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- Committer: Teddy Hogeborn
- Date: 2016-03-12 20:23:15 UTC
- Revision ID: teddy@recompile.se-20160312202315-hu7b87ivetlxqbw3
Server: Fix minor thing with Python 3 compatibility
Fix another small thing with unpickling string values.
* mandos (main): When restoring pickled client data, only decode byte
string for "host" key if it really is a byte string.
Fix another small thing with unpickling string values.
* mandos (main): When restoring pickled client data, only decode byte
string for "host" key if it really is a byte string.
- files added:
- DBUS-API
- debian/source
- debian/upstream
- network-hooks.d
- plugin-helpers
- files modified:
- .bzrignore
added
removed
mandos
6
6
# This program is partly derived from an example program for an Avahi
7
7
# service publisher, downloaded from
8
8
# <http://avahi.org/wiki/PythonPublishExample>. This includes the
9
# methods "add" and "remove" in the "AvahiService" class, the
10
# "server_state_changed" and "entry_group_state_changed" functions,
11
# and some lines in "main".
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
12
#
13
13
# Everything else is
14
# Copyright © 2008,2009 Teddy Hogeborn
15
# Copyright © 2008,2009 Björn Påhlsson
14
# Copyright © 2008-2016 Teddy Hogeborn
15
# Copyright © 2008-2016 Björn Påhlsson
16
16
#
17
17
# This program is free software: you can redistribute it and/or modify
18
18
# it under the terms of the GNU General Public License as published by
28
28
# along with this program. If not, see
29
29
# <http://www.gnu.org/licenses/>.
30
30
#
31
# Contact the authors at <mandos@fukt.bsnet.se>.
31
# Contact the authors at <mandos@recompile.se>.
32
32
#
33
33
34
from __future__ import division, with_statement, absolute_import
35
36
import SocketServer
34
from __future__ import (division, absolute_import, print_function,
35
unicode_literals)
36
37
try:
38
from future_builtins import *
39
except ImportError:
40
pass
41
42
try:
43
import SocketServer as socketserver
44
except ImportError:
45
import socketserver
37
46
import socket
38
import optparse
47
import argparse
39
48
import datetime
40
49
import errno
41
import gnutls.crypto
42
import gnutls.connection
43
import gnutls.errors
44
import gnutls.library.functions
45
import gnutls.library.constants
46
import gnutls.library.types
47
import ConfigParser
50
try:
51
import ConfigParser as configparser
52
except ImportError:
53
import configparser
48
54
import sys
49
55
import re
50
56
import os
51
57
import signal
52
from sets import Set
53
58
import subprocess
54
59
import atexit
55
60
import stat
56
61
import logging
57
62
import logging.handlers
58
63
import pwd
59
from contextlib import closing
64
import contextlib
65
import struct
66
import fcntl
67
import functools
68
try:
69
import cPickle as pickle
70
except ImportError:
71
import pickle
72
import multiprocessing
73
import types
74
import binascii
75
import tempfile
76
import itertools
77
import collections
78
import codecs
60
79
61
80
import dbus
62
81
import dbus.service
63
import gobject
64
import avahi
82
try:
83
from gi.repository import GObject
84
except ImportError:
85
import gobject as GObject
65
86
from dbus.mainloop.glib import DBusGMainLoop
66
87
import ctypes
67
88
import ctypes.util
68
69
version = "1.0.9"
70
71
logger = logging.Logger('mandos')
72
syslogger = (logging.handlers.SysLogHandler
73
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
74
address = "/dev/log"))
75
syslogger.setFormatter(logging.Formatter
76
('Mandos [%(process)d]: %(levelname)s:'
77
' %(message)s'))
78
logger.addHandler(syslogger)
79
80
console = logging.StreamHandler()
81
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
82
' %(levelname)s: %(message)s'))
83
logger.addHandler(console)
89
import xml.dom.minidom
90
import inspect
91
92
try:
93
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
94
except AttributeError:
95
try:
96
from IN import SO_BINDTODEVICE
97
except ImportError:
98
SO_BINDTODEVICE = None
99
100
if sys.version_info.major == 2:
101
str = unicode
102
103
version = "1.7.5"
104
stored_state_file = "clients.pickle"
105
106
logger = logging.getLogger()
107
syslogger = None
108
109
try:
110
if_nametoindex = ctypes.cdll.LoadLibrary(
111
ctypes.util.find_library("c")).if_nametoindex
112
except (OSError, AttributeError):
113
114
def if_nametoindex(interface):
115
"Get an interface index the hard way, i.e. using fcntl()"
116
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
117
with contextlib.closing(socket.socket()) as s:
118
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
119
struct.pack(b"16s16x", interface))
120
interface_index = struct.unpack("I", ifreq[16:20])[0]
121
return interface_index
122
123
124
def copy_function(func):
125
"""Make a copy of a function"""
126
if sys.version_info.major == 2:
127
return types.FunctionType(func.func_code,
128
func.func_globals,
129
func.func_name,
130
func.func_defaults,
131
func.func_closure)
132
else:
133
return types.FunctionType(func.__code__,
134
func.__globals__,
135
func.__name__,
136
func.__defaults__,
137
func.__closure__)
138
139
140
def initlogger(debug, level=logging.WARNING):
141
"""init logger and add loglevel"""
142
143
global syslogger
144
syslogger = (logging.handlers.SysLogHandler(
145
facility = logging.handlers.SysLogHandler.LOG_DAEMON,
146
address = "/dev/log"))
147
syslogger.setFormatter(logging.Formatter
148
('Mandos [%(process)d]: %(levelname)s:'
149
' %(message)s'))
150
logger.addHandler(syslogger)
151
152
if debug:
153
console = logging.StreamHandler()
154
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
155
' [%(process)d]:'
156
' %(levelname)s:'
157
' %(message)s'))
158
logger.addHandler(console)
159
logger.setLevel(level)
160
161
162
class PGPError(Exception):
163
"""Exception if encryption/decryption fails"""
164
pass
165
166
167
class PGPEngine(object):
168
"""A simple class for OpenPGP symmetric encryption & decryption"""
169
170
def __init__(self):
171
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
172
self.gpg = "gpg"
173
try:
174
output = subprocess.check_output(["gpgconf"])
175
for line in output.splitlines():
176
name, text, path = line.split(b":")
177
if name == "gpg":
178
self.gpg = path
179
break
180
except OSError as e:
181
if e.errno != errno.ENOENT:
182
raise
183
self.gnupgargs = ['--batch',
184
'--homedir', self.tempdir,
185
'--force-mdc',
186
'--quiet',
187
'--no-use-agent']
188
189
def __enter__(self):
190
return self
191
192
def __exit__(self, exc_type, exc_value, traceback):
193
self._cleanup()
194
return False
195
196
def __del__(self):
197
self._cleanup()
198
199
def _cleanup(self):
200
if self.tempdir is not None:
201
# Delete contents of tempdir
202
for root, dirs, files in os.walk(self.tempdir,
203
topdown = False):
204
for filename in files:
205
os.remove(os.path.join(root, filename))
206
for dirname in dirs:
207
os.rmdir(os.path.join(root, dirname))
208
# Remove tempdir
209
os.rmdir(self.tempdir)
210
self.tempdir = None
211
212
def password_encode(self, password):
213
# Passphrase can not be empty and can not contain newlines or
214
# NUL bytes. So we prefix it and hex encode it.
215
encoded = b"mandos" + binascii.hexlify(password)
216
if len(encoded) > 2048:
217
# GnuPG can't handle long passwords, so encode differently
218
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
219
.replace(b"\n", b"\\n")
220
.replace(b"\0", b"\\x00"))
221
return encoded
222
223
def encrypt(self, data, password):
224
passphrase = self.password_encode(password)
225
with tempfile.NamedTemporaryFile(
226
dir=self.tempdir) as passfile:
227
passfile.write(passphrase)
228
passfile.flush()
229
proc = subprocess.Popen([self.gpg, '--symmetric',
230
'--passphrase-file',
231
passfile.name]
232
+ self.gnupgargs,
233
stdin = subprocess.PIPE,
234
stdout = subprocess.PIPE,
235
stderr = subprocess.PIPE)
236
ciphertext, err = proc.communicate(input = data)
237
if proc.returncode != 0:
238
raise PGPError(err)
239
return ciphertext
240
241
def decrypt(self, data, password):
242
passphrase = self.password_encode(password)
243
with tempfile.NamedTemporaryFile(
244
dir = self.tempdir) as passfile:
245
passfile.write(passphrase)
246
passfile.flush()
247
proc = subprocess.Popen([self.gpg, '--decrypt',
248
'--passphrase-file',
249
passfile.name]
250
+ self.gnupgargs,
251
stdin = subprocess.PIPE,
252
stdout = subprocess.PIPE,
253
stderr = subprocess.PIPE)
254
decrypted_plaintext, err = proc.communicate(input = data)
255
if proc.returncode != 0:
256
raise PGPError(err)
257
return decrypted_plaintext
258
259
# Pretend that we have an Avahi module
260
class Avahi(object):
261
"""This isn't so much a class as it is a module-like namespace.
262
It is instantiated once, and simulates having an Avahi module."""
263
IF_UNSPEC = -1 # avahi-common/address.h
264
PROTO_UNSPEC = -1 # avahi-common/address.h
265
PROTO_INET = 0 # avahi-common/address.h
266
PROTO_INET6 = 1 # avahi-common/address.h
267
DBUS_NAME = "org.freedesktop.Avahi"
268
DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"
269
DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"
270
DBUS_PATH_SERVER = "/"
271
def string_array_to_txt_array(self, t):
272
return dbus.Array((dbus.ByteArray(s.encode("utf-8"))
273
for s in t), signature="ay")
274
ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h
275
ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h
276
ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h
277
SERVER_INVALID = 0 # avahi-common/defs.h
278
SERVER_REGISTERING = 1 # avahi-common/defs.h
279
SERVER_RUNNING = 2 # avahi-common/defs.h
280
SERVER_COLLISION = 3 # avahi-common/defs.h
281
SERVER_FAILURE = 4 # avahi-common/defs.h
282
avahi = Avahi()
84
283
85
284
class AvahiError(Exception):
86
285
def __init__(self, value, *args, **kwargs):
87
286
self.value = value
88
super(AvahiError, self).__init__(value, *args, **kwargs)
89
def __unicode__(self):
90
return unicode(repr(self.value))
287
return super(AvahiError, self).__init__(value, *args,
288
**kwargs)
289
91
290
92
291
class AvahiServiceError(AvahiError):
93
292
pass
94
293
294
95
295
class AvahiGroupError(AvahiError):
96
296
pass
97
297
98
298
99
299
class AvahiService(object):
100
300
"""An Avahi (Zeroconf) service.
301
101
302
Attributes:
102
303
interface: integer; avahi.IF_UNSPEC or an interface index.
103
304
Used to optionally bind to the specified interface.
104
305
name: string; Example: 'Mandos'
105
306
type: string; Example: '_mandos._tcp'.
106
See <http://www.dns-sd.org/ServiceTypes.html>
307
See <https://www.iana.org/assignments/service-names-port-numbers>
107
308
port: integer; what port to announce
108
309
TXT: list of strings; TXT record for the service
109
310
domain: string; Domain to publish on, default to .local if empty.
111
312
max_renames: integer; maximum number of renames
112
313
rename_count: integer; counter so we only rename after collisions
113
314
a sensible number of times
315
group: D-Bus Entry Group
316
server: D-Bus Server
317
bus: dbus.SystemBus()
114
318
"""
115
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
116
servicetype = None, port = None, TXT = None,
117
domain = "", host = "", max_renames = 32768,
118
protocol = avahi.PROTO_UNSPEC):
319
320
def __init__(self,
321
interface = avahi.IF_UNSPEC,
322
name = None,
323
servicetype = None,
324
port = None,
325
TXT = None,
326
domain = "",
327
host = "",
328
max_renames = 32768,
329
protocol = avahi.PROTO_UNSPEC,
330
bus = None):
119
331
self.interface = interface
120
332
self.name = name
121
333
self.type = servicetype
126
338
self.rename_count = 0
127
339
self.max_renames = max_renames
128
340
self.protocol = protocol
129
def rename(self):
341
self.group = None # our entry group
342
self.server = None
343
self.bus = bus
344
self.entry_group_state_changed_match = None
345
346
def rename(self, remove=True):
130
347
"""Derived from the Avahi example code"""
131
348
if self.rename_count >= self.max_renames:
132
logger.critical(u"No suitable Zeroconf service name found"
133
u" after %i retries, exiting.",
349
logger.critical("No suitable Zeroconf service name found"
350
" after %i retries, exiting.",
134
351
self.rename_count)
135
raise AvahiServiceError(u"Too many renames")
136
self.name = server.GetAlternativeServiceName(self.name)
137
logger.info(u"Changing Zeroconf service name to %r ...",
138
str(self.name))
139
syslogger.setFormatter(logging.Formatter
140
('Mandos (%s): %%(levelname)s:'
141
' %%(message)s' % self.name))
142
self.remove()
143
self.add()
352
raise AvahiServiceError("Too many renames")
353
self.name = str(
354
self.server.GetAlternativeServiceName(self.name))
144
355
self.rename_count += 1
356
logger.info("Changing Zeroconf service name to %r ...",
357
self.name)
358
if remove:
359
self.remove()
360
try:
361
self.add()
362
except dbus.exceptions.DBusException as error:
363
if (error.get_dbus_name()
364
== "org.freedesktop.Avahi.CollisionError"):
365
logger.info("Local Zeroconf service name collision.")
366
return self.rename(remove=False)
367
else:
368
logger.critical("D-Bus Exception", exc_info=error)
369
self.cleanup()
370
os._exit(1)
371
145
372
def remove(self):
146
373
"""Derived from the Avahi example code"""
147
if group is not None:
148
group.Reset()
374
if self.entry_group_state_changed_match is not None:
375
self.entry_group_state_changed_match.remove()
376
self.entry_group_state_changed_match = None
377
if self.group is not None:
378
self.group.Reset()
379
149
380
def add(self):
150
381
"""Derived from the Avahi example code"""
151
global group
152
if group is None:
153
group = dbus.Interface(bus.get_object
154
(avahi.DBUS_NAME,
155
server.EntryGroupNew()),
156
avahi.DBUS_INTERFACE_ENTRY_GROUP)
157
group.connect_to_signal('StateChanged',
158
entry_group_state_changed)
159
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
160
service.name, service.type)
161
group.AddService(
162
self.interface, # interface
163
self.protocol, # protocol
164
dbus.UInt32(0), # flags
165
self.name, self.type,
166
self.domain, self.host,
167
dbus.UInt16(self.port),
168
avahi.string_array_to_txt_array(self.TXT))
169
group.Commit()
170
171
# From the Avahi example code:
172
group = None # our entry group
173
# End of Avahi example code
174
175
176
def _datetime_to_dbus(dt, variant_level=0):
177
"""Convert a UTC datetime.datetime() to a D-Bus type."""
178
return dbus.String(dt.isoformat(), variant_level=variant_level)
179
180
181
class Client(dbus.service.Object):
382
self.remove()
383
if self.group is None:
384
self.group = dbus.Interface(
385
self.bus.get_object(avahi.DBUS_NAME,
386
self.server.EntryGroupNew()),
387
avahi.DBUS_INTERFACE_ENTRY_GROUP)
388
self.entry_group_state_changed_match = (
389
self.group.connect_to_signal(
390
'StateChanged', self.entry_group_state_changed))
391
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
392
self.name, self.type)
393
self.group.AddService(
394
self.interface,
395
self.protocol,
396
dbus.UInt32(0), # flags
397
self.name, self.type,
398
self.domain, self.host,
399
dbus.UInt16(self.port),
400
avahi.string_array_to_txt_array(self.TXT))
401
self.group.Commit()
402
403
def entry_group_state_changed(self, state, error):
404
"""Derived from the Avahi example code"""
405
logger.debug("Avahi entry group state change: %i", state)
406
407
if state == avahi.ENTRY_GROUP_ESTABLISHED:
408
logger.debug("Zeroconf service established.")
409
elif state == avahi.ENTRY_GROUP_COLLISION:
410
logger.info("Zeroconf service name collision.")
411
self.rename()
412
elif state == avahi.ENTRY_GROUP_FAILURE:
413
logger.critical("Avahi: Error in group state changed %s",
414
str(error))
415
raise AvahiGroupError("State changed: {!s}".format(error))
416
417
def cleanup(self):
418
"""Derived from the Avahi example code"""
419
if self.group is not None:
420
try:
421
self.group.Free()
422
except (dbus.exceptions.UnknownMethodException,
423
dbus.exceptions.DBusException):
424
pass
425
self.group = None
426
self.remove()
427
428
def server_state_changed(self, state, error=None):
429
"""Derived from the Avahi example code"""
430
logger.debug("Avahi server state change: %i", state)
431
bad_states = {
432
avahi.SERVER_INVALID: "Zeroconf server invalid",
433
avahi.SERVER_REGISTERING: None,
434
avahi.SERVER_COLLISION: "Zeroconf server name collision",
435
avahi.SERVER_FAILURE: "Zeroconf server failure",
436
}
437
if state in bad_states:
438
if bad_states[state] is not None:
439
if error is None:
440
logger.error(bad_states[state])
441
else:
442
logger.error(bad_states[state] + ": %r", error)
443
self.cleanup()
444
elif state == avahi.SERVER_RUNNING:
445
try:
446
self.add()
447
except dbus.exceptions.DBusException as error:
448
if (error.get_dbus_name()
449
== "org.freedesktop.Avahi.CollisionError"):
450
logger.info("Local Zeroconf service name"
451
" collision.")
452
return self.rename(remove=False)
453
else:
454
logger.critical("D-Bus Exception", exc_info=error)
455
self.cleanup()
456
os._exit(1)
457
else:
458
if error is None:
459
logger.debug("Unknown state: %r", state)
460
else:
461
logger.debug("Unknown state: %r: %r", state, error)
462
463
def activate(self):
464
"""Derived from the Avahi example code"""
465
if self.server is None:
466
self.server = dbus.Interface(
467
self.bus.get_object(avahi.DBUS_NAME,
468
avahi.DBUS_PATH_SERVER,
469
follow_name_owner_changes=True),
470
avahi.DBUS_INTERFACE_SERVER)
471
self.server.connect_to_signal("StateChanged",
472
self.server_state_changed)
473
self.server_state_changed(self.server.GetState())
474
475
476
class AvahiServiceToSyslog(AvahiService):
477
def rename(self, *args, **kwargs):
478
"""Add the new name to the syslog messages"""
479
ret = AvahiService.rename(self, *args, **kwargs)
480
syslogger.setFormatter(logging.Formatter(
481
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
482
.format(self.name)))
483
return ret
484
485
# Pretend that we have a GnuTLS module
486
class GnuTLS(object):
487
"""This isn't so much a class as it is a module-like namespace.
488
It is instantiated once, and simulates having a GnuTLS module."""
