To get this branch, use:
bzr branch
http://bzr.recompile.se/loggerhead/mandos/release
« back to all changes in this revision
Viewing changes to mandos
- browse files at revision 237.7.651
- compare with another revision
- download diff
- download tarball
- view history from revision 237.7.651
- Committer: Teddy Hogeborn
- Date: 2019-04-10 20:33:13 UTC
- mto: This revision was merged to the branch mainline in revision 384.
- Revision ID: teddy@recompile.se-20190410203313-d3ufer20hfws7i3h
Improve language in intro(8mandos) manual page
* intro.xml (INTRODUCTION): Replace "it" with "the data" to fix bad
reference, and clarify that it is the
client which continues booting.
* intro.xml (INTRODUCTION): Replace "it" with "the data" to fix bad
reference, and clarify that it is the
client which continues booting.
- files added:
- DBUS-API
- debian/source
- debian/upstream
- network-hooks.d
- plugin-helpers
- files removed:
- initramfs-tools-hook-conf
- files modified:
- .bzrignore
added
removed
mandos
1
1
#!/usr/bin/python
2
2
# -*- mode: python; coding: utf-8 -*-
3
#
3
#
4
4
# Mandos server - give out binary blobs to connecting clients.
5
#
5
#
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
# methods "add" and "remove" in the "AvahiService" class, the
10
# "server_state_changed" and "entry_group_state_changed" functions,
11
# and some lines in "main".
12
#
9
# methods "add", "remove", "server_state_changed",
10
# "entry_group_state_changed", "cleanup", and "activate" in the
11
# "AvahiService" class, and some lines in "main".
12
#
13
13
# Everything else is
14
# Copyright © 2008,2009 Teddy Hogeborn
15
# Copyright © 2008,2009 Björn Påhlsson
16
#
17
# This program is free software: you can redistribute it and/or modify
18
# it under the terms of the GNU General Public License as published by
14
# Copyright © 2008-2019 Teddy Hogeborn
15
# Copyright © 2008-2019 Björn Påhlsson
16
#
17
# This file is part of Mandos.
18
#
19
# Mandos is free software: you can redistribute it and/or modify it
20
# under the terms of the GNU General Public License as published by
19
21
# the Free Software Foundation, either version 3 of the License, or
20
22
# (at your option) any later version.
21
23
#
22
# This program is distributed in the hope that it will be useful,
23
# but WITHOUT ANY WARRANTY; without even the implied warranty of
24
# Mandos is distributed in the hope that it will be useful, but
25
# WITHOUT ANY WARRANTY; without even the implied warranty of
24
26
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
25
27
# GNU General Public License for more details.
26
#
28
#
27
29
# You should have received a copy of the GNU General Public License
28
# along with this program. If not, see
29
# <http://www.gnu.org/licenses/>.
30
#
31
# Contact the authors at <mandos@fukt.bsnet.se>.
32
#
33
34
from __future__ import division, with_statement, absolute_import
35
36
import SocketServer
30
# along with Mandos. If not, see <http://www.gnu.org/licenses/>.
31
#
32
# Contact the authors at <mandos@recompile.se>.
33
#
34
35
from __future__ import (division, absolute_import, print_function,
36
unicode_literals)
37
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
47
import socket
38
import optparse
48
import argparse
39
49
import datetime
40
50
import errno
41
import gnutls.crypto
42
import gnutls.connection
43
import gnutls.errors
44
import gnutls.library.functions
45
import gnutls.library.constants
46
import gnutls.library.types
47
import ConfigParser
51
try:
52
import ConfigParser as configparser
53
except ImportError:
54
import configparser
48
55
import sys
49
56
import re
50
57
import os
51
58
import signal
52
from sets import Set
53
59
import subprocess
54
60
import atexit
55
61
import stat
56
62
import logging
57
63
import logging.handlers
58
64
import pwd
59
from contextlib import closing
65
import contextlib
66
import struct
67
import fcntl
68
import functools
69
try:
70
import cPickle as pickle
71
except ImportError:
72
import pickle
73
import multiprocessing
74
import types
75
import binascii
76
import tempfile
77
import itertools
78
import collections
79
import codecs
60
80
61
81
import dbus
62
82
import dbus.service
63
import gobject
64
import avahi
83
from gi.repository import GLib
65
84
from dbus.mainloop.glib import DBusGMainLoop
66
85
import ctypes
67
86
import ctypes.util
68
69
version = "1.0.5"
70
71
logger = logging.Logger('mandos')
72
syslogger = (logging.handlers.SysLogHandler
73
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
74
address = "/dev/log"))
75
syslogger.setFormatter(logging.Formatter
76
('Mandos: %(levelname)s: %(message)s'))
77
logger.addHandler(syslogger)
78
79
console = logging.StreamHandler()
80
console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
81
' %(message)s'))
82
logger.addHandler(console)
87
import xml.dom.minidom
88
import inspect
89
90
# Try to find the value of SO_BINDTODEVICE:
91
try:
92
# This is where SO_BINDTODEVICE is in Python 3.3 (or 3.4?) and
93
# newer, and it is also the most natural place for it:
94
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
95
except AttributeError:
96
try:
97
# This is where SO_BINDTODEVICE was up to and including Python
98
# 2.6, and also 3.2:
99
from IN import SO_BINDTODEVICE
100
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 = "1.8.4"
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
IF_UNSPEC = -1 # avahi-common/address.h
281
PROTO_UNSPEC = -1 # avahi-common/address.h
282
PROTO_INET = 0 # avahi-common/address.h
283
PROTO_INET6 = 1 # avahi-common/address.h
284
DBUS_NAME = "org.freedesktop.Avahi"
285
DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"
286
DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"
287
DBUS_PATH_SERVER = "/"
288
289
@staticmethod
290
def string_array_to_txt_array(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
83
302
84
303
class AvahiError(Exception):
85
304
def __init__(self, value, *args, **kwargs):
86
305
self.value = value
87
super(AvahiError, self).__init__(value, *args, **kwargs)
88
def __unicode__(self):
89
return unicode(repr(self.value))
306
return super(AvahiError, self).__init__(value, *args,
307
**kwargs)
308
90
309
91
310
class AvahiServiceError(AvahiError):
92
311
pass
93
312
313
94
314
class AvahiGroupError(AvahiError):
95
315
pass
96
316
97
317
98
318
class AvahiService(object):
99
319
"""An Avahi (Zeroconf) service.
320
100
321
Attributes:
101
322
interface: integer; avahi.IF_UNSPEC or an interface index.
102
323
Used to optionally bind to the specified interface.
103
324
name: string; Example: 'Mandos'
104
325
type: string; Example: '_mandos._tcp'.
105
See <http://www.dns-sd.org/ServiceTypes.html>
326
See <https://www.iana.org/assignments/service-names-port-numbers>
106
327
port: integer; what port to announce
107
328
TXT: list of strings; TXT record for the service
108
329
domain: string; Domain to publish on, default to .local if empty.
110
331
max_renames: integer; maximum number of renames
111
332
rename_count: integer; counter so we only rename after collisions
112
333
a sensible number of times
334
group: D-Bus Entry Group
335
server: D-Bus Server
336
bus: dbus.SystemBus()
113
337
"""
114
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
115
servicetype = None, port = None, TXT = None,
116
domain = "", host = "", max_renames = 32768):
338
339
def __init__(self,
340
interface=avahi.IF_UNSPEC,
341
name=None,
342
servicetype=None,
343
port=None,
344
TXT=None,
345
domain="",
346
host="",
347
max_renames=32768,
348
protocol=avahi.PROTO_UNSPEC,
349
bus=None):
117
350
self.interface = interface
118
351
self.name = name
119
352
self.type = servicetype
123
356
self.host = host
124
357
self.rename_count = 0
125
358
self.max_renames = max_renames
126
def rename(self):
359
self.protocol = protocol
360
self.group = None # our entry group
361
self.server = None
362
self.bus = bus
363
self.entry_group_state_changed_match = None
364
365
def rename(self, remove=True):
127
366
"""Derived from the Avahi example code"""
128
367
if self.rename_count >= self.max_renames:
129
logger.critical(u"No suitable Zeroconf service name found"
130
u" after %i retries, exiting.",
368
logger.critical("No suitable Zeroconf service name found"
369
" after %i retries, exiting.",
131
370
self.rename_count)
132
raise AvahiServiceError(u"Too many renames")
133
self.name = server.GetAlternativeServiceName(self.name)
134
logger.info(u"Changing Zeroconf service name to %r ...",
135
str(self.name))
136
syslogger.setFormatter(logging.Formatter
137
('Mandos (%s): %%(levelname)s:'
138
' %%(message)s' % self.name))
139
self.remove()
140
self.add()
371
raise AvahiServiceError("Too many renames")
372
self.name = str(
373
self.server.GetAlternativeServiceName(self.name))
141
374
self.rename_count += 1
375
logger.info("Changing Zeroconf service name to %r ...",
376
self.name)
377
if remove:
378
self.remove()
379
try:
380
self.add()
381
except dbus.exceptions.DBusException as error:
382
if (error.get_dbus_name()
383
== "org.freedesktop.Avahi.CollisionError"):
384
logger.info("Local Zeroconf service name collision.")
385
return self.rename(remove=False)
386
else:
387
logger.critical("D-Bus Exception", exc_info=error)
388
self.cleanup()
389
os._exit(1)
390
142
391
def remove(self):
143
392
"""Derived from the Avahi example code"""
144
if group is not None:
145
group.Reset()
393
if self.entry_group_state_changed_match is not None:
394
self.entry_group_state_changed_match.remove()
395
self.entry_group_state_changed_match = None
396
if self.group is not None:
397
self.group.Reset()
398
146
399
def add(self):
147
400
"""Derived from the Avahi example code"""
148
global group
149
if group is None:
150
group = dbus.Interface(bus.get_object
151
(avahi.DBUS_NAME,
152
server.EntryGroupNew()),
153
avahi.DBUS_INTERFACE_ENTRY_GROUP)
154
group.connect_to_signal('StateChanged',
155
entry_group_state_changed)
156
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
157
service.name, service.type)
158
group.AddService(
159
self.interface, # interface
160
avahi.PROTO_INET6, # protocol
161
dbus.UInt32(0), # flags
162
self.name, self.type,
163
self.domain, self.host,
164
dbus.UInt16(self.port),
165
avahi.string_array_to_txt_array(self.TXT))
166
group.Commit()
167
168
# From the Avahi example code:
169
group = None # our entry group
170
# End of Avahi example code
171
172
173
def _datetime_to_dbus(dt, variant_level=0):
174
"""Convert a UTC datetime.datetime() to a D-Bus type."""
175
return dbus.String(dt.isoformat(), variant_level=variant_level)
176
177
178
class Client(dbus.service.Object):
401
self.remove()
402
if self.group is None:
403
self.group = dbus.Interface(
404
self.bus.get_object(avahi.DBUS_NAME,
405
self.server.EntryGroupNew()),
406
avahi.DBUS_INTERFACE_ENTRY_GROUP)
407
self.entry_group_state_changed_match = (
408
self.group.connect_to_signal(
409
'StateChanged', self.entry_group_state_changed))
410
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
411
self.name, self.type)
412
self.group.AddService(
413
self.interface,
414
self.protocol,
415
dbus.UInt32(0), # flags
416
self.name, self.type,
417
self.domain, self.host,
418
dbus.UInt16(self.port),
419
avahi.string_array_to_txt_array(self.TXT))
420
self.group.Commit()
421
422
def entry_group_state_changed(self, state, error):
423
"""Derived from the Avahi example code"""
424
logger.debug("Avahi entry group state change: %i", state)
425
426
if state == avahi.ENTRY_GROUP_ESTABLISHED:
427
logger.debug("Zeroconf service established.")
428
elif state == avahi.ENTRY_GROUP_COLLISION:
429
logger.info("Zeroconf service name collision.")
430
self.rename()
431
elif state == avahi.ENTRY_GROUP_FAILURE:
432
logger.critical("Avahi: Error in group state changed %s",
433
str(error))
434
raise AvahiGroupError("State changed: {!s}".format(error))
435
436
def cleanup(self):
437
"""Derived from the Avahi example code"""
438
if self.group is not None:
439
try:
440
self.group.Free()
441
except (dbus.exceptions.UnknownMethodException,
442
dbus.exceptions.DBusException):
443
pass
444
self.group = None
445
self.remove()
446
447
def server_state_changed(self, state, error=None):
448
"""Derived from the Avahi example code"""
449
logger.debug("Avahi server state change: %i", state)
450
bad_states = {
451
avahi.SERVER_INVALID: "Zeroconf server invalid",
452
avahi.SERVER_REGISTERING: None,
453
avahi.SERVER_COLLISION: "Zeroconf server name collision",
454
avahi.SERVER_FAILURE: "Zeroconf server failure",
455
}
456
if state in bad_states:
457
if bad_states[state] is not None:
458
if error is None:
459
logger.error(bad_states[state])
460
else:
461
logger.error(bad_states[state] + ": %r", error)
462
self.cleanup()
463
elif state == avahi.SERVER_RUNNING:
464
try:
465
self.add()
466
except dbus.exceptions.DBusException as error:
467
if (error.get_dbus_name()
468
== "org.freedesktop.Avahi.CollisionError"):
469
logger.info("Local Zeroconf service name"
470
" collision.")
471
return self.rename(remove=False)
472
else:
473
logger.critical("D-Bus Exception", exc_info=error)
474
self.cleanup()
475
os._exit(1)
476
else:
477
if error is None:
478
logger.debug("Unknown state: %r", state)
479
else:
480
logger.debug("Unknown state: %r: %r", state, error)
481
482
def activate(self):
483
"""Derived from the Avahi example code"""
484
if self.server is None:
485
self.server = dbus.Interface(
486
self.bus.get_object(avahi.DBUS_NAME,
487
avahi.DBUS_PATH_SERVER,
488
follow_name_owner_changes=True),
489
avahi.DBUS_INTERFACE_SERVER)
490
self.server.connect_to_signal("StateChanged",
491
self.server_state_changed)
492
self.server_state_changed(self.server.GetState())
493
494
495
class AvahiServiceToSyslog(AvahiService):
496
def rename(self, *args, **kwargs):
497
"""Add the new name to the syslog messages"""
498
ret = super(AvahiServiceToSyslog, self).rename(*args, **kwargs)
499
syslogger.setFormatter(logging.Formatter(
500
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
501
.format(self.name)))
502
return ret
503
504
505
# Pretend that we have a GnuTLS module
506
class gnutls(object):
507
"""This isn't so much a class as it is a module-like namespace."""
508
509
library = ctypes.util.find_library("gnutls")
510
if library is None:
511
library = ctypes.util.find_library("gnutls-deb0")
512
_library = ctypes.cdll.LoadLibrary(library)
513
del library
514
515
# Unless otherwise indicated, the constants and types below are
516
# all from the gnutls/gnutls.h C header file.
517
518
# Constants
519
E_SUCCESS = 0
520
E_INTERRUPTED = -52
521
E_AGAIN = -28
522
CRT_OPENPGP = 2
523
CRT_RAWPK = 3
524
CLIENT = 2
525
SHUT_RDWR = 0
526
CRD_CERTIFICATE = 1
527
E_NO_CERTIFICATE_FOUND = -49
528
X509_FMT_DER = 0
529
NO_TICKETS = 1<<10
530
ENABLE_RAWPK = 1<<18
531
CTYPE_PEERS = 3
532
KEYID_USE_SHA256 = 1 # gnutls/x509.h
533
OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
534
535
# Types
536
class session_int(ctypes.Structure):
537
_fields_ = []
538
session_t = ctypes.POINTER(session_int)
539
540
class certificate_credentials_st(ctypes.Structure):
541
_fields_ = []
542
certificate_credentials_t = ctypes.POINTER(
543
certificate_credentials_st)
544
certificate_type_t = ctypes.c_int
545
546
class datum_t(ctypes.Structure):
547
_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
548
('size', ctypes.c_uint)]
549
550
class openpgp_crt_int(ctypes.Structure):
551
_fields_ = []
552
openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
553
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
554
log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
555
credentials_type_t = ctypes.c_int
556
transport_ptr_t = ctypes.c_void_p
557
close_request_t = ctypes.c_int
558
559
# Exceptions
560
class Error(Exception):
561
def __init__(self, message=None, code=None, args=()):
562
# Default usage is by a message string, but if a return
563
# code is passed, convert it to a string with
564
# gnutls.strerror()
565
self.code = code
566
if message is None and code is not None:
567
message = gnutls.strerror(code)
568
return super(gnutls.Error, self).__init__(
569
message, *args)
570
571
class CertificateSecurityError(Error):
572
pass
573
574
# Classes
575
class Credentials(object):
576
def __init__(self):
577
self._c_object = gnutls.certificate_credentials_t()
578
gnutls.certificate_allocate_credentials(
579
ctypes.byref(self._c_object))
580
self.type = gnutls.CRD_CERTIFICATE
581
582
def __del__(self):
583
gnutls.certificate_free_credentials(self._c_object)
584
585
class ClientSession(object):
586
def __init__(self, socket, credentials=None):
587
self._c_object = gnutls.session_t()
588
gnutls_flags = gnutls.CLIENT
589
if gnutls.check_version("3.5.6"):
590
gnutls_flags |= gnutls.NO_TICKETS
591
if gnutls.has_rawpk:
592
gnutls_flags |= gnutls.ENABLE_RAWPK
593
gnutls.init(ctypes.byref(self._c_object), gnutls_flags)
594
del gnutls_flags
595
gnutls.set_default_priority(self._c_object)
596
gnutls.transport_set_ptr(self._c_object, socket.fileno())
597
gnutls.handshake_set_private_extensions(self._c_object,
598
True)
599
self.socket = socket
600
if credentials is None:
601
credentials = gnutls.Credentials()
602
gnutls.credentials_set(self._c_object, credentials.type,
603
ctypes.cast(credentials._c_object,
604
ctypes.c_void_p))
605
self.credentials = credentials
606
607
def __del__(self):
608
gnutls.deinit(self._c_object)
609
610
def handshake(self):
611
return gnutls.handshake(self._c_object)
612
613
def send(self, data):
614
data = bytes(data)
615
data_len = len(data)
616
while data_len > 0:
617
data_len -= gnutls.record_send(self._c_object,
618
data[-data_len:],
619
data_len)
620
621
def bye(self):
622
return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
623
624
# Error handling functions
625
def _error_code(result):
626
"""A function to raise exceptions on errors, suitable
627
for the 'restype' attribute on ctypes functions"""
628
if result >= 0:
629
return result
630
if result == gnutls.E_NO_CERTIFICATE_FOUND:
631
raise gnutls.CertificateSecurityError(code=result)
632
raise gnutls.Error(code=result)
633
634
def _retry_on_error(result, func, arguments):
635
"""A function to retry on some errors, suitable
636
for the 'errcheck' attribute on ctypes functions"""
637
while result < 0:
638
if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
639
return _error_code(result)
640
result = func(*arguments)
