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- Committer: Björn Påhlsson
- Date: 2011-07-25 18:47:45 UTC
- mto: (237.7.37 trunk)
- mto: This revision was merged to the branch mainline in revision 284.
- Revision ID: belorn@fukt.bsnet.se-20110725184745-leavsoyu1hll3mdp
free dirents in password-prompt
- 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
8
8
# <http://avahi.org/wiki/PythonPublishExample>. This includes the
9
9
# methods "add", "remove", "server_state_changed",
10
10
# "entry_group_state_changed", "cleanup", and "activate" in the
11
11
# "AvahiService" class, and some lines in "main".
12
#
12
#
13
13
# Everything else is
14
# Copyright © 2008-2016 Teddy Hogeborn
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# Copyright © 2008-2016 Björn Påhlsson
16
#
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# Copyright © 2008-2011 Teddy Hogeborn
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# Copyright © 2008-2011 Björn Påhlsson
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#
17
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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
#
31
# 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
56
51
import os
65
60
import struct
66
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 = "1.3.0"
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 "self" here, since this method is called before
519
# the assignment to the "gnutls" global variable happens.
520
if self.check_version(self._need_version) is None:
521
raise self.Error("Needs GnuTLS {} or later"
522
.format(self._need_version))
523
524
# Unless otherwise indicated, the constants and types below are
525
# all from the gnutls/gnutls.h C header file.
526
527
# Constants
528
E_SUCCESS = 0
529
E_INTERRUPTED = -52
530
E_AGAIN = -28
531
CRT_OPENPGP = 2
532
CLIENT = 2
533
SHUT_RDWR = 0
534
CRD_CERTIFICATE = 1
535
E_NO_CERTIFICATE_FOUND = -49
536
OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
537
538
# Types
539
class session_int(ctypes.Structure):
540
_fields_ = []
541
session_t = ctypes.POINTER(session_int)
542
543
class certificate_credentials_st(ctypes.Structure):
544
_fields_ = []
545
certificate_credentials_t = ctypes.POINTER(
546
certificate_credentials_st)
547
certificate_type_t = ctypes.c_int
548
549
class datum_t(ctypes.Structure):
550
_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
551
('size', ctypes.c_uint)]
552
553
class openpgp_crt_int(ctypes.Structure):
554
_fields_ = []
555
openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
556
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
557
log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
558
credentials_type_t = ctypes.c_int
559
transport_ptr_t = ctypes.c_void_p
560
close_request_t = ctypes.c_int
561
562
# Exceptions
563
class Error(Exception):
564
# We need to use the class name "GnuTLS" here, since this
565
# exception might be raised from within GnuTLS.__init__,
566
# which is called before the assignment to the "gnutls"
567
# global variable has happened.
568
def __init__(self, message=None, code=None, args=()):
569
# Default usage is by a message string, but if a return
570
# code is passed, convert it to a string with
571
# gnutls.strerror()
572
self.code = code
573
if message is None and code is not None:
574
message = GnuTLS.strerror(code)
575
return super(GnuTLS.Error, self).__init__(
576
message, *args)
577
578
class CertificateSecurityError(Error):
579
pass
580
581
# Classes
582
class Credentials(object):
583
def __init__(self):
584
self._c_object = gnutls.certificate_credentials_t()
585
gnutls.certificate_allocate_credentials(
586
ctypes.byref(self._c_object))
587
self.type = gnutls.CRD_CERTIFICATE
588
589
def __del__(self):
590
gnutls.certificate_free_credentials(self._c_object)
591
592
class ClientSession(object):
593
def __init__(self, socket, credentials=None):
594
self._c_object = gnutls.session_t()
595
gnutls.init(ctypes.byref(self._c_object), gnutls.CLIENT)
596
gnutls.set_default_priority(self._c_object)
597
gnutls.transport_set_ptr(self._c_object, socket.fileno())
598
gnutls.handshake_set_private_extensions(self._c_object,
599
True)
600
self.socket = socket
601
if credentials is None:
602
credentials = gnutls.Credentials()
603
gnutls.credentials_set(self._c_object, credentials.type,
604
ctypes.cast(credentials._c_object,
605
ctypes.c_void_p))
606
self.credentials = credentials
607
608
def __del__(self):
609
gnutls.deinit(self._c_object)
610
611
def handshake(self):
612
return gnutls.handshake(self._c_object)
613
614
def send(self, data):
615
data = bytes(data)
616
data_len = len(data)
617
while data_len > 0:
618
data_len -= gnutls.record_send(self._c_object,
619
data[-data_len:],
620
data_len)
621
622
def bye(self):
623
return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
624
625
# Error handling functions
626
def _error_code(result):
627
"""A function to raise exceptions on errors, suitable
628
for the 'restype' attribute on ctypes functions"""
629
if result >= 0:
630
return result
631
if result == gnutls.E_NO_CERTIFICATE_FOUND:
632
raise gnutls.CertificateSecurityError(code=result)
633
raise gnutls.Error(code=result)
634
635
def _retry_on_error(result, func, arguments):
636
"""A function to retry on some errors, suitable
637
for the 'errcheck' attribute on ctypes functions"""
638
while result < 0:
639
if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
640
return _error_code(result)
641
result = func(*arguments)
642
return result
643
644
# Unless otherwise indicated, the function declarations below are
645
# all from the gnutls/gnutls.h C header file.
646
647
# Functions
648
priority_set_direct = _library.gnutls_priority_set_direct
649
priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
650
ctypes.POINTER(ctypes.c_char_p)]
651
priority_set_direct.restype = _error_code
652
653
init = _library.gnutls_init
654
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
655
init.restype = _error_code
656
657
set_default_priority = _library.gnutls_set_default_priority
658
set_default_priority.argtypes = [session_t]
659
set_default_priority.restype = _error_code
660
661
record_send = _library.gnutls_record_send
662
record_send.argtypes = [session_t, ctypes.c_void_p,
663
ctypes.c_size_t]
664
record_send.restype = ctypes.c_ssize_t
665
record_send.errcheck = _retry_on_error
666
667
certificate_allocate_credentials = (
668
_library.gnutls_certificate_allocate_credentials)
669
certificate_allocate_credentials.argtypes = [
670
ctypes.POINTER(certificate_credentials_t)]
671
certificate_allocate_credentials.restype = _error_code
672
673
certificate_free_credentials = (
674
_library.gnutls_certificate_free_credentials)
675
certificate_free_credentials.argtypes = [
676
certificate_credentials_t]
677
certificate_free_credentials.restype = None
678
679
handshake_set_private_extensions = (
680
_library.gnutls_handshake_set_private_extensions)
681
handshake_set_private_extensions.argtypes = [session_t,
682
ctypes.c_int]
683
handshake_set_private_extensions.restype = None
684
685
credentials_set = _library.gnutls_credentials_set
686
credentials_set.argtypes = [session_t, credentials_type_t,
687
ctypes.c_void_p]
688
credentials_set.restype = _error_code
689
690
strerror = _library.gnutls_strerror
691
strerror.argtypes = [ctypes.c_int]
692
strerror.restype = ctypes.c_char_p
693
694
certificate_type_get = _library.gnutls_certificate_type_get
695
certificate_type_get.argtypes = [session_t]
696
certificate_type_get.restype = _error_code
697
698
certificate_get_peers = _library.gnutls_certificate_get_peers
699
certificate_get_peers.argtypes = [session_t,
700
ctypes.POINTER(ctypes.c_uint)]
701
certificate_get_peers.restype = ctypes.POINTER(datum_t)
702
703
global_set_log_level = _library.gnutls_global_set_log_level
704
global_set_log_level.argtypes = [ctypes.c_int]
705
global_set_log_level.restype = None
706
707
global_set_log_function = _library.gnutls_global_set_log_function
708
global_set_log_function.argtypes = [log_func]
709
global_set_log_function.restype = None
710
711
deinit = _library.gnutls_deinit
712
deinit.argtypes = [session_t]
713
deinit.restype = None
714
715
handshake = _library.gnutls_handshake
716
handshake.argtypes = [session_t]
717
handshake.restype = _error_code
718
handshake.errcheck = _retry_on_error
719
720
transport_set_ptr = _library.gnutls_transport_set_ptr
721
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
722
transport_set_ptr.restype = None
723
724
bye = _library.gnutls_bye
725
bye.argtypes = [session_t, close_request_t]
726
bye.restype = _error_code
727
bye.errcheck = _retry_on_error
728
729
check_version = _library.gnutls_check_version
730
check_version.argtypes = [ctypes.c_char_p]
731
check_version.restype = ctypes.c_char_p
732
733
# All the function declarations below are from gnutls/openpgp.h
734
735
openpgp_crt_init = _library.gnutls_openpgp_crt_init
736
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
737
openpgp_crt_init.restype = _error_code
738
739
openpgp_crt_import = _library.gnutls_openpgp_crt_import
740
openpgp_crt_import.argtypes = [openpgp_crt_t,
741
ctypes.POINTER(datum_t),
742
openpgp_crt_fmt_t]
743
openpgp_crt_import.restype = _error_code
744
745
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
746
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
747
ctypes.POINTER(ctypes.c_uint)]
748
openpgp_crt_verify_self.restype = _error_code
749
750
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
751
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
752
openpgp_crt_deinit.restype = None
753
754
openpgp_crt_get_fingerprint = (
755
_library.gnutls_openpgp_crt_get_fingerprint)
756
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
757
ctypes.c_void_p,
758
ctypes.POINTER(
759
ctypes.c_size_t)]
760
openpgp_crt_get_fingerprint.restype = _error_code
761
762
# Remove non-public functions
763
del _error_code, _retry_on_error
764
# Create the global "gnutls" object, simulating a module
765
gnutls = GnuTLS()
766
767
768
def call_pipe(connection, # : multiprocessing.Connection
769
func, *args, **kwargs):
770
"""This function is meant to be called by multiprocessing.Process
771
772
This function runs func(*args, **kwargs), and writes the resulting
773
return value on the provided multiprocessing.Connection.
774
"""
775
connection.send(func(*args, **kwargs))
776
connection.close()
777
778
779
267
class Client(object):
780
268
"""A representation of a client host served by this server.
781
269
782
270
Attributes:
783
approved: bool(); 'None' if not yet approved/disapproved
271
_approved: bool(); 'None' if not yet approved/disapproved
784
272
approval_delay: datetime.timedelta(); Time to wait for approval
785
273
approval_duration: datetime.timedelta(); Duration of one approval
786
274
checker: subprocess.Popen(); a running checker process used
787
275
to see if the client lives.
788
276
'None' if no process is running.
789
checker_callback_tag: a GLib event source tag, or None
277
checker_callback_tag: a gobject event source tag, or None
790
278
checker_command: string; External command which is run to check
791
279
if client lives. %() expansions are done at
792
280
runtime with vars(self) as dict, so that for
793
281
instance %(name)s can be used in the command.
794
checker_initiator_tag: a GLib event source tag, or None
282
checker_initiator_tag: a gobject event source tag, or None
795
283
created: datetime.datetime(); (UTC) object creation
796
client_structure: Object describing what attributes a client has
797
and is used for storing the client at exit
798
284
current_checker_command: string; current running checker_command
799
disable_initiator_tag: a GLib event source tag, or None
285
disable_hook: If set, called by disable() as disable_hook(self)
286
disable_initiator_tag: a gobject event source tag, or None
800
287
enabled: bool()
801
288
fingerprint: string (40 or 32 hexadecimal digits); used to
802
289
uniquely identify the client
804
291
interval: datetime.timedelta(); How often to start a new checker
805
292
last_approval_request: datetime.datetime(); (UTC) or None
806
293
last_checked_ok: datetime.datetime(); (UTC) or None
807
last_checker_status: integer between 0 and 255 reflecting exit
808
status of last checker. -1 reflects crashed
809
checker, -2 means no checker completed yet.
810
last_checker_signal: The signal which killed the last checker, if
811
last_checker_status is -1
812
last_enabled: datetime.datetime(); (UTC) or None
294
last_enabled: datetime.datetime(); (UTC)
813
295
name: string; from the config file, used in log messages and
814
296
D-Bus identifiers
815
297
secret: bytestring; sent verbatim (over TLS) to client
816
298
timeout: datetime.timedelta(); How long from last_checked_ok
817
299
until this client is disabled
818
extended_timeout: extra long timeout when secret has been sent
819
300
runtime_expansions: Allowed attributes for runtime expansion.
820
expires: datetime.datetime(); time (UTC) when a client will be
821
disabled, or None
822
server_settings: The server_settings dict from main()
823
301
"""
824
302
825
303
runtime_expansions = ("approval_delay", "approval_duration",
826
"created", "enabled", "expires",
827
"fingerprint", "host", "interval",
828
"last_approval_request", "last_checked_ok",
304
"created", "enabled", "fingerprint",
305
"host", "interval", "last_checked_ok",
829
306
"last_enabled", "name", "timeout")
830
client_defaults = {
831
"timeout": "PT5M",
832
"extended_timeout": "PT15M",
833
"interval": "PT2M",
834
"checker": "fping -q -- %%(host)s",
835
"host": "",
836
"approval_delay": "PT0S",
837
"approval_duration": "PT1S",
838
"approved_by_default": "True",
839
"enabled": "True",
840
}
841
307
842
308
@staticmethod
843
def config_parser(config):
844
"""Construct a new dict of client settings of this form:
845
{ client_name: {setting_name: value, ...}, ...}
846
with exceptions for any special settings as defined above.
847
NOTE: Must be a pure function. Must return the same result
848
value given the same arguments.
849
"""
850
settings = {}
851
for client_name in config.sections():
852
section = dict(config.items(client_name))
853
client = settings[client_name] = {}
854
855
client["host"] = section["host"]
856
# Reformat values from string types to Python types
857
client["approved_by_default"] = config.getboolean(
858
client_name, "approved_by_default")
859
client["enabled"] = config.getboolean(client_name,
860
"enabled")
861
862
# Uppercase and remove spaces from fingerprint for later
863
# comparison purposes with return value from the
864
# fingerprint() function
865
client["fingerprint"] = (section["fingerprint"].upper()
866
.replace(" ", ""))
867
if "secret" in section:
868
client["secret"] = codecs.decode(section["secret"]
869
.encode("utf-8"),
870
"base64")
871
elif "secfile" in section:
872
with open(os.path.expanduser(os.path.expandvars
873
(section["secfile"])),
874
"rb") as secfile:
875
client["secret"] = secfile.read()
876
else:
877
raise TypeError("No secret or secfile for section {}"
878
.format(section))
879
client["timeout"] = string_to_delta(section["timeout"])
880
client["extended_timeout"] = string_to_delta(
881
section["extended_timeout"])
882
client["interval"] = string_to_delta(section["interval"])
883
client["approval_delay"] = string_to_delta(
884
section["approval_delay"])
885
client["approval_duration"] = string_to_delta(
886
section["approval_duration"])
887
client["checker_command"] = section["checker"]
888
client["last_approval_request"] = None
889
client["last_checked_ok"] = None
890
client["last_checker_status"] = -2
891
892
return settings
893
894
def __init__(self, settings, name=None, server_settings=None):
309
def _timedelta_to_milliseconds(td):
310
"Convert a datetime.timedelta() to milliseconds"
311
return ((td.days * 24 * 60 * 60 * 1000)
312
+ (td.seconds * 1000)
313
+ (td.microseconds // 1000))
314
315
def timeout_milliseconds(self):
316
"Return the 'timeout' attribute in milliseconds"
317
return self._timedelta_to_milliseconds(self.timeout)
318
319
def interval_milliseconds(self):
320
"Return the 'interval' attribute in milliseconds"
321
return self._timedelta_to_milliseconds(self.interval)
322
323
def approval_delay_milliseconds(self):
324
return self._timedelta_to_milliseconds(self.approval_delay)
325
326
def __init__(self, name = None, disable_hook=None, config=None):
327
"""Note: the 'checker' key in 'config' sets the
328
'checker_command' attribute and *not* the 'checker'
329
attribute."""
