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- Committer: Teddy Hogeborn
- Date: 2009-01-18 06:41:57 UTC
- Revision ID: teddy@fukt.bsnet.se-20090118064157-8o4oia1y0t8di0xj
* debian/mandos-client.lintian-overrides: Remove override for
unbreakable line in
plugin-runner manual page.
* plugin-runner.xml (EXAMPLES): Make long command line more breakable.
unbreakable line in
plugin-runner manual page.
* plugin-runner.xml (EXAMPLES): Make long command line more breakable.
- files added:
- .bzr-builddeb
- debian
- debian/po
- files removed:
- ca.pem
- files renamed:
- mandos-clients.conf => clients.conf
- server.py => mandos
- plugbasedclient.c => plugin-runner.c
- plugins.d/mandosclient.c => plugins.d/mandos-client.c
- plugins.d/passprompt.c => plugins.d/password-prompt.c
- files modified:
- Makefile
added
removed
mandos
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
#
2
33
3
from __future__ import division
34
from __future__ import division, with_statement, absolute_import
4
35
5
36
import SocketServer
6
37
import socket
7
import select
8
from optparse import OptionParser
38
import optparse
9
39
import datetime
10
40
import errno
11
41
import gnutls.crypto
21
51
import signal
22
52
from sets import Set
23
53
import subprocess
54
import atexit
55
import stat
56
import logging
57
import logging.handlers
58
import pwd
59
from contextlib import closing
24
60
25
61
import dbus
62
import dbus.service
26
63
import gobject
27
64
import avahi
28
65
from dbus.mainloop.glib import DBusGMainLoop
29
66
import ctypes
30
31
import logging
32
import logging.handlers
33
34
# logghandler.setFormatter(logging.Formatter('%(levelname)s %(message)s')
67
import ctypes.util
68
69
version = "1.0.5"
35
70
36
71
logger = logging.Logger('mandos')
37
logger.addHandler(logging.handlers.SysLogHandler(facility = logging.handlers.SysLogHandler.LOG_DAEMON))
38
39
# This variable is used to optionally bind to a specified interface.
40
# It is a global variable to fit in with the other variables from the
41
# Avahi server example code.
42
serviceInterface = avahi.IF_UNSPEC
43
# From the Avahi server example code:
44
serviceName = "Mandos"
45
serviceType = "_mandos._tcp" # http://www.dns-sd.org/ServiceTypes.html
46
servicePort = None # Not known at startup
47
serviceTXT = [] # TXT record for the service
48
domain = "" # Domain to publish on, default to .local
49
host = "" # Host to publish records for, default to localhost
50
group = None #our entry group
51
rename_count = 12 # Counter so we only rename after collisions a
52
# sensible number of times
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
53
170
# End of Avahi example code
54
171
55
172
56
class Client(object):
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):
57
179
"""A representation of a client host served by this server.
58
180
Attributes:
59
name: string; from the config file, used in log messages
181
name: string; from the config file, used in log messages
60
182
fingerprint: string (40 or 32 hexadecimal digits); used to
61
183
uniquely identify the client
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.
184
secret: bytestring; sent verbatim (over TLS) to client
185
host: string; available for use by the checker command
186
created: datetime.datetime(); (UTC) object creation
187
last_enabled: datetime.datetime(); (UTC)
188
enabled: bool()
189
last_checked_ok: datetime.datetime(); (UTC) or None
190
timeout: datetime.timedelta(); How long from last_checked_ok
191
until this client is invalid
192
interval: datetime.timedelta(); How often to start a new checker
193
disable_hook: If set, called by disable() as disable_hook(self)
194
checker: subprocess.Popen(); a running checker process used
195
to see if the client lives.
196
'None' if no process is running.
73
197
checker_initiator_tag: a gobject event source tag, or None
74
stop_initiator_tag: - '' -
198
disable_initiator_tag: - '' -
75
199
checker_callback_tag: - '' -
76
200
checker_command: string; External command which is run to check if
77
client lives. %()s expansions are done at
201
client lives. %() expansions are done at
78
202
runtime with vars(self) as dict, so that for
79
203
instance %(name)s can be used in the command.
80
Private attibutes:
81
_timeout: Real variable for 'timeout'
82
_interval: Real variable for 'interval'
83
_timeout_milliseconds: Used by gobject.timeout_add()
84
_interval_milliseconds: - '' -
204
use_dbus: bool(); Whether to provide D-Bus interface and signals
205
dbus_object_path: dbus.ObjectPath ; only set if self.use_dbus
85
206
"""
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):
207
def timeout_milliseconds(self):
208
"Return the 'timeout' attribute in milliseconds"
209
return ((self.timeout.days * 24 * 60 * 60 * 1000)
210
+ (self.timeout.seconds * 1000)
211
+ (self.timeout.microseconds // 1000))
212
213
def interval_milliseconds(self):
214
"Return the 'interval' attribute in milliseconds"
215
return ((self.interval.days * 24 * 60 * 60 * 1000)
216
+ (self.interval.seconds * 1000)
217
+ (self.interval.microseconds // 1000))
218
219
def __init__(self, name = None, disable_hook=None, config=None,
220
use_dbus=True):
221
"""Note: the 'checker' key in 'config' sets the
222
'checker_command' attribute and *not* the 'checker'
223
attribute."""
