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- Committer: Björn Påhlsson
- Date: 2008-07-20 02:52:20 UTC
- Revision ID: belorn@braxen-20080720025220-r5u0388uy9iu23h6
Added following support:
Pluginbased client handler
rewritten Mandos client
Avahi instead of udp server discovery
openpgp encrypted key support
Passprompt stand alone application for direct console input
Added logging for Mandos server
Pluginbased client handler
rewritten Mandos client
Avahi instead of udp server discovery
openpgp encrypted key support
Passprompt stand alone application for direct console input
Added logging for Mandos server
- files added:
- ca.pem
- files removed:
- .bzr-builddeb
- debian
- debian/po
- files renamed:
- clients.conf => mandos-clients.conf
- plugin-runner.c => plugbasedclient.c
- plugins.d/mandos-client.c => plugins.d/mandosclient.c
- plugins.d/password-prompt.c => plugins.d/passprompt.c
- mandos => server.py
- files modified:
- Makefile
added
removed
server.py
1
1
#!/usr/bin/python
2
# -*- mode: python; coding: utf-8 -*-
3
#
4
# Mandos server - give out binary blobs to connecting clients.
5
#
6
# This program is partly derived from an example program for an Avahi
7
# service publisher, downloaded from
8
# <http://avahi.org/wiki/PythonPublishExample>. This includes the
9
# methods "add", "remove", "server_state_changed",
10
# "entry_group_state_changed", "cleanup", and "activate" in the
11
# "AvahiService" class, and some lines in "main".
12
#
13
# Everything else is
14
# Copyright © 2008,2009 Teddy Hogeborn
15
# Copyright © 2008,2009 Björn Påhlsson
16
#
17
# This program is free software: you can redistribute it and/or modify
18
# it under the terms of the GNU General Public License as published by
19
# the Free Software Foundation, either version 3 of the License, or
20
# (at your option) any later version.
21
#
22
# This program is distributed in the hope that it will be useful,
23
# but WITHOUT ANY WARRANTY; without even the implied warranty of
24
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
25
# GNU General Public License for more details.
26
#
27
# You should have received a copy of the GNU General Public License
28
# along with this program. If not, see
29
# <http://www.gnu.org/licenses/>.
30
#
31
# Contact the authors at <mandos@fukt.bsnet.se>.
32
#
33
34
from __future__ import division, with_statement, absolute_import
35
36
import SocketServer as socketserver
2
3
from __future__ import division
4
5
import SocketServer
37
6
import socket
38
import optparse
7
import select
8
from optparse import OptionParser
39
9
import datetime
40
10
import errno
41
11
import gnutls.crypto
44
14
import gnutls.library.functions
45
15
import gnutls.library.constants
46
16
import gnutls.library.types
47
import ConfigParser as configparser
17
import ConfigParser
48
18
import sys
49
19
import re
50
20
import os
51
21
import signal
22
from sets import Set
52
23
import subprocess
53
import atexit
54
import stat
55
import logging
56
import logging.handlers
57
import pwd
58
import contextlib
59
import struct
60
import fcntl
61
import functools
62
import cPickle as pickle
63
import select
64
24
65
25
import dbus
66
import dbus.service
67
26
import gobject
68
27
import avahi
69
28
from dbus.mainloop.glib import DBusGMainLoop
70
29
import ctypes
71
import ctypes.util
72
import xml.dom.minidom
73
import inspect
74
75
try:
76
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
77
except AttributeError:
78
try:
79
from IN import SO_BINDTODEVICE
80
except ImportError:
81
SO_BINDTODEVICE = None
82
83
84
version = "1.0.14"
85
86
logger = logging.Logger(u'mandos')
87
syslogger = (logging.handlers.SysLogHandler
88
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
89
address = "/dev/log"))
90
syslogger.setFormatter(logging.Formatter
91
(u'Mandos [%(process)d]: %(levelname)s:'
92
u' %(message)s'))
93
logger.addHandler(syslogger)
94
95
console = logging.StreamHandler()
96
console.setFormatter(logging.Formatter(u'%(name)s [%(process)d]:'
97
u' %(levelname)s:'
98
u' %(message)s'))
99
logger.addHandler(console)
100
101
class AvahiError(Exception):
102
def __init__(self, value, *args, **kwargs):
103
self.value = value
104
super(AvahiError, self).__init__(value, *args, **kwargs)
105
def __unicode__(self):
106
return unicode(repr(self.value))
107
108
class AvahiServiceError(AvahiError):
109
pass
110
111
class AvahiGroupError(AvahiError):
112
pass
113
114
115
class AvahiService(object):
116
"""An Avahi (Zeroconf) service.
117
118
Attributes:
119
interface: integer; avahi.IF_UNSPEC or an interface index.
120
Used to optionally bind to the specified interface.
121
name: string; Example: u'Mandos'
122
type: string; Example: u'_mandos._tcp'.
123
See <http://www.dns-sd.org/ServiceTypes.html>
124
port: integer; what port to announce
125
TXT: list of strings; TXT record for the service
126
domain: string; Domain to publish on, default to .local if empty.
127
host: string; Host to publish records for, default is localhost
128
max_renames: integer; maximum number of renames
129
rename_count: integer; counter so we only rename after collisions
130
a sensible number of times
131
group: D-Bus Entry Group
132
server: D-Bus Server
133
bus: dbus.SystemBus()
134
"""
135
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
136
servicetype = None, port = None, TXT = None,
137
domain = u"", host = u"", max_renames = 32768,
138
protocol = avahi.PROTO_UNSPEC, bus = None):
139
self.interface = interface
140
self.name = name
141
self.type = servicetype
142
self.port = port
143
self.TXT = TXT if TXT is not None else []
144
self.domain = domain
145
self.host = host
146
self.rename_count = 0
147
self.max_renames = max_renames
148
self.protocol = protocol
149
self.group = None # our entry group
150
self.server = None
151
self.bus = bus
152
def rename(self):
153
"""Derived from the Avahi example code"""
154
if self.rename_count >= self.max_renames:
155
logger.critical(u"No suitable Zeroconf service name found"
156
u" after %i retries, exiting.",
157
self.rename_count)
158
raise AvahiServiceError(u"Too many renames")
159
self.name = self.server.GetAlternativeServiceName(self.name)
160
logger.info(u"Changing Zeroconf service name to %r ...",
161
unicode(self.name))
162
syslogger.setFormatter(logging.Formatter
163
(u'Mandos (%s) [%%(process)d]:'
164
u' %%(levelname)s: %%(message)s'
165
% self.name))
166
self.remove()
167
self.add()
168
self.rename_count += 1
169
def remove(self):
170
"""Derived from the Avahi example code"""
171
if self.group is not None:
172
self.group.Reset()
173
def add(self):
174
"""Derived from the Avahi example code"""
175
if self.group is None:
176
self.group = dbus.Interface(
177
self.bus.get_object(avahi.DBUS_NAME,
178
self.server.EntryGroupNew()),
179
avahi.DBUS_INTERFACE_ENTRY_GROUP)
180
self.group.connect_to_signal('StateChanged',
181
self
182
.entry_group_state_changed)
183
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
184
self.name, self.type)
185
self.group.AddService(
186
self.interface,
187
self.protocol,
188
dbus.UInt32(0), # flags
189
self.name, self.type,
190
self.domain, self.host,
191
dbus.UInt16(self.port),
192
avahi.string_array_to_txt_array(self.TXT))
193
self.group.Commit()
194
def entry_group_state_changed(self, state, error):
195
"""Derived from the Avahi example code"""
196
logger.debug(u"Avahi state change: %i", state)
197
198
if state == avahi.ENTRY_GROUP_ESTABLISHED:
199
logger.debug(u"Zeroconf service established.")
200
elif state == avahi.ENTRY_GROUP_COLLISION:
201
logger.warning(u"Zeroconf service name collision.")
202
self.rename()
203
elif state == avahi.ENTRY_GROUP_FAILURE:
204
logger.critical(u"Avahi: Error in group state changed %s",
205
unicode(error))
206
raise AvahiGroupError(u"State changed: %s"
207
% unicode(error))
208
def cleanup(self):
209
"""Derived from the Avahi example code"""
210
if self.group is not None:
211
self.group.Free()
212
self.group = None
213
def server_state_changed(self, state):
214
"""Derived from the Avahi example code"""
215
if state == avahi.SERVER_COLLISION:
216
logger.error(u"Zeroconf server name collision")
217
self.remove()
218
elif state == avahi.SERVER_RUNNING:
219
self.add()
220
def activate(self):
221
"""Derived from the Avahi example code"""
222
if self.server is None:
223
self.server = dbus.Interface(
224
self.bus.get_object(avahi.DBUS_NAME,
225
avahi.DBUS_PATH_SERVER),
226
avahi.DBUS_INTERFACE_SERVER)
227
self.server.connect_to_signal(u"StateChanged",
228
self.server_state_changed)
229
self.server_state_changed(self.server.GetState())
30
31
import logging
32
import logging.handlers
33
34
# logghandler.setFormatter(logging.Formatter('%(levelname)s %(message)s')
35
36
logger = logging.Logger('mandos')
37
logger.addHandler(logging.handlers.SysLogHandler(facility = logging.handlers.SysLogHandler.LOG_DAEMON))
38
39
# This variable is used to optionally bind to a specified interface.
40
# It is a global variable to fit in with the other variables from the
41
# Avahi server example code.
42
serviceInterface = avahi.IF_UNSPEC
43
# From the Avahi server example code:
44
serviceName = "Mandos"
45
serviceType = "_mandos._tcp" # http://www.dns-sd.org/ServiceTypes.html
46
servicePort = None # Not known at startup
47
serviceTXT = [] # TXT record for the service
48
domain = "" # Domain to publish on, default to .local
49
host = "" # Host to publish records for, default to localhost
50
group = None #our entry group
51
rename_count = 12 # Counter so we only rename after collisions a
52
# sensible number of times
53
# End of Avahi example code
230
54
231
55
232
56
class Client(object):
233
57
"""A representation of a client host served by this server.
234
235
58
Attributes:
236
name: string; from the config file, used in log messages and
237
D-Bus identifiers
59
name: string; from the config file, used in log messages
238
60
fingerprint: string (40 or 32 hexadecimal digits); used to
239
61
uniquely identify the client
240
secret: bytestring; sent verbatim (over TLS) to client
241
host: string; available for use by the checker command
242
created: datetime.datetime(); (UTC) object creation
243
last_enabled: datetime.datetime(); (UTC)
244
enabled: bool()
245
last_checked_ok: datetime.datetime(); (UTC) or None
246
timeout: datetime.timedelta(); How long from last_checked_ok
247
until this client is disabled
248
interval: datetime.timedelta(); How often to start a new checker
249
disable_hook: If set, called by disable() as disable_hook(self)
250
checker: subprocess.Popen(); a running checker process used
251
to see if the client lives.
