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- Committer: Björn Påhlsson
- Date: 2007-12-11 23:40:35 UTC
- Revision ID: belorn@braxen-20071211234035-m1nsu41vuzkak69h
Python based server
Added client configfile
Added client configfile
- 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" and "remove" in the "AvahiService" class, the
10
# "server_state_changed" and "entry_group_state_changed" functions,
11
# 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
2
36
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
12
import ConfigParser
48
import sys
49
import re
50
import os
51
import signal
52
from sets import Set
53
import subprocess
54
import atexit
55
import stat
56
import logging
57
import logging.handlers
58
import pwd
59
from contextlib import closing
60
61
import dbus
62
import dbus.service
63
import gobject
64
import avahi
65
from dbus.mainloop.glib import DBusGMainLoop
66
import ctypes
67
import ctypes.util
68
69
version = "1.0.8"
70
71
logger = logging.Logger('mandos')
72
syslogger = (logging.handlers.SysLogHandler
73
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
74
address = "/dev/log"))
75
syslogger.setFormatter(logging.Formatter
76
('Mandos [%(process)d]: %(levelname)s:'
77
' %(message)s'))
78
logger.addHandler(syslogger)
79
80
console = logging.StreamHandler()
81
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
82
' %(levelname)s: %(message)s'))
83
logger.addHandler(console)
84
85
class AvahiError(Exception):
86
def __init__(self, value, *args, **kwargs):
87
self.value = value
88
super(AvahiError, self).__init__(value, *args, **kwargs)
89
def __unicode__(self):
90
return unicode(repr(self.value))
91
92
class AvahiServiceError(AvahiError):
93
pass
94
95
class AvahiGroupError(AvahiError):
96
pass
97
98
99
class AvahiService(object):
100
"""An Avahi (Zeroconf) service.
101
Attributes:
102
interface: integer; avahi.IF_UNSPEC or an interface index.
103
Used to optionally bind to the specified interface.
104
name: string; Example: 'Mandos'
105
type: string; Example: '_mandos._tcp'.
106
See <http://www.dns-sd.org/ServiceTypes.html>
107
port: integer; what port to announce
108
TXT: list of strings; TXT record for the service
109
domain: string; Domain to publish on, default to .local if empty.
110
host: string; Host to publish records for, default is localhost
111
max_renames: integer; maximum number of renames
112
rename_count: integer; counter so we only rename after collisions
113
a sensible number of times
114
"""
115
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
116
servicetype = None, port = None, TXT = None,
117
domain = "", host = "", max_renames = 32768,
118
protocol = avahi.PROTO_UNSPEC):
119
self.interface = interface
120
self.name = name
121
self.type = servicetype
122
self.port = port
123
self.TXT = TXT if TXT is not None else []
124
self.domain = domain
125
self.host = host
126
self.rename_count = 0
127
self.max_renames = max_renames
128
self.protocol = protocol
129
def rename(self):
130
"""Derived from the Avahi example code"""
131
if self.rename_count >= self.max_renames:
132
logger.critical(u"No suitable Zeroconf service name found"
133
u" after %i retries, exiting.",
134
self.rename_count)
135
raise AvahiServiceError(u"Too many renames")
136
self.name = server.GetAlternativeServiceName(self.name)
137
logger.info(u"Changing Zeroconf service name to %r ...",
138
str(self.name))
139
syslogger.setFormatter(logging.Formatter
140
('Mandos (%s) [%%(process)d]:'
141
' %%(levelname)s: %%(message)s'
142
% self.name))
143
self.remove()
144
self.add()
145
self.rename_count += 1
146
def remove(self):
147
"""Derived from the Avahi example code"""
148
if group is not None:
149
group.Reset()
150
def add(self):
151
"""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)
160
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)
180
181
13
182
14
class Client(object):
183
"""A representation of a client host served by this server.
184
Attributes:
185
name: string; from the config file, used in log messages and
186
D-Bus identifiers
187
fingerprint: string (40 or 32 hexadecimal digits); used to
188
uniquely identify the client
189
secret: bytestring; sent verbatim (over TLS) to client
190
host: string; available for use by the checker command
191
created: datetime.datetime(); (UTC) object creation
192
last_enabled: datetime.datetime(); (UTC)
193
enabled: bool()
194
last_checked_ok: datetime.datetime(); (UTC) or None
195
timeout: datetime.timedelta(); How long from last_checked_ok
196
until this client is invalid
197
interval: datetime.timedelta(); How often to start a new checker
198
disable_hook: If set, called by disable() as disable_hook(self)
199
checker: subprocess.Popen(); a running checker process used
200
to see if the client lives.
201
'None' if no process is running.
202
checker_initiator_tag: a gobject event source tag, or None
203
disable_initiator_tag: - '' -
204
checker_callback_tag: - '' -
205
checker_command: string; External command which is run to check if
206
client lives. %() expansions are done at
207
runtime with vars(self) as dict, so that for
208
instance %(name)s can be used in the command.
209
current_checker_command: string; current running checker_command
210
"""
211
def timeout_milliseconds(self):
212
"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))
216
217
def interval_milliseconds(self):
218
"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))
222
223
def __init__(self, name = None, disable_hook=None, config=None):
224
"""Note: the 'checker' key in 'config' sets the
225
'checker_command' attribute and *not* the 'checker'
226
attribute."""
