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- Committer: Teddy Hogeborn
- Date: 2008-08-07 21:45:41 UTC
- Revision ID: teddy@fukt.bsnet.se-20080807214541-pyg8itw6kphz1dy5
* plugbasedclient.c: Renamed to "mandos-client.c". All users changed.
* plugins.d/mandosclient.c: Renamed to "plugins.d/password-request.c".
All users changed.
* plugins.d/passprompt.c: Renamed to "plugins.d/password-prompt.c".
All users changed.
* server.conf: Renamed to "mandos.conf". All users changed.
* server.py: Renamed to "mandos".
(daemon): Have default values for arguments. Caller changed.
* Makefile (distclean, mostlyclean, maintainer-clean): New aliases for
"clean".
(check, run-client, run-server): New.
* network-protocol.txt: New.
* plugins.d/mandosclient.c: Renamed to "plugins.d/password-request.c".
All users changed.
* plugins.d/passprompt.c: Renamed to "plugins.d/password-prompt.c".
All users changed.
* server.conf: Renamed to "mandos.conf". All users changed.
* server.py: Renamed to "mandos".
(daemon): Have default values for arguments. Caller changed.
* Makefile (distclean, mostlyclean, maintainer-clean): New aliases for
"clean".
(check, run-client, run-server): New.
* network-protocol.txt: New.
- files added:
- network-protocol.txt
- files removed:
- .bzr-builddeb
- debian
- debian/po
- files renamed:
- plugin-runner.c => mandos-client.c
- plugins.d/mandos-client.c => plugins.d/password-request.c
- files modified:
- Makefile
added
removed
mandos
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
# methods "add" and "remove" in the "AvahiService" class, the
10
# "server_state_changed" and "entry_group_state_changed" functions,
11
# and some lines in "main".
12
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
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#
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
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# 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 = "1.0.12"
83
84
logger = logging.Logger(u'mandos')
85
syslogger = (logging.handlers.SysLogHandler
86
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
87
address = "/dev/log"))
88
syslogger.setFormatter(logging.Formatter
89
(u'Mandos [%(process)d]: %(levelname)s:'
90
u' %(message)s'))
63
64
65
logger = logging.Logger('mandos')
66
syslogger = logging.handlers.SysLogHandler\
67
(facility = logging.handlers.SysLogHandler.LOG_DAEMON)
68
syslogger.setFormatter(logging.Formatter\
69
('%(levelname)s: %(message)s'))
91
70
logger.addHandler(syslogger)
71
del syslogger
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72
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
73
99
74
class AvahiError(Exception):
100
def __init__(self, value, *args, **kwargs):
75
def __init__(self, value):
101
76
self.value = value
102
super(AvahiError, self).__init__(value, *args, **kwargs)
103
def __unicode__(self):
104
return unicode(repr(self.value))
77
def __str__(self):
78
return repr(self.value)
105
79
106
80
class AvahiServiceError(AvahiError):
107
81
pass
112
86
113
87
class AvahiService(object):
114
88
"""An Avahi (Zeroconf) service.
115
116
89
Attributes:
117
90
interface: integer; avahi.IF_UNSPEC or an interface index.
118
91
Used to optionally bind to the specified interface.
119
name: string; Example: u'Mandos'
120
type: string; Example: u'_mandos._tcp'.
92
name: string; Example: 'Mandos'
93
type: string; Example: '_mandos._tcp'.
121
94
See <http://www.dns-sd.org/ServiceTypes.html>
122
95
port: integer; what port to announce
123
96
TXT: list of strings; TXT record for the service
126
99
max_renames: integer; maximum number of renames
127
100
rename_count: integer; counter so we only rename after collisions
128
101
a sensible number of times
129
group: D-Bus Entry Group
130
server: D-Bus Server
131
bus: dbus.SystemBus()
132
102
"""
133
103
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):
104
type = None, port = None, TXT = None, domain = "",
105
host = "", max_renames = 12):
137
106
self.interface = interface
138
107
self.name = name
139
self.type = servicetype
108
self.type = type
140
109
self.port = port
141
self.TXT = TXT if TXT is not None else []
110
if TXT is None:
111
self.TXT = []
112
else:
113
self.TXT = TXT
142
114
self.domain = domain
143
115
self.host = host
144
116
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
117
def rename(self):
151
118
"""Derived from the Avahi example code"""
152
119
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))
120
logger.critical(u"No suitable service name found after %i"
121
u" retries, exiting.", rename_count)
122
raise AvahiServiceError("Too many renames")
123
name = server.GetAlternativeServiceName(name)
124
logger.error(u"Changing name to %r ...", name)
164
125
self.remove()
165
126
self.add()
166
127
self.rename_count += 1
167
128
def remove(self):
168
129
"""Derived from the Avahi example code"""
169
if self.group is not None:
170
self.group.Reset()
130
if group is not None:
131
group.Reset()
171
132
def add(self):
172
133
"""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())
134
global group
135
if group is None:
136
group = dbus.Interface\
137
(bus.get_object(avahi.DBUS_NAME,
138
server.EntryGroupNew()),
139
avahi.DBUS_INTERFACE_ENTRY_GROUP)
140
group.connect_to_signal('StateChanged',
141
entry_group_state_changed)
142
logger.debug(u"Adding service '%s' of type '%s' ...",
143
service.name, service.type)
144
group.AddService(
145
self.interface, # interface
146
avahi.PROTO_INET6, # protocol
147
dbus.UInt32(0), # flags
148
self.name, self.type,
149
self.domain, self.host,
150
dbus.UInt16(self.port),
151
avahi.string_array_to_txt_array(self.TXT))
152
group.Commit()
153
154
# From the Avahi example code:
155
group = None # our entry group
156
# End of Avahi example code
228
157
229
158
230
159
class Client(object):
231
160
"""A representation of a client host served by this server.
232
233
161
Attributes:
234
name: string; from the config file, used in log messages and
235
D-Bus identifiers
162
name: string; from the config file, used in log messages
236
163
fingerprint: string (40 or 32 hexadecimal digits); used to
237
164
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.
165
secret: bytestring; sent verbatim (over TLS) to client
166
fqdn: string (FQDN); available for use by the checker command
167
created: datetime.datetime(); object creation, not client host
168
last_checked_ok: datetime.datetime() or None if not yet checked OK
169
timeout: datetime.timedelta(); How long from last_checked_ok
170
until this client is invalid
171
interval: datetime.timedelta(); How often to start a new checker
172
stop_hook: If set, called by stop() as stop_hook(self)
173
checker: subprocess.Popen(); a running checker process used
174
to see if the client lives.
175
'None' if no process is running.
251
176
checker_initiator_tag: a gobject event source tag, or None
252
disable_initiator_tag: - '' -
177
stop_initiator_tag: - '' -
253
178
checker_callback_tag: - '' -
254
179
checker_command: string; External command which is run to check if
255
180
client lives. %() expansions are done at
256
181
runtime with vars(self) as dict, so that for
257
182
instance %(name)s can be used in the command.
258
current_checker_command: string; current running checker_command
183
Private attibutes:
184
_timeout: Real variable for 'timeout'
185
_interval: Real variable for 'interval'
186
_timeout_milliseconds: Used when calling gobject.timeout_add()
187
_interval_milliseconds: - '' -
259
188
"""
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):
189
def _set_timeout(self, timeout):
190
"Setter function for 'timeout' attribute"
191
self._timeout = timeout
192
self._timeout_milliseconds = ((self.timeout.days
193
* 24 * 60 * 60 * 1000)
194
+ (self.timeout.seconds * 1000)
195
+ (self.timeout.microseconds
196
// 1000))
197
timeout = property(lambda self: self._timeout,
198
_set_timeout)
199
del _set_timeout
200
def _set_interval(self, interval):
201
"Setter function for 'interval' attribute"
202
self._interval = interval
203
self._interval_milliseconds = ((self.interval.days
204
* 24 * 60 * 60 * 1000)
205
+ (self.interval.seconds
206
* 1000)
207
+ (self.interval.microseconds
208
// 1000))
209
interval = property(lambda self: self._interval,
210
_set_interval)
211
del _set_interval
212
def __init__(self, name = None, stop_hook=None, config={}):
277
213
"""Note: the 'checker' key in 'config' sets the
278
214
'checker_command' attribute and *not* the 'checker'
279
215
attribute."""
