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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" and "remove" in the "AvahiService" class, the
10
# "server_state_changed" and "entry_group_state_changed" functions,
11
# 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
2
34
from __future__ import division, with_statement, absolute_import
3
from __future__ import division
35
4
36
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
51
21
import signal
52
22
from sets import Set
53
23
import subprocess
54
import atexit
55
import stat
56
import logging
57
import logging.handlers
58
import pwd
59
from contextlib import closing
60
24
61
25
import dbus
62
import dbus.service
63
26
import gobject
64
27
import avahi
65
28
from dbus.mainloop.glib import DBusGMainLoop
66
29
import ctypes
67
import ctypes.util
68
69
version = "1.0.5"
30
31
import logging
32
import logging.handlers
33
34
# logghandler.setFormatter(logging.Formatter('%(levelname)s %(message)s')
70
35
71
36
logger = logging.Logger('mandos')
72
syslogger = (logging.handlers.SysLogHandler
73
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
74
address = "/dev/log"))
75
syslogger.setFormatter(logging.Formatter
76
('Mandos: %(levelname)s: %(message)s'))
77
logger.addHandler(syslogger)
78
79
console = logging.StreamHandler()
80
console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
81
' %(message)s'))
82
logger.addHandler(console)
83
84
class AvahiError(Exception):
85
def __init__(self, value, *args, **kwargs):
86
self.value = value
87
super(AvahiError, self).__init__(value, *args, **kwargs)
88
def __unicode__(self):
89
return unicode(repr(self.value))
90
91
class AvahiServiceError(AvahiError):
92
pass
93
94
class AvahiGroupError(AvahiError):
95
pass
96
97
98
class AvahiService(object):
99
"""An Avahi (Zeroconf) service.
100
Attributes:
101
interface: integer; avahi.IF_UNSPEC or an interface index.
102
Used to optionally bind to the specified interface.
103
name: string; Example: 'Mandos'
104
type: string; Example: '_mandos._tcp'.
105
See <http://www.dns-sd.org/ServiceTypes.html>
106
port: integer; what port to announce
107
TXT: list of strings; TXT record for the service
108
domain: string; Domain to publish on, default to .local if empty.
109
host: string; Host to publish records for, default is localhost
110
max_renames: integer; maximum number of renames
111
rename_count: integer; counter so we only rename after collisions
112
a sensible number of times
113
"""
114
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
115
servicetype = None, port = None, TXT = None,
116
domain = "", host = "", max_renames = 32768):
117
self.interface = interface
118
self.name = name
119
self.type = servicetype
120
self.port = port
121
self.TXT = TXT if TXT is not None else []
122
self.domain = domain
123
self.host = host
124
self.rename_count = 0
125
self.max_renames = max_renames
126
def rename(self):
127
"""Derived from the Avahi example code"""
128
if self.rename_count >= self.max_renames:
129
logger.critical(u"No suitable Zeroconf service name found"
130
u" after %i retries, exiting.",
131
self.rename_count)
132
raise AvahiServiceError(u"Too many renames")
133
self.name = server.GetAlternativeServiceName(self.name)
134
logger.info(u"Changing Zeroconf service name to %r ...",
135
str(self.name))
136
syslogger.setFormatter(logging.Formatter
137
('Mandos (%s): %%(levelname)s:'
138
' %%(message)s' % self.name))
139
self.remove()
140
self.add()
141
self.rename_count += 1
142
def remove(self):
143
"""Derived from the Avahi example code"""
144
if group is not None:
145
group.Reset()
146
def add(self):
147
"""Derived from the Avahi example code"""
148
global group
149
if group is None:
150
group = dbus.Interface(bus.get_object
151
(avahi.DBUS_NAME,
152
server.EntryGroupNew()),
153
avahi.DBUS_INTERFACE_ENTRY_GROUP)
154
group.connect_to_signal('StateChanged',
155
entry_group_state_changed)
156
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
157
service.name, service.type)
158
group.AddService(
159
self.interface, # interface
160
avahi.PROTO_INET6, # protocol
161
dbus.UInt32(0), # flags
162
self.name, self.type,
163
self.domain, self.host,
164
dbus.UInt16(self.port),
165
avahi.string_array_to_txt_array(self.TXT))
166
group.Commit()
167
168
# From the Avahi example code:
169
group = None # our entry group
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
170
53
# End of Avahi example code
171
54
172
55
173
def _datetime_to_dbus(dt, variant_level=0):
174
"""Convert a UTC datetime.datetime() to a D-Bus type."""
175
return dbus.String(dt.isoformat(), variant_level=variant_level)
176
177
178
class Client(dbus.service.Object):
56
class Client(object):
179
57
"""A representation of a client host served by this server.
180
58
Attributes:
181
name: string; from the config file, used in log messages and
182
D-Bus identifiers
59
name: string; from the config file, used in log messages
183
60
fingerprint: string (40 or 32 hexadecimal digits); used to
184
61
uniquely identify the client
185
secret: bytestring; sent verbatim (over TLS) to client
186
host: string; available for use by the checker command
187
created: datetime.datetime(); (UTC) object creation
188
last_enabled: datetime.datetime(); (UTC)
189
enabled: bool()
190
last_checked_ok: datetime.datetime(); (UTC) or None
191
timeout: datetime.timedelta(); How long from last_checked_ok
192
until this client is invalid
193
interval: datetime.timedelta(); How often to start a new checker
194
disable_hook: If set, called by disable() as disable_hook(self)
195
checker: subprocess.Popen(); a running checker process used
196
to see if the client lives.
197
'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.
