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- Committer: teddy at bsnet
- Date: 2010-09-09 18:16:14 UTC
- mfrom: (237.2.35 mandos-empty-device)
- Revision ID: teddy@fukt.bsnet.se-20100909181614-oanlmvkzsiodbo3c
Merge in branch to interpret an empty device name to mean
"autodetect".
"autodetect".
- files added:
- .bzr-builddeb
- debian
- debian/po
- files removed:
- plugins.d/usplash
- files renamed:
- plugins.d/password-request.c => plugins.d/mandos-client.c
- plugins.d/password-request.xml => plugins.d/mandos-client.xml
- 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" and "remove" in the "AvahiService" class, the
10
# "server_state_changed" and "entry_group_state_changed" functions,
11
# and some lines in "main".
9
# methods "add", "remove", "server_state_changed",
10
# "entry_group_state_changed", "cleanup", and "activate" in the
11
# "AvahiService" class, and some lines in "main".
12
12
#
13
13
# Everything else is
14
# Copyright © 2007-2008 Teddy Hogeborn & Björn Påhlsson
14
# Copyright © 2008,2009 Teddy Hogeborn
15
# Copyright © 2008,2009 Björn Påhlsson
15
16
#
16
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# This program is free software: you can redistribute it and/or modify
17
18
# it under the terms of the GNU General Public License as published by
24
25
# GNU General Public License for more details.
25
26
#
26
27
# You should have received a copy of the GNU General Public License
27
# along with this program. If not, see <http://www.gnu.org/licenses/>.
28
# along with this program. If not, see
29
# <http://www.gnu.org/licenses/>.
28
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#
29
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# Contact the authors at <mandos@fukt.bsnet.se>.
30
32
#
31
33
32
from __future__ import division
34
from __future__ import division, with_statement, absolute_import
33
35
34
import SocketServer
36
import SocketServer as socketserver
35
37
import socket
36
import select
37
from optparse import OptionParser
38
import optparse
38
39
import datetime
39
40
import errno
40
41
import gnutls.crypto
43
44
import gnutls.library.functions
44
45
import gnutls.library.constants
45
46
import gnutls.library.types
46
import ConfigParser
47
import ConfigParser as configparser
47
48
import sys
48
49
import re
49
50
import os
50
51
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
import contextlib
59
import struct
60
import fcntl
61
import functools
62
import cPickle as pickle
63
import select
57
64
58
65
import dbus
66
import dbus.service
59
67
import gobject
60
68
import avahi
61
69
from dbus.mainloop.glib import DBusGMainLoop
62
70
import ctypes
63
64
version = "1.0"
65
66
logger = logging.Logger('mandos')
67
syslogger = logging.handlers.SysLogHandler\
68
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
69
address = "/dev/log")
70
syslogger.setFormatter(logging.Formatter\
71
('Mandos: %(levelname)s: %(message)s'))
71
import ctypes.util
72
import xml.dom.minidom
73
import inspect
74
75
try:
76
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
77
except AttributeError:
78
try:
79
from IN import SO_BINDTODEVICE
80
except ImportError:
81
SO_BINDTODEVICE = None
82
83
84
version = "1.0.14"
85
86
logger = logging.Logger(u'mandos')
87
syslogger = (logging.handlers.SysLogHandler
88
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
89
address = "/dev/log"))
90
syslogger.setFormatter(logging.Formatter
91
(u'Mandos [%(process)d]: %(levelname)s:'
92
u' %(message)s'))
72
93
logger.addHandler(syslogger)
73
94
74
95
console = logging.StreamHandler()
75
console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
76
' %(message)s'))
96
console.setFormatter(logging.Formatter(u'%(name)s [%(process)d]:'
97
u' %(levelname)s:'
98
u' %(message)s'))
77
99
logger.addHandler(console)
78
100
79
101
class AvahiError(Exception):
80
def __init__(self, value):
102
def __init__(self, value, *args, **kwargs):
81
103
self.value = value
82
def __str__(self):
83
return repr(self.value)
104
super(AvahiError, self).__init__(value, *args, **kwargs)
105
def __unicode__(self):
106
return unicode(repr(self.value))
84
107
85
108
class AvahiServiceError(AvahiError):
86
109
pass
91
114
92
115
class AvahiService(object):
93
116
"""An Avahi (Zeroconf) service.
117
94
118
Attributes:
95
119
interface: integer; avahi.IF_UNSPEC or an interface index.
96
120
Used to optionally bind to the specified interface.
97
name: string; Example: 'Mandos'
98
type: string; Example: '_mandos._tcp'.
121
name: string; Example: u'Mandos'
122
type: string; Example: u'_mandos._tcp'.
99
123
See <http://www.dns-sd.org/ServiceTypes.html>
100
124
port: integer; what port to announce
101
125
TXT: list of strings; TXT record for the service
104
128
max_renames: integer; maximum number of renames
105
129
rename_count: integer; counter so we only rename after collisions
106
130
a sensible number of times
131
group: D-Bus Entry Group
132
server: D-Bus Server
133
bus: dbus.SystemBus()
107
134
"""
108
135
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
109
type = None, port = None, TXT = None, domain = "",
110
host = "", max_renames = 32768):
136
servicetype = None, port = None, TXT = None,
137
domain = u"", host = u"", max_renames = 32768,
138
protocol = avahi.PROTO_UNSPEC, bus = None):
111
139
self.interface = interface
112
140
self.name = name
113
self.type = type
141
self.type = servicetype
114
142
self.port = port
115
if TXT is None:
116
self.TXT = []
117
else:
118
self.TXT = TXT
143
self.TXT = TXT if TXT is not None else []
119
144
self.domain = domain
120
145
self.host = host
121
146
self.rename_count = 0
122
147
self.max_renames = max_renames
148
self.protocol = protocol
149
self.group = None # our entry group
150
self.server = None
151
self.bus = bus
123
152
def rename(self):
124
153
"""Derived from the Avahi example code"""
125
154
if self.rename_count >= self.max_renames:
126
logger.critical(u"No suitable service name found after %i"
127
u" retries, exiting.", rename_count)
128
raise AvahiServiceError("Too many renames")
129
self.name = server.GetAlternativeServiceName(self.name)
130
logger.info(u"Changing name to %r ...", str(self.name))
131
syslogger.setFormatter(logging.Formatter\
132
('Mandos (%s): %%(levelname)s:'
133
' %%(message)s' % self.name))
155
logger.critical(u"No suitable Zeroconf service name found"
156
u" after %i retries, exiting.",
157
self.rename_count)
158
raise AvahiServiceError(u"Too many renames")
159
self.name = self.server.GetAlternativeServiceName(self.name)
160
logger.info(u"Changing Zeroconf service name to %r ...",
161
unicode(self.name))
162
syslogger.setFormatter(logging.Formatter
163
(u'Mandos (%s) [%%(process)d]:'
164
u' %%(levelname)s: %%(message)s'
165
% self.name))
134
166
self.remove()
135
167
self.add()
136
168
self.rename_count += 1
137
169
def remove(self):
138
170
"""Derived from the Avahi example code"""
139
if group is not None:
140
group.Reset()
171
if self.group is not None:
172
self.group.Reset()
141
173
def add(self):
142
174
"""Derived from the Avahi example code"""
143
global group
144
if group is None:
145
group = dbus.Interface\
146
(bus.get_object(avahi.DBUS_NAME,
147
server.EntryGroupNew()),
148
avahi.DBUS_INTERFACE_ENTRY_GROUP)
149
group.connect_to_signal('StateChanged',
150
entry_group_state_changed)
151
logger.debug(u"Adding service '%s' of type '%s' ...",
152
service.name, service.type)
153
group.AddService(
154
self.interface, # interface
155
avahi.PROTO_INET6, # protocol
156
dbus.UInt32(0), # flags
157
self.name, self.type,
158
self.domain, self.host,
159
dbus.UInt16(self.port),
160
avahi.string_array_to_txt_array(self.TXT))
161
group.Commit()
162
163
# From the Avahi example code:
164
group = None # our entry group
165
# End of Avahi example code
175
if self.group is None:
176
self.group = dbus.Interface(
177
self.bus.get_object(avahi.DBUS_NAME,
178
self.server.EntryGroupNew()),
179
avahi.DBUS_INTERFACE_ENTRY_GROUP)
180
self.group.connect_to_signal('StateChanged',
181
self
182
.entry_group_state_changed)
183
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
184
self.name, self.type)
185
self.group.AddService(
186
self.interface,
187
self.protocol,
188
dbus.UInt32(0), # flags
189
self.name, self.type,
190
self.domain, self.host,
191
dbus.UInt16(self.port),
192
avahi.string_array_to_txt_array(self.TXT))
193
self.group.Commit()
194
def entry_group_state_changed(self, state, error):
195
"""Derived from the Avahi example code"""
196
logger.debug(u"Avahi entry group state change: %i", state)
197
198
if state == avahi.ENTRY_GROUP_ESTABLISHED:
199
logger.debug(u"Zeroconf service established.")
200
elif state == avahi.ENTRY_GROUP_COLLISION:
201
logger.warning(u"Zeroconf service name collision.")
202
self.rename()
203
elif state == avahi.ENTRY_GROUP_FAILURE:
204
logger.critical(u"Avahi: Error in group state changed %s",
205
unicode(error))
206
raise AvahiGroupError(u"State changed: %s"
207
% unicode(error))
208
def cleanup(self):
209
"""Derived from the Avahi example code"""
210
if self.group is not None:
211
self.group.Free()
212
self.group = None
213
def server_state_changed(self, state):
214
"""Derived from the Avahi example code"""
215
logger.debug(u"Avahi server state change: %i", state)
216
if state == avahi.SERVER_COLLISION:
217
logger.error(u"Zeroconf server name collision")
218
self.remove()
219
elif state == avahi.SERVER_RUNNING:
220
self.add()
221
def activate(self):
222
"""Derived from the Avahi example code"""
223
if self.server is None:
224
self.server = dbus.Interface(
225
self.bus.get_object(avahi.DBUS_NAME,
226
avahi.DBUS_PATH_SERVER),
227
avahi.DBUS_INTERFACE_SERVER)
228
self.server.connect_to_signal(u"StateChanged",
229
self.server_state_changed)
230
self.server_state_changed(self.server.GetState())
166
231
167
232
168
233
class Client(object):
169
234
"""A representation of a client host served by this server.
