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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
import contextlib
59
import struct
60
import fcntl
61
import functools
62
import cPickle as pickle
63
24
64
25
import dbus
65
import dbus.service
66
26
import gobject
67
27
import avahi
68
28
from dbus.mainloop.glib import DBusGMainLoop
69
29
import ctypes
70
import ctypes.util
71
import xml.dom.minidom
72
import inspect
73
74
try:
75
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
76
except AttributeError:
77
try:
78
from IN import SO_BINDTODEVICE
79
except ImportError:
80
SO_BINDTODEVICE = None
81
82
83
version = "1.0.14"
84
85
logger = logging.Logger(u'mandos')
86
syslogger = (logging.handlers.SysLogHandler
87
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
88
address = "/dev/log"))
89
syslogger.setFormatter(logging.Formatter
90
(u'Mandos [%(process)d]: %(levelname)s:'
91
u' %(message)s'))
92
logger.addHandler(syslogger)
93
94
console = logging.StreamHandler()
95
console.setFormatter(logging.Formatter(u'%(name)s [%(process)d]:'
96
u' %(levelname)s:'
97
u' %(message)s'))
98
logger.addHandler(console)
99
100
class AvahiError(Exception):
101
def __init__(self, value, *args, **kwargs):
102
self.value = value
103
super(AvahiError, self).__init__(value, *args, **kwargs)
104
def __unicode__(self):
105
return unicode(repr(self.value))
106
107
class AvahiServiceError(AvahiError):
108
pass
109
110
class AvahiGroupError(AvahiError):
111
pass
112
113
114
class AvahiService(object):
115
"""An Avahi (Zeroconf) service.
116
117
Attributes:
118
interface: integer; avahi.IF_UNSPEC or an interface index.
119
Used to optionally bind to the specified interface.
120
name: string; Example: u'Mandos'
121
type: string; Example: u'_mandos._tcp'.
122
See <http://www.dns-sd.org/ServiceTypes.html>
123
port: integer; what port to announce
124
TXT: list of strings; TXT record for the service
125
domain: string; Domain to publish on, default to .local if empty.
126
host: string; Host to publish records for, default is localhost
127
max_renames: integer; maximum number of renames
128
rename_count: integer; counter so we only rename after collisions
129
a sensible number of times
130
group: D-Bus Entry Group
131
server: D-Bus Server
132
bus: dbus.SystemBus()
133
"""
134
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
135
servicetype = None, port = None, TXT = None,
136
domain = u"", host = u"", max_renames = 32768,
137
protocol = avahi.PROTO_UNSPEC, bus = None):
138
self.interface = interface
139
self.name = name
140
self.type = servicetype
141
self.port = port
142
self.TXT = TXT if TXT is not None else []
143
self.domain = domain
144
self.host = host
145
self.rename_count = 0
146
self.max_renames = max_renames
147
self.protocol = protocol
148
self.group = None # our entry group
149
self.server = None
150
self.bus = bus
151
def rename(self):
152
"""Derived from the Avahi example code"""
153
if self.rename_count >= self.max_renames:
154
logger.critical(u"No suitable Zeroconf service name found"
155
u" after %i retries, exiting.",
156
self.rename_count)
157
raise AvahiServiceError(u"Too many renames")
158
self.name = self.server.GetAlternativeServiceName(self.name)
159
logger.info(u"Changing Zeroconf service name to %r ...",
160
unicode(self.name))
161
syslogger.setFormatter(logging.Formatter
162
(u'Mandos (%s) [%%(process)d]:'
163
u' %%(levelname)s: %%(message)s'
164
% self.name))
165
self.remove()
166
self.add()
167
self.rename_count += 1
168
def remove(self):
169
"""Derived from the Avahi example code"""
170
if self.group is not None:
171
self.group.Reset()
172
def add(self):
173
"""Derived from the Avahi example code"""
174
if self.group is None:
175
self.group = dbus.Interface(
176
self.bus.get_object(avahi.DBUS_NAME,
177
self.server.EntryGroupNew()),
178
avahi.DBUS_INTERFACE_ENTRY_GROUP)
179
self.group.connect_to_signal('StateChanged',
180
self
181
.entry_group_state_changed)
182
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
183
self.name, self.type)
184
self.group.AddService(
185
self.interface,
186
self.protocol,
187
dbus.UInt32(0), # flags
188
self.name, self.type,
189
self.domain, self.host,
190
dbus.UInt16(self.port),
191
avahi.string_array_to_txt_array(self.TXT))
192
self.group.Commit()
193
def entry_group_state_changed(self, state, error):
194
"""Derived from the Avahi example code"""
195
logger.debug(u"Avahi state change: %i", state)
196
197
if state == avahi.ENTRY_GROUP_ESTABLISHED:
198
logger.debug(u"Zeroconf service established.")
199
elif state == avahi.ENTRY_GROUP_COLLISION:
200
logger.warning(u"Zeroconf service name collision.")
201
self.rename()
202
elif state == avahi.ENTRY_GROUP_FAILURE:
203
logger.critical(u"Avahi: Error in group state changed %s",
204
unicode(error))
205
raise AvahiGroupError(u"State changed: %s"
206
% unicode(error))
207
def cleanup(self):
208
"""Derived from the Avahi example code"""
209
if self.group is not None:
210
self.group.Free()
211
self.group = None
212
def server_state_changed(self, state):
213
"""Derived from the Avahi example code"""
214
if state == avahi.SERVER_COLLISION:
215
logger.error(u"Zeroconf server name collision")
216
self.remove()
217
elif state == avahi.SERVER_RUNNING:
218
self.add()
219
def activate(self):
220
"""Derived from the Avahi example code"""
221
if self.server is None:
222
self.server = dbus.Interface(
223
self.bus.get_object(avahi.DBUS_NAME,
224
avahi.DBUS_PATH_SERVER),
225
avahi.DBUS_INTERFACE_SERVER)
226
self.server.connect_to_signal(u"StateChanged",
227
self.server_state_changed)
228
self.server_state_changed(self.server.GetState())
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
229
54
230
55
231
56
class Client(object):
232
57
"""A representation of a client host served by this server.
233
234
58
Attributes:
235
name: string; from the config file, used in log messages and
236
D-Bus identifiers
59
name: string; from the config file, used in log messages
237
60
fingerprint: string (40 or 32 hexadecimal digits); used to
238
61
uniquely identify the client
239
secret: bytestring; sent verbatim (over TLS) to client
240
host: string; available for use by the checker command
241
created: datetime.datetime(); (UTC) object creation
242
last_enabled: datetime.datetime(); (UTC)
243
enabled: bool()
244
last_checked_ok: datetime.datetime(); (UTC) or None
245
timeout: datetime.timedelta(); How long from last_checked_ok
246
until this client is disabled
247
interval: datetime.timedelta(); How often to start a new checker
248
disable_hook: If set, called by disable() as disable_hook(self)
249
checker: subprocess.Popen(); a running checker process used
250
to see if the client lives.
251
'None' if no process is running.
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.
252
73
checker_initiator_tag: a gobject event source tag, or None
253
disable_initiator_tag: - '' -
74
stop_initiator_tag: - '' -
254
75
checker_callback_tag: - '' -
255
76
checker_command: string; External command which is run to check if
256
client lives. %() expansions are done at
77
client lives. %()s expansions are done at
257
78
runtime with vars(self) as dict, so that for
258
79
instance %(name)s can be used in the command.
