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- Committer: Teddy Hogeborn
- Date: 2009-12-27 03:35:58 UTC
- Revision ID: teddy@fukt.bsnet.se-20091227033558-y57wv1u4cls3i8kq
TODO file changes.
- files added:
- dbus-mandos.conf
- files removed:
- debian/mandos-client.config
- files renamed:
- mandos-list => mandos-ctl
- 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" and "remove" in the "AvahiService" class, the
10
# "server_state_changed" and "entry_group_state_changed" functions,
11
# and some lines in "main".
9
# methods "add", "remove", "server_state_changed",
10
# "entry_group_state_changed", "cleanup", and "activate" in the
11
# "AvahiService" class, and some lines in "main".
12
12
#
13
13
# Everything else is
14
14
# Copyright © 2008,2009 Teddy Hogeborn
33
33
34
34
from __future__ import division, with_statement, absolute_import
35
35
36
import SocketServer
36
import SocketServer as socketserver
37
37
import socket
38
from optparse import OptionParser
38
import optparse
39
39
import datetime
40
40
import errno
41
41
import gnutls.crypto
44
44
import gnutls.library.functions
45
45
import gnutls.library.constants
46
46
import gnutls.library.types
47
import ConfigParser
47
import ConfigParser as configparser
48
48
import sys
49
49
import re
50
50
import os
51
51
import signal
52
from sets import Set
53
52
import subprocess
54
53
import atexit
55
54
import stat
56
55
import logging
57
56
import logging.handlers
58
57
import pwd
59
from contextlib import closing
58
import contextlib
59
import struct
60
import fcntl
61
import functools
62
import cPickle as pickle
60
63
61
64
import dbus
62
65
import dbus.service
65
68
from dbus.mainloop.glib import DBusGMainLoop
66
69
import ctypes
67
70
import ctypes.util
68
69
version = "1.0.3"
70
71
logger = logging.Logger('mandos')
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')
72
86
syslogger = (logging.handlers.SysLogHandler
73
87
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
74
88
address = "/dev/log"))
75
89
syslogger.setFormatter(logging.Formatter
76
('Mandos: %(levelname)s: %(message)s'))
90
(u'Mandos [%(process)d]: %(levelname)s:'
91
u' %(message)s'))
77
92
logger.addHandler(syslogger)
78
93
79
94
console = logging.StreamHandler()
80
console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
81
' %(message)s'))
95
console.setFormatter(logging.Formatter(u'%(name)s [%(process)d]:'
96
u' %(levelname)s:'
97
u' %(message)s'))
82
98
logger.addHandler(console)
83
99
84
100
class AvahiError(Exception):
97
113
98
114
class AvahiService(object):
99
115
"""An Avahi (Zeroconf) service.
116
100
117
Attributes:
101
118
interface: integer; avahi.IF_UNSPEC or an interface index.
102
119
Used to optionally bind to the specified interface.
103
name: string; Example: 'Mandos'
104
type: string; Example: '_mandos._tcp'.
120
name: string; Example: u'Mandos'
121
type: string; Example: u'_mandos._tcp'.
105
122
See <http://www.dns-sd.org/ServiceTypes.html>
106
123
port: integer; what port to announce
107
124
TXT: list of strings; TXT record for the service
110
127
max_renames: integer; maximum number of renames
111
128
rename_count: integer; counter so we only rename after collisions
112
129
a sensible number of times
130
group: D-Bus Entry Group
131
server: D-Bus Server
132
bus: dbus.SystemBus()
113
133
"""
114
134
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
115
135
servicetype = None, port = None, TXT = None,
116
domain = "", host = "", max_renames = 32768):
136
domain = u"", host = u"", max_renames = 32768,
137
protocol = avahi.PROTO_UNSPEC, bus = None):
117
138
self.interface = interface
118
139
self.name = name
119
140
self.type = servicetype
123
144
self.host = host
124
145
self.rename_count = 0
125
146
self.max_renames = max_renames
147
self.protocol = protocol
148
self.group = None # our entry group
149
self.server = None
150
self.bus = bus
126
151
def rename(self):
127
152
"""Derived from the Avahi example code"""
128
153
if self.rename_count >= self.max_renames:
130
155
u" after %i retries, exiting.",
131
156
self.rename_count)
132
157
raise AvahiServiceError(u"Too many renames")
133
self.name = server.GetAlternativeServiceName(self.name)
158
self.name = self.server.GetAlternativeServiceName(self.name)
134
159
logger.info(u"Changing Zeroconf service name to %r ...",
135
str(self.name))
160
unicode(self.name))
136
161
syslogger.setFormatter(logging.Formatter
137
('Mandos (%s): %%(levelname)s:'
138
' %%(message)s' % self.name))
162
(u'Mandos (%s) [%%(process)d]:'
163
u' %%(levelname)s: %%(message)s'
164
% self.name))
139
165
self.remove()
140
166
self.add()
141
167
self.rename_count += 1
142
168
def remove(self):
143
169
"""Derived from the Avahi example code"""
144
if group is not None:
145
group.Reset()
170
if self.group is not None:
171
self.group.Reset()
146
172
def add(self):
147
173
"""Derived from the Avahi example code"""
148
global group
149
if group is None:
150
group = dbus.Interface(bus.get_object
151
(avahi.DBUS_NAME,
152
server.EntryGroupNew()),
153
avahi.DBUS_INTERFACE_ENTRY_GROUP)
154
group.connect_to_signal('StateChanged',
155
entry_group_state_changed)
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)
156
182
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
157
service.name, service.type)
158
group.AddService(
159
self.interface, # interface
160
avahi.PROTO_INET6, # protocol
161
dbus.UInt32(0), # flags
162
self.name, self.type,
163
self.domain, self.host,
164
dbus.UInt16(self.port),
165
avahi.string_array_to_txt_array(self.TXT))
166
group.Commit()
167
168
# From the Avahi example code:
169
group = None # our entry group
170
# End of Avahi example code
171
172
173
def _datetime_to_dbus(dt, variant_level=0):
174
"""Convert a UTC datetime.datetime() to a D-Bus type."""
175
return dbus.String(dt.isoformat(), variant_level=variant_level)
176
177
178
class Client(dbus.service.Object):
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):
179
232
"""A representation of a client host served by this server.
