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- Committer: teddy at bsnet
- Date: 2010-09-23 20:14:08 UTC
- Revision ID: teddy@fukt.bsnet.se-20100923201408-4vcvjmml000fr8y5
* Makefile (DOCS): Added "plymouth.8mandos".
(install-server): Also install "mandos-monitor.8" and
"mandos-ctl.8".
(install-client-nokey): Also install "plymouth.8mandos".
(uninstall-server): Also remove "mandos-monitor.8" and
"mandos-ctl.8".
(uninstall-client): Also remove "plymouth.8mandos".
* plugins.d/plymouth.xml: New.
(install-server): Also install "mandos-monitor.8" and
"mandos-ctl.8".
(install-client-nokey): Also install "plymouth.8mandos".
(uninstall-server): Also remove "mandos-monitor.8" and
"mandos-ctl.8".
(uninstall-client): Also remove "plymouth.8mandos".
* plugins.d/plymouth.xml: New.
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
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
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
63
import multiprocessing
60
64
61
65
import dbus
62
66
import dbus.service
65
69
from dbus.mainloop.glib import DBusGMainLoop
66
70
import ctypes
67
71
import ctypes.util
68
69
version = "1.0.8"
70
71
logger = logging.Logger('mandos')
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')
72
88
syslogger = (logging.handlers.SysLogHandler
73
89
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
74
90
address = "/dev/log"))
75
91
syslogger.setFormatter(logging.Formatter
76
('Mandos [%(process)d]: %(levelname)s:'
77
' %(message)s'))
92
(u'Mandos [%(process)d]: %(levelname)s:'
93
u' %(message)s'))
78
94
logger.addHandler(syslogger)
79
95
80
96
console = logging.StreamHandler()
81
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
82
' %(levelname)s: %(message)s'))
97
console.setFormatter(logging.Formatter(u'%(name)s [%(process)d]:'
98
u' %(levelname)s:'
99
u' %(message)s'))
83
100
logger.addHandler(console)
84
101
85
102
class AvahiError(Exception):
98
115
99
116
class AvahiService(object):
100
117
"""An Avahi (Zeroconf) service.
118
101
119
Attributes:
102
120
interface: integer; avahi.IF_UNSPEC or an interface index.
103
121
Used to optionally bind to the specified interface.
104
name: string; Example: 'Mandos'
105
type: string; Example: '_mandos._tcp'.
122
name: string; Example: u'Mandos'
123
type: string; Example: u'_mandos._tcp'.
106
124
See <http://www.dns-sd.org/ServiceTypes.html>
107
125
port: integer; what port to announce
108
126
TXT: list of strings; TXT record for the service
111
129
max_renames: integer; maximum number of renames
112
130
rename_count: integer; counter so we only rename after collisions
113
131
a sensible number of times
132
group: D-Bus Entry Group
133
server: D-Bus Server
134
bus: dbus.SystemBus()
114
135
"""
115
136
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
116
137
servicetype = None, port = None, TXT = None,
117
domain = "", host = "", max_renames = 32768,
118
protocol = avahi.PROTO_UNSPEC):
138
domain = u"", host = u"", max_renames = 32768,
139
protocol = avahi.PROTO_UNSPEC, bus = None):
119
140
self.interface = interface
120
141
self.name = name
121
142
self.type = servicetype
126
147
self.rename_count = 0
127
148
self.max_renames = max_renames
128
149
self.protocol = protocol
150
self.group = None # our entry group
151
self.server = None
152
self.bus = bus
129
153
def rename(self):
130
154
"""Derived from the Avahi example code"""
131
155
if self.rename_count >= self.max_renames:
133
157
u" after %i retries, exiting.",
134
158
self.rename_count)
135
159
raise AvahiServiceError(u"Too many renames")
136
self.name = server.GetAlternativeServiceName(self.name)
160
self.name = unicode(self.server.GetAlternativeServiceName(self.name))
137
161
logger.info(u"Changing Zeroconf service name to %r ...",
138
str(self.name))
162
self.name)
139
163
syslogger.setFormatter(logging.Formatter
140
('Mandos (%s) [%%(process)d]:'
141
' %%(levelname)s: %%(message)s'
164
(u'Mandos (%s) [%%(process)d]:'
165
u' %%(levelname)s: %%(message)s'
142
166
% self.name))
143
167
self.remove()
144
self.add()
168
try:
169
self.add()
170
except dbus.exceptions.DBusException, error:
171
logger.critical(u"DBusException: %s", error)
172
self.cleanup()
173
os._exit(1)
145
174
self.rename_count += 1
146
175
def remove(self):
147
176
"""Derived from the Avahi example code"""
148
if group is not None:
149
group.Reset()
177
if self.group is not None:
178
self.group.Reset()
150
179
def add(self):
151
180
"""Derived from the Avahi example code"""
152
global group
153
if group is None:
154
group = dbus.Interface(bus.get_object
155
(avahi.DBUS_NAME,
156
server.EntryGroupNew()),
157
avahi.DBUS_INTERFACE_ENTRY_GROUP)
158
group.connect_to_signal('StateChanged',
159
entry_group_state_changed)
181
if self.group is None:
182
self.group = dbus.Interface(
183
self.bus.get_object(avahi.DBUS_NAME,
184
self.server.EntryGroupNew()),
185
avahi.DBUS_INTERFACE_ENTRY_GROUP)
186
self.group.connect_to_signal('StateChanged',
187
self
188
.entry_group_state_changed)
160
189
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
161
service.name, service.type)
162
group.AddService(
163
self.interface, # interface
164
self.protocol, # protocol
165
dbus.UInt32(0), # flags
166
self.name, self.type,
167
self.domain, self.host,
168
dbus.UInt16(self.port),
169
avahi.string_array_to_txt_array(self.TXT))
170
group.Commit()
171
172
# From the Avahi example code:
173
group = None # our entry group
174
# End of Avahi example code
175
176
177
def _datetime_to_dbus(dt, variant_level=0):
178
"""Convert a UTC datetime.datetime() to a D-Bus type."""
179
return dbus.String(dt.isoformat(), variant_level=variant_level)
190
self.name, self.type)
191
self.group.AddService(
192
self.interface,
193
self.protocol,
194
dbus.UInt32(0), # flags
195
self.name, self.type,
196
self.domain, self.host,
197
dbus.UInt16(self.port),
198
avahi.string_array_to_txt_array(self.TXT))
199
self.group.Commit()
200
def entry_group_state_changed(self, state, error):
201
"""Derived from the Avahi example code"""
202
logger.debug(u"Avahi entry group state change: %i", state)
203
204
if state == avahi.ENTRY_GROUP_ESTABLISHED:
205
logger.debug(u"Zeroconf service established.")
206
elif state == avahi.ENTRY_GROUP_COLLISION:
207
logger.warning(u"Zeroconf service name collision.")
208
self.rename()
209
elif state == avahi.ENTRY_GROUP_FAILURE:
210
logger.critical(u"Avahi: Error in group state changed %s",
211
unicode(error))
212
raise AvahiGroupError(u"State changed: %s"
213
% unicode(error))
214
def cleanup(self):
215
"""Derived from the Avahi example code"""
216
if self.group is not None:
217
self.group.Free()
218
self.group = None
219
def server_state_changed(self, state):
220
"""Derived from the Avahi example code"""
221
logger.debug(u"Avahi server state change: %i", state)
222
if state == avahi.SERVER_COLLISION:
223
logger.error(u"Zeroconf server name collision")
224
self.remove()
225
elif state == avahi.SERVER_RUNNING:
226
self.add()
227
def activate(self):
228
"""Derived from the Avahi example code"""
229
if self.server is None:
230
self.server = dbus.Interface(
231
self.bus.get_object(avahi.DBUS_NAME,
232
avahi.DBUS_PATH_SERVER),
233
avahi.DBUS_INTERFACE_SERVER)
234
self.server.connect_to_signal(u"StateChanged",
235
self.server_state_changed)
236
self.server_state_changed(self.server.GetState())
180
237
181
238
182
239
class Client(object):
183
240
"""A representation of a client host served by this server.
241
184
242
Attributes:
185
243
name: string; from the config file, used in log messages and
186
244
D-Bus identifiers
193
251
enabled: bool()
194
252
last_checked_ok: datetime.datetime(); (UTC) or None
195
253
timeout: datetime.timedelta(); How long from last_checked_ok
196
until this client is invalid
254
until this client is disabled
197
255
interval: datetime.timedelta(); How often to start a new checker
198
256
disable_hook: If set, called by disable() as disable_hook(self)
199
257
checker: subprocess.Popen(); a running checker process used
200
258
to see if the client lives.
201
259
'None' if no process is running.
202
260
checker_initiator_tag: a gobject event source tag, or None
203
disable_initiator_tag: - '' -
261
disable_initiator_tag: - '' -
204
262
checker_callback_tag: - '' -
205
263
checker_command: string; External command which is run to check if
206
264
client lives. %() expansions are done at
207
265
runtime with vars(self) as dict, so that for
208
266
instance %(name)s can be used in the command.
209
267
current_checker_command: string; current running checker_command
268
approval_delay: datetime.timedelta(); Time to wait for approval
269
_approved: bool(); 'None' if not yet approved/disapproved
270
approval_duration: datetime.timedelta(); Duration of one approval
210
271
"""
272
273
@staticmethod
274
def _timedelta_to_milliseconds(td):
275
"Convert a datetime.timedelta() to milliseconds"
276
return ((td.days * 24 * 60 * 60 * 1000)
277
+ (td.seconds * 1000)
278
+ (td.microseconds // 1000))
279
211
280
def timeout_milliseconds(self):
212
281
"Return the 'timeout' attribute in milliseconds"
213
return ((self.timeout.days * 24 * 60 * 60 * 1000)
214
+ (self.timeout.seconds * 1000)
215
+ (self.timeout.microseconds // 1000))
282
return self._timedelta_to_milliseconds(self.timeout)
216
283
217
284
def interval_milliseconds(self):
218
285
"Return the 'interval' attribute in milliseconds"
219
return ((self.interval.days * 24 * 60 * 60 * 1000)
220
+ (self.interval.seconds * 1000)
221
+ (self.interval.microseconds // 1000))
286
return self._timedelta_to_milliseconds(self.interval)
287
288
def approval_delay_milliseconds(self):
289
return self._timedelta_to_milliseconds(self.approval_delay)
222
290
223
291
def __init__(self, name = None, disable_hook=None, config=None):
224
292
"""Note: the 'checker' key in 'config' sets the
231
299
# Uppercase and remove spaces from fingerprint for later
232
300
# comparison purposes with return value from the fingerprint()
233
301
# function
234
self.fingerprint = (config["fingerprint"].upper()
302
self.fingerprint = (config[u"fingerprint"].upper()
235
303
.replace(u" ", u""))
236
304
logger.debug(u" Fingerprint: %s", self.fingerprint)
237
if "secret" in config:
238
self.secret = config["secret"].decode(u"base64")
239
elif "secfile" in config:
240
with closing(open(os.path.expanduser
241
(os.path.expandvars
242
(config["secfile"])))) as secfile:
305
if u"secret" in config:
306
self.secret = config[u"secret"].decode(u"base64")
307
elif u"secfile" in config:
308
with open(os.path.expanduser(os.path.expandvars
309
(config[u"secfile"])),
310
"rb") as secfile:
243
311
self.secret = secfile.read()
244
312
else:
245
313
raise TypeError(u"No secret or secfile for client %s"
246
314
% self.name)
247
self.host = config.get("host", "")
315
self.host = config.get(u"host", u"")
248
316
self.created = datetime.datetime.utcnow()
249
317
self.enabled = False
250
318
self.last_enabled = None
251
319
self.last_checked_ok = None
252
self.timeout = string_to_delta(config["timeout"])
253
self.interval = string_to_delta(config["interval"])
320
self.timeout = string_to_delta(config[u"timeout"])
321
self.interval = string_to_delta(config[u"interval"])
254
322
self.disable_hook = disable_hook
255
323
self.checker = None
256
324
self.checker_initiator_tag = None
257
325
self.disable_initiator_tag = None
258
326
self.checker_callback_tag = None
259
self.checker_command = config["checker"]
327
self.checker_command = config[u"checker"]
260
328
self.current_checker_command = None
261
329
self.last_connect = None
330
self._approved = None
331
self.approved_by_default = config.get(u"approved_by_default",
332
True)
333
self.approvals_pending = 0
334
self.approval_delay = string_to_delta(
335
config[u"approval_delay"])
336
self.approval_duration = string_to_delta(
337
config[u"approval_duration"])
338
self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())
262
339
340
def send_changedstate(self):
341
self.changedstate.acquire()
342
self.changedstate.notify_all()
343
self.changedstate.release()
344
263
345
def enable(self):
264
346
"""Start this client's checker and timeout hooks"""
347
if getattr(self, u"enabled", False):
348
# Already enabled
349
return
350
self.send_changedstate()
265
351
self.last_enabled = datetime.datetime.utcnow()