252
'None' if no process is running.
62
secret: bytestring; sent verbatim (over TLS) to client
63
fqdn: string (FQDN); available for use by the checker command
64
created: datetime.datetime()
65
last_seen: datetime.datetime() or None if not yet seen
66
timeout: datetime.timedelta(); How long from last_seen until
67
this client is invalid
68
interval: datetime.timedelta(); How often to start a new checker
69
stop_hook: If set, called by stop() as stop_hook(self)
70
checker: subprocess.Popen(); a running checker process used
71
to see if the client lives.
72
Is None if no process is running.
253
73
checker_initiator_tag: a gobject event source tag, or None
254
disable_initiator_tag: - '' -
74
stop_initiator_tag: - '' -
255
75
checker_callback_tag: - '' -
256
76
checker_command: string; External command which is run to check if
257
client lives. %() expansions are done at
77
client lives. %()s expansions are done at
258
78
runtime with vars(self) as dict, so that for
259
79
instance %(name)s can be used in the command.
260
current_checker_command: string; current running checker_command
80
Private attibutes:
81
_timeout: Real variable for 'timeout'
82
_interval: Real variable for 'interval'
83
_timeout_milliseconds: Used by gobject.timeout_add()
84
_interval_milliseconds: - '' -
261
85
"""
262
263
@staticmethod
264
def _timedelta_to_milliseconds(td):
265
"Convert a datetime.timedelta() to milliseconds"
266
return ((td.days * 24 * 60 * 60 * 1000)
267
+ (td.seconds * 1000)
268
+ (td.microseconds // 1000))
269
270
def timeout_milliseconds(self):
271
"Return the 'timeout' attribute in milliseconds"
272
return self._timedelta_to_milliseconds(self.timeout)
273
274
def interval_milliseconds(self):
275
"Return the 'interval' attribute in milliseconds"
276
return self._timedelta_to_milliseconds(self.interval)
277
278
def __init__(self, name = None, disable_hook=None, config=None):
279
"""Note: the 'checker' key in 'config' sets the
280
'checker_command' attribute and *not* the 'checker'
281
attribute."""
86
def _set_timeout(self, timeout):
87
"Setter function for 'timeout' attribute"
88
self._timeout = timeout
89
self._timeout_milliseconds = ((self.timeout.days
90
* 24 * 60 * 60 * 1000)
91
+ (self.timeout.seconds * 1000)
92
+ (self.timeout.microseconds
93
// 1000))
94
timeout = property(lambda self: self._timeout,
95
_set_timeout)
96
del _set_timeout
97
def _set_interval(self, interval):
98
"Setter function for 'interval' attribute"
99
self._interval = interval
100
self._interval_milliseconds = ((self.interval.days
101
* 24 * 60 * 60 * 1000)
102
+ (self.interval.seconds
103
* 1000)
104
+ (self.interval.microseconds
105
// 1000))
106
interval = property(lambda self: self._interval,
107
_set_interval)
108
del _set_interval
109
def __init__(self, name=None, options=None, stop_hook=None,
110
fingerprint=None, secret=None, secfile=None, fqdn=None,
111
timeout=None, interval=-1, checker=None):
282
112
self.name = name
283
if config is None:
284
config = {}
285
logger.debug(u"Creating client %r", self.name)
286
# Uppercase and remove spaces from fingerprint for later
287
# comparison purposes with return value from the fingerprint()
288
# function
289
self.fingerprint = (config[u"fingerprint"].upper()
290
.replace(u" ", u""))
291
logger.debug(u" Fingerprint: %s", self.fingerprint)
292
if u"secret" in config:
293
self.secret = config[u"secret"].decode(u"base64")
294
elif u"secfile" in config:
295
with open(os.path.expanduser(os.path.expandvars
296
(config[u"secfile"])),
297
"rb") as secfile:
298
self.secret = secfile.read()
299
else:
300
raise TypeError(u"No secret or secfile for client %s"
301
% self.name)
302
self.host = config.get(u"host", u"")
303
self.created = datetime.datetime.utcnow()
304
self.enabled = False
305
self.last_enabled = None
306
self.last_checked_ok = None
307
self.timeout = string_to_delta(config[u"timeout"])
308
self.interval = string_to_delta(config[u"interval"])
309
self.disable_hook = disable_hook
113
# Uppercase and remove spaces from fingerprint
114
# for later comparison purposes with return value of
115
# the fingerprint() function
116
self.fingerprint = fingerprint.upper().replace(u" ", u"")
117
if secret:
118
self.secret = secret.decode(u"base64")
119
elif secfile:
120
sf = open(secfile)
121
self.secret = sf.read()
122
sf.close()
123
else:
124
raise RuntimeError(u"No secret or secfile for client %s"
125
% self.name)
126
self.fqdn = fqdn # string
127
self.created = datetime.datetime.now()
128
self.last_seen = None
129
if timeout is None:
130
timeout = options.timeout
131
self.timeout = timeout
132
if interval == -1:
133
interval = options.interval
134
else:
135
interval = string_to_delta(interval)
136
self.interval = interval
137
self.stop_hook = stop_hook
310
138
self.checker = None
311
139
self.checker_initiator_tag = None
312
self.disable_initiator_tag = None
140
self.stop_initiator_tag = None
313
141
self.checker_callback_tag = None
314
self.checker_command = config[u"checker"]
315
self.current_checker_command = None
316
self.last_connect = None
317
318
def enable(self):
319
"""Start this client's checker and timeout hooks"""
320
if getattr(self, u"enabled", False):
321
# Already enabled
322
return
323
self.last_enabled = datetime.datetime.utcnow()
142
self.check_command = checker
143
def start(self):
144
"""Start this clients checker and timeout hooks"""
324
145
# Schedule a new checker to be started an 'interval' from now,
325
146
# and every interval from then on.
326
self.checker_initiator_tag = (gobject.timeout_add
327
(self.interval_milliseconds(),
328
self.start_checker))
329
# Schedule a disable() when 'timeout' has passed
330
self.disable_initiator_tag = (gobject.timeout_add
331
(self.timeout_milliseconds(),
332
self.disable))
333
self.enabled = True
147
self.checker_initiator_tag = gobject.timeout_add\
148
(self._interval_milliseconds,
149
self.start_checker)
334
150
# Also start a new checker *right now*.
335
151
self.start_checker()
336
337
def disable(self, quiet=True):
338
"""Disable this client."""
339
if not getattr(self, "enabled", False):
340
return False
341
if not quiet:
342
logger.info(u"Disabling client %s", self.name)
343
if getattr(self, u"disable_initiator_tag", False):
344
gobject.source_remove(self.disable_initiator_tag)
345
self.disable_initiator_tag = None
346
if getattr(self, u"checker_initiator_tag", False):
152
# Schedule a stop() when 'timeout' has passed
153
self.stop_initiator_tag = gobject.timeout_add\
154
(self._timeout_milliseconds,
155
self.stop)
156
def stop(self):
157
"""Stop this client.
158
The possibility that this client might be restarted is left
159
open, but not currently used."""
160
logger.debug(u"Stopping client %s", self.name)
161
self.secret = None
162
if self.stop_initiator_tag:
163
gobject.source_remove(self.stop_initiator_tag)
164
self.stop_initiator_tag = None
165
if self.checker_initiator_tag:
347
166
gobject.source_remove(self.checker_initiator_tag)
348
167
self.checker_initiator_tag = None
349
168
self.stop_checker()
350
if self.disable_hook:
351
self.disable_hook(self)
352
self.enabled = False
169
if self.stop_hook:
170
self.stop_hook(self)
353
171
# Do not run this again if called by a gobject.timeout_add
354
172
return False
355
356
173
def __del__(self):
357
self.disable_hook = None
358
self.disable()
359
360
def checker_callback(self, pid, condition, command):
174
# Some code duplication here and in stop()
175
if hasattr(self, "stop_initiator_tag") \
176
and self.stop_initiator_tag:
177
gobject.source_remove(self.stop_initiator_tag)
178
self.stop_initiator_tag = None
179
if hasattr(self, "checker_initiator_tag") \
180
and self.checker_initiator_tag:
181
gobject.source_remove(self.checker_initiator_tag)
182
self.checker_initiator_tag = None
183
self.stop_checker()
184
def checker_callback(self, pid, condition):
361
185
"""The checker has completed, so take appropriate actions."""
362
self.checker_callback_tag = None
363
self.checker = None
364
if os.WIFEXITED(condition):
365
exitstatus = os.WEXITSTATUS(condition)
366
if exitstatus == 0:
367
logger.info(u"Checker for %(name)s succeeded",
368
vars(self))
369
self.checked_ok()
370
else:
371
logger.info(u"Checker for %(name)s failed",
372
vars(self))
373
else:
186
now = datetime.datetime.now()
187
if os.WIFEXITED(condition) \
188
and (os.WEXITSTATUS(condition) == 0):
189
logger.debug(u"Checker for %(name)s succeeded",
190
vars(self))
191
self.last_seen = now
192
gobject.source_remove(self.stop_initiator_tag)
193
self.stop_initiator_tag = gobject.timeout_add\
194
(self._timeout_milliseconds,
195
self.stop)
196
if not os.WIFEXITED(condition):
374
197
logger.warning(u"Checker for %(name)s crashed?",
375
198
vars(self))
376
377
def checked_ok(self):
378
"""Bump up the timeout for this client.
379
380
This should only be called when the client has been seen,
381
alive and well.
382
"""
383
self.last_checked_ok = datetime.datetime.utcnow()
384
gobject.source_remove(self.disable_initiator_tag)
385
self.disable_initiator_tag = (gobject.timeout_add
386
(self.timeout_milliseconds(),
387
self.disable))
388
199
else:
200
logger.debug(u"Checker for %(name)s failed",
201
vars(self))
202
self.checker = None
203
self.checker_callback_tag = None
389
204
def start_checker(self):
390
205
"""Start a new checker subprocess if one is not running.
391
392
206
If a checker already exists, leave it running and do
393
207
nothing."""
