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- Committer: Teddy Hogeborn
- Date: 2008-08-07 21:45:41 UTC
- Revision ID: teddy@fukt.bsnet.se-20080807214541-pyg8itw6kphz1dy5
* plugbasedclient.c: Renamed to "mandos-client.c". All users changed.
* plugins.d/mandosclient.c: Renamed to "plugins.d/password-request.c".
All users changed.
* plugins.d/passprompt.c: Renamed to "plugins.d/password-prompt.c".
All users changed.
* server.conf: Renamed to "mandos.conf". All users changed.
* server.py: Renamed to "mandos".
(daemon): Have default values for arguments. Caller changed.
* Makefile (distclean, mostlyclean, maintainer-clean): New aliases for
"clean".
(check, run-client, run-server): New.
* network-protocol.txt: New.
* plugins.d/mandosclient.c: Renamed to "plugins.d/password-request.c".
All users changed.
* plugins.d/passprompt.c: Renamed to "plugins.d/password-prompt.c".
All users changed.
* server.conf: Renamed to "mandos.conf". All users changed.
* server.py: Renamed to "mandos".
(daemon): Have default values for arguments. Caller changed.
* Makefile (distclean, mostlyclean, maintainer-clean): New aliases for
"clean".
(check, run-client, run-server): New.
* network-protocol.txt: New.
- files added:
- network-protocol.txt
- files removed:
- .bzr-builddeb
- debian
- debian/po
- files renamed:
- plugin-runner.c => mandos-client.c
- plugins.d/mandos-client.c => plugins.d/password-request.c
- 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
#
17
16
# This program is free software: you can redistribute it and/or modify
18
17
# it under the terms of the GNU General Public License as published by
25
24
# GNU General Public License for more details.
26
25
#
27
26
# You should have received a copy of the GNU General Public License
28
# along with this program. If not, see
29
# <http://www.gnu.org/licenses/>.
27
# along with this program. If not, see <http://www.gnu.org/licenses/>.
30
28
#
31
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# 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
from contextlib import closing
59
import struct
60
import fcntl
61
import functools
62
57
63
58
import dbus
64
import dbus.service
65
59
import gobject
66
60
import avahi
67
61
from dbus.mainloop.glib import DBusGMainLoop
68
62
import ctypes
69
import ctypes.util
70
import xml.dom.minidom
71
import inspect
72
73
try:
74
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
75
except AttributeError:
76
try:
77
from IN import SO_BINDTODEVICE
78
except ImportError:
79
SO_BINDTODEVICE = None
80
81
82
version = "1.0.12"
83
84
logger = logging.Logger(u'mandos')
85
syslogger = (logging.handlers.SysLogHandler
86
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
87
address = "/dev/log"))
88
syslogger.setFormatter(logging.Formatter
89
(u'Mandos [%(process)d]: %(levelname)s:'
90
u' %(message)s'))
63
64
65
logger = logging.Logger('mandos')
66
syslogger = logging.handlers.SysLogHandler\
67
(facility = logging.handlers.SysLogHandler.LOG_DAEMON)
68
syslogger.setFormatter(logging.Formatter\
69
('%(levelname)s: %(message)s'))
91
70
logger.addHandler(syslogger)
71
del syslogger
92
72
93
console = logging.StreamHandler()
94
console.setFormatter(logging.Formatter(u'%(name)s [%(process)d]:'
95
u' %(levelname)s:'
96
u' %(message)s'))
97
logger.addHandler(console)
98
73
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74
class AvahiError(Exception):
100
def __init__(self, value, *args, **kwargs):
75
def __init__(self, value):
101
76
self.value = value
102
super(AvahiError, self).__init__(value, *args, **kwargs)
103
def __unicode__(self):
104
return unicode(repr(self.value))
77
def __str__(self):
78
return repr(self.value)
105
79
106
80
class AvahiServiceError(AvahiError):
107
81
pass
112
86
113
87
class AvahiService(object):
114
88
"""An Avahi (Zeroconf) service.
115
116
89
Attributes:
117
90
interface: integer; avahi.IF_UNSPEC or an interface index.
118
91
Used to optionally bind to the specified interface.
119
name: string; Example: u'Mandos'
120
type: string; Example: u'_mandos._tcp'.
92
name: string; Example: 'Mandos'
93
type: string; Example: '_mandos._tcp'.
121
94
See <http://www.dns-sd.org/ServiceTypes.html>
122
95
port: integer; what port to announce
123
96
TXT: list of strings; TXT record for the service
126
99
max_renames: integer; maximum number of renames
127
100
rename_count: integer; counter so we only rename after collisions
128
101
a sensible number of times
129
group: D-Bus Entry Group
130
server: D-Bus Server
131
bus: dbus.SystemBus()
132
102
"""
133
103
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
134
servicetype = None, port = None, TXT = None,
135
domain = u"", host = u"", max_renames = 32768,
136
protocol = avahi.PROTO_UNSPEC, bus = None):
104
type = None, port = None, TXT = None, domain = "",
105
host = "", max_renames = 12):
137
106
self.interface = interface
138
107
self.name = name
139
self.type = servicetype
108
self.type = type
140
109
self.port = port
141
self.TXT = TXT if TXT is not None else []
110
if TXT is None:
111
self.TXT = []
112
else:
113
self.TXT = TXT
142
114
self.domain = domain
143
115
self.host = host
144
116
self.rename_count = 0
145
self.max_renames = max_renames
146
self.protocol = protocol
147
self.group = None # our entry group
148
self.server = None
149
self.bus = bus
150
117
def rename(self):
151
118
"""Derived from the Avahi example code"""
152
119
if self.rename_count >= self.max_renames:
153
logger.critical(u"No suitable Zeroconf service name found"
154
u" after %i retries, exiting.",
155
self.rename_count)
156
raise AvahiServiceError(u"Too many renames")
157
self.name = self.server.GetAlternativeServiceName(self.name)
158
logger.info(u"Changing Zeroconf service name to %r ...",
159
unicode(self.name))
160
syslogger.setFormatter(logging.Formatter
161
(u'Mandos (%s) [%%(process)d]:'
162
u' %%(levelname)s: %%(message)s'
163
% self.name))
120
logger.critical(u"No suitable service name found after %i"
121
u" retries, exiting.", rename_count)
122
raise AvahiServiceError("Too many renames")
123
name = server.GetAlternativeServiceName(name)
124
logger.error(u"Changing name to %r ...", name)
164
125
self.remove()
165
126
self.add()
166
127
self.rename_count += 1
167
128
def remove(self):
168
129
"""Derived from the Avahi example code"""
169
if self.group is not None:
170
self.group.Reset()
130
if group is not None:
131
group.Reset()
171
132
def add(self):
172
133
"""Derived from the Avahi example code"""
173
if self.group is None:
174
self.group = dbus.Interface(
175
self.bus.get_object(avahi.DBUS_NAME,
176
self.server.EntryGroupNew()),
177
avahi.DBUS_INTERFACE_ENTRY_GROUP)
178
self.group.connect_to_signal('StateChanged',
179
self
180
.entry_group_state_changed)
181
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
182
self.name, self.type)
183
self.group.AddService(
184
self.interface,
185
self.protocol,
186
dbus.UInt32(0), # flags
187
self.name, self.type,
188
self.domain, self.host,
189
dbus.UInt16(self.port),
190
avahi.string_array_to_txt_array(self.TXT))
191
self.group.Commit()
192
def entry_group_state_changed(self, state, error):
193
"""Derived from the Avahi example code"""
194
logger.debug(u"Avahi state change: %i", state)
195
196
if state == avahi.ENTRY_GROUP_ESTABLISHED:
197
logger.debug(u"Zeroconf service established.")
198
elif state == avahi.ENTRY_GROUP_COLLISION:
199
logger.warning(u"Zeroconf service name collision.")
200
self.rename()
201
elif state == avahi.ENTRY_GROUP_FAILURE:
202
logger.critical(u"Avahi: Error in group state changed %s",
203
unicode(error))
204
raise AvahiGroupError(u"State changed: %s"
205
% unicode(error))
206
def cleanup(self):
207
"""Derived from the Avahi example code"""
208
if self.group is not None:
209
self.group.Free()
210
self.group = None
211
def server_state_changed(self, state):
212
"""Derived from the Avahi example code"""
213
if state == avahi.SERVER_COLLISION:
214
logger.error(u"Zeroconf server name collision")
215
self.remove()
216
elif state == avahi.SERVER_RUNNING:
217
self.add()
218
def activate(self):
219
"""Derived from the Avahi example code"""
220
if self.server is None:
221
self.server = dbus.Interface(
222
self.bus.get_object(avahi.DBUS_NAME,
223
avahi.DBUS_PATH_SERVER),
224
avahi.DBUS_INTERFACE_SERVER)
225
self.server.connect_to_signal(u"StateChanged",
226
self.server_state_changed)
227
self.server_state_changed(self.server.GetState())
134
global group
135
if group is None:
136
group = dbus.Interface\
137
(bus.get_object(avahi.DBUS_NAME,
138
server.EntryGroupNew()),
139
avahi.DBUS_INTERFACE_ENTRY_GROUP)
140
group.connect_to_signal('StateChanged',
141
entry_group_state_changed)
142
logger.debug(u"Adding service '%s' of type '%s' ...",
143
service.name, service.type)
144
group.AddService(
145
self.interface, # interface
146
avahi.PROTO_INET6, # protocol
147
dbus.UInt32(0), # flags
148
self.name, self.type,
149
self.domain, self.host,
150
dbus.UInt16(self.port),
151
avahi.string_array_to_txt_array(self.TXT))
152
group.Commit()
153
154
# From the Avahi example code:
155
group = None # our entry group
156
# End of Avahi example code
228
157
229
158
230
159
class Client(object):
231
160
"""A representation of a client host served by this server.
