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- Committer: Teddy Hogeborn
- Date: 2008-08-22 00:16:20 UTC
- mfrom: (24.1.57 mandos)
- Revision ID: teddy@fukt.bsnet.se-20080822001620-vxpn1evy0t0kyvj0
* clients.conf ([DEFAULT]/checker): Update to new default value.
* mandos (Client.start_checker): Bug fix: OSError, not
subprocess.OSError.
(main): Use "fping -q -- %(host)s" instead of "fping -q --
%%(host)s" as default value for "checker". Always redirect
stdin to be from /dev/null, even if in debug mode.
* mandos-clients.conf.xml (DESCRIPTION): Improved wording and refer to
the EXPANSION section.
(OPTIONS): Added synopsis and improved wording for "checker",
"fingerprint", and "secret". Refer to the RUNTIME
EXPANSION section for the "checker" option.
(EXAMPLE): Update to new default value for "checker".
* mandos-keygen (trap): Split lines and add "set +e".
* mandos (Client.start_checker): Bug fix: OSError, not
subprocess.OSError.
(main): Use "fping -q -- %(host)s" instead of "fping -q --
%%(host)s" as default value for "checker". Always redirect
stdin to be from /dev/null, even if in debug mode.
* mandos-clients.conf.xml (DESCRIPTION): Improved wording and refer to
the EXPANSION section.
(OPTIONS): Added synopsis and improved wording for "checker",
"fingerprint", and "secret". Refer to the RUNTIME
EXPANSION section for the "checker" option.
(EXAMPLE): Update to new default value for "checker".
* mandos-keygen (trap): Split lines and add "set +e".
- files added:
- plugins.d/usplash
- files removed:
- .bzr-builddeb
- debian
- debian/po
- files renamed:
- plugins.d/mandos-client.c => plugins.d/password-request.c
- plugins.d/mandos-client.xml => plugins.d/password-request.xml
- files modified:
- Makefile
added
removed
mandos
6
6
# This program is partly derived from an example program for an Avahi
7
7
# service publisher, downloaded from
8
8
# <http://avahi.org/wiki/PythonPublishExample>. This includes the
9
# methods "add", "remove", "server_state_changed",
10
# "entry_group_state_changed", "cleanup", and "activate" in the
11
# "AvahiService" class, and some lines in "main".
9
# methods "add" and "remove" in the "AvahiService" class, the
10
# "server_state_changed" and "entry_group_state_changed" functions,
11
# and some lines in "main".
12
12
#
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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
#
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16
# This program is free software: you can redistribute it and/or modify
18
17
# it under the terms of the GNU General Public License as published by
25
24
# GNU General Public License for more details.
26
25
#
27
26
# You should have received a copy of the GNU General Public License
28
# along with this program. If not, see
29
# <http://www.gnu.org/licenses/>.
27
# along with this program. If not, see <http://www.gnu.org/licenses/>.
30
28
#
31
29
# Contact the authors at <mandos@fukt.bsnet.se>.
32
30
#
33
31
34
from __future__ import division, with_statement, absolute_import
32
from __future__ import division
35
33
36
import SocketServer as socketserver
34
import SocketServer
37
35
import socket
38
import optparse
36
import select
37
from optparse import OptionParser
39
38
import datetime
40
39
import errno
41
40
import gnutls.crypto
44
43
import gnutls.library.functions
45
44
import gnutls.library.constants
46
45
import gnutls.library.types
47
import ConfigParser as configparser
46
import ConfigParser
48
47
import sys
49
48
import re
50
49
import os
51
50
import signal
51
from sets import Set
52
52
import subprocess
53
53
import atexit
54
54
import stat
55
55
import logging
56
56
import logging.handlers
57
import pwd
58
import contextlib
59
import struct
60
import fcntl
61
import functools
62
import cPickle as pickle
63
import multiprocessing
64
57
65
58
import dbus
66
import dbus.service
67
59
import gobject
68
60
import avahi
69
61
from dbus.mainloop.glib import DBusGMainLoop
70
62
import ctypes
71
import ctypes.util
72
import xml.dom.minidom
73
import inspect
74
75
try:
76
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
77
except AttributeError:
78
try:
79
from IN import SO_BINDTODEVICE
80
except ImportError:
81
SO_BINDTODEVICE = None
82
83
84
version = "1.0.14"
85
86
#logger = logging.getLogger(u'mandos')
87
logger = logging.Logger(u'mandos')
88
syslogger = (logging.handlers.SysLogHandler
89
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
90
address = "/dev/log"))
91
syslogger.setFormatter(logging.Formatter
92
(u'Mandos [%(process)d]: %(levelname)s:'
93
u' %(message)s'))
63
64
version = "1.0"
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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'))
94
72
logger.addHandler(syslogger)
95
73
96
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console = logging.StreamHandler()
97
console.setFormatter(logging.Formatter(u'%(name)s [%(process)d]:'
98
u' %(levelname)s:'
99
u' %(message)s'))
75
console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
76
' %(message)s'))
100
77
logger.addHandler(console)
101
78
102
79
class AvahiError(Exception):
103
def __init__(self, value, *args, **kwargs):
80
def __init__(self, value):
104
81
self.value = value
105
super(AvahiError, self).__init__(value, *args, **kwargs)
106
def __unicode__(self):
107
return unicode(repr(self.value))
82
def __str__(self):
83
return repr(self.value)
108
84
109
85
class AvahiServiceError(AvahiError):
110
86
pass
115
91
116
92
class AvahiService(object):
117
93
"""An Avahi (Zeroconf) service.
118
119
94
Attributes:
120
95
interface: integer; avahi.IF_UNSPEC or an interface index.
121
96
Used to optionally bind to the specified interface.
122
name: string; Example: u'Mandos'
123
type: string; Example: u'_mandos._tcp'.
97
name: string; Example: 'Mandos'
98
type: string; Example: '_mandos._tcp'.
124
99
See <http://www.dns-sd.org/ServiceTypes.html>
125
100
port: integer; what port to announce
126
101
TXT: list of strings; TXT record for the service
129
104
max_renames: integer; maximum number of renames
130
105
rename_count: integer; counter so we only rename after collisions
131
106
a sensible number of times
132
group: D-Bus Entry Group
133
server: D-Bus Server
134
bus: dbus.SystemBus()
135
107
"""
136
108
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
137
servicetype = None, port = None, TXT = None,
138
domain = u"", host = u"", max_renames = 32768,
139
protocol = avahi.PROTO_UNSPEC, bus = None):
109
type = None, port = None, TXT = None, domain = "",
110
host = "", max_renames = 32768):
140
111
self.interface = interface
141
112
self.name = name
142
self.type = servicetype
113
self.type = type
143
114
self.port = port
144
self.TXT = TXT if TXT is not None else []
115
if TXT is None:
116
self.TXT = []
117
else:
118
self.TXT = TXT
145
119
self.domain = domain
146
120
self.host = host
147
121
self.rename_count = 0
148
122
self.max_renames = max_renames
149
self.protocol = protocol
150
self.group = None # our entry group
151
self.server = None
152
self.bus = bus
153
123
def rename(self):
154
124
"""Derived from the Avahi example code"""
155
125
if self.rename_count >= self.max_renames:
156
logger.critical(u"No suitable Zeroconf service name found"
157
u" after %i retries, exiting.",
158
self.rename_count)
159
raise AvahiServiceError(u"Too many renames")
160
self.name = unicode(self.server.GetAlternativeServiceName(self.name))
161
logger.info(u"Changing Zeroconf service name to %r ...",
162
self.name)
163
syslogger.setFormatter(logging.Formatter
164
(u'Mandos (%s) [%%(process)d]:'
165
u' %%(levelname)s: %%(message)s'
166
% self.name))
126
logger.critical(u"No suitable service name found after %i"
127
u" retries, exiting.", rename_count)
128
raise AvahiServiceError("Too many renames")
129
self.name = server.GetAlternativeServiceName(self.name)
130
logger.info(u"Changing name to %r ...", str(self.name))
131
syslogger.setFormatter(logging.Formatter\
132
('Mandos (%s): %%(levelname)s:'
133
' %%(message)s' % self.name))
167
134
self.remove()
168
135
self.add()
169
136
self.rename_count += 1
170
137
def remove(self):
171
138
"""Derived from the Avahi example code"""
172
if self.group is not None:
173
self.group.Reset()
139
if group is not None:
140
group.Reset()
174
141
def add(self):
175
142
"""Derived from the Avahi example code"""
176
if self.group is None:
177
self.group = dbus.Interface(
178
self.bus.get_object(avahi.DBUS_NAME,
179
self.server.EntryGroupNew()),
180
avahi.DBUS_INTERFACE_ENTRY_GROUP)
181
self.group.connect_to_signal('StateChanged',
182
self
183
.entry_group_state_changed)
184
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
185
self.name, self.type)
186
self.group.AddService(
187
self.interface,
188
self.protocol,
189
dbus.UInt32(0), # flags
190
self.name, self.type,
191
self.domain, self.host,
192
dbus.UInt16(self.port),
193
avahi.string_array_to_txt_array(self.TXT))
194
self.group.Commit()
195
def entry_group_state_changed(self, state, error):
196
"""Derived from the Avahi example code"""
197
logger.debug(u"Avahi state change: %i", state)
198
199
if state == avahi.ENTRY_GROUP_ESTABLISHED:
200
logger.debug(u"Zeroconf service established.")
201
elif state == avahi.ENTRY_GROUP_COLLISION:
202
logger.warning(u"Zeroconf service name collision.")
203
self.rename()
204
elif state == avahi.ENTRY_GROUP_FAILURE:
205
logger.critical(u"Avahi: Error in group state changed %s",
206
unicode(error))
207
raise AvahiGroupError(u"State changed: %s"
208
% unicode(error))
209
def cleanup(self):
210
"""Derived from the Avahi example code"""
211
if self.group is not None:
212
self.group.Free()
213
self.group = None
214
def server_state_changed(self, state):
215
"""Derived from the Avahi example code"""
216
if state == avahi.SERVER_COLLISION:
217
logger.error(u"Zeroconf server name collision")
218
self.remove()
219
elif state == avahi.SERVER_RUNNING:
220
self.add()
221
def activate(self):
222
"""Derived from the Avahi example code"""
223
if self.server is None:
224
self.server = dbus.Interface(
225
self.bus.get_object(avahi.DBUS_NAME,
226
avahi.DBUS_PATH_SERVER),
227
avahi.DBUS_INTERFACE_SERVER)
228
self.server.connect_to_signal(u"StateChanged",
229
self.server_state_changed)
230
self.server_state_changed(self.server.GetState())
143
global group
144
if group is None:
145
group = dbus.Interface\
146
(bus.get_object(avahi.DBUS_NAME,
147
server.EntryGroupNew()),
148
avahi.DBUS_INTERFACE_ENTRY_GROUP)
149
group.connect_to_signal('StateChanged',
150
entry_group_state_changed)
151
logger.debug(u"Adding service '%s' of type '%s' ...",
152
service.name, service.type)
153
group.AddService(
154
self.interface, # interface
155
avahi.PROTO_INET6, # protocol
156
dbus.UInt32(0), # flags
157
self.name, self.type,
158
self.domain, self.host,
159
dbus.UInt16(self.port),
160
avahi.string_array_to_txt_array(self.TXT))
161
group.Commit()
162
163
# From the Avahi example code:
164
group = None # our entry group
165
# End of Avahi example code
231
166
232
167
233
168
class Client(object):
234
169
"""A representation of a client host served by this server.
