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- Committer: teddy at bsnet
- Date: 2010-09-02 19:07:20 UTC
- mto: (24.1.154 mandos)
- mto: This revision was merged to the branch mainline in revision 421.
- Revision ID: teddy@fukt.bsnet.se-20100902190720-sp0pitu30isx4pvi
* mandos (ClientDBus.approvals_pending): Bug fix: Only send D-Bus
signals if connected to the
D-Bus.
signals if connected to the
D-Bus.
- files added:
- .bzr-builddeb
- debian
- debian/po
- files removed:
- network-protocol.txt
- files renamed:
- mandos-client.c => plugin-runner.c
- mandos-client.xml => plugin-runner.xml
- plugins.d/password-request.c => plugins.d/mandos-client.c
- plugins.d/password-request.xml => plugins.d/mandos-client.xml
- files modified:
- Makefile
added
removed
mandos
6
6
# This program is partly derived from an example program for an Avahi
7
7
# service publisher, downloaded from
8
8
# <http://avahi.org/wiki/PythonPublishExample>. This includes the
9
# methods "add" and "remove" in the "AvahiService" class, the
10
# "server_state_changed" and "entry_group_state_changed" functions,
11
# and some lines in "main".
9
# methods "add", "remove", "server_state_changed",
10
# "entry_group_state_changed", "cleanup", and "activate" in the
11
# "AvahiService" class, and some lines in "main".
12
12
#
13
13
# Everything else is
14
# Copyright © 2007-2008 Teddy Hogeborn & Björn Påhlsson
14
# Copyright © 2008,2009 Teddy Hogeborn
15
# Copyright © 2008,2009 Björn Påhlsson
15
16
#
16
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# This program is free software: you can redistribute it and/or modify
17
18
# it under the terms of the GNU General Public License as published by
24
25
# GNU General Public License for more details.
25
26
#
26
27
# You should have received a copy of the GNU General Public License
27
# along with this program. If not, see <http://www.gnu.org/licenses/>.
28
# along with this program. If not, see
29
# <http://www.gnu.org/licenses/>.
28
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#
29
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# Contact the authors at <mandos@fukt.bsnet.se>.
30
32
#
31
33
32
from __future__ import division
34
from __future__ import division, with_statement, absolute_import
33
35
34
import SocketServer
36
import SocketServer as socketserver
35
37
import socket
36
import select
37
from optparse import OptionParser
38
import optparse
38
39
import datetime
39
40
import errno
40
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import gnutls.crypto
43
44
import gnutls.library.functions
44
45
import gnutls.library.constants
45
46
import gnutls.library.types
46
import ConfigParser
47
import ConfigParser as configparser
47
48
import sys
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49
import re
49
50
import os
50
51
import signal
51
from sets import Set
52
52
import subprocess
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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
57
64
58
65
import dbus
66
import dbus.service
59
67
import gobject
60
68
import avahi
61
69
from dbus.mainloop.glib import DBusGMainLoop
62
70
import ctypes
63
64
version = "1.0"
65
66
logger = logging.Logger('mandos')
67
syslogger = logging.handlers.SysLogHandler\
68
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
69
address = "/dev/log")
70
syslogger.setFormatter(logging.Formatter\
71
('Mandos: %(levelname)s: %(message)s'))
71
import ctypes.util
72
import xml.dom.minidom
73
import inspect
74
75
try:
76
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
77
except AttributeError:
78
try:
79
from IN import SO_BINDTODEVICE
80
except ImportError:
81
SO_BINDTODEVICE = None
82
83
84
version = "1.0.14"
85
86
logger = logging.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'))
72
93
logger.addHandler(syslogger)
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94
74
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console = logging.StreamHandler()
75
console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
76
' %(message)s'))
96
console.setFormatter(logging.Formatter(u'%(name)s [%(process)d]:'
97
u' %(levelname)s:'
98
u' %(message)s'))
77
99
logger.addHandler(console)
78
100
101
multiprocessing_manager = multiprocessing.Manager()
102
79
103
class AvahiError(Exception):
80
def __init__(self, value):
104
def __init__(self, value, *args, **kwargs):
81
105
self.value = value
82
def __str__(self):
83
return repr(self.value)
106
super(AvahiError, self).__init__(value, *args, **kwargs)
107
def __unicode__(self):
108
return unicode(repr(self.value))
84
109
85
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class AvahiServiceError(AvahiError):
86
111
pass
91
116
92
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class AvahiService(object):
93
118
"""An Avahi (Zeroconf) service.
