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- Committer: Teddy Hogeborn
- Date: 2008-08-12 19:47:50 UTC
- Revision ID: teddy@fukt.bsnet.se-20080812194750-uebbpk9ynxt3sjnt
* initramfs-tools-hook (gpg): Added "--no-random-seed-file" and
"--no-default-keyring". Bug fix: moved
"--import" to end.
* mandos-keygen (gpg): Added "--no-options".
"--no-default-keyring". Bug fix: moved
"--import" to end.
* mandos-keygen (gpg): Added "--no-options".
- files added:
- network-protocol.txt
- files removed:
- .bzr-builddeb
- debian
- debian/po
- files renamed:
- plugin-runner.c => mandos-client.c
- plugin-runner.xml => mandos-client.xml
- plugins.d/mandos-client.c => plugins.d/password-request.c
- plugins.d/mandos-client.xml => plugins.d/password-request.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", "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
15
#
17
16
# This program is free software: you can redistribute it and/or modify
18
17
# it under the terms of the GNU General Public License as published by
25
24
# GNU General Public License for more details.
26
25
#
27
26
# You should have received a copy of the GNU General Public License
28
# along with this program. If not, see
29
# <http://www.gnu.org/licenses/>.
27
# along with this program. If not, see <http://www.gnu.org/licenses/>.
30
28
#
31
29
# Contact the authors at <mandos@fukt.bsnet.se>.
32
30
#
33
31
34
from __future__ import division, with_statement, absolute_import
32
from __future__ import division
35
33
36
import SocketServer as socketserver
34
import SocketServer
37
35
import socket
38
import optparse
36
import select
37
from optparse import OptionParser
39
38
import datetime
40
39
import errno
41
40
import gnutls.crypto
44
43
import gnutls.library.functions
45
44
import gnutls.library.constants
46
45
import gnutls.library.types
47
import ConfigParser as configparser
46
import ConfigParser
48
47
import sys
49
48
import re
50
49
import os
51
50
import signal
51
from sets import Set
52
52
import subprocess
53
53
import atexit
54
54
import stat
55
55
import logging
56
56
import logging.handlers
57
import pwd
58
import contextlib
59
import struct
60
import fcntl
61
import functools
62
import cPickle as pickle
63
import multiprocessing
64
57
65
58
import dbus
66
import dbus.service
67
59
import gobject
68
60
import avahi
69
61
from dbus.mainloop.glib import DBusGMainLoop
70
62
import ctypes
71
import ctypes.util
72
import xml.dom.minidom
73
import inspect
74
75
try:
76
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
77
except AttributeError:
78
try:
79
from IN import SO_BINDTODEVICE
80
except ImportError:
81
SO_BINDTODEVICE = None
82
83
84
version = "1.0.14"
85
86
logger = logging.Logger(u'mandos')
87
syslogger = (logging.handlers.SysLogHandler
88
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
89
address = "/dev/log"))
90
syslogger.setFormatter(logging.Formatter
91
(u'Mandos [%(process)d]: %(levelname)s:'
92
u' %(message)s'))
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'))
93
72
logger.addHandler(syslogger)
94
73
95
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console = logging.StreamHandler()
96
console.setFormatter(logging.Formatter(u'%(name)s [%(process)d]:'
97
u' %(levelname)s:'
98
u' %(message)s'))
75
console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
76
' %(message)s'))
99
77
logger.addHandler(console)
100
78
101
multiprocessing_manager = multiprocessing.Manager()
102
103
79
class AvahiError(Exception):
104
def __init__(self, value, *args, **kwargs):
80
def __init__(self, value):
105
81
self.value = value
106
super(AvahiError, self).__init__(value, *args, **kwargs)
107
def __unicode__(self):
108
return unicode(repr(self.value))
82
def __str__(self):
83
return repr(self.value)
109
84
110
85
class AvahiServiceError(AvahiError):
111
86
pass
116
91
117
92
class AvahiService(object):
118
93
"""An Avahi (Zeroconf) service.
119
120
94
Attributes:
121
95
interface: integer; avahi.IF_UNSPEC or an interface index.
122
96
Used to optionally bind to the specified interface.
123
name: string; Example: u'Mandos'
124
type: string; Example: u'_mandos._tcp'.
97
name: string; Example: 'Mandos'
98
type: string; Example: '_mandos._tcp'.
125
99
See <http://www.dns-sd.org/ServiceTypes.html>
126
100
port: integer; what port to announce
127
101
TXT: list of strings; TXT record for the service
130
104
max_renames: integer; maximum number of renames
131
105
rename_count: integer; counter so we only rename after collisions
132
106
a sensible number of times
133
group: D-Bus Entry Group
134
server: D-Bus Server
135
bus: dbus.SystemBus()
136
107
"""
137
108
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
138
servicetype = None, port = None, TXT = None,
139
domain = u"", host = u"", max_renames = 32768,
140
protocol = avahi.PROTO_UNSPEC, bus = None):
109
type = None, port = None, TXT = None, domain = "",
110
host = "", max_renames = 32768):
141
111
self.interface = interface
142
112
self.name = name
143
self.type = servicetype
113
self.type = type
144
114
self.port = port
145
self.TXT = TXT if TXT is not None else []
115
if TXT is None:
116
self.TXT = []
117
else:
118
self.TXT = TXT
146
119
self.domain = domain
147
120
self.host = host
148
121
self.rename_count = 0
149
self.max_renames = max_renames
150
self.protocol = protocol
151
self.group = None # our entry group
152
self.server = None
153
self.bus = bus
154
122
def rename(self):
155
123
"""Derived from the Avahi example code"""
156
124
if self.rename_count >= self.max_renames:
157
logger.critical(u"No suitable Zeroconf service name found"
158
u" after %i retries, exiting.",
159
self.rename_count)
160
raise AvahiServiceError(u"Too many renames")
161
self.name = self.server.GetAlternativeServiceName(self.name)
162
logger.info(u"Changing Zeroconf service name to %r ...",
163
unicode(self.name))
164
syslogger.setFormatter(logging.Formatter
165
(u'Mandos (%s) [%%(process)d]:'
166
u' %%(levelname)s: %%(message)s'
167
% self.name))
125
logger.critical(u"No suitable service name found after %i"
126
u" retries, exiting.", rename_count)
127
raise AvahiServiceError("Too many renames")
128
name = server.GetAlternativeServiceName(name)
129
logger.error(u"Changing name to %r ...", name)
130
syslogger.setFormatter(logging.Formatter\
131
('Mandos (%s): %%(levelname)s:'
132
' %%(message)s' % name))
168
133
self.remove()
169
134
self.add()
170
135
self.rename_count += 1
171
136
def remove(self):
172
137
"""Derived from the Avahi example code"""
173
if self.group is not None:
174
self.group.Reset()
138
if group is not None:
139
group.Reset()
175
140
def add(self):
176
141
"""Derived from the Avahi example code"""
177
if self.group is None:
178
self.group = dbus.Interface(
179
self.bus.get_object(avahi.DBUS_NAME,
180
self.server.EntryGroupNew()),
181
avahi.DBUS_INTERFACE_ENTRY_GROUP)
182
self.group.connect_to_signal('StateChanged',
183
self
184
.entry_group_state_changed)
185
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
186
self.name, self.type)
187
self.group.AddService(
188
self.interface,
189
self.protocol,
190
dbus.UInt32(0), # flags
191
self.name, self.type,
192
self.domain, self.host,
193
dbus.UInt16(self.port),
194
avahi.string_array_to_txt_array(self.TXT))
195
self.group.Commit()
196
def entry_group_state_changed(self, state, error):
197
"""Derived from the Avahi example code"""
198
logger.debug(u"Avahi state change: %i", state)
199
200
if state == avahi.ENTRY_GROUP_ESTABLISHED:
201
logger.debug(u"Zeroconf service established.")
202
elif state == avahi.ENTRY_GROUP_COLLISION:
203
logger.warning(u"Zeroconf service name collision.")
204
self.rename()
205
elif state == avahi.ENTRY_GROUP_FAILURE:
206
logger.critical(u"Avahi: Error in group state changed %s",
207
unicode(error))
208
raise AvahiGroupError(u"State changed: %s"
209
% unicode(error))
210
def cleanup(self):
211
"""Derived from the Avahi example code"""
212
if self.group is not None:
213
self.group.Free()
214
self.group = None
215
def server_state_changed(self, state):
216
"""Derived from the Avahi example code"""
217
if state == avahi.SERVER_COLLISION:
218
logger.error(u"Zeroconf server name collision")
219
self.remove()
220
elif state == avahi.SERVER_RUNNING:
221
self.add()
222
def activate(self):
223
"""Derived from the Avahi example code"""
224
if self.server is None:
225
self.server = dbus.Interface(
226
self.bus.get_object(avahi.DBUS_NAME,
227
avahi.DBUS_PATH_SERVER),
228
avahi.DBUS_INTERFACE_SERVER)
229
self.server.connect_to_signal(u"StateChanged",
230
self.server_state_changed)
231
self.server_state_changed(self.server.GetState())
142
global group
143
if group is None:
144
group = dbus.Interface\
145
(bus.get_object(avahi.DBUS_NAME,
146
server.EntryGroupNew()),
147
avahi.DBUS_INTERFACE_ENTRY_GROUP)
148
group.connect_to_signal('StateChanged',
149
entry_group_state_changed)
150
logger.debug(u"Adding service '%s' of type '%s' ...",
151
service.name, service.type)
152
group.AddService(
153
self.interface, # interface
154
avahi.PROTO_INET6, # protocol
155
dbus.UInt32(0), # flags
156
self.name, self.type,
157
self.domain, self.host,
158
dbus.UInt16(self.port),
159
avahi.string_array_to_txt_array(self.TXT))
160
group.Commit()
161
162
# From the Avahi example code:
163
group = None # our entry group
164
# End of Avahi example code
232
165
233
166
234
167
class Client(object):
235
168
"""A representation of a client host served by this server.
236
237
169
Attributes:
238
name: string; from the config file, used in log messages and
239
D-Bus identifiers
170
name: string; from the config file, used in log messages
240
171
fingerprint: string (40 or 32 hexadecimal digits); used to
241
172
uniquely identify the client
242
secret: bytestring; sent verbatim (over TLS) to client
243
host: string; available for use by the checker command
244
created: datetime.datetime(); (UTC) object creation
245
last_enabled: datetime.datetime(); (UTC)
246
enabled: bool()
247
last_checked_ok: datetime.datetime(); (UTC) or None
248
timeout: datetime.timedelta(); How long from last_checked_ok
249
until this client is disabled
250
interval: datetime.timedelta(); How often to start a new checker
251
disable_hook: If set, called by disable() as disable_hook(self)
252
checker: subprocess.Popen(); a running checker process used
253
to see if the client lives.
254
'None' if no process is running.