259
current_checker_command: string; current running checker_command
260
changesignal: File descriptor; written to on object change
261
_reset: File descriptor; for flushing changesignal
262
delay: datetime.timedelta(); how long to wait for approval/secret
263
approved: bool(); None if not yet approved/disapproved
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: - '' -
264
85
"""
265
266
@staticmethod
267
def _timedelta_to_milliseconds(td):
268
"Convert a datetime.timedelta() to milliseconds"
269
return ((td.days * 24 * 60 * 60 * 1000)
270
+ (td.seconds * 1000)
271
+ (td.microseconds // 1000))
272
273
def timeout_milliseconds(self):
274
"Return the 'timeout' attribute in milliseconds"
275
return self._timedelta_to_milliseconds(self.timeout)
276
277
def interval_milliseconds(self):
278
"Return the 'interval' attribute in milliseconds"
279
return self._timedelta_to_milliseconds(self.interval)
280
281
def __init__(self, name = None, disable_hook=None, config=None):
282
"""Note: the 'checker' key in 'config' sets the
283
'checker_command' attribute and *not* the 'checker'
284
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):
285
112
self.name = name
286
if config is None:
287
config = {}
288
logger.debug(u"Creating client %r", self.name)
289
# Uppercase and remove spaces from fingerprint for later
290
# comparison purposes with return value from the fingerprint()
291
# function
292
self.fingerprint = (config[u"fingerprint"].upper()
293
.replace(u" ", u""))
294
logger.debug(u" Fingerprint: %s", self.fingerprint)
295
if u"secret" in config:
296
self._secret = config[u"secret"].decode(u"base64")
297
elif u"secfile" in config:
298
with open(os.path.expanduser(os.path.expandvars
299
(config[u"secfile"])),
300
"rb") as secfile:
301
self._secret = secfile.read()
302
else:
303
#XXX Need to allow secret on demand!
304
raise TypeError(u"No secret or secfile for client %s"
305
% self.name)
306
self.host = config.get(u"host", u"")
307
self.created = datetime.datetime.utcnow()
308
self.enabled = False
309
self.last_enabled = None
310
self.last_checked_ok = None
311
self.timeout = string_to_delta(config[u"timeout"])
312
self.interval = string_to_delta(config[u"interval"])
313
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
314
138
self.checker = None
315
139
self.checker_initiator_tag = None
316
self.disable_initiator_tag = None
140
self.stop_initiator_tag = None
317
141
self.checker_callback_tag = None
318
self.checker_command = config[u"checker"]
319
self.current_checker_command = None
320
self.last_connect = None
321
self.changesignal, self._reset = os.pipe()
322
self._approved = None #XXX should be based on configfile
323
self.delay = 10; #XXX Should be based on configfile
324
325
def setsecret(self, value):
326
self._secret = value
327
os.write(self.changesignal, "\0")
328
os.read(self._reset, 1)
329
330
secret = property(lambda self: self._secret, setsecret)
331
del setsecret
332
333
def setapproved(self, value):
334
self._approved = value
335
os.write(self.changesignal, "\0")
336
os.read(self._reset, 1)
337
338
approved = property(lambda self: self._approved, setapproved)
339
del setapproved
340
341
def enable(self):
342
"""Start this client's checker and timeout hooks"""
343
if getattr(self, u"enabled", False):
344
# Already enabled
345
return
346
self.last_enabled = datetime.datetime.utcnow()
142
self.check_command = checker
143
def start(self):
144
"""Start this clients checker and timeout hooks"""
347
145
# Schedule a new checker to be started an 'interval' from now,
348
146
# and every interval from then on.
349
self.checker_initiator_tag = (gobject.timeout_add
350
(self.interval_milliseconds(),
351
self.start_checker))
352
# Schedule a disable() when 'timeout' has passed
353
self.disable_initiator_tag = (gobject.timeout_add
354
(self.timeout_milliseconds(),
355
self.disable))
356
self.enabled = True
147
self.checker_initiator_tag = gobject.timeout_add\
148
(self._interval_milliseconds,
149
self.start_checker)
357
150
# Also start a new checker *right now*.
358
151
self.start_checker()
359
360
def disable(self, quiet=True):
361
"""Disable this client."""
362
if not getattr(self, "enabled", False):
363
return False
364
if not quiet:
365
logger.info(u"Disabling client %s", self.name)
366
if getattr(self, u"disable_initiator_tag", False):
367
gobject.source_remove(self.disable_initiator_tag)
368
self.disable_initiator_tag = None
369
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:
370
166
gobject.source_remove(self.checker_initiator_tag)
371
167
self.checker_initiator_tag = None
372
168
self.stop_checker()
373
if self.disable_hook:
374
self.disable_hook(self)
375
self.enabled = False
169
if self.stop_hook:
170
self.stop_hook(self)
376
171
# Do not run this again if called by a gobject.timeout_add
377
172
return False
378
379
173
def __del__(self):
380
self.disable_hook = None
381
self.disable()
382
383
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):
384
185
"""The checker has completed, so take appropriate actions."""
385
self.checker_callback_tag = None
386
self.checker = None
387
if os.WIFEXITED(condition):
388
exitstatus = os.WEXITSTATUS(condition)
389
if exitstatus == 0:
390
logger.info(u"Checker for %(name)s succeeded",
391
vars(self))
392
self.checked_ok()
393
else:
394
logger.info(u"Checker for %(name)s failed",
395
vars(self))
396
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):
397
197
logger.warning(u"Checker for %(name)s crashed?",
398
198
vars(self))
399
400
def checked_ok(self):
401
"""Bump up the timeout for this client.
402
403
This should only be called when the client has been seen,
404
alive and well.
405
"""
406
self.last_checked_ok = datetime.datetime.utcnow()
407
gobject.source_remove(self.disable_initiator_tag)
408
self.disable_initiator_tag = (gobject.timeout_add
409
(self.timeout_milliseconds(),
410
self.disable))
411
199
else:
200
logger.debug(u"Checker for %(name)s failed",
201
vars(self))
202
self.checker = None
203
self.checker_callback_tag = None
412
204
def start_checker(self):
413
205
"""Start a new checker subprocess if one is not running.
414
415
206
If a checker already exists, leave it running and do
416
207
nothing."""
417
# The reason for not killing a running checker is that if we
418
# did that, then if a checker (for some reason) started
419
# running slowly and taking more than 'interval' time, the
420
# client would inevitably timeout, since no checker would get
421
# a chance to run to completion. If we instead leave running
422
# checkers alone, the checker would have to take more time
423
# than 'timeout' for the client to be disabled, which is as it
424
# should be.
425
426
# If a checker exists, make sure it is not a zombie
427
try:
428
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
429
except (AttributeError, OSError), error:
430
if (isinstance(error, OSError)
431
and error.errno != errno.ECHILD):
432
raise error
433
else:
434
if pid:
435
logger.warning(u"Checker was a zombie")
436
gobject.source_remove(self.checker_callback_tag)
437
self.checker_callback(pid, status,
438
self.current_checker_command)
439
# Start a new checker if needed
440
208
if self.checker is None:
209
logger.debug(u"Starting checker for %s",
210
self.name)
441
211
try:
442
# In case checker_command has exactly one % operator
443
command = self.checker_command % self.host
212
command = self.check_command % self.fqdn
444
213
except TypeError:
445
# Escape attributes for the shell
446
escaped_attrs = dict((key,
447
re.escape(unicode(str(val),
448
errors=
449
u'replace')))
214
escaped_attrs = dict((key, re.escape(str(val)))
450
215
for key, val in
451
216
vars(self).iteritems())
452
217
try:
453
command = self.checker_command % escaped_attrs
218
command = self.check_command % escaped_attrs
454
219
except TypeError, error:
455
logger.error(u'Could not format string "%s":'
456
u' %s', self.checker_command, error)
220
logger.critical(u'Could not format string "%s": %s',
221
self.check_command, error)
457
222
return True # Try again later
458
self.current_checker_command = command
459
223
try:
460
logger.info(u"Starting checker %r for %s",
461
command, self.name)
462
# We don't need to redirect stdout and stderr, since
463
# in normal mode, that is already done by daemon(),
464
# and in debug mode we don't want to. (Stdin is
465
# always replaced by /dev/null.)
466
self.checker = subprocess.Popen(command,
467
close_fds=True,
468
shell=True, cwd=u"/")
469
self.checker_callback_tag = (gobject.child_watch_add
470
(self.checker.pid,
471
self.checker_callback,
472
data=command))
473
# The checker may have completed before the gobject
474
# watch was added. Check for this.
475
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
476
if pid:
477
gobject.source_remove(self.checker_callback_tag)
478
self.checker_callback(pid, status, command)
479
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:
480
234
logger.error(u"Failed to start subprocess: %s",
481
235
error)
482
236
# Re-run this periodically if run by gobject.timeout_add
483
237
return True
484
485
238
def stop_checker(self):
486
239
"""Force the checker process, if any, to stop."""
