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 45
- compare with another revision
- download diff
- download tarball
- view history from revision 45
- Committer: Teddy Hogeborn
- Date: 2008-08-04 21:25:55 UTC
- Revision ID: teddy@fukt.bsnet.se-20080804212555-rm7xxjze65f8avy3
* server.py: Cosmetic changes.
- files removed:
- .bzr-builddeb
- debian
- debian/po
- files renamed:
- plugin-runner.c => plugbasedclient.c
- plugins.d/mandos-client.c => plugins.d/mandosclient.c
- plugins.d/password-prompt.c => plugins.d/passprompt.c
- mandos.conf => server.conf
- mandos => server.py
- files modified:
- Makefile
added
removed
server.py
6
6
# This program is partly derived from an example program for an Avahi
7
7
# service publisher, downloaded from
8
8
# <http://avahi.org/wiki/PythonPublishExample>. This includes the
9
# methods "add", "remove", "server_state_changed",
10
# "entry_group_state_changed", "cleanup", and "activate" in the
11
# "AvahiService" class, and some lines in "main".
9
# following functions: "AvahiService.add", "AvahiService.remove",
10
# "server_state_changed", "entry_group_state_changed", and some lines
11
# in "main".
12
12
#
13
13
# Everything else is
14
# Copyright © 2008,2009 Teddy Hogeborn
15
# Copyright © 2008,2009 Björn Påhlsson
14
# Copyright © 2007-2008 Teddy Hogeborn & Björn Påhlsson
16
15
#
17
16
# This program is free software: you can redistribute it and/or modify
18
17
# it under the terms of the GNU General Public License as published by
25
24
# GNU General Public License for more details.
26
25
#
27
26
# 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/>.
27
# along with this program. If not, see <http://www.gnu.org/licenses/>.
30
28
#
31
29
# Contact the authors at <mandos@fukt.bsnet.se>.
32
30
#
33
31
34
from __future__ import division, with_statement, absolute_import
32
from __future__ import division
35
33
36
import SocketServer as socketserver
34
import SocketServer
37
35
import socket
38
import optparse
36
import select
37
from optparse import OptionParser
39
38
import datetime
40
39
import errno
41
40
import gnutls.crypto
44
43
import gnutls.library.functions
45
44
import gnutls.library.constants
46
45
import gnutls.library.types
47
import ConfigParser as configparser
46
import ConfigParser
48
47
import sys
49
48
import re
50
49
import os
51
50
import signal
51
from sets import Set
52
52
import subprocess
53
53
import atexit
54
54
import stat
55
55
import logging
56
56
import logging.handlers
57
import pwd
58
from contextlib import closing
59
import struct
60
import fcntl
61
import functools
62
57
63
58
import dbus
64
import dbus.service
65
59
import gobject
66
60
import avahi
67
61
from dbus.mainloop.glib import DBusGMainLoop
68
62
import ctypes
69
import ctypes.util
70
import xml.dom.minidom
71
import inspect
72
73
try:
74
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
75
except AttributeError:
76
try:
77
from IN import SO_BINDTODEVICE
78
except ImportError:
79
SO_BINDTODEVICE = None
80
81
82
version = "1.0.14"
83
84
logger = logging.Logger(u'mandos')
85
syslogger = (logging.handlers.SysLogHandler
86
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
87
address = "/dev/log"))
88
syslogger.setFormatter(logging.Formatter
89
(u'Mandos [%(process)d]: %(levelname)s:'
90
u' %(message)s'))
63
64
# Brief description of the operation of this program:
65
#
66
# This server announces itself as a Zeroconf service. Connecting
67
# clients use the TLS protocol, with the unusual quirk that this
68
# server program acts as a TLS "client" while a connecting client acts
69
# as a TLS "server". The client (acting as a TLS "server") must
70
# supply an OpenPGP certificate, and the fingerprint of this
71
# certificate is used by this server to look up (in a list read from a
72
# file at start time) which binary blob to give the client. No other
73
# authentication or authorization is done by this server.
74
75
76
logger = logging.Logger('mandos')
77
syslogger = logging.handlers.SysLogHandler\
78
(facility = logging.handlers.SysLogHandler.LOG_DAEMON)
79
syslogger.setFormatter(logging.Formatter\
80
('%(levelname)s: %(message)s'))
91
81
logger.addHandler(syslogger)
82
del syslogger
92
83
93
console = logging.StreamHandler()
94
console.setFormatter(logging.Formatter(u'%(name)s [%(process)d]:'
95
u' %(levelname)s:'
96
u' %(message)s'))
97
logger.addHandler(console)
98
84
99
85
class AvahiError(Exception):
100
def __init__(self, value, *args, **kwargs):
86
def __init__(self, value):
101
87
self.value = value
102
super(AvahiError, self).__init__(value, *args, **kwargs)
103
def __unicode__(self):
104
return unicode(repr(self.value))
88
def __str__(self):
89
return repr(self.value)
105
90
106
91
class AvahiServiceError(AvahiError):
107
92
pass
112
97
113
98
class AvahiService(object):
114
99
"""An Avahi (Zeroconf) service.
115
116
100
Attributes:
117
101
interface: integer; avahi.IF_UNSPEC or an interface index.
118
102
Used to optionally bind to the specified interface.
119
name: string; Example: u'Mandos'
120
type: string; Example: u'_mandos._tcp'.
103
name: string; Example: 'Mandos'
104
type: string; Example: '_mandos._tcp'.
121
105
See <http://www.dns-sd.org/ServiceTypes.html>
122
106
port: integer; what port to announce
123
107
TXT: list of strings; TXT record for the service
126
110
max_renames: integer; maximum number of renames
127
111
rename_count: integer; counter so we only rename after collisions
128
112
a sensible number of times
129
group: D-Bus Entry Group
130
server: D-Bus Server
131
bus: dbus.SystemBus()
132
113
"""
133
114
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
134
servicetype = None, port = None, TXT = None,
135
domain = u"", host = u"", max_renames = 32768,
136
protocol = avahi.PROTO_UNSPEC, bus = None):
115
type = None, port = None, TXT = None, domain = "",
116
host = "", max_renames = 12):
137
117
self.interface = interface
138
118
self.name = name
139
self.type = servicetype
119
self.type = type
140
120
self.port = port
141
self.TXT = TXT if TXT is not None else []
121
if TXT is None:
122
self.TXT = []
123
else:
124
self.TXT = TXT
142
125
self.domain = domain
143
126
self.host = host
144
127
self.rename_count = 0
145
self.max_renames = max_renames
146
self.protocol = protocol
147
self.group = None # our entry group
148
self.server = None
149
self.bus = bus
150
128
def rename(self):
151
129
"""Derived from the Avahi example code"""
152
130
if self.rename_count >= self.max_renames:
153
logger.critical(u"No suitable Zeroconf service name found"
154
u" after %i retries, exiting.",
155
self.rename_count)
156
raise AvahiServiceError(u"Too many renames")
157
self.name = self.server.GetAlternativeServiceName(self.name)
158
logger.info(u"Changing Zeroconf service name to %r ...",
159
unicode(self.name))
160
syslogger.setFormatter(logging.Formatter
161
(u'Mandos (%s) [%%(process)d]:'
162
u' %%(levelname)s: %%(message)s'
163
% self.name))
131
logger.critical(u"No suitable service name found after %i"
132
u" retries, exiting.", rename_count)
133
raise AvahiServiceError("Too many renames")
134
name = server.GetAlternativeServiceName(name)
135
logger.error(u"Changing name to %r ...", name)
164
136
self.remove()
165
137
self.add()
166
138
self.rename_count += 1
167
139
def remove(self):
168
140
"""Derived from the Avahi example code"""
169
if self.group is not None:
170
self.group.Reset()
141
if group is not None:
142
group.Reset()
171
143
def add(self):
172
144
"""Derived from the Avahi example code"""
173
if self.group is None:
174
self.group = dbus.Interface(
175
self.bus.get_object(avahi.DBUS_NAME,
176
self.server.EntryGroupNew()),
177
avahi.DBUS_INTERFACE_ENTRY_GROUP)
178
self.group.connect_to_signal('StateChanged',
179
self
180
.entry_group_state_changed)
181
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
182
self.name, self.type)
183
self.group.AddService(
184
self.interface,
185
self.protocol,
186
dbus.UInt32(0), # flags
187
self.name, self.type,
188
self.domain, self.host,
189
dbus.UInt16(self.port),
190
avahi.string_array_to_txt_array(self.TXT))
191
self.group.Commit()
192
def entry_group_state_changed(self, state, error):
193
"""Derived from the Avahi example code"""
194
logger.debug(u"Avahi state change: %i", state)
195
196
if state == avahi.ENTRY_GROUP_ESTABLISHED:
197
logger.debug(u"Zeroconf service established.")
198
elif state == avahi.ENTRY_GROUP_COLLISION:
199
logger.warning(u"Zeroconf service name collision.")
