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- Committer: Teddy Hogeborn
- Date: 2008-01-18 20:11:37 UTC
- Revision ID: teddy@fukt.bsnet.se-20080118201137-oxhupsfl5ut9cjz5
* server.py (server_metaclass): New.
(IPv6_UDPServer, IPv6_TCPServer): Use "server_metaclass" instead of
"server_bind" and "init_with_options". Removed "address_family" and
"allow_reuse_address", since they are now added in "server_metaclass".
(server_bind, init_with_options): Removed.
(main): Pass "options" to Client constructor.
(Client.__init__): Take an "options" parameter and use it.
(IPv6_UDPServer, IPv6_TCPServer): Use "server_metaclass" instead of
"server_bind" and "init_with_options". Removed "address_family" and
"allow_reuse_address", since they are now added in "server_metaclass".
(server_bind, init_with_options): Removed.
(main): Pass "options" to Client constructor.
(Client.__init__): Take an "options" parameter and use it.
- files added:
- bad-ca.pem
- files removed:
- .bzr-builddeb
- debian
- debian/po
- plugins.d
- files renamed:
- clients.conf => mandos-clients.conf
- mandos => server.py
- files modified:
- Makefile
added
removed
server.py
1
1
#!/usr/bin/python
2
# -*- mode: python; coding: utf-8 -*-
3
#
4
# Mandos server - give out binary blobs to connecting clients.
5
#
6
# This program is partly derived from an example program for an Avahi
7
# service publisher, downloaded from
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".
12
#
13
# Everything else is
14
# Copyright © 2008,2009 Teddy Hogeborn
15
# Copyright © 2008,2009 Björn Påhlsson
16
#
17
# This program is free software: you can redistribute it and/or modify
18
# it under the terms of the GNU General Public License as published by
19
# the Free Software Foundation, either version 3 of the License, or
20
# (at your option) any later version.
21
#
22
# This program is distributed in the hope that it will be useful,
23
# but WITHOUT ANY WARRANTY; without even the implied warranty of
24
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
25
# GNU General Public License for more details.
26
#
27
# You should have received a copy of the GNU General Public License
28
# along with this program. If not, see
29
# <http://www.gnu.org/licenses/>.
30
#
31
# Contact the authors at <mandos@fukt.bsnet.se>.
32
#
33
34
from __future__ import division, with_statement, absolute_import
35
36
import SocketServer as socketserver
2
3
import SocketServer
37
4
import socket
38
import optparse
5
import select
6
from optparse import OptionParser
39
7
import datetime
40
8
import errno
41
9
import gnutls.crypto
42
10
import gnutls.connection
43
11
import gnutls.errors
44
import gnutls.library.functions
45
import gnutls.library.constants
46
import gnutls.library.types
47
import ConfigParser as configparser
12
import ConfigParser
48
13
import sys
49
import re
50
import os
51
import signal
52
import subprocess
53
import atexit
54
import stat
55
import logging
56
import logging.handlers
57
import pwd
58
from contextlib import closing
59
import struct
60
import fcntl
61
import functools
62
63
import dbus
64
import dbus.service
65
import gobject
66
import avahi
67
from dbus.mainloop.glib import DBusGMainLoop
68
import ctypes
69
import ctypes.util
70
import xml.dom.minidom
71
import inspect
72
73
try:
74
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
75
except AttributeError:
76
try:
77
from IN import SO_BINDTODEVICE
78
except ImportError:
79
SO_BINDTODEVICE = None
80
81
82
version = "1.0.12"
83
84
logger = logging.Logger(u'mandos')
85
syslogger = (logging.handlers.SysLogHandler
86
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
87
address = "/dev/log"))
88
syslogger.setFormatter(logging.Formatter
89
(u'Mandos [%(process)d]: %(levelname)s:'
90
u' %(message)s'))
91
logger.addHandler(syslogger)
92
93
console = logging.StreamHandler()
94
console.setFormatter(logging.Formatter(u'%(name)s [%(process)d]:'
95
u' %(levelname)s:'
96
u' %(message)s'))
97
logger.addHandler(console)
98
99
class AvahiError(Exception):
100
def __init__(self, value, *args, **kwargs):
101
self.value = value
102
super(AvahiError, self).__init__(value, *args, **kwargs)
103
def __unicode__(self):
104
return unicode(repr(self.value))
105
106
class AvahiServiceError(AvahiError):
107
pass
108
109
class AvahiGroupError(AvahiError):
110
pass
111
112
113
class AvahiService(object):
114
"""An Avahi (Zeroconf) service.
115
116
Attributes:
117
interface: integer; avahi.IF_UNSPEC or an interface index.
118
Used to optionally bind to the specified interface.
119
name: string; Example: u'Mandos'
120
type: string; Example: u'_mandos._tcp'.
121
See <http://www.dns-sd.org/ServiceTypes.html>
122
port: integer; what port to announce
123
TXT: list of strings; TXT record for the service
124
domain: string; Domain to publish on, default to .local if empty.
125
host: string; Host to publish records for, default is localhost
126
max_renames: integer; maximum number of renames
127
rename_count: integer; counter so we only rename after collisions
128
a sensible number of times
129
group: D-Bus Entry Group
130
server: D-Bus Server
131
bus: dbus.SystemBus()
132
"""
133
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
134
servicetype = None, port = None, TXT = None,
135
domain = u"", host = u"", max_renames = 32768,
136
protocol = avahi.PROTO_UNSPEC, bus = None):
137
self.interface = interface
138
self.name = name
139
self.type = servicetype
140
self.port = port
141
self.TXT = TXT if TXT is not None else []
142
self.domain = domain
143
self.host = host
144
self.rename_count = 0
145
self.max_renames = max_renames
146
self.protocol = protocol
147
self.group = None # our entry group
148
self.server = None
149
self.bus = bus
150
def rename(self):
151
"""Derived from the Avahi example code"""
152
if self.rename_count >= self.max_renames:
153
logger.critical(u"No suitable Zeroconf service name found"
154
u" after %i retries, exiting.",
155
self.rename_count)
156
raise AvahiServiceError(u"Too many renames")
157
self.name = self.server.GetAlternativeServiceName(self.name)
158
logger.info(u"Changing Zeroconf service name to %r ...",
159
unicode(self.name))
160
syslogger.setFormatter(logging.Formatter
161
(u'Mandos (%s) [%%(process)d]:'
162
u' %%(levelname)s: %%(message)s'
163
% self.name))
164
self.remove()
165
self.add()
166
self.rename_count += 1
167
def remove(self):
168
"""Derived from the Avahi example code"""
169
if self.group is not None:
170
self.group.Reset()
171
def add(self):
172
"""Derived from the Avahi example code"""
173
if self.group is None:
174
self.group = dbus.Interface(
175
self.bus.get_object(avahi.DBUS_NAME,
176
self.server.EntryGroupNew()),
177
avahi.DBUS_INTERFACE_ENTRY_GROUP)
178
self.group.connect_to_signal('StateChanged',
179
self
180
.entry_group_state_changed)
181
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
182
self.name, self.type)
183
self.group.AddService(
184
self.interface,
185
self.protocol,
186
dbus.UInt32(0), # flags
187
self.name, self.type,
188
self.domain, self.host,
189
dbus.UInt16(self.port),
190
avahi.string_array_to_txt_array(self.TXT))
191
self.group.Commit()
192
def entry_group_state_changed(self, state, error):
193
"""Derived from the Avahi example code"""
194
logger.debug(u"Avahi state change: %i", state)
195
196
if state == avahi.ENTRY_GROUP_ESTABLISHED:
197
logger.debug(u"Zeroconf service established.")
198
elif state == avahi.ENTRY_GROUP_COLLISION:
199
logger.warning(u"Zeroconf service name collision.")
200
self.rename()
201
elif state == avahi.ENTRY_GROUP_FAILURE:
202
logger.critical(u"Avahi: Error in group state changed %s",
203
unicode(error))
204
raise AvahiGroupError(u"State changed: %s"
205
% unicode(error))
206
def cleanup(self):
207
"""Derived from the Avahi example code"""
208
if self.group is not None:
209
self.group.Free()
210
self.group = None
211
def server_state_changed(self, state):
212
"""Derived from the Avahi example code"""
213
if state == avahi.SERVER_COLLISION:
214
logger.error(u"Zeroconf server name collision")
215
self.remove()
216
elif state == avahi.SERVER_RUNNING:
217
self.add()
218
def activate(self):
219
"""Derived from the Avahi example code"""
220
if self.server is None:
221
self.server = dbus.Interface(
222
self.bus.get_object(avahi.DBUS_NAME,
223
avahi.DBUS_PATH_SERVER),
224
avahi.DBUS_INTERFACE_SERVER)
225
self.server.connect_to_signal(u"StateChanged",
226
self.server_state_changed)
227
self.server_state_changed(self.server.GetState())
228
14
229
15
230
16
class Client(object):
231
"""A representation of a client host served by this server.
