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- Committer: Björn Påhlsson
- Date: 2008-07-20 02:52:20 UTC
- Revision ID: belorn@braxen-20080720025220-r5u0388uy9iu23h6
Added following support:
Pluginbased client handler
rewritten Mandos client
Avahi instead of udp server discovery
openpgp encrypted key support
Passprompt stand alone application for direct console input
Added logging for Mandos server
Pluginbased client handler
rewritten Mandos client
Avahi instead of udp server discovery
openpgp encrypted key support
Passprompt stand alone application for direct console input
Added logging for Mandos server
- files added:
- ca.pem
- files removed:
- .bzr-builddeb
- debian
- debian/po
- files renamed:
- clients.conf => mandos-clients.conf
- plugin-runner.c => plugbasedclient.c
- plugins.d/mandos-client.c => plugins.d/mandosclient.c
- plugins.d/password-prompt.c => plugins.d/passprompt.c
- mandos => server.py
- files modified:
- Makefile
added
removed
server.py
1
1
#!/usr/bin/python
2
# -*- mode: python; coding: utf-8 -*-
3
#
4
# Mandos server - give out binary blobs to connecting clients.
5
#
6
# This program is partly derived from an example program for an Avahi
7
# service publisher, downloaded from
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".
12
#
13
# Everything else is
14
# Copyright © 2008,2009 Teddy Hogeborn
15
# Copyright © 2008,2009 Björn Påhlsson
16
#
17
# This program is free software: you can redistribute it and/or modify
18
# it under the terms of the GNU General Public License as published by
19
# the Free Software Foundation, either version 3 of the License, or
20
# (at your option) any later version.
21
#
22
# This program is distributed in the hope that it will be useful,
23
# but WITHOUT ANY WARRANTY; without even the implied warranty of
24
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
25
# GNU General Public License for more details.
26
#
27
# 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/>.
30
#
31
# Contact the authors at <mandos@fukt.bsnet.se>.
32
#
33
34
from __future__ import division, with_statement, absolute_import
35
36
import SocketServer as socketserver
2
3
from __future__ import division
4
5
import SocketServer
37
6
import socket
38
import optparse
7
import select
8
from optparse import OptionParser
39
9
import datetime
40
10
import errno
41
11
import gnutls.crypto
44
14
import gnutls.library.functions
45
15
import gnutls.library.constants
46
16
import gnutls.library.types
47
import ConfigParser as configparser
17
import ConfigParser
48
18
import sys
49
19
import re
50
20
import os
51
21
import signal
22
from sets import Set
52
23
import subprocess
53
import atexit
54
import stat
55
import logging
56
import logging.handlers
57
import pwd
58
from contextlib import closing
59
import struct
60
import fcntl
61
import functools
62
24
63
25
import dbus
64
import dbus.service
65
26
import gobject
66
27
import avahi
67
28
from dbus.mainloop.glib import DBusGMainLoop
68
29
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'))
91
logger.addHandler(syslogger)
92
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
99
class AvahiError(Exception):
100
def __init__(self, value, *args, **kwargs):
101
self.value = value
102
super(AvahiError, self).__init__(value, *args, **kwargs)
103
def __unicode__(self):
104
return unicode(repr(self.value))
105
106
class AvahiServiceError(AvahiError):
107
pass
108
109
class AvahiGroupError(AvahiError):
110
pass
111
112
113
class AvahiService(object):
114
"""An Avahi (Zeroconf) service.
115
116
Attributes:
117
interface: integer; avahi.IF_UNSPEC or an interface index.
118
Used to optionally bind to the specified interface.
119
name: string; Example: u'Mandos'
120
type: string; Example: u'_mandos._tcp'.
121
See <http://www.dns-sd.org/ServiceTypes.html>
122
port: integer; what port to announce
123
TXT: list of strings; TXT record for the service
124
domain: string; Domain to publish on, default to .local if empty.