235
236
170
Attributes:
237
name: string; from the config file, used in log messages and
238
D-Bus identifiers
171
name: string; from the config file, used in log messages
239
172
fingerprint: string (40 or 32 hexadecimal digits); used to
240
173
uniquely identify the client
241
secret: bytestring; sent verbatim (over TLS) to client
242
host: string; available for use by the checker command
243
created: datetime.datetime(); (UTC) object creation
244
last_enabled: datetime.datetime(); (UTC)
245
enabled: bool()
246
last_checked_ok: datetime.datetime(); (UTC) or None
247
timeout: datetime.timedelta(); How long from last_checked_ok
248
until this client is disabled
249
interval: datetime.timedelta(); How often to start a new checker
250
disable_hook: If set, called by disable() as disable_hook(self)
251
checker: subprocess.Popen(); a running checker process used
252
to see if the client lives.
253
'None' if no process is running.
174
secret: bytestring; sent verbatim (over TLS) to client
175
host: string; available for use by the checker command
176
created: datetime.datetime(); object creation, not client host
177
last_checked_ok: datetime.datetime() or None if not yet checked OK
178
timeout: datetime.timedelta(); How long from last_checked_ok
179
until this client is invalid
180
interval: datetime.timedelta(); How often to start a new checker
181
stop_hook: If set, called by stop() as stop_hook(self)
182
checker: subprocess.Popen(); a running checker process used
183
to see if the client lives.
184
'None' if no process is running.
254
185
checker_initiator_tag: a gobject event source tag, or None
255
disable_initiator_tag: - '' -
186
stop_initiator_tag: - '' -
256
187
checker_callback_tag: - '' -
257
188
checker_command: string; External command which is run to check if
258
189
client lives. %() expansions are done at
259
190
runtime with vars(self) as dict, so that for
260
191
instance %(name)s can be used in the command.
261
current_checker_command: string; current running checker_command
262
approved_delay: datetime.timedelta(); Time to wait for approval
263
_approved: bool(); 'None' if not yet approved/disapproved
264
approved_duration: datetime.timedelta(); Duration of one approval
192
Private attibutes:
193
_timeout: Real variable for 'timeout'
194
_interval: Real variable for 'interval'
195
_timeout_milliseconds: Used when calling gobject.timeout_add()
196
_interval_milliseconds: - '' -
265
197
"""
266
267
@staticmethod
268
def _timedelta_to_milliseconds(td):
269
"Convert a datetime.timedelta() to milliseconds"
270
return ((td.days * 24 * 60 * 60 * 1000)
271
+ (td.seconds * 1000)
272
+ (td.microseconds // 1000))
273
274
def timeout_milliseconds(self):
275
"Return the 'timeout' attribute in milliseconds"
276
return self._timedelta_to_milliseconds(self.timeout)
277
278
def interval_milliseconds(self):
279
"Return the 'interval' attribute in milliseconds"
280
return self._timedelta_to_milliseconds(self.interval)
281
282
def approved_delay_milliseconds(self):
283
return self._timedelta_to_milliseconds(self.approved_delay)
284
285
def __init__(self, name = None, disable_hook=None, config=None):
198
def _set_timeout(self, timeout):
199
"Setter function for 'timeout' attribute"
200
self._timeout = timeout
201
self._timeout_milliseconds = ((self.timeout.days
202
* 24 * 60 * 60 * 1000)
203
+ (self.timeout.seconds * 1000)
204
+ (self.timeout.microseconds
205
// 1000))
206
timeout = property(lambda self: self._timeout,
207
_set_timeout)
208
del _set_timeout
209
def _set_interval(self, interval):
210
"Setter function for 'interval' attribute"
211
self._interval = interval
212
self._interval_milliseconds = ((self.interval.days
213
* 24 * 60 * 60 * 1000)
214
+ (self.interval.seconds
215
* 1000)
216
+ (self.interval.microseconds
217
// 1000))
218
interval = property(lambda self: self._interval,
219
_set_interval)
220
del _set_interval
221
def __init__(self, name = None, stop_hook=None, config={}):
286
222
"""Note: the 'checker' key in 'config' sets the
287
223
'checker_command' attribute and *not* the 'checker'
288
224
attribute."""
289
225
self.name = name
290
if config is None:
291
config = {}
292
226
logger.debug(u"Creating client %r", self.name)
293
227
# Uppercase and remove spaces from fingerprint for later
294
228
# comparison purposes with return value from the fingerprint()
295
229
# function
296
self.fingerprint = (config[u"fingerprint"].upper()
297
.replace(u" ", u""))
230
self.fingerprint = config["fingerprint"].upper()\
231
.replace(u" ", u"")
298
232
logger.debug(u" Fingerprint: %s", self.fingerprint)
299
if u"secret" in config:
300
self.secret = config[u"secret"].decode(u"base64")
301
elif u"secfile" in config:
302
with open(os.path.expanduser(os.path.expandvars
303
(config[u"secfile"])),
304
"rb") as secfile:
305
self.secret = secfile.read()
233
if "secret" in config:
234
self.secret = config["secret"].decode(u"base64")
235
elif "secfile" in config:
236
sf = open(config["secfile"])
237
self.secret = sf.read()
238
sf.close()
306
239
else:
307
240
raise TypeError(u"No secret or secfile for client %s"
308
241
% self.name)
309
self.host = config.get(u"host", u"")
310
self.created = datetime.datetime.utcnow()
311
self.enabled = False
312
self.last_enabled = None
242
self.host = config.get("host", "")
243
self.created = datetime.datetime.now()
313
244
self.last_checked_ok = None
314
self.timeout = string_to_delta(config[u"timeout"])
315
self.interval = string_to_delta(config[u"interval"])
316
self.disable_hook = disable_hook
245
self.timeout = string_to_delta(config["timeout"])
246
self.interval = string_to_delta(config["interval"])
247
self.stop_hook = stop_hook
317
248
self.checker = None
318
249
self.checker_initiator_tag = None
319
self.disable_initiator_tag = None
250
self.stop_initiator_tag = None
320
251
self.checker_callback_tag = None
321
self.checker_command = config[u"checker"]
322
self.current_checker_command = None
323
self.last_connect = None
324
self._approved = None
325
self.approved_by_default = config.get(u"approved_by_default",
326
True)
327
self.approvals_pending = 0
328
self.approved_delay = string_to_delta(
329
config[u"approved_delay"])
330
self.approved_duration = string_to_delta(
331
config[u"approved_duration"])
332
self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())
333
334
def send_changedstate(self):
335
self.changedstate.acquire()
336
self.changedstate.notify_all()
337
self.changedstate.release()
338
339
def enable(self):
252
self.check_command = config["checker"]
253
def start(self):
340
254
"""Start this client's checker and timeout hooks"""
341
if getattr(self, u"enabled", False):
342
# Already enabled
343
return
344
self.send_changedstate()
345
self.last_enabled = datetime.datetime.utcnow()
346
255
# Schedule a new checker to be started an 'interval' from now,
347
256
# and every interval from then on.
348
self.checker_initiator_tag = (gobject.timeout_add
349
(self.interval_milliseconds(),
350
self.start_checker))
351
# Schedule a disable() when 'timeout' has passed
352
self.disable_initiator_tag = (gobject.timeout_add
353
(self.timeout_milliseconds(),
354
self.disable))
355
self.enabled = True
257
self.checker_initiator_tag = gobject.timeout_add\
258
(self._interval_milliseconds,
259
self.start_checker)
356
260
# Also start a new checker *right now*.
357
261
self.start_checker()
358
359
def disable(self, quiet=True):
360
"""Disable this client."""
361
if not getattr(self, "enabled", False):
262
# Schedule a stop() when 'timeout' has passed
263
self.stop_initiator_tag = gobject.timeout_add\
264
(self._timeout_milliseconds,
265
self.stop)
266
def stop(self):
267
"""Stop this client.
268
The possibility that a client might be restarted is left open,
269
but not currently used."""
270
# If this client doesn't have a secret, it is already stopped.
271
if hasattr(self, "secret") and self.secret:
272
logger.info(u"Stopping client %s", self.name)
273
self.secret = None
274
else:
362
275
return False
363
if not quiet:
364
self.send_changedstate()
365
if not quiet:
366
logger.info(u"Disabling client %s", self.name)
367
if getattr(self, u"disable_initiator_tag", False):
368
gobject.source_remove(self.disable_initiator_tag)
369
self.disable_initiator_tag = None
370
if getattr(self, u"checker_initiator_tag", False):
276
if getattr(self, "stop_initiator_tag", False):
277
gobject.source_remove(self.stop_initiator_tag)
278
self.stop_initiator_tag = None
279
if getattr(self, "checker_initiator_tag", False):
371
280
gobject.source_remove(self.checker_initiator_tag)
372
281
self.checker_initiator_tag = None
373
282
self.stop_checker()
374
if self.disable_hook:
375
self.disable_hook(self)
376
self.enabled = False
283
if self.stop_hook:
284
self.stop_hook(self)
377
285
# Do not run this again if called by a gobject.timeout_add
378
286
return False
379
380
287
def __del__(self):
381
self.disable_hook = None
382
self.disable()
383
384
def checker_callback(self, pid, condition, command):
288
self.stop_hook = None
289
self.stop()
290
def checker_callback(self, pid, condition):
385
291
"""The checker has completed, so take appropriate actions."""
292
now = datetime.datetime.now()
386
293
self.checker_callback_tag = None
387
294
self.checker = None
388
if os.WIFEXITED(condition):
389
exitstatus = os.WEXITSTATUS(condition)
390
if exitstatus == 0:
391
logger.info(u"Checker for %(name)s succeeded",
392
vars(self))
393
self.checked_ok()
394
else:
395
logger.info(u"Checker for %(name)s failed",
396
vars(self))
397
else:
295
if os.WIFEXITED(condition) \
296
and (os.WEXITSTATUS(condition) == 0):
297
logger.info(u"Checker for %(name)s succeeded",
298
vars(self))
299
self.last_checked_ok = now
300
gobject.source_remove(self.stop_initiator_tag)
301
self.stop_initiator_tag = gobject.timeout_add\
302
(self._timeout_milliseconds,
303
self.stop)
304
elif not os.WIFEXITED(condition):
398
305
logger.warning(u"Checker for %(name)s crashed?",
399
306
vars(self))
400
401
def checked_ok(self):
402
"""Bump up the timeout for this client.