15
def __init__(self, name=None, dn=None, password=None,
16
passfile=None, fqdn=None, timeout=None,
17
interval=-1):
227
18
self.name = name
228
if config is None:
229
config = {}
230
logger.debug(u"Creating client %r", self.name)
231
# Uppercase and remove spaces from fingerprint for later
232
# comparison purposes with return value from the fingerprint()
233
# function
234
self.fingerprint = (config["fingerprint"].upper()
235
.replace(u" ", u""))
236
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:
243
self.secret = secfile.read()
19
self.dn = dn
20
if password:
21
self.password = password
22
elif passfile:
23
self.password = open(passfile).readall()
244
24
else:
245
raise TypeError(u"No secret or secfile for client %s"
246
% self.name)
247
self.host = config.get("host", "")
248
self.created = datetime.datetime.utcnow()
249
self.enabled = False
250
self.last_enabled = None
251
self.last_checked_ok = None
252
self.timeout = string_to_delta(config["timeout"])
253
self.interval = string_to_delta(config["interval"])
254
self.disable_hook = disable_hook
255
self.checker = None
256
self.checker_initiator_tag = None
257
self.disable_initiator_tag = None
258
self.checker_callback_tag = None
259
self.checker_command = config["checker"]
260
self.current_checker_command = None
261
self.last_connect = None
262
263
def enable(self):
264
"""Start this client's checker and timeout hooks"""
265
self.last_enabled = datetime.datetime.utcnow()
266
# Schedule a new checker to be started an 'interval' from now,
267
# and every interval from then on.
268
self.checker_initiator_tag = (gobject.timeout_add
269
(self.interval_milliseconds(),
270
self.start_checker))
271
# Also start a new checker *right now*.
272
self.start_checker()
273
# Schedule a disable() when 'timeout' has passed
274
self.disable_initiator_tag = (gobject.timeout_add
275
(self.timeout_milliseconds(),
276
self.disable))
277
self.enabled = True
278
279
def disable(self):
280
"""Disable this client."""
281
if not getattr(self, "enabled", False):
282
return False
283
logger.info(u"Disabling client %s", self.name)
284
if getattr(self, "disable_initiator_tag", False):
285
gobject.source_remove(self.disable_initiator_tag)
286
self.disable_initiator_tag = None
287
if getattr(self, "checker_initiator_tag", False):
288
gobject.source_remove(self.checker_initiator_tag)
289
self.checker_initiator_tag = None
290
self.stop_checker()
291
if self.disable_hook:
292
self.disable_hook(self)
293
self.enabled = False
294
# Do not run this again if called by a gobject.timeout_add
295
return False
296
297
def __del__(self):
298
self.disable_hook = None
299
self.disable()
300
301
def checker_callback(self, pid, condition, command):
302
"""The checker has completed, so take appropriate actions."""
303
self.checker_callback_tag = None
304
self.checker = None
305
if os.WIFEXITED(condition):
306
exitstatus = os.WEXITSTATUS(condition)
307
if exitstatus == 0:
308
logger.info(u"Checker for %(name)s succeeded",
309
vars(self))
310
self.checked_ok()
25
print "No Password or Passfile in client config file"
26
# raise RuntimeError XXX
27
self.password = "gazonk"
28
self.fqdn = fqdn
29
# self.created = ...
30
self.last_seen = None
31
if timeout is None:
32
timeout = self.server.options.timeout
33
self.timeout = timeout
34
if interval == -1:
35
interval = self.server.options.interval
36
self.interval = interval
37
38
def server_bind(self):
39
if self.options.interface:
40
if not hasattr(socket, "SO_BINDTODEVICE"):
41
# From /usr/include/asm-i486/socket.h
42
socket.SO_BINDTODEVICE = 25
43
try:
44
self.socket.setsockopt(socket.SOL_SOCKET,
45
socket.SO_BINDTODEVICE,
46
self.options.interface)
47
except socket.error, error:
48
if error[0] == errno.EPERM:
49
print "Warning: Denied permission to bind to interface", \
50
self.options.interface
311
51
else:
312
logger.info(u"Checker for %(name)s failed",
313
vars(self))
314
else:
315
logger.warning(u"Checker for %(name)s crashed?",
316
vars(self))
317
318
def checked_ok(self):
319
"""Bump up the timeout for this client.
320
This should only be called when the client has been seen,
321
alive and well.
322
"""
323
self.last_checked_ok = datetime.datetime.utcnow()
324
gobject.source_remove(self.disable_initiator_tag)
325
self.disable_initiator_tag = (gobject.timeout_add
326
(self.timeout_milliseconds(),
327
self.disable))
328
329
def start_checker(self):
330
"""Start a new checker subprocess if one is not running.
331
If a checker already exists, leave it running and do
332
nothing."""
333
# The reason for not killing a running checker is that if we
334
# did that, then if a checker (for some reason) started
335
# running slowly and taking more than 'interval' time, the
336
# client would inevitably timeout, since no checker would get
337
# a chance to run to completion. If we instead leave running
338
# 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.
341
342
# If a checker exists, make sure it is not a zombie
343
if self.checker is not None:
344
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
345
if pid:
346
logger.warning("Checker was a zombie")
347
gobject.source_remove(self.checker_callback_tag)
348
self.checker_callback(pid, status,
349
self.current_checker_command)
350
# Start a new checker if needed
351
if self.checker is None:
352
try:
353
# In case checker_command has exactly one % operator
354
command = self.checker_command % self.host
355
except TypeError:
356
# Escape attributes for the shell
357
escaped_attrs = dict((key, re.escape(str(val)))
358
for key, val in
359
vars(self).iteritems())
360
try:
361
command = self.checker_command % escaped_attrs
362
except TypeError, error:
363
logger.error(u'Could not format string "%s":'
364
u' %s', self.checker_command, error)
365
return True # Try again later
366
self.current_checker_command = command
367
try:
368
logger.info(u"Starting checker %r for %s",
369
command, self.name)
370
# We don't need to redirect stdout and stderr, since
371
# in normal mode, that is already done by daemon(),
372
# and in debug mode we don't want to. (Stdin is
373
# always replaced by /dev/null.)
374
self.checker = subprocess.Popen(command,
375
close_fds=True,
376
shell=True, cwd="/")
377
self.checker_callback_tag = (gobject.child_watch_add
378
(self.checker.pid,
379
self.checker_callback,
380
data=command))
381
# The checker may have completed before the gobject
382
# watch was added. Check for this.
383
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
384
if pid:
385
gobject.source_remove(self.checker_callback_tag)
386
self.checker_callback(pid, status, command)
387
except OSError, error:
388
logger.error(u"Failed to start subprocess: %s",
389
error)
390
# Re-run this periodically if run by gobject.timeout_add
391
return True
392
393
def stop_checker(self):
394
"""Force the checker process, if any, to stop."""
