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- Committer: Teddy Hogeborn
- Date: 2008-08-04 16:05:01 UTC
- mfrom: (24.1.15 mandos)
- Revision ID: teddy@fukt.bsnet.se-20080804160501-woej7nf8amgrbc2e
* plugins.d/mandosclient.c (start_mandos_communication): Change "to"
to be a union. All users changed.
to be a union. All users changed.
- files added:
- ca.pem
- files removed:
- .bzr-builddeb
- debian
- debian/po
- files renamed:
- plugin-runner.c => plugbasedclient.c
- plugins.d/mandos-client.c => plugins.d/mandosclient.c
- plugins.d/password-prompt.c => plugins.d/passprompt.c
- mandos.conf => server.conf
- mandos => server.py
- files modified:
- Makefile
added
removed
server.py
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
# following functions: "AvahiService.add", "AvahiService.remove",
10
# "server_state_changed", "entry_group_state_changed", and some lines
11
# 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
57
64
58
import dbus
65
import dbus.service
66
59
import gobject
67
60
import avahi
68
61
from dbus.mainloop.glib import DBusGMainLoop
69
62
import ctypes
70
import ctypes.util
71
import xml.dom.minidom
72
import inspect
73
74
try:
75
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
76
except AttributeError:
77
try:
78
from IN import SO_BINDTODEVICE
79
except ImportError:
80
SO_BINDTODEVICE = None
81
82
83
version = "1.0.14"
84
85
logger = logging.Logger(u'mandos')
86
syslogger = (logging.handlers.SysLogHandler
87
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
88
address = "/dev/log"))
89
syslogger.setFormatter(logging.Formatter
90
(u'Mandos [%(process)d]: %(levelname)s:'
91
u' %(message)s'))
63
64
# Brief description of the operation of this program:
65
#
66
# This server announces itself as a Zeroconf service. Connecting
67
# clients use the TLS protocol, with the unusual quirk that this
68
# server program acts as a TLS "client" while a connecting client acts
69
# as a TLS "server". The client (acting as a TLS "server") must
70
# supply an OpenPGP certificate, and the fingerprint of this
71
# certificate is used by this server to look up (in a list read from a
72
# file at start time) which binary blob to give the client. No other
73
# authentication or authorization is done by this server.
74
75
76
logger = logging.Logger('mandos')
77
syslogger = logging.handlers.SysLogHandler\
78
(facility = logging.handlers.SysLogHandler.LOG_DAEMON)
79
syslogger.setFormatter(logging.Formatter\
80
('%(levelname)s: %(message)s'))
92
81
logger.addHandler(syslogger)
82
del syslogger
93
83
94
console = logging.StreamHandler()
95
console.setFormatter(logging.Formatter(u'%(name)s [%(process)d]:'
96
u' %(levelname)s:'
97
u' %(message)s'))
98
logger.addHandler(console)
99
84
100
85
class AvahiError(Exception):
101
def __init__(self, value, *args, **kwargs):
86
def __init__(self, value):
102
87
self.value = value
103
super(AvahiError, self).__init__(value, *args, **kwargs)
104
def __unicode__(self):
105
return unicode(repr(self.value))
88
def __str__(self):
89
return repr(self.value)
106
90
107
91
class AvahiServiceError(AvahiError):
108
92
pass
112
96
113
97
114
98
class AvahiService(object):
115
"""An Avahi (Zeroconf) service.
116
117
Attributes:
99
"""
118
100
interface: integer; avahi.IF_UNSPEC or an interface index.
119
101
Used to optionally bind to the specified interface.
120
name: string; Example: u'Mandos'
121
type: string; Example: u'_mandos._tcp'.
122
See <http://www.dns-sd.org/ServiceTypes.html>
123
port: integer; what port to announce
124
TXT: list of strings; TXT record for the service
125
domain: string; Domain to publish on, default to .local if empty.
126
host: string; Host to publish records for, default is localhost
127
max_renames: integer; maximum number of renames
128
rename_count: integer; counter so we only rename after collisions
129
a sensible number of times
130
group: D-Bus Entry Group
131
server: D-Bus Server
132
bus: dbus.SystemBus()
102
name = string; Example: "Mandos"
103
type = string; Example: "_mandos._tcp".
104
See <http://www.dns-sd.org/ServiceTypes.html>
105
port = integer; what port to announce
106
TXT = list of strings; TXT record for the service
107
domain = string; Domain to publish on, default to .local if empty.
108
host = string; Host to publish records for, default to localhost
109
if empty.
110
max_renames = integer; maximum number of renames
111
rename_count = integer; counter so we only rename after collisions
112
a sensible number of times
133
113
"""
134
114
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
135
servicetype = None, port = None, TXT = None,
136
domain = u"", host = u"", max_renames = 32768,
137
protocol = avahi.PROTO_UNSPEC, bus = None):
115
type = None, port = None, TXT = None, domain = "",
116
host = "", max_renames = 12):
117
"""An Avahi (Zeroconf) service. """
138
118
self.interface = interface
139
119
self.name = name
140
self.type = servicetype
120
self.type = type
141
121
self.port = port
142
self.TXT = TXT if TXT is not None else []
122
if TXT is None:
123
self.TXT = []
124
else:
125
self.TXT = TXT
143
126
self.domain = domain
144
127
self.host = host
145
128
self.rename_count = 0
146
self.max_renames = max_renames
147
self.protocol = protocol
148
self.group = None # our entry group
149
self.server = None
150
self.bus = bus
151
129
def rename(self):
152
130
"""Derived from the Avahi example code"""
153
131
if self.rename_count >= self.max_renames:
154
logger.critical(u"No suitable Zeroconf service name found"
155
u" after %i retries, exiting.",
156
self.rename_count)
157
raise AvahiServiceError(u"Too many renames")
158
self.name = self.server.GetAlternativeServiceName(self.name)
159
logger.info(u"Changing Zeroconf service name to %r ...",
160
unicode(self.name))
161
syslogger.setFormatter(logging.Formatter
162
(u'Mandos (%s) [%%(process)d]:'
163
u' %%(levelname)s: %%(message)s'
164
% self.name))
132
logger.critical(u"No suitable service name found after %i"
133
u" retries, exiting.", rename_count)
134
raise AvahiServiceError("Too many renames")
135
name = server.GetAlternativeServiceName(name)
136
logger.notice(u"Changing name to %r ...", name)
165
137
self.remove()
166
138
self.add()
167
139
self.rename_count += 1
168
140
def remove(self):
169
141
"""Derived from the Avahi example code"""
170
if self.group is not None:
171
self.group.Reset()
142
if group is not None:
143
group.Reset()
172
144
def add(self):
173
145
"""Derived from the Avahi example code"""
174
if self.group is None:
175
self.group = dbus.Interface(
176
self.bus.get_object(avahi.DBUS_NAME,
177
self.server.EntryGroupNew()),
178
avahi.DBUS_INTERFACE_ENTRY_GROUP)
179
self.group.connect_to_signal('StateChanged',
180
self
181
.entry_group_state_changed)
182
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
183
self.name, self.type)
184
self.group.AddService(
185
self.interface,
186
self.protocol,
187
dbus.UInt32(0), # flags
188
self.name, self.type,
189
self.domain, self.host,
190
dbus.UInt16(self.port),
191
avahi.string_array_to_txt_array(self.TXT))
192
self.group.Commit()
193
def entry_group_state_changed(self, state, error):
194
"""Derived from the Avahi example code"""
195
logger.debug(u"Avahi state change: %i", state)
196
197
if state == avahi.ENTRY_GROUP_ESTABLISHED:
198
logger.debug(u"Zeroconf service established.")
199
elif state == avahi.ENTRY_GROUP_COLLISION:
200
logger.warning(u"Zeroconf service name collision.")
201
self.rename()
202
elif state == avahi.ENTRY_GROUP_FAILURE:
203
logger.critical(u"Avahi: Error in group state changed %s",
204
unicode(error))
205
raise AvahiGroupError(u"State changed: %s"
206
% unicode(error))
207
def cleanup(self):
208
"""Derived from the Avahi example code"""
209
if self.group is not None:
210
self.group.Free()
211
self.group = None
212
def server_state_changed(self, state):
213
"""Derived from the Avahi example code"""
214
if state == avahi.SERVER_COLLISION:
215
logger.error(u"Zeroconf server name collision")
216
self.remove()
217
elif state == avahi.SERVER_RUNNING:
218
self.add()
219
def activate(self):
220
"""Derived from the Avahi example code"""
221
if self.server is None:
222
self.server = dbus.Interface(
223
self.bus.get_object(avahi.DBUS_NAME,
224
avahi.DBUS_PATH_SERVER),
225
avahi.DBUS_INTERFACE_SERVER)
226
self.server.connect_to_signal(u"StateChanged",
227
self.server_state_changed)
228
self.server_state_changed(self.server.GetState())
146
global group
147
if group is None:
148
group = dbus.Interface\
149
(bus.get_object(avahi.DBUS_NAME,
150
server.EntryGroupNew()),
151
avahi.DBUS_INTERFACE_ENTRY_GROUP)
152
group.connect_to_signal('StateChanged',
153
entry_group_state_changed)
154
logger.debug(u"Adding service '%s' of type '%s' ...",
155
service.name, service.type)
156
group.AddService(
157
self.interface, # interface
158
avahi.PROTO_INET6, # protocol
159
dbus.UInt32(0), # flags
160
self.name, self.type,
161
self.domain, self.host,
162
dbus.UInt16(self.port),
163
avahi.string_array_to_txt_array(self.TXT))
164
group.Commit()
165
166
# From the Avahi example code:
167
group = None # our entry group
168
# End of Avahi example code
229
169
230
170
231
171
class Client(object):
232
172
"""A representation of a client host served by this server.
233
234
173
Attributes:
235
name: string; from the config file, used in log messages and
236
D-Bus identifiers
174
name: string; from the config file, used in log messages
237
175
fingerprint: string (40 or 32 hexadecimal digits); used to
238
176
uniquely identify the client
239
secret: bytestring; sent verbatim (over TLS) to client
240
host: string; available for use by the checker command
241
created: datetime.datetime(); (UTC) object creation
242
last_enabled: datetime.datetime(); (UTC)
243
enabled: bool()
244
last_checked_ok: datetime.datetime(); (UTC) or None
245
timeout: datetime.timedelta(); How long from last_checked_ok
246
until this client is disabled
247
interval: datetime.timedelta(); How often to start a new checker
248
disable_hook: If set, called by disable() as disable_hook(self)
249
checker: subprocess.Popen(); a running checker process used
250
to see if the client lives.
