To get this branch, use:
bzr branch
http://bzr.recompile.se/loggerhead/mandos/release
« back to all changes in this revision
Viewing changes to server.py
- browse files at revision 6
- compare with another revision
- download diff
- download tarball
- view history from revision 6
- Committer: Teddy Hogeborn
- Date: 2008-01-18 21:23:46 UTC
- mfrom: (2.1.1 Project)
- Revision ID: teddy@fukt.bsnet.se-20080118212346-qo103d6o8r7xs4za
Merged from Björn.
- files added:
- 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
13
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
14
181
15
182
16
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."""
17
def __init__(self, name=None, options=None, dn=None,
18
password=None, passfile=None, fqdn=None,
19
timeout=None, interval=-1):
227
20
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()
244
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()
311
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())
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
360
52
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:
53
self.socket.setsockopt(socket.SOL_SOCKET,
54
socket.SO_BINDTODEVICE,
55
self.options.interface)
56
except socket.error, error:
57
if error[0] == errno.EPERM:
58
print "Warning: No permission to bind to interface", \
59
self.options.interface
60
else:
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()
399
108
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 org.freedesktop.DBus.Python.LookupError:
463
pass
464
dbus.service.Object.__del__(self, *args, **kwargs)
465
Client.__del__(self, *args, **kwargs)
466
467
def checker_callback(self, pid, condition, command,
468
*args, **kwargs):
469
self.checker_callback_tag = None
470
self.checker = None
471
# Emit D-Bus signal
472
self.PropertyChanged(dbus.String(u"checker_running"),
473
dbus.Boolean(False, variant_level=1))
474
if os.WIFEXITED(condition):
475
exitstatus = os.WEXITSTATUS(condition)
476
# Emit D-Bus signal
477
self.CheckerCompleted(dbus.Int16(exitstatus),
478
dbus.Int64(condition),
479
dbus.String(command))
480
else:
481
# Emit D-Bus signal
482
self.CheckerCompleted(dbus.Int16(-1),
483
dbus.Int64(condition),
484
dbus.String(command))
485
486
return Client.checker_callback(self, pid, condition, command,
487
*args, **kwargs)
488
489
def checked_ok(self, *args, **kwargs):
490
r = Client.checked_ok(self, *args, **kwargs)
491
# Emit D-Bus signal
492
self.PropertyChanged(
493
dbus.String(u"last_checked_ok"),
494
(_datetime_to_dbus(self.last_checked_ok,
495
variant_level=1)))
496
return r
497
498
def start_checker(self, *args, **kwargs):
499
old_checker = self.checker
500
if self.checker is not None:
501
old_checker_pid = self.checker.pid
502
else:
503
old_checker_pid = None
504
r = Client.start_checker(self, *args, **kwargs)
505
# Only emit D-Bus signal if new checker process was started
506
if ((self.checker is not None)
507
and not (old_checker is not None
508
and old_checker_pid == self.checker.pid)):
509
self.CheckerStarted(self.current_checker_command)
510
self.PropertyChanged(
511
dbus.String("checker_running"),
512
dbus.Boolean(True, variant_level=1))
513
return r
514
515
def stop_checker(self, *args, **kwargs):
516
old_checker = getattr(self, "checker", None)
517
r = Client.stop_checker(self, *args, **kwargs)
518
if (old_checker is not None
519
and getattr(self, "checker", None) is None):
520
self.PropertyChanged(dbus.String(u"checker_running"),
521
dbus.Boolean(False, variant_level=1))
522
return r
523
524
## D-Bus methods & signals
525
_interface = u"se.bsnet.fukt.Mandos.Client"
526
527
# CheckedOK - method
528
CheckedOK = dbus.service.method(_interface)(checked_ok)
529
CheckedOK.__name__ = "CheckedOK"
530
531
# CheckerCompleted - signal
532
@dbus.service.signal(_interface, signature="nxs")
533
def CheckerCompleted(self, exitcode, waitstatus, command):
534
"D-Bus signal"
535
pass
536
537
# CheckerStarted - signal
538
@dbus.service.signal(_interface, signature="s")
539
def CheckerStarted(self, command):
540
"D-Bus signal"
541
pass
542
543
