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- Committer: Teddy Hogeborn
- Date: 2008-07-21 01:52:54 UTC
- mfrom: (15.1.2 mandos)
- Revision ID: teddy@fukt.bsnet.se-20080721015254-5ut0m7j1r4t5x7hj
Merge.
- 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
6
6
# This program is partly derived from an example program for an Avahi
7
7
# service publisher, downloaded from
8
8
# <http://avahi.org/wiki/PythonPublishExample>. This includes the
9
# methods "add", "remove", "server_state_changed",
10
# "entry_group_state_changed", "cleanup", and "activate" in the
11
# "AvahiService" class, and some lines in "main".
9
# following functions: "add_service", "remove_service",
10
# "server_state_changed", "entry_group_state_changed", and some lines
11
# in "main".
12
12
#
13
# Everything else is
14
# Copyright © 2008,2009 Teddy Hogeborn
15
# Copyright © 2008,2009 Björn Påhlsson
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# Everything else is Copyright © 2007-2008 Teddy Hogeborn and Björn
14
# Påhlsson.
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15
#
17
16
# This program is free software: you can redistribute it and/or modify
18
17
# it under the terms of the GNU General Public License as published by
25
24
# GNU General Public License for more details.
26
25
#
27
26
# You should have received a copy of the GNU General Public License
28
# along with this program. If not, see
29
# <http://www.gnu.org/licenses/>.
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
27
# along with this program. If not, see <http://www.gnu.org/licenses/>.
28
#
29
# Contact the authors at <https://www.fukt.bsnet.se/~belorn/> and
30
# <https://www.fukt.bsnet.se/~teddy/>.
31
#
32
33
from __future__ import division
34
35
import SocketServer
37
36
import socket
38
import optparse
37
import select
38
from optparse import OptionParser
39
39
import datetime
40
40
import errno
41
41
import gnutls.crypto
44
44
import gnutls.library.functions
45
45
import gnutls.library.constants
46
46
import gnutls.library.types
47
import ConfigParser as configparser
47
import ConfigParser
48
48
import sys
49
49
import re
50
50
import os
51
51
import signal
52
from sets import Set
52
53
import subprocess
53
54
import atexit
54
55
import stat
55
56
import logging
56
57
import logging.handlers
57
import pwd
58
from contextlib import closing
59
import struct
60
import fcntl
61
import functools
62
58
63
59
import dbus
64
import dbus.service
65
60
import gobject
66
61
import avahi
67
62
from dbus.mainloop.glib import DBusGMainLoop
68
63
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'))
64
65
# Brief description of the operation of this program:
66
#
67
# This server announces itself as a Zeroconf service. Connecting
68
# clients use the TLS protocol, with the unusual quirk that this
69
# server program acts as a TLS "client" while the connecting clients
70
# acts as a TLS "server". The clients (acting as a TLS "server") must
71
# supply an OpenPGP certificate, and the fingerprint of this
72
# certificate is used by this server to look up (in a list read from a
73
# file at start time) which binary blob to give the client. No other
74
# authentication or authorization is done by this server.
75
76
77
logger = logging.Logger('mandos')
78
syslogger = logging.handlers.SysLogHandler\
79
(facility = logging.handlers.SysLogHandler.LOG_DAEMON)
80
syslogger.setFormatter(logging.Formatter\
81
('%(levelname)s: %(message)s'))
91
82
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())
83
del syslogger
84
85
# This variable is used to optionally bind to a specified interface.
86
# It is a global variable to fit in with the other variables from the
87
# Avahi example code.
88
serviceInterface = avahi.IF_UNSPEC
89
# From the Avahi example code:
90
serviceName = "Mandos"
91
serviceType = "_mandos._tcp" # http://www.dns-sd.org/ServiceTypes.html
92
servicePort = None # Not known at startup
93
serviceTXT = [] # TXT record for the service
94
domain = "" # Domain to publish on, default to .local
95
host = "" # Host to publish records for, default to localhost
96
group = None #our entry group
97
rename_count = 12 # Counter so we only rename after collisions a
98
# sensible number of times
99
# End of Avahi example code
228
100
229
101
230
102
class Client(object):
231
103
"""A representation of a client host served by this server.
232
233
104
Attributes:
234
name: string; from the config file, used in log messages and
235
D-Bus identifiers
105
name: string; from the config file, used in log messages
236
106
fingerprint: string (40 or 32 hexadecimal digits); used to
237
107
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.
108
secret: bytestring; sent verbatim (over TLS) to client
109
fqdn: string (FQDN); available for use by the checker command
110
created: datetime.datetime()
111
last_seen: datetime.datetime() or None if not yet seen
112
timeout: datetime.timedelta(); How long from last_seen until
113
this client is invalid
114
interval: datetime.timedelta(); How often to start a new checker
115
stop_hook: If set, called by stop() as stop_hook(self)
116
checker: subprocess.Popen(); a running checker process used
117
to see if the client lives.
118
Is None if no process is running.
251
119
checker_initiator_tag: a gobject event source tag, or None
252
disable_initiator_tag: - '' -
120
stop_initiator_tag: - '' -
253
121
checker_callback_tag: - '' -
254
122
checker_command: string; External command which is run to check if
255
client lives. %() expansions are done at
123
client lives. %()s expansions are done at
256
124
runtime with vars(self) as dict, so that for
257
125
instance %(name)s can be used in the command.
258
current_checker_command: string; current running checker_command
126
Private attibutes:
127
_timeout: Real variable for 'timeout'
128
_interval: Real variable for 'interval'
129
_timeout_milliseconds: Used by gobject.timeout_add()
130
_interval_milliseconds: - '' -
259
131
"""
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."""
132
def _set_timeout(self, timeout):
133
"Setter function for 'timeout' attribute"
134
self._timeout = timeout
135
self._timeout_milliseconds = ((self.timeout.days
136
* 24 * 60 * 60 * 1000)
137
+ (self.timeout.seconds * 1000)
138
+ (self.timeout.microseconds
139
// 1000))
140
timeout = property(lambda self: self._timeout,
141
_set_timeout)
142
del _set_timeout
143
def _set_interval(self, interval):
144
"Setter function for 'interval' attribute"
145
self._interval = interval
146
self._interval_milliseconds = ((self.interval.days
147
* 24 * 60 * 60 * 1000)
148
+ (self.interval.seconds
149
* 1000)
150
+ (self.interval.microseconds
151
// 1000))
152
interval = property(lambda self: self._interval,
153
_set_interval)
154
del _set_interval
155
def __init__(self, name=None, options=None, stop_hook=None,
156
fingerprint=None, secret=None, secfile=None,
157
fqdn=None, timeout=None, interval=-1, checker=None):
158
"""Note: the 'checker' argument sets the 'checker_command'
159
attribute and not the 'checker' attribute.."""
280
160
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"])))) as secfile:
296
self.secret = secfile.read()
297
else:
298
raise TypeError(u"No secret or secfile for client %s"
299
% self.name)
300
self.host = config.get(u"host", u"")
301
self.created = datetime.datetime.utcnow()
302
self.enabled = False
303
self.last_enabled = None
304
self.last_checked_ok = None
305
self.timeout = string_to_delta(config[u"timeout"])
306
self.interval = string_to_delta(config[u"interval"])
307
self.disable_hook = disable_hook
161
# Uppercase and remove spaces from fingerprint
162
# for later comparison purposes with return value of
163
# the fingerprint() function
164
self.fingerprint = fingerprint.upper().replace(u" ", u"")
165
if secret:
166
self.secret = secret.decode(u"base64")
167
elif secfile:
168
sf = open(secfile)
169
self.secret = sf.read()
170
sf.close()
171
else:
172
raise RuntimeError(u"No secret or secfile for client %s"
173
% self.name)
174
self.fqdn = fqdn # string
175
self.created = datetime.datetime.now()
176
self.last_seen = None
177
if timeout is None:
178
self.timeout = options.timeout
179
else:
180
self.timeout = string_to_delta(timeout)
181
if interval == -1:
182
self.interval = options.interval
183
else:
184
self.interval = string_to_delta(interval)
185
self.stop_hook = stop_hook
308
186
self.checker = None
309
187
self.checker_initiator_tag = None
310
self.disable_initiator_tag = None
188
self.stop_initiator_tag = None
311
189
self.checker_callback_tag = None
312
self.checker_command = config[u"checker"]
313
self.current_checker_command = None
314
self.last_connect = None
315
316
def enable(self):
190
self.check_command = checker
191
def start(self):
317
192
"""Start this client's checker and timeout hooks"""
318
if getattr(self, u"enabled", False):
319
# Already enabled
320
return
321
self.last_enabled = datetime.datetime.utcnow()
322
193
# Schedule a new checker to be started an 'interval' from now,
323
194
# and every interval from then on.
324
self.checker_initiator_tag = (gobject.timeout_add
325
(self.interval_milliseconds(),
326
self.start_checker))
195
self.checker_initiator_tag = gobject.timeout_add\
196
(self._interval_milliseconds,
197
self.start_checker)
327
198
# Also start a new checker *right now*.
328
199
self.start_checker()
329
# Schedule a disable() when 'timeout' has passed
330
self.disable_initiator_tag = (gobject.timeout_add
331
(self.timeout_milliseconds(),
332
self.disable))
333
self.enabled = True
334
335
def disable(self):
336
"""Disable this client."""
