To get this branch, use:
bzr branch
http://bzr.recompile.se/loggerhead/mandos/trunk
« back to all changes in this revision
Viewing changes to mandos
- browse files at revision 291
- compare with another revision
- download diff
- download tarball
- view history from revision 291
- Committer: Teddy Hogeborn
- Date: 2009-01-31 10:33:17 UTC
- mfrom: (24.1.129 mandos)
- Revision ID: teddy@fukt.bsnet.se-20090131103317-wzqvyr532sjcjt7u
Merge from Björn:
* mandos-ctl: New option "--remove-client". Only default to listing
clients if no clients were given on the command line.
* plugins.d/mandos-client.c: Lower kernel log level while bringing up
network interface. New option "--delay"
to control the maximum delay to wait for
running interface.
* plugins.d/mandos-client.xml (SYNOPSIS, OPTIONS): New option
"--delay".
* mandos-ctl: New option "--remove-client". Only default to listing
clients if no clients were given on the command line.
* plugins.d/mandos-client.c: Lower kernel log level while bringing up
network interface. New option "--delay"
to control the maximum delay to wait for
running interface.
* plugins.d/mandos-client.xml (SYNOPSIS, OPTIONS): New option
"--delay".
- 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
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
#
3
33
4
from __future__ import division
34
from __future__ import division, with_statement, absolute_import
5
35
6
36
import SocketServer
7
37
import socket
8
import select
9
from optparse import OptionParser
38
import optparse
10
39
import datetime
11
40
import errno
12
41
import gnutls.crypto
24
53
import subprocess
25
54
import atexit
26
55
import stat
56
import logging
57
import logging.handlers
58
import pwd
59
from contextlib import closing
27
60
28
61
import dbus
62
import dbus.service
29
63
import gobject
30
64
import avahi
31
65
from dbus.mainloop.glib import DBusGMainLoop
32
66
import ctypes
67
import ctypes.util
33
68
34
import logging
35
import logging.handlers
69
version = "1.0.5"
36
70
37
71
logger = logging.Logger('mandos')
38
syslogger = logging.handlers.SysLogHandler\
39
(facility = logging.handlers.SysLogHandler.LOG_DAEMON)
40
syslogger.setFormatter(logging.Formatter\
41
('%(levelname)s: %(message)s'))
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'))
42
77
logger.addHandler(syslogger)
43
del syslogger
44
45
# This variable is used to optionally bind to a specified interface.
46
# It is a global variable to fit in with the other variables from the
47
# Avahi server example code.
48
serviceInterface = avahi.IF_UNSPEC
49
# From the Avahi server example code:
50
serviceName = "Mandos"
51
serviceType = "_mandos._tcp" # http://www.dns-sd.org/ServiceTypes.html
52
servicePort = None # Not known at startup
53
serviceTXT = [] # TXT record for the service
54
domain = "" # Domain to publish on, default to .local
55
host = "" # Host to publish records for, default to localhost
56
group = None #our entry group
57
rename_count = 12 # Counter so we only rename after collisions a
58
# sensible number of times
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
59
170
# End of Avahi example code
60
171
61
172
62
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):
63
179
"""A representation of a client host served by this server.
64
180
Attributes:
65
name: string; from the config file, used in log messages
181
name: string; from the config file, used in log messages and
182
D-Bus identifiers
66
183
fingerprint: string (40 or 32 hexadecimal digits); used to
67
184
uniquely identify the client
68
secret: bytestring; sent verbatim (over TLS) to client
69
fqdn: string (FQDN); available for use by the checker command
70
created: datetime.datetime()
71
last_seen: datetime.datetime() or None if not yet seen
72
timeout: datetime.timedelta(); How long from last_seen until
73
this client is invalid
74
interval: datetime.timedelta(); How often to start a new checker
75
stop_hook: If set, called by stop() as stop_hook(self)
76
checker: subprocess.Popen(); a running checker process used
77
to see if the client lives.
78
Is None if no process is running.
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.
79
198
checker_initiator_tag: a gobject event source tag, or None
80
stop_initiator_tag: - '' -
199
disable_initiator_tag: - '' -
81
200
checker_callback_tag: - '' -
82
201
checker_command: string; External command which is run to check if
83
client lives. %()s expansions are done at
202
client lives. %() expansions are done at
84
203
runtime with vars(self) as dict, so that for
85
204
instance %(name)s can be used in the command.
86
Private attibutes:
87
_timeout: Real variable for 'timeout'
88
_interval: Real variable for 'interval'
89
_timeout_milliseconds: Used by gobject.timeout_add()
90
_interval_milliseconds: - '' -
205
use_dbus: bool(); Whether to provide D-Bus interface and signals
206
dbus_object_path: dbus.ObjectPath ; only set if self.use_dbus
91
207
"""
92
def _set_timeout(self, timeout):
93
"Setter function for 'timeout' attribute"
94
self._timeout = timeout
95
self._timeout_milliseconds = ((self.timeout.days
96
* 24 * 60 * 60 * 1000)
97
+ (self.timeout.seconds * 1000)
98
+ (self.timeout.microseconds
99
// 1000))
100
timeout = property(lambda self: self._timeout,
101
_set_timeout)
102
del _set_timeout
103
def _set_interval(self, interval):
104
"Setter function for 'interval' attribute"
105
self._interval = interval
106
self._interval_milliseconds = ((self.interval.days
107
* 24 * 60 * 60 * 1000)
108
+ (self.interval.seconds
109
* 1000)
110
+ (self.interval.microseconds
111
// 1000))
112
interval = property(lambda self: self._interval,
113
_set_interval)
114
del _set_interval
115
def __init__(self, name=None, options=None, stop_hook=None,
116
fingerprint=None, secret=None, secfile=None,
117
fqdn=None, timeout=None, interval=-1, checker=None):
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."""
