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- Committer: Teddy Hogeborn
- Date: 2008-08-16 03:29:08 UTC
- Revision ID: teddy@fukt.bsnet.se-20080816032908-ihw7c05r2mnyk389
Add feature to specify custom environment variables for plugins.
* plugin-runner.c (plugin): New members "environ" and "envc" to
contain possible custom environment.
(getplugin): Return NULL on failure instead of doing exit(); all
callers changed.
(add_to_char_array): New helper function for "add_argument" and
"add_environment".
(addargument): Renamed to "add_argument". Return bool. Call
"add_to_char_array" to actually do things.
(add_environment): New; analogous to "add_argument".
(addcustomargument): Renamed to "add_to_argv" to avoid confusion
with "add_argument".
(main): New options "--global-envs" and "--envs-for" to specify
custom environment for plugins. Print environment for
plugins in debug mode. Use asprintf instead of strcpy and
strcat. Use execve() for plugins with custom environments.
Free environment for plugin when freeing plugin list.
* plugin-runner.c (plugin): New members "environ" and "envc" to
contain possible custom environment.
(getplugin): Return NULL on failure instead of doing exit(); all
callers changed.
(add_to_char_array): New helper function for "add_argument" and
"add_environment".
(addargument): Renamed to "add_argument". Return bool. Call
"add_to_char_array" to actually do things.
(add_environment): New; analogous to "add_argument".
(addcustomargument): Renamed to "add_to_argv" to avoid confusion
with "add_argument".
(main): New options "--global-envs" and "--envs-for" to specify
custom environment for plugins. Print environment for
plugins in debug mode. Use asprintf instead of strcpy and
strcat. Use execve() for plugins with custom environments.
Free environment for plugin when freeing plugin list.
- files added:
- network-protocol.txt
- files removed:
- .bzr-builddeb
- debian
- debian/po
- files renamed:
- 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.getLogger(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
74
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
122
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
123
def rename(self):
155
124
"""Derived from the Avahi example code"""
156
125
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))
126
logger.critical(u"No suitable service name found after %i"
127
u" retries, exiting.", rename_count)
128
raise AvahiServiceError("Too many renames")
129
self.name = server.GetAlternativeServiceName(self.name)
130
logger.info(u"Changing name to %r ...", str(self.name))
131
syslogger.setFormatter(logging.Formatter\
132
('Mandos (%s): %%(levelname)s:'
133
' %%(message)s' % self.name))
168
134
self.remove()
169
135
self.add()
170
136
self.rename_count += 1
171
137
def remove(self):
172
138
"""Derived from the Avahi example code"""
173
if self.group is not None:
174
self.group.Reset()
139
if group is not None:
140
group.Reset()
175
141
def add(self):
176
142
"""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())
143
global group
144
if group is None:
145
group = dbus.Interface\
146
(bus.get_object(avahi.DBUS_NAME,
147
server.EntryGroupNew()),
148
avahi.DBUS_INTERFACE_ENTRY_GROUP)
149
group.connect_to_signal('StateChanged',
150
entry_group_state_changed)
151
logger.debug(u"Adding service '%s' of type '%s' ...",
152
service.name, service.type)
153
group.AddService(
154
self.interface, # interface
155
avahi.PROTO_INET6, # protocol
156
dbus.UInt32(0), # flags
157
self.name, self.type,
158
self.domain, self.host,
159
dbus.UInt16(self.port),
160
avahi.string_array_to_txt_array(self.TXT))
161
group.Commit()
162
163
# From the Avahi example code:
164
group = None # our entry group
165
# End of Avahi example code
232
166
233
167
234
168
class Client(object):
235
169
"""A representation of a client host served by this server.
236
237
170
Attributes:
238
name: string; from the config file, used in log messages and
239
D-Bus identifiers
171
name: string; from the config file, used in log messages
240
172
fingerprint: string (40 or 32 hexadecimal digits); used to
241
173
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.
174
secret: bytestring; sent verbatim (over TLS) to client
175
host: string; available for use by the checker command
176
created: datetime.datetime(); object creation, not client host
177
last_checked_ok: datetime.datetime() or None if not yet checked OK
178
timeout: datetime.timedelta(); How long from last_checked_ok
179
until this client is invalid
180
interval: datetime.timedelta(); How often to start a new checker
181
stop_hook: If set, called by stop() as stop_hook(self)
182
checker: subprocess.Popen(); a running checker process used
183
to see if the client lives.
184
'None' if no process is running.
255
185
checker_initiator_tag: a gobject event source tag, or None
256
disable_initiator_tag: - '' -
186
stop_initiator_tag: - '' -
257
187
checker_callback_tag: - '' -
258
188
checker_command: string; External command which is run to check if
259
189
client lives. %() expansions are done at
260
190
runtime with vars(self) as dict, so that for
261
191
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
192
Private attibutes:
193
_timeout: Real variable for 'timeout'
194
_interval: Real variable for 'interval'
195
_timeout_milliseconds: Used when calling gobject.timeout_add()
196
_interval_milliseconds: - '' -
266
197
"""
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):
198
def _set_timeout(self, timeout):
199
"Setter function for 'timeout' attribute"
200
self._timeout = timeout
201
self._timeout_milliseconds = ((self.timeout.days
202
* 24 * 60 * 60 * 1000)
203
+ (self.timeout.seconds * 1000)
204
+ (self.timeout.microseconds
205
// 1000))
206
timeout = property(lambda self: self._timeout,
207
_set_timeout)
208
del _set_timeout
209
def _set_interval(self, interval):
210
"Setter function for 'interval' attribute"
211
self._interval = interval
212
self._interval_milliseconds = ((self.interval.days
213
* 24 * 60 * 60 * 1000)
214
+ (self.interval.seconds
215
* 1000)
216
+ (self.interval.microseconds
217
// 1000))
218
interval = property(lambda self: self._interval,
219
_set_interval)
220
del _set_interval
221
def __init__(self, name = None, stop_hook=None, config={}):
287
222
"""Note: the 'checker' key in 'config' sets the
288
223
'checker_command' attribute and *not* the 'checker'
289
224
attribute."""
290
225
self.name = name
291
if config is None:
292
config = {}
293
226
logger.debug(u"Creating client %r", self.name)
294
227
# Uppercase and remove spaces from fingerprint for later
295
228
# comparison purposes with return value from the fingerprint()
296
229
# function
297
self.fingerprint = (config[u"fingerprint"].upper()
298
.replace(u" ", u""))
230
self.fingerprint = config["fingerprint"].upper()\
231
.replace(u" ", u"")
299
232
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()
233
if "secret" in config:
234
self.secret = config["secret"].decode(u"base64")
235
elif "secfile" in config:
236
sf = open(config["secfile"])
237
self.secret = sf.read()
238
sf.close()
307
239
else:
308
#XXX Need to allow secret on demand!
309
240
raise TypeError(u"No secret or secfile for client %s"
310
241
% 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
242
self.host = config.get("host", "")
243
self.created = datetime.datetime.now()
315
244
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
245
self.timeout = string_to_delta(config["timeout"])
246
self.interval = string_to_delta(config["interval"])
247
self.stop_hook = stop_hook
319
248
self.checker = None
320
249
self.checker_initiator_tag = None
321
self.disable_initiator_tag = None
250
self.stop_initiator_tag = None
322
251
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):
252
self.check_command = config["checker"]
253
def start(self):
342
254
"""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
255
# Schedule a new checker to be started an 'interval' from now,
349
256
# 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
257
self.checker_initiator_tag = gobject.timeout_add\
258
(self._interval_milliseconds,
259
self.start_checker)
358
260
# Also start a new checker *right now*.
359
261
self.start_checker()
360
361
def disable(self, quiet=True):
362
"""Disable this client."""
363
if not getattr(self, "enabled", False):
262
# Schedule a stop() when 'timeout' has passed
263
self.stop_initiator_tag = gobject.timeout_add\
264
(self._timeout_milliseconds,
265
self.stop)
266
def stop(self):
267
"""Stop this client.
268
The possibility that a client might be restarted is left open,
269
but not currently used."""
270
# If this client doesn't have a secret, it is already stopped.
271
if hasattr(self, "secret") and self.secret:
272
logger.info(u"Stopping client %s", self.name)
273
self.secret = None
274
else:
364
275
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):
276
if getattr(self, "stop_initiator_tag", False):
277
gobject.source_remove(self.stop_initiator_tag)
278
self.stop_initiator_tag = None
279
if getattr(self, "checker_initiator_tag", False):
373
280
gobject.source_remove(self.checker_initiator_tag)
374
281
self.checker_initiator_tag = None
375
282
self.stop_checker()
376
if self.disable_hook:
377
self.disable_hook(self)
378
self.enabled = False
283
if self.stop_hook:
284
self.stop_hook(self)
379
285
# Do not run this again if called by a gobject.timeout_add
380
286
return False
381
382
287
def __del__(self):
383
self.disable_hook = None
384
self.disable()
385
386
def checker_callback(self, pid, condition, command):
288
self.stop_hook = None
289
self.stop()
290
def checker_callback(self, pid, condition):
387
291
"""The checker has completed, so take appropriate actions."""