# GetAllProperties - method
544
@dbus.service.method(_interface, out_signature="a{sv}")
545
def GetAllProperties(self):
546
"D-Bus method"
547
return dbus.Dictionary({
548
dbus.String("name"):
549
dbus.String(self.name, variant_level=1),
550
dbus.String("fingerprint"):
551
dbus.String(self.fingerprint, variant_level=1),
552
dbus.String("host"):
553
dbus.String(self.host, variant_level=1),
554
dbus.String("created"):
555
_datetime_to_dbus(self.created, variant_level=1),
556
dbus.String("last_enabled"):
557
(_datetime_to_dbus(self.last_enabled,
558
variant_level=1)
559
if self.last_enabled is not None
560
else dbus.Boolean(False, variant_level=1)),
561
dbus.String("enabled"):
562
dbus.Boolean(self.enabled, variant_level=1),
563
dbus.String("last_checked_ok"):
564
(_datetime_to_dbus(self.last_checked_ok,
565
variant_level=1)
566
if self.last_checked_ok is not None
567
else dbus.Boolean (False, variant_level=1)),
568
dbus.String("timeout"):
569
dbus.UInt64(self.timeout_milliseconds(),
570
variant_level=1),
571
dbus.String("interval"):
572
dbus.UInt64(self.interval_milliseconds(),
573
variant_level=1),
574
dbus.String("checker"):
575
dbus.String(self.checker_command,
576
variant_level=1),
577
dbus.String("checker_running"):
578
dbus.Boolean(self.checker is not None,
579
variant_level=1),
580
dbus.String("object_path"):
581
dbus.ObjectPath(self.dbus_object_path,
582
variant_level=1)
583
}, signature="sv")
584
585
# IsStillValid - method
586
@dbus.service.method(_interface, out_signature="b")
587
def IsStillValid(self):
588
return self.still_valid()
589
590
# PropertyChanged - signal
591
@dbus.service.signal(_interface, signature="sv")
592
def PropertyChanged(self, property, value):
593
"D-Bus signal"
594
pass
595
596
# ReceivedSecret - signal
597
@dbus.service.signal(_interface)
598
def ReceivedSecret(self):
599
"D-Bus signal"
600
pass
601
602
# Rejected - signal
603
@dbus.service.signal(_interface)
604
def Rejected(self):
605
"D-Bus signal"
606
pass
607
608
# SetChecker - method
609
@dbus.service.method(_interface, in_signature="s")
610
def SetChecker(self, checker):
611
"D-Bus setter method"
612
self.checker_command = checker
613
# Emit D-Bus signal
614
self.PropertyChanged(dbus.String(u"checker"),
615
dbus.String(self.checker_command,
616
variant_level=1))
617
618
# SetHost - method
619
@dbus.service.method(_interface, in_signature="s")
620
def SetHost(self, host):
621
"D-Bus setter method"
622
self.host = host
623
# Emit D-Bus signal
624
self.PropertyChanged(dbus.String(u"host"),
625
dbus.String(self.host, variant_level=1))
626
627
# SetInterval - method
628
@dbus.service.method(_interface, in_signature="t")
629
def SetInterval(self, milliseconds):
630
self.interval = datetime.timedelta(0, 0, 0, milliseconds)
631
# Emit D-Bus signal
632
self.PropertyChanged(dbus.String(u"interval"),
633
(dbus.UInt64(self.interval_milliseconds(),
634
variant_level=1)))
635
636
# SetSecret - method
637
@dbus.service.method(_interface, in_signature="ay",
638
byte_arrays=True)
639
def SetSecret(self, secret):
640
"D-Bus setter method"
641
self.secret = str(secret)
642
643
# SetTimeout - method
644
@dbus.service.method(_interface, in_signature="t")
645
def SetTimeout(self, milliseconds):
646
self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
647
# Emit D-Bus signal
648
self.PropertyChanged(dbus.String(u"timeout"),
649
(dbus.UInt64(self.timeout_milliseconds(),
650
variant_level=1)))
651
652
# Enable - method
653
Enable = dbus.service.method(_interface)(enable)
654
Enable.__name__ = "Enable"
655
656
# StartChecker - method
657
@dbus.service.method(_interface)
658
def StartChecker(self):
659
"D-Bus method"
660
self.start_checker()
661
662
# Disable - method
663
@dbus.service.method(_interface)
664
def Disable(self):
665
"D-Bus method"
666
self.disable()
667
668
# StopChecker - method
669
StopChecker = dbus.service.method(_interface)(stop_checker)
670
StopChecker.__name__ = "StopChecker"
671
672
del _interface
673
674
675
def peer_certificate(session):
676
"Return the peer's OpenPGP certificate as a bytestring"