232
233
161
Attributes:
234
name: string; from the config file, used in log messages and
235
D-Bus identifiers
162
name: string; from the config file, used in log messages
236
163
fingerprint: string (40 or 32 hexadecimal digits); used to
237
164
uniquely identify the client
238
secret: bytestring; sent verbatim (over TLS) to client
239
host: string; available for use by the checker command
240
created: datetime.datetime(); (UTC) object creation
241
last_enabled: datetime.datetime(); (UTC)
242
enabled: bool()
243
last_checked_ok: datetime.datetime(); (UTC) or None
244
timeout: datetime.timedelta(); How long from last_checked_ok
245
until this client is invalid
246
interval: datetime.timedelta(); How often to start a new checker
247
disable_hook: If set, called by disable() as disable_hook(self)
248
checker: subprocess.Popen(); a running checker process used
249
to see if the client lives.
250
'None' if no process is running.
165
secret: bytestring; sent verbatim (over TLS) to client
166
fqdn: string (FQDN); available for use by the checker command
167
created: datetime.datetime(); object creation, not client host
168
last_checked_ok: datetime.datetime() or None if not yet checked OK
169
timeout: datetime.timedelta(); How long from last_checked_ok
170
until this client is invalid
171
interval: datetime.timedelta(); How often to start a new checker
172
stop_hook: If set, called by stop() as stop_hook(self)
173
checker: subprocess.Popen(); a running checker process used
174
to see if the client lives.
175
'None' if no process is running.
251
176
checker_initiator_tag: a gobject event source tag, or None
252
disable_initiator_tag: - '' -
177
stop_initiator_tag: - '' -
253
178
checker_callback_tag: - '' -
254
179
checker_command: string; External command which is run to check if
255
180
client lives. %() expansions are done at
256
181
runtime with vars(self) as dict, so that for
257
182
instance %(name)s can be used in the command.
258
current_checker_command: string; current running checker_command
183
Private attibutes:
184
_timeout: Real variable for 'timeout'
185
_interval: Real variable for 'interval'
186
_timeout_milliseconds: Used when calling gobject.timeout_add()
187
_interval_milliseconds: - '' -
259
188
"""
260
261
@staticmethod
262
def _timedelta_to_milliseconds(td):
263
"Convert a datetime.timedelta() to milliseconds"
264
return ((td.days * 24 * 60 * 60 * 1000)
265
+ (td.seconds * 1000)
266
+ (td.microseconds // 1000))
267
268
def timeout_milliseconds(self):
269
"Return the 'timeout' attribute in milliseconds"
270
return self._timedelta_to_milliseconds(self.timeout)
271
272
def interval_milliseconds(self):
273
"Return the 'interval' attribute in milliseconds"
274
return self._timedelta_to_milliseconds(self.interval)
275
276
def __init__(self, name = None, disable_hook=None, config=None):
189
def _set_timeout(self, timeout):
190
"Setter function for 'timeout' attribute"
191
self._timeout = timeout
192
self._timeout_milliseconds = ((self.timeout.days
193
* 24 * 60 * 60 * 1000)
194
+ (self.timeout.seconds * 1000)
195
+ (self.timeout.microseconds
196
// 1000))
197
timeout = property(lambda self: self._timeout,
198
_set_timeout)
199
del _set_timeout
200
def _set_interval(self, interval):
201
"Setter function for 'interval' attribute"
202
self._interval = interval
203
self._interval_milliseconds = ((self.interval.days
204
* 24 * 60 * 60 * 1000)
205
+ (self.interval.seconds
206
* 1000)
207
+ (self.interval.microseconds
208
// 1000))
209
interval = property(lambda self: self._interval,
210
_set_interval)
211
del _set_interval
212
def __init__(self, name = None, stop_hook=None, config={}):
277
213
"""Note: the 'checker' key in 'config' sets the
278
214
'checker_command' attribute and *not* the 'checker'
279
215
attribute."""
280
216
self.name = name
281
if config is None:
282
config = {}
283
217
logger.debug(u"Creating client %r", self.name)
284
218
# Uppercase and remove spaces from fingerprint for later
285
219
# comparison purposes with return value from the fingerprint()
286
220
# function
287
self.fingerprint = (config[u"fingerprint"].upper()
288
.replace(u" ", u""))
221
self.fingerprint = config["fingerprint"].upper()\
222
.replace(u" ", u"")
289
223
logger.debug(u" Fingerprint: %s", self.fingerprint)
290
if u"secret" in config:
291
self.secret = config[u"secret"].decode(u"base64")
292
elif u"secfile" in config:
293
with closing(open(os.path.expanduser
294
(os.path.expandvars
295
(config[u"secfile"])),
296
"rb")) as secfile:
297
self.secret = secfile.read()
224
if "secret" in config:
225
self.secret = config["secret"].decode(u"base64")
226
elif "secfile" in config:
227
sf = open(config["secfile"])
228
self.secret = sf.read()
229
sf.close()
298
230
else:
299
231
raise TypeError(u"No secret or secfile for client %s"
300
232
% self.name)
301
self.host = config.get(u"host", u"")
302
self.created = datetime.datetime.utcnow()
303
self.enabled = False
304
self.last_enabled = None
233
self.fqdn = config.get("fqdn", "")
234
self.created = datetime.datetime.now()
305
235
self.last_checked_ok = None
306
self.timeout = string_to_delta(config[u"timeout"])
307
self.interval = string_to_delta(config[u"interval"])
308
self.disable_hook = disable_hook
236
self.timeout = string_to_delta(config["timeout"])
237
self.interval = string_to_delta(config["interval"])
238
self.stop_hook = stop_hook
309
239
self.checker = None
310
240
self.checker_initiator_tag = None
311
self.disable_initiator_tag = None
241
self.stop_initiator_tag = None
312
242
self.checker_callback_tag = None
313
self.checker_command = config[u"checker"]
314
self.current_checker_command = None
315
self.last_connect = None
316
317
def enable(self):
243
self.check_command = config["checker"]
244
def start(self):
318
245
"""Start this client's checker and timeout hooks"""
319
if getattr(self, u"enabled", False):
320
# Already enabled
321
return
322
self.last_enabled = datetime.datetime.utcnow()
323
246
# Schedule a new checker to be started an 'interval' from now,
324
247
# and every interval from then on.
325
self.checker_initiator_tag = (gobject.timeout_add
326
(self.interval_milliseconds(),
327
self.start_checker))
248
self.checker_initiator_tag = gobject.timeout_add\
249
(self._interval_milliseconds,
250
self.start_checker)
328
251
# Also start a new checker *right now*.
329
252
self.start_checker()
330
# Schedule a disable() when 'timeout' has passed
331
self.disable_initiator_tag = (gobject.timeout_add
332
(self.timeout_milliseconds(),
333
self.disable))
334
self.enabled = True
335
336
def disable(self):
337
"""Disable this client."""
338
if not getattr(self, "enabled", False):
253
# Schedule a stop() when 'timeout' has passed
254
self.stop_initiator_tag = gobject.timeout_add\
255
(self._timeout_milliseconds,
256
self.stop)
257
def stop(self):
258
"""Stop this client.
259
The possibility that a client might be restarted is left open,
260
but not currently used."""
261
# If this client doesn't have a secret, it is already stopped.
262
if self.secret:
263
logger.info(u"Stopping client %s", self.name)
264
self.secret = None
265
else:
339
266
return False
340
logger.info(u"Disabling client %s", self.name)
341
if getattr(self, u"disable_initiator_tag", False):
342
gobject.source_remove(self.disable_initiator_tag)
343
self.disable_initiator_tag = None
344
if getattr(self, u"checker_initiator_tag", False):
267
if getattr(self, "stop_initiator_tag", False):
268
gobject.source_remove(self.stop_initiator_tag)
269
self.stop_initiator_tag = None
270
if getattr(self, "checker_initiator_tag", False):
345
271
gobject.source_remove(self.checker_initiator_tag)
346
272
self.checker_initiator_tag = None
347
273
self.stop_checker()
348
if self.disable_hook:
349
self.disable_hook(self)
350
self.enabled = False
274
if self.stop_hook:
275
self.stop_hook(self)
351
276
# Do not run this again if called by a gobject.timeout_add
352
277
return False
353
354
278
def __del__(self):
355
self.disable_hook = None
356
self.disable()
357
358
def checker_callback(self, pid, condition, command):
279
self.stop_hook = None
280
self.stop()
281
def checker_callback(self, pid, condition):
359
282
"""The checker has completed, so take appropriate actions."""
283
now = datetime.datetime.now()
360
284
self.checker_callback_tag = None
361
285
self.checker = None
362
if os.WIFEXITED(condition):
363
exitstatus = os.WEXITSTATUS(condition)
364
if exitstatus == 0:
365
logger.info(u"Checker for %(name)s succeeded",
366
vars(self))
367
self.checked_ok()
368
else:
369
logger.info(u"Checker for %(name)s failed",
370
vars(self))
371
else:
286
if os.WIFEXITED(condition) \
287
and (os.WEXITSTATUS(condition) == 0):
288
logger.info(u"Checker for %(name)s succeeded",
289
vars(self))
290
self.last_checked_ok = now
291
gobject.source_remove(self.stop_initiator_tag)
292
self.stop_initiator_tag = gobject.timeout_add\
293
(self._timeout_milliseconds,
294
self.stop)
295
elif not os.WIFEXITED(condition):
372
296
logger.warning(u"Checker for %(name)s crashed?",
373
297
vars(self))
374
375
def checked_ok(self):
376
"""Bump up the timeout for this client.
377
378
This should only be called when the client has been seen,
379
alive and well.
380
"""
381
self.last_checked_ok = datetime.datetime.utcnow()
382
gobject.source_remove(self.disable_initiator_tag)
383
self.disable_initiator_tag = (gobject.timeout_add
384
(self.timeout_milliseconds(),
385
self.disable))
386
298
else:
299
logger.info(u"Checker for %(name)s failed",
300
vars(self))
387
301
def start_checker(self):
388
302
"""Start a new checker subprocess if one is not running.
389
390
303
If a checker already exists, leave it running and do
391
304
nothing."""