395
if self.checker_callback_tag:
396
gobject.source_remove(self.checker_callback_tag)
397
self.checker_callback_tag = None
398
if getattr(self, "checker", None) is None:
52
raise error
53
return super(type(self), self).server_bind()
54
55
56
def init_with_options(self, *args, **kwargs):
57
if "options" in kwargs:
58
self.options = kwargs["options"]
59
del kwargs["options"]
60
if "clients" in kwargs:
61
self.clients = kwargs["clients"]
62
del kwargs["clients"]
63
if "credentials" in kwargs:
64
self.credentials = kwargs["credentials"]
65
del kwargs["credentials"]
66
return super(type(self), self).__init__(*args, **kwargs)
67
68
69
class udp_handler(SocketServer.DatagramRequestHandler, object):
70
def handle(self):
71
self.wfile.write("Polo")
72
print "UDP request answered"
73
74
75
class IPv6_UDPServer(SocketServer.UDPServer, object):
76
__init__ = init_with_options
77
address_family = socket.AF_INET6
78
allow_reuse_address = True
79
server_bind = server_bind
80
def verify_request(self, request, client_address):
81
print "UDP request came"
82
return request[0] == "Marco"
83
84
85
class tcp_handler(SocketServer.BaseRequestHandler, object):
86
def handle(self):
87
print "TCP request came"
88
print "Request:", self.request
89
print "Client Address:", self.client_address
90
print "Server:", self.server
91
session = gnutls.connection.ServerSession(self.request,
92
self.server.credentials)
93
session.handshake()
94
if session.peer_certificate:
95
print "DN:", session.peer_certificate.subject
96
try:
97
session.verify_peer()
98
except gnutls.errors.CertificateError, error:
99
print "Verify failed", error
100
session.bye()
399
101
return
400
logger.debug(u"Stopping checker for %(name)s", vars(self))
401
try:
402
os.kill(self.checker.pid, signal.SIGTERM)
403
#os.sleep(0.5)
404
#if self.checker.poll() is None:
405
# os.kill(self.checker.pid, signal.SIGKILL)
406
except OSError, error:
407
if error.errno != errno.ESRCH: # No such process
408
raise
409
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):
423
"""A Client class using D-Bus
424
Attributes:
425
dbus_object_path: dbus.ObjectPath ; only set if self.use_dbus
426
"""
427
# dbus.service.Object doesn't use super(), so we can't either.
428
429
def __init__(self, *args, **kwargs):
430
Client.__init__(self, *args, **kwargs)
431
# Only now, when this client is initialized, can it show up on
432
# the D-Bus
433
self.dbus_object_path = (dbus.ObjectPath
434
("/clients/"
435
+ self.name.replace(".", "_")))
436
dbus.service.Object.__init__(self, bus,
437
self.dbus_object_path)
438
def enable(self):
439
oldstate = getattr(self, "enabled", False)
440
r = Client.enable(self)
441
if oldstate != self.enabled:
442
# Emit D-Bus signals
443
self.PropertyChanged(dbus.String(u"enabled"),
444
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)))
448
return r
449
450
def disable(self, signal = True):
451
oldstate = getattr(self, "enabled", False)
452
r = Client.disable(self)
453
if signal and oldstate != self.enabled:
454
# Emit D-Bus signal
455
self.PropertyChanged(dbus.String(u"enabled"),
456
dbus.Boolean(False, variant_level=1))
457
return r
458
459
def __del__(self, *args, **kwargs):
460
try:
461
self.remove_from_connection()
462
except LookupError:
463
pass
464
if hasattr(dbus.service.Object, "__del__"):
465
dbus.service.Object.__del__(self, *args, **kwargs)
466
Client.__del__(self, *args, **kwargs)
467
468
def checker_callback(self, pid, condition, command,
469
*args, **kwargs):
470
self.checker_callback_tag = None
471
self.checker = None
472
# Emit D-Bus signal
473
self.PropertyChanged(dbus.String(u"checker_running"),
474
dbus.Boolean(False, variant_level=1))
475
if os.WIFEXITED(condition):
476
exitstatus = os.WEXITSTATUS(condition)
477
# Emit D-Bus signal
478
self.CheckerCompleted(dbus.Int16(exitstatus),
479
dbus.Int64(condition),
480
dbus.String(command))
481
else:
482
# Emit D-Bus signal
483
self.CheckerCompleted(dbus.Int16(-1),
484
dbus.Int64(condition),
485
dbus.String(command))
486
487
return Client.checker_callback(self, pid, condition, command,
488
*args, **kwargs)
489
490
def checked_ok(self, *args, **kwargs):
491
r = Client.checked_ok(self, *args, **kwargs)
492
# Emit D-Bus signal
493
self.PropertyChanged(
494
dbus.String(u"last_checked_ok"),
495
(_datetime_to_dbus(self.last_checked_ok,
496
variant_level=1)))
497
return r
498
499
def start_checker(self, *args, **kwargs):
500
old_checker = self.checker
501
if self.checker is not None:
502
old_checker_pid = self.checker.pid
503
else:
504
old_checker_pid = None
505
r = Client.start_checker(self, *args, **kwargs)
506
# Only if new checker process was started
507
if (self.checker is not None
508
and old_checker_pid != self.checker.pid):
509
# Emit D-Bus signal
510
self.CheckerStarted(self.current_checker_command)
511
self.PropertyChanged(
512
dbus.String("checker_running"),
513
dbus.Boolean(True, variant_level=1))
514
return r
515
516
def stop_checker(self, *args, **kwargs):
517
old_checker = getattr(self, "checker", None)
518
r = Client.stop_checker(self, *args, **kwargs)
519
if (old_checker is not None
520
and getattr(self, "checker", None) is None):
521
self.PropertyChanged(dbus.String(u"checker_running"),
522
dbus.Boolean(False, variant_level=1))
523
return r
524
525
## D-Bus methods & signals
526
_interface = u"se.bsnet.fukt.Mandos.Client"
527
528
# CheckedOK - method
529
CheckedOK = dbus.service.method(_interface)(checked_ok)
530
CheckedOK.__name__ = "CheckedOK"
531
532
# CheckerCompleted - signal
533
@dbus.service.signal(_interface, signature="nxs")
534
def CheckerCompleted(self, exitcode, waitstatus, command):
535
"D-Bus signal"
536
pass
537
538
# CheckerStarted - signal
539
@dbus.service.signal(_interface, signature="s")
540
def CheckerStarted(self, command):
541
"D-Bus signal"
542
pass
543
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
# PropertyChanged - signal
592
@dbus.service.signal(_interface, signature="sv")
593
def PropertyChanged(self, property, value):
594
"D-Bus signal"
595
pass
596
597
# ReceivedSecret - signal
598
@dbus.service.signal(_interface)
599
def ReceivedSecret(self):
600
"D-Bus signal"
601
pass
602
603
# 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)))
652
653
# Enable - method
654
Enable = dbus.service.method(_interface)(enable)
655
Enable.__name__ = "Enable"
656
657
# StartChecker - method
658
@dbus.service.method(_interface)
659
def StartChecker(self):
660
"D-Bus method"
661
self.start_checker()
662
663
# Disable - method
664
@dbus.service.method(_interface)
665
def Disable(self):
666
"D-Bus method"
667
self.disable()
668
669
# StopChecker - method
670
StopChecker = dbus.service.method(_interface)(stop_checker)
671
StopChecker.__name__ = "StopChecker"
672
673
del _interface
674
675
676
class TCP_handler(SocketServer.BaseRequestHandler, object):
677
"""A TCP request handler class.
