To get this branch, use:
bzr branch
http://bzr.recompile.se/loggerhead/mandos/trunk
« back to all changes in this revision
Viewing changes to mandos
- browse files at revision 236
- compare with another revision
- download diff
- download tarball
- view history from revision 236
- Committer: Teddy Hogeborn
- Date: 2008-11-01 02:26:00 UTC
- Revision ID: teddy@fukt.bsnet.se-20081101022600-bacs9fxmsliqrah1
* initramfs-tools-hook: Also ignore plugins named "*.dpkg-bak".
* plugin-runner.c: - '' -
* plugin-runner.c: - '' -
- files added:
- debian/mandos-client.config
- files removed:
- dbus-mandos.conf
- files modified:
- INSTALL
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 © 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
31
30
# Contact the authors at <mandos@fukt.bsnet.se>.
32
31
#
33
32
34
from __future__ import division, with_statement, absolute_import
33
from __future__ import division
35
34
36
import SocketServer as socketserver
35
import SocketServer
37
36
import socket
38
import optparse
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
57
import pwd
58
import contextlib
59
import struct
60
import fcntl
61
import functools
62
import cPickle as pickle
63
import multiprocessing
64
58
65
59
import dbus
66
import dbus.service
67
60
import gobject
68
61
import avahi
69
62
from dbus.mainloop.glib import DBusGMainLoop
70
63
import ctypes
71
64
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'))
65
66
version = "1.0.2"
67
68
logger = logging.Logger('mandos')
69
syslogger = logging.handlers.SysLogHandler\
70
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
71
address = "/dev/log")
72
syslogger.setFormatter(logging.Formatter\
73
('Mandos: %(levelname)s: %(message)s'))
93
74
logger.addHandler(syslogger)
94
75
95
76
console = logging.StreamHandler()
96
console.setFormatter(logging.Formatter(u'%(name)s [%(process)d]:'
97
u' %(levelname)s:'
98
u' %(message)s'))
77
console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
78
' %(message)s'))
99
79
logger.addHandler(console)
100
80
101
multiprocessing_manager = multiprocessing.Manager()
102
103
81
class AvahiError(Exception):
104
def __init__(self, value, *args, **kwargs):
82
def __init__(self, value):
105
83
self.value = value
106
super(AvahiError, self).__init__(value, *args, **kwargs)
107
def __unicode__(self):
108
return unicode(repr(self.value))
84
super(AvahiError, self).__init__()
85
def __str__(self):
86
return repr(self.value)
109
87
110
88
class AvahiServiceError(AvahiError):
111
89
pass
116
94
117
95
class AvahiService(object):
118
96
"""An Avahi (Zeroconf) service.
119
120
97
Attributes:
121
98
interface: integer; avahi.IF_UNSPEC or an interface index.
122
99
Used to optionally bind to the specified interface.
123
name: string; Example: u'Mandos'
124
type: string; Example: u'_mandos._tcp'.
100
name: string; Example: 'Mandos'
101
type: string; Example: '_mandos._tcp'.
125
102
See <http://www.dns-sd.org/ServiceTypes.html>
126
103
port: integer; what port to announce
127
104
TXT: list of strings; TXT record for the service
130
107
max_renames: integer; maximum number of renames
131
108
rename_count: integer; counter so we only rename after collisions
132
109
a sensible number of times
133
group: D-Bus Entry Group
134
server: D-Bus Server
135
bus: dbus.SystemBus()
136
110
"""
137
111
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):
112
servicetype = None, port = None, TXT = None, domain = "",
113
host = "", max_renames = 32768):
141
114
self.interface = interface
142
115
self.name = name
143
116
self.type = servicetype
144
117
self.port = port
145
self.TXT = TXT if TXT is not None else []
118
if TXT is None:
119
self.TXT = []
120
else:
121
self.TXT = TXT
146
122
self.domain = domain
147
123
self.host = host
148
124
self.rename_count = 0
149
125
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
126
def rename(self):
155
127
"""Derived from the Avahi example code"""
156
128
if self.rename_count >= self.max_renames:
157
129
logger.critical(u"No suitable Zeroconf service name found"
158
130
u" after %i retries, exiting.",
159
131
self.rename_count)
160
raise AvahiServiceError(u"Too many renames")
161
self.name = self.server.GetAlternativeServiceName(self.name)
132
raise AvahiServiceError("Too many renames")
133
self.name = server.GetAlternativeServiceName(self.name)
162
134
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))
135
str(self.name))
136
syslogger.setFormatter(logging.Formatter\
137
('Mandos (%s): %%(levelname)s:'
138
' %%(message)s' % self.name))
168
139
self.remove()
169
140
self.add()
170
141
self.rename_count += 1
171
142
def remove(self):
172
143
"""Derived from the Avahi example code"""
173
if self.group is not None:
174
self.group.Reset()
144
if group is not None:
145
group.Reset()
175
146
def add(self):
176
147
"""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)
148
global group
149
if group is None:
150
group = dbus.Interface\
151
(bus.get_object(avahi.DBUS_NAME,
152
server.EntryGroupNew()),
153
avahi.DBUS_INTERFACE_ENTRY_GROUP)
154
group.connect_to_signal('StateChanged',
155
entry_group_state_changed)
185
156
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())
157
service.name, service.type)
158
group.AddService(
159
self.interface, # interface
160
avahi.PROTO_INET6, # protocol
161
dbus.UInt32(0), # flags
162
self.name, self.type,
163
self.domain, self.host,
164
dbus.UInt16(self.port),
165
avahi.string_array_to_txt_array(self.TXT))
166
group.Commit()
167
168
# From the Avahi example code:
169
group = None # our entry group
170
# End of Avahi example code
232
171
233
172
234
173
class Client(object):
235
174
"""A representation of a client host served by this server.
236
237
175
Attributes:
238
name: string; from the config file, used in log messages and
239
D-Bus identifiers
176
name: string; from the config file, used in log messages
240
177
fingerprint: string (40 or 32 hexadecimal digits); used to
241
178
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.
179
secret: bytestring; sent verbatim (over TLS) to client
180
host: string; available for use by the checker command
181
created: datetime.datetime(); object creation, not client host
182
last_checked_ok: datetime.datetime() or None if not yet checked OK
183
timeout: datetime.timedelta(); How long from last_checked_ok
184
until this client is invalid
185
interval: datetime.timedelta(); How often to start a new checker
186
stop_hook: If set, called by stop() as stop_hook(self)
187
checker: subprocess.Popen(); a running checker process used
188
to see if the client lives.
189
'None' if no process is running.
255
190
checker_initiator_tag: a gobject event source tag, or None
256
disable_initiator_tag: - '' -
191
stop_initiator_tag: - '' -
257
192
checker_callback_tag: - '' -
258
193
checker_command: string; External command which is run to check if
259
194
client lives. %() expansions are done at
260
195
runtime with vars(self) as dict, so that for
261
196
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
197
Private attibutes:
198
_timeout: Real variable for 'timeout'
199
_interval: Real variable for 'interval'
200
_timeout_milliseconds: Used when calling gobject.timeout_add()
201
_interval_milliseconds: - '' -
266
202
"""
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):
203
def _set_timeout(self, timeout):
204
"Setter function for 'timeout' attribute"
205
self._timeout = timeout
206
self._timeout_milliseconds = ((self.timeout.days
207
* 24 * 60 * 60 * 1000)
208
+ (self.timeout.seconds * 1000)
209
+ (self.timeout.microseconds
210
// 1000))
211
timeout = property(lambda self: self._timeout,
212
_set_timeout)
213
del _set_timeout
214
def _set_interval(self, interval):
215
"Setter function for 'interval' attribute"
216
self._interval = interval
217
self._interval_milliseconds = ((self.interval.days
218
* 24 * 60 * 60 * 1000)
219
+ (self.interval.seconds
220
* 1000)
221
+ (self.interval.microseconds
222
// 1000))
223
interval = property(lambda self: self._interval,
224
_set_interval)
225
del _set_interval
226
def __init__(self, name = None, stop_hook=None, config=None):
287
227
"""Note: the 'checker' key in 'config' sets the
288
228
'checker_command' attribute and *not* the 'checker'
289
229
attribute."""