403
404
This should only be called when the client has been seen,
405
alive and well.
406
"""
407
self.last_checked_ok = datetime.datetime.utcnow()
408
gobject.source_remove(self.disable_initiator_tag)
409
self.disable_initiator_tag = (gobject.timeout_add
410
(self.timeout_milliseconds(),
411
self.disable))
412
307
else:
308
logger.info(u"Checker for %(name)s failed",
309
vars(self))
413
310
def start_checker(self):
414
311
"""Start a new checker subprocess if one is not running.
415
416
312
If a checker already exists, leave it running and do
417
313
nothing."""
418
314
# The reason for not killing a running checker is that if we
421
317
# client would inevitably timeout, since no checker would get
422
318
# a chance to run to completion. If we instead leave running
423
319
# checkers alone, the checker would have to take more time
424
# than 'timeout' for the client to be disabled, which is as it
425
# should be.
426
427
# If a checker exists, make sure it is not a zombie
428
try:
429
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
430
except (AttributeError, OSError), error:
431
if (isinstance(error, OSError)
432
and error.errno != errno.ECHILD):
433
raise error
434
else:
435
if pid:
436
logger.warning(u"Checker was a zombie")
437
gobject.source_remove(self.checker_callback_tag)
438
self.checker_callback(pid, status,
439
self.current_checker_command)
440
# Start a new checker if needed
320
# than 'timeout' for the client to be declared invalid, which
321
# is as it should be.
441
322
if self.checker is None:
442
323
try:
443
# In case checker_command has exactly one % operator
444
command = self.checker_command % self.host
324
# In case check_command has exactly one % operator
325
command = self.check_command % self.host
445
326
except TypeError:
446
327
# Escape attributes for the shell
447
escaped_attrs = dict((key,
448
re.escape(unicode(str(val),
449
errors=
450
u'replace')))
328
escaped_attrs = dict((key, re.escape(str(val)))
451
329
for key, val in
452
330
vars(self).iteritems())
453
331
try:
454
command = self.checker_command % escaped_attrs
332
command = self.check_command % escaped_attrs
455
333
except TypeError, error:
456
334
logger.error(u'Could not format string "%s":'
457
u' %s', self.checker_command, error)
335
u' %s', self.check_command, error)
458
336
return True # Try again later
459
self.current_checker_command = command
460
337
try:
461
338
logger.info(u"Starting checker %r for %s",
462
339
command, self.name)
466
343
# always replaced by /dev/null.)
467
344
self.checker = subprocess.Popen(command,
468
345
close_fds=True,
469
shell=True, cwd=u"/")
470
self.checker_callback_tag = (gobject.child_watch_add
471
(self.checker.pid,
472
self.checker_callback,
473
data=command))
474
# The checker may have completed before the gobject
475
# watch was added. Check for this.
476
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
477
if pid:
478
gobject.source_remove(self.checker_callback_tag)
479
self.checker_callback(pid, status, command)
346
shell=True, cwd="/")
347
self.checker_callback_tag = gobject.child_watch_add\
348
(self.checker.pid,
349
self.checker_callback)
480
350
except OSError, error:
481
351
logger.error(u"Failed to start subprocess: %s",
482
352
error)
483
353
# Re-run this periodically if run by gobject.timeout_add
484
354
return True
485
486
355
def stop_checker(self):
487
356
"""Force the checker process, if any, to stop."""
488
357
if self.checker_callback_tag:
489
358
gobject.source_remove(self.checker_callback_tag)
490
359
self.checker_callback_tag = None
491
if getattr(self, u"checker", None) is None:
360
if getattr(self, "checker", None) is None:
492
361
return
493
362
logger.debug(u"Stopping checker for %(name)s", vars(self))
494
363
try:
495
364
os.kill(self.checker.pid, signal.SIGTERM)
496
#time.sleep(0.5)
365
#os.sleep(0.5)
497
366
#if self.checker.poll() is None:
498
367
# os.kill(self.checker.pid, signal.SIGKILL)
499
368
except OSError, error:
500
369
if error.errno != errno.ESRCH: # No such process
501
370
raise
502
371
self.checker = None
503
504
def dbus_service_property(dbus_interface, signature=u"v",
505
access=u"readwrite", byte_arrays=False):
506
"""Decorators for marking methods of a DBusObjectWithProperties to
507
become properties on the D-Bus.
508
509
The decorated method will be called with no arguments by "Get"
510
and with one argument by "Set".
511
512
The parameters, where they are supported, are the same as
513
dbus.service.method, except there is only "signature", since the
514
type from Get() and the type sent to Set() is the same.
515
"""
516
# Encoding deeply encoded byte arrays is not supported yet by the
517
# "Set" method, so we fail early here:
518
if byte_arrays and signature != u"ay":
519
raise ValueError(u"Byte arrays not supported for non-'ay'"
520
u" signature %r" % signature)
521
def decorator(func):
522
func._dbus_is_property = True
523
func._dbus_interface = dbus_interface
524
func._dbus_signature = signature
525
func._dbus_access = access
526
func._dbus_name = func.__name__
527
if func._dbus_name.endswith(u"_dbus_property"):
528
func._dbus_name = func._dbus_name[:-14]
529
func._dbus_get_args_options = {u'byte_arrays': byte_arrays }
530
return func
531
return decorator
532
533
534
class DBusPropertyException(dbus.exceptions.DBusException):
535
"""A base class for D-Bus property-related exceptions
536
"""
537
def __unicode__(self):
538
return unicode(str(self))
539
540
541
class DBusPropertyAccessException(DBusPropertyException):
542
"""A property's access permissions disallows an operation.
543
"""
544
pass
545
546
547
class DBusPropertyNotFound(DBusPropertyException):
548
"""An attempt was made to access a non-existing property.
549
"""
550
pass
551
552
553
class DBusObjectWithProperties(dbus.service.Object):
554
"""A D-Bus object with properties.
555
556
Classes inheriting from this can use the dbus_service_property
557
decorator to expose methods as D-Bus properties. It exposes the
558
standard Get(), Set(), and GetAll() methods on the D-Bus.
559
"""
560
561
@staticmethod
562
def _is_dbus_property(obj):
563
return getattr(obj, u"_dbus_is_property", False)
564
565
def _get_all_dbus_properties(self):
566
"""Returns a generator of (name, attribute) pairs
567
"""
568
return ((prop._dbus_name, prop)
569
for name, prop in
570
inspect.getmembers(self, self._is_dbus_property))
571
572
def _get_dbus_property(self, interface_name, property_name):
573
"""Returns a bound method if one exists which is a D-Bus
574
property with the specified name and interface.
575
"""
576
for name in (property_name,
577
property_name + u"_dbus_property"):
578
prop = getattr(self, name, None)
579
if (prop is None
580
or not self._is_dbus_property(prop)
581
or prop._dbus_name != property_name
582
or (interface_name and prop._dbus_interface
583
and interface_name != prop._dbus_interface)):
584
continue
585
return prop
586
# No such property
587
raise DBusPropertyNotFound(self.dbus_object_path + u":"
588
+ interface_name + u"."
589
+ property_name)
590
591
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ss",
592
out_signature=u"v")
593
def Get(self, interface_name, property_name):
594
"""Standard D-Bus property Get() method, see D-Bus standard.
595
"""
596
prop = self._get_dbus_property(interface_name, property_name)
597
if prop._dbus_access == u"write":
598
raise DBusPropertyAccessException(property_name)
599
value = prop()
600
if not hasattr(value, u"variant_level"):
601
return value
602
return type(value)(value, variant_level=value.variant_level+1)
603
604
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ssv")
605
def Set(self, interface_name, property_name, value):
606
"""Standard D-Bus property Set() method, see D-Bus standard.
607
"""
608
prop = self._get_dbus_property(interface_name, property_name)
609
if prop._dbus_access == u"read":
610
raise DBusPropertyAccessException(property_name)
611
if prop._dbus_get_args_options[u"byte_arrays"]:
612
# The byte_arrays option is not supported yet on
613
# signatures other than "ay".
614
if prop._dbus_signature != u"ay":
615
raise ValueError
616
value = dbus.ByteArray(''.join(unichr(byte)
617
for byte in value))
618
prop(value)
619
620
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"s",
621
out_signature=u"a{sv}")
622
def GetAll(self, interface_name):
623
"""Standard D-Bus property GetAll() method, see D-Bus
624
standard.
625
626
Note: Will not include properties with access="write".
627
"""
628
all = {}
629
for name, prop in self._get_all_dbus_properties():
630
if (interface_name
631
and interface_name != prop._dbus_interface):
632
# Interface non-empty but did not match
633
continue
634
# Ignore write-only properties
635
if prop._dbus_access == u"write":
636
continue
637
value = prop()
638
if not hasattr(value, u"variant_level"):
639
all[name] = value
640
continue
641
all[name] = type(value)(value, variant_level=
642
value.variant_level+1)
643
return dbus.Dictionary(all, signature=u"sv")
644
645
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
646
out_signature=u"s",
647
path_keyword='object_path',
648
connection_keyword='connection')
649
def Introspect(self, object_path, connection):
650
"""Standard D-Bus method, overloaded to insert property tags.
651
"""
652
xmlstring = dbus.service.Object.Introspect(self, object_path,
653
connection)
654
try:
655
document = xml.dom.minidom.parseString(xmlstring)
656
def make_tag(document, name, prop):
657
e = document.createElement(u"property")
658
e.setAttribute(u"name", name)
659
e.setAttribute(u"type", prop._dbus_signature)
660
e.setAttribute(u"access", prop._dbus_access)
661
return e
662
for if_tag in document.getElementsByTagName(u"interface"):
663
for tag in (make_tag(document, name, prop)
664
for name, prop
665
in self._get_all_dbus_properties()
666
if prop._dbus_interface
667
== if_tag.getAttribute(u"name")):
668
if_tag.appendChild(tag)
669
# Add the names to the return values for the
670
# "org.freedesktop.DBus.Properties" methods
671
if (if_tag.getAttribute(u"name")
672
== u"org.freedesktop.DBus.Properties"):
673
for cn in if_tag.getElementsByTagName(u"method"):
674
if cn.getAttribute(u"name") == u"Get":
675
for arg in cn.getElementsByTagName(u"arg"):
676
if (arg.getAttribute(u"direction")
677
== u"out"):
678
arg.setAttribute(u"name", u"value")
679
elif cn.getAttribute(u"name") == u"GetAll":
680
for arg in cn.getElementsByTagName(u"arg"):
681
if (arg.getAttribute(u"direction")
682
== u"out"):
683
arg.setAttribute(u"name", u"props")
684
xmlstring = document.toxml(u"utf-8")
685
document.unlink()
686
except (AttributeError, xml.dom.DOMException,
687
xml.parsers.expat.ExpatError), error:
688
logger.error(u"Failed to override Introspection method",
689
error)
690
return xmlstring
691
692
693
class ClientDBus(Client, DBusObjectWithProperties):
694
"""A Client class using D-Bus
695
696
Attributes:
697
dbus_object_path: dbus.ObjectPath
698
bus: dbus.SystemBus()
699
"""
700
# dbus.service.Object doesn't use super(), so we can't either.
701
702
def __init__(self, bus = None, *args, **kwargs):
703
self._approvals_pending = 0
704
self.bus = bus
705
Client.__init__(self, *args, **kwargs)
706
# Only now, when this client is initialized, can it show up on
707
# the D-Bus
708
self.dbus_object_path = (dbus.ObjectPath
709
(u"/clients/"
710
+ self.name.replace(u".", u"_")))
711
DBusObjectWithProperties.__init__(self, self.bus,
712
self.dbus_object_path)
713
714
def _get_approvals_pending(self):
715
return self._approvals_pending
716
def _set_approvals_pending(self, value):
717
old_value = self._approvals_pending
718
self._approvals_pending = value
719
bval = bool(value)
720
if (hasattr(self, "dbus_object_path")
721
and bval is not bool(old_value)):
722
dbus_bool = dbus.Boolean(bval, variant_level=1)
723
self.PropertyChanged(dbus.String(u"approved_pending"),
724
dbus_bool)
725
726
approvals_pending = property(_get_approvals_pending,
727
_set_approvals_pending)
728
del _get_approvals_pending, _set_approvals_pending
729
730
@staticmethod
731
def _datetime_to_dbus(dt, variant_level=0):
732
"""Convert a UTC datetime.datetime() to a D-Bus type."""