678
Instantiated by IPv6_TCPServer for each request to handle it.
679
Note: This will run in its own forked process."""
680
681
def handle(self):
682
logger.info(u"TCP connection from: %s",
683
unicode(self.client_address))
684
logger.debug(u"IPC Pipe FD: %d", self.server.pipe[1])
685
# Open IPC pipe to parent process
686
with closing(os.fdopen(self.server.pipe[1], "w", 1)) as ipc:
687
session = (gnutls.connection
688
.ClientSession(self.request,
689
gnutls.connection
690
.X509Credentials()))
691
692
line = self.request.makefile().readline()
693
logger.debug(u"Protocol version: %r", line)
694
try:
695
if int(line.strip().split()[0]) > 1:
696
raise RuntimeError
697
except (ValueError, IndexError, RuntimeError), error:
698
logger.error(u"Unknown protocol version: %s", error)
699
return
700
701
# Note: gnutls.connection.X509Credentials is really a
702
# generic GnuTLS certificate credentials object so long as
703
# no X.509 keys are added to it. Therefore, we can use it
704
# here despite using OpenPGP certificates.
705
706
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
707
# "+AES-256-CBC", "+SHA1",
708
# "+COMP-NULL", "+CTYPE-OPENPGP",
709
# "+DHE-DSS"))
710
# Use a fallback default, since this MUST be set.
711
priority = self.server.settings.get("priority", "NORMAL")
712
(gnutls.library.functions
713
.gnutls_priority_set_direct(session._c_object,
714
priority, None))
715
716
try:
717
session.handshake()
718
except gnutls.errors.GNUTLSError, error:
719
logger.warning(u"Handshake failed: %s", error)
720
# Do not run session.bye() here: the session is not
721
# established. Just abandon the request.
722
return
723
logger.debug(u"Handshake succeeded")
724
try:
725
fpr = self.fingerprint(self.peer_certificate(session))
726
except (TypeError, gnutls.errors.GNUTLSError), error:
727
logger.warning(u"Bad certificate: %s", error)
728
session.bye()
729
return
730
logger.debug(u"Fingerprint: %s", fpr)
731
732
for c in self.server.clients:
733
if c.fingerprint == fpr:
734
client = c
735
break
736
else:
737
ipc.write("NOTFOUND %s\n" % fpr)
738
session.bye()
739
return
740
# Have to check if client.still_valid(), since it is
741
# possible that the client timed out while establishing
742
# the GnuTLS session.
743
if not client.still_valid():
744
ipc.write("INVALID %s\n" % client.name)
745
session.bye()
746
return
747
ipc.write("SENDING %s\n" % client.name)
748
sent_size = 0
749
while sent_size < len(client.secret):
750
sent = session.send(client.secret[sent_size:])
751
logger.debug(u"Sent: %d, remaining: %d",
752
sent, len(client.secret)
753
- (sent_size + sent))
754
sent_size += sent
755
session.bye()
756
757
@staticmethod
758
def peer_certificate(session):
759
"Return the peer's OpenPGP certificate as a bytestring"
760
# If not an OpenPGP certificate...
761
if (gnutls.library.functions
762
.gnutls_certificate_type_get(session._c_object)
763
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
764
# ...do the normal thing
765
return session.peer_certificate
766
list_size = ctypes.c_uint(1)
767
cert_list = (gnutls.library.functions
768
.gnutls_certificate_get_peers
769
(session._c_object, ctypes.byref(list_size)))
770
if not bool(cert_list) and list_size.value != 0:
771
raise gnutls.errors.GNUTLSError("error getting peer"
772
" certificate")
773
if list_size.value == 0:
774
return None
775
cert = cert_list[0]
776
return ctypes.string_at(cert.data, cert.size)
777
778
@staticmethod
779
def fingerprint(openpgp):
780
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
781
# New GnuTLS "datum" with the OpenPGP public key
782
datum = (gnutls.library.types
783
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
784
ctypes.POINTER
785
(ctypes.c_ubyte)),
786
ctypes.c_uint(len(openpgp))))
787
# New empty GnuTLS certificate
788
crt = gnutls.library.types.gnutls_openpgp_crt_t()
789
(gnutls.library.functions
790
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
791
# Import the OpenPGP public key into the certificate
792
(gnutls.library.functions
793
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
794
gnutls.library.constants
795
.GNUTLS_OPENPGP_FMT_RAW))
796
# Verify the self signature in the key
797
crtverify = ctypes.c_uint()
798
(gnutls.library.functions
799
.gnutls_openpgp_crt_verify_self(crt, 0,
800
ctypes.byref(crtverify)))
801
if crtverify.value != 0:
802
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
803
raise (gnutls.errors.CertificateSecurityError
804
("Verify failed"))
805
# New buffer for the fingerprint
806
buf = ctypes.create_string_buffer(20)
807
buf_len = ctypes.c_size_t()
808
# Get the fingerprint from the certificate into the buffer
809
(gnutls.library.functions
810
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
811
ctypes.byref(buf_len)))
812
# Deinit the certificate
813
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
814
# Convert the buffer to a Python bytestring
815
fpr = ctypes.string_at(buf, buf_len.value)
816
# Convert the bytestring to hexadecimal notation
817
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
818
return hex_fpr
819
820
821
class ForkingMixInWithPipe(SocketServer.ForkingMixIn, object):
822
"""Like SocketServer.ForkingMixIn, but also pass a pipe.