895
330
self.name = name
896
if server_settings is None:
897
server_settings = {}
898
self.server_settings = server_settings
899
# adding all client settings
900
for setting, value in settings.items():
901
setattr(self, setting, value)
902
903
if self.enabled:
904
if not hasattr(self, "last_enabled"):
905
self.last_enabled = datetime.datetime.utcnow()
906
if not hasattr(self, "expires"):
907
self.expires = (datetime.datetime.utcnow()
908
+ self.timeout)
909
else:
910
self.last_enabled = None
911
self.expires = None
912
331
if config is None:
332
config = {}
913
333
logger.debug("Creating client %r", self.name)
334
# Uppercase and remove spaces from fingerprint for later
335
# comparison purposes with return value from the fingerprint()
336
# function
337
self.fingerprint = (config["fingerprint"].upper()
338
.replace(" ", ""))
914
339
logger.debug(" Fingerprint: %s", self.fingerprint)
915
self.created = settings.get("created",
916
datetime.datetime.utcnow())
917
918
# attributes specific for this server instance
340
if "secret" in config:
341
self.secret = config["secret"].decode("base64")
342
elif "secfile" in config:
343
with open(os.path.expanduser(os.path.expandvars
344
(config["secfile"])),
345
"rb") as secfile:
346
self.secret = secfile.read()
347
else:
348
raise TypeError("No secret or secfile for client %s"
349
% self.name)
350
self.host = config.get("host", "")
351
self.created = datetime.datetime.utcnow()
352
self.enabled = False
353
self.last_approval_request = None
354
self.last_enabled = None
355
self.last_checked_ok = None
356
self.timeout = string_to_delta(config["timeout"])
357
self.interval = string_to_delta(config["interval"])
358
self.disable_hook = disable_hook
919
359
self.checker = None
920
360
self.checker_initiator_tag = None
921
361
self.disable_initiator_tag = None
922
362
self.checker_callback_tag = None
363
self.checker_command = config["checker"]
923
364
self.current_checker_command = None
924
self.approved = None
365
self.last_connect = None
366
self._approved = None
367
self.approved_by_default = config.get("approved_by_default",
368
True)
925
369
self.approvals_pending = 0
926
self.changedstate = multiprocessing_manager.Condition(
927
multiprocessing_manager.Lock())
928
self.client_structure = [attr
929
for attr in self.__dict__.keys()
930
if not attr.startswith("_")]
931
self.client_structure.append("client_structure")
932
933
for name, t in inspect.getmembers(
934
type(self), lambda obj: isinstance(obj, property)):
935
if not name.startswith("_"):
936
self.client_structure.append(name)
937
938
# Send notice to process children that client state has changed
370
self.approval_delay = string_to_delta(
371
config["approval_delay"])
372
self.approval_duration = string_to_delta(
373
config["approval_duration"])
374
self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())
375
939
376
def send_changedstate(self):
940
with self.changedstate:
941
self.changedstate.notify_all()
942
377
self.changedstate.acquire()
378
self.changedstate.notify_all()
379
self.changedstate.release()
380
943
381
def enable(self):
944
382
"""Start this client's checker and timeout hooks"""
945
383
if getattr(self, "enabled", False):
946
384
# Already enabled
947
385
return
948
self.expires = datetime.datetime.utcnow() + self.timeout
949
self.enabled = True
386
self.send_changedstate()
950
387
self.last_enabled = datetime.datetime.utcnow()
951
self.init_checker()
952
self.send_changedstate()
953
388
# Schedule a new checker to be started an 'interval' from now,
389
# and every interval from then on.
390
self.checker_initiator_tag = (gobject.timeout_add
391
(self.interval_milliseconds(),
392
self.start_checker))
393
# Schedule a disable() when 'timeout' has passed
394
self.disable_initiator_tag = (gobject.timeout_add
395
(self.timeout_milliseconds(),
396
self.disable))
397
self.enabled = True
398
# Also start a new checker *right now*.
399
self.start_checker()
400
954
401
def disable(self, quiet=True):
955
402
"""Disable this client."""
956
403
if not getattr(self, "enabled", False):
957
404
return False
958
405
if not quiet:
406
self.send_changedstate()
407
if not quiet:
959
408
logger.info("Disabling client %s", self.name)
960
if getattr(self, "disable_initiator_tag", None) is not None:
961
GLib.source_remove(self.disable_initiator_tag)
409
if getattr(self, "disable_initiator_tag", False):
410
gobject.source_remove(self.disable_initiator_tag)
962
411
self.disable_initiator_tag = None
963
self.expires = None
964
if getattr(self, "checker_initiator_tag", None) is not None:
965
GLib.source_remove(self.checker_initiator_tag)
412
if getattr(self, "checker_initiator_tag", False):
413
gobject.source_remove(self.checker_initiator_tag)
966
414
self.checker_initiator_tag = None
967
415
self.stop_checker()
416
if self.disable_hook:
417
self.disable_hook(self)
968
418
self.enabled = False
969
if not quiet:
970
self.send_changedstate()
971
# Do not run this again if called by a GLib.timeout_add
419
# Do not run this again if called by a gobject.timeout_add
972
420
return False
973
421
974
422
def __del__(self):
423
self.disable_hook = None
975
424
self.disable()
976
977
def init_checker(self):
978
# Schedule a new checker to be started an 'interval' from now,
979
# and every interval from then on.
980
if self.checker_initiator_tag is not None:
981
GLib.source_remove(self.checker_initiator_tag)
982
self.checker_initiator_tag = GLib.timeout_add(
983
int(self.interval.total_seconds() * 1000),
984
self.start_checker)
985
# Schedule a disable() when 'timeout' has passed
986
if self.disable_initiator_tag is not None:
987
GLib.source_remove(self.disable_initiator_tag)
988
self.disable_initiator_tag = GLib.timeout_add(
989
int(self.timeout.total_seconds() * 1000), self.disable)
990
# Also start a new checker *right now*.
991
self.start_checker()
992
993
def checker_callback(self, source, condition, connection,
994
command):
425
426
def checker_callback(self, pid, condition, command):
995
427
"""The checker has completed, so take appropriate actions."""
996
428
self.checker_callback_tag = None
997
429
self.checker = None
998
# Read return code from connection (see call_pipe)
999
returncode = connection.recv()
1000
connection.close()
1001
1002
if returncode >= 0:
1003
self.last_checker_status = returncode
1004
self.last_checker_signal = None
1005
if self.last_checker_status == 0:
430
if os.WIFEXITED(condition):
431
exitstatus = os.WEXITSTATUS(condition)
432
if exitstatus == 0:
1006
433
logger.info("Checker for %(name)s succeeded",
1007
434
vars(self))
1008
435
self.checked_ok()
1009
436
else:
1010
logger.info("Checker for %(name)s failed", vars(self))
437
logger.info("Checker for %(name)s failed",
438
vars(self))
1011
439
else:
1012
self.last_checker_status = -1
1013
self.last_checker_signal = -returncode
1014
440
logger.warning("Checker for %(name)s crashed?",
1015
441
vars(self))
1016
return False
1017
442
1018
443
def checked_ok(self):
1019
"""Assert that the client has been seen, alive and well."""
444
"""Bump up the timeout for this client.
445
446
This should only be called when the client has been seen,
447
alive and well.
448
"""
1020
449
self.last_checked_ok = datetime.datetime.utcnow()
1021
self.last_checker_status = 0
1022
self.last_checker_signal = None
1023
self.bump_timeout()
1024
1025
def bump_timeout(self, timeout=None):
1026
"""Bump up the timeout for this client."""
1027
if timeout is None:
1028
timeout = self.timeout
1029
if self.disable_initiator_tag is not None:
1030
GLib.source_remove(self.disable_initiator_tag)
1031
self.disable_initiator_tag = None
1032
if getattr(self, "enabled", False):
1033
self.disable_initiator_tag = GLib.timeout_add(
1034
int(timeout.total_seconds() * 1000), self.disable)
1035
self.expires = datetime.datetime.utcnow() + timeout
1036
450
gobject.source_remove(self.disable_initiator_tag)
451
self.disable_initiator_tag = (gobject.timeout_add
452
(self.timeout_milliseconds(),
453
self.disable))
454
1037
455
def need_approval(self):
1038
456
self.last_approval_request = datetime.datetime.utcnow()
1039
457
1040
458
def start_checker(self):
1041
459
"""Start a new checker subprocess if one is not running.
1042
460
1043
461
If a checker already exists, leave it running and do
1044
462
nothing."""
1045
463
# The reason for not killing a running checker is that if we
1046
# did that, and if a checker (for some reason) started running
1047
# slowly and taking more than 'interval' time, then the client
1048
# would inevitably timeout, since no checker would get a
1049
# chance to run to completion. If we instead leave running
464
# did that, then if a checker (for some reason) started
465
# running slowly and taking more than 'interval' time, the
466
# client would inevitably timeout, since no checker would get
467
# a chance to run to completion. If we instead leave running
1050
468
# checkers alone, the checker would have to take more time
1051
469
# than 'timeout' for the client to be disabled, which is as it
1052
470
# should be.
1053
1054
if self.checker is not None and not self.checker.is_alive():
1055
logger.warning("Checker was not alive; joining")
1056
self.checker.join()
1057
self.checker = None
471
472
# If a checker exists, make sure it is not a zombie
473
try:
474
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
475
except (AttributeError, OSError) as error:
476
if (isinstance(error, OSError)
477
and error.errno != errno.ECHILD):
478
raise error
479
else:
480
if pid:
481
logger.warning("Checker was a zombie")
482
gobject.source_remove(self.checker_callback_tag)
483
self.checker_callback(pid, status,
484
self.current_checker_command)
1058
485
# Start a new checker if needed
1059
486
if self.checker is None:
1060
# Escape attributes for the shell
1061
escaped_attrs = {
1062
attr: re.escape(str(getattr(self, attr)))
1063
for attr in self.runtime_expansions}
1064
487
try:
1065
command = self.checker_command % escaped_attrs
1066
except TypeError as error:
1067
logger.error('Could not format string "%s"',
1068
self.checker_command,
1069
exc_info=error)
1070
return True # Try again later
488
# In case checker_command has exactly one % operator
489
command = self.checker_command % self.host
490
except TypeError:
491
# Escape attributes for the shell
492
escaped_attrs = dict(
493
(attr,
494
re.escape(unicode(str(getattr(self, attr, "")),
495
errors=
496
'replace')))
497
for attr in
498
self.runtime_expansions)
499
500
try:
501
command = self.checker_command % escaped_attrs
502
except TypeError as error:
503
logger.error('Could not format string "%s":'
504
' %s', self.checker_command, error)
505
return True # Try again later
1071
506
self.current_checker_command = command
1072
logger.info("Starting checker %r for %s", command,
1073
self.name)
1074
# We don't need to redirect stdout and stderr, since
1075
# in normal mode, that is already done by daemon(),
1076
# and in debug mode we don't want to. (Stdin is
1077
# always replaced by /dev/null.)
1078
# The exception is when not debugging but nevertheless
1079
# running in the foreground; use the previously
1080
# created wnull.
1081
popen_args = {"close_fds": True,
1082
"shell": True,
1083
"cwd": "/"}
1084
if (not self.server_settings["debug"]
1085
and self.server_settings["foreground"]):
1086
popen_args.update({"stdout": wnull,
1087
"stderr": wnull})
1088
pipe = multiprocessing.Pipe(duplex=False)
1089
self.checker = multiprocessing.Process(
1090
target=call_pipe,
1091
args=(pipe[1], subprocess.call, command),
1092
kwargs=popen_args)
1093
self.checker.start()
1094
self.checker_callback_tag = GLib.io_add_watch(
1095
pipe[0].fileno(), GLib.IO_IN,
1096
self.checker_callback, pipe[0], command)
1097
# Re-run this periodically if run by GLib.timeout_add
507
try:
508
logger.info("Starting checker %r for %s",
509
command, self.name)
510
# We don't need to redirect stdout and stderr, since
511
# in normal mode, that is already done by daemon(),
512
# and in debug mode we don't want to. (Stdin is
513
# always replaced by /dev/null.)
514
self.checker = subprocess.Popen(command,
515
close_fds=True,
516
shell=True, cwd="/")
517
self.checker_callback_tag = (gobject.child_watch_add
518
(self.checker.pid,
519
self.checker_callback,
520
data=command))
521
# The checker may have completed before the gobject
522
# watch was added. Check for this.
523
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
524
if pid:
525
gobject.source_remove(self.checker_callback_tag)
526
self.checker_callback(pid, status, command)
527
except OSError as error:
528
logger.error("Failed to start subprocess: %s",
529
error)
530
# Re-run this periodically if run by gobject.timeout_add
1098
531
return True
1099
532
1100
533
def stop_checker(self):
1101
534
"""Force the checker process, if any, to stop."""
1102
535
if self.checker_callback_tag:
1103
GLib.source_remove(self.checker_callback_tag)
536
gobject.source_remove(self.checker_callback_tag)
1104
537
self.checker_callback_tag = None
1105
538
if getattr(self, "checker", None) is None:
1106
539
return
1107
540
logger.debug("Stopping checker for %(name)s", vars(self))
1108
self.checker.terminate()
541
try:
542
os.kill(self.checker.pid, signal.SIGTERM)
543
#time.sleep(0.5)
544
#if self.checker.poll() is None:
545
# os.kill(self.checker.pid, signal.SIGKILL)
546
except OSError as error:
547
if error.errno != errno.ESRCH: # No such process
548
raise
1109
549
self.checker = None
1110
550
1111
1112
def dbus_service_property(dbus_interface,
1113
signature="v",
1114
access="readwrite",
1115
byte_arrays=False):
551
def dbus_service_property(dbus_interface, signature="v",
552
access="readwrite", byte_arrays=False):
1116
553
"""Decorators for marking methods of a DBusObjectWithProperties to
1117
554
become properties on the D-Bus.
1118
555
1119
556
The decorated method will be called with no arguments by "Get"
1120
557
and with one argument by "Set".
1121
558
1122
559
The parameters, where they are supported, are the same as
1123
560
dbus.service.method, except there is only "signature", since the
1124
561
type from Get() and the type sent to Set() is the same.
1127
564
# "Set" method, so we fail early here:
1128
565
if byte_arrays and signature != "ay":
1129
566
raise ValueError("Byte arrays not supported for non-'ay'"
1130
" signature {!r}".format(signature))
1131
567
" signature %r" % signature)
1132
568
def decorator(func):
1133
569
func._dbus_is_property = True
1134
570
func._dbus_interface = dbus_interface
1137
573
func._dbus_name = func.__name__
1138
574
if func._dbus_name.endswith("_dbus_property"):
1139
575
func._dbus_name = func._dbus_name[:-14]
1140
func._dbus_get_args_options = {'byte_arrays': byte_arrays}
1141
return func
1142
1143
return decorator
1144
1145
1146
def dbus_interface_annotations(dbus_interface):
1147
"""Decorator for marking functions returning interface annotations
1148
1149
Usage:
1150
1151
@dbus_interface_annotations("org.example.Interface")
1152
def _foo(self): # Function name does not matter
1153
return {"org.freedesktop.DBus.Deprecated": "true",
1154
"org.freedesktop.DBus.Property.EmitsChangedSignal":
1155
"false"}
1156
"""
1157
1158
def decorator(func):
1159
func._dbus_is_interface = True
1160
func._dbus_interface = dbus_interface
1161
func._dbus_name = dbus_interface
1162
return func
1163
1164
return decorator
1165
1166
1167
def dbus_annotations(annotations):
1168
"""Decorator to annotate D-Bus methods, signals or properties
1169
Usage:
1170
1171
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
1172
"org.freedesktop.DBus.Property."
1173
"EmitsChangedSignal": "false"})
1174
@dbus_service_property("org.example.Interface", signature="b",
1175
access="r")
1176
def Property_dbus_property(self):
1177
return dbus.Boolean(False)
1178
1179
See also the DBusObjectWithAnnotations class.
1180
"""
1181
1182
def decorator(func):
1183
func._dbus_annotations = annotations
1184
return func
1185
576
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
577
return func
1186
578
return decorator
1187
579
1188
580
1189
581
class DBusPropertyException(dbus.exceptions.DBusException):
1190
582
"""A base class for D-Bus property-related exceptions
1191
583
"""
1192
pass
584
def __unicode__(self):
585
return unicode(str(self))
1193
586
1194
587
1195
588
class DBusPropertyAccessException(DBusPropertyException):
1204
597
pass
1205
598
1206
599
1207
class DBusObjectWithAnnotations(dbus.service.Object):
1208
"""A D-Bus object with annotations.
1209
1210
Classes inheriting from this can use the dbus_annotations
1211
decorator to add annotations to methods or signals.
1212
"""
1213
1214
@staticmethod
1215
def _is_dbus_thing(thing):
1216
"""Returns a function testing if an attribute is a D-Bus thing
1217
1218
If called like _is_dbus_thing("method") it returns a function
1219
suitable for use as predicate to inspect.getmembers().
1220
"""
1221
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
1222
False)
1223
1224
def _get_all_dbus_things(self, thing):
1225
"""Returns a generator of (name, attribute) pairs
1226
"""
1227
return ((getattr(athing.__get__(self), "_dbus_name", name),
1228
athing.__get__(self))
1229
for cls in self.__class__.__mro__
1230
for name, athing in
1231
inspect.getmembers(cls, self._is_dbus_thing(thing)))
1232
1233
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1234
out_signature="s",
1235
path_keyword='object_path',
1236
connection_keyword='connection')
1237
def Introspect(self, object_path, connection):
1238
"""Overloading of standard D-Bus method.
1239
1240
Inserts annotation tags on methods and signals.
1241
"""
1242
xmlstring = dbus.service.Object.Introspect(self, object_path,
1243
connection)
1244
try:
1245
document = xml.dom.minidom.parseString(xmlstring)
1246
1247
for if_tag in document.getElementsByTagName("interface"):
1248
# Add annotation tags
1249
for typ in ("method", "signal"):
1250
for tag in if_tag.getElementsByTagName(typ):
1251
annots = dict()
1252
for name, prop in (self.
