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- Committer: Teddy Hogeborn
- Date: 2009-01-18 00:16:57 UTC
- Revision ID: teddy@fukt.bsnet.se-20090118001657-6mo3ae73ldy5tegf
* debian/mandos-client.postinst: Converted to Bourne shell. Also
minor message change.
* debian/mandos-client.postrm: Minor message change.
* debian/mandos.postinst: Converted to Bourne shell. Also minor
message change.
* debian/mandos.prerm: Minor message change.
minor message change.
* debian/mandos-client.postrm: Minor message change.
* debian/mandos.postinst: Converted to Bourne shell. Also minor
message change.
* debian/mandos.prerm: Minor message change.
- 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
63
import multiprocessing
59
from contextlib import closing
64
60
65
61
import dbus
66
62
import dbus.service
69
65
from dbus.mainloop.glib import DBusGMainLoop
70
66
import ctypes
71
67
import ctypes.util
72
import xml.dom.minidom
73
import inspect
74
75
try:
76
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
77
except AttributeError:
78
try:
79
from IN import SO_BINDTODEVICE
80
except ImportError:
81
SO_BINDTODEVICE = None
82
83
84
version = "1.0.14"
85
86
#logger = logging.getLogger(u'mandos')
87
logger = logging.Logger(u'mandos')
68
69
version = "1.0.5"
70
71
logger = logging.Logger('mandos')
88
72
syslogger = (logging.handlers.SysLogHandler
89
73
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
90
74
address = "/dev/log"))
91
75
syslogger.setFormatter(logging.Formatter
92
(u'Mandos [%(process)d]: %(levelname)s:'
93
u' %(message)s'))
76
('Mandos: %(levelname)s: %(message)s'))
94
77
logger.addHandler(syslogger)
95
78
96
79
console = logging.StreamHandler()
97
console.setFormatter(logging.Formatter(u'%(name)s [%(process)d]:'
98
u' %(levelname)s:'
99
u' %(message)s'))
80
console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
81
' %(message)s'))
100
82
logger.addHandler(console)
101
83
102
84
class AvahiError(Exception):
115
97
116
98
class AvahiService(object):
117
99
"""An Avahi (Zeroconf) service.
118
119
100
Attributes:
120
101
interface: integer; avahi.IF_UNSPEC or an interface index.
121
102
Used to optionally bind to the specified interface.
122
name: string; Example: u'Mandos'
123
type: string; Example: u'_mandos._tcp'.
103
name: string; Example: 'Mandos'
104
type: string; Example: '_mandos._tcp'.
124
105
See <http://www.dns-sd.org/ServiceTypes.html>
125
106
port: integer; what port to announce
126
107
TXT: list of strings; TXT record for the service
129
110
max_renames: integer; maximum number of renames
130
111
rename_count: integer; counter so we only rename after collisions
131
112
a sensible number of times
132
group: D-Bus Entry Group
133
server: D-Bus Server
134
bus: dbus.SystemBus()
135
113
"""
136
114
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
137
115
servicetype = None, port = None, TXT = None,
138
domain = u"", host = u"", max_renames = 32768,
139
protocol = avahi.PROTO_UNSPEC, bus = None):
116
domain = "", host = "", max_renames = 32768):
140
117
self.interface = interface
141
118
self.name = name
142
119
self.type = servicetype
146
123
self.host = host
147
124
self.rename_count = 0
148
125
self.max_renames = max_renames
149
self.protocol = protocol
150
self.group = None # our entry group
151
self.server = None
152
self.bus = bus
153
126
def rename(self):
154
127
"""Derived from the Avahi example code"""
155
128
if self.rename_count >= self.max_renames:
157
130
u" after %i retries, exiting.",
158
131
self.rename_count)
159
132
raise AvahiServiceError(u"Too many renames")
160
self.name = unicode(self.server.GetAlternativeServiceName(self.name))
133
self.name = server.GetAlternativeServiceName(self.name)
161
134
logger.info(u"Changing Zeroconf service name to %r ...",
162
self.name)
135
str(self.name))
163
136
syslogger.setFormatter(logging.Formatter
164
(u'Mandos (%s) [%%(process)d]:'
165
u' %%(levelname)s: %%(message)s'
166
% self.name))
137
('Mandos (%s): %%(levelname)s:'
138
' %%(message)s' % self.name))
167
139
self.remove()
168
140
self.add()
169
141
self.rename_count += 1
170
142
def remove(self):
171
143
"""Derived from the Avahi example code"""
172
if self.group is not None:
173
self.group.Reset()
144
if group is not None:
145
group.Reset()
174
146
def add(self):
175
147
"""Derived from the Avahi example code"""
176
if self.group is None:
177
self.group = dbus.Interface(
178
self.bus.get_object(avahi.DBUS_NAME,
179
self.server.EntryGroupNew()),
180
avahi.DBUS_INTERFACE_ENTRY_GROUP)
181
self.group.connect_to_signal('StateChanged',
182
self
183
.entry_group_state_changed)
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)
184
156
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
185
self.name, self.type)
186
self.group.AddService(
187
self.interface,
188
self.protocol,
189
dbus.UInt32(0), # flags
190
self.name, self.type,
191
self.domain, self.host,
192
dbus.UInt16(self.port),
193
avahi.string_array_to_txt_array(self.TXT))
194
self.group.Commit()
195
def entry_group_state_changed(self, state, error):
196
"""Derived from the Avahi example code"""
197
logger.debug(u"Avahi state change: %i", state)
198
199
if state == avahi.ENTRY_GROUP_ESTABLISHED:
200
logger.debug(u"Zeroconf service established.")
201
elif state == avahi.ENTRY_GROUP_COLLISION:
202
logger.warning(u"Zeroconf service name collision.")
203
self.rename()
204
elif state == avahi.ENTRY_GROUP_FAILURE:
205
logger.critical(u"Avahi: Error in group state changed %s",
206
unicode(error))
207
raise AvahiGroupError(u"State changed: %s"
208
% unicode(error))
209
def cleanup(self):
210
"""Derived from the Avahi example code"""
211
if self.group is not None:
212
self.group.Free()
213
self.group = None
214
def server_state_changed(self, state):
215
"""Derived from the Avahi example code"""
216
if state == avahi.SERVER_COLLISION:
217
logger.error(u"Zeroconf server name collision")
218
self.remove()
219
elif state == avahi.SERVER_RUNNING:
220
self.add()
221
def activate(self):
222
"""Derived from the Avahi example code"""
223
if self.server is None:
224
self.server = dbus.Interface(
225
self.bus.get_object(avahi.DBUS_NAME,
226
avahi.DBUS_PATH_SERVER),
227
avahi.DBUS_INTERFACE_SERVER)
228
self.server.connect_to_signal(u"StateChanged",
229
self.server_state_changed)
230
self.server_state_changed(self.server.GetState())
231
232
233
class Client(object):
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):
234
179
"""A representation of a client host served by this server.
235
236
180
Attributes:
237
name: string; from the config file, used in log messages and
238
D-Bus identifiers
181
name: string; from the config file, used in log messages
239
182
fingerprint: string (40 or 32 hexadecimal digits); used to
240
183
uniquely identify the client
241
184
secret: bytestring; sent verbatim (over TLS) to client
245
188
enabled: bool()
246
189
last_checked_ok: datetime.datetime(); (UTC) or None
247
190
timeout: datetime.timedelta(); How long from last_checked_ok
248
until this client is disabled
191
until this client is invalid
249
192
interval: datetime.timedelta(); How often to start a new checker
250
193
disable_hook: If set, called by disable() as disable_hook(self)
251
194
checker: subprocess.Popen(); a running checker process used
252
195
to see if the client lives.
253
196
'None' if no process is running.
254
197
checker_initiator_tag: a gobject event source tag, or None
255
disable_initiator_tag: - '' -
198
disable_initiator_tag: - '' -
256
199
checker_callback_tag: - '' -
257
200
checker_command: string; External command which is run to check if
258
201
client lives. %() expansions are done at
259
202
runtime with vars(self) as dict, so that for
260
203
instance %(name)s can be used in the command.
261
current_checker_command: string; current running checker_command
262
approved_delay: datetime.timedelta(); Time to wait for approval
263
_approved: bool(); 'None' if not yet approved/disapproved
264
approved_duration: datetime.timedelta(); Duration of one approval
204
use_dbus: bool(); Whether to provide D-Bus interface and signals
205
dbus_object_path: dbus.ObjectPath ; only set if self.use_dbus
265
206
"""
266
267
@staticmethod
268
def _timedelta_to_milliseconds(td):
269
"Convert a datetime.timedelta() to milliseconds"
270
return ((td.days * 24 * 60 * 60 * 1000)
271
+ (td.seconds * 1000)
272
+ (td.microseconds // 1000))
273
274
207
def timeout_milliseconds(self):
275
208
"Return the 'timeout' attribute in milliseconds"
276
return self._timedelta_to_milliseconds(self.timeout)
209
return ((self.timeout.days * 24 * 60 * 60 * 1000)
210
+ (self.timeout.seconds * 1000)
211
+ (self.timeout.microseconds // 1000))
277
212
278
213
def interval_milliseconds(self):
279
214
"Return the 'interval' attribute in milliseconds"
280
return self._timedelta_to_milliseconds(self.interval)
281
282
def approved_delay_milliseconds(self):
283
return self._timedelta_to_milliseconds(self.approved_delay)
215
return ((self.interval.days * 24 * 60 * 60 * 1000)
216
+ (self.interval.seconds * 1000)
217
+ (self.interval.microseconds // 1000))
284
218
285
def __init__(self, name = None, disable_hook=None, config=None):
219
def __init__(self, name = None, disable_hook=None, config=None,
220
use_dbus=True):
286
221
"""Note: the 'checker' key in 'config' sets the
287
222
'checker_command' attribute and *not* the 'checker'
288
223
attribute."""