266
352
# Schedule a new checker to be started an 'interval' from now,
267
353
# and every interval from then on.
268
354
self.checker_initiator_tag = (gobject.timeout_add
269
355
(self.interval_milliseconds(),
270
356
self.start_checker))
271
# Also start a new checker *right now*.
272
self.start_checker()
273
357
# Schedule a disable() when 'timeout' has passed
274
358
self.disable_initiator_tag = (gobject.timeout_add
275
359
(self.timeout_milliseconds(),
276
360
self.disable))
277
361
self.enabled = True
362
# Also start a new checker *right now*.
363
self.start_checker()
278
364
279
def disable(self):
365
def disable(self, quiet=True):
280
366
"""Disable this client."""
281
367
if not getattr(self, "enabled", False):
282
368
return False
283
logger.info(u"Disabling client %s", self.name)
284
if getattr(self, "disable_initiator_tag", False):
369
if not quiet:
370
self.send_changedstate()
371
if not quiet:
372
logger.info(u"Disabling client %s", self.name)
373
if getattr(self, u"disable_initiator_tag", False):
285
374
gobject.source_remove(self.disable_initiator_tag)
286
375
self.disable_initiator_tag = None
287
if getattr(self, "checker_initiator_tag", False):
376
if getattr(self, u"checker_initiator_tag", False):
288
377
gobject.source_remove(self.checker_initiator_tag)
289
378
self.checker_initiator_tag = None
290
379
self.stop_checker()
317
406
318
407
def checked_ok(self):
319
408
"""Bump up the timeout for this client.
409
320
410
This should only be called when the client has been seen,
321
411
alive and well.
322
412
"""
328
418
329
419
def start_checker(self):
330
420
"""Start a new checker subprocess if one is not running.
421
331
422
If a checker already exists, leave it running and do
332
423
nothing."""
333
424
# The reason for not killing a running checker is that if we
336
427
# client would inevitably timeout, since no checker would get
337
428
# a chance to run to completion. If we instead leave running
338
429
# checkers alone, the checker would have to take more time
339
# than 'timeout' for the client to be declared invalid, which
340
# is as it should be.
430
# than 'timeout' for the client to be disabled, which is as it
431
# should be.
341
432
342
433
# If a checker exists, make sure it is not a zombie
343
if self.checker is not None:
434
try:
344
435
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
436
except (AttributeError, OSError), error:
437
if (isinstance(error, OSError)
438
and error.errno != errno.ECHILD):
439
raise error
440
else:
345
441
if pid:
346
logger.warning("Checker was a zombie")
442
logger.warning(u"Checker was a zombie")
347
443
gobject.source_remove(self.checker_callback_tag)
348
444
self.checker_callback(pid, status,
349
445
self.current_checker_command)
354
450
command = self.checker_command % self.host
355
451
except TypeError:
356
452
# Escape attributes for the shell
357
escaped_attrs = dict((key, re.escape(str(val)))
453
escaped_attrs = dict((key,
454
re.escape(unicode(str(val),
455
errors=
456
u'replace')))
358
457
for key, val in
359
458
vars(self).iteritems())
360
459
try:
373
472
# always replaced by /dev/null.)
374
473
self.checker = subprocess.Popen(command,
375
474
close_fds=True,
376
shell=True, cwd="/")
475
shell=True, cwd=u"/")
377
476
self.checker_callback_tag = (gobject.child_watch_add
378
477
(self.checker.pid,
379
478
self.checker_callback,
395
494
if self.checker_callback_tag:
396
495
gobject.source_remove(self.checker_callback_tag)
397
496
self.checker_callback_tag = None
398
if getattr(self, "checker", None) is None:
497
if getattr(self, u"checker", None) is None:
399
498
return
400
499
logger.debug(u"Stopping checker for %(name)s", vars(self))
401
500
try:
402
501
os.kill(self.checker.pid, signal.SIGTERM)
403
#os.sleep(0.5)
502
#time.sleep(0.5)
404
503
#if self.checker.poll() is None:
405
504
# os.kill(self.checker.pid, signal.SIGKILL)
406
505
except OSError, error:
407
506
if error.errno != errno.ESRCH: # No such process
408
507
raise
409
508
self.checker = None
410
411
def still_valid(self):
412
"""Has the timeout not yet passed for this client?"""
413
if not getattr(self, "enabled", False):
414
return False
415
now = datetime.datetime.utcnow()
416
if self.last_checked_ok is None:
417
return now < (self.created + self.timeout)
418
else:
419
return now < (self.last_checked_ok + self.timeout)
420
421
422
class ClientDBus(Client, dbus.service.Object):
509
510
def dbus_service_property(dbus_interface, signature=u"v",
511
access=u"readwrite", byte_arrays=False):
512
"""Decorators for marking methods of a DBusObjectWithProperties to
513
become properties on the D-Bus.
514
515
The decorated method will be called with no arguments by "Get"
516
and with one argument by "Set".
517
518
The parameters, where they are supported, are the same as
519
dbus.service.method, except there is only "signature", since the
520
type from Get() and the type sent to Set() is the same.
521
"""
522
# Encoding deeply encoded byte arrays is not supported yet by the
523
# "Set" method, so we fail early here:
524
if byte_arrays and signature != u"ay":
525
raise ValueError(u"Byte arrays not supported for non-'ay'"
526
u" signature %r" % signature)
527
def decorator(func):
528
func._dbus_is_property = True
529
func._dbus_interface = dbus_interface
530
func._dbus_signature = signature
531
func._dbus_access = access
532
func._dbus_name = func.__name__
533
if func._dbus_name.endswith(u"_dbus_property"):
534
func._dbus_name = func._dbus_name[:-14]
535
func._dbus_get_args_options = {u'byte_arrays': byte_arrays }
536
return func
537
return decorator
538
539
540
class DBusPropertyException(dbus.exceptions.DBusException):
541
"""A base class for D-Bus property-related exceptions
542
"""
543
def __unicode__(self):
544
return unicode(str(self))
545
546
547
class DBusPropertyAccessException(DBusPropertyException):
548
"""A property's access permissions disallows an operation.
549
"""
550
pass
551
552
553
class DBusPropertyNotFound(DBusPropertyException):
554
"""An attempt was made to access a non-existing property.
555
"""
556
pass
557
558
559
class DBusObjectWithProperties(dbus.service.Object):
560
"""A D-Bus object with properties.
561
562
Classes inheriting from this can use the dbus_service_property
563
decorator to expose methods as D-Bus properties. It exposes the
564
standard Get(), Set(), and GetAll() methods on the D-Bus.
565
"""
566
567
@staticmethod
568
def _is_dbus_property(obj):
569
return getattr(obj, u"_dbus_is_property", False)
570
571
def _get_all_dbus_properties(self):
572
"""Returns a generator of (name, attribute) pairs
573
"""
574
return ((prop._dbus_name, prop)
575
for name, prop in
576
inspect.getmembers(self, self._is_dbus_property))
577
578
def _get_dbus_property(self, interface_name, property_name):
579
"""Returns a bound method if one exists which is a D-Bus
580
property with the specified name and interface.
581
"""
582
for name in (property_name,
583
property_name + u"_dbus_property"):
584
prop = getattr(self, name, None)
585
if (prop is None
586
or not self._is_dbus_property(prop)
587
or prop._dbus_name != property_name
588
or (interface_name and prop._dbus_interface
589
and interface_name != prop._dbus_interface)):
590
continue
591
return prop
592
# No such property
593
raise DBusPropertyNotFound(self.dbus_object_path + u":"
594
+ interface_name + u"."
595
+ property_name)
596
597
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ss",
598
out_signature=u"v")
599
def Get(self, interface_name, property_name):
600
"""Standard D-Bus property Get() method, see D-Bus standard.
601
"""
602
prop = self._get_dbus_property(interface_name, property_name)
603
if prop._dbus_access == u"write":
604
raise DBusPropertyAccessException(property_name)
605
value = prop()
606
if not hasattr(value, u"variant_level"):
607
return value
608
return type(value)(value, variant_level=value.variant_level+1)
609
610
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ssv")
611
def Set(self, interface_name, property_name, value):
612
"""Standard D-Bus property Set() method, see D-Bus standard.
613
"""
614
prop = self._get_dbus_property(interface_name, property_name)
615
if prop._dbus_access == u"read":
616
raise DBusPropertyAccessException(property_name)
617
if prop._dbus_get_args_options[u"byte_arrays"]:
618
# The byte_arrays option is not supported yet on
619
# signatures other than "ay".
620
if prop._dbus_signature != u"ay":
621
raise ValueError
622
value = dbus.ByteArray(''.join(unichr(byte)
623
for byte in value))
624
prop(value)
625
626
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"s",
627
out_signature=u"a{sv}")
628
def GetAll(self, interface_name):
629
"""Standard D-Bus property GetAll() method, see D-Bus
630
standard.
631
632
Note: Will not include properties with access="write".
633
"""
634
all = {}
635
for name, prop in self._get_all_dbus_properties():
636
if (interface_name
637
and interface_name != prop._dbus_interface):
638
# Interface non-empty but did not match
639
continue
640
# Ignore write-only properties
641
if prop._dbus_access == u"write":
642
continue
643
value = prop()
644
if not hasattr(value, u"variant_level"):
645
all[name] = value
646
continue
647
all[name] = type(value)(value, variant_level=
648
value.variant_level+1)
649
return dbus.Dictionary(all, signature=u"sv")
650
651
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
652
out_signature=u"s",
653
path_keyword='object_path',
654
connection_keyword='connection')
655
def Introspect(self, object_path, connection):
656
"""Standard D-Bus method, overloaded to insert property tags.