198
73
checker_initiator_tag: a gobject event source tag, or None
199
disable_initiator_tag: - '' -
74
stop_initiator_tag: - '' -
200
75
checker_callback_tag: - '' -
201
76
checker_command: string; External command which is run to check if
202
client lives. %() expansions are done at
77
client lives. %()s expansions are done at
203
78
runtime with vars(self) as dict, so that for
204
79
instance %(name)s can be used in the command.
205
use_dbus: bool(); Whether to provide D-Bus interface and signals
206
dbus_object_path: dbus.ObjectPath ; only set if self.use_dbus
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: - '' -
207
85
"""
208
def timeout_milliseconds(self):
209
"Return the 'timeout' attribute in milliseconds"
210
return ((self.timeout.days * 24 * 60 * 60 * 1000)
211
+ (self.timeout.seconds * 1000)
212
+ (self.timeout.microseconds // 1000))
213
214
def interval_milliseconds(self):
215
"Return the 'interval' attribute in milliseconds"
216
return ((self.interval.days * 24 * 60 * 60 * 1000)
217
+ (self.interval.seconds * 1000)
218
+ (self.interval.microseconds // 1000))
219
220
def __init__(self, name = None, disable_hook=None, config=None,
221
use_dbus=True):
222
"""Note: the 'checker' key in 'config' sets the
223
'checker_command' attribute and *not* the 'checker'
224
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):
225
112
self.name = name
226
if config is None:
227
config = {}
228
logger.debug(u"Creating client %r", self.name)
229
self.use_dbus = False # During __init__
230
# Uppercase and remove spaces from fingerprint for later
231
# comparison purposes with return value from the fingerprint()
232
# function
233
self.fingerprint = (config["fingerprint"].upper()
234
.replace(u" ", u""))
235
logger.debug(u" Fingerprint: %s", self.fingerprint)
236
if "secret" in config:
237
self.secret = config["secret"].decode(u"base64")
238
elif "secfile" in config:
239
with closing(open(os.path.expanduser
240
(os.path.expandvars
241
(config["secfile"])))) as secfile:
242
self.secret = secfile.read()
243
else:
244
raise TypeError(u"No secret or secfile for client %s"
245
% self.name)
246
self.host = config.get("host", "")
247
self.created = datetime.datetime.utcnow()
248
self.enabled = False
249
self.last_enabled = None
250
self.last_checked_ok = None
251
self.timeout = string_to_delta(config["timeout"])
252
self.interval = string_to_delta(config["interval"])
253
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
254
138
self.checker = None
255
139
self.checker_initiator_tag = None
256
self.disable_initiator_tag = None
140
self.stop_initiator_tag = None
257
141
self.checker_callback_tag = None
258
self.checker_command = config["checker"]
259
self.last_connect = None
260
# Only now, when this client is initialized, can it show up on
261
# the D-Bus
262
self.use_dbus = use_dbus
263
if self.use_dbus:
264
self.dbus_object_path = (dbus.ObjectPath
265
("/clients/"
266
+ self.name.replace(".", "_")))
267
dbus.service.Object.__init__(self, bus,
268
self.dbus_object_path)
269
270
def enable(self):
271
"""Start this client's checker and timeout hooks"""
272
self.last_enabled = datetime.datetime.utcnow()
142
self.check_command = checker
143
def start(self):
144
"""Start this clients checker and timeout hooks"""
273
145
# Schedule a new checker to be started an 'interval' from now,
274
146
# and every interval from then on.
275
self.checker_initiator_tag = (gobject.timeout_add
276
(self.interval_milliseconds(),
277
self.start_checker))
147
self.checker_initiator_tag = gobject.timeout_add\
148
(self._interval_milliseconds,
149
self.start_checker)
278
150
# Also start a new checker *right now*.
279
151
self.start_checker()
280
# Schedule a disable() when 'timeout' has passed
281
self.disable_initiator_tag = (gobject.timeout_add
282
(self.timeout_milliseconds(),
283
self.disable))
284
self.enabled = True
285
if self.use_dbus:
286
# Emit D-Bus signals
287
self.PropertyChanged(dbus.String(u"enabled"),
288
dbus.Boolean(True, variant_level=1))
289
self.PropertyChanged(dbus.String(u"last_enabled"),
290
(_datetime_to_dbus(self.last_enabled,
291
variant_level=1)))
292
293
def disable(self):
294
"""Disable this client."""
295
if not getattr(self, "enabled", False):
296
return False
297
logger.info(u"Disabling client %s", self.name)
298
if getattr(self, "disable_initiator_tag", False):
299
gobject.source_remove(self.disable_initiator_tag)
300
self.disable_initiator_tag = None
301
if getattr(self, "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:
302
166
gobject.source_remove(self.checker_initiator_tag)
303
167
self.checker_initiator_tag = None
304
168
self.stop_checker()
305
if self.disable_hook:
306
self.disable_hook(self)
307
self.enabled = False
308
if self.use_dbus:
309
# Emit D-Bus signal
310
self.PropertyChanged(dbus.String(u"enabled"),
311
dbus.Boolean(False, variant_level=1))
169
if self.stop_hook:
170
self.stop_hook(self)
312
171
# Do not run this again if called by a gobject.timeout_add
313
172
return False
314
315
173
def __del__(self):
316
self.disable_hook = None
317
self.disable()
318
319
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):
320
185
"""The checker has completed, so take appropriate actions."""
