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- Committer: Teddy Hogeborn
- Date: 2016-03-23 07:11:22 UTC
- mto: (237.7.594 trunk)
- mto: This revision was merged to the branch mainline in revision 343.
- Revision ID: teddy@recompile.se-20160323071122-55srtjdizr21rr7f
Use HTTPS in home page links
Since we have a real certificate now, change all links to the home
page to use HTTPS.
* README: Use HTTPS in home page links
* debian/control (Source: mandos/Homepage): - '' -
* debian/copyright (Source): - '' -
* intro.xml (SEE ALSO): - '' -
* mandos.lsm (Primary-site): - '' -
Since we have a real certificate now, change all links to the home
page to use HTTPS.
* README: Use HTTPS in home page links
* debian/control (Source: mandos/Homepage): - '' -
* debian/copyright (Source): - '' -
* intro.xml (SEE ALSO): - '' -
* mandos.lsm (Primary-site): - '' -
- files added:
- DBUS-API
- debian/source
- debian/upstream
- network-hooks.d
- plugin-helpers
- files removed:
- debian/mandos-client.config
- 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 Teddy Hogeborn
15
# Copyright © 2008 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
from optparse import OptionParser
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
from gi.repository import GLib
65
83
from dbus.mainloop.glib import DBusGMainLoop
66
84
import ctypes
67
85
import ctypes.util
68
69
version = "1.0.2"
70
71
logger = logging.Logger('mandos')
72
syslogger = (logging.handlers.SysLogHandler
73
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
74
address = "/dev/log"))
75
syslogger.setFormatter(logging.Formatter
76
('Mandos: %(levelname)s: %(message)s'))
77
logger.addHandler(syslogger)
78
79
console = logging.StreamHandler()
80
console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
81
' %(message)s'))
82
logger.addHandler(console)
86
import xml.dom.minidom
87
import inspect
88
89
try:
90
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
91
except AttributeError:
92
try:
93
from IN import SO_BINDTODEVICE
94
except ImportError:
95
SO_BINDTODEVICE = None
96
97
if sys.version_info.major == 2:
98
str = unicode
99
100
version = "1.7.7"
101
stored_state_file = "clients.pickle"
102
103
logger = logging.getLogger()
104
syslogger = None
105
106
try:
107
if_nametoindex = ctypes.cdll.LoadLibrary(
108
ctypes.util.find_library("c")).if_nametoindex
109
except (OSError, AttributeError):
110
111
def if_nametoindex(interface):
112
"Get an interface index the hard way, i.e. using fcntl()"
113
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
114
with contextlib.closing(socket.socket()) as s:
115
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
116
struct.pack(b"16s16x", interface))
117
interface_index = struct.unpack("I", ifreq[16:20])[0]
118
return interface_index
119
120
121
def copy_function(func):
122
"""Make a copy of a function"""
123
if sys.version_info.major == 2:
124
return types.FunctionType(func.func_code,
125
func.func_globals,
126
func.func_name,
127
func.func_defaults,
128
func.func_closure)
129
else:
130
return types.FunctionType(func.__code__,
131
func.__globals__,
132
func.__name__,
133
func.__defaults__,
134
func.__closure__)
135
136
137
def initlogger(debug, level=logging.WARNING):
138
"""init logger and add loglevel"""
139
140
global syslogger
141
syslogger = (logging.handlers.SysLogHandler(
142
facility = logging.handlers.SysLogHandler.LOG_DAEMON,
143
address = "/dev/log"))
144
syslogger.setFormatter(logging.Formatter
145
('Mandos [%(process)d]: %(levelname)s:'
146
' %(message)s'))
147
logger.addHandler(syslogger)
148
149
if debug:
150
console = logging.StreamHandler()
151
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
152
' [%(process)d]:'
153
' %(levelname)s:'
154
' %(message)s'))
155
logger.addHandler(console)
156
logger.setLevel(level)
157
158
159
class PGPError(Exception):
160
"""Exception if encryption/decryption fails"""
161
pass
162
163
164
class PGPEngine(object):
165
"""A simple class for OpenPGP symmetric encryption & decryption"""
166
167
def __init__(self):
168
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
169
self.gpg = "gpg"
170
try:
171
output = subprocess.check_output(["gpgconf"])
172
for line in output.splitlines():
173
name, text, path = line.split(b":")
174
if name == "gpg":
175
self.gpg = path
176
break
177
except OSError as e:
178
if e.errno != errno.ENOENT:
179
raise
180
self.gnupgargs = ['--batch',
181
'--homedir', self.tempdir,
182
'--force-mdc',
183
'--quiet',
184
'--no-use-agent']
185
186
def __enter__(self):
187
return self
188
189
def __exit__(self, exc_type, exc_value, traceback):
190
self._cleanup()
191
return False
192
193
def __del__(self):
194
self._cleanup()
195
196
def _cleanup(self):
197
if self.tempdir is not None:
198
# Delete contents of tempdir
199
for root, dirs, files in os.walk(self.tempdir,
200
topdown = False):
201
for filename in files:
202
os.remove(os.path.join(root, filename))
203
for dirname in dirs:
204
os.rmdir(os.path.join(root, dirname))
205
# Remove tempdir
206
os.rmdir(self.tempdir)
207
self.tempdir = None
208
209
def password_encode(self, password):
210
# Passphrase can not be empty and can not contain newlines or
211
# NUL bytes. So we prefix it and hex encode it.
212
encoded = b"mandos" + binascii.hexlify(password)
213
if len(encoded) > 2048:
214
# GnuPG can't handle long passwords, so encode differently
215
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
216
.replace(b"\n", b"\\n")
217
.replace(b"\0", b"\\x00"))
218
return encoded
219
220
def encrypt(self, data, password):
221
passphrase = self.password_encode(password)
222
with tempfile.NamedTemporaryFile(
223
dir=self.tempdir) as passfile:
224
passfile.write(passphrase)
225
passfile.flush()
226
proc = subprocess.Popen([self.gpg, '--symmetric',
227
'--passphrase-file',
228
passfile.name]
229
+ self.gnupgargs,
230
stdin = subprocess.PIPE,
231
stdout = subprocess.PIPE,
232
stderr = subprocess.PIPE)
233
ciphertext, err = proc.communicate(input = data)
234
if proc.returncode != 0:
235
raise PGPError(err)
236
return ciphertext
237
238
def decrypt(self, data, password):
239
passphrase = self.password_encode(password)
240
with tempfile.NamedTemporaryFile(
241
dir = self.tempdir) as passfile:
242
passfile.write(passphrase)
243
passfile.flush()
244
proc = subprocess.Popen([self.gpg, '--decrypt',
245
'--passphrase-file',
246
passfile.name]
247
+ self.gnupgargs,
248
stdin = subprocess.PIPE,
249
stdout = subprocess.PIPE,
250
stderr = subprocess.PIPE)
251
decrypted_plaintext, err = proc.communicate(input = data)
252
if proc.returncode != 0:
253
raise PGPError(err)
254
return decrypted_plaintext
255
256
# Pretend that we have an Avahi module
257
class Avahi(object):
258
"""This isn't so much a class as it is a module-like namespace.
259
It is instantiated once, and simulates having an Avahi module."""
260
IF_UNSPEC = -1 # avahi-common/address.h
261
PROTO_UNSPEC = -1 # avahi-common/address.h
262
PROTO_INET = 0 # avahi-common/address.h
263
PROTO_INET6 = 1 # avahi-common/address.h
264
DBUS_NAME = "org.freedesktop.Avahi"
265
DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"
266
DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"
267
DBUS_PATH_SERVER = "/"
268
def string_array_to_txt_array(self, t):
269
return dbus.Array((dbus.ByteArray(s.encode("utf-8"))
270
for s in t), signature="ay")
271
ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h
272
ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h
273
ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h
274
SERVER_INVALID = 0 # avahi-common/defs.h
275
SERVER_REGISTERING = 1 # avahi-common/defs.h
276
SERVER_RUNNING = 2 # avahi-common/defs.h
277
SERVER_COLLISION = 3 # avahi-common/defs.h
278
SERVER_FAILURE = 4 # avahi-common/defs.h
279
avahi = Avahi()
83
280
84
281
class AvahiError(Exception):
85
def __init__(self, value):
282
def __init__(self, value, *args, **kwargs):
86
283
self.value = value
87
super(AvahiError, self).__init__()
88
def __str__(self):
89
return repr(self.value)
284
return super(AvahiError, self).__init__(value, *args,
285
**kwargs)
286
90
287
91
288
class AvahiServiceError(AvahiError):
92
289
pass
93
290
291
94
292
class AvahiGroupError(AvahiError):
95
293
pass
96
294
97
295
98
296
class AvahiService(object):
99
297
"""An Avahi (Zeroconf) service.
298
100
299
Attributes:
101
300
interface: integer; avahi.IF_UNSPEC or an interface index.
102
301
Used to optionally bind to the specified interface.
103
302
name: string; Example: 'Mandos'
104
303
type: string; Example: '_mandos._tcp'.
105
See <http://www.dns-sd.org/ServiceTypes.html>
304
See <https://www.iana.org/assignments/service-names-port-numbers>
106
305
port: integer; what port to announce
107
306
TXT: list of strings; TXT record for the service
108
307
domain: string; Domain to publish on, default to .local if empty.
110
309
max_renames: integer; maximum number of renames
111
310
rename_count: integer; counter so we only rename after collisions
112
311
a sensible number of times
312
group: D-Bus Entry Group
313
server: D-Bus Server
314
bus: dbus.SystemBus()
113
315
"""
114
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
115
servicetype = None, port = None, TXT = None,
116
domain = "", host = "", max_renames = 32768):
316
317
def __init__(self,
318
interface = avahi.IF_UNSPEC,
319
name = None,
320
servicetype = None,
321
port = None,
322
TXT = None,
323
domain = "",
324
host = "",
325
max_renames = 32768,
326
protocol = avahi.PROTO_UNSPEC,
327
bus = None):
117
328
self.interface = interface
118
329
self.name = name
119
330
self.type = servicetype
123
334
self.host = host
124
335
self.rename_count = 0
125
336
self.max_renames = max_renames
126
def rename(self):
337
self.protocol = protocol
338
self.group = None # our entry group
339
self.server = None
340
self.bus = bus
341
self.entry_group_state_changed_match = None
342
343
def rename(self, remove=True):
127
344
"""Derived from the Avahi example code"""
128
345
if self.rename_count >= self.max_renames:
129
logger.critical(u"No suitable Zeroconf service name found"
130
u" after %i retries, exiting.",
346
logger.critical("No suitable Zeroconf service name found"
347
" after %i retries, exiting.",
131
348
self.rename_count)
132
349
raise AvahiServiceError("Too many renames")
133
self.name = server.GetAlternativeServiceName(self.name)
134
logger.info(u"Changing Zeroconf service name to %r ...",
135
str(self.name))
136
syslogger.setFormatter(logging.Formatter
137
('Mandos (%s): %%(levelname)s:'
138
' %%(message)s' % self.name))
139
self.remove()
140
self.add()
350
self.name = str(
351
self.server.GetAlternativeServiceName(self.name))
141
352
self.rename_count += 1
353
logger.info("Changing Zeroconf service name to %r ...",
354
self.name)
355
if remove:
356
self.remove()
357
try:
358
self.add()
359
except dbus.exceptions.DBusException as error:
360
if (error.get_dbus_name()
361
== "org.freedesktop.Avahi.CollisionError"):
362
logger.info("Local Zeroconf service name collision.")
363
return self.rename(remove=False)
364
else:
365
logger.critical("D-Bus Exception", exc_info=error)
366
self.cleanup()
367
os._exit(1)
368
142
369
def remove(self):
143
370
"""Derived from the Avahi example code"""
144
if group is not None:
145
group.Reset()
371
if self.entry_group_state_changed_match is not None:
372
self.entry_group_state_changed_match.remove()
373
self.entry_group_state_changed_match = None
374
if self.group is not None:
375
self.group.Reset()
376
146
377
def add(self):
147
378
"""Derived from the Avahi example code"""
148
global group
149
if group is None:
150
group = dbus.Interface(bus.get_object
151
(avahi.DBUS_NAME,
152
server.EntryGroupNew()),
153
avahi.DBUS_INTERFACE_ENTRY_GROUP)
154
group.connect_to_signal('StateChanged',
155
entry_group_state_changed)
156
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
157
service.name, service.type)
158
group.AddService(
159
self.interface, # interface
160
avahi.PROTO_INET6, # protocol
161
dbus.UInt32(0), # flags
162
self.name, self.type,
163
self.domain, self.host,
164
dbus.UInt16(self.port),
165
avahi.string_array_to_txt_array(self.TXT))
166
group.Commit()
167
168
# From the Avahi example code:
169
group = None # our entry group
170
# End of Avahi example code
171
172
173
def _datetime_to_dbus_struct(dt, variant_level=0):
174
"""Convert a UTC datetime.datetime() to a D-Bus struct.
175
The format is special to this application, since we could not find
176
any other standard way."""
177
return dbus.Struct((dbus.Int16(dt.year),
178
dbus.Byte(dt.month),
179
dbus.Byte(dt.day),
180
dbus.Byte(dt.hour),
181
dbus.Byte(dt.minute),
182
dbus.Byte(dt.second),
183
dbus.UInt32(dt.microsecond)),
184
signature="nyyyyyu",
185
variant_level=variant_level)
186
187
188
class Client(dbus.service.Object):
379
self.remove()
380
if self.group is None:
381
self.group = dbus.Interface(
382
self.bus.get_object(avahi.DBUS_NAME,
383
self.server.EntryGroupNew()),
384
avahi.DBUS_INTERFACE_ENTRY_GROUP)
385
self.entry_group_state_changed_match = (
386
self.group.connect_to_signal(
387
'StateChanged', self.entry_group_state_changed))
388
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
389
self.name, self.type)
390
self.group.AddService(
391
self.interface,
392
self.protocol,
393
dbus.UInt32(0), # flags
394
self.name, self.type,
395
self.domain, self.host,
396
dbus.UInt16(self.port),
397
avahi.string_array_to_txt_array(self.TXT))
398
self.group.Commit()
399
400
def entry_group_state_changed(self, state, error):
401
"""Derived from the Avahi example code"""
402
logger.debug("Avahi entry group state change: %i", state)
403
404
if state == avahi.ENTRY_GROUP_ESTABLISHED:
405
logger.debug("Zeroconf service established.")
406
elif state == avahi.ENTRY_GROUP_COLLISION:
407
logger.info("Zeroconf service name collision.")
408
self.rename()
409
elif state == avahi.ENTRY_GROUP_FAILURE:
410
logger.critical("Avahi: Error in group state changed %s",
411
str(error))
412
raise AvahiGroupError("State changed: {!s}".format(error))
413
414
def cleanup(self):
415
"""Derived from the Avahi example code"""
416
if self.group is not None:
417
try:
418
self.group.Free()
419
except (dbus.exceptions.UnknownMethodException,
420
dbus.exceptions.DBusException):
421
pass
422
self.group = None
423
self.remove()
424
425
def server_state_changed(self, state, error=None):
426
"""Derived from the Avahi example code"""
427
logger.debug("Avahi server state change: %i", state)
428
bad_states = {
429
avahi.SERVER_INVALID: "Zeroconf server invalid",
430
avahi.SERVER_REGISTERING: None,
431
avahi.SERVER_COLLISION: "Zeroconf server name collision",
432
avahi.SERVER_FAILURE: "Zeroconf server failure",
433
}
434
if state in bad_states:
435
if bad_states[state] is not None:
436
if error is None:
437
logger.error(bad_states[state])
438
else:
439
logger.error(bad_states[state] + ": %r", error)
440
self.cleanup()
441
elif state == avahi.SERVER_RUNNING:
442
try:
443
self.add()
444
except dbus.exceptions.DBusException as error:
445
if (error.get_dbus_name()
446
== "org.freedesktop.Avahi.CollisionError"):
447
logger.info("Local Zeroconf service name"
448
" collision.")
449
return self.rename(remove=False)
450
else:
451
logger.critical("D-Bus Exception", exc_info=error)
452
self.cleanup()
453
os._exit(1)
454
else:
455
if error is None:
456
logger.debug("Unknown state: %r", state)
457
else:
458
logger.debug("Unknown state: %r: %r", state, error)
459
460
def activate(self):
461
"""Derived from the Avahi example code"""
462
if self.server is None:
463
self.server = dbus.Interface(
464
self.bus.get_object(avahi.DBUS_NAME,
465
avahi.DBUS_PATH_SERVER,
466
follow_name_owner_changes=True),
467
avahi.DBUS_INTERFACE_SERVER)
468
self.server.connect_to_signal("StateChanged",
469
self.server_state_changed)
470
self.server_state_changed(self.server.GetState())
471
472
473
class AvahiServiceToSyslog(AvahiService):
474
def rename(self, *args, **kwargs):
475
"""Add the new name to the syslog messages"""
476
ret = AvahiService.rename(self, *args, **kwargs)
477
syslogger.setFormatter(logging.Formatter(
478
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
479
.format(self.name)))
480
return ret
481
482
# Pretend that we have a GnuTLS module
483
class GnuTLS(object):
484
"""This isn't so much a class as it is a module-like namespace.
485
It is instantiated once, and simulates having a GnuTLS module."""