677
# If not an OpenPGP certificate...
678
if (gnutls.library.functions
679
.gnutls_certificate_type_get(session._c_object)
680
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
681
# ...do the normal thing
682
return session.peer_certificate
683
list_size = ctypes.c_uint(1)
684
cert_list = (gnutls.library.functions
685
.gnutls_certificate_get_peers
686
(session._c_object, ctypes.byref(list_size)))
687
if not bool(cert_list) and list_size.value != 0:
688
raise gnutls.errors.GNUTLSError("error getting peer"
689
" certificate")
690
if list_size.value == 0:
691
return None
692
cert = cert_list[0]
693
return ctypes.string_at(cert.data, cert.size)
694
695
696
def fingerprint(openpgp):
697
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
698
# New GnuTLS "datum" with the OpenPGP public key
699
datum = (gnutls.library.types
700
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
701
ctypes.POINTER
702
(ctypes.c_ubyte)),
703
ctypes.c_uint(len(openpgp))))
704
# New empty GnuTLS certificate
705
crt = gnutls.library.types.gnutls_openpgp_crt_t()
706
(gnutls.library.functions
707
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
708
# Import the OpenPGP public key into the certificate
709
(gnutls.library.functions
710
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
711
gnutls.library.constants
712
.GNUTLS_OPENPGP_FMT_RAW))
713
# Verify the self signature in the key
714
crtverify = ctypes.c_uint()
715
(gnutls.library.functions
716
.gnutls_openpgp_crt_verify_self(crt, 0, ctypes.byref(crtverify)))
717
if crtverify.value != 0:
718
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
719
raise gnutls.errors.CertificateSecurityError("Verify failed")
720
# New buffer for the fingerprint
721
buf = ctypes.create_string_buffer(20)
722
buf_len = ctypes.c_size_t()
723
# Get the fingerprint from the certificate into the buffer
724
(gnutls.library.functions
725
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
726
ctypes.byref(buf_len)))
727
# Deinit the certificate
728
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
729
# Convert the buffer to a Python bytestring
730
fpr = ctypes.string_at(buf, buf_len.value)
731
# Convert the bytestring to hexadecimal notation
732
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
733
return hex_fpr
734
735
736
class TCP_handler(SocketServer.BaseRequestHandler, object):
737
"""A TCP request handler class.
738
Instantiated by IPv6_TCPServer for each request to handle it.
739
Note: This will run in its own forked process."""
740
741
def handle(self):
742
logger.info(u"TCP connection from: %s",
743
unicode(self.client_address))
744
logger.debug(u"IPC Pipe FD: %d", self.server.pipe[1])
745
# Open IPC pipe to parent process
746
with closing(os.fdopen(self.server.pipe[1], "w", 1)) as ipc:
747
session = (gnutls.connection
748
.ClientSession(self.request,
749
gnutls.connection
750
.X509Credentials()))
751
752
line = self.request.makefile().readline()
753
logger.debug(u"Protocol version: %r", line)
754
try:
755
if int(line.strip().split()[0]) > 1:
756
raise RuntimeError
757
except (ValueError, IndexError, RuntimeError), error:
758
logger.error(u"Unknown protocol version: %s", error)
759
return
760
761
# Note: gnutls.connection.X509Credentials is really a
762
# generic GnuTLS certificate credentials object so long as
763
# no X.509 keys are added to it. Therefore, we can use it
764
# here despite using OpenPGP certificates.
765
766
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
767
# "+AES-256-CBC", "+SHA1",
768
# "+COMP-NULL", "+CTYPE-OPENPGP",
769
# "+DHE-DSS"))
770
# Use a fallback default, since this MUST be set.
771
priority = self.server.settings.get("priority", "NORMAL")
772
(gnutls.library.functions
773
.gnutls_priority_set_direct(session._c_object,
774
priority, None))
775
776
try:
777
session.handshake()
778
except gnutls.errors.GNUTLSError, error:
779
logger.warning(u"Handshake failed: %s", error)