280
216
self.name = name
281
if config is None:
282
config = {}
283
217
logger.debug(u"Creating client %r", self.name)
284
218
# Uppercase and remove spaces from fingerprint for later
285
219
# comparison purposes with return value from the fingerprint()
286
220
# function
287
self.fingerprint = (config[u"fingerprint"].upper()
288
.replace(u" ", u""))
221
self.fingerprint = config["fingerprint"].upper()\
222
.replace(u" ", u"")
289
223
logger.debug(u" Fingerprint: %s", self.fingerprint)
290
if u"secret" in config:
291
self.secret = config[u"secret"].decode(u"base64")
292
elif u"secfile" in config:
293
with closing(open(os.path.expanduser
294
(os.path.expandvars
295
(config[u"secfile"])))) as secfile:
296
self.secret = secfile.read()
224
if "secret" in config:
225
self.secret = config["secret"].decode(u"base64")
226
elif "secfile" in config:
227
sf = open(config["secfile"])
228
self.secret = sf.read()
229
sf.close()
297
230
else:
298
231
raise TypeError(u"No secret or secfile for client %s"
299
232
% self.name)
300
self.host = config.get(u"host", u"")
301
self.created = datetime.datetime.utcnow()
302
self.enabled = False
303
self.last_enabled = None
233
self.fqdn = config.get("fqdn", "")
234
self.created = datetime.datetime.now()
304
235
self.last_checked_ok = None
305
self.timeout = string_to_delta(config[u"timeout"])
306
self.interval = string_to_delta(config[u"interval"])
307
self.disable_hook = disable_hook
236
self.timeout = string_to_delta(config["timeout"])
237
self.interval = string_to_delta(config["interval"])
238
self.stop_hook = stop_hook
308
239
self.checker = None
309
240
self.checker_initiator_tag = None
310
self.disable_initiator_tag = None
241
self.stop_initiator_tag = None
311
242
self.checker_callback_tag = None
312
self.checker_command = config[u"checker"]
313
self.current_checker_command = None
314
self.last_connect = None
315
316
def enable(self):
243
self.check_command = config["checker"]
244
def start(self):
317
245
"""Start this client's checker and timeout hooks"""
318
if getattr(self, u"enabled", False):
319
# Already enabled
320
return
321
self.last_enabled = datetime.datetime.utcnow()
322
246
# Schedule a new checker to be started an 'interval' from now,
323
247
# and every interval from then on.
324
self.checker_initiator_tag = (gobject.timeout_add
325
(self.interval_milliseconds(),
326
self.start_checker))
248
self.checker_initiator_tag = gobject.timeout_add\
249
(self._interval_milliseconds,
250
self.start_checker)
327
251
# Also start a new checker *right now*.
328
252
self.start_checker()
329
# Schedule a disable() when 'timeout' has passed
330
self.disable_initiator_tag = (gobject.timeout_add
331
(self.timeout_milliseconds(),
332
self.disable))
333
self.enabled = True
334
335
def disable(self):
336
"""Disable this client."""
337
if not getattr(self, "enabled", False):
253
# Schedule a stop() when 'timeout' has passed
254
self.stop_initiator_tag = gobject.timeout_add\
255
(self._timeout_milliseconds,
256
self.stop)
257
def stop(self):
258
"""Stop this client.
259
The possibility that a client might be restarted is left open,
260
but not currently used."""
261
# If this client doesn't have a secret, it is already stopped.
262
if self.secret:
263
logger.info(u"Stopping client %s", self.name)
264
self.secret = None
265
else:
338
266
return False
339
logger.info(u"Disabling client %s", self.name)
340
if getattr(self, u"disable_initiator_tag", False):
341
gobject.source_remove(self.disable_initiator_tag)
342
self.disable_initiator_tag = None
343
if getattr(self, u"checker_initiator_tag", False):
267
if getattr(self, "stop_initiator_tag", False):
268
gobject.source_remove(self.stop_initiator_tag)
269
self.stop_initiator_tag = None
270
if getattr(self, "checker_initiator_tag", False):
344
271
gobject.source_remove(self.checker_initiator_tag)
345
272
self.checker_initiator_tag = None
346
273
self.stop_checker()
347
if self.disable_hook:
348
self.disable_hook(self)
349
self.enabled = False
274
if self.stop_hook:
275
self.stop_hook(self)
350
276
# Do not run this again if called by a gobject.timeout_add
351
277
return False
352
353
278
def __del__(self):
354
self.disable_hook = None
355
self.disable()
356
357
def checker_callback(self, pid, condition, command):
279
self.stop_hook = None
280
self.stop()
281
def checker_callback(self, pid, condition):
358
282
"""The checker has completed, so take appropriate actions."""
283
now = datetime.datetime.now()
359
284
self.checker_callback_tag = None
360
285
self.checker = None
361
if os.WIFEXITED(condition):
362
exitstatus = os.WEXITSTATUS(condition)
363
if exitstatus == 0:
364
logger.info(u"Checker for %(name)s succeeded",
365
vars(self))
366
self.checked_ok()
367
else:
368
logger.info(u"Checker for %(name)s failed",
369
vars(self))
370
else:
286
if os.WIFEXITED(condition) \
287
and (os.WEXITSTATUS(condition) == 0):
288
logger.info(u"Checker for %(name)s succeeded",
289
vars(self))
290
self.last_checked_ok = now
291
gobject.source_remove(self.stop_initiator_tag)
292
self.stop_initiator_tag = gobject.timeout_add\
293
(self._timeout_milliseconds,
294
self.stop)
295
elif not os.WIFEXITED(condition):
371
296
logger.warning(u"Checker for %(name)s crashed?",
372
297
vars(self))
373
374
def checked_ok(self):
375
"""Bump up the timeout for this client.
376
377
This should only be called when the client has been seen,
378
alive and well.
379
"""
380
self.last_checked_ok = datetime.datetime.utcnow()
381
gobject.source_remove(self.disable_initiator_tag)
382
self.disable_initiator_tag = (gobject.timeout_add
383
(self.timeout_milliseconds(),
384
self.disable))
385
298
else:
299
logger.info(u"Checker for %(name)s failed",
300
vars(self))
386
301
def start_checker(self):
387
302
"""Start a new checker subprocess if one is not running.
388
389
303
If a checker already exists, leave it running and do
390
304
nothing."""
391
305
# The reason for not killing a running checker is that if we
396
310
# checkers alone, the checker would have to take more time
397
311
# than 'timeout' for the client to be declared invalid, which
398
312
# is as it should be.
399
400
# If a checker exists, make sure it is not a zombie
401
if self.checker is not None:
402
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
403
if pid:
404
logger.warning(u"Checker was a zombie")
405
gobject.source_remove(self.checker_callback_tag)
406
self.checker_callback(pid, status,
407
self.current_checker_command)
408
# Start a new checker if needed
409
313
if self.checker is None:
410
314
try:
411
# In case checker_command has exactly one % operator
412
command = self.checker_command % self.host
315
# In case check_command has exactly one % operator
316
command = self.check_command % self.fqdn
413
317
except TypeError:
414
318
# Escape attributes for the shell
415
escaped_attrs = dict((key,
416
re.escape(unicode(str(val),
417
errors=
418
u'replace')))
319
escaped_attrs = dict((key, re.escape(str(val)))
419
320
for key, val in
420
321
vars(self).iteritems())
421
322
try:
422
command = self.checker_command % escaped_attrs
323
command = self.check_command % escaped_attrs
423
324
except TypeError, error:
424
325
logger.error(u'Could not format string "%s":'
425
u' %s', self.checker_command, error)
326
u' %s', self.check_command, error)
426
327
return True # Try again later
427
self.current_checker_command = command
428
328
try:
429
329
logger.info(u"Starting checker %r for %s",
430
330
command, self.name)
431
# We don't need to redirect stdout and stderr, since
432
# in normal mode, that is already done by daemon(),
433
# and in debug mode we don't want to. (Stdin is
434
# always replaced by /dev/null.)
435
331
self.checker = subprocess.Popen(command,
436
332
close_fds=True,
437
shell=True, cwd=u"/")
438
self.checker_callback_tag = (gobject.child_watch_add
439
(self.checker.pid,
440
self.checker_callback,
441
data=command))
442
# The checker may have completed before the gobject
443
# watch was added. Check for this.
444
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
445
if pid:
446
gobject.source_remove(self.checker_callback_tag)
447
self.checker_callback(pid, status, command)
448
except OSError, error:
333
shell=True, cwd="/")
334
self.checker_callback_tag = gobject.child_watch_add\
335
(self.checker.pid,
336
self.checker_callback)
337
except subprocess.OSError, error:
449
338
logger.error(u"Failed to start subprocess: %s",
450
339
error)
451
340
# Re-run this periodically if run by gobject.timeout_add
452
341
return True
453
454
342
def stop_checker(self):
455
343
"""Force the checker process, if any, to stop."""
456
344
if self.checker_callback_tag:
457
345
gobject.source_remove(self.checker_callback_tag)
458
346
self.checker_callback_tag = None
459
if getattr(self, u"checker", None) is None:
347
if getattr(self, "checker", None) is None:
460
348
return
461
logger.debug(u"Stopping checker for %(name)s", vars(self))
349
logger.debug("Stopping checker for %(name)s", vars(self))
462
350
try:
463
351
os.kill(self.checker.pid, signal.SIGTERM)
464
352
#os.sleep(0.5)
468
356
if error.errno != errno.ESRCH: # No such process
469
357
raise
470
358
self.checker = None
471
472
359
def still_valid(self):
473
360
"""Has the timeout not yet passed for this client?"""
474
if not getattr(self, u"enabled", False):
475
return False
476
now = datetime.datetime.utcnow()
361
now = datetime.datetime.now()
477
362
if self.last_checked_ok is None:
478
363
return now < (self.created + self.timeout)
479
364
else:
480
365
return now < (self.last_checked_ok + self.timeout)
481
366
482
367
483
def dbus_service_property(dbus_interface, signature=u"v",
484
access=u"readwrite", byte_arrays=False):
485
"""Decorators for marking methods of a DBusObjectWithProperties to
486
become properties on the D-Bus.