290
self.name = name
291
230
if config is None:
292
231
config = {}
232
self.name = name
293
233
logger.debug(u"Creating client %r", self.name)
294
234
# Uppercase and remove spaces from fingerprint for later
295
235
# comparison purposes with return value from the fingerprint()
296
236
# function
297
self.fingerprint = (config[u"fingerprint"].upper()
298
.replace(u" ", u""))
237
self.fingerprint = config["fingerprint"].upper()\
238
.replace(u" ", u"")
299
239
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()
240
if "secret" in config:
241
self.secret = config["secret"].decode(u"base64")
242
elif "secfile" in config:
243
secfile = open(os.path.expanduser(os.path.expandvars
244
(config["secfile"])))
245
self.secret = secfile.read()
246
secfile.close()
307
247
else:
308
#XXX Need to allow secret on demand!
309
248
raise TypeError(u"No secret or secfile for client %s"
310
249
% 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
250
self.host = config.get("host", "")
251
self.created = datetime.datetime.now()
315
252
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
253
self.timeout = string_to_delta(config["timeout"])
254
self.interval = string_to_delta(config["interval"])
255
self.stop_hook = stop_hook
319
256
self.checker = None
320
257
self.checker_initiator_tag = None
321
self.disable_initiator_tag = None
258
self.stop_initiator_tag = None
322
259
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
True)
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):
260
self.check_command = config["checker"]
261
def start(self):
342
262
"""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
263
# Schedule a new checker to be started an 'interval' from now,
349
264
# 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
265
self.checker_initiator_tag = gobject.timeout_add\
266
(self._interval_milliseconds,
267
self.start_checker)
358
268
# Also start a new checker *right now*.
359
269
self.start_checker()
360
361
def disable(self, quiet=True):
362
"""Disable this client."""
363
if not getattr(self, "enabled", False):
270
# Schedule a stop() when 'timeout' has passed
271
self.stop_initiator_tag = gobject.timeout_add\
272
(self._timeout_milliseconds,
273
self.stop)
274
def stop(self):
275
"""Stop this client.
276
The possibility that a client might be restarted is left open,
277
but not currently used."""
278
# If this client doesn't have a secret, it is already stopped.
279
if hasattr(self, "secret") and self.secret:
280
logger.info(u"Stopping client %s", self.name)
281
self.secret = None
282
else:
364
283
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):
284
if getattr(self, "stop_initiator_tag", False):
285
gobject.source_remove(self.stop_initiator_tag)
286
self.stop_initiator_tag = None
287
if getattr(self, "checker_initiator_tag", False):
373
288
gobject.source_remove(self.checker_initiator_tag)
374
289
self.checker_initiator_tag = None
375
290
self.stop_checker()
376
if self.disable_hook:
377
self.disable_hook(self)
378
self.enabled = False
291
if self.stop_hook:
292
self.stop_hook(self)
379
293
# Do not run this again if called by a gobject.timeout_add
380
294
return False
381
382
295
def __del__(self):
383
self.disable_hook = None
384
self.disable()
385
386
def checker_callback(self, pid, condition, command):
296
self.stop_hook = None
297
self.stop()
298
def checker_callback(self, pid, condition):
387
299
"""The checker has completed, so take appropriate actions."""
300
now = datetime.datetime.now()
388
301
self.checker_callback_tag = None
389
302
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:
303
if os.WIFEXITED(condition) \
304
and (os.WEXITSTATUS(condition) == 0):
305
logger.info(u"Checker for %(name)s succeeded",
306
vars(self))
307
self.last_checked_ok = now
308
gobject.source_remove(self.stop_initiator_tag)
309
self.stop_initiator_tag = gobject.timeout_add\
310
(self._timeout_milliseconds,
311
self.stop)
312
elif not os.WIFEXITED(condition):
400
313
logger.warning(u"Checker for %(name)s crashed?",
401
314
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
315
else:
316
logger.info(u"Checker for %(name)s failed",
317
vars(self))
415
318
def start_checker(self):
416
319
"""Start a new checker subprocess if one is not running.
417
418
320
If a checker already exists, leave it running and do
419
321
nothing."""
420
322
# The reason for not killing a running checker is that if we
423
325
# client would inevitably timeout, since no checker would get
424
326
# a chance to run to completion. If we instead leave running
425
327
# 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
328
# than 'timeout' for the client to be declared invalid, which
329
# is as it should be.
443
330
if self.checker is None:
444
331
try:
445
# In case checker_command has exactly one % operator
446
command = self.checker_command % self.host
332
# In case check_command has exactly one % operator
333
command = self.check_command % self.host
447
334
except TypeError:
448
335
# Escape attributes for the shell
449
escaped_attrs = dict((key,
450
re.escape(unicode(str(val),
451
errors=
452
u'replace')))
336
escaped_attrs = dict((key, re.escape(str(val)))
453
337
for key, val in
454
338
vars(self).iteritems())
455
339
try:
456
command = self.checker_command % escaped_attrs
340
command = self.check_command % escaped_attrs
457
341
except TypeError, error:
458
342
logger.error(u'Could not format string "%s":'
459
u' %s', self.checker_command, error)
343
u' %s', self.check_command, error)
460
344
return True # Try again later
461
self.current_checker_command = command
462
345
try:
463
346
logger.info(u"Starting checker %r for %s",
464
347
command, self.name)
468
351
# always replaced by /dev/null.)
469
352
self.checker = subprocess.Popen(command,
470
353
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)
354
shell=True, cwd="/")
355
self.checker_callback_tag = gobject.child_watch_add\
356
(self.checker.pid,
357
self.checker_callback)
482
358
except OSError, error:
483
359
logger.error(u"Failed to start subprocess: %s",
484
360
error)
485
361
# Re-run this periodically if run by gobject.timeout_add
486
362
return True
487
488
363
def stop_checker(self):
489
364
"""Force the checker process, if any, to stop."""
490
365
if self.checker_callback_tag:
491
366
gobject.source_remove(self.checker_callback_tag)
492
367
self.checker_callback_tag = None
493
if getattr(self, u"checker", None) is None:
368
if getattr(self, "checker", None) is None:
494
369
return
495
370
logger.debug(u"Stopping checker for %(name)s", vars(self))
496
371
try:
497
372
os.kill(self.checker.pid, signal.SIGTERM)
498
#time.sleep(0.5)
373
#os.sleep(0.5)
499
374
#if self.checker.poll() is None:
500
375
# os.kill(self.checker.pid, signal.SIGKILL)
501
376
except OSError, error:
502
377
if error.errno != errno.ESRCH: # No such process
503
378
raise
504
379
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
if self.approved_pending():
849
self.PropertyChanged(dbus.String(u"checker_running"),
850
dbus.Boolean(False, variant_level=1))
851
852
# Rejected - signal
853
@dbus.service.signal(_interface, signature=u"s")
854
def Rejected(self, reason):
855
"D-Bus signal"
856
if self.approved_pending():
857
self.PropertyChanged(dbus.String(u"checker_running"),
858
dbus.Boolean(False, variant_level=1))
859
860
# NeedApproval - signal
861
@dbus.service.signal(_interface, signature=u"db")
862
def NeedApproval(self, timeout, default):
863
"D-Bus signal"
864
if not self.approved_pending():
865
self.PropertyChanged(dbus.String(u"approved_pending"),
