To get this branch, use:
bzr branch
http://bzr.recompile.se/loggerhead/mandos/trunk
« back to all changes in this revision
Viewing changes to server.py
- browse files at revision 14
- compare with another revision
- download diff
- download tarball
- view history from revision 14
- Committer: Björn Påhlsson
- Date: 2008-07-20 03:51:41 UTC
- Revision ID: belorn@braxen-20080720035141-ta0y0be7fotdm4ks
Fixed a overbufferflow bug, thanks to a forgotten \0
- files added:
- ca.pem
- files removed:
- .bzr-builddeb
- debian
- debian/po
- debian/source
- debian/tests
- debian/upstream
- dracut-module
- network-hooks.d
- plugin-helpers
- files renamed:
- clients.conf => mandos-clients.conf
- plugin-runner.c => plugbasedclient.c
- plugins.d/mandos-client.c => plugins.d/mandosclient.c
- plugins.d/password-prompt.c => plugins.d/passprompt.c
- mandos => server.py
- files modified:
- Makefile
added
removed
server.py
1
#!/usr/bin/python3 -bI
2
# -*- mode: python; after-save-hook: (lambda () (let ((command (if (fboundp 'file-local-name) (file-local-name (buffer-file-name)) (or (file-remote-p (buffer-file-name) 'localname) (buffer-file-name))))) (if (= (progn (if (get-buffer "*Test*") (kill-buffer "*Test*")) (process-file-shell-command (format "%s --check" (shell-quote-argument command)) nil "*Test*")) 0) (let ((w (get-buffer-window "*Test*"))) (if w (delete-window w))) (progn (with-current-buffer "*Test*" (compilation-mode)) (display-buffer "*Test*" '(display-buffer-in-side-window)))))); coding: utf-8 -*-
3
#
4
# Mandos server - give out binary blobs to connecting clients.
5
#
6
# This program is partly derived from an example program for an Avahi
7
# service publisher, downloaded from
8
# <http://avahi.org/wiki/PythonPublishExample>. This includes the
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
# Everything else is
14
# Copyright © 2008-2020 Teddy Hogeborn
15
# Copyright © 2008-2020 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
21
# the Free Software Foundation, either version 3 of the License, or
22
# (at your option) any later version.
23
#
24
# Mandos is distributed in the hope that it will be useful, but
25
# WITHOUT ANY WARRANTY; without even the implied warranty of
26
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
27
# GNU General Public License for more details.
28
#
29
# You should have received a copy of the GNU General Public License
30
# along with Mandos. If not, see <http://www.gnu.org/licenses/>.
31
#
32
# Contact the authors at <mandos@recompile.se>.
33
#
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
1
#!/usr/bin/python
2
3
from __future__ import division
4
5
import SocketServer
47
6
import socket
48
import argparse
7
import select
8
from optparse import OptionParser
49
9
import datetime
50
10
import errno
51
try:
52
import ConfigParser as configparser
53
except ImportError:
54
import configparser
11
import gnutls.crypto
12
import gnutls.connection
13
import gnutls.errors
14
import gnutls.library.functions
15
import gnutls.library.constants
16
import gnutls.library.types
17
import ConfigParser
55
18
import sys
56
19
import re
57
20
import os
58
21
import signal
22
from sets import Set
59
23
import subprocess
60
import atexit
61
import stat
62
import logging
63
import logging.handlers
64
import pwd
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
80
import unittest
81
import random
82
import shlex
83
24
84
25
import dbus
85
import dbus.service
86
import gi
87
from gi.repository import GLib
26
import gobject
27
import avahi
88
28
from dbus.mainloop.glib import DBusGMainLoop
89
29
import ctypes
90
import ctypes.util
91
import xml.dom.minidom
92
import inspect
93
94
if sys.version_info.major == 2:
95
__metaclass__ = type
96
str = unicode
97
98
# Add collections.abc.Callable if it does not exist
99
try:
100
collections.abc.Callable
101
except AttributeError:
102
class abc:
103
Callable = collections.Callable
104
collections.abc = abc
105
del abc
106
107
# Add shlex.quote if it does not exist
108
try:
109
shlex.quote
110
except AttributeError:
111
shlex.quote = re.escape
112
113
# Show warnings by default
114
if not sys.warnoptions:
115
import warnings
116
warnings.simplefilter("default")
117
118
# Try to find the value of SO_BINDTODEVICE:
119
try:
120
# This is where SO_BINDTODEVICE is in Python 3.3 (or 3.4?) and
121
# newer, and it is also the most natural place for it:
122
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
123
except AttributeError:
124
try:
125
# This is where SO_BINDTODEVICE was up to and including Python
126
# 2.6, and also 3.2:
127
from IN import SO_BINDTODEVICE
128
except ImportError:
129
# In Python 2.7 it seems to have been removed entirely.
130
# Try running the C preprocessor:
131
try:
132
cc = subprocess.Popen(["cc", "--language=c", "-E",
133
"/dev/stdin"],
134
stdin=subprocess.PIPE,
135
stdout=subprocess.PIPE)
136
stdout = cc.communicate(
137
"#include <sys/socket.h>\nSO_BINDTODEVICE\n")[0]
138
SO_BINDTODEVICE = int(stdout.splitlines()[-1])
139
except (OSError, ValueError, IndexError):
140
# No value found
141
SO_BINDTODEVICE = None
142
143
if sys.version_info < (3, 2):
144
configparser.Configparser = configparser.SafeConfigParser
145
146
version = "1.8.14"
147
stored_state_file = "clients.pickle"
148
149
logger = logging.getLogger()
150
logging.captureWarnings(True) # Show warnings via the logging system
151
syslogger = None
152
153
try:
154
if_nametoindex = ctypes.cdll.LoadLibrary(
155
ctypes.util.find_library("c")).if_nametoindex
156
except (OSError, AttributeError):
157
158
def if_nametoindex(interface):
159
"Get an interface index the hard way, i.e. using fcntl()"
160
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
161
with contextlib.closing(socket.socket()) as s:
162
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
163
struct.pack(b"16s16x", interface))
164
interface_index = struct.unpack("I", ifreq[16:20])[0]
165
return interface_index
166
167
168
def copy_function(func):
169
"""Make a copy of a function"""
170
if sys.version_info.major == 2:
171
return types.FunctionType(func.func_code,
172
func.func_globals,
173
func.func_name,
174
func.func_defaults,
175
func.func_closure)
176
else:
177
return types.FunctionType(func.__code__,
178
func.__globals__,
179
func.__name__,
180
func.__defaults__,
181
func.__closure__)
182
183
184
def initlogger(debug, level=logging.WARNING):
185
"""init logger and add loglevel"""
186
187
global syslogger
188
syslogger = (logging.handlers.SysLogHandler(
189
facility=logging.handlers.SysLogHandler.LOG_DAEMON,
190
address="/dev/log"))
191
syslogger.setFormatter(logging.Formatter
192
("Mandos [%(process)d]: %(levelname)s:"
193
" %(message)s"))
194
logger.addHandler(syslogger)
195
196
if debug:
197
console = logging.StreamHandler()
198
console.setFormatter(logging.Formatter("%(asctime)s %(name)s"
199
" [%(process)d]:"
200
" %(levelname)s:"
201
" %(message)s"))
202
logger.addHandler(console)
203
logger.setLevel(level)
204
205
206
class PGPError(Exception):
207
"""Exception if encryption/decryption fails"""
208
pass
209
210
211
class PGPEngine:
212
"""A simple class for OpenPGP symmetric encryption & decryption"""
213
214
def __init__(self):
215
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
216
self.gpg = "gpg"
217
try:
218
output = subprocess.check_output(["gpgconf"])
219
for line in output.splitlines():
220
name, text, path = line.split(b":")
221
if name == b"gpg":
222
self.gpg = path
223
break
224
except OSError as e:
225
if e.errno != errno.ENOENT:
226
raise
227
self.gnupgargs = ["--batch",
228
"--homedir", self.tempdir,
229
"--force-mdc",
230
"--quiet"]
231
# Only GPG version 1 has the --no-use-agent option.
232
if self.gpg == b"gpg" or self.gpg.endswith(b"/gpg"):
233
self.gnupgargs.append("--no-use-agent")
234
235
def __enter__(self):
236
return self
237
238
def __exit__(self, exc_type, exc_value, traceback):
239
self._cleanup()
240
return False
241
242
def __del__(self):
243
self._cleanup()
244
245
def _cleanup(self):
246
if self.tempdir is not None:
247
# Delete contents of tempdir
248
for root, dirs, files in os.walk(self.tempdir,
249
topdown=False):
250
for filename in files:
251
os.remove(os.path.join(root, filename))
252
for dirname in dirs:
253
os.rmdir(os.path.join(root, dirname))
254
# Remove tempdir
255
os.rmdir(self.tempdir)
256
self.tempdir = None
257
258
def password_encode(self, password):
259
# Passphrase can not be empty and can not contain newlines or
260
# NUL bytes. So we prefix it and hex encode it.
261
encoded = b"mandos" + binascii.hexlify(password)
262
if len(encoded) > 2048:
263
# GnuPG can't handle long passwords, so encode differently
264
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
265
.replace(b"\n", b"\\n")
266
.replace(b"\0", b"\\x00"))
267
return encoded
268
269
def encrypt(self, data, password):
270
passphrase = self.password_encode(password)
271
with tempfile.NamedTemporaryFile(
272
dir=self.tempdir) as passfile:
273
passfile.write(passphrase)
274
passfile.flush()
275
proc = subprocess.Popen([self.gpg, "--symmetric",
276
"--passphrase-file",
277
passfile.name]
278
+ self.gnupgargs,
279
stdin=subprocess.PIPE,
280
stdout=subprocess.PIPE,
281
stderr=subprocess.PIPE)
282
ciphertext, err = proc.communicate(input=data)
283
if proc.returncode != 0:
284
raise PGPError(err)
285
return ciphertext
286
287
def decrypt(self, data, password):
288
passphrase = self.password_encode(password)
289
with tempfile.NamedTemporaryFile(
290
dir=self.tempdir) as passfile:
291
passfile.write(passphrase)
292
passfile.flush()
293
proc = subprocess.Popen([self.gpg, "--decrypt",
294
"--passphrase-file",
295
passfile.name]
296
+ self.gnupgargs,
297
stdin=subprocess.PIPE,
298
stdout=subprocess.PIPE,
299
stderr=subprocess.PIPE)
300
decrypted_plaintext, err = proc.communicate(input=data)
301
if proc.returncode != 0:
302
raise PGPError(err)
303
return decrypted_plaintext
304
305
306
# Pretend that we have an Avahi module
307
class avahi:
308
"""This isn't so much a class as it is a module-like namespace."""
309
IF_UNSPEC = -1 # avahi-common/address.h
310
PROTO_UNSPEC = -1 # avahi-common/address.h
311
PROTO_INET = 0 # avahi-common/address.h
312
PROTO_INET6 = 1 # avahi-common/address.h
313
DBUS_NAME = "org.freedesktop.Avahi"
314
DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"
315
DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"
316
DBUS_PATH_SERVER = "/"
317
318
@staticmethod
319
def string_array_to_txt_array(t):
320
return dbus.Array((dbus.ByteArray(s.encode("utf-8"))
321
for s in t), signature="ay")
322
ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h
323
ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h
324
ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h
325
SERVER_INVALID = 0 # avahi-common/defs.h
326
SERVER_REGISTERING = 1 # avahi-common/defs.h
327
SERVER_RUNNING = 2 # avahi-common/defs.h
328
SERVER_COLLISION = 3 # avahi-common/defs.h
329
SERVER_FAILURE = 4 # avahi-common/defs.h
330
331
332
class AvahiError(Exception):
333
def __init__(self, value, *args, **kwargs):
334
self.value = value
335
return super(AvahiError, self).__init__(value, *args,
336
**kwargs)
337
338
339
class AvahiServiceError(AvahiError):
340
pass
341
342
343
class AvahiGroupError(AvahiError):
344
pass
345
346
347
class AvahiService:
348
"""An Avahi (Zeroconf) service.
349
350
Attributes:
351
interface: integer; avahi.IF_UNSPEC or an interface index.
352
Used to optionally bind to the specified interface.
353
name: string; Example: "Mandos"
354
type: string; Example: "_mandos._tcp".
355
See <https://www.iana.org/assignments/service-names-port-numbers>
356
port: integer; what port to announce
357
TXT: list of strings; TXT record for the service
358
domain: string; Domain to publish on, default to .local if empty.
359
host: string; Host to publish records for, default is localhost
360
max_renames: integer; maximum number of renames
361
rename_count: integer; counter so we only rename after collisions
362
a sensible number of times
363
group: D-Bus Entry Group
364
server: D-Bus Server
365
bus: dbus.SystemBus()
366
"""
367
368
def __init__(self,
369
interface=avahi.IF_UNSPEC,
370
name=None,
371
servicetype=None,
372
port=None,
373
TXT=None,
374
domain="",
375
host="",
376
max_renames=32768,
377
protocol=avahi.PROTO_UNSPEC,
378
bus=None):
379
self.interface = interface
380
self.name = name
381
self.type = servicetype
382
self.port = port
383
self.TXT = TXT if TXT is not None else []
384
self.domain = domain
385
self.host = host
386
self.rename_count = 0
387
self.max_renames = max_renames
388
self.protocol = protocol
389
self.group = None # our entry group
390
self.server = None
391
self.bus = bus
392
self.entry_group_state_changed_match = None
393
394
def rename(self, remove=True):
395
"""Derived from the Avahi example code"""
396
if self.rename_count >= self.max_renames:
397
logger.critical("No suitable Zeroconf service name found"
398
" after %i retries, exiting.",
399
self.rename_count)
400
raise AvahiServiceError("Too many renames")
401
self.name = str(
402
self.server.GetAlternativeServiceName(self.name))
403
self.rename_count += 1
404
logger.info("Changing Zeroconf service name to %r ...",
405
self.name)
406
if remove:
407
self.remove()
408
try:
409
self.add()
410
except dbus.exceptions.DBusException as error:
411
if (error.get_dbus_name()
412
== "org.freedesktop.Avahi.CollisionError"):
413
logger.info("Local Zeroconf service name collision.")
414
return self.rename(remove=False)
415
else:
416
logger.critical("D-Bus Exception", exc_info=error)
417
self.cleanup()
418
os._exit(1)
419
420
def remove(self):
421
"""Derived from the Avahi example code"""
422
if self.entry_group_state_changed_match is not None:
423
self.entry_group_state_changed_match.remove()
424
self.entry_group_state_changed_match = None
425
if self.group is not None:
426
self.group.Reset()
427
428
def add(self):
429
"""Derived from the Avahi example code"""
430
self.remove()
431
if self.group is None:
432
self.group = dbus.Interface(
433
self.bus.get_object(avahi.DBUS_NAME,
434
self.server.EntryGroupNew()),
435
avahi.DBUS_INTERFACE_ENTRY_GROUP)
436
self.entry_group_state_changed_match = (
437
self.group.connect_to_signal(
438
"StateChanged", self.entry_group_state_changed))
439
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
440
self.name, self.type)
441
self.group.AddService(
442
self.interface,
443
self.protocol,
444
dbus.UInt32(0), # flags
445
self.name, self.type,
446
self.domain, self.host,
447
dbus.UInt16(self.port),
448
avahi.string_array_to_txt_array(self.TXT))
449
self.group.Commit()
450
451
def entry_group_state_changed(self, state, error):
452
"""Derived from the Avahi example code"""
453
logger.debug("Avahi entry group state change: %i", state)
454
455
if state == avahi.ENTRY_GROUP_ESTABLISHED:
456
logger.debug("Zeroconf service established.")
457
elif state == avahi.ENTRY_GROUP_COLLISION:
458
logger.info("Zeroconf service name collision.")
459
self.rename()
460
elif state == avahi.ENTRY_GROUP_FAILURE:
461
logger.critical("Avahi: Error in group state changed %s",
462
str(error))
463
raise AvahiGroupError("State changed: {!s}".format(error))
464
465
def cleanup(self):
466
"""Derived from the Avahi example code"""
467
if self.group is not None:
468
try:
469
self.group.Free()
470
except (dbus.exceptions.UnknownMethodException,
471
dbus.exceptions.DBusException):
472
pass
473
self.group = None
474
self.remove()
475
476
def server_state_changed(self, state, error=None):
477
"""Derived from the Avahi example code"""
478
logger.debug("Avahi server state change: %i", state)
479
bad_states = {
480
avahi.SERVER_INVALID: "Zeroconf server invalid",
481
avahi.SERVER_REGISTERING: None,
482
avahi.SERVER_COLLISION: "Zeroconf server name collision",
483
avahi.SERVER_FAILURE: "Zeroconf server failure",
484
}
485
if state in bad_states:
486
if bad_states[state] is not None:
487
if error is None:
488
logger.error(bad_states[state])
489
else:
490
logger.error(bad_states[state] + ": %r", error)
491
self.cleanup()
492
elif state == avahi.SERVER_RUNNING:
493
try:
494
self.add()
495
except dbus.exceptions.DBusException as error:
496
if (error.get_dbus_name()
497
== "org.freedesktop.Avahi.CollisionError"):
498
logger.info("Local Zeroconf service name"
499
" collision.")
500
return self.rename(remove=False)
501
else:
502
logger.critical("D-Bus Exception", exc_info=error)
503
self.cleanup()
504
os._exit(1)
505
else:
506
if error is None:
507
logger.debug("Unknown state: %r", state)
508
else:
509
logger.debug("Unknown state: %r: %r", state, error)
510
511
def activate(self):
512
"""Derived from the Avahi example code"""
513
if self.server is None:
514
self.server = dbus.Interface(
515
self.bus.get_object(avahi.DBUS_NAME,
516
avahi.DBUS_PATH_SERVER,
517
follow_name_owner_changes=True),
518
avahi.DBUS_INTERFACE_SERVER)
519
self.server.connect_to_signal("StateChanged",
520
self.server_state_changed)
521
self.server_state_changed(self.server.GetState())
522
523
524
class AvahiServiceToSyslog(AvahiService):
525
def rename(self, *args, **kwargs):
526
"""Add the new name to the syslog messages"""
527
ret = super(AvahiServiceToSyslog, self).rename(*args,
528
**kwargs)
529
syslogger.setFormatter(logging.Formatter(
530
"Mandos ({}) [%(process)d]: %(levelname)s: %(message)s"
531
.format(self.name)))
532
return ret
533
534
535
# Pretend that we have a GnuTLS module
536
class gnutls:
537
"""This isn't so much a class as it is a module-like namespace."""