487
488
The decorated method will be called with no arguments by "Get"
489
and with one argument by "Set".
490
491
The parameters, where they are supported, are the same as
492
dbus.service.method, except there is only "signature", since the
493
type from Get() and the type sent to Set() is the same.
494
"""
495
def decorator(func):
496
func._dbus_is_property = True
497
func._dbus_interface = dbus_interface
498
func._dbus_signature = signature
499
func._dbus_access = access
500
func._dbus_name = func.__name__
501
if func._dbus_name.endswith(u"_dbus_property"):
502
func._dbus_name = func._dbus_name[:-14]
503
func._dbus_get_args_options = {u'byte_arrays': byte_arrays }
504
return func
505
return decorator
506
507
508
class DBusPropertyException(dbus.exceptions.DBusException):
509
"""A base class for D-Bus property-related exceptions
510
"""
511
def __unicode__(self):
512
return unicode(str(self))
513
514
515
class DBusPropertyAccessException(DBusPropertyException):
516
"""A property's access permissions disallows an operation.
517
"""
518
pass
519
520
521
class DBusPropertyNotFound(DBusPropertyException):
522
"""An attempt was made to access a non-existing property.
523
"""
524
pass
525
526
527
class DBusObjectWithProperties(dbus.service.Object):
528
"""A D-Bus object with properties.
529
530
Classes inheriting from this can use the dbus_service_property
531
decorator to expose methods as D-Bus properties. It exposes the
532
standard Get(), Set(), and GetAll() methods on the D-Bus.
533
"""
534
535
@staticmethod
536
def _is_dbus_property(obj):
537
return getattr(obj, u"_dbus_is_property", False)
538
539
def _get_all_dbus_properties(self):
540
"""Returns a generator of (name, attribute) pairs
541
"""
542
return ((prop._dbus_name, prop)
543
for name, prop in
544
inspect.getmembers(self, self._is_dbus_property))
545
546
def _get_dbus_property(self, interface_name, property_name):
547
"""Returns a bound method if one exists which is a D-Bus
548
property with the specified name and interface.
549
"""
550
for name in (property_name,
551
property_name + u"_dbus_property"):
552
prop = getattr(self, name, None)
553
if (prop is None
554
or not self._is_dbus_property(prop)
555
or prop._dbus_name != property_name
556
or (interface_name and prop._dbus_interface
557
and interface_name != prop._dbus_interface)):
558
continue
559
return prop
560
# No such property
561
raise DBusPropertyNotFound(self.dbus_object_path + u":"
562
+ interface_name + u"."
563
+ property_name)
564
565
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ss",
566
out_signature=u"v")
567
def Get(self, interface_name, property_name):
568
"""Standard D-Bus property Get() method, see D-Bus standard.
569
"""
570
prop = self._get_dbus_property(interface_name, property_name)
571
if prop._dbus_access == u"write":
572
raise DBusPropertyAccessException(property_name)
573
value = prop()
574
if not hasattr(value, u"variant_level"):
575
return value
576
return type(value)(value, variant_level=value.variant_level+1)
577
578
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ssv")
579
def Set(self, interface_name, property_name, value):
580
"""Standard D-Bus property Set() method, see D-Bus standard.
581
"""
582
prop = self._get_dbus_property(interface_name, property_name)
583
if prop._dbus_access == u"read":
584
raise DBusPropertyAccessException(property_name)
585
if prop._dbus_get_args_options[u"byte_arrays"]:
586
value = dbus.ByteArray(''.join(unichr(byte)
587
for byte in value))
588
prop(value)
589
590
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"s",
591
out_signature=u"a{sv}")
592
def GetAll(self, interface_name):
593
"""Standard D-Bus property GetAll() method, see D-Bus
594
standard.
595
596
Note: Will not include properties with access="write".
597
"""
598
all = {}
599
for name, prop in self._get_all_dbus_properties():
600
if (interface_name
601
and interface_name != prop._dbus_interface):
602
# Interface non-empty but did not match
603
continue
604
# Ignore write-only properties
605
if prop._dbus_access == u"write":
606
continue
607
value = prop()
608
if not hasattr(value, u"variant_level"):
609
all[name] = value
610
continue
611
all[name] = type(value)(value, variant_level=
612
value.variant_level+1)
613
return dbus.Dictionary(all, signature=u"sv")
614
615
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
616
out_signature=u"s",
617
path_keyword='object_path',
618
connection_keyword='connection')
619
def Introspect(self, object_path, connection):
620
"""Standard D-Bus method, overloaded to insert property tags.
621
"""
622
xmlstring = dbus.service.Object.Introspect(self, object_path,
623
connection)
624
document = xml.dom.minidom.parseString(xmlstring)
625
del xmlstring
626
def make_tag(document, name, prop):
627
e = document.createElement(u"property")
628
e.setAttribute(u"name", name)
629
e.setAttribute(u"type", prop._dbus_signature)
630
e.setAttribute(u"access", prop._dbus_access)
631
return e
632
for if_tag in document.getElementsByTagName(u"interface"):
633
for tag in (make_tag(document, name, prop)
634
for name, prop
635
in self._get_all_dbus_properties()
636
if prop._dbus_interface
637
== if_tag.getAttribute(u"name")):
638
if_tag.appendChild(tag)
639
xmlstring = document.toxml(u"utf-8")
640
document.unlink()
641
return xmlstring
642
643
644
class ClientDBus(Client, DBusObjectWithProperties):
645
"""A Client class using D-Bus
646
647
Attributes:
648
dbus_object_path: dbus.ObjectPath
649
bus: dbus.SystemBus()
650
"""
651
# dbus.service.Object doesn't use super(), so we can't either.
652
653
def __init__(self, bus = None, *args, **kwargs):
654
self.bus = bus
655
Client.__init__(self, *args, **kwargs)
656
# Only now, when this client is initialized, can it show up on
657
# the D-Bus
658
self.dbus_object_path = (dbus.ObjectPath
659
(u"/clients/"
660
+ self.name.replace(u".", u"_")))
661
DBusObjectWithProperties.__init__(self, self.bus,
662
self.dbus_object_path)
663
664
@staticmethod
665
def _datetime_to_dbus(dt, variant_level=0):
666
"""Convert a UTC datetime.datetime() to a D-Bus type."""
667
return dbus.String(dt.isoformat(),
668
variant_level=variant_level)
669
670
def enable(self):
671
oldstate = getattr(self, u"enabled", False)
672
r = Client.enable(self)
673
if oldstate != self.enabled:
674
# Emit D-Bus signals
675
self.PropertyChanged(dbus.String(u"enabled"),
676
dbus.Boolean(True, variant_level=1))
677
self.PropertyChanged(
678
dbus.String(u"last_enabled"),
679
self._datetime_to_dbus(self.last_enabled,
680
variant_level=1))
681
return r
682
683
def disable(self, signal = True):
684
oldstate = getattr(self, u"enabled", False)
685
r = Client.disable(self)
686
if signal and oldstate != self.enabled:
687
# Emit D-Bus signal
688
self.PropertyChanged(dbus.String(u"enabled"),
689
dbus.Boolean(False, variant_level=1))
690
return r
691
692
def __del__(self, *args, **kwargs):
693
try:
694
self.remove_from_connection()
695
except LookupError:
696
pass
697
if hasattr(DBusObjectWithProperties, u"__del__"):
698
DBusObjectWithProperties.__del__(self, *args, **kwargs)
699
Client.__del__(self, *args, **kwargs)
700
701
def checker_callback(self, pid, condition, command,
702
*args, **kwargs):
703
self.checker_callback_tag = None
704
self.checker = None
705
# Emit D-Bus signal
706
self.PropertyChanged(dbus.String(u"checker_running"),
707
dbus.Boolean(False, variant_level=1))
708
if os.WIFEXITED(condition):
709
exitstatus = os.WEXITSTATUS(condition)
710
# Emit D-Bus signal
711
self.CheckerCompleted(dbus.Int16(exitstatus),
712
dbus.Int64(condition),
713
dbus.String(command))
714
else:
715
# Emit D-Bus signal
716
self.CheckerCompleted(dbus.Int16(-1),
717
dbus.Int64(condition),
718
dbus.String(command))
719
720
return Client.checker_callback(self, pid, condition, command,
721
*args, **kwargs)
722
723
def checked_ok(self, *args, **kwargs):
724
r = Client.checked_ok(self, *args, **kwargs)
725
# Emit D-Bus signal
726
self.PropertyChanged(
727
dbus.String(u"last_checked_ok"),
728
(self._datetime_to_dbus(self.last_checked_ok,
729
variant_level=1)))
730
return r
731
732
def start_checker(self, *args, **kwargs):
733
old_checker = self.checker
734
if self.checker is not None:
735
old_checker_pid = self.checker.pid
736
else:
737
old_checker_pid = None
738
r = Client.start_checker(self, *args, **kwargs)
739
# Only if new checker process was started
740
if (self.checker is not None
741
and old_checker_pid != self.checker.pid):
742
# Emit D-Bus signal
743
self.CheckerStarted(self.current_checker_command)
744
self.PropertyChanged(
745
dbus.String(u"checker_running"),
746
dbus.Boolean(True, variant_level=1))
747
return r
748
749
def stop_checker(self, *args, **kwargs):