173
secret: bytestring; sent verbatim (over TLS) to client
174
host: string; available for use by the checker command
175
created: datetime.datetime(); object creation, not client host
176
last_checked_ok: datetime.datetime() or None if not yet checked OK
177
timeout: datetime.timedelta(); How long from last_checked_ok
178
until this client is invalid
179
interval: datetime.timedelta(); How often to start a new checker
180
stop_hook: If set, called by stop() as stop_hook(self)
181
checker: subprocess.Popen(); a running checker process used
182
to see if the client lives.
183
'None' if no process is running.
255
184
checker_initiator_tag: a gobject event source tag, or None
256
disable_initiator_tag: - '' -
185
stop_initiator_tag: - '' -
257
186
checker_callback_tag: - '' -
258
187
checker_command: string; External command which is run to check if
259
188
client lives. %() expansions are done at
260
189
runtime with vars(self) as dict, so that for
261
190
instance %(name)s can be used in the command.
262
current_checker_command: string; current running checker_command
263
approved_delay: datetime.timedelta(); Time to wait for approval
264
_approved: bool(); 'None' if not yet approved/disapproved
265
approved_duration: datetime.timedelta(); Duration of one approval
191
Private attibutes:
192
_timeout: Real variable for 'timeout'
193
_interval: Real variable for 'interval'
194
_timeout_milliseconds: Used when calling gobject.timeout_add()
195
_interval_milliseconds: - '' -
266
196
"""
267
268
@staticmethod
269
def _timedelta_to_milliseconds(td):
270
"Convert a datetime.timedelta() to milliseconds"
271
return ((td.days * 24 * 60 * 60 * 1000)
272
+ (td.seconds * 1000)
273
+ (td.microseconds // 1000))
274
275
def timeout_milliseconds(self):
276
"Return the 'timeout' attribute in milliseconds"
277
return self._timedelta_to_milliseconds(self.timeout)
278
279
def interval_milliseconds(self):
280
"Return the 'interval' attribute in milliseconds"
281
return self._timedelta_to_milliseconds(self.interval)
282
283
def approved_delay_milliseconds(self):
284
return self._timedelta_to_milliseconds(self.approved_delay)
285
286
def __init__(self, name = None, disable_hook=None, config=None):
197
def _set_timeout(self, timeout):
198
"Setter function for 'timeout' attribute"
199
self._timeout = timeout
200
self._timeout_milliseconds = ((self.timeout.days
201
* 24 * 60 * 60 * 1000)
202
+ (self.timeout.seconds * 1000)
203
+ (self.timeout.microseconds
204
// 1000))
205
timeout = property(lambda self: self._timeout,
206
_set_timeout)
207
del _set_timeout
208
def _set_interval(self, interval):
209
"Setter function for 'interval' attribute"
210
self._interval = interval
211
self._interval_milliseconds = ((self.interval.days
212
* 24 * 60 * 60 * 1000)
213
+ (self.interval.seconds
214
* 1000)
215
+ (self.interval.microseconds
216
// 1000))
217
interval = property(lambda self: self._interval,
218
_set_interval)
219
del _set_interval
220
def __init__(self, name = None, stop_hook=None, config={}):
287
221
"""Note: the 'checker' key in 'config' sets the
288
222
'checker_command' attribute and *not* the 'checker'
289
223
attribute."""
290
224
self.name = name
291
if config is None:
292
config = {}
293
225
logger.debug(u"Creating client %r", self.name)
294
226
# Uppercase and remove spaces from fingerprint for later
295
227
# comparison purposes with return value from the fingerprint()
296
228
# function
297
self.fingerprint = (config[u"fingerprint"].upper()
298
.replace(u" ", u""))
229
self.fingerprint = config["fingerprint"].upper()\
230
.replace(u" ", u"")
299
231
logger.debug(u" Fingerprint: %s", self.fingerprint)
300
if u"secret" in config:
301
self.secret = config[u"secret"].decode(u"base64")
302
elif u"secfile" in config:
303
with open(os.path.expanduser(os.path.expandvars
304
(config[u"secfile"])),
305
"rb") as secfile:
306
self.secret = secfile.read()
232
if "secret" in config:
233
self.secret = config["secret"].decode(u"base64")
234
elif "secfile" in config:
235
sf = open(config["secfile"])
236
self.secret = sf.read()
237
sf.close()
307
238
else:
308
#XXX Need to allow secret on demand!
309
239
raise TypeError(u"No secret or secfile for client %s"
310
240
% self.name)
311
self.host = config.get(u"host", u"")
312
self.created = datetime.datetime.utcnow()
313
self.enabled = False
314
self.last_enabled = None
241
self.host = config.get("host", "")
242
self.created = datetime.datetime.now()
315
243
self.last_checked_ok = None
316
self.timeout = string_to_delta(config[u"timeout"])
317
self.interval = string_to_delta(config[u"interval"])
318
self.disable_hook = disable_hook
244
self.timeout = string_to_delta(config["timeout"])
245
self.interval = string_to_delta(config["interval"])
246
self.stop_hook = stop_hook
319
247
self.checker = None
320
248
self.checker_initiator_tag = None
321
self.disable_initiator_tag = None
249
self.stop_initiator_tag = None
322
250
self.checker_callback_tag = None
323
self.checker_command = config[u"checker"]
324
self.current_checker_command = None
325
self.last_connect = None
326
self.approvals_pending = 0
327
self._approved = None
328
self.approved_by_default = config.get(u"approved_by_default",
329
False)
330
self.approved_delay = string_to_delta(
331
config[u"approved_delay"])
332
self.approved_duration = string_to_delta(
333
config[u"approved_duration"])
334
self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())
335
336
def send_changedstate(self):
337
self.changedstate.acquire()
338
self.changedstate.notify_all()
339
self.changedstate.release()
340
341
def enable(self):
251
self.check_command = config["checker"]
252
def start(self):
342
253
"""Start this client's checker and timeout hooks"""
343
if getattr(self, u"enabled", False):
344
# Already enabled
345
return
346
self.send_changedstate()
347
self.last_enabled = datetime.datetime.utcnow()
348
254
# Schedule a new checker to be started an 'interval' from now,
349
255
# and every interval from then on.
350
self.checker_initiator_tag = (gobject.timeout_add
351
(self.interval_milliseconds(),
352
self.start_checker))
353
# Schedule a disable() when 'timeout' has passed
354
self.disable_initiator_tag = (gobject.timeout_add
355
(self.timeout_milliseconds(),
356
self.disable))
357
self.enabled = True
256
self.checker_initiator_tag = gobject.timeout_add\
257
(self._interval_milliseconds,
258
self.start_checker)
358
259
# Also start a new checker *right now*.
359
260
self.start_checker()
360
361
def disable(self, quiet=True):
362
"""Disable this client."""
363
if not getattr(self, "enabled", False):
261
# Schedule a stop() when 'timeout' has passed
262
self.stop_initiator_tag = gobject.timeout_add\
263
(self._timeout_milliseconds,
264
self.stop)
265
def stop(self):
266
"""Stop this client.
267
The possibility that a client might be restarted is left open,
268
but not currently used."""
269
# If this client doesn't have a secret, it is already stopped.
270
if hasattr(self, "secret") and self.secret:
271
logger.info(u"Stopping client %s", self.name)
272
self.secret = None
273
else:
364
274
return False
365
if not quiet:
366
self.send_changedstate()
367
if not quiet:
368
logger.info(u"Disabling client %s", self.name)
369
if getattr(self, u"disable_initiator_tag", False):
370
gobject.source_remove(self.disable_initiator_tag)
371
self.disable_initiator_tag = None
372
if getattr(self, u"checker_initiator_tag", False):
275
if getattr(self, "stop_initiator_tag", False):
276
gobject.source_remove(self.stop_initiator_tag)
277
self.stop_initiator_tag = None
278
if getattr(self, "checker_initiator_tag", False):
373
279
gobject.source_remove(self.checker_initiator_tag)
374
280
self.checker_initiator_tag = None
375
281
self.stop_checker()
376
if self.disable_hook:
377
self.disable_hook(self)
378
self.enabled = False
282
if self.stop_hook:
283
self.stop_hook(self)
379
284
# Do not run this again if called by a gobject.timeout_add
380
285
return False
381
382
286
def __del__(self):
383
self.disable_hook = None
384
self.disable()
385
386
def checker_callback(self, pid, condition, command):
287
self.stop_hook = None
288
self.stop()
289
def checker_callback(self, pid, condition):
387
290
"""The checker has completed, so take appropriate actions."""
291
now = datetime.datetime.now()
388
292
self.checker_callback_tag = None
389
293
self.checker = None
390
if os.WIFEXITED(condition):
391
exitstatus = os.WEXITSTATUS(condition)
392
if exitstatus == 0:
393
logger.info(u"Checker for %(name)s succeeded",
394
vars(self))
395
self.checked_ok()
396
else:
397
logger.info(u"Checker for %(name)s failed",
398
vars(self))
399
else:
294
if os.WIFEXITED(condition) \
295
and (os.WEXITSTATUS(condition) == 0):
296
logger.info(u"Checker for %(name)s succeeded",
297
vars(self))
298
self.last_checked_ok = now
299
gobject.source_remove(self.stop_initiator_tag)
300
self.stop_initiator_tag = gobject.timeout_add\
301
(self._timeout_milliseconds,
302
self.stop)
303
elif not os.WIFEXITED(condition):
400
304
logger.warning(u"Checker for %(name)s crashed?",
401
305
vars(self))
402
403
def checked_ok(self):
404
"""Bump up the timeout for this client.
405
406
This should only be called when the client has been seen,
407
alive and well.
408
"""
409
self.last_checked_ok = datetime.datetime.utcnow()
410
gobject.source_remove(self.disable_initiator_tag)
411
self.disable_initiator_tag = (gobject.timeout_add
412
(self.timeout_milliseconds(),
413
self.disable))
414
306
else:
307
logger.info(u"Checker for %(name)s failed",
308
vars(self))
415
309
def start_checker(self):
416
310
"""Start a new checker subprocess if one is not running.
417
418
311
If a checker already exists, leave it running and do
419
312
nothing."""