538
539
library = ctypes.util.find_library("gnutls")
540
if library is None:
541
library = ctypes.util.find_library("gnutls-deb0")
542
_library = ctypes.cdll.LoadLibrary(library)
543
del library
544
545
# Unless otherwise indicated, the constants and types below are
546
# all from the gnutls/gnutls.h C header file.
547
548
# Constants
549
E_SUCCESS = 0
550
E_INTERRUPTED = -52
551
E_AGAIN = -28
552
CRT_OPENPGP = 2
553
CRT_RAWPK = 3
554
CLIENT = 2
555
SHUT_RDWR = 0
556
CRD_CERTIFICATE = 1
557
E_NO_CERTIFICATE_FOUND = -49
558
X509_FMT_DER = 0
559
NO_TICKETS = 1<<10
560
ENABLE_RAWPK = 1<<18
561
CTYPE_PEERS = 3
562
KEYID_USE_SHA256 = 1 # gnutls/x509.h
563
OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
564
565
# Types
566
class _session_int(ctypes.Structure):
567
_fields_ = []
568
session_t = ctypes.POINTER(_session_int)
569
570
class certificate_credentials_st(ctypes.Structure):
571
_fields_ = []
572
certificate_credentials_t = ctypes.POINTER(
573
certificate_credentials_st)
574
certificate_type_t = ctypes.c_int
575
576
class datum_t(ctypes.Structure):
577
_fields_ = [("data", ctypes.POINTER(ctypes.c_ubyte)),
578
("size", ctypes.c_uint)]
579
580
class _openpgp_crt_int(ctypes.Structure):
581
_fields_ = []
582
openpgp_crt_t = ctypes.POINTER(_openpgp_crt_int)
583
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
584
log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
585
credentials_type_t = ctypes.c_int
586
transport_ptr_t = ctypes.c_void_p
587
close_request_t = ctypes.c_int
588
589
# Exceptions
590
class Error(Exception):
591
def __init__(self, message=None, code=None, args=()):
592
# Default usage is by a message string, but if a return
593
# code is passed, convert it to a string with
594
# gnutls.strerror()
595
self.code = code
596
if message is None and code is not None:
597
message = gnutls.strerror(code).decode(
598
"utf-8", errors="replace")
599
return super(gnutls.Error, self).__init__(
600
message, *args)
601
602
class CertificateSecurityError(Error):
603
pass
604
605
class PointerTo:
606
def __init__(self, cls):
607
self.cls = cls
608
609
def from_param(self, obj):
610
if not isinstance(obj, self.cls):
611
raise TypeError("Not of type {}: {!r}"
612
.format(self.cls.__name__, obj))
613
return ctypes.byref(obj.from_param(obj))
614
615
class CastToVoidPointer:
616
def __init__(self, cls):
617
self.cls = cls
618
619
def from_param(self, obj):
620
if not isinstance(obj, self.cls):
621
raise TypeError("Not of type {}: {!r}"
622
.format(self.cls.__name__, obj))
623
return ctypes.cast(obj.from_param(obj), ctypes.c_void_p)
624
625
class With_from_param:
626
@classmethod
627
def from_param(cls, obj):
628
return obj._as_parameter_
629
630
# Classes
631
class Credentials(With_from_param):
632
def __init__(self):
633
self._as_parameter_ = gnutls.certificate_credentials_t()
634
gnutls.certificate_allocate_credentials(self)
635
self.type = gnutls.CRD_CERTIFICATE
636
637
def __del__(self):
638
gnutls.certificate_free_credentials(self)
639
640
class ClientSession(With_from_param):
641
def __init__(self, socket, credentials=None):
642
self._as_parameter_ = gnutls.session_t()
643
gnutls_flags = gnutls.CLIENT
644
if gnutls.check_version(b"3.5.6"):
645
gnutls_flags |= gnutls.NO_TICKETS
646
if gnutls.has_rawpk:
647
gnutls_flags |= gnutls.ENABLE_RAWPK
648
gnutls.init(self, gnutls_flags)
649
del gnutls_flags
650
gnutls.set_default_priority(self)
651
gnutls.transport_set_ptr(self, socket.fileno())
652
gnutls.handshake_set_private_extensions(self, True)
653
self.socket = socket
654
if credentials is None:
655
credentials = gnutls.Credentials()
656
gnutls.credentials_set(self, credentials.type,
657
credentials)
658
self.credentials = credentials
659
660
def __del__(self):
661
gnutls.deinit(self)
662
663
def handshake(self):
664
return gnutls.handshake(self)
665
666
def send(self, data):
667
data = bytes(data)
668
data_len = len(data)
669
while data_len > 0:
670
data_len -= gnutls.record_send(self, data[-data_len:],
671
data_len)
672
673
def bye(self):
674
return gnutls.bye(self, gnutls.SHUT_RDWR)
675
676
# Error handling functions
677
def _error_code(result):
678
"""A function to raise exceptions on errors, suitable
679
for the "restype" attribute on ctypes functions"""
680
if result >= gnutls.E_SUCCESS:
681
return result
682
if result == gnutls.E_NO_CERTIFICATE_FOUND:
683
raise gnutls.CertificateSecurityError(code=result)
684
raise gnutls.Error(code=result)
685
686
def _retry_on_error(result, func, arguments,
687
_error_code=_error_code):
688
"""A function to retry on some errors, suitable
689
for the "errcheck" attribute on ctypes functions"""
690
while result < gnutls.E_SUCCESS:
691
if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
692
return _error_code(result)
693
result = func(*arguments)
694
return result
695
696
# Unless otherwise indicated, the function declarations below are
697
# all from the gnutls/gnutls.h C header file.
698
699
# Functions
700
priority_set_direct = _library.gnutls_priority_set_direct
701
priority_set_direct.argtypes = [ClientSession, ctypes.c_char_p,
702
ctypes.POINTER(ctypes.c_char_p)]
703
priority_set_direct.restype = _error_code
704
705
init = _library.gnutls_init
706
init.argtypes = [PointerTo(ClientSession), ctypes.c_int]
707
init.restype = _error_code
708
709
set_default_priority = _library.gnutls_set_default_priority
710
set_default_priority.argtypes = [ClientSession]
711
set_default_priority.restype = _error_code
712
713
record_send = _library.gnutls_record_send
714
record_send.argtypes = [ClientSession, ctypes.c_void_p,
715
ctypes.c_size_t]
716
record_send.restype = ctypes.c_ssize_t
717
record_send.errcheck = _retry_on_error
718
719
certificate_allocate_credentials = (
720
_library.gnutls_certificate_allocate_credentials)
721
certificate_allocate_credentials.argtypes = [
722
PointerTo(Credentials)]
723
certificate_allocate_credentials.restype = _error_code
724
725
certificate_free_credentials = (
726
_library.gnutls_certificate_free_credentials)
727
certificate_free_credentials.argtypes = [Credentials]
728
certificate_free_credentials.restype = None
729
730
handshake_set_private_extensions = (
731
_library.gnutls_handshake_set_private_extensions)
732
handshake_set_private_extensions.argtypes = [ClientSession,
733
ctypes.c_int]
734
handshake_set_private_extensions.restype = None
735
736
credentials_set = _library.gnutls_credentials_set
737
credentials_set.argtypes = [ClientSession, credentials_type_t,
738
CastToVoidPointer(Credentials)]
739
credentials_set.restype = _error_code
740
741
strerror = _library.gnutls_strerror
742
strerror.argtypes = [ctypes.c_int]
743
strerror.restype = ctypes.c_char_p
744
745
certificate_type_get = _library.gnutls_certificate_type_get
746
certificate_type_get.argtypes = [ClientSession]
747
certificate_type_get.restype = _error_code
748
749
certificate_get_peers = _library.gnutls_certificate_get_peers
750
certificate_get_peers.argtypes = [ClientSession,
751
ctypes.POINTER(ctypes.c_uint)]
752
certificate_get_peers.restype = ctypes.POINTER(datum_t)
753
754
global_set_log_level = _library.gnutls_global_set_log_level
755
global_set_log_level.argtypes = [ctypes.c_int]
756
global_set_log_level.restype = None
757
758
global_set_log_function = _library.gnutls_global_set_log_function
759
global_set_log_function.argtypes = [log_func]
760
global_set_log_function.restype = None
761
762
deinit = _library.gnutls_deinit
763
deinit.argtypes = [ClientSession]
764
deinit.restype = None
765
766
handshake = _library.gnutls_handshake
767
handshake.argtypes = [ClientSession]
768
handshake.restype = ctypes.c_int
769
handshake.errcheck = _retry_on_error
770
771
transport_set_ptr = _library.gnutls_transport_set_ptr
772
transport_set_ptr.argtypes = [ClientSession, transport_ptr_t]
773
transport_set_ptr.restype = None
774
775
bye = _library.gnutls_bye
776
bye.argtypes = [ClientSession, close_request_t]
777
bye.restype = ctypes.c_int
778
bye.errcheck = _retry_on_error
779
780
check_version = _library.gnutls_check_version
781
check_version.argtypes = [ctypes.c_char_p]
782
check_version.restype = ctypes.c_char_p
783
784
_need_version = b"3.3.0"
785
if check_version(_need_version) is None:
786
raise self.Error("Needs GnuTLS {} or later"
787
.format(_need_version))
788
789
_tls_rawpk_version = b"3.6.6"
790
has_rawpk = bool(check_version(_tls_rawpk_version))
791
792
if has_rawpk:
793
# Types
794
class pubkey_st(ctypes.Structure):
795
_fields = []
796
pubkey_t = ctypes.POINTER(pubkey_st)
797
798
x509_crt_fmt_t = ctypes.c_int
799
800
# All the function declarations below are from
801
# gnutls/abstract.h
802
pubkey_init = _library.gnutls_pubkey_init
803
pubkey_init.argtypes = [ctypes.POINTER(pubkey_t)]
804
pubkey_init.restype = _error_code
805
806
pubkey_import = _library.gnutls_pubkey_import
807
pubkey_import.argtypes = [pubkey_t, ctypes.POINTER(datum_t),
808
x509_crt_fmt_t]
809
pubkey_import.restype = _error_code
810
811
pubkey_get_key_id = _library.gnutls_pubkey_get_key_id
812
pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,
813
ctypes.POINTER(ctypes.c_ubyte),
814
ctypes.POINTER(ctypes.c_size_t)]
815
pubkey_get_key_id.restype = _error_code
816
817
pubkey_deinit = _library.gnutls_pubkey_deinit
818
pubkey_deinit.argtypes = [pubkey_t]
819
pubkey_deinit.restype = None
820
else:
821
# All the function declarations below are from
822
# gnutls/openpgp.h
823
824
openpgp_crt_init = _library.gnutls_openpgp_crt_init
825
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
826
openpgp_crt_init.restype = _error_code
827
828
openpgp_crt_import = _library.gnutls_openpgp_crt_import
829
openpgp_crt_import.argtypes = [openpgp_crt_t,
830
ctypes.POINTER(datum_t),
831
openpgp_crt_fmt_t]
832
openpgp_crt_import.restype = _error_code
833
834
openpgp_crt_verify_self = \
835
_library.gnutls_openpgp_crt_verify_self
836
openpgp_crt_verify_self.argtypes = [
837
openpgp_crt_t,
838
ctypes.c_uint,
839
ctypes.POINTER(ctypes.c_uint),
840
]
841
openpgp_crt_verify_self.restype = _error_code
842
843
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
844
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
845
openpgp_crt_deinit.restype = None
846
847
openpgp_crt_get_fingerprint = (
848
_library.gnutls_openpgp_crt_get_fingerprint)
849
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
850
ctypes.c_void_p,
851
ctypes.POINTER(
852
ctypes.c_size_t)]
853
openpgp_crt_get_fingerprint.restype = _error_code
854
855
if check_version(b"3.6.4"):
856
certificate_type_get2 = _library.gnutls_certificate_type_get2
857
certificate_type_get2.argtypes = [ClientSession, ctypes.c_int]
858
certificate_type_get2.restype = _error_code
859
860
# Remove non-public functions
861
del _error_code, _retry_on_error
862
863
864
def call_pipe(connection, # : multiprocessing.Connection
865
func, *args, **kwargs):
866
"""This function is meant to be called by multiprocessing.Process
867
868
This function runs func(*args, **kwargs), and writes the resulting
869
return value on the provided multiprocessing.Connection.
870
"""
871
connection.send(func(*args, **kwargs))
872
connection.close()
873
874
875
class Client:
30
31
import logging
32
import logging.handlers
33
34
# logghandler.setFormatter(logging.Formatter('%(levelname)s %(message)s')
35
36
logger = logging.Logger('mandos')
37
logger.addHandler(logging.handlers.SysLogHandler(facility = logging.handlers.SysLogHandler.LOG_DAEMON))
38
39
# This variable is used to optionally bind to a specified interface.
40
# It is a global variable to fit in with the other variables from the
41
# Avahi server example code.
42
serviceInterface = avahi.IF_UNSPEC
43
# From the Avahi server example code:
44
serviceName = "Mandos"
45
serviceType = "_mandos._tcp" # http://www.dns-sd.org/ServiceTypes.html
46
servicePort = None # Not known at startup
47
serviceTXT = [] # TXT record for the service
48
domain = "" # Domain to publish on, default to .local
49
host = "" # Host to publish records for, default to localhost
50
group = None #our entry group
51
rename_count = 12 # Counter so we only rename after collisions a
52
# sensible number of times
53
# End of Avahi example code
54
55
56
class Client(object):
876
57
"""A representation of a client host served by this server.
877
878
58
Attributes:
879
approved: bool(); None if not yet approved/disapproved
880
approval_delay: datetime.timedelta(); Time to wait for approval
881
approval_duration: datetime.timedelta(); Duration of one approval
882
checker: multiprocessing.Process(); a running checker process used
883
to see if the client lives. None if no process is
884
running.
885
checker_callback_tag: a GLib event source tag, or None
886
checker_command: string; External command which is run to check
887
if client lives. %() expansions are done at
59
name: string; from the config file, used in log messages
60
fingerprint: string (40 or 32 hexadecimal digits); used to
61
uniquely identify the client
62
secret: bytestring; sent verbatim (over TLS) to client
63
fqdn: string (FQDN); available for use by the checker command
64
created: datetime.datetime()
65
last_seen: datetime.datetime() or None if not yet seen
66
timeout: datetime.timedelta(); How long from last_seen until
67
this client is invalid
68
interval: datetime.timedelta(); How often to start a new checker
69
stop_hook: If set, called by stop() as stop_hook(self)
70
checker: subprocess.Popen(); a running checker process used
71
to see if the client lives.
72
Is None if no process is running.
73
checker_initiator_tag: a gobject event source tag, or None
74
stop_initiator_tag: - '' -
75
checker_callback_tag: - '' -
76
checker_command: string; External command which is run to check if
77
client lives. %()s expansions are done at
888
78
runtime with vars(self) as dict, so that for
889
79
instance %(name)s can be used in the command.
890
checker_initiator_tag: a GLib event source tag, or None
891
created: datetime.datetime(); (UTC) object creation
892
client_structure: Object describing what attributes a client has
893
and is used for storing the client at exit
894
current_checker_command: string; current running checker_command
895
disable_initiator_tag: a GLib event source tag, or None
896
enabled: bool()
897
fingerprint: string (40 or 32 hexadecimal digits); used to
898
uniquely identify an OpenPGP client
899
key_id: string (64 hexadecimal digits); used to uniquely identify
900
a client using raw public keys
901
host: string; available for use by the checker command
902
interval: datetime.timedelta(); How often to start a new checker
903
last_approval_request: datetime.datetime(); (UTC) or None
904
last_checked_ok: datetime.datetime(); (UTC) or None
905
last_checker_status: integer between 0 and 255 reflecting exit
906
status of last checker. -1 reflects crashed
907
checker, -2 means no checker completed yet.
908
last_checker_signal: The signal which killed the last checker, if
909
last_checker_status is -1
910
last_enabled: datetime.datetime(); (UTC) or None
911
name: string; from the config file, used in log messages and
912
D-Bus identifiers
913
secret: bytestring; sent verbatim (over TLS) to client
914
timeout: datetime.timedelta(); How long from last_checked_ok
915
until this client is disabled
916
extended_timeout: extra long timeout when secret has been sent
917
runtime_expansions: Allowed attributes for runtime expansion.
918
expires: datetime.datetime(); time (UTC) when a client will be
919
disabled, or None
920
server_settings: The server_settings dict from main()
80
Private attibutes:
81
_timeout: Real variable for 'timeout'
82
_interval: Real variable for 'interval'
83
_timeout_milliseconds: Used by gobject.timeout_add()
84
_interval_milliseconds: - '' -
921
85
"""
922
923
runtime_expansions = ("approval_delay", "approval_duration",
924
"created", "enabled", "expires", "key_id",
925
"fingerprint", "host", "interval",
926
"last_approval_request", "last_checked_ok",
927
"last_enabled", "name", "timeout")
928
client_defaults = {
929
"timeout": "PT5M",
930
"extended_timeout": "PT15M",
931
"interval": "PT2M",
932
"checker": "fping -q -- %%(host)s",
933
"host": "",
934
"approval_delay": "PT0S",
935
"approval_duration": "PT1S",
936
"approved_by_default": "True",
937
"enabled": "True",
938
}
939
940
@staticmethod
941
def config_parser(config):
942
"""Construct a new dict of client settings of this form:
943
{ client_name: {setting_name: value, ...}, ...}
944
with exceptions for any special settings as defined above.
945
NOTE: Must be a pure function. Must return the same result
946
value given the same arguments.