292
now = datetime.datetime.now()
388
293
self.checker_callback_tag = None
389
294
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:
295
if os.WIFEXITED(condition) \
296
and (os.WEXITSTATUS(condition) == 0):
297
logger.info(u"Checker for %(name)s succeeded",
298
vars(self))
299
self.last_checked_ok = now
300
gobject.source_remove(self.stop_initiator_tag)
301
self.stop_initiator_tag = gobject.timeout_add\
302
(self._timeout_milliseconds,
303
self.stop)
304
elif not os.WIFEXITED(condition):
400
305
logger.warning(u"Checker for %(name)s crashed?",
401
306
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
307
else:
308
logger.info(u"Checker for %(name)s failed",
309
vars(self))
415
310
def start_checker(self):
416
311
"""Start a new checker subprocess if one is not running.
417
418
312
If a checker already exists, leave it running and do
419
313
nothing."""
420
314
# The reason for not killing a running checker is that if we
423
317
# client would inevitably timeout, since no checker would get
424
318
# a chance to run to completion. If we instead leave running
425
319
# 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
320
# than 'timeout' for the client to be declared invalid, which
321
# is as it should be.
443
322
if self.checker is None:
444
323
try:
445
# In case checker_command has exactly one % operator
446
command = self.checker_command % self.host
324
# In case check_command has exactly one % operator
325
command = self.check_command % self.host
447
326
except TypeError:
448
327
# Escape attributes for the shell
449
escaped_attrs = dict((key,
450
re.escape(unicode(str(val),
451
errors=
452
u'replace')))
328
escaped_attrs = dict((key, re.escape(str(val)))
453
329
for key, val in
454
330
vars(self).iteritems())
455
331
try:
456
command = self.checker_command % escaped_attrs
332
command = self.check_command % escaped_attrs
457
333
except TypeError, error:
458
334
logger.error(u'Could not format string "%s":'
459
u' %s', self.checker_command, error)
335
u' %s', self.check_command, error)
460
336
return True # Try again later
461
self.current_checker_command = command
462
337
try:
463
338
logger.info(u"Starting checker %r for %s",
464
339
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
340
self.checker = subprocess.Popen(command,
470
341
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:
342
shell=True, cwd="/")
343
self.checker_callback_tag = gobject.child_watch_add\
344
(self.checker.pid,
345
self.checker_callback)
346
except subprocess.OSError, error:
483
347
logger.error(u"Failed to start subprocess: %s",
484
348
error)
485
349
# Re-run this periodically if run by gobject.timeout_add
486
350
return True
487
488
351
def stop_checker(self):
489
352
"""Force the checker process, if any, to stop."""
490
353
if self.checker_callback_tag:
491
354
gobject.source_remove(self.checker_callback_tag)
492
355
self.checker_callback_tag = None
493
if getattr(self, u"checker", None) is None:
356
if getattr(self, "checker", None) is None:
494
357
return
495
358
logger.debug(u"Stopping checker for %(name)s", vars(self))
496
359
try:
497
360
os.kill(self.checker.pid, signal.SIGTERM)
498
#time.sleep(0.5)
361
#os.sleep(0.5)
499
362
#if self.checker.poll() is None:
500
363
# os.kill(self.checker.pid, signal.SIGKILL)
501
364
except OSError, error:
502
365
if error.errno != errno.ESRCH: # No such process
503
366
raise
504
367
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._approvals_pending = 0
706
self.bus = bus
707
Client.__init__(self, *args, **kwargs)
708
# Only now, when this client is initialized, can it show up on
709
# the D-Bus
710
self.dbus_object_path = (dbus.ObjectPath
711
(u"/clients/"
712
+ self.name.replace(u".", u"_")))
713
DBusObjectWithProperties.__init__(self, self.bus,
714
self.dbus_object_path)
715
716
def _get_approvals_pending(self, value):
717
return self._approvals_pending
718
def _set_approvals_pending(self, value):
719
old_value = self._approvals_pending
720
self._approvals_pending = value
721
bval = bool(value)
722
if (hasattr(self, "dbus_object_path")
723
and bval is bool(old_value)):
724
dbus_bool = dbus.Boolean(bval, variant_level=1)
725
self.PropertyChanged(dbus.String(u"approved_pending"),
726
dbus_bool)
727
return value
728
approvals_pending = property(_get_approvals_pending,
729
_set_approvals_pending)
730
del _get_approvals_pending, _set_approvals_pending
731
732
@staticmethod
733
def _datetime_to_dbus(dt, variant_level=0):
734
"""Convert a UTC datetime.datetime() to a D-Bus type."""
735
return dbus.String(dt.isoformat(),
736
variant_level=variant_level)
737
738
def enable(self):
739
oldstate = getattr(self, u"enabled", False)
740
r = Client.enable(self)
741
if oldstate != self.enabled:
742
# Emit D-Bus signals
743
self.PropertyChanged(dbus.String(u"enabled"),
744
dbus.Boolean(True, variant_level=1))
745
self.PropertyChanged(
746
dbus.String(u"last_enabled"),
747
self._datetime_to_dbus(self.last_enabled,
748
variant_level=1))
749
return r
750
751
def disable(self, quiet = False):
752
oldstate = getattr(self, u"enabled", False)
753
r = Client.disable(self, quiet=quiet)
754
if not quiet and oldstate != self.enabled:
755
# Emit D-Bus signal
756
self.PropertyChanged(dbus.String(u"enabled"),
757
dbus.Boolean(False, variant_level=1))
758
return r
759
760
def __del__(self, *args, **kwargs):
761
try:
762
self.remove_from_connection()
763
except LookupError:
764
pass
765
if hasattr(DBusObjectWithProperties, u"__del__"):
766
DBusObjectWithProperties.__del__(self, *args, **kwargs)
767
Client.__del__(self, *args, **kwargs)
768
769
def checker_callback(self, pid, condition, command,
770
*args, **kwargs):
771
self.checker_callback_tag = None
772
self.checker = None
773
# Emit D-Bus signal
774
self.PropertyChanged(dbus.String(u"checker_running"),
775
dbus.Boolean(False, variant_level=1))
776
if os.WIFEXITED(condition):
777
exitstatus = os.WEXITSTATUS(condition)
778
# Emit D-Bus signal
779
self.CheckerCompleted(dbus.Int16(exitstatus),
780
dbus.Int64(condition),
781
dbus.String(command))
782
else:
783
# Emit D-Bus signal
784
self.CheckerCompleted(dbus.Int16(-1),
785
dbus.Int64(condition),
786
dbus.String(command))
787
788
return Client.checker_callback(self, pid, condition, command,
789
*args, **kwargs)
790
791
def checked_ok(self, *args, **kwargs):
792
r = Client.checked_ok(self, *args, **kwargs)
793
# Emit D-Bus signal
794
self.PropertyChanged(
795
dbus.String(u"last_checked_ok"),
796
(self._datetime_to_dbus(self.last_checked_ok,
797
variant_level=1)))
798
return r
799
800
def start_checker(self, *args, **kwargs):
801
old_checker = self.checker
802
if self.checker is not None:
803
old_checker_pid = self.checker.pid
804
else:
805
old_checker_pid = None
806
r = Client.start_checker(self, *args, **kwargs)
807
# Only if new checker process was started
808
if (self.checker is not None
809
and old_checker_pid != self.checker.pid):
810
# Emit D-Bus signal
811
self.CheckerStarted(self.current_checker_command)
812
self.PropertyChanged(
813
dbus.String(u"checker_running"),
814
dbus.Boolean(True, variant_level=1))
815
return r
816
817
def stop_checker(self, *args, **kwargs):
818
old_checker = getattr(self, u"checker", None)
819
r = Client.stop_checker(self, *args, **kwargs)
820
if (old_checker is not None
821
and getattr(self, u"checker", None) is None):
822
self.PropertyChanged(dbus.String(u"checker_running"),
823
dbus.Boolean(False, variant_level=1))
824
return r
825
826
def _reset_approved(self):
827
self._approved = None
828
return False
829
830
def approve(self, value=True):
831
self._approved = value
832
gobject.timeout_add(self._timedelta_to_milliseconds(self.approved_duration, self._reset_approved))
833
834
835
## D-Bus methods, signals & properties
836
_interface = u"se.bsnet.fukt.Mandos.Client"
837
838
## Signals
839
840
# CheckerCompleted - signal
841
@dbus.service.signal(_interface, signature=u"nxs")
842
def CheckerCompleted(self, exitcode, waitstatus, command):
843
"D-Bus signal"
844
pass
845
846
# CheckerStarted - signal
847
@dbus.service.signal(_interface, signature=u"s")
848