321
self.checker_callback_tag = None
322
self.checker = None
323
if self.use_dbus:
324
# Emit D-Bus signal
325
self.PropertyChanged(dbus.String(u"checker_running"),
326
dbus.Boolean(False, variant_level=1))
327
if (os.WIFEXITED(condition)
328
and (os.WEXITSTATUS(condition) == 0)):
329
logger.info(u"Checker for %(name)s succeeded",
330
vars(self))
331
if self.use_dbus:
332
# Emit D-Bus signal
333
self.CheckerCompleted(dbus.Boolean(True),
334
dbus.UInt16(condition),
335
dbus.String(command))
336
self.bump_timeout()
337
elif not os.WIFEXITED(condition):
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):
338
197
logger.warning(u"Checker for %(name)s crashed?",
339
198
vars(self))
340
if self.use_dbus:
341
# Emit D-Bus signal
342
self.CheckerCompleted(dbus.Boolean(False),
343
dbus.UInt16(condition),
344
dbus.String(command))
345
199
else:
346
logger.info(u"Checker for %(name)s failed",
347
vars(self))
348
if self.use_dbus:
349
# Emit D-Bus signal
350
self.CheckerCompleted(dbus.Boolean(False),
351
dbus.UInt16(condition),
352
dbus.String(command))
353
354
def bump_timeout(self):
355
"""Bump up the timeout for this client.
356
This should only be called when the client has been seen,
357
alive and well.
358
"""
359
self.last_checked_ok = datetime.datetime.utcnow()
360
gobject.source_remove(self.disable_initiator_tag)
361
self.disable_initiator_tag = (gobject.timeout_add
362
(self.timeout_milliseconds(),
363
self.disable))
364
if self.use_dbus:
365
# Emit D-Bus signal
366
self.PropertyChanged(
367
dbus.String(u"last_checked_ok"),
368
(_datetime_to_dbus(self.last_checked_ok,
369
variant_level=1)))
370
200
logger.debug(u"Checker for %(name)s failed",
201
vars(self))
202
self.checker = None
203
self.checker_callback_tag = None
371
204
def start_checker(self):
372
205
"""Start a new checker subprocess if one is not running.
373
206
If a checker already exists, leave it running and do
374
207
nothing."""
375
# The reason for not killing a running checker is that if we
376
# did that, then if a checker (for some reason) started
377
# running slowly and taking more than 'interval' time, the
378
# client would inevitably timeout, since no checker would get
379
# a chance to run to completion. If we instead leave running
380
# checkers alone, the checker would have to take more time
381
# than 'timeout' for the client to be declared invalid, which
382
# is as it should be.
383
208
if self.checker is None:
209
logger.debug(u"Starting checker for %s",
210
self.name)
384
211
try:
385
# In case checker_command has exactly one % operator
386
command = self.checker_command % self.host
212
command = self.check_command % self.fqdn
387
213
except TypeError:
388
# Escape attributes for the shell
389
214
escaped_attrs = dict((key, re.escape(str(val)))
390
215
for key, val in
391
216
vars(self).iteritems())
392
217
try:
393
command = self.checker_command % escaped_attrs
218
command = self.check_command % escaped_attrs
394
219
except TypeError, error:
395
logger.error(u'Could not format string "%s":'
396
u' %s', self.checker_command, error)
220
logger.critical(u'Could not format string "%s": %s',
221
self.check_command, error)
397
222
return True # Try again later
398
223
try:
399
logger.info(u"Starting checker %r for %s",
400
command, self.name)
401
# We don't need to redirect stdout and stderr, since
402
# in normal mode, that is already done by daemon(),
403
# and in debug mode we don't want to. (Stdin is
404
# always replaced by /dev/null.)
405
self.checker = subprocess.Popen(command,
406
close_fds=True,
407
shell=True, cwd="/")
408
if self.use_dbus:
409
# Emit D-Bus signal
410
self.CheckerStarted(command)
411
self.PropertyChanged(
412
dbus.String("checker_running"),
413
dbus.Boolean(True, variant_level=1))
414
self.checker_callback_tag = (gobject.child_watch_add
415
(self.checker.pid,
416
self.checker_callback,
417
data=command))
418
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:
419
234
logger.error(u"Failed to start subprocess: %s",
420
235
error)
421
236
# Re-run this periodically if run by gobject.timeout_add
422
237
return True
423
424
238
def stop_checker(self):
425
239
"""Force the checker process, if any, to stop."""
426
if self.checker_callback_tag:
427
gobject.source_remove(self.checker_callback_tag)
428
self.checker_callback_tag = None
429
if getattr(self, "checker", None) is None:
240
if not hasattr(self, "checker") or self.checker is None:
430
241
return
431
logger.debug(u"Stopping checker for %(name)s", vars(self))
432
try:
433
os.kill(self.checker.pid, signal.SIGTERM)
434
#os.sleep(0.5)
435
#if self.checker.poll() is None:
436
# os.kill(self.checker.pid, signal.SIGKILL)
437
except OSError, error:
438
if error.errno != errno.ESRCH: # No such process
439
raise
242
gobject.source_remove(self.checker_callback_tag)
243
self.checker_callback_tag = None
244
os.kill(self.checker.pid, signal.SIGTERM)
245
if self.checker.poll() is None:
246
os.kill(self.checker.pid, signal.SIGKILL)
440
247
self.checker = None
441
if self.use_dbus:
442
self.PropertyChanged(dbus.String(u"checker_running"),
443
dbus.Boolean(False, variant_level=1))
444
445
def still_valid(self):
248
def still_valid(self, now=None):
446
249
"""Has the timeout not yet passed for this client?"""