641
return result
642
643
# Unless otherwise indicated, the function declarations below are
644
# all from the gnutls/gnutls.h C header file.
645
646
# Functions
647
priority_set_direct = _library.gnutls_priority_set_direct
648
priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
649
ctypes.POINTER(ctypes.c_char_p)]
650
priority_set_direct.restype = _error_code
651
652
init = _library.gnutls_init
653
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
654
init.restype = _error_code
655
656
set_default_priority = _library.gnutls_set_default_priority
657
set_default_priority.argtypes = [session_t]
658
set_default_priority.restype = _error_code
659
660
record_send = _library.gnutls_record_send
661
record_send.argtypes = [session_t, ctypes.c_void_p,
662
ctypes.c_size_t]
663
record_send.restype = ctypes.c_ssize_t
664
record_send.errcheck = _retry_on_error
665
666
certificate_allocate_credentials = (
667
_library.gnutls_certificate_allocate_credentials)
668
certificate_allocate_credentials.argtypes = [
669
ctypes.POINTER(certificate_credentials_t)]
670
certificate_allocate_credentials.restype = _error_code
671
672
certificate_free_credentials = (
673
_library.gnutls_certificate_free_credentials)
674
certificate_free_credentials.argtypes = [
675
certificate_credentials_t]
676
certificate_free_credentials.restype = None
677
678
handshake_set_private_extensions = (
679
_library.gnutls_handshake_set_private_extensions)
680
handshake_set_private_extensions.argtypes = [session_t,
681
ctypes.c_int]
682
handshake_set_private_extensions.restype = None
683
684
credentials_set = _library.gnutls_credentials_set
685
credentials_set.argtypes = [session_t, credentials_type_t,
686
ctypes.c_void_p]
687
credentials_set.restype = _error_code
688
689
strerror = _library.gnutls_strerror
690
strerror.argtypes = [ctypes.c_int]
691
strerror.restype = ctypes.c_char_p
692
693
certificate_type_get = _library.gnutls_certificate_type_get
694
certificate_type_get.argtypes = [session_t]
695
certificate_type_get.restype = _error_code
696
697
certificate_get_peers = _library.gnutls_certificate_get_peers
698
certificate_get_peers.argtypes = [session_t,
699
ctypes.POINTER(ctypes.c_uint)]
700
certificate_get_peers.restype = ctypes.POINTER(datum_t)
701
702
global_set_log_level = _library.gnutls_global_set_log_level
703
global_set_log_level.argtypes = [ctypes.c_int]
704
global_set_log_level.restype = None
705
706
global_set_log_function = _library.gnutls_global_set_log_function
707
global_set_log_function.argtypes = [log_func]
708
global_set_log_function.restype = None
709
710
deinit = _library.gnutls_deinit
711
deinit.argtypes = [session_t]
712
deinit.restype = None
713
714
handshake = _library.gnutls_handshake
715
handshake.argtypes = [session_t]
716
handshake.restype = _error_code
717
handshake.errcheck = _retry_on_error
718
719
transport_set_ptr = _library.gnutls_transport_set_ptr
720
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
721
transport_set_ptr.restype = None
722
723
bye = _library.gnutls_bye
724
bye.argtypes = [session_t, close_request_t]
725
bye.restype = _error_code
726
bye.errcheck = _retry_on_error
727
728
check_version = _library.gnutls_check_version
729
check_version.argtypes = [ctypes.c_char_p]
730
check_version.restype = ctypes.c_char_p
731
732
_need_version = b"3.3.0"
733
if check_version(_need_version) is None:
734
raise self.Error("Needs GnuTLS {} or later"
735
.format(_need_version))
736
737
_tls_rawpk_version = b"3.6.6"
738
has_rawpk = bool(check_version(_tls_rawpk_version))
739
740
if has_rawpk:
741
# Types
742
class pubkey_st(ctypes.Structure):
743
_fields = []
744
pubkey_t = ctypes.POINTER(pubkey_st)
745
746
x509_crt_fmt_t = ctypes.c_int
747
748
# All the function declarations below are from gnutls/abstract.h
749
pubkey_init = _library.gnutls_pubkey_init
750
pubkey_init.argtypes = [ctypes.POINTER(pubkey_t)]
751
pubkey_init.restype = _error_code
752
753
pubkey_import = _library.gnutls_pubkey_import
754
pubkey_import.argtypes = [pubkey_t, ctypes.POINTER(datum_t),
755
x509_crt_fmt_t]
756
pubkey_import.restype = _error_code
757
758
pubkey_get_key_id = _library.gnutls_pubkey_get_key_id
759
pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,
760
ctypes.POINTER(ctypes.c_ubyte),
761
ctypes.POINTER(ctypes.c_size_t)]
762
pubkey_get_key_id.restype = _error_code
763
764
pubkey_deinit = _library.gnutls_pubkey_deinit
765
pubkey_deinit.argtypes = [pubkey_t]
766
pubkey_deinit.restype = None
767
else:
768
# All the function declarations below are from gnutls/openpgp.h
769
770
openpgp_crt_init = _library.gnutls_openpgp_crt_init
771
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
772
openpgp_crt_init.restype = _error_code
773
774
openpgp_crt_import = _library.gnutls_openpgp_crt_import
775
openpgp_crt_import.argtypes = [openpgp_crt_t,
776
ctypes.POINTER(datum_t),
777
openpgp_crt_fmt_t]
778
openpgp_crt_import.restype = _error_code
779
780
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
781
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
782
ctypes.POINTER(ctypes.c_uint)]
783
openpgp_crt_verify_self.restype = _error_code
784
785
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
786
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
787
openpgp_crt_deinit.restype = None
788
789
openpgp_crt_get_fingerprint = (
790
_library.gnutls_openpgp_crt_get_fingerprint)
791
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
792
ctypes.c_void_p,
793
ctypes.POINTER(
794
ctypes.c_size_t)]
795
openpgp_crt_get_fingerprint.restype = _error_code
796
797
if check_version("3.6.4"):
798
certificate_type_get2 = _library.gnutls_certificate_type_get2
799
certificate_type_get2.argtypes = [session_t, ctypes.c_int]
800
certificate_type_get2.restype = _error_code
801
802
# Remove non-public functions
803
del _error_code, _retry_on_error
804
805
806
def call_pipe(connection, # : multiprocessing.Connection
807
func, *args, **kwargs):
808
"""This function is meant to be called by multiprocessing.Process
809
810
This function runs func(*args, **kwargs), and writes the resulting
811
return value on the provided multiprocessing.Connection.
812
"""
813
connection.send(func(*args, **kwargs))
814
connection.close()
815
816
817
class Client(object):
179
818
"""A representation of a client host served by this server.
819
180
820
Attributes:
181
name: string; from the config file, used in log messages
182
fingerprint: string (40 or 32 hexadecimal digits); used to
183
uniquely identify the client
184
secret: bytestring; sent verbatim (over TLS) to client
185
host: string; available for use by the checker command
186
created: datetime.datetime(); (UTC) object creation
187
last_enabled: datetime.datetime(); (UTC)
188
enabled: bool()
189
last_checked_ok: datetime.datetime(); (UTC) or None
190
timeout: datetime.timedelta(); How long from last_checked_ok
191
until this client is invalid
192
interval: datetime.timedelta(); How often to start a new checker
193
disable_hook: If set, called by disable() as disable_hook(self)
821
approved: bool(); 'None' if not yet approved/disapproved
822
approval_delay: datetime.timedelta(); Time to wait for approval
823
approval_duration: datetime.timedelta(); Duration of one approval
194
824
checker: subprocess.Popen(); a running checker process used
195
825
to see if the client lives.
196
826
'None' if no process is running.
197
checker_initiator_tag: a gobject event source tag, or None
198
disable_initiator_tag: - '' -
199
checker_callback_tag: - '' -
200
checker_command: string; External command which is run to check if
201
client lives. %() expansions are done at
827
checker_callback_tag: a GLib event source tag, or None
828
checker_command: string; External command which is run to check
829
if client lives. %() expansions are done at
202
830
runtime with vars(self) as dict, so that for
203
831
instance %(name)s can be used in the command.
204
use_dbus: bool(); Whether to provide D-Bus interface and signals
205
dbus_object_path: dbus.ObjectPath ; only set if self.use_dbus
832
checker_initiator_tag: a GLib event source tag, or None
833
created: datetime.datetime(); (UTC) object creation
834
client_structure: Object describing what attributes a client has
835
and is used for storing the client at exit
836
current_checker_command: string; current running checker_command
837
disable_initiator_tag: a GLib event source tag, or None
838
enabled: bool()
839
fingerprint: string (40 or 32 hexadecimal digits); used to
840
uniquely identify an OpenPGP client
841
key_id: string (64 hexadecimal digits); used to uniquely identify
842
a client using raw public keys
843
host: string; available for use by the checker command
844
interval: datetime.timedelta(); How often to start a new checker
845
last_approval_request: datetime.datetime(); (UTC) or None
846
last_checked_ok: datetime.datetime(); (UTC) or None
847
last_checker_status: integer between 0 and 255 reflecting exit
848
status of last checker. -1 reflects crashed
849
checker, -2 means no checker completed yet.
850
last_checker_signal: The signal which killed the last checker, if
851
last_checker_status is -1
852
last_enabled: datetime.datetime(); (UTC) or None
853
name: string; from the config file, used in log messages and
854
D-Bus identifiers
855
secret: bytestring; sent verbatim (over TLS) to client
856
timeout: datetime.timedelta(); How long from last_checked_ok
857
until this client is disabled
858
extended_timeout: extra long timeout when secret has been sent
859
runtime_expansions: Allowed attributes for runtime expansion.
860
expires: datetime.datetime(); time (UTC) when a client will be
861
disabled, or None
862
server_settings: The server_settings dict from main()
206
863
"""
207
def timeout_milliseconds(self):
208
"Return the 'timeout' attribute in milliseconds"
209
return ((self.timeout.days * 24 * 60 * 60 * 1000)
210
+ (self.timeout.seconds * 1000)
211
+ (self.timeout.microseconds // 1000))
212
213
def interval_milliseconds(self):
214
"Return the 'interval' attribute in milliseconds"
215
return ((self.interval.days * 24 * 60 * 60 * 1000)
216
+ (self.interval.seconds * 1000)
217
+ (self.interval.microseconds // 1000))
218
219
def __init__(self, name = None, disable_hook=None, config=None,
220
use_dbus=True):
221
"""Note: the 'checker' key in 'config' sets the
222
'checker_command' attribute and *not* the 'checker'
223
attribute."""
864
865
runtime_expansions = ("approval_delay", "approval_duration",
866
"created", "enabled", "expires", "key_id",
867
"fingerprint", "host", "interval",
868
"last_approval_request", "last_checked_ok",
869
"last_enabled", "name", "timeout")
870
client_defaults = {
871
"timeout": "PT5M",
872
"extended_timeout": "PT15M",
873
"interval": "PT2M",
874
"checker": "fping -q -- %%(host)s",
875
"host": "",
876
"approval_delay": "PT0S",
877
"approval_duration": "PT1S",
878
"approved_by_default": "True",
879
"enabled": "True",
880
}
881
882
@staticmethod
883
def config_parser(config):
884
"""Construct a new dict of client settings of this form:
885
{ client_name: {setting_name: value, ...}, ...}
886
with exceptions for any special settings as defined above.
887
NOTE: Must be a pure function. Must return the same result
888
value given the same arguments.
889
"""
890
settings = {}
891
for client_name in config.sections():
892
section = dict(config.items(client_name))
893
client = settings[client_name] = {}
894
895
client["host"] = section["host"]
896
# Reformat values from string types to Python types
897
client["approved_by_default"] = config.getboolean(
898
client_name, "approved_by_default")
899
client["enabled"] = config.getboolean(client_name,
900
"enabled")
901
902
# Uppercase and remove spaces from key_id and fingerprint
903
# for later comparison purposes with return value from the
904
# key_id() and fingerprint() functions
905
client["key_id"] = (section.get("key_id", "").upper()
906
.replace(" ", ""))
907
client["fingerprint"] = (section["fingerprint"].upper()
908
.replace(" ", ""))
909
if "secret" in section:
910
client["secret"] = codecs.decode(section["secret"]
911
.encode("utf-8"),
912
"base64")
913
elif "secfile" in section:
914
with open(os.path.expanduser(os.path.expandvars
915
(section["secfile"])),
916
"rb") as secfile:
917
client["secret"] = secfile.read()
918
else:
919
raise TypeError("No secret or secfile for section {}"
920
.format(section))
921
client["timeout"] = string_to_delta(section["timeout"])
922
client["extended_timeout"] = string_to_delta(
923
section["extended_timeout"])
924
client["interval"] = string_to_delta(section["interval"])
925
client["approval_delay"] = string_to_delta(
926
section["approval_delay"])
927
client["approval_duration"] = string_to_delta(
928
section["approval_duration"])
929
client["checker_command"] = section["checker"]
930
client["last_approval_request"] = None
931
client["last_checked_ok"] = None
932
client["last_checker_status"] = -2
933
934
return settings
935
936
def __init__(self, settings, name=None, server_settings=None):
224
937
self.name = name
225
if config is None:
226
config = {}
227
logger.debug(u"Creating client %r", self.name)
228
self.use_dbus = use_dbus
229
if self.use_dbus:
230
self.dbus_object_path = (dbus.ObjectPath
231
("/Mandos/clients/"
232
+ self.name.replace(".", "_")))
233
dbus.service.Object.__init__(self, bus,
234
self.dbus_object_path)
235
# Uppercase and remove spaces from fingerprint for later
236
# comparison purposes with return value from the fingerprint()
237
# function
238
self.fingerprint = (config["fingerprint"].upper()
239
.replace(u" ", u""))
240
logger.debug(u" Fingerprint: %s", self.fingerprint)
241
if "secret" in config:
242
self.secret = config["secret"].decode(u"base64")
243
elif "secfile" in config:
244
with closing(open(os.path.expanduser
245
(os.path.expandvars
246
(config["secfile"])))) as secfile:
247
self.secret = secfile.read()
938
if server_settings is None:
939
server_settings = {}
940
self.server_settings = server_settings
941
# adding all client settings
942
for setting, value in settings.items():
943
setattr(self, setting, value)
944
945
if self.enabled:
946
if not hasattr(self, "last_enabled"):
947
self.last_enabled = datetime.datetime.utcnow()
948
if not hasattr(self, "expires"):
949
self.expires = (datetime.datetime.utcnow()
950
+ self.timeout)
248
951
else:
249
raise TypeError(u"No secret or secfile for client %s"
250
% self.name)
251
self.host = config.get("host", "")
252
self.created = datetime.datetime.utcnow()
253
self.enabled = False
254
self.last_enabled = None
255
self.last_checked_ok = None
256
self.timeout = string_to_delta(config["timeout"])
257
self.interval = string_to_delta(config["interval"])
258
self.disable_hook = disable_hook
952
self.last_enabled = None
953
self.expires = None
954
955
logger.debug("Creating client %r", self.name)
956
logger.debug(" Key ID: %s", self.key_id)
957
logger.debug(" Fingerprint: %s", self.fingerprint)
958
self.created = settings.get("created",
959
datetime.datetime.utcnow())
960
961
# attributes specific for this server instance
259
962
self.checker = None
260
963
self.checker_initiator_tag = None
261
964
self.disable_initiator_tag = None
262
965
self.checker_callback_tag = None
263
self.checker_command = config["checker"]
264
966
self.current_checker_command = None
967
self.approved = None
968
self.approvals_pending = 0
969
self.changedstate = multiprocessing_manager.Condition(
970
multiprocessing_manager.Lock())
971
self.client_structure = [attr
972
for attr in self.__dict__.keys()
973
if not attr.startswith("_")]
974
self.client_structure.append("client_structure")
975
976
for name, t in inspect.getmembers(
977
type(self), lambda obj: isinstance(obj, property)):
978
if not name.startswith("_"):
979
self.client_structure.append(name)
980
981
# Send notice to process children that client state has changed
982
def send_changedstate(self):
983
with self.changedstate:
984
self.changedstate.notify_all()
985
265
986
def enable(self):
266
987
"""Start this client's checker and timeout hooks"""
988
if getattr(self, "enabled", False):
989
# Already enabled
990
return
991
self.expires = datetime.datetime.utcnow() + self.timeout
992
self.enabled = True
267
993
self.last_enabled = datetime.datetime.utcnow()
994
self.init_checker()
995
self.send_changedstate()
996
997
def disable(self, quiet=True):
998
"""Disable this client."""
999
if not getattr(self, "enabled", False):
1000
return False
1001
if not quiet:
1002
logger.info("Disabling client %s", self.name)
1003
if getattr(self, "disable_initiator_tag", None) is not None:
1004
GLib.source_remove(self.disable_initiator_tag)
1005
self.disable_initiator_tag = None
1006
self.expires = None
1007
if getattr(self, "checker_initiator_tag", None) is not None:
1008
GLib.source_remove(self.checker_initiator_tag)
1009
self.checker_initiator_tag = None
1010
self.stop_checker()
1011
self.enabled = False
1012
if not quiet:
1013
self.send_changedstate()
1014
# Do not run this again if called by a GLib.timeout_add
1015
return False
1016
1017
def __del__(self):
1018
self.disable()
1019
1020
def init_checker(self):
268
1021
# Schedule a new checker to be started an 'interval' from now,
269
1022
# and every interval from then on.
270
self.checker_initiator_tag = (gobject.timeout_add
271
(self.interval_milliseconds(),
272
self.start_checker))
1023
if self.checker_initiator_tag is not None:
1024
GLib.source_remove(self.checker_initiator_tag)
1025
self.checker_initiator_tag = GLib.timeout_add(
1026
int(self.interval.total_seconds() * 1000),
1027
self.start_checker)
1028
# Schedule a disable() when 'timeout' has passed
1029
if self.disable_initiator_tag is not None:
1030
GLib.source_remove(self.disable_initiator_tag)
1031
self.disable_initiator_tag = GLib.timeout_add(
1032
int(self.timeout.total_seconds() * 1000), self.disable)
273
1033
# Also start a new checker *right now*.
274
1034
self.start_checker()
275
# Schedule a disable() when 'timeout' has passed
276
self.disable_initiator_tag = (gobject.timeout_add
277
(self.timeout_milliseconds(),
278
self.disable))
279
self.enabled = True
280
if self.use_dbus:
281
# Emit D-Bus signals
282
self.PropertyChanged(dbus.String(u"enabled"),
283
dbus.Boolean(True, variant_level=1))
284
self.PropertyChanged(dbus.String(u"last_enabled"),
285
(_datetime_to_dbus(self.last_enabled,
286
variant_level=1)))
287
288
def disable(self):
289
"""Disable this client."""
290
if not getattr(self, "enabled", False):
291
return False
292
logger.info(u"Disabling client %s", self.name)
293
if getattr(self, "disable_initiator_tag", False):
294
gobject.source_remove(self.disable_initiator_tag)
295
self.disable_initiator_tag = None
296
if getattr(self, "checker_initiator_tag", False):
297
gobject.source_remove(self.checker_initiator_tag)
298
self.checker_initiator_tag = None
299
self.stop_checker()
300
if self.disable_hook:
301
self.disable_hook(self)
302
self.enabled = False
303
if self.use_dbus:
304
# Emit D-Bus signal
305
self.PropertyChanged(dbus.String(u"enabled"),
306
dbus.Boolean(False, variant_level=1))
307
# Do not run this again if called by a gobject.timeout_add
308
return False
309
310
def __del__(self):
311
self.disable_hook = None
312
self.disable()
313
314
def checker_callback(self, pid, condition, command):
1035
1036
def checker_callback(self, source, condition, connection,
1037
command):
315
1038
"""The checker has completed, so take appropriate actions."""