def CheckerStarted(self, command):
849
"D-Bus signal"
850
pass
851
852
# PropertyChanged - signal
853
@dbus.service.signal(_interface, signature=u"sv")
854
def PropertyChanged(self, property, value):
855
"D-Bus signal"
856
pass
857
858
# GotSecret - signal
859
@dbus.service.signal(_interface)
860
def GotSecret(self):
861
"D-Bus signal"
862
pass
863
864
# Rejected - signal
865
@dbus.service.signal(_interface, signature=u"s")
866
def Rejected(self, reason):
867
"D-Bus signal"
868
pass
869
870
# NeedApproval - signal
871
@dbus.service.signal(_interface, signature=u"db")
872
def NeedApproval(self, timeout, default):
873
"D-Bus signal"
874
pass
875
876
## Methods
877
878
# Approve - method
879
@dbus.service.method(_interface, in_signature=u"b")
880
def Approve(self, value):
881
self.approve(value)
882
883
# CheckedOK - method
884
@dbus.service.method(_interface)
885
def CheckedOK(self):
886
return self.checked_ok()
887
888
# Enable - method
889
@dbus.service.method(_interface)
890
def Enable(self):
891
"D-Bus method"
892
self.enable()
893
894
# StartChecker - method
895
@dbus.service.method(_interface)
896
def StartChecker(self):
897
"D-Bus method"
898
self.start_checker()
899
900
# Disable - method
901
@dbus.service.method(_interface)
902
def Disable(self):
903
"D-Bus method"
904
self.disable()
905
906
# StopChecker - method
907
@dbus.service.method(_interface)
908
def StopChecker(self):
909
self.stop_checker()
910
911
## Properties
912
913
# approved_pending - property
914
@dbus_service_property(_interface, signature=u"b", access=u"read")
915
def approved_pending_dbus_property(self):
916
return dbus.Boolean(bool(self.approvals_pending))
917
918
# approved_by_default - property
919
@dbus_service_property(_interface, signature=u"b",
920
access=u"readwrite")
921
def approved_by_default_dbus_property(self):
922
return dbus.Boolean(self.approved_by_default)
923
924
# approved_delay - property
925
@dbus_service_property(_interface, signature=u"t",
926
access=u"readwrite")
927
def approved_delay_dbus_property(self):
928
return dbus.UInt64(self.approved_delay_milliseconds())
929
930
# approved_duration - property
931
@dbus_service_property(_interface, signature=u"t",
932
access=u"readwrite")
933
def approved_duration_dbus_property(self):
934
return dbus.UInt64(self._timedelta_to_milliseconds(
935
self.approved_duration))
936
937
# name - property
938
@dbus_service_property(_interface, signature=u"s", access=u"read")
939
def name_dbus_property(self):
940
return dbus.String(self.name)
941
942
# fingerprint - property
943
@dbus_service_property(_interface, signature=u"s", access=u"read")
944
def fingerprint_dbus_property(self):
945
return dbus.String(self.fingerprint)
946
947
# host - property
948
@dbus_service_property(_interface, signature=u"s",
949
access=u"readwrite")
950
def host_dbus_property(self, value=None):
951
if value is None: # get
952
return dbus.String(self.host)
953
self.host = value
954
# Emit D-Bus signal
955
self.PropertyChanged(dbus.String(u"host"),
956
dbus.String(value, variant_level=1))
957
958
# created - property
959
@dbus_service_property(_interface, signature=u"s", access=u"read")
960
def created_dbus_property(self):
961
return dbus.String(self._datetime_to_dbus(self.created))
962
963
# last_enabled - property
964
@dbus_service_property(_interface, signature=u"s", access=u"read")
965
def last_enabled_dbus_property(self):
966
if self.last_enabled is None:
967
return dbus.String(u"")
968
return dbus.String(self._datetime_to_dbus(self.last_enabled))
969
970
# enabled - property
971
@dbus_service_property(_interface, signature=u"b",
972
access=u"readwrite")
973
def enabled_dbus_property(self, value=None):
974
if value is None: # get
975
return dbus.Boolean(self.enabled)
976
if value:
977
self.enable()
978
else:
979
self.disable()
980
981
# last_checked_ok - property
982
@dbus_service_property(_interface, signature=u"s",
983
access=u"readwrite")
984
def last_checked_ok_dbus_property(self, value=None):
985
if value is not None:
986
self.checked_ok()
987
return
368
def still_valid(self):
369
"""Has the timeout not yet passed for this client?"""
370
now = datetime.datetime.now()
988
371
if self.last_checked_ok is None:
989
return dbus.String(u"")
990
return dbus.String(self._datetime_to_dbus(self
991
.last_checked_ok))
992
993
# timeout - property
994
@dbus_service_property(_interface, signature=u"t",
995
access=u"readwrite")
996
def timeout_dbus_property(self, value=None):
997
if value is None: # get
998
return dbus.UInt64(self.timeout_milliseconds())
999
self.timeout = datetime.timedelta(0, 0, 0, value)
1000
# Emit D-Bus signal
1001
self.PropertyChanged(dbus.String(u"timeout"),
1002
dbus.UInt64(value, variant_level=1))
1003
if getattr(self, u"disable_initiator_tag", None) is None:
1004
return
1005
# Reschedule timeout
1006
gobject.source_remove(self.disable_initiator_tag)
1007
self.disable_initiator_tag = None
1008
time_to_die = (self.
1009
_timedelta_to_milliseconds((self
1010
.last_checked_ok
1011
+ self.timeout)
1012
- datetime.datetime
1013
.utcnow()))
1014
if time_to_die <= 0:
1015
# The timeout has passed
1016
self.disable()
1017
else:
1018
self.disable_initiator_tag = (gobject.timeout_add
1019
(time_to_die, self.disable))
1020
1021
# interval - property
1022
@dbus_service_property(_interface, signature=u"t",
1023
access=u"readwrite")
1024
def interval_dbus_property(self, value=None):
1025
if value is None: # get
1026
return dbus.UInt64(self.interval_milliseconds())
1027
self.interval = datetime.timedelta(0, 0, 0, value)
1028
# Emit D-Bus signal
1029
self.PropertyChanged(dbus.String(u"interval"),
1030
dbus.UInt64(value, variant_level=1))
1031
if getattr(self, u"checker_initiator_tag", None) is None:
1032
return
1033
# Reschedule checker run
1034
gobject.source_remove(self.checker_initiator_tag)
1035
self.checker_initiator_tag = (gobject.timeout_add
1036
(value, self.start_checker))
1037
self.start_checker() # Start one now, too
1038
1039
# checker - property
1040
@dbus_service_property(_interface, signature=u"s",
1041
access=u"readwrite")
1042
def checker_dbus_property(self, value=None):
1043
if value is None: # get
1044
return dbus.String(self.checker_command)
1045
self.checker_command = value
1046
# Emit D-Bus signal
1047
self.PropertyChanged(dbus.String(u"checker"),
1048
dbus.String(self.checker_command,
1049
variant_level=1))
1050
1051
# checker_running - property
1052
@dbus_service_property(_interface, signature=u"b",
1053
access=u"readwrite")
1054
def checker_running_dbus_property(self, value=None):
1055
if value is None: # get
1056
return dbus.Boolean(self.checker is not None)
1057
if value:
1058
self.start_checker()
1059
else:
1060
self.stop_checker()
1061
1062
# object_path - property
1063
@dbus_service_property(_interface, signature=u"o", access=u"read")
1064
def object_path_dbus_property(self):
1065
return self.dbus_object_path # is already a dbus.ObjectPath
1066
1067
# secret = property
1068
@dbus_service_property(_interface, signature=u"ay",
1069
access=u"write", byte_arrays=True)
1070
def secret_dbus_property(self, value):
1071
self.secret = str(value)
1072
1073
del _interface
1074
1075
1076
class ProxyClient(object):
1077
def __init__(self, child_pipe, fpr, address):
1078
self._pipe = child_pipe
1079
self._pipe.send(('init', fpr, address))
1080
if not self._pipe.recv():
1081
raise KeyError()
1082
1083
def __getattribute__(self, name):
1084
if(name == '_pipe'):
1085
return super(ProxyClient, self).__getattribute__(name)
1086
self._pipe.send(('getattr', name))
1087
data = self._pipe.recv()
1088
if data[0] == 'data':
1089
return data[1]
1090
if data[0] == 'function':
1091
def func(*args, **kwargs):
1092
self._pipe.send(('funcall', name, args, kwargs))
1093
return self._pipe.recv()[1]
1094
return func
1095
1096
def __setattr__(self, name, value):
1097
if(name == '_pipe'):
1098
return super(ProxyClient, self).__setattr__(name, value)
1099
self._pipe.send(('setattr', name, value))
1100
1101
1102
class ClientHandler(socketserver.BaseRequestHandler, object):
1103
"""A class to handle client connections.