235
170
236
Attributes:
171
name: string; from the config file, used in log messages
237
name: string; from the config file, used in log messages and
238
D-Bus identifiers
172
239
fingerprint: string (40 or 32 hexadecimal digits); used to
173
240
uniquely identify the client
174
secret: bytestring; sent verbatim (over TLS) to client
175
host: string; available for use by the checker command
176
created: datetime.datetime(); object creation, not client host
177
last_checked_ok: datetime.datetime() or None if not yet checked OK
178
timeout: datetime.timedelta(); How long from last_checked_ok
179
until this client is invalid
180
interval: datetime.timedelta(); How often to start a new checker
181
stop_hook: If set, called by stop() as stop_hook(self)
182
checker: subprocess.Popen(); a running checker process used
183
to see if the client lives.
184
'None' if no process is running.
241
secret: bytestring; sent verbatim (over TLS) to client
242
host: string; available for use by the checker command
243
created: datetime.datetime(); (UTC) object creation
244
last_enabled: datetime.datetime(); (UTC)
245
enabled: bool()
246
last_checked_ok: datetime.datetime(); (UTC) or None
247
timeout: datetime.timedelta(); How long from last_checked_ok
248
until this client is disabled
249
interval: datetime.timedelta(); How often to start a new checker
250
disable_hook: If set, called by disable() as disable_hook(self)
251
checker: subprocess.Popen(); a running checker process used
252
to see if the client lives.
253
'None' if no process is running.
185
254
checker_initiator_tag: a gobject event source tag, or None
186
stop_initiator_tag: - '' -
255
disable_initiator_tag: - '' -
187
256
checker_callback_tag: - '' -
188
257
checker_command: string; External command which is run to check if
189
258
client lives. %() expansions are done at
190
259
runtime with vars(self) as dict, so that for
191
260
instance %(name)s can be used in the command.
192
Private attibutes:
193
_timeout: Real variable for 'timeout'
194
_interval: Real variable for 'interval'
195
_timeout_milliseconds: Used when calling gobject.timeout_add()
196
_interval_milliseconds: - '' -
261
current_checker_command: string; current running checker_command
197
262
"""
198
def _set_timeout(self, timeout):
199
"Setter function for 'timeout' attribute"
200
self._timeout = timeout
201
self._timeout_milliseconds = ((self.timeout.days
202
* 24 * 60 * 60 * 1000)
203
+ (self.timeout.seconds * 1000)
204
+ (self.timeout.microseconds
205
// 1000))
206
timeout = property(lambda self: self._timeout,
207
_set_timeout)
208
del _set_timeout
209
def _set_interval(self, interval):
210
"Setter function for 'interval' attribute"
211
self._interval = interval
212
self._interval_milliseconds = ((self.interval.days
213
* 24 * 60 * 60 * 1000)
214
+ (self.interval.seconds
215
* 1000)
216
+ (self.interval.microseconds
217
// 1000))
218
interval = property(lambda self: self._interval,
219
_set_interval)
220
del _set_interval
221
def __init__(self, name = None, stop_hook=None, config={}):
263
264
@staticmethod
265
def _timedelta_to_milliseconds(td):
266
"Convert a datetime.timedelta() to milliseconds"
267
return ((td.days * 24 * 60 * 60 * 1000)
268
+ (td.seconds * 1000)
269
+ (td.microseconds // 1000))
270
271
def timeout_milliseconds(self):
272
"Return the 'timeout' attribute in milliseconds"
273
return self._timedelta_to_milliseconds(self.timeout)
274
275
def interval_milliseconds(self):
276
"Return the 'interval' attribute in milliseconds"
277
return self._timedelta_to_milliseconds(self.interval)
278
279
def __init__(self, name = None, disable_hook=None, config=None):
222
280
"""Note: the 'checker' key in 'config' sets the
223
281
'checker_command' attribute and *not* the 'checker'
224
282
attribute."""
225
283
self.name = name
284
if config is None:
285
config = {}
226
286
logger.debug(u"Creating client %r", self.name)
227
287
# Uppercase and remove spaces from fingerprint for later
228
288
# comparison purposes with return value from the fingerprint()
229
289
# function
230
self.fingerprint = config["fingerprint"].upper()\
231
.replace(u" ", u"")
290
self.fingerprint = (config[u"fingerprint"].upper()
291
.replace(u" ", u""))
232
292
logger.debug(u" Fingerprint: %s", self.fingerprint)
233
if "secret" in config:
234
self.secret = config["secret"].decode(u"base64")
235
elif "secfile" in config:
236
sf = open(config["secfile"])
237
self.secret = sf.read()
238
sf.close()
293
if u"secret" in config:
294
self.secret = config[u"secret"].decode(u"base64")
295
elif u"secfile" in config:
296
with open(os.path.expanduser(os.path.expandvars
297
(config[u"secfile"])),
298
"rb") as secfile:
299
self.secret = secfile.read()
239
300
else:
240
301
raise TypeError(u"No secret or secfile for client %s"
241
302
% self.name)
242
self.host = config.get("host", "")
243
self.created = datetime.datetime.now()
303
self.host = config.get(u"host", u"")
304
self.created = datetime.datetime.utcnow()
305
self.enabled = False
306
self.last_enabled = None
244
307
self.last_checked_ok = None
245
self.timeout = string_to_delta(config["timeout"])
246
self.interval = string_to_delta(config["interval"])
247
self.stop_hook = stop_hook
308
self.timeout = string_to_delta(config[u"timeout"])
309
self.interval = string_to_delta(config[u"interval"])
310
self.disable_hook = disable_hook
248
311
self.checker = None
249
312
self.checker_initiator_tag = None
250
self.stop_initiator_tag = None
313
self.disable_initiator_tag = None
251
314
self.checker_callback_tag = None
252
self.check_command = config["checker"]
253
def start(self):
315
self.checker_command = config[u"checker"]
316
self.current_checker_command = None
317
self.last_connect = None
318
319
def enable(self):
254
320
"""Start this client's checker and timeout hooks"""
321
if getattr(self, u"enabled", False):
322
# Already enabled
323
return
324
self.last_enabled = datetime.datetime.utcnow()
255
325
# Schedule a new checker to be started an 'interval' from now,
256
326
# and every interval from then on.
257
self.checker_initiator_tag = gobject.timeout_add\
258
(self._interval_milliseconds,
259
self.start_checker)
327
self.checker_initiator_tag = (gobject.timeout_add
328
(self.interval_milliseconds(),
329
self.start_checker))
330
# Schedule a disable() when 'timeout' has passed
331
self.disable_initiator_tag = (gobject.timeout_add
332
(self.timeout_milliseconds(),
333
self.disable))
334
self.enabled = True
260
335
# Also start a new checker *right now*.
261
336
self.start_checker()
262
# Schedule a stop() when 'timeout' has passed
263
self.stop_initiator_tag = gobject.timeout_add\
264
(self._timeout_milliseconds,
265
self.stop)
266
def stop(self):
267
"""Stop this client.
268
The possibility that a client might be restarted is left open,
269
but not currently used."""
270
# If this client doesn't have a secret, it is already stopped.
271
if hasattr(self, "secret") and self.secret:
272
logger.info(u"Stopping client %s", self.name)
273
self.secret = None
274
else:
337
338
def disable(self, quiet=True):
339
"""Disable this client."""
340
if not getattr(self, "enabled", False):
275
341
return False
276
if getattr(self, "stop_initiator_tag", False):
277
gobject.source_remove(self.stop_initiator_tag)
278
self.stop_initiator_tag = None
279
if getattr(self, "checker_initiator_tag", False):
342
if not quiet:
343
logger.info(u"Disabling client %s", self.name)
344
if getattr(self, u"disable_initiator_tag", False):
345
gobject.source_remove(self.disable_initiator_tag)
346
self.disable_initiator_tag = None
347
if getattr(self, u"checker_initiator_tag", False):
280
348
gobject.source_remove(self.checker_initiator_tag)
281
349
self.checker_initiator_tag = None
282
350
self.stop_checker()
283
if self.stop_hook:
284
self.stop_hook(self)
351
if self.disable_hook:
352
self.disable_hook(self)
353
self.enabled = False
285
354
# Do not run this again if called by a gobject.timeout_add
286
355
return False
356
287
357
def __del__(self):
288
self.stop_hook = None
289
self.stop()
290
def checker_callback(self, pid, condition):
358
self.disable_hook = None
359
self.disable()
360
361
def checker_callback(self, pid, condition, command):
291
362
"""The checker has completed, so take appropriate actions."""
292
now = datetime.datetime.now()
293
363
self.checker_callback_tag = None
294
364
self.checker = None
295
if os.WIFEXITED(condition) \
296
and (os.WEXITSTATUS(condition) == 0):
297
logger.info(u"Checker for %(name)s succeeded",
298
vars(self))
299
self.last_checked_ok = now
300
gobject.source_remove(self.stop_initiator_tag)
301
self.stop_initiator_tag = gobject.timeout_add\
302
(self._timeout_milliseconds,
303
self.stop)
304
elif not os.WIFEXITED(condition):
365
if os.WIFEXITED(condition):
366
exitstatus = os.WEXITSTATUS(condition)
367
if exitstatus == 0:
368
logger.info(u"Checker for %(name)s succeeded",
369
vars(self))
370
self.checked_ok()
371
else:
372
logger.info(u"Checker for %(name)s failed",
373
vars(self))
374
else:
305
375
logger.warning(u"Checker for %(name)s crashed?",
306
376
vars(self))
307
else:
308
logger.info(u"Checker for %(name)s failed",
309
vars(self))
377
378
def checked_ok(self):
379
"""Bump up the timeout for this client.
380
381
This should only be called when the client has been seen,
382
alive and well.
383
"""
384
self.last_checked_ok = datetime.datetime.utcnow()
385
gobject.source_remove(self.disable_initiator_tag)
386
self.disable_initiator_tag = (gobject.timeout_add
387
(self.timeout_milliseconds(),
388
self.disable))
389
310
390
def start_checker(self):
311
391
"""Start a new checker subprocess if one is not running.
392
312
393
If a checker already exists, leave it running and do
313
394
nothing."""
