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- Committer: Björn Påhlsson
- Date: 2008-08-04 15:50:19 UTC
- mto: (24.1.154 mandos) (237.4.3 mandos-release)
- mto: This revision was merged to the branch mainline in revision 42.
- Revision ID: belorn@braxen-20080804155019-uze55fh654j1f0ow
mandosclient
changed to argp
changed to argp
- files added:
- ca.pem
- files removed:
- .bzr-builddeb
- debian
- debian/po
- debian/source
- debian/upstream
- network-hooks.d
- files renamed:
- plugin-runner.c => plugbasedclient.c
- plugins.d/mandos-client.c => plugins.d/mandosclient.c
- plugins.d/password-prompt.c => plugins.d/passprompt.c
- mandos.conf => server.conf
- mandos => server.py
- files modified:
- Makefile
added
removed
server.py
1
#!/usr/bin/python2.7
1
#!/usr/bin/python
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", "remove", "server_state_changed",
10
# "entry_group_state_changed", "cleanup", and "activate" in the
11
# "AvahiService" class, and some lines in "main".
9
# following functions: "AvahiService.add", "AvahiService.remove",
10
# "server_state_changed", "entry_group_state_changed", and some lines
11
# in "main".
12
12
#
13
13
# Everything else is
14
# Copyright © 2008-2015 Teddy Hogeborn
15
# Copyright © 2008-2015 Björn Påhlsson
14
# Copyright © 2007-2008 Teddy Hogeborn & Björn Påhlsson
16
15
#
17
16
# This program is free software: you can redistribute it and/or modify
18
17
# it under the terms of the GNU General Public License as published by
25
24
# GNU General Public License for more details.
26
25
#
27
26
# You should have received a copy of the GNU General Public License
28
# along with this program. If not, see
29
# <http://www.gnu.org/licenses/>.
30
#
31
# Contact the authors at <mandos@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
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
43
35
import socket
44
import argparse
36
import select
37
from optparse import OptionParser
45
38
import datetime
46
39
import errno
47
40
import gnutls.crypto
50
43
import gnutls.library.functions
51
44
import gnutls.library.constants
52
45
import gnutls.library.types
53
try:
54
import ConfigParser as configparser
55
except ImportError:
56
import configparser
46
import ConfigParser
57
47
import sys
58
48
import re
59
49
import os
60
50
import signal
51
from sets import Set
61
52
import subprocess
62
53
import atexit
63
54
import stat
64
55
import logging
65
56
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
81
import codecs
82
57
83
58
import dbus
84
import dbus.service
85
try:
86
import gobject
87
except ImportError:
88
from gi.repository import GObject as gobject
59
import gobject
89
60
import avahi
90
61
from dbus.mainloop.glib import DBusGMainLoop
91
62
import ctypes
92
import ctypes.util
93
import xml.dom.minidom
94
import inspect
95
96
try:
97
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
98
except AttributeError:
99
try:
100
from IN import SO_BINDTODEVICE
101
except ImportError:
102
SO_BINDTODEVICE = None
103
104
if sys.version_info.major == 2:
105
str = unicode
106
107
version = "1.6.9"
108
stored_state_file = "clients.pickle"
109
110
logger = logging.getLogger()
111
syslogger = None
112
113
try:
114
if_nametoindex = ctypes.cdll.LoadLibrary(
115
ctypes.util.find_library("c")).if_nametoindex
116
except (OSError, AttributeError):
117
118
def if_nametoindex(interface):
119
"Get an interface index the hard way, i.e. using fcntl()"
120
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
121
with contextlib.closing(socket.socket()) as s:
122
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
123
struct.pack(b"16s16x", interface))
124
interface_index = struct.unpack("I", ifreq[16:20])[0]
125
return interface_index
126
127
128
def initlogger(debug, level=logging.WARNING):
129
"""init logger and add loglevel"""
130
131
global syslogger
132
syslogger = (logging.handlers.SysLogHandler(
133
facility = logging.handlers.SysLogHandler.LOG_DAEMON,
134
address = "/dev/log"))
135
syslogger.setFormatter(logging.Formatter
136
('Mandos [%(process)d]: %(levelname)s:'
137
' %(message)s'))
138
logger.addHandler(syslogger)
139
140
if debug:
141
console = logging.StreamHandler()
142
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
143
' [%(process)d]:'
144
' %(levelname)s:'
145
' %(message)s'))
146
logger.addHandler(console)
147
logger.setLevel(level)
148
149
150
class PGPError(Exception):
151
"""Exception if encryption/decryption fails"""
152
pass
153
154
155
class PGPEngine(object):
156
"""A simple class for OpenPGP symmetric encryption & decryption"""
157
158
def __init__(self):
159
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
160
self.gnupgargs = ['--batch',
161
'--home', self.tempdir,
162
'--force-mdc',
163
'--quiet',
164
'--no-use-agent']
165
166
def __enter__(self):
167
return self
168
169
def __exit__(self, exc_type, exc_value, traceback):
170
self._cleanup()
171
return False
172
173
def __del__(self):
174
self._cleanup()
175
176
def _cleanup(self):
177
if self.tempdir is not None:
178
# Delete contents of tempdir
179
for root, dirs, files in os.walk(self.tempdir,
180
topdown = False):
181
for filename in files:
182
os.remove(os.path.join(root, filename))
183
for dirname in dirs:
184
os.rmdir(os.path.join(root, dirname))
185
# Remove tempdir
186
os.rmdir(self.tempdir)
187
self.tempdir = None
188
189
def password_encode(self, password):
190
# Passphrase can not be empty and can not contain newlines or
191
# NUL bytes. So we prefix it and hex encode it.
192
encoded = b"mandos" + binascii.hexlify(password)
193
if len(encoded) > 2048:
194
# GnuPG can't handle long passwords, so encode differently
195
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
196
.replace(b"\n", b"\\n")
197
.replace(b"\0", b"\\x00"))
198
return encoded
199
200
def encrypt(self, data, password):
201
passphrase = self.password_encode(password)
202
with tempfile.NamedTemporaryFile(
203
dir=self.tempdir) as passfile:
204
passfile.write(passphrase)
205
passfile.flush()
206
proc = subprocess.Popen(['gpg', '--symmetric',
207
'--passphrase-file',
208
passfile.name]
209
+ self.gnupgargs,
210
stdin = subprocess.PIPE,
211
stdout = subprocess.PIPE,
212
stderr = subprocess.PIPE)
213
ciphertext, err = proc.communicate(input = data)
214
if proc.returncode != 0:
215
raise PGPError(err)
216
return ciphertext
217
218
def decrypt(self, data, password):
219
passphrase = self.password_encode(password)
220
with tempfile.NamedTemporaryFile(
221
dir = self.tempdir) as passfile:
222
passfile.write(passphrase)
223
passfile.flush()
224
proc = subprocess.Popen(['gpg', '--decrypt',
225
'--passphrase-file',
226
passfile.name]
227
+ self.gnupgargs,
228
stdin = subprocess.PIPE,
229
stdout = subprocess.PIPE,
230
stderr = subprocess.PIPE)
231
decrypted_plaintext, err = proc.communicate(input = data)
232
if proc.returncode != 0:
233
raise PGPError(err)
234
return decrypted_plaintext
63
64
# Brief description of the operation of this program:
65
#
66
# This server announces itself as a Zeroconf service. Connecting
67
# clients use the TLS protocol, with the unusual quirk that this
68
# server program acts as a TLS "client" while a connecting client acts
69
# as a TLS "server". The client (acting as a TLS "server") must
70
# supply an OpenPGP certificate, and the fingerprint of this
71
# certificate is used by this server to look up (in a list read from a
72
# file at start time) which binary blob to give the client. No other
73
# authentication or authorization is done by this server.
74
75
76
logger = logging.Logger('mandos')
77
syslogger = logging.handlers.SysLogHandler\
78
(facility = logging.handlers.SysLogHandler.LOG_DAEMON)
79
syslogger.setFormatter(logging.Formatter\
80
('%(levelname)s: %(message)s'))
81
logger.addHandler(syslogger)
82
del syslogger
235
83
236
84
237
85
class AvahiError(Exception):
238
def __init__(self, value, *args, **kwargs):
86
def __init__(self, value):
239
87
self.value = value
240
return super(AvahiError, self).__init__(value, *args,
241
**kwargs)
242
88
def __str__(self):
89
return repr(self.value)
243
90
244
91
class AvahiServiceError(AvahiError):
245
92
pass
246
93
247
248
94
class AvahiGroupError(AvahiError):
249
95
pass
250
96
251
97
252
98
class AvahiService(object):
253
"""An Avahi (Zeroconf) service.
254
255
Attributes:
99
"""
256
100
interface: integer; avahi.IF_UNSPEC or an interface index.
257
101
Used to optionally bind to the specified interface.
258
name: string; Example: 'Mandos'
259
type: string; Example: '_mandos._tcp'.
260
See <https://www.iana.org/assignments/service-names-port-numbers>
261
port: integer; what port to announce
262
TXT: list of strings; TXT record for the service
263
domain: string; Domain to publish on, default to .local if empty.
264
host: string; Host to publish records for, default is localhost
265
max_renames: integer; maximum number of renames
266
rename_count: integer; counter so we only rename after collisions
267
a sensible number of times
268
group: D-Bus Entry Group
269
server: D-Bus Server
270
bus: dbus.SystemBus()
102
name = string; Example: "Mandos"
103
type = string; Example: "_mandos._tcp".
104
See <http://www.dns-sd.org/ServiceTypes.html>
105
port = integer; what port to announce
106
TXT = list of strings; TXT record for the service
107
domain = string; Domain to publish on, default to .local if empty.
108
host = string; Host to publish records for, default to localhost
109
if empty.
110
max_renames = integer; maximum number of renames
111
rename_count = integer; counter so we only rename after collisions
112
a sensible number of times
271
113
"""
272
273
def __init__(self,
274
interface = avahi.IF_UNSPEC,
275
name = None,
276
servicetype = None,
277
port = None,
278
TXT = None,
279
domain = "",
280
host = "",
281
max_renames = 32768,
282
protocol = avahi.PROTO_UNSPEC,
283
bus = None):
114
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
115
type = None, port = None, TXT = None, domain = "",
116
host = "", max_renames = 12):
117
"""An Avahi (Zeroconf) service. """
284
118
self.interface = interface
285
119
self.name = name
286
self.type = servicetype
120
self.type = type
287
121
self.port = port
288
self.TXT = TXT if TXT is not None else []
122
if TXT is None:
123
self.TXT = []
124
else:
125
self.TXT = TXT
289
126
self.domain = domain
290
127
self.host = host
291
128
self.rename_count = 0
292
self.max_renames = max_renames
293
self.protocol = protocol
294
self.group = None # our entry group
295
self.server = None
296
self.bus = bus
297
self.entry_group_state_changed_match = None
298
299
def rename(self, remove=True):
129
def rename(self):
300
130
"""Derived from the Avahi example code"""
301
131
if self.rename_count >= self.max_renames:
302
logger.critical("No suitable Zeroconf service name found"
303
" after %i retries, exiting.",
304
self.rename_count)
132
logger.critical(u"No suitable service name found after %i"
133
u" retries, exiting.", rename_count)
305
134
raise AvahiServiceError("Too many renames")
306
self.name = str(
307
self.server.GetAlternativeServiceName(self.name))
135
name = server.GetAlternativeServiceName(name)
136
logger.notice(u"Changing name to %r ...", name)
137
self.remove()
138
self.add()
308
139
self.rename_count += 1
309
logger.info("Changing Zeroconf service name to %r ...",
310
self.name)
311
if remove:
312
self.remove()
313
try:
314
self.add()
315
except dbus.exceptions.DBusException as error:
316
if (error.get_dbus_name()
317
== "org.freedesktop.Avahi.CollisionError"):
318
logger.info("Local Zeroconf service name collision.")
319
return self.rename(remove=False)
320
else:
321
logger.critical("D-Bus Exception", exc_info=error)
322
self.cleanup()
323
os._exit(1)
324
325
140
def remove(self):
326
141
"""Derived from the Avahi example code"""
327
if self.entry_group_state_changed_match is not None:
328
self.entry_group_state_changed_match.remove()
329
self.entry_group_state_changed_match = None
330
if self.group is not None:
331
self.group.Reset()
332
142
if group is not None:
143
group.Reset()
333
144
def add(self):
334
145
"""Derived from the Avahi example code"""
335
self.remove()
336
if self.group is None:
337
self.group = dbus.Interface(
338
self.bus.get_object(avahi.DBUS_NAME,
339
self.server.EntryGroupNew()),
340
avahi.DBUS_INTERFACE_ENTRY_GROUP)
341
self.entry_group_state_changed_match = (
342
self.group.connect_to_signal(
343
'StateChanged', self.entry_group_state_changed))
344
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
345
self.name, self.type)
346
self.group.AddService(
347
self.interface,
348
self.protocol,
349
dbus.UInt32(0), # flags
350
self.name, self.type,
351
self.domain, self.host,
352
dbus.UInt16(self.port),
353
avahi.string_array_to_txt_array(self.TXT))
354
self.group.Commit()
355
356
def entry_group_state_changed(self, state, error):
357
"""Derived from the Avahi example code"""
358
logger.debug("Avahi entry group state change: %i", state)
359
360
if state == avahi.ENTRY_GROUP_ESTABLISHED:
361
logger.debug("Zeroconf service established.")
362
elif state == avahi.ENTRY_GROUP_COLLISION:
363
logger.info("Zeroconf service name collision.")
364
self.rename()
365
elif state == avahi.ENTRY_GROUP_FAILURE:
366
logger.critical("Avahi: Error in group state changed %s",
367
str(error))
368
raise AvahiGroupError("State changed: {!s}".format(error))
369
370
def cleanup(self):
371
"""Derived from the Avahi example code"""
372
if self.group is not None:
373
try:
374
self.group.Free()
375
except (dbus.exceptions.UnknownMethodException,
376
dbus.exceptions.DBusException):
377
pass
378
self.group = None
379
self.remove()
380
381
def server_state_changed(self, state, error=None):
382
"""Derived from the Avahi example code"""
383
logger.debug("Avahi server state change: %i", state)
384
bad_states = {
385
avahi.SERVER_INVALID: "Zeroconf server invalid",
386
avahi.SERVER_REGISTERING: None,
387
avahi.SERVER_COLLISION: "Zeroconf server name collision",
388
avahi.SERVER_FAILURE: "Zeroconf server failure",
389
}
390
if state in bad_states:
391
if bad_states[state] is not None:
392
if error is None:
393
logger.error(bad_states[state])
394
else:
395
logger.error(bad_states[state] + ": %r", error)
396
self.cleanup()
397
elif state == avahi.SERVER_RUNNING:
398
self.add()
399
else:
400
if error is None:
401
logger.debug("Unknown state: %r", state)
402
else:
403
logger.debug("Unknown state: %r: %r", state, error)
404
405
def activate(self):
406
"""Derived from the Avahi example code"""
407
if self.server is None:
408
self.server = dbus.Interface(
409
self.bus.get_object(avahi.DBUS_NAME,
410
avahi.DBUS_PATH_SERVER,
411
follow_name_owner_changes=True),
412
avahi.DBUS_INTERFACE_SERVER)
413
self.server.connect_to_signal("StateChanged",
414
self.server_state_changed)
415
self.server_state_changed(self.server.GetState())
416
417
418
class AvahiServiceToSyslog(AvahiService):
419
def rename(self, *args, **kwargs):
420
"""Add the new name to the syslog messages"""
421
ret = AvahiService.rename(self, *args, **kwargs)
422
syslogger.setFormatter(logging.Formatter(
423
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
424
.format(self.name)))
425
return ret
146
global group
147
if group is None:
148
group = dbus.Interface\
149
(bus.get_object(avahi.DBUS_NAME,
150
server.EntryGroupNew()),
151
avahi.DBUS_INTERFACE_ENTRY_GROUP)
152
group.connect_to_signal('StateChanged',
153
entry_group_state_changed)
154
logger.debug(u"Adding service '%s' of type '%s' ...",
155
service.name, service.type)
156
group.AddService(
157
self.interface, # interface
158
avahi.PROTO_INET6, # protocol
159
dbus.UInt32(0), # flags
160
self.name, self.type,
161
self.domain, self.host,
162
dbus.UInt16(self.port),
163
avahi.string_array_to_txt_array(self.TXT))
164
group.Commit()
165
166
# From the Avahi example code:
167
group = None # our entry group
168
# End of Avahi example code
426
169
427
170
428
171
class Client(object):
429
172
"""A representation of a client host served by this server.
