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- Committer: Teddy Hogeborn
- Date: 2011-09-26 19:36:18 UTC
- mfrom: (24.1.184 mandos)
- Revision ID: teddy@fukt.bsnet.se-20110926193618-vtj5c9hena1maixx
Merge from Björn
- files added:
- initramfs-tools-hook-conf
- files removed:
- bugs.xml
- debian/upstream
- network-hooks.d
- plugin-helpers
- files modified:
- .bzrignore
added
removed
mandos
1
1
#!/usr/bin/python
2
2
# -*- mode: python; coding: utf-8 -*-
3
#
3
#
4
4
# Mandos server - give out binary blobs to connecting clients.
5
#
5
#
6
6
# This program is partly derived from an example program for an Avahi
7
7
# service publisher, downloaded from
8
8
# <http://avahi.org/wiki/PythonPublishExample>. This includes the
9
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 © 2008-2018 Teddy Hogeborn
15
# Copyright © 2008-2018 Björn Påhlsson
16
#
17
# This file is part of Mandos.
18
#
19
# Mandos is free software: you can redistribute it and/or modify it
20
# under the terms of the GNU General Public License as published by
14
# Copyright © 2008-2011 Teddy Hogeborn
15
# Copyright © 2008-2011 Björn Påhlsson
16
#
17
# This program is free software: you can redistribute it and/or modify
18
# it under the terms of the GNU General Public License as published by
21
19
# the Free Software Foundation, either version 3 of the License, or
22
20
# (at your option) any later version.
23
21
#
24
# Mandos is distributed in the hope that it will be useful, but
25
# WITHOUT ANY WARRANTY; without even the implied warranty of
22
# This program is distributed in the hope that it will be useful,
23
# but WITHOUT ANY WARRANTY; without even the implied warranty of
26
24
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
27
25
# GNU General Public License for more details.
28
#
26
#
29
27
# You should have received a copy of the GNU General Public License
30
# along with Mandos. If not, see <http://www.gnu.org/licenses/>.
31
#
32
# Contact the authors at <mandos@recompile.se>.
33
#
28
# along with this program. If not, see
29
# <http://www.gnu.org/licenses/>.
30
#
31
# Contact the authors at <mandos@fukt.bsnet.se>.
32
#
34
33
35
34
from __future__ import (division, absolute_import, print_function,
36
35
unicode_literals)
37
36
38
try:
39
from future_builtins import *
40
except ImportError:
41
pass
42
43
try:
44
import SocketServer as socketserver
45
except ImportError:
46
import socketserver
37
import SocketServer as socketserver
47
38
import socket
48
39
import argparse
49
40
import datetime
50
41
import errno
51
try:
52
import ConfigParser as configparser
53
except ImportError:
54
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
55
49
import sys
56
50
import re
57
51
import os
66
60
import struct
67
61
import fcntl
68
62
import functools
69
try:
70
import cPickle as pickle
71
except ImportError:
72
import pickle
63
import cPickle as pickle
73
64
import multiprocessing
74
import types
75
import binascii
76
import tempfile
77
import itertools
78
import collections
79
import codecs
80
65
81
66
import dbus
82
67
import dbus.service
83
from gi.repository import GLib
68
import gobject
69
import avahi
84
70
from dbus.mainloop.glib import DBusGMainLoop
85
71
import ctypes
86
72
import ctypes.util
87
73
import xml.dom.minidom
88
74
import inspect
89
75
90
# Try to find the value of SO_BINDTODEVICE:
91
76
try:
92
# This is where SO_BINDTODEVICE is in Python 3.3 (or 3.4?) and
93
# newer, and it is also the most natural place for it:
94
77
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
95
78
except AttributeError:
96
79
try:
97
# This is where SO_BINDTODEVICE was up to and including Python
98
# 2.6, and also 3.2:
99
80
from IN import SO_BINDTODEVICE
100
81
except ImportError:
101
# In Python 2.7 it seems to have been removed entirely.
102
# Try running the C preprocessor:
103
try:
104
cc = subprocess.Popen(["cc", "--language=c", "-E",
105
"/dev/stdin"],
106
stdin=subprocess.PIPE,
107
stdout=subprocess.PIPE)
108
stdout = cc.communicate(
109
"#include <sys/socket.h>\nSO_BINDTODEVICE\n")[0]
110
SO_BINDTODEVICE = int(stdout.splitlines()[-1])
111
except (OSError, ValueError, IndexError):
112
# No value found
113
SO_BINDTODEVICE = None
114
115
if sys.version_info.major == 2:
116
str = unicode
117
118
version = "1.7.20"
119
stored_state_file = "clients.pickle"
120
121
logger = logging.getLogger()
122
syslogger = None
123
124
try:
125
if_nametoindex = ctypes.cdll.LoadLibrary(
126
ctypes.util.find_library("c")).if_nametoindex
127
except (OSError, AttributeError):
128
129
def if_nametoindex(interface):
130
"Get an interface index the hard way, i.e. using fcntl()"
131
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
132
with contextlib.closing(socket.socket()) as s:
133
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
134
struct.pack(b"16s16x", interface))
135
interface_index = struct.unpack("I", ifreq[16:20])[0]
136
return interface_index
137
138
139
def copy_function(func):
140
"""Make a copy of a function"""
141
if sys.version_info.major == 2:
142
return types.FunctionType(func.func_code,
143
func.func_globals,
144
func.func_name,
145
func.func_defaults,
146
func.func_closure)
147
else:
148
return types.FunctionType(func.__code__,
149
func.__globals__,
150
func.__name__,
151
func.__defaults__,
152
func.__closure__)
153
154
155
def initlogger(debug, level=logging.WARNING):
156
"""init logger and add loglevel"""
157
158
global syslogger
159
syslogger = (logging.handlers.SysLogHandler(
160
facility=logging.handlers.SysLogHandler.LOG_DAEMON,
161
address="/dev/log"))
162
syslogger.setFormatter(logging.Formatter
163
('Mandos [%(process)d]: %(levelname)s:'
164
' %(message)s'))
165
logger.addHandler(syslogger)
166
167
if debug:
168
console = logging.StreamHandler()
169
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
170
' [%(process)d]:'
171
' %(levelname)s:'
172
' %(message)s'))
173
logger.addHandler(console)
174
logger.setLevel(level)
175
176
177
class PGPError(Exception):
178
"""Exception if encryption/decryption fails"""
179
pass
180
181
182
class PGPEngine(object):
183
"""A simple class for OpenPGP symmetric encryption & decryption"""
184
185
def __init__(self):
186
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
187
self.gpg = "gpg"
188
try:
189
output = subprocess.check_output(["gpgconf"])
190
for line in output.splitlines():
191
name, text, path = line.split(b":")
192
if name == "gpg":
193
self.gpg = path
194
break
195
except OSError as e:
196
if e.errno != errno.ENOENT:
197
raise
198
self.gnupgargs = ['--batch',
199
'--homedir', self.tempdir,
200
'--force-mdc',
201
'--quiet']
202
# Only GPG version 1 has the --no-use-agent option.
203
if self.gpg == "gpg" or self.gpg.endswith("/gpg"):
204
self.gnupgargs.append("--no-use-agent")
205
206
def __enter__(self):
207
return self
208
209
def __exit__(self, exc_type, exc_value, traceback):
210
self._cleanup()
211
return False
212
213
def __del__(self):
214
self._cleanup()
215
216
def _cleanup(self):
217
if self.tempdir is not None:
218
# Delete contents of tempdir
219
for root, dirs, files in os.walk(self.tempdir,
220
topdown=False):
221
for filename in files:
222
os.remove(os.path.join(root, filename))
223
for dirname in dirs:
224
os.rmdir(os.path.join(root, dirname))
225
# Remove tempdir
226
os.rmdir(self.tempdir)
227
self.tempdir = None
228
229
def password_encode(self, password):
230
# Passphrase can not be empty and can not contain newlines or
231
# NUL bytes. So we prefix it and hex encode it.
232
encoded = b"mandos" + binascii.hexlify(password)
233
if len(encoded) > 2048:
234
# GnuPG can't handle long passwords, so encode differently
235
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
236
.replace(b"\n", b"\\n")
237
.replace(b"\0", b"\\x00"))
238
return encoded
239
240
def encrypt(self, data, password):
241
passphrase = self.password_encode(password)
242
with tempfile.NamedTemporaryFile(
243
dir=self.tempdir) as passfile:
244
passfile.write(passphrase)
245
passfile.flush()
246
proc = subprocess.Popen([self.gpg, '--symmetric',
247
'--passphrase-file',
248
passfile.name]
249
+ self.gnupgargs,
250
stdin=subprocess.PIPE,
251
stdout=subprocess.PIPE,
252
stderr=subprocess.PIPE)
253
ciphertext, err = proc.communicate(input=data)
254
if proc.returncode != 0:
255
raise PGPError(err)
256
return ciphertext
257
258
def decrypt(self, data, password):
259
passphrase = self.password_encode(password)
260
with tempfile.NamedTemporaryFile(
261
dir=self.tempdir) as passfile:
262
passfile.write(passphrase)
263
passfile.flush()
264
proc = subprocess.Popen([self.gpg, '--decrypt',
265
'--passphrase-file',
266
passfile.name]
267
+ self.gnupgargs,
268
stdin=subprocess.PIPE,
269
stdout=subprocess.PIPE,
270
stderr=subprocess.PIPE)
271
decrypted_plaintext, err = proc.communicate(input=data)
272
if proc.returncode != 0:
273
raise PGPError(err)
274
return decrypted_plaintext
275
276
277
# Pretend that we have an Avahi module
278
class Avahi(object):
279
"""This isn't so much a class as it is a module-like namespace.
280
It is instantiated once, and simulates having an Avahi module."""
281
IF_UNSPEC = -1 # avahi-common/address.h
282
PROTO_UNSPEC = -1 # avahi-common/address.h
283
PROTO_INET = 0 # avahi-common/address.h
284
PROTO_INET6 = 1 # avahi-common/address.h
285
DBUS_NAME = "org.freedesktop.Avahi"
286
DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"
287
DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"
288
DBUS_PATH_SERVER = "/"
289
290
def string_array_to_txt_array(self, t):
291
return dbus.Array((dbus.ByteArray(s.encode("utf-8"))
292
for s in t), signature="ay")
293
ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h
294
ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h
295
ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h
296
SERVER_INVALID = 0 # avahi-common/defs.h
297
SERVER_REGISTERING = 1 # avahi-common/defs.h
298
SERVER_RUNNING = 2 # avahi-common/defs.h
299
SERVER_COLLISION = 3 # avahi-common/defs.h
300
SERVER_FAILURE = 4 # avahi-common/defs.h
301
avahi = Avahi()
302
82
SO_BINDTODEVICE = None
83
84
85
version = "1.3.1"
86
87
#logger = logging.getLogger('mandos')
88
logger = logging.Logger('mandos')
89
syslogger = (logging.handlers.SysLogHandler
90
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
91
address = str("/dev/log")))
92
syslogger.setFormatter(logging.Formatter
93
('Mandos [%(process)d]: %(levelname)s:'
94
' %(message)s'))
95
logger.addHandler(syslogger)
96
97
console = logging.StreamHandler()
98
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
99
' %(levelname)s:'
100
' %(message)s'))
101
logger.addHandler(console)
303
102
304
103
class AvahiError(Exception):
305
104
def __init__(self, value, *args, **kwargs):
306
105
self.value = value
307
return super(AvahiError, self).__init__(value, *args,
308
**kwargs)
309
106
super(AvahiError, self).__init__(value, *args, **kwargs)
107
def __unicode__(self):
108
return unicode(repr(self.value))
310
109
311
110
class AvahiServiceError(AvahiError):
312
111
pass
313
112
314
315
113
class AvahiGroupError(AvahiError):
316
114
pass
317
115
318
116
319
117
class AvahiService(object):
320
118
"""An Avahi (Zeroconf) service.
321
119
322
120
Attributes:
323
121
interface: integer; avahi.IF_UNSPEC or an interface index.
324
122
Used to optionally bind to the specified interface.
325
123
name: string; Example: 'Mandos'
326
124
type: string; Example: '_mandos._tcp'.
327
See <https://www.iana.org/assignments/service-names-port-numbers>
125
See <http://www.dns-sd.org/ServiceTypes.html>
328
126
port: integer; what port to announce
329
127
TXT: list of strings; TXT record for the service
330
128
domain: string; Domain to publish on, default to .local if empty.
336
134
server: D-Bus Server
337
135
bus: dbus.SystemBus()
338
136
"""
339
340
def __init__(self,
341
interface=avahi.IF_UNSPEC,
342
name=None,
343
servicetype=None,
344
port=None,
345
TXT=None,
346
domain="",
347
host="",
348
max_renames=32768,
349
protocol=avahi.PROTO_UNSPEC,
350
bus=None):
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):
351
141
self.interface = interface
352
142
self.name = name
353
143
self.type = servicetype
362
152
self.server = None
363
153
self.bus = bus
364
154
self.entry_group_state_changed_match = None
365
366
def rename(self, remove=True):
155
def rename(self):
367
156
"""Derived from the Avahi example code"""
368
157
if self.rename_count >= self.max_renames:
369
158
logger.critical("No suitable Zeroconf service name found"
370
159
" after %i retries, exiting.",
371
160
self.rename_count)
372
161
raise AvahiServiceError("Too many renames")
373
self.name = str(
374
self.server.GetAlternativeServiceName(self.name))
375
self.rename_count += 1
162
self.name = unicode(self.server.GetAlternativeServiceName(self.name))
376
163
logger.info("Changing Zeroconf service name to %r ...",
377
164
self.name)
378
if remove:
379
self.remove()
165
syslogger.setFormatter(logging.Formatter
166
('Mandos (%s) [%%(process)d]:'
167
' %%(levelname)s: %%(message)s'
168
% self.name))
169
self.remove()
380
170
try:
381
171
self.add()
382
172
except dbus.exceptions.DBusException as error:
383
if (error.get_dbus_name()
384
== "org.freedesktop.Avahi.CollisionError"):
385
logger.info("Local Zeroconf service name collision.")
386
return self.rename(remove=False)
387
else:
388
logger.critical("D-Bus Exception", exc_info=error)
389
self.cleanup()
390
os._exit(1)
391
173
logger.critical("DBusException: %s", error)
174
self.cleanup()
175
os._exit(1)
176
self.rename_count += 1
392
177
def remove(self):
393
178
"""Derived from the Avahi example code"""
394
179
if self.entry_group_state_changed_match is not None:
396
181
self.entry_group_state_changed_match = None
397
182
if self.group is not None:
398
183
self.group.Reset()
399
400
184
def add(self):
401
185
"""Derived from the Avahi example code"""
402
186
self.remove()
407
191
avahi.DBUS_INTERFACE_ENTRY_GROUP)
408
192
self.entry_group_state_changed_match = (
409
193
self.group.connect_to_signal(
410
'StateChanged', self.entry_group_state_changed))
194
'StateChanged', self .entry_group_state_changed))
411
195
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
412
196
self.name, self.type)
413
197
self.group.AddService(
419
203
dbus.UInt16(self.port),
420
204
avahi.string_array_to_txt_array(self.TXT))
421
205
self.group.Commit()
422
423
206
def entry_group_state_changed(self, state, error):
424
207
"""Derived from the Avahi example code"""
425
208
logger.debug("Avahi entry group state change: %i", state)
426
209
427
210
if state == avahi.ENTRY_GROUP_ESTABLISHED:
428
211
logger.debug("Zeroconf service established.")
429
212
elif state == avahi.ENTRY_GROUP_COLLISION:
431
214
self.rename()
432
215
elif state == avahi.ENTRY_GROUP_FAILURE:
433
216
logger.critical("Avahi: Error in group state changed %s",
434
str(error))
435
raise AvahiGroupError("State changed: {!s}".format(error))
436
217
unicode(error))
218
raise AvahiGroupError("State changed: %s"
219
% unicode(error))
437
220
def cleanup(self):
438
221
"""Derived from the Avahi example code"""
439
222
if self.group is not None:
440
223
try:
441
224
self.group.Free()
442
225
except (dbus.exceptions.UnknownMethodException,
443
dbus.exceptions.DBusException):
226
dbus.exceptions.DBusException) as e:
444
227
pass
445
228
self.group = None
446
229
self.remove()
447
448
230
def server_state_changed(self, state, error=None):
449
231
"""Derived from the Avahi example code"""
450
232
logger.debug("Avahi server state change: %i", state)
451
bad_states = {
452
avahi.SERVER_INVALID: "Zeroconf server invalid",
453
avahi.SERVER_REGISTERING: None,
454
avahi.SERVER_COLLISION: "Zeroconf server name collision",
455
avahi.SERVER_FAILURE: "Zeroconf server failure",
456
}
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" }
457
240
if state in bad_states:
458
241
if bad_states[state] is not None:
459
242
if error is None:
462
245
logger.error(bad_states[state] + ": %r", error)
463
246
self.cleanup()
464
247
elif state == avahi.SERVER_RUNNING:
465
try:
466
self.add()
467
except dbus.exceptions.DBusException as error:
468
if (error.get_dbus_name()
469
== "org.freedesktop.Avahi.CollisionError"):
470
logger.info("Local Zeroconf service name"
471
" collision.")
472
return self.rename(remove=False)
473
else:
474
logger.critical("D-Bus Exception", exc_info=error)
475
self.cleanup()
476
os._exit(1)
248
self.add()
477
249
else:
478
250
if error is None:
479
251
logger.debug("Unknown state: %r", state)
480
252
else:
481
253
logger.debug("Unknown state: %r: %r", state, error)
482
483
254
def activate(self):
484
255
"""Derived from the Avahi example code"""
485
256
if self.server is None:
489
260
follow_name_owner_changes=True),
490
261
avahi.DBUS_INTERFACE_SERVER)
491
262
self.server.connect_to_signal("StateChanged",
492
self.server_state_changed)
263
self.server_state_changed)
493
264
self.server_state_changed(self.server.GetState())
494
265
495
266
496
class AvahiServiceToSyslog(AvahiService):
497
def rename(self, *args, **kwargs):
498
"""Add the new name to the syslog messages"""
499
ret = super(AvahiServiceToSyslog, self).rename(*args, **kwargs)
500
syslogger.setFormatter(logging.Formatter(
501
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
502
.format(self.name)))
503
return ret
504
505
506
# Pretend that we have a GnuTLS module
507
class GnuTLS(object):
508
"""This isn't so much a class as it is a module-like namespace.
509
It is instantiated once, and simulates having a GnuTLS module."""