119
94
120
Attributes:
95
121
interface: integer; avahi.IF_UNSPEC or an interface index.
96
122
Used to optionally bind to the specified interface.
97
name: string; Example: 'Mandos'
98
type: string; Example: '_mandos._tcp'.
123
name: string; Example: u'Mandos'
124
type: string; Example: u'_mandos._tcp'.
99
125
See <http://www.dns-sd.org/ServiceTypes.html>
100
126
port: integer; what port to announce
101
127
TXT: list of strings; TXT record for the service
104
130
max_renames: integer; maximum number of renames
105
131
rename_count: integer; counter so we only rename after collisions
106
132
a sensible number of times
133
group: D-Bus Entry Group
134
server: D-Bus Server
135
bus: dbus.SystemBus()
107
136
"""
108
137
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
109
type = None, port = None, TXT = None, domain = "",
110
host = "", max_renames = 32768):
138
servicetype = None, port = None, TXT = None,
139
domain = u"", host = u"", max_renames = 32768,
140
protocol = avahi.PROTO_UNSPEC, bus = None):
111
141
self.interface = interface
112
142
self.name = name
113
self.type = type
143
self.type = servicetype
114
144
self.port = port
115
if TXT is None:
116
self.TXT = []
117
else:
118
self.TXT = TXT
145
self.TXT = TXT if TXT is not None else []
119
146
self.domain = domain
120
147
self.host = host
121
148
self.rename_count = 0
149
self.max_renames = max_renames
150
self.protocol = protocol
151
self.group = None # our entry group
152
self.server = None
153
self.bus = bus
122
154
def rename(self):
123
155
"""Derived from the Avahi example code"""
124
156
if self.rename_count >= self.max_renames:
125
logger.critical(u"No suitable service name found after %i"
126
u" retries, exiting.", rename_count)
127
raise AvahiServiceError("Too many renames")
128
name = server.GetAlternativeServiceName(name)
129
logger.error(u"Changing name to %r ...", name)
130
syslogger.setFormatter(logging.Formatter\
131
('Mandos (%s): %%(levelname)s:'
132
' %%(message)s' % name))
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))
133
168
self.remove()
134
169
self.add()
135
170
self.rename_count += 1
136
171
def remove(self):
137
172
"""Derived from the Avahi example code"""
138
if group is not None:
139
group.Reset()
173
if self.group is not None:
174
self.group.Reset()
140
175
def add(self):
141
176
"""Derived from the Avahi example code"""
142
global group
143
if group is None:
144
group = dbus.Interface\
145
(bus.get_object(avahi.DBUS_NAME,
146
server.EntryGroupNew()),
147
avahi.DBUS_INTERFACE_ENTRY_GROUP)
148
group.connect_to_signal('StateChanged',
149
entry_group_state_changed)
150
logger.debug(u"Adding service '%s' of type '%s' ...",
151
service.name, service.type)
152
group.AddService(
153
self.interface, # interface
154
avahi.PROTO_INET6, # protocol
155
dbus.UInt32(0), # flags
156
self.name, self.type,
157
self.domain, self.host,
158
dbus.UInt16(self.port),
159
avahi.string_array_to_txt_array(self.TXT))
160
group.Commit()
161
162
# From the Avahi example code:
163
group = None # our entry group
164
# End of Avahi example code
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())
165
232
166
233
167
234
class Client(object):
168
235
"""A representation of a client host served by this server.
236
169
237
Attributes:
170
name: string; from the config file, used in log messages
238
name: string; from the config file, used in log messages and
239
D-Bus identifiers
171
240
fingerprint: string (40 or 32 hexadecimal digits); used to
172
241
uniquely identify the client
173
secret: bytestring; sent verbatim (over TLS) to client
174
host: string; available for use by the checker command
175
created: datetime.datetime(); object creation, not client host
176
last_checked_ok: datetime.datetime() or None if not yet checked OK
177
timeout: datetime.timedelta(); How long from last_checked_ok
178
until this client is invalid
179
interval: datetime.timedelta(); How often to start a new checker
180
stop_hook: If set, called by stop() as stop_hook(self)
181
checker: subprocess.Popen(); a running checker process used
182
to see if the client lives.
183
'None' if no process is running.
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.
184
255
checker_initiator_tag: a gobject event source tag, or None
185
stop_initiator_tag: - '' -
256
disable_initiator_tag: - '' -
186
257
checker_callback_tag: - '' -
187
258
checker_command: string; External command which is run to check if
188
259
client lives. %() expansions are done at
189
260
runtime with vars(self) as dict, so that for
190
261
instance %(name)s can be used in the command.