486
487
_library = ctypes.cdll.LoadLibrary(
488
ctypes.util.find_library("gnutls"))
489
_need_version = b"3.3.0"
490
def __init__(self):
491
# Need to use class name "GnuTLS" here, since this method is
492
# called before the assignment to the "gnutls" global variable
493
# happens.
494
if GnuTLS.check_version(self._need_version) is None:
495
raise GnuTLS.Error("Needs GnuTLS {} or later"
496
.format(self._need_version))
497
498
# Unless otherwise indicated, the constants and types below are
499
# all from the gnutls/gnutls.h C header file.
500
501
# Constants
502
E_SUCCESS = 0
503
E_INTERRUPTED = -52
504
E_AGAIN = -28
505
CRT_OPENPGP = 2
506
CLIENT = 2
507
SHUT_RDWR = 0
508
CRD_CERTIFICATE = 1
509
E_NO_CERTIFICATE_FOUND = -49
510
OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h
511
512
# Types
513
class session_int(ctypes.Structure):
514
_fields_ = []
515
session_t = ctypes.POINTER(session_int)
516
class certificate_credentials_st(ctypes.Structure):
517
_fields_ = []
518
certificate_credentials_t = ctypes.POINTER(
519
certificate_credentials_st)
520
certificate_type_t = ctypes.c_int
521
class datum_t(ctypes.Structure):
522
_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
523
('size', ctypes.c_uint)]
524
class openpgp_crt_int(ctypes.Structure):
525
_fields_ = []
526
openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
527
openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
528
log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
529
credentials_type_t = ctypes.c_int
530
transport_ptr_t = ctypes.c_void_p
531
close_request_t = ctypes.c_int
532
533
# Exceptions
534
class Error(Exception):
535
# We need to use the class name "GnuTLS" here, since this
536
# exception might be raised from within GnuTLS.__init__,
537
# which is called before the assignment to the "gnutls"
538
# global variable has happened.
539
def __init__(self, message = None, code = None, args=()):
540
# Default usage is by a message string, but if a return
541
# code is passed, convert it to a string with
542
# gnutls.strerror()
543
self.code = code
544
if message is None and code is not None:
545
message = GnuTLS.strerror(code)
546
return super(GnuTLS.Error, self).__init__(
547
message, *args)
548
549
class CertificateSecurityError(Error):
550
pass
551
552
# Classes
553
class Credentials(object):
554
def __init__(self):
555
self._c_object = gnutls.certificate_credentials_t()
556
gnutls.certificate_allocate_credentials(
557
ctypes.byref(self._c_object))
558
self.type = gnutls.CRD_CERTIFICATE
559
560
def __del__(self):
561
gnutls.certificate_free_credentials(self._c_object)
562
563
class ClientSession(object):
564
def __init__(self, socket, credentials = None):
565
self._c_object = gnutls.session_t()
566
gnutls.init(ctypes.byref(self._c_object), gnutls.CLIENT)
567
gnutls.set_default_priority(self._c_object)
568
gnutls.transport_set_ptr(self._c_object, socket.fileno())
569
gnutls.handshake_set_private_extensions(self._c_object,
570
True)
571
self.socket = socket
572
if credentials is None:
573
credentials = gnutls.Credentials()
574
gnutls.credentials_set(self._c_object, credentials.type,
575
ctypes.cast(credentials._c_object,
576
ctypes.c_void_p))
577
self.credentials = credentials
578
579
def __del__(self):
580
gnutls.deinit(self._c_object)
581
582
def handshake(self):
583
return gnutls.handshake(self._c_object)
584
585
def send(self, data):
586
data = bytes(data)
587
data_len = len(data)
588
while data_len > 0:
589
data_len -= gnutls.record_send(self._c_object,
590
data[-data_len:],
591
data_len)
592
593
def bye(self):
594
return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
595
596
# Error handling functions
597
def _error_code(result):
598
"""A function to raise exceptions on errors, suitable
599
for the 'restype' attribute on ctypes functions"""
600
if result >= 0:
601
return result
602
if result == gnutls.E_NO_CERTIFICATE_FOUND:
603
raise gnutls.CertificateSecurityError(code = result)
604
raise gnutls.Error(code = result)
605
606
def _retry_on_error(result, func, arguments):
607
"""A function to retry on some errors, suitable
608
for the 'errcheck' attribute on ctypes functions"""
609
while result < 0:
610
if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
611
return _error_code(result)
612
result = func(*arguments)
613
return result
614
615
# Unless otherwise indicated, the function declarations below are
616
# all from the gnutls/gnutls.h C header file.
617
618
# Functions
619
priority_set_direct = _library.gnutls_priority_set_direct
620
priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
621
ctypes.POINTER(ctypes.c_char_p)]
622
priority_set_direct.restype = _error_code
623
624
init = _library.gnutls_init
625
init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
626
init.restype = _error_code
627
628
set_default_priority = _library.gnutls_set_default_priority
629
set_default_priority.argtypes = [session_t]
630
set_default_priority.restype = _error_code
631
632
record_send = _library.gnutls_record_send
633
record_send.argtypes = [session_t, ctypes.c_void_p,
634
ctypes.c_size_t]
635
record_send.restype = ctypes.c_ssize_t
636
record_send.errcheck = _retry_on_error
637
638
certificate_allocate_credentials = (
639
_library.gnutls_certificate_allocate_credentials)
640
certificate_allocate_credentials.argtypes = [
641
ctypes.POINTER(certificate_credentials_t)]
642
certificate_allocate_credentials.restype = _error_code
643
644
certificate_free_credentials = (
645
_library.gnutls_certificate_free_credentials)
646
certificate_free_credentials.argtypes = [certificate_credentials_t]
647
certificate_free_credentials.restype = None
648
649
handshake_set_private_extensions = (
650
_library.gnutls_handshake_set_private_extensions)
651
handshake_set_private_extensions.argtypes = [session_t,
652
ctypes.c_int]
653
handshake_set_private_extensions.restype = None
654
655
credentials_set = _library.gnutls_credentials_set
656
credentials_set.argtypes = [session_t, credentials_type_t,
657
ctypes.c_void_p]
658
credentials_set.restype = _error_code
659
660
strerror = _library.gnutls_strerror
661
strerror.argtypes = [ctypes.c_int]
662
strerror.restype = ctypes.c_char_p
663
664
certificate_type_get = _library.gnutls_certificate_type_get
665
certificate_type_get.argtypes = [session_t]
666
certificate_type_get.restype = _error_code
667
668
certificate_get_peers = _library.gnutls_certificate_get_peers
669
certificate_get_peers.argtypes = [session_t,
670
ctypes.POINTER(ctypes.c_uint)]
671
certificate_get_peers.restype = ctypes.POINTER(datum_t)
672
673
global_set_log_level = _library.gnutls_global_set_log_level
674
global_set_log_level.argtypes = [ctypes.c_int]
675
global_set_log_level.restype = None
676
677
global_set_log_function = _library.gnutls_global_set_log_function
678
global_set_log_function.argtypes = [log_func]
679
global_set_log_function.restype = None
680
681
deinit = _library.gnutls_deinit
682
deinit.argtypes = [session_t]
683
deinit.restype = None
684
685
handshake = _library.gnutls_handshake
686
handshake.argtypes = [session_t]
687
handshake.restype = _error_code
688
handshake.errcheck = _retry_on_error
689
690
transport_set_ptr = _library.gnutls_transport_set_ptr
691
transport_set_ptr.argtypes = [session_t, transport_ptr_t]
692
transport_set_ptr.restype = None
693
694
bye = _library.gnutls_bye
695
bye.argtypes = [session_t, close_request_t]
696
bye.restype = _error_code
697
bye.errcheck = _retry_on_error
698
699
check_version = _library.gnutls_check_version
700
check_version.argtypes = [ctypes.c_char_p]
701
check_version.restype = ctypes.c_char_p
702
703
# All the function declarations below are from gnutls/openpgp.h
704
705
openpgp_crt_init = _library.gnutls_openpgp_crt_init
706
openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
707
openpgp_crt_init.restype = _error_code
708
709
openpgp_crt_import = _library.gnutls_openpgp_crt_import
710
openpgp_crt_import.argtypes = [openpgp_crt_t,
711
ctypes.POINTER(datum_t),
712
openpgp_crt_fmt_t]
713
openpgp_crt_import.restype = _error_code
714
715
openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
716
openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
717
ctypes.POINTER(ctypes.c_uint)]
718
openpgp_crt_verify_self.restype = _error_code
719
720
openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
721
openpgp_crt_deinit.argtypes = [openpgp_crt_t]
722
openpgp_crt_deinit.restype = None
723
724
openpgp_crt_get_fingerprint = (
725
_library.gnutls_openpgp_crt_get_fingerprint)
726
openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
727
ctypes.c_void_p,
728
ctypes.POINTER(
729
ctypes.c_size_t)]
730
openpgp_crt_get_fingerprint.restype = _error_code
731
732
# Remove non-public functions
733
del _error_code, _retry_on_error
734
# Create the global "gnutls" object, simulating a module
735
gnutls = GnuTLS()
736
737
def call_pipe(connection, # : multiprocessing.Connection
738
func, *args, **kwargs):
739
"""This function is meant to be called by multiprocessing.Process
740
741
This function runs func(*args, **kwargs), and writes the resulting
742
return value on the provided multiprocessing.Connection.
743
"""
744
connection.send(func(*args, **kwargs))
745
connection.close()
746
747
class Client(object):
189
748
"""A representation of a client host served by this server.
749
190
750
Attributes:
191
name: string; from the config file, used in log messages
751
approved: bool(); 'None' if not yet approved/disapproved
752
approval_delay: datetime.timedelta(); Time to wait for approval
753
approval_duration: datetime.timedelta(); Duration of one approval
754
checker: subprocess.Popen(); a running checker process used
755
to see if the client lives.
756
'None' if no process is running.
757
checker_callback_tag: a GLib event source tag, or None
758
checker_command: string; External command which is run to check
759
if client lives. %() expansions are done at
760
runtime with vars(self) as dict, so that for
761
instance %(name)s can be used in the command.
762
checker_initiator_tag: a GLib event source tag, or None
763
created: datetime.datetime(); (UTC) object creation
764
client_structure: Object describing what attributes a client has
765
and is used for storing the client at exit
766
current_checker_command: string; current running checker_command
767
disable_initiator_tag: a GLib event source tag, or None
768
enabled: bool()
192
769
fingerprint: string (40 or 32 hexadecimal digits); used to
193
770
uniquely identify the client
194
secret: bytestring; sent verbatim (over TLS) to client
195
771
host: string; available for use by the checker command
196
created: datetime.datetime(); (UTC) object creation
197
last_started: datetime.datetime(); (UTC)
198
started: bool()
772
interval: datetime.timedelta(); How often to start a new checker
773
last_approval_request: datetime.datetime(); (UTC) or None
199
774
last_checked_ok: datetime.datetime(); (UTC) or None
775
last_checker_status: integer between 0 and 255 reflecting exit
776
status of last checker. -1 reflects crashed
777
checker, -2 means no checker completed yet.
778
last_checker_signal: The signal which killed the last checker, if
779
last_checker_status is -1
780
last_enabled: datetime.datetime(); (UTC) or None
781
name: string; from the config file, used in log messages and
782
D-Bus identifiers
783
secret: bytestring; sent verbatim (over TLS) to client
200
784
timeout: datetime.timedelta(); How long from last_checked_ok
201
until this client is invalid
202
interval: datetime.timedelta(); How often to start a new checker
203
stop_hook: If set, called by stop() as stop_hook(self)
204
checker: subprocess.Popen(); a running checker process used
205
to see if the client lives.
206
'None' if no process is running.
207
checker_initiator_tag: a gobject event source tag, or None
208
stop_initiator_tag: - '' -
209
checker_callback_tag: - '' -
210
checker_command: string; External command which is run to check if
211
client lives. %() expansions are done at
212
runtime with vars(self) as dict, so that for
213
instance %(name)s can be used in the command.
214
dbus_object_path: dbus.ObjectPath
215
Private attibutes:
216
_timeout: Real variable for 'timeout'
217
_interval: Real variable for 'interval'
218
_timeout_milliseconds: Used when calling gobject.timeout_add()
219
_interval_milliseconds: - '' -
785
until this client is disabled
786
extended_timeout: extra long timeout when secret has been sent
787
runtime_expansions: Allowed attributes for runtime expansion.
788
expires: datetime.datetime(); time (UTC) when a client will be
789
disabled, or None
790
server_settings: The server_settings dict from main()
220
791
"""
221
def _set_timeout(self, timeout):
222
"Setter function for the 'timeout' attribute"
223
self._timeout = timeout
224
self._timeout_milliseconds = ((self.timeout.days
225
* 24 * 60 * 60 * 1000)
226
+ (self.timeout.seconds * 1000)
227
+ (self.timeout.microseconds
228
// 1000))
229
# Emit D-Bus signal
230
self.PropertyChanged(dbus.String(u"timeout"),
231
(dbus.UInt64(self._timeout_milliseconds,
232
variant_level=1)))
233
timeout = property(lambda self: self._timeout, _set_timeout)
234
del _set_timeout
235
236
def _set_interval(self, interval):
237
"Setter function for the 'interval' attribute"
238
self._interval = interval
239
self._interval_milliseconds = ((self.interval.days
240
* 24 * 60 * 60 * 1000)
241
+ (self.interval.seconds
242
* 1000)
243
+ (self.interval.microseconds
244
// 1000))
245
# Emit D-Bus signal
246
self.PropertyChanged(dbus.String(u"interval"),
247
(dbus.UInt64(self._interval_milliseconds,
248
variant_level=1)))
249
interval = property(lambda self: self._interval, _set_interval)
250
del _set_interval
251
252
def __init__(self, name = None, stop_hook=None, config=None):
253
"""Note: the 'checker' key in 'config' sets the
254
'checker_command' attribute and *not* the 'checker'
255
attribute."""
256
self.dbus_object_path = (dbus.ObjectPath
257
("/Mandos/clients/"
258
+ name.replace(".", "_")))
259
dbus.service.Object.__init__(self, bus,
260
self.dbus_object_path)
261
if config is None:
262
config = {}
792
793
runtime_expansions = ("approval_delay", "approval_duration",
794
"created", "enabled", "expires",
795
"fingerprint", "host", "interval",
796
"last_approval_request", "last_checked_ok",
797
"last_enabled", "name", "timeout")
798
client_defaults = {
799
"timeout": "PT5M",
800
"extended_timeout": "PT15M",
801
"interval": "PT2M",
802
"checker": "fping -q -- %%(host)s",
803
"host": "",
804
"approval_delay": "PT0S",
805
"approval_duration": "PT1S",
806
"approved_by_default": "True",
807
"enabled": "True",
808
}
809
810
@staticmethod
811
def config_parser(config):
812
"""Construct a new dict of client settings of this form:
813
{ client_name: {setting_name: value, ...}, ...}
814
with exceptions for any special settings as defined above.
815
NOTE: Must be a pure function. Must return the same result
816
value given the same arguments.
817
"""
818
settings = {}
819
for client_name in config.sections():
820
section = dict(config.items(client_name))
821
client = settings[client_name] = {}
822
823
client["host"] = section["host"]
824
# Reformat values from string types to Python types
825
client["approved_by_default"] = config.getboolean(
826
client_name, "approved_by_default")
827
client["enabled"] = config.getboolean(client_name,
828
"enabled")
829
830
# Uppercase and remove spaces from fingerprint for later
831
# comparison purposes with return value from the
832
# fingerprint() function
833
client["fingerprint"] = (section["fingerprint"].upper()
834
.replace(" ", ""))
835
if "secret" in section:
836
client["secret"] = codecs.decode(section["secret"]
837
.encode("utf-8"),
838
"base64")
839
elif "secfile" in section:
840
with open(os.path.expanduser(os.path.expandvars
841
(section["secfile"])),
842
"rb") as secfile:
843
client["secret"] = secfile.read()
844
else:
845
raise TypeError("No secret or secfile for section {}"
846
.format(section))
847
client["timeout"] = string_to_delta(section["timeout"])
848
client["extended_timeout"] = string_to_delta(
849
section["extended_timeout"])
850
client["interval"] = string_to_delta(section["interval"])
851
client["approval_delay"] = string_to_delta(
852
section["approval_delay"])
853
client["approval_duration"] = string_to_delta(
854
section["approval_duration"])
855
client["checker_command"] = section["checker"]
856
client["last_approval_request"] = None
857
client["last_checked_ok"] = None
858
client["last_checker_status"] = -2
859
860
return settings
861
862
def __init__(self, settings, name = None, server_settings=None):
263
863
self.name = name
264
logger.debug(u"Creating client %r", self.name)
265
# Uppercase and remove spaces from fingerprint for later
266
# comparison purposes with return value from the fingerprint()
267
# function
268
self.fingerprint = (config["fingerprint"].upper()
269
.replace(u" ", u""))
270
logger.debug(u" Fingerprint: %s", self.fingerprint)
271
if "secret" in config:
272
self.secret = config["secret"].decode(u"base64")
273
elif "secfile" in config:
274
with closing(open(os.path.expanduser
275
(os.path.expandvars
276
(config["secfile"])))) as secfile:
277
self.secret = secfile.read()
864
if server_settings is None:
865
server_settings = {}
866
self.server_settings = server_settings
867
# adding all client settings
868
for setting, value in settings.items():
869
setattr(self, setting, value)
870
871
if self.enabled:
872
if not hasattr(self, "last_enabled"):
873
self.last_enabled = datetime.datetime.utcnow()
874
if not hasattr(self, "expires"):
875
self.expires = (datetime.datetime.utcnow()
876
+ self.timeout)
278
877
else:
279
raise TypeError(u"No secret or secfile for client %s"
280
% self.name)
281
self.host = config.get("host", "")
282
self.created = datetime.datetime.utcnow()
283
self.started = False
284
self.last_started = None
285
self.last_checked_ok = None
286
self.timeout = string_to_delta(config["timeout"])
287
self.interval = string_to_delta(config["interval"])
288
self.stop_hook = stop_hook
878
self.last_enabled = None
879
self.expires = None
880
881
logger.debug("Creating client %r", self.name)
882
logger.debug(" Fingerprint: %s", self.fingerprint)
883
self.created = settings.get("created",
884
datetime.datetime.utcnow())
885
886
# attributes specific for this server instance
289
887
self.checker = None
290
888
self.checker_initiator_tag = None
291
self.stop_initiator_tag = None
889
self.disable_initiator_tag = None
292
890
self.checker_callback_tag = None
293
self.checker_command = config["checker"]
294
295
def start(self):
891
self.current_checker_command = None
892
self.approved = None
893
self.approvals_pending = 0
894
self.changedstate = multiprocessing_manager.Condition(
895
multiprocessing_manager.Lock())
896
self.client_structure = [attr
897
for attr in self.__dict__.keys()
898
if not attr.startswith("_")]
899
self.client_structure.append("client_structure")
900
901
for name, t in inspect.getmembers(
902
type(self), lambda obj: isinstance(obj, property)):
903
if not name.startswith("_"):
904
self.client_structure.append(name)
905
906
# Send notice to process children that client state has changed
907
def send_changedstate(self):
908
with self.changedstate:
909
self.changedstate.notify_all()
910
911
def enable(self):
296
912
"""Start this client's checker and timeout hooks"""
297
self.last_started = datetime.datetime.utcnow()
913
if getattr(self, "enabled", False):
914
# Already enabled
915
return
916
self.expires = datetime.datetime.utcnow() + self.timeout
917
self.enabled = True
918
self.last_enabled = datetime.datetime.utcnow()
919
self.init_checker()
920
self.send_changedstate()
921
922
def disable(self, quiet=True):
923
"""Disable this client."""