866
dbus.Boolean(True, variant_level=1))
867
868
## Methods
869
870
# Approve - method
871
@dbus.service.method(_interface, in_signature=u"b")
872
def Approve(self, value):
873
self.approve(value)
874
875
# CheckedOK - method
876
@dbus.service.method(_interface)
877
def CheckedOK(self):
878
return self.checked_ok()
879
880
# Enable - method
881
@dbus.service.method(_interface)
882
def Enable(self):
883
"D-Bus method"
884
self.enable()
885
886
# StartChecker - method
887
@dbus.service.method(_interface)
888
def StartChecker(self):
889
"D-Bus method"
890
self.start_checker()
891
892
# Disable - method
893
@dbus.service.method(_interface)
894
def Disable(self):
895
"D-Bus method"
896
self.disable()
897
898
# StopChecker - method
899
@dbus.service.method(_interface)
900
def StopChecker(self):
901
self.stop_checker()
902
903
## Properties
904
905
# approved_pending - property
906
@dbus_service_property(_interface, signature=u"b", access=u"read")
907
def approved_pending_dbus_property(self):
908
return dbus.Boolean(self.approved_pending())
909
910
# approved_by_default - property
911
@dbus_service_property(_interface, signature=u"b",
912
access=u"readwrite")
913
def approved_by_default_dbus_property(self):
914
return dbus.Boolean(self.approved_by_default)
915
916
# approved_delay - property
917
@dbus_service_property(_interface, signature=u"t",
918
access=u"readwrite")
919
def approved_delay_dbus_property(self):
920
return dbus.UInt64(self.approved_delay_milliseconds())
921
922
# approved_duration - property
923
@dbus_service_property(_interface, signature=u"t",
924
access=u"readwrite")
925
def approved_duration_dbus_property(self):
926
return dbus.UInt64(self._timedelta_to_milliseconds(
927
self.approved_duration))
928
929
# name - property
930
@dbus_service_property(_interface, signature=u"s", access=u"read")
931
def name_dbus_property(self):
932
return dbus.String(self.name)
933
934
# fingerprint - property
935
@dbus_service_property(_interface, signature=u"s", access=u"read")
936
def fingerprint_dbus_property(self):
937
return dbus.String(self.fingerprint)
938
939
# host - property
940
@dbus_service_property(_interface, signature=u"s",
941
access=u"readwrite")
942
def host_dbus_property(self, value=None):
943
if value is None: # get
944
return dbus.String(self.host)
945
self.host = value
946
# Emit D-Bus signal
947
self.PropertyChanged(dbus.String(u"host"),
948
dbus.String(value, variant_level=1))
949
950
# created - property
951
@dbus_service_property(_interface, signature=u"s", access=u"read")
952
def created_dbus_property(self):
953
return dbus.String(self._datetime_to_dbus(self.created))
954
955
# last_enabled - property
956
@dbus_service_property(_interface, signature=u"s", access=u"read")
957
def last_enabled_dbus_property(self):
958
if self.last_enabled is None:
959
return dbus.String(u"")
960
return dbus.String(self._datetime_to_dbus(self.last_enabled))
961
962
# enabled - property
963
@dbus_service_property(_interface, signature=u"b",
964
access=u"readwrite")
965
def enabled_dbus_property(self, value=None):
966
if value is None: # get
967
return dbus.Boolean(self.enabled)
968
if value:
969
self.enable()
970
else:
971
self.disable()
972
973
# last_checked_ok - property
974
@dbus_service_property(_interface, signature=u"s",
975
access=u"readwrite")
976
def last_checked_ok_dbus_property(self, value=None):
977
if value is not None:
978
self.checked_ok()
979
return
380
def still_valid(self):
381
"""Has the timeout not yet passed for this client?"""
382
now = datetime.datetime.now()
980
383
if self.last_checked_ok is None:
981
return dbus.String(u"")
982
return dbus.String(self._datetime_to_dbus(self
983
.last_checked_ok))
984
985
# timeout - property
986
@dbus_service_property(_interface, signature=u"t",
987
access=u"readwrite")
988
def timeout_dbus_property(self, value=None):
989
if value is None: # get
990
return dbus.UInt64(self.timeout_milliseconds())
991
self.timeout = datetime.timedelta(0, 0, 0, value)
992
# Emit D-Bus signal
993
self.PropertyChanged(dbus.String(u"timeout"),
994
dbus.UInt64(value, variant_level=1))
995
if getattr(self, u"disable_initiator_tag", None) is None:
996
return
997
# Reschedule timeout
998
gobject.source_remove(self.disable_initiator_tag)
999
self.disable_initiator_tag = None
1000
time_to_die = (self.
1001
_timedelta_to_milliseconds((self
1002
.last_checked_ok
1003
+ self.timeout)
1004
- datetime.datetime
1005
.utcnow()))
1006
if time_to_die <= 0:
1007
# The timeout has passed
1008
self.disable()
1009
else:
1010
self.disable_initiator_tag = (gobject.timeout_add
1011
(time_to_die, self.disable))
1012
1013
# interval - property
1014
@dbus_service_property(_interface, signature=u"t",
1015
access=u"readwrite")
1016
def interval_dbus_property(self, value=None):
1017
if value is None: # get
1018
return dbus.UInt64(self.interval_milliseconds())
1019
self.interval = datetime.timedelta(0, 0, 0, value)
1020
# Emit D-Bus signal
1021
self.PropertyChanged(dbus.String(u"interval"),
1022
dbus.UInt64(value, variant_level=1))
1023
if getattr(self, u"checker_initiator_tag", None) is None:
1024
return
1025
# Reschedule checker run
1026
gobject.source_remove(self.checker_initiator_tag)
1027
self.checker_initiator_tag = (gobject.timeout_add
1028
(value, self.start_checker))
1029
self.start_checker() # Start one now, too
1030
1031
# checker - property
1032
@dbus_service_property(_interface, signature=u"s",
1033
access=u"readwrite")
1034
def checker_dbus_property(self, value=None):
1035
if value is None: # get
1036
return dbus.String(self.checker_command)
1037
self.checker_command = value
1038
# Emit D-Bus signal
1039
self.PropertyChanged(dbus.String(u"checker"),
1040
dbus.String(self.checker_command,
1041
variant_level=1))
1042
1043
# checker_running - property
1044
@dbus_service_property(_interface, signature=u"b",
1045
access=u"readwrite")
1046
def checker_running_dbus_property(self, value=None):
1047
if value is None: # get
1048
return dbus.Boolean(self.checker is not None)
1049
if value:
1050
self.start_checker()
1051
else:
1052
self.stop_checker()
1053
1054
# object_path - property
1055
@dbus_service_property(_interface, signature=u"o", access=u"read")
1056
def object_path_dbus_property(self):
1057
return self.dbus_object_path # is already a dbus.ObjectPath
1058
1059
# secret = property
1060
@dbus_service_property(_interface, signature=u"ay",
1061
access=u"write", byte_arrays=True)
1062
def secret_dbus_property(self, value):
1063
self.secret = str(value)
1064
1065
del _interface
1066
1067
1068
class ProxyClient(object):
1069
def __init__(self, child_pipe, fpr, address):
1070
self._pipe = child_pipe
1071
self._pipe.send(('init', fpr, address))
1072
if not self._pipe.recv():
1073
raise KeyError()
1074
1075
def __getattribute__(self, name):
1076
if(name == '_pipe'):
1077
return super(ProxyClient, self).__getattribute__(name)
1078
self._pipe.send(('getattr', name))
1079
data = self._pipe.recv()
1080
if data[0] == 'data':
1081
return data[1]
1082
if data[0] == 'function':
1083
def func(*args, **kwargs):
1084
self._pipe.send(('funcall', name, args, kwargs))
1085
return self._pipe.recv()[1]
1086
return func
1087
1088
def __setattr__(self, name, value):
1089
if(name == '_pipe'):
1090
return super(ProxyClient, self).__setattr__(name, value)
1091
self._pipe.send(('setattr', name, value))
1092
1093
1094
class ClientHandler(socketserver.BaseRequestHandler, object):
1095
"""A class to handle client connections.
1096
1097
Instantiated once for each connection to handle it.