420
313
# The reason for not killing a running checker is that if we
423
316
# client would inevitably timeout, since no checker would get
424
317
# a chance to run to completion. If we instead leave running
425
318
# checkers alone, the checker would have to take more time
426
# than 'timeout' for the client to be disabled, which is as it
427
# should be.
428
429
# If a checker exists, make sure it is not a zombie
430
try:
431
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
432
except (AttributeError, OSError), error:
433
if (isinstance(error, OSError)
434
and error.errno != errno.ECHILD):
435
raise error
436
else:
437
if pid:
438
logger.warning(u"Checker was a zombie")
439
gobject.source_remove(self.checker_callback_tag)
440
self.checker_callback(pid, status,
441
self.current_checker_command)
442
# Start a new checker if needed
319
# than 'timeout' for the client to be declared invalid, which
320
# is as it should be.
443
321
if self.checker is None:
444
322
try:
445
# In case checker_command has exactly one % operator
446
command = self.checker_command % self.host
323
# In case check_command has exactly one % operator
324
command = self.check_command % self.host
447
325
except TypeError:
448
326
# Escape attributes for the shell
449
escaped_attrs = dict((key,
450
re.escape(unicode(str(val),
451
errors=
452
u'replace')))
327
escaped_attrs = dict((key, re.escape(str(val)))
453
328
for key, val in
454
329
vars(self).iteritems())
455
330
try:
456
command = self.checker_command % escaped_attrs
331
command = self.check_command % escaped_attrs
457
332
except TypeError, error:
458
333
logger.error(u'Could not format string "%s":'
459
u' %s', self.checker_command, error)
334
u' %s', self.check_command, error)
460
335
return True # Try again later
461
self.current_checker_command = command
462
336
try:
463
337
logger.info(u"Starting checker %r for %s",
464
338
command, self.name)
465
# We don't need to redirect stdout and stderr, since
466
# in normal mode, that is already done by daemon(),
467
# and in debug mode we don't want to. (Stdin is
468
# always replaced by /dev/null.)
469
339
self.checker = subprocess.Popen(command,
470
340
close_fds=True,
471
shell=True, cwd=u"/")
472
self.checker_callback_tag = (gobject.child_watch_add
473
(self.checker.pid,
474
self.checker_callback,
475
data=command))
476
# The checker may have completed before the gobject
477
# watch was added. Check for this.
478
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
479
if pid:
480
gobject.source_remove(self.checker_callback_tag)
481
self.checker_callback(pid, status, command)
482
except OSError, error:
341
shell=True, cwd="/")
342
self.checker_callback_tag = gobject.child_watch_add\
343
(self.checker.pid,
344
self.checker_callback)
345
except subprocess.OSError, error:
483
346
logger.error(u"Failed to start subprocess: %s",
484
347
error)
485
348
# Re-run this periodically if run by gobject.timeout_add
486
349
return True
487
488
350
def stop_checker(self):
489
351
"""Force the checker process, if any, to stop."""
490
352
if self.checker_callback_tag:
491
353
gobject.source_remove(self.checker_callback_tag)
492
354
self.checker_callback_tag = None
493
if getattr(self, u"checker", None) is None:
355
if getattr(self, "checker", None) is None:
494
356
return
495
357
logger.debug(u"Stopping checker for %(name)s", vars(self))
496
358
try:
497
359
os.kill(self.checker.pid, signal.SIGTERM)
498
#time.sleep(0.5)
360
#os.sleep(0.5)
499
361
#if self.checker.poll() is None:
500
362
# os.kill(self.checker.pid, signal.SIGKILL)
501
363
except OSError, error:
502
364
if error.errno != errno.ESRCH: # No such process
503
365
raise
504
366
self.checker = None
505
506
def dbus_service_property(dbus_interface, signature=u"v",
507
access=u"readwrite", byte_arrays=False):
508
"""Decorators for marking methods of a DBusObjectWithProperties to
509
become properties on the D-Bus.
510
511
The decorated method will be called with no arguments by "Get"
512
and with one argument by "Set".
513
514
The parameters, where they are supported, are the same as
515
dbus.service.method, except there is only "signature", since the
516
type from Get() and the type sent to Set() is the same.
517
"""
518
# Encoding deeply encoded byte arrays is not supported yet by the
519
# "Set" method, so we fail early here:
520
if byte_arrays and signature != u"ay":
521
raise ValueError(u"Byte arrays not supported for non-'ay'"
522
u" signature %r" % signature)
523
def decorator(func):
524
func._dbus_is_property = True
525
func._dbus_interface = dbus_interface
526
func._dbus_signature = signature
527
func._dbus_access = access
528
func._dbus_name = func.__name__
529
if func._dbus_name.endswith(u"_dbus_property"):
530
func._dbus_name = func._dbus_name[:-14]
531
func._dbus_get_args_options = {u'byte_arrays': byte_arrays }
532
return func
533
return decorator
534
535
536
class DBusPropertyException(dbus.exceptions.DBusException):
537
"""A base class for D-Bus property-related exceptions
538
"""
539
def __unicode__(self):
540
return unicode(str(self))
541
542
543
class DBusPropertyAccessException(DBusPropertyException):
544
"""A property's access permissions disallows an operation.
545
"""
546
pass
547
548
549
class DBusPropertyNotFound(DBusPropertyException):
550
"""An attempt was made to access a non-existing property.
551
"""
552
pass
553
554
555
class DBusObjectWithProperties(dbus.service.Object):
556
"""A D-Bus object with properties.
557
558
Classes inheriting from this can use the dbus_service_property
559
decorator to expose methods as D-Bus properties. It exposes the
560
standard Get(), Set(), and GetAll() methods on the D-Bus.
561
"""
562
563
@staticmethod
564
def _is_dbus_property(obj):
565
return getattr(obj, u"_dbus_is_property", False)
566
567
def _get_all_dbus_properties(self):
568
"""Returns a generator of (name, attribute) pairs
569
"""
570
return ((prop._dbus_name, prop)
571
for name, prop in
572
inspect.getmembers(self, self._is_dbus_property))
573
574
def _get_dbus_property(self, interface_name, property_name):
575
"""Returns a bound method if one exists which is a D-Bus
576
property with the specified name and interface.
577
"""
578
for name in (property_name,
579
property_name + u"_dbus_property"):
580
prop = getattr(self, name, None)
581
if (prop is None
582
or not self._is_dbus_property(prop)
583
or prop._dbus_name != property_name
584
or (interface_name and prop._dbus_interface
585
and interface_name != prop._dbus_interface)):
586
continue
587
return prop
588
# No such property
589
raise DBusPropertyNotFound(self.dbus_object_path + u":"
590
+ interface_name + u"."
591
+ property_name)
592
593
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ss",
594
out_signature=u"v")
595
def Get(self, interface_name, property_name):
596
"""Standard D-Bus property Get() method, see D-Bus standard.
597
"""
598
prop = self._get_dbus_property(interface_name, property_name)
599
if prop._dbus_access == u"write":
600
raise DBusPropertyAccessException(property_name)
601
value = prop()
602
if not hasattr(value, u"variant_level"):
603
return value
604
return type(value)(value, variant_level=value.variant_level+1)
605
606
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ssv")
607
def Set(self, interface_name, property_name, value):
608
"""Standard D-Bus property Set() method, see D-Bus standard.
609
"""
610
prop = self._get_dbus_property(interface_name, property_name)
611
if prop._dbus_access == u"read":
612
raise DBusPropertyAccessException(property_name)
613
if prop._dbus_get_args_options[u"byte_arrays"]:
614
# The byte_arrays option is not supported yet on
615
# signatures other than "ay".
616
if prop._dbus_signature != u"ay":
617
raise ValueError
618
value = dbus.ByteArray(''.join(unichr(byte)
619
for byte in value))
620
prop(value)
621
622
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"s",
623
out_signature=u"a{sv}")
624
def GetAll(self, interface_name):
625
"""Standard D-Bus property GetAll() method, see D-Bus
626
standard.
627
628
Note: Will not include properties with access="write".
629
"""
630
all = {}
631
for name, prop in self._get_all_dbus_properties():
632
if (interface_name
633
and interface_name != prop._dbus_interface):
634
# Interface non-empty but did not match
635
continue
636
# Ignore write-only properties
637
if prop._dbus_access == u"write":
638
continue
639
value = prop()
640
if not hasattr(value, u"variant_level"):
641
all[name] = value
642
continue
643
all[name] = type(value)(value, variant_level=
644
value.variant_level+1)
645
return dbus.Dictionary(all, signature=u"sv")
646
647
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
648
out_signature=u"s",
649
path_keyword='object_path',
650
connection_keyword='connection')
651
def Introspect(self, object_path, connection):
652
"""Standard D-Bus method, overloaded to insert property tags.
653
"""
654
xmlstring = dbus.service.Object.Introspect(self, object_path,
655
connection)
656
try:
657
document = xml.dom.minidom.parseString(xmlstring)
658
def make_tag(document, name, prop):
659
e = document.createElement(u"property")
660
e.setAttribute(u"name", name)
661
e.setAttribute(u"type", prop._dbus_signature)
662
e.setAttribute(u"access", prop._dbus_access)
663
return e
664
for if_tag in document.getElementsByTagName(u"interface"):
665
for tag in (make_tag(document, name, prop)
666
for name, prop
667
in self._get_all_dbus_properties()
668
if prop._dbus_interface
669
== if_tag.getAttribute(u"name")):
670
if_tag.appendChild(tag)
671
# Add the names to the return values for the
672
# "org.freedesktop.DBus.Properties" methods
673
if (if_tag.getAttribute(u"name")
674
== u"org.freedesktop.DBus.Properties"):
675
for cn in if_tag.getElementsByTagName(u"method"):
676
if cn.getAttribute(u"name") == u"Get":
677
for arg in cn.getElementsByTagName(u"arg"):
678
if (arg.getAttribute(u"direction")
679
== u"out"):
680
arg.setAttribute(u"name", u"value")
681
elif cn.getAttribute(u"name") == u"GetAll":
682
for arg in cn.getElementsByTagName(u"arg"):
683
if (arg.getAttribute(u"direction")
684
== u"out"):
685
arg.setAttribute(u"name", u"props")
686
xmlstring = document.toxml(u"utf-8")
687
document.unlink()
688
except (AttributeError, xml.dom.DOMException,
689
xml.parsers.expat.ExpatError), error:
690
logger.error(u"Failed to override Introspection method",
691
error)
692
return xmlstring
693
694
695
class ClientDBus(Client, DBusObjectWithProperties):
696
"""A Client class using D-Bus
697
698
Attributes:
699
dbus_object_path: dbus.ObjectPath
700
bus: dbus.SystemBus()
701
"""
702
# dbus.service.Object doesn't use super(), so we can't either.
703
704
def __init__(self, bus = None, *args, **kwargs):
705
self.bus = bus
706
Client.__init__(self, *args, **kwargs)
707
# Only now, when this client is initialized, can it show up on
708
# the D-Bus
709
self.dbus_object_path = (dbus.ObjectPath
710
(u"/clients/"
711
+ self.name.replace(u".", u"_")))
712
DBusObjectWithProperties.__init__(self, self.bus,
713
self.dbus_object_path)
714
715
@staticmethod
716
def _datetime_to_dbus(dt, variant_level=0):
717
"""Convert a UTC datetime.datetime() to a D-Bus type."""