394
# The reason for not killing a running checker is that if we
395
# did that, then if a checker (for some reason) started
396
# running slowly and taking more than 'interval' time, the
397
# client would inevitably timeout, since no checker would get
398
# a chance to run to completion. If we instead leave running
399
# checkers alone, the checker would have to take more time
400
# than 'timeout' for the client to be disabled, which is as it
401
# should be.
402
403
# If a checker exists, make sure it is not a zombie
404
try:
405
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
406
except (AttributeError, OSError), error:
407
if (isinstance(error, OSError)
408
and error.errno != errno.ECHILD):
409
raise error
410
else:
411
if pid:
412
logger.warning(u"Checker was a zombie")
413
gobject.source_remove(self.checker_callback_tag)
414
self.checker_callback(pid, status,
415
self.current_checker_command)
416
# Start a new checker if needed
417
208
if self.checker is None:
209
logger.debug(u"Starting checker for %s",
210
self.name)
418
211
try:
419
# In case checker_command has exactly one % operator
420
command = self.checker_command % self.host
212
command = self.check_command % self.fqdn
421
213
except TypeError:
422
# Escape attributes for the shell
423
escaped_attrs = dict((key,
424
re.escape(unicode(str(val),
425
errors=
426
u'replace')))
214
escaped_attrs = dict((key, re.escape(str(val)))
427
215
for key, val in
428
216
vars(self).iteritems())
429
217
try:
430
command = self.checker_command % escaped_attrs
218
command = self.check_command % escaped_attrs
431
219
except TypeError, error:
432
logger.error(u'Could not format string "%s":'
433
u' %s', self.checker_command, error)
220
logger.critical(u'Could not format string "%s": %s',
221
self.check_command, error)
434
222
return True # Try again later
435
self.current_checker_command = command
436
223
try:
437
logger.info(u"Starting checker %r for %s",
438
command, self.name)
439
# We don't need to redirect stdout and stderr, since
440
# in normal mode, that is already done by daemon(),
441
# and in debug mode we don't want to. (Stdin is
442
# always replaced by /dev/null.)
443
self.checker = subprocess.Popen(command,
444
close_fds=True,
445
shell=True, cwd=u"/")
446
self.checker_callback_tag = (gobject.child_watch_add
447
(self.checker.pid,
448
self.checker_callback,
449
data=command))
450
# The checker may have completed before the gobject
451
# watch was added. Check for this.
452
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
453
if pid:
454
gobject.source_remove(self.checker_callback_tag)
455
self.checker_callback(pid, status, command)
456
except OSError, error:
224
self.checker = subprocess.\
225
Popen(command,
226
stdout=subprocess.PIPE,
227
close_fds=True, shell=True,
228
cwd="/")
229
self.checker_callback_tag = gobject.\
230
child_watch_add(self.checker.pid,
231
self.\
232
checker_callback)
233
except subprocess.OSError, error:
457
234
logger.error(u"Failed to start subprocess: %s",
458
235
error)
459
236
# Re-run this periodically if run by gobject.timeout_add
460
237
return True
461
462
238
def stop_checker(self):
463
239
"""Force the checker process, if any, to stop."""
464
if self.checker_callback_tag:
465
gobject.source_remove(self.checker_callback_tag)
466
self.checker_callback_tag = None
467
if getattr(self, u"checker", None) is None:
240
if not hasattr(self, "checker") or self.checker is None:
468
241
return
469
logger.debug(u"Stopping checker for %(name)s", vars(self))
470
try:
471
os.kill(self.checker.pid, signal.SIGTERM)
472
#time.sleep(0.5)
473
#if self.checker.poll() is None:
474
# os.kill(self.checker.pid, signal.SIGKILL)
475
except OSError, error:
476
if error.errno != errno.ESRCH: # No such process
477
raise
478
self.checker = None
479
480
481
def dbus_service_property(dbus_interface, signature=u"v",
482
access=u"readwrite", byte_arrays=False):
483
"""Decorators for marking methods of a DBusObjectWithProperties to
484
become properties on the D-Bus.
485
486
The decorated method will be called with no arguments by "Get"
487
and with one argument by "Set".
488
489
The parameters, where they are supported, are the same as
490
dbus.service.method, except there is only "signature", since the
491
type from Get() and the type sent to Set() is the same.
492
"""
493
# Encoding deeply encoded byte arrays is not supported yet by the
494
# "Set" method, so we fail early here:
495
if byte_arrays and signature != u"ay":
496
raise ValueError(u"Byte arrays not supported for non-'ay'"
497
u" signature %r" % signature)
498
def decorator(func):
499
func._dbus_is_property = True
500
func._dbus_interface = dbus_interface
501
func._dbus_signature = signature
502
func._dbus_access = access
503
func._dbus_name = func.__name__
504
if func._dbus_name.endswith(u"_dbus_property"):
505
func._dbus_name = func._dbus_name[:-14]
506
func._dbus_get_args_options = {u'byte_arrays': byte_arrays }
507
return func
508
return decorator
509
510
511
class DBusPropertyException(dbus.exceptions.DBusException):
512
"""A base class for D-Bus property-related exceptions
513
"""
514
def __unicode__(self):
515
return unicode(str(self))
516
517
518
class DBusPropertyAccessException(DBusPropertyException):
519
"""A property's access permissions disallows an operation.
520
"""
521
pass
522
523
524
class DBusPropertyNotFound(DBusPropertyException):
525
"""An attempt was made to access a non-existing property.
526
"""
527
pass
528
529
530
class DBusObjectWithProperties(dbus.service.Object):
531
"""A D-Bus object with properties.
532
533
Classes inheriting from this can use the dbus_service_property
534
decorator to expose methods as D-Bus properties. It exposes the
535
standard Get(), Set(), and GetAll() methods on the D-Bus.
536
"""
537
538
@staticmethod
539
def _is_dbus_property(obj):
540
return getattr(obj, u"_dbus_is_property", False)
541
542
def _get_all_dbus_properties(self):
543
"""Returns a generator of (name, attribute) pairs
544
"""
545
return ((prop._dbus_name, prop)
546
for name, prop in
547
inspect.getmembers(self, self._is_dbus_property))
548
549
def _get_dbus_property(self, interface_name, property_name):
550
"""Returns a bound method if one exists which is a D-Bus
551
property with the specified name and interface.
552
"""
553
for name in (property_name,
554
property_name + u"_dbus_property"):
555
prop = getattr(self, name, None)
556
if (prop is None
557
or not self._is_dbus_property(prop)
558
or prop._dbus_name != property_name
559
or (interface_name and prop._dbus_interface
560
and interface_name != prop._dbus_interface)):
561
continue
562
return prop
563
# No such property
564
raise DBusPropertyNotFound(self.dbus_object_path + u":"
565
+ interface_name + u"."
566
+ property_name)
567
568
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ss",
569
out_signature=u"v")
570
def Get(self, interface_name, property_name):
571
"""Standard D-Bus property Get() method, see D-Bus standard.
572
"""
573
prop = self._get_dbus_property(interface_name, property_name)
574
if prop._dbus_access == u"write":
575
raise DBusPropertyAccessException(property_name)
576
value = prop()
577
if not hasattr(value, u"variant_level"):
578
return value
579
return type(value)(value, variant_level=value.variant_level+1)
580
581
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ssv")
582
def Set(self, interface_name, property_name, value):
583
"""Standard D-Bus property Set() method, see D-Bus standard.
584
"""
585
prop = self._get_dbus_property(interface_name, property_name)
586
if prop._dbus_access == u"read":
587
raise DBusPropertyAccessException(property_name)
588
if prop._dbus_get_args_options[u"byte_arrays"]:
589
# The byte_arrays option is not supported yet on
590
# signatures other than "ay".
591
if prop._dbus_signature != u"ay":
592
raise ValueError
593
value = dbus.ByteArray(''.join(unichr(byte)
594
for byte in value))
595
prop(value)
596
597
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"s",
598
out_signature=u"a{sv}")
599
def GetAll(self, interface_name):
600
"""Standard D-Bus property GetAll() method, see D-Bus
601
standard.
602
603
Note: Will not include properties with access="write".
604
"""
605
all = {}
606
for name, prop in self._get_all_dbus_properties():
607
if (interface_name
608
and interface_name != prop._dbus_interface):
609
# Interface non-empty but did not match
610
continue
611
# Ignore write-only properties
612
if prop._dbus_access == u"write":
613
continue
614
value = prop()
615
if not hasattr(value, u"variant_level"):
616
all[name] = value
617
continue
618
all[name] = type(value)(value, variant_level=
619
value.variant_level+1)
620
return dbus.Dictionary(all, signature=u"sv")
621
622
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
623
out_signature=u"s",
624
path_keyword='object_path',
625
connection_keyword='connection')
626
def Introspect(self, object_path, connection):
627
"""Standard D-Bus method, overloaded to insert property tags.
628
"""
629
xmlstring = dbus.service.Object.Introspect(self, object_path,
630
connection)
631
try:
632
document = xml.dom.minidom.parseString(xmlstring)
633
def make_tag(document, name, prop):
634
e = document.createElement(u"property")
635
e.setAttribute(u"name", name)
636
e.setAttribute(u"type", prop._dbus_signature)
637
e.setAttribute(u"access", prop._dbus_access)
638
return e
639
for if_tag in document.getElementsByTagName(u"interface"):
640
for tag in (make_tag(document, name, prop)
641
for name, prop
642
in self._get_all_dbus_properties()
643
if prop._dbus_interface
644
== if_tag.getAttribute(u"name")):
645
if_tag.appendChild(tag)
646
# Add the names to the return values for the
647
# "org.freedesktop.DBus.Properties" methods
648
if (if_tag.getAttribute(u"name")
649
== u"org.freedesktop.DBus.Properties"):
650
for cn in if_tag.getElementsByTagName(u"method"):
651
if cn.getAttribute(u"name") == u"Get":
652
for arg in cn.getElementsByTagName(u"arg"):
653
if (arg.getAttribute(u"direction")
654
== u"out"):
655
arg.setAttribute(u"name", u"value")
656
elif cn.getAttribute(u"name") == u"GetAll":
657
for arg in cn.getElementsByTagName(u"arg"):
658
if (arg.getAttribute(u"direction")
659
== u"out"):
660
arg.setAttribute(u"name", u"props")
661
xmlstring = document.toxml(u"utf-8")
662
document.unlink()
663
except (AttributeError, xml.dom.DOMException,
664
xml.parsers.expat.ExpatError), error:
665
logger.error(u"Failed to override Introspection method",
666
error)
667
return xmlstring
668
669
670
class ClientDBus(Client, DBusObjectWithProperties):
671
"""A Client class using D-Bus
672
673
Attributes:
674
dbus_object_path: dbus.ObjectPath
675
bus: dbus.SystemBus()
676
"""
677
# dbus.service.Object doesn't use super(), so we can't either.
678
679
def __init__(self, bus = None, *args, **kwargs):
680
self.bus = bus
681
Client.__init__(self, *args, **kwargs)
682
# Only now, when this client is initialized, can it show up on
683
# the D-Bus
684
self.dbus_object_path = (dbus.ObjectPath
685
(u"/clients/"
686
+ self.name.replace(u".", u"_")))
687
DBusObjectWithProperties.__init__(self, self.bus,
688
self.dbus_object_path)
689
690
@staticmethod
691
def _datetime_to_dbus(dt, variant_level=0):
692
"""Convert a UTC datetime.datetime() to a D-Bus type."""