232
233
Attributes:
234
name: string; from the config file, used in log messages and
235
D-Bus identifiers
236
fingerprint: string (40 or 32 hexadecimal digits); used to
237
uniquely identify the client
238
secret: bytestring; sent verbatim (over TLS) to client
239
host: string; available for use by the checker command
240
created: datetime.datetime(); (UTC) object creation
241
last_enabled: datetime.datetime(); (UTC)
242
enabled: bool()
243
last_checked_ok: datetime.datetime(); (UTC) or None
244
timeout: datetime.timedelta(); How long from last_checked_ok
245
until this client is invalid
246
interval: datetime.timedelta(); How often to start a new checker
247
disable_hook: If set, called by disable() as disable_hook(self)
248
checker: subprocess.Popen(); a running checker process used
249
to see if the client lives.
250
'None' if no process is running.
251
checker_initiator_tag: a gobject event source tag, or None
252
disable_initiator_tag: - '' -
253
checker_callback_tag: - '' -
254
checker_command: string; External command which is run to check if
255
client lives. %() expansions are done at
256
runtime with vars(self) as dict, so that for
257
instance %(name)s can be used in the command.
258
current_checker_command: string; current running checker_command
259
"""
260
261
@staticmethod
262
def _timedelta_to_milliseconds(td):
263
"Convert a datetime.timedelta() to milliseconds"
264
return ((td.days * 24 * 60 * 60 * 1000)
265
+ (td.seconds * 1000)
266
+ (td.microseconds // 1000))
267
268
def timeout_milliseconds(self):
269
"Return the 'timeout' attribute in milliseconds"
270
return self._timedelta_to_milliseconds(self.timeout)
271
272
def interval_milliseconds(self):
273
"Return the 'interval' attribute in milliseconds"
274
return self._timedelta_to_milliseconds(self.interval)
275
276
def __init__(self, name = None, disable_hook=None, config=None):
277
"""Note: the 'checker' key in 'config' sets the
278
'checker_command' attribute and *not* the 'checker'
279
attribute."""
17
def __init__(self, name=None, options=None, dn=None,
18
password=None, passfile=None, fqdn=None,
19
timeout=None, interval=-1):
280
20
self.name = name
281
if config is None:
282
config = {}
283
logger.debug(u"Creating client %r", self.name)
284
# Uppercase and remove spaces from fingerprint for later
285
# comparison purposes with return value from the fingerprint()
286
# function
287
self.fingerprint = (config[u"fingerprint"].upper()
288
.replace(u" ", u""))
289
logger.debug(u" Fingerprint: %s", self.fingerprint)
290
if u"secret" in config:
291
self.secret = config[u"secret"].decode(u"base64")
292
elif u"secfile" in config:
293
with closing(open(os.path.expanduser
294
(os.path.expandvars
295
(config[u"secfile"])))) as secfile:
296
self.secret = secfile.read()
297
else:
298
raise TypeError(u"No secret or secfile for client %s"
299
% self.name)
300
self.host = config.get(u"host", u"")
301
self.created = datetime.datetime.utcnow()
302
self.enabled = False
303
self.last_enabled = None
304
self.last_checked_ok = None
305
self.timeout = string_to_delta(config[u"timeout"])
306
self.interval = string_to_delta(config[u"interval"])
307
self.disable_hook = disable_hook
308
self.checker = None
309
self.checker_initiator_tag = None
310
self.disable_initiator_tag = None
311
self.checker_callback_tag = None
312
self.checker_command = config[u"checker"]
313
self.current_checker_command = None
314
self.last_connect = None
315
316
def enable(self):
317
"""Start this client's checker and timeout hooks"""
318
if getattr(self, u"enabled", False):
319
# Already enabled
320
return
321
self.last_enabled = datetime.datetime.utcnow()
322
# Schedule a new checker to be started an 'interval' from now,
323
# and every interval from then on.
324
self.checker_initiator_tag = (gobject.timeout_add
325
(self.interval_milliseconds(),
326
self.start_checker))
327
# Also start a new checker *right now*.
328
self.start_checker()
329
# Schedule a disable() when 'timeout' has passed
330
self.disable_initiator_tag = (gobject.timeout_add
331
(self.timeout_milliseconds(),
332
self.disable))
333
self.enabled = True
334
335
def disable(self):
336
"""Disable this client."""
337
if not getattr(self, "enabled", False):
338
return False
339
logger.info(u"Disabling client %s", self.name)
340
if getattr(self, u"disable_initiator_tag", False):
341
gobject.source_remove(self.disable_initiator_tag)
342
self.disable_initiator_tag = None
343
if getattr(self, u"checker_initiator_tag", False):
344
gobject.source_remove(self.checker_initiator_tag)
345
self.checker_initiator_tag = None
346
self.stop_checker()
347
if self.disable_hook:
348
self.disable_hook(self)
349
self.enabled = False
350
# Do not run this again if called by a gobject.timeout_add
351
return False
352
353
def __del__(self):
354
self.disable_hook = None
355
self.disable()
356
357
def checker_callback(self, pid, condition, command):
358
"""The checker has completed, so take appropriate actions."""
359
self.checker_callback_tag = None
360
self.checker = None
361
if os.WIFEXITED(condition):
362
exitstatus = os.WEXITSTATUS(condition)
363
if exitstatus == 0:
364
logger.info(u"Checker for %(name)s succeeded",
365
vars(self))
366
self.checked_ok()
367
else:
368
logger.info(u"Checker for %(name)s failed",
369
vars(self))
370
else:
371
logger.warning(u"Checker for %(name)s crashed?",
372
vars(self))
373
374
def checked_ok(self):
375
"""Bump up the timeout for this client.
376
377
This should only be called when the client has been seen,
378
alive and well.
379
"""
380
self.last_checked_ok = datetime.datetime.utcnow()
381
gobject.source_remove(self.disable_initiator_tag)
382
self.disable_initiator_tag = (gobject.timeout_add
383
(self.timeout_milliseconds(),
384
self.disable))
385
386
def start_checker(self):
387
"""Start a new checker subprocess if one is not running.
388
389
If a checker already exists, leave it running and do
390
nothing."""
391
# The reason for not killing a running checker is that if we
392
# did that, then if a checker (for some reason) started
393
# running slowly and taking more than 'interval' time, the
394
# client would inevitably timeout, since no checker would get
395
# a chance to run to completion. If we instead leave running
396
# checkers alone, the checker would have to take more time
397
# than 'timeout' for the client to be declared invalid, which
398
# is as it should be.
399
400
# If a checker exists, make sure it is not a zombie
401
if self.checker is not None:
402
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
403
if pid:
404
logger.warning(u"Checker was a zombie")
405
gobject.source_remove(self.checker_callback_tag)
406
self.checker_callback(pid, status,
407
self.current_checker_command)
408
# Start a new checker if needed
409
if self.checker is None:
410
try:
411
# In case checker_command has exactly one % operator
412
command = self.checker_command % self.host
413
except TypeError:
414
# Escape attributes for the shell
415
escaped_attrs = dict((key,
416
re.escape(unicode(str(val),
417
errors=
418
u'replace')))
419
for key, val in
420
vars(self).iteritems())
421
try:
422
command = self.checker_command % escaped_attrs
423
except TypeError, error:
424
logger.error(u'Could not format string "%s":'
425
u' %s', self.checker_command, error)
426
return True # Try again later
427
self.current_checker_command = command
428
try:
429
logger.info(u"Starting checker %r for %s",
430
command, self.name)
431
# We don't need to redirect stdout and stderr, since
432
# in normal mode, that is already done by daemon(),
433
# and in debug mode we don't want to. (Stdin is
434
# always replaced by /dev/null.)
435
self.checker = subprocess.Popen(command,
436
close_fds=True,
437
shell=True, cwd=u"/")
438
self.checker_callback_tag = (gobject.child_watch_add
439
(self.checker.pid,
440
self.checker_callback,
441
data=command))
442
# The checker may have completed before the gobject
443
# watch was added. Check for this.
444
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
445
if pid:
446
gobject.source_remove(self.checker_callback_tag)
447
self.checker_callback(pid, status, command)
448
except OSError, error:
449
logger.error(u"Failed to start subprocess: %s",
450
error)
451
# Re-run this periodically if run by gobject.timeout_add
452
return True
453
454
def stop_checker(self):
455
"""Force the checker process, if any, to stop."""
