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- Committer: Teddy Hogeborn
- Date: 2009-02-13 05:38:21 UTC
- Revision ID: teddy@fukt.bsnet.se-20090213053821-03e696gckk4nbjps
Support not using IPv6 in server:
* mandos (AvahiService.__init__): Take new "protocol" parameter. All
callers changed.
(IPv6_TCPServer.__init__): Take new "use_ipv6" parameter. All
callers changed.
(IPv6_TCPServer.server_bind): Create IPv4 socket if not using IPv6.
(main): New "--no-ipv6" command line option. New "use_ipv6" config
option.
* mandos-options.xml ([@id="address"]): Document conditional IPv4
address support.
([@id="ipv6"]): New paragraph.
* mandos.conf (use_ipv6): New config option.
* mandos.conf.xml (OPTIONS): Document new "use_dbus" option.
(EXAMPLE): Changed to use IPv6 link-local address. Added "use_ipv6"
option.
* mandos.xml (SYNOPSIS): New "--no-ipv6" option.
(OPTIONS): Document new "--no-ipv6" option.
* mandos (AvahiService.__init__): Take new "protocol" parameter. All
callers changed.
(IPv6_TCPServer.__init__): Take new "use_ipv6" parameter. All
callers changed.
(IPv6_TCPServer.server_bind): Create IPv4 socket if not using IPv6.
(main): New "--no-ipv6" command line option. New "use_ipv6" config
option.
* mandos-options.xml ([@id="address"]): Document conditional IPv4
address support.
([@id="ipv6"]): New paragraph.
* mandos.conf (use_ipv6): New config option.
* mandos.conf.xml (OPTIONS): Document new "use_dbus" option.
(EXAMPLE): Changed to use IPv6 link-local address. Added "use_ipv6"
option.
* mandos.xml (SYNOPSIS): New "--no-ipv6" option.
(OPTIONS): Document new "--no-ipv6" option.
- files removed:
- dbus-mandos.conf
- files modified:
- INSTALL
added
removed
mandos
6
6
# This program is partly derived from an example program for an Avahi
7
7
# service publisher, downloaded from
8
8
# <http://avahi.org/wiki/PythonPublishExample>. This includes the
9
# methods "add", "remove", "server_state_changed",
10
# "entry_group_state_changed", "cleanup", and "activate" in the
11
# "AvahiService" class, and some lines in "main".
9
# methods "add" and "remove" in the "AvahiService" class, the
10
# "server_state_changed" and "entry_group_state_changed" functions,
11
# and some lines in "main".
12
12
#
13
13
# Everything else is
14
14
# Copyright © 2008,2009 Teddy Hogeborn
33
33
34
34
from __future__ import division, with_statement, absolute_import
35
35
36
import SocketServer as socketserver
36
import SocketServer
37
37
import socket
38
38
import optparse
39
39
import datetime
44
44
import gnutls.library.functions
45
45
import gnutls.library.constants
46
46
import gnutls.library.types
47
import ConfigParser as configparser
47
import ConfigParser
48
48
import sys
49
49
import re
50
50
import os
51
51
import signal
52
from sets import Set
52
53
import subprocess
53
54
import atexit
54
55
import stat
55
56
import logging
56
57
import logging.handlers
57
58
import pwd
58
import contextlib
59
import struct
60
import fcntl
61
import functools
62
import cPickle as pickle
59
from contextlib import closing
63
60
64
61
import dbus
65
62
import dbus.service
68
65
from dbus.mainloop.glib import DBusGMainLoop
69
66
import ctypes
70
67
import ctypes.util
71
import xml.dom.minidom
72
import inspect
73
74
try:
75
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
76
except AttributeError:
77
try:
78
from IN import SO_BINDTODEVICE
79
except ImportError:
80
SO_BINDTODEVICE = None
81
82
83
version = "1.0.14"
84
85
logger = logging.Logger(u'mandos')
68
69
version = "1.0.5"
70
71
logger = logging.Logger('mandos')
86
72
syslogger = (logging.handlers.SysLogHandler
87
73
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
88
74
address = "/dev/log"))
89
75
syslogger.setFormatter(logging.Formatter
90
(u'Mandos [%(process)d]: %(levelname)s:'
91
u' %(message)s'))
76
('Mandos [%(process)d]: %(levelname)s:'
77
' %(message)s'))
92
78
logger.addHandler(syslogger)
93
79
94
80
console = logging.StreamHandler()
95
console.setFormatter(logging.Formatter(u'%(name)s [%(process)d]:'
96
u' %(levelname)s:'
97
u' %(message)s'))
81
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
82
' %(levelname)s: %(message)s'))
98
83
logger.addHandler(console)
99
84
100
85
class AvahiError(Exception):
113
98
114
99
class AvahiService(object):
115
100
"""An Avahi (Zeroconf) service.
116
117
101
Attributes:
118
102
interface: integer; avahi.IF_UNSPEC or an interface index.
119
103
Used to optionally bind to the specified interface.
120
name: string; Example: u'Mandos'
121
type: string; Example: u'_mandos._tcp'.
104
name: string; Example: 'Mandos'
105
type: string; Example: '_mandos._tcp'.
122
106
See <http://www.dns-sd.org/ServiceTypes.html>
123
107
port: integer; what port to announce
124
108
TXT: list of strings; TXT record for the service
127
111
max_renames: integer; maximum number of renames
128
112
rename_count: integer; counter so we only rename after collisions
129
113
a sensible number of times
130
group: D-Bus Entry Group
131
server: D-Bus Server
132
bus: dbus.SystemBus()
133
114
"""
134
115
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
135
116
servicetype = None, port = None, TXT = None,
136
domain = u"", host = u"", max_renames = 32768,
137
protocol = avahi.PROTO_UNSPEC, bus = None):
117
domain = "", host = "", max_renames = 32768,
118
protocol = avahi.PROTO_UNSPEC):
138
119
self.interface = interface
139
120
self.name = name
140
121
self.type = servicetype
145
126
self.rename_count = 0
146
127
self.max_renames = max_renames
147
128
self.protocol = protocol
148
self.group = None # our entry group
149
self.server = None
150
self.bus = bus
151
129
def rename(self):
152
130
"""Derived from the Avahi example code"""
153
131
if self.rename_count >= self.max_renames:
155
133
u" after %i retries, exiting.",
156
134
self.rename_count)
157
135
raise AvahiServiceError(u"Too many renames")
158
self.name = self.server.GetAlternativeServiceName(self.name)
136
self.name = server.GetAlternativeServiceName(self.name)
159
137
logger.info(u"Changing Zeroconf service name to %r ...",
160
unicode(self.name))
138
str(self.name))
161
139
syslogger.setFormatter(logging.Formatter
162
(u'Mandos (%s) [%%(process)d]:'
163
u' %%(levelname)s: %%(message)s'
164
% self.name))
140
('Mandos (%s): %%(levelname)s:'
141
' %%(message)s' % self.name))
165
142
self.remove()
166
143
self.add()
167
144
self.rename_count += 1
168
145
def remove(self):
169
146
"""Derived from the Avahi example code"""
170
if self.group is not None:
171
self.group.Reset()
147
if group is not None:
148
group.Reset()
172
149
def add(self):
173
150
"""Derived from the Avahi example code"""
174
if self.group is None:
175
self.group = dbus.Interface(
176
self.bus.get_object(avahi.DBUS_NAME,
177
self.server.EntryGroupNew()),
178
avahi.DBUS_INTERFACE_ENTRY_GROUP)
179
self.group.connect_to_signal('StateChanged',
180
self
181
.entry_group_state_changed)
151
global group
152
if group is None:
153
group = dbus.Interface(bus.get_object
154
(avahi.DBUS_NAME,
155
server.EntryGroupNew()),
156
avahi.DBUS_INTERFACE_ENTRY_GROUP)
157
group.connect_to_signal('StateChanged',
158
entry_group_state_changed)
182
159
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
183
self.name, self.type)
184
self.group.AddService(
185
self.interface,
186
self.protocol,
187
dbus.UInt32(0), # flags
188
self.name, self.type,
189
self.domain, self.host,
190
dbus.UInt16(self.port),
191
avahi.string_array_to_txt_array(self.TXT))
192
self.group.Commit()
193
def entry_group_state_changed(self, state, error):
194
"""Derived from the Avahi example code"""
195
logger.debug(u"Avahi state change: %i", state)
196
197
if state == avahi.ENTRY_GROUP_ESTABLISHED:
198
logger.debug(u"Zeroconf service established.")
199
elif state == avahi.ENTRY_GROUP_COLLISION:
200
logger.warning(u"Zeroconf service name collision.")
201
self.rename()
202
elif state == avahi.ENTRY_GROUP_FAILURE:
203
logger.critical(u"Avahi: Error in group state changed %s",
204
unicode(error))
205
raise AvahiGroupError(u"State changed: %s"
206
% unicode(error))
207
def cleanup(self):
208
"""Derived from the Avahi example code"""
209
if self.group is not None:
210
self.group.Free()
211
self.group = None
212
def server_state_changed(self, state):
213
"""Derived from the Avahi example code"""
214
if state == avahi.SERVER_COLLISION:
215
logger.error(u"Zeroconf server name collision")
216
self.remove()
217
elif state == avahi.SERVER_RUNNING:
218
self.add()
219
def activate(self):
220
"""Derived from the Avahi example code"""
221
if self.server is None:
222
self.server = dbus.Interface(
223
self.bus.get_object(avahi.DBUS_NAME,
224
avahi.DBUS_PATH_SERVER),
225
avahi.DBUS_INTERFACE_SERVER)
226
self.server.connect_to_signal(u"StateChanged",
227
self.server_state_changed)
228
self.server_state_changed(self.server.GetState())
229
230
231
class Client(object):
160
service.name, service.type)
161
group.AddService(
162
self.interface, # interface
163
self.protocol, # protocol
164
dbus.UInt32(0), # flags
165
self.name, self.type,
166
self.domain, self.host,
167
dbus.UInt16(self.port),
168
avahi.string_array_to_txt_array(self.TXT))
169
group.Commit()
170
171
# From the Avahi example code:
172
group = None # our entry group
173
# End of Avahi example code
174
175
176
def _datetime_to_dbus(dt, variant_level=0):
177
"""Convert a UTC datetime.datetime() to a D-Bus type."""
178
return dbus.String(dt.isoformat(), variant_level=variant_level)
179
180
181
class Client(dbus.service.Object):
232
182
"""A representation of a client host served by this server.
233
234
183
Attributes:
235
184
name: string; from the config file, used in log messages and
236
185
D-Bus identifiers
243
192
enabled: bool()
244
193
last_checked_ok: datetime.datetime(); (UTC) or None
245
194
timeout: datetime.timedelta(); How long from last_checked_ok
246
until this client is disabled
195
until this client is invalid
247
196
interval: datetime.timedelta(); How often to start a new checker
248
197
disable_hook: If set, called by disable() as disable_hook(self)
249
198
checker: subprocess.Popen(); a running checker process used
250
199
to see if the client lives.