200
self.rename()
201
elif state == avahi.ENTRY_GROUP_FAILURE:
202
logger.critical(u"Avahi: Error in group state changed %s",
203
unicode(error))
204
raise AvahiGroupError(u"State changed: %s"
205
% unicode(error))
206
def cleanup(self):
207
"""Derived from the Avahi example code"""
208
if self.group is not None:
209
self.group.Free()
210
self.group = None
211
def server_state_changed(self, state):
212
"""Derived from the Avahi example code"""
213
if state == avahi.SERVER_COLLISION:
214
logger.error(u"Zeroconf server name collision")
215
self.remove()
216
elif state == avahi.SERVER_RUNNING:
217
self.add()
218
def activate(self):
219
"""Derived from the Avahi example code"""
220
if self.server is None:
221
self.server = dbus.Interface(
222
self.bus.get_object(avahi.DBUS_NAME,
223
avahi.DBUS_PATH_SERVER),
224
avahi.DBUS_INTERFACE_SERVER)
225
self.server.connect_to_signal(u"StateChanged",
226
self.server_state_changed)
227
self.server_state_changed(self.server.GetState())
145
global group
146
if group is None:
147
group = dbus.Interface\
148
(bus.get_object(avahi.DBUS_NAME,
149
server.EntryGroupNew()),
150
avahi.DBUS_INTERFACE_ENTRY_GROUP)
151
group.connect_to_signal('StateChanged',
152
entry_group_state_changed)
153
logger.debug(u"Adding service '%s' of type '%s' ...",
154
service.name, service.type)
155
group.AddService(
156
self.interface, # interface
157
avahi.PROTO_INET6, # protocol
158
dbus.UInt32(0), # flags
159
self.name, self.type,
160
self.domain, self.host,
161
dbus.UInt16(self.port),
162
avahi.string_array_to_txt_array(self.TXT))
163
group.Commit()
164
165
# From the Avahi example code:
166
group = None # our entry group
167
# End of Avahi example code
228
168
229
169
230
170
class Client(object):
231
171
"""A representation of a client host served by this server.
232
233
172
Attributes:
234
name: string; from the config file, used in log messages and
235
D-Bus identifiers
173
name: string; from the config file, used in log messages
236
174
fingerprint: string (40 or 32 hexadecimal digits); used to
237
175
uniquely identify the client
238
secret: bytestring; sent verbatim (over TLS) to client
239
host: string; available for use by the checker command
240
created: datetime.datetime(); (UTC) object creation
241
last_enabled: datetime.datetime(); (UTC)
242
enabled: bool()
243
last_checked_ok: datetime.datetime(); (UTC) or None
244
timeout: datetime.timedelta(); How long from last_checked_ok
245
until this client is invalid
246
interval: datetime.timedelta(); How often to start a new checker
247
disable_hook: If set, called by disable() as disable_hook(self)
248
checker: subprocess.Popen(); a running checker process used
249
to see if the client lives.
250
'None' if no process is running.
176
secret: bytestring; sent verbatim (over TLS) to client
177
fqdn: string (FQDN); available for use by the checker command
178
created: datetime.datetime(); object creation, not client host
179
last_checked_ok: datetime.datetime() or None if not yet checked OK
180
timeout: datetime.timedelta(); How long from last_checked_ok
181
until this client is invalid
182
interval: datetime.timedelta(); How often to start a new checker
183
stop_hook: If set, called by stop() as stop_hook(self)
184
checker: subprocess.Popen(); a running checker process used
185
to see if the client lives.
186
'None' if no process is running.
251
187
checker_initiator_tag: a gobject event source tag, or None
252
disable_initiator_tag: - '' -
188
stop_initiator_tag: - '' -
253
189
checker_callback_tag: - '' -
254
190
checker_command: string; External command which is run to check if
255
191
client lives. %() expansions are done at
256
192
runtime with vars(self) as dict, so that for
257
193
instance %(name)s can be used in the command.
258
current_checker_command: string; current running checker_command
194
Private attibutes:
195
_timeout: Real variable for 'timeout'
196
_interval: Real variable for 'interval'
197
_timeout_milliseconds: Used when calling gobject.timeout_add()
198
_interval_milliseconds: - '' -
259
199
"""
260
261
@staticmethod
262
def _timedelta_to_milliseconds(td):
263
"Convert a datetime.timedelta() to milliseconds"
264
return ((td.days * 24 * 60 * 60 * 1000)
265
+ (td.seconds * 1000)
266
+ (td.microseconds // 1000))
267
268
def timeout_milliseconds(self):
269
"Return the 'timeout' attribute in milliseconds"
270
return self._timedelta_to_milliseconds(self.timeout)
271
272
def interval_milliseconds(self):
273
"Return the 'interval' attribute in milliseconds"
274
return self._timedelta_to_milliseconds(self.interval)
275
276
def __init__(self, name = None, disable_hook=None, config=None):
200
def _set_timeout(self, timeout):
201
"Setter function for 'timeout' attribute"
202
self._timeout = timeout
203
self._timeout_milliseconds = ((self.timeout.days
204
* 24 * 60 * 60 * 1000)
205
+ (self.timeout.seconds * 1000)
206
+ (self.timeout.microseconds
207
// 1000))
208
timeout = property(lambda self: self._timeout,
209
_set_timeout)
210
del _set_timeout
211
def _set_interval(self, interval):
212
"Setter function for 'interval' attribute"
213
self._interval = interval
214
self._interval_milliseconds = ((self.interval.days
215
* 24 * 60 * 60 * 1000)
216
+ (self.interval.seconds
217
* 1000)
218
+ (self.interval.microseconds
219
// 1000))
220
interval = property(lambda self: self._interval,
221
_set_interval)
222
del _set_interval
223
def __init__(self, name = None, stop_hook=None, config={}):
277
224
"""Note: the 'checker' key in 'config' sets the
278
225
'checker_command' attribute and *not* the 'checker'
279
226
attribute."""
280
227
self.name = name
281
if config is None:
282
config = {}
283
228
logger.debug(u"Creating client %r", self.name)
284
229
# Uppercase and remove spaces from fingerprint for later
285
230
# comparison purposes with return value from the fingerprint()
286
231
# function
287
self.fingerprint = (config[u"fingerprint"].upper()
288
.replace(u" ", u""))
232
self.fingerprint = config["fingerprint"].upper()\
233
.replace(u" ", u"")
289
234
logger.debug(u" Fingerprint: %s", self.fingerprint)
290
if u"secret" in config:
291
self.secret = config[u"secret"].decode(u"base64")
292
elif u"secfile" in config:
293
with closing(open(os.path.expanduser
294
(os.path.expandvars
295
(config[u"secfile"])),
296
"rb")) as secfile:
297
self.secret = secfile.read()
235
if "secret" in config:
236
self.secret = config["secret"].decode(u"base64")
237
elif "secfile" in config:
238
sf = open(config["secfile"])
239
self.secret = sf.read()
240
sf.close()
298
241
else:
299
242
raise TypeError(u"No secret or secfile for client %s"
300
243
% self.name)
301
self.host = config.get(u"host", u"")
302
self.created = datetime.datetime.utcnow()
303
self.enabled = False
304
self.last_enabled = None
244
self.fqdn = config.get("fqdn", "")
245
self.created = datetime.datetime.now()
305
246
self.last_checked_ok = None
306
self.timeout = string_to_delta(config[u"timeout"])
307
self.interval = string_to_delta(config[u"interval"])
308
self.disable_hook = disable_hook
247
self.timeout = string_to_delta(config["timeout"])
248
self.interval = string_to_delta(config["interval"])
249
self.stop_hook = stop_hook
309
250
self.checker = None
310
251
self.checker_initiator_tag = None
311
self.disable_initiator_tag = None
252
self.stop_initiator_tag = None
312
253
self.checker_callback_tag = None
313
self.checker_command = config[u"checker"]
314
self.current_checker_command = None
315
self.last_connect = None
316
317
def enable(self):
254
self.check_command = config["checker"]
255
def start(self):
318
256
"""Start this client's checker and timeout hooks"""
319
if getattr(self, u"enabled", False):
320
# Already enabled
321
return
322
self.last_enabled = datetime.datetime.utcnow()
323
257
# Schedule a new checker to be started an 'interval' from now,
324
258
# and every interval from then on.
325
self.checker_initiator_tag = (gobject.timeout_add
326
(self.interval_milliseconds(),
327
self.start_checker))
328
# Schedule a disable() when 'timeout' has passed
329
self.disable_initiator_tag = (gobject.timeout_add
330
(self.timeout_milliseconds(),
331
self.disable))
332
self.enabled = True
259
self.checker_initiator_tag = gobject.timeout_add\
260
(self._interval_milliseconds,
261
self.start_checker)
333
262
# Also start a new checker *right now*.
334
263
self.start_checker()
335
336
def disable(self, quiet=True):
337
"""Disable this client."""
338
if not getattr(self, "enabled", False):
264
# Schedule a stop() when 'timeout' has passed
265
self.stop_initiator_tag = gobject.timeout_add\
266
(self._timeout_milliseconds,
267
self.stop)
268
def stop(self):
269
"""Stop this client.
270
The possibility that a client might be restarted is left open,
271
but not currently used."""