392
305
# The reason for not killing a running checker is that if we
397
310
# checkers alone, the checker would have to take more time
398
311
# than 'timeout' for the client to be declared invalid, which
399
312
# is as it should be.
400
401
# If a checker exists, make sure it is not a zombie
402
try:
403
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
404
except (AttributeError, OSError), error:
405
if (isinstance(error, OSError)
406
and error.errno != errno.ECHILD):
407
raise error
408
else:
409
if pid:
410
logger.warning(u"Checker was a zombie")
411
gobject.source_remove(self.checker_callback_tag)
412
self.checker_callback(pid, status,
413
self.current_checker_command)
414
# Start a new checker if needed
415
313
if self.checker is None:
416
314
try:
417
# In case checker_command has exactly one % operator
418
command = self.checker_command % self.host
315
# In case check_command has exactly one % operator
316
command = self.check_command % self.fqdn
419
317
except TypeError:
420
318
# Escape attributes for the shell
421
escaped_attrs = dict((key,
422
re.escape(unicode(str(val),
423
errors=
424
u'replace')))
319
escaped_attrs = dict((key, re.escape(str(val)))
425
320
for key, val in
426
321
vars(self).iteritems())
427
322
try:
428
command = self.checker_command % escaped_attrs
323
command = self.check_command % escaped_attrs
429
324
except TypeError, error:
430
325
logger.error(u'Could not format string "%s":'
431
u' %s', self.checker_command, error)
326
u' %s', self.check_command, error)
432
327
return True # Try again later
433
self.current_checker_command = command
434
328
try:
435
329
logger.info(u"Starting checker %r for %s",
436
330
command, self.name)
437
# We don't need to redirect stdout and stderr, since
438
# in normal mode, that is already done by daemon(),
439
# and in debug mode we don't want to. (Stdin is
440
# always replaced by /dev/null.)
441
331
self.checker = subprocess.Popen(command,
442
332
close_fds=True,
443
shell=True, cwd=u"/")
444
self.checker_callback_tag = (gobject.child_watch_add
445
(self.checker.pid,
446
self.checker_callback,
447
data=command))
448
# The checker may have completed before the gobject
449
# watch was added. Check for this.
450
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
451
if pid:
452
gobject.source_remove(self.checker_callback_tag)
453
self.checker_callback(pid, status, command)
454
except OSError, error:
333
shell=True, cwd="/")
334
self.checker_callback_tag = gobject.child_watch_add\
335
(self.checker.pid,
336
self.checker_callback)
337
except subprocess.OSError, error:
455
338
logger.error(u"Failed to start subprocess: %s",
456
339
error)
457
340
# Re-run this periodically if run by gobject.timeout_add
458
341
return True
459
460
342
def stop_checker(self):
461
343
"""Force the checker process, if any, to stop."""
462
344
if self.checker_callback_tag:
463
345
gobject.source_remove(self.checker_callback_tag)
464
346
self.checker_callback_tag = None
465
if getattr(self, u"checker", None) is None:
347
if getattr(self, "checker", None) is None:
466
348
return
467
logger.debug(u"Stopping checker for %(name)s", vars(self))
349
logger.debug("Stopping checker for %(name)s", vars(self))
468
350
try:
469
351
os.kill(self.checker.pid, signal.SIGTERM)
470
352
#os.sleep(0.5)
474
356
if error.errno != errno.ESRCH: # No such process
475
357
raise
476
358
self.checker = None
477
478
359
def still_valid(self):
479
360
"""Has the timeout not yet passed for this client?"""
480
if not getattr(self, u"enabled", False):
481
return False
482
now = datetime.datetime.utcnow()
361
now = datetime.datetime.now()
483
362
if self.last_checked_ok is None:
484
363
return now < (self.created + self.timeout)
485
364
else:
486
365
return now < (self.last_checked_ok + self.timeout)
487
366
488
367
489
def dbus_service_property(dbus_interface, signature=u"v",
490
access=u"readwrite", byte_arrays=False):
491
"""Decorators for marking methods of a DBusObjectWithProperties to
492
become properties on the D-Bus.
493
494
The decorated method will be called with no arguments by "Get"
495
and with one argument by "Set".
496
497
The parameters, where they are supported, are the same as
498
dbus.service.method, except there is only "signature", since the
499
type from Get() and the type sent to Set() is the same.
500
"""
501
def decorator(func):
502
func._dbus_is_property = True
503
func._dbus_interface = dbus_interface
504
func._dbus_signature = signature
505
func._dbus_access = access
506
func._dbus_name = func.__name__
507
if func._dbus_name.endswith(u"_dbus_property"):
508
func._dbus_name = func._dbus_name[:-14]
509
func._dbus_get_args_options = {u'byte_arrays': byte_arrays }
510
return func
511
return decorator
512
513
514
class DBusPropertyException(dbus.exceptions.DBusException):
515
"""A base class for D-Bus property-related exceptions
516
"""
517
def __unicode__(self):
518
return unicode(str(self))
519
520
521
class DBusPropertyAccessException(DBusPropertyException):
522
"""A property's access permissions disallows an operation.
523
"""
524
pass
525
526
527
class DBusPropertyNotFound(DBusPropertyException):
528
"""An attempt was made to access a non-existing property.
529
"""
530
pass
531
532
533
class DBusObjectWithProperties(dbus.service.Object):
534
"""A D-Bus object with properties.
535
536
Classes inheriting from this can use the dbus_service_property
537
decorator to expose methods as D-Bus properties. It exposes the
538
standard Get(), Set(), and GetAll() methods on the D-Bus.
539
"""
540
541
@staticmethod
542
def _is_dbus_property(obj):
543
return getattr(obj, u"_dbus_is_property", False)
544
545
def _get_all_dbus_properties(self):
546
"""Returns a generator of (name, attribute) pairs
547
"""
548
return ((prop._dbus_name, prop)
549
for name, prop in
550
inspect.getmembers(self, self._is_dbus_property))
551
552
def _get_dbus_property(self, interface_name, property_name):
553
"""Returns a bound method if one exists which is a D-Bus
554
property with the specified name and interface.
555
"""
556
for name in (property_name,
557
property_name + u"_dbus_property"):
558
prop = getattr(self, name, None)
559
if (prop is None
560
or not self._is_dbus_property(prop)
561
or prop._dbus_name != property_name
562
or (interface_name and prop._dbus_interface
563
and interface_name != prop._dbus_interface)):
564
continue
565
return prop
566
# No such property
567
raise DBusPropertyNotFound(self.dbus_object_path + u":"
568
+ interface_name + u"."
569
+ property_name)
570
571
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ss",
572
out_signature=u"v")
573
def Get(self, interface_name, property_name):
574
"""Standard D-Bus property Get() method, see D-Bus standard.
575
"""
576
prop = self._get_dbus_property(interface_name, property_name)
577
if prop._dbus_access == u"write":
578
raise DBusPropertyAccessException(property_name)
579
value = prop()
580
if not hasattr(value, u"variant_level"):
581
return value
582
return type(value)(value, variant_level=value.variant_level+1)
583
584
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ssv")
585
def Set(self, interface_name, property_name, value):
586
"""Standard D-Bus property Set() method, see D-Bus standard.
587
"""
588
prop = self._get_dbus_property(interface_name, property_name)
589
if prop._dbus_access == u"read":
590
raise DBusPropertyAccessException(property_name)
591
if prop._dbus_get_args_options[u"byte_arrays"]:
592
value = dbus.ByteArray(''.join(unichr(byte)
593
for byte in value))
594
prop(value)
595
596
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"s",
597
out_signature=u"a{sv}")
598
def GetAll(self, interface_name):
599
"""Standard D-Bus property GetAll() method, see D-Bus
600
standard.
601
602
Note: Will not include properties with access="write".
603
"""
604
all = {}
605
for name, prop in self._get_all_dbus_properties():
606
if (interface_name
607
and interface_name != prop._dbus_interface):
608
# Interface non-empty but did not match
609
continue
610
# Ignore write-only properties
611
if prop._dbus_access == u"write":
612
continue
613
value = prop()
614
if not hasattr(value, u"variant_level"):
615
all[name] = value
616
continue
617
all[name] = type(value)(value, variant_level=
618
value.variant_level+1)
619
return dbus.Dictionary(all, signature=u"sv")
620
621
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
622
out_signature=u"s",
623
path_keyword='object_path',
624
connection_keyword='connection')
625
def Introspect(self, object_path, connection):
626
"""Standard D-Bus method, overloaded to insert property tags.
627
"""
628
xmlstring = dbus.service.Object.Introspect(self, object_path,
629
connection)
630
document = xml.dom.minidom.parseString(xmlstring)
631
del xmlstring
632
def make_tag(document, name, prop):
633
e = document.createElement(u"property")
634
e.setAttribute(u"name", name)
635
e.setAttribute(u"type", prop._dbus_signature)
636
e.setAttribute(u"access", prop._dbus_access)
637
return e
638
for if_tag in document.getElementsByTagName(u"interface"):
639
for tag in (make_tag(document, name, prop)
640
for name, prop
641
in self._get_all_dbus_properties()
642
if prop._dbus_interface
643
== if_tag.getAttribute(u"name")):
644
if_tag.appendChild(tag)
645
# Add the names to the return values for the
646
# "org.freedesktop.DBus.Properties" methods
647
if (if_tag.getAttribute(u"name")
648
== u"org.freedesktop.DBus.Properties"):
649
for cn in if_tag.getElementsByTagName(u"method"):
650
if cn.getAttribute(u"name") == u"Get":
651
for arg in cn.getElementsByTagName(u"arg"):
652
if (arg.getAttribute(u"direction")
653
== u"out"):
654
arg.setAttribute(u"name", u"value")
655
elif cn.getAttribute(u"name") == u"GetAll":
656
for arg in cn.getElementsByTagName(u"arg"):
657
if (arg.getAttribute(u"direction")
658
== u"out"):
659
arg.setAttribute(u"name", u"props")
660
xmlstring = document.toxml(u"utf-8")
661
document.unlink()
662
return xmlstring
663
664
665
class ClientDBus(Client, DBusObjectWithProperties):
666
"""A Client class using D-Bus
667
668
Attributes:
669
dbus_object_path: dbus.ObjectPath
670
bus: dbus.SystemBus()
671
"""
672
# dbus.service.Object doesn't use super(), so we can't either.
673
674
def __init__(self, bus = None, *args, **kwargs):
675
self.bus = bus
676
Client.__init__(self, *args, **kwargs)
677
# Only now, when this client is initialized, can it show up on
678
# the D-Bus
679
self.dbus_object_path = (dbus.ObjectPath
680
(u"/clients/"
681
+ self.name.replace(u".", u"_")))
682
DBusObjectWithProperties.__init__(self, self.bus,
683
self.dbus_object_path)
684
685
@staticmethod
686
def _datetime_to_dbus(dt, variant_level=0):
687
"""Convert a UTC datetime.datetime() to a D-Bus type."""