112
224
self.name = name
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
225
if config is None:
226
config = {}
227
logger.debug(u"Creating client %r", self.name)
228
self.use_dbus = use_dbus
229
if self.use_dbus:
230
self.dbus_object_path = (dbus.ObjectPath
231
("/Mandos/clients/"
232
+ self.name.replace(".", "_")))
233
dbus.service.Object.__init__(self, bus,
234
self.dbus_object_path)
235
# Uppercase and remove spaces from fingerprint for later
236
# comparison purposes with return value from the fingerprint()
237
# function
238
self.fingerprint = (config["fingerprint"].upper()
239
.replace(u" ", u""))
240
logger.debug(u" Fingerprint: %s", self.fingerprint)
241
if "secret" in config:
242
self.secret = config["secret"].decode(u"base64")
243
elif "secfile" in config:
244
with closing(open(os.path.expanduser
245
(os.path.expandvars
246
(config["secfile"])))) as secfile:
247
self.secret = secfile.read()
248
else:
249
raise TypeError(u"No secret or secfile for client %s"
250
% self.name)
251
self.host = config.get("host", "")
252
self.created = datetime.datetime.utcnow()
253
self.enabled = False
254
self.last_enabled = None
255
self.last_checked_ok = None
256
self.timeout = string_to_delta(config["timeout"])
257
self.interval = string_to_delta(config["interval"])
258
self.disable_hook = disable_hook
138
259
self.checker = None
139
260
self.checker_initiator_tag = None
140
self.stop_initiator_tag = None
261
self.disable_initiator_tag = None
141
262
self.checker_callback_tag = None
142
self.check_command = checker
143
def start(self):
144
"""Start this clients checker and timeout hooks"""
263
self.checker_command = config["checker"]
264
265
def enable(self):
266
"""Start this client's checker and timeout hooks"""
267
self.last_enabled = datetime.datetime.utcnow()
145
268
# Schedule a new checker to be started an 'interval' from now,
146
269
# and every interval from then on.
147
self.checker_initiator_tag = gobject.timeout_add\
148
(self._interval_milliseconds,
149
self.start_checker)
270
self.checker_initiator_tag = (gobject.timeout_add
271
(self.interval_milliseconds(),
272
self.start_checker))
150
273
# Also start a new checker *right now*.
151
274
self.start_checker()
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:
275
# Schedule a disable() when 'timeout' has passed
276
self.disable_initiator_tag = (gobject.timeout_add
277
(self.timeout_milliseconds(),
278
self.disable))
279
self.enabled = True
280
if self.use_dbus:
281
# Emit D-Bus signals
282
self.PropertyChanged(dbus.String(u"enabled"),
283
dbus.Boolean(True, variant_level=1))
284
self.PropertyChanged(dbus.String(u"last_enabled"),
285
(_datetime_to_dbus(self.last_enabled,
286
variant_level=1)))
287
288
def disable(self):
289
"""Disable this client."""
290
if not getattr(self, "enabled", False):
291
return False
292
logger.info(u"Disabling client %s", self.name)
293
if getattr(self, "disable_initiator_tag", False):
294
gobject.source_remove(self.disable_initiator_tag)
295
self.disable_initiator_tag = None
296
if getattr(self, "checker_initiator_tag", False):
166
297
gobject.source_remove(self.checker_initiator_tag)
167
298
self.checker_initiator_tag = None
168
299
self.stop_checker()
169
if self.stop_hook:
170
self.stop_hook(self)
300
if self.disable_hook:
301
self.disable_hook(self)
302
self.enabled = False
303
if self.use_dbus:
304
# Emit D-Bus signal
305
self.PropertyChanged(dbus.String(u"enabled"),
306
dbus.Boolean(False, variant_level=1))
171
307
# Do not run this again if called by a gobject.timeout_add
172
308
return False
309
173
310
def __del__(self):
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):
311
self.disable_hook = None
312
self.disable()
313
314
def checker_callback(self, pid, condition, command):
185
315
"""The checker has completed, so take appropriate actions."""
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):
316
self.checker_callback_tag = None
317
self.checker = None
318
if self.use_dbus:
319
# Emit D-Bus signal
320
self.PropertyChanged(dbus.String(u"checker_running"),
321
dbus.Boolean(False, variant_level=1))
322
if (os.WIFEXITED(condition)
323
and (os.WEXITSTATUS(condition) == 0)):
324
logger.info(u"Checker for %(name)s succeeded",
325
vars(self))
326
if self.use_dbus:
327
# Emit D-Bus signal
328
self.CheckerCompleted(dbus.Boolean(True),
329
dbus.UInt16(condition),
330
dbus.String(command))
331
self.bump_timeout()
332
elif not os.WIFEXITED(condition):
197
333
logger.warning(u"Checker for %(name)s crashed?",
198
334
vars(self))
335
if self.use_dbus:
336
# Emit D-Bus signal
337
self.CheckerCompleted(dbus.Boolean(False),
338
dbus.UInt16(condition),
339
dbus.String(command))
199
340
else:
200
logger.debug(u"Checker for %(name)s failed",
201
vars(self))
202
self.checker = None
203
self.checker_callback_tag = None
341
logger.info(u"Checker for %(name)s failed",
342
vars(self))
343
if self.use_dbus:
344
# Emit D-Bus signal
345
self.CheckerCompleted(dbus.Boolean(False),
346
dbus.UInt16(condition),
347
dbus.String(command))
348
349
def bump_timeout(self):
350
"""Bump up the timeout for this client.
351
This should only be called when the client has been seen,
352
alive and well.
353
"""
354
self.last_checked_ok = datetime.datetime.utcnow()
355
gobject.source_remove(self.disable_initiator_tag)
356
self.disable_initiator_tag = (gobject.timeout_add
357
(self.timeout_milliseconds(),
358
self.disable))
359
if self.use_dbus:
360
# Emit D-Bus signal
361
self.PropertyChanged(
362
dbus.String(u"last_checked_ok"),
363
(_datetime_to_dbus(self.last_checked_ok,
364
variant_level=1)))
365
204
366
def start_checker(self):
205
367
"""Start a new checker subprocess if one is not running.
206
368
If a checker already exists, leave it running and do
207
369
nothing."""