272
# If this client doesn't have a secret, it is already stopped.
273
if self.secret:
274
logger.info(u"Stopping client %s", self.name)
275
self.secret = None
276
else:
339
277
return False
340
if not quiet:
341
logger.info(u"Disabling client %s", self.name)
342
if getattr(self, u"disable_initiator_tag", False):
343
gobject.source_remove(self.disable_initiator_tag)
344
self.disable_initiator_tag = None
345
if getattr(self, u"checker_initiator_tag", False):
278
if getattr(self, "stop_initiator_tag", False):
279
gobject.source_remove(self.stop_initiator_tag)
280
self.stop_initiator_tag = None
281
if getattr(self, "checker_initiator_tag", False):
346
282
gobject.source_remove(self.checker_initiator_tag)
347
283
self.checker_initiator_tag = None
348
284
self.stop_checker()
349
if self.disable_hook:
350
self.disable_hook(self)
351
self.enabled = False
285
if self.stop_hook:
286
self.stop_hook(self)
352
287
# Do not run this again if called by a gobject.timeout_add
353
288
return False
354
355
289
def __del__(self):
356
self.disable_hook = None
357
self.disable()
358
359
def checker_callback(self, pid, condition, command):
290
self.stop_hook = None
291
self.stop()
292
def checker_callback(self, pid, condition):
360
293
"""The checker has completed, so take appropriate actions."""
294
now = datetime.datetime.now()
361
295
self.checker_callback_tag = None
362
296
self.checker = None
363
if os.WIFEXITED(condition):
364
exitstatus = os.WEXITSTATUS(condition)
365
if exitstatus == 0:
366
logger.info(u"Checker for %(name)s succeeded",
367
vars(self))
368
self.checked_ok()
369
else:
370
logger.info(u"Checker for %(name)s failed",
371
vars(self))
372
else:
297
if os.WIFEXITED(condition) \
298
and (os.WEXITSTATUS(condition) == 0):
299
logger.info(u"Checker for %(name)s succeeded",
300
vars(self))
301
self.last_checked_ok = now
302
gobject.source_remove(self.stop_initiator_tag)
303
self.stop_initiator_tag = gobject.timeout_add\
304
(self._timeout_milliseconds,
305
self.stop)
306
elif not os.WIFEXITED(condition):
373
307
logger.warning(u"Checker for %(name)s crashed?",
374
308
vars(self))
375
376
def checked_ok(self):
377
"""Bump up the timeout for this client.
378
379
This should only be called when the client has been seen,
380
alive and well.
381
"""
382
self.last_checked_ok = datetime.datetime.utcnow()
383
gobject.source_remove(self.disable_initiator_tag)
384
self.disable_initiator_tag = (gobject.timeout_add
385
(self.timeout_milliseconds(),
386
self.disable))
387
309
else:
310
logger.info(u"Checker for %(name)s failed",
311
vars(self))
388
312
def start_checker(self):
389
313
"""Start a new checker subprocess if one is not running.
390
391
314
If a checker already exists, leave it running and do
392
315
nothing."""
393
316
# The reason for not killing a running checker is that if we
398
321
# checkers alone, the checker would have to take more time
399
322
# than 'timeout' for the client to be declared invalid, which
400
323
# is as it should be.
401
402
# If a checker exists, make sure it is not a zombie
403
try:
404
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
405
except (AttributeError, OSError), error:
406
if (isinstance(error, OSError)
407
and error.errno != errno.ECHILD):
408
raise error
409
else:
410
if pid:
411
logger.warning(u"Checker was a zombie")
412
gobject.source_remove(self.checker_callback_tag)
413
self.checker_callback(pid, status,
414
self.current_checker_command)
415
# Start a new checker if needed
416
324
if self.checker is None:
417
325
try:
418
# In case checker_command has exactly one % operator
419
command = self.checker_command % self.host
326
# In case check_command has exactly one % operator
327
command = self.check_command % self.fqdn
420
328
except TypeError:
421
329
# Escape attributes for the shell
422
escaped_attrs = dict((key,
423
re.escape(unicode(str(val),
424
errors=
425
u'replace')))
330
escaped_attrs = dict((key, re.escape(str(val)))
426
331
for key, val in
427
332
vars(self).iteritems())
428
333
try:
429
command = self.checker_command % escaped_attrs
334
command = self.check_command % escaped_attrs
430
335
except TypeError, error:
431
336
logger.error(u'Could not format string "%s":'
432
u' %s', self.checker_command, error)
337
u' %s', self.check_command, error)
433
338
return True # Try again later
434
self.current_checker_command = command
435
339
try:
436
340
logger.info(u"Starting checker %r for %s",
437
341
command, self.name)
438
# We don't need to redirect stdout and stderr, since
439
# in normal mode, that is already done by daemon(),
440
# and in debug mode we don't want to. (Stdin is
441
# always replaced by /dev/null.)
442
342
self.checker = subprocess.Popen(command,
443
343
close_fds=True,
444
shell=True, cwd=u"/")
445
self.checker_callback_tag = (gobject.child_watch_add
446
(self.checker.pid,
447
self.checker_callback,
448
data=command))
449
# The checker may have completed before the gobject
450
# watch was added. Check for this.
451
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
452
if pid:
453
gobject.source_remove(self.checker_callback_tag)
454
self.checker_callback(pid, status, command)
455
except OSError, error:
344
shell=True, cwd="/")
345
self.checker_callback_tag = gobject.child_watch_add\
346
(self.checker.pid,
347
self.checker_callback)
348
except subprocess.OSError, error:
456
349
logger.error(u"Failed to start subprocess: %s",
457
350
error)
458
351
# Re-run this periodically if run by gobject.timeout_add
459
352
return True
460
461
353
def stop_checker(self):
462
354
"""Force the checker process, if any, to stop."""
463
355
if self.checker_callback_tag:
464
356
gobject.source_remove(self.checker_callback_tag)
465
357
self.checker_callback_tag = None
466
if getattr(self, u"checker", None) is None:
358
if getattr(self, "checker", None) is None:
467
359
return
468
logger.debug(u"Stopping checker for %(name)s", vars(self))
360
logger.debug("Stopping checker for %(name)s", vars(self))
469
361
try:
470
362
os.kill(self.checker.pid, signal.SIGTERM)
471
#time.sleep(0.5)
363
#os.sleep(0.5)
472
364
#if self.checker.poll() is None:
473
365
# os.kill(self.checker.pid, signal.SIGKILL)
474
366
except OSError, error:
475
367
if error.errno != errno.ESRCH: # No such process
476
368
raise
477
369
self.checker = None
478
479
370
def still_valid(self):
480
371
"""Has the timeout not yet passed for this client?"""
481
if not getattr(self, u"enabled", False):
482
return False
483
now = datetime.datetime.utcnow()
372
now = datetime.datetime.now()
484
373
if self.last_checked_ok is None:
485
374
return now < (self.created + self.timeout)
486
375
else:
487
376
return now < (self.last_checked_ok + self.timeout)
488
377
489
378
490
def dbus_service_property(dbus_interface, signature=u"v",
491
access=u"readwrite", byte_arrays=False):
492
"""Decorators for marking methods of a DBusObjectWithProperties to
493
become properties on the D-Bus.
494
495
The decorated method will be called with no arguments by "Get"
496
and with one argument by "Set".
497
498
The parameters, where they are supported, are the same as
499
dbus.service.method, except there is only "signature", since the
500
type from Get() and the type sent to Set() is the same.
501
"""
502
def decorator(func):
503
func._dbus_is_property = True
504
func._dbus_interface = dbus_interface
505
func._dbus_signature = signature
506
func._dbus_access = access
507
func._dbus_name = func.__name__
508
if func._dbus_name.endswith(u"_dbus_property"):
509
func._dbus_name = func._dbus_name[:-14]
510
func._dbus_get_args_options = {u'byte_arrays': byte_arrays }
511
return func
512
return decorator
513
514
515
class DBusPropertyException(dbus.exceptions.DBusException):
516
"""A base class for D-Bus property-related exceptions
517
"""
518
def __unicode__(self):
519
return unicode(str(self))
520
521
522
class DBusPropertyAccessException(DBusPropertyException):
523
"""A property's access permissions disallows an operation.
524
"""
525
pass
526
527
528
class DBusPropertyNotFound(DBusPropertyException):
529
"""An attempt was made to access a non-existing property.
530
"""
531
pass
532
533
534
class DBusObjectWithProperties(dbus.service.Object):
535
"""A D-Bus object with properties.
536
537
Classes inheriting from this can use the dbus_service_property
538
decorator to expose methods as D-Bus properties. It exposes the
539
standard Get(), Set(), and GetAll() methods on the D-Bus.
540
"""
541
542
@staticmethod
543
def _is_dbus_property(obj):
544
return getattr(obj, u"_dbus_is_property", False)
545
546
def _get_all_dbus_properties(self):
547
"""Returns a generator of (name, attribute) pairs
548
"""
549
return ((prop._dbus_name, prop)
550
for name, prop in
551
inspect.getmembers(self, self._is_dbus_property))
552
553
def _get_dbus_property(self, interface_name, property_name):
554
"""Returns a bound method if one exists which is a D-Bus
555
property with the specified name and interface.
556
"""
557
for name in (property_name,
558
property_name + u"_dbus_property"):
559
prop = getattr(self, name, None)
560
if (prop is None
561
or not self._is_dbus_property(prop)
562
or prop._dbus_name != property_name
563
or (interface_name and prop._dbus_interface
564
and interface_name != prop._dbus_interface)):
565
continue
566
return prop
567
# No such property
568
raise DBusPropertyNotFound(self.dbus_object_path + u":"
569
+ interface_name + u"."
570
+ property_name)
571
572
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ss",
573
out_signature=u"v")
574
def Get(self, interface_name, property_name):
575
"""Standard D-Bus property Get() method, see D-Bus standard.