233
180
234
Attributes:
181
name: string; from the config file, used in log messages
235
name: string; from the config file, used in log messages and
236
D-Bus identifiers
182
237
fingerprint: string (40 or 32 hexadecimal digits); used to
183
238
uniquely identify the client
184
239
secret: bytestring; sent verbatim (over TLS) to client
188
243
enabled: bool()
189
244
last_checked_ok: datetime.datetime(); (UTC) or None
190
245
timeout: datetime.timedelta(); How long from last_checked_ok
191
until this client is invalid
246
until this client is disabled
192
247
interval: datetime.timedelta(); How often to start a new checker
193
248
disable_hook: If set, called by disable() as disable_hook(self)
194
249
checker: subprocess.Popen(); a running checker process used
195
250
to see if the client lives.
196
251
'None' if no process is running.
197
252
checker_initiator_tag: a gobject event source tag, or None
198
disable_initiator_tag: - '' -
253
disable_initiator_tag: - '' -
199
254
checker_callback_tag: - '' -
200
255
checker_command: string; External command which is run to check if
201
256
client lives. %() expansions are done at
202
257
runtime with vars(self) as dict, so that for
203
258
instance %(name)s can be used in the command.
204
use_dbus: bool(); Whether to provide D-Bus interface and signals
205
dbus_object_path: dbus.ObjectPath ; only set if self.use_dbus
259
current_checker_command: string; current running checker_command
206
260
"""
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
207
269
def timeout_milliseconds(self):
208
270
"Return the 'timeout' attribute in milliseconds"
209
return ((self.timeout.days * 24 * 60 * 60 * 1000)
210
+ (self.timeout.seconds * 1000)
211
+ (self.timeout.microseconds // 1000))
271
return self._timedelta_to_milliseconds(self.timeout)
212
272
213
273
def interval_milliseconds(self):
214
274
"Return the 'interval' attribute in milliseconds"
215
return ((self.interval.days * 24 * 60 * 60 * 1000)
216
+ (self.interval.seconds * 1000)
217
+ (self.interval.microseconds // 1000))
275
return self._timedelta_to_milliseconds(self.interval)
218
276
219
def __init__(self, name = None, disable_hook=None, config=None,
220
use_dbus=True):
277
def __init__(self, name = None, disable_hook=None, config=None):
221
278
"""Note: the 'checker' key in 'config' sets the
222
279
'checker_command' attribute and *not* the 'checker'
223
280
attribute."""
225
282
if config is None:
226
283
config = {}
227
284
logger.debug(u"Creating client %r", self.name)
228
self.use_dbus = use_dbus
229
if self.use_dbus:
230
self.dbus_object_path = (dbus.ObjectPath
231
("/Mandos/clients/"
232
+ self.name.replace(".", "_")))
233
dbus.service.Object.__init__(self, bus,
234
self.dbus_object_path)
235
285
# Uppercase and remove spaces from fingerprint for later
236
286
# comparison purposes with return value from the fingerprint()
237
287
# function
238
self.fingerprint = (config["fingerprint"].upper()
288
self.fingerprint = (config[u"fingerprint"].upper()
239
289
.replace(u" ", u""))
240
290
logger.debug(u" Fingerprint: %s", self.fingerprint)
241
if "secret" in config:
242
self.secret = config["secret"].decode(u"base64")
243
elif "secfile" in config:
244
with closing(open(os.path.expanduser
245
(os.path.expandvars
246
(config["secfile"])))) as secfile:
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:
247
297
self.secret = secfile.read()
248
298
else:
249
299
raise TypeError(u"No secret or secfile for client %s"
250
300
% self.name)
251
self.host = config.get("host", "")
301
self.host = config.get(u"host", u"")
252
302
self.created = datetime.datetime.utcnow()
253
303
self.enabled = False
254
304
self.last_enabled = None
255
305
self.last_checked_ok = None
256
self.timeout = string_to_delta(config["timeout"])
257
self.interval = string_to_delta(config["interval"])
306
self.timeout = string_to_delta(config[u"timeout"])
307
self.interval = string_to_delta(config[u"interval"])
258
308
self.disable_hook = disable_hook
259
309
self.checker = None
260
310
self.checker_initiator_tag = None
261
311
self.disable_initiator_tag = None
262
312
self.checker_callback_tag = None
263
self.checker_command = config["checker"]
313
self.checker_command = config[u"checker"]
314
self.current_checker_command = None
315
self.last_connect = None
264
316
265
317
def enable(self):
266
318
"""Start this client's checker and timeout hooks"""
319
if getattr(self, u"enabled", False):
320
# Already enabled
321
return
267
322
self.last_enabled = datetime.datetime.utcnow()
268
323
# Schedule a new checker to be started an 'interval' from now,
269
324
# and every interval from then on.
270
325
self.checker_initiator_tag = (gobject.timeout_add
271
326
(self.interval_milliseconds(),
272
327
self.start_checker))
273
# Also start a new checker *right now*.
274
self.start_checker()
275
328
# Schedule a disable() when 'timeout' has passed
276
329
self.disable_initiator_tag = (gobject.timeout_add
277
330
(self.timeout_milliseconds(),
278
331
self.disable))
279
332
self.enabled = True
280
if self.use_dbus:
281
# Emit D-Bus signals
282
self.PropertyChanged(dbus.String(u"enabled"),
283
dbus.Boolean(True, variant_level=1))
284
self.PropertyChanged(dbus.String(u"last_enabled"),
285
(_datetime_to_dbus(self.last_enabled,
286
variant_level=1)))
333
# Also start a new checker *right now*.
334
self.start_checker()
287
335
288
def disable(self):
336
def disable(self, quiet=True):
289
337
"""Disable this client."""
290
338
if not getattr(self, "enabled", False):
291
339
return False
292
logger.info(u"Disabling client %s", self.name)
293
if getattr(self, "disable_initiator_tag", False):
340
if not quiet:
341
logger.info(u"Disabling client %s", self.name)
342
if getattr(self, u"disable_initiator_tag", False):
294
343
gobject.source_remove(self.disable_initiator_tag)
295
344
self.disable_initiator_tag = None
296
if getattr(self, "checker_initiator_tag", False):
345
if getattr(self, u"checker_initiator_tag", False):
297
346
gobject.source_remove(self.checker_initiator_tag)
298
347
self.checker_initiator_tag = None
299
348
self.stop_checker()
300
349
if self.disable_hook:
301
350
self.disable_hook(self)
302
351
self.enabled = False
303
if self.use_dbus:
304
# Emit D-Bus signal
305
self.PropertyChanged(dbus.String(u"enabled"),
306
dbus.Boolean(False, variant_level=1))
307
352
# Do not run this again if called by a gobject.timeout_add
308
353
return False
309
354
315
360
"""The checker has completed, so take appropriate actions."""