924
if not getattr(self, "enabled", False):
925
return False
926
if not quiet:
927
logger.info("Disabling client %s", self.name)
928
if getattr(self, "disable_initiator_tag", None) is not None:
929
GLib.source_remove(self.disable_initiator_tag)
930
self.disable_initiator_tag = None
931
self.expires = None
932
if getattr(self, "checker_initiator_tag", None) is not None:
933
GLib.source_remove(self.checker_initiator_tag)
934
self.checker_initiator_tag = None
935
self.stop_checker()
936
self.enabled = False
937
if not quiet:
938
self.send_changedstate()
939
# Do not run this again if called by a GLib.timeout_add
940
return False
941
942
def __del__(self):
943
self.disable()
944
945
def init_checker(self):
298
946
# Schedule a new checker to be started an 'interval' from now,
299
947
# and every interval from then on.
300
self.checker_initiator_tag = (gobject.timeout_add
301
(self._interval_milliseconds,
302
self.start_checker))
948
if self.checker_initiator_tag is not None:
949
GLib.source_remove(self.checker_initiator_tag)
950
self.checker_initiator_tag = GLib.timeout_add(
951
int(self.interval.total_seconds() * 1000),
952
self.start_checker)
953
# Schedule a disable() when 'timeout' has passed
954
if self.disable_initiator_tag is not None:
955
GLib.source_remove(self.disable_initiator_tag)
956
self.disable_initiator_tag = GLib.timeout_add(
957
int(self.timeout.total_seconds() * 1000), self.disable)
303
958
# Also start a new checker *right now*.
304
959
self.start_checker()
305
# Schedule a stop() when 'timeout' has passed
306
self.stop_initiator_tag = (gobject.timeout_add
307
(self._timeout_milliseconds,
308
self.stop))
309
self.started = True
310
# Emit D-Bus signal
311
self.PropertyChanged(dbus.String(u"started"),
312
dbus.Boolean(True, variant_level=1))
313
self.PropertyChanged(dbus.String(u"last_started"),
314
(_datetime_to_dbus_struct
315
(self.last_started, variant_level=1)))
316
317
def stop(self):
318
"""Stop this client."""
319
if not getattr(self, "started", False):
320
return False
321
logger.info(u"Stopping client %s", self.name)
322
if getattr(self, "stop_initiator_tag", False):
323
gobject.source_remove(self.stop_initiator_tag)
324
self.stop_initiator_tag = None
325
if getattr(self, "checker_initiator_tag", False):
326
gobject.source_remove(self.checker_initiator_tag)
327
self.checker_initiator_tag = None
328
self.stop_checker()
329
if self.stop_hook:
330
self.stop_hook(self)
331
self.started = False
332
# Emit D-Bus signal
333
self.PropertyChanged(dbus.String(u"started"),
334
dbus.Boolean(False, variant_level=1))
335
# Do not run this again if called by a gobject.timeout_add
336
return False
337
338
def __del__(self):
339
self.stop_hook = None
340
self.stop()
341
342
def checker_callback(self, pid, condition, command):
960
961
def checker_callback(self, source, condition, connection,
962
command):
343
963
"""The checker has completed, so take appropriate actions."""
344
964
self.checker_callback_tag = None
345
965
self.checker = None
346
# Emit D-Bus signal
347
self.PropertyChanged(dbus.String(u"checker_running"),
348
dbus.Boolean(False, variant_level=1))
349
if (os.WIFEXITED(condition)
350
and (os.WEXITSTATUS(condition) == 0)):
351
logger.info(u"Checker for %(name)s succeeded",
352
vars(self))
353
# Emit D-Bus signal
354
self.CheckerCompleted(dbus.Boolean(True),
355
dbus.UInt16(condition),
356
dbus.String(command))
357
self.bump_timeout()
358
elif not os.WIFEXITED(condition):
359
logger.warning(u"Checker for %(name)s crashed?",
966
# Read return code from connection (see call_pipe)
967
returncode = connection.recv()
968
connection.close()
969
970
if returncode >= 0:
971
self.last_checker_status = returncode
972
self.last_checker_signal = None
973
if self.last_checker_status == 0:
974
logger.info("Checker for %(name)s succeeded",
975
vars(self))
976
self.checked_ok()
977
else:
978
logger.info("Checker for %(name)s failed", vars(self))
979
else:
980
self.last_checker_status = -1
981
self.last_checker_signal = -returncode
982
logger.warning("Checker for %(name)s crashed?",
360
983
vars(self))
361
# Emit D-Bus signal
362
self.CheckerCompleted(dbus.Boolean(False),
363
dbus.UInt16(condition),
364
dbus.String(command))
365
else:
366
logger.info(u"Checker for %(name)s failed",
367
vars(self))
368
# Emit D-Bus signal
369
self.CheckerCompleted(dbus.Boolean(False),
370
dbus.UInt16(condition),
371
dbus.String(command))
984
return False
372
985
373
def bump_timeout(self):
374
"""Bump up the timeout for this client.
375
This should only be called when the client has been seen,
376
alive and well.
377
"""
986
def checked_ok(self):
987
"""Assert that the client has been seen, alive and well."""
378
988
self.last_checked_ok = datetime.datetime.utcnow()
379
gobject.source_remove(self.stop_initiator_tag)
380
self.stop_initiator_tag = (gobject.timeout_add
381
(self._timeout_milliseconds,
382
self.stop))
383
self.PropertyChanged(dbus.String(u"last_checked_ok"),
384
(_datetime_to_dbus_struct
385
(self.last_checked_ok,
386
variant_level=1)))
989
self.last_checker_status = 0
990
self.last_checker_signal = None
991
self.bump_timeout()
992
993
def bump_timeout(self, timeout=None):
994
"""Bump up the timeout for this client."""
995
if timeout is None:
996
timeout = self.timeout
997
if self.disable_initiator_tag is not None:
998
GLib.source_remove(self.disable_initiator_tag)
999
self.disable_initiator_tag = None
1000
if getattr(self, "enabled", False):
1001
self.disable_initiator_tag = GLib.timeout_add(
1002
int(timeout.total_seconds() * 1000), self.disable)
1003
self.expires = datetime.datetime.utcnow() + timeout
1004
1005
def need_approval(self):
1006
self.last_approval_request = datetime.datetime.utcnow()
387
1007
388
1008
def start_checker(self):
389
1009
"""Start a new checker subprocess if one is not running.
1010
390
1011
If a checker already exists, leave it running and do
391
1012
nothing."""
392
1013
# The reason for not killing a running checker is that if we
393
# did that, then if a checker (for some reason) started
394
# running slowly and taking more than 'interval' time, the
395
# client would inevitably timeout, since no checker would get
396
# a chance to run to completion. If we instead leave running
1014
# did that, and if a checker (for some reason) started running
1015
# slowly and taking more than 'interval' time, then the client
1016
# would inevitably timeout, since no checker would get a
1017
# chance to run to completion. If we instead leave running
397
1018
# checkers alone, the checker would have to take more time
398
# than 'timeout' for the client to be declared invalid, which
399
# is as it should be.
1019
# than 'timeout' for the client to be disabled, which is as it
1020
# should be.
1021
1022
if self.checker is not None and not self.checker.is_alive():
1023
logger.warning("Checker was not alive; joining")
1024
self.checker.join()
1025
self.checker = None
1026
# Start a new checker if needed
400
1027
if self.checker is None:
401
try:
402
# In case checker_command has exactly one % operator
403
command = self.checker_command % self.host
404
except TypeError:
405
# Escape attributes for the shell
406
escaped_attrs = dict((key, re.escape(str(val)))
407
for key, val in
408
vars(self).iteritems())
409
try:
410
command = self.checker_command % escaped_attrs
411
except TypeError, error:
412
logger.error(u'Could not format string "%s":'
413
u' %s', self.checker_command, error)
414
return True # Try again later
415
try:
416
logger.info(u"Starting checker %r for %s",
417
command, self.name)
418
# We don't need to redirect stdout and stderr, since
419
# in normal mode, that is already done by daemon(),
420
# and in debug mode we don't want to. (Stdin is
421
# always replaced by /dev/null.)
422
self.checker = subprocess.Popen(command,
423
close_fds=True,
424
shell=True, cwd="/")
425
# Emit D-Bus signal
426
self.CheckerStarted(command)
427
self.PropertyChanged(dbus.String("checker_running"),
428
dbus.Boolean(True, variant_level=1))
429
self.checker_callback_tag = (gobject.child_watch_add
430
(self.checker.pid,
431
self.checker_callback,
432
data=command))
433
except OSError, error:
434
logger.error(u"Failed to start subprocess: %s",
435
error)
436
# Re-run this periodically if run by gobject.timeout_add
1028
# Escape attributes for the shell
1029
escaped_attrs = {
1030
attr: re.escape(str(getattr(self, attr)))
1031
for attr in self.runtime_expansions }
1032
try:
1033
command = self.checker_command % escaped_attrs
1034
except TypeError as error:
1035
logger.error('Could not format string "%s"',
1036
self.checker_command,
1037
exc_info=error)
1038
return True # Try again later
1039
self.current_checker_command = command
1040
logger.info("Starting checker %r for %s", command,
1041
self.name)
1042
# We don't need to redirect stdout and stderr, since
1043
# in normal mode, that is already done by daemon(),
1044
# and in debug mode we don't want to. (Stdin is
1045
# always replaced by /dev/null.)
1046
# The exception is when not debugging but nevertheless
1047
# running in the foreground; use the previously
1048
# created wnull.
1049
popen_args = { "close_fds": True,
1050
"shell": True,
1051
"cwd": "/" }
1052
if (not self.server_settings["debug"]
1053
and self.server_settings["foreground"]):
1054
popen_args.update({"stdout": wnull,
1055
"stderr": wnull })
1056
pipe = multiprocessing.Pipe(duplex = False)
1057
self.checker = multiprocessing.Process(
1058
target = call_pipe,
1059
args = (pipe[1], subprocess.call, command),
1060
kwargs = popen_args)
1061
self.checker.start()
1062
self.checker_callback_tag = GLib.io_add_watch(
1063
pipe[0].fileno(), GLib.IO_IN,
1064
self.checker_callback, pipe[0], command)
1065
# Re-run this periodically if run by GLib.timeout_add
437
1066
return True
438
1067
439
1068
def stop_checker(self):
440
1069
"""Force the checker process, if any, to stop."""
441
1070
if self.checker_callback_tag:
442
gobject.source_remove(self.checker_callback_tag)
1071
GLib.source_remove(self.checker_callback_tag)
443
1072
self.checker_callback_tag = None
444
1073
if getattr(self, "checker", None) is None:
445
1074
return
446
logger.debug(u"Stopping checker for %(name)s", vars(self))
447
try:
448
os.kill(self.checker.pid, signal.SIGTERM)
449
#os.sleep(0.5)
450
#if self.checker.poll() is None:
451
# os.kill(self.checker.pid, signal.SIGKILL)
452
except OSError, error:
453
if error.errno != errno.ESRCH: # No such process
454
raise
1075
logger.debug("Stopping checker for %(name)s", vars(self))
1076
self.checker.terminate()
455
1077
self.checker = None
456
self.PropertyChanged(dbus.String(u"checker_running"),
457
dbus.Boolean(False, variant_level=1))
458
459
def still_valid(self):
460
"""Has the timeout not yet passed for this client?"""
461
if not getattr(self, "started", False):
462
return False
463
now = datetime.datetime.utcnow()
464
if self.last_checked_ok is None:
465
return now < (self.created + self.timeout)
1078
1079
1080
def dbus_service_property(dbus_interface,
1081
signature="v",
1082
access="readwrite",
1083
byte_arrays=False):
1084
"""Decorators for marking methods of a DBusObjectWithProperties to
1085
become properties on the D-Bus.
1086
1087
The decorated method will be called with no arguments by "Get"
1088
and with one argument by "Set".
1089
1090
The parameters, where they are supported, are the same as
1091
dbus.service.method, except there is only "signature", since the
1092
type from Get() and the type sent to Set() is the same.
1093
"""
1094
# Encoding deeply encoded byte arrays is not supported yet by the
1095
# "Set" method, so we fail early here:
1096
if byte_arrays and signature != "ay":
1097
raise ValueError("Byte arrays not supported for non-'ay'"
1098
" signature {!r}".format(signature))
1099
1100
def decorator(func):
1101
func._dbus_is_property = True
1102
func._dbus_interface = dbus_interface
1103
func._dbus_signature = signature
1104
func._dbus_access = access
1105
func._dbus_name = func.__name__
1106
if func._dbus_name.endswith("_dbus_property"):
1107
func._dbus_name = func._dbus_name[:-14]
1108
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
1109
return func
1110
1111
return decorator
1112
1113
1114
def dbus_interface_annotations(dbus_interface):
1115
"""Decorator for marking functions returning interface annotations
1116
1117
Usage:
1118
1119
@dbus_interface_annotations("org.example.Interface")
1120
def _foo(self): # Function name does not matter
1121
return {"org.freedesktop.DBus.Deprecated": "true",
1122
"org.freedesktop.DBus.Property.EmitsChangedSignal":
1123
"false"}
1124
"""
1125
1126
def decorator(func):
1127
func._dbus_is_interface = True
1128
func._dbus_interface = dbus_interface
1129
func._dbus_name = dbus_interface
1130
return func
1131
1132
return decorator
1133
1134
1135
def dbus_annotations(annotations):
1136
"""Decorator to annotate D-Bus methods, signals or properties
1137
Usage:
1138
1139
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
1140
"org.freedesktop.DBus.Property."
1141
"EmitsChangedSignal": "false"})
1142
@dbus_service_property("org.example.Interface", signature="b",
1143
access="r")
1144
def Property_dbus_property(self):
1145
return dbus.Boolean(False)
1146
1147
See also the DBusObjectWithAnnotations class.
1148
"""
1149
1150
def decorator(func):
1151
func._dbus_annotations = annotations
1152
return func
1153
1154
return decorator
1155
1156
1157
class DBusPropertyException(dbus.exceptions.DBusException):
1158
"""A base class for D-Bus property-related exceptions
1159
"""
1160
pass
1161
1162
1163
class DBusPropertyAccessException(DBusPropertyException):
1164
"""A property's access permissions disallows an operation.
1165
"""
1166
pass
1167
1168
1169
class DBusPropertyNotFound(DBusPropertyException):
1170
"""An attempt was made to access a non-existing property.
1171
"""
1172
pass
1173
1174
1175
class DBusObjectWithAnnotations(dbus.service.Object):
1176
"""A D-Bus object with annotations.
1177
1178
Classes inheriting from this can use the dbus_annotations
1179
decorator to add annotations to methods or signals.
1180
"""
1181
1182
@staticmethod
1183
def _is_dbus_thing(thing):
1184
"""Returns a function testing if an attribute is a D-Bus thing
1185
1186
If called like _is_dbus_thing("method") it returns a function
1187
suitable for use as predicate to inspect.getmembers().
1188
"""
1189
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
1190
False)
1191
1192
def _get_all_dbus_things(self, thing):
1193
"""Returns a generator of (name, attribute) pairs
1194
"""
1195
return ((getattr(athing.__get__(self), "_dbus_name", name),
1196
athing.__get__(self))
1197
for cls in self.__class__.__mro__
1198
for name, athing in
1199
inspect.getmembers(cls, self._is_dbus_thing(thing)))
1200
1201
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1202
out_signature = "s",
1203
path_keyword = 'object_path',
1204
connection_keyword = 'connection')
1205
def Introspect(self, object_path, connection):
1206
"""Overloading of standard D-Bus method.
1207
1208
Inserts annotation tags on methods and signals.
1209
"""
1210
xmlstring = dbus.service.Object.Introspect(self, object_path,
1211
connection)
1212
try:
1213
document = xml.dom.minidom.parseString(xmlstring)
1214
1215
for if_tag in document.getElementsByTagName("interface"):
1216
# Add annotation tags
1217
for typ in ("method", "signal"):
1218
for tag in if_tag.getElementsByTagName(typ):
1219
annots = dict()
1220
for name, prop in (self.
1221
_get_all_dbus_things(typ)):
1222
if (name == tag.getAttribute("name")
1223
and prop._dbus_interface
1224
== if_tag.getAttribute("name")):
1225
annots.update(getattr(
1226
prop, "_dbus_annotations", {}))
1227
for name, value in annots.items():
1228
ann_tag = document.createElement(
1229
"annotation")
1230
ann_tag.setAttribute("name", name)
1231
ann_tag.setAttribute("value", value)
1232
tag.appendChild(ann_tag)
1233
# Add interface annotation tags
1234
for annotation, value in dict(
1235
itertools.chain.from_iterable(
1236
annotations().items()
1237
for name, annotations
1238
in self._get_all_dbus_things("interface")
1239
if name == if_tag.getAttribute("name")
1240
)).items():
1241
ann_tag = document.createElement("annotation")
1242
ann_tag.setAttribute("name", annotation)
1243
ann_tag.setAttribute("value", value)
1244
if_tag.appendChild(ann_tag)
1245
# Fix argument name for the Introspect method itself
1246
if (if_tag.getAttribute("name")
1247
== dbus.INTROSPECTABLE_IFACE):
1248
for cn in if_tag.getElementsByTagName("method"):
1249
if cn.getAttribute("name") == "Introspect":
1250
for arg in cn.getElementsByTagName("arg"):
1251
if (arg.getAttribute("direction")
1252
== "out"):
1253
arg.setAttribute("name",
1254
"xml_data")
1255
xmlstring = document.toxml("utf-8")
1256
document.unlink()
1257
except (AttributeError, xml.dom.DOMException,
1258
xml.parsers.expat.ExpatError) as error:
1259
logger.error("Failed to override Introspection method",
1260
exc_info=error)
1261
return xmlstring
1262
1263
1264
class DBusObjectWithProperties(DBusObjectWithAnnotations):
1265
"""A D-Bus object with properties.
1266
1267
Classes inheriting from this can use the dbus_service_property
1268
decorator to expose methods as D-Bus properties. It exposes the
1269
standard Get(), Set(), and GetAll() methods on the D-Bus.
1270
"""
1271
1272
def _get_dbus_property(self, interface_name, property_name):
1273
"""Returns a bound method if one exists which is a D-Bus
1274
property with the specified name and interface.
1275
"""
1276
for cls in self.__class__.__mro__:
1277
for name, value in inspect.getmembers(
1278
cls, self._is_dbus_thing("property")):
1279
if (value._dbus_name == property_name
1280
and value._dbus_interface == interface_name):
1281
return value.__get__(self)
1282
1283
# No such property
1284
raise DBusPropertyNotFound("{}:{}.{}".format(
1285
self.dbus_object_path, interface_name, property_name))
1286
1287
@classmethod
1288
def _get_all_interface_names(cls):
1289
"""Get a sequence of all interfaces supported by an object"""
1290
return (name for name in set(getattr(getattr(x, attr),
1291
"_dbus_interface", None)
1292
for x in (inspect.getmro(cls))
1293
for attr in dir(x))
1294
if name is not None)
1295
1296
@dbus.service.method(dbus.PROPERTIES_IFACE,
1297
in_signature="ss",
1298
out_signature="v")
1299
def Get(self, interface_name, property_name):
1300
"""Standard D-Bus property Get() method, see D-Bus standard.
1301
"""
1302
prop = self._get_dbus_property(interface_name, property_name)
1303
if prop._dbus_access == "write":
1304
raise DBusPropertyAccessException(property_name)
1305
value = prop()
1306
if not hasattr(value, "variant_level"):
1307
return value
1308
return type(value)(value, variant_level=value.variant_level+1)
1309
1310
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
1311
def Set(self, interface_name, property_name, value):
1312
"""Standard D-Bus property Set() method, see D-Bus standard.