733
return dbus.String(dt.isoformat(),
734
variant_level=variant_level)
735
736
def enable(self):
737
oldstate = getattr(self, u"enabled", False)
738
r = Client.enable(self)
739
if oldstate != self.enabled:
740
# Emit D-Bus signals
741
self.PropertyChanged(dbus.String(u"enabled"),
742
dbus.Boolean(True, variant_level=1))
743
self.PropertyChanged(
744
dbus.String(u"last_enabled"),
745
self._datetime_to_dbus(self.last_enabled,
746
variant_level=1))
747
return r
748
749
def disable(self, quiet = False):
750
oldstate = getattr(self, u"enabled", False)
751
r = Client.disable(self, quiet=quiet)
752
if not quiet and oldstate != self.enabled:
753
# Emit D-Bus signal
754
self.PropertyChanged(dbus.String(u"enabled"),
755
dbus.Boolean(False, variant_level=1))
756
return r
757
758
def __del__(self, *args, **kwargs):
759
try:
760
self.remove_from_connection()
761
except LookupError:
762
pass
763
if hasattr(DBusObjectWithProperties, u"__del__"):
764
DBusObjectWithProperties.__del__(self, *args, **kwargs)
765
Client.__del__(self, *args, **kwargs)
766
767
def checker_callback(self, pid, condition, command,
768
*args, **kwargs):
769
self.checker_callback_tag = None
770
self.checker = None
771
# Emit D-Bus signal
772
self.PropertyChanged(dbus.String(u"checker_running"),
773
dbus.Boolean(False, variant_level=1))
774
if os.WIFEXITED(condition):
775
exitstatus = os.WEXITSTATUS(condition)
776
# Emit D-Bus signal
777
self.CheckerCompleted(dbus.Int16(exitstatus),
778
dbus.Int64(condition),
779
dbus.String(command))
780
else:
781
# Emit D-Bus signal
782
self.CheckerCompleted(dbus.Int16(-1),
783
dbus.Int64(condition),
784
dbus.String(command))
785
786
return Client.checker_callback(self, pid, condition, command,
787
*args, **kwargs)
788
789
def checked_ok(self, *args, **kwargs):
790
r = Client.checked_ok(self, *args, **kwargs)
791
# Emit D-Bus signal
792
self.PropertyChanged(
793
dbus.String(u"last_checked_ok"),
794
(self._datetime_to_dbus(self.last_checked_ok,
795
variant_level=1)))
796
return r
797
798
def start_checker(self, *args, **kwargs):
799
old_checker = self.checker
800
if self.checker is not None:
801
old_checker_pid = self.checker.pid
802
else:
803
old_checker_pid = None
804
r = Client.start_checker(self, *args, **kwargs)
805
# Only if new checker process was started
806
if (self.checker is not None
807
and old_checker_pid != self.checker.pid):
808
# Emit D-Bus signal
809
self.CheckerStarted(self.current_checker_command)
810
self.PropertyChanged(
811
dbus.String(u"checker_running"),
812
dbus.Boolean(True, variant_level=1))
813
return r
814
815
def stop_checker(self, *args, **kwargs):
816
old_checker = getattr(self, u"checker", None)
817
r = Client.stop_checker(self, *args, **kwargs)
818
if (old_checker is not None
819
and getattr(self, u"checker", None) is None):
820
self.PropertyChanged(dbus.String(u"checker_running"),
821
dbus.Boolean(False, variant_level=1))
822
return r
823
824
def _reset_approved(self):
825
self._approved = None
826
return False
827
828
def approve(self, value=True):
829
self.send_changedstate()
830
self._approved = value
831
gobject.timeout_add(self._timedelta_to_milliseconds(self.approved_duration),
832
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
Is sent after a successful transfer of secret from the Mandos
863
server to mandos-client
864
"""
865
pass
866
867
# Rejected - signal
868
@dbus.service.signal(_interface, signature=u"s")
869
def Rejected(self, reason):
870
"D-Bus signal"
871
pass
872
873
# NeedApproval - signal
874
@dbus.service.signal(_interface, signature=u"db")
875
def NeedApproval(self, timeout, default):
876
"D-Bus signal"
877
pass
878
879
## Methods
880
881
# Approve - method
882
@dbus.service.method(_interface, in_signature=u"b")
883
def Approve(self, value):
884
self.approve(value)
885
886
# CheckedOK - method
887
@dbus.service.method(_interface)
888
def CheckedOK(self):
889
return self.checked_ok()
890
891
# Enable - method
892
@dbus.service.method(_interface)
893
def Enable(self):
894
"D-Bus method"
895
self.enable()
896
897
# StartChecker - method
898
@dbus.service.method(_interface)
899
def StartChecker(self):
900
"D-Bus method"
901
self.start_checker()
902
903
# Disable - method
904
@dbus.service.method(_interface)
905
def Disable(self):
906
"D-Bus method"
907
self.disable()
908
909
# StopChecker - method
910
@dbus.service.method(_interface)
911
def StopChecker(self):
912
self.stop_checker()
913
914
## Properties
915
916
# approved_pending - property
917
@dbus_service_property(_interface, signature=u"b", access=u"read")
918
def approved_pending_dbus_property(self):
919
return dbus.Boolean(bool(self.approvals_pending))
920
921
# approved_by_default - property
922
@dbus_service_property(_interface, signature=u"b",
923
access=u"readwrite")
924
def approved_by_default_dbus_property(self):
925
return dbus.Boolean(self.approved_by_default)
926
927
# approved_delay - property
928
@dbus_service_property(_interface, signature=u"t",
929
access=u"readwrite")
930
def approved_delay_dbus_property(self):
931
return dbus.UInt64(self.approved_delay_milliseconds())
932
933
# approved_duration - property
934
@dbus_service_property(_interface, signature=u"t",
935
access=u"readwrite")
936
def approved_duration_dbus_property(self):
937
return dbus.UInt64(self._timedelta_to_milliseconds(
938
self.approved_duration))
939
940
# name - property
941
@dbus_service_property(_interface, signature=u"s", access=u"read")
942
def name_dbus_property(self):
943
return dbus.String(self.name)
944
945
# fingerprint - property
946
@dbus_service_property(_interface, signature=u"s", access=u"read")
947
def fingerprint_dbus_property(self):
948
return dbus.String(self.fingerprint)
949
950
# host - property
951
@dbus_service_property(_interface, signature=u"s",
952
access=u"readwrite")
953
def host_dbus_property(self, value=None):
954
if value is None: # get
955
return dbus.String(self.host)
956
self.host = value
957
# Emit D-Bus signal
958
self.PropertyChanged(dbus.String(u"host"),
959
dbus.String(value, variant_level=1))
960
961
# created - property
962
@dbus_service_property(_interface, signature=u"s", access=u"read")
963
def created_dbus_property(self):
964
return dbus.String(self._datetime_to_dbus(self.created))
965
966
# last_enabled - property
967
@dbus_service_property(_interface, signature=u"s", access=u"read")
968
def last_enabled_dbus_property(self):
969
if self.last_enabled is None:
970
return dbus.String(u"")
971
return dbus.String(self._datetime_to_dbus(self.last_enabled))
972
973
# enabled - property
974
@dbus_service_property(_interface, signature=u"b",
975
access=u"readwrite")
976
def enabled_dbus_property(self, value=None):
977
if value is None: # get
978
return dbus.Boolean(self.enabled)
979
if value:
980
self.enable()
981
else:
982
self.disable()
983
984
# last_checked_ok - property
985
@dbus_service_property(_interface, signature=u"s",
986
access=u"readwrite")
987
def last_checked_ok_dbus_property(self, value=None):
988
if value is not None:
989
self.checked_ok()
990
return
372
def still_valid(self):
373
"""Has the timeout not yet passed for this client?"""
374
now = datetime.datetime.now()
991
375
if self.last_checked_ok is None:
992
return dbus.String(u"")
993
return dbus.String(self._datetime_to_dbus(self
994
.last_checked_ok))
995
996
# timeout - property
997
@dbus_service_property(_interface, signature=u"t",
998
access=u"readwrite")
999
def timeout_dbus_property(self, value=None):
1000
if value is None: # get
1001
return dbus.UInt64(self.timeout_milliseconds())
1002
self.timeout = datetime.timedelta(0, 0, 0, value)
1003
# Emit D-Bus signal
1004
self.PropertyChanged(dbus.String(u"timeout"),
1005
dbus.UInt64(value, variant_level=1))
1006
if getattr(self, u"disable_initiator_tag", None) is None:
1007
return
1008
# Reschedule timeout
1009
gobject.source_remove(self.disable_initiator_tag)
1010
self.disable_initiator_tag = None
1011
time_to_die = (self.