337
if not getattr(self, "enabled", False):
200
# Schedule a stop() when 'timeout' has passed
201
self.stop_initiator_tag = gobject.timeout_add\
202
(self._timeout_milliseconds,
203
self.stop)
204
def stop(self):
205
"""Stop this client.
206
The possibility that this client might be restarted is left
207
open, but not currently used."""
208
# If this client doesn't have a secret, it is already stopped.
209
if self.secret:
210
logger.debug(u"Stopping client %s", self.name)
211
self.secret = None
212
else:
338
213
return False
339
logger.info(u"Disabling client %s", self.name)
340
if getattr(self, u"disable_initiator_tag", False):
341
gobject.source_remove(self.disable_initiator_tag)
342
self.disable_initiator_tag = None
343
if getattr(self, u"checker_initiator_tag", False):
214
if hasattr(self, "stop_initiator_tag") \
215
and self.stop_initiator_tag:
216
gobject.source_remove(self.stop_initiator_tag)
217
self.stop_initiator_tag = None
218
if hasattr(self, "checker_initiator_tag") \
219
and self.checker_initiator_tag:
344
220
gobject.source_remove(self.checker_initiator_tag)
345
221
self.checker_initiator_tag = None
346
222
self.stop_checker()
347
if self.disable_hook:
348
self.disable_hook(self)
349
self.enabled = False
223
if self.stop_hook:
224
self.stop_hook(self)
350
225
# Do not run this again if called by a gobject.timeout_add
351
226
return False
352
353
227
def __del__(self):
354
self.disable_hook = None
355
self.disable()
356
357
def checker_callback(self, pid, condition, command):
228
self.stop_hook = None
229
self.stop()
230
def checker_callback(self, pid, condition):
358
231
"""The checker has completed, so take appropriate actions."""
232
now = datetime.datetime.now()
359
233
self.checker_callback_tag = None
360
234
self.checker = None
361
if os.WIFEXITED(condition):
362
exitstatus = os.WEXITSTATUS(condition)
363
if exitstatus == 0:
364
logger.info(u"Checker for %(name)s succeeded",
365
vars(self))
366
self.checked_ok()
367
else:
368
logger.info(u"Checker for %(name)s failed",
369
vars(self))
370
else:
235
if os.WIFEXITED(condition) \
236
and (os.WEXITSTATUS(condition) == 0):
237
logger.debug(u"Checker for %(name)s succeeded",
238
vars(self))
239
self.last_seen = now
240
gobject.source_remove(self.stop_initiator_tag)
241
self.stop_initiator_tag = gobject.timeout_add\
242
(self._timeout_milliseconds,
243
self.stop)
244
elif not os.WIFEXITED(condition):
371
245
logger.warning(u"Checker for %(name)s crashed?",
372
246
vars(self))
373
374
def checked_ok(self):
375
"""Bump up the timeout for this client.
376
377
This should only be called when the client has been seen,
378
alive and well.
379
"""
380
self.last_checked_ok = datetime.datetime.utcnow()
381
gobject.source_remove(self.disable_initiator_tag)
382
self.disable_initiator_tag = (gobject.timeout_add
383
(self.timeout_milliseconds(),
384
self.disable))
385
247
else:
248
logger.debug(u"Checker for %(name)s failed",
249
vars(self))
386
250
def start_checker(self):
387
251
"""Start a new checker subprocess if one is not running.
388
389
252
If a checker already exists, leave it running and do
390
253
nothing."""
391
254
# The reason for not killing a running checker is that if we
396
259
# checkers alone, the checker would have to take more time
397
260
# than 'timeout' for the client to be declared invalid, which
398
261
# is as it should be.
399
400
# If a checker exists, make sure it is not a zombie
401
if self.checker is not None:
402
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
403
if pid:
404
logger.warning(u"Checker was a zombie")
405
gobject.source_remove(self.checker_callback_tag)
406
self.checker_callback(pid, status,
407
self.current_checker_command)
408
# Start a new checker if needed
409
262
if self.checker is None:
410
263
try:
411
# In case checker_command has exactly one % operator
412
command = self.checker_command % self.host
264
command = self.check_command % self.fqdn
413
265
except TypeError:
414
# Escape attributes for the shell
415
escaped_attrs = dict((key,
416
re.escape(unicode(str(val),
417
errors=
418
u'replace')))
266
escaped_attrs = dict((key, re.escape(str(val)))
419
267
for key, val in
420
268
vars(self).iteritems())
421
269
try:
422
command = self.checker_command % escaped_attrs
270
command = self.check_command % escaped_attrs
423
271
except TypeError, error:
424
logger.error(u'Could not format string "%s":'
425
u' %s', self.checker_command, error)
272
logger.critical(u'Could not format string "%s":'
273
u' %s', self.check_command, error)
426
274
return True # Try again later
427
self.current_checker_command = command
428
275
try:
429
logger.info(u"Starting checker %r for %s",
430
command, self.name)
431
# We don't need to redirect stdout and stderr, since
432
# in normal mode, that is already done by daemon(),
433
# and in debug mode we don't want to. (Stdin is
434
# always replaced by /dev/null.)
435
self.checker = subprocess.Popen(command,
436
close_fds=True,
437
shell=True, cwd=u"/")
438
self.checker_callback_tag = (gobject.child_watch_add
439
(self.checker.pid,
440
self.checker_callback,
441
data=command))
442
# The checker may have completed before the gobject
443
# watch was added. Check for this.
444
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
445
if pid:
446
gobject.source_remove(self.checker_callback_tag)
447
self.checker_callback(pid, status, command)
448
except OSError, error:
276
logger.debug(u"Starting checker %r for %s",
277
command, self.name)
278
self.checker = subprocess.\
279
Popen(command,
280
close_fds=True, shell=True,
281
cwd="/")
282
self.checker_callback_tag = gobject.child_watch_add\
283
(self.checker.pid,
284
self.checker_callback)
285
except subprocess.OSError, error:
449
286
logger.error(u"Failed to start subprocess: %s",
450
287
error)
451
288
# Re-run this periodically if run by gobject.timeout_add
452
289
return True
453
454
290
def stop_checker(self):
455
291
"""Force the checker process, if any, to stop."""
456
292
if self.checker_callback_tag:
457
293
gobject.source_remove(self.checker_callback_tag)
458
294
self.checker_callback_tag = None
459
if getattr(self, u"checker", None) is None:
295
if not hasattr(self, "checker") or self.checker is None:
460
296
return
461
logger.debug(u"Stopping checker for %(name)s", vars(self))
297
logger.debug("Stopping checker for %(name)s", vars(self))
462
298
try:
463
299
os.kill(self.checker.pid, signal.SIGTERM)
464
300
#os.sleep(0.5)
465
301
#if self.checker.poll() is None:
466
302
# os.kill(self.checker.pid, signal.SIGKILL)
467
303
except OSError, error:
468
if error.errno != errno.ESRCH: # No such process
304
if error.errno != errno.ESRCH:
469
305
raise
470
306
self.checker = None
471
472
def still_valid(self):
307
def still_valid(self, now=None):
473
308
"""Has the timeout not yet passed for this client?"""
474
if not getattr(self, u"enabled", False):
475
return False
476
now = datetime.datetime.utcnow()
477
if self.last_checked_ok is None:
309
if now is None:
310
now = datetime.datetime.now()
311
if self.last_seen is None:
478
312
return now < (self.created + self.timeout)
479
313
else:
480
return now < (self.last_checked_ok + self.timeout)
481
482
483
def dbus_service_property(dbus_interface, signature=u"v",
484
access=u"readwrite", byte_arrays=False):
485
"""Decorators for marking methods of a DBusObjectWithProperties to
486
become properties on the D-Bus.
487
488
The decorated method will be called with no arguments by "Get"
489
and with one argument by "Set".
490
491
The parameters, where they are supported, are the same as
492
dbus.service.method, except there is only "signature", since the
493
type from Get() and the type sent to Set() is the same.
494
"""
495
def decorator(func):
496
func._dbus_is_property = True
497
func._dbus_interface = dbus_interface
498
func._dbus_signature = signature
499
func._dbus_access = access
500
func._dbus_name = func.__name__
501
if func._dbus_name.endswith(u"_dbus_property"):
502
func._dbus_name = func._dbus_name[:-14]
503
func._dbus_get_args_options = {u'byte_arrays': byte_arrays }
504
return func
505
return decorator
506
507
508
class DBusPropertyException(dbus.exceptions.DBusException):
509
"""A base class for D-Bus property-related exceptions
510
"""
511
def __unicode__(self):
512
return unicode(str(self))
513
514
515
class DBusPropertyAccessException(DBusPropertyException):
516
"""A property's access permissions disallows an operation.
517
"""
518
pass
519
520
521
class DBusPropertyNotFound(DBusPropertyException):
522
"""An attempt was made to access a non-existing property.