1104
1105
Instantiated once for each connection to handle it.
372
return now < (self.created + self.timeout)
373
else:
374
return now < (self.last_checked_ok + self.timeout)
375
376
377
def peer_certificate(session):
378
"Return the peer's OpenPGP certificate as a bytestring"
379
# If not an OpenPGP certificate...
380
if gnutls.library.functions.gnutls_certificate_type_get\
381
(session._c_object) \
382
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP:
383
# ...do the normal thing
384
return session.peer_certificate
385
list_size = ctypes.c_uint()
386
cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
387
(session._c_object, ctypes.byref(list_size))
388
if list_size.value == 0:
389
return None
390
cert = cert_list[0]
391
return ctypes.string_at(cert.data, cert.size)
392
393
394
def fingerprint(openpgp):
395
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
396
# New GnuTLS "datum" with the OpenPGP public key
397
datum = gnutls.library.types.gnutls_datum_t\
398
(ctypes.cast(ctypes.c_char_p(openpgp),
399
ctypes.POINTER(ctypes.c_ubyte)),
400
ctypes.c_uint(len(openpgp)))
401
# New empty GnuTLS certificate
402
crt = gnutls.library.types.gnutls_openpgp_crt_t()
403
gnutls.library.functions.gnutls_openpgp_crt_init\
404
(ctypes.byref(crt))
405
# Import the OpenPGP public key into the certificate
406
gnutls.library.functions.gnutls_openpgp_crt_import\
407
(crt, ctypes.byref(datum),
408
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
409
# New buffer for the fingerprint
410
buffer = ctypes.create_string_buffer(20)
411
buffer_length = ctypes.c_size_t()
412
# Get the fingerprint from the certificate into the buffer
413
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
414
(crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
415
# Deinit the certificate
416
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
417
# Convert the buffer to a Python bytestring
418
fpr = ctypes.string_at(buffer, buffer_length.value)
419
# Convert the bytestring to hexadecimal notation
420
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
421
return hex_fpr
422
423
424
class tcp_handler(SocketServer.BaseRequestHandler, object):
425
"""A TCP request handler class.
426
Instantiated by IPv6_TCPServer for each request to handle it.
1106
427
Note: This will run in its own forked process."""
1107
428
1108
429
def handle(self):
1109
with contextlib.closing(self.server.child_pipe) as child_pipe:
1110
logger.info(u"TCP connection from: %s",
1111
unicode(self.client_address))
1112
logger.debug(u"Pipe FD: %d",
1113
self.server.child_pipe.fileno())
1114
1115
session = (gnutls.connection
1116
.ClientSession(self.request,
1117
gnutls.connection
1118
.X509Credentials()))
1119
1120
# Note: gnutls.connection.X509Credentials is really a
1121
# generic GnuTLS certificate credentials object so long as
1122
# no X.509 keys are added to it. Therefore, we can use it
1123
# here despite using OpenPGP certificates.
1124
1125
#priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
1126
# u"+AES-256-CBC", u"+SHA1",
1127
# u"+COMP-NULL", u"+CTYPE-OPENPGP",
1128
# u"+DHE-DSS"))
1129
# Use a fallback default, since this MUST be set.
1130
priority = self.server.gnutls_priority
1131
if priority is None:
1132
priority = u"NORMAL"
1133
(gnutls.library.functions
1134
.gnutls_priority_set_direct(session._c_object,
1135
priority, None))
1136
1137
# Start communication using the Mandos protocol
1138
# Get protocol number
1139
line = self.request.makefile().readline()
1140
logger.debug(u"Protocol version: %r", line)
1141
try:
1142
if int(line.strip().split()[0]) > 1:
1143
raise RuntimeError
1144
except (ValueError, IndexError, RuntimeError), error:
1145
logger.error(u"Unknown protocol version: %s", error)
1146
return
1147
1148
# Start GnuTLS connection
1149
try:
1150
session.handshake()
1151
except gnutls.errors.GNUTLSError, error:
1152
logger.warning(u"Handshake failed: %s", error)
1153
# Do not run session.bye() here: the session is not
1154
# established. Just abandon the request.
1155
return
1156
logger.debug(u"Handshake succeeded")
1157
1158
approval_required = False
1159
try:
1160
try:
1161
fpr = self.fingerprint(self.peer_certificate
1162
(session))
1163
except (TypeError, gnutls.errors.GNUTLSError), error:
1164
logger.warning(u"Bad certificate: %s", error)
1165
return
1166
logger.debug(u"Fingerprint: %s", fpr)
1167
1168
try:
1169
client = ProxyClient(child_pipe, fpr,
1170
self.client_address)
1171
except KeyError:
1172
return
1173
1174
if client.approved_delay:
1175
delay = client.approved_delay
1176
client.approvals_pending += 1
1177
approval_required = True
1178
1179
while True:
1180
if not client.enabled:
1181
logger.warning(u"Client %s is disabled",
1182
client.name)
1183
if self.server.use_dbus:
1184
# Emit D-Bus signal
1185
client.Rejected("Disabled")
1186
return
1187
1188
if client._approved or not client.approved_delay:
1189
#We are approved or approval is disabled
1190
break
1191
elif client._approved is None:
1192
logger.info(u"Client %s need approval",
1193
client.name)
1194
if self.server.use_dbus:
1195
# Emit D-Bus signal
1196
client.NeedApproval(
1197
client.approved_delay_milliseconds(),
1198
client.approved_by_default)
1199
else:
1200
logger.warning(u"Client %s was not approved",
1201
client.name)
1202
if self.server.use_dbus:
1203
# Emit D-Bus signal
1204
client.Rejected("Disapproved")
1205
return
1206
1207
#wait until timeout or approved
1208
#x = float(client._timedelta_to_milliseconds(delay))
1209
time = datetime.datetime.now()
1210
client.changedstate.acquire()
1211
client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))
1212
client.changedstate.release()
1213
time2 = datetime.datetime.now()
1214
if (time2 - time) >= delay:
1215
if not client.approved_by_default:
1216
logger.warning("Client %s timed out while"
1217
" waiting for approval",
1218
client.name)
1219
if self.server.use_dbus:
1220
# Emit D-Bus signal
1221
client.Rejected("Time out")
1222
return
1223
else:
1224
break
1225
else:
1226
delay -= time2 - time
1227
1228
sent_size = 0
1229
while sent_size < len(client.secret):
1230
# XXX handle session exception
1231
sent = session.send(client.secret[sent_size:])
1232
logger.debug(u"Sent: %d, remaining: %d",
1233
sent, len(client.secret)
1234
- (sent_size + sent))
1235
sent_size += sent
1236
1237
logger.info(u"Sending secret to %s", client.name)
1238
# bump the timeout as if seen
1239
client.checked_ok()
1240
if self.server.use_dbus:
1241
# Emit D-Bus signal
1242
client.GotSecret()
1243
1244
finally:
1245
if approval_required:
1246
client.approvals_pending -= 1
1247
session.bye()
1248
1249
@staticmethod
1250
def peer_certificate(session):
1251
"Return the peer's OpenPGP certificate as a bytestring"