688
return dbus.String(dt.isoformat(),
689
variant_level=variant_level)
690
691
def enable(self):
692
oldstate = getattr(self, u"enabled", False)
693
r = Client.enable(self)
694
if oldstate != self.enabled:
695
# Emit D-Bus signals
696
self.PropertyChanged(dbus.String(u"enabled"),
697
dbus.Boolean(True, variant_level=1))
698
self.PropertyChanged(
699
dbus.String(u"last_enabled"),
700
self._datetime_to_dbus(self.last_enabled,
701
variant_level=1))
702
return r
703
704
def disable(self, signal = True):
705
oldstate = getattr(self, u"enabled", False)
706
r = Client.disable(self)
707
if signal and oldstate != self.enabled:
708
# Emit D-Bus signal
709
self.PropertyChanged(dbus.String(u"enabled"),
710
dbus.Boolean(False, variant_level=1))
711
return r
712
713
def __del__(self, *args, **kwargs):
714
try:
715
self.remove_from_connection()
716
except LookupError:
717
pass
718
if hasattr(DBusObjectWithProperties, u"__del__"):
719
DBusObjectWithProperties.__del__(self, *args, **kwargs)
720
Client.__del__(self, *args, **kwargs)
721
722
def checker_callback(self, pid, condition, command,
723
*args, **kwargs):
724
self.checker_callback_tag = None
725
self.checker = None
726
# Emit D-Bus signal
727
self.PropertyChanged(dbus.String(u"checker_running"),
728
dbus.Boolean(False, variant_level=1))
729
if os.WIFEXITED(condition):
730
exitstatus = os.WEXITSTATUS(condition)
731
# Emit D-Bus signal
732
self.CheckerCompleted(dbus.Int16(exitstatus),
733
dbus.Int64(condition),
734
dbus.String(command))
735
else:
736
# Emit D-Bus signal
737
self.CheckerCompleted(dbus.Int16(-1),
738
dbus.Int64(condition),
739
dbus.String(command))
740
741
return Client.checker_callback(self, pid, condition, command,
742
*args, **kwargs)
743
744
def checked_ok(self, *args, **kwargs):
745
r = Client.checked_ok(self, *args, **kwargs)
746
# Emit D-Bus signal
747
self.PropertyChanged(
748
dbus.String(u"last_checked_ok"),
749
(self._datetime_to_dbus(self.last_checked_ok,
750
variant_level=1)))
751
return r
752
753
def start_checker(self, *args, **kwargs):
754
old_checker = self.checker
755
if self.checker is not None:
756
old_checker_pid = self.checker.pid
757
else:
758
old_checker_pid = None
759
r = Client.start_checker(self, *args, **kwargs)
760
# Only if new checker process was started
761
if (self.checker is not None
762
and old_checker_pid != self.checker.pid):
763
# Emit D-Bus signal
764
self.CheckerStarted(self.current_checker_command)
765
self.PropertyChanged(
766
dbus.String(u"checker_running"),
767
dbus.Boolean(True, variant_level=1))
768
return r
769
770
def stop_checker(self, *args, **kwargs):
771
old_checker = getattr(self, u"checker", None)
772
r = Client.stop_checker(self, *args, **kwargs)
773
if (old_checker is not None
774
and getattr(self, u"checker", None) is None):
775
self.PropertyChanged(dbus.String(u"checker_running"),
776
dbus.Boolean(False, variant_level=1))
777
return r
778
779
## D-Bus methods & signals
780
_interface = u"se.bsnet.fukt.Mandos.Client"
781
782
# CheckedOK - method
783
@dbus.service.method(_interface)
784
def CheckedOK(self):
785
return self.checked_ok()
786
787
# CheckerCompleted - signal
788
@dbus.service.signal(_interface, signature=u"nxs")
789
def CheckerCompleted(self, exitcode, waitstatus, command):
790
"D-Bus signal"
791
pass
792
793
# CheckerStarted - signal
794
@dbus.service.signal(_interface, signature=u"s")
795
def CheckerStarted(self, command):
796
"D-Bus signal"
797
pass
798
799
# PropertyChanged - signal
800
@dbus.service.signal(_interface, signature=u"sv")
801
def PropertyChanged(self, property, value):
802
"D-Bus signal"
803
pass
804
805
# ReceivedSecret - signal
806
@dbus.service.signal(_interface)
807
def ReceivedSecret(self):
808
"D-Bus signal"
809
pass
810
811
# Rejected - signal
812
@dbus.service.signal(_interface)
813
def Rejected(self):
814
"D-Bus signal"
815
pass
816
817
# Enable - method
818
@dbus.service.method(_interface)
819
def Enable(self):
820
"D-Bus method"
821
self.enable()
822
823
# StartChecker - method
824
@dbus.service.method(_interface)
825
def StartChecker(self):
826
"D-Bus method"
827
self.start_checker()
828
829
# Disable - method
830
@dbus.service.method(_interface)
831
def Disable(self):
832
"D-Bus method"
833
self.disable()
834
835
# StopChecker - method
836
@dbus.service.method(_interface)
837
def StopChecker(self):
838
self.stop_checker()
839
840
# name - property
841
@dbus_service_property(_interface, signature=u"s", access=u"read")
842
def name_dbus_property(self):
843
return dbus.String(self.name)
844
845
# fingerprint - property
846
@dbus_service_property(_interface, signature=u"s", access=u"read")
847
def fingerprint_dbus_property(self):
848
return dbus.String(self.fingerprint)
849
850
# host - property
851
@dbus_service_property(_interface, signature=u"s",
852
access=u"readwrite")
853
def host_dbus_property(self, value=None):
854
if value is None: # get
855
return dbus.String(self.host)
856
self.host = value
857
# Emit D-Bus signal
858
self.PropertyChanged(dbus.String(u"host"),
859
dbus.String(value, variant_level=1))
860
861
# created - property
862
@dbus_service_property(_interface, signature=u"s", access=u"read")
863
def created_dbus_property(self):
864
return dbus.String(self._datetime_to_dbus(self.created))
865
866
# last_enabled - property
867
@dbus_service_property(_interface, signature=u"s", access=u"read")
868
def last_enabled_dbus_property(self):
869
if self.last_enabled is None:
870
return dbus.String(u"")
871
return dbus.String(self._datetime_to_dbus(self.last_enabled))
872
873
# enabled - property
874
@dbus_service_property(_interface, signature=u"b",
875
access=u"readwrite")
876
def enabled_dbus_property(self, value=None):
877
if value is None: # get
878
return dbus.Boolean(self.enabled)
879
if value:
880
self.enable()
881
else:
882
self.disable()
883
884
# last_checked_ok - property
885
@dbus_service_property(_interface, signature=u"s",
886
access=u"readwrite")
887
def last_checked_ok_dbus_property(self, value=None):
888
if value is not None:
889
self.checked_ok()
890
return
891
if self.last_checked_ok is None:
892
return dbus.String(u"")
893
return dbus.String(self._datetime_to_dbus(self
894
.last_checked_ok))
895
896
# timeout - property
897
@dbus_service_property(_interface, signature=u"t",
898
access=u"readwrite")
899
def timeout_dbus_property(self, value=None):
900
if value is None: # get
901
return dbus.UInt64(self.timeout_milliseconds())
902
self.timeout = datetime.timedelta(0, 0, 0, value)
903
# Emit D-Bus signal
904
self.PropertyChanged(dbus.String(u"timeout"),
905
dbus.UInt64(value, variant_level=1))
906
if getattr(self, u"disable_initiator_tag", None) is None:
907
return
908
# Reschedule timeout
909
gobject.source_remove(self.disable_initiator_tag)
910
self.disable_initiator_tag = None
911
time_to_die = (self.
912
_timedelta_to_milliseconds((self
913
.last_checked_ok
914
+ self.timeout)
915
- datetime.datetime
916
.utcnow()))
917
if time_to_die <= 0:
918
# The timeout has passed
919
self.disable()
920
else:
921
self.disable_initiator_tag = (gobject.timeout_add
922
(time_to_die, self.disable))
923
924
# interval - property
925
@dbus_service_property(_interface, signature=u"t",
926
access=u"readwrite")
927
def interval_dbus_property(self, value=None):
928
if value is None: # get
929
return dbus.UInt64(self.interval_milliseconds())
930
self.interval = datetime.timedelta(0, 0, 0, value)
931
# Emit D-Bus signal
932
self.PropertyChanged(dbus.String(u"interval"),
933
dbus.UInt64(value, variant_level=1))
934
if getattr(self, u"checker_initiator_tag", None) is None:
935
return
936
# Reschedule checker run
937
gobject.source_remove(self.checker_initiator_tag)
938
self.checker_initiator_tag = (gobject.timeout_add
939
(value, self.start_checker))
940
self.start_checker() # Start one now, too
941
942
# checker - property
943
@dbus_service_property(_interface, signature=u"s",
944
access=u"readwrite")
945
def checker_dbus_property(self, value=None):
946
if value is None: # get
947
return dbus.String(self.checker_command)
948
self.checker_command = value
949
# Emit D-Bus signal
950
self.PropertyChanged(dbus.String(u"checker"),
951
dbus.String(self.checker_command,
952
variant_level=1))
953
954
# checker_running - property
955
@dbus_service_property(_interface, signature=u"b",
956
access=u"readwrite")
957
def checker_running_dbus_property(self, value=None):
958
if value is None: # get
959
return dbus.Boolean(self.checker is not None)
960
if value:
961
self.start_checker()
962
else:
963
self.stop_checker()
964
965
# object_path - property
966
@dbus_service_property(_interface, signature=u"o", access=u"read")
967
def object_path_dbus_property(self):
968
return self.dbus_object_path # is already a dbus.ObjectPath
969
970
# secret = property
971
@dbus_service_property(_interface, signature=u"ay",
972
access=u"write", byte_arrays=True)
973
def secret_dbus_property(self, value):
974
self.secret = str(value)
975
976
del _interface
977
978
979
class ClientHandler(socketserver.BaseRequestHandler, object):
980
"""A class to handle client connections.