510
511
library = ctypes.util.find_library("gnutls")
512
if library is None:
513
library = ctypes.util.find_library("gnutls-deb0")
514
_library = ctypes.cdll.LoadLibrary(library)
515
del library
516
_need_version = b"3.3.0"
517
_tls_rawpk_version = b"3.6.6"
518
519
def __init__(self):
520
# Need to use "self" here, since this method is called before
521
# the assignment to the "gnutls" global variable happens.
522
if self.check_version(self._need_version) is None:
523
raise self.Error("Needs GnuTLS {} or later"
524
.format(self._need_version))
525
526
# Unless otherwise indicated, the constants and types below are
527
# all from the gnutls/gnutls.h C header file.
528
529
# Constants
530
E_SUCCESS = 0
531
E_INTERRUPTED = -52
532
E_AGAIN = -28
533
CRT_OPENPGP = 2
534
CRT_RAWPK = 3
535
CLIENT = 2
536
SHUT_RDWR = 0
537
CRD_CERTIFICATE = 1
538
E_NO_CERTIFICATE_FOUND = -49
539
X509_FMT_DER = 0
540
NO_TICKETS = 1<<10
541
ENABLE_RAWPK = 1<<18
542
CTYPE_PEERS = 3
543
KEYID_USE_SHA256 = 1 # gnutls/x509.h
544
OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
545
546
# Types
547
class session_int(ctypes.Structure):
548
_fields_ = []
549
session_t = ctypes.POINTER(session_int)
550
551
class certificate_credentials_st(ctypes.Structure):
552
_fields_ = []
553
certificate_credentials_t = ctypes.POINTER(
554
certificate_credentials_st)
555
certificate_type_t = ctypes.c_int
556
557
class datum_t(ctypes.Structure):
558
_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
559
('size', ctypes.c_uint)]
560
561
class openpgp_crt_int(ctypes.Structure):
562
_fields_ = []
563
openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
564
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
565
log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
566
credentials_type_t = ctypes.c_int
567
transport_ptr_t = ctypes.c_void_p
568
close_request_t = ctypes.c_int
569
570
# Exceptions
571
class Error(Exception):
572
# We need to use the class name "GnuTLS" here, since this
573
# exception might be raised from within GnuTLS.__init__,
574
# which is called before the assignment to the "gnutls"
575
# global variable has happened.
576
def __init__(self, message=None, code=None, args=()):
577
# Default usage is by a message string, but if a return
578
# code is passed, convert it to a string with
579
# gnutls.strerror()
580
self.code = code
581
if message is None and code is not None:
582
message = GnuTLS.strerror(code)
583
return super(GnuTLS.Error, self).__init__(
584
message, *args)
585
586
class CertificateSecurityError(Error):
587
pass
588
589
# Classes
590
class Credentials(object):
591
def __init__(self):
592
self._c_object = gnutls.certificate_credentials_t()
593
gnutls.certificate_allocate_credentials(
594
ctypes.byref(self._c_object))
595
self.type = gnutls.CRD_CERTIFICATE
596
597
def __del__(self):
598
gnutls.certificate_free_credentials(self._c_object)
599
600
class ClientSession(object):
601
def __init__(self, socket, credentials=None):
602
self._c_object = gnutls.session_t()
603
gnutls_flags = gnutls.CLIENT
604
if gnutls.check_version("3.5.6"):
605
gnutls_flags |= gnutls.NO_TICKETS
606
if gnutls.has_rawpk:
607
gnutls_flags |= gnutls.ENABLE_RAWPK
608
gnutls.init(ctypes.byref(self._c_object), gnutls_flags)
609
del gnutls_flags
610
gnutls.set_default_priority(self._c_object)
611
gnutls.transport_set_ptr(self._c_object, socket.fileno())
612
gnutls.handshake_set_private_extensions(self._c_object,
613
True)
614
self.socket = socket
615
if credentials is None:
616
credentials = gnutls.Credentials()
617
gnutls.credentials_set(self._c_object, credentials.type,
618
ctypes.cast(credentials._c_object,
619
ctypes.c_void_p))
620
self.credentials = credentials
621
622
def __del__(self):
623
gnutls.deinit(self._c_object)
624
625
def handshake(self):
626
return gnutls.handshake(self._c_object)
627
628
def send(self, data):
629
data = bytes(data)
630
data_len = len(data)
631
while data_len > 0:
632
data_len -= gnutls.record_send(self._c_object,
633
data[-data_len:],
634
data_len)
635
636
def bye(self):
637
return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
638
639
# Error handling functions
640
def _error_code(result):
641
"""A function to raise exceptions on errors, suitable
642
for the 'restype' attribute on ctypes functions"""
643
if result >= 0:
644
return result
645
if result == gnutls.E_NO_CERTIFICATE_FOUND:
646
raise gnutls.CertificateSecurityError(code=result)
647
raise gnutls.Error(code=result)
648
649
def _retry_on_error(result, func, arguments):
650
"""A function to retry on some errors, suitable
651
for the 'errcheck' attribute on ctypes functions"""
652
while result < 0:
653
if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
654
return _error_code(result)
655
result = func(*arguments)
656
return result
657
658
# Unless otherwise indicated, the function declarations below are
659
# all from the gnutls/gnutls.h C header file.
660
661
# Functions
662
priority_set_direct = _library.gnutls_priority_set_direct
663
priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
664
ctypes.POINTER(ctypes.c_char_p)]
665
priority_set_direct.restype = _error_code
666
667
init = _library.gnutls_init
668
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
669
init.restype = _error_code
670
671
set_default_priority = _library.gnutls_set_default_priority
672
set_default_priority.argtypes = [session_t]
673
set_default_priority.restype = _error_code
674
675
record_send = _library.gnutls_record_send
676
record_send.argtypes = [session_t, ctypes.c_void_p,
677
ctypes.c_size_t]
678
record_send.restype = ctypes.c_ssize_t
679
record_send.errcheck = _retry_on_error
680
681
certificate_allocate_credentials = (
682
_library.gnutls_certificate_allocate_credentials)
683
certificate_allocate_credentials.argtypes = [
684
ctypes.POINTER(certificate_credentials_t)]
685
certificate_allocate_credentials.restype = _error_code
686
687
certificate_free_credentials = (
688
_library.gnutls_certificate_free_credentials)
689
certificate_free_credentials.argtypes = [
690
certificate_credentials_t]
691
certificate_free_credentials.restype = None
692
693
handshake_set_private_extensions = (
694
_library.gnutls_handshake_set_private_extensions)
695
handshake_set_private_extensions.argtypes = [session_t,
696
ctypes.c_int]
697
handshake_set_private_extensions.restype = None
698
699
credentials_set = _library.gnutls_credentials_set
700
credentials_set.argtypes = [session_t, credentials_type_t,
701
ctypes.c_void_p]
702
credentials_set.restype = _error_code
703
704
strerror = _library.gnutls_strerror
705
strerror.argtypes = [ctypes.c_int]
706
strerror.restype = ctypes.c_char_p
707
708
certificate_type_get = _library.gnutls_certificate_type_get
709
certificate_type_get.argtypes = [session_t]
710
certificate_type_get.restype = _error_code
711
712
certificate_get_peers = _library.gnutls_certificate_get_peers
713
certificate_get_peers.argtypes = [session_t,
714
ctypes.POINTER(ctypes.c_uint)]
715
certificate_get_peers.restype = ctypes.POINTER(datum_t)
716
717
global_set_log_level = _library.gnutls_global_set_log_level
718
global_set_log_level.argtypes = [ctypes.c_int]
719
global_set_log_level.restype = None
720
721
global_set_log_function = _library.gnutls_global_set_log_function
722
global_set_log_function.argtypes = [log_func]
723
global_set_log_function.restype = None
724
725
deinit = _library.gnutls_deinit
726
deinit.argtypes = [session_t]
727
deinit.restype = None
728
729
handshake = _library.gnutls_handshake
730
handshake.argtypes = [session_t]
731
handshake.restype = _error_code
732
handshake.errcheck = _retry_on_error
733
734
transport_set_ptr = _library.gnutls_transport_set_ptr
735
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
736
transport_set_ptr.restype = None
737
738
bye = _library.gnutls_bye
739
bye.argtypes = [session_t, close_request_t]
740
bye.restype = _error_code
741
bye.errcheck = _retry_on_error
742
743
check_version = _library.gnutls_check_version
744
check_version.argtypes = [ctypes.c_char_p]
745
check_version.restype = ctypes.c_char_p
746
747
has_rawpk = bool(check_version(_tls_rawpk_version))
748
749
if has_rawpk:
750
# Types
751
class pubkey_st(ctypes.Structure):
752
_fields = []
753
pubkey_t = ctypes.POINTER(pubkey_st)
754
755
x509_crt_fmt_t = ctypes.c_int
756
757
# All the function declarations below are from gnutls/abstract.h
758
pubkey_init = _library.gnutls_pubkey_init
759
pubkey_init.argtypes = [ctypes.POINTER(pubkey_t)]
760
pubkey_init.restype = _error_code
761
762
pubkey_import = _library.gnutls_pubkey_import
763
pubkey_import.argtypes = [pubkey_t, ctypes.POINTER(datum_t),
764
x509_crt_fmt_t]
765
pubkey_import.restype = _error_code
766
767
pubkey_get_key_id = _library.gnutls_pubkey_get_key_id
768
pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,
769
ctypes.POINTER(ctypes.c_ubyte),
770
ctypes.POINTER(ctypes.c_size_t)]
771
pubkey_get_key_id.restype = _error_code
772
773
pubkey_deinit = _library.gnutls_pubkey_deinit
774
pubkey_deinit.argtypes = [pubkey_t]
775
pubkey_deinit.restype = None
776
else:
777
# All the function declarations below are from gnutls/openpgp.h
778
779
openpgp_crt_init = _library.gnutls_openpgp_crt_init
780
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
781
openpgp_crt_init.restype = _error_code
782
783
openpgp_crt_import = _library.gnutls_openpgp_crt_import
784
openpgp_crt_import.argtypes = [openpgp_crt_t,
785
ctypes.POINTER(datum_t),
786
openpgp_crt_fmt_t]
787
openpgp_crt_import.restype = _error_code
788
789
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
790
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
791
ctypes.POINTER(ctypes.c_uint)]
792
openpgp_crt_verify_self.restype = _error_code
793
794
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
795
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
796
openpgp_crt_deinit.restype = None
797
798
openpgp_crt_get_fingerprint = (
799
_library.gnutls_openpgp_crt_get_fingerprint)
800
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
801
ctypes.c_void_p,
802
ctypes.POINTER(
803
ctypes.c_size_t)]
804
openpgp_crt_get_fingerprint.restype = _error_code
805
806
if check_version("3.6.4"):
807
certificate_type_get2 = _library.gnutls_certificate_type_get2
808
certificate_type_get2.argtypes = [session_t, ctypes.c_int]
809
certificate_type_get2.restype = _error_code
810
811
# Remove non-public functions
812
del _error_code, _retry_on_error
813
# Create the global "gnutls" object, simulating a module
814
gnutls = GnuTLS()
815
816
817
def call_pipe(connection, # : multiprocessing.Connection
818
func, *args, **kwargs):
819
"""This function is meant to be called by multiprocessing.Process
820
821
This function runs func(*args, **kwargs), and writes the resulting
822
return value on the provided multiprocessing.Connection.
823
"""
824
connection.send(func(*args, **kwargs))
825
connection.close()
826
827
267
def _timedelta_to_milliseconds(td):
268
"Convert a datetime.timedelta() to milliseconds"
269
return ((td.days * 24 * 60 * 60 * 1000)
270
+ (td.seconds * 1000)
271
+ (td.microseconds // 1000))
272
828
273
class Client(object):
829
274
"""A representation of a client host served by this server.
830
275
831
276
Attributes:
832
approved: bool(); 'None' if not yet approved/disapproved
277
_approved: bool(); 'None' if not yet approved/disapproved
833
278
approval_delay: datetime.timedelta(); Time to wait for approval
834
279
approval_duration: datetime.timedelta(); Duration of one approval
835
280
checker: subprocess.Popen(); a running checker process used
836
281
to see if the client lives.
837
282
'None' if no process is running.
838
checker_callback_tag: a GLib event source tag, or None
283
checker_callback_tag: a gobject event source tag, or None
839
284
checker_command: string; External command which is run to check
840
285
if client lives. %() expansions are done at
841
286
runtime with vars(self) as dict, so that for
842
287
instance %(name)s can be used in the command.
843
checker_initiator_tag: a GLib event source tag, or None
288
checker_initiator_tag: a gobject event source tag, or None
844
289
created: datetime.datetime(); (UTC) object creation
845
client_structure: Object describing what attributes a client has
846
and is used for storing the client at exit
847
290
current_checker_command: string; current running checker_command
848
disable_initiator_tag: a GLib event source tag, or None
291
disable_hook: If set, called by disable() as disable_hook(self)
292
disable_initiator_tag: a gobject event source tag, or None
849
293
enabled: bool()
850
294
fingerprint: string (40 or 32 hexadecimal digits); used to
851
uniquely identify an OpenPGP client
852
key_id: string (64 hexadecimal digits); used to uniquely identify
853
a client using raw public keys
295
uniquely identify the client
854
296
host: string; available for use by the checker command
855
297
interval: datetime.timedelta(); How often to start a new checker
856
298
last_approval_request: datetime.datetime(); (UTC) or None
857
299
last_checked_ok: datetime.datetime(); (UTC) or None
858
last_checker_status: integer between 0 and 255 reflecting exit
859
status of last checker. -1 reflects crashed
860
checker, -2 means no checker completed yet.
861
last_checker_signal: The signal which killed the last checker, if
862
last_checker_status is -1
863
last_enabled: datetime.datetime(); (UTC) or None
300
last_enabled: datetime.datetime(); (UTC)
864
301
name: string; from the config file, used in log messages and
865
302
D-Bus identifiers
866
303
secret: bytestring; sent verbatim (over TLS) to client
867
304
timeout: datetime.timedelta(); How long from last_checked_ok
868
305
until this client is disabled
869
extended_timeout: extra long timeout when secret has been sent
306
extended_timeout: extra long timeout when password has been sent
870
307
runtime_expansions: Allowed attributes for runtime expansion.
871
308
expires: datetime.datetime(); time (UTC) when a client will be
872
309
disabled, or None
873
server_settings: The server_settings dict from main()
874
310
"""
875
311
876
312
runtime_expansions = ("approval_delay", "approval_duration",
877
"created", "enabled", "expires", "key_id",
878
"fingerprint", "host", "interval",
879
"last_approval_request", "last_checked_ok",
313
"created", "enabled", "fingerprint",
314
"host", "interval", "last_checked_ok",
880
315
"last_enabled", "name", "timeout")
881
client_defaults = {
882
"timeout": "PT5M",
883
"extended_timeout": "PT15M",
884
"interval": "PT2M",
885
"checker": "fping -q -- %%(host)s",
886
"host": "",
887
"approval_delay": "PT0S",
888
"approval_duration": "PT1S",
889
"approved_by_default": "True",
890
"enabled": "True",
891
}
892
893
@staticmethod
894
def config_parser(config):
895
"""Construct a new dict of client settings of this form:
896
{ client_name: {setting_name: value, ...}, ...}
897
with exceptions for any special settings as defined above.
898
NOTE: Must be a pure function. Must return the same result
899
value given the same arguments.
900
"""
901
settings = {}
902
for client_name in config.sections():
903
section = dict(config.items(client_name))
904
client = settings[client_name] = {}
905
906
client["host"] = section["host"]
907
# Reformat values from string types to Python types
908
client["approved_by_default"] = config.getboolean(
909
client_name, "approved_by_default")
910
client["enabled"] = config.getboolean(client_name,
911
"enabled")
912
913
# Uppercase and remove spaces from key_id and fingerprint
914
# for later comparison purposes with return value from the
915
# key_id() and fingerprint() functions
916
client["key_id"] = (section.get("key_id", "").upper()
917
.replace(" ", ""))
918
client["fingerprint"] = (section["fingerprint"].upper()
919
.replace(" ", ""))
920
if "secret" in section:
921
client["secret"] = codecs.decode(section["secret"]
922
.encode("utf-8"),
923
"base64")
924
elif "secfile" in section:
925
with open(os.path.expanduser(os.path.expandvars
926
(section["secfile"])),
927
"rb") as secfile:
928
client["secret"] = secfile.read()
929
else:
930
raise TypeError("No secret or secfile for section {}"
931
.format(section))
932
client["timeout"] = string_to_delta(section["timeout"])
933
client["extended_timeout"] = string_to_delta(
934
section["extended_timeout"])
935
client["interval"] = string_to_delta(section["interval"])
936
client["approval_delay"] = string_to_delta(
937
section["approval_delay"])
938
client["approval_duration"] = string_to_delta(
939
section["approval_duration"])
940
client["checker_command"] = section["checker"]
941
client["last_approval_request"] = None
942
client["last_checked_ok"] = None
943
client["last_checker_status"] = -2
944
945
return settings
946
947
def __init__(self, settings, name=None, server_settings=None):
316
317
def timeout_milliseconds(self):
318
"Return the 'timeout' attribute in milliseconds"
319
return _timedelta_to_milliseconds(self.timeout)
320
321
def extended_timeout_milliseconds(self):
322
"Return the 'extended_timeout' attribute in milliseconds"
323
return _timedelta_to_milliseconds(self.extended_timeout)
324
325
def interval_milliseconds(self):
326
"Return the 'interval' attribute in milliseconds"
327
return _timedelta_to_milliseconds(self.interval)
328
329
def approval_delay_milliseconds(self):
330
return _timedelta_to_milliseconds(self.approval_delay)
331
332
def __init__(self, name = None, disable_hook=None, config=None):
333
"""Note: the 'checker' key in 'config' sets the
334
'checker_command' attribute and *not* the 'checker'
335
attribute."""
948
336
self.name = name
949
if server_settings is None:
950
server_settings = {}
951
self.server_settings = server_settings
952
# adding all client settings
953
for setting, value in settings.items():
954
setattr(self, setting, value)
955
956
if self.enabled:
957
if not hasattr(self, "last_enabled"):
958
self.last_enabled = datetime.datetime.utcnow()
959
if not hasattr(self, "expires"):
960
self.expires = (datetime.datetime.utcnow()
961
+ self.timeout)
962
else:
963
self.last_enabled = None
964
self.expires = None
965
337
if config is None:
338
config = {}
966
339
logger.debug("Creating client %r", self.name)
967
logger.debug(" Key ID: %s", self.key_id)
340
# Uppercase and remove spaces from fingerprint for later
341
# comparison purposes with return value from the fingerprint()
342
# function
343
self.fingerprint = (config["fingerprint"].upper()
344
.replace(" ", ""))
968
345
logger.debug(" Fingerprint: %s", self.fingerprint)
969
self.created = settings.get("created",
970
datetime.datetime.utcnow())
971
972
# attributes specific for this server instance
346
if "secret" in config:
347
self.secret = config["secret"].decode("base64")
348
elif "secfile" in config:
349
with open(os.path.expanduser(os.path.expandvars
350
(config["secfile"])),
351
"rb") as secfile:
352
self.secret = secfile.read()
353
else:
354
raise TypeError("No secret or secfile for client %s"
355
% self.name)
356
self.host = config.get("host", "")
357
self.created = datetime.datetime.utcnow()
358
self.enabled = False
359
self.last_approval_request = None
360
self.last_enabled = None
361
self.last_checked_ok = None
362
self.timeout = string_to_delta(config["timeout"])
363
self.extended_timeout = string_to_delta(config["extended_timeout"])
364
self.interval = string_to_delta(config["interval"])
365
self.disable_hook = disable_hook
973
366
self.checker = None
974
367
self.checker_initiator_tag = None
975
368
self.disable_initiator_tag = None
369
self.expires = None
976
370
self.checker_callback_tag = None
371
self.checker_command = config["checker"]
977
372
self.current_checker_command = None
978
self.approved = None
373
self.last_connect = None
374
self._approved = None
375
self.approved_by_default = config.get("approved_by_default",
376
True)
979
377
self.approvals_pending = 0
980
self.changedstate = multiprocessing_manager.Condition(
981
multiprocessing_manager.Lock())
982
self.client_structure = [attr
983
for attr in self.__dict__.keys()
984
if not attr.startswith("_")]
985
self.client_structure.append("client_structure")
986
987
for name, t in inspect.getmembers(
988
type(self), lambda obj: isinstance(obj, property)):
989
if not name.startswith("_"):
990
self.client_structure.append(name)
991
992
# Send notice to process children that client state has changed
378
self.approval_delay = string_to_delta(
379
config["approval_delay"])
380
self.approval_duration = string_to_delta(
381
config["approval_duration"])
382
self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())
383
993
384
def send_changedstate(self):
994
with self.changedstate:
995
self.changedstate.notify_all()
996
385
self.changedstate.acquire()
386
self.changedstate.notify_all()
387
self.changedstate.release()
388
997
389
def enable(self):
998
390
"""Start this client's checker and timeout hooks"""
999
391
if getattr(self, "enabled", False):
1000
392
# Already enabled
1001
393
return
394
self.send_changedstate()
395
# Schedule a new checker to be started an 'interval' from now,
396
# and every interval from then on.
397
self.checker_initiator_tag = (gobject.timeout_add
398
(self.interval_milliseconds(),
399
self.start_checker))
400
# Schedule a disable() when 'timeout' has passed
1002
401
self.expires = datetime.datetime.utcnow() + self.timeout
402
self.disable_initiator_tag = (gobject.timeout_add
403
(self.timeout_milliseconds(),
404
self.disable))
1003
405
self.enabled = True
1004
406
self.last_enabled = datetime.datetime.utcnow()
1005
self.init_checker()
1006
self.send_changedstate()
1007
407
# Also start a new checker *right now*.
408
self.start_checker()
409
1008
410
def disable(self, quiet=True):
1009
411
"""Disable this client."""
