_timeout: extra long timeout when secret has been sent
306
extended_timeout: extra long timeout when password has been sent
820
307
runtime_expansions: Allowed attributes for runtime expansion.
821
308
expires: datetime.datetime(); time (UTC) when a client will be
822
309
disabled, or None
823
server_settings: The server_settings dict from main()
824
310
"""
825
311
826
312
runtime_expansions = ("approval_delay", "approval_duration",
827
"created", "enabled", "expires",
828
"fingerprint", "host", "interval",
829
"last_approval_request", "last_checked_ok",
313
"created", "enabled", "fingerprint",
314
"host", "interval", "last_checked_ok",
830
315
"last_enabled", "name", "timeout")
831
client_defaults = {
832
"timeout": "PT5M",
833
"extended_timeout": "PT15M",
834
"interval": "PT2M",
835
"checker": "fping -q -- %%(host)s",
836
"host": "",
837
"approval_delay": "PT0S",
838
"approval_duration": "PT1S",
839
"approved_by_default": "True",
840
"enabled": "True",
841
}
842
843
@staticmethod
844
def config_parser(config):
845
"""Construct a new dict of client settings of this form:
846
{ client_name: {setting_name: value, ...}, ...}
847
with exceptions for any special settings as defined above.
848
NOTE: Must be a pure function. Must return the same result
849
value given the same arguments.
850
"""
851
settings = {}
852
for client_name in config.sections():
853
section = dict(config.items(client_name))
854
client = settings[client_name] = {}
855
856
client["host"] = section["host"]
857
# Reformat values from string types to Python types
858
client["approved_by_default"] = config.getboolean(
859
client_name, "approved_by_default")
860
client["enabled"] = config.getboolean(client_name,
861
"enabled")
862
863
# Uppercase and remove spaces from fingerprint for later
864
# comparison purposes with return value from the
865
# fingerprint() function
866
client["fingerprint"] = (section["fingerprint"].upper()
867
.replace(" ", ""))
868
if "secret" in section:
869
client["secret"] = codecs.decode(section["secret"]
870
.encode("utf-8"),
871
"base64")
872
elif "secfile" in section:
873
with open(os.path.expanduser(os.path.expandvars
874
(section["secfile"])),
875
"rb") as secfile:
876
client["secret"] = secfile.read()
877
else:
878
raise TypeError("No secret or secfile for section {}"
879
.format(section))
880
client["timeout"] = string_to_delta(section["timeout"])
881
client["extended_timeout"] = string_to_delta(
882
section["extended_timeout"])
883
client["interval"] = string_to_delta(section["interval"])
884
client["approval_delay"] = string_to_delta(
885
section["approval_delay"])
886
client["approval_duration"] = string_to_delta(
887
section["approval_duration"])
888
client["checker_command"] = section["checker"]
889
client["last_approval_request"] = None
890
client["last_checked_ok"] = None
891
client["last_checker_status"] = -2
892
893
return settings
894
895
def __init__(self, settings, name=None, server_settings=None):
316
317
def timeout_milliseconds(self):
318
"Return the 'timeout' attribute in milliseconds"
319
return _timedelta_to_milliseconds(self.timeout)
320
321
def extended_timeout_milliseconds(self):
322
"Return the 'extended_timeout' attribute in milliseconds"
323
return _timedelta_to_milliseconds(self.extended_timeout)
324
325
def interval_milliseconds(self):
326
"Return the 'interval' attribute in milliseconds"
327
return _timedelta_to_milliseconds(self.interval)
328
329
def approval_delay_milliseconds(self):
330
return _timedelta_to_milliseconds(self.approval_delay)
331
332
def __init__(self, name = None, disable_hook=None, config=None):
333
"""Note: the 'checker' key in 'config' sets the
334
'checker_command' attribute and *not* the 'checker'
335
attribute."""
896
336
self.name = name
897
if server_settings is None:
898
server_settings = {}
899
self.server_settings = server_settings
900
# adding all client settings
901
for setting, value in settings.items():
902
setattr(self, setting, value)
903
904
if self.enabled:
905
if not hasattr(self, "last_enabled"):
906
self.last_enabled = datetime.datetime.utcnow()
907
if not hasattr(self, "expires"):
908
self.expires = (datetime.datetime.utcnow()
909
+ self.timeout)
910
else:
911
self.last_enabled = None
912
self.expires = None
913
337
if config is None:
338
config = {}
914
339
logger.debug("Creating client %r", self.name)
340
# Uppercase and remove spaces from fingerprint for later
341
# comparison purposes with return value from the fingerprint()
342
# function
343
self.fingerprint = (config["fingerprint"].upper()
344
.replace(" ", ""))
915
345
logger.debug(" Fingerprint: %s", self.fingerprint)
916
self.created = settings.get("created",
917
datetime.datetime.utcnow())
918
919
# attributes specific for this server instance
346
if "secret" in config:
347
self.secret = config["secret"].decode("base64")
348
elif "secfile" in config:
349
with open(os.path.expanduser(os.path.expandvars
350
(config["secfile"])),
351
"rb") as secfile:
352
self.secret = secfile.read()
353
else:
354
raise TypeError("No secret or secfile for client %s"
355
% self.name)
356
self.host = config.get("host", "")
357
self.created = datetime.datetime.utcnow()
358
self.enabled = False
359
self.last_approval_request = None
360
self.last_enabled = None
361
self.last_checked_ok = None
362
self.timeout = string_to_delta(config["timeout"])
363
self.extended_timeout = string_to_delta(config["extended_timeout"])
364
self.interval = string_to_delta(config["interval"])
365
self.disable_hook = disable_hook
920
366
self.checker = None
921
367
self.checker_initiator_tag = None
922
368
self.disable_initiator_tag = None
369
self.expires = None
923
370
self.checker_callback_tag = None
371
self.checker_command = config["checker"]
924
372
self.current_checker_command = None
925
self.approved = None
373
self.last_connect = None
374
self._approved = None
375
self.approved_by_default = config.get("approved_by_default",
376
True)
926
377
self.approvals_pending = 0
927
self.changedstate = multiprocessing_manager.Condition(
928
multiprocessing_manager.Lock())
929
self.client_structure = [attr
930
for attr in self.__dict__.keys()
931
if not attr.startswith("_")]
932
self.client_structure.append("client_structure")
933
934
for name, t in inspect.getmembers(
935
type(self), lambda obj: isinstance(obj, property)):
936
if not name.startswith("_"):
937
self.client_structure.append(name)
938
939
# Send notice to process children that client state has changed
378
self.approval_delay = string_to_delta(
379
config["approval_delay"])
380
self.approval_duration = string_to_delta(
381
config["approval_duration"])
382
self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())
383
940
384
def send_changedstate(self):
941
with self.changedstate:
942
self.changedstate.notify_all()
943
385
self.changedstate.acquire()
386
self.changedstate.notify_all()
387
self.changedstate.release()
388
944
389
def enable(self):
945
390
"""Start this client's checker and timeout hooks"""
946
391
if getattr(self, "enabled", False):
947
392
# Already enabled
948
393
return
394
self.send_changedstate()
395
# Schedule a new checker to be started an 'interval' from now,
396
# and every interval from then on.
397
self.checker_initiator_tag = (gobject.timeout_add
398
(self.interval_milliseconds(),
399
self.start_checker))
400
# Schedule a disable() when 'timeout' has passed
949
401
self.expires = datetime.datetime.utcnow() + self.timeout
402
self.disable_initiator_tag = (gobject.timeout_add
403
(self.timeout_milliseconds(),
404
self.disable))
950
405
self.enabled = True
951
406
self.last_enabled = datetime.datetime.utcnow()
952
self.init_checker()
953
self.send_changedstate()
954
407
# Also start a new checker *right now*.
408
self.start_checker()
409
955
410
def disable(self, quiet=True):
956
411
"""Disable this client."""
957
412
if not getattr(self, "enabled", False):
958
413
return False
959
414
if not quiet:
415
self.send_changedstate()
416
if not quiet:
960
417
logger.info("Disabling client %s", self.name)
961
if getattr(self, "disable_initiator_tag", None) is not None:
962
GLib.source_remove(self.disable_initiator_tag)
418
if getattr(self, "disable_initiator_tag", False):
419
gobject.source_remove(self.disable_initiator_tag)
963
420
self.disable_initiator_tag = None
964
421
self.expires = None
965
if getattr(self, "checker_initiator_tag", None) is not None:
966
GLib.source_remove(self.checker_initiator_tag)
422
if getattr(self, "checker_initiator_tag", False):
423
gobject.source_remove(self.checker_initiator_tag)
967
424
self.checker_initiator_tag = None
968
425
self.stop_checker()
426
if self.disable_hook:
427
self.disable_hook(self)
969
428
self.enabled = False
970
if not quiet:
971
self.send_changedstate()
972
# Do not run this again if called by a GLib.timeout_add
429
# Do not run this again if called by a gobject.timeout_add
973
430
return False
974
431
975
432
def __del__(self):
433
self.disable_hook = None
976
434
self.disable()
977
978
def init_checker(self):
979
# Schedule a new checker to be started an 'interval' from now,
980
# and every interval from then on.
981
if self.checker_initiator_tag is not None:
982
GLib.source_remove(self.checker_initiator_tag)
983
self.checker_initiator_tag = GLib.timeout_add(
984
int(self.interval.total_seconds() * 1000),
985
self.start_checker)
986
# Schedule a disable() when 'timeout' has passed
987
if self.disable_initiator_tag is not None:
988
GLib.source_remove(self.disable_initiator_tag)
989
self.disable_initiator_tag = GLib.timeout_add(
990
int(self.timeout.total_seconds() * 1000), self.disable)
991
# Also start a new checker *right now*.
992
self.start_checker()
993
994
def checker_callback(self, source, condition, connection,
995
command):
435
436
def checker_callback(self, pid, condition, command):
996
437
"""The checker has completed, so take appropriate actions."""
997
438
self.checker_callback_tag = None
998
439
self.checker = None
999
# Read return code from connection (see call_pipe)
1000
returncode = connection.recv()
1001
connection.close()
1002
1003
if returncode >= 0:
1004
self.last_checker_status = returncode
1005
self.last_checker_signal = None
1006
if self.last_checker_status == 0:
440
if os.WIFEXITED(condition):
441
exitstatus = os.WEXITSTATUS(condition)
442
if exitstatus == 0:
1007
443
logger.info("Checker for %(name)s succeeded",
1008
444
vars(self))
1009
445
self.checked_ok()
1010
446
else:
1011
logger.info("Checker for %(name)s failed", vars(self))
447
logger.info("Checker for %(name)s failed",
448
vars(self))
1012
449
else:
1013
self.last_checker_status = -1
1014
self.last_checker_signal = -returncode
1015
450
logger.warning("Checker for %(name)s crashed?",
1016
451
vars(self))
1017
return False
1018
1019
def checked_ok(self):
1020
"""Assert that the client has been seen, alive and well."""
1021
self.last_checked_ok = datetime.datetime.utcnow()
1022
self.last_checker_status = 0
1023
self.last_checker_signal = None
1024
self.bump_timeout()
1025
1026
def bump_timeout(self, timeout=None):
1027
"""Bump up the timeout for this client."""
452
453
def checked_ok(self, timeout=None):
454
"""Bump up the timeout for this client.
455
456
This should only be called when the client has been seen,
457
alive and well.
458
"""
1028
459
if timeout is None:
1029
460
timeout = self.timeout
1030
if self.disable_initiator_tag is not None:
1031
GLib.source_remove(self.disable_initiator_tag)
1032
self.disable_initiator_tag = None
1033
if getattr(self, "enabled", False):
1034
self.disable_initiator_tag = GLib.timeout_add(
1035
int(timeout.total_seconds() * 1000), self.disable)
1036
self.expires = datetime.datetime.utcnow() + timeout
1037
461
self.last_checked_ok = datetime.datetime.utcnow()
462
gobject.source_remove(self.disable_initiator_tag)
463
self.expires = datetime.datetime.utcnow() + timeout
464
self.disable_initiator_tag = (gobject.timeout_add
465
(_timedelta_to_milliseconds(timeout),
466
self.disable))
467
1038
468
def need_approval(self):
1039
469
self.last_approval_request = datetime.datetime.utcnow()
1040
470
1041
471
def start_checker(self):
1042
472
"""Start a new checker subprocess if one is not running.
1043
473
1044
474
If a checker already exists, leave it running and do
1045
475
nothing."""
1046
476
# The reason for not killing a running checker is that if we
1047
# did that, and if a checker (for some reason) started running
1048
# slowly and taking more than 'interval' time, then the client
1049
# would inevitably timeout, since no checker would get a
1050
# chance to run to completion. If we instead leave running
477
# did that, then if a checker (for some reason) started
478
# running slowly and taking more than 'interval' time, the
479
# client would inevitably timeout, since no checker would get
480
# a chance to run to completion. If we instead leave running
1051
481
# checkers alone, the checker would have to take more time
1052
482
# than 'timeout' for the client to be disabled, which is as it
1053
483
# should be.
1054
1055
if self.checker is not None and not self.checker.is_alive():
1056
logger.warning("Checker was not alive; joining")
1057
self.checker.join()
1058
self.checker = None
484
485
# If a checker exists, make sure it is not a zombie
486
try:
487
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
488
except (AttributeError, OSError) as error:
489
if (isinstance(error, OSError)
490
and error.errno != errno.ECHILD):
491
raise error
492
else:
493
if pid:
494
logger.warning("Checker was a zombie")
495
gobject.source_remove(self.checker_callback_tag)
496
self.checker_callback(pid, status,
497
self.current_checker_command)
1059
498
# Start a new checker if needed
1060
499
if self.checker is None:
1061
# Escape attributes for the shell
1062
escaped_attrs = {
1063
attr: re.escape(str(getattr(self, attr)))
1064
for attr in self.runtime_expansions}
1065
500
try:
1066
command = self.checker_command % escaped_attrs
1067
except TypeError as error:
1068
logger.error('Could not format string "%s"',
1069
self.checker_command,
1070
exc_info=error)
1071
return True # Try again later
501
# In case checker_command has exactly one % operator
502
command = self.checker_command % self.host
503
except TypeError:
504
# Escape attributes for the shell
505
escaped_attrs = dict(
506
(attr,
507
re.escape(unicode(str(getattr(self, attr, "")),
508
errors=
509
'replace')))
510
for attr in
511
self.runtime_expansions)
512
513
try:
514
command = self.checker_command % escaped_attrs
515
except TypeError as error:
516
logger.error('Could not format string "%s":'
517
' %s', self.checker_command, error)
518
return True # Try again later
1072
519
self.current_checker_command = command
1073
logger.info("Starting checker %r for %s", command,
1074
self.name)
1075
# We don't need to redirect stdout and stderr, since
1076
# in normal mode, that is already done by daemon(),
1077
# and in debug mode we don't want to. (Stdin is
1078
# always replaced by /dev/null.)
1079
# The exception is when not debugging but nevertheless
1080
# running in the foreground; use the previously
1081
# created wnull.
1082
popen_args = {"close_fds": True,
1083
"shell": True,
1084
"cwd": "/"}
1085
if (not self.server_settings["debug"]
1086
and self.server_settings["foreground"]):
1087
popen_args.update({"stdout": wnull,
1088
"stderr": wnull})
1089
pipe = multiprocessing.Pipe(duplex=False)
1090
self.checker = multiprocessing.Process(
1091
target=call_pipe,
1092
args=(pipe[1], subprocess.call, command),
1093
kwargs=popen_args)
1094
self.checker.start()
1095
self.checker_callback_tag = GLib.io_add_watch(
1096
pipe[0].fileno(), GLib.IO_IN,
1097
self.checker_callback, pipe[0], command)
1098
# Re-run this periodically if run by GLib.timeout_add
520
try:
521
logger.info("Starting checker %r for %s",
522
command, self.name)
523
# We don't need to redirect stdout and stderr, since
524
# in normal mode, that is already done by daemon(),
525
# and in debug mode we don't want to. (Stdin is
526
# always replaced by /dev/null.)
527
self.checker = subprocess.Popen(command,
528
close_fds=True,
529
shell=True, cwd="/")
530
self.checker_callback_tag = (gobject.child_watch_add
531
(self.checker.pid,
532
self.checker_callback,
533
data=command))
534
# The checker may have completed before the gobject
535
# watch was added. Check for this.
536
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
537
if pid:
538
gobject.source_remove(self.checker_callback_tag)
539
self.checker_callback(pid, status, command)
540
except OSError as error:
541
logger.error("Failed to start subprocess: %s",
542
error)
543
# Re-run this periodically if run by gobject.timeout_add
1099
544
return True
1100
545
1101
546
def stop_checker(self):
1102
547
"""Force the checker process, if any, to stop."""