118
225
self.name = name
119
# Uppercase and remove spaces from fingerprint
120
# for later comparison purposes with return value of
121
# the fingerprint() function
122
self.fingerprint = fingerprint.upper().replace(u" ", u"")
123
if secret:
124
self.secret = secret.decode(u"base64")
125
elif secfile:
126
sf = open(secfile)
127
self.secret = sf.read()
128
sf.close()
129
else:
130
raise RuntimeError(u"No secret or secfile for client %s"
131
% self.name)
132
self.fqdn = fqdn # string
133
self.created = datetime.datetime.now()
134
self.last_seen = None
135
if timeout is None:
136
self.timeout = options.timeout
137
else:
138
self.timeout = string_to_delta(timeout)
139
if interval == -1:
140
self.interval = options.interval
141
else:
142
self.interval = string_to_delta(interval)
143
self.stop_hook = stop_hook
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
144
254
self.checker = None
145
255
self.checker_initiator_tag = None
146
self.stop_initiator_tag = None
256
self.disable_initiator_tag = None
147
257
self.checker_callback_tag = None
148
self.check_command = checker
149
def start(self):
150
"""Start this clients checker and timeout hooks"""
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()
151
273
# Schedule a new checker to be started an 'interval' from now,
152
274
# and every interval from then on.
153
self.checker_initiator_tag = gobject.timeout_add\
154
(self._interval_milliseconds,
155
self.start_checker)
275
self.checker_initiator_tag = (gobject.timeout_add
276
(self.interval_milliseconds(),
277
self.start_checker))
156
278
# Also start a new checker *right now*.
157
279
self.start_checker()
158
# Schedule a stop() when 'timeout' has passed
159
self.stop_initiator_tag = gobject.timeout_add\
160
(self._timeout_milliseconds,
161
self.stop)
162
def stop(self):
163
"""Stop this client.
164
The possibility that this client might be restarted is left
165
open, but not currently used."""
166
logger.debug(u"Stopping client %s", self.name)
167
self.secret = None
168
if self.stop_initiator_tag:
169
gobject.source_remove(self.stop_initiator_tag)
170
self.stop_initiator_tag = None
171
if self.checker_initiator_tag:
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):
172
302
gobject.source_remove(self.checker_initiator_tag)
173
303
self.checker_initiator_tag = None
174
304
self.stop_checker()
175
if self.stop_hook:
176
self.stop_hook(self)
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))
177
312
# Do not run this again if called by a gobject.timeout_add
178
313
return False
314
179
315
def __del__(self):
180
# Some code duplication here and in stop()
181
if hasattr(self, "stop_initiator_tag") \
182
and self.stop_initiator_tag:
183
gobject.source_remove(self.stop_initiator_tag)
184
self.stop_initiator_tag = None
185
if hasattr(self, "checker_initiator_tag") \
186
and self.checker_initiator_tag:
187
gobject.source_remove(self.checker_initiator_tag)
188
self.checker_initiator_tag = None
189
self.stop_checker()
190
def checker_callback(self, pid, condition):
316
self.disable_hook = None
317
self.disable()
318
319
def checker_callback(self, pid, condition, command):
191
320
"""The checker has completed, so take appropriate actions."""
192
now = datetime.datetime.now()
193
if os.WIFEXITED(condition) \
194
and (os.WEXITSTATUS(condition) == 0):
195
logger.debug(u"Checker for %(name)s succeeded",
196
vars(self))
197
self.last_seen = now
198
gobject.source_remove(self.stop_initiator_tag)
199
self.stop_initiator_tag = gobject.timeout_add\
200
(self._timeout_milliseconds,
201
self.stop)
202
elif not os.WIFEXITED(condition):
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
exitstatus = os.WEXITSTATUS(condition)
329
if exitstatus == 0:
330
logger.info(u"Checker for %(name)s succeeded",
331
vars(self))
332
self.checked_ok()
333
else:
334
logger.info(u"Checker for %(name)s failed",
335
vars(self))
336
if self.use_dbus:
337
# Emit D-Bus signal
338
self.CheckerCompleted(dbus.Int16(exitstatus),
339
dbus.Int64(condition),
340
dbus.String(command))
341
else:
203
342
logger.warning(u"Checker for %(name)s crashed?",
204
343
vars(self))
205
else:
206
logger.debug(u"Checker for %(name)s failed",
207
vars(self))
208
self.checker = None
209
self.checker_callback_tag = None
344
if self.use_dbus:
345
# Emit D-Bus signal
346
self.CheckerCompleted(dbus.Int16(-1),
347
dbus.Int64(condition),
348
dbus.String(command))
349
350
def checked_ok(self):
351
"""Bump up the timeout for this client.
352
This should only be called when the client has been seen,
353
alive and well.
354
"""
355
self.last_checked_ok = datetime.datetime.utcnow()
356
gobject.source_remove(self.disable_initiator_tag)
357
self.disable_initiator_tag = (gobject.timeout_add
358
(self.timeout_milliseconds(),
359
self.disable))
360
if self.use_dbus:
361
# Emit D-Bus signal
362
self.PropertyChanged(
363
dbus.String(u"last_checked_ok"),
364
(_datetime_to_dbus(self.last_checked_ok,
365
variant_level=1)))
366
210
367
def start_checker(self):
211
368
"""Start a new checker subprocess if one is not running.
212
369
If a checker already exists, leave it running and do
213
370
nothing."""