430
431
173
Attributes:
432
approved: bool(); 'None' if not yet approved/disapproved
433
approval_delay: datetime.timedelta(); Time to wait for approval
434
approval_duration: datetime.timedelta(); Duration of one approval
435
checker: subprocess.Popen(); a running checker process used
436
to see if the client lives.
437
'None' if no process is running.
438
checker_callback_tag: a gobject event source tag, or None
439
checker_command: string; External command which is run to check
440
if client lives. %() expansions are done at
174
name: string; from the config file, used in log messages
175
fingerprint: string (40 or 32 hexadecimal digits); used to
176
uniquely identify the client
177
secret: bytestring; sent verbatim (over TLS) to client
178
fqdn: string (FQDN); available for use by the checker command
179
created: datetime.datetime(); object creation, not client host
180
last_checked_ok: datetime.datetime() or None if not yet checked OK
181
timeout: datetime.timedelta(); How long from last_checked_ok
182
until this client is invalid
183
interval: datetime.timedelta(); How often to start a new checker
184
stop_hook: If set, called by stop() as stop_hook(self)
185
checker: subprocess.Popen(); a running checker process used
186
to see if the client lives.
187
'None' if no process is running.
188
checker_initiator_tag: a gobject event source tag, or None
189
stop_initiator_tag: - '' -
190
checker_callback_tag: - '' -
191
checker_command: string; External command which is run to check if
192
client lives. %() expansions are done at
441
193
runtime with vars(self) as dict, so that for
442
194
instance %(name)s can be used in the command.
443
checker_initiator_tag: a gobject event source tag, or None
444
created: datetime.datetime(); (UTC) object creation
445
client_structure: Object describing what attributes a client has
446
and is used for storing the client at exit
447
current_checker_command: string; current running checker_command
448
disable_initiator_tag: a gobject event source tag, or None
449
enabled: bool()
450
fingerprint: string (40 or 32 hexadecimal digits); used to
451
uniquely identify the client
452
host: string; available for use by the checker command
453
interval: datetime.timedelta(); How often to start a new checker
454
last_approval_request: datetime.datetime(); (UTC) or None
455
last_checked_ok: datetime.datetime(); (UTC) or None
456
last_checker_status: integer between 0 and 255 reflecting exit
457
status of last checker. -1 reflects crashed
458
checker, -2 means no checker completed yet.
459
last_enabled: datetime.datetime(); (UTC) or None
460
name: string; from the config file, used in log messages and
461
D-Bus identifiers
462
secret: bytestring; sent verbatim (over TLS) to client
463
timeout: datetime.timedelta(); How long from last_checked_ok
464
until this client is disabled
465
extended_timeout: extra long timeout when secret has been sent
466
runtime_expansions: Allowed attributes for runtime expansion.
467
expires: datetime.datetime(); time (UTC) when a client will be
468
disabled, or None
469
server_settings: The server_settings dict from main()
195
Private attibutes:
196
_timeout: Real variable for 'timeout'
197
_interval: Real variable for 'interval'
198
_timeout_milliseconds: Used when calling gobject.timeout_add()
199
_interval_milliseconds: - '' -
470
200
"""
471
472
runtime_expansions = ("approval_delay", "approval_duration",
473
"created", "enabled", "expires",
474
"fingerprint", "host", "interval",
475
"last_approval_request", "last_checked_ok",
476
"last_enabled", "name", "timeout")
477
client_defaults = {
478
"timeout": "PT5M",
479
"extended_timeout": "PT15M",
480
"interval": "PT2M",
481
"checker": "fping -q -- %%(host)s",
482
"host": "",
483
"approval_delay": "PT0S",
484
"approval_duration": "PT1S",
485
"approved_by_default": "True",
486
"enabled": "True",
487
}
488
489
@staticmethod
490
def config_parser(config):
491
"""Construct a new dict of client settings of this form:
492
{ client_name: {setting_name: value, ...}, ...}
493
with exceptions for any special settings as defined above.
494
NOTE: Must be a pure function. Must return the same result
495
value given the same arguments.
496
"""
497
settings = {}
498
for client_name in config.sections():
499
section = dict(config.items(client_name))
500
client = settings[client_name] = {}
501
502
client["host"] = section["host"]
503
# Reformat values from string types to Python types
504
client["approved_by_default"] = config.getboolean(
505
client_name, "approved_by_default")
506
client["enabled"] = config.getboolean(client_name,
507
"enabled")
508
509
# Uppercase and remove spaces from fingerprint for later
510
# comparison purposes with return value from the
511
# fingerprint() function
512
client["fingerprint"] = (section["fingerprint"].upper()
513
.replace(" ", ""))
514
if "secret" in section:
515
client["secret"] = section["secret"].decode("base64")
516
elif "secfile" in section:
517
with open(os.path.expanduser(os.path.expandvars
518
(section["secfile"])),
519
"rb") as secfile:
520
client["secret"] = secfile.read()
521
else:
522
raise TypeError("No secret or secfile for section {}"
523
.format(section))
524
client["timeout"] = string_to_delta(section["timeout"])
525
client["extended_timeout"] = string_to_delta(
526
section["extended_timeout"])
527
client["interval"] = string_to_delta(section["interval"])
528
client["approval_delay"] = string_to_delta(
529
section["approval_delay"])
530
client["approval_duration"] = string_to_delta(
531
section["approval_duration"])
532
client["checker_command"] = section["checker"]
533
client["last_approval_request"] = None
534
client["last_checked_ok"] = None
535
client["last_checker_status"] = -2
536
537
return settings
538
539
def __init__(self, settings, name = None, server_settings=None):
201
def _set_timeout(self, timeout):
202
"Setter function for 'timeout' attribute"
203
self._timeout = timeout
204
self._timeout_milliseconds = ((self.timeout.days
205
* 24 * 60 * 60 * 1000)
206
+ (self.timeout.seconds * 1000)
207
+ (self.timeout.microseconds
208
// 1000))
209
timeout = property(lambda self: self._timeout,
210
_set_timeout)
211
del _set_timeout
212
def _set_interval(self, interval):
213
"Setter function for 'interval' attribute"
214
self._interval = interval
215
self._interval_milliseconds = ((self.interval.days
216
* 24 * 60 * 60 * 1000)
217
+ (self.interval.seconds
218
* 1000)
219
+ (self.interval.microseconds
220
// 1000))
221
interval = property(lambda self: self._interval,
222
_set_interval)
223
del _set_interval
224
def __init__(self, name=None, stop_hook=None, fingerprint=None,
225
secret=None, secfile=None, fqdn=None, timeout=None,
226
interval=-1, checker=None):
227
"""Note: the 'checker' argument sets the 'checker_command'
228
attribute and not the 'checker' attribute.."""
540
229
self.name = name
541
if server_settings is None:
542
server_settings = {}
543
self.server_settings = server_settings
544
# adding all client settings
545
for setting, value in settings.items():
546
setattr(self, setting, value)
547
548
if self.enabled:
549
if not hasattr(self, "last_enabled"):
550
self.last_enabled = datetime.datetime.utcnow()
551
if not hasattr(self, "expires"):
552
self.expires = (datetime.datetime.utcnow()
553
+ self.timeout)
230
logger.debug(u"Creating client %r", self.name)
231
# Uppercase and remove spaces from fingerprint
232
# for later comparison purposes with return value of
233
# the fingerprint() function
234
self.fingerprint = fingerprint.upper().replace(u" ", u"")
235
logger.debug(u" Fingerprint: %s", self.fingerprint)
236
if secret:
237
self.secret = secret.decode(u"base64")
238
elif secfile:
239
sf = open(secfile)
240
self.secret = sf.read()
241
sf.close()
554
242
else:
555
self.last_enabled = None
556
self.expires = None
557
558
logger.debug("Creating client %r", self.name)
559
logger.debug(" Fingerprint: %s", self.fingerprint)
560
self.created = settings.get("created",
561
datetime.datetime.utcnow())
562
563
# attributes specific for this server instance
243
raise TypeError(u"No secret or secfile for client %s"
244
% self.name)
245
self.fqdn = fqdn
246
self.created = datetime.datetime.now()
247
self.last_checked_ok = None
248
self.timeout = string_to_delta(timeout)
249
self.interval = string_to_delta(interval)
250
self.stop_hook = stop_hook
564
251
self.checker = None
565
252
self.checker_initiator_tag = None
566
self.disable_initiator_tag = None
253
self.stop_initiator_tag = None
567
254
self.checker_callback_tag = None
568
self.current_checker_command = None
569
self.approved = None
570
self.approvals_pending = 0
571
self.changedstate = multiprocessing_manager.Condition(
572
multiprocessing_manager.Lock())
573
self.client_structure = [attr
574
for attr in self.__dict__.iterkeys()
575
if not attr.startswith("_")]
576
self.client_structure.append("client_structure")
577
578
for name, t in inspect.getmembers(
579
type(self), lambda obj: isinstance(obj, property)):
580
if not name.startswith("_"):
581
self.client_structure.append(name)
582
583
# Send notice to process children that client state has changed
584
def send_changedstate(self):
585
with self.changedstate:
586
self.changedstate.notify_all()
587
588
def enable(self):
255
self.check_command = checker
256
def start(self):
589
257
"""Start this client's checker and timeout hooks"""
590
if getattr(self, "enabled", False):
591
# Already enabled
592
return
593
self.expires = datetime.datetime.utcnow() + self.timeout
594
self.enabled = True
595
self.last_enabled = datetime.datetime.utcnow()
596
self.init_checker()
597
self.send_changedstate()
598
599
def disable(self, quiet=True):
600
"""Disable this client."""
601
if not getattr(self, "enabled", False):
602
return False
603
if not quiet:
604
logger.info("Disabling client %s", self.name)
605
if getattr(self, "disable_initiator_tag", None) is not None:
606
gobject.source_remove(self.disable_initiator_tag)
607
self.disable_initiator_tag = None
608
self.expires = None
609
if getattr(self, "checker_initiator_tag", None) is not None:
610
gobject.source_remove(self.checker_initiator_tag)
611
self.checker_initiator_tag = None
612
self.stop_checker()
613
self.enabled = False
614
if not quiet:
615
self.send_changedstate()
616
# Do not run this again if called by a gobject.timeout_add
617
return False
618
619
def __del__(self):
620
self.disable()
621
622
def init_checker(self):
623
258
# Schedule a new checker to be started an 'interval' from now,
624
259
# and every interval from then on.
625
if self.checker_initiator_tag is not None:
626
gobject.source_remove(self.checker_initiator_tag)
627
self.checker_initiator_tag = gobject.timeout_add(
628
int(self.interval.total_seconds() * 1000),
629
self.start_checker)
630
# Schedule a disable() when 'timeout' has passed
631
if self.disable_initiator_tag is not None:
632
gobject.source_remove(self.disable_initiator_tag)
633
self.disable_initiator_tag = gobject.timeout_add(
634
int(self.timeout.total_seconds() * 1000), self.disable)
260
self.checker_initiator_tag = gobject.timeout_add\
261
(self._interval_milliseconds,
262
self.start_checker)
635
263
# Also start a new checker *right now*.
636
264
self.start_checker()
637
638
def checker_callback(self, pid, condition, command):
265
# Schedule a stop() when 'timeout' has passed
266
self.stop_initiator_tag = gobject.timeout_add\
267
(self._timeout_milliseconds,
268
self.stop)
269
def stop(self):
270
"""Stop this client.
271
The possibility that a client might be restarted is left open,
272
but not currently used."""
273
# If this client doesn't have a secret, it is already stopped.
274
if self.secret:
275
logger.debug(u"Stopping client %s", self.name)
276
self.secret = None
277
else:
278
return False
279
if getattr(self, "stop_initiator_tag", False):
280
gobject.source_remove(self.stop_initiator_tag)
281
self.stop_initiator_tag = None
282
if getattr(self, "checker_initiator_tag", False):
283
gobject.source_remove(self.checker_initiator_tag)
284
self.checker_initiator_tag = None
285
self.stop_checker()
286
if self.stop_hook:
287
self.stop_hook(self)
288
# Do not run this again if called by a gobject.timeout_add
289
return False
290
def __del__(self):
291
self.stop_hook = None
292
self.stop()
293
def checker_callback(self, pid, condition):
639
294
"""The checker has completed, so take appropriate actions."""
295
now = datetime.datetime.now()
640
296
self.checker_callback_tag = None
641
297
self.checker = None
642
if os.WIFEXITED(condition):
643
self.last_checker_status = os.WEXITSTATUS(condition)
644
if self.last_checker_status == 0:
645
logger.info("Checker for %(name)s succeeded",
646
vars(self))
647
self.checked_ok()
648
else:
649
logger.info("Checker for %(name)s failed", vars(self))
650
else:
651
self.last_checker_status = -1
652
logger.warning("Checker for %(name)s crashed?",
298
if os.WIFEXITED(condition) \
299
and (os.WEXITSTATUS(condition) == 0):
300
logger.debug(u"Checker for %(name)s succeeded",
301
vars(self))
302
self.last_checked_ok = now
303
gobject.source_remove(self.stop_initiator_tag)
304
self.stop_initiator_tag = gobject.timeout_add\
305
(self._timeout_milliseconds,
306
self.stop)
307
elif not os.WIFEXITED(condition):
308
logger.warning(u"Checker for %(name)s crashed?",
653
309
vars(self))
654
655
def checked_ok(self):
656
"""Assert that the client has been seen, alive and well."""
657
self.last_checked_ok = datetime.datetime.utcnow()
658
self.last_checker_status = 0
659
self.bump_timeout()
660
661
def bump_timeout(self, timeout=None):
662
"""Bump up the timeout for this client."""
663
if timeout is None:
664
timeout = self.timeout
665
if self.disable_initiator_tag is not None:
666
gobject.source_remove(self.disable_initiator_tag)
667
self.disable_initiator_tag = None
668
if getattr(self, "enabled", False):
669
self.disable_initiator_tag = gobject.timeout_add(
670
int(timeout.total_seconds() * 1000), self.disable)
671
self.expires = datetime.datetime.utcnow() + timeout
672
673
def need_approval(self):
674
self.last_approval_request = datetime.datetime.utcnow()
675
310
else:
311
logger.debug(u"Checker for %(name)s failed",
312
vars(self))
676
313
def start_checker(self):
677
314
"""Start a new checker subprocess if one is not running.