523
"""
524
pass
525
526
527
class DBusObjectWithProperties(dbus.service.Object):
528
"""A D-Bus object with properties.
529
530
Classes inheriting from this can use the dbus_service_property
531
decorator to expose methods as D-Bus properties. It exposes the
532
standard Get(), Set(), and GetAll() methods on the D-Bus.
533
"""
534
535
@staticmethod
536
def _is_dbus_property(obj):
537
return getattr(obj, u"_dbus_is_property", False)
538
539
def _get_all_dbus_properties(self):
540
"""Returns a generator of (name, attribute) pairs
541
"""
542
return ((prop._dbus_name, prop)
543
for name, prop in
544
inspect.getmembers(self, self._is_dbus_property))
545
546
def _get_dbus_property(self, interface_name, property_name):
547
"""Returns a bound method if one exists which is a D-Bus
548
property with the specified name and interface.
549
"""
550
for name in (property_name,
551
property_name + u"_dbus_property"):
552
prop = getattr(self, name, None)
553
if (prop is None
554
or not self._is_dbus_property(prop)
555
or prop._dbus_name != property_name
556
or (interface_name and prop._dbus_interface
557
and interface_name != prop._dbus_interface)):
558
continue
559
return prop
560
# No such property
561
raise DBusPropertyNotFound(self.dbus_object_path + u":"
562
+ interface_name + u"."
563
+ property_name)
564
565
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ss",
566
out_signature=u"v")
567
def Get(self, interface_name, property_name):
568
"""Standard D-Bus property Get() method, see D-Bus standard.
569
"""
570
prop = self._get_dbus_property(interface_name, property_name)
571
if prop._dbus_access == u"write":
572
raise DBusPropertyAccessException(property_name)
573
value = prop()
574
if not hasattr(value, u"variant_level"):
575
return value
576
return type(value)(value, variant_level=value.variant_level+1)
577
578
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ssv")
579
def Set(self, interface_name, property_name, value):
580
"""Standard D-Bus property Set() method, see D-Bus standard.
581
"""
582
prop = self._get_dbus_property(interface_name, property_name)
583
if prop._dbus_access == u"read":
584
raise DBusPropertyAccessException(property_name)
585
if prop._dbus_get_args_options[u"byte_arrays"]:
586
value = dbus.ByteArray(''.join(unichr(byte)
587
for byte in value))
588
prop(value)
589
590
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"s",
591
out_signature=u"a{sv}")
592
def GetAll(self, interface_name):
593
"""Standard D-Bus property GetAll() method, see D-Bus
594
standard.
595
596
Note: Will not include properties with access="write".
597
"""
598
all = {}
599
for name, prop in self._get_all_dbus_properties():
600
if (interface_name
601
and interface_name != prop._dbus_interface):
602
# Interface non-empty but did not match
603
continue
604
# Ignore write-only properties
605
if prop._dbus_access == u"write":
606
continue
607
value = prop()
608
if not hasattr(value, u"variant_level"):
609
all[name] = value
610
continue
611
all[name] = type(value)(value, variant_level=
612
value.variant_level+1)
613
return dbus.Dictionary(all, signature=u"sv")
614
615
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
616
out_signature=u"s",
617
path_keyword='object_path',
618
connection_keyword='connection')
619
def Introspect(self, object_path, connection):
620
"""Standard D-Bus method, overloaded to insert property tags.
621
"""
622
xmlstring = dbus.service.Object.Introspect(self, object_path,
623
connection)
624
document = xml.dom.minidom.parseString(xmlstring)
625
del xmlstring
626
def make_tag(document, name, prop):
627
e = document.createElement(u"property")
628
e.setAttribute(u"name", name)
629
e.setAttribute(u"type", prop._dbus_signature)
630
e.setAttribute(u"access", prop._dbus_access)
631
return e
632
for if_tag in document.getElementsByTagName(u"interface"):
633
for tag in (make_tag(document, name, prop)
634
for name, prop
635
in self._get_all_dbus_properties()
636
if prop._dbus_interface
637
== if_tag.getAttribute(u"name")):
638
if_tag.appendChild(tag)
639
xmlstring = document.toxml(u"utf-8")
640
document.unlink()
641
return xmlstring
642
643
644
class ClientDBus(Client, DBusObjectWithProperties):
645
"""A Client class using D-Bus
646
647
Attributes:
648
dbus_object_path: dbus.ObjectPath
649
bus: dbus.SystemBus()
650
"""
651
# dbus.service.Object doesn't use super(), so we can't either.
652
653
def __init__(self, bus = None, *args, **kwargs):
654
self.bus = bus
655
Client.__init__(self, *args, **kwargs)
656
# Only now, when this client is initialized, can it show up on
657
# the D-Bus
658
self.dbus_object_path = (dbus.ObjectPath
659
(u"/clients/"
660
+ self.name.replace(u".", u"_")))
661
DBusObjectWithProperties.__init__(self, self.bus,
662
self.dbus_object_path)
663
664
@staticmethod
665
def _datetime_to_dbus(dt, variant_level=0):
666
"""Convert a UTC datetime.datetime() to a D-Bus type."""
667
return dbus.String(dt.isoformat(),
668
variant_level=variant_level)
669
670
def enable(self):
671
oldstate = getattr(self, u"enabled", False)
672
r = Client.enable(self)
673
if oldstate != self.enabled:
674
# Emit D-Bus signals
675
self.PropertyChanged(dbus.String(u"enabled"),
676
dbus.Boolean(True, variant_level=1))
677
self.PropertyChanged(
678
dbus.String(u"last_enabled"),
679
self._datetime_to_dbus(self.last_enabled,
680
variant_level=1))
681
return r
682
683
def disable(self, signal = True):
684
oldstate = getattr(self, u"enabled", False)
685
r = Client.disable(self)
686
if signal and oldstate != self.enabled:
687
# Emit D-Bus signal
688
self.PropertyChanged(dbus.String(u"enabled"),
689
dbus.Boolean(False, variant_level=1))
690
return r
691
692
def __del__(self, *args, **kwargs):
693
try:
694
self.remove_from_connection()
695
except LookupError:
696
pass
697
if hasattr(DBusObjectWithProperties, u"__del__"):
698
DBusObjectWithProperties.__del__(self, *args, **kwargs)
699
Client.__del__(self, *args, **kwargs)
700
701
def checker_callback(self, pid, condition, command,
702
*args, **kwargs):
703
self.checker_callback_tag = None
704
self.checker = None
705
# Emit D-Bus signal
706
self.PropertyChanged(dbus.String(u"checker_running"),
707
dbus.Boolean(False, variant_level=1))
708
if os.WIFEXITED(condition):
709
exitstatus = os.WEXITSTATUS(condition)
710
# Emit D-Bus signal
711
self.CheckerCompleted(dbus.Int16(exitstatus),
712
dbus.Int64(condition),
713
dbus.String(command))
714
else:
715
# Emit D-Bus signal
716
self.CheckerCompleted(dbus.Int16(-1),
717
dbus.Int64(condition),
718
dbus.String(command))
719
720
return Client.checker_callback(self, pid, condition, command,
721
*args, **kwargs)
722
723
def checked_ok(self, *args, **kwargs):
724
r = Client.checked_ok(self, *args, **kwargs)
725
# Emit D-Bus signal
726
self.PropertyChanged(
727
dbus.String(u"last_checked_ok"),
728
(self._datetime_to_dbus(self.last_checked_ok,
729
variant_level=1)))
730
return r
731
732
def start_checker(self, *args, **kwargs):
733
old_checker = self.checker
734
if self.checker is not None:
735
old_checker_pid = self.checker.pid
736
else:
737
old_checker_pid = None
738
r = Client.start_checker(self, *args, **kwargs)
739
# Only if new checker process was started
740
if (self.checker is not None
741
and old_checker_pid != self.checker.pid):
742
# Emit D-Bus signal
743
self.CheckerStarted(self.current_checker_command)
744
self.PropertyChanged(
745
dbus.String(u"checker_running"),
746
dbus.Boolean(True, variant_level=1))
747
return r
748
749
def stop_checker(self, *args, **kwargs):
750
old_checker = getattr(self, u"checker", None)
751
r = Client.stop_checker(self, *args, **kwargs)
752
if (old_checker is not None
753
and getattr(self, u"checker", None) is None):
754
self.PropertyChanged(dbus.String(u"checker_running"),
755
dbus.Boolean(False, variant_level=1))
756
return r
757
758
## D-Bus methods & signals
759
_interface = u"se.bsnet.fukt.Mandos.Client"
760
761
# CheckerCompleted - signal
762
@dbus.service.signal(_interface, signature=u"nxs")
763
def CheckerCompleted(self, exitcode, waitstatus, command):
764
"D-Bus signal"
765
pass
766
767
# CheckerStarted - signal
768
@dbus.service.signal(_interface, signature=u"s")
769
def CheckerStarted(self, command):
770
"D-Bus signal"
771
pass
772
773
# PropertyChanged - signal
774
@dbus.service.signal(_interface, signature=u"sv")
775
def PropertyChanged(self, property, value):
776
"D-Bus signal"
777
pass
778
779
# ReceivedSecret - signal
780
@dbus.service.signal(_interface)
781
def ReceivedSecret(self):
782
"D-Bus signal"