251
200
'None' if no process is running.
252
201
checker_initiator_tag: a gobject event source tag, or None
253
disable_initiator_tag: - '' -
202
disable_initiator_tag: - '' -
254
203
checker_callback_tag: - '' -
255
204
checker_command: string; External command which is run to check if
256
205
client lives. %() expansions are done at
257
206
runtime with vars(self) as dict, so that for
258
207
instance %(name)s can be used in the command.
259
current_checker_command: string; current running checker_command
208
use_dbus: bool(); Whether to provide D-Bus interface and signals
209
dbus_object_path: dbus.ObjectPath ; only set if self.use_dbus
260
210
"""
261
262
@staticmethod
263
def _timedelta_to_milliseconds(td):
264
"Convert a datetime.timedelta() to milliseconds"
265
return ((td.days * 24 * 60 * 60 * 1000)
266
+ (td.seconds * 1000)
267
+ (td.microseconds // 1000))
268
269
211
def timeout_milliseconds(self):
270
212
"Return the 'timeout' attribute in milliseconds"
271
return self._timedelta_to_milliseconds(self.timeout)
213
return ((self.timeout.days * 24 * 60 * 60 * 1000)
214
+ (self.timeout.seconds * 1000)
215
+ (self.timeout.microseconds // 1000))
272
216
273
217
def interval_milliseconds(self):
274
218
"Return the 'interval' attribute in milliseconds"
275
return self._timedelta_to_milliseconds(self.interval)
219
return ((self.interval.days * 24 * 60 * 60 * 1000)
220
+ (self.interval.seconds * 1000)
221
+ (self.interval.microseconds // 1000))
276
222
277
def __init__(self, name = None, disable_hook=None, config=None):
223
def __init__(self, name = None, disable_hook=None, config=None,
224
use_dbus=True):
278
225
"""Note: the 'checker' key in 'config' sets the
279
226
'checker_command' attribute and *not* the 'checker'
280
227
attribute."""
282
229
if config is None:
283
230
config = {}
284
231
logger.debug(u"Creating client %r", self.name)
232
self.use_dbus = False # During __init__
285
233
# Uppercase and remove spaces from fingerprint for later
286
234
# comparison purposes with return value from the fingerprint()
287
235
# function
288
self.fingerprint = (config[u"fingerprint"].upper()
236
self.fingerprint = (config["fingerprint"].upper()
289
237
.replace(u" ", u""))
290
238
logger.debug(u" Fingerprint: %s", self.fingerprint)
291
if u"secret" in config:
292
self.secret = config[u"secret"].decode(u"base64")
293
elif u"secfile" in config:
294
with open(os.path.expanduser(os.path.expandvars
295
(config[u"secfile"])),
296
"rb") as secfile:
239
if "secret" in config:
240
self.secret = config["secret"].decode(u"base64")
241
elif "secfile" in config:
242
with closing(open(os.path.expanduser
243
(os.path.expandvars
244
(config["secfile"])))) as secfile:
297
245
self.secret = secfile.read()
298
246
else:
299
247
raise TypeError(u"No secret or secfile for client %s"
300
248
% self.name)
301
self.host = config.get(u"host", u"")
249
self.host = config.get("host", "")
302
250
self.created = datetime.datetime.utcnow()
303
251
self.enabled = False
304
252
self.last_enabled = None
305
253
self.last_checked_ok = None
306
self.timeout = string_to_delta(config[u"timeout"])
307
self.interval = string_to_delta(config[u"interval"])
254
self.timeout = string_to_delta(config["timeout"])
255
self.interval = string_to_delta(config["interval"])
308
256
self.disable_hook = disable_hook
309
257
self.checker = None
310
258
self.checker_initiator_tag = None
311
259
self.disable_initiator_tag = None
312
260
self.checker_callback_tag = None
313
self.checker_command = config[u"checker"]
314
self.current_checker_command = None
261
self.checker_command = config["checker"]
315
262
self.last_connect = None
263
# Only now, when this client is initialized, can it show up on
264
# the D-Bus
265
self.use_dbus = use_dbus
266
if self.use_dbus:
267
self.dbus_object_path = (dbus.ObjectPath
268
("/clients/"
269
+ self.name.replace(".", "_")))
270
dbus.service.Object.__init__(self, bus,
271
self.dbus_object_path)
316
272
317
273
def enable(self):
318
274
"""Start this client's checker and timeout hooks"""
319
if getattr(self, u"enabled", False):
320
# Already enabled
321
return
322
275
self.last_enabled = datetime.datetime.utcnow()
323
276
# Schedule a new checker to be started an 'interval' from now,
324
277
# and every interval from then on.
325
278
self.checker_initiator_tag = (gobject.timeout_add
326
279
(self.interval_milliseconds(),
327
280
self.start_checker))
281
# Also start a new checker *right now*.
282
self.start_checker()
328
283
# Schedule a disable() when 'timeout' has passed
329
284
self.disable_initiator_tag = (gobject.timeout_add
330
285
(self.timeout_milliseconds(),
331
286
self.disable))
332
287
self.enabled = True
333
# Also start a new checker *right now*.
334
self.start_checker()
288
if self.use_dbus:
289
# Emit D-Bus signals
290
self.PropertyChanged(dbus.String(u"enabled"),
291
dbus.Boolean(True, variant_level=1))
292
self.PropertyChanged(dbus.String(u"last_enabled"),
293
(_datetime_to_dbus(self.last_enabled,
294
variant_level=1)))
335
295
336
def disable(self, quiet=True):
296
def disable(self):
337
297
"""Disable this client."""
338
298
if not getattr(self, "enabled", False):
339
299
return False
340
if not quiet:
341
logger.info(u"Disabling client %s", self.name)
342
if getattr(self, u"disable_initiator_tag", False):
300
logger.info(u"Disabling client %s", self.name)
301
if getattr(self, "disable_initiator_tag", False):
343
302
gobject.source_remove(self.disable_initiator_tag)
344
303
self.disable_initiator_tag = None
345
if getattr(self, u"checker_initiator_tag", False):
304
if getattr(self, "checker_initiator_tag", False):
346
305
gobject.source_remove(self.checker_initiator_tag)
347
306
self.checker_initiator_tag = None
348
307
self.stop_checker()
349
308
if self.disable_hook:
350
309
self.disable_hook(self)
351
310
self.enabled = False
311
if self.use_dbus:
312
# Emit D-Bus signal
313
self.PropertyChanged(dbus.String(u"enabled"),
314
dbus.Boolean(False, variant_level=1))
352
315
# Do not run this again if called by a gobject.timeout_add
353
316
return False
354
317
360
323
"""The checker has completed, so take appropriate actions."""
361
324
self.checker_callback_tag = None
362
325
self.checker = None
326
if self.use_dbus:
327
# Emit D-Bus signal
328
self.PropertyChanged(dbus.String(u"checker_running"),
329
dbus.Boolean(False, variant_level=1))
363
330
if os.WIFEXITED(condition):
364
331
exitstatus = os.WEXITSTATUS(condition)
365
332
if exitstatus == 0:
369
336
else:
370
337
logger.info(u"Checker for %(name)s failed",
371
338
vars(self))
339
if self.use_dbus:
340
# Emit D-Bus signal
341
self.CheckerCompleted(dbus.Int16(exitstatus),
342
dbus.Int64(condition),
343
dbus.String(command))
372
344
else:
373
345
logger.warning(u"Checker for %(name)s crashed?",
374
346
vars(self))
347
if self.use_dbus:
348
# Emit D-Bus signal
349
self.CheckerCompleted(dbus.Int16(-1),
350
dbus.Int64(condition),
351
dbus.String(command))
375
352
376
353
def checked_ok(self):
377
354
"""Bump up the timeout for this client.
378
379
355
This should only be called when the client has been seen,
380
356
alive and well.
381
357
"""
384
360
self.disable_initiator_tag = (gobject.timeout_add
385
361
(self.timeout_milliseconds(),
386
362
self.disable))
363
if self.use_dbus:
364
# Emit D-Bus signal
365
self.PropertyChanged(
366
dbus.String(u"last_checked_ok"),
367
(_datetime_to_dbus(self.last_checked_ok,
368
variant_level=1)))
387
369
388
370
def start_checker(self):
389
371
"""Start a new checker subprocess if one is not running.
390
391
372
If a checker already exists, leave it running and do
392
373
nothing."""
393
374
# The reason for not killing a running checker is that if we
396
377
# client would inevitably timeout, since no checker would get
397
378
# a chance to run to completion. If we instead leave running
398
379
# checkers alone, the checker would have to take more time
399
# than 'timeout' for the client to be disabled, which is as it
400
# should be.
401
402
# If a checker exists, make sure it is not a zombie
403
try:
404
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
405
except (AttributeError, OSError), error:
406
if (isinstance(error, OSError)
407
and error.errno != errno.ECHILD):
408
raise error
409
else:
410
if pid:
411
logger.warning(u"Checker was a zombie")
412
gobject.source_remove(self.checker_callback_tag)
413
self.checker_callback(pid, status,
414
self.current_checker_command)
415
# Start a new checker if needed
380
# than 'timeout' for the client to be declared invalid, which
381
# is as it should be.
416
382
if self.checker is None:
417
383
try:
418
384
# In case checker_command has exactly one % operator
419
385
command = self.checker_command % self.host
420
386
except TypeError:
421
387
# Escape attributes for the shell
422
escaped_attrs = dict((key,
423
re.escape(unicode(str(val),
424
errors=
425
u'replace')))
388
escaped_attrs = dict((key, re.escape(str(val)))
426
389
for key, val in
427
390
vars(self).iteritems())
428
391
try:
431
394
logger.error(u'Could not format string "%s":'
432
395
u' %s', self.checker_command, error)
433
396
return True # Try again later
434
self.current_checker_command = command
435
397
try:
436
398
logger.info(u"Starting checker %r for %s",
437
399
command, self.name)
441
403
# always replaced by /dev/null.)
442
404
self.checker = subprocess.Popen(command,
443
405
close_fds=True,
444
shell=True, cwd=u"/")
406
shell=True, cwd="/")
407
if self.use_dbus:
408
# Emit D-Bus signal
409
self.CheckerStarted(command)
410
self.PropertyChanged(
411
dbus.String("checker_running"),
412
dbus.Boolean(True, variant_level=1))
445
413
self.checker_callback_tag = (gobject.child_watch_add
446
414
(self.checker.pid,
447
415
self.checker_callback,
463
431
if self.checker_callback_tag:
464
432
gobject.source_remove(self.checker_callback_tag)
465
433
self.checker_callback_tag = None
466
if getattr(self, u"checker", None) is None:
434
if getattr(self, "checker", None) is None:
467
435
return
468
436
logger.debug(u"Stopping checker for %(name)s", vars(self))
469
437
try:
470
438
os.kill(self.checker.pid, signal.SIGTERM)
471
#time.sleep(0.5)
439
#os.sleep(0.5)
472
440
#if self.checker.poll() is None:
473
441
# os.kill(self.checker.pid, signal.SIGKILL)
474
442
except OSError, error:
475
443
if error.errno != errno.ESRCH: # No such process
476
444
raise
477
445
self.checker = None
478
479
480
def dbus_service_property(dbus_interface, signature=u"v",
481
access=u"readwrite", byte_arrays=False):
482
"""Decorators for marking methods of a DBusObjectWithProperties to
483
become properties on the D-Bus.