1103
548
if self.checker_callback_tag:
1104
GLib.source_remove(self.checker_callback_tag)
549
gobject.source_remove(self.checker_callback_tag)
1105
550
self.checker_callback_tag = None
1106
551
if getattr(self, "checker", None) is None:
1107
552
return
1108
553
logger.debug("Stopping checker for %(name)s", vars(self))
1109
self.checker.terminate()
554
try:
555
os.kill(self.checker.pid, signal.SIGTERM)
556
#time.sleep(0.5)
557
#if self.checker.poll() is None:
558
# os.kill(self.checker.pid, signal.SIGKILL)
559
except OSError as error:
560
if error.errno != errno.ESRCH: # No such process
561
raise
1110
562
self.checker = None
1111
563
1112
564
1113
def dbus_service_property(dbus_interface,
1114
signature="v",
1115
access="readwrite",
1116
byte_arrays=False):
565
def dbus_service_property(dbus_interface, signature="v",
566
access="readwrite", byte_arrays=False):
1117
567
"""Decorators for marking methods of a DBusObjectWithProperties to
1118
568
become properties on the D-Bus.
1119
569
1120
570
The decorated method will be called with no arguments by "Get"
1121
571
and with one argument by "Set".
1122
572
1123
573
The parameters, where they are supported, are the same as
1124
574
dbus.service.method, except there is only "signature", since the
1125
575
type from Get() and the type sent to Set() is the same.
1128
578
# "Set" method, so we fail early here:
1129
579
if byte_arrays and signature != "ay":
1130
580
raise ValueError("Byte arrays not supported for non-'ay'"
1131
" signature {!r}".format(signature))
1132
581
" signature %r" % signature)
1133
582
def decorator(func):
1134
583
func._dbus_is_property = True
1135
584
func._dbus_interface = dbus_interface
1138
587
func._dbus_name = func.__name__
1139
588
if func._dbus_name.endswith("_dbus_property"):
1140
589
func._dbus_name = func._dbus_name[:-14]
1141
func._dbus_get_args_options = {'byte_arrays': byte_arrays}
1142
return func
1143
1144
return decorator
1145
1146
1147
def dbus_interface_annotations(dbus_interface):
1148
"""Decorator for marking functions returning interface annotations
1149
1150
Usage:
1151
1152
@dbus_interface_annotations("org.example.Interface")
1153
def _foo(self): # Function name does not matter
1154
return {"org.freedesktop.DBus.Deprecated": "true",
1155
"org.freedesktop.DBus.Property.EmitsChangedSignal":
1156
"false"}
1157
"""
1158
1159
def decorator(func):
1160
func._dbus_is_interface = True
1161
func._dbus_interface = dbus_interface
1162
func._dbus_name = dbus_interface
1163
return func
1164
1165
return decorator
1166
1167
1168
def dbus_annotations(annotations):
1169
"""Decorator to annotate D-Bus methods, signals or properties
1170
Usage:
1171
1172
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
1173
"org.freedesktop.DBus.Property."
1174
"EmitsChangedSignal": "false"})
1175
@dbus_service_property("org.example.Interface", signature="b",
1176
access="r")
1177
def Property_dbus_property(self):
1178
return dbus.Boolean(False)
1179
1180
See also the DBusObjectWithAnnotations class.
1181
"""
1182
1183
def decorator(func):
1184
func._dbus_annotations = annotations
1185
return func
1186
590
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
591
return func
1187
592
return decorator
1188
593
1189
594
1190
595
class DBusPropertyException(dbus.exceptions.DBusException):
1191
596
"""A base class for D-Bus property-related exceptions
1192
597
"""
1193
pass
598
def __unicode__(self):
599
return unicode(str(self))
1194
600
1195
601
1196
602
class DBusPropertyAccessException(DBusPropertyException):
1205
611
pass
1206
612
1207
613
1208
class DBusObjectWithAnnotations(dbus.service.Object):
1209
"""A D-Bus object with annotations.
1210
1211
Classes inheriting from this can use the dbus_annotations
1212
decorator to add annotations to methods or signals.
1213
"""
1214
1215
@staticmethod
1216
def _is_dbus_thing(thing):
1217
"""Returns a function testing if an attribute is a D-Bus thing
1218
1219
If called like _is_dbus_thing("method") it returns a function
1220
suitable for use as predicate to inspect.getmembers().
1221
"""
1222
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
1223
False)
1224
1225
def _get_all_dbus_things(self, thing):
1226
"""Returns a generator of (name, attribute) pairs
1227
"""
1228
return ((getattr(athing.__get__(self), "_dbus_name", name),
1229
athing.__get__(self))
1230
for cls in self.__class__.__mro__
1231
for name, athing in
1232
inspect.getmembers(cls, self._is_dbus_thing(thing)))
1233
1234
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1235
out_signature="s",
1236
path_keyword='object_path',
1237
connection_keyword='connection')
1238
def Introspect(self, object_path, connection):
1239
"""Overloading of standard D-Bus method.
1240
1241
Inserts annotation tags on methods and signals.
1242
"""
1243
xmlstring = dbus.service.Object.Introspect(self, object_path,
1244
connection)
1245
try:
1246
document = xml.dom.minidom.parseString(xmlstring)
1247
1248
for if_tag in document.getElementsByTagName("interface"):
1249
# Add annotation tags
1250
for typ in ("method", "signal"):
1251
for tag in if_tag.getElementsByTagName(typ):
1252
annots = dict()
1253
for name, prop in (self.
1254
_get_all_dbus_things(typ)):
1255
if (name == tag.getAttribute("name")
1256
and prop._dbus_interface
1257
== if_tag.getAttribute("name")):
1258
annots.update(getattr(
1259
prop, "_dbus_annotations", {}))
1260
for name, value in annots.items():
1261
ann_tag = document.createElement(
1262
"annotation")
1263
ann_tag.setAttribute("name", name)
1264
ann_tag.setAttribute("value", value)
1265
tag.appendChild(ann_tag)
1266
# Add interface annotation tags
1267
for annotation, value in dict(
1268
itertools.chain.from_iterable(
1269
annotations().items()
1270
for name, annotations
1271
in self._get_all_dbus_things("interface")
1272
if name == if_tag.getAttribute("name")
1273
)).items():
1274
ann_tag = document.createElement("annotation")
1275
ann_tag.setAttribute("name", annotation)
1276
ann_tag.setAttribute("value", value)
1277
if_tag.appendChild(ann_tag)
1278
# Fix argument name for the Introspect method itself
1279
if (if_tag.getAttribute("name")
1280
== dbus.INTROSPECTABLE_IFACE):
1281
for cn in if_tag.getElementsByTagName("method"):
1282
if cn.getAttribute("name") == "Introspect":
1283
for arg in cn.getElementsByTagName("arg"):
1284
if (arg.getAttribute("direction")
1285
== "out"):
1286
arg.setAttribute("name",
1287
"xml_data")
1288
xmlstring = document.toxml("utf-8")
1289
document.unlink()
1290
except (AttributeError, xml.dom.DOMException,
1291
xml.parsers.expat.ExpatError) as error:
1292
logger.error("Failed to override Introspection method",
1293
exc_info=error)
1294
return xmlstring
1295
1296
1297
class DBusObjectWithProperties(DBusObjectWithAnnotations):
614
class DBusObjectWithProperties(dbus.service.Object):
1298
615
"""A D-Bus object with properties.
1299
616
1300
617
Classes inheriting from this can use the dbus_service_property
1301
618
decorator to expose methods as D-Bus properties. It exposes the
1302
619
standard Get(), Set(), and GetAll() methods on the D-Bus.
1303
620
"""
1304
621
622
@staticmethod
623
def _is_dbus_property(obj):
624
return getattr(obj, "_dbus_is_property", False)
625
626
def _get_all_dbus_properties(self):
627
"""Returns a generator of (name, attribute) pairs
628
"""
629
return ((prop._dbus_name, prop)
630
for name, prop in
631
inspect.getmembers(self, self._is_dbus_property))
632
1305
633
def _get_dbus_property(self, interface_name, property_name):
1306
634
"""Returns a bound method if one exists which is a D-Bus
1307
635
property with the specified name and interface.
1308
636
"""
1309
for cls in self.__class__.__mro__:
1310
for name, value in inspect.getmembers(
1311
cls, self._is_dbus_thing("property")):
1312
if (value._dbus_name == property_name
1313
and value._dbus_interface == interface_name):
1314
return value.__get__(self)
1315
637
for name in (property_name,
638
property_name + "_dbus_property"):
639
prop = getattr(self, name, None)
640
if (prop is None
641
or not self._is_dbus_property(prop)
642
or prop._dbus_name != property_name
643
or (interface_name and prop._dbus_interface
644
and interface_name != prop._dbus_interface)):
645
continue
646
return prop
1316
647
# No such property
1317
raise DBusPropertyNotFound("{}:{}.{}".format(
1318
self.dbus_object_path, interface_name, property_name))
1319
1320
@classmethod
1321
def _get_all_interface_names(cls):
1322
"""Get a sequence of all interfaces supported by an object"""
1323
return (name for name in set(getattr(getattr(x, attr),
1324
"_dbus_interface", None)
1325
for x in (inspect.getmro(cls))
1326
for attr in dir(x))
1327
if name is not None)
1328
1329
@dbus.service.method(dbus.PROPERTIES_IFACE,
1330
in_signature="ss",
648
raise DBusPropertyNotFound(self.dbus_object_path + ":"
649
+ interface_name + "."
650
+ property_name)
651
652
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
1331
653
out_signature="v")
1332
654
def Get(self, interface_name, property_name):
1333
655
"""Standard D-Bus property Get() method, see D-Bus standard.
1339
661
if not hasattr(value, "variant_level"):
1340
662
return value
1341
663
return type(value)(value, variant_level=value.variant_level+1)
1342
664
1343
665
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
1344
666
def Set(self, interface_name, property_name, value):
1345
667
"""Standard D-Bus property Set() method, see D-Bus standard.
1351
673
# The byte_arrays option is not supported yet on
1352
674
# signatures other than "ay".
1353
675
if prop._dbus_signature != "ay":
1354
raise ValueError("Byte arrays not supported for non-"
1355
"'ay' signature {!r}"
1356
.format(prop._dbus_signature))
1357
value = dbus.ByteArray(b''.join(chr(byte)
1358
for byte in value))
676
raise ValueError
677
value = dbus.ByteArray(''.join(unichr(byte)
678
for byte in value))
1359
679
prop(value)
1360
1361
@dbus.service.method(dbus.PROPERTIES_IFACE,
1362
in_signature="s",
680
681
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
1363
682
out_signature="a{sv}")
1364
683
def GetAll(self, interface_name):
1365
684
"""Standard D-Bus property GetAll() method, see D-Bus
1366
685
standard.
1367
686
1368
687
Note: Will not include properties with access="write".
1369
688
"""
1370
properties = {}
1371
for name, prop in self._get_all_dbus_things("property"):
689
all = {}
690
for name, prop in self._get_all_dbus_properties():
1372
691
if (interface_name
1373
692
and interface_name != prop._dbus_interface):
1374
693
# Interface non-empty but did not match
1378
697
continue
1379
698
value = prop()
1380
699
if not hasattr(value, "variant_level"):
1381
properties[name] = value
700
all[name] = value
1382
701
continue
1383
properties[name] = type(value)(
1384
value, variant_level=value.variant_level + 1)
1385
return dbus.Dictionary(properties, signature="sv")
1386
1387
@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
1388
def PropertiesChanged(self, interface_name, changed_properties,
1389
invalidated_properties):
1390
"""Standard D-Bus PropertiesChanged() signal, see D-Bus
1391
standard.
1392
"""
1393
pass
1394
702
all[name] = type(value)(value, variant_level=
703
value.variant_level+1)
704
return dbus.Dictionary(all, signature="sv")
705
1395
706
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1396
707
out_signature="s",
1397
708
path_keyword='object_path',
1398
709
connection_keyword='connection')
1399
710
def Introspect(self, object_path, connection):
1400
"""Overloading of standard D-Bus method.
1401
1402
Inserts property tags and interface annotation tags.
711
"""Standard D-Bus method, overloaded to insert property tags.
1403
712
"""
1404
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1405
object_path,
1406
connection)
713
xmlstring = dbus.service.Object.Introspect(self, object_path,
714
connection)
1407
715
try:
1408
716
document = xml.dom.minidom.parseString(xmlstring)
1409
1410
717
def make_tag(document, name, prop):
1411
718
e = document.createElement("property")
1412
719
e.setAttribute("name", name)
1413
720
e.setAttribute("type", prop._dbus_signature)
1414
721
e.setAttribute("access", prop._dbus_access)
1415
722
return e
1416
1417
723
for if_tag in document.getElementsByTagName("interface"):
1418
# Add property tags
1419
724
for tag in (make_tag(document, name, prop)
1420
725
for name, prop
1421
in self._get_all_dbus_things("property")
726
in self._get_all_dbus_properties()
1422
727
if prop._dbus_interface
1423
728
== if_tag.getAttribute("name")):
1424
729
if_tag.appendChild(tag)
1425
# Add annotation tags for properties
1426
for tag in if_tag.getElementsByTagName("property"):
1427
annots = dict()
1428
for name, prop in self._get_all_dbus_things(
1429
"property"):
1430
if (name == tag.getAttribute("name")
1431
and prop._dbus_interface
1432
== if_tag.getAttribute("name")):
1433
annots.update(getattr(
1434
prop, "_dbus_annotations", {}))
1435
for name, value in annots.items():
1436
ann_tag = document.createElement(
1437
"annotation")
1438
ann_tag.setAttribute("name", name)
1439
ann_tag.setAttribute("value", value)
1440
tag.appendChild(ann_tag)
1441
730
# Add the names to the return values for the
1442
731
# "org.freedesktop.DBus.Properties" methods
1443
732
if (if_tag.getAttribute("name")
1458
747
except (AttributeError, xml.dom.DOMException,
1459
748
xml.parsers.expat.ExpatError) as error:
1460
749
logger.error("Failed to override Introspection method",
1461
exc_info=error)
1462
return xmlstring
1463
1464
try:
1465
dbus.OBJECT_MANAGER_IFACE
1466
except AttributeError:
1467
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1468
1469
1470
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1471
"""A D-Bus object with an ObjectManager.