487
if self.checker_callback_tag:
488
gobject.source_remove(self.checker_callback_tag)
489
self.checker_callback_tag = None
490
if getattr(self, u"checker", None) is None:
240
if not hasattr(self, "checker") or self.checker is None:
491
241
return
492
logger.debug(u"Stopping checker for %(name)s", vars(self))
493
try:
494
os.kill(self.checker.pid, signal.SIGTERM)
495
#time.sleep(0.5)
496
#if self.checker.poll() is None:
497
# os.kill(self.checker.pid, signal.SIGKILL)
498
except OSError, error:
499
if error.errno != errno.ESRCH: # No such process
500
raise
501
self.checker = None
502
503
504
def dbus_service_property(dbus_interface, signature=u"v",
505
access=u"readwrite", byte_arrays=False):
506
"""Decorators for marking methods of a DBusObjectWithProperties to
507
become properties on the D-Bus.
508
509
The decorated method will be called with no arguments by "Get"
510
and with one argument by "Set".
511
512
The parameters, where they are supported, are the same as
513
dbus.service.method, except there is only "signature", since the
514
type from Get() and the type sent to Set() is the same.
515
"""
516
# Encoding deeply encoded byte arrays is not supported yet by the
517
# "Set" method, so we fail early here:
518
if byte_arrays and signature != u"ay":
519
raise ValueError(u"Byte arrays not supported for non-'ay'"
520
u" signature %r" % signature)
521
def decorator(func):
522
func._dbus_is_property = True
523
func._dbus_interface = dbus_interface
524
func._dbus_signature = signature
525
func._dbus_access = access
526
func._dbus_name = func.__name__
527
if func._dbus_name.endswith(u"_dbus_property"):
528
func._dbus_name = func._dbus_name[:-14]
529
func._dbus_get_args_options = {u'byte_arrays': byte_arrays }
530
return func
531
return decorator
532
533
534
class DBusPropertyException(dbus.exceptions.DBusException):
535
"""A base class for D-Bus property-related exceptions
536
"""
537
def __unicode__(self):
538
return unicode(str(self))
539
540
541
class DBusPropertyAccessException(DBusPropertyException):
542
"""A property's access permissions disallows an operation.
543
"""
544
pass
545
546
547
class DBusPropertyNotFound(DBusPropertyException):
548
"""An attempt was made to access a non-existing property.
549
"""
550
pass
551
552
553
class DBusObjectWithProperties(dbus.service.Object):
554
"""A D-Bus object with properties.
555
556
Classes inheriting from this can use the dbus_service_property
557
decorator to expose methods as D-Bus properties. It exposes the
558
standard Get(), Set(), and GetAll() methods on the D-Bus.
559
"""
560
561
@staticmethod
562
def _is_dbus_property(obj):
563
return getattr(obj, u"_dbus_is_property", False)
564
565
def _get_all_dbus_properties(self):
566
"""Returns a generator of (name, attribute) pairs
567
"""
568
return ((prop._dbus_name, prop)
569
for name, prop in
570
inspect.getmembers(self, self._is_dbus_property))
571
572
def _get_dbus_property(self, interface_name, property_name):
573
"""Returns a bound method if one exists which is a D-Bus
574
property with the specified name and interface.
575
"""
576
for name in (property_name,
577
property_name + u"_dbus_property"):
578
prop = getattr(self, name, None)
579
if (prop is None
580
or not self._is_dbus_property(prop)
581
or prop._dbus_name != property_name
582
or (interface_name and prop._dbus_interface
583
and interface_name != prop._dbus_interface)):
584
continue
585
return prop
586
# No such property
587
raise DBusPropertyNotFound(self.dbus_object_path + u":"
588
+ interface_name + u"."
589
+ property_name)
590
591
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ss",
592
out_signature=u"v")
593
def Get(self, interface_name, property_name):
594
"""Standard D-Bus property Get() method, see D-Bus standard.
595
"""
596
prop = self._get_dbus_property(interface_name, property_name)
597
if prop._dbus_access == u"write":
598
raise DBusPropertyAccessException(property_name)
599
value = prop()
600
if not hasattr(value, u"variant_level"):
601
return value
602
return type(value)(value, variant_level=value.variant_level+1)
603
604
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ssv")
605
def Set(self, interface_name, property_name, value):
606
"""Standard D-Bus property Set() method, see D-Bus standard.
607
"""
608
prop = self._get_dbus_property(interface_name, property_name)
609
if prop._dbus_access == u"read":
610
raise DBusPropertyAccessException(property_name)
611
if prop._dbus_get_args_options[u"byte_arrays"]:
612
# The byte_arrays option is not supported yet on
613
# signatures other than "ay".
614
if prop._dbus_signature != u"ay":
615
raise ValueError
616
value = dbus.ByteArray(''.join(unichr(byte)
617
for byte in value))
618
prop(value)
619
620
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"s",
621
out_signature=u"a{sv}")
622
def GetAll(self, interface_name):
623
"""Standard D-Bus property GetAll() method, see D-Bus
624
standard.
625
626
Note: Will not include properties with access="write".
627
"""
628
all = {}
629
for name, prop in self._get_all_dbus_properties():
630
if (interface_name
631
and interface_name != prop._dbus_interface):
632
# Interface non-empty but did not match
633
continue
634
# Ignore write-only properties
635
if prop._dbus_access == u"write":
636
continue
637
value = prop()
638
if not hasattr(value, u"variant_level"):
639
all[name] = value
640
continue
641
all[name] = type(value)(value, variant_level=
642
value.variant_level+1)
643
return dbus.Dictionary(all, signature=u"sv")
644
645
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
646
out_signature=u"s",
647
path_keyword='object_path',
648
connection_keyword='connection')
649
def Introspect(self, object_path, connection):
650
"""Standard D-Bus method, overloaded to insert property tags.
651
"""
652
xmlstring = dbus.service.Object.Introspect(self, object_path,
653
connection)
654
try:
655
document = xml.dom.minidom.parseString(xmlstring)
656
def make_tag(document, name, prop):
657
e = document.createElement(u"property")
658
e.setAttribute(u"name", name)
659
e.setAttribute(u"type", prop._dbus_signature)
660
e.setAttribute(u"access", prop._dbus_access)
661
return e
662
for if_tag in document.getElementsByTagName(u"interface"):
663
for tag in (make_tag(document, name, prop)
664
for name, prop
665
in self._get_all_dbus_properties()
666
if prop._dbus_interface
667
== if_tag.getAttribute(u"name")):
668
if_tag.appendChild(tag)
669
# Add the names to the return values for the
670
# "org.freedesktop.DBus.Properties" methods
671
if (if_tag.getAttribute(u"name")
672
== u"org.freedesktop.DBus.Properties"):
673
for cn in if_tag.getElementsByTagName(u"method"):
674
if cn.getAttribute(u"name") == u"Get":
675
for arg in cn.getElementsByTagName(u"arg"):
676
if (arg.getAttribute(u"direction")
677
== u"out"):
678
arg.setAttribute(u"name", u"value")
679
elif cn.getAttribute(u"name") == u"GetAll":
680
for arg in cn.getElementsByTagName(u"arg"):
681
if (arg.getAttribute(u"direction")
682
== u"out"):
683
arg.setAttribute(u"name", u"props")
684
xmlstring = document.toxml(u"utf-8")
685
document.unlink()
686
except (AttributeError, xml.dom.DOMException,
687
xml.parsers.expat.ExpatError), error:
688
logger.error(u"Failed to override Introspection method",
689
error)
690
return xmlstring
691
692
693
class ClientDBus(Client, DBusObjectWithProperties):
694
"""A Client class using D-Bus
695
696
Attributes:
697
dbus_object_path: dbus.ObjectPath
698
bus: dbus.SystemBus()
699
"""
700
# dbus.service.Object doesn't use super(), so we can't either.
701
702
def __init__(self, bus = None, *args, **kwargs):
703
self.bus = bus
704
Client.__init__(self, *args, **kwargs)
705
# Only now, when this client is initialized, can it show up on
706
# the D-Bus
707
self.dbus_object_path = (dbus.ObjectPath
708
(u"/clients/"
709
+ self.name.replace(u".", u"_")))
710
DBusObjectWithProperties.__init__(self, self.bus,
711
self.dbus_object_path)
712
713
@staticmethod
714
def _datetime_to_dbus(dt, variant_level=0):
715
"""Convert a UTC datetime.datetime() to a D-Bus type."""