484
485
The decorated method will be called with no arguments by "Get"
486
and with one argument by "Set".
487
488
The parameters, where they are supported, are the same as
489
dbus.service.method, except there is only "signature", since the
490
type from Get() and the type sent to Set() is the same.
491
"""
492
# Encoding deeply encoded byte arrays is not supported yet by the
493
# "Set" method, so we fail early here:
494
if byte_arrays and signature != u"ay":
495
raise ValueError(u"Byte arrays not supported for non-'ay'"
496
u" signature %r" % signature)
497
def decorator(func):
498
func._dbus_is_property = True
499
func._dbus_interface = dbus_interface
500
func._dbus_signature = signature
501
func._dbus_access = access
502
func._dbus_name = func.__name__
503
if func._dbus_name.endswith(u"_dbus_property"):
504
func._dbus_name = func._dbus_name[:-14]
505
func._dbus_get_args_options = {u'byte_arrays': byte_arrays }
506
return func
507
return decorator
508
509
510
class DBusPropertyException(dbus.exceptions.DBusException):
511
"""A base class for D-Bus property-related exceptions
512
"""
513
def __unicode__(self):
514
return unicode(str(self))
515
516
517
class DBusPropertyAccessException(DBusPropertyException):
518
"""A property's access permissions disallows an operation.
519
"""
520
pass
521
522
523
class DBusPropertyNotFound(DBusPropertyException):
524
"""An attempt was made to access a non-existing property.
525
"""
526
pass
527
528
529
class DBusObjectWithProperties(dbus.service.Object):
530
"""A D-Bus object with properties.
531
532
Classes inheriting from this can use the dbus_service_property
533
decorator to expose methods as D-Bus properties. It exposes the
534
standard Get(), Set(), and GetAll() methods on the D-Bus.
535
"""
536
537
@staticmethod
538
def _is_dbus_property(obj):
539
return getattr(obj, u"_dbus_is_property", False)
540
541
def _get_all_dbus_properties(self):
542
"""Returns a generator of (name, attribute) pairs
543
"""
544
return ((prop._dbus_name, prop)
545
for name, prop in
546
inspect.getmembers(self, self._is_dbus_property))
547
548
def _get_dbus_property(self, interface_name, property_name):
549
"""Returns a bound method if one exists which is a D-Bus
550
property with the specified name and interface.
551
"""
552
for name in (property_name,
553
property_name + u"_dbus_property"):
554
prop = getattr(self, name, None)
555
if (prop is None
556
or not self._is_dbus_property(prop)
557
or prop._dbus_name != property_name
558
or (interface_name and prop._dbus_interface
559
and interface_name != prop._dbus_interface)):
560
continue
561
return prop
562
# No such property
563
raise DBusPropertyNotFound(self.dbus_object_path + u":"
564
+ interface_name + u"."
565
+ property_name)
566
567
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ss",
568
out_signature=u"v")
569
def Get(self, interface_name, property_name):
570
"""Standard D-Bus property Get() method, see D-Bus standard.
571
"""
572
prop = self._get_dbus_property(interface_name, property_name)
573
if prop._dbus_access == u"write":
574
raise DBusPropertyAccessException(property_name)
575
value = prop()
576
if not hasattr(value, u"variant_level"):
577
return value
578
return type(value)(value, variant_level=value.variant_level+1)
579
580
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ssv")
581
def Set(self, interface_name, property_name, value):
582
"""Standard D-Bus property Set() method, see D-Bus standard.
583
"""
584
prop = self._get_dbus_property(interface_name, property_name)
585
if prop._dbus_access == u"read":
586
raise DBusPropertyAccessException(property_name)
587
if prop._dbus_get_args_options[u"byte_arrays"]:
588
# The byte_arrays option is not supported yet on
589
# signatures other than "ay".
590
if prop._dbus_signature != u"ay":
591
raise ValueError
592
value = dbus.ByteArray(''.join(unichr(byte)
593
for byte in value))
594
prop(value)
595
596
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"s",
597
out_signature=u"a{sv}")
598
def GetAll(self, interface_name):
599
"""Standard D-Bus property GetAll() method, see D-Bus
600
standard.
601
602
Note: Will not include properties with access="write".
603
"""
604
all = {}
605
for name, prop in self._get_all_dbus_properties():
606
if (interface_name
607
and interface_name != prop._dbus_interface):
608
# Interface non-empty but did not match
609
continue
610
# Ignore write-only properties
611
if prop._dbus_access == u"write":
612
continue
613
value = prop()
614
if not hasattr(value, u"variant_level"):
615
all[name] = value
616
continue
617
all[name] = type(value)(value, variant_level=
618
value.variant_level+1)
619
return dbus.Dictionary(all, signature=u"sv")
620
621
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
622
out_signature=u"s",
623
path_keyword='object_path',
624
connection_keyword='connection')
625
def Introspect(self, object_path, connection):
626
"""Standard D-Bus method, overloaded to insert property tags.
627
"""
628
xmlstring = dbus.service.Object.Introspect(self, object_path,
629
connection)
630
try:
631
document = xml.dom.minidom.parseString(xmlstring)
632
def make_tag(document, name, prop):
633
e = document.createElement(u"property")
634
e.setAttribute(u"name", name)
635
e.setAttribute(u"type", prop._dbus_signature)
636
e.setAttribute(u"access", prop._dbus_access)
637
return e
638
for if_tag in document.getElementsByTagName(u"interface"):
639
for tag in (make_tag(document, name, prop)
640
for name, prop
641
in self._get_all_dbus_properties()
642
if prop._dbus_interface
643
== if_tag.getAttribute(u"name")):
644
if_tag.appendChild(tag)
645
# Add the names to the return values for the
646
# "org.freedesktop.DBus.Properties" methods
647
if (if_tag.getAttribute(u"name")
648
== u"org.freedesktop.DBus.Properties"):
649
for cn in if_tag.getElementsByTagName(u"method"):
650
if cn.getAttribute(u"name") == u"Get":
651
for arg in cn.getElementsByTagName(u"arg"):
652
if (arg.getAttribute(u"direction")
653
== u"out"):
654
arg.setAttribute(u"name", u"value")
655
elif cn.getAttribute(u"name") == u"GetAll":
656
for arg in cn.getElementsByTagName(u"arg"):
657
if (arg.getAttribute(u"direction")
658
== u"out"):
659
arg.setAttribute(u"name", u"props")
660
xmlstring = document.toxml(u"utf-8")
661
document.unlink()
662
except (AttributeError, xml.dom.DOMException,
663
xml.parsers.expat.ExpatError), error:
664
logger.error(u"Failed to override Introspection method",
665
error)
666
return xmlstring
667
668
669
class ClientDBus(Client, DBusObjectWithProperties):
670
"""A Client class using D-Bus
671
672
Attributes:
673
dbus_object_path: dbus.ObjectPath
674
bus: dbus.SystemBus()
675
"""
676
# dbus.service.Object doesn't use super(), so we can't either.
677
678
def __init__(self, bus = None, *args, **kwargs):
679
self.bus = bus
680
Client.__init__(self, *args, **kwargs)
681
# Only now, when this client is initialized, can it show up on
682
# the D-Bus
683
self.dbus_object_path = (dbus.ObjectPath
684
(u"/clients/"
685
+ self.name.replace(u".", u"_")))
686
DBusObjectWithProperties.__init__(self, self.bus,
687
self.dbus_object_path)
688
689
@staticmethod
690
def _datetime_to_dbus(dt, variant_level=0):
691
"""Convert a UTC datetime.datetime() to a D-Bus type."""
692
return dbus.String(dt.isoformat(),
693
variant_level=variant_level)
694
695
def enable(self):
696
oldstate = getattr(self, u"enabled", False)
697
r = Client.enable(self)
698
if oldstate != self.enabled:
699
# Emit D-Bus signals
700
self.PropertyChanged(dbus.String(u"enabled"),
701
dbus.Boolean(True, variant_level=1))
702
self.PropertyChanged(
703
dbus.String(u"last_enabled"),
704
self._datetime_to_dbus(self.last_enabled,
705
variant_level=1))
706
return r
707
708
def disable(self, quiet = False):
709
oldstate = getattr(self, u"enabled", False)
710
r = Client.disable(self, quiet=quiet)
711
if not quiet and oldstate != self.enabled:
712
# Emit D-Bus signal
713
self.PropertyChanged(dbus.String(u"enabled"),
714
dbus.Boolean(False, variant_level=1))
715
return r
716
717
def __del__(self, *args, **kwargs):
718
try:
719
self.remove_from_connection()
720
except LookupError:
721
pass
722
if hasattr(DBusObjectWithProperties, u"__del__"):
723
DBusObjectWithProperties.__del__(self, *args, **kwargs)
724
Client.__del__(self, *args, **kwargs)
725
726
def checker_callback(self, pid, condition, command,
727
*args, **kwargs):
728
self.checker_callback_tag = None
729
self.checker = None
730
# Emit D-Bus signal
731
self.PropertyChanged(dbus.String(u"checker_running"),
732
dbus.Boolean(False, variant_level=1))
733
if os.WIFEXITED(condition):
734
exitstatus = os.WEXITSTATUS(condition)
735
# Emit D-Bus signal
736
self.CheckerCompleted(dbus.Int16(exitstatus),
737
dbus.Int64(condition),
738
dbus.String(command))
739
else:
740
# Emit D-Bus signal
741
self.CheckerCompleted(dbus.Int16(-1),
742
dbus.Int64(condition),
743
dbus.String(command))
744
745
return Client.checker_callback(self, pid, condition, command,
746
*args, **kwargs)
747
748
def checked_ok(self, *args, **kwargs):
749
r = Client.checked_ok(self, *args, **kwargs)
750
# Emit D-Bus signal
751
self.PropertyChanged(
752
dbus.String(u"last_checked_ok"),
753
(self._datetime_to_dbus(self.last_checked_ok,
754
variant_level=1)))
755
return r
756
757
def start_checker(self, *args, **kwargs):
758
old_checker = self.checker
759
if self.checker is not None:
760
old_checker_pid = self.checker.pid
761
else:
762
old_checker_pid = None
763
r = Client.start_checker(self, *args, **kwargs)
764
# Only if new checker process was started
765
if (self.checker is not None
766
and old_checker_pid != self.checker.pid):
767
# Emit D-Bus signal
768
self.CheckerStarted(self.current_checker_command)
769
self.PropertyChanged(
770
dbus.String(u"checker_running"),
771
dbus.Boolean(True, variant_level=1))
772
return r
773
774
def stop_checker(self, *args, **kwargs):
775
old_checker = getattr(self, u"checker", None)
776
r = Client.stop_checker(self, *args, **kwargs)
777
if (old_checker is not None
778
and getattr(self, u"checker", None) is None):
446
if self.use_dbus:
779
447
self.PropertyChanged(dbus.String(u"checker_running"),
780
448
dbus.Boolean(False, variant_level=1))
781
return r
449
450
def still_valid(self):
451
"""Has the timeout not yet passed for this client?"""