456
if self.checker_callback_tag:
457
gobject.source_remove(self.checker_callback_tag)
458
self.checker_callback_tag = None
459
if getattr(self, u"checker", None) is None:
460
return
461
logger.debug(u"Stopping checker for %(name)s", vars(self))
462
try:
463
os.kill(self.checker.pid, signal.SIGTERM)
464
#os.sleep(0.5)
465
#if self.checker.poll() is None:
466
# os.kill(self.checker.pid, signal.SIGKILL)
467
except OSError, error:
468
if error.errno != errno.ESRCH: # No such process
469
raise
470
self.checker = None
471
472
def still_valid(self):
473
"""Has the timeout not yet passed for this client?"""
474
if not getattr(self, u"enabled", False):
475
return False
476
now = datetime.datetime.utcnow()
477
if self.last_checked_ok is None:
478
return now < (self.created + self.timeout)
479
else:
480
return now < (self.last_checked_ok + self.timeout)
481
482
483
def dbus_service_property(dbus_interface, signature=u"v",
484
access=u"readwrite", byte_arrays=False):
485
"""Decorators for marking methods of a DBusObjectWithProperties to
486
become properties on the D-Bus.
487
488
The decorated method will be called with no arguments by "Get"
489
and with one argument by "Set".
490
491
The parameters, where they are supported, are the same as
492
dbus.service.method, except there is only "signature", since the
493
type from Get() and the type sent to Set() is the same.
494
"""
495
def decorator(func):
496
func._dbus_is_property = True
497
func._dbus_interface = dbus_interface
498
func._dbus_signature = signature
499
func._dbus_access = access
500
func._dbus_name = func.__name__
501
if func._dbus_name.endswith(u"_dbus_property"):
502
func._dbus_name = func._dbus_name[:-14]
503
func._dbus_get_args_options = {u'byte_arrays': byte_arrays }
504
return func
505
return decorator
506
507
508
class DBusPropertyException(dbus.exceptions.DBusException):
509
"""A base class for D-Bus property-related exceptions
510
"""
511
def __unicode__(self):
512
return unicode(str(self))
513
514
515
class DBusPropertyAccessException(DBusPropertyException):
516
"""A property's access permissions disallows an operation.
517
"""
518
pass
519
520
521
class DBusPropertyNotFound(DBusPropertyException):
522
"""An attempt was made to access a non-existing property.
523
"""
524
pass
525
526
527
class DBusObjectWithProperties(dbus.service.Object):
528
"""A D-Bus object with properties.
529
530
Classes inheriting from this can use the dbus_service_property
531
decorator to expose methods as D-Bus properties. It exposes the
532
standard Get(), Set(), and GetAll() methods on the D-Bus.
533
"""
534
535
@staticmethod
536
def _is_dbus_property(obj):
537
return getattr(obj, u"_dbus_is_property", False)
538
539
def _get_all_dbus_properties(self):
540
"""Returns a generator of (name, attribute) pairs
541
"""
542
return ((prop._dbus_name, prop)
543
for name, prop in
544
inspect.getmembers(self, self._is_dbus_property))
545
546
def _get_dbus_property(self, interface_name, property_name):
547
"""Returns a bound method if one exists which is a D-Bus
548
property with the specified name and interface.
549
"""
550
for name in (property_name,
551
property_name + u"_dbus_property"):
552
prop = getattr(self, name, None)
553
if (prop is None
554
or not self._is_dbus_property(prop)
555
or prop._dbus_name != property_name
556
or (interface_name and prop._dbus_interface
557
and interface_name != prop._dbus_interface)):
558
continue
559
return prop
560
# No such property
561
raise DBusPropertyNotFound(self.dbus_object_path + u":"
562
+ interface_name + u"."
563
+ property_name)
564
565
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ss",
566
out_signature=u"v")
567
def Get(self, interface_name, property_name):
568
"""Standard D-Bus property Get() method, see D-Bus standard.
569
"""
570
prop = self._get_dbus_property(interface_name, property_name)
571
if prop._dbus_access == u"write":
572
raise DBusPropertyAccessException(property_name)
573
value = prop()
574
if not hasattr(value, u"variant_level"):
575
return value
576
return type(value)(value, variant_level=value.variant_level+1)
577
578
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ssv")
579
def Set(self, interface_name, property_name, value):
580
"""Standard D-Bus property Set() method, see D-Bus standard.
581
"""
582
prop = self._get_dbus_property(interface_name, property_name)
583
if prop._dbus_access == u"read":
584
raise DBusPropertyAccessException(property_name)
585
if prop._dbus_get_args_options[u"byte_arrays"]:
586
value = dbus.ByteArray(''.join(unichr(byte)
587
for byte in value))
588
prop(value)
589
590
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"s",
591
out_signature=u"a{sv}")
592
def GetAll(self, interface_name):
593
"""Standard D-Bus property GetAll() method, see D-Bus
594
standard.
595
596
Note: Will not include properties with access="write".
597
"""
598
all = {}
599
for name, prop in self._get_all_dbus_properties():
600
if (interface_name
601
and interface_name != prop._dbus_interface):
602
# Interface non-empty but did not match
603
continue
604
# Ignore write-only properties
605
if prop._dbus_access == u"write":
606
continue
607
value = prop()
608
if not hasattr(value, u"variant_level"):
609
all[name] = value
610
continue
611
all[name] = type(value)(value, variant_level=
612
value.variant_level+1)
613
return dbus.Dictionary(all, signature=u"sv")
614
615
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
616
out_signature=u"s",
617
path_keyword='object_path',
618
connection_keyword='connection')
619
def Introspect(self, object_path, connection):
620
"""Standard D-Bus method, overloaded to insert property tags.
621
"""
622
xmlstring = dbus.service.Object.Introspect(self, object_path,
623
connection)
624
document = xml.dom.minidom.parseString(xmlstring)
625
del xmlstring
626
def make_tag(document, name, prop):
627
e = document.createElement(u"property")
628
e.setAttribute(u"name", name)
629
e.setAttribute(u"type", prop._dbus_signature)
630
e.setAttribute(u"access", prop._dbus_access)
631
return e
632
for if_tag in document.getElementsByTagName(u"interface"):
633
for tag in (make_tag(document, name, prop)
634
for name, prop
635
in self._get_all_dbus_properties()
636
if prop._dbus_interface
637
== if_tag.getAttribute(u"name")):
638
if_tag.appendChild(tag)
639
xmlstring = document.toxml(u"utf-8")
640
document.unlink()
641
return xmlstring
642
643
644
class ClientDBus(Client, DBusObjectWithProperties):
645
"""A Client class using D-Bus
646
647
Attributes:
648
dbus_object_path: dbus.ObjectPath
649
bus: dbus.SystemBus()
650
"""
651
# dbus.service.Object doesn't use super(), so we can't either.
652
653
def __init__(self, bus = None, *args, **kwargs):
654
self.bus = bus
655
Client.__init__(self, *args, **kwargs)
656
# Only now, when this client is initialized, can it show up on
657
# the D-Bus
658
self.dbus_object_path = (dbus.ObjectPath
659
(u"/clients/"
660
+ self.name.replace(u".", u"_")))
661
DBusObjectWithProperties.__init__(self, self.bus,
662
self.dbus_object_path)
663
664
@staticmethod
665
def _datetime_to_dbus(dt, variant_level=0):
666
"""Convert a UTC datetime.datetime() to a D-Bus type."""