716
return dbus.String(dt.isoformat(),
717
variant_level=variant_level)
718
719
def enable(self):
720
oldstate = getattr(self, u"enabled", False)
721
r = Client.enable(self)
722
if oldstate != self.enabled:
723
# Emit D-Bus signals
724
self.PropertyChanged(dbus.String(u"enabled"),
725
dbus.Boolean(True, variant_level=1))
726
self.PropertyChanged(
727
dbus.String(u"last_enabled"),
728
self._datetime_to_dbus(self.last_enabled,
729
variant_level=1))
730
return r
731
732
def disable(self, quiet = False):
733
oldstate = getattr(self, u"enabled", False)
734
r = Client.disable(self, quiet=quiet)
735
if not quiet and oldstate != self.enabled:
736
# Emit D-Bus signal
737
self.PropertyChanged(dbus.String(u"enabled"),
738
dbus.Boolean(False, variant_level=1))
739
return r
740
741
def __del__(self, *args, **kwargs):
742
try:
743
self.remove_from_connection()
744
except LookupError:
745
pass
746
if hasattr(DBusObjectWithProperties, u"__del__"):
747
DBusObjectWithProperties.__del__(self, *args, **kwargs)
748
Client.__del__(self, *args, **kwargs)
749
750
def checker_callback(self, pid, condition, command,
751
*args, **kwargs):
242
gobject.source_remove(self.checker_callback_tag)
752
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)
753
247
self.checker = None
754
# Emit D-Bus signal
755
self.PropertyChanged(dbus.String(u"checker_running"),
756
dbus.Boolean(False, variant_level=1))
757
if os.WIFEXITED(condition):
758
exitstatus = os.WEXITSTATUS(condition)
759
# Emit D-Bus signal
760
self.CheckerCompleted(dbus.Int16(exitstatus),
761
dbus.Int64(condition),
762
dbus.String(command))
763
else:
764
# Emit D-Bus signal
765
self.CheckerCompleted(dbus.Int16(-1),
766
dbus.Int64(condition),
767
dbus.String(command))
768
769
return Client.checker_callback(self, pid, condition, command,
770
*args, **kwargs)
771
772
def checked_ok(self, *args, **kwargs):
773
r = Client.checked_ok(self, *args, **kwargs)
774
# Emit D-Bus signal
775
self.PropertyChanged(
776
dbus.String(u"last_checked_ok"),
777
(self._datetime_to_dbus(self.last_checked_ok,
778
variant_level=1)))
779
return r
780
781
def start_checker(self, *args, **kwargs):
782
old_checker = self.checker
783
if self.checker is not None:
784
old_checker_pid = self.checker.pid
785
else:
786
old_checker_pid = None
787
r = Client.start_checker(self, *args, **kwargs)
788
# Only if new checker process was started
789
if (self.checker is not None
790
and old_checker_pid != self.checker.pid):
791
# Emit D-Bus signal
792
self.CheckerStarted(self.current_checker_command)
793
self.PropertyChanged(
794
dbus.String(u"checker_running"),
795
dbus.Boolean(True, variant_level=1))
796
return r
797
798
def stop_checker(self, *args, **kwargs):
799
old_checker = getattr(self, u"checker", None)
800
r = Client.stop_checker(self, *args, **kwargs)
801
if (old_checker is not None
802
and getattr(self, u"checker", None) is None):
803
self.PropertyChanged(dbus.String(u"checker_running"),
804
dbus.Boolean(False, variant_level=1))
805
return r
806
807
## D-Bus methods, signals & properties
808
_interface = u"se.bsnet.fukt.Mandos.Client"
809
810
## Signals
811
812
# CheckerCompleted - signal
813
@dbus.service.signal(_interface, signature=u"nxs")
814
def CheckerCompleted(self, exitcode, waitstatus, command):
815
"D-Bus signal"
816
pass
817
818
# CheckerStarted - signal
819
@dbus.service.signal(_interface, signature=u"s")
820
def CheckerStarted(self, command):
821
"D-Bus signal"
822
pass
823
824
# PropertyChanged - signal
825
@dbus.service.signal(_interface, signature=u"sv")
826
def PropertyChanged(self, property, value):
827
"D-Bus signal"
828
pass
829
830
# GotSecret - signal
831
@dbus.service.signal(_interface)
832
def GotSecret(self):
833
"D-Bus signal"
834
pass
835
836
# Rejected - signal
837
@dbus.service.signal(_interface)
838
def Rejected(self):
839
"D-Bus signal"
840
pass
841
842
## Methods
843
844
# CheckedOK - method
845
@dbus.service.method(_interface)
846
def CheckedOK(self):
847
return self.checked_ok()
848
849
# Enable - method
850
@dbus.service.method(_interface)
851
def Enable(self):
852
"D-Bus method"
853
self.enable()
854
855
# StartChecker - method
856
@dbus.service.method(_interface)
857
def StartChecker(self):
858
"D-Bus method"
859
self.start_checker()
860
861
# Disable - method
862
@dbus.service.method(_interface)
863
def Disable(self):
864
"D-Bus method"
865
self.disable()
866
867
# StopChecker - method
868
@dbus.service.method(_interface)
869
def StopChecker(self):
870
self.stop_checker()
871
872
## Properties
873
874
# name - property
875
@dbus_service_property(_interface, signature=u"s", access=u"read")
876
def name_dbus_property(self):
877
return dbus.String(self.name)
878
879
# fingerprint - property
880
@dbus_service_property(_interface, signature=u"s", access=u"read")
881
def fingerprint_dbus_property(self):
882
return dbus.String(self.fingerprint)
883
884
# host - property
885
@dbus_service_property(_interface, signature=u"s",
886
access=u"readwrite")
887
def host_dbus_property(self, value=None):
888
if value is None: # get
889
return dbus.String(self.host)
890
self.host = value
891
# Emit D-Bus signal
892
self.PropertyChanged(dbus.String(u"host"),
893
dbus.String(value, variant_level=1))
894
895
# created - property
896
@dbus_service_property(_interface, signature=u"s", access=u"read")
897
def created_dbus_property(self):
898
return dbus.String(self._datetime_to_dbus(self.created))
899
900
# last_enabled - property
901
@dbus_service_property(_interface, signature=u"s", access=u"read")
902
def last_enabled_dbus_property(self):
903
if self.last_enabled is None:
904
return dbus.String(u"")
905
return dbus.String(self._datetime_to_dbus(self.last_enabled))
906
907
# enabled - property
908
@dbus_service_property(_interface, signature=u"b",
909
access=u"readwrite")
910
def enabled_dbus_property(self, value=None):
911
if value is None: # get
912
return dbus.Boolean(self.enabled)
913
if value:
914
self.enable()
915
else:
916
self.disable()
917
918
# last_checked_ok - property
919
@dbus_service_property(_interface, signature=u"s",
920
access=u"readwrite")
921
def last_checked_ok_dbus_property(self, value=None):
922
if value is not None:
923
self.checked_ok()
924
return
925
if self.last_checked_ok is None:
926
return dbus.String(u"")
927
return dbus.String(self._datetime_to_dbus(self
928
.last_checked_ok))
929
930
# timeout - property
931
@dbus_service_property(_interface, signature=u"t",
932
access=u"readwrite")
933
def timeout_dbus_property(self, value=None):
934
if value is None: # get
935
return dbus.UInt64(self.timeout_milliseconds())
936
self.timeout = datetime.timedelta(0, 0, 0, value)
937
# Emit D-Bus signal
938
self.PropertyChanged(dbus.String(u"timeout"),
939
dbus.UInt64(value, variant_level=1))
940
if getattr(self, u"disable_initiator_tag", None) is None:
941
return
942
# Reschedule timeout
943
gobject.source_remove(self.disable_initiator_tag)
944
self.disable_initiator_tag = None
945
time_to_die = (self.