678
679
315
If a checker already exists, leave it running and do
680
316
nothing."""
681
317
# The reason for not killing a running checker is that if we
682
# did that, and if a checker (for some reason) started running
683
# slowly and taking more than 'interval' time, then the client
684
# would inevitably timeout, since no checker would get a
685
# chance to run to completion. If we instead leave running
318
# did that, then if a checker (for some reason) started
319
# running slowly and taking more than 'interval' time, the
320
# client would inevitably timeout, since no checker would get
321
# a chance to run to completion. If we instead leave running
686
322
# checkers alone, the checker would have to take more time
687
# than 'timeout' for the client to be disabled, which is as it
688
# should be.
689
690
# If a checker exists, make sure it is not a zombie
691
try:
692
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
693
except AttributeError:
694
pass
695
except OSError as error:
696
if error.errno != errno.ECHILD:
697
raise
698
else:
699
if pid:
700
logger.warning("Checker was a zombie")
701
gobject.source_remove(self.checker_callback_tag)
702
self.checker_callback(pid, status,
703
self.current_checker_command)
704
# Start a new checker if needed
323
# than 'timeout' for the client to be declared invalid, which
324
# is as it should be.
705
325
if self.checker is None:
706
# Escape attributes for the shell
707
escaped_attrs = {
708
attr: re.escape(str(getattr(self, attr)))
709
for attr in self.runtime_expansions }
710
try:
711
command = self.checker_command % escaped_attrs
712
except TypeError as error:
713
logger.error('Could not format string "%s"',
714
self.checker_command,
715
exc_info=error)
716
return True # Try again later
717
self.current_checker_command = command
718
try:
719
logger.info("Starting checker %r for %s", command,
720
self.name)
721
# We don't need to redirect stdout and stderr, since
722
# in normal mode, that is already done by daemon(),
723
# and in debug mode we don't want to. (Stdin is
724
# always replaced by /dev/null.)
725
# The exception is when not debugging but nevertheless
726
# running in the foreground; use the previously
727
# created wnull.
728
popen_args = {}
729
if (not self.server_settings["debug"]
730
and self.server_settings["foreground"]):
731
popen_args.update({"stdout": wnull,
732
"stderr": wnull })
326
try:
327
# In case check_command has exactly one % operator
328
command = self.check_command % self.fqdn
329
except TypeError:
330
# Escape attributes for the shell
331
escaped_attrs = dict((key, re.escape(str(val)))
332
for key, val in
333
vars(self).iteritems())
334
try:
335
command = self.check_command % escaped_attrs
336
except TypeError, error:
337
logger.error(u'Could not format string "%s":'
338
u' %s', self.check_command, error)
339
return True # Try again later
340
try:
341
logger.debug(u"Starting checker %r for %s",
342
command, self.name)
733
343
self.checker = subprocess.Popen(command,
734
344
close_fds=True,
735
shell=True,
736
cwd="/",
737
**popen_args)
738
except OSError as error:
739
logger.error("Failed to start subprocess",
740
exc_info=error)
741
return True
742
self.checker_callback_tag = gobject.child_watch_add(
743
self.checker.pid, self.checker_callback, data=command)
744
# The checker may have completed before the gobject
745
# watch was added. Check for this.
746
try:
747
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
748
except OSError as error:
749
if error.errno == errno.ECHILD:
750
# This should never happen
751
logger.error("Child process vanished",
752
exc_info=error)
753
return True
754
raise
755
if pid:
756
gobject.source_remove(self.checker_callback_tag)
757
self.checker_callback(pid, status, command)
345
shell=True, cwd="/")
346
self.checker_callback_tag = gobject.child_watch_add\
347
(self.checker.pid,
348
self.checker_callback)
349
except subprocess.OSError, error:
350
logger.error(u"Failed to start subprocess: %s",
351
error)
758
352
# Re-run this periodically if run by gobject.timeout_add
759
353
return True
760
761
354
def stop_checker(self):
762
355
"""Force the checker process, if any, to stop."""
763
356
if self.checker_callback_tag:
767
360
return
768
361
logger.debug("Stopping checker for %(name)s", vars(self))
769
362
try:
770
self.checker.terminate()
771
#time.sleep(0.5)
363
os.kill(self.checker.pid, signal.SIGTERM)
364
#os.sleep(0.5)
772
365
#if self.checker.poll() is None:
773
# self.checker.kill()
774
except OSError as error:
366
# os.kill(self.checker.pid, signal.SIGKILL)
367
except OSError, error:
775
368
if error.errno != errno.ESRCH: # No such process
776
369
raise
777
370
self.checker = None
778
779
780
def dbus_service_property(dbus_interface,
781
signature="v",
782
access="readwrite",
783
byte_arrays=False):
784
"""Decorators for marking methods of a DBusObjectWithProperties to
785
become properties on the D-Bus.
786
787
The decorated method will be called with no arguments by "Get"
788
and with one argument by "Set".
789
790
The parameters, where they are supported, are the same as
791
dbus.service.method, except there is only "signature", since the
792
type from Get() and the type sent to Set() is the same.
793
"""
794
# Encoding deeply encoded byte arrays is not supported yet by the
795
# "Set" method, so we fail early here:
796
if byte_arrays and signature != "ay":
797
raise ValueError("Byte arrays not supported for non-'ay'"
798
" signature {!r}".format(signature))
799
800
def decorator(func):
801
func._dbus_is_property = True
802
func._dbus_interface = dbus_interface
803
func._dbus_signature = signature
804
func._dbus_access = access
805
func._dbus_name = func.__name__
806
if func._dbus_name.endswith("_dbus_property"):
807
func._dbus_name = func._dbus_name[:-14]
808
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
809
return func
810
811
return decorator
812
813
814
def dbus_interface_annotations(dbus_interface):
815
"""Decorator for marking functions returning interface annotations
816
817
Usage:
818
819
@dbus_interface_annotations("org.example.Interface")
820
def _foo(self): # Function name does not matter
821
return {"org.freedesktop.DBus.Deprecated": "true",
822
"org.freedesktop.DBus.Property.EmitsChangedSignal":
823
"false"}
824
"""
825
826
def decorator(func):
827
func._dbus_is_interface = True
828
func._dbus_interface = dbus_interface
829
func._dbus_name = dbus_interface
830
return func
831
832
return decorator
833
834
835
def dbus_annotations(annotations):
836
"""Decorator to annotate D-Bus methods, signals or properties
837
Usage:
838
839
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
840
"org.freedesktop.DBus.Property."
841
"EmitsChangedSignal": "false"})
842
@dbus_service_property("org.example.Interface", signature="b",
843
access="r")
844
def Property_dbus_property(self):
845
return dbus.Boolean(False)
846
"""
847
848
def decorator(func):
849
func._dbus_annotations = annotations
850
return func
851
852
return decorator
853
854
855
class DBusPropertyException(dbus.exceptions.DBusException):
856
"""A base class for D-Bus property-related exceptions
857
"""
858
pass
859
860
861
class DBusPropertyAccessException(DBusPropertyException):
862
"""A property's access permissions disallows an operation.
863
"""
864
pass
865
866
867
class DBusPropertyNotFound(DBusPropertyException):
868
"""An attempt was made to access a non-existing property.
869
"""
870
pass
871
872
873
class DBusObjectWithProperties(dbus.service.Object):
874
"""A D-Bus object with properties.
875
876
Classes inheriting from this can use the dbus_service_property
877
decorator to expose methods as D-Bus properties. It exposes the
878
standard Get(), Set(), and GetAll() methods on the D-Bus.
879
"""
880
881
@staticmethod
882
def _is_dbus_thing(thing):
883
"""Returns a function testing if an attribute is a D-Bus thing
884
885
If called like _is_dbus_thing("method") it returns a function
886
suitable for use as predicate to inspect.getmembers().
887
"""
888
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
889
False)
890
891
def _get_all_dbus_things(self, thing):
892
"""Returns a generator of (name, attribute) pairs
893
"""
894
return ((getattr(athing.__get__(self), "_dbus_name", name),
895
athing.__get__(self))
896
for cls in self.__class__.__mro__
897
for name, athing in
898
inspect.getmembers(cls, self._is_dbus_thing(thing)))
899
900
def _get_dbus_property(self, interface_name, property_name):
901
"""Returns a bound method if one exists which is a D-Bus
902
property with the specified name and interface.
903
"""
904
for cls in self.__class__.__mro__:
905
for name, value in inspect.getmembers(
906
cls, self._is_dbus_thing("property")):
907
if (value._dbus_name == property_name
908
and value._dbus_interface == interface_name):
909
return value.__get__(self)
910
911
# No such property
912
raise DBusPropertyNotFound("{}:{}.{}".format(
913
self.dbus_object_path, interface_name, property_name))
914
915
@dbus.service.method(dbus.PROPERTIES_IFACE,
916
in_signature="ss",
917
out_signature="v")
918
def Get(self, interface_name, property_name):
919
"""Standard D-Bus property Get() method, see D-Bus standard.
920
"""
921
prop = self._get_dbus_property(interface_name, property_name)
922
if prop._dbus_access == "write":
923
raise DBusPropertyAccessException(property_name)
924
value = prop()
925
if not hasattr(value, "variant_level"):
926
return value
927
return type(value)(value, variant_level=value.variant_level+1)
928
929
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
930
def Set(self, interface_name, property_name, value):
931
"""Standard D-Bus property Set() method, see D-Bus standard.
932
"""
933
prop = self._get_dbus_property(interface_name, property_name)
934
if prop._dbus_access == "read":
935
raise DBusPropertyAccessException(property_name)
936
if prop._dbus_get_args_options["byte_arrays"]:
937
# The byte_arrays option is not supported yet on
938
# signatures other than "ay".
939
if prop._dbus_signature != "ay":
940
raise ValueError("Byte arrays not supported for non-"
941
"'ay' signature {!r}"
942
.format(prop._dbus_signature))
943
value = dbus.ByteArray(b''.join(chr(byte)
944
for byte in value))
945
prop(value)
946
947
@dbus.service.method(dbus.PROPERTIES_IFACE,
948
in_signature="s",
949
out_signature="a{sv}")
950
def GetAll(self, interface_name):
951
"""Standard D-Bus property GetAll() method, see D-Bus
952
standard.
953
954
Note: Will not include properties with access="write".
955
"""
956
properties = {}
957
for name, prop in self._get_all_dbus_things("property"):
958
if (interface_name
959
and interface_name != prop._dbus_interface):
960
# Interface non-empty but did not match
961
continue
962
# Ignore write-only properties
963
if prop._dbus_access == "write":
964
continue
965
value = prop()
966
if not hasattr(value, "variant_level"):
967
properties[name] = value
968
continue
969
properties[name] = type(value)(
970
value, variant_level = value.variant_level + 1)
971
return dbus.Dictionary(properties, signature="sv")
972
973
@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
974
def PropertiesChanged(self, interface_name, changed_properties,
975
invalidated_properties):
976
"""Standard D-Bus PropertiesChanged() signal, see D-Bus
977
standard.
978
"""
979
pass
980
981
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
982
out_signature="s",
983
path_keyword='object_path',
984
connection_keyword='connection')
985
def Introspect(self, object_path, connection):
986
"""Overloading of standard D-Bus method.
987
988
Inserts property tags and interface annotation tags.
989
"""
990
xmlstring = dbus.service.Object.Introspect(self, object_path,
991
connection)
992
try:
993
document = xml.dom.minidom.parseString(xmlstring)
994
995
def make_tag(document, name, prop):
996
e = document.createElement("property")
997
e.setAttribute("name", name)
998
e.setAttribute("type", prop._dbus_signature)
999
e.setAttribute("access", prop._dbus_access)
1000
return e
1001
1002
for if_tag in document.getElementsByTagName("interface"):
1003
# Add property tags
1004
for tag in (make_tag(document, name, prop)
1005
for name, prop
1006
in self._get_all_dbus_things("property")
1007
if prop._dbus_interface
1008
== if_tag.getAttribute("name")):
1009
if_tag.appendChild(tag)
1010
# Add annotation tags
1011
for typ in ("method", "signal", "property"):
1012
for tag in if_tag.getElementsByTagName(typ):
1013
annots = dict()
1014
for name, prop in (self.
1015
_get_all_dbus_things(typ)):
1016
if (name == tag.getAttribute("name")
1017
and prop._dbus_interface
1018
== if_tag.getAttribute("name")):
1019
annots.update(getattr(
1020
prop, "_dbus_annotations", {}))
1021
for name, value in annots.items():
1022
ann_tag = document.createElement(
1023
"annotation")
1024
ann_tag.setAttribute("name", name)
1025
ann_tag.setAttribute("value", value)
1026
tag.appendChild(ann_tag)
1027
# Add interface annotation tags
1028
for annotation, value in dict(
1029
itertools.chain.from_iterable(
1030
annotations().items()
1031
for name, annotations
1032
in self._get_all_dbus_things("interface")
1033
if name == if_tag.getAttribute("name")
1034
)).items():
1035
ann_tag = document.createElement("annotation")
1036
ann_tag.setAttribute("name", annotation)
1037
ann_tag.setAttribute("value", value)
1038
if_tag.appendChild(ann_tag)
1039
# Add the names to the return values for the
1040
# "org.freedesktop.DBus.Properties" methods
1041
if (if_tag.getAttribute("name")
1042
== "org.freedesktop.DBus.Properties"):
1043
for cn in if_tag.getElementsByTagName("method"):
1044
if cn.getAttribute("name") == "Get":
1045
for arg in cn.getElementsByTagName("arg"):
1046
if (arg.getAttribute("direction")
1047
== "out"):
1048
arg.setAttribute("name", "value")
1049
elif cn.getAttribute("name") == "GetAll":
1050
for arg in cn.getElementsByTagName("arg"):
1051
if (arg.getAttribute("direction")
1052
== "out"):
1053
arg.setAttribute("name", "props")
1054
xmlstring = document.toxml("utf-8")
1055
document.unlink()
1056
except (AttributeError, xml.dom.DOMException,
1057
xml.parsers.expat.ExpatError) as error:
1058
logger.error("Failed to override Introspection method",
1059
exc_info=error)
1060
return xmlstring
1061
1062
1063
def datetime_to_dbus(dt, variant_level=0):
1064
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1065
if dt is None:
1066
return dbus.String("", variant_level = variant_level)
1067
return dbus.String(dt.isoformat(), variant_level=variant_level)
1068
1069
1070
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1071
"""A class decorator; applied to a subclass of
1072
dbus.service.Object, it will add alternate D-Bus attributes with
1073
interface names according to the "alt_interface_names" mapping.
1074
Usage:
1075
1076
@alternate_dbus_interfaces({"org.example.Interface":
1077
"net.example.AlternateInterface"})
1078
class SampleDBusObject(dbus.service.Object):
1079
@dbus.service.method("org.example.Interface")
1080
def SampleDBusMethod():
1081
pass
1082
1083
The above "SampleDBusMethod" on "SampleDBusObject" will be
1084
reachable via two interfaces: "org.example.Interface" and
1085
"net.example.AlternateInterface", the latter of which will have
1086
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1087
"true", unless "deprecate" is passed with a False value.
1088
1089
This works for methods and signals, and also for D-Bus properties
1090
(from DBusObjectWithProperties) and interfaces (from the
1091
dbus_interface_annotations decorator).