718
return dbus.String(dt.isoformat(),
719
variant_level=variant_level)
720
721
def enable(self):
722
oldstate = getattr(self, u"enabled", False)
723
r = Client.enable(self)
724
if oldstate != self.enabled:
725
# Emit D-Bus signals
726
self.PropertyChanged(dbus.String(u"enabled"),
727
dbus.Boolean(True, variant_level=1))
728
self.PropertyChanged(
729
dbus.String(u"last_enabled"),
730
self._datetime_to_dbus(self.last_enabled,
731
variant_level=1))
732
return r
733
734
def disable(self, quiet = False):
735
oldstate = getattr(self, u"enabled", False)
736
r = Client.disable(self, quiet=quiet)
737
if not quiet and oldstate != self.enabled:
738
# Emit D-Bus signal
739
self.PropertyChanged(dbus.String(u"enabled"),
740
dbus.Boolean(False, variant_level=1))
741
return r
742
743
def __del__(self, *args, **kwargs):
744
try:
745
self.remove_from_connection()
746
except LookupError:
747
pass
748
if hasattr(DBusObjectWithProperties, u"__del__"):
749
DBusObjectWithProperties.__del__(self, *args, **kwargs)
750
Client.__del__(self, *args, **kwargs)
751
752
def checker_callback(self, pid, condition, command,
753
*args, **kwargs):
754
self.checker_callback_tag = None
755
self.checker = None
756
# Emit D-Bus signal
757
self.PropertyChanged(dbus.String(u"checker_running"),
758
dbus.Boolean(False, variant_level=1))
759
if os.WIFEXITED(condition):
760
exitstatus = os.WEXITSTATUS(condition)
761
# Emit D-Bus signal
762
self.CheckerCompleted(dbus.Int16(exitstatus),
763
dbus.Int64(condition),
764
dbus.String(command))
765
else:
766
# Emit D-Bus signal
767
self.CheckerCompleted(dbus.Int16(-1),
768
dbus.Int64(condition),
769
dbus.String(command))
770
771
return Client.checker_callback(self, pid, condition, command,
772
*args, **kwargs)
773
774
def checked_ok(self, *args, **kwargs):
775
r = Client.checked_ok(self, *args, **kwargs)
776
# Emit D-Bus signal
777
self.PropertyChanged(
778
dbus.String(u"last_checked_ok"),
779
(self._datetime_to_dbus(self.last_checked_ok,
780
variant_level=1)))
781
return r
782
783
def start_checker(self, *args, **kwargs):
784
old_checker = self.checker
785
if self.checker is not None:
786
old_checker_pid = self.checker.pid
787
else:
788
old_checker_pid = None
789
r = Client.start_checker(self, *args, **kwargs)
790
# Only if new checker process was started
791
if (self.checker is not None
792
and old_checker_pid != self.checker.pid):
793
# Emit D-Bus signal
794
self.CheckerStarted(self.current_checker_command)
795
self.PropertyChanged(
796
dbus.String(u"checker_running"),
797
dbus.Boolean(True, variant_level=1))
798
return r
799
800
def stop_checker(self, *args, **kwargs):
801
old_checker = getattr(self, u"checker", None)
802
r = Client.stop_checker(self, *args, **kwargs)
803
if (old_checker is not None
804
and getattr(self, u"checker", None) is None):
805
self.PropertyChanged(dbus.String(u"checker_running"),
806
dbus.Boolean(False, variant_level=1))
807
return r
808
809
def _reset_approved(self):
810
self._approved = None
811
return False
812
813
def approve(self, value=True):
814
self._approved = value
815
gobject.timeout_add(self._timedelta_to_milliseconds(self.approved_duration, self._reset_approved))
816
817
def approved_pending(self):
818
return self.approvals_pending > 0
819
820
821
## D-Bus methods, signals & properties
822
_interface = u"se.bsnet.fukt.Mandos.Client"
823
824
## Signals
825
826
# CheckerCompleted - signal
827
@dbus.service.signal(_interface, signature=u"nxs")
828
def CheckerCompleted(self, exitcode, waitstatus, command):
829
"D-Bus signal"
830
pass
831
832
# CheckerStarted - signal
833
@dbus.service.signal(_interface, signature=u"s")
834
def CheckerStarted(self, command):
835
"D-Bus signal"
836
pass
837
838
# PropertyChanged - signal
839
@dbus.service.signal(_interface, signature=u"sv")
840
def PropertyChanged(self, property, value):
841
"D-Bus signal"
842
pass
843
844
# GotSecret - signal
845
@dbus.service.signal(_interface)
846
def GotSecret(self):
847
"D-Bus signal"
848
pass
849
850
# Rejected - signal
851
@dbus.service.signal(_interface, signature=u"s")
852
def Rejected(self, reason):
853
"D-Bus signal"
854
pass
855
856
# NeedApproval - signal
857
@dbus.service.signal(_interface, signature=u"db")
858
def NeedApproval(self, timeout, default):
859
"D-Bus signal"
860
pass
861
862
## Methods
863
864
# Approve - method
865
@dbus.service.method(_interface, in_signature=u"b")
866
def Approve(self, value):
867
self.approve(value)
868
869
# CheckedOK - method
870
@dbus.service.method(_interface)
871
def CheckedOK(self):
872
return self.checked_ok()
873
874
# Enable - method
875
@dbus.service.method(_interface)
876
def Enable(self):
877
"D-Bus method"
878
self.enable()
879
880
# StartChecker - method
881
@dbus.service.method(_interface)
882
def StartChecker(self):
883
"D-Bus method"
884
self.start_checker()
885
886
# Disable - method
887
@dbus.service.method(_interface)
888
def Disable(self):
889
"D-Bus method"
890
self.disable()
891
892
# StopChecker - method
893
@dbus.service.method(_interface)
894
def StopChecker(self):
895
self.stop_checker()
896
897
## Properties
898
899
# approved_pending - property
900
@dbus_service_property(_interface, signature=u"b", access=u"read")
901
def approved_pending_dbus_property(self):
902
return dbus.Boolean(self.approved_pending())
903
904
# approved_by_default - property
905
@dbus_service_property(_interface, signature=u"b",
906
access=u"readwrite")
907
def approved_by_default_dbus_property(self):
908
return dbus.Boolean(self.approved_by_default)
909
910
# approved_delay - property
911
@dbus_service_property(_interface, signature=u"t",
912
access=u"readwrite")
913
def approved_delay_dbus_property(self):
914
return dbus.UInt64(self.approved_delay_milliseconds())
915
916
# approved_duration - property
917
@dbus_service_property(_interface, signature=u"t",
918
access=u"readwrite")
919
def approved_duration_dbus_property(self):
920
return dbus.UInt64(self._timedelta_to_milliseconds(
921
self.approved_duration))
922
923
# name - property
924
@dbus_service_property(_interface, signature=u"s", access=u"read")
925
def name_dbus_property(self):
926
return dbus.String(self.name)
927
928
# fingerprint - property
929
@dbus_service_property(_interface, signature=u"s", access=u"read")
930
def fingerprint_dbus_property(self):
931
return dbus.String(self.fingerprint)
932
933
# host - property
934
@dbus_service_property(_interface, signature=u"s",
935
access=u"readwrite")
936
def host_dbus_property(self, value=None):
937
if value is None: # get
938
return dbus.String(self.host)
939
self.host = value
940
# Emit D-Bus signal
941
self.PropertyChanged(dbus.String(u"host"),
942
dbus.String(value, variant_level=1))
943
944
# created - property
945
@dbus_service_property(_interface, signature=u"s", access=u"read")
946
def created_dbus_property(self):
947
return dbus.String(self._datetime_to_dbus(self.created))
948
949
# last_enabled - property
950
@dbus_service_property(_interface, signature=u"s", access=u"read")
951
def last_enabled_dbus_property(self):
952
if self.last_enabled is None:
953
return dbus.String(u"")
954
return dbus.String(self._datetime_to_dbus(self.last_enabled))
955
956
# enabled - property
957
@dbus_service_property(_interface, signature=u"b",
958
access=u"readwrite")
959
def enabled_dbus_property(self, value=None):
960
if value is None: # get
961
return dbus.Boolean(self.enabled)
962
if value:
963
self.enable()
964
else:
965
self.disable()
966
967
# last_checked_ok - property
968
@dbus_service_property(_interface, signature=u"s",
969
access=u"readwrite")
970
def last_checked_ok_dbus_property(self, value=None):
971
if value is not None:
972
self.checked_ok()
973
return
367
def still_valid(self):
368
"""Has the timeout not yet passed for this client?"""
369
now = datetime.datetime.now()
974
370
if self.last_checked_ok is None:
975
return dbus.String(u"")
976
return dbus.String(self._datetime_to_dbus(self
977
.last_checked_ok))
978
979
# timeout - property
980
@dbus_service_property(_interface, signature=u"t",
981
access=u"readwrite")
982
def timeout_dbus_property(self, value=None):
983
if value is None: # get
984
return dbus.UInt64(self.timeout_milliseconds())
985
self.timeout = datetime.timedelta(0, 0, 0, value)
986
# Emit D-Bus signal
987
self.PropertyChanged(dbus.String(u"timeout"),
988
dbus.UInt64(value, variant_level=1))
989
if getattr(self, u"disable_initiator_tag", None) is None:
990
return
991
# Reschedule timeout
992
gobject.source_remove(self.disable_initiator_tag)
993
self.disable_initiator_tag = None
994
time_to_die = (self.
995
_timedelta_to_milliseconds((self
996
.last_checked_ok
997
+ self.timeout)
998
- datetime.datetime
999
.utcnow()))
1000
if time_to_die <= 0:
1001
# The timeout has passed
1002
self.disable()
1003
else:
1004
self.disable_initiator_tag = (gobject.timeout_add
1005
(time_to_die, self.disable))
1006
1007
# interval - property
1008
@dbus_service_property(_interface, signature=u"t",
1009
access=u"readwrite")
1010
def interval_dbus_property(self, value=None):
1011
if value is None: # get
1012
return dbus.UInt64(self.interval_milliseconds())
1013
self.interval = datetime.timedelta(0, 0, 0, value)
1014
# Emit D-Bus signal
1015
self.PropertyChanged(dbus.String(u"interval"),
1016
dbus.UInt64(value, variant_level=1))
1017
if getattr(self, u"checker_initiator_tag", None) is None:
1018
return
1019
# Reschedule checker run
1020
gobject.source_remove(self.checker_initiator_tag)
1021
self.checker_initiator_tag = (gobject.timeout_add
1022
(value, self.start_checker))
1023
self.start_checker() # Start one now, too
1024
1025
# checker - property
1026
@dbus_service_property(_interface, signature=u"s",
1027
access=u"readwrite")
1028
def checker_dbus_property(self, value=None):
1029
if value is None: # get
1030
return dbus.String(self.checker_command)
1031
self.checker_command = value
1032
# Emit D-Bus signal
1033
self.PropertyChanged(dbus.String(u"checker"),
1034
dbus.String(self.checker_command,
1035
variant_level=1))
1036
1037
# checker_running - property
1038
@dbus_service_property(_interface, signature=u"b",
1039
access=u"readwrite")
1040
def checker_running_dbus_property(self, value=None):
1041
if value is None: # get
1042
return dbus.Boolean(self.checker is not None)
1043
if value:
1044
self.start_checker()
1045
else:
1046
self.stop_checker()
1047
1048
# object_path - property
1049
@dbus_service_property(_interface, signature=u"o", access=u"read")
1050
def object_path_dbus_property(self):
1051
return self.dbus_object_path # is already a dbus.ObjectPath
1052
1053
# secret = property
1054
@dbus_service_property(_interface, signature=u"ay",
1055
access=u"write", byte_arrays=True)
1056
def secret_dbus_property(self, value):
1057
self.secret = str(value)
1058
1059
del _interface
1060
1061
1062
class ProxyClient(object):
1063
def __init__(self, child_pipe, fpr, address):
1064
self._pipe = child_pipe
1065
self._pipe.send(('init', fpr, address))
1066
if not self._pipe.recv():
1067
raise KeyError()
1068
1069
def __getattribute__(self, name):
1070
if(name == '_pipe'):
1071
return super(ProxyClient, self).__getattribute__(name)
1072
self._pipe.send(('getattr', name))
1073
data = self._pipe.recv()
1074
if data[0] == 'data':
1075
return data[1]
1076
if data[0] == 'function':
1077
def func(*args, **kwargs):
1078
self._pipe.send(('funcall', name, args, kwargs))
1079
return self._pipe.recv()[1]
1080
return func
1081
1082
def __setattr__(self, name, value):
1083
if(name == '_pipe'):
1084
return super(ProxyClient, self).__setattr__(name, value)
1085
self._pipe.send(('setattr', name, value))
1086
1087
1088
class ClientHandler(socketserver.BaseRequestHandler, object):
1089
"""A class to handle client connections.
