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- Committer: Teddy Hogeborn
- Date: 2015-05-23 12:07:07 UTC
- mto: (237.7.304 trunk)
- mto: This revision was merged to the branch mainline in revision 325.
- Revision ID: teddy@recompile.se-20150523120707-t5fq0brh2kxkvw8g
mandos: Some more minor changes to prepare for Python 3.
- files added:
- .bzr-builddeb
- debian
- debian/po
- debian/source
- debian/upstream
- network-hooks.d
- files removed:
- network-protocol.txt
- files renamed:
- plugins.d/password-request.c => plugins.d/mandos-client.c
- plugins.d/password-request.xml => plugins.d/mandos-client.xml
- files modified:
- Makefile
added
removed
mandos
1
#!/usr/bin/python
1
#!/usr/bin/python2.7
2
2
# -*- mode: python; coding: utf-8 -*-
3
3
#
4
4
# Mandos server - give out binary blobs to connecting clients.
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 © 2007-2008 Teddy Hogeborn & Björn Påhlsson
14
# Copyright © 2008-2015 Teddy Hogeborn
15
# Copyright © 2008-2015 Björn Påhlsson
15
16
#
16
17
# This program is free software: you can redistribute it and/or modify
17
18
# it under the terms of the GNU General Public License as published by
24
25
# GNU General Public License for more details.
25
26
#
26
27
# You should have received a copy of the GNU General Public License
27
# along with this program. If not, see <http://www.gnu.org/licenses/>.
28
#
29
# Contact the authors at <mandos@fukt.bsnet.se>.
30
#
31
32
from __future__ import division
33
34
import SocketServer
28
# along with this program. If not, see
29
# <http://www.gnu.org/licenses/>.
30
#
31
# Contact the authors at <mandos@recompile.se>.
32
#
33
34
from __future__ import (division, absolute_import, print_function,
35
unicode_literals)
36
37
from future_builtins import *
38
39
try:
40
import SocketServer as socketserver
41
except ImportError:
42
import socketserver
35
43
import socket
36
import select
37
from optparse import OptionParser
44
import argparse
38
45
import datetime
39
46
import errno
40
47
import gnutls.crypto
43
50
import gnutls.library.functions
44
51
import gnutls.library.constants
45
52
import gnutls.library.types
46
import ConfigParser
53
try:
54
import ConfigParser as configparser
55
except ImportError:
56
import configparser
47
57
import sys
48
58
import re
49
59
import os
50
60
import signal
51
from sets import Set
52
61
import subprocess
53
62
import atexit
54
63
import stat
55
64
import logging
56
65
import logging.handlers
66
import pwd
67
import contextlib
68
import struct
69
import fcntl
70
import functools
71
try:
72
import cPickle as pickle
73
except ImportError:
74
import pickle
75
import multiprocessing
76
import types
77
import binascii
78
import tempfile
79
import itertools
80
import collections
57
81
58
82
import dbus
59
import gobject
83
import dbus.service
84
try:
85
import gobject
86
except ImportError:
87
from gi.repository import GObject as gobject
60
88
import avahi
61
89
from dbus.mainloop.glib import DBusGMainLoop
62
90
import ctypes
63
64
version = "1.0"
65
66
logger = logging.Logger('mandos')
67
syslogger = logging.handlers.SysLogHandler\
68
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
69
address = "/dev/log")
70
syslogger.setFormatter(logging.Formatter\
71
('Mandos: %(levelname)s: %(message)s'))
72
logger.addHandler(syslogger)
73
74
console = logging.StreamHandler()
75
console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
76
' %(message)s'))
77
logger.addHandler(console)
91
import ctypes.util
92
import xml.dom.minidom
93
import inspect
94
95
try:
96
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
97
except AttributeError:
98
try:
99
from IN import SO_BINDTODEVICE
100
except ImportError:
101
SO_BINDTODEVICE = None
102
103
if sys.version_info.major == 2:
104
str = unicode
105
106
version = "1.6.9"
107
stored_state_file = "clients.pickle"
108
109
logger = logging.getLogger()
110
syslogger = None
111
112
try:
113
if_nametoindex = ctypes.cdll.LoadLibrary(
114
ctypes.util.find_library("c")).if_nametoindex
115
except (OSError, AttributeError):
116
117
def if_nametoindex(interface):
118
"Get an interface index the hard way, i.e. using fcntl()"
119
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
120
with contextlib.closing(socket.socket()) as s:
121
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
122
struct.pack(b"16s16x", interface))
123
interface_index = struct.unpack("I", ifreq[16:20])[0]
124
return interface_index
125
126
127
def initlogger(debug, level=logging.WARNING):
128
"""init logger and add loglevel"""
129
130
global syslogger
131
syslogger = (logging.handlers.SysLogHandler(
132
facility = logging.handlers.SysLogHandler.LOG_DAEMON,
133
address = "/dev/log"))
134
syslogger.setFormatter(logging.Formatter
135
('Mandos [%(process)d]: %(levelname)s:'
136
' %(message)s'))
137
logger.addHandler(syslogger)
138
139
if debug:
140
console = logging.StreamHandler()
141
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
142
' [%(process)d]:'
143
' %(levelname)s:'
144
' %(message)s'))
145
logger.addHandler(console)
146
logger.setLevel(level)
147
148
149
class PGPError(Exception):
150
"""Exception if encryption/decryption fails"""
151
pass
152
153
154
class PGPEngine(object):
155
"""A simple class for OpenPGP symmetric encryption & decryption"""
156
157
def __init__(self):
158
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
159
self.gnupgargs = ['--batch',
160
'--home', self.tempdir,
161
'--force-mdc',
162
'--quiet',
163
'--no-use-agent']
164
165
def __enter__(self):
166
return self
167
168
def __exit__(self, exc_type, exc_value, traceback):
169
self._cleanup()
170
return False
171
172
def __del__(self):
173
self._cleanup()
174
175
def _cleanup(self):
176
if self.tempdir is not None:
177
# Delete contents of tempdir
178
for root, dirs, files in os.walk(self.tempdir,
179
topdown = False):
180
for filename in files:
181
os.remove(os.path.join(root, filename))
182
for dirname in dirs:
183
os.rmdir(os.path.join(root, dirname))
184
# Remove tempdir
185
os.rmdir(self.tempdir)
186
self.tempdir = None
187
188
def password_encode(self, password):
189
# Passphrase can not be empty and can not contain newlines or
190
# NUL bytes. So we prefix it and hex encode it.
191
encoded = b"mandos" + binascii.hexlify(password)
192
if len(encoded) > 2048:
193
# GnuPG can't handle long passwords, so encode differently
194
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
195
.replace(b"\n", b"\\n")
196
.replace(b"\0", b"\\x00"))
197
return encoded
198
199
def encrypt(self, data, password):
200
passphrase = self.password_encode(password)
201
with tempfile.NamedTemporaryFile(
202
dir=self.tempdir) as passfile:
203
passfile.write(passphrase)
204
passfile.flush()
205
proc = subprocess.Popen(['gpg', '--symmetric',
206
'--passphrase-file',
207
passfile.name]
208
+ self.gnupgargs,
209
stdin = subprocess.PIPE,
210
stdout = subprocess.PIPE,
211
stderr = subprocess.PIPE)
212
ciphertext, err = proc.communicate(input = data)
213
if proc.returncode != 0:
214
raise PGPError(err)
215
return ciphertext
216
217
def decrypt(self, data, password):
218
passphrase = self.password_encode(password)
219
with tempfile.NamedTemporaryFile(
220
dir = self.tempdir) as passfile:
221
passfile.write(passphrase)
222
passfile.flush()
223
proc = subprocess.Popen(['gpg', '--decrypt',
224
'--passphrase-file',
225
passfile.name]
226
+ self.gnupgargs,
227
stdin = subprocess.PIPE,
228
stdout = subprocess.PIPE,
229
stderr = subprocess.PIPE)
230
decrypted_plaintext, err = proc.communicate(input = data)
231
if proc.returncode != 0:
232
raise PGPError(err)
233
return decrypted_plaintext
234
78
235
79
236
class AvahiError(Exception):
80
def __init__(self, value):
237
def __init__(self, value, *args, **kwargs):
81
238
self.value = value
82
def __str__(self):
83
return repr(self.value)
239
return super(AvahiError, self).__init__(value, *args,
240
**kwargs)
241
84
242
85
243
class AvahiServiceError(AvahiError):
86
244
pass
87
245
246
88
247
class AvahiGroupError(AvahiError):
89
248
pass
90
249
91
250
92
251
class AvahiService(object):
93
252
"""An Avahi (Zeroconf) service.
253
94
254
Attributes:
95
255
interface: integer; avahi.IF_UNSPEC or an interface index.
96
256
Used to optionally bind to the specified interface.
97
257
name: string; Example: 'Mandos'
98
258
type: string; Example: '_mandos._tcp'.
99
See <http://www.dns-sd.org/ServiceTypes.html>
259
See <https://www.iana.org/assignments/service-names-port-numbers>
100
260
port: integer; what port to announce
101
261
TXT: list of strings; TXT record for the service
102
262
domain: string; Domain to publish on, default to .local if empty.
104
264
max_renames: integer; maximum number of renames
105
265
rename_count: integer; counter so we only rename after collisions
106
266
a sensible number of times
267
group: D-Bus Entry Group
268
server: D-Bus Server
269
bus: dbus.SystemBus()
107
270
"""
108
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
109
type = None, port = None, TXT = None, domain = "",
110
host = "", max_renames = 32768):
271
272
def __init__(self,
273
interface = avahi.IF_UNSPEC,
274
name = None,
275
servicetype = None,
276
port = None,
277
TXT = None,
278
domain = "",
279
host = "",
280
max_renames = 32768,
281
protocol = avahi.PROTO_UNSPEC,
282
bus = None):
111
283
self.interface = interface
112
284
self.name = name
113
self.type = type
285
self.type = servicetype
114
286
self.port = port
115
if TXT is None:
116
self.TXT = []
117
else:
118
self.TXT = TXT
287
self.TXT = TXT if TXT is not None else []
119
288
self.domain = domain
120
289
self.host = host
121
290
self.rename_count = 0
122
291
self.max_renames = max_renames
123
def rename(self):
292
self.protocol = protocol
293
self.group = None # our entry group
294
self.server = None
295
self.bus = bus
296
self.entry_group_state_changed_match = None
297
298
def rename(self, remove=True):
124
299
"""Derived from the Avahi example code"""
125
300
if self.rename_count >= self.max_renames:
126
logger.critical(u"No suitable service name found after %i"
127
u" retries, exiting.", rename_count)
301
logger.critical("No suitable Zeroconf service name found"
302
" after %i retries, exiting.",
303
self.rename_count)
128
304
raise AvahiServiceError("Too many renames")
129
self.name = server.GetAlternativeServiceName(self.name)
130
logger.info(u"Changing name to %r ...", str(self.name))
131
syslogger.setFormatter(logging.Formatter\
132
('Mandos (%s): %%(levelname)s:'
133
' %%(message)s' % self.name))
134
self.remove()
135
self.add()
305
self.name = str(
306
self.server.GetAlternativeServiceName(self.name))
136
307
self.rename_count += 1
308
logger.info("Changing Zeroconf service name to %r ...",
309
self.name)
310
if remove:
311
self.remove()
312
try:
313
self.add()
314
except dbus.exceptions.DBusException as error:
315
if (error.get_dbus_name()
316
== "org.freedesktop.Avahi.CollisionError"):
317
logger.info("Local Zeroconf service name collision.")
318
return self.rename(remove=False)
319
else:
320
logger.critical("D-Bus Exception", exc_info=error)
321
self.cleanup()
322
os._exit(1)
323
137
324
def remove(self):
138
325
"""Derived from the Avahi example code"""
139
if group is not None:
140
group.Reset()
326
if self.entry_group_state_changed_match is not None:
327
self.entry_group_state_changed_match.remove()
328
self.entry_group_state_changed_match = None
329
if self.group is not None:
330
self.group.Reset()
331
141
332
def add(self):
142
333
"""Derived from the Avahi example code"""
143
global group
144
if group is None:
145
group = dbus.Interface\
146
(bus.get_object(avahi.DBUS_NAME,
147
server.EntryGroupNew()),
148
avahi.DBUS_INTERFACE_ENTRY_GROUP)
149
group.connect_to_signal('StateChanged',
150
entry_group_state_changed)
151
logger.debug(u"Adding service '%s' of type '%s' ...",
152
service.name, service.type)
153
group.AddService(
154
self.interface, # interface
155
avahi.PROTO_INET6, # protocol
156
dbus.UInt32(0), # flags
157
self.name, self.type,
158
self.domain, self.host,
159
dbus.UInt16(self.port),
160
avahi.string_array_to_txt_array(self.TXT))
161
group.Commit()
162
163
# From the Avahi example code:
164
group = None # our entry group
165
# End of Avahi example code
334
self.remove()
335
if self.group is None:
336
self.group = dbus.Interface(
337
self.bus.get_object(avahi.DBUS_NAME,
338
self.server.EntryGroupNew()),
339
avahi.DBUS_INTERFACE_ENTRY_GROUP)
340
self.entry_group_state_changed_match = (
341
self.group.connect_to_signal(
342
'StateChanged', self.entry_group_state_changed))
343
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
344
self.name, self.type)
345
self.group.AddService(
346
self.interface,
347
self.protocol,
348
dbus.UInt32(0), # flags
349
self.name, self.type,
350
self.domain, self.host,
351
dbus.UInt16(self.port),
352
avahi.string_array_to_txt_array(self.TXT))
353
self.group.Commit()
354
355
def entry_group_state_changed(self, state, error):
356
"""Derived from the Avahi example code"""
357
logger.debug("Avahi entry group state change: %i", state)
358
359
if state == avahi.ENTRY_GROUP_ESTABLISHED:
360
logger.debug("Zeroconf service established.")
361
elif state == avahi.ENTRY_GROUP_COLLISION:
362
logger.info("Zeroconf service name collision.")
363
self.rename()
364
elif state == avahi.ENTRY_GROUP_FAILURE:
365
logger.critical("Avahi: Error in group state changed %s",
366
str(error))
367
raise AvahiGroupError("State changed: {!s}".format(error))
368
369
def cleanup(self):
370
"""Derived from the Avahi example code"""
371
if self.group is not None:
372
try:
373
self.group.Free()
374
except (dbus.exceptions.UnknownMethodException,
375
dbus.exceptions.DBusException):
376
pass
377
self.group = None
378
self.remove()
379
380
def server_state_changed(self, state, error=None):
381
"""Derived from the Avahi example code"""
382
logger.debug("Avahi server state change: %i", state)
383
bad_states = {
384
avahi.SERVER_INVALID: "Zeroconf server invalid",
385
avahi.SERVER_REGISTERING: None,
386
avahi.SERVER_COLLISION: "Zeroconf server name collision",
387
avahi.SERVER_FAILURE: "Zeroconf server failure",
388
}
389
if state in bad_states:
390
if bad_states[state] is not None:
391
if error is None:
392
logger.error(bad_states[state])
393
else:
394
logger.error(bad_states[state] + ": %r", error)
395
self.cleanup()
396
elif state == avahi.SERVER_RUNNING:
397
self.add()
398
else:
399
if error is None:
400
logger.debug("Unknown state: %r", state)
401
else:
402
logger.debug("Unknown state: %r: %r", state, error)
403
404
def activate(self):
405
"""Derived from the Avahi example code"""
406
if self.server is None:
407
self.server = dbus.Interface(
408
self.bus.get_object(avahi.DBUS_NAME,
409
avahi.DBUS_PATH_SERVER,
410
follow_name_owner_changes=True),
411
avahi.DBUS_INTERFACE_SERVER)
412
self.server.connect_to_signal("StateChanged",
413
self.server_state_changed)
414
self.server_state_changed(self.server.GetState())
415
416
417
class AvahiServiceToSyslog(AvahiService):
418
def rename(self, *args, **kwargs):
419
"""Add the new name to the syslog messages"""
420
ret = AvahiService.rename(self, *args, **kwargs)
421
syslogger.setFormatter(logging.Formatter(
422
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
423
.format(self.name)))
424
return ret
166
425
167
426
168
427
class Client(object):
169
428
"""A representation of a client host served by this server.