191
Private attibutes:
192
_timeout: Real variable for 'timeout'
193
_interval: Real variable for 'interval'
194
_timeout_milliseconds: Used when calling gobject.timeout_add()
195
_interval_milliseconds: - '' -
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
196
266
"""
197
def _set_timeout(self, timeout):
198
"Setter function for 'timeout' attribute"
199
self._timeout = timeout
200
self._timeout_milliseconds = ((self.timeout.days
201
* 24 * 60 * 60 * 1000)
202
+ (self.timeout.seconds * 1000)
203
+ (self.timeout.microseconds
204
// 1000))
205
timeout = property(lambda self: self._timeout,
206
_set_timeout)
207
del _set_timeout
208
def _set_interval(self, interval):
209
"Setter function for 'interval' attribute"
210
self._interval = interval
211
self._interval_milliseconds = ((self.interval.days
212
* 24 * 60 * 60 * 1000)
213
+ (self.interval.seconds
214
* 1000)
215
+ (self.interval.microseconds
216
// 1000))
217
interval = property(lambda self: self._interval,
218
_set_interval)
219
del _set_interval
220
def __init__(self, name = None, stop_hook=None, config={}):
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):
221
287
"""Note: the 'checker' key in 'config' sets the
222
288
'checker_command' attribute and *not* the 'checker'
223
289
attribute."""
224
290
self.name = name
291
if config is None:
292
config = {}
225
293
logger.debug(u"Creating client %r", self.name)
226
294
# Uppercase and remove spaces from fingerprint for later
227
295
# comparison purposes with return value from the fingerprint()
228
296
# function
229
self.fingerprint = config["fingerprint"].upper()\
230
.replace(u" ", u"")
297
self.fingerprint = (config[u"fingerprint"].upper()
298
.replace(u" ", u""))
231
299
logger.debug(u" Fingerprint: %s", self.fingerprint)
232
if "secret" in config:
233
self.secret = config["secret"].decode(u"base64")
234
elif "secfile" in config:
235
sf = open(config["secfile"])
236
self.secret = sf.read()
237
sf.close()
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()
238
307
else:
308
#XXX Need to allow secret on demand!
239
309
raise TypeError(u"No secret or secfile for client %s"
240
310
% self.name)
241
self.host = config.get("host", "")
242
self.created = datetime.datetime.now()
311
self.host = config.get(u"host", u"")
312
self.created = datetime.datetime.utcnow()
313
self.enabled = False
314
self.last_enabled = None
243
315
self.last_checked_ok = None
244
self.timeout = string_to_delta(config["timeout"])
245
self.interval = string_to_delta(config["interval"])
246
self.stop_hook = stop_hook
316
self.timeout = string_to_delta(config[u"timeout"])
317
self.interval = string_to_delta(config[u"interval"])
318
self.disable_hook = disable_hook
247
319
self.checker = None
248
320
self.checker_initiator_tag = None
249
self.stop_initiator_tag = None
321
self.disable_initiator_tag = None
250
322
self.checker_callback_tag = None
251
self.check_command = config["checker"]
252
def start(self):
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):
253
342
"""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()
254
348
# Schedule a new checker to be started an 'interval' from now,
255
349
# and every interval from then on.
256
self.checker_initiator_tag = gobject.timeout_add\
257
(self._interval_milliseconds,
258
self.start_checker)
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
259
358
# Also start a new checker *right now*.
260
359
self.start_checker()
261
# Schedule a stop() when 'timeout' has passed
262
self.stop_initiator_tag = gobject.timeout_add\
263
(self._timeout_milliseconds,
264
self.stop)
265
def stop(self):
266
"""Stop this client.
267
The possibility that a client might be restarted is left open,
268
but not currently used."""
269
# If this client doesn't have a secret, it is already stopped.
270
if hasattr(self, "secret") and self.secret:
271
logger.info(u"Stopping client %s", self.name)
272
self.secret = None
273
else:
360
361
def disable(self, quiet=True):
362
"""Disable this client."""
363
if not getattr(self, "enabled", False):
274
364
return False
275
if getattr(self, "stop_initiator_tag", False):
276
gobject.source_remove(self.stop_initiator_tag)
277
self.stop_initiator_tag = None
278
if getattr(self, "checker_initiator_tag", False):
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):
279
373
gobject.source_remove(self.checker_initiator_tag)
280
374
self.checker_initiator_tag = None
281
375
self.stop_checker()
282
if self.stop_hook:
283
self.stop_hook(self)
376
if self.disable_hook:
377
self.disable_hook(self)
378
self.enabled = False
284
379
# Do not run this again if called by a gobject.timeout_add
285
380
return False
381
286
382
def __del__(self):
287
self.stop_hook = None
288
self.stop()
289
def checker_callback(self, pid, condition):
383
self.disable_hook = None
384
self.disable()
385
386
def checker_callback(self, pid, condition, command):
290
387
"""The checker has completed, so take appropriate actions."""