750
old_checker = getattr(self, u"checker", None)
751
r = Client.stop_checker(self, *args, **kwargs)
752
if (old_checker is not None
753
and getattr(self, u"checker", None) is None):
754
self.PropertyChanged(dbus.String(u"checker_running"),
755
dbus.Boolean(False, variant_level=1))
756
return r
757
758
## D-Bus methods & signals
759
_interface = u"se.bsnet.fukt.Mandos.Client"
760
761
# CheckedOK - method
762
@dbus.service.method(_interface)
763
def CheckedOK(self):
764
return self.checked_ok()
765
766
# CheckerCompleted - signal
767
@dbus.service.signal(_interface, signature=u"nxs")
768
def CheckerCompleted(self, exitcode, waitstatus, command):
769
"D-Bus signal"
770
pass
771
772
# CheckerStarted - signal
773
@dbus.service.signal(_interface, signature=u"s")
774
def CheckerStarted(self, command):
775
"D-Bus signal"
776
pass
777
778
# PropertyChanged - signal
779
@dbus.service.signal(_interface, signature=u"sv")
780
def PropertyChanged(self, property, value):
781
"D-Bus signal"
782
pass
783
784
# ReceivedSecret - signal
785
@dbus.service.signal(_interface)
786
def ReceivedSecret(self):
787
"D-Bus signal"
788
pass
789
790
# Rejected - signal
791
@dbus.service.signal(_interface)
792
def Rejected(self):
793
"D-Bus signal"
794
pass
795
796
# Enable - method
797
@dbus.service.method(_interface)
798
def Enable(self):
799
"D-Bus method"
800
self.enable()
801
802
# StartChecker - method
803
@dbus.service.method(_interface)
804
def StartChecker(self):
805
"D-Bus method"
806
self.start_checker()
807
808
# Disable - method
809
@dbus.service.method(_interface)
810
def Disable(self):
811
"D-Bus method"
812
self.disable()
813
814
# StopChecker - method
815
@dbus.service.method(_interface)
816
def StopChecker(self):
817
self.stop_checker()
818
819
# name - property
820
@dbus_service_property(_interface, signature=u"s", access=u"read")
821
def name_dbus_property(self):
822
return dbus.String(self.name)
823
824
# fingerprint - property
825
@dbus_service_property(_interface, signature=u"s", access=u"read")
826
def fingerprint_dbus_property(self):
827
return dbus.String(self.fingerprint)
828
829
# host - property
830
@dbus_service_property(_interface, signature=u"s",
831
access=u"readwrite")
832
def host_dbus_property(self, value=None):
833
if value is None: # get
834
return dbus.String(self.host)
835
self.host = value
836
# Emit D-Bus signal
837
self.PropertyChanged(dbus.String(u"host"),
838
dbus.String(value, variant_level=1))
839
840
# created - property
841
@dbus_service_property(_interface, signature=u"s", access=u"read")
842
def created_dbus_property(self):
843
return dbus.String(self._datetime_to_dbus(self.created))
844
845
# last_enabled - property
846
@dbus_service_property(_interface, signature=u"s", access=u"read")
847
def last_enabled_dbus_property(self):
848
if self.last_enabled is None:
849
return dbus.String(u"")
850
return dbus.String(self._datetime_to_dbus(self.last_enabled))
851
852
# enabled - property
853
@dbus_service_property(_interface, signature=u"b",
854
access=u"readwrite")
855
def enabled_dbus_property(self, value=None):
856
if value is None: # get
857
return dbus.Boolean(self.enabled)
858
if value:
859
self.enable()
860
else:
861
self.disable()
862
863
# last_checked_ok - property
864
@dbus_service_property(_interface, signature=u"s",
865
access=u"readwrite")
866
def last_checked_ok_dbus_property(self, value=None):
867
if value is not None:
868
self.checked_ok()
869
return
870
if self.last_checked_ok is None:
871
return dbus.String(u"")
872
return dbus.String(self._datetime_to_dbus(self
873
.last_checked_ok))
874
875
# timeout - property
876
@dbus_service_property(_interface, signature=u"t",
877
access=u"readwrite")
878
def timeout_dbus_property(self, value=None):
879
if value is None: # get
880
return dbus.UInt64(self.timeout_milliseconds())
881
self.timeout = datetime.timedelta(0, 0, 0, value)
882
# Emit D-Bus signal
883
self.PropertyChanged(dbus.String(u"timeout"),
884
dbus.UInt64(value, variant_level=1))
885
if getattr(self, u"disable_initiator_tag", None) is None:
886
return
887
# Reschedule timeout
888
gobject.source_remove(self.disable_initiator_tag)
889
self.disable_initiator_tag = None
890
time_to_die = (self.
891
_timedelta_to_milliseconds((self
892
.last_checked_ok
893
+ self.timeout)
894
- datetime.datetime
895
.utcnow()))
896
if time_to_die <= 0:
897
# The timeout has passed
898
self.disable()
899
else:
900
self.disable_initiator_tag = (gobject.timeout_add
901
(time_to_die, self.disable))
902
903
# interval - property
904
@dbus_service_property(_interface, signature=u"t",
905
access=u"readwrite")
906
def interval_dbus_property(self, value=None):
907
if value is None: # get
908
return dbus.UInt64(self.interval_milliseconds())
909
self.interval = datetime.timedelta(0, 0, 0, value)
910
# Emit D-Bus signal
911
self.PropertyChanged(dbus.String(u"interval"),
912
dbus.UInt64(value, variant_level=1))
913
if getattr(self, u"checker_initiator_tag", None) is None:
914
return
915
# Reschedule checker run
916
gobject.source_remove(self.checker_initiator_tag)
917
self.checker_initiator_tag = (gobject.timeout_add
918
(value, self.start_checker))
919
self.start_checker() # Start one now, too
920
921
# checker - property
922
@dbus_service_property(_interface, signature=u"s",
923
access=u"readwrite")
924
def checker_dbus_property(self, value=None):
925
if value is None: # get
926
return dbus.String(self.checker_command)
927
self.checker_command = value
928
# Emit D-Bus signal
929
self.PropertyChanged(dbus.String(u"checker"),
930
dbus.String(self.checker_command,
931
variant_level=1))
932
933
# checker_running - property
934
@dbus_service_property(_interface, signature=u"b",
935
access=u"readwrite")
936
def checker_running_dbus_property(self, value=None):
937
if value is None: # get
938
return dbus.Boolean(self.checker is not None)
939
if value:
940
self.start_checker()
941
else:
942
self.stop_checker()
943
944
# object_path - property
945
@dbus_service_property(_interface, signature=u"o", access=u"read")
946
def object_path_dbus_property(self):
947
return self.dbus_object_path # is already a dbus.ObjectPath
948
949
# secret = property
950
@dbus_service_property(_interface, signature=u"ay",
951
access=u"write", byte_arrays=True)
952
def secret_dbus_property(self, value):
953
self.secret = str(value)
954
955
del _interface
956
957
958
class ClientHandler(socketserver.BaseRequestHandler, object):
959
"""A class to handle client connections.
960
961
Instantiated once for each connection to handle it.
368
def peer_certificate(session):
369
"Return the peer's OpenPGP certificate as a bytestring"
370
# If not an OpenPGP certificate...
371
if gnutls.library.functions.gnutls_certificate_type_get\
372
(session._c_object) \
373
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP:
374
# ...do the normal thing
375
return session.peer_certificate
376
list_size = ctypes.c_uint()
377
cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
378
(session._c_object, ctypes.byref(list_size))
379
if list_size.value == 0:
380
return None
381
cert = cert_list[0]
382
return ctypes.string_at(cert.data, cert.size)
383
384
385
def fingerprint(openpgp):
386
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
387
# New GnuTLS "datum" with the OpenPGP public key
388
datum = gnutls.library.types.gnutls_datum_t\
389
(ctypes.cast(ctypes.c_char_p(openpgp),
390
ctypes.POINTER(ctypes.c_ubyte)),
391
ctypes.c_uint(len(openpgp)))
392
# New empty GnuTLS certificate
393
crt = gnutls.library.types.gnutls_openpgp_crt_t()
394
gnutls.library.functions.gnutls_openpgp_crt_init\
395
(ctypes.byref(crt))
396
# Import the OpenPGP public key into the certificate
397
gnutls.library.functions.gnutls_openpgp_crt_import\
398
(crt, ctypes.byref(datum),
399
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
400
# New buffer for the fingerprint
401
buffer = ctypes.create_string_buffer(20)
402
buffer_length = ctypes.c_size_t()
403
# Get the fingerprint from the certificate into the buffer
404
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
405
(crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
406
# Deinit the certificate
407
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
408
# Convert the buffer to a Python bytestring
409
fpr = ctypes.string_at(buffer, buffer_length.value)
410
# Convert the bytestring to hexadecimal notation
411
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
412
return hex_fpr
413
414
415
class tcp_handler(SocketServer.BaseRequestHandler, object):
416
"""A TCP request handler class.
417
Instantiated by IPv6_TCPServer for each request to handle it.
962
418
Note: This will run in its own forked process."""