1472
1473
Classes inheriting from this exposes the standard
1474
GetManagedObjects call and the InterfacesAdded and
1475
InterfacesRemoved signals on the standard
1476
"org.freedesktop.DBus.ObjectManager" interface.
1477
1478
Note: No signals are sent automatically; they must be sent
1479
manually.
1480
"""
1481
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1482
out_signature="a{oa{sa{sv}}}")
1483
def GetManagedObjects(self):
1484
"""This function must be overridden"""
1485
raise NotImplementedError()
1486
1487
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1488
signature="oa{sa{sv}}")
1489
def InterfacesAdded(self, object_path, interfaces_and_properties):
1490
pass
1491
1492
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1493
def InterfacesRemoved(self, object_path, interfaces):
1494
pass
1495
1496
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1497
out_signature="s",
1498
path_keyword='object_path',
1499
connection_keyword='connection')
1500
def Introspect(self, object_path, connection):
1501
"""Overloading of standard D-Bus method.
1502
1503
Override return argument name of GetManagedObjects to be
1504
"objpath_interfaces_and_properties"
1505
"""
1506
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1507
object_path,
1508
connection)
1509
try:
1510
document = xml.dom.minidom.parseString(xmlstring)
1511
1512
for if_tag in document.getElementsByTagName("interface"):
1513
# Fix argument name for the GetManagedObjects method
1514
if (if_tag.getAttribute("name")
1515
== dbus.OBJECT_MANAGER_IFACE):
1516
for cn in if_tag.getElementsByTagName("method"):
1517
if (cn.getAttribute("name")
1518
== "GetManagedObjects"):
1519
for arg in cn.getElementsByTagName("arg"):
1520
if (arg.getAttribute("direction")
1521
== "out"):
1522
arg.setAttribute(
1523
"name",
1524
"objpath_interfaces"
1525
"_and_properties")
1526
xmlstring = document.toxml("utf-8")
1527
document.unlink()
1528
except (AttributeError, xml.dom.DOMException,
1529
xml.parsers.expat.ExpatError) as error:
1530
logger.error("Failed to override Introspection method",
1531
exc_info=error)
1532
return xmlstring
1533
1534
1535
def datetime_to_dbus(dt, variant_level=0):
750
error)
751
return xmlstring
752
753
754
def datetime_to_dbus (dt, variant_level=0):
1536
755
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1537
756
if dt is None:
1538
return dbus.String("", variant_level=variant_level)
1539
return dbus.String(dt.isoformat(), variant_level=variant_level)
1540
1541
1542
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1543
"""A class decorator; applied to a subclass of
1544
dbus.service.Object, it will add alternate D-Bus attributes with
1545
interface names according to the "alt_interface_names" mapping.
1546
Usage:
1547
1548
@alternate_dbus_interfaces({"org.example.Interface":
1549
"net.example.AlternateInterface"})
1550
class SampleDBusObject(dbus.service.Object):
1551
@dbus.service.method("org.example.Interface")
1552
def SampleDBusMethod():
1553
pass
1554
1555
The above "SampleDBusMethod" on "SampleDBusObject" will be
1556
reachable via two interfaces: "org.example.Interface" and
1557
"net.example.AlternateInterface", the latter of which will have
1558
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1559
"true", unless "deprecate" is passed with a False value.
1560
1561
This works for methods and signals, and also for D-Bus properties
1562
(from DBusObjectWithProperties) and interfaces (from the
1563
dbus_interface_annotations decorator).
1564
"""
1565
1566
def wrapper(cls):
1567
for orig_interface_name, alt_interface_name in (
1568
alt_interface_names.items()):
1569
attr = {}
1570
interface_names = set()
1571
# Go though all attributes of the class
1572
for attrname, attribute in inspect.getmembers(cls):
1573
# Ignore non-D-Bus attributes, and D-Bus attributes
1574
# with the wrong interface name
1575
if (not hasattr(attribute, "_dbus_interface")
1576
or not attribute._dbus_interface.startswith(
1577
orig_interface_name)):
1578
continue
1579
# Create an alternate D-Bus interface name based on
1580
# the current name
1581
alt_interface = attribute._dbus_interface.replace(
1582
orig_interface_name, alt_interface_name)
1583
interface_names.add(alt_interface)
1584
# Is this a D-Bus signal?
1585
if getattr(attribute, "_dbus_is_signal", False):
1586
# Extract the original non-method undecorated
1587
# function by black magic
1588
if sys.version_info.major == 2:
1589
nonmethod_func = (dict(
1590
zip(attribute.func_code.co_freevars,
1591
attribute.__closure__))
1592
["func"].cell_contents)
1593
else:
1594
nonmethod_func = (dict(
1595
zip(attribute.__code__.co_freevars,
1596
attribute.__closure__))
1597
["func"].cell_contents)
1598
# Create a new, but exactly alike, function
1599
# object, and decorate it to be a new D-Bus signal
1600
# with the alternate D-Bus interface name
1601
new_function = copy_function(nonmethod_func)
1602
new_function = (dbus.service.signal(
1603
alt_interface,
1604
attribute._dbus_signature)(new_function))
1605
# Copy annotations, if any
1606
try:
1607
new_function._dbus_annotations = dict(
1608
attribute._dbus_annotations)
1609
except AttributeError:
1610
pass
1611
1612
# Define a creator of a function to call both the
1613
# original and alternate functions, so both the
1614
# original and alternate signals gets sent when
1615
# the function is called
1616
def fixscope(func1, func2):
1617
"""This function is a scope container to pass
1618
func1 and func2 to the "call_both" function
1619
outside of its arguments"""
1620
1621
@functools.wraps(func2)
1622
def call_both(*args, **kwargs):
1623
"""This function will emit two D-Bus
1624
signals by calling func1 and func2"""
1625
func1(*args, **kwargs)
1626
func2(*args, **kwargs)
1627
# Make wrapper function look like a D-Bus
1628
# signal
1629
for name, attr in inspect.getmembers(func2):
1630
if name.startswith("_dbus_"):
1631
setattr(call_both, name, attr)
1632
1633
return call_both
1634
# Create the "call_both" function and add it to
1635
# the class
1636
attr[attrname] = fixscope(attribute, new_function)
1637
# Is this a D-Bus method?
1638
elif getattr(attribute, "_dbus_is_method", False):
1639
# Create a new, but exactly alike, function
1640
# object. Decorate it to be a new D-Bus method
1641
# with the alternate D-Bus interface name. Add it
1642
# to the class.
1643
attr[attrname] = (
1644
dbus.service.method(
1645
alt_interface,
1646
attribute._dbus_in_signature,
1647
attribute._dbus_out_signature)
1648
(copy_function(attribute)))
1649
# Copy annotations, if any
1650
try:
1651
attr[attrname]._dbus_annotations = dict(
1652
attribute._dbus_annotations)
1653
except AttributeError:
1654
pass
1655
# Is this a D-Bus property?
1656
elif getattr(attribute, "_dbus_is_property", False):
1657
# Create a new, but exactly alike, function
1658
# object, and decorate it to be a new D-Bus
1659
# property with the alternate D-Bus interface
1660
# name. Add it to the class.
1661
attr[attrname] = (dbus_service_property(
1662
alt_interface, attribute._dbus_signature,
1663
attribute._dbus_access,
1664
attribute._dbus_get_args_options
1665
["byte_arrays"])
1666
(copy_function(attribute)))
1667
# Copy annotations, if any
1668
try:
1669
attr[attrname]._dbus_annotations = dict(
1670
attribute._dbus_annotations)
1671
except AttributeError:
1672
pass
1673
# Is this a D-Bus interface?
1674
elif getattr(attribute, "_dbus_is_interface", False):
1675
# Create a new, but exactly alike, function
1676
# object. Decorate it to be a new D-Bus interface
1677
# with the alternate D-Bus interface name. Add it
1678
# to the class.
1679
attr[attrname] = (
1680
dbus_interface_annotations(alt_interface)
1681
(copy_function(attribute)))
1682
if deprecate:
1683
# Deprecate all alternate interfaces
1684
iname = "_AlternateDBusNames_interface_annotation{}"
1685
for interface_name in interface_names:
1686
1687
@dbus_interface_annotations(interface_name)
1688
def func(self):
1689
return {"org.freedesktop.DBus.Deprecated":
1690
"true"}
1691
# Find an unused name
1692
for aname in (iname.format(i)
1693
for i in itertools.count()):
1694
if aname not in attr:
1695
attr[aname] = func
1696
break
1697
if interface_names:
1698
# Replace the class with a new subclass of it with
1699
# methods, signals, etc. as created above.
1700
if sys.version_info.major == 2:
1701
cls = type(b"{}Alternate".format(cls.__name__),
1702
(cls, ), attr)
1703
else:
1704
cls = type("{}Alternate".format(cls.__name__),
1705
(cls, ), attr)
1706
return cls
1707
1708
return wrapper
1709
1710
1711
@alternate_dbus_interfaces({"se.recompile.Mandos":
1712
"se.bsnet.fukt.Mandos"})
757
return dbus.String("", variant_level = variant_level)
758
return dbus.String(dt.isoformat(),
759
variant_level=variant_level)
760
761
1713
762
class ClientDBus(Client, DBusObjectWithProperties):
1714
763
"""A Client class using D-Bus
1715
764
1716
765
Attributes:
1717
766
dbus_object_path: dbus.ObjectPath
1718
767
bus: dbus.SystemBus()
1719
768
"""
1720
769
1721
770
runtime_expansions = (Client.runtime_expansions
1722
+ ("dbus_object_path", ))
1723
1724
_interface = "se.recompile.Mandos.Client"
1725
771
+ ("dbus_object_path",))
772
1726
773
# dbus.service.Object doesn't use super(), so we can't either.
1727
1728
def __init__(self, bus=None, *args, **kwargs):
774
775
def __init__(self, bus = None, *args, **kwargs):
776
self._approvals_pending = 0
1729
777
self.bus = bus
1730
778
Client.__init__(self, *args, **kwargs)
1731
779
# Only now, when this client is initialized, can it show up on
1732
780
# the D-Bus
1733
client_object_name = str(self.name).translate(
781
client_object_name = unicode(self.name).translate(
1734
782
{ord("."): ord("_"),
1735
783
ord("-"): ord("_")})
1736
self.dbus_object_path = dbus.ObjectPath(
1737
"/clients/" + client_object_name)
784
self.dbus_object_path = (dbus.ObjectPath
785
("/clients/" + client_object_name))
1738
786
DBusObjectWithProperties.__init__(self, self.bus,
1739
787
self.dbus_object_path)
1740
1741
def notifychangeproperty(transform_func, dbus_name,
1742
type_func=lambda x: x,
1743
variant_level=1,
1744
invalidate_only=False,
1745
_interface=_interface):
1746
""" Modify a variable so that it's a property which announces
1747
its changes to DBus.
1748
1749
transform_fun: Function that takes a value and a variant_level
1750
and transforms it to a D-Bus type.
1751
dbus_name: D-Bus name of the variable
788
789
def notifychangeproperty(transform_func,
790
dbus_name, type_func=lambda x: x,
791
variant_level=1):
792
""" Modify a variable so that its a property that announce its
793
changes to DBus.
794
transform_fun: Function that takes a value and transform it to
795
DBus type.