371
# The reason for not killing a running checker is that if we
372
# did that, then if a checker (for some reason) started
373
# running slowly and taking more than 'interval' time, the
374
# client would inevitably timeout, since no checker would get
375
# a chance to run to completion. If we instead leave running
376
# checkers alone, the checker would have to take more time
377
# than 'timeout' for the client to be declared invalid, which
378
# is as it should be.
214
379
if self.checker is None:
215
380
try:
216
command = self.check_command % self.fqdn
381
# In case checker_command has exactly one % operator
382
command = self.checker_command % self.host
217
383
except TypeError:
384
# Escape attributes for the shell
218
385
escaped_attrs = dict((key, re.escape(str(val)))
219
386
for key, val in
220
387
vars(self).iteritems())
221
388
try:
222
command = self.check_command % escaped_attrs
389
command = self.checker_command % escaped_attrs
223
390
except TypeError, error:
224
logger.critical(u'Could not format string "%s":'
225
u' %s', self.check_command, error)
391
logger.error(u'Could not format string "%s":'
392
u' %s', self.checker_command, error)
226
393
return True # Try again later
227
394
try:
228
logger.debug(u"Starting checker %r for %s",
229
command, self.name)
230
self.checker = subprocess.\
231
Popen(command,
232
close_fds=True, shell=True,
233
cwd="/")
234
self.checker_callback_tag = gobject.child_watch_add\
235
(self.checker.pid,
236
self.checker_callback)
237
except subprocess.OSError, error:
395
logger.info(u"Starting checker %r for %s",
396
command, self.name)
397
# We don't need to redirect stdout and stderr, since
398
# in normal mode, that is already done by daemon(),
399
# and in debug mode we don't want to. (Stdin is
400
# always replaced by /dev/null.)
401
self.checker = subprocess.Popen(command,
402
close_fds=True,
403
shell=True, cwd="/")
404
if self.use_dbus:
405
# Emit D-Bus signal
406
self.CheckerStarted(command)
407
self.PropertyChanged(
408
dbus.String("checker_running"),
409
dbus.Boolean(True, variant_level=1))
410
self.checker_callback_tag = (gobject.child_watch_add
411
(self.checker.pid,
412
self.checker_callback,
413
data=command))
414
except OSError, error:
238
415
logger.error(u"Failed to start subprocess: %s",
239
416
error)
240
417
# Re-run this periodically if run by gobject.timeout_add
241
418
return True
419
242
420
def stop_checker(self):
243
421
"""Force the checker process, if any, to stop."""
244
if not hasattr(self, "checker") or self.checker is None:
422
if self.checker_callback_tag:
423
gobject.source_remove(self.checker_callback_tag)
424
self.checker_callback_tag = None
425
if getattr(self, "checker", None) is None:
245
426
return
246
gobject.source_remove(self.checker_callback_tag)
247
self.checker_callback_tag = None
248
os.kill(self.checker.pid, signal.SIGTERM)
249
if self.checker.poll() is None:
250
os.kill(self.checker.pid, signal.SIGKILL)
427
logger.debug(u"Stopping checker for %(name)s", vars(self))
428
try:
429
os.kill(self.checker.pid, signal.SIGTERM)
430
#os.sleep(0.5)
431
#if self.checker.poll() is None:
432
# os.kill(self.checker.pid, signal.SIGKILL)
433
except OSError, error:
434
if error.errno != errno.ESRCH: # No such process
435
raise
251
436
self.checker = None
252
def still_valid(self, now=None):
437
if self.use_dbus:
438
self.PropertyChanged(dbus.String(u"checker_running"),
439
dbus.Boolean(False, variant_level=1))
440
441
def still_valid(self):
253
442
"""Has the timeout not yet passed for this client?"""
254
if now is None:
255
now = datetime.datetime.now()
256
if self.last_seen is None:
443
if not getattr(self, "enabled", False):
444
return False
445
now = datetime.datetime.utcnow()
446
if self.last_checked_ok is None:
257
447
return now < (self.created + self.timeout)
258
448
else:
259
return now < (self.last_seen + self.timeout)
449
return now < (self.last_checked_ok + self.timeout)
450
451
## D-Bus methods & signals
452
_interface = u"se.bsnet.fukt.Mandos.Client"
453
454
# CheckedOK - method
455
CheckedOK = dbus.service.method(_interface)(checked_ok)
456
CheckedOK.__name__ = "CheckedOK"
457
458
# CheckerCompleted - signal
459
@dbus.service.signal(_interface, signature="nxs")
460
def CheckerCompleted(self, exitcode, waitstatus, command):
461
"D-Bus signal"
462
pass
463
464
# CheckerStarted - signal
465
@dbus.service.signal(_interface, signature="s")
466
def CheckerStarted(self, command):
467
"D-Bus signal"
468
pass
469
470
# GetAllProperties - method
471
@dbus.service.method(_interface, out_signature="a{sv}")
472
def GetAllProperties(self):
473
"D-Bus method"
474
return dbus.Dictionary({
475
dbus.String("name"):
476
dbus.String(self.name, variant_level=1),
477
dbus.String("fingerprint"):
478
dbus.String(self.fingerprint, variant_level=1),
479
dbus.String("host"):
480
dbus.String(self.host, variant_level=1),
481
dbus.String("created"):
482
_datetime_to_dbus(self.created, variant_level=1),
483
dbus.String("last_enabled"):
484
(_datetime_to_dbus(self.last_enabled,
485
variant_level=1)
486
if self.last_enabled is not None
487
else dbus.Boolean(False, variant_level=1)),
488
dbus.String("enabled"):
489
dbus.Boolean(self.enabled, variant_level=1),
490
dbus.String("last_checked_ok"):
491
(_datetime_to_dbus(self.last_checked_ok,
492
variant_level=1)
493
if self.last_checked_ok is not None
494
else dbus.Boolean (False, variant_level=1)),
495
dbus.String("timeout"):
496
dbus.UInt64(self.timeout_milliseconds(),
497
variant_level=1),
498
dbus.String("interval"):
499
dbus.UInt64(self.interval_milliseconds(),
500
variant_level=1),
501
dbus.String("checker"):
502
dbus.String(self.checker_command,
503
variant_level=1),
504
dbus.String("checker_running"):
505
dbus.Boolean(self.checker is not None,
506
variant_level=1),
507
dbus.String("object_path"):
508
dbus.ObjectPath(self.dbus_object_path,
509
variant_level=1)
510
}, signature="sv")
511
512
# IsStillValid - method
513
IsStillValid = (dbus.service.method(_interface, out_signature="b")