981
982
Instantiated once for each connection to handle it.
368
def peer_certificate(session):
369
"Return the peer's OpenPGP certificate as a bytestring"
370
# If not an OpenPGP certificate...
371
if gnutls.library.functions.gnutls_certificate_type_get\
372
(session._c_object) \
373
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP:
374
# ...do the normal thing
375
return session.peer_certificate
376
list_size = ctypes.c_uint()
377
cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
378
(session._c_object, ctypes.byref(list_size))
379
if list_size.value == 0:
380
return None
381
cert = cert_list[0]
382
return ctypes.string_at(cert.data, cert.size)
383
384
385
def fingerprint(openpgp):
386
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
387
# New GnuTLS "datum" with the OpenPGP public key
388
datum = gnutls.library.types.gnutls_datum_t\
389
(ctypes.cast(ctypes.c_char_p(openpgp),
390
ctypes.POINTER(ctypes.c_ubyte)),
391
ctypes.c_uint(len(openpgp)))
392
# New empty GnuTLS certificate
393
crt = gnutls.library.types.gnutls_openpgp_crt_t()
394
gnutls.library.functions.gnutls_openpgp_crt_init\
395
(ctypes.byref(crt))
396
# Import the OpenPGP public key into the certificate
397
gnutls.library.functions.gnutls_openpgp_crt_import\
398
(crt, ctypes.byref(datum),
399
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
400
# New buffer for the fingerprint
401
buffer = ctypes.create_string_buffer(20)
402
buffer_length = ctypes.c_size_t()
403
# Get the fingerprint from the certificate into the buffer
404
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
405
(crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
406
# Deinit the certificate
407
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
408
# Convert the buffer to a Python bytestring
409
fpr = ctypes.string_at(buffer, buffer_length.value)
410
# Convert the bytestring to hexadecimal notation
411
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
412
return hex_fpr
413
414
415
class tcp_handler(SocketServer.BaseRequestHandler, object):
416
"""A TCP request handler class.
417
Instantiated by IPv6_TCPServer for each request to handle it.
983
418
Note: This will run in its own forked process."""
984
419
985
420
def handle(self):
986
421
logger.info(u"TCP connection from: %s",
987
unicode(self.client_address))
988
logger.debug(u"IPC Pipe FD: %d", self.server.pipe[1])
989
# Open IPC pipe to parent process
990
with closing(os.fdopen(self.server.pipe[1], u"w", 1)) as ipc:
991
session = (gnutls.connection
992
.ClientSession(self.request,
993
gnutls.connection
994
.X509Credentials()))
995
996
line = self.request.makefile().readline()
997
logger.debug(u"Protocol version: %r", line)
998
try:
999
if int(line.strip().split()[0]) > 1:
1000
raise RuntimeError
1001
except (ValueError, IndexError, RuntimeError), error:
1002
logger.error(u"Unknown protocol version: %s", error)
1003
return
1004
1005
# Note: gnutls.connection.X509Credentials is really a
1006
# generic GnuTLS certificate credentials object so long as
1007
# no X.509 keys are added to it. Therefore, we can use it
1008
# here despite using OpenPGP certificates.
1009
1010
#priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
1011
# u"+AES-256-CBC", u"+SHA1",
1012
# u"+COMP-NULL", u"+CTYPE-OPENPGP",
1013
# u"+DHE-DSS"))
1014
# Use a fallback default, since this MUST be set.
1015
priority = self.server.gnutls_priority
1016
if priority is None:
1017
priority = u"NORMAL"
1018
(gnutls.library.functions
1019
.gnutls_priority_set_direct(session._c_object,
1020
priority, None))
1021
1022
try:
1023
session.handshake()
1024
except gnutls.errors.GNUTLSError, error:
1025
logger.warning(u"Handshake failed: %s", error)
1026
# Do not run session.bye() here: the session is not
1027
# established. Just abandon the request.
1028
return
1029
logger.debug(u"Handshake succeeded")
1030
try:
1031
fpr = self.fingerprint(self.peer_certificate(session))
1032
except (TypeError, gnutls.errors.GNUTLSError), error:
1033
logger.warning(u"Bad certificate: %s", error)
1034
session.bye()
1035
return
1036
logger.debug(u"Fingerprint: %s", fpr)
1037
1038
for c in self.server.clients:
1039
if c.fingerprint == fpr:
1040
client = c
1041
break
1042
else:
1043
ipc.write(u"NOTFOUND %s %s\n"
1044
% (fpr, unicode(self.client_address)))
1045
session.bye()
1046
return
1047
# Have to check if client.still_valid(), since it is
1048
# possible that the client timed out while establishing
1049
# the GnuTLS session.
1050
if not client.still_valid():
1051
ipc.write(u"INVALID %s\n" % client.name)
1052
session.bye()
1053
return
1054
ipc.write(u"SENDING %s\n" % client.name)
1055
sent_size = 0
1056
while sent_size < len(client.secret):
1057
sent = session.send(client.secret[sent_size:])
1058
logger.debug(u"Sent: %d, remaining: %d",
1059
sent, len(client.secret)
1060
- (sent_size + sent))
1061
sent_size += sent
1062
session.bye()
1063
1064
@staticmethod
1065
def peer_certificate(session):
1066
"Return the peer's OpenPGP certificate as a bytestring"
1067
# If not an OpenPGP certificate...
1068
if (gnutls.library.functions
1069
.gnutls_certificate_type_get(session._c_object)
1070
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1071
# ...do the normal thing
1072
return session.peer_certificate
1073
list_size = ctypes.c_uint(1)
1074
cert_list = (gnutls.library.functions
1075
.gnutls_certificate_get_peers
1076
(session._c_object, ctypes.byref(list_size)))
1077
if not bool(cert_list) and list_size.value != 0:
1078
raise gnutls.errors.GNUTLSError(u"error getting peer"
1079
u" certificate")
1080
if list_size.value == 0:
1081
return None
1082
cert = cert_list[0]
1083
return ctypes.string_at(cert.data, cert.size)
1084
1085
@staticmethod
1086
def fingerprint(openpgp):
1087
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1088
# New GnuTLS "datum" with the OpenPGP public key
1089
datum = (gnutls.library.types
1090
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1091
ctypes.POINTER
1092
(ctypes.c_ubyte)),
1093
ctypes.c_uint(len(openpgp))))
1094
# New empty GnuTLS certificate
1095
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1096
(gnutls.library.functions
1097
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1098
# Import the OpenPGP public key into the certificate
1099
(gnutls.library.functions
1100
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1101
gnutls.library.constants
1102
.GNUTLS_OPENPGP_FMT_RAW))
1103
# Verify the self signature in the key
1104
crtverify = ctypes.c_uint()
1105
(gnutls.library.functions
1106
.gnutls_openpgp_crt_verify_self(crt, 0,
1107
ctypes.byref(crtverify)))
1108
if crtverify.value != 0:
1109
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1110
raise (gnutls.errors.CertificateSecurityError
1111
(u"Verify failed"))
1112
# New buffer for the fingerprint
1113
buf = ctypes.create_string_buffer(20)
1114
buf_len = ctypes.c_size_t()
1115
# Get the fingerprint from the certificate into the buffer
1116
(gnutls.library.functions
1117
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1118
ctypes.byref(buf_len)))
1119
# Deinit the certificate
1120
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1121
# Convert the buffer to a Python bytestring
1122
fpr = ctypes.string_at(buf, buf_len.value)
1123
# Convert the bytestring to hexadecimal notation
1124
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
1125
return hex_fpr
1126
1127
1128
class ForkingMixInWithPipe(socketserver.ForkingMixIn, object):
1129
"""Like socketserver.ForkingMixIn, but also pass a pipe."""
1130
def process_request(self, request, client_address):
1131
"""Overrides and wraps the original process_request().