796
dbus_name: DBus name of the variable
1752
797
type_func: Function that transform the value before sending it
1753
to the D-Bus. Default: no transform
1754
variant_level: D-Bus variant level. Default: 1
798
to DBus
799
variant_level: DBus variant level. default: 1
1755
800
"""
1756
attrname = "_{}".format(dbus_name)
1757
801
real_value = [None,]
1758
802
def setter(self, value):
803
old_value = real_value[0]
804
real_value[0] = value
1759
805
if hasattr(self, "dbus_object_path"):
1760
if (not hasattr(self, attrname) or
1761
type_func(getattr(self, attrname, None))
1762
!= type_func(value)):
1763
if invalidate_only:
1764
self.PropertiesChanged(
1765
_interface, dbus.Dictionary(),
1766
dbus.Array((dbus_name, )))
1767
else:
1768
dbus_value = transform_func(
1769
type_func(value),
1770
variant_level=variant_level)
1771
self.PropertyChanged(dbus.String(dbus_name),
1772
dbus_value)
1773
self.PropertiesChanged(
1774
_interface,
1775
dbus.Dictionary({dbus.String(dbus_name):
1776
dbus_value}),
1777
dbus.Array())
1778
setattr(self, attrname, value)
1779
1780
return property(lambda self: getattr(self, attrname), setter)
1781
806
if type_func(old_value) != type_func(real_value[0]):
807
dbus_value = transform_func(type_func(real_value[0]),
808
variant_level)
809
self.PropertyChanged(dbus.String(dbus_name),
810
dbus_value)
811
812
return property(lambda self: real_value[0], setter)
813
814
1782
815
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1783
816
approvals_pending = notifychangeproperty(dbus.Boolean,
1784
817
"ApprovalPending",
1785
type_func=bool)
818
type_func = bool)
1786
819
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1787
820
last_enabled = notifychangeproperty(datetime_to_dbus,
1788
821
"LastEnabled")
1789
checker = notifychangeproperty(
1790
dbus.Boolean, "CheckerRunning",
1791
type_func=lambda checker: checker is not None)
822
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
823
type_func = lambda checker: checker is not None)
1792
824
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1793
825
"LastCheckedOK")
1794
last_checker_status = notifychangeproperty(dbus.Int16,
1795
"LastCheckerStatus")
1796
last_approval_request = notifychangeproperty(
1797
datetime_to_dbus, "LastApprovalRequest")
826
last_approval_request = notifychangeproperty(datetime_to_dbus,
827
"LastApprovalRequest")
1798
828
approved_by_default = notifychangeproperty(dbus.Boolean,
1799
829
"ApprovedByDefault")
1800
approval_delay = notifychangeproperty(
1801
dbus.UInt64, "ApprovalDelay",
1802
type_func=lambda td: td.total_seconds() * 1000)
1803
approval_duration = notifychangeproperty(
1804
dbus.UInt64, "ApprovalDuration",
1805
type_func=lambda td: td.total_seconds() * 1000)
830
approval_delay = notifychangeproperty(dbus.UInt16, "ApprovalDelay",
831
type_func = _timedelta_to_milliseconds)
832
approval_duration = notifychangeproperty(dbus.UInt16, "ApprovalDuration",
833
type_func = _timedelta_to_milliseconds)
1806
834
host = notifychangeproperty(dbus.String, "Host")
1807
timeout = notifychangeproperty(
1808
dbus.UInt64, "Timeout",
1809
type_func=lambda td: td.total_seconds() * 1000)
1810
extended_timeout = notifychangeproperty(
1811
dbus.UInt64, "ExtendedTimeout",
1812
type_func=lambda td: td.total_seconds() * 1000)
1813
interval = notifychangeproperty(
1814
dbus.UInt64, "Interval",
1815
type_func=lambda td: td.total_seconds() * 1000)
835
timeout = notifychangeproperty(dbus.UInt16, "Timeout",
836
type_func = _timedelta_to_milliseconds)
837
extended_timeout = notifychangeproperty(dbus.UInt16, "ExtendedTimeout",
838
type_func = _timedelta_to_milliseconds)
839
interval = notifychangeproperty(dbus.UInt16, "Interval",
840
type_func = _timedelta_to_milliseconds)
1816
841
checker_command = notifychangeproperty(dbus.String, "Checker")
1817
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1818
invalidate_only=True)
1819
842
1820
843
del notifychangeproperty
1821
844
1822
845
def __del__(self, *args, **kwargs):
1823
846
try:
1824
847
self.remove_from_connection()
1827
850
if hasattr(DBusObjectWithProperties, "__del__"):
1828
851
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1829
852
Client.__del__(self, *args, **kwargs)
1830
1831
def checker_callback(self, source, condition,
1832
connection, command, *args, **kwargs):
1833
ret = Client.checker_callback(self, source, condition,
1834
connection, command, *args,
1835
**kwargs)
1836
exitstatus = self.last_checker_status
1837
if exitstatus >= 0:
853
854
def checker_callback(self, pid, condition, command,
855
*args, **kwargs):
856
self.checker_callback_tag = None
857
self.checker = None
858
if os.WIFEXITED(condition):
859
exitstatus = os.WEXITSTATUS(condition)
1838
860
# Emit D-Bus signal
1839
861
self.CheckerCompleted(dbus.Int16(exitstatus),
1840
# This is specific to GNU libC
1841
dbus.Int64(exitstatus << 8),
862
dbus.Int64(condition),
1842
863
dbus.String(command))
1843
864
else:
1844
865
# Emit D-Bus signal
1845
866
self.CheckerCompleted(dbus.Int16(-1),
1846
dbus.Int64(
1847
# This is specific to GNU libC
1848
(exitstatus << 8)
1849
| self.last_checker_signal),
867
dbus.Int64(condition),
1850
868
dbus.String(command))
1851
return ret
1852
869
870
return Client.checker_callback(self, pid, condition, command,
871
*args, **kwargs)
872
1853
873
def start_checker(self, *args, **kwargs):
1854
old_checker_pid = getattr(self.checker, "pid", None)
874
old_checker = self.checker
875
if self.checker is not None:
876
old_checker_pid = self.checker.pid
877
else:
878
old_checker_pid = None
1855
879
r = Client.start_checker(self, *args, **kwargs)
1856
880
# Only if new checker process was started
1857
881
if (self.checker is not None
1859
883
# Emit D-Bus signal
1860
884
self.CheckerStarted(self.current_checker_command)
1861
885
return r
1862
886
1863
887
def _reset_approved(self):
1864
self.approved = None
888
self._approved = None
1865
889
return False
1866
890
1867
891
def approve(self, value=True):
1868
self.approved = value
1869
GLib.timeout_add(int(self.approval_duration.total_seconds()
1870
* 1000), self._reset_approved)
1871
892
self.send_changedstate()
1872
1873
# D-Bus methods, signals & properties
1874
1875
# Interfaces
1876
1877
# Signals
1878
893
self._approved = value
894
gobject.timeout_add(_timedelta_to_milliseconds
895
(self.approval_duration),
896
self._reset_approved)
897
898
899
## D-Bus methods, signals & properties
900
_interface = "se.bsnet.fukt.Mandos.Client"
901
902
## Signals
903
1879
904
# CheckerCompleted - signal
1880
905
@dbus.service.signal(_interface, signature="nxs")
1881
906
def CheckerCompleted(self, exitcode, waitstatus, command):
1882
907
"D-Bus signal"
1883
908
pass
1884
909
1885
910
# CheckerStarted - signal
1886
911
@dbus.service.signal(_interface, signature="s")
1887
912
def CheckerStarted(self, command):
1888
913
"D-Bus signal"
1889
914
pass
1890
915
1891
916
# PropertyChanged - signal
1892
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1893
917
@dbus.service.signal(_interface, signature="sv")
1894
918
def PropertyChanged(self, property, value):
1895
919
"D-Bus signal"
1896
920
pass
1897
921
1898
922
# GotSecret - signal
1899
923
@dbus.service.signal(_interface)
1900
924
def GotSecret(self):
1903
927
server to mandos-client
1904
928
"""
1905
929
pass
1906
930
1907
931
# Rejected - signal
1908
932
@dbus.service.signal(_interface, signature="s")
1909
933
def Rejected(self, reason):
1910
934
"D-Bus signal"
1911
935
pass
1912
936
1913
937
# NeedApproval - signal
1914
938
@dbus.service.signal(_interface, signature="tb")
1915
939
def NeedApproval(self, timeout, default):
1916
940
"D-Bus signal"
1917
941
return self.need_approval()
1918
1919
# Methods
1920
942
943
## Methods
944
1921
945
# Approve - method
1922
946
@dbus.service.method(_interface, in_signature="b")
1923
947
def Approve(self, value):
1924
948
self.approve(value)
1925
949
1926
950
# CheckedOK - method
1927
951
@dbus.service.method(_interface)
1928
952
def CheckedOK(self):
1929
953
self.checked_ok()
1930
954
1931
955
# Enable - method
1932
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1933
956
@dbus.service.method(_interface)
1934
957
def Enable(self):
1935
958
"D-Bus method"
1936
959
self.enable()
1937
960
1938
961
# StartChecker - method
1939
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1940
962
@dbus.service.method(_interface)
1941
963
def StartChecker(self):
1942
964
"D-Bus method"
1943
965
self.start_checker()
1944
966
1945
967
# Disable - method
1946
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1947
968
@dbus.service.method(_interface)
1948
969
def Disable(self):
1949
970
"D-Bus method"
1950
971
self.disable()
1951
972
1952
973
# StopChecker - method
1953
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1954
974
@dbus.service.method(_interface)
1955
975
def StopChecker(self):
1956
976
self.stop_checker()
1957
1958
# Properties
1959
977
978
## Properties
979
1960
980
# ApprovalPending - property
1961
981
@dbus_service_property(_interface, signature="b", access="read")
1962
982
def ApprovalPending_dbus_property(self):
1963
983
return dbus.Boolean(bool(self.approvals_pending))
1964
984
1965
985
# ApprovedByDefault - property
1966
@dbus_service_property(_interface,
1967
signature="b",
986
@dbus_service_property(_interface, signature="b",
1968
987
access="readwrite")
1969
988
def ApprovedByDefault_dbus_property(self, value=None):
1970
989
if value is None: # get
1971
990
return dbus.Boolean(self.approved_by_default)
1972
991
self.approved_by_default = bool(value)
1973
992
1974
993
# ApprovalDelay - property
1975
@dbus_service_property(_interface,
1976
signature="t",
994
@dbus_service_property(_interface, signature="t",
1977
995
access="readwrite")
1978
996
def ApprovalDelay_dbus_property(self, value=None):
1979
997
if value is None: # get
1980
return dbus.UInt64(self.approval_delay.total_seconds()
1981
* 1000)
998
return dbus.UInt64(self.approval_delay_milliseconds())
1982
999
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1983
1000
1984
1001
# ApprovalDuration - property
1985
@dbus_service_property(_interface,
1986
signature="t",
1002
@dbus_service_property(_interface, signature="t",
1987
1003
access="readwrite")
1988
1004
def ApprovalDuration_dbus_property(self, value=None):
1989
1005
if value is None: # get
1990
return dbus.UInt64(self.approval_duration.total_seconds()
1991
* 1000)
1006
return dbus.UInt64(_timedelta_to_milliseconds(
1007
self.approval_duration))
1992
1008
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1993
1009
1994
1010
# Name - property
1995
@dbus_annotations(
1996
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1997
1011
@dbus_service_property(_interface, signature="s", access="read")
1998
1012
def Name_dbus_property(self):
1999
1013
return dbus.String(self.name)
2000
1014
2001
1015
# Fingerprint - property
2002
@dbus_annotations(
2003
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2004
1016
@dbus_service_property(_interface, signature="s", access="read")
2005
1017
def Fingerprint_dbus_property(self):
2006
1018
return dbus.String(self.fingerprint)
2007
1019
2008
1020
# Host - property
2009
@dbus_service_property(_interface,
2010
signature="s",
1021
@dbus_service_property(_interface, signature="s",
2011
1022
access="readwrite")
2012
1023
def Host_dbus_property(self, value=None):
2013
1024
if value is None: # get
2014
1025
return dbus.String(self.host)
2015
self.host = str(value)
2016
1026
self.host = value
1027
2017
1028
# Created - property
2018
@dbus_annotations(
2019
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2020
1029
@dbus_service_property(_interface, signature="s", access="read")
2021
1030
def Created_dbus_property(self):
2022
return datetime_to_dbus(self.created)
2023
1031
return dbus.String(datetime_to_dbus(self.created))
1032
2024
1033
# LastEnabled - property
2025
1034
@dbus_service_property(_interface, signature="s", access="read")
2026
1035
def LastEnabled_dbus_property(self):
2027
1036
return datetime_to_dbus(self.last_enabled)
2028
1037
2029
1038
# Enabled - property
2030
@dbus_service_property(_interface,
2031
signature="b",
1039
@dbus_service_property(_interface, signature="b",
2032
1040
access="readwrite")
2033
1041
def Enabled_dbus_property(self, value=None):
2034
1042
if value is None: # get
2037
1045
self.enable()
2038
1046
else:
2039
1047
self.disable()
2040
1048
2041
1049
# LastCheckedOK - property
2042
@dbus_service_property(_interface,
2043
signature="s",
1050
@dbus_service_property(_interface, signature="s",
2044
1051
access="readwrite")
2045
1052
def LastCheckedOK_dbus_property(self, value=None):
2046
1053
if value is not None:
2047
1054
self.checked_ok()
2048
1055
return
2049
1056
return datetime_to_dbus(self.last_checked_ok)
2050
2051
# LastCheckerStatus - property
2052
@dbus_service_property(_interface, signature="n", access="read")
2053
def LastCheckerStatus_dbus_property(self):
2054
return dbus.Int16(self.last_checker_status)
2055
1057
2056
1058
# Expires - property
2057
1059
@dbus_service_property(_interface, signature="s", access="read")
2058
1060
def Expires_dbus_property(self):
2059
1061
return datetime_to_dbus(self.expires)
2060
1062
2061
1063
# LastApprovalRequest - property
2062
1064
@dbus_service_property(_interface, signature="s", access="read")
2063
1065
def LastApprovalRequest_dbus_property(self):
2064
1066
return datetime_to_dbus(self.last_approval_request)
2065
1067
2066
1068
# Timeout - property
2067
@dbus_service_property(_interface,
2068
signature="t",
1069
@dbus_service_property(_interface, signature="t",
2069
1070
access="readwrite")
2070
1071
def Timeout_dbus_property(self, value=None):
2071
1072
if value is None: # get
2072
return dbus.UInt64(self.timeout.total_seconds() * 1000)
2073
old_timeout = self.timeout
1073
return dbus.UInt64(self.timeout_milliseconds())
2074
1074
self.timeout = datetime.timedelta(0, 0, 0, value)
2075
# Reschedule disabling
2076
if self.enabled:
2077
now = datetime.datetime.utcnow()
2078
self.expires += self.timeout - old_timeout
2079
if self.expires <= now:
2080
# The timeout has passed
2081
self.disable()
2082
else:
2083
if (getattr(self, "disable_initiator_tag", None)
2084
is None):
2085
return
2086
GLib.source_remove(self.disable_initiator_tag)
2087
self.disable_initiator_tag = GLib.timeout_add(
2088
int((self.expires - now).total_seconds() * 1000),
2089
self.disable)
2090
1075
if getattr(self, "disable_initiator_tag", None) is None:
1076
return
1077
# Reschedule timeout
1078
gobject.source_remove(self.disable_initiator_tag)
1079
self.disable_initiator_tag = None
1080
self.expires = None
1081
time_to_die = (self.
1082
_timedelta_to_milliseconds((self
1083
.last_checked_ok
1084
+ self.timeout)
1085
- datetime.datetime
1086
.utcnow()))
1087
if time_to_die <= 0:
1088
# The timeout has passed
1089
self.disable()
1090
else:
1091
self.expires = (datetime.datetime.utcnow()
1092
+ datetime.timedelta(milliseconds = time_to_die))
1093
self.disable_initiator_tag = (gobject.timeout_add
1094
(time_to_die, self.disable))
1095
2091
1096
# ExtendedTimeout - property
2092
@dbus_service_property(_interface,
2093
signature="t",
1097
@dbus_service_property(_interface, signature="t",
2094
1098
access="readwrite")
2095
1099
def ExtendedTimeout_dbus_property(self, value=None):
2096
1100
if value is None: # get
2097
return dbus.UInt64(self.extended_timeout.total_seconds()
2098
* 1000)
1101
return dbus.UInt64(self.extended_timeout_milliseconds())
2099
1102
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
2100
1103
2101
1104
# Interval - property
2102
@dbus_service_property(_interface,
2103
signature="t",
1105
@dbus_service_property(_interface, signature="t",
2104
1106
access="readwrite")
2105
1107
def Interval_dbus_property(self, value=None):
2106
1108
if value is None: # get
2107
return dbus.UInt64(self.interval.total_seconds() * 1000)
1109
return dbus.UInt64(self.interval_milliseconds())
2108
1110
self.interval = datetime.timedelta(0, 0, 0, value)
2109
1111
if getattr(self, "checker_initiator_tag", None) is None:
2110
1112
return
2111
if self.enabled:
2112
# Reschedule checker run
2113
GLib.source_remove(self.checker_initiator_tag)
2114
self.checker_initiator_tag = GLib.timeout_add(
2115
value, self.start_checker)
2116
self.start_checker() # Start one now, too
2117
1113
# Reschedule checker run
1114
gobject.source_remove(self.checker_initiator_tag)
1115
self.checker_initiator_tag = (gobject.timeout_add
1116
(value, self.start_checker))
1117
self.start_checker() # Start one now, too
1118
2118
1119
# Checker - property
2119
@dbus_service_property(_interface,
2120
signature="s",
1120
@dbus_service_property(_interface, signature="s",
2121
1121
access="readwrite")
2122
1122
def Checker_dbus_property(self, value=None):
2123
1123
if value is None: # get
2124
1124
return dbus.String(self.checker_command)
2125
self.checker_command = str(value)
2126
1125
self.checker_command = value
1126
2127
1127
# CheckerRunning - property
2128
@dbus_service_property(_interface,
2129
signature="b",
1128
@dbus_service_property(_interface, signature="b",
2130
1129
access="readwrite")
2131
1130
def CheckerRunning_dbus_property(self, value=None):
2132
1131
if value is None: # get
2135
1134
self.start_checker()
2136
1135
else:
2137
1136
self.stop_checker()
2138
1137
2139
1138
# ObjectPath - property
2140
@dbus_annotations(
2141
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
2142
"org.freedesktop.DBus.Deprecated": "true"})
2143
1139
@dbus_service_property(_interface, signature="o", access="read")
2144
1140
def ObjectPath_dbus_property(self):
2145
return self.dbus_object_path # is already a dbus.ObjectPath
2146
1141
return self.dbus_object_path # is already a dbus.ObjectPath
1142
2147
1143
# Secret = property
2148
@dbus_annotations(
2149
{"org.freedesktop.DBus.Property.EmitsChangedSignal":
2150
"invalidates"})
2151
@dbus_service_property(_interface,
2152
signature="ay",
2153
access="write",
2154
byte_arrays=True)
1144
@dbus_service_property(_interface, signature="ay",
1145
access="write", byte_arrays=True)
2155
1146
def Secret_dbus_property(self, value):
2156
self.secret = bytes(value)
2157
1147
self.secret = str(value)
1148
2158
1149
del _interface
2159
1150
2160
1151
2163
1154
self._pipe = child_pipe
2164
1155
self._pipe.send(('init', fpr, address))
2165
1156
if not self._pipe.recv():
2166
raise KeyError(fpr)
2167
1157
raise KeyError()
1158
2168
1159
def __getattribute__(self, name):
2169
if name == '_pipe':
1160
if(name == '_pipe'):
2170
1161
return super(ProxyClient, self).__getattribute__(name)
2171
1162
self._pipe.send(('getattr', name))
2172
1163
data = self._pipe.recv()
2173
1164
if data[0] == 'data':
2174
1165
return data[1]
2175
1166
if data[0] == 'function':
2176
2177
1167
def func(*args, **kwargs):
2178
1168
self._pipe.send(('funcall', name, args, kwargs))
2179
1169
return self._pipe.recv()[1]
2180
2181
1170
return func
2182
1171
2183
1172
def __setattr__(self, name, value):
2184
if name == '_pipe':
1173
if(name == '_pipe'):
2185
1174
return super(ProxyClient, self).__setattr__(name, value)
2186
1175
self._pipe.send(('setattr', name, value))
2187
1176
2188
1177
2189
1178
class ClientHandler(socketserver.BaseRequestHandler, object):
2190
1179
"""A class to handle client connections.