1010
412
if not getattr(self, "enabled", False):
1011
413
return False
1012
414
if not quiet:
415
self.send_changedstate()
416
if not quiet:
1013
417
logger.info("Disabling client %s", self.name)
1014
if getattr(self, "disable_initiator_tag", None) is not None:
1015
GLib.source_remove(self.disable_initiator_tag)
418
if getattr(self, "disable_initiator_tag", False):
419
gobject.source_remove(self.disable_initiator_tag)
1016
420
self.disable_initiator_tag = None
1017
421
self.expires = None
1018
if getattr(self, "checker_initiator_tag", None) is not None:
1019
GLib.source_remove(self.checker_initiator_tag)
422
if getattr(self, "checker_initiator_tag", False):
423
gobject.source_remove(self.checker_initiator_tag)
1020
424
self.checker_initiator_tag = None
1021
425
self.stop_checker()
426
if self.disable_hook:
427
self.disable_hook(self)
1022
428
self.enabled = False
1023
if not quiet:
1024
self.send_changedstate()
1025
# Do not run this again if called by a GLib.timeout_add
429
# Do not run this again if called by a gobject.timeout_add
1026
430
return False
1027
431
1028
432
def __del__(self):
433
self.disable_hook = None
1029
434
self.disable()
1030
1031
def init_checker(self):
1032
# Schedule a new checker to be started an 'interval' from now,
1033
# and every interval from then on.
1034
if self.checker_initiator_tag is not None:
1035
GLib.source_remove(self.checker_initiator_tag)
1036
self.checker_initiator_tag = GLib.timeout_add(
1037
int(self.interval.total_seconds() * 1000),
1038
self.start_checker)
1039
# Schedule a disable() when 'timeout' has passed
1040
if self.disable_initiator_tag is not None:
1041
GLib.source_remove(self.disable_initiator_tag)
1042
self.disable_initiator_tag = GLib.timeout_add(
1043
int(self.timeout.total_seconds() * 1000), self.disable)
1044
# Also start a new checker *right now*.
1045
self.start_checker()
1046
1047
def checker_callback(self, source, condition, connection,
1048
command):
435
436
def checker_callback(self, pid, condition, command):
1049
437
"""The checker has completed, so take appropriate actions."""
1050
438
self.checker_callback_tag = None
1051
439
self.checker = None
1052
# Read return code from connection (see call_pipe)
1053
returncode = connection.recv()
1054
connection.close()
1055
1056
if returncode >= 0:
1057
self.last_checker_status = returncode
1058
self.last_checker_signal = None
1059
if self.last_checker_status == 0:
440
if os.WIFEXITED(condition):
441
exitstatus = os.WEXITSTATUS(condition)
442
if exitstatus == 0:
1060
443
logger.info("Checker for %(name)s succeeded",
1061
444
vars(self))
1062
445
self.checked_ok()
1063
446
else:
1064
logger.info("Checker for %(name)s failed", vars(self))
447
logger.info("Checker for %(name)s failed",
448
vars(self))
1065
449
else:
1066
self.last_checker_status = -1
1067
self.last_checker_signal = -returncode
1068
450
logger.warning("Checker for %(name)s crashed?",
1069
451
vars(self))
1070
return False
1071
1072
def checked_ok(self):
1073
"""Assert that the client has been seen, alive and well."""
1074
self.last_checked_ok = datetime.datetime.utcnow()
1075
self.last_checker_status = 0
1076
self.last_checker_signal = None
1077
self.bump_timeout()
1078
1079
def bump_timeout(self, timeout=None):
1080
"""Bump up the timeout for this client."""
452
453
def checked_ok(self, timeout=None):
454
"""Bump up the timeout for this client.
455
456
This should only be called when the client has been seen,
457
alive and well.
458
"""
1081
459
if timeout is None:
1082
460
timeout = self.timeout
1083
if self.disable_initiator_tag is not None:
1084
GLib.source_remove(self.disable_initiator_tag)
1085
self.disable_initiator_tag = None
1086
if getattr(self, "enabled", False):
1087
self.disable_initiator_tag = GLib.timeout_add(
1088
int(timeout.total_seconds() * 1000), self.disable)
1089
self.expires = datetime.datetime.utcnow() + timeout
1090
461
self.last_checked_ok = datetime.datetime.utcnow()
462
gobject.source_remove(self.disable_initiator_tag)
463
self.expires = datetime.datetime.utcnow() + timeout
464
self.disable_initiator_tag = (gobject.timeout_add
465
(_timedelta_to_milliseconds(timeout),
466
self.disable))
467
1091
468
def need_approval(self):
1092
469
self.last_approval_request = datetime.datetime.utcnow()
1093
470
1094
471
def start_checker(self):
1095
472
"""Start a new checker subprocess if one is not running.
1096
473
1097
474
If a checker already exists, leave it running and do
1098
475
nothing."""
1099
476
# The reason for not killing a running checker is that if we
1100
# did that, and if a checker (for some reason) started running
1101
# slowly and taking more than 'interval' time, then the client
1102
# would inevitably timeout, since no checker would get a
1103
# chance to run to completion. If we instead leave running
477
# did that, then if a checker (for some reason) started
478
# running slowly and taking more than 'interval' time, the
479
# client would inevitably timeout, since no checker would get
480
# a chance to run to completion. If we instead leave running
1104
481
# checkers alone, the checker would have to take more time
1105
482
# than 'timeout' for the client to be disabled, which is as it
1106
483
# should be.
1107
1108
if self.checker is not None and not self.checker.is_alive():
1109
logger.warning("Checker was not alive; joining")
1110
self.checker.join()
1111
self.checker = None
484
485
# If a checker exists, make sure it is not a zombie
486
try:
487
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
488
except (AttributeError, OSError) as error:
489
if (isinstance(error, OSError)
490
and error.errno != errno.ECHILD):
491
raise error
492
else:
493
if pid:
494
logger.warning("Checker was a zombie")
495
gobject.source_remove(self.checker_callback_tag)
496
self.checker_callback(pid, status,
497
self.current_checker_command)
1112
498
# Start a new checker if needed
1113
499
if self.checker is None:
1114
# Escape attributes for the shell
1115
escaped_attrs = {
1116
attr: re.escape(str(getattr(self, attr)))
1117
for attr in self.runtime_expansions}
1118
500
try:
1119
command = self.checker_command % escaped_attrs
1120
except TypeError as error:
1121
logger.error('Could not format string "%s"',
1122
self.checker_command,
1123
exc_info=error)
1124
return True # Try again later
501
# In case checker_command has exactly one % operator
502
command = self.checker_command % self.host
503
except TypeError:
504
# Escape attributes for the shell
505
escaped_attrs = dict(
506
(attr,
507
re.escape(unicode(str(getattr(self, attr, "")),
508
errors=
509
'replace')))
510
for attr in
511
self.runtime_expansions)
512
513
try:
514
command = self.checker_command % escaped_attrs
515
except TypeError as error:
516
logger.error('Could not format string "%s":'
517
' %s', self.checker_command, error)
518
return True # Try again later
1125
519
self.current_checker_command = command
1126
logger.info("Starting checker %r for %s", command,
1127
self.name)
1128
# We don't need to redirect stdout and stderr, since
1129
# in normal mode, that is already done by daemon(),
1130
# and in debug mode we don't want to. (Stdin is
1131
# always replaced by /dev/null.)
1132
# The exception is when not debugging but nevertheless
1133
# running in the foreground; use the previously
1134
# created wnull.
1135
popen_args = {"close_fds": True,
1136
"shell": True,
1137
"cwd": "/"}
1138
if (not self.server_settings["debug"]
1139
and self.server_settings["foreground"]):
1140
popen_args.update({"stdout": wnull,
1141
"stderr": wnull})
1142
pipe = multiprocessing.Pipe(duplex=False)
1143
self.checker = multiprocessing.Process(
1144
target=call_pipe,
1145
args=(pipe[1], subprocess.call, command),
1146
kwargs=popen_args)
1147
self.checker.start()
1148
self.checker_callback_tag = GLib.io_add_watch(
1149
pipe[0].fileno(), GLib.IO_IN,
1150
self.checker_callback, pipe[0], command)
1151
# Re-run this periodically if run by GLib.timeout_add
520
try:
521
logger.info("Starting checker %r for %s",
522
command, self.name)
523
# We don't need to redirect stdout and stderr, since
524
# in normal mode, that is already done by daemon(),
525
# and in debug mode we don't want to. (Stdin is
526
# always replaced by /dev/null.)
527
self.checker = subprocess.Popen(command,
528
close_fds=True,
529
shell=True, cwd="/")
530
self.checker_callback_tag = (gobject.child_watch_add
531
(self.checker.pid,
532
self.checker_callback,
533
data=command))
534
# The checker may have completed before the gobject
535
# watch was added. Check for this.
536
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
537
if pid:
538
gobject.source_remove(self.checker_callback_tag)
539
self.checker_callback(pid, status, command)
540
except OSError as error:
541
logger.error("Failed to start subprocess: %s",
542
error)
543
# Re-run this periodically if run by gobject.timeout_add
1152
544
return True
1153
545
1154
546
def stop_checker(self):
1155
547
"""Force the checker process, if any, to stop."""
1156
548
if self.checker_callback_tag:
1157
GLib.source_remove(self.checker_callback_tag)
549
gobject.source_remove(self.checker_callback_tag)
1158
550
self.checker_callback_tag = None
1159
551
if getattr(self, "checker", None) is None:
1160
552
return
1161
553
logger.debug("Stopping checker for %(name)s", vars(self))
1162
self.checker.terminate()
554
try:
555
os.kill(self.checker.pid, signal.SIGTERM)
556
#time.sleep(0.5)
557
#if self.checker.poll() is None:
558
# os.kill(self.checker.pid, signal.SIGKILL)
559
except OSError as error:
560
if error.errno != errno.ESRCH: # No such process
561
raise
1163
562
self.checker = None
1164
563
1165
1166
def dbus_service_property(dbus_interface,
1167
signature="v",
1168
access="readwrite",
1169
byte_arrays=False):
564
def dbus_service_property(dbus_interface, signature="v",
565
access="readwrite", byte_arrays=False):
1170
566
"""Decorators for marking methods of a DBusObjectWithProperties to
1171
567
become properties on the D-Bus.
1172
568
1173
569
The decorated method will be called with no arguments by "Get"
1174
570
and with one argument by "Set".
1175
571
1176
572
The parameters, where they are supported, are the same as
1177
573
dbus.service.method, except there is only "signature", since the
1178
574
type from Get() and the type sent to Set() is the same.
1181
577
# "Set" method, so we fail early here:
1182
578
if byte_arrays and signature != "ay":
1183
579
raise ValueError("Byte arrays not supported for non-'ay'"
1184
" signature {!r}".format(signature))
1185
580
" signature %r" % signature)
1186
581
def decorator(func):
1187
582
func._dbus_is_property = True
1188
583
func._dbus_interface = dbus_interface
1191
586
func._dbus_name = func.__name__
1192
587
if func._dbus_name.endswith("_dbus_property"):
1193
588
func._dbus_name = func._dbus_name[:-14]
1194
func._dbus_get_args_options = {'byte_arrays': byte_arrays}
1195
return func
1196
1197
return decorator
1198
1199
1200
def dbus_interface_annotations(dbus_interface):
1201
"""Decorator for marking functions returning interface annotations
1202
1203
Usage:
1204
1205
@dbus_interface_annotations("org.example.Interface")
1206
def _foo(self): # Function name does not matter
1207
return {"org.freedesktop.DBus.Deprecated": "true",
1208
"org.freedesktop.DBus.Property.EmitsChangedSignal":
1209
"false"}
1210
"""
1211
1212
def decorator(func):
1213
func._dbus_is_interface = True
1214
func._dbus_interface = dbus_interface
1215
func._dbus_name = dbus_interface
1216
return func
1217
1218
return decorator
1219
1220
1221
def dbus_annotations(annotations):
1222
"""Decorator to annotate D-Bus methods, signals or properties
1223
Usage:
1224
1225
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
1226
"org.freedesktop.DBus.Property."
1227
"EmitsChangedSignal": "false"})
1228
@dbus_service_property("org.example.Interface", signature="b",
1229
access="r")
1230
def Property_dbus_property(self):
1231
return dbus.Boolean(False)
1232
1233
See also the DBusObjectWithAnnotations class.
1234
"""
1235
1236
def decorator(func):
1237
func._dbus_annotations = annotations
1238
return func
1239
589
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
590
return func
1240
591
return decorator
1241
592
1242
593
1243
594
class DBusPropertyException(dbus.exceptions.DBusException):
1244
595
"""A base class for D-Bus property-related exceptions
1245
596
"""
1246
pass
597
def __unicode__(self):
598
return unicode(str(self))
1247
599
1248
600
1249
601
class DBusPropertyAccessException(DBusPropertyException):
1258
610
pass
1259
611
1260
612
1261
class DBusObjectWithAnnotations(dbus.service.Object):
1262
"""A D-Bus object with annotations.
1263
1264
Classes inheriting from this can use the dbus_annotations
1265
decorator to add annotations to methods or signals.
1266
"""
1267
1268
@staticmethod
1269
def _is_dbus_thing(thing):
1270
"""Returns a function testing if an attribute is a D-Bus thing
1271
1272
If called like _is_dbus_thing("method") it returns a function
1273
suitable for use as predicate to inspect.getmembers().
1274
"""
1275
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
1276
False)
1277
1278
def _get_all_dbus_things(self, thing):
1279
"""Returns a generator of (name, attribute) pairs
1280
"""
1281
return ((getattr(athing.__get__(self), "_dbus_name", name),
1282
athing.__get__(self))
1283
for cls in self.__class__.__mro__
1284
for name, athing in
1285
inspect.getmembers(cls, self._is_dbus_thing(thing)))
1286
1287
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1288
out_signature="s",
1289
path_keyword='object_path',
1290
connection_keyword='connection')
1291
def Introspect(self, object_path, connection):
1292
"""Overloading of standard D-Bus method.
1293
1294
Inserts annotation tags on methods and signals.
1295
"""
1296
xmlstring = dbus.service.Object.Introspect(self, object_path,
1297
connection)
1298
try:
1299
document = xml.dom.minidom.parseString(xmlstring)
1300
1301
for if_tag in document.getElementsByTagName("interface"):
1302
# Add annotation tags
1303
for typ in ("method", "signal"):
1304
for tag in if_tag.getElementsByTagName(typ):
1305
annots = dict()
1306
for name, prop in (self.
1307
_get_all_dbus_things(typ)):
1308
if (name == tag.getAttribute("name")
1309
and prop._dbus_interface
1310
== if_tag.getAttribute("name")):
1311
annots.update(getattr(
1312
prop, "_dbus_annotations", {}))
1313
for name, value in annots.items():
1314
ann_tag = document.createElement(
1315
"annotation")
1316
ann_tag.setAttribute("name", name)
1317
ann_tag.setAttribute("value", value)
1318
tag.appendChild(ann_tag)
1319
# Add interface annotation tags
1320
for annotation, value in dict(
1321
itertools.chain.from_iterable(
1322
annotations().items()
1323
for name, annotations
1324
in self._get_all_dbus_things("interface")
1325
if name == if_tag.getAttribute("name")
1326
)).items():
1327
ann_tag = document.createElement("annotation")
1328
ann_tag.setAttribute("name", annotation)
1329
ann_tag.setAttribute("value", value)
1330
if_tag.appendChild(ann_tag)
1331
# Fix argument name for the Introspect method itself
1332
if (if_tag.getAttribute("name")
1333
== dbus.INTROSPECTABLE_IFACE):
1334
for cn in if_tag.getElementsByTagName("method"):
1335
if cn.getAttribute("name") == "Introspect":
1336
for arg in cn.getElementsByTagName("arg"):
1337
if (arg.getAttribute("direction")
1338
== "out"):
1339
arg.setAttribute("name",
1340
"xml_data")
1341
xmlstring = document.toxml("utf-8")
1342
document.unlink()
1343
except (AttributeError, xml.dom.DOMException,
1344
xml.parsers.expat.ExpatError) as error:
1345
logger.error("Failed to override Introspection method",
1346
exc_info=error)
1347
return xmlstring
1348
1349
1350
class DBusObjectWithProperties(DBusObjectWithAnnotations):
613
class DBusObjectWithProperties(dbus.service.Object):
1351
614
"""A D-Bus object with properties.
1352
615
1353
616
Classes inheriting from this can use the dbus_service_property
1354
617
decorator to expose methods as D-Bus properties. It exposes the
1355
618
standard Get(), Set(), and GetAll() methods on the D-Bus.
1356
619
"""
1357
620
621
@staticmethod
622
def _is_dbus_property(obj):
623
return getattr(obj, "_dbus_is_property", False)
624
625
def _get_all_dbus_properties(self):
626
"""Returns a generator of (name, attribute) pairs
627
"""
628
return ((prop._dbus_name, prop)
629
for name, prop in
630
inspect.getmembers(self, self._is_dbus_property))
631
1358
632
def _get_dbus_property(self, interface_name, property_name):
1359
633
"""Returns a bound method if one exists which is a D-Bus
1360
634
property with the specified name and interface.
1361
635
"""
1362
for cls in self.__class__.__mro__:
1363
for name, value in inspect.getmembers(
1364
cls, self._is_dbus_thing("property")):
1365
if (value._dbus_name == property_name
1366
and value._dbus_interface == interface_name):
1367
return value.__get__(self)
1368
636
for name in (property_name,
637
property_name + "_dbus_property"):
638
prop = getattr(self, name, None)
639
if (prop is None
640
or not self._is_dbus_property(prop)
641
or prop._dbus_name != property_name
642
or (interface_name and prop._dbus_interface
643
and interface_name != prop._dbus_interface)):
644
continue
645
return prop
1369
646
# No such property
1370
raise DBusPropertyNotFound("{}:{}.{}".format(
1371
self.dbus_object_path, interface_name, property_name))
1372
1373
@classmethod
1374
def _get_all_interface_names(cls):
1375
"""Get a sequence of all interfaces supported by an object"""
1376
return (name for name in set(getattr(getattr(x, attr),
1377
"_dbus_interface", None)
1378
for x in (inspect.getmro(cls))
1379
for attr in dir(x))
1380
if name is not None)
1381
1382
@dbus.service.method(dbus.PROPERTIES_IFACE,
1383
in_signature="ss",
647
raise DBusPropertyNotFound(self.dbus_object_path + ":"
648
+ interface_name + "."
649
+ property_name)
650
651
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
1384
652
out_signature="v")
1385
653
def Get(self, interface_name, property_name):
1386
654
"""Standard D-Bus property Get() method, see D-Bus standard.
1392
660
if not hasattr(value, "variant_level"):
1393
661
return value
1394
662
return type(value)(value, variant_level=value.variant_level+1)
1395
663
1396
664
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
1397
665
def Set(self, interface_name, property_name, value):
1398
666
"""Standard D-Bus property Set() method, see D-Bus standard.
1404
672
# The byte_arrays option is not supported yet on
1405
673
# signatures other than "ay".
1406
674
if prop._dbus_signature != "ay":
1407
raise ValueError("Byte arrays not supported for non-"
1408
"'ay' signature {!r}"
1409
.format(prop._dbus_signature))
1410
value = dbus.ByteArray(b''.join(chr(byte)
1411
for byte in value))
675
raise ValueError
676
value = dbus.ByteArray(''.join(unichr(byte)
677
for byte in value))
1412
678
prop(value)
1413
1414
@dbus.service.method(dbus.PROPERTIES_IFACE,
1415
in_signature="s",
679
680
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
1416
681
out_signature="a{sv}")
1417
682
def GetAll(self, interface_name):
1418
683
"""Standard D-Bus property GetAll() method, see D-Bus
1420
685
1421
686
Note: Will not include properties with access="write".