316
1039
self.checker_callback_tag = None
317
1040
self.checker = None
318
if self.use_dbus:
319
# Emit D-Bus signal
320
self.PropertyChanged(dbus.String(u"checker_running"),
321
dbus.Boolean(False, variant_level=1))
322
if (os.WIFEXITED(condition)
323
and (os.WEXITSTATUS(condition) == 0)):
324
logger.info(u"Checker for %(name)s succeeded",
325
vars(self))
326
if self.use_dbus:
327
# Emit D-Bus signal
328
self.CheckerCompleted(dbus.Boolean(True),
329
dbus.UInt16(condition),
330
dbus.String(command))
331
self.bump_timeout()
332
elif not os.WIFEXITED(condition):
333
logger.warning(u"Checker for %(name)s crashed?",
1041
# Read return code from connection (see call_pipe)
1042
returncode = connection.recv()
1043
connection.close()
1044
1045
if returncode >= 0:
1046
self.last_checker_status = returncode
1047
self.last_checker_signal = None
1048
if self.last_checker_status == 0:
1049
logger.info("Checker for %(name)s succeeded",
1050
vars(self))
1051
self.checked_ok()
1052
else:
1053
logger.info("Checker for %(name)s failed", vars(self))
1054
else:
1055
self.last_checker_status = -1
1056
self.last_checker_signal = -returncode
1057
logger.warning("Checker for %(name)s crashed?",
334
1058
vars(self))
335
if self.use_dbus:
336
# Emit D-Bus signal
337
self.CheckerCompleted(dbus.Boolean(False),
338
dbus.UInt16(condition),
339
dbus.String(command))
340
else:
341
logger.info(u"Checker for %(name)s failed",
342
vars(self))
343
if self.use_dbus:
344
# Emit D-Bus signal
345
self.CheckerCompleted(dbus.Boolean(False),
346
dbus.UInt16(condition),
347
dbus.String(command))
348
349
def bump_timeout(self):
350
"""Bump up the timeout for this client.
351
This should only be called when the client has been seen,
352
alive and well.
353
"""
1059
return False
1060
1061
def checked_ok(self):
1062
"""Assert that the client has been seen, alive and well."""
354
1063
self.last_checked_ok = datetime.datetime.utcnow()
355
gobject.source_remove(self.disable_initiator_tag)
356
self.disable_initiator_tag = (gobject.timeout_add
357
(self.timeout_milliseconds(),
358
self.disable))
359
if self.use_dbus:
360
# Emit D-Bus signal
361
self.PropertyChanged(
362
dbus.String(u"last_checked_ok"),
363
(_datetime_to_dbus(self.last_checked_ok,
364
variant_level=1)))
365
1064
self.last_checker_status = 0
1065
self.last_checker_signal = None
1066
self.bump_timeout()
1067
1068
def bump_timeout(self, timeout=None):
1069
"""Bump up the timeout for this client."""
1070
if timeout is None:
1071
timeout = self.timeout
1072
if self.disable_initiator_tag is not None:
1073
GLib.source_remove(self.disable_initiator_tag)
1074
self.disable_initiator_tag = None
1075
if getattr(self, "enabled", False):
1076
self.disable_initiator_tag = GLib.timeout_add(
1077
int(timeout.total_seconds() * 1000), self.disable)
1078
self.expires = datetime.datetime.utcnow() + timeout
1079
1080
def need_approval(self):
1081
self.last_approval_request = datetime.datetime.utcnow()
1082
366
1083
def start_checker(self):
367
1084
"""Start a new checker subprocess if one is not running.
1085
368
1086
If a checker already exists, leave it running and do
369
1087
nothing."""
370
1088
# The reason for not killing a running checker is that if we
371
# did that, then if a checker (for some reason) started
372
# running slowly and taking more than 'interval' time, the
373
# client would inevitably timeout, since no checker would get
374
# a chance to run to completion. If we instead leave running
1089
# did that, and if a checker (for some reason) started running
1090
# slowly and taking more than 'interval' time, then the client
1091
# would inevitably timeout, since no checker would get a
1092
# chance to run to completion. If we instead leave running
375
1093
# checkers alone, the checker would have to take more time
376
# than 'timeout' for the client to be declared invalid, which
377
# is as it should be.
1094
# than 'timeout' for the client to be disabled, which is as it
1095
# should be.
1096
1097
if self.checker is not None and not self.checker.is_alive():
1098
logger.warning("Checker was not alive; joining")
1099
self.checker.join()
1100
self.checker = None
1101
# Start a new checker if needed
378
1102
if self.checker is None:
379
try:
380
# In case checker_command has exactly one % operator
381
command = self.checker_command % self.host
382
except TypeError:
383
# Escape attributes for the shell
384
escaped_attrs = dict((key, re.escape(str(val)))
385
for key, val in
386
vars(self).iteritems())
387
try:
388
command = self.checker_command % escaped_attrs
389
except TypeError, error:
390
logger.error(u'Could not format string "%s":'
391
u' %s', self.checker_command, error)
392
return True # Try again later
393
try:
394
logger.info(u"Starting checker %r for %s",
395
command, self.name)
396
# We don't need to redirect stdout and stderr, since
397
# in normal mode, that is already done by daemon(),
398
# and in debug mode we don't want to. (Stdin is
399
# always replaced by /dev/null.)
400
self.checker = subprocess.Popen(command,
401
close_fds=True,
402
shell=True, cwd="/")
403
if self.use_dbus:
404
# Emit D-Bus signal
405
self.CheckerStarted(command)
406
self.PropertyChanged(
407
dbus.String("checker_running"),
408
dbus.Boolean(True, variant_level=1))
409
self.checker_callback_tag = (gobject.child_watch_add
410
(self.checker.pid,
411
self.checker_callback,
412
data=command))
413
except OSError, error:
414
logger.error(u"Failed to start subprocess: %s",
415
error)
416
# Re-run this periodically if run by gobject.timeout_add
1103
# Escape attributes for the shell
1104
escaped_attrs = {
1105
attr: re.escape(str(getattr(self, attr)))
1106
for attr in self.runtime_expansions}
1107
try:
1108
command = self.checker_command % escaped_attrs
1109
except TypeError as error:
1110
logger.error('Could not format string "%s"',
1111
self.checker_command,
1112
exc_info=error)
1113
return True # Try again later
1114
self.current_checker_command = command
1115
logger.info("Starting checker %r for %s", command,
1116
self.name)
1117
# We don't need to redirect stdout and stderr, since
1118
# in normal mode, that is already done by daemon(),
1119
# and in debug mode we don't want to. (Stdin is
1120
# always replaced by /dev/null.)
1121
# The exception is when not debugging but nevertheless
1122
# running in the foreground; use the previously
1123
# created wnull.
1124
popen_args = {"close_fds": True,
1125
"shell": True,
1126
"cwd": "/"}
1127
if (not self.server_settings["debug"]
1128
and self.server_settings["foreground"]):
1129
popen_args.update({"stdout": wnull,
1130
"stderr": wnull})
1131
pipe = multiprocessing.Pipe(duplex=False)
1132
self.checker = multiprocessing.Process(
1133
target=call_pipe,
1134
args=(pipe[1], subprocess.call, command),
1135
kwargs=popen_args)
1136
self.checker.start()
1137
self.checker_callback_tag = GLib.io_add_watch(
1138
pipe[0].fileno(), GLib.IO_IN,
1139
self.checker_callback, pipe[0], command)
1140
# Re-run this periodically if run by GLib.timeout_add
417
1141
return True
418
1142
419
1143
def stop_checker(self):
420
1144
"""Force the checker process, if any, to stop."""
421
1145
if self.checker_callback_tag:
422
gobject.source_remove(self.checker_callback_tag)
1146
GLib.source_remove(self.checker_callback_tag)
423
1147
self.checker_callback_tag = None
424
1148
if getattr(self, "checker", None) is None:
425
1149
return
426
logger.debug(u"Stopping checker for %(name)s", vars(self))
427
try:
428
os.kill(self.checker.pid, signal.SIGTERM)
429
#os.sleep(0.5)
430
#if self.checker.poll() is None:
431
# os.kill(self.checker.pid, signal.SIGKILL)
432
except OSError, error:
433
if error.errno != errno.ESRCH: # No such process
434
raise
1150
logger.debug("Stopping checker for %(name)s", vars(self))
1151
self.checker.terminate()
435
1152
self.checker = None
436
if self.use_dbus:
437
self.PropertyChanged(dbus.String(u"checker_running"),
438
dbus.Boolean(False, variant_level=1))
439
440
def still_valid(self):
441
"""Has the timeout not yet passed for this client?"""
442
if not getattr(self, "enabled", False):
443
return False
444
now = datetime.datetime.utcnow()
445
if self.last_checked_ok is None:
446
return now < (self.created + self.timeout)
1153
1154
1155
def dbus_service_property(dbus_interface,
1156
signature="v",
1157
access="readwrite",
1158
byte_arrays=False):
1159
"""Decorators for marking methods of a DBusObjectWithProperties to
1160
become properties on the D-Bus.
1161
1162
The decorated method will be called with no arguments by "Get"
1163
and with one argument by "Set".
1164
1165
The parameters, where they are supported, are the same as
1166
dbus.service.method, except there is only "signature", since the
1167
type from Get() and the type sent to Set() is the same.
1168
"""
1169
# Encoding deeply encoded byte arrays is not supported yet by the
1170
# "Set" method, so we fail early here:
1171
if byte_arrays and signature != "ay":
1172
raise ValueError("Byte arrays not supported for non-'ay'"
1173
" signature {!r}".format(signature))
1174
1175
def decorator(func):
1176
func._dbus_is_property = True
1177
func._dbus_interface = dbus_interface
1178
func._dbus_signature = signature
1179
func._dbus_access = access
1180
func._dbus_name = func.__name__
1181
if func._dbus_name.endswith("_dbus_property"):
1182
func._dbus_name = func._dbus_name[:-14]
1183
func._dbus_get_args_options = {'byte_arrays': byte_arrays}
1184
return func
1185
1186
return decorator
1187
1188
1189
def dbus_interface_annotations(dbus_interface):
1190
"""Decorator for marking functions returning interface annotations
1191
1192
Usage:
1193
1194
@dbus_interface_annotations("org.example.Interface")
1195
def _foo(self): # Function name does not matter
1196
return {"org.freedesktop.DBus.Deprecated": "true",
1197
"org.freedesktop.DBus.Property.EmitsChangedSignal":
1198
"false"}
1199
"""
1200
1201
def decorator(func):
1202
func._dbus_is_interface = True
1203
func._dbus_interface = dbus_interface
1204
func._dbus_name = dbus_interface
1205
return func
1206
1207
return decorator
1208
1209
1210
def dbus_annotations(annotations):
1211
"""Decorator to annotate D-Bus methods, signals or properties
1212
Usage:
1213
1214
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
1215
"org.freedesktop.DBus.Property."
1216
"EmitsChangedSignal": "false"})
1217
@dbus_service_property("org.example.Interface", signature="b",
1218
access="r")
1219
def Property_dbus_property(self):
1220
return dbus.Boolean(False)
1221
1222
See also the DBusObjectWithAnnotations class.
1223
"""
1224
1225
def decorator(func):
1226
func._dbus_annotations = annotations
1227
return func
1228
1229
return decorator
1230
1231
1232
class DBusPropertyException(dbus.exceptions.DBusException):
1233
"""A base class for D-Bus property-related exceptions
1234
"""
1235
pass
1236
1237
1238
class DBusPropertyAccessException(DBusPropertyException):
1239
"""A property's access permissions disallows an operation.
1240
"""
1241
pass
1242
1243
1244
class DBusPropertyNotFound(DBusPropertyException):
1245
"""An attempt was made to access a non-existing property.
1246
"""
1247
pass
1248
1249
1250
class DBusObjectWithAnnotations(dbus.service.Object):
1251
"""A D-Bus object with annotations.
1252
1253
Classes inheriting from this can use the dbus_annotations
1254
decorator to add annotations to methods or signals.
1255
"""
1256
1257
@staticmethod
1258
def _is_dbus_thing(thing):
1259
"""Returns a function testing if an attribute is a D-Bus thing
1260
1261
If called like _is_dbus_thing("method") it returns a function
1262
suitable for use as predicate to inspect.getmembers().
1263
"""
1264
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
1265
False)
1266
1267
def _get_all_dbus_things(self, thing):
1268
"""Returns a generator of (name, attribute) pairs
1269
"""
1270
return ((getattr(athing.__get__(self), "_dbus_name", name),
1271
athing.__get__(self))
1272
for cls in self.__class__.__mro__
1273
for name, athing in
1274
inspect.getmembers(cls, self._is_dbus_thing(thing)))
1275
1276
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1277
out_signature="s",
1278
path_keyword='object_path',
1279
connection_keyword='connection')
1280
def Introspect(self, object_path, connection):
1281
"""Overloading of standard D-Bus method.
1282
1283
Inserts annotation tags on methods and signals.
1284
"""
1285
xmlstring = dbus.service.Object.Introspect(self, object_path,
1286
connection)
1287
try:
1288
document = xml.dom.minidom.parseString(xmlstring)
1289
1290
for if_tag in document.getElementsByTagName("interface"):
1291
# Add annotation tags
1292
for typ in ("method", "signal"):
1293
for tag in if_tag.getElementsByTagName(typ):
1294
annots = dict()
1295
for name, prop in (self.
1296
_get_all_dbus_things(typ)):
1297
if (name == tag.getAttribute("name")
1298
and prop._dbus_interface
1299
== if_tag.getAttribute("name")):
1300
annots.update(getattr(
1301
prop, "_dbus_annotations", {}))
1302
for name, value in annots.items():
1303
ann_tag = document.createElement(
1304
"annotation")
1305
ann_tag.setAttribute("name", name)
1306
ann_tag.setAttribute("value", value)
1307
tag.appendChild(ann_tag)
1308
# Add interface annotation tags
1309
for annotation, value in dict(
1310
itertools.chain.from_iterable(
1311
annotations().items()
1312
for name, annotations
1313
in self._get_all_dbus_things("interface")
1314
if name == if_tag.getAttribute("name")
1315
)).items():
1316
ann_tag = document.createElement("annotation")
1317
ann_tag.setAttribute("name", annotation)
1318
ann_tag.setAttribute("value", value)
1319
if_tag.appendChild(ann_tag)
1320
# Fix argument name for the Introspect method itself
1321
if (if_tag.getAttribute("name")
1322
== dbus.INTROSPECTABLE_IFACE):
1323
for cn in if_tag.getElementsByTagName("method"):
1324
if cn.getAttribute("name") == "Introspect":
1325
for arg in cn.getElementsByTagName("arg"):
1326
if (arg.getAttribute("direction")
1327
== "out"):
1328
arg.setAttribute("name",
1329
"xml_data")
1330
xmlstring = document.toxml("utf-8")
1331
document.unlink()
1332
except (AttributeError, xml.dom.DOMException,
1333
xml.parsers.expat.ExpatError) as error:
1334
logger.error("Failed to override Introspection method",
1335
exc_info=error)
1336
return xmlstring
1337
1338
1339
class DBusObjectWithProperties(DBusObjectWithAnnotations):
1340
"""A D-Bus object with properties.
1341
1342
Classes inheriting from this can use the dbus_service_property
1343
decorator to expose methods as D-Bus properties. It exposes the
1344
standard Get(), Set(), and GetAll() methods on the D-Bus.
1345
"""
1346
1347
def _get_dbus_property(self, interface_name, property_name):
1348
"""Returns a bound method if one exists which is a D-Bus
1349
property with the specified name and interface.
1350
"""
1351
for cls in self.__class__.__mro__:
1352
for name, value in inspect.getmembers(
1353
cls, self._is_dbus_thing("property")):
1354
if (value._dbus_name == property_name
1355
and value._dbus_interface == interface_name):
1356
return value.__get__(self)
1357
1358
# No such property
1359
raise DBusPropertyNotFound("{}:{}.{}".format(
1360
self.dbus_object_path, interface_name, property_name))
1361
1362
@classmethod
1363
def _get_all_interface_names(cls):
1364
"""Get a sequence of all interfaces supported by an object"""
1365
return (name for name in set(getattr(getattr(x, attr),
1366
"_dbus_interface", None)
1367
for x in (inspect.getmro(cls))
1368
for attr in dir(x))
1369
if name is not None)
1370
1371
@dbus.service.method(dbus.PROPERTIES_IFACE,
1372
in_signature="ss",
1373
out_signature="v")
1374
def Get(self, interface_name, property_name):
1375
"""Standard D-Bus property Get() method, see D-Bus standard.
1376
"""
1377
prop = self._get_dbus_property(interface_name, property_name)
1378
if prop._dbus_access == "write":
1379
raise DBusPropertyAccessException(property_name)
1380
value = prop()
1381
if not hasattr(value, "variant_level"):
1382
return value
1383
return type(value)(value, variant_level=value.variant_level+1)
1384
1385
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
1386
def Set(self, interface_name, property_name, value):
1387
"""Standard D-Bus property Set() method, see D-Bus standard.
1388
"""
1389
prop = self._get_dbus_property(interface_name, property_name)
1390
if prop._dbus_access == "read":
1391
raise DBusPropertyAccessException(property_name)
1392
if prop._dbus_get_args_options["byte_arrays"]:
1393
# The byte_arrays option is not supported yet on
1394
# signatures other than "ay".
1395
if prop._dbus_signature != "ay":
1396
raise ValueError("Byte arrays not supported for non-"
1397
"'ay' signature {!r}"
1398
.format(prop._dbus_signature))
1399
value = dbus.ByteArray(b''.join(chr(byte)
1400
for byte in value))
1401
prop(value)
1402
1403
@dbus.service.method(dbus.PROPERTIES_IFACE,
1404
in_signature="s",
1405
out_signature="a{sv}")
1406
def GetAll(self, interface_name):
1407
"""Standard D-Bus property GetAll() method, see D-Bus
1408
standard.
1409
1410
Note: Will not include properties with access="write".
1411
"""
1412
properties = {}
1413
for name, prop in self._get_all_dbus_things("property"):
1414
if (interface_name
1415
and interface_name != prop._dbus_interface):
1416
# Interface non-empty but did not match
1417
continue
1418
# Ignore write-only properties
1419
if prop._dbus_access == "write":
1420
continue
1421
value = prop()
1422
if not hasattr(value, "variant_level"):
1423
properties[name] = value
1424
continue
1425
properties[name] = type(value)(
1426
value, variant_level=value.variant_level + 1)
1427
return dbus.Dictionary(properties, signature="sv")
1428
1429
@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
1430
def PropertiesChanged(self, interface_name, changed_properties,
1431
invalidated_properties):
1432
"""Standard D-Bus PropertiesChanged() signal, see D-Bus
1433
standard.
1434
"""
1435
pass
1436
1437
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1438
out_signature="s",
1439
path_keyword='object_path',
1440
connection_keyword='connection')
1441
def Introspect(self, object_path, connection):
1442
"""Overloading of standard D-Bus method.
1443
1444
Inserts property tags and interface annotation tags.