2191
1180
2192
1181
Instantiated once for each connection to handle it.
2193
1182
Note: This will run in its own forked process."""
2194
1183
2195
1184
def handle(self):
2196
1185
with contextlib.closing(self.server.child_pipe) as child_pipe:
2197
1186
logger.info("TCP connection from: %s",
2198
str(self.client_address))
1187
unicode(self.client_address))
2199
1188
logger.debug("Pipe FD: %d",
2200
1189
self.server.child_pipe.fileno())
2201
2202
session = gnutls.ClientSession(self.request)
2203
2204
# priority = ':'.join(("NONE", "+VERS-TLS1.1",
2205
# "+AES-256-CBC", "+SHA1",
2206
# "+COMP-NULL", "+CTYPE-OPENPGP",
2207
# "+DHE-DSS"))
1190
1191
session = (gnutls.connection
1192
.ClientSession(self.request,
1193
gnutls.connection
1194
.X509Credentials()))
1195
1196
# Note: gnutls.connection.X509Credentials is really a
1197
# generic GnuTLS certificate credentials object so long as
1198
# no X.509 keys are added to it. Therefore, we can use it
1199
# here despite using OpenPGP certificates.
1200
1201
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1202
# "+AES-256-CBC", "+SHA1",
1203
# "+COMP-NULL", "+CTYPE-OPENPGP",
1204
# "+DHE-DSS"))
2208
1205
# Use a fallback default, since this MUST be set.
2209
1206
priority = self.server.gnutls_priority
2210
1207
if priority is None:
2211
1208
priority = "NORMAL"
2212
gnutls.priority_set_direct(session._c_object,
2213
priority.encode("utf-8"),
2214
None)
2215
1209
(gnutls.library.functions
1210
.gnutls_priority_set_direct(session._c_object,
1211
priority, None))
1212
2216
1213
# Start communication using the Mandos protocol
2217
1214
# Get protocol number
2218
1215
line = self.request.makefile().readline()
2219
1216
logger.debug("Protocol version: %r", line)
2220
1217
try:
2221
1218
if int(line.strip().split()[0]) > 1:
2222
raise RuntimeError(line)
1219
raise RuntimeError
2223
1220
except (ValueError, IndexError, RuntimeError) as error:
2224
1221
logger.error("Unknown protocol version: %s", error)
2225
1222
return
2226
1223
2227
1224
# Start GnuTLS connection
2228
1225
try:
2229
1226
session.handshake()
2230
except gnutls.Error as error:
1227
except gnutls.errors.GNUTLSError as error:
2231
1228
logger.warning("Handshake failed: %s", error)
2232
1229
# Do not run session.bye() here: the session is not
2233
1230
# established. Just abandon the request.
2234
1231
return
2235
1232
logger.debug("Handshake succeeded")
2236
1233
2237
1234
approval_required = False
2238
1235
try:
2239
1236
try:
2240
fpr = self.fingerprint(
2241
self.peer_certificate(session))
2242
except (TypeError, gnutls.Error) as error:
1237
fpr = self.fingerprint(self.peer_certificate
1238
(session))
1239
except (TypeError,
1240
gnutls.errors.GNUTLSError) as error:
2243
1241
logger.warning("Bad certificate: %s", error)
2244
1242
return
2245
1243
logger.debug("Fingerprint: %s", fpr)
2246
1244
2247
1245
try:
2248
1246
client = ProxyClient(child_pipe, fpr,
2249
1247
self.client_address)
2250
1248
except KeyError:
2251
1249
return
2252
1250
2253
1251
if client.approval_delay:
2254
1252
delay = client.approval_delay
2255
1253
client.approvals_pending += 1
2256
1254
approval_required = True
2257
1255
2258
1256
while True:
2259
1257
if not client.enabled:
2260
1258
logger.info("Client %s is disabled",
2261
client.name)
1259
client.name)
2262
1260
if self.server.use_dbus:
2263
1261
# Emit D-Bus signal
2264
client.Rejected("Disabled")
1262
client.Rejected("Disabled")
2265
1263
return
2266
2267
if client.approved or not client.approval_delay:
2268
# We are approved or approval is disabled
1264
1265
if client._approved or not client.approval_delay:
1266
#We are approved or approval is disabled
2269
1267
break
2270
elif client.approved is None:
1268
elif client._approved is None:
2271
1269
logger.info("Client %s needs approval",
2272
1270
client.name)
2273
1271
if self.server.use_dbus:
2274
1272
# Emit D-Bus signal
2275
1273
client.NeedApproval(
2276
client.approval_delay.total_seconds()
2277
* 1000, client.approved_by_default)
1274
client.approval_delay_milliseconds(),
1275
client.approved_by_default)
2278
1276
else:
2279
1277
logger.warning("Client %s was not approved",
2280
1278
client.name)
2282
1280
# Emit D-Bus signal
2283
1281
client.Rejected("Denied")
2284
1282
return
2285
2286
# wait until timeout or approved
1283
1284
#wait until timeout or approved
1285
#x = float(client._timedelta_to_milliseconds(delay))
2287
1286
time = datetime.datetime.now()
2288
1287
client.changedstate.acquire()
2289
client.changedstate.wait(delay.total_seconds())
1288
client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))
2290
1289
client.changedstate.release()
2291
1290
time2 = datetime.datetime.now()
2292
1291
if (time2 - time) >= delay:
2302
1301
break
2303
1302
else:
2304
1303
delay -= time2 - time
2305
2306
try:
2307
session.send(client.secret)
2308
except gnutls.Error as error:
2309
logger.warning("gnutls send failed",
2310
exc_info=error)
2311
return
2312
1304
1305
sent_size = 0
1306
while sent_size < len(client.secret):
1307
try:
1308
sent = session.send(client.secret[sent_size:])
1309
except gnutls.errors.GNUTLSError as error:
1310
logger.warning("gnutls send failed")
1311
return
1312
logger.debug("Sent: %d, remaining: %d",
1313
sent, len(client.secret)
1314
- (sent_size + sent))
1315
sent_size += sent
1316
2313
1317
logger.info("Sending secret to %s", client.name)
2314
# bump the timeout using extended_timeout
2315
client.bump_timeout(client.extended_timeout)
1318
# bump the timeout as if seen
1319
client.checked_ok(client.extended_timeout)
2316
1320
if self.server.use_dbus:
2317
1321
# Emit D-Bus signal
2318
1322
client.GotSecret()
2319
1323
2320
1324
finally:
2321
1325
if approval_required:
2322
1326
client.approvals_pending -= 1
2323
1327
try:
2324
1328
session.bye()
2325
except gnutls.Error as error:
2326
logger.warning("GnuTLS bye failed",
2327
exc_info=error)
2328
1329
except gnutls.errors.GNUTLSError as error:
1330
logger.warning("GnuTLS bye failed")
1331
2329
1332
@staticmethod
2330
1333
def peer_certificate(session):
2331
1334
"Return the peer's OpenPGP certificate as a bytestring"
2332
1335
# If not an OpenPGP certificate...
2333
if (gnutls.certificate_type_get(session._c_object)
2334
!= gnutls.CRT_OPENPGP):
2335
# ...return invalid data
2336
return b""
1336
if (gnutls.library.functions
1337
.gnutls_certificate_type_get(session._c_object)
1338
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1339
# ...do the normal thing
1340
return session.peer_certificate
2337
1341
list_size = ctypes.c_uint(1)
2338
cert_list = (gnutls.certificate_get_peers
1342
cert_list = (gnutls.library.functions
1343
.gnutls_certificate_get_peers
2339
1344
(session._c_object, ctypes.byref(list_size)))
2340
1345
if not bool(cert_list) and list_size.value != 0:
2341
raise gnutls.Error("error getting peer certificate")
1346
raise gnutls.errors.GNUTLSError("error getting peer"
1347
" certificate")
2342
1348
if list_size.value == 0:
2343
1349
return None
2344
1350
cert = cert_list[0]
2345
1351
return ctypes.string_at(cert.data, cert.size)
2346
1352
2347
1353
@staticmethod
2348
1354
def fingerprint(openpgp):
2349
1355
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
2350
1356
# New GnuTLS "datum" with the OpenPGP public key
2351
datum = gnutls.datum_t(
2352
ctypes.cast(ctypes.c_char_p(openpgp),
2353
ctypes.POINTER(ctypes.c_ubyte)),
2354
ctypes.c_uint(len(openpgp)))
1357
datum = (gnutls.library.types
1358
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1359
ctypes.POINTER
1360
(ctypes.c_ubyte)),
1361
ctypes.c_uint(len(openpgp))))
2355
1362
# New empty GnuTLS certificate
2356
crt = gnutls.openpgp_crt_t()
2357
gnutls.openpgp_crt_init(ctypes.byref(crt))
1363
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1364
(gnutls.library.functions
1365
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
2358
1366
# Import the OpenPGP public key into the certificate
2359
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2360
gnutls.OPENPGP_FMT_RAW)
1367
(gnutls.library.functions
1368
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1369
gnutls.library.constants
1370
.GNUTLS_OPENPGP_FMT_RAW))
2361
1371
# Verify the self signature in the key
2362
1372
crtverify = ctypes.c_uint()
2363
gnutls.openpgp_crt_verify_self(crt, 0,
2364
ctypes.byref(crtverify))
1373
(gnutls.library.functions
1374
.gnutls_openpgp_crt_verify_self(crt, 0,
1375
ctypes.byref(crtverify)))
2365
1376
if crtverify.value != 0:
2366
gnutls.openpgp_crt_deinit(crt)
2367
raise gnutls.CertificateSecurityError("Verify failed")
1377
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1378
raise (gnutls.errors.CertificateSecurityError
1379
("Verify failed"))
2368
1380
# New buffer for the fingerprint
2369
1381
buf = ctypes.create_string_buffer(20)
2370
1382
buf_len = ctypes.c_size_t()
2371
1383
# Get the fingerprint from the certificate into the buffer
2372
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2373
ctypes.byref(buf_len))
1384
(gnutls.library.functions
1385
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1386
ctypes.byref(buf_len)))
2374
1387
# Deinit the certificate
2375
gnutls.openpgp_crt_deinit(crt)
1388
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2376
1389
# Convert the buffer to a Python bytestring
2377
1390
fpr = ctypes.string_at(buf, buf_len.value)
2378
1391
# Convert the bytestring to hexadecimal notation
2379
hex_fpr = binascii.hexlify(fpr).upper()
1392
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
2380
1393
return hex_fpr
2381
1394
2382
1395
2383
1396
class MultiprocessingMixIn(object):
2384
1397
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2385
2386
1398
def sub_process_main(self, request, address):
2387
1399
try:
2388
1400
self.finish_request(request, address)
2389
except Exception:
1401
except:
2390
1402
self.handle_error(request, address)
2391
1403
self.close_request(request)
2392
1404
2393
1405
def process_request(self, request, address):
2394
1406
"""Start a new process to process the request."""
2395
proc = multiprocessing.Process(target=self.sub_process_main,
2396
args=(request, address))
2397
proc.start()
2398
return proc
1407
multiprocessing.Process(target = self.sub_process_main,
1408
args = (request, address)).start()
2399
1409
2400
1410
2401
1411
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
2402
1412
""" adds a pipe to the MixIn """
2403
2404
1413
def process_request(self, request, client_address):
2405
1414
"""Overrides and wraps the original process_request().
2406
1415
2407
1416
This function creates a new pipe in self.pipe
2408
1417
"""
2409
1418
parent_pipe, self.child_pipe = multiprocessing.Pipe()
2410
2411
proc = MultiprocessingMixIn.process_request(self, request,
2412
client_address)
1419
1420
super(MultiprocessingMixInWithPipe,
1421
self).process_request(request, client_address)
2413
1422
self.child_pipe.close()
2414
self.add_pipe(parent_pipe, proc)
2415
2416
def add_pipe(self, parent_pipe, proc):
1423
self.add_pipe(parent_pipe)
1424
1425
def add_pipe(self, parent_pipe):
2417
1426
"""Dummy function; override as necessary"""
2418
raise NotImplementedError()
1427
raise NotImplementedError
2419
1428
2420
1429
2421
1430
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
2422
1431
socketserver.TCPServer, object):
2423
1432
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
2424
1433
2425
1434
Attributes:
2426
1435
enabled: Boolean; whether this server is activated yet
2427
1436
interface: None or a network interface name (string)
2428
1437
use_ipv6: Boolean; to use IPv6 or not
2429
1438
"""
2430
2431
1439
def __init__(self, server_address, RequestHandlerClass,
2432
interface=None,
2433
use_ipv6=True,
2434
socketfd=None):
2435
"""If socketfd is set, use that file descriptor instead of
2436
creating a new one with socket.socket().
2437
"""
1440
interface=None, use_ipv6=True):
2438
1441
self.interface = interface
2439
1442
if use_ipv6:
2440
1443
self.address_family = socket.AF_INET6
2441
if socketfd is not None:
2442
# Save the file descriptor
2443
self.socketfd = socketfd
2444
# Save the original socket.socket() function
2445
self.socket_socket = socket.socket
2446
2447
# To implement --socket, we monkey patch socket.socket.
2448
#
2449
# (When socketserver.TCPServer is a new-style class, we
2450
# could make self.socket into a property instead of monkey
2451
# patching socket.socket.)
2452
#
2453
# Create a one-time-only replacement for socket.socket()
2454
@functools.wraps(socket.socket)
2455
def socket_wrapper(*args, **kwargs):
2456
# Restore original function so subsequent calls are
2457
# not affected.
2458
socket.socket = self.socket_socket
2459
del self.socket_socket
2460
# This time only, return a new socket object from the
2461
# saved file descriptor.
2462
return socket.fromfd(self.socketfd, *args, **kwargs)
2463
# Replace socket.socket() function with wrapper
2464
socket.socket = socket_wrapper
2465
# The socketserver.TCPServer.__init__ will call
2466
# socket.socket(), which might be our replacement,
2467
# socket_wrapper(), if socketfd was set.
2468
1444
socketserver.TCPServer.__init__(self, server_address,
2469
1445
RequestHandlerClass)
2470
2471
1446
def server_bind(self):
2472
1447
"""This overrides the normal server_bind() function
2473
1448
to bind to an interface if one was specified, and also NOT to
2474
1449
bind to an address or port if they were not specified."""