489
490
_library = ctypes.cdll.LoadLibrary(
491
ctypes.util.find_library("gnutls"))
492
_need_version = b"3.3.0"
493
def __init__(self):
494
# Need to use class name "GnuTLS" here, since this method is
495
# called before the assignment to the "gnutls" global variable
496
# happens.
497
if GnuTLS.check_version(self._need_version) is None:
498
raise GnuTLS.Error("Needs GnuTLS {} or later"
499
.format(self._need_version))
500
501
# Unless otherwise indicated, the constants and types below are
502
# all from the gnutls/gnutls.h C header file.
503
504
# Constants
505
E_SUCCESS = 0
506
E_INTERRUPTED = -52
507
E_AGAIN = -28
508
CRT_OPENPGP = 2
509
CLIENT = 2
510
SHUT_RDWR = 0
511
CRD_CERTIFICATE = 1
512
E_NO_CERTIFICATE_FOUND = -49
513
OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
514
515
# Types
516
class session_int(ctypes.Structure):
517
_fields_ = []
518
session_t = ctypes.POINTER(session_int)
519
class certificate_credentials_st(ctypes.Structure):
520
_fields_ = []
521
certificate_credentials_t = ctypes.POINTER(
522
certificate_credentials_st)
523
certificate_type_t = ctypes.c_int
524
class datum_t(ctypes.Structure):
525
_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
526
('size', ctypes.c_uint)]
527
class openpgp_crt_int(ctypes.Structure):
528
_fields_ = []
529
openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
530
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
531
log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
532
credentials_type_t = ctypes.c_int
533
transport_ptr_t = ctypes.c_void_p
534
close_request_t = ctypes.c_int
535
536
# Exceptions
537
class Error(Exception):
538
# We need to use the class name "GnuTLS" here, since this
539
# exception might be raised from within GnuTLS.__init__,
540
# which is called before the assignment to the "gnutls"
541
# global variable has happened.
542
def __init__(self, message = None, code = None, args=()):
543
# Default usage is by a message string, but if a return
544
# code is passed, convert it to a string with
545
# gnutls.strerror()
546
self.code = code
547
if message is None and code is not None:
548
message = GnuTLS.strerror(code)
549
return super(GnuTLS.Error, self).__init__(
550
message, *args)
551
552
class CertificateSecurityError(Error):
553
pass
554
555
# Classes
556
class Credentials(object):
557
def __init__(self):
558
self._c_object = gnutls.certificate_credentials_t()
559
gnutls.certificate_allocate_credentials(
560
ctypes.byref(self._c_object))
561
self.type = gnutls.CRD_CERTIFICATE
562
563
def __del__(self):
564
gnutls.certificate_free_credentials(self._c_object)
565
566
class ClientSession(object):
567
def __init__(self, socket, credentials = None):
568
self._c_object = gnutls.session_t()
569
gnutls.init(ctypes.byref(self._c_object), gnutls.CLIENT)
570
gnutls.set_default_priority(self._c_object)
571
gnutls.transport_set_ptr(self._c_object, socket.fileno())
572
gnutls.handshake_set_private_extensions(self._c_object,
573
True)
574
self.socket = socket
575
if credentials is None:
576
credentials = gnutls.Credentials()
577
gnutls.credentials_set(self._c_object, credentials.type,
578
ctypes.cast(credentials._c_object,
579
ctypes.c_void_p))
580
self.credentials = credentials
581
582
def __del__(self):
583
gnutls.deinit(self._c_object)
584
585
def handshake(self):
586
return gnutls.handshake(self._c_object)
587
588
def send(self, data):
589
data = bytes(data)
590
data_len = len(data)
591
while data_len > 0:
592
data_len -= gnutls.record_send(self._c_object,
593
data[-data_len:],
594
data_len)
595
596
def bye(self):
597
return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
598
599
# Error handling functions
600
def _error_code(result):
601
"""A function to raise exceptions on errors, suitable
602
for the 'restype' attribute on ctypes functions"""
603
if result >= 0:
604
return result
605
if result == gnutls.E_NO_CERTIFICATE_FOUND:
606
raise gnutls.CertificateSecurityError(code = result)
607
raise gnutls.Error(code = result)
608
609
def _retry_on_error(result, func, arguments):
610
"""A function to retry on some errors, suitable
611
for the 'errcheck' attribute on ctypes functions"""
612
while result < 0:
613
if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
614
return _error_code(result)
615
result = func(*arguments)
616
return result
617
618
# Unless otherwise indicated, the function declarations below are
619
# all from the gnutls/gnutls.h C header file.
620
621
# Functions
622
priority_set_direct = _library.gnutls_priority_set_direct
623
priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
624
ctypes.POINTER(ctypes.c_char_p)]
625
priority_set_direct.restype = _error_code
626
627
init = _library.gnutls_init
628
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
629
init.restype = _error_code
630
631
set_default_priority = _library.gnutls_set_default_priority
632
set_default_priority.argtypes = [session_t]
633
set_default_priority.restype = _error_code
634
635
record_send = _library.gnutls_record_send
636
record_send.argtypes = [session_t, ctypes.c_void_p,
637
ctypes.c_size_t]
638
record_send.restype = ctypes.c_ssize_t
639
record_send.errcheck = _retry_on_error
640
641
certificate_allocate_credentials = (
642
_library.gnutls_certificate_allocate_credentials)
643
certificate_allocate_credentials.argtypes = [
644
ctypes.POINTER(certificate_credentials_t)]
645
certificate_allocate_credentials.restype = _error_code
646
647
certificate_free_credentials = (
648
_library.gnutls_certificate_free_credentials)
649
certificate_free_credentials.argtypes = [certificate_credentials_t]
650
certificate_free_credentials.restype = None
651
652
handshake_set_private_extensions = (
653
_library.gnutls_handshake_set_private_extensions)
654
handshake_set_private_extensions.argtypes = [session_t,
655
ctypes.c_int]
656
handshake_set_private_extensions.restype = None
657
658
credentials_set = _library.gnutls_credentials_set
659
credentials_set.argtypes = [session_t, credentials_type_t,
660
ctypes.c_void_p]
661
credentials_set.restype = _error_code
662
663
strerror = _library.gnutls_strerror
664
strerror.argtypes = [ctypes.c_int]
665
strerror.restype = ctypes.c_char_p
666
667
certificate_type_get = _library.gnutls_certificate_type_get
668
certificate_type_get.argtypes = [session_t]
669
certificate_type_get.restype = _error_code
670
671
certificate_get_peers = _library.gnutls_certificate_get_peers
672
certificate_get_peers.argtypes = [session_t,
673
ctypes.POINTER(ctypes.c_uint)]
674
certificate_get_peers.restype = ctypes.POINTER(datum_t)
675
676
global_set_log_level = _library.gnutls_global_set_log_level
677
global_set_log_level.argtypes = [ctypes.c_int]
678
global_set_log_level.restype = None
679
680
global_set_log_function = _library.gnutls_global_set_log_function
681
global_set_log_function.argtypes = [log_func]
682
global_set_log_function.restype = None
683
684
deinit = _library.gnutls_deinit
685
deinit.argtypes = [session_t]
686
deinit.restype = None
687
688
handshake = _library.gnutls_handshake
689
handshake.argtypes = [session_t]
690
handshake.restype = _error_code
691
handshake.errcheck = _retry_on_error
692
693
transport_set_ptr = _library.gnutls_transport_set_ptr
694
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
695
transport_set_ptr.restype = None
696
697
bye = _library.gnutls_bye
698
bye.argtypes = [session_t, close_request_t]
699
bye.restype = _error_code
700
bye.errcheck = _retry_on_error
701
702
check_version = _library.gnutls_check_version
703
check_version.argtypes = [ctypes.c_char_p]
704
check_version.restype = ctypes.c_char_p
705
706
# All the function declarations below are from gnutls/openpgp.h
707
708
openpgp_crt_init = _library.gnutls_openpgp_crt_init
709
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
710
openpgp_crt_init.restype = _error_code
711
712
openpgp_crt_import = _library.gnutls_openpgp_crt_import
713
openpgp_crt_import.argtypes = [openpgp_crt_t,
714
ctypes.POINTER(datum_t),
715
openpgp_crt_fmt_t]
716
openpgp_crt_import.restype = _error_code
717
718
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
719
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
720
ctypes.POINTER(ctypes.c_uint)]
721
openpgp_crt_verify_self.restype = _error_code
722
723
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
724
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
725
openpgp_crt_deinit.restype = None
726
727
openpgp_crt_get_fingerprint = (
728
_library.gnutls_openpgp_crt_get_fingerprint)
729
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
730
ctypes.c_void_p,
731
ctypes.POINTER(
732
ctypes.c_size_t)]
733
openpgp_crt_get_fingerprint.restype = _error_code
734
735
# Remove non-public functions
736
del _error_code, _retry_on_error
737
# Create the global "gnutls" object, simulating a module
738
gnutls = GnuTLS()
739
740
def call_pipe(connection, # : multiprocessing.Connection
741
func, *args, **kwargs):
742
"""This function is meant to be called by multiprocessing.Process
743
744
This function runs func(*args, **kwargs), and writes the resulting
745
return value on the provided multiprocessing.Connection.
746
"""
747
connection.send(func(*args, **kwargs))
748
connection.close()
749
750
class Client(object):
182
751
"""A representation of a client host served by this server.
752
183
753
Attributes:
184
name: string; from the config file, used in log messages and
185
D-Bus identifiers
186
fingerprint: string (40 or 32 hexadecimal digits); used to
187
uniquely identify the client
188
secret: bytestring; sent verbatim (over TLS) to client
189
host: string; available for use by the checker command
190
created: datetime.datetime(); (UTC) object creation
191
last_enabled: datetime.datetime(); (UTC)
192
enabled: bool()
193
last_checked_ok: datetime.datetime(); (UTC) or None
194
timeout: datetime.timedelta(); How long from last_checked_ok
195
until this client is invalid
196
interval: datetime.timedelta(); How often to start a new checker
197
disable_hook: If set, called by disable() as disable_hook(self)
754
approved: bool(); 'None' if not yet approved/disapproved
755
approval_delay: datetime.timedelta(); Time to wait for approval
756
approval_duration: datetime.timedelta(); Duration of one approval
198
757
checker: subprocess.Popen(); a running checker process used
199
758
to see if the client lives.
200
759
'None' if no process is running.
201
checker_initiator_tag: a gobject event source tag, or None
202
disable_initiator_tag: - '' -
203
checker_callback_tag: - '' -
204
checker_command: string; External command which is run to check if
205
client lives. %() expansions are done at
760
checker_callback_tag: a GObject event source tag, or None
761
checker_command: string; External command which is run to check
762
if client lives. %() expansions are done at
206
763
runtime with vars(self) as dict, so that for
207
764
instance %(name)s can be used in the command.
765
checker_initiator_tag: a GObject event source tag, or None
766
created: datetime.datetime(); (UTC) object creation
767
client_structure: Object describing what attributes a client has
768
and is used for storing the client at exit
208
769
current_checker_command: string; current running checker_command
209
use_dbus: bool(); Whether to provide D-Bus interface and signals
210
dbus_object_path: dbus.ObjectPath ; only set if self.use_dbus
770
disable_initiator_tag: a GObject event source tag, or None
771
enabled: bool()
772
fingerprint: string (40 or 32 hexadecimal digits); used to
773
uniquely identify the client
774
host: string; available for use by the checker command
775
interval: datetime.timedelta(); How often to start a new checker
776
last_approval_request: datetime.datetime(); (UTC) or None
777
last_checked_ok: datetime.datetime(); (UTC) or None
778
last_checker_status: integer between 0 and 255 reflecting exit
779
status of last checker. -1 reflects crashed
780
checker, -2 means no checker completed yet.
781
last_checker_signal: The signal which killed the last checker, if
782
last_checker_status is -1
783
last_enabled: datetime.datetime(); (UTC) or None
784
name: string; from the config file, used in log messages and
785
D-Bus identifiers
786
secret: bytestring; sent verbatim (over TLS) to client
787
timeout: datetime.timedelta(); How long from last_checked_ok
788
until this client is disabled
789
extended_timeout: extra long timeout when secret has been sent
790
runtime_expansions: Allowed attributes for runtime expansion.
791
expires: datetime.datetime(); time (UTC) when a client will be
792
disabled, or None
793
server_settings: The server_settings dict from main()
211
794
"""
212
def timeout_milliseconds(self):
213
"Return the 'timeout' attribute in milliseconds"
214
return ((self.timeout.days * 24 * 60 * 60 * 1000)
215
+ (self.timeout.seconds * 1000)
216
+ (self.timeout.microseconds // 1000))
217
218
def interval_milliseconds(self):
219
"Return the 'interval' attribute in milliseconds"
220
return ((self.interval.days * 24 * 60 * 60 * 1000)
221
+ (self.interval.seconds * 1000)
222
+ (self.interval.microseconds // 1000))
223
224
def __init__(self, name = None, disable_hook=None, config=None,
225
use_dbus=True):
226
"""Note: the 'checker' key in 'config' sets the
227
'checker_command' attribute and *not* the 'checker'
228
attribute."""
795
796
runtime_expansions = ("approval_delay", "approval_duration",
797
"created", "enabled", "expires",
798
"fingerprint", "host", "interval",
799
"last_approval_request", "last_checked_ok",
800
"last_enabled", "name", "timeout")
801
client_defaults = {
802
"timeout": "PT5M",
803
"extended_timeout": "PT15M",
804
"interval": "PT2M",
805
"checker": "fping -q -- %%(host)s",
806
"host": "",
807
"approval_delay": "PT0S",
808
"approval_duration": "PT1S",
809
"approved_by_default": "True",
810
"enabled": "True",
811
}
812
813
@staticmethod
814
def config_parser(config):
815
"""Construct a new dict of client settings of this form:
816
{ client_name: {setting_name: value, ...}, ...}
817
with exceptions for any special settings as defined above.
818
NOTE: Must be a pure function. Must return the same result
819
value given the same arguments.
820
"""
821
settings = {}
822
for client_name in config.sections():
823
section = dict(config.items(client_name))
824
client = settings[client_name] = {}
825
826
client["host"] = section["host"]
827
# Reformat values from string types to Python types
828
client["approved_by_default"] = config.getboolean(
829
client_name, "approved_by_default")
830
client["enabled"] = config.getboolean(client_name,
831
"enabled")
832
833
# Uppercase and remove spaces from fingerprint for later
834
# comparison purposes with return value from the
835
# fingerprint() function
836
client["fingerprint"] = (section["fingerprint"].upper()
837
.replace(" ", ""))
838
if "secret" in section:
839
client["secret"] = codecs.decode(section["secret"]
840
.encode("utf-8"),
841
"base64")
842
elif "secfile" in section:
843
with open(os.path.expanduser(os.path.expandvars
844
(section["secfile"])),
845
"rb") as secfile:
846
client["secret"] = secfile.read()
847
else:
848
raise TypeError("No secret or secfile for section {}"
849
.format(section))
850
client["timeout"] = string_to_delta(section["timeout"])
851
client["extended_timeout"] = string_to_delta(
852
section["extended_timeout"])
853
client["interval"] = string_to_delta(section["interval"])
854
client["approval_delay"] = string_to_delta(
855
section["approval_delay"])
856
client["approval_duration"] = string_to_delta(
857
section["approval_duration"])
858
client["checker_command"] = section["checker"]
859
client["last_approval_request"] = None
860
client["last_checked_ok"] = None
861
client["last_checker_status"] = -2
862
863
return settings
864
865
def __init__(self, settings, name = None, server_settings=None):
229
866
self.name = name
230
if config is None:
231
config = {}
232
logger.debug(u"Creating client %r", self.name)
233
self.use_dbus = False # During __init__
234
# Uppercase and remove spaces from fingerprint for later
235
# comparison purposes with return value from the fingerprint()
236
# function
237
self.fingerprint = (config["fingerprint"].upper()
238
.replace(u" ", u""))
239
logger.debug(u" Fingerprint: %s", self.fingerprint)
240
if "secret" in config:
241
self.secret = config["secret"].decode(u"base64")
242
elif "secfile" in config:
243
with closing(open(os.path.expanduser
244
(os.path.expandvars
245
(config["secfile"])))) as secfile:
246
self.secret = secfile.read()
867
if server_settings is None:
868
server_settings = {}
869
self.server_settings = server_settings
870
# adding all client settings
871
for setting, value in settings.items():
872
setattr(self, setting, value)
873
874
if self.enabled:
875
if not hasattr(self, "last_enabled"):
876
self.last_enabled = datetime.datetime.utcnow()
877
if not hasattr(self, "expires"):
878
self.expires = (datetime.datetime.utcnow()
879
+ self.timeout)
247
880
else:
248
raise TypeError(u"No secret or secfile for client %s"
249
% self.name)
250
self.host = config.get("host", "")
251
self.created = datetime.datetime.utcnow()
252
self.enabled = False
253
self.last_enabled = None
254
self.last_checked_ok = None
255
self.timeout = string_to_delta(config["timeout"])
256
self.interval = string_to_delta(config["interval"])
257
self.disable_hook = disable_hook
881
self.last_enabled = None
882
self.expires = None
883
884
logger.debug("Creating client %r", self.name)
885
logger.debug(" Fingerprint: %s", self.fingerprint)
886
self.created = settings.get("created",
887
datetime.datetime.utcnow())
888
889
# attributes specific for this server instance
258
890
self.checker = None
259
891
self.checker_initiator_tag = None
260
892
self.disable_initiator_tag = None
261
893
self.checker_callback_tag = None
262
self.checker_command = config["checker"]
263
894
self.current_checker_command = None
264
self.last_connect = None
265
# Only now, when this client is initialized, can it show up on
266
# the D-Bus
267
self.use_dbus = use_dbus
268
if self.use_dbus:
269
self.dbus_object_path = (dbus.ObjectPath
270
("/clients/"
271
+ self.name.replace(".", "_")))
272
dbus.service.Object.__init__(self, bus,
273
self.dbus_object_path)
895
self.approved = None
896
self.approvals_pending = 0
897
self.changedstate = multiprocessing_manager.Condition(
898
multiprocessing_manager.Lock())
899
self.client_structure = [attr
900
for attr in self.__dict__.keys()
901
if not attr.startswith("_")]
902
self.client_structure.append("client_structure")
903
904
for name, t in inspect.getmembers(
905
type(self), lambda obj: isinstance(obj, property)):
906
if not name.startswith("_"):
907
self.client_structure.append(name)
908
909
# Send notice to process children that client state has changed
910
def send_changedstate(self):
911
with self.changedstate:
912
self.changedstate.notify_all()
274
913
275
914
def enable(self):
276
915
"""Start this client's checker and timeout hooks"""
916
if getattr(self, "enabled", False):
917
# Already enabled
918
return
919
self.expires = datetime.datetime.utcnow() + self.timeout
920
self.enabled = True
277
921
self.last_enabled = datetime.datetime.utcnow()
922
self.init_checker()
923
self.send_changedstate()
924
925
def disable(self, quiet=True):
926
"""Disable this client."""