1445
"""
1446
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1447
object_path,
1448
connection)
1449
try:
1450
document = xml.dom.minidom.parseString(xmlstring)
1451
1452
def make_tag(document, name, prop):
1453
e = document.createElement("property")
1454
e.setAttribute("name", name)
1455
e.setAttribute("type", prop._dbus_signature)
1456
e.setAttribute("access", prop._dbus_access)
1457
return e
1458
1459
for if_tag in document.getElementsByTagName("interface"):
1460
# Add property tags
1461
for tag in (make_tag(document, name, prop)
1462
for name, prop
1463
in self._get_all_dbus_things("property")
1464
if prop._dbus_interface
1465
== if_tag.getAttribute("name")):
1466
if_tag.appendChild(tag)
1467
# Add annotation tags for properties
1468
for tag in if_tag.getElementsByTagName("property"):
1469
annots = dict()
1470
for name, prop in self._get_all_dbus_things(
1471
"property"):
1472
if (name == tag.getAttribute("name")
1473
and prop._dbus_interface
1474
== if_tag.getAttribute("name")):
1475
annots.update(getattr(
1476
prop, "_dbus_annotations", {}))
1477
for name, value in annots.items():
1478
ann_tag = document.createElement(
1479
"annotation")
1480
ann_tag.setAttribute("name", name)
1481
ann_tag.setAttribute("value", value)
1482
tag.appendChild(ann_tag)
1483
# Add the names to the return values for the
1484
# "org.freedesktop.DBus.Properties" methods
1485
if (if_tag.getAttribute("name")
1486
== "org.freedesktop.DBus.Properties"):
1487
for cn in if_tag.getElementsByTagName("method"):
1488
if cn.getAttribute("name") == "Get":
1489
for arg in cn.getElementsByTagName("arg"):
1490
if (arg.getAttribute("direction")
1491
== "out"):
1492
arg.setAttribute("name", "value")
1493
elif cn.getAttribute("name") == "GetAll":
1494
for arg in cn.getElementsByTagName("arg"):
1495
if (arg.getAttribute("direction")
1496
== "out"):
1497
arg.setAttribute("name", "props")
1498
xmlstring = document.toxml("utf-8")
1499
document.unlink()
1500
except (AttributeError, xml.dom.DOMException,
1501
xml.parsers.expat.ExpatError) as error:
1502
logger.error("Failed to override Introspection method",
1503
exc_info=error)
1504
return xmlstring
1505
1506
1507
try:
1508
dbus.OBJECT_MANAGER_IFACE
1509
except AttributeError:
1510
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1511
1512
1513
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1514
"""A D-Bus object with an ObjectManager.
1515
1516
Classes inheriting from this exposes the standard
1517
GetManagedObjects call and the InterfacesAdded and
1518
InterfacesRemoved signals on the standard
1519
"org.freedesktop.DBus.ObjectManager" interface.
1520
1521
Note: No signals are sent automatically; they must be sent
1522
manually.
1523
"""
1524
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1525
out_signature="a{oa{sa{sv}}}")
1526
def GetManagedObjects(self):
1527
"""This function must be overridden"""
1528
raise NotImplementedError()
1529
1530
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1531
signature="oa{sa{sv}}")
1532
def InterfacesAdded(self, object_path, interfaces_and_properties):
1533
pass
1534
1535
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1536
def InterfacesRemoved(self, object_path, interfaces):
1537
pass
1538
1539
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1540
out_signature="s",
1541
path_keyword='object_path',
1542
connection_keyword='connection')
1543
def Introspect(self, object_path, connection):
1544
"""Overloading of standard D-Bus method.
1545
1546
Override return argument name of GetManagedObjects to be
1547
"objpath_interfaces_and_properties"
1548
"""
1549
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1550
object_path,
1551
connection)
1552
try:
1553
document = xml.dom.minidom.parseString(xmlstring)
1554
1555
for if_tag in document.getElementsByTagName("interface"):
1556
# Fix argument name for the GetManagedObjects method
1557
if (if_tag.getAttribute("name")
1558
== dbus.OBJECT_MANAGER_IFACE):
1559
for cn in if_tag.getElementsByTagName("method"):
1560
if (cn.getAttribute("name")
1561
== "GetManagedObjects"):
1562
for arg in cn.getElementsByTagName("arg"):
1563
if (arg.getAttribute("direction")
1564
== "out"):
1565
arg.setAttribute(
1566
"name",
1567
"objpath_interfaces"
1568
"_and_properties")
1569
xmlstring = document.toxml("utf-8")
1570
document.unlink()
1571
except (AttributeError, xml.dom.DOMException,
1572
xml.parsers.expat.ExpatError) as error:
1573
logger.error("Failed to override Introspection method",
1574
exc_info=error)
1575
return xmlstring
1576
1577
1578
def datetime_to_dbus(dt, variant_level=0):
1579
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1580
if dt is None:
1581
return dbus.String("", variant_level=variant_level)
1582
return dbus.String(dt.isoformat(), variant_level=variant_level)
1583
1584
1585
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1586
"""A class decorator; applied to a subclass of
1587
dbus.service.Object, it will add alternate D-Bus attributes with
1588
interface names according to the "alt_interface_names" mapping.
1589
Usage:
1590
1591
@alternate_dbus_interfaces({"org.example.Interface":
1592
"net.example.AlternateInterface"})
1593
class SampleDBusObject(dbus.service.Object):
1594
@dbus.service.method("org.example.Interface")
1595
def SampleDBusMethod():
1596
pass
1597
1598
The above "SampleDBusMethod" on "SampleDBusObject" will be
1599
reachable via two interfaces: "org.example.Interface" and
1600
"net.example.AlternateInterface", the latter of which will have
1601
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1602
"true", unless "deprecate" is passed with a False value.
1603
1604
This works for methods and signals, and also for D-Bus properties
1605
(from DBusObjectWithProperties) and interfaces (from the
1606
dbus_interface_annotations decorator).
1607
"""
1608
1609
def wrapper(cls):
1610
for orig_interface_name, alt_interface_name in (
1611
alt_interface_names.items()):
1612
attr = {}
1613
interface_names = set()
1614
# Go though all attributes of the class
1615
for attrname, attribute in inspect.getmembers(cls):
1616
# Ignore non-D-Bus attributes, and D-Bus attributes
1617
# with the wrong interface name
1618
if (not hasattr(attribute, "_dbus_interface")
1619
or not attribute._dbus_interface.startswith(
1620
orig_interface_name)):
1621
continue
1622
# Create an alternate D-Bus interface name based on
1623
# the current name
1624
alt_interface = attribute._dbus_interface.replace(
1625
orig_interface_name, alt_interface_name)
1626
interface_names.add(alt_interface)
1627
# Is this a D-Bus signal?
1628
if getattr(attribute, "_dbus_is_signal", False):
1629
# Extract the original non-method undecorated
1630
# function by black magic
1631
if sys.version_info.major == 2:
1632
nonmethod_func = (dict(
1633
zip(attribute.func_code.co_freevars,
1634
attribute.__closure__))
1635
["func"].cell_contents)
1636
else:
1637
nonmethod_func = (dict(
1638
zip(attribute.__code__.co_freevars,
1639
attribute.__closure__))
1640
["func"].cell_contents)
1641
# Create a new, but exactly alike, function
1642
# object, and decorate it to be a new D-Bus signal
1643
# with the alternate D-Bus interface name
1644
new_function = copy_function(nonmethod_func)
1645
new_function = (dbus.service.signal(
1646
alt_interface,
1647
attribute._dbus_signature)(new_function))
1648
# Copy annotations, if any
1649
try:
1650
new_function._dbus_annotations = dict(
1651
attribute._dbus_annotations)
1652
except AttributeError:
1653
pass
1654
1655
# Define a creator of a function to call both the
1656
# original and alternate functions, so both the
1657
# original and alternate signals gets sent when
1658
# the function is called
1659
def fixscope(func1, func2):
1660
"""This function is a scope container to pass
1661
func1 and func2 to the "call_both" function
1662
outside of its arguments"""
1663
1664
@functools.wraps(func2)
1665
def call_both(*args, **kwargs):
1666
"""This function will emit two D-Bus
1667
signals by calling func1 and func2"""
1668
func1(*args, **kwargs)
1669
func2(*args, **kwargs)
1670
# Make wrapper function look like a D-Bus
1671
# signal
1672
for name, attr in inspect.getmembers(func2):
1673
if name.startswith("_dbus_"):
1674
setattr(call_both, name, attr)
1675
1676
return call_both
1677
# Create the "call_both" function and add it to
1678
# the class
1679
attr[attrname] = fixscope(attribute, new_function)
1680
# Is this a D-Bus method?
1681
elif getattr(attribute, "_dbus_is_method", False):
1682
# Create a new, but exactly alike, function
1683
# object. Decorate it to be a new D-Bus method
1684
# with the alternate D-Bus interface name. Add it
1685
# to the class.
1686
attr[attrname] = (
1687
dbus.service.method(
1688
alt_interface,
1689
attribute._dbus_in_signature,
1690
attribute._dbus_out_signature)
1691
(copy_function(attribute)))
1692
# Copy annotations, if any
1693
try:
1694
attr[attrname]._dbus_annotations = dict(
1695
attribute._dbus_annotations)
1696
except AttributeError:
1697
pass
1698
# Is this a D-Bus property?
1699
elif getattr(attribute, "_dbus_is_property", False):
1700
# Create a new, but exactly alike, function
1701
# object, and decorate it to be a new D-Bus
1702
# property with the alternate D-Bus interface
1703
# name. Add it to the class.
1704
attr[attrname] = (dbus_service_property(
1705
alt_interface, attribute._dbus_signature,
1706
attribute._dbus_access,
1707
attribute._dbus_get_args_options
1708
["byte_arrays"])
1709
(copy_function(attribute)))
1710
# Copy annotations, if any
1711
try:
1712
attr[attrname]._dbus_annotations = dict(
1713
attribute._dbus_annotations)
1714
except AttributeError:
1715
pass
1716
# Is this a D-Bus interface?
1717
elif getattr(attribute, "_dbus_is_interface", False):
1718
# Create a new, but exactly alike, function
1719
# object. Decorate it to be a new D-Bus interface
1720
# with the alternate D-Bus interface name. Add it
1721
# to the class.
1722
attr[attrname] = (
1723
dbus_interface_annotations(alt_interface)
1724
(copy_function(attribute)))
1725
if deprecate:
1726
# Deprecate all alternate interfaces
1727
iname = "_AlternateDBusNames_interface_annotation{}"
1728
for interface_name in interface_names:
1729
1730
@dbus_interface_annotations(interface_name)
1731
def func(self):
1732
return {"org.freedesktop.DBus.Deprecated":
1733
"true"}
1734
# Find an unused name
1735
for aname in (iname.format(i)
1736
for i in itertools.count()):
1737
if aname not in attr:
1738
attr[aname] = func
1739
break
1740
if interface_names:
1741
# Replace the class with a new subclass of it with
1742
# methods, signals, etc. as created above.
1743
if sys.version_info.major == 2:
1744
cls = type(b"{}Alternate".format(cls.__name__),
1745
(cls, ), attr)
1746
else:
1747
cls = type("{}Alternate".format(cls.__name__),
1748
(cls, ), attr)
1749
return cls
1750
1751
return wrapper
1752
1753
1754
@alternate_dbus_interfaces({"se.recompile.Mandos":
1755
"se.bsnet.fukt.Mandos"})
1756
class ClientDBus(Client, DBusObjectWithProperties):
1757
"""A Client class using D-Bus
1758
1759
Attributes:
1760
dbus_object_path: dbus.ObjectPath
1761
bus: dbus.SystemBus()
1762
"""
1763
1764
runtime_expansions = (Client.runtime_expansions
1765
+ ("dbus_object_path", ))
1766
1767
_interface = "se.recompile.Mandos.Client"
1768
1769
# dbus.service.Object doesn't use super(), so we can't either.
1770
1771
def __init__(self, bus=None, *args, **kwargs):
1772
self.bus = bus
1773
Client.__init__(self, *args, **kwargs)
1774
# Only now, when this client is initialized, can it show up on
1775
# the D-Bus
1776
client_object_name = str(self.name).translate(
1777
{ord("."): ord("_"),
1778
ord("-"): ord("_")})
1779
self.dbus_object_path = dbus.ObjectPath(
1780
"/clients/" + client_object_name)
1781
DBusObjectWithProperties.__init__(self, self.bus,
1782
self.dbus_object_path)
1783
1784
def notifychangeproperty(transform_func, dbus_name,
1785
type_func=lambda x: x,
1786
variant_level=1,
1787
invalidate_only=False,
1788
_interface=_interface):
1789
""" Modify a variable so that it's a property which announces
1790
its changes to DBus.
1791
1792
transform_fun: Function that takes a value and a variant_level
1793
and transforms it to a D-Bus type.
1794
dbus_name: D-Bus name of the variable
1795
type_func: Function that transform the value before sending it
1796
to the D-Bus. Default: no transform
1797
variant_level: D-Bus variant level. Default: 1
1798
"""
1799
attrname = "_{}".format(dbus_name)
1800
1801
def setter(self, value):
1802
if hasattr(self, "dbus_object_path"):
1803
if (not hasattr(self, attrname) or
1804
type_func(getattr(self, attrname, None))
1805
!= type_func(value)):
1806
if invalidate_only:
1807
self.PropertiesChanged(
1808
_interface, dbus.Dictionary(),
1809
dbus.Array((dbus_name, )))
1810
else:
1811
dbus_value = transform_func(
1812
type_func(value),
1813
variant_level=variant_level)
1814
self.PropertyChanged(dbus.String(dbus_name),
1815
dbus_value)
1816
self.PropertiesChanged(
1817
_interface,
1818
dbus.Dictionary({dbus.String(dbus_name):
1819
dbus_value}),
1820
dbus.Array())
1821
setattr(self, attrname, value)
1822
1823
return property(lambda self: getattr(self, attrname), setter)
1824
1825
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1826
approvals_pending = notifychangeproperty(dbus.Boolean,
1827
"ApprovalPending",
1828
type_func=bool)
1829
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1830
last_enabled = notifychangeproperty(datetime_to_dbus,
1831
"LastEnabled")
1832
checker = notifychangeproperty(
1833
dbus.Boolean, "CheckerRunning",
1834
type_func=lambda checker: checker is not None)
1835
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1836
"LastCheckedOK")
1837
last_checker_status = notifychangeproperty(dbus.Int16,
1838
"LastCheckerStatus")
1839
last_approval_request = notifychangeproperty(
1840
datetime_to_dbus, "LastApprovalRequest")
1841
approved_by_default = notifychangeproperty(dbus.Boolean,
1842
"ApprovedByDefault")
1843
approval_delay = notifychangeproperty(
1844
dbus.UInt64, "ApprovalDelay",
1845
type_func=lambda td: td.total_seconds() * 1000)
1846
approval_duration = notifychangeproperty(
1847
dbus.UInt64, "ApprovalDuration",
1848
type_func=lambda td: td.total_seconds() * 1000)
1849
host = notifychangeproperty(dbus.String, "Host")
1850
timeout = notifychangeproperty(
1851
dbus.UInt64, "Timeout",
1852
type_func=lambda td: td.total_seconds() * 1000)
1853
extended_timeout = notifychangeproperty(
1854
dbus.UInt64, "ExtendedTimeout",
1855
type_func=lambda td: td.total_seconds() * 1000)
1856
interval = notifychangeproperty(
1857
dbus.UInt64, "Interval",
1858
type_func=lambda td: td.total_seconds() * 1000)
1859
checker_command = notifychangeproperty(dbus.String, "Checker")
1860
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1861
invalidate_only=True)
1862
1863
del notifychangeproperty
1864
1865
def __del__(self, *args, **kwargs):
1866
try:
1867
self.remove_from_connection()
1868
except LookupError:
1869
pass
1870
if hasattr(DBusObjectWithProperties, "__del__"):
1871
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1872
Client.__del__(self, *args, **kwargs)
1873
1874
def checker_callback(self, source, condition,
1875
connection, command, *args, **kwargs):
1876
ret = Client.checker_callback(self, source, condition,
1877
connection, command, *args,
1878
**kwargs)
1879
exitstatus = self.last_checker_status
1880
if exitstatus >= 0:
1881
# Emit D-Bus signal
1882
self.CheckerCompleted(dbus.Int16(exitstatus),
1883
# This is specific to GNU libC
1884
dbus.Int64(exitstatus << 8),
1885
dbus.String(command))
447
1886
else:
448
return now < (self.last_checked_ok + self.timeout)
449
450
## D-Bus methods & signals
451
_interface = u"org.mandos_system.Mandos.Client"
452
453
# BumpTimeout - method
454
BumpTimeout = dbus.service.method(_interface)(bump_timeout)
455
BumpTimeout.__name__ = "BumpTimeout"
456
1887
# Emit D-Bus signal
1888
self.CheckerCompleted(dbus.Int16(-1),
1889
dbus.Int64(
1890
# This is specific to GNU libC
1891
(exitstatus << 8)
1892
| self.last_checker_signal),
1893
dbus.String(command))
1894
return ret
1895
1896
def start_checker(self, *args, **kwargs):
1897
old_checker_pid = getattr(self.checker, "pid", None)
1898
r = Client.start_checker(self, *args, **kwargs)
1899
# Only if new checker process was started
1900
if (self.checker is not None
1901
and old_checker_pid != self.checker.pid):
1902
# Emit D-Bus signal
1903
self.CheckerStarted(self.current_checker_command)
1904
return r
1905
1906
def _reset_approved(self):
1907
self.approved = None
1908
return False
1909
1910
def approve(self, value=True):
1911
self.approved = value
1912
GLib.timeout_add(int(self.approval_duration.total_seconds()
1913
* 1000), self._reset_approved)
1914
self.send_changedstate()
1915
1916
# D-Bus methods, signals & properties
1917
1918
# Interfaces
1919
1920
# Signals
1921
457
1922
# CheckerCompleted - signal
458
@dbus.service.signal(_interface, signature="bqs")
459
def CheckerCompleted(self, success, condition, command):
1923
@dbus.service.signal(_interface, signature="nxs")
1924
def CheckerCompleted(self, exitcode, waitstatus, command):
460
1925
"D-Bus signal"
461
1926
pass
462
1927
463
1928
# CheckerStarted - signal
464
1929
@dbus.service.signal(_interface, signature="s")
465
1930
def CheckerStarted(self, command):
466
1931
"D-Bus signal"
467
1932
pass
468
469
# GetAllProperties - method
470
@dbus.service.method(_interface, out_signature="a{sv}")
471
def GetAllProperties(self):
472
"D-Bus method"
473
return dbus.Dictionary({
474
dbus.String("name"):
475
dbus.String(self.name, variant_level=1),
476
dbus.String("fingerprint"):
477
dbus.String(self.fingerprint, variant_level=1),
478
dbus.String("host"):
479
dbus.String(self.host, variant_level=1),
480
dbus.String("created"):
481
_datetime_to_dbus(self.created, variant_level=1),
482
dbus.String("last_enabled"):
483
(_datetime_to_dbus(self.last_enabled,
484
variant_level=1)
485