514
(still_valid))
515
IsStillValid.__name__ = "IsStillValid"
516
517
# PropertyChanged - signal
518
@dbus.service.signal(_interface, signature="sv")
519
def PropertyChanged(self, property, value):
520
"D-Bus signal"
521
pass
522
523
# SetChecker - method
524
@dbus.service.method(_interface, in_signature="s")
525
def SetChecker(self, checker):
526
"D-Bus setter method"
527
self.checker_command = checker
528
# Emit D-Bus signal
529
self.PropertyChanged(dbus.String(u"checker"),
530
dbus.String(self.checker_command,
531
variant_level=1))
532
533
# SetHost - method
534
@dbus.service.method(_interface, in_signature="s")
535
def SetHost(self, host):
536
"D-Bus setter method"
537
self.host = host
538
# Emit D-Bus signal
539
self.PropertyChanged(dbus.String(u"host"),
540
dbus.String(self.host, variant_level=1))
541
542
# SetInterval - method
543
@dbus.service.method(_interface, in_signature="t")
544
def SetInterval(self, milliseconds):
545
self.interval = datetime.timedelta(0, 0, 0, milliseconds)
546
# Emit D-Bus signal
547
self.PropertyChanged(dbus.String(u"interval"),
548
(dbus.UInt64(self.interval_milliseconds(),
549
variant_level=1)))
550
551
# SetSecret - method
552
@dbus.service.method(_interface, in_signature="ay",
553
byte_arrays=True)
554
def SetSecret(self, secret):
555
"D-Bus setter method"
556
self.secret = str(secret)
557
558
# SetTimeout - method
559
@dbus.service.method(_interface, in_signature="t")
560
def SetTimeout(self, milliseconds):
561
self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
562
# Emit D-Bus signal
563
self.PropertyChanged(dbus.String(u"timeout"),
564
(dbus.UInt64(self.timeout_milliseconds(),
565
variant_level=1)))
566
567
# Enable - method
568
Enable = dbus.service.method(_interface)(enable)
569
Enable.__name__ = "Enable"
570
571
# StartChecker - method
572
@dbus.service.method(_interface)
573
def StartChecker(self):
574
"D-Bus method"
575
self.start_checker()
576
577
# Disable - method
578
@dbus.service.method(_interface)
579
def Disable(self):
580
"D-Bus method"
581
self.disable()
582
583
# StopChecker - method
584
StopChecker = dbus.service.method(_interface)(stop_checker)
585
StopChecker.__name__ = "StopChecker"
586
587
del _interface
260
588
261
589
262
590
def peer_certificate(session):
263
"Return an OpenPGP data packet string for the peer's certificate"
591
"Return the peer's OpenPGP certificate as a bytestring"
264
592
# If not an OpenPGP certificate...
265
if gnutls.library.functions.gnutls_certificate_type_get\
266
(session._c_object) \
267
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP:
593
if (gnutls.library.functions
594
.gnutls_certificate_type_get(session._c_object)
595
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
268
596
# ...do the normal thing
269
597
return session.peer_certificate
270
list_size = ctypes.c_uint()
271
cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
272
(session._c_object, ctypes.byref(list_size))
598
list_size = ctypes.c_uint(1)
599
cert_list = (gnutls.library.functions
600
.gnutls_certificate_get_peers
601
(session._c_object, ctypes.byref(list_size)))
602
if not bool(cert_list) and list_size.value != 0:
603
raise gnutls.errors.GNUTLSError("error getting peer"
604
" certificate")
273
605
if list_size.value == 0:
274
606
return None
275
607
cert = cert_list[0]
277
609
278
610
279
611
def fingerprint(openpgp):
280
"Convert an OpenPGP data string to a hexdigit fingerprint string"
612
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
613
# New GnuTLS "datum" with the OpenPGP public key
614
datum = (gnutls.library.types
615
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
616
ctypes.POINTER
617
(ctypes.c_ubyte)),
618
ctypes.c_uint(len(openpgp))))
281
619
# New empty GnuTLS certificate
282
620
crt = gnutls.library.types.gnutls_openpgp_crt_t()
283
gnutls.library.functions.gnutls_openpgp_crt_init\
284
(ctypes.byref(crt))
285
# New GnuTLS "datum" with the OpenPGP public key
286
datum = gnutls.library.types.gnutls_datum_t\
287
(ctypes.cast(ctypes.c_char_p(openpgp),
288
ctypes.POINTER(ctypes.c_ubyte)),
289
ctypes.c_uint(len(openpgp)))
621
(gnutls.library.functions
622
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
290
623
# Import the OpenPGP public key into the certificate
291
ret = gnutls.library.functions.gnutls_openpgp_crt_import\
292
(crt,
293
ctypes.byref(datum),
294
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
624
(gnutls.library.functions
625
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
626
gnutls.library.constants
627
.GNUTLS_OPENPGP_FMT_RAW))
628
# Verify the self signature in the key
629
crtverify = ctypes.c_uint()
630
(gnutls.library.functions
631
.gnutls_openpgp_crt_verify_self(crt, 0, ctypes.byref(crtverify)))
632
if crtverify.value != 0:
633
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
634
raise gnutls.errors.CertificateSecurityError("Verify failed")
295
635
# New buffer for the fingerprint
296
buffer = ctypes.create_string_buffer(20)
297
buffer_length = ctypes.c_size_t()
636
buf = ctypes.create_string_buffer(20)
637
buf_len = ctypes.c_size_t()
298
638
# Get the fingerprint from the certificate into the buffer
299
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
300
(crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
639
(gnutls.library.functions
640
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
641
ctypes.byref(buf_len)))
301
642
# Deinit the certificate
302
643
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
303
644
# Convert the buffer to a Python bytestring
304
fpr = ctypes.string_at(buffer, buffer_length.value)
645
fpr = ctypes.string_at(buf, buf_len.value)
305
646
# Convert the bytestring to hexadecimal notation
306
647
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
307
648
return hex_fpr
308
649
309
650
310
class tcp_handler(SocketServer.BaseRequestHandler, object):
651
class TCP_handler(SocketServer.BaseRequestHandler, object):
311
652
"""A TCP request handler class.