452
if not getattr(self, "enabled", False):
453
return False
454
now = datetime.datetime.utcnow()
455
if self.last_checked_ok is None:
456
return now < (self.created + self.timeout)
457
else:
458
return now < (self.last_checked_ok + self.timeout)
782
459
783
460
## D-Bus methods & signals
784
461
_interface = u"se.bsnet.fukt.Mandos.Client"
785
462
786
463
# CheckedOK - method
787
@dbus.service.method(_interface)
788
def CheckedOK(self):
789
return self.checked_ok()
464
CheckedOK = dbus.service.method(_interface)(checked_ok)
465
CheckedOK.__name__ = "CheckedOK"
790
466
791
467
# CheckerCompleted - signal
792
@dbus.service.signal(_interface, signature=u"nxs")
468
@dbus.service.signal(_interface, signature="nxs")
793
469
def CheckerCompleted(self, exitcode, waitstatus, command):
794
470
"D-Bus signal"
795
471
pass
796
472
797
473
# CheckerStarted - signal
798
@dbus.service.signal(_interface, signature=u"s")
474
@dbus.service.signal(_interface, signature="s")
799
475
def CheckerStarted(self, command):
800
476
"D-Bus signal"
801
477
pass
802
478
479
# GetAllProperties - method
480
@dbus.service.method(_interface, out_signature="a{sv}")
481
def GetAllProperties(self):
482
"D-Bus method"
483
return dbus.Dictionary({
484
dbus.String("name"):
485
dbus.String(self.name, variant_level=1),
486
dbus.String("fingerprint"):
487
dbus.String(self.fingerprint, variant_level=1),
488
dbus.String("host"):
489
dbus.String(self.host, variant_level=1),
490
dbus.String("created"):
491
_datetime_to_dbus(self.created, variant_level=1),
492
dbus.String("last_enabled"):
493
(_datetime_to_dbus(self.last_enabled,
494
variant_level=1)
495
if self.last_enabled is not None
496
else dbus.Boolean(False, variant_level=1)),
497
dbus.String("enabled"):
498
dbus.Boolean(self.enabled, variant_level=1),
499
dbus.String("last_checked_ok"):
500
(_datetime_to_dbus(self.last_checked_ok,
501
variant_level=1)
502
if self.last_checked_ok is not None
503
else dbus.Boolean (False, variant_level=1)),
504
dbus.String("timeout"):
505
dbus.UInt64(self.timeout_milliseconds(),
506
variant_level=1),
507
dbus.String("interval"):
508
dbus.UInt64(self.interval_milliseconds(),
509
variant_level=1),
510
dbus.String("checker"):
511
dbus.String(self.checker_command,
512
variant_level=1),
513
dbus.String("checker_running"):
514
dbus.Boolean(self.checker is not None,
515
variant_level=1),
516
dbus.String("object_path"):
517
dbus.ObjectPath(self.dbus_object_path,
518
variant_level=1)
519
}, signature="sv")
520
521
# IsStillValid - method
522
IsStillValid = (dbus.service.method(_interface, out_signature="b")
523
(still_valid))
524
IsStillValid.__name__ = "IsStillValid"
525
803
526
# PropertyChanged - signal
804
@dbus.service.signal(_interface, signature=u"sv")
527
@dbus.service.signal(_interface, signature="sv")
805
528
def PropertyChanged(self, property, value):
806
529
"D-Bus signal"
807
530
pass
808
531
809
# GotSecret - signal
810
@dbus.service.signal(_interface)
811
def GotSecret(self):
812
"D-Bus signal"
813
pass
814
815
# Rejected - signal
816
@dbus.service.signal(_interface)
817
def Rejected(self):
818
"D-Bus signal"
819
pass
532
# SetChecker - method
533
@dbus.service.method(_interface, in_signature="s")
534
def SetChecker(self, checker):
535
"D-Bus setter method"
536
self.checker_command = checker
537
# Emit D-Bus signal
538
self.PropertyChanged(dbus.String(u"checker"),
539
dbus.String(self.checker_command,
540
variant_level=1))
541
542
# SetHost - method
543
@dbus.service.method(_interface, in_signature="s")
544
def SetHost(self, host):
545
"D-Bus setter method"
546
self.host = host
547
# Emit D-Bus signal
548
self.PropertyChanged(dbus.String(u"host"),
549
dbus.String(self.host, variant_level=1))
550
551
# SetInterval - method
552
@dbus.service.method(_interface, in_signature="t")
553
def SetInterval(self, milliseconds):
554
self.interval = datetime.timedelta(0, 0, 0, milliseconds)
555
# Emit D-Bus signal
556
self.PropertyChanged(dbus.String(u"interval"),
557
(dbus.UInt64(self.interval_milliseconds(),
558
variant_level=1)))
559
560
# SetSecret - method
561
@dbus.service.method(_interface, in_signature="ay",
562
byte_arrays=True)
563
def SetSecret(self, secret):
564
"D-Bus setter method"
565
self.secret = str(secret)
566
567
# SetTimeout - method
568
@dbus.service.method(_interface, in_signature="t")
569
def SetTimeout(self, milliseconds):
570
self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
571
# Emit D-Bus signal
572
self.PropertyChanged(dbus.String(u"timeout"),
573
(dbus.UInt64(self.timeout_milliseconds(),
574
variant_level=1)))
820
575
821
576
# Enable - method
822
@dbus.service.method(_interface)
823
def Enable(self):
824
"D-Bus method"
825
self.enable()
577
Enable = dbus.service.method(_interface)(enable)
578
Enable.__name__ = "Enable"
826
579
827
580
# StartChecker - method
828
581
@dbus.service.method(_interface)
837
590
self.disable()
838
591
839
592
# StopChecker - method
840
@dbus.service.method(_interface)
841
def StopChecker(self):
842
self.stop_checker()
843
844
# name - property
845
@dbus_service_property(_interface, signature=u"s", access=u"read")
846
def name_dbus_property(self):
847
return dbus.String(self.name)
848
849
# fingerprint - property
850
@dbus_service_property(_interface, signature=u"s", access=u"read")
851
def fingerprint_dbus_property(self):
852
return dbus.String(self.fingerprint)
853
854
# host - property
855
@dbus_service_property(_interface, signature=u"s",
856
access=u"readwrite")
857
def host_dbus_property(self, value=None):
858
if value is None: # get
859
return dbus.String(self.host)
860
self.host = value
861
# Emit D-Bus signal
862
self.PropertyChanged(dbus.String(u"host"),
863
dbus.String(value, variant_level=1))
864
865
# created - property
866
@dbus_service_property(_interface, signature=u"s", access=u"read")
867
def created_dbus_property(self):
868
return dbus.String(self._datetime_to_dbus(self.created))
869
870
# last_enabled - property
871
@dbus_service_property(_interface, signature=u"s", access=u"read")
872
def last_enabled_dbus_property(self):
873
if self.last_enabled is None:
874
return dbus.String(u"")
875
return dbus.String(self._datetime_to_dbus(self.last_enabled))
876
877
# enabled - property
878
@dbus_service_property(_interface, signature=u"b",
879
access=u"readwrite")
880
def enabled_dbus_property(self, value=None):
881
if value is None: # get
882
return dbus.Boolean(self.enabled)
883
if value:
884
self.enable()
885
else:
886
self.disable()
887
888
# last_checked_ok - property
889
@dbus_service_property(_interface, signature=u"s",
890
access=u"readwrite")
891
def last_checked_ok_dbus_property(self, value=None):
892
if value is not None:
893
self.checked_ok()
894
return
895
if self.last_checked_ok is None:
896
return dbus.String(u"")
897
return dbus.String(self._datetime_to_dbus(self
898
.last_checked_ok))
899
900
# timeout - property
901
@dbus_service_property(_interface, signature=u"t",
902
access=u"readwrite")
903
def timeout_dbus_property(self, value=None):
904
if value is None: # get
905
return dbus.UInt64(self.timeout_milliseconds())
906
self.timeout = datetime.timedelta(0, 0, 0, value)
907
# Emit D-Bus signal
908
self.PropertyChanged(dbus.String(u"timeout"),
909
dbus.UInt64(value, variant_level=1))
910
if getattr(self, u"disable_initiator_tag", None) is None:
911
return
912
# Reschedule timeout
913
gobject.source_remove(self.disable_initiator_tag)
914
self.disable_initiator_tag = None
915
time_to_die = (self.
916
_timedelta_to_milliseconds((self
917
.last_checked_ok
918
+ self.timeout)
919
- datetime.datetime
920
.utcnow()))
921
if time_to_die <= 0:
922
# The timeout has passed
923
self.disable()
924
else:
925
self.disable_initiator_tag = (gobject.timeout_add
926
(time_to_die, self.disable))
927
928
# interval - property
929
@dbus_service_property(_interface, signature=u"t",
930
access=u"readwrite")
931
def interval_dbus_property(self, value=None):
932
if value is None: # get
933
return dbus.UInt64(self.interval_milliseconds())
934
self.interval = datetime.timedelta(0, 0, 0, value)
935
# Emit D-Bus signal
936
self.PropertyChanged(dbus.String(u"interval"),
937
dbus.UInt64(value, variant_level=1))
938
if getattr(self, u"checker_initiator_tag", None) is None:
939
return
940
# Reschedule checker run
941
gobject.source_remove(self.checker_initiator_tag)
942
self.checker_initiator_tag = (gobject.timeout_add
943
(value, self.start_checker))
944
self.start_checker() # Start one now, too
945
946
# checker - property
947
@dbus_service_property(_interface, signature=u"s",
948
access=u"readwrite")
949
def checker_dbus_property(self, value=None):
950
if value is None: # get
951
return dbus.String(self.checker_command)
952
self.checker_command = value
953
# Emit D-Bus signal
954
self.PropertyChanged(dbus.String(u"checker"),
955
dbus.String(self.checker_command,
956
variant_level=1))
957
958
# checker_running - property
959
@dbus_service_property(_interface, signature=u"b",
960
access=u"readwrite")
961
def checker_running_dbus_property(self, value=None):
962
if value is None: # get
963
return dbus.Boolean(self.checker is not None)
964
if value:
965
self.start_checker()
966
else:
967
self.stop_checker()
968
969
# object_path - property
970
@dbus_service_property(_interface, signature=u"o", access=u"read")
971
def object_path_dbus_property(self):
972
return self.dbus_object_path # is already a dbus.ObjectPath
973
974
# secret = property
975
@dbus_service_property(_interface, signature=u"ay",
976
access=u"write", byte_arrays=True)
977
def secret_dbus_property(self, value):
978
self.secret = str(value)
593
StopChecker = dbus.service.method(_interface)(stop_checker)
594
StopChecker.__name__ = "StopChecker"
979
595
980
596
del _interface
981
597
982
598
983
class ClientHandler(socketserver.BaseRequestHandler, object):
984
"""A class to handle client connections.