if self.last_enabled is not None
486
else dbus.Boolean(False, variant_level=1)),
487
dbus.String("enabled"):
488
dbus.Boolean(self.enabled, variant_level=1),
489
dbus.String("last_checked_ok"):
490
(_datetime_to_dbus(self.last_checked_ok,
491
variant_level=1)
492
if self.last_checked_ok is not None
493
else dbus.Boolean (False, variant_level=1)),
494
dbus.String("timeout"):
495
dbus.UInt64(self.timeout_milliseconds(),
496
variant_level=1),
497
dbus.String("interval"):
498
dbus.UInt64(self.interval_milliseconds(),
499
variant_level=1),
500
dbus.String("checker"):
501
dbus.String(self.checker_command,
502
variant_level=1),
503
dbus.String("checker_running"):
504
dbus.Boolean(self.checker is not None,
505
variant_level=1),
506
}, signature="sv")
507
508
# IsStillValid - method
509
IsStillValid = (dbus.service.method(_interface, out_signature="b")
510
(still_valid))
511
IsStillValid.__name__ = "IsStillValid"
512
1933
513
1934
# PropertyChanged - signal
1935
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
514
1936
@dbus.service.signal(_interface, signature="sv")
515
1937
def PropertyChanged(self, property, value):
516
1938
"D-Bus signal"
517
1939
pass
518
519
# SetChecker - method
520
@dbus.service.method(_interface, in_signature="s")
521
def SetChecker(self, checker):
522
"D-Bus setter method"
523
self.checker_command = checker
524
# Emit D-Bus signal
525
self.PropertyChanged(dbus.String(u"checker"),
526
dbus.String(self.checker_command,
527
variant_level=1))
528
529
# SetHost - method
530
@dbus.service.method(_interface, in_signature="s")
531
def SetHost(self, host):
532
"D-Bus setter method"
533
self.host = host
534
# Emit D-Bus signal
535
self.PropertyChanged(dbus.String(u"host"),
536
dbus.String(self.host, variant_level=1))
537
538
# SetInterval - method
539
@dbus.service.method(_interface, in_signature="t")
540
def SetInterval(self, milliseconds):
541
self.interval = datetime.timedelta(0, 0, 0, milliseconds)
542
# Emit D-Bus signal
543
self.PropertyChanged(dbus.String(u"interval"),
544
(dbus.UInt64(self.interval_milliseconds(),
545
variant_level=1)))
546
547
# SetSecret - method
548
@dbus.service.method(_interface, in_signature="ay",
549
byte_arrays=True)
550
def SetSecret(self, secret):
551
"D-Bus setter method"
552
self.secret = str(secret)
553
554
# SetTimeout - method
555
@dbus.service.method(_interface, in_signature="t")
556
def SetTimeout(self, milliseconds):
557
self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
558
# Emit D-Bus signal
559
self.PropertyChanged(dbus.String(u"timeout"),
560
(dbus.UInt64(self.timeout_milliseconds(),
561
variant_level=1)))
562
1940
1941
# GotSecret - signal
1942
@dbus.service.signal(_interface)
1943
def GotSecret(self):
1944
"""D-Bus signal
1945
Is sent after a successful transfer of secret from the Mandos
1946
server to mandos-client
1947
"""
1948
pass
1949
1950
# Rejected - signal
1951
@dbus.service.signal(_interface, signature="s")
1952
def Rejected(self, reason):
1953
"D-Bus signal"
1954
pass
1955
1956
# NeedApproval - signal
1957
@dbus.service.signal(_interface, signature="tb")
1958
def NeedApproval(self, timeout, default):
1959
"D-Bus signal"
1960
return self.need_approval()
1961
1962
# Methods
1963
1964
# Approve - method
1965
@dbus.service.method(_interface, in_signature="b")
1966
def Approve(self, value):
1967
self.approve(value)
1968
1969
# CheckedOK - method
1970
@dbus.service.method(_interface)
1971
def CheckedOK(self):
1972
self.checked_ok()
1973
563
1974
# Enable - method
564
Enable = dbus.service.method(_interface)(enable)
565
Enable.__name__ = "Enable"
566
1975
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1976
@dbus.service.method(_interface)
1977
def Enable(self):
1978
"D-Bus method"
1979
self.enable()
1980
567
1981
# StartChecker - method
1982
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
568
1983
@dbus.service.method(_interface)
569
1984
def StartChecker(self):
570
1985
"D-Bus method"
571
1986
self.start_checker()
572
1987
573
1988
# Disable - method
1989
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
574
1990
@dbus.service.method(_interface)
575
1991
def Disable(self):
576
1992
"D-Bus method"
577
1993
self.disable()
578
1994
579
1995
# StopChecker - method
580
StopChecker = dbus.service.method(_interface)(stop_checker)
581
StopChecker.__name__ = "StopChecker"
582
1996
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1997
@dbus.service.method(_interface)
1998
def StopChecker(self):
1999
self.stop_checker()
2000
2001
# Properties
2002
2003
# ApprovalPending - property
2004
@dbus_service_property(_interface, signature="b", access="read")
2005
def ApprovalPending_dbus_property(self):
2006
return dbus.Boolean(bool(self.approvals_pending))
2007
2008
# ApprovedByDefault - property
2009
@dbus_service_property(_interface,
2010
signature="b",
2011
access="readwrite")
2012
def ApprovedByDefault_dbus_property(self, value=None):
2013
if value is None: # get
2014
return dbus.Boolean(self.approved_by_default)
2015
self.approved_by_default = bool(value)
2016
2017
# ApprovalDelay - property
2018
@dbus_service_property(_interface,
2019
signature="t",
2020
access="readwrite")
2021
def ApprovalDelay_dbus_property(self, value=None):
2022
if value is None: # get
2023
return dbus.UInt64(self.approval_delay.total_seconds()
2024
* 1000)
2025
self.approval_delay = datetime.timedelta(0, 0, 0, value)
2026
2027
# ApprovalDuration - property
2028
@dbus_service_property(_interface,
2029
signature="t",
2030
access="readwrite")
2031
def ApprovalDuration_dbus_property(self, value=None):
2032
if value is None: # get
2033
return dbus.UInt64(self.approval_duration.total_seconds()
2034
* 1000)
2035
self.approval_duration = datetime.timedelta(0, 0, 0, value)
2036
2037
# Name - property
2038
@dbus_annotations(
2039
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2040
@dbus_service_property(_interface, signature="s", access="read")
2041
def Name_dbus_property(self):
2042
return dbus.String(self.name)
2043
2044
# KeyID - property
2045
@dbus_annotations(
2046
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2047
@dbus_service_property(_interface, signature="s", access="read")
2048
def KeyID_dbus_property(self):
2049
return dbus.String(self.key_id)
2050
2051
# Fingerprint - property
2052
@dbus_annotations(
2053
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2054
@dbus_service_property(_interface, signature="s", access="read")
2055
def Fingerprint_dbus_property(self):
2056
return dbus.String(self.fingerprint)
2057
2058
# Host - property
2059
@dbus_service_property(_interface,
2060
signature="s",
2061
access="readwrite")
2062
def Host_dbus_property(self, value=None):
2063
if value is None: # get
2064
return dbus.String(self.host)
2065
self.host = str(value)
2066
2067
# Created - property
2068
@dbus_annotations(
2069
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2070
@dbus_service_property(_interface, signature="s", access="read")
2071
def Created_dbus_property(self):
2072
return datetime_to_dbus(self.created)
2073
2074
# LastEnabled - property
2075
@dbus_service_property(_interface, signature="s", access="read")
2076
def LastEnabled_dbus_property(self):
2077
return datetime_to_dbus(self.last_enabled)
2078
2079
# Enabled - property
2080
@dbus_service_property(_interface,
2081
signature="b",
2082
access="readwrite")
2083
def Enabled_dbus_property(self, value=None):
2084
if value is None: # get
2085
return dbus.Boolean(self.enabled)
2086
if value:
2087
self.enable()
2088
else:
2089
self.disable()
2090
2091
# LastCheckedOK - property
2092
@dbus_service_property(_interface,
2093
signature="s",
2094
access="readwrite")
2095
def LastCheckedOK_dbus_property(self, value=None):
2096
if value is not None:
2097
self.checked_ok()
2098
return
2099
return datetime_to_dbus(self.last_checked_ok)
2100
2101
# LastCheckerStatus - property
2102
@dbus_service_property(_interface, signature="n", access="read")
2103
def LastCheckerStatus_dbus_property(self):
2104
return dbus.Int16(self.last_checker_status)
2105
2106
# Expires - property
2107
@dbus_service_property(_interface, signature="s", access="read")
2108
def Expires_dbus_property(self):
2109
return datetime_to_dbus(self.expires)
2110
2111
# LastApprovalRequest - property
2112
@dbus_service_property(_interface, signature="s", access="read")
2113
def LastApprovalRequest_dbus_property(self):
2114
return datetime_to_dbus(self.last_approval_request)
2115
2116
# Timeout - property
2117
@dbus_service_property(_interface,
2118
signature="t",
2119
access="readwrite")
2120
def Timeout_dbus_property(self, value=None):
2121
if value is None: # get
2122
return dbus.UInt64(self.timeout.total_seconds() * 1000)
2123
old_timeout = self.timeout
2124
self.timeout = datetime.timedelta(0, 0, 0, value)
2125
# Reschedule disabling
2126
if self.enabled:
2127
now = datetime.datetime.utcnow()
2128
self.expires += self.timeout - old_timeout
2129
if self.expires <= now:
2130
# The timeout has passed
2131
self.disable()
2132
else:
2133
if (getattr(self, "disable_initiator_tag", None)
2134
is None):
2135
return
2136
GLib.source_remove(self.disable_initiator_tag)
2137
self.disable_initiator_tag = GLib.timeout_add(
2138
int((self.expires - now).total_seconds() * 1000),
2139
self.disable)
2140
2141
# ExtendedTimeout - property
2142
@dbus_service_property(_interface,
2143
signature="t",
2144
access="readwrite")
2145
def ExtendedTimeout_dbus_property(self, value=None):
2146
if value is None: # get
2147
return dbus.UInt64(self.extended_timeout.total_seconds()
2148
* 1000)
2149
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
2150
2151
# Interval - property
2152
@dbus_service_property(_interface,
2153
signature="t",
2154
access="readwrite")
2155
def Interval_dbus_property(self, value=None):
2156
if value is None: # get
2157
return dbus.UInt64(self.interval.total_seconds() * 1000)
2158
self.interval = datetime.timedelta(0, 0, 0, value)
2159
if getattr(self, "checker_initiator_tag", None) is None:
2160
return
2161
if self.enabled:
2162
# Reschedule checker run
2163
GLib.source_remove(self.checker_initiator_tag)
2164
self.checker_initiator_tag = GLib.timeout_add(
2165
value, self.start_checker)
2166
self.start_checker() # Start one now, too
2167
2168
# Checker - property
2169
@dbus_service_property(_interface,
2170
signature="s",
2171
access="readwrite")
2172
def Checker_dbus_property(self, value=None):
2173
if value is None: # get
2174
return dbus.String(self.checker_command)
2175
self.checker_command = str(value)
2176
2177
# CheckerRunning - property
2178
@dbus_service_property(_interface,
2179
signature="b",
2180
access="readwrite")
2181
def CheckerRunning_dbus_property(self, value=None):
2182
if value is None: # get
2183
return dbus.Boolean(self.checker is not None)
2184
if value:
2185
self.start_checker()
2186
else:
2187
self.stop_checker()
2188
2189
# ObjectPath - property
2190
@dbus_annotations(
2191
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
2192
"org.freedesktop.DBus.Deprecated": "true"})
2193
@dbus_service_property(_interface, signature="o", access="read")
2194
def ObjectPath_dbus_property(self):
2195
return self.dbus_object_path # is already a dbus.ObjectPath
2196
2197
# Secret = property
2198
@dbus_annotations(
2199
{"org.freedesktop.DBus.Property.EmitsChangedSignal":
2200
"invalidates"})
2201
@dbus_service_property(_interface,
2202
signature="ay",
2203
access="write",
2204
byte_arrays=True)
2205
def Secret_dbus_property(self, value):
2206
self.secret = bytes(value)
2207
583
2208
del _interface
584
2209
585
2210
586
def peer_certificate(session):
587
"Return the peer's OpenPGP certificate as a bytestring"
588
# If not an OpenPGP certificate...
589
if (gnutls.library.functions
590
.gnutls_certificate_type_get(session._c_object)
591
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
592
# ...do the normal thing
593
return session.peer_certificate
594
list_size = ctypes.c_uint()
595
cert_list = (gnutls.library.functions
596
.gnutls_certificate_get_peers
597
(session._c_object, ctypes.byref(list_size)))
598
if list_size.value == 0:
599
return None
600
cert = cert_list[0]
601
return ctypes.string_at(cert.data, cert.size)
602
603
604
def fingerprint(openpgp):
605
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
606
# New GnuTLS "datum" with the OpenPGP public key
607
datum = (gnutls.library.types
608
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
609
ctypes.POINTER
610
(ctypes.c_ubyte)),
611
ctypes.c_uint(len(openpgp))))
612
# New empty GnuTLS certificate
613
crt = gnutls.library.types.gnutls_openpgp_crt_t()
614
(gnutls.library.functions
615
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
616
# Import the OpenPGP public key into the certificate
617
(gnutls.library.functions
618
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
619
gnutls.library.constants
620
.GNUTLS_OPENPGP_FMT_RAW))
621
# Verify the self signature in the key
622
crtverify = ctypes.c_uint()
623
(gnutls.library.functions
624
.gnutls_openpgp_crt_verify_self(crt, 0, ctypes.byref(crtverify)))
625
if crtverify.value != 0:
626
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
627
raise gnutls.errors.CertificateSecurityError("Verify failed")
628
# New buffer for the fingerprint
629
buf = ctypes.create_string_buffer(20)
630
buf_len = ctypes.c_size_t()
631
# Get the fingerprint from the certificate into the buffer
632
(gnutls.library.functions
633
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
634
ctypes.byref(buf_len)))
635
# Deinit the certificate
636
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
637
# Convert the buffer to a Python bytestring
638
fpr = ctypes.string_at(buf, buf_len.value)
639
# Convert the bytestring to hexadecimal notation
640
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
641
return hex_fpr
642
643
644
class TCP_handler(SocketServer.BaseRequestHandler, object):
645
"""A TCP request handler class.
646
Instantiated by IPv6_TCPServer for each request to handle it.
2211
class ProxyClient(object):
2212
def __init__(self, child_pipe, key_id, fpr, address):
2213
self._pipe = child_pipe
2214
self._pipe.send(('init', key_id, fpr, address))
2215
if not self._pipe.recv():
2216
raise KeyError(key_id or fpr)
2217
2218
def __getattribute__(self, name):
2219
if name == '_pipe':
2220
return super(ProxyClient, self).__getattribute__(name)
2221
self._pipe.send(('getattr', name))
2222
data = self._pipe.recv()
2223
if data[0] == 'data':
2224
return data[1]
2225
if data[0] == 'function':
2226
2227
def func(*args, **kwargs):
2228
self._pipe.send(('funcall', name, args, kwargs))
2229
return self._pipe.recv()[1]
2230
2231
return func
2232
2233
def __setattr__(self, name, value):
2234
if name == '_pipe':
2235
return super(ProxyClient, self).__setattr__(name, value)
2236
self._pipe.send(('setattr', name, value))
2237
2238
2239
class ClientHandler(socketserver.BaseRequestHandler, object):
2240
"""A class to handle client connections.
2241
2242
Instantiated once for each connection to handle it.
647
2243
Note: This will run in its own forked process."""
648
2244
649
2245
def handle(self):
650
logger.info(u"TCP connection from: %s",
651
unicode(self.client_address))
652
session = (gnutls.connection
653
.ClientSession(self.request,
654
gnutls.connection
655
.X509Credentials()))
656
657
line = self.request.makefile().readline()
658
logger.debug(u"Protocol version: %r", line)
659
try:
660
if int(line.strip().split()[0]) > 1:
661
raise RuntimeError
662
except (ValueError, IndexError, RuntimeError), error:
663
logger.error(u"Unknown protocol version: %s", error)
664
return
665
666
# Note: gnutls.connection.X509Credentials is really a generic
667
# GnuTLS certificate credentials object so long as no X.509
668
# keys are added to it. Therefore, we can use it here despite
669
# using OpenPGP certificates.
670
671
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
672
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
673
# "+DHE-DSS"))
674
# Use a fallback default, since this MUST be set.
675
priority = self.server.settings.get("priority", "NORMAL")
676
(gnutls.library.functions
677
.gnutls_priority_set_direct(session._c_object,
678
priority, None))
679
680
try:
681
session.handshake()
682
except gnutls.errors.GNUTLSError, error:
683
logger.warning(u"Handshake failed: %s", error)
684
# Do not run session.bye() here: the session is not
685
# established. Just abandon the request.
686
return
687
try:
688
fpr = fingerprint(peer_certificate(session))
689
except (TypeError, gnutls.errors.GNUTLSError), error:
690
logger.warning(u"Bad certificate: %s", error)
691
session.bye()
692
return
693
logger.debug(u"Fingerprint: %s", fpr)
694
for c in self.server.clients:
695
if c.fingerprint == fpr:
696
client = c
697
break
2246
with contextlib.closing(self.server.child_pipe) as child_pipe:
2247
logger.info("TCP connection from: %s",
2248
str(self.client_address))
2249
logger.debug("Pipe FD: %d",
2250
self.server.child_pipe.fileno())
2251
2252
session = gnutls.ClientSession(self.request)
2253
2254
# priority = ':'.join(("NONE", "+VERS-TLS1.1",
2255
# "+AES-256-CBC", "+SHA1",
2256
# "+COMP-NULL", "+CTYPE-OPENPGP",
2257
# "+DHE-DSS"))
2258
# Use a fallback default, since this MUST be set.
2259
priority = self.server.gnutls_priority
2260
if priority is None:
2261
priority = "NORMAL"
2262
gnutls.priority_set_direct(session._c_object,
2263
priority.encode("utf-8"),
2264
None)
2265
2266
# Start communication using the Mandos protocol
2267
# Get protocol number
2268
line = self.request.makefile().readline()
2269
logger.debug("Protocol version: %r", line)
2270
try:
2271
if int(line.strip().split()[0]) > 1:
2272
raise RuntimeError(line)
2273
except (ValueError, IndexError, RuntimeError) as error:
2274
logger.error("Unknown protocol version: %s", error)
2275
return
2276
2277
# Start GnuTLS connection
2278
try:
2279
session.handshake()
2280
except gnutls.Error as error:
2281
logger.warning("Handshake failed: %s", error)