667
return dbus.String(dt.isoformat(),
668
variant_level=variant_level)
669
670
def enable(self):
671
oldstate = getattr(self, u"enabled", False)
672
r = Client.enable(self)
673
if oldstate != self.enabled:
674
# Emit D-Bus signals
675
self.PropertyChanged(dbus.String(u"enabled"),
676
dbus.Boolean(True, variant_level=1))
677
self.PropertyChanged(
678
dbus.String(u"last_enabled"),
679
self._datetime_to_dbus(self.last_enabled,
680
variant_level=1))
681
return r
682
683
def disable(self, signal = True):
684
oldstate = getattr(self, u"enabled", False)
685
r = Client.disable(self)
686
if signal and oldstate != self.enabled:
687
# Emit D-Bus signal
688
self.PropertyChanged(dbus.String(u"enabled"),
689
dbus.Boolean(False, variant_level=1))
690
return r
691
692
def __del__(self, *args, **kwargs):
693
try:
694
self.remove_from_connection()
695
except LookupError:
696
pass
697
if hasattr(DBusObjectWithProperties, u"__del__"):
698
DBusObjectWithProperties.__del__(self, *args, **kwargs)
699
Client.__del__(self, *args, **kwargs)
700
701
def checker_callback(self, pid, condition, command,
702
*args, **kwargs):
703
self.checker_callback_tag = None
704
self.checker = None
705
# Emit D-Bus signal
706
self.PropertyChanged(dbus.String(u"checker_running"),
707
dbus.Boolean(False, variant_level=1))
708
if os.WIFEXITED(condition):
709
exitstatus = os.WEXITSTATUS(condition)
710
# Emit D-Bus signal
711
self.CheckerCompleted(dbus.Int16(exitstatus),
712
dbus.Int64(condition),
713
dbus.String(command))
714
else:
715
# Emit D-Bus signal
716
self.CheckerCompleted(dbus.Int16(-1),
717
dbus.Int64(condition),
718
dbus.String(command))
719
720
return Client.checker_callback(self, pid, condition, command,
721
*args, **kwargs)
722
723
def checked_ok(self, *args, **kwargs):
724
r = Client.checked_ok(self, *args, **kwargs)
725
# Emit D-Bus signal
726
self.PropertyChanged(
727
dbus.String(u"last_checked_ok"),
728
(self._datetime_to_dbus(self.last_checked_ok,
729
variant_level=1)))
730
return r
731
732
def start_checker(self, *args, **kwargs):
733
old_checker = self.checker
734
if self.checker is not None:
735
old_checker_pid = self.checker.pid
736
else:
737
old_checker_pid = None
738
r = Client.start_checker(self, *args, **kwargs)
739
# Only if new checker process was started
740
if (self.checker is not None
741
and old_checker_pid != self.checker.pid):
742
# Emit D-Bus signal
743
self.CheckerStarted(self.current_checker_command)
744
self.PropertyChanged(
745
dbus.String(u"checker_running"),
746
dbus.Boolean(True, variant_level=1))
747
return r
748
749
def stop_checker(self, *args, **kwargs):
750
old_checker = getattr(self, u"checker", None)
751
r = Client.stop_checker(self, *args, **kwargs)
752
if (old_checker is not None
753
and getattr(self, u"checker", None) is None):
754
self.PropertyChanged(dbus.String(u"checker_running"),
755
dbus.Boolean(False, variant_level=1))
756
return r
757
758
## D-Bus methods & signals
759
_interface = u"se.bsnet.fukt.Mandos.Client"
760
761
# CheckedOK - method
762
@dbus.service.method(_interface)
763
def CheckedOK(self):
764
return self.checked_ok()
765
766
# CheckerCompleted - signal
767
@dbus.service.signal(_interface, signature=u"nxs")
768
def CheckerCompleted(self, exitcode, waitstatus, command):
769
"D-Bus signal"
770
pass
771
772
# CheckerStarted - signal
773
@dbus.service.signal(_interface, signature=u"s")
774
def CheckerStarted(self, command):
775
"D-Bus signal"
776
pass
777
778
# PropertyChanged - signal
779
@dbus.service.signal(_interface, signature=u"sv")
780
def PropertyChanged(self, property, value):
781
"D-Bus signal"
782
pass
783
784
# ReceivedSecret - signal
785
@dbus.service.signal(_interface)
786
def ReceivedSecret(self):
787
"D-Bus signal"
788
pass
789
790
# Rejected - signal
791
@dbus.service.signal(_interface)
792
def Rejected(self):
793
"D-Bus signal"
794
pass
795
796
# Enable - method
797
@dbus.service.method(_interface)
798
def Enable(self):
799
"D-Bus method"
800
self.enable()
801
802
# StartChecker - method
803
@dbus.service.method(_interface)
804
def StartChecker(self):
805
"D-Bus method"
806
self.start_checker()
807
808
# Disable - method
809
@dbus.service.method(_interface)
810
def Disable(self):
811
"D-Bus method"
812
self.disable()
813
814
# StopChecker - method
815
@dbus.service.method(_interface)
816
def StopChecker(self):
817
self.stop_checker()
818
819
# name - property
820
@dbus_service_property(_interface, signature=u"s", access=u"read")
821
def name_dbus_property(self):
822
return dbus.String(self.name)
823
824
# fingerprint - property
825
@dbus_service_property(_interface, signature=u"s", access=u"read")
826
def fingerprint_dbus_property(self):
827
return dbus.String(self.fingerprint)
828
829
# host - property
830
@dbus_service_property(_interface, signature=u"s",
831
access=u"readwrite")
832
def host_dbus_property(self, value=None):
833
if value is None: # get
834
return dbus.String(self.host)
835
self.host = value
836
# Emit D-Bus signal
837
self.PropertyChanged(dbus.String(u"host"),
838
dbus.String(value, variant_level=1))
839
840
# created - property
841
@dbus_service_property(_interface, signature=u"s", access=u"read")
842
def created_dbus_property(self):
843
return dbus.String(self._datetime_to_dbus(self.created))
844
845
# last_enabled - property
846
@dbus_service_property(_interface, signature=u"s", access=u"read")
847
def last_enabled_dbus_property(self):
848
if self.last_enabled is None:
849
return dbus.String(u"")
850
return dbus.String(self._datetime_to_dbus(self.last_enabled))
851
852
# enabled - property
853
@dbus_service_property(_interface, signature=u"b",
854
access=u"readwrite")
855
def enabled_dbus_property(self, value=None):
856
if value is None: # get
857
return dbus.Boolean(self.enabled)
858
if value:
859
self.enable()
860
else:
861
self.disable()
862
863
# last_checked_ok - property
864
@dbus_service_property(_interface, signature=u"s",
865
access=u"readwrite")
866
def last_checked_ok_dbus_property(self, value=None):
867
if value is not None:
868
self.checked_ok()
869
return
870
if self.last_checked_ok is None:
871
return dbus.String(u"")
872
return dbus.String(self._datetime_to_dbus(self
873
.last_checked_ok))
874
875
# timeout - property
876
@dbus_service_property(_interface, signature=u"t",
877
access=u"readwrite")
878
def timeout_dbus_property(self, value=None):
879
if value is None: # get
880
return dbus.UInt64(self.timeout_milliseconds())
881
self.timeout = datetime.timedelta(0, 0, 0, value)
882
# Emit D-Bus signal
883
self.PropertyChanged(dbus.String(u"timeout"),
884
dbus.UInt64(value, variant_level=1))
885
if getattr(self, u"disable_initiator_tag", None) is None:
886
return
887
# Reschedule timeout
888
gobject.source_remove(self.disable_initiator_tag)
889
self.disable_initiator_tag = None
890
time_to_die = (self.
891
_timedelta_to_milliseconds((self
892
.last_checked_ok
893
+ self.timeout)
894
- datetime.datetime
895
.utcnow()))
896
if time_to_die <= 0:
897
# The timeout has passed
898
self.disable()
899
else:
900
self.disable_initiator_tag = (gobject.timeout_add
901
(time_to_die, self.disable))
902
903
# interval - property
904
@dbus_service_property(_interface, signature=u"t",
905
access=u"readwrite")
906
def interval_dbus_property(self, value=None):
907
if value is None: # get
908
return dbus.UInt64(self.interval_milliseconds())
909
self.interval = datetime.timedelta(0, 0, 0, value)
910
# Emit D-Bus signal
911
self.PropertyChanged(dbus.String(u"interval"),
912
dbus.UInt64(value, variant_level=1))
913
if getattr(self, u"checker_initiator_tag", None) is None:
914
return
915
# Reschedule checker run
916
gobject.source_remove(self.checker_initiator_tag)
917
self.checker_initiator_tag = (gobject.timeout_add
918
(value, self.start_checker))
919
self.start_checker() # Start one now, too
920
921
# checker - property
922
@dbus_service_property(_interface, signature=u"s",
923
access=u"readwrite")
924
def checker_dbus_property(self, value=None):
925
if value is None: # get
926
return dbus.String(self.checker_command)
927
self.checker_command = value
928
# Emit D-Bus signal
929
self.PropertyChanged(dbus.String(u"checker"),
930
dbus.String(self.checker_command,
931
variant_level=1))
932
933
# checker_running - property
934
@dbus_service_property(_interface, signature=u"b",
935
access=u"readwrite")
936
def checker_running_dbus_property(self, value=None):
937
if value is None: # get
938
return dbus.Boolean(self.checker is not None)
939
if value:
940
self.start_checker()
941
else:
942
self.stop_checker()
943
944
# object_path - property
945
@dbus_service_property(_interface, signature=u"o", access=u"read")
946
def object_path_dbus_property(self):
947
return self.dbus_object_path # is already a dbus.ObjectPath
948
949
# secret = property
950
@dbus_service_property(_interface, signature=u"ay",
951
access=u"write", byte_arrays=True)
952
def secret_dbus_property(self, value):
953
self.secret = str(value)
954
955
del _interface
956
957
958
class ClientHandler(socketserver.BaseRequestHandler, object):
959
"""A class to handle client connections.