927
if not getattr(self, "enabled", False):
928
return False
929
if not quiet:
930
logger.info("Disabling client %s", self.name)
931
if getattr(self, "disable_initiator_tag", None) is not None:
932
GObject.source_remove(self.disable_initiator_tag)
933
self.disable_initiator_tag = None
934
self.expires = None
935
if getattr(self, "checker_initiator_tag", None) is not None:
936
GObject.source_remove(self.checker_initiator_tag)
937
self.checker_initiator_tag = None
938
self.stop_checker()
939
self.enabled = False
940
if not quiet:
941
self.send_changedstate()
942
# Do not run this again if called by a GObject.timeout_add
943
return False
944
945
def __del__(self):
946
self.disable()
947
948
def init_checker(self):
278
949
# Schedule a new checker to be started an 'interval' from now,
279
950
# and every interval from then on.
280
self.checker_initiator_tag = (gobject.timeout_add
281
(self.interval_milliseconds(),
282
self.start_checker))
951
if self.checker_initiator_tag is not None:
952
GObject.source_remove(self.checker_initiator_tag)
953
self.checker_initiator_tag = GObject.timeout_add(
954
int(self.interval.total_seconds() * 1000),
955
self.start_checker)
956
# Schedule a disable() when 'timeout' has passed
957
if self.disable_initiator_tag is not None:
958
GObject.source_remove(self.disable_initiator_tag)
959
self.disable_initiator_tag = GObject.timeout_add(
960
int(self.timeout.total_seconds() * 1000), self.disable)
283
961
# Also start a new checker *right now*.
284
962
self.start_checker()
285
# Schedule a disable() when 'timeout' has passed
286
self.disable_initiator_tag = (gobject.timeout_add
287
(self.timeout_milliseconds(),
288
self.disable))
289
self.enabled = True
290
if self.use_dbus:
291
# Emit D-Bus signals
292
self.PropertyChanged(dbus.String(u"enabled"),
293
dbus.Boolean(True, variant_level=1))
294
self.PropertyChanged(dbus.String(u"last_enabled"),
295
(_datetime_to_dbus(self.last_enabled,
296
variant_level=1)))
297
298
def disable(self):
299
"""Disable this client."""
300
if not getattr(self, "enabled", False):
301
return False
302
logger.info(u"Disabling client %s", self.name)
303
if getattr(self, "disable_initiator_tag", False):
304
gobject.source_remove(self.disable_initiator_tag)
305
self.disable_initiator_tag = None
306
if getattr(self, "checker_initiator_tag", False):
307
gobject.source_remove(self.checker_initiator_tag)
308
self.checker_initiator_tag = None
309
self.stop_checker()
310
if self.disable_hook:
311
self.disable_hook(self)
312
self.enabled = False
313
if self.use_dbus:
314
# Emit D-Bus signal
315
self.PropertyChanged(dbus.String(u"enabled"),
316
dbus.Boolean(False, variant_level=1))
317
# Do not run this again if called by a gobject.timeout_add
318
return False
319
320
def __del__(self):
321
self.disable_hook = None
322
self.disable()
323
324
def checker_callback(self, pid, condition, command):
963
964
def checker_callback(self, source, condition, connection,
965
command):
325
966
"""The checker has completed, so take appropriate actions."""
326
967
self.checker_callback_tag = None
327
968
self.checker = None
328
if self.use_dbus:
329
# Emit D-Bus signal
330
self.PropertyChanged(dbus.String(u"checker_running"),
331
dbus.Boolean(False, variant_level=1))
332
if os.WIFEXITED(condition):
333
exitstatus = os.WEXITSTATUS(condition)
334
if exitstatus == 0:
335
logger.info(u"Checker for %(name)s succeeded",
969
# Read return code from connection (see call_pipe)
970
returncode = connection.recv()
971
connection.close()
972
973
if returncode >= 0:
974
self.last_checker_status = returncode
975
self.last_checker_signal = None
976
if self.last_checker_status == 0:
977
logger.info("Checker for %(name)s succeeded",
336
978
vars(self))
337
979
self.checked_ok()
338
980
else:
339
logger.info(u"Checker for %(name)s failed",
340
vars(self))
341
if self.use_dbus:
342
# Emit D-Bus signal
343
self.CheckerCompleted(dbus.Int16(exitstatus),
344
dbus.Int64(condition),
345
dbus.String(command))
981
logger.info("Checker for %(name)s failed", vars(self))
346
982
else:
347
logger.warning(u"Checker for %(name)s crashed?",
983
self.last_checker_status = -1
984
self.last_checker_signal = -returncode
985
logger.warning("Checker for %(name)s crashed?",
348
986
vars(self))
349
if self.use_dbus:
350
# Emit D-Bus signal
351
self.CheckerCompleted(dbus.Int16(-1),
352
dbus.Int64(condition),
353
dbus.String(command))
987
return False
354
988
355
989
def checked_ok(self):
356
"""Bump up the timeout for this client.
357
This should only be called when the client has been seen,
358
alive and well.
359
"""
990
"""Assert that the client has been seen, alive and well."""
360
991
self.last_checked_ok = datetime.datetime.utcnow()
361
gobject.source_remove(self.disable_initiator_tag)
362
self.disable_initiator_tag = (gobject.timeout_add
363
(self.timeout_milliseconds(),
364
self.disable))
365
if self.use_dbus:
366
# Emit D-Bus signal
367
self.PropertyChanged(
368
dbus.String(u"last_checked_ok"),
369
(_datetime_to_dbus(self.last_checked_ok,
370
variant_level=1)))
992
self.last_checker_status = 0
993
self.last_checker_signal = None
994
self.bump_timeout()
995
996
def bump_timeout(self, timeout=None):
997
"""Bump up the timeout for this client."""
998
if timeout is None:
999
timeout = self.timeout
1000
if self.disable_initiator_tag is not None:
1001
GObject.source_remove(self.disable_initiator_tag)
1002
self.disable_initiator_tag = None
1003
if getattr(self, "enabled", False):
1004
self.disable_initiator_tag = GObject.timeout_add(
1005
int(timeout.total_seconds() * 1000), self.disable)
1006
self.expires = datetime.datetime.utcnow() + timeout
1007
1008
def need_approval(self):
1009
self.last_approval_request = datetime.datetime.utcnow()
371
1010
372
1011
def start_checker(self):
373
1012
"""Start a new checker subprocess if one is not running.
1013
374
1014
If a checker already exists, leave it running and do
375
1015
nothing."""
376
1016
# The reason for not killing a running checker is that if we
377
# did that, then if a checker (for some reason) started
378
# running slowly and taking more than 'interval' time, the
379
# client would inevitably timeout, since no checker would get
380
# a chance to run to completion. If we instead leave running
1017
# did that, and if a checker (for some reason) started running
1018
# slowly and taking more than 'interval' time, then the client
1019
# would inevitably timeout, since no checker would get a
1020
# chance to run to completion. If we instead leave running
381
1021
# checkers alone, the checker would have to take more time
382
# than 'timeout' for the client to be declared invalid, which
383
# is as it should be.
1022
# than 'timeout' for the client to be disabled, which is as it
1023
# should be.
384
1024
385
# If a checker exists, make sure it is not a zombie
386
if self.checker is not None:
387
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
388
if pid:
389
logger.warning("Checker was a zombie")
390
gobject.source_remove(self.checker_callback_tag)
391
self.checker_callback(pid, status,
392
self.current_checker_command)
1025
if self.checker is not None and not self.checker.is_alive():
1026
logger.warning("Checker was not alive; joining")
1027
self.checker.join()
1028
self.checker = None
393
1029
# Start a new checker if needed
394
1030
if self.checker is None:
395
try:
396
# In case checker_command has exactly one % operator
397
command = self.checker_command % self.host
398
except TypeError:
399
# Escape attributes for the shell
400
escaped_attrs = dict((key, re.escape(str(val)))
401
for key, val in
402
vars(self).iteritems())
403
try:
404
command = self.checker_command % escaped_attrs
405
except TypeError, error:
406
logger.error(u'Could not format string "%s":'
407
u' %s', self.checker_command, error)
408
return True # Try again later
409
self.current_checker_command = command
410
try:
411
logger.info(u"Starting checker %r for %s",
412
command, self.name)
413
# We don't need to redirect stdout and stderr, since
414
# in normal mode, that is already done by daemon(),
415
# and in debug mode we don't want to. (Stdin is
416
# always replaced by /dev/null.)
417
self.checker = subprocess.Popen(command,
418
close_fds=True,
419
shell=True, cwd="/")
420
if self.use_dbus:
421
# Emit D-Bus signal
422
self.CheckerStarted(command)
423
self.PropertyChanged(
424
dbus.String("checker_running"),
425
dbus.Boolean(True, variant_level=1))
426
self.checker_callback_tag = (gobject.child_watch_add
427
(self.checker.pid,
428
self.checker_callback,
429
data=command))
430
# The checker may have completed before the gobject
431
# watch was added. Check for this.
432
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
433
if pid:
434
gobject.source_remove(self.checker_callback_tag)
435
self.checker_callback(pid, status, command)
436
except OSError, error:
437
logger.error(u"Failed to start subprocess: %s",
438
error)
439
# Re-run this periodically if run by gobject.timeout_add
1031
# Escape attributes for the shell
1032
escaped_attrs = {
1033
attr: re.escape(str(getattr(self, attr)))
1034
for attr in self.runtime_expansions }
1035
try:
1036
command = self.checker_command % escaped_attrs
1037
except TypeError as error:
1038
logger.error('Could not format string "%s"',
1039
self.checker_command,
1040
exc_info=error)
1041
return True # Try again later
1042
self.current_checker_command = command
1043
logger.info("Starting checker %r for %s", command,
1044
self.name)
1045
# We don't need to redirect stdout and stderr, since
1046
# in normal mode, that is already done by daemon(),
1047
# and in debug mode we don't want to. (Stdin is
1048
# always replaced by /dev/null.)
1049
# The exception is when not debugging but nevertheless
1050
# running in the foreground; use the previously
1051
# created wnull.
1052
popen_args = { "close_fds": True,
1053
"shell": True,
1054
"cwd": "/" }
1055
if (not self.server_settings["debug"]
1056
and self.server_settings["foreground"]):
1057
popen_args.update({"stdout": wnull,
1058
"stderr": wnull })
1059
pipe = multiprocessing.Pipe(duplex = False)
1060
self.checker = multiprocessing.Process(
1061
target = call_pipe,
1062
args = (pipe[1], subprocess.call, command),
1063
kwargs = popen_args)
1064
self.checker.start()
1065
self.checker_callback_tag = GObject.io_add_watch(
1066
pipe[0].fileno(), GObject.IO_IN,
1067
self.checker_callback, pipe[0], command)
1068
# Re-run this periodically if run by GObject.timeout_add
440
1069
return True
441
1070
442
1071
def stop_checker(self):
443
1072
"""Force the checker process, if any, to stop."""
444
1073
if self.checker_callback_tag:
445
gobject.source_remove(self.checker_callback_tag)
1074
GObject.source_remove(self.checker_callback_tag)
446
1075
self.checker_callback_tag = None
447
1076
if getattr(self, "checker", None) is None:
448
1077
return
449
logger.debug(u"Stopping checker for %(name)s", vars(self))
450
try:
451
os.kill(self.checker.pid, signal.SIGTERM)
452
#os.sleep(0.5)
453
#if self.checker.poll() is None:
454
# os.kill(self.checker.pid, signal.SIGKILL)
455
except OSError, error:
456
if error.errno != errno.ESRCH: # No such process
457
raise
1078
logger.debug("Stopping checker for %(name)s", vars(self))
1079
self.checker.terminate()
458
1080
self.checker = None
459
if self.use_dbus:
460
self.PropertyChanged(dbus.String(u"checker_running"),
461
dbus.Boolean(False, variant_level=1))
462
463
def still_valid(self):
464
"""Has the timeout not yet passed for this client?"""
465
if not getattr(self, "enabled", False):
466
return False
467
now = datetime.datetime.utcnow()
468
if self.last_checked_ok is None:
469
return now < (self.created + self.timeout)
1081
1082
1083
def dbus_service_property(dbus_interface,
1084
signature="v",
1085
access="readwrite",
1086
byte_arrays=False):
1087
"""Decorators for marking methods of a DBusObjectWithProperties to
1088
become properties on the D-Bus.
1089
1090
The decorated method will be called with no arguments by "Get"
1091
and with one argument by "Set".
1092
1093
The parameters, where they are supported, are the same as
1094
dbus.service.method, except there is only "signature", since the
1095
type from Get() and the type sent to Set() is the same.
1096
"""
1097
# Encoding deeply encoded byte arrays is not supported yet by the
1098
# "Set" method, so we fail early here:
1099
if byte_arrays and signature != "ay":
1100
raise ValueError("Byte arrays not supported for non-'ay'"
1101
" signature {!r}".format(signature))
1102
1103
def decorator(func):
1104
func._dbus_is_property = True
1105
func._dbus_interface = dbus_interface
1106
func._dbus_signature = signature
1107
func._dbus_access = access
1108
func._dbus_name = func.__name__
1109
if func._dbus_name.endswith("_dbus_property"):
1110
func._dbus_name = func._dbus_name[:-14]
1111
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
1112
return func
1113
1114
return decorator
1115
1116
1117
def dbus_interface_annotations(dbus_interface):
1118
"""Decorator for marking functions returning interface annotations
1119
1120
Usage:
1121
1122
@dbus_interface_annotations("org.example.Interface")
1123
def _foo(self): # Function name does not matter
1124
return {"org.freedesktop.DBus.Deprecated": "true",
1125
"org.freedesktop.DBus.Property.EmitsChangedSignal":
1126
"false"}
1127
"""
1128
1129
def decorator(func):
1130
func._dbus_is_interface = True
1131
func._dbus_interface = dbus_interface
1132
func._dbus_name = dbus_interface
1133
return func
1134
1135
return decorator
1136
1137
1138
def dbus_annotations(annotations):
1139
"""Decorator to annotate D-Bus methods, signals or properties
1140
Usage:
1141
1142
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
1143
"org.freedesktop.DBus.Property."
1144
"EmitsChangedSignal": "false"})
1145
@dbus_service_property("org.example.Interface", signature="b",
1146
access="r")
1147
def Property_dbus_property(self):
1148
return dbus.Boolean(False)
1149
1150
See also the DBusObjectWithAnnotations class.
1151
"""
1152
1153
def decorator(func):
1154
func._dbus_annotations = annotations
1155
return func
1156
1157
return decorator
1158
1159
1160
class DBusPropertyException(dbus.exceptions.DBusException):
1161
"""A base class for D-Bus property-related exceptions
1162
"""
1163
pass
1164
1165
1166
class DBusPropertyAccessException(DBusPropertyException):
1167
"""A property's access permissions disallows an operation.
1168
"""
1169
pass
1170
1171
1172
class DBusPropertyNotFound(DBusPropertyException):
1173
"""An attempt was made to access a non-existing property.
1174
"""
1175
pass
1176
1177
1178
class DBusObjectWithAnnotations(dbus.service.Object):
1179
"""A D-Bus object with annotations.
1180
1181
Classes inheriting from this can use the dbus_annotations
1182
decorator to add annotations to methods or signals.
1183
"""
1184
1185
@staticmethod
1186
def _is_dbus_thing(thing):
1187
"""Returns a function testing if an attribute is a D-Bus thing
1188
1189
If called like _is_dbus_thing("method") it returns a function
1190
suitable for use as predicate to inspect.getmembers().
1191
"""
1192
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
1193
False)
1194
1195
def _get_all_dbus_things(self, thing):
1196
"""Returns a generator of (name, attribute) pairs
1197
"""
1198
return ((getattr(athing.__get__(self), "_dbus_name", name),
1199
athing.__get__(self))
1200
for cls in self.__class__.__mro__
1201
for name, athing in
1202
inspect.getmembers(cls, self._is_dbus_thing(thing)))
1203
1204
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1205
out_signature = "s",
1206
path_keyword = 'object_path',
1207
connection_keyword = 'connection')
1208
def Introspect(self, object_path, connection):
1209
"""Overloading of standard D-Bus method.
1210
1211
Inserts annotation tags on methods and signals.
1212
"""
1213
xmlstring = dbus.service.Object.Introspect(self, object_path,
1214
connection)
1215
try:
1216
document = xml.dom.minidom.parseString(xmlstring)
1217
1218
for if_tag in document.getElementsByTagName("interface"):
1219
# Add annotation tags
1220
for typ in ("method", "signal"):
1221
for tag in if_tag.getElementsByTagName(typ):
1222
annots = dict()
1223
for name, prop in (self.
1224
_get_all_dbus_things(typ)):
1225
if (name == tag.getAttribute("name")
1226
and prop._dbus_interface
1227
== if_tag.getAttribute("name")):
1228
annots.update(getattr(
1229
prop, "_dbus_annotations", {}))
1230
for name, value in annots.items():
1231
ann_tag = document.createElement(
1232
"annotation")
1233
ann_tag.setAttribute("name", name)
1234
ann_tag.setAttribute("value", value)
1235
tag.appendChild(ann_tag)
1236
# Add interface annotation tags
1237
for annotation, value in dict(
1238
itertools.chain.from_iterable(
1239
annotations().items()
1240
for name, annotations
1241
in self._get_all_dbus_things("interface")
1242
if name == if_tag.getAttribute("name")
1243
)).items():
1244
ann_tag = document.createElement("annotation")
1245
ann_tag.setAttribute("name", annotation)
1246
ann_tag.setAttribute("value", value)
1247
if_tag.appendChild(ann_tag)
1248
# Fix argument name for the Introspect method itself
1249
if (if_tag.getAttribute("name")
1250
== dbus.INTROSPECTABLE_IFACE):
1251
for cn in if_tag.getElementsByTagName("method"):
1252
if cn.getAttribute("name") == "Introspect":
1253
for arg in cn.getElementsByTagName("arg"):
1254
if (arg.getAttribute("direction")
1255
== "out"):
1256
arg.setAttribute("name",
1257
"xml_data")
1258
xmlstring = document.toxml("utf-8")
1259
document.unlink()
1260
except (AttributeError, xml.dom.DOMException,
1261
xml.parsers.expat.ExpatError) as error:
1262
logger.error("Failed to override Introspection method",
1263
exc_info=error)
1264
return xmlstring
1265
1266
1267
class DBusObjectWithProperties(DBusObjectWithAnnotations):
1268
"""A D-Bus object with properties.
1269
1270
Classes inheriting from this can use the dbus_service_property
1271
decorator to expose methods as D-Bus properties. It exposes the
1272
standard Get(), Set(), and GetAll() methods on the D-Bus.
1273
"""
1274
1275
def _get_dbus_property(self, interface_name, property_name):
1276
"""Returns a bound method if one exists which is a D-Bus
1277
property with the specified name and interface.
1278
"""
1279
for cls in self.__class__.__mro__:
1280
for name, value in inspect.getmembers(
1281
cls, self._is_dbus_thing("property")):
1282
if (value._dbus_name == property_name
1283
and value._dbus_interface == interface_name):
1284
return value.__get__(self)
1285
1286
# No such property
1287
raise DBusPropertyNotFound("{}:{}.{}".format(
1288
self.dbus_object_path, interface_name, property_name))
1289
1290
@classmethod
1291
def _get_all_interface_names(cls):
1292
"""Get a sequence of all interfaces supported by an object"""
1293
return (name for name in set(getattr(getattr(x, attr),
1294
"_dbus_interface", None)
1295
for x in (inspect.getmro(cls))
1296
for attr in dir(x))
1297
if name is not None)
1298
1299
@dbus.service.method(dbus.PROPERTIES_IFACE,
1300
in_signature="ss",
1301
out_signature="v")
1302
def Get(self, interface_name, property_name):
1303
"""Standard D-Bus property Get() method, see D-Bus standard.