1422
687
"""
1423
properties = {}
1424
for name, prop in self._get_all_dbus_things("property"):
688
all = {}
689
for name, prop in self._get_all_dbus_properties():
1425
690
if (interface_name
1426
691
and interface_name != prop._dbus_interface):
1427
692
# Interface non-empty but did not match
1431
696
continue
1432
697
value = prop()
1433
698
if not hasattr(value, "variant_level"):
1434
properties[name] = value
699
all[name] = value
1435
700
continue
1436
properties[name] = type(value)(
1437
value, variant_level=value.variant_level + 1)
1438
return dbus.Dictionary(properties, signature="sv")
1439
1440
@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
1441
def PropertiesChanged(self, interface_name, changed_properties,
1442
invalidated_properties):
1443
"""Standard D-Bus PropertiesChanged() signal, see D-Bus
1444
standard.
1445
"""
1446
pass
1447
701
all[name] = type(value)(value, variant_level=
702
value.variant_level+1)
703
return dbus.Dictionary(all, signature="sv")
704
1448
705
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1449
706
out_signature="s",
1450
707
path_keyword='object_path',
1451
708
connection_keyword='connection')
1452
709
def Introspect(self, object_path, connection):
1453
"""Overloading of standard D-Bus method.
1454
1455
Inserts property tags and interface annotation tags.
710
"""Standard D-Bus method, overloaded to insert property tags.
1456
711
"""
1457
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1458
object_path,
1459
connection)
712
xmlstring = dbus.service.Object.Introspect(self, object_path,
713
connection)
1460
714
try:
1461
715
document = xml.dom.minidom.parseString(xmlstring)
1462
1463
716
def make_tag(document, name, prop):
1464
717
e = document.createElement("property")
1465
718
e.setAttribute("name", name)
1466
719
e.setAttribute("type", prop._dbus_signature)
1467
720
e.setAttribute("access", prop._dbus_access)
1468
721
return e
1469
1470
722
for if_tag in document.getElementsByTagName("interface"):
1471
# Add property tags
1472
723
for tag in (make_tag(document, name, prop)
1473
724
for name, prop
1474
in self._get_all_dbus_things("property")
725
in self._get_all_dbus_properties()
1475
726
if prop._dbus_interface
1476
727
== if_tag.getAttribute("name")):
1477
728
if_tag.appendChild(tag)
1478
# Add annotation tags for properties
1479
for tag in if_tag.getElementsByTagName("property"):
1480
annots = dict()
1481
for name, prop in self._get_all_dbus_things(
1482
"property"):
1483
if (name == tag.getAttribute("name")
1484
and prop._dbus_interface
1485
== if_tag.getAttribute("name")):
1486
annots.update(getattr(
1487
prop, "_dbus_annotations", {}))
1488
for name, value in annots.items():
1489
ann_tag = document.createElement(
1490
"annotation")
1491
ann_tag.setAttribute("name", name)
1492
ann_tag.setAttribute("value", value)
1493
tag.appendChild(ann_tag)
1494
729
# Add the names to the return values for the
1495
730
# "org.freedesktop.DBus.Properties" methods
1496
731
if (if_tag.getAttribute("name")
1511
746
except (AttributeError, xml.dom.DOMException,
1512
747
xml.parsers.expat.ExpatError) as error:
1513
748
logger.error("Failed to override Introspection method",
1514
exc_info=error)
1515
return xmlstring
1516
1517
1518
try:
1519
dbus.OBJECT_MANAGER_IFACE
1520
except AttributeError:
1521
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1522
1523
1524
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1525
"""A D-Bus object with an ObjectManager.
1526
1527
Classes inheriting from this exposes the standard
1528
GetManagedObjects call and the InterfacesAdded and
1529
InterfacesRemoved signals on the standard
1530
"org.freedesktop.DBus.ObjectManager" interface.
1531
1532
Note: No signals are sent automatically; they must be sent
1533
manually.
1534
"""
1535
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1536
out_signature="a{oa{sa{sv}}}")
1537
def GetManagedObjects(self):
1538
"""This function must be overridden"""
1539
raise NotImplementedError()
1540
1541
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1542
signature="oa{sa{sv}}")
1543
def InterfacesAdded(self, object_path, interfaces_and_properties):
1544
pass
1545
1546
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1547
def InterfacesRemoved(self, object_path, interfaces):
1548
pass
1549
1550
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1551
out_signature="s",
1552
path_keyword='object_path',
1553
connection_keyword='connection')
1554
def Introspect(self, object_path, connection):
1555
"""Overloading of standard D-Bus method.
1556
1557
Override return argument name of GetManagedObjects to be
1558
"objpath_interfaces_and_properties"
1559
"""
1560
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1561
object_path,
1562
connection)
1563
try:
1564
document = xml.dom.minidom.parseString(xmlstring)
1565
1566
for if_tag in document.getElementsByTagName("interface"):
1567
# Fix argument name for the GetManagedObjects method
1568
if (if_tag.getAttribute("name")
1569
== dbus.OBJECT_MANAGER_IFACE):
1570
for cn in if_tag.getElementsByTagName("method"):
1571
if (cn.getAttribute("name")
1572
== "GetManagedObjects"):
1573
for arg in cn.getElementsByTagName("arg"):
1574
if (arg.getAttribute("direction")
1575
== "out"):
1576
arg.setAttribute(
1577
"name",
1578
"objpath_interfaces"
1579
"_and_properties")
1580
xmlstring = document.toxml("utf-8")
1581
document.unlink()
1582
except (AttributeError, xml.dom.DOMException,
1583
xml.parsers.expat.ExpatError) as error:
1584
logger.error("Failed to override Introspection method",
1585
exc_info=error)
1586
return xmlstring
1587
1588
1589
def datetime_to_dbus(dt, variant_level=0):
749
error)
750
return xmlstring
751
752
753
def datetime_to_dbus (dt, variant_level=0):
1590
754
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1591
755
if dt is None:
1592
return dbus.String("", variant_level=variant_level)
1593
return dbus.String(dt.isoformat(), variant_level=variant_level)
1594
1595
1596
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1597
"""A class decorator; applied to a subclass of
1598
dbus.service.Object, it will add alternate D-Bus attributes with
1599
interface names according to the "alt_interface_names" mapping.
1600
Usage:
1601
1602
@alternate_dbus_interfaces({"org.example.Interface":
1603
"net.example.AlternateInterface"})
1604
class SampleDBusObject(dbus.service.Object):
1605
@dbus.service.method("org.example.Interface")
1606
def SampleDBusMethod():
1607
pass
1608
1609
The above "SampleDBusMethod" on "SampleDBusObject" will be
1610
reachable via two interfaces: "org.example.Interface" and
1611
"net.example.AlternateInterface", the latter of which will have
1612
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1613
"true", unless "deprecate" is passed with a False value.
1614
1615
This works for methods and signals, and also for D-Bus properties
1616
(from DBusObjectWithProperties) and interfaces (from the
1617
dbus_interface_annotations decorator).
1618
"""
1619
1620
def wrapper(cls):
1621
for orig_interface_name, alt_interface_name in (
1622
alt_interface_names.items()):
1623
attr = {}
1624
interface_names = set()
1625
# Go though all attributes of the class
1626
for attrname, attribute in inspect.getmembers(cls):
1627
# Ignore non-D-Bus attributes, and D-Bus attributes
1628
# with the wrong interface name
1629
if (not hasattr(attribute, "_dbus_interface")
1630
or not attribute._dbus_interface.startswith(
1631
orig_interface_name)):
1632
continue
1633
# Create an alternate D-Bus interface name based on
1634
# the current name
1635
alt_interface = attribute._dbus_interface.replace(
1636
orig_interface_name, alt_interface_name)
1637
interface_names.add(alt_interface)
1638
# Is this a D-Bus signal?
1639
if getattr(attribute, "_dbus_is_signal", False):
1640
# Extract the original non-method undecorated
1641
# function by black magic
1642
if sys.version_info.major == 2:
1643
nonmethod_func = (dict(
1644
zip(attribute.func_code.co_freevars,
1645
attribute.__closure__))
1646
["func"].cell_contents)
1647
else:
1648
nonmethod_func = (dict(
1649
zip(attribute.__code__.co_freevars,
1650
attribute.__closure__))
1651
["func"].cell_contents)
1652
# Create a new, but exactly alike, function
1653
# object, and decorate it to be a new D-Bus signal
1654
# with the alternate D-Bus interface name
1655
new_function = copy_function(nonmethod_func)
1656
new_function = (dbus.service.signal(
1657
alt_interface,
1658
attribute._dbus_signature)(new_function))
1659
# Copy annotations, if any
1660
try:
1661
new_function._dbus_annotations = dict(
1662
attribute._dbus_annotations)
1663
except AttributeError:
1664
pass
1665
1666
# Define a creator of a function to call both the
1667
# original and alternate functions, so both the
1668
# original and alternate signals gets sent when
1669
# the function is called
1670
def fixscope(func1, func2):
1671
"""This function is a scope container to pass
1672
func1 and func2 to the "call_both" function
1673
outside of its arguments"""
1674
1675
@functools.wraps(func2)
1676
def call_both(*args, **kwargs):
1677
"""This function will emit two D-Bus
1678
signals by calling func1 and func2"""
1679
func1(*args, **kwargs)
1680
func2(*args, **kwargs)
1681
# Make wrapper function look like a D-Bus
1682
# signal
1683
for name, attr in inspect.getmembers(func2):
1684
if name.startswith("_dbus_"):
1685
setattr(call_both, name, attr)
1686
1687
return call_both
1688
# Create the "call_both" function and add it to
1689
# the class
1690
attr[attrname] = fixscope(attribute, new_function)
1691
# Is this a D-Bus method?
1692
elif getattr(attribute, "_dbus_is_method", False):
1693
# Create a new, but exactly alike, function
1694
# object. Decorate it to be a new D-Bus method
1695
# with the alternate D-Bus interface name. Add it
1696
# to the class.
1697
attr[attrname] = (
1698
dbus.service.method(
1699
alt_interface,
1700
attribute._dbus_in_signature,
1701
attribute._dbus_out_signature)
1702
(copy_function(attribute)))
1703
# Copy annotations, if any
1704
try:
1705
attr[attrname]._dbus_annotations = dict(
1706
attribute._dbus_annotations)
1707
except AttributeError:
1708
pass
1709
# Is this a D-Bus property?
1710
elif getattr(attribute, "_dbus_is_property", False):
1711
# Create a new, but exactly alike, function
1712
# object, and decorate it to be a new D-Bus
1713
# property with the alternate D-Bus interface
1714
# name. Add it to the class.
1715
attr[attrname] = (dbus_service_property(
1716
alt_interface, attribute._dbus_signature,
1717
attribute._dbus_access,
1718
attribute._dbus_get_args_options
1719
["byte_arrays"])
1720
(copy_function(attribute)))
1721
# Copy annotations, if any
1722
try:
1723
attr[attrname]._dbus_annotations = dict(
1724
attribute._dbus_annotations)
1725
except AttributeError:
1726
pass
1727
# Is this a D-Bus interface?
1728
elif getattr(attribute, "_dbus_is_interface", False):
1729
# Create a new, but exactly alike, function
1730
# object. Decorate it to be a new D-Bus interface
1731
# with the alternate D-Bus interface name. Add it
1732
# to the class.
1733
attr[attrname] = (
1734
dbus_interface_annotations(alt_interface)
1735
(copy_function(attribute)))
1736
if deprecate:
1737
# Deprecate all alternate interfaces
1738
iname = "_AlternateDBusNames_interface_annotation{}"
1739
for interface_name in interface_names:
1740
1741
@dbus_interface_annotations(interface_name)
1742
def func(self):
1743
return {"org.freedesktop.DBus.Deprecated":
1744
"true"}
1745
# Find an unused name
1746
for aname in (iname.format(i)
1747
for i in itertools.count()):
1748
if aname not in attr:
1749
attr[aname] = func
1750
break
1751
if interface_names:
1752
# Replace the class with a new subclass of it with
1753
# methods, signals, etc. as created above.
1754
if sys.version_info.major == 2:
1755
cls = type(b"{}Alternate".format(cls.__name__),
1756
(cls, ), attr)
1757
else:
1758
cls = type("{}Alternate".format(cls.__name__),
1759
(cls, ), attr)
1760
return cls
1761
1762
return wrapper
1763
1764
1765
@alternate_dbus_interfaces({"se.recompile.Mandos":
1766
"se.bsnet.fukt.Mandos"})
756
return dbus.String("", variant_level = variant_level)
757
return dbus.String(dt.isoformat(),
758
variant_level=variant_level)
759
1767
760
class ClientDBus(Client, DBusObjectWithProperties):
1768
761
"""A Client class using D-Bus
1769
762
1770
763
Attributes:
1771
764
dbus_object_path: dbus.ObjectPath
1772
765
bus: dbus.SystemBus()
1773
766
"""
1774
767
1775
768
runtime_expansions = (Client.runtime_expansions
1776
+ ("dbus_object_path", ))
1777
1778
_interface = "se.recompile.Mandos.Client"
1779
769
+ ("dbus_object_path",))
770
1780
771
# dbus.service.Object doesn't use super(), so we can't either.
1781
1782
def __init__(self, bus=None, *args, **kwargs):
772
773
def __init__(self, bus = None, *args, **kwargs):
774
self._approvals_pending = 0
1783
775
self.bus = bus
1784
776
Client.__init__(self, *args, **kwargs)
1785
777
# Only now, when this client is initialized, can it show up on
1786
778
# the D-Bus
1787
client_object_name = str(self.name).translate(
779
client_object_name = unicode(self.name).translate(
1788
780
{ord("."): ord("_"),
1789
781
ord("-"): ord("_")})
1790
self.dbus_object_path = dbus.ObjectPath(
1791
"/clients/" + client_object_name)
782
self.dbus_object_path = (dbus.ObjectPath
783
("/clients/" + client_object_name))
1792
784
DBusObjectWithProperties.__init__(self, self.bus,
1793
785
self.dbus_object_path)
1794
1795
def notifychangeproperty(transform_func, dbus_name,
1796
type_func=lambda x: x,
1797
variant_level=1,
1798
invalidate_only=False,
1799
_interface=_interface):
1800
""" Modify a variable so that it's a property which announces
1801
its changes to DBus.
1802
1803
transform_fun: Function that takes a value and a variant_level
1804
and transforms it to a D-Bus type.
1805
dbus_name: D-Bus name of the variable
786
787
def notifychangeproperty(transform_func,
788
dbus_name, type_func=lambda x: x,
789
variant_level=1):
790
""" Modify a variable so that its a property that announce its
791
changes to DBus.
792
transform_fun: Function that takes a value and transform it to
793
DBus type.