370
# The reason for not killing a running checker is that if we
371
# did that, then if a checker (for some reason) started
372
# running slowly and taking more than 'interval' time, the
373
# client would inevitably timeout, since no checker would get
374
# a chance to run to completion. If we instead leave running
375
# checkers alone, the checker would have to take more time
376
# than 'timeout' for the client to be declared invalid, which
377
# is as it should be.
208
378
if self.checker is None:
209
logger.debug(u"Starting checker for %s",
210
self.name)
211
379
try:
212
command = self.check_command % self.fqdn
380
# In case checker_command has exactly one % operator
381
command = self.checker_command % self.host
213
382
except TypeError:
383
# Escape attributes for the shell
214
384
escaped_attrs = dict((key, re.escape(str(val)))
215
385
for key, val in
216
386
vars(self).iteritems())
217
387
try:
218
command = self.check_command % escaped_attrs
388
command = self.checker_command % escaped_attrs
219
389
except TypeError, error:
220
logger.critical(u'Could not format string "%s": %s',
221
self.check_command, error)
390
logger.error(u'Could not format string "%s":'
391
u' %s', self.checker_command, error)
222
392
return True # Try again later
223
393
try:
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:
394
logger.info(u"Starting checker %r for %s",
395
command, self.name)
396
# We don't need to redirect stdout and stderr, since
397
# in normal mode, that is already done by daemon(),
398
# and in debug mode we don't want to. (Stdin is
399
# always replaced by /dev/null.)
400
self.checker = subprocess.Popen(command,
401
close_fds=True,
402
shell=True, cwd="/")
403
if self.use_dbus:
404
# Emit D-Bus signal
405
self.CheckerStarted(command)
406
self.PropertyChanged(
407
dbus.String("checker_running"),
408
dbus.Boolean(True, variant_level=1))
409
self.checker_callback_tag = (gobject.child_watch_add
410
(self.checker.pid,
411
self.checker_callback,
412
data=command))
413
except OSError, error:
234
414
logger.error(u"Failed to start subprocess: %s",
235
415
error)
236
416
# Re-run this periodically if run by gobject.timeout_add
237
417
return True
418
238
419
def stop_checker(self):
239
420
"""Force the checker process, if any, to stop."""
240
if not hasattr(self, "checker") or self.checker is None:
421
if self.checker_callback_tag:
422
gobject.source_remove(self.checker_callback_tag)
423
self.checker_callback_tag = None
424
if getattr(self, "checker", None) is None:
241
425
return
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)
426
logger.debug(u"Stopping checker for %(name)s", vars(self))
427
try:
428
os.kill(self.checker.pid, signal.SIGTERM)
429
#os.sleep(0.5)
430
#if self.checker.poll() is None:
431
# os.kill(self.checker.pid, signal.SIGKILL)
432
except OSError, error:
433
if error.errno != errno.ESRCH: # No such process
434
raise
247
435
self.checker = None
248
def still_valid(self, now=None):
436
if self.use_dbus:
437
self.PropertyChanged(dbus.String(u"checker_running"),
438
dbus.Boolean(False, variant_level=1))
439
440
def still_valid(self):
249
441
"""Has the timeout not yet passed for this client?"""
250
if now is None:
251
now = datetime.datetime.now()
252
if self.last_seen is None:
442
if not getattr(self, "enabled", False):
443
return False
444
now = datetime.datetime.utcnow()
445
if self.last_checked_ok is None:
253
446
return now < (self.created + self.timeout)
254
447
else:
255
return now < (self.last_seen + self.timeout)
448
return now < (self.last_checked_ok + self.timeout)
449
450
## D-Bus methods & signals
451
_interface = u"org.mandos_system.Mandos.Client"
452
453
# BumpTimeout - method
454
BumpTimeout = dbus.service.method(_interface)(bump_timeout)
455
BumpTimeout.__name__ = "BumpTimeout"
456
457
# CheckerCompleted - signal
458
@dbus.service.signal(_interface, signature="bqs")
459
def CheckerCompleted(self, success, condition, command):
460
"D-Bus signal"
461
pass
462
463
# CheckerStarted - signal
464
@dbus.service.signal(_interface, signature="s")
465
def CheckerStarted(self, command):
466
"D-Bus signal"
467
pass
468
469
# GetAllProperties - method
470
@dbus.service.method(_interface, out_signature="a{sv}")
471
def GetAllProperties(self):
472
"D-Bus method"
473
return dbus.Dictionary({
474
dbus.String("name"):
475
dbus.String(self.name, variant_level=1),
476
dbus.String("fingerprint"):
477
dbus.String(self.fingerprint, variant_level=1),
478
dbus.String("host"):
479
dbus.String(self.host, variant_level=1),
480
dbus.String("created"):
481
_datetime_to_dbus(self.created, variant_level=1),
482
dbus.String("last_enabled"):
483
(_datetime_to_dbus(self.last_enabled,
484
variant_level=1)
485
if self.last_enabled is not None
486
else dbus.Boolean(False, variant_level=1)),
487
dbus.String("enabled"):
488
dbus.Boolean(self.enabled, variant_level=1),
489
dbus.String("last_checked_ok"):
490
(_datetime_to_dbus(self.last_checked_ok,
491
variant_level=1)
492
if self.last_checked_ok is not None
493
else dbus.Boolean (False, variant_level=1)),
494
dbus.String("timeout"):
495
dbus.UInt64(self.timeout_milliseconds(),
496
variant_level=1),
497
dbus.String("interval"):
498
dbus.UInt64(self.interval_milliseconds(),
499
variant_level=1),
500
dbus.String("checker"):
501
dbus.String(self.checker_command,
502
variant_level=1),
503
dbus.String("checker_running"):
504
dbus.Boolean(self.checker is not None,
505
variant_level=1),
506
}, signature="sv")
507
508
# IsStillValid - method
509
IsStillValid = (dbus.service.method(_interface, out_signature="b")
510
(still_valid))
511
IsStillValid.__name__ = "IsStillValid"
512
513
# PropertyChanged - signal
514