1313
"""
1314
prop = self._get_dbus_property(interface_name, property_name)
1315
if prop._dbus_access == "read":
1316
raise DBusPropertyAccessException(property_name)
1317
if prop._dbus_get_args_options["byte_arrays"]:
1318
# The byte_arrays option is not supported yet on
1319
# signatures other than "ay".
1320
if prop._dbus_signature != "ay":
1321
raise ValueError("Byte arrays not supported for non-"
1322
"'ay' signature {!r}"
1323
.format(prop._dbus_signature))
1324
value = dbus.ByteArray(b''.join(chr(byte)
1325
for byte in value))
1326
prop(value)
1327
1328
@dbus.service.method(dbus.PROPERTIES_IFACE,
1329
in_signature="s",
1330
out_signature="a{sv}")
1331
def GetAll(self, interface_name):
1332
"""Standard D-Bus property GetAll() method, see D-Bus
1333
standard.
1334
1335
Note: Will not include properties with access="write".
1336
"""
1337
properties = {}
1338
for name, prop in self._get_all_dbus_things("property"):
1339
if (interface_name
1340
and interface_name != prop._dbus_interface):
1341
# Interface non-empty but did not match
1342
continue
1343
# Ignore write-only properties
1344
if prop._dbus_access == "write":
1345
continue
1346
value = prop()
1347
if not hasattr(value, "variant_level"):
1348
properties[name] = value
1349
continue
1350
properties[name] = type(value)(
1351
value, variant_level = value.variant_level + 1)
1352
return dbus.Dictionary(properties, signature="sv")
1353
1354
@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
1355
def PropertiesChanged(self, interface_name, changed_properties,
1356
invalidated_properties):
1357
"""Standard D-Bus PropertiesChanged() signal, see D-Bus
1358
standard.
1359
"""
1360
pass
1361
1362
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1363
out_signature="s",
1364
path_keyword='object_path',
1365
connection_keyword='connection')
1366
def Introspect(self, object_path, connection):
1367
"""Overloading of standard D-Bus method.
1368
1369
Inserts property tags and interface annotation tags.
1370
"""
1371
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1372
object_path,
1373
connection)
1374
try:
1375
document = xml.dom.minidom.parseString(xmlstring)
1376
1377
def make_tag(document, name, prop):
1378
e = document.createElement("property")
1379
e.setAttribute("name", name)
1380
e.setAttribute("type", prop._dbus_signature)
1381
e.setAttribute("access", prop._dbus_access)
1382
return e
1383
1384
for if_tag in document.getElementsByTagName("interface"):
1385
# Add property tags
1386
for tag in (make_tag(document, name, prop)
1387
for name, prop
1388
in self._get_all_dbus_things("property")
1389
if prop._dbus_interface
1390
== if_tag.getAttribute("name")):
1391
if_tag.appendChild(tag)
1392
# Add annotation tags for properties
1393
for tag in if_tag.getElementsByTagName("property"):
1394
annots = dict()
1395
for name, prop in self._get_all_dbus_things(
1396
"property"):
1397
if (name == tag.getAttribute("name")
1398
and prop._dbus_interface
1399
== if_tag.getAttribute("name")):
1400
annots.update(getattr(
1401
prop, "_dbus_annotations", {}))
1402
for name, value in annots.items():
1403
ann_tag = document.createElement(
1404
"annotation")
1405
ann_tag.setAttribute("name", name)
1406
ann_tag.setAttribute("value", value)
1407
tag.appendChild(ann_tag)
1408
# Add the names to the return values for the
1409
# "org.freedesktop.DBus.Properties" methods
1410
if (if_tag.getAttribute("name")
1411
== "org.freedesktop.DBus.Properties"):
1412
for cn in if_tag.getElementsByTagName("method"):
1413
if cn.getAttribute("name") == "Get":
1414
for arg in cn.getElementsByTagName("arg"):
1415
if (arg.getAttribute("direction")
1416
== "out"):
1417
arg.setAttribute("name", "value")
1418
elif cn.getAttribute("name") == "GetAll":
1419
for arg in cn.getElementsByTagName("arg"):
1420
if (arg.getAttribute("direction")
1421
== "out"):
1422
arg.setAttribute("name", "props")
1423
xmlstring = document.toxml("utf-8")
1424
document.unlink()
1425
except (AttributeError, xml.dom.DOMException,
1426
xml.parsers.expat.ExpatError) as error:
1427
logger.error("Failed to override Introspection method",
1428
exc_info=error)
1429
return xmlstring
1430
1431
try:
1432
dbus.OBJECT_MANAGER_IFACE
1433
except AttributeError:
1434
dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1435
1436
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1437
"""A D-Bus object with an ObjectManager.
1438
1439
Classes inheriting from this exposes the standard
1440
GetManagedObjects call and the InterfacesAdded and
1441
InterfacesRemoved signals on the standard
1442
"org.freedesktop.DBus.ObjectManager" interface.
1443
1444
Note: No signals are sent automatically; they must be sent
1445
manually.
1446
"""
1447
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1448
out_signature = "a{oa{sa{sv}}}")
1449
def GetManagedObjects(self):
1450
"""This function must be overridden"""
1451
raise NotImplementedError()
1452
1453
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1454
signature = "oa{sa{sv}}")
1455
def InterfacesAdded(self, object_path, interfaces_and_properties):
1456
pass
1457
1458
@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature = "oas")
1459
def InterfacesRemoved(self, object_path, interfaces):
1460
pass
1461
1462
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1463
out_signature = "s",
1464
path_keyword = 'object_path',
1465
connection_keyword = 'connection')
1466
def Introspect(self, object_path, connection):
1467
"""Overloading of standard D-Bus method.
1468
1469
Override return argument name of GetManagedObjects to be
1470
"objpath_interfaces_and_properties"
1471
"""
1472
xmlstring = DBusObjectWithAnnotations.Introspect(self,
1473
object_path,
1474
connection)
1475
try:
1476
document = xml.dom.minidom.parseString(xmlstring)
1477
1478
for if_tag in document.getElementsByTagName("interface"):
1479
# Fix argument name for the GetManagedObjects method
1480
if (if_tag.getAttribute("name")
1481
== dbus.OBJECT_MANAGER_IFACE):
1482
for cn in if_tag.getElementsByTagName("method"):
1483
if (cn.getAttribute("name")
1484
== "GetManagedObjects"):
1485
for arg in cn.getElementsByTagName("arg"):
1486
if (arg.getAttribute("direction")
1487
== "out"):
1488
arg.setAttribute(
1489
"name",
1490
"objpath_interfaces"
1491
"_and_properties")
1492
xmlstring = document.toxml("utf-8")
1493
document.unlink()
1494
except (AttributeError, xml.dom.DOMException,
1495
xml.parsers.expat.ExpatError) as error:
1496
logger.error("Failed to override Introspection method",
1497
exc_info = error)
1498
return xmlstring
1499
1500
def datetime_to_dbus(dt, variant_level=0):
1501
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1502
if dt is None:
1503
return dbus.String("", variant_level = variant_level)
1504
return dbus.String(dt.isoformat(), variant_level=variant_level)
1505
1506
1507
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1508
"""A class decorator; applied to a subclass of
1509
dbus.service.Object, it will add alternate D-Bus attributes with
1510
interface names according to the "alt_interface_names" mapping.
1511
Usage:
1512
1513
@alternate_dbus_interfaces({"org.example.Interface":
1514
"net.example.AlternateInterface"})
1515
class SampleDBusObject(dbus.service.Object):
1516
@dbus.service.method("org.example.Interface")
1517
def SampleDBusMethod():
1518
pass
1519
1520
The above "SampleDBusMethod" on "SampleDBusObject" will be
1521
reachable via two interfaces: "org.example.Interface" and
1522
"net.example.AlternateInterface", the latter of which will have
1523
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1524
"true", unless "deprecate" is passed with a False value.
1525
1526
This works for methods and signals, and also for D-Bus properties
1527
(from DBusObjectWithProperties) and interfaces (from the
1528
dbus_interface_annotations decorator).
1529
"""
1530
1531
def wrapper(cls):
1532
for orig_interface_name, alt_interface_name in (
1533
alt_interface_names.items()):
1534
attr = {}
1535
interface_names = set()
1536
# Go though all attributes of the class
1537
for attrname, attribute in inspect.getmembers(cls):
1538
# Ignore non-D-Bus attributes, and D-Bus attributes
1539
# with the wrong interface name
1540
if (not hasattr(attribute, "_dbus_interface")
1541
or not attribute._dbus_interface.startswith(
1542
orig_interface_name)):
1543
continue
1544
# Create an alternate D-Bus interface name based on
1545
# the current name
1546
alt_interface = attribute._dbus_interface.replace(
1547
orig_interface_name, alt_interface_name)
1548
interface_names.add(alt_interface)
1549
# Is this a D-Bus signal?
1550
if getattr(attribute, "_dbus_is_signal", False):
1551
# Extract the original non-method undecorated
1552
# function by black magic
1553
if sys.version_info.major == 2:
1554
nonmethod_func = (dict(
1555
zip(attribute.func_code.co_freevars,
1556
attribute.__closure__))
1557
["func"].cell_contents)
1558
else:
1559
nonmethod_func = (dict(
1560
zip(attribute.__code__.co_freevars,
1561
attribute.__closure__))
1562
["func"].cell_contents)
1563
# Create a new, but exactly alike, function
1564
# object, and decorate it to be a new D-Bus signal
1565
# with the alternate D-Bus interface name
1566
new_function = copy_function(nonmethod_func)
1567
new_function = (dbus.service.signal(
1568
alt_interface,
1569
attribute._dbus_signature)(new_function))
1570
# Copy annotations, if any
1571
try:
1572
new_function._dbus_annotations = dict(
1573
attribute._dbus_annotations)
1574
except AttributeError:
1575
pass
1576
# Define a creator of a function to call both the
1577
# original and alternate functions, so both the
1578
# original and alternate signals gets sent when
1579
# the function is called
1580
def fixscope(func1, func2):
1581
"""This function is a scope container to pass
1582
func1 and func2 to the "call_both" function
1583
outside of its arguments"""
1584
1585
@functools.wraps(func2)
1586
def call_both(*args, **kwargs):
1587
"""This function will emit two D-Bus
1588
signals by calling func1 and func2"""
1589
func1(*args, **kwargs)
1590
func2(*args, **kwargs)
1591
# Make wrapper function look like a D-Bus signal
1592
for name, attr in inspect.getmembers(func2):
1593
if name.startswith("_dbus_"):
1594
setattr(call_both, name, attr)
1595
1596
return call_both
1597
# Create the "call_both" function and add it to
1598
# the class
1599
attr[attrname] = fixscope(attribute, new_function)
1600
# Is this a D-Bus method?
1601
elif getattr(attribute, "_dbus_is_method", False):
1602
# Create a new, but exactly alike, function
1603
# object. Decorate it to be a new D-Bus method
1604
# with the alternate D-Bus interface name. Add it
1605
# to the class.
1606
attr[attrname] = (
1607
dbus.service.method(
1608
alt_interface,
1609
attribute._dbus_in_signature,
1610
attribute._dbus_out_signature)
1611
(copy_function(attribute)))
1612
# Copy annotations, if any
1613
try:
1614
attr[attrname]._dbus_annotations = dict(
1615
attribute._dbus_annotations)
1616
except AttributeError:
1617
pass
1618
# Is this a D-Bus property?
1619
elif getattr(attribute, "_dbus_is_property", False):
1620
# Create a new, but exactly alike, function
1621
# object, and decorate it to be a new D-Bus
1622
# property with the alternate D-Bus interface
1623
# name. Add it to the class.
1624
attr[attrname] = (dbus_service_property(
1625
alt_interface, attribute._dbus_signature,
1626
attribute._dbus_access,
1627
attribute._dbus_get_args_options
1628
["byte_arrays"])
1629
(copy_function(attribute)))
1630
# Copy annotations, if any
1631
try:
1632
attr[attrname]._dbus_annotations = dict(
1633
attribute._dbus_annotations)
1634
except AttributeError:
1635
pass
1636
# Is this a D-Bus interface?
1637
elif getattr(attribute, "_dbus_is_interface", False):
1638
# Create a new, but exactly alike, function
1639
# object. Decorate it to be a new D-Bus interface
1640
# with the alternate D-Bus interface name. Add it
1641
# to the class.
1642
attr[attrname] = (
1643
dbus_interface_annotations(alt_interface)
1644
(copy_function(attribute)))
1645
if deprecate:
1646
# Deprecate all alternate interfaces
1647
iname="_AlternateDBusNames_interface_annotation{}"
1648
for interface_name in interface_names:
1649
1650
@dbus_interface_annotations(interface_name)
1651
def func(self):
1652
return { "org.freedesktop.DBus.Deprecated":
1653
"true" }
1654
# Find an unused name
1655
for aname in (iname.format(i)
1656
for i in itertools.count()):
1657
if aname not in attr:
1658
attr[aname] = func
1659
break
1660
if interface_names:
1661
# Replace the class with a new subclass of it with
1662
# methods, signals, etc. as created above.
1663
if sys.version_info.major == 2:
1664
cls = type(b"{}Alternate".format(cls.__name__),
1665
(cls, ), attr)
1666
else:
1667
cls = type("{}Alternate".format(cls.__name__),
1668
(cls, ), attr)
1669
return cls
1670
1671
return wrapper
1672
1673
1674
@alternate_dbus_interfaces({"se.recompile.Mandos":
1675
"se.bsnet.fukt.Mandos"})
1676
class ClientDBus(Client, DBusObjectWithProperties):
1677
"""A Client class using D-Bus
1678
1679
Attributes:
1680
dbus_object_path: dbus.ObjectPath
1681
bus: dbus.SystemBus()
1682
"""
1683
1684
runtime_expansions = (Client.runtime_expansions
1685
+ ("dbus_object_path", ))
1686
1687
_interface = "se.recompile.Mandos.Client"
1688
1689
# dbus.service.Object doesn't use super(), so we can't either.
1690
1691
def __init__(self, bus = None, *args, **kwargs):
1692
self.bus = bus
1693
Client.__init__(self, *args, **kwargs)
1694
# Only now, when this client is initialized, can it show up on
1695
# the D-Bus
1696
client_object_name = str(self.name).translate(
1697
{ord("."): ord("_"),
1698
ord("-"): ord("_")})
1699
self.dbus_object_path = dbus.ObjectPath(
1700
"/clients/" + client_object_name)
1701
DBusObjectWithProperties.__init__(self, self.bus,
1702
self.dbus_object_path)
1703
1704
def notifychangeproperty(transform_func, dbus_name,
1705
type_func=lambda x: x,
1706
variant_level=1,
1707
invalidate_only=False,
1708
_interface=_interface):
1709
""" Modify a variable so that it's a property which announces
1710
its changes to DBus.
1711
1712
transform_fun: Function that takes a value and a variant_level
1713
and transforms it to a D-Bus type.