1304
"""
1305
prop = self._get_dbus_property(interface_name, property_name)
1306
if prop._dbus_access == "write":
1307
raise DBusPropertyAccessException(property_name)
1308
value = prop()
1309
if not hasattr(value, "variant_level"):
1310
return value
1311
return type(value)(value, variant_level=value.variant_level+1)
1312
1313
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
1314
def Set(self, interface_name, property_name, value):
1315
"""Standard D-Bus property Set() method, see D-Bus standard.
1316
"""
1317
prop = self._get_dbus_property(interface_name, property_name)
1318
if prop._dbus_access == "read":
1319
raise DBusPropertyAccessException(property_name)
1320
if prop._dbus_get_args_options["byte_arrays"]:
1321
# The byte_arrays option is not supported yet on
1322
# signatures other than "ay".
1323
if prop._dbus_signature != "ay":
1324
raise ValueError("Byte arrays not supported for non-"
1325
"'ay' signature {!r}"
1326
.format(prop._dbus_signature))
1327
value = dbus.ByteArray(b''.join(chr(byte)
1328
for byte in value))
1329
prop(value)
1330
1331
@dbus.service.method(dbus.PROPERTIES_IFACE,
1332
in_signature="s",
1333
out_signature="a{sv}")
1334
def GetAll(self, interface_name):
1335
"""Standard D-Bus property GetAll() method, see D-Bus
1336
standard.
1337
1338
Note: Will not include properties with access="write".
1339
"""
1340
properties = {}
1341
for name, prop in self._get_all_dbus_things("property"):
1342
if (interface_name
1343
and interface_name != prop._dbus_interface):
1344
# Interface non-empty but did not match
1345
continue
1346
# Ignore write-only properties
1347
if prop._dbus_access == "write":
1348
continue
1349
value = prop()
1350
if not hasattr(value, "variant_level"):
1351
properties[name] = value
1352
continue
1353
properties[name] = type(value)(
1354
value, variant_level = value.variant_level + 1)
1355
return dbus.Dictionary(properties, signature="sv")
1356
1357
@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
1358
def PropertiesChanged(self, interface_name, changed_properties,
1359
invalidated_properties):
1360
"""Standard D-Bus PropertiesChanged() signal, see D-Bus
1361
standard.
1362
"""
1363
pass
1364
1365
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1366
out_signature="s",
1367
path_keyword='object_path',
1368
connection_keyword='connection')
1369
def Introspect(self, object_path, connection):
1370
"""Overloading of standard D-Bus method.
1371
1372
Inserts property tags and interface annotation tags.
1373
"""
1374
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1375
object_path,
1376
connection)
1377
try:
1378
document = xml.dom.minidom.parseString(xmlstring)
1379
1380
def make_tag(document, name, prop):
1381
e = document.createElement("property")
1382
e.setAttribute("name", name)
1383
e.setAttribute("type", prop._dbus_signature)
1384
e.setAttribute("access", prop._dbus_access)
1385
return e
1386
1387
for if_tag in document.getElementsByTagName("interface"):
1388
# Add property tags
1389
for tag in (make_tag(document, name, prop)
1390
for name, prop
1391
in self._get_all_dbus_things("property")
1392
if prop._dbus_interface
1393
== if_tag.getAttribute("name")):
1394
if_tag.appendChild(tag)
1395
# Add annotation tags for properties
1396
for tag in if_tag.getElementsByTagName("property"):
1397
annots = dict()
1398
for name, prop in self._get_all_dbus_things(
1399
"property"):
1400
if (name == tag.getAttribute("name")
1401
and prop._dbus_interface
1402
== if_tag.getAttribute("name")):
1403
annots.update(getattr(
1404
prop, "_dbus_annotations", {}))
1405
for name, value in annots.items():
1406
ann_tag = document.createElement(
1407
"annotation")
1408
ann_tag.setAttribute("name", name)
1409
ann_tag.setAttribute("value", value)
1410
tag.appendChild(ann_tag)
1411
# Add the names to the return values for the
1412
# "org.freedesktop.DBus.Properties" methods
1413
if (if_tag.getAttribute("name")
1414
== "org.freedesktop.DBus.Properties"):
1415
for cn in if_tag.getElementsByTagName("method"):
1416
if cn.getAttribute("name") == "Get":
1417
for arg in cn.getElementsByTagName("arg"):
1418
if (arg.getAttribute("direction")
1419
== "out"):
1420
arg.setAttribute("name", "value")
1421
elif cn.getAttribute("name") == "GetAll":
1422
for arg in cn.getElementsByTagName("arg"):
1423
if (arg.getAttribute("direction")
1424
== "out"):
1425
arg.setAttribute("name", "props")
1426
xmlstring = document.toxml("utf-8")
1427
document.unlink()
1428
except (AttributeError, xml.dom.DOMException,
1429
xml.parsers.expat.ExpatError) as error:
1430
logger.error("Failed to override Introspection method",
1431
exc_info=error)
1432
return xmlstring
1433
1434
try:
1435
dbus.OBJECT_MANAGER_IFACE
1436
except AttributeError:
1437
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1438
1439
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1440
"""A D-Bus object with an ObjectManager.
1441
1442
Classes inheriting from this exposes the standard
1443
GetManagedObjects call and the InterfacesAdded and
1444
InterfacesRemoved signals on the standard
1445
"org.freedesktop.DBus.ObjectManager" interface.
1446
1447
Note: No signals are sent automatically; they must be sent
1448
manually.
1449
"""
1450
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1451
out_signature = "a{oa{sa{sv}}}")
1452
def GetManagedObjects(self):
1453
"""This function must be overridden"""
1454
raise NotImplementedError()
1455
1456
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1457
signature = "oa{sa{sv}}")
1458
def InterfacesAdded(self, object_path, interfaces_and_properties):
1459
pass
1460
1461
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature = "oas")
1462
def InterfacesRemoved(self, object_path, interfaces):
1463
pass
1464
1465
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1466
out_signature = "s",
1467
path_keyword = 'object_path',
1468
connection_keyword = 'connection')
1469
def Introspect(self, object_path, connection):
1470
"""Overloading of standard D-Bus method.
1471
1472
Override return argument name of GetManagedObjects to be
1473
"objpath_interfaces_and_properties"
1474
"""
1475
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1476
object_path,
1477
connection)
1478
try:
1479
document = xml.dom.minidom.parseString(xmlstring)
1480
1481
for if_tag in document.getElementsByTagName("interface"):
1482
# Fix argument name for the GetManagedObjects method
1483
if (if_tag.getAttribute("name")
1484
== dbus.OBJECT_MANAGER_IFACE):
1485
for cn in if_tag.getElementsByTagName("method"):
1486
if (cn.getAttribute("name")
1487
== "GetManagedObjects"):
1488
for arg in cn.getElementsByTagName("arg"):
1489
if (arg.getAttribute("direction")
1490
== "out"):
1491
arg.setAttribute(
1492
"name",
1493
"objpath_interfaces"
1494
"_and_properties")
1495
xmlstring = document.toxml("utf-8")
1496
document.unlink()
1497
except (AttributeError, xml.dom.DOMException,
1498
xml.parsers.expat.ExpatError) as error:
1499
logger.error("Failed to override Introspection method",
1500
exc_info = error)
1501
return xmlstring
1502
1503
def datetime_to_dbus(dt, variant_level=0):
1504
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1505
if dt is None:
1506
return dbus.String("", variant_level = variant_level)
1507
return dbus.String(dt.isoformat(), variant_level=variant_level)
1508
1509
1510
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1511
"""A class decorator; applied to a subclass of
1512
dbus.service.Object, it will add alternate D-Bus attributes with
1513
interface names according to the "alt_interface_names" mapping.
1514
Usage:
1515
1516
@alternate_dbus_interfaces({"org.example.Interface":
1517
"net.example.AlternateInterface"})
1518
class SampleDBusObject(dbus.service.Object):
1519
@dbus.service.method("org.example.Interface")
1520
def SampleDBusMethod():
1521
pass
1522
1523
The above "SampleDBusMethod" on "SampleDBusObject" will be
1524
reachable via two interfaces: "org.example.Interface" and
1525
"net.example.AlternateInterface", the latter of which will have
1526
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1527
"true", unless "deprecate" is passed with a False value.
1528
1529
This works for methods and signals, and also for D-Bus properties
1530
(from DBusObjectWithProperties) and interfaces (from the
1531
dbus_interface_annotations decorator).
1532
"""
1533
1534
def wrapper(cls):
1535
for orig_interface_name, alt_interface_name in (
1536
alt_interface_names.items()):
1537
attr = {}
1538
interface_names = set()
1539
# Go though all attributes of the class
1540
for attrname, attribute in inspect.getmembers(cls):
1541
# Ignore non-D-Bus attributes, and D-Bus attributes
1542
# with the wrong interface name
1543
if (not hasattr(attribute, "_dbus_interface")
1544
or not attribute._dbus_interface.startswith(
1545
orig_interface_name)):
1546
continue
1547
# Create an alternate D-Bus interface name based on
1548
# the current name
1549
alt_interface = attribute._dbus_interface.replace(
1550
orig_interface_name, alt_interface_name)
1551
interface_names.add(alt_interface)
1552
# Is this a D-Bus signal?
1553
if getattr(attribute, "_dbus_is_signal", False):
1554
# Extract the original non-method undecorated
1555
# function by black magic
1556
if sys.version_info.major == 2:
1557
nonmethod_func = (dict(
1558
zip(attribute.func_code.co_freevars,
1559
attribute.__closure__))
1560
["func"].cell_contents)
1561
else:
1562
nonmethod_func = (dict(
1563
zip(attribute.__code__.co_freevars,
1564
attribute.__closure__))
1565
["func"].cell_contents)
1566
# Create a new, but exactly alike, function
1567
# object, and decorate it to be a new D-Bus signal
1568
# with the alternate D-Bus interface name
1569
new_function = copy_function(nonmethod_func)
1570
new_function = (dbus.service.signal(
1571
alt_interface,
1572
attribute._dbus_signature)(new_function))
1573
# Copy annotations, if any
1574
try:
1575
new_function._dbus_annotations = dict(
1576
attribute._dbus_annotations)
1577
except AttributeError:
1578
pass
1579
# Define a creator of a function to call both the
1580
# original and alternate functions, so both the
1581
# original and alternate signals gets sent when
1582
# the function is called
1583
def fixscope(func1, func2):
1584
"""This function is a scope container to pass
1585
func1 and func2 to the "call_both" function
1586
outside of its arguments"""
1587
1588
@functools.wraps(func2)
1589
def call_both(*args, **kwargs):
1590
"""This function will emit two D-Bus
1591
signals by calling func1 and func2"""
1592
func1(*args, **kwargs)
1593
func2(*args, **kwargs)
1594
# Make wrapper function look like a D-Bus signal
1595
for name, attr in inspect.getmembers(func2):
1596
if name.startswith("_dbus_"):
1597
setattr(call_both, name, attr)
1598
1599
return call_both
1600
# Create the "call_both" function and add it to
1601
# the class
1602
attr[attrname] = fixscope(attribute, new_function)
1603
# Is this a D-Bus method?
1604
elif getattr(attribute, "_dbus_is_method", False):
1605
# Create a new, but exactly alike, function
1606
# object. Decorate it to be a new D-Bus method
1607
# with the alternate D-Bus interface name. Add it
1608
# to the class.
1609
attr[attrname] = (
1610
dbus.service.method(
1611
alt_interface,
1612
attribute._dbus_in_signature,
1613
attribute._dbus_out_signature)
1614
(copy_function(attribute)))
1615
# Copy annotations, if any
1616
try:
1617
attr[attrname]._dbus_annotations = dict(
1618
attribute._dbus_annotations)
1619
except AttributeError:
1620
pass
1621
# Is this a D-Bus property?
1622
elif getattr(attribute, "_dbus_is_property", False):
1623
# Create a new, but exactly alike, function
1624
# object, and decorate it to be a new D-Bus
1625
# property with the alternate D-Bus interface
1626
# name. Add it to the class.
1627
attr[attrname] = (dbus_service_property(
1628
alt_interface, attribute._dbus_signature,
1629
attribute._dbus_access,
1630
attribute._dbus_get_args_options
1631
["byte_arrays"])
1632
(copy_function(attribute)))
1633
# Copy annotations, if any
1634
try:
1635
attr[attrname]._dbus_annotations = dict(
1636
attribute._dbus_annotations)
1637
except AttributeError:
1638
pass
1639
# Is this a D-Bus interface?
1640
elif getattr(attribute, "_dbus_is_interface", False):
1641
# Create a new, but exactly alike, function
1642
# object. Decorate it to be a new D-Bus interface
1643
# with the alternate D-Bus interface name. Add it
1644
# to the class.
1645
attr[attrname] = (
1646
dbus_interface_annotations(alt_interface)
1647
(copy_function(attribute)))
1648
if deprecate:
1649
# Deprecate all alternate interfaces
1650
iname="_AlternateDBusNames_interface_annotation{}"
1651
for interface_name in interface_names:
1652
1653
@dbus_interface_annotations(interface_name)
1654
def func(self):
1655
return { "org.freedesktop.DBus.Deprecated":
1656
"true" }
1657
# Find an unused name
1658
for aname in (iname.format(i)
1659
for i in itertools.count()):
1660
if aname not in attr:
1661
attr[aname] = func
1662
break
1663
if interface_names:
1664
# Replace the class with a new subclass of it with
1665
# methods, signals, etc. as created above.
1666
if sys.version_info.major == 2:
1667
cls = type(b"{}Alternate".format(cls.__name__),
1668
(cls, ), attr)
1669
else:
1670
cls = type("{}Alternate".format(cls.__name__),
1671
(cls, ), attr)
1672
return cls
1673
1674
return wrapper
1675
1676
1677
@alternate_dbus_interfaces({"se.recompile.Mandos":
1678
"se.bsnet.fukt.Mandos"})
1679
class ClientDBus(Client, DBusObjectWithProperties):
1680
"""A Client class using D-Bus
1681
1682
Attributes:
1683
dbus_object_path: dbus.ObjectPath
1684
bus: dbus.SystemBus()
1685
"""
1686
1687
runtime_expansions = (Client.runtime_expansions
1688
+ ("dbus_object_path", ))
1689
1690
_interface = "se.recompile.Mandos.Client"
1691
1692
# dbus.service.Object doesn't use super(), so we can't either.
1693
1694
def __init__(self, bus = None, *args, **kwargs):
1695
self.bus = bus
1696
Client.__init__(self, *args, **kwargs)
1697
# Only now, when this client is initialized, can it show up on
1698
# the D-Bus
1699
client_object_name = str(self.name).translate(
1700
{ord("."): ord("_"),
1701
ord("-"): ord("_")})
1702
self.dbus_object_path = dbus.ObjectPath(
1703
"/clients/" + client_object_name)
1704
DBusObjectWithProperties.__init__(self, self.bus,
1705
self.dbus_object_path)
1706
1707
def notifychangeproperty(transform_func, dbus_name,
1708
type_func=lambda x: x,
1709
variant_level=1,
1710
invalidate_only=False,
1711
_interface=_interface):
1712
""" Modify a variable so that it's a property which announces
1713
its changes to DBus.
1714
1715
transform_fun: Function that takes a value and a variant_level
1716
and transforms it to a D-Bus type.