1012
_timedelta_to_milliseconds((self
1013
.last_checked_ok
1014
+ self.timeout)
1015
- datetime.datetime
1016
.utcnow()))
1017
if time_to_die <= 0:
1018
# The timeout has passed
1019
self.disable()
1020
else:
1021
self.disable_initiator_tag = (gobject.timeout_add
1022
(time_to_die, self.disable))
1023
1024
# interval - property
1025
@dbus_service_property(_interface, signature=u"t",
1026
access=u"readwrite")
1027
def interval_dbus_property(self, value=None):
1028
if value is None: # get
1029
return dbus.UInt64(self.interval_milliseconds())
1030
self.interval = datetime.timedelta(0, 0, 0, value)
1031
# Emit D-Bus signal
1032
self.PropertyChanged(dbus.String(u"interval"),
1033
dbus.UInt64(value, variant_level=1))
1034
if getattr(self, u"checker_initiator_tag", None) is None:
1035
return
1036
# Reschedule checker run
1037
gobject.source_remove(self.checker_initiator_tag)
1038
self.checker_initiator_tag = (gobject.timeout_add
1039
(value, self.start_checker))
1040
self.start_checker() # Start one now, too
1041
1042
# checker - property
1043
@dbus_service_property(_interface, signature=u"s",
1044
access=u"readwrite")
1045
def checker_dbus_property(self, value=None):
1046
if value is None: # get
1047
return dbus.String(self.checker_command)
1048
self.checker_command = value
1049
# Emit D-Bus signal
1050
self.PropertyChanged(dbus.String(u"checker"),
1051
dbus.String(self.checker_command,
1052
variant_level=1))
1053
1054
# checker_running - property
1055
@dbus_service_property(_interface, signature=u"b",
1056
access=u"readwrite")
1057
def checker_running_dbus_property(self, value=None):
1058
if value is None: # get
1059
return dbus.Boolean(self.checker is not None)
1060
if value:
1061
self.start_checker()
1062
else:
1063
self.stop_checker()
1064
1065
# object_path - property
1066
@dbus_service_property(_interface, signature=u"o", access=u"read")
1067
def object_path_dbus_property(self):
1068
return self.dbus_object_path # is already a dbus.ObjectPath
1069
1070
# secret = property
1071
@dbus_service_property(_interface, signature=u"ay",
1072
access=u"write", byte_arrays=True)
1073
def secret_dbus_property(self, value):
1074
self.secret = str(value)
1075
1076
del _interface
1077
1078
1079
class ProxyClient(object):
1080
def __init__(self, child_pipe, fpr, address):
1081
self._pipe = child_pipe
1082
self._pipe.send(('init', fpr, address))
1083
if not self._pipe.recv():
1084
raise KeyError()
1085
1086
def __getattribute__(self, name):
1087
if(name == '_pipe'):
1088
return super(ProxyClient, self).__getattribute__(name)
1089
self._pipe.send(('getattr', name))
1090
data = self._pipe.recv()
1091
if data[0] == 'data':
1092
return data[1]
1093
if data[0] == 'function':
1094
def func(*args, **kwargs):
1095
self._pipe.send(('funcall', name, args, kwargs))
1096
return self._pipe.recv()[1]
1097
return func
1098
1099
def __setattr__(self, name, value):
1100
if(name == '_pipe'):
1101
return super(ProxyClient, self).__setattr__(name, value)
1102
self._pipe.send(('setattr', name, value))
1103
1104
1105
class ClientHandler(socketserver.BaseRequestHandler, object):
1106
"""A class to handle client connections.
1107
1108
Instantiated once for each connection to handle it.
376
return now < (self.created + self.timeout)
377
else:
378
return now < (self.last_checked_ok + self.timeout)
379
380
381
def peer_certificate(session):
382
"Return the peer's OpenPGP certificate as a bytestring"
383
# If not an OpenPGP certificate...
384
if gnutls.library.functions.gnutls_certificate_type_get\
385
(session._c_object) \
386
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP:
387
# ...do the normal thing
388
return session.peer_certificate
389
list_size = ctypes.c_uint()
390
cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
391
(session._c_object, ctypes.byref(list_size))
392
if list_size.value == 0:
393
return None
394
cert = cert_list[0]
395
return ctypes.string_at(cert.data, cert.size)
396
397
398
def fingerprint(openpgp):
399
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
400
# New GnuTLS "datum" with the OpenPGP public key
401
datum = gnutls.library.types.gnutls_datum_t\
402
(ctypes.cast(ctypes.c_char_p(openpgp),
403
ctypes.POINTER(ctypes.c_ubyte)),
404
ctypes.c_uint(len(openpgp)))
405
# New empty GnuTLS certificate
406
crt = gnutls.library.types.gnutls_openpgp_crt_t()
407
gnutls.library.functions.gnutls_openpgp_crt_init\
408
(ctypes.byref(crt))
409
# Import the OpenPGP public key into the certificate
410
gnutls.library.functions.gnutls_openpgp_crt_import\
411
(crt, 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.
1109
431
Note: This will run in its own forked process."""
1110
432
1111
433
def handle(self):
1112
with contextlib.closing(self.server.child_pipe) as child_pipe:
1113
logger.info(u"TCP connection from: %s",
1114
unicode(self.client_address))
1115
logger.debug(u"Pipe FD: %d",
1116
self.server.child_pipe.fileno())
1117
1118
session = (gnutls.connection
1119
.ClientSession(self.request,
1120
gnutls.connection
1121
.X509Credentials()))
1122
1123
# Note: gnutls.connection.X509Credentials is really a
1124
# generic GnuTLS certificate credentials object so long as
1125
# no X.509 keys are added to it. Therefore, we can use it
1126
# here despite using OpenPGP certificates.
1127
1128
#priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
1129
# u"+AES-256-CBC", u"+SHA1",
1130
# u"+COMP-NULL", u"+CTYPE-OPENPGP",
1131
# u"+DHE-DSS"))
1132
# Use a fallback default, since this MUST be set.
1133
priority = self.server.gnutls_priority
1134
if priority is None:
1135
priority = u"NORMAL"
1136
(gnutls.library.functions
1137
.gnutls_priority_set_direct(session._c_object,
1138
priority, None))
1139
1140
# Start communication using the Mandos protocol
1141
# Get protocol number
1142
line = self.request.makefile().readline()
1143
logger.debug(u"Protocol version: %r", line)
1144
try:
1145
if int(line.strip().split()[0]) > 1:
1146
raise RuntimeError
1147
except (ValueError, IndexError, RuntimeError), error:
1148
logger.error(u"Unknown protocol version: %s", error)
1149
return
1150
1151
# Start GnuTLS connection
1152
try:
1153
session.handshake()
1154
except gnutls.errors.GNUTLSError, error:
1155
logger.warning(u"Handshake failed: %s", error)
1156
# Do not run session.bye() here: the session is not
1157
# established. Just abandon the request.
1158
return
1159
logger.debug(u"Handshake succeeded")
1160
1161
approval_required = False
1162
try:
1163
try:
1164
fpr = self.fingerprint(self.peer_certificate
1165
(session))
1166
except (TypeError, gnutls.errors.GNUTLSError), error:
1167
logger.warning(u"Bad certificate: %s", error)
1168
return
1169
logger.debug(u"Fingerprint: %s", fpr)
1170
1171
try:
1172
client = ProxyClient(child_pipe, fpr,
1173
self.client_address)
1174
except KeyError:
1175
return
1176
1177
if client.approved_delay:
1178
delay = client.approved_delay
1179
client.approvals_pending += 1
1180
approval_required = True
1181
1182
while True:
1183
if not client.enabled:
1184
logger.warning(u"Client %s is disabled",
1185
client.name)
1186
if self.server.use_dbus:
1187
# Emit D-Bus signal
1188
client.Rejected("Disabled")
1189
return
1190
1191
if client._approved or not client.approved_delay:
1192
#We are approved or approval is disabled
1193
break
1194
elif client._approved is None:
1195
logger.info(u"Client %s need approval",
1196
client.name)
1197
if self.server.use_dbus:
1198
# Emit D-Bus signal
1199
client.NeedApproval(
1200
client.approved_delay_milliseconds(),
1201
client.approved_by_default)
1202
else:
1203
logger.warning(u"Client %s was not approved",
1204
client.name)
1205
if self.server.use_dbus:
1206
# Emit D-Bus signal
1207
client.Rejected("Disapproved")
1208
return
1209
1210
#wait until timeout or approved
1211
#x = float(client._timedelta_to_milliseconds(delay))
1212
time = datetime.datetime.now()
1213
client.changedstate.acquire()
1214
client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))
1215
client.changedstate.release()
1216
time2 = datetime.datetime.now()
1217
if (time2 - time) >= delay:
1218
if not client.approved_by_default:
1219
logger.warning("Client %s timed out while"
1220
" waiting for approval",
1221
client.name)
1222
if self.server.use_dbus:
1223
# Emit D-Bus signal
1224
client.Rejected("Time out")
1225
return
1226
else:
1227
break
1228
else:
1229
delay -= time2 - time
1230
1231
sent_size = 0
1232
while sent_size < len(client.secret):
1233
try:
1234
sent = session.send(client.secret[sent_size:])
1235
except (gnutls.errors.GNUTLSError), error:
1236
logger.warning("gnutls send failed")
1237
return
1238
logger.debug(u"Sent: %d, remaining: %d",
1239
sent, len(client.secret)
1240
- (sent_size + sent))
1241
sent_size += sent
1242
1243
logger.info(u"Sending secret to %s", client.name)
1244
# bump the timeout as if seen
1245
client.checked_ok()
1246
if self.server.use_dbus:
1247
# Emit D-Bus signal
1248
client.GotSecret()
1249
1250
finally:
1251
if approval_required:
1252
client.approvals_pending -= 1
1253
try:
1254
session.bye()
1255
except (gnutls.errors.GNUTLSError), error:
1256
logger.warning("gnutls bye failed")
1257
1258
@staticmethod
1259
def peer_certificate(session):
1260
"Return the peer's OpenPGP certificate as a bytestring"
1261
# If not an OpenPGP certificate...
1262
if (gnutls.library.functions
1263
.gnutls_certificate_type_get(session._c_object)
1264
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1265
# ...do the normal thing
1266
return session.peer_certificate
1267
list_size = ctypes.c_uint(1)
1268
cert_list = (gnutls.library.functions
1269
.gnutls_certificate_get_peers
1270
(session._c_object, ctypes.byref(list_size)))
1271
if not bool(cert_list) and list_size.value != 0:
1272
raise gnutls.errors.GNUTLSError(u"error getting peer"
1273
u" certificate")
1274
if list_size.value == 0:
1275
return None
1276
cert = cert_list[0]
1277
return ctypes.string_at(cert.data, cert.size)
1278
1279
@staticmethod
1280
def fingerprint(openpgp):
1281
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1282
# New GnuTLS "datum" with the OpenPGP public key
1283
datum = (gnutls.library.types
1284
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1285
ctypes.POINTER
1286
(ctypes.c_ubyte)),
1287
ctypes.c_uint(len(openpgp))))
1288
# New empty GnuTLS certificate
1289
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1290
(gnutls.library.functions
1291
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1292
# Import the OpenPGP public key into the certificate
1293
(gnutls.library.functions
1294
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1295
gnutls.library.constants
1296
.GNUTLS_OPENPGP_FMT_RAW))
1297
# Verify the self signature in the key
1298
crtverify = ctypes.c_uint()
1299
(gnutls.library.functions
1300
.gnutls_openpgp_crt_verify_self(crt, 0,
1301
ctypes.byref(crtverify)))
1302
if crtverify.value != 0:
1303
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1304
raise (gnutls.errors.CertificateSecurityError
1305
(u"Verify failed"))
1306
# New buffer for the fingerprint
1307
buf = ctypes.create_string_buffer(20)
1308
buf_len = ctypes.c_size_t()
1309
# Get the fingerprint from the certificate into the buffer
1310
(gnutls.library.functions
1311
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1312
ctypes.byref(buf_len)))
1313
# Deinit the certificate
1314
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1315
# Convert the buffer to a Python bytestring
1316
fpr = ctypes.string_at(buf, buf_len.value)
1317
# Convert the bytestring to hexadecimal notation
1318
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
1319
return hex_fpr
1320
1321
1322
class MultiprocessingMixIn(object):
1323
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1324
def sub_process_main(self, request, address):
1325
try:
1326
self.finish_request(request, address)
1327
except:
1328
self.handle_error(request, address)
1329
self.close_request(request)
1330
1331
def process_request(self, request, address):
1332
"""Start a new process to process the request."""