946
_timedelta_to_milliseconds((self
947
.last_checked_ok
948
+ self.timeout)
949
- datetime.datetime
950
.utcnow()))
951
if time_to_die <= 0:
952
# The timeout has passed
953
self.disable()
954
else:
955
self.disable_initiator_tag = (gobject.timeout_add
956
(time_to_die, self.disable))
957
958
# interval - property
959
@dbus_service_property(_interface, signature=u"t",
960
access=u"readwrite")
961
def interval_dbus_property(self, value=None):
962
if value is None: # get
963
return dbus.UInt64(self.interval_milliseconds())
964
self.interval = datetime.timedelta(0, 0, 0, value)
965
# Emit D-Bus signal
966
self.PropertyChanged(dbus.String(u"interval"),
967
dbus.UInt64(value, variant_level=1))
968
if getattr(self, u"checker_initiator_tag", None) is None:
969
return
970
# Reschedule checker run
971
gobject.source_remove(self.checker_initiator_tag)
972
self.checker_initiator_tag = (gobject.timeout_add
973
(value, self.start_checker))
974
self.start_checker() # Start one now, too
975
976
# checker - property
977
@dbus_service_property(_interface, signature=u"s",
978
access=u"readwrite")
979
def checker_dbus_property(self, value=None):
980
if value is None: # get
981
return dbus.String(self.checker_command)
982
self.checker_command = value
983
# Emit D-Bus signal
984
self.PropertyChanged(dbus.String(u"checker"),
985
dbus.String(self.checker_command,
986
variant_level=1))
987
988
# checker_running - property
989
@dbus_service_property(_interface, signature=u"b",
990
access=u"readwrite")
991
def checker_running_dbus_property(self, value=None):
992
if value is None: # get
993
return dbus.Boolean(self.checker is not None)
994
if value:
995
self.start_checker()
996
else:
997
self.stop_checker()
998
999
# object_path - property
1000
@dbus_service_property(_interface, signature=u"o", access=u"read")
1001
def object_path_dbus_property(self):
1002
return self.dbus_object_path # is already a dbus.ObjectPath
1003
1004
# secret = property
1005
@dbus_service_property(_interface, signature=u"ay",
1006
access=u"write", byte_arrays=True)
1007
def secret_dbus_property(self, value):
1008
self.secret = str(value)
1009
1010
del _interface
1011
1012
1013
class ClientHandler(socketserver.BaseRequestHandler, object):
1014
"""A class to handle client connections.
1015
1016
Instantiated once for each connection to handle it.
248
def still_valid(self, now=None):
249
"""Has the timeout not yet passed for this client?"""
250
if now is None:
251
now = datetime.datetime.now()
252
if self.last_seen is None:
253
return now < (self.created + self.timeout)
254
else:
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.
1017
307
Note: This will run in its own forked process."""
1018
308
1019
309
def handle(self):
1020
logger.info(u"TCP connection from: %s",
1021
unicode(self.client_address))
1022
logger.debug(u"IPC Pipe FD: %d",
1023
self.server.child_pipe[1].fileno())
1024
# Open IPC pipe to parent process
1025
with contextlib.nested(self.server.child_pipe[1],
1026
self.server.parent_pipe[0]
1027
) as (ipc, ipc_return):
1028
session = (gnutls.connection
1029
.ClientSession(self.request,
1030
gnutls.connection
1031
.X509Credentials()))
1032
1033
line = self.request.makefile().readline()
1034
logger.debug(u"Protocol version: %r", line)
1035
try:
1036
if int(line.strip().split()[0]) > 1:
1037
raise RuntimeError
1038
except (ValueError, IndexError, RuntimeError), error:
1039
logger.error(u"Unknown protocol version: %s", error)
1040
return
1041
1042
# Note: gnutls.connection.X509Credentials is really a
1043
# generic GnuTLS certificate credentials object so long as
1044
# no X.509 keys are added to it. Therefore, we can use it
1045
# here despite using OpenPGP certificates.
1046
1047
#priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
1048
# u"+AES-256-CBC", u"+SHA1",
1049
# u"+COMP-NULL", u"+CTYPE-OPENPGP",
1050
# u"+DHE-DSS"))
1051
# Use a fallback default, since this MUST be set.
1052
priority = self.server.gnutls_priority
1053
if priority is None:
1054
priority = u"NORMAL"
1055
(gnutls.library.functions
1056
.gnutls_priority_set_direct(session._c_object,
1057
priority, None))
1058
1059
try:
1060
session.handshake()
1061
except gnutls.errors.GNUTLSError, error:
1062
logger.warning(u"Handshake failed: %s", error)
1063
# Do not run session.bye() here: the session is not
1064
# established. Just abandon the request.
1065
return
1066
logger.debug(u"Handshake succeeded")
1067
try:
1068
try:
1069
fpr = self.fingerprint(self.peer_certificate
1070
(session))
1071
except (TypeError, gnutls.errors.GNUTLSError), error:
1072
logger.warning(u"Bad certificate: %s", error)
1073
return
1074
logger.debug(u"Fingerprint: %s", fpr)
1075
1076
for c in self.server.clients:
1077
if c.fingerprint == fpr:
1078
client = c
1079
break
1080
else:
1081
ipc.write(u"NOTFOUND %s %s\n"
1082
% (fpr, unicode(self.client_address)))
1083
return
1084
1085
class proxyclient(object):
1086
def __getattribute__(self, name):
1087
ipc.write(u"GETATTR %s %s\n" % name, client.fpr)
1088
return pickle.load(ipc_reply)
1089
p = proxyclient(client)
1090
1091
while True:
1092
if not p.client.enabled:
1093
icp.write("DISABLED %s\n" % client.fpr)
1094
return
1095
if p.client.approved == False:
1096
icp.write("Disaproved")
1097
return
1098
1099
if not p.client.secret:
1100
icp.write("No password")
1101
elif not p.client.approved:
1102
icp.write("Need approval"):
1103
else:
1104
#We have a password and are approved
1105
break
1106
i, o, e = select(p.changesignal, (), (), client.delay)
1107
if not i:
1108
icp.write("Timeout passed")
1109
return
1110
1111
ipc.write(u"SENDING %s\n" % client.name)
1112
sent_size = 0
1113
while sent_size < len(client.secret):
1114
sent = session.send(client.secret[sent_size:])
1115
logger.debug(u"Sent: %d, remaining: %d",
1116
sent, len(client.secret)
1117
- (sent_size + sent))
1118
sent_size += sent
1119
finally:
1120
session.bye()
1121
1122
@staticmethod
1123
def peer_certificate(session):
1124
"Return the peer's OpenPGP certificate as a bytestring"
1125
# If not an OpenPGP certificate...
1126
if (gnutls.library.functions
1127
.gnutls_certificate_type_get(session._c_object)
1128
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1129
# ...do the normal thing
1130
return session.peer_certificate
1131
list_size = ctypes.c_uint(1)
1132
cert_list = (gnutls.library.functions
1133
.gnutls_certificate_get_peers
1134
(session._c_object, ctypes.byref(list_size)))
1135
if not bool(cert_list) and list_size.value != 0:
1136
raise gnutls.errors.GNUTLSError(u"error getting peer"
1137
u" certificate")
1138
if list_size.value == 0:
1139
return None
1140
cert = cert_list[0]
1141
return ctypes.string_at(cert.data, cert.size)
1142
1143
@staticmethod
1144
def fingerprint(openpgp):
1145
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1146
# New GnuTLS "datum" with the OpenPGP public key
1147
datum = (gnutls.library.types
1148
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1149
ctypes.POINTER
1150
(ctypes.c_ubyte)),
1151
ctypes.c_uint(len(openpgp))))
1152
# New empty GnuTLS certificate
1153
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1154
(gnutls.library.functions
1155
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1156
# Import the OpenPGP public key into the certificate
1157
(gnutls.library.functions
1158
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1159
gnutls.library.constants
1160
.GNUTLS_OPENPGP_FMT_RAW))
1161
# Verify the self signature in the key
1162
crtverify = ctypes.c_uint()
1163
(gnutls.library.functions
1164
.gnutls_openpgp_crt_verify_self(crt, 0,
1165
ctypes.byref(crtverify)))
1166
if crtverify.value != 0:
1167
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1168
raise (gnutls.errors.CertificateSecurityError
1169
(u"Verify failed"))
1170
# New buffer for the fingerprint
1171
buf = ctypes.create_string_buffer(20)
1172
buf_len = ctypes.c_size_t()
1173
# Get the fingerprint from the certificate into the buffer
1174
(gnutls.library.functions
1175
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1176
ctypes.byref(buf_len)))
1177
# Deinit the certificate
1178
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1179
# Convert the buffer to a Python bytestring
1180
fpr = ctypes.string_at(buf, buf_len.value)
1181
# Convert the bytestring to hexadecimal notation
1182
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
1183
return hex_fpr
1184
1185
1186
class ForkingMixInWithPipes(socketserver.ForkingMixIn, object):
1187
"""Like socketserver.ForkingMixIn, but also pass a pipe pair."""