1717
dbus_name: D-Bus name of the variable
1718
type_func: Function that transform the value before sending it
1719
to the D-Bus. Default: no transform
1720
variant_level: D-Bus variant level. Default: 1
1721
"""
1722
attrname = "_{}".format(dbus_name)
1723
1724
def setter(self, value):
1725
if hasattr(self, "dbus_object_path"):
1726
if (not hasattr(self, attrname) or
1727
type_func(getattr(self, attrname, None))
1728
!= type_func(value)):
1729
if invalidate_only:
1730
self.PropertiesChanged(
1731
_interface, dbus.Dictionary(),
1732
dbus.Array((dbus_name, )))
1733
else:
1734
dbus_value = transform_func(
1735
type_func(value),
1736
variant_level = variant_level)
1737
self.PropertyChanged(dbus.String(dbus_name),
1738
dbus_value)
1739
self.PropertiesChanged(
1740
_interface,
1741
dbus.Dictionary({ dbus.String(dbus_name):
1742
dbus_value }),
1743
dbus.Array())
1744
setattr(self, attrname, value)
1745
1746
return property(lambda self: getattr(self, attrname), setter)
1747
1748
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1749
approvals_pending = notifychangeproperty(dbus.Boolean,
1750
"ApprovalPending",
1751
type_func = bool)
1752
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1753
last_enabled = notifychangeproperty(datetime_to_dbus,
1754
"LastEnabled")
1755
checker = notifychangeproperty(
1756
dbus.Boolean, "CheckerRunning",
1757
type_func = lambda checker: checker is not None)
1758
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1759
"LastCheckedOK")
1760
last_checker_status = notifychangeproperty(dbus.Int16,
1761
"LastCheckerStatus")
1762
last_approval_request = notifychangeproperty(
1763
datetime_to_dbus, "LastApprovalRequest")
1764
approved_by_default = notifychangeproperty(dbus.Boolean,
1765
"ApprovedByDefault")
1766
approval_delay = notifychangeproperty(
1767
dbus.UInt64, "ApprovalDelay",
1768
type_func = lambda td: td.total_seconds() * 1000)
1769
approval_duration = notifychangeproperty(
1770
dbus.UInt64, "ApprovalDuration",
1771
type_func = lambda td: td.total_seconds() * 1000)
1772
host = notifychangeproperty(dbus.String, "Host")
1773
timeout = notifychangeproperty(
1774
dbus.UInt64, "Timeout",
1775
type_func = lambda td: td.total_seconds() * 1000)
1776
extended_timeout = notifychangeproperty(
1777
dbus.UInt64, "ExtendedTimeout",
1778
type_func = lambda td: td.total_seconds() * 1000)
1779
interval = notifychangeproperty(
1780
dbus.UInt64, "Interval",
1781
type_func = lambda td: td.total_seconds() * 1000)
1782
checker_command = notifychangeproperty(dbus.String, "Checker")
1783
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1784
invalidate_only=True)
1785
1786
del notifychangeproperty
1787
1788
def __del__(self, *args, **kwargs):
1789
try:
1790
self.remove_from_connection()
1791
except LookupError:
1792
pass
1793
if hasattr(DBusObjectWithProperties, "__del__"):
1794
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1795
Client.__del__(self, *args, **kwargs)
1796
1797
def checker_callback(self, source, condition,
1798
connection, command, *args, **kwargs):
1799
ret = Client.checker_callback(self, source, condition,
1800
connection, command, *args,
1801
**kwargs)
1802
exitstatus = self.last_checker_status
1803
if exitstatus >= 0:
1804
# Emit D-Bus signal
1805
self.CheckerCompleted(dbus.Int16(exitstatus),
1806
# This is specific to GNU libC
1807
dbus.Int64(exitstatus << 8),
1808
dbus.String(command))
470
1809
else:
471
return now < (self.last_checked_ok + self.timeout)
472
473
## D-Bus methods & signals
474
_interface = u"se.bsnet.fukt.Mandos.Client"
475
476
# CheckedOK - method
477
CheckedOK = dbus.service.method(_interface)(checked_ok)
478
CheckedOK.__name__ = "CheckedOK"
1810
# Emit D-Bus signal
1811
self.CheckerCompleted(dbus.Int16(-1),
1812
dbus.Int64(
1813
# This is specific to GNU libC
1814
(exitstatus << 8)
1815
| self.last_checker_signal),
1816
dbus.String(command))
1817
return ret
1818
1819
def start_checker(self, *args, **kwargs):
1820
old_checker_pid = getattr(self.checker, "pid", None)
1821
r = Client.start_checker(self, *args, **kwargs)
1822
# Only if new checker process was started
1823
if (self.checker is not None
1824
and old_checker_pid != self.checker.pid):
1825
# Emit D-Bus signal
1826
self.CheckerStarted(self.current_checker_command)
1827
return r
1828
1829
def _reset_approved(self):
1830
self.approved = None
1831
return False
1832
1833
def approve(self, value=True):
1834
self.approved = value
1835
GObject.timeout_add(int(self.approval_duration.total_seconds()
1836
* 1000), self._reset_approved)
1837
self.send_changedstate()
1838
1839
## D-Bus methods, signals & properties
1840
1841
## Interfaces
1842
1843
## Signals
479
1844
480
1845
# CheckerCompleted - signal
481
1846
@dbus.service.signal(_interface, signature="nxs")
489
1854
"D-Bus signal"
490
1855
pass
491
1856
492
# GetAllProperties - method
493
@dbus.service.method(_interface, out_signature="a{sv}")
494
def GetAllProperties(self):
495
"D-Bus method"
496
return dbus.Dictionary({
497
dbus.String("name"):
498
dbus.String(self.name, variant_level=1),
499
dbus.String("fingerprint"):
500
dbus.String(self.fingerprint, variant_level=1),
501
dbus.String("host"):
502
dbus.String(self.host, variant_level=1),
503
dbus.String("created"):
504
_datetime_to_dbus(self.created, variant_level=1),
505
dbus.String("last_enabled"):
506
(_datetime_to_dbus(self.last_enabled,
507
variant_level=1)
508
if self.last_enabled is not None
509
else dbus.Boolean(False, variant_level=1)),
510
dbus.String("enabled"):
511
dbus.Boolean(self.enabled, variant_level=1),
512
dbus.String("last_checked_ok"):
513
(_datetime_to_dbus(self.last_checked_ok,
514
variant_level=1)
515
if self.last_checked_ok is not None
516
else dbus.Boolean (False, variant_level=1)),
517
dbus.String("timeout"):
518
dbus.UInt64(self.timeout_milliseconds(),
519
variant_level=1),
520
dbus.String("interval"):
521
dbus.UInt64(self.interval_milliseconds(),
522
variant_level=1),
523
dbus.String("checker"):
524
dbus.String(self.checker_command,
525
variant_level=1),
526
dbus.String("checker_running"):
527
dbus.Boolean(self.checker is not None,
528
variant_level=1),
529
dbus.String("object_path"):
530
dbus.ObjectPath(self.dbus_object_path,
531
variant_level=1)
532
}, signature="sv")
533
534
# IsStillValid - method
535
IsStillValid = (dbus.service.method(_interface, out_signature="b")
536
(still_valid))
537
IsStillValid.__name__ = "IsStillValid"
538
539
1857
# PropertyChanged - signal
1858
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
540
1859
@dbus.service.signal(_interface, signature="sv")
541
1860
def PropertyChanged(self, property, value):
542
1861
"D-Bus signal"
543
1862
pass
544
1863
545
# SetChecker - method
546
@dbus.service.method(_interface, in_signature="s")
547
def SetChecker(self, checker):
548
"D-Bus setter method"
549
self.checker_command = checker
550
# Emit D-Bus signal
551
self.PropertyChanged(dbus.String(u"checker"),
552
dbus.String(self.checker_command,
553
variant_level=1))
554
555
# SetHost - method
556
@dbus.service.method(_interface, in_signature="s")
557
def SetHost(self, host):
558
"D-Bus setter method"
559
self.host = host
560
# Emit D-Bus signal
561
self.PropertyChanged(dbus.String(u"host"),
562
dbus.String(self.host, variant_level=1))
563
564
# SetInterval - method
565
@dbus.service.method(_interface, in_signature="t")
566
def SetInterval(self, milliseconds):
567
self.interval = datetime.timedelta(0, 0, 0, milliseconds)
568
# Emit D-Bus signal
569
self.PropertyChanged(dbus.String(u"interval"),
570
(dbus.UInt64(self.interval_milliseconds(),
571
variant_level=1)))
572
573
# SetSecret - method
574
@dbus.service.method(_interface, in_signature="ay",
575
byte_arrays=True)
576
def SetSecret(self, secret):
577
"D-Bus setter method"
578
self.secret = str(secret)
579
580
# SetTimeout - method
581
@dbus.service.method(_interface, in_signature="t")
582
def SetTimeout(self, milliseconds):
583
self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
584
# Emit D-Bus signal
585
self.PropertyChanged(dbus.String(u"timeout"),
586
(dbus.UInt64(self.timeout_milliseconds(),
587
variant_level=1)))
1864
# GotSecret - signal
1865
@dbus.service.signal(_interface)
1866
def GotSecret(self):
1867
"""D-Bus signal
1868
Is sent after a successful transfer of secret from the Mandos
1869
server to mandos-client
1870
"""
1871
pass
1872
1873
# Rejected - signal
1874
@dbus.service.signal(_interface, signature="s")
1875
def Rejected(self, reason):
1876
"D-Bus signal"
1877
pass
1878
1879
# NeedApproval - signal
1880
@dbus.service.signal(_interface, signature="tb")
1881
def NeedApproval(self, timeout, default):
1882
"D-Bus signal"
1883
return self.need_approval()
1884
1885
## Methods
1886
1887
# Approve - method
1888
@dbus.service.method(_interface, in_signature="b")
1889
def Approve(self, value):
1890
self.approve(value)
1891
1892
# CheckedOK - method
1893
@dbus.service.method(_interface)
1894
def CheckedOK(self):
1895
self.checked_ok()
588
1896
589
1897
# Enable - method
590
Enable = dbus.service.method(_interface)(enable)
591
Enable.__name__ = "Enable"
1898
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1899
@dbus.service.method(_interface)
1900
def Enable(self):
1901
"D-Bus method"
1902
self.enable()
592
1903
593
1904
# StartChecker - method
1905
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
594
1906
@dbus.service.method(_interface)
595
1907
def StartChecker(self):
596
1908
"D-Bus method"
597
1909
self.start_checker()
598
1910
599
1911
# Disable - method
1912
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
600
1913
@dbus.service.method(_interface)
601
1914
def Disable(self):
602
1915
"D-Bus method"
603
1916
self.disable()
604
1917
605
1918
# StopChecker - method
606
StopChecker = dbus.service.method(_interface)(stop_checker)
607
StopChecker.__name__ = "StopChecker"
1919
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1920
@dbus.service.method(_interface)
1921
def StopChecker(self):
1922
self.stop_checker()
1923
1924
## Properties
1925
1926
# ApprovalPending - property
1927
@dbus_service_property(_interface, signature="b", access="read")
1928
def ApprovalPending_dbus_property(self):
1929
return dbus.Boolean(bool(self.approvals_pending))
1930
1931
# ApprovedByDefault - property
1932
@dbus_service_property(_interface,
1933
signature="b",
1934
access="readwrite")
1935
def ApprovedByDefault_dbus_property(self, value=None):
1936
if value is None: # get
1937
return dbus.Boolean(self.approved_by_default)
1938
self.approved_by_default = bool(value)
1939
1940
# ApprovalDelay - property
1941
@dbus_service_property(_interface,
1942
signature="t",
1943
access="readwrite")
1944
def ApprovalDelay_dbus_property(self, value=None):
1945
if value is None: # get
1946
return dbus.UInt64(self.approval_delay.total_seconds()
1947
* 1000)
1948
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1949
1950
# ApprovalDuration - property
1951
@dbus_service_property(_interface,
1952
signature="t",
1953
access="readwrite")
1954
def ApprovalDuration_dbus_property(self, value=None):
1955
if value is None: # get
1956
return dbus.UInt64(self.approval_duration.total_seconds()
1957
* 1000)
1958
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1959
1960
# Name - property
1961
@dbus_annotations(
1962
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1963
@dbus_service_property(_interface, signature="s", access="read")
1964
def Name_dbus_property(self):
1965
return dbus.String(self.name)
1966
1967
# Fingerprint - property
1968
@dbus_annotations(
1969
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1970
@dbus_service_property(_interface, signature="s", access="read")
1971
def Fingerprint_dbus_property(self):
1972
return dbus.String(self.fingerprint)
1973
1974
# Host - property
1975
@dbus_service_property(_interface,
1976
signature="s",
1977
access="readwrite")
1978
def Host_dbus_property(self, value=None):
1979
if value is None: # get
1980
return dbus.String(self.host)
1981
self.host = str(value)
1982
1983
# Created - property
1984
@dbus_annotations(
1985
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1986
@dbus_service_property(_interface, signature="s", access="read")
1987
def Created_dbus_property(self):
1988
return datetime_to_dbus(self.created)
1989
1990
# LastEnabled - property
1991
@dbus_service_property(_interface, signature="s", access="read")
1992
def LastEnabled_dbus_property(self):
1993
return datetime_to_dbus(self.last_enabled)
1994
1995
# Enabled - property
1996
@dbus_service_property(_interface,
1997
signature="b",
1998
access="readwrite")
1999
def Enabled_dbus_property(self, value=None):
2000
if value is None: # get
2001
return dbus.Boolean(self.enabled)
2002
if value:
2003
self.enable()
2004
else:
2005
self.disable()
2006
2007
# LastCheckedOK - property
2008
@dbus_service_property(_interface,
2009
signature="s",
2010
access="readwrite")
2011
def LastCheckedOK_dbus_property(self, value=None):
2012
if value is not None:
2013
self.checked_ok()
2014
return
2015
return datetime_to_dbus(self.last_checked_ok)
2016
2017
# LastCheckerStatus - property
2018
@dbus_service_property(_interface, signature="n", access="read")
2019
def LastCheckerStatus_dbus_property(self):
2020
return dbus.Int16(self.last_checker_status)
2021
2022
# Expires - property
2023
@dbus_service_property(_interface, signature="s", access="read")
2024
def Expires_dbus_property(self):
2025
return datetime_to_dbus(self.expires)
2026
2027
# LastApprovalRequest - property
2028
@dbus_service_property(_interface, signature="s", access="read")
2029
def LastApprovalRequest_dbus_property(self):
2030
return datetime_to_dbus(self.last_approval_request)
2031
2032
# Timeout - property
2033
@dbus_service_property(_interface,
2034
signature="t",
2035
access="readwrite")
2036
def Timeout_dbus_property(self, value=None):
2037
if value is None: # get
2038
return dbus.UInt64(self.timeout.total_seconds() * 1000)
2039
old_timeout = self.timeout
2040
self.timeout = datetime.timedelta(0, 0, 0, value)
2041
# Reschedule disabling
2042
if self.enabled:
2043
now = datetime.datetime.utcnow()
2044
self.expires += self.timeout - old_timeout
2045
if self.expires <= now:
2046
# The timeout has passed
2047
self.disable()
2048
else:
2049
if (getattr(self, "disable_initiator_tag", None)
2050
is None):
2051
return
2052
GObject.source_remove(self.disable_initiator_tag)
2053
self.disable_initiator_tag = GObject.timeout_add(
2054
int((self.expires - now).total_seconds() * 1000),
2055
self.disable)
2056
2057
# ExtendedTimeout - property
2058
@dbus_service_property(_interface,
2059
signature="t",
2060
access="readwrite")
2061
def ExtendedTimeout_dbus_property(self, value=None):
2062
if value is None: # get
2063
return dbus.UInt64(self.extended_timeout.total_seconds()
2064
* 1000)
2065
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
2066
2067
# Interval - property
2068
@dbus_service_property(_interface,
2069
signature="t",
2070
access="readwrite")
2071
def Interval_dbus_property(self, value=None):
2072
if value is None: # get
2073
return dbus.UInt64(self.interval.total_seconds() * 1000)
2074
self.interval = datetime.timedelta(0, 0, 0, value)
2075
if getattr(self, "checker_initiator_tag", None) is None:
2076
return
2077
if self.enabled:
2078
# Reschedule checker run
2079
GObject.source_remove(self.checker_initiator_tag)
2080
self.checker_initiator_tag = GObject.timeout_add(
2081
value, self.start_checker)
2082
self.start_checker() # Start one now, too
2083
2084
# Checker - property
2085
@dbus_service_property(_interface,
2086
signature="s",
2087
access="readwrite")
2088
def Checker_dbus_property(self, value=None):
2089
if value is None: # get
2090
return dbus.String(self.checker_command)
2091
self.checker_command = str(value)
2092
2093
# CheckerRunning - property
2094
@dbus_service_property(_interface,
2095
signature="b",
2096
access="readwrite")
2097
def CheckerRunning_dbus_property(self, value=None):
2098
if value is None: # get
2099
return dbus.Boolean(self.checker is not None)
2100
if value:
2101
self.start_checker()
2102
else:
2103
self.stop_checker()
2104
2105
# ObjectPath - property
2106
@dbus_annotations(
2107
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
2108
"org.freedesktop.DBus.Deprecated": "true"})
2109
@dbus_service_property(_interface, signature="o", access="read")
2110
def ObjectPath_dbus_property(self):
2111
return self.dbus_object_path # is already a dbus.ObjectPath
2112
2113
# Secret = property
2114
@dbus_annotations(
2115
{"org.freedesktop.DBus.Property.EmitsChangedSignal":
2116
"invalidates"})
2117
@dbus_service_property(_interface,
2118
signature="ay",
2119
access="write",
2120
byte_arrays=True)
2121
def Secret_dbus_property(self, value):
2122
self.secret = bytes(value)
608
2123
609
2124
del _interface
610
2125
611
2126
612
def peer_certificate(session):
613
"Return the peer's OpenPGP certificate as a bytestring"
614
# If not an OpenPGP certificate...
615
if (gnutls.library.functions
616
.gnutls_certificate_type_get(session._c_object)
617
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
618
# ...do the normal thing
619
return session.peer_certificate
620
list_size = ctypes.c_uint(1)
621
cert_list = (gnutls.library.functions
622
.gnutls_certificate_get_peers
623
(session._c_object, ctypes.byref(list_size)))
624
if not bool(cert_list) and list_size.value != 0:
625
raise gnutls.errors.GNUTLSError("error getting peer"
626
" certificate")
627
if list_size.value == 0:
628
return None
629
cert = cert_list[0]
630
return ctypes.string_at(cert.data, cert.size)
631
632
633
def fingerprint(openpgp):
634
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
635
# New GnuTLS "datum" with the OpenPGP public key
636
datum = (gnutls.library.types
637
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
638
ctypes.POINTER
639
(ctypes.c_ubyte)),
640
ctypes.c_uint(len(openpgp))))
641
# New empty GnuTLS certificate
642
crt = gnutls.library.types.gnutls_openpgp_crt_t()
643
(gnutls.library.functions
644
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
645
# Import the OpenPGP public key into the certificate
646
(gnutls.library.functions
647
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
648
gnutls.library.constants
649
.GNUTLS_OPENPGP_FMT_RAW))
650
# Verify the self signature in the key
651
crtverify = ctypes.c_uint()
652
(gnutls.library.functions
653
.gnutls_openpgp_crt_verify_self(crt, 0, ctypes.byref(crtverify)))
654
if crtverify.value != 0:
655
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
656
raise gnutls.errors.CertificateSecurityError("Verify failed")
657
# New buffer for the fingerprint
658
buf = ctypes.create_string_buffer(20)
659
buf_len = ctypes.c_size_t()
660
# Get the fingerprint from the certificate into the buffer
661
(gnutls.library.functions
662
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
663
ctypes.byref(buf_len)))
664
# Deinit the certificate
665
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
666
# Convert the buffer to a Python bytestring
667
fpr = ctypes.string_at(buf, buf_len.value)
668
# Convert the bytestring to hexadecimal notation
669
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
670
return hex_fpr
671
672
673
class TCP_handler(SocketServer.BaseRequestHandler, object):
674
"""A TCP request handler class.
675
Instantiated by IPv6_TCPServer for each request to handle it.
2127
class ProxyClient(object):
2128
def __init__(self, child_pipe, fpr, address):
2129
self._pipe = child_pipe
2130
self._pipe.send(('init', fpr, address))
2131
if not self._pipe.recv():
2132
raise KeyError(fpr)
2133
2134
def __getattribute__(self, name):
2135
if name == '_pipe':
2136
return super(ProxyClient, self).__getattribute__(name)
2137
self._pipe.send(('getattr', name))
2138
data = self._pipe.recv()
2139
if data[0] == 'data':
2140
return data[1]
2141
if data[0] == 'function':
2142
2143
def func(*args, **kwargs):
2144
self._pipe.send(('funcall', name, args, kwargs))
2145
return self._pipe.recv()[1]
2146
2147
return func
2148
2149
def __setattr__(self, name, value):
2150
if name == '_pipe':
2151
return super(ProxyClient, self).__setattr__(name, value)
2152
self._pipe.send(('setattr', name, value))
2153
2154
2155
class ClientHandler(socketserver.BaseRequestHandler, object):
2156
"""A class to handle client connections.
2157
2158
Instantiated once for each connection to handle it.
676
2159
Note: This will run in its own forked process."""