316
361
self.checker_callback_tag = None
317
362
self.checker = None
318
if self.use_dbus:
319
# Emit D-Bus signal
320
self.PropertyChanged(dbus.String(u"checker_running"),
321
dbus.Boolean(False, variant_level=1))
322
if (os.WIFEXITED(condition)
323
and (os.WEXITSTATUS(condition) == 0)):
324
logger.info(u"Checker for %(name)s succeeded",
325
vars(self))
326
if self.use_dbus:
327
# Emit D-Bus signal
328
self.CheckerCompleted(dbus.Boolean(True),
329
dbus.UInt16(condition),
330
dbus.String(command))
331
self.bump_timeout()
332
elif not os.WIFEXITED(condition):
363
if os.WIFEXITED(condition):
364
exitstatus = os.WEXITSTATUS(condition)
365
if exitstatus == 0:
366
logger.info(u"Checker for %(name)s succeeded",
367
vars(self))
368
self.checked_ok()
369
else:
370
logger.info(u"Checker for %(name)s failed",
371
vars(self))
372
else:
333
373
logger.warning(u"Checker for %(name)s crashed?",
334
374
vars(self))
335
if self.use_dbus:
336
# Emit D-Bus signal
337
self.CheckerCompleted(dbus.Boolean(False),
338
dbus.UInt16(condition),
339
dbus.String(command))
340
else:
341
logger.info(u"Checker for %(name)s failed",
342
vars(self))
343
if self.use_dbus:
344
# Emit D-Bus signal
345
self.CheckerCompleted(dbus.Boolean(False),
346
dbus.UInt16(condition),
347
dbus.String(command))
348
375
349
def bump_timeout(self):
376
def checked_ok(self):
350
377
"""Bump up the timeout for this client.
378
351
379
This should only be called when the client has been seen,
352
380
alive and well.
353
381
"""
356
384
self.disable_initiator_tag = (gobject.timeout_add
357
385
(self.timeout_milliseconds(),
358
386
self.disable))
359
if self.use_dbus:
360
# Emit D-Bus signal
361
self.PropertyChanged(
362
dbus.String(u"last_checked_ok"),
363
(_datetime_to_dbus(self.last_checked_ok,
364
variant_level=1)))
365
387
366
388
def start_checker(self):
367
389
"""Start a new checker subprocess if one is not running.
390
368
391
If a checker already exists, leave it running and do
369
392
nothing."""
370
393
# The reason for not killing a running checker is that if we
373
396
# client would inevitably timeout, since no checker would get
374
397
# a chance to run to completion. If we instead leave running
375
398
# checkers alone, the checker would have to take more time
376
# than 'timeout' for the client to be declared invalid, which
377
# is as it should be.
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
378
416
if self.checker is None:
379
417
try:
380
418
# In case checker_command has exactly one % operator
381
419
command = self.checker_command % self.host
382
420
except TypeError:
383
421
# Escape attributes for the shell
384
escaped_attrs = dict((key, re.escape(str(val)))
422
escaped_attrs = dict((key,
423
re.escape(unicode(str(val),
424
errors=
425
u'replace')))
385
426
for key, val in
386
427
vars(self).iteritems())
387
428
try:
390
431
logger.error(u'Could not format string "%s":'
391
432
u' %s', self.checker_command, error)
392
433
return True # Try again later
434
self.current_checker_command = command
393
435
try:
394
436
logger.info(u"Starting checker %r for %s",
395
437
command, self.name)
399
441
# always replaced by /dev/null.)
400
442
self.checker = subprocess.Popen(command,
401
443
close_fds=True,
402
shell=True, cwd="/")
403
if self.use_dbus:
404
# Emit D-Bus signal
405
self.CheckerStarted(command)
406
self.PropertyChanged(
407
dbus.String("checker_running"),
408
dbus.Boolean(True, variant_level=1))
444
shell=True, cwd=u"/")
409
445
self.checker_callback_tag = (gobject.child_watch_add
410
446
(self.checker.pid,
411
447
self.checker_callback,
412
448
data=command))
449
# The checker may have completed before the gobject
450
# watch was added. Check for this.
451
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
452
if pid:
453
gobject.source_remove(self.checker_callback_tag)
454
self.checker_callback(pid, status, command)
413
455
except OSError, error:
414
456
logger.error(u"Failed to start subprocess: %s",
415
457
error)
421
463
if self.checker_callback_tag:
422
464
gobject.source_remove(self.checker_callback_tag)
423
465
self.checker_callback_tag = None
424
if getattr(self, "checker", None) is None:
466
if getattr(self, u"checker", None) is None:
425
467
return
426
468
logger.debug(u"Stopping checker for %(name)s", vars(self))
427
469
try:
428
470
os.kill(self.checker.pid, signal.SIGTERM)
429
#os.sleep(0.5)
471
#time.sleep(0.5)
430
472
#if self.checker.poll() is None:
431
473
# os.kill(self.checker.pid, signal.SIGKILL)
432
474
except OSError, error:
433
475
if error.errno != errno.ESRCH: # No such process
434
476
raise
435
477
self.checker = None
436
if self.use_dbus:
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):
437
779
self.PropertyChanged(dbus.String(u"checker_running"),
438
780
dbus.Boolean(False, variant_level=1))
439
440
def still_valid(self):
441
"""Has the timeout not yet passed for this client?"""