947
"""
948
settings = {}
949
for client_name in config.sections():
950
section = dict(config.items(client_name))
951
client = settings[client_name] = {}
952
953
client["host"] = section["host"]
954
# Reformat values from string types to Python types
955
client["approved_by_default"] = config.getboolean(
956
client_name, "approved_by_default")
957
client["enabled"] = config.getboolean(client_name,
958
"enabled")
959
960
# Uppercase and remove spaces from key_id and fingerprint
961
# for later comparison purposes with return value from the
962
# key_id() and fingerprint() functions
963
client["key_id"] = (section.get("key_id", "").upper()
964
.replace(" ", ""))
965
client["fingerprint"] = (section["fingerprint"].upper()
966
.replace(" ", ""))
967
if "secret" in section:
968
client["secret"] = codecs.decode(section["secret"]
969
.encode("utf-8"),
970
"base64")
971
elif "secfile" in section:
972
with open(os.path.expanduser(os.path.expandvars
973
(section["secfile"])),
974
"rb") as secfile:
975
client["secret"] = secfile.read()
976
else:
977
raise TypeError("No secret or secfile for section {}"
978
.format(section))
979
client["timeout"] = string_to_delta(section["timeout"])
980
client["extended_timeout"] = string_to_delta(
981
section["extended_timeout"])
982
client["interval"] = string_to_delta(section["interval"])
983
client["approval_delay"] = string_to_delta(
984
section["approval_delay"])
985
client["approval_duration"] = string_to_delta(
986
section["approval_duration"])
987
client["checker_command"] = section["checker"]
988
client["last_approval_request"] = None
989
client["last_checked_ok"] = None
990
client["last_checker_status"] = -2
991
992
return settings
993
994
def __init__(self, settings, name=None, server_settings=None):
86
def _set_timeout(self, timeout):
87
"Setter function for 'timeout' attribute"
88
self._timeout = timeout
89
self._timeout_milliseconds = ((self.timeout.days
90
* 24 * 60 * 60 * 1000)
91
+ (self.timeout.seconds * 1000)
92
+ (self.timeout.microseconds
93
// 1000))
94
timeout = property(lambda self: self._timeout,
95
_set_timeout)
96
del _set_timeout
97
def _set_interval(self, interval):
98
"Setter function for 'interval' attribute"
99
self._interval = interval
100
self._interval_milliseconds = ((self.interval.days
101
* 24 * 60 * 60 * 1000)
102
+ (self.interval.seconds
103
* 1000)
104
+ (self.interval.microseconds
105
// 1000))
106
interval = property(lambda self: self._interval,
107
_set_interval)
108
del _set_interval
109
def __init__(self, name=None, options=None, stop_hook=None,
110
fingerprint=None, secret=None, secfile=None, fqdn=None,
111
timeout=None, interval=-1, checker=None):
995
112
self.name = name
996
if server_settings is None:
997
server_settings = {}
998
self.server_settings = server_settings
999
# adding all client settings
1000
for setting, value in settings.items():
1001
setattr(self, setting, value)
1002
1003
if self.enabled:
1004
if not hasattr(self, "last_enabled"):
1005
self.last_enabled = datetime.datetime.utcnow()
1006
if not hasattr(self, "expires"):
1007
self.expires = (datetime.datetime.utcnow()
1008
+ self.timeout)
1009
else:
1010
self.last_enabled = None
1011
self.expires = None
1012
1013
logger.debug("Creating client %r", self.name)
1014
logger.debug(" Key ID: %s", self.key_id)
1015
logger.debug(" Fingerprint: %s", self.fingerprint)
1016
self.created = settings.get("created",
1017
datetime.datetime.utcnow())
1018
1019
# attributes specific for this server instance
113
# Uppercase and remove spaces from fingerprint
114
# for later comparison purposes with return value of
115
# the fingerprint() function
116
self.fingerprint = fingerprint.upper().replace(u" ", u"")
117
if secret:
118
self.secret = secret.decode(u"base64")
119
elif secfile:
120
sf = open(secfile)
121
self.secret = sf.read()
122
sf.close()
123
else:
124
raise RuntimeError(u"No secret or secfile for client %s"
125
% self.name)
126
self.fqdn = fqdn # string
127
self.created = datetime.datetime.now()
128
self.last_seen = None
129
if timeout is None:
130
timeout = options.timeout
131
self.timeout = timeout
132
if interval == -1:
133
interval = options.interval
134
else:
135
interval = string_to_delta(interval)
136
self.interval = interval
137
self.stop_hook = stop_hook
1020
138
self.checker = None
1021
139
self.checker_initiator_tag = None
1022
self.disable_initiator_tag = None
140
self.stop_initiator_tag = None
1023
141
self.checker_callback_tag = None
1024
self.current_checker_command = None
1025
self.approved = None
1026
self.approvals_pending = 0
1027
self.changedstate = multiprocessing_manager.Condition(
1028
multiprocessing_manager.Lock())
1029
self.client_structure = [attr
1030
for attr in self.__dict__.keys()
1031
if not attr.startswith("_")]
1032
self.client_structure.append("client_structure")
1033
1034
for name, t in inspect.getmembers(
1035
type(self), lambda obj: isinstance(obj, property)):
1036
if not name.startswith("_"):
1037
self.client_structure.append(name)
1038
1039
# Send notice to process children that client state has changed
1040
def send_changedstate(self):
1041
with self.changedstate:
1042
self.changedstate.notify_all()
1043
1044
def enable(self):
1045
"""Start this client's checker and timeout hooks"""
1046
if getattr(self, "enabled", False):
1047
# Already enabled
1048
return
1049
self.expires = datetime.datetime.utcnow() + self.timeout
1050
self.enabled = True
1051
self.last_enabled = datetime.datetime.utcnow()
1052
self.init_checker()
1053
self.send_changedstate()
1054
1055
def disable(self, quiet=True):
1056
"""Disable this client."""
1057
if not getattr(self, "enabled", False):
1058
return False
1059
if not quiet:
1060
logger.info("Disabling client %s", self.name)
1061
if getattr(self, "disable_initiator_tag", None) is not None:
1062
GLib.source_remove(self.disable_initiator_tag)
1063
self.disable_initiator_tag = None
1064
self.expires = None
1065
if getattr(self, "checker_initiator_tag", None) is not None:
1066
GLib.source_remove(self.checker_initiator_tag)
1067
self.checker_initiator_tag = None
1068
self.stop_checker()
1069
self.enabled = False
1070
if not quiet:
1071
self.send_changedstate()
1072
# Do not run this again if called by a GLib.timeout_add
1073
return False
1074
1075
def __del__(self):
1076
self.disable()
1077
1078
def init_checker(self):
142
self.check_command = checker
143
def start(self):
144
"""Start this clients checker and timeout hooks"""
1079
145
# Schedule a new checker to be started an 'interval' from now,
1080
146
# and every interval from then on.
1081
if self.checker_initiator_tag is not None:
1082
GLib.source_remove(self.checker_initiator_tag)
1083
self.checker_initiator_tag = GLib.timeout_add(
1084
random.randrange(int(self.interval.total_seconds() * 1000
1085
+ 1)),
1086
self.start_checker)
1087
# Schedule a disable() when 'timeout' has passed
1088
if self.disable_initiator_tag is not None:
1089
GLib.source_remove(self.disable_initiator_tag)
1090
self.disable_initiator_tag = GLib.timeout_add(
1091
int(self.timeout.total_seconds() * 1000), self.disable)
147
self.checker_initiator_tag = gobject.timeout_add\
148
(self._interval_milliseconds,
149
self.start_checker)
1092
150
# Also start a new checker *right now*.
1093
151
self.start_checker()
1094
1095
def checker_callback(self, source, condition, connection,
1096
command):
152
# Schedule a stop() when 'timeout' has passed
153
self.stop_initiator_tag = gobject.timeout_add\
154
(self._timeout_milliseconds,
155
self.stop)
156
def stop(self):
157
"""Stop this client.
158
The possibility that this client might be restarted is left
159
open, but not currently used."""
160
logger.debug(u"Stopping client %s", self.name)
161
self.secret = None
162
if self.stop_initiator_tag:
163
gobject.source_remove(self.stop_initiator_tag)
164
self.stop_initiator_tag = None
165
if self.checker_initiator_tag:
166
gobject.source_remove(self.checker_initiator_tag)
167
self.checker_initiator_tag = None
168
self.stop_checker()
169
if self.stop_hook:
170
self.stop_hook(self)
171
# Do not run this again if called by a gobject.timeout_add
172
return False
173
def __del__(self):
174
# Some code duplication here and in stop()
175
if hasattr(self, "stop_initiator_tag") \
176
and self.stop_initiator_tag:
177
gobject.source_remove(self.stop_initiator_tag)
178
self.stop_initiator_tag = None
179
if hasattr(self, "checker_initiator_tag") \
180
and self.checker_initiator_tag:
181
gobject.source_remove(self.checker_initiator_tag)
182
self.checker_initiator_tag = None
183
self.stop_checker()
184
def checker_callback(self, pid, condition):
1097
185
"""The checker has completed, so take appropriate actions."""
1098
# Read return code from connection (see call_pipe)
1099
returncode = connection.recv()
1100
connection.close()
1101
if self.checker is not None:
1102
self.checker.join()
1103
self.checker_callback_tag = None
1104
self.checker = None
1105
1106
if returncode >= 0:
1107
self.last_checker_status = returncode
1108
self.last_checker_signal = None
1109
if self.last_checker_status == 0:
1110
logger.info("Checker for %(name)s succeeded",
1111
vars(self))
1112
self.checked_ok()
1113
else:
1114
logger.info("Checker for %(name)s failed", vars(self))
1115
else:
1116
self.last_checker_status = -1
1117
self.last_checker_signal = -returncode
1118
logger.warning("Checker for %(name)s crashed?",
186
now = datetime.datetime.now()
187
if os.WIFEXITED(condition) \
188
and (os.WEXITSTATUS(condition) == 0):
189
logger.debug(u"Checker for %(name)s succeeded",
190
vars(self))
191
self.last_seen = now
192
gobject.source_remove(self.stop_initiator_tag)
193
self.stop_initiator_tag = gobject.timeout_add\
194
(self._timeout_milliseconds,
195
self.stop)
196
if not os.WIFEXITED(condition):
197
logger.warning(u"Checker for %(name)s crashed?",
1119
198
vars(self))
1120
return False
1121
1122
def checked_ok(self):
1123
"""Assert that the client has been seen, alive and well."""
1124
self.last_checked_ok = datetime.datetime.utcnow()
1125
self.last_checker_status = 0
1126
self.last_checker_signal = None
1127
self.bump_timeout()
1128
1129
def bump_timeout(self, timeout=None):
1130
"""Bump up the timeout for this client."""
1131
if timeout is None:
1132
timeout = self.timeout
1133
if self.disable_initiator_tag is not None:
1134
GLib.source_remove(self.disable_initiator_tag)
1135
self.disable_initiator_tag = None
1136
if getattr(self, "enabled", False):
1137
self.disable_initiator_tag = GLib.timeout_add(
1138
int(timeout.total_seconds() * 1000), self.disable)
1139
self.expires = datetime.datetime.utcnow() + timeout
1140
1141
def need_approval(self):
1142
self.last_approval_request = datetime.datetime.utcnow()
1143
199
else:
200
logger.debug(u"Checker for %(name)s failed",
201
vars(self))
202
self.checker = None
203
self.checker_callback_tag = None
1144
204
def start_checker(self):
1145
205
"""Start a new checker subprocess if one is not running.
1146
1147
206
If a checker already exists, leave it running and do
1148
207
nothing."""
1149
# The reason for not killing a running checker is that if we
1150
# did that, and if a checker (for some reason) started running
1151
# slowly and taking more than 'interval' time, then the client
1152
# would inevitably timeout, since no checker would get a
1153
# chance to run to completion. If we instead leave running
1154
# checkers alone, the checker would have to take more time
1155
# than 'timeout' for the client to be disabled, which is as it
1156
# should be.
1157
1158
if self.checker is not None and not self.checker.is_alive():
1159
logger.warning("Checker was not alive; joining")
1160
self.checker.join()
1161
self.checker = None
1162
# Start a new checker if needed
1163
208
if self.checker is None:
1164
# Escape attributes for the shell
1165
escaped_attrs = {
1166
attr: shlex.quote(str(getattr(self, attr)))
1167
for attr in self.runtime_expansions}
1168
try:
1169
command = self.checker_command % escaped_attrs
1170
except TypeError as error:
1171
logger.error('Could not format string "%s"',
1172
self.checker_command,
1173
exc_info=error)
1174
return True # Try again later
1175
self.current_checker_command = command
1176
logger.info("Starting checker %r for %s", command,
1177
self.name)
1178
# We don't need to redirect stdout and stderr, since
1179
# in normal mode, that is already done by daemon(),
1180
# and in debug mode we don't want to. (Stdin is
1181
# always replaced by /dev/null.)
1182
# The exception is when not debugging but nevertheless
1183
# running in the foreground; use the previously
1184
# created wnull.
1185
popen_args = {"close_fds": True,
1186
"shell": True,
1187
"cwd": "/"}
1188
if (not self.server_settings["debug"]
1189
and self.server_settings["foreground"]):
1190
popen_args.update({"stdout": wnull,
1191
"stderr": wnull})
1192
pipe = multiprocessing.Pipe(duplex=False)
1193
self.checker = multiprocessing.Process(
1194
target=call_pipe,
1195
args=(pipe[1], subprocess.call, command),
1196
kwargs=popen_args)
1197
self.checker.start()
1198
self.checker_callback_tag = GLib.io_add_watch(
1199
GLib.IOChannel.unix_new(pipe[0].fileno()),
1200
GLib.PRIORITY_DEFAULT, GLib.IO_IN,
1201
self.checker_callback, pipe[0], command)
1202
# Re-run this periodically if run by GLib.timeout_add
209
logger.debug(u"Starting checker for %s",
210
self.name)
211
try:
212
command = self.check_command % self.fqdn
213
except TypeError:
214
escaped_attrs = dict((key, re.escape(str(val)))
215
for key, val in
216
vars(self).iteritems())
217
try:
218
command = self.check_command % escaped_attrs
219
except TypeError, error:
220
logger.critical(u'Could not format string "%s": %s',
221
self.check_command, error)
222
return True # Try again later
223
try:
224
self.checker = subprocess.\
225
Popen(command,
226
stdout=subprocess.PIPE,
227
close_fds=True, shell=True,
228
cwd="/")
229
self.checker_callback_tag = gobject.\
230
child_watch_add(self.checker.pid,
231
self.\
232
checker_callback)
233
except subprocess.OSError, error:
234
logger.error(u"Failed to start subprocess: %s",
235
error)
236
# Re-run this periodically if run by gobject.timeout_add
1203
237
return True
1204
1205
238
def stop_checker(self):
1206
239
"""Force the checker process, if any, to stop."""
1207
if self.checker_callback_tag:
1208
GLib.source_remove(self.checker_callback_tag)
1209
self.checker_callback_tag = None
1210
if getattr(self, "checker", None) is None:
240
if not hasattr(self, "checker") or self.checker is None:
1211
241
return
1212
logger.debug("Stopping checker for %(name)s", vars(self))
1213
self.checker.terminate()
242
gobject.source_remove(self.checker_callback_tag)
243
self.checker_callback_tag = None
244
os.kill(self.checker.pid, signal.SIGTERM)
245
if self.checker.poll() is None:
246
os.kill(self.checker.pid, signal.SIGKILL)
1214
247
self.checker = None
1215
1216
1217
def dbus_service_property(dbus_interface,
1218
signature="v",
1219
access="readwrite",
1220
byte_arrays=False):
1221
"""Decorators for marking methods of a DBusObjectWithProperties to
1222
become properties on the D-Bus.
1223
1224
The decorated method will be called with no arguments by "Get"
1225
and with one argument by "Set".
1226
1227
The parameters, where they are supported, are the same as
1228
dbus.service.method, except there is only "signature", since the
1229
type from Get() and the type sent to Set() is the same.
1230
"""
1231
# Encoding deeply encoded byte arrays is not supported yet by the
1232
# "Set" method, so we fail early here:
1233
if byte_arrays and signature != "ay":
1234
raise ValueError("Byte arrays not supported for non-'ay'"
1235
" signature {!r}".format(signature))
1236
1237
def decorator(func):
1238
func._dbus_is_property = True
1239
func._dbus_interface = dbus_interface
1240
func._dbus_signature = signature
1241
func._dbus_access = access
1242
func._dbus_name = func.__name__
1243
if func._dbus_name.endswith("_dbus_property"):
1244
func._dbus_name = func._dbus_name[:-14]
1245
func._dbus_get_args_options = {"byte_arrays": byte_arrays}
1246
return func
1247
1248
return decorator
1249
1250
1251
def dbus_interface_annotations(dbus_interface):
1252
"""Decorator for marking functions returning interface annotations
1253
1254
Usage:
1255
1256
@dbus_interface_annotations("org.example.Interface")
1257
def _foo(self): # Function name does not matter
1258
return {"org.freedesktop.DBus.Deprecated": "true",
1259
"org.freedesktop.DBus.Property.EmitsChangedSignal":
1260
"false"}
1261
"""
1262
1263
def decorator(func):
1264
func._dbus_is_interface = True
1265
func._dbus_interface = dbus_interface
1266
func._dbus_name = dbus_interface
1267
return func
1268
1269
return decorator
1270
1271
1272
def dbus_annotations(annotations):
1273
"""Decorator to annotate D-Bus methods, signals or properties
1274
Usage:
1275
1276
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
1277
"org.freedesktop.DBus.Property."
1278
"EmitsChangedSignal": "false"})
1279
@dbus_service_property("org.example.Interface", signature="b",
1280
access="r")
1281
def Property_dbus_property(self):
1282
return dbus.Boolean(False)
1283
1284
See also the DBusObjectWithAnnotations class.
1285
"""
1286
1287
def decorator(func):
1288
func._dbus_annotations = annotations
1289
return func
1290
1291
return decorator
1292
1293
1294
class DBusPropertyException(dbus.exceptions.DBusException):
1295
"""A base class for D-Bus property-related exceptions
1296
"""
1297
pass
1298
1299
1300
class DBusPropertyAccessException(DBusPropertyException):
1301
"""A property's access permissions disallows an operation.
1302
"""
1303
pass
1304
1305
1306
class DBusPropertyNotFound(DBusPropertyException):
1307
"""An attempt was made to access a non-existing property.
1308
"""
1309
pass
1310
1311
1312
class DBusObjectWithAnnotations(dbus.service.Object):
1313
"""A D-Bus object with annotations.
1314
1315
Classes inheriting from this can use the dbus_annotations
1316
decorator to add annotations to methods or signals.
1317
"""
1318
1319
@staticmethod
1320
def _is_dbus_thing(thing):
1321
"""Returns a function testing if an attribute is a D-Bus thing
1322
1323
If called like _is_dbus_thing("method") it returns a function
1324
suitable for use as predicate to inspect.getmembers().
1325
"""
1326
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
1327
False)
1328
1329
def _get_all_dbus_things(self, thing):
1330
"""Returns a generator of (name, attribute) pairs
1331
"""
1332
return ((getattr(athing.__get__(self), "_dbus_name", name),
1333
athing.__get__(self))
1334
for cls in self.__class__.__mro__
1335
for name, athing in
1336
inspect.getmembers(cls, self._is_dbus_thing(thing)))
1337
1338
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1339
out_signature="s",
1340
path_keyword="object_path",
1341
connection_keyword="connection")
1342
def Introspect(self, object_path, connection):
1343
"""Overloading of standard D-Bus method.
1344
1345
Inserts annotation tags on methods and signals.
1346
"""
1347
xmlstring = dbus.service.Object.Introspect(self, object_path,
1348
connection)
1349
try:
1350
document = xml.dom.minidom.parseString(xmlstring)
1351
1352
for if_tag in document.getElementsByTagName("interface"):
1353
# Add annotation tags
1354
for typ in ("method", "signal"):
1355
for tag in if_tag.getElementsByTagName(typ):
1356
annots = dict()
1357
for name, prop in (self.
1358
_get_all_dbus_things(typ)):
1359
if (name == tag.getAttribute("name")
1360
and prop._dbus_interface
1361
== if_tag.getAttribute("name")):
1362
annots.update(getattr(
1363
prop, "_dbus_annotations", {}))
1364
for name, value in annots.items():
1365
ann_tag = document.createElement(
1366
"annotation")
1367
ann_tag.setAttribute("name", name)
1368
ann_tag.setAttribute("value", value)
1369
tag.appendChild(ann_tag)
1370
# Add interface annotation tags
1371
for annotation, value in dict(
1372
itertools.chain.from_iterable(
1373
annotations().items()
1374
for name, annotations
1375
in self._get_all_dbus_things("interface")
1376
if name == if_tag.getAttribute("name")
1377
)).items():
1378
ann_tag = document.createElement("annotation")
1379
ann_tag.setAttribute("name", annotation)
1380
ann_tag.setAttribute("value", value)
1381
if_tag.appendChild(ann_tag)
1382
# Fix argument name for the Introspect method itself
1383
if (if_tag.getAttribute("name")
1384
== dbus.INTROSPECTABLE_IFACE):
1385
for cn in if_tag.getElementsByTagName("method"):
1386
if cn.getAttribute("name") == "Introspect":
1387
for arg in cn.getElementsByTagName("arg"):
1388
if (arg.getAttribute("direction")
1389
== "out"):
1390
arg.setAttribute("name",
1391
"xml_data")
1392
xmlstring = document.toxml("utf-8")
1393
document.unlink()
1394
except (AttributeError, xml.dom.DOMException,
1395
xml.parsers.expat.ExpatError) as error:
1396
logger.error("Failed to override Introspection method",
1397
exc_info=error)
1398
return xmlstring
1399
1400
1401
class DBusObjectWithProperties(DBusObjectWithAnnotations):
1402
"""A D-Bus object with properties.