290
225
if config is None:
291
226
config = {}
292
227
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)
293
235
# Uppercase and remove spaces from fingerprint for later
294
236
# comparison purposes with return value from the fingerprint()
295
237
# function
296
self.fingerprint = (config[u"fingerprint"].upper()
238
self.fingerprint = (config["fingerprint"].upper()
297
239
.replace(u" ", u""))
298
240
logger.debug(u" Fingerprint: %s", self.fingerprint)
299
if u"secret" in config:
300
self.secret = config[u"secret"].decode(u"base64")
301
elif u"secfile" in config:
302
with open(os.path.expanduser(os.path.expandvars
303
(config[u"secfile"])),
304
"rb") as secfile:
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:
305
247
self.secret = secfile.read()
306
248
else:
307
249
raise TypeError(u"No secret or secfile for client %s"
308
250
% self.name)
309
self.host = config.get(u"host", u"")
251
self.host = config.get("host", "")
310
252
self.created = datetime.datetime.utcnow()
311
253
self.enabled = False
312
254
self.last_enabled = None
313
255
self.last_checked_ok = None
314
self.timeout = string_to_delta(config[u"timeout"])
315
self.interval = string_to_delta(config[u"interval"])
256
self.timeout = string_to_delta(config["timeout"])
257
self.interval = string_to_delta(config["interval"])
316
258
self.disable_hook = disable_hook
317
259
self.checker = None
318
260
self.checker_initiator_tag = None
319
261
self.disable_initiator_tag = None
320
262
self.checker_callback_tag = None
321
self.checker_command = config[u"checker"]
322
self.current_checker_command = None
323
self.last_connect = None
324
self._approved = None
325
self.approved_by_default = config.get(u"approved_by_default",
326
True)
327
self.approvals_pending = 0
328
self.approved_delay = string_to_delta(
329
config[u"approved_delay"])
330
self.approved_duration = string_to_delta(
331
config[u"approved_duration"])
332
self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())
263
self.checker_command = config["checker"]
333
264
334
def send_changedstate(self):
335
self.changedstate.acquire()
336
self.changedstate.notify_all()
337
self.changedstate.release()
338
339
265
def enable(self):
340
266
"""Start this client's checker and timeout hooks"""
341
if getattr(self, u"enabled", False):
342
# Already enabled
343
return
344
self.send_changedstate()
345
267
self.last_enabled = datetime.datetime.utcnow()
346
268
# Schedule a new checker to be started an 'interval' from now,
347
269
# and every interval from then on.
348
270
self.checker_initiator_tag = (gobject.timeout_add
349
271
(self.interval_milliseconds(),
350
272
self.start_checker))
273
# Also start a new checker *right now*.
274
self.start_checker()
351
275
# Schedule a disable() when 'timeout' has passed
352
276
self.disable_initiator_tag = (gobject.timeout_add
353
277
(self.timeout_milliseconds(),
354
278
self.disable))
355
279
self.enabled = True
356
# Also start a new checker *right now*.
357
self.start_checker()
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)))
358
287
359
def disable(self, quiet=True):
288
def disable(self):
360
289
"""Disable this client."""
361
290
if not getattr(self, "enabled", False):
362
291
return False
363
if not quiet:
364
self.send_changedstate()
365
if not quiet:
366
logger.info(u"Disabling client %s", self.name)
367
if getattr(self, u"disable_initiator_tag", False):
292
logger.info(u"Disabling client %s", self.name)
293
if getattr(self, "disable_initiator_tag", False):
368
294
gobject.source_remove(self.disable_initiator_tag)
369
295
self.disable_initiator_tag = None
370
if getattr(self, u"checker_initiator_tag", False):
296
if getattr(self, "checker_initiator_tag", False):
371
297
gobject.source_remove(self.checker_initiator_tag)
372
298
self.checker_initiator_tag = None
373
299
self.stop_checker()
374
300
if self.disable_hook:
375
301
self.disable_hook(self)
376
302
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))
377
307
# Do not run this again if called by a gobject.timeout_add
378
308
return False
379
309
385
315
"""The checker has completed, so take appropriate actions."""
386
316
self.checker_callback_tag = None
387
317
self.checker = None
388
if os.WIFEXITED(condition):
389
exitstatus = os.WEXITSTATUS(condition)
390
if exitstatus == 0:
391
logger.info(u"Checker for %(name)s succeeded",
392
vars(self))
393
self.checked_ok()
394
else:
395
logger.info(u"Checker for %(name)s failed",
396
vars(self))
397
else:
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):
398
333
logger.warning(u"Checker for %(name)s crashed?",
399
334
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))
400
348
401
def checked_ok(self):
349
def bump_timeout(self):
402
350
"""Bump up the timeout for this client.
403
404
351
This should only be called when the client has been seen,
405
352
alive and well.
406
353
"""
409
356
self.disable_initiator_tag = (gobject.timeout_add
410
357
(self.timeout_milliseconds(),
411
358
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)))
412
365
413
366
def start_checker(self):
414
367
"""Start a new checker subprocess if one is not running.
415
416
368
If a checker already exists, leave it running and do
417
369
nothing."""
418
370
# The reason for not killing a running checker is that if we
421
373
# client would inevitably timeout, since no checker would get
422
374
# a chance to run to completion. If we instead leave running
423
375
# checkers alone, the checker would have to take more time
424
# than 'timeout' for the client to be disabled, which is as it
425
# should be.
426
427
# If a checker exists, make sure it is not a zombie
428
try:
429
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
430
except (AttributeError, OSError), error:
431
if (isinstance(error, OSError)
432
and error.errno != errno.ECHILD):
433
raise error
434
else:
435
if pid:
436
logger.warning(u"Checker was a zombie")
437
gobject.source_remove(self.checker_callback_tag)
438
self.checker_callback(pid, status,
439
self.current_checker_command)
440
# Start a new checker if needed
376
# than 'timeout' for the client to be declared invalid, which
377
# is as it should be.
441
378
if self.checker is None:
442
379
try:
443
380
# In case checker_command has exactly one % operator
444
381
command = self.checker_command % self.host
445
382
except TypeError:
446
383
# Escape attributes for the shell
447
escaped_attrs = dict((key,
448
re.escape(unicode(str(val),
449
errors=
450
u'replace')))
384
escaped_attrs = dict((key, re.escape(str(val)))
451
385
for key, val in
452
386
vars(self).iteritems())
453
387
try:
456
390
logger.error(u'Could not format string "%s":'
457
391
u' %s', self.checker_command, error)
458
392
return True # Try again later
459
self.current_checker_command = command
460
393
try:
461
394
logger.info(u"Starting checker %r for %s",
462
395
command, self.name)
466
399
# always replaced by /dev/null.)
467
400
self.checker = subprocess.Popen(command,
468
401
close_fds=True,
469
shell=True, cwd=u"/")
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))
470
409
self.checker_callback_tag = (gobject.child_watch_add
471
410
(self.checker.pid,
472
411
self.checker_callback,
473
412
data=command))
474
# The checker may have completed before the gobject
475
# watch was added. Check for this.
476
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
477
if pid:
478
gobject.source_remove(self.checker_callback_tag)
479
self.checker_callback(pid, status, command)
480
413
except OSError, error:
481
414
logger.error(u"Failed to start subprocess: %s",
482
415
error)
488
421
if self.checker_callback_tag:
489
422
gobject.source_remove(self.checker_callback_tag)
490
423
self.checker_callback_tag = None
491
if getattr(self, u"checker", None) is None:
424
if getattr(self, "checker", None) is None:
492
425
return
493
426
logger.debug(u"Stopping checker for %(name)s", vars(self))
494
427
try:
495
428
os.kill(self.checker.pid, signal.SIGTERM)
496
#time.sleep(0.5)
429
#os.sleep(0.5)
497
430
#if self.checker.poll() is None:
498
431
# os.kill(self.checker.pid, signal.SIGKILL)
499
432
except OSError, error:
500
433
if error.errno != errno.ESRCH: # No such process
501
434
raise
502
435
self.checker = None
503
504
def dbus_service_property(dbus_interface, signature=u"v",
505
access=u"readwrite", byte_arrays=False):
506
"""Decorators for marking methods of a DBusObjectWithProperties to
507
become properties on the D-Bus.
508
509
The decorated method will be called with no arguments by "Get"
510
and with one argument by "Set".
511
512
The parameters, where they are supported, are the same as
513
dbus.service.method, except there is only "signature", since the
514
type from Get() and the type sent to Set() is the same.
515
"""
516
# Encoding deeply encoded byte arrays is not supported yet by the
517
# "Set" method, so we fail early here:
518
if byte_arrays and signature != u"ay":
519
raise ValueError(u"Byte arrays not supported for non-'ay'"
520
u" signature %r" % signature)
521
def decorator(func):
522
func._dbus_is_property = True
523
func._dbus_interface = dbus_interface
524
func._dbus_signature = signature
525
func._dbus_access = access
526
func._dbus_name = func.__name__
527
if func._dbus_name.endswith(u"_dbus_property"):
528
func._dbus_name = func._dbus_name[:-14]
529
func._dbus_get_args_options = {u'byte_arrays': byte_arrays }
530
return func
531
return decorator
532
533
534
class DBusPropertyException(dbus.exceptions.DBusException):
535
"""A base class for D-Bus property-related exceptions
536
"""
537
def __unicode__(self):
538
return unicode(str(self))
539
540
541
class DBusPropertyAccessException(DBusPropertyException):
542
"""A property's access permissions disallows an operation.