693
return dbus.String(dt.isoformat(),
694
variant_level=variant_level)
695
696
def enable(self):
697
oldstate = getattr(self, u"enabled", False)
698
r = Client.enable(self)
699
if oldstate != self.enabled:
700
# Emit D-Bus signals
701
self.PropertyChanged(dbus.String(u"enabled"),
702
dbus.Boolean(True, variant_level=1))
703
self.PropertyChanged(
704
dbus.String(u"last_enabled"),
705
self._datetime_to_dbus(self.last_enabled,
706
variant_level=1))
707
return r
708
709
def disable(self, quiet = False):
710
oldstate = getattr(self, u"enabled", False)
711
r = Client.disable(self, quiet=quiet)
712
if not quiet and oldstate != self.enabled:
713
# Emit D-Bus signal
714
self.PropertyChanged(dbus.String(u"enabled"),
715
dbus.Boolean(False, variant_level=1))
716
return r
717
718
def __del__(self, *args, **kwargs):
719
try:
720
self.remove_from_connection()
721
except LookupError:
722
pass
723
if hasattr(DBusObjectWithProperties, u"__del__"):
724
DBusObjectWithProperties.__del__(self, *args, **kwargs)
725
Client.__del__(self, *args, **kwargs)
726
727
def checker_callback(self, pid, condition, command,
728
*args, **kwargs):
242
gobject.source_remove(self.checker_callback_tag)
729
243
self.checker_callback_tag = None
244
os.kill(self.checker.pid, signal.SIGTERM)
245
if self.checker.poll() is None:
246
os.kill(self.checker.pid, signal.SIGKILL)
730
247
self.checker = None
731
# Emit D-Bus signal
732
self.PropertyChanged(dbus.String(u"checker_running"),
733
dbus.Boolean(False, variant_level=1))
734
if os.WIFEXITED(condition):
735
exitstatus = os.WEXITSTATUS(condition)
736
# Emit D-Bus signal
737
self.CheckerCompleted(dbus.Int16(exitstatus),
738
dbus.Int64(condition),
739
dbus.String(command))
740
else:
741
# Emit D-Bus signal
742
self.CheckerCompleted(dbus.Int16(-1),
743
dbus.Int64(condition),
744
dbus.String(command))
745
746
return Client.checker_callback(self, pid, condition, command,
747
*args, **kwargs)
748
749
def checked_ok(self, *args, **kwargs):
750
r = Client.checked_ok(self, *args, **kwargs)
751
# Emit D-Bus signal
752
self.PropertyChanged(
753
dbus.String(u"last_checked_ok"),
754
(self._datetime_to_dbus(self.last_checked_ok,
755
variant_level=1)))
756
return r
757
758
def start_checker(self, *args, **kwargs):
759
old_checker = self.checker
760
if self.checker is not None:
761
old_checker_pid = self.checker.pid
762
else:
763
old_checker_pid = None
764
r = Client.start_checker(self, *args, **kwargs)
765
# Only if new checker process was started
766
if (self.checker is not None
767
and old_checker_pid != self.checker.pid):
768
# Emit D-Bus signal
769
self.CheckerStarted(self.current_checker_command)
770
self.PropertyChanged(
771
dbus.String(u"checker_running"),
772
dbus.Boolean(True, variant_level=1))
773
return r
774
775
def stop_checker(self, *args, **kwargs):
776
old_checker = getattr(self, u"checker", None)
777
r = Client.stop_checker(self, *args, **kwargs)
778
if (old_checker is not None
779
and getattr(self, u"checker", None) is None):
780
self.PropertyChanged(dbus.String(u"checker_running"),
781
dbus.Boolean(False, variant_level=1))
782
return r
783
784
## D-Bus methods, signals & properties
785
_interface = u"se.bsnet.fukt.Mandos.Client"
786
787
## Signals
788
789
# CheckerCompleted - signal
790
@dbus.service.signal(_interface, signature=u"nxs")
791
def CheckerCompleted(self, exitcode, waitstatus, command):
792
"D-Bus signal"
793
pass
794
795
# CheckerStarted - signal
796
@dbus.service.signal(_interface, signature=u"s")
797
def CheckerStarted(self, command):
798
"D-Bus signal"
799
pass
800
801
# PropertyChanged - signal
802
@dbus.service.signal(_interface, signature=u"sv")
803
def PropertyChanged(self, property, value):
804
"D-Bus signal"
805
pass
806
807
# GotSecret - signal
808
@dbus.service.signal(_interface)
809
def GotSecret(self):
810
"D-Bus signal"
811
pass
812
813
# Rejected - signal
814
@dbus.service.signal(_interface)
815
def Rejected(self):
816
"D-Bus signal"
817
pass
818
819
## Methods
820
821
# CheckedOK - method
822
@dbus.service.method(_interface)
823
def CheckedOK(self):
824
return self.checked_ok()
825
826
# Enable - method
827
@dbus.service.method(_interface)
828
def Enable(self):
829
"D-Bus method"
830
self.enable()
831
832
# StartChecker - method
833
@dbus.service.method(_interface)
834
def StartChecker(self):
835
"D-Bus method"
836
self.start_checker()
837
838
# Disable - method
839
@dbus.service.method(_interface)
840
def Disable(self):
841
"D-Bus method"
842
self.disable()
843
844
# StopChecker - method
845
@dbus.service.method(_interface)
846
def StopChecker(self):
847
self.stop_checker()
848
849
## Properties
850
851
# name - property
852
@dbus_service_property(_interface, signature=u"s", access=u"read")
853
def name_dbus_property(self):
854
return dbus.String(self.name)
855
856
# fingerprint - property
857
@dbus_service_property(_interface, signature=u"s", access=u"read")
858
def fingerprint_dbus_property(self):
859
return dbus.String(self.fingerprint)
860
861
# host - property
862
@dbus_service_property(_interface, signature=u"s",
863
access=u"readwrite")
864
def host_dbus_property(self, value=None):
865
if value is None: # get
866
return dbus.String(self.host)
867
self.host = value
868
# Emit D-Bus signal
869
self.PropertyChanged(dbus.String(u"host"),
870
dbus.String(value, variant_level=1))
871
872
# created - property
873
@dbus_service_property(_interface, signature=u"s", access=u"read")
874
def created_dbus_property(self):
875
return dbus.String(self._datetime_to_dbus(self.created))
876
877
# last_enabled - property
878
@dbus_service_property(_interface, signature=u"s", access=u"read")
879
def last_enabled_dbus_property(self):
880
if self.last_enabled is None:
881
return dbus.String(u"")
882
return dbus.String(self._datetime_to_dbus(self.last_enabled))
883
884
# enabled - property
885
@dbus_service_property(_interface, signature=u"b",
886
access=u"readwrite")
887
def enabled_dbus_property(self, value=None):
888
if value is None: # get
889
return dbus.Boolean(self.enabled)
890
if value:
891
self.enable()
892
else:
893
self.disable()
894
895
# last_checked_ok - property
896
@dbus_service_property(_interface, signature=u"s",
897
access=u"readwrite")
898
def last_checked_ok_dbus_property(self, value=None):
899
if value is not None:
900
self.checked_ok()
901
return
902
if self.last_checked_ok is None:
903
return dbus.String(u"")
904
return dbus.String(self._datetime_to_dbus(self
905
.last_checked_ok))
906
907
# timeout - property
908
@dbus_service_property(_interface, signature=u"t",
909
access=u"readwrite")
910
def timeout_dbus_property(self, value=None):
911
if value is None: # get
912
return dbus.UInt64(self.timeout_milliseconds())
913
self.timeout = datetime.timedelta(0, 0, 0, value)
914
# Emit D-Bus signal
915
self.PropertyChanged(dbus.String(u"timeout"),
916
dbus.UInt64(value, variant_level=1))
917
if getattr(self, u"disable_initiator_tag", None) is None:
918
return
919
# Reschedule timeout
920
gobject.source_remove(self.disable_initiator_tag)
921
self.disable_initiator_tag = None
922
time_to_die = (self.
923
_timedelta_to_milliseconds((self
924
.last_checked_ok
925
+ self.timeout)
926
- datetime.datetime
927
.utcnow()))
928
if time_to_die <= 0:
929
# The timeout has passed
930
self.disable()
931
else:
932
self.disable_initiator_tag = (gobject.timeout_add
933
(time_to_die, self.disable))
934
935
# interval - property
936
@dbus_service_property(_interface, signature=u"t",
937
access=u"readwrite")
938
def interval_dbus_property(self, value=None):
939
if value is None: # get
940
return dbus.UInt64(self.interval_milliseconds())
941
self.interval = datetime.timedelta(0, 0, 0, value)
942
# Emit D-Bus signal
943
self.PropertyChanged(dbus.String(u"interval"),
944
dbus.UInt64(value, variant_level=1))
945
if getattr(self, u"checker_initiator_tag", None) is None:
946
return
947
# Reschedule checker run
948
gobject.source_remove(self.checker_initiator_tag)
949
self.checker_initiator_tag = (gobject.timeout_add
950
(value, self.start_checker))
951
self.start_checker() # Start one now, too
952
953
# checker - property
954
@dbus_service_property(_interface, signature=u"s",
955
access=u"readwrite")
956
def checker_dbus_property(self, value=None):
957
if value is None: # get
958
return dbus.String(self.checker_command)
959
self.checker_command = value
960
# Emit D-Bus signal
961
self.PropertyChanged(dbus.String(u"checker"),
962
dbus.String(self.checker_command,
963
variant_level=1))
964
965
# checker_running - property
966
@dbus_service_property(_interface, signature=u"b",
967
access=u"readwrite")
968
def checker_running_dbus_property(self, value=None):
969
if value is None: # get
970
return dbus.Boolean(self.checker is not None)
971
if value:
972
self.start_checker()
973
else:
974
self.stop_checker()
975
976
# object_path - property
977
@dbus_service_property(_interface, signature=u"o", access=u"read")
978
def object_path_dbus_property(self):
979
return self.dbus_object_path # is already a dbus.ObjectPath
980
981
# secret = property
982
@dbus_service_property(_interface, signature=u"ay",
983
access=u"write", byte_arrays=True)
984
def secret_dbus_property(self, value):
985
self.secret = str(value)
986
987
del _interface
988
989
990
class ClientHandler(socketserver.BaseRequestHandler, object):
991
"""A class to handle client connections.