2282
# Do not run session.bye() here: the session is not
2283
# established. Just abandon the request.
2284
return
2285
logger.debug("Handshake succeeded")
2286
2287
approval_required = False
2288
try:
2289
if gnutls.has_rawpk:
2290
fpr = ""
2291
try:
2292
key_id = self.key_id(
2293
self.peer_certificate(session))
2294
except (TypeError, gnutls.Error) as error:
2295
logger.warning("Bad certificate: %s", error)
2296
return
2297
logger.debug("Key ID: %s", key_id)
2298
2299
else:
2300
key_id = ""
2301
try:
2302
fpr = self.fingerprint(
2303
self.peer_certificate(session))
2304
except (TypeError, gnutls.Error) as error:
2305
logger.warning("Bad certificate: %s", error)
2306
return
2307
logger.debug("Fingerprint: %s", fpr)
2308
2309
try:
2310
client = ProxyClient(child_pipe, key_id, fpr,
2311
self.client_address)
2312
except KeyError:
2313
return
2314
2315
if client.approval_delay:
2316
delay = client.approval_delay
2317
client.approvals_pending += 1
2318
approval_required = True
2319
2320
while True:
2321
if not client.enabled:
2322
logger.info("Client %s is disabled",
2323
client.name)
2324
if self.server.use_dbus:
2325
# Emit D-Bus signal
2326
client.Rejected("Disabled")
2327
return
2328
2329
if client.approved or not client.approval_delay:
2330
# We are approved or approval is disabled
2331
break
2332
elif client.approved is None:
2333
logger.info("Client %s needs approval",
2334
client.name)
2335
if self.server.use_dbus:
2336
# Emit D-Bus signal
2337
client.NeedApproval(
2338
client.approval_delay.total_seconds()
2339
* 1000, client.approved_by_default)
2340
else:
2341
logger.warning("Client %s was not approved",
2342
client.name)
2343
if self.server.use_dbus:
2344
# Emit D-Bus signal
2345
client.Rejected("Denied")
2346
return
2347
2348
# wait until timeout or approved
2349
time = datetime.datetime.now()
2350
client.changedstate.acquire()
2351
client.changedstate.wait(delay.total_seconds())
2352
client.changedstate.release()
2353
time2 = datetime.datetime.now()
2354
if (time2 - time) >= delay:
2355
if not client.approved_by_default:
2356
logger.warning("Client %s timed out while"
2357
" waiting for approval",
2358
client.name)
2359
if self.server.use_dbus:
2360
# Emit D-Bus signal
2361
client.Rejected("Approval timed out")
2362
return
2363
else:
2364
break
2365
else:
2366
delay -= time2 - time
2367
2368
try:
2369
session.send(client.secret)
2370
except gnutls.Error as error:
2371
logger.warning("gnutls send failed",
2372
exc_info=error)
2373
return
2374
2375
logger.info("Sending secret to %s", client.name)
2376
# bump the timeout using extended_timeout
2377
client.bump_timeout(client.extended_timeout)
2378
if self.server.use_dbus:
2379
# Emit D-Bus signal
2380
client.GotSecret()
2381
2382
finally:
2383
if approval_required:
2384
client.approvals_pending -= 1
2385
try:
2386
session.bye()
2387
except gnutls.Error as error:
2388
logger.warning("GnuTLS bye failed",
2389
exc_info=error)
2390
2391
@staticmethod
2392
def peer_certificate(session):
2393
"Return the peer's certificate as a bytestring"
2394
try:
2395
cert_type = gnutls.certificate_type_get2(session._c_object,
2396
gnutls.CTYPE_PEERS)
2397
except AttributeError:
2398
cert_type = gnutls.certificate_type_get(session._c_object)
2399
if gnutls.has_rawpk:
2400
valid_cert_types = frozenset((gnutls.CRT_RAWPK,))
698
2401
else:
699
logger.warning(u"Client not found for fingerprint: %s",
700
fpr)
701
session.bye()
702
return
703
# Have to check if client.still_valid(), since it is possible
704
# that the client timed out while establishing the GnuTLS
705
# session.
706
if not client.still_valid():
707
logger.warning(u"Client %(name)s is invalid",
708
vars(client))
709
session.bye()
710
return
711
## This won't work here, since we're in a fork.
712
# client.bump_timeout()
713
sent_size = 0
714
while sent_size < len(client.secret):
715
sent = session.send(client.secret[sent_size:])
716
logger.debug(u"Sent: %d, remaining: %d",
717
sent, len(client.secret)
718
- (sent_size + sent))
719
sent_size += sent
720
session.bye()
721
722
723
class IPv6_TCPServer(SocketServer.ForkingMixIn,
724
SocketServer.TCPServer, object):
725
"""IPv6 TCP server. Accepts 'None' as address and/or port.
2402
valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))
2403
# If not a valid certificate type...
2404
if cert_type not in valid_cert_types:
2405
logger.info("Cert type %r not in %r", cert_type,
2406
valid_cert_types)
2407
# ...return invalid data
2408
return b""
2409
list_size = ctypes.c_uint(1)
2410
cert_list = (gnutls.certificate_get_peers
2411
(session._c_object, ctypes.byref(list_size)))
2412
if not bool(cert_list) and list_size.value != 0:
2413
raise gnutls.Error("error getting peer certificate")
2414
if list_size.value == 0:
2415
return None
2416
cert = cert_list[0]
2417
return ctypes.string_at(cert.data, cert.size)
2418
2419
@staticmethod
2420
def key_id(certificate):
2421
"Convert a certificate bytestring to a hexdigit key ID"
2422
# New GnuTLS "datum" with the public key
2423
datum = gnutls.datum_t(
2424
ctypes.cast(ctypes.c_char_p(certificate),
2425
ctypes.POINTER(ctypes.c_ubyte)),
2426
ctypes.c_uint(len(certificate)))
2427
# XXX all these need to be created in the gnutls "module"
2428
# New empty GnuTLS certificate
2429
pubkey = gnutls.pubkey_t()
2430
gnutls.pubkey_init(ctypes.byref(pubkey))
2431
# Import the raw public key into the certificate
2432
gnutls.pubkey_import(pubkey,
2433
ctypes.byref(datum),
2434
gnutls.X509_FMT_DER)
2435
# New buffer for the key ID
2436
buf = ctypes.create_string_buffer(32)
2437
buf_len = ctypes.c_size_t(len(buf))
2438
# Get the key ID from the raw public key into the buffer
2439
gnutls.pubkey_get_key_id(pubkey,
2440
gnutls.KEYID_USE_SHA256,
2441
ctypes.cast(ctypes.byref(buf),
2442
ctypes.POINTER(ctypes.c_ubyte)),
2443
ctypes.byref(buf_len))
2444
# Deinit the certificate
2445
gnutls.pubkey_deinit(pubkey)
2446
2447
# Convert the buffer to a Python bytestring
2448
key_id = ctypes.string_at(buf, buf_len.value)
2449
# Convert the bytestring to hexadecimal notation
2450
hex_key_id = binascii.hexlify(key_id).upper()
2451
return hex_key_id
2452
2453
@staticmethod
2454
def fingerprint(openpgp):
2455
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
2456
# New GnuTLS "datum" with the OpenPGP public key
2457
datum = gnutls.datum_t(
2458
ctypes.cast(ctypes.c_char_p(openpgp),
2459
ctypes.POINTER(ctypes.c_ubyte)),
2460
ctypes.c_uint(len(openpgp)))
2461
# New empty GnuTLS certificate
2462
crt = gnutls.openpgp_crt_t()
2463
gnutls.openpgp_crt_init(ctypes.byref(crt))
2464
# Import the OpenPGP public key into the certificate
2465
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2466
gnutls.OPENPGP_FMT_RAW)
2467
# Verify the self signature in the key
2468
crtverify = ctypes.c_uint()
2469
gnutls.openpgp_crt_verify_self(crt, 0,
2470
ctypes.byref(crtverify))
2471
if crtverify.value != 0:
2472
gnutls.openpgp_crt_deinit(crt)
2473
raise gnutls.CertificateSecurityError(code
2474
=crtverify.value)
2475
# New buffer for the fingerprint
2476
buf = ctypes.create_string_buffer(20)
2477
buf_len = ctypes.c_size_t()
2478
# Get the fingerprint from the certificate into the buffer
2479
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2480
ctypes.byref(buf_len))
2481
# Deinit the certificate
2482
gnutls.openpgp_crt_deinit(crt)
2483
# Convert the buffer to a Python bytestring
2484
fpr = ctypes.string_at(buf, buf_len.value)
2485
# Convert the bytestring to hexadecimal notation
2486
hex_fpr = binascii.hexlify(fpr).upper()
2487
return hex_fpr
2488
2489
2490
class MultiprocessingMixIn(object):
2491
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2492
2493
def sub_process_main(self, request, address):
2494
try:
2495
self.finish_request(request, address)
2496
except Exception:
2497
self.handle_error(request, address)
2498
self.close_request(request)
2499
2500
def process_request(self, request, address):
2501
"""Start a new process to process the request."""
2502
proc = multiprocessing.Process(target=self.sub_process_main,
2503
args=(request, address))
2504
proc.start()
2505
return proc
2506
2507
2508
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
2509
""" adds a pipe to the MixIn """
2510
2511
def process_request(self, request, client_address):
2512
"""Overrides and wraps the original process_request().
2513
2514
This function creates a new pipe in self.pipe
2515
"""
2516
parent_pipe, self.child_pipe = multiprocessing.Pipe()
2517
2518
proc = MultiprocessingMixIn.process_request(self, request,
2519
client_address)
2520
self.child_pipe.close()
2521
self.add_pipe(parent_pipe, proc)
2522
2523
def add_pipe(self, parent_pipe, proc):
2524
"""Dummy function; override as necessary"""
2525
raise NotImplementedError()
2526
2527
2528
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
2529
socketserver.TCPServer, object):
2530
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
2531
726
2532
Attributes:
727
settings: Server settings
728
clients: Set() of Client objects
729
2533
enabled: Boolean; whether this server is activated yet
2534
interface: None or a network interface name (string)
2535
use_ipv6: Boolean; to use IPv6 or not
730
2536
"""
731
address_family = socket.AF_INET6
732
def __init__(self, *args, **kwargs):
733
if "settings" in kwargs:
734
self.settings = kwargs["settings"]
735
del kwargs["settings"]
736
if "clients" in kwargs:
737
self.clients = kwargs["clients"]
738
del kwargs["clients"]
739
self.enabled = False
740
super(IPv6_TCPServer, self).__init__(*args, **kwargs)
2537
2538
def __init__(self, server_address, RequestHandlerClass,
2539
interface=None,
2540
use_ipv6=True,
2541
socketfd=None):
2542
"""If socketfd is set, use that file descriptor instead of
2543
creating a new one with socket.socket().
2544
"""
2545
self.interface = interface
2546
if use_ipv6:
2547
self.address_family = socket.AF_INET6
2548
if socketfd is not None:
2549
# Save the file descriptor
2550
self.socketfd = socketfd
2551
# Save the original socket.socket() function
2552
self.socket_socket = socket.socket
2553
2554
# To implement --socket, we monkey patch socket.socket.
2555
#
2556
# (When socketserver.TCPServer is a new-style class, we
2557
# could make self.socket into a property instead of monkey
2558
# patching socket.socket.)
2559
#
2560
# Create a one-time-only replacement for socket.socket()
2561
@functools.wraps(socket.socket)
2562
def socket_wrapper(*args, **kwargs):
2563
# Restore original function so subsequent calls are
2564
# not affected.
2565
socket.socket = self.socket_socket
2566
del self.socket_socket
2567
# This time only, return a new socket object from the
2568
# saved file descriptor.
2569
return socket.fromfd(self.socketfd, *args, **kwargs)
2570
# Replace socket.socket() function with wrapper
2571
socket.socket = socket_wrapper
2572
# The socketserver.TCPServer.__init__ will call
2573
# socket.socket(), which might be our replacement,
2574
# socket_wrapper(), if socketfd was set.
2575
socketserver.TCPServer.__init__(self, server_address,
2576
RequestHandlerClass)
2577
741
2578
def server_bind(self):
742
2579
"""This overrides the normal server_bind() function
743
2580
to bind to an interface if one was specified, and also NOT to
744
2581
bind to an address or port if they were not specified."""
745
if self.settings["interface"]:
746
# 25 is from /usr/include/asm-i486/socket.h
747
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
2582
global SO_BINDTODEVICE
2583
if self.interface is not None:
2584
if SO_BINDTODEVICE is None:
2585
# Fall back to a hard-coded value which seems to be
2586
# common enough.
2587
logger.warning("SO_BINDTODEVICE not found, trying 25")
2588
SO_BINDTODEVICE = 25
748
2589
try:
749
self.socket.setsockopt(socket.SOL_SOCKET,
750
SO_BINDTODEVICE,
751
self.settings["interface"])
752
except socket.error, error:
753
if error[0] == errno.EPERM:
754
logger.error(u"No permission to"
755
u" bind to interface %s",
756
self.settings["interface"])
2590
self.socket.setsockopt(
2591
socket.SOL_SOCKET, SO_BINDTODEVICE,
2592
(self.interface + "\0").encode("utf-8"))
2593
except socket.error as error:
2594
if error.errno == errno.EPERM:
2595
logger.error("No permission to bind to"
2596
" interface %s", self.interface)
2597
elif error.errno == errno.ENOPROTOOPT:
2598
logger.error("SO_BINDTODEVICE not available;"
2599
" cannot bind to interface %s",
2600
self.interface)
2601
elif error.errno == errno.ENODEV:
2602
logger.error("Interface %s does not exist,"
2603
" cannot bind", self.interface)
757
2604
else:
758
raise error
2605
raise
759
2606
# Only bind(2) the socket if we really need to.
760
2607
if self.server_address[0] or self.server_address[1]:
761
2608
if not self.server_address[0]:
762
in6addr_any = "::"
763
self.server_address = (in6addr_any,
2609
if self.address_family == socket.AF_INET6:
2610
any_address = "::" # in6addr_any
2611
else:
2612
any_address = "0.0.0.0" # INADDR_ANY
2613
self.server_address = (any_address,
764
2614
self.server_address[1])
765
2615
elif not self.server_address[1]:
766
self.server_address = (self.server_address[0],
767
0)
768
# if self.settings["interface"]:
2616
self.server_address = (self.server_address[0], 0)
2617
# if self.interface:
769
2618
# self.server_address = (self.server_address[0],
770
2619
# 0, # port
771
2620
# 0, # flowinfo
772
2621
# if_nametoindex
773
# (self.settings
774
# ["interface"]))
775
return super(IPv6_TCPServer, self).server_bind()
2622
# (self.interface))
2623
return socketserver.TCPServer.server_bind(self)
2624
2625
2626
class MandosServer(IPv6_TCPServer):
2627
"""Mandos server.
2628
2629
Attributes:
2630
clients: set of Client objects
2631
gnutls_priority GnuTLS priority string
2632
use_dbus: Boolean; to emit D-Bus signals or not
2633
2634
Assumes a GLib.MainLoop event loop.
2635
"""
2636
2637
def __init__(self, server_address, RequestHandlerClass,
2638
interface=None,
2639
use_ipv6=True,
2640
clients=None,
2641
gnutls_priority=None,
2642
use_dbus=True,
2643
socketfd=None):
2644
self.enabled = False
2645
self.clients = clients
2646
if self.clients is None:
2647
self.clients = {}
2648
self.use_dbus = use_dbus
2649
self.gnutls_priority = gnutls_priority
2650
IPv6_TCPServer.__init__(self, server_address,
2651
RequestHandlerClass,
2652
interface=interface,
2653
use_ipv6=use_ipv6,
2654
socketfd=socketfd)
2655
776
2656
def server_activate(self):
777
2657
if self.enabled:
778
return super(IPv6_TCPServer, self).server_activate()
2658
return socketserver.TCPServer.server_activate(self)
2659
779
2660
def enable(self):
780
2661
self.enabled = True
781
2662
2663
def add_pipe(self, parent_pipe, proc):
2664
# Call "handle_ipc" for both data and EOF events
2665
GLib.io_add_watch(
2666
parent_pipe.fileno(),
2667
GLib.IO_IN | GLib.IO_HUP,
2668
functools.partial(self.handle_ipc,
2669
parent_pipe=parent_pipe,
2670
proc=proc))
2671
2672
def handle_ipc(self, source, condition,
2673
parent_pipe=None,
2674
proc=None,
2675
client_object=None):
2676
# error, or the other end of multiprocessing.Pipe has closed
2677
if condition & (GLib.IO_ERR | GLib.IO_HUP):
2678
# Wait for other process to exit
2679
proc.join()
2680
return False
2681
2682
# Read a request from the child
2683
request = parent_pipe.recv()
2684
command = request[0]
2685
2686
if command == 'init':
2687
key_id = request[1].decode("ascii")
2688
fpr = request[2].decode("ascii")
2689
address = request[3]
2690
2691
for c in self.clients.values():
2692
if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":
2693
continue
2694
if key_id and c.key_id == key_id:
2695
client = c
2696
break
2697
if fpr and c.fingerprint == fpr:
2698
client = c
2699
break
2700
else:
2701
logger.info("Client not found for key ID: %s, address"
2702
": %s", key_id or fpr, address)
2703
if self.use_dbus:
2704
# Emit D-Bus signal
2705
mandos_dbus_service.ClientNotFound(key_id or fpr,
2706
address[0])
2707
parent_pipe.send(False)
2708
return False
2709
2710
GLib.io_add_watch(
2711
parent_pipe.fileno(),
2712
GLib.IO_IN | GLib.IO_HUP,
2713
functools.partial(self.handle_ipc,
2714
parent_pipe=parent_pipe,
2715
proc=proc,
2716
client_object=client))
2717
parent_pipe.send(True)
2718
# remove the old hook in favor of the new above hook on
2719
# same fileno
2720
return False
2721
if command == 'funcall':
2722
funcname = request[1]
2723
args = request[2]
2724
kwargs = request[3]
2725
2726
parent_pipe.send(('data', getattr(client_object,
2727
funcname)(*args,
2728
**kwargs)))
2729
2730
if command == 'getattr':
2731
attrname = request[1]
2732
if isinstance(client_object.__getattribute__(attrname),
2733
collections.Callable):
2734
parent_pipe.send(('function', ))
2735
else:
2736
parent_pipe.send((
2737
'data', client_object.__getattribute__(attrname)))
2738
2739
if command == 'setattr':
2740
attrname = request[1]
2741
value = request[2]
2742
setattr(client_object, attrname, value)
2743
2744
return True
2745
2746
2747
def rfc3339_duration_to_delta(duration):
2748
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2749
2750
>>> rfc3339_duration_to_delta("P7D")
2751
datetime.timedelta(7)
2752
>>> rfc3339_duration_to_delta("PT60S")
2753
datetime.timedelta(0, 60)
2754
>>> rfc3339_duration_to_delta("PT60M")
2755
datetime.timedelta(0, 3600)
2756
>>> rfc3339_duration_to_delta("PT24H")
2757
datetime.timedelta(1)
2758
>>> rfc3339_duration_to_delta("P1W")
2759
datetime.timedelta(7)
2760
>>> rfc3339_duration_to_delta("PT5M30S")
2761
datetime.timedelta(0, 330)
2762
>>> rfc3339_duration_to_delta("P1DT3M20S")
2763
datetime.timedelta(1, 200)
2764
"""