1092
"""
1093
1094
def wrapper(cls):
1095
for orig_interface_name, alt_interface_name in (
1096
alt_interface_names.items()):
1097
attr = {}
1098
interface_names = set()
1099
# Go though all attributes of the class
1100
for attrname, attribute in inspect.getmembers(cls):
1101
# Ignore non-D-Bus attributes, and D-Bus attributes
1102
# with the wrong interface name
1103
if (not hasattr(attribute, "_dbus_interface")
1104
or not attribute._dbus_interface.startswith(
1105
orig_interface_name)):
1106
continue
1107
# Create an alternate D-Bus interface name based on
1108
# the current name
1109
alt_interface = attribute._dbus_interface.replace(
1110
orig_interface_name, alt_interface_name)
1111
interface_names.add(alt_interface)
1112
# Is this a D-Bus signal?
1113
if getattr(attribute, "_dbus_is_signal", False):
1114
# Extract the original non-method undecorated
1115
# function by black magic
1116
nonmethod_func = (dict(
1117
zip(attribute.func_code.co_freevars,
1118
attribute.__closure__))
1119
["func"].cell_contents)
1120
# Create a new, but exactly alike, function
1121
# object, and decorate it to be a new D-Bus signal
1122
# with the alternate D-Bus interface name
1123
new_function = (dbus.service.signal(
1124
alt_interface, attribute._dbus_signature)
1125
(types.FunctionType(
1126
nonmethod_func.func_code,
1127
nonmethod_func.func_globals,
1128
nonmethod_func.func_name,
1129
nonmethod_func.func_defaults,
1130
nonmethod_func.func_closure)))
1131
# Copy annotations, if any
1132
try:
1133
new_function._dbus_annotations = dict(
1134
attribute._dbus_annotations)
1135
except AttributeError:
1136
pass
1137
# Define a creator of a function to call both the
1138
# original and alternate functions, so both the
1139
# original and alternate signals gets sent when
1140
# the function is called
1141
def fixscope(func1, func2):
1142
"""This function is a scope container to pass
1143
func1 and func2 to the "call_both" function
1144
outside of its arguments"""
1145
1146
def call_both(*args, **kwargs):
1147
"""This function will emit two D-Bus
1148
signals by calling func1 and func2"""
1149
func1(*args, **kwargs)
1150
func2(*args, **kwargs)
1151
1152
return call_both
1153
# Create the "call_both" function and add it to
1154
# the class
1155
attr[attrname] = fixscope(attribute, new_function)
1156
# Is this a D-Bus method?
1157
elif getattr(attribute, "_dbus_is_method", False):
1158
# Create a new, but exactly alike, function
1159
# object. Decorate it to be a new D-Bus method
1160
# with the alternate D-Bus interface name. Add it
1161
# to the class.
1162
attr[attrname] = (
1163
dbus.service.method(
1164
alt_interface,
1165
attribute._dbus_in_signature,
1166
attribute._dbus_out_signature)
1167
(types.FunctionType(attribute.func_code,
1168
attribute.func_globals,
1169
attribute.func_name,
1170
attribute.func_defaults,
1171
attribute.func_closure)))
1172
# Copy annotations, if any
1173
try:
1174
attr[attrname]._dbus_annotations = dict(
1175
attribute._dbus_annotations)
1176
except AttributeError:
1177
pass
1178
# Is this a D-Bus property?
1179
elif getattr(attribute, "_dbus_is_property", False):
1180
# Create a new, but exactly alike, function
1181
# object, and decorate it to be a new D-Bus
1182
# property with the alternate D-Bus interface
1183
# name. Add it to the class.
1184
attr[attrname] = (dbus_service_property(
1185
alt_interface, attribute._dbus_signature,
1186
attribute._dbus_access,
1187
attribute._dbus_get_args_options
1188
["byte_arrays"])
1189
(types.FunctionType(
1190
attribute.func_code,
1191
attribute.func_globals,
1192
attribute.func_name,
1193
attribute.func_defaults,
1194
attribute.func_closure)))
1195
# Copy annotations, if any
1196
try:
1197
attr[attrname]._dbus_annotations = dict(
1198
attribute._dbus_annotations)
1199
except AttributeError:
1200
pass
1201
# Is this a D-Bus interface?
1202
elif getattr(attribute, "_dbus_is_interface", False):
1203
# Create a new, but exactly alike, function
1204
# object. Decorate it to be a new D-Bus interface
1205
# with the alternate D-Bus interface name. Add it
1206
# to the class.
1207
attr[attrname] = (
1208
dbus_interface_annotations(alt_interface)
1209
(types.FunctionType(attribute.func_code,
1210
attribute.func_globals,
1211
attribute.func_name,
1212
attribute.func_defaults,
1213
attribute.func_closure)))
1214
if deprecate:
1215
# Deprecate all alternate interfaces
1216
iname="_AlternateDBusNames_interface_annotation{}"
1217
for interface_name in interface_names:
1218
1219
@dbus_interface_annotations(interface_name)
1220
def func(self):
1221
return { "org.freedesktop.DBus.Deprecated":
1222
"true" }
1223
# Find an unused name
1224
for aname in (iname.format(i)
1225
for i in itertools.count()):
1226
if aname not in attr:
1227
attr[aname] = func
1228
break
1229
if interface_names:
1230
# Replace the class with a new subclass of it with
1231
# methods, signals, etc. as created above.
1232
cls = type(b"{}Alternate".format(cls.__name__),
1233
(cls, ), attr)
1234
return cls
1235
1236
return wrapper
1237
1238
1239
@alternate_dbus_interfaces({"se.recompile.Mandos":
1240
"se.bsnet.fukt.Mandos"})
1241
class ClientDBus(Client, DBusObjectWithProperties):
1242
"""A Client class using D-Bus
1243
1244
Attributes:
1245
dbus_object_path: dbus.ObjectPath
1246
bus: dbus.SystemBus()
1247
"""
1248
1249
runtime_expansions = (Client.runtime_expansions
1250
+ ("dbus_object_path", ))
1251
1252
_interface = "se.recompile.Mandos.Client"
1253
1254
# dbus.service.Object doesn't use super(), so we can't either.
1255
1256
def __init__(self, bus = None, *args, **kwargs):
1257
self.bus = bus
1258
Client.__init__(self, *args, **kwargs)
1259
# Only now, when this client is initialized, can it show up on
1260
# the D-Bus
1261
client_object_name = str(self.name).translate(
1262
{ord("."): ord("_"),
1263
ord("-"): ord("_")})
1264
self.dbus_object_path = dbus.ObjectPath(
1265
"/clients/" + client_object_name)
1266
DBusObjectWithProperties.__init__(self, self.bus,
1267
self.dbus_object_path)
1268
1269
def notifychangeproperty(transform_func, dbus_name,
1270
type_func=lambda x: x,
1271
variant_level=1,
1272
invalidate_only=False,
1273
_interface=_interface):
1274
""" Modify a variable so that it's a property which announces
1275
its changes to DBus.
1276
1277
transform_fun: Function that takes a value and a variant_level
1278
and transforms it to a D-Bus type.
1279
dbus_name: D-Bus name of the variable
1280
type_func: Function that transform the value before sending it
1281
to the D-Bus. Default: no transform
1282
variant_level: D-Bus variant level. Default: 1
1283
"""
1284
attrname = "_{}".format(dbus_name)
1285
1286
def setter(self, value):
1287
if hasattr(self, "dbus_object_path"):
1288
if (not hasattr(self, attrname) or
1289
type_func(getattr(self, attrname, None))
1290
!= type_func(value)):
1291
if invalidate_only:
1292
self.PropertiesChanged(
1293
_interface, dbus.Dictionary(),
1294
dbus.Array((dbus_name, )))
1295
else:
1296
dbus_value = transform_func(
1297
type_func(value),
1298
variant_level = variant_level)
1299
self.PropertyChanged(dbus.String(dbus_name),
1300
dbus_value)
1301
self.PropertiesChanged(
1302
_interface,
1303
dbus.Dictionary({ dbus.String(dbus_name):
1304
dbus_value }),
1305
dbus.Array())
1306
setattr(self, attrname, value)
1307
1308
return property(lambda self: getattr(self, attrname), setter)
1309
1310
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1311
approvals_pending = notifychangeproperty(dbus.Boolean,
1312
"ApprovalPending",
1313
type_func = bool)
1314
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1315
last_enabled = notifychangeproperty(datetime_to_dbus,
1316
"LastEnabled")
1317
checker = notifychangeproperty(
1318
dbus.Boolean, "CheckerRunning",
1319
type_func = lambda checker: checker is not None)
1320
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1321
"LastCheckedOK")
1322
last_checker_status = notifychangeproperty(dbus.Int16,
1323
"LastCheckerStatus")
1324
last_approval_request = notifychangeproperty(
1325
datetime_to_dbus, "LastApprovalRequest")
1326
approved_by_default = notifychangeproperty(dbus.Boolean,
1327
"ApprovedByDefault")
1328
approval_delay = notifychangeproperty(
1329
dbus.UInt64, "ApprovalDelay",
1330
type_func = lambda td: td.total_seconds() * 1000)
1331
approval_duration = notifychangeproperty(
1332
dbus.UInt64, "ApprovalDuration",
1333
type_func = lambda td: td.total_seconds() * 1000)
1334
host = notifychangeproperty(dbus.String, "Host")
1335
timeout = notifychangeproperty(
1336
dbus.UInt64, "Timeout",
1337
type_func = lambda td: td.total_seconds() * 1000)
1338
extended_timeout = notifychangeproperty(
1339
dbus.UInt64, "ExtendedTimeout",
1340
type_func = lambda td: td.total_seconds() * 1000)
1341
interval = notifychangeproperty(
1342
dbus.UInt64, "Interval",
1343
type_func = lambda td: td.total_seconds() * 1000)
1344
checker_command = notifychangeproperty(dbus.String, "Checker")
1345
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1346
invalidate_only=True)
1347
1348
del notifychangeproperty
1349
1350
def __del__(self, *args, **kwargs):
1351
try:
1352
self.remove_from_connection()
1353
except LookupError:
1354
pass
1355
if hasattr(DBusObjectWithProperties, "__del__"):
1356
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1357
Client.__del__(self, *args, **kwargs)
1358
1359
def checker_callback(self, pid, condition, command,
1360
*args, **kwargs):
1361
self.checker_callback_tag = None
1362
self.checker = None
1363
if os.WIFEXITED(condition):
1364
exitstatus = os.WEXITSTATUS(condition)
1365
# Emit D-Bus signal
1366
self.CheckerCompleted(dbus.Int16(exitstatus),
1367
dbus.Int64(condition),
1368
dbus.String(command))
1369
else:
1370
# Emit D-Bus signal
1371
self.CheckerCompleted(dbus.Int16(-1),
1372
dbus.Int64(condition),
1373
dbus.String(command))
1374
1375
return Client.checker_callback(self, pid, condition, command,
1376
*args, **kwargs)
1377
1378
def start_checker(self, *args, **kwargs):
1379
old_checker_pid = getattr(self.checker, "pid", None)
1380
r = Client.start_checker(self, *args, **kwargs)
1381
# Only if new checker process was started
1382
if (self.checker is not None
1383
and old_checker_pid != self.checker.pid):
1384
# Emit D-Bus signal
1385
self.CheckerStarted(self.current_checker_command)
1386
return r
1387
1388
def _reset_approved(self):
1389
self.approved = None
1390
return False
1391
1392
def approve(self, value=True):
1393
self.approved = value
1394
gobject.timeout_add(int(self.approval_duration.total_seconds()
1395
* 1000), self._reset_approved)
1396
self.send_changedstate()
1397
1398
## D-Bus methods, signals & properties
1399
1400
## Interfaces
1401
1402
## Signals
1403
1404
# CheckerCompleted - signal
1405
@dbus.service.signal(_interface, signature="nxs")
1406
def CheckerCompleted(self, exitcode, waitstatus, command):
1407
"D-Bus signal"
1408
pass
1409
1410
# CheckerStarted - signal
1411
@dbus.service.signal(_interface, signature="s")
1412
def CheckerStarted(self, command):
1413
"D-Bus signal"
1414
pass
1415
1416
# PropertyChanged - signal
1417
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1418
@dbus.service.signal(_interface, signature="sv")
1419
def PropertyChanged(self, property, value):
1420
"D-Bus signal"
1421
pass
1422
1423
# GotSecret - signal
1424
@dbus.service.signal(_interface)
1425
def GotSecret(self):
1426
"""D-Bus signal
1427
Is sent after a successful transfer of secret from the Mandos
1428
server to mandos-client
1429
"""
1430
pass
1431
1432
# Rejected - signal
1433
@dbus.service.signal(_interface, signature="s")
1434
def Rejected(self, reason):
1435
"D-Bus signal"
1436
pass
1437
1438
# NeedApproval - signal
1439
@dbus.service.signal(_interface, signature="tb")
1440
def NeedApproval(self, timeout, default):
1441
"D-Bus signal"
1442
return self.need_approval()
1443
1444
## Methods
1445
1446
# Approve - method
1447
@dbus.service.method(_interface, in_signature="b")
1448
def Approve(self, value):
1449
self.approve(value)
1450
1451
# CheckedOK - method
1452
@dbus.service.method(_interface)
1453
def CheckedOK(self):
1454
self.checked_ok()
1455
1456
# Enable - method
1457
@dbus.service.method(_interface)
1458
def Enable(self):
1459
"D-Bus method"
1460
self.enable()
1461
1462
# StartChecker - method
1463
@dbus.service.method(_interface)
1464
def StartChecker(self):
1465
"D-Bus method"
1466
self.start_checker()
1467
1468
# Disable - method
1469
@dbus.service.method(_interface)
1470
def Disable(self):
1471
"D-Bus method"
1472
self.disable()
1473
1474
# StopChecker - method
1475
@dbus.service.method(_interface)
1476
def StopChecker(self):
1477
self.stop_checker()
1478
1479
## Properties
1480
1481
# ApprovalPending - property
1482
@dbus_service_property(_interface, signature="b", access="read")
1483
def ApprovalPending_dbus_property(self):
1484
return dbus.Boolean(bool(self.approvals_pending))
1485
1486
# ApprovedByDefault - property
1487
@dbus_service_property(_interface,
1488
signature="b",
1489
access="readwrite")
1490
def ApprovedByDefault_dbus_property(self, value=None):
1491
if value is None: # get
1492
return dbus.Boolean(self.approved_by_default)
1493
self.approved_by_default = bool(value)
1494
1495
# ApprovalDelay - property
1496
@dbus_service_property(_interface,
1497
signature="t",
1498
access="readwrite")
1499
def ApprovalDelay_dbus_property(self, value=None):
1500
if value is None: # get
1501
return dbus.UInt64(self.approval_delay.total_seconds()
1502
* 1000)
1503
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1504
1505
# ApprovalDuration - property
1506
@dbus_service_property(_interface,
1507
signature="t",
1508
access="readwrite")
1509
def ApprovalDuration_dbus_property(self, value=None):
1510
if value is None: # get
1511
return dbus.UInt64(self.approval_duration.total_seconds()
1512
* 1000)
1513
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1514
1515
# Name - property
1516
@dbus_service_property(_interface, signature="s", access="read")
1517
def Name_dbus_property(self):
1518
return dbus.String(self.name)
1519
1520
# Fingerprint - property
1521
@dbus_service_property(_interface, signature="s", access="read")
1522
def Fingerprint_dbus_property(self):
1523
return dbus.String(self.fingerprint)
1524
1525
# Host - property
1526
@dbus_service_property(_interface,
1527
signature="s",
1528
access="readwrite")
1529
def Host_dbus_property(self, value=None):
1530
if value is None: # get
1531
return dbus.String(self.host)
1532
self.host = str(value)
1533
1534
# Created - property
1535
@dbus_service_property(_interface, signature="s", access="read")
1536
def Created_dbus_property(self):
1537
return datetime_to_dbus(self.created)
1538
1539
# LastEnabled - property
1540
@dbus_service_property(_interface, signature="s", access="read")
1541
def LastEnabled_dbus_property(self):
1542
return datetime_to_dbus(self.last_enabled)