1714
dbus_name: D-Bus name of the variable
1715
type_func: Function that transform the value before sending it
1716
to the D-Bus. Default: no transform
1717
variant_level: D-Bus variant level. Default: 1
1718
"""
1719
attrname = "_{}".format(dbus_name)
1720
1721
def setter(self, value):
1722
if hasattr(self, "dbus_object_path"):
1723
if (not hasattr(self, attrname) or
1724
type_func(getattr(self, attrname, None))
1725
!= type_func(value)):
1726
if invalidate_only:
1727
self.PropertiesChanged(
1728
_interface, dbus.Dictionary(),
1729
dbus.Array((dbus_name, )))
1730
else:
1731
dbus_value = transform_func(
1732
type_func(value),
1733
variant_level = variant_level)
1734
self.PropertyChanged(dbus.String(dbus_name),
1735
dbus_value)
1736
self.PropertiesChanged(
1737
_interface,
1738
dbus.Dictionary({ dbus.String(dbus_name):
1739
dbus_value }),
1740
dbus.Array())
1741
setattr(self, attrname, value)
1742
1743
return property(lambda self: getattr(self, attrname), setter)
1744
1745
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1746
approvals_pending = notifychangeproperty(dbus.Boolean,
1747
"ApprovalPending",
1748
type_func = bool)
1749
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1750
last_enabled = notifychangeproperty(datetime_to_dbus,
1751
"LastEnabled")
1752
checker = notifychangeproperty(
1753
dbus.Boolean, "CheckerRunning",
1754
type_func = lambda checker: checker is not None)
1755
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1756
"LastCheckedOK")
1757
last_checker_status = notifychangeproperty(dbus.Int16,
1758
"LastCheckerStatus")
1759
last_approval_request = notifychangeproperty(
1760
datetime_to_dbus, "LastApprovalRequest")
1761
approved_by_default = notifychangeproperty(dbus.Boolean,
1762
"ApprovedByDefault")
1763
approval_delay = notifychangeproperty(
1764
dbus.UInt64, "ApprovalDelay",
1765
type_func = lambda td: td.total_seconds() * 1000)
1766
approval_duration = notifychangeproperty(
1767
dbus.UInt64, "ApprovalDuration",
1768
type_func = lambda td: td.total_seconds() * 1000)
1769
host = notifychangeproperty(dbus.String, "Host")
1770
timeout = notifychangeproperty(
1771
dbus.UInt64, "Timeout",
1772
type_func = lambda td: td.total_seconds() * 1000)
1773
extended_timeout = notifychangeproperty(
1774
dbus.UInt64, "ExtendedTimeout",
1775
type_func = lambda td: td.total_seconds() * 1000)
1776
interval = notifychangeproperty(
1777
dbus.UInt64, "Interval",
1778
type_func = lambda td: td.total_seconds() * 1000)
1779
checker_command = notifychangeproperty(dbus.String, "Checker")
1780
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1781
invalidate_only=True)
1782
1783
del notifychangeproperty
1784
1785
def __del__(self, *args, **kwargs):
1786
try:
1787
self.remove_from_connection()
1788
except LookupError:
1789
pass
1790
if hasattr(DBusObjectWithProperties, "__del__"):
1791
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1792
Client.__del__(self, *args, **kwargs)
1793
1794
def checker_callback(self, source, condition,
1795
connection, command, *args, **kwargs):
1796
ret = Client.checker_callback(self, source, condition,
1797
connection, command, *args,
1798
**kwargs)
1799
exitstatus = self.last_checker_status
1800
if exitstatus >= 0:
1801
# Emit D-Bus signal
1802
self.CheckerCompleted(dbus.Int16(exitstatus),
1803
# This is specific to GNU libC
1804
dbus.Int64(exitstatus << 8),
1805
dbus.String(command))
466
1806
else:
467
return now < (self.last_checked_ok + self.timeout)
468
469
## D-Bus methods & signals
470
_interface = u"org.mandos_system.Mandos.Client"
471
472
# BumpTimeout - method
473
BumpTimeout = dbus.service.method(_interface)(bump_timeout)
474
BumpTimeout.__name__ = "BumpTimeout"
1807
# Emit D-Bus signal
1808
self.CheckerCompleted(dbus.Int16(-1),
1809
dbus.Int64(
1810
# This is specific to GNU libC
1811
(exitstatus << 8)
1812
| self.last_checker_signal),
1813
dbus.String(command))
1814
return ret
1815
1816
def start_checker(self, *args, **kwargs):
1817
old_checker_pid = getattr(self.checker, "pid", None)
1818
r = Client.start_checker(self, *args, **kwargs)
1819
# Only if new checker process was started
1820
if (self.checker is not None
1821
and old_checker_pid != self.checker.pid):
1822
# Emit D-Bus signal
1823
self.CheckerStarted(self.current_checker_command)
1824
return r
1825
1826
def _reset_approved(self):
1827
self.approved = None
1828
return False
1829
1830
def approve(self, value=True):
1831
self.approved = value
1832
GLib.timeout_add(int(self.approval_duration.total_seconds()
1833
* 1000), self._reset_approved)
1834
self.send_changedstate()
1835
1836
## D-Bus methods, signals & properties
1837
1838
## Interfaces
1839
1840
## Signals
475
1841
476
1842
# CheckerCompleted - signal
477
@dbus.service.signal(_interface, signature="bqs")
478
def CheckerCompleted(self, success, condition, command):
1843
@dbus.service.signal(_interface, signature="nxs")
1844
def CheckerCompleted(self, exitcode, waitstatus, command):
479
1845
"D-Bus signal"
480
1846
pass
481
1847
485
1851
"D-Bus signal"
486
1852
pass
487
1853
488
# GetAllProperties - method
489
@dbus.service.method(_interface, out_signature="a{sv}")
490
def GetAllProperties(self):
491
"D-Bus method"
492
return dbus.Dictionary({
493
dbus.String("name"):
494
dbus.String(self.name, variant_level=1),
495
dbus.String("fingerprint"):
496
dbus.String(self.fingerprint, variant_level=1),
497
dbus.String("host"):
498
dbus.String(self.host, variant_level=1),
499
dbus.String("created"):
500
_datetime_to_dbus_struct(self.created,
501
variant_level=1),
502
dbus.String("last_started"):
503
(_datetime_to_dbus_struct(self.last_started,
504
variant_level=1)
505
if self.last_started is not None
506
else dbus.Boolean(False, variant_level=1)),
507
dbus.String("started"):
508
dbus.Boolean(self.started, variant_level=1),
509
dbus.String("last_checked_ok"):
510
(_datetime_to_dbus_struct(self.last_checked_ok,
511
variant_level=1)
512
if self.last_checked_ok is not None
513
else dbus.Boolean (False, variant_level=1)),
514
dbus.String("timeout"):
515
dbus.UInt64(self._timeout_milliseconds,
516
variant_level=1),
517
dbus.String("interval"):
518
dbus.UInt64(self._interval_milliseconds,
519
variant_level=1),
520
dbus.String("checker"):
521
dbus.String(self.checker_command,
522
variant_level=1),
523
dbus.String("checker_running"):
524
dbus.Boolean(self.checker is not None,
525
variant_level=1),
526
}, signature="sv")
527
528
# IsStillValid - method
529
IsStillValid = (dbus.service.method(_interface, out_signature="b")
530
(still_valid))
531
IsStillValid.__name__ = "IsStillValid"
532
533
1854
# PropertyChanged - signal
1855
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
534
1856
@dbus.service.signal(_interface, signature="sv")
535
1857
def PropertyChanged(self, property, value):
536
1858
"D-Bus signal"
537
1859
pass
538
1860
539
# SetChecker - method
540
@dbus.service.method(_interface, in_signature="s")
541
def SetChecker(self, checker):
542
"D-Bus setter method"
543
self.checker_command = checker
544
545
# SetHost - method
546
@dbus.service.method(_interface, in_signature="s")
547
def SetHost(self, host):
548
"D-Bus setter method"
549
self.host = host
550
551
# SetInterval - method
552
@dbus.service.method(_interface, in_signature="t")
553
def SetInterval(self, milliseconds):
554
self.interval = datetime.timdeelta(0, 0, 0, milliseconds)
555
556
# SetSecret - method
557
@dbus.service.method(_interface, in_signature="ay",
558
byte_arrays=True)
559
def SetSecret(self, secret):
560
"D-Bus setter method"
561
self.secret = str(secret)
562
563
# SetTimeout - method
564
@dbus.service.method(_interface, in_signature="t")
565
def SetTimeout(self, milliseconds):
566
self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
567
568
# Start - method
569
Start = dbus.service.method(_interface)(start)
570
Start.__name__ = "Start"
1861
# GotSecret - signal
1862
@dbus.service.signal(_interface)
1863
def GotSecret(self):
1864
"""D-Bus signal
1865
Is sent after a successful transfer of secret from the Mandos
1866
server to mandos-client
1867
"""
1868
pass
1869
1870
# Rejected - signal
1871
@dbus.service.signal(_interface, signature="s")
1872
def Rejected(self, reason):
1873
"D-Bus signal"
1874
pass
1875
1876
# NeedApproval - signal
1877
@dbus.service.signal(_interface, signature="tb")
1878
def NeedApproval(self, timeout, default):
1879
"D-Bus signal"
1880
return self.need_approval()
1881
1882
## Methods
1883
1884
# Approve - method
1885
@dbus.service.method(_interface, in_signature="b")
1886
def Approve(self, value):
1887
self.approve(value)
1888
1889
# CheckedOK - method
1890
@dbus.service.method(_interface)
1891
def CheckedOK(self):
1892
self.checked_ok()
1893
1894
# Enable - method
1895
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1896
@dbus.service.method(_interface)
1897
def Enable(self):
1898
"D-Bus method"
1899
self.enable()
571
1900
572
1901
# StartChecker - method
1902
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
573
1903
@dbus.service.method(_interface)
574
1904
def StartChecker(self):
575
1905
"D-Bus method"
576
1906
self.start_checker()
577
1907
578
# Stop - method
1908
# Disable - method
1909
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
579
1910
@dbus.service.method(_interface)
580
def Stop(self):
1911
def Disable(self):
581
1912
"D-Bus method"
582
self.stop()
1913
self.disable()
583
1914
584
1915
# StopChecker - method
585
StopChecker = dbus.service.method(_interface)(stop_checker)
586
StopChecker.__name__ = "StopChecker"
1916
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1917
@dbus.service.method(_interface)
1918
def StopChecker(self):
1919
self.stop_checker()
1920
1921
## Properties
1922
1923
# ApprovalPending - property
1924
@dbus_service_property(_interface, signature="b", access="read")
1925
def ApprovalPending_dbus_property(self):
1926
return dbus.Boolean(bool(self.approvals_pending))
1927
1928
# ApprovedByDefault - property
1929
@dbus_service_property(_interface,
1930
signature="b",
1931
access="readwrite")
1932
def ApprovedByDefault_dbus_property(self, value=None):
1933
if value is None: # get
1934
return dbus.Boolean(self.approved_by_default)
1935
self.approved_by_default = bool(value)
1936
1937
# ApprovalDelay - property
1938
@dbus_service_property(_interface,
1939
signature="t",
1940
access="readwrite")
1941
def ApprovalDelay_dbus_property(self, value=None):
1942
if value is None: # get
1943
return dbus.UInt64(self.approval_delay.total_seconds()
1944
* 1000)
1945
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1946
1947
# ApprovalDuration - property
1948
@dbus_service_property(_interface,
1949
signature="t",
1950
access="readwrite")
1951
def ApprovalDuration_dbus_property(self, value=None):
1952
if value is None: # get
1953
return dbus.UInt64(self.approval_duration.total_seconds()
1954
* 1000)
1955
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1956
1957
# Name - property
1958
@dbus_annotations(
1959
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1960
@dbus_service_property(_interface, signature="s", access="read")
1961
def Name_dbus_property(self):
1962
return dbus.String(self.name)
1963
1964
# Fingerprint - property
1965
@dbus_annotations(
1966
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1967
@dbus_service_property(_interface, signature="s", access="read")
1968
def Fingerprint_dbus_property(self):
1969
return dbus.String(self.fingerprint)
1970
1971
# Host - property
1972
@dbus_service_property(_interface,
1973
signature="s",
1974
access="readwrite")
1975
def Host_dbus_property(self, value=None):
1976
if value is None: # get
1977
return dbus.String(self.host)
1978
self.host = str(value)
1979
1980
# Created - property
1981
@dbus_annotations(
1982
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1983
@dbus_service_property(_interface, signature="s", access="read")
1984
def Created_dbus_property(self):
1985
return datetime_to_dbus(self.created)
1986
1987
# LastEnabled - property
1988
@dbus_service_property(_interface, signature="s", access="read")
1989
def LastEnabled_dbus_property(self):
1990
return datetime_to_dbus(self.last_enabled)
1991
1992
# Enabled - property
1993
@dbus_service_property(_interface,
1994
signature="b",
1995
access="readwrite")
1996
def Enabled_dbus_property(self, value=None):
1997
if value is None: # get
1998
return dbus.Boolean(self.enabled)
1999
if value:
2000
self.enable()
2001
else:
2002
self.disable()
2003
2004
# LastCheckedOK - property
2005
@dbus_service_property(_interface,
2006
signature="s",
2007
access="readwrite")
2008
def LastCheckedOK_dbus_property(self, value=None):
2009
if value is not None:
2010
self.checked_ok()
2011
return
2012
return datetime_to_dbus(self.last_checked_ok)
2013
2014
# LastCheckerStatus - property
2015
@dbus_service_property(_interface, signature="n", access="read")
2016
def LastCheckerStatus_dbus_property(self):
2017
return dbus.Int16(self.last_checker_status)
2018
2019
# Expires - property
2020
@dbus_service_property(_interface, signature="s", access="read")
2021
def Expires_dbus_property(self):
2022
return datetime_to_dbus(self.expires)
2023
2024
# LastApprovalRequest - property
2025
@dbus_service_property(_interface, signature="s", access="read")
2026
def LastApprovalRequest_dbus_property(self):
2027
return datetime_to_dbus(self.last_approval_request)
2028
2029
# Timeout - property
2030
@dbus_service_property(_interface,
2031
signature="t",
2032
access="readwrite")
2033
def Timeout_dbus_property(self, value=None):
2034
if value is None: # get
2035
return dbus.UInt64(self.timeout.total_seconds() * 1000)
2036
old_timeout = self.timeout
2037
self.timeout = datetime.timedelta(0, 0, 0, value)
2038
# Reschedule disabling
2039
if self.enabled:
2040
now = datetime.datetime.utcnow()
2041
self.expires += self.timeout - old_timeout
2042
if self.expires <= now:
2043
# The timeout has passed
2044
self.disable()
2045
else:
2046
if (getattr(self, "disable_initiator_tag", None)
2047
is None):
2048
return
2049
GLib.source_remove(self.disable_initiator_tag)
2050
self.disable_initiator_tag = GLib.timeout_add(
2051
int((self.expires - now).total_seconds() * 1000),
2052
self.disable)
2053
2054
# ExtendedTimeout - property
2055
@dbus_service_property(_interface,
2056
signature="t",
2057
access="readwrite")
2058
def ExtendedTimeout_dbus_property(self, value=None):
2059
if value is None: # get
2060
return dbus.UInt64(self.extended_timeout.total_seconds()
2061
* 1000)
2062
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
2063
2064
# Interval - property
2065
@dbus_service_property(_interface,
2066
signature="t",
2067
access="readwrite")
2068
def Interval_dbus_property(self, value=None):
2069
if value is None: # get
2070
return dbus.UInt64(self.interval.total_seconds() * 1000)
2071
self.interval = datetime.timedelta(0, 0, 0, value)
2072
if getattr(self, "checker_initiator_tag", None) is None:
2073
return
2074
if self.enabled:
2075
# Reschedule checker run
2076
GLib.source_remove(self.checker_initiator_tag)
2077
self.checker_initiator_tag = GLib.timeout_add(
2078
value, self.start_checker)
2079
self.start_checker() # Start one now, too
2080
2081
# Checker - property
2082
@dbus_service_property(_interface,
2083
signature="s",
2084
access="readwrite")
2085
def Checker_dbus_property(self, value=None):
2086
if value is None: # get
2087
return dbus.String(self.checker_command)
2088
self.checker_command = str(value)
2089
2090
# CheckerRunning - property
2091
@dbus_service_property(_interface,
2092
signature="b",
2093
access="readwrite")
2094
def CheckerRunning_dbus_property(self, value=None):
2095
if value is None: # get
2096
return dbus.Boolean(self.checker is not None)
2097
if value:
2098
self.start_checker()
2099
else:
2100
self.stop_checker()
2101
2102
# ObjectPath - property
2103
@dbus_annotations(
2104
{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
2105
"org.freedesktop.DBus.Deprecated": "true"})
2106
@dbus_service_property(_interface, signature="o", access="read")
2107
def ObjectPath_dbus_property(self):
2108
return self.dbus_object_path # is already a dbus.ObjectPath
2109
2110
# Secret = property
2111
@dbus_annotations(
2112
{"org.freedesktop.DBus.Property.EmitsChangedSignal":
2113
"invalidates"})
2114
@dbus_service_property(_interface,
2115
signature="ay",
2116
access="write",
2117
byte_arrays=True)
2118
def Secret_dbus_property(self, value):
2119
self.secret = bytes(value)
587
2120
588
2121
del _interface
589
2122
590
2123
591
def peer_certificate(session):
592
"Return the peer's OpenPGP certificate as a bytestring"
593
# If not an OpenPGP certificate...
594
if (gnutls.library.functions
595
.gnutls_certificate_type_get(session._c_object)
596
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
597
# ...do the normal thing
598
return session.peer_certificate
599
list_size = ctypes.c_uint()
600
cert_list = (gnutls.library.functions
601
.gnutls_certificate_get_peers
602
(session._c_object, ctypes.byref(list_size)))
603
if list_size.value == 0:
604
return None
605
cert = cert_list[0]
606
return ctypes.string_at(cert.data, cert.size)
607
608
609
def fingerprint(openpgp):
610
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
611
# New GnuTLS "datum" with the OpenPGP public key
612
datum = (gnutls.library.types
613
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
614
ctypes.POINTER
615
(ctypes.c_ubyte)),
616
ctypes.c_uint(len(openpgp))))
617
# New empty GnuTLS certificate
618
crt = gnutls.library.types.gnutls_openpgp_crt_t()
619
(gnutls.library.functions
620
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
621
# Import the OpenPGP public key into the certificate
622
(gnutls.library.functions
623
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
624
gnutls.library.constants
625
.GNUTLS_OPENPGP_FMT_RAW))
626
# Verify the self signature in the key
627
crtverify = ctypes.c_uint()
628
(gnutls.library.functions
629
.gnutls_openpgp_crt_verify_self(crt, 0, ctypes.byref(crtverify)))
630
if crtverify.value != 0:
631
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
632
raise gnutls.errors.CertificateSecurityError("Verify failed")
633
# New buffer for the fingerprint
634
buf = ctypes.create_string_buffer(20)
635
buf_len = ctypes.c_size_t()
636
# Get the fingerprint from the certificate into the buffer
637
(gnutls.library.functions
638
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
639
ctypes.byref(buf_len)))
640
# Deinit the certificate
641
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
642
# Convert the buffer to a Python bytestring
643
fpr = ctypes.string_at(buf, buf_len.value)
644
# Convert the bytestring to hexadecimal notation
645
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
646
return hex_fpr
647
648
649
class TCP_handler(SocketServer.BaseRequestHandler, object):
650
"""A TCP request handler class.
651
Instantiated by IPv6_TCPServer for each request to handle it.
2124
class ProxyClient(object):
2125
def __init__(self, child_pipe, fpr, address):
2126
self._pipe = child_pipe
2127
self._pipe.send(('init', fpr, address))
2128
if not self._pipe.recv():
2129
raise KeyError(fpr)
2130
2131
def __getattribute__(self, name):
2132
if name == '_pipe':
2133
return super(ProxyClient, self).__getattribute__(name)
2134
self._pipe.send(('getattr', name))
2135
data = self._pipe.recv()
2136
if data[0] == 'data':
2137
return data[1]
2138
if data[0] == 'function':
2139
2140
def func(*args, **kwargs):
2141
self._pipe.send(('funcall', name, args, kwargs))
2142
return self._pipe.recv()[1]
2143
2144
return func
2145
2146
def __setattr__(self, name, value):
2147
if name == '_pipe':
2148
return super(ProxyClient, self).__setattr__(name, value)
2149
self._pipe.send(('setattr', name, value))
2150
2151
2152
class ClientHandler(socketserver.BaseRequestHandler, object):
2153
"""A class to handle client connections.
2154
2155
Instantiated once for each connection to handle it.
652
2156
Note: This will run in its own forked process."""
653
2157
654
2158
def handle(self):
655
logger.info(u"TCP connection from: %s",
656
unicode(self.client_address))
657
session = (gnutls.connection
658
.ClientSession(self.request,
659
gnutls.connection
660
.X509Credentials()))
661
662
line = self.request.makefile().readline()
663
logger.debug(u"Protocol version: %r", line)
664
try:
665
if int(line.strip().split()[0]) > 1:
666
raise RuntimeError
667
except (ValueError, IndexError, RuntimeError), error:
668
logger.error(u"Unknown protocol version: %s", error)
669
return
670
671
# Note: gnutls.connection.X509Credentials is really a generic
672
# GnuTLS certificate credentials object so long as no X.509
673
# keys are added to it. Therefore, we can use it here despite
674
# using OpenPGP certificates.
675
676
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
677
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
678
# "+DHE-DSS"))
679
# Use a fallback default, since this MUST be set.
680
priority = self.server.settings.get("priority", "NORMAL")
681
(gnutls.library.functions
682
.gnutls_priority_set_direct(session._c_object,
683
priority, None))
684
685
try:
686
session.handshake()
687
except gnutls.errors.GNUTLSError, error:
688
logger.warning(u"Handshake failed: %s", error)
689
# Do not run session.bye() here: the session is not
690
# established. Just abandon the request.
691
return
692
try:
693
fpr = fingerprint(peer_certificate(session))
694
except (TypeError, gnutls.errors.GNUTLSError), error:
695
logger.warning(u"Bad certificate: %s", error)
696
session.bye()
697
return
698
logger.debug(u"Fingerprint: %s", fpr)
699
for c in self.server.clients:
700
if c.fingerprint == fpr:
701
client = c
702
break
703
else:
704
logger.warning(u"Client not found for fingerprint: %s",
705
fpr)
706
session.bye()
707
return
708
# Have to check if client.still_valid(), since it is possible
709
# that the client timed out while establishing the GnuTLS
710
# session.
711
if not client.still_valid():
712
logger.warning(u"Client %(name)s is invalid",
713
vars(client))
714
session.bye()
715
return
716
## This won't work here, since we're in a fork.
717
# client.bump_timeout()
718
sent_size = 0
719
while sent_size < len(client.secret):
720
sent = session.send(client.secret[sent_size:])
721
logger.debug(u"Sent: %d, remaining: %d",
722
sent, len(client.secret)
723
- (sent_size + sent))
724
sent_size += sent
725
session.bye()
726
727
728
class IPv6_TCPServer(SocketServer.ForkingMixIn,
729
SocketServer.TCPServer, object):
730
"""IPv6 TCP server. Accepts 'None' as address and/or port.