251
'None' if no process is running.
177
secret: bytestring; sent verbatim (over TLS) to client
178
fqdn: string (FQDN); available for use by the checker command
179
created: datetime.datetime(); object creation, not client host
180
last_checked_ok: datetime.datetime() or None if not yet checked OK
181
timeout: datetime.timedelta(); How long from last_checked_ok
182
until this client is invalid
183
interval: datetime.timedelta(); How often to start a new checker
184
stop_hook: If set, called by stop() as stop_hook(self)
185
checker: subprocess.Popen(); a running checker process used
186
to see if the client lives.
187
'None' if no process is running.
252
188
checker_initiator_tag: a gobject event source tag, or None
253
disable_initiator_tag: - '' -
189
stop_initiator_tag: - '' -
254
190
checker_callback_tag: - '' -
255
191
checker_command: string; External command which is run to check if
256
192
client lives. %() expansions are done at
257
193
runtime with vars(self) as dict, so that for
258
194
instance %(name)s can be used in the command.
259
current_checker_command: string; current running checker_command
195
Private attibutes:
196
_timeout: Real variable for 'timeout'
197
_interval: Real variable for 'interval'
198
_timeout_milliseconds: Used when calling gobject.timeout_add()
199
_interval_milliseconds: - '' -
260
200
"""
261
262
@staticmethod
263
def _timedelta_to_milliseconds(td):
264
"Convert a datetime.timedelta() to milliseconds"
265
return ((td.days * 24 * 60 * 60 * 1000)
266
+ (td.seconds * 1000)
267
+ (td.microseconds // 1000))
268
269
def timeout_milliseconds(self):
270
"Return the 'timeout' attribute in milliseconds"
271
return self._timedelta_to_milliseconds(self.timeout)
272
273
def interval_milliseconds(self):
274
"Return the 'interval' attribute in milliseconds"
275
return self._timedelta_to_milliseconds(self.interval)
276
277
def __init__(self, name = None, disable_hook=None, config=None):
278
"""Note: the 'checker' key in 'config' sets the
279
'checker_command' attribute and *not* the 'checker'
280
attribute."""
201
def _set_timeout(self, timeout):
202
"Setter function for 'timeout' attribute"
203
self._timeout = timeout
204
self._timeout_milliseconds = ((self.timeout.days
205
* 24 * 60 * 60 * 1000)
206
+ (self.timeout.seconds * 1000)
207
+ (self.timeout.microseconds
208
// 1000))
209
timeout = property(lambda self: self._timeout,
210
_set_timeout)
211
del _set_timeout
212
def _set_interval(self, interval):
213
"Setter function for 'interval' attribute"
214
self._interval = interval
215
self._interval_milliseconds = ((self.interval.days
216
* 24 * 60 * 60 * 1000)
217
+ (self.interval.seconds
218
* 1000)
219
+ (self.interval.microseconds
220
// 1000))
221
interval = property(lambda self: self._interval,
222
_set_interval)
223
del _set_interval
224
def __init__(self, name=None, stop_hook=None, fingerprint=None,
225
secret=None, secfile=None, fqdn=None, timeout=None,
226
interval=-1, checker=None):
227
"""Note: the 'checker' argument sets the 'checker_command'
228
attribute and not the 'checker' attribute.."""
281
229
self.name = name
282
if config is None:
283
config = {}
284
230
logger.debug(u"Creating client %r", self.name)
285
# Uppercase and remove spaces from fingerprint for later
286
# comparison purposes with return value from the fingerprint()
287
# function
288
self.fingerprint = (config[u"fingerprint"].upper()
289
.replace(u" ", u""))
231
# Uppercase and remove spaces from fingerprint
232
# for later comparison purposes with return value of
233
# the fingerprint() function
234
self.fingerprint = fingerprint.upper().replace(u" ", u"")
290
235
logger.debug(u" Fingerprint: %s", self.fingerprint)
291
if u"secret" in config:
292
self.secret = config[u"secret"].decode(u"base64")
293
elif u"secfile" in config:
294
with open(os.path.expanduser(os.path.expandvars
295
(config[u"secfile"])),
296
"rb") as secfile:
297
self.secret = secfile.read()
236
if secret:
237
self.secret = secret.decode(u"base64")
238
elif secfile:
239
sf = open(secfile)
240
self.secret = sf.read()
241
sf.close()
298
242
else:
299
243
raise TypeError(u"No secret or secfile for client %s"
300
244
% self.name)
301
self.host = config.get(u"host", u"")
302
self.created = datetime.datetime.utcnow()
303
self.enabled = False
304
self.last_enabled = None
245
self.fqdn = fqdn
246
self.created = datetime.datetime.now()
305
247
self.last_checked_ok = None
306
self.timeout = string_to_delta(config[u"timeout"])
307
self.interval = string_to_delta(config[u"interval"])
308
self.disable_hook = disable_hook
248
self.timeout = string_to_delta(timeout)
249
self.interval = string_to_delta(interval)
250
self.stop_hook = stop_hook
309
251
self.checker = None
310
252
self.checker_initiator_tag = None
311
self.disable_initiator_tag = None
253
self.stop_initiator_tag = None
312
254
self.checker_callback_tag = None
313
self.checker_command = config[u"checker"]
314
self.current_checker_command = None
315
self.last_connect = None
316
317
def enable(self):
255
self.check_command = checker
256
def start(self):
318
257
"""Start this client's checker and timeout hooks"""
319
if getattr(self, u"enabled", False):
320
# Already enabled
321
return
322
self.last_enabled = datetime.datetime.utcnow()
323
258
# Schedule a new checker to be started an 'interval' from now,
324
259
# and every interval from then on.
325
self.checker_initiator_tag = (gobject.timeout_add
326
(self.interval_milliseconds(),
327
self.start_checker))
328
# Schedule a disable() when 'timeout' has passed
329
self.disable_initiator_tag = (gobject.timeout_add
330
(self.timeout_milliseconds(),
331
self.disable))
332
self.enabled = True
260
self.checker_initiator_tag = gobject.timeout_add\
261
(self._interval_milliseconds,
262
self.start_checker)
333
263
# Also start a new checker *right now*.
334
264
self.start_checker()
335
336
def disable(self, quiet=True):
337
"""Disable this client."""
338
if not getattr(self, "enabled", False):
265
# Schedule a stop() when 'timeout' has passed
266
self.stop_initiator_tag = gobject.timeout_add\
267
(self._timeout_milliseconds,
268
self.stop)
269
def stop(self):
270
"""Stop this client.
271
The possibility that a client might be restarted is left open,
272
but not currently used."""
273
# If this client doesn't have a secret, it is already stopped.
274
if self.secret:
275
logger.debug(u"Stopping client %s", self.name)
276
self.secret = None
277
else:
339
278
return False
340
if not quiet:
341
logger.info(u"Disabling client %s", self.name)
342
if getattr(self, u"disable_initiator_tag", False):
343
gobject.source_remove(self.disable_initiator_tag)
344
self.disable_initiator_tag = None
345
if getattr(self, u"checker_initiator_tag", False):
279
if getattr(self, "stop_initiator_tag", False):
280
gobject.source_remove(self.stop_initiator_tag)
281
self.stop_initiator_tag = None
282
if getattr(self, "checker_initiator_tag", False):
346
283
gobject.source_remove(self.checker_initiator_tag)
347
284
self.checker_initiator_tag = None
348
285
self.stop_checker()
349
if self.disable_hook:
350
self.disable_hook(self)
351
self.enabled = False
286
if self.stop_hook:
287
self.stop_hook(self)
352
288
# Do not run this again if called by a gobject.timeout_add
353
289
return False
354
355
290
def __del__(self):
356
self.disable_hook = None
357
self.disable()
358
359
def checker_callback(self, pid, condition, command):
291
self.stop_hook = None
292
self.stop()
293
def checker_callback(self, pid, condition):
360
294
"""The checker has completed, so take appropriate actions."""
295
now = datetime.datetime.now()
361
296
self.checker_callback_tag = None
362
297
self.checker = None
363
if os.WIFEXITED(condition):
364
exitstatus = os.WEXITSTATUS(condition)
365
if exitstatus == 0:
366
logger.info(u"Checker for %(name)s succeeded",
367
vars(self))
368
self.checked_ok()
369
else:
370
logger.info(u"Checker for %(name)s failed",
371
vars(self))
372
else:
298
if os.WIFEXITED(condition) \
299
and (os.WEXITSTATUS(condition) == 0):
300
logger.debug(u"Checker for %(name)s succeeded",
301
vars(self))
302
self.last_checked_ok = now
303
gobject.source_remove(self.stop_initiator_tag)
304
self.stop_initiator_tag = gobject.timeout_add\
305
(self._timeout_milliseconds,
306
self.stop)
307
elif not os.WIFEXITED(condition):
373
308
logger.warning(u"Checker for %(name)s crashed?",
374
309
vars(self))
375
376
def checked_ok(self):
377
"""Bump up the timeout for this client.
378
379
This should only be called when the client has been seen,
380
alive and well.
381
"""
382
self.last_checked_ok = datetime.datetime.utcnow()
383
gobject.source_remove(self.disable_initiator_tag)
384
self.disable_initiator_tag = (gobject.timeout_add
385
(self.timeout_milliseconds(),
386
self.disable))
387
310
else:
311
logger.debug(u"Checker for %(name)s failed",
312
vars(self))
388
313
def start_checker(self):
389
314
"""Start a new checker subprocess if one is not running.
390
391
315
If a checker already exists, leave it running and do
392
316
nothing."""