677
2160
678
2161
def handle(self):
679
logger.info(u"TCP connection from: %s",
680
unicode(self.client_address))
681
session = (gnutls.connection
682
.ClientSession(self.request,
683
gnutls.connection
684
.X509Credentials()))
685
686
line = self.request.makefile().readline()
687
logger.debug(u"Protocol version: %r", line)
688
try:
689
if int(line.strip().split()[0]) > 1:
690
raise RuntimeError
691
except (ValueError, IndexError, RuntimeError), error:
692
logger.error(u"Unknown protocol version: %s", error)
693
return
694
695
# Note: gnutls.connection.X509Credentials is really a generic
696
# GnuTLS certificate credentials object so long as no X.509
697
# keys are added to it. Therefore, we can use it here despite
698
# using OpenPGP certificates.
699
700
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
701
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
702
# "+DHE-DSS"))
703
# Use a fallback default, since this MUST be set.
704
priority = self.server.settings.get("priority", "NORMAL")
705
(gnutls.library.functions
706
.gnutls_priority_set_direct(session._c_object,
707
priority, None))
708
709
try:
710
session.handshake()
711
except gnutls.errors.GNUTLSError, error:
712
logger.warning(u"Handshake failed: %s", error)
713
# Do not run session.bye() here: the session is not
714
# established. Just abandon the request.
715
return
716
logger.debug(u"Handshake succeeded")
717
try:
718
fpr = fingerprint(peer_certificate(session))
719
except (TypeError, gnutls.errors.GNUTLSError), error:
720
logger.warning(u"Bad certificate: %s", error)
721
session.bye()
722
return
723
logger.debug(u"Fingerprint: %s", fpr)
724
725
for c in self.server.clients:
726
if c.fingerprint == fpr:
727
client = c
728
break
729
else:
730
logger.warning(u"Client not found for fingerprint: %s",
731
fpr)
732
session.bye()
733
return
734
# Have to check if client.still_valid(), since it is possible
735
# that the client timed out while establishing the GnuTLS
736
# session.
737
if not client.still_valid():
738
logger.warning(u"Client %(name)s is invalid",
739
vars(client))
740
session.bye()
741
return
742
## This won't work here, since we're in a fork.
743
# client.checked_ok()
744
sent_size = 0
745
while sent_size < len(client.secret):
746
sent = session.send(client.secret[sent_size:])
747
logger.debug(u"Sent: %d, remaining: %d",
748
sent, len(client.secret)
749
- (sent_size + sent))
750
sent_size += sent
751
session.bye()
752
753
754
class IPv6_TCPServer(SocketServer.ForkingMixIn,
755
SocketServer.TCPServer, object):
2162
with contextlib.closing(self.server.child_pipe) as child_pipe:
2163
logger.info("TCP connection from: %s",
2164
str(self.client_address))
2165
logger.debug("Pipe FD: %d",
2166
self.server.child_pipe.fileno())
2167
2168
session = gnutls.ClientSession(self.request)
2169
2170
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
2171
# "+AES-256-CBC", "+SHA1",
2172
# "+COMP-NULL", "+CTYPE-OPENPGP",
2173
# "+DHE-DSS"))
2174
# Use a fallback default, since this MUST be set.
2175
priority = self.server.gnutls_priority
2176
if priority is None:
2177
priority = "NORMAL"
2178
gnutls.priority_set_direct(session._c_object, priority,
2179
None)
2180
2181
# Start communication using the Mandos protocol
2182
# Get protocol number
2183
line = self.request.makefile().readline()
2184
logger.debug("Protocol version: %r", line)
2185
try:
2186
if int(line.strip().split()[0]) > 1:
2187
raise RuntimeError(line)
2188
except (ValueError, IndexError, RuntimeError) as error:
2189
logger.error("Unknown protocol version: %s", error)
2190
return
2191
2192
# Start GnuTLS connection
2193
try:
2194
session.handshake()
2195
except gnutls.Error as error:
2196
logger.warning("Handshake failed: %s", error)
2197
# Do not run session.bye() here: the session is not
2198
# established. Just abandon the request.
2199
return
2200
logger.debug("Handshake succeeded")
2201
2202
approval_required = False
2203
try:
2204
try:
2205
fpr = self.fingerprint(
2206
self.peer_certificate(session))
2207
except (TypeError, gnutls.Error) as error:
2208
logger.warning("Bad certificate: %s", error)
2209
return
2210
logger.debug("Fingerprint: %s", fpr)
2211
2212
try:
2213
client = ProxyClient(child_pipe, fpr,
2214
self.client_address)
2215
except KeyError:
2216
return
2217
2218
if client.approval_delay:
2219
delay = client.approval_delay
2220
client.approvals_pending += 1
2221
approval_required = True
2222
2223
while True:
2224
if not client.enabled:
2225
logger.info("Client %s is disabled",
2226
client.name)
2227
if self.server.use_dbus:
2228
# Emit D-Bus signal
2229
client.Rejected("Disabled")
2230
return
2231
2232
if client.approved or not client.approval_delay:
2233
#We are approved or approval is disabled
2234
break
2235
elif client.approved is None:
2236
logger.info("Client %s needs approval",
2237
client.name)
2238
if self.server.use_dbus:
2239
# Emit D-Bus signal
2240
client.NeedApproval(
2241
client.approval_delay.total_seconds()
2242
* 1000, client.approved_by_default)
2243
else:
2244
logger.warning("Client %s was not approved",
2245
client.name)
2246
if self.server.use_dbus:
2247
# Emit D-Bus signal
2248
client.Rejected("Denied")
2249
return
2250
2251
#wait until timeout or approved
2252
time = datetime.datetime.now()
2253
client.changedstate.acquire()
2254
client.changedstate.wait(delay.total_seconds())
2255
client.changedstate.release()
2256
time2 = datetime.datetime.now()
2257
if (time2 - time) >= delay:
2258
if not client.approved_by_default:
2259
logger.warning("Client %s timed out while"
2260
" waiting for approval",
2261
client.name)
2262
if self.server.use_dbus:
2263
# Emit D-Bus signal
2264
client.Rejected("Approval timed out")
2265
return
2266
else:
2267
break
2268
else:
2269
delay -= time2 - time
2270
2271
try:
2272
session.send(client.secret)
2273
except gnutls.Error as error:
2274
logger.warning("gnutls send failed",
2275
exc_info = error)
2276
return
2277
2278
logger.info("Sending secret to %s", client.name)
2279
# bump the timeout using extended_timeout
2280
client.bump_timeout(client.extended_timeout)
2281
if self.server.use_dbus:
2282
# Emit D-Bus signal
2283
client.GotSecret()
2284
2285
finally:
2286
if approval_required:
2287
client.approvals_pending -= 1
2288
try:
2289
session.bye()
2290
except gnutls.Error as error:
2291
logger.warning("GnuTLS bye failed",
2292
exc_info=error)
2293
2294
@staticmethod
2295
def peer_certificate(session):
2296
"Return the peer's OpenPGP certificate as a bytestring"
2297
# If not an OpenPGP certificate...
2298
if (gnutls.certificate_type_get(session._c_object)
2299
!= gnutls.CRT_OPENPGP):
2300
# ...return invalid data
2301
return b""
2302
list_size = ctypes.c_uint(1)
2303
cert_list = (gnutls.certificate_get_peers
2304
(session._c_object, ctypes.byref(list_size)))
2305
if not bool(cert_list) and list_size.value != 0:
2306
raise gnutls.Error("error getting peer certificate")
2307
if list_size.value == 0:
2308
return None
2309
cert = cert_list[0]
2310
return ctypes.string_at(cert.data, cert.size)
2311
2312
@staticmethod
2313
def fingerprint(openpgp):
2314
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
2315
# New GnuTLS "datum" with the OpenPGP public key
2316
datum = gnutls.datum_t(
2317
ctypes.cast(ctypes.c_char_p(openpgp),
2318
ctypes.POINTER(ctypes.c_ubyte)),
2319
ctypes.c_uint(len(openpgp)))
2320
# New empty GnuTLS certificate
2321
crt = gnutls.openpgp_crt_t()
2322
gnutls.openpgp_crt_init(ctypes.byref(crt))
2323
# Import the OpenPGP public key into the certificate
2324
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2325
gnutls.OPENPGP_FMT_RAW)
2326
# Verify the self signature in the key
2327
crtverify = ctypes.c_uint()
2328
gnutls.openpgp_crt_verify_self(crt, 0,
2329
ctypes.byref(crtverify))
2330
if crtverify.value != 0:
2331
gnutls.openpgp_crt_deinit(crt)
2332
raise gnutls.CertificateSecurityError("Verify failed")
2333
# New buffer for the fingerprint
2334
buf = ctypes.create_string_buffer(20)
2335
buf_len = ctypes.c_size_t()
2336
# Get the fingerprint from the certificate into the buffer
2337
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2338
ctypes.byref(buf_len))
2339
# Deinit the certificate
2340
gnutls.openpgp_crt_deinit(crt)
2341
# Convert the buffer to a Python bytestring
2342
fpr = ctypes.string_at(buf, buf_len.value)
2343
# Convert the bytestring to hexadecimal notation
2344
hex_fpr = binascii.hexlify(fpr).upper()
2345
return hex_fpr
2346
2347
2348
class MultiprocessingMixIn(object):
2349
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2350
2351
def sub_process_main(self, request, address):
2352
try:
2353
self.finish_request(request, address)
2354
except Exception:
2355
self.handle_error(request, address)
2356
self.close_request(request)
2357
2358
def process_request(self, request, address):
2359
"""Start a new process to process the request."""
2360
proc = multiprocessing.Process(target = self.sub_process_main,
2361
args = (request, address))
2362
proc.start()
2363
return proc
2364
2365
2366
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
2367
""" adds a pipe to the MixIn """
2368
2369
def process_request(self, request, client_address):
2370
"""Overrides and wraps the original process_request().
2371
2372
This function creates a new pipe in self.pipe
2373
"""
2374
parent_pipe, self.child_pipe = multiprocessing.Pipe()
2375
2376
proc = MultiprocessingMixIn.process_request(self, request,
2377
client_address)
2378
self.child_pipe.close()
2379
self.add_pipe(parent_pipe, proc)
2380
2381
def add_pipe(self, parent_pipe, proc):
2382
"""Dummy function; override as necessary"""
2383
raise NotImplementedError()
2384
2385
2386
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
2387
socketserver.TCPServer, object):
756
2388
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
2389
757
2390
Attributes:
758
settings: Server settings
759
clients: Set() of Client objects
760
2391
enabled: Boolean; whether this server is activated yet
2392
interface: None or a network interface name (string)
2393
use_ipv6: Boolean; to use IPv6 or not
761
2394
"""
762
address_family = socket.AF_INET6
763
def __init__(self, *args, **kwargs):
764
if "settings" in kwargs:
765
self.settings = kwargs["settings"]
766
del kwargs["settings"]
767
if "clients" in kwargs:
768
self.clients = kwargs["clients"]
769
del kwargs["clients"]
770
if "use_ipv6" in kwargs:
771
if not kwargs["use_ipv6"]:
772
self.address_family = socket.AF_INET
773
del kwargs["use_ipv6"]
774
self.enabled = False
775
super(IPv6_TCPServer, self).__init__(*args, **kwargs)
2395
2396
def __init__(self, server_address, RequestHandlerClass,
2397
interface=None,
2398
use_ipv6=True,
2399
socketfd=None):
2400
"""If socketfd is set, use that file descriptor instead of
2401
creating a new one with socket.socket().
2402
"""
2403
self.interface = interface
2404
if use_ipv6:
2405
self.address_family = socket.AF_INET6
2406
if socketfd is not None:
2407
# Save the file descriptor
2408
self.socketfd = socketfd
2409
# Save the original socket.socket() function
2410
self.socket_socket = socket.socket
2411
# To implement --socket, we monkey patch socket.socket.
2412
#
2413
# (When socketserver.TCPServer is a new-style class, we
2414
# could make self.socket into a property instead of monkey
2415
# patching socket.socket.)
2416
#
2417
# Create a one-time-only replacement for socket.socket()
2418
@functools.wraps(socket.socket)
2419
def socket_wrapper(*args, **kwargs):
2420
# Restore original function so subsequent calls are
2421
# not affected.
2422
socket.socket = self.socket_socket
2423
del self.socket_socket
2424
# This time only, return a new socket object from the
2425
# saved file descriptor.
2426
return socket.fromfd(self.socketfd, *args, **kwargs)
2427
# Replace socket.socket() function with wrapper
2428
socket.socket = socket_wrapper
2429
# The socketserver.TCPServer.__init__ will call
2430
# socket.socket(), which might be our replacement,
2431
# socket_wrapper(), if socketfd was set.
2432
socketserver.TCPServer.__init__(self, server_address,
2433
RequestHandlerClass)
2434
776
2435
def server_bind(self):
777
2436
"""This overrides the normal server_bind() function
778
2437
to bind to an interface if one was specified, and also NOT to
779
2438
bind to an address or port if they were not specified."""
780
if self.settings["interface"]:
781
# 25 is from /usr/include/asm-i486/socket.h
782
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
783
try:
784
self.socket.setsockopt(socket.SOL_SOCKET,
785
SO_BINDTODEVICE,
786
self.settings["interface"])
787
except socket.error, error:
788
if error[0] == errno.EPERM:
789
logger.error(u"No permission to"
790
u" bind to interface %s",
791
self.settings["interface"])
792
else:
793
raise
2439
if self.interface is not None:
2440
if SO_BINDTODEVICE is None:
2441
logger.error("SO_BINDTODEVICE does not exist;"
2442
" cannot bind to interface %s",
2443
self.interface)
2444
else:
2445
try:
2446
self.socket.setsockopt(
2447
socket.SOL_SOCKET, SO_BINDTODEVICE,
2448
(self.interface + "\0").encode("utf-8"))
2449
except socket.error as error:
2450
if error.errno == errno.EPERM:
2451
logger.error("No permission to bind to"
2452
" interface %s", self.interface)
2453
elif error.errno == errno.ENOPROTOOPT:
2454
logger.error("SO_BINDTODEVICE not available;"
2455
" cannot bind to interface %s",
2456
self.interface)
2457
elif error.errno == errno.ENODEV:
2458
logger.error("Interface %s does not exist,"
2459
" cannot bind", self.interface)
2460
else:
2461
raise
794
2462
# Only bind(2) the socket if we really need to.
795
2463
if self.server_address[0] or self.server_address[1]:
796
2464
if not self.server_address[0]:
797
2465
if self.address_family == socket.AF_INET6:
798
2466
any_address = "::" # in6addr_any
799
2467
else:
800
any_address = socket.INADDR_ANY
2468
any_address = "0.0.0.0" # INADDR_ANY
801
2469
self.server_address = (any_address,
802
2470
self.server_address[1])
803
2471
elif not self.server_address[1]:
804
self.server_address = (self.server_address[0],
805
0)
806
# if self.settings["interface"]:
2472
self.server_address = (self.server_address[0], 0)
2473
# if self.interface:
807
2474
# self.server_address = (self.server_address[0],
808
2475
# 0, # port
809
2476
# 0, # flowinfo
810
2477
# if_nametoindex
811
# (self.settings
812
# ["interface"]))
813
return super(IPv6_TCPServer, self).server_bind()
2478
# (self.interface))
2479
return socketserver.TCPServer.server_bind(self)
2480
2481
2482
class MandosServer(IPv6_TCPServer):
2483
"""Mandos server.
2484
2485
Attributes:
2486
clients: set of Client objects
2487
gnutls_priority GnuTLS priority string
2488
use_dbus: Boolean; to emit D-Bus signals or not
2489
2490
Assumes a GObject.MainLoop event loop.
2491
"""
2492
2493
def __init__(self, server_address, RequestHandlerClass,
2494
interface=None,
2495
use_ipv6=True,
2496
clients=None,
2497
gnutls_priority=None,
2498
use_dbus=True,
2499
socketfd=None):
2500
self.enabled = False
2501
self.clients = clients
2502
if self.clients is None:
2503
self.clients = {}
2504
self.use_dbus = use_dbus
2505
self.gnutls_priority = gnutls_priority
2506
IPv6_TCPServer.__init__(self, server_address,
2507
RequestHandlerClass,
2508
interface = interface,
2509
use_ipv6 = use_ipv6,
2510
socketfd = socketfd)
2511
814
2512
def server_activate(self):
815
2513
if self.enabled:
816
return super(IPv6_TCPServer, self).server_activate()
2514
return socketserver.TCPServer.server_activate(self)
2515
817
2516
def enable(self):
818
2517
self.enabled = True
2518
2519
def add_pipe(self, parent_pipe, proc):
2520
# Call "handle_ipc" for both data and EOF events
2521
GObject.io_add_watch(
2522
parent_pipe.fileno(),
2523
GObject.IO_IN | GObject.IO_HUP,
2524
functools.partial(self.handle_ipc,
2525
parent_pipe = parent_pipe,
2526
proc = proc))
2527
2528
def handle_ipc(self, source, condition,
2529
parent_pipe=None,
2530
proc = None,
2531
client_object=None):
2532
# error, or the other end of multiprocessing.Pipe has closed
2533
if condition & (GObject.IO_ERR | GObject.IO_HUP):
2534
# Wait for other process to exit
2535
proc.join()
2536
return False
2537
2538
# Read a request from the child
2539
request = parent_pipe.recv()
2540
command = request[0]
2541
2542
if command == 'init':
2543
fpr = request[1]
2544
address = request[2]
2545
2546
for c in self.clients.values():
2547
if c.fingerprint == fpr:
2548
client = c
2549
break
2550
else:
2551
logger.info("Client not found for fingerprint: %s, ad"
2552
"dress: %s", fpr, address)
2553
if self.use_dbus:
2554
# Emit D-Bus signal
2555
mandos_dbus_service.ClientNotFound(fpr,
2556
address[0])
2557
parent_pipe.send(False)
2558
return False
2559
2560
GObject.io_add_watch(
2561
parent_pipe.fileno(),
2562
GObject.IO_IN | GObject.IO_HUP,
2563
functools.partial(self.handle_ipc,
2564
parent_pipe = parent_pipe,
2565
proc = proc,
2566
client_object = client))
2567
parent_pipe.send(True)
2568
# remove the old hook in favor of the new above hook on
2569
# same fileno
2570
return False
2571
if command == 'funcall':
2572
funcname = request[1]
2573
args = request[2]
2574
kwargs = request[3]
2575
2576
parent_pipe.send(('data', getattr(client_object,
2577
funcname)(*args,
2578
**kwargs)))
2579
2580
if command == 'getattr':
2581
attrname = request[1]
2582
if isinstance(client_object.__getattribute__(attrname),
2583
collections.Callable):
2584
parent_pipe.send(('function', ))
2585
else:
2586
parent_pipe.send((
2587
'data', client_object.__getattribute__(attrname)))
2588
2589
if command == 'setattr':
2590
attrname = request[1]
2591
value = request[2]
2592
setattr(client_object, attrname, value)
2593
2594
return True
2595
2596
2597
def rfc3339_duration_to_delta(duration):
2598
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2599
2600
>>> rfc3339_duration_to_delta("P7D")
2601
datetime.timedelta(7)
2602
>>> rfc3339_duration_to_delta("PT60S")
2603
datetime.timedelta(0, 60)
2604
>>> rfc3339_duration_to_delta("PT60M")
2605
datetime.timedelta(0, 3600)
2606
>>> rfc3339_duration_to_delta("PT24H")
2607
datetime.timedelta(1)
2608
>>> rfc3339_duration_to_delta("P1W")
2609
datetime.timedelta(7)
2610
>>> rfc3339_duration_to_delta("PT5M30S")
2611
datetime.timedelta(0, 330)
2612
>>> rfc3339_duration_to_delta("P1DT3M20S")
2613
datetime.timedelta(1, 200)
2614
"""