314
395
# The reason for not killing a running checker is that if we
317
398
# client would inevitably timeout, since no checker would get
318
399
# a chance to run to completion. If we instead leave running
319
400
# checkers alone, the checker would have to take more time
320
# than 'timeout' for the client to be declared invalid, which
321
# is as it should be.
401
# than 'timeout' for the client to be disabled, which is as it
402
# should be.
403
404
# If a checker exists, make sure it is not a zombie
405
try:
406
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
407
except (AttributeError, OSError), error:
408
if (isinstance(error, OSError)
409
and error.errno != errno.ECHILD):
410
raise error
411
else:
412
if pid:
413
logger.warning(u"Checker was a zombie")
414
gobject.source_remove(self.checker_callback_tag)
415
self.checker_callback(pid, status,
416
self.current_checker_command)
417
# Start a new checker if needed
322
418
if self.checker is None:
323
419
try:
324
# In case check_command has exactly one % operator
325
command = self.check_command % self.host
420
# In case checker_command has exactly one % operator
421
command = self.checker_command % self.host
326
422
except TypeError:
327
423
# Escape attributes for the shell
328
escaped_attrs = dict((key, re.escape(str(val)))
424
escaped_attrs = dict((key,
425
re.escape(unicode(str(val),
426
errors=
427
u'replace')))
329
428
for key, val in
330
429
vars(self).iteritems())
331
430
try:
332
command = self.check_command % escaped_attrs
431
command = self.checker_command % escaped_attrs
333
432
except TypeError, error:
334
433
logger.error(u'Could not format string "%s":'
335
u' %s', self.check_command, error)
434
u' %s', self.checker_command, error)
336
435
return True # Try again later
436
self.current_checker_command = command
337
437
try:
338
438
logger.info(u"Starting checker %r for %s",
339
439
command, self.name)
440
# We don't need to redirect stdout and stderr, since
441
# in normal mode, that is already done by daemon(),
442
# and in debug mode we don't want to. (Stdin is
443
# always replaced by /dev/null.)
340
444
self.checker = subprocess.Popen(command,
341
445
close_fds=True,
342
shell=True, cwd="/")
343
self.checker_callback_tag = gobject.child_watch_add\
344
(self.checker.pid,
345
self.checker_callback)
346
except subprocess.OSError, error:
446
shell=True, cwd=u"/")
447
self.checker_callback_tag = (gobject.child_watch_add
448
(self.checker.pid,
449
self.checker_callback,
450
data=command))
451
# The checker may have completed before the gobject
452
# watch was added. Check for this.
453
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
454
if pid:
455
gobject.source_remove(self.checker_callback_tag)
456
self.checker_callback(pid, status, command)
457
except OSError, error:
347
458
logger.error(u"Failed to start subprocess: %s",
348
459
error)
349
460
# Re-run this periodically if run by gobject.timeout_add
350
461
return True
462
351
463
def stop_checker(self):
352
464
"""Force the checker process, if any, to stop."""
353
465
if self.checker_callback_tag:
354
466
gobject.source_remove(self.checker_callback_tag)
355
467
self.checker_callback_tag = None
356
if getattr(self, "checker", None) is None:
468
if getattr(self, u"checker", None) is None:
357
469
return
358
470
logger.debug(u"Stopping checker for %(name)s", vars(self))
359
471
try:
360
472
os.kill(self.checker.pid, signal.SIGTERM)
361
#os.sleep(0.5)
473
#time.sleep(0.5)
362
474
#if self.checker.poll() is None:
363
475
# os.kill(self.checker.pid, signal.SIGKILL)
364
476
except OSError, error:
365
477
if error.errno != errno.ESRCH: # No such process
366
478
raise
367
479
self.checker = None
368
def still_valid(self):
369
"""Has the timeout not yet passed for this client?"""
370
now = datetime.datetime.now()
480
481
482
def dbus_service_property(dbus_interface, signature=u"v",
483
access=u"readwrite", byte_arrays=False):
484
"""Decorators for marking methods of a DBusObjectWithProperties to
485
become properties on the D-Bus.
486
487
The decorated method will be called with no arguments by "Get"
488
and with one argument by "Set".
489
490
The parameters, where they are supported, are the same as
491
dbus.service.method, except there is only "signature", since the
492
type from Get() and the type sent to Set() is the same.
493
"""
494
# Encoding deeply encoded byte arrays is not supported yet by the
495
# "Set" method, so we fail early here:
496
if byte_arrays and signature != u"ay":
497
raise ValueError(u"Byte arrays not supported for non-'ay'"
498
u" signature %r" % signature)
499
def decorator(func):
500
func._dbus_is_property = True
501
func._dbus_interface = dbus_interface
502
func._dbus_signature = signature
503
func._dbus_access = access
504
func._dbus_name = func.__name__
505
if func._dbus_name.endswith(u"_dbus_property"):
506
func._dbus_name = func._dbus_name[:-14]
507
func._dbus_get_args_options = {u'byte_arrays': byte_arrays }
508
return func
509
return decorator
510
511
512
class DBusPropertyException(dbus.exceptions.DBusException):
513
"""A base class for D-Bus property-related exceptions
514
"""
515
def __unicode__(self):
516
return unicode(str(self))
517
518
519
class DBusPropertyAccessException(DBusPropertyException):
520
"""A property's access permissions disallows an operation.
521
"""
522
pass
523
524
525
class DBusPropertyNotFound(DBusPropertyException):
526
"""An attempt was made to access a non-existing property.
527
"""
528
pass
529
530
531
class DBusObjectWithProperties(dbus.service.Object):
532
"""A D-Bus object with properties.
533
534
Classes inheriting from this can use the dbus_service_property
535
decorator to expose methods as D-Bus properties. It exposes the
536
standard Get(), Set(), and GetAll() methods on the D-Bus.
537
"""
538
539
@staticmethod
540
def _is_dbus_property(obj):
541
return getattr(obj, u"_dbus_is_property", False)
542
543
def _get_all_dbus_properties(self):
544
"""Returns a generator of (name, attribute) pairs
545
"""
546
return ((prop._dbus_name, prop)
547
for name, prop in
548
inspect.getmembers(self, self._is_dbus_property))
549
550
def _get_dbus_property(self, interface_name, property_name):
551
"""Returns a bound method if one exists which is a D-Bus
552
property with the specified name and interface.
553
"""
554
for name in (property_name,
555
property_name + u"_dbus_property"):
556
prop = getattr(self, name, None)
557
if (prop is None
558
or not self._is_dbus_property(prop)
559
or prop._dbus_name != property_name
560
or (interface_name and prop._dbus_interface
561
and interface_name != prop._dbus_interface)):
562
continue
563
return prop
564
# No such property
565
raise DBusPropertyNotFound(self.dbus_object_path + u":"
566
+ interface_name + u"."
567
+ property_name)
568
569
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ss",
570
out_signature=u"v")
571
def Get(self, interface_name, property_name):
572
"""Standard D-Bus property Get() method, see D-Bus standard.
573
"""
574
prop = self._get_dbus_property(interface_name, property_name)
575
if prop._dbus_access == u"write":
576
raise DBusPropertyAccessException(property_name)
577
value = prop()
578
if not hasattr(value, u"variant_level"):
579
return value
580
return type(value)(value, variant_level=value.variant_level+1)
581
582
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ssv")
583
def Set(self, interface_name, property_name, value):
584
"""Standard D-Bus property Set() method, see D-Bus standard.
585
"""
586
prop = self._get_dbus_property(interface_name, property_name)
587
if prop._dbus_access == u"read":
588
raise DBusPropertyAccessException(property_name)
589
if prop._dbus_get_args_options[u"byte_arrays"]:
590
# The byte_arrays option is not supported yet on
591
# signatures other than "ay".
592
if prop._dbus_signature != u"ay":
593
raise ValueError
594
value = dbus.ByteArray(''.join(unichr(byte)
595
for byte in value))
596
prop(value)
597
598
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"s",
599
out_signature=u"a{sv}")
600
def GetAll(self, interface_name):
601
"""Standard D-Bus property GetAll() method, see D-Bus
602
standard.
603
604
Note: Will not include properties with access="write".
605
"""
606
all = {}
607
for name, prop in self._get_all_dbus_properties():
608
if (interface_name
609
and interface_name != prop._dbus_interface):
610
# Interface non-empty but did not match
611
continue
612
# Ignore write-only properties
613
if prop._dbus_access == u"write":
614
continue
615
value = prop()
616
if not hasattr(value, u"variant_level"):
617
all[name] = value
618
continue
619
all[name] = type(value)(value, variant_level=
620
value.variant_level+1)
621
return dbus.Dictionary(all, signature=u"sv")
622
623
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
624
out_signature=u"s",
625
path_keyword='object_path',
626
connection_keyword='connection')
627
def Introspect(self, object_path, connection):
628
"""Standard D-Bus method, overloaded to insert property tags.
629
"""
630
xmlstring = dbus.service.Object.Introspect(self, object_path,
631
connection)
632
try:
633
document = xml.dom.minidom.parseString(xmlstring)
634
def make_tag(document, name, prop):
635
e = document.createElement(u"property")
636
e.setAttribute(u"name", name)
637
e.setAttribute(u"type", prop._dbus_signature)
638
e.setAttribute(u"access", prop._dbus_access)
639
return e
640
for if_tag in document.getElementsByTagName(u"interface"):
641
for tag in (make_tag(document, name, prop)
642
for name, prop
643
in self._get_all_dbus_properties()
644
if prop._dbus_interface
645
== if_tag.getAttribute(u"name")):
646
if_tag.appendChild(tag)
647
# Add the names to the return values for the
648
# "org.freedesktop.DBus.Properties" methods
649
if (if_tag.getAttribute(u"name")
650
== u"org.freedesktop.DBus.Properties"):
651
for cn in if_tag.getElementsByTagName(u"method"):
652
if cn.getAttribute(u"name") == u"Get":
653
for arg in cn.getElementsByTagName(u"arg"):
654
if (arg.getAttribute(u"direction")
655
== u"out"):
656
arg.setAttribute(u"name", u"value")
657
elif cn.getAttribute(u"name") == u"GetAll":
658
for arg in cn.getElementsByTagName(u"arg"):
659
if (arg.getAttribute(u"direction")
660
== u"out"):
661
arg.setAttribute(u"name", u"props")
662
xmlstring = document.toxml(u"utf-8")
663
document.unlink()
664
except (AttributeError, xml.dom.DOMException,
665
xml.parsers.expat.ExpatError), error:
666
logger.error(u"Failed to override Introspection method",
667
error)
668
return xmlstring
669
670
671
class ClientDBus(Client, DBusObjectWithProperties):
672
"""A Client class using D-Bus
673
674
Attributes:
675
dbus_object_path: dbus.ObjectPath
676
bus: dbus.SystemBus()
677
"""
678
# dbus.service.Object doesn't use super(), so we can't either.
679
680
def __init__(self, bus = None, *args, **kwargs):
681
self.bus = bus
682
Client.__init__(self, *args, **kwargs)
683
# Only now, when this client is initialized, can it show up on
684
# the D-Bus
685
self.dbus_object_path = (dbus.ObjectPath
686
(u"/clients/"
687
+ self.name.replace(u".", u"_")))
688
DBusObjectWithProperties.__init__(self, self.bus,
689
self.dbus_object_path)
690
691
@staticmethod
692
def _datetime_to_dbus(dt, variant_level=0):
693
"""Convert a UTC datetime.datetime() to a D-Bus type."""