780
# Do not run session.bye() here: the session is not
781
# established. Just abandon the request.
782
return
783
logger.debug(u"Handshake succeeded")
784
try:
785
fpr = fingerprint(peer_certificate(session))
786
except (TypeError, gnutls.errors.GNUTLSError), error:
787
logger.warning(u"Bad certificate: %s", error)
788
session.bye()
789
return
790
logger.debug(u"Fingerprint: %s", fpr)
791
792
for c in self.server.clients:
793
if c.fingerprint == fpr:
794
client = c
795
break
796
else:
797
logger.warning(u"Client not found for fingerprint: %s",
798
fpr)
799
ipc.write("NOTFOUND %s\n" % fpr)
800
session.bye()
801
return
802
# Have to check if client.still_valid(), since it is
803
# possible that the client timed out while establishing
804
# the GnuTLS session.
805
if not client.still_valid():
806
logger.warning(u"Client %(name)s is invalid",
807
vars(client))
808
ipc.write("INVALID %s\n" % client.name)
809
session.bye()
810
return
811
ipc.write("SENDING %s\n" % client.name)
812
sent_size = 0
813
while sent_size < len(client.secret):
814
sent = session.send(client.secret[sent_size:])
815
logger.debug(u"Sent: %d, remaining: %d",
816
sent, len(client.secret)
817
- (sent_size + sent))
818
sent_size += sent
819
session.bye()
820
821
822
class ForkingMixInWithPipe(SocketServer.ForkingMixIn, object):
823
"""Like SocketServer.ForkingMixIn, but also pass a pipe.
824
Assumes a gobject.MainLoop event loop.
825
"""
826
def process_request(self, request, client_address):
827
"""This overrides and wraps the original process_request().
828
This function creates a new pipe in self.pipe
829
"""
830
self.pipe = os.pipe()
831
super(ForkingMixInWithPipe,
832
self).process_request(request, client_address)
833
os.close(self.pipe[1]) # close write end
834
# Call "handle_ipc" for both data and EOF events
835
gobject.io_add_watch(self.pipe[0],
836
gobject.IO_IN | gobject.IO_HUP,
837
self.handle_ipc)
838
def handle_ipc(source, condition):
839
"""Dummy function; override as necessary"""
840
os.close(source)
841
return False
842
843
844
class IPv6_TCPServer(ForkingMixInWithPipe,
845
SocketServer.TCPServer, object):
846
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
847
Attributes:
848
settings: Server settings
849
clients: Set() of Client objects
850
enabled: Boolean; whether this server is activated yet
851
"""
852
address_family = socket.AF_INET6
853
def __init__(self, *args, **kwargs):
854
if "settings" in kwargs:
855
self.settings = kwargs["settings"]
856
del kwargs["settings"]
857
if "clients" in kwargs:
858
self.clients = kwargs["clients"]
859
del kwargs["clients"]
860
if "use_ipv6" in kwargs:
861
if not kwargs["use_ipv6"]:
862
self.address_family = socket.AF_INET
863
del kwargs["use_ipv6"]
864
self.enabled = False
865
super(IPv6_TCPServer, self).__init__(*args, **kwargs)
866
def server_bind(self):
867
"""This overrides the normal server_bind() function
868
to bind to an interface if one was specified, and also NOT to
869
bind to an address or port if they were not specified."""
870
if self.settings["interface"]:
871
# 25 is from /usr/include/asm-i486/socket.h
872
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
873
try:
874
self.socket.setsockopt(socket.SOL_SOCKET,
875
SO_BINDTODEVICE,
876
self.settings["interface"])
877
except socket.error, error:
878
if error[0] == errno.EPERM:
879
logger.error(u"No permission to"
880
u" bind to interface %s",
881
self.settings["interface"])
882
else:
883
raise
884
# Only bind(2) the socket if we really need to.
885
if self.server_address[0] or self.server_address[1]:
886
if not self.server_address[0]:
887
if self.address_family == socket.AF_INET6:
888
any_address = "::" # in6addr_any
889
else:
890
any_address = socket.INADDR_ANY
891
self.server_address = (any_address,
892
self.server_address[1])
893
elif not self.server_address[1]:
894
self.server_address = (self.server_address[0],
895
0)
896
# if self.settings["interface"]:
897
# self.server_address = (self.server_address[0],
898
# 0, # port
899
# 0, # flowinfo
900
# if_nametoindex
901
# (self.settings
902
# ["interface"]))
903
return super(IPv6_TCPServer, self).server_bind()
904
def server_activate(self):
905
if self.enabled:
906
return super(IPv6_TCPServer, self).server_activate()
907
def enable(self):
908
self.enabled = True
909
def handle_ipc(self, source, condition, file_objects={}):
910
condition_names = {
911
gobject.IO_IN: "IN", # There is data to read.