576
"""
577
prop = self._get_dbus_property(interface_name, property_name)
578
if prop._dbus_access == u"write":
579
raise DBusPropertyAccessException(property_name)
580
value = prop()
581
if not hasattr(value, u"variant_level"):
582
return value
583
return type(value)(value, variant_level=value.variant_level+1)
584
585
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ssv")
586
def Set(self, interface_name, property_name, value):
587
"""Standard D-Bus property Set() method, see D-Bus standard.
588
"""
589
prop = self._get_dbus_property(interface_name, property_name)
590
if prop._dbus_access == u"read":
591
raise DBusPropertyAccessException(property_name)
592
if prop._dbus_get_args_options[u"byte_arrays"]:
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):
729
self.checker_callback_tag = None
730
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
785
_interface = u"se.bsnet.fukt.Mandos.Client"
786
787
# CheckedOK - method
788
@dbus.service.method(_interface)
789
def CheckedOK(self):
790
return self.checked_ok()
791
792
# CheckerCompleted - signal
793
@dbus.service.signal(_interface, signature=u"nxs")
794
def CheckerCompleted(self, exitcode, waitstatus, command):
795
"D-Bus signal"
796
pass
797
798
# CheckerStarted - signal
799
@dbus.service.signal(_interface, signature=u"s")
800
def CheckerStarted(self, command):
801
"D-Bus signal"
802
pass
803
804
# PropertyChanged - signal
805
@dbus.service.signal(_interface, signature=u"sv")
806
def PropertyChanged(self, property, value):
807
"D-Bus signal"
808
pass
809
810
# GotSecret - signal
811
@dbus.service.signal(_interface)
812
def GotSecret(self):
813
"D-Bus signal"
814
pass
815
816
# Rejected - signal
817
@dbus.service.signal(_interface)
818
def Rejected(self):
819
"D-Bus signal"
820
pass
821
822
# Enable - method
823
@dbus.service.method(_interface)
824
def Enable(self):
825
"D-Bus method"
826
self.enable()
827
828
# StartChecker - method
829
@dbus.service.method(_interface)
830
def StartChecker(self):
831
"D-Bus method"
832
self.start_checker()
833
834
# Disable - method
835
@dbus.service.method(_interface)
836
def Disable(self):
837
"D-Bus method"
838
self.disable()
839
840
# StopChecker - method
841
@dbus.service.method(_interface)
842
def StopChecker(self):
843
self.stop_checker()
844
845
# name - property
846
@dbus_service_property(_interface, signature=u"s", access=u"read")
847
def name_dbus_property(self):
848
return dbus.String(self.name)
849
850
# fingerprint - property
851
@dbus_service_property(_interface, signature=u"s", access=u"read")
852
def fingerprint_dbus_property(self):
853
return dbus.String(self.fingerprint)
854
855
# host - property
856
@dbus_service_property(_interface, signature=u"s",
857
access=u"readwrite")
858
def host_dbus_property(self, value=None):
859
if value is None: # get
860
return dbus.String(self.host)
861
self.host = value
862
# Emit D-Bus signal
863
self.PropertyChanged(dbus.String(u"host"),
864
dbus.String(value, variant_level=1))
865
866
# created - property
867
@dbus_service_property(_interface, signature=u"s", access=u"read")
868
def created_dbus_property(self):
869
return dbus.String(self._datetime_to_dbus(self.created))
870
871
# last_enabled - property
872
@dbus_service_property(_interface, signature=u"s", access=u"read")
873
def last_enabled_dbus_property(self):
874
if self.last_enabled is None:
875
return dbus.String(u"")
876
return dbus.String(self._datetime_to_dbus(self.last_enabled))
877
878
# enabled - property
879
@dbus_service_property(_interface, signature=u"b",
880
access=u"readwrite")
881
def enabled_dbus_property(self, value=None):
882
if value is None: # get
883
return dbus.Boolean(self.enabled)
884
if value:
885
self.enable()
886
else:
887
self.disable()
888
889
# last_checked_ok - property
890
@dbus_service_property(_interface, signature=u"s",
891
access=u"readwrite")
892
def last_checked_ok_dbus_property(self, value=None):
893
if value is not None:
894
self.checked_ok()
895
return
896
if self.last_checked_ok is None:
897
return dbus.String(u"")
898
return dbus.String(self._datetime_to_dbus(self
899
.last_checked_ok))
900
901
# timeout - property
902
@dbus_service_property(_interface, signature=u"t",
903
access=u"readwrite")
904
def timeout_dbus_property(self, value=None):
905
if value is None: # get
906
return dbus.UInt64(self.timeout_milliseconds())
907
self.timeout = datetime.timedelta(0, 0, 0, value)
908
# Emit D-Bus signal
909
self.PropertyChanged(dbus.String(u"timeout"),
910
dbus.UInt64(value, variant_level=1))
911
if getattr(self, u"disable_initiator_tag", None) is None:
912
return
913
# Reschedule timeout
914
gobject.source_remove(self.disable_initiator_tag)
915
self.disable_initiator_tag = None
916
time_to_die = (self.
917
_timedelta_to_milliseconds((self
918
.last_checked_ok
919
+ self.timeout)
920
- datetime.datetime
921
.utcnow()))
922
if time_to_die <= 0:
923
# The timeout has passed
924
self.disable()
925
else:
926
self.disable_initiator_tag = (gobject.timeout_add
927
(time_to_die, self.disable))
928
929
# interval - property
930
@dbus_service_property(_interface, signature=u"t",
931
access=u"readwrite")
932
def interval_dbus_property(self, value=None):
933
if value is None: # get
934
return dbus.UInt64(self.interval_milliseconds())
935
self.interval = datetime.timedelta(0, 0, 0, value)
936
# Emit D-Bus signal
937
self.PropertyChanged(dbus.String(u"interval"),
938
dbus.UInt64(value, variant_level=1))
939
if getattr(self, u"checker_initiator_tag", None) is None:
940
return
941
# Reschedule checker run
942
gobject.source_remove(self.checker_initiator_tag)
943
self.checker_initiator_tag = (gobject.timeout_add
944
(value, self.start_checker))
945
self.start_checker() # Start one now, too
946
947
# checker - property
948
@dbus_service_property(_interface, signature=u"s",
949
access=u"readwrite")
950
def checker_dbus_property(self, value=None):
951
if value is None: # get
952
return dbus.String(self.checker_command)
953
self.checker_command = value
954
# Emit D-Bus signal
955
self.PropertyChanged(dbus.String(u"checker"),
956
dbus.String(self.checker_command,
957
variant_level=1))
958
959
# checker_running - property
960
@dbus_service_property(_interface, signature=u"b",
961
access=u"readwrite")
962
def checker_running_dbus_property(self, value=None):
963
if value is None: # get
964
return dbus.Boolean(self.checker is not None)
965
if value:
966
self.start_checker()
967
else:
968
self.stop_checker()
969
970
# object_path - property
971
@dbus_service_property(_interface, signature=u"o", access=u"read")
972
def object_path_dbus_property(self):
973
return self.dbus_object_path # is already a dbus.ObjectPath
974
975
# secret = property
976
@dbus_service_property(_interface, signature=u"ay",
977
access=u"write", byte_arrays=True)
978
def secret_dbus_property(self, value):
979
self.secret = str(value)
980
981
del _interface
982
983
984
class ClientHandler(socketserver.BaseRequestHandler, object):
985
"""A class to handle client connections.
986
987
Instantiated once for each connection to handle it.
379
def peer_certificate(session):
380
"Return the peer's OpenPGP certificate as a bytestring"
381
# If not an OpenPGP certificate...
382
if gnutls.library.functions.gnutls_certificate_type_get\
383
(session._c_object) \
384
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP:
385
# ...do the normal thing
386
return session.peer_certificate
387
list_size = ctypes.c_uint()
388
cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
389
(session._c_object, ctypes.byref(list_size))
390
if list_size.value == 0:
391
return None
392
cert = cert_list[0]
393
return ctypes.string_at(cert.data, cert.size)
394
395
396
def fingerprint(openpgp):
397
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
398
# New GnuTLS "datum" with the OpenPGP public key
399
datum = gnutls.library.types.gnutls_datum_t\
400
(ctypes.cast(ctypes.c_char_p(openpgp),
401
ctypes.POINTER(ctypes.c_ubyte)),
402
ctypes.c_uint(len(openpgp)))
403
# New empty GnuTLS certificate
404
crt = gnutls.library.types.gnutls_openpgp_crt_t()
405
gnutls.library.functions.gnutls_openpgp_crt_init\
406
(ctypes.byref(crt))
407
# Import the OpenPGP public key into the certificate
408
gnutls.library.functions.gnutls_openpgp_crt_import\
409
(crt, ctypes.byref(datum),
410
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
411
# New buffer for the fingerprint
412
buffer = ctypes.create_string_buffer(20)
413
buffer_length = ctypes.c_size_t()
414
# Get the fingerprint from the certificate into the buffer
415
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
416
(crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
417
# Deinit the certificate
418
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
419
# Convert the buffer to a Python bytestring
420
fpr = ctypes.string_at(buffer, buffer_length.value)
421
# Convert the bytestring to hexadecimal notation
422
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
423
return hex_fpr
424
425
426
class tcp_handler(SocketServer.BaseRequestHandler, object):
427
"""A TCP request handler class.
428
Instantiated by IPv6_TCPServer for each request to handle it.