447
if not getattr(self, "enabled", False):
448
return False
449
now = datetime.datetime.utcnow()
450
if self.last_checked_ok is None:
250
if now is None:
251
now = datetime.datetime.now()
252
if self.last_seen is None:
451
253
return now < (self.created + self.timeout)
452
254
else:
453
return now < (self.last_checked_ok + self.timeout)
454
455
## D-Bus methods & signals
456
_interface = u"se.bsnet.fukt.Mandos.Client"
457
458
# BumpTimeout - method
459
BumpTimeout = dbus.service.method(_interface)(bump_timeout)
460
BumpTimeout.__name__ = "BumpTimeout"
461
462
# CheckerCompleted - signal
463
@dbus.service.signal(_interface, signature="bqs")
464
def CheckerCompleted(self, success, condition, command):
465
"D-Bus signal"
466
pass
467
468
# CheckerStarted - signal
469
@dbus.service.signal(_interface, signature="s")
470
def CheckerStarted(self, command):
471
"D-Bus signal"
472
pass
473
474
# GetAllProperties - method
475
@dbus.service.method(_interface, out_signature="a{sv}")
476
def GetAllProperties(self):
477
"D-Bus method"
478
return dbus.Dictionary({
479
dbus.String("name"):
480
dbus.String(self.name, variant_level=1),
481
dbus.String("fingerprint"):
482
dbus.String(self.fingerprint, variant_level=1),
483
dbus.String("host"):
484
dbus.String(self.host, variant_level=1),
485
dbus.String("created"):
486
_datetime_to_dbus(self.created, variant_level=1),
487
dbus.String("last_enabled"):
488
(_datetime_to_dbus(self.last_enabled,
489
variant_level=1)
490
if self.last_enabled is not None
491
else dbus.Boolean(False, variant_level=1)),
492
dbus.String("enabled"):
493
dbus.Boolean(self.enabled, variant_level=1),
494
dbus.String("last_checked_ok"):
495
(_datetime_to_dbus(self.last_checked_ok,
496
variant_level=1)
497
if self.last_checked_ok is not None
498
else dbus.Boolean (False, variant_level=1)),
499
dbus.String("timeout"):
500
dbus.UInt64(self.timeout_milliseconds(),
501
variant_level=1),
502
dbus.String("interval"):
503
dbus.UInt64(self.interval_milliseconds(),
504
variant_level=1),
505
dbus.String("checker"):
506
dbus.String(self.checker_command,
507
variant_level=1),
508
dbus.String("checker_running"):
509
dbus.Boolean(self.checker is not None,
510
variant_level=1),
511
dbus.String("object_path"):
512
dbus.ObjectPath(self.dbus_object_path,
513
variant_level=1)
514
}, signature="sv")
515
516
# IsStillValid - method
517
IsStillValid = (dbus.service.method(_interface, out_signature="b")
518
(still_valid))
519
IsStillValid.__name__ = "IsStillValid"
520
521
# PropertyChanged - signal
522
@dbus.service.signal(_interface, signature="sv")
523
def PropertyChanged(self, property, value):
524
"D-Bus signal"
525
pass
526
527
# SetChecker - method
528
@dbus.service.method(_interface, in_signature="s")
529
def SetChecker(self, checker):
530
"D-Bus setter method"
531
self.checker_command = checker
532
# Emit D-Bus signal
533
self.PropertyChanged(dbus.String(u"checker"),
534
dbus.String(self.checker_command,
535
variant_level=1))
536
537
# SetHost - method
538
@dbus.service.method(_interface, in_signature="s")
539
def SetHost(self, host):
540
"D-Bus setter method"
541
self.host = host
542
# Emit D-Bus signal
543
self.PropertyChanged(dbus.String(u"host"),
544
dbus.String(self.host, variant_level=1))
545
546
# SetInterval - method
547
@dbus.service.method(_interface, in_signature="t")
548
def SetInterval(self, milliseconds):
549
self.interval = datetime.timedelta(0, 0, 0, milliseconds)
550
# Emit D-Bus signal
551
self.PropertyChanged(dbus.String(u"interval"),
552
(dbus.UInt64(self.interval_milliseconds(),
553
variant_level=1)))
554
555
# SetSecret - method
556
@dbus.service.method(_interface, in_signature="ay",
557
byte_arrays=True)
558
def SetSecret(self, secret):
559
"D-Bus setter method"
560
self.secret = str(secret)
561
562
# SetTimeout - method
563
@dbus.service.method(_interface, in_signature="t")
564
def SetTimeout(self, milliseconds):
565
self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
566
# Emit D-Bus signal
567
self.PropertyChanged(dbus.String(u"timeout"),
568
(dbus.UInt64(self.timeout_milliseconds(),
569
variant_level=1)))
570
571
# Enable - method
572
Enable = dbus.service.method(_interface)(enable)
573
Enable.__name__ = "Enable"
574
575
# StartChecker - method
576
@dbus.service.method(_interface)
577
def StartChecker(self):
578
"D-Bus method"
579
self.start_checker()
580
581
# Disable - method
582
@dbus.service.method(_interface)
583
def Disable(self):
584
"D-Bus method"
585
self.disable()
586
587
# StopChecker - method
588
StopChecker = dbus.service.method(_interface)(stop_checker)
589
StopChecker.__name__ = "StopChecker"
590
591
del _interface
255
return now < (self.last_seen + self.timeout)
592
256
593
257
594
258
def peer_certificate(session):
595
"Return the peer's OpenPGP certificate as a bytestring"