912
gobject.IO_OUT: "OUT", # Data can be written (without
913
# blocking).
914
gobject.IO_PRI: "PRI", # There is urgent data to read.
915
gobject.IO_ERR: "ERR", # Error condition.
916
gobject.IO_HUP: "HUP" # Hung up (the connection has been
917
# broken, usually for pipes and
918
# sockets).
919
}
920
conditions_string = ' | '.join(name
921
for cond, name in
922
condition_names.iteritems()
923
if cond & condition)
924
logger.debug("Handling IPC: FD = %d, condition = %s", source,
925
conditions_string)
926
927
# Turn the pipe file descriptor into a Python file object
928
if source not in file_objects:
929
file_objects[source] = os.fdopen(source, "r", 1)
930
931
# Read a line from the file object
932
cmdline = file_objects[source].readline()
933
if not cmdline: # Empty line means end of file
934
# close the IPC pipe
935
file_objects[source].close()
936
del file_objects[source]
937
938
# Stop calling this function
939
return False
940
941
logger.debug("IPC command: %r\n" % cmdline)
942
943
# Parse and act on command
944
cmd, args = cmdline.split(None, 1)
945
if cmd == "NOTFOUND":
946
if self.settings["use_dbus"]:
947
# Emit D-Bus signal
948
mandos_dbus_service.ClientNotFound(args)
949
elif cmd == "INVALID":
950
if self.settings["use_dbus"]:
951
for client in self.clients:
952
if client.name == args:
953
# Emit D-Bus signal
954
client.Rejected()
955
break
956
elif cmd == "SENDING":
957
for client in self.clients:
958
if client.name == args:
959
client.checked_ok()
960
if self.settings["use_dbus"]:
961
# Emit D-Bus signal
962
client.ReceivedSecret()
963
break
964
else:
965
logger.error("Unknown IPC command: %r", cmdline)
966
967
# Keep calling this function
968
return True
969
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
970
127
971
128
def string_to_delta(interval):
972
129
"""Parse a string and return a datetime.timedelta
973
130
974
131
>>> string_to_delta('7d')
975
132
datetime.timedelta(7)
976
133
>>> string_to_delta('60s')
981
138
datetime.timedelta(1)
982
139
>>> string_to_delta(u'1w')
983
140
datetime.timedelta(7)
984
>>> string_to_delta('5m 30s')
985
datetime.timedelta(0, 330)
986
141
"""
987
timevalue = datetime.timedelta(0)
988
for s in interval.split():
989
try:
990
suffix = unicode(s[-1])
991
value = int(s[:-1])
992
if suffix == u"d":
993
delta = datetime.timedelta(value)
994
elif suffix == u"s":
995
delta = datetime.timedelta(0, value)
996
elif suffix == u"m":
997
delta = datetime.timedelta(0, 0, 0, 0, value)
998
elif suffix == u"h":
999
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
1000
elif suffix == u"w":
1001
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1002
else:
1003
raise ValueError
1004
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:
1005
156
raise ValueError
1006
timevalue += delta
1007
return timevalue
1008
1009
1010
def server_state_changed(state):
1011
"""Derived from the Avahi example code"""
1012
if state == avahi.SERVER_COLLISION:
1013
logger.error(u"Zeroconf server name collision")
1014
service.remove()
1015
elif state == avahi.SERVER_RUNNING:
1016
service.add()
1017
1018
1019
def entry_group_state_changed(state, error):
1020
"""Derived from the Avahi example code"""
1021
logger.debug(u"Avahi state change: %i", state)
1022
1023
if state == avahi.ENTRY_GROUP_ESTABLISHED:
1024
logger.debug(u"Zeroconf service established.")
1025
elif state == avahi.ENTRY_GROUP_COLLISION:
1026
logger.warning(u"Zeroconf service name collision.")
1027
service.rename()
1028
elif state == avahi.ENTRY_GROUP_FAILURE:
1029
logger.critical(u"Avahi: Error in group state changed %s",
1030
unicode(error))
1031
raise AvahiGroupError(u"State changed: %s" % unicode(error))
1032
1033
def if_nametoindex(interface):
1034
"""Call the C function if_nametoindex(), or equivalent"""
1035
global if_nametoindex
1036
try:
1037
if_nametoindex = (ctypes.cdll.LoadLibrary
1038
(ctypes.util.find_library("c"))
1039
.if_nametoindex)
1040
except (OSError, AttributeError):
1041
if "struct" not in sys.modules:
1042
import struct
1043
if "fcntl" not in sys.modules:
1044
import fcntl
1045
def if_nametoindex(interface):
1046
"Get an interface index the hard way, i.e. using fcntl()"
1047
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1048
with closing(socket.socket()) as s:
1049
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1050
struct.pack("16s16x", interface))
1051
interface_index = struct.unpack("I", ifreq[16:20])[0]
1052
return interface_index
1053
return if_nametoindex(interface)
1054
1055
1056
def daemon(nochdir = False, noclose = False):
1057
"""See daemon(3). Standard BSD Unix function.