992
993
Instantiated once for each connection to handle it.
248
def still_valid(self, now=None):
249
"""Has the timeout not yet passed for this client?"""
250
if now is None:
251
now = datetime.datetime.now()
252
if self.last_seen is None:
253
return now < (self.created + self.timeout)
254
else:
255
return now < (self.last_seen + self.timeout)
256
257
258
def peer_certificate(session):
259
# If not an OpenPGP certificate...
260
if gnutls.library.functions.gnutls_certificate_type_get\
261
(session._c_object) \
262
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP:
263
# ...do the normal thing
264
return session.peer_certificate
265
list_size = ctypes.c_uint()
266
cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
267
(session._c_object, ctypes.byref(list_size))
268
if list_size.value == 0:
269
return None
270
cert = cert_list[0]
271
return ctypes.string_at(cert.data, cert.size)
272
273
274
def fingerprint(openpgp):
275
# New empty GnuTLS certificate
276
crt = gnutls.library.types.gnutls_openpgp_crt_t()
277
gnutls.library.functions.gnutls_openpgp_crt_init\
278
(ctypes.byref(crt))
279
# New GnuTLS "datum" with the OpenPGP public key
280
datum = gnutls.library.types.gnutls_datum_t\
281
(ctypes.cast(ctypes.c_char_p(openpgp),
282
ctypes.POINTER(ctypes.c_ubyte)),
283
ctypes.c_uint(len(openpgp)))
284
# Import the OpenPGP public key into the certificate
285
ret = gnutls.library.functions.gnutls_openpgp_crt_import\
286
(crt,
287
ctypes.byref(datum),
288
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
289
# New buffer for the fingerprint
290
buffer = ctypes.create_string_buffer(20)
291
buffer_length = ctypes.c_size_t()
292
# Get the fingerprint from the certificate into the buffer
293
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
294
(crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
295
# Deinit the certificate
296
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
297
# Convert the buffer to a Python bytestring
298
fpr = ctypes.string_at(buffer, buffer_length.value)
299
# Convert the bytestring to hexadecimal notation
300
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
301
return hex_fpr
302
303
304
class tcp_handler(SocketServer.BaseRequestHandler, object):
305
"""A TCP request handler class.
306
Instantiated by IPv6_TCPServer for each request to handle it.
994
307
Note: This will run in its own forked process."""
995
308
996
309
def handle(self):
997
logger.info(u"TCP connection from: %s",
998
unicode(self.client_address))
999
logger.debug(u"IPC Pipe FD: %d",
1000
self.server.child_pipe[1].fileno())
1001
# Open IPC pipe to parent process
1002
with contextlib.nested(self.server.child_pipe[1],
1003
self.server.parent_pipe[0]
1004
) as (ipc, ipc_return):
1005
session = (gnutls.connection
1006
.ClientSession(self.request,
1007
gnutls.connection
1008
.X509Credentials()))
1009
1010
# Note: gnutls.connection.X509Credentials is really a
1011
# generic GnuTLS certificate credentials object so long as
1012
# no X.509 keys are added to it. Therefore, we can use it
1013
# here despite using OpenPGP certificates.
1014
1015
#priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
1016
# u"+AES-256-CBC", u"+SHA1",
1017
# u"+COMP-NULL", u"+CTYPE-OPENPGP",
1018
# u"+DHE-DSS"))
1019
# Use a fallback default, since this MUST be set.
1020
priority = self.server.gnutls_priority
1021
if priority is None:
1022
priority = u"NORMAL"
1023
(gnutls.library.functions
1024
.gnutls_priority_set_direct(session._c_object,
1025
priority, None))
1026
1027
# Start communication using the Mandos protocol
1028
# Get protocol number
1029
line = self.request.makefile().readline()
1030
logger.debug(u"Protocol version: %r", line)
1031
try:
1032
if int(line.strip().split()[0]) > 1:
1033
raise RuntimeError
1034
except (ValueError, IndexError, RuntimeError), error:
1035
logger.error(u"Unknown protocol version: %s", error)
1036
return
1037
1038
# Start GnuTLS connection
1039
try:
1040
session.handshake()
1041
except gnutls.errors.GNUTLSError, error:
1042
logger.warning(u"Handshake failed: %s", error)
1043
# Do not run session.bye() here: the session is not
1044
# established. Just abandon the request.
1045
return
1046
logger.debug(u"Handshake succeeded")
1047
try:
1048
try:
1049
fpr = self.fingerprint(self.peer_certificate
1050
(session))
1051
except (TypeError, gnutls.errors.GNUTLSError), error:
1052
logger.warning(u"Bad certificate: %s", error)
1053
return
1054
logger.debug(u"Fingerprint: %s", fpr)
1055
1056
for c in self.server.clients:
1057
if c.fingerprint == fpr:
1058
client = c
1059
break
1060
else:
1061
ipc.write(u"NOTFOUND %s %s\n"
1062
% (fpr, unicode(self.client_address)))
1063
return
1064
1065
class ClientProxy(object):
1066
"""Client proxy object. Not for calling methods."""
1067
def __init__(self, client):
1068
self.client = client
1069
def __getattr__(self, name):
1070
if name.startswith("ipc_"):
1071
def tempfunc():
1072
ipc.write("%s %s\n" % (name[4:].upper(),
1073
self.client.name))
1074
return tempfunc
1075
if not hasattr(self.client, name):
1076
raise AttributeError
1077
ipc.write(u"GETATTR %s %s\n"
1078
% (name, self.client.fingerprint))
1079
return pickle.load(ipc_return)
1080
clientproxy = ClientProxy(client)
1081
# Have to check if client.enabled, since it is
1082
# possible that the client was disabled since the
1083
# GnuTLS session was established.
1084
if not clientproxy.enabled:
1085
clientproxy.ipc_disabled()
1086
return
1087
1088
clientproxy.ipc_sending()
1089
sent_size = 0
1090
while sent_size < len(client.secret):
1091
sent = session.send(client.secret[sent_size:])
1092
logger.debug(u"Sent: %d, remaining: %d",
1093
sent, len(client.secret)
1094
- (sent_size + sent))
1095
sent_size += sent
1096
finally:
1097
session.bye()
1098
1099
@staticmethod
1100
def peer_certificate(session):
1101
"Return the peer's OpenPGP certificate as a bytestring"
1102
# If not an OpenPGP certificate...
1103
if (gnutls.library.functions
1104
.gnutls_certificate_type_get(session._c_object)
1105
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1106
# ...do the normal thing
1107
return session.peer_certificate
1108
list_size = ctypes.c_uint(1)
1109
cert_list = (gnutls.library.functions
1110
.gnutls_certificate_get_peers
1111
(session._c_object, ctypes.byref(list_size)))
1112
if not bool(cert_list) and list_size.value != 0:
1113
raise gnutls.errors.GNUTLSError(u"error getting peer"
1114
u" certificate")
1115
if list_size.value == 0:
1116
return None
1117
cert = cert_list[0]
1118
return ctypes.string_at(cert.data, cert.size)
1119
1120
@staticmethod
1121
def fingerprint(openpgp):
1122
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1123
# New GnuTLS "datum" with the OpenPGP public key
1124
datum = (gnutls.library.types
1125
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1126
ctypes.POINTER
1127
(ctypes.c_ubyte)),
1128
ctypes.c_uint(len(openpgp))))
1129
# New empty GnuTLS certificate
1130
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1131
(gnutls.library.functions
1132
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1133
# Import the OpenPGP public key into the certificate
1134
(gnutls.library.functions
1135
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1136
gnutls.library.constants
1137
.GNUTLS_OPENPGP_FMT_RAW))
1138
# Verify the self signature in the key
1139
crtverify = ctypes.c_uint()
1140
(gnutls.library.functions
1141
.gnutls_openpgp_crt_verify_self(crt, 0,
1142
ctypes.byref(crtverify)))
1143
if crtverify.value != 0:
1144
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1145
raise (gnutls.errors.CertificateSecurityError
1146
(u"Verify failed"))
1147
# New buffer for the fingerprint
1148
buf = ctypes.create_string_buffer(20)
1149
buf_len = ctypes.c_size_t()
1150
# Get the fingerprint from the certificate into the buffer
1151
(gnutls.library.functions
1152
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1153
ctypes.byref(buf_len)))
1154
# Deinit the certificate
1155
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1156
# Convert the buffer to a Python bytestring
1157
fpr = ctypes.string_at(buf, buf_len.value)
1158
# Convert the bytestring to hexadecimal notation
1159
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
1160
return hex_fpr
1161
1162
1163
class ForkingMixInWithPipes(socketserver.ForkingMixIn, object):
1164
"""Like socketserver.ForkingMixIn, but also pass a pipe pair."""
1165
def process_request(self, request, client_address):
1166
"""Overrides and wraps the original process_request().
1167
1168
This function creates a new pipe in self.pipe
1169
"""
1170
# Child writes to child_pipe
1171
self.child_pipe = map(os.fdopen, os.pipe(), u"rw", (1, 0))
1172
# Parent writes to parent_pipe
1173
self.parent_pipe = map(os.fdopen, os.pipe(), u"rw", (1, 0))
1174
super(ForkingMixInWithPipes,
1175
self).process_request(request, client_address)
1176
# Close unused ends for parent
1177
self.parent_pipe[0].close() # close read end
1178
self.child_pipe[1].close() # close write end
1179
self.add_pipe_fds(self.child_pipe[0], self.parent_pipe[1])
1180
def add_pipe_fds(self, child_pipe_fd, parent_pipe_fd):
1181
"""Dummy function; override as necessary"""
1182
child_pipe_fd.close()
1183
parent_pipe_fd.close()
1184
1185
1186
class IPv6_TCPServer(ForkingMixInWithPipes,
1187
socketserver.TCPServer, object):
1188
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1189
310
logger.debug(u"TCP connection from: %s",
311
unicode(self.client_address))
312
session = gnutls.connection.ClientSession(self.request,
313
gnutls.connection.\
314
X509Credentials())
315
316
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
317
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
318
# "+DHE-DSS"))
319
priority = "SECURE256"
320
321
gnutls.library.functions.gnutls_priority_set_direct\
322
(session._c_object, priority, None);
323
324
try:
325
session.handshake()
326
except gnutls.errors.GNUTLSError, error:
327
logger.debug(u"Handshake failed: %s", error)
328
# Do not run session.bye() here: the session is not
329
# established. Just abandon the request.
330
return
331
try:
332
fpr = fingerprint(peer_certificate(session))
333
except (TypeError, gnutls.errors.GNUTLSError), error:
334
logger.debug(u"Bad certificate: %s", error)
335
session.bye()
336
return
337
logger.debug(u"Fingerprint: %s", fpr)
338
client = None
339
for c in clients:
340
if c.fingerprint == fpr:
341
client = c
342
break
343
# Have to check if client.still_valid(), since it is possible
344
# that the client timed out while establishing the GnuTLS
345
# session.
346
if (not client) or (not client.still_valid()):
347
if client:
348
logger.debug(u"Client %(name)s is invalid",
349
vars(client))
350
else:
351
logger.debug(u"Client not found for fingerprint: %s",
352
fpr)
353
session.bye()
354
return
355
sent_size = 0
356
while sent_size < len(client.secret):
357
sent = session.send(client.secret[sent_size:])
358
logger.debug(u"Sent: %d, remaining: %d",
359
sent, len(client.secret)
360
- (sent_size + sent))
361
sent_size += sent
362
session.bye()
363
364
365
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
366
"""IPv6 TCP server. Accepts 'None' as address and/or port.