694
return dbus.String(dt.isoformat(),
695
variant_level=variant_level)
696
697
def enable(self):
698
oldstate = getattr(self, u"enabled", False)
699
r = Client.enable(self)
700
if oldstate != self.enabled:
701
# Emit D-Bus signals
702
self.PropertyChanged(dbus.String(u"enabled"),
703
dbus.Boolean(True, variant_level=1))
704
self.PropertyChanged(
705
dbus.String(u"last_enabled"),
706
self._datetime_to_dbus(self.last_enabled,
707
variant_level=1))
708
return r
709
710
def disable(self, quiet = False):
711
oldstate = getattr(self, u"enabled", False)
712
r = Client.disable(self, quiet=quiet)
713
if not quiet and oldstate != self.enabled:
714
# Emit D-Bus signal
715
self.PropertyChanged(dbus.String(u"enabled"),
716
dbus.Boolean(False, variant_level=1))
717
return r
718
719
def __del__(self, *args, **kwargs):
720
try:
721
self.remove_from_connection()
722
except LookupError:
723
pass
724
if hasattr(DBusObjectWithProperties, u"__del__"):
725
DBusObjectWithProperties.__del__(self, *args, **kwargs)
726
Client.__del__(self, *args, **kwargs)
727
728
def checker_callback(self, pid, condition, command,
729
*args, **kwargs):
730
self.checker_callback_tag = None
731
self.checker = None
732
# Emit D-Bus signal
733
self.PropertyChanged(dbus.String(u"checker_running"),
734
dbus.Boolean(False, variant_level=1))
735
if os.WIFEXITED(condition):
736
exitstatus = os.WEXITSTATUS(condition)
737
# Emit D-Bus signal
738
self.CheckerCompleted(dbus.Int16(exitstatus),
739
dbus.Int64(condition),
740
dbus.String(command))
741
else:
742
# Emit D-Bus signal
743
self.CheckerCompleted(dbus.Int16(-1),
744
dbus.Int64(condition),
745
dbus.String(command))
746
747
return Client.checker_callback(self, pid, condition, command,
748
*args, **kwargs)
749
750
def checked_ok(self, *args, **kwargs):
751
r = Client.checked_ok(self, *args, **kwargs)
752
# Emit D-Bus signal
753
self.PropertyChanged(
754
dbus.String(u"last_checked_ok"),
755
(self._datetime_to_dbus(self.last_checked_ok,
756
variant_level=1)))
757
return r
758
759
def start_checker(self, *args, **kwargs):
760
old_checker = self.checker
761
if self.checker is not None:
762
old_checker_pid = self.checker.pid
763
else:
764
old_checker_pid = None
765
r = Client.start_checker(self, *args, **kwargs)
766
# Only if new checker process was started
767
if (self.checker is not None
768
and old_checker_pid != self.checker.pid):
769
# Emit D-Bus signal
770
self.CheckerStarted(self.current_checker_command)
771
self.PropertyChanged(
772
dbus.String(u"checker_running"),
773
dbus.Boolean(True, variant_level=1))
774
return r
775
776
def stop_checker(self, *args, **kwargs):
777
old_checker = getattr(self, u"checker", None)
778
r = Client.stop_checker(self, *args, **kwargs)
779
if (old_checker is not None
780
and getattr(self, u"checker", None) is None):
781
self.PropertyChanged(dbus.String(u"checker_running"),
782
dbus.Boolean(False, variant_level=1))
783
return r
784
785
## D-Bus methods, signals & properties
786
_interface = u"se.bsnet.fukt.Mandos.Client"
787
788
## Signals
789
790
# CheckerCompleted - signal
791
@dbus.service.signal(_interface, signature=u"nxs")
792
def CheckerCompleted(self, exitcode, waitstatus, command):
793
"D-Bus signal"
794
pass
795
796
# CheckerStarted - signal
797
@dbus.service.signal(_interface, signature=u"s")
798
def CheckerStarted(self, command):
799
"D-Bus signal"
800
pass
801
802
# PropertyChanged - signal
803
@dbus.service.signal(_interface, signature=u"sv")
804
def PropertyChanged(self, property, value):
805
"D-Bus signal"
806
pass
807
808
# GotSecret - signal
809
@dbus.service.signal(_interface)
810
def GotSecret(self):
811
"D-Bus signal"
812
pass
813
814
# Rejected - signal
815
@dbus.service.signal(_interface)
816
def Rejected(self):
817
"D-Bus signal"
818
pass
819
820
## Methods
821
822
# CheckedOK - method
823
@dbus.service.method(_interface)
824
def CheckedOK(self):
825
return self.checked_ok()
826
827
# Enable - method
828
@dbus.service.method(_interface)
829
def Enable(self):
830
"D-Bus method"
831
self.enable()
832
833
# StartChecker - method
834
@dbus.service.method(_interface)
835
def StartChecker(self):
836
"D-Bus method"
837
self.start_checker()
838
839
# Disable - method
840
@dbus.service.method(_interface)
841
def Disable(self):
842
"D-Bus method"
843
self.disable()
844
845
# StopChecker - method
846
@dbus.service.method(_interface)
847
def StopChecker(self):
848
self.stop_checker()
849
850
## Properties
851
852
# name - property
853
@dbus_service_property(_interface, signature=u"s", access=u"read")
854
def name_dbus_property(self):
855
return dbus.String(self.name)
856
857
# fingerprint - property
858
@dbus_service_property(_interface, signature=u"s", access=u"read")
859
def fingerprint_dbus_property(self):
860
return dbus.String(self.fingerprint)
861
862
# host - property
863
@dbus_service_property(_interface, signature=u"s",
864
access=u"readwrite")
865
def host_dbus_property(self, value=None):
866
if value is None: # get
867
return dbus.String(self.host)
868
self.host = value
869
# Emit D-Bus signal
870
self.PropertyChanged(dbus.String(u"host"),
871
dbus.String(value, variant_level=1))
872
873
# created - property
874
@dbus_service_property(_interface, signature=u"s", access=u"read")
875
def created_dbus_property(self):
876
return dbus.String(self._datetime_to_dbus(self.created))
877
878
# last_enabled - property
879
@dbus_service_property(_interface, signature=u"s", access=u"read")
880
def last_enabled_dbus_property(self):
881
if self.last_enabled is None:
882
return dbus.String(u"")
883
return dbus.String(self._datetime_to_dbus(self.last_enabled))
884
885
# enabled - property
886
@dbus_service_property(_interface, signature=u"b",
887
access=u"readwrite")
888
def enabled_dbus_property(self, value=None):
889
if value is None: # get
890
return dbus.Boolean(self.enabled)
891
if value:
892
self.enable()
893
else:
894
self.disable()
895
896
# last_checked_ok - property
897
@dbus_service_property(_interface, signature=u"s",
898
access=u"readwrite")
899
def last_checked_ok_dbus_property(self, value=None):
900
if value is not None:
901
self.checked_ok()
902
return
371
903
if self.last_checked_ok is None:
372
return now < (self.created + self.timeout)
373
else:
374
return now < (self.last_checked_ok + self.timeout)
375
376
377
def peer_certificate(session):
378
"Return the peer's OpenPGP certificate as a bytestring"
379
# If not an OpenPGP certificate...
380
if gnutls.library.functions.gnutls_certificate_type_get\
381
(session._c_object) \
382
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP:
383
# ...do the normal thing
384
return session.peer_certificate
385
list_size = ctypes.c_uint()
386
cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
387
(session._c_object, ctypes.byref(list_size))
388
if list_size.value == 0:
389
return None
390
cert = cert_list[0]
391
return ctypes.string_at(cert.data, cert.size)
392
393
394
def fingerprint(openpgp):
395
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
396
# New GnuTLS "datum" with the OpenPGP public key
397
datum = gnutls.library.types.gnutls_datum_t\
398
(ctypes.cast(ctypes.c_char_p(openpgp),
399
ctypes.POINTER(ctypes.c_ubyte)),
400
ctypes.c_uint(len(openpgp)))
401
# New empty GnuTLS certificate
402
crt = gnutls.library.types.gnutls_openpgp_crt_t()
403
gnutls.library.functions.gnutls_openpgp_crt_init\
404
(ctypes.byref(crt))
405
# Import the OpenPGP public key into the certificate
406
gnutls.library.functions.gnutls_openpgp_crt_import\
407
(crt, ctypes.byref(datum),
408
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
409
# New buffer for the fingerprint
410
buffer = ctypes.create_string_buffer(20)
411
buffer_length = ctypes.c_size_t()
412
# Get the fingerprint from the certificate into the buffer
413
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
414
(crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
415
# Deinit the certificate
416
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
417
# Convert the buffer to a Python bytestring
418
fpr = ctypes.string_at(buffer, buffer_length.value)
419
# Convert the bytestring to hexadecimal notation
420
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
421
return hex_fpr
422
423
424
class tcp_handler(SocketServer.BaseRequestHandler, object):
425
"""A TCP request handler class.
426
Instantiated by IPv6_TCPServer for each request to handle it.
904
return dbus.String(u"")
905
return dbus.String(self._datetime_to_dbus(self
906
.last_checked_ok))
907
908
# timeout - property
909
@dbus_service_property(_interface, signature=u"t",
910
access=u"readwrite")
911
def timeout_dbus_property(self, value=None):
912
if value is None: # get
913
return dbus.UInt64(self.timeout_milliseconds())
914
self.timeout = datetime.timedelta(0, 0, 0, value)
915
# Emit D-Bus signal
916
self.PropertyChanged(dbus.String(u"timeout"),
917
dbus.UInt64(value, variant_level=1))
918
if getattr(self, u"disable_initiator_tag", None) is None:
919
return
920
# Reschedule timeout
921
gobject.source_remove(self.disable_initiator_tag)
922
self.disable_initiator_tag = None
923
time_to_die = (self.