384
return now < (self.created + self.timeout)
385
else:
386
return now < (self.last_checked_ok + self.timeout)
387
388
389
def peer_certificate(session):
390
"Return the peer's OpenPGP certificate as a bytestring"
391
# If not an OpenPGP certificate...
392
if gnutls.library.functions.gnutls_certificate_type_get\
393
(session._c_object) \
394
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP:
395
# ...do the normal thing
396
return session.peer_certificate
397
list_size = ctypes.c_uint()
398
cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
399
(session._c_object, ctypes.byref(list_size))
400
if list_size.value == 0:
401
return None
402
cert = cert_list[0]
403
return ctypes.string_at(cert.data, cert.size)
404
405
406
def fingerprint(openpgp):
407
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
408
# New GnuTLS "datum" with the OpenPGP public key
409
datum = gnutls.library.types.gnutls_datum_t\
410
(ctypes.cast(ctypes.c_char_p(openpgp),
411
ctypes.POINTER(ctypes.c_ubyte)),
412
ctypes.c_uint(len(openpgp)))
413
# New empty GnuTLS certificate
414
crt = gnutls.library.types.gnutls_openpgp_crt_t()
415
gnutls.library.functions.gnutls_openpgp_crt_init\
416
(ctypes.byref(crt))
417
# Import the OpenPGP public key into the certificate
418
gnutls.library.functions.gnutls_openpgp_crt_import\
419
(crt, ctypes.byref(datum),
420
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
421
# Verify the self signature in the key
422
crtverify = ctypes.c_uint()
423
gnutls.library.functions.gnutls_openpgp_crt_verify_self\
424
(crt, 0, ctypes.byref(crtverify))
425
if crtverify.value != 0:
426
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
427
raise gnutls.errors.CertificateSecurityError("Verify failed")
428
# New buffer for the fingerprint
429
buf = ctypes.create_string_buffer(20)
430
buf_len = ctypes.c_size_t()
431
# Get the fingerprint from the certificate into the buffer
432
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
433
(crt, ctypes.byref(buf), ctypes.byref(buf_len))
434
# Deinit the certificate
435
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
436
# Convert the buffer to a Python bytestring
437
fpr = ctypes.string_at(buf, buf_len.value)
438
# Convert the bytestring to hexadecimal notation
439
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
440
return hex_fpr
441
442
443
class TCP_handler(SocketServer.BaseRequestHandler, object):
444
"""A TCP request handler class.
445
Instantiated by IPv6_TCPServer for each request to handle it.
1098
446
Note: This will run in its own forked process."""
1099
447
1100
448
def handle(self):
1101
with contextlib.closing(self.server.child_pipe) as child_pipe:
1102
logger.info(u"TCP connection from: %s",
1103
unicode(self.client_address))
1104
logger.debug(u"Pipe FD: %d",
1105
self.server.child_pipe.fileno())
1106
1107
session = (gnutls.connection
1108
.ClientSession(self.request,
1109
gnutls.connection
1110
.X509Credentials()))
1111
1112
# Note: gnutls.connection.X509Credentials is really a
1113
# generic GnuTLS certificate credentials object so long as
1114
# no X.509 keys are added to it. Therefore, we can use it
1115
# here despite using OpenPGP certificates.
1116
1117
#priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
1118
# u"+AES-256-CBC", u"+SHA1",
1119
# u"+COMP-NULL", u"+CTYPE-OPENPGP",
1120
# u"+DHE-DSS"))
1121
# Use a fallback default, since this MUST be set.
1122
priority = self.server.gnutls_priority
1123
if priority is None:
1124
priority = u"NORMAL"
1125
(gnutls.library.functions
1126
.gnutls_priority_set_direct(session._c_object,
1127
priority, None))
1128
1129
# Start communication using the Mandos protocol
1130
# Get protocol number
1131
line = self.request.makefile().readline()
1132
logger.debug(u"Protocol version: %r", line)
1133
try:
1134
if int(line.strip().split()[0]) > 1:
1135
raise RuntimeError
1136
except (ValueError, IndexError, RuntimeError), error:
1137
logger.error(u"Unknown protocol version: %s", error)
1138
return
1139
1140
# Start GnuTLS connection
1141
try:
1142
session.handshake()
1143
except gnutls.errors.GNUTLSError, error:
1144
logger.warning(u"Handshake failed: %s", error)
1145
# Do not run session.bye() here: the session is not
1146
# established. Just abandon the request.
1147
return
1148
logger.debug(u"Handshake succeeded")
1149
1150
approval_required = False
1151
try:
1152
try:
1153
fpr = self.fingerprint(self.peer_certificate
1154
(session))
1155
except (TypeError, gnutls.errors.GNUTLSError), error:
1156
logger.warning(u"Bad certificate: %s", error)
1157
return
1158
logger.debug(u"Fingerprint: %s", fpr)
1159
1160
try:
1161
client = ProxyClient(child_pipe, fpr,
1162
self.client_address)
1163
except KeyError:
1164
return
1165
1166
if client.approved_delay:
1167
delay = client.approved_delay
1168
client.approvals_pending += 1
1169
approval_required = True
1170
1171
while True:
1172
if not client.enabled:
1173
logger.warning(u"Client %s is disabled",
1174
client.name)
1175
if self.server.use_dbus:
1176
# Emit D-Bus signal
1177
client.Rejected("Disabled")
1178
return
1179
1180
if client._approved or not client.approved_delay:
1181
#We are approved or approval is disabled
1182
break
1183
elif client._approved is None:
1184
logger.info(u"Client %s need approval",
1185
client.name)
1186
if self.server.use_dbus:
1187
# Emit D-Bus signal
1188
client.NeedApproval(
1189
client.approved_delay_milliseconds(),
1190
client.approved_by_default)
1191
else:
1192
logger.warning(u"Client %s was not approved",
1193
client.name)
1194
if self.server.use_dbus:
1195
# Emit D-Bus signal
1196
client.Rejected("Disapproved")
1197
return
1198
1199
#wait until timeout or approved
1200
#x = float(client._timedelta_to_milliseconds(delay))
1201
time = datetime.datetime.now()
1202
client.changedstate.acquire()
1203
client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))
1204
client.changedstate.release()
1205
time2 = datetime.datetime.now()
1206
if (time2 - time) >= delay:
1207
if not client.approved_by_default:
1208
logger.warning("Client %s timed out while"
1209
" waiting for approval",
1210
client.name)
1211
if self.server.use_dbus:
1212
# Emit D-Bus signal
1213
client.Rejected("Time out")
1214
return
1215
else:
1216
break
1217
else:
1218
delay -= time2 - time
1219
1220
sent_size = 0
1221
while sent_size < len(client.secret):
1222
# XXX handle session exception
1223
sent = session.send(client.secret[sent_size:])
1224
logger.debug(u"Sent: %d, remaining: %d",
1225
sent, len(client.secret)
1226
- (sent_size + sent))
1227
sent_size += sent
1228
1229
logger.info(u"Sending secret to %s", client.name)
1230
# bump the timeout as if seen
1231
client.checked_ok()
1232
if self.server.use_dbus:
1233
# Emit D-Bus signal
1234
client.GotSecret()
1235
1236
finally:
1237
if approval_required:
1238
client.approvals_pending -= 1
1239
session.bye()
1240
1241
@staticmethod
1242
def peer_certificate(session):
1243
"Return the peer's OpenPGP certificate as a bytestring"
1244
# If not an OpenPGP certificate...
1245
if (gnutls.library.functions
1246
.gnutls_certificate_type_get(session._c_object)
1247
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1248
# ...do the normal thing
1249
return session.peer_certificate
1250
list_size = ctypes.c_uint(1)
1251
cert_list = (gnutls.library.functions
1252
.gnutls_certificate_get_peers
1253
(session._c_object, ctypes.byref(list_size)))
1254
if not bool(cert_list) and list_size.value != 0:
1255
raise gnutls.errors.GNUTLSError(u"error getting peer"
1256
u" certificate")
1257
if list_size.value == 0:
1258
return None
1259
cert = cert_list[0]
1260
return ctypes.string_at(cert.data, cert.size)
1261
1262
@staticmethod
1263
def fingerprint(openpgp):
1264
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1265
# New GnuTLS "datum" with the OpenPGP public key
1266
datum = (gnutls.library.types
1267
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1268
ctypes.POINTER
1269
(ctypes.c_ubyte)),
1270
ctypes.c_uint(len(openpgp))))
1271
# New empty GnuTLS certificate
1272
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1273
(gnutls.library.functions
1274
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1275
# Import the OpenPGP public key into the certificate
1276
(gnutls.library.functions
1277
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1278
gnutls.library.constants
1279
.GNUTLS_OPENPGP_FMT_RAW))
1280
# Verify the self signature in the key
1281
crtverify = ctypes.c_uint()
1282
(gnutls.library.functions
1283
.gnutls_openpgp_crt_verify_self(crt, 0,
1284
ctypes.byref(crtverify)))
1285
if crtverify.value != 0:
1286
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1287
raise (gnutls.errors.CertificateSecurityError
1288
(u"Verify failed"))
1289
# New buffer for the fingerprint
1290
buf = ctypes.create_string_buffer(20)
1291
buf_len = ctypes.c_size_t()
1292
# Get the fingerprint from the certificate into the buffer
1293
(gnutls.library.functions
1294
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1295
ctypes.byref(buf_len)))
1296
# Deinit the certificate
1297
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1298
# Convert the buffer to a Python bytestring
1299
fpr = ctypes.string_at(buf, buf_len.value)
1300
# Convert the bytestring to hexadecimal notation
1301
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
1302
return hex_fpr
1303
1304
1305
class MultiprocessingMixIn(object):
1306
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1307
def sub_process_main(self, request, address):
1308
try:
1309
self.finish_request(request, address)
1310
except:
1311
self.handle_error(request, address)
1312
self.close_request(request)
1313
1314
def process_request(self, request, address):
1315
"""Start a new process to process the request."""