657
"""
658
xmlstring = dbus.service.Object.Introspect(self, object_path,
659
connection)
660
try:
661
document = xml.dom.minidom.parseString(xmlstring)
662
def make_tag(document, name, prop):
663
e = document.createElement(u"property")
664
e.setAttribute(u"name", name)
665
e.setAttribute(u"type", prop._dbus_signature)
666
e.setAttribute(u"access", prop._dbus_access)
667
return e
668
for if_tag in document.getElementsByTagName(u"interface"):
669
for tag in (make_tag(document, name, prop)
670
for name, prop
671
in self._get_all_dbus_properties()
672
if prop._dbus_interface
673
== if_tag.getAttribute(u"name")):
674
if_tag.appendChild(tag)
675
# Add the names to the return values for the
676
# "org.freedesktop.DBus.Properties" methods
677
if (if_tag.getAttribute(u"name")
678
== u"org.freedesktop.DBus.Properties"):
679
for cn in if_tag.getElementsByTagName(u"method"):
680
if cn.getAttribute(u"name") == u"Get":
681
for arg in cn.getElementsByTagName(u"arg"):
682
if (arg.getAttribute(u"direction")
683
== u"out"):
684
arg.setAttribute(u"name", u"value")
685
elif cn.getAttribute(u"name") == u"GetAll":
686
for arg in cn.getElementsByTagName(u"arg"):
687
if (arg.getAttribute(u"direction")
688
== u"out"):
689
arg.setAttribute(u"name", u"props")
690
xmlstring = document.toxml(u"utf-8")
691
document.unlink()
692
except (AttributeError, xml.dom.DOMException,
693
xml.parsers.expat.ExpatError), error:
694
logger.error(u"Failed to override Introspection method",
695
error)
696
return xmlstring
697
698
699
class ClientDBus(Client, DBusObjectWithProperties):
423
700
"""A Client class using D-Bus
701
424
702
Attributes:
425
dbus_object_path: dbus.ObjectPath ; only set if self.use_dbus
703
dbus_object_path: dbus.ObjectPath
704
bus: dbus.SystemBus()
426
705
"""
427
706
# dbus.service.Object doesn't use super(), so we can't either.
428
707
429
def __init__(self, *args, **kwargs):
708
def __init__(self, bus = None, *args, **kwargs):
709
self._approvals_pending = 0
710
self.bus = bus
430
711
Client.__init__(self, *args, **kwargs)
431
712
# Only now, when this client is initialized, can it show up on
432
713
# the D-Bus
433
714
self.dbus_object_path = (dbus.ObjectPath
434
("/clients/"
435
+ self.name.replace(".", "_")))
436
dbus.service.Object.__init__(self, bus,
437
self.dbus_object_path)
715
(u"/clients/"
716
+ self.name.replace(u".", u"_")))
717
DBusObjectWithProperties.__init__(self, self.bus,
718
self.dbus_object_path)
719
720
def _get_approvals_pending(self):
721
return self._approvals_pending
722
def _set_approvals_pending(self, value):
723
old_value = self._approvals_pending
724
self._approvals_pending = value
725
bval = bool(value)
726
if (hasattr(self, "dbus_object_path")
727
and bval is not bool(old_value)):
728
dbus_bool = dbus.Boolean(bval, variant_level=1)
729
self.PropertyChanged(dbus.String(u"ApprovalPending"),
730
dbus_bool)
731
732
approvals_pending = property(_get_approvals_pending,
733
_set_approvals_pending)
734
del _get_approvals_pending, _set_approvals_pending
735
736
@staticmethod
737
def _datetime_to_dbus(dt, variant_level=0):
738
"""Convert a UTC datetime.datetime() to a D-Bus type."""
739
return dbus.String(dt.isoformat(),
740
variant_level=variant_level)
741
438
742
def enable(self):
439
oldstate = getattr(self, "enabled", False)
743
oldstate = getattr(self, u"enabled", False)
440
744
r = Client.enable(self)
441
745
if oldstate != self.enabled:
442
746
# Emit D-Bus signals
443
self.PropertyChanged(dbus.String(u"enabled"),
747
self.PropertyChanged(dbus.String(u"Enabled"),
444
748
dbus.Boolean(True, variant_level=1))
445
self.PropertyChanged(dbus.String(u"last_enabled"),
446
(_datetime_to_dbus(self.last_enabled,
447
variant_level=1)))
749
self.PropertyChanged(
750
dbus.String(u"LastEnabled"),
751
self._datetime_to_dbus(self.last_enabled,
752
variant_level=1))
448
753
return r
449
754
450
def disable(self, signal = True):
451
oldstate = getattr(self, "enabled", False)
452
r = Client.disable(self)
453
if signal and oldstate != self.enabled:
755
def disable(self, quiet = False):
756
oldstate = getattr(self, u"enabled", False)
757
r = Client.disable(self, quiet=quiet)
758
if not quiet and oldstate != self.enabled:
454
759
# Emit D-Bus signal
455
self.PropertyChanged(dbus.String(u"enabled"),
760
self.PropertyChanged(dbus.String(u"Enabled"),
456
761
dbus.Boolean(False, variant_level=1))
457
762
return r
458
763
461
766
self.remove_from_connection()
462
767
except LookupError:
463
768
pass
464
if hasattr(dbus.service.Object, "__del__"):
465
dbus.service.Object.__del__(self, *args, **kwargs)
769
if hasattr(DBusObjectWithProperties, u"__del__"):
770
DBusObjectWithProperties.__del__(self, *args, **kwargs)
466
771
Client.__del__(self, *args, **kwargs)
467
772
468
773
def checker_callback(self, pid, condition, command,
470
775
self.checker_callback_tag = None
471
776
self.checker = None
472
777
# Emit D-Bus signal
473
self.PropertyChanged(dbus.String(u"checker_running"),
778
self.PropertyChanged(dbus.String(u"CheckerRunning"),
474
779
dbus.Boolean(False, variant_level=1))
475
780
if os.WIFEXITED(condition):
476
781
exitstatus = os.WEXITSTATUS(condition)
491
796
r = Client.checked_ok(self, *args, **kwargs)
492
797
# Emit D-Bus signal
493
798
self.PropertyChanged(
494
dbus.String(u"last_checked_ok"),
495
(_datetime_to_dbus(self.last_checked_ok,
496
variant_level=1)))
799
dbus.String(u"LastCheckedOK"),
800
(self._datetime_to_dbus(self.last_checked_ok,
801
variant_level=1)))
497
802
return r
498
803
499
804
def start_checker(self, *args, **kwargs):
509
814
# Emit D-Bus signal
510
815
self.CheckerStarted(self.current_checker_command)
511
816
self.PropertyChanged(
512
dbus.String("checker_running"),
817
dbus.String(u"CheckerRunning"),
513
818
dbus.Boolean(True, variant_level=1))
514
819
return r
515
820
516
821
def stop_checker(self, *args, **kwargs):
517
old_checker = getattr(self, "checker", None)
822
old_checker = getattr(self, u"checker", None)
518
823
r = Client.stop_checker(self, *args, **kwargs)
519
824
if (old_checker is not None
520
and getattr(self, "checker", None) is None):
521
self.PropertyChanged(dbus.String(u"checker_running"),
825
and getattr(self, u"checker", None) is None):
826
self.PropertyChanged(dbus.String(u"CheckerRunning"),
522
827
dbus.Boolean(False, variant_level=1))
523
828
return r
524
525
## D-Bus methods & signals
829
830
def _reset_approved(self):
831
self._approved = None
832
return False
833
834
def approve(self, value=True):
835
self.send_changedstate()
836
self._approved = value
837
gobject.timeout_add(self._timedelta_to_milliseconds
838
(self.approval_duration),
839
self._reset_approved)
840
841
842
## D-Bus methods, signals & properties
526
843
_interface = u"se.bsnet.fukt.Mandos.Client"
527
844
528
# CheckedOK - method
529
CheckedOK = dbus.service.method(_interface)(checked_ok)
530
CheckedOK.__name__ = "CheckedOK"
845
## Signals
531
846
532
847
# CheckerCompleted - signal
533
@dbus.service.signal(_interface, signature="nxs")
848
@dbus.service.signal(_interface, signature=u"nxs")
534
849
def CheckerCompleted(self, exitcode, waitstatus, command):
535
850
"D-Bus signal"
536
851
pass
537
852
538
853
# CheckerStarted - signal
539
@dbus.service.signal(_interface, signature="s")
854
@dbus.service.signal(_interface, signature=u"s")
540
855
def CheckerStarted(self, command):
541
856
"D-Bus signal"
542
857
pass
543
858
544
# GetAllProperties - method
545
@dbus.service.method(_interface, out_signature="a{sv}")
546
def GetAllProperties(self):
547
"D-Bus method"
548
return dbus.Dictionary({
549
dbus.String("name"):
550
dbus.String(self.name, variant_level=1),
551
dbus.String("fingerprint"):
552
dbus.String(self.fingerprint, variant_level=1),
553
dbus.String("host"):
554
dbus.String(self.host, variant_level=1),
555
dbus.String("created"):
556
_datetime_to_dbus(self.created, variant_level=1),
557
dbus.String("last_enabled"):
558
(_datetime_to_dbus(self.last_enabled,
559
variant_level=1)
560
if self.last_enabled is not None
561
else dbus.Boolean(False, variant_level=1)),
562
dbus.String("enabled"):
563
dbus.Boolean(self.enabled, variant_level=1),
564
dbus.String("last_checked_ok"):
565
(_datetime_to_dbus(self.last_checked_ok,
566
variant_level=1)
567
if self.last_checked_ok is not None
568
else dbus.Boolean (False, variant_level=1)),
569
dbus.String("timeout"):
570
dbus.UInt64(self.timeout_milliseconds(),
571
variant_level=1),
572
dbus.String("interval"):
573
dbus.UInt64(self.interval_milliseconds(),
574
variant_level=1),
575
dbus.String("checker"):
576
dbus.String(self.checker_command,
577
variant_level=1),
578
dbus.String("checker_running"):
579
dbus.Boolean(self.checker is not None,
580
variant_level=1),
581
dbus.String("object_path"):
582
dbus.ObjectPath(self.dbus_object_path,
583
variant_level=1)
584
}, signature="sv")
585
586
# IsStillValid - method
587
@dbus.service.method(_interface, out_signature="b")
588
def IsStillValid(self):
589
return self.still_valid()
590
591
859
# PropertyChanged - signal
592
@dbus.service.signal(_interface, signature="sv")
860
@dbus.service.signal(_interface, signature=u"sv")
593
861
def PropertyChanged(self, property, value):
594
862
"D-Bus signal"
595
863
pass
596
864
597
# ReceivedSecret - signal
865
# GotSecret - signal
598
866
@dbus.service.signal(_interface)
599
def ReceivedSecret(self):
600
"D-Bus signal"
867
def GotSecret(self):
868
"""D-Bus signal
869
Is sent after a successful transfer of secret from the Mandos
870
server to mandos-client
871
"""
601
872
pass
602
873
603
874
# Rejected - signal
604
@dbus.service.signal(_interface)
605
def Rejected(self):
606
"D-Bus signal"
607
pass
608
609
# SetChecker - method
610
@dbus.service.method(_interface, in_signature="s")
611
def SetChecker(self, checker):
612
"D-Bus setter method"
613
self.checker_command = checker
614
# Emit D-Bus signal
615
self.PropertyChanged(dbus.String(u"checker"),
616
dbus.String(self.checker_command,
617
variant_level=1))
618
619
# SetHost - method
620
@dbus.service.method(_interface, in_signature="s")
621
def SetHost(self, host):
622
"D-Bus setter method"
623
self.host = host
624
# Emit D-Bus signal
625
self.PropertyChanged(dbus.String(u"host"),
626
dbus.String(self.host, variant_level=1))
627
628
# SetInterval - method
629
@dbus.service.method(_interface, in_signature="t")
630
def SetInterval(self, milliseconds):
631
self.interval = datetime.timedelta(0, 0, 0, milliseconds)
632
# Emit D-Bus signal
633
self.PropertyChanged(dbus.String(u"interval"),
634
(dbus.UInt64(self.interval_milliseconds(),