@dbus.service.signal(_interface, signature="sv")
515
def PropertyChanged(self, property, value):
516
"D-Bus signal"
517
pass
518
519
# SetChecker - method
520
@dbus.service.method(_interface, in_signature="s")
521
def SetChecker(self, checker):
522
"D-Bus setter method"
523
self.checker_command = checker
524
# Emit D-Bus signal
525
self.PropertyChanged(dbus.String(u"checker"),
526
dbus.String(self.checker_command,
527
variant_level=1))
528
529
# SetHost - method
530
@dbus.service.method(_interface, in_signature="s")
531
def SetHost(self, host):
532
"D-Bus setter method"
533
self.host = host
534
# Emit D-Bus signal
535
self.PropertyChanged(dbus.String(u"host"),
536
dbus.String(self.host, variant_level=1))
537
538
# SetInterval - method
539
@dbus.service.method(_interface, in_signature="t")
540
def SetInterval(self, milliseconds):
541
self.interval = datetime.timedelta(0, 0, 0, milliseconds)
542
# Emit D-Bus signal
543
self.PropertyChanged(dbus.String(u"interval"),
544
(dbus.UInt64(self.interval_milliseconds(),
545
variant_level=1)))
546
547
# SetSecret - method
548
@dbus.service.method(_interface, in_signature="ay",
549
byte_arrays=True)
550
def SetSecret(self, secret):
551
"D-Bus setter method"
552
self.secret = str(secret)
553
554
# SetTimeout - method
555
@dbus.service.method(_interface, in_signature="t")
556
def SetTimeout(self, milliseconds):
557
self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
558
# Emit D-Bus signal
559
self.PropertyChanged(dbus.String(u"timeout"),
560
(dbus.UInt64(self.timeout_milliseconds(),
561
variant_level=1)))
562
563
# Enable - method
564
Enable = dbus.service.method(_interface)(enable)
565
Enable.__name__ = "Enable"
566
567
# StartChecker - method
568
@dbus.service.method(_interface)
569
def StartChecker(self):
570
"D-Bus method"
571
self.start_checker()
572
573
# Disable - method
574
@dbus.service.method(_interface)
575
def Disable(self):
576
"D-Bus method"
577
self.disable()
578
579
# StopChecker - method
580
StopChecker = dbus.service.method(_interface)(stop_checker)
581
StopChecker.__name__ = "StopChecker"
582
583
del _interface
256
584
257
585
258
586
def peer_certificate(session):
587
"Return the peer's OpenPGP certificate as a bytestring"
259
588
# If not an OpenPGP certificate...
260
if gnutls.library.functions.gnutls_certificate_type_get\
261
(session._c_object) \
262
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP:
589
if (gnutls.library.functions
590
.gnutls_certificate_type_get(session._c_object)
591
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
263
592
# ...do the normal thing
264
593
return session.peer_certificate
265
594
list_size = ctypes.c_uint()
266
cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
267
(session._c_object, ctypes.byref(list_size))
595
cert_list = (gnutls.library.functions
596
.gnutls_certificate_get_peers
597
(session._c_object, ctypes.byref(list_size)))
268
598
if list_size.value == 0:
269
599
return None
270
600
cert = cert_list[0]
272
602
273
603
274
604
def fingerprint(openpgp):
605
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
606
# New GnuTLS "datum" with the OpenPGP public key
607
datum = (gnutls.library.types
608
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
609
ctypes.POINTER
610
(ctypes.c_ubyte)),
611
ctypes.c_uint(len(openpgp))))
275
612
# New empty GnuTLS certificate
276
613
crt = gnutls.library.types.gnutls_openpgp_crt_t()
277
gnutls.library.functions.gnutls_openpgp_crt_init\
278
(ctypes.byref(crt))
279
# New GnuTLS "datum" with the OpenPGP public key
280
datum = gnutls.library.types.gnutls_datum_t\
281
(ctypes.cast(ctypes.c_char_p(openpgp),
282
ctypes.POINTER(ctypes.c_ubyte)),
283
ctypes.c_uint(len(openpgp)))
614
(gnutls.library.functions
615
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
284
616
# Import the OpenPGP public key into the certificate
285
ret = gnutls.library.functions.gnutls_openpgp_crt_import\
286
(crt,
287
ctypes.byref(datum),
288
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
617
(gnutls.library.functions
618
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
619
gnutls.library.constants
620
.GNUTLS_OPENPGP_FMT_RAW))
621
# Verify the self signature in the key
622
crtverify = ctypes.c_uint()
623
(gnutls.library.functions
624
.gnutls_openpgp_crt_verify_self(crt, 0, ctypes.byref(crtverify)))
625
if crtverify.value != 0:
626
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
627
raise gnutls.errors.CertificateSecurityError("Verify failed")
289
628
# New buffer for the fingerprint
290
buffer = ctypes.create_string_buffer(20)
291
buffer_length = ctypes.c_size_t()
629
buf = ctypes.create_string_buffer(20)
630
buf_len = ctypes.c_size_t()
292
631
# Get the fingerprint from the certificate into the buffer
293
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
294
(crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
632
(gnutls.library.functions
633
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
634
ctypes.byref(buf_len)))
295
635
# Deinit the certificate
296
636
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
297
637
# Convert the buffer to a Python bytestring
298
fpr = ctypes.string_at(buffer, buffer_length.value)
638
fpr = ctypes.string_at(buf, buf_len.value)
299
639
# Convert the bytestring to hexadecimal notation
300
640
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
301
641
return hex_fpr
302
642
303
643
304
class tcp_handler(SocketServer.BaseRequestHandler, object):
644
class TCP_handler(SocketServer.BaseRequestHandler, object):
305
645
"""A TCP request handler class.
306
646
Instantiated by IPv6_TCPServer for each request to handle it.
307
647
Note: This will run in its own forked process."""