823
Assumes a gobject.MainLoop event loop.
824
"""
825
def process_request(self, request, client_address):
826
"""This overrides and wraps the original process_request().
827
This function creates a new pipe in self.pipe
828
"""
829
self.pipe = os.pipe()
830
super(ForkingMixInWithPipe,
831
self).process_request(request, client_address)
832
os.close(self.pipe[1]) # close write end
833
# Call "handle_ipc" for both data and EOF events
834
gobject.io_add_watch(self.pipe[0],
835
gobject.IO_IN | gobject.IO_HUP,
836
self.handle_ipc)
837
def handle_ipc(source, condition):
838
"""Dummy function; override as necessary"""
839
os.close(source)
840
return False
841
842
843
class IPv6_TCPServer(ForkingMixInWithPipe,
844
SocketServer.TCPServer, object):
845
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
846
Attributes:
847
settings: Server settings
848
clients: Set() of Client objects
849
enabled: Boolean; whether this server is activated yet
850
"""
102
try:
103
session.send(dict((client.dn, client.password)
104
for client in self.server.clients)
105
[session.peer_certificate.subject])
106
except KeyError:
107
session.send("gazonk")
108
# Log maybe? XXX
109
session.bye()
110
111
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
112
__init__ = init_with_options
851
113
address_family = socket.AF_INET6
852
def __init__(self, *args, **kwargs):
853
if "settings" in kwargs:
854
self.settings = kwargs["settings"]
855
del kwargs["settings"]
856
if "clients" in kwargs:
857
self.clients = kwargs["clients"]
858
del kwargs["clients"]
859
if "use_ipv6" in kwargs:
860
if not kwargs["use_ipv6"]:
861
self.address_family = socket.AF_INET
862
del kwargs["use_ipv6"]
863
self.enabled = False
864
super(IPv6_TCPServer, self).__init__(*args, **kwargs)
865
def server_bind(self):
866
"""This overrides the normal server_bind() function
867
to bind to an interface if one was specified, and also NOT to
868
bind to an address or port if they were not specified."""
869
if self.settings["interface"]:
870
# 25 is from /usr/include/asm-i486/socket.h
871
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
872
try:
873
self.socket.setsockopt(socket.SOL_SOCKET,
874
SO_BINDTODEVICE,
875
self.settings["interface"])
876
except socket.error, error:
877
if error[0] == errno.EPERM:
878
logger.error(u"No permission to"
879
u" bind to interface %s",
880
self.settings["interface"])
881
else:
882
raise
883
# Only bind(2) the socket if we really need to.
884
if self.server_address[0] or self.server_address[1]:
885
if not self.server_address[0]:
886
if self.address_family == socket.AF_INET6:
887
any_address = "::" # in6addr_any
888
else:
889
any_address = socket.INADDR_ANY
890
self.server_address = (any_address,
891
self.server_address[1])
892
elif not self.server_address[1]:
893
self.server_address = (self.server_address[0],
894
0)
895
# if self.settings["interface"]:
896
# self.server_address = (self.server_address[0],
897
# 0, # port
898
# 0, # flowinfo
899
# if_nametoindex
900
# (self.settings
901
# ["interface"]))
902
return super(IPv6_TCPServer, self).server_bind()
903
def server_activate(self):
904
if self.enabled:
905
return super(IPv6_TCPServer, self).server_activate()
906
def enable(self):
907
self.enabled = True
908
def handle_ipc(self, source, condition, file_objects={}):
909
condition_names = {
910
gobject.IO_IN: "IN", # There is data to read.
911
gobject.IO_OUT: "OUT", # Data can be written (without
912
# blocking).
913
gobject.IO_PRI: "PRI", # There is urgent data to read.
914
gobject.IO_ERR: "ERR", # Error condition.
915
gobject.IO_HUP: "HUP" # Hung up (the connection has been
916
# broken, usually for pipes and
917
# sockets).
918
}
919
conditions_string = ' | '.join(name
920
for cond, name in
921
condition_names.iteritems()
922
if cond & condition)
923
logger.debug("Handling IPC: FD = %d, condition = %s", source,
924
conditions_string)
925
926
# Turn the pipe file descriptor into a Python file object
927
if source not in file_objects:
928
file_objects[source] = os.fdopen(source, "r", 1)
929
930
# Read a line from the file object
931
cmdline = file_objects[source].readline()
932
if not cmdline: # Empty line means end of file
933
# close the IPC pipe
934
file_objects[source].close()
935
del file_objects[source]
936
937
# Stop calling this function
938
return False
939
940
logger.debug("IPC command: %r", cmdline)
941
942
# Parse and act on command
943
cmd, args = cmdline.rstrip("\r\n").split(None, 1)
944
945
if cmd == "NOTFOUND":
946
logger.warning(u"Client not found for fingerprint: %s",
947
args)
948
if self.settings["use_dbus"]:
949
# Emit D-Bus signal
950
mandos_dbus_service.ClientNotFound(args)
951
elif cmd == "INVALID":
952
for client in self.clients:
953
if client.name == args:
954
logger.warning(u"Client %s is invalid", args)
955
if self.settings["use_dbus"]:
956
# Emit D-Bus signal
957
client.Rejected()
958
break
959
else:
960
logger.error(u"Unknown client %s is invalid", args)
961
elif cmd == "SENDING":
962
for client in self.clients:
963
if client.name == args:
964
logger.info(u"Sending secret to %s", client.name)
965
client.checked_ok()
966
if self.settings["use_dbus"]:
967
# Emit D-Bus signal
968
client.ReceivedSecret()
969
break
970
else:
971
logger.error(u"Sending secret to unknown client %s",
972
args)
973
else:
974
logger.error("Unknown IPC command: %r", cmdline)
975
976
# Keep calling this function
977
return True
978
979
980
def string_to_delta(interval):
981
"""Parse a string and return a datetime.timedelta
982
983
>>> string_to_delta('7d')
984
datetime.timedelta(7)
985
>>> string_to_delta('60s')
986
datetime.timedelta(0, 60)
987
>>> string_to_delta('60m')
988
datetime.timedelta(0, 3600)
989
>>> string_to_delta('24h')
990
datetime.timedelta(1)
991
>>> string_to_delta(u'1w')
992
datetime.timedelta(7)
993
>>> string_to_delta('5m 30s')
994
datetime.timedelta(0, 330)
995
"""
996
timevalue = datetime.timedelta(0)
997
for s in interval.split():
998
try:
999
suffix = unicode(s[-1])
1000
value = int(s[:-1])
1001
if suffix == u"d":
1002
delta = datetime.timedelta(value)
1003
elif suffix == u"s":
1004
delta = datetime.timedelta(0, value)
1005
elif suffix == u"m":
1006
delta = datetime.timedelta(0, 0, 0, 0, value)
1007
elif suffix == u"h":
1008
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
1009
elif suffix == u"w":
1010
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1011
else:
1012
raise ValueError
1013
except (ValueError, IndexError):
1014
raise ValueError
1015
timevalue += delta
1016
return timevalue
1017
1018
1019
def server_state_changed(state):
1020
"""Derived from the Avahi example code"""
1021
if state == avahi.SERVER_COLLISION:
1022
logger.error(u"Zeroconf server name collision")
1023
service.remove()
1024
elif state == avahi.SERVER_RUNNING:
1025
service.add()
1026
1027
1028
def entry_group_state_changed(state, error):
1029
"""Derived from the Avahi example code"""
1030
logger.debug(u"Avahi state change: %i", state)
1031
1032
if state == avahi.ENTRY_GROUP_ESTABLISHED:
1033
logger.debug(u"Zeroconf service established.")