312
653
Instantiated by IPv6_TCPServer for each request to handle it.
313
654
Note: This will run in its own forked process."""
314
655
315
656
def handle(self):
316
logger.debug(u"TCP connection from: %s",
317
unicode(self.client_address))
318
session = gnutls.connection.ClientSession(self.request,
319
gnutls.connection.\
320
X509Credentials())
657
logger.info(u"TCP connection from: %s",
658
unicode(self.client_address))
659
session = (gnutls.connection
660
.ClientSession(self.request,
661
gnutls.connection
662
.X509Credentials()))
663
664
line = self.request.makefile().readline()
665
logger.debug(u"Protocol version: %r", line)
666
try:
667
if int(line.strip().split()[0]) > 1:
668
raise RuntimeError
669
except (ValueError, IndexError, RuntimeError), error:
670
logger.error(u"Unknown protocol version: %s", error)
671
return
672
673
# Note: gnutls.connection.X509Credentials is really a generic
674
# GnuTLS certificate credentials object so long as no X.509
675
# keys are added to it. Therefore, we can use it here despite
676
# using OpenPGP certificates.
321
677
322
678
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
323
679
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
324
680
# "+DHE-DSS"))
325
priority = "SECURE256"
326
327
gnutls.library.functions.gnutls_priority_set_direct\
328
(session._c_object, priority, None);
681
# Use a fallback default, since this MUST be set.
682
priority = self.server.settings.get("priority", "NORMAL")
683
(gnutls.library.functions
684
.gnutls_priority_set_direct(session._c_object,
685
priority, None))
329
686
330
687
try:
331
688
session.handshake()
332
689
except gnutls.errors.GNUTLSError, error:
333
logger.debug(u"Handshake failed: %s", error)
690
logger.warning(u"Handshake failed: %s", error)
334
691
# Do not run session.bye() here: the session is not
335
692
# established. Just abandon the request.
336
693
return
694
logger.debug(u"Handshake succeeded")
337
695
try:
338
696
fpr = fingerprint(peer_certificate(session))
339
697
except (TypeError, gnutls.errors.GNUTLSError), error:
340
logger.debug(u"Bad certificate: %s", error)
698
logger.warning(u"Bad certificate: %s", error)
341
699
session.bye()
342
700
return
343
701
logger.debug(u"Fingerprint: %s", fpr)
344
client = None
345
for c in clients:
702
703
for c in self.server.clients:
346
704
if c.fingerprint == fpr:
347
705
client = c
348
706
break
707
else:
708
logger.warning(u"Client not found for fingerprint: %s",
709
fpr)
710
session.bye()
711
return
349
712
# Have to check if client.still_valid(), since it is possible
350
713
# that the client timed out while establishing the GnuTLS
351
714
# session.
352
if (not client) or (not client.still_valid()):
353
if client:
354
logger.debug(u"Client %(name)s is invalid",
355
vars(client))
356
else:
357
logger.debug(u"Client not found for fingerprint: %s",
358
fpr)
715
if not client.still_valid():
716
logger.warning(u"Client %(name)s is invalid",
717
vars(client))
359
718
session.bye()
360
719
return
720
## This won't work here, since we're in a fork.
721
# client.checked_ok()
361
722
sent_size = 0
362
723
while sent_size < len(client.secret):
363
724
sent = session.send(client.secret[sent_size:])
368
729
session.bye()
369
730
370
731
371
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
732
class IPv6_TCPServer(SocketServer.ForkingMixIn,
733
SocketServer.TCPServer, object):
372
734
"""IPv6 TCP server. Accepts 'None' as address and/or port.
373
735
Attributes:
374
options: Command line options
736
settings: Server settings
375
737
clients: Set() of Client objects
738
enabled: Boolean; whether this server is activated yet
376
739
"""
377
740
address_family = socket.AF_INET6
378
741
def __init__(self, *args, **kwargs):
379
if "options" in kwargs:
380
self.options = kwargs["options"]
381
del kwargs["options"]
742
if "settings" in kwargs:
743
self.settings = kwargs["settings"]
744
del kwargs["settings"]
382
745
if "clients" in kwargs:
383
746
self.clients = kwargs["clients"]
384
747
del kwargs["clients"]
385
return super(type(self), self).__init__(*args, **kwargs)
748
self.enabled = False
749
super(IPv6_TCPServer, self).__init__(*args, **kwargs)
386
750
def server_bind(self):
387
751
"""This overrides the normal server_bind() function
388
752
to bind to an interface if one was specified, and also NOT to
389
753
bind to an address or port if they were not specified."""
390
if self.options.interface:
391
if not hasattr(socket, "SO_BINDTODEVICE"):
392
# From /usr/include/asm-i486/socket.h
393
socket.SO_BINDTODEVICE = 25
754
if self.settings["interface"]:
755
# 25 is from /usr/include/asm-i486/socket.h
756
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
394
757
try:
395
758
self.socket.setsockopt(socket.SOL_SOCKET,
396
socket.SO_BINDTODEVICE,
397
self.options.interface)
759
SO_BINDTODEVICE,
760
self.settings["interface"])
398
761
except socket.error, error:
399
762
if error[0] == errno.EPERM:
400
logger.warning(u"No permission to"
401
u" bind to interface %s",
402
self.options.interface)
763
logger.error(u"No permission to"
764
u" bind to interface %s",
765
self.settings["interface"])
403
766
else:
404
767
raise error
405
768
# Only bind(2) the socket if we really need to.
408
771
in6addr_any = "::"
409
772
self.server_address = (in6addr_any,
410
773
self.server_address[1])
411
elif self.server_address[1] is None:
774
elif not self.server_address[1]:
412
775
self.server_address = (self.server_address[0],
413
776
0)
414
return super(type(self), self).server_bind()
777
# if self.settings["interface"]:
778
# self.server_address = (self.server_address[0],
779
# 0, # port
780
# 0, # flowinfo
781
# if_nametoindex
782
# (self.settings
783
# ["interface"]))
784
return super(IPv6_TCPServer, self).server_bind()
785
def server_activate(self):
786
if self.enabled:
787
return super(IPv6_TCPServer, self).server_activate()
788
def enable(self):
789
self.enabled = True
415
790
416
791
417
792
def string_to_delta(interval):
418
793
"""Parse a string and return a datetime.timedelta
419
794
420
795
>>> string_to_delta('7d')
421
796
datetime.timedelta(7)
422
797
>>> string_to_delta('60s')
427
802
datetime.timedelta(1)
428
803
>>> string_to_delta(u'1w')
429
804
datetime.timedelta(7)
805
>>> string_to_delta('5m 30s')
806
datetime.timedelta(0, 330)
430
807
"""
431
try:
432
suffix=unicode(interval[-1])
433
value=int(interval[:-1])
434
if suffix == u"d":
435
delta = datetime.timedelta(value)
436
elif suffix == u"s":
437
delta = datetime.timedelta(0, value)
438
elif suffix == u"m":
439
delta = datetime.timedelta(0, 0, 0, 0, value)
440
elif suffix == u"h":
441
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
442
elif suffix == u"w":
443
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
444
else:
808
timevalue = datetime.timedelta(0)
809
for s in interval.split():
810
try:
811
suffix = unicode(s[-1])
812
value = int(s[:-1])
813
if suffix == u"d":
814
delta = datetime.timedelta(value)
815
elif suffix == u"s":
816
delta = datetime.timedelta(0, value)
817
elif suffix == u"m":
818
delta = datetime.timedelta(0, 0, 0, 0, value)
819
elif suffix == u"h":
820
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
821
elif suffix == u"w":
822
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
823
else:
824
raise ValueError
825
except (ValueError, IndexError):
445
826
raise ValueError
446
except (ValueError, IndexError):
447
raise ValueError
448
return delta
449
450
451
def add_service():
452
"""From the Avahi server example code"""
453
global group, serviceName, serviceType, servicePort, serviceTXT, \
454
domain, host
455
if group is None:
456
group = dbus.Interface(
457
bus.get_object( avahi.DBUS_NAME,
458
server.EntryGroupNew()),
459
avahi.DBUS_INTERFACE_ENTRY_GROUP)
460
group.connect_to_signal('StateChanged',
461
entry_group_state_changed)
462
logger.debug(u"Adding service '%s' of type '%s' ...",
463
serviceName, serviceType)
464
465
group.AddService(
466
serviceInterface, # interface
467
avahi.PROTO_INET6, # protocol
468
dbus.UInt32(0), # flags
469
serviceName, serviceType,
470
domain, host,
471
dbus.UInt16(servicePort),
472
avahi.string_array_to_txt_array(serviceTXT))
473
group.Commit()
474
475
476
def remove_service():
477
"""From the Avahi server example code"""
478
global group
479
480
if not group is None:
481
group.Reset()
827
timevalue += delta
828
return timevalue
482
829
483
830
484
831
def server_state_changed(state):
485
"""From the Avahi server example code"""
832
"""Derived from the Avahi example code"""
486
833
if state == avahi.SERVER_COLLISION:
487
logger.warning(u"Server name collision")
488
remove_service()
834
logger.error(u"Zeroconf server name collision")
835
service.remove()
489
836
elif state == avahi.SERVER_RUNNING:
490
add_service()
837
service.add()
491
838
492
839
493
840
def entry_group_state_changed(state, error):
494
"""From the Avahi server example code"""
495
global serviceName, server, rename_count
496
497
logger.debug(u"state change: %i", state)
841
"""Derived from the Avahi example code"""
842
logger.debug(u"Avahi state change: %i", state)
498
843
499
844
if state == avahi.ENTRY_GROUP_ESTABLISHED:
500
logger.debug(u"Service established.")
845
logger.debug(u"Zeroconf service established.")
501
846
elif state == avahi.ENTRY_GROUP_COLLISION:
502
503
rename_count = rename_count - 1
504
if rename_count > 0:
505
name = server.GetAlternativeServiceName(name)
506
logger.warning(u"Service name collision, "
507
u"changing name to '%s' ...", name)
508
remove_service()
509
add_service()
510
511
else:
512
logger.error(u"No suitable service name found after %i"
513
u" retries, exiting.", n_rename)
514
killme(1)
847
logger.warning(u"Zeroconf service name collision.")
848
service.rename()
515
849
elif state == avahi.ENTRY_GROUP_FAILURE:
516
logger.error(u"Error in group state changed %s",
517
unicode(error))
518
killme(1)
519
850
logger.critical(u"Avahi: Error in group state changed %s",
851
unicode(error))
852
raise AvahiGroupError(u"State changed: %s" % unicode(error))
520
853
521
854
def if_nametoindex(interface):
522
"""Call the C function if_nametoindex()"""
855
"""Call the C function if_nametoindex(), or equivalent"""
856
global if_nametoindex
523
857
try:
524
libc = ctypes.cdll.LoadLibrary("libc.so.6")
525
return libc.if_nametoindex(interface)
858
if_nametoindex = (ctypes.cdll.LoadLibrary
859
(ctypes.util.find_library("c"))
860
.if_nametoindex)
526
861
except (OSError, AttributeError):
527
862
if "struct" not in sys.modules:
528
863
import struct
529
864
if "fcntl" not in sys.modules:
530
865
import fcntl
531
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
532
s = socket.socket()
533
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
534
struct.pack("16s16x", interface))
535
s.close()
536
interface_index = struct.unpack("I", ifreq[16:20])[0]
537
return interface_index
538
539
540
def daemon(nochdir, noclose):
866
def if_nametoindex(interface):
867
"Get an interface index the hard way, i.e. using fcntl()"
868
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
869
with closing(socket.socket()) as s:
870
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
871
struct.pack("16s16x", interface))
872
interface_index = struct.unpack("I", ifreq[16:20])[0]
873
return interface_index
874
return if_nametoindex(interface)
875
876
877
def daemon(nochdir = False, noclose = False):
541
878
"""See daemon(3). Standard BSD Unix function.