2159
with contextlib.closing(self.server.child_pipe) as child_pipe:
2160
logger.info("TCP connection from: %s",
2161
str(self.client_address))
2162
logger.debug("Pipe FD: %d",
2163
self.server.child_pipe.fileno())
2164
2165
session = gnutls.ClientSession(self.request)
2166
2167
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
2168
# "+AES-256-CBC", "+SHA1",
2169
# "+COMP-NULL", "+CTYPE-OPENPGP",
2170
# "+DHE-DSS"))
2171
# Use a fallback default, since this MUST be set.
2172
priority = self.server.gnutls_priority
2173
if priority is None:
2174
priority = "NORMAL"
2175
gnutls.priority_set_direct(session._c_object, priority,
2176
None)
2177
2178
# Start communication using the Mandos protocol
2179
# Get protocol number
2180
line = self.request.makefile().readline()
2181
logger.debug("Protocol version: %r", line)
2182
try:
2183
if int(line.strip().split()[0]) > 1:
2184
raise RuntimeError(line)
2185
except (ValueError, IndexError, RuntimeError) as error:
2186
logger.error("Unknown protocol version: %s", error)
2187
return
2188
2189
# Start GnuTLS connection
2190
try:
2191
session.handshake()
2192
except gnutls.Error as error:
2193
logger.warning("Handshake failed: %s", error)
2194
# Do not run session.bye() here: the session is not
2195
# established. Just abandon the request.
2196
return
2197
logger.debug("Handshake succeeded")
2198
2199
approval_required = False
2200
try:
2201
try:
2202
fpr = self.fingerprint(
2203
self.peer_certificate(session))
2204
except (TypeError, gnutls.Error) as error:
2205
logger.warning("Bad certificate: %s", error)
2206
return
2207
logger.debug("Fingerprint: %s", fpr)
2208
2209
try:
2210
client = ProxyClient(child_pipe, fpr,
2211
self.client_address)
2212
except KeyError:
2213
return
2214
2215
if client.approval_delay:
2216
delay = client.approval_delay
2217
client.approvals_pending += 1
2218
approval_required = True
2219
2220
while True:
2221
if not client.enabled:
2222
logger.info("Client %s is disabled",
2223
client.name)
2224
if self.server.use_dbus:
2225
# Emit D-Bus signal
2226
client.Rejected("Disabled")
2227
return
2228
2229
if client.approved or not client.approval_delay:
2230
#We are approved or approval is disabled
2231
break
2232
elif client.approved is None:
2233
logger.info("Client %s needs approval",
2234
client.name)
2235
if self.server.use_dbus:
2236
# Emit D-Bus signal
2237
client.NeedApproval(
2238
client.approval_delay.total_seconds()
2239
* 1000, client.approved_by_default)
2240
else:
2241
logger.warning("Client %s was not approved",
2242
client.name)
2243
if self.server.use_dbus:
2244
# Emit D-Bus signal
2245
client.Rejected("Denied")
2246
return
2247
2248
#wait until timeout or approved
2249
time = datetime.datetime.now()
2250
client.changedstate.acquire()
2251
client.changedstate.wait(delay.total_seconds())
2252
client.changedstate.release()
2253
time2 = datetime.datetime.now()
2254
if (time2 - time) >= delay:
2255
if not client.approved_by_default:
2256
logger.warning("Client %s timed out while"
2257
" waiting for approval",
2258
client.name)
2259
if self.server.use_dbus:
2260
# Emit D-Bus signal
2261
client.Rejected("Approval timed out")
2262
return
2263
else:
2264
break
2265
else:
2266
delay -= time2 - time
2267
2268
try:
2269
session.send(client.secret)
2270
except gnutls.Error as error:
2271
logger.warning("gnutls send failed",
2272
exc_info = error)
2273
return
2274
2275
logger.info("Sending secret to %s", client.name)
2276
# bump the timeout using extended_timeout
2277
client.bump_timeout(client.extended_timeout)
2278
if self.server.use_dbus:
2279
# Emit D-Bus signal
2280
client.GotSecret()
2281
2282
finally:
2283
if approval_required:
2284
client.approvals_pending -= 1
2285
try:
2286
session.bye()
2287
except gnutls.Error as error:
2288
logger.warning("GnuTLS bye failed",
2289
exc_info=error)
2290
2291
@staticmethod
2292
def peer_certificate(session):
2293
"Return the peer's OpenPGP certificate as a bytestring"
2294
# If not an OpenPGP certificate...
2295
if (gnutls.certificate_type_get(session._c_object)
2296
!= gnutls.CRT_OPENPGP):
2297
# ...return invalid data
2298
return b""
2299
list_size = ctypes.c_uint(1)
2300
cert_list = (gnutls.certificate_get_peers
2301
(session._c_object, ctypes.byref(list_size)))
2302
if not bool(cert_list) and list_size.value != 0:
2303
raise gnutls.Error("error getting peer certificate")
2304
if list_size.value == 0:
2305
return None
2306
cert = cert_list[0]
2307
return ctypes.string_at(cert.data, cert.size)
2308
2309
@staticmethod
2310
def fingerprint(openpgp):
2311
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
2312
# New GnuTLS "datum" with the OpenPGP public key
2313
datum = gnutls.datum_t(
2314
ctypes.cast(ctypes.c_char_p(openpgp),
2315
ctypes.POINTER(ctypes.c_ubyte)),
2316
ctypes.c_uint(len(openpgp)))
2317
# New empty GnuTLS certificate
2318
crt = gnutls.openpgp_crt_t()
2319
gnutls.openpgp_crt_init(ctypes.byref(crt))
2320
# Import the OpenPGP public key into the certificate
2321
gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2322
gnutls.OPENPGP_FMT_RAW)
2323
# Verify the self signature in the key
2324
crtverify = ctypes.c_uint()
2325
gnutls.openpgp_crt_verify_self(crt, 0,
2326
ctypes.byref(crtverify))
2327
if crtverify.value != 0:
2328
gnutls.openpgp_crt_deinit(crt)
2329
raise gnutls.CertificateSecurityError("Verify failed")
2330
# New buffer for the fingerprint
2331
buf = ctypes.create_string_buffer(20)
2332
buf_len = ctypes.c_size_t()
2333
# Get the fingerprint from the certificate into the buffer
2334
gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2335
ctypes.byref(buf_len))
2336
# Deinit the certificate
2337
gnutls.openpgp_crt_deinit(crt)
2338
# Convert the buffer to a Python bytestring
2339
fpr = ctypes.string_at(buf, buf_len.value)
2340
# Convert the bytestring to hexadecimal notation
2341
hex_fpr = binascii.hexlify(fpr).upper()
2342
return hex_fpr
2343
2344
2345
class MultiprocessingMixIn(object):
2346
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
2347
2348
def sub_process_main(self, request, address):
2349
try:
2350
self.finish_request(request, address)
2351
except Exception:
2352
self.handle_error(request, address)
2353
self.close_request(request)
2354
2355
def process_request(self, request, address):
2356
"""Start a new process to process the request."""
2357
proc = multiprocessing.Process(target = self.sub_process_main,
2358
args = (request, address))
2359
proc.start()
2360
return proc
2361
2362
2363
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
2364
""" adds a pipe to the MixIn """
2365
2366
def process_request(self, request, client_address):
2367
"""Overrides and wraps the original process_request().
2368
2369
This function creates a new pipe in self.pipe
2370
"""
2371
parent_pipe, self.child_pipe = multiprocessing.Pipe()
2372
2373
proc = MultiprocessingMixIn.process_request(self, request,
2374
client_address)
2375
self.child_pipe.close()
2376
self.add_pipe(parent_pipe, proc)
2377
2378
def add_pipe(self, parent_pipe, proc):
2379
"""Dummy function; override as necessary"""
2380
raise NotImplementedError()
2381
2382
2383
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
2384
socketserver.TCPServer, object):
2385
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
2386
731
2387
Attributes:
732
settings: Server settings
733
clients: Set() of Client objects
734
2388
enabled: Boolean; whether this server is activated yet
2389
interface: None or a network interface name (string)
2390
use_ipv6: Boolean; to use IPv6 or not
735
2391
"""
736
address_family = socket.AF_INET6
737
def __init__(self, *args, **kwargs):
738
if "settings" in kwargs:
739
self.settings = kwargs["settings"]
740
del kwargs["settings"]
741
if "clients" in kwargs:
742
self.clients = kwargs["clients"]
743
del kwargs["clients"]
744
self.enabled = False
745
super(IPv6_TCPServer, self).__init__(*args, **kwargs)
2392
2393
def __init__(self, server_address, RequestHandlerClass,
2394
interface=None,
2395
use_ipv6=True,
2396
socketfd=None):
2397
"""If socketfd is set, use that file descriptor instead of
2398
creating a new one with socket.socket().
2399
"""
2400
self.interface = interface
2401
if use_ipv6:
2402
self.address_family = socket.AF_INET6
2403
if socketfd is not None:
2404
# Save the file descriptor
2405
self.socketfd = socketfd
2406
# Save the original socket.socket() function
2407
self.socket_socket = socket.socket
2408
# To implement --socket, we monkey patch socket.socket.
2409
#
2410
# (When socketserver.TCPServer is a new-style class, we
2411
# could make self.socket into a property instead of monkey
2412
# patching socket.socket.)
2413
#
2414
# Create a one-time-only replacement for socket.socket()
2415
@functools.wraps(socket.socket)
2416
def socket_wrapper(*args, **kwargs):
2417
# Restore original function so subsequent calls are
2418
# not affected.
2419
socket.socket = self.socket_socket
2420
del self.socket_socket
2421
# This time only, return a new socket object from the
2422
# saved file descriptor.
2423
return socket.fromfd(self.socketfd, *args, **kwargs)
2424
# Replace socket.socket() function with wrapper
2425
socket.socket = socket_wrapper
2426
# The socketserver.TCPServer.__init__ will call
2427
# socket.socket(), which might be our replacement,
2428
# socket_wrapper(), if socketfd was set.
2429
socketserver.TCPServer.__init__(self, server_address,
2430
RequestHandlerClass)
2431
746
2432
def server_bind(self):
747
2433
"""This overrides the normal server_bind() function
748
2434
to bind to an interface if one was specified, and also NOT to
749
2435
bind to an address or port if they were not specified."""
750
if self.settings["interface"]:
751
# 25 is from /usr/include/asm-i486/socket.h
752
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
753
try:
754
self.socket.setsockopt(socket.SOL_SOCKET,
755
SO_BINDTODEVICE,
756
self.settings["interface"])
757
except socket.error, error:
758
if error[0] == errno.EPERM:
759
logger.error(u"No permission to"
760
u" bind to interface %s",
761
self.settings["interface"])
762
else:
763
raise error
2436
if self.interface is not None:
2437
if SO_BINDTODEVICE is None:
2438
logger.error("SO_BINDTODEVICE does not exist;"
2439
" cannot bind to interface %s",
2440
self.interface)
2441
else:
2442
try:
2443
self.socket.setsockopt(
2444
socket.SOL_SOCKET, SO_BINDTODEVICE,
2445
(self.interface + "\0").encode("utf-8"))
2446
except socket.error as error:
2447
if error.errno == errno.EPERM:
2448
logger.error("No permission to bind to"
2449
" interface %s", self.interface)
2450
elif error.errno == errno.ENOPROTOOPT:
2451
logger.error("SO_BINDTODEVICE not available;"
2452
" cannot bind to interface %s",
2453
self.interface)
2454
elif error.errno == errno.ENODEV:
2455
logger.error("Interface %s does not exist,"
2456
" cannot bind", self.interface)
2457
else:
2458
raise
764
2459
# Only bind(2) the socket if we really need to.
765
2460
if self.server_address[0] or self.server_address[1]:
766
2461
if not self.server_address[0]:
767
in6addr_any = "::"
768
self.server_address = (in6addr_any,
2462
if self.address_family == socket.AF_INET6:
2463
any_address = "::" # in6addr_any
2464
else:
2465
any_address = "0.0.0.0" # INADDR_ANY
2466
self.server_address = (any_address,
769
2467
self.server_address[1])
770
2468
elif not self.server_address[1]:
771
self.server_address = (self.server_address[0],
772
0)
773
# if self.settings["interface"]:
2469
self.server_address = (self.server_address[0], 0)
2470
# if self.interface:
774
2471
# self.server_address = (self.server_address[0],
775
2472
# 0, # port
776
2473
# 0, # flowinfo
777
2474
# if_nametoindex
778
# (self.settings
779
# ["interface"]))
780
return super(IPv6_TCPServer, self).server_bind()
2475
# (self.interface))
2476
return socketserver.TCPServer.server_bind(self)
2477
2478
2479
class MandosServer(IPv6_TCPServer):
2480
"""Mandos server.
2481
2482
Attributes:
2483
clients: set of Client objects
2484
gnutls_priority GnuTLS priority string
2485
use_dbus: Boolean; to emit D-Bus signals or not
2486
2487
Assumes a GLib.MainLoop event loop.
2488
"""
2489
2490
def __init__(self, server_address, RequestHandlerClass,
2491
interface=None,
2492
use_ipv6=True,
2493
clients=None,
2494
gnutls_priority=None,
2495
use_dbus=True,
2496
socketfd=None):
2497
self.enabled = False
2498
self.clients = clients
2499
if self.clients is None:
2500
self.clients = {}
2501
self.use_dbus = use_dbus
2502
self.gnutls_priority = gnutls_priority
2503
IPv6_TCPServer.__init__(self, server_address,
2504
RequestHandlerClass,
2505
interface = interface,
2506
use_ipv6 = use_ipv6,
2507
socketfd = socketfd)
2508
781
2509
def server_activate(self):
782
2510
if self.enabled:
783
return super(IPv6_TCPServer, self).server_activate()
2511
return socketserver.TCPServer.server_activate(self)
2512
784
2513
def enable(self):
785
2514
self.enabled = True
2515
2516
def add_pipe(self, parent_pipe, proc):
2517
# Call "handle_ipc" for both data and EOF events
2518
GLib.io_add_watch(
2519
parent_pipe.fileno(),
2520
GLib.IO_IN | GLib.IO_HUP,
2521
functools.partial(self.handle_ipc,
2522
parent_pipe = parent_pipe,
2523
proc = proc))
2524
2525
def handle_ipc(self, source, condition,
2526
parent_pipe=None,
2527
proc = None,
2528
client_object=None):
2529
# error, or the other end of multiprocessing.Pipe has closed
2530
if condition & (GLib.IO_ERR | GLib.IO_HUP):
2531
# Wait for other process to exit
2532
proc.join()
2533
return False
2534
2535
# Read a request from the child
2536
request = parent_pipe.recv()
2537
command = request[0]
2538
2539
if command == 'init':
2540
fpr = request[1]
2541
address = request[2]
2542
2543
for c in self.clients.values():
2544
if c.fingerprint == fpr:
2545
client = c
2546
break
2547
else:
2548
logger.info("Client not found for fingerprint: %s, ad"
2549
"dress: %s", fpr, address)
2550
if self.use_dbus:
2551
# Emit D-Bus signal
2552
mandos_dbus_service.ClientNotFound(fpr,
2553
address[0])
2554
parent_pipe.send(False)
2555
return False
2556
2557
GLib.io_add_watch(
2558
parent_pipe.fileno(),
2559
GLib.IO_IN | GLib.IO_HUP,
2560
functools.partial(self.handle_ipc,
2561
parent_pipe = parent_pipe,
2562
proc = proc,
2563
client_object = client))
2564
parent_pipe.send(True)
2565
# remove the old hook in favor of the new above hook on
2566
# same fileno
2567
return False
2568
if command == 'funcall':
2569
funcname = request[1]
2570
args = request[2]
2571
kwargs = request[3]
2572
2573
parent_pipe.send(('data', getattr(client_object,
2574
funcname)(*args,
2575
**kwargs)))
2576
2577
if command == 'getattr':
2578
attrname = request[1]
2579
if isinstance(client_object.__getattribute__(attrname),
2580
collections.Callable):
2581
parent_pipe.send(('function', ))
2582
else:
2583
parent_pipe.send((
2584
'data', client_object.__getattribute__(attrname)))
2585
2586
if command == 'setattr':
2587
attrname = request[1]
2588
value = request[2]
2589
setattr(client_object, attrname, value)
2590
2591
return True
2592
2593
2594
def rfc3339_duration_to_delta(duration):
2595
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2596
2597
>>> rfc3339_duration_to_delta("P7D")
2598
datetime.timedelta(7)
2599
>>> rfc3339_duration_to_delta("PT60S")
2600
datetime.timedelta(0, 60)
2601
>>> rfc3339_duration_to_delta("PT60M")
2602
datetime.timedelta(0, 3600)
2603
>>> rfc3339_duration_to_delta("PT24H")
2604
datetime.timedelta(1)
2605
>>> rfc3339_duration_to_delta("P1W")
2606
datetime.timedelta(7)
2607
>>> rfc3339_duration_to_delta("PT5M30S")
2608
datetime.timedelta(0, 330)
2609
>>> rfc3339_duration_to_delta("P1DT3M20S")
2610
datetime.timedelta(1, 200)
2611
"""