1090
1091
Instantiated once for each connection to handle it.
371
return now < (self.created + self.timeout)
372
else:
373
return now < (self.last_checked_ok + self.timeout)
374
375
376
def peer_certificate(session):
377
"Return the peer's OpenPGP certificate as a bytestring"
378
# If not an OpenPGP certificate...
379
if gnutls.library.functions.gnutls_certificate_type_get\
380
(session._c_object) \
381
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP:
382
# ...do the normal thing
383
return session.peer_certificate
384
list_size = ctypes.c_uint()
385
cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
386
(session._c_object, ctypes.byref(list_size))
387
if list_size.value == 0:
388
return None
389
cert = cert_list[0]
390
return ctypes.string_at(cert.data, cert.size)
391
392
393
def fingerprint(openpgp):
394
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
395
# New GnuTLS "datum" with the OpenPGP public key
396
datum = gnutls.library.types.gnutls_datum_t\
397
(ctypes.cast(ctypes.c_char_p(openpgp),
398
ctypes.POINTER(ctypes.c_ubyte)),
399
ctypes.c_uint(len(openpgp)))
400
# New empty GnuTLS certificate
401
crt = gnutls.library.types.gnutls_openpgp_crt_t()
402
gnutls.library.functions.gnutls_openpgp_crt_init\
403
(ctypes.byref(crt))
404
# Import the OpenPGP public key into the certificate
405
gnutls.library.functions.gnutls_openpgp_crt_import\
406
(crt, ctypes.byref(datum),
407
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
408
# New buffer for the fingerprint
409
buffer = ctypes.create_string_buffer(20)
410
buffer_length = ctypes.c_size_t()
411
# Get the fingerprint from the certificate into the buffer
412
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
413
(crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
414
# Deinit the certificate
415
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
416
# Convert the buffer to a Python bytestring
417
fpr = ctypes.string_at(buffer, buffer_length.value)
418
# Convert the bytestring to hexadecimal notation
419
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
420
return hex_fpr
421
422
423
class tcp_handler(SocketServer.BaseRequestHandler, object):
424
"""A TCP request handler class.
425
Instantiated by IPv6_TCPServer for each request to handle it.
1092
426
Note: This will run in its own forked process."""
1093
427
1094
428
def handle(self):
1095
with contextlib.closing(self.server.child_pipe) as child_pipe:
1096
logger.info(u"TCP connection from: %s",
1097
unicode(self.client_address))
1098
logger.debug(u"Pipe FD: %d",
1099
self.server.child_pipe.fileno())
1100
1101
session = (gnutls.connection
1102
.ClientSession(self.request,
1103
gnutls.connection
1104
.X509Credentials()))
1105
1106
# Note: gnutls.connection.X509Credentials is really a
1107
# generic GnuTLS certificate credentials object so long as
1108
# no X.509 keys are added to it. Therefore, we can use it
1109
# here despite using OpenPGP certificates.
1110
1111
#priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
1112
# u"+AES-256-CBC", u"+SHA1",
1113
# u"+COMP-NULL", u"+CTYPE-OPENPGP",
1114
# u"+DHE-DSS"))
1115
# Use a fallback default, since this MUST be set.
1116
priority = self.server.gnutls_priority
1117
if priority is None:
1118
priority = u"NORMAL"
1119
(gnutls.library.functions
1120
.gnutls_priority_set_direct(session._c_object,
1121
priority, None))
1122
1123
# Start communication using the Mandos protocol
1124
# Get protocol number
1125
line = self.request.makefile().readline()
1126
logger.debug(u"Protocol version: %r", line)
1127
try:
1128
if int(line.strip().split()[0]) > 1:
1129
raise RuntimeError
1130
except (ValueError, IndexError, RuntimeError), error:
1131
logger.error(u"Unknown protocol version: %s", error)
1132
return
1133
1134
# Start GnuTLS connection
1135
try:
1136
session.handshake()
1137
except gnutls.errors.GNUTLSError, error:
1138
logger.warning(u"Handshake failed: %s", error)
1139
# Do not run session.bye() here: the session is not
1140
# established. Just abandon the request.
1141
return
1142
logger.debug(u"Handshake succeeded")
1143
1144
approval_required = False
1145
try:
1146
try:
1147
fpr = self.fingerprint(self.peer_certificate
1148
(session))
1149
except (TypeError, gnutls.errors.GNUTLSError), error:
1150
logger.warning(u"Bad certificate: %s", error)
1151
return
1152
logger.debug(u"Fingerprint: %s", fpr)
1153
1154
try:
1155
client = ProxyClient(child_pipe, fpr,
1156
self.client_address)
1157
except KeyError:
1158
return
1159
1160
if client.approved_delay:
1161
delay = client.approved_delay
1162
client.approvals_pending += 1
1163
approval_required = True
1164
1165
while True:
1166
if not client.enabled:
1167
logger.warning(u"Client %s is disabled",
1168
client.name)
1169
if self.server.use_dbus:
1170
# Emit D-Bus signal
1171
client.Rejected("Disabled")
1172
return
1173
1174
if client._approved or not client.approved_delay:
1175
#We are approved or approval is disabled
1176
break
1177
elif client._approved is None:
1178
logger.info(u"Client %s need approval",
1179
client.name)
1180
if self.server.use_dbus:
1181
# Emit D-Bus signal
1182
client.NeedApproval(
1183
client.approved_delay_milliseconds(),
1184
client.approved_by_default)
1185
else:
1186
logger.warning(u"Client %s was not approved",
1187
client.name)
1188
if self.server.use_dbus:
1189
# Emit D-Bus signal
1190
client.Rejected("Disapproved")
1191
return
1192
1193
#wait until timeout or approved
1194
#x = float(client._timedelta_to_milliseconds(delay))
1195
time = datetime.datetime.now()
1196
client.changedstate.acquire()
1197
client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))
1198
client.changedstate.release()
1199
time2 = datetime.datetime.now()
1200
if (time2 - time) >= delay:
1201
if not client.approved_by_default:
1202
logger.warning("Client %s timed out while"
1203
" waiting for approval",
1204
client.name)
1205
if self.server.use_dbus:
1206
# Emit D-Bus signal
1207
client.Rejected("Time out")
1208
return
1209
else:
1210
break
1211
else:
1212
delay -= time2 - time
1213
1214
sent_size = 0
1215
while sent_size < len(client.secret):
1216
# XXX handle session exception
1217
sent = session.send(client.secret[sent_size:])
1218
logger.debug(u"Sent: %d, remaining: %d",
1219
sent, len(client.secret)
1220
- (sent_size + sent))
1221
sent_size += sent
1222
1223
logger.info(u"Sending secret to %s", client.name)
1224
# bump the timeout as if seen
1225
client.checked_ok()
1226
if self.server.use_dbus:
1227
# Emit D-Bus signal
1228
client.GotSecret()
1229
1230
finally:
1231
if approval_required:
1232
client.approvals_pending -= 1
1233
session.bye()
1234
1235
@staticmethod
1236
def peer_certificate(session):
1237
"Return the peer's OpenPGP certificate as a bytestring"
1238
# If not an OpenPGP certificate...
1239
if (gnutls.library.functions
1240
.gnutls_certificate_type_get(session._c_object)
1241
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1242
# ...do the normal thing
1243
return session.peer_certificate
1244
list_size = ctypes.c_uint(1)
1245
cert_list = (gnutls.library.functions
1246
.gnutls_certificate_get_peers
1247
(session._c_object, ctypes.byref(list_size)))
1248
if not bool(cert_list) and list_size.value != 0:
1249
raise gnutls.errors.GNUTLSError(u"error getting peer"
1250
u" certificate")
1251
if list_size.value == 0:
1252
return None
1253
cert = cert_list[0]
1254
return ctypes.string_at(cert.data, cert.size)
1255
1256
@staticmethod
1257
def fingerprint(openpgp):
1258
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1259
# New GnuTLS "datum" with the OpenPGP public key
1260
datum = (gnutls.library.types
1261
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1262
ctypes.POINTER
1263
(ctypes.c_ubyte)),
1264
ctypes.c_uint(len(openpgp))))
1265
# New empty GnuTLS certificate
1266
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1267
(gnutls.library.functions
1268
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1269
# Import the OpenPGP public key into the certificate
1270
(gnutls.library.functions
1271
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1272
gnutls.library.constants
1273
.GNUTLS_OPENPGP_FMT_RAW))
1274
# Verify the self signature in the key
1275
crtverify = ctypes.c_uint()
1276
(gnutls.library.functions
1277
.gnutls_openpgp_crt_verify_self(crt, 0,
1278
ctypes.byref(crtverify)))
1279
if crtverify.value != 0:
1280
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1281
raise (gnutls.errors.CertificateSecurityError
1282
(u"Verify failed"))
1283
# New buffer for the fingerprint
1284
buf = ctypes.create_string_buffer(20)
1285
buf_len = ctypes.c_size_t()
1286
# Get the fingerprint from the certificate into the buffer
1287
(gnutls.library.functions
1288
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1289
ctypes.byref(buf_len)))
1290
# Deinit the certificate
1291
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1292
# Convert the buffer to a Python bytestring
1293
fpr = ctypes.string_at(buf, buf_len.value)
1294
# Convert the bytestring to hexadecimal notation
1295
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
1296
return hex_fpr
1297
1298
1299
class MultiprocessingMixIn(object):
1300
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1301
def sub_process_main(self, request, address):
1302
try:
1303
self.finish_request(request, address)
1304
except:
1305
self.handle_error(request, address)
1306
self.close_request(request)
1307
1308
def process_request(self, request, address):
1309
"""Start a new process to process the request."""
1310
multiprocessing.Process(target = self.sub_process_main,
1311
args = (request, address)).start()
1312
1313
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1314
""" adds a pipe to the MixIn """
1315
def process_request(self, request, client_address):
1316
"""Overrides and wraps the original process_request().