635
variant_level=1)))
636
637
# SetSecret - method
638
@dbus.service.method(_interface, in_signature="ay",
639
byte_arrays=True)
640
def SetSecret(self, secret):
641
"D-Bus setter method"
642
self.secret = str(secret)
643
644
# SetTimeout - method
645
@dbus.service.method(_interface, in_signature="t")
646
def SetTimeout(self, milliseconds):
647
self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
648
# Emit D-Bus signal
649
self.PropertyChanged(dbus.String(u"timeout"),
650
(dbus.UInt64(self.timeout_milliseconds(),
651
variant_level=1)))
875
@dbus.service.signal(_interface, signature=u"s")
876
def Rejected(self, reason):
877
"D-Bus signal"
878
pass
879
880
# NeedApproval - signal
881
@dbus.service.signal(_interface, signature=u"tb")
882
def NeedApproval(self, timeout, default):
883
"D-Bus signal"
884
pass
885
886
## Methods
887
888
# Approve - method
889
@dbus.service.method(_interface, in_signature=u"b")
890
def Approve(self, value):
891
self.approve(value)
892
893
# CheckedOK - method
894
@dbus.service.method(_interface)
895
def CheckedOK(self):
896
return self.checked_ok()
652
897
653
898
# Enable - method
654
Enable = dbus.service.method(_interface)(enable)
655
Enable.__name__ = "Enable"
899
@dbus.service.method(_interface)
900
def Enable(self):
901
"D-Bus method"
902
self.enable()
656
903
657
904
# StartChecker - method
658
905
@dbus.service.method(_interface)
667
914
self.disable()
668
915
669
916
# StopChecker - method
670
StopChecker = dbus.service.method(_interface)(stop_checker)
671
StopChecker.__name__ = "StopChecker"
917
@dbus.service.method(_interface)
918
def StopChecker(self):
919
self.stop_checker()
920
921
## Properties
922
923
# ApprovalPending - property
924
@dbus_service_property(_interface, signature=u"b", access=u"read")
925
def ApprovalPending_dbus_property(self):
926
return dbus.Boolean(bool(self.approvals_pending))
927
928
# ApprovedByDefault - property
929
@dbus_service_property(_interface, signature=u"b",
930
access=u"readwrite")
931
def ApprovedByDefault_dbus_property(self, value=None):
932
if value is None: # get
933
return dbus.Boolean(self.approved_by_default)
934
self.approved_by_default = bool(value)
935
# Emit D-Bus signal
936
self.PropertyChanged(dbus.String(u"ApprovedByDefault"),
937
dbus.Boolean(value, variant_level=1))
938
939
# ApprovalDelay - property
940
@dbus_service_property(_interface, signature=u"t",
941
access=u"readwrite")
942
def ApprovalDelay_dbus_property(self, value=None):
943
if value is None: # get
944
return dbus.UInt64(self.approval_delay_milliseconds())
945
self.approval_delay = datetime.timedelta(0, 0, 0, value)
946
# Emit D-Bus signal
947
self.PropertyChanged(dbus.String(u"ApprovalDelay"),
948
dbus.UInt64(value, variant_level=1))
949
950
# ApprovalDuration - property
951
@dbus_service_property(_interface, signature=u"t",
952
access=u"readwrite")
953
def ApprovalDuration_dbus_property(self, value=None):
954
if value is None: # get
955
return dbus.UInt64(self._timedelta_to_milliseconds(
956
self.approval_duration))
957
self.approval_duration = datetime.timedelta(0, 0, 0, value)
958
# Emit D-Bus signal
959
self.PropertyChanged(dbus.String(u"ApprovalDuration"),
960
dbus.UInt64(value, variant_level=1))
961
962
# Name - property
963
@dbus_service_property(_interface, signature=u"s", access=u"read")
964
def Name_dbus_property(self):
965
return dbus.String(self.name)
966
967
# Fingerprint - property
968
@dbus_service_property(_interface, signature=u"s", access=u"read")
969
def Fingerprint_dbus_property(self):
970
return dbus.String(self.fingerprint)
971
972
# Host - property
973
@dbus_service_property(_interface, signature=u"s",
974
access=u"readwrite")
975
def Host_dbus_property(self, value=None):
976
if value is None: # get
977
return dbus.String(self.host)
978
self.host = value
979
# Emit D-Bus signal
980
self.PropertyChanged(dbus.String(u"Host"),
981
dbus.String(value, variant_level=1))
982
983
# Created - property
984
@dbus_service_property(_interface, signature=u"s", access=u"read")
985
def Created_dbus_property(self):
986
return dbus.String(self._datetime_to_dbus(self.created))
987
988
# LastEnabled - property
989
@dbus_service_property(_interface, signature=u"s", access=u"read")
990
def LastEnabled_dbus_property(self):
991
if self.last_enabled is None:
992
return dbus.String(u"")
993
return dbus.String(self._datetime_to_dbus(self.last_enabled))
994
995
# Enabled - property
996
@dbus_service_property(_interface, signature=u"b",
997
access=u"readwrite")
998
def Enabled_dbus_property(self, value=None):
999
if value is None: # get
1000
return dbus.Boolean(self.enabled)
1001
if value:
1002
self.enable()
1003
else:
1004
self.disable()
1005
1006
# LastCheckedOK - property
1007
@dbus_service_property(_interface, signature=u"s",
1008
access=u"readwrite")
1009
def LastCheckedOK_dbus_property(self, value=None):
1010
if value is not None:
1011
self.checked_ok()
1012
return
1013
if self.last_checked_ok is None:
1014
return dbus.String(u"")
1015
return dbus.String(self._datetime_to_dbus(self
1016
.last_checked_ok))
1017
1018
# Timeout - property
1019
@dbus_service_property(_interface, signature=u"t",
1020
access=u"readwrite")
1021
def Timeout_dbus_property(self, value=None):
1022
if value is None: # get
1023
return dbus.UInt64(self.timeout_milliseconds())
1024
self.timeout = datetime.timedelta(0, 0, 0, value)
1025
# Emit D-Bus signal
1026
self.PropertyChanged(dbus.String(u"Timeout"),
1027
dbus.UInt64(value, variant_level=1))
1028
if getattr(self, u"disable_initiator_tag", None) is None:
1029
return
1030
# Reschedule timeout
1031
gobject.source_remove(self.disable_initiator_tag)
1032
self.disable_initiator_tag = None
1033
time_to_die = (self.
1034
_timedelta_to_milliseconds((self
1035
.last_checked_ok
1036
+ self.timeout)
1037
- datetime.datetime
1038
.utcnow()))
1039
if time_to_die <= 0:
1040
# The timeout has passed
1041
self.disable()
1042
else:
1043
self.disable_initiator_tag = (gobject.timeout_add
1044
(time_to_die, self.disable))
1045
1046
# Interval - property
1047
@dbus_service_property(_interface, signature=u"t",
1048
access=u"readwrite")
1049
def Interval_dbus_property(self, value=None):
1050
if value is None: # get
1051
return dbus.UInt64(self.interval_milliseconds())
1052
self.interval = datetime.timedelta(0, 0, 0, value)
1053
# Emit D-Bus signal
1054
self.PropertyChanged(dbus.String(u"Interval"),
1055
dbus.UInt64(value, variant_level=1))
1056
if getattr(self, u"checker_initiator_tag", None) is None:
1057
return
1058
# Reschedule checker run
1059
gobject.source_remove(self.checker_initiator_tag)
1060
self.checker_initiator_tag = (gobject.timeout_add
1061
(value, self.start_checker))
1062
self.start_checker() # Start one now, too
1063
1064
# Checker - property
1065
@dbus_service_property(_interface, signature=u"s",
1066
access=u"readwrite")
1067
def Checker_dbus_property(self, value=None):
1068
if value is None: # get
1069
return dbus.String(self.checker_command)
1070
self.checker_command = value
1071
# Emit D-Bus signal
1072
self.PropertyChanged(dbus.String(u"Checker"),
1073
dbus.String(self.checker_command,
1074
variant_level=1))
1075
1076
# CheckerRunning - property
1077
@dbus_service_property(_interface, signature=u"b",
1078
access=u"readwrite")
1079
def CheckerRunning_dbus_property(self, value=None):
1080
if value is None: # get
1081
return dbus.Boolean(self.checker is not None)
1082
if value:
1083
self.start_checker()
1084
else:
1085
self.stop_checker()
1086
1087
# ObjectPath - property
1088
@dbus_service_property(_interface, signature=u"o", access=u"read")
1089
def ObjectPath_dbus_property(self):
1090
return self.dbus_object_path # is already a dbus.ObjectPath
1091
1092
# Secret = property
1093
@dbus_service_property(_interface, signature=u"ay",
1094
access=u"write", byte_arrays=True)
1095
def Secret_dbus_property(self, value):
1096
self.secret = str(value)
672
1097
673
1098
del _interface
674
1099
675
1100
676
def peer_certificate(session):
677
"Return the peer's OpenPGP certificate as a bytestring"
678
# If not an OpenPGP certificate...
679
if (gnutls.library.functions
680
.gnutls_certificate_type_get(session._c_object)
681
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
682
# ...do the normal thing
683
return session.peer_certificate
684
list_size = ctypes.c_uint(1)
685
cert_list = (gnutls.library.functions
686
.gnutls_certificate_get_peers
687
(session._c_object, ctypes.byref(list_size)))
688
if not bool(cert_list) and list_size.value != 0:
689
raise gnutls.errors.GNUTLSError("error getting peer"
690
" certificate")
691
if list_size.value == 0:
692
return None
693
cert = cert_list[0]
694
return ctypes.string_at(cert.data, cert.size)
695
696
697
def fingerprint(openpgp):
698
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
699
# New GnuTLS "datum" with the OpenPGP public key
700
datum = (gnutls.library.types
701
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
702
ctypes.POINTER
703
(ctypes.c_ubyte)),
704
ctypes.c_uint(len(openpgp))))
705
# New empty GnuTLS certificate
706
crt = gnutls.library.types.gnutls_openpgp_crt_t()
707
(gnutls.library.functions
708
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
709
# Import the OpenPGP public key into the certificate
710
(gnutls.library.functions
711
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
712
gnutls.library.constants
713
.GNUTLS_OPENPGP_FMT_RAW))
714
# Verify the self signature in the key
715
crtverify = ctypes.c_uint()
716
(gnutls.library.functions
717
.gnutls_openpgp_crt_verify_self(crt, 0, ctypes.byref(crtverify)))
718
if crtverify.value != 0:
719
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
720
raise gnutls.errors.CertificateSecurityError("Verify failed")
721
# New buffer for the fingerprint
722
buf = ctypes.create_string_buffer(20)
723
buf_len = ctypes.c_size_t()
724
# Get the fingerprint from the certificate into the buffer
725
(gnutls.library.functions
726
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
727
ctypes.byref(buf_len)))
728
# Deinit the certificate
729
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
730
# Convert the buffer to a Python bytestring
731
fpr = ctypes.string_at(buf, buf_len.value)
732
# Convert the bytestring to hexadecimal notation
733
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
734
return hex_fpr
735
736
737
class TCP_handler(SocketServer.BaseRequestHandler, object):
738
"""A TCP request handler class.
739
Instantiated by IPv6_TCPServer for each request to handle it.