308
648
309
649
def handle(self):
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())
650
logger.info(u"TCP connection from: %s",
651
unicode(self.client_address))
652
session = (gnutls.connection
653
.ClientSession(self.request,
654
gnutls.connection
655
.X509Credentials()))
656
657
line = self.request.makefile().readline()
658
logger.debug(u"Protocol version: %r", line)
659
try:
660
if int(line.strip().split()[0]) > 1:
661
raise RuntimeError
662
except (ValueError, IndexError, RuntimeError), error:
663
logger.error(u"Unknown protocol version: %s", error)
664
return
665
666
# Note: gnutls.connection.X509Credentials is really a generic
667
# GnuTLS certificate credentials object so long as no X.509
668
# keys are added to it. Therefore, we can use it here despite
669
# using OpenPGP certificates.
315
670
316
671
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
317
672
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
318
673
# "+DHE-DSS"))
319
priority = "SECURE256"
320
321
gnutls.library.functions.gnutls_priority_set_direct\
322
(session._c_object, priority, None);
674
# Use a fallback default, since this MUST be set.
675
priority = self.server.settings.get("priority", "NORMAL")
676
(gnutls.library.functions
677
.gnutls_priority_set_direct(session._c_object,
678
priority, None))
323
679
324
680
try:
325
681
session.handshake()
326
682
except gnutls.errors.GNUTLSError, error:
327
logger.debug(u"Handshake failed: %s", error)
683
logger.warning(u"Handshake failed: %s", error)
328
684
# Do not run session.bye() here: the session is not
329
685
# established. Just abandon the request.
330
686
return
331
687
try:
332
688
fpr = fingerprint(peer_certificate(session))
333
689
except (TypeError, gnutls.errors.GNUTLSError), error:
334
logger.debug(u"Bad certificate: %s", error)
690
logger.warning(u"Bad certificate: %s", error)
335
691
session.bye()
336
692
return
337
693
logger.debug(u"Fingerprint: %s", fpr)
338
client = None
339
for c in clients:
694
for c in self.server.clients:
340
695
if c.fingerprint == fpr:
341
696
client = c
342
697
break
698
else:
699
logger.warning(u"Client not found for fingerprint: %s",
700
fpr)
701
session.bye()
702
return
343
703
# Have to check if client.still_valid(), since it is possible
344
704
# that the client timed out while establishing the GnuTLS
345
705
# session.
346
if (not client) or (not client.still_valid()):
347
if client:
348
logger.debug(u"Client %(name)s is invalid",
349
vars(client))
350
else:
351
logger.debug(u"Client not found for fingerprint: %s",
352
fpr)
706
if not client.still_valid():
707
logger.warning(u"Client %(name)s is invalid",
708
vars(client))
353
709
session.bye()
354
710
return
711
## This won't work here, since we're in a fork.
712
# client.bump_timeout()
355
713
sent_size = 0
356
714
while sent_size < len(client.secret):
357
715
sent = session.send(client.secret[sent_size:])
362
720
session.bye()
363
721
364
722
365
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
723
class IPv6_TCPServer(SocketServer.ForkingMixIn,
724
SocketServer.TCPServer, object):
366
725
"""IPv6 TCP server. Accepts 'None' as address and/or port.
367
726
Attributes:
368
options: Command line options
727
settings: Server settings
369
728
clients: Set() of Client objects
729
enabled: Boolean; whether this server is activated yet
370
730
"""
371
731
address_family = socket.AF_INET6
372
732
def __init__(self, *args, **kwargs):
373
if "options" in kwargs:
374
self.options = kwargs["options"]
375
del kwargs["options"]
733
if "settings" in kwargs:
734
self.settings = kwargs["settings"]
735
del kwargs["settings"]
376
736
if "clients" in kwargs:
377
737
self.clients = kwargs["clients"]
378
738
del kwargs["clients"]
379
return super(type(self), self).__init__(*args, **kwargs)
739
self.enabled = False
740
super(IPv6_TCPServer, self).__init__(*args, **kwargs)
380
741
def server_bind(self):
381
742
"""This overrides the normal server_bind() function
382
743
to bind to an interface if one was specified, and also NOT to
383
744
bind to an address or port if they were not specified."""
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
745
if self.settings["interface"]:
746
# 25 is from /usr/include/asm-i486/socket.h
747
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
388
748
try:
389
749
self.socket.setsockopt(socket.SOL_SOCKET,
390
socket.SO_BINDTODEVICE,
391
self.options.interface)
750
SO_BINDTODEVICE,
751
self.settings["interface"])
392
752
except socket.error, error:
393
753
if error[0] == errno.EPERM:
394
logger.warning(u"No permission to"
395
u" bind to interface %s",
396
self.options.interface)
754
logger.error(u"No permission to"
755
u" bind to interface %s",
756
self.settings["interface"])
397
757
else:
398
758
raise error
399
759
# Only bind(2) the socket if we really need to.
402
762
in6addr_any = "::"
403
763
self.server_address = (in6addr_any,
404
764
self.server_address[1])
405
elif self.server_address[1] is None:
765
elif not self.server_address[1]:
406
766
self.server_address = (self.server_address[0],
407
767
0)
408
return super(type(self), self).server_bind()
768
# if self.settings["interface"]:
769
# self.server_address = (self.server_address[0],
770
# 0, # port
771
# 0, # flowinfo
772
# if_nametoindex
773
# (self.settings
774
# ["interface"]))
775
return super(IPv6_TCPServer, self).server_bind()
776
def server_activate(self):
777
if self.enabled:
778
return super(IPv6_TCPServer, self).server_activate()
779
def enable(self):
780
self.enabled = True
409
781
410
782
411
783
def string_to_delta(interval):
421
793
datetime.timedelta(1)
422
794
>>> string_to_delta(u'1w')
423
795
datetime.timedelta(7)
796
>>> string_to_delta('5m 30s')
797
datetime.timedelta(0, 330)
424
798
"""
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:
799
timevalue = datetime.timedelta(0)
800
for s in interval.split():
801
try:
802
suffix = unicode(s[-1])
803
value = int(s[:-1])
804
if suffix == u"d":
805
delta = datetime.timedelta(value)
806
elif suffix == u"s":
807
delta = datetime.timedelta(0, value)
808
elif suffix == u"m":
809
delta = datetime.timedelta(0, 0, 0, 0, value)
810
elif suffix == u"h":
811
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
812
elif suffix == u"w":
813
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
814
else:
815
raise ValueError
816
except (ValueError, IndexError):
439
817
raise ValueError
440
except (ValueError, IndexError):
441
raise ValueError
442
return delta
443
444
445
def add_service():
446
"""From the Avahi server example code"""
447
global group, serviceName, serviceType, servicePort, serviceTXT, \
448
domain, host
449
if group is None:
450
group = dbus.Interface(
451
bus.get_object( avahi.DBUS_NAME,
452
server.EntryGroupNew()),
453
avahi.DBUS_INTERFACE_ENTRY_GROUP)
454
group.connect_to_signal('StateChanged',
455
entry_group_state_changed)
456
logger.debug(u"Adding service '%s' of type '%s' ...",
457
serviceName, serviceType)
458
459
group.AddService(
460
serviceInterface, # interface
461
avahi.PROTO_INET6, # protocol
462
dbus.UInt32(0), # flags
463
serviceName, serviceType,
464
domain, host,
465
dbus.UInt16(servicePort),
466
avahi.string_array_to_txt_array(serviceTXT))
467
group.Commit()
468
469
470
def remove_service():
471
"""From the Avahi server example code"""
472
global group
473
474
if not group is None:
475
group.Reset()
818
timevalue += delta
819
return timevalue
476
820
477
821
478
822
def server_state_changed(state):
479
"""From the Avahi server example code"""
823
"""Derived from the Avahi example code"""
480
824
if state == avahi.SERVER_COLLISION:
481
logger.warning(u"Server name collision")
482
remove_service()
825
logger.error(u"Zeroconf server name collision")
826
service.remove()
483
827
elif state == avahi.SERVER_RUNNING:
484
add_service()
828
service.add()
485
829
486
830
487
831
def entry_group_state_changed(state, error):
488
"""From the Avahi server example code"""
489
global serviceName, server, rename_count
490
491
logger.debug(u"state change: %i", state)
832
"""Derived from the Avahi example code"""
833
logger.debug(u"Avahi state change: %i", state)
492
834
493
835
if state == avahi.ENTRY_GROUP_ESTABLISHED:
494
logger.debug(u"Service established.")
836
logger.debug(u"Zeroconf service established.")
495
837
elif state == avahi.ENTRY_GROUP_COLLISION:
496
497
rename_count = rename_count - 1
498
if rename_count > 0:
499
name = server.GetAlternativeServiceName(name)
500
logger.warning(u"Service name collision, "
501
u"changing name to '%s' ...", name)
502
remove_service()
503
add_service()
504
505
else:
506
logger.error(u"No suitable service name found "
507
u"after %i retries, exiting.",
508
n_rename)
509
main_loop.quit()
838
logger.warning(u"Zeroconf service name collision.")
839
service.rename()
510
840
elif state == avahi.ENTRY_GROUP_FAILURE:
511
logger.error(u"Error in group state changed %s",
512
unicode(error))
513
main_loop.quit()
514
return
515
841
logger.critical(u"Avahi: Error in group state changed %s",
842
unicode(error))
843
raise AvahiGroupError(u"State changed: %s" % unicode(error))
516
844
517
845
def if_nametoindex(interface):
518
"""Call the C function if_nametoindex()"""
846
"""Call the C function if_nametoindex(), or equivalent"""
847
global if_nametoindex
519
848
try:
520
libc = ctypes.cdll.LoadLibrary("libc.so.6")
521
return libc.if_nametoindex(interface)
849
if_nametoindex = (ctypes.cdll.LoadLibrary
850
(ctypes.util.find_library("c"))
851
.if_nametoindex)
522
852
except (OSError, AttributeError):
523
853
if "struct" not in sys.modules:
524
854
import struct
525
855
if "fcntl" not in sys.modules:
526
856
import fcntl
527
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
528
s = socket.socket()
529
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
530
struct.pack("16s16x", interface))
531
s.close()
532
interface_index = struct.unpack("I", ifreq[16:20])[0]
533
return interface_index
534
535
536
if __name__ == '__main__':
537
parser = OptionParser()
857
def if_nametoindex(interface):
858
"Get an interface index the hard way, i.e. using fcntl()"
859
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
860
with closing(socket.socket()) as s:
861
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
862
struct.pack("16s16x", interface))
863
interface_index = struct.unpack("I", ifreq[16:20])[0]
864
return interface_index
865
return if_nametoindex(interface)
866
867
868
def daemon(nochdir = False, noclose = False):
869
"""See daemon(3). Standard BSD Unix function.
870
This should really exist as os.daemon, but it doesn't (yet)."""