988
429
Note: This will run in its own forked process."""
989
430
990
431
def handle(self):
991
432
logger.info(u"TCP connection from: %s",
992
unicode(self.client_address))
993
logger.debug(u"IPC Pipe FD: %d", self.server.pipe[1])
994
# Open IPC pipe to parent process
995
with closing(os.fdopen(self.server.pipe[1], u"w", 1)) as ipc:
996
session = (gnutls.connection
997
.ClientSession(self.request,
998
gnutls.connection
999
.X509Credentials()))
1000
1001
line = self.request.makefile().readline()
1002
logger.debug(u"Protocol version: %r", line)
1003
try:
1004
if int(line.strip().split()[0]) > 1:
1005
raise RuntimeError
1006
except (ValueError, IndexError, RuntimeError), error:
1007
logger.error(u"Unknown protocol version: %s", error)
1008
return
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
try:
1028
session.handshake()
1029
except gnutls.errors.GNUTLSError, error:
1030
logger.warning(u"Handshake failed: %s", error)
1031
# Do not run session.bye() here: the session is not
1032
# established. Just abandon the request.
1033
return
1034
logger.debug(u"Handshake succeeded")
1035
try:
1036
fpr = self.fingerprint(self.peer_certificate(session))
1037
except (TypeError, gnutls.errors.GNUTLSError), error:
1038
logger.warning(u"Bad certificate: %s", error)
1039
session.bye()
1040
return
1041
logger.debug(u"Fingerprint: %s", fpr)
1042
1043
for c in self.server.clients:
1044
if c.fingerprint == fpr:
1045
client = c
1046
break
1047
else:
1048
ipc.write(u"NOTFOUND %s %s\n"
1049
% (fpr, unicode(self.client_address)))
1050
session.bye()
1051
return
1052
# Have to check if client.still_valid(), since it is
1053
# possible that the client timed out while establishing
1054
# the GnuTLS session.
1055
if not client.still_valid():
1056
ipc.write(u"INVALID %s\n" % client.name)
1057
session.bye()
1058
return
1059
ipc.write(u"SENDING %s\n" % client.name)
1060
sent_size = 0
1061
while sent_size < len(client.secret):
1062
sent = session.send(client.secret[sent_size:])
1063
logger.debug(u"Sent: %d, remaining: %d",
1064
sent, len(client.secret)
1065
- (sent_size + sent))
1066
sent_size += sent
1067
session.bye()
1068
1069
@staticmethod
1070
def peer_certificate(session):
1071
"Return the peer's OpenPGP certificate as a bytestring"
1072
# If not an OpenPGP certificate...
1073
if (gnutls.library.functions
1074
.gnutls_certificate_type_get(session._c_object)
1075
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1076
# ...do the normal thing
1077
return session.peer_certificate
1078
list_size = ctypes.c_uint(1)
1079
cert_list = (gnutls.library.functions
1080
.gnutls_certificate_get_peers
1081
(session._c_object, ctypes.byref(list_size)))
1082
if not bool(cert_list) and list_size.value != 0:
1083
raise gnutls.errors.GNUTLSError(u"error getting peer"
1084
u" certificate")
1085
if list_size.value == 0:
1086
return None
1087
cert = cert_list[0]
1088
return ctypes.string_at(cert.data, cert.size)
1089
1090
@staticmethod
1091
def fingerprint(openpgp):
1092
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1093
# New GnuTLS "datum" with the OpenPGP public key
1094
datum = (gnutls.library.types
1095
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1096
ctypes.POINTER
1097
(ctypes.c_ubyte)),
1098
ctypes.c_uint(len(openpgp))))
1099
# New empty GnuTLS certificate
1100
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1101
(gnutls.library.functions
1102
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1103
# Import the OpenPGP public key into the certificate
1104
(gnutls.library.functions
1105
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1106
gnutls.library.constants
1107
.GNUTLS_OPENPGP_FMT_RAW))
1108
# Verify the self signature in the key
1109
crtverify = ctypes.c_uint()
1110
(gnutls.library.functions
1111
.gnutls_openpgp_crt_verify_self(crt, 0,
1112
ctypes.byref(crtverify)))
1113
if crtverify.value != 0:
1114
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1115
raise (gnutls.errors.CertificateSecurityError
1116
(u"Verify failed"))
1117
# New buffer for the fingerprint
1118
buf = ctypes.create_string_buffer(20)
1119
buf_len = ctypes.c_size_t()
1120
# Get the fingerprint from the certificate into the buffer
1121
(gnutls.library.functions
1122
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1123
ctypes.byref(buf_len)))
1124
# Deinit the certificate
1125
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1126
# Convert the buffer to a Python bytestring
1127
fpr = ctypes.string_at(buf, buf_len.value)
1128
# Convert the bytestring to hexadecimal notation
1129
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
1130
return hex_fpr
1131
1132
1133
class ForkingMixInWithPipe(socketserver.ForkingMixIn, object):
1134
"""Like socketserver.ForkingMixIn, but also pass a pipe."""
1135
def process_request(self, request, client_address):
1136
"""Overrides and wraps the original process_request().
1137
1138
This function creates a new pipe in self.pipe
1139
"""
1140
self.pipe = os.pipe()
1141
super(ForkingMixInWithPipe,
1142
self).process_request(request, client_address)
1143
os.close(self.pipe[1]) # close write end
1144
self.add_pipe(self.pipe[0])
1145
def add_pipe(self, pipe):
1146
"""Dummy function; override as necessary"""
1147
os.close(pipe)
1148
1149
1150
class IPv6_TCPServer(ForkingMixInWithPipe,
1151
socketserver.TCPServer, object):
1152
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1153
433
unicode(self.client_address))
434
session = gnutls.connection.ClientSession\
435
(self.request, gnutls.connection.X509Credentials())
436
437
line = self.request.makefile().readline()
438
logger.debug(u"Protocol version: %r", line)
439
try:
440
if int(line.strip().split()[0]) > 1:
441
raise RuntimeError
442
except (ValueError, IndexError, RuntimeError), error:
443
logger.error(u"Unknown protocol version: %s", error)
444
return
445
446
# Note: gnutls.connection.X509Credentials is really a generic
447
# GnuTLS certificate credentials object so long as no X.509
448
# keys are added to it. Therefore, we can use it here despite
449
# using OpenPGP certificates.
450
451
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
452
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
453
# "+DHE-DSS"))
454
priority = "NORMAL" # Fallback default, since this
455
# MUST be set.
456
if self.server.settings["priority"]:
457
priority = self.server.settings["priority"]
458
gnutls.library.functions.gnutls_priority_set_direct\
459
(session._c_object, priority, None);
460
461
try:
462
session.handshake()
463
except gnutls.errors.GNUTLSError, error:
464
logger.warning(u"Handshake failed: %s", error)
465
# Do not run session.bye() here: the session is not
466
# established. Just abandon the request.
467
return
468
try:
469
fpr = fingerprint(peer_certificate(session))
470
except (TypeError, gnutls.errors.GNUTLSError), error:
471
logger.warning(u"Bad certificate: %s", error)
472
session.bye()
473
return
474
logger.debug(u"Fingerprint: %s", fpr)
475
client = None
476
for c in self.server.clients:
477
if c.fingerprint == fpr:
478
client = c
479
break
480
if not client:
481
logger.warning(u"Client not found for fingerprint: %s",
482
fpr)
483
session.bye()
484
return
485
# Have to check if client.still_valid(), since it is possible
486
# that the client timed out while establishing the GnuTLS
487
# session.
488
if not client.still_valid():
489
logger.warning(u"Client %(name)s is invalid",
490
vars(client))
491
session.bye()
492
return
493
sent_size = 0
494
while sent_size < len(client.secret):
495
sent = session.send(client.secret[sent_size:])
496
logger.debug(u"Sent: %d, remaining: %d",
497
sent, len(client.secret)
498
- (sent_size + sent))
499
sent_size += sent
500
session.bye()
501
502
503
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
504
"""IPv6 TCP server. Accepts 'None' as address and/or port.
1154
505
Attributes:
1155
enabled: Boolean; whether this server is activated yet
1156
interface: None or a network interface name (string)
1157
use_ipv6: Boolean; to use IPv6 or not
506
settings: Server settings
507
clients: Set() of Client objects
1158
508
"""
1159
def __init__(self, server_address, RequestHandlerClass,
1160
interface=None, use_ipv6=True):
1161
self.interface = interface
1162
if use_ipv6:
1163
self.address_family = socket.AF_INET6
1164
socketserver.TCPServer.__init__(self, server_address,
1165
RequestHandlerClass)
509
address_family = socket.AF_INET6
510
def __init__(self, *args, **kwargs):
511
if "settings" in kwargs:
512
self.settings = kwargs["settings"]
513
del kwargs["settings"]
514
if "clients" in kwargs:
515
self.clients = kwargs["clients"]
516
del kwargs["clients"]
517
return super(type(self), self).__init__(*args, **kwargs)
1166
518
def server_bind(self):
1167
519
"""This overrides the normal server_bind() function
1168
520
to bind to an interface if one was specified, and also NOT to
1169
521
bind to an address or port if they were not specified."""