442
if not getattr(self, "enabled", False):
443
return False
444
now = datetime.datetime.utcnow()
445
if self.last_checked_ok is None:
446
return now < (self.created + self.timeout)
447
else:
448
return now < (self.last_checked_ok + self.timeout)
781
return r
449
782
450
783
## D-Bus methods & signals
451
_interface = u"org.mandos_system.Mandos.Client"
784
_interface = u"se.bsnet.fukt.Mandos.Client"
452
785
453
# BumpTimeout - method
454
BumpTimeout = dbus.service.method(_interface)(bump_timeout)
455
BumpTimeout.__name__ = "BumpTimeout"
786
# CheckedOK - method
787
@dbus.service.method(_interface)
788
def CheckedOK(self):
789
return self.checked_ok()
456
790
457
791
# CheckerCompleted - signal
458
@dbus.service.signal(_interface, signature="bqs")
459
def CheckerCompleted(self, success, condition, command):
792
@dbus.service.signal(_interface, signature=u"nxs")
793
def CheckerCompleted(self, exitcode, waitstatus, command):
460
794
"D-Bus signal"
461
795
pass
462
796
463
797
# CheckerStarted - signal
464
@dbus.service.signal(_interface, signature="s")
798
@dbus.service.signal(_interface, signature=u"s")
465
799
def CheckerStarted(self, command):
466
800
"D-Bus signal"
467
801
pass
468
802
469
# GetAllProperties - method
470
@dbus.service.method(_interface, out_signature="a{sv}")
471
def GetAllProperties(self):
472
"D-Bus method"
473
return dbus.Dictionary({
474
dbus.String("name"):
475
dbus.String(self.name, variant_level=1),
476
dbus.String("fingerprint"):
477
dbus.String(self.fingerprint, variant_level=1),
478
dbus.String("host"):
479
dbus.String(self.host, variant_level=1),
480
dbus.String("created"):
481
_datetime_to_dbus(self.created, variant_level=1),
482
dbus.String("last_enabled"):
483
(_datetime_to_dbus(self.last_enabled,
484
variant_level=1)
485
if self.last_enabled is not None
486
else dbus.Boolean(False, variant_level=1)),
487
dbus.String("enabled"):
488
dbus.Boolean(self.enabled, variant_level=1),
489
dbus.String("last_checked_ok"):
490
(_datetime_to_dbus(self.last_checked_ok,
491
variant_level=1)
492
if self.last_checked_ok is not None
493
else dbus.Boolean (False, variant_level=1)),
494
dbus.String("timeout"):
495
dbus.UInt64(self.timeout_milliseconds(),
496
variant_level=1),
497
dbus.String("interval"):
498
dbus.UInt64(self.interval_milliseconds(),
499
variant_level=1),
500
dbus.String("checker"):
501
dbus.String(self.checker_command,
502
variant_level=1),
503
dbus.String("checker_running"):
504
dbus.Boolean(self.checker is not None,
505
variant_level=1),
506
}, signature="sv")
507
508
# IsStillValid - method
509
IsStillValid = (dbus.service.method(_interface, out_signature="b")
510
(still_valid))
511
IsStillValid.__name__ = "IsStillValid"
512
513
803
# PropertyChanged - signal
514
@dbus.service.signal(_interface, signature="sv")
804
@dbus.service.signal(_interface, signature=u"sv")
515
805
def PropertyChanged(self, property, value):
516
806
"D-Bus signal"
517
807
pass
518
808
519
# SetChecker - method
520
@dbus.service.method(_interface, in_signature="s")
521
def SetChecker(self, checker):
522
"D-Bus setter method"
523
self.checker_command = checker
524
# Emit D-Bus signal
525
self.PropertyChanged(dbus.String(u"checker"),
526
dbus.String(self.checker_command,
527
variant_level=1))
528
529
# SetHost - method
530
@dbus.service.method(_interface, in_signature="s")
531
def SetHost(self, host):
532
"D-Bus setter method"
533
self.host = host
534
# Emit D-Bus signal
535
self.PropertyChanged(dbus.String(u"host"),
536
dbus.String(self.host, variant_level=1))
537
538
# SetInterval - method
539
@dbus.service.method(_interface, in_signature="t")
540
def SetInterval(self, milliseconds):
541
self.interval = datetime.timedelta(0, 0, 0, milliseconds)
542
# Emit D-Bus signal
543
self.PropertyChanged(dbus.String(u"interval"),
544
(dbus.UInt64(self.interval_milliseconds(),
545
variant_level=1)))
546
547
# SetSecret - method
548
@dbus.service.method(_interface, in_signature="ay",
549
byte_arrays=True)
550
def SetSecret(self, secret):
551
"D-Bus setter method"
552
self.secret = str(secret)
553
554
# SetTimeout - method
555
@dbus.service.method(_interface, in_signature="t")
556
def SetTimeout(self, milliseconds):
557
self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
558
# Emit D-Bus signal
559
self.PropertyChanged(dbus.String(u"timeout"),
560
(dbus.UInt64(self.timeout_milliseconds(),
561
variant_level=1)))
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
562
820
563
821
# Enable - method
564
Enable = dbus.service.method(_interface)(enable)
565
Enable.__name__ = "Enable"
822
@dbus.service.method(_interface)
823
def Enable(self):
824
"D-Bus method"
825
self.enable()
566
826
567
827
# StartChecker - method
568
828
@dbus.service.method(_interface)
577
837
self.disable()
578
838
579
839
# StopChecker - method
580
StopChecker = dbus.service.method(_interface)(stop_checker)
581
StopChecker.__name__ = "StopChecker"
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)
582
979
583
980
del _interface
584
981
585
982
586
def peer_certificate(session):
587
"Return the peer's OpenPGP certificate as a bytestring"