2475
global SO_BINDTODEVICE
2476
1450
if self.interface is not None:
2477
1451
if SO_BINDTODEVICE is None:
2478
# Fall back to a hard-coded value which seems to be
2479
# common enough.
2480
logger.warning("SO_BINDTODEVICE not found, trying 25")
2481
SO_BINDTODEVICE = 25
2482
try:
2483
self.socket.setsockopt(
2484
socket.SOL_SOCKET, SO_BINDTODEVICE,
2485
(self.interface + "\0").encode("utf-8"))
2486
except socket.error as error:
2487
if error.errno == errno.EPERM:
2488
logger.error("No permission to bind to"
2489
" interface %s", self.interface)
2490
elif error.errno == errno.ENOPROTOOPT:
2491
logger.error("SO_BINDTODEVICE not available;"
2492
" cannot bind to interface %s",
2493
self.interface)
2494
elif error.errno == errno.ENODEV:
2495
logger.error("Interface %s does not exist,"
2496
" cannot bind", self.interface)
2497
else:
2498
raise
1452
logger.error("SO_BINDTODEVICE does not exist;"
1453
" cannot bind to interface %s",
1454
self.interface)
1455
else:
1456
try:
1457
self.socket.setsockopt(socket.SOL_SOCKET,
1458
SO_BINDTODEVICE,
1459
str(self.interface
1460
+ '\0'))
1461
except socket.error as error:
1462
if error[0] == errno.EPERM:
1463
logger.error("No permission to"
1464
" bind to interface %s",
1465
self.interface)
1466
elif error[0] == errno.ENOPROTOOPT:
1467
logger.error("SO_BINDTODEVICE not available;"
1468
" cannot bind to interface %s",
1469
self.interface)
1470
else:
1471
raise
2499
1472
# Only bind(2) the socket if we really need to.
2500
1473
if self.server_address[0] or self.server_address[1]:
2501
1474
if not self.server_address[0]:
2502
1475
if self.address_family == socket.AF_INET6:
2503
any_address = "::" # in6addr_any
1476
any_address = "::" # in6addr_any
2504
1477
else:
2505
any_address = "0.0.0.0" # INADDR_ANY
1478
any_address = socket.INADDR_ANY
2506
1479
self.server_address = (any_address,
2507
1480
self.server_address[1])
2508
1481
elif not self.server_address[1]:
2509
self.server_address = (self.server_address[0], 0)
1482
self.server_address = (self.server_address[0],
1483
0)
2510
1484
# if self.interface:
2511
1485
# self.server_address = (self.server_address[0],
2512
1486
# 0, # port
2518
1492
2519
1493
class MandosServer(IPv6_TCPServer):
2520
1494
"""Mandos server.
2521
1495
2522
1496
Attributes:
2523
1497
clients: set of Client objects
2524
1498
gnutls_priority GnuTLS priority string
2525
1499
use_dbus: Boolean; to emit D-Bus signals or not
2526
2527
Assumes a GLib.MainLoop event loop.
1500
1501
Assumes a gobject.MainLoop event loop.
2528
1502
"""
2529
2530
1503
def __init__(self, server_address, RequestHandlerClass,
2531
interface=None,
2532
use_ipv6=True,
2533
clients=None,
2534
gnutls_priority=None,
2535
use_dbus=True,
2536
socketfd=None):
1504
interface=None, use_ipv6=True, clients=None,
1505
gnutls_priority=None, use_dbus=True):
2537
1506
self.enabled = False
2538
1507
self.clients = clients
2539
1508
if self.clients is None:
2540
self.clients = {}
1509
self.clients = set()
2541
1510
self.use_dbus = use_dbus
2542
1511
self.gnutls_priority = gnutls_priority
2543
1512
IPv6_TCPServer.__init__(self, server_address,
2544
1513
RequestHandlerClass,
2545
interface=interface,
2546
use_ipv6=use_ipv6,
2547
socketfd=socketfd)
2548
1514
interface = interface,
1515
use_ipv6 = use_ipv6)
2549
1516
def server_activate(self):
2550
1517
if self.enabled:
2551
1518
return socketserver.TCPServer.server_activate(self)
2552
2553
1519
def enable(self):
2554
1520
self.enabled = True
2555
2556
def add_pipe(self, parent_pipe, proc):
1521
def add_pipe(self, parent_pipe):
2557
1522
# Call "handle_ipc" for both data and EOF events
2558
GLib.io_add_watch(
2559
parent_pipe.fileno(),
2560
GLib.IO_IN | GLib.IO_HUP,
2561
functools.partial(self.handle_ipc,
2562
parent_pipe=parent_pipe,
2563
proc=proc))
2564
2565
def handle_ipc(self, source, condition,
2566
parent_pipe=None,
2567
proc=None,
1523
gobject.io_add_watch(parent_pipe.fileno(),
1524
gobject.IO_IN | gobject.IO_HUP,
1525
functools.partial(self.handle_ipc,
1526
parent_pipe = parent_pipe))
1527
1528
def handle_ipc(self, source, condition, parent_pipe=None,
2568
1529
client_object=None):
2569
# error, or the other end of multiprocessing.Pipe has closed
2570
if condition & (GLib.IO_ERR | GLib.IO_HUP):
2571
# Wait for other process to exit
2572
proc.join()
1530
condition_names = {
1531
gobject.IO_IN: "IN", # There is data to read.
1532
gobject.IO_OUT: "OUT", # Data can be written (without
1533
# blocking).
1534
gobject.IO_PRI: "PRI", # There is urgent data to read.
1535
gobject.IO_ERR: "ERR", # Error condition.
1536
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1537
# broken, usually for pipes and
1538
# sockets).
1539
}
1540
conditions_string = ' | '.join(name
1541
for cond, name in
1542
condition_names.iteritems()
1543
if cond & condition)
1544
# error or the other end of multiprocessing.Pipe has closed
1545
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
2573
1546
return False
2574
1547
2575
1548
# Read a request from the child
2576
1549
request = parent_pipe.recv()
2577
1550
command = request[0]
2578
1551
2579
1552
if command == 'init':
2580
1553
fpr = request[1]
2581
1554
address = request[2]
2582
2583
for c in self.clients.values():
1555
1556
for c in self.clients:
2584
1557
if c.fingerprint == fpr:
2585
1558
client = c
2586
1559
break
2589
1562
"dress: %s", fpr, address)
2590
1563
if self.use_dbus:
2591
1564
# Emit D-Bus signal
2592
mandos_dbus_service.ClientNotFound(fpr,
2593
address[0])
1565
mandos_dbus_service.ClientNotFound(fpr, address[0])
2594
1566
parent_pipe.send(False)
2595
1567
return False
2596
2597
GLib.io_add_watch(
2598
parent_pipe.fileno(),
2599
GLib.IO_IN | GLib.IO_HUP,
2600
functools.partial(self.handle_ipc,
2601
parent_pipe=parent_pipe,
2602
proc=proc,
2603
client_object=client))
1568
1569
gobject.io_add_watch(parent_pipe.fileno(),
1570
gobject.IO_IN | gobject.IO_HUP,
1571
functools.partial(self.handle_ipc,
1572
parent_pipe = parent_pipe,
1573
client_object = client))
2604
1574
parent_pipe.send(True)
2605
# remove the old hook in favor of the new above hook on
2606
# same fileno
1575
# remove the old hook in favor of the new above hook on same fileno
2607
1576
return False
2608
1577
if command == 'funcall':
2609
1578
funcname = request[1]
2610
1579
args = request[2]
2611
1580
kwargs = request[3]
2612
2613
parent_pipe.send(('data', getattr(client_object,
2614
funcname)(*args,
2615
**kwargs)))
2616
1581
1582
parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))
1583
2617
1584
if command == 'getattr':
2618
1585
attrname = request[1]
2619
if isinstance(client_object.__getattribute__(attrname),
2620
collections.Callable):
2621
parent_pipe.send(('function', ))
1586
if callable(client_object.__getattribute__(attrname)):
1587
parent_pipe.send(('function',))
2622
1588
else:
2623
parent_pipe.send((
2624
'data', client_object.__getattribute__(attrname)))
2625
1589
parent_pipe.send(('data', client_object.__getattribute__(attrname)))
1590
2626
1591
if command == 'setattr':
2627
1592
attrname = request[1]
2628
1593
value = request[2]
2629
1594
setattr(client_object, attrname, value)
2630
1595
2631
1596
return True
2632
1597
2633
1598
2634
def rfc3339_duration_to_delta(duration):
2635
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2636
2637
>>> rfc3339_duration_to_delta("P7D")
2638
datetime.timedelta(7)
2639
>>> rfc3339_duration_to_delta("PT60S")
2640
datetime.timedelta(0, 60)
2641
>>> rfc3339_duration_to_delta("PT60M")
2642
datetime.timedelta(0, 3600)
2643
>>> rfc3339_duration_to_delta("PT24H")
2644
datetime.timedelta(1)
2645
>>> rfc3339_duration_to_delta("P1W")
2646
datetime.timedelta(7)
2647
>>> rfc3339_duration_to_delta("PT5M30S")
2648
datetime.timedelta(0, 330)
2649
>>> rfc3339_duration_to_delta("P1DT3M20S")
2650
datetime.timedelta(1, 200)
2651
"""
2652
2653
# Parsing an RFC 3339 duration with regular expressions is not
2654
# possible - there would have to be multiple places for the same
2655
# values, like seconds. The current code, while more esoteric, is
2656
# cleaner without depending on a parsing library. If Python had a
2657
# built-in library for parsing we would use it, but we'd like to
2658
# avoid excessive use of external libraries.
2659
2660
# New type for defining tokens, syntax, and semantics all-in-one
2661
Token = collections.namedtuple("Token", (
2662
"regexp", # To match token; if "value" is not None, must have
2663
# a "group" containing digits
2664
"value", # datetime.timedelta or None
2665
"followers")) # Tokens valid after this token
2666
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2667
# the "duration" ABNF definition in RFC 3339, Appendix A.
2668
token_end = Token(re.compile(r"$"), None, frozenset())
2669
token_second = Token(re.compile(r"(\d+)S"),
2670
datetime.timedelta(seconds=1),
2671
frozenset((token_end, )))
2672
token_minute = Token(re.compile(r"(\d+)M"),
2673
datetime.timedelta(minutes=1),
2674
frozenset((token_second, token_end)))
2675
token_hour = Token(re.compile(r"(\d+)H"),
2676
datetime.timedelta(hours=1),
2677
frozenset((token_minute, token_end)))
2678
token_time = Token(re.compile(r"T"),
2679
None,
2680
frozenset((token_hour, token_minute,
2681
token_second)))
2682
token_day = Token(re.compile(r"(\d+)D"),
2683
datetime.timedelta(days=1),
2684
frozenset((token_time, token_end)))
2685
token_month = Token(re.compile(r"(\d+)M"),
2686
datetime.timedelta(weeks=4),
2687
frozenset((token_day, token_end)))
2688
token_year = Token(re.compile(r"(\d+)Y"),
2689
datetime.timedelta(weeks=52),
2690
frozenset((token_month, token_end)))
2691
token_week = Token(re.compile(r"(\d+)W"),
2692
datetime.timedelta(weeks=1),
2693
frozenset((token_end, )))
2694
token_duration = Token(re.compile(r"P"), None,
2695
frozenset((token_year, token_month,
2696
token_day, token_time,
2697
token_week)))
2698
# Define starting values:
2699
# Value so far
2700
value = datetime.timedelta()
2701
found_token = None
2702
# Following valid tokens
2703
followers = frozenset((token_duration, ))
2704
# String left to parse
2705
s = duration
2706
# Loop until end token is found
2707
while found_token is not token_end:
2708
# Search for any currently valid tokens
2709
for token in followers:
2710
match = token.regexp.match(s)
2711
if match is not None:
2712
# Token found
2713
if token.value is not None:
2714
# Value found, parse digits
2715
factor = int(match.group(1), 10)
2716
# Add to value so far
2717
value += factor * token.value
2718
# Strip token from string
2719
s = token.regexp.sub("", s, 1)
2720
# Go to found token
2721
found_token = token
2722
# Set valid next tokens
2723
followers = found_token.followers
2724
break
2725
else:
2726
# No currently valid tokens were found
2727
raise ValueError("Invalid RFC 3339 duration: {!r}"
2728
.format(duration))
2729
# End token found
2730
return value
2731
2732
2733
1599
def string_to_delta(interval):
2734
1600
"""Parse a string and return a datetime.timedelta
2735
1601
2736
1602
>>> string_to_delta('7d')
2737
1603
datetime.timedelta(7)
2738
1604
>>> string_to_delta('60s')
2746
1612
>>> string_to_delta('5m 30s')
2747
1613
datetime.timedelta(0, 330)
2748
1614
"""
2749
2750
try:
2751
return rfc3339_duration_to_delta(interval)
2752
except ValueError:
2753
pass
2754
2755
1615
timevalue = datetime.timedelta(0)
2756
1616
for s in interval.split():
2757
1617
try:
2758
suffix = s[-1]
1618
suffix = unicode(s[-1])
2759
1619
value = int(s[:-1])
2760
1620
if suffix == "d":
2761
1621
delta = datetime.timedelta(value)
2768
1628
elif suffix == "w":
2769
1629
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
2770
1630
else:
2771
raise ValueError("Unknown suffix {!r}".format(suffix))
2772
except IndexError as e:
1631
raise ValueError("Unknown suffix %r" % suffix)
1632
except (ValueError, IndexError) as e:
2773
1633
raise ValueError(*(e.args))
2774
1634
timevalue += delta
2775
1635
return timevalue
2776
1636
2777
1637
2778
def daemon(nochdir=False, noclose=False):
1638
def if_nametoindex(interface):
1639
"""Call the C function if_nametoindex(), or equivalent
1640
1641
Note: This function cannot accept a unicode string."""
1642
global if_nametoindex
1643
try:
1644
if_nametoindex = (ctypes.cdll.LoadLibrary
1645
(ctypes.util.find_library("c"))
1646
.if_nametoindex)
1647
except (OSError, AttributeError):
1648
logger.warning("Doing if_nametoindex the hard way")
1649
def if_nametoindex(interface):
1650
"Get an interface index the hard way, i.e. using fcntl()"
1651
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1652
with contextlib.closing(socket.socket()) as s:
1653
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1654
struct.pack(str("16s16x"),
1655
interface))
1656
interface_index = struct.unpack(str("I"),
1657
ifreq[16:20])[0]
1658
return interface_index
1659
return if_nametoindex(interface)
1660
1661
1662
def daemon(nochdir = False, noclose = False):
2779
1663
"""See daemon(3). Standard BSD Unix function.
2780
1664
2781
1665
This should really exist as os.daemon, but it doesn't (yet)."""