393
317
# The reason for not killing a running checker is that if we
396
320
# client would inevitably timeout, since no checker would get
397
321
# a chance to run to completion. If we instead leave running
398
322
# checkers alone, the checker would have to take more time
399
# than 'timeout' for the client to be disabled, which is as it
400
# should be.
401
402
# If a checker exists, make sure it is not a zombie
403
try:
404
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
405
except (AttributeError, OSError), error:
406
if (isinstance(error, OSError)
407
and error.errno != errno.ECHILD):
408
raise error
409
else:
410
if pid:
411
logger.warning(u"Checker was a zombie")
412
gobject.source_remove(self.checker_callback_tag)
413
self.checker_callback(pid, status,
414
self.current_checker_command)
415
# Start a new checker if needed
323
# than 'timeout' for the client to be declared invalid, which
324
# is as it should be.
416
325
if self.checker is None:
417
326
try:
418
# In case checker_command has exactly one % operator
419
command = self.checker_command % self.host
327
# In case check_command has exactly one % operator
328
command = self.check_command % self.fqdn
420
329
except TypeError:
421
330
# Escape attributes for the shell
422
escaped_attrs = dict((key,
423
re.escape(unicode(str(val),
424
errors=
425
u'replace')))
331
escaped_attrs = dict((key, re.escape(str(val)))
426
332
for key, val in
427
333
vars(self).iteritems())
428
334
try:
429
command = self.checker_command % escaped_attrs
335
command = self.check_command % escaped_attrs
430
336
except TypeError, error:
431
337
logger.error(u'Could not format string "%s":'
432
u' %s', self.checker_command, error)
338
u' %s', self.check_command, error)
433
339
return True # Try again later
434
self.current_checker_command = command
435
340
try:
436
logger.info(u"Starting checker %r for %s",
437
command, self.name)
438
# We don't need to redirect stdout and stderr, since
439
# in normal mode, that is already done by daemon(),
440
# and in debug mode we don't want to. (Stdin is
441
# always replaced by /dev/null.)
341
logger.debug(u"Starting checker %r for %s",
342
command, self.name)
442
343
self.checker = subprocess.Popen(command,
443
344
close_fds=True,
444
shell=True, cwd=u"/")
445
self.checker_callback_tag = (gobject.child_watch_add
446
(self.checker.pid,
447
self.checker_callback,
448
data=command))
449
# The checker may have completed before the gobject
450
# watch was added. Check for this.
451
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
452
if pid:
453
gobject.source_remove(self.checker_callback_tag)
454
self.checker_callback(pid, status, command)
455
except OSError, error:
345
shell=True, cwd="/")
346
self.checker_callback_tag = gobject.child_watch_add\
347
(self.checker.pid,
348
self.checker_callback)
349
except subprocess.OSError, error:
456
350
logger.error(u"Failed to start subprocess: %s",
457
351
error)
458
352
# Re-run this periodically if run by gobject.timeout_add
459
353
return True
460
461
354
def stop_checker(self):
462
355
"""Force the checker process, if any, to stop."""
463
356
if self.checker_callback_tag:
464
357
gobject.source_remove(self.checker_callback_tag)
465
358
self.checker_callback_tag = None
466
if getattr(self, u"checker", None) is None:
359
if getattr(self, "checker", None) is None:
467
360
return
468
logger.debug(u"Stopping checker for %(name)s", vars(self))
361
logger.debug("Stopping checker for %(name)s", vars(self))
469
362
try:
470
363
os.kill(self.checker.pid, signal.SIGTERM)
471
#time.sleep(0.5)
364
#os.sleep(0.5)
472
365
#if self.checker.poll() is None:
473
366
# os.kill(self.checker.pid, signal.SIGKILL)
474
367
except OSError, error:
475
368
if error.errno != errno.ESRCH: # No such process
476
369
raise
477
370
self.checker = None
478
479
480
def dbus_service_property(dbus_interface, signature=u"v",
481
access=u"readwrite", byte_arrays=False):
482
"""Decorators for marking methods of a DBusObjectWithProperties to
483
become properties on the D-Bus.
484
485
The decorated method will be called with no arguments by "Get"
486
and with one argument by "Set".
487
488
The parameters, where they are supported, are the same as
489
dbus.service.method, except there is only "signature", since the
490
type from Get() and the type sent to Set() is the same.
491
"""
492
# Encoding deeply encoded byte arrays is not supported yet by the
493
# "Set" method, so we fail early here:
494
if byte_arrays and signature != u"ay":
495
raise ValueError(u"Byte arrays not supported for non-'ay'"
496
u" signature %r" % signature)
497
def decorator(func):
498
func._dbus_is_property = True
499
func._dbus_interface = dbus_interface
500
func._dbus_signature = signature
501
func._dbus_access = access
502
func._dbus_name = func.__name__
503
if func._dbus_name.endswith(u"_dbus_property"):
504
func._dbus_name = func._dbus_name[:-14]
505
func._dbus_get_args_options = {u'byte_arrays': byte_arrays }
506
return func
507
return decorator
508
509
510
class DBusPropertyException(dbus.exceptions.DBusException):
511
"""A base class for D-Bus property-related exceptions
512
"""
513
def __unicode__(self):
514
return unicode(str(self))
515
516
517
class DBusPropertyAccessException(DBusPropertyException):
518
"""A property's access permissions disallows an operation.
519
"""
520
pass
521
522
523
class DBusPropertyNotFound(DBusPropertyException):
524
"""An attempt was made to access a non-existing property.
525
"""
526
pass
527
528
529
class DBusObjectWithProperties(dbus.service.Object):
530
"""A D-Bus object with properties.
531
532
Classes inheriting from this can use the dbus_service_property
533
decorator to expose methods as D-Bus properties. It exposes the
534
standard Get(), Set(), and GetAll() methods on the D-Bus.
535
"""
536
537
@staticmethod
538
def _is_dbus_property(obj):
539
return getattr(obj, u"_dbus_is_property", False)
540
541
def _get_all_dbus_properties(self):
542
"""Returns a generator of (name, attribute) pairs
543
"""
544
return ((prop._dbus_name, prop)
545
for name, prop in
546
inspect.getmembers(self, self._is_dbus_property))
547
548
def _get_dbus_property(self, interface_name, property_name):
549
"""Returns a bound method if one exists which is a D-Bus
550
property with the specified name and interface.
551
"""
552
for name in (property_name,
553
property_name + u"_dbus_property"):
554
prop = getattr(self, name, None)
555
if (prop is None
556
or not self._is_dbus_property(prop)
557
or prop._dbus_name != property_name
558
or (interface_name and prop._dbus_interface
559
and interface_name != prop._dbus_interface)):
560
continue
561
return prop
562
# No such property
563
raise DBusPropertyNotFound(self.dbus_object_path + u":"
564
+ interface_name + u"."
565
+ property_name)
566
567
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ss",
568
out_signature=u"v")
569
def Get(self, interface_name, property_name):
570
"""Standard D-Bus property Get() method, see D-Bus standard.
571
"""
572
prop = self._get_dbus_property(interface_name, property_name)
573
if prop._dbus_access == u"write":
574
raise DBusPropertyAccessException(property_name)
575
value = prop()
576
if not hasattr(value, u"variant_level"):
577
return value
578
return type(value)(value, variant_level=value.variant_level+1)
579
580
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ssv")
581
def Set(self, interface_name, property_name, value):
582
"""Standard D-Bus property Set() method, see D-Bus standard.
583
"""
584
prop = self._get_dbus_property(interface_name, property_name)
585
if prop._dbus_access == u"read":
586
raise DBusPropertyAccessException(property_name)
587
if prop._dbus_get_args_options[u"byte_arrays"]:
588
# The byte_arrays option is not supported yet on
589
# signatures other than "ay".
590
if prop._dbus_signature != u"ay":
591
raise ValueError
592
value = dbus.ByteArray(''.join(unichr(byte)
593
for byte in value))
594
prop(value)
595
596
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"s",
597
out_signature=u"a{sv}")
598
def GetAll(self, interface_name):
599
"""Standard D-Bus property GetAll() method, see D-Bus
600
standard.
601
602
Note: Will not include properties with access="write".
603
"""
604
all = {}
605
for name, prop in self._get_all_dbus_properties():
606
if (interface_name
607
and interface_name != prop._dbus_interface):
608
# Interface non-empty but did not match
609
continue
610
# Ignore write-only properties
611
if prop._dbus_access == u"write":
612
continue
613
value = prop()
614
if not hasattr(value, u"variant_level"):
615
all[name] = value
616
continue
617
all[name] = type(value)(value, variant_level=
618
value.variant_level+1)
619
return dbus.Dictionary(all, signature=u"sv")
620
621
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
622
out_signature=u"s",
623
path_keyword='object_path',
624
connection_keyword='connection')
625
def Introspect(self, object_path, connection):
626
"""Standard D-Bus method, overloaded to insert property tags.
627
"""
628
xmlstring = dbus.service.Object.Introspect(self, object_path,
629
connection)
630
try:
631
document = xml.dom.minidom.parseString(xmlstring)
632
def make_tag(document, name, prop):
633
e = document.createElement(u"property")
634
e.setAttribute(u"name", name)
635
e.setAttribute(u"type", prop._dbus_signature)
636
e.setAttribute(u"access", prop._dbus_access)
637
return e
638
for if_tag in document.getElementsByTagName(u"interface"):
639
for tag in (make_tag(document, name, prop)
640
for name, prop
641
in self._get_all_dbus_properties()
642
if prop._dbus_interface
643
== if_tag.getAttribute(u"name")):
644
if_tag.appendChild(tag)
645
# Add the names to the return values for the
646
# "org.freedesktop.DBus.Properties" methods
647
if (if_tag.getAttribute(u"name")
648
== u"org.freedesktop.DBus.Properties"):
649
for cn in if_tag.getElementsByTagName(u"method"):
650
if cn.getAttribute(u"name") == u"Get":
651
for arg in cn.getElementsByTagName(u"arg"):
652
if (arg.getAttribute(u"direction")
653
== u"out"):
654
arg.setAttribute(u"name", u"value")
655
elif cn.getAttribute(u"name") == u"GetAll":
656
for arg in cn.getElementsByTagName(u"arg"):
657
if (arg.getAttribute(u"direction")
658
== u"out"):
659
arg.setAttribute(u"name", u"props")
660
xmlstring = document.toxml(u"utf-8")
661
document.unlink()
662
except (AttributeError, xml.dom.DOMException,
663
xml.parsers.expat.ExpatError), error:
664
logger.error(u"Failed to override Introspection method",
665
error)
666
return xmlstring
667
668
669
class ClientDBus(Client, DBusObjectWithProperties):
670
"""A Client class using D-Bus
671
672
Attributes:
673
dbus_object_path: dbus.ObjectPath
674
bus: dbus.SystemBus()
675
"""
676
# dbus.service.Object doesn't use super(), so we can't either.
677
678
def __init__(self, bus = None, *args, **kwargs):
679
self.bus = bus
680
Client.__init__(self, *args, **kwargs)
681
# Only now, when this client is initialized, can it show up on
682
# the D-Bus
683
self.dbus_object_path = (dbus.ObjectPath
684
(u"/clients/"
685
+ self.name.replace(u".", u"_")))
686
DBusObjectWithProperties.__init__(self, self.bus,
687
self.dbus_object_path)
688
689
@staticmethod
690
def _datetime_to_dbus(dt, variant_level=0):
691
"""Convert a UTC datetime.datetime() to a D-Bus type."""