2612
2613
# Parsing an RFC 3339 duration with regular expressions is not
2614
# possible - there would have to be multiple places for the same
2615
# values, like seconds. The current code, while more esoteric, is
2616
# cleaner without depending on a parsing library. If Python had a
2617
# built-in library for parsing we would use it, but we'd like to
2618
# avoid excessive use of external libraries.
2619
2620
# New type for defining tokens, syntax, and semantics all-in-one
2621
Token = collections.namedtuple("Token", (
2622
"regexp", # To match token; if "value" is not None, must have
2623
# a "group" containing digits
2624
"value", # datetime.timedelta or None
2625
"followers")) # Tokens valid after this token
2626
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2627
# the "duration" ABNF definition in RFC 3339, Appendix A.
2628
token_end = Token(re.compile(r"$"), None, frozenset())
2629
token_second = Token(re.compile(r"(\d+)S"),
2630
datetime.timedelta(seconds=1),
2631
frozenset((token_end, )))
2632
token_minute = Token(re.compile(r"(\d+)M"),
2633
datetime.timedelta(minutes=1),
2634
frozenset((token_second, token_end)))
2635
token_hour = Token(re.compile(r"(\d+)H"),
2636
datetime.timedelta(hours=1),
2637
frozenset((token_minute, token_end)))
2638
token_time = Token(re.compile(r"T"),
2639
None,
2640
frozenset((token_hour, token_minute,
2641
token_second)))
2642
token_day = Token(re.compile(r"(\d+)D"),
2643
datetime.timedelta(days=1),
2644
frozenset((token_time, token_end)))
2645
token_month = Token(re.compile(r"(\d+)M"),
2646
datetime.timedelta(weeks=4),
2647
frozenset((token_day, token_end)))
2648
token_year = Token(re.compile(r"(\d+)Y"),
2649
datetime.timedelta(weeks=52),
2650
frozenset((token_month, token_end)))
2651
token_week = Token(re.compile(r"(\d+)W"),
2652
datetime.timedelta(weeks=1),
2653
frozenset((token_end, )))
2654
token_duration = Token(re.compile(r"P"), None,
2655
frozenset((token_year, token_month,
2656
token_day, token_time,
2657
token_week)))
2658
# Define starting values
2659
value = datetime.timedelta() # Value so far
2660
found_token = None
2661
followers = frozenset((token_duration, )) # Following valid tokens
2662
s = duration # String left to parse
2663
# Loop until end token is found
2664
while found_token is not token_end:
2665
# Search for any currently valid tokens
2666
for token in followers:
2667
match = token.regexp.match(s)
2668
if match is not None:
2669
# Token found
2670
if token.value is not None:
2671
# Value found, parse digits
2672
factor = int(match.group(1), 10)
2673
# Add to value so far
2674
value += factor * token.value
2675
# Strip token from string
2676
s = token.regexp.sub("", s, 1)
2677
# Go to found token
2678
found_token = token
2679
# Set valid next tokens
2680
followers = found_token.followers
2681
break
2682
else:
2683
# No currently valid tokens were found
2684
raise ValueError("Invalid RFC 3339 duration: {!r}"
2685
.format(duration))
2686
# End token found
2687
return value
786
2688
787
2689
788
2690
def string_to_delta(interval):
789
2691
"""Parse a string and return a datetime.timedelta
790
2692
791
2693
>>> string_to_delta('7d')
792
2694
datetime.timedelta(7)
793
2695
>>> string_to_delta('60s')
796
2698
datetime.timedelta(0, 3600)
797
2699
>>> string_to_delta('24h')
798
2700
datetime.timedelta(1)
799
>>> string_to_delta(u'1w')
2701
>>> string_to_delta('1w')
800
2702
datetime.timedelta(7)
801
2703
>>> string_to_delta('5m 30s')
802
2704
datetime.timedelta(0, 330)
803
2705
"""
2706
2707
try:
2708
return rfc3339_duration_to_delta(interval)
2709
except ValueError:
2710
pass
2711
804
2712
timevalue = datetime.timedelta(0)
805
2713
for s in interval.split():
806
2714
try:
807
suffix = unicode(s[-1])
2715
suffix = s[-1]
808
2716
value = int(s[:-1])
809
if suffix == u"d":
2717
if suffix == "d":
810
2718
delta = datetime.timedelta(value)
811
elif suffix == u"s":
2719
elif suffix == "s":
812
2720
delta = datetime.timedelta(0, value)
813
elif suffix == u"m":
2721
elif suffix == "m":
814
2722
delta = datetime.timedelta(0, 0, 0, 0, value)
815
elif suffix == u"h":
2723
elif suffix == "h":
816
2724
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
817
elif suffix == u"w":
2725
elif suffix == "w":
818
2726
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
819
2727
else:
820
raise ValueError
821
except (ValueError, IndexError):
822
raise ValueError
2728
raise ValueError("Unknown suffix {!r}".format(suffix))
2729
except IndexError as e:
2730
raise ValueError(*(e.args))
823
2731
timevalue += delta
824
2732
return timevalue
825
2733
826
2734
827
def server_state_changed(state):
828
"""Derived from the Avahi example code"""
829
if state == avahi.SERVER_COLLISION:
830
logger.error(u"Zeroconf server name collision")
831
service.remove()
832
elif state == avahi.SERVER_RUNNING:
833
service.add()
834
835
836
def entry_group_state_changed(state, error):
837
"""Derived from the Avahi example code"""
838
logger.debug(u"Avahi state change: %i", state)
839
840
if state == avahi.ENTRY_GROUP_ESTABLISHED:
841
logger.debug(u"Zeroconf service established.")
842
elif state == avahi.ENTRY_GROUP_COLLISION:
843
logger.warning(u"Zeroconf service name collision.")
844
service.rename()
845
elif state == avahi.ENTRY_GROUP_FAILURE:
846
logger.critical(u"Avahi: Error in group state changed %s",
847
unicode(error))
848
raise AvahiGroupError("State changed: %s", str(error))
849
850
def if_nametoindex(interface):
851
"""Call the C function if_nametoindex(), or equivalent"""
852
global if_nametoindex
853
try:
854
if_nametoindex = (ctypes.cdll.LoadLibrary
855
(ctypes.util.find_library("c"))
856
.if_nametoindex)
857
except (OSError, AttributeError):
858
if "struct" not in sys.modules:
859
import struct
860
if "fcntl" not in sys.modules:
861
import fcntl
862
def if_nametoindex(interface):
863
"Get an interface index the hard way, i.e. using fcntl()"
864
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
865
with closing(socket.socket()) as s:
866
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
867
struct.pack("16s16x", interface))
868
interface_index = struct.unpack("I", ifreq[16:20])[0]
869
return interface_index
870
return if_nametoindex(interface)
871
872
873
2735
def daemon(nochdir = False, noclose = False):
874
2736
"""See daemon(3). Standard BSD Unix function.
2737
875
2738
This should really exist as os.daemon, but it doesn't (yet)."""
876
2739
if os.fork():
877
2740
sys.exit()
882
2745
sys.exit()
883
2746
if not noclose:
884
2747
# Close all standard open file descriptors
885
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2748
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
886
2749
if not stat.S_ISCHR(os.fstat(null).st_mode):
887
2750
raise OSError(errno.ENODEV,
888
"/dev/null not a character device")
2751
"{} not a character device"
2752
.format(os.devnull))
889
2753
os.dup2(null, sys.stdin.fileno())
890
2754
os.dup2(null, sys.stdout.fileno())
891
2755
os.dup2(null, sys.stderr.fileno())
894
2758
895
2759
896
2760
def main():
897
parser = OptionParser(version = "%%prog %s" % version)
898
parser.add_option("-i", "--interface", type="string",
899
metavar="IF", help="Bind to interface IF")
900
parser.add_option("-a", "--address", type="string",
901
help="Address to listen for requests on")
902
parser.add_option("-p", "--port", type="int",
903
help="Port number to receive requests on")
904
parser.add_option("--check", action="store_true", default=False,
905
help="Run self-test")
906
parser.add_option("--debug", action="store_true",
907
help="Debug mode; run in foreground and log to"
908
" terminal")
909
parser.add_option("--priority", type="string", help="GnuTLS"
910
" priority string (see GnuTLS documentation)")
911
parser.add_option("--servicename", type="string", metavar="NAME",
912
help="Zeroconf service name")
913
parser.add_option("--configdir", type="string",
914
default="/etc/mandos", metavar="DIR",
915
help="Directory to search for configuration"
916
" files")
917
options = parser.parse_args()[0]
2761
2762
##################################################################
2763
# Parsing of options, both command line and config file
2764
2765
parser = argparse.ArgumentParser()
2766
parser.add_argument("-v", "--version", action="version",
2767
version = "%(prog)s {}".format(version),
2768
help="show version number and exit")
2769
parser.add_argument("-i", "--interface", metavar="IF",
2770
help="Bind to interface IF")
2771
parser.add_argument("-a", "--address",
2772
help="Address to listen for requests on")
2773
parser.add_argument("-p", "--port", type=int,
2774
help="Port number to receive requests on")
2775
parser.add_argument("--check", action="store_true",
2776
help="Run self-test")
2777
parser.add_argument("--debug", action="store_true",
2778
help="Debug mode; run in foreground and log"
2779
" to terminal", default=None)
2780
parser.add_argument("--debuglevel", metavar="LEVEL",
2781
help="Debug level for stdout output")
2782
parser.add_argument("--priority", help="GnuTLS"
2783
" priority string (see GnuTLS documentation)")
2784
parser.add_argument("--servicename",
2785
metavar="NAME", help="Zeroconf service name")
2786
parser.add_argument("--configdir",
2787
default="/etc/mandos", metavar="DIR",
2788
help="Directory to search for configuration"
2789
" files")
2790
parser.add_argument("--no-dbus", action="store_false",
2791
dest="use_dbus", help="Do not provide D-Bus"
2792
" system bus interface", default=None)
2793
parser.add_argument("--no-ipv6", action="store_false",
2794
dest="use_ipv6", help="Do not use IPv6",
2795
default=None)
2796
parser.add_argument("--no-restore", action="store_false",
2797
dest="restore", help="Do not restore stored"
2798
" state", default=None)
2799
parser.add_argument("--socket", type=int,
2800
help="Specify a file descriptor to a network"
2801
" socket to use instead of creating one")
2802
parser.add_argument("--statedir", metavar="DIR",
2803
help="Directory to save/restore state in")
2804
parser.add_argument("--foreground", action="store_true",
2805
help="Run in foreground", default=None)
2806
parser.add_argument("--no-zeroconf", action="store_false",
2807
dest="zeroconf", help="Do not use Zeroconf",
2808
default=None)
2809
2810
options = parser.parse_args()
918
2811
919
2812
if options.check:
920
2813
import doctest
921
doctest.testmod()
922
sys.exit()
2814
fail_count, test_count = doctest.testmod()
2815
sys.exit(os.EX_OK if fail_count == 0 else 1)
923
2816
924
2817
# Default values for config file for server-global settings
925
2818
server_defaults = { "interface": "",
927
2820
"port": "",
928
2821
"debug": "False",
929
2822
"priority":
930
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2823
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2824
":+SIGN-DSA-SHA256",
931
2825
"servicename": "Mandos",
932
}
2826
"use_dbus": "True",
2827
"use_ipv6": "True",
2828
"debuglevel": "",
2829
"restore": "True",
2830
"socket": "",
2831
"statedir": "/var/lib/mandos",
2832
"foreground": "False",
2833
"zeroconf": "True",
2834
}
933
2835
934
2836
# Parse config file for server-global settings
935
server_config = ConfigParser.SafeConfigParser(server_defaults)
2837
server_config = configparser.SafeConfigParser(server_defaults)
936
2838
del server_defaults
937
2839
server_config.read(os.path.join(options.configdir, "mandos.conf"))
938
2840
# Convert the SafeConfigParser object to a dict
939
2841
server_settings = server_config.defaults()
940
# Use getboolean on the boolean config option
941
server_settings["debug"] = (server_config.getboolean
942
("DEFAULT", "debug"))
2842
# Use the appropriate methods on the non-string config options
2843
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
2844
server_settings[option] = server_config.getboolean("DEFAULT",
2845
option)
2846
if server_settings["port"]:
2847
server_settings["port"] = server_config.getint("DEFAULT",
2848
"port")
2849
if server_settings["socket"]:
2850
server_settings["socket"] = server_config.getint("DEFAULT",
2851
"socket")
2852
# Later, stdin will, and stdout and stderr might, be dup'ed
2853
# over with an opened os.devnull. But we don't want this to
2854
# happen with a supplied network socket.
2855
if 0 <= server_settings["socket"] <= 2:
2856
server_settings["socket"] = os.dup(server_settings
2857
["socket"])
943
2858
del server_config
944
2859
945
2860
# Override the settings from the config file with command line
946
2861
# options, if set.
947
2862
for option in ("interface", "address", "port", "debug",
948
"priority", "servicename", "configdir"):
2863
"priority", "servicename", "configdir", "use_dbus",
2864
"use_ipv6", "debuglevel", "restore", "statedir",
2865
"socket", "foreground", "zeroconf"):
949
2866
value = getattr(options, option)
950
2867
if value is not None:
951
2868
server_settings[option] = value
952
2869
del options
2870
# Force all strings to be unicode
2871
for option in server_settings.keys():
2872
if isinstance(server_settings[option], bytes):
2873
server_settings[option] = (server_settings[option]
2874
.decode("utf-8"))
2875
# Force all boolean options to be boolean
2876
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2877
"foreground", "zeroconf"):
2878
server_settings[option] = bool(server_settings[option])
2879
# Debug implies foreground
2880
if server_settings["debug"]:
2881
server_settings["foreground"] = True
953
2882
# Now we have our good server settings in "server_settings"
954
2883
2884
##################################################################
2885
2886
if (not server_settings["zeroconf"]
2887
and not (server_settings["port"]
2888
or server_settings["socket"] != "")):
2889
parser.error("Needs port or socket to work without Zeroconf")
2890
2891
# For convenience
955
2892
debug = server_settings["debug"]
2893
debuglevel = server_settings["debuglevel"]
2894
use_dbus = server_settings["use_dbus"]
2895
use_ipv6 = server_settings["use_ipv6"]
2896
stored_state_path = os.path.join(server_settings["statedir"],
2897
stored_state_file)
2898
foreground = server_settings["foreground"]
2899
zeroconf = server_settings["zeroconf"]
956
2900
957
if not debug:
958
syslogger.setLevel(logging.WARNING)
959
console.setLevel(logging.WARNING)
2901
if debug:
2902
initlogger(debug, logging.DEBUG)
2903
else:
2904
if not debuglevel:
2905
initlogger(debug)
2906
else:
2907
level = getattr(logging, debuglevel.upper())
2908
initlogger(debug, level)
960
2909
961
2910
if server_settings["servicename"] != "Mandos":
962
syslogger.setFormatter(logging.Formatter
963
('Mandos (%s): %%(levelname)s:'
964
' %%(message)s'
965
% server_settings["servicename"]))
2911
syslogger.setFormatter(
2912
logging.Formatter('Mandos ({}) [%(process)d]:'
2913
' %(levelname)s: %(message)s'.format(
2914
server_settings["servicename"])))
966
2915
967
2916
# Parse config file with clients
968
client_defaults = { "timeout": "1h",
969
"interval": "5m",
970
"checker": "fping -q -- %(host)s",
971
"host": "",
972
}
973
client_config = ConfigParser.SafeConfigParser(client_defaults)
2917
client_config = configparser.SafeConfigParser(Client
2918
.client_defaults)
974
2919
client_config.read(os.path.join(server_settings["configdir"],
975
2920
"clients.conf"))
976
2921
977
clients = Set()
978
tcp_server = IPv6_TCPServer((server_settings["address"],
979
server_settings["port"]),
980
TCP_handler,
981
settings=server_settings,
982
clients=clients)
983
pidfilename = "/var/run/mandos.pid"
984
try:
985
pidfile = open(pidfilename, "w")
986
except IOError, error:
987
logger.error("Could not open file %r", pidfilename)
988
989
try:
990
uid = pwd.getpwnam("_mandos").pw_uid
991
except KeyError:
992
try:
993
uid = pwd.getpwnam("mandos").pw_uid
994
except KeyError:
995
try:
996
uid = pwd.getpwnam("nobody").pw_uid
997
except KeyError:
998
uid = 65534
999
try:
1000
gid = pwd.getpwnam("_mandos").pw_gid
1001
except KeyError:
1002
try:
1003
gid = pwd.getpwnam("mandos").pw_gid
1004
except KeyError:
1005
try:
1006
gid = pwd.getpwnam("nogroup").pw_gid
1007
except KeyError:
1008
gid = 65534
1009
try:
2922
global mandos_dbus_service
2923
mandos_dbus_service = None
2924
2925
socketfd = None
2926
if server_settings["socket"] != "":
2927
socketfd = server_settings["socket"]
2928
tcp_server = MandosServer(
2929
(server_settings["address"], server_settings["port"]),
2930
ClientHandler,
2931
interface=(server_settings["interface"] or None),
2932
use_ipv6=use_ipv6,
2933
gnutls_priority=server_settings["priority"],
2934
use_dbus=use_dbus,
2935
socketfd=socketfd)
2936
if not foreground:
2937
pidfilename = "/run/mandos.pid"
2938
if not os.path.isdir("/run/."):
2939
pidfilename = "/var/run/mandos.pid"
2940
pidfile = None
2941
try:
2942
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
2943
except IOError as e:
2944
logger.error("Could not open file %r", pidfilename,
2945
exc_info=e)
2946
2947
for name, group in (("_mandos", "_mandos"),
2948
("mandos", "mandos"),
2949
("nobody", "nogroup")):
2950
try:
2951
uid = pwd.getpwnam(name).pw_uid
2952
gid = pwd.getpwnam(group).pw_gid
2953
break
2954
except KeyError:
2955
continue
2956
else:
2957
uid = 65534
2958
gid = 65534
2959
try:
2960
os.setgid(gid)
1010
2961
os.setuid(uid)
1011
os.setgid(gid)
1012
except OSError, error:
1013
if error[0] != errno.EPERM:
1014
raise error
1015
1016
global service
1017
service = AvahiService(name = server_settings["servicename"],
1018
servicetype = "_mandos._tcp", )
1019
if server_settings["interface"]:
1020
service.interface = (if_nametoindex
1021
(server_settings["interface"]))
2962
if debug:
2963
logger.debug("Did setuid/setgid to {}:{}".format(uid,
2964
gid))
2965
except OSError as error:
2966
logger.warning("Failed to setuid/setgid to {}:{}: {}"
2967
.format(uid, gid, os.strerror(error.errno)))
2968
if error.errno != errno.EPERM:
2969
raise
2970
2971
if debug:
2972
# Enable all possible GnuTLS debugging
2973
2974
# "Use a log level over 10 to enable all debugging options."
2975
# - GnuTLS manual
2976
gnutls.global_set_log_level(11)
2977
2978
@gnutls.log_func
2979
def debug_gnutls(level, string):
2980
logger.debug("GnuTLS: %s", string[:-1])
2981
2982
gnutls.global_set_log_function(debug_gnutls)
2983
2984
# Redirect stdin so all checkers get /dev/null
2985
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2986
os.dup2(null, sys.stdin.fileno())
2987
if null > 2:
2988
os.close(null)
2989
2990
# Need to fork before connecting to D-Bus
2991
if not foreground:
2992
# Close all input and output, do double fork, etc.
2993
daemon()