291
now = datetime.datetime.now()
292
388
self.checker_callback_tag = None
293
389
self.checker = None
294
if os.WIFEXITED(condition) \
295
and (os.WEXITSTATUS(condition) == 0):
296
logger.info(u"Checker for %(name)s succeeded",
297
vars(self))
298
self.last_checked_ok = now
299
gobject.source_remove(self.stop_initiator_tag)
300
self.stop_initiator_tag = gobject.timeout_add\
301
(self._timeout_milliseconds,
302
self.stop)
303
elif not os.WIFEXITED(condition):
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:
304
400
logger.warning(u"Checker for %(name)s crashed?",
305
401
vars(self))
306
else:
307
logger.info(u"Checker for %(name)s failed",
308
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
309
415
def start_checker(self):
310
416
"""Start a new checker subprocess if one is not running.
417
311
418
If a checker already exists, leave it running and do
312
419
nothing."""
313
420
# The reason for not killing a running checker is that if we
316
423
# client would inevitably timeout, since no checker would get
317
424
# a chance to run to completion. If we instead leave running
318
425
# checkers alone, the checker would have to take more time
319
# than 'timeout' for the client to be declared invalid, which
320
# is as it should be.
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
321
443
if self.checker is None:
322
444
try:
323
# In case check_command has exactly one % operator
324
command = self.check_command % self.host
445
# In case checker_command has exactly one % operator
446
command = self.checker_command % self.host
325
447
except TypeError:
326
448
# Escape attributes for the shell
327
escaped_attrs = dict((key, re.escape(str(val)))
449
escaped_attrs = dict((key,
450
re.escape(unicode(str(val),
451
errors=
452
u'replace')))
328
453
for key, val in
329
454
vars(self).iteritems())
330
455
try:
331
command = self.check_command % escaped_attrs
456
command = self.checker_command % escaped_attrs
332
457
except TypeError, error:
333
458
logger.error(u'Could not format string "%s":'
334
u' %s', self.check_command, error)
459
u' %s', self.checker_command, error)
335
460
return True # Try again later
461
self.current_checker_command = command
336
462
try:
337
463
logger.info(u"Starting checker %r for %s",
338
464
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.)
339
469
self.checker = subprocess.Popen(command,
340
470
close_fds=True,
341
shell=True, cwd="/")
342
self.checker_callback_tag = gobject.child_watch_add\
343
(self.checker.pid,
344
self.checker_callback)
345
except subprocess.OSError, error:
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:
346
483
logger.error(u"Failed to start subprocess: %s",
347
484
error)
348
485
# Re-run this periodically if run by gobject.timeout_add
349
486
return True
487
350
488
def stop_checker(self):
351
489
"""Force the checker process, if any, to stop."""
352
490
if self.checker_callback_tag:
353
491
gobject.source_remove(self.checker_callback_tag)
354
492
self.checker_callback_tag = None
355
if getattr(self, "checker", None) is None:
493
if getattr(self, u"checker", None) is None:
356
494
return
357
495
logger.debug(u"Stopping checker for %(name)s", vars(self))
358
496
try:
359
497
os.kill(self.checker.pid, signal.SIGTERM)
360
#os.sleep(0.5)
498
#time.sleep(0.5)
361
499
#if self.checker.poll() is None:
362
500
# os.kill(self.checker.pid, signal.SIGKILL)
363
501
except OSError, error:
364
502
if error.errno != errno.ESRCH: # No such process
365
503
raise
366
504
self.checker = None
367
def still_valid(self):
368
"""Has the timeout not yet passed for this client?"""