1316
multiprocessing.Process(target = self.sub_process_main,
1317
args = (request, address)).start()
1318
1319
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1320
""" adds a pipe to the MixIn """
1321
def process_request(self, request, client_address):
1322
"""Overrides and wraps the original process_request().
1323
1324
This function creates a new pipe in self.pipe
1325
"""
1326
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1327
1328
super(MultiprocessingMixInWithPipe,
1329
self).process_request(request, client_address)
1330
self.add_pipe(parent_pipe)
1331
def add_pipe(self, parent_pipe):
1332
"""Dummy function; override as necessary"""
1333
pass
1334
1335
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1336
socketserver.TCPServer, object):
1337
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1338
449
logger.info(u"TCP connection from: %s",
450
unicode(self.client_address))
451
session = gnutls.connection.ClientSession\
452
(self.request, gnutls.connection.X509Credentials())
453
454
line = self.request.makefile().readline()
455
logger.debug(u"Protocol version: %r", line)
456
try:
457
if int(line.strip().split()[0]) > 1:
458
raise RuntimeError
459
except (ValueError, IndexError, RuntimeError), error:
460
logger.error(u"Unknown protocol version: %s", error)
461
return
462
463
# Note: gnutls.connection.X509Credentials is really a generic
464
# GnuTLS certificate credentials object so long as no X.509
465
# keys are added to it. Therefore, we can use it here despite
466
# using OpenPGP certificates.
467
468
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
469
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
470
# "+DHE-DSS"))
471
priority = "NORMAL" # Fallback default, since this
472
# MUST be set.
473
if self.server.settings["priority"]:
474
priority = self.server.settings["priority"]
475
gnutls.library.functions.gnutls_priority_set_direct\
476
(session._c_object, priority, None)
477
478
try:
479
session.handshake()
480
except gnutls.errors.GNUTLSError, error:
481
logger.warning(u"Handshake failed: %s", error)
482
# Do not run session.bye() here: the session is not
483
# established. Just abandon the request.
484
return
485
try:
486
fpr = fingerprint(peer_certificate(session))
487
except (TypeError, gnutls.errors.GNUTLSError), error:
488
logger.warning(u"Bad certificate: %s", error)
489
session.bye()
490
return
491
logger.debug(u"Fingerprint: %s", fpr)
492
client = None
493
for c in self.server.clients:
494
if c.fingerprint == fpr:
495
client = c
496
break
497
if not client:
498
logger.warning(u"Client not found for fingerprint: %s",
499
fpr)
500
session.bye()
501
return
502
# Have to check if client.still_valid(), since it is possible
503
# that the client timed out while establishing the GnuTLS
504
# session.
505
if not client.still_valid():
506
logger.warning(u"Client %(name)s is invalid",
507
vars(client))
508
session.bye()
509
return
510
sent_size = 0
511
while sent_size < len(client.secret):
512
sent = session.send(client.secret[sent_size:])
513
logger.debug(u"Sent: %d, remaining: %d",
514
sent, len(client.secret)
515
- (sent_size + sent))
516
sent_size += sent
517
session.bye()
518
519
520
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
521
"""IPv6 TCP server. Accepts 'None' as address and/or port.
1339
522
Attributes:
523
settings: Server settings
524
clients: Set() of Client objects
1340
525
enabled: Boolean; whether this server is activated yet
1341
interface: None or a network interface name (string)
1342
use_ipv6: Boolean; to use IPv6 or not
1343
526
"""
1344
def __init__(self, server_address, RequestHandlerClass,
1345
interface=None, use_ipv6=True):
1346
self.interface = interface
1347
if use_ipv6:
1348
self.address_family = socket.AF_INET6
1349
socketserver.TCPServer.__init__(self, server_address,
1350
RequestHandlerClass)
527
address_family = socket.AF_INET6
528
def __init__(self, *args, **kwargs):
529
if "settings" in kwargs:
530
self.settings = kwargs["settings"]
531
del kwargs["settings"]
532
if "clients" in kwargs:
533
self.clients = kwargs["clients"]
534
del kwargs["clients"]
535
self.enabled = False
536
super(IPv6_TCPServer, self).__init__(*args, **kwargs)
1351
537
def server_bind(self):
1352
538
"""This overrides the normal server_bind() function
1353
539
to bind to an interface if one was specified, and also NOT to
1354
540
bind to an address or port if they were not specified."""
1355
if self.interface is not None:
1356
if SO_BINDTODEVICE is None:
1357
logger.error(u"SO_BINDTODEVICE does not exist;"
1358
u" cannot bind to interface %s",
1359
self.interface)
1360
else:
1361
try:
1362
self.socket.setsockopt(socket.SOL_SOCKET,
1363
SO_BINDTODEVICE,
1364
str(self.interface
1365
+ u'\0'))
1366
except socket.error, error:
1367
if error[0] == errno.EPERM:
1368
logger.error(u"No permission to"
1369
u" bind to interface %s",
1370
self.interface)
1371
elif error[0] == errno.ENOPROTOOPT:
1372
logger.error(u"SO_BINDTODEVICE not available;"
1373
u" cannot bind to interface %s",
1374
self.interface)
1375
else:
1376
raise
541
if self.settings["interface"]:
542
# 25 is from /usr/include/asm-i486/socket.h
543
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
544
try:
545
self.socket.setsockopt(socket.SOL_SOCKET,
546
SO_BINDTODEVICE,
547
self.settings["interface"])
548
except socket.error, error:
549
if error[0] == errno.EPERM:
550
logger.error(u"No permission to"
551
u" bind to interface %s",
552
self.settings["interface"])
553
else:
554
raise error
1377
555
# Only bind(2) the socket if we really need to.
1378
556
if self.server_address[0] or self.server_address[1]:
1379
557
if not self.server_address[0]:
1380
if self.address_family == socket.AF_INET6:
1381
any_address = u"::" # in6addr_any
1382
else:
1383
any_address = socket.INADDR_ANY
1384
self.server_address = (any_address,
558
in6addr_any = "::"
559
self.server_address = (in6addr_any,
1385
560
self.server_address[1])
1386
561
elif not self.server_address[1]:
1387
562
self.server_address = (self.server_address[0],
1388
563
0)
1389
# if self.interface:
564
# if self.settings["interface"]:
1390
565
# self.server_address = (self.server_address[0],
1391
566
# 0, # port
1392
567
# 0, # flowinfo
1393
568
# if_nametoindex
1394
# (self.interface))
1395
return socketserver.TCPServer.server_bind(self)
1396
1397
1398
class MandosServer(IPv6_TCPServer):
1399
"""Mandos server.
1400
1401
Attributes:
1402
clients: set of Client objects
1403
gnutls_priority GnuTLS priority string
1404
use_dbus: Boolean; to emit D-Bus signals or not
1405
1406
Assumes a gobject.MainLoop event loop.
1407
"""
1408
def __init__(self, server_address, RequestHandlerClass,
1409
interface=None, use_ipv6=True, clients=None,
1410
gnutls_priority=None, use_dbus=True):
1411
self.enabled = False
1412
self.clients = clients
1413
if self.clients is None:
1414
self.clients = set()
1415
self.use_dbus = use_dbus
1416
self.gnutls_priority = gnutls_priority
1417
IPv6_TCPServer.__init__(self, server_address,
1418
RequestHandlerClass,
1419
interface = interface,
1420
use_ipv6 = use_ipv6)
569
# (self.settings
570
# ["interface"]))
571
return super(IPv6_TCPServer, self).server_bind()
1421
572
def server_activate(self):
1422
573
if self.enabled:
1423
return socketserver.TCPServer.server_activate(self)
574
return super(IPv6_TCPServer, self).server_activate()
1424
575
def enable(self):
1425
576
self.enabled = True
1426
def add_pipe(self, parent_pipe):
1427
# Call "handle_ipc" for both data and EOF events
1428
gobject.io_add_watch(parent_pipe.fileno(),
1429
gobject.IO_IN | gobject.IO_HUP,
1430
functools.partial(self.handle_ipc,
1431
parent_pipe = parent_pipe))
1432
1433
def handle_ipc(self, source, condition, parent_pipe=None,
1434
client_object=None):
1435
condition_names = {
1436
gobject.IO_IN: u"IN", # There is data to read.