692
return dbus.String(dt.isoformat(),
693
variant_level=variant_level)
694
695
def enable(self):
696
oldstate = getattr(self, u"enabled", False)
697
r = Client.enable(self)
698
if oldstate != self.enabled:
699
# Emit D-Bus signals
700
self.PropertyChanged(dbus.String(u"enabled"),
701
dbus.Boolean(True, variant_level=1))
702
self.PropertyChanged(
703
dbus.String(u"last_enabled"),
704
self._datetime_to_dbus(self.last_enabled,
705
variant_level=1))
706
return r
707
708
def disable(self, quiet = False):
709
oldstate = getattr(self, u"enabled", False)
710
r = Client.disable(self, quiet=quiet)
711
if not quiet and oldstate != self.enabled:
712
# Emit D-Bus signal
713
self.PropertyChanged(dbus.String(u"enabled"),
714
dbus.Boolean(False, variant_level=1))
715
return r
716
717
def __del__(self, *args, **kwargs):
718
try:
719
self.remove_from_connection()
720
except LookupError:
721
pass
722
if hasattr(DBusObjectWithProperties, u"__del__"):
723
DBusObjectWithProperties.__del__(self, *args, **kwargs)
724
Client.__del__(self, *args, **kwargs)
725
726
def checker_callback(self, pid, condition, command,
727
*args, **kwargs):
728
self.checker_callback_tag = None
729
self.checker = None
730
# Emit D-Bus signal
731
self.PropertyChanged(dbus.String(u"checker_running"),
732
dbus.Boolean(False, variant_level=1))
733
if os.WIFEXITED(condition):
734
exitstatus = os.WEXITSTATUS(condition)
735
# Emit D-Bus signal
736
self.CheckerCompleted(dbus.Int16(exitstatus),
737
dbus.Int64(condition),
738
dbus.String(command))
739
else:
740
# Emit D-Bus signal
741
self.CheckerCompleted(dbus.Int16(-1),
742
dbus.Int64(condition),
743
dbus.String(command))
744
745
return Client.checker_callback(self, pid, condition, command,
746
*args, **kwargs)
747
748
def checked_ok(self, *args, **kwargs):
749
r = Client.checked_ok(self, *args, **kwargs)
750
# Emit D-Bus signal
751
self.PropertyChanged(
752
dbus.String(u"last_checked_ok"),
753
(self._datetime_to_dbus(self.last_checked_ok,
754
variant_level=1)))
755
return r
756
757
def start_checker(self, *args, **kwargs):
758
old_checker = self.checker
759
if self.checker is not None:
760
old_checker_pid = self.checker.pid
761
else:
762
old_checker_pid = None
763
r = Client.start_checker(self, *args, **kwargs)
764
# Only if new checker process was started
765
if (self.checker is not None
766
and old_checker_pid != self.checker.pid):
767
# Emit D-Bus signal
768
self.CheckerStarted(self.current_checker_command)
769
self.PropertyChanged(
770
dbus.String(u"checker_running"),
771
dbus.Boolean(True, variant_level=1))
772
return r
773
774
def stop_checker(self, *args, **kwargs):
775
old_checker = getattr(self, u"checker", None)
776
r = Client.stop_checker(self, *args, **kwargs)
777
if (old_checker is not None
778
and getattr(self, u"checker", None) is None):
779
self.PropertyChanged(dbus.String(u"checker_running"),
780
dbus.Boolean(False, variant_level=1))
781
return r
782
783
## D-Bus methods, signals & properties
784
_interface = u"se.bsnet.fukt.Mandos.Client"
785
786
## Signals
787
788
# CheckerCompleted - signal
789
@dbus.service.signal(_interface, signature=u"nxs")
790
def CheckerCompleted(self, exitcode, waitstatus, command):
791
"D-Bus signal"
792
pass
793
794
# CheckerStarted - signal
795
@dbus.service.signal(_interface, signature=u"s")
796
def CheckerStarted(self, command):
797
"D-Bus signal"
798
pass
799
800
# PropertyChanged - signal
801
@dbus.service.signal(_interface, signature=u"sv")
802
def PropertyChanged(self, property, value):
803
"D-Bus signal"
804
pass
805
806
# GotSecret - signal
807
@dbus.service.signal(_interface)
808
def GotSecret(self):
809
"D-Bus signal"
810
pass
811
812
# Rejected - signal
813
@dbus.service.signal(_interface)
814
def Rejected(self):
815
"D-Bus signal"
816
pass
817
818
## Methods
819
820
# CheckedOK - method
821
@dbus.service.method(_interface)
822
def CheckedOK(self):
823
return self.checked_ok()
824
825
# Enable - method
826
@dbus.service.method(_interface)
827
def Enable(self):
828
"D-Bus method"
829
self.enable()
830
831
# StartChecker - method
832
@dbus.service.method(_interface)
833
def StartChecker(self):
834
"D-Bus method"
835
self.start_checker()
836
837
# Disable - method
838
@dbus.service.method(_interface)
839
def Disable(self):
840
"D-Bus method"
841
self.disable()
842
843
# StopChecker - method
844
@dbus.service.method(_interface)
845
def StopChecker(self):
846
self.stop_checker()
847
848
## Properties
849
850
# name - property
851
@dbus_service_property(_interface, signature=u"s", access=u"read")
852
def name_dbus_property(self):
853
return dbus.String(self.name)
854
855
# fingerprint - property
856
@dbus_service_property(_interface, signature=u"s", access=u"read")
857
def fingerprint_dbus_property(self):
858
return dbus.String(self.fingerprint)
859
860
# host - property
861
@dbus_service_property(_interface, signature=u"s",
862
access=u"readwrite")
863
def host_dbus_property(self, value=None):
864
if value is None: # get
865
return dbus.String(self.host)
866
self.host = value
867
# Emit D-Bus signal
868
self.PropertyChanged(dbus.String(u"host"),
869
dbus.String(value, variant_level=1))
870
871
# created - property
872
@dbus_service_property(_interface, signature=u"s", access=u"read")
873
def created_dbus_property(self):
874
return dbus.String(self._datetime_to_dbus(self.created))
875
876
# last_enabled - property
877
@dbus_service_property(_interface, signature=u"s", access=u"read")
878
def last_enabled_dbus_property(self):
879
if self.last_enabled is None:
880
return dbus.String(u"")
881
return dbus.String(self._datetime_to_dbus(self.last_enabled))
882
883
# enabled - property
884
@dbus_service_property(_interface, signature=u"b",
885
access=u"readwrite")
886
def enabled_dbus_property(self, value=None):
887
if value is None: # get
888
return dbus.Boolean(self.enabled)
889
if value:
890
self.enable()
891
else:
892
self.disable()
893
894
# last_checked_ok - property
895
@dbus_service_property(_interface, signature=u"s",
896
access=u"readwrite")
897
def last_checked_ok_dbus_property(self, value=None):
898
if value is not None:
899
self.checked_ok()
900
return
371
def still_valid(self):
372
"""Has the timeout not yet passed for this client?"""
373
now = datetime.datetime.now()
901
374
if self.last_checked_ok is None:
902
return dbus.String(u"")
903
return dbus.String(self._datetime_to_dbus(self
904
.last_checked_ok))
905
906
# timeout - property
907
@dbus_service_property(_interface, signature=u"t",
908
access=u"readwrite")
909
def timeout_dbus_property(self, value=None):
910
if value is None: # get
911
return dbus.UInt64(self.timeout_milliseconds())
912
self.timeout = datetime.timedelta(0, 0, 0, value)
913
# Emit D-Bus signal
914
self.PropertyChanged(dbus.String(u"timeout"),
915
dbus.UInt64(value, variant_level=1))
916
if getattr(self, u"disable_initiator_tag", None) is None:
917
return
918
# Reschedule timeout
919
gobject.source_remove(self.disable_initiator_tag)
920
self.disable_initiator_tag = None
921
time_to_die = (self.
922
_timedelta_to_milliseconds((self
923
.last_checked_ok
924
+ self.timeout)
925
- datetime.datetime
926
.utcnow()))
927
if time_to_die <= 0:
928
# The timeout has passed
929
self.disable()
930
else:
931
self.disable_initiator_tag = (gobject.timeout_add
932
(time_to_die, self.disable))
933
934
# interval - property
935
@dbus_service_property(_interface, signature=u"t",
936
access=u"readwrite")
937
def interval_dbus_property(self, value=None):
938
if value is None: # get
939
return dbus.UInt64(self.interval_milliseconds())
940
self.interval = datetime.timedelta(0, 0, 0, value)
941
# Emit D-Bus signal
942
self.PropertyChanged(dbus.String(u"interval"),
943
dbus.UInt64(value, variant_level=1))
944
if getattr(self, u"checker_initiator_tag", None) is None:
945
return
946
# Reschedule checker run
947
gobject.source_remove(self.checker_initiator_tag)
948
self.checker_initiator_tag = (gobject.timeout_add
949
(value, self.start_checker))
950
self.start_checker() # Start one now, too
951
952
# checker - property
953
@dbus_service_property(_interface, signature=u"s",
954
access=u"readwrite")
955
def checker_dbus_property(self, value=None):
956
if value is None: # get
957
return dbus.String(self.checker_command)
958
self.checker_command = value
959
# Emit D-Bus signal
960
self.PropertyChanged(dbus.String(u"checker"),
961
dbus.String(self.checker_command,
962
variant_level=1))
963
964
# checker_running - property
965
@dbus_service_property(_interface, signature=u"b",
966
access=u"readwrite")
967
def checker_running_dbus_property(self, value=None):
968
if value is None: # get
969
return dbus.Boolean(self.checker is not None)
970
if value:
971
self.start_checker()
972
else:
973
self.stop_checker()
974
975
# object_path - property
976
@dbus_service_property(_interface, signature=u"o", access=u"read")
977
def object_path_dbus_property(self):
978
return self.dbus_object_path # is already a dbus.ObjectPath
979
980
# secret = property
981
@dbus_service_property(_interface, signature=u"ay",
982
access=u"write", byte_arrays=True)
983
def secret_dbus_property(self, value):
984
self.secret = str(value)
985
986
del _interface
987
988
989
class ClientHandler(socketserver.BaseRequestHandler, object):
990
"""A class to handle client connections.