369
now = datetime.datetime.now()
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
370
988
if self.last_checked_ok is None:
371
return now < (self.created + self.timeout)
372
else:
373
return now < (self.last_checked_ok + self.timeout)
374
375
376
def peer_certificate(session):
377
"Return the peer's OpenPGP certificate as a bytestring"
378
# If not an OpenPGP certificate...
379
if gnutls.library.functions.gnutls_certificate_type_get\
380
(session._c_object) \
381
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP:
382
# ...do the normal thing
383
return session.peer_certificate
384
list_size = ctypes.c_uint()
385
cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
386
(session._c_object, ctypes.byref(list_size))
387
if list_size.value == 0:
388
return None
389
cert = cert_list[0]
390
return ctypes.string_at(cert.data, cert.size)
391
392
393
def fingerprint(openpgp):
394
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
395
# New GnuTLS "datum" with the OpenPGP public key
396
datum = gnutls.library.types.gnutls_datum_t\
397
(ctypes.cast(ctypes.c_char_p(openpgp),
398
ctypes.POINTER(ctypes.c_ubyte)),
399
ctypes.c_uint(len(openpgp)))
400
# New empty GnuTLS certificate
401
crt = gnutls.library.types.gnutls_openpgp_crt_t()
402
gnutls.library.functions.gnutls_openpgp_crt_init\
403
(ctypes.byref(crt))
404
# Import the OpenPGP public key into the certificate
405
gnutls.library.functions.gnutls_openpgp_crt_import\
406
(crt, ctypes.byref(datum),
407
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
408
# New buffer for the fingerprint
409
buffer = ctypes.create_string_buffer(20)
410
buffer_length = ctypes.c_size_t()
411
# Get the fingerprint from the certificate into the buffer
412
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
413
(crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
414
# Deinit the certificate
415
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
416
# Convert the buffer to a Python bytestring
417
fpr = ctypes.string_at(buffer, buffer_length.value)
418
# Convert the bytestring to hexadecimal notation
419
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
420
return hex_fpr
421
422
423
class tcp_handler(SocketServer.BaseRequestHandler, object):
424
"""A TCP request handler class.
425
Instantiated by IPv6_TCPServer for each request to handle it.
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.
426
1106
Note: This will run in its own forked process."""
427
1107
428
1108
def handle(self):
429
logger.info(u"TCP connection from: %s",
430
unicode(self.client_address))
431
session = gnutls.connection.ClientSession\
432
(self.request, gnutls.connection.X509Credentials())
433
434
line = self.request.makefile().readline()
435
logger.debug(u"Protocol version: %r", line)
436
try:
437
if int(line.strip().split()[0]) > 1:
438
raise RuntimeError
439
except (ValueError, IndexError, RuntimeError), error:
440
logger.error(u"Unknown protocol version: %s", error)
441
return
442
443
# Note: gnutls.connection.X509Credentials is really a generic
444
# GnuTLS certificate credentials object so long as no X.509
445
# keys are added to it. Therefore, we can use it here despite
446
# using OpenPGP certificates.
447
448
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
449
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
450
# "+DHE-DSS"))
451
priority = "NORMAL" # Fallback default, since this
452
# MUST be set.
453
if self.server.settings["priority"]:
454
priority = self.server.settings["priority"]
455
gnutls.library.functions.gnutls_priority_set_direct\
456
(session._c_object, priority, None);
457
458
try:
459
session.handshake()
460
except gnutls.errors.GNUTLSError, error:
461
logger.warning(u"Handshake failed: %s", error)
462
# Do not run session.bye() here: the session is not
463
# established. Just abandon the request.
464
return
465
try:
466
fpr = fingerprint(peer_certificate(session))
467
except (TypeError, gnutls.errors.GNUTLSError), error:
468
logger.warning(u"Bad certificate: %s", error)
469
session.bye()
470
return
471
logger.debug(u"Fingerprint: %s", fpr)
472
client = None
473
for c in self.server.clients:
474
if c.fingerprint == fpr:
475
client = c
476
break
477
if not client:
478
logger.warning(u"Client not found for fingerprint: %s",
479
fpr)
480
session.bye()
481
return
482
# Have to check if client.still_valid(), since it is possible
483
# that the client timed out while establishing the GnuTLS
484
# session.
485
if not client.still_valid():
486
logger.warning(u"Client %(name)s is invalid",
487
vars(client))
488
session.bye()
489
return
490
sent_size = 0
491
while sent_size < len(client.secret):
492
sent = session.send(client.secret[sent_size:])
493
logger.debug(u"Sent: %d, remaining: %d",
494
sent, len(client.secret)
495
- (sent_size + sent))
496
sent_size += sent
497
session.bye()
498
499
500
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
501
"""IPv6 TCP server. Accepts 'None' as address and/or port.