1101
class ProxyClient(object):
1102
def __init__(self, child_pipe, fpr, address):
1103
self._pipe = child_pipe
1104
self._pipe.send(('init', fpr, address))
1105
if not self._pipe.recv():
1106
raise KeyError()
1107
1108
def __getattribute__(self, name):
1109
if(name == '_pipe'):
1110
return super(ProxyClient, self).__getattribute__(name)
1111
self._pipe.send(('getattr', name))
1112
data = self._pipe.recv()
1113
if data[0] == 'data':
1114
return data[1]
1115
if data[0] == 'function':
1116
def func(*args, **kwargs):
1117
self._pipe.send(('funcall', name, args, kwargs))
1118
return self._pipe.recv()[1]
1119
return func
1120
1121
def __setattr__(self, name, value):
1122
if(name == '_pipe'):
1123
return super(ProxyClient, self).__setattr__(name, value)
1124
self._pipe.send(('setattr', name, value))
1125
1126
1127
class ClientHandler(socketserver.BaseRequestHandler, object):
1128
"""A class to handle client connections.
1129
1130
Instantiated once for each connection to handle it.
740
1131
Note: This will run in its own forked process."""
741
1132
742
1133
def handle(self):
743
logger.info(u"TCP connection from: %s",
744
unicode(self.client_address))
745
logger.debug(u"IPC Pipe FD: %d", self.server.pipe[1])
746
# Open IPC pipe to parent process
747
with closing(os.fdopen(self.server.pipe[1], "w", 1)) as ipc:
1134
with contextlib.closing(self.server.child_pipe) as child_pipe:
1135
logger.info(u"TCP connection from: %s",
1136
unicode(self.client_address))
1137
logger.debug(u"Pipe FD: %d",
1138
self.server.child_pipe.fileno())
1139
748
1140
session = (gnutls.connection
749
1141
.ClientSession(self.request,
750
1142
gnutls.connection
751
1143
.X509Credentials()))
752
753
line = self.request.makefile().readline()
754
logger.debug(u"Protocol version: %r", line)
755
try:
756
if int(line.strip().split()[0]) > 1:
757
raise RuntimeError
758
except (ValueError, IndexError, RuntimeError), error:
759
logger.error(u"Unknown protocol version: %s", error)
760
return
761
1144
762
1145
# Note: gnutls.connection.X509Credentials is really a
763
1146
# generic GnuTLS certificate credentials object so long as
764
1147
# no X.509 keys are added to it. Therefore, we can use it
765
1148
# here despite using OpenPGP certificates.
766
767
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
768
# "+AES-256-CBC", "+SHA1",
769
# "+COMP-NULL", "+CTYPE-OPENPGP",
770
# "+DHE-DSS"))
1149
1150
#priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
1151
# u"+AES-256-CBC", u"+SHA1",
1152
# u"+COMP-NULL", u"+CTYPE-OPENPGP",
1153
# u"+DHE-DSS"))
771
1154
# Use a fallback default, since this MUST be set.
772
priority = self.server.settings.get("priority", "NORMAL")
1155
priority = self.server.gnutls_priority
1156
if priority is None:
1157
priority = u"NORMAL"
773
1158
(gnutls.library.functions
774
1159
.gnutls_priority_set_direct(session._c_object,
775
1160
priority, None))
776
1161
1162
# Start communication using the Mandos protocol
1163
# Get protocol number
1164
line = self.request.makefile().readline()
1165
logger.debug(u"Protocol version: %r", line)
1166
try:
1167
if int(line.strip().split()[0]) > 1:
1168
raise RuntimeError
1169
except (ValueError, IndexError, RuntimeError), error:
1170
logger.error(u"Unknown protocol version: %s", error)
1171
return
1172
1173
# Start GnuTLS connection
777
1174
try:
778
1175
session.handshake()
779
1176
except gnutls.errors.GNUTLSError, error:
782
1179
# established. Just abandon the request.
783
1180
return
784
1181
logger.debug(u"Handshake succeeded")
1182
1183
approval_required = False
785
1184
try:
786
fpr = fingerprint(peer_certificate(session))
787
except (TypeError, gnutls.errors.GNUTLSError), error:
788
logger.warning(u"Bad certificate: %s", error)
789
session.bye()
790
return
791
logger.debug(u"Fingerprint: %s", fpr)
792
793
for c in self.server.clients:
794
if c.fingerprint == fpr:
795
client = c
796
break
797
else:
798
logger.warning(u"Client not found for fingerprint: %s",
799
fpr)
800
ipc.write("NOTFOUND %s\n" % fpr)
801
session.bye()
802
return
803
# Have to check if client.still_valid(), since it is
804
# possible that the client timed out while establishing
805
# the GnuTLS session.
806
if not client.still_valid():
807
logger.warning(u"Client %(name)s is invalid",
808
vars(client))
809
ipc.write("INVALID %s\n" % client.name)
810
session.bye()
811
return
812
ipc.write("SENDING %s\n" % client.name)
813
sent_size = 0
814
while sent_size < len(client.secret):
815
sent = session.send(client.secret[sent_size:])
816
logger.debug(u"Sent: %d, remaining: %d",
817
sent, len(client.secret)
818
- (sent_size + sent))
819
sent_size += sent
820
session.bye()
821
822
823
class ForkingMixInWithPipe(SocketServer.ForkingMixIn, object):
824
"""Like SocketServer.ForkingMixIn, but also pass a pipe.
825
Assumes a gobject.MainLoop event loop.
826
"""
1185
try:
1186
fpr = self.fingerprint(self.peer_certificate
1187
(session))
1188
except (TypeError, gnutls.errors.GNUTLSError), error:
1189
logger.warning(u"Bad certificate: %s", error)
1190
return
1191
logger.debug(u"Fingerprint: %s", fpr)
1192
1193
try:
1194
client = ProxyClient(child_pipe, fpr,
1195
self.client_address)
1196
except KeyError:
1197
return
1198
1199
if client.approval_delay:
1200
delay = client.approval_delay
1201
client.approvals_pending += 1
1202
approval_required = True
1203
1204
while True:
1205
if not client.enabled:
1206
logger.warning(u"Client %s is disabled",
1207
client.name)
1208
if self.server.use_dbus:
1209
# Emit D-Bus signal
1210
client.Rejected("Disabled")
1211
return
1212
1213
if client._approved or not client.approval_delay:
1214
#We are approved or approval is disabled
1215
break
1216
elif client._approved is None:
1217
logger.info(u"Client %s needs approval",
1218
client.name)
1219
if self.server.use_dbus:
1220
# Emit D-Bus signal
1221
client.NeedApproval(
1222
client.approval_delay_milliseconds(),
1223
client.approved_by_default)
1224
else:
1225
logger.warning(u"Client %s was not approved",
1226
client.name)
1227
if self.server.use_dbus:
1228
# Emit D-Bus signal
1229
client.Rejected("Denied")
1230
return
1231
1232
#wait until timeout or approved
1233
#x = float(client._timedelta_to_milliseconds(delay))
1234
time = datetime.datetime.now()
1235
client.changedstate.acquire()
1236
client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))
1237
client.changedstate.release()
1238
time2 = datetime.datetime.now()
1239
if (time2 - time) >= delay:
1240
if not client.approved_by_default:
1241
logger.warning("Client %s timed out while"
1242
" waiting for approval",
1243
client.name)
1244
if self.server.use_dbus:
1245
# Emit D-Bus signal
1246
client.Rejected("Approval timed out")
1247
return
1248
else:
1249
break
1250
else:
1251
delay -= time2 - time
1252
1253
sent_size = 0
1254
while sent_size < len(client.secret):
1255
try:
1256
sent = session.send(client.secret[sent_size:])
1257
except (gnutls.errors.GNUTLSError), error:
1258
logger.warning("gnutls send failed")
1259
return
1260
logger.debug(u"Sent: %d, remaining: %d",
1261
sent, len(client.secret)
1262
- (sent_size + sent))
1263
sent_size += sent
1264
1265
logger.info(u"Sending secret to %s", client.name)
1266
# bump the timeout as if seen
1267
client.checked_ok()
1268
if self.server.use_dbus:
1269
# Emit D-Bus signal
1270
client.GotSecret()
1271
1272
finally:
1273
if approval_required:
1274
client.approvals_pending -= 1
1275
try:
1276
session.bye()
1277
except (gnutls.errors.GNUTLSError), error:
1278
logger.warning("GnuTLS bye failed")
1279
1280
@staticmethod
1281
def peer_certificate(session):
1282
"Return the peer's OpenPGP certificate as a bytestring"
1283
# If not an OpenPGP certificate...
1284
if (gnutls.library.functions
1285
.gnutls_certificate_type_get(session._c_object)
1286
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1287
# ...do the normal thing
1288
return session.peer_certificate
1289
list_size = ctypes.c_uint(1)
1290
cert_list = (gnutls.library.functions
1291
.gnutls_certificate_get_peers
1292
(session._c_object, ctypes.byref(list_size)))
1293
if not bool(cert_list) and list_size.value != 0:
1294
raise gnutls.errors.GNUTLSError(u"error getting peer"
1295
u" certificate")
1296
if list_size.value == 0:
1297
return None
1298
cert = cert_list[0]
1299
return ctypes.string_at(cert.data, cert.size)
1300
1301
@staticmethod
1302
def fingerprint(openpgp):
1303
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1304
# New GnuTLS "datum" with the OpenPGP public key
1305
datum = (gnutls.library.types
1306
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1307
ctypes.POINTER
1308
(ctypes.c_ubyte)),
1309
ctypes.c_uint(len(openpgp))))
1310
# New empty GnuTLS certificate
1311
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1312
(gnutls.library.functions
1313
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1314
# Import the OpenPGP public key into the certificate
1315
(gnutls.library.functions
1316
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1317
gnutls.library.constants
1318
.GNUTLS_OPENPGP_FMT_RAW))
1319
# Verify the self signature in the key
1320
crtverify = ctypes.c_uint()
1321
(gnutls.library.functions
1322
.gnutls_openpgp_crt_verify_self(crt, 0,
1323
ctypes.byref(crtverify)))
1324
if crtverify.value != 0:
1325
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1326
raise (gnutls.errors.CertificateSecurityError
1327
(u"Verify failed"))
1328
# New buffer for the fingerprint
1329
buf = ctypes.create_string_buffer(20)
1330
buf_len = ctypes.c_size_t()
1331
# Get the fingerprint from the certificate into the buffer
1332
(gnutls.library.functions
1333
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1334
ctypes.byref(buf_len)))
1335
# Deinit the certificate
1336
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1337
# Convert the buffer to a Python bytestring
1338
fpr = ctypes.string_at(buf, buf_len.value)
1339
# Convert the bytestring to hexadecimal notation
1340
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
1341
return hex_fpr
1342
1343
1344
class MultiprocessingMixIn(object):
1345
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1346
def sub_process_main(self, request, address):
1347
try:
1348
self.finish_request(request, address)
1349
except:
1350
self.handle_error(request, address)
1351
self.close_request(request)
1352
1353
def process_request(self, request, address):
1354
"""Start a new process to process the request."""
1355
multiprocessing.Process(target = self.sub_process_main,
1356
args = (request, address)).start()
1357
1358
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1359
""" adds a pipe to the MixIn """
827
1360
def process_request(self, request, client_address):
828
"""This overrides and wraps the original process_request().
829
This function creates a new pipe in self.pipe
1361
"""Overrides and wraps the original process_request().