1437
gobject.IO_OUT: u"OUT", # Data can be written (without
1438
# blocking).
1439
gobject.IO_PRI: u"PRI", # There is urgent data to read.
1440
gobject.IO_ERR: u"ERR", # Error condition.
1441
gobject.IO_HUP: u"HUP" # Hung up (the connection has been
1442
# broken, usually for pipes and
1443
# sockets).
1444
}
1445
conditions_string = ' | '.join(name
1446
for cond, name in
1447
condition_names.iteritems()
1448
if cond & condition)
1449
logger.debug(u"Handling IPC: FD = %d, condition = %s", source,
1450
conditions_string)
1451
1452
# Read a request from the child
1453
request = parent_pipe.recv()
1454
command = request[0]
1455
1456
if command == 'init':
1457
fpr = request[1]
1458
address = request[2]
1459
1460
for c in self.clients:
1461
if c.fingerprint == fpr:
1462
client = c
1463
break
1464
else:
1465
logger.warning(u"Client not found for fingerprint: %s, ad"
1466
u"dress: %s", fpr, address)
1467
if self.use_dbus:
1468
# Emit D-Bus signal
1469
mandos_dbus_service.ClientNotFound(fpr, address)
1470
parent_pipe.send(False)
1471
return False
1472
1473
gobject.io_add_watch(parent_pipe.fileno(),
1474
gobject.IO_IN | gobject.IO_HUP,
1475
functools.partial(self.handle_ipc,
1476
parent_pipe = parent_pipe,
1477
client_object = client))
1478
parent_pipe.send(True)
1479
# remove the old hook in favor of the new above hook on same fileno
1480
return False
1481
if command == 'funcall':
1482
funcname = request[1]
1483
args = request[2]
1484
kwargs = request[3]
1485
1486
parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))
1487
1488
if command == 'getattr':
1489
attrname = request[1]
1490
if callable(client_object.__getattribute__(attrname)):
1491
parent_pipe.send(('function',))
1492
else:
1493
parent_pipe.send(('data', client_object.__getattribute__(attrname)))
1494
1495
if command == 'setattr':
1496
attrname = request[1]
1497
value = request[2]
1498
setattr(client_object, attrname, value)
1499
1500
return True
1501
577
1502
578
1503
579
def string_to_delta(interval):
1504
580
"""Parse a string and return a datetime.timedelta
1505
1506
>>> string_to_delta(u'7d')
581
582
>>> string_to_delta('7d')
1507
583
datetime.timedelta(7)
1508
>>> string_to_delta(u'60s')
584
>>> string_to_delta('60s')
1509
585
datetime.timedelta(0, 60)
1510
>>> string_to_delta(u'60m')
586
>>> string_to_delta('60m')
1511
587
datetime.timedelta(0, 3600)
1512
>>> string_to_delta(u'24h')
588
>>> string_to_delta('24h')
1513
589
datetime.timedelta(1)
1514
590
>>> string_to_delta(u'1w')
1515
591
datetime.timedelta(7)
1516
>>> string_to_delta(u'5m 30s')
592
>>> string_to_delta('5m 30s')
1517
593
datetime.timedelta(0, 330)
1518
594
"""
1519
595
timevalue = datetime.timedelta(0)
1532
608
elif suffix == u"w":
1533
609
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1534
610
else:
1535
raise ValueError(u"Unknown suffix %r" % suffix)
1536
except (ValueError, IndexError), e:
1537
raise ValueError(e.message)
611
raise ValueError
612
except (ValueError, IndexError):
613
raise ValueError
1538
614
timevalue += delta
1539
615
return timevalue
1540
616
1541
617
618
def server_state_changed(state):
619
"""Derived from the Avahi example code"""
620
if state == avahi.SERVER_COLLISION:
621
logger.error(u"Zeroconf server name collision")
622
service.remove()
623
elif state == avahi.SERVER_RUNNING:
624
service.add()
625
626
627
def entry_group_state_changed(state, error):
628
"""Derived from the Avahi example code"""
629
logger.debug(u"Avahi state change: %i", state)
630
631
if state == avahi.ENTRY_GROUP_ESTABLISHED:
632
logger.debug(u"Zeroconf service established.")
633
elif state == avahi.ENTRY_GROUP_COLLISION:
634
logger.warning(u"Zeroconf service name collision.")
635
service.rename()
636
elif state == avahi.ENTRY_GROUP_FAILURE:
637
logger.critical(u"Avahi: Error in group state changed %s",
638
unicode(error))
639
raise AvahiGroupError("State changed: %s", str(error))
640
1542
641
def if_nametoindex(interface):
1543
"""Call the C function if_nametoindex(), or equivalent
1544
1545
Note: This function cannot accept a unicode string."""
642
"""Call the C function if_nametoindex(), or equivalent"""
1546
643
global if_nametoindex
1547
644
try:
1548
if_nametoindex = (ctypes.cdll.LoadLibrary
1549
(ctypes.util.find_library(u"c"))
1550
.if_nametoindex)
645
if_nametoindex = ctypes.cdll.LoadLibrary\
646
(ctypes.util.find_library("c")).if_nametoindex
1551
647
except (OSError, AttributeError):
1552
logger.warning(u"Doing if_nametoindex the hard way")
648
if "struct" not in sys.modules:
649
import struct
650
if "fcntl" not in sys.modules:
651
import fcntl
1553
652
def if_nametoindex(interface):
1554
653
"Get an interface index the hard way, i.e. using fcntl()"
1555
654
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1556
with contextlib.closing(socket.socket()) as s:
1557
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1558
struct.pack(str(u"16s16x"),
1559
interface))
1560
interface_index = struct.unpack(str(u"I"),
1561
ifreq[16:20])[0]
655
s = socket.socket()
656
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
657
struct.pack("16s16x", interface))
658
s.close()
659
interface_index = struct.unpack("I", ifreq[16:20])[0]
1562
660
return interface_index
1563
661
return if_nametoindex(interface)
1564
662
1565
663
1566
664
def daemon(nochdir = False, noclose = False):
1567
665
"""See daemon(3). Standard BSD Unix function.
1568
1569
666
This should really exist as os.daemon, but it doesn't (yet)."""