1543
1544
# Enabled - property
1545
@dbus_service_property(_interface,
1546
signature="b",
1547
access="readwrite")
1548
def Enabled_dbus_property(self, value=None):
1549
if value is None: # get
1550
return dbus.Boolean(self.enabled)
1551
if value:
1552
self.enable()
1553
else:
1554
self.disable()
1555
1556
# LastCheckedOK - property
1557
@dbus_service_property(_interface,
1558
signature="s",
1559
access="readwrite")
1560
def LastCheckedOK_dbus_property(self, value=None):
1561
if value is not None:
1562
self.checked_ok()
1563
return
1564
return datetime_to_dbus(self.last_checked_ok)
1565
1566
# LastCheckerStatus - property
1567
@dbus_service_property(_interface, signature="n", access="read")
1568
def LastCheckerStatus_dbus_property(self):
1569
return dbus.Int16(self.last_checker_status)
1570
1571
# Expires - property
1572
@dbus_service_property(_interface, signature="s", access="read")
1573
def Expires_dbus_property(self):
1574
return datetime_to_dbus(self.expires)
1575
1576
# LastApprovalRequest - property
1577
@dbus_service_property(_interface, signature="s", access="read")
1578
def LastApprovalRequest_dbus_property(self):
1579
return datetime_to_dbus(self.last_approval_request)
1580
1581
# Timeout - property
1582
@dbus_service_property(_interface,
1583
signature="t",
1584
access="readwrite")
1585
def Timeout_dbus_property(self, value=None):
1586
if value is None: # get
1587
return dbus.UInt64(self.timeout.total_seconds() * 1000)
1588
old_timeout = self.timeout
1589
self.timeout = datetime.timedelta(0, 0, 0, value)
1590
# Reschedule disabling
1591
if self.enabled:
1592
now = datetime.datetime.utcnow()
1593
self.expires += self.timeout - old_timeout
1594
if self.expires <= now:
1595
# The timeout has passed
1596
self.disable()
1597
else:
1598
if (getattr(self, "disable_initiator_tag", None)
1599
is None):
1600
return
1601
gobject.source_remove(self.disable_initiator_tag)
1602
self.disable_initiator_tag = gobject.timeout_add(
1603
int((self.expires - now).total_seconds() * 1000),
1604
self.disable)
1605
1606
# ExtendedTimeout - property
1607
@dbus_service_property(_interface,
1608
signature="t",
1609
access="readwrite")
1610
def ExtendedTimeout_dbus_property(self, value=None):
1611
if value is None: # get
1612
return dbus.UInt64(self.extended_timeout.total_seconds()
1613
* 1000)
1614
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1615
1616
# Interval - property
1617
@dbus_service_property(_interface,
1618
signature="t",
1619
access="readwrite")
1620
def Interval_dbus_property(self, value=None):
1621
if value is None: # get
1622
return dbus.UInt64(self.interval.total_seconds() * 1000)
1623
self.interval = datetime.timedelta(0, 0, 0, value)
1624
if getattr(self, "checker_initiator_tag", None) is None:
1625
return
1626
if self.enabled:
1627
# Reschedule checker run
1628
gobject.source_remove(self.checker_initiator_tag)
1629
self.checker_initiator_tag = gobject.timeout_add(
1630
value, self.start_checker)
1631
self.start_checker() # Start one now, too
1632
1633
# Checker - property
1634
@dbus_service_property(_interface,
1635
signature="s",
1636
access="readwrite")
1637
def Checker_dbus_property(self, value=None):
1638
if value is None: # get
1639
return dbus.String(self.checker_command)
1640
self.checker_command = str(value)
1641
1642
# CheckerRunning - property
1643
@dbus_service_property(_interface,
1644
signature="b",
1645
access="readwrite")
1646
def CheckerRunning_dbus_property(self, value=None):
1647
if value is None: # get
1648
return dbus.Boolean(self.checker is not None)
1649
if value:
1650
self.start_checker()
1651
else:
1652
self.stop_checker()
1653
1654
# ObjectPath - property
1655
@dbus_service_property(_interface, signature="o", access="read")
1656
def ObjectPath_dbus_property(self):
1657
return self.dbus_object_path # is already a dbus.ObjectPath
1658
1659
# Secret = property
1660
@dbus_service_property(_interface,
1661
signature="ay",
1662
access="write",
1663
byte_arrays=True)
1664
def Secret_dbus_property(self, value):
1665
self.secret = bytes(value)
1666
1667
del _interface
1668
1669
1670
class ProxyClient(object):
1671
def __init__(self, child_pipe, fpr, address):
1672
self._pipe = child_pipe
1673
self._pipe.send(('init', fpr, address))
1674
if not self._pipe.recv():
1675
raise KeyError(fpr)
1676
1677
def __getattribute__(self, name):
1678
if name == '_pipe':
1679
return super(ProxyClient, self).__getattribute__(name)
1680
self._pipe.send(('getattr', name))
1681
data = self._pipe.recv()
1682
if data[0] == 'data':
1683
return data[1]
1684
if data[0] == 'function':
1685
1686
def func(*args, **kwargs):
1687
self._pipe.send(('funcall', name, args, kwargs))
1688
return self._pipe.recv()[1]
1689
1690
return func
1691
1692
def __setattr__(self, name, value):
1693
if name == '_pipe':
1694
return super(ProxyClient, self).__setattr__(name, value)
1695
self._pipe.send(('setattr', name, value))
1696
1697
1698
class ClientHandler(socketserver.BaseRequestHandler, object):
1699
"""A class to handle client connections.
1700
1701
Instantiated once for each connection to handle it.
371
def still_valid(self):
372
"""Has the timeout not yet passed for this client?"""
373
now = datetime.datetime.now()
374
if self.last_checked_ok is None:
375
return now < (self.created + self.timeout)
376
else:
377
return now < (self.last_checked_ok + self.timeout)
378
379
380
def peer_certificate(session):
381
"Return the peer's OpenPGP certificate as a bytestring"
382
# If not an OpenPGP certificate...
383
if gnutls.library.functions.gnutls_certificate_type_get\
384
(session._c_object) \
385
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP:
386
# ...do the normal thing
387
return session.peer_certificate
388
list_size = ctypes.c_uint()
389
cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
390
(session._c_object, ctypes.byref(list_size))
391
if list_size.value == 0:
392
return None
393
cert = cert_list[0]
394
return ctypes.string_at(cert.data, cert.size)
395
396
397
def fingerprint(openpgp):
398
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
399
# New empty GnuTLS certificate
400
crt = gnutls.library.types.gnutls_openpgp_crt_t()
401
gnutls.library.functions.gnutls_openpgp_crt_init\
402
(ctypes.byref(crt))
403
# New GnuTLS "datum" with the OpenPGP public key
404
datum = gnutls.library.types.gnutls_datum_t\
405
(ctypes.cast(ctypes.c_char_p(openpgp),
406
ctypes.POINTER(ctypes.c_ubyte)),
407
ctypes.c_uint(len(openpgp)))
408
# Import the OpenPGP public key into the certificate
409
ret = gnutls.library.functions.gnutls_openpgp_crt_import\
410
(crt,
411
ctypes.byref(datum),
412
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
413
# New buffer for the fingerprint
414
buffer = ctypes.create_string_buffer(20)
415
buffer_length = ctypes.c_size_t()
416
# Get the fingerprint from the certificate into the buffer
417
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
418
(crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
419
# Deinit the certificate
420
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
421
# Convert the buffer to a Python bytestring
422
fpr = ctypes.string_at(buffer, buffer_length.value)
423
# Convert the bytestring to hexadecimal notation
424
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
425
return hex_fpr
426
427
428
class tcp_handler(SocketServer.BaseRequestHandler, object):
429
"""A TCP request handler class.
430
Instantiated by IPv6_TCPServer for each request to handle it.
1702
431
Note: This will run in its own forked process."""
1703
432
1704
433
def handle(self):
1705
with contextlib.closing(self.server.child_pipe) as child_pipe:
1706
logger.info("TCP connection from: %s",
1707
str(self.client_address))
1708
logger.debug("Pipe FD: %d",
1709
self.server.child_pipe.fileno())
1710
1711
session = gnutls.connection.ClientSession(
1712
self.request, gnutls.connection .X509Credentials())
1713
1714
# Note: gnutls.connection.X509Credentials is really a
1715
# generic GnuTLS certificate credentials object so long as
1716
# no X.509 keys are added to it. Therefore, we can use it
1717
# here despite using OpenPGP certificates.
1718
1719
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1720
# "+AES-256-CBC", "+SHA1",
1721
# "+COMP-NULL", "+CTYPE-OPENPGP",
1722
# "+DHE-DSS"))
1723
# Use a fallback default, since this MUST be set.
1724
priority = self.server.gnutls_priority
1725
if priority is None:
1726
priority = "NORMAL"
1727
gnutls.library.functions.gnutls_priority_set_direct(
1728
session._c_object, priority, None)
1729
1730
# Start communication using the Mandos protocol
1731
# Get protocol number
1732
line = self.request.makefile().readline()
1733
logger.debug("Protocol version: %r", line)
1734
try:
1735
if int(line.strip().split()[0]) > 1:
1736
raise RuntimeError(line)
1737
except (ValueError, IndexError, RuntimeError) as error:
1738
logger.error("Unknown protocol version: %s", error)
1739
return
1740
1741
# Start GnuTLS connection
1742
try:
1743
session.handshake()
1744
except gnutls.errors.GNUTLSError as error:
1745
logger.warning("Handshake failed: %s", error)
1746
# Do not run session.bye() here: the session is not
1747
# established. Just abandon the request.
1748
return
1749
logger.debug("Handshake succeeded")
1750
1751
approval_required = False
1752
try:
1753
try:
1754
fpr = self.fingerprint(
1755
self.peer_certificate(session))
1756
except (TypeError,
1757
gnutls.errors.GNUTLSError) as error:
1758
logger.warning("Bad certificate: %s", error)
1759
return
1760
logger.debug("Fingerprint: %s", fpr)
1761
1762
try:
1763
client = ProxyClient(child_pipe, fpr,
1764
self.client_address)
1765
except KeyError:
1766
return
1767
1768
if client.approval_delay:
1769
delay = client.approval_delay
1770
client.approvals_pending += 1
1771
approval_required = True
1772
1773
while True:
1774
if not client.enabled:
1775
logger.info("Client %s is disabled",
1776
client.name)
1777
if self.server.use_dbus:
1778
# Emit D-Bus signal
1779
client.Rejected("Disabled")
1780
return
1781
1782
if client.approved or not client.approval_delay:
1783
#We are approved or approval is disabled
1784
break
1785
elif client.approved is None:
1786
logger.info("Client %s needs approval",
1787
client.name)
1788
if self.server.use_dbus:
1789
# Emit D-Bus signal
1790
client.NeedApproval(
1791
client.approval_delay.total_seconds()
1792
* 1000, client.approved_by_default)
1793
else:
1794
logger.warning("Client %s was not approved",
1795
client.name)
1796
if self.server.use_dbus:
1797
# Emit D-Bus signal
1798
client.Rejected("Denied")
1799
return
1800
1801
#wait until timeout or approved
1802
time = datetime.datetime.now()
1803
client.changedstate.acquire()
1804
client.changedstate.wait(delay.total_seconds())
1805
client.changedstate.release()
1806
time2 = datetime.datetime.now()
1807
if (time2 - time) >= delay:
1808
if not client.approved_by_default:
1809
logger.warning("Client %s timed out while"
1810
" waiting for approval",
1811
client.name)
1812
if self.server.use_dbus:
1813
# Emit D-Bus signal
1814
client.Rejected("Approval timed out")
1815
return
1816
else:
1817
break
1818
else:
1819
delay -= time2 - time
1820
1821
sent_size = 0
1822
while sent_size < len(client.secret):
1823
try:
1824
sent = session.send(client.secret[sent_size:])
1825
except gnutls.errors.GNUTLSError as error:
1826
logger.warning("gnutls send failed",
1827
exc_info=error)
1828
return
1829
logger.debug("Sent: %d, remaining: %d", sent,
1830
len(client.secret) - (sent_size
1831
+ sent))
1832
sent_size += sent
1833
1834
logger.info("Sending secret to %s", client.name)
1835
# bump the timeout using extended_timeout
1836
client.bump_timeout(client.extended_timeout)
1837
if self.server.use_dbus:
1838
# Emit D-Bus signal
1839
client.GotSecret()
1840
1841
finally:
1842
if approval_required:
1843
client.approvals_pending -= 1
1844
try:
1845
session.bye()
1846
except gnutls.errors.GNUTLSError as error:
1847
logger.warning("GnuTLS bye failed",
1848
exc_info=error)
1849
1850
@staticmethod
1851
def peer_certificate(session):
1852
"Return the peer's OpenPGP certificate as a bytestring"
1853
# If not an OpenPGP certificate...
1854
if (gnutls.library.functions.gnutls_certificate_type_get(
1855
session._c_object)
1856
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1857
# ...do the normal thing
1858
return session.peer_certificate
1859
list_size = ctypes.c_uint(1)
1860
cert_list = (gnutls.library.functions
1861
.gnutls_certificate_get_peers
1862
(session._c_object, ctypes.byref(list_size)))
1863
if not bool(cert_list) and list_size.value != 0:
1864
raise gnutls.errors.GNUTLSError("error getting peer"
1865
" certificate")
1866
if list_size.value == 0:
1867
return None
1868
cert = cert_list[0]
1869
return ctypes.string_at(cert.data, cert.size)
1870
1871
@staticmethod
1872
def fingerprint(openpgp):
1873
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1874
# New GnuTLS "datum" with the OpenPGP public key
1875
datum = gnutls.library.types.gnutls_datum_t(
1876
ctypes.cast(ctypes.c_char_p(openpgp),
1877
ctypes.POINTER(ctypes.c_ubyte)),
1878
ctypes.c_uint(len(openpgp)))
1879
# New empty GnuTLS certificate
1880
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1881
gnutls.library.functions.gnutls_openpgp_crt_init(
1882
ctypes.byref(crt))
1883
# Import the OpenPGP public key into the certificate
1884
gnutls.library.functions.gnutls_openpgp_crt_import(
1885
crt, ctypes.byref(datum),
1886
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
1887
# Verify the self signature in the key
1888
crtverify = ctypes.c_uint()
1889
gnutls.library.functions.gnutls_openpgp_crt_verify_self(
1890
crt, 0, ctypes.byref(crtverify))
1891
if crtverify.value != 0:
1892
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1893
raise gnutls.errors.CertificateSecurityError(
1894
"Verify failed")
1895
# New buffer for the fingerprint
1896
buf = ctypes.create_string_buffer(20)
1897
buf_len = ctypes.c_size_t()
1898
# Get the fingerprint from the certificate into the buffer
1899
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint(
1900
crt, ctypes.byref(buf), ctypes.byref(buf_len))
1901
# Deinit the certificate
1902
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1903
# Convert the buffer to a Python bytestring
1904
fpr = ctypes.string_at(buf, buf_len.value)
1905
# Convert the bytestring to hexadecimal notation
1906
hex_fpr = binascii.hexlify(fpr).upper()
1907
return hex_fpr
1908
1909
1910
class MultiprocessingMixIn(object):
1911
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1912
1913
def sub_process_main(self, request, address):
1914
try:
1915
self.finish_request(request, address)
1916
except Exception:
1917
self.handle_error(request, address)
1918
self.close_request(request)
1919
1920
def process_request(self, request, address):
1921
"""Start a new process to process the request."""