1253
_get_all_dbus_things(typ)):
1254
if (name == tag.getAttribute("name")
1255
and prop._dbus_interface
1256
== if_tag.getAttribute("name")):
1257
annots.update(getattr(
1258
prop, "_dbus_annotations", {}))
1259
for name, value in annots.items():
1260
ann_tag = document.createElement(
1261
"annotation")
1262
ann_tag.setAttribute("name", name)
1263
ann_tag.setAttribute("value", value)
1264
tag.appendChild(ann_tag)
1265
# Add interface annotation tags
1266
for annotation, value in dict(
1267
itertools.chain.from_iterable(
1268
annotations().items()
1269
for name, annotations
1270
in self._get_all_dbus_things("interface")
1271
if name == if_tag.getAttribute("name")
1272
)).items():
1273
ann_tag = document.createElement("annotation")
1274
ann_tag.setAttribute("name", annotation)
1275
ann_tag.setAttribute("value", value)
1276
if_tag.appendChild(ann_tag)
1277
# Fix argument name for the Introspect method itself
1278
if (if_tag.getAttribute("name")
1279
== dbus.INTROSPECTABLE_IFACE):
1280
for cn in if_tag.getElementsByTagName("method"):
1281
if cn.getAttribute("name") == "Introspect":
1282
for arg in cn.getElementsByTagName("arg"):
1283
if (arg.getAttribute("direction")
1284
== "out"):
1285
arg.setAttribute("name",
1286
"xml_data")
1287
xmlstring = document.toxml("utf-8")
1288
document.unlink()
1289
except (AttributeError, xml.dom.DOMException,
1290
xml.parsers.expat.ExpatError) as error:
1291
logger.error("Failed to override Introspection method",
1292
exc_info=error)
1293
return xmlstring
1294
1295
1296
class DBusObjectWithProperties(DBusObjectWithAnnotations):
600
class DBusObjectWithProperties(dbus.service.Object):
1297
601
"""A D-Bus object with properties.
1298
602
1299
603
Classes inheriting from this can use the dbus_service_property
1300
604
decorator to expose methods as D-Bus properties. It exposes the
1301
605
standard Get(), Set(), and GetAll() methods on the D-Bus.
1302
606
"""
1303
607
608
@staticmethod
609
def _is_dbus_property(obj):
610
return getattr(obj, "_dbus_is_property", False)
611
612
def _get_all_dbus_properties(self):
613
"""Returns a generator of (name, attribute) pairs
614
"""
615
return ((prop._dbus_name, prop)
616
for name, prop in
617
inspect.getmembers(self, self._is_dbus_property))
618
1304
619
def _get_dbus_property(self, interface_name, property_name):
1305
620
"""Returns a bound method if one exists which is a D-Bus
1306
621
property with the specified name and interface.
1307
622
"""
1308
for cls in self.__class__.__mro__:
1309
for name, value in inspect.getmembers(
1310
cls, self._is_dbus_thing("property")):
1311
if (value._dbus_name == property_name
1312
and value._dbus_interface == interface_name):
1313
return value.__get__(self)
1314
623
for name in (property_name,
624
property_name + "_dbus_property"):
625
prop = getattr(self, name, None)
626
if (prop is None
627
or not self._is_dbus_property(prop)
628
or prop._dbus_name != property_name
629
or (interface_name and prop._dbus_interface
630
and interface_name != prop._dbus_interface)):
631
continue
632
return prop
1315
633
# No such property
1316
raise DBusPropertyNotFound("{}:{}.{}".format(
1317
self.dbus_object_path, interface_name, property_name))
1318
1319
@classmethod
1320
def _get_all_interface_names(cls):
1321
"""Get a sequence of all interfaces supported by an object"""
1322
return (name for name in set(getattr(getattr(x, attr),
1323
"_dbus_interface", None)
1324
for x in (inspect.getmro(cls))
1325
for attr in dir(x))
1326
if name is not None)
1327
1328
@dbus.service.method(dbus.PROPERTIES_IFACE,
1329
in_signature="ss",
634
raise DBusPropertyNotFound(self.dbus_object_path + ":"
635
+ interface_name + "."
636
+ property_name)
637
638
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
1330
639
out_signature="v")
1331
640
def Get(self, interface_name, property_name):
1332
641
"""Standard D-Bus property Get() method, see D-Bus standard.
1338
647
if not hasattr(value, "variant_level"):
1339
648
return value
1340
649
return type(value)(value, variant_level=value.variant_level+1)
1341
650
1342
651
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
1343
652
def Set(self, interface_name, property_name, value):
1344
653
"""Standard D-Bus property Set() method, see D-Bus standard.
1350
659
# The byte_arrays option is not supported yet on
1351
660
# signatures other than "ay".
1352
661
if prop._dbus_signature != "ay":
1353
raise ValueError("Byte arrays not supported for non-"
1354
"'ay' signature {!r}"
1355
.format(prop._dbus_signature))
1356
value = dbus.ByteArray(b''.join(chr(byte)
1357
for byte in value))
662
raise ValueError
663
value = dbus.ByteArray(''.join(unichr(byte)
664
for byte in value))
1358
665
prop(value)
1359
1360
@dbus.service.method(dbus.PROPERTIES_IFACE,
1361
in_signature="s",
666
667
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
1362
668
out_signature="a{sv}")
1363
669
def GetAll(self, interface_name):
1364
670
"""Standard D-Bus property GetAll() method, see D-Bus
1366
672
1367
673
Note: Will not include properties with access="write".
1368
674
"""
1369
properties = {}
1370
for name, prop in self._get_all_dbus_things("property"):
675
all = {}
676
for name, prop in self._get_all_dbus_properties():
1371
677
if (interface_name
1372
678
and interface_name != prop._dbus_interface):
1373
679
# Interface non-empty but did not match
1377
683
continue
1378
684
value = prop()
1379
685
if not hasattr(value, "variant_level"):
1380
properties[name] = value
686
all[name] = value
1381
687
continue
1382
properties[name] = type(value)(
1383
value, variant_level=value.variant_level + 1)
1384
return dbus.Dictionary(properties, signature="sv")
1385
1386
@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
1387
def PropertiesChanged(self, interface_name, changed_properties,
1388
invalidated_properties):
1389
"""Standard D-Bus PropertiesChanged() signal, see D-Bus
1390
standard.
1391
"""
1392
pass
1393
688
all[name] = type(value)(value, variant_level=
689
value.variant_level+1)
690
return dbus.Dictionary(all, signature="sv")
691
1394
692
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1395
693
out_signature="s",
1396
694
path_keyword='object_path',
1397
695
connection_keyword='connection')
1398
696
def Introspect(self, object_path, connection):
1399
"""Overloading of standard D-Bus method.
1400
1401
Inserts property tags and interface annotation tags.
697
"""Standard D-Bus method, overloaded to insert property tags.
1402
698
"""
1403
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1404
object_path,
1405
connection)
699
xmlstring = dbus.service.Object.Introspect(self, object_path,
700
connection)
1406
701
try:
1407
702
document = xml.dom.minidom.parseString(xmlstring)
1408
1409
703
def make_tag(document, name, prop):
1410
704
e = document.createElement("property")
1411
705
e.setAttribute("name", name)
1412
706
e.setAttribute("type", prop._dbus_signature)
1413
707
e.setAttribute("access", prop._dbus_access)
1414
708
return e
1415
1416
709
for if_tag in document.getElementsByTagName("interface"):
1417
# Add property tags
1418
710
for tag in (make_tag(document, name, prop)
1419
711
for name, prop
1420
in self._get_all_dbus_things("property")
712
in self._get_all_dbus_properties()
1421
713
if prop._dbus_interface
1422
714
== if_tag.getAttribute("name")):
1423
715
if_tag.appendChild(tag)
1424
# Add annotation tags for properties
1425
for tag in if_tag.getElementsByTagName("property"):
1426
annots = dict()
1427
for name, prop in self._get_all_dbus_things(
1428
"property"):
1429
if (name == tag.getAttribute("name")
1430
and prop._dbus_interface
1431
== if_tag.getAttribute("name")):
1432
annots.update(getattr(
1433
prop, "_dbus_annotations", {}))
1434
for name, value in annots.items():
1435
ann_tag = document.createElement(
1436
"annotation")
1437
ann_tag.setAttribute("name", name)
1438
ann_tag.setAttribute("value", value)
1439
tag.appendChild(ann_tag)
1440
716
# Add the names to the return values for the
1441
717
# "org.freedesktop.DBus.Properties" methods
1442
718
if (if_tag.getAttribute("name")
1457
733
except (AttributeError, xml.dom.DOMException,
1458
734
xml.parsers.expat.ExpatError) as error:
1459
735
logger.error("Failed to override Introspection method",
1460
exc_info=error)
1461
return xmlstring
1462
1463
try:
1464
dbus.OBJECT_MANAGER_IFACE
1465
except AttributeError:
1466
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1467
1468
1469
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1470
"""A D-Bus object with an ObjectManager.
1471
1472
Classes inheriting from this exposes the standard
1473
GetManagedObjects call and the InterfacesAdded and
1474
InterfacesRemoved signals on the standard
1475
"org.freedesktop.DBus.ObjectManager" interface.
1476
1477
Note: No signals are sent automatically; they must be sent
1478
manually.
1479
"""
1480
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1481
out_signature="a{oa{sa{sv}}}")
1482
def GetManagedObjects(self):
1483
"""This function must be overridden"""
1484
raise NotImplementedError()
1485
1486
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1487
signature="oa{sa{sv}}")
1488
def InterfacesAdded(self, object_path, interfaces_and_properties):
1489
pass
1490
1491
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1492
def InterfacesRemoved(self, object_path, interfaces):
1493
pass
1494
1495
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1496
out_signature="s",
1497
path_keyword='object_path',
1498
connection_keyword='connection')
1499
def Introspect(self, object_path, connection):
1500
"""Overloading of standard D-Bus method.
1501
1502
Override return argument name of GetManagedObjects to be
1503
"objpath_interfaces_and_properties"
1504
"""
1505
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1506
object_path,
1507
connection)
1508
try:
1509
document = xml.dom.minidom.parseString(xmlstring)
1510
1511
for if_tag in document.getElementsByTagName("interface"):
1512
# Fix argument name for the GetManagedObjects method
1513
if (if_tag.getAttribute("name")
1514
== dbus.OBJECT_MANAGER_IFACE):
1515
for cn in if_tag.getElementsByTagName("method"):
1516
if (cn.getAttribute("name")
1517
== "GetManagedObjects"):
1518
for arg in cn.getElementsByTagName("arg"):
1519
if (arg.getAttribute("direction")
1520
== "out"):
1521
arg.setAttribute(
1522
"name",
1523
"objpath_interfaces"
1524
"_and_properties")
1525
xmlstring = document.toxml("utf-8")
1526
document.unlink()
1527
except (AttributeError, xml.dom.DOMException,
1528
xml.parsers.expat.ExpatError) as error:
1529
logger.error("Failed to override Introspection method",
1530
exc_info=error)
1531
return xmlstring
1532
1533
1534
def datetime_to_dbus(dt, variant_level=0):
1535
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1536
if dt is None:
1537
return dbus.String("", variant_level=variant_level)
1538
return dbus.String(dt.isoformat(), variant_level=variant_level)
1539
1540
1541
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1542
"""A class decorator; applied to a subclass of
1543
dbus.service.Object, it will add alternate D-Bus attributes with
1544
interface names according to the "alt_interface_names" mapping.
1545
Usage:
1546
1547
@alternate_dbus_interfaces({"org.example.Interface":
1548
"net.example.AlternateInterface"})
1549
class SampleDBusObject(dbus.service.Object):
1550
@dbus.service.method("org.example.Interface")
1551
def SampleDBusMethod():
1552
pass
1553
1554
The above "SampleDBusMethod" on "SampleDBusObject" will be
1555
reachable via two interfaces: "org.example.Interface" and
1556
"net.example.AlternateInterface", the latter of which will have
1557
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1558
"true", unless "deprecate" is passed with a False value.
1559
1560
This works for methods and signals, and also for D-Bus properties
1561
(from DBusObjectWithProperties) and interfaces (from the
1562
dbus_interface_annotations decorator).
1563
"""
1564
1565
def wrapper(cls):
1566
for orig_interface_name, alt_interface_name in (
1567
alt_interface_names.items()):
1568
attr = {}
1569
interface_names = set()
1570
# Go though all attributes of the class
1571
for attrname, attribute in inspect.getmembers(cls):
1572
# Ignore non-D-Bus attributes, and D-Bus attributes
1573
# with the wrong interface name
1574
if (not hasattr(attribute, "_dbus_interface")
1575
or not attribute._dbus_interface.startswith(
1576
orig_interface_name)):
1577
continue
1578
# Create an alternate D-Bus interface name based on
1579
# the current name
1580
alt_interface = attribute._dbus_interface.replace(
1581
orig_interface_name, alt_interface_name)
1582
interface_names.add(alt_interface)
1583
# Is this a D-Bus signal?
1584
if getattr(attribute, "_dbus_is_signal", False):
1585
# Extract the original non-method undecorated
1586
# function by black magic
1587
if sys.version_info.major == 2:
1588
nonmethod_func = (dict(
1589
zip(attribute.func_code.co_freevars,
1590
attribute.__closure__))
1591
["func"].cell_contents)
1592
else:
1593
nonmethod_func = (dict(
1594
zip(attribute.__code__.co_freevars,
1595
attribute.__closure__))
1596
["func"].cell_contents)
1597
# Create a new, but exactly alike, function
1598
# object, and decorate it to be a new D-Bus signal
1599
# with the alternate D-Bus interface name
1600
new_function = copy_function(nonmethod_func)
1601
new_function = (dbus.service.signal(
1602
alt_interface,
1603
attribute._dbus_signature)(new_function))
1604
# Copy annotations, if any
1605
try:
1606
new_function._dbus_annotations = dict(
1607
attribute._dbus_annotations)
1608
except AttributeError:
1609
pass
1610
1611
# Define a creator of a function to call both the
1612
# original and alternate functions, so both the
1613
# original and alternate signals gets sent when
1614
# the function is called
1615
def fixscope(func1, func2):
1616
"""This function is a scope container to pass
1617
func1 and func2 to the "call_both" function
1618
outside of its arguments"""
1619
1620
@functools.wraps(func2)
1621
def call_both(*args, **kwargs):
1622
"""This function will emit two D-Bus
1623
signals by calling func1 and func2"""
1624
func1(*args, **kwargs)
1625
func2(*args, **kwargs)
1626
# Make wrapper function look like a D-Bus
1627
# signal
1628
for name, attr in inspect.getmembers(func2):
1629
if name.startswith("_dbus_"):
1630
setattr(call_both, name, attr)
1631
1632
return call_both
1633
# Create the "call_both" function and add it to
1634
# the class
1635
attr[attrname] = fixscope(attribute, new_function)
1636
# Is this a D-Bus method?
1637
elif getattr(attribute, "_dbus_is_method", False):
1638
# Create a new, but exactly alike, function
1639
# object. Decorate it to be a new D-Bus method
1640
# with the alternate D-Bus interface name. Add it
1641
# to the class.
1642
attr[attrname] = (
1643
dbus.service.method(
1644
alt_interface,
1645
attribute._dbus_in_signature,
1646
attribute._dbus_out_signature)
1647
(copy_function(attribute)))
1648
# Copy annotations, if any
1649
try:
1650
attr[attrname]._dbus_annotations = dict(
1651
attribute._dbus_annotations)
1652
except AttributeError:
1653
pass
1654
# Is this a D-Bus property?
1655
elif getattr(attribute, "_dbus_is_property", False):
1656
# Create a new, but exactly alike, function
1657
# object, and decorate it to be a new D-Bus
1658
# property with the alternate D-Bus interface
1659
# name. Add it to the class.
1660
attr[attrname] = (dbus_service_property(
1661
alt_interface, attribute._dbus_signature,
1662
attribute._dbus_access,
1663
attribute._dbus_get_args_options
1664
["byte_arrays"])
1665
(copy_function(attribute)))
1666
# Copy annotations, if any
1667
try:
1668
attr[attrname]._dbus_annotations = dict(
1669
attribute._dbus_annotations)
1670
except AttributeError:
1671
pass
1672
# Is this a D-Bus interface?
1673
elif getattr(attribute, "_dbus_is_interface", False):
1674
# Create a new, but exactly alike, function
1675
# object. Decorate it to be a new D-Bus interface
1676
# with the alternate D-Bus interface name. Add it
1677
# to the class.
1678
attr[attrname] = (
1679
dbus_interface_annotations(alt_interface)
1680
(copy_function(attribute)))
1681
if deprecate:
1682
# Deprecate all alternate interfaces
1683
iname = "_AlternateDBusNames_interface_annotation{}"
1684
for interface_name in interface_names:
1685
1686
@dbus_interface_annotations(interface_name)
1687
def func(self):
1688
return {"org.freedesktop.DBus.Deprecated":
1689
"true"}
1690
# Find an unused name
1691
for aname in (iname.format(i)
1692
for i in itertools.count()):
1693
if aname not in attr:
1694
attr[aname] = func
1695
break
1696
if interface_names:
1697
# Replace the class with a new subclass of it with
1698
# methods, signals, etc. as created above.
1699
if sys.version_info.major == 2:
1700
cls = type(b"{}Alternate".format(cls.__name__),
1701
(cls, ), attr)
1702
else:
1703
cls = type("{}Alternate".format(cls.__name__),
1704
(cls, ), attr)
1705
return cls
1706
1707
return wrapper
1708
1709
1710
@alternate_dbus_interfaces({"se.recompile.Mandos":
1711
"se.bsnet.fukt.Mandos"})
736
error)
737
return xmlstring
738
739
1712
740
class ClientDBus(Client, DBusObjectWithProperties):
1713
741
"""A Client class using D-Bus
1714
742
1715
743
Attributes:
1716
744
dbus_object_path: dbus.ObjectPath
1717
745
bus: dbus.SystemBus()
1718
746
"""
1719
747
1720
748
runtime_expansions = (Client.runtime_expansions
1721
+ ("dbus_object_path", ))
1722
1723
_interface = "se.recompile.Mandos.Client"
1724
749
+ ("dbus_object_path",))
750
1725
751
# dbus.service.Object doesn't use super(), so we can't either.
1726
1727
def __init__(self, bus=None, *args, **kwargs):
752
753
def __init__(self, bus = None, *args, **kwargs):
754
self._approvals_pending = 0
1728
755
self.bus = bus
1729
756
Client.__init__(self, *args, **kwargs)
1730
757
# Only now, when this client is initialized, can it show up on
1731
758
# the D-Bus
1732
client_object_name = str(self.name).translate(
759
client_object_name = unicode(self.name).translate(
1733
760
{ord("."): ord("_"),
1734
761
ord("-"): ord("_")})
1735
self.dbus_object_path = dbus.ObjectPath(
1736
"/clients/" + client_object_name)
762
self.dbus_object_path = (dbus.ObjectPath
763
("/clients/" + client_object_name))
1737
764
DBusObjectWithProperties.__init__(self, self.bus,
1738
765
self.dbus_object_path)
1739
1740
def notifychangeproperty(transform_func, dbus_name,
1741
type_func=lambda x: x,
1742
variant_level=1,
1743
invalidate_only=False,
1744
_interface=_interface):
1745
""" Modify a variable so that it's a property which announces
1746
its changes to DBus.