588
# If not an OpenPGP certificate...
589
if (gnutls.library.functions
590
.gnutls_certificate_type_get(session._c_object)
591
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
592
# ...do the normal thing
593
return session.peer_certificate
594
list_size = ctypes.c_uint()
595
cert_list = (gnutls.library.functions
596
.gnutls_certificate_get_peers
597
(session._c_object, ctypes.byref(list_size)))
598
if list_size.value == 0:
599
return None
600
cert = cert_list[0]
601
return ctypes.string_at(cert.data, cert.size)
602
603
604
def fingerprint(openpgp):
605
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
606
# New GnuTLS "datum" with the OpenPGP public key
607
datum = (gnutls.library.types
608
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
609
ctypes.POINTER
610
(ctypes.c_ubyte)),
611
ctypes.c_uint(len(openpgp))))
612
# New empty GnuTLS certificate
613
crt = gnutls.library.types.gnutls_openpgp_crt_t()
614
(gnutls.library.functions
615
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
616
# Import the OpenPGP public key into the certificate
617
(gnutls.library.functions
618
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
619
gnutls.library.constants
620
.GNUTLS_OPENPGP_FMT_RAW))
621
# Verify the self signature in the key
622
crtverify = ctypes.c_uint()
623
(gnutls.library.functions
624
.gnutls_openpgp_crt_verify_self(crt, 0, ctypes.byref(crtverify)))
625
if crtverify.value != 0:
626
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
627
raise gnutls.errors.CertificateSecurityError("Verify failed")
628
# New buffer for the fingerprint
629
buf = ctypes.create_string_buffer(20)
630
buf_len = ctypes.c_size_t()
631
# Get the fingerprint from the certificate into the buffer
632
(gnutls.library.functions
633
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
634
ctypes.byref(buf_len)))
635
# Deinit the certificate
636
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
637
# Convert the buffer to a Python bytestring
638
fpr = ctypes.string_at(buf, buf_len.value)
639
# Convert the bytestring to hexadecimal notation
640
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
641
return hex_fpr
642
643
644
class TCP_handler(SocketServer.BaseRequestHandler, object):
645
"""A TCP request handler class.
646
Instantiated by IPv6_TCPServer for each request to handle it.
983
class ClientHandler(socketserver.BaseRequestHandler, object):
984
"""A class to handle client connections.
985
986
Instantiated once for each connection to handle it.
647
987
Note: This will run in its own forked process."""
648
988
649
989
def handle(self):
650
990
logger.info(u"TCP connection from: %s",
651
991
unicode(self.client_address))
652
session = (gnutls.connection
653
.ClientSession(self.request,
654
gnutls.connection
655
.X509Credentials()))
656
657
line = self.request.makefile().readline()
658
logger.debug(u"Protocol version: %r", line)
659
try:
660
if int(line.strip().split()[0]) > 1:
661
raise RuntimeError
662
except (ValueError, IndexError, RuntimeError), error:
663
logger.error(u"Unknown protocol version: %s", error)
664
return
665
666
# Note: gnutls.connection.X509Credentials is really a generic
667
# GnuTLS certificate credentials object so long as no X.509
668
# keys are added to it. Therefore, we can use it here despite
669
# using OpenPGP certificates.
670
671
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
672
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
673
# "+DHE-DSS"))
674
# Use a fallback default, since this MUST be set.
675
priority = self.server.settings.get("priority", "NORMAL")
676
(gnutls.library.functions
677
.gnutls_priority_set_direct(session._c_object,
678
priority, None))
679
680
try:
681
session.handshake()
682
except gnutls.errors.GNUTLSError, error:
683
logger.warning(u"Handshake failed: %s", error)
684
# Do not run session.bye() here: the session is not
685
# established. Just abandon the request.
686
return
687
try:
688
fpr = fingerprint(peer_certificate(session))
689
except (TypeError, gnutls.errors.GNUTLSError), error:
690
logger.warning(u"Bad certificate: %s", error)
691
session.bye()
692
return
693
logger.debug(u"Fingerprint: %s", fpr)
694
for c in self.server.clients:
695
if c.fingerprint == fpr:
696
client = c
697
break
698
else:
699
logger.warning(u"Client not found for fingerprint: %s",
700
fpr)
701
session.bye()
702
return
703
# Have to check if client.still_valid(), since it is possible
704
# that the client timed out while establishing the GnuTLS
705
# session.
706
if not client.still_valid():
707
logger.warning(u"Client %(name)s is invalid",
708
vars(client))
709
session.bye()
710
return
711
## This won't work here, since we're in a fork.
712
# client.bump_timeout()
713
sent_size = 0
714
while sent_size < len(client.secret):
715
sent = session.send(client.secret[sent_size:])
716
logger.debug(u"Sent: %d, remaining: %d",
717
sent, len(client.secret)
718
- (sent_size + sent))
719
sent_size += sent
720
session.bye()
721
722
723
class IPv6_TCPServer(SocketServer.ForkingMixIn,
724
SocketServer.TCPServer, object):
725
"""IPv6 TCP server. Accepts 'None' as address and/or port.
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
726
1163
Attributes:
727
settings: Server settings
728
clients: Set() of Client objects
729
1164
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
730
1167
"""
731
address_family = socket.AF_INET6
732
def __init__(self, *args, **kwargs):
733
if "settings" in kwargs:
734
self.settings = kwargs["settings"]
735
del kwargs["settings"]
736
if "clients" in kwargs:
737
self.clients = kwargs["clients"]
738
del kwargs["clients"]
739
self.enabled = False
740
super(IPv6_TCPServer, self).__init__(*args, **kwargs)
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)
741
1175
def server_bind(self):
742
1176
"""This overrides the normal server_bind() function
743
1177
to bind to an interface if one was specified, and also NOT to
744
1178
bind to an address or port if they were not specified."""
745
if self.settings["interface"]:
746
# 25 is from /usr/include/asm-i486/socket.h
747
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
748
try:
749
self.socket.setsockopt(socket.SOL_SOCKET,
750
SO_BINDTODEVICE,
751
self.settings["interface"])
752
except socket.error, error:
753
if error[0] == errno.EPERM:
754
logger.error(u"No permission to"
755
u" bind to interface %s",
756
self.settings["interface"])
757
else:
758
raise error
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
759
1201
# Only bind(2) the socket if we really need to.
760
1202
if self.server_address[0] or self.server_address[1]:
761
1203
if not self.server_address[0]:
762
in6addr_any = "::"
763
self.server_address = (in6addr_any,
1204
if self.address_family == socket.AF_INET6:
1205
any_address = u"::" # in6addr_any
1206
else:
1207
any_address = socket.INADDR_ANY
1208
self.server_address = (any_address,
764
1209
self.server_address[1])
765
1210
elif not self.server_address[1]:
766
1211
self.server_address = (self.server_address[0],
767
1212
0)
768
# if self.settings["interface"]:
1213
# if self.interface:
769
1214
# self.server_address = (self.server_address[0],
770
1215
# 0, # port
771
1216
# 0, # flowinfo
772
1217
# if_nametoindex
773
# (self.settings
774
# ["interface"]))
775
return super(IPv6_TCPServer, self).server_bind()
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)
776
1245
def server_activate(self):
777
1246
if self.enabled:
778
return super(IPv6_TCPServer, self).server_activate()
1247
return socketserver.TCPServer.server_activate(self)
779
1248
def enable(self):
780
1249
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
781
1346
782
1347
783
1348
def string_to_delta(interval):
784
1349
"""Parse a string and return a datetime.timedelta
785
786
>>> string_to_delta('7d')
1350
1351
>>> string_to_delta(u'7d')
787
1352
datetime.timedelta(7)
788
>>> string_to_delta('60s')
1353
>>> string_to_delta(u'60s')
789
1354
datetime.timedelta(0, 60)
790
>>> string_to_delta('60m')
1355
>>> string_to_delta(u'60m')
791
1356
datetime.timedelta(0, 3600)
792
>>> string_to_delta('24h')
1357
>>> string_to_delta(u'24h')
793
1358
datetime.timedelta(1)
794
1359
>>> string_to_delta(u'1w')
795
1360
datetime.timedelta(7)
796
>>> string_to_delta('5m 30s')
1361
>>> string_to_delta(u'5m 30s')
797
1362
datetime.timedelta(0, 330)
798
1363
"""
799
1364
timevalue = datetime.timedelta(0)
812
1377
elif suffix == u"w":
813
1378
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
814
1379
else:
815
raise ValueError
816
except (ValueError, IndexError):
817
raise ValueError
1380
raise ValueError(u"Unknown suffix %r" % suffix)
1381
except (ValueError, IndexError), e:
1382
raise ValueError(e.message)
818
1383
timevalue += delta
819
1384
return timevalue
820
1385
821
1386
822
def server_state_changed(state):
823
"""Derived from the Avahi example code"""
824
if state == avahi.SERVER_COLLISION:
825
logger.error(u"Zeroconf server name collision")
826
service.remove()
827
elif state == avahi.SERVER_RUNNING:
828
service.add()
829
830
831
def entry_group_state_changed(state, error):
832
"""Derived from the Avahi example code"""
833
logger.debug(u"Avahi state change: %i", state)
834
835
if state == avahi.ENTRY_GROUP_ESTABLISHED:
836
logger.debug(u"Zeroconf service established.")
837
elif state == avahi.ENTRY_GROUP_COLLISION:
838
logger.warning(u"Zeroconf service name collision.")
839
service.rename()
840
elif state == avahi.ENTRY_GROUP_FAILURE:
841
logger.critical(u"Avahi: Error in group state changed %s",
842
unicode(error))
843
raise AvahiGroupError(u"State changed: %s" % unicode(error))
844
845
1387
def if_nametoindex(interface):
846
"""Call the C function if_nametoindex(), or equivalent"""
1388
"""Call the C function if_nametoindex(), or equivalent
1389
1390
Note: This function cannot accept a unicode string."""
847
1391
global if_nametoindex
848
1392
try:
849
1393
if_nametoindex = (ctypes.cdll.LoadLibrary
850
(ctypes.util.find_library("c"))
1394
(ctypes.util.find_library(u"c"))
851
1395
.if_nametoindex)
852
1396
except (OSError, AttributeError):
853
if "struct" not in sys.modules:
854
import struct
855
if "fcntl" not in sys.modules:
856
import fcntl
1397
logger.warning(u"Doing if_nametoindex the hard way")
857
1398
def if_nametoindex(interface):
858
1399
"Get an interface index the hard way, i.e. using fcntl()"
859
1400
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
860
with closing(socket.socket()) as s:
1401
with contextlib.closing(socket.socket()) as s:
861
1402
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
862
struct.pack("16s16x", interface))
863
interface_index = struct.unpack("I", ifreq[16:20])[0]
1403
struct.pack(str(u"16s16x"),
1404
interface))
1405
interface_index = struct.unpack(str(u"I"),
1406
ifreq[16:20])[0]
864
1407
return interface_index
865
1408
return if_nametoindex(interface)
866
1409
867
1410
868
1411
def daemon(nochdir = False, noclose = False):
869
1412
"""See daemon(3). Standard BSD Unix function.
1413
870
1414
This should really exist as os.daemon, but it doesn't (yet)."""
871
1415
if os.fork():
872
1416
sys.exit()
873
1417
os.setsid()
874
1418
if not nochdir:
875
os.chdir("/")
1419
os.chdir(u"/")
876
1420
if os.fork():
877
1421
sys.exit()
878
1422
if not noclose:
880
1424
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
881
1425
if not stat.S_ISCHR(os.fstat(null).st_mode):
882
1426
raise OSError(errno.ENODEV,
883
"/dev/null not a character device")
1427
u"%s not a character device"
1428
% os.path.devnull)
884
1429
os.dup2(null, sys.stdin.fileno())
885
1430
os.dup2(null, sys.stdout.fileno())
886
1431
os.dup2(null, sys.stderr.fileno())
889
1434
890
1435
891
1436
def main():
892
parser = OptionParser(version = "%%prog %s" % version)
893
parser.add_option("-i", "--interface", type="string",
894
metavar="IF", help="Bind to interface IF")
895
parser.add_option("-a", "--address", type="string",
896
help="Address to listen for requests on")
897
parser.add_option("-p", "--port", type="int",
898
help="Port number to receive requests on")
899
parser.add_option("--check", action="store_true",
900
help="Run self-test")
901
parser.add_option("--debug", action="store_true",
902
help="Debug mode; run in foreground and log to"
903
" terminal")
904
parser.add_option("--priority", type="string", help="GnuTLS"
905
" priority string (see GnuTLS documentation)")
906
parser.add_option("--servicename", type="string", metavar="NAME",
907
help="Zeroconf service name")
908
parser.add_option("--configdir", type="string",
909
default="/etc/mandos", metavar="DIR",
910
help="Directory to search for configuration"
911
" files")
912
parser.add_option("--no-dbus", action="store_false",
913
dest="use_dbus",
914
help="Do not provide D-Bus system bus"
915
" interface")
1437
1438
##################################################################
1439
# Parsing of options, both command line and config file
1440
1441
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")
916
1466
options = parser.parse_args()[0]
917
1467
918
1468
if options.check:
921
1471
sys.exit()
922
1472
923
1473
# Default values for config file for server-global settings
924
server_defaults = { "interface": "",
925
"address": "",
926
"port": "",
927
"debug": "False",
928
"priority":
929
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
930
"servicename": "Mandos",
931
"use_dbus": "True",
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",
932
1483
}
933
1484
934
1485
# Parse config file for server-global settings
935
server_config = ConfigParser.SafeConfigParser(server_defaults)
1486
server_config = configparser.SafeConfigParser(server_defaults)
936
1487
del server_defaults
937
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1488
server_config.read(os.path.join(options.configdir,
1489
u"mandos.conf"))
938
1490
# Convert the SafeConfigParser object to a dict
939
1491
server_settings = server_config.defaults()
940
# Use getboolean on the boolean config options
941
server_settings["debug"] = (server_config.getboolean
942
("DEFAULT", "debug"))
943
server_settings["use_dbus"] = (server_config.getboolean
944
("DEFAULT", "use_dbus"))
1492
# 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)
1496
if server_settings["port"]:
1497
server_settings["port"] = server_config.getint(u"DEFAULT",
1498
u"port")