1034
elif state == avahi.ENTRY_GROUP_COLLISION:
1035
logger.warning(u"Zeroconf service name collision.")
1036
service.rename()
1037
elif state == avahi.ENTRY_GROUP_FAILURE:
1038
logger.critical(u"Avahi: Error in group state changed %s",
1039
unicode(error))
1040
raise AvahiGroupError(u"State changed: %s" % unicode(error))
1041
1042
def if_nametoindex(interface):
1043
"""Call the C function if_nametoindex(), or equivalent"""
1044
global if_nametoindex
1045
try:
1046
if_nametoindex = (ctypes.cdll.LoadLibrary
1047
(ctypes.util.find_library("c"))
1048
.if_nametoindex)
1049
except (OSError, AttributeError):
1050
if "struct" not in sys.modules:
1051
import struct
1052
if "fcntl" not in sys.modules:
1053
import fcntl
1054
def if_nametoindex(interface):
1055
"Get an interface index the hard way, i.e. using fcntl()"
1056
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1057
with closing(socket.socket()) as s:
1058
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1059
struct.pack("16s16x", interface))
1060
interface_index = struct.unpack("I", ifreq[16:20])[0]
1061
return interface_index
1062
return if_nametoindex(interface)
1063
1064
1065
def daemon(nochdir = False, noclose = False):
1066
"""See daemon(3). Standard BSD Unix function.
1067
This should really exist as os.daemon, but it doesn't (yet)."""
1068
if os.fork():
1069
sys.exit()
1070
os.setsid()
1071
if not nochdir:
1072
os.chdir("/")
1073
if os.fork():
1074
sys.exit()
1075
if not noclose:
1076
# Close all standard open file descriptors
1077
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1078
if not stat.S_ISCHR(os.fstat(null).st_mode):
1079
raise OSError(errno.ENODEV,
1080
"/dev/null not a character device")
1081
os.dup2(null, sys.stdin.fileno())
1082
os.dup2(null, sys.stdout.fileno())
1083
os.dup2(null, sys.stderr.fileno())
1084
if null > 2:
1085
os.close(null)
1086
114
allow_reuse_address = True
115
request_queue_size = 1024
116
server_bind = server_bind
117
118
119
in6addr_any = "::"
120
121
cred = None
1087
122
1088
123
def main():
1089
1090
######################################################################
1091
# Parsing of options, both command line and config file
1092
1093
parser = optparse.OptionParser(version = "%%prog %s" % version)
124
parser = OptionParser()
1094
125
parser.add_option("-i", "--interface", type="string",
1095
metavar="IF", help="Bind to interface IF")
1096
parser.add_option("-a", "--address", type="string",
1097
help="Address to listen for requests on")
1098
parser.add_option("-p", "--port", type="int",
126
default="eth0", metavar="IF",
127
help="Interface to bind to")
128
parser.add_option("--cert", type="string", default="cert.pem",
129
metavar="FILE",
130
help="Public key certificate to use")
131
parser.add_option("--key", type="string", default="key.pem",
132
metavar="FILE",
133
help="Private key to use")
134
parser.add_option("--ca", type="string", default="ca.pem",
135
metavar="FILE",
136
help="Certificate Authority certificate to use")
137
parser.add_option("--crl", type="string", default="crl.pem",
138
metavar="FILE",
139
help="Certificate Revokation List to use")
140
parser.add_option("-p", "--port", type="int", default=49001,
1099
141
help="Port number to receive requests on")
1100
parser.add_option("--check", action="store_true",
1101
help="Run self-test")
1102
parser.add_option("--debug", action="store_true",
1103
help="Debug mode; run in foreground and log to"
1104
" terminal")
1105
parser.add_option("--priority", type="string", help="GnuTLS"
1106
" priority string (see GnuTLS documentation)")
1107
parser.add_option("--servicename", type="string", metavar="NAME",
1108
help="Zeroconf service name")
1109
parser.add_option("--configdir", type="string",
1110
default="/etc/mandos", metavar="DIR",
1111
help="Directory to search for configuration"
1112
" files")
1113
parser.add_option("--no-dbus", action="store_false",
1114
dest="use_dbus",
1115
help="Do not provide D-Bus system bus"
1116
" interface")
1117
parser.add_option("--no-ipv6", action="store_false",
1118
dest="use_ipv6", help="Do not use IPv6")
1119
options = parser.parse_args()[0]
1120
1121
if options.check:
1122
import doctest
1123
doctest.testmod()
1124
sys.exit()
1125
1126
# Default values for config file for server-global settings
1127
server_defaults = { "interface": "",
1128
"address": "",
1129
"port": "",
1130
"debug": "False",
1131
"priority":
1132
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1133
"servicename": "Mandos",
1134
"use_dbus": "True",
1135
"use_ipv6": "True",
1136
}
1137
1138
# Parse config file for server-global settings
1139
server_config = ConfigParser.SafeConfigParser(server_defaults)
1140
del server_defaults
1141
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1142
# Convert the SafeConfigParser object to a dict
1143
server_settings = server_config.defaults()
1144
# Use the appropriate methods on the non-string config options
1145
server_settings["debug"] = server_config.getboolean("DEFAULT",
1146
"debug")
1147
server_settings["use_dbus"] = server_config.getboolean("DEFAULT",
1148
"use_dbus")
1149
server_settings["use_ipv6"] = server_config.getboolean("DEFAULT",
1150
"use_ipv6")
1151
if server_settings["port"]:
1152
server_settings["port"] = server_config.getint("DEFAULT",
1153
"port")