429
170
430
Attributes:
171
name: string; from the config file, used in log messages
431
approved: bool(); 'None' if not yet approved/disapproved
432
approval_delay: datetime.timedelta(); Time to wait for approval
433
approval_duration: datetime.timedelta(); Duration of one approval
434
checker: subprocess.Popen(); a running checker process used
435
to see if the client lives.
436
'None' if no process is running.
437
checker_callback_tag: a gobject event source tag, or None
438
checker_command: string; External command which is run to check
439
if client lives. %() expansions are done at
440
runtime with vars(self) as dict, so that for
441
instance %(name)s can be used in the command.
442
checker_initiator_tag: a gobject event source tag, or None
443
created: datetime.datetime(); (UTC) object creation
444
client_structure: Object describing what attributes a client has
445
and is used for storing the client at exit
446
current_checker_command: string; current running checker_command
447
disable_initiator_tag: a gobject event source tag, or None
448
enabled: bool()
172
449
fingerprint: string (40 or 32 hexadecimal digits); used to
173
450
uniquely identify the client
174
secret: bytestring; sent verbatim (over TLS) to client
175
host: string; available for use by the checker command
176
created: datetime.datetime(); object creation, not client host
177
last_checked_ok: datetime.datetime() or None if not yet checked OK
178
timeout: datetime.timedelta(); How long from last_checked_ok
179
until this client is invalid
180
interval: datetime.timedelta(); How often to start a new checker
181
stop_hook: If set, called by stop() as stop_hook(self)
182
checker: subprocess.Popen(); a running checker process used
183
to see if the client lives.
184
'None' if no process is running.
185
checker_initiator_tag: a gobject event source tag, or None
186
stop_initiator_tag: - '' -
187
checker_callback_tag: - '' -
188
checker_command: string; External command which is run to check if
189
client lives. %() expansions are done at
190
runtime with vars(self) as dict, so that for
191
instance %(name)s can be used in the command.
192
Private attibutes:
193
_timeout: Real variable for 'timeout'
194
_interval: Real variable for 'interval'
195
_timeout_milliseconds: Used when calling gobject.timeout_add()
196
_interval_milliseconds: - '' -
451
host: string; available for use by the checker command
452
interval: datetime.timedelta(); How often to start a new checker
453
last_approval_request: datetime.datetime(); (UTC) or None
454
last_checked_ok: datetime.datetime(); (UTC) or None
455
last_checker_status: integer between 0 and 255 reflecting exit
456
status of last checker. -1 reflects crashed
457
checker, -2 means no checker completed yet.
458
last_enabled: datetime.datetime(); (UTC) or None
459
name: string; from the config file, used in log messages and
460
D-Bus identifiers
461
secret: bytestring; sent verbatim (over TLS) to client
462
timeout: datetime.timedelta(); How long from last_checked_ok
463
until this client is disabled
464
extended_timeout: extra long timeout when secret has been sent
465
runtime_expansions: Allowed attributes for runtime expansion.
466
expires: datetime.datetime(); time (UTC) when a client will be
467
disabled, or None
468
server_settings: The server_settings dict from main()
197
469
"""
198
def _set_timeout(self, timeout):
199
"Setter function for 'timeout' attribute"
200
self._timeout = timeout
201
self._timeout_milliseconds = ((self.timeout.days
202
* 24 * 60 * 60 * 1000)
203
+ (self.timeout.seconds * 1000)
204
+ (self.timeout.microseconds
205
// 1000))
206
timeout = property(lambda self: self._timeout,
207
_set_timeout)
208
del _set_timeout
209
def _set_interval(self, interval):
210
"Setter function for 'interval' attribute"
211
self._interval = interval
212
self._interval_milliseconds = ((self.interval.days
213
* 24 * 60 * 60 * 1000)
214
+ (self.interval.seconds
215
* 1000)
216
+ (self.interval.microseconds
217
// 1000))
218
interval = property(lambda self: self._interval,
219
_set_interval)
220
del _set_interval
221
def __init__(self, name = None, stop_hook=None, config={}):
222
"""Note: the 'checker' key in 'config' sets the
223
'checker_command' attribute and *not* the 'checker'
224
attribute."""
470
471
runtime_expansions = ("approval_delay", "approval_duration",
472
"created", "enabled", "expires",
473
"fingerprint", "host", "interval",
474
"last_approval_request", "last_checked_ok",
475
"last_enabled", "name", "timeout")
476
client_defaults = {
477
"timeout": "PT5M",
478
"extended_timeout": "PT15M",
479
"interval": "PT2M",
480
"checker": "fping -q -- %%(host)s",
481
"host": "",
482
"approval_delay": "PT0S",
483
"approval_duration": "PT1S",
484
"approved_by_default": "True",
485
"enabled": "True",
486
}
487
488
@staticmethod
489
def config_parser(config):
490
"""Construct a new dict of client settings of this form:
491
{ client_name: {setting_name: value, ...}, ...}
492
with exceptions for any special settings as defined above.
493
NOTE: Must be a pure function. Must return the same result
494
value given the same arguments.
495
"""
496
settings = {}
497
for client_name in config.sections():
498
section = dict(config.items(client_name))
499
client = settings[client_name] = {}
500
501
client["host"] = section["host"]
502
# Reformat values from string types to Python types
503
client["approved_by_default"] = config.getboolean(
504
client_name, "approved_by_default")
505
client["enabled"] = config.getboolean(client_name,
506
"enabled")
507
508
# Uppercase and remove spaces from fingerprint for later
509
# comparison purposes with return value from the
510
# fingerprint() function
511
client["fingerprint"] = (section["fingerprint"].upper()
512
.replace(" ", ""))
513
if "secret" in section:
514
client["secret"] = section["secret"].decode("base64")
515
elif "secfile" in section:
516
with open(os.path.expanduser(os.path.expandvars
517
(section["secfile"])),
518
"rb") as secfile:
519
client["secret"] = secfile.read()
520
else:
521
raise TypeError("No secret or secfile for section {}"
522
.format(section))
523
client["timeout"] = string_to_delta(section["timeout"])
524
client["extended_timeout"] = string_to_delta(
525
section["extended_timeout"])
526
client["interval"] = string_to_delta(section["interval"])
527
client["approval_delay"] = string_to_delta(
528
section["approval_delay"])
529
client["approval_duration"] = string_to_delta(
530
section["approval_duration"])
531
client["checker_command"] = section["checker"]
532
client["last_approval_request"] = None
533
client["last_checked_ok"] = None
534
client["last_checker_status"] = -2
535
536
return settings
537
538
def __init__(self, settings, name = None, server_settings=None):
225
539
self.name = name
226
logger.debug(u"Creating client %r", self.name)
227
# Uppercase and remove spaces from fingerprint for later
228
# comparison purposes with return value from the fingerprint()
229
# function
230
self.fingerprint = config["fingerprint"].upper()\
231
.replace(u" ", u"")
232
logger.debug(u" Fingerprint: %s", self.fingerprint)
233
if "secret" in config:
234
self.secret = config["secret"].decode(u"base64")
235
elif "secfile" in config:
236
sf = open(config["secfile"])
237
self.secret = sf.read()
238
sf.close()
540
if server_settings is None:
541
server_settings = {}
542
self.server_settings = server_settings
543
# adding all client settings
544
for setting, value in settings.items():
545
setattr(self, setting, value)
546
547
if self.enabled:
548
if not hasattr(self, "last_enabled"):
549
self.last_enabled = datetime.datetime.utcnow()
550
if not hasattr(self, "expires"):
551
self.expires = (datetime.datetime.utcnow()
552
+ self.timeout)
239
553
else:
240
raise TypeError(u"No secret or secfile for client %s"
241
% self.name)
242
self.host = config.get("host", "")
243
self.created = datetime.datetime.now()
244
self.last_checked_ok = None
245
self.timeout = string_to_delta(config["timeout"])
246
self.interval = string_to_delta(config["interval"])
247
self.stop_hook = stop_hook
554
self.last_enabled = None
555
self.expires = None
556
557
logger.debug("Creating client %r", self.name)
558
logger.debug(" Fingerprint: %s", self.fingerprint)
559
self.created = settings.get("created",
560
datetime.datetime.utcnow())
561
562
# attributes specific for this server instance
248
563
self.checker = None
249
564
self.checker_initiator_tag = None
250
self.stop_initiator_tag = None
565
self.disable_initiator_tag = None
251
566
self.checker_callback_tag = None
252
self.check_command = config["checker"]
253
def start(self):
567
self.current_checker_command = None
568
self.approved = None
569
self.approvals_pending = 0
570
self.changedstate = multiprocessing_manager.Condition(
571
multiprocessing_manager.Lock())
572
self.client_structure = [attr
573
for attr in self.__dict__.iterkeys()
574
if not attr.startswith("_")]
575
self.client_structure.append("client_structure")
576
577
for name, t in inspect.getmembers(
578
type(self), lambda obj: isinstance(obj, property)):
579
if not name.startswith("_"):
580
self.client_structure.append(name)
581
582
# Send notice to process children that client state has changed
583
def send_changedstate(self):
584
with self.changedstate:
585
self.changedstate.notify_all()
586
587
def enable(self):
254
588
"""Start this client's checker and timeout hooks"""
589
if getattr(self, "enabled", False):
590
# Already enabled
591
return
592
self.expires = datetime.datetime.utcnow() + self.timeout
593
self.enabled = True
594
self.last_enabled = datetime.datetime.utcnow()
595
self.init_checker()
596
self.send_changedstate()
597
598
def disable(self, quiet=True):
599
"""Disable this client."""
600
if not getattr(self, "enabled", False):
601
return False
602
if not quiet:
603
logger.info("Disabling client %s", self.name)
604
if getattr(self, "disable_initiator_tag", None) is not None:
605
gobject.source_remove(self.disable_initiator_tag)
606
self.disable_initiator_tag = None
607
self.expires = None
608
if getattr(self, "checker_initiator_tag", None) is not None:
609
gobject.source_remove(self.checker_initiator_tag)
610
self.checker_initiator_tag = None
611
self.stop_checker()
612
self.enabled = False
613
if not quiet:
614
self.send_changedstate()
615
# Do not run this again if called by a gobject.timeout_add
616
return False
617
618
def __del__(self):
619
self.disable()
620
621
def init_checker(self):
255
622
# Schedule a new checker to be started an 'interval' from now,
256
623
# and every interval from then on.
257
self.checker_initiator_tag = gobject.timeout_add\
258
(self._interval_milliseconds,
259
self.start_checker)
624
if self.checker_initiator_tag is not None:
625
gobject.source_remove(self.checker_initiator_tag)
626
self.checker_initiator_tag = gobject.timeout_add(
627
int(self.interval.total_seconds() * 1000),
628
self.start_checker)
629
# Schedule a disable() when 'timeout' has passed
630
if self.disable_initiator_tag is not None:
631
gobject.source_remove(self.disable_initiator_tag)
632
self.disable_initiator_tag = gobject.timeout_add(
633
int(self.timeout.total_seconds() * 1000), self.disable)
260
634
# Also start a new checker *right now*.
261
635
self.start_checker()
262
# Schedule a stop() when 'timeout' has passed
263
self.stop_initiator_tag = gobject.timeout_add\
264
(self._timeout_milliseconds,
265
self.stop)
266
def stop(self):
267
"""Stop this client.
268
The possibility that a client might be restarted is left open,
269
but not currently used."""
270
# If this client doesn't have a secret, it is already stopped.
271
if hasattr(self, "secret") and self.secret:
272
logger.info(u"Stopping client %s", self.name)
273
self.secret = None
274
else:
275
return False
276
if getattr(self, "stop_initiator_tag", False):
277
gobject.source_remove(self.stop_initiator_tag)
278
self.stop_initiator_tag = None
279
if getattr(self, "checker_initiator_tag", False):
280
gobject.source_remove(self.checker_initiator_tag)
281
self.checker_initiator_tag = None
282
self.stop_checker()
283
if self.stop_hook:
284
self.stop_hook(self)
285
# Do not run this again if called by a gobject.timeout_add
286
return False
287
def __del__(self):
288
self.stop_hook = None
289
self.stop()
290
def checker_callback(self, pid, condition):
636
637
def checker_callback(self, pid, condition, command):
291
638
"""The checker has completed, so take appropriate actions."""
292
now = datetime.datetime.now()
293
639
self.checker_callback_tag = None
294
640
self.checker = None
295
if os.WIFEXITED(condition) \
296
and (os.WEXITSTATUS(condition) == 0):
297
logger.info(u"Checker for %(name)s succeeded",
298
vars(self))
299
self.last_checked_ok = now
300
gobject.source_remove(self.stop_initiator_tag)
301
self.stop_initiator_tag = gobject.timeout_add\
302
(self._timeout_milliseconds,
303
self.stop)
304
elif not os.WIFEXITED(condition):
305
logger.warning(u"Checker for %(name)s crashed?",
641
if os.WIFEXITED(condition):
642
self.last_checker_status = os.WEXITSTATUS(condition)
643
if self.last_checker_status == 0:
644
logger.info("Checker for %(name)s succeeded",
645
vars(self))
646
self.checked_ok()
647
else:
648
logger.info("Checker for %(name)s failed", vars(self))
649
else:
650
self.last_checker_status = -1
651
logger.warning("Checker for %(name)s crashed?",
306
652
vars(self))
307
else:
308
logger.info(u"Checker for %(name)s failed",
309
vars(self))
653
654
def checked_ok(self):
655
"""Assert that the client has been seen, alive and well."""
656
self.last_checked_ok = datetime.datetime.utcnow()
657
self.last_checker_status = 0
658
self.bump_timeout()
659
660
def bump_timeout(self, timeout=None):
661
"""Bump up the timeout for this client."""
662
if timeout is None:
663
timeout = self.timeout
664
if self.disable_initiator_tag is not None:
665
gobject.source_remove(self.disable_initiator_tag)
666
self.disable_initiator_tag = None
667
if getattr(self, "enabled", False):
668
self.disable_initiator_tag = gobject.timeout_add(
669
int(timeout.total_seconds() * 1000), self.disable)
670
self.expires = datetime.datetime.utcnow() + timeout
671
672
def need_approval(self):
673
self.last_approval_request = datetime.datetime.utcnow()
674
310
675
def start_checker(self):
311
676
"""Start a new checker subprocess if one is not running.
677
312
678
If a checker already exists, leave it running and do
313
679
nothing."""