1058
This should really exist as os.daemon, but it doesn't (yet)."""
1059
if os.fork():
1060
sys.exit()
1061
os.setsid()
1062
if not nochdir:
1063
os.chdir("/")
1064
if os.fork():
1065
sys.exit()
1066
if not noclose:
1067
# Close all standard open file descriptors
1068
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1069
if not stat.S_ISCHR(os.fstat(null).st_mode):
1070
raise OSError(errno.ENODEV,
1071
"/dev/null not a character device")
1072
os.dup2(null, sys.stdin.fileno())
1073
os.dup2(null, sys.stdout.fileno())
1074
os.dup2(null, sys.stderr.fileno())
1075
if null > 2:
1076
os.close(null)
1077
157
except (ValueError, IndexError):
158
raise ValueError
159
return delta
1078
160
1079
161
def main():
1080
1081
######################################################################
1082
# Parsing of options, both command line and config file
1083
1084
parser = optparse.OptionParser(version = "%%prog %s" % version)
162
parser = OptionParser()
1085
163
parser.add_option("-i", "--interface", type="string",
1086
metavar="IF", help="Bind to interface IF")
1087
parser.add_option("-a", "--address", type="string",
1088
help="Address to listen for requests on")
1089
parser.add_option("-p", "--port", type="int",
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,
1090
179
help="Port number to receive requests on")
1091
parser.add_option("--check", action="store_true",
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,
1092
189
help="Run self-test")
1093
parser.add_option("--debug", action="store_true",
1094
help="Debug mode; run in foreground and log to"
1095
" terminal")
1096
parser.add_option("--priority", type="string", help="GnuTLS"
1097
" priority string (see GnuTLS documentation)")
1098
parser.add_option("--servicename", type="string", metavar="NAME",
1099
help="Zeroconf service name")
1100
parser.add_option("--configdir", type="string",
1101
default="/etc/mandos", metavar="DIR",
1102
help="Directory to search for configuration"
1103
" files")
1104
parser.add_option("--no-dbus", action="store_false",
1105
dest="use_dbus",
1106
help="Do not provide D-Bus system bus"
1107
" interface")
1108
parser.add_option("--no-ipv6", action="store_false",
1109
dest="use_ipv6", help="Do not use IPv6")
1110
options = parser.parse_args()[0]
1111
190
(options, args) = parser.parse_args()
191
1112
192
if options.check:
1113
193
import doctest
1114
194
doctest.testmod()
1115
195
sys.exit()
1116
196
1117
# Default values for config file for server-global settings
1118
server_defaults = { "interface": "",
1119
"address": "",
1120
"port": "",
1121
"debug": "False",
1122
"priority":
1123
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1124
"servicename": "Mandos",
1125
"use_dbus": "True",
1126
"use_ipv6": "True",
1127
}
1128
1129
# Parse config file for server-global settings
1130
server_config = ConfigParser.SafeConfigParser(server_defaults)
1131
del server_defaults
1132
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1133
# Convert the SafeConfigParser object to a dict
1134
server_settings = server_config.defaults()
1135
# Use the appropriate methods on the non-string config options
1136
server_settings["debug"] = server_config.getboolean("DEFAULT",
1137
"debug")
1138
server_settings["use_dbus"] = server_config.getboolean("DEFAULT",
1139
"use_dbus")
1140
server_settings["use_ipv6"] = server_config.getboolean("DEFAULT",
1141
"use_ipv6")
1142
if server_settings["port"]:
1143
server_settings["port"] = server_config.getint("DEFAULT",
1144
"port")