991
992
Instantiated once for each connection to handle it.
375
return now < (self.created + self.timeout)
376
else:
377
return now < (self.last_checked_ok + self.timeout)
378
379
380
def peer_certificate(session):
381
"Return the peer's OpenPGP certificate as a bytestring"
382
# If not an OpenPGP certificate...
383
if gnutls.library.functions.gnutls_certificate_type_get\
384
(session._c_object) \
385
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP:
386
# ...do the normal thing
387
return session.peer_certificate
388
list_size = ctypes.c_uint()
389
cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
390
(session._c_object, ctypes.byref(list_size))
391
if list_size.value == 0:
392
return None
393
cert = cert_list[0]
394
return ctypes.string_at(cert.data, cert.size)
395
396
397
def fingerprint(openpgp):
398
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
399
# New empty GnuTLS certificate
400
crt = gnutls.library.types.gnutls_openpgp_crt_t()
401
gnutls.library.functions.gnutls_openpgp_crt_init\
402
(ctypes.byref(crt))
403
# New GnuTLS "datum" with the OpenPGP public key
404
datum = gnutls.library.types.gnutls_datum_t\
405
(ctypes.cast(ctypes.c_char_p(openpgp),
406
ctypes.POINTER(ctypes.c_ubyte)),
407
ctypes.c_uint(len(openpgp)))
408
# Import the OpenPGP public key into the certificate
409
ret = gnutls.library.functions.gnutls_openpgp_crt_import\
410
(crt,
411
ctypes.byref(datum),
412
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
413
# New buffer for the fingerprint
414
buffer = ctypes.create_string_buffer(20)
415
buffer_length = ctypes.c_size_t()
416
# Get the fingerprint from the certificate into the buffer
417
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
418
(crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
419
# Deinit the certificate
420
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
421
# Convert the buffer to a Python bytestring
422
fpr = ctypes.string_at(buffer, buffer_length.value)
423
# Convert the bytestring to hexadecimal notation
424
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
425
return hex_fpr
426
427
428
class tcp_handler(SocketServer.BaseRequestHandler, object):
429
"""A TCP request handler class.
430
Instantiated by IPv6_TCPServer for each request to handle it.
993
431
Note: This will run in its own forked process."""
994
432
995
433
def handle(self):
996
logger.info(u"TCP connection from: %s",
997
unicode(self.client_address))
998
logger.debug(u"IPC Pipe FD: %d",
999
self.server.child_pipe[1].fileno())
1000
# Open IPC pipe to parent process
1001
with contextlib.nested(self.server.child_pipe[1],
1002
self.server.parent_pipe[0]
1003
) as (ipc, ipc_return):
1004
session = (gnutls.connection
1005
.ClientSession(self.request,
1006
gnutls.connection
1007
.X509Credentials()))
1008
1009
line = self.request.makefile().readline()
1010
logger.debug(u"Protocol version: %r", line)
1011
try:
1012
if int(line.strip().split()[0]) > 1:
1013
raise RuntimeError
1014
except (ValueError, IndexError, RuntimeError), error:
1015
logger.error(u"Unknown protocol version: %s", error)
1016
return
1017
1018
# Note: gnutls.connection.X509Credentials is really a
1019
# generic GnuTLS certificate credentials object so long as
1020
# no X.509 keys are added to it. Therefore, we can use it
1021
# here despite using OpenPGP certificates.
1022
1023
#priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
1024
# u"+AES-256-CBC", u"+SHA1",
1025
# u"+COMP-NULL", u"+CTYPE-OPENPGP",
1026
# u"+DHE-DSS"))
1027
# Use a fallback default, since this MUST be set.
1028
priority = self.server.gnutls_priority
1029
if priority is None:
1030
priority = u"NORMAL"
1031
(gnutls.library.functions
1032
.gnutls_priority_set_direct(session._c_object,
1033
priority, None))
1034
1035
try:
1036
session.handshake()
1037
except gnutls.errors.GNUTLSError, error:
1038
logger.warning(u"Handshake failed: %s", error)
1039
# Do not run session.bye() here: the session is not
1040
# established. Just abandon the request.
1041
return
1042
logger.debug(u"Handshake succeeded")
1043
try:
1044
try:
1045
fpr = self.fingerprint(self.peer_certificate
1046
(session))
1047
except (TypeError, gnutls.errors.GNUTLSError), error:
1048
logger.warning(u"Bad certificate: %s", error)
1049
return
1050
logger.debug(u"Fingerprint: %s", fpr)
1051
1052
for c in self.server.clients:
1053
if c.fingerprint == fpr:
1054
client = c
1055
break
1056
else:
1057
ipc.write(u"NOTFOUND %s %s\n"
1058
% (fpr, unicode(self.client_address)))
1059
return
1060
# Have to check if client.enabled, since it is
1061
# possible that the client was disabled since the
1062
# GnuTLS session was established.
1063
ipc.write(u"GETATTR enabled %s\n" % fpr)
1064
enabled = pickle.load(ipc_return)
1065
if not enabled:
1066
ipc.write(u"DISABLED %s\n" % client.name)
1067
return
1068
ipc.write(u"SENDING %s\n" % client.name)
1069
sent_size = 0
1070
while sent_size < len(client.secret):
1071
sent = session.send(client.secret[sent_size:])
1072
logger.debug(u"Sent: %d, remaining: %d",
1073
sent, len(client.secret)
1074
- (sent_size + sent))
1075
sent_size += sent
1076
finally:
1077
session.bye()
1078
1079
@staticmethod
1080
def peer_certificate(session):
1081
"Return the peer's OpenPGP certificate as a bytestring"
1082
# If not an OpenPGP certificate...
1083
if (gnutls.library.functions
1084
.gnutls_certificate_type_get(session._c_object)
1085
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1086
# ...do the normal thing
1087
return session.peer_certificate
1088
list_size = ctypes.c_uint(1)
1089
cert_list = (gnutls.library.functions
1090
.gnutls_certificate_get_peers
1091
(session._c_object, ctypes.byref(list_size)))
1092
if not bool(cert_list) and list_size.value != 0:
1093
raise gnutls.errors.GNUTLSError(u"error getting peer"
1094
u" certificate")
1095
if list_size.value == 0:
1096
return None
1097
cert = cert_list[0]
1098
return ctypes.string_at(cert.data, cert.size)
1099
1100
@staticmethod
1101
def fingerprint(openpgp):
1102
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1103
# New GnuTLS "datum" with the OpenPGP public key
1104
datum = (gnutls.library.types
1105
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1106
ctypes.POINTER
1107
(ctypes.c_ubyte)),
1108
ctypes.c_uint(len(openpgp))))
1109
# New empty GnuTLS certificate
1110
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1111
(gnutls.library.functions
1112
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1113
# Import the OpenPGP public key into the certificate
1114
(gnutls.library.functions
1115
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1116
gnutls.library.constants
1117
.GNUTLS_OPENPGP_FMT_RAW))
1118
# Verify the self signature in the key
1119
crtverify = ctypes.c_uint()
1120
(gnutls.library.functions
1121
.gnutls_openpgp_crt_verify_self(crt, 0,
1122
ctypes.byref(crtverify)))
1123
if crtverify.value != 0:
1124
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1125
raise (gnutls.errors.CertificateSecurityError
1126
(u"Verify failed"))
1127
# New buffer for the fingerprint
1128
buf = ctypes.create_string_buffer(20)
1129
buf_len = ctypes.c_size_t()
1130
# Get the fingerprint from the certificate into the buffer
1131
(gnutls.library.functions
1132
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1133
ctypes.byref(buf_len)))
1134
# Deinit the certificate
1135
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1136
# Convert the buffer to a Python bytestring
1137
fpr = ctypes.string_at(buf, buf_len.value)
1138
# Convert the bytestring to hexadecimal notation
1139
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
1140
return hex_fpr
1141
1142
1143
class ForkingMixInWithPipes(socketserver.ForkingMixIn, object):
1144
"""Like socketserver.ForkingMixIn, but also pass a pipe pair."""
1145
def process_request(self, request, client_address):
1146
"""Overrides and wraps the original process_request().
1147
1148
This function creates a new pipe in self.pipe
1149
"""
1150
# Child writes to child_pipe
1151
self.child_pipe = map(os.fdopen, os.pipe(), u"rw", (1, 0))
1152
# Parent writes to parent_pipe
1153
self.parent_pipe = map(os.fdopen, os.pipe(), u"rw", (1, 0))
1154
super(ForkingMixInWithPipes,
1155
self).process_request(request, client_address)
1156
# Close unused ends for parent
1157
self.parent_pipe[0].close() # close read end
1158
self.child_pipe[1].close() # close write end
1159
self.add_pipe_fds(self.child_pipe[0], self.parent_pipe[1])
1160
def add_pipe_fds(self, child_pipe_fd, parent_pipe_fd):
1161
"""Dummy function; override as necessary"""
1162
child_pipe_fd.close()
1163
parent_pipe_fd.close()
1164
1165
1166
class IPv6_TCPServer(ForkingMixInWithPipes,
1167
socketserver.TCPServer, object):
1168
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1169
434
logger.debug(u"TCP connection from: %s",
435
unicode(self.client_address))
436
session = gnutls.connection.ClientSession\
437
(self.request, gnutls.connection.X509Credentials())
438
439
line = self.request.makefile().readline()
440
logger.debug(u"Protocol version: %r", line)
441
try:
442
if int(line.strip().split()[0]) > 1:
443
raise RuntimeError
444
except (ValueError, IndexError, RuntimeError), error:
445
logger.error(u"Unknown protocol version: %s", error)
446
return
447
448
# Note: gnutls.connection.X509Credentials is really a generic
449
# GnuTLS certificate credentials object so long as no X.509
450
# keys are added to it. Therefore, we can use it here despite
451
# using OpenPGP certificates.
452
453
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
454
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
455
# "+DHE-DSS"))
456
priority = "NORMAL" # Fallback default, since this
457
# MUST be set.
458
if self.server.settings["priority"]:
459
priority = self.server.settings["priority"]
460
gnutls.library.functions.gnutls_priority_set_direct\
461
(session._c_object, priority, None);
462
463
try:
464
session.handshake()
465
except gnutls.errors.GNUTLSError, error:
466
logger.debug(u"Handshake failed: %s", error)
467
# Do not run session.bye() here: the session is not
468
# established. Just abandon the request.
469
return
470
try:
471
fpr = fingerprint(peer_certificate(session))
472
except (TypeError, gnutls.errors.GNUTLSError), error:
473
logger.debug(u"Bad certificate: %s", error)
474
session.bye()
475
return
476
logger.debug(u"Fingerprint: %s", fpr)
477
client = None
478
for c in self.server.clients:
479
if c.fingerprint == fpr:
480
client = c
481
break
482
if not client:
483
logger.debug(u"Client not found for fingerprint: %s", fpr)
484
session.bye()
485
return
486
# Have to check if client.still_valid(), since it is possible
487
# that the client timed out while establishing the GnuTLS
488
# session.
489
if not client.still_valid():
490
logger.debug(u"Client %(name)s is invalid", vars(client))
491
session.bye()
492
return
493
sent_size = 0
494
while sent_size < len(client.secret):
495
sent = session.send(client.secret[sent_size:])
496
logger.debug(u"Sent: %d, remaining: %d",
497
sent, len(client.secret)
498
- (sent_size + sent))
499
sent_size += sent
500
session.bye()
501
502
503
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
504
"""IPv6 TCP server. Accepts 'None' as address and/or port.