1403
1404
Classes inheriting from this can use the dbus_service_property
1405
decorator to expose methods as D-Bus properties. It exposes the
1406
standard Get(), Set(), and GetAll() methods on the D-Bus.
1407
"""
1408
1409
def _get_dbus_property(self, interface_name, property_name):
1410
"""Returns a bound method if one exists which is a D-Bus
1411
property with the specified name and interface.
1412
"""
1413
for cls in self.__class__.__mro__:
1414
for name, value in inspect.getmembers(
1415
cls, self._is_dbus_thing("property")):
1416
if (value._dbus_name == property_name
1417
and value._dbus_interface == interface_name):
1418
return value.__get__(self)
1419
1420
# No such property
1421
raise DBusPropertyNotFound("{}:{}.{}".format(
1422
self.dbus_object_path, interface_name, property_name))
1423
1424
@classmethod
1425
def _get_all_interface_names(cls):
1426
"""Get a sequence of all interfaces supported by an object"""
1427
return (name for name in set(getattr(getattr(x, attr),
1428
"_dbus_interface", None)
1429
for x in (inspect.getmro(cls))
1430
for attr in dir(x))
1431
if name is not None)
1432
1433
@dbus.service.method(dbus.PROPERTIES_IFACE,
1434
in_signature="ss",
1435
out_signature="v")
1436
def Get(self, interface_name, property_name):
1437
"""Standard D-Bus property Get() method, see D-Bus standard.
1438
"""
1439
prop = self._get_dbus_property(interface_name, property_name)
1440
if prop._dbus_access == "write":
1441
raise DBusPropertyAccessException(property_name)
1442
value = prop()
1443
if not hasattr(value, "variant_level"):
1444
return value
1445
return type(value)(value, variant_level=value.variant_level+1)
1446
1447
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
1448
def Set(self, interface_name, property_name, value):
1449
"""Standard D-Bus property Set() method, see D-Bus standard.
1450
"""
1451
prop = self._get_dbus_property(interface_name, property_name)
1452
if prop._dbus_access == "read":
1453
raise DBusPropertyAccessException(property_name)
1454
if prop._dbus_get_args_options["byte_arrays"]:
1455
# The byte_arrays option is not supported yet on
1456
# signatures other than "ay".
1457
if prop._dbus_signature != "ay":
1458
raise ValueError("Byte arrays not supported for non-"
1459
"'ay' signature {!r}"
1460
.format(prop._dbus_signature))
1461
value = dbus.ByteArray(bytes(value))
1462
prop(value)
1463
1464
@dbus.service.method(dbus.PROPERTIES_IFACE,
1465
in_signature="s",
1466
out_signature="a{sv}")
1467
def GetAll(self, interface_name):
1468
"""Standard D-Bus property GetAll() method, see D-Bus
1469
standard.
1470
1471
Note: Will not include properties with access="write".
1472
"""
1473
properties = {}
1474
for name, prop in self._get_all_dbus_things("property"):
1475
if (interface_name
1476
and interface_name != prop._dbus_interface):
1477
# Interface non-empty but did not match
1478
continue
1479
# Ignore write-only properties
1480
if prop._dbus_access == "write":
1481
continue
1482
value = prop()
1483
if not hasattr(value, "variant_level"):
1484
properties[name] = value
1485
continue
1486
properties[name] = type(value)(
1487
value, variant_level=value.variant_level + 1)
1488
return dbus.Dictionary(properties, signature="sv")
1489
1490
@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
1491
def PropertiesChanged(self, interface_name, changed_properties,
1492
invalidated_properties):
1493
"""Standard D-Bus PropertiesChanged() signal, see D-Bus
1494
standard.
1495
"""
1496
pass
1497
1498
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1499
out_signature="s",
1500
path_keyword="object_path",
1501
connection_keyword="connection")
1502
def Introspect(self, object_path, connection):
1503
"""Overloading of standard D-Bus method.
1504
1505
Inserts property tags and interface annotation tags.
1506
"""
1507
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1508
object_path,
1509
connection)
1510
try:
1511
document = xml.dom.minidom.parseString(xmlstring)
1512
1513
def make_tag(document, name, prop):
1514
e = document.createElement("property")
1515
e.setAttribute("name", name)
1516
e.setAttribute("type", prop._dbus_signature)
1517
e.setAttribute("access", prop._dbus_access)
1518
return e
1519
1520
for if_tag in document.getElementsByTagName("interface"):
1521
# Add property tags
1522
for tag in (make_tag(document, name, prop)
1523
for name, prop
1524
in self._get_all_dbus_things("property")
1525
if prop._dbus_interface
1526
== if_tag.getAttribute("name")):
1527
if_tag.appendChild(tag)
1528
# Add annotation tags for properties
1529
for tag in if_tag.getElementsByTagName("property"):
1530
annots = dict()
1531
for name, prop in self._get_all_dbus_things(
1532
"property"):
1533
if (name == tag.getAttribute("name")
1534
and prop._dbus_interface
1535
== if_tag.getAttribute("name")):
1536
annots.update(getattr(
1537
prop, "_dbus_annotations", {}))
1538
for name, value in annots.items():
1539
ann_tag = document.createElement(
1540
"annotation")
1541
ann_tag.setAttribute("name", name)
1542
ann_tag.setAttribute("value", value)
1543
tag.appendChild(ann_tag)
1544
# Add the names to the return values for the
1545
# "org.freedesktop.DBus.Properties" methods
1546
if (if_tag.getAttribute("name")
1547
== "org.freedesktop.DBus.Properties"):
1548
for cn in if_tag.getElementsByTagName("method"):
1549
if cn.getAttribute("name") == "Get":
1550
for arg in cn.getElementsByTagName("arg"):
1551
if (arg.getAttribute("direction")
1552
== "out"):
1553
arg.setAttribute("name", "value")
1554
elif cn.getAttribute("name") == "GetAll":
1555
for arg in cn.getElementsByTagName("arg"):
1556
if (arg.getAttribute("direction")
1557
== "out"):
1558
arg.setAttribute("name", "props")
1559
xmlstring = document.toxml("utf-8")
1560
document.unlink()
1561
except (AttributeError, xml.dom.DOMException,
1562
xml.parsers.expat.ExpatError) as error:
1563
logger.error("Failed to override Introspection method",
1564
exc_info=error)
1565
return xmlstring
1566
1567
1568
try:
1569
dbus.OBJECT_MANAGER_IFACE
1570
except AttributeError:
1571
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1572
1573
1574
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1575
"""A D-Bus object with an ObjectManager.
1576
1577
Classes inheriting from this exposes the standard
1578
GetManagedObjects call and the InterfacesAdded and
1579
InterfacesRemoved signals on the standard
1580
"org.freedesktop.DBus.ObjectManager" interface.
1581
1582
Note: No signals are sent automatically; they must be sent
1583
manually.
1584
"""
1585
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1586
out_signature="a{oa{sa{sv}}}")
1587
def GetManagedObjects(self):
1588
"""This function must be overridden"""
1589
raise NotImplementedError()
1590
1591
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1592
signature="oa{sa{sv}}")
1593
def InterfacesAdded(self, object_path, interfaces_and_properties):
1594
pass
1595
1596
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1597
def InterfacesRemoved(self, object_path, interfaces):
1598
pass
1599
1600
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1601
out_signature="s",
1602
path_keyword="object_path",
1603
connection_keyword="connection")
1604
def Introspect(self, object_path, connection):
1605
"""Overloading of standard D-Bus method.
1606
1607
Override return argument name of GetManagedObjects to be
1608
"objpath_interfaces_and_properties"
1609
"""
1610
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1611
object_path,
1612
connection)
1613
try:
1614
document = xml.dom.minidom.parseString(xmlstring)
1615
1616
for if_tag in document.getElementsByTagName("interface"):
1617
# Fix argument name for the GetManagedObjects method
1618
if (if_tag.getAttribute("name")
1619
== dbus.OBJECT_MANAGER_IFACE):
1620
for cn in if_tag.getElementsByTagName("method"):
1621
if (cn.getAttribute("name")
1622
== "GetManagedObjects"):
1623
for arg in cn.getElementsByTagName("arg"):
1624
if (arg.getAttribute("direction")
1625
== "out"):
1626
arg.setAttribute(
1627
"name",
1628
"objpath_interfaces"
1629
"_and_properties")
1630
xmlstring = document.toxml("utf-8")
1631
document.unlink()
1632
except (AttributeError, xml.dom.DOMException,
1633
xml.parsers.expat.ExpatError) as error:
1634
logger.error("Failed to override Introspection method",
1635
exc_info=error)
1636
return xmlstring
1637
1638
1639
def datetime_to_dbus(dt, variant_level=0):
1640
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1641
if dt is None:
1642
return dbus.String("", variant_level=variant_level)
1643
return dbus.String(dt.isoformat(), variant_level=variant_level)
1644
1645
1646
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1647
"""A class decorator; applied to a subclass of
1648
dbus.service.Object, it will add alternate D-Bus attributes with
1649
interface names according to the "alt_interface_names" mapping.
1650
Usage:
1651
1652
@alternate_dbus_interfaces({"org.example.Interface":
1653
"net.example.AlternateInterface"})
1654
class SampleDBusObject(dbus.service.Object):
1655
@dbus.service.method("org.example.Interface")
1656
def SampleDBusMethod():
1657
pass
1658
1659
The above "SampleDBusMethod" on "SampleDBusObject" will be
1660
reachable via two interfaces: "org.example.Interface" and
1661
"net.example.AlternateInterface", the latter of which will have
1662
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1663
"true", unless "deprecate" is passed with a False value.
1664
1665
This works for methods and signals, and also for D-Bus properties
1666
(from DBusObjectWithProperties) and interfaces (from the
1667
dbus_interface_annotations decorator).
1668
"""
1669
1670
def wrapper(cls):
1671
for orig_interface_name, alt_interface_name in (
1672
alt_interface_names.items()):
1673
attr = {}
1674
interface_names = set()
1675
# Go though all attributes of the class
1676
for attrname, attribute in inspect.getmembers(cls):
1677
# Ignore non-D-Bus attributes, and D-Bus attributes
1678
# with the wrong interface name
1679
if (not hasattr(attribute, "_dbus_interface")
1680
or not attribute._dbus_interface.startswith(
1681
orig_interface_name)):
1682
continue
1683
# Create an alternate D-Bus interface name based on
1684
# the current name
1685
alt_interface = attribute._dbus_interface.replace(
1686
orig_interface_name, alt_interface_name)
1687
interface_names.add(alt_interface)
1688
# Is this a D-Bus signal?
1689
if getattr(attribute, "_dbus_is_signal", False):
1690
# Extract the original non-method undecorated
1691
# function by black magic
1692
if sys.version_info.major == 2:
1693
nonmethod_func = (dict(
1694
zip(attribute.func_code.co_freevars,
1695
attribute.__closure__))
1696
["func"].cell_contents)
1697
else:
1698
nonmethod_func = (dict(
1699
zip(attribute.__code__.co_freevars,
1700
attribute.__closure__))
1701
["func"].cell_contents)
1702
# Create a new, but exactly alike, function
1703
# object, and decorate it to be a new D-Bus signal
1704
# with the alternate D-Bus interface name
1705
new_function = copy_function(nonmethod_func)
1706
new_function = (dbus.service.signal(
1707
alt_interface,
1708
attribute._dbus_signature)(new_function))
1709
# Copy annotations, if any
1710
try:
1711
new_function._dbus_annotations = dict(
1712
attribute._dbus_annotations)
1713
except AttributeError:
1714
pass
1715
1716
# Define a creator of a function to call both the
1717
# original and alternate functions, so both the
1718
# original and alternate signals gets sent when
1719
# the function is called
1720
def fixscope(func1, func2):
1721
"""This function is a scope container to pass
1722
func1 and func2 to the "call_both" function
1723
outside of its arguments"""
1724
1725
@functools.wraps(func2)
1726
def call_both(*args, **kwargs):
1727
"""This function will emit two D-Bus
1728
signals by calling func1 and func2"""
1729
func1(*args, **kwargs)
1730
func2(*args, **kwargs)
1731
# Make wrapper function look like a D-Bus
1732
# signal
1733
for name, attr in inspect.getmembers(func2):
1734
if name.startswith("_dbus_"):
1735
setattr(call_both, name, attr)
1736
1737
return call_both
1738
# Create the "call_both" function and add it to
1739
# the class
1740
attr[attrname] = fixscope(attribute, new_function)
1741
# Is this a D-Bus method?
1742
elif getattr(attribute, "_dbus_is_method", False):
1743
# Create a new, but exactly alike, function
1744
# object. Decorate it to be a new D-Bus method
1745
# with the alternate D-Bus interface name. Add it
1746
# to the class.
1747
attr[attrname] = (
1748
dbus.service.method(
1749
alt_interface,
1750
attribute._dbus_in_signature,
1751
attribute._dbus_out_signature)
1752
(copy_function(attribute)))
1753
# Copy annotations, if any
1754
try:
1755
attr[attrname]._dbus_annotations = dict(
1756
attribute._dbus_annotations)
1757
except AttributeError:
1758
pass
1759
# Is this a D-Bus property?
1760
elif getattr(attribute, "_dbus_is_property", False):
1761
# Create a new, but exactly alike, function
1762
# object, and decorate it to be a new D-Bus
1763
# property with the alternate D-Bus interface
1764
# name. Add it to the class.
1765
attr[attrname] = (dbus_service_property(
1766
alt_interface, attribute._dbus_signature,
1767
attribute._dbus_access,
1768
attribute._dbus_get_args_options
1769
["byte_arrays"])
1770
(copy_function(attribute)))
1771
# Copy annotations, if any
1772
try:
1773
attr[attrname]._dbus_annotations = dict(
1774
attribute._dbus_annotations)
1775
except AttributeError:
1776
pass
1777
# Is this a D-Bus interface?
1778
elif getattr(attribute, "_dbus_is_interface", False):
1779
# Create a new, but exactly alike, function
1780
# object. Decorate it to be a new D-Bus interface
1781
# with the alternate D-Bus interface name. Add it
1782
# to the class.
1783
attr[attrname] = (
1784
dbus_interface_annotations(alt_interface)
1785
(copy_function(attribute)))
1786
if deprecate:
1787
# Deprecate all alternate interfaces
1788
iname = "_AlternateDBusNames_interface_annotation{}"
1789
for interface_name in interface_names:
1790
1791
@dbus_interface_annotations(interface_name)
1792
def func(self):
1793
return {"org.freedesktop.DBus.Deprecated":
1794
"true"}
1795
# Find an unused name
1796
for aname in (iname.format(i)
1797
for i in itertools.count()):
1798
if aname not in attr:
1799
attr[aname] = func
1800
break
1801
if interface_names:
1802
# Replace the class with a new subclass of it with
1803
# methods, signals, etc. as created above.
1804
if sys.version_info.major == 2:
1805
cls = type(b"{}Alternate".format(cls.__name__),
1806
(cls, ), attr)
1807
else:
1808
cls = type("{}Alternate".format(cls.__name__),
1809
(cls, ), attr)
1810
return cls
1811
1812
return wrapper
1813
1814
1815
@alternate_dbus_interfaces({"se.recompile.Mandos":
1816
"se.bsnet.fukt.Mandos"})
1817
class ClientDBus(Client, DBusObjectWithProperties):
1818
"""A Client class using D-Bus
1819
1820
Attributes:
1821
dbus_object_path: dbus.ObjectPath
1822
bus: dbus.SystemBus()
1823
"""
1824
1825
runtime_expansions = (Client.runtime_expansions
1826
+ ("dbus_object_path", ))
1827
1828
_interface = "se.recompile.Mandos.Client"
1829
1830
# dbus.service.Object doesn't use super(), so we can't either.
1831
1832
def __init__(self, bus=None, *args, **kwargs):
1833
self.bus = bus
1834
Client.__init__(self, *args, **kwargs)
1835
# Only now, when this client is initialized, can it show up on
1836
# the D-Bus
1837
client_object_name = str(self.name).translate(
1838
{ord("."): ord("_"),
1839
ord("-"): ord("_")})
1840
self.dbus_object_path = dbus.ObjectPath(
1841
"/clients/" + client_object_name)
1842
DBusObjectWithProperties.__init__(self, self.bus,
1843
self.dbus_object_path)
1844
1845
def notifychangeproperty(transform_func, dbus_name,
1846
type_func=lambda x: x,
1847
variant_level=1,
1848
invalidate_only=False,
1849
_interface=_interface):
1850
""" Modify a variable so that it's a property which announces
1851
its changes to DBus.
1852
1853
transform_fun: Function that takes a value and a variant_level
1854
and transforms it to a D-Bus type.