543
"""
544
pass
545
546
547
class DBusPropertyNotFound(DBusPropertyException):
548
"""An attempt was made to access a non-existing property.
549
"""
550
pass
551
552
553
class DBusObjectWithProperties(dbus.service.Object):
554
"""A D-Bus object with properties.
555
556
Classes inheriting from this can use the dbus_service_property
557
decorator to expose methods as D-Bus properties. It exposes the
558
standard Get(), Set(), and GetAll() methods on the D-Bus.
559
"""
560
561
@staticmethod
562
def _is_dbus_property(obj):
563
return getattr(obj, u"_dbus_is_property", False)
564
565
def _get_all_dbus_properties(self):
566
"""Returns a generator of (name, attribute) pairs
567
"""
568
return ((prop._dbus_name, prop)
569
for name, prop in
570
inspect.getmembers(self, self._is_dbus_property))
571
572
def _get_dbus_property(self, interface_name, property_name):
573
"""Returns a bound method if one exists which is a D-Bus
574
property with the specified name and interface.
575
"""
576
for name in (property_name,
577
property_name + u"_dbus_property"):
578
prop = getattr(self, name, None)
579
if (prop is None
580
or not self._is_dbus_property(prop)
581
or prop._dbus_name != property_name
582
or (interface_name and prop._dbus_interface
583
and interface_name != prop._dbus_interface)):
584
continue
585
return prop
586
# No such property
587
raise DBusPropertyNotFound(self.dbus_object_path + u":"
588
+ interface_name + u"."
589
+ property_name)
590
591
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ss",
592
out_signature=u"v")
593
def Get(self, interface_name, property_name):
594
"""Standard D-Bus property Get() method, see D-Bus standard.
595
"""
596
prop = self._get_dbus_property(interface_name, property_name)
597
if prop._dbus_access == u"write":
598
raise DBusPropertyAccessException(property_name)
599
value = prop()
600
if not hasattr(value, u"variant_level"):
601
return value
602
return type(value)(value, variant_level=value.variant_level+1)
603
604
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ssv")
605
def Set(self, interface_name, property_name, value):
606
"""Standard D-Bus property Set() method, see D-Bus standard.
607
"""
608
prop = self._get_dbus_property(interface_name, property_name)
609
if prop._dbus_access == u"read":
610
raise DBusPropertyAccessException(property_name)
611
if prop._dbus_get_args_options[u"byte_arrays"]:
612
# The byte_arrays option is not supported yet on
613
# signatures other than "ay".
614
if prop._dbus_signature != u"ay":
615
raise ValueError
616
value = dbus.ByteArray(''.join(unichr(byte)
617
for byte in value))
618
prop(value)
619
620
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"s",
621
out_signature=u"a{sv}")
622
def GetAll(self, interface_name):
623
"""Standard D-Bus property GetAll() method, see D-Bus
624
standard.
625
626
Note: Will not include properties with access="write".
627
"""
628
all = {}
629
for name, prop in self._get_all_dbus_properties():
630
if (interface_name
631
and interface_name != prop._dbus_interface):
632
# Interface non-empty but did not match
633
continue
634
# Ignore write-only properties
635
if prop._dbus_access == u"write":
636
continue
637
value = prop()
638
if not hasattr(value, u"variant_level"):
639
all[name] = value
640
continue
641
all[name] = type(value)(value, variant_level=
642
value.variant_level+1)
643
return dbus.Dictionary(all, signature=u"sv")
644
645
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
646
out_signature=u"s",
647
path_keyword='object_path',
648
connection_keyword='connection')
649
def Introspect(self, object_path, connection):
650
"""Standard D-Bus method, overloaded to insert property tags.
651
"""
652
xmlstring = dbus.service.Object.Introspect(self, object_path,
653
connection)
654
try:
655
document = xml.dom.minidom.parseString(xmlstring)
656
def make_tag(document, name, prop):
657
e = document.createElement(u"property")
658
e.setAttribute(u"name", name)
659
e.setAttribute(u"type", prop._dbus_signature)
660
e.setAttribute(u"access", prop._dbus_access)
661
return e
662
for if_tag in document.getElementsByTagName(u"interface"):
663
for tag in (make_tag(document, name, prop)
664
for name, prop
665
in self._get_all_dbus_properties()
666
if prop._dbus_interface
667
== if_tag.getAttribute(u"name")):
668
if_tag.appendChild(tag)
669
# Add the names to the return values for the
670
# "org.freedesktop.DBus.Properties" methods
671
if (if_tag.getAttribute(u"name")
672
== u"org.freedesktop.DBus.Properties"):
673
for cn in if_tag.getElementsByTagName(u"method"):
674
if cn.getAttribute(u"name") == u"Get":
675
for arg in cn.getElementsByTagName(u"arg"):
676
if (arg.getAttribute(u"direction")
677
== u"out"):
678
arg.setAttribute(u"name", u"value")
679
elif cn.getAttribute(u"name") == u"GetAll":
680
for arg in cn.getElementsByTagName(u"arg"):
681
if (arg.getAttribute(u"direction")
682
== u"out"):
683
arg.setAttribute(u"name", u"props")
684
xmlstring = document.toxml(u"utf-8")
685
document.unlink()
686
except (AttributeError, xml.dom.DOMException,
687
xml.parsers.expat.ExpatError), error:
688
logger.error(u"Failed to override Introspection method",
689
error)
690
return xmlstring
691
692
693
class ClientDBus(Client, DBusObjectWithProperties):
694
"""A Client class using D-Bus
695
696
Attributes:
697
dbus_object_path: dbus.ObjectPath
698
bus: dbus.SystemBus()
699
"""
700
# dbus.service.Object doesn't use super(), so we can't either.
701
702
def __init__(self, bus = None, *args, **kwargs):
703
self._approvals_pending = 0
704
self.bus = bus
705
Client.__init__(self, *args, **kwargs)
706
# Only now, when this client is initialized, can it show up on
707
# the D-Bus
708
self.dbus_object_path = (dbus.ObjectPath
709
(u"/clients/"
710
+ self.name.replace(u".", u"_")))
711
DBusObjectWithProperties.__init__(self, self.bus,
712
self.dbus_object_path)
713
714
def _get_approvals_pending(self):
715
return self._approvals_pending
716
def _set_approvals_pending(self, value):
717
old_value = self._approvals_pending
718
self._approvals_pending = value
719
bval = bool(value)
720
if (hasattr(self, "dbus_object_path")
721
and bval is not bool(old_value)):
722
dbus_bool = dbus.Boolean(bval, variant_level=1)
723
self.PropertyChanged(dbus.String(u"approved_pending"),
724
dbus_bool)
725
726
approvals_pending = property(_get_approvals_pending,
727
_set_approvals_pending)
728
del _get_approvals_pending, _set_approvals_pending
729
730
@staticmethod
731
def _datetime_to_dbus(dt, variant_level=0):
732
"""Convert a UTC datetime.datetime() to a D-Bus type."""