125
host: string; Host to publish records for, default is localhost
126
max_renames: integer; maximum number of renames
127
rename_count: integer; counter so we only rename after collisions
128
a sensible number of times
129
group: D-Bus Entry Group
130
server: D-Bus Server
131
bus: dbus.SystemBus()
132
"""
133
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):
137
self.interface = interface
138
self.name = name
139
self.type = servicetype
140
self.port = port
141
self.TXT = TXT if TXT is not None else []
142
self.domain = domain
143
self.host = host
144
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
def rename(self):
151
"""Derived from the Avahi example code"""
152
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))
164
self.remove()
165
self.add()
166
self.rename_count += 1
167
def remove(self):
168
"""Derived from the Avahi example code"""
169
if self.group is not None:
170
self.group.Reset()
171
def add(self):
172
"""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())
30
31
import logging
32
import logging.handlers
33
34
# logghandler.setFormatter(logging.Formatter('%(levelname)s %(message)s')
35
36
logger = logging.Logger('mandos')
37
logger.addHandler(logging.handlers.SysLogHandler(facility = logging.handlers.SysLogHandler.LOG_DAEMON))
38
39
# This variable is used to optionally bind to a specified interface.
40
# It is a global variable to fit in with the other variables from the
41
# Avahi server example code.
42
serviceInterface = avahi.IF_UNSPEC
43
# From the Avahi server example code:
44
serviceName = "Mandos"
45
serviceType = "_mandos._tcp" # http://www.dns-sd.org/ServiceTypes.html
46
servicePort = None # Not known at startup
47
serviceTXT = [] # TXT record for the service
48
domain = "" # Domain to publish on, default to .local
49
host = "" # Host to publish records for, default to localhost
50
group = None #our entry group
51
rename_count = 12 # Counter so we only rename after collisions a
52
# sensible number of times
53
# End of Avahi example code
228
54
229
55
230
56
class Client(object):
231
57
"""A representation of a client host served by this server.
232
233
58
Attributes:
234
name: string; from the config file, used in log messages and
235
D-Bus identifiers
59
name: string; from the config file, used in log messages
236
60
fingerprint: string (40 or 32 hexadecimal digits); used to
237
61
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.
62
secret: bytestring; sent verbatim (over TLS) to client
63
fqdn: string (FQDN); available for use by the checker command
64
created: datetime.datetime()
65
last_seen: datetime.datetime() or None if not yet seen
66
timeout: datetime.timedelta(); How long from last_seen until
67
this client is invalid
68
interval: datetime.timedelta(); How often to start a new checker
69
stop_hook: If set, called by stop() as stop_hook(self)
70
checker: subprocess.Popen(); a running checker process used
71
to see if the client lives.
72
Is None if no process is running.
251
73
checker_initiator_tag: a gobject event source tag, or None
252
disable_initiator_tag: - '' -
74
stop_initiator_tag: - '' -
253
75
checker_callback_tag: - '' -
254
76
checker_command: string; External command which is run to check if
255
client lives. %() expansions are done at
77
client lives. %()s expansions are done at
256
78
runtime with vars(self) as dict, so that for
257
79
instance %(name)s can be used in the command.
258
current_checker_command: string; current running checker_command
80
Private attibutes:
81
_timeout: Real variable for 'timeout'
82
_interval: Real variable for 'interval'
83
_timeout_milliseconds: Used by gobject.timeout_add()
84
_interval_milliseconds: - '' -
259
85
"""
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):
277
"""Note: the 'checker' key in 'config' sets the
278
'checker_command' attribute and *not* the 'checker'
279
attribute."""