2765
2766
# Parsing an RFC 3339 duration with regular expressions is not
2767
# possible - there would have to be multiple places for the same
2768
# values, like seconds. The current code, while more esoteric, is
2769
# cleaner without depending on a parsing library. If Python had a
2770
# built-in library for parsing we would use it, but we'd like to
2771
# avoid excessive use of external libraries.
2772
2773
# New type for defining tokens, syntax, and semantics all-in-one
2774
Token = collections.namedtuple("Token", (
2775
"regexp", # To match token; if "value" is not None, must have
2776
# a "group" containing digits
2777
"value", # datetime.timedelta or None
2778
"followers")) # Tokens valid after this token
2779
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2780
# the "duration" ABNF definition in RFC 3339, Appendix A.
2781
token_end = Token(re.compile(r"$"), None, frozenset())
2782
token_second = Token(re.compile(r"(\d+)S"),
2783
datetime.timedelta(seconds=1),
2784
frozenset((token_end, )))
2785
token_minute = Token(re.compile(r"(\d+)M"),
2786
datetime.timedelta(minutes=1),
2787
frozenset((token_second, token_end)))
2788
token_hour = Token(re.compile(r"(\d+)H"),
2789
datetime.timedelta(hours=1),
2790
frozenset((token_minute, token_end)))
2791
token_time = Token(re.compile(r"T"),
2792
None,
2793
frozenset((token_hour, token_minute,
2794
token_second)))
2795
token_day = Token(re.compile(r"(\d+)D"),
2796
datetime.timedelta(days=1),
2797
frozenset((token_time, token_end)))
2798
token_month = Token(re.compile(r"(\d+)M"),
2799
datetime.timedelta(weeks=4),
2800
frozenset((token_day, token_end)))
2801
token_year = Token(re.compile(r"(\d+)Y"),
2802
datetime.timedelta(weeks=52),
2803
frozenset((token_month, token_end)))
2804
token_week = Token(re.compile(r"(\d+)W"),
2805
datetime.timedelta(weeks=1),
2806
frozenset((token_end, )))
2807
token_duration = Token(re.compile(r"P"), None,
2808
frozenset((token_year, token_month,
2809
token_day, token_time,
2810
token_week)))
2811
# Define starting values:
2812
# Value so far
2813
value = datetime.timedelta()
2814
found_token = None
2815
# Following valid tokens
2816
followers = frozenset((token_duration, ))
2817
# String left to parse
2818
s = duration
2819
# Loop until end token is found
2820
while found_token is not token_end:
2821
# Search for any currently valid tokens
2822
for token in followers:
2823
match = token.regexp.match(s)
2824
if match is not None:
2825
# Token found
2826
if token.value is not None:
2827
# Value found, parse digits
2828
factor = int(match.group(1), 10)
2829
# Add to value so far
2830
value += factor * token.value
2831
# Strip token from string
2832
s = token.regexp.sub("", s, 1)
2833
# Go to found token
2834
found_token = token
2835
# Set valid next tokens
2836
followers = found_token.followers
2837
break
2838
else:
2839
# No currently valid tokens were found
2840
raise ValueError("Invalid RFC 3339 duration: {!r}"
2841
.format(duration))
2842
# End token found
2843
return value
2844
782
2845
783
2846
def string_to_delta(interval):
784
2847
"""Parse a string and return a datetime.timedelta
791
2854
datetime.timedelta(0, 3600)
792
2855
>>> string_to_delta('24h')
793
2856
datetime.timedelta(1)
794
>>> string_to_delta(u'1w')
2857
>>> string_to_delta('1w')
795
2858
datetime.timedelta(7)
796
2859
>>> string_to_delta('5m 30s')
797
2860
datetime.timedelta(0, 330)
798
2861
"""
2862
2863
try:
2864
return rfc3339_duration_to_delta(interval)
2865
except ValueError:
2866
pass
2867
799
2868
timevalue = datetime.timedelta(0)
800
2869
for s in interval.split():
801
2870
try:
802
suffix = unicode(s[-1])
2871
suffix = s[-1]
803
2872
value = int(s[:-1])
804
if suffix == u"d":
2873
if suffix == "d":
805
2874
delta = datetime.timedelta(value)
806
elif suffix == u"s":
2875
elif suffix == "s":
807
2876
delta = datetime.timedelta(0, value)
808
elif suffix == u"m":
2877
elif suffix == "m":
809
2878
delta = datetime.timedelta(0, 0, 0, 0, value)
810
elif suffix == u"h":
2879
elif suffix == "h":
811
2880
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
812
elif suffix == u"w":
2881
elif suffix == "w":
813
2882
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
814
2883
else:
815
raise ValueError
816
except (ValueError, IndexError):
817
raise ValueError
2884
raise ValueError("Unknown suffix {!r}".format(suffix))
2885
except IndexError as e:
2886
raise ValueError(*(e.args))
818
2887
timevalue += delta
819
2888
return timevalue
820
2889
821
2890
822
def server_state_changed(state):
823
"""Derived from the Avahi example code"""
824
if state == avahi.SERVER_COLLISION:
825
logger.error(u"Zeroconf server name collision")
826
service.remove()
827
elif state == avahi.SERVER_RUNNING:
828
service.add()
829
830
831
def entry_group_state_changed(state, error):
832
"""Derived from the Avahi example code"""
833
logger.debug(u"Avahi state change: %i", state)
834
835
if state == avahi.ENTRY_GROUP_ESTABLISHED:
836
logger.debug(u"Zeroconf service established.")
837
elif state == avahi.ENTRY_GROUP_COLLISION:
838
logger.warning(u"Zeroconf service name collision.")
839
service.rename()
840
elif state == avahi.ENTRY_GROUP_FAILURE:
841
logger.critical(u"Avahi: Error in group state changed %s",
842
unicode(error))
843
raise AvahiGroupError(u"State changed: %s" % unicode(error))
844
845
def if_nametoindex(interface):
846
"""Call the C function if_nametoindex(), or equivalent"""
847
global if_nametoindex
848
try:
849
if_nametoindex = (ctypes.cdll.LoadLibrary
850
(ctypes.util.find_library("c"))
851
.if_nametoindex)
852
except (OSError, AttributeError):
853
if "struct" not in sys.modules:
854
import struct
855
if "fcntl" not in sys.modules:
856
import fcntl
857
def if_nametoindex(interface):
858
"Get an interface index the hard way, i.e. using fcntl()"
859
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
860
with closing(socket.socket()) as s:
861
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
862
struct.pack("16s16x", interface))
863
interface_index = struct.unpack("I", ifreq[16:20])[0]
864
return interface_index
865
return if_nametoindex(interface)
866
867
868
def daemon(nochdir = False, noclose = False):
2891
def daemon(nochdir=False, noclose=False):
869
2892
"""See daemon(3). Standard BSD Unix function.
2893
870
2894
This should really exist as os.daemon, but it doesn't (yet)."""
871
2895
if os.fork():
872
2896
sys.exit()
877
2901
sys.exit()
878
2902
if not noclose:
879
2903
# Close all standard open file descriptors
880
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2904
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
881
2905
if not stat.S_ISCHR(os.fstat(null).st_mode):
882
2906
raise OSError(errno.ENODEV,
883
"/dev/null not a character device")
2907
"{} not a character device"
2908
.format(os.devnull))
884
2909
os.dup2(null, sys.stdin.fileno())
885
2910
os.dup2(null, sys.stdout.fileno())
886
2911
os.dup2(null, sys.stderr.fileno())
889
2914
890
2915
891
2916
def main():
892
parser = optparse.OptionParser(version = "%%prog %s" % version)
893
parser.add_option("-i", "--interface", type="string",
894
metavar="IF", help="Bind to interface IF")
895
parser.add_option("-a", "--address", type="string",
896
help="Address to listen for requests on")
897
parser.add_option("-p", "--port", type="int",
898
help="Port number to receive requests on")
899
parser.add_option("--check", action="store_true",
900
help="Run self-test")
901
parser.add_option("--debug", action="store_true",
902
help="Debug mode; run in foreground and log to"
903
" terminal")
904
parser.add_option("--priority", type="string", help="GnuTLS"
905
" priority string (see GnuTLS documentation)")
906
parser.add_option("--servicename", type="string", metavar="NAME",
907
help="Zeroconf service name")
908
parser.add_option("--configdir", type="string",
909
default="/etc/mandos", metavar="DIR",
910
help="Directory to search for configuration"
911
" files")
912
parser.add_option("--no-dbus", action="store_false",
913
dest="use_dbus",
914
help=optparse.SUPPRESS_HELP) # XXX: Not done yet
915
options = parser.parse_args()[0]
916
2917
2918
##################################################################
2919
# Parsing of options, both command line and config file
2920
2921
parser = argparse.ArgumentParser()
2922
parser.add_argument("-v", "--version", action="version",
2923
version="%(prog)s {}".format(version),
2924
help="show version number and exit")
2925
parser.add_argument("-i", "--interface", metavar="IF",
2926
help="Bind to interface IF")
2927
parser.add_argument("-a", "--address",
2928
help="Address to listen for requests on")
2929
parser.add_argument("-p", "--port", type=int,
2930
help="Port number to receive requests on")
2931
parser.add_argument("--check", action="store_true",
2932
help="Run self-test")
2933
parser.add_argument("--debug", action="store_true",
2934
help="Debug mode; run in foreground and log"
2935
" to terminal", default=None)
2936
parser.add_argument("--debuglevel", metavar="LEVEL",
2937
help="Debug level for stdout output")
2938
parser.add_argument("--priority", help="GnuTLS"
2939
" priority string (see GnuTLS documentation)")
2940
parser.add_argument("--servicename",
2941
metavar="NAME", help="Zeroconf service name")
2942
parser.add_argument("--configdir",
2943
default="/etc/mandos", metavar="DIR",
2944
help="Directory to search for configuration"
2945
" files")
2946
parser.add_argument("--no-dbus", action="store_false",
2947
dest="use_dbus", help="Do not provide D-Bus"
2948
" system bus interface", default=None)
2949
parser.add_argument("--no-ipv6", action="store_false",
2950
dest="use_ipv6", help="Do not use IPv6",
2951
default=None)
2952
parser.add_argument("--no-restore", action="store_false",
2953
dest="restore", help="Do not restore stored"
2954
" state", default=None)
2955
parser.add_argument("--socket", type=int,
2956
help="Specify a file descriptor to a network"
2957
" socket to use instead of creating one")
2958
parser.add_argument("--statedir", metavar="DIR",
2959
help="Directory to save/restore state in")
2960
parser.add_argument("--foreground", action="store_true",
2961
help="Run in foreground", default=None)
2962
parser.add_argument("--no-zeroconf", action="store_false",
2963
dest="zeroconf", help="Do not use Zeroconf",
2964
default=None)
2965
2966
options = parser.parse_args()
2967
917
2968
if options.check:
918
2969
import doctest
919
doctest.testmod()
920
sys.exit()
921
2970
fail_count, test_count = doctest.testmod()
2971
sys.exit(os.EX_OK if fail_count == 0 else 1)
2972
922
2973
# Default values for config file for server-global settings
923
server_defaults = { "interface": "",
924
"address": "",
925
"port": "",
926
"debug": "False",
927
"priority":
928
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
929
"servicename": "Mandos",
930
"use_dbus": "True",
931
}
932
2974
if gnutls.has_rawpk:
2975
priority = ("SECURE128:!CTYPE-X.509:+CTYPE-RAWPK:!RSA"
2976
":!VERS-ALL:+VERS-TLS1.3:%PROFILE_ULTRA")
2977
else:
2978
priority = ("SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2979
":+SIGN-DSA-SHA256")
2980
server_defaults = {"interface": "",
2981
"address": "",
2982
"port": "",
2983
"debug": "False",
2984
"priority": priority,
2985
"servicename": "Mandos",
2986
"use_dbus": "True",
2987
"use_ipv6": "True",
2988
"debuglevel": "",
2989
"restore": "True",
2990
"socket": "",
2991
"statedir": "/var/lib/mandos",
2992
"foreground": "False",
2993
"zeroconf": "True",
2994
}
2995
del priority
2996
933
2997
# Parse config file for server-global settings
934
server_config = ConfigParser.SafeConfigParser(server_defaults)
2998
server_config = configparser.SafeConfigParser(server_defaults)
935
2999
del server_defaults
936
3000
server_config.read(os.path.join(options.configdir, "mandos.conf"))
937
3001
# Convert the SafeConfigParser object to a dict
938
3002
server_settings = server_config.defaults()
939
# Use getboolean on the boolean config options
940
server_settings["debug"] = (server_config.getboolean
941
("DEFAULT", "debug"))
942
server_settings["use_dbus"] = (server_config.getboolean
943
("DEFAULT", "use_dbus"))
3003
# Use the appropriate methods on the non-string config options
3004
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3005
"foreground", "zeroconf"):
3006
server_settings[option] = server_config.getboolean("DEFAULT",
3007
option)
3008
if server_settings["port"]:
3009
server_settings["port"] = server_config.getint("DEFAULT",
3010
"port")
3011
if server_settings["socket"]:
3012
server_settings["socket"] = server_config.getint("DEFAULT",
3013
"socket")
3014
# Later, stdin will, and stdout and stderr might, be dup'ed
3015
# over with an opened os.devnull. But we don't want this to
3016
# happen with a supplied network socket.
3017
if 0 <= server_settings["socket"] <= 2:
3018
server_settings["socket"] = os.dup(server_settings
3019
["socket"])
944
3020
del server_config
945
3021
946
3022
# Override the settings from the config file with command line
947
3023
# options, if set.
948
3024
for option in ("interface", "address", "port", "debug",
949
"priority", "servicename", "configdir",
950
"use_dbus"):
3025
"priority", "servicename", "configdir", "use_dbus",
3026
"use_ipv6", "debuglevel", "restore", "statedir",
3027
"socket", "foreground", "zeroconf"):
951
3028
value = getattr(options, option)
952
3029
if value is not None:
953
3030
server_settings[option] = value
954
3031
del options
3032
# Force all strings to be unicode
3033
for option in server_settings.keys():
3034
if isinstance(server_settings[option], bytes):
3035
server_settings[option] = (server_settings[option]
3036
.decode("utf-8"))
3037
# Force all boolean options to be boolean
3038
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3039
"foreground", "zeroconf"):
3040
server_settings[option] = bool(server_settings[option])
3041
# Debug implies foreground
3042
if server_settings["debug"]:
3043
server_settings["foreground"] = True
955
3044
# Now we have our good server settings in "server_settings"
956
3045
3046
##################################################################
3047
3048
if (not server_settings["zeroconf"]
3049
and not (server_settings["port"]
3050
or server_settings["socket"] != "")):
3051
parser.error("Needs port or socket to work without Zeroconf")
3052
957
3053
# For convenience
958
3054
debug = server_settings["debug"]
3055
debuglevel = server_settings["debuglevel"]
959
3056
use_dbus = server_settings["use_dbus"]
960
use_dbus = False # XXX: Not done yet
961
962
if not debug:
963
syslogger.setLevel(logging.WARNING)
964
console.setLevel(logging.WARNING)
965
3057
use_ipv6 = server_settings["use_ipv6"]
3058
stored_state_path = os.path.join(server_settings["statedir"],
3059
stored_state_file)
3060
foreground = server_settings["foreground"]
3061
zeroconf = server_settings["zeroconf"]
3062
3063
if debug:
3064
initlogger(debug, logging.DEBUG)
3065
else:
3066
if not debuglevel:
3067
initlogger(debug)
3068
else:
3069
level = getattr(logging, debuglevel.upper())
3070
initlogger(debug, level)
3071
966
3072
if server_settings["servicename"] != "Mandos":
967
syslogger.setFormatter(logging.Formatter
968
('Mandos (%s): %%(levelname)s:'
969
' %%(message)s'
970
% server_settings["servicename"]))
971
3073
syslogger.setFormatter(
3074
logging.Formatter('Mandos ({}) [%(process)d]:'
3075
' %(levelname)s: %(message)s'.format(
3076
server_settings["servicename"])))
3077
972
3078
# Parse config file with clients
973
client_defaults = { "timeout": "1h",
974
"interval": "5m",
975
"checker": "fping -q -- %%(host)s",
976
"host": "",
977
}
978
client_config = ConfigParser.SafeConfigParser(client_defaults)
3079
client_config = configparser.SafeConfigParser(Client
3080
.client_defaults)
979
3081
client_config.read(os.path.join(server_settings["configdir"],
980
3082
"clients.conf"))
981
982
clients = Set()
983
tcp_server = IPv6_TCPServer((server_settings["address"],
984
server_settings["port"]),
985
TCP_handler,
986
settings=server_settings,
987
clients=clients)
988
pidfilename = "/var/run/mandos.pid"
989
try:
990
pidfile = open(pidfilename, "w")
991
except IOError, error:
992
logger.error("Could not open file %r", pidfilename)
993
994
try:
995
uid = pwd.getpwnam("_mandos").pw_uid
996
gid = pwd.getpwnam("_mandos").pw_gid
997
except KeyError:
998
try:
999
uid = pwd.getpwnam("mandos").pw_uid
1000
gid = pwd.getpwnam("mandos").pw_gid
3083
3084
global mandos_dbus_service
3085
mandos_dbus_service = None
3086
3087
socketfd = None
3088
if server_settings["socket"] != "":
3089
socketfd = server_settings["socket"]
3090
tcp_server = MandosServer(
3091
(server_settings["address"], server_settings["port"]),
3092
ClientHandler,
3093
interface=(server_settings["interface"] or None),
3094
use_ipv6=use_ipv6,
3095
gnutls_priority=server_settings["priority"],
3096
use_dbus=use_dbus,
3097
socketfd=socketfd)
3098
if not foreground:
3099
pidfilename = "/run/mandos.pid"
3100
if not os.path.isdir("/run/."):
3101
pidfilename = "/var/run/mandos.pid"
3102
pidfile = None
3103
try:
3104
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
3105
except IOError as e:
3106
logger.error("Could not open file %r", pidfilename,
3107
exc_info=e)
3108
3109
for name, group in (("_mandos", "_mandos"),
3110
("mandos", "mandos"),
3111
("nobody", "nogroup")):
3112
try:
3113
uid = pwd.getpwnam(name).pw_uid
3114
gid = pwd.getpwnam(group).pw_gid
3115
break
1001
3116
except KeyError:
1002
try:
1003
uid = pwd.getpwnam("nobody").pw_uid
1004
gid = pwd.getpwnam("nogroup").pw_gid
1005
except KeyError:
1006
uid = 65534
1007
gid = 65534
3117
continue
3118
else:
3119
uid = 65534
3120
gid = 65534
1008
3121
try:
3122
os.setgid(gid)
1009
3123
os.setuid(uid)
1010
os.setgid(gid)
1011
except OSError, error:
1012
if error[0] != errno.EPERM:
1013
raise error
1014
1015
global service
1016
service = AvahiService(name = server_settings["servicename"],
1017
servicetype = "_mandos._tcp", )
1018
if server_settings["interface"]:
1019
service.interface = (if_nametoindex
1020
(server_settings["interface"]))
1021
3124
if debug:
3125
logger.debug("Did setuid/setgid to {}:{}".format(uid,
3126
gid))
3127
except OSError as error:
3128
logger.warning("Failed to setuid/setgid to {}:{}: {}"
3129
.format(uid, gid, os.strerror(error.errno)))
3130
if error.errno != errno.EPERM:
3131
raise
3132
3133
if debug:
3134
# Enable all possible GnuTLS debugging
3135
3136
# "Use a log level over 10 to enable all debugging options."
3137
# - GnuTLS manual
3138
gnutls.global_set_log_level(11)
3139
3140
@gnutls.log_func
3141
def debug_gnutls(level, string):
3142
logger.debug("GnuTLS: %s", string[:-1])
3143
3144
gnutls.global_set_log_function(debug_gnutls)
3145
3146
# Redirect stdin so all checkers get /dev/null
3147
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
3148
os.dup2(null, sys.stdin.fileno())
3149
if null > 2:
3150
os.close(null)
3151
3152
# Need to fork before connecting to D-Bus
3153
if not foreground:
3154
# Close all input and output, do double fork, etc.
3155
daemon()