1855
dbus_name: D-Bus name of the variable
1856
type_func: Function that transform the value before sending it
1857
to the D-Bus. Default: no transform
1858
variant_level: D-Bus variant level. Default: 1
1859
"""
1860
attrname = "_{}".format(dbus_name)
1861
1862
def setter(self, value):
1863
if hasattr(self, "dbus_object_path"):
1864
if (not hasattr(self, attrname) or
1865
type_func(getattr(self, attrname, None))
1866
!= type_func(value)):
1867
if invalidate_only:
1868
self.PropertiesChanged(
1869
_interface, dbus.Dictionary(),
1870
dbus.Array((dbus_name, )))
1871
else:
1872
dbus_value = transform_func(
1873
type_func(value),
1874
variant_level=variant_level)
1875
self.PropertyChanged(dbus.String(dbus_name),
1876
dbus_value)
1877
self.PropertiesChanged(
1878
_interface,
1879
dbus.Dictionary({dbus.String(dbus_name):
1880
dbus_value}),
1881
dbus.Array())
1882
setattr(self, attrname, value)
1883
1884
return property(lambda self: getattr(self, attrname), setter)
1885
1886
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1887
approvals_pending = notifychangeproperty(dbus.Boolean,
1888
"ApprovalPending",
1889
type_func=bool)
1890
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1891
last_enabled = notifychangeproperty(datetime_to_dbus,
1892
"LastEnabled")
1893
checker = notifychangeproperty(
1894
dbus.Boolean, "CheckerRunning",
1895
type_func=lambda checker: checker is not None)
1896
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1897
"LastCheckedOK")
1898
last_checker_status = notifychangeproperty(dbus.Int16,
1899
"LastCheckerStatus")
1900
last_approval_request = notifychangeproperty(
1901
datetime_to_dbus, "LastApprovalRequest")
1902
approved_by_default = notifychangeproperty(dbus.Boolean,
1903
"ApprovedByDefault")
1904
approval_delay = notifychangeproperty(
1905
dbus.UInt64, "ApprovalDelay",
1906
type_func=lambda td: td.total_seconds() * 1000)
1907
approval_duration = notifychangeproperty(
1908
dbus.UInt64, "ApprovalDuration",
1909
type_func=lambda td: td.total_seconds() * 1000)
1910
host = notifychangeproperty(dbus.String, "Host")
1911
timeout = notifychangeproperty(
1912
dbus.UInt64, "Timeout",
1913
type_func=lambda td: td.total_seconds() * 1000)
1914
extended_timeout = notifychangeproperty(
1915
dbus.UInt64, "ExtendedTimeout",
1916
type_func=lambda td: td.total_seconds() * 1000)
1917
interval = notifychangeproperty(
1918
dbus.UInt64, "Interval",
1919
type_func=lambda td: td.total_seconds() * 1000)
1920
checker_command = notifychangeproperty(dbus.String, "Checker")
1921
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1922
invalidate_only=True)
1923
1924
del notifychangeproperty
1925
1926
def __del__(self, *args, **kwargs):
1927
try:
1928
self.remove_from_connection()
1929
except LookupError:
1930
pass
1931
if hasattr(DBusObjectWithProperties, "__del__"):
1932
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1933
Client.__del__(self, *args, **kwargs)
1934
1935
def checker_callback(self, source, condition,
1936
connection, command, *args, **kwargs):
1937
ret = Client.checker_callback(self, source, condition,
1938
connection, command, *args,
1939
**kwargs)
1940
exitstatus = self.last_checker_status
1941
if exitstatus >= 0:
1942
# Emit D-Bus signal
1943
self.CheckerCompleted(dbus.Int16(exitstatus),
1944
# This is specific to GNU libC
1945
dbus.Int64(exitstatus << 8),
1946
dbus.String(command))
1947
else:
1948
# Emit D-Bus signal
1949
self.CheckerCompleted(dbus.Int16(-1),
1950
dbus.Int64(
1951
# This is specific to GNU libC
1952
(exitstatus << 8)
1953
| self.last_checker_signal),
1954
dbus.String(command))
1955
return ret
1956
1957
def start_checker(self, *args, **kwargs):
1958
old_checker_pid = getattr(self.checker, "pid", None)
1959
r = Client.start_checker(self, *args, **kwargs)
1960
# Only if new checker process was started
1961
if (self.checker is not None
1962
and old_checker_pid != self.checker.pid):
1963
# Emit D-Bus signal
1964
self.CheckerStarted(self.current_checker_command)
1965
return r
1966
1967
def _reset_approved(self):
1968
self.approved = None
1969
return False
1970
1971
def approve(self, value=True):
1972
self.approved = value
1973
GLib.timeout_add(int(self.approval_duration.total_seconds()
1974
* 1000), self._reset_approved)
1975
self.send_changedstate()
1976
1977
# D-Bus methods, signals & properties
1978
1979
# Interfaces
1980
1981
# Signals
1982
1983
# CheckerCompleted - signal
1984
@dbus.service.signal(_interface, signature="nxs")
1985
def CheckerCompleted(self, exitcode, waitstatus, command):
1986
"D-Bus signal"
1987
pass
1988
1989
# CheckerStarted - signal
1990
@dbus.service.signal(_interface, signature="s")
1991
def CheckerStarted(self, command):
1992
"D-Bus signal"
1993
pass
1994
1995
# PropertyChanged - signal
1996
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1997
@dbus.service.signal(_interface, signature="sv")
1998
def PropertyChanged(self, property, value):
1999
"D-Bus signal"
2000
pass
2001
2002
# GotSecret - signal
2003
@dbus.service.signal(_interface)
2004
def GotSecret(self):
2005
"""D-Bus signal
2006
Is sent after a successful transfer of secret from the Mandos
2007
server to mandos-client
2008
"""
2009
pass
2010
2011
# Rejected - signal
2012
@dbus.service.signal(_interface, signature="s")
2013
def Rejected(self, reason):
2014
"D-Bus signal"
2015
pass
2016
2017
# NeedApproval - signal
2018
@dbus.service.signal(_interface, signature="tb")
2019
def NeedApproval(self, timeout, default):
2020
"D-Bus signal"
2021
return self.need_approval()
2022
2023
# Methods
2024
2025
# Approve - method
2026
@dbus.service.method(_interface, in_signature="b")
2027
def Approve(self, value):
2028
self.approve(value)
2029
2030
# CheckedOK - method
2031
@dbus.service.method(_interface)
2032
def CheckedOK(self):
2033
self.checked_ok()
2034
2035
# Enable - method
2036
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
2037
@dbus.service.method(_interface)
2038
def Enable(self):
2039
"D-Bus method"
2040
self.enable()
2041
2042
# StartChecker - method
2043
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
2044
@dbus.service.method(_interface)
2045
def StartChecker(self):
2046
"D-Bus method"
2047
self.start_checker()
2048
2049
# Disable - method
2050
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
2051
@dbus.service.method(_interface)
2052
def Disable(self):
2053
"D-Bus method"
2054
self.disable()
2055
2056
# StopChecker - method
2057
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
2058
@dbus.service.method(_interface)
2059
def StopChecker(self):
2060
self.stop_checker()
2061
2062
# Properties
2063
2064
# ApprovalPending - property
2065
@dbus_service_property(_interface, signature="b", access="read")
2066
def ApprovalPending_dbus_property(self):
2067
return dbus.Boolean(bool(self.approvals_pending))
2068
2069
# ApprovedByDefault - property
2070
@dbus_service_property(_interface,
2071
signature="b",
2072
access="readwrite")
2073
def ApprovedByDefault_dbus_property(self, value=None):
2074
if value is None: # get
2075
return dbus.Boolean(self.approved_by_default)
2076
self.approved_by_default = bool(value)
2077
2078
# ApprovalDelay - property
2079
@dbus_service_property(_interface,
2080
signature="t",
2081
access="readwrite")
2082
def ApprovalDelay_dbus_property(self, value=None):
2083
if value is None: # get
2084
return dbus.UInt64(self.approval_delay.total_seconds()
2085
* 1000)
2086
self.approval_delay = datetime.timedelta(0, 0, 0, value)
2087
2088
# ApprovalDuration - property
2089
@dbus_service_property(_interface,
2090
signature="t",
2091
access="readwrite")
2092
def ApprovalDuration_dbus_property(self, value=None):
2093
if value is None: # get
2094
return dbus.UInt64(self.approval_duration.total_seconds()
2095
* 1000)
2096
self.approval_duration = datetime.timedelta(0, 0, 0, value)
2097
2098
# Name - property
2099
@dbus_annotations(
2100
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2101
@dbus_service_property(_interface, signature="s", access="read")
2102
def Name_dbus_property(self):
2103
return dbus.String(self.name)
2104
2105
# KeyID - property
2106
@dbus_annotations(
2107
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2108
@dbus_service_property(_interface, signature="s", access="read")
2109
def KeyID_dbus_property(self):
2110
return dbus.String(self.key_id)
2111
2112
# Fingerprint - property
2113
@dbus_annotations(
2114
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2115
@dbus_service_property(_interface, signature="s", access="read")
2116
def Fingerprint_dbus_property(self):
2117
return dbus.String(self.fingerprint)
2118
2119
# Host - property
2120
@dbus_service_property(_interface,
2121
signature="s",
2122
access="readwrite")
2123
def Host_dbus_property(self, value=None):
2124
if value is None: # get
2125
return dbus.String(self.host)
2126
self.host = str(value)
2127
2128
# Created - property
2129
@dbus_annotations(
2130
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2131
@dbus_service_property(_interface, signature="s", access="read")
2132
def Created_dbus_property(self):
2133
return datetime_to_dbus(self.created)
2134
2135
# LastEnabled - property
2136
@dbus_service_property(_interface, signature="s", access="read")
2137
def LastEnabled_dbus_property(self):
2138
return datetime_to_dbus(self.last_enabled)
2139
2140
# Enabled - property
2141
@dbus_service_property(_interface,
2142
signature="b",
2143
access="readwrite")
2144
def Enabled_dbus_property(self, value=None):
2145
if value is None: # get
2146
return dbus.Boolean(self.enabled)
2147
if value:
2148
self.enable()
2149
else:
2150
self.disable()
2151
2152
# LastCheckedOK - property
2153
@dbus_service_property(_interface,
2154
signature="s",
2155
access="readwrite")
2156
def LastCheckedOK_dbus_property(self, value=None):
2157
if value is not None:
2158
self.checked_ok()
2159
return
2160
return datetime_to_dbus(self.last_checked_ok)
2161
2162
# LastCheckerStatus - property
2163
@dbus_service_property(_interface, signature="n", access="read")
2164
def LastCheckerStatus_dbus_property(self):
2165
return dbus.Int16(self.last_checker_status)
2166
2167
# Expires - property
2168
@dbus_service_property(_interface, signature="s", access="read")
2169
def Expires_dbus_property(self):
2170
return datetime_to_dbus(self.expires)
2171
2172
# LastApprovalRequest - property
2173
@dbus_service_property(_interface, signature="s", access="read")
2174
def LastApprovalRequest_dbus_property(self):
2175
return datetime_to_dbus(self.last_approval_request)
2176
2177
# Timeout - property
2178
@dbus_service_property(_interface,
2179
signature="t",
2180
access="readwrite")
2181
def Timeout_dbus_property(self, value=None):
2182
if value is None: # get
2183
return dbus.UInt64(self.timeout.total_seconds() * 1000)
2184
old_timeout = self.timeout
2185
self.timeout = datetime.timedelta(0, 0, 0, value)
2186
# Reschedule disabling
2187
if self.enabled:
2188
now = datetime.datetime.utcnow()
2189
self.expires += self.timeout - old_timeout
2190
if self.expires <= now:
2191
# The timeout has passed
2192
self.disable()
2193
else:
2194
if (getattr(self, "disable_initiator_tag", None)
2195
is None):
2196
return
2197
GLib.source_remove(self.disable_initiator_tag)
2198
self.disable_initiator_tag = GLib.timeout_add(
2199
int((self.expires - now).total_seconds() * 1000),
2200
self.disable)
2201
2202
# ExtendedTimeout - property
2203
@dbus_service_property(_interface,
2204
signature="t",
2205
access="readwrite")
2206
def ExtendedTimeout_dbus_property(self, value=None):
2207
if value is None: # get
2208
return dbus.UInt64(self.extended_timeout.total_seconds()
2209
* 1000)
2210
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
2211
2212
# Interval - property
2213
@dbus_service_property(_interface,
2214
signature="t",
2215
access="readwrite")
2216
def Interval_dbus_property(self, value=None):
2217
if value is None: # get
2218
return dbus.UInt64(self.interval.total_seconds() * 1000)
2219
self.interval = datetime.timedelta(0, 0, 0, value)
2220
if getattr(self, "checker_initiator_tag", None) is None:
2221
return
2222
if self.enabled:
2223
# Reschedule checker run
2224
GLib.source_remove(self.checker_initiator_tag)
2225
self.checker_initiator_tag = GLib.timeout_add(
2226
value, self.start_checker)
2227
self.start_checker() # Start one now, too
2228
2229
# Checker - property
2230
@dbus_service_property(_interface,
2231
signature="s",
2232
access="readwrite")
2233
def Checker_dbus_property(self, value=None):
2234
if value is None: # get
2235
return dbus.String(self.checker_command)
2236
self.checker_command = str(value)
2237
2238
# CheckerRunning - property
2239
@dbus_service_property(_interface,
2240
signature="b",
2241
access="readwrite")
2242
def CheckerRunning_dbus_property(self, value=None):
2243
if value is None: # get
2244
return dbus.Boolean(self.checker is not None)
2245
if value:
2246
self.start_checker()
2247
else:
2248
self.stop_checker()
2249
2250
# ObjectPath - property
2251
@dbus_annotations(
2252
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
2253
"org.freedesktop.DBus.Deprecated": "true"})
2254
@dbus_service_property(_interface, signature="o", access="read")
2255
def ObjectPath_dbus_property(self):
2256
return self.dbus_object_path # is already a dbus.ObjectPath
2257
2258
# Secret = property
2259
@dbus_annotations(
2260
{"org.freedesktop.DBus.Property.EmitsChangedSignal":
2261
"invalidates"})
2262
@dbus_service_property(_interface,
2263
signature="ay",
2264
access="write",
2265
byte_arrays=True)
2266
def Secret_dbus_property(self, value):
2267
self.secret = bytes(value)
2268
2269
del _interface
2270
2271
2272
class ProxyClient:
2273
def __init__(self, child_pipe, key_id, fpr, address):
2274
self._pipe = child_pipe
2275
self._pipe.send(("init", key_id, fpr, address))
2276
if not self._pipe.recv():
2277
raise KeyError(key_id or fpr)
2278
2279
def __getattribute__(self, name):
2280
if name == "_pipe":
2281
return super(ProxyClient, self).__getattribute__(name)
2282
self._pipe.send(("getattr", name))
2283
data = self._pipe.recv()
2284
if data[0] == "data":
2285
return data[1]
2286
if data[0] == "function":
2287
2288
def func(*args, **kwargs):
2289
self._pipe.send(("funcall", name, args, kwargs))
2290
return self._pipe.recv()[1]
2291
2292
return func
2293
2294
def __setattr__(self, name, value):
2295
if name == "_pipe":
2296
return super(ProxyClient, self).__setattr__(name, value)
2297
self._pipe.send(("setattr", name, value))
2298
2299
2300
class ClientHandler(socketserver.BaseRequestHandler, object):
2301
"""A class to handle client connections.
2302
2303
Instantiated once for each connection to handle it.
248
def still_valid(self, now=None):
249
"""Has the timeout not yet passed for this client?"""
250
if now is None:
251
now = datetime.datetime.now()
252
if self.last_seen is None:
253
return now < (self.created + self.timeout)
254
else:
255
return now < (self.last_seen + self.timeout)
256
257
258
def peer_certificate(session):
259
# If not an OpenPGP certificate...
260
if gnutls.library.functions.gnutls_certificate_type_get\
261
(session._c_object) \
262
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP:
263
# ...do the normal thing
264
return session.peer_certificate
265
list_size = ctypes.c_uint()
266
cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
267
(session._c_object, ctypes.byref(list_size))
268
if list_size.value == 0:
269
return None
270
cert = cert_list[0]
271
return ctypes.string_at(cert.data, cert.size)
272
273
274
def fingerprint(openpgp):
275
# New empty GnuTLS certificate
276
crt = gnutls.library.types.gnutls_openpgp_crt_t()
277
gnutls.library.functions.gnutls_openpgp_crt_init\
278
(ctypes.byref(crt))
279
# New GnuTLS "datum" with the OpenPGP public key
280
datum = gnutls.library.types.gnutls_datum_t\
281
(ctypes.cast(ctypes.c_char_p(openpgp),
282
ctypes.POINTER(ctypes.c_ubyte)),
283
ctypes.c_uint(len(openpgp)))
284
# Import the OpenPGP public key into the certificate
285
ret = gnutls.library.functions.gnutls_openpgp_crt_import\
286
(crt,
287
ctypes.byref(datum),
288
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
289
# New buffer for the fingerprint
290
buffer = ctypes.create_string_buffer(20)
291
buffer_length = ctypes.c_size_t()
292
# Get the fingerprint from the certificate into the buffer
293
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
294
(crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
295
# Deinit the certificate
296
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
297
# Convert the buffer to a Python bytestring
298
fpr = ctypes.string_at(buffer, buffer_length.value)
299
# Convert the bytestring to hexadecimal notation
300
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
301
return hex_fpr
302
303
304
class tcp_handler(SocketServer.BaseRequestHandler, object):
305
"""A TCP request handler class.
306
Instantiated by IPv6_TCPServer for each request to handle it.
2304
307
Note: This will run in its own forked process."""
2305
308
2306
309
def handle(self):
2307
with contextlib.closing(self.server.child_pipe) as child_pipe:
2308
logger.info("TCP connection from: %s",
2309
str(self.client_address))
2310
logger.debug("Pipe FD: %d",
2311
self.server.child_pipe.fileno())
2312
2313
session = gnutls.ClientSession(self.request)
2314
2315
# priority = ":".join(("NONE", "+VERS-TLS1.1",
2316
# "+AES-256-CBC", "+SHA1",
2317
# "+COMP-NULL", "+CTYPE-OPENPGP",
2318
# "+DHE-DSS"))
2319
# Use a fallback default, since this MUST be set.
2320
priority = self.server.gnutls_priority
2321
if priority is None:
2322
priority = "NORMAL"
2323
gnutls.priority_set_direct(session,
2324
priority.encode("utf-8"), None)
2325
2326
# Start communication using the Mandos protocol
2327
# Get protocol number
2328
line = self.request.makefile().readline()
2329
logger.debug("Protocol version: %r", line)
2330
try:
2331
if int(line.strip().split()[0]) > 1:
2332
raise RuntimeError(line)
2333
except (ValueError, IndexError, RuntimeError) as error:
2334
logger.error("Unknown protocol version: %s", error)
2335
return
2336
2337
# Start GnuTLS connection
2338
try:
2339
session.handshake()
2340
except gnutls.Error as error:
2341
logger.warning("Handshake failed: %s", error)