314
680
# The reason for not killing a running checker is that if we
315
# did that, then if a checker (for some reason) started
316
# running slowly and taking more than 'interval' time, the
317
# client would inevitably timeout, since no checker would get
318
# a chance to run to completion. If we instead leave running
681
# did that, and if a checker (for some reason) started running
682
# slowly and taking more than 'interval' time, then the client
683
# would inevitably timeout, since no checker would get a
684
# chance to run to completion. If we instead leave running
319
685
# checkers alone, the checker would have to take more time
320
# than 'timeout' for the client to be declared invalid, which
321
# is as it should be.
686
# than 'timeout' for the client to be disabled, which is as it
687
# should be.
688
689
# If a checker exists, make sure it is not a zombie
690
try:
691
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
692
except AttributeError:
693
pass
694
except OSError as error:
695
if error.errno != errno.ECHILD:
696
raise
697
else:
698
if pid:
699
logger.warning("Checker was a zombie")
700
gobject.source_remove(self.checker_callback_tag)
701
self.checker_callback(pid, status,
702
self.current_checker_command)
703
# Start a new checker if needed
322
704
if self.checker is None:
323
try:
324
# In case check_command has exactly one % operator
325
command = self.check_command % self.host
326
except TypeError:
327
# Escape attributes for the shell
328
escaped_attrs = dict((key, re.escape(str(val)))
329
for key, val in
330
vars(self).iteritems())
331
try:
332
command = self.check_command % escaped_attrs
333
except TypeError, error:
334
logger.error(u'Could not format string "%s":'
335
u' %s', self.check_command, error)
336
return True # Try again later
337
try:
338
logger.info(u"Starting checker %r for %s",
339
command, self.name)
705
# Escape attributes for the shell
706
escaped_attrs = {
707
attr: re.escape(str(getattr(self, attr)))
708
for attr in self.runtime_expansions }
709
try:
710
command = self.checker_command % escaped_attrs
711
except TypeError as error:
712
logger.error('Could not format string "%s"',
713
self.checker_command,
714
exc_info=error)
715
return True # Try again later
716
self.current_checker_command = command
717
try:
718
logger.info("Starting checker %r for %s", command,
719
self.name)
720
# We don't need to redirect stdout and stderr, since
721
# in normal mode, that is already done by daemon(),
722
# and in debug mode we don't want to. (Stdin is
723
# always replaced by /dev/null.)
724
# The exception is when not debugging but nevertheless
725
# running in the foreground; use the previously
726
# created wnull.
727
popen_args = {}
728
if (not self.server_settings["debug"]
729
and self.server_settings["foreground"]):
730
popen_args.update({"stdout": wnull,
731
"stderr": wnull })
340
732
self.checker = subprocess.Popen(command,
341
733
close_fds=True,
342
shell=True, cwd="/")
343
self.checker_callback_tag = gobject.child_watch_add\
344
(self.checker.pid,
345
self.checker_callback)
346
except subprocess.OSError, error:
347
logger.error(u"Failed to start subprocess: %s",
348
error)
734
shell=True,
735
cwd="/",
736
**popen_args)
737
except OSError as error:
738
logger.error("Failed to start subprocess",
739
exc_info=error)
740
return True
741
self.checker_callback_tag = gobject.child_watch_add(
742
self.checker.pid, self.checker_callback, data=command)
743
# The checker may have completed before the gobject
744
# watch was added. Check for this.
745
try:
746
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
747
except OSError as error:
748
if error.errno == errno.ECHILD:
749
# This should never happen
750
logger.error("Child process vanished",
751
exc_info=error)
752
return True
753
raise
754
if pid:
755
gobject.source_remove(self.checker_callback_tag)
756
self.checker_callback(pid, status, command)
349
757
# Re-run this periodically if run by gobject.timeout_add
350
758
return True
759
351
760
def stop_checker(self):
352
761
"""Force the checker process, if any, to stop."""
353
762
if self.checker_callback_tag:
355
764
self.checker_callback_tag = None
356
765
if getattr(self, "checker", None) is None:
357
766
return
358
logger.debug(u"Stopping checker for %(name)s", vars(self))
767
logger.debug("Stopping checker for %(name)s", vars(self))
359
768
try:
360
os.kill(self.checker.pid, signal.SIGTERM)
361
#os.sleep(0.5)
769
self.checker.terminate()
770
#time.sleep(0.5)
362
771
#if self.checker.poll() is None:
363
# os.kill(self.checker.pid, signal.SIGKILL)
364
except OSError, error:
772
# self.checker.kill()
773
except OSError as error:
365
774
if error.errno != errno.ESRCH: # No such process
366
775
raise
367
776
self.checker = None
368
def still_valid(self):
369
"""Has the timeout not yet passed for this client?"""
370
now = datetime.datetime.now()
371
if self.last_checked_ok is None:
372
return now < (self.created + self.timeout)
373
else:
374
return now < (self.last_checked_ok + self.timeout)
375
376
377
def peer_certificate(session):
378
"Return the peer's OpenPGP certificate as a bytestring"
379
# If not an OpenPGP certificate...
380
if gnutls.library.functions.gnutls_certificate_type_get\
381
(session._c_object) \
382
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP:
383
# ...do the normal thing
384
return session.peer_certificate
385
list_size = ctypes.c_uint()
386
cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
387
(session._c_object, ctypes.byref(list_size))
388
if list_size.value == 0:
389
return None
390
cert = cert_list[0]
391
return ctypes.string_at(cert.data, cert.size)
392
393
394
def fingerprint(openpgp):
395
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
396
# New GnuTLS "datum" with the OpenPGP public key
397
datum = gnutls.library.types.gnutls_datum_t\
398
(ctypes.cast(ctypes.c_char_p(openpgp),
399
ctypes.POINTER(ctypes.c_ubyte)),
400
ctypes.c_uint(len(openpgp)))
401
# New empty GnuTLS certificate
402
crt = gnutls.library.types.gnutls_openpgp_crt_t()
403
gnutls.library.functions.gnutls_openpgp_crt_init\
404
(ctypes.byref(crt))
405
# Import the OpenPGP public key into the certificate
406
gnutls.library.functions.gnutls_openpgp_crt_import\
407
(crt, ctypes.byref(datum),
408
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
409
# New buffer for the fingerprint
410
buffer = ctypes.create_string_buffer(20)
411
buffer_length = ctypes.c_size_t()
412
# Get the fingerprint from the certificate into the buffer
413
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
414
(crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
415
# Deinit the certificate
416
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
417
# Convert the buffer to a Python bytestring
418
fpr = ctypes.string_at(buffer, buffer_length.value)
419
# Convert the bytestring to hexadecimal notation
420
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
421
return hex_fpr
422
423
424
class tcp_handler(SocketServer.BaseRequestHandler, object):
425
"""A TCP request handler class.
426
Instantiated by IPv6_TCPServer for each request to handle it.
777
778
779
def dbus_service_property(dbus_interface,
780
signature="v",
781
access="readwrite",
782
byte_arrays=False):
783
"""Decorators for marking methods of a DBusObjectWithProperties to
784
become properties on the D-Bus.
785
786
The decorated method will be called with no arguments by "Get"
787
and with one argument by "Set".
788
789
The parameters, where they are supported, are the same as
790
dbus.service.method, except there is only "signature", since the
791
type from Get() and the type sent to Set() is the same.
792
"""
793
# Encoding deeply encoded byte arrays is not supported yet by the
794
# "Set" method, so we fail early here:
795
if byte_arrays and signature != "ay":
796
raise ValueError("Byte arrays not supported for non-'ay'"
797
" signature {!r}".format(signature))
798
799
def decorator(func):
800
func._dbus_is_property = True
801
func._dbus_interface = dbus_interface
802
func._dbus_signature = signature
803
func._dbus_access = access
804
func._dbus_name = func.__name__
805
if func._dbus_name.endswith("_dbus_property"):
806
func._dbus_name = func._dbus_name[:-14]
807
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
808
return func
809
810
return decorator
811
812
813
def dbus_interface_annotations(dbus_interface):
814
"""Decorator for marking functions returning interface annotations
815
816
Usage:
817
818
@dbus_interface_annotations("org.example.Interface")
819
def _foo(self): # Function name does not matter
820
return {"org.freedesktop.DBus.Deprecated": "true",
821
"org.freedesktop.DBus.Property.EmitsChangedSignal":
822
"false"}
823
"""
824
825
def decorator(func):
826
func._dbus_is_interface = True
827
func._dbus_interface = dbus_interface
828
func._dbus_name = dbus_interface
829
return func
830
831
return decorator
832
833
834
def dbus_annotations(annotations):
835
"""Decorator to annotate D-Bus methods, signals or properties
836
Usage:
837
838
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
839
"org.freedesktop.DBus.Property."
840
"EmitsChangedSignal": "false"})
841
@dbus_service_property("org.example.Interface", signature="b",
842
access="r")
843
def Property_dbus_property(self):
844
return dbus.Boolean(False)
845
"""
846
847
def decorator(func):
848
func._dbus_annotations = annotations
849
return func
850
851
return decorator
852
853
854
class DBusPropertyException(dbus.exceptions.DBusException):
855
"""A base class for D-Bus property-related exceptions
856
"""
857
pass
858
859
860
class DBusPropertyAccessException(DBusPropertyException):
861
"""A property's access permissions disallows an operation.
862
"""
863
pass
864
865
866
class DBusPropertyNotFound(DBusPropertyException):
867
"""An attempt was made to access a non-existing property.
868
"""
869
pass
870
871
872
class DBusObjectWithProperties(dbus.service.Object):
873
"""A D-Bus object with properties.
874
875
Classes inheriting from this can use the dbus_service_property
876
decorator to expose methods as D-Bus properties. It exposes the
877
standard Get(), Set(), and GetAll() methods on the D-Bus.
878
"""
879
880
@staticmethod
881
def _is_dbus_thing(thing):
882
"""Returns a function testing if an attribute is a D-Bus thing
883
884
If called like _is_dbus_thing("method") it returns a function
885
suitable for use as predicate to inspect.getmembers().
886
"""
887
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
888
False)
889
890
def _get_all_dbus_things(self, thing):
891
"""Returns a generator of (name, attribute) pairs
892
"""
893
return ((getattr(athing.__get__(self), "_dbus_name", name),
894
athing.__get__(self))
895
for cls in self.__class__.__mro__
896
for name, athing in
897
inspect.getmembers(cls, self._is_dbus_thing(thing)))
898
899
def _get_dbus_property(self, interface_name, property_name):
900
"""Returns a bound method if one exists which is a D-Bus
901
property with the specified name and interface.
902
"""
903
for cls in self.__class__.__mro__:
904
for name, value in inspect.getmembers(
905
cls, self._is_dbus_thing("property")):
906
if (value._dbus_name == property_name
907
and value._dbus_interface == interface_name):
908
return value.__get__(self)
909
910
# No such property
911
raise DBusPropertyNotFound("{}:{}.{}".format(
912
self.dbus_object_path, interface_name, property_name))
913
914
@dbus.service.method(dbus.PROPERTIES_IFACE,
915
in_signature="ss",
916
out_signature="v")
917
def Get(self, interface_name, property_name):
918
"""Standard D-Bus property Get() method, see D-Bus standard.
919
"""
920
prop = self._get_dbus_property(interface_name, property_name)
921
if prop._dbus_access == "write":
922
raise DBusPropertyAccessException(property_name)
923
value = prop()
924
if not hasattr(value, "variant_level"):
925
return value
926
return type(value)(value, variant_level=value.variant_level+1)
927
928
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
929
def Set(self, interface_name, property_name, value):
930
"""Standard D-Bus property Set() method, see D-Bus standard.
931
"""
932
prop = self._get_dbus_property(interface_name, property_name)
933
if prop._dbus_access == "read":
934
raise DBusPropertyAccessException(property_name)
935
if prop._dbus_get_args_options["byte_arrays"]:
936
# The byte_arrays option is not supported yet on
937
# signatures other than "ay".
938
if prop._dbus_signature != "ay":
939
raise ValueError("Byte arrays not supported for non-"
940
"'ay' signature {!r}"
941
.format(prop._dbus_signature))
942
value = dbus.ByteArray(b''.join(chr(byte)
943
for byte in value))
944
prop(value)
945
946
@dbus.service.method(dbus.PROPERTIES_IFACE,
947
in_signature="s",
948
out_signature="a{sv}")
949
def GetAll(self, interface_name):
950
"""Standard D-Bus property GetAll() method, see D-Bus
951
standard.
952
953
Note: Will not include properties with access="write".
954
"""
955
properties = {}
956
for name, prop in self._get_all_dbus_things("property"):
957
if (interface_name
958
and interface_name != prop._dbus_interface):
959
# Interface non-empty but did not match
960
continue
961
# Ignore write-only properties
962
if prop._dbus_access == "write":
963
continue
964
value = prop()
965
if not hasattr(value, "variant_level"):
966
properties[name] = value
967
continue
968
properties[name] = type(value)(
969
value, variant_level = value.variant_level + 1)
970
return dbus.Dictionary(properties, signature="sv")
971
972
@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
973
def PropertiesChanged(self, interface_name, changed_properties,
974
invalidated_properties):
975
"""Standard D-Bus PropertiesChanged() signal, see D-Bus
976
standard.
977
"""
978
pass
979
980
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
981
out_signature="s",
982
path_keyword='object_path',
983
connection_keyword='connection')
984
def Introspect(self, object_path, connection):
985
"""Overloading of standard D-Bus method.
986
987
Inserts property tags and interface annotation tags.
988
"""
989
xmlstring = dbus.service.Object.Introspect(self, object_path,
990
connection)
991
try:
992
document = xml.dom.minidom.parseString(xmlstring)
993
994
def make_tag(document, name, prop):
995
e = document.createElement("property")
996
e.setAttribute("name", name)
997
e.setAttribute("type", prop._dbus_signature)
998
e.setAttribute("access", prop._dbus_access)
999
return e
1000
1001
for if_tag in document.getElementsByTagName("interface"):
1002
# Add property tags
1003
for tag in (make_tag(document, name, prop)
1004
for name, prop
1005
in self._get_all_dbus_things("property")
1006
if prop._dbus_interface
1007
== if_tag.getAttribute("name")):
1008
if_tag.appendChild(tag)
1009
# Add annotation tags
1010
for typ in ("method", "signal", "property"):
1011
for tag in if_tag.getElementsByTagName(typ):
1012
annots = dict()
1013
for name, prop in (self.
1014
_get_all_dbus_things(typ)):
1015
if (name == tag.getAttribute("name")
1016
and prop._dbus_interface
1017
== if_tag.getAttribute("name")):
1018
annots.update(getattr(
1019
prop, "_dbus_annotations", {}))
1020
for name, value in annots.items():
1021
ann_tag = document.createElement(
1022
"annotation")
1023
ann_tag.setAttribute("name", name)
1024
ann_tag.setAttribute("value", value)
1025
tag.appendChild(ann_tag)
1026
# Add interface annotation tags
1027
for annotation, value in dict(
1028
itertools.chain.from_iterable(
1029
annotations().items()
1030
for name, annotations
1031
in self._get_all_dbus_things("interface")
1032
if name == if_tag.getAttribute("name")
1033
)).items():
1034
ann_tag = document.createElement("annotation")
1035
ann_tag.setAttribute("name", annotation)
1036
ann_tag.setAttribute("value", value)
1037
if_tag.appendChild(ann_tag)
1038
# Add the names to the return values for the
1039
# "org.freedesktop.DBus.Properties" methods
1040
if (if_tag.getAttribute("name")
1041
== "org.freedesktop.DBus.Properties"):
1042
for cn in if_tag.getElementsByTagName("method"):
1043
if cn.getAttribute("name") == "Get":
1044
for arg in cn.getElementsByTagName("arg"):
1045
if (arg.getAttribute("direction")
1046
== "out"):
1047
arg.setAttribute("name", "value")
1048
elif cn.getAttribute("name") == "GetAll":
1049
for arg in cn.getElementsByTagName("arg"):
1050
if (arg.getAttribute("direction")
1051
== "out"):
1052
arg.setAttribute("name", "props")
1053
xmlstring = document.toxml("utf-8")
1054
document.unlink()
1055
except (AttributeError, xml.dom.DOMException,
1056
xml.parsers.expat.ExpatError) as error:
1057
logger.error("Failed to override Introspection method",
1058
exc_info=error)
1059
return xmlstring
1060
1061
1062
def datetime_to_dbus(dt, variant_level=0):
1063
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1064
if dt is None:
1065
return dbus.String("", variant_level = variant_level)
1066
return dbus.String(dt.isoformat(), variant_level=variant_level)
1067
1068
1069
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1070
"""A class decorator; applied to a subclass of
1071
dbus.service.Object, it will add alternate D-Bus attributes with
1072
interface names according to the "alt_interface_names" mapping.