86
def _set_timeout(self, timeout):
87
"Setter function for 'timeout' attribute"
88
self._timeout = timeout
89
self._timeout_milliseconds = ((self.timeout.days
90
* 24 * 60 * 60 * 1000)
91
+ (self.timeout.seconds * 1000)
92
+ (self.timeout.microseconds
93
// 1000))
94
timeout = property(lambda self: self._timeout,
95
_set_timeout)
96
del _set_timeout
97
def _set_interval(self, interval):
98
"Setter function for 'interval' attribute"
99
self._interval = interval
100
self._interval_milliseconds = ((self.interval.days
101
* 24 * 60 * 60 * 1000)
102
+ (self.interval.seconds
103
* 1000)
104
+ (self.interval.microseconds
105
// 1000))
106
interval = property(lambda self: self._interval,
107
_set_interval)
108
del _set_interval
109
def __init__(self, name=None, options=None, stop_hook=None,
110
fingerprint=None, secret=None, secfile=None, fqdn=None,
111
timeout=None, interval=-1, checker=None):
280
112
self.name = name
281
if config is None:
282
config = {}
283
logger.debug(u"Creating client %r", self.name)
284
# Uppercase and remove spaces from fingerprint for later
285
# comparison purposes with return value from the fingerprint()
286
# function
287
self.fingerprint = (config[u"fingerprint"].upper()
288
.replace(u" ", u""))
289
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()
298
else:
299
raise TypeError(u"No secret or secfile for client %s"
300
% 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
305
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
113
# Uppercase and remove spaces from fingerprint
114
# for later comparison purposes with return value of
115
# the fingerprint() function
116
self.fingerprint = fingerprint.upper().replace(u" ", u"")
117
if secret:
118
self.secret = secret.decode(u"base64")
119
elif secfile:
120
sf = open(secfile)
121
self.secret = sf.read()
122
sf.close()
123
else:
124
raise RuntimeError(u"No secret or secfile for client %s"
125
% self.name)
126
self.fqdn = fqdn # string
127
self.created = datetime.datetime.now()
128
self.last_seen = None
129
if timeout is None:
130
timeout = options.timeout
131
self.timeout = timeout
132
if interval == -1:
133
interval = options.interval
134
else:
135
interval = string_to_delta(interval)
136
self.interval = interval
137
self.stop_hook = stop_hook
309
138
self.checker = None
310
139
self.checker_initiator_tag = None
311
self.disable_initiator_tag = None
140
self.stop_initiator_tag = None
312
141
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):
318
"""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()
142
self.check_command = checker
143
def start(self):
144
"""Start this clients checker and timeout hooks"""
323
145
# Schedule a new checker to be started an 'interval' from now,
324
146
# and every interval from then on.
325
self.checker_initiator_tag = (gobject.timeout_add
326
(self.interval_milliseconds(),
327
self.start_checker))
147
self.checker_initiator_tag = gobject.timeout_add\
148
(self._interval_milliseconds,
149
self.start_checker)
328
150
# Also start a new checker *right now*.
329
151
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):
339
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):
152
# Schedule a stop() when 'timeout' has passed
153
self.stop_initiator_tag = gobject.timeout_add\
154
(self._timeout_milliseconds,
155
self.stop)
156
def stop(self):
157
"""Stop this client.
158
The possibility that this client might be restarted is left
159
open, but not currently used."""
160
logger.debug(u"Stopping client %s", self.name)
161
self.secret = None
162
if self.stop_initiator_tag:
163
gobject.source_remove(self.stop_initiator_tag)
164
self.stop_initiator_tag = None
165
if self.checker_initiator_tag:
345
166
gobject.source_remove(self.checker_initiator_tag)
346
167
self.checker_initiator_tag = None
347
168
self.stop_checker()
348
if self.disable_hook:
349
self.disable_hook(self)
350
self.enabled = False
169
if self.stop_hook:
170
self.stop_hook(self)
351
171
# Do not run this again if called by a gobject.timeout_add
352
172
return False
353
354
173
def __del__(self):
355
self.disable_hook = None
356
self.disable()
357
358
def checker_callback(self, pid, condition, command):
174
# Some code duplication here and in stop()
175
if hasattr(self, "stop_initiator_tag") \
176
and self.stop_initiator_tag:
177
gobject.source_remove(self.stop_initiator_tag)
178
self.stop_initiator_tag = None
179
if hasattr(self, "checker_initiator_tag") \
180
and self.checker_initiator_tag:
181
gobject.source_remove(self.checker_initiator_tag)
182
self.checker_initiator_tag = None
183
self.stop_checker()
184
def checker_callback(self, pid, condition):
359
185
"""The checker has completed, so take appropriate actions."""
360
self.checker_callback_tag = None
361
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:
186
now = datetime.datetime.now()
187
if os.WIFEXITED(condition) \
188
and (os.WEXITSTATUS(condition) == 0):
189
logger.debug(u"Checker for %(name)s succeeded",
190
vars(self))
191
self.last_seen = now
192
gobject.source_remove(self.stop_initiator_tag)
193
self.stop_initiator_tag = gobject.timeout_add\
194
(self._timeout_milliseconds,
195
self.stop)
196
if not os.WIFEXITED(condition):
372
197
logger.warning(u"Checker for %(name)s crashed?",
373
198
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
199
else:
200
logger.debug(u"Checker for %(name)s failed",
201
vars(self))
202
self.checker = None
203
self.checker_callback_tag = None
387
204
def start_checker(self):
388
205
"""Start a new checker subprocess if one is not running.