1190
367
Attributes:
1191
enabled: Boolean; whether this server is activated yet
1192
interface: None or a network interface name (string)
1193
use_ipv6: Boolean; to use IPv6 or not
368
options: Command line options
369
clients: Set() of Client objects
1194
370
"""
1195
def __init__(self, server_address, RequestHandlerClass,
1196
interface=None, use_ipv6=True):
1197
self.interface = interface
1198
if use_ipv6:
1199
self.address_family = socket.AF_INET6
1200
socketserver.TCPServer.__init__(self, server_address,
1201
RequestHandlerClass)
371
address_family = socket.AF_INET6
372
def __init__(self, *args, **kwargs):
373
if "options" in kwargs:
374
self.options = kwargs["options"]
375
del kwargs["options"]
376
if "clients" in kwargs:
377
self.clients = kwargs["clients"]
378
del kwargs["clients"]
379
return super(type(self), self).__init__(*args, **kwargs)
1202
380
def server_bind(self):
1203
381
"""This overrides the normal server_bind() function
1204
382
to bind to an interface if one was specified, and also NOT to
1205
383
bind to an address or port if they were not specified."""
1206
if self.interface is not None:
1207
if SO_BINDTODEVICE is None:
1208
logger.error(u"SO_BINDTODEVICE does not exist;"
1209
u" cannot bind to interface %s",
1210
self.interface)
1211
else:
1212
try:
1213
self.socket.setsockopt(socket.SOL_SOCKET,
1214
SO_BINDTODEVICE,
1215
str(self.interface
1216
+ u'\0'))
1217
except socket.error, error:
1218
if error[0] == errno.EPERM:
1219
logger.error(u"No permission to"
1220
u" bind to interface %s",
1221
self.interface)
1222
elif error[0] == errno.ENOPROTOOPT:
1223
logger.error(u"SO_BINDTODEVICE not available;"
1224
u" cannot bind to interface %s",
1225
self.interface)
1226
else:
1227
raise
384
if self.options.interface:
385
if not hasattr(socket, "SO_BINDTODEVICE"):
386
# From /usr/include/asm-i486/socket.h
387
socket.SO_BINDTODEVICE = 25
388
try:
389
self.socket.setsockopt(socket.SOL_SOCKET,
390
socket.SO_BINDTODEVICE,
391
self.options.interface)
392
except socket.error, error:
393
if error[0] == errno.EPERM:
394
logger.warning(u"No permission to"
395
u" bind to interface %s",
396
self.options.interface)
397
else:
398
raise error
1228
399
# Only bind(2) the socket if we really need to.
1229
400
if self.server_address[0] or self.server_address[1]:
1230
401
if not self.server_address[0]:
1231
if self.address_family == socket.AF_INET6:
1232
any_address = u"::" # in6addr_any
1233
else:
1234
any_address = socket.INADDR_ANY
1235
self.server_address = (any_address,
402
in6addr_any = "::"
403
self.server_address = (in6addr_any,
1236
404
self.server_address[1])
1237
elif not self.server_address[1]:
405
elif self.server_address[1] is None:
1238
406
self.server_address = (self.server_address[0],
1239
407
0)
1240
# if self.interface:
1241
# self.server_address = (self.server_address[0],
1242
# 0, # port
1243
# 0, # flowinfo
1244
# if_nametoindex
1245
# (self.interface))
1246
return socketserver.TCPServer.server_bind(self)
1247
1248
1249
class MandosServer(IPv6_TCPServer):
1250
"""Mandos server.
1251
1252
Attributes:
1253
clients: set of Client objects
1254
gnutls_priority GnuTLS priority string
1255
use_dbus: Boolean; to emit D-Bus signals or not
1256
1257
Assumes a gobject.MainLoop event loop.
1258
"""
1259
def __init__(self, server_address, RequestHandlerClass,
1260
interface=None, use_ipv6=True, clients=None,
1261
gnutls_priority=None, use_dbus=True):
1262
self.enabled = False
1263
self.clients = clients
1264
if self.clients is None:
1265
self.clients = set()
1266
self.use_dbus = use_dbus
1267
self.gnutls_priority = gnutls_priority
1268
IPv6_TCPServer.__init__(self, server_address,
1269
RequestHandlerClass,
1270
interface = interface,
1271
use_ipv6 = use_ipv6)
1272
def server_activate(self):
1273
if self.enabled:
1274
return socketserver.TCPServer.server_activate(self)
1275
def enable(self):
1276
self.enabled = True
1277
def add_pipe_fds(self, child_pipe_fd, parent_pipe_fd):
1278
# Call "handle_ipc" for both data and EOF events
1279
gobject.io_add_watch(child_pipe_fd.fileno(),
1280
gobject.IO_IN | gobject.IO_HUP,
1281
functools.partial(self.handle_ipc,
1282
reply = parent_pipe_fd,
1283
sender= child_pipe_fd))
1284
def handle_ipc(self, source, condition, reply=None, sender=None):
1285
condition_names = {
1286
gobject.IO_IN: u"IN", # There is data to read.
1287
gobject.IO_OUT: u"OUT", # Data can be written (without
1288
# blocking).
1289
gobject.IO_PRI: u"PRI", # There is urgent data to read.
1290
gobject.IO_ERR: u"ERR", # Error condition.
1291
gobject.IO_HUP: u"HUP" # Hung up (the connection has been
1292
# broken, usually for pipes and
1293
# sockets).
1294
}
1295
conditions_string = ' | '.join(name
1296
for cond, name in
1297
condition_names.iteritems()
1298
if cond & condition)
1299
logger.debug(u"Handling IPC: FD = %d, condition = %s", source,
1300
conditions_string)
1301
1302
# Read a line from the file object
1303
cmdline = sender.readline()
1304
if not cmdline: # Empty line means end of file
1305
# close the IPC pipes
1306
sender.close()
1307
reply.close()
1308
1309
# Stop calling this function
1310
return False
1311
1312
logger.debug(u"IPC command: %r", cmdline)
1313
1314
# Parse and act on command
1315
cmd, args = cmdline.rstrip(u"\r\n").split(None, 1)
1316
1317
if cmd == u"NOTFOUND":
1318
fpr, address = args.split(None, 1)
1319
logger.warning(u"Client not found for fingerprint: %s, ad"
1320
u"dress: %s", fpr, address)
1321
if self.use_dbus:
1322
# Emit D-Bus signal
1323
mandos_dbus_service.ClientNotFound(fpr, address)
1324
elif cmd == u"DISABLED":
1325
for client in self.clients:
1326
if client.name == args:
1327
logger.warning(u"Client %s is disabled", args)
1328
if self.use_dbus:
1329
# Emit D-Bus signal
1330
client.Rejected()
1331
break
1332
else:
1333
logger.error(u"Unknown client %s is disabled", args)
1334
elif cmd == u"SENDING":
1335
for client in self.clients:
1336
if client.name == args:
1337
logger.info(u"Sending secret to %s", client.name)
1338
client.checked_ok()
1339
if self.use_dbus:
1340
# Emit D-Bus signal
1341
client.GotSecret()
1342
break
1343
else:
1344
logger.error(u"Sending secret to unknown client %s",
1345
args)
1346
elif cmd == u"GETATTR":
1347
attr_name, fpr = args.split(None, 1)
1348
for client in self.clients:
1349
if client.fingerprint == fpr:
1350
attr_value = getattr(client, attr_name, None)
1351
logger.debug("IPC reply: %r", attr_value)
1352
pickle.dump(attr_value, reply)
1353
break
1354
else:
1355
logger.error(u"Client %s on address %s requesting "
1356
u"attribute %s not found", fpr, address,
1357
attr_name)
1358
pickle.dump(None, reply)
1359
else:
1360
logger.error(u"Unknown IPC command: %r", cmdline)
1361
1362
# Keep calling this function
1363
return True
408
return super(type(self), self).server_bind()
1364
409
1365
410
1366
411
def string_to_delta(interval):
1367
412
"""Parse a string and return a datetime.timedelta
1368
1369
>>> string_to_delta(u'7d')
413
414
>>> string_to_delta('7d')
1370
415
datetime.timedelta(7)
1371
>>> string_to_delta(u'60s')
416
>>> string_to_delta('60s')
1372
417
datetime.timedelta(0, 60)
1373
>>> string_to_delta(u'60m')
418
>>> string_to_delta('60m')
1374
419
datetime.timedelta(0, 3600)
1375
>>> string_to_delta(u'24h')
420
>>> string_to_delta('24h')
1376
421
datetime.timedelta(1)
1377
422
>>> string_to_delta(u'1w')
1378
423
datetime.timedelta(7)
1379
>>> string_to_delta(u'5m 30s')
1380
datetime.timedelta(0, 330)
1381
424
"""
1382
timevalue = datetime.timedelta(0)
1383
for s in interval.split():
1384
try:
1385
suffix = unicode(s[-1])
1386
value = int(s[:-1])
1387
if suffix == u"d":
1388
delta = datetime.timedelta(value)
1389
elif suffix == u"s":
1390
delta = datetime.timedelta(0, value)
1391
elif suffix == u"m":
1392
delta = datetime.timedelta(0, 0, 0, 0, value)
1393
elif suffix == u"h":
1394
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
1395
elif suffix == u"w":
1396
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1397
else:
1398
raise ValueError(u"Unknown suffix %r" % suffix)
1399
except (ValueError, IndexError), e:
1400
raise ValueError(e.message)
1401
timevalue += delta
1402
return timevalue
425
try:
426
suffix=unicode(interval[-1])
427
value=int(interval[:-1])
428
if suffix == u"d":
429
delta = datetime.timedelta(value)
430
elif suffix == u"s":
431
delta = datetime.timedelta(0, value)
432
elif suffix == u"m":
433
delta = datetime.timedelta(0, 0, 0, 0, value)
434
elif suffix == u"h":
435
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
436
elif suffix == u"w":
437
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
438
else:
439
raise ValueError
440
except (ValueError, IndexError):
441
raise ValueError
442
return delta
443
444
445
def add_service():
446
"""From the Avahi server example code"""
447
global group, serviceName, serviceType, servicePort, serviceTXT, \
448
domain, host
449
if group is None:
450
group = dbus.Interface(
451
bus.get_object( avahi.DBUS_NAME,
452
server.EntryGroupNew()),
453
avahi.DBUS_INTERFACE_ENTRY_GROUP)
454
group.connect_to_signal('StateChanged',
455
entry_group_state_changed)
456
logger.debug(u"Adding service '%s' of type '%s' ...",
457
serviceName, serviceType)
458
459
group.AddService(
460
serviceInterface, # interface
461
avahi.PROTO_INET6, # protocol
462
dbus.UInt32(0), # flags
463
serviceName, serviceType,
464
domain, host,
465
dbus.UInt16(servicePort),
466
avahi.string_array_to_txt_array(serviceTXT))
467
group.Commit()
468
469
470
def remove_service():
471
"""From the Avahi server example code"""
472
global group
473
474
if not group is None:
475
group.Reset()
476
477
478
def server_state_changed(state):
479
"""From the Avahi server example code"""
480
if state == avahi.SERVER_COLLISION:
481
logger.warning(u"Server name collision")
482
remove_service()
483
elif state == avahi.SERVER_RUNNING:
484
add_service()
485
486
487
def entry_group_state_changed(state, error):
488
"""From the Avahi server example code"""
489
global serviceName, server, rename_count
490
491
logger.debug(u"state change: %i", state)
492
493
if state == avahi.ENTRY_GROUP_ESTABLISHED:
494
logger.debug(u"Service established.")