596
259
# If not an OpenPGP certificate...
597
if (gnutls.library.functions
598
.gnutls_certificate_type_get(session._c_object)
599
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
260
if gnutls.library.functions.gnutls_certificate_type_get\
261
(session._c_object) \
262
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP:
600
263
# ...do the normal thing
601
264
return session.peer_certificate
602
265
list_size = ctypes.c_uint()
603
cert_list = (gnutls.library.functions
604
.gnutls_certificate_get_peers
605
(session._c_object, ctypes.byref(list_size)))
266
cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
267
(session._c_object, ctypes.byref(list_size))
606
268
if list_size.value == 0:
607
269
return None
608
270
cert = cert_list[0]
610
272
611
273
612
274
def fingerprint(openpgp):
613
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
614
# New GnuTLS "datum" with the OpenPGP public key
615
datum = (gnutls.library.types
616
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
617
ctypes.POINTER
618
(ctypes.c_ubyte)),
619
ctypes.c_uint(len(openpgp))))
620
275
# New empty GnuTLS certificate
621
276
crt = gnutls.library.types.gnutls_openpgp_crt_t()
622
(gnutls.library.functions
623
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
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)))
624
284
# Import the OpenPGP public key into the certificate
625
(gnutls.library.functions
626
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
627
gnutls.library.constants
628
.GNUTLS_OPENPGP_FMT_RAW))
629
# Verify the self signature in the key
630
crtverify = ctypes.c_uint()
631
(gnutls.library.functions
632
.gnutls_openpgp_crt_verify_self(crt, 0, ctypes.byref(crtverify)))
633
if crtverify.value != 0:
634
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
635
raise gnutls.errors.CertificateSecurityError("Verify failed")
285
ret = gnutls.library.functions.gnutls_openpgp_crt_import\
286
(crt,
287
ctypes.byref(datum),
288
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
636
289
# New buffer for the fingerprint
637
buf = ctypes.create_string_buffer(20)
638
buf_len = ctypes.c_size_t()
290
buffer = ctypes.create_string_buffer(20)
291
buffer_length = ctypes.c_size_t()
639
292
# Get the fingerprint from the certificate into the buffer
640
(gnutls.library.functions
641
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
642
ctypes.byref(buf_len)))
293
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
294
(crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
643
295
# Deinit the certificate
644
296
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
645
297
# Convert the buffer to a Python bytestring
646
fpr = ctypes.string_at(buf, buf_len.value)
298
fpr = ctypes.string_at(buffer, buffer_length.value)
647
299
# Convert the bytestring to hexadecimal notation
648
300
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
649
301
return hex_fpr
650
302
651
303
652
class TCP_handler(SocketServer.BaseRequestHandler, object):
304
class tcp_handler(SocketServer.BaseRequestHandler, object):
653
305
"""A TCP request handler class.
654
306
Instantiated by IPv6_TCPServer for each request to handle it.
655
307
Note: This will run in its own forked process."""
656
308
657
309
def handle(self):
658
logger.info(u"TCP connection from: %s",
659
unicode(self.client_address))
660
session = (gnutls.connection
661
.ClientSession(self.request,
662
gnutls.connection
663
.X509Credentials()))
664
665
line = self.request.makefile().readline()
666
logger.debug(u"Protocol version: %r", line)
667
try:
668
if int(line.strip().split()[0]) > 1:
669
raise RuntimeError
670
except (ValueError, IndexError, RuntimeError), error:
671
logger.error(u"Unknown protocol version: %s", error)
672
return
673
674
# Note: gnutls.connection.X509Credentials is really a generic
675
# GnuTLS certificate credentials object so long as no X.509
676
# keys are added to it. Therefore, we can use it here despite
677
# using OpenPGP certificates.
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())
678
315
679
316
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
680
317
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
681
318
# "+DHE-DSS"))
682
# Use a fallback default, since this MUST be set.
683
priority = self.server.settings.get("priority", "NORMAL")
684
(gnutls.library.functions
685
.gnutls_priority_set_direct(session._c_object,
686
priority, None))
319
priority = "SECURE256"
320
321
gnutls.library.functions.gnutls_priority_set_direct\
322
(session._c_object, priority, None);
687
323
688
324
try:
689
325
session.handshake()
690
326
except gnutls.errors.GNUTLSError, error:
691
logger.warning(u"Handshake failed: %s", error)
327
logger.debug(u"Handshake failed: %s", error)
692
328
# Do not run session.bye() here: the session is not
693
329
# established. Just abandon the request.
694
330
return
695
331
try:
696
332
fpr = fingerprint(peer_certificate(session))
697
333
except (TypeError, gnutls.errors.GNUTLSError), error:
698
logger.warning(u"Bad certificate: %s", error)
334
logger.debug(u"Bad certificate: %s", error)
699
335
session.bye()
700
336
return
701
337
logger.debug(u"Fingerprint: %s", fpr)
702
for c in self.server.clients:
338
client = None
339
for c in clients:
703
340
if c.fingerprint == fpr:
704
341
client = c
705
342
break
706
else:
707
logger.warning(u"Client not found for fingerprint: %s",
708
fpr)
709
session.bye()
710
return
711
343
# Have to check if client.still_valid(), since it is possible
712
344
# that the client timed out while establishing the GnuTLS
713
345
# session.
714
if not client.still_valid():
715
logger.warning(u"Client %(name)s is invalid",
716
vars(client))
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)
717
353
session.bye()
718
354
return
719
## This won't work here, since we're in a fork.
720
# client.bump_timeout()
721
355
sent_size = 0
722
356
while sent_size < len(client.secret):
723
357
sent = session.send(client.secret[sent_size:])
728
362
session.bye()
729
363
730
364
731
class IPv6_TCPServer(SocketServer.ForkingMixIn,
732
SocketServer.TCPServer, object):
365
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
733
366
"""IPv6 TCP server. Accepts 'None' as address and/or port.
734
367
Attributes:
735
settings: Server settings
368
options: Command line options
736
369
clients: Set() of Client objects
737
enabled: Boolean; whether this server is activated yet
738
370
"""
739
371
address_family = socket.AF_INET6
740
372
def __init__(self, *args, **kwargs):
741
if "settings" in kwargs:
742
self.settings = kwargs["settings"]
743
del kwargs["settings"]
373
if "options" in kwargs:
374
self.options = kwargs["options"]
375
del kwargs["options"]
744
376
if "clients" in kwargs:
745
377
self.clients = kwargs["clients"]
746
378
del kwargs["clients"]
747
self.enabled = False
748
super(IPv6_TCPServer, self).__init__(*args, **kwargs)
379
return super(type(self), self).__init__(*args, **kwargs)
749
380
def server_bind(self):
750
381
"""This overrides the normal server_bind() function
751
382
to bind to an interface if one was specified, and also NOT to
752
383
bind to an address or port if they were not specified."""