1170
505
Attributes:
1171
enabled: Boolean; whether this server is activated yet
1172
interface: None or a network interface name (string)
1173
use_ipv6: Boolean; to use IPv6 or not
506
settings: Server settings
507
clients: Set() of Client objects
1174
508
"""
1175
def __init__(self, server_address, RequestHandlerClass,
1176
interface=None, use_ipv6=True):
1177
self.interface = interface
1178
if use_ipv6:
1179
self.address_family = socket.AF_INET6
1180
socketserver.TCPServer.__init__(self, server_address,
1181
RequestHandlerClass)
509
address_family = socket.AF_INET6
510
def __init__(self, *args, **kwargs):
511
if "settings" in kwargs:
512
self.settings = kwargs["settings"]
513
del kwargs["settings"]
514
if "clients" in kwargs:
515
self.clients = kwargs["clients"]
516
del kwargs["clients"]
517
return super(type(self), self).__init__(*args, **kwargs)
1182
518
def server_bind(self):
1183
519
"""This overrides the normal server_bind() function
1184
520
to bind to an interface if one was specified, and also NOT to
1185
521
bind to an address or port if they were not specified."""
1186
if self.interface is not None:
1187
if SO_BINDTODEVICE is None:
1188
logger.error(u"SO_BINDTODEVICE does not exist;"
1189
u" cannot bind to interface %s",
1190
self.interface)
1191
else:
1192
try:
1193
self.socket.setsockopt(socket.SOL_SOCKET,
1194
SO_BINDTODEVICE,
1195
str(self.interface
1196
+ u'\0'))
1197
except socket.error, error:
1198
if error[0] == errno.EPERM:
1199
logger.error(u"No permission to"
1200
u" bind to interface %s",
1201
self.interface)
1202
elif error[0] == errno.ENOPROTOOPT:
1203
logger.error(u"SO_BINDTODEVICE not available;"
1204
u" cannot bind to interface %s",
1205
self.interface)
1206
else:
1207
raise
522
if self.settings["interface"]:
523
# 25 is from /usr/include/asm-i486/socket.h
524
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
525
try:
526
self.socket.setsockopt(socket.SOL_SOCKET,
527
SO_BINDTODEVICE,
528
self.settings["interface"])
529
except socket.error, error:
530
if error[0] == errno.EPERM:
531
logger.warning(u"No permission to"
532
u" bind to interface %s",
533
self.settings["interface"])
534
else:
535
raise error
1208
536
# Only bind(2) the socket if we really need to.
1209
537
if self.server_address[0] or self.server_address[1]:
1210
538
if not self.server_address[0]:
1211
if self.address_family == socket.AF_INET6:
1212
any_address = u"::" # in6addr_any
1213
else:
1214
any_address = socket.INADDR_ANY
1215
self.server_address = (any_address,
539
in6addr_any = "::"
540
self.server_address = (in6addr_any,
1216
541
self.server_address[1])
1217
elif not self.server_address[1]:
542
elif self.server_address[1] is None:
1218
543
self.server_address = (self.server_address[0],
1219
544
0)
1220
# if self.interface:
1221
# self.server_address = (self.server_address[0],
1222
# 0, # port
1223
# 0, # flowinfo
1224
# if_nametoindex
1225
# (self.interface))
1226
return socketserver.TCPServer.server_bind(self)
1227
1228
1229
class MandosServer(IPv6_TCPServer):
1230
"""Mandos server.
1231
1232
Attributes:
1233
clients: set of Client objects
1234
gnutls_priority GnuTLS priority string
1235
use_dbus: Boolean; to emit D-Bus signals or not
1236
1237
Assumes a gobject.MainLoop event loop.
1238
"""
1239
def __init__(self, server_address, RequestHandlerClass,
1240
interface=None, use_ipv6=True, clients=None,
1241
gnutls_priority=None, use_dbus=True):
1242
self.enabled = False
1243
self.clients = clients
1244
if self.clients is None:
1245
self.clients = set()
1246
self.use_dbus = use_dbus
1247
self.gnutls_priority = gnutls_priority
1248
IPv6_TCPServer.__init__(self, server_address,
1249
RequestHandlerClass,
1250
interface = interface,
1251
use_ipv6 = use_ipv6)
1252
def server_activate(self):
1253
if self.enabled:
1254
return socketserver.TCPServer.server_activate(self)
1255
def enable(self):
1256
self.enabled = True
1257
def add_pipe_fds(self, child_pipe_fd, parent_pipe_fd):
1258
# Call "handle_ipc" for both data and EOF events
1259
gobject.io_add_watch(child_pipe_fd.fileno(),
1260
gobject.IO_IN | gobject.IO_HUP,
1261
functools.partial(self.handle_ipc,
1262
reply = parent_pipe_fd,
1263
sender= child_pipe_fd))
1264
def handle_ipc(self, source, condition, reply=None, sender=None):
1265
condition_names = {
1266
gobject.IO_IN: u"IN", # There is data to read.
1267
gobject.IO_OUT: u"OUT", # Data can be written (without
1268
# blocking).
1269
gobject.IO_PRI: u"PRI", # There is urgent data to read.
1270
gobject.IO_ERR: u"ERR", # Error condition.
1271
gobject.IO_HUP: u"HUP" # Hung up (the connection has been
1272
# broken, usually for pipes and
1273
# sockets).
1274
}
1275
conditions_string = ' | '.join(name
1276
for cond, name in
1277
condition_names.iteritems()
1278
if cond & condition)
1279
logger.debug(u"Handling IPC: FD = %d, condition = %s", source,
1280
conditions_string)
1281
1282
# Read a line from the file object
1283
cmdline = sender.readline()
1284
if not cmdline: # Empty line means end of file
1285
# close the IPC pipes
1286
sender.close()
1287
reply.close()
1288
1289
# Stop calling this function
1290
return False
1291
1292
logger.debug(u"IPC command: %r", cmdline)
1293
1294
# Parse and act on command
1295
cmd, args = cmdline.rstrip(u"\r\n").split(None, 1)
1296
1297
if cmd == u"NOTFOUND":
1298
fpr, address = args.split(None, 1)
1299
logger.warning(u"Client not found for fingerprint: %s, ad"
1300
u"dress: %s", fpr, address)
1301
if self.use_dbus:
1302
# Emit D-Bus signal
1303
mandos_dbus_service.ClientNotFound(fpr, address)
1304
elif cmd == u"DISABLED":
1305
for client in self.clients:
1306
if client.name == args:
1307
logger.warning(u"Client %s is disabled", args)
1308
if self.use_dbus:
1309
# Emit D-Bus signal
1310
client.Rejected()
1311
break
1312
else:
1313
logger.error(u"Unknown client %s is disabled", args)
1314
elif cmd == u"SENDING":
1315
for client in self.clients:
1316
if client.name == args:
1317
logger.info(u"Sending secret to %s", client.name)
1318
client.checked_ok()
1319
if self.use_dbus:
1320
# Emit D-Bus signal
1321
client.GotSecret()
1322
break
1323
else:
1324
logger.error(u"Sending secret to unknown client %s",
1325
args)
1326
elif cmd == u"GETATTR":
1327
attr_name, fpr = args.split(None, 1)
1328
for client in self.clients:
1329
if client.fingerprint == fpr:
1330
attr_value = getattr(client, attr_name, None)
1331
logger.debug("IPC reply: %r", attr_value)
1332
pickle.dump(attr_value, reply)
1333
break
1334
else:
1335
logger.error(u"Client %s on address %s requesting "
1336
u"attribute %s not found", fpr, address,
1337
attr_name)
1338
pickle.dump(None, reply)
1339
else:
1340
logger.error(u"Unknown IPC command: %r", cmdline)
1341
1342
# Keep calling this function
1343
return True
545
return super(type(self), self).server_bind()
1344
546
1345
547
1346
548
def string_to_delta(interval):
1347
549
"""Parse a string and return a datetime.timedelta
1348
1349
>>> string_to_delta(u'7d')
550
551
>>> string_to_delta('7d')
1350
552
datetime.timedelta(7)
1351
>>> string_to_delta(u'60s')
553
>>> string_to_delta('60s')
1352
554
datetime.timedelta(0, 60)
1353
>>> string_to_delta(u'60m')
555
>>> string_to_delta('60m')
1354
556
datetime.timedelta(0, 3600)
1355
>>> string_to_delta(u'24h')
557
>>> string_to_delta('24h')
1356
558
datetime.timedelta(1)
1357
559
>>> string_to_delta(u'1w')
1358
560
datetime.timedelta(7)
1359
>>> string_to_delta(u'5m 30s')
1360
datetime.timedelta(0, 330)
1361
561
"""
1362
timevalue = datetime.timedelta(0)
1363
for s in interval.split():
1364
try:
1365
suffix = unicode(s[-1])
1366
value = int(s[:-1])
1367
if suffix == u"d":
1368
delta = datetime.timedelta(value)
1369
elif suffix == u"s":
1370
delta = datetime.timedelta(0, value)
1371
elif suffix == u"m":
1372
delta = datetime.timedelta(0, 0, 0, 0, value)
1373
elif suffix == u"h":
1374
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
1375
elif suffix == u"w":
1376
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1377
else:
1378
raise ValueError(u"Unknown suffix %r" % suffix)
1379
except (ValueError, IndexError), e:
1380
raise ValueError(e.message)
1381
timevalue += delta
1382
return timevalue
1383
562
try:
563
suffix=unicode(interval[-1])
564
value=int(interval[:-1])
565
if suffix == u"d":
566
delta = datetime.timedelta(value)
567
elif suffix == u"s":
568
delta = datetime.timedelta(0, value)
569
elif suffix == u"m":
570
delta = datetime.timedelta(0, 0, 0, 0, value)
571
elif suffix == u"h":
572
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
573
elif suffix == u"w":
574
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
575
else:
576
raise ValueError
577
except (ValueError, IndexError):
578
raise ValueError
579
return delta
580
581
582
def server_state_changed(state):
583
"""Derived from the Avahi example code"""
584
if state == avahi.SERVER_COLLISION:
585
logger.warning(u"Server name collision")
586
service.remove()
587
elif state == avahi.SERVER_RUNNING:
588
service.add()
589
590
591
def entry_group_state_changed(state, error):
592
"""Derived from the Avahi example code"""
593
logger.debug(u"state change: %i", state)
594
595
if state == avahi.ENTRY_GROUP_ESTABLISHED:
596
logger.debug(u"Service established.")