1154
del server_config
1155
1156
# Override the settings from the config file with command line
1157
# options, if set.
1158
for option in ("interface", "address", "port", "debug",
1159
"priority", "servicename", "configdir",
1160
"use_dbus", "use_ipv6"):
1161
value = getattr(options, option)
1162
if value is not None:
1163
server_settings[option] = value
1164
del options
1165
# Now we have our good server settings in "server_settings"
1166
1167
##################################################################
1168
1169
# For convenience
1170
debug = server_settings["debug"]
1171
use_dbus = server_settings["use_dbus"]
1172
use_ipv6 = server_settings["use_ipv6"]
1173
1174
if not debug:
1175
syslogger.setLevel(logging.WARNING)
1176
console.setLevel(logging.WARNING)
1177
1178
if server_settings["servicename"] != "Mandos":
1179
syslogger.setFormatter(logging.Formatter
1180
('Mandos (%s) [%%(process)d]:'
1181
' %%(levelname)s: %%(message)s'
1182
% server_settings["servicename"]))
1183
1184
# Parse config file with clients
1185
client_defaults = { "timeout": "1h",
1186
"interval": "5m",
1187
"checker": "fping -q -- %%(host)s",
1188
"host": "",
1189
}
1190
client_config = ConfigParser.SafeConfigParser(client_defaults)
1191
client_config.read(os.path.join(server_settings["configdir"],
1192
"clients.conf"))
1193
1194
global mandos_dbus_service
1195
mandos_dbus_service = None
1196
1197
clients = Set()
1198
tcp_server = IPv6_TCPServer((server_settings["address"],
1199
server_settings["port"]),
1200
TCP_handler,
1201
settings=server_settings,
1202
clients=clients, use_ipv6=use_ipv6)
1203
pidfilename = "/var/run/mandos.pid"
1204
try:
1205
pidfile = open(pidfilename, "w")
1206
except IOError:
1207
logger.error("Could not open file %r", pidfilename)
1208
1209
try:
1210
uid = pwd.getpwnam("_mandos").pw_uid
1211
gid = pwd.getpwnam("_mandos").pw_gid
1212
except KeyError:
1213
try:
1214
uid = pwd.getpwnam("mandos").pw_uid
1215
gid = pwd.getpwnam("mandos").pw_gid
1216
except KeyError:
1217
try:
1218
uid = pwd.getpwnam("nobody").pw_uid
1219
gid = pwd.getpwnam("nogroup").pw_gid
1220
except KeyError:
1221
uid = 65534
1222
gid = 65534
1223
try:
1224
os.setgid(gid)
1225
os.setuid(uid)
1226
except OSError, error:
1227
if error[0] != errno.EPERM:
1228
raise error
1229
1230
# Enable all possible GnuTLS debugging
1231
if debug:
1232
# "Use a log level over 10 to enable all debugging options."
1233
# - GnuTLS manual
1234
gnutls.library.functions.gnutls_global_set_log_level(11)
1235
1236
@gnutls.library.types.gnutls_log_func
1237
def debug_gnutls(level, string):
1238
logger.debug("GnuTLS: %s", string[:-1])
1239
1240
(gnutls.library.functions
1241
.gnutls_global_set_log_function(debug_gnutls))
1242
1243
global service
1244
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1245
service = AvahiService(name = server_settings["servicename"],
1246
servicetype = "_mandos._tcp",
1247
protocol = protocol)
1248
if server_settings["interface"]:
1249
service.interface = (if_nametoindex
1250
(server_settings["interface"]))
1251
1252
global main_loop
1253
global bus
1254
global server
1255
# From the Avahi example code
1256
DBusGMainLoop(set_as_default=True )
1257
main_loop = gobject.MainLoop()
1258
bus = dbus.SystemBus()
1259
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
1260
avahi.DBUS_PATH_SERVER),
1261
avahi.DBUS_INTERFACE_SERVER)
1262
# End of Avahi example code
1263
if use_dbus:
1264
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
1265
1266
client_class = Client
1267
if use_dbus:
1268
client_class = ClientDBus
1269
clients.update(Set(
1270
client_class(name = section,
1271
config= dict(client_config.items(section)))
1272
for section in client_config.sections()))
1273
if not clients:
1274
logger.warning(u"No clients defined")
1275
1276
if debug:
1277
# Redirect stdin so all checkers get /dev/null
1278
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1279
os.dup2(null, sys.stdin.fileno())
1280
if null > 2:
1281
os.close(null)
1282
else:
1283
# No console logging
1284
logger.removeHandler(console)