1362
1363
This function creates a new pipe in self.pipe
830
1364
"""
831
self.pipe = os.pipe()
832
super(ForkingMixInWithPipe,
1365
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1366
1367
super(MultiprocessingMixInWithPipe,
833
1368
self).process_request(request, client_address)
834
os.close(self.pipe[1]) # close write end
835
# Call "handle_ipc" for both data and EOF events
836
gobject.io_add_watch(self.pipe[0],
837
gobject.IO_IN | gobject.IO_HUP,
838
self.handle_ipc)
839
def handle_ipc(source, condition):
1369
self.child_pipe.close()
1370
self.add_pipe(parent_pipe)
1371
1372
def add_pipe(self, parent_pipe):
840
1373
"""Dummy function; override as necessary"""
841
os.close(source)
842
return False
843
844
845
class IPv6_TCPServer(ForkingMixInWithPipe,
846
SocketServer.TCPServer, object):
1374
pass
1375
1376
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1377
socketserver.TCPServer, object):
847
1378
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1379
848
1380
Attributes:
849
settings: Server settings
850
clients: Set() of Client objects
851
1381
enabled: Boolean; whether this server is activated yet
1382
interface: None or a network interface name (string)
1383
use_ipv6: Boolean; to use IPv6 or not
852
1384
"""
853
address_family = socket.AF_INET6
854
def __init__(self, *args, **kwargs):
855
if "settings" in kwargs:
856
self.settings = kwargs["settings"]
857
del kwargs["settings"]
858
if "clients" in kwargs:
859
self.clients = kwargs["clients"]
860
del kwargs["clients"]
861
if "use_ipv6" in kwargs:
862
if not kwargs["use_ipv6"]:
863
self.address_family = socket.AF_INET
864
del kwargs["use_ipv6"]
865
self.enabled = False
866
super(IPv6_TCPServer, self).__init__(*args, **kwargs)
1385
def __init__(self, server_address, RequestHandlerClass,
1386
interface=None, use_ipv6=True):
1387
self.interface = interface
1388
if use_ipv6:
1389
self.address_family = socket.AF_INET6
1390
socketserver.TCPServer.__init__(self, server_address,
1391
RequestHandlerClass)
867
1392
def server_bind(self):
868
1393
"""This overrides the normal server_bind() function
869
1394
to bind to an interface if one was specified, and also NOT to
870
1395
bind to an address or port if they were not specified."""
871
if self.settings["interface"]:
872
# 25 is from /usr/include/asm-i486/socket.h
873
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
874
try:
875
self.socket.setsockopt(socket.SOL_SOCKET,
876
SO_BINDTODEVICE,
877
self.settings["interface"])
878
except socket.error, error:
879
if error[0] == errno.EPERM:
880
logger.error(u"No permission to"
881
u" bind to interface %s",
882
self.settings["interface"])
883
else:
884
raise
1396
if self.interface is not None:
1397
if SO_BINDTODEVICE is None:
1398
logger.error(u"SO_BINDTODEVICE does not exist;"
1399
u" cannot bind to interface %s",
1400
self.interface)
1401
else:
1402
try:
1403
self.socket.setsockopt(socket.SOL_SOCKET,
1404
SO_BINDTODEVICE,
1405
str(self.interface
1406
+ u'\0'))
1407
except socket.error, error:
1408
if error[0] == errno.EPERM:
1409
logger.error(u"No permission to"
1410
u" bind to interface %s",
1411
self.interface)
1412
elif error[0] == errno.ENOPROTOOPT:
1413
logger.error(u"SO_BINDTODEVICE not available;"
1414
u" cannot bind to interface %s",
1415
self.interface)
1416
else:
1417
raise
885
1418
# Only bind(2) the socket if we really need to.
886
1419
if self.server_address[0] or self.server_address[1]:
887
1420
if not self.server_address[0]:
888
1421
if self.address_family == socket.AF_INET6:
889
any_address = "::" # in6addr_any
1422
any_address = u"::" # in6addr_any
890
1423
else:
891
1424
any_address = socket.INADDR_ANY
892
1425
self.server_address = (any_address,
894
1427
elif not self.server_address[1]:
895
1428
self.server_address = (self.server_address[0],
896
1429
0)
897
# if self.settings["interface"]:
1430
# if self.interface:
898
1431
# self.server_address = (self.server_address[0],
899
1432
# 0, # port
900
1433
# 0, # flowinfo
901
1434
# if_nametoindex
902
# (self.settings
903
# ["interface"]))
904
return super(IPv6_TCPServer, self).server_bind()
1435
# (self.interface))
1436
return socketserver.TCPServer.server_bind(self)
1437
1438
1439
class MandosServer(IPv6_TCPServer):
1440
"""Mandos server.
1441
1442
Attributes:
1443
clients: set of Client objects
1444
gnutls_priority GnuTLS priority string
1445
use_dbus: Boolean; to emit D-Bus signals or not
1446
1447
Assumes a gobject.MainLoop event loop.
1448
"""
1449
def __init__(self, server_address, RequestHandlerClass,
1450
interface=None, use_ipv6=True, clients=None,
1451
gnutls_priority=None, use_dbus=True):
1452
self.enabled = False
1453
self.clients = clients
1454
if self.clients is None:
1455
self.clients = set()
1456
self.use_dbus = use_dbus
1457
self.gnutls_priority = gnutls_priority
1458
IPv6_TCPServer.__init__(self, server_address,
1459
RequestHandlerClass,
1460
interface = interface,
1461
use_ipv6 = use_ipv6)
905
1462
def server_activate(self):
906
1463
if self.enabled:
907
return super(IPv6_TCPServer, self).server_activate()
1464
return socketserver.TCPServer.server_activate(self)
908
1465
def enable(self):
909
1466
self.enabled = True
910
def handle_ipc(self, source, condition, file_objects={}):
1467
def add_pipe(self, parent_pipe):
1468
# Call "handle_ipc" for both data and EOF events
1469
gobject.io_add_watch(parent_pipe.fileno(),
1470
gobject.IO_IN | gobject.IO_HUP,
1471
functools.partial(self.handle_ipc,
1472
parent_pipe = parent_pipe))
1473
1474
def handle_ipc(self, source, condition, parent_pipe=None,
1475
client_object=None):
911
1476
condition_names = {
912
gobject.IO_IN: "IN", # There is data to read.
913
gobject.IO_OUT: "OUT", # Data can be written (without
914
# blocking).
915
gobject.IO_PRI: "PRI", # There is urgent data to read.
916
gobject.IO_ERR: "ERR", # Error condition.
917
gobject.IO_HUP: "HUP" # Hung up (the connection has been
918
# broken, usually for pipes and
919
# sockets).
1477
gobject.IO_IN: u"IN", # There is data to read.
1478
gobject.IO_OUT: u"OUT", # Data can be written (without
1479
# blocking).
1480
gobject.IO_PRI: u"PRI", # There is urgent data to read.
1481
gobject.IO_ERR: u"ERR", # Error condition.
1482
gobject.IO_HUP: u"HUP" # Hung up (the connection has been
1483
# broken, usually for pipes and
1484
# sockets).
920
1485
}
921
1486
conditions_string = ' | '.join(name
922
1487
for cond, name in
923
1488
condition_names.iteritems()
924
1489
if cond & condition)
925
logger.debug("Handling IPC: FD = %d, condition = %s", source,
926
conditions_string)
927
928
# Turn the pipe file descriptor into a Python file object
929
if source not in file_objects:
930
file_objects[source] = os.fdopen(source, "r", 1)
931
932
# Read a line from the file object
933
cmdline = file_objects[source].readline()
934
if not cmdline: # Empty line means end of file
935
# close the IPC pipe
936
file_objects[source].close()
937
del file_objects[source]
1490
# error or the other end of multiprocessing.Pipe has closed
1491
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
1492
return False
1493
1494
# Read a request from the child
1495
request = parent_pipe.recv()
1496
command = request[0]
1497
1498
if command == 'init':
1499
fpr = request[1]
1500
address = request[2]
938
1501
939
# Stop calling this function
940
return False
941
942
logger.debug("IPC command: %r\n" % cmdline)
943
944
# Parse and act on command
945
cmd, args = cmdline.split(None, 1)
946
if cmd == "NOTFOUND":
947
if self.settings["use_dbus"]:
948
# Emit D-Bus signal
949
mandos_dbus_service.ClientNotFound(args)
950
elif cmd == "INVALID":
951
if self.settings["use_dbus"]:
952
for client in self.clients:
953
if client.name == args:
954
# Emit D-Bus signal
955
client.Rejected()
956
break
957
elif cmd == "SENDING":
958
for client in self.clients:
959
if client.name == args:
960
client.checked_ok()
961
if self.settings["use_dbus"]:
962
# Emit D-Bus signal
963
client.ReceivedSecret()
1502
for c in self.clients:
1503
if c.fingerprint == fpr:
1504
client = c
964
1505
break
965
else:
966
logger.error("Unknown IPC command: %r", cmdline)
1506
else:
1507
logger.warning(u"Client not found for fingerprint: %s, ad"
1508
u"dress: %s", fpr, address)
1509
if self.use_dbus:
1510
# Emit D-Bus signal
1511
mandos_dbus_service.ClientNotFound(fpr, address)
1512
parent_pipe.send(False)
1513
return False
1514
1515
gobject.io_add_watch(parent_pipe.fileno(),
1516
gobject.IO_IN | gobject.IO_HUP,
1517
functools.partial(self.handle_ipc,
1518
parent_pipe = parent_pipe,
1519
client_object = client))
1520
parent_pipe.send(True)
1521
# remove the old hook in favor of the new above hook on same fileno
1522
return False
1523
if command == 'funcall':
1524
funcname = request[1]
1525
args = request[2]
1526
kwargs = request[3]
1527
1528
parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))
1529
1530
if command == 'getattr':
1531
attrname = request[1]
1532
if callable(client_object.__getattribute__(attrname)):
1533
parent_pipe.send(('function',))
1534
else:
1535
parent_pipe.send(('data', client_object.__getattribute__(attrname)))
967
1536
968
# Keep calling this function
1537
if command == 'setattr':
1538
attrname = request[1]
1539
value = request[2]
1540
setattr(client_object, attrname, value)
1541
969
1542
return True
970
1543
971
1544
972
1545
def string_to_delta(interval):
973
1546
"""Parse a string and return a datetime.timedelta
974
1547
975
>>> string_to_delta('7d')
1548
>>> string_to_delta(u'7d')
976
1549
datetime.timedelta(7)
977
>>> string_to_delta('60s')
1550
>>> string_to_delta(u'60s')
978
1551
datetime.timedelta(0, 60)
979
>>> string_to_delta('60m')
1552
>>> string_to_delta(u'60m')
980
1553
datetime.timedelta(0, 3600)
981
>>> string_to_delta('24h')
1554
>>> string_to_delta(u'24h')
982
1555
datetime.timedelta(1)
983
1556
>>> string_to_delta(u'1w')
984
1557
datetime.timedelta(7)
985
>>> string_to_delta('5m 30s')
1558
>>> string_to_delta(u'5m 30s')
986
1559
datetime.timedelta(0, 330)
987
1560
"""
988
1561
timevalue = datetime.timedelta(0)
1001
1574
elif suffix == u"w":
1002
1575
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1003
1576
else:
1004
raise ValueError
1005
except (ValueError, IndexError):
1006
raise ValueError
1577
raise ValueError(u"Unknown suffix %r" % suffix)
1578
except (ValueError, IndexError), e:
1579
raise ValueError(e.message)
1007
1580
timevalue += delta
1008
1581
return timevalue
1009
1582
1010
1583
1011
def server_state_changed(state):
1012
"""Derived from the Avahi example code"""
1013
if state == avahi.SERVER_COLLISION:
1014
logger.error(u"Zeroconf server name collision")
1015
service.remove()
1016
elif state == avahi.SERVER_RUNNING:
1017
service.add()
1018
1019
1020
def entry_group_state_changed(state, error):
1021
"""Derived from the Avahi example code"""
1022
logger.debug(u"Avahi state change: %i", state)
1023
1024
if state == avahi.ENTRY_GROUP_ESTABLISHED:
1025
logger.debug(u"Zeroconf service established.")