985
986
Instantiated once for each connection to handle it.
599
def peer_certificate(session):
600
"Return the peer's OpenPGP certificate as a bytestring"
601
# If not an OpenPGP certificate...
602
if (gnutls.library.functions
603
.gnutls_certificate_type_get(session._c_object)
604
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
605
# ...do the normal thing
606
return session.peer_certificate
607
list_size = ctypes.c_uint(1)
608
cert_list = (gnutls.library.functions
609
.gnutls_certificate_get_peers
610
(session._c_object, ctypes.byref(list_size)))
611
if not bool(cert_list) and list_size.value != 0:
612
raise gnutls.errors.GNUTLSError("error getting peer"
613
" certificate")
614
if list_size.value == 0:
615
return None
616
cert = cert_list[0]
617
return ctypes.string_at(cert.data, cert.size)
618
619
620
def fingerprint(openpgp):
621
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
622
# New GnuTLS "datum" with the OpenPGP public key
623
datum = (gnutls.library.types
624
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
625
ctypes.POINTER
626
(ctypes.c_ubyte)),
627
ctypes.c_uint(len(openpgp))))
628
# New empty GnuTLS certificate
629
crt = gnutls.library.types.gnutls_openpgp_crt_t()
630
(gnutls.library.functions
631
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
632
# Import the OpenPGP public key into the certificate
633
(gnutls.library.functions
634
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
635
gnutls.library.constants
636
.GNUTLS_OPENPGP_FMT_RAW))
637
# Verify the self signature in the key
638
crtverify = ctypes.c_uint()
639
(gnutls.library.functions
640
.gnutls_openpgp_crt_verify_self(crt, 0, ctypes.byref(crtverify)))
641
if crtverify.value != 0:
642
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
643
raise gnutls.errors.CertificateSecurityError("Verify failed")
644
# New buffer for the fingerprint
645
buf = ctypes.create_string_buffer(20)
646
buf_len = ctypes.c_size_t()
647
# Get the fingerprint from the certificate into the buffer
648
(gnutls.library.functions
649
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
650
ctypes.byref(buf_len)))
651
# Deinit the certificate
652
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
653
# Convert the buffer to a Python bytestring
654
fpr = ctypes.string_at(buf, buf_len.value)
655
# Convert the bytestring to hexadecimal notation
656
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
657
return hex_fpr
658
659
660
class TCP_handler(SocketServer.BaseRequestHandler, object):
661
"""A TCP request handler class.
662
Instantiated by IPv6_TCPServer for each request to handle it.
987
663
Note: This will run in its own forked process."""
988
664
989
665
def handle(self):
990
666
logger.info(u"TCP connection from: %s",
991
667
unicode(self.client_address))
992
logger.debug(u"IPC Pipe FD: %d", self.server.child_pipe[1])
993
# Open IPC pipe to parent process
994
with contextlib.nested(os.fdopen(self.server.child_pipe[1],
995
u"w", 1),
996
os.fdopen(self.server.parent_pipe[0],
997
u"r", 0)) as (ipc,
998
ipc_return):
999
session = (gnutls.connection
1000
.ClientSession(self.request,
1001
gnutls.connection
1002
.X509Credentials()))
1003
1004
line = self.request.makefile().readline()
1005
logger.debug(u"Protocol version: %r", line)
1006
try:
1007
if int(line.strip().split()[0]) > 1:
1008
raise RuntimeError
1009
except (ValueError, IndexError, RuntimeError), error:
1010
logger.error(u"Unknown protocol version: %s", error)
1011
return
1012
1013
# Note: gnutls.connection.X509Credentials is really a
1014
# generic GnuTLS certificate credentials object so long as
1015
# no X.509 keys are added to it. Therefore, we can use it
1016
# here despite using OpenPGP certificates.
1017
1018
#priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
1019
# u"+AES-256-CBC", u"+SHA1",
1020
# u"+COMP-NULL", u"+CTYPE-OPENPGP",
1021
# u"+DHE-DSS"))
1022
# Use a fallback default, since this MUST be set.
1023
priority = self.server.gnutls_priority
1024
if priority is None:
1025
priority = u"NORMAL"
1026
(gnutls.library.functions
1027
.gnutls_priority_set_direct(session._c_object,
1028
priority, None))
1029
1030
try:
1031
session.handshake()
1032
except gnutls.errors.GNUTLSError, error:
1033
logger.warning(u"Handshake failed: %s", error)
1034
# Do not run session.bye() here: the session is not
1035
# established. Just abandon the request.
1036
return
1037
logger.debug(u"Handshake succeeded")
1038
try:
1039
try:
1040
fpr = self.fingerprint(self.peer_certificate
1041
(session))
1042
except (TypeError, gnutls.errors.GNUTLSError), error:
1043
logger.warning(u"Bad certificate: %s", error)
1044
return
1045
logger.debug(u"Fingerprint: %s", fpr)
1046
1047
for c in self.server.clients:
1048
if c.fingerprint == fpr:
1049
client = c
1050
break
1051
else:
1052
ipc.write(u"NOTFOUND %s %s\n"
1053
% (fpr, unicode(self.client_address)))
1054
return
1055
# Have to check if client.enabled, since it is
1056
# possible that the client was disabled since the
1057
# GnuTLS session was established.
1058
ipc.write(u"GETATTR enabled %s\n" % fpr)
1059
enabled = pickle.load(ipc_return)
1060
if not enabled:
1061
ipc.write(u"DISABLED %s\n" % client.name)
1062
return
1063
ipc.write(u"SENDING %s\n" % client.name)
1064
sent_size = 0
1065
while sent_size < len(client.secret):
1066
sent = session.send(client.secret[sent_size:])
1067
logger.debug(u"Sent: %d, remaining: %d",
1068
sent, len(client.secret)
1069
- (sent_size + sent))
1070
sent_size += sent
1071
finally:
1072
session.bye()
1073
1074
@staticmethod
1075
def peer_certificate(session):
1076
"Return the peer's OpenPGP certificate as a bytestring"
1077
# If not an OpenPGP certificate...
1078
if (gnutls.library.functions
1079
.gnutls_certificate_type_get(session._c_object)
1080
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1081
# ...do the normal thing
1082
return session.peer_certificate
1083
list_size = ctypes.c_uint(1)
1084
cert_list = (gnutls.library.functions
1085
.gnutls_certificate_get_peers
1086
(session._c_object, ctypes.byref(list_size)))
1087
if not bool(cert_list) and list_size.value != 0:
1088
raise gnutls.errors.GNUTLSError(u"error getting peer"
1089
u" certificate")
1090
if list_size.value == 0:
1091
return None
1092
cert = cert_list[0]
1093
return ctypes.string_at(cert.data, cert.size)
1094
1095
@staticmethod
1096
def fingerprint(openpgp):
1097
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1098
# New GnuTLS "datum" with the OpenPGP public key
1099
datum = (gnutls.library.types
1100
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1101
ctypes.POINTER
1102
(ctypes.c_ubyte)),
1103
ctypes.c_uint(len(openpgp))))
1104
# New empty GnuTLS certificate
1105
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1106
(gnutls.library.functions
1107
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1108
# Import the OpenPGP public key into the certificate
1109
(gnutls.library.functions
1110
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1111
gnutls.library.constants
1112
.GNUTLS_OPENPGP_FMT_RAW))
1113
# Verify the self signature in the key
1114
crtverify = ctypes.c_uint()
1115
(gnutls.library.functions
1116
.gnutls_openpgp_crt_verify_self(crt, 0,
1117
ctypes.byref(crtverify)))
1118
if crtverify.value != 0:
1119
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1120
raise (gnutls.errors.CertificateSecurityError
1121
(u"Verify failed"))
1122
# New buffer for the fingerprint
1123
buf = ctypes.create_string_buffer(20)
1124
buf_len = ctypes.c_size_t()
1125
# Get the fingerprint from the certificate into the buffer
1126
(gnutls.library.functions
1127
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1128
ctypes.byref(buf_len)))
1129
# Deinit the certificate
1130
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1131
# Convert the buffer to a Python bytestring
1132
fpr = ctypes.string_at(buf, buf_len.value)
1133
# Convert the bytestring to hexadecimal notation
1134
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
1135
return hex_fpr
1136
1137
1138
class ForkingMixInWithPipes(socketserver.ForkingMixIn, object):
1139
"""Like socketserver.ForkingMixIn, but also pass a pipe pair."""
1140
def process_request(self, request, client_address):
1141
"""Overrides and wraps the original process_request().