1285
# Close all input and output, do double fork, etc.
1286
daemon()
1287
1288
try:
1289
with closing(pidfile):
1290
pid = os.getpid()
1291
pidfile.write(str(pid) + "\n")
1292
del pidfile
1293
except IOError:
1294
logger.error(u"Could not write to file %r with PID %d",
1295
pidfilename, pid)
1296
except NameError:
1297
# "pidfile" was never created
1298
pass
1299
del pidfilename
1300
1301
def cleanup():
1302
"Cleanup function; run on exit"
1303
global group
1304
# From the Avahi example code
1305
if not group is None:
1306
group.Free()
1307
group = None
1308
# End of Avahi example code
1309
1310
while clients:
1311
client = clients.pop()
1312
client.disable_hook = None
1313
client.disable()
1314
1315
atexit.register(cleanup)
1316
1317
if not debug:
1318
signal.signal(signal.SIGINT, signal.SIG_IGN)
1319
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1320
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1321
1322
if use_dbus:
1323
class MandosDBusService(dbus.service.Object):
1324
"""A D-Bus proxy object"""
1325
def __init__(self):
1326
dbus.service.Object.__init__(self, bus, "/")
1327
_interface = u"se.bsnet.fukt.Mandos"
1328
1329
@dbus.service.signal(_interface, signature="oa{sv}")
1330
def ClientAdded(self, objpath, properties):
1331
"D-Bus signal"
1332
pass
1333
1334
@dbus.service.signal(_interface, signature="s")
1335
def ClientNotFound(self, fingerprint):
1336
"D-Bus signal"
1337
pass
1338
1339
@dbus.service.signal(_interface, signature="os")
1340
def ClientRemoved(self, objpath, name):
1341
"D-Bus signal"
1342
pass
1343
1344
@dbus.service.method(_interface, out_signature="ao")
1345
def GetAllClients(self):
1346
"D-Bus method"
1347
return dbus.Array(c.dbus_object_path for c in clients)
1348
1349
@dbus.service.method(_interface, out_signature="a{oa{sv}}")
1350
def GetAllClientsWithProperties(self):
1351
"D-Bus method"
1352
return dbus.Dictionary(
1353
((c.dbus_object_path, c.GetAllProperties())
1354
for c in clients),
1355
signature="oa{sv}")
1356
1357
@dbus.service.method(_interface, in_signature="o")
1358
def RemoveClient(self, object_path):
1359
"D-Bus method"
1360
for c in clients:
1361
if c.dbus_object_path == object_path:
1362
clients.remove(c)
1363
c.remove_from_connection()
1364
# Don't signal anything except ClientRemoved
1365
c.disable(signal=False)
1366
# Emit D-Bus signal
1367
self.ClientRemoved(object_path, c.name)
1368
return
1369
raise KeyError
1370
1371
del _interface
1372
1373
mandos_dbus_service = MandosDBusService()
1374
1375
for client in clients:
1376
if use_dbus:
1377
# Emit D-Bus signal
1378
mandos_dbus_service.ClientAdded(client.dbus_object_path,
1379
client.GetAllProperties())
1380
client.enable()
1381
1382
tcp_server.enable()
1383
tcp_server.server_activate()
1384
1385
# Find out what port we got
1386
service.port = tcp_server.socket.getsockname()[1]
1387
if use_ipv6:
1388
logger.info(u"Now listening on address %r, port %d,"
1389
" flowinfo %d, scope_id %d"
1390
% tcp_server.socket.getsockname())
1391
else: # IPv4
1392
logger.info(u"Now listening on address %r, port %d"
1393
% tcp_server.socket.getsockname())
1394
1395
#service.interface = tcp_server.socket.getsockname()[3]
1396
1397
try:
1398
# From the Avahi example code
1399
server.connect_to_signal("StateChanged", server_state_changed)
1400
try:
1401
server_state_changed(server.GetState())
1402
except dbus.exceptions.DBusException, error:
1403
logger.critical(u"DBusException: %s", error)
1404
sys.exit(1)
1405
# End of Avahi example code
1406
1407
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
1408
lambda *args, **kwargs:
1409
(tcp_server.handle_request
1410
(*args[2:], **kwargs) or True))
1411
1412
logger.debug(u"Starting main loop")
1413
main_loop.run()
1414
except AvahiError, error:
1415
logger.critical(u"AvahiError: %s", error)
1416
sys.exit(1)
1417
except KeyboardInterrupt:
1418
if debug:
1419
print >> sys.stderr
1420
logger.debug("Server received KeyboardInterrupt")
1421
logger.debug("Server exiting")
1422
1423
if __name__ == '__main__':
142
parser.add_option("--dh", type="int", metavar="BITS",
143
help="DH group to use")
144
parser.add_option("-t", "--timeout", type="string", # Parsed later
145
default="15m",
146
help="Amount of downtime allowed for clients")
147
(options, args) = parser.parse_args()
148
149
# Parse the time argument
150
try:
151
suffix=options.timeout[-1]
152
value=int(options.timeout[:-1])
153
if suffix == "d":
154
options.timeout = datetime.timedelta(value)
155
elif suffix == "s":
156
options.timeout = datetime.timedelta(0, value)
157
elif suffix == "m":
158
options.timeout = datetime.timedelta(0, 0, 0, 0, value)
159
elif suffix == "h":
160
options.timeout = datetime.timedelta(0, 0, 0, 0, 0, value)
161
elif suffix == "w":
162
options.timeout = datetime.timedelta(0, 0, 0, 0, 0, 0,
163
value)
164
else:
165
raise ValueError
166
except (ValueError, IndexError):
167
parser.error("option --timeout: Unparseable time")
168
169
cert = gnutls.crypto.X509Certificate(open(options.cert).read())
170
key = gnutls.crypto.X509PrivateKey(open(options.key).read())
171
ca = gnutls.crypto.X509Certificate(open(options.ca).read())
172
crl = gnutls.crypto.X509CRL(open(options.crl).read())
173
cred = gnutls.connection.X509Credentials(cert, key, [ca], [crl])
174
175
# Parse config file
176
defaults = {}
177
client_config_object = ConfigParser.SafeConfigParser(defaults)
178
client_config_object.read("mandos-clients.conf")
179
clients = [Client(name=section,
180
**(dict(client_config_object.items(section))))
181
for section in client_config_object.sections()]
182
183
udp_server = IPv6_UDPServer((in6addr_any, options.port),
184
udp_handler,
185
options=options)
186
187
tcp_server = IPv6_TCPServer((in6addr_any, options.port),
188
tcp_handler,
189
options=options,
190
clients=clients,
191
credentials=cred)
192
193
while True:
194
in_, out, err = select.select((udp_server,
195
tcp_server), (), ())
196
for server in in_:
197
server.handle_request()
198
199
200
if __name__ == "__main__":
1424
201
main()
202
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0