1570
667
if os.fork():
1571
668
sys.exit()
1572
669
os.setsid()
1573
670
if not nochdir:
1574
os.chdir(u"/")
671
os.chdir("/")
1575
672
if os.fork():
1576
673
sys.exit()
1577
674
if not noclose:
1579
676
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1580
677
if not stat.S_ISCHR(os.fstat(null).st_mode):
1581
678
raise OSError(errno.ENODEV,
1582
u"%s not a character device"
1583
% os.path.devnull)
679
"/dev/null not a character device")
1584
680
os.dup2(null, sys.stdin.fileno())
1585
681
os.dup2(null, sys.stdout.fileno())
1586
682
os.dup2(null, sys.stderr.fileno())
1589
685
1590
686
1591
687
def main():
1592
1593
##################################################################
1594
# Parsing of options, both command line and config file
1595
1596
parser = optparse.OptionParser(version = "%%prog %s" % version)
1597
parser.add_option("-i", u"--interface", type=u"string",
1598
metavar="IF", help=u"Bind to interface IF")
1599
parser.add_option("-a", u"--address", type=u"string",
1600
help=u"Address to listen for requests on")
1601
parser.add_option("-p", u"--port", type=u"int",
1602
help=u"Port number to receive requests on")
1603
parser.add_option("--check", action=u"store_true",
1604
help=u"Run self-test")
1605
parser.add_option("--debug", action=u"store_true",
1606
help=u"Debug mode; run in foreground and log to"
1607
u" terminal")
1608
parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1609
u" priority string (see GnuTLS documentation)")
1610
parser.add_option("--servicename", type=u"string",
1611
metavar=u"NAME", help=u"Zeroconf service name")
1612
parser.add_option("--configdir", type=u"string",
1613
default=u"/etc/mandos", metavar=u"DIR",
1614
help=u"Directory to search for configuration"
1615
u" files")
1616
parser.add_option("--no-dbus", action=u"store_false",
1617
dest=u"use_dbus", help=u"Do not provide D-Bus"
1618
u" system bus interface")
1619
parser.add_option("--no-ipv6", action=u"store_false",
1620
dest=u"use_ipv6", help=u"Do not use IPv6")
688
parser = OptionParser(version = "%%prog %s" % version)
689
parser.add_option("-i", "--interface", type="string",
690
metavar="IF", help="Bind to interface IF")
691
parser.add_option("-a", "--address", type="string",
692
help="Address to listen for requests on")
693
parser.add_option("-p", "--port", type="int",
694
help="Port number to receive requests on")
695
parser.add_option("--check", action="store_true", default=False,
696
help="Run self-test")
697
parser.add_option("--debug", action="store_true",
698
help="Debug mode; run in foreground and log to"
699
" terminal")
700
parser.add_option("--priority", type="string", help="GnuTLS"
701
" priority string (see GnuTLS documentation)")
702
parser.add_option("--servicename", type="string", metavar="NAME",
703
help="Zeroconf service name")
704
parser.add_option("--configdir", type="string",
705
default="/etc/mandos", metavar="DIR",
706
help="Directory to search for configuration"
707
" files")
1621
708
options = parser.parse_args()[0]
1622
709
1623
710
if options.check:
1626
713
sys.exit()
1627
714
1628
715
# Default values for config file for server-global settings
1629
server_defaults = { u"interface": u"",
1630
u"address": u"",
1631
u"port": u"",
1632
u"debug": u"False",
1633
u"priority":
1634
u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1635
u"servicename": u"Mandos",
1636
u"use_dbus": u"True",
1637
u"use_ipv6": u"True",
716
server_defaults = { "interface": "",
717
"address": "",
718
"port": "",
719
"debug": "False",
720
"priority":
721
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
722
"servicename": "Mandos",
1638
723
}
1639
724
1640
725
# Parse config file for server-global settings
1641
server_config = configparser.SafeConfigParser(server_defaults)
726
server_config = ConfigParser.SafeConfigParser(server_defaults)
1642
727
del server_defaults
1643
server_config.read(os.path.join(options.configdir,
1644
u"mandos.conf"))
728
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1645
729
# Convert the SafeConfigParser object to a dict
1646
730
server_settings = server_config.defaults()
1647
# Use the appropriate methods on the non-string config options
1648
for option in (u"debug", u"use_dbus", u"use_ipv6"):
1649
server_settings[option] = server_config.getboolean(u"DEFAULT",
1650
option)
1651
if server_settings["port"]:
1652
server_settings["port"] = server_config.getint(u"DEFAULT",
1653
u"port")
731
# Use getboolean on the boolean config option
732
server_settings["debug"] = server_config.getboolean\
733
("DEFAULT", "debug")
1654
734
del server_config
1655
735
1656
736
# Override the settings from the config file with command line
1657
737
# options, if set.
1658
for option in (u"interface", u"address", u"port", u"debug",
1659
u"priority", u"servicename", u"configdir",
1660
u"use_dbus", u"use_ipv6"):
738
for option in ("interface", "address", "port", "debug",
739
"priority", "servicename", "configdir"):
1661
740
value = getattr(options, option)
1662
741
if value is not None:
1663
742
server_settings[option] = value
1664
743
del options
1665
# Force all strings to be unicode
1666
for option in server_settings.keys():
1667
if type(server_settings[option]) is str:
1668
server_settings[option] = unicode(server_settings[option])
1669
744
# Now we have our good server settings in "server_settings"
1670
745
1671
##################################################################
1672
1673
# For convenience
1674
debug = server_settings[u"debug"]
1675
use_dbus = server_settings[u"use_dbus"]
1676
use_ipv6 = server_settings[u"use_ipv6"]
746
debug = server_settings["debug"]
1677
747
1678
748
if not debug:
1679
749
syslogger.setLevel(logging.WARNING)
1680
750
console.setLevel(logging.WARNING)
1681
751
1682
if server_settings[u"servicename"] != u"Mandos":
1683
syslogger.setFormatter(logging.Formatter
1684
(u'Mandos (%s) [%%(process)d]:'
1685
u' %%(levelname)s: %%(message)s'
1686
% server_settings[u"servicename"]))
752
if server_settings["servicename"] != "Mandos":
753
syslogger.setFormatter(logging.Formatter\
754
('Mandos (%s): %%(levelname)s:'
755
' %%(message)s'
756
% server_settings["servicename"]))
1687
757
1688
758
# Parse config file with clients
1689
client_defaults = { u"timeout": u"1h",
1690
u"interval": u"5m",
1691
u"checker": u"fping -q -- %%(host)s",
1692
u"host": u"",
1693
u"approved_delay": u"0s",
1694
u"approved_duration": u"1s",
759
client_defaults = { "timeout": "1h",
760
"interval": "5m",
761
"checker": "fping -q -- %(host)s",
762
"host": "",
1695
763
}
1696
client_config = configparser.SafeConfigParser(client_defaults)
1697
client_config.read(os.path.join(server_settings[u"configdir"],
1698
u"clients.conf"))
1699
1700
global mandos_dbus_service
1701
mandos_dbus_service = None
1702
1703
tcp_server = MandosServer((server_settings[u"address"],
1704
server_settings[u"port"]),
1705
ClientHandler,
1706
interface=server_settings[u"interface"],
1707
use_ipv6=use_ipv6,
1708
gnutls_priority=
1709
server_settings[u"priority"],
1710
use_dbus=use_dbus)
1711
pidfilename = u"/var/run/mandos.pid"
1712
try:
1713
pidfile = open(pidfilename, u"w")
1714
except IOError:
1715
logger.error(u"Could not open file %r", pidfilename)
1716
1717
try:
1718
uid = pwd.getpwnam(u"_mandos").pw_uid
1719
gid = pwd.getpwnam(u"_mandos").pw_gid
1720
except KeyError:
1721
try:
1722
uid = pwd.getpwnam(u"mandos").pw_uid
1723
gid = pwd.getpwnam(u"mandos").pw_gid
1724
except KeyError:
1725
try:
1726
uid = pwd.getpwnam(u"nobody").pw_uid
1727
gid = pwd.getpwnam(u"nobody").pw_gid
1728
except KeyError:
1729
uid = 65534
1730
gid = 65534
1731
try:
764
client_config = ConfigParser.SafeConfigParser(client_defaults)
765
client_config.read(os.path.join(server_settings["configdir"],
766
"clients.conf"))
767
768
clients = Set()
769
tcp_server = IPv6_TCPServer((server_settings["address"],
770
server_settings["port"]),
771
TCP_handler,
772
settings=server_settings,
773
clients=clients)
774
pidfilename = "/var/run/mandos.pid"
775
try:
776
pidfile = open(pidfilename, "w")
777
except IOError, error:
778
logger.error("Could not open file %r", pidfilename)
779
780
uid = 65534
781
gid = 65534
782
try:
783
uid = pwd.getpwnam("mandos").pw_uid
784
except KeyError:
785
try:
786
uid = pwd.getpwnam("nobody").pw_uid
787
except KeyError:
788
pass
789
try:
790
gid = pwd.getpwnam("mandos").pw_gid
791
except KeyError:
792
try:
793
gid = pwd.getpwnam("nogroup").pw_gid
794
except KeyError:
795
pass
796
try:
797
os.setuid(uid)
1732
798
os.setgid(gid)
1733
os.setuid(uid)
1734
799
except OSError, error:
1735
800
if error[0] != errno.EPERM:
1736
801
raise error
1737
802
1738
# Enable all possible GnuTLS debugging
1739
if debug:
1740
# "Use a log level over 10 to enable all debugging options."
1741
# - GnuTLS manual
1742
gnutls.library.functions.gnutls_global_set_log_level(11)
1743
1744
@gnutls.library.types.gnutls_log_func
1745
def debug_gnutls(level, string):
1746
logger.debug(u"GnuTLS: %s", string[:-1])
1747
1748
(gnutls.library.functions
1749
.gnutls_global_set_log_function(debug_gnutls))
803
global service
804
service = AvahiService(name = server_settings["servicename"],
805
servicetype = "_mandos._tcp", )
806
if server_settings["interface"]:
807
service.interface = if_nametoindex\
808
(server_settings["interface"])
1750
809
1751
810
global main_loop
811
global bus
812
global server
1752
813
# From the Avahi example code
1753
814
DBusGMainLoop(set_as_default=True )
1754
815
main_loop = gobject.MainLoop()
1755
816
bus = dbus.SystemBus()
817
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
818
avahi.DBUS_PATH_SERVER),
819
avahi.DBUS_INTERFACE_SERVER)
1756
820
# End of Avahi example code
1757
if use_dbus:
1758
try:
1759
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos",
1760
bus, do_not_queue=True)
1761
except dbus.exceptions.NameExistsException, e:
1762
logger.error(unicode(e) + u", disabling D-Bus")
1763
use_dbus = False
1764
server_settings[u"use_dbus"] = False
1765
tcp_server.use_dbus = False
1766
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1767
service = AvahiService(name = server_settings[u"servicename"],
1768
servicetype = u"_mandos._tcp",
1769
protocol = protocol, bus = bus)
1770
if server_settings["interface"]:
1771
service.interface = (if_nametoindex
1772
(str(server_settings[u"interface"])))
1773
1774
client_class = Client
1775
if use_dbus:
1776
client_class = functools.partial(ClientDBus, bus = bus)
1777
def client_config_items(config, section):
1778
special_settings = {
1779
"approved_by_default":
1780
lambda: config.getboolean(section,
1781
"approved_by_default"),
1782
}
1783
for name, value in config.items(section):
1784
try:
1785
yield (name, special_settings[name]())
1786
except KeyError:
1787
yield (name, value)
1788
1789
tcp_server.clients.update(set(
1790
client_class(name = section,
1791
config= dict(client_config_items(
1792
client_config, section)))
1793
for section in client_config.sections()))
1794
if not tcp_server.clients:
1795
logger.warning(u"No clients defined")
821
822
def remove_from_clients(client):
823
clients.remove(client)
824
if not clients:
825
logger.critical(u"No clients left, exiting")
826
sys.exit()
827
828
clients.update(Set(Client(name = section,
829
stop_hook = remove_from_clients,
830
config
831
= dict(client_config.items(section)))
832
for section in client_config.sections()))
833
if not clients:
834
logger.critical(u"No clients defined")
835
sys.exit(1)
1796
836
1797
837
if debug:
1798
838
# Redirect stdin so all checkers get /dev/null
1807
847
daemon()
1808
848
1809
849
try:
1810
with pidfile:
1811
pid = os.getpid()
1812
pidfile.write(str(pid) + "\n")
850
pid = os.getpid()
851
pidfile.write(str(pid) + "\n")
852
pidfile.close()
1813
853
del pidfile
1814
854
except IOError:
1815
855
logger.error(u"Could not write to file %r with PID %d",
1819
859
pass
1820
860
del pidfilename
1821
861
862
def cleanup():
863
"Cleanup function; run on exit"
864
global group
865
# From the Avahi example code
866
if not group is None:
867
group.Free()
868
group = None
869
# End of Avahi example code
870
871
while clients:
872
client = clients.pop()
873
client.stop_hook = None
874
client.stop()
875
876
atexit.register(cleanup)
877
1822
878
if not debug:
1823
879
signal.signal(signal.SIGINT, signal.SIG_IGN)
1824
880
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1825
881
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1826
882
1827
if use_dbus:
1828
class MandosDBusService(dbus.service.Object):
1829
"""A D-Bus proxy object"""
1830
def __init__(self):
1831
dbus.service.Object.__init__(self, bus, u"/")
1832
_interface = u"se.bsnet.fukt.Mandos"
1833
1834
@dbus.service.signal(_interface, signature=u"o")
1835
def ClientAdded(self, objpath):
1836
"D-Bus signal"
1837
pass
1838
1839
@dbus.service.signal(_interface, signature=u"ss")
1840
def ClientNotFound(self, fingerprint, address):
1841
"D-Bus signal"
1842
pass
1843
1844
@dbus.service.signal(_interface, signature=u"os")
1845
def ClientRemoved(self, objpath, name):
1846
"D-Bus signal"
1847
pass
1848
1849
@dbus.service.method(_interface, out_signature=u"ao")
1850
def GetAllClients(self):
1851
"D-Bus method"
1852
return dbus.Array(c.dbus_object_path
1853
for c in tcp_server.clients)
1854
1855
@dbus.service.method(_interface,
1856
out_signature=u"a{oa{sv}}")
1857
def GetAllClientsWithProperties(self):
1858
"D-Bus method"
1859
return dbus.Dictionary(
1860
((c.dbus_object_path, c.GetAll(u""))
1861
for c in tcp_server.clients),
1862
signature=u"oa{sv}")
1863
1864
@dbus.service.method(_interface, in_signature=u"o")
1865
def RemoveClient(self, object_path):
1866
"D-Bus method"
1867
for c in tcp_server.clients:
1868
if c.dbus_object_path == object_path:
1869
tcp_server.clients.remove(c)
1870
c.remove_from_connection()
1871
# Don't signal anything except ClientRemoved
1872
c.disable(quiet=True)
1873
# Emit D-Bus signal
1874
self.ClientRemoved(object_path, c.name)
1875
return
1876
raise KeyError(object_path)
1877
1878
del _interface
1879
1880
mandos_dbus_service = MandosDBusService()
1881
1882
def cleanup():
1883
"Cleanup function; run on exit"
1884
service.cleanup()
1885
1886
while tcp_server.clients:
1887
client = tcp_server.clients.pop()
1888
if use_dbus:
1889
client.remove_from_connection()
1890
client.disable_hook = None
1891
# Don't signal anything except ClientRemoved
1892
client.disable(quiet=True)
1893
if use_dbus:
1894
# Emit D-Bus signal
1895
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
1896
client.name)
1897
1898
atexit.register(cleanup)
1899
1900
for client in tcp_server.clients:
1901
if use_dbus:
1902
# Emit D-Bus signal
1903
mandos_dbus_service.ClientAdded(client.dbus_object_path)
1904
client.enable()
883
for client in clients:
884
client.start()
1905
885
1906
886
tcp_server.enable()
1907
887
tcp_server.server_activate()
1908
888
1909
889
# Find out what port we got
1910
890
service.port = tcp_server.socket.getsockname()[1]
1911
if use_ipv6:
1912
logger.info(u"Now listening on address %r, port %d,"
1913
" flowinfo %d, scope_id %d"
1914
% tcp_server.socket.getsockname())
1915
else: # IPv4
1916
logger.info(u"Now listening on address %r, port %d"
1917
% tcp_server.socket.getsockname())
891
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
892
u" scope_id %d" % tcp_server.socket.getsockname())
1918
893
1919
894
#service.interface = tcp_server.socket.getsockname()[3]
1920
895
1921
896
try:
1922
897
# From the Avahi example code
898
server.connect_to_signal("StateChanged", server_state_changed)
1923
899
try:
1924
service.activate()
900
server_state_changed(server.GetState())
1925
901
except dbus.exceptions.DBusException, error:
1926
902
logger.critical(u"DBusException: %s", error)
1927
cleanup()
1928
903
sys.exit(1)
1929
904
# End of Avahi example code
1930
905
1931
906
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
1932
907
lambda *args, **kwargs:
1933
(tcp_server.handle_request
1934
(*args[2:], **kwargs) or True))
908
tcp_server.handle_request\
909
(*args[2:], **kwargs) or True)
1935
910
1936
911
logger.debug(u"Starting main loop")
1937
912
main_loop.run()
1938
913
except AvahiError, error:
1939
logger.critical(u"AvahiError: %s", error)
1940
cleanup()
914
logger.critical(u"AvahiError: %s" + unicode(error))
1941
915
sys.exit(1)
1942
916
except KeyboardInterrupt:
1943
917
if debug:
1944
print >> sys.stderr
1945
logger.debug(u"Server received KeyboardInterrupt")
1946
logger.debug(u"Server exiting")
1947
# Must run before the D-Bus bus name gets deregistered
1948
cleanup()
918
print
1949
919
1950
920
if __name__ == '__main__':
1951
921
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0