1922
proc = multiprocessing.Process(target = self.sub_process_main,
1923
args = (request, address))
1924
proc.start()
1925
return proc
1926
1927
1928
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1929
""" adds a pipe to the MixIn """
1930
1931
def process_request(self, request, client_address):
1932
"""Overrides and wraps the original process_request().
1933
1934
This function creates a new pipe in self.pipe
1935
"""
1936
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1937
1938
proc = MultiprocessingMixIn.process_request(self, request,
1939
client_address)
1940
self.child_pipe.close()
1941
self.add_pipe(parent_pipe, proc)
1942
1943
def add_pipe(self, parent_pipe, proc):
1944
"""Dummy function; override as necessary"""
1945
raise NotImplementedError()
1946
1947
1948
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1949
socketserver.TCPServer, object):
1950
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1951
434
logger.debug(u"TCP connection from: %s",
435
unicode(self.client_address))
436
437
line = self.request.makefile().readline()
438
logger.debug(u"Protocol version: %r", line)
439
try:
440
if int(line.strip().split()[0]) > 1:
441
raise RuntimeError
442
except (ValueError, IndexError, RuntimeError), error:
443
logger.error(u"Unknown protocol version: %s", error)
444
return
445
446
session = gnutls.connection.ClientSession\
447
(self.request, gnutls.connection.X509Credentials())
448
# Note: gnutls.connection.X509Credentials is really a generic
449
# GnuTLS certificate credentials object so long as no X.509
450
# keys are added to it. Therefore, we can use it here despite
451
# using OpenPGP certificates.
452
453
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
454
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
455
# "+DHE-DSS"))
456
priority = "NORMAL" # Fallback default, since this
457
# MUST be set.
458
if self.server.settings["priority"]:
459
priority = self.server.settings["priority"]
460
gnutls.library.functions.gnutls_priority_set_direct\
461
(session._c_object, priority, None);
462
463
try:
464
session.handshake()
465
except gnutls.errors.GNUTLSError, error:
466
logger.debug(u"Handshake failed: %s", error)
467
# Do not run session.bye() here: the session is not
468
# established. Just abandon the request.
469
return
470
try:
471
fpr = fingerprint(peer_certificate(session))
472
except (TypeError, gnutls.errors.GNUTLSError), error:
473
logger.debug(u"Bad certificate: %s", error)
474
session.bye()
475
return
476
logger.debug(u"Fingerprint: %s", fpr)
477
client = None
478
for c in self.server.clients:
479
if c.fingerprint == fpr:
480
client = c
481
break
482
if not client:
483
logger.debug(u"Client not found for fingerprint: %s", fpr)
484
session.bye()
485
return
486
# Have to check if client.still_valid(), since it is possible
487
# that the client timed out while establishing the GnuTLS
488
# session.
489
if not client.still_valid():
490
logger.debug(u"Client %(name)s is invalid", vars(client))
491
session.bye()
492
return
493
sent_size = 0
494
while sent_size < len(client.secret):
495
sent = session.send(client.secret[sent_size:])
496
logger.debug(u"Sent: %d, remaining: %d",
497
sent, len(client.secret)
498
- (sent_size + sent))
499
sent_size += sent
500
session.bye()
501
502
503
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
504
"""IPv6 TCP server. Accepts 'None' as address and/or port.
1952
505
Attributes:
1953
enabled: Boolean; whether this server is activated yet
1954
interface: None or a network interface name (string)
1955
use_ipv6: Boolean; to use IPv6 or not
506
settings: Server settings
507
clients: Set() of Client objects
1956
508
"""
1957
1958
def __init__(self, server_address, RequestHandlerClass,
1959
interface=None,
1960
use_ipv6=True,
1961
socketfd=None):
1962
"""If socketfd is set, use that file descriptor instead of
1963
creating a new one with socket.socket().
1964
"""
1965
self.interface = interface
1966
if use_ipv6:
1967
self.address_family = socket.AF_INET6
1968
if socketfd is not None:
1969
# Save the file descriptor
1970
self.socketfd = socketfd
1971
# Save the original socket.socket() function
1972
self.socket_socket = socket.socket
1973
# To implement --socket, we monkey patch socket.socket.
1974
#
1975
# (When socketserver.TCPServer is a new-style class, we
1976
# could make self.socket into a property instead of monkey
1977
# patching socket.socket.)
1978
#
1979
# Create a one-time-only replacement for socket.socket()
1980
@functools.wraps(socket.socket)
1981
def socket_wrapper(*args, **kwargs):
1982
# Restore original function so subsequent calls are
1983
# not affected.
1984
socket.socket = self.socket_socket
1985
del self.socket_socket
1986
# This time only, return a new socket object from the
1987
# saved file descriptor.
1988
return socket.fromfd(self.socketfd, *args, **kwargs)
1989
# Replace socket.socket() function with wrapper
1990
socket.socket = socket_wrapper
1991
# The socketserver.TCPServer.__init__ will call
1992
# socket.socket(), which might be our replacement,
1993
# socket_wrapper(), if socketfd was set.
1994
socketserver.TCPServer.__init__(self, server_address,
1995
RequestHandlerClass)
1996
509
address_family = socket.AF_INET6
510
def __init__(self, *args, **kwargs):
511
if "settings" in kwargs:
512
self.settings = kwargs["settings"]
513
del kwargs["settings"]
514
if "clients" in kwargs:
515
self.clients = kwargs["clients"]
516
del kwargs["clients"]
517
return super(type(self), self).__init__(*args, **kwargs)
1997
518
def server_bind(self):
1998
519
"""This overrides the normal server_bind() function
1999
520
to bind to an interface if one was specified, and also NOT to
2000
521
bind to an address or port if they were not specified."""
2001
if self.interface is not None:
2002
if SO_BINDTODEVICE is None:
2003
logger.error("SO_BINDTODEVICE does not exist;"
2004
" cannot bind to interface %s",
2005
self.interface)
2006
else:
2007
try:
2008
self.socket.setsockopt(
2009
socket.SOL_SOCKET, SO_BINDTODEVICE,
2010
(self.interface + "\0").encode("utf-8"))
2011
except socket.error as error:
2012
if error.errno == errno.EPERM:
2013
logger.error("No permission to bind to"
2014
" interface %s", self.interface)
2015
elif error.errno == errno.ENOPROTOOPT:
2016
logger.error("SO_BINDTODEVICE not available;"
2017
" cannot bind to interface %s",
2018
self.interface)
2019
elif error.errno == errno.ENODEV:
2020
logger.error("Interface %s does not exist,"
2021
" cannot bind", self.interface)
2022
else:
2023
raise
522
if self.settings["interface"]:
523
# 25 is from /usr/include/asm-i486/socket.h
524
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
525
try:
526
self.socket.setsockopt(socket.SOL_SOCKET,
527
SO_BINDTODEVICE,
528
self.settings["interface"])
529
except socket.error, error:
530
if error[0] == errno.EPERM:
531
logger.warning(u"No permission to"
532
u" bind to interface %s",
533
self.settings["interface"])
534
else:
535
raise error
2024
536
# Only bind(2) the socket if we really need to.
2025
537
if self.server_address[0] or self.server_address[1]:
2026
538
if not self.server_address[0]:
2027
if self.address_family == socket.AF_INET6:
2028
any_address = "::" # in6addr_any
2029
else:
2030
any_address = "0.0.0.0" # INADDR_ANY
2031
self.server_address = (any_address,
539
in6addr_any = "::"
540
self.server_address = (in6addr_any,
2032
541
self.server_address[1])
2033
elif not self.server_address[1]:
2034
self.server_address = (self.server_address[0], 0)
2035
# if self.interface:
2036
# self.server_address = (self.server_address[0],
2037
# 0, # port
2038
# 0, # flowinfo
2039
# if_nametoindex
2040
# (self.interface))
2041
return socketserver.TCPServer.server_bind(self)
2042
2043
2044
class MandosServer(IPv6_TCPServer):
2045
"""Mandos server.
2046
2047
Attributes:
2048
clients: set of Client objects
2049
gnutls_priority GnuTLS priority string
2050
use_dbus: Boolean; to emit D-Bus signals or not
2051
2052
Assumes a gobject.MainLoop event loop.
2053
"""
2054
2055
def __init__(self, server_address, RequestHandlerClass,
2056
interface=None,
2057
use_ipv6=True,
2058
clients=None,
2059
gnutls_priority=None,
2060
use_dbus=True,
2061
socketfd=None):
2062
self.enabled = False
2063
self.clients = clients
2064
if self.clients is None:
2065
self.clients = {}
2066
self.use_dbus = use_dbus
2067
self.gnutls_priority = gnutls_priority
2068
IPv6_TCPServer.__init__(self, server_address,
2069
RequestHandlerClass,
2070
interface = interface,
2071
use_ipv6 = use_ipv6,
2072
socketfd = socketfd)
2073
2074
def server_activate(self):
2075
if self.enabled:
2076
return socketserver.TCPServer.server_activate(self)
2077
2078
def enable(self):
2079
self.enabled = True
2080
2081
def add_pipe(self, parent_pipe, proc):
2082
# Call "handle_ipc" for both data and EOF events
2083
gobject.io_add_watch(
2084
parent_pipe.fileno(),
2085
gobject.IO_IN | gobject.IO_HUP,
2086
functools.partial(self.handle_ipc,
2087
parent_pipe = parent_pipe,
2088
proc = proc))
2089
2090
def handle_ipc(self, source, condition,
2091
parent_pipe=None,
2092
proc = None,
2093
client_object=None):
2094
# error, or the other end of multiprocessing.Pipe has closed
2095
if condition & (gobject.IO_ERR | gobject.IO_HUP):
2096
# Wait for other process to exit
2097
proc.join()
2098
return False
2099
2100
# Read a request from the child
2101
request = parent_pipe.recv()
2102
command = request[0]
2103
2104
if command == 'init':
2105
fpr = request[1]
2106
address = request[2]
2107
2108
for c in self.clients.itervalues():
2109
if c.fingerprint == fpr:
2110
client = c
2111
break
2112
else:
2113
logger.info("Client not found for fingerprint: %s, ad"
2114
"dress: %s", fpr, address)
2115
if self.use_dbus:
2116
# Emit D-Bus signal
2117
mandos_dbus_service.ClientNotFound(fpr,
2118
address[0])
2119
parent_pipe.send(False)
2120
return False
2121
2122
gobject.io_add_watch(
2123
parent_pipe.fileno(),
2124
gobject.IO_IN | gobject.IO_HUP,
2125
functools.partial(self.handle_ipc,
2126
parent_pipe = parent_pipe,
2127
proc = proc,
2128
client_object = client))
2129
parent_pipe.send(True)
2130
# remove the old hook in favor of the new above hook on
2131
# same fileno
2132
return False
2133
if command == 'funcall':
2134
funcname = request[1]
2135
args = request[2]
2136
kwargs = request[3]
2137
2138
parent_pipe.send(('data', getattr(client_object,
2139
funcname)(*args,
2140
**kwargs)))
2141
2142
if command == 'getattr':
2143
attrname = request[1]
2144
if callable(client_object.__getattribute__(attrname)):
2145
parent_pipe.send(('function', ))
2146
else:
2147
parent_pipe.send((
2148
'data', client_object.__getattribute__(attrname)))
2149
2150
if command == 'setattr':
2151
attrname = request[1]
2152
value = request[2]
2153
setattr(client_object, attrname, value)
2154
2155
return True
2156
2157
2158
def rfc3339_duration_to_delta(duration):
2159
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2160
2161
>>> rfc3339_duration_to_delta("P7D")
2162
datetime.timedelta(7)
2163
>>> rfc3339_duration_to_delta("PT60S")
2164
datetime.timedelta(0, 60)
2165
>>> rfc3339_duration_to_delta("PT60M")
2166
datetime.timedelta(0, 3600)
2167
>>> rfc3339_duration_to_delta("PT24H")
2168
datetime.timedelta(1)
2169
>>> rfc3339_duration_to_delta("P1W")
2170
datetime.timedelta(7)
2171
>>> rfc3339_duration_to_delta("PT5M30S")
2172
datetime.timedelta(0, 330)
2173
>>> rfc3339_duration_to_delta("P1DT3M20S")
2174
datetime.timedelta(1, 200)
2175
"""