960
961
Instantiated once for each connection to handle it.
962
Note: This will run in its own forked process."""
963
964
def handle(self):
965
logger.info(u"TCP connection from: %s",
966
unicode(self.client_address))
967
logger.debug(u"IPC Pipe FD: %d", self.server.pipe[1])
968
# Open IPC pipe to parent process
969
with closing(os.fdopen(self.server.pipe[1], u"w", 1)) as ipc:
970
session = (gnutls.connection
971
.ClientSession(self.request,
972
gnutls.connection
973
.X509Credentials()))
974
975
line = self.request.makefile().readline()
976
logger.debug(u"Protocol version: %r", line)
977
try:
978
if int(line.strip().split()[0]) > 1:
979
raise RuntimeError
980
except (ValueError, IndexError, RuntimeError), error:
981
logger.error(u"Unknown protocol version: %s", error)
982
return
983
984
# Note: gnutls.connection.X509Credentials is really a
985
# generic GnuTLS certificate credentials object so long as
986
# no X.509 keys are added to it. Therefore, we can use it
987
# here despite using OpenPGP certificates.
988
989
#priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
990
# u"+AES-256-CBC", u"+SHA1",
991
# u"+COMP-NULL", u"+CTYPE-OPENPGP",
992
# u"+DHE-DSS"))
993
# Use a fallback default, since this MUST be set.
994
priority = self.server.gnutls_priority
995
if priority is None:
996
priority = u"NORMAL"
997
(gnutls.library.functions
998
.gnutls_priority_set_direct(session._c_object,
999
priority, None))
1000
1001
try:
1002
session.handshake()
1003
except gnutls.errors.GNUTLSError, error:
1004
logger.warning(u"Handshake failed: %s", error)
1005
# Do not run session.bye() here: the session is not
1006
# established. Just abandon the request.
1007
return
1008
logger.debug(u"Handshake succeeded")
1009
try:
1010
fpr = self.fingerprint(self.peer_certificate(session))
1011
except (TypeError, gnutls.errors.GNUTLSError), error:
1012
logger.warning(u"Bad certificate: %s", error)
1013
session.bye()
1014
return
1015
logger.debug(u"Fingerprint: %s", fpr)
1016
1017
for c in self.server.clients:
1018
if c.fingerprint == fpr:
1019
client = c
1020
break
1021
else:
1022
ipc.write(u"NOTFOUND %s %s\n"
1023
% (fpr, unicode(self.client_address)))
1024
session.bye()
1025
return
1026
# Have to check if client.still_valid(), since it is
1027
# possible that the client timed out while establishing
1028
# the GnuTLS session.
1029
if not client.still_valid():
1030
ipc.write(u"INVALID %s\n" % client.name)
1031
session.bye()
1032
return
1033
ipc.write(u"SENDING %s\n" % client.name)
1034
sent_size = 0
1035
while sent_size < len(client.secret):
1036
sent = session.send(client.secret[sent_size:])
1037
logger.debug(u"Sent: %d, remaining: %d",
1038
sent, len(client.secret)
1039
- (sent_size + sent))
1040
sent_size += sent
1041
session.bye()
1042
1043
@staticmethod
1044
def peer_certificate(session):
1045
"Return the peer's OpenPGP certificate as a bytestring"
1046
# If not an OpenPGP certificate...
1047
if (gnutls.library.functions
1048
.gnutls_certificate_type_get(session._c_object)
1049
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1050
# ...do the normal thing
1051
return session.peer_certificate
1052
list_size = ctypes.c_uint(1)
1053
cert_list = (gnutls.library.functions
1054
.gnutls_certificate_get_peers
1055
(session._c_object, ctypes.byref(list_size)))
1056
if not bool(cert_list) and list_size.value != 0:
1057
raise gnutls.errors.GNUTLSError(u"error getting peer"
1058
u" certificate")
1059
if list_size.value == 0:
1060
return None
1061
cert = cert_list[0]
1062
return ctypes.string_at(cert.data, cert.size)
1063
1064
@staticmethod
1065
def fingerprint(openpgp):
1066
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1067
# New GnuTLS "datum" with the OpenPGP public key
1068
datum = (gnutls.library.types
1069
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1070
ctypes.POINTER
1071
(ctypes.c_ubyte)),
1072
ctypes.c_uint(len(openpgp))))
1073
# New empty GnuTLS certificate
1074
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1075
(gnutls.library.functions
1076
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1077
# Import the OpenPGP public key into the certificate
1078
(gnutls.library.functions
1079
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1080
gnutls.library.constants
1081
.GNUTLS_OPENPGP_FMT_RAW))
1082
# Verify the self signature in the key
1083
crtverify = ctypes.c_uint()
1084
(gnutls.library.functions
1085
.gnutls_openpgp_crt_verify_self(crt, 0,
1086
ctypes.byref(crtverify)))
1087
if crtverify.value != 0:
1088
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1089
raise (gnutls.errors.CertificateSecurityError
1090
(u"Verify failed"))
1091
# New buffer for the fingerprint
1092
buf = ctypes.create_string_buffer(20)
1093
buf_len = ctypes.c_size_t()
1094
# Get the fingerprint from the certificate into the buffer
1095
(gnutls.library.functions
1096
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1097
ctypes.byref(buf_len)))
1098
# Deinit the certificate
1099
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1100
# Convert the buffer to a Python bytestring
1101
fpr = ctypes.string_at(buf, buf_len.value)
1102
# Convert the bytestring to hexadecimal notation
1103
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
1104
return hex_fpr
1105
1106
1107
class ForkingMixInWithPipe(socketserver.ForkingMixIn, object):
1108
"""Like socketserver.ForkingMixIn, but also pass a pipe."""
1109
def process_request(self, request, client_address):
1110
"""Overrides and wraps the original process_request().
1111
1112
This function creates a new pipe in self.pipe
1113
"""
1114
self.pipe = os.pipe()
1115
super(ForkingMixInWithPipe,
1116
self).process_request(request, client_address)
1117
os.close(self.pipe[1]) # close write end
1118
self.add_pipe(self.pipe[0])
1119
def add_pipe(self, pipe):
1120
"""Dummy function; override as necessary"""
1121
os.close(pipe)
1122
1123
1124
class IPv6_TCPServer(ForkingMixInWithPipe,
1125
socketserver.TCPServer, object):
1126
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1127
1128
Attributes:
1129
enabled: Boolean; whether this server is activated yet
1130
interface: None or a network interface name (string)
1131
use_ipv6: Boolean; to use IPv6 or not
1132
"""
1133
def __init__(self, server_address, RequestHandlerClass,
1134
interface=None, use_ipv6=True):
1135
self.interface = interface
1136
if use_ipv6:
1137
self.address_family = socket.AF_INET6
1138
socketserver.TCPServer.__init__(self, server_address,
1139
RequestHandlerClass)
1140
def server_bind(self):
1141
"""This overrides the normal server_bind() function
1142
to bind to an interface if one was specified, and also NOT to
1143
bind to an address or port if they were not specified."""