1073
Usage:
1074
1075
@alternate_dbus_interfaces({"org.example.Interface":
1076
"net.example.AlternateInterface"})
1077
class SampleDBusObject(dbus.service.Object):
1078
@dbus.service.method("org.example.Interface")
1079
def SampleDBusMethod():
1080
pass
1081
1082
The above "SampleDBusMethod" on "SampleDBusObject" will be
1083
reachable via two interfaces: "org.example.Interface" and
1084
"net.example.AlternateInterface", the latter of which will have
1085
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1086
"true", unless "deprecate" is passed with a False value.
1087
1088
This works for methods and signals, and also for D-Bus properties
1089
(from DBusObjectWithProperties) and interfaces (from the
1090
dbus_interface_annotations decorator).
1091
"""
1092
1093
def wrapper(cls):
1094
for orig_interface_name, alt_interface_name in (
1095
alt_interface_names.items()):
1096
attr = {}
1097
interface_names = set()
1098
# Go though all attributes of the class
1099
for attrname, attribute in inspect.getmembers(cls):
1100
# Ignore non-D-Bus attributes, and D-Bus attributes
1101
# with the wrong interface name
1102
if (not hasattr(attribute, "_dbus_interface")
1103
or not attribute._dbus_interface.startswith(
1104
orig_interface_name)):
1105
continue
1106
# Create an alternate D-Bus interface name based on
1107
# the current name
1108
alt_interface = attribute._dbus_interface.replace(
1109
orig_interface_name, alt_interface_name)
1110
interface_names.add(alt_interface)
1111
# Is this a D-Bus signal?
1112
if getattr(attribute, "_dbus_is_signal", False):
1113
# Extract the original non-method undecorated
1114
# function by black magic
1115
nonmethod_func = (dict(
1116
zip(attribute.func_code.co_freevars,
1117
attribute.__closure__))
1118
["func"].cell_contents)
1119
# Create a new, but exactly alike, function
1120
# object, and decorate it to be a new D-Bus signal
1121
# with the alternate D-Bus interface name
1122
new_function = (dbus.service.signal(
1123
alt_interface, attribute._dbus_signature)
1124
(types.FunctionType(
1125
nonmethod_func.func_code,
1126
nonmethod_func.func_globals,
1127
nonmethod_func.func_name,
1128
nonmethod_func.func_defaults,
1129
nonmethod_func.func_closure)))
1130
# Copy annotations, if any
1131
try:
1132
new_function._dbus_annotations = dict(
1133
attribute._dbus_annotations)
1134
except AttributeError:
1135
pass
1136
# Define a creator of a function to call both the
1137
# original and alternate functions, so both the
1138
# original and alternate signals gets sent when
1139
# the function is called
1140
def fixscope(func1, func2):
1141
"""This function is a scope container to pass
1142
func1 and func2 to the "call_both" function
1143
outside of its arguments"""
1144
1145
def call_both(*args, **kwargs):
1146
"""This function will emit two D-Bus
1147
signals by calling func1 and func2"""
1148
func1(*args, **kwargs)
1149
func2(*args, **kwargs)
1150
1151
return call_both
1152
# Create the "call_both" function and add it to
1153
# the class
1154
attr[attrname] = fixscope(attribute, new_function)
1155
# Is this a D-Bus method?
1156
elif getattr(attribute, "_dbus_is_method", False):
1157
# Create a new, but exactly alike, function
1158
# object. Decorate it to be a new D-Bus method
1159
# with the alternate D-Bus interface name. Add it
1160
# to the class.
1161
attr[attrname] = (
1162
dbus.service.method(
1163
alt_interface,
1164
attribute._dbus_in_signature,
1165
attribute._dbus_out_signature)
1166
(types.FunctionType(attribute.func_code,
1167
attribute.func_globals,
1168
attribute.func_name,
1169
attribute.func_defaults,
1170
attribute.func_closure)))
1171
# Copy annotations, if any
1172
try:
1173
attr[attrname]._dbus_annotations = dict(
1174
attribute._dbus_annotations)
1175
except AttributeError:
1176
pass
1177
# Is this a D-Bus property?
1178
elif getattr(attribute, "_dbus_is_property", False):
1179
# Create a new, but exactly alike, function
1180
# object, and decorate it to be a new D-Bus
1181
# property with the alternate D-Bus interface
1182
# name. Add it to the class.
1183
attr[attrname] = (dbus_service_property(
1184
alt_interface, attribute._dbus_signature,
1185
attribute._dbus_access,
1186
attribute._dbus_get_args_options
1187
["byte_arrays"])
1188
(types.FunctionType(
1189
attribute.func_code,
1190
attribute.func_globals,
1191
attribute.func_name,
1192
attribute.func_defaults,
1193
attribute.func_closure)))
1194
# Copy annotations, if any
1195
try:
1196
attr[attrname]._dbus_annotations = dict(
1197
attribute._dbus_annotations)
1198
except AttributeError:
1199
pass
1200
# Is this a D-Bus interface?
1201
elif getattr(attribute, "_dbus_is_interface", False):
1202
# Create a new, but exactly alike, function
1203
# object. Decorate it to be a new D-Bus interface
1204
# with the alternate D-Bus interface name. Add it
1205
# to the class.
1206
attr[attrname] = (
1207
dbus_interface_annotations(alt_interface)
1208
(types.FunctionType(attribute.func_code,
1209
attribute.func_globals,
1210
attribute.func_name,
1211
attribute.func_defaults,
1212
attribute.func_closure)))
1213
if deprecate:
1214
# Deprecate all alternate interfaces
1215
iname="_AlternateDBusNames_interface_annotation{}"
1216
for interface_name in interface_names:
1217
1218
@dbus_interface_annotations(interface_name)
1219
def func(self):
1220
return { "org.freedesktop.DBus.Deprecated":
1221
"true" }
1222
# Find an unused name
1223
for aname in (iname.format(i)
1224
for i in itertools.count()):
1225
if aname not in attr:
1226
attr[aname] = func
1227
break
1228
if interface_names:
1229
# Replace the class with a new subclass of it with
1230
# methods, signals, etc. as created above.
1231
cls = type(b"{}Alternate".format(cls.__name__),
1232
(cls, ), attr)
1233
return cls
1234
1235
return wrapper
1236
1237
1238
@alternate_dbus_interfaces({"se.recompile.Mandos":
1239
"se.bsnet.fukt.Mandos"})
1240
class ClientDBus(Client, DBusObjectWithProperties):
1241
"""A Client class using D-Bus
1242
1243
Attributes:
1244
dbus_object_path: dbus.ObjectPath
1245
bus: dbus.SystemBus()
1246
"""
1247
1248
runtime_expansions = (Client.runtime_expansions
1249
+ ("dbus_object_path", ))
1250
1251
_interface = "se.recompile.Mandos.Client"
1252
1253
# dbus.service.Object doesn't use super(), so we can't either.
1254
1255
def __init__(self, bus = None, *args, **kwargs):
1256
self.bus = bus
1257
Client.__init__(self, *args, **kwargs)
1258
# Only now, when this client is initialized, can it show up on
1259
# the D-Bus
1260
client_object_name = str(self.name).translate(
1261
{ord("."): ord("_"),
1262
ord("-"): ord("_")})
1263
self.dbus_object_path = dbus.ObjectPath(
1264
"/clients/" + client_object_name)
1265
DBusObjectWithProperties.__init__(self, self.bus,
1266
self.dbus_object_path)
1267
1268
def notifychangeproperty(transform_func, dbus_name,
1269
type_func=lambda x: x,
1270
variant_level=1,
1271
invalidate_only=False,
1272
_interface=_interface):
1273
""" Modify a variable so that it's a property which announces
1274
its changes to DBus.
1275
1276
transform_fun: Function that takes a value and a variant_level
1277
and transforms it to a D-Bus type.
1278
dbus_name: D-Bus name of the variable
1279
type_func: Function that transform the value before sending it
1280
to the D-Bus. Default: no transform
1281
variant_level: D-Bus variant level. Default: 1
1282
"""
1283
attrname = "_{}".format(dbus_name)
1284
1285
def setter(self, value):
1286
if hasattr(self, "dbus_object_path"):
1287
if (not hasattr(self, attrname) or
1288
type_func(getattr(self, attrname, None))
1289
!= type_func(value)):
1290
if invalidate_only:
1291
self.PropertiesChanged(
1292
_interface, dbus.Dictionary(),
1293
dbus.Array((dbus_name, )))
1294
else:
1295
dbus_value = transform_func(
1296
type_func(value),
1297
variant_level = variant_level)
1298
self.PropertyChanged(dbus.String(dbus_name),
1299
dbus_value)
1300
self.PropertiesChanged(
1301
_interface,
1302
dbus.Dictionary({ dbus.String(dbus_name):
1303
dbus_value }),
1304
dbus.Array())
1305
setattr(self, attrname, value)
1306
1307
return property(lambda self: getattr(self, attrname), setter)
1308
1309
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1310
approvals_pending = notifychangeproperty(dbus.Boolean,
1311
"ApprovalPending",
1312
type_func = bool)
1313
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1314
last_enabled = notifychangeproperty(datetime_to_dbus,
1315
"LastEnabled")
1316
checker = notifychangeproperty(
1317
dbus.Boolean, "CheckerRunning",
1318
type_func = lambda checker: checker is not None)
1319
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1320
"LastCheckedOK")
1321
last_checker_status = notifychangeproperty(dbus.Int16,
1322
"LastCheckerStatus")
1323
last_approval_request = notifychangeproperty(
1324
datetime_to_dbus, "LastApprovalRequest")
1325
approved_by_default = notifychangeproperty(dbus.Boolean,
1326
"ApprovedByDefault")
1327
approval_delay = notifychangeproperty(
1328
dbus.UInt64, "ApprovalDelay",
1329
type_func = lambda td: td.total_seconds() * 1000)
1330
approval_duration = notifychangeproperty(
1331
dbus.UInt64, "ApprovalDuration",
1332
type_func = lambda td: td.total_seconds() * 1000)
1333
host = notifychangeproperty(dbus.String, "Host")
1334
timeout = notifychangeproperty(
1335
dbus.UInt64, "Timeout",
1336
type_func = lambda td: td.total_seconds() * 1000)
1337
extended_timeout = notifychangeproperty(
1338
dbus.UInt64, "ExtendedTimeout",
1339
type_func = lambda td: td.total_seconds() * 1000)
1340
interval = notifychangeproperty(
1341
dbus.UInt64, "Interval",
1342
type_func = lambda td: td.total_seconds() * 1000)
1343
checker_command = notifychangeproperty(dbus.String, "Checker")
1344
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1345
invalidate_only=True)
1346
1347
del notifychangeproperty
1348
1349
def __del__(self, *args, **kwargs):
1350
try:
1351
self.remove_from_connection()
1352
except LookupError:
1353
pass
1354
if hasattr(DBusObjectWithProperties, "__del__"):
1355
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1356
Client.__del__(self, *args, **kwargs)
1357
1358
def checker_callback(self, pid, condition, command,
1359
*args, **kwargs):
1360
self.checker_callback_tag = None
1361
self.checker = None
1362
if os.WIFEXITED(condition):
1363
exitstatus = os.WEXITSTATUS(condition)
1364
# Emit D-Bus signal
1365
self.CheckerCompleted(dbus.Int16(exitstatus),
1366
dbus.Int64(condition),
1367
dbus.String(command))
1368
else:
1369
# Emit D-Bus signal
1370
self.CheckerCompleted(dbus.Int16(-1),
1371
dbus.Int64(condition),
1372
dbus.String(command))
1373
1374
return Client.checker_callback(self, pid, condition, command,
1375
*args, **kwargs)
1376
1377
def start_checker(self, *args, **kwargs):
1378
old_checker_pid = getattr(self.checker, "pid", None)
1379
r = Client.start_checker(self, *args, **kwargs)
1380
# Only if new checker process was started
1381
if (self.checker is not None
1382
and old_checker_pid != self.checker.pid):
1383
# Emit D-Bus signal
1384
self.CheckerStarted(self.current_checker_command)
1385
return r
1386
1387
def _reset_approved(self):
1388
self.approved = None
1389
return False
1390
1391
def approve(self, value=True):
1392
self.approved = value
1393
gobject.timeout_add(int(self.approval_duration.total_seconds()
1394
* 1000), self._reset_approved)
1395
self.send_changedstate()
1396
1397
## D-Bus methods, signals & properties
1398
1399
## Interfaces
1400
1401
## Signals
1402
1403
# CheckerCompleted - signal
1404
@dbus.service.signal(_interface, signature="nxs")
1405
def CheckerCompleted(self, exitcode, waitstatus, command):
1406
"D-Bus signal"
1407
pass
1408
1409
# CheckerStarted - signal
1410
@dbus.service.signal(_interface, signature="s")
1411
def CheckerStarted(self, command):
1412
"D-Bus signal"
1413
pass
1414
1415
# PropertyChanged - signal
1416
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1417
@dbus.service.signal(_interface, signature="sv")
1418
def PropertyChanged(self, property, value):
1419
"D-Bus signal"
1420
pass
1421
1422
# GotSecret - signal
1423
@dbus.service.signal(_interface)
1424
def GotSecret(self):
1425
"""D-Bus signal
1426
Is sent after a successful transfer of secret from the Mandos
1427
server to mandos-client
1428
"""
1429
pass
1430
1431
# Rejected - signal
1432
@dbus.service.signal(_interface, signature="s")
1433
def Rejected(self, reason):
1434
"D-Bus signal"
1435
pass
1436
1437
# NeedApproval - signal
1438
@dbus.service.signal(_interface, signature="tb")
1439
def NeedApproval(self, timeout, default):
1440
"D-Bus signal"
1441
return self.need_approval()
1442
1443
## Methods
1444
1445
# Approve - method
1446
@dbus.service.method(_interface, in_signature="b")
1447
def Approve(self, value):
1448
self.approve(value)
1449
1450
# CheckedOK - method
1451
@dbus.service.method(_interface)
1452
def CheckedOK(self):
1453
self.checked_ok()
1454
1455
# Enable - method
1456
@dbus.service.method(_interface)
1457
def Enable(self):
1458
"D-Bus method"
1459
self.enable()
1460
1461
# StartChecker - method
1462
@dbus.service.method(_interface)
1463
def StartChecker(self):
1464
"D-Bus method"
1465
self.start_checker()
1466
1467
# Disable - method
1468
@dbus.service.method(_interface)
1469
def Disable(self):
1470
"D-Bus method"
1471
self.disable()
1472
1473
# StopChecker - method
1474
@dbus.service.method(_interface)
1475
def StopChecker(self):
1476
self.stop_checker()
1477
1478
## Properties
1479
1480
# ApprovalPending - property
1481
@dbus_service_property(_interface, signature="b", access="read")
1482
def ApprovalPending_dbus_property(self):
1483
return dbus.Boolean(bool(self.approvals_pending))
1484
1485
# ApprovedByDefault - property
1486
@dbus_service_property(_interface,
1487
signature="b",
1488
access="readwrite")
1489
def ApprovedByDefault_dbus_property(self, value=None):
1490
if value is None: # get
1491
return dbus.Boolean(self.approved_by_default)