753
if self.settings["interface"]:
754
# 25 is from /usr/include/asm-i486/socket.h
755
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
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
756
388
try:
757
389
self.socket.setsockopt(socket.SOL_SOCKET,
758
SO_BINDTODEVICE,
759
self.settings["interface"])
390
socket.SO_BINDTODEVICE,
391
self.options.interface)
760
392
except socket.error, error:
761
393
if error[0] == errno.EPERM:
762
logger.error(u"No permission to"
763
u" bind to interface %s",
764
self.settings["interface"])
394
logger.warning(u"No permission to"
395
u" bind to interface %s",
396
self.options.interface)
765
397
else:
766
398
raise error
767
399
# Only bind(2) the socket if we really need to.
770
402
in6addr_any = "::"
771
403
self.server_address = (in6addr_any,
772
404
self.server_address[1])
773
elif not self.server_address[1]:
405
elif self.server_address[1] is None:
774
406
self.server_address = (self.server_address[0],
775
407
0)
776
# if self.settings["interface"]:
777
# self.server_address = (self.server_address[0],
778
# 0, # port
779
# 0, # flowinfo
780
# if_nametoindex
781
# (self.settings
782
# ["interface"]))
783
return super(IPv6_TCPServer, self).server_bind()
784
def server_activate(self):
785
if self.enabled:
786
return super(IPv6_TCPServer, self).server_activate()
787
def enable(self):
788
self.enabled = True
408
return super(type(self), self).server_bind()
789
409
790
410
791
411
def string_to_delta(interval):
801
421
datetime.timedelta(1)
802
422
>>> string_to_delta(u'1w')
803
423
datetime.timedelta(7)
804
>>> string_to_delta('5m 30s')
805
datetime.timedelta(0, 330)
806
424
"""
807
timevalue = datetime.timedelta(0)
808
for s in interval.split():
809
try:
810
suffix = unicode(s[-1])
811
value = int(s[:-1])
812
if suffix == u"d":
813
delta = datetime.timedelta(value)
814
elif suffix == u"s":
815
delta = datetime.timedelta(0, value)
816
elif suffix == u"m":
817
delta = datetime.timedelta(0, 0, 0, 0, value)
818
elif suffix == u"h":
819
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
820
elif suffix == u"w":
821
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
822
else:
823
raise ValueError
824
except (ValueError, IndexError):
425
try:
426
suffix=unicode(interval[-1])
427
value=int(interval[:-1])
428
if suffix == u"d":
429
delta = datetime.timedelta(value)
430
elif suffix == u"s":
431
delta = datetime.timedelta(0, value)
432
elif suffix == u"m":
433
delta = datetime.timedelta(0, 0, 0, 0, value)
434
elif suffix == u"h":
435
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
436
elif suffix == u"w":
437
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
438
else:
825
439
raise ValueError
826
timevalue += delta
827
return timevalue
440
except (ValueError, IndexError):
441
raise ValueError
442
return delta
443
444
445
def add_service():
446
"""From the Avahi server example code"""
447
global group, serviceName, serviceType, servicePort, serviceTXT, \
448
domain, host
449
if group is None:
450
group = dbus.Interface(
451
bus.get_object( avahi.DBUS_NAME,
452
server.EntryGroupNew()),
453
avahi.DBUS_INTERFACE_ENTRY_GROUP)
454
group.connect_to_signal('StateChanged',
455
entry_group_state_changed)
456
logger.debug(u"Adding service '%s' of type '%s' ...",
457
serviceName, serviceType)
458
459
group.AddService(
460
serviceInterface, # interface
461
avahi.PROTO_INET6, # protocol
462
dbus.UInt32(0), # flags
463
serviceName, serviceType,
464
domain, host,
465
dbus.UInt16(servicePort),
466
avahi.string_array_to_txt_array(serviceTXT))
467
group.Commit()
468
469
470
def remove_service():
471
"""From the Avahi server example code"""
472
global group
473
474
if not group is None:
475
group.Reset()
828
476
829
477
830
478
def server_state_changed(state):
831
"""Derived from the Avahi example code"""
479
"""From the Avahi server example code"""
832
480
if state == avahi.SERVER_COLLISION:
833
logger.error(u"Zeroconf server name collision")
834
service.remove()
481
logger.warning(u"Server name collision")
482
remove_service()
835
483
elif state == avahi.SERVER_RUNNING:
836
service.add()
484
add_service()
837
485
838
486
839
487
def entry_group_state_changed(state, error):
840
"""Derived from the Avahi example code"""
841
logger.debug(u"Avahi state change: %i", state)
488
"""From the Avahi server example code"""
489
global serviceName, server, rename_count
490
491
logger.debug(u"state change: %i", state)
842
492
843
493
if state == avahi.ENTRY_GROUP_ESTABLISHED:
844
logger.debug(u"Zeroconf service established.")
494
logger.debug(u"Service established.")
845
495
elif state == avahi.ENTRY_GROUP_COLLISION:
846
logger.warning(u"Zeroconf service name collision.")