1145
del server_config
1146
1147
# Override the settings from the config file with command line
1148
# options, if set.
1149
for option in ("interface", "address", "port", "debug",
1150
"priority", "servicename", "configdir",
1151
"use_dbus", "use_ipv6"):
1152
value = getattr(options, option)
1153
if value is not None:
1154
server_settings[option] = value
1155
del options
1156
# Now we have our good server settings in "server_settings"
1157
1158
##################################################################
1159
1160
# For convenience
1161
debug = server_settings["debug"]
1162
use_dbus = server_settings["use_dbus"]
1163
use_ipv6 = server_settings["use_ipv6"]
1164
1165
if not debug:
1166
syslogger.setLevel(logging.WARNING)
1167
console.setLevel(logging.WARNING)
1168
1169
if server_settings["servicename"] != "Mandos":
1170
syslogger.setFormatter(logging.Formatter
1171
('Mandos (%s) [%%(process)d]:'
1172
' %%(levelname)s: %%(message)s'
1173
% server_settings["servicename"]))
1174
1175
# Parse config file with clients
1176
client_defaults = { "timeout": "1h",
1177
"interval": "5m",
1178
"checker": "fping -q -- %%(host)s",
1179
"host": "",
1180
}
1181
client_config = ConfigParser.SafeConfigParser(client_defaults)
1182
client_config.read(os.path.join(server_settings["configdir"],
1183
"clients.conf"))
1184
1185
global mandos_dbus_service
1186
mandos_dbus_service = None
1187
1188
clients = Set()
1189
tcp_server = IPv6_TCPServer((server_settings["address"],
1190
server_settings["port"]),
1191
TCP_handler,
1192
settings=server_settings,
1193
clients=clients, use_ipv6=use_ipv6)
1194
pidfilename = "/var/run/mandos.pid"
1195
try:
1196
pidfile = open(pidfilename, "w")
1197
except IOError:
1198
logger.error("Could not open file %r", pidfilename)
1199
1200
try:
1201
uid = pwd.getpwnam("_mandos").pw_uid
1202
gid = pwd.getpwnam("_mandos").pw_gid
1203
except KeyError:
1204
try:
1205
uid = pwd.getpwnam("mandos").pw_uid
1206
gid = pwd.getpwnam("mandos").pw_gid
1207
except KeyError:
1208
try:
1209
uid = pwd.getpwnam("nobody").pw_uid
1210
gid = pwd.getpwnam("nogroup").pw_gid
1211
except KeyError:
1212
uid = 65534
1213
gid = 65534
1214
try:
1215
os.setgid(gid)
1216
os.setuid(uid)
1217
except OSError, error:
1218
if error[0] != errno.EPERM:
1219
raise error
1220
1221
# Enable all possible GnuTLS debugging
1222
if debug:
1223
# "Use a log level over 10 to enable all debugging options."
1224
# - GnuTLS manual
1225
gnutls.library.functions.gnutls_global_set_log_level(11)
1226
1227
@gnutls.library.types.gnutls_log_func
1228
def debug_gnutls(level, string):
1229
logger.debug("GnuTLS: %s", string[:-1])
1230
1231
(gnutls.library.functions
1232
.gnutls_global_set_log_function(debug_gnutls))
1233
1234
global service
1235
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1236
service = AvahiService(name = server_settings["servicename"],
1237
servicetype = "_mandos._tcp",
1238
protocol = protocol)
1239
if server_settings["interface"]:
1240
service.interface = (if_nametoindex
1241
(server_settings["interface"]))
1242
1243
global main_loop
1244
global bus
1245
global server
1246
# From the Avahi example code
1247
DBusGMainLoop(set_as_default=True )
1248
main_loop = gobject.MainLoop()
1249
bus = dbus.SystemBus()
1250
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
1251
avahi.DBUS_PATH_SERVER),
1252
avahi.DBUS_INTERFACE_SERVER)
1253
# End of Avahi example code
1254
if use_dbus:
1255
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
1256
1257
client_class = Client
1258
if use_dbus:
1259
client_class = ClientDBus
1260
clients.update(Set(
1261
client_class(name = section,
1262
config= dict(client_config.items(section)))
1263
for section in client_config.sections()))
1264
if not clients:
1265
logger.warning(u"No clients defined")
1266
1267
if debug:
1268
# Redirect stdin so all checkers get /dev/null
1269
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1270
os.dup2(null, sys.stdin.fileno())
1271
if null > 2:
1272
os.close(null)
1273
else:
1274
# No console logging
1275
logger.removeHandler(console)