389
390
206
If a checker already exists, leave it running and do
391
207
nothing."""
392
# The reason for not killing a running checker is that if we
393
# did that, then if a checker (for some reason) started
394
# running slowly and taking more than 'interval' time, the
395
# client would inevitably timeout, since no checker would get
396
# a chance to run to completion. If we instead leave running
397
# checkers alone, the checker would have to take more time
398
# than 'timeout' for the client to be declared invalid, which
399
# 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
208
if self.checker is None:
209
logger.debug(u"Starting checker for %s",
210
self.name)
416
211
try:
417
# In case checker_command has exactly one % operator
418
command = self.checker_command % self.host
212
command = self.check_command % self.fqdn
419
213
except TypeError:
420
# Escape attributes for the shell
421
escaped_attrs = dict((key,
422
re.escape(unicode(str(val),
423
errors=
424
u'replace')))
214
escaped_attrs = dict((key, re.escape(str(val)))
425
215
for key, val in
426
216
vars(self).iteritems())
427
217
try:
428
command = self.checker_command % escaped_attrs
218
command = self.check_command % escaped_attrs
429
219
except TypeError, error:
430
logger.error(u'Could not format string "%s":'
431
u' %s', self.checker_command, error)
220
logger.critical(u'Could not format string "%s": %s',
221
self.check_command, error)
432
222
return True # Try again later
433
self.current_checker_command = command
434
223
try:
435
logger.info(u"Starting checker %r for %s",
436
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
self.checker = subprocess.Popen(command,
442
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:
224
self.checker = subprocess.\
225
Popen(command,
226
stdout=subprocess.PIPE,
227
close_fds=True, shell=True,
228
cwd="/")
229
self.checker_callback_tag = gobject.\
230
child_watch_add(self.checker.pid,
231
self.\
232
checker_callback)
233
except subprocess.OSError, error:
455
234
logger.error(u"Failed to start subprocess: %s",
456
235
error)
457
236
# Re-run this periodically if run by gobject.timeout_add
458
237
return True
459
460
238
def stop_checker(self):
461
239
"""Force the checker process, if any, to stop."""
462
if self.checker_callback_tag:
463
gobject.source_remove(self.checker_callback_tag)
464
self.checker_callback_tag = None
465
if getattr(self, u"checker", None) is None:
240
if not hasattr(self, "checker") or self.checker is None:
466
241
return
467
logger.debug(u"Stopping checker for %(name)s", vars(self))
468
try:
469
os.kill(self.checker.pid, signal.SIGTERM)
470
#os.sleep(0.5)
471
#if self.checker.poll() is None:
472
# os.kill(self.checker.pid, signal.SIGKILL)
473
except OSError, error:
474
if error.errno != errno.ESRCH: # No such process
475
raise
242
gobject.source_remove(self.checker_callback_tag)
243
self.checker_callback_tag = None
244
os.kill(self.checker.pid, signal.SIGTERM)
245
if self.checker.poll() is None:
246
os.kill(self.checker.pid, signal.SIGKILL)
476
247
self.checker = None
477
478
def still_valid(self):
248
def still_valid(self, now=None):
479
249
"""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()
483
if self.last_checked_ok is None:
250
if now is None:
251
now = datetime.datetime.now()
252
if self.last_seen is None:
484
253
return now < (self.created + self.timeout)
485
254
else:
486
return now < (self.last_checked_ok + self.timeout)
487
488
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.