1142
1143
This function creates a new pipe in self.pipe
1144
"""
1145
self.child_pipe = os.pipe() # Child writes here
1146
self.parent_pipe = os.pipe() # Parent writes here
1147
super(ForkingMixInWithPipes,
1148
self).process_request(request, client_address)
1149
# Close unused ends for parent
1150
os.close(self.parent_pipe[0]) # close read end
1151
os.close(self.child_pipe[1]) # close write end
1152
self.add_pipe_fds(self.child_pipe[0], self.parent_pipe[1])
1153
def add_pipe_fds(self, child_pipe_fd, parent_pipe_fd):
1154
"""Dummy function; override as necessary"""
1155
os.close(child_pipe_fd)
1156
os.close(parent_pipe_fd)
1157
1158
1159
class IPv6_TCPServer(ForkingMixInWithPipes,
1160
socketserver.TCPServer, object):
1161
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1162
668
session = (gnutls.connection
669
.ClientSession(self.request,
670
gnutls.connection
671
.X509Credentials()))
672
673
line = self.request.makefile().readline()
674
logger.debug(u"Protocol version: %r", line)
675
try:
676
if int(line.strip().split()[0]) > 1:
677
raise RuntimeError
678
except (ValueError, IndexError, RuntimeError), error:
679
logger.error(u"Unknown protocol version: %s", error)
680
return
681
682
# Note: gnutls.connection.X509Credentials is really a generic
683
# GnuTLS certificate credentials object so long as no X.509
684
# keys are added to it. Therefore, we can use it here despite
685
# using OpenPGP certificates.
686
687
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
688
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
689
# "+DHE-DSS"))
690
# Use a fallback default, since this MUST be set.
691
priority = self.server.settings.get("priority", "NORMAL")
692
(gnutls.library.functions
693
.gnutls_priority_set_direct(session._c_object,
694
priority, None))
695
696
try:
697
session.handshake()
698
except gnutls.errors.GNUTLSError, error:
699
logger.warning(u"Handshake failed: %s", error)
700
# Do not run session.bye() here: the session is not
701
# established. Just abandon the request.
702
return
703
logger.debug(u"Handshake succeeded")
704
try:
705
fpr = fingerprint(peer_certificate(session))
706
except (TypeError, gnutls.errors.GNUTLSError), error:
707
logger.warning(u"Bad certificate: %s", error)
708
session.bye()
709
return
710
logger.debug(u"Fingerprint: %s", fpr)
711
712
for c in self.server.clients:
713
if c.fingerprint == fpr:
714
client = c
715
break
716
else:
717
logger.warning(u"Client not found for fingerprint: %s",
718
fpr)
719
session.bye()
720
return
721
# Have to check if client.still_valid(), since it is possible
722
# that the client timed out while establishing the GnuTLS
723
# session.
724
if not client.still_valid():
725
logger.warning(u"Client %(name)s is invalid",
726
vars(client))
727
session.bye()
728
return
729
## This won't work here, since we're in a fork.
730
# client.checked_ok()
731
sent_size = 0
732
while sent_size < len(client.secret):
733
sent = session.send(client.secret[sent_size:])
734
logger.debug(u"Sent: %d, remaining: %d",
735
sent, len(client.secret)
736
- (sent_size + sent))
737
sent_size += sent
738
session.bye()
739
740
741
class IPv6_TCPServer(SocketServer.ForkingMixIn,
742
SocketServer.TCPServer, object):
743
"""IPv6-capable TCP server. Accepts 'None' as address and/or port.
1163
744
Attributes:
745
settings: Server settings
746
clients: Set() of Client objects
1164
747
enabled: Boolean; whether this server is activated yet
1165
interface: None or a network interface name (string)
1166
use_ipv6: Boolean; to use IPv6 or not
1167
748
"""
1168
def __init__(self, server_address, RequestHandlerClass,
1169
interface=None, use_ipv6=True):
1170
self.interface = interface
1171
if use_ipv6:
1172
self.address_family = socket.AF_INET6
1173
socketserver.TCPServer.__init__(self, server_address,
1174
RequestHandlerClass)
749
address_family = socket.AF_INET6
750
def __init__(self, *args, **kwargs):
751
if "settings" in kwargs:
752
self.settings = kwargs["settings"]
753
del kwargs["settings"]
754
if "clients" in kwargs:
755
self.clients = kwargs["clients"]
756
del kwargs["clients"]
757
if "use_ipv6" in kwargs:
758
if not kwargs["use_ipv6"]:
759
self.address_family = socket.AF_INET
760
del kwargs["use_ipv6"]
761
self.enabled = False
762
super(IPv6_TCPServer, self).__init__(*args, **kwargs)
1175
763
def server_bind(self):
1176
764
"""This overrides the normal server_bind() function
1177
765
to bind to an interface if one was specified, and also NOT to
1178
766
bind to an address or port if they were not specified."""
1179
if self.interface is not None:
1180
if SO_BINDTODEVICE is None:
1181
logger.error(u"SO_BINDTODEVICE does not exist;"
1182
u" cannot bind to interface %s",
1183
self.interface)
1184
else:
1185
try:
1186
self.socket.setsockopt(socket.SOL_SOCKET,
1187
SO_BINDTODEVICE,
1188
str(self.interface
1189
+ u'\0'))
1190
except socket.error, error:
1191
if error[0] == errno.EPERM:
1192
logger.error(u"No permission to"
1193
u" bind to interface %s",
1194
self.interface)
1195
elif error[0] == errno.ENOPROTOOPT:
1196
logger.error(u"SO_BINDTODEVICE not available;"
1197
u" cannot bind to interface %s",
1198
self.interface)
1199
else:
1200
raise
767
if self.settings["interface"]:
768
# 25 is from /usr/include/asm-i486/socket.h
769
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
770
try:
771
self.socket.setsockopt(socket.SOL_SOCKET,
772
SO_BINDTODEVICE,
773
self.settings["interface"])
774
except socket.error, error:
775
if error[0] == errno.EPERM:
776
logger.error(u"No permission to"
777
u" bind to interface %s",
778
self.settings["interface"])
779
else:
780
raise
1201
781
# Only bind(2) the socket if we really need to.
1202
782
if self.server_address[0] or self.server_address[1]:
1203
783
if not self.server_address[0]:
1204
784
if self.address_family == socket.AF_INET6:
1205
any_address = u"::" # in6addr_any
785
any_address = "::" # in6addr_any
1206
786
else:
1207
787
any_address = socket.INADDR_ANY
1208
788
self.server_address = (any_address,
1210
790
elif not self.server_address[1]:
1211
791
self.server_address = (self.server_address[0],
1212
792
0)
1213
# if self.interface:
793
# if self.settings["interface"]:
1214
794
# self.server_address = (self.server_address[0],
1215
795
# 0, # port
1216
796
# 0, # flowinfo
1217
797
# if_nametoindex
1218
# (self.interface))
1219
return socketserver.TCPServer.server_bind(self)
1220
1221
1222
class MandosServer(IPv6_TCPServer):
1223
"""Mandos server.
1224
1225
Attributes:
1226
clients: set of Client objects
1227
gnutls_priority GnuTLS priority string
1228
use_dbus: Boolean; to emit D-Bus signals or not
1229
1230
Assumes a gobject.MainLoop event loop.
1231
"""
1232
def __init__(self, server_address, RequestHandlerClass,
1233
interface=None, use_ipv6=True, clients=None,
1234
gnutls_priority=None, use_dbus=True):
1235
self.enabled = False
1236
self.clients = clients
1237
if self.clients is None:
1238
self.clients = set()
1239
self.use_dbus = use_dbus
1240
self.gnutls_priority = gnutls_priority
1241
IPv6_TCPServer.__init__(self, server_address,
1242
RequestHandlerClass,
1243
interface = interface,
1244
use_ipv6 = use_ipv6)
798
# (self.settings
799
# ["interface"]))
800
return super(IPv6_TCPServer, self).server_bind()
1245
801
def server_activate(self):
1246
802
if self.enabled:
1247
return socketserver.TCPServer.server_activate(self)
803
return super(IPv6_TCPServer, self).server_activate()
1248
804
def enable(self):
1249
805
self.enabled = True
1250
def add_pipe_fds(self, child_pipe_fd, parent_pipe_fd):
1251
# Call "handle_ipc" for both data and EOF events
1252
gobject.io_add_watch(child_pipe_fd,
1253
gobject.IO_IN | gobject.IO_HUP,
1254
functools.partial(self.handle_ipc,
1255
reply_fd
1256
=parent_pipe_fd))
1257
def handle_ipc(self, source, condition, reply_fd=None,
1258
file_objects={}):
1259
condition_names = {
1260
gobject.IO_IN: u"IN", # There is data to read.
1261
gobject.IO_OUT: u"OUT", # Data can be written (without
1262
# blocking).
1263
gobject.IO_PRI: u"PRI", # There is urgent data to read.
1264
gobject.IO_ERR: u"ERR", # Error condition.
1265
gobject.IO_HUP: u"HUP" # Hung up (the connection has been
1266
# broken, usually for pipes and
1267
# sockets).
1268
}
1269
conditions_string = ' | '.join(name
1270
for cond, name in
1271
condition_names.iteritems()
1272
if cond & condition)
1273
logger.debug(u"Handling IPC: FD = %d, condition = %s", source,
1274
conditions_string)
1275
1276
# Turn the pipe file descriptors into Python file objects
1277
if source not in file_objects:
1278
file_objects[source] = os.fdopen(source, u"r", 1)
1279
if reply_fd not in file_objects:
1280
file_objects[reply_fd] = os.fdopen(reply_fd, u"w", 0)
1281
1282
# Read a line from the file object
1283
cmdline = file_objects[source].readline()
1284
if not cmdline: # Empty line means end of file
1285
# close the IPC pipes
1286
file_objects[source].close()
1287
del file_objects[source]
1288
file_objects[reply_fd].close()
1289
del file_objects[reply_fd]
1290
1291
# Stop calling this function
1292
return False
1293
1294
logger.debug(u"IPC command: %r", cmdline)
1295
1296
# Parse and act on command
1297
cmd, args = cmdline.rstrip(u"\r\n").split(None, 1)
1298
1299
if cmd == u"NOTFOUND":
1300
fpr, address = args.split(None, 1)
1301
logger.warning(u"Client not found for fingerprint: %s, ad"
1302
u"dress: %s", fpr, address)
1303
if self.use_dbus:
1304
# Emit D-Bus signal
1305
mandos_dbus_service.ClientNotFound(fpr, address)
1306
elif cmd == u"DISABLED":
1307
for client in self.clients:
1308
if client.name == args:
1309
logger.warning(u"Client %s is disabled", args)
1310
if self.use_dbus:
1311
# Emit D-Bus signal
1312
client.Rejected()
1313
break
1314
else:
1315
logger.error(u"Unknown client %s is disabled", args)
1316
elif cmd == u"SENDING":
1317
for client in self.clients:
1318
if client.name == args:
1319
logger.info(u"Sending secret to %s", client.name)
1320
client.checked_ok()
1321
if self.use_dbus:
1322
# Emit D-Bus signal
1323
client.GotSecret()
1324
break
1325
else:
1326
logger.error(u"Sending secret to unknown client %s",
1327
args)
1328
elif cmd == u"GETATTR":
1329
attr_name, fpr = args.split(None, 1)
1330
for client in self.clients:
1331
if client.fingerprint == fpr:
1332
attr_value = getattr(client, attr_name, None)
1333
logger.debug("IPC reply: %r", attr_value)
1334
pickle.dump(attr_value, file_objects[reply_fd])
1335
break
1336
else:
1337
logger.error(u"Client %s on address %s requesting "
1338
u"attribute %s not found", fpr, address,
1339
attr_name)
1340
pickle.dump(None, file_objects[reply_fd])
1341
else:
1342
logger.error(u"Unknown IPC command: %r", cmdline)
1343
1344
# Keep calling this function
1345
return True
1346
806
1347
807
1348
808
def string_to_delta(interval):
1349
809
"""Parse a string and return a datetime.timedelta
1350
810
1351
>>> string_to_delta(u'7d')
811
>>> string_to_delta('7d')
1352
812
datetime.timedelta(7)
1353
>>> string_to_delta(u'60s')
813
>>> string_to_delta('60s')
1354
814
datetime.timedelta(0, 60)
1355
>>> string_to_delta(u'60m')
815
>>> string_to_delta('60m')
1356
816
datetime.timedelta(0, 3600)
1357
>>> string_to_delta(u'24h')
817
>>> string_to_delta('24h')
1358
818
datetime.timedelta(1)
1359
819
>>> string_to_delta(u'1w')
1360
820
datetime.timedelta(7)
1361
>>> string_to_delta(u'5m 30s')
821
>>> string_to_delta('5m 30s')
1362
822
datetime.timedelta(0, 330)
1363
823
"""
1364
824
timevalue = datetime.timedelta(0)
1377
837
elif suffix == u"w":
1378
838
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1379
839
else:
1380
raise ValueError(u"Unknown suffix %r" % suffix)
1381
except (ValueError, IndexError), e:
1382
raise ValueError(e.message)
840
raise ValueError
841
except (ValueError, IndexError):
842
raise ValueError
1383
843
timevalue += delta
1384
844
return timevalue
1385
845
1386
846
847
def server_state_changed(state):
848
"""Derived from the Avahi example code"""
849
if state == avahi.SERVER_COLLISION:
850
logger.error(u"Zeroconf server name collision")
851
service.remove()
852
elif state == avahi.SERVER_RUNNING:
853
service.add()
854
855
856
def entry_group_state_changed(state, error):
857
"""Derived from the Avahi example code"""
858
logger.debug(u"Avahi state change: %i", state)
859
860
if state == avahi.ENTRY_GROUP_ESTABLISHED:
861
logger.debug(u"Zeroconf service established.")