1333
multiprocessing.Process(target = self.sub_process_main,
1334
args = (request, address)).start()
1335
1336
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1337
""" adds a pipe to the MixIn """
1338
def process_request(self, request, client_address):
1339
"""Overrides and wraps the original process_request().
1340
1341
This function creates a new pipe in self.pipe
1342
"""
1343
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1344
1345
super(MultiprocessingMixInWithPipe,
1346
self).process_request(request, client_address)
1347
self.child_pipe.close()
1348
self.add_pipe(parent_pipe)
1349
1350
def add_pipe(self, parent_pipe):
1351
"""Dummy function; override as necessary"""
1352
pass
1353
1354
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1355
socketserver.TCPServer, object):
1356
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1357
434
logger.info(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.warning(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.warning(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.warning(u"Client not found for fingerprint: %s",
484
fpr)
485
session.bye()
486
return
487
# Have to check if client.still_valid(), since it is possible
488
# that the client timed out while establishing the GnuTLS
489
# session.
490
if not client.still_valid():
491
logger.warning(u"Client %(name)s is invalid",
492
vars(client))
493
session.bye()
494
return
495
sent_size = 0
496
while sent_size < len(client.secret):
497
sent = session.send(client.secret[sent_size:])
498
logger.debug(u"Sent: %d, remaining: %d",
499
sent, len(client.secret)
500
- (sent_size + sent))
501
sent_size += sent
502
session.bye()
503
504
505
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
506
"""IPv6 TCP server. Accepts 'None' as address and/or port.
1358
507
Attributes:
1359
enabled: Boolean; whether this server is activated yet
1360
interface: None or a network interface name (string)
1361
use_ipv6: Boolean; to use IPv6 or not
508
settings: Server settings
509
clients: Set() of Client objects
1362
510
"""
1363
def __init__(self, server_address, RequestHandlerClass,
1364
interface=None, use_ipv6=True):
1365
self.interface = interface
1366
if use_ipv6:
1367
self.address_family = socket.AF_INET6
1368
socketserver.TCPServer.__init__(self, server_address,
1369
RequestHandlerClass)
511
address_family = socket.AF_INET6
512
def __init__(self, *args, **kwargs):
513
if "settings" in kwargs:
514
self.settings = kwargs["settings"]
515
del kwargs["settings"]
516
if "clients" in kwargs:
517
self.clients = kwargs["clients"]
518
del kwargs["clients"]
519
return super(type(self), self).__init__(*args, **kwargs)
1370
520
def server_bind(self):
1371
521
"""This overrides the normal server_bind() function
1372
522
to bind to an interface if one was specified, and also NOT to
1373
523
bind to an address or port if they were not specified."""
1374
if self.interface is not None:
1375
if SO_BINDTODEVICE is None:
1376
logger.error(u"SO_BINDTODEVICE does not exist;"
1377
u" cannot bind to interface %s",
1378
self.interface)
1379
else:
1380
try:
1381
self.socket.setsockopt(socket.SOL_SOCKET,
1382
SO_BINDTODEVICE,
1383
str(self.interface
1384
+ u'\0'))
1385
except socket.error, error:
1386
if error[0] == errno.EPERM:
1387
logger.error(u"No permission to"
1388
u" bind to interface %s",
1389
self.interface)
1390
elif error[0] == errno.ENOPROTOOPT:
1391
logger.error(u"SO_BINDTODEVICE not available;"
1392
u" cannot bind to interface %s",
1393
self.interface)
1394
else:
1395
raise
524
if self.settings["interface"]:
525
# 25 is from /usr/include/asm-i486/socket.h
526
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
527
try:
528
self.socket.setsockopt(socket.SOL_SOCKET,
529
SO_BINDTODEVICE,
530
self.settings["interface"])
531
except socket.error, error:
532
if error[0] == errno.EPERM:
533
logger.error(u"No permission to"
534
u" bind to interface %s",
535
self.settings["interface"])
536
else:
537
raise error
1396
538
# Only bind(2) the socket if we really need to.
1397
539
if self.server_address[0] or self.server_address[1]:
1398
540
if not self.server_address[0]:
1399
if self.address_family == socket.AF_INET6:
1400
any_address = u"::" # in6addr_any
1401
else:
1402
any_address = socket.INADDR_ANY
1403
self.server_address = (any_address,
541
in6addr_any = "::"
542
self.server_address = (in6addr_any,
1404
543
self.server_address[1])
1405
544
elif not self.server_address[1]:
1406
545
self.server_address = (self.server_address[0],
1407
546
0)
1408
# if self.interface:
547
# if self.settings["interface"]:
1409
548
# self.server_address = (self.server_address[0],
1410
549
# 0, # port
1411
550
# 0, # flowinfo
1412
551
# if_nametoindex
1413
# (self.interface))
1414
return socketserver.TCPServer.server_bind(self)
1415
1416
1417
class MandosServer(IPv6_TCPServer):
1418
"""Mandos server.
1419
1420
Attributes:
1421
clients: set of Client objects
1422
gnutls_priority GnuTLS priority string
1423
use_dbus: Boolean; to emit D-Bus signals or not
1424
1425
Assumes a gobject.MainLoop event loop.
1426
"""
1427
def __init__(self, server_address, RequestHandlerClass,
1428
interface=None, use_ipv6=True, clients=None,
1429
gnutls_priority=None, use_dbus=True):
1430
self.enabled = False
1431
self.clients = clients
1432
if self.clients is None:
1433
self.clients = set()
1434
self.use_dbus = use_dbus
1435
self.gnutls_priority = gnutls_priority
1436
IPv6_TCPServer.__init__(self, server_address,
1437
RequestHandlerClass,
1438
interface = interface,
1439
use_ipv6 = use_ipv6)
1440
def server_activate(self):
1441
if self.enabled:
1442
return socketserver.TCPServer.server_activate(self)
1443
def enable(self):
1444
self.enabled = True
1445
def add_pipe(self, parent_pipe):
1446
# Call "handle_ipc" for both data and EOF events
1447
gobject.io_add_watch(parent_pipe.fileno(),
1448
gobject.IO_IN | gobject.IO_HUP,
1449
functools.partial(self.handle_ipc,
1450
parent_pipe = parent_pipe))
1451
1452
def handle_ipc(self, source, condition, parent_pipe=None,
1453
client_object=None):
1454
condition_names = {
1455
gobject.IO_IN: u"IN", # There is data to read.
1456
gobject.IO_OUT: u"OUT", # Data can be written (without
1457
# blocking).
1458
gobject.IO_PRI: u"PRI", # There is urgent data to read.
1459
gobject.IO_ERR: u"ERR", # Error condition.
1460
gobject.IO_HUP: u"HUP" # Hung up (the connection has been
1461
# broken, usually for pipes and
1462
# sockets).
1463
}
1464
conditions_string = ' | '.join(name
1465
for cond, name in
1466
condition_names.iteritems()
1467
if cond & condition)
1468
logger.debug(u"Handling IPC: FD = %d, condition = %s", source,
1469
conditions_string)
1470
1471
# error or the other end of multiprocessing.Pipe has closed
1472
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
1473
return False
1474
1475
# Read a request from the child
1476
request = parent_pipe.recv()
1477
logger.debug(u"IPC request: %s", repr(request))
1478
command = request[0]
1479
1480
if command == 'init':
1481
fpr = request[1]
1482
address = request[2]
1483
1484
for c in self.clients:
1485
if c.fingerprint == fpr:
1486
client = c
1487
break
1488
else:
1489
logger.warning(u"Client not found for fingerprint: %s, ad"
1490
u"dress: %s", fpr, address)
1491
if self.use_dbus:
1492
# Emit D-Bus signal
1493
mandos_dbus_service.ClientNotFound(fpr, address)
1494
parent_pipe.send(False)
1495
return False
1496
1497
gobject.io_add_watch(parent_pipe.fileno(),
1498
gobject.IO_IN | gobject.IO_HUP,
1499
functools.partial(self.handle_ipc,
1500
parent_pipe = parent_pipe,
1501
client_object = client))
1502
parent_pipe.send(True)
1503
# remove the old hook in favor of the new above hook on same fileno
1504
return False
1505
if command == 'funcall':
1506
funcname = request[1]
1507
args = request[2]
1508
kwargs = request[3]
1509
1510
parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))
1511
1512
if command == 'getattr':
1513
attrname = request[1]
1514
if callable(client_object.__getattribute__(attrname)):
1515
parent_pipe.send(('function',))
1516
else:
1517
parent_pipe.send(('data', client_object.__getattribute__(attrname)))
1518
1519
if command == 'setattr':
1520
attrname = request[1]
1521
value = request[2]
1522
setattr(client_object, attrname, value)
1523
1524
return True
552
# (self.settings
553
# ["interface"]))
554
return super(type(self), self).server_bind()
1525
555
1526
556
1527
557
def string_to_delta(interval):
1528
558
"""Parse a string and return a datetime.timedelta
1529
1530
>>> string_to_delta(u'7d')
559
560
>>> string_to_delta('7d')
1531
561
datetime.timedelta(7)
1532
>>> string_to_delta(u'60s')
562
>>> string_to_delta('60s')
1533
563
datetime.timedelta(0, 60)
1534
>>> string_to_delta(u'60m')
564
>>> string_to_delta('60m')
1535
565
datetime.timedelta(0, 3600)
1536
>>> string_to_delta(u'24h')
566
>>> string_to_delta('24h')
1537
567
datetime.timedelta(1)
1538
568
>>> string_to_delta(u'1w')
1539
569
datetime.timedelta(7)
1540
>>> string_to_delta(u'5m 30s')
570
>>> string_to_delta('5m 30s')
1541
571
datetime.timedelta(0, 330)
1542
572
"""
1543
573
timevalue = datetime.timedelta(0)
1544
574
for s in interval.split():
1545
575
try:
1546
suffix = unicode(s[-1])
1547
value = int(s[:-1])
576
suffix=unicode(s[-1])
577
value=int(s[:-1])
1548
578
if suffix == u"d":
1549
579
delta = datetime.timedelta(value)
1550
580
elif suffix == u"s":
1556
586
elif suffix == u"w":
1557
587
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1558
588
else:
1559
raise ValueError(u"Unknown suffix %r" % suffix)
1560
except (ValueError, IndexError), e:
1561
raise ValueError(e.message)
589
raise ValueError
590
except (ValueError, IndexError):
591
raise ValueError
1562
592
timevalue += delta
1563
593
return timevalue
1564
594
1565
595
596
def server_state_changed(state):
597
"""Derived from the Avahi example code"""
598
if state == avahi.SERVER_COLLISION:
599
logger.error(u"Server name collision")
600
service.remove()
601
elif state == avahi.SERVER_RUNNING:
602
service.add()
603
604
605
def entry_group_state_changed(state, error):
606
"""Derived from the Avahi example code"""
607
logger.debug(u"state change: %i", state)
608
609
if state == avahi.ENTRY_GROUP_ESTABLISHED:
610
logger.debug(u"Service established.")