1026
elif state == avahi.ENTRY_GROUP_COLLISION:
1027
logger.warning(u"Zeroconf service name collision.")
1028
service.rename()
1029
elif state == avahi.ENTRY_GROUP_FAILURE:
1030
logger.critical(u"Avahi: Error in group state changed %s",
1031
unicode(error))
1032
raise AvahiGroupError(u"State changed: %s" % unicode(error))
1033
1034
1584
def if_nametoindex(interface):
1035
"""Call the C function if_nametoindex(), or equivalent"""
1585
"""Call the C function if_nametoindex(), or equivalent
1586
1587
Note: This function cannot accept a unicode string."""
1036
1588
global if_nametoindex
1037
1589
try:
1038
1590
if_nametoindex = (ctypes.cdll.LoadLibrary
1039
(ctypes.util.find_library("c"))
1591
(ctypes.util.find_library(u"c"))
1040
1592
.if_nametoindex)
1041
1593
except (OSError, AttributeError):
1042
if "struct" not in sys.modules:
1043
import struct
1044
if "fcntl" not in sys.modules:
1045
import fcntl
1594
logger.warning(u"Doing if_nametoindex the hard way")
1046
1595
def if_nametoindex(interface):
1047
1596
"Get an interface index the hard way, i.e. using fcntl()"
1048
1597
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1049
with closing(socket.socket()) as s:
1598
with contextlib.closing(socket.socket()) as s:
1050
1599
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1051
struct.pack("16s16x", interface))
1052
interface_index = struct.unpack("I", ifreq[16:20])[0]
1600
struct.pack(str(u"16s16x"),
1601
interface))
1602
interface_index = struct.unpack(str(u"I"),
1603
ifreq[16:20])[0]
1053
1604
return interface_index
1054
1605
return if_nametoindex(interface)
1055
1606
1056
1607
1057
1608
def daemon(nochdir = False, noclose = False):
1058
1609
"""See daemon(3). Standard BSD Unix function.
1610
1059
1611
This should really exist as os.daemon, but it doesn't (yet)."""
1060
1612
if os.fork():
1061
1613
sys.exit()
1062
1614
os.setsid()
1063
1615
if not nochdir:
1064
os.chdir("/")
1616
os.chdir(u"/")
1065
1617
if os.fork():
1066
1618
sys.exit()
1067
1619
if not noclose:
1069
1621
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1070
1622
if not stat.S_ISCHR(os.fstat(null).st_mode):
1071
1623
raise OSError(errno.ENODEV,
1072
"/dev/null not a character device")
1624
u"%s not a character device"
1625
% os.path.devnull)
1073
1626
os.dup2(null, sys.stdin.fileno())
1074
1627
os.dup2(null, sys.stdout.fileno())
1075
1628
os.dup2(null, sys.stderr.fileno())
1079
1632
1080
1633
def main():
1081
1634
1082
######################################################################
1635
##################################################################
1083
1636
# Parsing of options, both command line and config file
1084
1637
1085
1638
parser = optparse.OptionParser(version = "%%prog %s" % version)
1086
parser.add_option("-i", "--interface", type="string",
1087
metavar="IF", help="Bind to interface IF")
1088
parser.add_option("-a", "--address", type="string",
1089
help="Address to listen for requests on")
1090
parser.add_option("-p", "--port", type="int",
1091
help="Port number to receive requests on")
1092
parser.add_option("--check", action="store_true",
1093
help="Run self-test")
1094
parser.add_option("--debug", action="store_true",
1095
help="Debug mode; run in foreground and log to"
1096
" terminal")
1097
parser.add_option("--priority", type="string", help="GnuTLS"
1098
" priority string (see GnuTLS documentation)")
1099
parser.add_option("--servicename", type="string", metavar="NAME",
1100
help="Zeroconf service name")
1101
parser.add_option("--configdir", type="string",
1102
default="/etc/mandos", metavar="DIR",
1103
help="Directory to search for configuration"
1104
" files")
1105
parser.add_option("--no-dbus", action="store_false",
1106
dest="use_dbus",
1107
help="Do not provide D-Bus system bus"
1108
" interface")
1109
parser.add_option("--no-ipv6", action="store_false",
1110
dest="use_ipv6", help="Do not use IPv6")
1639
parser.add_option("-i", u"--interface", type=u"string",
1640
metavar="IF", help=u"Bind to interface IF")
1641
parser.add_option("-a", u"--address", type=u"string",
1642
help=u"Address to listen for requests on")
1643
parser.add_option("-p", u"--port", type=u"int",
1644
help=u"Port number to receive requests on")
1645
parser.add_option("--check", action=u"store_true",
1646
help=u"Run self-test")
1647
parser.add_option("--debug", action=u"store_true",
1648
help=u"Debug mode; run in foreground and log to"
1649
u" terminal")
1650
parser.add_option("--debuglevel", type=u"string", metavar="Level",
1651
help=u"Debug level for stdout output")
1652
parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1653
u" priority string (see GnuTLS documentation)")
1654
parser.add_option("--servicename", type=u"string",
1655
metavar=u"NAME", help=u"Zeroconf service name")
1656
parser.add_option("--configdir", type=u"string",
1657
default=u"/etc/mandos", metavar=u"DIR",
1658
help=u"Directory to search for configuration"
1659
u" files")
1660
parser.add_option("--no-dbus", action=u"store_false",
1661
dest=u"use_dbus", help=u"Do not provide D-Bus"
1662
u" system bus interface")
1663
parser.add_option("--no-ipv6", action=u"store_false",
1664
dest=u"use_ipv6", help=u"Do not use IPv6")
1111
1665
options = parser.parse_args()[0]
1112
1666
1113
1667
if options.check:
1116
1670
sys.exit()
1117
1671
1118
1672
# Default values for config file for server-global settings
1119
server_defaults = { "interface": "",
1120
"address": "",
1121
"port": "",
1122
"debug": "False",
1123
"priority":
1124
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1125
"servicename": "Mandos",
1126
"use_dbus": "True",
1127
"use_ipv6": "True",
1673
server_defaults = { u"interface": u"",
1674
u"address": u"",
1675
u"port": u"",
1676
u"debug": u"False",
1677
u"priority":
1678
u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1679
u"servicename": u"Mandos",
1680
u"use_dbus": u"True",
1681
u"use_ipv6": u"True",
1682
u"debuglevel": u"",
1128
1683
}
1129
1684
1130
1685
# Parse config file for server-global settings
1131
server_config = ConfigParser.SafeConfigParser(server_defaults)
1686
server_config = configparser.SafeConfigParser(server_defaults)
1132
1687
del server_defaults
1133
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1688
server_config.read(os.path.join(options.configdir,
1689
u"mandos.conf"))
1134
1690
# Convert the SafeConfigParser object to a dict
1135
1691
server_settings = server_config.defaults()
1136
1692
# Use the appropriate methods on the non-string config options
1137
server_settings["debug"] = server_config.getboolean("DEFAULT",
1138
"debug")
1139
server_settings["use_dbus"] = server_config.getboolean("DEFAULT",
1140
"use_dbus")
1141
server_settings["use_ipv6"] = server_config.getboolean("DEFAULT",
1142
"use_ipv6")
1693
for option in (u"debug", u"use_dbus", u"use_ipv6"):
1694
server_settings[option] = server_config.getboolean(u"DEFAULT",
1695
option)
1143
1696
if server_settings["port"]:
1144
server_settings["port"] = server_config.getint("DEFAULT",
1145
"port")
1697
server_settings["port"] = server_config.getint(u"DEFAULT",
1698
u"port")
1146
1699
del server_config
1147
1700
1148
1701
# Override the settings from the config file with command line
1149
1702
# options, if set.
1150
for option in ("interface", "address", "port", "debug",
1151
"priority", "servicename", "configdir",
1152
"use_dbus", "use_ipv6"):
1703
for option in (u"interface", u"address", u"port", u"debug",
1704
u"priority", u"servicename", u"configdir",
1705
u"use_dbus", u"use_ipv6", u"debuglevel"):
1153
1706
value = getattr(options, option)
1154
1707
if value is not None:
1155
1708
server_settings[option] = value
1156
1709
del options
1710
# Force all strings to be unicode
1711
for option in server_settings.keys():
1712
if type(server_settings[option]) is str:
1713
server_settings[option] = unicode(server_settings[option])
1157
1714
# Now we have our good server settings in "server_settings"
1158
1715
1159
1716
##################################################################
1160
1717
1161
1718
# For convenience
1162
debug = server_settings["debug"]
1163
use_dbus = server_settings["use_dbus"]
1164
use_ipv6 = server_settings["use_ipv6"]
1165
1166
if not debug:
1167
syslogger.setLevel(logging.WARNING)
1168
console.setLevel(logging.WARNING)
1169
1170
if server_settings["servicename"] != "Mandos":
1719
debug = server_settings[u"debug"]
1720
debuglevel = server_settings[u"debuglevel"]
1721
use_dbus = server_settings[u"use_dbus"]
1722
use_ipv6 = server_settings[u"use_ipv6"]
1723
1724
if server_settings[u"servicename"] != u"Mandos":
1171
1725
syslogger.setFormatter(logging.Formatter
1172
('Mandos (%s) [%%(process)d]:'
1173
' %%(levelname)s: %%(message)s'
1174
% server_settings["servicename"]))
1726
(u'Mandos (%s) [%%(process)d]:'
1727
u' %%(levelname)s: %%(message)s'
1728
% server_settings[u"servicename"]))
1175
1729
1176
1730
# Parse config file with clients
1177
client_defaults = { "timeout": "1h",
1178
"interval": "5m",
1179
"checker": "fping -q -- %%(host)s",
1180
"host": "",
1731
client_defaults = { u"timeout": u"1h",
1732
u"interval": u"5m",
1733
u"checker": u"fping -q -- %%(host)s",
1734
u"host": u"",
1735
u"approval_delay": u"0s",
1736
u"approval_duration": u"1s",
1181
1737
}
1182
client_config = ConfigParser.SafeConfigParser(client_defaults)
1183
client_config.read(os.path.join(server_settings["configdir"],
1184
"clients.conf"))
1185
1738
client_config = configparser.SafeConfigParser(client_defaults)
1739
client_config.read(os.path.join(server_settings[u"configdir"],
1740
u"clients.conf"))
1741
1186
1742
global mandos_dbus_service
1187
1743
mandos_dbus_service = None
1188
1744
1189
clients = Set()
1190
tcp_server = IPv6_TCPServer((server_settings["address"],
1191
server_settings["port"]),
1192
TCP_handler,
1193
settings=server_settings,
1194
clients=clients, use_ipv6=use_ipv6)
1195
pidfilename = "/var/run/mandos.pid"
1745
tcp_server = MandosServer((server_settings[u"address"],
1746
server_settings[u"port"]),
1747
ClientHandler,
1748
interface=(server_settings[u"interface"]
1749
or None),
1750
use_ipv6=use_ipv6,
1751
gnutls_priority=
1752
server_settings[u"priority"],
1753
use_dbus=use_dbus)
1754
pidfilename = u"/var/run/mandos.pid"
1196
1755
try:
1197
pidfile = open(pidfilename, "w")
1756
pidfile = open(pidfilename, u"w")
1198
1757
except IOError:
1199
logger.error("Could not open file %r", pidfilename)
1758
logger.error(u"Could not open file %r", pidfilename)
1200
1759
1201
1760
try:
1202
uid = pwd.getpwnam("_mandos").pw_uid
1203
gid = pwd.getpwnam("_mandos").pw_gid
1761
uid = pwd.getpwnam(u"_mandos").pw_uid
1762
gid = pwd.getpwnam(u"_mandos").pw_gid
1204
1763
except KeyError:
1205
1764
try:
1206
uid = pwd.getpwnam("mandos").pw_uid
1207
gid = pwd.getpwnam("mandos").pw_gid
1765
uid = pwd.getpwnam(u"mandos").pw_uid
1766
gid = pwd.getpwnam(u"mandos").pw_gid
1208
1767
except KeyError:
1209
1768
try:
1210
uid = pwd.getpwnam("nobody").pw_uid
1211
gid = pwd.getpwnam("nogroup").pw_gid
1769
uid = pwd.getpwnam(u"nobody").pw_uid
1770
gid = pwd.getpwnam(u"nobody").pw_gid
1212
1771
except KeyError:
1213
1772
uid = 65534
1214
1773
gid = 65534
1219
1778
if error[0] != errno.EPERM:
1220
1779
raise error
1221
1780
1222
# Enable all possible GnuTLS debugging
1781
if not debug and not debuglevel:
1782
syslogger.setLevel(logging.WARNING)
1783
console.setLevel(logging.WARNING)
1784
if debuglevel:
1785
level = getattr(logging, debuglevel.upper())
1786
syslogger.setLevel(level)
1787
console.setLevel(level)
1788
1223
1789
if debug:
1790
# Enable all possible GnuTLS debugging
1791
1224
1792
# "Use a log level over 10 to enable all debugging options."
1225
1793
# - GnuTLS manual
1226
1794
gnutls.library.functions.gnutls_global_set_log_level(11)
1227
1795
1228
1796
@gnutls.library.types.gnutls_log_func
1229
1797
def debug_gnutls(level, string):
1230
logger.debug("GnuTLS: %s", string[:-1])
1798
logger.debug(u"GnuTLS: %s", string[:-1])
1231
1799
1232
1800
(gnutls.library.functions
1233
1801
.gnutls_global_set_log_function(debug_gnutls))
1802
1803
# Redirect stdin so all checkers get /dev/null
1804
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1805
os.dup2(null, sys.stdin.fileno())
1806
if null > 2:
1807
os.close(null)
1808
else:
1809
# No console logging
1810
logger.removeHandler(console)
1234
1811
1235
global service
1236
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1237
service = AvahiService(name = server_settings["servicename"],
1238
servicetype = "_mandos._tcp",
1239
protocol = protocol)
1240
if server_settings["interface"]:
1241
service.interface = (if_nametoindex
1242
(server_settings["interface"]))
1243
1812
1244
1813
global main_loop
1245
global bus
1246
global server
1247
1814
# From the Avahi example code
1248
1815
DBusGMainLoop(set_as_default=True )
1249
1816
main_loop = gobject.MainLoop()
1250
1817
bus = dbus.SystemBus()
1251
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
1252
avahi.DBUS_PATH_SERVER),
1253
avahi.DBUS_INTERFACE_SERVER)
1254
1818
# End of Avahi example code
1255
1819
if use_dbus:
1256
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
1820
try:
1821
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos",
1822
bus, do_not_queue=True)
1823
except dbus.exceptions.NameExistsException, e:
1824
logger.error(unicode(e) + u", disabling D-Bus")
1825
use_dbus = False
1826
server_settings[u"use_dbus"] = False
1827
tcp_server.use_dbus = False
1828
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1829
service = AvahiService(name = server_settings[u"servicename"],
1830
servicetype = u"_mandos._tcp",
1831
protocol = protocol, bus = bus)
1832
if server_settings["interface"]:
1833
service.interface = (if_nametoindex
1834
(str(server_settings[u"interface"])))
1835
1836
if not debug:
1837
# Close all input and output, do double fork, etc.
1838
daemon()
1839
1840
global multiprocessing_manager
1841
multiprocessing_manager = multiprocessing.Manager()
1257
1842
1258
1843
client_class = Client
1259
1844
if use_dbus:
1260
client_class = ClientDBus
1261
clients.update(Set(
1845
client_class = functools.partial(ClientDBus, bus = bus)
1846
def client_config_items(config, section):
1847
special_settings = {
1848
"approved_by_default":
1849
lambda: config.getboolean(section,
1850
"approved_by_default"),
1851
}
1852
for name, value in config.items(section):
1853
try:
1854
yield (name, special_settings[name]())
1855
except KeyError:
1856
yield (name, value)
1857
1858
tcp_server.clients.update(set(
1262
1859
client_class(name = section,
1263
config= dict(client_config.items(section)))
1860
config= dict(client_config_items(
1861
client_config, section)))
1264
1862
for section in client_config.sections()))
1265
if not clients:
1863
if not tcp_server.clients:
1266
1864
logger.warning(u"No clients defined")
1267
1268
if debug:
1269
# Redirect stdin so all checkers get /dev/null
1270
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1271
os.dup2(null, sys.stdin.fileno())
1272
if null > 2:
1273
os.close(null)
1274
else:
1275
# No console logging
1276
logger.removeHandler(console)
1277
# Close all input and output, do double fork, etc.
1278
daemon()
1279
1865
1280
1866
try:
1281
with closing(pidfile):
1867
with pidfile:
1282
1868
pid = os.getpid()
1283
1869
pidfile.write(str(pid) + "\n")
1284
1870
del pidfile
1290
1876
pass
1291
1877
del pidfilename
1292
1878
1293
def cleanup():
1294
"Cleanup function; run on exit"
1295
global group
1296
# From the Avahi example code
1297
if not group is None:
1298
group.Free()
1299
group = None
1300
# End of Avahi example code
1301
1302
while clients:
1303
client = clients.pop()
1304
client.disable_hook = None
1305
client.disable()
1306
1307
atexit.register(cleanup)
1308
1309
1879
if not debug:
1310
1880
signal.signal(signal.SIGINT, signal.SIG_IGN)
1311
1881
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1315
1885
class MandosDBusService(dbus.service.Object):
1316
1886
"""A D-Bus proxy object"""
1317
1887
def __init__(self):
1318
dbus.service.Object.__init__(self, bus, "/")
1888
dbus.service.Object.__init__(self, bus, u"/")
1319
1889
_interface = u"se.bsnet.fukt.Mandos"
1320
1890
1321
@dbus.service.signal(_interface, signature="oa{sv}")
1322
def ClientAdded(self, objpath, properties):
1323
"D-Bus signal"
1324
pass
1325
1326
@dbus.service.signal(_interface, signature="s")
1327
def ClientNotFound(self, fingerprint):
1328
"D-Bus signal"
1329
pass
1330
1331
@dbus.service.signal(_interface, signature="os")
1891
@dbus.service.signal(_interface, signature=u"o")
1892
def ClientAdded(self, objpath):
1893
"D-Bus signal"
1894
pass
1895
1896
@dbus.service.signal(_interface, signature=u"ss")
1897
def ClientNotFound(self, fingerprint, address):
1898
"D-Bus signal"
1899
pass
1900
1901
@dbus.service.signal(_interface, signature=u"os")
1332
1902
def ClientRemoved(self, objpath, name):
1333
1903
"D-Bus signal"
1334
1904
pass
1335
1905
1336
@dbus.service.method(_interface, out_signature="ao")
1906
@dbus.service.method(_interface, out_signature=u"ao")
1337
1907
def GetAllClients(self):
1338
1908
"D-Bus method"
1339
return dbus.Array(c.dbus_object_path for c in clients)
1909
return dbus.Array(c.dbus_object_path
1910
for c in tcp_server.clients)
1340
1911
1341
@dbus.service.method(_interface, out_signature="a{oa{sv}}")
1912
@dbus.service.method(_interface,
1913
out_signature=u"a{oa{sv}}")
1342
1914
def GetAllClientsWithProperties(self):
1343
1915
"D-Bus method"
1344
1916
return dbus.Dictionary(
1345
((c.dbus_object_path, c.GetAllProperties())
1346
for c in clients),
1347
signature="oa{sv}")
1917
((c.dbus_object_path, c.GetAll(u""))
1918
for c in tcp_server.clients),
1919
signature=u"oa{sv}")
1348
1920
1349
@dbus.service.method(_interface, in_signature="o")
1921
@dbus.service.method(_interface, in_signature=u"o")
1350
1922
def RemoveClient(self, object_path):
1351
1923
"D-Bus method"
1352
for c in clients:
1924
for c in tcp_server.clients:
1353
1925
if c.dbus_object_path == object_path:
1354
clients.remove(c)
1926
tcp_server.clients.remove(c)
1355
1927
c.remove_from_connection()
1356
1928
# Don't signal anything except ClientRemoved
1357
c.disable(signal=False)
1929
c.disable(quiet=True)
1358
1930
# Emit D-Bus signal
1359
1931
self.ClientRemoved(object_path, c.name)
1360
1932
return
1361
raise KeyError
1933
raise KeyError(object_path)
1362
1934
1363
1935
del _interface
1364
1936
1365
1937
mandos_dbus_service = MandosDBusService()
1366
1938
1367
for client in clients:
1939
def cleanup():
1940
"Cleanup function; run on exit"
1941
service.cleanup()
1942
1943
while tcp_server.clients:
1944
client = tcp_server.clients.pop()
1945
if use_dbus:
1946
client.remove_from_connection()
1947
client.disable_hook = None
1948
# Don't signal anything except ClientRemoved
1949
client.disable(quiet=True)
1950
if use_dbus:
1951
# Emit D-Bus signal
1952
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
1953
client.name)
1954
1955
atexit.register(cleanup)
1956
1957
for client in tcp_server.clients:
1368
1958
if use_dbus:
1369
1959
# Emit D-Bus signal
1370
mandos_dbus_service.ClientAdded(client.dbus_object_path,
1371
client.GetAllProperties())
1960
mandos_dbus_service.ClientAdded(client.dbus_object_path)
1372
1961
client.enable()
1373
1962
1374
1963
tcp_server.enable()
1388
1977
1389
1978
try:
1390
1979
# From the Avahi example code
1391
server.connect_to_signal("StateChanged", server_state_changed)
1392
1980
try:
1393
server_state_changed(server.GetState())
1981
service.activate()
1394
1982
except dbus.exceptions.DBusException, error:
1395
1983
logger.critical(u"DBusException: %s", error)
1984
cleanup()
1396
1985
sys.exit(1)
1397
1986
# End of Avahi example code
1398
1987
1405
1994
main_loop.run()
1406
1995
except AvahiError, error:
1407
1996
logger.critical(u"AvahiError: %s", error)
1997
cleanup()
1408
1998
sys.exit(1)
1409
1999
except KeyboardInterrupt:
1410
2000
if debug:
1411
2001
print >> sys.stderr
1412
logger.debug("Server received KeyboardInterrupt")
1413
logger.debug("Server exiting")
2002
logger.debug(u"Server received KeyboardInterrupt")
2003
logger.debug(u"Server exiting")
2004
# Must run before the D-Bus bus name gets deregistered
2005
cleanup()
1414
2006
1415
2007
if __name__ == '__main__':
1416
2008
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0