2994
2995
# multiprocessing will use threads, so before we use GLib we need
2996
# to inform GLib that threads will be used.
2997
GLib.threads_init()
1022
2998
1023
2999
global main_loop
1024
global bus
1025
global server
1026
3000
# From the Avahi example code
1027
DBusGMainLoop(set_as_default=True )
1028
main_loop = gobject.MainLoop()
3001
DBusGMainLoop(set_as_default=True)
3002
main_loop = GLib.MainLoop()
1029
3003
bus = dbus.SystemBus()
1030
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
1031
avahi.DBUS_PATH_SERVER),
1032
avahi.DBUS_INTERFACE_SERVER)
1033
3004
# End of Avahi example code
1034
bus_name = dbus.service.BusName(u"org.mandos-system.Mandos", bus)
1035
1036
clients.update(Set(Client(name = section,
1037
config
1038
= dict(client_config.items(section)))
1039
for section in client_config.sections()))
1040
if not clients:
1041
logger.critical(u"No clients defined")
1042
sys.exit(1)
1043
1044
if debug:
1045
# Redirect stdin so all checkers get /dev/null
1046
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1047
os.dup2(null, sys.stdin.fileno())
1048
if null > 2:
1049
os.close(null)
1050
else:
1051
# No console logging
1052
logger.removeHandler(console)
1053
# Close all input and output, do double fork, etc.
1054
daemon()
1055
1056
try:
1057
pid = os.getpid()
1058
pidfile.write(str(pid) + "\n")
1059
pidfile.close()
3005
if use_dbus:
3006
try:
3007
bus_name = dbus.service.BusName("se.recompile.Mandos",
3008
bus,
3009
do_not_queue=True)
3010
old_bus_name = dbus.service.BusName(
3011
"se.bsnet.fukt.Mandos", bus,
3012
do_not_queue=True)
3013
except dbus.exceptions.DBusException as e:
3014
logger.error("Disabling D-Bus:", exc_info=e)
3015
use_dbus = False
3016
server_settings["use_dbus"] = False
3017
tcp_server.use_dbus = False
3018
if zeroconf:
3019
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3020
service = AvahiServiceToSyslog(
3021
name = server_settings["servicename"],
3022
servicetype = "_mandos._tcp",
3023
protocol = protocol,
3024
bus = bus)
3025
if server_settings["interface"]:
3026
service.interface = if_nametoindex(
3027
server_settings["interface"].encode("utf-8"))
3028
3029
global multiprocessing_manager
3030
multiprocessing_manager = multiprocessing.Manager()
3031
3032
client_class = Client
3033
if use_dbus:
3034
client_class = functools.partial(ClientDBus, bus = bus)
3035
3036
client_settings = Client.config_parser(client_config)
3037
old_client_settings = {}
3038
clients_data = {}
3039
3040
# This is used to redirect stdout and stderr for checker processes
3041
global wnull
3042
wnull = open(os.devnull, "w") # A writable /dev/null
3043
# Only used if server is running in foreground but not in debug
3044
# mode
3045
if debug or not foreground:
3046
wnull.close()
3047
3048
# Get client data and settings from last running state.
3049
if server_settings["restore"]:
3050
try:
3051
with open(stored_state_path, "rb") as stored_state:
3052
if sys.version_info.major == 2:
3053
clients_data, old_client_settings = pickle.load(
3054
stored_state)
3055
else:
3056
bytes_clients_data, bytes_old_client_settings = (
3057
pickle.load(stored_state, encoding = "bytes"))
3058
### Fix bytes to strings
3059
## clients_data
3060
# .keys()
3061
clients_data = { (key.decode("utf-8")
3062
if isinstance(key, bytes)
3063
else key): value
3064
for key, value in
3065
bytes_clients_data.items() }
3066
del bytes_clients_data
3067
for key in clients_data:
3068
value = { (k.decode("utf-8")
3069
if isinstance(k, bytes) else k): v
3070
for k, v in
3071
clients_data[key].items() }
3072
clients_data[key] = value
3073
# .client_structure
3074
value["client_structure"] = [
3075
(s.decode("utf-8")
3076
if isinstance(s, bytes)
3077
else s) for s in
3078
value["client_structure"] ]
3079
# .name & .host
3080
for k in ("name", "host"):
3081
if isinstance(value[k], bytes):
3082
value[k] = value[k].decode("utf-8")
3083
## old_client_settings
3084
# .keys()
3085
old_client_settings = {
3086
(key.decode("utf-8")
3087
if isinstance(key, bytes)
3088
else key): value
3089
for key, value in
3090
bytes_old_client_settings.items() }
3091
del bytes_old_client_settings
3092
# .host
3093
for value in old_client_settings.values():
3094
if isinstance(value["host"], bytes):
3095
value["host"] = (value["host"]
3096
.decode("utf-8"))
3097
os.remove(stored_state_path)
3098
except IOError as e:
3099
if e.errno == errno.ENOENT:
3100
logger.warning("Could not load persistent state:"
3101
" {}".format(os.strerror(e.errno)))
3102
else:
3103
logger.critical("Could not load persistent state:",
3104
exc_info=e)
3105
raise
3106
except EOFError as e:
3107
logger.warning("Could not load persistent state: "
3108
"EOFError:",
3109
exc_info=e)
3110
3111
with PGPEngine() as pgp:
3112
for client_name, client in clients_data.items():
3113
# Skip removed clients
3114
if client_name not in client_settings:
3115
continue
3116
3117
# Decide which value to use after restoring saved state.
3118
# We have three different values: Old config file,
3119
# new config file, and saved state.
3120
# New config value takes precedence if it differs from old
3121
# config value, otherwise use saved state.
3122
for name, value in client_settings[client_name].items():
3123
try:
3124
# For each value in new config, check if it
3125
# differs from the old config value (Except for
3126
# the "secret" attribute)
3127
if (name != "secret"
3128
and (value !=
3129
old_client_settings[client_name][name])):
3130
client[name] = value
3131
except KeyError:
3132
pass
3133
3134
# Clients who has passed its expire date can still be
3135
# enabled if its last checker was successful. A Client
3136
# whose checker succeeded before we stored its state is
3137
# assumed to have successfully run all checkers during
3138
# downtime.
3139
if client["enabled"]:
3140
if datetime.datetime.utcnow() >= client["expires"]:
3141
if not client["last_checked_ok"]:
3142
logger.warning(
3143
"disabling client {} - Client never "
3144
"performed a successful checker".format(
3145
client_name))
3146
client["enabled"] = False
3147
elif client["last_checker_status"] != 0:
3148
logger.warning(
3149
"disabling client {} - Client last"
3150
" checker failed with error code"
3151
" {}".format(
3152
client_name,
3153
client["last_checker_status"]))
3154
client["enabled"] = False
3155
else:
3156
client["expires"] = (
3157
datetime.datetime.utcnow()
3158
+ client["timeout"])
3159
logger.debug("Last checker succeeded,"
3160
" keeping {} enabled".format(
3161
client_name))
3162
try:
3163
client["secret"] = pgp.decrypt(
3164
client["encrypted_secret"],
3165
client_settings[client_name]["secret"])
3166
except PGPError:
3167
# If decryption fails, we use secret from new settings
3168
logger.debug("Failed to decrypt {} old secret".format(
3169
client_name))
3170
client["secret"] = (client_settings[client_name]
3171
["secret"])
3172
3173
# Add/remove clients based on new changes made to config
3174
for client_name in (set(old_client_settings)
3175
- set(client_settings)):
3176
del clients_data[client_name]
3177
for client_name in (set(client_settings)
3178
- set(old_client_settings)):
3179
clients_data[client_name] = client_settings[client_name]
3180
3181
# Create all client objects
3182
for client_name, client in clients_data.items():
3183
tcp_server.clients[client_name] = client_class(
3184
name = client_name,
3185
settings = client,
3186
server_settings = server_settings)
3187
3188
if not tcp_server.clients:
3189
logger.warning("No clients defined")
3190
3191
if not foreground:
3192
if pidfile is not None:
3193
pid = os.getpid()
3194
try:
3195
with pidfile:
3196
print(pid, file=pidfile)
3197
except IOError:
3198
logger.error("Could not write to file %r with PID %d",
3199
pidfilename, pid)
1060
3200
del pidfile
1061
except IOError:
1062
logger.error(u"Could not write to file %r with PID %d",
1063
pidfilename, pid)
1064
except NameError:
1065
# "pidfile" was never created
1066
pass
1067
del pidfilename
3201
del pidfilename
3202
3203
for termsig in (signal.SIGHUP, signal.SIGTERM):
3204
GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3205
lambda: main_loop.quit() and False)
3206
3207
if use_dbus:
3208
3209
@alternate_dbus_interfaces(
3210
{ "se.recompile.Mandos": "se.bsnet.fukt.Mandos" })
3211
class MandosDBusService(DBusObjectWithObjectManager):
3212
"""A D-Bus proxy object"""
3213
3214
def __init__(self):
3215
dbus.service.Object.__init__(self, bus, "/")
3216
3217
_interface = "se.recompile.Mandos"
3218
3219
@dbus.service.signal(_interface, signature="o")
3220
def ClientAdded(self, objpath):
3221
"D-Bus signal"
3222
pass
3223
3224
@dbus.service.signal(_interface, signature="ss")
3225
def ClientNotFound(self, fingerprint, address):
3226
"D-Bus signal"
3227
pass
3228
3229
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3230
"true"})
3231
@dbus.service.signal(_interface, signature="os")
3232
def ClientRemoved(self, objpath, name):
3233
"D-Bus signal"
3234
pass
3235
3236
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3237
"true"})
3238
@dbus.service.method(_interface, out_signature="ao")
3239
def GetAllClients(self):
3240
"D-Bus method"
3241
return dbus.Array(c.dbus_object_path for c in
3242
tcp_server.clients.values())
3243
3244
@dbus_annotations({"org.freedesktop.DBus.Deprecated":
3245
"true"})
3246
@dbus.service.method(_interface,
3247
out_signature="a{oa{sv}}")
3248
def GetAllClientsWithProperties(self):
3249
"D-Bus method"
3250
return dbus.Dictionary(
3251
{ c.dbus_object_path: c.GetAll(
3252
"se.recompile.Mandos.Client")
3253
for c in tcp_server.clients.values() },
3254
signature="oa{sv}")
3255
3256
@dbus.service.method(_interface, in_signature="o")
3257
def RemoveClient(self, object_path):
3258
"D-Bus method"
3259
for c in tcp_server.clients.values():
3260
if c.dbus_object_path == object_path:
3261
del tcp_server.clients[c.name]
3262
c.remove_from_connection()
3263
# Don't signal the disabling
3264
c.disable(quiet=True)
3265
# Emit D-Bus signal for removal
3266
self.client_removed_signal(c)
3267
return
3268
raise KeyError(object_path)
3269
3270
del _interface
3271
3272
@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3273
out_signature = "a{oa{sa{sv}}}")
3274
def GetManagedObjects(self):
3275
"""D-Bus method"""
3276
return dbus.Dictionary(
3277
{ client.dbus_object_path:
3278
dbus.Dictionary(
3279
{ interface: client.GetAll(interface)
3280
for interface in
3281
client._get_all_interface_names()})
3282
for client in tcp_server.clients.values()})
3283
3284
def client_added_signal(self, client):
3285
"""Send the new standard signal and the old signal"""
3286
if use_dbus:
3287
# New standard signal
3288
self.InterfacesAdded(
3289
client.dbus_object_path,
3290
dbus.Dictionary(
3291
{ interface: client.GetAll(interface)
3292
for interface in
3293
client._get_all_interface_names()}))
3294
# Old signal
3295
self.ClientAdded(client.dbus_object_path)
3296
3297
def client_removed_signal(self, client):
3298
"""Send the new standard signal and the old signal"""
3299
if use_dbus:
3300
# New standard signal
3301
self.InterfacesRemoved(
3302
client.dbus_object_path,
3303
client._get_all_interface_names())
3304
# Old signal
3305
self.ClientRemoved(client.dbus_object_path,
3306
client.name)
3307
3308
mandos_dbus_service = MandosDBusService()
1068
3309
1069
3310
def cleanup():
1070
3311
"Cleanup function; run on exit"
1071
global group
1072
# From the Avahi example code
1073
if not group is None:
1074
group.Free()
1075
group = None
1076
# End of Avahi example code
1077
1078
while clients:
1079
client = clients.pop()
1080
client.stop_hook = None
1081
client.stop()
3312
if zeroconf:
3313
service.cleanup()
3314
3315
multiprocessing.active_children()
3316
wnull.close()
3317
if not (tcp_server.clients or client_settings):
3318
return
3319
3320
# Store client before exiting. Secrets are encrypted with key
3321
# based on what config file has. If config file is
3322
# removed/edited, old secret will thus be unrecovable.
3323
clients = {}
3324
with PGPEngine() as pgp:
3325
for client in tcp_server.clients.values():
3326
key = client_settings[client.name]["secret"]
3327
client.encrypted_secret = pgp.encrypt(client.secret,
3328
key)
3329
client_dict = {}
3330
3331
# A list of attributes that can not be pickled
3332
# + secret.
3333
exclude = { "bus", "changedstate", "secret",
3334
"checker", "server_settings" }
3335
for name, typ in inspect.getmembers(dbus.service
3336
.Object):
3337
exclude.add(name)
3338
3339
client_dict["encrypted_secret"] = (client
3340
.encrypted_secret)
3341
for attr in client.client_structure:
3342
if attr not in exclude:
3343
client_dict[attr] = getattr(client, attr)
3344
3345
clients[client.name] = client_dict
3346
del client_settings[client.name]["secret"]
3347
3348
try:
3349
with tempfile.NamedTemporaryFile(
3350
mode='wb',
3351
suffix=".pickle",
3352
prefix='clients-',
3353
dir=os.path.dirname(stored_state_path),
3354
delete=False) as stored_state:
3355
pickle.dump((clients, client_settings), stored_state,
3356
protocol = 2)
3357
tempname = stored_state.name
3358
os.rename(tempname, stored_state_path)
3359
except (IOError, OSError) as e:
3360
if not debug:
3361
try:
3362
os.remove(tempname)
3363
except NameError:
3364
pass
3365
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
3366
logger.warning("Could not save persistent state: {}"
3367
.format(os.strerror(e.errno)))
3368
else:
3369
logger.warning("Could not save persistent state:",
3370
exc_info=e)
3371
raise
3372
3373
# Delete all clients, and settings from config
3374
while tcp_server.clients:
3375
name, client = tcp_server.clients.popitem()
3376
if use_dbus:
3377
client.remove_from_connection()
3378
# Don't signal the disabling
3379
client.disable(quiet=True)
3380
# Emit D-Bus signal for removal
3381
if use_dbus:
3382
mandos_dbus_service.client_removed_signal(client)
3383
client_settings.clear()
1082
3384
1083
3385
atexit.register(cleanup)
1084
3386
1085
if not debug:
1086
signal.signal(signal.SIGINT, signal.SIG_IGN)
1087
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1088
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1089
1090
class MandosServer(dbus.service.Object):
1091
"""A D-Bus proxy object"""
1092
def __init__(self):
1093
dbus.service.Object.__init__(self, bus,
1094
"/Mandos")
1095
_interface = u"org.mandos_system.Mandos"
1096
1097
@dbus.service.signal(_interface, signature="oa{sv}")
1098
def ClientAdded(self, objpath, properties):
1099
"D-Bus signal"
1100
pass
1101
1102
@dbus.service.signal(_interface, signature="o")
1103
def ClientRemoved(self, objpath):
1104
"D-Bus signal"
1105
pass
1106
1107
@dbus.service.method(_interface, out_signature="ao")
1108
def GetAllClients(self):
1109
return dbus.Array(c.dbus_object_path for c in clients)
1110
1111
@dbus.service.method(_interface, out_signature="a{oa{sv}}")
1112
def GetAllClientsWithProperties(self):
1113
return dbus.Dictionary(
1114
((c.dbus_object_path, c.GetAllProperties())
1115
for c in clients),
1116
signature="oa{sv}")
1117
1118
@dbus.service.method(_interface, in_signature="o")
1119
def RemoveClient(self, object_path):
1120
for c in clients:
1121
if c.dbus_object_path == object_path:
1122
c.stop()
1123
clients.remove(c)
1124
return
1125
raise KeyError
1126
1127
del _interface
1128
1129
mandos_server = MandosServer()
1130
1131
for client in clients:
1132
# Emit D-Bus signal
1133
mandos_server.ClientAdded(client.dbus_object_path,
1134
client.GetAllProperties())
1135
client.start()
3387
for client in tcp_server.clients.values():
3388
if use_dbus:
3389
# Emit D-Bus signal for adding
3390
mandos_dbus_service.client_added_signal(client)
3391
# Need to initiate checking of clients
3392
if client.enabled:
3393
client.init_checker()
1136
3394
1137
3395
tcp_server.enable()
1138
3396
tcp_server.server_activate()
1139
3397
1140
3398
# Find out what port we got
1141
service.port = tcp_server.socket.getsockname()[1]
1142
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
1143
u" scope_id %d" % tcp_server.socket.getsockname())
3399
if zeroconf:
3400
service.port = tcp_server.socket.getsockname()[1]
3401
if use_ipv6:
3402
logger.info("Now listening on address %r, port %d,"
3403
" flowinfo %d, scope_id %d",
3404
*tcp_server.socket.getsockname())
3405
else: # IPv4
3406
logger.info("Now listening on address %r, port %d",
3407
*tcp_server.socket.getsockname())
1144
3408
1145
3409
#service.interface = tcp_server.socket.getsockname()[3]
1146
3410
1147
3411
try:
1148
# From the Avahi example code
1149
server.connect_to_signal("StateChanged", server_state_changed)
1150
try:
1151
server_state_changed(server.GetState())
1152
except dbus.exceptions.DBusException, error:
1153
logger.critical(u"DBusException: %s", error)
1154
sys.exit(1)
1155
# End of Avahi example code
1156
1157
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
1158
lambda *args, **kwargs:
1159
(tcp_server.handle_request
1160
(*args[2:], **kwargs) or True))
1161
1162
logger.debug(u"Starting main loop")
3412
if zeroconf:
3413
# From the Avahi example code
3414
try:
3415
service.activate()
3416
except dbus.exceptions.DBusException as error:
3417
logger.critical("D-Bus Exception", exc_info=error)
3418
cleanup()
3419
sys.exit(1)
3420
# End of Avahi example code
3421
3422
GLib.io_add_watch(tcp_server.fileno(), GLib.IO_IN,
3423
lambda *args, **kwargs:
3424
(tcp_server.handle_request
3425
(*args[2:], **kwargs) or True))
3426
3427
logger.debug("Starting main loop")
1163
3428
main_loop.run()
1164
except AvahiError, error:
1165
logger.critical(u"AvahiError: %s" + unicode(error))
3429
except AvahiError as error:
3430
logger.critical("Avahi Error", exc_info=error)
3431
cleanup()
1166
3432
sys.exit(1)
1167
3433
except KeyboardInterrupt:
1168
3434
if debug:
1169
print
3435
print("", file=sys.stderr)
3436
logger.debug("Server received KeyboardInterrupt")
3437
logger.debug("Server exiting")
3438
# Must run before the D-Bus bus name gets deregistered
3439
cleanup()
3440
1170
3441
1171
3442
if __name__ == '__main__':
1172
3443
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0