733
return dbus.String(dt.isoformat(),
734
variant_level=variant_level)
735
736
def enable(self):
737
oldstate = getattr(self, u"enabled", False)
738
r = Client.enable(self)
739
if oldstate != self.enabled:
740
# Emit D-Bus signals
741
self.PropertyChanged(dbus.String(u"enabled"),
742
dbus.Boolean(True, variant_level=1))
743
self.PropertyChanged(
744
dbus.String(u"last_enabled"),
745
self._datetime_to_dbus(self.last_enabled,
746
variant_level=1))
747
return r
748
749
def disable(self, quiet = False):
750
oldstate = getattr(self, u"enabled", False)
751
r = Client.disable(self, quiet=quiet)
752
if not quiet and oldstate != self.enabled:
753
# Emit D-Bus signal
754
self.PropertyChanged(dbus.String(u"enabled"),
755
dbus.Boolean(False, variant_level=1))
756
return r
757
758
def __del__(self, *args, **kwargs):
759
try:
760
self.remove_from_connection()
761
except LookupError:
762
pass
763
if hasattr(DBusObjectWithProperties, u"__del__"):
764
DBusObjectWithProperties.__del__(self, *args, **kwargs)
765
Client.__del__(self, *args, **kwargs)
766
767
def checker_callback(self, pid, condition, command,
768
*args, **kwargs):
769
self.checker_callback_tag = None
770
self.checker = None
771
# Emit D-Bus signal
772
self.PropertyChanged(dbus.String(u"checker_running"),
773
dbus.Boolean(False, variant_level=1))
774
if os.WIFEXITED(condition):
775
exitstatus = os.WEXITSTATUS(condition)
776
# Emit D-Bus signal
777
self.CheckerCompleted(dbus.Int16(exitstatus),
778
dbus.Int64(condition),
779
dbus.String(command))
780
else:
781
# Emit D-Bus signal
782
self.CheckerCompleted(dbus.Int16(-1),
783
dbus.Int64(condition),
784
dbus.String(command))
785
786
return Client.checker_callback(self, pid, condition, command,
787
*args, **kwargs)
788
789
def checked_ok(self, *args, **kwargs):
790
r = Client.checked_ok(self, *args, **kwargs)
791
# Emit D-Bus signal
792
self.PropertyChanged(
793
dbus.String(u"last_checked_ok"),
794
(self._datetime_to_dbus(self.last_checked_ok,
795
variant_level=1)))
796
return r
797
798
def start_checker(self, *args, **kwargs):
799
old_checker = self.checker
800
if self.checker is not None:
801
old_checker_pid = self.checker.pid
802
else:
803
old_checker_pid = None
804
r = Client.start_checker(self, *args, **kwargs)
805
# Only if new checker process was started
806
if (self.checker is not None
807
and old_checker_pid != self.checker.pid):
808
# Emit D-Bus signal
809
self.CheckerStarted(self.current_checker_command)
810
self.PropertyChanged(
811
dbus.String(u"checker_running"),
812
dbus.Boolean(True, variant_level=1))
813
return r
814
815
def stop_checker(self, *args, **kwargs):
816
old_checker = getattr(self, u"checker", None)
817
r = Client.stop_checker(self, *args, **kwargs)
818
if (old_checker is not None
819
and getattr(self, u"checker", None) is None):
436
if self.use_dbus:
820
437
self.PropertyChanged(dbus.String(u"checker_running"),
821
438
dbus.Boolean(False, variant_level=1))
822
return r
823
824
def _reset_approved(self):
825
self._approved = None
826
return False
827
828
def approve(self, value=True):
829
self.send_changedstate()
830
self._approved = value
831
gobject.timeout_add(self._timedelta_to_milliseconds(self.approved_duration),
832
self._reset_approved)
833
834
835
## D-Bus methods, signals & properties
836
_interface = u"se.bsnet.fukt.Mandos.Client"
837
838
## Signals
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)
449
450
## D-Bus methods & signals
451
_interface = u"org.mandos_system.Mandos.Client"
452
453
# BumpTimeout - method
454
BumpTimeout = dbus.service.method(_interface)(bump_timeout)
455
BumpTimeout.__name__ = "BumpTimeout"
839
456
840
457
# CheckerCompleted - signal
841
@dbus.service.signal(_interface, signature=u"nxs")
842
def CheckerCompleted(self, exitcode, waitstatus, command):
458
@dbus.service.signal(_interface, signature="bqs")
459
def CheckerCompleted(self, success, condition, command):
843
460
"D-Bus signal"
844
461
pass
845
462
846
463
# CheckerStarted - signal
847
@dbus.service.signal(_interface, signature=u"s")
464
@dbus.service.signal(_interface, signature="s")
848
465
def CheckerStarted(self, command):
849
466
"D-Bus signal"
850
467
pass
851
468
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
852
513
# PropertyChanged - signal
853
@dbus.service.signal(_interface, signature=u"sv")
514
@dbus.service.signal(_interface, signature="sv")
854
515
def PropertyChanged(self, property, value):
855
516
"D-Bus signal"
856
517
pass
857
518
858
# GotSecret - signal
859
@dbus.service.signal(_interface)
860
def GotSecret(self):
861
"""D-Bus signal
862
Is sent after a successful transfer of secret from the Mandos
863
server to mandos-client
864
"""
865
pass
866
867
# Rejected - signal
868
@dbus.service.signal(_interface, signature=u"s")
869
def Rejected(self, reason):
870
"D-Bus signal"
871
pass
872
873
# NeedApproval - signal
874
@dbus.service.signal(_interface, signature=u"db")
875
def NeedApproval(self, timeout, default):
876
"D-Bus signal"
877
pass
878
879
## Methods
880
881
# Approve - method
882
@dbus.service.method(_interface, in_signature=u"b")
883
def Approve(self, value):
884
self.approve(value)
885
886
# CheckedOK - method
887
@dbus.service.method(_interface)
888
def CheckedOK(self):
889
return self.checked_ok()
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)))
890
562
891
563
# Enable - method
892
@dbus.service.method(_interface)
893
def Enable(self):
894
"D-Bus method"
895
self.enable()
564
Enable = dbus.service.method(_interface)(enable)
565
Enable.__name__ = "Enable"
896
566
897
567
# StartChecker - method
898
568
@dbus.service.method(_interface)
907
577
self.disable()
908
578
909
579
# StopChecker - method
910
@dbus.service.method(_interface)
911
def StopChecker(self):
912
self.stop_checker()
913
914
## Properties
915
916
# approved_pending - property
917
@dbus_service_property(_interface, signature=u"b", access=u"read")
918
def approved_pending_dbus_property(self):
919
return dbus.Boolean(bool(self.approvals_pending))
920
921
# approved_by_default - property
922
@dbus_service_property(_interface, signature=u"b",
923
access=u"readwrite")
924
def approved_by_default_dbus_property(self):
925
return dbus.Boolean(self.approved_by_default)
926
927
# approved_delay - property
928
@dbus_service_property(_interface, signature=u"t",
929
access=u"readwrite")
930
def approved_delay_dbus_property(self):
931
return dbus.UInt64(self.approved_delay_milliseconds())
932
933
# approved_duration - property
934
@dbus_service_property(_interface, signature=u"t",
935
access=u"readwrite")
936
def approved_duration_dbus_property(self):
937
return dbus.UInt64(self._timedelta_to_milliseconds(
938
self.approved_duration))
939
940
# name - property
941
@dbus_service_property(_interface, signature=u"s", access=u"read")
942
def name_dbus_property(self):
943
return dbus.String(self.name)
944
945
# fingerprint - property
946
@dbus_service_property(_interface, signature=u"s", access=u"read")
947
def fingerprint_dbus_property(self):
948
return dbus.String(self.fingerprint)
949
950
# host - property
951
@dbus_service_property(_interface, signature=u"s",
952
access=u"readwrite")
953
def host_dbus_property(self, value=None):
954
if value is None: # get
955
return dbus.String(self.host)
956
self.host = value
957
# Emit D-Bus signal
958
self.PropertyChanged(dbus.String(u"host"),
959
dbus.String(value, variant_level=1))
960
961
# created - property
962
@dbus_service_property(_interface, signature=u"s", access=u"read")
963
def created_dbus_property(self):
964
return dbus.String(self._datetime_to_dbus(self.created))
965
966
# last_enabled - property
967
@dbus_service_property(_interface, signature=u"s", access=u"read")
968
def last_enabled_dbus_property(self):
969
if self.last_enabled is None:
970
return dbus.String(u"")
971
return dbus.String(self._datetime_to_dbus(self.last_enabled))
972
973
# enabled - property
974
@dbus_service_property(_interface, signature=u"b",
975
access=u"readwrite")
976
def enabled_dbus_property(self, value=None):
977
if value is None: # get
978
return dbus.Boolean(self.enabled)
979
if value:
980
self.enable()
981
else:
982
self.disable()
983
984
# last_checked_ok - property
985
@dbus_service_property(_interface, signature=u"s",
986
access=u"readwrite")
987
def last_checked_ok_dbus_property(self, value=None):
988
if value is not None:
989
self.checked_ok()
990
return
991
if self.last_checked_ok is None:
992
return dbus.String(u"")
993
return dbus.String(self._datetime_to_dbus(self
994
.last_checked_ok))
995
996
# timeout - property
997
@dbus_service_property(_interface, signature=u"t",
998
access=u"readwrite")
999
def timeout_dbus_property(self, value=None):
1000
if value is None: # get
1001
return dbus.UInt64(self.timeout_milliseconds())
1002
self.timeout = datetime.timedelta(0, 0, 0, value)
1003
# Emit D-Bus signal
1004
self.PropertyChanged(dbus.String(u"timeout"),
1005
dbus.UInt64(value, variant_level=1))
1006
if getattr(self, u"disable_initiator_tag", None) is None:
1007
return
1008
# Reschedule timeout
1009
gobject.source_remove(self.disable_initiator_tag)
1010
self.disable_initiator_tag = None
1011
time_to_die = (self.
1012
_timedelta_to_milliseconds((self
1013
.last_checked_ok
1014
+ self.timeout)
1015
- datetime.datetime
1016
.utcnow()))
1017
if time_to_die <= 0:
1018
# The timeout has passed
1019
self.disable()
1020
else:
1021
self.disable_initiator_tag = (gobject.timeout_add
1022
(time_to_die, self.disable))
1023
1024
# interval - property
1025
@dbus_service_property(_interface, signature=u"t",
1026
access=u"readwrite")
1027
def interval_dbus_property(self, value=None):
1028
if value is None: # get
1029
return dbus.UInt64(self.interval_milliseconds())
1030
self.interval = datetime.timedelta(0, 0, 0, value)
1031
# Emit D-Bus signal
1032
self.PropertyChanged(dbus.String(u"interval"),
1033
dbus.UInt64(value, variant_level=1))
1034
if getattr(self, u"checker_initiator_tag", None) is None:
1035
return
1036
# Reschedule checker run
1037
gobject.source_remove(self.checker_initiator_tag)
1038
self.checker_initiator_tag = (gobject.timeout_add
1039
(value, self.start_checker))
1040
self.start_checker() # Start one now, too
1041
1042
# checker - property
1043
@dbus_service_property(_interface, signature=u"s",
1044
access=u"readwrite")
1045
def checker_dbus_property(self, value=None):
1046
if value is None: # get
1047
return dbus.String(self.checker_command)
1048
self.checker_command = value
1049
# Emit D-Bus signal
1050
self.PropertyChanged(dbus.String(u"checker"),
1051
dbus.String(self.checker_command,
1052
variant_level=1))
1053
1054
# checker_running - property
1055
@dbus_service_property(_interface, signature=u"b",
1056
access=u"readwrite")
1057
def checker_running_dbus_property(self, value=None):
1058
if value is None: # get
1059
return dbus.Boolean(self.checker is not None)
1060
if value:
1061
self.start_checker()
1062
else:
1063
self.stop_checker()
1064
1065
# object_path - property
1066
@dbus_service_property(_interface, signature=u"o", access=u"read")
1067
def object_path_dbus_property(self):
1068
return self.dbus_object_path # is already a dbus.ObjectPath
1069
1070
# secret = property
1071
@dbus_service_property(_interface, signature=u"ay",
1072
access=u"write", byte_arrays=True)
1073
def secret_dbus_property(self, value):
1074
self.secret = str(value)
580
StopChecker = dbus.service.method(_interface)(stop_checker)
581
StopChecker.__name__ = "StopChecker"
1075
582
1076
583
del _interface
1077
584
1078
585
1079
class ProxyClient(object):
1080
def __init__(self, child_pipe, fpr, address):
1081
self._pipe = child_pipe
1082
self._pipe.send(('init', fpr, address))
1083
if not self._pipe.recv():
1084
raise KeyError()
1085
1086
def __getattribute__(self, name):
1087
if(name == '_pipe'):
1088
return super(ProxyClient, self).__getattribute__(name)
1089
self._pipe.send(('getattr', name))
1090
data = self._pipe.recv()
1091
if data[0] == 'data':
1092
return data[1]
1093
if data[0] == 'function':
1094
def func(*args, **kwargs):
1095
self._pipe.send(('funcall', name, args, kwargs))
1096
return self._pipe.recv()[1]
1097
return func
1098
1099
def __setattr__(self, name, value):
1100
if(name == '_pipe'):
1101
return super(ProxyClient, self).__setattr__(name, value)
1102
self._pipe.send(('setattr', name, value))
1103
1104
1105
class ClientHandler(socketserver.BaseRequestHandler, object):
1106
"""A class to handle client connections.