2342
# Do not run session.bye() here: the session is not
2343
# established. Just abandon the request.
2344
return
2345
logger.debug("Handshake succeeded")
2346
2347
approval_required = False
2348
try:
2349
if gnutls.has_rawpk:
2350
fpr = b""
2351
try:
2352
key_id = self.key_id(
2353
self.peer_certificate(session))
2354
except (TypeError, gnutls.Error) as error:
2355
logger.warning("Bad certificate: %s", error)
2356
return
2357
logger.debug("Key ID: %s",
2358
key_id.decode("utf-8",
2359
errors="replace"))
2360
2361
else:
2362
key_id = b""
2363
try:
2364
fpr = self.fingerprint(
2365
self.peer_certificate(session))
2366
except (TypeError, gnutls.Error) as error:
2367
logger.warning("Bad certificate: %s", error)
2368
return
2369
logger.debug("Fingerprint: %s", fpr)
2370
2371
try:
2372
client = ProxyClient(child_pipe, key_id, fpr,
2373
self.client_address)
2374
except KeyError:
2375
return
2376
2377
if client.approval_delay:
2378
delay = client.approval_delay
2379
client.approvals_pending += 1
2380
approval_required = True
2381
2382
while True:
2383
if not client.enabled:
2384
logger.info("Client %s is disabled",
2385
client.name)
2386
if self.server.use_dbus:
2387
# Emit D-Bus signal
2388
client.Rejected("Disabled")
2389
return
2390
2391
if client.approved or not client.approval_delay:
2392
# We are approved or approval is disabled
2393
break
2394
elif client.approved is None:
2395
logger.info("Client %s needs approval",
2396
client.name)
2397
if self.server.use_dbus:
2398
# Emit D-Bus signal
2399
client.NeedApproval(
2400
client.approval_delay.total_seconds()
2401
* 1000, client.approved_by_default)
2402
else:
2403
logger.warning("Client %s was not approved",
2404
client.name)
2405
if self.server.use_dbus:
2406
# Emit D-Bus signal
2407
client.Rejected("Denied")
2408
return
2409
2410
# wait until timeout or approved
2411
time = datetime.datetime.now()
2412
client.changedstate.acquire()
2413
client.changedstate.wait(delay.total_seconds())
2414
client.changedstate.release()
2415
time2 = datetime.datetime.now()
2416
if (time2 - time) >= delay:
2417
if not client.approved_by_default:
2418
logger.warning("Client %s timed out while"
2419
" waiting for approval",
2420
client.name)
2421
if self.server.use_dbus:
2422
# Emit D-Bus signal
2423
client.Rejected("Approval timed out")
2424
return
2425
else:
2426
break
2427
else:
2428
delay -= time2 - time
2429
2430
try:
2431
session.send(client.secret)
2432
except gnutls.Error as error:
2433
logger.warning("gnutls send failed",
2434
exc_info=error)
2435
return
2436
2437
logger.info("Sending secret to %s", client.name)
2438
# bump the timeout using extended_timeout
2439
client.bump_timeout(client.extended_timeout)
2440
if self.server.use_dbus:
2441
# Emit D-Bus signal
2442
client.GotSecret()
2443
2444
finally:
2445
if approval_required:
2446
client.approvals_pending -= 1
2447
try:
2448
session.bye()
2449
except gnutls.Error as error:
2450
logger.warning("GnuTLS bye failed",
2451
exc_info=error)
2452
2453
@staticmethod
2454
def peer_certificate(session):
2455
"Return the peer's certificate as a bytestring"
2456
try:
2457
cert_type = gnutls.certificate_type_get2(
2458
session, gnutls.CTYPE_PEERS)
2459
except AttributeError:
2460
cert_type = gnutls.certificate_type_get(session)
2461
if gnutls.has_rawpk:
2462
valid_cert_types = frozenset((gnutls.CRT_RAWPK,))
2463
else:
2464
valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))
2465
# If not a valid certificate type...
2466
if cert_type not in valid_cert_types:
2467
logger.info("Cert type %r not in %r", cert_type,
2468
valid_cert_types)
2469
# ...return invalid data
2470
return b""
2471
list_size = ctypes.c_uint(1)
2472
cert_list = (gnutls.certificate_get_peers
2473
(session, ctypes.byref(list_size)))
2474
if not bool(cert_list) and list_size.value != 0:
2475
raise gnutls.Error("error getting peer certificate")
2476
if list_size.value == 0:
2477
return None
2478
cert = cert_list[0]
2479
return ctypes.string_at(cert.data, cert.size)
2480
2481
@staticmethod
2482
def key_id(certificate):
2483
"Convert a certificate bytestring to a hexdigit key ID"
2484
# New GnuTLS "datum" with the public key
2485
datum = gnutls.datum_t(
2486
ctypes.cast(ctypes.c_char_p(certificate),
2487
ctypes.POINTER(ctypes.c_ubyte)),
2488
ctypes.c_uint(len(certificate)))
2489
# XXX all these need to be created in the gnutls "module"
2490
# New empty GnuTLS certificate
2491
pubkey = gnutls.pubkey_t()
2492
gnutls.pubkey_init(ctypes.byref(pubkey))
2493
# Import the raw public key into the certificate
2494
gnutls.pubkey_import(pubkey,
2495
ctypes.byref(datum),
2496
gnutls.X509_FMT_DER)
2497
# New buffer for the key ID
2498
buf = ctypes.create_string_buffer(32)
2499
buf_len = ctypes.c_size_t(len(buf))
2500
# Get the key ID from the raw public key into the buffer
2501
gnutls.pubkey_get_key_id(
2502
pubkey,
2503
gnutls.KEYID_USE_SHA256,
2504
ctypes.cast(ctypes.byref(buf),
2505
ctypes.POINTER(ctypes.c_ubyte)),
2506
ctypes.byref(buf_len))
2507
# Deinit the certificate
2508
gnutls.pubkey_deinit(pubkey)
2509
2510
# Convert the buffer to a Python bytestring
2511
key_id = ctypes.string_at(buf, buf_len.value)
2512
# Convert the bytestring to hexadecimal notation
2513
hex_key_id = binascii.hexlify(key_id).upper()
2514
return hex_key_id
2515
2516
@staticmethod
2517
def fingerprint(openpgp):
2518
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
2519
# New GnuTLS "datum" with the OpenPGP public key
2520
datum = gnutls.datum_t(
2521
ctypes.cast(ctypes.c_char_p(openpgp),
2522
ctypes.POINTER(ctypes.c_ubyte)),
2523
ctypes.c_uint(len(openpgp)))
2524
# New empty GnuTLS certificate
2525
crt = gnutls.openpgp_crt_t()
2526
gnutls.openpgp_crt_init(ctypes.byref(crt))
2527
# Import the OpenPGP public key into the certificate
2528
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2529
gnutls.OPENPGP_FMT_RAW)
2530
# Verify the self signature in the key
2531
crtverify = ctypes.c_uint()
2532
gnutls.openpgp_crt_verify_self(crt, 0,
2533
ctypes.byref(crtverify))
2534
if crtverify.value != 0:
2535
gnutls.openpgp_crt_deinit(crt)
2536
raise gnutls.CertificateSecurityError(code
2537
=crtverify.value)
2538
# New buffer for the fingerprint
2539
buf = ctypes.create_string_buffer(20)
2540
buf_len = ctypes.c_size_t()
2541
# Get the fingerprint from the certificate into the buffer
2542
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2543
ctypes.byref(buf_len))
2544
# Deinit the certificate
2545
gnutls.openpgp_crt_deinit(crt)
2546
# Convert the buffer to a Python bytestring
2547
fpr = ctypes.string_at(buf, buf_len.value)
2548
# Convert the bytestring to hexadecimal notation
2549
hex_fpr = binascii.hexlify(fpr).upper()
2550
return hex_fpr
2551
2552
2553
class MultiprocessingMixIn:
2554
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2555
2556
def sub_process_main(self, request, address):
2557
try:
2558
self.finish_request(request, address)
2559
except Exception:
2560
self.handle_error(request, address)
2561
self.close_request(request)
2562
2563
def process_request(self, request, address):
2564
"""Start a new process to process the request."""
2565
proc = multiprocessing.Process(target=self.sub_process_main,
2566
args=(request, address))
2567
proc.start()
2568
return proc
2569
2570
2571
class MultiprocessingMixInWithPipe(MultiprocessingMixIn):
2572
""" adds a pipe to the MixIn """
2573
2574
def process_request(self, request, client_address):
2575
"""Overrides and wraps the original process_request().
2576
2577
This function creates a new pipe in self.pipe
2578
"""
2579
parent_pipe, self.child_pipe = multiprocessing.Pipe()
2580
2581
proc = MultiprocessingMixIn.process_request(self, request,
2582
client_address)
2583
self.child_pipe.close()
2584
self.add_pipe(parent_pipe, proc)
2585
2586
def add_pipe(self, parent_pipe, proc):
2587
"""Dummy function; override as necessary"""
2588
raise NotImplementedError()
2589
2590
2591
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
2592
socketserver.TCPServer):
2593
"""IPv6-capable TCP server. Accepts None as address and/or port
2594
310
logger.debug(u"TCP connection from: %s",
311
unicode(self.client_address))
312
session = gnutls.connection.ClientSession(self.request,
313
gnutls.connection.\
314
X509Credentials())
315
316
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
317
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
318
# "+DHE-DSS"))
319
priority = "SECURE256"
320
321
gnutls.library.functions.gnutls_priority_set_direct\
322
(session._c_object, priority, None);
323
324
try:
325
session.handshake()
326
except gnutls.errors.GNUTLSError, error:
327
logger.debug(u"Handshake failed: %s", error)
328
# Do not run session.bye() here: the session is not
329
# established. Just abandon the request.
330
return
331
try:
332
fpr = fingerprint(peer_certificate(session))
333
except (TypeError, gnutls.errors.GNUTLSError), error:
334
logger.debug(u"Bad certificate: %s", error)
335
session.bye()
336
return
337
logger.debug(u"Fingerprint: %s", fpr)
338
client = None
339
for c in clients:
340
if c.fingerprint == fpr:
341
client = c
342
break
343
# Have to check if client.still_valid(), since it is possible
344
# that the client timed out while establishing the GnuTLS
345
# session.
346
if (not client) or (not client.still_valid()):
347
if client:
348
logger.debug(u"Client %(name)s is invalid",
349
vars(client))
350
else:
351
logger.debug(u"Client not found for fingerprint: %s",
352
fpr)
353
session.bye()
354
return
355
sent_size = 0
356
while sent_size < len(client.secret):
357
sent = session.send(client.secret[sent_size:])
358
logger.debug(u"Sent: %d, remaining: %d",
359
sent, len(client.secret)
360
- (sent_size + sent))
361
sent_size += sent
362
session.bye()
363
364
365
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
366
"""IPv6 TCP server. Accepts 'None' as address and/or port.
2595
367
Attributes:
2596
enabled: Boolean; whether this server is activated yet
2597
interface: None or a network interface name (string)
2598
use_ipv6: Boolean; to use IPv6 or not
368
options: Command line options
369
clients: Set() of Client objects
2599
370
"""
2600
2601
def __init__(self, server_address, RequestHandlerClass,
2602
interface=None,
2603
use_ipv6=True,
2604
socketfd=None):
2605
"""If socketfd is set, use that file descriptor instead of
2606
creating a new one with socket.socket().
2607
"""
2608
self.interface = interface
2609
if use_ipv6:
2610
self.address_family = socket.AF_INET6
2611
if socketfd is not None:
2612
# Save the file descriptor
2613
self.socketfd = socketfd
2614
# Save the original socket.socket() function
2615
self.socket_socket = socket.socket
2616
2617
# To implement --socket, we monkey patch socket.socket.
2618
#
2619
# (When socketserver.TCPServer is a new-style class, we
2620
# could make self.socket into a property instead of monkey
2621
# patching socket.socket.)
2622
#
2623
# Create a one-time-only replacement for socket.socket()
2624
@functools.wraps(socket.socket)
2625
def socket_wrapper(*args, **kwargs):
2626
# Restore original function so subsequent calls are
2627
# not affected.
2628
socket.socket = self.socket_socket
2629
del self.socket_socket
2630
# This time only, return a new socket object from the
2631
# saved file descriptor.
2632
return socket.fromfd(self.socketfd, *args, **kwargs)
2633
# Replace socket.socket() function with wrapper
2634
socket.socket = socket_wrapper
2635
# The socketserver.TCPServer.__init__ will call
2636
# socket.socket(), which might be our replacement,
2637
# socket_wrapper(), if socketfd was set.
2638
socketserver.TCPServer.__init__(self, server_address,
2639
RequestHandlerClass)
2640
371
address_family = socket.AF_INET6
372
def __init__(self, *args, **kwargs):
373
if "options" in kwargs:
374
self.options = kwargs["options"]
375
del kwargs["options"]
376
if "clients" in kwargs:
377
self.clients = kwargs["clients"]
378
del kwargs["clients"]
379
return super(type(self), self).__init__(*args, **kwargs)
2641
380
def server_bind(self):
2642
381
"""This overrides the normal server_bind() function
2643
382
to bind to an interface if one was specified, and also NOT to
2644
383
bind to an address or port if they were not specified."""
2645
global SO_BINDTODEVICE
2646
if self.interface is not None:
2647
if SO_BINDTODEVICE is None:
2648
# Fall back to a hard-coded value which seems to be
2649
# common enough.
2650
logger.warning("SO_BINDTODEVICE not found, trying 25")
2651
SO_BINDTODEVICE = 25
384
if self.options.interface:
385
if not hasattr(socket, "SO_BINDTODEVICE"):
386
# From /usr/include/asm-i486/socket.h
387
socket.SO_BINDTODEVICE = 25
2652
388
try:
2653
self.socket.setsockopt(
2654
socket.SOL_SOCKET, SO_BINDTODEVICE,
2655
(self.interface + "\0").encode("utf-8"))
2656
except socket.error as error:
2657
if error.errno == errno.EPERM:
2658
logger.error("No permission to bind to"
2659
" interface %s", self.interface)
2660
elif error.errno == errno.ENOPROTOOPT:
2661
logger.error("SO_BINDTODEVICE not available;"
2662
" cannot bind to interface %s",
2663
self.interface)
2664
elif error.errno == errno.ENODEV:
2665
logger.error("Interface %s does not exist,"
2666
" cannot bind", self.interface)
389
self.socket.setsockopt(socket.SOL_SOCKET,
390
socket.SO_BINDTODEVICE,
391
self.options.interface)
392
except socket.error, error:
393
if error[0] == errno.EPERM:
394
logger.warning(u"No permission to"
395
u" bind to interface %s",
396
self.options.interface)
2667
397
else:
2668
raise
398
raise error
2669
399
# Only bind(2) the socket if we really need to.
2670
400
if self.server_address[0] or self.server_address[1]:
2671
if self.server_address[1]:
2672
self.allow_reuse_address = True
2673
401
if not self.server_address[0]:
2674
if self.address_family == socket.AF_INET6:
2675
any_address = "::" # in6addr_any
2676
else:
2677
any_address = "0.0.0.0" # INADDR_ANY
2678
self.server_address = (any_address,
402
in6addr_any = "::"
403
self.server_address = (in6addr_any,
2679
404
self.server_address[1])
2680
elif not self.server_address[1]:
2681
self.server_address = (self.server_address[0], 0)
2682
# if self.interface:
2683
# self.server_address = (self.server_address[0],
2684
# 0, # port
2685
# 0, # flowinfo
2686
# if_nametoindex
2687
# (self.interface))
2688
return socketserver.TCPServer.server_bind(self)
2689
2690
2691
class MandosServer(IPv6_TCPServer):
2692
"""Mandos server.
2693
2694
Attributes:
2695
clients: set of Client objects
2696
gnutls_priority GnuTLS priority string
2697
use_dbus: Boolean; to emit D-Bus signals or not
2698
2699
Assumes a GLib.MainLoop event loop.
2700
"""
2701
2702
def __init__(self, server_address, RequestHandlerClass,
2703
interface=None,
2704
use_ipv6=True,
2705
clients=None,
2706
gnutls_priority=None,
2707
use_dbus=True,
2708
socketfd=None):
2709
self.enabled = False
2710
self.clients = clients
2711
if self.clients is None:
2712
self.clients = {}
2713
self.use_dbus = use_dbus
2714
self.gnutls_priority = gnutls_priority
2715
IPv6_TCPServer.__init__(self, server_address,
2716
RequestHandlerClass,
2717
interface=interface,
2718
use_ipv6=use_ipv6,
2719
socketfd=socketfd)
2720
2721
def server_activate(self):
2722
if self.enabled:
2723
return socketserver.TCPServer.server_activate(self)
2724
2725
def enable(self):
2726
self.enabled = True
2727
2728
def add_pipe(self, parent_pipe, proc):
2729
# Call "handle_ipc" for both data and EOF events
2730
GLib.io_add_watch(
2731
GLib.IOChannel.unix_new(parent_pipe.fileno()),
2732
GLib.PRIORITY_DEFAULT, GLib.IO_IN | GLib.IO_HUP,
2733
functools.partial(self.handle_ipc,
2734
parent_pipe=parent_pipe,
2735
proc=proc))
2736
2737
def handle_ipc(self, source, condition,
2738
parent_pipe=None,
2739
proc=None,
2740
client_object=None):
2741
# error, or the other end of multiprocessing.Pipe has closed
2742
if condition & (GLib.IO_ERR | GLib.IO_HUP):
2743
# Wait for other process to exit
2744
proc.join()
2745
return False
2746
2747
# Read a request from the child
2748
request = parent_pipe.recv()
2749
command = request[0]
2750
2751
if command == "init":
2752
key_id = request[1].decode("ascii")
2753
fpr = request[2].decode("ascii")
2754
address = request[3]
2755
2756
for c in self.clients.values():
2757
if key_id == ("E3B0C44298FC1C149AFBF4C8996FB924"
2758
"27AE41E4649B934CA495991B7852B855"):
2759
continue
2760
if key_id and c.key_id == key_id:
2761
client = c
2762
break
2763
if fpr and c.fingerprint == fpr:
2764
client = c
2765
break
2766
else:
2767
logger.info("Client not found for key ID: %s, address"
2768
": %s", key_id or fpr, address)
2769
if self.use_dbus:
2770
# Emit D-Bus signal
2771
mandos_dbus_service.ClientNotFound(key_id or fpr,
2772
address[0])
2773
parent_pipe.send(False)
2774
return False
2775
2776
GLib.io_add_watch(
2777
GLib.IOChannel.unix_new(parent_pipe.fileno()),
2778
GLib.PRIORITY_DEFAULT, GLib.IO_IN | GLib.IO_HUP,
2779
functools.partial(self.handle_ipc,
2780
parent_pipe=parent_pipe,
2781
proc=proc,
2782
client_object=client))
2783
parent_pipe.send(True)
2784
# remove the old hook in favor of the new above hook on
2785
# same fileno
2786
return False
2787
if command == "funcall":
2788
funcname = request[1]
2789
args = request[2]
2790
kwargs = request[3]
2791
2792
parent_pipe.send(("data", getattr(client_object,
2793
funcname)(*args,
2794
**kwargs)))
2795
2796
if command == "getattr":
2797
attrname = request[1]
2798
if isinstance(client_object.__getattribute__(attrname),
2799
collections.abc.Callable):
2800
parent_pipe.send(("function", ))
2801
else:
2802
parent_pipe.send((
2803
"data", client_object.__getattribute__(attrname)))
2804
2805
if command == "setattr":
2806
attrname = request[1]
2807
value = request[2]
2808
setattr(client_object, attrname, value)
2809
2810
return True
2811
2812
2813
def rfc3339_duration_to_delta(duration):
2814
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2815
2816
>>> timedelta = datetime.timedelta
2817
>>> rfc3339_duration_to_delta("P7D") == timedelta(7)
2818
True
2819
>>> rfc3339_duration_to_delta("PT60S") == timedelta(0, 60)
2820
True
2821
>>> rfc3339_duration_to_delta("PT60M") == timedelta(0, 3600)
2822
True
2823
>>> rfc3339_duration_to_delta("PT24H") == timedelta(1)
2824
True
2825
>>> rfc3339_duration_to_delta("P1W") == timedelta(7)
2826
True
2827
>>> rfc3339_duration_to_delta("PT5M30S") == timedelta(0, 330)
2828
True
2829
>>> rfc3339_duration_to_delta("P1DT3M20S") == timedelta(1, 200)
2830
True
2831
>>> del timedelta
2832
"""