1132
1133
This function creates a new pipe in self.pipe
1134
"""
1135
self.pipe = os.pipe()
1136
super(ForkingMixInWithPipe,
1137
self).process_request(request, client_address)
1138
os.close(self.pipe[1]) # close write end
1139
self.add_pipe(self.pipe[0])
1140
def add_pipe(self, pipe):
1141
"""Dummy function; override as necessary"""
1142
os.close(pipe)
1143
1144
1145
class IPv6_TCPServer(ForkingMixInWithPipe,
1146
socketserver.TCPServer, object):
1147
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1148
422
unicode(self.client_address))
423
session = gnutls.connection.ClientSession\
424
(self.request, gnutls.connection.X509Credentials())
425
426
line = self.request.makefile().readline()
427
logger.debug(u"Protocol version: %r", line)
428
try:
429
if int(line.strip().split()[0]) > 1:
430
raise RuntimeError
431
except (ValueError, IndexError, RuntimeError), error:
432
logger.error(u"Unknown protocol version: %s", error)
433
return
434
435
# Note: gnutls.connection.X509Credentials is really a generic
436
# GnuTLS certificate credentials object so long as no X.509
437
# keys are added to it. Therefore, we can use it here despite
438
# using OpenPGP certificates.
439
440
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
441
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
442
# "+DHE-DSS"))
443
priority = "NORMAL" # Fallback default, since this
444
# MUST be set.
445
if self.server.settings["priority"]:
446
priority = self.server.settings["priority"]
447
gnutls.library.functions.gnutls_priority_set_direct\
448
(session._c_object, priority, None);
449
450
try:
451
session.handshake()
452
except gnutls.errors.GNUTLSError, error:
453
logger.warning(u"Handshake failed: %s", error)
454
# Do not run session.bye() here: the session is not
455
# established. Just abandon the request.
456
return
457
try:
458
fpr = fingerprint(peer_certificate(session))
459
except (TypeError, gnutls.errors.GNUTLSError), error:
460
logger.warning(u"Bad certificate: %s", error)
461
session.bye()
462
return
463
logger.debug(u"Fingerprint: %s", fpr)
464
client = None
465
for c in self.server.clients:
466
if c.fingerprint == fpr:
467
client = c
468
break
469
if not client:
470
logger.warning(u"Client not found for fingerprint: %s",
471
fpr)
472
session.bye()
473
return
474
# Have to check if client.still_valid(), since it is possible
475
# that the client timed out while establishing the GnuTLS
476
# session.
477
if not client.still_valid():
478
logger.warning(u"Client %(name)s is invalid",
479
vars(client))
480
session.bye()
481
return
482
sent_size = 0
483
while sent_size < len(client.secret):
484
sent = session.send(client.secret[sent_size:])
485
logger.debug(u"Sent: %d, remaining: %d",
486
sent, len(client.secret)
487
- (sent_size + sent))
488
sent_size += sent
489
session.bye()
490
491
492
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
493
"""IPv6 TCP server. Accepts 'None' as address and/or port.
1149
494
Attributes:
1150
enabled: Boolean; whether this server is activated yet
1151
interface: None or a network interface name (string)
1152
use_ipv6: Boolean; to use IPv6 or not
495
settings: Server settings
496
clients: Set() of Client objects
1153
497
"""
1154
def __init__(self, server_address, RequestHandlerClass,
1155
interface=None, use_ipv6=True):
1156
self.interface = interface
1157
if use_ipv6:
1158
self.address_family = socket.AF_INET6
1159
socketserver.TCPServer.__init__(self, server_address,
1160
RequestHandlerClass)
498
address_family = socket.AF_INET6
499
def __init__(self, *args, **kwargs):
500
if "settings" in kwargs:
501
self.settings = kwargs["settings"]
502
del kwargs["settings"]
503
if "clients" in kwargs:
504
self.clients = kwargs["clients"]
505
del kwargs["clients"]
506
return super(type(self), self).__init__(*args, **kwargs)
1161
507
def server_bind(self):
1162
508
"""This overrides the normal server_bind() function
1163
509
to bind to an interface if one was specified, and also NOT to
1164
510
bind to an address or port if they were not specified."""
1165
if self.interface is not None:
1166
if SO_BINDTODEVICE is None:
1167
logger.error(u"SO_BINDTODEVICE does not exist;"
1168
u" cannot bind to interface %s",
1169
self.interface)
1170
else:
1171
try:
1172
self.socket.setsockopt(socket.SOL_SOCKET,
1173
SO_BINDTODEVICE,
1174
str(self.interface
1175
+ u'\0'))
1176
except socket.error, error:
1177
if error[0] == errno.EPERM:
1178
logger.error(u"No permission to"
1179
u" bind to interface %s",
1180
self.interface)
1181
elif error[0] == errno.ENOPROTOOPT:
1182
logger.error(u"SO_BINDTODEVICE not available;"
1183
u" cannot bind to interface %s",
1184
self.interface)
1185
else:
1186
raise
511
if self.settings["interface"]:
512
# 25 is from /usr/include/asm-i486/socket.h
513
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
514
try:
515
self.socket.setsockopt(socket.SOL_SOCKET,
516
SO_BINDTODEVICE,
517
self.settings["interface"])
518
except socket.error, error:
519
if error[0] == errno.EPERM:
520
logger.error(u"No permission to"
521
u" bind to interface %s",
522
self.settings["interface"])
523
else:
524
raise error
1187
525
# Only bind(2) the socket if we really need to.
1188
526
if self.server_address[0] or self.server_address[1]:
1189
527
if not self.server_address[0]:
1190
if self.address_family == socket.AF_INET6:
1191
any_address = u"::" # in6addr_any
1192
else:
1193
any_address = socket.INADDR_ANY
1194
self.server_address = (any_address,
528
in6addr_any = "::"
529
self.server_address = (in6addr_any,
1195
530
self.server_address[1])
1196
elif not self.server_address[1]:
531
elif self.server_address[1] is None:
1197
532
self.server_address = (self.server_address[0],
1198
533
0)
1199
# if self.interface:
1200
# self.server_address = (self.server_address[0],
1201
# 0, # port
1202
# 0, # flowinfo
1203
# if_nametoindex
1204
# (self.interface))
1205
return socketserver.TCPServer.server_bind(self)
1206
1207
1208
class MandosServer(IPv6_TCPServer):
1209
"""Mandos server.
1210
1211
Attributes:
1212
clients: set of Client objects
1213
gnutls_priority GnuTLS priority string
1214
use_dbus: Boolean; to emit D-Bus signals or not
1215
1216
Assumes a gobject.MainLoop event loop.
1217
"""
1218
def __init__(self, server_address, RequestHandlerClass,
1219
interface=None, use_ipv6=True, clients=None,
1220
gnutls_priority=None, use_dbus=True):
1221
self.enabled = False
1222
self.clients = clients
1223
if self.clients is None:
1224
self.clients = set()
1225
self.use_dbus = use_dbus
1226
self.gnutls_priority = gnutls_priority
1227
IPv6_TCPServer.__init__(self, server_address,
1228
RequestHandlerClass,
1229
interface = interface,
1230
use_ipv6 = use_ipv6)
1231
def server_activate(self):
1232
if self.enabled:
1233
return socketserver.TCPServer.server_activate(self)
1234
def enable(self):
1235
self.enabled = True
1236
def add_pipe(self, pipe):
1237
# Call "handle_ipc" for both data and EOF events
1238
gobject.io_add_watch(pipe, gobject.IO_IN | gobject.IO_HUP,
1239
self.handle_ipc)
1240
def handle_ipc(self, source, condition, file_objects={}):
1241
condition_names = {
1242
gobject.IO_IN: u"IN", # There is data to read.
1243
gobject.IO_OUT: u"OUT", # Data can be written (without
1244
# blocking).
1245
gobject.IO_PRI: u"PRI", # There is urgent data to read.
1246
gobject.IO_ERR: u"ERR", # Error condition.
1247
gobject.IO_HUP: u"HUP" # Hung up (the connection has been
1248
# broken, usually for pipes and
1249
# sockets).
1250
}
1251
conditions_string = ' | '.join(name
1252
for cond, name in
1253
condition_names.iteritems()
1254
if cond & condition)
1255
logger.debug(u"Handling IPC: FD = %d, condition = %s", source,
1256
conditions_string)
1257
1258
# Turn the pipe file descriptor into a Python file object
1259
if source not in file_objects:
1260
file_objects[source] = os.fdopen(source, u"r", 1)
1261
1262
# Read a line from the file object
1263
cmdline = file_objects[source].readline()
1264
if not cmdline: # Empty line means end of file
1265
# close the IPC pipe
1266
file_objects[source].close()
1267
del file_objects[source]
1268
1269
# Stop calling this function
1270
return False
1271
1272
logger.debug(u"IPC command: %r", cmdline)
1273
1274
# Parse and act on command
1275
cmd, args = cmdline.rstrip(u"\r\n").split(None, 1)
1276
1277
if cmd == u"NOTFOUND":
1278
logger.warning(u"Client not found for fingerprint: %s",
1279
args)
1280
if self.use_dbus:
1281
# Emit D-Bus signal
1282
mandos_dbus_service.ClientNotFound(args)
1283
elif cmd == u"INVALID":
1284
for client in self.clients:
1285
if client.name == args:
1286
logger.warning(u"Client %s is invalid", args)
1287
if self.use_dbus:
1288
# Emit D-Bus signal
1289
client.Rejected()
1290
break
1291
else:
1292
logger.error(u"Unknown client %s is invalid", args)
1293
elif cmd == u"SENDING":
1294
for client in self.clients:
1295
if client.name == args:
1296
logger.info(u"Sending secret to %s", client.name)
1297
client.checked_ok()
1298
if self.use_dbus:
1299
# Emit D-Bus signal
1300
client.ReceivedSecret()
1301
break
1302
else:
1303
logger.error(u"Sending secret to unknown client %s",
1304
args)
1305
else:
1306
logger.error(u"Unknown IPC command: %r", cmdline)
1307
1308
# Keep calling this function
1309
return True
534
return super(type(self), self).server_bind()
1310
535
1311
536
1312
537
def string_to_delta(interval):
1313
538
"""Parse a string and return a datetime.timedelta
1314
1315
>>> string_to_delta(u'7d')
539
540
>>> string_to_delta('7d')
1316
541
datetime.timedelta(7)
1317
>>> string_to_delta(u'60s')
542
>>> string_to_delta('60s')
1318
543
datetime.timedelta(0, 60)
1319
>>> string_to_delta(u'60m')
544
>>> string_to_delta('60m')
1320
545
datetime.timedelta(0, 3600)
1321
>>> string_to_delta(u'24h')
546
>>> string_to_delta('24h')
1322
547
datetime.timedelta(1)
1323
548
>>> string_to_delta(u'1w')
1324
549
datetime.timedelta(7)
1325
>>> string_to_delta(u'5m 30s')
1326
datetime.timedelta(0, 330)
1327
550
"""
1328
timevalue = datetime.timedelta(0)
1329
for s in interval.split():
1330
try:
1331
suffix = unicode(s[-1])
1332
value = int(s[:-1])
1333
if suffix == u"d":
1334
delta = datetime.timedelta(value)
1335
elif suffix == u"s":
1336
delta = datetime.timedelta(0, value)
1337
elif suffix == u"m":
1338
delta = datetime.timedelta(0, 0, 0, 0, value)
1339
elif suffix == u"h":
1340
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
1341
elif suffix == u"w":
1342
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1343
else:
1344
raise ValueError
1345
except (ValueError, IndexError):
551
try:
552
suffix=unicode(interval[-1])
553
value=int(interval[:-1])
554
if suffix == u"d":
555
delta = datetime.timedelta(value)
556
elif suffix == u"s":
557
delta = datetime.timedelta(0, value)
558
elif suffix == u"m":
559
delta = datetime.timedelta(0, 0, 0, 0, value)
560
elif suffix == u"h":
561
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
562
elif suffix == u"w":
563
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
564
else:
1346
565
raise ValueError
1347
timevalue += delta
1348
return timevalue
1349
566
except (ValueError, IndexError):
567
raise ValueError
568
return delta
569
570
571
def server_state_changed(state):
572
"""Derived from the Avahi example code"""
573
if state == avahi.SERVER_COLLISION:
574
logger.error(u"Server name collision")
575
service.remove()
576
elif state == avahi.SERVER_RUNNING:
577
service.add()
578
579
580
def entry_group_state_changed(state, error):
581
"""Derived from the Avahi example code"""
582
logger.debug(u"state change: %i", state)
583
584
if state == avahi.ENTRY_GROUP_ESTABLISHED:
585
logger.debug(u"Service established.")