847
service.rename()
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()
848
510
elif state == avahi.ENTRY_GROUP_FAILURE:
849
logger.critical(u"Avahi: Error in group state changed %s",
850
unicode(error))
851
raise AvahiGroupError(u"State changed: %s" % unicode(error))
511
logger.error(u"Error in group state changed %s",
512
unicode(error))
513
main_loop.quit()
514
return
515
852
516
853
517
def if_nametoindex(interface):
854
"""Call the C function if_nametoindex(), or equivalent"""
855
global if_nametoindex
518
"""Call the C function if_nametoindex()"""
856
519
try:
857
if_nametoindex = (ctypes.cdll.LoadLibrary
858
(ctypes.util.find_library("c"))
859
.if_nametoindex)
520
libc = ctypes.cdll.LoadLibrary("libc.so.6")
521
return libc.if_nametoindex(interface)
860
522
except (OSError, AttributeError):
861
523
if "struct" not in sys.modules:
862
524
import struct
863
525
if "fcntl" not in sys.modules:
864
526
import fcntl
865
def if_nametoindex(interface):
866
"Get an interface index the hard way, i.e. using fcntl()"
867
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
868
with closing(socket.socket()) as s:
869
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
870
struct.pack("16s16x", interface))
871
interface_index = struct.unpack("I", ifreq[16:20])[0]
872
return interface_index
873
return if_nametoindex(interface)
874
875
876
def daemon(nochdir = False, noclose = False):
877
"""See daemon(3). Standard BSD Unix function.
878
This should really exist as os.daemon, but it doesn't (yet)."""
879
if os.fork():
880
sys.exit()
881
os.setsid()
882
if not nochdir:
883
os.chdir("/")
884
if os.fork():
885
sys.exit()
886
if not noclose:
887
# Close all standard open file descriptors
888
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
889
if not stat.S_ISCHR(os.fstat(null).st_mode):
890
raise OSError(errno.ENODEV,
891
"/dev/null not a character device")
892
os.dup2(null, sys.stdin.fileno())
893
os.dup2(null, sys.stdout.fileno())
894
os.dup2(null, sys.stderr.fileno())
895
if null > 2:
896
os.close(null)
897
898
899
def main():
900
parser = optparse.OptionParser(version = "%%prog %s" % version)
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()
901
538
parser.add_option("-i", "--interface", type="string",
902
metavar="IF", help="Bind to interface IF")
903
parser.add_option("-a", "--address", type="string",
904
help="Address to listen for requests on")
905
parser.add_option("-p", "--port", type="int",
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,
906
554
help="Port number to receive requests on")
907
parser.add_option("--check", action="store_true",
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,
908
562
help="Run self-test")
909
parser.add_option("--debug", action="store_true",
910
help="Debug mode; run in foreground and log to"
911
" terminal")
912
parser.add_option("--priority", type="string", help="GnuTLS"
913
" priority string (see GnuTLS documentation)")
914
parser.add_option("--servicename", type="string", metavar="NAME",
915
help="Zeroconf service name")
916
parser.add_option("--configdir", type="string",
917
default="/etc/mandos", metavar="DIR",
918
help="Directory to search for configuration"
919
" files")
920
parser.add_option("--no-dbus", action="store_false",
921
dest="use_dbus",
922
help="Do not provide D-Bus system bus"
923
" interface")
924
options = parser.parse_args()[0]
563
parser.add_option("--debug", action="store_true", default=False,
564
help="Debug mode")
565
(options, args) = parser.parse_args()
925
566
926
567
if options.check:
927
568
import doctest
928
569
doctest.testmod()
929
570
sys.exit()
930
571
931
# Default values for config file for server-global settings
932
server_defaults = { "interface": "",
933
"address": "",
934
"port": "",
935
"debug": "False",
936
"priority":
937
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
938
"servicename": "Mandos",
939
"use_dbus": "True",
940
}
941
942
# Parse config file for server-global settings
943
server_config = ConfigParser.SafeConfigParser(server_defaults)
944
del server_defaults
945
server_config.read(os.path.join(options.configdir, "mandos.conf"))
946
# Convert the SafeConfigParser object to a dict
947
server_settings = server_config.defaults()
948
# Use getboolean on the boolean config options
949
server_settings["debug"] = (server_config.getboolean
950
("DEFAULT", "debug"))
951
server_settings["use_dbus"] = (server_config.getboolean
952
("DEFAULT", "use_dbus"))
953
del server_config
954
955
# Override the settings from the config file with command line
956
# options, if set.
957
for option in ("interface", "address", "port", "debug",
958
"priority", "servicename", "configdir",
959
"use_dbus"):
960
value = getattr(options, option)
961
if value is not None:
962
server_settings[option] = value
963
del options
964
# Now we have our good server settings in "server_settings"
965
966
# For convenience
967
debug = server_settings["debug"]
968
use_dbus = server_settings["use_dbus"]
969
970
if not debug:
971
syslogger.setLevel(logging.WARNING)
972
console.setLevel(logging.WARNING)
973
974
if server_settings["servicename"] != "Mandos":
975
syslogger.setFormatter(logging.Formatter
976
('Mandos (%s): %%(levelname)s:'
977
' %%(message)s'
978
% server_settings["servicename"]))
979
980
# Parse config file with clients
981
client_defaults = { "timeout": "1h",
982
"interval": "5m",
983
"checker": "fping -q -- %%(host)s",
984
"host": "",
985
}
986
client_config = ConfigParser.SafeConfigParser(client_defaults)
987
client_config.read(os.path.join(server_settings["configdir"],
988
"clients.conf"))
989
990
clients = Set()
991
tcp_server = IPv6_TCPServer((server_settings["address"],
992
server_settings["port"]),
993
TCP_handler,
994
settings=server_settings,
995
clients=clients)
996