871
if os.fork():
872
sys.exit()
873
os.setsid()
874
if not nochdir:
875
os.chdir("/")
876
if os.fork():
877
sys.exit()
878
if not noclose:
879
# Close all standard open file descriptors
880
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
881
if not stat.S_ISCHR(os.fstat(null).st_mode):
882
raise OSError(errno.ENODEV,
883
"/dev/null not a character device")
884
os.dup2(null, sys.stdin.fileno())
885
os.dup2(null, sys.stdout.fileno())
886
os.dup2(null, sys.stderr.fileno())
887
if null > 2:
888
os.close(null)
889
890
891
def main():
892
parser = optparse.OptionParser(version = "%%prog %s" % version)
538
893
parser.add_option("-i", "--interface", type="string",
539
default=None, metavar="IF",
540
help="Bind to interface IF")
541
parser.add_option("--cert", type="string", default="cert.pem",
542
metavar="FILE",
543
help="Public key certificate PEM file to use")
544
parser.add_option("--key", type="string", default="key.pem",
545
metavar="FILE",
546
help="Private key PEM file to use")
547
parser.add_option("--ca", type="string", default="ca.pem",
548
metavar="FILE",
549
help="Certificate Authority certificate PEM file to use")
550
parser.add_option("--crl", type="string", default="crl.pem",
551
metavar="FILE",
552
help="Certificate Revokation List PEM file to use")
553
parser.add_option("-p", "--port", type="int", default=None,
894
metavar="IF", help="Bind to interface IF")
895
parser.add_option("-a", "--address", type="string",
896
help="Address to listen for requests on")
897
parser.add_option("-p", "--port", type="int",
554
898
help="Port number to receive requests on")
555
parser.add_option("--timeout", type="string", # Parsed later
556
default="1h",
557
help="Amount of downtime allowed for clients")
558
parser.add_option("--interval", type="string", # Parsed later
559
default="5m",
560
help="How often to check that a client is up")
561
parser.add_option("--check", action="store_true", default=False,
899
parser.add_option("--check", action="store_true",
562
900
help="Run self-test")
563
parser.add_option("--debug", action="store_true", default=False,
564
help="Debug mode")
565
(options, args) = parser.parse_args()
901
parser.add_option("--debug", action="store_true",
902
help="Debug mode; run in foreground and log to"
903
" terminal")
904
parser.add_option("--priority", type="string", help="GnuTLS"
905
" priority string (see GnuTLS documentation)")
906
parser.add_option("--servicename", type="string", metavar="NAME",
907
help="Zeroconf service name")
908
parser.add_option("--configdir", type="string",
909
default="/etc/mandos", metavar="DIR",
910
help="Directory to search for configuration"
911
" files")
912
parser.add_option("--no-dbus", action="store_false",
913
dest="use_dbus",
914
help="Do not provide D-Bus system bus"
915
" interface")
916
options = parser.parse_args()[0]
566
917
567
918
if options.check:
568
919
import doctest
569
920
doctest.testmod()
570
921
sys.exit()
571
922
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
923
# Default values for config file for server-global settings
924
server_defaults = { "interface": "",
925
"address": "",
926
"port": "",
927
"debug": "False",
928
"priority":
929
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
930
"servicename": "Mandos",
931
"use_dbus": "True",
932
}
933
934
# Parse config file for server-global settings
935
server_config = ConfigParser.SafeConfigParser(server_defaults)
936
del server_defaults
937
server_config.read(os.path.join(options.configdir, "mandos.conf"))
938
# Convert the SafeConfigParser object to a dict
939
server_settings = server_config.defaults()
940
# Use getboolean on the boolean config options
941
server_settings["debug"] = (server_config.getboolean
942
("DEFAULT", "debug"))
943
server_settings["use_dbus"] = (server_config.getboolean
944
("DEFAULT", "use_dbus"))
945
del server_config
946
947
# Override the settings from the config file with command line
948
# options, if set.
949
for option in ("interface", "address", "port", "debug",
950
"priority", "servicename", "configdir",
951
"use_dbus"):
952
value = getattr(options, option)
953
if value is not None:
954
server_settings[option] = value
955
del options
956
# Now we have our good server settings in "server_settings"
957
958
# For convenience
959
debug = server_settings["debug"]
960
use_dbus = server_settings["use_dbus"]
961
962
if not debug:
963
syslogger.setLevel(logging.WARNING)
964
console.setLevel(logging.WARNING)
965
966
if server_settings["servicename"] != "Mandos":
967
syslogger.setFormatter(logging.Formatter
968
('Mandos (%s): %%(levelname)s:'
969
' %%(message)s'
970
% server_settings["servicename"]))
971
972
# Parse config file with clients
973
client_defaults = { "timeout": "1h",
974
"interval": "5m",
975
"checker": "fping -q -- %%(host)s",
976
"host": "",
977
}
978
client_config = ConfigParser.SafeConfigParser(client_defaults)
979
client_config.read(os.path.join(server_settings["configdir"],
980
"clients.conf"))
981
982
clients = Set()
983
tcp_server = IPv6_TCPServer((server_settings["address"],
984
server_settings["port"]),
985
TCP_handler,
986
settings=server_settings,
987
clients=clients)
988
pidfilename = "/var/run/mandos.pid"
989
try:
990
pidfile = open(pidfilename, "w")
991
except IOError, error:
992
logger.error("Could not open file %r", pidfilename)
993
994
try:
995
uid = pwd.getpwnam("_mandos").pw_uid
996
gid = pwd.getpwnam("_mandos").pw_gid
997
except KeyError:
998
try:
999
uid = pwd.getpwnam("mandos").pw_uid
1000
gid = pwd.getpwnam("mandos").pw_gid
1001
except KeyError:
1002
try:
1003
uid = pwd.getpwnam("nobody").pw_uid
1004
gid = pwd.getpwnam("nogroup").pw_gid
1005
except KeyError:
1006
uid = 65534
1007
gid = 65534
1008
try:
1009
os.setuid(uid)
1010
os.setgid(gid)
1011
except OSError, error:
1012
if error[0] != errno.EPERM:
1013
raise error
1014
1015
global service
1016
service = AvahiService(name = server_settings["servicename"],
1017
servicetype = "_mandos._tcp", )
1018
if server_settings["interface"]:
1019
service.interface = (if_nametoindex
1020
(server_settings["interface"]))
1021
1022
global main_loop
1023
global bus
1024
global server
1025
# From the Avahi example code
589
1026
DBusGMainLoop(set_as_default=True )
590
1027
main_loop = gobject.MainLoop()
591
1028
bus = dbus.SystemBus()
592
server = dbus.Interface(
593
bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
594
avahi.DBUS_INTERFACE_SERVER )
1029
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
1030
avahi.DBUS_PATH_SERVER),
1031
avahi.DBUS_INTERFACE_SERVER)
595
1032
# End of Avahi example code
596
597
debug = options.debug
598
599
clients = Set()
600
def remove_from_clients(client):
601
clients.remove(client)
602
if not clients:
603
logger.debug(u"No clients left, exiting")
604
main_loop.quit()
605
606
clients.update(Set(Client(name=section, options=options,
607
stop_hook = remove_from_clients,
608
**(dict(client_config\
609
.items(section))))
1033
if use_dbus:
1034
bus_name = dbus.service.BusName(u"org.mandos-system.Mandos",
1035
bus)
1036
1037
clients.update(Set(Client(name = section,
1038
config
1039
= dict(client_config.items(section)),
1040
use_dbus = use_dbus)
610
1041
for section in client_config.sections()))
1042
if not clients:
1043
logger.warning(u"No clients defined")
1044
1045
if debug:
1046
# Redirect stdin so all checkers get /dev/null
1047
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1048
os.dup2(null, sys.stdin.fileno())
1049
if null > 2:
1050
os.close(null)
1051
else:
1052
# No console logging
1053
logger.removeHandler(console)