794
dbus_name: DBus name of the variable
1806
795
type_func: Function that transform the value before sending it
1807
to the D-Bus. Default: no transform
1808
variant_level: D-Bus variant level. Default: 1
796
to DBus
797
variant_level: DBus variant level. default: 1
1809
798
"""
1810
attrname = "_{}".format(dbus_name)
1811
799
real_value = [None,]
1812
800
def setter(self, value):
801
old_value = real_value[0]
802
real_value[0] = value
1813
803
if hasattr(self, "dbus_object_path"):
1814
if (not hasattr(self, attrname) or
1815
type_func(getattr(self, attrname, None))
1816
!= type_func(value)):
1817
if invalidate_only:
1818
self.PropertiesChanged(
1819
_interface, dbus.Dictionary(),
1820
dbus.Array((dbus_name, )))
1821
else:
1822
dbus_value = transform_func(
1823
type_func(value),
1824
variant_level=variant_level)
1825
self.PropertyChanged(dbus.String(dbus_name),
1826
dbus_value)
1827
self.PropertiesChanged(
1828
_interface,
1829
dbus.Dictionary({dbus.String(dbus_name):
1830
dbus_value}),
1831
dbus.Array())
1832
setattr(self, attrname, value)
1833
1834
return property(lambda self: getattr(self, attrname), setter)
804
if type_func(old_value) != type_func(real_value[0]):
805
dbus_value = transform_func(type_func(real_value[0]),
806
variant_level)
807
self.PropertyChanged(dbus.String(dbus_name),
808
dbus_value)
809
810
return property(lambda self: real_value[0], setter)
811
1835
812
1836
813
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1837
814
approvals_pending = notifychangeproperty(dbus.Boolean,
1838
815
"ApprovalPending",
1839
type_func=bool)
816
type_func = bool)
1840
817
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1841
818
last_enabled = notifychangeproperty(datetime_to_dbus,
1842
819
"LastEnabled")
1843
checker = notifychangeproperty(
1844
dbus.Boolean, "CheckerRunning",
1845
type_func=lambda checker: checker is not None)
820
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
821
type_func = lambda checker: checker is not None)
1846
822
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1847
823
"LastCheckedOK")
1848
last_checker_status = notifychangeproperty(dbus.Int16,
1849
"LastCheckerStatus")
1850
last_approval_request = notifychangeproperty(
1851
datetime_to_dbus, "LastApprovalRequest")
824
last_approval_request = notifychangeproperty(datetime_to_dbus,
825
"LastApprovalRequest")
1852
826
approved_by_default = notifychangeproperty(dbus.Boolean,
1853
827
"ApprovedByDefault")
1854
approval_delay = notifychangeproperty(
1855
dbus.UInt64, "ApprovalDelay",
1856
type_func=lambda td: td.total_seconds() * 1000)
1857
approval_duration = notifychangeproperty(
1858
dbus.UInt64, "ApprovalDuration",
1859
type_func=lambda td: td.total_seconds() * 1000)
828
approval_delay = notifychangeproperty(dbus.UInt16, "ApprovalDelay",
829
type_func = _timedelta_to_milliseconds)
830
approval_duration = notifychangeproperty(dbus.UInt16, "ApprovalDuration",
831
type_func = _timedelta_to_milliseconds)
1860
832
host = notifychangeproperty(dbus.String, "Host")
1861
timeout = notifychangeproperty(
1862
dbus.UInt64, "Timeout",
1863
type_func=lambda td: td.total_seconds() * 1000)
1864
extended_timeout = notifychangeproperty(
1865
dbus.UInt64, "ExtendedTimeout",
1866
type_func=lambda td: td.total_seconds() * 1000)
1867
interval = notifychangeproperty(
1868
dbus.UInt64, "Interval",
1869
type_func=lambda td: td.total_seconds() * 1000)
833
timeout = notifychangeproperty(dbus.UInt16, "Timeout",
834
type_func = _timedelta_to_milliseconds)
835
extended_timeout = notifychangeproperty(dbus.UInt16, "ExtendedTimeout",
836
type_func = _timedelta_to_milliseconds)
837
interval = notifychangeproperty(dbus.UInt16, "Interval",
838
type_func = _timedelta_to_milliseconds)
1870
839
checker_command = notifychangeproperty(dbus.String, "Checker")
1871
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1872
invalidate_only=True)
1873
840
1874
841
del notifychangeproperty
1875
842
1876
843
def __del__(self, *args, **kwargs):
1877
844
try:
1878
845
self.remove_from_connection()
1881
848
if hasattr(DBusObjectWithProperties, "__del__"):
1882
849
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1883
850
Client.__del__(self, *args, **kwargs)
1884
1885
def checker_callback(self, source, condition,
1886
connection, command, *args, **kwargs):
1887
ret = Client.checker_callback(self, source, condition,
1888
connection, command, *args,
1889
**kwargs)
1890
exitstatus = self.last_checker_status
1891
if exitstatus >= 0:
851
852
def checker_callback(self, pid, condition, command,
853
*args, **kwargs):
854
self.checker_callback_tag = None
855
self.checker = None
856
if os.WIFEXITED(condition):
857
exitstatus = os.WEXITSTATUS(condition)
1892
858
# Emit D-Bus signal
1893
859
self.CheckerCompleted(dbus.Int16(exitstatus),
1894
# This is specific to GNU libC
1895
dbus.Int64(exitstatus << 8),
860
dbus.Int64(condition),
1896
861
dbus.String(command))
1897
862
else:
1898
863
# Emit D-Bus signal
1899
864
self.CheckerCompleted(dbus.Int16(-1),
1900
dbus.Int64(
1901
# This is specific to GNU libC
1902
(exitstatus << 8)
1903
| self.last_checker_signal),
865
dbus.Int64(condition),
1904
866
dbus.String(command))
1905
return ret
867
868
return Client.checker_callback(self, pid, condition, command,
869
*args, **kwargs)
1906
870
1907
871
def start_checker(self, *args, **kwargs):
1908
old_checker_pid = getattr(self.checker, "pid", None)
872
old_checker = self.checker
873
if self.checker is not None:
874
old_checker_pid = self.checker.pid
875
else:
876
old_checker_pid = None
1909
877
r = Client.start_checker(self, *args, **kwargs)
1910
878
# Only if new checker process was started
1911
879
if (self.checker is not None
1913
881
# Emit D-Bus signal
1914
882
self.CheckerStarted(self.current_checker_command)
1915
883
return r
1916
884
1917
885
def _reset_approved(self):
1918
self.approved = None
886
self._approved = None
1919
887
return False
1920
888
1921
889
def approve(self, value=True):
1922
self.approved = value
1923
GLib.timeout_add(int(self.approval_duration.total_seconds()
1924
* 1000), self._reset_approved)
1925
890
self.send_changedstate()
1926
1927
# D-Bus methods, signals & properties
1928
1929
# Interfaces
1930
1931
# Signals
1932
891
self._approved = value
892
gobject.timeout_add(_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
1933
902
# CheckerCompleted - signal
1934
903
@dbus.service.signal(_interface, signature="nxs")
1935
904
def CheckerCompleted(self, exitcode, waitstatus, command):
1936
905
"D-Bus signal"
1937
906
pass
1938
907
1939
908
# CheckerStarted - signal
1940
909
@dbus.service.signal(_interface, signature="s")
1941
910
def CheckerStarted(self, command):
1942
911
"D-Bus signal"
1943
912
pass
1944
913
1945
914
# PropertyChanged - signal
1946
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1947
915
@dbus.service.signal(_interface, signature="sv")
1948
916
def PropertyChanged(self, property, value):
1949
917
"D-Bus signal"
1950
918
pass
1951
919
1952
920
# GotSecret - signal
1953
921
@dbus.service.signal(_interface)
1954
922
def GotSecret(self):
1957
925
server to mandos-client
1958
926
"""
1959
927
pass
1960
928
1961
929
# Rejected - signal
1962
930
@dbus.service.signal(_interface, signature="s")
1963
931
def Rejected(self, reason):
1964
932
"D-Bus signal"
1965
933
pass
1966
934
1967
935
# NeedApproval - signal
1968
936
@dbus.service.signal(_interface, signature="tb")
1969
937
def NeedApproval(self, timeout, default):
1970
938
"D-Bus signal"
1971
939
return self.need_approval()
1972
1973
# Methods
1974
940
941
## Methods
942
1975
943
# Approve - method
1976
944
@dbus.service.method(_interface, in_signature="b")
1977
945
def Approve(self, value):
1978
946
self.approve(value)
1979
947
1980
948
# CheckedOK - method
1981
949
@dbus.service.method(_interface)
1982
950
def CheckedOK(self):
1983
951
self.checked_ok()
1984
952
1985
953
# Enable - method
1986
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1987
954
@dbus.service.method(_interface)
1988
955
def Enable(self):
1989
956
"D-Bus method"
1990
957
self.enable()
1991
958
1992
959
# StartChecker - method
1993
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1994
960
@dbus.service.method(_interface)
1995
961
def StartChecker(self):
1996
962
"D-Bus method"
1997
963
self.start_checker()
1998
964
1999
965
# Disable - method
2000
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
2001
966
@dbus.service.method(_interface)
2002
967
def Disable(self):
2003
968
"D-Bus method"
2004
969
self.disable()
2005
970
2006
971
# StopChecker - method
2007
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
2008
972
@dbus.service.method(_interface)
2009
973
def StopChecker(self):
2010
974
self.stop_checker()
2011
2012
# Properties
2013
975
976
## Properties
977
2014
978
# ApprovalPending - property
2015
979
@dbus_service_property(_interface, signature="b", access="read")
2016
980
def ApprovalPending_dbus_property(self):
2017
981
return dbus.Boolean(bool(self.approvals_pending))
2018
982
2019
983
# ApprovedByDefault - property
2020
@dbus_service_property(_interface,
2021
signature="b",
984
@dbus_service_property(_interface, signature="b",
2022
985
access="readwrite")
2023
986
def ApprovedByDefault_dbus_property(self, value=None):
2024
987
if value is None: # get
2025
988
return dbus.Boolean(self.approved_by_default)
2026
989
self.approved_by_default = bool(value)
2027
990
2028
991
# ApprovalDelay - property
2029
@dbus_service_property(_interface,
2030
signature="t",
992
@dbus_service_property(_interface, signature="t",
2031
993
access="readwrite")
2032
994
def ApprovalDelay_dbus_property(self, value=None):
2033
995
if value is None: # get
2034
return dbus.UInt64(self.approval_delay.total_seconds()
2035
* 1000)
996
return dbus.UInt64(self.approval_delay_milliseconds())
2036
997
self.approval_delay = datetime.timedelta(0, 0, 0, value)
2037
998
2038
999
# ApprovalDuration - property
2039
@dbus_service_property(_interface,
2040
signature="t",
1000
@dbus_service_property(_interface, signature="t",
2041
1001
access="readwrite")
2042
1002
def ApprovalDuration_dbus_property(self, value=None):
2043
1003
if value is None: # get
2044
return dbus.UInt64(self.approval_duration.total_seconds()
2045
* 1000)
1004
return dbus.UInt64(_timedelta_to_milliseconds(
1005
self.approval_duration))
2046
1006
self.approval_duration = datetime.timedelta(0, 0, 0, value)
2047
1007
2048
1008
# Name - property
2049
@dbus_annotations(
2050
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2051
1009
@dbus_service_property(_interface, signature="s", access="read")
2052
1010
def Name_dbus_property(self):
2053
1011
return dbus.String(self.name)
2054
2055
# KeyID - property
2056
@dbus_annotations(
2057
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2058
@dbus_service_property(_interface, signature="s", access="read")
2059
def KeyID_dbus_property(self):
2060
return dbus.String(self.key_id)
2061
1012
2062
1013
# Fingerprint - property
2063
@dbus_annotations(
2064
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2065
1014
@dbus_service_property(_interface, signature="s", access="read")
2066
1015
def Fingerprint_dbus_property(self):
2067
1016
return dbus.String(self.fingerprint)
2068
1017
2069
1018
# Host - property
2070
@dbus_service_property(_interface,
2071
signature="s",
1019
@dbus_service_property(_interface, signature="s",
2072
1020
access="readwrite")
2073
1021
def Host_dbus_property(self, value=None):
2074
1022
if value is None: # get
2075
1023
return dbus.String(self.host)
2076
self.host = str(value)
2077
1024
self.host = value
1025
2078
1026
# Created - property
2079
@dbus_annotations(
2080
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2081
1027
@dbus_service_property(_interface, signature="s", access="read")
2082
1028
def Created_dbus_property(self):
2083
return datetime_to_dbus(self.created)
2084
1029
return dbus.String(datetime_to_dbus(self.created))
1030
2085
1031
# LastEnabled - property
2086
1032
@dbus_service_property(_interface, signature="s", access="read")
2087
1033
def LastEnabled_dbus_property(self):
2088
1034
return datetime_to_dbus(self.last_enabled)
2089
1035
2090
1036
# Enabled - property
2091
@dbus_service_property(_interface,
2092
signature="b",
1037
@dbus_service_property(_interface, signature="b",
2093
1038
access="readwrite")
2094
1039
def Enabled_dbus_property(self, value=None):
2095
1040
if value is None: # get
2098
1043
self.enable()
2099
1044
else:
2100
1045
self.disable()
2101
1046
2102
1047
# LastCheckedOK - property
2103
@dbus_service_property(_interface,
2104
signature="s",
1048
@dbus_service_property(_interface, signature="s",
2105
1049
access="readwrite")
2106
1050
def LastCheckedOK_dbus_property(self, value=None):
2107
1051
if value is not None:
2108
1052
self.checked_ok()
2109
1053
return
2110
1054
return datetime_to_dbus(self.last_checked_ok)
2111
2112
# LastCheckerStatus - property
2113
@dbus_service_property(_interface, signature="n", access="read")
2114
def LastCheckerStatus_dbus_property(self):
2115
return dbus.Int16(self.last_checker_status)
2116
1055
2117
1056
# Expires - property
2118
1057
@dbus_service_property(_interface, signature="s", access="read")
2119
1058
def Expires_dbus_property(self):
2120
1059
return datetime_to_dbus(self.expires)
2121
1060
2122
1061
# LastApprovalRequest - property
2123
1062
@dbus_service_property(_interface, signature="s", access="read")
2124
1063
def LastApprovalRequest_dbus_property(self):
2125
1064
return datetime_to_dbus(self.last_approval_request)
2126
1065
2127
1066
# Timeout - property
2128
@dbus_service_property(_interface,
2129
signature="t",
1067
@dbus_service_property(_interface, signature="t",
2130
1068
access="readwrite")
2131
1069
def Timeout_dbus_property(self, value=None):
2132
1070
if value is None: # get
2133
return dbus.UInt64(self.timeout.total_seconds() * 1000)
2134
old_timeout = self.timeout
1071
return dbus.UInt64(self.timeout_milliseconds())
2135
1072
self.timeout = datetime.timedelta(0, 0, 0, value)
2136
# Reschedule disabling
2137
if self.enabled:
2138
now = datetime.datetime.utcnow()
2139
self.expires += self.timeout - old_timeout
2140
if self.expires <= now:
2141
# The timeout has passed
2142
self.disable()
2143
else:
2144
if (getattr(self, "disable_initiator_tag", None)
2145
is None):
2146
return
2147
GLib.source_remove(self.disable_initiator_tag)
2148
self.disable_initiator_tag = GLib.timeout_add(
2149
int((self.expires - now).total_seconds() * 1000),
2150
self.disable)
1073
if getattr(self, "disable_initiator_tag", None) is None:
1074
return
1075
# Reschedule timeout
1076
gobject.source_remove(self.disable_initiator_tag)
1077
self.disable_initiator_tag = None
1078
self.expires = None
1079
time_to_die = (self.
1080
_timedelta_to_milliseconds((self
1081
.last_checked_ok
1082
+ self.timeout)
1083
- datetime.datetime
1084
.utcnow()))
1085
if time_to_die <= 0:
1086
# The timeout has passed
1087
self.disable()
1088
else:
1089
self.expires = (datetime.datetime.utcnow()
1090
+ datetime.timedelta(milliseconds = time_to_die))
1091
self.disable_initiator_tag = (gobject.timeout_add
1092
(time_to_die, self.disable))
2151
1093
2152
1094
# ExtendedTimeout - property
2153
@dbus_service_property(_interface,
2154
signature="t",
1095
@dbus_service_property(_interface, signature="t",
2155
1096
access="readwrite")
2156
1097
def ExtendedTimeout_dbus_property(self, value=None):
2157
1098
if value is None: # get
2158
return dbus.UInt64(self.extended_timeout.total_seconds()
2159
* 1000)
1099
return dbus.UInt64(self.extended_timeout_milliseconds())
2160
1100
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
2161
1101
2162
1102
# Interval - property
2163
@dbus_service_property(_interface,
2164
signature="t",
1103
@dbus_service_property(_interface, signature="t",
2165
1104
access="readwrite")
2166
1105
def Interval_dbus_property(self, value=None):
2167
1106
if value is None: # get
2168
return dbus.UInt64(self.interval.total_seconds() * 1000)
1107
return dbus.UInt64(self.interval_milliseconds())
2169
1108
self.interval = datetime.timedelta(0, 0, 0, value)
2170
1109
if getattr(self, "checker_initiator_tag", None) is None:
2171
1110
return
2172
if self.enabled:
2173
# Reschedule checker run
2174
GLib.source_remove(self.checker_initiator_tag)
2175
self.checker_initiator_tag = GLib.timeout_add(
2176
value, self.start_checker)
2177
self.start_checker() # Start one now, too
1111
# Reschedule checker run
1112
gobject.source_remove(self.checker_initiator_tag)
1113
self.checker_initiator_tag = (gobject.timeout_add
1114
(value, self.start_checker))
1115
self.start_checker() # Start one now, too
2178
1116
2179
1117
# Checker - property
2180
@dbus_service_property(_interface,
2181
signature="s",
1118
@dbus_service_property(_interface, signature="s",
2182
1119
access="readwrite")
2183
1120
def Checker_dbus_property(self, value=None):
2184
1121
if value is None: # get
2185
1122
return dbus.String(self.checker_command)
2186
self.checker_command = str(value)
2187
1123
self.checker_command = value
1124
2188
1125
# CheckerRunning - property
2189
@dbus_service_property(_interface,
2190
signature="b",
1126
@dbus_service_property(_interface, signature="b",
2191
1127
access="readwrite")
2192
1128
def CheckerRunning_dbus_property(self, value=None):
2193
1129
if value is None: # get
2196
1132
self.start_checker()
2197
1133
else:
2198
1134
self.stop_checker()
2199
1135
2200
1136
# ObjectPath - property
2201
@dbus_annotations(
2202
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
2203
"org.freedesktop.DBus.Deprecated": "true"})
2204
1137
@dbus_service_property(_interface, signature="o", access="read")
2205
1138
def ObjectPath_dbus_property(self):
2206
return self.dbus_object_path # is already a dbus.ObjectPath
2207
1139
return self.dbus_object_path # is already a dbus.ObjectPath
1140
2208
1141
# Secret = property
2209
@dbus_annotations(
2210
{"org.freedesktop.DBus.Property.EmitsChangedSignal":
2211
"invalidates"})
2212
@dbus_service_property(_interface,
2213
signature="ay",
2214
access="write",
2215
byte_arrays=True)
1142
@dbus_service_property(_interface, signature="ay",
1143
access="write", byte_arrays=True)
2216
1144
def Secret_dbus_property(self, value):
2217
self.secret = bytes(value)
2218
1145
self.secret = str(value)
1146
2219
1147
del _interface
2220
1148
2221
1149
2222
1150
class ProxyClient(object):
2223
def __init__(self, child_pipe, key_id, fpr, address):
1151
def __init__(self, child_pipe, fpr, address):
2224
1152
self._pipe = child_pipe
2225
self._pipe.send(('init', key_id, fpr, address))
1153
self._pipe.send(('init', fpr, address))
2226
1154
if not self._pipe.recv():
2227
raise KeyError(key_id or fpr)
1155
raise KeyError()
2228
1156
2229
1157
def __getattribute__(self, name):
2230
if name == '_pipe':
1158
if(name == '_pipe'):
2231
1159
return super(ProxyClient, self).__getattribute__(name)
2232
1160
self._pipe.send(('getattr', name))
2233
1161
data = self._pipe.recv()
2234
1162
if data[0] == 'data':
2235
1163
return data[1]
2236
1164
if data[0] == 'function':
2237
2238
1165
def func(*args, **kwargs):
2239
1166
self._pipe.send(('funcall', name, args, kwargs))
2240
1167
return self._pipe.recv()[1]
2241
2242
1168
return func
2243
1169
2244
1170
def __setattr__(self, name, value):
2245
if name == '_pipe':
1171
if(name == '_pipe'):
2246
1172
return super(ProxyClient, self).__setattr__(name, value)
2247
1173
self._pipe.send(('setattr', name, value))
2248
1174
2249
1175
2250
1176
class ClientHandler(socketserver.BaseRequestHandler, object):
2251
1177
"""A class to handle client connections.
2252
1178
2253
1179
Instantiated once for each connection to handle it.
2254
1180
Note: This will run in its own forked process."""
2255
1181
2256
1182
def handle(self):
2257
1183
with contextlib.closing(self.server.child_pipe) as child_pipe:
2258
1184
logger.info("TCP connection from: %s",
2259
str(self.client_address))
1185
unicode(self.client_address))
2260
1186
logger.debug("Pipe FD: %d",
2261
1187
self.server.child_pipe.fileno())
2262
1188
2263
session = gnutls.ClientSession(self.request)
2264
2265
# priority = ':'.join(("NONE", "+VERS-TLS1.1",
2266
# "+AES-256-CBC", "+SHA1",
2267
# "+COMP-NULL", "+CTYPE-OPENPGP",
2268
# "+DHE-DSS"))
1189
session = (gnutls.connection
1190
.ClientSession(self.request,
1191
gnutls.connection
1192
.X509Credentials()))
1193
1194
# Note: gnutls.connection.X509Credentials is really a
1195
# generic GnuTLS certificate credentials object so long as
1196
# no X.509 keys are added to it. Therefore, we can use it
1197
# here despite using OpenPGP certificates.
1198
1199
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1200
# "+AES-256-CBC", "+SHA1",
1201
# "+COMP-NULL", "+CTYPE-OPENPGP",
1202
# "+DHE-DSS"))
2269
1203
# Use a fallback default, since this MUST be set.
2270
1204
priority = self.server.gnutls_priority
2271
1205
if priority is None:
2272
1206
priority = "NORMAL"
2273
gnutls.priority_set_direct(session._c_object,
2274
priority.encode("utf-8"),
2275
None)
1207
(gnutls.library.functions
1208
.gnutls_priority_set_direct(session._c_object,
1209
priority, None))
2276
1210
2277
1211
# Start communication using the Mandos protocol
2278
1212
# Get protocol number
2280
1214
logger.debug("Protocol version: %r", line)
2281
1215
try:
2282
1216
if int(line.strip().split()[0]) > 1:
2283
raise RuntimeError(line)
1217
raise RuntimeError
2284
1218
except (ValueError, IndexError, RuntimeError) as error:
2285
1219
logger.error("Unknown protocol version: %s", error)
2286
1220
return
2288
1222
# Start GnuTLS connection
2289
1223
try:
2290
1224
session.handshake()
2291
except gnutls.Error as error:
1225
except gnutls.errors.GNUTLSError as error:
2292
1226
logger.warning("Handshake failed: %s", error)