586
elif state == avahi.ENTRY_GROUP_COLLISION:
587
logger.warning(u"Service name collision.")
588
service.rename()
589
elif state == avahi.ENTRY_GROUP_FAILURE:
590
logger.critical(u"Error in group state changed %s",
591
unicode(error))
592
raise AvahiGroupError("State changed: %s", str(error))
1350
593
1351
594
def if_nametoindex(interface):
1352
"""Call the C function if_nametoindex(), or equivalent
1353
1354
Note: This function cannot accept a unicode string."""
595
"""Call the C function if_nametoindex(), or equivalent"""
1355
596
global if_nametoindex
1356
597
try:
1357
if_nametoindex = (ctypes.cdll.LoadLibrary
1358
(ctypes.util.find_library(u"c"))
1359
.if_nametoindex)
598
if "ctypes.util" not in sys.modules:
599
import ctypes.util
600
if_nametoindex = ctypes.cdll.LoadLibrary\
601
(ctypes.util.find_library("c")).if_nametoindex
1360
602
except (OSError, AttributeError):
1361
logger.warning(u"Doing if_nametoindex the hard way")
603
if "struct" not in sys.modules:
604
import struct
605
if "fcntl" not in sys.modules:
606
import fcntl
1362
607
def if_nametoindex(interface):
1363
608
"Get an interface index the hard way, i.e. using fcntl()"
1364
609
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1365
with closing(socket.socket()) as s:
1366
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1367
struct.pack(str(u"16s16x"),
1368
interface))
1369
interface_index = struct.unpack(str(u"I"),
1370
ifreq[16:20])[0]
610
s = socket.socket()
611
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
612
struct.pack("16s16x", interface))
613
s.close()
614
interface_index = struct.unpack("I", ifreq[16:20])[0]
1371
615
return interface_index
1372
616
return if_nametoindex(interface)
1373
617
1374
618
1375
619
def daemon(nochdir = False, noclose = False):
1376
620
"""See daemon(3). Standard BSD Unix function.
1377
1378
621
This should really exist as os.daemon, but it doesn't (yet)."""
1379
622
if os.fork():
1380
623
sys.exit()
1381
624
os.setsid()
1382
625
if not nochdir:
1383
os.chdir(u"/")
626
os.chdir("/")
1384
627
if os.fork():
1385
628
sys.exit()
1386
629
if not noclose:
1388
631
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1389
632
if not stat.S_ISCHR(os.fstat(null).st_mode):
1390
633
raise OSError(errno.ENODEV,
1391
u"/dev/null not a character device")
634
"/dev/null not a character device")
1392
635
os.dup2(null, sys.stdin.fileno())
1393
636
os.dup2(null, sys.stdout.fileno())
1394
637
os.dup2(null, sys.stderr.fileno())
1397
640
1398
641
1399
642
def main():
1400
1401
##################################################################
1402
# Parsing of options, both command line and config file
1403
1404
parser = optparse.OptionParser(version = "%%prog %s" % version)
1405
parser.add_option("-i", u"--interface", type=u"string",
1406
metavar="IF", help=u"Bind to interface IF")
1407
parser.add_option("-a", u"--address", type=u"string",
1408
help=u"Address to listen for requests on")
1409
parser.add_option("-p", u"--port", type=u"int",
1410
help=u"Port number to receive requests on")
1411
parser.add_option("--check", action=u"store_true",
1412
help=u"Run self-test")
1413
parser.add_option("--debug", action=u"store_true",
1414
help=u"Debug mode; run in foreground and log to"
1415
u" terminal")
1416
parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1417
u" priority string (see GnuTLS documentation)")
1418
parser.add_option("--servicename", type=u"string",
1419
metavar=u"NAME", help=u"Zeroconf service name")
1420
parser.add_option("--configdir", type=u"string",
1421
default=u"/etc/mandos", metavar=u"DIR",
1422
help=u"Directory to search for configuration"
1423
u" files")
1424
parser.add_option("--no-dbus", action=u"store_false",
1425
dest=u"use_dbus", help=u"Do not provide D-Bus"
1426
u" system bus interface")
1427
parser.add_option("--no-ipv6", action=u"store_false",
1428
dest=u"use_ipv6", help=u"Do not use IPv6")
1429
options = parser.parse_args()[0]
643
global main_loop_started
644
main_loop_started = False
645
646
parser = OptionParser()
647
parser.add_option("-i", "--interface", type="string",
648
metavar="IF", help="Bind to interface IF")
649
parser.add_option("-a", "--address", type="string",
650
help="Address to listen for requests on")
651
parser.add_option("-p", "--port", type="int",
652
help="Port number to receive requests on")
653
parser.add_option("--check", action="store_true", default=False,
654
help="Run self-test")
655
parser.add_option("--debug", action="store_true", default=False,
656
help="Debug mode; run in foreground and log to"
657
" terminal")
658
parser.add_option("--priority", type="string", help="GnuTLS"
659
" priority string (see GnuTLS documentation)")
660
parser.add_option("--servicename", type="string", metavar="NAME",
661
help="Zeroconf service name")
662
parser.add_option("--configdir", type="string",
663
default="/etc/mandos", metavar="DIR",
664
help="Directory to search for configuration"
665
" files")
666
(options, args) = parser.parse_args()
1430
667
1431
668
if options.check:
1432
669
import doctest
1434
671
sys.exit()
1435
672
1436
673
# Default values for config file for server-global settings
1437
server_defaults = { u"interface": u"",
1438
u"address": u"",
1439
u"port": u"",
1440
u"debug": u"False",
1441
u"priority":
1442
u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1443
u"servicename": u"Mandos",
1444
u"use_dbus": u"True",
1445
u"use_ipv6": u"True",
674
server_defaults = { "interface": "",
675
"address": "",
676
"port": "",
677
"debug": "False",
678
"priority":
679
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
680
"servicename": "Mandos",
1446
681
}
1447
682
1448
683
# Parse config file for server-global settings
1449
server_config = configparser.SafeConfigParser(server_defaults)
684
server_config = ConfigParser.SafeConfigParser(server_defaults)
1450
685
del server_defaults
1451
server_config.read(os.path.join(options.configdir,
1452
u"mandos.conf"))
686
server_config.read(os.path.join(options.configdir, "mandos.conf"))
687
server_section = "server"
1453
688
# Convert the SafeConfigParser object to a dict
1454
server_settings = server_config.defaults()
1455
# Use the appropriate methods on the non-string config options
1456
for option in (u"debug", u"use_dbus", u"use_ipv6"):
1457
server_settings[option] = server_config.getboolean(u"DEFAULT",
1458
option)
1459
if server_settings["port"]:
1460
server_settings["port"] = server_config.getint(u"DEFAULT",
1461
u"port")
689
server_settings = dict(server_config.items(server_section))
690
# Use getboolean on the boolean config option
691
server_settings["debug"] = server_config.getboolean\
692
(server_section, "debug")