255
return now < (self.last_seen + self.timeout)
256
257
258
def peer_certificate(session):
259
# If not an OpenPGP certificate...
260
if gnutls.library.functions.gnutls_certificate_type_get\
261
(session._c_object) \
262
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP:
263
# ...do the normal thing
264
return session.peer_certificate
265
list_size = ctypes.c_uint()
266
cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
267
(session._c_object, ctypes.byref(list_size))
268
if list_size.value == 0:
269
return None
270
cert = cert_list[0]
271
return ctypes.string_at(cert.data, cert.size)
272
273
274
def fingerprint(openpgp):
275
# New empty GnuTLS certificate
276
crt = gnutls.library.types.gnutls_openpgp_crt_t()
277
gnutls.library.functions.gnutls_openpgp_crt_init\
278
(ctypes.byref(crt))
279
# New GnuTLS "datum" with the OpenPGP public key
280
datum = gnutls.library.types.gnutls_datum_t\
281
(ctypes.cast(ctypes.c_char_p(openpgp),
282
ctypes.POINTER(ctypes.c_ubyte)),
283
ctypes.c_uint(len(openpgp)))
284
# Import the OpenPGP public key into the certificate
285
ret = gnutls.library.functions.gnutls_openpgp_crt_import\
286
(crt,
287
ctypes.byref(datum),
288
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
289
# New buffer for the fingerprint
290
buffer = ctypes.create_string_buffer(20)
291
buffer_length = ctypes.c_size_t()
292
# Get the fingerprint from the certificate into the buffer
293
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
294
(crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
295
# Deinit the certificate
296
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
297
# Convert the buffer to a Python bytestring
298
fpr = ctypes.string_at(buffer, buffer_length.value)
299
# Convert the bytestring to hexadecimal notation
300
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
301
return hex_fpr
302
303
304
class tcp_handler(SocketServer.BaseRequestHandler, object):
305
"""A TCP request handler class.
306
Instantiated by IPv6_TCPServer for each request to handle it.
983
307
Note: This will run in its own forked process."""
984
308
985
309
def handle(self):
986
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
310
logger.debug(u"TCP connection from: %s",
311
unicode(self.client_address))
312
session = gnutls.connection.ClientSession(self.request,
313
gnutls.connection.\
314
X509Credentials())
315
316
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
317
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
318
# "+DHE-DSS"))
319
priority = "SECURE256"
320
321
gnutls.library.functions.gnutls_priority_set_direct\
322
(session._c_object, priority, None);
323
324
try:
325
session.handshake()
326
except gnutls.errors.GNUTLSError, error:
327
logger.debug(u"Handshake failed: %s", error)
328
# Do not run session.bye() here: the session is not
329
# established. Just abandon the request.
330
return
331
try:
332
fpr = fingerprint(peer_certificate(session))
333
except (TypeError, gnutls.errors.GNUTLSError), error:
334
logger.debug(u"Bad certificate: %s", error)
335
session.bye()
336
return
337
logger.debug(u"Fingerprint: %s", fpr)
338
client = None
339
for c in clients:
340
if c.fingerprint == fpr:
341
client = c
342
break
343
# Have to check if client.still_valid(), since it is possible
344
# that the client timed out while establishing the GnuTLS
345
# session.
346
if (not client) or (not client.still_valid()):
347
if client:
348
logger.debug(u"Client %(name)s is invalid",
349
vars(client))
1042
350
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
351
logger.debug(u"Client not found for fingerprint: %s",
352
fpr)
1062
353
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
354
return
355
sent_size = 0
356
while sent_size < len(client.secret):
357
sent = session.send(client.secret[sent_size:])
358
logger.debug(u"Sent: %d, remaining: %d",
359
sent, len(client.secret)
360
- (sent_size + sent))
361
sent_size += sent
362
session.bye()
363
364
365
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
366
"""IPv6 TCP server. Accepts 'None' as address and/or port.
1149
367
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
368
options: Command line options
369
clients: Set() of Client objects
1153
370
"""
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)
371
address_family = socket.AF_INET6
372
def __init__(self, *args, **kwargs):
373
if "options" in kwargs:
374
self.options = kwargs["options"]
375
del kwargs["options"]
376
if "clients" in kwargs:
377
self.clients = kwargs["clients"]
378
del kwargs["clients"]
379
return super(type(self), self).__init__(*args, **kwargs)
1161
380
def server_bind(self):
1162
381
"""This overrides the normal server_bind() function
1163
382
to bind to an interface if one was specified, and also NOT to
1164
383
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
384
if self.options.interface:
385
if not hasattr(socket, "SO_BINDTODEVICE"):
386
# From /usr/include/asm-i486/socket.h
387
socket.SO_BINDTODEVICE = 25
388
try:
389
self.socket.setsockopt(socket.SOL_SOCKET,
390
socket.SO_BINDTODEVICE,
391
self.options.interface)
392
except socket.error, error:
393
if error[0] == errno.EPERM:
394
logger.warning(u"No permission to"
395
u" bind to interface %s",
396
self.options.interface)
397
else:
398
raise error
1187
399
# Only bind(2) the socket if we really need to.
1188
400
if self.server_address[0] or self.server_address[1]:
1189
401
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,
402
in6addr_any = "::"
403
self.server_address = (in6addr_any,
1195
404
self.server_address[1])
1196
elif not self.server_address[1]:
405
elif self.server_address[1] is None:
1197
406
self.server_address = (self.server_address[0],
1198
407
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
408
return super(type(self), self).server_bind()
1310
409
1311
410
1312
411
def string_to_delta(interval):
1313
412
"""Parse a string and return a datetime.timedelta
1314
1315
>>> string_to_delta(u'7d')
413
414
>>> string_to_delta('7d')
1316
415
datetime.timedelta(7)
1317
>>> string_to_delta(u'60s')
416
>>> string_to_delta('60s')
1318
417
datetime.timedelta(0, 60)
1319
>>> string_to_delta(u'60m')
418
>>> string_to_delta('60m')
1320
419
datetime.timedelta(0, 3600)
1321
>>> string_to_delta(u'24h')
420
>>> string_to_delta('24h')
1322
421
datetime.timedelta(1)
1323
422
>>> string_to_delta(u'1w')
1324
423
datetime.timedelta(7)
1325
>>> string_to_delta(u'5m 30s')
1326
datetime.timedelta(0, 330)
1327
424
"""
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):
425
try:
426
suffix=unicode(interval[-1])
427
value=int(interval[:-1])
428
if suffix == u"d":
429
delta = datetime.timedelta(value)
430
elif suffix == u"s":
431
delta = datetime.timedelta(0, value)
432
elif suffix == u"m":
433
delta = datetime.timedelta(0, 0, 0, 0, value)
434
elif suffix == u"h":
435
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
436
elif suffix == u"w":
437
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
438
else:
1346
439
raise ValueError
1347
timevalue += delta
1348
return timevalue
440
except (ValueError, IndexError):
441
raise ValueError
442
return delta
443
444
445
def add_service():
446
"""From the Avahi server example code"""
447
global group, serviceName, serviceType, servicePort, serviceTXT, \
448
domain, host
449
if group is None:
450
group = dbus.Interface(
451
bus.get_object( avahi.DBUS_NAME,
452
server.EntryGroupNew()),
453
avahi.DBUS_INTERFACE_ENTRY_GROUP)
454
group.connect_to_signal('StateChanged',
455
entry_group_state_changed)
456
logger.debug(u"Adding service '%s' of type '%s' ...",
457
serviceName, serviceType)
458
459
group.AddService(
460
serviceInterface, # interface
461
avahi.PROTO_INET6, # protocol
462
dbus.UInt32(0), # flags
463
serviceName, serviceType,
464
domain, host,
465
dbus.UInt16(servicePort),
466
avahi.string_array_to_txt_array(serviceTXT))
467
group.Commit()
468
469
470
def remove_service():
471
"""From the Avahi server example code"""
472
global group
473
474
if not group is None:
475
group.Reset()
476
477
478
def server_state_changed(state):
479
"""From the Avahi server example code"""
480
if state == avahi.SERVER_COLLISION:
481
logger.warning(u"Server name collision")
482
remove_service()
483
elif state == avahi.SERVER_RUNNING:
484
add_service()
485
486
487
def entry_group_state_changed(state, error):
488
"""From the Avahi server example code"""
489
global serviceName, server, rename_count
490
491
logger.debug(u"state change: %i", state)
492
493
if state == avahi.ENTRY_GROUP_ESTABLISHED:
494
logger.debug(u"Service established.")