2293
1227
# Do not run session.bye() here: the session is not
2294
1228
# established. Just abandon the request.
2297
1231
2298
1232
approval_required = False
2299
1233
try:
2300
if gnutls.has_rawpk:
2301
fpr = ""
2302
try:
2303
key_id = self.key_id(
2304
self.peer_certificate(session))
2305
except (TypeError, gnutls.Error) as error:
2306
logger.warning("Bad certificate: %s", error)
2307
return
2308
logger.debug("Key ID: %s", key_id)
2309
2310
else:
2311
key_id = ""
2312
try:
2313
fpr = self.fingerprint(
2314
self.peer_certificate(session))
2315
except (TypeError, gnutls.Error) as error:
2316
logger.warning("Bad certificate: %s", error)
2317
return
2318
logger.debug("Fingerprint: %s", fpr)
2319
2320
try:
2321
client = ProxyClient(child_pipe, key_id, fpr,
1234
try:
1235
fpr = self.fingerprint(self.peer_certificate
1236
(session))
1237
except (TypeError,
1238
gnutls.errors.GNUTLSError) as error:
1239
logger.warning("Bad certificate: %s", error)
1240
return
1241
logger.debug("Fingerprint: %s", fpr)
1242
1243
try:
1244
client = ProxyClient(child_pipe, fpr,
2322
1245
self.client_address)
2323
1246
except KeyError:
2324
1247
return
2325
1248
2326
1249
if client.approval_delay:
2327
1250
delay = client.approval_delay
2328
1251
client.approvals_pending += 1
2329
1252
approval_required = True
2330
1253
2331
1254
while True:
2332
1255
if not client.enabled:
2333
1256
logger.info("Client %s is disabled",
2334
client.name)
1257
client.name)
2335
1258
if self.server.use_dbus:
2336
1259
# Emit D-Bus signal
2337
client.Rejected("Disabled")
1260
client.Rejected("Disabled")
2338
1261
return
2339
2340
if client.approved or not client.approval_delay:
2341
# We are approved or approval is disabled
1262
1263
if client._approved or not client.approval_delay:
1264
#We are approved or approval is disabled
2342
1265
break
2343
elif client.approved is None:
1266
elif client._approved is None:
2344
1267
logger.info("Client %s needs approval",
2345
1268
client.name)
2346
1269
if self.server.use_dbus:
2347
1270
# Emit D-Bus signal
2348
1271
client.NeedApproval(
2349
client.approval_delay.total_seconds()
2350
* 1000, client.approved_by_default)
1272
client.approval_delay_milliseconds(),
1273
client.approved_by_default)
2351
1274
else:
2352
1275
logger.warning("Client %s was not approved",
2353
1276
client.name)
2355
1278
# Emit D-Bus signal
2356
1279
client.Rejected("Denied")
2357
1280
return
2358
2359
# wait until timeout or approved
1281
1282
#wait until timeout or approved
1283
#x = float(client._timedelta_to_milliseconds(delay))
2360
1284
time = datetime.datetime.now()
2361
1285
client.changedstate.acquire()
2362
client.changedstate.wait(delay.total_seconds())
1286
client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))
2363
1287
client.changedstate.release()
2364
1288
time2 = datetime.datetime.now()
2365
1289
if (time2 - time) >= delay:
2375
1299
break
2376
1300
else:
2377
1301
delay -= time2 - time
2378
2379
try:
2380
session.send(client.secret)
2381
except gnutls.Error as error:
2382
logger.warning("gnutls send failed",
2383
exc_info=error)
2384
return
1302
1303
sent_size = 0
1304
while sent_size < len(client.secret):
1305
try:
1306
sent = session.send(client.secret[sent_size:])
1307
except gnutls.errors.GNUTLSError as error:
1308
logger.warning("gnutls send failed")
1309
return
1310
logger.debug("Sent: %d, remaining: %d",
1311
sent, len(client.secret)
1312
- (sent_size + sent))
1313
sent_size += sent
2385
1314
2386
1315
logger.info("Sending secret to %s", client.name)
2387
# bump the timeout using extended_timeout
2388
client.bump_timeout(client.extended_timeout)
1316
# bump the timeout as if seen
1317
client.checked_ok(client.extended_timeout)
2389
1318
if self.server.use_dbus:
2390
1319
# Emit D-Bus signal
2391
1320
client.GotSecret()
2392
1321
2393
1322
finally:
2394
1323
if approval_required:
2395
1324
client.approvals_pending -= 1
2396
1325
try:
2397
1326
session.bye()
2398
except gnutls.Error as error:
2399
logger.warning("GnuTLS bye failed",
2400
exc_info=error)
2401
1327
except gnutls.errors.GNUTLSError as error:
1328
logger.warning("GnuTLS bye failed")
1329
2402
1330
@staticmethod
2403
1331
def peer_certificate(session):
2404
"Return the peer's certificate as a bytestring"
2405
try:
2406
cert_type = gnutls.certificate_type_get2(session._c_object,
2407
gnutls.CTYPE_PEERS)
2408
except AttributeError:
2409
cert_type = gnutls.certificate_type_get(session._c_object)
2410
if gnutls.has_rawpk:
2411
valid_cert_types = frozenset((gnutls.CRT_RAWPK,))
2412
else:
2413
valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))
2414
# If not a valid certificate type...
2415
if cert_type not in valid_cert_types:
2416
logger.info("Cert type %r not in %r", cert_type,
2417
valid_cert_types)
2418
# ...return invalid data
2419
return b""
1332
"Return the peer's OpenPGP certificate as a bytestring"
1333
# If not an OpenPGP certificate...
1334
if (gnutls.library.functions
1335
.gnutls_certificate_type_get(session._c_object)
1336
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1337
# ...do the normal thing
1338
return session.peer_certificate
2420
1339
list_size = ctypes.c_uint(1)
2421
cert_list = (gnutls.certificate_get_peers
1340
cert_list = (gnutls.library.functions
1341
.gnutls_certificate_get_peers
2422
1342
(session._c_object, ctypes.byref(list_size)))
2423
1343
if not bool(cert_list) and list_size.value != 0:
2424
raise gnutls.Error("error getting peer certificate")
1344
raise gnutls.errors.GNUTLSError("error getting peer"
1345
" certificate")
2425
1346
if list_size.value == 0:
2426
1347
return None
2427
1348
cert = cert_list[0]
2428
1349
return ctypes.string_at(cert.data, cert.size)
2429
2430
@staticmethod
2431
def key_id(certificate):
2432
"Convert a certificate bytestring to a hexdigit key ID"
2433
# New GnuTLS "datum" with the public key
2434
datum = gnutls.datum_t(
2435
ctypes.cast(ctypes.c_char_p(certificate),
2436
ctypes.POINTER(ctypes.c_ubyte)),
2437
ctypes.c_uint(len(certificate)))
2438
# XXX all these need to be created in the gnutls "module"
2439
# New empty GnuTLS certificate
2440
pubkey = gnutls.pubkey_t()
2441
gnutls.pubkey_init(ctypes.byref(pubkey))
2442
# Import the raw public key into the certificate
2443
gnutls.pubkey_import(pubkey,
2444
ctypes.byref(datum),
2445
gnutls.X509_FMT_DER)
2446
# New buffer for the key ID
2447
buf = ctypes.create_string_buffer(32)
2448
buf_len = ctypes.c_size_t(len(buf))
2449
# Get the key ID from the raw public key into the buffer
2450
gnutls.pubkey_get_key_id(pubkey,
2451
gnutls.KEYID_USE_SHA256,
2452
ctypes.cast(ctypes.byref(buf),
2453
ctypes.POINTER(ctypes.c_ubyte)),
2454
ctypes.byref(buf_len))
2455
# Deinit the certificate
2456
gnutls.pubkey_deinit(pubkey)
2457
2458
# Convert the buffer to a Python bytestring
2459
key_id = ctypes.string_at(buf, buf_len.value)
2460
# Convert the bytestring to hexadecimal notation
2461
hex_key_id = binascii.hexlify(key_id).upper()
2462
return hex_key_id
2463
1350
2464
1351
@staticmethod
2465
1352
def fingerprint(openpgp):
2466
1353
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
2467
1354
# New GnuTLS "datum" with the OpenPGP public key
2468
datum = gnutls.datum_t(
2469
ctypes.cast(ctypes.c_char_p(openpgp),
2470
ctypes.POINTER(ctypes.c_ubyte)),
2471
ctypes.c_uint(len(openpgp)))
1355
datum = (gnutls.library.types
1356
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1357
ctypes.POINTER
1358
(ctypes.c_ubyte)),
1359
ctypes.c_uint(len(openpgp))))
2472
1360
# New empty GnuTLS certificate
2473
crt = gnutls.openpgp_crt_t()
2474
gnutls.openpgp_crt_init(ctypes.byref(crt))
1361
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1362
(gnutls.library.functions
1363
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
2475
1364
# Import the OpenPGP public key into the certificate
2476
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2477
gnutls.OPENPGP_FMT_RAW)
1365
(gnutls.library.functions
1366
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1367
gnutls.library.constants
1368
.GNUTLS_OPENPGP_FMT_RAW))
2478
1369
# Verify the self signature in the key
2479
1370
crtverify = ctypes.c_uint()
2480
gnutls.openpgp_crt_verify_self(crt, 0,
2481
ctypes.byref(crtverify))
1371
(gnutls.library.functions
1372
.gnutls_openpgp_crt_verify_self(crt, 0,
1373
ctypes.byref(crtverify)))
2482
1374
if crtverify.value != 0:
2483
gnutls.openpgp_crt_deinit(crt)
2484
raise gnutls.CertificateSecurityError(code
2485
=crtverify.value)
1375
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1376
raise (gnutls.errors.CertificateSecurityError
1377
("Verify failed"))
2486
1378
# New buffer for the fingerprint
2487
1379
buf = ctypes.create_string_buffer(20)
2488
1380
buf_len = ctypes.c_size_t()
2489
1381
# Get the fingerprint from the certificate into the buffer
2490
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2491
ctypes.byref(buf_len))
1382
(gnutls.library.functions
1383
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1384
ctypes.byref(buf_len)))
2492
1385
# Deinit the certificate
2493
gnutls.openpgp_crt_deinit(crt)
1386
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
2494
1387
# Convert the buffer to a Python bytestring
2495
1388
fpr = ctypes.string_at(buf, buf_len.value)
2496
1389
# Convert the bytestring to hexadecimal notation
2497
hex_fpr = binascii.hexlify(fpr).upper()
1390
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
2498
1391
return hex_fpr
2499
1392
2500
1393
2501
1394
class MultiprocessingMixIn(object):
2502
1395
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2503
2504
1396
def sub_process_main(self, request, address):
2505
1397
try:
2506
1398
self.finish_request(request, address)
2507
except Exception:
1399
except:
2508
1400
self.handle_error(request, address)
2509
1401
self.close_request(request)
2510
1402
2511
1403
def process_request(self, request, address):
2512
1404
"""Start a new process to process the request."""
2513
proc = multiprocessing.Process(target=self.sub_process_main,
2514
args=(request, address))
2515
proc.start()
2516
return proc
2517
1405
multiprocessing.Process(target = self.sub_process_main,
1406
args = (request, address)).start()
2518
1407
2519
1408
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
2520
1409
""" adds a pipe to the MixIn """
2521
2522
1410
def process_request(self, request, client_address):
2523
1411
"""Overrides and wraps the original process_request().
2524
1412
2525
1413
This function creates a new pipe in self.pipe
2526
1414
"""
2527
1415
parent_pipe, self.child_pipe = multiprocessing.Pipe()
2528
1416
2529
proc = MultiprocessingMixIn.process_request(self, request,
2530
client_address)
1417
super(MultiprocessingMixInWithPipe,
1418
self).process_request(request, client_address)
2531
1419
self.child_pipe.close()
2532
self.add_pipe(parent_pipe, proc)
1420
self.add_pipe(parent_pipe)
2533
1421
2534
def add_pipe(self, parent_pipe, proc):
1422
def add_pipe(self, parent_pipe):
2535
1423
"""Dummy function; override as necessary"""
2536
raise NotImplementedError()
2537
1424
raise NotImplementedError
2538
1425
2539
1426
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
2540
1427
socketserver.TCPServer, object):
2541
1428
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
2542
1429
2543
1430
Attributes:
2544
1431
enabled: Boolean; whether this server is activated yet
2545
1432
interface: None or a network interface name (string)
2546
1433
use_ipv6: Boolean; to use IPv6 or not
2547
1434
"""
2548
2549
1435
def __init__(self, server_address, RequestHandlerClass,
2550
interface=None,
2551
use_ipv6=True,
2552
socketfd=None):
2553
"""If socketfd is set, use that file descriptor instead of
2554
creating a new one with socket.socket().
2555
"""
1436
interface=None, use_ipv6=True):
2556
1437
self.interface = interface
2557
1438
if use_ipv6:
2558
1439
self.address_family = socket.AF_INET6
2559
if socketfd is not None:
2560
# Save the file descriptor
2561
self.socketfd = socketfd
2562
# Save the original socket.socket() function
2563
self.socket_socket = socket.socket
2564
2565
# To implement --socket, we monkey patch socket.socket.
2566
#
2567
# (When socketserver.TCPServer is a new-style class, we
2568
# could make self.socket into a property instead of monkey
2569
# patching socket.socket.)
2570
#
2571
# Create a one-time-only replacement for socket.socket()
2572
@functools.wraps(socket.socket)
2573
def socket_wrapper(*args, **kwargs):
2574
# Restore original function so subsequent calls are
2575
# not affected.
2576
socket.socket = self.socket_socket
2577
del self.socket_socket
2578
# This time only, return a new socket object from the
2579
# saved file descriptor.
2580
return socket.fromfd(self.socketfd, *args, **kwargs)
2581
# Replace socket.socket() function with wrapper
2582
socket.socket = socket_wrapper
2583
# The socketserver.TCPServer.__init__ will call
2584
# socket.socket(), which might be our replacement,
2585
# socket_wrapper(), if socketfd was set.
2586
1440
socketserver.TCPServer.__init__(self, server_address,
2587
1441
RequestHandlerClass)
2588
2589
1442
def server_bind(self):
2590
1443
"""This overrides the normal server_bind() function
2591
1444
to bind to an interface if one was specified, and also NOT to
2592
1445
bind to an address or port if they were not specified."""
2593
global SO_BINDTODEVICE
2594
1446
if self.interface is not None:
2595
1447
if SO_BINDTODEVICE is None:
2596
# Fall back to a hard-coded value which seems to be
2597
# common enough.
2598
logger.warning("SO_BINDTODEVICE not found, trying 25")
2599
SO_BINDTODEVICE = 25
2600
try:
2601
self.socket.setsockopt(
2602
socket.SOL_SOCKET, SO_BINDTODEVICE,
2603
(self.interface + "\0").encode("utf-8"))
2604
except socket.error as error:
2605
if error.errno == errno.EPERM:
2606
logger.error("No permission to bind to"
2607
" interface %s", self.interface)
2608
elif error.errno == errno.ENOPROTOOPT:
2609
logger.error("SO_BINDTODEVICE not available;"
2610
" cannot bind to interface %s",
2611
self.interface)
2612
elif error.errno == errno.ENODEV:
2613
logger.error("Interface %s does not exist,"
2614
" cannot bind", self.interface)
2615
else:
2616
raise
1448
logger.error("SO_BINDTODEVICE does not exist;"
1449
" cannot bind to interface %s",
1450
self.interface)
1451
else:
1452
try:
1453
self.socket.setsockopt(socket.SOL_SOCKET,
1454
SO_BINDTODEVICE,
1455
str(self.interface
1456
+ '\0'))
1457
except socket.error as error:
1458
if error[0] == errno.EPERM:
1459
logger.error("No permission to"
1460
" bind to interface %s",
1461
self.interface)
1462
elif error[0] == errno.ENOPROTOOPT:
1463
logger.error("SO_BINDTODEVICE not available;"
1464
" cannot bind to interface %s",
1465
self.interface)
1466
else:
1467
raise
2617
1468
# Only bind(2) the socket if we really need to.
2618
1469
if self.server_address[0] or self.server_address[1]:
2619
1470
if not self.server_address[0]:
2620
1471
if self.address_family == socket.AF_INET6:
2621
any_address = "::" # in6addr_any
1472
any_address = "::" # in6addr_any
2622
1473
else:
2623
any_address = "0.0.0.0" # INADDR_ANY
1474
any_address = socket.INADDR_ANY
2624
1475
self.server_address = (any_address,
2625
1476
self.server_address[1])
2626
1477
elif not self.server_address[1]:
2627
self.server_address = (self.server_address[0], 0)
1478
self.server_address = (self.server_address[0],
1479
0)
2628
1480
# if self.interface:
2629
1481
# self.server_address = (self.server_address[0],
2630
1482
# 0, # port
2636
1488
2637
1489
class MandosServer(IPv6_TCPServer):
2638
1490
"""Mandos server.
2639
1491
2640
1492
Attributes:
2641
1493
clients: set of Client objects
2642
1494
gnutls_priority GnuTLS priority string
2643
1495
use_dbus: Boolean; to emit D-Bus signals or not
2644
2645
Assumes a GLib.MainLoop event loop.
1496
1497
Assumes a gobject.MainLoop event loop.
2646
1498
"""
2647
2648
1499
def __init__(self, server_address, RequestHandlerClass,
2649
interface=None,
2650
use_ipv6=True,
2651
clients=None,
2652
gnutls_priority=None,
2653
use_dbus=True,
2654
socketfd=None):
1500
interface=None, use_ipv6=True, clients=None,
1501
gnutls_priority=None, use_dbus=True):
2655
1502
self.enabled = False
2656
1503
self.clients = clients
2657
1504
if self.clients is None:
2658
self.clients = {}
1505
self.clients = set()
2659
1506
self.use_dbus = use_dbus
2660
1507
self.gnutls_priority = gnutls_priority
2661
1508
IPv6_TCPServer.__init__(self, server_address,
2662
1509
RequestHandlerClass,
2663
interface=interface,
2664
use_ipv6=use_ipv6,
2665
socketfd=socketfd)
2666
1510
interface = interface,
1511
use_ipv6 = use_ipv6)
2667
1512
def server_activate(self):
2668
1513
if self.enabled:
2669
1514
return socketserver.TCPServer.server_activate(self)
2670
2671
1515
def enable(self):
2672
1516
self.enabled = True
2673
2674
def add_pipe(self, parent_pipe, proc):
1517
def add_pipe(self, parent_pipe):
2675
1518
# Call "handle_ipc" for both data and EOF events
2676
GLib.io_add_watch(
2677
parent_pipe.fileno(),
2678
GLib.IO_IN | GLib.IO_HUP,
2679
functools.partial(self.handle_ipc,
2680
parent_pipe=parent_pipe,
2681
proc=proc))
2682
2683
def handle_ipc(self, source, condition,
2684
parent_pipe=None,
2685
proc=None,
1519
gobject.io_add_watch(parent_pipe.fileno(),
1520
gobject.IO_IN | gobject.IO_HUP,
1521
functools.partial(self.handle_ipc,
1522
parent_pipe = parent_pipe))
1523
1524
def handle_ipc(self, source, condition, parent_pipe=None,
2686
1525
client_object=None):
2687
# error, or the other end of multiprocessing.Pipe has closed
2688
if condition & (GLib.IO_ERR | GLib.IO_HUP):
2689
# Wait for other process to exit
2690
proc.join()
1526
condition_names = {
1527
gobject.IO_IN: "IN", # There is data to read.
1528
gobject.IO_OUT: "OUT", # Data can be written (without
1529
# blocking).
1530
gobject.IO_PRI: "PRI", # There is urgent data to read.
1531
gobject.IO_ERR: "ERR", # Error condition.