2176
2177
# Parsing an RFC 3339 duration with regular expressions is not
2178
# possible - there would have to be multiple places for the same
2179
# values, like seconds. The current code, while more esoteric, is
2180
# cleaner without depending on a parsing library. If Python had a
2181
# built-in library for parsing we would use it, but we'd like to
2182
# avoid excessive use of external libraries.
2183
2184
# New type for defining tokens, syntax, and semantics all-in-one
2185
Token = collections.namedtuple("Token", (
2186
"regexp", # To match token; if "value" is not None, must have
2187
# a "group" containing digits
2188
"value", # datetime.timedelta or None
2189
"followers")) # Tokens valid after this token
2190
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2191
# the "duration" ABNF definition in RFC 3339, Appendix A.
2192
token_end = Token(re.compile(r"$"), None, frozenset())
2193
token_second = Token(re.compile(r"(\d+)S"),
2194
datetime.timedelta(seconds=1),
2195
frozenset((token_end, )))
2196
token_minute = Token(re.compile(r"(\d+)M"),
2197
datetime.timedelta(minutes=1),
2198
frozenset((token_second, token_end)))
2199
token_hour = Token(re.compile(r"(\d+)H"),
2200
datetime.timedelta(hours=1),
2201
frozenset((token_minute, token_end)))
2202
token_time = Token(re.compile(r"T"),
2203
None,
2204
frozenset((token_hour, token_minute,
2205
token_second)))
2206
token_day = Token(re.compile(r"(\d+)D"),
2207
datetime.timedelta(days=1),
2208
frozenset((token_time, token_end)))
2209
token_month = Token(re.compile(r"(\d+)M"),
2210
datetime.timedelta(weeks=4),
2211
frozenset((token_day, token_end)))
2212
token_year = Token(re.compile(r"(\d+)Y"),
2213
datetime.timedelta(weeks=52),
2214
frozenset((token_month, token_end)))
2215
token_week = Token(re.compile(r"(\d+)W"),
2216
datetime.timedelta(weeks=1),
2217
frozenset((token_end, )))
2218
token_duration = Token(re.compile(r"P"), None,
2219
frozenset((token_year, token_month,
2220
token_day, token_time,
2221
token_week)))
2222
# Define starting values
2223
value = datetime.timedelta() # Value so far
2224
found_token = None
2225
followers = frozenset((token_duration, )) # Following valid tokens
2226
s = duration # String left to parse
2227
# Loop until end token is found
2228
while found_token is not token_end:
2229
# Search for any currently valid tokens
2230
for token in followers:
2231
match = token.regexp.match(s)
2232
if match is not None:
2233
# Token found
2234
if token.value is not None:
2235
# Value found, parse digits
2236
factor = int(match.group(1), 10)
2237
# Add to value so far
2238
value += factor * token.value
2239
# Strip token from string
2240
s = token.regexp.sub("", s, 1)
2241
# Go to found token
2242
found_token = token
2243
# Set valid next tokens
2244
followers = found_token.followers
2245
break
2246
else:
2247
# No currently valid tokens were found
2248
raise ValueError("Invalid RFC 3339 duration: {!r}"
2249
.format(duration))
2250
# End token found
2251
return value
542
elif self.server_address[1] is None:
543
self.server_address = (self.server_address[0],
544
0)
545
return super(type(self), self).server_bind()
2252
546
2253
547
2254
548
def string_to_delta(interval):
2255
549
"""Parse a string and return a datetime.timedelta
2256
550
2257
551
>>> string_to_delta('7d')
2258
552
datetime.timedelta(7)
2259
553
>>> string_to_delta('60s')
2262
556
datetime.timedelta(0, 3600)
2263
557
>>> string_to_delta('24h')
2264
558
datetime.timedelta(1)
2265
>>> string_to_delta('1w')
559
>>> string_to_delta(u'1w')
2266
560
datetime.timedelta(7)
2267
>>> string_to_delta('5m 30s')
2268
datetime.timedelta(0, 330)
2269
561
"""
2270
2271
try:
2272
return rfc3339_duration_to_delta(interval)
2273
except ValueError:
2274
pass
2275
2276
timevalue = datetime.timedelta(0)
2277
for s in interval.split():
2278
try:
2279
suffix = s[-1]
2280
value = int(s[:-1])
2281
if suffix == "d":
2282
delta = datetime.timedelta(value)
2283
elif suffix == "s":
2284
delta = datetime.timedelta(0, value)
2285
elif suffix == "m":
2286
delta = datetime.timedelta(0, 0, 0, 0, value)
2287
elif suffix == "h":
2288
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
2289
elif suffix == "w":
2290
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
2291
else:
2292
raise ValueError("Unknown suffix {!r}".format(suffix))
2293
except IndexError as e:
2294
raise ValueError(*(e.args))
2295
timevalue += delta
2296
return timevalue
2297
2298
2299
def daemon(nochdir = False, noclose = False):
562
try:
563
suffix=unicode(interval[-1])
564
value=int(interval[:-1])
565
if suffix == u"d":
566
delta = datetime.timedelta(value)
567
elif suffix == u"s":
568
delta = datetime.timedelta(0, value)
569
elif suffix == u"m":
570
delta = datetime.timedelta(0, 0, 0, 0, value)
571
elif suffix == u"h":
572
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
573
elif suffix == u"w":
574
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
575
else:
576
raise ValueError
577
except (ValueError, IndexError):
578
raise ValueError
579
return delta
580
581
582
def server_state_changed(state):
583
"""Derived from the Avahi example code"""
584
if state == avahi.SERVER_COLLISION:
585
logger.warning(u"Server name collision")
586
service.remove()
587
elif state == avahi.SERVER_RUNNING:
588
service.add()
589
590
591
def entry_group_state_changed(state, error):
592
"""Derived from the Avahi example code"""
593
logger.debug(u"state change: %i", state)
594
595
if state == avahi.ENTRY_GROUP_ESTABLISHED:
596
logger.debug(u"Service established.")
597
elif state == avahi.ENTRY_GROUP_COLLISION:
598
logger.warning(u"Service name collision.")
599
service.rename()
600
elif state == avahi.ENTRY_GROUP_FAILURE:
601
logger.critical(u"Error in group state changed %s",
602
unicode(error))
603
raise AvahiGroupError("State changed: %s", str(error))
604
605
def if_nametoindex(interface):
606
"""Call the C function if_nametoindex(), or equivalent"""
607
global if_nametoindex
608
try:
609
if "ctypes.util" not in sys.modules:
610
import ctypes.util
611
if_nametoindex = ctypes.cdll.LoadLibrary\
612
(ctypes.util.find_library("c")).if_nametoindex
613
except (OSError, AttributeError):
614
if "struct" not in sys.modules:
615
import struct
616
if "fcntl" not in sys.modules:
617
import fcntl
618
def if_nametoindex(interface):
619
"Get an interface index the hard way, i.e. using fcntl()"
620
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
621
s = socket.socket()
622
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
623
struct.pack("16s16x", interface))
624
s.close()
625
interface_index = struct.unpack("I", ifreq[16:20])[0]
626
return interface_index
627
return if_nametoindex(interface)
628
629
630
def daemon(nochdir, noclose):
2300
631
"""See daemon(3). Standard BSD Unix function.
2301
2302
632
This should really exist as os.daemon, but it doesn't (yet)."""
2303
633
if os.fork():
2304
634
sys.exit()
2305
635
os.setsid()
2306
636
if not nochdir:
2307
637
os.chdir("/")
2308
if os.fork():
2309
sys.exit()
2310
638
if not noclose:
2311
639
# Close all standard open file descriptors
2312
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
640
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2313
641
if not stat.S_ISCHR(os.fstat(null).st_mode):
2314
642
raise OSError(errno.ENODEV,
2315
"{} not a character device"
2316
.format(os.devnull))
643
"/dev/null not a character device")
2317
644
os.dup2(null, sys.stdin.fileno())
2318
645
os.dup2(null, sys.stdout.fileno())
2319
646
os.dup2(null, sys.stderr.fileno())
2322
649
2323
650
2324
651
def main():
2325
2326
##################################################################
2327
# Parsing of options, both command line and config file
2328
2329
parser = argparse.ArgumentParser()
2330
parser.add_argument("-v", "--version", action="version",
2331
version = "%(prog)s {}".format(version),
2332
help="show version number and exit")
2333
parser.add_argument("-i", "--interface", metavar="IF",
2334
help="Bind to interface IF")
2335
parser.add_argument("-a", "--address",
2336
help="Address to listen for requests on")
2337
parser.add_argument("-p", "--port", type=int,
2338
help="Port number to receive requests on")
2339
parser.add_argument("--check", action="store_true",
2340
help="Run self-test")
2341
parser.add_argument("--debug", action="store_true",
2342
help="Debug mode; run in foreground and log"
2343
" to terminal", default=None)
2344
parser.add_argument("--debuglevel", metavar="LEVEL",
2345
help="Debug level for stdout output")
2346
parser.add_argument("--priority", help="GnuTLS"
2347
" priority string (see GnuTLS documentation)")
2348
parser.add_argument("--servicename",
2349
metavar="NAME", help="Zeroconf service name")
2350
parser.add_argument("--configdir",
2351
default="/etc/mandos", metavar="DIR",
2352
help="Directory to search for configuration"
2353
" files")
2354
parser.add_argument("--no-dbus", action="store_false",
2355
dest="use_dbus", help="Do not provide D-Bus"
2356
" system bus interface", default=None)
2357
parser.add_argument("--no-ipv6", action="store_false",
2358
dest="use_ipv6", help="Do not use IPv6",
2359
default=None)
2360
parser.add_argument("--no-restore", action="store_false",
2361
dest="restore", help="Do not restore stored"
2362
" state", default=None)
2363
parser.add_argument("--socket", type=int,
2364
help="Specify a file descriptor to a network"
2365
" socket to use instead of creating one")
2366
parser.add_argument("--statedir", metavar="DIR",
2367
help="Directory to save/restore state in")
2368
parser.add_argument("--foreground", action="store_true",
2369
help="Run in foreground", default=None)
2370
parser.add_argument("--no-zeroconf", action="store_false",
2371
dest="zeroconf", help="Do not use Zeroconf",
2372
default=None)
2373
2374
options = parser.parse_args()
652
global main_loop_started
653
main_loop_started = False
654
655
parser = OptionParser()
656
parser.add_option("-i", "--interface", type="string",
657
metavar="IF", help="Bind to interface IF")
658
parser.add_option("-a", "--address", type="string",
659
help="Address to listen for requests on")
660
parser.add_option("-p", "--port", type="int",
661
help="Port number to receive requests on")
662
parser.add_option("--check", action="store_true", default=False,
663
help="Run self-test")
664
parser.add_option("--debug", action="store_true", default=False,
665
help="Debug mode; run in foreground and log to"
666
" terminal")
667
parser.add_option("--priority", type="string", help="GnuTLS"
668
" priority string (see GnuTLS documentation)")
669
parser.add_option("--servicename", type="string", metavar="NAME",
670
help="Zeroconf service name")
671
parser.add_option("--configdir", type="string",
672
default="/etc/mandos", metavar="DIR",
673
help="Directory to search for configuration"
674
" files")
675
(options, args) = parser.parse_args()
2375
676
2376
677
if options.check:
2377
678
import doctest
2378
fail_count, test_count = doctest.testmod()
2379
sys.exit(os.EX_OK if fail_count == 0 else 1)
679
doctest.testmod()
680
sys.exit()
2380
681
2381
682
# Default values for config file for server-global settings
2382
683
server_defaults = { "interface": "",
2384
685
"port": "",
2385
686
"debug": "False",
2386
687
"priority":
2387
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2388
":+SIGN-RSA-SHA224:+SIGN-RSA-RMD160",
688
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2389
689
"servicename": "Mandos",
2390
"use_dbus": "True",
2391
"use_ipv6": "True",
2392
"debuglevel": "",
2393
"restore": "True",
2394
"socket": "",
2395
"statedir": "/var/lib/mandos",
2396
"foreground": "False",
2397
"zeroconf": "True",
2398
}
690
}
2399
691
2400
692
# Parse config file for server-global settings
2401
server_config = configparser.SafeConfigParser(server_defaults)
693
server_config = ConfigParser.SafeConfigParser(server_defaults)
2402
694
del server_defaults
2403
server_config.read(os.path.join(options.configdir, "mandos.conf"))
695
server_config.read(os.path.join(options.configdir, "server.conf"))
696
server_section = "server"
2404
697
# Convert the SafeConfigParser object to a dict
2405
server_settings = server_config.defaults()
2406
# Use the appropriate methods on the non-string config options
2407
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
2408
server_settings[option] = server_config.getboolean("DEFAULT",
2409
option)
2410
if server_settings["port"]:
2411
server_settings["port"] = server_config.getint("DEFAULT",
2412
"port")
2413
if server_settings["socket"]:
2414
server_settings["socket"] = server_config.getint("DEFAULT",
2415
"socket")
2416
# Later, stdin will, and stdout and stderr might, be dup'ed
2417
# over with an opened os.devnull. But we don't want this to
2418
# happen with a supplied network socket.
2419
if 0 <= server_settings["socket"] <= 2:
2420
server_settings["socket"] = os.dup(server_settings
2421
["socket"])
698
server_settings = dict(server_config.items(server_section))
699
# Use getboolean on the boolean config option
700
server_settings["debug"] = server_config.getboolean\
701
(server_section, "debug")
2422
702
del server_config
2423
703
2424
704
# Override the settings from the config file with command line
2425
705
# options, if set.
2426
706
for option in ("interface", "address", "port", "debug",
2427
"priority", "servicename", "configdir", "use_dbus",
2428
"use_ipv6", "debuglevel", "restore", "statedir",
2429
"socket", "foreground", "zeroconf"):
707
"priority", "servicename", "configdir"):
2430
708
value = getattr(options, option)
2431
709
if value is not None:
2432
710
server_settings[option] = value
2433
711
del options
2434
# Force all strings to be unicode
2435
for option in server_settings.keys():
2436
if isinstance(server_settings[option], bytes):
2437
server_settings[option] = (server_settings[option]
2438
.decode("utf-8"))
2439
# Force all boolean options to be boolean
2440
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2441
"foreground", "zeroconf"):
2442
server_settings[option] = bool(server_settings[option])
2443
# Debug implies foreground
2444
if server_settings["debug"]:
2445
server_settings["foreground"] = True
2446
712
# Now we have our good server settings in "server_settings"
2447
713
2448
##################################################################
2449
2450
if (not server_settings["zeroconf"]
2451
and not (server_settings["port"]
2452
or server_settings["socket"] != "")):
2453
parser.error("Needs port or socket to work without Zeroconf")
2454
2455
# For convenience
2456
debug = server_settings["debug"]
2457
debuglevel = server_settings["debuglevel"]
2458
use_dbus = server_settings["use_dbus"]
2459
use_ipv6 = server_settings["use_ipv6"]
2460
stored_state_path = os.path.join(server_settings["statedir"],
2461
stored_state_file)
2462
foreground = server_settings["foreground"]
2463
zeroconf = server_settings["zeroconf"]
2464
2465
if debug:
2466
initlogger(debug, logging.DEBUG)
2467
else:
2468
if not debuglevel:
2469
initlogger(debug)
2470
else:
2471
level = getattr(logging, debuglevel.upper())
2472
initlogger(debug, level)
2473
2474
if server_settings["servicename"] != "Mandos":
2475
syslogger.setFormatter(
2476
logging.Formatter('Mandos ({}) [%(process)d]:'
2477
' %(levelname)s: %(message)s'.format(
2478
server_settings["servicename"])))
2479
2480
714
# Parse config file with clients
2481
client_config = configparser.SafeConfigParser(Client
2482
.client_defaults)
715
client_defaults = { "timeout": "1h",
716
"interval": "5m",
717
"checker": "fping -q -- %%(fqdn)s",
718
}
719
client_config = ConfigParser.SafeConfigParser(client_defaults)
2483
720
client_config.read(os.path.join(server_settings["configdir"],
2484
721
"clients.conf"))
2485
722
2486
global mandos_dbus_service
2487
mandos_dbus_service = None
2488
2489
socketfd = None
2490
if server_settings["socket"] != "":
2491
socketfd = server_settings["socket"]
2492
tcp_server = MandosServer(
2493
(server_settings["address"], server_settings["port"]),
2494
ClientHandler,
2495
interface=(server_settings["interface"] or None),
2496
use_ipv6=use_ipv6,
2497
gnutls_priority=server_settings["priority"],
2498
use_dbus=use_dbus,
2499
socketfd=socketfd)
2500
if not foreground:
2501
pidfilename = "/run/mandos.pid"
2502
if not os.path.isdir("/run/."):
2503
pidfilename = "/var/run/mandos.pid"
2504
pidfile = None
2505
try:
2506
pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
2507
except IOError as e:
2508
logger.error("Could not open file %r", pidfilename,
2509
exc_info=e)
2510
2511
for name in ("_mandos", "mandos", "nobody"):
2512
try:
2513
uid = pwd.getpwnam(name).pw_uid
2514
gid = pwd.getpwnam(name).pw_gid
2515
break
2516
except KeyError:
2517
continue
2518
else:
2519
uid = 65534
2520
gid = 65534
2521
try:
2522
os.setgid(gid)
2523
os.setuid(uid)
2524
except OSError as error:
2525
if error.errno != errno.EPERM:
2526
raise
2527
2528
if debug:
2529
# Enable all possible GnuTLS debugging
2530
2531
# "Use a log level over 10 to enable all debugging options."
2532
# - GnuTLS manual
2533
gnutls.library.functions.gnutls_global_set_log_level(11)
2534
2535
@gnutls.library.types.gnutls_log_func
2536
def debug_gnutls(level, string):
2537
logger.debug("GnuTLS: %s", string[:-1])
2538
2539
gnutls.library.functions.gnutls_global_set_log_function(
2540
debug_gnutls)
2541
2542
# Redirect stdin so all checkers get /dev/null
2543
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2544
os.dup2(null, sys.stdin.fileno())
2545
if null > 2:
2546
os.close(null)
2547
2548
# Need to fork before connecting to D-Bus
2549
if not foreground:
2550
# Close all input and output, do double fork, etc.
2551
daemon()
2552
2553
# multiprocessing will use threads, so before we use gobject we
2554
# need to inform gobject that threads will be used.
2555
gobject.threads_init()
723
global service
724
service = AvahiService(name = server_settings["servicename"],
725
type = "_mandos._tcp", );
726
if server_settings["interface"]:
727
service.interface = if_nametoindex(server_settings["interface"])
2556
728
2557
729
global main_loop
730
global bus
731
global server
2558
732
# From the Avahi example code
2559
DBusGMainLoop(set_as_default=True)
733
DBusGMainLoop(set_as_default=True )
2560
734
main_loop = gobject.MainLoop()
2561
735
bus = dbus.SystemBus()
736
server = dbus.Interface(
737
bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
738
avahi.DBUS_INTERFACE_SERVER )
2562
739
# End of Avahi example code
2563
if use_dbus:
2564
try:
2565
bus_name = dbus.service.BusName("se.recompile.Mandos",
2566
bus,
2567
do_not_queue=True)
2568
old_bus_name = dbus.service.BusName(
2569
"se.bsnet.fukt.Mandos", bus,
2570
do_not_queue=True)
2571
except dbus.exceptions.DBusException as e:
2572
logger.error("Disabling D-Bus:", exc_info=e)
2573
use_dbus = False
2574
server_settings["use_dbus"] = False
2575
tcp_server.use_dbus = False
2576
if zeroconf:
2577
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2578
service = AvahiServiceToSyslog(
2579
name = server_settings["servicename"],
2580
servicetype = "_mandos._tcp",
2581
protocol = protocol,
2582
bus = bus)
2583
if server_settings["interface"]:
2584
service.interface = if_nametoindex(
2585
server_settings["interface"].encode("utf-8"))
2586
2587
global multiprocessing_manager
2588
multiprocessing_manager = multiprocessing.Manager()
2589
2590
client_class = Client
2591
if use_dbus:
2592
client_class = functools.partial(ClientDBus, bus = bus)
2593
2594
client_settings = Client.config_parser(client_config)
2595
old_client_settings = {}
2596
clients_data = {}
2597
2598
# This is used to redirect stdout and stderr for checker processes
2599
global wnull
2600
wnull = open(os.devnull, "w") # A writable /dev/null
2601
# Only used if server is running in foreground but not in debug
2602
# mode
2603
if debug or not foreground:
2604
wnull.close()
2605
2606
# Get client data and settings from last running state.
2607
if server_settings["restore"]:
2608
try:
2609
with open(stored_state_path, "rb") as stored_state:
2610
clients_data, old_client_settings = pickle.load(
2611
stored_state)
2612
os.remove(stored_state_path)
2613
except IOError as e:
2614
if e.errno == errno.ENOENT:
2615
logger.warning("Could not load persistent state:"
2616
" {}".format(os.strerror(e.errno)))
2617
else:
2618
logger.critical("Could not load persistent state:",
2619
exc_info=e)
2620
raise
2621
except EOFError as e:
2622
logger.warning("Could not load persistent state: "
2623
"EOFError:",
2624
exc_info=e)
2625
2626
with PGPEngine() as pgp:
2627
for client_name, client in clients_data.items():
2628
# Skip removed clients
2629
if client_name not in client_settings:
2630
continue
2631
2632
# Decide which value to use after restoring saved state.
2633
# We have three different values: Old config file,
2634
# new config file, and saved state.
2635
# New config value takes precedence if it differs from old
2636
# config value, otherwise use saved state.
2637
for name, value in client_settings[client_name].items():
2638
try:
2639
# For each value in new config, check if it
2640
# differs from the old config value (Except for
2641
# the "secret" attribute)
2642
if (name != "secret"
2643
and (value !=
2644
old_client_settings[client_name][name])):
2645
client[name] = value
2646
except KeyError:
2647
pass
2648
2649
# Clients who has passed its expire date can still be
2650
# enabled if its last checker was successful. Clients
2651
# whose checker succeeded before we stored its state is
2652
# assumed to have successfully run all checkers during
2653
# downtime.
2654
if client["enabled"]:
2655
if datetime.datetime.utcnow() >= client["expires"]:
2656
if not client["last_checked_ok"]:
2657
logger.warning(
2658
"disabling client {} - Client never "
2659
"performed a successful checker".format(
2660
client_name))
2661
client["enabled"] = False
2662
elif client["last_checker_status"] != 0:
2663
logger.warning(
2664
"disabling client {} - Client last"
2665
" checker failed with error code"
2666
" {}".format(
2667
client_name,
2668
client["last_checker_status"]))
2669
client["enabled"] = False
2670
else:
2671
client["expires"] = (
2672
datetime.datetime.utcnow()
2673
+ client["timeout"])
2674
logger.debug("Last checker succeeded,"
2675
" keeping {} enabled".format(
2676
client_name))
2677
try:
2678
client["secret"] = pgp.decrypt(
2679
client["encrypted_secret"],
2680
client_settings[client_name]["secret"])
2681
except PGPError:
2682
# If decryption fails, we use secret from new settings
2683
logger.debug("Failed to decrypt {} old secret".format(
2684
client_name))
2685
client["secret"] = (client_settings[client_name]
2686
["secret"])
2687
2688
# Add/remove clients based on new changes made to config
2689
for client_name in (set(old_client_settings)
2690
- set(client_settings)):
2691
del clients_data[client_name]
2692
for client_name in (set(client_settings)
2693
- set(old_client_settings)):
2694
clients_data[client_name] = client_settings[client_name]
2695
2696
# Create all client objects
2697
for client_name, client in clients_data.items():
2698
tcp_server.clients[client_name] = client_class(
2699
name = client_name,
2700
settings = client,
2701
server_settings = server_settings)
2702
2703
if not tcp_server.clients:
2704
logger.warning("No clients defined")
2705
2706
if not foreground:
2707
if pidfile is not None:
2708
pid = os.getpid()
2709
try:
2710
with pidfile:
2711
print(pid, file=pidfile)
2712
except IOError:
2713
logger.error("Could not write to file %r with PID %d",
2714
pidfilename, pid)
2715
del pidfile
2716
del pidfilename
2717
2718
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2719
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2720
2721
if use_dbus:
2722
2723
@alternate_dbus_interfaces(
2724
{ "se.recompile.Mandos": "se.bsnet.fukt.Mandos" })
2725
class MandosDBusService(DBusObjectWithProperties):
2726
"""A D-Bus proxy object"""
2727
2728
def __init__(self):
2729
dbus.service.Object.__init__(self, bus, "/")
2730
2731
_interface = "se.recompile.Mandos"
2732
2733
@dbus_interface_annotations(_interface)
2734
def _foo(self):
2735
return {
2736
"org.freedesktop.DBus.Property.EmitsChangedSignal":
2737
"false" }
2738
2739
@dbus.service.signal(_interface, signature="o")
2740
def ClientAdded(self, objpath):
2741
"D-Bus signal"
2742
pass
2743
2744
@dbus.service.signal(_interface, signature="ss")
2745
def ClientNotFound(self, fingerprint, address):
2746
"D-Bus signal"
2747
pass
2748
2749
@dbus.service.signal(_interface, signature="os")
2750
def ClientRemoved(self, objpath, name):
2751
"D-Bus signal"
2752
pass
2753
2754
@dbus.service.method(_interface, out_signature="ao")
2755
def GetAllClients(self):
2756
"D-Bus method"
2757
return dbus.Array(c.dbus_object_path for c in
2758
tcp_server.clients.itervalues())
2759
2760
@dbus.service.method(_interface,
2761
out_signature="a{oa{sv}}")
2762
def GetAllClientsWithProperties(self):
2763
"D-Bus method"
2764
return dbus.Dictionary(
2765
{ c.dbus_object_path: c.GetAll("")
2766
for c in tcp_server.clients.itervalues() },
2767
signature="oa{sv}")
2768
2769
@dbus.service.method(_interface, in_signature="o")
2770
def RemoveClient(self, object_path):
2771
"D-Bus method"
2772
for c in tcp_server.clients.itervalues():
2773
if c.dbus_object_path == object_path:
2774
del tcp_server.clients[c.name]
2775
c.remove_from_connection()
2776
# Don't signal anything except ClientRemoved
2777
c.disable(quiet=True)
2778
# Emit D-Bus signal
2779
self.ClientRemoved(object_path, c.name)
2780
return
2781
raise KeyError(object_path)
2782
2783
del _interface
2784
2785
mandos_dbus_service = MandosDBusService()
740
741
debug = server_settings["debug"]
742
743
if debug:
744
console = logging.StreamHandler()
745
# console.setLevel(logging.DEBUG)
746
console.setFormatter(logging.Formatter\
747
('%(levelname)s: %(message)s'))
748
logger.addHandler(console)
749
del console
750
751
clients = Set()
752
def remove_from_clients(client):
753
clients.remove(client)
754
if not clients:
755
logger.debug(u"No clients left, exiting")
756
sys.exit()
757
758
clients.update(Set(Client(name=section,
759
stop_hook = remove_from_clients,
760
**(dict(client_config\
761
.items(section))))
762
for section in client_config.sections()))
763
764
if not debug:
765
daemon(False, False)
2786
766
2787
767
def cleanup():
2788
768
"Cleanup function; run on exit"
2789
if zeroconf:
2790
service.cleanup()
2791
2792
multiprocessing.active_children()
2793
wnull.close()
2794
if not (tcp_server.clients or client_settings):
2795
return
2796
2797
# Store client before exiting. Secrets are encrypted with key
2798
# based on what config file has. If config file is
2799
# removed/edited, old secret will thus be unrecovable.
2800
clients = {}
2801
with PGPEngine() as pgp:
2802
for client in tcp_server.clients.itervalues():
2803
key = client_settings[client.name]["secret"]
2804
client.encrypted_secret = pgp.encrypt(client.secret,
2805
key)
2806
client_dict = {}
2807
2808
# A list of attributes that can not be pickled
2809
# + secret.
2810
exclude = { "bus", "changedstate", "secret",
2811
"checker", "server_settings" }
2812
for name, typ in inspect.getmembers(dbus.service
2813
.Object):
2814
exclude.add(name)
2815
2816
client_dict["encrypted_secret"] = (client
2817
.encrypted_secret)
2818
for attr in client.client_structure:
2819
if attr not in exclude:
2820
client_dict[attr] = getattr(client, attr)
2821
2822
clients[client.name] = client_dict
2823
del client_settings[client.name]["secret"]
2824
2825
try:
2826
with tempfile.NamedTemporaryFile(
2827
mode='wb',
2828
suffix=".pickle",
2829
prefix='clients-',
2830
dir=os.path.dirname(stored_state_path),
2831
delete=False) as stored_state:
2832
pickle.dump((clients, client_settings), stored_state)
2833
tempname = stored_state.name
2834
os.rename(tempname, stored_state_path)
2835
except (IOError, OSError) as e:
2836
if not debug:
2837
try:
2838
os.remove(tempname)
2839
except NameError:
2840
pass
2841
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
2842
logger.warning("Could not save persistent state: {}"
2843
.format(os.strerror(e.errno)))
2844
else:
2845
logger.warning("Could not save persistent state:",
2846
exc_info=e)
2847
raise
2848
2849
# Delete all clients, and settings from config
2850
while tcp_server.clients:
2851
name, client = tcp_server.clients.popitem()
2852
if use_dbus:
2853
client.remove_from_connection()
2854
# Don't signal anything except ClientRemoved
2855
client.disable(quiet=True)
2856
if use_dbus:
2857
# Emit D-Bus signal
2858
mandos_dbus_service.ClientRemoved(
2859
client.dbus_object_path, client.name)
2860
client_settings.clear()
769
global group
770
# From the Avahi example code
771
if not group is None:
772
group.Free()
773
group = None
774
# End of Avahi example code
775
776
while clients:
777
client = clients.pop()
778
client.stop_hook = None
779
client.stop()
2861
780
2862
781
atexit.register(cleanup)
2863
782
2864
for client in tcp_server.clients.itervalues():
2865
if use_dbus:
2866
# Emit D-Bus signal
2867
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2868
# Need to initiate checking of clients
2869
if client.enabled:
2870
client.init_checker()
2871
2872
tcp_server.enable()
2873
tcp_server.server_activate()
2874
783
if not debug:
784
signal.signal(signal.SIGINT, signal.SIG_IGN)
785
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
786
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
787
788
for client in clients:
789
client.start()
790
791
tcp_server = IPv6_TCPServer((server_settings["address"],
792
server_settings["port"]),
793
tcp_handler,
794
settings=server_settings,
795
clients=clients)
2875
796
# Find out what port we got
2876
if zeroconf:
2877
service.port = tcp_server.socket.getsockname()[1]
2878
if use_ipv6:
2879
logger.info("Now listening on address %r, port %d,"
2880
" flowinfo %d, scope_id %d",
2881
*tcp_server.socket.getsockname())
2882
else: # IPv4
2883
logger.info("Now listening on address %r, port %d",
2884
*tcp_server.socket.getsockname())
797
service.port = tcp_server.socket.getsockname()[1]
798
logger.debug(u"Now listening on address %r, port %d, flowinfo %d,"
799
u" scope_id %d" % tcp_server.socket.getsockname())
2885
800
2886
801
#service.interface = tcp_server.socket.getsockname()[3]
2887
802
2888
803
try:
2889
if zeroconf:
2890
# From the Avahi example code
2891
try:
2892
service.activate()
2893
except dbus.exceptions.DBusException as error:
2894
logger.critical("D-Bus Exception", exc_info=error)
2895
cleanup()
2896
sys.exit(1)
2897
# End of Avahi example code
804
# From the Avahi example code
805
server.connect_to_signal("StateChanged", server_state_changed)
806
try:
807
server_state_changed(server.GetState())
808
except dbus.exceptions.DBusException, error:
809
logger.critical(u"DBusException: %s", error)
810
sys.exit(1)
811
# End of Avahi example code
2898
812
2899
813
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2900
814
lambda *args, **kwargs:
2901
(tcp_server.handle_request
2902
(*args[2:], **kwargs) or True))
815
tcp_server.handle_request\
816
(*args[2:], **kwargs) or True)
2903
817
2904
818
logger.debug("Starting main loop")
819
main_loop_started = True
2905
820
main_loop.run()
2906
except AvahiError as error:
2907
logger.critical("Avahi Error", exc_info=error)
2908
cleanup()
821
except AvahiError, error:
822
logger.critical(u"AvahiError: %s" + unicode(error))
2909
823
sys.exit(1)
2910
824
except KeyboardInterrupt:
2911
825
if debug:
2912
print("", file=sys.stderr)
2913
logger.debug("Server received KeyboardInterrupt")
2914
logger.debug("Server exiting")
2915
# Must run before the D-Bus bus name gets deregistered
2916
cleanup()
2917
826
print
2918
827
2919
828
if __name__ == '__main__':
2920
829
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0