1054
# Close all input and output, do double fork, etc.
1055
daemon()
1056
1057
try:
1058
pid = os.getpid()
1059
pidfile.write(str(pid) + "\n")
1060
pidfile.close()
1061
del pidfile
1062
except IOError:
1063
logger.error(u"Could not write to file %r with PID %d",
1064
pidfilename, pid)
1065
except NameError:
1066
# "pidfile" was never created
1067
pass
1068
del pidfilename
1069
1070
def cleanup():
1071
"Cleanup function; run on exit"
1072
global group
1073
# From the Avahi example code
1074
if not group is None:
1075
group.Free()
1076
group = None
1077
# End of Avahi example code
1078
1079
while clients:
1080
client = clients.pop()
1081
client.disable_hook = None
1082
client.disable()
1083
1084
atexit.register(cleanup)
1085
1086
if not debug:
1087
signal.signal(signal.SIGINT, signal.SIG_IGN)
1088
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1089
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1090
1091
if use_dbus:
1092
class MandosServer(dbus.service.Object):
1093
"""A D-Bus proxy object"""
1094
def __init__(self):
1095
dbus.service.Object.__init__(self, bus,
1096
"/Mandos")
1097
_interface = u"org.mandos_system.Mandos"
1098
1099
@dbus.service.signal(_interface, signature="oa{sv}")
1100
def ClientAdded(self, objpath, properties):
1101
"D-Bus signal"
1102
pass
1103
1104
@dbus.service.signal(_interface, signature="o")
1105
def ClientRemoved(self, objpath):
1106
"D-Bus signal"
1107
pass
1108
1109
@dbus.service.method(_interface, out_signature="ao")
1110
def GetAllClients(self):
1111
return dbus.Array(c.dbus_object_path for c in clients)
1112
1113
@dbus.service.method(_interface, out_signature="a{oa{sv}}")
1114
def GetAllClientsWithProperties(self):
1115
return dbus.Dictionary(
1116
((c.dbus_object_path, c.GetAllProperties())
1117
for c in clients),
1118
signature="oa{sv}")
1119
1120
@dbus.service.method(_interface, in_signature="o")
1121
def RemoveClient(self, object_path):
1122
for c in clients:
1123
if c.dbus_object_path == object_path:
1124
clients.remove(c)
1125
# Don't signal anything except ClientRemoved
1126
c.use_dbus = False
1127
c.disable()
1128
# Emit D-Bus signal
1129
self.ClientRemoved(object_path)
1130
return
1131
raise KeyError
1132
@dbus.service.method(_interface)
1133
def Quit(self):
1134
main_loop.quit()
1135
1136
del _interface
1137
1138
mandos_server = MandosServer()
1139
611
1140
for client in clients:
612
client.start()
613
614
tcp_server = IPv6_TCPServer((None, options.port),
615
tcp_handler,
616
options=options,
617
clients=clients)
618
# Find out what random port we got
619
servicePort = tcp_server.socket.getsockname()[1]
620
logger.debug(u"Now listening on port %d", servicePort)
621
622
if options.interface is not None:
623
serviceInterface = if_nametoindex(options.interface)
624
625
# From the Avahi server example code
626
server.connect_to_signal("StateChanged", server_state_changed)
627
server_state_changed(server.GetState())
628
# End of Avahi example code
629
630
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
631
lambda *args, **kwargs:
632
tcp_server.handle_request(*args[2:],
633
**kwargs) or True)
1141
if use_dbus:
1142
# Emit D-Bus signal
1143
mandos_server.ClientAdded(client.dbus_object_path,
1144
client.GetAllProperties())
1145
client.enable()
1146
1147
tcp_server.enable()
1148
tcp_server.server_activate()
1149
1150
# Find out what port we got
1151
service.port = tcp_server.socket.getsockname()[1]
1152
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
1153
u" scope_id %d" % tcp_server.socket.getsockname())
1154
1155
#service.interface = tcp_server.socket.getsockname()[3]
1156
634
1157
try:
1158
# From the Avahi example code
1159
server.connect_to_signal("StateChanged", server_state_changed)
1160
try:
1161
server_state_changed(server.GetState())
1162
except dbus.exceptions.DBusException, error:
1163
logger.critical(u"DBusException: %s", error)
1164
sys.exit(1)
1165
# End of Avahi example code
1166
1167
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
1168
lambda *args, **kwargs:
1169
(tcp_server.handle_request
1170
(*args[2:], **kwargs) or True))
1171
1172
logger.debug(u"Starting main loop")
635
1173
main_loop.run()
1174
except AvahiError, error:
1175
logger.critical(u"AvahiError: %s", error)
1176
sys.exit(1)
636
1177
except KeyboardInterrupt:
637
print
638
639
# Cleanup here
1178
if debug:
1179
print
640
1180
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()
1181
if __name__ == '__main__':
1182
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0