783
pass
784
785
# Rejected - signal
786
@dbus.service.signal(_interface)
787
def Rejected(self):
788
"D-Bus signal"
789
pass
790
791
# name - property
792
@dbus_service_property(_interface, signature=u"s", access=u"read")
793
def name_dbus_property(self):
794
return dbus.String(self.name)
795
796
# fingerprint - property
797
@dbus_service_property(_interface, signature=u"s", access=u"read")
798
def fingerprint_dbus_property(self):
799
return dbus.String(self.fingerprint)
800
801
# host - property
802
@dbus_service_property(_interface, signature=u"s",
803
access=u"readwrite")
804
def host_dbus_property(self, value=None):
805
if value is None: # get
806
return dbus.String(self.host)
807
self.host = value
808
# Emit D-Bus signal
809
self.PropertyChanged(dbus.String(u"host"),
810
dbus.String(value, variant_level=1))
811
812
# created - property
813
@dbus_service_property(_interface, signature=u"s", access=u"read")
814
def created_dbus_property(self):
815
return dbus.String(self._datetime_to_dbus(self.created))
816
817
# last_enabled - property
818
@dbus_service_property(_interface, signature=u"s", access=u"read")
819
def last_enabled_dbus_property(self):
820
if self.last_enabled is None:
821
return dbus.String(u"")
822
return dbus.String(self._datetime_to_dbus(self.last_enabled))
823
824
# enabled - property
825
@dbus_service_property(_interface, signature=u"b",
826
access=u"readwrite")
827
def enabled_dbus_property(self, value=None):
828
if value is None: # get
829
return dbus.Boolean(self.enabled)
830
if value:
831
self.enable()
832
else:
833
self.disable()
834
835
# last_checked_ok - property
836
@dbus_service_property(_interface, signature=u"s", access=u"read")
837
def last_checked_ok_dbus_property(self):
838
if self.last_checked_ok is None:
839
return dbus.String(u"")
840
return dbus.String(self._datetime_to_dbus(self
841
.last_checked_ok))
842
843
# timeout - property
844
@dbus_service_property(_interface, signature=u"t",
845
access=u"readwrite")
846
def timeout_dbus_property(self, value=None):
847
if value is None: # get
848
return dbus.UInt64(self.timeout_milliseconds())
849
self.timeout = datetime.timedelta(0, 0, 0, value)
850
# Emit D-Bus signal
851
self.PropertyChanged(dbus.String(u"timeout"),
852
dbus.UInt64(value, variant_level=1))
853
if getattr(self, u"disable_initiator_tag", None) is None:
854
return
855
# Reschedule timeout
856
gobject.source_remove(self.disable_initiator_tag)
857
self.disable_initiator_tag = None
858
time_to_die = (self.
859
_timedelta_to_milliseconds((self
860
.last_checked_ok
861
+ self.timeout)
862
- datetime.datetime
863
.utcnow()))
864
if time_to_die <= 0:
865
# The timeout has passed
866
self.disable()
867
else:
868
self.disable_initiator_tag = (gobject.timeout_add
869
(time_to_die, self.disable))
870
871
# interval - property
872
@dbus_service_property(_interface, signature=u"t",
873
access=u"readwrite")
874
def interval_dbus_property(self, value=None):
875
if value is None: # get
876
return dbus.UInt64(self.interval_milliseconds())
877
self.interval = datetime.timedelta(0, 0, 0, value)
878
# Emit D-Bus signal
879
self.PropertyChanged(dbus.String(u"interval"),
880
dbus.UInt64(value, variant_level=1))
881
if getattr(self, u"checker_initiator_tag", None) is None:
882
return
883
# Reschedule checker run
884
gobject.source_remove(self.checker_initiator_tag)
885
self.checker_initiator_tag = (gobject.timeout_add
886
(value, self.start_checker))
887
self.start_checker() # Start one now, too
888
889
# checker - property
890
@dbus_service_property(_interface, signature=u"s",
891
access=u"readwrite")
892
def checker_dbus_property(self, value=None):
893
if value is None: # get
894
return dbus.String(self.checker_command)
895
self.checker_command = value
896
# Emit D-Bus signal
897
self.PropertyChanged(dbus.String(u"checker"),
898
dbus.String(self.checker_command,
899
variant_level=1))
900
901
# checker_running - property
902
@dbus_service_property(_interface, signature=u"b",
903
access=u"readwrite")
904
def checker_running_dbus_property(self, value=None):
905
if value is None: # get
906
return dbus.Boolean(self.checker is not None)
907
if value:
908
self.start_checker()
909
else:
910
self.stop_checker()
911
912
# object_path - property
913
@dbus_service_property(_interface, signature=u"o", access=u"read")
914
def object_path_dbus_property(self):
915
return self.dbus_object_path # is already a dbus.ObjectPath
916
917
# secret = property xxx
918
@dbus_service_property(_interface, signature=u"ay",
919
access=u"write", byte_arrays=True)
920
def secret_dbus_property(self, value):
921
self.secret = str(value)
922
923
del _interface
924
925
926
class ClientHandler(socketserver.BaseRequestHandler, object):
927
"""A class to handle client connections.
928
929
Instantiated once for each connection to handle it.
314
return now < (self.last_seen + self.timeout)
315
316
317
def peer_certificate(session):
318
"Return the peer's OpenPGP certificate as a bytestring"
319
# If not an OpenPGP certificate...
320
if gnutls.library.functions.gnutls_certificate_type_get\
321
(session._c_object) \
322
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP:
323
# ...do the normal thing
324
return session.peer_certificate
325
list_size = ctypes.c_uint()
326
cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
327
(session._c_object, ctypes.byref(list_size))
328
if list_size.value == 0:
329
return None
330
cert = cert_list[0]
331
return ctypes.string_at(cert.data, cert.size)
332
333
334
def fingerprint(openpgp):
335
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
336
# New empty GnuTLS certificate
337
crt = gnutls.library.types.gnutls_openpgp_crt_t()
338
gnutls.library.functions.gnutls_openpgp_crt_init\
339
(ctypes.byref(crt))
340
# New GnuTLS "datum" with the OpenPGP public key
341
datum = gnutls.library.types.gnutls_datum_t\
342
(ctypes.cast(ctypes.c_char_p(openpgp),
343
ctypes.POINTER(ctypes.c_ubyte)),
344
ctypes.c_uint(len(openpgp)))
345
# Import the OpenPGP public key into the certificate
346
ret = gnutls.library.functions.gnutls_openpgp_crt_import\
347
(crt,
348
ctypes.byref(datum),
349
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
350
# New buffer for the fingerprint
351
buffer = ctypes.create_string_buffer(20)
352
buffer_length = ctypes.c_size_t()
353
# Get the fingerprint from the certificate into the buffer
354
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
355
(crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
356
# Deinit the certificate
357
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
358
# Convert the buffer to a Python bytestring
359
fpr = ctypes.string_at(buffer, buffer_length.value)
360
# Convert the bytestring to hexadecimal notation
361
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
362
return hex_fpr
363
364
365
class tcp_handler(SocketServer.BaseRequestHandler, object):
366
"""A TCP request handler class.
367
Instantiated by IPv6_TCPServer for each request to handle it.
930
368
Note: This will run in its own forked process."""
931
369
932
370
def handle(self):
933
logger.info(u"TCP connection from: %s",
934
unicode(self.client_address))
935
logger.debug(u"IPC Pipe FD: %d", self.server.pipe[1])
936
# Open IPC pipe to parent process
937
with closing(os.fdopen(self.server.pipe[1], u"w", 1)) as ipc:
938
session = (gnutls.connection
939
.ClientSession(self.request,
940
gnutls.connection
941
.X509Credentials()))
942
943
line = self.request.makefile().readline()
944
logger.debug(u"Protocol version: %r", line)
945
try:
946
if int(line.strip().split()[0]) > 1:
947
raise RuntimeError
948
except (ValueError, IndexError, RuntimeError), error:
949
logger.error(u"Unknown protocol version: %s", error)
950
return
951
952
# Note: gnutls.connection.X509Credentials is really a
953
# generic GnuTLS certificate credentials object so long as
954
# no X.509 keys are added to it. Therefore, we can use it
955
# here despite using OpenPGP certificates.
956
957
#priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
958
# u"+AES-256-CBC", u"+SHA1",
959
# u"+COMP-NULL", u"+CTYPE-OPENPGP",
960
# u"+DHE-DSS"))
961
# Use a fallback default, since this MUST be set.
962
priority = self.server.gnutls_priority
963
if priority is None:
964
priority = u"NORMAL"
965
(gnutls.library.functions
966
.gnutls_priority_set_direct(session._c_object,
967
priority, None))
968
969
try:
970
session.handshake()
971
except gnutls.errors.GNUTLSError, error:
972
logger.warning(u"Handshake failed: %s", error)