963
419
964
420
def handle(self):
965
421
logger.info(u"TCP connection from: %s",
966
unicode(self.client_address))
967
logger.debug(u"IPC Pipe FD: %d", self.server.pipe[1])
968
# Open IPC pipe to parent process
969
with closing(os.fdopen(self.server.pipe[1], u"w", 1)) as ipc:
970
session = (gnutls.connection
971
.ClientSession(self.request,
972
gnutls.connection
973
.X509Credentials()))
974
975
line = self.request.makefile().readline()
976
logger.debug(u"Protocol version: %r", line)
977
try:
978
if int(line.strip().split()[0]) > 1:
979
raise RuntimeError
980
except (ValueError, IndexError, RuntimeError), error:
981
logger.error(u"Unknown protocol version: %s", error)
982
return
983
984
# Note: gnutls.connection.X509Credentials is really a
985
# generic GnuTLS certificate credentials object so long as
986
# no X.509 keys are added to it. Therefore, we can use it
987
# here despite using OpenPGP certificates.
988
989
#priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
990
# u"+AES-256-CBC", u"+SHA1",
991
# u"+COMP-NULL", u"+CTYPE-OPENPGP",
992
# u"+DHE-DSS"))
993
# Use a fallback default, since this MUST be set.
994
priority = self.server.gnutls_priority
995
if priority is None:
996
priority = u"NORMAL"
997
(gnutls.library.functions
998
.gnutls_priority_set_direct(session._c_object,
999
priority, None))
1000
1001
try:
1002
session.handshake()
1003
except gnutls.errors.GNUTLSError, error:
1004
logger.warning(u"Handshake failed: %s", error)
1005
# Do not run session.bye() here: the session is not
1006
# established. Just abandon the request.
1007
return
1008
logger.debug(u"Handshake succeeded")
1009
try:
1010
fpr = self.fingerprint(self.peer_certificate(session))
1011
except (TypeError, gnutls.errors.GNUTLSError), error:
1012
logger.warning(u"Bad certificate: %s", error)
1013
session.bye()
1014
return
1015
logger.debug(u"Fingerprint: %s", fpr)
1016
1017
for c in self.server.clients:
1018
if c.fingerprint == fpr:
1019
client = c
1020
break
1021
else:
1022
ipc.write(u"NOTFOUND %s %s\n"
1023
% (fpr, unicode(self.client_address)))
1024
session.bye()
1025
return
1026
# Have to check if client.still_valid(), since it is
1027
# possible that the client timed out while establishing
1028
# the GnuTLS session.
1029
if not client.still_valid():
1030
ipc.write(u"INVALID %s\n" % client.name)
1031
session.bye()
1032
return
1033
ipc.write(u"SENDING %s\n" % client.name)
1034
sent_size = 0
1035
while sent_size < len(client.secret):
1036
sent = session.send(client.secret[sent_size:])
1037
logger.debug(u"Sent: %d, remaining: %d",
1038
sent, len(client.secret)
1039
- (sent_size + sent))
1040
sent_size += sent
1041
session.bye()
1042
1043
@staticmethod
1044
def peer_certificate(session):
1045
"Return the peer's OpenPGP certificate as a bytestring"
1046
# If not an OpenPGP certificate...
1047
if (gnutls.library.functions
1048
.gnutls_certificate_type_get(session._c_object)
1049
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1050
# ...do the normal thing
1051
return session.peer_certificate
1052
list_size = ctypes.c_uint(1)
1053
cert_list = (gnutls.library.functions
1054
.gnutls_certificate_get_peers
1055
(session._c_object, ctypes.byref(list_size)))
1056
if not bool(cert_list) and list_size.value != 0:
1057
raise gnutls.errors.GNUTLSError(u"error getting peer"
1058
u" certificate")
1059
if list_size.value == 0:
1060
return None
1061
cert = cert_list[0]
1062
return ctypes.string_at(cert.data, cert.size)
1063
1064
@staticmethod
1065
def fingerprint(openpgp):
1066
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1067
# New GnuTLS "datum" with the OpenPGP public key
1068
datum = (gnutls.library.types
1069
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1070
ctypes.POINTER
1071
(ctypes.c_ubyte)),
1072
ctypes.c_uint(len(openpgp))))
1073
# New empty GnuTLS certificate
1074
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1075
(gnutls.library.functions
1076
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1077
# Import the OpenPGP public key into the certificate
1078
(gnutls.library.functions
1079
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1080
gnutls.library.constants
1081
.GNUTLS_OPENPGP_FMT_RAW))
1082
# Verify the self signature in the key
1083
crtverify = ctypes.c_uint()
1084
(gnutls.library.functions
1085
.gnutls_openpgp_crt_verify_self(crt, 0,
1086
ctypes.byref(crtverify)))
1087
if crtverify.value != 0:
1088
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1089
raise (gnutls.errors.CertificateSecurityError
1090
(u"Verify failed"))
1091
# New buffer for the fingerprint
1092
buf = ctypes.create_string_buffer(20)
1093
buf_len = ctypes.c_size_t()
1094
# Get the fingerprint from the certificate into the buffer
1095
(gnutls.library.functions
1096
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1097
ctypes.byref(buf_len)))
1098
# Deinit the certificate
1099
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1100
# Convert the buffer to a Python bytestring
1101
fpr = ctypes.string_at(buf, buf_len.value)
1102
# Convert the bytestring to hexadecimal notation
1103
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
1104
return hex_fpr
1105
1106
1107
class ForkingMixInWithPipe(socketserver.ForkingMixIn, object):
1108
"""Like socketserver.ForkingMixIn, but also pass a pipe."""
1109
def process_request(self, request, client_address):
1110
"""Overrides and wraps the original process_request().
1111
1112
This function creates a new pipe in self.pipe
1113
"""
1114
self.pipe = os.pipe()
1115
super(ForkingMixInWithPipe,
1116
self).process_request(request, client_address)
1117
os.close(self.pipe[1]) # close write end
1118
self.add_pipe(self.pipe[0])
1119
def add_pipe(self, pipe):
1120
"""Dummy function; override as necessary"""
1121
os.close(pipe)
1122
1123
1124
class IPv6_TCPServer(ForkingMixInWithPipe,
1125
socketserver.TCPServer, object):
1126
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1127
422
unicode(self.client_address))
423
session = gnutls.connection.ClientSession\
424
(self.request, gnutls.connection.X509Credentials())
425
426
line = self.request.makefile().readline()
427
logger.debug(u"Protocol version: %r", line)
428
try:
429
if int(line.strip().split()[0]) > 1:
430
raise RuntimeError
431
except (ValueError, IndexError, RuntimeError), error:
432
logger.error(u"Unknown protocol version: %s", error)
433
return
434
435
# Note: gnutls.connection.X509Credentials is really a generic
436
# GnuTLS certificate credentials object so long as no X.509
437
# keys are added to it. Therefore, we can use it here despite
438
# using OpenPGP certificates.
439
440
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
441
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
442
# "+DHE-DSS"))
443
priority = "NORMAL" # Fallback default, since this
444
# MUST be set.
445
if self.server.settings["priority"]:
446
priority = self.server.settings["priority"]
447
gnutls.library.functions.gnutls_priority_set_direct\
448
(session._c_object, priority, None);
449
450
try:
451
session.handshake()
452
except gnutls.errors.GNUTLSError, error:
453
logger.warning(u"Handshake failed: %s", error)
454
# Do not run session.bye() here: the session is not
455
# established. Just abandon the request.
456
return
457
try:
458
fpr = fingerprint(peer_certificate(session))
459
except (TypeError, gnutls.errors.GNUTLSError), error:
460
logger.warning(u"Bad certificate: %s", error)
461
session.bye()
462
return
463
logger.debug(u"Fingerprint: %s", fpr)
464
client = None
465
for c in self.server.clients:
466
if c.fingerprint == fpr:
467
client = c
468
break
469
if not client:
470
logger.warning(u"Client not found for fingerprint: %s",
471
fpr)
472
session.bye()
473
return
474
# Have to check if client.still_valid(), since it is possible
475
# that the client timed out while establishing the GnuTLS
476
# session.
477
if not client.still_valid():
478
logger.warning(u"Client %(name)s is invalid",
479
vars(client))
480
session.bye()
481
return
482
sent_size = 0
483
while sent_size < len(client.secret):
484
sent = session.send(client.secret[sent_size:])
485
logger.debug(u"Sent: %d, remaining: %d",
486
sent, len(client.secret)
487
- (sent_size + sent))
488
sent_size += sent
489
session.bye()
490
491
492
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
493
"""IPv6 TCP server. Accepts 'None' as address and/or port.
1128
494
Attributes:
1129
enabled: Boolean; whether this server is activated yet
1130
interface: None or a network interface name (string)
1131
use_ipv6: Boolean; to use IPv6 or not
495
settings: Server settings
496
clients: Set() of Client objects
1132
497
"""
1133
def __init__(self, server_address, RequestHandlerClass,
1134
interface=None, use_ipv6=True):
1135
self.interface = interface
1136
if use_ipv6:
1137
self.address_family = socket.AF_INET6
1138
socketserver.TCPServer.__init__(self, server_address,
1139
RequestHandlerClass)
498
address_family = socket.AF_INET6
499
def __init__(self, *args, **kwargs):
500
if "settings" in kwargs:
501
self.settings = kwargs["settings"]
502
del kwargs["settings"]
503
if "clients" in kwargs:
504
self.clients = kwargs["clients"]
505
del kwargs["clients"]
506
return super(type(self), self).__init__(*args, **kwargs)
1140
507
def server_bind(self):
1141
508
"""This overrides the normal server_bind() function
1142
509
to bind to an interface if one was specified, and also NOT to
1143
510
bind to an address or port if they were not specified."""