1170
if self.interface is not None:
1171
if SO_BINDTODEVICE is None:
1172
logger.error(u"SO_BINDTODEVICE does not exist;"
1173
u" cannot bind to interface %s",
1174
self.interface)
1175
else:
1176
try:
1177
self.socket.setsockopt(socket.SOL_SOCKET,
1178
SO_BINDTODEVICE,
1179
str(self.interface
1180
+ u'\0'))
1181
except socket.error, error:
1182
if error[0] == errno.EPERM:
1183
logger.error(u"No permission to"
1184
u" bind to interface %s",
1185
self.interface)
1186
elif error[0] == errno.ENOPROTOOPT:
1187
logger.error(u"SO_BINDTODEVICE not available;"
1188
u" cannot bind to interface %s",
1189
self.interface)
1190
else:
1191
raise
522
if self.settings["interface"]:
523
# 25 is from /usr/include/asm-i486/socket.h
524
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
525
try:
526
self.socket.setsockopt(socket.SOL_SOCKET,
527
SO_BINDTODEVICE,
528
self.settings["interface"])
529
except socket.error, error:
530
if error[0] == errno.EPERM:
531
logger.error(u"No permission to"
532
u" bind to interface %s",
533
self.settings["interface"])
534
else:
535
raise error
1192
536
# Only bind(2) the socket if we really need to.
1193
537
if self.server_address[0] or self.server_address[1]:
1194
538
if not self.server_address[0]:
1195
if self.address_family == socket.AF_INET6:
1196
any_address = u"::" # in6addr_any
1197
else:
1198
any_address = socket.INADDR_ANY
1199
self.server_address = (any_address,
539
in6addr_any = "::"
540
self.server_address = (in6addr_any,
1200
541
self.server_address[1])
1201
elif not self.server_address[1]:
542
elif self.server_address[1] is None:
1202
543
self.server_address = (self.server_address[0],
1203
544
0)
1204
# if self.interface:
1205
# self.server_address = (self.server_address[0],
1206
# 0, # port
1207
# 0, # flowinfo
1208
# if_nametoindex
1209
# (self.interface))
1210
return socketserver.TCPServer.server_bind(self)
1211
1212
1213
class MandosServer(IPv6_TCPServer):
1214
"""Mandos server.
1215
1216
Attributes:
1217
clients: set of Client objects
1218
gnutls_priority GnuTLS priority string
1219
use_dbus: Boolean; to emit D-Bus signals or not
1220
1221
Assumes a gobject.MainLoop event loop.
1222
"""
1223
def __init__(self, server_address, RequestHandlerClass,
1224
interface=None, use_ipv6=True, clients=None,
1225
gnutls_priority=None, use_dbus=True):
1226
self.enabled = False
1227
self.clients = clients
1228
if self.clients is None:
1229
self.clients = set()
1230
self.use_dbus = use_dbus
1231
self.gnutls_priority = gnutls_priority
1232
IPv6_TCPServer.__init__(self, server_address,
1233
RequestHandlerClass,
1234
interface = interface,
1235
use_ipv6 = use_ipv6)
1236
def server_activate(self):
1237
if self.enabled:
1238
return socketserver.TCPServer.server_activate(self)
1239
def enable(self):
1240
self.enabled = True
1241
def add_pipe(self, pipe):
1242
# Call "handle_ipc" for both data and EOF events
1243
gobject.io_add_watch(pipe, gobject.IO_IN | gobject.IO_HUP,
1244
self.handle_ipc)
1245
def handle_ipc(self, source, condition, file_objects={}):
1246
condition_names = {
1247
gobject.IO_IN: u"IN", # There is data to read.
1248
gobject.IO_OUT: u"OUT", # Data can be written (without
1249
# blocking).
1250
gobject.IO_PRI: u"PRI", # There is urgent data to read.
1251
gobject.IO_ERR: u"ERR", # Error condition.
1252
gobject.IO_HUP: u"HUP" # Hung up (the connection has been
1253
# broken, usually for pipes and
1254
# sockets).
1255
}
1256
conditions_string = ' | '.join(name
1257
for cond, name in
1258
condition_names.iteritems()
1259
if cond & condition)
1260
logger.debug(u"Handling IPC: FD = %d, condition = %s", source,
1261
conditions_string)
1262
1263
# Turn the pipe file descriptor into a Python file object
1264
if source not in file_objects:
1265
file_objects[source] = os.fdopen(source, u"r", 1)
1266
1267
# Read a line from the file object
1268
cmdline = file_objects[source].readline()
1269
if not cmdline: # Empty line means end of file
1270
# close the IPC pipe
1271
file_objects[source].close()
1272
del file_objects[source]
1273
1274
# Stop calling this function
1275
return False
1276
1277
logger.debug(u"IPC command: %r", cmdline)
1278
1279
# Parse and act on command
1280
cmd, args = cmdline.rstrip(u"\r\n").split(None, 1)
1281
1282
if cmd == u"NOTFOUND":
1283
logger.warning(u"Client not found for fingerprint: %s",
1284
args)
1285
if self.use_dbus:
1286
# Emit D-Bus signal
1287
mandos_dbus_service.ClientNotFound(args)
1288
elif cmd == u"INVALID":
1289
for client in self.clients:
1290
if client.name == args:
1291
logger.warning(u"Client %s is invalid", args)
1292
if self.use_dbus:
1293
# Emit D-Bus signal
1294
client.Rejected()
1295
break
1296
else:
1297
logger.error(u"Unknown client %s is invalid", args)
1298
elif cmd == u"SENDING":
1299
for client in self.clients:
1300
if client.name == args:
1301
logger.info(u"Sending secret to %s", client.name)
1302
client.checked_ok()
1303
if self.use_dbus:
1304
# Emit D-Bus signal
1305
client.GotSecret()
1306
break
1307
else:
1308
logger.error(u"Sending secret to unknown client %s",
1309
args)
1310
else:
1311
logger.error(u"Unknown IPC command: %r", cmdline)
1312
1313
# Keep calling this function
1314
return True
545
return super(type(self), self).server_bind()
1315
546
1316
547
1317
548
def string_to_delta(interval):
1318
549
"""Parse a string and return a datetime.timedelta
1319
1320
>>> string_to_delta(u'7d')
550
551
>>> string_to_delta('7d')
1321
552
datetime.timedelta(7)
1322
>>> string_to_delta(u'60s')
553
>>> string_to_delta('60s')
1323
554
datetime.timedelta(0, 60)
1324
>>> string_to_delta(u'60m')
555
>>> string_to_delta('60m')
1325
556
datetime.timedelta(0, 3600)
1326
>>> string_to_delta(u'24h')
557
>>> string_to_delta('24h')
1327
558
datetime.timedelta(1)
1328
559
>>> string_to_delta(u'1w')
1329
560
datetime.timedelta(7)
1330
>>> string_to_delta(u'5m 30s')
1331
datetime.timedelta(0, 330)
1332
561
"""
1333
timevalue = datetime.timedelta(0)
1334
for s in interval.split():
1335
try:
1336
suffix = unicode(s[-1])
1337
value = int(s[:-1])
1338
if suffix == u"d":
1339
delta = datetime.timedelta(value)
1340
elif suffix == u"s":
1341
delta = datetime.timedelta(0, value)
1342
elif suffix == u"m":
1343
delta = datetime.timedelta(0, 0, 0, 0, value)
1344
elif suffix == u"h":
1345
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
1346
elif suffix == u"w":
1347
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1348
else:
1349
raise ValueError(u"Unknown suffix %r" % suffix)
1350
except (ValueError, IndexError), e:
1351
raise ValueError(e.message)
1352
timevalue += delta
1353
return timevalue
1354
562
try:
563
suffix=unicode(interval[-1])
564
value=int(interval[:-1])
565
if suffix == u"d":
566
delta = datetime.timedelta(value)
567
elif suffix == u"s":
568
delta = datetime.timedelta(0, value)
569
elif suffix == u"m":
570
delta = datetime.timedelta(0, 0, 0, 0, value)
571
elif suffix == u"h":
572
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
573
elif suffix == u"w":
574
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
575
else:
576
raise ValueError
577
except (ValueError, IndexError):
578
raise ValueError
579
return delta
580
581
582
def server_state_changed(state):
583
"""Derived from the Avahi example code"""
584
if state == avahi.SERVER_COLLISION:
585
logger.error(u"Server name collision")
586
service.remove()
587
elif state == avahi.SERVER_RUNNING:
588
service.add()
589
590
591
def entry_group_state_changed(state, error):
592
"""Derived from the Avahi example code"""
593
logger.debug(u"state change: %i", state)
594
595
if state == avahi.ENTRY_GROUP_ESTABLISHED:
596
logger.debug(u"Service established.")
597
elif state == avahi.ENTRY_GROUP_COLLISION:
598
logger.warning(u"Service name collision.")
599
service.rename()
600
elif state == avahi.ENTRY_GROUP_FAILURE:
601
logger.critical(u"Error in group state changed %s",
602
unicode(error))
603
raise AvahiGroupError("State changed: %s", str(error))
1355
604
1356
605
def if_nametoindex(interface):
1357
"""Call the C function if_nametoindex(), or equivalent
1358
1359
Note: This function cannot accept a unicode string."""