1144
if self.interface is not None:
1145
if SO_BINDTODEVICE is None:
1146
logger.error(u"SO_BINDTODEVICE does not exist;"
1147
u" cannot bind to interface %s",
1148
self.interface)
1149
else:
21
self.dn = dn
22
if password:
23
self.password = password
24
elif passfile:
25
self.password = open(passfile).readall()
26
else:
27
print "No Password or Passfile in client config file"
28
# raise RuntimeError XXX
29
self.password = "gazonk"
30
self.fqdn = fqdn
31
self.created = datetime.datetime.now()
32
self.last_seen = None
33
if timeout is None:
34
timeout = options.timeout
35
self.timeout = timeout
36
if interval == -1:
37
interval = options.interval
38
self.interval = interval
39
self.next_check = datetime.datetime.now()
40
41
42
class server_metaclass(type):
43
"Common behavior for the UDP and TCP server classes"
44
def __new__(cls, name, bases, attrs):
45
attrs["address_family"] = socket.AF_INET6
46
attrs["allow_reuse_address"] = True
47
def server_bind(self):
48
if self.options.interface:
49
if not hasattr(socket, "SO_BINDTODEVICE"):
50
# From /usr/include/asm-i486/socket.h
51
socket.SO_BINDTODEVICE = 25
1150
52
try:
1151
53
self.socket.setsockopt(socket.SOL_SOCKET,
1152
SO_BINDTODEVICE,
1153
str(self.interface
1154
+ u'\0'))
54
socket.SO_BINDTODEVICE,
55
self.options.interface)
1155
56
except socket.error, error:
1156
57
if error[0] == errno.EPERM:
1157
logger.error(u"No permission to"
1158
u" bind to interface %s",
1159
self.interface)
1160
elif error[0] == errno.ENOPROTOOPT:
1161
logger.error(u"SO_BINDTODEVICE not available;"
1162
u" cannot bind to interface %s",
1163
self.interface)
58
print "Warning: No permission to bind to interface", \
59
self.options.interface
1164
60
else:
1165
raise
1166
# Only bind(2) the socket if we really need to.
1167
if self.server_address[0] or self.server_address[1]:
1168
if not self.server_address[0]:
1169
if self.address_family == socket.AF_INET6:
1170
any_address = u"::" # in6addr_any
1171
else:
1172
any_address = socket.INADDR_ANY
1173
self.server_address = (any_address,
1174
self.server_address[1])
1175
elif not self.server_address[1]:
1176
self.server_address = (self.server_address[0],
1177
0)
1178
# if self.interface:
1179
# self.server_address = (self.server_address[0],
1180
# 0, # port
1181
# 0, # flowinfo
1182
# if_nametoindex
1183
# (self.interface))
1184
return socketserver.TCPServer.server_bind(self)
1185
1186
1187
class MandosServer(IPv6_TCPServer):
1188
"""Mandos server.
1189
1190
Attributes:
1191
clients: set of Client objects
1192
gnutls_priority GnuTLS priority string
1193
use_dbus: Boolean; to emit D-Bus signals or not
1194
1195
Assumes a gobject.MainLoop event loop.
1196
"""
1197
def __init__(self, server_address, RequestHandlerClass,
1198
interface=None, use_ipv6=True, clients=None,
1199
gnutls_priority=None, use_dbus=True):
1200
self.enabled = False
1201
self.clients = clients
1202
if self.clients is None:
1203
self.clients = set()
1204
self.use_dbus = use_dbus
1205
self.gnutls_priority = gnutls_priority
1206
IPv6_TCPServer.__init__(self, server_address,
1207
RequestHandlerClass,
1208
interface = interface,
1209
use_ipv6 = use_ipv6)
1210
def server_activate(self):
1211
if self.enabled:
1212
return socketserver.TCPServer.server_activate(self)
1213
def enable(self):
1214
self.enabled = True
1215
def add_pipe(self, pipe):
1216
# Call "handle_ipc" for both data and EOF events
1217
gobject.io_add_watch(pipe, gobject.IO_IN | gobject.IO_HUP,
1218
self.handle_ipc)
1219
def handle_ipc(self, source, condition, file_objects={}):
1220
condition_names = {
1221
gobject.IO_IN: u"IN", # There is data to read.
1222
gobject.IO_OUT: u"OUT", # Data can be written (without
1223
# blocking).
1224
gobject.IO_PRI: u"PRI", # There is urgent data to read.
1225
gobject.IO_ERR: u"ERR", # Error condition.
1226
gobject.IO_HUP: u"HUP" # Hung up (the connection has been
1227
# broken, usually for pipes and
1228
# sockets).
1229
}
1230
conditions_string = ' | '.join(name
1231
for cond, name in
1232
condition_names.iteritems()
1233
if cond & condition)
1234
logger.debug(u"Handling IPC: FD = %d, condition = %s", source,
1235
conditions_string)
1236
1237
# Turn the pipe file descriptor into a Python file object
1238
if source not in file_objects:
1239
file_objects[source] = os.fdopen(source, u"r", 1)
1240
1241
# Read a line from the file object
1242
cmdline = file_objects[source].readline()
1243
if not cmdline: # Empty line means end of file
1244
# close the IPC pipe
1245
file_objects[source].close()
1246
del file_objects[source]
1247
1248
# Stop calling this function
1249
return False
1250
1251
logger.debug(u"IPC command: %r", cmdline)
1252
1253
# Parse and act on command
1254
cmd, args = cmdline.rstrip(u"\r\n").split(None, 1)
1255
1256
if cmd == u"NOTFOUND":
1257
logger.warning(u"Client not found for fingerprint: %s",
1258
args)
1259
if self.use_dbus:
1260
# Emit D-Bus signal
1261
mandos_dbus_service.ClientNotFound(args)
1262
elif cmd == u"INVALID":
1263
for client in self.clients:
1264
if client.name == args:
1265
logger.warning(u"Client %s is invalid", args)
1266
if self.use_dbus:
1267
# Emit D-Bus signal
1268
client.Rejected()
1269
break
1270
else:
1271
logger.error(u"Unknown client %s is invalid", args)
1272
elif cmd == u"SENDING":
1273
for client in self.clients:
1274
if client.name == args:
1275
logger.info(u"Sending secret to %s", client.name)
1276
client.checked_ok()
1277
if self.use_dbus:
1278
# Emit D-Bus signal
1279
client.ReceivedSecret()
1280
break
1281
else:
1282
logger.error(u"Sending secret to unknown client %s",
1283
args)
1284
else:
1285
logger.error(u"Unknown IPC command: %r", cmdline)
1286
1287
# Keep calling this function
1288
return True
1289
61
raise error
62
return super(type(self), self).server_bind()
63
attrs["server_bind"] = server_bind
64
def init(self, *args, **kwargs):
65
if "options" in kwargs:
66
self.options = kwargs["options"]
67
del kwargs["options"]
68
if "clients" in kwargs:
69
self.clients = kwargs["clients"]
70
del kwargs["clients"]
71
if "credentials" in kwargs:
72
self.credentials = kwargs["credentials"]
73
del kwargs["credentials"]
74
return super(type(self), self).__init__(*args, **kwargs)
75
attrs["__init__"] = init
76
return type.__new__(cls, name, bases, attrs)
77
78
79
class udp_handler(SocketServer.DatagramRequestHandler, object):
80
def handle(self):
81
self.wfile.write("Polo")
82
print "UDP request answered"
83
84
85
class IPv6_UDPServer(SocketServer.UDPServer, object):
86
__metaclass__ = server_metaclass
87
def verify_request(self, request, client_address):
88
print "UDP request came"
89
return request[0] == "Marco"
90
91
92
class tcp_handler(SocketServer.BaseRequestHandler, object):
93
def handle(self):
94
print "TCP request came"
95
print "Request:", self.request
96
print "Client Address:", self.client_address
97
print "Server:", self.server
98
session = gnutls.connection.ServerSession(self.request,
99
self.server.credentials)
100
session.handshake()
101
if session.peer_certificate:
102
print "DN:", session.peer_certificate.subject
103
try:
104
session.verify_peer()
105
except gnutls.errors.CertificateError, error:
106
print "Verify failed", error
107
session.bye()
108
return
109
try:
110
session.send(dict((client.dn, client.password)
111
for client in self.server.clients)
112
[session.peer_certificate.subject])
113
except KeyError:
114
session.send("gazonk")
115
# Log maybe? XXX
116
session.bye()
117
118
119
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
120
__metaclass__ = server_metaclass
121
request_queue_size = 1024
122
123
124
in6addr_any = "::"
125
126
cred = None
1290
127
1291
128
def string_to_delta(interval):
1292
129
"""Parse a string and return a datetime.timedelta
1293
1294
>>> string_to_delta(u'7d')
130
131
>>> string_to_delta('7d')
1295
132
datetime.timedelta(7)
1296
>>> string_to_delta(u'60s')
133
>>> string_to_delta('60s')
1297
134
datetime.timedelta(0, 60)
1298
>>> string_to_delta(u'60m')
135
>>> string_to_delta('60m')
1299
136
datetime.timedelta(0, 3600)
1300
>>> string_to_delta(u'24h')
137
>>> string_to_delta('24h')
1301
138
datetime.timedelta(1)
1302
139
>>> string_to_delta(u'1w')
1303
140
datetime.timedelta(7)
1304
>>> string_to_delta(u'5m 30s')
1305
datetime.timedelta(0, 330)
1306
141
"""
1307
timevalue = datetime.timedelta(0)
1308
for s in interval.split():
1309
try:
1310
suffix = unicode(s[-1])
1311
value = int(s[:-1])
1312
if suffix == u"d":
1313
delta = datetime.timedelta(value)
1314
elif suffix == u"s":
1315
delta = datetime.timedelta(0, value)
1316
elif suffix == u"m":
1317
delta = datetime.timedelta(0, 0, 0, 0, value)
1318
elif suffix == u"h":
1319
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
1320
elif suffix == u"w":
1321
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1322
else:
1323
raise ValueError
1324
except (ValueError, IndexError):
142
try:
143
suffix=unicode(interval[-1])
144
value=int(interval[:-1])
145
if suffix == u"d":
146
delta = datetime.timedelta(value)
147
elif suffix == u"s":
148
delta = datetime.timedelta(0, value)
149
elif suffix == u"m":
150
delta = datetime.timedelta(0, 0, 0, 0, value)
151
elif suffix == u"h":
152
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
153
elif suffix == u"w":
154
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
155
else:
1325
156
raise ValueError
1326
timevalue += delta
1327
return timevalue
1328
1329
1330
def if_nametoindex(interface):
1331
"""Call the C function if_nametoindex(), or equivalent
1332
1333
Note: This function cannot accept a unicode string."""