1144
if self.interface is not None:
1145
if SO_BINDTODEVICE is None:
1146
logger.error(u"SO_BINDTODEVICE does not exist;"
1147
u" cannot bind to interface %s",
1148
self.interface)
1149
else:
1150
try:
1151
self.socket.setsockopt(socket.SOL_SOCKET,
1152
SO_BINDTODEVICE,
1153
str(self.interface
1154
+ u'\0'))
1155
except socket.error, error:
1156
if error[0] == errno.EPERM:
1157
logger.error(u"No permission to"
1158
u" bind to interface %s",
1159
self.interface)
1160
elif error[0] == errno.ENOPROTOOPT:
1161
logger.error(u"SO_BINDTODEVICE not available;"
1162
u" cannot bind to interface %s",
1163
self.interface)
1164
else:
1165
raise
511
if self.settings["interface"]:
512
# 25 is from /usr/include/asm-i486/socket.h
513
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
514
try:
515
self.socket.setsockopt(socket.SOL_SOCKET,
516
SO_BINDTODEVICE,
517
self.settings["interface"])
518
except socket.error, error:
519
if error[0] == errno.EPERM:
520
logger.error(u"No permission to"
521
u" bind to interface %s",
522
self.settings["interface"])
523
else:
524
raise error
1166
525
# Only bind(2) the socket if we really need to.
1167
526
if self.server_address[0] or self.server_address[1]:
1168
527
if not self.server_address[0]:
1169
if self.address_family == socket.AF_INET6:
1170
any_address = u"::" # in6addr_any
1171
else:
1172
any_address = socket.INADDR_ANY
1173
self.server_address = (any_address,
528
in6addr_any = "::"
529
self.server_address = (in6addr_any,
1174
530
self.server_address[1])
1175
elif not self.server_address[1]:
531
elif self.server_address[1] is None:
1176
532
self.server_address = (self.server_address[0],
1177
533
0)
1178
# if self.interface:
1179
# self.server_address = (self.server_address[0],
1180
# 0, # port
1181
# 0, # flowinfo
1182
# if_nametoindex
1183
# (self.interface))
1184
return socketserver.TCPServer.server_bind(self)
1185
1186
1187
class MandosServer(IPv6_TCPServer):
1188
"""Mandos server.
1189
1190
Attributes:
1191
clients: set of Client objects
1192
gnutls_priority GnuTLS priority string
1193
use_dbus: Boolean; to emit D-Bus signals or not
1194
1195
Assumes a gobject.MainLoop event loop.
1196
"""
1197
def __init__(self, server_address, RequestHandlerClass,
1198
interface=None, use_ipv6=True, clients=None,
1199
gnutls_priority=None, use_dbus=True):
1200
self.enabled = False
1201
self.clients = clients
1202
if self.clients is None:
1203
self.clients = set()
1204
self.use_dbus = use_dbus
1205
self.gnutls_priority = gnutls_priority
1206
IPv6_TCPServer.__init__(self, server_address,
1207
RequestHandlerClass,
1208
interface = interface,
1209
use_ipv6 = use_ipv6)
1210
def server_activate(self):
1211
if self.enabled:
1212
return socketserver.TCPServer.server_activate(self)
1213
def enable(self):
1214
self.enabled = True
1215
def add_pipe(self, pipe):
1216
# Call "handle_ipc" for both data and EOF events
1217
gobject.io_add_watch(pipe, gobject.IO_IN | gobject.IO_HUP,
1218
self.handle_ipc)
1219
def handle_ipc(self, source, condition, file_objects={}):
1220
condition_names = {
1221
gobject.IO_IN: u"IN", # There is data to read.
1222
gobject.IO_OUT: u"OUT", # Data can be written (without
1223
# blocking).
1224
gobject.IO_PRI: u"PRI", # There is urgent data to read.
1225
gobject.IO_ERR: u"ERR", # Error condition.
1226
gobject.IO_HUP: u"HUP" # Hung up (the connection has been
1227
# broken, usually for pipes and
1228
# sockets).
1229
}
1230
conditions_string = ' | '.join(name
1231
for cond, name in
1232
condition_names.iteritems()
1233
if cond & condition)
1234
logger.debug(u"Handling IPC: FD = %d, condition = %s", source,
1235
conditions_string)
1236
1237
# Turn the pipe file descriptor into a Python file object
1238
if source not in file_objects:
1239
file_objects[source] = os.fdopen(source, u"r", 1)
1240
1241
# Read a line from the file object
1242
cmdline = file_objects[source].readline()
1243
if not cmdline: # Empty line means end of file
1244
# close the IPC pipe
1245
file_objects[source].close()
1246
del file_objects[source]
1247
1248
# Stop calling this function
1249
return False
1250
1251
logger.debug(u"IPC command: %r", cmdline)
1252
1253
# Parse and act on command
1254
cmd, args = cmdline.rstrip(u"\r\n").split(None, 1)
1255
1256
if cmd == u"NOTFOUND":
1257
logger.warning(u"Client not found for fingerprint: %s",
1258
args)
1259
if self.use_dbus:
1260
# Emit D-Bus signal
1261
mandos_dbus_service.ClientNotFound(args)
1262
elif cmd == u"INVALID":
1263
for client in self.clients:
1264
if client.name == args:
1265
logger.warning(u"Client %s is invalid", args)
1266
if self.use_dbus:
1267
# Emit D-Bus signal
1268
client.Rejected()
1269
break
1270
else:
1271
logger.error(u"Unknown client %s is invalid", args)
1272
elif cmd == u"SENDING":
1273
for client in self.clients:
1274
if client.name == args:
1275
logger.info(u"Sending secret to %s", client.name)
1276
client.checked_ok()
1277
if self.use_dbus:
1278
# Emit D-Bus signal
1279
client.ReceivedSecret()
1280
break
1281
else:
1282
logger.error(u"Sending secret to unknown client %s",
1283
args)
1284
else:
1285
logger.error(u"Unknown IPC command: %r", cmdline)
1286
1287
# Keep calling this function
1288
return True
534
return super(type(self), self).server_bind()
1289
535
1290
536
1291
537
def string_to_delta(interval):
1292
538
"""Parse a string and return a datetime.timedelta
1293
1294
>>> string_to_delta(u'7d')
539
540
>>> string_to_delta('7d')
1295
541
datetime.timedelta(7)
1296
>>> string_to_delta(u'60s')
542
>>> string_to_delta('60s')
1297
543
datetime.timedelta(0, 60)
1298
>>> string_to_delta(u'60m')
544
>>> string_to_delta('60m')
1299
545
datetime.timedelta(0, 3600)
1300
>>> string_to_delta(u'24h')
546
>>> string_to_delta('24h')
1301
547
datetime.timedelta(1)
1302
548
>>> string_to_delta(u'1w')
1303
549
datetime.timedelta(7)
1304
>>> string_to_delta(u'5m 30s')
1305
datetime.timedelta(0, 330)
1306
550
"""
1307
timevalue = datetime.timedelta(0)
1308
for s in interval.split():
1309
try:
1310
suffix = unicode(s[-1])
1311
value = int(s[:-1])
1312
if suffix == u"d":
1313
delta = datetime.timedelta(value)
1314
elif suffix == u"s":
1315
delta = datetime.timedelta(0, value)
1316
elif suffix == u"m":
1317
delta = datetime.timedelta(0, 0, 0, 0, value)
1318
elif suffix == u"h":
1319
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
1320
elif suffix == u"w":
1321
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1322
else:
1323
raise ValueError
1324
except (ValueError, IndexError):
551
try:
552
suffix=unicode(interval[-1])
553
value=int(interval[:-1])
554
if suffix == u"d":
555
delta = datetime.timedelta(value)
556
elif suffix == u"s":
557
delta = datetime.timedelta(0, value)
558
elif suffix == u"m":
559
delta = datetime.timedelta(0, 0, 0, 0, value)
560
elif suffix == u"h":
561
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
562
elif suffix == u"w":
563
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
564
else:
1325
565
raise ValueError
1326
timevalue += delta
1327
return timevalue
1328
566
except (ValueError, IndexError):
567
raise ValueError
568
return delta
569
570
571
def server_state_changed(state):
572
"""Derived from the Avahi example code"""
573
if state == avahi.SERVER_COLLISION:
574
logger.error(u"Server name collision")
575
service.remove()
576
elif state == avahi.SERVER_RUNNING:
577
service.add()
578
579
580
def entry_group_state_changed(state, error):
581
"""Derived from the Avahi example code"""
582
logger.debug(u"state change: %i", state)
583
584
if state == avahi.ENTRY_GROUP_ESTABLISHED:
585
logger.debug(u"Service established.")
586
elif state == avahi.ENTRY_GROUP_COLLISION:
587
logger.warning(u"Service name collision.")