1252
# If not an OpenPGP certificate...
1253
if (gnutls.library.functions
1254
.gnutls_certificate_type_get(session._c_object)
1255
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1256
# ...do the normal thing
1257
return session.peer_certificate
1258
list_size = ctypes.c_uint(1)
1259
cert_list = (gnutls.library.functions
1260
.gnutls_certificate_get_peers
1261
(session._c_object, ctypes.byref(list_size)))
1262
if not bool(cert_list) and list_size.value != 0:
1263
raise gnutls.errors.GNUTLSError(u"error getting peer"
1264
u" certificate")
1265
if list_size.value == 0:
1266
return None
1267
cert = cert_list[0]
1268
return ctypes.string_at(cert.data, cert.size)
1269
1270
@staticmethod
1271
def fingerprint(openpgp):
1272
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1273
# New GnuTLS "datum" with the OpenPGP public key
1274
datum = (gnutls.library.types
1275
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1276
ctypes.POINTER
1277
(ctypes.c_ubyte)),
1278
ctypes.c_uint(len(openpgp))))
1279
# New empty GnuTLS certificate
1280
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1281
(gnutls.library.functions
1282
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1283
# Import the OpenPGP public key into the certificate
1284
(gnutls.library.functions
1285
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1286
gnutls.library.constants
1287
.GNUTLS_OPENPGP_FMT_RAW))
1288
# Verify the self signature in the key
1289
crtverify = ctypes.c_uint()
1290
(gnutls.library.functions
1291
.gnutls_openpgp_crt_verify_self(crt, 0,
1292
ctypes.byref(crtverify)))
1293
if crtverify.value != 0:
1294
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1295
raise (gnutls.errors.CertificateSecurityError
1296
(u"Verify failed"))
1297
# New buffer for the fingerprint
1298
buf = ctypes.create_string_buffer(20)
1299
buf_len = ctypes.c_size_t()
1300
# Get the fingerprint from the certificate into the buffer
1301
(gnutls.library.functions
1302
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1303
ctypes.byref(buf_len)))
1304
# Deinit the certificate
1305
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1306
# Convert the buffer to a Python bytestring
1307
fpr = ctypes.string_at(buf, buf_len.value)
1308
# Convert the bytestring to hexadecimal notation
1309
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
1310
return hex_fpr
1311
1312
1313
class MultiprocessingMixIn(object):
1314
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1315
def sub_process_main(self, request, address):
1316
try:
1317
self.finish_request(request, address)
1318
except:
1319
self.handle_error(request, address)
1320
self.close_request(request)
1321
1322
def process_request(self, request, address):
1323
"""Start a new process to process the request."""
1324
multiprocessing.Process(target = self.sub_process_main,
1325
args = (request, address)).start()
1326
1327
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1328
""" adds a pipe to the MixIn """
1329
def process_request(self, request, client_address):
1330
"""Overrides and wraps the original process_request().
1331
1332
This function creates a new pipe in self.pipe
1333
"""
1334
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1335
1336
super(MultiprocessingMixInWithPipe,
1337
self).process_request(request, client_address)
1338
self.add_pipe(parent_pipe)
1339
def add_pipe(self, parent_pipe):
1340
"""Dummy function; override as necessary"""
1341
pass
1342
1343
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1344
socketserver.TCPServer, object):
1345
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1346
430
logger.info(u"TCP connection from: %s",
431
unicode(self.client_address))
432
session = gnutls.connection.ClientSession\
433
(self.request, gnutls.connection.X509Credentials())
434
435
line = self.request.makefile().readline()
436
logger.debug(u"Protocol version: %r", line)
437
try:
438
if int(line.strip().split()[0]) > 1:
439
raise RuntimeError
440
except (ValueError, IndexError, RuntimeError), error:
441
logger.error(u"Unknown protocol version: %s", error)
442
return
443
444
# Note: gnutls.connection.X509Credentials is really a generic
445
# GnuTLS certificate credentials object so long as no X.509
446
# keys are added to it. Therefore, we can use it here despite
447
# using OpenPGP certificates.
448
449
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
450
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
451
# "+DHE-DSS"))
452
priority = "NORMAL" # Fallback default, since this
453
# MUST be set.
454
if self.server.settings["priority"]:
455
priority = self.server.settings["priority"]
456
gnutls.library.functions.gnutls_priority_set_direct\
457
(session._c_object, priority, None);
458
459
try:
460
session.handshake()
461
except gnutls.errors.GNUTLSError, error:
462
logger.warning(u"Handshake failed: %s", error)
463
# Do not run session.bye() here: the session is not
464
# established. Just abandon the request.
465
return
466
try:
467
fpr = fingerprint(peer_certificate(session))
468
except (TypeError, gnutls.errors.GNUTLSError), error:
469
logger.warning(u"Bad certificate: %s", error)
470
session.bye()
471
return
472
logger.debug(u"Fingerprint: %s", fpr)
473
client = None
474
for c in self.server.clients:
475
if c.fingerprint == fpr:
476
client = c
477
break
478
if not client:
479
logger.warning(u"Client not found for fingerprint: %s",
480
fpr)
481
session.bye()
482
return
483
# Have to check if client.still_valid(), since it is possible
484
# that the client timed out while establishing the GnuTLS
485
# session.
486
if not client.still_valid():
487
logger.warning(u"Client %(name)s is invalid",
488
vars(client))
489
session.bye()
490
return
491
sent_size = 0
492
while sent_size < len(client.secret):
493
sent = session.send(client.secret[sent_size:])
494
logger.debug(u"Sent: %d, remaining: %d",
495
sent, len(client.secret)
496
- (sent_size + sent))
497
sent_size += sent
498
session.bye()
499
500
501
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
502
"""IPv6 TCP server. Accepts 'None' as address and/or port.
1347
503
Attributes:
1348
enabled: Boolean; whether this server is activated yet
1349
interface: None or a network interface name (string)
1350
use_ipv6: Boolean; to use IPv6 or not
504
settings: Server settings
505
clients: Set() of Client objects
1351
506
"""
1352
def __init__(self, server_address, RequestHandlerClass,
1353
interface=None, use_ipv6=True):
1354
self.interface = interface
1355
if use_ipv6:
1356
self.address_family = socket.AF_INET6
1357
socketserver.TCPServer.__init__(self, server_address,
1358
RequestHandlerClass)
507
address_family = socket.AF_INET6
508
def __init__(self, *args, **kwargs):
509
if "settings" in kwargs:
510
self.settings = kwargs["settings"]
511
del kwargs["settings"]
512
if "clients" in kwargs:
513
self.clients = kwargs["clients"]
514
del kwargs["clients"]
515
return super(type(self), self).__init__(*args, **kwargs)
1359
516
def server_bind(self):
1360
517
"""This overrides the normal server_bind() function
1361
518
to bind to an interface if one was specified, and also NOT to
1362
519
bind to an address or port if they were not specified."""
1363
if self.interface is not None:
1364
if SO_BINDTODEVICE is None:
1365
logger.error(u"SO_BINDTODEVICE does not exist;"
1366
u" cannot bind to interface %s",
1367
self.interface)
1368
else:
1369
try:
1370
self.socket.setsockopt(socket.SOL_SOCKET,
1371
SO_BINDTODEVICE,
1372
str(self.interface
1373
+ u'\0'))
1374
except socket.error, error:
1375
if error[0] == errno.EPERM:
1376
logger.error(u"No permission to"
1377
u" bind to interface %s",
1378
self.interface)
1379
elif error[0] == errno.ENOPROTOOPT:
1380
logger.error(u"SO_BINDTODEVICE not available;"
1381
u" cannot bind to interface %s",
1382
self.interface)
1383
else:
1384
raise
520
if self.settings["interface"]:
521
# 25 is from /usr/include/asm-i486/socket.h
522
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
523
try:
524
self.socket.setsockopt(socket.SOL_SOCKET,
525
SO_BINDTODEVICE,
526
self.settings["interface"])
527
except socket.error, error:
528
if error[0] == errno.EPERM:
529
logger.error(u"No permission to"
530
u" bind to interface %s",
531
self.settings["interface"])
532
else:
533
raise error
1385
534
# Only bind(2) the socket if we really need to.
1386
535
if self.server_address[0] or self.server_address[1]:
1387
536
if not self.server_address[0]:
1388
if self.address_family == socket.AF_INET6:
1389
any_address = u"::" # in6addr_any
1390
else:
1391
any_address = socket.INADDR_ANY
1392
self.server_address = (any_address,
537
in6addr_any = "::"
538
self.server_address = (in6addr_any,
1393
539
self.server_address[1])
1394
540
elif not self.server_address[1]:
1395
541
self.server_address = (self.server_address[0],
1396
542
0)
1397
# if self.interface:
543
# if self.settings["interface"]:
1398
544
# self.server_address = (self.server_address[0],
1399
545
# 0, # port
1400
546
# 0, # flowinfo
1401
547
# if_nametoindex
1402
# (self.interface))
1403
return socketserver.TCPServer.server_bind(self)
1404
1405
1406
class MandosServer(IPv6_TCPServer):
1407
"""Mandos server.
1408
1409
Attributes:
1410
clients: set of Client objects
1411
gnutls_priority GnuTLS priority string
1412
use_dbus: Boolean; to emit D-Bus signals or not
1413
1414
Assumes a gobject.MainLoop event loop.