924
_timedelta_to_milliseconds((self
925
.last_checked_ok
926
+ self.timeout)
927
- datetime.datetime
928
.utcnow()))
929
if time_to_die <= 0:
930
# The timeout has passed
931
self.disable()
932
else:
933
self.disable_initiator_tag = (gobject.timeout_add
934
(time_to_die, self.disable))
935
936
# interval - property
937
@dbus_service_property(_interface, signature=u"t",
938
access=u"readwrite")
939
def interval_dbus_property(self, value=None):
940
if value is None: # get
941
return dbus.UInt64(self.interval_milliseconds())
942
self.interval = datetime.timedelta(0, 0, 0, value)
943
# Emit D-Bus signal
944
self.PropertyChanged(dbus.String(u"interval"),
945
dbus.UInt64(value, variant_level=1))
946
if getattr(self, u"checker_initiator_tag", None) is None:
947
return
948
# Reschedule checker run
949
gobject.source_remove(self.checker_initiator_tag)
950
self.checker_initiator_tag = (gobject.timeout_add
951
(value, self.start_checker))
952
self.start_checker() # Start one now, too
953
954
# checker - property
955
@dbus_service_property(_interface, signature=u"s",
956
access=u"readwrite")
957
def checker_dbus_property(self, value=None):
958
if value is None: # get
959
return dbus.String(self.checker_command)
960
self.checker_command = value
961
# Emit D-Bus signal
962
self.PropertyChanged(dbus.String(u"checker"),
963
dbus.String(self.checker_command,
964
variant_level=1))
965
966
# checker_running - property
967
@dbus_service_property(_interface, signature=u"b",
968
access=u"readwrite")
969
def checker_running_dbus_property(self, value=None):
970
if value is None: # get
971
return dbus.Boolean(self.checker is not None)
972
if value:
973
self.start_checker()
974
else:
975
self.stop_checker()
976
977
# object_path - property
978
@dbus_service_property(_interface, signature=u"o", access=u"read")
979
def object_path_dbus_property(self):
980
return self.dbus_object_path # is already a dbus.ObjectPath
981
982
# secret = property
983
@dbus_service_property(_interface, signature=u"ay",
984
access=u"write", byte_arrays=True)
985
def secret_dbus_property(self, value):
986
self.secret = str(value)
987
988
del _interface
989
990
991
class ClientHandler(socketserver.BaseRequestHandler, object):
992
"""A class to handle client connections.
993
994
Instantiated once for each connection to handle it.
427
995
Note: This will run in its own forked process."""
428
996
429
997
def handle(self):
430
998
logger.info(u"TCP connection from: %s",
431
unicode(self.client_address))
432
session = gnutls.connection.ClientSession\
433
(self.request, gnutls.connection.X509Credentials())
434
435
line = self.request.makefile().readline()
436
logger.debug(u"Protocol version: %r", line)
437
try:
438
if int(line.strip().split()[0]) > 1:
439
raise RuntimeError
440
except (ValueError, IndexError, RuntimeError), error:
441
logger.error(u"Unknown protocol version: %s", error)
442
return
443
444
# Note: gnutls.connection.X509Credentials is really a generic
445
# GnuTLS certificate credentials object so long as no X.509
446
# keys are added to it. Therefore, we can use it here despite
447
# using OpenPGP certificates.
448
449
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
450
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
451
# "+DHE-DSS"))
452
priority = "NORMAL" # Fallback default, since this
453
# MUST be set.
454
if self.server.settings["priority"]:
455
priority = self.server.settings["priority"]
456
gnutls.library.functions.gnutls_priority_set_direct\
457
(session._c_object, priority, None);
458
459
try:
460
session.handshake()
461
except gnutls.errors.GNUTLSError, error:
462
logger.warning(u"Handshake failed: %s", error)
463
# Do not run session.bye() here: the session is not
464
# established. Just abandon the request.
465
return
466
try:
467
fpr = fingerprint(peer_certificate(session))
468
except (TypeError, gnutls.errors.GNUTLSError), error:
469
logger.warning(u"Bad certificate: %s", error)
470
session.bye()
471
return
472
logger.debug(u"Fingerprint: %s", fpr)
473
client = None
474
for c in self.server.clients:
475
if c.fingerprint == fpr:
476
client = c
477
break
478
if not client:
479
logger.warning(u"Client not found for fingerprint: %s",
480
fpr)
481
session.bye()
482
return
483
# Have to check if client.still_valid(), since it is possible
484
# that the client timed out while establishing the GnuTLS
485
# session.
486
if not client.still_valid():
487
logger.warning(u"Client %(name)s is invalid",
488
vars(client))
489
session.bye()
490
return
491
sent_size = 0
492
while sent_size < len(client.secret):
493
sent = session.send(client.secret[sent_size:])
494
logger.debug(u"Sent: %d, remaining: %d",
495
sent, len(client.secret)
496
- (sent_size + sent))
497
sent_size += sent
498
session.bye()
499
500
501
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
502
"""IPv6 TCP server. Accepts 'None' as address and/or port.
999
unicode(self.client_address))
1000
logger.debug(u"IPC Pipe FD: %d",
1001
self.server.child_pipe[1].fileno())
1002
# Open IPC pipe to parent process
1003
with contextlib.nested(self.server.child_pipe[1],
1004
self.server.parent_pipe[0]
1005
) as (ipc, ipc_return):
1006
session = (gnutls.connection
1007
.ClientSession(self.request,
1008
gnutls.connection
1009
.X509Credentials()))
1010
1011
# Note: gnutls.connection.X509Credentials is really a
1012
# generic GnuTLS certificate credentials object so long as
1013
# no X.509 keys are added to it. Therefore, we can use it
1014
# here despite using OpenPGP certificates.
1015
1016
#priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
1017
# u"+AES-256-CBC", u"+SHA1",
1018
# u"+COMP-NULL", u"+CTYPE-OPENPGP",
1019
# u"+DHE-DSS"))
1020
# Use a fallback default, since this MUST be set.
1021
priority = self.server.gnutls_priority
1022
if priority is None:
1023
priority = u"NORMAL"
1024
(gnutls.library.functions
1025
.gnutls_priority_set_direct(session._c_object,
1026
priority, None))
1027
1028
# Start communication using the Mandos protocol
1029
# Get protocol number
1030
line = self.request.makefile().readline()
1031
logger.debug(u"Protocol version: %r", line)
1032
try:
1033
if int(line.strip().split()[0]) > 1:
1034
raise RuntimeError
1035
except (ValueError, IndexError, RuntimeError), error:
1036
logger.error(u"Unknown protocol version: %s", error)
1037
return
1038
1039
# Start GnuTLS connection
1040
try:
1041
session.handshake()
1042
except gnutls.errors.GNUTLSError, error:
1043
logger.warning(u"Handshake failed: %s", error)
1044
# Do not run session.bye() here: the session is not
1045
# established. Just abandon the request.
1046
return
1047
logger.debug(u"Handshake succeeded")
1048
try:
1049
try:
1050
fpr = self.fingerprint(self.peer_certificate
1051
(session))
1052
except (TypeError, gnutls.errors.GNUTLSError), error:
1053
logger.warning(u"Bad certificate: %s", error)
1054
return
1055
logger.debug(u"Fingerprint: %s", fpr)
1056
1057
for c in self.server.clients:
1058
if c.fingerprint == fpr:
1059
client = c
1060
break
1061
else:
1062
ipc.write(u"NOTFOUND %s %s\n"
1063
% (fpr, unicode(self.client_address)))
1064
return
1065
1066
class ClientProxy(object):
1067
"""Client proxy object. Not for calling methods."""
1068
def __init__(self, client):
1069
self.client = client
1070
def __getattr__(self, name):
1071
if name.startswith("ipc_"):
1072
def tempfunc():
1073
ipc.write("%s %s\n" % (name[4:].upper(),
1074
self.client.name))
1075
return tempfunc
1076
if not hasattr(self.client, name):
1077
raise AttributeError
1078
ipc.write(u"GETATTR %s %s\n"
1079
% (name, self.client.fingerprint))
1080
return pickle.load(ipc_return)
1081
clientproxy = ClientProxy(client)
1082
# Have to check if client.enabled, since it is
1083
# possible that the client was disabled since the
1084
# GnuTLS session was established.
1085
if not clientproxy.enabled:
1086
clientproxy.ipc_disabled()
1087
return
1088
1089
clientproxy.ipc_sending()
1090
sent_size = 0
1091
while sent_size < len(client.secret):
1092
sent = session.send(client.secret[sent_size:])
1093
logger.debug(u"Sent: %d, remaining: %d",
1094
sent, len(client.secret)
1095
- (sent_size + sent))
1096
sent_size += sent
1097
finally:
1098
session.bye()
1099
1100
@staticmethod
1101
def peer_certificate(session):
1102
"Return the peer's OpenPGP certificate as a bytestring"
1103
# If not an OpenPGP certificate...
1104
if (gnutls.library.functions
1105
.gnutls_certificate_type_get(session._c_object)
1106
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1107
# ...do the normal thing
1108
return session.peer_certificate
1109
list_size = ctypes.c_uint(1)
1110
cert_list = (gnutls.library.functions
1111
.gnutls_certificate_get_peers
1112
(session._c_object, ctypes.byref(list_size)))
1113
if not bool(cert_list) and list_size.value != 0:
1114
raise gnutls.errors.GNUTLSError(u"error getting peer"
1115
u" certificate")
1116
if list_size.value == 0:
1117
return None
1118
cert = cert_list[0]
1119
return ctypes.string_at(cert.data, cert.size)
1120
1121
@staticmethod
1122
def fingerprint(openpgp):
1123
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1124
# New GnuTLS "datum" with the OpenPGP public key
1125
datum = (gnutls.library.types
1126
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1127
ctypes.POINTER
1128
(ctypes.c_ubyte)),
1129
ctypes.c_uint(len(openpgp))))
1130
# New empty GnuTLS certificate
1131
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1132
(gnutls.library.functions
1133
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1134
# Import the OpenPGP public key into the certificate
1135
(gnutls.library.functions
1136
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1137
gnutls.library.constants
1138
.GNUTLS_OPENPGP_FMT_RAW))
1139
# Verify the self signature in the key
1140
crtverify = ctypes.c_uint()
1141
(gnutls.library.functions
1142
.gnutls_openpgp_crt_verify_self(crt, 0,
1143
ctypes.byref(crtverify)))
1144
if crtverify.value != 0:
1145
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1146
raise (gnutls.errors.CertificateSecurityError
1147
(u"Verify failed"))
1148
# New buffer for the fingerprint
1149
buf = ctypes.create_string_buffer(20)
1150
buf_len = ctypes.c_size_t()
1151
# Get the fingerprint from the certificate into the buffer
1152
(gnutls.library.functions
1153
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1154
ctypes.byref(buf_len)))
1155
# Deinit the certificate
1156
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1157
# Convert the buffer to a Python bytestring
1158
fpr = ctypes.string_at(buf, buf_len.value)
1159
# Convert the bytestring to hexadecimal notation
1160
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
1161
return hex_fpr
1162
1163
1164
class ForkingMixInWithPipes(socketserver.ForkingMixIn, object):
1165
"""Like socketserver.ForkingMixIn, but also pass a pipe pair."""