2782
1666
if os.fork():
2783
1667
sys.exit()
2788
1672
sys.exit()
2789
1673
if not noclose:
2790
1674
# Close all standard open file descriptors
2791
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1675
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2792
1676
if not stat.S_ISCHR(os.fstat(null).st_mode):
2793
1677
raise OSError(errno.ENODEV,
2794
"{} not a character device"
2795
.format(os.devnull))
1678
"%s not a character device"
1679
% os.path.devnull)
2796
1680
os.dup2(null, sys.stdin.fileno())
2797
1681
os.dup2(null, sys.stdout.fileno())
2798
1682
os.dup2(null, sys.stderr.fileno())
2801
1685
2802
1686
2803
1687
def main():
2804
1688
2805
1689
##################################################################
2806
1690
# Parsing of options, both command line and config file
2807
1691
2808
1692
parser = argparse.ArgumentParser()
2809
1693
parser.add_argument("-v", "--version", action="version",
2810
version="%(prog)s {}".format(version),
1694
version = "%%(prog)s %s" % version,
2811
1695
help="show version number and exit")
2812
1696
parser.add_argument("-i", "--interface", metavar="IF",
2813
1697
help="Bind to interface IF")
2819
1703
help="Run self-test")
2820
1704
parser.add_argument("--debug", action="store_true",
2821
1705
help="Debug mode; run in foreground and log"
2822
" to terminal", default=None)
1706
" to terminal")
2823
1707
parser.add_argument("--debuglevel", metavar="LEVEL",
2824
1708
help="Debug level for stdout output")
2825
1709
parser.add_argument("--priority", help="GnuTLS"
2832
1716
" files")
2833
1717
parser.add_argument("--no-dbus", action="store_false",
2834
1718
dest="use_dbus", help="Do not provide D-Bus"
2835
" system bus interface", default=None)
1719
" system bus interface")
2836
1720
parser.add_argument("--no-ipv6", action="store_false",
2837
dest="use_ipv6", help="Do not use IPv6",
2838
default=None)
2839
parser.add_argument("--no-restore", action="store_false",
2840
dest="restore", help="Do not restore stored"
2841
" state", default=None)
2842
parser.add_argument("--socket", type=int,
2843
help="Specify a file descriptor to a network"
2844
" socket to use instead of creating one")
2845
parser.add_argument("--statedir", metavar="DIR",
2846
help="Directory to save/restore state in")
2847
parser.add_argument("--foreground", action="store_true",
2848
help="Run in foreground", default=None)
2849
parser.add_argument("--no-zeroconf", action="store_false",
2850
dest="zeroconf", help="Do not use Zeroconf",
2851
default=None)
2852
1721
dest="use_ipv6", help="Do not use IPv6")
2853
1722
options = parser.parse_args()
2854
1723
2855
1724
if options.check:
2856
1725
import doctest
2857
fail_count, test_count = doctest.testmod()
2858
sys.exit(os.EX_OK if fail_count == 0 else 1)
2859
1726
doctest.testmod()
1727
sys.exit()
1728
2860
1729
# Default values for config file for server-global settings
2861
server_defaults = {"interface": "",
2862
"address": "",
2863
"port": "",
2864
"debug": "False",
2865
"priority":
2866
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2867
":+SIGN-DSA-SHA256",
2868
"servicename": "Mandos",
2869
"use_dbus": "True",
2870
"use_ipv6": "True",
2871
"debuglevel": "",
2872
"restore": "True",
2873
"socket": "",
2874
"statedir": "/var/lib/mandos",
2875
"foreground": "False",
2876
"zeroconf": "True",
2877
}
2878
1730
server_defaults = { "interface": "",
1731
"address": "",
1732
"port": "",
1733
"debug": "False",
1734
"priority":
1735
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1736
"servicename": "Mandos",
1737
"use_dbus": "True",
1738
"use_ipv6": "True",
1739
"debuglevel": "",
1740
}
1741
2879
1742
# Parse config file for server-global settings
2880
1743
server_config = configparser.SafeConfigParser(server_defaults)
2881
1744
del server_defaults
2882
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1745
server_config.read(os.path.join(options.configdir,
1746
"mandos.conf"))
2883
1747
# Convert the SafeConfigParser object to a dict
2884
1748
server_settings = server_config.defaults()
2885
1749
# Use the appropriate methods on the non-string config options
2886
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
1750
for option in ("debug", "use_dbus", "use_ipv6"):
2887
1751
server_settings[option] = server_config.getboolean("DEFAULT",
2888
1752
option)
2889
1753
if server_settings["port"]:
2890
1754
server_settings["port"] = server_config.getint("DEFAULT",
2891
1755
"port")
2892
if server_settings["socket"]:
2893
server_settings["socket"] = server_config.getint("DEFAULT",
2894
"socket")
2895
# Later, stdin will, and stdout and stderr might, be dup'ed
2896
# over with an opened os.devnull. But we don't want this to
2897
# happen with a supplied network socket.
2898
if 0 <= server_settings["socket"] <= 2:
2899
server_settings["socket"] = os.dup(server_settings
2900
["socket"])
2901
1756
del server_config
2902
1757
2903
1758
# Override the settings from the config file with command line
2904
1759
# options, if set.
2905
1760
for option in ("interface", "address", "port", "debug",
2906
"priority", "servicename", "configdir", "use_dbus",
2907
"use_ipv6", "debuglevel", "restore", "statedir",
2908
"socket", "foreground", "zeroconf"):
1761
"priority", "servicename", "configdir",
1762
"use_dbus", "use_ipv6", "debuglevel"):
2909
1763
value = getattr(options, option)
2910
1764
if value is not None:
2911
1765
server_settings[option] = value
2912
1766
del options
2913
1767
# Force all strings to be unicode
2914
1768
for option in server_settings.keys():
2915
if isinstance(server_settings[option], bytes):
2916
server_settings[option] = (server_settings[option]
2917
.decode("utf-8"))
2918
# Force all boolean options to be boolean
2919
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2920
"foreground", "zeroconf"):
2921
server_settings[option] = bool(server_settings[option])
2922
# Debug implies foreground
2923
if server_settings["debug"]:
2924
server_settings["foreground"] = True
1769
if type(server_settings[option]) is str:
1770
server_settings[option] = unicode(server_settings[option])
2925
1771
# Now we have our good server settings in "server_settings"
2926
1772
2927
1773
##################################################################
2928
2929
if (not server_settings["zeroconf"]
2930
and not (server_settings["port"]
2931
or server_settings["socket"] != "")):
2932
parser.error("Needs port or socket to work without Zeroconf")
2933
1774
2934
1775
# For convenience
2935
1776
debug = server_settings["debug"]
2936
1777
debuglevel = server_settings["debuglevel"]
2937
1778
use_dbus = server_settings["use_dbus"]
2938
1779
use_ipv6 = server_settings["use_ipv6"]
2939
stored_state_path = os.path.join(server_settings["statedir"],
2940
stored_state_file)
2941
foreground = server_settings["foreground"]
2942
zeroconf = server_settings["zeroconf"]
2943
2944
if debug:
2945
initlogger(debug, logging.DEBUG)
2946
else:
2947
if not debuglevel:
2948
initlogger(debug)
2949
else:
2950
level = getattr(logging, debuglevel.upper())
2951
initlogger(debug, level)
2952
1780
2953
1781
if server_settings["servicename"] != "Mandos":
2954
syslogger.setFormatter(
2955
logging.Formatter('Mandos ({}) [%(process)d]:'
2956
' %(levelname)s: %(message)s'.format(
2957
server_settings["servicename"])))
2958
1782
syslogger.setFormatter(logging.Formatter
1783
('Mandos (%s) [%%(process)d]:'
1784
' %%(levelname)s: %%(message)s'
1785
% server_settings["servicename"]))
1786
2959
1787
# Parse config file with clients
2960
client_config = configparser.SafeConfigParser(Client
2961
.client_defaults)
1788
client_defaults = { "timeout": "5m",
1789
"extended_timeout": "15m",
1790
"interval": "2m",
1791
"checker": "fping -q -- %%(host)s",
1792
"host": "",
1793
"approval_delay": "0s",
1794
"approval_duration": "1s",
1795
}
1796
client_config = configparser.SafeConfigParser(client_defaults)
2962
1797
client_config.read(os.path.join(server_settings["configdir"],
2963
1798
"clients.conf"))
2964
1799
2965
1800
global mandos_dbus_service
2966
1801
mandos_dbus_service = None
2967
2968
socketfd = None
2969
if server_settings["socket"] != "":
2970
socketfd = server_settings["socket"]
2971
tcp_server = MandosServer(
2972
(server_settings["address"], server_settings["port"]),
2973
ClientHandler,
2974
interface=(server_settings["interface"] or None),
2975
use_ipv6=use_ipv6,
2976
gnutls_priority=server_settings["priority"],
2977
use_dbus=use_dbus,
2978
socketfd=socketfd)
2979
if not foreground:
2980
pidfilename = "/run/mandos.pid"
2981
if not os.path.isdir("/run/."):
2982
pidfilename = "/var/run/mandos.pid"
2983
pidfile = None
2984
try:
2985
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
2986
except IOError as e:
2987
logger.error("Could not open file %r", pidfilename,
2988
exc_info=e)
2989
2990
for name, group in (("_mandos", "_mandos"),
2991
("mandos", "mandos"),
2992
("nobody", "nogroup")):
2993
try:
2994
uid = pwd.getpwnam(name).pw_uid
2995
gid = pwd.getpwnam(group).pw_gid
2996
break
1802
1803
tcp_server = MandosServer((server_settings["address"],
1804
server_settings["port"]),
1805
ClientHandler,
1806
interface=(server_settings["interface"]
1807
or None),
1808
use_ipv6=use_ipv6,
1809
gnutls_priority=
1810
server_settings["priority"],
1811
use_dbus=use_dbus)
1812
if not debug:
1813
pidfilename = "/var/run/mandos.pid"
1814
try:
1815
pidfile = open(pidfilename, "w")
1816
except IOError:
1817
logger.error("Could not open file %r", pidfilename)
1818
1819
try:
1820
uid = pwd.getpwnam("_mandos").pw_uid
1821
gid = pwd.getpwnam("_mandos").pw_gid
1822
except KeyError:
1823
try:
1824
uid = pwd.getpwnam("mandos").pw_uid
1825
gid = pwd.getpwnam("mandos").pw_gid
2997
1826
except KeyError:
2998
continue
2999
else:
3000
uid = 65534
3001
gid = 65534
1827
try:
1828
uid = pwd.getpwnam("nobody").pw_uid
1829
gid = pwd.getpwnam("nobody").pw_gid
1830
except KeyError:
1831
uid = 65534
1832
gid = 65534
3002
1833
try:
3003
1834
os.setgid(gid)
3004
1835
os.setuid(uid)
3005
if debug:
3006
logger.debug("Did setuid/setgid to {}:{}".format(uid,
3007
gid))
3008
1836
except OSError as error:
3009
logger.warning("Failed to setuid/setgid to {}:{}: {}"
3010
.format(uid, gid, os.strerror(error.errno)))
3011
if error.errno != errno.EPERM:
3012
raise
3013
1837
if error[0] != errno.EPERM:
1838
raise error
1839
1840
if not debug and not debuglevel:
1841
syslogger.setLevel(logging.WARNING)
1842
console.setLevel(logging.WARNING)
1843
if debuglevel:
1844
level = getattr(logging, debuglevel.upper())
1845
syslogger.setLevel(level)
1846
console.setLevel(level)
1847
3014
1848
if debug:
3015
1849
# Enable all possible GnuTLS debugging
3016
1850
3017
1851
# "Use a log level over 10 to enable all debugging options."
3018
1852
# - GnuTLS manual
3019
gnutls.global_set_log_level(11)
3020
3021
@gnutls.log_func
1853
gnutls.library.functions.gnutls_global_set_log_level(11)
1854
1855
@gnutls.library.types.gnutls_log_func
3022
1856
def debug_gnutls(level, string):
3023
1857
logger.debug("GnuTLS: %s", string[:-1])
3024
3025
gnutls.global_set_log_function(debug_gnutls)
3026
1858
1859
(gnutls.library.functions
1860
.gnutls_global_set_log_function(debug_gnutls))
1861
3027
1862
# Redirect stdin so all checkers get /dev/null
3028
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1863
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
3029
1864
os.dup2(null, sys.stdin.fileno())
3030
1865
if null > 2:
3031
1866
os.close(null)
3032
1867
else:
1868
# No console logging
1869
logger.removeHandler(console)
1870
3033
1871
# Need to fork before connecting to D-Bus
3034
if not foreground:
1872
if not debug:
3035
1873
# Close all input and output, do double fork, etc.
3036
1874
daemon()
3037
3038
# multiprocessing will use threads, so before we use GLib we need
3039
# to inform GLib that threads will be used.
3040
GLib.threads_init()
3041
1875
3042
1876
global main_loop
3043
1877
# From the Avahi example code
3044
DBusGMainLoop(set_as_default=True)
3045
main_loop = GLib.MainLoop()
1878
DBusGMainLoop(set_as_default=True )
1879
main_loop = gobject.MainLoop()
3046
1880
bus = dbus.SystemBus()
3047
1881
# End of Avahi example code
3048
1882
if use_dbus:
3049
1883
try:
3050
bus_name = dbus.service.BusName("se.recompile.Mandos",
3051
bus,
3052
do_not_queue=True)
3053
old_bus_name = dbus.service.BusName(
3054
"se.bsnet.fukt.Mandos", bus,
3055
do_not_queue=True)
3056
except dbus.exceptions.DBusException as e:
3057
logger.error("Disabling D-Bus:", exc_info=e)
1884
bus_name = dbus.service.BusName("se.bsnet.fukt.Mandos",
1885
bus, do_not_queue=True)
1886
except dbus.exceptions.NameExistsException as e:
1887
logger.error(unicode(e) + ", disabling D-Bus")
3058
1888
use_dbus = False
3059
1889
server_settings["use_dbus"] = False
3060
1890
tcp_server.use_dbus = False
3061
if zeroconf:
3062
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3063
service = AvahiServiceToSyslog(
3064
name=server_settings["servicename"],
3065
servicetype="_mandos._tcp",
3066
protocol=protocol,
3067
bus=bus)
3068
if server_settings["interface"]:
3069
service.interface = if_nametoindex(
3070
server_settings["interface"].encode("utf-8"))
3071
1891
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1892
service = AvahiService(name = server_settings["servicename"],
1893
servicetype = "_mandos._tcp",
1894
protocol = protocol, bus = bus)
1895
if server_settings["interface"]:
1896
service.interface = (if_nametoindex
1897
(str(server_settings["interface"])))
1898
3072
1899
global multiprocessing_manager
3073
1900
multiprocessing_manager = multiprocessing.Manager()
3074
1901
3075
1902
client_class = Client
3076
1903
if use_dbus:
3077
client_class = functools.partial(ClientDBus, bus=bus)
3078
3079
client_settings = Client.config_parser(client_config)
3080
old_client_settings = {}
3081
clients_data = {}
3082
3083
# This is used to redirect stdout and stderr for checker processes
3084
global wnull
3085
wnull = open(os.devnull, "w") # A writable /dev/null
3086
# Only used if server is running in foreground but not in debug
3087
# mode
3088
if debug or not foreground:
3089
wnull.close()