611
elif state == avahi.ENTRY_GROUP_COLLISION:
612
logger.warning(u"Service name collision.")
613
service.rename()
614
elif state == avahi.ENTRY_GROUP_FAILURE:
615
logger.critical(u"Error in group state changed %s",
616
unicode(error))
617
raise AvahiGroupError("State changed: %s", str(error))
618
1566
619
def if_nametoindex(interface):
1567
"""Call the C function if_nametoindex(), or equivalent
1568
1569
Note: This function cannot accept a unicode string."""
620
"""Call the C function if_nametoindex(), or equivalent"""
1570
621
global if_nametoindex
1571
622
try:
1572
if_nametoindex = (ctypes.cdll.LoadLibrary
1573
(ctypes.util.find_library(u"c"))
1574
.if_nametoindex)
623
if "ctypes.util" not in sys.modules:
624
import ctypes.util
625
if_nametoindex = ctypes.cdll.LoadLibrary\
626
(ctypes.util.find_library("c")).if_nametoindex
1575
627
except (OSError, AttributeError):
1576
logger.warning(u"Doing if_nametoindex the hard way")
628
if "struct" not in sys.modules:
629
import struct
630
if "fcntl" not in sys.modules:
631
import fcntl
1577
632
def if_nametoindex(interface):
1578
633
"Get an interface index the hard way, i.e. using fcntl()"
1579
634
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1580
with contextlib.closing(socket.socket()) as s:
1581
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1582
struct.pack(str(u"16s16x"),
1583
interface))
1584
interface_index = struct.unpack(str(u"I"),
1585
ifreq[16:20])[0]
635
s = socket.socket()
636
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
637
struct.pack("16s16x", interface))
638
s.close()
639
interface_index = struct.unpack("I", ifreq[16:20])[0]
1586
640
return interface_index
1587
641
return if_nametoindex(interface)
1588
642
1589
643
1590
644
def daemon(nochdir = False, noclose = False):
1591
645
"""See daemon(3). Standard BSD Unix function.
1592
1593
646
This should really exist as os.daemon, but it doesn't (yet)."""
1594
647
if os.fork():
1595
648
sys.exit()
1596
649
os.setsid()
1597
650
if not nochdir:
1598
os.chdir(u"/")
651
os.chdir("/")
1599
652
if os.fork():
1600
653
sys.exit()
1601
654
if not noclose:
1603
656
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1604
657
if not stat.S_ISCHR(os.fstat(null).st_mode):
1605
658
raise OSError(errno.ENODEV,
1606
u"%s not a character device"
1607
% os.path.devnull)
659
"/dev/null not a character device")
1608
660
os.dup2(null, sys.stdin.fileno())
1609
661
os.dup2(null, sys.stdout.fileno())
1610
662
os.dup2(null, sys.stderr.fileno())
1613
665
1614
666
1615
667
def main():
1616
1617
##################################################################
1618
# Parsing of options, both command line and config file
1619
1620
parser = optparse.OptionParser(version = "%%prog %s" % version)
1621
parser.add_option("-i", u"--interface", type=u"string",
1622
metavar="IF", help=u"Bind to interface IF")
1623
parser.add_option("-a", u"--address", type=u"string",
1624
help=u"Address to listen for requests on")
1625
parser.add_option("-p", u"--port", type=u"int",
1626
help=u"Port number to receive requests on")
1627
parser.add_option("--check", action=u"store_true",
1628
help=u"Run self-test")
1629
parser.add_option("--debug", action=u"store_true",
1630
help=u"Debug mode; run in foreground and log to"
1631
u" terminal")
1632
parser.add_option("--debuglevel", type=u"string", metavar="Level",
1633
help=u"Debug level for stdout output")
1634
parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1635
u" priority string (see GnuTLS documentation)")
1636
parser.add_option("--servicename", type=u"string",
1637
metavar=u"NAME", help=u"Zeroconf service name")
1638
parser.add_option("--configdir", type=u"string",
1639
default=u"/etc/mandos", metavar=u"DIR",
1640
help=u"Directory to search for configuration"
1641
u" files")
1642
parser.add_option("--no-dbus", action=u"store_false",
1643
dest=u"use_dbus", help=u"Do not provide D-Bus"
1644
u" system bus interface")
1645
parser.add_option("--no-ipv6", action=u"store_false",
1646
dest=u"use_ipv6", help=u"Do not use IPv6")
1647
options = parser.parse_args()[0]
668
global main_loop_started
669
main_loop_started = False
670
671
parser = OptionParser(version = "%%prog %s" % version)
672
parser.add_option("-i", "--interface", type="string",
673
metavar="IF", help="Bind to interface IF")
674
parser.add_option("-a", "--address", type="string",
675
help="Address to listen for requests on")
676
parser.add_option("-p", "--port", type="int",
677
help="Port number to receive requests on")
678
parser.add_option("--check", action="store_true", default=False,
679
help="Run self-test")
680
parser.add_option("--debug", action="store_true",
681
help="Debug mode; run in foreground and log to"
682
" terminal")
683
parser.add_option("--priority", type="string", help="GnuTLS"
684
" priority string (see GnuTLS documentation)")
685
parser.add_option("--servicename", type="string", metavar="NAME",
686
help="Zeroconf service name")
687
parser.add_option("--configdir", type="string",
688
default="/etc/mandos", metavar="DIR",
689
help="Directory to search for configuration"
690
" files")
691
(options, args) = parser.parse_args()
1648
692
1649
693
if options.check:
1650
694
import doctest
1652
696
sys.exit()
1653
697
1654
698
# Default values for config file for server-global settings
1655
server_defaults = { u"interface": u"",
1656
u"address": u"",
1657
u"port": u"",
1658
u"debug": u"False",
1659
u"priority":
1660
u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1661
u"servicename": u"Mandos",
1662
u"use_dbus": u"True",
1663
u"use_ipv6": u"True",
1664
u"debuglevel": u"",
699
server_defaults = { "interface": "",
700
"address": "",
701
"port": "",
702
"debug": "False",
703
"priority":
704
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
705
"servicename": "Mandos",
1665
706
}
1666
707
1667
708
# Parse config file for server-global settings
1668
server_config = configparser.SafeConfigParser(server_defaults)
709
server_config = ConfigParser.SafeConfigParser(server_defaults)
1669
710
del server_defaults
1670
server_config.read(os.path.join(options.configdir,
1671
u"mandos.conf"))
711
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1672
712
# Convert the SafeConfigParser object to a dict
1673
713
server_settings = server_config.defaults()
1674
# Use the appropriate methods on the non-string config options
1675
for option in (u"debug", u"use_dbus", u"use_ipv6"):
1676
server_settings[option] = server_config.getboolean(u"DEFAULT",
1677
option)
1678
if server_settings["port"]:
1679
server_settings["port"] = server_config.getint(u"DEFAULT",
1680
u"port")
714
# Use getboolean on the boolean config option
715
server_settings["debug"] = server_config.getboolean\
716
("DEFAULT", "debug")
1681
717
del server_config
1682
718
1683
719
# Override the settings from the config file with command line
1684
720
# options, if set.
1685
for option in (u"interface", u"address", u"port", u"debug",
1686
u"priority", u"servicename", u"configdir",
1687
u"use_dbus", u"use_ipv6", u"debuglevel"):
721
for option in ("interface", "address", "port", "debug",
722
"priority", "servicename", "configdir"):
1688
723
value = getattr(options, option)
1689
724
if value is not None:
1690
725
server_settings[option] = value
1691
726
del options
1692
# Force all strings to be unicode
1693
for option in server_settings.keys():
1694
if type(server_settings[option]) is str:
1695
server_settings[option] = unicode(server_settings[option])
1696
727
# Now we have our good server settings in "server_settings"
1697
728
1698
##################################################################
1699
1700
# For convenience
1701
debug = server_settings[u"debug"]
1702
debuglevel = server_settings[u"debuglevel"]
1703
use_dbus = server_settings[u"use_dbus"]
1704
use_ipv6 = server_settings[u"use_ipv6"]
1705
1706
if server_settings[u"servicename"] != u"Mandos":
1707
syslogger.setFormatter(logging.Formatter
1708
(u'Mandos (%s) [%%(process)d]:'
1709
u' %%(levelname)s: %%(message)s'
1710
% server_settings[u"servicename"]))
1711
1712
# Parse config file with clients
1713
client_defaults = { u"timeout": u"1h",
1714
u"interval": u"5m",
1715
u"checker": u"fping -q -- %%(host)s",
1716
u"host": u"",
1717
u"approved_delay": u"0s",
1718
u"approved_duration": u"1s",
1719
}
1720
client_config = configparser.SafeConfigParser(client_defaults)
1721
client_config.read(os.path.join(server_settings[u"configdir"],
1722
u"clients.conf"))
1723
1724
global mandos_dbus_service
1725
mandos_dbus_service = None
1726
1727
tcp_server = MandosServer((server_settings[u"address"],
1728
server_settings[u"port"]),
1729
ClientHandler,
1730
interface=server_settings[u"interface"],
1731
use_ipv6=use_ipv6,
1732
gnutls_priority=
1733
server_settings[u"priority"],
1734
use_dbus=use_dbus)
1735
pidfilename = u"/var/run/mandos.pid"
1736
try:
1737
pidfile = open(pidfilename, u"w")
1738
except IOError:
1739
logger.error(u"Could not open file %r", pidfilename)
1740
1741
try:
1742
uid = pwd.getpwnam(u"_mandos").pw_uid
1743
gid = pwd.getpwnam(u"_mandos").pw_gid
1744
except KeyError:
1745
try:
1746
uid = pwd.getpwnam(u"mandos").pw_uid
1747
gid = pwd.getpwnam(u"mandos").pw_gid
1748
except KeyError:
1749
try:
1750
uid = pwd.getpwnam(u"nobody").pw_uid
1751
gid = pwd.getpwnam(u"nobody").pw_gid
1752
except KeyError:
1753
uid = 65534
1754
gid = 65534
1755
try:
1756
os.setgid(gid)
1757
os.setuid(uid)
1758
except OSError, error:
1759
if error[0] != errno.EPERM:
1760
raise error
1761
1762
# Enable all possible GnuTLS debugging
1763
1764
1765
if not debug and not debuglevel:
729
debug = server_settings["debug"]
730
731
if not debug:
1766
732
syslogger.setLevel(logging.WARNING)
1767
733
console.setLevel(logging.WARNING)
1768
if debuglevel:
1769
level = getattr(logging, debuglevel.upper())
1770
syslogger.setLevel(level)
1771
console.setLevel(level)
1772
1773
if debug:
1774
# "Use a log level over 10 to enable all debugging options."
1775
# - GnuTLS manual
1776
gnutls.library.functions.gnutls_global_set_log_level(11)
1777
1778
@gnutls.library.types.gnutls_log_func
1779
def debug_gnutls(level, string):
1780
logger.debug(u"GnuTLS: %s", string[:-1])
1781
1782
(gnutls.library.functions
1783
.gnutls_global_set_log_function(debug_gnutls))
1784
1785
# Redirect stdin so all checkers get /dev/null
1786
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1787
os.dup2(null, sys.stdin.fileno())
1788
if null > 2:
1789
os.close(null)
1790
else:
1791
# No console logging
1792
logger.removeHandler(console)
1793
734
735
if server_settings["servicename"] != "Mandos":
736
syslogger.setFormatter(logging.Formatter\
737
('Mandos (%s): %%(levelname)s:'
738
' %%(message)s'
739
% server_settings["servicename"]))
740
741
# Parse config file with clients
742
client_defaults = { "timeout": "1h",
743
"interval": "5m",
744
"checker": "fping -q -- %(host)s",
745
"host": "",
746
}
747
client_config = ConfigParser.SafeConfigParser(client_defaults)
748
client_config.read(os.path.join(server_settings["configdir"],
749
"clients.conf"))
750
751
global service
752
service = AvahiService(name = server_settings["servicename"],
753
type = "_mandos._tcp", );
754
if server_settings["interface"]:
755
service.interface = if_nametoindex(server_settings["interface"])
1794
756
1795
757
global main_loop
758
global bus
759
global server
1796
760
# From the Avahi example code
1797
761
DBusGMainLoop(set_as_default=True )
1798
762
main_loop = gobject.MainLoop()
1799
763
bus = dbus.SystemBus()
764
server = dbus.Interface(
765
bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
766
avahi.DBUS_INTERFACE_SERVER )
1800
767
# End of Avahi example code
1801
if use_dbus:
1802
try:
1803
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos",
1804
bus, do_not_queue=True)
1805
except dbus.exceptions.NameExistsException, e:
1806
logger.error(unicode(e) + u", disabling D-Bus")
1807
use_dbus = False
1808
server_settings[u"use_dbus"] = False
1809
tcp_server.use_dbus = False
1810
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1811
service = AvahiService(name = server_settings[u"servicename"],
1812
servicetype = u"_mandos._tcp",
1813
protocol = protocol, bus = bus)
1814
if server_settings["interface"]:
1815
service.interface = (if_nametoindex
1816
(str(server_settings[u"interface"])))
1817
1818
if not debug:
768
769
clients = Set()
770
def remove_from_clients(client):
771
clients.remove(client)
772
if not clients:
773
logger.critical(u"No clients left, exiting")
774
sys.exit()
775
776
clients.update(Set(Client(name = section,
777
stop_hook = remove_from_clients,
778
config
779
= dict(client_config.items(section)))
780
for section in client_config.sections()))
781
if not clients:
782
logger.critical(u"No clients defined")
783
sys.exit(1)
784
785
if debug:
786
# Redirect stdin so all checkers get /dev/null
787
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
788
os.dup2(null, sys.stdin.fileno())
789
if null > 2:
790
os.close(null)
791
else:
792
# No console logging
793
logger.removeHandler(console)
1819
794
# Close all input and output, do double fork, etc.
1820
795
daemon()
1821
1822
global multiprocessing_manager
1823
multiprocessing_manager = multiprocessing.Manager()
1824
1825
client_class = Client
1826
if use_dbus:
1827
client_class = functools.partial(ClientDBus, bus = bus)
1828
def client_config_items(config, section):
1829
special_settings = {
1830
"approved_by_default":
1831
lambda: config.getboolean(section,
1832
"approved_by_default"),
1833
}
1834
for name, value in config.items(section):
1835
try:
1836
yield (name, special_settings[name]())
1837
except KeyError:
1838
yield (name, value)
1839
1840
tcp_server.clients.update(set(
1841
client_class(name = section,
1842
config= dict(client_config_items(
1843
client_config, section)))
1844
for section in client_config.sections()))
1845
if not tcp_server.clients:
1846
logger.warning(u"No clients defined")
1847
796
797
pidfilename = "/var/run/mandos/mandos.pid"
798
pid = os.getpid()
1848
799
try:
1849
with pidfile:
1850
pid = os.getpid()
1851
pidfile.write(str(pid) + "\n")
800
pidfile = open(pidfilename, "w")
801
pidfile.write(str(pid) + "\n")
802
pidfile.close()
1852
803
del pidfile
1853
except IOError:
1854
logger.error(u"Could not write to file %r with PID %d",
1855
pidfilename, pid)
1856
except NameError:
1857
# "pidfile" was never created
1858
pass
1859
del pidfilename
804
except IOError, err:
805
logger.error(u"Could not write %s file with PID %d",
806
pidfilename, os.getpid())
807
808
def cleanup():
809
"Cleanup function; run on exit"
810
global group
811
# From the Avahi example code
812
if not group is None:
813
group.Free()
814
group = None
815
# End of Avahi example code
816
817
while clients:
818
client = clients.pop()
819
client.stop_hook = None
820
client.stop()
821
822
atexit.register(cleanup)
1860
823
1861
824
if not debug:
1862
825
signal.signal(signal.SIGINT, signal.SIG_IGN)
1863
826
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1864
827
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1865
828
1866
if use_dbus:
1867
class MandosDBusService(dbus.service.Object):
1868
"""A D-Bus proxy object"""
1869
def __init__(self):
1870
dbus.service.Object.__init__(self, bus, u"/")
1871
_interface = u"se.bsnet.fukt.Mandos"
1872
1873
@dbus.service.signal(_interface, signature=u"o")
1874
def ClientAdded(self, objpath):
1875
"D-Bus signal"
1876
pass
1877
1878
@dbus.service.signal(_interface, signature=u"ss")
1879
def ClientNotFound(self, fingerprint, address):
1880
"D-Bus signal"
1881
pass
1882
1883
@dbus.service.signal(_interface, signature=u"os")
1884
def ClientRemoved(self, objpath, name):
1885
"D-Bus signal"
1886
pass
1887
1888
@dbus.service.method(_interface, out_signature=u"ao")
1889
def GetAllClients(self):
1890
"D-Bus method"
1891
return dbus.Array(c.dbus_object_path
1892
for c in tcp_server.clients)
1893
1894
@dbus.service.method(_interface,
1895
out_signature=u"a{oa{sv}}")
1896
def GetAllClientsWithProperties(self):
1897
"D-Bus method"
1898
return dbus.Dictionary(
1899
((c.dbus_object_path, c.GetAll(u""))
1900
for c in tcp_server.clients),
1901
signature=u"oa{sv}")
1902
1903
@dbus.service.method(_interface, in_signature=u"o")
1904
def RemoveClient(self, object_path):
1905
"D-Bus method"
1906
for c in tcp_server.clients:
1907
if c.dbus_object_path == object_path:
1908
tcp_server.clients.remove(c)
1909
c.remove_from_connection()
1910
# Don't signal anything except ClientRemoved
1911
c.disable(quiet=True)
1912
# Emit D-Bus signal
1913
self.ClientRemoved(object_path, c.name)
1914
return
1915
raise KeyError(object_path)
1916
1917
del _interface
1918
1919
mandos_dbus_service = MandosDBusService()
1920
1921
def cleanup():
1922
"Cleanup function; run on exit"
1923
service.cleanup()
1924
1925
while tcp_server.clients:
1926
client = tcp_server.clients.pop()
1927
if use_dbus:
1928
client.remove_from_connection()
1929
client.disable_hook = None
1930
# Don't signal anything except ClientRemoved
1931
client.disable(quiet=True)
1932
if use_dbus:
1933
# Emit D-Bus signal
1934
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
1935
client.name)
1936
1937
atexit.register(cleanup)
1938
1939
for client in tcp_server.clients:
1940
if use_dbus:
1941
# Emit D-Bus signal
1942
mandos_dbus_service.ClientAdded(client.dbus_object_path)
1943
client.enable()
1944
1945
tcp_server.enable()
1946
tcp_server.server_activate()
1947
829
for client in clients:
830
client.start()
831
832
tcp_server = IPv6_TCPServer((server_settings["address"],
833
server_settings["port"]),
834
tcp_handler,
835
settings=server_settings,
836
clients=clients)
1948
837
# Find out what port we got
1949
838
service.port = tcp_server.socket.getsockname()[1]
1950
if use_ipv6:
1951
logger.info(u"Now listening on address %r, port %d,"
1952
" flowinfo %d, scope_id %d"
1953
% tcp_server.socket.getsockname())
1954
else: # IPv4
1955
logger.info(u"Now listening on address %r, port %d"
1956
% tcp_server.socket.getsockname())
839
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
840
u" scope_id %d" % tcp_server.socket.getsockname())
1957
841
1958
842
#service.interface = tcp_server.socket.getsockname()[3]
1959
843
1960
844
try:
1961
845
# From the Avahi example code
846
server.connect_to_signal("StateChanged", server_state_changed)
1962
847
try:
1963
service.activate()
848
server_state_changed(server.GetState())
1964
849
except dbus.exceptions.DBusException, error:
1965
850
logger.critical(u"DBusException: %s", error)
1966
cleanup()
1967
851
sys.exit(1)
1968
852
# End of Avahi example code
1969
853
1970
854
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
1971
855
lambda *args, **kwargs:
1972
(tcp_server.handle_request
1973
(*args[2:], **kwargs) or True))
856
tcp_server.handle_request\
857
(*args[2:], **kwargs) or True)
1974
858
1975
859
logger.debug(u"Starting main loop")
860
main_loop_started = True
1976
861
main_loop.run()
1977
862
except AvahiError, error:
1978
logger.critical(u"AvahiError: %s", error)
1979
cleanup()
863
logger.critical(u"AvahiError: %s" + unicode(error))
1980
864
sys.exit(1)
1981
865
except KeyboardInterrupt:
1982
866
if debug:
1983
print >> sys.stderr
1984
logger.debug(u"Server received KeyboardInterrupt")
1985
logger.debug(u"Server exiting")
1986
# Must run before the D-Bus bus name gets deregistered
1987
cleanup()
867
print
1988
868
1989
869
if __name__ == '__main__':
1990
870
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0