1492
self.approved_by_default = bool(value)
1493
1494
# ApprovalDelay - property
1495
@dbus_service_property(_interface,
1496
signature="t",
1497
access="readwrite")
1498
def ApprovalDelay_dbus_property(self, value=None):
1499
if value is None: # get
1500
return dbus.UInt64(self.approval_delay.total_seconds()
1501
* 1000)
1502
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1503
1504
# ApprovalDuration - property
1505
@dbus_service_property(_interface,
1506
signature="t",
1507
access="readwrite")
1508
def ApprovalDuration_dbus_property(self, value=None):
1509
if value is None: # get
1510
return dbus.UInt64(self.approval_duration.total_seconds()
1511
* 1000)
1512
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1513
1514
# Name - property
1515
@dbus_service_property(_interface, signature="s", access="read")
1516
def Name_dbus_property(self):
1517
return dbus.String(self.name)
1518
1519
# Fingerprint - property
1520
@dbus_service_property(_interface, signature="s", access="read")
1521
def Fingerprint_dbus_property(self):
1522
return dbus.String(self.fingerprint)
1523
1524
# Host - property
1525
@dbus_service_property(_interface,
1526
signature="s",
1527
access="readwrite")
1528
def Host_dbus_property(self, value=None):
1529
if value is None: # get
1530
return dbus.String(self.host)
1531
self.host = str(value)
1532
1533
# Created - property
1534
@dbus_service_property(_interface, signature="s", access="read")
1535
def Created_dbus_property(self):
1536
return datetime_to_dbus(self.created)
1537
1538
# LastEnabled - property
1539
@dbus_service_property(_interface, signature="s", access="read")
1540
def LastEnabled_dbus_property(self):
1541
return datetime_to_dbus(self.last_enabled)
1542
1543
# Enabled - property
1544
@dbus_service_property(_interface,
1545
signature="b",
1546
access="readwrite")
1547
def Enabled_dbus_property(self, value=None):
1548
if value is None: # get
1549
return dbus.Boolean(self.enabled)
1550
if value:
1551
self.enable()
1552
else:
1553
self.disable()
1554
1555
# LastCheckedOK - property
1556
@dbus_service_property(_interface,
1557
signature="s",
1558
access="readwrite")
1559
def LastCheckedOK_dbus_property(self, value=None):
1560
if value is not None:
1561
self.checked_ok()
1562
return
1563
return datetime_to_dbus(self.last_checked_ok)
1564
1565
# LastCheckerStatus - property
1566
@dbus_service_property(_interface, signature="n", access="read")
1567
def LastCheckerStatus_dbus_property(self):
1568
return dbus.Int16(self.last_checker_status)
1569
1570
# Expires - property
1571
@dbus_service_property(_interface, signature="s", access="read")
1572
def Expires_dbus_property(self):
1573
return datetime_to_dbus(self.expires)
1574
1575
# LastApprovalRequest - property
1576
@dbus_service_property(_interface, signature="s", access="read")
1577
def LastApprovalRequest_dbus_property(self):
1578
return datetime_to_dbus(self.last_approval_request)
1579
1580
# Timeout - property
1581
@dbus_service_property(_interface,
1582
signature="t",
1583
access="readwrite")
1584
def Timeout_dbus_property(self, value=None):
1585
if value is None: # get
1586
return dbus.UInt64(self.timeout.total_seconds() * 1000)
1587
old_timeout = self.timeout
1588
self.timeout = datetime.timedelta(0, 0, 0, value)
1589
# Reschedule disabling
1590
if self.enabled:
1591
now = datetime.datetime.utcnow()
1592
self.expires += self.timeout - old_timeout
1593
if self.expires <= now:
1594
# The timeout has passed
1595
self.disable()
1596
else:
1597
if (getattr(self, "disable_initiator_tag", None)
1598
is None):
1599
return
1600
gobject.source_remove(self.disable_initiator_tag)
1601
self.disable_initiator_tag = gobject.timeout_add(
1602
int((self.expires - now).total_seconds() * 1000),
1603
self.disable)
1604
1605
# ExtendedTimeout - property
1606
@dbus_service_property(_interface,
1607
signature="t",
1608
access="readwrite")
1609
def ExtendedTimeout_dbus_property(self, value=None):
1610
if value is None: # get
1611
return dbus.UInt64(self.extended_timeout.total_seconds()
1612
* 1000)
1613
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1614
1615
# Interval - property
1616
@dbus_service_property(_interface,
1617
signature="t",
1618
access="readwrite")
1619
def Interval_dbus_property(self, value=None):
1620
if value is None: # get
1621
return dbus.UInt64(self.interval.total_seconds() * 1000)
1622
self.interval = datetime.timedelta(0, 0, 0, value)
1623
if getattr(self, "checker_initiator_tag", None) is None:
1624
return
1625
if self.enabled:
1626
# Reschedule checker run
1627
gobject.source_remove(self.checker_initiator_tag)
1628
self.checker_initiator_tag = gobject.timeout_add(
1629
value, self.start_checker)
1630
self.start_checker() # Start one now, too
1631
1632
# Checker - property
1633
@dbus_service_property(_interface,
1634
signature="s",
1635
access="readwrite")
1636
def Checker_dbus_property(self, value=None):
1637
if value is None: # get
1638
return dbus.String(self.checker_command)
1639
self.checker_command = str(value)
1640
1641
# CheckerRunning - property
1642
@dbus_service_property(_interface,
1643
signature="b",
1644
access="readwrite")
1645
def CheckerRunning_dbus_property(self, value=None):
1646
if value is None: # get
1647
return dbus.Boolean(self.checker is not None)
1648
if value:
1649
self.start_checker()
1650
else:
1651
self.stop_checker()
1652
1653
# ObjectPath - property
1654
@dbus_service_property(_interface, signature="o", access="read")
1655
def ObjectPath_dbus_property(self):
1656
return self.dbus_object_path # is already a dbus.ObjectPath
1657
1658
# Secret = property
1659
@dbus_service_property(_interface,
1660
signature="ay",
1661
access="write",
1662
byte_arrays=True)
1663
def Secret_dbus_property(self, value):
1664
self.secret = bytes(value)
1665
1666
del _interface
1667
1668
1669
class ProxyClient(object):
1670
def __init__(self, child_pipe, fpr, address):
1671
self._pipe = child_pipe
1672
self._pipe.send(('init', fpr, address))
1673
if not self._pipe.recv():
1674
raise KeyError()
1675
1676
def __getattribute__(self, name):
1677
if name == '_pipe':
1678
return super(ProxyClient, self).__getattribute__(name)
1679
self._pipe.send(('getattr', name))
1680
data = self._pipe.recv()
1681
if data[0] == 'data':
1682
return data[1]
1683
if data[0] == 'function':
1684
1685
def func(*args, **kwargs):
1686
self._pipe.send(('funcall', name, args, kwargs))
1687
return self._pipe.recv()[1]
1688
1689
return func
1690
1691
def __setattr__(self, name, value):
1692
if name == '_pipe':
1693
return super(ProxyClient, self).__setattr__(name, value)
1694
self._pipe.send(('setattr', name, value))
1695
1696
1697
class ClientHandler(socketserver.BaseRequestHandler, object):
1698
"""A class to handle client connections.
1699
1700
Instantiated once for each connection to handle it.
427
1701
Note: This will run in its own forked process."""
428
1702
429
1703
def handle(self):
430
logger.info(u"TCP connection from: %s",
431
unicode(self.client_address))
432
session = gnutls.connection.ClientSession\
433
(self.request, gnutls.connection.X509Credentials())
434
435
line = self.request.makefile().readline()
436
logger.debug(u"Protocol version: %r", line)
437
try:
438
if int(line.strip().split()[0]) > 1:
439
raise RuntimeError
440
except (ValueError, IndexError, RuntimeError), error:
441
logger.error(u"Unknown protocol version: %s", error)
442
return
443
444
# Note: gnutls.connection.X509Credentials is really a generic
445
# GnuTLS certificate credentials object so long as no X.509
446
# keys are added to it. Therefore, we can use it here despite
447
# using OpenPGP certificates.
448
449
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
450
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
451
# "+DHE-DSS"))
452
priority = "NORMAL" # Fallback default, since this
453
# MUST be set.
454
if self.server.settings["priority"]:
455
priority = self.server.settings["priority"]
456
gnutls.library.functions.gnutls_priority_set_direct\
457
(session._c_object, priority, None);
458
459
try:
460
session.handshake()
461
except gnutls.errors.GNUTLSError, error:
462
logger.warning(u"Handshake failed: %s", error)
463
# Do not run session.bye() here: the session is not
464
# established. Just abandon the request.
465
return
466
try:
467
fpr = fingerprint(peer_certificate(session))
468
except (TypeError, gnutls.errors.GNUTLSError), error:
469
logger.warning(u"Bad certificate: %s", error)
470
session.bye()
471
return
472
logger.debug(u"Fingerprint: %s", fpr)
473
client = None
474
for c in self.server.clients:
475
if c.fingerprint == fpr:
476
client = c
477
break
478
if not client:
479
logger.warning(u"Client not found for fingerprint: %s",
480
fpr)
481
session.bye()
482
return
483
# Have to check if client.still_valid(), since it is possible
484
# that the client timed out while establishing the GnuTLS
485
# session.
486
if not client.still_valid():
487
logger.warning(u"Client %(name)s is invalid",
488
vars(client))
489
session.bye()
490
return
491
sent_size = 0
492
while sent_size < len(client.secret):
493
sent = session.send(client.secret[sent_size:])
494
logger.debug(u"Sent: %d, remaining: %d",
495
sent, len(client.secret)
496
- (sent_size + sent))
497
sent_size += sent
498
session.bye()
499
500
501
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
502
"""IPv6 TCP server. Accepts 'None' as address and/or port.
1704
with contextlib.closing(self.server.child_pipe) as child_pipe:
1705
logger.info("TCP connection from: %s",
1706
str(self.client_address))
1707
logger.debug("Pipe FD: %d",
1708
self.server.child_pipe.fileno())
1709
1710
session = gnutls.connection.ClientSession(
1711
self.request, gnutls.connection .X509Credentials())
1712
1713
# Note: gnutls.connection.X509Credentials is really a
1714
# generic GnuTLS certificate credentials object so long as
1715
# no X.509 keys are added to it. Therefore, we can use it
1716
# here despite using OpenPGP certificates.
1717
1718
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1719
# "+AES-256-CBC", "+SHA1",
1720
# "+COMP-NULL", "+CTYPE-OPENPGP",
1721
# "+DHE-DSS"))
1722
# Use a fallback default, since this MUST be set.
1723
priority = self.server.gnutls_priority
1724
if priority is None:
1725
priority = "NORMAL"
1726
gnutls.library.functions.gnutls_priority_set_direct(
1727
session._c_object, priority, None)
1728
1729
# Start communication using the Mandos protocol
1730
# Get protocol number
1731
line = self.request.makefile().readline()
1732
logger.debug("Protocol version: %r", line)
1733
try:
1734
if int(line.strip().split()[0]) > 1:
1735
raise RuntimeError(line)
1736
except (ValueError, IndexError, RuntimeError) as error:
1737
logger.error("Unknown protocol version: %s", error)
1738
return
1739
1740
# Start GnuTLS connection
1741
try:
1742
session.handshake()
1743
except gnutls.errors.GNUTLSError as error:
1744
logger.warning("Handshake failed: %s", error)
1745
# Do not run session.bye() here: the session is not
1746
# established. Just abandon the request.
1747
return
1748
logger.debug("Handshake succeeded")
1749
1750
approval_required = False
1751
try:
1752
try:
1753
fpr = self.fingerprint(
1754
self.peer_certificate(session))
1755
except (TypeError,
1756
gnutls.errors.GNUTLSError) as error:
1757
logger.warning("Bad certificate: %s", error)
1758
return
1759
logger.debug("Fingerprint: %s", fpr)
1760
1761
try:
1762
client = ProxyClient(child_pipe, fpr,
1763
self.client_address)
1764
except KeyError:
1765
return
1766
1767
if client.approval_delay:
1768
delay = client.approval_delay
1769
client.approvals_pending += 1
1770
approval_required = True
1771
1772
while True:
1773
if not client.enabled:
1774
logger.info("Client %s is disabled",
1775
client.name)
1776
if self.server.use_dbus:
1777
# Emit D-Bus signal
1778
client.Rejected("Disabled")
1779
return
1780
1781
if client.approved or not client.approval_delay:
1782
#We are approved or approval is disabled
1783
break
1784
elif client.approved is None:
1785
logger.info("Client %s needs approval",
1786
client.name)
1787
if self.server.use_dbus:
1788
# Emit D-Bus signal
1789
client.NeedApproval(
1790
client.approval_delay.total_seconds()
1791
* 1000, client.approved_by_default)
1792
else:
1793
logger.warning("Client %s was not approved",
1794
client.name)
1795
if self.server.use_dbus:
1796
# Emit D-Bus signal
1797
client.Rejected("Denied")
1798
return
1799
1800
#wait until timeout or approved
1801
time = datetime.datetime.now()
1802
client.changedstate.acquire()
1803
client.changedstate.wait(delay.total_seconds())
1804
client.changedstate.release()
1805
time2 = datetime.datetime.now()
1806
if (time2 - time) >= delay:
1807
if not client.approved_by_default:
1808
logger.warning("Client %s timed out while"
1809
" waiting for approval",
1810
client.name)
1811
if self.server.use_dbus:
1812
# Emit D-Bus signal
1813
client.Rejected("Approval timed out")
1814
return
1815
else:
1816
break
1817
else:
1818
delay -= time2 - time
1819
1820
sent_size = 0
1821
while sent_size < len(client.secret):
1822
try:
1823
sent = session.send(client.secret[sent_size:])
1824
except gnutls.errors.GNUTLSError as error:
1825
logger.warning("gnutls send failed",
1826
exc_info=error)
1827
return
1828
logger.debug("Sent: %d, remaining: %d", sent,
1829
len(client.secret) - (sent_size
1830
+ sent))
1831
sent_size += sent
1832
1833
logger.info("Sending secret to %s", client.name)
1834
# bump the timeout using extended_timeout
1835
client.bump_timeout(client.extended_timeout)
1836
if self.server.use_dbus:
1837
# Emit D-Bus signal
1838
client.GotSecret()
1839
1840
finally:
1841
if approval_required:
1842
client.approvals_pending -= 1
1843
try:
1844
session.bye()
1845
except gnutls.errors.GNUTLSError as error:
1846
logger.warning("GnuTLS bye failed",
1847
exc_info=error)
1848
1849
@staticmethod
1850
def peer_certificate(session):
1851
"Return the peer's OpenPGP certificate as a bytestring"