495
elif state == avahi.ENTRY_GROUP_COLLISION:
496
497
rename_count = rename_count - 1
498
if rename_count > 0:
499
name = server.GetAlternativeServiceName(name)
500
logger.warning(u"Service name collision, "
501
u"changing name to '%s' ...", name)
502
remove_service()
503
add_service()
504
505
else:
506
logger.error(u"No suitable service name found "
507
u"after %i retries, exiting.",
508
n_rename)
509
main_loop.quit()
510
elif state == avahi.ENTRY_GROUP_FAILURE:
511
logger.error(u"Error in group state changed %s",
512
unicode(error))
513
main_loop.quit()
514
return
1403
515
1404
516
1405
517
def if_nametoindex(interface):
1406
"""Call the C function if_nametoindex(), or equivalent
1407
1408
Note: This function cannot accept a unicode string."""
1409
global if_nametoindex
518
"""Call the C function if_nametoindex()"""
1410
519
try:
1411
if_nametoindex = (ctypes.cdll.LoadLibrary
1412
(ctypes.util.find_library(u"c"))
1413
.if_nametoindex)
520
libc = ctypes.cdll.LoadLibrary("libc.so.6")
521
return libc.if_nametoindex(interface)
1414
522
except (OSError, AttributeError):
1415
logger.warning(u"Doing if_nametoindex the hard way")
1416
def if_nametoindex(interface):
1417
"Get an interface index the hard way, i.e. using fcntl()"
1418
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1419
with contextlib.closing(socket.socket()) as s:
1420
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1421
struct.pack(str(u"16s16x"),
1422
interface))
1423
interface_index = struct.unpack(str(u"I"),
1424
ifreq[16:20])[0]
1425
return interface_index
1426
return if_nametoindex(interface)
1427
1428
1429
def daemon(nochdir = False, noclose = False):
1430
"""See daemon(3). Standard BSD Unix function.
1431
1432
This should really exist as os.daemon, but it doesn't (yet)."""
1433
if os.fork():
1434
sys.exit()
1435
os.setsid()
1436
if not nochdir:
1437
os.chdir(u"/")
1438
if os.fork():
1439
sys.exit()
1440
if not noclose:
1441
# Close all standard open file descriptors
1442
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1443
if not stat.S_ISCHR(os.fstat(null).st_mode):
1444
raise OSError(errno.ENODEV,
1445
u"%s not a character device"
1446
% os.path.devnull)
1447
os.dup2(null, sys.stdin.fileno())
1448
os.dup2(null, sys.stdout.fileno())
1449
os.dup2(null, sys.stderr.fileno())
1450
if null > 2:
1451
os.close(null)
1452
1453
1454
def main():
1455
1456
##################################################################
1457
# Parsing of options, both command line and config file
1458
1459
parser = optparse.OptionParser(version = "%%prog %s" % version)
1460
parser.add_option("-i", u"--interface", type=u"string",
1461
metavar="IF", help=u"Bind to interface IF")
1462
parser.add_option("-a", u"--address", type=u"string",
1463
help=u"Address to listen for requests on")
1464
parser.add_option("-p", u"--port", type=u"int",
1465
help=u"Port number to receive requests on")
1466
parser.add_option("--check", action=u"store_true",
1467
help=u"Run self-test")
1468
parser.add_option("--debug", action=u"store_true",
1469
help=u"Debug mode; run in foreground and log to"
1470
u" terminal")
1471
parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1472
u" priority string (see GnuTLS documentation)")
1473
parser.add_option("--servicename", type=u"string",
1474
metavar=u"NAME", help=u"Zeroconf service name")
1475
parser.add_option("--configdir", type=u"string",
1476
default=u"/etc/mandos", metavar=u"DIR",
1477
help=u"Directory to search for configuration"
1478
u" files")
1479
parser.add_option("--no-dbus", action=u"store_false",
1480
dest=u"use_dbus", help=u"Do not provide D-Bus"
1481
u" system bus interface")
1482
parser.add_option("--no-ipv6", action=u"store_false",
1483
dest=u"use_ipv6", help=u"Do not use IPv6")
1484
options = parser.parse_args()[0]
523
if "struct" not in sys.modules:
524
import struct
525
if "fcntl" not in sys.modules:
526
import fcntl
527
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
528
s = socket.socket()
529
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
530
struct.pack("16s16x", interface))
531
s.close()
532
interface_index = struct.unpack("I", ifreq[16:20])[0]
533
return interface_index
534
535
536
if __name__ == '__main__':
537
parser = OptionParser()
538
parser.add_option("-i", "--interface", type="string",
539
default=None, metavar="IF",
540
help="Bind to interface IF")
541
parser.add_option("--cert", type="string", default="cert.pem",
542
metavar="FILE",
543
help="Public key certificate PEM file to use")
544
parser.add_option("--key", type="string", default="key.pem",
545
metavar="FILE",
546
help="Private key PEM file to use")
547
parser.add_option("--ca", type="string", default="ca.pem",
548
metavar="FILE",
549
help="Certificate Authority certificate PEM file to use")
550
parser.add_option("--crl", type="string", default="crl.pem",
551
metavar="FILE",
552
help="Certificate Revokation List PEM file to use")
553
parser.add_option("-p", "--port", type="int", default=None,
554
help="Port number to receive requests on")
555
parser.add_option("--timeout", type="string", # Parsed later
556
default="1h",
557
help="Amount of downtime allowed for clients")
558
parser.add_option("--interval", type="string", # Parsed later
559
default="5m",
560
help="How often to check that a client is up")
561
parser.add_option("--check", action="store_true", default=False,
562
help="Run self-test")
563
parser.add_option("--debug", action="store_true", default=False,
564
help="Debug mode")
565
(options, args) = parser.parse_args()
1485
566
1486
567
if options.check:
1487
568
import doctest
1488
569
doctest.testmod()
1489
570
sys.exit()
1490
571
1491
# Default values for config file for server-global settings
1492
server_defaults = { u"interface": u"",
1493
u"address": u"",
1494
u"port": u"",
1495
u"debug": u"False",
1496
u"priority":
1497
u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1498
u"servicename": u"Mandos",
1499
u"use_dbus": u"True",
1500
u"use_ipv6": u"True",
1501
}
1502
1503
# Parse config file for server-global settings
1504
server_config = configparser.SafeConfigParser(server_defaults)
1505
del server_defaults
1506
server_config.read(os.path.join(options.configdir,
1507
u"mandos.conf"))
1508
# Convert the SafeConfigParser object to a dict
1509
server_settings = server_config.defaults()
1510
# Use the appropriate methods on the non-string config options
1511
for option in (u"debug", u"use_dbus", u"use_ipv6"):
1512
server_settings[option] = server_config.getboolean(u"DEFAULT",
1513
option)
1514
if server_settings["port"]:
1515
server_settings["port"] = server_config.getint(u"DEFAULT",
1516
u"port")