1334
global if_nametoindex
1335
try:
1336
if_nametoindex = (ctypes.cdll.LoadLibrary
1337
(ctypes.util.find_library(u"c"))
1338
.if_nametoindex)
1339
except (OSError, AttributeError):
1340
logger.warning(u"Doing if_nametoindex the hard way")
1341
def if_nametoindex(interface):
1342
"Get an interface index the hard way, i.e. using fcntl()"
1343
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1344
with closing(socket.socket()) as s:
1345
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1346
struct.pack(str(u"16s16x"),
1347
interface))
1348
interface_index = struct.unpack(str(u"I"),
1349
ifreq[16:20])[0]
1350
return interface_index
1351
return if_nametoindex(interface)
1352
1353
1354
def daemon(nochdir = False, noclose = False):
1355
"""See daemon(3). Standard BSD Unix function.
1356
1357
This should really exist as os.daemon, but it doesn't (yet)."""
1358
if os.fork():
1359
sys.exit()
1360
os.setsid()
1361
if not nochdir:
1362
os.chdir(u"/")
1363
if os.fork():
1364
sys.exit()
1365
if not noclose:
1366
# Close all standard open file descriptors
1367
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1368
if not stat.S_ISCHR(os.fstat(null).st_mode):
1369
raise OSError(errno.ENODEV,
1370
u"/dev/null not a character device")
1371
os.dup2(null, sys.stdin.fileno())
1372
os.dup2(null, sys.stdout.fileno())
1373
os.dup2(null, sys.stderr.fileno())
1374
if null > 2:
1375
os.close(null)
1376
157
except (ValueError, IndexError):
158
raise ValueError
159
return delta
1377
160
1378
161
def main():
1379
1380
##################################################################
1381
# Parsing of options, both command line and config file
1382
1383
parser = optparse.OptionParser(version = "%%prog %s" % version)
1384
parser.add_option("-i", u"--interface", type=u"string",
1385
metavar="IF", help=u"Bind to interface IF")
1386
parser.add_option("-a", u"--address", type=u"string",
1387
help=u"Address to listen for requests on")
1388
parser.add_option("-p", u"--port", type=u"int",
1389
help=u"Port number to receive requests on")
1390
parser.add_option("--check", action=u"store_true",
1391
help=u"Run self-test")
1392
parser.add_option("--debug", action=u"store_true",
1393
help=u"Debug mode; run in foreground and log to"
1394
u" terminal")
1395
parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1396
u" priority string (see GnuTLS documentation)")
1397
parser.add_option("--servicename", type=u"string",
1398
metavar=u"NAME", help=u"Zeroconf service name")
1399
parser.add_option("--configdir", type=u"string",
1400
default=u"/etc/mandos", metavar=u"DIR",
1401
help=u"Directory to search for configuration"
1402
u" files")
1403
parser.add_option("--no-dbus", action=u"store_false",
1404
dest=u"use_dbus", help=u"Do not provide D-Bus"
1405
u" system bus interface")
1406
parser.add_option("--no-ipv6", action=u"store_false",
1407
dest=u"use_ipv6", help=u"Do not use IPv6")
1408
options = parser.parse_args()[0]
1409
162
parser = OptionParser()
163
parser.add_option("-i", "--interface", type="string",
164
default="eth0", metavar="IF",
165
help="Interface to bind to")
166
parser.add_option("--cert", type="string", default="cert.pem",
167
metavar="FILE",
168
help="Public key certificate to use")
169
parser.add_option("--key", type="string", default="key.pem",
170
metavar="FILE",
171
help="Private key to use")
172
parser.add_option("--ca", type="string", default="ca.pem",
173
metavar="FILE",
174
help="Certificate Authority certificate to use")
175
parser.add_option("--crl", type="string", default="crl.pem",
176
metavar="FILE",
177
help="Certificate Revokation List to use")
178
parser.add_option("-p", "--port", type="int", default=49001,
179
help="Port number to receive requests on")
180
parser.add_option("--dh", type="int", metavar="BITS",
181
help="DH group to use")
182
parser.add_option("-t", "--timeout", type="string", # Parsed later
183
default="15m",
184
help="Amount of downtime allowed for clients")
185
parser.add_option("--interval", type="string", # Parsed later
186
default="5m",
187
help="How often to check that a client is up")
188
parser.add_option("--check", action="store_true", default=False,
189
help="Run self-test")
190
(options, args) = parser.parse_args()
191
1410
192
if options.check:
1411
193
import doctest
1412
194
doctest.testmod()
1413
195
sys.exit()
1414
196
1415
# Default values for config file for server-global settings
1416
server_defaults = { u"interface": u"",
1417
u"address": u"",
1418
u"port": u"",
1419
u"debug": u"False",
1420
u"priority":
1421
u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1422
u"servicename": u"Mandos",
1423
u"use_dbus": u"True",
1424
u"use_ipv6": u"True",
1425
}
1426
1427
# Parse config file for server-global settings
1428
server_config = configparser.SafeConfigParser(server_defaults)
1429
del server_defaults
1430
server_config.read(os.path.join(options.configdir,
1431
u"mandos.conf"))
1432
# Convert the SafeConfigParser object to a dict
1433
server_settings = server_config.defaults()
1434
# Use the appropriate methods on the non-string config options
1435
for option in (u"debug", u"use_dbus", u"use_ipv6"):
1436
server_settings[option] = server_config.getboolean(u"DEFAULT",
1437
option)
1438
if server_settings["port"]:
1439
server_settings["port"] = server_config.getint(u"DEFAULT",
1440
u"port")
1441
del server_config
1442
1443
# Override the settings from the config file with command line
1444
# options, if set.
1445
for option in (u"interface", u"address", u"port", u"debug",
1446
u"priority", u"servicename", u"configdir",
1447
u"use_dbus", u"use_ipv6"):
1448
value = getattr(options, option)
1449
if value is not None:
1450
server_settings[option] = value
1451
del options
1452
# Force all strings to be unicode
1453
for option in server_settings.keys():
1454
if type(server_settings[option]) is str:
1455
server_settings[option] = unicode(server_settings[option])
1456
# Now we have our good server settings in "server_settings"
1457
1458
##################################################################
1459
1460
# For convenience
1461
debug = server_settings[u"debug"]
1462
use_dbus = server_settings[u"use_dbus"]
1463
use_ipv6 = server_settings[u"use_ipv6"]
1464
1465
if not debug:
1466
syslogger.setLevel(logging.WARNING)
1467
console.setLevel(logging.WARNING)
1468
1469
if server_settings[u"servicename"] != u"Mandos":
1470
syslogger.setFormatter(logging.Formatter
1471
(u'Mandos (%s) [%%(process)d]:'
1472
u' %%(levelname)s: %%(message)s'
1473
% server_settings[u"servicename"]))
1474
1475
# Parse config file with clients
1476
client_defaults = { u"timeout": u"1h",
1477
u"interval": u"5m",
1478
u"checker": u"fping -q -- %%(host)s",
1479
u"host": u"",
1480
}
1481
client_config = configparser.SafeConfigParser(client_defaults)
1482
client_config.read(os.path.join(server_settings[u"configdir"],
1483
u"clients.conf"))
1484
1485
global mandos_dbus_service
1486
mandos_dbus_service = None
1487
1488
tcp_server = MandosServer((server_settings[u"address"],
1489
server_settings[u"port"]),
1490
ClientHandler,
1491
interface=server_settings[u"interface"],
1492
use_ipv6=use_ipv6,
1493
gnutls_priority=
1494
server_settings[u"priority"],
1495
use_dbus=use_dbus)
1496
pidfilename = u"/var/run/mandos.pid"
1497
try:
1498
pidfile = open(pidfilename, u"w")
1499
except IOError:
1500
logger.error(u"Could not open file %r", pidfilename)
1501
1502
try:
1503
uid = pwd.getpwnam(u"_mandos").pw_uid
1504
gid = pwd.getpwnam(u"_mandos").pw_gid
1505
except KeyError:
1506
try:
1507
uid = pwd.getpwnam(u"mandos").pw_uid
1508
gid = pwd.getpwnam(u"mandos").pw_gid
1509
except KeyError:
1510
try:
1511
uid = pwd.getpwnam(u"nobody").pw_uid
1512
gid = pwd.getpwnam(u"nobody").pw_gid
1513
except KeyError:
1514
uid = 65534
1515
gid = 65534
1516
try:
1517
os.setgid(gid)
1518
os.setuid(uid)
1519
except OSError, error:
1520
if error[0] != errno.EPERM:
1521
raise error
1522
1523
# Enable all possible GnuTLS debugging
1524
if debug:
1525
# "Use a log level over 10 to enable all debugging options."
1526
# - GnuTLS manual
1527
gnutls.library.functions.gnutls_global_set_log_level(11)
1528
1529
@gnutls.library.types.gnutls_log_func
1530
def debug_gnutls(level, string):
1531
logger.debug(u"GnuTLS: %s", string[:-1])
1532
1533
(gnutls.library.functions
1534
.gnutls_global_set_log_function(debug_gnutls))
1535
1536
global main_loop
1537
# From the Avahi example code
1538
DBusGMainLoop(set_as_default=True )
1539
main_loop = gobject.MainLoop()
1540
bus = dbus.SystemBus()
1541
# End of Avahi example code
1542
if use_dbus:
1543
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
1544
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1545
service = AvahiService(name = server_settings[u"servicename"],
1546
servicetype = u"_mandos._tcp",
1547
protocol = protocol, bus = bus)
1548
if server_settings["interface"]:
1549
service.interface = (if_nametoindex
1550
(str(server_settings[u"interface"])))
1551
1552
client_class = Client
1553
if use_dbus:
1554
client_class = functools.partial(ClientDBus, bus = bus)
1555
tcp_server.clients.update(set(
1556
client_class(name = section,
1557
config= dict(client_config.items(section)))
1558
for section in client_config.sections()))
1559
if not tcp_server.clients:
1560
logger.warning(u"No clients defined")
1561
1562
if debug:
1563
# Redirect stdin so all checkers get /dev/null
1564
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1565
os.dup2(null, sys.stdin.fileno())
1566
if null > 2:
1567
os.close(null)
1568
else:
1569
# No console logging
1570
logger.removeHandler(console)
1571
# Close all input and output, do double fork, etc.
1572
daemon()
1573
1574
try:
1575
with closing(pidfile):
1576
pid = os.getpid()
1577
pidfile.write(str(pid) + "\n")
1578
del pidfile
1579
except IOError:
1580
logger.error(u"Could not write to file %r with PID %d",
1581
pidfilename, pid)
1582
except NameError:
1583
# "pidfile" was never created
1584
pass
1585
del pidfilename
1586
1587
def cleanup():
1588
"Cleanup function; run on exit"
1589
service.cleanup()
1590
1591
while tcp_server.clients:
1592
client = tcp_server.clients.pop()
1593
client.disable_hook = None
1594
client.disable()
1595
1596
atexit.register(cleanup)
1597
1598
if not debug:
1599
signal.signal(signal.SIGINT, signal.SIG_IGN)
1600
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1601
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1602
1603
if use_dbus:
1604
class MandosDBusService(dbus.service.Object):
1605
"""A D-Bus proxy object"""
1606
def __init__(self):
1607
dbus.service.Object.__init__(self, bus, u"/")
1608
_interface = u"se.bsnet.fukt.Mandos"
1609
1610
@dbus.service.signal(_interface, signature=u"oa{sv}")
1611
def ClientAdded(self, objpath, properties):
1612
"D-Bus signal"
1613
pass
1614
1615
@dbus.service.signal(_interface, signature=u"s")
1616
def ClientNotFound(self, fingerprint):
1617
"D-Bus signal"
1618
pass
1619
1620
@dbus.service.signal(_interface, signature=u"os")
1621
def ClientRemoved(self, objpath, name):
1622
"D-Bus signal"
1623
pass
1624
1625
@dbus.service.method(_interface, out_signature=u"ao")
1626
def GetAllClients(self):
1627
"D-Bus method"
1628
return dbus.Array(c.dbus_object_path
1629
for c in tcp_server.clients)
1630
1631
@dbus.service.method(_interface,
1632
out_signature=u"a{oa{sv}}")
1633
def GetAllClientsWithProperties(self):
1634
"D-Bus method"
1635
return dbus.Dictionary(
1636
((c.dbus_object_path, c.GetAll(u""))
1637
for c in tcp_server.clients),
1638
signature=u"oa{sv}")
1639
1640
@dbus.service.method(_interface, in_signature=u"o")
1641
def RemoveClient(self, object_path):
1642
"D-Bus method"
1643
for c in tcp_server.clients:
1644
if c.dbus_object_path == object_path:
1645
tcp_server.clients.remove(c)
1646
c.remove_from_connection()
1647
# Don't signal anything except ClientRemoved
1648
c.disable(signal=False)
1649
# Emit D-Bus signal
1650
self.ClientRemoved(object_path, c.name)
1651
return
1652
raise KeyError
1653
1654
del _interface
1655
1656
mandos_dbus_service = MandosDBusService()
1657
1658
for client in tcp_server.clients:
1659
if use_dbus:
1660
# Emit D-Bus signal
1661
mandos_dbus_service.ClientAdded(client.dbus_object_path,
1662
client.GetAll(u""))
1663
client.enable()
1664
1665
tcp_server.enable()
1666
tcp_server.server_activate()
1667
1668
# Find out what port we got
1669
service.port = tcp_server.socket.getsockname()[1]
1670
if use_ipv6:
1671
logger.info(u"Now listening on address %r, port %d,"
1672
" flowinfo %d, scope_id %d"
1673
% tcp_server.socket.getsockname())
1674
else: # IPv4
1675
logger.info(u"Now listening on address %r, port %d"
1676
% tcp_server.socket.getsockname())
1677
1678
#service.interface = tcp_server.socket.getsockname()[3]
1679
1680
try:
1681
# From the Avahi example code
1682
try:
1683
service.activate()
1684
except dbus.exceptions.DBusException, error:
1685
logger.critical(u"DBusException: %s", error)
1686
sys.exit(1)
1687
# End of Avahi example code
1688
1689
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
1690
lambda *args, **kwargs:
1691
(tcp_server.handle_request
1692
(*args[2:], **kwargs) or True))
1693
1694
logger.debug(u"Starting main loop")
1695
main_loop.run()
1696
except AvahiError, error:
1697
logger.critical(u"AvahiError: %s", error)
1698
sys.exit(1)
1699
except KeyboardInterrupt:
1700
if debug:
1701
print >> sys.stderr
1702
logger.debug(u"Server received KeyboardInterrupt")
1703
logger.debug(u"Server exiting")
1704
1705
if __name__ == '__main__':
197
# Parse the time arguments
198
try:
199
options.timeout = string_to_delta(options.timeout)
200
except ValueError:
201
parser.error("option --timeout: Unparseable time")
202
203
try:
204
options.interval = string_to_delta(options.interval)
205
except ValueError:
206
parser.error("option --interval: Unparseable time")
207
208
cert = gnutls.crypto.X509Certificate(open(options.cert).read())
209
key = gnutls.crypto.X509PrivateKey(open(options.key).read())
210
ca = gnutls.crypto.X509Certificate(open(options.ca).read())
211
crl = gnutls.crypto.X509CRL(open(options.crl).read())
212
cred = gnutls.connection.X509Credentials(cert, key, [ca], [crl])
213
214
# Parse config file
215
defaults = {}
216
client_config_object = ConfigParser.SafeConfigParser(defaults)
217
client_config_object.read("mandos-clients.conf")
218
clients = [Client(name=section, options=options,
219
**(dict(client_config_object.items(section))))
220
for section in client_config_object.sections()]
221
222
udp_server = IPv6_UDPServer((in6addr_any, options.port),
223
udp_handler,
224
options=options)
225
226
tcp_server = IPv6_TCPServer((in6addr_any, options.port),
227
tcp_handler,
228
options=options,
229
clients=clients,
230
credentials=cred)
231
232
while True:
233
in_, out, err = select.select((udp_server,
234
tcp_server), (), ())
235
for server in in_:
236
server.handle_request()
237
238
239
if __name__ == "__main__":
1706
240
main()
241
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0