1532
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1533
# broken, usually for pipes and
1534
# sockets).
1535
}
1536
conditions_string = ' | '.join(name
1537
for cond, name in
1538
condition_names.iteritems()
1539
if cond & condition)
1540
# error or the other end of multiprocessing.Pipe has closed
1541
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
2691
1542
return False
2692
1543
2693
1544
# Read a request from the child
2694
1545
request = parent_pipe.recv()
2695
1546
command = request[0]
2696
1547
2697
1548
if command == 'init':
2698
key_id = request[1].decode("ascii")
2699
fpr = request[2].decode("ascii")
2700
address = request[3]
2701
2702
for c in self.clients.values():
2703
if key_id and c.key_id == key_id:
2704
client = c
2705
break
2706
if fpr and c.fingerprint == fpr:
1549
fpr = request[1]
1550
address = request[2]
1551
1552
for c in self.clients:
1553
if c.fingerprint == fpr:
2707
1554
client = c
2708
1555
break
2709
1556
else:
2710
logger.info("Client not found for key ID: %s, address"
2711
": %s", key_id or fpr, address)
1557
logger.info("Client not found for fingerprint: %s, ad"
1558
"dress: %s", fpr, address)
2712
1559
if self.use_dbus:
2713
1560
# Emit D-Bus signal
2714
mandos_dbus_service.ClientNotFound(key_id or fpr,
2715
address[0])
1561
mandos_dbus_service.ClientNotFound(fpr, address[0])
2716
1562
parent_pipe.send(False)
2717
1563
return False
2718
2719
GLib.io_add_watch(
2720
parent_pipe.fileno(),
2721
GLib.IO_IN | GLib.IO_HUP,
2722
functools.partial(self.handle_ipc,
2723
parent_pipe=parent_pipe,
2724
proc=proc,
2725
client_object=client))
1564
1565
gobject.io_add_watch(parent_pipe.fileno(),
1566
gobject.IO_IN | gobject.IO_HUP,
1567
functools.partial(self.handle_ipc,
1568
parent_pipe = parent_pipe,
1569
client_object = client))
2726
1570
parent_pipe.send(True)
2727
# remove the old hook in favor of the new above hook on
2728
# same fileno
1571
# remove the old hook in favor of the new above hook on same fileno
2729
1572
return False
2730
1573
if command == 'funcall':
2731
1574
funcname = request[1]
2732
1575
args = request[2]
2733
1576
kwargs = request[3]
2734
2735
parent_pipe.send(('data', getattr(client_object,
2736
funcname)(*args,
2737
**kwargs)))
1577
1578
parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))
2738
1579
2739
1580
if command == 'getattr':
2740
1581
attrname = request[1]
2741
if isinstance(client_object.__getattribute__(attrname),
2742
collections.Callable):
2743
parent_pipe.send(('function', ))
1582
if callable(client_object.__getattribute__(attrname)):
1583
parent_pipe.send(('function',))
2744
1584
else:
2745
parent_pipe.send((
2746
'data', client_object.__getattribute__(attrname)))
2747
1585
parent_pipe.send(('data', client_object.__getattribute__(attrname)))
1586
2748
1587
if command == 'setattr':
2749
1588
attrname = request[1]
2750
1589
value = request[2]
2753
1592
return True
2754
1593
2755
1594
2756
def rfc3339_duration_to_delta(duration):
2757
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2758
2759
>>> rfc3339_duration_to_delta("P7D")
2760
datetime.timedelta(7)
2761
>>> rfc3339_duration_to_delta("PT60S")
2762
datetime.timedelta(0, 60)
2763
>>> rfc3339_duration_to_delta("PT60M")
2764
datetime.timedelta(0, 3600)
2765
>>> rfc3339_duration_to_delta("PT24H")
2766
datetime.timedelta(1)
2767
>>> rfc3339_duration_to_delta("P1W")
2768
datetime.timedelta(7)
2769
>>> rfc3339_duration_to_delta("PT5M30S")
2770
datetime.timedelta(0, 330)
2771
>>> rfc3339_duration_to_delta("P1DT3M20S")
2772
datetime.timedelta(1, 200)
2773
"""
2774
2775
# Parsing an RFC 3339 duration with regular expressions is not
2776
# possible - there would have to be multiple places for the same
2777
# values, like seconds. The current code, while more esoteric, is
2778
# cleaner without depending on a parsing library. If Python had a
2779
# built-in library for parsing we would use it, but we'd like to
2780
# avoid excessive use of external libraries.
2781
2782
# New type for defining tokens, syntax, and semantics all-in-one
2783
Token = collections.namedtuple("Token", (
2784
"regexp", # To match token; if "value" is not None, must have
2785
# a "group" containing digits
2786
"value", # datetime.timedelta or None
2787
"followers")) # Tokens valid after this token
2788
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2789
# the "duration" ABNF definition in RFC 3339, Appendix A.
2790
token_end = Token(re.compile(r"$"), None, frozenset())
2791
token_second = Token(re.compile(r"(\d+)S"),
2792
datetime.timedelta(seconds=1),
2793
frozenset((token_end, )))
2794
token_minute = Token(re.compile(r"(\d+)M"),
2795
datetime.timedelta(minutes=1),
2796
frozenset((token_second, token_end)))
2797
token_hour = Token(re.compile(r"(\d+)H"),
2798
datetime.timedelta(hours=1),
2799
frozenset((token_minute, token_end)))
2800
token_time = Token(re.compile(r"T"),
2801
None,
2802
frozenset((token_hour, token_minute,
2803
token_second)))
2804
token_day = Token(re.compile(r"(\d+)D"),
2805
datetime.timedelta(days=1),
2806
frozenset((token_time, token_end)))
2807
token_month = Token(re.compile(r"(\d+)M"),
2808
datetime.timedelta(weeks=4),
2809
frozenset((token_day, token_end)))
2810
token_year = Token(re.compile(r"(\d+)Y"),
2811
datetime.timedelta(weeks=52),
2812
frozenset((token_month, token_end)))
2813
token_week = Token(re.compile(r"(\d+)W"),
2814
datetime.timedelta(weeks=1),
2815
frozenset((token_end, )))
2816
token_duration = Token(re.compile(r"P"), None,
2817
frozenset((token_year, token_month,
2818
token_day, token_time,
2819
token_week)))
2820
# Define starting values:
2821
# Value so far
2822
value = datetime.timedelta()
2823
found_token = None
2824
# Following valid tokens
2825
followers = frozenset((token_duration, ))
2826
# String left to parse
2827
s = duration
2828
# Loop until end token is found
2829
while found_token is not token_end:
2830
# Search for any currently valid tokens
2831
for token in followers:
2832
match = token.regexp.match(s)
2833
if match is not None:
2834
# Token found
2835
if token.value is not None:
2836
# Value found, parse digits
2837
factor = int(match.group(1), 10)
2838
# Add to value so far
2839
value += factor * token.value
2840
# Strip token from string
2841
s = token.regexp.sub("", s, 1)
2842
# Go to found token
2843
found_token = token
2844
# Set valid next tokens
2845
followers = found_token.followers
2846
break
2847
else:
2848
# No currently valid tokens were found
2849
raise ValueError("Invalid RFC 3339 duration: {!r}"
2850
.format(duration))
2851
# End token found
2852
return value
2853
2854
2855
1595
def string_to_delta(interval):
2856
1596
"""Parse a string and return a datetime.timedelta
2857
1597
2858
1598
>>> string_to_delta('7d')
2859
1599
datetime.timedelta(7)
2860
1600
>>> string_to_delta('60s')
2868
1608
>>> string_to_delta('5m 30s')
2869
1609
datetime.timedelta(0, 330)
2870
1610
"""
2871
2872
try:
2873
return rfc3339_duration_to_delta(interval)
2874
except ValueError:
2875
pass
2876
2877
1611
timevalue = datetime.timedelta(0)
2878
1612
for s in interval.split():
2879
1613
try:
2880
suffix = s[-1]
1614
suffix = unicode(s[-1])
2881
1615
value = int(s[:-1])
2882
1616
if suffix == "d":
2883
1617
delta = datetime.timedelta(value)
2890
1624
elif suffix == "w":
2891
1625
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
2892
1626
else:
2893
raise ValueError("Unknown suffix {!r}".format(suffix))
2894
except IndexError as e:
1627
raise ValueError("Unknown suffix %r" % suffix)
1628
except (ValueError, IndexError) as e:
2895
1629
raise ValueError(*(e.args))
2896
1630
timevalue += delta
2897
1631
return timevalue
2898
1632
2899
1633
2900
def daemon(nochdir=False, noclose=False):
1634
def if_nametoindex(interface):
1635
"""Call the C function if_nametoindex(), or equivalent
1636
1637
Note: This function cannot accept a unicode string."""
1638
global if_nametoindex
1639
try:
1640
if_nametoindex = (ctypes.cdll.LoadLibrary
1641
(ctypes.util.find_library("c"))
1642
.if_nametoindex)
1643
except (OSError, AttributeError):
1644
logger.warning("Doing if_nametoindex the hard way")
1645
def if_nametoindex(interface):
1646
"Get an interface index the hard way, i.e. using fcntl()"
1647
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1648
with contextlib.closing(socket.socket()) as s:
1649
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1650
struct.pack(str("16s16x"),
1651
interface))
1652
interface_index = struct.unpack(str("I"),
1653
ifreq[16:20])[0]
1654
return interface_index
1655
return if_nametoindex(interface)
1656
1657
1658
def daemon(nochdir = False, noclose = False):
2901
1659
"""See daemon(3). Standard BSD Unix function.
2902
1660
2903
1661
This should really exist as os.daemon, but it doesn't (yet)."""
2904
1662
if os.fork():
2905
1663
sys.exit()
2910
1668
sys.exit()
2911
1669
if not noclose:
2912
1670
# Close all standard open file descriptors
2913
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1671
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2914
1672
if not stat.S_ISCHR(os.fstat(null).st_mode):
2915
1673
raise OSError(errno.ENODEV,
2916
"{} not a character device"
2917
.format(os.devnull))
1674
"%s not a character device"
1675
% os.path.devnull)
2918
1676
os.dup2(null, sys.stdin.fileno())
2919
1677
os.dup2(null, sys.stdout.fileno())
2920
1678
os.dup2(null, sys.stderr.fileno())
2923
1681
2924
1682
2925
1683
def main():
2926
1684
2927
1685
##################################################################
2928
1686
# Parsing of options, both command line and config file
2929
1687
2930
1688
parser = argparse.ArgumentParser()
2931
1689
parser.add_argument("-v", "--version", action="version",
2932
version="%(prog)s {}".format(version),
1690
version = "%%(prog)s %s" % version,
2933
1691
help="show version number and exit")
2934
1692
parser.add_argument("-i", "--interface", metavar="IF",
2935
1693
help="Bind to interface IF")
2941
1699
help="Run self-test")
2942
1700
parser.add_argument("--debug", action="store_true",
2943
1701
help="Debug mode; run in foreground and log"
2944
" to terminal", default=None)
1702
" to terminal")
2945
1703
parser.add_argument("--debuglevel", metavar="LEVEL",
2946
1704
help="Debug level for stdout output")
2947
1705
parser.add_argument("--priority", help="GnuTLS"
2954
1712
" files")
2955
1713
parser.add_argument("--no-dbus", action="store_false",
2956
1714
dest="use_dbus", help="Do not provide D-Bus"
2957
" system bus interface", default=None)
1715
" system bus interface")
2958
1716
parser.add_argument("--no-ipv6", action="store_false",
2959
dest="use_ipv6", help="Do not use IPv6",
2960
default=None)
2961
parser.add_argument("--no-restore", action="store_false",
2962
dest="restore", help="Do not restore stored"
2963
" state", default=None)
2964
parser.add_argument("--socket", type=int,
2965
help="Specify a file descriptor to a network"
2966
" socket to use instead of creating one")
2967
parser.add_argument("--statedir", metavar="DIR",
2968
help="Directory to save/restore state in")
2969
parser.add_argument("--foreground", action="store_true",
2970
help="Run in foreground", default=None)
2971
parser.add_argument("--no-zeroconf", action="store_false",
2972
dest="zeroconf", help="Do not use Zeroconf",
2973
default=None)
2974
1717
dest="use_ipv6", help="Do not use IPv6")
2975
1718
options = parser.parse_args()
2976
1719
2977
1720
if options.check:
2978
1721
import doctest
2979
fail_count, test_count = doctest.testmod()
2980
sys.exit(os.EX_OK if fail_count == 0 else 1)
2981
1722
doctest.testmod()
1723
sys.exit()
1724
2982
1725
# Default values for config file for server-global settings
2983
if gnutls.has_rawpk:
2984
priority = ("SECURE128:!CTYPE-X.509:+CTYPE-RAWPK:!RSA"
2985
":!VERS-ALL:+VERS-TLS1.3:%PROFILE_ULTRA")
2986
else:
2987
priority = ("SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2988
":+SIGN-DSA-SHA256")
2989
server_defaults = {"interface": "",
2990
"address": "",
2991
"port": "",
2992
"debug": "False",
2993
"priority": priority,
2994
"servicename": "Mandos",
2995
"use_dbus": "True",
2996
"use_ipv6": "True",
2997
"debuglevel": "",
2998
"restore": "True",
2999
"socket": "",
3000
"statedir": "/var/lib/mandos",
3001
"foreground": "False",
3002
"zeroconf": "True",
3003
}
3004
del priority
3005
1726
server_defaults = { "interface": "",
1727
"address": "",
1728
"port": "",
1729
"debug": "False",
1730
"priority":
1731
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1732
"servicename": "Mandos",
1733
"use_dbus": "True",
1734
"use_ipv6": "True",
1735
"debuglevel": "",
1736
}
1737
3006
1738
# Parse config file for server-global settings
3007
1739
server_config = configparser.SafeConfigParser(server_defaults)
3008
1740
del server_defaults
3009
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1741
server_config.read(os.path.join(options.configdir,
1742
"mandos.conf"))
3010
1743
# Convert the SafeConfigParser object to a dict
3011
1744
server_settings = server_config.defaults()
3012
1745
# Use the appropriate methods on the non-string config options
3013
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3014
"foreground", "zeroconf"):
1746
for option in ("debug", "use_dbus", "use_ipv6"):
3015
1747
server_settings[option] = server_config.getboolean("DEFAULT",
3016
1748
option)
3017
1749
if server_settings["port"]:
3018
1750
server_settings["port"] = server_config.getint("DEFAULT",
3019
1751
"port")
3020
if server_settings["socket"]:
3021
server_settings["socket"] = server_config.getint("DEFAULT",
3022
"socket")
3023
# Later, stdin will, and stdout and stderr might, be dup'ed
3024
# over with an opened os.devnull. But we don't want this to
3025
# happen with a supplied network socket.
3026
if 0 <= server_settings["socket"] <= 2:
3027
server_settings["socket"] = os.dup(server_settings
3028
["socket"])
3029
1752
del server_config
3030
1753
3031
1754
# Override the settings from the config file with command line
3032
1755
# options, if set.
3033
1756
for option in ("interface", "address", "port", "debug",
3034
"priority", "servicename", "configdir", "use_dbus",
3035
"use_ipv6", "debuglevel", "restore", "statedir",
3036
"socket", "foreground", "zeroconf"):
1757
"priority", "servicename", "configdir",
1758
"use_dbus", "use_ipv6", "debuglevel"):
3037
1759
value = getattr(options, option)
3038
1760
if value is not None:
3039
1761
server_settings[option] = value
3040
1762
del options
3041
1763
# Force all strings to be unicode
3042
1764
for option in server_settings.keys():
3043
if isinstance(server_settings[option], bytes):
3044
server_settings[option] = (server_settings[option]
3045
.decode("utf-8"))
3046
# Force all boolean options to be boolean
3047
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3048
"foreground", "zeroconf"):
3049
server_settings[option] = bool(server_settings[option])
3050
# Debug implies foreground
3051
if server_settings["debug"]:
3052
server_settings["foreground"] = True
1765
if type(server_settings[option]) is str:
1766
server_settings[option] = unicode(server_settings[option])
3053
1767
# Now we have our good server settings in "server_settings"
3054
1768
3055
1769
##################################################################
3056
3057
if (not server_settings["zeroconf"]
3058
and not (server_settings["port"]
3059
or server_settings["socket"] != "")):
3060
parser.error("Needs port or socket to work without Zeroconf")
3061
1770
3062
1771
# For convenience
3063
1772
debug = server_settings["debug"]
3064
1773
debuglevel = server_settings["debuglevel"]
3065
1774
use_dbus = server_settings["use_dbus"]
3066
1775
use_ipv6 = server_settings["use_ipv6"]
3067
stored_state_path = os.path.join(server_settings["statedir"],
3068
stored_state_file)
3069
foreground = server_settings["foreground"]
3070
zeroconf = server_settings["zeroconf"]
3071
3072
if debug:
3073
initlogger(debug, logging.DEBUG)
3074
else:
3075
if not debuglevel:
3076
initlogger(debug)
3077
else:
3078
level = getattr(logging, debuglevel.upper())
3079
initlogger(debug, level)
3080
1776
3081
1777
if server_settings["servicename"] != "Mandos":
3082
syslogger.setFormatter(
3083
logging.Formatter('Mandos ({}) [%(process)d]:'
3084
' %(levelname)s: %(message)s'.format(
3085
server_settings["servicename"])))
3086
1778
syslogger.setFormatter(logging.Formatter
1779
('Mandos (%s) [%%(process)d]:'
1780
' %%(levelname)s: %%(message)s'
1781
% server_settings["servicename"]))
1782
3087
1783
# Parse config file with clients
3088
client_config = configparser.SafeConfigParser(Client
3089
.client_defaults)
1784
client_defaults = { "timeout": "5m",
1785
"extended_timeout": "15m",
1786
"interval": "2m",
1787
"checker": "fping -q -- %%(host)s",
1788
"host": "",
1789
"approval_delay": "0s",
1790
"approval_duration": "1s",
1791
}
1792
client_config = configparser.SafeConfigParser(client_defaults)
3090
1793
client_config.read(os.path.join(server_settings["configdir"],
3091
1794
"clients.conf"))
3092
1795
3093
1796
global mandos_dbus_service
3094
1797
mandos_dbus_service = None
3095
3096
socketfd = None
3097
if server_settings["socket"] != "":
3098
socketfd = server_settings["socket"]
3099
tcp_server = MandosServer(
3100
(server_settings["address"], server_settings["port"]),
3101
ClientHandler,
3102
interface=(server_settings["interface"] or None),
3103
use_ipv6=use_ipv6,
3104
gnutls_priority=server_settings["priority"],
3105
use_dbus=use_dbus,
3106
socketfd=socketfd)
3107
if not foreground:
3108
pidfilename = "/run/mandos.pid"
3109
if not os.path.isdir("/run/."):
3110
pidfilename = "/var/run/mandos.pid"
3111
pidfile = None
3112
try:
3113
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
3114
except IOError as e:
3115
logger.error("Could not open file %r", pidfilename,
3116
exc_info=e)
3117
3118
for name, group in (("_mandos", "_mandos"),
3119
("mandos", "mandos"),
3120
("nobody", "nogroup")):
3121
try:
3122
uid = pwd.getpwnam(name).pw_uid
3123
gid = pwd.getpwnam(group).pw_gid
3124
break
1798
1799
tcp_server = MandosServer((server_settings["address"],
1800
server_settings["port"]),
1801
ClientHandler,
1802
interface=(server_settings["interface"]
1803
or None),
1804
use_ipv6=use_ipv6,
1805
gnutls_priority=
1806
server_settings["priority"],
1807
use_dbus=use_dbus)
1808
if not debug:
1809
pidfilename = "/var/run/mandos.pid"
1810
try:
1811
pidfile = open(pidfilename, "w")
1812
except IOError:
1813
logger.error("Could not open file %r", pidfilename)
1814
1815
try:
1816
uid = pwd.getpwnam("_mandos").pw_uid
1817
gid = pwd.getpwnam("_mandos").pw_gid
1818
except KeyError:
1819
try:
1820
uid = pwd.getpwnam("mandos").pw_uid
1821
gid = pwd.getpwnam("mandos").pw_gid
3125
1822
except KeyError:
3126
continue
3127
else:
3128
uid = 65534
3129
gid = 65534
1823
try:
1824
uid = pwd.getpwnam("nobody").pw_uid
1825
gid = pwd.getpwnam("nobody").pw_gid
1826
except KeyError:
1827
uid = 65534
1828
gid = 65534
3130
1829
try:
3131
1830
os.setgid(gid)
3132
1831
os.setuid(uid)
3133
if debug:
3134
logger.debug("Did setuid/setgid to {}:{}".format(uid,
3135
gid))
3136
1832
except OSError as error:
3137
logger.warning("Failed to setuid/setgid to {}:{}: {}"
3138
.format(uid, gid, os.strerror(error.errno)))
3139
if error.errno != errno.EPERM:
3140
raise
1833
if error[0] != errno.EPERM:
1834
raise error
1835
1836
if not debug and not debuglevel:
1837
syslogger.setLevel(logging.WARNING)
1838
console.setLevel(logging.WARNING)
1839
if debuglevel:
1840
level = getattr(logging, debuglevel.upper())
1841
syslogger.setLevel(level)
1842
console.setLevel(level)
3141
1843
3142
1844
if debug:
3143
1845
# Enable all possible GnuTLS debugging
3144
1846
3145
1847
# "Use a log level over 10 to enable all debugging options."
3146
1848
# - GnuTLS manual
3147
gnutls.global_set_log_level(11)
3148
3149
@gnutls.log_func
1849
gnutls.library.functions.gnutls_global_set_log_level(11)
1850
1851
@gnutls.library.types.gnutls_log_func
3150
1852
def debug_gnutls(level, string):
3151
1853
logger.debug("GnuTLS: %s", string[:-1])
3152
3153
gnutls.global_set_log_function(debug_gnutls)
3154
1854
1855
(gnutls.library.functions
1856
.gnutls_global_set_log_function(debug_gnutls))
1857
3155
1858
# Redirect stdin so all checkers get /dev/null
3156
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1859
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
3157
1860
os.dup2(null, sys.stdin.fileno())
3158
1861
if null > 2:
3159
1862
os.close(null)
3160
1863
else:
1864
# No console logging
1865
logger.removeHandler(console)
1866
3161
1867
# Need to fork before connecting to D-Bus
3162
if not foreground:
1868
if not debug:
3163
1869
# Close all input and output, do double fork, etc.
3164
1870
daemon()
3165
3166
# multiprocessing will use threads, so before we use GLib we need
3167
# to inform GLib that threads will be used.
3168
GLib.threads_init()
3169
1871
3170
1872
global main_loop
3171
1873
# From the Avahi example code
3172
DBusGMainLoop(set_as_default=True)
3173
main_loop = GLib.MainLoop()
1874
DBusGMainLoop(set_as_default=True )
1875
main_loop = gobject.MainLoop()
3174
1876
bus = dbus.SystemBus()
3175
1877
# End of Avahi example code
3176
1878
if use_dbus:
3177
1879
try:
3178
bus_name = dbus.service.BusName("se.recompile.Mandos",
3179
bus,
3180
do_not_queue=True)
3181
old_bus_name = dbus.service.BusName(
3182
"se.bsnet.fukt.Mandos", bus,
3183
do_not_queue=True)
3184
except dbus.exceptions.DBusException as e:
3185
logger.error("Disabling D-Bus:", exc_info=e)
1880
bus_name = dbus.service.BusName("se.bsnet.fukt.Mandos",
1881
bus, do_not_queue=True)
1882
except dbus.exceptions.NameExistsException as e:
1883
logger.error(unicode(e) + ", disabling D-Bus")
3186
1884
use_dbus = False
3187
1885
server_settings["use_dbus"] = False
3188
1886
tcp_server.use_dbus = False
3189
if zeroconf:
3190
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3191
service = AvahiServiceToSyslog(
3192
name=server_settings["servicename"],
3193
servicetype="_mandos._tcp",
3194
protocol=protocol,
3195
bus=bus)
3196
if server_settings["interface"]:
3197
service.interface = if_nametoindex(
3198
server_settings["interface"].encode("utf-8"))
3199
1887
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1888
service = AvahiService(name = server_settings["servicename"],
1889
servicetype = "_mandos._tcp",
1890
protocol = protocol, bus = bus)
1891
if server_settings["interface"]:
1892
service.interface = (if_nametoindex
1893
(str(server_settings["interface"])))
1894
3200
1895
global multiprocessing_manager
3201
1896
multiprocessing_manager = multiprocessing.Manager()
3202
1897
3203
1898
client_class = Client
3204
1899
if use_dbus:
3205
client_class = functools.partial(ClientDBus, bus=bus)
3206
3207
client_settings = Client.config_parser(client_config)
3208
old_client_settings = {}
3209
clients_data = {}
3210
3211
# This is used to redirect stdout and stderr for checker processes
3212
global wnull
3213
wnull = open(os.devnull, "w") # A writable /dev/null
3214
# Only used if server is running in foreground but not in debug
3215
# mode
3216
if debug or not foreground:
3217
wnull.close()
3218
3219
# Get client data and settings from last running state.
3220
if server_settings["restore"]:
3221
try:
3222
with open(stored_state_path, "rb") as stored_state:
3223
if sys.version_info.major == 2:
3224
clients_data, old_client_settings = pickle.load(
3225
stored_state)
3226
else:
3227
bytes_clients_data, bytes_old_client_settings = (
3228
pickle.load(stored_state, encoding="bytes"))
3229
# Fix bytes to strings
3230
# clients_data
3231
# .keys()
3232
clients_data = {(key.decode("utf-8")
3233
if isinstance(key, bytes)
3234
else key): value
3235
for key, value in
3236
bytes_clients_data.items()}
3237
del bytes_clients_data
3238
for key in clients_data:
3239
value = {(k.decode("utf-8")
3240
if isinstance(k, bytes) else k): v
3241
for k, v in
3242
clients_data[key].items()}
3243
clients_data[key] = value
3244
# .client_structure
3245
value["client_structure"] = [
3246
(s.decode("utf-8")
3247
if isinstance(s, bytes)
3248
else s) for s in
3249
value["client_structure"]]
3250
# .name & .host
3251
for k in ("name", "host"):
3252
if isinstance(value[k], bytes):
3253
value[k] = value[k].decode("utf-8")
3254
if not value.has_key("key_id"):
3255
value["key_id"] = ""
3256
elif not value.has_key("fingerprint"):
3257
value["fingerprint"] = ""
3258
# old_client_settings
3259
# .keys()
3260
old_client_settings = {
3261
(key.decode("utf-8")
3262
if isinstance(key, bytes)
3263
else key): value
3264
for key, value in
3265
bytes_old_client_settings.items()}
3266
del bytes_old_client_settings
3267
# .host
3268
for value in old_client_settings.values():
3269
if isinstance(value["host"], bytes):
3270
value["host"] = (value["host"]
3271
.decode("utf-8"))
3272
os.remove(stored_state_path)
3273
except IOError as e:
3274
if e.errno == errno.ENOENT:
3275
logger.warning("Could not load persistent state:"
3276
" {}".format(os.strerror(e.errno)))
3277
else:
3278
logger.critical("Could not load persistent state:",
3279
exc_info=e)
3280
raise
3281
except EOFError as e:
3282
logger.warning("Could not load persistent state: "
3283
"EOFError:",
3284
exc_info=e)
3285
3286
with PGPEngine() as pgp:
3287
for client_name, client in clients_data.items():
3288
# Skip removed clients
3289
if client_name not in client_settings:
3290
continue
3291
3292
# Decide which value to use after restoring saved state.
3293
# We have three different values: Old config file,
3294
# new config file, and saved state.
3295
# New config value takes precedence if it differs from old
3296
# config value, otherwise use saved state.
3297
for name, value in client_settings[client_name].items():
3298
try:
3299
# For each value in new config, check if it
3300
# differs from the old config value (Except for
3301
# the "secret" attribute)
3302
if (name != "secret"
3303
and (value !=
3304
old_client_settings[client_name][name])):
3305
client[name] = value
3306
except KeyError:
3307
pass
3308
3309
# Clients who has passed its expire date can still be
3310
# enabled if its last checker was successful. A Client
3311
# whose checker succeeded before we stored its state is
3312
# assumed to have successfully run all checkers during
3313
# downtime.
3314
if client["enabled"]:
3315
if datetime.datetime.utcnow() >= client["expires"]:
3316
if not client["last_checked_ok"]:
3317
logger.warning(
3318
"disabling client {} - Client never "
3319
"performed a successful checker".format(
3320
client_name))
3321
client["enabled"] = False
3322
elif client["last_checker_status"] != 0:
3323
logger.warning(
3324
"disabling client {} - Client last"
3325
" checker failed with error code"
3326
" {}".format(
3327
client_name,
3328
client["last_checker_status"]))
3329
client["enabled"] = False
3330
else:
3331
client["expires"] = (
3332
datetime.datetime.utcnow()
3333
+ client["timeout"])
3334
logger.debug("Last checker succeeded,"
3335
" keeping {} enabled".format(
3336
client_name))
1900
client_class = functools.partial(ClientDBus, bus = bus)
1901
def client_config_items(config, section):
1902
special_settings = {
1903
"approved_by_default":
1904
lambda: config.getboolean(section,
1905
"approved_by_default"),
1906
}
1907
for name, value in config.items(section):
3337
1908
try:
3338
client["secret"] = pgp.decrypt(
3339
client["encrypted_secret"],
3340
client_settings[client_name]["secret"])
3341
except PGPError:
3342
# If decryption fails, we use secret from new settings
3343
logger.debug("Failed to decrypt {} old secret".format(
3344
client_name))
3345
client["secret"] = (client_settings[client_name]
3346
["secret"])
3347
3348
# Add/remove clients based on new changes made to config
3349
for client_name in (set(old_client_settings)
3350
- set(client_settings)):
3351
del clients_data[client_name]
3352
for client_name in (set(client_settings)
3353
- set(old_client_settings)):
3354
clients_data[client_name] = client_settings[client_name]
3355
3356
# Create all client objects
3357
for client_name, client in clients_data.items():
3358
tcp_server.clients[client_name] = client_class(
3359
name=client_name,
3360
settings=client,
3361
server_settings=server_settings)
3362
1909
yield (name, special_settings[name]())
1910
except KeyError:
1911
yield (name, value)
1912
1913
tcp_server.clients.update(set(
1914
client_class(name = section,
1915
config= dict(client_config_items(
1916
client_config, section)))
1917
for section in client_config.sections()))
3363
1918
if not tcp_server.clients:
3364
1919
logger.warning("No clients defined")
3365
3366
if not foreground:
3367
if pidfile is not None:
3368
pid = os.getpid()
3369
try:
3370
with pidfile:
3371
print(pid, file=pidfile)
3372
except IOError:
3373
logger.error("Could not write to file %r with PID %d",
3374
pidfilename, pid)
3375
del pidfile
1920
1921
if not debug:
1922
try:
1923
with pidfile:
1924
pid = os.getpid()
1925
pidfile.write(str(pid) + "\n".encode("utf-8"))
1926
del pidfile
1927
except IOError:
1928
logger.error("Could not write to file %r with PID %d",
1929
pidfilename, pid)
1930
except NameError:
1931
# "pidfile" was never created
1932
pass
3376
1933
del pidfilename
3377
3378
for termsig in (signal.SIGHUP, signal.SIGTERM):
3379
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3380
lambda: main_loop.quit() and False)
3381
1934
1935
signal.signal(signal.SIGINT, signal.SIG_IGN)
1936
1937
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1938
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1939
3382
1940
if use_dbus:
3383
3384
@alternate_dbus_interfaces(
3385
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3386
class MandosDBusService(DBusObjectWithObjectManager):
1941
class MandosDBusService(dbus.service.Object):
3387
1942
"""A D-Bus proxy object"""
3388
3389
1943
def __init__(self):
3390
1944
dbus.service.Object.__init__(self, bus, "/")
3391
3392
_interface = "se.recompile.Mandos"
3393
1945
_interface = "se.bsnet.fukt.Mandos"
1946
3394
1947
@dbus.service.signal(_interface, signature="o")
3395
1948
def ClientAdded(self, objpath):
3396
1949
"D-Bus signal"
3397
1950
pass
3398
1951
3399
1952
@dbus.service.signal(_interface, signature="ss")
3400
def ClientNotFound(self, key_id, address):
1953
def ClientNotFound(self, fingerprint, address):
3401
1954
"D-Bus signal"
3402
1955
pass
3403
3404
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3405
"true"})
1956
3406
1957
@dbus.service.signal(_interface, signature="os")
3407
1958
def ClientRemoved(self, objpath, name):
3408
1959
"D-Bus signal"
3409
1960
pass
3410
3411
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3412
"true"})
1961
3413
1962
@dbus.service.method(_interface, out_signature="ao")
3414
1963
def GetAllClients(self):
3415
1964
"D-Bus method"
3416
return dbus.Array(c.dbus_object_path for c in
3417
tcp_server.clients.values())
3418
3419
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3420
"true"})
1965
return dbus.Array(c.dbus_object_path
1966
for c in tcp_server.clients)
1967
3421
1968
@dbus.service.method(_interface,
3422
1969
out_signature="a{oa{sv}}")
3423
1970
def GetAllClientsWithProperties(self):
3424
1971
"D-Bus method"
3425
1972
return dbus.Dictionary(
3426
{c.dbus_object_path: c.GetAll(
3427
"se.recompile.Mandos.Client")
3428
for c in tcp_server.clients.values()},
1973
((c.dbus_object_path, c.GetAll(""))
1974
for c in tcp_server.clients),
3429
1975
signature="oa{sv}")
3430
1976
3431
1977
@dbus.service.method(_interface, in_signature="o")
3432
1978
def RemoveClient(self, object_path):
3433
1979
"D-Bus method"
3434
for c in tcp_server.clients.values():
1980
for c in tcp_server.clients:
3435
1981
if c.dbus_object_path == object_path:
3436
del tcp_server.clients[c.name]
1982
tcp_server.clients.remove(c)
3437
1983
c.remove_from_connection()
3438
# Don't signal the disabling
1984
# Don't signal anything except ClientRemoved
3439
1985
c.disable(quiet=True)
3440
# Emit D-Bus signal for removal
3441
self.client_removed_signal(c)
1986
# Emit D-Bus signal
1987
self.ClientRemoved(object_path, c.name)
3442
1988
return
3443
1989
raise KeyError(object_path)
3444
1990
3445
1991
del _interface
3446
3447
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3448
out_signature="a{oa{sa{sv}}}")
3449
def GetManagedObjects(self):
3450
"""D-Bus method"""
3451
return dbus.Dictionary(
3452
{client.dbus_object_path:
3453
dbus.Dictionary(
3454
{interface: client.GetAll(interface)
3455
for interface in
3456
client._get_all_interface_names()})
3457
for client in tcp_server.clients.values()})
3458
3459
def client_added_signal(self, client):
3460
"""Send the new standard signal and the old signal"""
3461
if use_dbus:
3462
# New standard signal
3463
self.InterfacesAdded(
3464
client.dbus_object_path,
3465
dbus.Dictionary(
3466
{interface: client.GetAll(interface)
3467
for interface in
3468
client._get_all_interface_names()}))
3469
# Old signal
3470
self.ClientAdded(client.dbus_object_path)
3471
3472
def client_removed_signal(self, client):
3473
"""Send the new standard signal and the old signal"""
3474
if use_dbus:
3475
# New standard signal
3476
self.InterfacesRemoved(
3477
client.dbus_object_path,
3478
client._get_all_interface_names())
3479
# Old signal
3480
self.ClientRemoved(client.dbus_object_path,
3481
client.name)
3482
1992
3483
1993
mandos_dbus_service = MandosDBusService()
3484
3485
# Save modules to variables to exempt the modules from being
3486
# unloaded before the function registered with atexit() is run.
3487
mp = multiprocessing
3488
wn = wnull
3489
1994
3490
1995
def cleanup():
3491
1996
"Cleanup function; run on exit"
3492
if zeroconf:
3493
service.cleanup()
3494
3495
mp.active_children()
3496
wn.close()
3497
if not (tcp_server.clients or client_settings):
3498
return
3499
3500
# Store client before exiting. Secrets are encrypted with key
3501
# based on what config file has. If config file is
3502
# removed/edited, old secret will thus be unrecovable.
3503
clients = {}
3504
with PGPEngine() as pgp:
3505
for client in tcp_server.clients.values():
3506
key = client_settings[client.name]["secret"]
3507
client.encrypted_secret = pgp.encrypt(client.secret,
3508
key)
3509
client_dict = {}
3510
3511
# A list of attributes that can not be pickled
3512
# + secret.
3513
exclude = {"bus", "changedstate", "secret",
3514
"checker", "server_settings"}
3515
for name, typ in inspect.getmembers(dbus.service
3516
.Object):
3517
exclude.add(name)
3518
3519
client_dict["encrypted_secret"] = (client
3520
.encrypted_secret)
3521
for attr in client.client_structure:
3522
if attr not in exclude:
3523
client_dict[attr] = getattr(client, attr)
3524
3525
clients[client.name] = client_dict
3526
del client_settings[client.name]["secret"]
3527
3528
try:
3529
with tempfile.NamedTemporaryFile(
3530
mode='wb',
3531
suffix=".pickle",
3532
prefix='clients-',
3533
dir=os.path.dirname(stored_state_path),
3534
delete=False) as stored_state:
3535
pickle.dump((clients, client_settings), stored_state,
3536
protocol=2)
3537
tempname = stored_state.name
3538
os.rename(tempname, stored_state_path)
3539
except (IOError, OSError) as e:
3540
if not debug:
3541
try:
3542
os.remove(tempname)
3543
except NameError:
3544
pass
3545
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
3546
logger.warning("Could not save persistent state: {}"
3547
.format(os.strerror(e.errno)))
3548
else:
3549
logger.warning("Could not save persistent state:",
3550
exc_info=e)
3551
raise
3552
3553
# Delete all clients, and settings from config
1997
service.cleanup()
1998
3554
1999
while tcp_server.clients:
3555
name, client = tcp_server.clients.popitem()
2000
client = tcp_server.clients.pop()
3556
2001
if use_dbus:
3557
2002
client.remove_from_connection()
3558
# Don't signal the disabling
2003
client.disable_hook = None
2004
# Don't signal anything except ClientRemoved
3559
2005
client.disable(quiet=True)
3560
# Emit D-Bus signal for removal
3561
2006
if use_dbus:
3562
mandos_dbus_service.client_removed_signal(client)
3563
client_settings.clear()
3564
2007
# Emit D-Bus signal
2008
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
2009
client.name)
2010
3565
2011
atexit.register(cleanup)
3566
3567
for client in tcp_server.clients.values():
2012
2013
for client in tcp_server.clients:
3568
2014
if use_dbus:
3569
# Emit D-Bus signal for adding
3570
mandos_dbus_service.client_added_signal(client)
3571
# Need to initiate checking of clients
3572
if client.enabled:
3573
client.init_checker()
3574
2015
# Emit D-Bus signal
2016
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2017
client.enable()
2018
3575
2019
tcp_server.enable()
3576
2020
tcp_server.server_activate()
3577
2021
3578
2022
# Find out what port we got
3579
if zeroconf:
3580
service.port = tcp_server.socket.getsockname()[1]
2023
service.port = tcp_server.socket.getsockname()[1]
3581
2024
if use_ipv6:
3582
2025
logger.info("Now listening on address %r, port %d,"
3583
" flowinfo %d, scope_id %d",
3584
*tcp_server.socket.getsockname())
2026
" flowinfo %d, scope_id %d"
2027
% tcp_server.socket.getsockname())
3585
2028
else: # IPv4
3586
logger.info("Now listening on address %r, port %d",
3587
*tcp_server.socket.getsockname())
3588
3589
# service.interface = tcp_server.socket.getsockname()[3]
3590
2029
logger.info("Now listening on address %r, port %d"
2030
% tcp_server.socket.getsockname())
2031
2032
#service.interface = tcp_server.socket.getsockname()[3]
2033
3591
2034
try:
3592
if zeroconf:
3593
# From the Avahi example code
3594
try:
3595
service.activate()
3596
except dbus.exceptions.DBusException as error:
3597
logger.critical("D-Bus Exception", exc_info=error)
3598
cleanup()
3599
sys.exit(1)
3600
# End of Avahi example code
3601
3602
GLib.io_add_watch(tcp_server.fileno(), GLib.IO_IN,
3603
lambda *args, **kwargs:
3604
(tcp_server.handle_request
3605
(*args[2:], **kwargs) or True))
3606
2035
# From the Avahi example code
2036
try:
2037
service.activate()
2038
except dbus.exceptions.DBusException as error:
2039
logger.critical("DBusException: %s", error)
2040
cleanup()
2041
sys.exit(1)
2042
# End of Avahi example code
2043
2044
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2045
lambda *args, **kwargs:
2046
(tcp_server.handle_request
2047
(*args[2:], **kwargs) or True))
2048
3607
2049
logger.debug("Starting main loop")
3608
2050
main_loop.run()
3609
2051
except AvahiError as error:
3610
logger.critical("Avahi Error", exc_info=error)
2052
logger.critical("AvahiError: %s", error)
3611
2053
cleanup()
3612
2054
sys.exit(1)
3613
2055
except KeyboardInterrupt:
3618
2060
# Must run before the D-Bus bus name gets deregistered
3619
2061
cleanup()
3620
2062
3621
3622
2063
if __name__ == '__main__':
3623
2064
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0