1747
1748
transform_fun: Function that takes a value and a variant_level
1749
and transforms it to a D-Bus type.
1750
dbus_name: D-Bus name of the variable
1751
type_func: Function that transform the value before sending it
1752
to the D-Bus. Default: no transform
1753
variant_level: D-Bus variant level. Default: 1
1754
"""
1755
attrname = "_{}".format(dbus_name)
1756
1757
def setter(self, value):
1758
if hasattr(self, "dbus_object_path"):
1759
if (not hasattr(self, attrname) or
1760
type_func(getattr(self, attrname, None))
1761
!= type_func(value)):
1762
if invalidate_only:
1763
self.PropertiesChanged(
1764
_interface, dbus.Dictionary(),
1765
dbus.Array((dbus_name, )))
1766
else:
1767
dbus_value = transform_func(
1768
type_func(value),
1769
variant_level=variant_level)
1770
self.PropertyChanged(dbus.String(dbus_name),
1771
dbus_value)
1772
self.PropertiesChanged(
1773
_interface,
1774
dbus.Dictionary({dbus.String(dbus_name):
1775
dbus_value}),
1776
dbus.Array())
1777
setattr(self, attrname, value)
1778
1779
return property(lambda self: getattr(self, attrname), setter)
1780
1781
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1782
approvals_pending = notifychangeproperty(dbus.Boolean,
1783
"ApprovalPending",
1784
type_func=bool)
1785
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1786
last_enabled = notifychangeproperty(datetime_to_dbus,
1787
"LastEnabled")
1788
checker = notifychangeproperty(
1789
dbus.Boolean, "CheckerRunning",
1790
type_func=lambda checker: checker is not None)
1791
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1792
"LastCheckedOK")
1793
last_checker_status = notifychangeproperty(dbus.Int16,
1794
"LastCheckerStatus")
1795
last_approval_request = notifychangeproperty(
1796
datetime_to_dbus, "LastApprovalRequest")
1797
approved_by_default = notifychangeproperty(dbus.Boolean,
1798
"ApprovedByDefault")
1799
approval_delay = notifychangeproperty(
1800
dbus.UInt64, "ApprovalDelay",
1801
type_func=lambda td: td.total_seconds() * 1000)
1802
approval_duration = notifychangeproperty(
1803
dbus.UInt64, "ApprovalDuration",
1804
type_func=lambda td: td.total_seconds() * 1000)
1805
host = notifychangeproperty(dbus.String, "Host")
1806
timeout = notifychangeproperty(
1807
dbus.UInt64, "Timeout",
1808
type_func=lambda td: td.total_seconds() * 1000)
1809
extended_timeout = notifychangeproperty(
1810
dbus.UInt64, "ExtendedTimeout",
1811
type_func=lambda td: td.total_seconds() * 1000)
1812
interval = notifychangeproperty(
1813
dbus.UInt64, "Interval",
1814
type_func=lambda td: td.total_seconds() * 1000)
1815
checker_command = notifychangeproperty(dbus.String, "Checker")
1816
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1817
invalidate_only=True)
1818
1819
del notifychangeproperty
1820
766
767
def _get_approvals_pending(self):
768
return self._approvals_pending
769
def _set_approvals_pending(self, value):
770
old_value = self._approvals_pending
771
self._approvals_pending = value
772
bval = bool(value)
773
if (hasattr(self, "dbus_object_path")
774
and bval is not bool(old_value)):
775
dbus_bool = dbus.Boolean(bval, variant_level=1)
776
self.PropertyChanged(dbus.String("ApprovalPending"),
777
dbus_bool)
778
779
approvals_pending = property(_get_approvals_pending,
780
_set_approvals_pending)
781
del _get_approvals_pending, _set_approvals_pending
782
783
@staticmethod
784
def _datetime_to_dbus(dt, variant_level=0):
785
"""Convert a UTC datetime.datetime() to a D-Bus type."""
786
return dbus.String(dt.isoformat(),
787
variant_level=variant_level)
788
789
def enable(self):
790
oldstate = getattr(self, "enabled", False)
791
r = Client.enable(self)
792
if oldstate != self.enabled:
793
# Emit D-Bus signals
794
self.PropertyChanged(dbus.String("Enabled"),
795
dbus.Boolean(True, variant_level=1))
796
self.PropertyChanged(
797
dbus.String("LastEnabled"),
798
self._datetime_to_dbus(self.last_enabled,
799
variant_level=1))
800
return r
801
802
def disable(self, quiet = False):
803
oldstate = getattr(self, "enabled", False)
804
r = Client.disable(self, quiet=quiet)
805
if not quiet and oldstate != self.enabled:
806
# Emit D-Bus signal
807
self.PropertyChanged(dbus.String("Enabled"),
808
dbus.Boolean(False, variant_level=1))
809
return r
810
1821
811
def __del__(self, *args, **kwargs):
1822
812
try:
1823
813
self.remove_from_connection()
1826
816
if hasattr(DBusObjectWithProperties, "__del__"):
1827
817
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1828
818
Client.__del__(self, *args, **kwargs)
1829
1830
def checker_callback(self, source, condition,
1831
connection, command, *args, **kwargs):
1832
ret = Client.checker_callback(self, source, condition,
1833
connection, command, *args,
1834
**kwargs)
1835
exitstatus = self.last_checker_status
1836
if exitstatus >= 0:
819
820
def checker_callback(self, pid, condition, command,
821
*args, **kwargs):
822
self.checker_callback_tag = None
823
self.checker = None
824
# Emit D-Bus signal
825
self.PropertyChanged(dbus.String("CheckerRunning"),
826
dbus.Boolean(False, variant_level=1))
827
if os.WIFEXITED(condition):
828
exitstatus = os.WEXITSTATUS(condition)
1837
829
# Emit D-Bus signal
1838
830
self.CheckerCompleted(dbus.Int16(exitstatus),
1839
# This is specific to GNU libC
1840
dbus.Int64(exitstatus << 8),
831
dbus.Int64(condition),
1841
832
dbus.String(command))
1842
833
else:
1843
834
# Emit D-Bus signal
1844
835
self.CheckerCompleted(dbus.Int16(-1),
1845
dbus.Int64(
1846
# This is specific to GNU libC
1847
(exitstatus << 8)
1848
| self.last_checker_signal),
836
dbus.Int64(condition),
1849
837
dbus.String(command))
1850
return ret
1851
838
839
return Client.checker_callback(self, pid, condition, command,
840
*args, **kwargs)
841
842
def checked_ok(self, *args, **kwargs):
843
Client.checked_ok(self, *args, **kwargs)
844
# Emit D-Bus signal
845
self.PropertyChanged(
846
dbus.String("LastCheckedOK"),
847
(self._datetime_to_dbus(self.last_checked_ok,
848
variant_level=1)))
849
850
def need_approval(self, *args, **kwargs):
851
r = Client.need_approval(self, *args, **kwargs)
852
# Emit D-Bus signal
853
self.PropertyChanged(
854
dbus.String("LastApprovalRequest"),
855
(self._datetime_to_dbus(self.last_approval_request,
856
variant_level=1)))
857
return r
858
1852
859
def start_checker(self, *args, **kwargs):
1853
old_checker_pid = getattr(self.checker, "pid", None)
860
old_checker = self.checker
861
if self.checker is not None:
862
old_checker_pid = self.checker.pid
863
else:
864
old_checker_pid = None
1854
865
r = Client.start_checker(self, *args, **kwargs)
1855
866
# Only if new checker process was started
1856
867
if (self.checker is not None
1857
868
and old_checker_pid != self.checker.pid):
1858
869
# Emit D-Bus signal
1859
870
self.CheckerStarted(self.current_checker_command)
871
self.PropertyChanged(
872
dbus.String("CheckerRunning"),
873
dbus.Boolean(True, variant_level=1))
874
return r
875
876
def stop_checker(self, *args, **kwargs):
877
old_checker = getattr(self, "checker", None)
878
r = Client.stop_checker(self, *args, **kwargs)
879
if (old_checker is not None
880
and getattr(self, "checker", None) is None):
881
self.PropertyChanged(dbus.String("CheckerRunning"),
882
dbus.Boolean(False, variant_level=1))
1860
883
return r
1861
884
1862
885
def _reset_approved(self):
1863
self.approved = None
886
self._approved = None
1864
887
return False
1865
888
1866
889
def approve(self, value=True):
1867
self.approved = value
1868
GLib.timeout_add(int(self.approval_duration.total_seconds()
1869
* 1000), self._reset_approved)
1870
890
self.send_changedstate()
1871
1872
# D-Bus methods, signals & properties
1873
1874
# Interfaces
1875
1876
# Signals
1877
891
self._approved = value
892
gobject.timeout_add(self._timedelta_to_milliseconds
893
(self.approval_duration),
894
self._reset_approved)
895
896
897
## D-Bus methods, signals & properties
898
_interface = "se.bsnet.fukt.Mandos.Client"
899
900
## Signals
901
1878
902
# CheckerCompleted - signal
1879
903
@dbus.service.signal(_interface, signature="nxs")
1880
904
def CheckerCompleted(self, exitcode, waitstatus, command):
1881
905
"D-Bus signal"
1882
906
pass
1883
907
1884
908
# CheckerStarted - signal
1885
909
@dbus.service.signal(_interface, signature="s")
1886
910
def CheckerStarted(self, command):
1887
911
"D-Bus signal"
1888
912
pass
1889
913
1890
914
# PropertyChanged - signal
1891
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1892
915
@dbus.service.signal(_interface, signature="sv")
1893
916
def PropertyChanged(self, property, value):
1894
917
"D-Bus signal"
1895
918
pass
1896
919
1897
920
# GotSecret - signal
1898
921
@dbus.service.signal(_interface)
1899
922
def GotSecret(self):
1902
925
server to mandos-client
1903
926
"""
1904
927
pass
1905
928
1906
929
# Rejected - signal
1907
930
@dbus.service.signal(_interface, signature="s")
1908
931
def Rejected(self, reason):
1909
932
"D-Bus signal"
1910
933
pass
1911
934
1912
935
# NeedApproval - signal
1913
936
@dbus.service.signal(_interface, signature="tb")
1914
937
def NeedApproval(self, timeout, default):
1915
938
"D-Bus signal"
1916
939
return self.need_approval()
1917
1918
# Methods
1919
940
941
## Methods
942
1920
943
# Approve - method
1921
944
@dbus.service.method(_interface, in_signature="b")
1922
945
def Approve(self, value):
1923
946
self.approve(value)
1924
947
1925
948
# CheckedOK - method
1926
949
@dbus.service.method(_interface)
1927
950
def CheckedOK(self):
1928
951
self.checked_ok()
1929
952
1930
953
# Enable - method
1931
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1932
954
@dbus.service.method(_interface)
1933
955
def Enable(self):
1934
956
"D-Bus method"
1935
957
self.enable()
1936
958
1937
959
# StartChecker - method
1938
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1939
960
@dbus.service.method(_interface)
1940
961
def StartChecker(self):
1941
962
"D-Bus method"
1942
963
self.start_checker()
1943
964
1944
965
# Disable - method
1945
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1946
966
@dbus.service.method(_interface)
1947
967
def Disable(self):
1948
968
"D-Bus method"
1949
969
self.disable()
1950
970
1951
971
# StopChecker - method
1952
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1953
972
@dbus.service.method(_interface)
1954
973
def StopChecker(self):
1955
974
self.stop_checker()
1956
1957
# Properties
1958
975
976
## Properties
977
1959
978
# ApprovalPending - property
1960
979
@dbus_service_property(_interface, signature="b", access="read")
1961
980
def ApprovalPending_dbus_property(self):
1962
981
return dbus.Boolean(bool(self.approvals_pending))
1963
982
1964
983
# ApprovedByDefault - property
1965
@dbus_service_property(_interface,
1966
signature="b",
984
@dbus_service_property(_interface, signature="b",
1967
985
access="readwrite")
1968
986
def ApprovedByDefault_dbus_property(self, value=None):
1969
987
if value is None: # get
1970
988
return dbus.Boolean(self.approved_by_default)
1971
989
self.approved_by_default = bool(value)
1972
990
# Emit D-Bus signal
991
self.PropertyChanged(dbus.String("ApprovedByDefault"),
992
dbus.Boolean(value, variant_level=1))
993
1973
994
# ApprovalDelay - property
1974
@dbus_service_property(_interface,
1975
signature="t",
995
@dbus_service_property(_interface, signature="t",
1976
996
access="readwrite")
1977
997
def ApprovalDelay_dbus_property(self, value=None):
1978
998
if value is None: # get
1979
return dbus.UInt64(self.approval_delay.total_seconds()
1980
* 1000)
999
return dbus.UInt64(self.approval_delay_milliseconds())
1981
1000
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1982
1001
# Emit D-Bus signal
1002
self.PropertyChanged(dbus.String("ApprovalDelay"),
1003
dbus.UInt64(value, variant_level=1))
1004
1983
1005
# ApprovalDuration - property
1984
@dbus_service_property(_interface,
1985
signature="t",
1006
@dbus_service_property(_interface, signature="t",
1986
1007
access="readwrite")
1987
1008
def ApprovalDuration_dbus_property(self, value=None):
1988
1009
if value is None: # get
1989
return dbus.UInt64(self.approval_duration.total_seconds()
1990
* 1000)
1010
return dbus.UInt64(self._timedelta_to_milliseconds(
1011
self.approval_duration))
1991
1012
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1992
1013
# Emit D-Bus signal
1014
self.PropertyChanged(dbus.String("ApprovalDuration"),
1015
dbus.UInt64(value, variant_level=1))
1016
1993
1017
# Name - property
1994
@dbus_annotations(
1995
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1996
1018
@dbus_service_property(_interface, signature="s", access="read")
1997
1019
def Name_dbus_property(self):
1998
1020
return dbus.String(self.name)
1999
1021
2000
1022
# Fingerprint - property
2001
@dbus_annotations(
2002
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2003
1023
@dbus_service_property(_interface, signature="s", access="read")
2004
1024
def Fingerprint_dbus_property(self):
2005
1025
return dbus.String(self.fingerprint)
2006
1026
2007
1027
# Host - property
2008
@dbus_service_property(_interface,
2009
signature="s",
1028
@dbus_service_property(_interface, signature="s",
2010
1029
access="readwrite")
2011
1030
def Host_dbus_property(self, value=None):
2012
1031
if value is None: # get
2013
1032
return dbus.String(self.host)
2014
self.host = str(value)
2015
1033
self.host = value
1034
# Emit D-Bus signal
1035
self.PropertyChanged(dbus.String("Host"),
1036
dbus.String(value, variant_level=1))
1037
2016
1038
# Created - property
2017
@dbus_annotations(
2018
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2019
1039
@dbus_service_property(_interface, signature="s", access="read")
2020
1040
def Created_dbus_property(self):
2021
return datetime_to_dbus(self.created)
2022
1041
return dbus.String(self._datetime_to_dbus(self.created))
1042
2023
1043
# LastEnabled - property
2024
1044
@dbus_service_property(_interface, signature="s", access="read")
2025
1045
def LastEnabled_dbus_property(self):
2026
return datetime_to_dbus(self.last_enabled)
2027
1046
if self.last_enabled is None:
1047
return dbus.String("")
1048
return dbus.String(self._datetime_to_dbus(self.last_enabled))
1049
2028
1050
# Enabled - property
2029
@dbus_service_property(_interface,
2030
signature="b",
1051
@dbus_service_property(_interface, signature="b",
2031
1052
access="readwrite")
2032
1053
def Enabled_dbus_property(self, value=None):
2033
1054
if value is None: # get
2036
1057
self.enable()
2037
1058
else:
2038
1059
self.disable()
2039
1060
2040
1061
# LastCheckedOK - property
2041
@dbus_service_property(_interface,
2042
signature="s",
1062
@dbus_service_property(_interface, signature="s",
2043
1063
access="readwrite")
2044
1064
def LastCheckedOK_dbus_property(self, value=None):
2045
1065
if value is not None:
2046
1066
self.checked_ok()
2047
1067
return
2048
return datetime_to_dbus(self.last_checked_ok)
2049
2050
# LastCheckerStatus - property
2051
@dbus_service_property(_interface, signature="n", access="read")
2052
def LastCheckerStatus_dbus_property(self):
2053
return dbus.Int16(self.last_checker_status)
2054
2055
# Expires - property
2056
@dbus_service_property(_interface, signature="s", access="read")
2057
def Expires_dbus_property(self):
2058
return datetime_to_dbus(self.expires)
2059
1068
if self.last_checked_ok is None:
1069
return dbus.String("")
1070
return dbus.String(self._datetime_to_dbus(self
1071
.last_checked_ok))
1072
2060
1073
# LastApprovalRequest - property
2061
1074
@dbus_service_property(_interface, signature="s", access="read")
2062
1075
def LastApprovalRequest_dbus_property(self):
2063
return datetime_to_dbus(self.last_approval_request)
2064
1076
if self.last_approval_request is None:
1077
return dbus.String("")
1078
return dbus.String(self.