1166
def process_request(self, request, client_address):
1167
"""Overrides and wraps the original process_request().
1168
1169
This function creates a new pipe in self.pipe
1170
"""
1171
# Child writes to child_pipe
1172
self.child_pipe = map(os.fdopen, os.pipe(), u"rw", (1, 0))
1173
# Parent writes to parent_pipe
1174
self.parent_pipe = map(os.fdopen, os.pipe(), u"rw", (1, 0))
1175
super(ForkingMixInWithPipes,
1176
self).process_request(request, client_address)
1177
# Close unused ends for parent
1178
self.parent_pipe[0].close() # close read end
1179
self.child_pipe[1].close() # close write end
1180
self.add_pipe_fds(self.child_pipe[0], self.parent_pipe[1])
1181
def add_pipe_fds(self, child_pipe_fd, parent_pipe_fd):
1182
"""Dummy function; override as necessary"""
1183
child_pipe_fd.close()
1184
parent_pipe_fd.close()
1185
1186
1187
class IPv6_TCPServer(ForkingMixInWithPipes,
1188
socketserver.TCPServer, object):
1189
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1190
503
1191
Attributes:
504
settings: Server settings
505
clients: Set() of Client objects
1192
enabled: Boolean; whether this server is activated yet
1193
interface: None or a network interface name (string)
1194
use_ipv6: Boolean; to use IPv6 or not
506
1195
"""
507
address_family = socket.AF_INET6
508
def __init__(self, *args, **kwargs):
509
if "settings" in kwargs:
510
self.settings = kwargs["settings"]
511
del kwargs["settings"]
512
if "clients" in kwargs:
513
self.clients = kwargs["clients"]
514
del kwargs["clients"]
515
return super(type(self), self).__init__(*args, **kwargs)
1196
def __init__(self, server_address, RequestHandlerClass,
1197
interface=None, use_ipv6=True):
1198
self.interface = interface
1199
if use_ipv6:
1200
self.address_family = socket.AF_INET6
1201
socketserver.TCPServer.__init__(self, server_address,
1202
RequestHandlerClass)
516
1203
def server_bind(self):
517
1204
"""This overrides the normal server_bind() function
518
1205
to bind to an interface if one was specified, and also NOT to
519
1206
bind to an address or port if they were not specified."""
520
if self.settings["interface"]:
521
# 25 is from /usr/include/asm-i486/socket.h
522
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
523
try:
524
self.socket.setsockopt(socket.SOL_SOCKET,
525
SO_BINDTODEVICE,
526
self.settings["interface"])
527
except socket.error, error:
528
if error[0] == errno.EPERM:
529
logger.error(u"No permission to"
530
u" bind to interface %s",
531
self.settings["interface"])
532
else:
533
raise error
1207
if self.interface is not None:
1208
if SO_BINDTODEVICE is None:
1209
logger.error(u"SO_BINDTODEVICE does not exist;"
1210
u" cannot bind to interface %s",
1211
self.interface)
1212
else:
1213
try:
1214
self.socket.setsockopt(socket.SOL_SOCKET,
1215
SO_BINDTODEVICE,
1216
str(self.interface
1217
+ u'\0'))
1218
except socket.error, error:
1219
if error[0] == errno.EPERM:
1220
logger.error(u"No permission to"
1221
u" bind to interface %s",
1222
self.interface)
1223
elif error[0] == errno.ENOPROTOOPT:
1224
logger.error(u"SO_BINDTODEVICE not available;"
1225
u" cannot bind to interface %s",
1226
self.interface)
1227
else:
1228
raise
534
1229
# Only bind(2) the socket if we really need to.
535
1230
if self.server_address[0] or self.server_address[1]:
536
1231
if not self.server_address[0]:
537
in6addr_any = "::"
538
self.server_address = (in6addr_any,
1232
if self.address_family == socket.AF_INET6:
1233
any_address = u"::" # in6addr_any
1234
else:
1235
any_address = socket.INADDR_ANY
1236
self.server_address = (any_address,
539
1237
self.server_address[1])
540
1238
elif not self.server_address[1]:
541
1239
self.server_address = (self.server_address[0],
542
1240
0)
543
# if self.settings["interface"]:
1241
# if self.interface:
544
1242
# self.server_address = (self.server_address[0],
545
1243
# 0, # port
546
1244
# 0, # flowinfo
547
1245
# if_nametoindex
548
# (self.settings
549
# ["interface"]))
550
return super(type(self), self).server_bind()
1246
# (self.interface))
1247
return socketserver.TCPServer.server_bind(self)
1248
1249
1250
class MandosServer(IPv6_TCPServer):
1251
"""Mandos server.
1252
1253
Attributes:
1254
clients: set of Client objects
1255
gnutls_priority GnuTLS priority string
1256
use_dbus: Boolean; to emit D-Bus signals or not
1257
1258
Assumes a gobject.MainLoop event loop.
1259
"""
1260
def __init__(self, server_address, RequestHandlerClass,
1261
interface=None, use_ipv6=True, clients=None,
1262
gnutls_priority=None, use_dbus=True):
1263
self.enabled = False
1264
self.clients = clients
1265
if self.clients is None:
1266
self.clients = set()
1267
self.use_dbus = use_dbus
1268
self.gnutls_priority = gnutls_priority
1269
IPv6_TCPServer.__init__(self, server_address,
1270
RequestHandlerClass,
1271
interface = interface,
1272
use_ipv6 = use_ipv6)
1273
def server_activate(self):
1274
if self.enabled:
1275
return socketserver.TCPServer.server_activate(self)
1276
def enable(self):
1277
self.enabled = True
1278
def add_pipe_fds(self, child_pipe_fd, parent_pipe_fd):
1279
# Call "handle_ipc" for both data and EOF events
1280
gobject.io_add_watch(child_pipe_fd.fileno(),
1281
gobject.IO_IN | gobject.IO_HUP,
1282
functools.partial(self.handle_ipc,
1283
reply = parent_pipe_fd,
1284
sender= child_pipe_fd))
1285
def handle_ipc(self, source, condition, reply=None, sender=None):
1286
condition_names = {
1287
gobject.IO_IN: u"IN", # There is data to read.
1288
gobject.IO_OUT: u"OUT", # Data can be written (without
1289
# blocking).
1290
gobject.IO_PRI: u"PRI", # There is urgent data to read.
1291
gobject.IO_ERR: u"ERR", # Error condition.
1292
gobject.IO_HUP: u"HUP" # Hung up (the connection has been
1293
# broken, usually for pipes and
1294
# sockets).
1295
}
1296
conditions_string = ' | '.join(name
1297
for cond, name in
1298
condition_names.iteritems()
1299
if cond & condition)
1300
logger.debug(u"Handling IPC: FD = %d, condition = %s", source,
1301
conditions_string)
1302
1303
# Read a line from the file object
1304
cmdline = sender.readline()
1305
if not cmdline: # Empty line means end of file
1306
# close the IPC pipes
1307
sender.close()
1308
reply.close()
1309
1310
# Stop calling this function
1311
return False
1312
1313
logger.debug(u"IPC command: %r", cmdline)
1314
1315
# Parse and act on command
1316
cmd, args = cmdline.rstrip(u"\r\n").split(None, 1)
1317
1318
if cmd == u"NOTFOUND":
1319
fpr, address = args.split(None, 1)
1320
logger.warning(u"Client not found for fingerprint: %s, ad"
1321
u"dress: %s", fpr, address)
1322
if self.use_dbus:
1323
# Emit D-Bus signal
1324
mandos_dbus_service.ClientNotFound(fpr, address)
1325
elif cmd == u"DISABLED":
1326
for client in self.clients:
1327
if client.name == args:
1328
logger.warning(u"Client %s is disabled", args)
1329
if self.use_dbus:
1330
# Emit D-Bus signal
1331
client.Rejected()
1332
break
1333
else:
1334
logger.error(u"Unknown client %s is disabled", args)
1335
elif cmd == u"SENDING":
1336
for client in self.clients:
1337
if client.name == args:
1338
logger.info(u"Sending secret to %s", client.name)
1339
client.checked_ok()
1340
if self.use_dbus:
1341
# Emit D-Bus signal
1342
client.GotSecret()
1343
break
1344
else:
1345
logger.error(u"Sending secret to unknown client %s",
1346
args)
1347
elif cmd == u"GETATTR":
1348
attr_name, fpr = args.split(None, 1)
1349
for client in self.clients:
1350
if client.fingerprint == fpr:
1351
attr_value = getattr(client, attr_name, None)
1352
logger.debug("IPC reply: %r", attr_value)
1353
pickle.dump(attr_value, reply)
1354
break
1355
else:
1356
logger.error(u"Client %s on address %s requesting "
1357
u"attribute %s not found", fpr, address,
1358
attr_name)
1359
pickle.dump(None, reply)
1360
else:
1361
logger.error(u"Unknown IPC command: %r", cmdline)
1362
1363
# Keep calling this function
1364
return True
551
1365
552
1366
553
1367
def string_to_delta(interval):
554
1368
"""Parse a string and return a datetime.timedelta
555
556
>>> string_to_delta('7d')
1369
1370
>>> string_to_delta(u'7d')
557
1371
datetime.timedelta(7)
558
>>> string_to_delta('60s')
1372
>>> string_to_delta(u'60s')
559
1373
datetime.timedelta(0, 60)
560
>>> string_to_delta('60m')
1374
>>> string_to_delta(u'60m')
561
1375
datetime.timedelta(0, 3600)
562
>>> string_to_delta('24h')
1376
>>> string_to_delta(u'24h')
563
1377
datetime.timedelta(1)
564
1378
>>> string_to_delta(u'1w')
565
1379
datetime.timedelta(7)
1380
>>> string_to_delta(u'5m 30s')
1381
datetime.timedelta(0, 330)
566
1382
"""
567
try:
568
suffix=unicode(interval[-1])
569
value=int(interval[:-1])
570
if suffix == u"d":
571
delta = datetime.timedelta(value)
572
elif suffix == u"s":
573
delta = datetime.timedelta(0, value)
574
elif suffix == u"m":
575
delta = datetime.timedelta(0, 0, 0, 0, value)
576
elif suffix == u"h":
577
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
578
elif suffix == u"w":
579
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
580
else:
581
raise ValueError
582
except (ValueError, IndexError):
583
raise ValueError
584
return delta
585
586
587
def server_state_changed(state):
588
"""Derived from the Avahi example code"""
589
if state == avahi.SERVER_COLLISION:
590
logger.error(u"Server name collision")
591
service.remove()
592
elif state == avahi.SERVER_RUNNING:
593
service.add()
594
595
596
def entry_group_state_changed(state, error):
597
"""Derived from the Avahi example code"""
598
logger.debug(u"state change: %i", state)
599
600
if state == avahi.ENTRY_GROUP_ESTABLISHED:
601
logger.debug(u"Service established.")