542
879
This should really exist as os.daemon, but it doesn't (yet)."""
543
880
if os.fork():
545
882
os.setsid()
546
883
if not nochdir:
547
884
os.chdir("/")
885
if os.fork():
886
sys.exit()
548
887
if not noclose:
549
888
# Close all standard open file descriptors
550
null = os.open("/dev/null", os.O_NOCTTY | os.O_RDWR)
889
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
551
890
if not stat.S_ISCHR(os.fstat(null).st_mode):
552
891
raise OSError(errno.ENODEV,
553
892
"/dev/null not a character device")
558
897
os.close(null)
559
898
560
899
561
def killme(status = 0):
562
logger.debug("Stopping server with exit status %d", status)
563
exitstatus = status
564
if main_loop_started:
565
main_loop.quit()
566
else:
567
sys.exit(status)
568
569
570
if __name__ == '__main__':
571
exitstatus = 0
572
main_loop_started = False
573
parser = OptionParser()
900
def main():
901
parser = optparse.OptionParser(version = "%%prog %s" % version)
574
902
parser.add_option("-i", "--interface", type="string",
575
default=None, metavar="IF",
576
help="Bind to interface IF")
577
parser.add_option("-p", "--port", type="int", default=None,
903
metavar="IF", help="Bind to interface IF")
904
parser.add_option("-a", "--address", type="string",
905
help="Address to listen for requests on")
906
parser.add_option("-p", "--port", type="int",
578
907
help="Port number to receive requests on")
579
parser.add_option("--timeout", type="string", # Parsed later
580
default="1h",
581
help="Amount of downtime allowed for clients")
582
parser.add_option("--interval", type="string", # Parsed later
583
default="5m",
584
help="How often to check that a client is up")
585
parser.add_option("--check", action="store_true", default=False,
908
parser.add_option("--check", action="store_true",
586
909
help="Run self-test")
587
parser.add_option("--debug", action="store_true", default=False,
588
help="Debug mode")
589
(options, args) = parser.parse_args()
910
parser.add_option("--debug", action="store_true",
911
help="Debug mode; run in foreground and log to"
912
" terminal")
913
parser.add_option("--priority", type="string", help="GnuTLS"
914
" priority string (see GnuTLS documentation)")
915
parser.add_option("--servicename", type="string", metavar="NAME",
916
help="Zeroconf service name")
917
parser.add_option("--configdir", type="string",
918
default="/etc/mandos", metavar="DIR",
919
help="Directory to search for configuration"
920
" files")
921
parser.add_option("--no-dbus", action="store_false",
922
dest="use_dbus",
923
help="Do not provide D-Bus system bus"
924
" interface")
925
options = parser.parse_args()[0]
590
926
591
927
if options.check:
592
928
import doctest
593
929
doctest.testmod()
594
930
sys.exit()
595
931
596
# Parse the time arguments
597
try:
598
options.timeout = string_to_delta(options.timeout)
599
except ValueError:
600
parser.error("option --timeout: Unparseable time")
601
try:
602
options.interval = string_to_delta(options.interval)
603
except ValueError:
604
parser.error("option --interval: Unparseable time")
605
606
# Parse config file
607
defaults = { "checker": "fping -q -- %%(fqdn)s" }
608
client_config = ConfigParser.SafeConfigParser(defaults)
609
#client_config.readfp(open("secrets.conf"), "secrets.conf")
610
client_config.read("mandos-clients.conf")
611
612
# From the Avahi server example code
932
# Default values for config file for server-global settings
933
server_defaults = { "interface": "",
934
"address": "",
935
"port": "",
936
"debug": "False",
937
"priority":
938
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
939
"servicename": "Mandos",
940
"use_dbus": "True",
941
}
942
943
# Parse config file for server-global settings
944
server_config = ConfigParser.SafeConfigParser(server_defaults)
945
del server_defaults
946
server_config.read(os.path.join(options.configdir, "mandos.conf"))
947
# Convert the SafeConfigParser object to a dict
948
server_settings = server_config.defaults()
949
# Use the appropriate methods on the non-string config options
950
server_settings["debug"] = server_config.getboolean("DEFAULT",
951
"debug")
952
server_settings["use_dbus"] = server_config.getboolean("DEFAULT",
953
"use_dbus")
954
if server_settings["port"]:
955
server_settings["port"] = server_config.getint("DEFAULT",
956
"port")