1079
_datetime_to_dbus(self
1080
.last_approval_request))
1081
2065
1082
# Timeout - property
2066
@dbus_service_property(_interface,
2067
signature="t",
1083
@dbus_service_property(_interface, signature="t",
2068
1084
access="readwrite")
2069
1085
def Timeout_dbus_property(self, value=None):
2070
1086
if value is None: # get
2071
return dbus.UInt64(self.timeout.total_seconds() * 1000)
2072
old_timeout = self.timeout
1087
return dbus.UInt64(self.timeout_milliseconds())
2073
1088
self.timeout = datetime.timedelta(0, 0, 0, value)
2074
# Reschedule disabling
2075
if self.enabled:
2076
now = datetime.datetime.utcnow()
2077
self.expires += self.timeout - old_timeout
2078
if self.expires <= now:
2079
# The timeout has passed
2080
self.disable()
2081
else:
2082
if (getattr(self, "disable_initiator_tag", None)
2083
is None):
2084
return
2085
GLib.source_remove(self.disable_initiator_tag)
2086
self.disable_initiator_tag = GLib.timeout_add(
2087
int((self.expires - now).total_seconds() * 1000),
2088
self.disable)
2089
2090
# ExtendedTimeout - property
2091
@dbus_service_property(_interface,
2092
signature="t",
2093
access="readwrite")
2094
def ExtendedTimeout_dbus_property(self, value=None):
2095
if value is None: # get
2096
return dbus.UInt64(self.extended_timeout.total_seconds()
2097
* 1000)
2098
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
2099
1089
# Emit D-Bus signal
1090
self.PropertyChanged(dbus.String("Timeout"),
1091
dbus.UInt64(value, variant_level=1))
1092
if getattr(self, "disable_initiator_tag", None) is None:
1093
return
1094
# Reschedule timeout
1095
gobject.source_remove(self.disable_initiator_tag)
1096
self.disable_initiator_tag = None
1097
time_to_die = (self.
1098
_timedelta_to_milliseconds((self
1099
.last_checked_ok
1100
+ self.timeout)
1101
- datetime.datetime
1102
.utcnow()))
1103
if time_to_die <= 0:
1104
# The timeout has passed
1105
self.disable()
1106
else:
1107
self.disable_initiator_tag = (gobject.timeout_add
1108
(time_to_die, self.disable))
1109
2100
1110
# Interval - property
2101
@dbus_service_property(_interface,
2102
signature="t",
1111
@dbus_service_property(_interface, signature="t",
2103
1112
access="readwrite")
2104
1113
def Interval_dbus_property(self, value=None):
2105
1114
if value is None: # get
2106
return dbus.UInt64(self.interval.total_seconds() * 1000)
1115
return dbus.UInt64(self.interval_milliseconds())
2107
1116
self.interval = datetime.timedelta(0, 0, 0, value)
1117
# Emit D-Bus signal
1118
self.PropertyChanged(dbus.String("Interval"),
1119
dbus.UInt64(value, variant_level=1))
2108
1120
if getattr(self, "checker_initiator_tag", None) is None:
2109
1121
return
2110
if self.enabled:
2111
# Reschedule checker run
2112
GLib.source_remove(self.checker_initiator_tag)
2113
self.checker_initiator_tag = GLib.timeout_add(
2114
value, self.start_checker)
2115
self.start_checker() # Start one now, too
1122
# Reschedule checker run
1123
gobject.source_remove(self.checker_initiator_tag)
1124
self.checker_initiator_tag = (gobject.timeout_add
1125
(value, self.start_checker))
1126
self.start_checker() # Start one now, too
2116
1127
2117
1128
# Checker - property
2118
@dbus_service_property(_interface,
2119
signature="s",
1129
@dbus_service_property(_interface, signature="s",
2120
1130
access="readwrite")
2121
1131
def Checker_dbus_property(self, value=None):
2122
1132
if value is None: # get
2123
1133
return dbus.String(self.checker_command)
2124
self.checker_command = str(value)
2125
1134
self.checker_command = value
1135
# Emit D-Bus signal
1136
self.PropertyChanged(dbus.String("Checker"),
1137
dbus.String(self.checker_command,
1138
variant_level=1))
1139
2126
1140
# CheckerRunning - property
2127
@dbus_service_property(_interface,
2128
signature="b",
1141
@dbus_service_property(_interface, signature="b",
2129
1142
access="readwrite")
2130
1143
def CheckerRunning_dbus_property(self, value=None):
2131
1144
if value is None: # get
2134
1147
self.start_checker()
2135
1148
else:
2136
1149
self.stop_checker()
2137
1150
2138
1151
# ObjectPath - property
2139
@dbus_annotations(
2140
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
2141
"org.freedesktop.DBus.Deprecated": "true"})
2142
1152
@dbus_service_property(_interface, signature="o", access="read")
2143
1153
def ObjectPath_dbus_property(self):
2144
return self.dbus_object_path # is already a dbus.ObjectPath
2145
1154
return self.dbus_object_path # is already a dbus.ObjectPath
1155
2146
1156
# Secret = property
2147
@dbus_annotations(
2148
{"org.freedesktop.DBus.Property.EmitsChangedSignal":
2149
"invalidates"})
2150
@dbus_service_property(_interface,
2151
signature="ay",
2152
access="write",
2153
byte_arrays=True)
1157
@dbus_service_property(_interface, signature="ay",
1158
access="write", byte_arrays=True)
2154
1159
def Secret_dbus_property(self, value):
2155
self.secret = bytes(value)
2156
1160
self.secret = str(value)
1161
2157
1162
del _interface
2158
1163
2159
1164
2162
1167
self._pipe = child_pipe
2163
1168
self._pipe.send(('init', fpr, address))
2164
1169
if not self._pipe.recv():
2165
raise KeyError(fpr)
1170
raise KeyError()
2166
1171
2167
1172
def __getattribute__(self, name):
2168
if name == '_pipe':
1173
if(name == '_pipe'):
2169
1174
return super(ProxyClient, self).__getattribute__(name)
2170
1175
self._pipe.send(('getattr', name))
2171
1176
data = self._pipe.recv()
2172
1177
if data[0] == 'data':
2173
1178
return data[1]
2174
1179
if data[0] == 'function':
2175
2176
1180
def func(*args, **kwargs):
2177
1181
self._pipe.send(('funcall', name, args, kwargs))
2178
1182
return self._pipe.recv()[1]
2179
2180
1183
return func
2181
1184
2182
1185
def __setattr__(self, name, value):
2183
if name == '_pipe':
1186
if(name == '_pipe'):
2184
1187
return super(ProxyClient, self).__setattr__(name, value)
2185
1188
self._pipe.send(('setattr', name, value))
2186
1189
2187
1190
2188
1191
class ClientHandler(socketserver.BaseRequestHandler, object):
2189
1192
"""A class to handle client connections.
2190
1193
2191
1194
Instantiated once for each connection to handle it.
2192
1195
Note: This will run in its own forked process."""
2193
1196
2194
1197
def handle(self):
2195
1198
with contextlib.closing(self.server.child_pipe) as child_pipe:
2196
1199
logger.info("TCP connection from: %s",
2197
str(self.client_address))
1200
unicode(self.client_address))
2198
1201
logger.debug("Pipe FD: %d",
2199
1202
self.server.child_pipe.fileno())
2200
1203
2201
session = gnutls.ClientSession(self.request)
2202
2203
# priority = ':'.join(("NONE", "+VERS-TLS1.1",
2204
# "+AES-256-CBC", "+SHA1",
2205
# "+COMP-NULL", "+CTYPE-OPENPGP",
2206
# "+DHE-DSS"))
1204
session = (gnutls.connection
1205
.ClientSession(self.request,
1206
gnutls.connection
1207
.X509Credentials()))
1208
1209
# Note: gnutls.connection.X509Credentials is really a
1210
# generic GnuTLS certificate credentials object so long as
1211
# no X.509 keys are added to it. Therefore, we can use it
1212
# here despite using OpenPGP certificates.
1213
1214
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1215
# "+AES-256-CBC", "+SHA1",
1216
# "+COMP-NULL", "+CTYPE-OPENPGP",
1217
# "+DHE-DSS"))
2207
1218
# Use a fallback default, since this MUST be set.
2208
1219
priority = self.server.gnutls_priority
2209
1220
if priority is None:
2210
1221
priority = "NORMAL"
2211
gnutls.priority_set_direct(session._c_object,
2212
priority.encode("utf-8"),
2213
None)
1222
(gnutls.library.functions
1223
.gnutls_priority_set_direct(session._c_object,
1224
priority, None))
2214
1225
2215
1226
# Start communication using the Mandos protocol
2216
1227
# Get protocol number
2218
1229
logger.debug("Protocol version: %r", line)
2219
1230
try:
2220
1231
if int(line.strip().split()[0]) > 1:
2221
raise RuntimeError(line)
1232
raise RuntimeError
2222
1233
except (ValueError, IndexError, RuntimeError) as error:
2223
1234
logger.error("Unknown protocol version: %s", error)
2224
1235
return
2226
1237
# Start GnuTLS connection
2227
1238
try:
2228
1239
session.handshake()
2229
except gnutls.Error as error:
1240
except gnutls.errors.GNUTLSError as error:
2230
1241
logger.warning("Handshake failed: %s", error)
2231
1242
# Do not run session.bye() here: the session is not
2232
1243
# established. Just abandon the request.
2236
1247
approval_required = False
2237
1248
try:
2238
1249
try:
2239
fpr = self.fingerprint(
2240
self.peer_certificate(session))
2241
except (TypeError, gnutls.Error) as error:
1250
fpr = self.fingerprint(self.peer_certificate
1251
(session))
1252
except (TypeError,
1253
gnutls.errors.GNUTLSError) as error:
2242
1254
logger.warning("Bad certificate: %s", error)
2243
1255
return
2244
1256
logger.debug("Fingerprint: %s", fpr)
2248
1260
self.client_address)
2249
1261
except KeyError:
2250
1262
return
2251
1263
2252
1264
if client.approval_delay:
2253
1265
delay = client.approval_delay
2254
1266
client.approvals_pending += 1
2255
1267
approval_required = True
2256
1268
2257
1269
while True:
2258
1270
if not client.enabled:
2259
1271
logger.info("Client %s is disabled",
2260
client.name)
1272
client.name)
2261
1273
if self.server.use_dbus:
2262
1274
# Emit D-Bus signal
2263
client.Rejected("Disabled")
1275
client.Rejected("Disabled")
2264
1276
return
2265
2266
if client.approved or not client.approval_delay:
2267
# We are approved or approval is disabled
1277
1278
if client._approved or not client.approval_delay:
1279
#We are approved or approval is disabled
2268
1280
break
2269
elif client.approved is None:
1281
elif client._approved is None:
2270
1282
logger.info("Client %s needs approval",
2271
1283
client.name)
2272
1284
if self.server.use_dbus:
2273
1285
# Emit D-Bus signal
2274
1286
client.NeedApproval(
2275
client.approval_delay.total_seconds()
2276
* 1000, client.approved_by_default)
1287
client.approval_delay_milliseconds(),
1288
client.approved_by_default)
2277
1289
else:
2278
1290
logger.warning("Client %s was not approved",
2279
1291
client.name)
2281
1293
# Emit D-Bus signal
2282
1294
client.Rejected("Denied")
2283
1295
return
2284
2285
# wait until timeout or approved
1296
1297
#wait until timeout or approved
1298
#x = float(client._timedelta_to_milliseconds(delay))
2286
1299
time = datetime.datetime.now()
2287
1300
client.changedstate.acquire()
2288
client.changedstate.wait(delay.total_seconds())
1301
client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))
2289
1302
client.changedstate.release()
2290
1303
time2 = datetime.datetime.now()
2291
1304
if (time2 - time) >= delay:
2301
1314
break
2302
1315
else:
2303
1316
delay -= time2 - time
2304
2305
try:
2306
session.send(client.secret)
2307
except gnutls.Error as error:
2308
logger.warning("gnutls send failed",
2309
exc_info=error)
2310
return
1317
1318
sent_size = 0
1319
while sent_size < len(client.secret):
1320
try:
1321
sent = session.send(client.secret[sent_size:])
1322
except gnutls.errors.GNUTLSError as error:
1323
logger.warning("gnutls send failed")
1324
return
1325
logger.debug("Sent: %d, remaining: %d",
1326
sent, len(client.secret)
1327
- (sent_size + sent))
1328
sent_size += sent
2311
1329
2312
1330
logger.info("Sending secret to %s", client.name)
2313
# bump the timeout using extended_timeout
2314
client.bump_timeout(client.extended_timeout)
1331
# bump the timeout as if seen
1332
client.checked_ok()
2315
1333
if self.server.use_dbus:
2316
1334
# Emit D-Bus signal
2317
1335
client.GotSecret()
2318
1336
2319
1337
finally:
2320
1338
if approval_required:
2321
1339
client.approvals_pending -= 1
2322
1340
try:
2323
1341
session.bye()
2324
except gnutls.Error as error:
2325
logger.warning("GnuTLS bye failed",
2326
exc_info=error)
2327
1342
except gnutls.errors.GNUTLSError as error:
1343
logger.warning("GnuTLS bye failed")
1344
2328
1345
@staticmethod
2329
1346
def peer_certificate(session):
2330
1347
"Return the peer's OpenPGP certificate as a bytestring"
2331
1348
# If not an OpenPGP certificate...
2332
if (gnutls.certificate_type_get(session._c_object)
2333
!= gnutls.CRT_OPENPGP):
2334
# ...return invalid data
2335
return b""
1349
if (gnutls.library.functions
1350
.gnutls_certificate_type_get(session._c_object)
1351
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1352
# ...do the normal thing
1353
return session.peer_certificate
2336
1354
list_size = ctypes.c_uint(1)
2337
cert_list = (gnutls.certificate_get_peers
1355
cert_list = (gnutls.library.functions
1356
.gnutls_certificate_get_peers
2338
1357
(session._c_object, ctypes.byref(list_size)))
2339
1358
if not bool(cert_list) and list_size.value != 0:
2340
raise gnutls.Error("error getting peer certificate")
1359
raise gnutls.errors.GNUTLSError("error getting peer"
1360
" certificate")
2341
1361
if list_size.value == 0:
2342
1362
return None
2343
1363
cert = cert_list[0]
2344
1364
return ctypes.string_at(cert.data, cert.size)
2345
1365
2346
1366
@staticmethod
2347
1367
def fingerprint(openpgp):
2348
1368
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
2349
1369
# New GnuTLS "datum" with the OpenPGP public key
2350
datum = gnutls.datum_t(
2351
ctypes.cast(ctypes.c_char_p(openpgp),
2352
ctypes.POINTER(ctypes.c_ubyte)),
2353
ctypes.c_uint(len(openpgp)))
1370
datum = (gnutls.library.types
1371
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1372
ctypes.POINTER
1373
(ctypes.c_ubyte)),
1374
ctypes.c_uint(len(openpgp))))
2354
1375
# New empty GnuTLS certificate
2355
crt = gnutls.openpgp_crt_t()
2356
gnutls.openpgp_crt_init(ctypes.byref(crt))
1376
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1377
(gnutls.library.functions
1378
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
2357
1379
# Import the OpenPGP public key into the certificate
2358
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2359
gnutls.OPENPGP_FMT_RAW)
1380
(gnutls.library.functions
1381
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1382
gnutls.library.constants
1383
.GNUTLS_OPENPGP_FMT_RAW))
2360
1384
# Verify the self signature in the key
2361
1385
crtverify = ctypes.c_uint()
2362
gnutls.openpgp_crt_verify_self(crt, 0,
2363
ctypes.byref(crtverify))
1386
(gnutls.library.functions
1387
.gnutls_openpgp_crt_verify_self(crt, 0,
1388
ctypes.byref(crtverify)))
2364
1389
if crtverify.value != 0:
2365
gnutls.openpgp_crt_deinit(crt)
2366
raise gnutls.CertificateSecurityError("Verify failed")
1390
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1391
raise (gnutls.errors.CertificateSecurityError
1392
("Verify failed"))
2367
1393
# New buffer for the fingerprint
2368
1394
buf = ctypes.create_string_buffer(20)
2369
1395
buf_len = ctypes.c_size_t()
2370
1396
# Get the fingerprint from the certificate into the buffer
2371
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2372
ctypes.byref(buf_len))
1397
(gnutls.library.functions
1398
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1399
ctypes.byref(buf_len)))
2373
1400
# Deinit the certificate
2374
gnutls.openpgp_crt_deinit(crt)
1401
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2375
1402
# Convert the buffer to a Python bytestring
2376
1403
fpr = ctypes.string_at(buf, buf_len.value)
2377
1404
# Convert the bytestring to hexadecimal notation
2378
hex_fpr = binascii.hexlify(fpr).upper()
1405
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
2379
1406
return hex_fpr
2380
1407
2381
1408
2382
1409
class MultiprocessingMixIn(object):
2383
1410
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2384
2385
1411
def sub_process_main(self, request, address):
2386
1412
try:
2387
1413
self.finish_request(request, address)
2388
except Exception:
1414
except:
2389
1415
self.handle_error(request, address)
2390
1416
self.close_request(request)
2391
1417
2392
1418
def process_request(self, request, address):
2393
1419
"""Start a new process to process the request."""