2615
2616
# Parsing an RFC 3339 duration with regular expressions is not
2617
# possible - there would have to be multiple places for the same
2618
# values, like seconds. The current code, while more esoteric, is
2619
# cleaner without depending on a parsing library. If Python had a
2620
# built-in library for parsing we would use it, but we'd like to
2621
# avoid excessive use of external libraries.
2622
2623
# New type for defining tokens, syntax, and semantics all-in-one
2624
Token = collections.namedtuple("Token", (
2625
"regexp", # To match token; if "value" is not None, must have
2626
# a "group" containing digits
2627
"value", # datetime.timedelta or None
2628
"followers")) # Tokens valid after this token
2629
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2630
# the "duration" ABNF definition in RFC 3339, Appendix A.
2631
token_end = Token(re.compile(r"$"), None, frozenset())
2632
token_second = Token(re.compile(r"(\d+)S"),
2633
datetime.timedelta(seconds=1),
2634
frozenset((token_end, )))
2635
token_minute = Token(re.compile(r"(\d+)M"),
2636
datetime.timedelta(minutes=1),
2637
frozenset((token_second, token_end)))
2638
token_hour = Token(re.compile(r"(\d+)H"),
2639
datetime.timedelta(hours=1),
2640
frozenset((token_minute, token_end)))
2641
token_time = Token(re.compile(r"T"),
2642
None,
2643
frozenset((token_hour, token_minute,
2644
token_second)))
2645
token_day = Token(re.compile(r"(\d+)D"),
2646
datetime.timedelta(days=1),
2647
frozenset((token_time, token_end)))
2648
token_month = Token(re.compile(r"(\d+)M"),
2649
datetime.timedelta(weeks=4),
2650
frozenset((token_day, token_end)))
2651
token_year = Token(re.compile(r"(\d+)Y"),
2652
datetime.timedelta(weeks=52),
2653
frozenset((token_month, token_end)))
2654
token_week = Token(re.compile(r"(\d+)W"),
2655
datetime.timedelta(weeks=1),
2656
frozenset((token_end, )))
2657
token_duration = Token(re.compile(r"P"), None,
2658
frozenset((token_year, token_month,
2659
token_day, token_time,
2660
token_week)))
2661
# Define starting values
2662
value = datetime.timedelta() # Value so far
2663
found_token = None
2664
followers = frozenset((token_duration, )) # Following valid tokens
2665
s = duration # String left to parse
2666
# Loop until end token is found
2667
while found_token is not token_end:
2668
# Search for any currently valid tokens
2669
for token in followers:
2670
match = token.regexp.match(s)
2671
if match is not None:
2672
# Token found
2673
if token.value is not None:
2674
# Value found, parse digits
2675
factor = int(match.group(1), 10)
2676
# Add to value so far
2677
value += factor * token.value
2678
# Strip token from string
2679
s = token.regexp.sub("", s, 1)
2680
# Go to found token
2681
found_token = token
2682
# Set valid next tokens
2683
followers = found_token.followers
2684
break
2685
else:
2686
# No currently valid tokens were found
2687
raise ValueError("Invalid RFC 3339 duration: {!r}"
2688
.format(duration))
2689
# End token found
2690
return value
819
2691
820
2692
821
2693
def string_to_delta(interval):
829
2701
datetime.timedelta(0, 3600)
830
2702
>>> string_to_delta('24h')
831
2703
datetime.timedelta(1)
832
>>> string_to_delta(u'1w')
2704
>>> string_to_delta('1w')
833
2705
datetime.timedelta(7)
834
2706
>>> string_to_delta('5m 30s')
835
2707
datetime.timedelta(0, 330)
836
2708
"""
2709
2710
try:
2711
return rfc3339_duration_to_delta(interval)
2712
except ValueError:
2713
pass
2714
837
2715
timevalue = datetime.timedelta(0)
838
2716
for s in interval.split():
839
2717
try:
840
suffix = unicode(s[-1])
2718
suffix = s[-1]
841
2719
value = int(s[:-1])
842
if suffix == u"d":
2720
if suffix == "d":
843
2721
delta = datetime.timedelta(value)
844
elif suffix == u"s":
2722
elif suffix == "s":
845
2723
delta = datetime.timedelta(0, value)
846
elif suffix == u"m":
2724
elif suffix == "m":
847
2725
delta = datetime.timedelta(0, 0, 0, 0, value)
848
elif suffix == u"h":
2726
elif suffix == "h":
849
2727
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
850
elif suffix == u"w":
2728
elif suffix == "w":
851
2729
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
852
2730
else:
853
raise ValueError
854
except (ValueError, IndexError):
855
raise ValueError
2731
raise ValueError("Unknown suffix {!r}".format(suffix))
2732
except IndexError as e:
2733
raise ValueError(*(e.args))
856
2734
timevalue += delta
857
2735
return timevalue
858
2736
859
2737
860
def server_state_changed(state):
861
"""Derived from the Avahi example code"""
862
if state == avahi.SERVER_COLLISION:
863
logger.error(u"Zeroconf server name collision")
864
service.remove()
865
elif state == avahi.SERVER_RUNNING:
866
service.add()
867
868
869
def entry_group_state_changed(state, error):
870
"""Derived from the Avahi example code"""
871
logger.debug(u"Avahi state change: %i", state)
872
873
if state == avahi.ENTRY_GROUP_ESTABLISHED:
874
logger.debug(u"Zeroconf service established.")
875
elif state == avahi.ENTRY_GROUP_COLLISION:
876
logger.warning(u"Zeroconf service name collision.")
877
service.rename()
878
elif state == avahi.ENTRY_GROUP_FAILURE:
879
logger.critical(u"Avahi: Error in group state changed %s",
880
unicode(error))
881
raise AvahiGroupError(u"State changed: %s" % unicode(error))
882
883
def if_nametoindex(interface):
884
"""Call the C function if_nametoindex(), or equivalent"""
885
global if_nametoindex
886
try:
887
if_nametoindex = (ctypes.cdll.LoadLibrary
888
(ctypes.util.find_library("c"))
889
.if_nametoindex)
890
except (OSError, AttributeError):
891
if "struct" not in sys.modules:
892
import struct
893
if "fcntl" not in sys.modules:
894
import fcntl
895
def if_nametoindex(interface):
896
"Get an interface index the hard way, i.e. using fcntl()"
897
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
898
with closing(socket.socket()) as s:
899
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
900
struct.pack("16s16x", interface))
901
interface_index = struct.unpack("I", ifreq[16:20])[0]
902
return interface_index
903
return if_nametoindex(interface)
904
905
906
2738
def daemon(nochdir = False, noclose = False):
907
2739
"""See daemon(3). Standard BSD Unix function.
2740
908
2741
This should really exist as os.daemon, but it doesn't (yet)."""
909
2742
if os.fork():
910
2743
sys.exit()
915
2748
sys.exit()
916
2749
if not noclose:
917
2750
# Close all standard open file descriptors
918
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2751
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
919
2752
if not stat.S_ISCHR(os.fstat(null).st_mode):
920
2753
raise OSError(errno.ENODEV,
921
"/dev/null not a character device")
2754
"{} not a character device"
2755
.format(os.devnull))
922
2756
os.dup2(null, sys.stdin.fileno())
923
2757
os.dup2(null, sys.stdout.fileno())
924
2758
os.dup2(null, sys.stderr.fileno())
927
2761
928
2762
929
2763
def main():
930
parser = optparse.OptionParser(version = "%%prog %s" % version)
931
parser.add_option("-i", "--interface", type="string",
932
metavar="IF", help="Bind to interface IF")
933
parser.add_option("-a", "--address", type="string",
934
help="Address to listen for requests on")
935
parser.add_option("-p", "--port", type="int",
936
help="Port number to receive requests on")
937
parser.add_option("--check", action="store_true",
938
help="Run self-test")
939
parser.add_option("--debug", action="store_true",
940
help="Debug mode; run in foreground and log to"
941
" terminal")
942
parser.add_option("--priority", type="string", help="GnuTLS"
943
" priority string (see GnuTLS documentation)")
944
parser.add_option("--servicename", type="string", metavar="NAME",
945
help="Zeroconf service name")
946
parser.add_option("--configdir", type="string",
947
default="/etc/mandos", metavar="DIR",
948
help="Directory to search for configuration"
949
" files")
950
parser.add_option("--no-dbus", action="store_false",
951
dest="use_dbus",
952
help=optparse.SUPPRESS_HELP) # XXX: Not done yet
953
parser.add_option("--no-ipv6", action="store_false",
954
dest="use_ipv6", help="Do not use IPv6")
955
options = parser.parse_args()[0]
2764
2765
##################################################################
2766
# Parsing of options, both command line and config file
2767
2768
parser = argparse.ArgumentParser()
2769
parser.add_argument("-v", "--version", action="version",
2770
version = "%(prog)s {}".format(version),
2771
help="show version number and exit")
2772
parser.add_argument("-i", "--interface", metavar="IF",
2773
help="Bind to interface IF")
2774
parser.add_argument("-a", "--address",
2775
help="Address to listen for requests on")
2776
parser.add_argument("-p", "--port", type=int,
2777
help="Port number to receive requests on")
2778
parser.add_argument("--check", action="store_true",
2779
help="Run self-test")
2780
parser.add_argument("--debug", action="store_true",
2781
help="Debug mode; run in foreground and log"
2782
" to terminal", default=None)
2783
parser.add_argument("--debuglevel", metavar="LEVEL",
2784
help="Debug level for stdout output")
2785
parser.add_argument("--priority", help="GnuTLS"
2786
" priority string (see GnuTLS documentation)")
2787
parser.add_argument("--servicename",
2788
metavar="NAME", help="Zeroconf service name")
2789
parser.add_argument("--configdir",
2790
default="/etc/mandos", metavar="DIR",
2791
help="Directory to search for configuration"
2792
" files")
2793
parser.add_argument("--no-dbus", action="store_false",
2794
dest="use_dbus", help="Do not provide D-Bus"
2795
" system bus interface", default=None)
2796
parser.add_argument("--no-ipv6", action="store_false",
2797
dest="use_ipv6", help="Do not use IPv6",
2798
default=None)
2799
parser.add_argument("--no-restore", action="store_false",
2800
dest="restore", help="Do not restore stored"
2801
" state", default=None)
2802
parser.add_argument("--socket", type=int,
2803
help="Specify a file descriptor to a network"
2804
" socket to use instead of creating one")
2805
parser.add_argument("--statedir", metavar="DIR",
2806
help="Directory to save/restore state in")
2807
parser.add_argument("--foreground", action="store_true",
2808
help="Run in foreground", default=None)
2809
parser.add_argument("--no-zeroconf", action="store_false",
2810
dest="zeroconf", help="Do not use Zeroconf",
2811
default=None)
2812
2813
options = parser.parse_args()
956
2814
957
2815
if options.check:
958
2816
import doctest
959
doctest.testmod()
960
sys.exit()
2817
fail_count, test_count = doctest.testmod()
2818
sys.exit(os.EX_OK if fail_count == 0 else 1)
961
2819
962
2820
# Default values for config file for server-global settings
963
2821
server_defaults = { "interface": "",
965
2823
"port": "",
966
2824
"debug": "False",
967
2825
"priority":
968
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2826
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2827
":+SIGN-DSA-SHA256",
969
2828
"servicename": "Mandos",
970
2829
"use_dbus": "True",
971
2830
"use_ipv6": "True",
972
}
2831
"debuglevel": "",
2832
"restore": "True",
2833
"socket": "",
2834
"statedir": "/var/lib/mandos",
2835
"foreground": "False",
2836
"zeroconf": "True",
2837
}
973
2838
974
2839
# Parse config file for server-global settings
975
server_config = ConfigParser.SafeConfigParser(server_defaults)
2840
server_config = configparser.SafeConfigParser(server_defaults)
976
2841
del server_defaults
977
2842
server_config.read(os.path.join(options.configdir, "mandos.conf"))
978
2843
# Convert the SafeConfigParser object to a dict
979
2844
server_settings = server_config.defaults()
980
2845
# Use the appropriate methods on the non-string config options
981
server_settings["debug"] = server_config.getboolean("DEFAULT",
982
"debug")
983
server_settings["use_dbus"] = server_config.getboolean("DEFAULT",
984
"use_dbus")
985
server_settings["use_ipv6"] = server_config.getboolean("DEFAULT",
986
"use_ipv6")
2846
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
2847
server_settings[option] = server_config.getboolean("DEFAULT",
2848
option)
987
2849
if server_settings["port"]:
988
2850
server_settings["port"] = server_config.getint("DEFAULT",
989
2851
"port")
2852
if server_settings["socket"]:
2853
server_settings["socket"] = server_config.getint("DEFAULT",
2854
"socket")
2855
# Later, stdin will, and stdout and stderr might, be dup'ed
2856
# over with an opened os.devnull. But we don't want this to
2857
# happen with a supplied network socket.
2858
if 0 <= server_settings["socket"] <= 2:
2859
server_settings["socket"] = os.dup(server_settings
2860
["socket"])
990
2861
del server_config
991
2862
992
2863
# Override the settings from the config file with command line
993
2864
# options, if set.
994
2865
for option in ("interface", "address", "port", "debug",
995
"priority", "servicename", "configdir",
996
"use_dbus", "use_ipv6"):
2866
"priority", "servicename", "configdir", "use_dbus",
2867
"use_ipv6", "debuglevel", "restore", "statedir",
2868
"socket", "foreground", "zeroconf"):
997
2869
value = getattr(options, option)
998
2870
if value is not None:
999
2871
server_settings[option] = value
1000
2872
del options
2873
# Force all strings to be unicode
2874
for option in server_settings.keys():
2875
if isinstance(server_settings[option], bytes):
2876
server_settings[option] = (server_settings[option]
2877
.decode("utf-8"))
2878
# Force all boolean options to be boolean
2879
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2880
"foreground", "zeroconf"):
2881
server_settings[option] = bool(server_settings[option])
2882
# Debug implies foreground
2883
if server_settings["debug"]:
2884
server_settings["foreground"] = True
1001
2885
# Now we have our good server settings in "server_settings"
1002
2886
2887
##################################################################
2888
2889
if (not server_settings["zeroconf"]
2890
and not (server_settings["port"]
2891
or server_settings["socket"] != "")):
2892
parser.error("Needs port or socket to work without Zeroconf")
2893
1003
2894
# For convenience
1004
2895
debug = server_settings["debug"]
2896
debuglevel = server_settings["debuglevel"]
1005
2897
use_dbus = server_settings["use_dbus"]
1006
use_dbus = False # XXX: Not done yet
1007
2898
use_ipv6 = server_settings["use_ipv6"]
2899
stored_state_path = os.path.join(server_settings["statedir"],
2900
stored_state_file)
2901
foreground = server_settings["foreground"]
2902
zeroconf = server_settings["zeroconf"]
1008
2903
1009
if not debug:
1010
syslogger.setLevel(logging.WARNING)
1011
console.setLevel(logging.WARNING)
2904
if debug:
2905
initlogger(debug, logging.DEBUG)
2906
else:
2907
if not debuglevel:
2908
initlogger(debug)
2909
else:
2910
level = getattr(logging, debuglevel.upper())
2911
initlogger(debug, level)
1012
2912
1013
2913
if server_settings["servicename"] != "Mandos":
1014
syslogger.setFormatter(logging.Formatter
1015
('Mandos (%s): %%(levelname)s:'
1016
' %%(message)s'
1017
% server_settings["servicename"]))
2914
syslogger.setFormatter(
2915
logging.Formatter('Mandos ({}) [%(process)d]:'
2916
' %(levelname)s: %(message)s'.format(
2917
server_settings["servicename"])))
1018
2918
1019
2919
# Parse config file with clients
1020
client_defaults = { "timeout": "1h",
1021
"interval": "5m",
1022
"checker": "fping -q -- %%(host)s",
1023
"host": "",
1024
}
1025
client_config = ConfigParser.SafeConfigParser(client_defaults)
2920
client_config = configparser.SafeConfigParser(Client
2921
.client_defaults)
1026
2922
client_config.read(os.path.join(server_settings["configdir"],
1027
2923
"clients.conf"))
1028
2924
1029
clients = Set()
1030
tcp_server = IPv6_TCPServer((server_settings["address"],
1031
server_settings["port"]),
1032
TCP_handler,
1033
settings=server_settings,
1034
clients=clients, use_ipv6=use_ipv6)
1035
pidfilename = "/var/run/mandos.pid"
1036
try:
1037
pidfile = open(pidfilename, "w")
1038
except IOError:
1039
logger.error("Could not open file %r", pidfilename)
1040
1041
try:
1042
uid = pwd.getpwnam("_mandos").pw_uid
1043
gid = pwd.getpwnam("_mandos").pw_gid
1044
except KeyError:
1045
try:
1046
uid = pwd.getpwnam("mandos").pw_uid
1047
gid = pwd.getpwnam("mandos").pw_gid
2925
global mandos_dbus_service
2926
mandos_dbus_service = None
2927
2928
socketfd = None
2929
if server_settings["socket"] != "":
2930
socketfd = server_settings["socket"]
2931
tcp_server = MandosServer(
2932
(server_settings["address"], server_settings["port"]),
2933
ClientHandler,
2934
interface=(server_settings["interface"] or None),
2935
use_ipv6=use_ipv6,
2936
gnutls_priority=server_settings["priority"],
2937
use_dbus=use_dbus,
2938
socketfd=socketfd)
2939
if not foreground:
2940
pidfilename = "/run/mandos.pid"
2941
if not os.path.isdir("/run/."):
2942
pidfilename = "/var/run/mandos.pid"
2943
pidfile = None
2944
try:
2945
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
2946
except IOError as e:
2947
logger.error("Could not open file %r", pidfilename,
2948
exc_info=e)
2949
2950
for name, group in (("_mandos", "_mandos"),
2951
("mandos", "mandos"),
2952
("nobody", "nogroup")):
2953
try:
2954
uid = pwd.getpwnam(name).pw_uid
2955
gid = pwd.getpwnam(group).pw_gid
2956
break
1048
2957
except KeyError:
1049
try:
1050
uid = pwd.getpwnam("nobody").pw_uid
1051
gid = pwd.getpwnam("nogroup").pw_gid
1052
except KeyError:
1053
uid = 65534
1054
gid = 65534
2958
continue
2959
else:
2960
uid = 65534
2961
gid = 65534
1055
2962
try:
1056
2963
os.setgid(gid)
1057
2964
os.setuid(uid)
1058
except OSError, error:
1059
if error[0] != errno.EPERM:
1060
raise error
2965
if debug:
2966
logger.debug("Did setuid/setgid to {}:{}".format(uid,
2967
gid))
2968
except OSError as error:
2969
logger.warning("Failed to setuid/setgid to {}:{}: {}"
2970
.format(uid, gid, os.strerror(error.errno)))
2971
if error.errno != errno.EPERM:
2972
raise
1061
2973
1062
# Enable all possible GnuTLS debugging
1063
2974
if debug:
2975
# Enable all possible GnuTLS debugging
2976
1064
2977
# "Use a log level over 10 to enable all debugging options."
1065
2978
# - GnuTLS manual
1066
gnutls.library.functions.gnutls_global_set_log_level(11)
2979
gnutls.global_set_log_level(11)
1067
2980
1068
@gnutls.library.types.gnutls_log_func
2981
@gnutls.log_func
1069
2982
def debug_gnutls(level, string):
1070
2983
logger.debug("GnuTLS: %s", string[:-1])
1071
2984
1072
(gnutls.library.functions
1073
.gnutls_global_set_log_function(debug_gnutls))
1074
1075
global service
1076
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1077
service = AvahiService(name = server_settings["servicename"],
1078
servicetype = "_mandos._tcp",
1079
protocol = protocol)
1080
if server_settings["interface"]:
1081
service.interface = (if_nametoindex
1082
(server_settings["interface"]))
2985
gnutls.global_set_log_function(debug_gnutls)
2986
2987
# Redirect stdin so all checkers get /dev/null
2988
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2989
os.dup2(null, sys.stdin.fileno())
2990
if null > 2:
2991
os.close(null)
2992
2993
# Need to fork before connecting to D-Bus
2994
if not foreground:
2995
# Close all input and output, do double fork, etc.
2996
daemon()
2997
2998
# multiprocessing will use threads, so before we use GObject we
2999
# need to inform GObject that threads will be used.
3000
GObject.threads_init()
1083
3001
1084
3002
global main_loop
1085
global bus
1086
global server
1087
3003
# From the Avahi example code
1088
DBusGMainLoop(set_as_default=True )
1089
main_loop = gobject.MainLoop()
3004
DBusGMainLoop(set_as_default=True)
3005
main_loop = GObject.MainLoop()
1090
3006
bus = dbus.SystemBus()
1091
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
1092
avahi.DBUS_PATH_SERVER),
1093
avahi.DBUS_INTERFACE_SERVER)
1094
3007
# End of Avahi example code
1095
3008
if use_dbus:
1096
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
1097
1098
clients.update(Set(Client(name = section,
1099
config
1100
= dict(client_config.items(section)),
1101
use_dbus = use_dbus)
1102
for section in client_config.sections()))
1103
if not clients:
1104
logger.warning(u"No clients defined")
1105
1106
if debug:
1107
# Redirect stdin so all checkers get /dev/null
1108
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1109
os.dup2(null, sys.stdin.fileno())
1110
if null > 2:
1111
os.close(null)
1112
else:
1113
# No console logging
1114
logger.removeHandler(console)
1115
# Close all input and output, do double fork, etc.
1116
daemon()
1117
1118
try:
1119
pid = os.getpid()
1120
pidfile.write(str(pid) + "\n")
1121
pidfile.close()
3009
try:
3010
bus_name = dbus.service.BusName("se.recompile.Mandos",
3011
bus,
3012
do_not_queue=True)
3013
old_bus_name = dbus.service.BusName(
3014
"se.bsnet.fukt.Mandos", bus,
3015
do_not_queue=True)
3016
except dbus.exceptions.DBusException as e:
3017
logger.error("Disabling D-Bus:", exc_info=e)
3018
use_dbus = False
3019
server_settings["use_dbus"] = False
3020
tcp_server.use_dbus = False
3021
if zeroconf:
3022
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3023
service = AvahiServiceToSyslog(
3024
name = server_settings["servicename"],
3025
servicetype = "_mandos._tcp",
3026
protocol = protocol,
3027
bus = bus)
3028
if server_settings["interface"]:
3029
service.interface = if_nametoindex(
3030
server_settings["interface"].encode("utf-8"))
3031
3032
global multiprocessing_manager
3033
multiprocessing_manager = multiprocessing.Manager()
3034
3035
client_class = Client
3036
if use_dbus:
3037
client_class = functools.partial(ClientDBus, bus = bus)
3038
3039
client_settings = Client.config_parser(client_config)
3040
old_client_settings = {}
3041
clients_data = {}
3042
3043
# This is used to redirect stdout and stderr for checker processes
3044
global wnull
3045
wnull = open(os.devnull, "w") # A writable /dev/null
3046
# Only used if server is running in foreground but not in debug
3047
# mode
3048
if debug or not foreground:
3049
wnull.close()
3050
3051
# Get client data and settings from last running state.
3052
if server_settings["restore"]:
3053
try:
3054
with open(stored_state_path, "rb") as stored_state:
3055
if sys.version_info.major == 2:
3056
clients_data, old_client_settings = pickle.load(
3057
stored_state)
3058
else:
3059
bytes_clients_data, bytes_old_client_settings = (
3060
pickle.load(stored_state, encoding = "bytes"))
3061
### Fix bytes to strings
3062
## clients_data
3063
# .keys()
3064
clients_data = { (key.decode("utf-8")
3065
if isinstance(key, bytes)
3066
else key): value
3067
for key, value in
3068
bytes_clients_data.items() }
3069
del bytes_clients_data
3070
for key in clients_data:
3071
value = { (k.decode("utf-8")
3072
if isinstance(k, bytes) else k): v
3073
for k, v in
3074
clients_data[key].items() }
3075
clients_data[key] = value
3076
# .client_structure
3077
value["client_structure"] = [
3078
(s.decode("utf-8")
3079
if isinstance(s, bytes)
3080
else s) for s in
3081
value["client_structure"] ]
3082
# .name & .host
3083
for k in ("name", "host"):
3084
if isinstance(value[k], bytes):
3085
value[k] = value[k].decode("utf-8")
3086
## old_client_settings
3087
# .keys()
3088
old_client_settings = {
3089
(key.decode("utf-8")
3090
if isinstance(key, bytes)
3091
else key): value
3092
for key, value in
3093
bytes_old_client_settings.items() }
3094
del bytes_old_client_settings
3095
# .host
3096
for value in old_client_settings.values():
3097
if isinstance(value["host"], bytes):
3098
value["host"] = (value["host"]
3099
.decode("utf-8"))
3100
os.remove(stored_state_path)
3101
except IOError as e:
3102
if e.errno == errno.ENOENT:
3103
logger.warning("Could not load persistent state:"
3104
" {}".format(os.strerror(e.errno)))
3105
else:
3106
logger.critical("Could not load persistent state:",
3107
exc_info=e)
3108
raise
3109
except EOFError as e:
3110
logger.warning("Could not load persistent state: "
3111
"EOFError:",
3112
exc_info=e)
3113
3114
with PGPEngine() as pgp:
3115
for client_name, client in clients_data.items():
3116
# Skip removed clients
3117
if client_name not in client_settings:
3118
continue
3119
3120
# Decide which value to use after restoring saved state.
3121
# We have three different values: Old config file,
3122
# new config file, and saved state.
3123
# New config value takes precedence if it differs from old
3124
# config value, otherwise use saved state.
3125
for name, value in client_settings[client_name].items():
3126
try:
3127
# For each value in new config, check if it
3128
# differs from the old config value (Except for
3129
# the "secret" attribute)
3130
if (name != "secret"
3131
and (value !=
3132
old_client_settings[client_name][name])):
3133
client[name] = value
3134
except KeyError:
3135
pass
3136
3137
# Clients who has passed its expire date can still be
3138
# enabled if its last checker was successful. A Client
3139
# whose checker succeeded before we stored its state is
3140
# assumed to have successfully run all checkers during
3141
# downtime.
3142
if client["enabled"]:
3143
if datetime.datetime.utcnow() >= client["expires"]:
3144
if not client["last_checked_ok"]:
3145
logger.warning(
3146
"disabling client {} - Client never "
3147
"performed a successful checker".format(
3148
client_name))
3149
client["enabled"] = False
3150
elif client["last_checker_status"] != 0:
3151
logger.warning(
3152
"disabling client {} - Client last"
3153
" checker failed with error code"
3154
" {}".format(
3155
client_name,
3156
client["last_checker_status"]))
3157
client["enabled"] = False
3158
else:
3159
client["expires"] = (
3160
datetime.datetime.utcnow()
3161
+ client["timeout"])
3162
logger.debug("Last checker succeeded,"
3163
" keeping {} enabled".format(
3164
client_name))
3165
try:
3166
client["secret"] = pgp.decrypt(
3167
client["encrypted_secret"],
3168
client_settings[client_name]["secret"])
3169
except PGPError:
3170
# If decryption fails, we use secret from new settings
3171
logger.debug("Failed to decrypt {} old secret".format(
3172
client_name))
3173
client["secret"] = (client_settings[client_name]
3174
["secret"])
3175
3176
# Add/remove clients based on new changes made to config
3177
for client_name in (set(old_client_settings)
3178
- set(client_settings)):
3179
del clients_data[client_name]
3180
for client_name in (set(client_settings)
3181
- set(old_client_settings)):
3182
clients_data[client_name] = client_settings[client_name]
3183
3184
# Create all client objects
3185
for client_name, client in clients_data.items():
3186
tcp_server.clients[client_name] = client_class(
3187
name = client_name,
3188
settings = client,
3189
server_settings = server_settings)
3190
3191
if not tcp_server.clients:
3192
logger.warning("No clients defined")
3193
3194
if not foreground:
3195
if pidfile is not None:
3196
pid = os.getpid()
3197
try:
3198
with pidfile:
3199
print(pid, file=pidfile)
3200
except IOError:
3201
logger.error("Could not write to file %r with PID %d",
3202
pidfilename, pid)
1122
3203
del pidfile
1123
except IOError:
1124
logger.error(u"Could not write to file %r with PID %d",
1125
pidfilename, pid)
1126
except NameError:
1127
# "pidfile" was never created
1128
pass
1129
del pidfilename
1130
1131
def cleanup():
1132
"Cleanup function; run on exit"
1133
global group
1134
# From the Avahi example code
1135
if not group is None:
1136
group.Free()
1137
group = None
1138
# End of Avahi example code
1139
1140
while clients:
1141
client = clients.pop()
1142
client.disable_hook = None
1143
client.disable()
1144
1145
atexit.register(cleanup)
1146
1147
if not debug:
1148
signal.signal(signal.SIGINT, signal.SIG_IGN)
3204
del pidfilename
3205
1149
3206
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1150
3207
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1151
3208
1152
3209
if use_dbus:
1153
class MandosServer(dbus.service.Object):
3210
3211
@alternate_dbus_interfaces(
3212
{ "se.recompile.Mandos": "se.bsnet.fukt.Mandos" })
3213
class MandosDBusService(DBusObjectWithObjectManager):
1154
3214
"""A D-Bus proxy object"""
3215
1155
3216
def __init__(self):
1156
3217
dbus.service.Object.__init__(self, bus, "/")
1157
_interface = u"se.bsnet.fukt.Mandos"
1158
1159
@dbus.service.signal(_interface, signature="oa{sv}")
1160
def ClientAdded(self, objpath, properties):
1161
"D-Bus signal"
1162
pass
1163
3218
3219
_interface = "se.recompile.Mandos"
3220
3221
@dbus.service.signal(_interface, signature="o")
3222
def ClientAdded(self, objpath):
3223
"D-Bus signal"
3224
pass
3225
3226
@dbus.service.signal(_interface, signature="ss")
3227
def ClientNotFound(self, fingerprint, address):
3228
"D-Bus signal"
3229
pass
3230
3231
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3232
"true"})
1164
3233
@dbus.service.signal(_interface, signature="os")
1165
3234
def ClientRemoved(self, objpath, name):
1166
3235
"D-Bus signal"
1167
3236
pass
1168
3237
3238
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3239
"true"})
1169
3240
@dbus.service.method(_interface, out_signature="ao")
1170
3241
def GetAllClients(self):
1171
3242
"D-Bus method"
1172
return dbus.Array(c.dbus_object_path for c in clients)
3243
return dbus.Array(c.dbus_object_path for c in
3244
tcp_server.clients.values())
1173
3245
1174
@dbus.service.method(_interface, out_signature="a{oa{sv}}")
3246
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3247
"true"})
3248
@dbus.service.method(_interface,
3249
out_signature="a{oa{sv}}")
1175
3250
def GetAllClientsWithProperties(self):
1176
3251
"D-Bus method"
1177
3252
return dbus.Dictionary(
1178
((c.dbus_object_path, c.GetAllProperties())
1179
for c in clients),
3253
{ c.dbus_object_path: c.GetAll(
3254
"se.recompile.Mandos.Client")
3255
for c in tcp_server.clients.values() },
1180
3256
signature="oa{sv}")
1181
3257
1182
3258
@dbus.service.method(_interface, in_signature="o")
1183
3259
def RemoveClient(self, object_path):
1184
3260
"D-Bus method"
1185
for c in clients:
3261
for c in tcp_server.clients.values():
1186
3262
if c.dbus_object_path == object_path:
1187
clients.remove(c)
1188
# Don't signal anything except ClientRemoved
1189
c.use_dbus = False
1190
c.disable()
1191
# Emit D-Bus signal
1192
self.ClientRemoved(object_path, c.name)
3263
del tcp_server.clients[c.name]
3264
c.remove_from_connection()
3265
# Don't signal the disabling
3266
c.disable(quiet=True)
3267
# Emit D-Bus signal for removal
3268
self.client_removed_signal(c)
1193
3269
return
1194
raise KeyError
3270
raise KeyError(object_path)
1195
3271
1196
3272
del _interface
1197
1198
mandos_server = MandosServer()
1199
1200
for client in clients:
3273
3274
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3275
out_signature = "a{oa{sa{sv}}}")
3276
def GetManagedObjects(self):
3277
"""D-Bus method"""
3278
return dbus.Dictionary(
3279
{ client.dbus_object_path:
3280
dbus.Dictionary(
3281
{ interface: client.GetAll(interface)
3282
for interface in
3283
client._get_all_interface_names()})
3284
for client in tcp_server.clients.values()})
3285
3286
def client_added_signal(self, client):
3287
"""Send the new standard signal and the old signal"""
3288
if use_dbus:
3289
# New standard signal
3290
self.InterfacesAdded(
3291
client.dbus_object_path,
3292
dbus.Dictionary(
3293
{ interface: client.GetAll(interface)
3294
for interface in
3295
client._get_all_interface_names()}))
3296
# Old signal
3297
self.ClientAdded(client.dbus_object_path)
3298
3299
def client_removed_signal(self, client):
3300
"""Send the new standard signal and the old signal"""
3301
if use_dbus:
3302
# New standard signal
3303
self.InterfacesRemoved(
3304
client.dbus_object_path,
3305
client._get_all_interface_names())
3306
# Old signal
3307
self.ClientRemoved(client.dbus_object_path,
3308
client.name)
3309
3310
mandos_dbus_service = MandosDBusService()
3311
3312
def cleanup():
3313
"Cleanup function; run on exit"
3314
if zeroconf:
3315
service.cleanup()
3316
3317
multiprocessing.active_children()
3318
wnull.close()
3319
if not (tcp_server.clients or client_settings):
3320
return
3321
3322
# Store client before exiting. Secrets are encrypted with key
3323
# based on what config file has. If config file is
3324
# removed/edited, old secret will thus be unrecovable.
3325
clients = {}
3326
with PGPEngine() as pgp:
3327
for client in tcp_server.clients.values():
3328
key = client_settings[client.name]["secret"]
3329
client.encrypted_secret = pgp.encrypt(client.secret,
3330
key)
3331
client_dict = {}
3332
3333
# A list of attributes that can not be pickled
3334
# + secret.
3335
exclude = { "bus", "changedstate", "secret",
3336
"checker", "server_settings" }
3337
for name, typ in inspect.getmembers(dbus.service
3338
.Object):
3339
exclude.add(name)
3340
3341
client_dict["encrypted_secret"] = (client
3342
.encrypted_secret)
3343
for attr in client.client_structure:
3344
if attr not in exclude:
3345
client_dict[attr] = getattr(client, attr)
3346
3347
clients[client.name] = client_dict
3348
del client_settings[client.name]["secret"]
3349
3350
try:
3351
with tempfile.NamedTemporaryFile(
3352
mode='wb',
3353
suffix=".pickle",
3354
prefix='clients-',
3355
dir=os.path.dirname(stored_state_path),
3356
delete=False) as stored_state:
3357
pickle.dump((clients, client_settings), stored_state,
3358
protocol = 2)
3359
tempname = stored_state.name
3360
os.rename(tempname, stored_state_path)
3361
except (IOError, OSError) as e:
3362
if not debug:
3363
try:
3364
os.remove(tempname)
3365
except NameError:
3366
pass
3367
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
3368
logger.warning("Could not save persistent state: {}"
3369
.format(os.strerror(e.errno)))
3370
else:
3371
logger.warning("Could not save persistent state:",
3372
exc_info=e)
3373
raise
3374
3375
# Delete all clients, and settings from config
3376
while tcp_server.clients:
3377
name, client = tcp_server.clients.popitem()
3378
if use_dbus:
3379
client.remove_from_connection()
3380
# Don't signal the disabling
3381
client.disable(quiet=True)
3382
# Emit D-Bus signal for removal
3383
if use_dbus:
3384
mandos_dbus_service.client_removed_signal(client)
3385
client_settings.clear()
3386
3387
atexit.register(cleanup)
3388
3389
for client in tcp_server.clients.values():
1201
3390
if use_dbus:
1202
# Emit D-Bus signal
1203
mandos_server.ClientAdded(client.dbus_object_path,
1204
client.GetAllProperties())
1205
client.enable()
3391
# Emit D-Bus signal for adding
3392
mandos_dbus_service.client_added_signal(client)
3393
# Need to initiate checking of clients
3394
if client.enabled:
3395
client.init_checker()
1206
3396
1207
3397
tcp_server.enable()
1208
3398
tcp_server.server_activate()
1209
3399
1210
3400
# Find out what port we got
1211
service.port = tcp_server.socket.getsockname()[1]
3401
if zeroconf:
3402
service.port = tcp_server.socket.getsockname()[1]
1212
3403
if use_ipv6:
1213
logger.info(u"Now listening on address %r, port %d,"
1214
" flowinfo %d, scope_id %d"
1215
% tcp_server.socket.getsockname())
3404
logger.info("Now listening on address %r, port %d,"
3405
" flowinfo %d, scope_id %d",
3406
*tcp_server.socket.getsockname())
1216
3407
else: # IPv4
1217
logger.info(u"Now listening on address %r, port %d"
1218
% tcp_server.socket.getsockname())
3408
logger.info("Now listening on address %r, port %d",
3409
*tcp_server.socket.getsockname())
1219
3410
1220
3411
#service.interface = tcp_server.socket.getsockname()[3]
1221
3412
1222
3413
try:
1223
# From the Avahi example code
1224
server.connect_to_signal("StateChanged", server_state_changed)
1225
try:
1226
server_state_changed(server.GetState())
1227
except dbus.exceptions.DBusException, error:
1228
logger.critical(u"DBusException: %s", error)
1229
sys.exit(1)
1230
# End of Avahi example code
3414
if zeroconf:
3415
# From the Avahi example code
3416
try:
3417
service.activate()
3418
except dbus.exceptions.DBusException as error:
3419
logger.critical("D-Bus Exception", exc_info=error)
3420
cleanup()
3421
sys.exit(1)
3422
# End of Avahi example code
1231
3423
1232
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
3424
GObject.io_add_watch(tcp_server.fileno(), GObject.IO_IN,
1233
3425
lambda *args, **kwargs:
1234
3426
(tcp_server.handle_request
1235
3427
(*args[2:], **kwargs) or True))
1236
3428
1237
logger.debug(u"Starting main loop")
3429
logger.debug("Starting main loop")
1238
3430
main_loop.run()
1239
except AvahiError, error:
1240
logger.critical(u"AvahiError: %s", error)
3431
except AvahiError as error:
3432
logger.critical("Avahi Error", exc_info=error)
3433
cleanup()
1241
3434
sys.exit(1)
1242
3435
except KeyboardInterrupt:
1243
3436
if debug:
1244
print >> sys.stderr
3437
print("", file=sys.stderr)
1245
3438
logger.debug("Server received KeyboardInterrupt")
1246
3439
logger.debug("Server exiting")
3440
# Must run before the D-Bus bus name gets deregistered
3441
cleanup()
3442
1247
3443
1248
3444
if __name__ == '__main__':
1249
3445
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0