1188
def process_request(self, request, client_address):
1189
"""Overrides and wraps the original process_request().
1190
1191
This function creates a new pipe in self.pipe
1192
"""
1193
# Child writes to child_pipe
1194
self.child_pipe = map(os.fdopen, os.pipe(), u"rw", (1, 0))
1195
# Parent writes to parent_pipe
1196
self.parent_pipe = map(os.fdopen, os.pipe(), u"rw", (1, 0))
1197
super(ForkingMixInWithPipes,
1198
self).process_request(request, client_address)
1199
# Close unused ends for parent
1200
self.parent_pipe[0].close() # close read end
1201
self.child_pipe[1].close() # close write end
1202
self.add_pipe_fds(self.child_pipe[0], self.parent_pipe[1])
1203
def add_pipe_fds(self, child_pipe_fd, parent_pipe_fd):
1204
"""Dummy function; override as necessary"""
1205
child_pipe_fd.close()
1206
parent_pipe_fd.close()
1207
1208
1209
class IPv6_TCPServer(ForkingMixInWithPipes,
1210
socketserver.TCPServer, object):
1211
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1212
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))
350
else:
351
logger.debug(u"Client not found for fingerprint: %s",
352
fpr)
353
session.bye()
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.
1213
367
Attributes:
1214
enabled: Boolean; whether this server is activated yet
1215
interface: None or a network interface name (string)
1216
use_ipv6: Boolean; to use IPv6 or not
368
options: Command line options
369
clients: Set() of Client objects
1217
370
"""
1218
def __init__(self, server_address, RequestHandlerClass,
1219
interface=None, use_ipv6=True):
1220
self.interface = interface
1221
if use_ipv6:
1222
self.address_family = socket.AF_INET6
1223
socketserver.TCPServer.__init__(self, server_address,
1224
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)
1225
380
def server_bind(self):
1226
381
"""This overrides the normal server_bind() function
1227
382
to bind to an interface if one was specified, and also NOT to
1228
383
bind to an address or port if they were not specified."""
1229
if self.interface is not None:
1230
if SO_BINDTODEVICE is None:
1231
logger.error(u"SO_BINDTODEVICE does not exist;"
1232
u" cannot bind to interface %s",
1233
self.interface)
1234
else:
1235
try:
1236
self.socket.setsockopt(socket.SOL_SOCKET,
1237
SO_BINDTODEVICE,
1238
str(self.interface
1239
+ u'\0'))
1240
except socket.error, error:
1241
if error[0] == errno.EPERM:
1242
logger.error(u"No permission to"
1243
u" bind to interface %s",
1244
self.interface)
1245
elif error[0] == errno.ENOPROTOOPT:
1246
logger.error(u"SO_BINDTODEVICE not available;"
1247
u" cannot bind to interface %s",
1248
self.interface)
1249
else:
1250
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
1251
399
# Only bind(2) the socket if we really need to.
1252
400
if self.server_address[0] or self.server_address[1]:
1253
401
if not self.server_address[0]:
1254
if self.address_family == socket.AF_INET6:
1255
any_address = u"::" # in6addr_any
1256
else:
1257
any_address = socket.INADDR_ANY
1258
self.server_address = (any_address,
402
in6addr_any = "::"
403
self.server_address = (in6addr_any,
1259
404
self.server_address[1])
1260
elif not self.server_address[1]:
405
elif self.server_address[1] is None:
1261
406
self.server_address = (self.server_address[0],
1262
407
0)
1263
# if self.interface:
1264
# self.server_address = (self.server_address[0],
1265
# 0, # port
1266
# 0, # flowinfo
1267
# if_nametoindex
1268
# (self.interface))
1269
return socketserver.TCPServer.server_bind(self)
1270
1271
1272
class MandosServer(IPv6_TCPServer):
1273
"""Mandos server.
1274
1275
Attributes:
1276
clients: set of Client objects
1277
gnutls_priority GnuTLS priority string
1278
use_dbus: Boolean; to emit D-Bus signals or not
1279
1280
Assumes a gobject.MainLoop event loop.
1281
"""
1282
def __init__(self, server_address, RequestHandlerClass,
1283
interface=None, use_ipv6=True, clients=None,
1284
gnutls_priority=None, use_dbus=True):
1285
self.enabled = False
1286
self.clients = clients
1287
if self.clients is None:
1288
self.clients = set()
1289
self.use_dbus = use_dbus
1290
self.gnutls_priority = gnutls_priority
1291
IPv6_TCPServer.__init__(self, server_address,
1292
RequestHandlerClass,
1293
interface = interface,
1294
use_ipv6 = use_ipv6)
1295
def server_activate(self):
1296
if self.enabled:
1297
return socketserver.TCPServer.server_activate(self)
1298
def enable(self):
1299
self.enabled = True
1300
def add_pipe_fds(self, child_pipe_fd, parent_pipe_fd):
1301
# Call "handle_ipc" for both data and EOF events
1302
gobject.io_add_watch(child_pipe_fd.fileno(),
1303
gobject.IO_IN | gobject.IO_HUP,
1304
functools.partial(self.handle_ipc,
1305
reply = parent_pipe_fd,
1306
sender= child_pipe_fd))
1307
def handle_ipc(self, source, condition, reply=None, sender=None):
1308
condition_names = {
1309
gobject.IO_IN: u"IN", # There is data to read.
1310
gobject.IO_OUT: u"OUT", # Data can be written (without
1311
# blocking).
1312
gobject.IO_PRI: u"PRI", # There is urgent data to read.
1313
gobject.IO_ERR: u"ERR", # Error condition.