2394
proc = multiprocessing.Process(target=self.sub_process_main,
2395
args=(request, address))
2396
proc.start()
2397
return proc
2398
1420
multiprocessing.Process(target = self.sub_process_main,
1421
args = (request, address)).start()
2399
1422
2400
1423
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
2401
1424
""" adds a pipe to the MixIn """
2402
2403
1425
def process_request(self, request, client_address):
2404
1426
"""Overrides and wraps the original process_request().
2405
1427
2406
1428
This function creates a new pipe in self.pipe
2407
1429
"""
2408
1430
parent_pipe, self.child_pipe = multiprocessing.Pipe()
2409
1431
2410
proc = MultiprocessingMixIn.process_request(self, request,
2411
client_address)
1432
super(MultiprocessingMixInWithPipe,
1433
self).process_request(request, client_address)
2412
1434
self.child_pipe.close()
2413
self.add_pipe(parent_pipe, proc)
1435
self.add_pipe(parent_pipe)
2414
1436
2415
def add_pipe(self, parent_pipe, proc):
1437
def add_pipe(self, parent_pipe):
2416
1438
"""Dummy function; override as necessary"""
2417
raise NotImplementedError()
2418
1439
raise NotImplementedError
2419
1440
2420
1441
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
2421
1442
socketserver.TCPServer, object):
2422
1443
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
2423
1444
2424
1445
Attributes:
2425
1446
enabled: Boolean; whether this server is activated yet
2426
1447
interface: None or a network interface name (string)
2427
1448
use_ipv6: Boolean; to use IPv6 or not
2428
1449
"""
2429
2430
1450
def __init__(self, server_address, RequestHandlerClass,
2431
interface=None,
2432
use_ipv6=True,
2433
socketfd=None):
2434
"""If socketfd is set, use that file descriptor instead of
2435
creating a new one with socket.socket().
2436
"""
1451
interface=None, use_ipv6=True):
2437
1452
self.interface = interface
2438
1453
if use_ipv6:
2439
1454
self.address_family = socket.AF_INET6
2440
if socketfd is not None:
2441
# Save the file descriptor
2442
self.socketfd = socketfd
2443
# Save the original socket.socket() function
2444
self.socket_socket = socket.socket
2445
2446
# To implement --socket, we monkey patch socket.socket.
2447
#
2448
# (When socketserver.TCPServer is a new-style class, we
2449
# could make self.socket into a property instead of monkey
2450
# patching socket.socket.)
2451
#
2452
# Create a one-time-only replacement for socket.socket()
2453
@functools.wraps(socket.socket)
2454
def socket_wrapper(*args, **kwargs):
2455
# Restore original function so subsequent calls are
2456
# not affected.
2457
socket.socket = self.socket_socket
2458
del self.socket_socket
2459
# This time only, return a new socket object from the
2460
# saved file descriptor.
2461
return socket.fromfd(self.socketfd, *args, **kwargs)
2462
# Replace socket.socket() function with wrapper
2463
socket.socket = socket_wrapper
2464
# The socketserver.TCPServer.__init__ will call
2465
# socket.socket(), which might be our replacement,
2466
# socket_wrapper(), if socketfd was set.
2467
1455
socketserver.TCPServer.__init__(self, server_address,
2468
1456
RequestHandlerClass)
2469
2470
1457
def server_bind(self):
2471
1458
"""This overrides the normal server_bind() function
2472
1459
to bind to an interface if one was specified, and also NOT to
2473
1460
bind to an address or port if they were not specified."""
2474
global SO_BINDTODEVICE
2475
1461
if self.interface is not None:
2476
1462
if SO_BINDTODEVICE is None:
2477
# Fall back to a hard-coded value which seems to be
2478
# common enough.
2479
logger.warning("SO_BINDTODEVICE not found, trying 25")
2480
SO_BINDTODEVICE = 25
2481
try:
2482
self.socket.setsockopt(
2483
socket.SOL_SOCKET, SO_BINDTODEVICE,
2484
(self.interface + "\0").encode("utf-8"))
2485
except socket.error as error:
2486
if error.errno == errno.EPERM:
2487
logger.error("No permission to bind to"
2488
" interface %s", self.interface)
2489
elif error.errno == errno.ENOPROTOOPT:
2490
logger.error("SO_BINDTODEVICE not available;"
2491
" cannot bind to interface %s",
2492
self.interface)
2493
elif error.errno == errno.ENODEV:
2494
logger.error("Interface %s does not exist,"
2495
" cannot bind", self.interface)
2496
else:
2497
raise
1463
logger.error("SO_BINDTODEVICE does not exist;"
1464
" cannot bind to interface %s",
1465
self.interface)
1466
else:
1467
try:
1468
self.socket.setsockopt(socket.SOL_SOCKET,
1469
SO_BINDTODEVICE,
1470
str(self.interface
1471
+ '\0'))
1472
except socket.error as error:
1473
if error[0] == errno.EPERM:
1474
logger.error("No permission to"
1475
" bind to interface %s",
1476
self.interface)
1477
elif error[0] == errno.ENOPROTOOPT:
1478
logger.error("SO_BINDTODEVICE not available;"
1479
" cannot bind to interface %s",
1480
self.interface)
1481
else:
1482
raise
2498
1483
# Only bind(2) the socket if we really need to.
2499
1484
if self.server_address[0] or self.server_address[1]:
2500
1485
if not self.server_address[0]:
2501
1486
if self.address_family == socket.AF_INET6:
2502
any_address = "::" # in6addr_any
1487
any_address = "::" # in6addr_any
2503
1488
else:
2504
any_address = "0.0.0.0" # INADDR_ANY
1489
any_address = socket.INADDR_ANY
2505
1490
self.server_address = (any_address,
2506
1491
self.server_address[1])
2507
1492
elif not self.server_address[1]:
2508
self.server_address = (self.server_address[0], 0)
1493
self.server_address = (self.server_address[0],
1494
0)
2509
1495
# if self.interface:
2510
1496
# self.server_address = (self.server_address[0],
2511
1497
# 0, # port
2517
1503
2518
1504
class MandosServer(IPv6_TCPServer):
2519
1505
"""Mandos server.
2520
1506
2521
1507
Attributes:
2522
1508
clients: set of Client objects
2523
1509
gnutls_priority GnuTLS priority string
2524
1510
use_dbus: Boolean; to emit D-Bus signals or not
2525
2526
Assumes a GLib.MainLoop event loop.
1511
1512
Assumes a gobject.MainLoop event loop.
2527
1513
"""
2528
2529
1514
def __init__(self, server_address, RequestHandlerClass,
2530
interface=None,
2531
use_ipv6=True,
2532
clients=None,
2533
gnutls_priority=None,
2534
use_dbus=True,
2535
socketfd=None):
1515
interface=None, use_ipv6=True, clients=None,
1516
gnutls_priority=None, use_dbus=True):
2536
1517
self.enabled = False
2537
1518
self.clients = clients
2538
1519
if self.clients is None:
2539
self.clients = {}
1520
self.clients = set()
2540
1521
self.use_dbus = use_dbus
2541
1522
self.gnutls_priority = gnutls_priority
2542
1523
IPv6_TCPServer.__init__(self, server_address,
2543
1524
RequestHandlerClass,
2544
interface=interface,
2545
use_ipv6=use_ipv6,
2546
socketfd=socketfd)
2547
1525
interface = interface,
1526
use_ipv6 = use_ipv6)
2548
1527
def server_activate(self):
2549
1528
if self.enabled:
2550
1529
return socketserver.TCPServer.server_activate(self)
2551
2552
1530
def enable(self):
2553
1531
self.enabled = True
2554
2555
def add_pipe(self, parent_pipe, proc):
1532
def add_pipe(self, parent_pipe):
2556
1533
# Call "handle_ipc" for both data and EOF events
2557
GLib.io_add_watch(
2558
parent_pipe.fileno(),
2559
GLib.IO_IN | GLib.IO_HUP,
2560
functools.partial(self.handle_ipc,
2561
parent_pipe=parent_pipe,
2562
proc=proc))
2563
2564
def handle_ipc(self, source, condition,
2565
parent_pipe=None,
2566
proc=None,
1534
gobject.io_add_watch(parent_pipe.fileno(),
1535
gobject.IO_IN | gobject.IO_HUP,
1536
functools.partial(self.handle_ipc,
1537
parent_pipe = parent_pipe))
1538
1539
def handle_ipc(self, source, condition, parent_pipe=None,
2567
1540
client_object=None):
2568
# error, or the other end of multiprocessing.Pipe has closed
2569
if condition & (GLib.IO_ERR | GLib.IO_HUP):
2570
# Wait for other process to exit
2571
proc.join()
1541
condition_names = {
1542
gobject.IO_IN: "IN", # There is data to read.
1543
gobject.IO_OUT: "OUT", # Data can be written (without
1544
# blocking).
1545
gobject.IO_PRI: "PRI", # There is urgent data to read.
1546
gobject.IO_ERR: "ERR", # Error condition.
1547
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1548
# broken, usually for pipes and
1549
# sockets).
1550
}
1551
conditions_string = ' | '.join(name
1552
for cond, name in
1553
condition_names.iteritems()
1554
if cond & condition)
1555
# error or the other end of multiprocessing.Pipe has closed
1556
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
2572
1557
return False
2573
1558
2574
1559
# Read a request from the child
2575
1560
request = parent_pipe.recv()
2576
1561
command = request[0]
2577
1562
2578
1563
if command == 'init':
2579
1564
fpr = request[1]
2580
1565
address = request[2]
2581
2582
for c in self.clients.values():
1566
1567
for c in self.clients:
2583
1568
if c.fingerprint == fpr:
2584
1569
client = c
2585
1570
break
2588
1573
"dress: %s", fpr, address)
2589
1574
if self.use_dbus:
2590
1575
# Emit D-Bus signal
2591
mandos_dbus_service.ClientNotFound(fpr,
2592
address[0])
1576
mandos_dbus_service.ClientNotFound(fpr, address[0])
2593
1577
parent_pipe.send(False)
2594
1578
return False
2595
2596
GLib.io_add_watch(
2597
parent_pipe.fileno(),
2598
GLib.IO_IN | GLib.IO_HUP,
2599
functools.partial(self.handle_ipc,
2600
parent_pipe=parent_pipe,
2601
proc=proc,
2602
client_object=client))
1579
1580
gobject.io_add_watch(parent_pipe.fileno(),
1581
gobject.IO_IN | gobject.IO_HUP,
1582
functools.partial(self.handle_ipc,
1583
parent_pipe = parent_pipe,
1584
client_object = client))
2603
1585
parent_pipe.send(True)
2604
# remove the old hook in favor of the new above hook on
2605
# same fileno
1586
# remove the old hook in favor of the new above hook on same fileno
2606
1587
return False
2607
1588
if command == 'funcall':
2608
1589
funcname = request[1]
2609
1590
args = request[2]
2610
1591
kwargs = request[3]
2611
2612
parent_pipe.send(('data', getattr(client_object,
2613
funcname)(*args,
2614
**kwargs)))
1592
1593
parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))
2615
1594
2616
1595
if command == 'getattr':
2617
1596
attrname = request[1]
2618
if isinstance(client_object.__getattribute__(attrname),
2619
collections.Callable):
2620
parent_pipe.send(('function', ))
1597
if callable(client_object.__getattribute__(attrname)):
1598
parent_pipe.send(('function',))
2621
1599
else:
2622
parent_pipe.send((
2623
'data', client_object.__getattribute__(attrname)))
2624
1600
parent_pipe.send(('data', client_object.__getattribute__(attrname)))
1601
2625
1602
if command == 'setattr':
2626
1603
attrname = request[1]
2627
1604
value = request[2]
2630
1607
return True
2631
1608
2632
1609
2633
def rfc3339_duration_to_delta(duration):
2634
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2635
2636
>>> rfc3339_duration_to_delta("P7D")
2637
datetime.timedelta(7)
2638
>>> rfc3339_duration_to_delta("PT60S")
2639
datetime.timedelta(0, 60)
2640
>>> rfc3339_duration_to_delta("PT60M")
2641
datetime.timedelta(0, 3600)
2642
>>> rfc3339_duration_to_delta("PT24H")
2643
datetime.timedelta(1)
2644
>>> rfc3339_duration_to_delta("P1W")
2645
datetime.timedelta(7)
2646
>>> rfc3339_duration_to_delta("PT5M30S")
2647
datetime.timedelta(0, 330)
2648
>>> rfc3339_duration_to_delta("P1DT3M20S")
2649
datetime.timedelta(1, 200)
2650
"""
2651
2652
# Parsing an RFC 3339 duration with regular expressions is not
2653
# possible - there would have to be multiple places for the same
2654
# values, like seconds. The current code, while more esoteric, is
2655
# cleaner without depending on a parsing library. If Python had a
2656
# built-in library for parsing we would use it, but we'd like to
2657
# avoid excessive use of external libraries.
2658
2659
# New type for defining tokens, syntax, and semantics all-in-one
2660
Token = collections.namedtuple("Token", (
2661
"regexp", # To match token; if "value" is not None, must have
2662
# a "group" containing digits
2663
"value", # datetime.timedelta or None
2664
"followers")) # Tokens valid after this token
2665
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2666
# the "duration" ABNF definition in RFC 3339, Appendix A.
2667
token_end = Token(re.compile(r"$"), None, frozenset())
2668
token_second = Token(re.compile(r"(\d+)S"),
2669
datetime.timedelta(seconds=1),
2670
frozenset((token_end, )))
2671
token_minute = Token(re.compile(r"(\d+)M"),
2672
datetime.timedelta(minutes=1),
2673
frozenset((token_second, token_end)))
2674
token_hour = Token(re.compile(r"(\d+)H"),
2675
datetime.timedelta(hours=1),
2676
frozenset((token_minute, token_end)))
2677
token_time = Token(re.compile(r"T"),
2678
None,
2679
frozenset((token_hour, token_minute,
2680
token_second)))
2681
token_day = Token(re.compile(r"(\d+)D"),
2682
datetime.timedelta(days=1),
2683
frozenset((token_time, token_end)))
2684
token_month = Token(re.compile(r"(\d+)M"),
2685
datetime.timedelta(weeks=4),
2686
frozenset((token_day, token_end)))
2687
token_year = Token(re.compile(r"(\d+)Y"),
2688
datetime.timedelta(weeks=52),
2689
frozenset((token_month, token_end)))
2690
token_week = Token(re.compile(r"(\d+)W"),
2691
datetime.timedelta(weeks=1),
2692
frozenset((token_end, )))
2693
token_duration = Token(re.compile(r"P"), None,
2694
frozenset((token_year, token_month,
2695
token_day, token_time,
2696
token_week)))
2697
# Define starting values:
2698
# Value so far
2699
value = datetime.timedelta()
2700
found_token = None
2701
# Following valid tokens
2702
followers = frozenset((token_duration, ))
2703
# String left to parse
2704
s = duration
2705
# Loop until end token is found
2706
while found_token is not token_end:
2707
# Search for any currently valid tokens
2708
for token in followers:
2709
match = token.regexp.match(s)
2710
if match is not None:
2711
# Token found
2712
if token.value is not None:
2713
# Value found, parse digits
2714
factor = int(match.group(1), 10)
2715
# Add to value so far
2716
value += factor * token.value
2717
# Strip token from string
2718
s = token.regexp.sub("", s, 1)
2719
# Go to found token
2720
found_token = token
2721
# Set valid next tokens
2722
followers = found_token.followers
2723
break
2724
else:
2725
# No currently valid tokens were found
2726
raise ValueError("Invalid RFC 3339 duration: {!r}"
2727
.format(duration))
2728
# End token found
2729
return value
2730
2731
2732
1610
def string_to_delta(interval):
2733
1611
"""Parse a string and return a datetime.timedelta
2734
1612
2735
1613
>>> string_to_delta('7d')
2736
1614
datetime.timedelta(7)
2737
1615
>>> string_to_delta('60s')
2745
1623
>>> string_to_delta('5m 30s')
2746
1624
datetime.timedelta(0, 330)
2747
1625
"""
2748
2749
try:
2750
return rfc3339_duration_to_delta(interval)
2751
except ValueError:
2752
pass
2753
2754
1626
timevalue = datetime.timedelta(0)
2755
1627
for s in interval.split():
2756
1628
try:
2757
suffix = s[-1]
1629
suffix = unicode(s[-1])
2758
1630
value = int(s[:-1])
2759
1631
if suffix == "d":
2760
1632
delta = datetime.timedelta(value)
2767
1639
elif suffix == "w":
2768
1640
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
2769
1641
else:
2770
raise ValueError("Unknown suffix {!r}".format(suffix))
2771
except IndexError as e:
1642
raise ValueError("Unknown suffix %r" % suffix)
1643
except (ValueError, IndexError) as e:
2772
1644
raise ValueError(*(e.args))
2773
1645
timevalue += delta
2774
1646
return timevalue
2775
1647
2776
1648
2777
def daemon(nochdir=False, noclose=False):
1649
def if_nametoindex(interface):
1650
"""Call the C function if_nametoindex(), or equivalent
1651
1652
Note: This function cannot accept a unicode string."""