1107
1108
Instantiated once for each connection to handle it.
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.
1109
647
Note: This will run in its own forked process."""
1110
648
1111
649
def handle(self):
1112
with contextlib.closing(self.server.child_pipe) as child_pipe:
1113
logger.info(u"TCP connection from: %s",
1114
unicode(self.client_address))
1115
logger.debug(u"Pipe FD: %d",
1116
self.server.child_pipe.fileno())
1117
1118
session = (gnutls.connection
1119
.ClientSession(self.request,
1120
gnutls.connection
1121
.X509Credentials()))
1122
1123
# Note: gnutls.connection.X509Credentials is really a
1124
# generic GnuTLS certificate credentials object so long as
1125
# no X.509 keys are added to it. Therefore, we can use it
1126
# here despite using OpenPGP certificates.
1127
1128
#priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
1129
# u"+AES-256-CBC", u"+SHA1",
1130
# u"+COMP-NULL", u"+CTYPE-OPENPGP",
1131
# u"+DHE-DSS"))
1132
# Use a fallback default, since this MUST be set.
1133
priority = self.server.gnutls_priority
1134
if priority is None:
1135
priority = u"NORMAL"
1136
(gnutls.library.functions
1137
.gnutls_priority_set_direct(session._c_object,
1138
priority, None))
1139
1140
# Start communication using the Mandos protocol
1141
# Get protocol number
1142
line = self.request.makefile().readline()
1143
logger.debug(u"Protocol version: %r", line)
1144
try:
1145
if int(line.strip().split()[0]) > 1:
1146
raise RuntimeError
1147
except (ValueError, IndexError, RuntimeError), error:
1148
logger.error(u"Unknown protocol version: %s", error)
1149
return
1150
1151
# Start GnuTLS connection
1152
try:
1153
session.handshake()
1154
except gnutls.errors.GNUTLSError, error:
1155
logger.warning(u"Handshake failed: %s", error)
1156
# Do not run session.bye() here: the session is not
1157
# established. Just abandon the request.
1158
return
1159
logger.debug(u"Handshake succeeded")
1160
1161
approval_required = False
1162
try:
1163
try:
1164
fpr = self.fingerprint(self.peer_certificate
1165
(session))
1166
except (TypeError, gnutls.errors.GNUTLSError), error:
1167
logger.warning(u"Bad certificate: %s", error)
1168
return
1169
logger.debug(u"Fingerprint: %s", fpr)
1170
1171
try:
1172
client = ProxyClient(child_pipe, fpr,
1173
self.client_address)
1174
except KeyError:
1175
return
1176
1177
if client.approved_delay:
1178
delay = client.approved_delay
1179
client.approvals_pending += 1
1180
approval_required = True
1181
1182
while True:
1183
if not client.enabled:
1184
logger.warning(u"Client %s is disabled",
1185
client.name)
1186
if self.server.use_dbus:
1187
# Emit D-Bus signal
1188
client.Rejected("Disabled")
1189
return
1190
1191
if client._approved or not client.approved_delay:
1192
#We are approved or approval is disabled
1193
break
1194
elif client._approved is None:
1195
logger.info(u"Client %s need approval",
1196
client.name)
1197
if self.server.use_dbus:
1198
# Emit D-Bus signal
1199
client.NeedApproval(
1200
client.approved_delay_milliseconds(),
1201
client.approved_by_default)
1202
else:
1203
logger.warning(u"Client %s was not approved",
1204
client.name)
1205
if self.server.use_dbus:
1206
# Emit D-Bus signal
1207
client.Rejected("Disapproved")
1208
return
1209
1210
#wait until timeout or approved
1211
#x = float(client._timedelta_to_milliseconds(delay))
1212
time = datetime.datetime.now()
1213
client.changedstate.acquire()
1214
client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))
1215
client.changedstate.release()
1216
time2 = datetime.datetime.now()
1217
if (time2 - time) >= delay:
1218
if not client.approved_by_default:
1219
logger.warning("Client %s timed out while"
1220
" waiting for approval",
1221
client.name)
1222
if self.server.use_dbus:
1223
# Emit D-Bus signal
1224
client.Rejected("Time out")
1225
return
1226
else:
1227
break
1228
else:
1229
delay -= time2 - time
1230
1231
sent_size = 0
1232
while sent_size < len(client.secret):
1233
try:
1234
sent = session.send(client.secret[sent_size:])
1235
except (gnutls.errors.GNUTLSError), error:
1236
logger.warning("gnutls send failed")
1237
return
1238
logger.debug(u"Sent: %d, remaining: %d",
1239
sent, len(client.secret)
1240
- (sent_size + sent))
1241
sent_size += sent
1242
1243
logger.info(u"Sending secret to %s", client.name)
1244
# bump the timeout as if seen
1245
client.checked_ok()
1246
if self.server.use_dbus:
1247
# Emit D-Bus signal
1248
client.GotSecret()
1249
1250
finally:
1251
if approval_required:
1252
client.approvals_pending -= 1
1253
try:
1254
session.bye()
1255
except (gnutls.errors.GNUTLSError), error:
1256
logger.warning("gnutls bye failed")
1257
1258
@staticmethod
1259
def peer_certificate(session):
1260
"Return the peer's OpenPGP certificate as a bytestring"
1261
# If not an OpenPGP certificate...
1262
if (gnutls.library.functions
1263
.gnutls_certificate_type_get(session._c_object)
1264
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1265
# ...do the normal thing
1266
return session.peer_certificate
1267
list_size = ctypes.c_uint(1)
1268
cert_list = (gnutls.library.functions
1269
.gnutls_certificate_get_peers
1270
(session._c_object, ctypes.byref(list_size)))
1271
if not bool(cert_list) and list_size.value != 0:
1272
raise gnutls.errors.GNUTLSError(u"error getting peer"
1273
u" certificate")
1274
if list_size.value == 0:
1275
return None
1276
cert = cert_list[0]
1277
return ctypes.string_at(cert.data, cert.size)
1278
1279
@staticmethod
1280
def fingerprint(openpgp):
1281
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1282
# New GnuTLS "datum" with the OpenPGP public key
1283
datum = (gnutls.library.types
1284
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1285
ctypes.POINTER
1286
(ctypes.c_ubyte)),
1287
ctypes.c_uint(len(openpgp))))
1288
# New empty GnuTLS certificate
1289
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1290
(gnutls.library.functions
1291
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1292
# Import the OpenPGP public key into the certificate
1293
(gnutls.library.functions
1294
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1295
gnutls.library.constants
1296
.GNUTLS_OPENPGP_FMT_RAW))
1297
# Verify the self signature in the key
1298
crtverify = ctypes.c_uint()
1299
(gnutls.library.functions
1300
.gnutls_openpgp_crt_verify_self(crt, 0,
1301
ctypes.byref(crtverify)))
1302
if crtverify.value != 0:
1303
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1304
raise (gnutls.errors.CertificateSecurityError
1305
(u"Verify failed"))
1306
# New buffer for the fingerprint
1307
buf = ctypes.create_string_buffer(20)
1308
buf_len = ctypes.c_size_t()
1309
# Get the fingerprint from the certificate into the buffer
1310
(gnutls.library.functions
1311
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1312
ctypes.byref(buf_len)))
1313
# Deinit the certificate
1314
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1315
# Convert the buffer to a Python bytestring
1316
fpr = ctypes.string_at(buf, buf_len.value)
1317
# Convert the bytestring to hexadecimal notation
1318
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
1319
return hex_fpr
1320
1321
1322
class MultiprocessingMixIn(object):
1323
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1324
def sub_process_main(self, request, address):
1325
try:
1326
self.finish_request(request, address)
1327
except:
1328
self.handle_error(request, address)
1329
self.close_request(request)
1330
1331
def process_request(self, request, address):
1332
"""Start a new process to process the request."""
1333
multiprocessing.Process(target = self.sub_process_main,
1334
args = (request, address)).start()
1335
1336
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1337
""" adds a pipe to the MixIn """
1338
def process_request(self, request, client_address):
1339
"""Overrides and wraps the original process_request().