1462
693
del server_config
1463
694
1464
695
# Override the settings from the config file with command line
1465
696
# options, if set.
1466
for option in (u"interface", u"address", u"port", u"debug",
1467
u"priority", u"servicename", u"configdir",
1468
u"use_dbus", u"use_ipv6"):
697
for option in ("interface", "address", "port", "debug",
698
"priority", "servicename", "configdir"):
1469
699
value = getattr(options, option)
1470
700
if value is not None:
1471
701
server_settings[option] = value
1472
702
del options
1473
# Force all strings to be unicode
1474
for option in server_settings.keys():
1475
if type(server_settings[option]) is str:
1476
server_settings[option] = unicode(server_settings[option])
1477
703
# Now we have our good server settings in "server_settings"
1478
704
1479
##################################################################
1480
1481
# For convenience
1482
debug = server_settings[u"debug"]
1483
use_dbus = server_settings[u"use_dbus"]
1484
use_ipv6 = server_settings[u"use_ipv6"]
1485
1486
if not debug:
1487
syslogger.setLevel(logging.WARNING)
1488
console.setLevel(logging.WARNING)
1489
1490
if server_settings[u"servicename"] != u"Mandos":
1491
syslogger.setFormatter(logging.Formatter
1492
(u'Mandos (%s) [%%(process)d]:'
1493
u' %%(levelname)s: %%(message)s'
1494
% server_settings[u"servicename"]))
1495
1496
705
# Parse config file with clients
1497
client_defaults = { u"timeout": u"1h",
1498
u"interval": u"5m",
1499
u"checker": u"fping -q -- %%(host)s",
1500
u"host": u"",
706
client_defaults = { "timeout": "1h",
707
"interval": "5m",
708
"checker": "fping -q -- %%(fqdn)s",
1501
709
}
1502
client_config = configparser.SafeConfigParser(client_defaults)
1503
client_config.read(os.path.join(server_settings[u"configdir"],
1504
u"clients.conf"))
1505
1506
global mandos_dbus_service
1507
mandos_dbus_service = None
1508
1509
tcp_server = MandosServer((server_settings[u"address"],
1510
server_settings[u"port"]),
1511
ClientHandler,
1512
interface=server_settings[u"interface"],
1513
use_ipv6=use_ipv6,
1514
gnutls_priority=
1515
server_settings[u"priority"],
1516
use_dbus=use_dbus)
1517
pidfilename = u"/var/run/mandos.pid"
1518
try:
1519
pidfile = open(pidfilename, u"w")
1520
except IOError:
1521
logger.error(u"Could not open file %r", pidfilename)
1522
1523
try:
1524
uid = pwd.getpwnam(u"_mandos").pw_uid
1525
gid = pwd.getpwnam(u"_mandos").pw_gid
1526
except KeyError:
1527
try:
1528
uid = pwd.getpwnam(u"mandos").pw_uid
1529
gid = pwd.getpwnam(u"mandos").pw_gid
1530
except KeyError:
1531
try:
1532
uid = pwd.getpwnam(u"nobody").pw_uid
1533
gid = pwd.getpwnam(u"nobody").pw_gid
1534
except KeyError:
1535
uid = 65534
1536
gid = 65534
1537
try:
1538
os.setgid(gid)
1539
os.setuid(uid)
1540
except OSError, error:
1541
if error[0] != errno.EPERM:
1542
raise error
1543
1544
# Enable all possible GnuTLS debugging
1545
if debug:
1546
# "Use a log level over 10 to enable all debugging options."
1547
# - GnuTLS manual
1548
gnutls.library.functions.gnutls_global_set_log_level(11)
1549
1550
@gnutls.library.types.gnutls_log_func
1551
def debug_gnutls(level, string):
1552
logger.debug(u"GnuTLS: %s", string[:-1])
1553
1554
(gnutls.library.functions
1555
.gnutls_global_set_log_function(debug_gnutls))
710
client_config = ConfigParser.SafeConfigParser(client_defaults)
711
client_config.read(os.path.join(server_settings["configdir"],
712
"clients.conf"))
713
714
global service
715
service = AvahiService(name = server_settings["servicename"],
716
type = "_mandos._tcp", );
717
if server_settings["interface"]:
718
service.interface = if_nametoindex(server_settings["interface"])
1556
719
1557
720
global main_loop
721
global bus
722
global server
1558
723
# From the Avahi example code
1559
724
DBusGMainLoop(set_as_default=True )
1560
725
main_loop = gobject.MainLoop()
1561
726
bus = dbus.SystemBus()
727
server = dbus.Interface(
728
bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
729
avahi.DBUS_INTERFACE_SERVER )
1562
730
# End of Avahi example code
1563
if use_dbus:
1564
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
1565
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1566
service = AvahiService(name = server_settings[u"servicename"],
1567
servicetype = u"_mandos._tcp",
1568
protocol = protocol, bus = bus)
1569
if server_settings["interface"]:
1570
service.interface = (if_nametoindex
1571
(str(server_settings[u"interface"])))
1572
731
1573
client_class = Client
1574
if use_dbus:
1575
client_class = functools.partial(ClientDBus, bus = bus)
1576
tcp_server.clients.update(set(
1577
client_class(name = section,
1578
config= dict(client_config.items(section)))
1579
for section in client_config.sections()))
1580
if not tcp_server.clients:
1581
logger.warning(u"No clients defined")
732
debug = server_settings["debug"]
1582
733
1583
734
if debug:
1584
# Redirect stdin so all checkers get /dev/null
1585
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1586
os.dup2(null, sys.stdin.fileno())
1587
if null > 2:
1588
os.close(null)
1589
else:
1590
# No console logging
1591
logger.removeHandler(console)
1592
# Close all input and output, do double fork, etc.
735
console = logging.StreamHandler()
736
# console.setLevel(logging.DEBUG)
737
console.setFormatter(logging.Formatter\
738
('%(levelname)s: %(message)s'))
739
logger.addHandler(console)
740
del console
741
742
clients = Set()
743
def remove_from_clients(client):
744
clients.remove(client)
745
if not clients:
746
logger.critical(u"No clients left, exiting")
747
sys.exit()
748
749
clients.update(Set(Client(name = section,
750
stop_hook = remove_from_clients,
751
config
752
= dict(client_config.items(section)))
753
for section in client_config.sections()))
754
755
if not debug:
1593
756
daemon()
1594
757
1595
try:
1596
with closing(pidfile):
1597
pid = os.getpid()
1598
pidfile.write(str(pid) + "\n")
1599
del pidfile
1600
except IOError:
1601
logger.error(u"Could not write to file %r with PID %d",
1602
pidfilename, pid)
1603
except NameError:
1604
# "pidfile" was never created
1605
pass
1606
del pidfilename
1607
1608
758
def cleanup():
1609
759
"Cleanup function; run on exit"
1610
service.cleanup()
760
global group
761
# From the Avahi example code
762
if not group is None:
763
group.Free()
764
group = None
765
# End of Avahi example code
1611
766
1612
while tcp_server.clients:
1613
client = tcp_server.clients.pop()
1614
client.disable_hook = None
1615
client.disable()
767
while clients:
768
client = clients.pop()
769
client.stop_hook = None
770
client.stop()
1616
771
1617
772
atexit.register(cleanup)
1618
773
1621
776
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1622
777
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1623
778
1624
if use_dbus:
1625
class MandosDBusService(dbus.service.Object):
1626
"""A D-Bus proxy object"""
1627
def __init__(self):
1628
dbus.service.Object.__init__(self, bus, u"/")
1629
_interface = u"se.bsnet.fukt.Mandos"
1630
1631
@dbus.service.signal(_interface, signature=u"oa{sv}")
1632
def ClientAdded(self, objpath, properties):
1633
"D-Bus signal"
1634
pass
1635
1636
@dbus.service.signal(_interface, signature=u"s")
1637
def ClientNotFound(self, fingerprint):
1638
"D-Bus signal"
1639
pass
1640
1641
@dbus.service.signal(_interface, signature=u"os")
1642
def ClientRemoved(self, objpath, name):
1643
"D-Bus signal"
1644
pass
1645
1646
@dbus.service.method(_interface, out_signature=u"ao")
1647
def GetAllClients(self):
1648
"D-Bus method"
1649
return dbus.Array(c.dbus_object_path
1650
for c in tcp_server.clients)
1651
1652
@dbus.service.method(_interface,
1653
out_signature=u"a{oa{sv}}")
1654
def GetAllClientsWithProperties(self):
1655
"D-Bus method"
1656
return dbus.Dictionary(
1657
((c.dbus_object_path, c.GetAll(u""))
1658
for c in tcp_server.clients),
1659
signature=u"oa{sv}")
1660
1661
@dbus.service.method(_interface, in_signature=u"o")
1662
def RemoveClient(self, object_path):
1663
"D-Bus method"
1664
for c in tcp_server.clients:
1665
if c.dbus_object_path == object_path:
1666
tcp_server.clients.remove(c)
1667
c.remove_from_connection()
1668
# Don't signal anything except ClientRemoved
1669
c.disable(signal=False)
1670
# Emit D-Bus signal
1671
self.ClientRemoved(object_path, c.name)
1672
return
1673
raise KeyError
1674
1675
del _interface
1676
1677
mandos_dbus_service = MandosDBusService()
1678
1679
for client in tcp_server.clients:
1680
if use_dbus:
1681
# Emit D-Bus signal
1682
mandos_dbus_service.ClientAdded(client.dbus_object_path,
1683
client.GetAll(u""))
1684
client.enable()
1685
1686
tcp_server.enable()
1687
tcp_server.server_activate()
1688
779
for client in clients:
780
client.start()
781
782
tcp_server = IPv6_TCPServer((server_settings["address"],
783
server_settings["port"]),
784
tcp_handler,
785
settings=server_settings,
786
clients=clients)
1689
787
# Find out what port we got
1690
788
service.port = tcp_server.socket.getsockname()[1]
1691
if use_ipv6:
1692
logger.info(u"Now listening on address %r, port %d,"
1693
" flowinfo %d, scope_id %d"
1694
% tcp_server.socket.getsockname())
1695
else: # IPv4
1696
logger.info(u"Now listening on address %r, port %d"
1697
% tcp_server.socket.getsockname())
789
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
790
u" scope_id %d" % tcp_server.socket.getsockname())
1698
791
1699
792
#service.interface = tcp_server.socket.getsockname()[3]
1700
793
1701
794
try:
1702
795
# From the Avahi example code
796
server.connect_to_signal("StateChanged", server_state_changed)
1703
797
try:
1704
service.activate()
798
server_state_changed(server.GetState())
1705
799
except dbus.exceptions.DBusException, error:
1706
800
logger.critical(u"DBusException: %s", error)
1707
801
sys.exit(1)
1709
803
1710
804
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
1711
805
lambda *args, **kwargs:
1712
(tcp_server.handle_request
1713
(*args[2:], **kwargs) or True))
806
tcp_server.handle_request\
807
(*args[2:], **kwargs) or True)
1714
808
1715
logger.debug(u"Starting main loop")
809
logger.debug("Starting main loop")
810
main_loop_started = True
1716
811
main_loop.run()
1717
812
except AvahiError, error:
1718
logger.critical(u"AvahiError: %s", error)
813
logger.critical(u"AvahiError: %s" + unicode(error))
1719
814
sys.exit(1)
1720
815
except KeyboardInterrupt:
1721
816
if debug:
1722
print >> sys.stderr
1723
logger.debug(u"Server received KeyboardInterrupt")
1724
logger.debug(u"Server exiting")
817
print
1725
818
1726
819
if __name__ == '__main__':
1727
820
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0