1276
# Close all input and output, do double fork, etc.
1277
daemon()
1278
1279
try:
1280
with closing(pidfile):
1281
pid = os.getpid()
1282
pidfile.write(str(pid) + "\n")
1283
del pidfile
1284
except IOError:
1285
logger.error(u"Could not write to file %r with PID %d",
1286
pidfilename, pid)
1287
except NameError:
1288
# "pidfile" was never created
1289
pass
1290
del pidfilename
1291
1292
def cleanup():
1293
"Cleanup function; run on exit"
1294
global group
1295
# From the Avahi example code
1296
if not group is None:
1297
group.Free()
1298
group = None
1299
# End of Avahi example code
1300
1301
while clients:
1302
client = clients.pop()
1303
client.disable_hook = None
1304
client.disable()
1305
1306
atexit.register(cleanup)
1307
1308
if not debug:
1309
signal.signal(signal.SIGINT, signal.SIG_IGN)
1310
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1311
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1312
1313
if use_dbus:
1314
class MandosDBusService(dbus.service.Object):
1315
"""A D-Bus proxy object"""
1316
def __init__(self):
1317
dbus.service.Object.__init__(self, bus, "/")
1318
_interface = u"se.bsnet.fukt.Mandos"
1319
1320
@dbus.service.signal(_interface, signature="oa{sv}")
1321
def ClientAdded(self, objpath, properties):
1322
"D-Bus signal"
1323
pass
1324
1325
@dbus.service.signal(_interface, signature="s")
1326
def ClientNotFound(self, fingerprint):
1327
"D-Bus signal"
1328
pass
1329
1330
@dbus.service.signal(_interface, signature="os")
1331
def ClientRemoved(self, objpath, name):
1332
"D-Bus signal"
1333
pass
1334
1335
@dbus.service.method(_interface, out_signature="ao")
1336
def GetAllClients(self):
1337
"D-Bus method"
1338
return dbus.Array(c.dbus_object_path for c in clients)
1339
1340
@dbus.service.method(_interface, out_signature="a{oa{sv}}")
1341
def GetAllClientsWithProperties(self):
1342
"D-Bus method"
1343
return dbus.Dictionary(
1344
((c.dbus_object_path, c.GetAllProperties())
1345
for c in clients),
1346
signature="oa{sv}")
1347
1348
@dbus.service.method(_interface, in_signature="o")
1349
def RemoveClient(self, object_path):
1350
"D-Bus method"
1351
for c in clients:
1352
if c.dbus_object_path == object_path:
1353
clients.remove(c)
1354
c.remove_from_connection()
1355
# Don't signal anything except ClientRemoved
1356
c.disable(signal=False)
1357
# Emit D-Bus signal
1358
self.ClientRemoved(object_path, c.name)
1359
return
1360
raise KeyError
1361
1362
del _interface
1363
1364
mandos_dbus_service = MandosDBusService()
1365
1366
for client in clients:
1367
if use_dbus:
1368
# Emit D-Bus signal
1369
mandos_dbus_service.ClientAdded(client.dbus_object_path,
1370
client.GetAllProperties())
1371
client.enable()
1372
1373
tcp_server.enable()
1374
tcp_server.server_activate()
1375
1376
# Find out what port we got
1377
service.port = tcp_server.socket.getsockname()[1]
1378
if use_ipv6:
1379
logger.info(u"Now listening on address %r, port %d,"
1380
" flowinfo %d, scope_id %d"
1381
% tcp_server.socket.getsockname())
1382
else: # IPv4
1383
logger.info(u"Now listening on address %r, port %d"
1384
% tcp_server.socket.getsockname())
1385
1386
#service.interface = tcp_server.socket.getsockname()[3]
1387
1388
try:
1389
# From the Avahi example code
1390
server.connect_to_signal("StateChanged", server_state_changed)
1391
try:
1392
server_state_changed(server.GetState())
1393
except dbus.exceptions.DBusException, error:
1394
logger.critical(u"DBusException: %s", error)
1395
sys.exit(1)
1396
# End of Avahi example code
1397
1398
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
1399
lambda *args, **kwargs:
1400
(tcp_server.handle_request
1401
(*args[2:], **kwargs) or True))
1402
1403
logger.debug(u"Starting main loop")
1404
main_loop.run()
1405
except AvahiError, error:
1406
logger.critical(u"AvahiError: %s", error)
1407
sys.exit(1)
1408
except KeyboardInterrupt:
1409
if debug:
1410
print >> sys.stderr
1411
logger.debug("Server received KeyboardInterrupt")
1412
logger.debug("Server exiting")
1413
1414
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__":
1415
240
main()
241
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0