1340
1341
This function creates a new pipe in self.pipe
1342
"""
1343
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1344
1345
super(MultiprocessingMixInWithPipe,
1346
self).process_request(request, client_address)
1347
self.child_pipe.close()
1348
self.add_pipe(parent_pipe)
1349
1350
def add_pipe(self, parent_pipe):
1351
"""Dummy function; override as necessary"""
1352
pass
1353
1354
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1355
socketserver.TCPServer, object):
1356
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1357
650
logger.info(u"TCP connection from: %s",
651
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.
1358
726
Attributes:
727
settings: Server settings
728
clients: Set() of Client objects
1359
729
enabled: Boolean; whether this server is activated yet
1360
interface: None or a network interface name (string)
1361
use_ipv6: Boolean; to use IPv6 or not
1362
730
"""
1363
def __init__(self, server_address, RequestHandlerClass,
1364
interface=None, use_ipv6=True):
1365
self.interface = interface
1366
if use_ipv6:
1367
self.address_family = socket.AF_INET6
1368
socketserver.TCPServer.__init__(self, server_address,
1369
RequestHandlerClass)
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)
1370
741
def server_bind(self):
1371
742
"""This overrides the normal server_bind() function
1372
743
to bind to an interface if one was specified, and also NOT to
1373
744
bind to an address or port if they were not specified."""
1374
if self.interface is not None:
1375
if SO_BINDTODEVICE is None:
1376
logger.error(u"SO_BINDTODEVICE does not exist;"
1377
u" cannot bind to interface %s",
1378
self.interface)
1379
else:
1380
try:
1381
self.socket.setsockopt(socket.SOL_SOCKET,
1382
SO_BINDTODEVICE,
1383
str(self.interface
1384
+ u'\0'))
1385
except socket.error, error:
1386
if error[0] == errno.EPERM:
1387
logger.error(u"No permission to"
1388
u" bind to interface %s",
1389
self.interface)
1390
elif error[0] == errno.ENOPROTOOPT:
1391
logger.error(u"SO_BINDTODEVICE not available;"
1392
u" cannot bind to interface %s",
1393
self.interface)
1394
else:
1395
raise
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
1396
759
# Only bind(2) the socket if we really need to.
1397
760
if self.server_address[0] or self.server_address[1]:
1398
761
if not self.server_address[0]:
1399
if self.address_family == socket.AF_INET6:
1400
any_address = u"::" # in6addr_any
1401
else:
1402
any_address = socket.INADDR_ANY
1403
self.server_address = (any_address,
762
in6addr_any = "::"
763
self.server_address = (in6addr_any,
1404
764
self.server_address[1])
1405
765
elif not self.server_address[1]:
1406
766
self.server_address = (self.server_address[0],
1407
767
0)
1408
# if self.interface:
768
# if self.settings["interface"]:
1409
769
# self.server_address = (self.server_address[0],
1410
770
# 0, # port
1411
771
# 0, # flowinfo
1412
772
# if_nametoindex
1413
# (self.interface))
1414
return socketserver.TCPServer.server_bind(self)
1415
1416
1417
class MandosServer(IPv6_TCPServer):
1418
"""Mandos server.
1419
1420
Attributes:
1421
clients: set of Client objects
1422
gnutls_priority GnuTLS priority string
1423
use_dbus: Boolean; to emit D-Bus signals or not
1424
1425
Assumes a gobject.MainLoop event loop.
1426
"""
1427
def __init__(self, server_address, RequestHandlerClass,
1428
interface=None, use_ipv6=True, clients=None,
1429
gnutls_priority=None, use_dbus=True):
1430
self.enabled = False
1431
self.clients = clients
1432
if self.clients is None:
1433
self.clients = set()
1434
self.use_dbus = use_dbus
1435
self.gnutls_priority = gnutls_priority
1436
IPv6_TCPServer.__init__(self, server_address,
1437
RequestHandlerClass,
1438
interface = interface,
1439
use_ipv6 = use_ipv6)
773
# (self.settings
774
# ["interface"]))
775
return super(IPv6_TCPServer, self).server_bind()
1440
776
def server_activate(self):
1441
777
if self.enabled:
1442
return socketserver.TCPServer.server_activate(self)
778
return super(IPv6_TCPServer, self).server_activate()
1443
779
def enable(self):
1444
780
self.enabled = True
1445
def add_pipe(self, parent_pipe):
1446
# Call "handle_ipc" for both data and EOF events
1447
gobject.io_add_watch(parent_pipe.fileno(),
1448
gobject.IO_IN | gobject.IO_HUP,
1449
functools.partial(self.handle_ipc,
1450
parent_pipe = parent_pipe))
1451
1452
def handle_ipc(self, source, condition, parent_pipe=None,
1453
client_object=None):
1454
condition_names = {
1455
gobject.IO_IN: u"IN", # There is data to read.
1456
gobject.IO_OUT: u"OUT", # Data can be written (without
1457
# blocking).
1458
gobject.IO_PRI: u"PRI", # There is urgent data to read.
1459
gobject.IO_ERR: u"ERR", # Error condition.
1460
gobject.IO_HUP: u"HUP" # Hung up (the connection has been
1461
# broken, usually for pipes and
1462
# sockets).
1463
}
1464
conditions_string = ' | '.join(name
1465
for cond, name in
1466
condition_names.iteritems()
1467
if cond & condition)
1468
logger.debug(u"Handling IPC: FD = %d, condition = %s", source,
1469
conditions_string)
1470
1471
# error or the other end of multiprocessing.Pipe has closed
1472
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
1473
return False
1474
1475
# Read a request from the child
1476
request = parent_pipe.recv()
1477
logger.debug(u"IPC request: %s", repr(request))
1478
command = request[0]
1479
1480
if command == 'init':
1481
fpr = request[1]
1482
address = request[2]
1483
1484
for c in self.clients:
1485
if c.fingerprint == fpr:
1486
client = c
1487
break
1488
else:
1489
logger.warning(u"Client not found for fingerprint: %s, ad"
1490
u"dress: %s", fpr, address)
1491
if self.use_dbus:
1492
# Emit D-Bus signal
1493
mandos_dbus_service.ClientNotFound(fpr, address)
1494
parent_pipe.send(False)
1495
return False
1496
1497
gobject.io_add_watch(parent_pipe.fileno(),
1498
gobject.IO_IN | gobject.IO_HUP,
1499
functools.partial(self.handle_ipc,
1500
parent_pipe = parent_pipe,
1501
client_object = client))
1502
parent_pipe.send(True)
1503
# remove the old hook in favor of the new above hook on same fileno
1504
return False
1505
if command == 'funcall':
1506
funcname = request[1]
1507
args = request[2]
1508
kwargs = request[3]
1509
1510
parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))
1511
1512
if command == 'getattr':
1513
attrname = request[1]
1514
if callable(client_object.__getattribute__(attrname)):
1515
parent_pipe.send(('function',))
1516
else:
1517
parent_pipe.send(('data', client_object.__getattribute__(attrname)))
1518
1519
if command == 'setattr':
1520
attrname = request[1]
1521
value = request[2]
1522
setattr(client_object, attrname, value)
1523
1524
return True
1525
781
1526
782
1527
783
def string_to_delta(interval):
1528
784
"""Parse a string and return a datetime.timedelta
1529
1530
>>> string_to_delta(u'7d')
785
786
>>> string_to_delta('7d')
1531
787
datetime.timedelta(7)
1532
>>> string_to_delta(u'60s')
788
>>> string_to_delta('60s')
1533
789
datetime.timedelta(0, 60)
1534
>>> string_to_delta(u'60m')
790
>>> string_to_delta('60m')
1535
791
datetime.timedelta(0, 3600)
1536
>>> string_to_delta(u'24h')
792
>>> string_to_delta('24h')
1537
793
datetime.timedelta(1)
1538
794
>>> string_to_delta(u'1w')
1539
795
datetime.timedelta(7)
1540
>>> string_to_delta(u'5m 30s')
796
>>> string_to_delta('5m 30s')
1541
797
datetime.timedelta(0, 330)
1542
798
"""
1543
799
timevalue = datetime.timedelta(0)
1556
812
elif suffix == u"w":
1557
813
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1558
814
else:
1559
raise ValueError(u"Unknown suffix %r" % suffix)
1560
except (ValueError, IndexError), e:
1561
raise ValueError(e.message)
815
raise ValueError
816
except (ValueError, IndexError):
817
raise ValueError
1562
818
timevalue += delta
1563
819
return timevalue
1564
820
1565
821
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
1566
845
def if_nametoindex(interface):
1567
"""Call the C function if_nametoindex(), or equivalent
1568
1569
Note: This function cannot accept a unicode string."""
846
"""Call the C function if_nametoindex(), or equivalent"""
1570
847
global if_nametoindex
1571
848
try:
1572
849
if_nametoindex = (ctypes.cdll.LoadLibrary
1573
(ctypes.util.find_library(u"c"))
850
(ctypes.util.find_library("c"))
1574
851
.if_nametoindex)
1575
852
except (OSError, AttributeError):
1576
logger.warning(u"Doing if_nametoindex the hard way")
853
if "struct" not in sys.modules:
854
import struct
855
if "fcntl" not in sys.modules:
856
import fcntl
1577
857
def if_nametoindex(interface):
1578
858
"Get an interface index the hard way, i.e. using fcntl()"
1579
859
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1580
with contextlib.closing(socket.socket()) as s:
860
with closing(socket.socket()) as s:
1581
861
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1582
struct.pack(str(u"16s16x"),
1583
interface))
1584
interface_index = struct.unpack(str(u"I"),
1585
ifreq[16:20])[0]
862
struct.pack("16s16x", interface))
863
interface_index = struct.unpack("I", ifreq[16:20])[0]
1586
864
return interface_index
1587
865
return if_nametoindex(interface)
1588
866
1589
867
1590
868
def daemon(nochdir = False, noclose = False):
1591
869
"""See daemon(3). Standard BSD Unix function.