495
elif state == avahi.ENTRY_GROUP_COLLISION:
496
497
rename_count = rename_count - 1
498
if rename_count > 0:
499
name = server.GetAlternativeServiceName(name)
500
logger.warning(u"Service name collision, "
501
u"changing name to '%s' ...", name)
502
remove_service()
503
add_service()
504
505
else:
506
logger.error(u"No suitable service name found "
507
u"after %i retries, exiting.",
508
n_rename)
509
main_loop.quit()
510
elif state == avahi.ENTRY_GROUP_FAILURE:
511
logger.error(u"Error in group state changed %s",
512
unicode(error))
513
main_loop.quit()
514
return
1349
515
1350
516
1351
517
def if_nametoindex(interface):
1352
"""Call the C function if_nametoindex(), or equivalent
1353
1354
Note: This function cannot accept a unicode string."""
1355
global if_nametoindex
518
"""Call the C function if_nametoindex()"""
1356
519
try:
1357
if_nametoindex = (ctypes.cdll.LoadLibrary
1358
(ctypes.util.find_library(u"c"))
1359
.if_nametoindex)
520
libc = ctypes.cdll.LoadLibrary("libc.so.6")
521
return libc.if_nametoindex(interface)
1360
522
except (OSError, AttributeError):
1361
logger.warning(u"Doing if_nametoindex the hard way")
1362
def if_nametoindex(interface):
1363
"Get an interface index the hard way, i.e. using fcntl()"
1364
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]
1371
return interface_index
1372
return if_nametoindex(interface)
1373
1374
1375
def daemon(nochdir = False, noclose = False):
1376
"""See daemon(3). Standard BSD Unix function.
1377
1378
This should really exist as os.daemon, but it doesn't (yet)."""
1379
if os.fork():
1380
sys.exit()
1381
os.setsid()
1382
if not nochdir:
1383
os.chdir(u"/")
1384
if os.fork():
1385
sys.exit()
1386
if not noclose:
1387
# Close all standard open file descriptors
1388
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1389
if not stat.S_ISCHR(os.fstat(null).st_mode):
1390
raise OSError(errno.ENODEV,
1391
u"/dev/null not a character device")
1392
os.dup2(null, sys.stdin.fileno())
1393
os.dup2(null, sys.stdout.fileno())
1394
os.dup2(null, sys.stderr.fileno())
1395
if null > 2:
1396
os.close(null)
1397
1398
1399
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]
523
if "struct" not in sys.modules:
524
import struct
525
if "fcntl" not in sys.modules:
526
import fcntl
527
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
528
s = socket.socket()
529
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
530
struct.pack("16s16x", interface))
531
s.close()
532
interface_index = struct.unpack("I", ifreq[16:20])[0]
533
return interface_index
534
535
536
if __name__ == '__main__':
537
parser = OptionParser()
538
parser.add_option("-i", "--interface", type="string",
539
default=None, metavar="IF",
540
help="Bind to interface IF")
541
parser.add_option("--cert", type="string", default="cert.pem",
542
metavar="FILE",
543
help="Public key certificate PEM file to use")
544
parser.add_option("--key", type="string", default="key.pem",
545
metavar="FILE",
546
help="Private key PEM file to use")
547
parser.add_option("--ca", type="string", default="ca.pem",
548
metavar="FILE",
549
help="Certificate Authority certificate PEM file to use")
550
parser.add_option("--crl", type="string", default="crl.pem",
551
metavar="FILE",
552
help="Certificate Revokation List PEM file to use")
553
parser.add_option("-p", "--port", type="int", default=None,
554
help="Port number to receive requests on")
555
parser.add_option("--timeout", type="string", # Parsed later
556
default="1h",
557
help="Amount of downtime allowed for clients")
558
parser.add_option("--interval", type="string", # Parsed later
559
default="5m",
560
help="How often to check that a client is up")
561
parser.add_option("--check", action="store_true", default=False,
562
help="Run self-test")
563
parser.add_option("--debug", action="store_true", default=False,
564
help="Debug mode")
565
(options, args) = parser.parse_args()
1430
566
1431
567
if options.check:
1432
568
import doctest
1433
569
doctest.testmod()
1434
570
sys.exit()
1435
571
1436
# 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",
1446
}
1447
1448
# Parse config file for server-global settings
1449
server_config = configparser.SafeConfigParser(server_defaults)
1450
del server_defaults
1451
server_config.read(os.path.join(options.configdir,
1452
u"mandos.conf"))
1453
# 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")
1462
del server_config
1463
1464
# Override the settings from the config file with command line
1465
# 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"):
1469
value = getattr(options, option)
1470
if value is not None:
1471
server_settings[option] = value
1472
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
# Now we have our good server settings in "server_settings"
1478
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
# 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"",
1501
}
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))
1556
1557
global main_loop
1558
# From the Avahi example code
572
# Parse the time arguments
573
try:
574
options.timeout = string_to_delta(options.timeout)
575
except ValueError:
576
parser.error("option --timeout: Unparseable time")
577
try:
578
options.interval = string_to_delta(options.interval)
579
except ValueError:
580
parser.error("option --interval: Unparseable time")
581
582
# Parse config file
583
defaults = { "checker": "sleep 1; fping -q -- %%(fqdn)s" }
584
client_config = ConfigParser.SafeConfigParser(defaults)
585
#client_config.readfp(open("secrets.conf"), "secrets.conf")
586
client_config.read("mandos-clients.conf")
587
588
# From the Avahi server example code
1559
589
DBusGMainLoop(set_as_default=True )
1560
590
main_loop = gobject.MainLoop()
1561
591
bus = dbus.SystemBus()
1562
# 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
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")
1582
1583
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.