597
elif state == avahi.ENTRY_GROUP_COLLISION:
598
logger.warning(u"Service name collision.")
599
service.rename()
600
elif state == avahi.ENTRY_GROUP_FAILURE:
601
logger.critical(u"Error in group state changed %s",
602
unicode(error))
603
raise AvahiGroupError("State changed: %s", str(error))
1384
604
1385
605
def if_nametoindex(interface):
1386
"""Call the C function if_nametoindex(), or equivalent
1387
1388
Note: This function cannot accept a unicode string."""
606
"""Call the C function if_nametoindex(), or equivalent"""
1389
607
global if_nametoindex
1390
608
try:
1391
if_nametoindex = (ctypes.cdll.LoadLibrary
1392
(ctypes.util.find_library(u"c"))
1393
.if_nametoindex)
609
if "ctypes.util" not in sys.modules:
610
import ctypes.util
611
if_nametoindex = ctypes.cdll.LoadLibrary\
612
(ctypes.util.find_library("c")).if_nametoindex
1394
613
except (OSError, AttributeError):
1395
logger.warning(u"Doing if_nametoindex the hard way")
614
if "struct" not in sys.modules:
615
import struct
616
if "fcntl" not in sys.modules:
617
import fcntl
1396
618
def if_nametoindex(interface):
1397
619
"Get an interface index the hard way, i.e. using fcntl()"
1398
620
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1399
with contextlib.closing(socket.socket()) as s:
1400
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1401
struct.pack(str(u"16s16x"),
1402
interface))
1403
interface_index = struct.unpack(str(u"I"),
1404
ifreq[16:20])[0]
621
s = socket.socket()
622
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
623
struct.pack("16s16x", interface))
624
s.close()
625
interface_index = struct.unpack("I", ifreq[16:20])[0]
1405
626
return interface_index
1406
627
return if_nametoindex(interface)
1407
628
1408
629
1409
def daemon(nochdir = False, noclose = False):
630
def daemon(nochdir, noclose):
1410
631
"""See daemon(3). Standard BSD Unix function.
1411
1412
632
This should really exist as os.daemon, but it doesn't (yet)."""
1413
633
if os.fork():
1414
634
sys.exit()
1415
635
os.setsid()
1416
636
if not nochdir:
1417
os.chdir(u"/")
1418
if os.fork():
1419
sys.exit()
637
os.chdir("/")
1420
638
if not noclose:
1421
639
# Close all standard open file descriptors
1422
640
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1423
641
if not stat.S_ISCHR(os.fstat(null).st_mode):
1424
642
raise OSError(errno.ENODEV,
1425
u"%s not a character device"
1426
% os.path.devnull)
643
"/dev/null not a character device")
1427
644
os.dup2(null, sys.stdin.fileno())
1428
645
os.dup2(null, sys.stdout.fileno())
1429
646
os.dup2(null, sys.stderr.fileno())
1432
649
1433
650
1434
651
def main():
1435
1436
##################################################################
1437
# Parsing of options, both command line and config file
1438
1439
parser = optparse.OptionParser(version = "%%prog %s" % version)
1440
parser.add_option("-i", u"--interface", type=u"string",
1441
metavar="IF", help=u"Bind to interface IF")
1442
parser.add_option("-a", u"--address", type=u"string",
1443
help=u"Address to listen for requests on")
1444
parser.add_option("-p", u"--port", type=u"int",
1445
help=u"Port number to receive requests on")
1446
parser.add_option("--check", action=u"store_true",
1447
help=u"Run self-test")
1448
parser.add_option("--debug", action=u"store_true",
1449
help=u"Debug mode; run in foreground and log to"
1450
u" terminal")
1451
parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1452
u" priority string (see GnuTLS documentation)")
1453
parser.add_option("--servicename", type=u"string",
1454
metavar=u"NAME", help=u"Zeroconf service name")
1455
parser.add_option("--configdir", type=u"string",
1456
default=u"/etc/mandos", metavar=u"DIR",
1457
help=u"Directory to search for configuration"
1458
u" files")
1459
parser.add_option("--no-dbus", action=u"store_false",
1460
dest=u"use_dbus", help=u"Do not provide D-Bus"
1461
u" system bus interface")
1462
parser.add_option("--no-ipv6", action=u"store_false",
1463
dest=u"use_ipv6", help=u"Do not use IPv6")
1464
options = parser.parse_args()[0]
652
global main_loop_started
653
main_loop_started = False
654
655
parser = OptionParser()
656
parser.add_option("-i", "--interface", type="string",
657
metavar="IF", help="Bind to interface IF")
658
parser.add_option("-a", "--address", type="string",
659
help="Address to listen for requests on")
660
parser.add_option("-p", "--port", type="int",
661
help="Port number to receive requests on")
662
parser.add_option("--check", action="store_true", default=False,
663
help="Run self-test")
664
parser.add_option("--debug", action="store_true", default=False,
665
help="Debug mode; run in foreground and log to"
666
" terminal")
667
parser.add_option("--priority", type="string", help="GnuTLS"
668
" priority string (see GnuTLS documentation)")
669
parser.add_option("--servicename", type="string", metavar="NAME",
670
help="Zeroconf service name")
671
parser.add_option("--configdir", type="string",
672
default="/etc/mandos", metavar="DIR",
673
help="Directory to search for configuration"
674
" files")
675
(options, args) = parser.parse_args()
1465
676
1466
677
if options.check:
1467
678
import doctest
1469
680
sys.exit()
1470
681
1471
682
# Default values for config file for server-global settings
1472
server_defaults = { u"interface": u"",
1473
u"address": u"",
1474
u"port": u"",
1475
u"debug": u"False",
1476
u"priority":
1477
u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1478
u"servicename": u"Mandos",
1479
u"use_dbus": u"True",
1480
u"use_ipv6": u"True",
683
server_defaults = { "interface": "",
684
"address": "",
685
"port": "",
686
"debug": "False",
687
"priority":
688
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
689
"servicename": "Mandos",
1481
690
}
1482
691
1483
692
# Parse config file for server-global settings
1484
server_config = configparser.SafeConfigParser(server_defaults)
693
server_config = ConfigParser.SafeConfigParser(server_defaults)
1485
694
del server_defaults
1486
server_config.read(os.path.join(options.configdir,
1487
u"mandos.conf"))
695
server_config.read(os.path.join(options.configdir, "server.conf"))
696
server_section = "server"
1488
697
# Convert the SafeConfigParser object to a dict
1489
server_settings = server_config.defaults()
1490
# Use the appropriate methods on the non-string config options
1491
for option in (u"debug", u"use_dbus", u"use_ipv6"):
1492
server_settings[option] = server_config.getboolean(u"DEFAULT",
1493
option)
1494
if server_settings["port"]:
1495
server_settings["port"] = server_config.getint(u"DEFAULT",
1496
u"port")
698
server_settings = dict(server_config.items(server_section))
699
# Use getboolean on the boolean config option
700
server_settings["debug"] = server_config.getboolean\
701
(server_section, "debug")
1497
702
del server_config
1498
703
1499
704
# Override the settings from the config file with command line
1500
705
# options, if set.
1501
for option in (u"interface", u"address", u"port", u"debug",
1502
u"priority", u"servicename", u"configdir",
1503
u"use_dbus", u"use_ipv6"):
706
for option in ("interface", "address", "port", "debug",
707
"priority", "servicename", "configdir"):
1504
708
value = getattr(options, option)
1505
709
if value is not None:
1506
710
server_settings[option] = value
1507
711
del options
1508
# Force all strings to be unicode
1509
for option in server_settings.keys():
1510
if type(server_settings[option]) is str:
1511
server_settings[option] = unicode(server_settings[option])
1512
712
# Now we have our good server settings in "server_settings"
1513
713
1514
##################################################################
1515
1516
# For convenience
1517
debug = server_settings[u"debug"]
1518
use_dbus = server_settings[u"use_dbus"]
1519
use_ipv6 = server_settings[u"use_ipv6"]
1520
1521
if not debug:
1522
syslogger.setLevel(logging.WARNING)
1523
console.setLevel(logging.WARNING)
1524
1525
if server_settings[u"servicename"] != u"Mandos":
1526
syslogger.setFormatter(logging.Formatter
1527
(u'Mandos (%s) [%%(process)d]:'
1528
u' %%(levelname)s: %%(message)s'
1529
% server_settings[u"servicename"]))
1530
1531
714
# Parse config file with clients
1532
client_defaults = { u"timeout": u"1h",
1533
u"interval": u"5m",
1534
u"checker": u"fping -q -- %%(host)s",
1535
u"host": u"",
715
client_defaults = { "timeout": "1h",
716
"interval": "5m",
717
"checker": "fping -q -- %%(fqdn)s",
1536
718
}
1537
client_config = configparser.SafeConfigParser(client_defaults)
1538
client_config.read(os.path.join(server_settings[u"configdir"],
1539
u"clients.conf"))
1540
1541
global mandos_dbus_service
1542
mandos_dbus_service = None
1543
1544
tcp_server = MandosServer((server_settings[u"address"],
1545
server_settings[u"port"]),
1546
ClientHandler,
1547
interface=server_settings[u"interface"],
1548
use_ipv6=use_ipv6,
1549
gnutls_priority=
1550
server_settings[u"priority"],
1551
use_dbus=use_dbus)
1552
pidfilename = u"/var/run/mandos.pid"
1553
try:
1554
pidfile = open(pidfilename, u"w")
1555
except IOError:
1556
logger.error(u"Could not open file %r", pidfilename)
1557
1558
try:
1559
uid = pwd.getpwnam(u"_mandos").pw_uid
1560
gid = pwd.getpwnam(u"_mandos").pw_gid
1561
except KeyError:
1562
try:
1563
uid = pwd.getpwnam(u"mandos").pw_uid
1564
gid = pwd.getpwnam(u"mandos").pw_gid
1565
except KeyError:
1566
try:
1567
uid = pwd.getpwnam(u"nobody").pw_uid
1568
gid = pwd.getpwnam(u"nobody").pw_gid
1569
except KeyError:
1570
uid = 65534
1571
gid = 65534
1572
try:
1573
os.setgid(gid)
1574
os.setuid(uid)
1575
except OSError, error:
1576
if error[0] != errno.EPERM:
1577
raise error
1578
1579
# Enable all possible GnuTLS debugging
1580
if debug:
1581
# "Use a log level over 10 to enable all debugging options."
1582
# - GnuTLS manual
1583
gnutls.library.functions.gnutls_global_set_log_level(11)
1584
1585
@gnutls.library.types.gnutls_log_func
1586
def debug_gnutls(level, string):
1587
logger.debug(u"GnuTLS: %s", string[:-1])
1588
1589
(gnutls.library.functions
1590
.gnutls_global_set_log_function(debug_gnutls))
719
client_config = ConfigParser.SafeConfigParser(client_defaults)
720
client_config.read(os.path.join(server_settings["configdir"],
721
"clients.conf"))
722
723
global service
724
service = AvahiService(name = server_settings["servicename"],
725
type = "_mandos._tcp", );
726
if server_settings["interface"]:
727
service.interface = if_nametoindex(server_settings["interface"])
1591
728
1592
729
global main_loop
730
global bus
731
global server
1593
732
# From the Avahi example code
1594
733
DBusGMainLoop(set_as_default=True )
1595
734
main_loop = gobject.MainLoop()
1596
735
bus = dbus.SystemBus()
736
server = dbus.Interface(
737
bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
738
avahi.DBUS_INTERFACE_SERVER )
1597
739
# End of Avahi example code
1598
if use_dbus:
1599
try:
1600
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos",
1601
bus, do_not_queue=True)
1602
except dbus.exceptions.NameExistsException, e:
1603
logger.error(unicode(e) + u", disabling D-Bus")
1604
use_dbus = False
1605
server_settings[u"use_dbus"] = False
1606
tcp_server.use_dbus = False
1607
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1608
service = AvahiService(name = server_settings[u"servicename"],
1609
servicetype = u"_mandos._tcp",
1610
protocol = protocol, bus = bus)
1611
if server_settings["interface"]:
1612
service.interface = (if_nametoindex
1613
(str(server_settings[u"interface"])))
1614
740
1615
client_class = Client
1616
if use_dbus:
1617
client_class = functools.partial(ClientDBus, bus = bus)
1618
tcp_server.clients.update(set(
1619
client_class(name = section,
1620
config= dict(client_config.items(section)))
1621
for section in client_config.sections()))
1622
if not tcp_server.clients:
1623
logger.warning(u"No clients defined")
741
debug = server_settings["debug"]
1624
742
1625
743
if debug:
1626
# Redirect stdin so all checkers get /dev/null
1627
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1628
os.dup2(null, sys.stdin.fileno())
1629
if null > 2:
1630
os.close(null)
1631
else:
1632
# No console logging
1633
logger.removeHandler(console)
1634
# Close all input and output, do double fork, etc.
1635
daemon()
1636
1637
try:
1638
with pidfile:
1639
pid = os.getpid()
1640
pidfile.write(str(pid) + "\n")
1641
del pidfile
1642
except IOError:
1643
logger.error(u"Could not write to file %r with PID %d",
1644
pidfilename, pid)
1645
except NameError:
1646
# "pidfile" was never created
1647
pass
1648
del pidfilename
744
console = logging.StreamHandler()
745
# console.setLevel(logging.DEBUG)
746
console.setFormatter(logging.Formatter\
747
('%(levelname)s: %(message)s'))
748
logger.addHandler(console)
749
del console
750
751
clients = Set()
752
def remove_from_clients(client):
753
clients.remove(client)
754
if not clients:
755
logger.debug(u"No clients left, exiting")
756
sys.exit()
757
758
clients.update(Set(Client(name=section,
759
stop_hook = remove_from_clients,
760
**(dict(client_config\
761
.items(section))))
762
for section in client_config.sections()))
763
764
if not debug:
765
daemon(False, False)
766
767
def cleanup():
768
"Cleanup function; run on exit"
769
global group
770
# From the Avahi example code
771
if not group is None:
772
group.Free()
773
group = None
774
# End of Avahi example code
775
776
while clients:
777
client = clients.pop()
778
client.stop_hook = None
779
client.stop()
780
781
atexit.register(cleanup)
1649
782
1650
783
if not debug:
1651
784
signal.signal(signal.SIGINT, signal.SIG_IGN)
1652
785
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1653
786
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1654
787
1655
if use_dbus:
1656
class MandosDBusService(dbus.service.Object):
1657
"""A D-Bus proxy object"""
1658
def __init__(self):
1659
dbus.service.Object.__init__(self, bus, u"/")
1660
_interface = u"se.bsnet.fukt.Mandos"
1661
1662
@dbus.service.signal(_interface, signature=u"o")
1663
def ClientAdded(self, objpath):
1664
"D-Bus signal"
1665
pass
1666
1667
@dbus.service.signal(_interface, signature=u"ss")
1668
def ClientNotFound(self, fingerprint, address):
1669
"D-Bus signal"
1670
pass
1671
1672
@dbus.service.signal(_interface, signature=u"os")
1673
def ClientRemoved(self, objpath, name):
1674
"D-Bus signal"
1675
pass
1676
1677
@dbus.service.method(_interface, out_signature=u"ao")
1678
def GetAllClients(self):
1679
"D-Bus method"
1680
return dbus.Array(c.dbus_object_path
1681
for c in tcp_server.clients)
1682
1683
@dbus.service.method(_interface,
1684
out_signature=u"a{oa{sv}}")
1685
def GetAllClientsWithProperties(self):
1686
"D-Bus method"
1687
return dbus.Dictionary(
1688
((c.dbus_object_path, c.GetAll(u""))
1689
for c in tcp_server.clients),
1690
signature=u"oa{sv}")
1691
1692
@dbus.service.method(_interface, in_signature=u"o")
1693
def RemoveClient(self, object_path):
1694
"D-Bus method"
1695
for c in tcp_server.clients:
1696
if c.dbus_object_path == object_path:
1697
tcp_server.clients.remove(c)
1698
c.remove_from_connection()
1699
# Don't signal anything except ClientRemoved
1700
c.disable(quiet=True)
1701
# Emit D-Bus signal
1702
self.ClientRemoved(object_path, c.name)
1703
return
1704
raise KeyError(object_path)
1705
1706
del _interface
1707
1708
mandos_dbus_service = MandosDBusService()
1709
1710
def cleanup():
1711
"Cleanup function; run on exit"
1712
service.cleanup()
1713
1714
while tcp_server.clients:
1715
client = tcp_server.clients.pop()
1716
if use_dbus:
1717
client.remove_from_connection()
1718
client.disable_hook = None
1719
# Don't signal anything except ClientRemoved
1720
client.disable(quiet=True)
1721
if use_dbus:
1722
# Emit D-Bus signal
1723
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
1724
client.name)
1725
1726
atexit.register(cleanup)
1727
1728
for client in tcp_server.clients:
1729
if use_dbus:
1730
# Emit D-Bus signal
1731
mandos_dbus_service.ClientAdded(client.dbus_object_path)
1732
client.enable()
1733
1734
tcp_server.enable()
1735
tcp_server.server_activate()
1736
788
for client in clients:
789
client.start()
790
791
tcp_server = IPv6_TCPServer((server_settings["address"],
792
server_settings["port"]),
793
tcp_handler,
794
settings=server_settings,
795
clients=clients)
1737
796
# Find out what port we got
1738
797
service.port = tcp_server.socket.getsockname()[1]
1739
if use_ipv6:
1740
logger.info(u"Now listening on address %r, port %d,"
1741
" flowinfo %d, scope_id %d"
1742
% tcp_server.socket.getsockname())
1743
else: # IPv4
1744
logger.info(u"Now listening on address %r, port %d"
1745
% tcp_server.socket.getsockname())
798
logger.debug(u"Now listening on address %r, port %d, flowinfo %d,"
799
u" scope_id %d" % tcp_server.socket.getsockname())
1746
800
1747
801
#service.interface = tcp_server.socket.getsockname()[3]
1748
802
1749
803
try:
1750
804
# From the Avahi example code
805
server.connect_to_signal("StateChanged", server_state_changed)
1751
806
try:
1752
service.activate()
807
server_state_changed(server.GetState())
1753
808
except dbus.exceptions.DBusException, error:
1754
809
logger.critical(u"DBusException: %s", error)
1755
cleanup()
1756
810
sys.exit(1)
1757
811
# End of Avahi example code
1758
812
1759
813
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
1760
814
lambda *args, **kwargs:
1761
(tcp_server.handle_request
1762
(*args[2:], **kwargs) or True))
815
tcp_server.handle_request\
816
(*args[2:], **kwargs) or True)
1763
817
1764
logger.debug(u"Starting main loop")
818
logger.debug("Starting main loop")
819
main_loop_started = True
1765
820
main_loop.run()
1766
821
except AvahiError, error:
1767
logger.critical(u"AvahiError: %s", error)
1768
cleanup()
822
logger.critical(u"AvahiError: %s" + unicode(error))
1769
823
sys.exit(1)
1770
824
except KeyboardInterrupt:
1771
825
if debug:
1772
print >> sys.stderr
1773
logger.debug(u"Server received KeyboardInterrupt")
1774
logger.debug(u"Server exiting")
1775
# Must run before the D-Bus bus name gets deregistered
1776
cleanup()
826
print
1777
827
1778
828
if __name__ == '__main__':
1779
829
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0