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
502
1347
Attributes:
503
settings: Server settings
504
clients: Set() of Client objects
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
505
1351
"""
506
address_family = socket.AF_INET6
507
def __init__(self, *args, **kwargs):
508
if "settings" in kwargs:
509
self.settings = kwargs["settings"]
510
del kwargs["settings"]
511
if "clients" in kwargs:
512
self.clients = kwargs["clients"]
513
del kwargs["clients"]
514
return super(type(self), self).__init__(*args, **kwargs)
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)
515
1359
def server_bind(self):
516
1360
"""This overrides the normal server_bind() function
517
1361
to bind to an interface if one was specified, and also NOT to
518
1362
bind to an address or port if they were not specified."""
519
if self.settings["interface"]:
520
# 25 is from /usr/include/asm-i486/socket.h
521
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
522
try:
523
self.socket.setsockopt(socket.SOL_SOCKET,
524
SO_BINDTODEVICE,
525
self.settings["interface"])
526
except socket.error, error:
527
if error[0] == errno.EPERM:
528
logger.error(u"No permission to"
529
u" bind to interface %s",
530
self.settings["interface"])
531
else:
532
raise error
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
533
1385
# Only bind(2) the socket if we really need to.
534
1386
if self.server_address[0] or self.server_address[1]:
535
1387
if not self.server_address[0]:
536
in6addr_any = "::"
537
self.server_address = (in6addr_any,
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,
538
1393
self.server_address[1])
539
1394
elif not self.server_address[1]:
540
1395
self.server_address = (self.server_address[0],
541
1396
0)
542
# if self.settings["interface"]:
1397
# if self.interface:
543
1398
# self.server_address = (self.server_address[0],
544
1399
# 0, # port
545
1400
# 0, # flowinfo
546
1401
# if_nametoindex
547
# (self.settings
548
# ["interface"]))
549
return super(type(self), self).server_bind()
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
550
1509
551
1510
552
1511
def string_to_delta(interval):
553
1512
"""Parse a string and return a datetime.timedelta
554
555
>>> string_to_delta('7d')
1513
1514
>>> string_to_delta(u'7d')
556
1515
datetime.timedelta(7)
557
>>> string_to_delta('60s')
1516
>>> string_to_delta(u'60s')
558
1517
datetime.timedelta(0, 60)
559
>>> string_to_delta('60m')
1518
>>> string_to_delta(u'60m')
560
1519
datetime.timedelta(0, 3600)
561
>>> string_to_delta('24h')
1520
>>> string_to_delta(u'24h')
562
1521
datetime.timedelta(1)
563
1522
>>> string_to_delta(u'1w')
564
1523
datetime.timedelta(7)
1524
>>> string_to_delta(u'5m 30s')
1525
datetime.timedelta(0, 330)
565
1526
"""
566
try:
567
suffix=unicode(interval[-1])
568
value=int(interval[:-1])
569
if suffix == u"d":
570
delta = datetime.timedelta(value)
571
elif suffix == u"s":
572
delta = datetime.timedelta(0, value)
573
elif suffix == u"m":
574
delta = datetime.timedelta(0, 0, 0, 0, value)
575
elif suffix == u"h":
576
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
577
elif suffix == u"w":
578
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
579
else:
580
raise ValueError
581
except (ValueError, IndexError):
582
raise ValueError
583
return delta
584
585
586
def server_state_changed(state):
587
"""Derived from the Avahi example code"""
588
if state == avahi.SERVER_COLLISION:
589
logger.error(u"Server name collision")
590
service.remove()
591
elif state == avahi.SERVER_RUNNING:
592
service.add()
593
594
595
def entry_group_state_changed(state, error):
596
"""Derived from the Avahi example code"""
597
logger.debug(u"state change: %i", state)
598
599
if state == avahi.ENTRY_GROUP_ESTABLISHED:
600
logger.debug(u"Service established.")
601
elif state == avahi.ENTRY_GROUP_COLLISION:
602
logger.warning(u"Service name collision.")
603
service.rename()
604
elif state == avahi.ENTRY_GROUP_FAILURE:
605
logger.critical(u"Error in group state changed %s",
606
unicode(error))
607
raise AvahiGroupError("State changed: %s", str(error))
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
608
1549
609
1550
def if_nametoindex(interface):
610
"""Call the C function if_nametoindex(), or equivalent"""
1551
"""Call the C function if_nametoindex(), or equivalent
1552
1553
Note: This function cannot accept a unicode string."""