2833
2834
# Parsing an RFC 3339 duration with regular expressions is not
2835
# possible - there would have to be multiple places for the same
2836
# values, like seconds. The current code, while more esoteric, is
2837
# cleaner without depending on a parsing library. If Python had a
2838
# built-in library for parsing we would use it, but we'd like to
2839
# avoid excessive use of external libraries.
2840
2841
# New type for defining tokens, syntax, and semantics all-in-one
2842
Token = collections.namedtuple("Token", (
2843
"regexp", # To match token; if "value" is not None, must have
2844
# a "group" containing digits
2845
"value", # datetime.timedelta or None
2846
"followers")) # Tokens valid after this token
2847
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2848
# the "duration" ABNF definition in RFC 3339, Appendix A.
2849
token_end = Token(re.compile(r"$"), None, frozenset())
2850
token_second = Token(re.compile(r"(\d+)S"),
2851
datetime.timedelta(seconds=1),
2852
frozenset((token_end, )))
2853
token_minute = Token(re.compile(r"(\d+)M"),
2854
datetime.timedelta(minutes=1),
2855
frozenset((token_second, token_end)))
2856
token_hour = Token(re.compile(r"(\d+)H"),
2857
datetime.timedelta(hours=1),
2858
frozenset((token_minute, token_end)))
2859
token_time = Token(re.compile(r"T"),
2860
None,
2861
frozenset((token_hour, token_minute,
2862
token_second)))
2863
token_day = Token(re.compile(r"(\d+)D"),
2864
datetime.timedelta(days=1),
2865
frozenset((token_time, token_end)))
2866
token_month = Token(re.compile(r"(\d+)M"),
2867
datetime.timedelta(weeks=4),
2868
frozenset((token_day, token_end)))
2869
token_year = Token(re.compile(r"(\d+)Y"),
2870
datetime.timedelta(weeks=52),
2871
frozenset((token_month, token_end)))
2872
token_week = Token(re.compile(r"(\d+)W"),
2873
datetime.timedelta(weeks=1),
2874
frozenset((token_end, )))
2875
token_duration = Token(re.compile(r"P"), None,
2876
frozenset((token_year, token_month,
2877
token_day, token_time,
2878
token_week)))
2879
# Define starting values:
2880
# Value so far
2881
value = datetime.timedelta()
2882
found_token = None
2883
# Following valid tokens
2884
followers = frozenset((token_duration, ))
2885
# String left to parse
2886
s = duration
2887
# Loop until end token is found
2888
while found_token is not token_end:
2889
# Search for any currently valid tokens
2890
for token in followers:
2891
match = token.regexp.match(s)
2892
if match is not None:
2893
# Token found
2894
if token.value is not None:
2895
# Value found, parse digits
2896
factor = int(match.group(1), 10)
2897
# Add to value so far
2898
value += factor * token.value
2899
# Strip token from string
2900
s = token.regexp.sub("", s, 1)
2901
# Go to found token
2902
found_token = token
2903
# Set valid next tokens
2904
followers = found_token.followers
2905
break
2906
else:
2907
# No currently valid tokens were found
2908
raise ValueError("Invalid RFC 3339 duration: {!r}"
2909
.format(duration))
2910
# End token found
2911
return value
405
elif self.server_address[1] is None:
406
self.server_address = (self.server_address[0],
407
0)
408
return super(type(self), self).server_bind()
2912
409
2913
410
2914
411
def string_to_delta(interval):
2915
412
"""Parse a string and return a datetime.timedelta
2916
413
2917
>>> string_to_delta("7d") == datetime.timedelta(7)
2918
True
2919
>>> string_to_delta("60s") == datetime.timedelta(0, 60)
2920
True
2921
>>> string_to_delta("60m") == datetime.timedelta(0, 3600)
2922
True
2923
>>> string_to_delta("24h") == datetime.timedelta(1)
2924
True
2925
>>> string_to_delta("1w") == datetime.timedelta(7)
2926
True
2927
>>> string_to_delta("5m 30s") == datetime.timedelta(0, 330)
2928
True
414
>>> string_to_delta('7d')
415
datetime.timedelta(7)
416
>>> string_to_delta('60s')
417
datetime.timedelta(0, 60)
418
>>> string_to_delta('60m')
419
datetime.timedelta(0, 3600)
420
>>> string_to_delta('24h')
421
datetime.timedelta(1)
422
>>> string_to_delta(u'1w')
423
datetime.timedelta(7)
2929
424
"""
2930
2931
try:
2932
return rfc3339_duration_to_delta(interval)
2933
except ValueError:
2934
pass
2935
2936
timevalue = datetime.timedelta(0)
2937
for s in interval.split():
2938
try:
2939
suffix = s[-1]
2940
value = int(s[:-1])
2941
if suffix == "d":
2942
delta = datetime.timedelta(value)
2943
elif suffix == "s":
2944
delta = datetime.timedelta(0, value)
2945
elif suffix == "m":
2946
delta = datetime.timedelta(0, 0, 0, 0, value)
2947
elif suffix == "h":
2948
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
2949
elif suffix == "w":
2950
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
2951
else:
2952
raise ValueError("Unknown suffix {!r}".format(suffix))
2953
except IndexError as e:
2954
raise ValueError(*(e.args))
2955
timevalue += delta
2956
return timevalue
2957
2958
2959
def daemon(nochdir=False, noclose=False):
2960
"""See daemon(3). Standard BSD Unix function.
2961
2962
This should really exist as os.daemon, but it doesn't (yet)."""
2963
if os.fork():
2964
sys.exit()
2965
os.setsid()
2966
if not nochdir:
2967
os.chdir("/")
2968
if os.fork():
2969
sys.exit()
2970
if not noclose:
2971
# Close all standard open file descriptors
2972
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2973
if not stat.S_ISCHR(os.fstat(null).st_mode):
2974
raise OSError(errno.ENODEV,
2975
"{} not a character device"
2976
.format(os.devnull))
2977
os.dup2(null, sys.stdin.fileno())
2978
os.dup2(null, sys.stdout.fileno())
2979
os.dup2(null, sys.stderr.fileno())
2980
if null > 2:
2981
os.close(null)
2982
2983
2984
def main():
2985
2986
##################################################################
2987
# Parsing of options, both command line and config file
2988
2989
parser = argparse.ArgumentParser()
2990
parser.add_argument("-v", "--version", action="version",
2991
version="%(prog)s {}".format(version),
2992
help="show version number and exit")
2993
parser.add_argument("-i", "--interface", metavar="IF",
2994
help="Bind to interface IF")
2995
parser.add_argument("-a", "--address",
2996
help="Address to listen for requests on")
2997
parser.add_argument("-p", "--port", type=int,
2998
help="Port number to receive requests on")
2999
parser.add_argument("--check", action="store_true",
3000
help="Run self-test")
3001
parser.add_argument("--debug", action="store_true",
3002
help="Debug mode; run in foreground and log"
3003
" to terminal", default=None)
3004
parser.add_argument("--debuglevel", metavar="LEVEL",
3005
help="Debug level for stdout output")
3006
parser.add_argument("--priority", help="GnuTLS"
3007
" priority string (see GnuTLS documentation)")
3008
parser.add_argument("--servicename",
3009
metavar="NAME", help="Zeroconf service name")
3010
parser.add_argument("--configdir",
3011
default="/etc/mandos", metavar="DIR",
3012
help="Directory to search for configuration"
3013
" files")
3014
parser.add_argument("--no-dbus", action="store_false",
3015
dest="use_dbus", help="Do not provide D-Bus"
3016
" system bus interface", default=None)
3017
parser.add_argument("--no-ipv6", action="store_false",
3018
dest="use_ipv6", help="Do not use IPv6",
3019
default=None)
3020
parser.add_argument("--no-restore", action="store_false",
3021
dest="restore", help="Do not restore stored"
3022
" state", default=None)
3023
parser.add_argument("--socket", type=int,
3024
help="Specify a file descriptor to a network"
3025
" socket to use instead of creating one")
3026
parser.add_argument("--statedir", metavar="DIR",
3027
help="Directory to save/restore state in")
3028
parser.add_argument("--foreground", action="store_true",
3029
help="Run in foreground", default=None)
3030
parser.add_argument("--no-zeroconf", action="store_false",
3031
dest="zeroconf", help="Do not use Zeroconf",
3032
default=None)
3033
3034
options = parser.parse_args()
3035
3036
# Default values for config file for server-global settings
3037
if gnutls.has_rawpk:
3038
priority = ("SECURE128:!CTYPE-X.509:+CTYPE-RAWPK:!RSA"
3039
":!VERS-ALL:+VERS-TLS1.3:%PROFILE_ULTRA")
3040
else:
3041
priority = ("SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
3042
":+SIGN-DSA-SHA256")
3043
server_defaults = {"interface": "",
3044
"address": "",
3045
"port": "",
3046
"debug": "False",
3047
"priority": priority,
3048
"servicename": "Mandos",
3049
"use_dbus": "True",
3050
"use_ipv6": "True",
3051
"debuglevel": "",
3052
"restore": "True",
3053
"socket": "",
3054
"statedir": "/var/lib/mandos",
3055
"foreground": "False",
3056
"zeroconf": "True",
3057
}
3058
del priority
3059
3060
# Parse config file for server-global settings
3061
server_config = configparser.ConfigParser(server_defaults)
3062
del server_defaults
3063
server_config.read(os.path.join(options.configdir, "mandos.conf"))
3064
# Convert the ConfigParser object to a dict
3065
server_settings = server_config.defaults()
3066
# Use the appropriate methods on the non-string config options
3067
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3068
"foreground", "zeroconf"):
3069
server_settings[option] = server_config.getboolean("DEFAULT",
3070
option)
3071
if server_settings["port"]:
3072
server_settings["port"] = server_config.getint("DEFAULT",
3073
"port")
3074
if server_settings["socket"]:
3075
server_settings["socket"] = server_config.getint("DEFAULT",
3076
"socket")
3077
# Later, stdin will, and stdout and stderr might, be dup'ed
3078
# over with an opened os.devnull. But we don't want this to
3079
# happen with a supplied network socket.
3080
if 0 <= server_settings["socket"] <= 2:
3081
server_settings["socket"] = os.dup(server_settings
3082
["socket"])
3083
del server_config
3084
3085
# Override the settings from the config file with command line
3086
# options, if set.
3087
for option in ("interface", "address", "port", "debug",
3088
"priority", "servicename", "configdir", "use_dbus",
3089
"use_ipv6", "debuglevel", "restore", "statedir",
3090
"socket", "foreground", "zeroconf"):
3091
value = getattr(options, option)
3092
if value is not None:
3093
server_settings[option] = value
3094
del options
3095
# Force all strings to be unicode
3096
for option in server_settings.keys():
3097
if isinstance(server_settings[option], bytes):
3098
server_settings[option] = (server_settings[option]
3099
.decode("utf-8"))
3100
# Force all boolean options to be boolean
3101
for option in ("debug", "use_dbus", "use_ipv6", "restore",
3102
"foreground", "zeroconf"):
3103
server_settings[option] = bool(server_settings[option])
3104
# Debug implies foreground
3105
if server_settings["debug"]:
3106
server_settings["foreground"] = True
3107
# Now we have our good server settings in "server_settings"
3108
3109
##################################################################
3110
3111
if (not server_settings["zeroconf"]
3112
and not (server_settings["port"]
3113
or server_settings["socket"] != "")):
3114
parser.error("Needs port or socket to work without Zeroconf")
3115
3116
# For convenience
3117
debug = server_settings["debug"]
3118
debuglevel = server_settings["debuglevel"]
3119
use_dbus = server_settings["use_dbus"]
3120
use_ipv6 = server_settings["use_ipv6"]
3121
stored_state_path = os.path.join(server_settings["statedir"],
3122
stored_state_file)
3123
foreground = server_settings["foreground"]
3124
zeroconf = server_settings["zeroconf"]
3125
3126
if debug:
3127
initlogger(debug, logging.DEBUG)
3128
else:
3129
if not debuglevel:
3130
initlogger(debug)
3131
else:
3132
level = getattr(logging, debuglevel.upper())
3133
initlogger(debug, level)
3134
3135
if server_settings["servicename"] != "Mandos":
3136
syslogger.setFormatter(
3137
logging.Formatter("Mandos ({}) [%(process)d]:"
3138
" %(levelname)s: %(message)s".format(
3139
server_settings["servicename"])))
3140
3141
# Parse config file with clients
3142
client_config = configparser.ConfigParser(Client.client_defaults)
3143
client_config.read(os.path.join(server_settings["configdir"],
3144
"clients.conf"))
3145
3146
global mandos_dbus_service
3147
mandos_dbus_service = None
3148
3149
socketfd = None
3150
if server_settings["socket"] != "":
3151
socketfd = server_settings["socket"]
3152
tcp_server = MandosServer(
3153
(server_settings["address"], server_settings["port"]),
3154
ClientHandler,
3155
interface=(server_settings["interface"] or None),
3156
use_ipv6=use_ipv6,
3157
gnutls_priority=server_settings["priority"],
3158
use_dbus=use_dbus,
3159
socketfd=socketfd)
3160
if not foreground:
3161
pidfilename = "/run/mandos.pid"
3162
if not os.path.isdir("/run/."):
3163
pidfilename = "/var/run/mandos.pid"
3164
pidfile = None
3165
try:
3166
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
3167
except IOError as e:
3168
logger.error("Could not open file %r", pidfilename,
3169
exc_info=e)
3170
3171
for name, group in (("_mandos", "_mandos"),
3172
("mandos", "mandos"),
3173
("nobody", "nogroup")):
3174
try:
3175
uid = pwd.getpwnam(name).pw_uid
3176
gid = pwd.getpwnam(group).pw_gid
3177
break
3178
except KeyError:
3179
continue
3180
else:
3181
uid = 65534
3182
gid = 65534
3183
try:
3184
os.setgid(gid)
3185
os.setuid(uid)
3186
if debug:
3187
logger.debug("Did setuid/setgid to {}:{}".format(uid,
3188
gid))
3189
except OSError as error:
3190
logger.warning("Failed to setuid/setgid to {}:{}: {}"
3191
.format(uid, gid, os.strerror(error.errno)))
3192
if error.errno != errno.EPERM:
3193
raise
3194
3195
if debug:
3196
# Enable all possible GnuTLS debugging
3197
3198
# "Use a log level over 10 to enable all debugging options."
3199
# - GnuTLS manual
3200
gnutls.global_set_log_level(11)
3201
3202
@gnutls.log_func
3203
def debug_gnutls(level, string):
3204
logger.debug("GnuTLS: %s",
3205
string[:-1].decode("utf-8",
3206
errors="replace"))
3207
3208
gnutls.global_set_log_function(debug_gnutls)
3209
3210
# Redirect stdin so all checkers get /dev/null
3211
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
3212
os.dup2(null, sys.stdin.fileno())
3213
if null > 2:
3214
os.close(null)
3215
3216
# Need to fork before connecting to D-Bus
3217
if not foreground:
3218
# Close all input and output, do double fork, etc.
3219
daemon()
3220
3221
if gi.version_info < (3, 10, 2):
3222
# multiprocessing will use threads, so before we use GLib we
3223
# need to inform GLib that threads will be used.
3224
GLib.threads_init()
3225
3226
global main_loop
3227
# From the Avahi example code
3228
DBusGMainLoop(set_as_default=True)
3229
main_loop = GLib.MainLoop()
425
try:
426
suffix=unicode(interval[-1])
427
value=int(interval[:-1])
428
if suffix == u"d":
429
delta = datetime.timedelta(value)
430
elif suffix == u"s":
431
delta = datetime.timedelta(0, value)
432
elif suffix == u"m":
433
delta = datetime.timedelta(0, 0, 0, 0, value)
434
elif suffix == u"h":
435
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
436
elif suffix == u"w":
437
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
438
else:
439
raise ValueError
440
except (ValueError, IndexError):
441
raise ValueError
442
return delta
443
444
445
def add_service():
446
"""From the Avahi server example code"""
447
global group, serviceName, serviceType, servicePort, serviceTXT, \
448
domain, host
449
if group is None:
450
group = dbus.Interface(
451
bus.get_object( avahi.DBUS_NAME,
452
server.EntryGroupNew()),
453
avahi.DBUS_INTERFACE_ENTRY_GROUP)
454
group.connect_to_signal('StateChanged',
455
entry_group_state_changed)
456
logger.debug(u"Adding service '%s' of type '%s' ...",
457
serviceName, serviceType)
458
459
group.AddService(
460
serviceInterface, # interface
461
avahi.PROTO_INET6, # protocol
462
dbus.UInt32(0), # flags
463
serviceName, serviceType,
464
domain, host,
465
dbus.UInt16(servicePort),
466
avahi.string_array_to_txt_array(serviceTXT))
467
group.Commit()
468
469
470
def remove_service():
471
"""From the Avahi server example code"""
472
global group
473
474
if not group is None:
475
group.Reset()
476
477
478
def server_state_changed(state):
479
"""From the Avahi server example code"""
480
if state == avahi.SERVER_COLLISION:
481
logger.warning(u"Server name collision")
482
remove_service()
483
elif state == avahi.SERVER_RUNNING:
484
add_service()
485
486
487
def entry_group_state_changed(state, error):
488
"""From the Avahi server example code"""
489
global serviceName, server, rename_count
490
491
logger.debug(u"state change: %i", state)
492
493
if state == avahi.ENTRY_GROUP_ESTABLISHED:
494
logger.debug(u"Service established.")