1314
gobject.IO_HUP: u"HUP" # Hung up (the connection has been
1315
# broken, usually for pipes and
1316
# sockets).
1317
}
1318
conditions_string = ' | '.join(name
1319
for cond, name in
1320
condition_names.iteritems()
1321
if cond & condition)
1322
logger.debug(u"Handling IPC: FD = %d, condition = %s", source,
1323
conditions_string)
1324
1325
# Read a line from the file object
1326
cmdline = sender.readline()
1327
if not cmdline: # Empty line means end of file
1328
# close the IPC pipes
1329
sender.close()
1330
reply.close()
1331
1332
# Stop calling this function
1333
return False
1334
1335
logger.debug(u"IPC command: %r", cmdline)
1336
1337
# Parse and act on command
1338
cmd, args = cmdline.rstrip(u"\r\n").split(None, 1)
1339
1340
if cmd == u"NOTFOUND":
1341
fpr, address = args.split(None, 1)
1342
logger.warning(u"Client not found for fingerprint: %s, ad"
1343
u"dress: %s", fpr, address)
1344
if self.use_dbus:
1345
# Emit D-Bus signal
1346
mandos_dbus_service.ClientNotFound(fpr, address)
1347
elif cmd == u"DISABLED":
1348
for client in self.clients:
1349
if client.name == args:
1350
logger.warning(u"Client %s is disabled", args)
1351
if self.use_dbus:
1352
# Emit D-Bus signal
1353
client.Rejected()
1354
break
1355
else:
1356
logger.error(u"Unknown client %s is disabled", args)
1357
elif cmd == u"SENDING":
1358
for client in self.clients:
1359
if client.name == args:
1360
logger.info(u"Sending secret to %s", client.name)
1361
client.checked_ok()
1362
if self.use_dbus:
1363
# Emit D-Bus signal
1364
client.GotSecret()
1365
break
1366
else:
1367
logger.error(u"Sending secret to unknown client %s",
1368
args)
1369
elif cmd == u"GETATTR":
1370
attr_name, fpr = args.split(None, 1)
1371
for client in self.clients:
1372
if client.fingerprint == fpr:
1373
attr_value = getattr(client, attr_name, None)
1374
logger.debug("IPC reply: %r", attr_value)
1375
pickle.dump(attr_value, reply)
1376
break
1377
else:
1378
logger.error(u"Client %s on address %s requesting "
1379
u"attribute %s not found", fpr, address,
1380
attr_name)
1381
pickle.dump(None, reply)
1382
else:
1383
logger.error(u"Unknown IPC command: %r", cmdline)
1384
1385
# Keep calling this function
1386
return True
408
return super(type(self), self).server_bind()
1387
409
1388
410
1389
411
def string_to_delta(interval):
1390
412
"""Parse a string and return a datetime.timedelta
1391
1392
>>> string_to_delta(u'7d')
413
414
>>> string_to_delta('7d')
1393
415
datetime.timedelta(7)
1394
>>> string_to_delta(u'60s')
416
>>> string_to_delta('60s')
1395
417
datetime.timedelta(0, 60)
1396
>>> string_to_delta(u'60m')
418
>>> string_to_delta('60m')
1397
419
datetime.timedelta(0, 3600)
1398
>>> string_to_delta(u'24h')
420
>>> string_to_delta('24h')
1399
421
datetime.timedelta(1)
1400
422
>>> string_to_delta(u'1w')
1401
423
datetime.timedelta(7)
1402
>>> string_to_delta(u'5m 30s')
1403
datetime.timedelta(0, 330)
1404
424
"""
1405
timevalue = datetime.timedelta(0)
1406
for s in interval.split():
1407
try:
1408
suffix = unicode(s[-1])
1409
value = int(s[:-1])
1410
if suffix == u"d":
1411
delta = datetime.timedelta(value)
1412
elif suffix == u"s":
1413
delta = datetime.timedelta(0, value)
1414
elif suffix == u"m":
1415
delta = datetime.timedelta(0, 0, 0, 0, value)
1416
elif suffix == u"h":
1417
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
1418
elif suffix == u"w":
1419
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1420
else:
1421
raise ValueError(u"Unknown suffix %r" % suffix)
1422
except (ValueError, IndexError), e:
1423
raise ValueError(e.message)
1424
timevalue += delta
1425
return timevalue
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:
439
raise ValueError
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
1426
515
1427
516
1428
517
def if_nametoindex(interface):
1429
"""Call the C function if_nametoindex(), or equivalent
1430
1431
Note: This function cannot accept a unicode string."""
1432
global if_nametoindex
518
"""Call the C function if_nametoindex()"""
1433
519
try:
1434
if_nametoindex = (ctypes.cdll.LoadLibrary
1435
(ctypes.util.find_library(u"c"))
1436
.if_nametoindex)
520
libc = ctypes.cdll.LoadLibrary("libc.so.6")
521
return libc.if_nametoindex(interface)
1437
522
except (OSError, AttributeError):
1438
logger.warning(u"Doing if_nametoindex the hard way")
1439
def if_nametoindex(interface):
1440
"Get an interface index the hard way, i.e. using fcntl()"
1441
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1442
with contextlib.closing(socket.socket()) as s:
1443
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1444
struct.pack(str(u"16s16x"),
1445
interface))
1446
interface_index = struct.unpack(str(u"I"),
1447
ifreq[16:20])[0]
1448
return interface_index
1449
return if_nametoindex(interface)
1450
1451
1452
def daemon(nochdir = False, noclose = False):
1453
"""See daemon(3). Standard BSD Unix function.
1454
1455
This should really exist as os.daemon, but it doesn't (yet)."""
1456
if os.fork():
1457
sys.exit()
1458
os.setsid()
1459
if not nochdir:
1460
os.chdir(u"/")
1461
if os.fork():
1462
sys.exit()
1463
if not noclose:
1464
# Close all standard open file descriptors
1465
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1466
if not stat.S_ISCHR(os.fstat(null).st_mode):
1467
raise OSError(errno.ENODEV,
1468
u"%s not a character device"
1469
% os.path.devnull)
1470
os.dup2(null, sys.stdin.fileno())
1471
os.dup2(null, sys.stdout.fileno())
1472
os.dup2(null, sys.stderr.fileno())
1473
if null > 2:
1474
os.close(null)
1475
1476
1477
def main():
1478
1479
##################################################################
1480
# Parsing of options, both command line and config file
1481
1482
parser = optparse.OptionParser(version = "%%prog %s" % version)
1483
parser.add_option("-i", u"--interface", type=u"string",
1484
metavar="IF", help=u"Bind to interface IF")
1485
parser.add_option("-a", u"--address", type=u"string",
1486
help=u"Address to listen for requests on")
1487
parser.add_option("-p", u"--port", type=u"int",
1488
help=u"Port number to receive requests on")
1489
parser.add_option("--check", action=u"store_true",
1490
help=u"Run self-test")
1491
parser.add_option("--debug", action=u"store_true",
1492
help=u"Debug mode; run in foreground and log to"
1493
u" terminal")
1494
parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1495
u" priority string (see GnuTLS documentation)")
1496
parser.add_option("--servicename", type=u"string",
1497
metavar=u"NAME", help=u"Zeroconf service name")
1498
parser.add_option("--configdir", type=u"string",
1499
default=u"/etc/mandos", metavar=u"DIR",
1500
help=u"Directory to search for configuration"
1501
u" files")
1502
parser.add_option("--no-dbus", action=u"store_false",
1503
dest=u"use_dbus", help=u"Do not provide D-Bus"
1504
u" system bus interface")
1505
parser.add_option("--no-ipv6", action=u"store_false",
1506
dest=u"use_ipv6", help=u"Do not use IPv6")
1507
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()
1508
566
1509
567
if options.check:
1510
568
import doctest
1511
569
doctest.testmod()
1512
570
sys.exit()
1513
571
1514
# Default values for config file for server-global settings
1515
server_defaults = { u"interface": u"",
1516
u"address": u"",
1517
u"port": u"",
1518
u"debug": u"False",
1519
u"priority":
1520
u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1521
u"servicename": u"Mandos",
1522
u"use_dbus": u"True",
1523
u"use_ipv6": u"True",
1524
}
1525
1526
# Parse config file for server-global settings
1527
server_config = configparser.SafeConfigParser(server_defaults)
1528
del server_defaults
1529
server_config.read(os.path.join(options.configdir,
1530
u"mandos.conf"))
1531
# Convert the SafeConfigParser object to a dict
1532
server_settings = server_config.defaults()
1533
# Use the appropriate methods on the non-string config options
1534
for option in (u"debug", u"use_dbus", u"use_ipv6"):
1535
server_settings[option] = server_config.getboolean(u"DEFAULT",
1536
option)
1537
if server_settings["port"]:
1538
server_settings["port"] = server_config.getint(u"DEFAULT",
1539
u"port")
1540
del server_config
1541
1542
# Override the settings from the config file with command line
1543
# options, if set.
1544
for option in (u"interface", u"address", u"port", u"debug",
1545
u"priority", u"servicename", u"configdir",
1546
u"use_dbus", u"use_ipv6"):
1547
value = getattr(options, option)
1548
if value is not None:
1549
server_settings[option] = value
1550
del options
1551
# Force all strings to be unicode
1552
for option in server_settings.keys():
1553
if type(server_settings[option]) is str:
1554
server_settings[option] = unicode(server_settings[option])
1555
# Now we have our good server settings in "server_settings"
1556
1557
##################################################################
1558
1559
# For convenience
1560
debug = server_settings[u"debug"]
1561
use_dbus = server_settings[u"use_dbus"]
1562
use_ipv6 = server_settings[u"use_ipv6"]
1563
1564
if not debug:
1565
syslogger.setLevel(logging.WARNING)
1566
console.setLevel(logging.WARNING)
1567
1568
if server_settings[u"servicename"] != u"Mandos":
1569
syslogger.setFormatter(logging.Formatter
1570
(u'Mandos (%s) [%%(process)d]:'
1571
u' %%(levelname)s: %%(message)s'
1572
% server_settings[u"servicename"]))
1573
1574
# Parse config file with clients
1575
client_defaults = { u"timeout": u"1h",
1576
u"interval": u"5m",
1577
u"checker": u"fping -q -- %%(host)s",
1578
u"host": u"",
1579
}
1580
client_config = configparser.SafeConfigParser(client_defaults)
1581
client_config.read(os.path.join(server_settings[u"configdir"],
1582
u"clients.conf"))
1583
1584
global mandos_dbus_service
1585
mandos_dbus_service = None
1586
1587
tcp_server = MandosServer((server_settings[u"address"],
1588
server_settings[u"port"]),
1589
ClientHandler,
1590
interface=server_settings[u"interface"],
1591
use_ipv6=use_ipv6,
1592
gnutls_priority=
1593
server_settings[u"priority"],
1594
use_dbus=use_dbus)
1595
pidfilename = u"/var/run/mandos.pid"
1596
try:
1597
pidfile = open(pidfilename, u"w")
1598
except IOError:
1599
logger.error(u"Could not open file %r", pidfilename)
1600
1601
try:
1602
uid = pwd.getpwnam(u"_mandos").pw_uid
1603
gid = pwd.getpwnam(u"_mandos").pw_gid
1604
except KeyError:
1605
try:
1606
uid = pwd.getpwnam(u"mandos").pw_uid
1607
gid = pwd.getpwnam(u"mandos").pw_gid
1608
except KeyError:
1609
try:
1610
uid = pwd.getpwnam(u"nobody").pw_uid
1611
gid = pwd.getpwnam(u"nobody").pw_gid
1612
except KeyError:
1613
uid = 65534
1614
gid = 65534
1615
try:
1616
os.setgid(gid)
1617
os.setuid(uid)
1618
except OSError, error:
1619
if error[0] != errno.EPERM:
1620
raise error
1621
1622
# Enable all possible GnuTLS debugging
1623
if debug:
1624
# "Use a log level over 10 to enable all debugging options."
1625
# - GnuTLS manual
1626
gnutls.library.functions.gnutls_global_set_log_level(11)
1627
1628
@gnutls.library.types.gnutls_log_func
1629
def debug_gnutls(level, string):
1630
logger.debug(u"GnuTLS: %s", string[:-1])
1631
1632
(gnutls.library.functions
1633
.gnutls_global_set_log_function(debug_gnutls))
1634
1635
global main_loop
1636
# 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
1637
589
DBusGMainLoop(set_as_default=True )
1638
590
main_loop = gobject.MainLoop()
1639
591
bus = dbus.SystemBus()
1640
# End of Avahi example code
1641
if use_dbus:
1642
try:
1643
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos",
1644
bus, do_not_queue=True)
1645
except dbus.exceptions.NameExistsException, e:
1646
logger.error(unicode(e) + u", disabling D-Bus")
1647
use_dbus = False
1648
server_settings[u"use_dbus"] = False
1649
tcp_server.use_dbus = False
1650
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1651
service = AvahiService(name = server_settings[u"servicename"],
1652
servicetype = u"_mandos._tcp",
1653
protocol = protocol, bus = bus)
1654
if server_settings["interface"]:
1655
service.interface = (if_nametoindex
1656
(str(server_settings[u"interface"])))
1657
1658
client_class = Client
1659
if use_dbus:
1660
client_class = functools.partial(ClientDBus, bus = bus)
1661
tcp_server.clients.update(set(
1662
client_class(name = section,
1663
config= dict(client_config.items(section)))
1664
for section in client_config.sections()))
1665
if not tcp_server.clients:
1666
logger.warning(u"No clients defined")
1667
1668
if debug:
1669
# Redirect stdin so all checkers get /dev/null
1670
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1671
os.dup2(null, sys.stdin.fileno())
1672
if null > 2:
1673
os.close(null)
1674
else:
1675
# No console logging
1676
logger.removeHandler(console)
1677
# Close all input and output, do double fork, etc.
1678
daemon()
1679
1680
try:
1681
with pidfile:
1682
pid = os.getpid()
1683
pidfile.write(str(pid) + "\n")
1684
del pidfile
1685
except IOError:
1686
logger.error(u"Could not write to file %r with PID %d",
1687
pidfilename, pid)
1688
except NameError:
1689
# "pidfile" was never created
1690
pass
1691
del pidfilename
1692
1693
if not debug:
1694
signal.signal(signal.SIGINT, signal.SIG_IGN)
1695
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1696
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1697
1698
if use_dbus:
1699
class MandosDBusService(dbus.service.Object):
1700
"""A D-Bus proxy object"""
1701
def __init__(self):
1702
dbus.service.Object.__init__(self, bus, u"/")
1703
_interface = u"se.bsnet.fukt.Mandos"
1704
1705
@dbus.service.signal(_interface, signature=u"o")
1706
def ClientAdded(self, objpath):
1707
"D-Bus signal"
1708
pass
1709
1710
@dbus.service.signal(_interface, signature=u"ss")
1711
def ClientNotFound(self, fingerprint, address):
1712
"D-Bus signal"
1713
pass
1714
1715
@dbus.service.signal(_interface, signature=u"os")
1716
def ClientRemoved(self, objpath, name):
1717
"D-Bus signal"
1718
pass
1719
1720
@dbus.service.method(_interface, out_signature=u"ao")
1721
def GetAllClients(self):
1722
"D-Bus method"
1723
return dbus.Array(c.dbus_object_path
1724
for c in tcp_server.clients)
1725
1726
@dbus.service.method(_interface,
1727
out_signature=u"a{oa{sv}}")
1728
def GetAllClientsWithProperties(self):
1729
"D-Bus method"
1730
return dbus.Dictionary(
1731
((c.dbus_object_path, c.GetAll(u""))
1732
for c in tcp_server.clients),
1733
signature=u"oa{sv}")
1734
1735
@dbus.service.method(_interface, in_signature=u"o")
1736
def RemoveClient(self, object_path):
1737
"D-Bus method"
1738
for c in tcp_server.clients:
1739
if c.dbus_object_path == object_path:
1740
tcp_server.clients.remove(c)
1741
c.remove_from_connection()
1742
# Don't signal anything except ClientRemoved
1743
c.disable(quiet=True)
1744
# Emit D-Bus signal
1745
self.ClientRemoved(object_path, c.name)
1746
return
1747
raise KeyError(object_path)
1748
1749
del _interface
1750
1751
mandos_dbus_service = MandosDBusService()
1752
1753
def cleanup():
1754
"Cleanup function; run on exit"
1755
service.cleanup()
1756
1757
while tcp_server.clients:
1758
client = tcp_server.clients.pop()
1759
if use_dbus:
1760
client.remove_from_connection()
1761
client.disable_hook = None
1762
# Don't signal anything except ClientRemoved
1763
client.disable(quiet=True)
1764
if use_dbus:
1765
# Emit D-Bus signal
1766
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
1767
client.name)
1768
1769
atexit.register(cleanup)
1770
1771
for client in tcp_server.clients:
1772
if use_dbus:
1773
# Emit D-Bus signal
1774
mandos_dbus_service.ClientAdded(client.dbus_object_path)
1775
client.enable()
1776
1777
tcp_server.enable()
1778
tcp_server.server_activate()
1779
1780
# Find out what port we got
1781
service.port = tcp_server.socket.getsockname()[1]
1782
if use_ipv6:
1783
logger.info(u"Now listening on address %r, port %d,"
1784
" flowinfo %d, scope_id %d"
1785
% tcp_server.socket.getsockname())
1786
else: # IPv4
1787
logger.info(u"Now listening on address %r, port %d"
1788
% tcp_server.socket.getsockname())
1789
1790
#service.interface = tcp_server.socket.getsockname()[3]
1791
1792
try:
1793
# From the Avahi example code
1794
try:
1795
service.activate()
1796
except dbus.exceptions.DBusException, error:
1797
logger.critical(u"DBusException: %s", error)
1798
cleanup()
1799
sys.exit(1)
1800
# End of Avahi example code
1801
1802
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
1803
lambda *args, **kwargs:
1804
(tcp_server.handle_request
1805
(*args[2:], **kwargs) or True))
1806
1807
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:
1808
635
main_loop.run()
1809
except AvahiError, error:
1810
logger.critical(u"AvahiError: %s", error)
1811
cleanup()
1812
sys.exit(1)
1813
636
except KeyboardInterrupt:
1814
if debug:
1815
print >> sys.stderr
1816
logger.debug(u"Server received KeyboardInterrupt")
1817
logger.debug(u"Server exiting")
1818
# Must run before the D-Bus bus name gets deregistered
1819
cleanup()
637
print
638
639
# Cleanup here
1820
640
1821
if __name__ == '__main__':
1822
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