611
1554
global if_nametoindex
612
1555
try:
613
if "ctypes.util" not in sys.modules:
614
import ctypes.util
615
if_nametoindex = ctypes.cdll.LoadLibrary\
616
(ctypes.util.find_library("c")).if_nametoindex
1556
if_nametoindex = (ctypes.cdll.LoadLibrary
1557
(ctypes.util.find_library(u"c"))
1558
.if_nametoindex)
617
1559
except (OSError, AttributeError):
618
if "struct" not in sys.modules:
619
import struct
620
if "fcntl" not in sys.modules:
621
import fcntl
1560
logger.warning(u"Doing if_nametoindex the hard way")
622
1561
def if_nametoindex(interface):
623
1562
"Get an interface index the hard way, i.e. using fcntl()"
624
1563
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
625
s = socket.socket()
626
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
627
struct.pack("16s16x", interface))
628
s.close()
629
interface_index = struct.unpack("I", ifreq[16:20])[0]
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]
630
1570
return interface_index
631
1571
return if_nametoindex(interface)
632
1572
633
1573
634
1574
def daemon(nochdir = False, noclose = False):
635
1575
"""See daemon(3). Standard BSD Unix function.
1576
636
1577
This should really exist as os.daemon, but it doesn't (yet)."""
637
1578
if os.fork():
638
1579
sys.exit()
639
1580
os.setsid()
640
1581
if not nochdir:
641
os.chdir("/")
1582
os.chdir(u"/")
642
1583
if os.fork():
643
1584
sys.exit()
644
1585
if not noclose:
646
1587
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
647
1588
if not stat.S_ISCHR(os.fstat(null).st_mode):
648
1589
raise OSError(errno.ENODEV,
649
"/dev/null not a character device")
1590
u"%s not a character device"
1591
% os.path.devnull)
650
1592
os.dup2(null, sys.stdin.fileno())
651
1593
os.dup2(null, sys.stdout.fileno())
652
1594
os.dup2(null, sys.stderr.fileno())
655
1597
656
1598
657
1599
def main():
658
global main_loop_started
659
main_loop_started = False
660
661
parser = OptionParser(version = "%%prog %s" % version)
662
parser.add_option("-i", "--interface", type="string",
663
metavar="IF", help="Bind to interface IF")
664
parser.add_option("-a", "--address", type="string",
665
help="Address to listen for requests on")
666
parser.add_option("-p", "--port", type="int",
667
help="Port number to receive requests on")
668
parser.add_option("--check", action="store_true", default=False,
669
help="Run self-test")
670
parser.add_option("--debug", action="store_true",
671
help="Debug mode; run in foreground and log to"
672
" terminal")
673
parser.add_option("--priority", type="string", help="GnuTLS"
674
" priority string (see GnuTLS documentation)")
675
parser.add_option("--servicename", type="string", metavar="NAME",
676
help="Zeroconf service name")
677
parser.add_option("--configdir", type="string",
678
default="/etc/mandos", metavar="DIR",
679
help="Directory to search for configuration"
680
" files")
681
(options, args) = parser.parse_args()
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]
682
1630
683
1631
if options.check:
684
1632
import doctest
686
1634
sys.exit()
687
1635
688
1636
# Default values for config file for server-global settings
689
server_defaults = { "interface": "",
690
"address": "",
691
"port": "",
692
"debug": "False",
693
"priority":
694
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
695
"servicename": "Mandos",
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",
696
1646
}
697
1647
698
1648
# Parse config file for server-global settings
699
server_config = ConfigParser.SafeConfigParser(server_defaults)
1649
server_config = configparser.SafeConfigParser(server_defaults)
700
1650
del server_defaults
701
server_config.read(os.path.join(options.configdir, "mandos.conf"))
702
server_section = "server"
1651
server_config.read(os.path.join(options.configdir,
1652
u"mandos.conf"))
703
1653
# Convert the SafeConfigParser object to a dict
704
server_settings = dict(server_config.items(server_section))
705
# Use getboolean on the boolean config option
706
server_settings["debug"] = server_config.getboolean\
707
(server_section, "debug")
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")