1653
global if_nametoindex
1654
try:
1655
if_nametoindex = (ctypes.cdll.LoadLibrary
1656
(ctypes.util.find_library("c"))
1657
.if_nametoindex)
1658
except (OSError, AttributeError):
1659
logger.warning("Doing if_nametoindex the hard way")
1660
def if_nametoindex(interface):
1661
"Get an interface index the hard way, i.e. using fcntl()"
1662
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1663
with contextlib.closing(socket.socket()) as s:
1664
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1665
struct.pack(str("16s16x"),
1666
interface))
1667
interface_index = struct.unpack(str("I"),
1668
ifreq[16:20])[0]
1669
return interface_index
1670
return if_nametoindex(interface)
1671
1672
1673
def daemon(nochdir = False, noclose = False):
2778
1674
"""See daemon(3). Standard BSD Unix function.
2779
1675
2780
1676
This should really exist as os.daemon, but it doesn't (yet)."""
2781
1677
if os.fork():
2782
1678
sys.exit()
2787
1683
sys.exit()
2788
1684
if not noclose:
2789
1685
# Close all standard open file descriptors
2790
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1686
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2791
1687
if not stat.S_ISCHR(os.fstat(null).st_mode):
2792
1688
raise OSError(errno.ENODEV,
2793
"{} not a character device"
2794
.format(os.devnull))
1689
"%s not a character device"
1690
% os.path.devnull)
2795
1691
os.dup2(null, sys.stdin.fileno())
2796
1692
os.dup2(null, sys.stdout.fileno())
2797
1693
os.dup2(null, sys.stderr.fileno())
2800
1696
2801
1697
2802
1698
def main():
2803
1699
2804
1700
##################################################################
2805
1701
# Parsing of options, both command line and config file
2806
1702
2807
1703
parser = argparse.ArgumentParser()
2808
1704
parser.add_argument("-v", "--version", action="version",
2809
version="%(prog)s {}".format(version),
1705
version = "%%(prog)s %s" % version,
2810
1706
help="show version number and exit")
2811
1707
parser.add_argument("-i", "--interface", metavar="IF",
2812
1708
help="Bind to interface IF")
2818
1714
help="Run self-test")
2819
1715
parser.add_argument("--debug", action="store_true",
2820
1716
help="Debug mode; run in foreground and log"
2821
" to terminal", default=None)
1717
" to terminal")
2822
1718
parser.add_argument("--debuglevel", metavar="LEVEL",
2823
1719
help="Debug level for stdout output")
2824
1720
parser.add_argument("--priority", help="GnuTLS"
2831
1727
" files")
2832
1728
parser.add_argument("--no-dbus", action="store_false",
2833
1729
dest="use_dbus", help="Do not provide D-Bus"
2834
" system bus interface", default=None)
1730
" system bus interface")
2835
1731
parser.add_argument("--no-ipv6", action="store_false",
2836
dest="use_ipv6", help="Do not use IPv6",
2837
default=None)
2838
parser.add_argument("--no-restore", action="store_false",
2839
dest="restore", help="Do not restore stored"
2840
" state", default=None)
2841
parser.add_argument("--socket", type=int,
2842
help="Specify a file descriptor to a network"
2843
" socket to use instead of creating one")
2844
parser.add_argument("--statedir", metavar="DIR",
2845
help="Directory to save/restore state in")
2846
parser.add_argument("--foreground", action="store_true",
2847
help="Run in foreground", default=None)
2848
parser.add_argument("--no-zeroconf", action="store_false",
2849
dest="zeroconf", help="Do not use Zeroconf",
2850
default=None)
2851
1732
dest="use_ipv6", help="Do not use IPv6")
2852
1733
options = parser.parse_args()
2853
1734
2854
1735
if options.check:
2855
1736
import doctest
2856
fail_count, test_count = doctest.testmod()
2857
sys.exit(os.EX_OK if fail_count == 0 else 1)
2858
1737
doctest.testmod()
1738
sys.exit()
1739
2859
1740
# Default values for config file for server-global settings
2860
server_defaults = {"interface": "",
2861
"address": "",
2862
"port": "",
2863
"debug": "False",
2864
"priority":
2865
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2866
":+SIGN-DSA-SHA256",
2867
"servicename": "Mandos",
2868
"use_dbus": "True",
2869
"use_ipv6": "True",
2870
"debuglevel": "",
2871
"restore": "True",
2872
"socket": "",
2873
"statedir": "/var/lib/mandos",
2874
"foreground": "False",
2875
"zeroconf": "True",
2876
}
2877
1741
server_defaults = { "interface": "",
1742
"address": "",
1743
"port": "",
1744
"debug": "False",
1745
"priority":
1746
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1747
"servicename": "Mandos",
1748
"use_dbus": "True",
1749
"use_ipv6": "True",
1750
"debuglevel": "",
1751
}
1752
2878
1753
# Parse config file for server-global settings
2879
1754
server_config = configparser.SafeConfigParser(server_defaults)
2880
1755
del server_defaults
2881
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1756
server_config.read(os.path.join(options.configdir,
1757
"mandos.conf"))
2882
1758
# Convert the SafeConfigParser object to a dict
2883
1759
server_settings = server_config.defaults()
2884
1760
# Use the appropriate methods on the non-string config options
2885
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
1761
for option in ("debug", "use_dbus", "use_ipv6"):
2886
1762
server_settings[option] = server_config.getboolean("DEFAULT",
2887
1763
option)
2888
1764
if server_settings["port"]:
2889
1765
server_settings["port"] = server_config.getint("DEFAULT",
2890
1766
"port")
2891
if server_settings["socket"]:
2892
server_settings["socket"] = server_config.getint("DEFAULT",
2893
"socket")
2894
# Later, stdin will, and stdout and stderr might, be dup'ed
2895
# over with an opened os.devnull. But we don't want this to
2896
# happen with a supplied network socket.
2897
if 0 <= server_settings["socket"] <= 2:
2898
server_settings["socket"] = os.dup(server_settings
2899
["socket"])
2900
1767
del server_config
2901
1768
2902
1769
# Override the settings from the config file with command line
2903
1770
# options, if set.
2904
1771
for option in ("interface", "address", "port", "debug",
2905
"priority", "servicename", "configdir", "use_dbus",
2906
"use_ipv6", "debuglevel", "restore", "statedir",
2907
"socket", "foreground", "zeroconf"):
1772
"priority", "servicename", "configdir",
1773
"use_dbus", "use_ipv6", "debuglevel"):
2908
1774
value = getattr(options, option)
2909
1775
if value is not None:
2910
1776
server_settings[option] = value
2911
1777
del options
2912
1778
# Force all strings to be unicode
2913
1779
for option in server_settings.keys():
2914
if isinstance(server_settings[option], bytes):
2915
server_settings[option] = (server_settings[option]
2916
.decode("utf-8"))
2917
# Force all boolean options to be boolean
2918
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2919
"foreground", "zeroconf"):
2920
server_settings[option] = bool(server_settings[option])
2921
# Debug implies foreground
2922
if server_settings["debug"]:
2923
server_settings["foreground"] = True
1780
if type(server_settings[option]) is str:
1781
server_settings[option] = unicode(server_settings[option])
2924
1782
# Now we have our good server settings in "server_settings"
2925
1783
2926
1784
##################################################################
2927
2928
if (not server_settings["zeroconf"]
2929
and not (server_settings["port"]
2930
or server_settings["socket"] != "")):
2931
parser.error("Needs port or socket to work without Zeroconf")
2932
1785
2933
1786
# For convenience
2934
1787
debug = server_settings["debug"]
2935
1788
debuglevel = server_settings["debuglevel"]
2936
1789
use_dbus = server_settings["use_dbus"]
2937
1790
use_ipv6 = server_settings["use_ipv6"]
2938
stored_state_path = os.path.join(server_settings["statedir"],
2939
stored_state_file)
2940
foreground = server_settings["foreground"]
2941
zeroconf = server_settings["zeroconf"]
2942
2943
if debug:
2944
initlogger(debug, logging.DEBUG)
2945
else:
2946
if not debuglevel:
2947
initlogger(debug)
2948
else:
2949
level = getattr(logging, debuglevel.upper())
2950
initlogger(debug, level)
2951
1791
2952
1792
if server_settings["servicename"] != "Mandos":
2953
syslogger.setFormatter(
2954
logging.Formatter('Mandos ({}) [%(process)d]:'
2955
' %(levelname)s: %(message)s'.format(
2956
server_settings["servicename"])))
2957
1793
syslogger.setFormatter(logging.Formatter
1794
('Mandos (%s) [%%(process)d]:'
1795
' %%(levelname)s: %%(message)s'
1796
% server_settings["servicename"]))
1797
2958
1798
# Parse config file with clients
2959
client_config = configparser.SafeConfigParser(Client
2960
.client_defaults)
1799
client_defaults = { "timeout": "1h",
1800
"interval": "5m",
1801
"checker": "fping -q -- %%(host)s",
1802
"host": "",
1803
"approval_delay": "0s",
1804
"approval_duration": "1s",
1805
}
1806
client_config = configparser.SafeConfigParser(client_defaults)
2961
1807
client_config.read(os.path.join(server_settings["configdir"],
2962
1808
"clients.conf"))
2963
1809
2964
1810
global mandos_dbus_service
2965
1811
mandos_dbus_service = None
2966
2967
socketfd = None
2968
if server_settings["socket"] != "":
2969
socketfd = server_settings["socket"]
2970
tcp_server = MandosServer(
2971
(server_settings["address"], server_settings["port"]),
2972
ClientHandler,
2973
interface=(server_settings["interface"] or None),
2974
use_ipv6=use_ipv6,
2975
gnutls_priority=server_settings["priority"],
2976
use_dbus=use_dbus,
2977
socketfd=socketfd)
2978
if not foreground:
2979
pidfilename = "/run/mandos.pid"
2980
if not os.path.isdir("/run/."):
2981
pidfilename = "/var/run/mandos.pid"
2982
pidfile = None
2983
try:
2984
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
2985
except IOError as e:
2986
logger.error("Could not open file %r", pidfilename,
2987
exc_info=e)
2988
2989
for name, group in (("_mandos", "_mandos"),
2990
("mandos", "mandos"),
2991
("nobody", "nogroup")):
2992
try:
2993
uid = pwd.getpwnam(name).pw_uid
2994
gid = pwd.getpwnam(group).pw_gid
2995
break
1812
1813
tcp_server = MandosServer((server_settings["address"],
1814
server_settings["port"]),
1815
ClientHandler,
1816
interface=(server_settings["interface"]
1817
or None),
1818
use_ipv6=use_ipv6,
1819
gnutls_priority=
1820
server_settings["priority"],
1821
use_dbus=use_dbus)
1822
if not debug:
1823
pidfilename = "/var/run/mandos.pid"
1824
try:
1825
pidfile = open(pidfilename, "w")
1826
except IOError:
1827
logger.error("Could not open file %r", pidfilename)
1828
1829
try:
1830
uid = pwd.getpwnam("_mandos").pw_uid
1831
gid = pwd.getpwnam("_mandos").pw_gid
1832
except KeyError:
1833
try:
1834
uid = pwd.getpwnam("mandos").pw_uid
1835
gid = pwd.getpwnam("mandos").pw_gid
2996
1836
except KeyError:
2997
continue
2998
else:
2999
uid = 65534
3000
gid = 65534
1837
try:
1838
uid = pwd.getpwnam("nobody").pw_uid
1839
gid = pwd.getpwnam("nobody").pw_gid
1840
except KeyError:
1841
uid = 65534
1842
gid = 65534
3001
1843
try:
3002
1844
os.setgid(gid)
3003
1845
os.setuid(uid)
3004
if debug:
3005
logger.debug("Did setuid/setgid to {}:{}".format(uid,
3006
gid))
3007
1846
except OSError as error:
3008
logger.warning("Failed to setuid/setgid to {}:{}: {}"
3009
.format(uid, gid, os.strerror(error.errno)))
3010
if error.errno != errno.EPERM:
3011
raise
1847
if error[0] != errno.EPERM:
1848
raise error
1849
1850
if not debug and not debuglevel:
1851
syslogger.setLevel(logging.WARNING)
1852
console.setLevel(logging.WARNING)
1853
if debuglevel:
1854
level = getattr(logging, debuglevel.upper())
1855
syslogger.setLevel(level)
1856
console.setLevel(level)
3012
1857
3013
1858
if debug:
3014
1859
# Enable all possible GnuTLS debugging
3015
1860
3016
1861
# "Use a log level over 10 to enable all debugging options."
3017
1862
# - GnuTLS manual
3018
gnutls.global_set_log_level(11)
3019
3020
@gnutls.log_func
1863
gnutls.library.functions.gnutls_global_set_log_level(11)
1864
1865
@gnutls.library.types.gnutls_log_func
3021
1866
def debug_gnutls(level, string):
3022
1867
logger.debug("GnuTLS: %s", string[:-1])
3023
3024
gnutls.global_set_log_function(debug_gnutls)
3025
1868
1869
(gnutls.library.functions
1870
.gnutls_global_set_log_function(debug_gnutls))
1871
3026
1872
# Redirect stdin so all checkers get /dev/null
3027
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1873
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
3028
1874
os.dup2(null, sys.stdin.fileno())
3029
1875
if null > 2:
3030
1876
os.close(null)
3031
1877
else:
1878
# No console logging
1879
logger.removeHandler(console)
1880
3032
1881
# Need to fork before connecting to D-Bus
3033
if not foreground:
1882
if not debug:
3034
1883
# Close all input and output, do double fork, etc.
3035
1884
daemon()
3036
3037
# multiprocessing will use threads, so before we use GLib we need
3038
# to inform GLib that threads will be used.
3039
GLib.threads_init()
3040
1885
3041
1886
global main_loop
3042
1887
# From the Avahi example code
3043
DBusGMainLoop(set_as_default=True)
3044
main_loop = GLib.MainLoop()
1888
DBusGMainLoop(set_as_default=True )
1889
main_loop = gobject.MainLoop()
3045
1890
bus = dbus.SystemBus()
3046
1891
# End of Avahi example code
3047
1892
if use_dbus:
3048
1893
try:
3049
bus_name = dbus.service.BusName("se.recompile.Mandos",
3050
bus,
3051
do_not_queue=True)
3052
old_bus_name = dbus.service.BusName(
3053
"se.bsnet.fukt.Mandos", bus,
3054
do_not_queue=True)
3055
except dbus.exceptions.DBusException as e:
3056
logger.error("Disabling D-Bus:", exc_info=e)
1894
bus_name = dbus.service.BusName("se.bsnet.fukt.Mandos",
1895
bus, do_not_queue=True)
1896
except dbus.exceptions.NameExistsException as e:
1897
logger.error(unicode(e) + ", disabling D-Bus")
3057
1898
use_dbus = False
3058
1899
server_settings["use_dbus"] = False
3059
1900
tcp_server.use_dbus = False
3060
if zeroconf:
3061
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3062
service = AvahiServiceToSyslog(
3063
name=server_settings["servicename"],
3064
servicetype="_mandos._tcp",
3065
protocol=protocol,
3066
bus=bus)
3067
if server_settings["interface"]:
3068
service.interface = if_nametoindex(
3069
server_settings["interface"].encode("utf-8"))
3070
1901
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1902
service = AvahiService(name = server_settings["servicename"],
1903
servicetype = "_mandos._tcp",
1904
protocol = protocol, bus = bus)
1905
if server_settings["interface"]:
1906
service.interface = (if_nametoindex
1907
(str(server_settings["interface"])))
1908
3071
1909
global multiprocessing_manager
3072
1910
multiprocessing_manager = multiprocessing.Manager()
3073
1911
3074
1912
client_class = Client
3075
1913
if use_dbus:
3076
client_class = functools.partial(ClientDBus, bus=bus)
3077
3078
client_settings = Client.config_parser(client_config)
3079
old_client_settings = {}
3080
clients_data = {}
3081
3082
# This is used to redirect stdout and stderr for checker processes
3083
global wnull
3084
wnull = open(os.devnull, "w") # A writable /dev/null
3085
# Only used if server is running in foreground but not in debug
3086
# mode
3087
if debug or not foreground:
3088
wnull.close()