1415
"""
1416
def __init__(self, server_address, RequestHandlerClass,
1417
interface=None, use_ipv6=True, clients=None,
1418
gnutls_priority=None, use_dbus=True):
1419
self.enabled = False
1420
self.clients = clients
1421
if self.clients is None:
1422
self.clients = set()
1423
self.use_dbus = use_dbus
1424
self.gnutls_priority = gnutls_priority
1425
IPv6_TCPServer.__init__(self, server_address,
1426
RequestHandlerClass,
1427
interface = interface,
1428
use_ipv6 = use_ipv6)
1429
def server_activate(self):
1430
if self.enabled:
1431
return socketserver.TCPServer.server_activate(self)
1432
def enable(self):
1433
self.enabled = True
1434
def add_pipe(self, parent_pipe):
1435
# Call "handle_ipc" for both data and EOF events
1436
gobject.io_add_watch(parent_pipe.fileno(),
1437
gobject.IO_IN | gobject.IO_HUP,
1438
functools.partial(self.handle_ipc,
1439
parent_pipe = parent_pipe))
1440
1441
def handle_ipc(self, source, condition, parent_pipe=None,
1442
client_object=None):
1443
condition_names = {
1444
gobject.IO_IN: u"IN", # There is data to read.
1445
gobject.IO_OUT: u"OUT", # Data can be written (without
1446
# blocking).
1447
gobject.IO_PRI: u"PRI", # There is urgent data to read.
1448
gobject.IO_ERR: u"ERR", # Error condition.
1449
gobject.IO_HUP: u"HUP" # Hung up (the connection has been
1450
# broken, usually for pipes and
1451
# sockets).
1452
}
1453
conditions_string = ' | '.join(name
1454
for cond, name in
1455
condition_names.iteritems()
1456
if cond & condition)
1457
logger.debug(u"Handling IPC: FD = %d, condition = %s", source,
1458
conditions_string)
1459
1460
# Read a request from the child
1461
request = parent_pipe.recv()
1462
command = request[0]
1463
1464
if command == 'init':
1465
fpr = request[1]
1466
address = request[2]
1467
1468
for c in self.clients:
1469
if c.fingerprint == fpr:
1470
client = c
1471
break
1472
else:
1473
logger.warning(u"Client not found for fingerprint: %s, ad"
1474
u"dress: %s", fpr, address)
1475
if self.use_dbus:
1476
# Emit D-Bus signal
1477
mandos_dbus_service.ClientNotFound(fpr, address)
1478
parent_pipe.send(False)
1479
return False
1480
1481
gobject.io_add_watch(parent_pipe.fileno(),
1482
gobject.IO_IN | gobject.IO_HUP,
1483
functools.partial(self.handle_ipc,
1484
parent_pipe = parent_pipe,
1485
client_object = client))
1486
parent_pipe.send(True)
1487
# remove the old hook in favor of the new above hook on same fileno
1488
return False
1489
if command == 'funcall':
1490
funcname = request[1]
1491
args = request[2]
1492
kwargs = request[3]
1493
1494
parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))
1495
1496
if command == 'getattr':
1497
attrname = request[1]
1498
if callable(client_object.__getattribute__(attrname)):
1499
parent_pipe.send(('function',))
1500
else:
1501
parent_pipe.send(('data', client_object.__getattribute__(attrname)))
1502
1503
if command == 'setattr':
1504
attrname = request[1]
1505
value = request[2]
1506
setattr(client_object, attrname, value)
1507
1508
return True
548
# (self.settings
549
# ["interface"]))
550
return super(type(self), self).server_bind()
1509
551
1510
552
1511
553
def string_to_delta(interval):
1512
554
"""Parse a string and return a datetime.timedelta
1513
1514
>>> string_to_delta(u'7d')
555
556
>>> string_to_delta('7d')
1515
557
datetime.timedelta(7)
1516
>>> string_to_delta(u'60s')
558
>>> string_to_delta('60s')
1517
559
datetime.timedelta(0, 60)
1518
>>> string_to_delta(u'60m')
560
>>> string_to_delta('60m')
1519
561
datetime.timedelta(0, 3600)
1520
>>> string_to_delta(u'24h')
562
>>> string_to_delta('24h')
1521
563
datetime.timedelta(1)
1522
564
>>> string_to_delta(u'1w')
1523
565
datetime.timedelta(7)
1524
>>> string_to_delta(u'5m 30s')
1525
datetime.timedelta(0, 330)
1526
566
"""
1527
timevalue = datetime.timedelta(0)
1528
for s in interval.split():
1529
try:
1530
suffix = unicode(s[-1])
1531
value = int(s[:-1])
1532
if suffix == u"d":
1533
delta = datetime.timedelta(value)
1534
elif suffix == u"s":
1535
delta = datetime.timedelta(0, value)
1536
elif suffix == u"m":
1537
delta = datetime.timedelta(0, 0, 0, 0, value)
1538
elif suffix == u"h":
1539
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
1540
elif suffix == u"w":
1541
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1542
else:
1543
raise ValueError(u"Unknown suffix %r" % suffix)
1544
except (ValueError, IndexError), e:
1545
raise ValueError(e.message)
1546
timevalue += delta
1547
return timevalue
1548
567
try:
568
suffix=unicode(interval[-1])
569
value=int(interval[:-1])
570
if suffix == u"d":
571
delta = datetime.timedelta(value)
572
elif suffix == u"s":
573
delta = datetime.timedelta(0, value)
574
elif suffix == u"m":
575
delta = datetime.timedelta(0, 0, 0, 0, value)
576
elif suffix == u"h":
577
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
578
elif suffix == u"w":
579
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
580
else:
581
raise ValueError
582
except (ValueError, IndexError):
583
raise ValueError
584
return delta
585
586
587
def server_state_changed(state):
588
"""Derived from the Avahi example code"""
589
if state == avahi.SERVER_COLLISION:
590
logger.error(u"Server name collision")
591
service.remove()
592
elif state == avahi.SERVER_RUNNING:
593
service.add()
594
595
596
def entry_group_state_changed(state, error):
597
"""Derived from the Avahi example code"""
598
logger.debug(u"state change: %i", state)
599
600
if state == avahi.ENTRY_GROUP_ESTABLISHED:
601
logger.debug(u"Service established.")
602
elif state == avahi.ENTRY_GROUP_COLLISION:
603
logger.warning(u"Service name collision.")
604
service.rename()
605
elif state == avahi.ENTRY_GROUP_FAILURE:
606
logger.critical(u"Error in group state changed %s",
607
unicode(error))
608
raise AvahiGroupError("State changed: %s", str(error))
1549
609
1550
610
def if_nametoindex(interface):
1551
"""Call the C function if_nametoindex(), or equivalent
1552
1553
Note: This function cannot accept a unicode string."""
611
"""Call the C function if_nametoindex(), or equivalent"""
1554
612
global if_nametoindex
1555
613
try:
1556
if_nametoindex = (ctypes.cdll.LoadLibrary
1557
(ctypes.util.find_library(u"c"))
1558
.if_nametoindex)
614
if "ctypes.util" not in sys.modules:
615
import ctypes.util
616
if_nametoindex = ctypes.cdll.LoadLibrary\
617
(ctypes.util.find_library("c")).if_nametoindex
1559
618
except (OSError, AttributeError):
1560
logger.warning(u"Doing if_nametoindex the hard way")
619
if "struct" not in sys.modules:
620
import struct
621
if "fcntl" not in sys.modules:
622
import fcntl
1561
623
def if_nametoindex(interface):
1562
624
"Get an interface index the hard way, i.e. using fcntl()"
1563
625
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1564
with contextlib.closing(socket.socket()) as s:
1565
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1566
struct.pack(str(u"16s16x"),
1567
interface))
1568
interface_index = struct.unpack(str(u"I"),
1569
ifreq[16:20])[0]
626
s = socket.socket()
627
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
628
struct.pack("16s16x", interface))
629
s.close()
630
interface_index = struct.unpack("I", ifreq[16:20])[0]
1570
631
return interface_index
1571
632
return if_nametoindex(interface)
1572
633
1573
634
1574
635
def daemon(nochdir = False, noclose = False):
1575
636
"""See daemon(3). Standard BSD Unix function.
1576
1577
637
This should really exist as os.daemon, but it doesn't (yet)."""