862
elif state == avahi.ENTRY_GROUP_COLLISION:
863
logger.warning(u"Zeroconf service name collision.")
864
service.rename()
865
elif state == avahi.ENTRY_GROUP_FAILURE:
866
logger.critical(u"Avahi: Error in group state changed %s",
867
unicode(error))
868
raise AvahiGroupError(u"State changed: %s" % unicode(error))
869
1387
870
def if_nametoindex(interface):
1388
"""Call the C function if_nametoindex(), or equivalent
1389
1390
Note: This function cannot accept a unicode string."""
871
"""Call the C function if_nametoindex(), or equivalent"""
1391
872
global if_nametoindex
1392
873
try:
1393
874
if_nametoindex = (ctypes.cdll.LoadLibrary
1394
(ctypes.util.find_library(u"c"))
875
(ctypes.util.find_library("c"))
1395
876
.if_nametoindex)
1396
877
except (OSError, AttributeError):
1397
logger.warning(u"Doing if_nametoindex the hard way")
878
if "struct" not in sys.modules:
879
import struct
880
if "fcntl" not in sys.modules:
881
import fcntl
1398
882
def if_nametoindex(interface):
1399
883
"Get an interface index the hard way, i.e. using fcntl()"
1400
884
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1401
with contextlib.closing(socket.socket()) as s:
885
with closing(socket.socket()) as s:
1402
886
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1403
struct.pack(str(u"16s16x"),
1404
interface))
1405
interface_index = struct.unpack(str(u"I"),
1406
ifreq[16:20])[0]
887
struct.pack("16s16x", interface))
888
interface_index = struct.unpack("I", ifreq[16:20])[0]
1407
889
return interface_index
1408
890
return if_nametoindex(interface)
1409
891
1410
892
1411
893
def daemon(nochdir = False, noclose = False):
1412
894
"""See daemon(3). Standard BSD Unix function.
1413
1414
895
This should really exist as os.daemon, but it doesn't (yet)."""
1415
896
if os.fork():
1416
897
sys.exit()
1417
898
os.setsid()
1418
899
if not nochdir:
1419
os.chdir(u"/")
900
os.chdir("/")
1420
901
if os.fork():
1421
902
sys.exit()
1422
903
if not noclose:
1424
905
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1425
906
if not stat.S_ISCHR(os.fstat(null).st_mode):
1426
907
raise OSError(errno.ENODEV,
1427
u"%s not a character device"
1428
% os.path.devnull)
908
"/dev/null not a character device")
1429
909
os.dup2(null, sys.stdin.fileno())
1430
910
os.dup2(null, sys.stdout.fileno())
1431
911
os.dup2(null, sys.stderr.fileno())
1434
914
1435
915
1436
916
def main():
1437
1438
##################################################################
1439
# Parsing of options, both command line and config file
1440
1441
917
parser = optparse.OptionParser(version = "%%prog %s" % version)
1442
parser.add_option("-i", u"--interface", type=u"string",
1443
metavar="IF", help=u"Bind to interface IF")
1444
parser.add_option("-a", u"--address", type=u"string",
1445
help=u"Address to listen for requests on")
1446
parser.add_option("-p", u"--port", type=u"int",
1447
help=u"Port number to receive requests on")
1448
parser.add_option("--check", action=u"store_true",
1449
help=u"Run self-test")
1450
parser.add_option("--debug", action=u"store_true",
1451
help=u"Debug mode; run in foreground and log to"
1452
u" terminal")
1453
parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1454
u" priority string (see GnuTLS documentation)")
1455
parser.add_option("--servicename", type=u"string",
1456
metavar=u"NAME", help=u"Zeroconf service name")
1457
parser.add_option("--configdir", type=u"string",
1458
default=u"/etc/mandos", metavar=u"DIR",
1459
help=u"Directory to search for configuration"
1460
u" files")
1461
parser.add_option("--no-dbus", action=u"store_false",
1462
dest=u"use_dbus", help=u"Do not provide D-Bus"
1463
u" system bus interface")
1464
parser.add_option("--no-ipv6", action=u"store_false",
1465
dest=u"use_ipv6", help=u"Do not use IPv6")
918
parser.add_option("-i", "--interface", type="string",
919
metavar="IF", help="Bind to interface IF")
920
parser.add_option("-a", "--address", type="string",
921
help="Address to listen for requests on")
922
parser.add_option("-p", "--port", type="int",
923
help="Port number to receive requests on")
924
parser.add_option("--check", action="store_true",
925
help="Run self-test")
926
parser.add_option("--debug", action="store_true",
927
help="Debug mode; run in foreground and log to"
928
" terminal")
929
parser.add_option("--priority", type="string", help="GnuTLS"
930
" priority string (see GnuTLS documentation)")
931
parser.add_option("--servicename", type="string", metavar="NAME",
932
help="Zeroconf service name")
933
parser.add_option("--configdir", type="string",
934
default="/etc/mandos", metavar="DIR",
935
help="Directory to search for configuration"
936
" files")
937
parser.add_option("--no-dbus", action="store_false",
938
dest="use_dbus",
939
help="Do not provide D-Bus system bus"
940
" interface")
941
parser.add_option("--no-ipv6", action="store_false",
942
dest="use_ipv6", help="Do not use IPv6")
1466
943
options = parser.parse_args()[0]
1467
944
1468
945
if options.check:
1471
948
sys.exit()
1472
949
1473
950
# Default values for config file for server-global settings
1474
server_defaults = { u"interface": u"",
1475
u"address": u"",
1476
u"port": u"",
1477
u"debug": u"False",
1478
u"priority":
1479
u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1480
u"servicename": u"Mandos",
1481
u"use_dbus": u"True",
1482
u"use_ipv6": u"True",
951
server_defaults = { "interface": "",
952
"address": "",
953
"port": "",
954
"debug": "False",
955
"priority":
956
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
957
"servicename": "Mandos",
958
"use_dbus": "True",
959
"use_ipv6": "True",
1483
960
}
1484
961
1485
962
# Parse config file for server-global settings
1486
server_config = configparser.SafeConfigParser(server_defaults)
963
server_config = ConfigParser.SafeConfigParser(server_defaults)
1487
964
del server_defaults
1488
server_config.read(os.path.join(options.configdir,
1489
u"mandos.conf"))
965
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1490
966
# Convert the SafeConfigParser object to a dict
1491
967
server_settings = server_config.defaults()
1492
968
# Use the appropriate methods on the non-string config options
1493
for option in (u"debug", u"use_dbus", u"use_ipv6"):
1494
server_settings[option] = server_config.getboolean(u"DEFAULT",
1495
option)
969
server_settings["debug"] = server_config.getboolean("DEFAULT",
970
"debug")
971
server_settings["use_dbus"] = server_config.getboolean("DEFAULT",
972
"use_dbus")
973
server_settings["use_ipv6"] = server_config.getboolean("DEFAULT",
974
"use_ipv6")
1496
975
if server_settings["port"]:
1497
server_settings["port"] = server_config.getint(u"DEFAULT",
1498
u"port")
976
server_settings["port"] = server_config.getint("DEFAULT",
977
"port")