1592
1593
870
This should really exist as os.daemon, but it doesn't (yet)."""
1594
871
if os.fork():
1595
872
sys.exit()
1596
873
os.setsid()
1597
874
if not nochdir:
1598
os.chdir(u"/")
875
os.chdir("/")
1599
876
if os.fork():
1600
877
sys.exit()
1601
878
if not noclose:
1603
880
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1604
881
if not stat.S_ISCHR(os.fstat(null).st_mode):
1605
882
raise OSError(errno.ENODEV,
1606
u"%s not a character device"
1607
% os.path.devnull)
883
"/dev/null not a character device")
1608
884
os.dup2(null, sys.stdin.fileno())
1609
885
os.dup2(null, sys.stdout.fileno())
1610
886
os.dup2(null, sys.stderr.fileno())
1613
889
1614
890
1615
891
def main():
1616
1617
##################################################################
1618
# Parsing of options, both command line and config file
1619
1620
892
parser = optparse.OptionParser(version = "%%prog %s" % version)
1621
parser.add_option("-i", u"--interface", type=u"string",
1622
metavar="IF", help=u"Bind to interface IF")
1623
parser.add_option("-a", u"--address", type=u"string",
1624
help=u"Address to listen for requests on")
1625
parser.add_option("-p", u"--port", type=u"int",
1626
help=u"Port number to receive requests on")
1627
parser.add_option("--check", action=u"store_true",
1628
help=u"Run self-test")
1629
parser.add_option("--debug", action=u"store_true",
1630
help=u"Debug mode; run in foreground and log to"
1631
u" terminal")
1632
parser.add_option("--debuglevel", type=u"string", metavar="Level",
1633
help=u"Debug level for stdout output")
1634
parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1635
u" priority string (see GnuTLS documentation)")
1636
parser.add_option("--servicename", type=u"string",
1637
metavar=u"NAME", help=u"Zeroconf service name")
1638
parser.add_option("--configdir", type=u"string",
1639
default=u"/etc/mandos", metavar=u"DIR",
1640
help=u"Directory to search for configuration"
1641
u" files")
1642
parser.add_option("--no-dbus", action=u"store_false",
1643
dest=u"use_dbus", help=u"Do not provide D-Bus"
1644
u" system bus interface")
1645
parser.add_option("--no-ipv6", action=u"store_false",
1646
dest=u"use_ipv6", help=u"Do not use IPv6")
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")
1647
916
options = parser.parse_args()[0]
1648
917
1649
918
if options.check:
1652
921
sys.exit()
1653
922
1654
923
# Default values for config file for server-global settings
1655
server_defaults = { u"interface": u"",
1656
u"address": u"",
1657
u"port": u"",
1658
u"debug": u"False",
1659
u"priority":
1660
u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1661
u"servicename": u"Mandos",
1662
u"use_dbus": u"True",
1663
u"use_ipv6": u"True",
1664
u"debuglevel": u"",
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",
1665
932
}
1666
933
1667
934
# Parse config file for server-global settings
1668
server_config = configparser.SafeConfigParser(server_defaults)
935
server_config = ConfigParser.SafeConfigParser(server_defaults)
1669
936
del server_defaults
1670
server_config.read(os.path.join(options.configdir,
1671
u"mandos.conf"))
937
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1672
938
# Convert the SafeConfigParser object to a dict
1673
939
server_settings = server_config.defaults()
1674
# Use the appropriate methods on the non-string config options
1675
for option in (u"debug", u"use_dbus", u"use_ipv6"):
1676
server_settings[option] = server_config.getboolean(u"DEFAULT",
1677
option)
1678
if server_settings["port"]:
1679
server_settings["port"] = server_config.getint(u"DEFAULT",
1680
u"port")
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"))
1681
945
del server_config
1682
946
1683
947
# Override the settings from the config file with command line
1684
948
# options, if set.
1685
for option in (u"interface", u"address", u"port", u"debug",
1686
u"priority", u"servicename", u"configdir",
1687
u"use_dbus", u"use_ipv6", u"debuglevel"):
949
for option in ("interface", "address", "port", "debug",
950
"priority", "servicename", "configdir",
951
"use_dbus"):
1688
952
value = getattr(options, option)
1689
953
if value is not None:
1690
954
server_settings[option] = value
1691
955
del options
1692
# Force all strings to be unicode
1693
for option in server_settings.keys():
1694
if type(server_settings[option]) is str:
1695
server_settings[option] = unicode(server_settings[option])
1696
956
# Now we have our good server settings in "server_settings"
1697
957
1698
##################################################################
1699
1700
958
# For convenience
1701
debug = server_settings[u"debug"]
1702
debuglevel = server_settings[u"debuglevel"]
1703
use_dbus = server_settings[u"use_dbus"]
1704
use_ipv6 = server_settings[u"use_ipv6"]
1705
1706
if server_settings[u"servicename"] != u"Mandos":
959
debug = server_settings["debug"]
960
use_dbus = server_settings["use_dbus"]
961
962
if not debug:
963
syslogger.setLevel(logging.WARNING)
964
console.setLevel(logging.WARNING)
965
966
if server_settings["servicename"] != "Mandos":
1707
967
syslogger.setFormatter(logging.Formatter
1708
(u'Mandos (%s) [%%(process)d]:'
1709
u' %%(levelname)s: %%(message)s'
1710
% server_settings[u"servicename"]))
968
('Mandos (%s): %%(levelname)s:'
969
' %%(message)s'
970
% server_settings["servicename"]))
1711
971
1712
972
# Parse config file with clients
1713
client_defaults = { u"timeout": u"1h",
1714
u"interval": u"5m",
1715
u"checker": u"fping -q -- %%(host)s",
1716
u"host": u"",
1717
u"approved_delay": u"0s",
1718
u"approved_duration": u"1s",
973
client_defaults = { "timeout": "1h",
974
"interval": "5m",
975
"checker": "fping -q -- %%(host)s",
976
"host": "",
1719
977
}
1720
client_config = configparser.SafeConfigParser(client_defaults)
1721
client_config.read(os.path.join(server_settings[u"configdir"],
1722
u"clients.conf"))
1723
1724
global mandos_dbus_service
1725
mandos_dbus_service = None
1726
1727
tcp_server = MandosServer((server_settings[u"address"],
1728
server_settings[u"port"]),
1729
ClientHandler,
1730
interface=server_settings[u"interface"],
1731
use_ipv6=use_ipv6,
1732
gnutls_priority=
1733
server_settings[u"priority"],
1734
use_dbus=use_dbus)
1735
pidfilename = u"/var/run/mandos.pid"
1736
try:
1737
pidfile = open(pidfilename, u"w")
1738
except IOError:
1739
logger.error(u"Could not open file %r", pidfilename)
1740
1741
try:
1742
uid = pwd.getpwnam(u"_mandos").pw_uid
1743
gid = pwd.getpwnam(u"_mandos").pw_gid
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
996
gid = pwd.getpwnam("_mandos").pw_gid
1744
997
except KeyError:
1745
998
try:
1746
uid = pwd.getpwnam(u"mandos").pw_uid
1747
gid = pwd.getpwnam(u"mandos").pw_gid
999
uid = pwd.getpwnam("mandos").pw_uid
1000
gid = pwd.getpwnam("mandos").pw_gid
1748
1001
except KeyError:
1749
1002
try:
1750
uid = pwd.getpwnam(u"nobody").pw_uid
1751
gid = pwd.getpwnam(u"nobody").pw_gid
1003
uid = pwd.getpwnam("nobody").pw_uid
1004
gid = pwd.getpwnam("nogroup").pw_gid
1752
1005
except KeyError:
1753
1006
uid = 65534
1754
1007
gid = 65534
1755
1008
try:
1009
os.setuid(uid)
1756
1010
os.setgid(gid)
1757
os.setuid(uid)
1758
1011
except OSError, error:
1759
1012
if error[0] != errno.EPERM:
1760
1013
raise error
1761
1014
1762
# Enable all possible GnuTLS debugging
1763
1764
1765
if not debug and not debuglevel:
1766
syslogger.setLevel(logging.WARNING)
1767
console.setLevel(logging.WARNING)
1768
if debuglevel:
1769
level = getattr(logging, debuglevel.upper())
1770
syslogger.setLevel(level)
1771
console.setLevel(level)
1772
1773
if debug:
1774
# "Use a log level over 10 to enable all debugging options."
1775
# - GnuTLS manual
1776
gnutls.library.functions.gnutls_global_set_log_level(11)
1777
1778
@gnutls.library.types.gnutls_log_func
1779
def debug_gnutls(level, string):
1780
logger.debug(u"GnuTLS: %s", string[:-1])
1781
1782
(gnutls.library.functions
1783
.gnutls_global_set_log_function(debug_gnutls))
1784
1785
# Redirect stdin so all checkers get /dev/null
1786
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1787
os.dup2(null, sys.stdin.fileno())
1788
if null > 2:
1789
os.close(null)
1790
else:
1791
# No console logging
1792
logger.removeHandler(console)
1793
1015
global service
1016
service = AvahiService(name = server_settings["servicename"],
1017
servicetype = "_mandos._tcp", )
1018
if server_settings["interface"]:
1019
service.interface = (if_nametoindex
1020
(server_settings["interface"]))
1794
1021
1795
1022
global main_loop
1023
global bus
1024
global server
1796
1025
# From the Avahi example code
1797
1026
DBusGMainLoop(set_as_default=True )
1798
1027
main_loop = gobject.MainLoop()
1799
1028
bus = dbus.SystemBus()
1029
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
1030
avahi.DBUS_PATH_SERVER),
1031
avahi.DBUS_INTERFACE_SERVER)
1800
1032
# End of Avahi example code
1801
1033
if use_dbus:
1802
try:
1803
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos",
1804
bus, do_not_queue=True)
1805
except dbus.exceptions.NameExistsException, e:
1806
logger.error(unicode(e) + u", disabling D-Bus")
1807
use_dbus = False
1808
server_settings[u"use_dbus"] = False
1809
tcp_server.use_dbus = False
1810
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1811
service = AvahiService(name = server_settings[u"servicename"],
1812
servicetype = u"_mandos._tcp",
1813
protocol = protocol, bus = bus)
1814
if server_settings["interface"]:
1815
service.interface = (if_nametoindex
1816
(str(server_settings[u"interface"])))
1817
1818
if not debug:
1034
bus_name = dbus.service.BusName(u"org.mandos-system.Mandos",
1035
bus)
1036
1037
clients.update(Set(Client(name = section,
1038
config
1039
= dict(client_config.items(section)),
1040
use_dbus = use_dbus)
1041
for section in client_config.sections()))
1042
if not clients:
1043
logger.warning(u"No clients defined")
1044
1045
if debug:
1046
# Redirect stdin so all checkers get /dev/null
1047
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1048
os.dup2(null, sys.stdin.fileno())
1049
if null > 2:
1050
os.close(null)
1051
else:
1052
# No console logging
1053
logger.removeHandler(console)
1819
1054
# Close all input and output, do double fork, etc.
1820
1055
daemon()
1821
1822
global multiprocessing_manager
1823
multiprocessing_manager = multiprocessing.Manager()
1824
1825
client_class = Client
1826
if use_dbus:
1827
client_class = functools.partial(ClientDBus, bus = bus)
1828
def client_config_items(config, section):
1829
special_settings = {
1830
"approved_by_default":
1831
lambda: config.getboolean(section,
1832
"approved_by_default"),
1833
}
1834
for name, value in config.items(section):
1835
try:
1836
yield (name, special_settings[name]())
1837
except KeyError:
1838
yield (name, value)
1839
1840
tcp_server.clients.update(set(
1841
client_class(name = section,
1842
config= dict(client_config_items(
1843
client_config, section)))
1844
for section in client_config.sections()))
1845
if not tcp_server.clients:
1846
logger.warning(u"No clients defined")
1847
1056
1848
1057
try:
1849
with pidfile:
1850
pid = os.getpid()
1851
pidfile.write(str(pid) + "\n")
1058
pid = os.getpid()
1059
pidfile.write(str(pid) + "\n")
1060
pidfile.close()
1852
1061
del pidfile
1853
1062
except IOError:
1854
1063
logger.error(u"Could not write to file %r with PID %d",
1858
1067
pass
1859
1068
del pidfilename
1860
1069
1070
def cleanup():
1071
"Cleanup function; run on exit"
1072
global group
1073
# From the Avahi example code
1074
if not group is None:
1075
group.Free()
1076
group = None
1077
# End of Avahi example code
1078
1079
while clients:
1080
client = clients.pop()
1081
client.disable_hook = None
1082
client.disable()
1083
1084
atexit.register(cleanup)
1085
1861
1086
if not debug:
1862
1087
signal.signal(signal.SIGINT, signal.SIG_IGN)
1863
1088
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1864
1089
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1865
1090
1866
1091
if use_dbus:
1867
class MandosDBusService(dbus.service.Object):
1092
class MandosServer(dbus.service.Object):
1868
1093
"""A D-Bus proxy object"""
1869
1094
def __init__(self):
1870
dbus.service.Object.__init__(self, bus, u"/")
1871
_interface = u"se.bsnet.fukt.Mandos"
1872
1873
@dbus.service.signal(_interface, signature=u"o")
1874
def ClientAdded(self, objpath):
1875
"D-Bus signal"
1876
pass
1877
1878
@dbus.service.signal(_interface, signature=u"ss")
1879
def ClientNotFound(self, fingerprint, address):
1880
"D-Bus signal"
1881
pass
1882
1883
@dbus.service.signal(_interface, signature=u"os")
1884
def ClientRemoved(self, objpath, name):
1885
"D-Bus signal"
1886
pass
1887
1888
@dbus.service.method(_interface, out_signature=u"ao")
1095
dbus.service.Object.__init__(self, bus,
1096
"/Mandos")
1097
_interface = u"org.mandos_system.Mandos"
1098
1099
@dbus.service.signal(_interface, signature="oa{sv}")
1100
def ClientAdded(self, objpath, properties):
1101
"D-Bus signal"
1102
pass
1103
1104
@dbus.service.signal(_interface, signature="o")
1105
def ClientRemoved(self, objpath):
1106
"D-Bus signal"
1107
pass
1108
1109
@dbus.service.method(_interface, out_signature="ao")
1889
1110
def GetAllClients(self):
1890
"D-Bus method"
1891
return dbus.Array(c.dbus_object_path
1892
for c in tcp_server.clients)
1893
1894
@dbus.service.method(_interface,
1895
out_signature=u"a{oa{sv}}")
1111
return dbus.Array(c.dbus_object_path for c in clients)
1112
1113
@dbus.service.method(_interface, out_signature="a{oa{sv}}")
1896
1114
def GetAllClientsWithProperties(self):
1897
"D-Bus method"
1898
1115
return dbus.Dictionary(
1899
((c.dbus_object_path, c.GetAll(u""))
1900
for c in tcp_server.clients),
1901
signature=u"oa{sv}")
1902
1903
@dbus.service.method(_interface, in_signature=u"o")
1116
((c.dbus_object_path, c.GetAllProperties())
1117
for c in clients),
1118
signature="oa{sv}")
1119
1120
@dbus.service.method(_interface, in_signature="o")
1904
1121
def RemoveClient(self, object_path):
1905
"D-Bus method"
1906
for c in tcp_server.clients:
1122
for c in clients:
1907
1123
if c.dbus_object_path == object_path:
1908
tcp_server.clients.remove(c)
1909
c.remove_from_connection()
1124
clients.remove(c)
1910
1125
# Don't signal anything except ClientRemoved
1911
c.disable(quiet=True)
1126
c.use_dbus = False
1127
c.disable()
1912
1128
# Emit D-Bus signal
1913
self.ClientRemoved(object_path, c.name)
1129
self.ClientRemoved(object_path)
1914
1130
return
1915
raise KeyError(object_path)
1916
1131
raise KeyError
1132
@dbus.service.method(_interface)
1133
def Quit(self):
1134
main_loop.quit()
1135
1917
1136
del _interface
1918
1919
mandos_dbus_service = MandosDBusService()
1920
1921
def cleanup():
1922
"Cleanup function; run on exit"
1923
service.cleanup()
1924
1925
while tcp_server.clients:
1926
client = tcp_server.clients.pop()
1927
if use_dbus:
1928
client.remove_from_connection()
1929
client.disable_hook = None
1930
# Don't signal anything except ClientRemoved
1931
client.disable(quiet=True)
1932
if use_dbus:
1933
# Emit D-Bus signal
1934
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
1935
client.name)
1936
1937
atexit.register(cleanup)
1938
1939
for client in tcp_server.clients:
1137
1138
mandos_server = MandosServer()
1139
1140
for client in clients:
1940
1141
if use_dbus:
1941
1142
# Emit D-Bus signal
1942
mandos_dbus_service.ClientAdded(client.dbus_object_path)
1143
mandos_server.ClientAdded(client.dbus_object_path,
1144
client.GetAllProperties())
1943
1145
client.enable()
1944
1146
1945
1147
tcp_server.enable()
1947
1149
1948
1150
# Find out what port we got
1949
1151
service.port = tcp_server.socket.getsockname()[1]
1950
if use_ipv6:
1951
logger.info(u"Now listening on address %r, port %d,"
1952
" flowinfo %d, scope_id %d"
1953
% tcp_server.socket.getsockname())
1954
else: # IPv4
1955
logger.info(u"Now listening on address %r, port %d"
1956
% tcp_server.socket.getsockname())
1152
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
1153
u" scope_id %d" % tcp_server.socket.getsockname())
1957
1154
1958
1155
#service.interface = tcp_server.socket.getsockname()[3]
1959
1156
1960
1157
try:
1961
1158
# From the Avahi example code
1159
server.connect_to_signal("StateChanged", server_state_changed)
1962
1160
try:
1963
service.activate()
1161
server_state_changed(server.GetState())
1964
1162
except dbus.exceptions.DBusException, error:
1965
1163
logger.critical(u"DBusException: %s", error)
1966
cleanup()
1967
1164
sys.exit(1)
1968
1165
# End of Avahi example code
1969
1166
1976
1173
main_loop.run()
1977
1174
except AvahiError, error:
1978
1175
logger.critical(u"AvahiError: %s", error)
1979
cleanup()
1980
1176
sys.exit(1)
1981
1177
except KeyboardInterrupt:
1982
1178
if debug:
1983
print >> sys.stderr
1984
logger.debug(u"Server received KeyboardInterrupt")
1985
logger.debug(u"Server exiting")
1986
# Must run before the D-Bus bus name gets deregistered
1987
cleanup()
1179
print
1988
1180
1989
1181
if __name__ == '__main__':
1990
1182
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0