3156
3157
# multiprocessing will use threads, so before we use GLib we need
3158
# to inform GLib that threads will be used.
3159
GLib.threads_init()
3160
1022
3161
global main_loop
1023
global bus
1024
global server
1025
3162
# From the Avahi example code
1026
DBusGMainLoop(set_as_default=True )
1027
main_loop = gobject.MainLoop()
3163
DBusGMainLoop(set_as_default=True)
3164
main_loop = GLib.MainLoop()
1028
3165
bus = dbus.SystemBus()
1029
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
1030
avahi.DBUS_PATH_SERVER),
1031
avahi.DBUS_INTERFACE_SERVER)
1032
3166
# End of Avahi example code
1033
3167
if use_dbus:
1034
bus_name = dbus.service.BusName(u"org.mandos-system.Mandos",
1035
bus)
1036
1037
clients.update(Set(Client(name = section,
1038
config
1039
= dict(client_config.items(section)),
1040
use_dbus = use_dbus)
1041
for section in client_config.sections()))
1042
if not clients:
1043
logger.warning(u"No clients defined")
1044
1045
if debug:
1046
# Redirect stdin so all checkers get /dev/null
1047
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1048
os.dup2(null, sys.stdin.fileno())
1049
if null > 2:
1050
os.close(null)
1051
else:
1052
# No console logging
1053
logger.removeHandler(console)
1054
# Close all input and output, do double fork, etc.
1055
daemon()
1056
1057
try:
1058
pid = os.getpid()
1059
pidfile.write(str(pid) + "\n")
1060
pidfile.close()
3168
try:
3169
bus_name = dbus.service.BusName("se.recompile.Mandos",
3170
bus,
3171
do_not_queue=True)
3172
old_bus_name = dbus.service.BusName(
3173
"se.bsnet.fukt.Mandos", bus,
3174
do_not_queue=True)
3175
except dbus.exceptions.DBusException as e:
3176
logger.error("Disabling D-Bus:", exc_info=e)
3177
use_dbus = False
3178
server_settings["use_dbus"] = False
3179
tcp_server.use_dbus = False
3180
if zeroconf:
3181
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3182
service = AvahiServiceToSyslog(
3183
name=server_settings["servicename"],
3184
servicetype="_mandos._tcp",
3185
protocol=protocol,
3186
bus=bus)
3187
if server_settings["interface"]:
3188
service.interface = if_nametoindex(
3189
server_settings["interface"].encode("utf-8"))
3190
3191
global multiprocessing_manager
3192
multiprocessing_manager = multiprocessing.Manager()
3193
3194
client_class = Client
3195
if use_dbus:
3196
client_class = functools.partial(ClientDBus, bus=bus)
3197
3198
client_settings = Client.config_parser(client_config)
3199
old_client_settings = {}
3200
clients_data = {}
3201
3202
# This is used to redirect stdout and stderr for checker processes
3203
global wnull
3204
wnull = open(os.devnull, "w") # A writable /dev/null
3205
# Only used if server is running in foreground but not in debug
3206
# mode
3207
if debug or not foreground:
3208
wnull.close()
3209
3210
# Get client data and settings from last running state.
3211
if server_settings["restore"]:
3212
try:
3213
with open(stored_state_path, "rb") as stored_state:
3214
if sys.version_info.major == 2:
3215
clients_data, old_client_settings = pickle.load(
3216
stored_state)
3217
else:
3218
bytes_clients_data, bytes_old_client_settings = (
3219
pickle.load(stored_state, encoding="bytes"))
3220
# Fix bytes to strings
3221
# clients_data
3222
# .keys()
3223
clients_data = {(key.decode("utf-8")
3224
if isinstance(key, bytes)
3225
else key): value
3226
for key, value in
3227
bytes_clients_data.items()}
3228
del bytes_clients_data
3229
for key in clients_data:
3230
value = {(k.decode("utf-8")
3231
if isinstance(k, bytes) else k): v
3232
for k, v in
3233
clients_data[key].items()}
3234
clients_data[key] = value
3235
# .client_structure
3236
value["client_structure"] = [
3237
(s.decode("utf-8")
3238
if isinstance(s, bytes)
3239
else s) for s in
3240
value["client_structure"]]
3241
# .name & .host
3242
for k in ("name", "host"):
3243
if isinstance(value[k], bytes):
3244
value[k] = value[k].decode("utf-8")
3245
if not value.has_key("key_id"):
3246
value["key_id"] = ""
3247
elif not value.has_key("fingerprint"):
3248
value["fingerprint"] = ""
3249
# old_client_settings
3250
# .keys()
3251
old_client_settings = {
3252
(key.decode("utf-8")
3253
if isinstance(key, bytes)
3254
else key): value
3255
for key, value in
3256
bytes_old_client_settings.items()}
3257
del bytes_old_client_settings
3258
# .host
3259
for value in old_client_settings.values():
3260
if isinstance(value["host"], bytes):
3261
value["host"] = (value["host"]
3262
.decode("utf-8"))
3263
os.remove(stored_state_path)
3264
except IOError as e:
3265
if e.errno == errno.ENOENT:
3266
logger.warning("Could not load persistent state:"
3267
" {}".format(os.strerror(e.errno)))
3268
else:
3269
logger.critical("Could not load persistent state:",
3270
exc_info=e)
3271
raise
3272
except EOFError as e:
3273
logger.warning("Could not load persistent state: "
3274
"EOFError:",
3275
exc_info=e)
3276
3277
with PGPEngine() as pgp:
3278
for client_name, client in clients_data.items():
3279
# Skip removed clients
3280
if client_name not in client_settings:
3281
continue
3282
3283
# Decide which value to use after restoring saved state.
3284
# We have three different values: Old config file,
3285
# new config file, and saved state.
3286
# New config value takes precedence if it differs from old
3287
# config value, otherwise use saved state.
3288
for name, value in client_settings[client_name].items():
3289
try:
3290
# For each value in new config, check if it
3291
# differs from the old config value (Except for
3292
# the "secret" attribute)
3293
if (name != "secret"
3294
and (value !=
3295
old_client_settings[client_name][name])):
3296
client[name] = value
3297
except KeyError:
3298
pass
3299
3300
# Clients who has passed its expire date can still be
3301
# enabled if its last checker was successful. A Client
3302
# whose checker succeeded before we stored its state is
3303
# assumed to have successfully run all checkers during
3304
# downtime.
3305
if client["enabled"]:
3306
if datetime.datetime.utcnow() >= client["expires"]:
3307
if not client["last_checked_ok"]:
3308
logger.warning(
3309
"disabling client {} - Client never "
3310
"performed a successful checker".format(
3311
client_name))
3312
client["enabled"] = False
3313
elif client["last_checker_status"] != 0:
3314
logger.warning(
3315
"disabling client {} - Client last"
3316
" checker failed with error code"
3317
" {}".format(
3318
client_name,
3319
client["last_checker_status"]))
3320
client["enabled"] = False
3321
else:
3322
client["expires"] = (
3323
datetime.datetime.utcnow()
3324
+ client["timeout"])
3325
logger.debug("Last checker succeeded,"
3326
" keeping {} enabled".format(
3327
client_name))
3328
try:
3329
client["secret"] = pgp.decrypt(
3330
client["encrypted_secret"],
3331
client_settings[client_name]["secret"])
3332
except PGPError:
3333
# If decryption fails, we use secret from new settings
3334
logger.debug("Failed to decrypt {} old secret".format(
3335
client_name))
3336
client["secret"] = (client_settings[client_name]
3337
["secret"])
3338
3339
# Add/remove clients based on new changes made to config
3340
for client_name in (set(old_client_settings)
3341
- set(client_settings)):
3342
del clients_data[client_name]
3343
for client_name in (set(client_settings)
3344
- set(old_client_settings)):
3345
clients_data[client_name] = client_settings[client_name]
3346
3347
# Create all client objects
3348
for client_name, client in clients_data.items():
3349
tcp_server.clients[client_name] = client_class(
3350
name=client_name,
3351
settings=client,
3352
server_settings=server_settings)
3353
3354
if not tcp_server.clients:
3355
logger.warning("No clients defined")
3356
3357
if not foreground:
3358
if pidfile is not None:
3359
pid = os.getpid()
3360
try:
3361
with pidfile:
3362
print(pid, file=pidfile)
3363
except IOError:
3364
logger.error("Could not write to file %r with PID %d",
3365
pidfilename, pid)
1061
3366
del pidfile
1062
except IOError:
1063
logger.error(u"Could not write to file %r with PID %d",
1064
pidfilename, pid)
1065
except NameError:
1066
# "pidfile" was never created
1067
pass
1068
del pidfilename
1069
1070
def cleanup():
1071
"Cleanup function; run on exit"
1072
global group
1073
# From the Avahi example code
1074
if not group is None:
1075
group.Free()
1076
group = None
1077
# End of Avahi example code
1078
1079
while clients:
1080
client = clients.pop()
1081
client.disable_hook = None
1082
client.disable()
1083
1084
atexit.register(cleanup)
1085
1086
if not debug:
1087
signal.signal(signal.SIGINT, signal.SIG_IGN)
1088
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1089
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1090
3367
del pidfilename
3368
3369
for termsig in (signal.SIGHUP, signal.SIGTERM):
3370
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3371
lambda: main_loop.quit() and False)
3372
1091
3373
if use_dbus:
1092
class MandosServer(dbus.service.Object):
3374
3375
@alternate_dbus_interfaces(
3376
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3377
class MandosDBusService(DBusObjectWithObjectManager):
1093
3378
"""A D-Bus proxy object"""
3379
1094
3380
def __init__(self):
1095
dbus.service.Object.__init__(self, bus,
1096
"/Mandos")
1097
_interface = u"org.mandos_system.Mandos"
3381
dbus.service.Object.__init__(self, bus, "/")
1098
3382
1099
@dbus.service.signal(_interface, signature="oa{sv}")
1100
def ClientAdded(self, objpath, properties):
1101
"D-Bus signal"
1102
pass
3383
_interface = "se.recompile.Mandos"
1103
3384
1104
3385
@dbus.service.signal(_interface, signature="o")
1105
def ClientRemoved(self, objpath):
1106
"D-Bus signal"
1107
pass
1108
3386
def ClientAdded(self, objpath):
3387
"D-Bus signal"
3388
pass
3389
3390
@dbus.service.signal(_interface, signature="ss")
3391
def ClientNotFound(self, key_id, address):
3392
"D-Bus signal"
3393
pass
3394
3395
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3396
"true"})
3397
@dbus.service.signal(_interface, signature="os")
3398
def ClientRemoved(self, objpath, name):
3399
"D-Bus signal"
3400
pass
3401
3402
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3403
"true"})
1109
3404
@dbus.service.method(_interface, out_signature="ao")
1110
3405
def GetAllClients(self):
1111
return dbus.Array(c.dbus_object_path for c in clients)
3406
"D-Bus method"
3407
return dbus.Array(c.dbus_object_path for c in
3408
tcp_server.clients.values())
1112
3409
1113
@dbus.service.method(_interface, out_signature="a{oa{sv}}")
3410
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3411
"true"})
3412
@dbus.service.method(_interface,
3413
out_signature="a{oa{sv}}")
1114
3414
def GetAllClientsWithProperties(self):
3415
"D-Bus method"
1115
3416
return dbus.Dictionary(
1116
((c.dbus_object_path, c.GetAllProperties())
1117
for c in clients),
3417
{c.dbus_object_path: c.GetAll(
3418
"se.recompile.Mandos.Client")
3419
for c in tcp_server.clients.values()},
1118
3420
signature="oa{sv}")
1119
3421
1120
3422
@dbus.service.method(_interface, in_signature="o")
1121
3423
def RemoveClient(self, object_path):
1122
for c in clients:
3424
"D-Bus method"
3425
for c in tcp_server.clients.values():
1123
3426
if c.dbus_object_path == object_path:
1124
clients.remove(c)
1125
# Don't signal anything except ClientRemoved
1126
c.use_dbus = False
1127
c.disable()
1128
# Emit D-Bus signal
1129
self.ClientRemoved(object_path)
3427
del tcp_server.clients[c.name]
3428
c.remove_from_connection()
3429
# Don't signal the disabling
3430
c.disable(quiet=True)
3431
# Emit D-Bus signal for removal
3432
self.client_removed_signal(c)
1130
3433
return
1131
raise KeyError
1132
@dbus.service.method(_interface)
1133
def Quit(self):
1134
main_loop.quit()
3434
raise KeyError(object_path)
1135
3435
1136
3436
del _interface
1137
1138
mandos_server = MandosServer()
1139
1140
for client in clients:
3437
3438
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3439
out_signature="a{oa{sa{sv}}}")
3440
def GetManagedObjects(self):
3441
"""D-Bus method"""
3442
return dbus.Dictionary(
3443
{client.dbus_object_path:
3444
dbus.Dictionary(
3445
{interface: client.GetAll(interface)
3446
for interface in
3447
client._get_all_interface_names()})
3448
for client in tcp_server.clients.values()})
3449
3450
def client_added_signal(self, client):
3451
"""Send the new standard signal and the old signal"""
3452
if use_dbus:
3453
# New standard signal
3454
self.InterfacesAdded(
3455
client.dbus_object_path,
3456
dbus.Dictionary(
3457
{interface: client.GetAll(interface)
3458
for interface in
3459
client._get_all_interface_names()}))
3460
# Old signal
3461
self.ClientAdded(client.dbus_object_path)
3462
3463
def client_removed_signal(self, client):
3464
"""Send the new standard signal and the old signal"""
3465
if use_dbus:
3466
# New standard signal
3467
self.InterfacesRemoved(
3468
client.dbus_object_path,
3469
client._get_all_interface_names())
3470
# Old signal
3471
self.ClientRemoved(client.dbus_object_path,
3472
client.name)
3473
3474
mandos_dbus_service = MandosDBusService()
3475
3476
# Save modules to variables to exempt the modules from being
3477
# unloaded before the function registered with atexit() is run.
3478
mp = multiprocessing
3479
wn = wnull
3480
3481
def cleanup():
3482
"Cleanup function; run on exit"
3483
if zeroconf:
3484
service.cleanup()
3485
3486
mp.active_children()
3487
wn.close()
3488
if not (tcp_server.clients or client_settings):
3489
return
3490
3491
# Store client before exiting. Secrets are encrypted with key
3492
# based on what config file has. If config file is
3493
# removed/edited, old secret will thus be unrecovable.
3494
clients = {}
3495
with PGPEngine() as pgp:
3496
for client in tcp_server.clients.values():
3497
key = client_settings[client.name]["secret"]
3498
client.encrypted_secret = pgp.encrypt(client.secret,
3499
key)
3500
client_dict = {}
3501
3502
# A list of attributes that can not be pickled
3503
# + secret.
3504
exclude = {"bus", "changedstate", "secret",
3505
"checker", "server_settings"}
3506
for name, typ in inspect.getmembers(dbus.service
3507
.Object):
3508
exclude.add(name)
3509
3510
client_dict["encrypted_secret"] = (client
3511
.encrypted_secret)
3512
for attr in client.client_structure:
3513
if attr not in exclude:
3514
client_dict[attr] = getattr(client, attr)
3515
3516
clients[client.name] = client_dict
3517
del client_settings[client.name]["secret"]
3518
3519
try:
3520
with tempfile.NamedTemporaryFile(
3521
mode='wb',
3522
suffix=".pickle",
3523
prefix='clients-',
3524
dir=os.path.dirname(stored_state_path),
3525
delete=False) as stored_state:
3526
pickle.dump((clients, client_settings), stored_state,
3527
protocol=2)
3528
tempname = stored_state.name
3529
os.rename(tempname, stored_state_path)
3530
except (IOError, OSError) as e:
3531
if not debug:
3532
try:
3533
os.remove(tempname)
3534
except NameError:
3535
pass
3536
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
3537
logger.warning("Could not save persistent state: {}"
3538
.format(os.strerror(e.errno)))
3539
else:
3540
logger.warning("Could not save persistent state:",
3541
exc_info=e)
3542
raise
3543
3544
# Delete all clients, and settings from config
3545
while tcp_server.clients:
3546
name, client = tcp_server.clients.popitem()
3547
if use_dbus:
3548
client.remove_from_connection()
3549
# Don't signal the disabling
3550
client.disable(quiet=True)
3551
# Emit D-Bus signal for removal
3552
if use_dbus:
3553
mandos_dbus_service.client_removed_signal(client)
3554
client_settings.clear()
3555
3556
atexit.register(cleanup)
3557
3558
for client in tcp_server.clients.values():
1141
3559
if use_dbus:
1142
# Emit D-Bus signal
1143
mandos_server.ClientAdded(client.dbus_object_path,
1144
client.GetAllProperties())
1145
client.enable()
1146
3560
# Emit D-Bus signal for adding
3561
mandos_dbus_service.client_added_signal(client)
3562
# Need to initiate checking of clients
3563
if client.enabled:
3564
client.init_checker()
3565
1147
3566
tcp_server.enable()
1148
3567
tcp_server.server_activate()
1149
3568
1150
3569
# Find out what port we got
1151
service.port = tcp_server.socket.getsockname()[1]
1152
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
1153
u" scope_id %d" % tcp_server.socket.getsockname())
1154
1155
#service.interface = tcp_server.socket.getsockname()[3]
1156
3570
if zeroconf:
3571
service.port = tcp_server.socket.getsockname()[1]
3572
if use_ipv6:
3573
logger.info("Now listening on address %r, port %d,"
3574
" flowinfo %d, scope_id %d",
3575
*tcp_server.socket.getsockname())
3576
else: # IPv4
3577
logger.info("Now listening on address %r, port %d",
3578
*tcp_server.socket.getsockname())
3579
3580
# service.interface = tcp_server.socket.getsockname()[3]
3581
1157
3582
try:
1158
# From the Avahi example code
1159
server.connect_to_signal("StateChanged", server_state_changed)
1160
try:
1161
server_state_changed(server.GetState())
1162
except dbus.exceptions.DBusException, error:
1163
logger.critical(u"DBusException: %s", error)
1164
sys.exit(1)
1165
# End of Avahi example code
1166
1167
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
1168
lambda *args, **kwargs:
1169
(tcp_server.handle_request
1170
(*args[2:], **kwargs) or True))
1171
1172
logger.debug(u"Starting main loop")
3583
if zeroconf:
3584
# From the Avahi example code
3585
try:
3586
service.activate()
3587
except dbus.exceptions.DBusException as error:
3588
logger.critical("D-Bus Exception", exc_info=error)
3589
cleanup()
3590
sys.exit(1)
3591
# End of Avahi example code
3592
3593
GLib.io_add_watch(tcp_server.fileno(), GLib.IO_IN,
3594
lambda *args, **kwargs:
3595
(tcp_server.handle_request
3596
(*args[2:], **kwargs) or True))
3597
3598
logger.debug("Starting main loop")
1173
3599
main_loop.run()
1174
except AvahiError, error:
1175
logger.critical(u"AvahiError: %s", error)
3600
except AvahiError as error:
3601
logger.critical("Avahi Error", exc_info=error)
3602
cleanup()
1176
3603
sys.exit(1)
1177
3604
except KeyboardInterrupt:
1178
3605
if debug:
1179
print
3606
print("", file=sys.stderr)
3607
logger.debug("Server received KeyboardInterrupt")
3608
logger.debug("Server exiting")
3609
# Must run before the D-Bus bus name gets deregistered
3610
cleanup()
3611
1180
3612
1181
3613
if __name__ == '__main__':
1182
3614
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0