1852
# If not an OpenPGP certificate...
1853
if (gnutls.library.functions.gnutls_certificate_type_get(
1854
session._c_object)
1855
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1856
# ...do the normal thing
1857
return session.peer_certificate
1858
list_size = ctypes.c_uint(1)
1859
cert_list = (gnutls.library.functions
1860
.gnutls_certificate_get_peers
1861
(session._c_object, ctypes.byref(list_size)))
1862
if not bool(cert_list) and list_size.value != 0:
1863
raise gnutls.errors.GNUTLSError("error getting peer"
1864
" certificate")
1865
if list_size.value == 0:
1866
return None
1867
cert = cert_list[0]
1868
return ctypes.string_at(cert.data, cert.size)
1869
1870
@staticmethod
1871
def fingerprint(openpgp):
1872
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1873
# New GnuTLS "datum" with the OpenPGP public key
1874
datum = gnutls.library.types.gnutls_datum_t(
1875
ctypes.cast(ctypes.c_char_p(openpgp),
1876
ctypes.POINTER(ctypes.c_ubyte)),
1877
ctypes.c_uint(len(openpgp)))
1878
# New empty GnuTLS certificate
1879
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1880
gnutls.library.functions.gnutls_openpgp_crt_init(
1881
ctypes.byref(crt))
1882
# Import the OpenPGP public key into the certificate
1883
gnutls.library.functions.gnutls_openpgp_crt_import(
1884
crt, ctypes.byref(datum),
1885
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
1886
# Verify the self signature in the key
1887
crtverify = ctypes.c_uint()
1888
gnutls.library.functions.gnutls_openpgp_crt_verify_self(
1889
crt, 0, ctypes.byref(crtverify))
1890
if crtverify.value != 0:
1891
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1892
raise gnutls.errors.CertificateSecurityError(
1893
"Verify failed")
1894
# New buffer for the fingerprint
1895
buf = ctypes.create_string_buffer(20)
1896
buf_len = ctypes.c_size_t()
1897
# Get the fingerprint from the certificate into the buffer
1898
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint(
1899
crt, ctypes.byref(buf), ctypes.byref(buf_len))
1900
# Deinit the certificate
1901
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1902
# Convert the buffer to a Python bytestring
1903
fpr = ctypes.string_at(buf, buf_len.value)
1904
# Convert the bytestring to hexadecimal notation
1905
hex_fpr = binascii.hexlify(fpr).upper()
1906
return hex_fpr
1907
1908
1909
class MultiprocessingMixIn(object):
1910
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1911
1912
def sub_process_main(self, request, address):
1913
try:
1914
self.finish_request(request, address)
1915
except Exception:
1916
self.handle_error(request, address)
1917
self.close_request(request)
1918
1919
def process_request(self, request, address):
1920
"""Start a new process to process the request."""
1921
proc = multiprocessing.Process(target = self.sub_process_main,
1922
args = (request, address))
1923
proc.start()
1924
return proc
1925
1926
1927
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1928
""" adds a pipe to the MixIn """
1929
1930
def process_request(self, request, client_address):
1931
"""Overrides and wraps the original process_request().
1932
1933
This function creates a new pipe in self.pipe
1934
"""
1935
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1936
1937
proc = MultiprocessingMixIn.process_request(self, request,
1938
client_address)
1939
self.child_pipe.close()
1940
self.add_pipe(parent_pipe, proc)
1941
1942
def add_pipe(self, parent_pipe, proc):
1943
"""Dummy function; override as necessary"""
1944
raise NotImplementedError()
1945
1946
1947
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1948
socketserver.TCPServer, object):
1949
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1950
503
1951
Attributes:
504
settings: Server settings
505
clients: Set() of Client objects
1952
enabled: Boolean; whether this server is activated yet
1953
interface: None or a network interface name (string)
1954
use_ipv6: Boolean; to use IPv6 or not
506
1955
"""
507
address_family = socket.AF_INET6
508
def __init__(self, *args, **kwargs):
509
if "settings" in kwargs:
510
self.settings = kwargs["settings"]
511
del kwargs["settings"]
512
if "clients" in kwargs:
513
self.clients = kwargs["clients"]
514
del kwargs["clients"]
515
return super(type(self), self).__init__(*args, **kwargs)
1956
1957
def __init__(self, server_address, RequestHandlerClass,
1958
interface=None,
1959
use_ipv6=True,
1960
socketfd=None):
1961
"""If socketfd is set, use that file descriptor instead of
1962
creating a new one with socket.socket().
1963
"""
1964
self.interface = interface
1965
if use_ipv6:
1966
self.address_family = socket.AF_INET6
1967
if socketfd is not None:
1968
# Save the file descriptor
1969
self.socketfd = socketfd
1970
# Save the original socket.socket() function
1971
self.socket_socket = socket.socket
1972
# To implement --socket, we monkey patch socket.socket.
1973
#
1974
# (When socketserver.TCPServer is a new-style class, we
1975
# could make self.socket into a property instead of monkey
1976
# patching socket.socket.)
1977
#
1978
# Create a one-time-only replacement for socket.socket()
1979
@functools.wraps(socket.socket)
1980
def socket_wrapper(*args, **kwargs):
1981
# Restore original function so subsequent calls are
1982
# not affected.
1983
socket.socket = self.socket_socket
1984
del self.socket_socket
1985
# This time only, return a new socket object from the
1986
# saved file descriptor.
1987
return socket.fromfd(self.socketfd, *args, **kwargs)
1988
# Replace socket.socket() function with wrapper
1989
socket.socket = socket_wrapper
1990
# The socketserver.TCPServer.__init__ will call
1991
# socket.socket(), which might be our replacement,
1992
# socket_wrapper(), if socketfd was set.
1993
socketserver.TCPServer.__init__(self, server_address,
1994
RequestHandlerClass)
1995
516
1996
def server_bind(self):
517
1997
"""This overrides the normal server_bind() function
518
1998
to bind to an interface if one was specified, and also NOT to
519
1999
bind to an address or port if they were not specified."""
520
if self.settings["interface"]:
521
# 25 is from /usr/include/asm-i486/socket.h
522
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
523
try:
524
self.socket.setsockopt(socket.SOL_SOCKET,
525
SO_BINDTODEVICE,
526
self.settings["interface"])
527
except socket.error, error:
528
if error[0] == errno.EPERM:
529
logger.error(u"No permission to"
530
u" bind to interface %s",
531
self.settings["interface"])
532
else:
533
raise error
2000
if self.interface is not None:
2001
if SO_BINDTODEVICE is None:
2002
logger.error("SO_BINDTODEVICE does not exist;"
2003
" cannot bind to interface %s",
2004
self.interface)
2005
else:
2006
try:
2007
self.socket.setsockopt(
2008
socket.SOL_SOCKET, SO_BINDTODEVICE,
2009
(self.interface + "\0").encode("utf-8"))
2010
except socket.error as error:
2011
if error.errno == errno.EPERM:
2012
logger.error("No permission to bind to"
2013
" interface %s", self.interface)
2014
elif error.errno == errno.ENOPROTOOPT:
2015
logger.error("SO_BINDTODEVICE not available;"
2016
" cannot bind to interface %s",
2017
self.interface)
2018
elif error.errno == errno.ENODEV:
2019
logger.error("Interface %s does not exist,"
2020
" cannot bind", self.interface)
2021
else:
2022
raise
534
2023
# Only bind(2) the socket if we really need to.
535
2024
if self.server_address[0] or self.server_address[1]:
536
2025
if not self.server_address[0]:
537
in6addr_any = "::"
538
self.server_address = (in6addr_any,
2026
if self.address_family == socket.AF_INET6:
2027
any_address = "::" # in6addr_any
2028
else:
2029
any_address = "0.0.0.0" # INADDR_ANY
2030
self.server_address = (any_address,
539
2031
self.server_address[1])
540
2032
elif not self.server_address[1]:
541
self.server_address = (self.server_address[0],
542
0)
543
# if self.settings["interface"]:
2033
self.server_address = (self.server_address[0], 0)
2034
# if self.interface:
544
2035
# self.server_address = (self.server_address[0],
545
2036
# 0, # port
546
2037
# 0, # flowinfo
547
2038
# if_nametoindex
548
# (self.settings
549
# ["interface"]))
550
return super(type(self), self).server_bind()
2039
# (self.interface))
2040
return socketserver.TCPServer.server_bind(self)
2041
2042
2043
class MandosServer(IPv6_TCPServer):
2044
"""Mandos server.
2045
2046
Attributes:
2047
clients: set of Client objects
2048
gnutls_priority GnuTLS priority string
2049
use_dbus: Boolean; to emit D-Bus signals or not
2050
2051
Assumes a gobject.MainLoop event loop.
2052
"""
2053
2054
def __init__(self, server_address, RequestHandlerClass,
2055
interface=None,
2056
use_ipv6=True,
2057
clients=None,
2058
gnutls_priority=None,
2059
use_dbus=True,
2060
socketfd=None):
2061
self.enabled = False
2062
self.clients = clients
2063
if self.clients is None:
2064
self.clients = {}
2065
self.use_dbus = use_dbus
2066
self.gnutls_priority = gnutls_priority
2067
IPv6_TCPServer.__init__(self, server_address,
2068
RequestHandlerClass,
2069
interface = interface,
2070
use_ipv6 = use_ipv6,
2071
socketfd = socketfd)
2072
2073
def server_activate(self):
2074
if self.enabled:
2075
return socketserver.TCPServer.server_activate(self)
2076
2077
def enable(self):
2078
self.enabled = True
2079
2080
def add_pipe(self, parent_pipe, proc):
2081
# Call "handle_ipc" for both data and EOF events
2082
gobject.io_add_watch(
2083
parent_pipe.fileno(),
2084
gobject.IO_IN | gobject.IO_HUP,
2085
functools.partial(self.handle_ipc,
2086
parent_pipe = parent_pipe,
2087
proc = proc))
2088
2089
def handle_ipc(self, source, condition,
2090
parent_pipe=None,
2091
proc = None,
2092
client_object=None):
2093
# error, or the other end of multiprocessing.Pipe has closed
2094
if condition & (gobject.IO_ERR | gobject.IO_HUP):
2095
# Wait for other process to exit
2096
proc.join()
2097
return False
2098
2099
# Read a request from the child
2100
request = parent_pipe.recv()
2101
command = request[0]
2102
2103
if command == 'init':
2104
fpr = request[1]
2105
address = request[2]
2106
2107
for c in self.clients.itervalues():
2108
if c.fingerprint == fpr:
2109
client = c
2110
break
2111
else:
2112
logger.info("Client not found for fingerprint: %s, ad"
2113
"dress: %s", fpr, address)
2114
if self.use_dbus:
2115
# Emit D-Bus signal
2116
mandos_dbus_service.ClientNotFound(fpr,
2117
address[0])
2118
parent_pipe.send(False)
2119
return False
2120
2121
gobject.io_add_watch(
2122
parent_pipe.fileno(),
2123
gobject.IO_IN | gobject.IO_HUP,
2124
functools.partial(self.handle_ipc,
2125
parent_pipe = parent_pipe,
2126
proc = proc,
2127
client_object = client))
2128
parent_pipe.send(True)
2129
# remove the old hook in favor of the new above hook on
2130
# same fileno
2131
return False
2132
if command == 'funcall':
2133
funcname = request[1]
2134
args = request[2]
2135
kwargs = request[3]
2136
2137
parent_pipe.send(('data', getattr(client_object,
2138
funcname)(*args,
2139
**kwargs)))
2140
2141
if command == 'getattr':
2142
attrname = request[1]
2143
if callable(client_object.__getattribute__(attrname)):
2144
parent_pipe.send(('function', ))
2145
else:
2146
parent_pipe.send((
2147
'data', client_object.__getattribute__(attrname)))
2148
2149
if command == 'setattr':
2150
attrname = request[1]
2151
value = request[2]
2152
setattr(client_object, attrname, value)
2153
2154
return True
2155
2156
2157
def rfc3339_duration_to_delta(duration):
2158
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2159
2160
>>> rfc3339_duration_to_delta("P7D")
2161
datetime.timedelta(7)
2162
>>> rfc3339_duration_to_delta("PT60S")
2163
datetime.timedelta(0, 60)
2164
>>> rfc3339_duration_to_delta("PT60M")
2165
datetime.timedelta(0, 3600)
2166
>>> rfc3339_duration_to_delta("PT24H")
2167
datetime.timedelta(1)
2168
>>> rfc3339_duration_to_delta("P1W")
2169
datetime.timedelta(7)
2170
>>> rfc3339_duration_to_delta("PT5M30S")
2171
datetime.timedelta(0, 330)
2172
>>> rfc3339_duration_to_delta("P1DT3M20S")
2173
datetime.timedelta(1, 200)
2174
"""