1317
1318
This function creates a new pipe in self.pipe
1319
"""
1320
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1321
1322
super(MultiprocessingMixInWithPipe,
1323
self).process_request(request, client_address)
1324
self.add_pipe(parent_pipe)
1325
def add_pipe(self, parent_pipe):
1326
"""Dummy function; override as necessary"""
1327
pass
1328
1329
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1330
socketserver.TCPServer, object):
1331
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1332
429
logger.info(u"TCP connection from: %s",
430
unicode(self.client_address))
431
session = gnutls.connection.ClientSession\
432
(self.request, gnutls.connection.X509Credentials())
433
434
line = self.request.makefile().readline()
435
logger.debug(u"Protocol version: %r", line)
436
try:
437
if int(line.strip().split()[0]) > 1:
438
raise RuntimeError
439
except (ValueError, IndexError, RuntimeError), error:
440
logger.error(u"Unknown protocol version: %s", error)
441
return
442
443
# Note: gnutls.connection.X509Credentials is really a generic
444
# GnuTLS certificate credentials object so long as no X.509
445
# keys are added to it. Therefore, we can use it here despite
446
# using OpenPGP certificates.
447
448
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
449
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
450
# "+DHE-DSS"))
451
priority = "NORMAL" # Fallback default, since this
452
# MUST be set.
453
if self.server.settings["priority"]:
454
priority = self.server.settings["priority"]
455
gnutls.library.functions.gnutls_priority_set_direct\
456
(session._c_object, priority, None);
457
458
try:
459
session.handshake()
460
except gnutls.errors.GNUTLSError, error:
461
logger.warning(u"Handshake failed: %s", error)
462
# Do not run session.bye() here: the session is not
463
# established. Just abandon the request.
464
return
465
try:
466
fpr = fingerprint(peer_certificate(session))
467
except (TypeError, gnutls.errors.GNUTLSError), error:
468
logger.warning(u"Bad certificate: %s", error)
469
session.bye()
470
return
471
logger.debug(u"Fingerprint: %s", fpr)
472
client = None
473
for c in self.server.clients:
474
if c.fingerprint == fpr:
475
client = c
476
break
477
if not client:
478
logger.warning(u"Client not found for fingerprint: %s",
479
fpr)
480
session.bye()
481
return
482
# Have to check if client.still_valid(), since it is possible
483
# that the client timed out while establishing the GnuTLS
484
# session.
485
if not client.still_valid():
486
logger.warning(u"Client %(name)s is invalid",
487
vars(client))
488
session.bye()
489
return
490
sent_size = 0
491
while sent_size < len(client.secret):
492
sent = session.send(client.secret[sent_size:])
493
logger.debug(u"Sent: %d, remaining: %d",
494
sent, len(client.secret)
495
- (sent_size + sent))
496
sent_size += sent
497
session.bye()
498
499
500
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
501
"""IPv6 TCP server. Accepts 'None' as address and/or port.
1333
502
Attributes:
1334
enabled: Boolean; whether this server is activated yet
1335
interface: None or a network interface name (string)
1336
use_ipv6: Boolean; to use IPv6 or not
503
settings: Server settings
504
clients: Set() of Client objects
1337
505
"""
1338
def __init__(self, server_address, RequestHandlerClass,
1339
interface=None, use_ipv6=True):
1340
self.interface = interface
1341
if use_ipv6:
1342
self.address_family = socket.AF_INET6
1343
socketserver.TCPServer.__init__(self, server_address,
1344
RequestHandlerClass)
506
address_family = socket.AF_INET6
507
def __init__(self, *args, **kwargs):
508
if "settings" in kwargs:
509
self.settings = kwargs["settings"]
510
del kwargs["settings"]
511
if "clients" in kwargs:
512
self.clients = kwargs["clients"]
513
del kwargs["clients"]
514
return super(type(self), self).__init__(*args, **kwargs)
1345
515
def server_bind(self):
1346
516
"""This overrides the normal server_bind() function
1347
517
to bind to an interface if one was specified, and also NOT to
1348
518
bind to an address or port if they were not specified."""
1349
if self.interface is not None:
1350
if SO_BINDTODEVICE is None:
1351
logger.error(u"SO_BINDTODEVICE does not exist;"
1352
u" cannot bind to interface %s",
1353
self.interface)
1354
else:
1355
try:
1356
self.socket.setsockopt(socket.SOL_SOCKET,
1357
SO_BINDTODEVICE,
1358
str(self.interface
1359
+ u'\0'))
1360
except socket.error, error:
1361
if error[0] == errno.EPERM:
1362
logger.error(u"No permission to"
1363
u" bind to interface %s",
1364
self.interface)
1365
elif error[0] == errno.ENOPROTOOPT:
1366
logger.error(u"SO_BINDTODEVICE not available;"
1367
u" cannot bind to interface %s",
1368
self.interface)
1369
else:
1370
raise
519
if self.settings["interface"]:
520
# 25 is from /usr/include/asm-i486/socket.h
521
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
522
try:
523
self.socket.setsockopt(socket.SOL_SOCKET,
524
SO_BINDTODEVICE,
525
self.settings["interface"])
526
except socket.error, error:
527
if error[0] == errno.EPERM:
528
logger.error(u"No permission to"
529
u" bind to interface %s",
530
self.settings["interface"])
531
else:
532
raise error
1371
533
# Only bind(2) the socket if we really need to.
1372
534
if self.server_address[0] or self.server_address[1]:
1373
535
if not self.server_address[0]:
1374
if self.address_family == socket.AF_INET6:
1375
any_address = u"::" # in6addr_any
1376
else:
1377
any_address = socket.INADDR_ANY
1378
self.server_address = (any_address,
536
in6addr_any = "::"
537
self.server_address = (in6addr_any,
1379
538
self.server_address[1])
1380
539
elif not self.server_address[1]:
1381
540
self.server_address = (self.server_address[0],
1382
541
0)
1383
# if self.interface:
542
# if self.settings["interface"]:
1384
543
# self.server_address = (self.server_address[0],
1385
544
# 0, # port
1386
545
# 0, # flowinfo
1387
546
# if_nametoindex
1388
# (self.interface))
1389
return socketserver.TCPServer.server_bind(self)
1390
1391
1392
class MandosServer(IPv6_TCPServer):
1393
"""Mandos server.
1394
1395
Attributes:
1396
clients: set of Client objects
1397
gnutls_priority GnuTLS priority string
1398
use_dbus: Boolean; to emit D-Bus signals or not
1399
1400
Assumes a gobject.MainLoop event loop.
1401
"""
1402
def __init__(self, server_address, RequestHandlerClass,
1403
interface=None, use_ipv6=True, clients=None,
1404
gnutls_priority=None, use_dbus=True):
1405
self.enabled = False
1406
self.clients = clients
1407
if self.clients is None:
1408
self.clients = set()
1409
self.use_dbus = use_dbus
1410
self.gnutls_priority = gnutls_priority
1411
IPv6_TCPServer.__init__(self, server_address,
1412
RequestHandlerClass,
1413
interface = interface,
1414
use_ipv6 = use_ipv6)
1415
def server_activate(self):
1416
if self.enabled:
1417
return socketserver.TCPServer.server_activate(self)
1418
def enable(self):
1419
self.enabled = True
1420
def add_pipe(self, parent_pipe):
1421
# Call "handle_ipc" for both data and EOF events
1422
gobject.io_add_watch(parent_pipe.fileno(),
1423
gobject.IO_IN | gobject.IO_HUP,
1424
functools.partial(self.handle_ipc,
1425
parent_pipe = parent_pipe))
1426
1427
def handle_ipc(self, source, condition, parent_pipe=None,
1428
client_object=None):
1429
condition_names = {
1430
gobject.IO_IN: u"IN", # There is data to read.
1431
gobject.IO_OUT: u"OUT", # Data can be written (without
1432
# blocking).
1433
gobject.IO_PRI: u"PRI", # There is urgent data to read.
1434
gobject.IO_ERR: u"ERR", # Error condition.
1435
gobject.IO_HUP: u"HUP" # Hung up (the connection has been
1436
# broken, usually for pipes and
1437
# sockets).
1438
}
1439
conditions_string = ' | '.join(name
1440
for cond, name in
1441
condition_names.iteritems()
1442
if cond & condition)
1443
logger.debug(u"Handling IPC: FD = %d, condition = %s", source,
1444
conditions_string)
1445
1446
# Read a request from the child
1447
request = parent_pipe.recv()
1448
command = request[0]
1449
1450
if command == 'init':
1451
fpr = request[1]
1452
address = request[2]
1453
1454
for c in self.clients:
1455
if c.fingerprint == fpr:
1456
client = c
1457
break
1458
else:
1459
logger.warning(u"Client not found for fingerprint: %s, ad"
1460
u"dress: %s", fpr, address)
1461
if self.use_dbus:
1462
# Emit D-Bus signal
1463
mandos_dbus_service.ClientNotFound(fpr, address)
1464
parent_pipe.send(False)
1465
return False
1466
1467
gobject.io_add_watch(parent_pipe.fileno(),
1468
gobject.IO_IN | gobject.IO_HUP,
1469
functools.partial(self.handle_ipc,
1470
parent_pipe = parent_pipe,
1471
client_object = client))
1472
parent_pipe.send(True)
1473
# remove the old hook in favor of the new above hook on same fileno
1474
return False
1475
if command == 'funcall':
1476
funcname = request[1]
1477
args = request[2]
1478
kwargs = request[3]
1479
1480
parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))
1481
1482
if command == 'getattr':
1483
attrname = request[1]
1484
if callable(client_object.__getattribute__(attrname)):
1485
parent_pipe.send(('function',))
1486
else:
1487
parent_pipe.send(('data', client_object.__getattribute__(attrname)))
1488
1489
if command == 'setattr':
1490
attrname = request[1]
1491
value = request[2]
1492
setattr(client_object, attrname, value)
1493
1494
return True
547
# (self.settings
548
# ["interface"]))
549
return super(type(self), self).server_bind()
1495
550
1496
551
1497
552
def string_to_delta(interval):
1498
553
"""Parse a string and return a datetime.timedelta
1499
1500
>>> string_to_delta(u'7d')
554
555
>>> string_to_delta('7d')
1501
556
datetime.timedelta(7)
1502
>>> string_to_delta(u'60s')
557
>>> string_to_delta('60s')
1503
558
datetime.timedelta(0, 60)
1504
>>> string_to_delta(u'60m')
559
>>> string_to_delta('60m')
1505
560
datetime.timedelta(0, 3600)
1506
>>> string_to_delta(u'24h')
561
>>> string_to_delta('24h')
1507
562
datetime.timedelta(1)
1508
563
>>> string_to_delta(u'1w')
1509
564
datetime.timedelta(7)
1510
>>> string_to_delta(u'5m 30s')
1511
datetime.timedelta(0, 330)
1512
565
"""
1513
timevalue = datetime.timedelta(0)
1514
for s in interval.split():
1515
try:
1516
suffix = unicode(s[-1])
1517
value = int(s[:-1])
1518
if suffix == u"d":
1519
delta = datetime.timedelta(value)
1520
elif suffix == u"s":
1521
delta = datetime.timedelta(0, value)
1522
elif suffix == u"m":
1523
delta = datetime.timedelta(0, 0, 0, 0, value)
1524
elif suffix == u"h":
1525
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
1526
elif suffix == u"w":
1527
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1528
else:
1529
raise ValueError(u"Unknown suffix %r" % suffix)
1530
except (ValueError, IndexError), e:
1531
raise ValueError(e.message)
1532
timevalue += delta
1533
return timevalue
1534
566
try:
567
suffix=unicode(interval[-1])
568
value=int(interval[:-1])
569
if suffix == u"d":
570
delta = datetime.timedelta(value)
571
elif suffix == u"s":
572
delta = datetime.timedelta(0, value)
573
elif suffix == u"m":
574
delta = datetime.timedelta(0, 0, 0, 0, value)
575
elif suffix == u"h":
576
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
577
elif suffix == u"w":
578
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
579
else:
580
raise ValueError
581
except (ValueError, IndexError):
582
raise ValueError
583
return delta
584
585
586
def server_state_changed(state):
587
"""Derived from the Avahi example code"""
588
if state == avahi.SERVER_COLLISION:
589
logger.error(u"Server name collision")
590
service.remove()
591
elif state == avahi.SERVER_RUNNING:
592
service.add()
593
594
595
def entry_group_state_changed(state, error):
596
"""Derived from the Avahi example code"""
597
logger.debug(u"state change: %i", state)
598
599
if state == avahi.ENTRY_GROUP_ESTABLISHED:
600
logger.debug(u"Service established.")