973
# Do not run session.bye() here: the session is not
974
# established. Just abandon the request.
975
return
976
logger.debug(u"Handshake succeeded")
977
try:
978
fpr = self.fingerprint(self.peer_certificate(session))
979
except (TypeError, gnutls.errors.GNUTLSError), error:
980
logger.warning(u"Bad certificate: %s", error)
981
session.bye()
982
return
983
logger.debug(u"Fingerprint: %s", fpr)
984
985
for c in self.server.clients:
986
if c.fingerprint == fpr:
987
client = c
988
break
371
logger.debug(u"TCP connection from: %s",
372
unicode(self.client_address))
373
session = gnutls.connection.ClientSession(self.request,
374
gnutls.connection.\
375
X509Credentials())
376
377
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
378
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
379
# "+DHE-DSS"))
380
priority = "SECURE256"
381
382
gnutls.library.functions.gnutls_priority_set_direct\
383
(session._c_object, priority, None);
384
385
try:
386
session.handshake()
387
except gnutls.errors.GNUTLSError, error:
388
logger.debug(u"Handshake failed: %s", error)
389
# Do not run session.bye() here: the session is not
390
# established. Just abandon the request.
391
return
392
try:
393
fpr = fingerprint(peer_certificate(session))
394
except (TypeError, gnutls.errors.GNUTLSError), error:
395
logger.debug(u"Bad certificate: %s", error)
396
session.bye()
397
return
398
logger.debug(u"Fingerprint: %s", fpr)
399
client = None
400
for c in self.server.clients:
401
if c.fingerprint == fpr:
402
client = c
403
break
404
# Have to check if client.still_valid(), since it is possible
405
# that the client timed out while establishing the GnuTLS
406
# session.
407
if (not client) or (not client.still_valid()):
408
if client:
409
logger.debug(u"Client %(name)s is invalid",
410
vars(client))
989
411
else:
990
ipc.write(u"NOTFOUND %s %s\n"
991
% (fpr, unicode(self.client_address)))
992
session.bye()
993
return
994
# Have to check if client.still_valid(), since it is
995
# possible that the client timed out while establishing
996
# the GnuTLS session.
997
if not client.still_valid():
998
ipc.write(u"INVALID %s\n" % client.name)
999
session.bye()
1000
return
1001
ipc.write(u"SENDING %s\n" % client.name)
1002
sent_size = 0
1003
while sent_size < len(client.secret):
1004
sent = session.send(client.secret[sent_size:])
1005
logger.debug(u"Sent: %d, remaining: %d",
1006
sent, len(client.secret)
1007
- (sent_size + sent))
1008
sent_size += sent
412
logger.debug(u"Client not found for fingerprint: %s",
413
fpr)
1009
414
session.bye()
1010
1011
@staticmethod
1012
def peer_certificate(session):
1013
"Return the peer's OpenPGP certificate as a bytestring"
1014
# If not an OpenPGP certificate...
1015
if (gnutls.library.functions
1016
.gnutls_certificate_type_get(session._c_object)
1017
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1018
# ...do the normal thing
1019
return session.peer_certificate
1020
list_size = ctypes.c_uint(1)
1021
cert_list = (gnutls.library.functions
1022
.gnutls_certificate_get_peers
1023
(session._c_object, ctypes.byref(list_size)))
1024
if not bool(cert_list) and list_size.value != 0:
1025
raise gnutls.errors.GNUTLSError(u"error getting peer"
1026
u" certificate")
1027
if list_size.value == 0:
1028
return None
1029
cert = cert_list[0]
1030
return ctypes.string_at(cert.data, cert.size)
1031
1032
@staticmethod
1033
def fingerprint(openpgp):
1034
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1035
# New GnuTLS "datum" with the OpenPGP public key
1036
datum = (gnutls.library.types
1037
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1038
ctypes.POINTER
1039
(ctypes.c_ubyte)),
1040
ctypes.c_uint(len(openpgp))))
1041
# New empty GnuTLS certificate
1042
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1043
(gnutls.library.functions
1044
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1045
# Import the OpenPGP public key into the certificate
1046
(gnutls.library.functions
1047
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1048
gnutls.library.constants
1049
.GNUTLS_OPENPGP_FMT_RAW))
1050
# Verify the self signature in the key
1051
crtverify = ctypes.c_uint()
1052
(gnutls.library.functions
1053
.gnutls_openpgp_crt_verify_self(crt, 0,
1054
ctypes.byref(crtverify)))
1055
if crtverify.value != 0:
1056
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1057
raise (gnutls.errors.CertificateSecurityError
1058
(u"Verify failed"))
1059
# New buffer for the fingerprint
1060
buf = ctypes.create_string_buffer(20)
1061
buf_len = ctypes.c_size_t()
1062
# Get the fingerprint from the certificate into the buffer
1063
(gnutls.library.functions
1064
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1065
ctypes.byref(buf_len)))
1066
# Deinit the certificate
1067
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1068
# Convert the buffer to a Python bytestring
1069
fpr = ctypes.string_at(buf, buf_len.value)
1070
# Convert the bytestring to hexadecimal notation
1071
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
1072
return hex_fpr
1073
1074
1075
class ForkingMixInWithPipe(socketserver.ForkingMixIn, object):
1076
"""Like socketserver.ForkingMixIn, but also pass a pipe."""
1077
def process_request(self, request, client_address):
1078
"""Overrides and wraps the original process_request().
1079
1080
This function creates a new pipe in self.pipe
1081
"""
1082
self.pipe = os.pipe()
1083
super(ForkingMixInWithPipe,
1084
self).process_request(request, client_address)
1085
os.close(self.pipe[1]) # close write end
1086
self.add_pipe(self.pipe[0])
1087
def add_pipe(self, pipe):
1088
"""Dummy function; override as necessary"""
1089
os.close(pipe)
1090
1091
1092
class IPv6_TCPServer(ForkingMixInWithPipe,
1093
socketserver.TCPServer, object):
1094
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1095
415
return
416
sent_size = 0
417
while sent_size < len(client.secret):
418
sent = session.send(client.secret[sent_size:])
419
logger.debug(u"Sent: %d, remaining: %d",
420
sent, len(client.secret)
421
- (sent_size + sent))
422
sent_size += sent
423
session.bye()
424
425
426
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
427
"""IPv6 TCP server. Accepts 'None' as address and/or port.
1096
428
Attributes:
1097
enabled: Boolean; whether this server is activated yet
1098
interface: None or a network interface name (string)
1099
use_ipv6: Boolean; to use IPv6 or not
429
options: Command line options
430
clients: Set() of Client objects
1100
431
"""
1101
def __init__(self, server_address, RequestHandlerClass,
1102
interface=None, use_ipv6=True):
1103
self.interface = interface
1104
if use_ipv6:
1105
self.address_family = socket.AF_INET6
1106
socketserver.TCPServer.__init__(self, server_address,
1107
RequestHandlerClass)
432
address_family = socket.AF_INET6
433
def __init__(self, *args, **kwargs):
434
if "options" in kwargs:
435
self.options = kwargs["options"]
436
del kwargs["options"]
437
if "clients" in kwargs:
438
self.clients = kwargs["clients"]
439
del kwargs["clients"]
440
return super(type(self), self).__init__(*args, **kwargs)
1108
441
def server_bind(self):
1109
442
"""This overrides the normal server_bind() function
1110
443
to bind to an interface if one was specified, and also NOT to
1111
444
bind to an address or port if they were not specified."""
1112
if self.interface is not None:
1113
if SO_BINDTODEVICE is None:
1114
logger.error(u"SO_BINDTODEVICE does not exist;"
1115
u" cannot bind to interface %s",
1116
self.interface)
1117
else:
1118
try:
1119
self.socket.setsockopt(socket.SOL_SOCKET,
1120
SO_BINDTODEVICE,
1121
str(self.interface
1122
+ u'\0'))
1123
except socket.error, error:
1124
if error[0] == errno.EPERM:
1125
logger.error(u"No permission to"
1126
u" bind to interface %s",
1127
self.interface)
1128
elif error[0] == errno.ENOPROTOOPT:
1129
logger.error(u"SO_BINDTODEVICE not available;"
1130
u" cannot bind to interface %s",
1131
self.interface)
1132
else:
1133
raise
445
if self.options.interface:
446
if not hasattr(socket, "SO_BINDTODEVICE"):
447
# From /usr/include/asm-i486/socket.h
448
socket.SO_BINDTODEVICE = 25
449
try:
450
self.socket.setsockopt(socket.SOL_SOCKET,
451
socket.SO_BINDTODEVICE,
452
self.options.interface)
453
except socket.error, error:
454
if error[0] == errno.EPERM:
455
logger.warning(u"No permission to"
456
u" bind to interface %s",
457
self.options.interface)
458
else:
459
raise error
1134
460
# Only bind(2) the socket if we really need to.
1135
461
if self.server_address[0] or self.server_address[1]:
1136
462
if not self.server_address[0]:
1137
if self.address_family == socket.AF_INET6:
1138
any_address = u"::" # in6addr_any
1139
else:
1140
any_address = socket.INADDR_ANY
1141
self.server_address = (any_address,
463
in6addr_any = "::"
464
self.server_address = (in6addr_any,
1142
465
self.server_address[1])
1143
elif not self.server_address[1]:
466
elif self.server_address[1] is None:
1144
467
self.server_address = (self.server_address[0],
1145
468
0)
1146
# if self.interface:
1147
# self.server_address = (self.server_address[0],
1148
# 0, # port
1149
# 0, # flowinfo
1150
# if_nametoindex
1151
# (self.interface))
1152
return socketserver.TCPServer.server_bind(self)
1153
1154
1155
class MandosServer(IPv6_TCPServer):
1156
"""Mandos server.