945
1499
del server_config
946
1500
947
1501
# Override the settings from the config file with command line
948
1502
# options, if set.
949
for option in ("interface", "address", "port", "debug",
950
"priority", "servicename", "configdir",
951
"use_dbus"):
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"):
952
1506
value = getattr(options, option)
953
1507
if value is not None:
954
1508
server_settings[option] = value
955
1509
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])
956
1514
# Now we have our good server settings in "server_settings"
957
1515
1516
##################################################################
1517
958
1518
# For convenience
959
debug = server_settings["debug"]
960
use_dbus = server_settings["use_dbus"]
1519
debug = server_settings[u"debug"]
1520
use_dbus = server_settings[u"use_dbus"]
1521
use_ipv6 = server_settings[u"use_ipv6"]
961
1522
962
1523
if not debug:
963
1524
syslogger.setLevel(logging.WARNING)
964
1525
console.setLevel(logging.WARNING)
965
1526
966
if server_settings["servicename"] != "Mandos":
1527
if server_settings[u"servicename"] != u"Mandos":
967
1528
syslogger.setFormatter(logging.Formatter
968
('Mandos (%s): %%(levelname)s:'
969
' %%(message)s'
970
% server_settings["servicename"]))
1529
(u'Mandos (%s) [%%(process)d]:'
1530
u' %%(levelname)s: %%(message)s'
1531
% server_settings[u"servicename"]))
971
1532
972
1533
# Parse config file with clients
973
client_defaults = { "timeout": "1h",
974
"interval": "5m",
975
"checker": "fping -q -- %(host)s",
976
"host": "",
1534
client_defaults = { u"timeout": u"1h",
1535
u"interval": u"5m",
1536
u"checker": u"fping -q -- %%(host)s",
1537
u"host": u"",
977
1538
}
978
client_config = ConfigParser.SafeConfigParser(client_defaults)
979
client_config.read(os.path.join(server_settings["configdir"],
980
"clients.conf"))
981
982
clients = Set()
983
tcp_server = IPv6_TCPServer((server_settings["address"],
984
server_settings["port"]),
985
TCP_handler,
986
settings=server_settings,
987
clients=clients)
988
pidfilename = "/var/run/mandos.pid"
989
try:
990
pidfile = open(pidfilename, "w")
991
except IOError, error:
992
logger.error("Could not open file %r", pidfilename)
993
994
try:
995
uid = pwd.getpwnam("_mandos").pw_uid
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"
1555
try:
1556
pidfile = open(pidfilename, u"w")
1557
except IOError:
1558
logger.error(u"Could not open file %r", pidfilename)
1559
1560
try:
1561
uid = pwd.getpwnam(u"_mandos").pw_uid
1562
gid = pwd.getpwnam(u"_mandos").pw_gid
996
1563
except KeyError:
997
1564
try:
998
uid = pwd.getpwnam("mandos").pw_uid
1565
uid = pwd.getpwnam(u"mandos").pw_uid
1566
gid = pwd.getpwnam(u"mandos").pw_gid
999
1567
except KeyError:
1000
1568
try:
1001
uid = pwd.getpwnam("nobody").pw_uid
1569
uid = pwd.getpwnam(u"nobody").pw_uid
1570
gid = pwd.getpwnam(u"nobody").pw_gid
1002
1571
except KeyError:
1003
1572
uid = 65534
1004
try:
1005
gid = pwd.getpwnam("_mandos").pw_gid
1006
except KeyError:
1007
try:
1008
gid = pwd.getpwnam("mandos").pw_gid
1009
except KeyError:
1010
try:
1011
gid = pwd.getpwnam("nogroup").pw_gid
1012
except KeyError:
1013
1573
gid = 65534
1014
1574
try:
1575
os.setgid(gid)
1015
1576
os.setuid(uid)
1016
os.setgid(gid)
1017
1577
except OSError, error:
1018
1578
if error[0] != errno.EPERM:
1019
1579
raise error
1020
1580
1021
global service
1022
service = AvahiService(name = server_settings["servicename"],
1023
servicetype = "_mandos._tcp", )
1024
if server_settings["interface"]:
1025
service.interface = (if_nametoindex
1026
(server_settings["interface"]))
1581
# Enable all possible GnuTLS debugging
1582
if debug:
1583
# "Use a log level over 10 to enable all debugging options."
1584
# - GnuTLS manual
1585
gnutls.library.functions.gnutls_global_set_log_level(11)
1586
1587
@gnutls.library.types.gnutls_log_func
1588
def debug_gnutls(level, string):
1589
logger.debug(u"GnuTLS: %s", string[:-1])
1590
1591
(gnutls.library.functions
1592
.gnutls_global_set_log_function(debug_gnutls))
1027
1593
1028
1594
global main_loop
1029
global bus
1030
global server
1031
1595
# From the Avahi example code
1032
1596
DBusGMainLoop(set_as_default=True )
1033
1597
main_loop = gobject.MainLoop()
1034
1598
bus = dbus.SystemBus()
1035
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
1036
avahi.DBUS_PATH_SERVER),
1037
avahi.DBUS_INTERFACE_SERVER)
1038
1599
# End of Avahi example code
1039
1600
if use_dbus:
1040
bus_name = dbus.service.BusName(u"org.mandos-system.Mandos",
1041
bus)
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"])))
1042
1616
1043
clients.update(Set(Client(name = section,
1044
config
1045
= dict(client_config.items(section)),
1046
use_dbus = use_dbus)
1047
for section in client_config.sections()))
1048
if not clients:
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:
1049
1625
logger.warning(u"No clients defined")
1050
1626
1051
1627
if debug:
1061
1637
daemon()
1062
1638
1063
1639
try:
1064
pid = os.getpid()
1065
pidfile.write(str(pid) + "\n")
1066
pidfile.close()
1640
with pidfile:
1641
pid = os.getpid()
1642
pidfile.write(str(pid) + "\n")
1067
1643
del pidfile
1068
1644
except IOError:
1069
1645
logger.error(u"Could not write to file %r with PID %d",
1073
1649
pass
1074
1650
del pidfilename
1075
1651
1076
def cleanup():
1077
"Cleanup function; run on exit"
1078
global group
1079
# From the Avahi example code
1080
if not group is None:
1081
group.Free()
1082
group = None
1083
# End of Avahi example code
1084
1085
while clients:
1086
client = clients.pop()
1087
client.disable_hook = None
1088
client.disable()
1089
1090
atexit.register(cleanup)
1091
1092
1652
if not debug:
1093
1653
signal.signal(signal.SIGINT, signal.SIG_IGN)
1094
1654
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1095
1655
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1096
1656
1097
1657
if use_dbus:
1098
class MandosServer(dbus.service.Object):
1658
class MandosDBusService(dbus.service.Object):
1099
1659
"""A D-Bus proxy object"""
1100
1660
def __init__(self):
1101
dbus.service.Object.__init__(self, bus,
1102
"/Mandos")
1103
_interface = u"org.mandos_system.Mandos"
1104
1105
@dbus.service.signal(_interface, signature="oa{sv}")
1106
def ClientAdded(self, objpath, properties):
1107
"D-Bus signal"
1108
pass
1109
1110
@dbus.service.signal(_interface, signature="o")
1111
def ClientRemoved(self, objpath):
1112
"D-Bus signal"
1113
pass
1114
1115
@dbus.service.method(_interface, out_signature="ao")
1661
dbus.service.Object.__init__(self, bus, u"/")
1662
_interface = u"se.bsnet.fukt.Mandos"
1663
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")
1675
def ClientRemoved(self, objpath, name):
1676
"D-Bus signal"
1677
pass
1678
1679
@dbus.service.method(_interface, out_signature=u"ao")
1116
1680
def GetAllClients(self):
1117
return dbus.Array(c.dbus_object_path for c in clients)
1118
1119
@dbus.service.method(_interface, out_signature="a{oa{sv}}")
1681
"D-Bus method"
1682
return dbus.Array(c.dbus_object_path
1683
for c in tcp_server.clients)
1684
1685
@dbus.service.method(_interface,
1686
out_signature=u"a{oa{sv}}")
1120
1687
def GetAllClientsWithProperties(self):
1688
"D-Bus method"
1121
1689
return dbus.Dictionary(
1122
((c.dbus_object_path, c.GetAllProperties())
1123
for c in clients),
1124
signature="oa{sv}")
1125
1126
@dbus.service.method(_interface, in_signature="o")
1690
((c.dbus_object_path, c.GetAll(u""))
1691
for c in tcp_server.clients),
1692
signature=u"oa{sv}")
1693
1694
@dbus.service.method(_interface, in_signature=u"o")
1127
1695
def RemoveClient(self, object_path):
1128
for c in clients:
1696
"D-Bus method"
1697
for c in tcp_server.clients:
1129
1698
if c.dbus_object_path == object_path:
1130
clients.remove(c)
1699
tcp_server.clients.remove(c)
1700
c.remove_from_connection()
1131
1701
# Don't signal anything except ClientRemoved
1132
c.use_dbus = False
1133
c.disable()
1702
c.disable(quiet=True)
1134
1703
# Emit D-Bus signal
1135
self.ClientRemoved(object_path)
1704
self.ClientRemoved(object_path, c.name)
1136
1705
return
1137
raise KeyError
1138
@dbus.service.method(_interface)
1139
def Quit(self):
1140
main_loop.quit()
1141
1706
raise KeyError(object_path)
1707
1142
1708
del _interface
1143
1144
mandos_server = MandosServer()
1145
1146
for client in clients:
1709
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:
1147
1731
if use_dbus:
1148
1732
# Emit D-Bus signal
1149
mandos_server.ClientAdded(client.dbus_object_path,
1150
client.GetAllProperties())
1733
mandos_dbus_service.ClientAdded(client.dbus_object_path)
1151
1734
client.enable()
1152
1735
1153
1736
tcp_server.enable()
1155
1738
1156
1739
# Find out what port we got
1157
1740
service.port = tcp_server.socket.getsockname()[1]
1158
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
1159
u" scope_id %d" % tcp_server.socket.getsockname())
1741
if use_ipv6:
1742
logger.info(u"Now listening on address %r, port %d,"
1743
" flowinfo %d, scope_id %d"
1744
% tcp_server.socket.getsockname())
1745
else: # IPv4
1746
logger.info(u"Now listening on address %r, port %d"
1747
% tcp_server.socket.getsockname())
1160
1748
1161
1749
#service.interface = tcp_server.socket.getsockname()[3]
1162
1750
1163
1751
try:
1164
1752
# From the Avahi example code
1165
server.connect_to_signal("StateChanged", server_state_changed)
1166
1753
try:
1167
server_state_changed(server.GetState())
1754
service.activate()
1168
1755
except dbus.exceptions.DBusException, error:
1169
1756
logger.critical(u"DBusException: %s", error)
1757
cleanup()
1170
1758
sys.exit(1)
1171
1759
# End of Avahi example code
1172
1760
1179
1767
main_loop.run()
1180
1768
except AvahiError, error:
1181
1769
logger.critical(u"AvahiError: %s", error)
1770
cleanup()
1182
1771
sys.exit(1)
1183
1772
except KeyboardInterrupt:
1184
1773
if debug:
1185
print
1774
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()
1186
1779
1187
1780
if __name__ == '__main__':
1188
1781
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0