601
elif state == avahi.ENTRY_GROUP_COLLISION:
602
logger.warning(u"Service name collision.")
603
service.rename()
604
elif state == avahi.ENTRY_GROUP_FAILURE:
605
logger.critical(u"Error in group state changed %s",
606
unicode(error))
607
raise AvahiGroupError("State changed: %s", str(error))
1535
608
1536
609
def if_nametoindex(interface):
1537
"""Call the C function if_nametoindex(), or equivalent
1538
1539
Note: This function cannot accept a unicode string."""
610
"""Call the C function if_nametoindex(), or equivalent"""
1540
611
global if_nametoindex
1541
612
try:
1542
if_nametoindex = (ctypes.cdll.LoadLibrary
1543
(ctypes.util.find_library(u"c"))
1544
.if_nametoindex)
613
if "ctypes.util" not in sys.modules:
614
import ctypes.util
615
if_nametoindex = ctypes.cdll.LoadLibrary\
616
(ctypes.util.find_library("c")).if_nametoindex
1545
617
except (OSError, AttributeError):
1546
logger.warning(u"Doing if_nametoindex the hard way")
618
if "struct" not in sys.modules:
619
import struct
620
if "fcntl" not in sys.modules:
621
import fcntl
1547
622
def if_nametoindex(interface):
1548
623
"Get an interface index the hard way, i.e. using fcntl()"
1549
624
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1550
with contextlib.closing(socket.socket()) as s:
1551
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1552
struct.pack(str(u"16s16x"),
1553
interface))
1554
interface_index = struct.unpack(str(u"I"),
1555
ifreq[16:20])[0]
625
s = socket.socket()
626
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
627
struct.pack("16s16x", interface))
628
s.close()
629
interface_index = struct.unpack("I", ifreq[16:20])[0]
1556
630
return interface_index
1557
631
return if_nametoindex(interface)
1558
632
1559
633
1560
634
def daemon(nochdir = False, noclose = False):
1561
635
"""See daemon(3). Standard BSD Unix function.
1562
1563
636
This should really exist as os.daemon, but it doesn't (yet)."""
1564
637
if os.fork():
1565
638
sys.exit()
1566
639
os.setsid()
1567
640
if not nochdir:
1568
os.chdir(u"/")
641
os.chdir("/")
1569
642
if os.fork():
1570
643
sys.exit()
1571
644
if not noclose:
1573
646
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1574
647
if not stat.S_ISCHR(os.fstat(null).st_mode):
1575
648
raise OSError(errno.ENODEV,
1576
u"%s not a character device"
1577
% os.path.devnull)
649
"/dev/null not a character device")
1578
650
os.dup2(null, sys.stdin.fileno())
1579
651
os.dup2(null, sys.stdout.fileno())
1580
652
os.dup2(null, sys.stderr.fileno())
1583
655
1584
656
1585
657
def main():
1586
1587
##################################################################
1588
# Parsing of options, both command line and config file
1589
1590
parser = optparse.OptionParser(version = "%%prog %s" % version)
1591
parser.add_option("-i", u"--interface", type=u"string",
1592
metavar="IF", help=u"Bind to interface IF")
1593
parser.add_option("-a", u"--address", type=u"string",
1594
help=u"Address to listen for requests on")
1595
parser.add_option("-p", u"--port", type=u"int",
1596
help=u"Port number to receive requests on")
1597
parser.add_option("--check", action=u"store_true",
1598
help=u"Run self-test")
1599
parser.add_option("--debug", action=u"store_true",
1600
help=u"Debug mode; run in foreground and log to"
1601
u" terminal")
1602
parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1603
u" priority string (see GnuTLS documentation)")
1604
parser.add_option("--servicename", type=u"string",
1605
metavar=u"NAME", help=u"Zeroconf service name")
1606
parser.add_option("--configdir", type=u"string",
1607
default=u"/etc/mandos", metavar=u"DIR",
1608
help=u"Directory to search for configuration"
1609
u" files")
1610
parser.add_option("--no-dbus", action=u"store_false",
1611
dest=u"use_dbus", help=u"Do not provide D-Bus"
1612
u" system bus interface")
1613
parser.add_option("--no-ipv6", action=u"store_false",
1614
dest=u"use_ipv6", help=u"Do not use IPv6")
1615
options = parser.parse_args()[0]
658
global main_loop_started
659
main_loop_started = False
660
661
parser = OptionParser(version = "%%prog %s" % version)
662
parser.add_option("-i", "--interface", type="string",
663
metavar="IF", help="Bind to interface IF")
664
parser.add_option("-a", "--address", type="string",
665
help="Address to listen for requests on")
666
parser.add_option("-p", "--port", type="int",
667
help="Port number to receive requests on")
668
parser.add_option("--check", action="store_true", default=False,
669
help="Run self-test")
670
parser.add_option("--debug", action="store_true",
671
help="Debug mode; run in foreground and log to"
672
" terminal")
673
parser.add_option("--priority", type="string", help="GnuTLS"
674
" priority string (see GnuTLS documentation)")
675
parser.add_option("--servicename", type="string", metavar="NAME",
676
help="Zeroconf service name")
677
parser.add_option("--configdir", type="string",
678
default="/etc/mandos", metavar="DIR",
679
help="Directory to search for configuration"
680
" files")
681
(options, args) = parser.parse_args()
1616
682
1617
683
if options.check:
1618
684
import doctest
1620
686
sys.exit()
1621
687
1622
688
# Default values for config file for server-global settings
1623
server_defaults = { u"interface": u"",
1624
u"address": u"",
1625
u"port": u"",
1626
u"debug": u"False",
1627
u"priority":
1628
u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1629
u"servicename": u"Mandos",
1630
u"use_dbus": u"True",
1631
u"use_ipv6": u"True",
689
server_defaults = { "interface": "",
690
"address": "",
691
"port": "",
692
"debug": "False",
693
"priority":
694
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
695
"servicename": "Mandos",
1632
696
}
1633
697
1634
698
# Parse config file for server-global settings
1635
server_config = configparser.SafeConfigParser(server_defaults)
699
server_config = ConfigParser.SafeConfigParser(server_defaults)
1636
700
del server_defaults
1637
server_config.read(os.path.join(options.configdir,
1638
u"mandos.conf"))
701
server_config.read(os.path.join(options.configdir, "mandos.conf"))
702
server_section = "server"
1639
703
# Convert the SafeConfigParser object to a dict
1640
server_settings = server_config.defaults()
1641
# Use the appropriate methods on the non-string config options
1642
for option in (u"debug", u"use_dbus", u"use_ipv6"):
1643
server_settings[option] = server_config.getboolean(u"DEFAULT",
1644
option)
1645
if server_settings["port"]:
1646
server_settings["port"] = server_config.getint(u"DEFAULT",
1647
u"port")
704
server_settings = dict(server_config.items(server_section))
705
# Use getboolean on the boolean config option
706
server_settings["debug"] = server_config.getboolean\
707
(server_section, "debug")
1648
708
del server_config
1649
709
1650
710
# Override the settings from the config file with command line
1651
711
# options, if set.
1652
for option in (u"interface", u"address", u"port", u"debug",
1653
u"priority", u"servicename", u"configdir",
1654
u"use_dbus", u"use_ipv6"):
712
for option in ("interface", "address", "port", "debug",
713
"priority", "servicename", "configdir"):
1655
714
value = getattr(options, option)
1656
715
if value is not None:
1657
716
server_settings[option] = value
1658
717
del options
1659
# Force all strings to be unicode
1660
for option in server_settings.keys():
1661
if type(server_settings[option]) is str:
1662
server_settings[option] = unicode(server_settings[option])
1663
718
# Now we have our good server settings in "server_settings"
1664
719
1665
##################################################################
1666
1667
# For convenience
1668
debug = server_settings[u"debug"]
1669
use_dbus = server_settings[u"use_dbus"]
1670
use_ipv6 = server_settings[u"use_ipv6"]
720
debug = server_settings["debug"]
1671
721
1672
722
if not debug:
1673
723
syslogger.setLevel(logging.WARNING)
1674
724
console.setLevel(logging.WARNING)
1675
725
1676
if server_settings[u"servicename"] != u"Mandos":
1677
syslogger.setFormatter(logging.Formatter
1678
(u'Mandos (%s) [%%(process)d]:'
1679
u' %%(levelname)s: %%(message)s'
1680
% server_settings[u"servicename"]))
726
if server_settings["servicename"] != "Mandos":
727
syslogger.setFormatter(logging.Formatter\
728
('Mandos (%s): %%(levelname)s:'
729
' %%(message)s'
730
% server_settings["servicename"]))
1681
731
1682
732
# Parse config file with clients
1683
client_defaults = { u"timeout": u"1h",
1684
u"interval": u"5m",
1685
u"checker": u"fping -q -- %%(host)s",
1686
u"host": u"",
1687
u"approved_delay": u"5m",
1688
u"approved_duration": u"1s",
733
client_defaults = { "timeout": "1h",
734
"interval": "5m",
735
"checker": "fping -q -- %%(host)s",
1689
736
}
1690
client_config = configparser.SafeConfigParser(client_defaults)
1691
client_config.read(os.path.join(server_settings[u"configdir"],
1692
u"clients.conf"))
1693
1694
global mandos_dbus_service
1695
mandos_dbus_service = None
1696
1697
tcp_server = MandosServer((server_settings[u"address"],
1698
server_settings[u"port"]),
1699
ClientHandler,
1700
interface=server_settings[u"interface"],
1701
use_ipv6=use_ipv6,
1702
gnutls_priority=
1703
server_settings[u"priority"],
1704
use_dbus=use_dbus)
1705
pidfilename = u"/var/run/mandos.pid"
1706
try:
1707
pidfile = open(pidfilename, u"w")
1708
except IOError:
1709
logger.error(u"Could not open file %r", pidfilename)
1710
1711
try:
1712
uid = pwd.getpwnam(u"_mandos").pw_uid
1713
gid = pwd.getpwnam(u"_mandos").pw_gid
1714
except KeyError:
1715
try:
1716
uid = pwd.getpwnam(u"mandos").pw_uid
1717
gid = pwd.getpwnam(u"mandos").pw_gid
1718
except KeyError:
1719
try:
1720
uid = pwd.getpwnam(u"nobody").pw_uid
1721
gid = pwd.getpwnam(u"nobody").pw_gid
1722
except KeyError:
1723
uid = 65534
1724
gid = 65534
1725
try:
1726
os.setgid(gid)
1727
os.setuid(uid)
1728
except OSError, error:
1729
if error[0] != errno.EPERM:
1730
raise error
1731
1732
# Enable all possible GnuTLS debugging
1733
if debug:
1734
# "Use a log level over 10 to enable all debugging options."
1735
# - GnuTLS manual
1736
gnutls.library.functions.gnutls_global_set_log_level(11)
1737
1738
@gnutls.library.types.gnutls_log_func
1739
def debug_gnutls(level, string):
1740
logger.debug(u"GnuTLS: %s", string[:-1])
1741
1742
(gnutls.library.functions
1743
.gnutls_global_set_log_function(debug_gnutls))
737
client_config = ConfigParser.SafeConfigParser(client_defaults)
738
client_config.read(os.path.join(server_settings["configdir"],
739
"clients.conf"))
740
741
global service
742
service = AvahiService(name = server_settings["servicename"],
743
type = "_mandos._tcp", );
744
if server_settings["interface"]:
745
service.interface = if_nametoindex(server_settings["interface"])
1744
746
1745
747
global main_loop
748
global bus
749
global server
1746
750
# From the Avahi example code
1747
751
DBusGMainLoop(set_as_default=True )
1748
752
main_loop = gobject.MainLoop()
1749
753
bus = dbus.SystemBus()
754
server = dbus.Interface(
755
bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
756
avahi.DBUS_INTERFACE_SERVER )
1750
757
# End of Avahi example code
1751
if use_dbus:
1752
try:
1753
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos",
1754
bus, do_not_queue=True)
1755
except dbus.exceptions.NameExistsException, e:
1756
logger.error(unicode(e) + u", disabling D-Bus")
1757
use_dbus = False
1758
server_settings[u"use_dbus"] = False
1759
tcp_server.use_dbus = False
1760
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1761
service = AvahiService(name = server_settings[u"servicename"],
1762
servicetype = u"_mandos._tcp",
1763
protocol = protocol, bus = bus)
1764
if server_settings["interface"]:
1765
service.interface = (if_nametoindex
1766
(str(server_settings[u"interface"])))
1767
1768
client_class = Client
1769
if use_dbus:
1770
client_class = functools.partial(ClientDBus, bus = bus)
1771
def client_config_items(config, section):
1772
special_settings = {
1773
"approved_by_default":
1774
lambda: config.getboolean(section,
1775
"approved_by_default"),
1776
}
1777
for name, value in config.items(section):
1778
try:
1779
yield (name, special_settings[name]())
1780
except KeyError:
1781
yield (name, value)
1782
1783
tcp_server.clients.update(set(
1784
client_class(name = section,
1785
config= dict(client_config_items(
1786
client_config, section)))
1787
for section in client_config.sections()))
1788
if not tcp_server.clients:
1789
logger.warning(u"No clients defined")
1790
1791
if debug:
1792
# Redirect stdin so all checkers get /dev/null
1793
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1794
os.dup2(null, sys.stdin.fileno())
1795
if null > 2:
1796
os.close(null)
1797
else:
1798
# No console logging
758
759
clients = Set()
760
def remove_from_clients(client):
761
clients.remove(client)
762
if not clients:
763
logger.critical(u"No clients left, exiting")
764
sys.exit()
765
766
clients.update(Set(Client(name = section,
767
stop_hook = remove_from_clients,
768
config
769
= dict(client_config.items(section)))
770
for section in client_config.sections()))
771
if not clients:
772
logger.critical(u"No clients defined")
773
sys.exit(1)
774
775
if not debug:
1799
776
logger.removeHandler(console)
1800
# Close all input and output, do double fork, etc.
1801
777
daemon()
1802
778
779
pidfilename = "/var/run/mandos/mandos.pid"
780
pid = os.getpid()
1803
781
try:
1804
with pidfile:
1805
pid = os.getpid()
1806
pidfile.write(str(pid) + "\n")
782
pidfile = open(pidfilename, "w")
783
pidfile.write(str(pid) + "\n")
784
pidfile.close()
1807
785
del pidfile
1808
except IOError:
1809
logger.error(u"Could not write to file %r with PID %d",
1810
pidfilename, pid)
1811
except NameError:
1812
# "pidfile" was never created
1813
pass
1814
del pidfilename
786
except IOError, err:
787
logger.error(u"Could not write %s file with PID %d",
788
pidfilename, os.getpid())
789
790
def cleanup():
791
"Cleanup function; run on exit"
792
global group
793
# From the Avahi example code
794
if not group is None:
795
group.Free()
796
group = None
797
# End of Avahi example code
798
799
while clients:
800
client = clients.pop()
801
client.stop_hook = None
802
client.stop()
803
804
atexit.register(cleanup)
1815
805
1816
806
if not debug:
1817
807
signal.signal(signal.SIGINT, signal.SIG_IGN)
1818
808
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1819
809
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1820
810
1821
if use_dbus:
1822
class MandosDBusService(dbus.service.Object):
1823
"""A D-Bus proxy object"""
1824
def __init__(self):
1825
dbus.service.Object.__init__(self, bus, u"/")
1826
_interface = u"se.bsnet.fukt.Mandos"
1827
1828
@dbus.service.signal(_interface, signature=u"o")
1829
def ClientAdded(self, objpath):
1830
"D-Bus signal"
1831
pass
1832
1833
@dbus.service.signal(_interface, signature=u"ss")
1834
def ClientNotFound(self, fingerprint, address):
1835
"D-Bus signal"
1836
pass
1837
1838
@dbus.service.signal(_interface, signature=u"os")
1839
def ClientRemoved(self, objpath, name):
1840
"D-Bus signal"
1841
pass
1842
1843
@dbus.service.method(_interface, out_signature=u"ao")
1844
def GetAllClients(self):
1845
"D-Bus method"
1846
return dbus.Array(c.dbus_object_path
1847
for c in tcp_server.clients)
1848
1849
@dbus.service.method(_interface,
1850
out_signature=u"a{oa{sv}}")
1851
def GetAllClientsWithProperties(self):
1852
"D-Bus method"
1853
return dbus.Dictionary(
1854
((c.dbus_object_path, c.GetAll(u""))
1855
for c in tcp_server.clients),
1856
signature=u"oa{sv}")
1857
1858
@dbus.service.method(_interface, in_signature=u"o")
1859
def RemoveClient(self, object_path):
1860
"D-Bus method"
1861
for c in tcp_server.clients:
1862
if c.dbus_object_path == object_path:
1863
tcp_server.clients.remove(c)
1864
c.remove_from_connection()
1865
# Don't signal anything except ClientRemoved
1866
c.disable(quiet=True)
1867
# Emit D-Bus signal
1868
self.ClientRemoved(object_path, c.name)
1869
return
1870
raise KeyError(object_path)
1871
1872
del _interface
1873
1874
mandos_dbus_service = MandosDBusService()
1875
1876
def cleanup():
1877
"Cleanup function; run on exit"
1878
service.cleanup()
1879
1880
while tcp_server.clients:
1881
client = tcp_server.clients.pop()
1882
if use_dbus:
1883
client.remove_from_connection()
1884
client.disable_hook = None
1885
# Don't signal anything except ClientRemoved
1886
client.disable(quiet=True)
1887
if use_dbus:
1888
# Emit D-Bus signal
1889
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
1890
client.name)
1891
1892
atexit.register(cleanup)
1893
1894
for client in tcp_server.clients:
1895
if use_dbus:
1896
# Emit D-Bus signal
1897
mandos_dbus_service.ClientAdded(client.dbus_object_path)
1898
client.enable()
1899
1900
tcp_server.enable()
1901
tcp_server.server_activate()
1902
811
for client in clients:
812
client.start()
813
814
tcp_server = IPv6_TCPServer((server_settings["address"],
815
server_settings["port"]),
816
tcp_handler,
817
settings=server_settings,
818
clients=clients)
1903
819
# Find out what port we got
1904
820
service.port = tcp_server.socket.getsockname()[1]
1905
if use_ipv6:
1906
logger.info(u"Now listening on address %r, port %d,"
1907
" flowinfo %d, scope_id %d"
1908
% tcp_server.socket.getsockname())
1909
else: # IPv4
1910
logger.info(u"Now listening on address %r, port %d"
1911
% tcp_server.socket.getsockname())
821
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
822
u" scope_id %d" % tcp_server.socket.getsockname())
1912
823
1913
824
#service.interface = tcp_server.socket.getsockname()[3]
1914
825
1915
826
try:
1916
827
# From the Avahi example code
828
server.connect_to_signal("StateChanged", server_state_changed)
1917
829
try:
1918
service.activate()
830
server_state_changed(server.GetState())
1919
831
except dbus.exceptions.DBusException, error:
1920
832
logger.critical(u"DBusException: %s", error)
1921
cleanup()
1922
833
sys.exit(1)
1923
834
# End of Avahi example code
1924
835
1925
836
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
1926
837
lambda *args, **kwargs:
1927
(tcp_server.handle_request
1928
(*args[2:], **kwargs) or True))
838
tcp_server.handle_request\
839
(*args[2:], **kwargs) or True)
1929
840
1930
841
logger.debug(u"Starting main loop")
842
main_loop_started = True
1931
843
main_loop.run()
1932
844
except AvahiError, error:
1933
logger.critical(u"AvahiError: %s", error)
1934
cleanup()
845
logger.critical(u"AvahiError: %s" + unicode(error))
1935
846
sys.exit(1)
1936
847
except KeyboardInterrupt:
1937
848
if debug:
1938
print >> sys.stderr
1939
logger.debug(u"Server received KeyboardInterrupt")
1940
logger.debug(u"Server exiting")
1941
# Must run before the D-Bus bus name gets deregistered
1942
cleanup()
849
print
1943
850
1944
851
if __name__ == '__main__':
1945
852
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0