2175
2176
# Parsing an RFC 3339 duration with regular expressions is not
2177
# possible - there would have to be multiple places for the same
2178
# values, like seconds. The current code, while more esoteric, is
2179
# cleaner without depending on a parsing library. If Python had a
2180
# built-in library for parsing we would use it, but we'd like to
2181
# avoid excessive use of external libraries.
2182
2183
# New type for defining tokens, syntax, and semantics all-in-one
2184
Token = collections.namedtuple("Token",
2185
("regexp", # To match token; if
2186
# "value" is not None,
2187
# must have a "group"
2188
# containing digits
2189
"value", # datetime.timedelta or
2190
# None
2191
"followers")) # Tokens valid after
2192
# this token
2193
Token = collections.namedtuple("Token", (
2194
"regexp", # To match token; if "value" is not None, must have
2195
# a "group" containing digits
2196
"value", # datetime.timedelta or None
2197
"followers")) # Tokens valid after this token
2198
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2199
# the "duration" ABNF definition in RFC 3339, Appendix A.
2200
token_end = Token(re.compile(r"$"), None, frozenset())
2201
token_second = Token(re.compile(r"(\d+)S"),
2202
datetime.timedelta(seconds=1),
2203
frozenset((token_end, )))
2204
token_minute = Token(re.compile(r"(\d+)M"),
2205
datetime.timedelta(minutes=1),
2206
frozenset((token_second, token_end)))
2207
token_hour = Token(re.compile(r"(\d+)H"),
2208
datetime.timedelta(hours=1),
2209
frozenset((token_minute, token_end)))
2210
token_time = Token(re.compile(r"T"),
2211
None,
2212
frozenset((token_hour, token_minute,
2213
token_second)))
2214
token_day = Token(re.compile(r"(\d+)D"),
2215
datetime.timedelta(days=1),
2216
frozenset((token_time, token_end)))
2217
token_month = Token(re.compile(r"(\d+)M"),
2218
datetime.timedelta(weeks=4),
2219
frozenset((token_day, token_end)))
2220
token_year = Token(re.compile(r"(\d+)Y"),
2221
datetime.timedelta(weeks=52),
2222
frozenset((token_month, token_end)))
2223
token_week = Token(re.compile(r"(\d+)W"),
2224
datetime.timedelta(weeks=1),
2225
frozenset((token_end, )))
2226
token_duration = Token(re.compile(r"P"), None,
2227
frozenset((token_year, token_month,
2228
token_day, token_time,
2229
token_week)))
2230
# Define starting values
2231
value = datetime.timedelta() # Value so far
2232
found_token = None
2233
followers = frozenset((token_duration,)) # Following valid tokens
2234
s = duration # String left to parse
2235
# Loop until end token is found
2236
while found_token is not token_end:
2237
# Search for any currently valid tokens
2238
for token in followers:
2239
match = token.regexp.match(s)
2240
if match is not None:
2241
# Token found
2242
if token.value is not None:
2243
# Value found, parse digits
2244
factor = int(match.group(1), 10)
2245
# Add to value so far
2246
value += factor * token.value
2247
# Strip token from string
2248
s = token.regexp.sub("", s, 1)
2249
# Go to found token
2250
found_token = token
2251
# Set valid next tokens
2252
followers = found_token.followers
2253
break
2254
else:
2255
# No currently valid tokens were found
2256
raise ValueError("Invalid RFC 3339 duration")
2257
# End token found
2258
return value
551
2259
552
2260
553
2261
def string_to_delta(interval):
554
2262
"""Parse a string and return a datetime.timedelta
555
2263
556
2264
>>> string_to_delta('7d')
557
2265
datetime.timedelta(7)
558
2266
>>> string_to_delta('60s')
561
2269
datetime.timedelta(0, 3600)
562
2270
>>> string_to_delta('24h')
563
2271
datetime.timedelta(1)
564
>>> string_to_delta(u'1w')
2272
>>> string_to_delta('1w')
565
2273
datetime.timedelta(7)
2274
>>> string_to_delta('5m 30s')
2275
datetime.timedelta(0, 330)
566
2276
"""
567
try:
568
suffix=unicode(interval[-1])
569
value=int(interval[:-1])
570
if suffix == u"d":
571
delta = datetime.timedelta(value)
572
elif suffix == u"s":
573
delta = datetime.timedelta(0, value)
574
elif suffix == u"m":
575
delta = datetime.timedelta(0, 0, 0, 0, value)
576
elif suffix == u"h":
577
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
578
elif suffix == u"w":
579
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
580
else:
581
raise ValueError
582
except (ValueError, IndexError):
583
raise ValueError
584
return delta
585
586
587
def server_state_changed(state):
588
"""Derived from the Avahi example code"""
589
if state == avahi.SERVER_COLLISION:
590
logger.error(u"Server name collision")
591
service.remove()
592
elif state == avahi.SERVER_RUNNING:
593
service.add()
594
595
596
def entry_group_state_changed(state, error):
597
"""Derived from the Avahi example code"""
598
logger.debug(u"state change: %i", state)
599
600
if state == avahi.ENTRY_GROUP_ESTABLISHED:
601
logger.debug(u"Service established.")
602
elif state == avahi.ENTRY_GROUP_COLLISION:
603
logger.warning(u"Service name collision.")
604
service.rename()
605
elif state == avahi.ENTRY_GROUP_FAILURE:
606
logger.critical(u"Error in group state changed %s",
607
unicode(error))
608
raise AvahiGroupError("State changed: %s", str(error))
609
610
def if_nametoindex(interface):
611
"""Call the C function if_nametoindex(), or equivalent"""
612
global if_nametoindex
613
try:
614
if "ctypes.util" not in sys.modules:
615
import ctypes.util
616
if_nametoindex = ctypes.cdll.LoadLibrary\
617
(ctypes.util.find_library("c")).if_nametoindex
618
except (OSError, AttributeError):
619
if "struct" not in sys.modules:
620
import struct
621
if "fcntl" not in sys.modules:
622
import fcntl
623
def if_nametoindex(interface):
624
"Get an interface index the hard way, i.e. using fcntl()"
625
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
626
s = socket.socket()
627
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
628
struct.pack("16s16x", interface))
629
s.close()
630
interface_index = struct.unpack("I", ifreq[16:20])[0]
631
return interface_index
632
return if_nametoindex(interface)
2277
2278
try:
2279
return rfc3339_duration_to_delta(interval)
2280
except ValueError:
2281
pass
2282
2283
timevalue = datetime.timedelta(0)
2284
for s in interval.split():
2285
try:
2286
suffix = s[-1]
2287
value = int(s[:-1])
2288
if suffix == "d":
2289
delta = datetime.timedelta(value)
2290
elif suffix == "s":
2291
delta = datetime.timedelta(0, value)
2292
elif suffix == "m":
2293
delta = datetime.timedelta(0, 0, 0, 0, value)
2294
elif suffix == "h":
2295
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
2296
elif suffix == "w":
2297
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
2298
else:
2299
raise ValueError("Unknown suffix {!r}".format(suffix))
2300
except IndexError as e:
2301
raise ValueError(*(e.args))
2302
timevalue += delta
2303
return timevalue
633
2304
634
2305
635
2306
def daemon(nochdir = False, noclose = False):
636
2307
"""See daemon(3). Standard BSD Unix function.
2308
637
2309
This should really exist as os.daemon, but it doesn't (yet)."""
638
2310
if os.fork():
639
2311
sys.exit()
644
2316
sys.exit()
645
2317
if not noclose:
646
2318
# Close all standard open file descriptors
647
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2319
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
648
2320
if not stat.S_ISCHR(os.fstat(null).st_mode):
649
2321
raise OSError(errno.ENODEV,
650
"/dev/null not a character device")
2322
"{} not a character device"
2323
.format(os.devnull))
651
2324
os.dup2(null, sys.stdin.fileno())
652
2325
os.dup2(null, sys.stdout.fileno())
653
2326
os.dup2(null, sys.stderr.fileno())
656
2329
657
2330
658
2331
def main():
659
global main_loop_started
660
main_loop_started = False
661
662
parser = OptionParser(version = "%%prog %s" % version)
663
parser.add_option("-i", "--interface", type="string",
664
metavar="IF", help="Bind to interface IF")
665
parser.add_option("-a", "--address", type="string",
666
help="Address to listen for requests on")
667
parser.add_option("-p", "--port", type="int",
668
help="Port number to receive requests on")
669
parser.add_option("--check", action="store_true", default=False,
670
help="Run self-test")
671
parser.add_option("--debug", action="store_true",
672
help="Debug mode; run in foreground and log to"
673
" terminal")
674
parser.add_option("--priority", type="string", help="GnuTLS"
675
" priority string (see GnuTLS documentation)")
676
parser.add_option("--servicename", type="string", metavar="NAME",
677
help="Zeroconf service name")
678
parser.add_option("--configdir", type="string",
679
default="/etc/mandos", metavar="DIR",
680
help="Directory to search for configuration"
681
" files")
682
(options, args) = parser.parse_args()
2332
2333
##################################################################
2334
# Parsing of options, both command line and config file
2335
2336
parser = argparse.ArgumentParser()
2337
parser.add_argument("-v", "--version", action="version",
2338
version = "%(prog)s {}".format(version),
2339
help="show version number and exit")
2340
parser.add_argument("-i", "--interface", metavar="IF",
2341
help="Bind to interface IF")
2342
parser.add_argument("-a", "--address",
2343
help="Address to listen for requests on")
2344
parser.add_argument("-p", "--port", type=int,
2345
help="Port number to receive requests on")
2346
parser.add_argument("--check", action="store_true",
2347
help="Run self-test")
2348
parser.add_argument("--debug", action="store_true",
2349
help="Debug mode; run in foreground and log"
2350
" to terminal", default=None)
2351
parser.add_argument("--debuglevel", metavar="LEVEL",
2352
help="Debug level for stdout output")
2353
parser.add_argument("--priority", help="GnuTLS"
2354
" priority string (see GnuTLS documentation)")
2355
parser.add_argument("--servicename",
2356
metavar="NAME", help="Zeroconf service name")
2357
parser.add_argument("--configdir",
2358
default="/etc/mandos", metavar="DIR",
2359
help="Directory to search for configuration"
2360
" files")
2361
parser.add_argument("--no-dbus", action="store_false",
2362
dest="use_dbus", help="Do not provide D-Bus"
2363
" system bus interface", default=None)
2364
parser.add_argument("--no-ipv6", action="store_false",
2365
dest="use_ipv6", help="Do not use IPv6",
2366
default=None)
2367
parser.add_argument("--no-restore", action="store_false",
2368
dest="restore", help="Do not restore stored"
2369
" state", default=None)
2370
parser.add_argument("--socket", type=int,
2371
help="Specify a file descriptor to a network"
2372
" socket to use instead of creating one")
2373
parser.add_argument("--statedir", metavar="DIR",
2374
help="Directory to save/restore state in")
2375
parser.add_argument("--foreground", action="store_true",
2376
help="Run in foreground", default=None)
2377
parser.add_argument("--no-zeroconf", action="store_false",
2378
dest="zeroconf", help="Do not use Zeroconf",
2379
default=None)
2380
2381
options = parser.parse_args()
683
2382
684
2383
if options.check:
685
2384
import doctest
686
doctest.testmod()
687
sys.exit()
2385
fail_count, test_count = doctest.testmod()
2386
sys.exit(os.EX_OK if fail_count == 0 else 1)
688
2387
689
2388
# Default values for config file for server-global settings
690
2389
server_defaults = { "interface": "",
692
2391
"port": "",
693
2392
"debug": "False",
694
2393
"priority":
695
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2394
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2395
":+SIGN-RSA-SHA224:+SIGN-RSA-RMD160",
696
2396
"servicename": "Mandos",
697
}
2397
"use_dbus": "True",
2398
"use_ipv6": "True",
2399
"debuglevel": "",
2400
"restore": "True",
2401
"socket": "",
2402
"statedir": "/var/lib/mandos",
2403
"foreground": "False",
2404
"zeroconf": "True",
2405
}
698
2406
699
2407
# Parse config file for server-global settings
700
server_config = ConfigParser.SafeConfigParser(server_defaults)
2408
server_config = configparser.SafeConfigParser(server_defaults)
701
2409
del server_defaults
702
2410
server_config.read(os.path.join(options.configdir, "mandos.conf"))
703
server_section = "server"
704
2411
# Convert the SafeConfigParser object to a dict
705
server_settings = dict(server_config.items(server_section))
706
# Use getboolean on the boolean config option
707
server_settings["debug"] = server_config.getboolean\
708
(server_section, "debug")
2412
server_settings = server_config.defaults()
2413
# Use the appropriate methods on the non-string config options
2414
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
2415
server_settings[option] = server_config.getboolean("DEFAULT",
2416
option)
2417
if server_settings["port"]:
2418
server_settings["port"] = server_config.getint("DEFAULT",
2419
"port")
2420
if server_settings["socket"]:
2421
server_settings["socket"] = server_config.getint("DEFAULT",
2422
"socket")
2423
# Later, stdin will, and stdout and stderr might, be dup'ed
2424
# over with an opened os.devnull. But we don't want this to
2425
# happen with a supplied network socket.
2426
if 0 <= server_settings["socket"] <= 2:
2427
server_settings["socket"] = os.dup(server_settings
2428
["socket"])
709
2429
del server_config
710
2430
711
2431
# Override the settings from the config file with command line
712
2432
# options, if set.
713
2433
for option in ("interface", "address", "port", "debug",
714
"priority", "servicename", "configdir"):
2434
"priority", "servicename", "configdir", "use_dbus",
2435
"use_ipv6", "debuglevel", "restore", "statedir",
2436
"socket", "foreground", "zeroconf"):
715
2437
value = getattr(options, option)
716
2438
if value is not None:
717
2439
server_settings[option] = value
718
2440
del options
2441
# Force all strings to be unicode
2442
for option in server_settings.keys():
2443
if isinstance(server_settings[option], bytes):
2444
server_settings[option] = (server_settings[option]
2445
.decode("utf-8"))
2446
# Force all boolean options to be boolean
2447
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2448
"foreground", "zeroconf"):
2449
server_settings[option] = bool(server_settings[option])
2450
# Debug implies foreground
2451
if server_settings["debug"]:
2452
server_settings["foreground"] = True
719
2453
# Now we have our good server settings in "server_settings"
720
2454
2455
##################################################################
2456
2457
if (not server_settings["zeroconf"]
2458
and not (server_settings["port"]
2459
or server_settings["socket"] != "")):
2460
parser.error("Needs port or socket to work without Zeroconf")
2461
2462
# For convenience
721
2463
debug = server_settings["debug"]
2464
debuglevel = server_settings["debuglevel"]
2465
use_dbus = server_settings["use_dbus"]
2466
use_ipv6 = server_settings["use_ipv6"]
2467
stored_state_path = os.path.join(server_settings["statedir"],
2468
stored_state_file)
2469
foreground = server_settings["foreground"]
2470
zeroconf = server_settings["zeroconf"]
722
2471
723
if not debug:
724
syslogger.setLevel(logging.WARNING)
725
console.setLevel(logging.WARNING)
2472
if debug:
2473
initlogger(debug, logging.DEBUG)
2474
else:
2475
if not debuglevel:
2476
initlogger(debug)
2477
else:
2478
level = getattr(logging, debuglevel.upper())
2479
initlogger(debug, level)
726
2480
727
2481
if server_settings["servicename"] != "Mandos":
728
syslogger.setFormatter(logging.Formatter\
729
('Mandos (%s): %%(levelname)s:'
730
' %%(message)s'
731
% server_settings["servicename"]))
2482
syslogger.setFormatter(
2483
logging.Formatter('Mandos ({}) [%(process)d]:'
2484
' %(levelname)s: %(message)s'.format(
2485
server_settings["servicename"])))
732
2486
733
2487
# Parse config file with clients
734
client_defaults = { "timeout": "1h",
735
"interval": "5m",
736
"checker": "fping -q -- %%(host)s",
737
}
738
client_config = ConfigParser.SafeConfigParser(client_defaults)
2488
client_config = configparser.SafeConfigParser(Client
2489
.client_defaults)
739
2490
client_config.read(os.path.join(server_settings["configdir"],
740
2491
"clients.conf"))
741
2492
742
global service
743
service = AvahiService(name = server_settings["servicename"],
744
type = "_mandos._tcp", );
745
if server_settings["interface"]:
746
service.interface = if_nametoindex(server_settings["interface"])
2493
global mandos_dbus_service
2494
mandos_dbus_service = None
2495
2496
socketfd = None
2497
if server_settings["socket"] != "":
2498
socketfd = server_settings["socket"]
2499
tcp_server = MandosServer(
2500
(server_settings["address"], server_settings["port"]),
2501
ClientHandler,
2502
interface=(server_settings["interface"] or None),
2503
use_ipv6=use_ipv6,
2504
gnutls_priority=server_settings["priority"],
2505
use_dbus=use_dbus,
2506
socketfd=socketfd)
2507
if not foreground:
2508
pidfilename = "/run/mandos.pid"
2509
if not os.path.isdir("/run/."):
2510
pidfilename = "/var/run/mandos.pid"
2511
pidfile = None
2512
try:
2513
pidfile = open(pidfilename, "w")
2514
except IOError as e:
2515
logger.error("Could not open file %r", pidfilename,
2516
exc_info=e)
2517
2518
for name in ("_mandos", "mandos", "nobody"):
2519
try:
2520
uid = pwd.getpwnam(name).pw_uid
2521
gid = pwd.getpwnam(name).pw_gid
2522
break
2523
except KeyError:
2524
continue
2525
else:
2526
uid = 65534
2527
gid = 65534
2528
try:
2529
os.setgid(gid)
2530
os.setuid(uid)
2531
except OSError as error:
2532
if error.errno != errno.EPERM:
2533
raise
2534
2535
if debug:
2536
# Enable all possible GnuTLS debugging
2537
2538
# "Use a log level over 10 to enable all debugging options."
2539
# - GnuTLS manual
2540
gnutls.library.functions.gnutls_global_set_log_level(11)
2541
2542
@gnutls.library.types.gnutls_log_func
2543
def debug_gnutls(level, string):
2544
logger.debug("GnuTLS: %s", string[:-1])
2545
2546
gnutls.library.functions.gnutls_global_set_log_function(
2547
debug_gnutls)
2548
2549
# Redirect stdin so all checkers get /dev/null
2550
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2551
os.dup2(null, sys.stdin.fileno())
2552
if null > 2:
2553
os.close(null)
2554
2555
# Need to fork before connecting to D-Bus
2556
if not foreground:
2557
# Close all input and output, do double fork, etc.
2558
daemon()
2559
2560
# multiprocessing will use threads, so before we use gobject we
2561
# need to inform gobject that threads will be used.
2562
gobject.threads_init()
747
2563
748
2564
global main_loop
749
global bus
750
global server
751
2565
# From the Avahi example code
752
DBusGMainLoop(set_as_default=True )
2566
DBusGMainLoop(set_as_default=True)
753
2567
main_loop = gobject.MainLoop()
754
2568
bus = dbus.SystemBus()
755
server = dbus.Interface(
756
bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
757
avahi.DBUS_INTERFACE_SERVER )
758
2569
# End of Avahi example code
759
760
clients = Set()
761
def remove_from_clients(client):
762
clients.remove(client)
763
if not clients:
764
logger.critical(u"No clients left, exiting")
765
sys.exit()
766
767
clients.update(Set(Client(name = section,
768
stop_hook = remove_from_clients,
769
config
770
= dict(client_config.items(section)))
771
for section in client_config.sections()))
772
if not clients:
773
logger.critical(u"No clients defined")
774
sys.exit(1)
775
776
if not debug:
777
logger.removeHandler(console)
778
daemon()
779
780
pidfilename = "/var/run/mandos/mandos.pid"
781
pid = os.getpid()
782
try:
783
pidfile = open(pidfilename, "w")
784
pidfile.write(str(pid) + "\n")
785
pidfile.close()
2570
if use_dbus:
2571
try:
2572
bus_name = dbus.service.BusName("se.recompile.Mandos",
2573
bus,
2574
do_not_queue=True)
2575
old_bus_name = dbus.service.BusName(
2576
"se.bsnet.fukt.Mandos", bus,
2577
do_not_queue=True)
2578
except dbus.exceptions.NameExistsException as e:
2579
logger.error("Disabling D-Bus:", exc_info=e)
2580
use_dbus = False
2581
server_settings["use_dbus"] = False
2582
tcp_server.use_dbus = False
2583
if zeroconf:
2584
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2585
service = AvahiServiceToSyslog(
2586
name = server_settings["servicename"],
2587
servicetype = "_mandos._tcp",
2588
protocol = protocol,
2589
bus = bus)
2590
if server_settings["interface"]:
2591
service.interface = if_nametoindex(
2592
server_settings["interface"].encode("utf-8"))
2593
2594
global multiprocessing_manager
2595
multiprocessing_manager = multiprocessing.Manager()
2596
2597
client_class = Client
2598
if use_dbus:
2599
client_class = functools.partial(ClientDBus, bus = bus)
2600
2601
client_settings = Client.config_parser(client_config)
2602
old_client_settings = {}
2603
clients_data = {}
2604
2605
# This is used to redirect stdout and stderr for checker processes
2606
global wnull
2607
wnull = open(os.devnull, "w") # A writable /dev/null
2608
# Only used if server is running in foreground but not in debug
2609
# mode
2610
if debug or not foreground:
2611
wnull.close()
2612
2613
# Get client data and settings from last running state.
2614
if server_settings["restore"]:
2615
try:
2616
with open(stored_state_path, "rb") as stored_state:
2617
clients_data, old_client_settings = pickle.load(
2618
stored_state)
2619
os.remove(stored_state_path)
2620
except IOError as e:
2621
if e.errno == errno.ENOENT:
2622
logger.warning("Could not load persistent state:"
2623
" {}".format(os.strerror(e.errno)))
2624
else:
2625
logger.critical("Could not load persistent state:",
2626
exc_info=e)
2627
raise
2628
except EOFError as e:
2629
logger.warning("Could not load persistent state: "
2630
"EOFError:",
2631
exc_info=e)
2632
2633
with PGPEngine() as pgp:
2634
for client_name, client in clients_data.items():
2635
# Skip removed clients
2636
if client_name not in client_settings:
2637
continue
2638
2639
# Decide which value to use after restoring saved state.
2640
# We have three different values: Old config file,
2641
# new config file, and saved state.
2642
# New config value takes precedence if it differs from old
2643
# config value, otherwise use saved state.
2644
for name, value in client_settings[client_name].items():
2645
try:
2646
# For each value in new config, check if it
2647
# differs from the old config value (Except for
2648
# the "secret" attribute)
2649
if (name != "secret"
2650
and (value !=
2651
old_client_settings[client_name][name])):
2652
client[name] = value
2653
except KeyError:
2654
pass
2655
2656
# Clients who has passed its expire date can still be
2657
# enabled if its last checker was successful. Clients
2658
# whose checker succeeded before we stored its state is
2659
# assumed to have successfully run all checkers during
2660
# downtime.
2661
if client["enabled"]:
2662
if datetime.datetime.utcnow() >= client["expires"]:
2663
if not client["last_checked_ok"]:
2664
logger.warning(
2665
"disabling client {} - Client never "
2666
"performed a successful checker".format(
2667
client_name))
2668
client["enabled"] = False
2669
elif client["last_checker_status"] != 0:
2670
logger.warning(
2671
"disabling client {} - Client last"
2672
" checker failed with error code"
2673
" {}".format(
2674
client_name,
2675
client["last_checker_status"]))
2676
client["enabled"] = False
2677
else:
2678
client["expires"] = (
2679
datetime.datetime.utcnow()
2680
+ client["timeout"])
2681
logger.debug("Last checker succeeded,"
2682
" keeping {} enabled".format(
2683
client_name))
2684
try:
2685
client["secret"] = pgp.decrypt(
2686
client["encrypted_secret"],
2687
client_settings[client_name]["secret"])
2688
except PGPError:
2689
# If decryption fails, we use secret from new settings
2690
logger.debug("Failed to decrypt {} old secret".format(
2691
client_name))
2692
client["secret"] = (client_settings[client_name]
2693
["secret"])
2694
2695
# Add/remove clients based on new changes made to config
2696
for client_name in (set(old_client_settings)
2697
- set(client_settings)):
2698
del clients_data[client_name]
2699
for client_name in (set(client_settings)
2700
- set(old_client_settings)):
2701
clients_data[client_name] = client_settings[client_name]
2702
2703
# Create all client objects
2704
for client_name, client in clients_data.items():
2705
tcp_server.clients[client_name] = client_class(
2706
name = client_name,
2707
settings = client,
2708
server_settings = server_settings)
2709
2710
if not tcp_server.clients:
2711
logger.warning("No clients defined")
2712
2713
if not foreground:
2714
if pidfile is not None:
2715
try:
2716
with pidfile:
2717
pid = os.getpid()
2718
pidfile.write("{}\n".format(pid).encode("utf-8"))
2719
except IOError:
2720
logger.error("Could not write to file %r with PID %d",
2721
pidfilename, pid)
786
2722
del pidfile
787
except IOError, err:
788
logger.error(u"Could not write %s file with PID %d",
789
pidfilename, os.getpid())
2723
del pidfilename
2724
2725
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2726
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2727
2728
if use_dbus:
2729
2730
@alternate_dbus_interfaces(
2731
{ "se.recompile.Mandos": "se.bsnet.fukt.Mandos" })
2732
class MandosDBusService(DBusObjectWithProperties):
2733
"""A D-Bus proxy object"""
2734
2735
def __init__(self):
2736
dbus.service.Object.__init__(self, bus, "/")
2737
2738
_interface = "se.recompile.Mandos"
2739
2740
@dbus_interface_annotations(_interface)
2741
def _foo(self):
2742
return {
2743
"org.freedesktop.DBus.Property.EmitsChangedSignal":
2744
"false" }
2745
2746
@dbus.service.signal(_interface, signature="o")
2747
def ClientAdded(self, objpath):
2748
"D-Bus signal"
2749
pass
2750
2751
@dbus.service.signal(_interface, signature="ss")
2752
def ClientNotFound(self, fingerprint, address):
2753
"D-Bus signal"
2754
pass
2755
2756
@dbus.service.signal(_interface, signature="os")
2757
def ClientRemoved(self, objpath, name):
2758
"D-Bus signal"
2759
pass
2760
2761
@dbus.service.method(_interface, out_signature="ao")
2762
def GetAllClients(self):
2763
"D-Bus method"
2764
return dbus.Array(c.dbus_object_path for c in
2765
tcp_server.clients.itervalues())
2766
2767
@dbus.service.method(_interface,
2768
out_signature="a{oa{sv}}")
2769
def GetAllClientsWithProperties(self):
2770
"D-Bus method"
2771
return dbus.Dictionary(
2772
{ c.dbus_object_path: c.GetAll("")
2773
for c in tcp_server.clients.itervalues() },
2774
signature="oa{sv}")
2775
2776
@dbus.service.method(_interface, in_signature="o")
2777
def RemoveClient(self, object_path):
2778
"D-Bus method"
2779
for c in tcp_server.clients.itervalues():
2780
if c.dbus_object_path == object_path:
2781
del tcp_server.clients[c.name]
2782
c.remove_from_connection()
2783
# Don't signal anything except ClientRemoved
2784
c.disable(quiet=True)
2785
# Emit D-Bus signal
2786
self.ClientRemoved(object_path, c.name)
2787
return
2788
raise KeyError(object_path)
2789
2790
del _interface
2791
2792
mandos_dbus_service = MandosDBusService()
790
2793
791
2794
def cleanup():
792
2795
"Cleanup function; run on exit"
793
global group
794
# From the Avahi example code
795
if not group is None:
796
group.Free()
797
group = None
798
# End of Avahi example code
799
800
while clients:
801
client = clients.pop()
802
client.stop_hook = None
803
client.stop()
2796
if zeroconf:
2797
service.cleanup()
2798
2799
multiprocessing.active_children()
2800
wnull.close()
2801
if not (tcp_server.clients or client_settings):
2802
return
2803
2804
# Store client before exiting. Secrets are encrypted with key
2805
# based on what config file has. If config file is
2806
# removed/edited, old secret will thus be unrecovable.
2807
clients = {}
2808
with PGPEngine() as pgp:
2809
for client in tcp_server.clients.itervalues():
2810
key = client_settings[client.name]["secret"]
2811
client.encrypted_secret = pgp.encrypt(client.secret,
2812
key)
2813
client_dict = {}
2814
2815
# A list of attributes that can not be pickled
2816
# + secret.
2817
exclude = { "bus", "changedstate", "secret",
2818
"checker", "server_settings" }
2819
for name, typ in inspect.getmembers(dbus.service
2820
.Object):
2821
exclude.add(name)
2822
2823
client_dict["encrypted_secret"] = (client
2824
.encrypted_secret)
2825
for attr in client.client_structure:
2826
if attr not in exclude:
2827
client_dict[attr] = getattr(client, attr)
2828
2829
clients[client.name] = client_dict
2830
del client_settings[client.name]["secret"]
2831
2832
try:
2833
with tempfile.NamedTemporaryFile(
2834
mode='wb',
2835
suffix=".pickle",
2836
prefix='clients-',
2837
dir=os.path.dirname(stored_state_path),
2838
delete=False) as stored_state:
2839
pickle.dump((clients, client_settings), stored_state)
2840
tempname = stored_state.name
2841
os.rename(tempname, stored_state_path)
2842
except (IOError, OSError) as e:
2843
if not debug:
2844
try:
2845
os.remove(tempname)
2846
except NameError:
2847
pass
2848
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
2849
logger.warning("Could not save persistent state: {}"
2850
.format(os.strerror(e.errno)))
2851
else:
2852
logger.warning("Could not save persistent state:",
2853
exc_info=e)
2854
raise
2855
2856
# Delete all clients, and settings from config
2857
while tcp_server.clients:
2858
name, client = tcp_server.clients.popitem()
2859
if use_dbus:
2860
client.remove_from_connection()
2861
# Don't signal anything except ClientRemoved
2862
client.disable(quiet=True)
2863
if use_dbus:
2864
# Emit D-Bus signal
2865
mandos_dbus_service.ClientRemoved(
2866
client.dbus_object_path, client.name)
2867
client_settings.clear()
804
2868
805
2869
atexit.register(cleanup)
806
2870
807
if not debug:
808
signal.signal(signal.SIGINT, signal.SIG_IGN)
809
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
810
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
811
812
for client in clients:
813
client.start()
814
815
tcp_server = IPv6_TCPServer((server_settings["address"],
816
server_settings["port"]),
817
tcp_handler,
818
settings=server_settings,
819
clients=clients)
2871
for client in tcp_server.clients.itervalues():
2872
if use_dbus:
2873
# Emit D-Bus signal
2874
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2875
# Need to initiate checking of clients
2876
if client.enabled:
2877
client.init_checker()
2878
2879
tcp_server.enable()
2880
tcp_server.server_activate()
2881
820
2882
# Find out what port we got
821
service.port = tcp_server.socket.getsockname()[1]
822
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
823
u" scope_id %d" % tcp_server.socket.getsockname())
2883
if zeroconf:
2884
service.port = tcp_server.socket.getsockname()[1]
2885
if use_ipv6:
2886
logger.info("Now listening on address %r, port %d,"
2887
" flowinfo %d, scope_id %d",
2888
*tcp_server.socket.getsockname())
2889
else: # IPv4
2890
logger.info("Now listening on address %r, port %d",
2891
*tcp_server.socket.getsockname())
824
2892
825
2893
#service.interface = tcp_server.socket.getsockname()[3]
826
2894
827
2895
try:
828
# From the Avahi example code
829
server.connect_to_signal("StateChanged", server_state_changed)
830
try:
831
server_state_changed(server.GetState())
832
except dbus.exceptions.DBusException, error:
833
logger.critical(u"DBusException: %s", error)
834
sys.exit(1)
835
# End of Avahi example code
2896
if zeroconf:
2897
# From the Avahi example code
2898
try:
2899
service.activate()
2900
except dbus.exceptions.DBusException as error:
2901
logger.critical("D-Bus Exception", exc_info=error)
2902
cleanup()
2903
sys.exit(1)
2904
# End of Avahi example code
836
2905
837
2906
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
838
2907
lambda *args, **kwargs:
839
tcp_server.handle_request\
840
(*args[2:], **kwargs) or True)
2908
(tcp_server.handle_request
2909
(*args[2:], **kwargs) or True))
841
2910
842
logger.debug(u"Starting main loop")
843
main_loop_started = True
2911
logger.debug("Starting main loop")
844
2912
main_loop.run()
845
except AvahiError, error:
846
logger.critical(u"AvahiError: %s" + unicode(error))
2913
except AvahiError as error:
2914
logger.critical("Avahi Error", exc_info=error)
2915
cleanup()
847
2916
sys.exit(1)
848
2917
except KeyboardInterrupt:
849
2918
if debug:
850
print
2919
print("", file=sys.stderr)
2920
logger.debug("Server received KeyboardInterrupt")
2921
logger.debug("Server exiting")
2922
# Must run before the D-Bus bus name gets deregistered
2923
cleanup()
2924
851
2925
852
2926
if __name__ == '__main__':
853
2927
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0