708
1662
del server_config
709
1663
710
1664
# Override the settings from the config file with command line
711
1665
# options, if set.
712
for option in ("interface", "address", "port", "debug",
713
"priority", "servicename", "configdir"):
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"):
714
1669
value = getattr(options, option)
715
1670
if value is not None:
716
1671
server_settings[option] = value
717
1672
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])
718
1677
# Now we have our good server settings in "server_settings"
719
1678
720
debug = server_settings["debug"]
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
1685
722
1686
if not debug:
723
1687
syslogger.setLevel(logging.WARNING)
724
1688
console.setLevel(logging.WARNING)
725
1689
726
if server_settings["servicename"] != "Mandos":
727
syslogger.setFormatter(logging.Formatter\
728
('Mandos (%s): %%(levelname)s:'
729
' %%(message)s'
730
% server_settings["servicename"]))
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"]))
731
1695
732
1696
# Parse config file with clients
733
client_defaults = { "timeout": "1h",
734
"interval": "5m",
735
"checker": "fping -q -- %%(host)s",
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",
736
1703
}
737
client_config = ConfigParser.SafeConfigParser(client_defaults)
738
client_config.read(os.path.join(server_settings["configdir"],
739
"clients.conf"))
740
741
global service
742
service = AvahiService(name = server_settings["servicename"],
743
type = "_mandos._tcp", );
744
if server_settings["interface"]:
745
service.interface = if_nametoindex(server_settings["interface"])
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))
746
1758
747
1759
global main_loop
748
global bus
749
global server
750
1760
# From the Avahi example code
751
1761
DBusGMainLoop(set_as_default=True )
752
1762
main_loop = gobject.MainLoop()
753
1763
bus = dbus.SystemBus()
754
server = dbus.Interface(
755
bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
756
avahi.DBUS_INTERFACE_SERVER )
757
1764
# End of Avahi example code
758
759
clients = Set()
760
def remove_from_clients(client):
761
clients.remove(client)
762
if not clients:
763
logger.critical(u"No clients left, exiting")
764
sys.exit()
765
766
clients.update(Set(Client(name = section,
767
stop_hook = remove_from_clients,
768
config
769
= dict(client_config.items(section)))
770
for section in client_config.sections()))
771
if not clients:
772
logger.critical(u"No clients defined")
773
sys.exit(1)
774
775
if not debug:
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
776
1813
logger.removeHandler(console)
1814
# Close all input and output, do double fork, etc.
777
1815
daemon()
778
1816
779
pidfilename = "/var/run/mandos/mandos.pid"
780
pid = os.getpid()
781
1817
try:
782
pidfile = open(pidfilename, "w")
783
pidfile.write(str(pid) + "\n")
784
pidfile.close()
1818
with pidfile:
1819
pid = os.getpid()
1820
pidfile.write(str(pid) + "\n")
785
1821
del pidfile
786
except IOError, err:
787
logger.error(u"Could not write %s file with PID %d",
788
pidfilename, os.getpid())
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
1829
1830
if not debug:
1831
signal.signal(signal.SIGINT, signal.SIG_IGN)
1832
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1833
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1834
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()
789
1889
790
1890
def cleanup():
791
1891
"Cleanup function; run on exit"
792
global group
793
# From the Avahi example code
794
if not group is None:
795
group.Free()
796
group = None
797
# End of Avahi example code
1892
service.cleanup()
798
1893
799
while clients:
800
client = clients.pop()
801
client.stop_hook = None
802
client.stop()
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)
803
1905
804
1906
atexit.register(cleanup)
805
1907
806
if not debug:
807
signal.signal(signal.SIGINT, signal.SIG_IGN)
808
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
809
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
810
811
for client in clients:
812
client.start()
813
814
tcp_server = IPv6_TCPServer((server_settings["address"],
815
server_settings["port"]),
816
tcp_handler,
817
settings=server_settings,
818
clients=clients)
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
819
1917
# Find out what port we got
820
1918
service.port = tcp_server.socket.getsockname()[1]
821
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
822
u" scope_id %d" % tcp_server.socket.getsockname())
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())
823
1926
824
1927
#service.interface = tcp_server.socket.getsockname()[3]
825
1928
826
1929
try:
827
1930
# From the Avahi example code
828
server.connect_to_signal("StateChanged", server_state_changed)
829
1931
try:
830
server_state_changed(server.GetState())
1932
service.activate()
831
1933
except dbus.exceptions.DBusException, error:
832
1934
logger.critical(u"DBusException: %s", error)
1935
cleanup()
833
1936
sys.exit(1)
834
1937
# End of Avahi example code
835
1938
836
1939
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
837
1940
lambda *args, **kwargs:
838
tcp_server.handle_request\
839
(*args[2:], **kwargs) or True)
1941
(tcp_server.handle_request
1942
(*args[2:], **kwargs) or True))
840
1943
841
1944
logger.debug(u"Starting main loop")
842
main_loop_started = True
843
1945
main_loop.run()
844
1946
except AvahiError, error:
845
logger.critical(u"AvahiError: %s" + unicode(error))
1947
logger.critical(u"AvahiError: %s", error)
1948
cleanup()
846
1949
sys.exit(1)
847
1950
except KeyboardInterrupt:
848
1951
if debug:
849
print
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
1957
851
1958
if __name__ == '__main__':
852
1959
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0