1517
del server_config
1518
1519
# Override the settings from the config file with command line
1520
# options, if set.
1521
for option in (u"interface", u"address", u"port", u"debug",
1522
u"priority", u"servicename", u"configdir",
1523
u"use_dbus", u"use_ipv6"):
1524
value = getattr(options, option)
1525
if value is not None:
1526
server_settings[option] = value
1527
del options
1528
# Force all strings to be unicode
1529
for option in server_settings.keys():
1530
if type(server_settings[option]) is str:
1531
server_settings[option] = unicode(server_settings[option])
1532
# Now we have our good server settings in "server_settings"
1533
1534
##################################################################
1535
1536
# For convenience
1537
debug = server_settings[u"debug"]
1538
use_dbus = server_settings[u"use_dbus"]
1539
use_ipv6 = server_settings[u"use_ipv6"]
1540
1541
if not debug:
1542
syslogger.setLevel(logging.WARNING)
1543
console.setLevel(logging.WARNING)
1544
1545
if server_settings[u"servicename"] != u"Mandos":
1546
syslogger.setFormatter(logging.Formatter
1547
(u'Mandos (%s) [%%(process)d]:'
1548
u' %%(levelname)s: %%(message)s'
1549
% server_settings[u"servicename"]))
1550
1551
# Parse config file with clients
1552
client_defaults = { u"timeout": u"1h",
1553
u"interval": u"5m",
1554
u"checker": u"fping -q -- %%(host)s",
1555
u"host": u"",
1556
}
1557
client_config = configparser.SafeConfigParser(client_defaults)
1558
client_config.read(os.path.join(server_settings[u"configdir"],
1559
u"clients.conf"))
1560
1561
global mandos_dbus_service
1562
mandos_dbus_service = None
1563
1564
tcp_server = MandosServer((server_settings[u"address"],
1565
server_settings[u"port"]),
1566
ClientHandler,
1567
interface=server_settings[u"interface"],
1568
use_ipv6=use_ipv6,
1569
gnutls_priority=
1570
server_settings[u"priority"],
1571
use_dbus=use_dbus)
1572
pidfilename = u"/var/run/mandos.pid"
1573
try:
1574
pidfile = open(pidfilename, u"w")
1575
except IOError:
1576
logger.error(u"Could not open file %r", pidfilename)
1577
1578
try:
1579
uid = pwd.getpwnam(u"_mandos").pw_uid
1580
gid = pwd.getpwnam(u"_mandos").pw_gid
1581
except KeyError:
1582
try:
1583
uid = pwd.getpwnam(u"mandos").pw_uid
1584
gid = pwd.getpwnam(u"mandos").pw_gid
1585
except KeyError:
1586
try:
1587
uid = pwd.getpwnam(u"nobody").pw_uid
1588
gid = pwd.getpwnam(u"nobody").pw_gid
1589
except KeyError:
1590
uid = 65534
1591
gid = 65534
1592
try:
1593
os.setgid(gid)
1594
os.setuid(uid)
1595
except OSError, error:
1596
if error[0] != errno.EPERM:
1597
raise error
1598
1599
# Enable all possible GnuTLS debugging
1600
if debug:
1601
# "Use a log level over 10 to enable all debugging options."
1602
# - GnuTLS manual
1603
gnutls.library.functions.gnutls_global_set_log_level(11)
1604
1605
@gnutls.library.types.gnutls_log_func
1606
def debug_gnutls(level, string):
1607
logger.debug(u"GnuTLS: %s", string[:-1])
1608
1609
(gnutls.library.functions
1610
.gnutls_global_set_log_function(debug_gnutls))
1611
1612
global main_loop
1613
# From the Avahi example code
572
# Parse the time arguments
573
try:
574
options.timeout = string_to_delta(options.timeout)
575
except ValueError:
576
parser.error("option --timeout: Unparseable time")
577
try:
578
options.interval = string_to_delta(options.interval)
579
except ValueError:
580
parser.error("option --interval: Unparseable time")
581
582
# Parse config file
583
defaults = { "checker": "sleep 1; fping -q -- %%(fqdn)s" }
584
client_config = ConfigParser.SafeConfigParser(defaults)
585
#client_config.readfp(open("secrets.conf"), "secrets.conf")
586
client_config.read("mandos-clients.conf")
587
588
# From the Avahi server example code
1614
589
DBusGMainLoop(set_as_default=True )
1615
590
main_loop = gobject.MainLoop()
1616
591
bus = dbus.SystemBus()
1617
# End of Avahi example code
1618
if use_dbus:
1619
try:
1620
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos",
1621
bus, do_not_queue=True)
1622
except dbus.exceptions.NameExistsException, e:
1623
logger.error(unicode(e) + u", disabling D-Bus")
1624
use_dbus = False
1625
server_settings[u"use_dbus"] = False
1626
tcp_server.use_dbus = False
1627
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1628
service = AvahiService(name = server_settings[u"servicename"],
1629
servicetype = u"_mandos._tcp",
1630
protocol = protocol, bus = bus)
1631
if server_settings["interface"]:
1632
service.interface = (if_nametoindex
1633
(str(server_settings[u"interface"])))
1634
1635
client_class = Client
1636
if use_dbus:
1637
client_class = functools.partial(ClientDBus, bus = bus)
1638
tcp_server.clients.update(set(
1639
client_class(name = section,
1640
config= dict(client_config.items(section)))
1641
for section in client_config.sections()))
1642
if not tcp_server.clients:
1643
logger.warning(u"No clients defined")
1644
1645
if debug:
1646
# Redirect stdin so all checkers get /dev/null
1647
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1648
os.dup2(null, sys.stdin.fileno())
1649
if null > 2:
1650
os.close(null)
1651
else:
1652
# No console logging
1653
logger.removeHandler(console)
1654
# Close all input and output, do double fork, etc.
1655
daemon()
1656
1657
try:
1658
with pidfile:
1659
pid = os.getpid()
1660
pidfile.write(str(pid) + "\n")
1661
del pidfile
1662
except IOError:
1663
logger.error(u"Could not write to file %r with PID %d",
1664
pidfilename, pid)
1665
except NameError:
1666
# "pidfile" was never created
1667
pass
1668
del pidfilename
1669
1670
if not debug:
1671
signal.signal(signal.SIGINT, signal.SIG_IGN)
1672
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1673
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1674
1675
if use_dbus:
1676
class MandosDBusService(dbus.service.Object):
1677
"""A D-Bus proxy object"""
1678
def __init__(self):
1679
dbus.service.Object.__init__(self, bus, u"/")
1680
_interface = u"se.bsnet.fukt.Mandos"
1681
1682
@dbus.service.signal(_interface, signature=u"o")
1683
def ClientAdded(self, objpath):
1684
"D-Bus signal"
1685
pass
1686
1687
@dbus.service.signal(_interface, signature=u"ss")
1688
def ClientNotFound(self, fingerprint, address):
1689
"D-Bus signal"
1690
pass
1691
1692
@dbus.service.signal(_interface, signature=u"os")
1693
def ClientRemoved(self, objpath, name):
1694
"D-Bus signal"
1695
pass
1696
1697
@dbus.service.method(_interface, out_signature=u"ao")
1698
def GetAllClients(self):
1699
"D-Bus method"
1700
return dbus.Array(c.dbus_object_path
1701
for c in tcp_server.clients)
1702
1703
@dbus.service.method(_interface,
1704
out_signature=u"a{oa{sv}}")
1705
def GetAllClientsWithProperties(self):
1706
"D-Bus method"
1707
return dbus.Dictionary(
1708
((c.dbus_object_path, c.GetAll(u""))
1709
for c in tcp_server.clients),
1710
signature=u"oa{sv}")
1711
1712
@dbus.service.method(_interface, in_signature=u"o")
1713
def RemoveClient(self, object_path):
1714
"D-Bus method"
1715
for c in tcp_server.clients:
1716
if c.dbus_object_path == object_path:
1717
tcp_server.clients.remove(c)
1718
c.remove_from_connection()
1719
# Don't signal anything except ClientRemoved
1720
c.disable(quiet=True)
1721
# Emit D-Bus signal
1722
self.ClientRemoved(object_path, c.name)
1723
return
1724
raise KeyError(object_path)
1725
1726
del _interface
1727
1728
mandos_dbus_service = MandosDBusService()
1729
1730
def cleanup():
1731
"Cleanup function; run on exit"
1732
service.cleanup()
1733
1734
while tcp_server.clients:
1735
client = tcp_server.clients.pop()
1736
if use_dbus:
1737
client.remove_from_connection()
1738
client.disable_hook = None
1739
# Don't signal anything except ClientRemoved
1740
client.disable(quiet=True)
1741
if use_dbus:
1742
# Emit D-Bus signal
1743
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
1744
client.name)
1745
1746
atexit.register(cleanup)
1747
1748
for client in tcp_server.clients:
1749
if use_dbus:
1750
# Emit D-Bus signal
1751
mandos_dbus_service.ClientAdded(client.dbus_object_path)
1752
client.enable()
1753
1754
tcp_server.enable()
1755
tcp_server.server_activate()
1756
1757
# Find out what port we got
1758
service.port = tcp_server.socket.getsockname()[1]
1759
if use_ipv6:
1760
logger.info(u"Now listening on address %r, port %d,"
1761
" flowinfo %d, scope_id %d"
1762
% tcp_server.socket.getsockname())
1763
else: # IPv4
1764
logger.info(u"Now listening on address %r, port %d"
1765
% tcp_server.socket.getsockname())
1766
1767
#service.interface = tcp_server.socket.getsockname()[3]
1768
1769
try:
1770
# From the Avahi example code
1771
try:
1772
service.activate()
1773
except dbus.exceptions.DBusException, error:
1774
logger.critical(u"DBusException: %s", error)
1775
cleanup()
1776
sys.exit(1)
1777
# End of Avahi example code
1778
1779
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
1780
lambda *args, **kwargs:
1781
(tcp_server.handle_request
1782
(*args[2:], **kwargs) or True))
1783
1784
logger.debug(u"Starting main loop")
592
server = dbus.Interface(
593
bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
594
avahi.DBUS_INTERFACE_SERVER )
595
# End of Avahi example code
596
597
debug = options.debug
598
599
clients = Set()
600
def remove_from_clients(client):
601
clients.remove(client)
602
if not clients:
603
logger.debug(u"No clients left, exiting")
604
main_loop.quit()
605
606
clients.update(Set(Client(name=section, options=options,
607
stop_hook = remove_from_clients,
608
**(dict(client_config\
609
.items(section))))
610
for section in client_config.sections()))
611
for client in clients:
612
client.start()
613
614
tcp_server = IPv6_TCPServer((None, options.port),
615
tcp_handler,
616
options=options,
617
clients=clients)
618
# Find out what random port we got
619
servicePort = tcp_server.socket.getsockname()[1]
620
logger.debug(u"Now listening on port %d", servicePort)
621
622
if options.interface is not None:
623
serviceInterface = if_nametoindex(options.interface)
624
625
# From the Avahi server example code
626
server.connect_to_signal("StateChanged", server_state_changed)
627
server_state_changed(server.GetState())
628
# End of Avahi example code
629
630
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
631
lambda *args, **kwargs:
632
tcp_server.handle_request(*args[2:],
633
**kwargs) or True)
634
try:
1785
635
main_loop.run()
1786
except AvahiError, error:
1787
logger.critical(u"AvahiError: %s", error)
1788
cleanup()
1789
sys.exit(1)
1790
636
except KeyboardInterrupt:
1791
if debug:
1792
print >> sys.stderr
1793
logger.debug(u"Server received KeyboardInterrupt")
1794
logger.debug(u"Server exiting")
1795
# Must run before the D-Bus bus name gets deregistered
1796
cleanup()
637
print
638
639
# Cleanup here
1797
640
1798
if __name__ == '__main__':
1799
main()
641
# From the Avahi server example code
642
if not group is None:
643
group.Free()
644
# End of Avahi example code
645
646
for client in clients:
647
client.stop_hook = None
648
client.stop()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0