1578
638
if os.fork():
1579
639
sys.exit()
1580
640
os.setsid()
1581
641
if not nochdir:
1582
os.chdir(u"/")
642
os.chdir("/")
1583
643
if os.fork():
1584
644
sys.exit()
1585
645
if not noclose:
1587
647
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1588
648
if not stat.S_ISCHR(os.fstat(null).st_mode):
1589
649
raise OSError(errno.ENODEV,
1590
u"%s not a character device"
1591
% os.path.devnull)
650
"/dev/null not a character device")
1592
651
os.dup2(null, sys.stdin.fileno())
1593
652
os.dup2(null, sys.stdout.fileno())
1594
653
os.dup2(null, sys.stderr.fileno())
1597
656
1598
657
1599
658
def main():
1600
1601
##################################################################
1602
# Parsing of options, both command line and config file
1603
1604
parser = optparse.OptionParser(version = "%%prog %s" % version)
1605
parser.add_option("-i", u"--interface", type=u"string",
1606
metavar="IF", help=u"Bind to interface IF")
1607
parser.add_option("-a", u"--address", type=u"string",
1608
help=u"Address to listen for requests on")
1609
parser.add_option("-p", u"--port", type=u"int",
1610
help=u"Port number to receive requests on")
1611
parser.add_option("--check", action=u"store_true",
1612
help=u"Run self-test")
1613
parser.add_option("--debug", action=u"store_true",
1614
help=u"Debug mode; run in foreground and log to"
1615
u" terminal")
1616
parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1617
u" priority string (see GnuTLS documentation)")
1618
parser.add_option("--servicename", type=u"string",
1619
metavar=u"NAME", help=u"Zeroconf service name")
1620
parser.add_option("--configdir", type=u"string",
1621
default=u"/etc/mandos", metavar=u"DIR",
1622
help=u"Directory to search for configuration"
1623
u" files")
1624
parser.add_option("--no-dbus", action=u"store_false",
1625
dest=u"use_dbus", help=u"Do not provide D-Bus"
1626
u" system bus interface")
1627
parser.add_option("--no-ipv6", action=u"store_false",
1628
dest=u"use_ipv6", help=u"Do not use IPv6")
1629
options = parser.parse_args()[0]
659
global main_loop_started
660
main_loop_started = False
661
662
parser = OptionParser(version = "%%prog %s" % version)
663
parser.add_option("-i", "--interface", type="string",
664
metavar="IF", help="Bind to interface IF")
665
parser.add_option("-a", "--address", type="string",
666
help="Address to listen for requests on")
667
parser.add_option("-p", "--port", type="int",
668
help="Port number to receive requests on")
669
parser.add_option("--check", action="store_true", default=False,
670
help="Run self-test")
671
parser.add_option("--debug", action="store_true",
672
help="Debug mode; run in foreground and log to"
673
" terminal")
674
parser.add_option("--priority", type="string", help="GnuTLS"
675
" priority string (see GnuTLS documentation)")
676
parser.add_option("--servicename", type="string", metavar="NAME",
677
help="Zeroconf service name")
678
parser.add_option("--configdir", type="string",
679
default="/etc/mandos", metavar="DIR",
680
help="Directory to search for configuration"
681
" files")
682
(options, args) = parser.parse_args()
1630
683
1631
684
if options.check:
1632
685
import doctest
1634
687
sys.exit()
1635
688
1636
689
# Default values for config file for server-global settings
1637
server_defaults = { u"interface": u"",
1638
u"address": u"",
1639
u"port": u"",
1640
u"debug": u"False",
1641
u"priority":
1642
u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1643
u"servicename": u"Mandos",
1644
u"use_dbus": u"True",
1645
u"use_ipv6": u"True",
690
server_defaults = { "interface": "",
691
"address": "",
692
"port": "",
693
"debug": "False",
694
"priority":
695
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
696
"servicename": "Mandos",
1646
697
}
1647
698
1648
699
# Parse config file for server-global settings
1649
server_config = configparser.SafeConfigParser(server_defaults)
700
server_config = ConfigParser.SafeConfigParser(server_defaults)
1650
701
del server_defaults
1651
server_config.read(os.path.join(options.configdir,
1652
u"mandos.conf"))
702
server_config.read(os.path.join(options.configdir, "mandos.conf"))
703
server_section = "server"
1653
704
# Convert the SafeConfigParser object to a dict
1654
server_settings = server_config.defaults()
1655
# Use the appropriate methods on the non-string config options
1656
for option in (u"debug", u"use_dbus", u"use_ipv6"):
1657
server_settings[option] = server_config.getboolean(u"DEFAULT",
1658
option)
1659
if server_settings["port"]:
1660
server_settings["port"] = server_config.getint(u"DEFAULT",
1661
u"port")
705
server_settings = dict(server_config.items(server_section))
706
# Use getboolean on the boolean config option
707
server_settings["debug"] = server_config.getboolean\
708
(server_section, "debug")
1662
709
del server_config
1663
710
1664
711
# Override the settings from the config file with command line
1665
712
# options, if set.
1666
for option in (u"interface", u"address", u"port", u"debug",
1667
u"priority", u"servicename", u"configdir",
1668
u"use_dbus", u"use_ipv6"):
713
for option in ("interface", "address", "port", "debug",
714
"priority", "servicename", "configdir"):
1669
715
value = getattr(options, option)
1670
716
if value is not None:
1671
717
server_settings[option] = value
1672
718
del options
1673
# Force all strings to be unicode
1674
for option in server_settings.keys():
1675
if type(server_settings[option]) is str:
1676
server_settings[option] = unicode(server_settings[option])
1677
719
# Now we have our good server settings in "server_settings"
1678
720
1679
##################################################################
1680
1681
# For convenience
1682
debug = server_settings[u"debug"]
1683
use_dbus = server_settings[u"use_dbus"]
1684
use_ipv6 = server_settings[u"use_ipv6"]
721
debug = server_settings["debug"]
1685
722
1686
723
if not debug:
1687
724
syslogger.setLevel(logging.WARNING)
1688
725
console.setLevel(logging.WARNING)
1689
726
1690
if server_settings[u"servicename"] != u"Mandos":
1691
syslogger.setFormatter(logging.Formatter
1692
(u'Mandos (%s) [%%(process)d]:'
1693
u' %%(levelname)s: %%(message)s'
1694
% server_settings[u"servicename"]))
727
if server_settings["servicename"] != "Mandos":
728
syslogger.setFormatter(logging.Formatter\
729
('Mandos (%s): %%(levelname)s:'
730
' %%(message)s'
731
% server_settings["servicename"]))
1695
732
1696
733
# Parse config file with clients
1697
client_defaults = { u"timeout": u"1h",
1698
u"interval": u"5m",
1699
u"checker": u"fping -q -- %%(host)s",
1700
u"host": u"",
1701
u"approved_delay": u"0s",
1702
u"approved_duration": u"1s",
734
client_defaults = { "timeout": "1h",
735
"interval": "5m",
736
"checker": "fping -q -- %%(host)s",
1703
737
}
1704
client_config = configparser.SafeConfigParser(client_defaults)
1705
client_config.read(os.path.join(server_settings[u"configdir"],
1706
u"clients.conf"))
1707
1708
global mandos_dbus_service
1709
mandos_dbus_service = None
1710
1711
tcp_server = MandosServer((server_settings[u"address"],
1712
server_settings[u"port"]),
1713
ClientHandler,
1714
interface=server_settings[u"interface"],
1715
use_ipv6=use_ipv6,
1716
gnutls_priority=
1717
server_settings[u"priority"],
1718
use_dbus=use_dbus)
1719
pidfilename = u"/var/run/mandos.pid"
1720
try:
1721
pidfile = open(pidfilename, u"w")
1722
except IOError:
1723
logger.error(u"Could not open file %r", pidfilename)
1724
1725
try:
1726
uid = pwd.getpwnam(u"_mandos").pw_uid
1727
gid = pwd.getpwnam(u"_mandos").pw_gid
1728
except KeyError:
1729
try:
1730
uid = pwd.getpwnam(u"mandos").pw_uid
1731
gid = pwd.getpwnam(u"mandos").pw_gid
1732
except KeyError:
1733
try:
1734
uid = pwd.getpwnam(u"nobody").pw_uid
1735
gid = pwd.getpwnam(u"nobody").pw_gid
1736
except KeyError:
1737
uid = 65534
1738
gid = 65534
1739
try:
1740
os.setgid(gid)
1741
os.setuid(uid)
1742
except OSError, error:
1743
if error[0] != errno.EPERM:
1744
raise error
1745
1746
# Enable all possible GnuTLS debugging
1747
if debug:
1748
# "Use a log level over 10 to enable all debugging options."
1749
# - GnuTLS manual
1750
gnutls.library.functions.gnutls_global_set_log_level(11)
1751
1752
@gnutls.library.types.gnutls_log_func
1753
def debug_gnutls(level, string):
1754
logger.debug(u"GnuTLS: %s", string[:-1])
1755
1756
(gnutls.library.functions
1757
.gnutls_global_set_log_function(debug_gnutls))
738
client_config = ConfigParser.SafeConfigParser(client_defaults)
739
client_config.read(os.path.join(server_settings["configdir"],
740
"clients.conf"))
741
742
global service
743
service = AvahiService(name = server_settings["servicename"],
744
type = "_mandos._tcp", );
745
if server_settings["interface"]:
746
service.interface = if_nametoindex(server_settings["interface"])
1758
747
1759
748
global main_loop
749
global bus
750
global server
1760
751
# From the Avahi example code
1761
752
DBusGMainLoop(set_as_default=True )
1762
753
main_loop = gobject.MainLoop()
1763
754
bus = dbus.SystemBus()
755
server = dbus.Interface(
756
bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
757
avahi.DBUS_INTERFACE_SERVER )
1764
758
# End of Avahi example code
1765
if use_dbus:
1766
try:
1767
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos",
1768
bus, do_not_queue=True)
1769
except dbus.exceptions.NameExistsException, e:
1770
logger.error(unicode(e) + u", disabling D-Bus")
1771
use_dbus = False
1772
server_settings[u"use_dbus"] = False
1773
tcp_server.use_dbus = False
1774
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1775
service = AvahiService(name = server_settings[u"servicename"],
1776
servicetype = u"_mandos._tcp",
1777
protocol = protocol, bus = bus)
1778
if server_settings["interface"]:
1779
service.interface = (if_nametoindex
1780
(str(server_settings[u"interface"])))
1781
1782
client_class = Client
1783
if use_dbus:
1784
client_class = functools.partial(ClientDBus, bus = bus)
1785
def client_config_items(config, section):
1786
special_settings = {
1787
"approved_by_default":
1788
lambda: config.getboolean(section,
1789
"approved_by_default"),
1790
}
1791
for name, value in config.items(section):
1792
try:
1793
yield (name, special_settings[name]())
1794
except KeyError:
1795
yield (name, value)
1796
1797
tcp_server.clients.update(set(
1798
client_class(name = section,
1799
config= dict(client_config_items(
1800
client_config, section)))
1801
for section in client_config.sections()))
1802
if not tcp_server.clients:
1803
logger.warning(u"No clients defined")
1804
1805
if debug:
1806
# Redirect stdin so all checkers get /dev/null
1807
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1808
os.dup2(null, sys.stdin.fileno())
1809
if null > 2:
1810
os.close(null)
1811
else:
1812
# No console logging
759
760
clients = Set()
761
def remove_from_clients(client):
762
clients.remove(client)
763
if not clients:
764
logger.critical(u"No clients left, exiting")
765
sys.exit()
766
767
clients.update(Set(Client(name = section,
768
stop_hook = remove_from_clients,
769
config
770
= dict(client_config.items(section)))
771
for section in client_config.sections()))
772
if not clients:
773
logger.critical(u"No clients defined")
774
sys.exit(1)
775
776
if not debug:
1813
777
logger.removeHandler(console)
1814
# Close all input and output, do double fork, etc.
1815
778
daemon()
1816
779
780
pidfilename = "/var/run/mandos/mandos.pid"
781
pid = os.getpid()
1817
782
try:
1818
with pidfile:
1819
pid = os.getpid()
1820
pidfile.write(str(pid) + "\n")
783
pidfile = open(pidfilename, "w")
784
pidfile.write(str(pid) + "\n")
785
pidfile.close()
1821
786
del pidfile
1822
except IOError:
1823
logger.error(u"Could not write to file %r with PID %d",
1824
pidfilename, pid)
1825
except NameError:
1826
# "pidfile" was never created
1827
pass
1828
del pidfilename
787
except IOError, err:
788
logger.error(u"Could not write %s file with PID %d",
789
pidfilename, os.getpid())
790
791
def cleanup():
792
"Cleanup function; run on exit"
793
global group
794
# From the Avahi example code
795
if not group is None:
796
group.Free()
797
group = None
798
# End of Avahi example code
799
800
while clients:
801
client = clients.pop()
802
client.stop_hook = None
803
client.stop()
804
805
atexit.register(cleanup)
1829
806
1830
807
if not debug:
1831
808
signal.signal(signal.SIGINT, signal.SIG_IGN)
1832
809
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1833
810
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1834
811
1835
if use_dbus:
1836
class MandosDBusService(dbus.service.Object):
1837
"""A D-Bus proxy object"""
1838
def __init__(self):
1839
dbus.service.Object.__init__(self, bus, u"/")
1840
_interface = u"se.bsnet.fukt.Mandos"
1841
1842
@dbus.service.signal(_interface, signature=u"o")
1843
def ClientAdded(self, objpath):
1844
"D-Bus signal"
1845
pass
1846
1847
@dbus.service.signal(_interface, signature=u"ss")
1848
def ClientNotFound(self, fingerprint, address):
1849
"D-Bus signal"
1850
pass
1851
1852
@dbus.service.signal(_interface, signature=u"os")
1853
def ClientRemoved(self, objpath, name):
1854
"D-Bus signal"
1855
pass
1856
1857
@dbus.service.method(_interface, out_signature=u"ao")
1858
def GetAllClients(self):
1859
"D-Bus method"
1860
return dbus.Array(c.dbus_object_path
1861
for c in tcp_server.clients)
1862
1863
@dbus.service.method(_interface,
1864
out_signature=u"a{oa{sv}}")
1865
def GetAllClientsWithProperties(self):
1866
"D-Bus method"
1867
return dbus.Dictionary(
1868
((c.dbus_object_path, c.GetAll(u""))
1869
for c in tcp_server.clients),
1870
signature=u"oa{sv}")
1871
1872
@dbus.service.method(_interface, in_signature=u"o")
1873
def RemoveClient(self, object_path):
1874
"D-Bus method"
1875
for c in tcp_server.clients:
1876
if c.dbus_object_path == object_path:
1877
tcp_server.clients.remove(c)
1878
c.remove_from_connection()
1879
# Don't signal anything except ClientRemoved
1880
c.disable(quiet=True)
1881
# Emit D-Bus signal
1882
self.ClientRemoved(object_path, c.name)
1883
return
1884
raise KeyError(object_path)
1885
1886
del _interface
1887
1888
mandos_dbus_service = MandosDBusService()
1889
1890
def cleanup():
1891
"Cleanup function; run on exit"
1892
service.cleanup()
1893
1894
while tcp_server.clients:
1895
client = tcp_server.clients.pop()
1896
if use_dbus:
1897
client.remove_from_connection()
1898
client.disable_hook = None
1899
# Don't signal anything except ClientRemoved
1900
client.disable(quiet=True)
1901
if use_dbus:
1902
# Emit D-Bus signal
1903
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
1904
client.name)
1905
1906
atexit.register(cleanup)
1907
1908
for client in tcp_server.clients:
1909
if use_dbus:
1910
# Emit D-Bus signal
1911
mandos_dbus_service.ClientAdded(client.dbus_object_path)
1912
client.enable()
1913
1914
tcp_server.enable()
1915
tcp_server.server_activate()
1916
812
for client in clients:
813
client.start()
814
815
tcp_server = IPv6_TCPServer((server_settings["address"],
816
server_settings["port"]),
817
tcp_handler,
818
settings=server_settings,
819
clients=clients)
1917
820
# Find out what port we got
1918
821
service.port = tcp_server.socket.getsockname()[1]
1919
if use_ipv6:
1920
logger.info(u"Now listening on address %r, port %d,"
1921
" flowinfo %d, scope_id %d"
1922
% tcp_server.socket.getsockname())
1923
else: # IPv4
1924
logger.info(u"Now listening on address %r, port %d"
1925
% tcp_server.socket.getsockname())
822
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
823
u" scope_id %d" % tcp_server.socket.getsockname())
1926
824
1927
825
#service.interface = tcp_server.socket.getsockname()[3]
1928
826
1929
827
try:
1930
828
# From the Avahi example code
829
server.connect_to_signal("StateChanged", server_state_changed)
1931
830
try:
1932
service.activate()
831
server_state_changed(server.GetState())
1933
832
except dbus.exceptions.DBusException, error:
1934
833
logger.critical(u"DBusException: %s", error)
1935
cleanup()
1936
834
sys.exit(1)
1937
835
# End of Avahi example code
1938
836
1939
837
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
1940
838
lambda *args, **kwargs:
1941
(tcp_server.handle_request
1942
(*args[2:], **kwargs) or True))
839
tcp_server.handle_request\
840
(*args[2:], **kwargs) or True)
1943
841
1944
842
logger.debug(u"Starting main loop")
843
main_loop_started = True
1945
844
main_loop.run()
1946
845
except AvahiError, error:
1947
logger.critical(u"AvahiError: %s", error)
1948
cleanup()
846
logger.critical(u"AvahiError: %s" + unicode(error))
1949
847
sys.exit(1)
1950
848
except KeyboardInterrupt:
1951
849
if debug:
1952
print >> sys.stderr
1953
logger.debug(u"Server received KeyboardInterrupt")
1954
logger.debug(u"Server exiting")
1955
# Must run before the D-Bus bus name gets deregistered
1956
cleanup()
850
print
1957
851
1958
852
if __name__ == '__main__':
1959
853
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0