pidfilename = "/var/run/mandos.pid"
997
try:
998
pidfile = open(pidfilename, "w")
999
except IOError, error:
1000
logger.error("Could not open file %r", pidfilename)
1001
1002
try:
1003
uid = pwd.getpwnam("_mandos").pw_uid
1004
gid = pwd.getpwnam("_mandos").pw_gid
1005
except KeyError:
1006
try:
1007
uid = pwd.getpwnam("mandos").pw_uid
1008
gid = pwd.getpwnam("mandos").pw_gid
1009
except KeyError:
1010
try:
1011
uid = pwd.getpwnam("nobody").pw_uid
1012
gid = pwd.getpwnam("nogroup").pw_gid
1013
except KeyError:
1014
uid = 65534
1015
gid = 65534
1016
try:
1017
os.setuid(uid)
1018
os.setgid(gid)
1019
except OSError, error:
1020
if error[0] != errno.EPERM:
1021
raise error
1022
1023
global service
1024
service = AvahiService(name = server_settings["servicename"],
1025
servicetype = "_mandos._tcp", )
1026
if server_settings["interface"]:
1027
service.interface = (if_nametoindex
1028
(server_settings["interface"]))
1029
1030
global main_loop
1031
global bus
1032
global server
1033
# 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
1034
589
DBusGMainLoop(set_as_default=True )
1035
590
main_loop = gobject.MainLoop()
1036
591
bus = dbus.SystemBus()
1037
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
1038
avahi.DBUS_PATH_SERVER),
1039
avahi.DBUS_INTERFACE_SERVER)
592
server = dbus.Interface(
593
bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
594
avahi.DBUS_INTERFACE_SERVER )
1040
595
# End of Avahi example code
1041
if use_dbus:
1042
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
1043
1044
clients.update(Set(Client(name = section,
1045
config
1046
= dict(client_config.items(section)),
1047
use_dbus = use_dbus)
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))))
1048
610
for section in client_config.sections()))
1049
if not clients:
1050
logger.warning(u"No clients defined")
1051
1052
if debug:
1053
# Redirect stdin so all checkers get /dev/null
1054
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1055
os.dup2(null, sys.stdin.fileno())
1056
if null > 2:
1057
os.close(null)
1058
else:
1059
# No console logging
1060
logger.removeHandler(console)
1061
# Close all input and output, do double fork, etc.
1062
daemon()
1063
1064
try:
1065
pid = os.getpid()
1066
pidfile.write(str(pid) + "\n")
1067
pidfile.close()
1068
del pidfile
1069
except IOError:
1070
logger.error(u"Could not write to file %r with PID %d",
1071
pidfilename, pid)
1072
except NameError:
1073
# "pidfile" was never created
1074
pass
1075
del pidfilename
1076
1077
def cleanup():
1078
"Cleanup function; run on exit"
1079
global group
1080
# From the Avahi example code
1081
if not group is None:
1082
group.Free()
1083
group = None
1084
# End of Avahi example code
1085
1086
while clients:
1087
client = clients.pop()
1088
client.disable_hook = None
1089
client.disable()
1090
1091
atexit.register(cleanup)
1092
1093
if not debug:
1094
signal.signal(signal.SIGINT, signal.SIG_IGN)
1095
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1096
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1097
1098
if use_dbus:
1099
class MandosServer(dbus.service.Object):
1100
"""A D-Bus proxy object"""
1101
def __init__(self):
1102
dbus.service.Object.__init__(self, bus, "/")
1103
_interface = u"se.bsnet.fukt.Mandos"
1104
1105
@dbus.service.signal(_interface, signature="oa{sv}")
1106
def ClientAdded(self, objpath, properties):
1107
"D-Bus signal"
1108
pass
1109
1110
@dbus.service.signal(_interface, signature="os")
1111
def ClientRemoved(self, objpath, name):
1112
"D-Bus signal"
1113
pass
1114
1115
@dbus.service.method(_interface, out_signature="ao")
1116
def GetAllClients(self):
1117
return dbus.Array(c.dbus_object_path for c in clients)
1118
1119
@dbus.service.method(_interface, out_signature="a{oa{sv}}")
1120
def GetAllClientsWithProperties(self):
1121
return dbus.Dictionary(
1122
((c.dbus_object_path, c.GetAllProperties())
1123
for c in clients),
1124
signature="oa{sv}")
1125
1126
@dbus.service.method(_interface, in_signature="o")
1127
def RemoveClient(self, object_path):
1128
for c in clients:
1129
if c.dbus_object_path == object_path:
1130
clients.remove(c)
1131
# Don't signal anything except ClientRemoved
1132
c.use_dbus = False
1133
c.disable()
1134
# Emit D-Bus signal
1135
self.ClientRemoved(object_path, c.name)
1136
return
1137
raise KeyError
1138
1139
del _interface
1140
1141
mandos_server = MandosServer()
1142
1143
611
for client in clients:
1144
if use_dbus:
1145
# Emit D-Bus signal
1146
mandos_server.ClientAdded(client.dbus_object_path,
1147
client.GetAllProperties())
1148
client.enable()
1149
1150
tcp_server.enable()
1151
tcp_server.server_activate()
1152
1153
# Find out what port we got
1154
service.port = tcp_server.socket.getsockname()[1]
1155
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
1156
u" scope_id %d" % tcp_server.socket.getsockname())
1157
1158
#service.interface = tcp_server.socket.getsockname()[3]
1159
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)
1160
634
try:
1161
# From the Avahi example code
1162
server.connect_to_signal("StateChanged", server_state_changed)
1163
try:
1164
server_state_changed(server.GetState())
1165
except dbus.exceptions.DBusException, error:
1166
logger.critical(u"DBusException: %s", error)
1167
sys.exit(1)
1168
# End of Avahi example code
1169
1170
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
1171
lambda *args, **kwargs:
1172
(tcp_server.handle_request
1173
(*args[2:], **kwargs) or True))
1174
1175
logger.debug(u"Starting main loop")
1176
635
main_loop.run()
1177
except AvahiError, error:
1178
logger.critical(u"AvahiError: %s", error)
1179
sys.exit(1)
1180
636
except KeyboardInterrupt:
1181
if debug:
1182
print
637
print
638
639
# Cleanup here
1183
640
1184
if __name__ == '__main__':
1185
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