1157
1158
Attributes:
1159
clients: set of Client objects
1160
gnutls_priority GnuTLS priority string
1161
use_dbus: Boolean; to emit D-Bus signals or not
1162
1163
Assumes a gobject.MainLoop event loop.
1164
"""
1165
def __init__(self, server_address, RequestHandlerClass,
1166
interface=None, use_ipv6=True, clients=None,
1167
gnutls_priority=None, use_dbus=True):
1168
self.enabled = False
1169
self.clients = clients
1170
if self.clients is None:
1171
self.clients = set()
1172
self.use_dbus = use_dbus
1173
self.gnutls_priority = gnutls_priority
1174
IPv6_TCPServer.__init__(self, server_address,
1175
RequestHandlerClass,
1176
interface = interface,
1177
use_ipv6 = use_ipv6)
1178
def server_activate(self):
1179
if self.enabled:
1180
return socketserver.TCPServer.server_activate(self)
1181
def enable(self):
1182
self.enabled = True
1183
def add_pipe(self, pipe):
1184
# Call "handle_ipc" for both data and EOF events
1185
gobject.io_add_watch(pipe, gobject.IO_IN | gobject.IO_HUP,
1186
self.handle_ipc)
1187
def handle_ipc(self, source, condition, file_objects={}):
1188
condition_names = {
1189
gobject.IO_IN: u"IN", # There is data to read.
1190
gobject.IO_OUT: u"OUT", # Data can be written (without
1191
# blocking).
1192
gobject.IO_PRI: u"PRI", # There is urgent data to read.
1193
gobject.IO_ERR: u"ERR", # Error condition.
1194
gobject.IO_HUP: u"HUP" # Hung up (the connection has been
1195
# broken, usually for pipes and
1196
# sockets).
1197
}
1198
conditions_string = ' | '.join(name
1199
for cond, name in
1200
condition_names.iteritems()
1201
if cond & condition)
1202
logger.debug(u"Handling IPC: FD = %d, condition = %s", source,
1203
conditions_string)
1204
1205
# Turn the pipe file descriptor into a Python file object
1206
if source not in file_objects:
1207
file_objects[source] = os.fdopen(source, u"r", 1)
1208
1209
# Read a line from the file object
1210
cmdline = file_objects[source].readline()
1211
if not cmdline: # Empty line means end of file
1212
# close the IPC pipe
1213
file_objects[source].close()
1214
del file_objects[source]
1215
1216
# Stop calling this function
1217
return False
1218
1219
logger.debug(u"IPC command: %r", cmdline)
1220
1221
# Parse and act on command
1222
cmd, args = cmdline.rstrip(u"\r\n").split(None, 1)
1223
1224
if cmd == u"NOTFOUND":
1225
logger.warning(u"Client not found for fingerprint: %s",
1226
args)
1227
if self.use_dbus:
1228
# Emit D-Bus signal
1229
mandos_dbus_service.ClientNotFound(args)
1230
elif cmd == u"INVALID":
1231
for client in self.clients:
1232
if client.name == args:
1233
logger.warning(u"Client %s is invalid", args)
1234
if self.use_dbus:
1235
# Emit D-Bus signal
1236
client.Rejected()
1237
break
1238
else:
1239
logger.error(u"Unknown client %s is invalid", args)
1240
elif cmd == u"SENDING":
1241
for client in self.clients:
1242
if client.name == args:
1243
logger.info(u"Sending secret to %s", client.name)
1244
client.checked_ok()
1245
if self.use_dbus:
1246
# Emit D-Bus signal
1247
client.ReceivedSecret()
1248
break
1249
else:
1250
logger.error(u"Sending secret to unknown client %s",
1251
args)
1252
else:
1253
logger.error(u"Unknown IPC command: %r", cmdline)
1254
1255
# Keep calling this function
1256
return True
469
return super(type(self), self).server_bind()
1257
470
1258
471
1259
472
def string_to_delta(interval):
1260
473
"""Parse a string and return a datetime.timedelta
1261
1262
>>> string_to_delta(u'7d')
474
475
>>> string_to_delta('7d')
1263
476
datetime.timedelta(7)
1264
>>> string_to_delta(u'60s')
477
>>> string_to_delta('60s')
1265
478
datetime.timedelta(0, 60)
1266
>>> string_to_delta(u'60m')
479
>>> string_to_delta('60m')
1267
480
datetime.timedelta(0, 3600)
1268
>>> string_to_delta(u'24h')
481
>>> string_to_delta('24h')
1269
482
datetime.timedelta(1)
1270
483
>>> string_to_delta(u'1w')
1271
484
datetime.timedelta(7)
1272
>>> string_to_delta(u'5m 30s')
1273
datetime.timedelta(0, 330)
1274
485
"""
1275
timevalue = datetime.timedelta(0)
1276
for s in interval.split():
1277
try:
1278
suffix = unicode(s[-1])
1279
value = int(s[:-1])
1280
if suffix == u"d":
1281
delta = datetime.timedelta(value)
1282
elif suffix == u"s":
1283
delta = datetime.timedelta(0, value)
1284
elif suffix == u"m":
1285
delta = datetime.timedelta(0, 0, 0, 0, value)
1286
elif suffix == u"h":
1287
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
1288
elif suffix == u"w":
1289
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1290
else:
1291
raise ValueError
1292
except (ValueError, IndexError):
486
try:
487
suffix=unicode(interval[-1])
488
value=int(interval[:-1])
489
if suffix == u"d":
490
delta = datetime.timedelta(value)
491
elif suffix == u"s":
492
delta = datetime.timedelta(0, value)
493
elif suffix == u"m":
494
delta = datetime.timedelta(0, 0, 0, 0, value)
495
elif suffix == u"h":
496
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
497
elif suffix == u"w":
498
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
499
else:
1293
500
raise ValueError
1294
timevalue += delta
1295
return timevalue
501
except (ValueError, IndexError):
502
raise ValueError
503
return delta
504
505
506
def add_service():
507
"""Derived from the Avahi example code"""
508
global group, serviceName, serviceType, servicePort, serviceTXT, \
509
domain, host
510
if group is None:
511
group = dbus.Interface(
512
bus.get_object( avahi.DBUS_NAME,
513
server.EntryGroupNew()),
514
avahi.DBUS_INTERFACE_ENTRY_GROUP)
515
group.connect_to_signal('StateChanged',
516
entry_group_state_changed)
517
logger.debug(u"Adding service '%s' of type '%s' ...",
518
serviceName, serviceType)
519
520
group.AddService(
521
serviceInterface, # interface
522
avahi.PROTO_INET6, # protocol
523
dbus.UInt32(0), # flags
524
serviceName, serviceType,
525
domain, host,
526
dbus.UInt16(servicePort),
527
avahi.string_array_to_txt_array(serviceTXT))
528
group.Commit()
529
530
531
def remove_service():
532
"""From the Avahi example code"""
533
global group
534
535
if not group is None:
536
group.Reset()
537
538
539
def server_state_changed(state):
540
"""Derived from the Avahi example code"""
541
if state == avahi.SERVER_COLLISION:
542
logger.warning(u"Server name collision")
543
remove_service()
544
elif state == avahi.SERVER_RUNNING:
545
add_service()
546
547
548
def entry_group_state_changed(state, error):
549
"""Derived from the Avahi example code"""
550
global serviceName, server, rename_count
551
552
logger.debug(u"state change: %i", state)
553
554
if state == avahi.ENTRY_GROUP_ESTABLISHED:
555
logger.debug(u"Service established.")
556
elif state == avahi.ENTRY_GROUP_COLLISION:
557
558
rename_count = rename_count - 1
559
if rename_count > 0:
560
name = server.GetAlternativeServiceName(name)
561
logger.warning(u"Service name collision, "
562
u"changing name to '%s' ...", name)
563
remove_service()
564
add_service()
565
566
else:
567
logger.error(u"No suitable service name found after %i"
568
u" retries, exiting.", n_rename)
569
killme(1)
570
elif state == avahi.ENTRY_GROUP_FAILURE:
571
logger.error(u"Error in group state changed %s",
572
unicode(error))
573
killme(1)
1296
574
1297
575
1298
576
def if_nametoindex(interface):
1299
"""Call the C function if_nametoindex(), or equivalent
1300
1301
Note: This function cannot accept a unicode string."""