1499
978
del server_config
1500
979
1501
980
# Override the settings from the config file with command line
1502
981
# options, if set.
1503
for option in (u"interface", u"address", u"port", u"debug",
1504
u"priority", u"servicename", u"configdir",
1505
u"use_dbus", u"use_ipv6"):
982
for option in ("interface", "address", "port", "debug",
983
"priority", "servicename", "configdir",
984
"use_dbus", "use_ipv6"):
1506
985
value = getattr(options, option)
1507
986
if value is not None:
1508
987
server_settings[option] = value
1509
988
del options
1510
# Force all strings to be unicode
1511
for option in server_settings.keys():
1512
if type(server_settings[option]) is str:
1513
server_settings[option] = unicode(server_settings[option])
1514
989
# Now we have our good server settings in "server_settings"
1515
990
1516
##################################################################
1517
1518
991
# For convenience
1519
debug = server_settings[u"debug"]
1520
use_dbus = server_settings[u"use_dbus"]
1521
use_ipv6 = server_settings[u"use_ipv6"]
992
debug = server_settings["debug"]
993
use_dbus = server_settings["use_dbus"]
994
use_ipv6 = server_settings["use_ipv6"]
1522
995
1523
996
if not debug:
1524
997
syslogger.setLevel(logging.WARNING)
1525
998
console.setLevel(logging.WARNING)
1526
999
1527
if server_settings[u"servicename"] != u"Mandos":
1000
if server_settings["servicename"] != "Mandos":
1528
1001
syslogger.setFormatter(logging.Formatter
1529
(u'Mandos (%s) [%%(process)d]:'
1530
u' %%(levelname)s: %%(message)s'
1531
% server_settings[u"servicename"]))
1002
('Mandos (%s): %%(levelname)s:'
1003
' %%(message)s'
1004
% server_settings["servicename"]))
1532
1005
1533
1006
# Parse config file with clients
1534
client_defaults = { u"timeout": u"1h",
1535
u"interval": u"5m",
1536
u"checker": u"fping -q -- %%(host)s",
1537
u"host": u"",
1007
client_defaults = { "timeout": "1h",
1008
"interval": "5m",
1009
"checker": "fping -q -- %%(host)s",
1010
"host": "",
1538
1011
}
1539
client_config = configparser.SafeConfigParser(client_defaults)
1540
client_config.read(os.path.join(server_settings[u"configdir"],
1541
u"clients.conf"))
1542
1543
global mandos_dbus_service
1544
mandos_dbus_service = None
1545
1546
tcp_server = MandosServer((server_settings[u"address"],
1547
server_settings[u"port"]),
1548
ClientHandler,
1549
interface=server_settings[u"interface"],
1550
use_ipv6=use_ipv6,
1551
gnutls_priority=
1552
server_settings[u"priority"],
1553
use_dbus=use_dbus)
1554
pidfilename = u"/var/run/mandos.pid"
1012
client_config = ConfigParser.SafeConfigParser(client_defaults)
1013
client_config.read(os.path.join(server_settings["configdir"],
1014
"clients.conf"))
1015
1016
clients = Set()
1017
tcp_server = IPv6_TCPServer((server_settings["address"],
1018
server_settings["port"]),
1019
TCP_handler,
1020
settings=server_settings,
1021
clients=clients, use_ipv6=use_ipv6)
1022
pidfilename = "/var/run/mandos.pid"
1555
1023
try:
1556
pidfile = open(pidfilename, u"w")
1024
pidfile = open(pidfilename, "w")
1557
1025
except IOError:
1558
logger.error(u"Could not open file %r", pidfilename)
1026
logger.error("Could not open file %r", pidfilename)
1559
1027
1560
1028
try:
1561
uid = pwd.getpwnam(u"_mandos").pw_uid
1562
gid = pwd.getpwnam(u"_mandos").pw_gid
1029
uid = pwd.getpwnam("_mandos").pw_uid
1030
gid = pwd.getpwnam("_mandos").pw_gid
1563
1031
except KeyError:
1564
1032
try:
1565
uid = pwd.getpwnam(u"mandos").pw_uid
1566
gid = pwd.getpwnam(u"mandos").pw_gid
1033
uid = pwd.getpwnam("mandos").pw_uid
1034
gid = pwd.getpwnam("mandos").pw_gid
1567
1035
except KeyError:
1568
1036
try:
1569
uid = pwd.getpwnam(u"nobody").pw_uid
1570
gid = pwd.getpwnam(u"nobody").pw_gid
1037
uid = pwd.getpwnam("nobody").pw_uid
1038
gid = pwd.getpwnam("nogroup").pw_gid
1571
1039
except KeyError:
1572
1040
uid = 65534
1573
1041
gid = 65534
1586
1054
1587
1055
@gnutls.library.types.gnutls_log_func
1588
1056
def debug_gnutls(level, string):
1589
logger.debug(u"GnuTLS: %s", string[:-1])
1057
logger.debug("GnuTLS: %s", string[:-1])
1590
1058
1591
1059
(gnutls.library.functions
1592
1060
.gnutls_global_set_log_function(debug_gnutls))
1593
1061
1062
global service
1063
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1064
service = AvahiService(name = server_settings["servicename"],
1065
servicetype = "_mandos._tcp",
1066
protocol = protocol)
1067
if server_settings["interface"]:
1068
service.interface = (if_nametoindex
1069
(server_settings["interface"]))
1070
1594
1071
global main_loop
1072
global bus
1073
global server
1595
1074
# From the Avahi example code
1596
1075
DBusGMainLoop(set_as_default=True )
1597
1076
main_loop = gobject.MainLoop()
1598
1077
bus = dbus.SystemBus()
1078
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
1079
avahi.DBUS_PATH_SERVER),
1080
avahi.DBUS_INTERFACE_SERVER)
1599
1081
# End of Avahi example code
1600
1082
if use_dbus:
1601
try:
1602
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos",
1603
bus, do_not_queue=True)
1604
except dbus.exceptions.NameExistsException, e:
1605
logger.error(unicode(e) + u", disabling D-Bus")
1606
use_dbus = False
1607
server_settings[u"use_dbus"] = False
1608
tcp_server.use_dbus = False
1609
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1610
service = AvahiService(name = server_settings[u"servicename"],
1611
servicetype = u"_mandos._tcp",
1612
protocol = protocol, bus = bus)
1613
if server_settings["interface"]:
1614
service.interface = (if_nametoindex
1615
(str(server_settings[u"interface"])))
1083
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
1616
1084
1617
client_class = Client
1618
if use_dbus:
1619
client_class = functools.partial(ClientDBus, bus = bus)
1620
tcp_server.clients.update(set(
1621
client_class(name = section,
1622
config= dict(client_config.items(section)))
1623
for section in client_config.sections()))
1624
if not tcp_server.clients:
1085
clients.update(Set(Client(name = section,
1086
config
1087
= dict(client_config.items(section)),
1088
use_dbus = use_dbus)
1089
for section in client_config.sections()))
1090
if not clients:
1625
1091
logger.warning(u"No clients defined")
1626
1092
1627
1093
if debug:
1637
1103
daemon()
1638
1104
1639
1105
try:
1640
with pidfile:
1641
pid = os.getpid()
1642
pidfile.write(str(pid) + "\n")
1106
pid = os.getpid()
1107
pidfile.write(str(pid) + "\n")
1108
pidfile.close()
1643
1109
del pidfile
1644
1110
except IOError:
1645
1111
logger.error(u"Could not write to file %r with PID %d",
1649
1115
pass
1650
1116
del pidfilename
1651
1117
1118
def cleanup():
1119
"Cleanup function; run on exit"
1120
global group
1121
# From the Avahi example code
1122
if not group is None:
1123
group.Free()
1124
group = None
1125
# End of Avahi example code
1126
1127
while clients:
1128
client = clients.pop()
1129
client.disable_hook = None
1130
client.disable()
1131
1132
atexit.register(cleanup)
1133
1652
1134
if not debug:
1653
1135
signal.signal(signal.SIGINT, signal.SIG_IGN)
1654
1136
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1655
1137
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1656
1138
1657
1139
if use_dbus:
1658
class MandosDBusService(dbus.service.Object):
1140
class MandosServer(dbus.service.Object):
1659
1141
"""A D-Bus proxy object"""
1660
1142
def __init__(self):
1661
dbus.service.Object.__init__(self, bus, u"/")
1143
dbus.service.Object.__init__(self, bus, "/")
1662
1144
_interface = u"se.bsnet.fukt.Mandos"
1663
1145
1664
@dbus.service.signal(_interface, signature=u"o")
1665
def ClientAdded(self, objpath):
1666
"D-Bus signal"
1667
pass
1668
1669
@dbus.service.signal(_interface, signature=u"ss")
1670
def ClientNotFound(self, fingerprint, address):
1671
"D-Bus signal"
1672
pass
1673
1674
@dbus.service.signal(_interface, signature=u"os")
1146
@dbus.service.signal(_interface, signature="oa{sv}")
1147
def ClientAdded(self, objpath, properties):
1148
"D-Bus signal"
1149
pass
1150
1151
@dbus.service.signal(_interface, signature="os")
1675
1152
def ClientRemoved(self, objpath, name):
1676
1153
"D-Bus signal"
1677
1154
pass
1678
1155
1679
@dbus.service.method(_interface, out_signature=u"ao")
1156
@dbus.service.method(_interface, out_signature="ao")
1680
1157
def GetAllClients(self):
1681
1158
"D-Bus method"
1682
return dbus.Array(c.dbus_object_path
1683
for c in tcp_server.clients)
1159
return dbus.Array(c.dbus_object_path for c in clients)
1684
1160
1685
@dbus.service.method(_interface,
1686
out_signature=u"a{oa{sv}}")
1161
@dbus.service.method(_interface, out_signature="a{oa{sv}}")
1687
1162
def GetAllClientsWithProperties(self):
1688
1163
"D-Bus method"
1689
1164
return dbus.Dictionary(
1690
((c.dbus_object_path, c.GetAll(u""))
1691
for c in tcp_server.clients),
1692
signature=u"oa{sv}")
1165
((c.dbus_object_path, c.GetAllProperties())
1166
for c in clients),
1167
signature="oa{sv}")
1693
1168
1694
@dbus.service.method(_interface, in_signature=u"o")
1169
@dbus.service.method(_interface, in_signature="o")
1695
1170
def RemoveClient(self, object_path):
1696
1171
"D-Bus method"
1697
for c in tcp_server.clients:
1172
for c in clients:
1698
1173
if c.dbus_object_path == object_path:
1699
tcp_server.clients.remove(c)
1700
c.remove_from_connection()
1174
clients.remove(c)
1701
1175
# Don't signal anything except ClientRemoved
1702
c.disable(quiet=True)
1176
c.use_dbus = False
1177
c.disable()
1703
1178
# Emit D-Bus signal
1704
1179
self.ClientRemoved(object_path, c.name)
1705
1180
return
1706
raise KeyError(object_path)
1181
raise KeyError
1707
1182
1708
1183
del _interface
1709
1184
1710
mandos_dbus_service = MandosDBusService()
1711
1712
def cleanup():
1713
"Cleanup function; run on exit"
1714
service.cleanup()
1715
1716
while tcp_server.clients:
1717
client = tcp_server.clients.pop()
1718
if use_dbus:
1719
client.remove_from_connection()
1720
client.disable_hook = None
1721
# Don't signal anything except ClientRemoved
1722
client.disable(quiet=True)
1723
if use_dbus:
1724
# Emit D-Bus signal
1725
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
1726
client.name)
1727
1728
atexit.register(cleanup)
1729
1730
for client in tcp_server.clients:
1185
mandos_server = MandosServer()
1186
1187
for client in clients:
1731
1188
if use_dbus:
1732
1189
# Emit D-Bus signal
1733
mandos_dbus_service.ClientAdded(client.dbus_object_path)
1190
mandos_server.ClientAdded(client.dbus_object_path,
1191
client.GetAllProperties())
1734
1192
client.enable()
1735
1193
1736
1194
tcp_server.enable()
1750
1208
1751
1209
try:
1752
1210
# From the Avahi example code
1211
server.connect_to_signal("StateChanged", server_state_changed)
1753
1212
try:
1754
service.activate()
1213
server_state_changed(server.GetState())
1755
1214
except dbus.exceptions.DBusException, error:
1756
1215
logger.critical(u"DBusException: %s", error)
1757
cleanup()
1758
1216
sys.exit(1)
1759
1217
# End of Avahi example code
1760
1218
1767
1225
main_loop.run()
1768
1226
except AvahiError, error:
1769
1227
logger.critical(u"AvahiError: %s", error)
1770
cleanup()
1771
1228
sys.exit(1)
1772
1229
except KeyboardInterrupt:
1773
1230
if debug:
1774
1231
print >> sys.stderr
1775
logger.debug(u"Server received KeyboardInterrupt")
1776
logger.debug(u"Server exiting")
1777
# Must run before the D-Bus bus name gets deregistered
1778
cleanup()
1232
logger.debug("Server received KeyboardInterrupt")
1233
logger.debug("Server exiting")
1779
1234
1780
1235
if __name__ == '__main__':
1781
1236
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0