495
elif state == avahi.ENTRY_GROUP_COLLISION:
496
497
rename_count = rename_count - 1
498
if rename_count > 0:
499
name = server.GetAlternativeServiceName(name)
500
logger.warning(u"Service name collision, "
501
u"changing name to '%s' ...", name)
502
remove_service()
503
add_service()
504
505
else:
506
logger.error(u"No suitable service name found "
507
u"after %i retries, exiting.",
508
n_rename)
509
main_loop.quit()
510
elif state == avahi.ENTRY_GROUP_FAILURE:
511
logger.error(u"Error in group state changed %s",
512
unicode(error))
513
main_loop.quit()
514
return
515
516
517
def if_nametoindex(interface):
518
"""Call the C function if_nametoindex()"""
519
try:
520
libc = ctypes.cdll.LoadLibrary("libc.so.6")
521
return libc.if_nametoindex(interface)
522
except (OSError, AttributeError):
523
if "struct" not in sys.modules:
524
import struct
525
if "fcntl" not in sys.modules:
526
import fcntl
527
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
528
s = socket.socket()
529
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
530
struct.pack("16s16x", interface))
531
s.close()
532
interface_index = struct.unpack("I", ifreq[16:20])[0]
533
return interface_index
534
535
536
if __name__ == '__main__':
537
parser = OptionParser()
538
parser.add_option("-i", "--interface", type="string",
539
default=None, metavar="IF",
540
help="Bind to interface IF")
541
parser.add_option("--cert", type="string", default="cert.pem",
542
metavar="FILE",
543
help="Public key certificate PEM file to use")
544
parser.add_option("--key", type="string", default="key.pem",
545
metavar="FILE",
546
help="Private key PEM file to use")
547
parser.add_option("--ca", type="string", default="ca.pem",
548
metavar="FILE",
549
help="Certificate Authority certificate PEM file to use")
550
parser.add_option("--crl", type="string", default="crl.pem",
551
metavar="FILE",
552
help="Certificate Revokation List PEM file to use")
553
parser.add_option("-p", "--port", type="int", default=None,
554
help="Port number to receive requests on")
555
parser.add_option("--timeout", type="string", # Parsed later
556
default="1h",
557
help="Amount of downtime allowed for clients")
558
parser.add_option("--interval", type="string", # Parsed later
559
default="5m",
560
help="How often to check that a client is up")
561
parser.add_option("--check", action="store_true", default=False,
562
help="Run self-test")
563
parser.add_option("--debug", action="store_true", default=False,
564
help="Debug mode")
565
(options, args) = parser.parse_args()
566
567
if options.check:
568
import doctest
569
doctest.testmod()
570
sys.exit()
571
572
# Parse the time arguments
573
try:
574
options.timeout = string_to_delta(options.timeout)
575
except ValueError:
576
parser.error("option --timeout: Unparseable time")
577
try:
578
options.interval = string_to_delta(options.interval)
579
except ValueError:
580
parser.error("option --interval: Unparseable time")
581
582
# Parse config file
583
defaults = { "checker": "sleep 1; fping -q -- %%(fqdn)s" }
584
client_config = ConfigParser.SafeConfigParser(defaults)
585
#client_config.readfp(open("secrets.conf"), "secrets.conf")
586
client_config.read("mandos-clients.conf")
587
588
# From the Avahi server example code
589
DBusGMainLoop(set_as_default=True )
590
main_loop = gobject.MainLoop()
3230
591
bus = dbus.SystemBus()
3231
# End of Avahi example code
3232
if use_dbus:
3233
try:
3234
bus_name = dbus.service.BusName("se.recompile.Mandos",
3235
bus,
3236
do_not_queue=True)
3237
old_bus_name = dbus.service.BusName(
3238
"se.bsnet.fukt.Mandos", bus,
3239
do_not_queue=True)
3240
except dbus.exceptions.DBusException as e:
3241
logger.error("Disabling D-Bus:", exc_info=e)
3242
use_dbus = False
3243
server_settings["use_dbus"] = False
3244
tcp_server.use_dbus = False
3245
if zeroconf:
3246
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3247
service = AvahiServiceToSyslog(
3248
name=server_settings["servicename"],
3249
servicetype="_mandos._tcp",
3250
protocol=protocol,
3251
bus=bus)
3252
if server_settings["interface"]:
3253
service.interface = if_nametoindex(
3254
server_settings["interface"].encode("utf-8"))
3255
3256
global multiprocessing_manager
3257
multiprocessing_manager = multiprocessing.Manager()
3258
3259
client_class = Client
3260
if use_dbus:
3261
client_class = functools.partial(ClientDBus, bus=bus)
3262
3263
client_settings = Client.config_parser(client_config)
3264
old_client_settings = {}
3265
clients_data = {}
3266
3267
# This is used to redirect stdout and stderr for checker processes
3268
global wnull
3269
wnull = open(os.devnull, "w") # A writable /dev/null
3270
# Only used if server is running in foreground but not in debug
3271
# mode
3272
if debug or not foreground:
3273
wnull.close()
3274
3275
# Get client data and settings from last running state.
3276
if server_settings["restore"]:
3277
try:
3278
with open(stored_state_path, "rb") as stored_state:
3279
if sys.version_info.major == 2:
3280
clients_data, old_client_settings = pickle.load(
3281
stored_state)
3282
else:
3283
bytes_clients_data, bytes_old_client_settings = (
3284
pickle.load(stored_state, encoding="bytes"))
3285
# Fix bytes to strings
3286
# clients_data
3287
# .keys()
3288
clients_data = {(key.decode("utf-8")
3289
if isinstance(key, bytes)
3290
else key): value
3291
for key, value in
3292
bytes_clients_data.items()}
3293
del bytes_clients_data
3294
for key in clients_data:
3295
value = {(k.decode("utf-8")
3296
if isinstance(k, bytes) else k): v
3297
for k, v in
3298
clients_data[key].items()}
3299
clients_data[key] = value
3300
# .client_structure
3301
value["client_structure"] = [
3302
(s.decode("utf-8")
3303
if isinstance(s, bytes)
3304
else s) for s in
3305
value["client_structure"]]
3306
# .name, .host, and .checker_command
3307
for k in ("name", "host", "checker_command"):
3308
if isinstance(value[k], bytes):
3309
value[k] = value[k].decode("utf-8")
3310
if "key_id" not in value:
3311
value["key_id"] = ""
3312
elif "fingerprint" not in value:
3313
value["fingerprint"] = ""
3314
# old_client_settings
3315
# .keys()
3316
old_client_settings = {
3317
(key.decode("utf-8")
3318
if isinstance(key, bytes)
3319
else key): value
3320
for key, value in
3321
bytes_old_client_settings.items()}
3322
del bytes_old_client_settings
3323
# .host and .checker_command
3324
for value in old_client_settings.values():
3325
for attribute in ("host", "checker_command"):
3326
if isinstance(value[attribute], bytes):
3327
value[attribute] = (value[attribute]
3328
.decode("utf-8"))
3329
os.remove(stored_state_path)
3330
except IOError as e:
3331
if e.errno == errno.ENOENT:
3332
logger.warning("Could not load persistent state:"
3333
" {}".format(os.strerror(e.errno)))
3334
else:
3335
logger.critical("Could not load persistent state:",
3336
exc_info=e)
3337
raise
3338
except EOFError as e:
3339
logger.warning("Could not load persistent state: "
3340
"EOFError:",
3341
exc_info=e)
3342
3343
with PGPEngine() as pgp:
3344
for client_name, client in clients_data.items():
3345
# Skip removed clients
3346
if client_name not in client_settings:
3347
continue
3348
3349
# Decide which value to use after restoring saved state.
3350
# We have three different values: Old config file,
3351
# new config file, and saved state.
3352
# New config value takes precedence if it differs from old
3353
# config value, otherwise use saved state.
3354
for name, value in client_settings[client_name].items():
3355
try:
3356
# For each value in new config, check if it
3357
# differs from the old config value (Except for
3358
# the "secret" attribute)
3359
if (name != "secret"
3360
and (value !=
3361
old_client_settings[client_name][name])):
3362
client[name] = value
3363
except KeyError:
3364
pass
3365
3366
# Clients who has passed its expire date can still be
3367
# enabled if its last checker was successful. A Client
3368
# whose checker succeeded before we stored its state is
3369
# assumed to have successfully run all checkers during
3370
# downtime.
3371
if client["enabled"]:
3372
if datetime.datetime.utcnow() >= client["expires"]:
3373
if not client["last_checked_ok"]:
3374
logger.warning(
3375
"disabling client {} - Client never "
3376
"performed a successful checker".format(
3377
client_name))
3378
client["enabled"] = False
3379
elif client["last_checker_status"] != 0:
3380
logger.warning(
3381
"disabling client {} - Client last"
3382
" checker failed with error code"
3383
" {}".format(
3384
client_name,
3385
client["last_checker_status"]))
3386
client["enabled"] = False
3387
else:
3388
client["expires"] = (
3389
datetime.datetime.utcnow()
3390
+ client["timeout"])
3391
logger.debug("Last checker succeeded,"
3392
" keeping {} enabled".format(
3393
client_name))
3394
try:
3395
client["secret"] = pgp.decrypt(
3396
client["encrypted_secret"],
3397
client_settings[client_name]["secret"])
3398
except PGPError:
3399
# If decryption fails, we use secret from new settings
3400
logger.debug("Failed to decrypt {} old secret".format(
3401
client_name))
3402
client["secret"] = (client_settings[client_name]
3403
["secret"])
3404
3405
# Add/remove clients based on new changes made to config
3406
for client_name in (set(old_client_settings)
3407
- set(client_settings)):
3408
del clients_data[client_name]
3409
for client_name in (set(client_settings)
3410
- set(old_client_settings)):
3411
clients_data[client_name] = client_settings[client_name]
3412
3413
# Create all client objects
3414
for client_name, client in clients_data.items():
3415
tcp_server.clients[client_name] = client_class(
3416
name=client_name,
3417
settings=client,
3418
server_settings=server_settings)
3419
3420
if not tcp_server.clients:
3421
logger.warning("No clients defined")
3422
3423
if not foreground:
3424
if pidfile is not None:
3425
pid = os.getpid()
3426
try:
3427
with pidfile:
3428
print(pid, file=pidfile)
3429
except IOError:
3430
logger.error("Could not write to file %r with PID %d",
3431
pidfilename, pid)
3432
del pidfile
3433
del pidfilename
3434
3435
for termsig in (signal.SIGHUP, signal.SIGTERM):
3436
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3437
lambda: main_loop.quit() and False)
3438
3439
if use_dbus:
3440
3441
@alternate_dbus_interfaces(
3442
{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3443
class MandosDBusService(DBusObjectWithObjectManager):
3444
"""A D-Bus proxy object"""
3445
3446
def __init__(self):
3447
dbus.service.Object.__init__(self, bus, "/")
3448
3449
_interface = "se.recompile.Mandos"
3450
3451
@dbus.service.signal(_interface, signature="o")
3452
def ClientAdded(self, objpath):
3453
"D-Bus signal"
3454
pass
3455
3456
@dbus.service.signal(_interface, signature="ss")
3457
def ClientNotFound(self, key_id, address):
3458
"D-Bus signal"
3459
pass
3460
3461
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3462
"true"})
3463
@dbus.service.signal(_interface, signature="os")
3464
def ClientRemoved(self, objpath, name):
3465
"D-Bus signal"
3466
pass
3467
3468
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3469
"true"})
3470
@dbus.service.method(_interface, out_signature="ao")
3471
def GetAllClients(self):
3472
"D-Bus method"
3473
return dbus.Array(c.dbus_object_path for c in
3474
tcp_server.clients.values())
3475
3476
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3477
"true"})
3478
@dbus.service.method(_interface,
3479
out_signature="a{oa{sv}}")
3480
def GetAllClientsWithProperties(self):
3481
"D-Bus method"
3482
return dbus.Dictionary(
3483
{c.dbus_object_path: c.GetAll(
3484
"se.recompile.Mandos.Client")
3485
for c in tcp_server.clients.values()},
3486
signature="oa{sv}")
3487
3488
@dbus.service.method(_interface, in_signature="o")
3489
def RemoveClient(self, object_path):
3490
"D-Bus method"
3491
for c in tcp_server.clients.values():
3492
if c.dbus_object_path == object_path:
3493
del tcp_server.clients[c.name]
3494
c.remove_from_connection()
3495
# Don't signal the disabling
3496
c.disable(quiet=True)
3497
# Emit D-Bus signal for removal
3498
self.client_removed_signal(c)
3499
return
3500
raise KeyError(object_path)
3501
3502
del _interface
3503
3504
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3505
out_signature="a{oa{sa{sv}}}")
3506
def GetManagedObjects(self):
3507
"""D-Bus method"""
3508
return dbus.Dictionary(
3509
{client.dbus_object_path:
3510
dbus.Dictionary(
3511
{interface: client.GetAll(interface)
3512
for interface in
3513
client._get_all_interface_names()})
3514
for client in tcp_server.clients.values()})
3515
3516
def client_added_signal(self, client):
3517
"""Send the new standard signal and the old signal"""
3518
if use_dbus:
3519
# New standard signal
3520
self.InterfacesAdded(
3521
client.dbus_object_path,
3522
dbus.Dictionary(
3523
{interface: client.GetAll(interface)
3524
for interface in
3525
client._get_all_interface_names()}))
3526
# Old signal
3527
self.ClientAdded(client.dbus_object_path)
3528
3529
def client_removed_signal(self, client):
3530
"""Send the new standard signal and the old signal"""
3531
if use_dbus:
3532
# New standard signal
3533
self.InterfacesRemoved(
3534
client.dbus_object_path,
3535
client._get_all_interface_names())
3536
# Old signal
3537
self.ClientRemoved(client.dbus_object_path,
3538
client.name)
3539
3540
mandos_dbus_service = MandosDBusService()
3541
3542
# Save modules to variables to exempt the modules from being
3543
# unloaded before the function registered with atexit() is run.
3544
mp = multiprocessing
3545
wn = wnull
3546
3547
def cleanup():
3548
"Cleanup function; run on exit"
3549
if zeroconf:
3550
service.cleanup()
3551
3552
mp.active_children()
3553
wn.close()
3554
if not (tcp_server.clients or client_settings):
3555
return
3556
3557
# Store client before exiting. Secrets are encrypted with key
3558
# based on what config file has. If config file is
3559
# removed/edited, old secret will thus be unrecovable.
3560
clients = {}
3561
with PGPEngine() as pgp:
3562
for client in tcp_server.clients.values():
3563
key = client_settings[client.name]["secret"]
3564
client.encrypted_secret = pgp.encrypt(client.secret,
3565
key)
3566
client_dict = {}
3567
3568
# A list of attributes that can not be pickled
3569
# + secret.
3570
exclude = {"bus", "changedstate", "secret",
3571
"checker", "server_settings"}
3572
for name, typ in inspect.getmembers(dbus.service
3573
.Object):
3574
exclude.add(name)
3575
3576
client_dict["encrypted_secret"] = (client
3577
.encrypted_secret)
3578
for attr in client.client_structure:
3579
if attr not in exclude:
3580
client_dict[attr] = getattr(client, attr)
3581
3582
clients[client.name] = client_dict
3583
del client_settings[client.name]["secret"]
3584
3585
try:
3586
with tempfile.NamedTemporaryFile(
3587
mode="wb",
3588
suffix=".pickle",
3589
prefix="clients-",
3590
dir=os.path.dirname(stored_state_path),
3591
delete=False) as stored_state:
3592
pickle.dump((clients, client_settings), stored_state,
3593
protocol=2)
3594
tempname = stored_state.name
3595
os.rename(tempname, stored_state_path)
3596
except (IOError, OSError) as e:
3597
if not debug:
3598
try:
3599
os.remove(tempname)
3600
except NameError:
3601
pass
3602
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
3603
logger.warning("Could not save persistent state: {}"
3604
.format(os.strerror(e.errno)))
3605
else:
3606
logger.warning("Could not save persistent state:",
3607
exc_info=e)
3608
raise
3609
3610
# Delete all clients, and settings from config
3611
while tcp_server.clients:
3612
name, client = tcp_server.clients.popitem()
3613
if use_dbus:
3614
client.remove_from_connection()
3615
# Don't signal the disabling
3616
client.disable(quiet=True)
3617
# Emit D-Bus signal for removal
3618
if use_dbus:
3619
mandos_dbus_service.client_removed_signal(client)
3620
client_settings.clear()
3621
3622
atexit.register(cleanup)
3623
3624
for client in tcp_server.clients.values():
3625
if use_dbus:
3626
# Emit D-Bus signal for adding
3627
mandos_dbus_service.client_added_signal(client)
3628
# Need to initiate checking of clients
3629
if client.enabled:
3630
client.init_checker()
3631
3632
tcp_server.enable()
3633
tcp_server.server_activate()
3634
3635
# Find out what port we got
3636
if zeroconf:
3637
service.port = tcp_server.socket.getsockname()[1]
3638
if use_ipv6:
3639
logger.info("Now listening on address %r, port %d,"
3640
" flowinfo %d, scope_id %d",
3641
*tcp_server.socket.getsockname())
3642
else: # IPv4
3643
logger.info("Now listening on address %r, port %d",
3644
*tcp_server.socket.getsockname())
3645
3646
# service.interface = tcp_server.socket.getsockname()[3]
3647
592
server = dbus.Interface(
593
bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
594
avahi.DBUS_INTERFACE_SERVER )
595
# End of Avahi example code
596
597
debug = options.debug
598
599
clients = Set()
600
def remove_from_clients(client):
601
clients.remove(client)
602
if not clients:
603
logger.debug(u"No clients left, exiting")
604
main_loop.quit()
605
606
clients.update(Set(Client(name=section, options=options,
607
stop_hook = remove_from_clients,
608
**(dict(client_config\
609
.items(section))))
610
for section in client_config.sections()))
611
for client in clients:
612
client.start()
613
614
tcp_server = IPv6_TCPServer((None, options.port),
615
tcp_handler,
616
options=options,
617
clients=clients)
618
# Find out what random port we got
619
servicePort = tcp_server.socket.getsockname()[1]
620
logger.debug(u"Now listening on port %d", servicePort)
621
622
if options.interface is not None:
623
serviceInterface = if_nametoindex(options.interface)
624
625
# From the Avahi server example code
626
server.connect_to_signal("StateChanged", server_state_changed)
627
server_state_changed(server.GetState())
628
# End of Avahi example code
629
630
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
631
lambda *args, **kwargs:
632
tcp_server.handle_request(*args[2:],
633
**kwargs) or True)
3648
634
try:
3649
if zeroconf:
3650
# From the Avahi example code
3651
try:
3652
service.activate()
3653
except dbus.exceptions.DBusException as error:
3654
logger.critical("D-Bus Exception", exc_info=error)
3655
cleanup()
3656
sys.exit(1)
3657
# End of Avahi example code
3658
3659
GLib.io_add_watch(
3660
GLib.IOChannel.unix_new(tcp_server.fileno()),
3661
GLib.PRIORITY_DEFAULT, GLib.IO_IN,
3662
lambda *args, **kwargs: (tcp_server.handle_request
3663
(*args[2:], **kwargs) or True))
3664
3665
logger.debug("Starting main loop")
3666
635
main_loop.run()
3667
except AvahiError as error:
3668
logger.critical("Avahi Error", exc_info=error)
3669
cleanup()
3670
sys.exit(1)
3671
636
except KeyboardInterrupt:
3672
if debug:
3673
print("", file=sys.stderr)
3674
logger.debug("Server received KeyboardInterrupt")
3675
logger.debug("Server exiting")
3676
# Must run before the D-Bus bus name gets deregistered
3677
cleanup()
3678
3679
3680
def should_only_run_tests():
3681
parser = argparse.ArgumentParser(add_help=False)
3682
parser.add_argument("--check", action="store_true")
3683
args, unknown_args = parser.parse_known_args()
3684
run_tests = args.check
3685
if run_tests:
3686
# Remove --check argument from sys.argv
3687
sys.argv[1:] = unknown_args
3688
return run_tests
3689
3690
# Add all tests from doctest strings
3691
def load_tests(loader, tests, none):
3692
import doctest
3693
tests.addTests(doctest.DocTestSuite())
3694
return tests
3695
3696
if __name__ == "__main__":
3697
try:
3698
if should_only_run_tests():
3699
# Call using ./mandos --check [--verbose]
3700
unittest.main()
3701
else:
3702
main()
3703
finally:
3704
logging.shutdown()
637
print
638
639
# Cleanup here
640
641
# From the Avahi server example code
642
if not group is None:
643
group.Free()
644
# End of Avahi example code
645
646
for client in clients:
647
client.stop_hook = None
648
client.stop()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0