1302
global if_nametoindex
577
"""Call the C function if_nametoindex()"""
1303
578
try:
1304
if_nametoindex = (ctypes.cdll.LoadLibrary
1305
(ctypes.util.find_library(u"c"))
1306
.if_nametoindex)
579
libc = ctypes.cdll.LoadLibrary("libc.so.6")
580
return libc.if_nametoindex(interface)
1307
581
except (OSError, AttributeError):
1308
logger.warning(u"Doing if_nametoindex the hard way")
1309
def if_nametoindex(interface):
1310
"Get an interface index the hard way, i.e. using fcntl()"
1311
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1312
with closing(socket.socket()) as s:
1313
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1314
struct.pack(str(u"16s16x"),
1315
interface))
1316
interface_index = struct.unpack(str(u"I"),
1317
ifreq[16:20])[0]
1318
return interface_index
1319
return if_nametoindex(interface)
1320
1321
1322
def daemon(nochdir = False, noclose = False):
582
if "struct" not in sys.modules:
583
import struct
584
if "fcntl" not in sys.modules:
585
import fcntl
586
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
587
s = socket.socket()
588
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
589
struct.pack("16s16x", interface))
590
s.close()
591
interface_index = struct.unpack("I", ifreq[16:20])[0]
592
return interface_index
593
594
595
def daemon(nochdir, noclose):
1323
596
"""See daemon(3). Standard BSD Unix function.
1324
1325
597
This should really exist as os.daemon, but it doesn't (yet)."""
1326
598
if os.fork():
1327
599
sys.exit()
1328
600
os.setsid()
1329
601
if not nochdir:
1330
os.chdir(u"/")
1331
if os.fork():
1332
sys.exit()
602
os.chdir("/")
1333
603
if not noclose:
1334
604
# Close all standard open file descriptors
1335
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
605
null = os.open("/dev/null", os.O_NOCTTY | os.O_RDWR)
1336
606
if not stat.S_ISCHR(os.fstat(null).st_mode):
1337
607
raise OSError(errno.ENODEV,
1338
u"/dev/null not a character device")
608
"/dev/null not a character device")
1339
609
os.dup2(null, sys.stdin.fileno())
1340
610
os.dup2(null, sys.stdout.fileno())
1341
611
os.dup2(null, sys.stderr.fileno())
1343
613
os.close(null)
1344
614
1345
615
616
def killme(status = 0):
617
logger.debug("Stopping server with exit status %d", status)
618
exitstatus = status
619
if main_loop_started:
620
main_loop.quit()
621
else:
622
sys.exit(status)
623
624
1346
625
def main():
1347
1348
##################################################################
1349
# Parsing of options, both command line and config file
1350
1351
parser = optparse.OptionParser(version = "%%prog %s" % version)
1352
parser.add_option("-i", u"--interface", type=u"string",
1353
metavar="IF", help=u"Bind to interface IF")
1354
parser.add_option("-a", u"--address", type=u"string",
1355
help=u"Address to listen for requests on")
1356
parser.add_option("-p", u"--port", type=u"int",
1357
help=u"Port number to receive requests on")
1358
parser.add_option("--check", action=u"store_true",
1359
help=u"Run self-test")
1360
parser.add_option("--debug", action=u"store_true",
1361
help=u"Debug mode; run in foreground and log to"
1362
u" terminal")
1363
parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1364
u" priority string (see GnuTLS documentation)")
1365
parser.add_option("--servicename", type=u"string",
1366
metavar=u"NAME", help=u"Zeroconf service name")
1367
parser.add_option("--configdir", type=u"string",
1368
default=u"/etc/mandos", metavar=u"DIR",
1369
help=u"Directory to search for configuration"
1370
u" files")
1371
parser.add_option("--no-dbus", action=u"store_false",
1372
dest=u"use_dbus", help=u"Do not provide D-Bus"
1373
u" system bus interface")
1374
parser.add_option("--no-ipv6", action=u"store_false",
1375
dest=u"use_ipv6", help=u"Do not use IPv6")
1376
options = parser.parse_args()[0]
626
global exitstatus
627
exitstatus = 0
628
global main_loop_started
629
main_loop_started = False
630
631
parser = OptionParser()
632
parser.add_option("-i", "--interface", type="string",
633
default=None, metavar="IF",
634
help="Bind to interface IF")
635
parser.add_option("-a", "--address", type="string", default=None,
636
help="Address to listen for requests on")
637
parser.add_option("-p", "--port", type="int", default=None,
638
help="Port number to receive requests on")
639
parser.add_option("--timeout", type="string", # Parsed later
640
default="1h",
641
help="Amount of downtime allowed for clients")
642
parser.add_option("--interval", type="string", # Parsed later
643
default="5m",
644
help="How often to check that a client is up")
645
parser.add_option("--check", action="store_true", default=False,
646
help="Run self-test")
647
parser.add_option("--debug", action="store_true", default=False,
648
help="Debug mode")
649
(options, args) = parser.parse_args()
1377
650
1378
651
if options.check:
1379
652
import doctest
1380
653
doctest.testmod()
1381
654
sys.exit()
1382
655
1383
# Default values for config file for server-global settings
1384
server_defaults = { u"interface": u"",
1385
u"address": u"",
1386
u"port": u"",
1387
u"debug": u"False",
1388
u"priority":
1389
u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1390
u"servicename": u"Mandos",
1391
u"use_dbus": u"True",
1392
u"use_ipv6": u"True",
1393
}
1394
1395
# Parse config file for server-global settings
1396
server_config = configparser.SafeConfigParser(server_defaults)
1397
del server_defaults
1398
server_config.read(os.path.join(options.configdir,
1399
u"mandos.conf"))
1400
# Convert the SafeConfigParser object to a dict
1401
server_settings = server_config.defaults()
1402
# Use the appropriate methods on the non-string config options
1403
for option in (u"debug", u"use_dbus", u"use_ipv6"):
1404
server_settings[option] = server_config.getboolean(u"DEFAULT",
1405
option)
1406
if server_settings["port"]:
1407
server_settings["port"] = server_config.getint(u"DEFAULT",
1408
u"port")
1409
del server_config
1410
1411
# Override the settings from the config file with command line
1412
# options, if set.
1413
for option in (u"interface", u"address", u"port", u"debug",
1414
u"priority", u"servicename", u"configdir",
1415
u"use_dbus", u"use_ipv6"):
1416
value = getattr(options, option)
1417
if value is not None:
1418
server_settings[option] = value
1419
del options
1420
# Force all strings to be unicode
1421
for option in server_settings.keys():
1422
if type(server_settings[option]) is str:
1423
server_settings[option] = unicode(server_settings[option])
1424
# Now we have our good server settings in "server_settings"
1425
1426
##################################################################
1427
1428
# For convenience
1429
debug = server_settings[u"debug"]
1430
use_dbus = server_settings[u"use_dbus"]
1431
use_ipv6 = server_settings[u"use_ipv6"]
1432
1433
if not debug:
1434
syslogger.setLevel(logging.WARNING)
1435
console.setLevel(logging.WARNING)
1436
1437
if server_settings[u"servicename"] != u"Mandos":
1438
syslogger.setFormatter(logging.Formatter
1439
(u'Mandos (%s) [%%(process)d]:'
1440
u' %%(levelname)s: %%(message)s'
1441
% server_settings[u"servicename"]))
1442
1443
# Parse config file with clients
1444
client_defaults = { u"timeout": u"1h",
1445
u"interval": u"5m",
1446
u"checker": u"fping -q -- %%(host)s",
1447
u"host": u"",
1448
}
1449
client_config = configparser.SafeConfigParser(client_defaults)
1450
client_config.read(os.path.join(server_settings[u"configdir"],
1451
u"clients.conf"))
1452
1453
global mandos_dbus_service
1454
mandos_dbus_service = None
1455
1456
tcp_server = MandosServer((server_settings[u"address"],
1457
server_settings[u"port"]),
1458
ClientHandler,
1459
interface=server_settings[u"interface"],
1460
use_ipv6=use_ipv6,
1461
gnutls_priority=
1462
server_settings[u"priority"],
1463
use_dbus=use_dbus)
1464
pidfilename = u"/var/run/mandos.pid"
1465
try:
1466
pidfile = open(pidfilename, u"w")
1467
except IOError:
1468
logger.error(u"Could not open file %r", pidfilename)
1469
1470
try:
1471
uid = pwd.getpwnam(u"_mandos").pw_uid
1472
gid = pwd.getpwnam(u"_mandos").pw_gid
1473
except KeyError:
1474
try:
1475
uid = pwd.getpwnam(u"mandos").pw_uid
1476
gid = pwd.getpwnam(u"mandos").pw_gid
1477
except KeyError:
1478
try:
1479
uid = pwd.getpwnam(u"nobody").pw_uid
1480
gid = pwd.getpwnam(u"nobody").pw_gid
1481
except KeyError:
1482
uid = 65534
1483
gid = 65534
1484
try:
1485
os.setgid(gid)
1486
os.setuid(uid)
1487
except OSError, error:
1488
if error[0] != errno.EPERM:
1489
raise error
1490
1491
# Enable all possible GnuTLS debugging
1492
if debug:
1493
# "Use a log level over 10 to enable all debugging options."
1494
# - GnuTLS manual
1495
gnutls.library.functions.gnutls_global_set_log_level(11)
1496
1497
@gnutls.library.types.gnutls_log_func
1498
def debug_gnutls(level, string):
1499
logger.debug(u"GnuTLS: %s", string[:-1])
1500
1501
(gnutls.library.functions
1502
.gnutls_global_set_log_function(debug_gnutls))
656
# Parse the time arguments
657
try:
658
options.timeout = string_to_delta(options.timeout)
659
except ValueError:
660
parser.error("option --timeout: Unparseable time")
661
try:
662
options.interval = string_to_delta(options.interval)
663
except ValueError:
664
parser.error("option --interval: Unparseable time")
665
666
# Parse config file
667
defaults = { "checker": "fping -q -- %%(fqdn)s" }
668
client_config = ConfigParser.SafeConfigParser(defaults)
669
#client_config.readfp(open("global.conf"), "global.conf")
670
client_config.read("mandos-clients.conf")
1503
671
1504
672
global main_loop
673
global bus
674
global server
1505
675
# From the Avahi example code
1506
676
DBusGMainLoop(set_as_default=True )
1507
677
main_loop = gobject.MainLoop()
1508
678
bus = dbus.SystemBus()
679
server = dbus.Interface(
680
bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
681
avahi.DBUS_INTERFACE_SERVER )
1509
682
# End of Avahi example code
1510
if use_dbus:
1511
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
1512
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1513
service = AvahiService(name = server_settings[u"servicename"],
1514
servicetype = u"_mandos._tcp",
1515
protocol = protocol, bus = bus)
1516
if server_settings["interface"]:
1517
service.interface = (if_nametoindex
1518
(str(server_settings[u"interface"])))
1519
683
1520
client_class = Client
1521
if use_dbus:
1522
client_class = functools.partial(ClientDBus, bus = bus)
1523
tcp_server.clients.update(set(
1524
client_class(name = section,
1525
config= dict(client_config.items(section)))
1526
for section in client_config.sections()))
1527
if not tcp_server.clients:
1528
logger.warning(u"No clients defined")
684
debug = options.debug
1529
685
1530
686
if debug:
1531
# Redirect stdin so all checkers get /dev/null
1532
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1533
os.dup2(null, sys.stdin.fileno())
1534
if null > 2:
1535
os.close(null)
1536
else:
1537
# No console logging
1538
logger.removeHandler(console)
1539
# Close all input and output, do double fork, etc.
1540
daemon()
1541
1542
try:
1543
with closing(pidfile):
1544
pid = os.getpid()
1545
pidfile.write(str(pid) + "\n")
1546
del pidfile
1547
except IOError:
1548
logger.error(u"Could not write to file %r with PID %d",
1549
pidfilename, pid)
1550
except NameError:
1551
# "pidfile" was never created
1552
pass
1553
del pidfilename
687
console = logging.StreamHandler()
688
# console.setLevel(logging.DEBUG)
689
console.setFormatter(logging.Formatter\
690
('%(levelname)s: %(message)s'))
691
logger.addHandler(console)
692
del console
693
694
clients = Set()
695
def remove_from_clients(client):
696
clients.remove(client)
697
if not clients:
698
logger.debug(u"No clients left, exiting")
699
killme()
700
701
clients.update(Set(Client(name=section, options=options,
702
stop_hook = remove_from_clients,
703
**(dict(client_config\
704
.items(section))))
705
for section in client_config.sections()))
706
707
if not debug:
708
daemon(False, False)
1554
709
1555
710
def cleanup():
1556
711
"Cleanup function; run on exit"
1557
service.cleanup()
712
global group
713
# From the Avahi example code
714
if not group is None:
715
group.Free()
716
group = None
717
# End of Avahi example code
1558
718
1559
while tcp_server.clients:
1560
client = tcp_server.clients.pop()
1561
client.disable_hook = None
1562
client.disable()
719
while clients:
720
client = clients.pop()
721
client.stop_hook = None
722
client.stop()
1563
723
1564
724
atexit.register(cleanup)
1565
725
1566
726
if not debug:
1567
727
signal.signal(signal.SIGINT, signal.SIG_IGN)
1568
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1569
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1570
1571
if use_dbus:
1572
class MandosDBusService(dbus.service.Object):
1573
"""A D-Bus proxy object"""
1574
def __init__(self):
1575
dbus.service.Object.__init__(self, bus, u"/")
1576
_interface = u"se.bsnet.fukt.Mandos"
1577
1578
@dbus.service.signal(_interface, signature=u"oa{sv}")
1579
def ClientAdded(self, objpath, properties):
1580
"D-Bus signal"
1581
pass
1582
1583
@dbus.service.signal(_interface, signature=u"s")
1584
def ClientNotFound(self, fingerprint):
1585
"D-Bus signal"
1586
pass
1587
1588
@dbus.service.signal(_interface, signature=u"os")
1589
def ClientRemoved(self, objpath, name):
1590
"D-Bus signal"
1591
pass
1592
1593
@dbus.service.method(_interface, out_signature=u"ao")
1594
def GetAllClients(self):
1595
"D-Bus method"
1596
return dbus.Array(c.dbus_object_path
1597
for c in tcp_server.clients)
1598
1599
@dbus.service.method(_interface,
1600
out_signature=u"a{oa{sv}}")
1601
def GetAllClientsWithProperties(self):
1602
"D-Bus method"
1603
return dbus.Dictionary(
1604
((c.dbus_object_path, c.GetAll(u""))
1605
for c in tcp_server.clients),
1606
signature=u"oa{sv}")
1607
1608
@dbus.service.method(_interface, in_signature=u"o")
1609
def RemoveClient(self, object_path):
1610
"D-Bus method"
1611
for c in tcp_server.clients:
1612
if c.dbus_object_path == object_path:
1613
tcp_server.clients.remove(c)
1614
c.remove_from_connection()
1615
# Don't signal anything except ClientRemoved
1616
c.disable(signal=False)
1617
# Emit D-Bus signal
1618
self.ClientRemoved(object_path, c.name)
1619
return
1620
raise KeyError
1621
1622
del _interface
1623
1624
mandos_dbus_service = MandosDBusService()
1625
1626
for client in tcp_server.clients:
1627
if use_dbus:
1628
# Emit D-Bus signal
1629
mandos_dbus_service.ClientAdded(client.dbus_object_path,
1630
client.GetAll(u""))
1631
client.enable()
1632
1633
tcp_server.enable()
1634
tcp_server.server_activate()
1635
1636
# Find out what port we got
1637
service.port = tcp_server.socket.getsockname()[1]
1638
if use_ipv6:
1639
logger.info(u"Now listening on address %r, port %d,"
1640
" flowinfo %d, scope_id %d"
1641
% tcp_server.socket.getsockname())
1642
else: # IPv4
1643
logger.info(u"Now listening on address %r, port %d"
1644
% tcp_server.socket.getsockname())
1645
1646
#service.interface = tcp_server.socket.getsockname()[3]
1647
1648
try:
1649
# From the Avahi example code
1650
try:
1651
service.activate()
1652
except dbus.exceptions.DBusException, error:
1653
logger.critical(u"DBusException: %s", error)
1654
sys.exit(1)
1655
# End of Avahi example code
1656
1657
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
1658
lambda *args, **kwargs:
1659
(tcp_server.handle_request
1660
(*args[2:], **kwargs) or True))
1661
1662
logger.debug(u"Starting main loop")
728
signal.signal(signal.SIGHUP, lambda signum, frame: killme())
729
signal.signal(signal.SIGTERM, lambda signum, frame: killme())
730
731
for client in clients:
732
client.start()
733
734
tcp_server = IPv6_TCPServer((options.address, options.port),
735
tcp_handler,
736
options=options,
737
clients=clients)
738
# Find out what random port we got
739
global servicePort
740
servicePort = tcp_server.socket.getsockname()[1]
741
logger.debug(u"Now listening on port %d", servicePort)
742
743
if options.interface is not None:
744
global serviceInterface
745
serviceInterface = if_nametoindex(options.interface)
746
747
# From the Avahi example code
748
server.connect_to_signal("StateChanged", server_state_changed)
749
try:
750
server_state_changed(server.GetState())
751
except dbus.exceptions.DBusException, error:
752
logger.critical(u"DBusException: %s", error)
753
killme(1)
754
# End of Avahi example code
755
756
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
757
lambda *args, **kwargs:
758
tcp_server.handle_request(*args[2:],
759
**kwargs) or True)
760
try:
761
logger.debug("Starting main loop")
762
main_loop_started = True
1663
763
main_loop.run()
1664
except AvahiError, error:
1665
logger.critical(u"AvahiError: %s", error)
1666
sys.exit(1)
1667
764
except KeyboardInterrupt:
1668
765
if debug:
1669
print >> sys.stderr
1670
logger.debug(u"Server received KeyboardInterrupt")
1671
logger.debug(u"Server exiting")
766
print
767
768
sys.exit(exitstatus)
1672
769
1673
770
if __name__ == '__main__':
1674
771
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0