3090
3091
# Get client data and settings from last running state.
3092
if server_settings["restore"]:
3093
try:
3094
with open(stored_state_path, "rb") as stored_state:
3095
if sys.version_info.major == 2:
3096
clients_data, old_client_settings = pickle.load(
3097
stored_state)
3098
else:
3099
bytes_clients_data, bytes_old_client_settings = (
3100
pickle.load(stored_state, encoding="bytes"))
3101
# Fix bytes to strings
3102
# clients_data
3103
# .keys()
3104
clients_data = {(key.decode("utf-8")
3105
if isinstance(key, bytes)
3106
else key): value
3107
for key, value in
3108
bytes_clients_data.items()}
3109
del bytes_clients_data
3110
for key in clients_data:
3111
value = {(k.decode("utf-8")
3112
if isinstance(k, bytes) else k): v
3113
for k, v in
3114
clients_data[key].items()}
3115
clients_data[key] = value
3116
# .client_structure
3117
value["client_structure"] = [
3118
(s.decode("utf-8")
3119
if isinstance(s, bytes)
3120
else s) for s in
3121
value["client_structure"]]
3122
# .name & .host
3123
for k in ("name", "host"):
3124
if isinstance(value[k], bytes):
3125
value[k] = value[k].decode("utf-8")
3126
# old_client_settings
3127
# .keys()
3128
old_client_settings = {
3129
(key.decode("utf-8")
3130
if isinstance(key, bytes)
3131
else key): value
3132
for key, value in
3133
bytes_old_client_settings.items()}
3134
del bytes_old_client_settings
3135
# .host
3136
for value in old_client_settings.values():
3137
if isinstance(value["host"], bytes):
3138
value["host"] = (value["host"]
3139
.decode("utf-8"))
3140
os.remove(stored_state_path)
3141
except IOError as e:
3142
if e.errno == errno.ENOENT:
3143
logger.warning("Could not load persistent state:"
3144
" {}".format(os.strerror(e.errno)))
3145
else:
3146
logger.critical("Could not load persistent state:",
3147
exc_info=e)
3148
raise
3149
except EOFError as e:
3150
logger.warning("Could not load persistent state: "
3151
"EOFError:",
3152
exc_info=e)
3153
3154
with PGPEngine() as pgp:
3155
for client_name, client in clients_data.items():
3156
# Skip removed clients
3157
if client_name not in client_settings:
3158
continue
3159
3160
# Decide which value to use after restoring saved state.
3161
# We have three different values: Old config file,
3162
# new config file, and saved state.
3163
# New config value takes precedence if it differs from old
3164
# config value, otherwise use saved state.
3165
for name, value in client_settings[client_name].items():
3166
try:
3167
# For each value in new config, check if it
3168
# differs from the old config value (Except for
3169
# the "secret" attribute)
3170
if (name != "secret"
3171
and (value !=
3172
old_client_settings[client_name][name])):
3173
client[name] = value
3174
except KeyError:
3175
pass
3176
3177
# Clients who has passed its expire date can still be
3178
# enabled if its last checker was successful. A Client
3179
# whose checker succeeded before we stored its state is
3180
# assumed to have successfully run all checkers during
3181
# downtime.
3182
if client["enabled"]:
3183
if datetime.datetime.utcnow() >= client["expires"]:
3184
if not client["last_checked_ok"]:
3185
logger.warning(
3186
"disabling client {} - Client never "
3187
"performed a successful checker".format(
3188
client_name))
3189
client["enabled"] = False
3190
elif client["last_checker_status"] != 0:
3191
logger.warning(
3192
"disabling client {} - Client last"
3193
" checker failed with error code"
3194
" {}".format(
3195
client_name,
3196
client["last_checker_status"]))
3197
client["enabled"] = False
3198
else:
3199
client["expires"] = (
3200
datetime.datetime.utcnow()
3201
+ client["timeout"])
3202
logger.debug("Last checker succeeded,"
3203
" keeping {} enabled".format(
3204
client_name))
1904
client_class = functools.partial(ClientDBus, bus = bus)
1905
def client_config_items(config, section):
1906
special_settings = {
1907
"approved_by_default":
1908
lambda: config.getboolean(section,
1909
"approved_by_default"),
1910
}
1911
for name, value in config.items(section):
3205
1912
try:
3206
client["secret"] = pgp.decrypt(
3207
client["encrypted_secret"],
3208
client_settings[client_name]["secret"])
3209
except PGPError:
3210
# If decryption fails, we use secret from new settings
3211
logger.debug("Failed to decrypt {} old secret".format(
3212
client_name))
3213
client["secret"] = (client_settings[client_name]
3214
["secret"])
3215
3216
# Add/remove clients based on new changes made to config
3217
for client_name in (set(old_client_settings)
3218
- set(client_settings)):
3219
del clients_data[client_name]
3220
for client_name in (set(client_settings)
3221
- set(old_client_settings)):
3222
clients_data[client_name] = client_settings[client_name]
3223
3224
# Create all client objects
3225
for client_name, client in clients_data.items():
3226
tcp_server.clients[client_name] = client_class(
3227
name=client_name,
3228
settings=client,
3229
server_settings=server_settings)
3230
1913
yield (name, special_settings[name]())
1914
except KeyError:
1915
yield (name, value)
1916
1917
tcp_server.clients.update(set(
1918
client_class(name = section,
1919
config= dict(client_config_items(
1920
client_config, section)))
1921
for section in client_config.sections()))
3231
1922
if not tcp_server.clients:
3232
1923
logger.warning("No clients defined")
3233
3234
if not foreground:
3235
if pidfile is not None:
3236
pid = os.getpid()
3237
try:
3238
with pidfile:
3239
print(pid, file=pidfile)
3240
except IOError:
3241
logger.error("Could not write to file %r with PID %d",
3242
pidfilename, pid)
3243
del pidfile
1924
1925
if not debug:
1926
try:
1927
with pidfile:
1928
pid = os.getpid()
1929
pidfile.write(str(pid) + "\n".encode("utf-8"))
1930
del pidfile
1931
except IOError:
1932
logger.error("Could not write to file %r with PID %d",
1933
pidfilename, pid)
1934
except NameError:
1935
# "pidfile" was never created
1936
pass
3244
1937
del pidfilename
3245
3246
for termsig in (signal.SIGHUP, signal.SIGTERM):
3247
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3248
lambda: main_loop.quit() and False)
3249
1938
1939
signal.signal(signal.SIGINT, signal.SIG_IGN)
1940
1941
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1942
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1943
3250
1944
if use_dbus:
3251
3252
@alternate_dbus_interfaces(
3253
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3254
class MandosDBusService(DBusObjectWithObjectManager):
1945
class MandosDBusService(dbus.service.Object):
3255
1946
"""A D-Bus proxy object"""
3256
3257
1947
def __init__(self):
3258
1948
dbus.service.Object.__init__(self, bus, "/")
3259
3260
_interface = "se.recompile.Mandos"
3261
1949
_interface = "se.bsnet.fukt.Mandos"
1950
3262
1951
@dbus.service.signal(_interface, signature="o")
3263
1952
def ClientAdded(self, objpath):
3264
1953
"D-Bus signal"
3265
1954
pass
3266
1955
3267
1956
@dbus.service.signal(_interface, signature="ss")
3268
1957
def ClientNotFound(self, fingerprint, address):
3269
1958
"D-Bus signal"
3270
1959
pass
3271
3272
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3273
"true"})
1960
3274
1961
@dbus.service.signal(_interface, signature="os")
3275
1962
def ClientRemoved(self, objpath, name):
3276
1963
"D-Bus signal"
3277
1964
pass
3278
3279
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3280
"true"})
1965
3281
1966
@dbus.service.method(_interface, out_signature="ao")
3282
1967
def GetAllClients(self):
3283
1968
"D-Bus method"
3284
return dbus.Array(c.dbus_object_path for c in
3285
tcp_server.clients.values())
3286
3287
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3288
"true"})
1969
return dbus.Array(c.dbus_object_path
1970
for c in tcp_server.clients)
1971
3289
1972
@dbus.service.method(_interface,
3290
1973
out_signature="a{oa{sv}}")
3291
1974
def GetAllClientsWithProperties(self):
3292
1975
"D-Bus method"
3293
1976
return dbus.Dictionary(
3294
{c.dbus_object_path: c.GetAll(
3295
"se.recompile.Mandos.Client")
3296
for c in tcp_server.clients.values()},
1977
((c.dbus_object_path, c.GetAll(""))
1978
for c in tcp_server.clients),
3297
1979
signature="oa{sv}")
3298
1980
3299
1981
@dbus.service.method(_interface, in_signature="o")
3300
1982
def RemoveClient(self, object_path):
3301
1983
"D-Bus method"
3302
for c in tcp_server.clients.values():
1984
for c in tcp_server.clients:
3303
1985
if c.dbus_object_path == object_path:
3304
del tcp_server.clients[c.name]
1986
tcp_server.clients.remove(c)
3305
1987
c.remove_from_connection()
3306
# Don't signal the disabling
1988
# Don't signal anything except ClientRemoved
3307
1989
c.disable(quiet=True)
3308
# Emit D-Bus signal for removal
3309
self.client_removed_signal(c)
1990
# Emit D-Bus signal
1991
self.ClientRemoved(object_path, c.name)
3310
1992
return
3311
1993
raise KeyError(object_path)
3312
1994
3313
1995
del _interface
3314
3315
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3316
out_signature="a{oa{sa{sv}}}")
3317
def GetManagedObjects(self):
3318
"""D-Bus method"""
3319
return dbus.Dictionary(
3320
{client.dbus_object_path:
3321
dbus.Dictionary(
3322
{interface: client.GetAll(interface)
3323
for interface in
3324
client._get_all_interface_names()})
3325
for client in tcp_server.clients.values()})
3326
3327
def client_added_signal(self, client):
3328
"""Send the new standard signal and the old signal"""
3329
if use_dbus:
3330
# New standard signal
3331
self.InterfacesAdded(
3332
client.dbus_object_path,
3333
dbus.Dictionary(
3334
{interface: client.GetAll(interface)
3335
for interface in
3336
client._get_all_interface_names()}))
3337
# Old signal
3338
self.ClientAdded(client.dbus_object_path)
3339
3340
def client_removed_signal(self, client):
3341
"""Send the new standard signal and the old signal"""
3342
if use_dbus:
3343
# New standard signal
3344
self.InterfacesRemoved(
3345
client.dbus_object_path,
3346
client._get_all_interface_names())
3347
# Old signal
3348
self.ClientRemoved(client.dbus_object_path,
3349
client.name)
3350
1996
3351
1997
mandos_dbus_service = MandosDBusService()
3352
3353
# Save modules to variables to exempt the modules from being
3354
# unloaded before the function registered with atexit() is run.
3355
mp = multiprocessing
3356
wn = wnull
3357
1998
3358
1999
def cleanup():
3359
2000
"Cleanup function; run on exit"
3360
if zeroconf:
3361
service.cleanup()
3362
3363
mp.active_children()
3364
wn.close()
3365
if not (tcp_server.clients or client_settings):
3366
return
3367
3368
# Store client before exiting. Secrets are encrypted with key
3369
# based on what config file has. If config file is
3370
# removed/edited, old secret will thus be unrecovable.
3371
clients = {}
3372
with PGPEngine() as pgp:
3373
for client in tcp_server.clients.values():
3374
key = client_settings[client.name]["secret"]
3375
client.encrypted_secret = pgp.encrypt(client.secret,
3376
key)
3377
client_dict = {}
3378
3379
# A list of attributes that can not be pickled
3380
# + secret.
3381
exclude = {"bus", "changedstate", "secret",
3382
"checker", "server_settings"}
3383
for name, typ in inspect.getmembers(dbus.service
3384
.Object):
3385
exclude.add(name)
3386
3387
client_dict["encrypted_secret"] = (client
3388
.encrypted_secret)
3389
for attr in client.client_structure:
3390
if attr not in exclude:
3391
client_dict[attr] = getattr(client, attr)
3392
3393
clients[client.name] = client_dict
3394
del client_settings[client.name]["secret"]
3395
3396
try:
3397
with tempfile.NamedTemporaryFile(
3398
mode='wb',
3399
suffix=".pickle",
3400
prefix='clients-',
3401
dir=os.path.dirname(stored_state_path),
3402
delete=False) as stored_state:
3403
pickle.dump((clients, client_settings), stored_state,
3404
protocol=2)
3405
tempname = stored_state.name
3406
os.rename(tempname, stored_state_path)
3407
except (IOError, OSError) as e:
3408
if not debug:
3409
try:
3410
os.remove(tempname)
3411
except NameError:
3412
pass
3413
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
3414
logger.warning("Could not save persistent state: {}"
3415
.format(os.strerror(e.errno)))
3416
else:
3417
logger.warning("Could not save persistent state:",
3418
exc_info=e)
3419
raise
3420
3421
# Delete all clients, and settings from config
2001
service.cleanup()
2002
3422
2003
while tcp_server.clients:
3423
name, client = tcp_server.clients.popitem()
2004
client = tcp_server.clients.pop()
3424
2005
if use_dbus:
3425
2006
client.remove_from_connection()
3426
# Don't signal the disabling
2007
client.disable_hook = None
2008
# Don't signal anything except ClientRemoved
3427
2009
client.disable(quiet=True)
3428
# Emit D-Bus signal for removal
3429
2010
if use_dbus:
3430
mandos_dbus_service.client_removed_signal(client)
3431
client_settings.clear()
3432
2011
# Emit D-Bus signal
2012
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
2013
client.name)
2014
3433
2015
atexit.register(cleanup)
3434
3435
for client in tcp_server.clients.values():
2016
2017
for client in tcp_server.clients:
3436
2018
if use_dbus:
3437
# Emit D-Bus signal for adding
3438
mandos_dbus_service.client_added_signal(client)
3439
# Need to initiate checking of clients
3440
if client.enabled:
3441
client.init_checker()
3442
2019
# Emit D-Bus signal
2020
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2021
client.enable()
2022
3443
2023
tcp_server.enable()
3444
2024
tcp_server.server_activate()
3445
2025
3446
2026
# Find out what port we got
3447
if zeroconf:
3448
service.port = tcp_server.socket.getsockname()[1]
2027
service.port = tcp_server.socket.getsockname()[1]
3449
2028
if use_ipv6:
3450
2029
logger.info("Now listening on address %r, port %d,"
3451
" flowinfo %d, scope_id %d",
3452
*tcp_server.socket.getsockname())
2030
" flowinfo %d, scope_id %d"
2031
% tcp_server.socket.getsockname())
3453
2032
else: # IPv4
3454
logger.info("Now listening on address %r, port %d",
3455
*tcp_server.socket.getsockname())
3456
3457
# service.interface = tcp_server.socket.getsockname()[3]
3458
2033
logger.info("Now listening on address %r, port %d"
2034
% tcp_server.socket.getsockname())
2035
2036
#service.interface = tcp_server.socket.getsockname()[3]
2037
3459
2038
try:
3460
if zeroconf:
3461
# From the Avahi example code
3462
try:
3463
service.activate()
3464
except dbus.exceptions.DBusException as error:
3465
logger.critical("D-Bus Exception", exc_info=error)
3466
cleanup()
3467
sys.exit(1)
3468
# End of Avahi example code
3469
3470
GLib.io_add_watch(tcp_server.fileno(), GLib.IO_IN,
3471
lambda *args, **kwargs:
3472
(tcp_server.handle_request
3473
(*args[2:], **kwargs) or True))
3474
2039
# From the Avahi example code
2040
try:
2041
service.activate()
2042
except dbus.exceptions.DBusException as error:
2043
logger.critical("DBusException: %s", error)
2044
cleanup()
2045
sys.exit(1)
2046
# End of Avahi example code
2047
2048
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2049
lambda *args, **kwargs:
2050
(tcp_server.handle_request
2051
(*args[2:], **kwargs) or True))
2052
3475
2053
logger.debug("Starting main loop")
3476
2054
main_loop.run()
3477
2055
except AvahiError as error:
3478
logger.critical("Avahi Error", exc_info=error)
2056
logger.critical("AvahiError: %s", error)
3479
2057
cleanup()
3480
2058
sys.exit(1)
3481
2059
except KeyboardInterrupt:
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0