602
elif state == avahi.ENTRY_GROUP_COLLISION:
603
logger.warning(u"Service name collision.")
604
service.rename()
605
elif state == avahi.ENTRY_GROUP_FAILURE:
606
logger.critical(u"Error in group state changed %s",
607
unicode(error))
608
raise AvahiGroupError("State changed: %s", str(error))
1383
timevalue = datetime.timedelta(0)
1384
for s in interval.split():
1385
try:
1386
suffix = unicode(s[-1])
1387
value = int(s[:-1])
1388
if suffix == u"d":
1389
delta = datetime.timedelta(value)
1390
elif suffix == u"s":
1391
delta = datetime.timedelta(0, value)
1392
elif suffix == u"m":
1393
delta = datetime.timedelta(0, 0, 0, 0, value)
1394
elif suffix == u"h":
1395
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
1396
elif suffix == u"w":
1397
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1398
else:
1399
raise ValueError(u"Unknown suffix %r" % suffix)
1400
except (ValueError, IndexError), e:
1401
raise ValueError(e.message)
1402
timevalue += delta
1403
return timevalue
1404
609
1405
610
1406
def if_nametoindex(interface):
611
"""Call the C function if_nametoindex(), or equivalent"""
1407
"""Call the C function if_nametoindex(), or equivalent
1408
1409
Note: This function cannot accept a unicode string."""
612
1410
global if_nametoindex
613
1411
try:
614
if "ctypes.util" not in sys.modules:
615
import ctypes.util
616
if_nametoindex = ctypes.cdll.LoadLibrary\
617
(ctypes.util.find_library("c")).if_nametoindex
1412
if_nametoindex = (ctypes.cdll.LoadLibrary
1413
(ctypes.util.find_library(u"c"))
1414
.if_nametoindex)
618
1415
except (OSError, AttributeError):
619
if "struct" not in sys.modules:
620
import struct
621
if "fcntl" not in sys.modules:
622
import fcntl
1416
logger.warning(u"Doing if_nametoindex the hard way")
623
1417
def if_nametoindex(interface):
624
1418
"Get an interface index the hard way, i.e. using fcntl()"
625
1419
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
626
s = socket.socket()
627
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
628
struct.pack("16s16x", interface))
629
s.close()
630
interface_index = struct.unpack("I", ifreq[16:20])[0]
1420
with contextlib.closing(socket.socket()) as s:
1421
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1422
struct.pack(str(u"16s16x"),
1423
interface))
1424
interface_index = struct.unpack(str(u"I"),
1425
ifreq[16:20])[0]
631
1426
return interface_index
632
1427
return if_nametoindex(interface)
633
1428
634
1429
635
1430
def daemon(nochdir = False, noclose = False):
636
1431
"""See daemon(3). Standard BSD Unix function.
1432
637
1433
This should really exist as os.daemon, but it doesn't (yet)."""
638
1434
if os.fork():
639
1435
sys.exit()
640
1436
os.setsid()
641
1437
if not nochdir:
642
os.chdir("/")
1438
os.chdir(u"/")
643
1439
if os.fork():
644
1440
sys.exit()
645
1441
if not noclose:
647
1443
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
648
1444
if not stat.S_ISCHR(os.fstat(null).st_mode):
649
1445
raise OSError(errno.ENODEV,
650
"/dev/null not a character device")
1446
u"%s not a character device"
1447
% os.path.devnull)
651
1448
os.dup2(null, sys.stdin.fileno())
652
1449
os.dup2(null, sys.stdout.fileno())
653
1450
os.dup2(null, sys.stderr.fileno())
656
1453
657
1454
658
1455
def main():
659
global main_loop_started
660
main_loop_started = False
661
662
parser = OptionParser(version = "%%prog %s" % version)
663
parser.add_option("-i", "--interface", type="string",
664
metavar="IF", help="Bind to interface IF")
665
parser.add_option("-a", "--address", type="string",
666
help="Address to listen for requests on")
667
parser.add_option("-p", "--port", type="int",
668
help="Port number to receive requests on")
669
parser.add_option("--check", action="store_true", default=False,
670
help="Run self-test")
671
parser.add_option("--debug", action="store_true",
672
help="Debug mode; run in foreground and log to"
673
" terminal")
674
parser.add_option("--priority", type="string", help="GnuTLS"
675
" priority string (see GnuTLS documentation)")
676
parser.add_option("--servicename", type="string", metavar="NAME",
677
help="Zeroconf service name")
678
parser.add_option("--configdir", type="string",
679
default="/etc/mandos", metavar="DIR",
680
help="Directory to search for configuration"
681
" files")
682
(options, args) = parser.parse_args()
1456
1457
##################################################################
1458
# Parsing of options, both command line and config file
1459
1460
parser = optparse.OptionParser(version = "%%prog %s" % version)
1461
parser.add_option("-i", u"--interface", type=u"string",
1462
metavar="IF", help=u"Bind to interface IF")
1463
parser.add_option("-a", u"--address", type=u"string",
1464
help=u"Address to listen for requests on")
1465
parser.add_option("-p", u"--port", type=u"int",
1466
help=u"Port number to receive requests on")
1467
parser.add_option("--check", action=u"store_true",
1468
help=u"Run self-test")
1469
parser.add_option("--debug", action=u"store_true",
1470
help=u"Debug mode; run in foreground and log to"
1471
u" terminal")
1472
parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1473
u" priority string (see GnuTLS documentation)")
1474
parser.add_option("--servicename", type=u"string",
1475
metavar=u"NAME", help=u"Zeroconf service name")
1476
parser.add_option("--configdir", type=u"string",
1477
default=u"/etc/mandos", metavar=u"DIR",
1478
help=u"Directory to search for configuration"
1479
u" files")
1480
parser.add_option("--no-dbus", action=u"store_false",
1481
dest=u"use_dbus", help=u"Do not provide D-Bus"
1482
u" system bus interface")
1483
parser.add_option("--no-ipv6", action=u"store_false",
1484
dest=u"use_ipv6", help=u"Do not use IPv6")
1485
options = parser.parse_args()[0]
683
1486
684
1487
if options.check:
685
1488
import doctest
687
1490
sys.exit()
688
1491
689
1492
# Default values for config file for server-global settings
690
server_defaults = { "interface": "",
691
"address": "",
692
"port": "",
693
"debug": "False",
694
"priority":
695
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
696
"servicename": "Mandos",
1493
server_defaults = { u"interface": u"",
1494
u"address": u"",
1495
u"port": u"",
1496
u"debug": u"False",
1497
u"priority":
1498
u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1499
u"servicename": u"Mandos",
1500
u"use_dbus": u"True",
1501
u"use_ipv6": u"True",
697
1502
}
698
1503
699
1504
# Parse config file for server-global settings
700
server_config = ConfigParser.SafeConfigParser(server_defaults)
1505
server_config = configparser.SafeConfigParser(server_defaults)
701
1506
del server_defaults
702
server_config.read(os.path.join(options.configdir, "mandos.conf"))
703
server_section = "server"
1507
server_config.read(os.path.join(options.configdir,
1508
u"mandos.conf"))
704
1509
# Convert the SafeConfigParser object to a dict
705
server_settings = dict(server_config.items(server_section))
706
# Use getboolean on the boolean config option
707
server_settings["debug"] = server_config.getboolean\
708
(server_section, "debug")
1510
server_settings = server_config.defaults()
1511
# Use the appropriate methods on the non-string config options
1512
for option in (u"debug", u"use_dbus", u"use_ipv6"):
1513
server_settings[option] = server_config.getboolean(u"DEFAULT",
1514
option)
1515
if server_settings["port"]:
1516
server_settings["port"] = server_config.getint(u"DEFAULT",
1517
u"port")
709
1518
del server_config
710
1519
711
1520
# Override the settings from the config file with command line
712
1521
# options, if set.
713
for option in ("interface", "address", "port", "debug",
714
"priority", "servicename", "configdir"):
1522
for option in (u"interface", u"address", u"port", u"debug",
1523
u"priority", u"servicename", u"configdir",
1524
u"use_dbus", u"use_ipv6"):
715
1525
value = getattr(options, option)
716
1526
if value is not None:
717
1527
server_settings[option] = value
718
1528
del options
1529
# Force all strings to be unicode
1530
for option in server_settings.keys():
1531
if type(server_settings[option]) is str:
1532
server_settings[option] = unicode(server_settings[option])
719
1533
# Now we have our good server settings in "server_settings"
720
1534
721
debug = server_settings["debug"]
1535
##################################################################
1536
1537
# For convenience
1538
debug = server_settings[u"debug"]
1539
use_dbus = server_settings[u"use_dbus"]
1540
use_ipv6 = server_settings[u"use_ipv6"]
722
1541
723
1542
if not debug:
724
1543
syslogger.setLevel(logging.WARNING)
725
1544
console.setLevel(logging.WARNING)
726
1545
727
if server_settings["servicename"] != "Mandos":
728
syslogger.setFormatter(logging.Formatter\
729
('Mandos (%s): %%(levelname)s:'
730
' %%(message)s'
731
% server_settings["servicename"]))
1546
if server_settings[u"servicename"] != u"Mandos":
1547
syslogger.setFormatter(logging.Formatter
1548
(u'Mandos (%s) [%%(process)d]:'
1549
u' %%(levelname)s: %%(message)s'
1550
% server_settings[u"servicename"]))
732
1551
733
1552
# Parse config file with clients
734
client_defaults = { "timeout": "1h",
735
"interval": "5m",
736
"checker": "fping -q -- %%(host)s",
1553
client_defaults = { u"timeout": u"1h",
1554
u"interval": u"5m",
1555
u"checker": u"fping -q -- %%(host)s",
1556
u"host": u"",
737
1557
}
738
client_config = ConfigParser.SafeConfigParser(client_defaults)
739
client_config.read(os.path.join(server_settings["configdir"],
740
"clients.conf"))
741
742
global service
743
service = AvahiService(name = server_settings["servicename"],
744
type = "_mandos._tcp", );
745
if server_settings["interface"]:
746
service.interface = if_nametoindex(server_settings["interface"])
1558
client_config = configparser.SafeConfigParser(client_defaults)
1559
client_config.read(os.path.join(server_settings[u"configdir"],
1560
u"clients.conf"))
1561
1562
global mandos_dbus_service
1563
mandos_dbus_service = None
1564
1565
tcp_server = MandosServer((server_settings[u"address"],
1566
server_settings[u"port"]),
1567
ClientHandler,
1568
interface=(server_settings[u"interface"]
1569
or None),
1570
use_ipv6=use_ipv6,
1571
gnutls_priority=
1572
server_settings[u"priority"],
1573
use_dbus=use_dbus)
1574
pidfilename = u"/var/run/mandos.pid"
1575
try:
1576
pidfile = open(pidfilename, u"w")
1577
except IOError:
1578
logger.error(u"Could not open file %r", pidfilename)
1579
1580
try:
1581
uid = pwd.getpwnam(u"_mandos").pw_uid
1582
gid = pwd.getpwnam(u"_mandos").pw_gid
1583
except KeyError:
1584
try:
1585
uid = pwd.getpwnam(u"mandos").pw_uid
1586
gid = pwd.getpwnam(u"mandos").pw_gid
1587
except KeyError:
1588
try:
1589
uid = pwd.getpwnam(u"nobody").pw_uid
1590
gid = pwd.getpwnam(u"nobody").pw_gid
1591
except KeyError:
1592
uid = 65534
1593
gid = 65534
1594
try:
1595
os.setgid(gid)
1596
os.setuid(uid)
1597
except OSError, error:
1598
if error[0] != errno.EPERM:
1599
raise error
1600
1601
# Enable all possible GnuTLS debugging
1602
if debug:
1603
# "Use a log level over 10 to enable all debugging options."
1604
# - GnuTLS manual
1605
gnutls.library.functions.gnutls_global_set_log_level(11)
1606
1607
@gnutls.library.types.gnutls_log_func
1608
def debug_gnutls(level, string):
1609
logger.debug(u"GnuTLS: %s", string[:-1])
1610
1611
(gnutls.library.functions
1612
.gnutls_global_set_log_function(debug_gnutls))
747
1613
748
1614
global main_loop
749
global bus
750
global server
751
1615
# From the Avahi example code
752
1616
DBusGMainLoop(set_as_default=True )
753
1617
main_loop = gobject.MainLoop()
754
1618
bus = dbus.SystemBus()
755
server = dbus.Interface(
756
bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
757
avahi.DBUS_INTERFACE_SERVER )
758
1619
# End of Avahi example code
759
760
clients = Set()
761
def remove_from_clients(client):
762
clients.remove(client)
763
if not clients:
764
logger.critical(u"No clients left, exiting")
765
sys.exit()
766
767
clients.update(Set(Client(name = section,
768
stop_hook = remove_from_clients,
769
config
770
= dict(client_config.items(section)))
771
for section in client_config.sections()))
772
if not clients:
773
logger.critical(u"No clients defined")
774
sys.exit(1)
775
776
if not debug:
1620
if use_dbus:
1621
try:
1622
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos",
1623
bus, do_not_queue=True)
1624
except dbus.exceptions.NameExistsException, e:
1625
logger.error(unicode(e) + u", disabling D-Bus")
1626
use_dbus = False
1627
server_settings[u"use_dbus"] = False
1628
tcp_server.use_dbus = False
1629
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1630
service = AvahiService(name = server_settings[u"servicename"],
1631
servicetype = u"_mandos._tcp",
1632
protocol = protocol, bus = bus)
1633
if server_settings["interface"]:
1634
service.interface = (if_nametoindex
1635
(str(server_settings[u"interface"])))
1636
1637
client_class = Client
1638
if use_dbus:
1639
client_class = functools.partial(ClientDBus, bus = bus)
1640
tcp_server.clients.update(set(
1641
client_class(name = section,
1642
config= dict(client_config.items(section)))
1643
for section in client_config.sections()))
1644
if not tcp_server.clients:
1645
logger.warning(u"No clients defined")
1646
1647
if debug:
1648
# Redirect stdin so all checkers get /dev/null
1649
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1650
os.dup2(null, sys.stdin.fileno())
1651
if null > 2:
1652
os.close(null)
1653
else:
1654
# No console logging
777
1655
logger.removeHandler(console)
1656
# Close all input and output, do double fork, etc.
778
1657
daemon()
779
1658
780
pidfilename = "/var/run/mandos/mandos.pid"
781
pid = os.getpid()
782
1659
try:
783
pidfile = open(pidfilename, "w")
784
pidfile.write(str(pid) + "\n")
785
pidfile.close()
1660
with pidfile:
1661
pid = os.getpid()
1662
pidfile.write(str(pid) + "\n")
786
1663
del pidfile
787
except IOError, err:
788
logger.error(u"Could not write %s file with PID %d",
789
pidfilename, os.getpid())
1664
except IOError:
1665
logger.error(u"Could not write to file %r with PID %d",
1666
pidfilename, pid)
1667
except NameError:
1668
# "pidfile" was never created
1669
pass
1670
del pidfilename
1671
1672
if not debug:
1673
signal.signal(signal.SIGINT, signal.SIG_IGN)
1674
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1675
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1676
1677
if use_dbus:
1678
class MandosDBusService(dbus.service.Object):
1679
"""A D-Bus proxy object"""
1680
def __init__(self):
1681
dbus.service.Object.__init__(self, bus, u"/")
1682
_interface = u"se.bsnet.fukt.Mandos"
1683
1684
@dbus.service.signal(_interface, signature=u"o")
1685
def ClientAdded(self, objpath):
1686
"D-Bus signal"
1687
pass
1688
1689
@dbus.service.signal(_interface, signature=u"ss")
1690
def ClientNotFound(self, fingerprint, address):
1691
"D-Bus signal"
1692
pass
1693
1694
@dbus.service.signal(_interface, signature=u"os")
1695
def ClientRemoved(self, objpath, name):
1696
"D-Bus signal"
1697
pass
1698
1699
@dbus.service.method(_interface, out_signature=u"ao")
1700
def GetAllClients(self):
1701
"D-Bus method"
1702
return dbus.Array(c.dbus_object_path
1703
for c in tcp_server.clients)
1704
1705
@dbus.service.method(_interface,
1706
out_signature=u"a{oa{sv}}")
1707
def GetAllClientsWithProperties(self):
1708
"D-Bus method"
1709
return dbus.Dictionary(
1710
((c.dbus_object_path, c.GetAll(u""))
1711
for c in tcp_server.clients),
1712
signature=u"oa{sv}")
1713
1714
@dbus.service.method(_interface, in_signature=u"o")
1715
def RemoveClient(self, object_path):
1716
"D-Bus method"
1717
for c in tcp_server.clients:
1718
if c.dbus_object_path == object_path:
1719
tcp_server.clients.remove(c)
1720
c.remove_from_connection()
1721
# Don't signal anything except ClientRemoved
1722
c.disable(quiet=True)
1723
# Emit D-Bus signal
1724
self.ClientRemoved(object_path, c.name)
1725
return
1726
raise KeyError(object_path)
1727
1728
del _interface
1729
1730
mandos_dbus_service = MandosDBusService()
790
1731
791
1732
def cleanup():
792
1733
"Cleanup function; run on exit"
793
global group
794
# From the Avahi example code
795
if not group is None:
796
group.Free()
797
group = None
798
# End of Avahi example code
1734
service.cleanup()
799
1735
800
while clients:
801
client = clients.pop()
802
client.stop_hook = None
803
client.stop()
1736
while tcp_server.clients:
1737
client = tcp_server.clients.pop()
1738
if use_dbus:
1739
client.remove_from_connection()
1740
client.disable_hook = None
1741
# Don't signal anything except ClientRemoved
1742
client.disable(quiet=True)
1743
if use_dbus:
1744
# Emit D-Bus signal
1745
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
1746
client.name)
804
1747
805
1748
atexit.register(cleanup)
806
1749
807
if not debug:
808
signal.signal(signal.SIGINT, signal.SIG_IGN)
809
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
810
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
811
812
for client in clients:
813
client.start()
814
815
tcp_server = IPv6_TCPServer((server_settings["address"],
816
server_settings["port"]),
817
tcp_handler,
818
settings=server_settings,
819
clients=clients)
1750
for client in tcp_server.clients:
1751
if use_dbus:
1752
# Emit D-Bus signal
1753
mandos_dbus_service.ClientAdded(client.dbus_object_path)
1754
client.enable()
1755
1756
tcp_server.enable()
1757
tcp_server.server_activate()
1758
820
1759
# Find out what port we got
821
1760
service.port = tcp_server.socket.getsockname()[1]
822
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
823
u" scope_id %d" % tcp_server.socket.getsockname())
1761
if use_ipv6:
1762
logger.info(u"Now listening on address %r, port %d,"
1763
" flowinfo %d, scope_id %d"
1764
% tcp_server.socket.getsockname())
1765
else: # IPv4
1766
logger.info(u"Now listening on address %r, port %d"
1767
% tcp_server.socket.getsockname())
824
1768
825
1769
#service.interface = tcp_server.socket.getsockname()[3]
826
1770
827
1771
try:
828
1772
# From the Avahi example code
829
server.connect_to_signal("StateChanged", server_state_changed)
830
1773
try:
831
server_state_changed(server.GetState())
1774
service.activate()
832
1775
except dbus.exceptions.DBusException, error:
833
1776
logger.critical(u"DBusException: %s", error)
1777
cleanup()
834
1778
sys.exit(1)
835
1779
# End of Avahi example code
836
1780
837
1781
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
838
1782
lambda *args, **kwargs:
839
tcp_server.handle_request\
840
(*args[2:], **kwargs) or True)
1783
(tcp_server.handle_request
1784
(*args[2:], **kwargs) or True))
841
1785
842
1786
logger.debug(u"Starting main loop")
843
main_loop_started = True
844
1787
main_loop.run()
845
1788
except AvahiError, error:
846
logger.critical(u"AvahiError: %s" + unicode(error))
1789
logger.critical(u"AvahiError: %s", error)
1790
cleanup()
847
1791
sys.exit(1)
848
1792
except KeyboardInterrupt:
849
1793
if debug:
850
print
1794
print >> sys.stderr
1795
logger.debug(u"Server received KeyboardInterrupt")
1796
logger.debug(u"Server exiting")
1797
# Must run before the D-Bus bus name gets deregistered
1798
cleanup()
851
1799
852
1800
if __name__ == '__main__':
853
1801
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0