1593
daemon()
1594
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
def cleanup():
1609
"Cleanup function; run on exit"
1610
service.cleanup()
1611
1612
while tcp_server.clients:
1613
client = tcp_server.clients.pop()
1614
client.disable_hook = None
1615
client.disable()
1616
1617
atexit.register(cleanup)
1618
1619
if not debug:
1620
signal.signal(signal.SIGINT, signal.SIG_IGN)
1621
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1622
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1623
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
1689
# Find out what port we got
1690
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())
1698
1699
#service.interface = tcp_server.socket.getsockname()[3]
1700
1701
try:
1702
# From the Avahi example code
1703
try:
1704
service.activate()
1705
except dbus.exceptions.DBusException, error:
1706
logger.critical(u"DBusException: %s", error)
1707
sys.exit(1)
1708
# End of Avahi example code
1709
1710
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
1711
lambda *args, **kwargs:
1712
(tcp_server.handle_request
1713
(*args[2:], **kwargs) or True))
1714
1715
logger.debug(u"Starting main loop")
592
server = dbus.Interface(
593
bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
594
avahi.DBUS_INTERFACE_SERVER )
595
# End of Avahi example code
596
597
debug = options.debug
598
599
clients = Set()
600
def remove_from_clients(client):
601
clients.remove(client)
602
if not clients:
603
logger.debug(u"No clients left, exiting")
604
main_loop.quit()
605
606
clients.update(Set(Client(name=section, options=options,
607
stop_hook = remove_from_clients,
608
**(dict(client_config\
609
.items(section))))
610
for section in client_config.sections()))
611
for client in clients:
612
client.start()
613
614
tcp_server = IPv6_TCPServer((None, options.port),
615
tcp_handler,
616
options=options,
617
clients=clients)
618
# Find out what random port we got
619
servicePort = tcp_server.socket.getsockname()[1]
620
logger.debug(u"Now listening on port %d", servicePort)
621
622
if options.interface is not None:
623
serviceInterface = if_nametoindex(options.interface)
624
625
# From the Avahi server example code
626
server.connect_to_signal("StateChanged", server_state_changed)
627
server_state_changed(server.GetState())
628
# End of Avahi example code
629
630
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
631
lambda *args, **kwargs:
632
tcp_server.handle_request(*args[2:],
633
**kwargs) or True)
634
try:
1716
635
main_loop.run()
1717
except AvahiError, error:
1718
logger.critical(u"AvahiError: %s", error)
1719
sys.exit(1)
1720
636
except KeyboardInterrupt:
1721
if debug:
1722
print >> sys.stderr
1723
logger.debug(u"Server received KeyboardInterrupt")
1724
logger.debug(u"Server exiting")
637
print
638
639
# Cleanup here
1725
640
1726
if __name__ == '__main__':
1727
main()
641
# From the Avahi server example code
642
if not group is None:
643
group.Free()
644
# End of Avahi example code
645
646
for client in clients:
647
client.stop_hook = None
648
client.stop()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0