606
"""Call the C function if_nametoindex(), or equivalent"""
1360
607
global if_nametoindex
1361
608
try:
1362
if_nametoindex = (ctypes.cdll.LoadLibrary
1363
(ctypes.util.find_library(u"c"))
1364
.if_nametoindex)
609
if "ctypes.util" not in sys.modules:
610
import ctypes.util
611
if_nametoindex = ctypes.cdll.LoadLibrary\
612
(ctypes.util.find_library("c")).if_nametoindex
1365
613
except (OSError, AttributeError):
1366
logger.warning(u"Doing if_nametoindex the hard way")
614
if "struct" not in sys.modules:
615
import struct
616
if "fcntl" not in sys.modules:
617
import fcntl
1367
618
def if_nametoindex(interface):
1368
619
"Get an interface index the hard way, i.e. using fcntl()"
1369
620
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1370
with closing(socket.socket()) as s:
1371
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1372
struct.pack(str(u"16s16x"),
1373
interface))
1374
interface_index = struct.unpack(str(u"I"),
1375
ifreq[16:20])[0]
621
s = socket.socket()
622
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
623
struct.pack("16s16x", interface))
624
s.close()
625
interface_index = struct.unpack("I", ifreq[16:20])[0]
1376
626
return interface_index
1377
627
return if_nametoindex(interface)
1378
628
1379
629
1380
def daemon(nochdir = False, noclose = False):
630
def daemon(nochdir, noclose):
1381
631
"""See daemon(3). Standard BSD Unix function.
1382
1383
632
This should really exist as os.daemon, but it doesn't (yet)."""
1384
633
if os.fork():
1385
634
sys.exit()
1386
635
os.setsid()
1387
636
if not nochdir:
1388
os.chdir(u"/")
1389
if os.fork():
1390
sys.exit()
637
os.chdir("/")
1391
638
if not noclose:
1392
639
# Close all standard open file descriptors
1393
640
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1394
641
if not stat.S_ISCHR(os.fstat(null).st_mode):
1395
642
raise OSError(errno.ENODEV,
1396
u"%s not a character device"
1397
% os.path.devnull)
643
"/dev/null not a character device")
1398
644
os.dup2(null, sys.stdin.fileno())
1399
645
os.dup2(null, sys.stdout.fileno())
1400
646
os.dup2(null, sys.stderr.fileno())
1403
649
1404
650
1405
651
def main():
1406
1407
##################################################################
1408
# Parsing of options, both command line and config file
1409
1410
parser = optparse.OptionParser(version = "%%prog %s" % version)
1411
parser.add_option("-i", u"--interface", type=u"string",
1412
metavar="IF", help=u"Bind to interface IF")
1413
parser.add_option("-a", u"--address", type=u"string",
1414
help=u"Address to listen for requests on")
1415
parser.add_option("-p", u"--port", type=u"int",
1416
help=u"Port number to receive requests on")
1417
parser.add_option("--check", action=u"store_true",
1418
help=u"Run self-test")
1419
parser.add_option("--debug", action=u"store_true",
1420
help=u"Debug mode; run in foreground and log to"
1421
u" terminal")
1422
parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1423
u" priority string (see GnuTLS documentation)")
1424
parser.add_option("--servicename", type=u"string",
1425
metavar=u"NAME", help=u"Zeroconf service name")
1426
parser.add_option("--configdir", type=u"string",
1427
default=u"/etc/mandos", metavar=u"DIR",
1428
help=u"Directory to search for configuration"
1429
u" files")
1430
parser.add_option("--no-dbus", action=u"store_false",
1431
dest=u"use_dbus", help=u"Do not provide D-Bus"
1432
u" system bus interface")
1433
parser.add_option("--no-ipv6", action=u"store_false",
1434
dest=u"use_ipv6", help=u"Do not use IPv6")
1435
options = parser.parse_args()[0]
652
global main_loop_started
653
main_loop_started = False
654
655
parser = OptionParser()
656
parser.add_option("-i", "--interface", type="string",
657
metavar="IF", help="Bind to interface IF")
658
parser.add_option("-a", "--address", type="string",
659
help="Address to listen for requests on")
660
parser.add_option("-p", "--port", type="int",
661
help="Port number to receive requests on")
662
parser.add_option("--check", action="store_true", default=False,
663
help="Run self-test")
664
parser.add_option("--debug", action="store_true", default=False,
665
help="Debug mode; run in foreground and log to"
666
" terminal")
667
parser.add_option("--priority", type="string", help="GnuTLS"
668
" priority string (see GnuTLS documentation)")
669
parser.add_option("--servicename", type="string", metavar="NAME",
670
help="Zeroconf service name")
671
parser.add_option("--configdir", type="string",
672
default="/etc/mandos", metavar="DIR",
673
help="Directory to search for configuration"
674
" files")
675
(options, args) = parser.parse_args()
1436
676
1437
677
if options.check:
1438
678
import doctest
1440
680
sys.exit()
1441
681
1442
682
# Default values for config file for server-global settings
1443
server_defaults = { u"interface": u"",
1444
u"address": u"",
1445
u"port": u"",
1446
u"debug": u"False",
1447
u"priority":
1448
u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1449
u"servicename": u"Mandos",
1450
u"use_dbus": u"True",
1451
u"use_ipv6": u"True",
683
server_defaults = { "interface": "",
684
"address": "",
685
"port": "",
686
"debug": "False",
687
"priority":
688
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
689
"servicename": "Mandos",
1452
690
}
1453
691
1454
692
# Parse config file for server-global settings
1455
server_config = configparser.SafeConfigParser(server_defaults)
693
server_config = ConfigParser.SafeConfigParser(server_defaults)
1456
694
del server_defaults
1457
server_config.read(os.path.join(options.configdir,
1458
u"mandos.conf"))
695
server_config.read(os.path.join(options.configdir, "server.conf"))
696
server_section = "server"
1459
697
# Convert the SafeConfigParser object to a dict
1460
server_settings = server_config.defaults()
1461
# Use the appropriate methods on the non-string config options
1462
for option in (u"debug", u"use_dbus", u"use_ipv6"):
1463
server_settings[option] = server_config.getboolean(u"DEFAULT",
1464
option)
1465
if server_settings["port"]:
1466
server_settings["port"] = server_config.getint(u"DEFAULT",
1467
u"port")
698
server_settings = dict(server_config.items(server_section))
699
# Use getboolean on the boolean config option
700
server_settings["debug"] = server_config.getboolean\
701
(server_section, "debug")
1468
702
del server_config
1469
703
1470
704
# Override the settings from the config file with command line
1471
705
# options, if set.
1472
for option in (u"interface", u"address", u"port", u"debug",
1473
u"priority", u"servicename", u"configdir",
1474
u"use_dbus", u"use_ipv6"):
706
for option in ("interface", "address", "port", "debug",
707
"priority", "servicename", "configdir"):
1475
708
value = getattr(options, option)
1476
709
if value is not None:
1477
710
server_settings[option] = value
1478
711
del options
1479
# Force all strings to be unicode
1480
for option in server_settings.keys():
1481
if type(server_settings[option]) is str:
1482
server_settings[option] = unicode(server_settings[option])
1483
712
# Now we have our good server settings in "server_settings"
1484
713
1485
##################################################################
1486
1487
# For convenience
1488
debug = server_settings[u"debug"]
1489
use_dbus = server_settings[u"use_dbus"]
1490
use_ipv6 = server_settings[u"use_ipv6"]
1491
1492
if not debug:
1493
syslogger.setLevel(logging.WARNING)
1494
console.setLevel(logging.WARNING)
1495
1496
if server_settings[u"servicename"] != u"Mandos":
1497
syslogger.setFormatter(logging.Formatter
1498
(u'Mandos (%s) [%%(process)d]:'
1499
u' %%(levelname)s: %%(message)s'
1500
% server_settings[u"servicename"]))
1501
1502
714
# Parse config file with clients
1503
client_defaults = { u"timeout": u"1h",
1504
u"interval": u"5m",
1505
u"checker": u"fping -q -- %%(host)s",
1506
u"host": u"",
715
client_defaults = { "timeout": "1h",
716
"interval": "5m",
717
"checker": "fping -q -- %%(fqdn)s",
1507
718
}
1508
client_config = configparser.SafeConfigParser(client_defaults)
1509
client_config.read(os.path.join(server_settings[u"configdir"],
1510
u"clients.conf"))
1511
1512
global mandos_dbus_service
1513
mandos_dbus_service = None
1514
1515
tcp_server = MandosServer((server_settings[u"address"],
1516
server_settings[u"port"]),
1517
ClientHandler,
1518
interface=server_settings[u"interface"],
1519
use_ipv6=use_ipv6,
1520
gnutls_priority=
1521
server_settings[u"priority"],
1522
use_dbus=use_dbus)
1523
pidfilename = u"/var/run/mandos.pid"
1524
try:
1525
pidfile = open(pidfilename, u"w")
1526
except IOError:
1527
logger.error(u"Could not open file %r", pidfilename)
1528
1529
try:
1530
uid = pwd.getpwnam(u"_mandos").pw_uid
1531
gid = pwd.getpwnam(u"_mandos").pw_gid
1532
except KeyError:
1533
try:
1534
uid = pwd.getpwnam(u"mandos").pw_uid
1535
gid = pwd.getpwnam(u"mandos").pw_gid
1536
except KeyError:
1537
try:
1538
uid = pwd.getpwnam(u"nobody").pw_uid
1539
gid = pwd.getpwnam(u"nobody").pw_gid
1540
except KeyError:
1541
uid = 65534
1542
gid = 65534
1543
try:
1544
os.setgid(gid)
1545
os.setuid(uid)
1546
except OSError, error:
1547
if error[0] != errno.EPERM:
1548
raise error
1549
1550
# Enable all possible GnuTLS debugging
1551
if debug:
1552
# "Use a log level over 10 to enable all debugging options."
1553
# - GnuTLS manual
1554
gnutls.library.functions.gnutls_global_set_log_level(11)
1555
1556
@gnutls.library.types.gnutls_log_func
1557
def debug_gnutls(level, string):
1558
logger.debug(u"GnuTLS: %s", string[:-1])
1559
1560
(gnutls.library.functions
1561
.gnutls_global_set_log_function(debug_gnutls))
719
client_config = ConfigParser.SafeConfigParser(client_defaults)
720
client_config.read(os.path.join(server_settings["configdir"],
721
"clients.conf"))
722
723
global service
724
service = AvahiService(name = server_settings["servicename"],
725
type = "_mandos._tcp", );
726
if server_settings["interface"]:
727
service.interface = if_nametoindex(server_settings["interface"])
1562
728
1563
729
global main_loop
730
global bus
731
global server
1564
732
# From the Avahi example code
1565
733
DBusGMainLoop(set_as_default=True )
1566
734
main_loop = gobject.MainLoop()
1567
735
bus = dbus.SystemBus()
736
server = dbus.Interface(
737
bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
738
avahi.DBUS_INTERFACE_SERVER )
1568
739
# End of Avahi example code
1569
if use_dbus:
1570
try:
1571
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos",
1572
bus, do_not_queue=True)
1573
except dbus.exceptions.NameExistsException, e:
1574
logger.error(unicode(e) + u", disabling D-Bus")
1575
use_dbus = False
1576
server_settings[u"use_dbus"] = False
1577
tcp_server.use_dbus = False
1578
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1579
service = AvahiService(name = server_settings[u"servicename"],
1580
servicetype = u"_mandos._tcp",
1581
protocol = protocol, bus = bus)
1582
if server_settings["interface"]:
1583
service.interface = (if_nametoindex
1584
(str(server_settings[u"interface"])))
1585
740
1586
client_class = Client
1587
if use_dbus:
1588
client_class = functools.partial(ClientDBus, bus = bus)
1589
tcp_server.clients.update(set(
1590
client_class(name = section,
1591
config= dict(client_config.items(section)))
1592
for section in client_config.sections()))
1593
if not tcp_server.clients:
1594
logger.warning(u"No clients defined")
741
debug = server_settings["debug"]
1595
742
1596
743
if debug:
1597
# Redirect stdin so all checkers get /dev/null
1598
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1599
os.dup2(null, sys.stdin.fileno())
1600
if null > 2:
1601
os.close(null)
1602
else:
1603
# No console logging
1604
logger.removeHandler(console)
1605
# Close all input and output, do double fork, etc.
1606
daemon()
1607
1608
try:
1609
with closing(pidfile):
1610
pid = os.getpid()
1611
pidfile.write(str(pid) + "\n")
1612
del pidfile
1613
except IOError:
1614
logger.error(u"Could not write to file %r with PID %d",
1615
pidfilename, pid)
1616
except NameError:
1617
# "pidfile" was never created
1618
pass
1619
del pidfilename
744
console = logging.StreamHandler()
745
# console.setLevel(logging.DEBUG)
746
console.setFormatter(logging.Formatter\
747
('%(levelname)s: %(message)s'))
748
logger.addHandler(console)
749
del console
750
751
clients = Set()
752
def remove_from_clients(client):
753
clients.remove(client)
754
if not clients:
755
logger.critical(u"No clients left, exiting")
756
sys.exit()
757
758
clients.update(Set(Client(name = section,
759
stop_hook = remove_from_clients,
760
config
761
= dict(client_config.items(section)))
762
for section in client_config.sections()))
763
764
if not debug:
765
daemon(False, False)
766
767
def cleanup():
768
"Cleanup function; run on exit"
769
global group
770
# From the Avahi example code
771
if not group is None:
772
group.Free()
773
group = None
774
# End of Avahi example code
775
776
while clients:
777
client = clients.pop()
778
client.stop_hook = None
779
client.stop()
780
781
atexit.register(cleanup)
1620
782
1621
783
if not debug:
1622
784
signal.signal(signal.SIGINT, signal.SIG_IGN)
1623
785
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1624
786
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1625
787
1626
if use_dbus:
1627
class MandosDBusService(dbus.service.Object):
1628
"""A D-Bus proxy object"""
1629
def __init__(self):
1630
dbus.service.Object.__init__(self, bus, u"/")
1631
_interface = u"se.bsnet.fukt.Mandos"
1632
1633
@dbus.service.signal(_interface, signature=u"oa{sv}")
1634
def ClientAdded(self, objpath, properties):
1635
"D-Bus signal"
1636
pass
1637
1638
@dbus.service.signal(_interface, signature=u"s")
1639
def ClientNotFound(self, fingerprint):
1640
"D-Bus signal"
1641
pass
1642
1643
@dbus.service.signal(_interface, signature=u"os")
1644
def ClientRemoved(self, objpath, name):
1645
"D-Bus signal"
1646
pass
1647
1648
@dbus.service.method(_interface, out_signature=u"ao")
1649
def GetAllClients(self):
1650
"D-Bus method"
1651
return dbus.Array(c.dbus_object_path
1652
for c in tcp_server.clients)
1653
1654
@dbus.service.method(_interface,
1655
out_signature=u"a{oa{sv}}")
1656
def GetAllClientsWithProperties(self):
1657
"D-Bus method"
1658
return dbus.Dictionary(
1659
((c.dbus_object_path, c.GetAll(u""))
1660
for c in tcp_server.clients),
1661
signature=u"oa{sv}")
1662
1663
@dbus.service.method(_interface, in_signature=u"o")
1664
def RemoveClient(self, object_path):
1665
"D-Bus method"
1666
for c in tcp_server.clients:
1667
if c.dbus_object_path == object_path:
1668
tcp_server.clients.remove(c)
1669
c.remove_from_connection()
1670
# Don't signal anything except ClientRemoved
1671
c.disable(quiet=True)
1672
# Emit D-Bus signal
1673
self.ClientRemoved(object_path, c.name)
1674
return
1675
raise KeyError(object_path)
1676
1677
del _interface
1678
1679
mandos_dbus_service = MandosDBusService()
1680
1681
def cleanup():
1682
"Cleanup function; run on exit"
1683
service.cleanup()
1684
1685
while tcp_server.clients:
1686
client = tcp_server.clients.pop()
1687
if use_dbus:
1688
client.remove_from_connection()
1689
client.disable_hook = None
1690
# Don't signal anything except ClientRemoved
1691
client.disable(quiet=True)
1692
if use_dbus:
1693
# Emit D-Bus signal
1694
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
1695
client.name)
1696
1697
atexit.register(cleanup)
1698
1699
for client in tcp_server.clients:
1700
if use_dbus:
1701
# Emit D-Bus signal
1702
mandos_dbus_service.ClientAdded(client.dbus_object_path,
1703
client.GetAll(u""))
1704
client.enable()
1705
1706
tcp_server.enable()
1707
tcp_server.server_activate()
1708
788
for client in clients:
789
client.start()
790
791
tcp_server = IPv6_TCPServer((server_settings["address"],
792
server_settings["port"]),
793
tcp_handler,
794
settings=server_settings,
795
clients=clients)
1709
796
# Find out what port we got
1710
797
service.port = tcp_server.socket.getsockname()[1]
1711
if use_ipv6:
1712
logger.info(u"Now listening on address %r, port %d,"
1713
" flowinfo %d, scope_id %d"
1714
% tcp_server.socket.getsockname())
1715
else: # IPv4
1716
logger.info(u"Now listening on address %r, port %d"
1717
% tcp_server.socket.getsockname())
798
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
799
u" scope_id %d" % tcp_server.socket.getsockname())
1718
800
1719
801
#service.interface = tcp_server.socket.getsockname()[3]
1720
802
1721
803
try:
1722
804
# From the Avahi example code
805
server.connect_to_signal("StateChanged", server_state_changed)
1723
806
try:
1724
service.activate()
807
server_state_changed(server.GetState())
1725
808
except dbus.exceptions.DBusException, error:
1726
809
logger.critical(u"DBusException: %s", error)
1727
cleanup()
1728
810
sys.exit(1)
1729
811
# End of Avahi example code
1730
812
1731
813
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
1732
814
lambda *args, **kwargs:
1733
(tcp_server.handle_request
1734
(*args[2:], **kwargs) or True))
815
tcp_server.handle_request\
816
(*args[2:], **kwargs) or True)
1735
817
1736
logger.debug(u"Starting main loop")
818
logger.debug("Starting main loop")
819
main_loop_started = True
1737
820
main_loop.run()
1738
821
except AvahiError, error:
1739
logger.critical(u"AvahiError: %s", error)
1740
cleanup()
822
logger.critical(u"AvahiError: %s" + unicode(error))
1741
823
sys.exit(1)
1742
824
except KeyboardInterrupt:
1743
825
if debug:
1744
print >> sys.stderr
1745
logger.debug(u"Server received KeyboardInterrupt")
1746
logger.debug(u"Server exiting")
1747
# Must run before the D-Bus bus name gets deregistered
1748
cleanup()
826
print
1749
827
1750
828
if __name__ == '__main__':
1751
829
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0