3089
3090
# Get client data and settings from last running state.
3091
if server_settings["restore"]:
3092
try:
3093
with open(stored_state_path, "rb") as stored_state:
3094
if sys.version_info.major == 2:
3095
clients_data, old_client_settings = pickle.load(
3096
stored_state)
3097
else:
3098
bytes_clients_data, bytes_old_client_settings = (
3099
pickle.load(stored_state, encoding="bytes"))
3100
# Fix bytes to strings
3101
# clients_data
3102
# .keys()
3103
clients_data = {(key.decode("utf-8")
3104
if isinstance(key, bytes)
3105
else key): value
3106
for key, value in
3107
bytes_clients_data.items()}
3108
del bytes_clients_data
3109
for key in clients_data:
3110
value = {(k.decode("utf-8")
3111
if isinstance(k, bytes) else k): v
3112
for k, v in
3113
clients_data[key].items()}
3114
clients_data[key] = value
3115
# .client_structure
3116
value["client_structure"] = [
3117
(s.decode("utf-8")
3118
if isinstance(s, bytes)
3119
else s) for s in
3120
value["client_structure"]]
3121
# .name & .host
3122
for k in ("name", "host"):
3123
if isinstance(value[k], bytes):
3124
value[k] = value[k].decode("utf-8")
3125
# old_client_settings
3126
# .keys()
3127
old_client_settings = {
3128
(key.decode("utf-8")
3129
if isinstance(key, bytes)
3130
else key): value
3131
for key, value in
3132
bytes_old_client_settings.items()}
3133
del bytes_old_client_settings
3134
# .host
3135
for value in old_client_settings.values():
3136
if isinstance(value["host"], bytes):
3137
value["host"] = (value["host"]
3138
.decode("utf-8"))
3139
os.remove(stored_state_path)
3140
except IOError as e:
3141
if e.errno == errno.ENOENT:
3142
logger.warning("Could not load persistent state:"
3143
" {}".format(os.strerror(e.errno)))
3144
else:
3145
logger.critical("Could not load persistent state:",
3146
exc_info=e)
3147
raise
3148
except EOFError as e:
3149
logger.warning("Could not load persistent state: "
3150
"EOFError:",
3151
exc_info=e)
3152
3153
with PGPEngine() as pgp:
3154
for client_name, client in clients_data.items():
3155
# Skip removed clients
3156
if client_name not in client_settings:
3157
continue
3158
3159
# Decide which value to use after restoring saved state.
3160
# We have three different values: Old config file,
3161
# new config file, and saved state.
3162
# New config value takes precedence if it differs from old
3163
# config value, otherwise use saved state.
3164
for name, value in client_settings[client_name].items():
3165
try:
3166
# For each value in new config, check if it
3167
# differs from the old config value (Except for
3168
# the "secret" attribute)
3169
if (name != "secret"
3170
and (value !=
3171
old_client_settings[client_name][name])):
3172
client[name] = value
3173
except KeyError:
3174
pass
3175
3176
# Clients who has passed its expire date can still be
3177
# enabled if its last checker was successful. A Client
3178
# whose checker succeeded before we stored its state is
3179
# assumed to have successfully run all checkers during
3180
# downtime.
3181
if client["enabled"]:
3182
if datetime.datetime.utcnow() >= client["expires"]:
3183
if not client["last_checked_ok"]:
3184
logger.warning(
3185
"disabling client {} - Client never "
3186
"performed a successful checker".format(
3187
client_name))
3188
client["enabled"] = False
3189
elif client["last_checker_status"] != 0:
3190
logger.warning(
3191
"disabling client {} - Client last"
3192
" checker failed with error code"
3193
" {}".format(
3194
client_name,
3195
client["last_checker_status"]))
3196
client["enabled"] = False
3197
else:
3198
client["expires"] = (
3199
datetime.datetime.utcnow()
3200
+ client["timeout"])
3201
logger.debug("Last checker succeeded,"
3202
" keeping {} enabled".format(
3203
client_name))
1914
client_class = functools.partial(ClientDBus, bus = bus)
1915
def client_config_items(config, section):
1916
special_settings = {
1917
"approved_by_default":
1918
lambda: config.getboolean(section,
1919
"approved_by_default"),
1920
}
1921
for name, value in config.items(section):
3204
1922
try:
3205
client["secret"] = pgp.decrypt(
3206
client["encrypted_secret"],
3207
client_settings[client_name]["secret"])
3208
except PGPError:
3209
# If decryption fails, we use secret from new settings
3210
logger.debug("Failed to decrypt {} old secret".format(
3211
client_name))
3212
client["secret"] = (client_settings[client_name]
3213
["secret"])
3214
3215
# Add/remove clients based on new changes made to config
3216
for client_name in (set(old_client_settings)
3217
- set(client_settings)):
3218
del clients_data[client_name]
3219
for client_name in (set(client_settings)
3220
- set(old_client_settings)):
3221
clients_data[client_name] = client_settings[client_name]
3222
3223
# Create all client objects
3224
for client_name, client in clients_data.items():
3225
tcp_server.clients[client_name] = client_class(
3226
name=client_name,
3227
settings=client,
3228
server_settings=server_settings)
3229
1923
yield (name, special_settings[name]())
1924
except KeyError:
1925
yield (name, value)
1926
1927
tcp_server.clients.update(set(
1928
client_class(name = section,
1929
config= dict(client_config_items(
1930
client_config, section)))
1931
for section in client_config.sections()))
3230
1932
if not tcp_server.clients:
3231
1933
logger.warning("No clients defined")
3232
3233
if not foreground:
3234
if pidfile is not None:
3235
pid = os.getpid()
3236
try:
3237
with pidfile:
3238
print(pid, file=pidfile)
3239
except IOError:
3240
logger.error("Could not write to file %r with PID %d",
3241
pidfilename, pid)
3242
del pidfile
1934
1935
if not debug:
1936
try:
1937
with pidfile:
1938
pid = os.getpid()
1939
pidfile.write(str(pid) + "\n".encode("utf-8"))
1940
del pidfile
1941
except IOError:
1942
logger.error("Could not write to file %r with PID %d",
1943
pidfilename, pid)
1944
except NameError:
1945
# "pidfile" was never created
1946
pass
3243
1947
del pidfilename
3244
3245
for termsig in (signal.SIGHUP, signal.SIGTERM):
3246
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3247
lambda: main_loop.quit() and False)
3248
1948
1949
signal.signal(signal.SIGINT, signal.SIG_IGN)
1950
1951
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1952
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1953
3249
1954
if use_dbus:
3250
3251
@alternate_dbus_interfaces(
3252
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3253
class MandosDBusService(DBusObjectWithObjectManager):
1955
class MandosDBusService(dbus.service.Object):
3254
1956
"""A D-Bus proxy object"""
3255
3256
1957
def __init__(self):
3257
1958
dbus.service.Object.__init__(self, bus, "/")
3258
3259
_interface = "se.recompile.Mandos"
3260
1959
_interface = "se.bsnet.fukt.Mandos"
1960
3261
1961
@dbus.service.signal(_interface, signature="o")
3262
1962
def ClientAdded(self, objpath):
3263
1963
"D-Bus signal"
3264
1964
pass
3265
1965
3266
1966
@dbus.service.signal(_interface, signature="ss")
3267
1967
def ClientNotFound(self, fingerprint, address):
3268
1968
"D-Bus signal"
3269
1969
pass
3270
3271
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3272
"true"})
1970
3273
1971
@dbus.service.signal(_interface, signature="os")
3274
1972
def ClientRemoved(self, objpath, name):
3275
1973
"D-Bus signal"
3276
1974
pass
3277
3278
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3279
"true"})
1975
3280
1976
@dbus.service.method(_interface, out_signature="ao")
3281
1977
def GetAllClients(self):
3282
1978
"D-Bus method"
3283
return dbus.Array(c.dbus_object_path for c in
3284
tcp_server.clients.values())
3285
3286
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3287
"true"})
1979
return dbus.Array(c.dbus_object_path
1980
for c in tcp_server.clients)
1981
3288
1982
@dbus.service.method(_interface,
3289
1983
out_signature="a{oa{sv}}")
3290
1984
def GetAllClientsWithProperties(self):
3291
1985
"D-Bus method"
3292
1986
return dbus.Dictionary(
3293
{c.dbus_object_path: c.GetAll(
3294
"se.recompile.Mandos.Client")
3295
for c in tcp_server.clients.values()},
1987
((c.dbus_object_path, c.GetAll(""))
1988
for c in tcp_server.clients),
3296
1989
signature="oa{sv}")
3297
1990
3298
1991
@dbus.service.method(_interface, in_signature="o")
3299
1992
def RemoveClient(self, object_path):
3300
1993
"D-Bus method"
3301
for c in tcp_server.clients.values():
1994
for c in tcp_server.clients:
3302
1995
if c.dbus_object_path == object_path:
3303
del tcp_server.clients[c.name]
1996
tcp_server.clients.remove(c)
3304
1997
c.remove_from_connection()
3305
# Don't signal the disabling
1998
# Don't signal anything except ClientRemoved
3306
1999
c.disable(quiet=True)
3307
# Emit D-Bus signal for removal
3308
self.client_removed_signal(c)
2000
# Emit D-Bus signal
2001
self.ClientRemoved(object_path, c.name)
3309
2002
return
3310
2003
raise KeyError(object_path)
3311
2004
3312
2005
del _interface
3313
3314
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3315
out_signature="a{oa{sa{sv}}}")
3316
def GetManagedObjects(self):
3317
"""D-Bus method"""
3318
return dbus.Dictionary(
3319
{client.dbus_object_path:
3320
dbus.Dictionary(
3321
{interface: client.GetAll(interface)
3322
for interface in
3323
client._get_all_interface_names()})
3324
for client in tcp_server.clients.values()})
3325
3326
def client_added_signal(self, client):
3327
"""Send the new standard signal and the old signal"""
3328
if use_dbus:
3329
# New standard signal
3330
self.InterfacesAdded(
3331
client.dbus_object_path,
3332
dbus.Dictionary(
3333
{interface: client.GetAll(interface)
3334
for interface in
3335
client._get_all_interface_names()}))
3336
# Old signal
3337
self.ClientAdded(client.dbus_object_path)
3338
3339
def client_removed_signal(self, client):
3340
"""Send the new standard signal and the old signal"""
3341
if use_dbus:
3342
# New standard signal
3343
self.InterfacesRemoved(
3344
client.dbus_object_path,
3345
client._get_all_interface_names())
3346
# Old signal
3347
self.ClientRemoved(client.dbus_object_path,
3348
client.name)
3349
2006
3350
2007
mandos_dbus_service = MandosDBusService()
3351
3352
# Save modules to variables to exempt the modules from being
3353
# unloaded before the function registered with atexit() is run.
3354
mp = multiprocessing
3355
wn = wnull
3356
2008
3357
2009
def cleanup():
3358
2010
"Cleanup function; run on exit"
3359
if zeroconf:
3360
service.cleanup()
3361
3362
mp.active_children()
3363
wn.close()
3364
if not (tcp_server.clients or client_settings):
3365
return
3366
3367
# Store client before exiting. Secrets are encrypted with key
3368
# based on what config file has. If config file is
3369
# removed/edited, old secret will thus be unrecovable.
3370
clients = {}
3371
with PGPEngine() as pgp:
3372
for client in tcp_server.clients.values():
3373
key = client_settings[client.name]["secret"]
3374
client.encrypted_secret = pgp.encrypt(client.secret,
3375
key)
3376
client_dict = {}
3377
3378
# A list of attributes that can not be pickled
3379
# + secret.
3380
exclude = {"bus", "changedstate", "secret",
3381
"checker", "server_settings"}
3382
for name, typ in inspect.getmembers(dbus.service
3383
.Object):
3384
exclude.add(name)
3385
3386
client_dict["encrypted_secret"] = (client
3387
.encrypted_secret)
3388
for attr in client.client_structure:
3389
if attr not in exclude:
3390
client_dict[attr] = getattr(client, attr)
3391
3392
clients[client.name] = client_dict
3393
del client_settings[client.name]["secret"]
3394
3395
try:
3396
with tempfile.NamedTemporaryFile(
3397
mode='wb',
3398
suffix=".pickle",
3399
prefix='clients-',
3400
dir=os.path.dirname(stored_state_path),
3401
delete=False) as stored_state:
3402
pickle.dump((clients, client_settings), stored_state,
3403
protocol=2)
3404
tempname = stored_state.name
3405
os.rename(tempname, stored_state_path)
3406
except (IOError, OSError) as e:
3407
if not debug:
3408
try:
3409
os.remove(tempname)
3410
except NameError:
3411
pass
3412
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
3413
logger.warning("Could not save persistent state: {}"
3414
.format(os.strerror(e.errno)))
3415
else:
3416
logger.warning("Could not save persistent state:",
3417
exc_info=e)
3418
raise
3419
3420
# Delete all clients, and settings from config
2011
service.cleanup()
2012
3421
2013
while tcp_server.clients:
3422
name, client = tcp_server.clients.popitem()
2014
client = tcp_server.clients.pop()
3423
2015
if use_dbus:
3424
2016
client.remove_from_connection()
3425
# Don't signal the disabling
2017
client.disable_hook = None
2018
# Don't signal anything except ClientRemoved
3426
2019
client.disable(quiet=True)
3427
# Emit D-Bus signal for removal
3428
2020
if use_dbus:
3429
mandos_dbus_service.client_removed_signal(client)
3430
client_settings.clear()
3431
2021
# Emit D-Bus signal
2022
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
2023
client.name)
2024
3432
2025
atexit.register(cleanup)
3433
3434
for client in tcp_server.clients.values():
2026
2027
for client in tcp_server.clients:
3435
2028
if use_dbus:
3436
# Emit D-Bus signal for adding
3437
mandos_dbus_service.client_added_signal(client)
3438
# Need to initiate checking of clients
3439
if client.enabled:
3440
client.init_checker()
3441
2029
# Emit D-Bus signal
2030
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2031
client.enable()
2032
3442
2033
tcp_server.enable()
3443
2034
tcp_server.server_activate()
3444
2035
3445
2036
# Find out what port we got
3446
if zeroconf:
3447
service.port = tcp_server.socket.getsockname()[1]
2037
service.port = tcp_server.socket.getsockname()[1]
3448
2038
if use_ipv6:
3449
2039
logger.info("Now listening on address %r, port %d,"
3450
" flowinfo %d, scope_id %d",
3451
*tcp_server.socket.getsockname())
2040
" flowinfo %d, scope_id %d"
2041
% tcp_server.socket.getsockname())
3452
2042
else: # IPv4
3453
logger.info("Now listening on address %r, port %d",
3454
*tcp_server.socket.getsockname())
3455
3456
# service.interface = tcp_server.socket.getsockname()[3]
3457
2043
logger.info("Now listening on address %r, port %d"
2044
% tcp_server.socket.getsockname())
2045
2046
#service.interface = tcp_server.socket.getsockname()[3]
2047
3458
2048
try:
3459
if zeroconf:
3460
# From the Avahi example code
3461
try:
3462
service.activate()
3463
except dbus.exceptions.DBusException as error:
3464
logger.critical("D-Bus Exception", exc_info=error)
3465
cleanup()
3466
sys.exit(1)
3467
# End of Avahi example code
3468
3469
GLib.io_add_watch(tcp_server.fileno(), GLib.IO_IN,
3470
lambda *args, **kwargs:
3471
(tcp_server.handle_request
3472
(*args[2:], **kwargs) or True))
3473
2049
# From the Avahi example code
2050
try:
2051
service.activate()
2052
except dbus.exceptions.DBusException as error:
2053
logger.critical("DBusException: %s", error)
2054
cleanup()
2055
sys.exit(1)
2056
# End of Avahi example code
2057
2058
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2059
lambda *args, **kwargs:
2060
(tcp_server.handle_request
2061
(*args[2:], **kwargs) or True))
2062
3474
2063
logger.debug("Starting main loop")
3475
2064
main_loop.run()
3476
2065
except AvahiError as error:
3477
logger.critical("Avahi Error", exc_info=error)
2066
logger.critical("AvahiError: %s", error)
3478
2067
cleanup()
3479
2068
sys.exit(1)
3480
2069
except KeyboardInterrupt:
3485
2074
# Must run before the D-Bus bus name gets deregistered
3486
2075
cleanup()
3487
2076
3488
3489
2077
if __name__ == '__main__':
3490
2078
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0