588
service.rename()
589
elif state == avahi.ENTRY_GROUP_FAILURE:
590
logger.critical(u"Error in group state changed %s",
591
unicode(error))
592
raise AvahiGroupError("State changed: %s", str(error))
1329
593
1330
594
def if_nametoindex(interface):
1331
"""Call the C function if_nametoindex(), or equivalent
1332
1333
Note: This function cannot accept a unicode string."""
595
"""Call the C function if_nametoindex(), or equivalent"""
1334
596
global if_nametoindex
1335
597
try:
1336
if_nametoindex = (ctypes.cdll.LoadLibrary
1337
(ctypes.util.find_library(u"c"))
1338
.if_nametoindex)
598
if "ctypes.util" not in sys.modules:
599
import ctypes.util
600
if_nametoindex = ctypes.cdll.LoadLibrary\
601
(ctypes.util.find_library("c")).if_nametoindex
1339
602
except (OSError, AttributeError):
1340
logger.warning(u"Doing if_nametoindex the hard way")
603
if "struct" not in sys.modules:
604
import struct
605
if "fcntl" not in sys.modules:
606
import fcntl
1341
607
def if_nametoindex(interface):
1342
608
"Get an interface index the hard way, i.e. using fcntl()"
1343
609
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1344
with closing(socket.socket()) as s:
1345
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1346
struct.pack(str(u"16s16x"),
1347
interface))
1348
interface_index = struct.unpack(str(u"I"),
1349
ifreq[16:20])[0]
610
s = socket.socket()
611
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
612
struct.pack("16s16x", interface))
613
s.close()
614
interface_index = struct.unpack("I", ifreq[16:20])[0]
1350
615
return interface_index
1351
616
return if_nametoindex(interface)
1352
617
1353
618
1354
619
def daemon(nochdir = False, noclose = False):
1355
620
"""See daemon(3). Standard BSD Unix function.
1356
1357
621
This should really exist as os.daemon, but it doesn't (yet)."""
1358
622
if os.fork():
1359
623
sys.exit()
1360
624
os.setsid()
1361
625
if not nochdir:
1362
os.chdir(u"/")
626
os.chdir("/")
1363
627
if os.fork():
1364
628
sys.exit()
1365
629
if not noclose:
1367
631
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1368
632
if not stat.S_ISCHR(os.fstat(null).st_mode):
1369
633
raise OSError(errno.ENODEV,
1370
u"/dev/null not a character device")
634
"/dev/null not a character device")
1371
635
os.dup2(null, sys.stdin.fileno())
1372
636
os.dup2(null, sys.stdout.fileno())
1373
637
os.dup2(null, sys.stderr.fileno())
1376
640
1377
641
1378
642
def main():
1379
1380
##################################################################
1381
# Parsing of options, both command line and config file
1382
1383
parser = optparse.OptionParser(version = "%%prog %s" % version)
1384
parser.add_option("-i", u"--interface", type=u"string",
1385
metavar="IF", help=u"Bind to interface IF")
1386
parser.add_option("-a", u"--address", type=u"string",
1387
help=u"Address to listen for requests on")
1388
parser.add_option("-p", u"--port", type=u"int",
1389
help=u"Port number to receive requests on")
1390
parser.add_option("--check", action=u"store_true",
1391
help=u"Run self-test")
1392
parser.add_option("--debug", action=u"store_true",
1393
help=u"Debug mode; run in foreground and log to"
1394
u" terminal")
1395
parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1396
u" priority string (see GnuTLS documentation)")
1397
parser.add_option("--servicename", type=u"string",
1398
metavar=u"NAME", help=u"Zeroconf service name")
1399
parser.add_option("--configdir", type=u"string",
1400
default=u"/etc/mandos", metavar=u"DIR",
1401
help=u"Directory to search for configuration"
1402
u" files")
1403
parser.add_option("--no-dbus", action=u"store_false",
1404
dest=u"use_dbus", help=u"Do not provide D-Bus"
1405
u" system bus interface")
1406
parser.add_option("--no-ipv6", action=u"store_false",
1407
dest=u"use_ipv6", help=u"Do not use IPv6")
1408
options = parser.parse_args()[0]
643
global main_loop_started
644
main_loop_started = False
645
646
parser = OptionParser()
647
parser.add_option("-i", "--interface", type="string",
648
metavar="IF", help="Bind to interface IF")
649
parser.add_option("-a", "--address", type="string",
650
help="Address to listen for requests on")
651
parser.add_option("-p", "--port", type="int",
652
help="Port number to receive requests on")
653
parser.add_option("--check", action="store_true", default=False,
654
help="Run self-test")
655
parser.add_option("--debug", action="store_true", default=False,
656
help="Debug mode; run in foreground and log to"
657
" terminal")
658
parser.add_option("--priority", type="string", help="GnuTLS"
659
" priority string (see GnuTLS documentation)")
660
parser.add_option("--servicename", type="string", metavar="NAME",
661
help="Zeroconf service name")
662
parser.add_option("--configdir", type="string",
663
default="/etc/mandos", metavar="DIR",
664
help="Directory to search for configuration"
665
" files")
666
(options, args) = parser.parse_args()
1409
667
1410
668
if options.check:
1411
669
import doctest
1413
671
sys.exit()
1414
672
1415
673
# Default values for config file for server-global settings
1416
server_defaults = { u"interface": u"",
1417
u"address": u"",
1418
u"port": u"",
1419
u"debug": u"False",
1420
u"priority":
1421
u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1422
u"servicename": u"Mandos",
1423
u"use_dbus": u"True",
1424
u"use_ipv6": u"True",
674
server_defaults = { "interface": "",
675
"address": "",
676
"port": "",
677
"debug": "False",
678
"priority":
679
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
680
"servicename": "Mandos",
1425
681
}
1426
682
1427
683
# Parse config file for server-global settings
1428
server_config = configparser.SafeConfigParser(server_defaults)
684
server_config = ConfigParser.SafeConfigParser(server_defaults)
1429
685
del server_defaults
1430
server_config.read(os.path.join(options.configdir,
1431
u"mandos.conf"))
686
server_config.read(os.path.join(options.configdir, "mandos.conf"))
687
server_section = "server"
1432
688
# Convert the SafeConfigParser object to a dict
1433
server_settings = server_config.defaults()
1434
# Use the appropriate methods on the non-string config options
1435
for option in (u"debug", u"use_dbus", u"use_ipv6"):
1436
server_settings[option] = server_config.getboolean(u"DEFAULT",
1437
option)
1438
if server_settings["port"]:
1439
server_settings["port"] = server_config.getint(u"DEFAULT",
1440
u"port")
689
server_settings = dict(server_config.items(server_section))
690
# Use getboolean on the boolean config option
691
server_settings["debug"] = server_config.getboolean\
692
(server_section, "debug")
1441
693
del server_config
1442
694
1443
695
# Override the settings from the config file with command line
1444
696
# options, if set.
1445
for option in (u"interface", u"address", u"port", u"debug",
1446
u"priority", u"servicename", u"configdir",
1447
u"use_dbus", u"use_ipv6"):
697
for option in ("interface", "address", "port", "debug",
698
"priority", "servicename", "configdir"):
1448
699
value = getattr(options, option)
1449
700
if value is not None:
1450
701
server_settings[option] = value
1451
702
del options
1452
# Force all strings to be unicode
1453
for option in server_settings.keys():
1454
if type(server_settings[option]) is str:
1455
server_settings[option] = unicode(server_settings[option])
1456
703
# Now we have our good server settings in "server_settings"
1457
704
1458
##################################################################
1459
1460
# For convenience
1461
debug = server_settings[u"debug"]
1462
use_dbus = server_settings[u"use_dbus"]
1463
use_ipv6 = server_settings[u"use_ipv6"]
1464
1465
if not debug:
1466
syslogger.setLevel(logging.WARNING)
1467
console.setLevel(logging.WARNING)
1468
1469
if server_settings[u"servicename"] != u"Mandos":
1470
syslogger.setFormatter(logging.Formatter
1471
(u'Mandos (%s) [%%(process)d]:'
1472
u' %%(levelname)s: %%(message)s'
1473
% server_settings[u"servicename"]))
1474
1475
705
# Parse config file with clients
1476
client_defaults = { u"timeout": u"1h",
1477
u"interval": u"5m",
1478
u"checker": u"fping -q -- %%(host)s",
1479
u"host": u"",
706
client_defaults = { "timeout": "1h",
707
"interval": "5m",
708
"checker": "fping -q -- %%(fqdn)s",
1480
709
}
1481
client_config = configparser.SafeConfigParser(client_defaults)
1482
client_config.read(os.path.join(server_settings[u"configdir"],
1483
u"clients.conf"))
1484
1485
global mandos_dbus_service
1486
mandos_dbus_service = None
1487
1488
tcp_server = MandosServer((server_settings[u"address"],
1489
server_settings[u"port"]),
1490
ClientHandler,
1491
interface=server_settings[u"interface"],
1492
use_ipv6=use_ipv6,
1493
gnutls_priority=
1494
server_settings[u"priority"],
1495
use_dbus=use_dbus)
1496
pidfilename = u"/var/run/mandos.pid"
1497
try:
1498
pidfile = open(pidfilename, u"w")
1499
except IOError:
1500
logger.error(u"Could not open file %r", pidfilename)
1501
1502
try:
1503
uid = pwd.getpwnam(u"_mandos").pw_uid
1504
gid = pwd.getpwnam(u"_mandos").pw_gid
1505
except KeyError:
1506
try:
1507
uid = pwd.getpwnam(u"mandos").pw_uid
1508
gid = pwd.getpwnam(u"mandos").pw_gid
1509
except KeyError:
1510
try:
1511
uid = pwd.getpwnam(u"nobody").pw_uid
1512
gid = pwd.getpwnam(u"nobody").pw_gid
1513
except KeyError:
1514
uid = 65534
1515
gid = 65534
1516
try:
1517
os.setgid(gid)
1518
os.setuid(uid)
1519
except OSError, error:
1520
if error[0] != errno.EPERM:
1521
raise error
1522
1523
# Enable all possible GnuTLS debugging
1524
if debug:
1525
# "Use a log level over 10 to enable all debugging options."
1526
# - GnuTLS manual
1527
gnutls.library.functions.gnutls_global_set_log_level(11)
1528
1529
@gnutls.library.types.gnutls_log_func
1530
def debug_gnutls(level, string):
1531
logger.debug(u"GnuTLS: %s", string[:-1])
1532
1533
(gnutls.library.functions
1534
.gnutls_global_set_log_function(debug_gnutls))
710
client_config = ConfigParser.SafeConfigParser(client_defaults)
711
client_config.read(os.path.join(server_settings["configdir"],
712
"clients.conf"))
713
714
global service
715
service = AvahiService(name = server_settings["servicename"],
716
type = "_mandos._tcp", );
717
if server_settings["interface"]:
718
service.interface = if_nametoindex(server_settings["interface"])
1535
719
1536
720
global main_loop
721
global bus
722
global server
1537
723
# From the Avahi example code
1538
724
DBusGMainLoop(set_as_default=True )
1539
725
main_loop = gobject.MainLoop()
1540
726
bus = dbus.SystemBus()
727
server = dbus.Interface(
728
bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
729
avahi.DBUS_INTERFACE_SERVER )
1541
730
# End of Avahi example code
1542
if use_dbus:
1543
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
1544
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1545
service = AvahiService(name = server_settings[u"servicename"],
1546
servicetype = u"_mandos._tcp",
1547
protocol = protocol, bus = bus)
1548
if server_settings["interface"]:
1549
service.interface = (if_nametoindex
1550
(str(server_settings[u"interface"])))
1551
731
1552
client_class = Client
1553
if use_dbus:
1554
client_class = functools.partial(ClientDBus, bus = bus)
1555
tcp_server.clients.update(set(
1556
client_class(name = section,
1557
config= dict(client_config.items(section)))
1558
for section in client_config.sections()))
1559
if not tcp_server.clients:
1560
logger.warning(u"No clients defined")
732
debug = server_settings["debug"]
1561
733
1562
734
if debug:
1563
# Redirect stdin so all checkers get /dev/null
1564
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1565
os.dup2(null, sys.stdin.fileno())
1566
if null > 2:
1567
os.close(null)
1568
else:
1569
# No console logging
1570
logger.removeHandler(console)
1571
# Close all input and output, do double fork, etc.
735
console = logging.StreamHandler()
736
# console.setLevel(logging.DEBUG)
737
console.setFormatter(logging.Formatter\
738
('%(levelname)s: %(message)s'))
739
logger.addHandler(console)
740
del console
741
742
clients = Set()
743
def remove_from_clients(client):
744
clients.remove(client)
745
if not clients:
746
logger.critical(u"No clients left, exiting")
747
sys.exit()
748
749
clients.update(Set(Client(name = section,
750
stop_hook = remove_from_clients,
751
config
752
= dict(client_config.items(section)))
753
for section in client_config.sections()))
754
755
if not debug:
1572
756
daemon()
1573
757
1574
try:
1575
with closing(pidfile):
1576
pid = os.getpid()
1577
pidfile.write(str(pid) + "\n")
1578
del pidfile
1579
except IOError:
1580
logger.error(u"Could not write to file %r with PID %d",
1581
pidfilename, pid)
1582
except NameError:
1583
# "pidfile" was never created
1584
pass
1585
del pidfilename
1586
1587
758
def cleanup():
1588
759
"Cleanup function; run on exit"
1589
service.cleanup()
760
global group
761
# From the Avahi example code
762
if not group is None:
763
group.Free()
764
group = None
765
# End of Avahi example code
1590
766
1591
while tcp_server.clients:
1592
client = tcp_server.clients.pop()
1593
client.disable_hook = None
1594
client.disable()
767
while clients:
768
client = clients.pop()
769
client.stop_hook = None
770
client.stop()
1595
771
1596
772
atexit.register(cleanup)
1597
773
1600
776
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1601
777
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1602
778
1603
if use_dbus:
1604
class MandosDBusService(dbus.service.Object):
1605
"""A D-Bus proxy object"""
1606
def __init__(self):
1607
dbus.service.Object.__init__(self, bus, u"/")
1608
_interface = u"se.bsnet.fukt.Mandos"
1609
1610
@dbus.service.signal(_interface, signature=u"oa{sv}")
1611
def ClientAdded(self, objpath, properties):
1612
"D-Bus signal"
1613
pass
1614
1615
@dbus.service.signal(_interface, signature=u"s")
1616
def ClientNotFound(self, fingerprint):
1617
"D-Bus signal"
1618
pass
1619
1620
@dbus.service.signal(_interface, signature=u"os")
1621
def ClientRemoved(self, objpath, name):
1622
"D-Bus signal"
1623
pass
1624
1625
@dbus.service.method(_interface, out_signature=u"ao")
1626
def GetAllClients(self):
1627
"D-Bus method"
1628
return dbus.Array(c.dbus_object_path
1629
for c in tcp_server.clients)
1630
1631
@dbus.service.method(_interface,
1632
out_signature=u"a{oa{sv}}")
1633
def GetAllClientsWithProperties(self):
1634
"D-Bus method"
1635
return dbus.Dictionary(
1636
((c.dbus_object_path, c.GetAll(u""))
1637
for c in tcp_server.clients),
1638
signature=u"oa{sv}")
1639
1640
@dbus.service.method(_interface, in_signature=u"o")
1641
def RemoveClient(self, object_path):
1642
"D-Bus method"
1643
for c in tcp_server.clients:
1644
if c.dbus_object_path == object_path:
1645
tcp_server.clients.remove(c)
1646
c.remove_from_connection()
1647
# Don't signal anything except ClientRemoved
1648
c.disable(signal=False)
1649
# Emit D-Bus signal
1650
self.ClientRemoved(object_path, c.name)
1651
return
1652
raise KeyError
1653
1654
del _interface
1655
1656
mandos_dbus_service = MandosDBusService()
1657
1658
for client in tcp_server.clients:
1659
if use_dbus:
1660
# Emit D-Bus signal
1661
mandos_dbus_service.ClientAdded(client.dbus_object_path,
1662
client.GetAll(u""))
1663
client.enable()
1664
1665
tcp_server.enable()
1666
tcp_server.server_activate()
1667
779
for client in clients:
780
client.start()
781
782
tcp_server = IPv6_TCPServer((server_settings["address"],
783
server_settings["port"]),
784
tcp_handler,
785
settings=server_settings,
786
clients=clients)
1668
787
# Find out what port we got
1669
788
service.port = tcp_server.socket.getsockname()[1]
1670
if use_ipv6:
1671
logger.info(u"Now listening on address %r, port %d,"
1672
" flowinfo %d, scope_id %d"
1673
% tcp_server.socket.getsockname())
1674
else: # IPv4
1675
logger.info(u"Now listening on address %r, port %d"
1676
% tcp_server.socket.getsockname())
789
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
790
u" scope_id %d" % tcp_server.socket.getsockname())
1677
791
1678
792
#service.interface = tcp_server.socket.getsockname()[3]
1679
793
1680
794
try:
1681
795
# From the Avahi example code
796
server.connect_to_signal("StateChanged", server_state_changed)
1682
797
try:
1683
service.activate()
798
server_state_changed(server.GetState())
1684
799
except dbus.exceptions.DBusException, error:
1685
800
logger.critical(u"DBusException: %s", error)
1686
801
sys.exit(1)
1688
803
1689
804
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
1690
805
lambda *args, **kwargs:
1691
(tcp_server.handle_request
1692
(*args[2:], **kwargs) or True))
806
tcp_server.handle_request\
807
(*args[2:], **kwargs) or True)
1693
808
1694
logger.debug(u"Starting main loop")
809
logger.debug("Starting main loop")
810
main_loop_started = True
1695
811
main_loop.run()
1696
812
except AvahiError, error:
1697
logger.critical(u"AvahiError: %s", error)
813
logger.critical(u"AvahiError: %s" + unicode(error))
1698
814
sys.exit(1)
1699
815
except KeyboardInterrupt:
1700
816
if debug:
1701
print >> sys.stderr
1702
logger.debug(u"Server received KeyboardInterrupt")
1703
logger.debug(u"Server exiting")
817
print
1704
818
1705
819
if __name__ == '__main__':
1706
820
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0