957
del server_config
958
959
# Override the settings from the config file with command line
960
# options, if set.
961
for option in ("interface", "address", "port", "debug",
962
"priority", "servicename", "configdir",
963
"use_dbus"):
964
value = getattr(options, option)
965
if value is not None:
966
server_settings[option] = value
967
del options
968
# Now we have our good server settings in "server_settings"
969
970
# For convenience
971
debug = server_settings["debug"]
972
use_dbus = server_settings["use_dbus"]
973
974
def sigsegvhandler(signum, frame):
975
raise RuntimeError('Segmentation fault')
976
977
if not debug:
978
syslogger.setLevel(logging.WARNING)
979
console.setLevel(logging.WARNING)
980
else:
981
signal.signal(signal.SIGSEGV, sigsegvhandler)
982
983
if server_settings["servicename"] != "Mandos":
984
syslogger.setFormatter(logging.Formatter
985
('Mandos (%s): %%(levelname)s:'
986
' %%(message)s'
987
% server_settings["servicename"]))
988
989
# Parse config file with clients
990
client_defaults = { "timeout": "1h",
991
"interval": "5m",
992
"checker": "fping -q -- %%(host)s",
993
"host": "",
994
}
995
client_config = ConfigParser.SafeConfigParser(client_defaults)
996
client_config.read(os.path.join(server_settings["configdir"],
997
"clients.conf"))
998
999
clients = Set()
1000
tcp_server = IPv6_TCPServer((server_settings["address"],
1001
server_settings["port"]),
1002
TCP_handler,
1003
settings=server_settings,
1004
clients=clients)
1005
pidfilename = "/var/run/mandos.pid"
1006
try:
1007
pidfile = open(pidfilename, "w")
1008
except IOError, error:
1009
logger.error("Could not open file %r", pidfilename)
1010
1011
try:
1012
uid = pwd.getpwnam("_mandos").pw_uid
1013
gid = pwd.getpwnam("_mandos").pw_gid
1014
except KeyError:
1015
try:
1016
uid = pwd.getpwnam("mandos").pw_uid
1017
gid = pwd.getpwnam("mandos").pw_gid
1018
except KeyError:
1019
try:
1020
uid = pwd.getpwnam("nobody").pw_uid
1021
gid = pwd.getpwnam("nogroup").pw_gid
1022
except KeyError:
1023
uid = 65534
1024
gid = 65534
1025
try:
1026
os.setgid(gid)
1027
os.setuid(uid)
1028
except OSError, error:
1029
if error[0] != errno.EPERM:
1030
raise error
1031
1032
# Enable all possible GnuTLS debugging
1033
if debug:
1034
# "Use a log level over 10 to enable all debugging options."
1035
# - GnuTLS manual
1036
gnutls.library.functions.gnutls_global_set_log_level(11)
1037
1038
@gnutls.library.types.gnutls_log_func
1039
def debug_gnutls(level, string):
1040
logger.debug("GnuTLS: %s", string[:-1])
1041
1042
(gnutls.library.functions
1043
.gnutls_global_set_log_function(debug_gnutls))
1044
1045
global service
1046
service = AvahiService(name = server_settings["servicename"],
1047
servicetype = "_mandos._tcp", )
1048
if server_settings["interface"]:
1049
service.interface = (if_nametoindex
1050
(server_settings["interface"]))
1051
1052
global main_loop
1053
global bus
1054
global server
1055
# From the Avahi example code
613
1056
DBusGMainLoop(set_as_default=True )
614
1057
main_loop = gobject.MainLoop()
615
1058
bus = dbus.SystemBus()
616
server = dbus.Interface(
617
bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
618
avahi.DBUS_INTERFACE_SERVER )
1059
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
1060
avahi.DBUS_PATH_SERVER),
1061
avahi.DBUS_INTERFACE_SERVER)
619
1062
# End of Avahi example code
620
621
debug = options.debug
622
623
if debug:
624
console = logging.StreamHandler()
625
# console.setLevel(logging.DEBUG)
626
console.setFormatter(logging.Formatter\
627
('%(levelname)s: %(message)s'))
628
logger.addHandler(console)
629
del console
630
631
clients = Set()
632
def remove_from_clients(client):
633
clients.remove(client)
634
if not clients:
635
logger.debug(u"No clients left, exiting")
636
killme()
637
638
clients.update(Set(Client(name=section, options=options,
639
stop_hook = remove_from_clients,
640
**(dict(client_config\
641
.items(section))))
1063
if use_dbus:
1064
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
1065
1066
clients.update(Set(Client(name = section,
1067
config
1068
= dict(client_config.items(section)),
1069
use_dbus = use_dbus)
642
1070
for section in client_config.sections()))
643
644
if not debug:
645
daemon(False, False)
1071
if not clients:
1072
logger.warning(u"No clients defined")
1073
1074
if debug:
1075
# Redirect stdin so all checkers get /dev/null
1076
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1077
os.dup2(null, sys.stdin.fileno())
1078
if null > 2:
1079
os.close(null)
1080
else:
1081
# No console logging
1082
logger.removeHandler(console)
1083
# Close all input and output, do double fork, etc.
1084
daemon()
1085
1086
try:
1087
pid = os.getpid()
1088
pidfile.write(str(pid) + "\n")
1089
pidfile.close()
1090
del pidfile
1091
except IOError:
1092
logger.error(u"Could not write to file %r with PID %d",
1093
pidfilename, pid)
1094
except NameError:
1095
# "pidfile" was never created
1096
pass
1097
del pidfilename
646
1098
647
1099
def cleanup():
648
1100
"Cleanup function; run on exit"
649
1101
global group
650
# From the Avahi server example code
1102
# From the Avahi example code
651
1103
if not group is None:
652
1104
group.Free()
653
1105
group = None
654
1106
# End of Avahi example code
655
1107
656
for client in clients:
657
client.stop_hook = None
658
client.stop()
1108
while clients:
1109
client = clients.pop()
1110
client.disable_hook = None
1111
client.disable()
659
1112
660
1113
atexit.register(cleanup)
661
1114
662
1115
if not debug:
663
1116
signal.signal(signal.SIGINT, signal.SIG_IGN)
664
signal.signal(signal.SIGHUP, lambda signum, frame: killme())
665
signal.signal(signal.SIGTERM, lambda signum, frame: killme())
1117
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1118
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1119
1120
if use_dbus:
1121
class MandosServer(dbus.service.Object):
1122
"""A D-Bus proxy object"""
1123
def __init__(self):
1124
dbus.service.Object.__init__(self, bus, "/")
1125
_interface = u"se.bsnet.fukt.Mandos"
1126
1127
@dbus.service.signal(_interface, signature="oa{sv}")
1128
def ClientAdded(self, objpath, properties):
1129
"D-Bus signal"
1130
pass
1131
1132
@dbus.service.signal(_interface, signature="os")
1133
def ClientRemoved(self, objpath, name):
1134
"D-Bus signal"
1135
pass
1136
1137
@dbus.service.method(_interface, out_signature="ao")
1138
def GetAllClients(self):
1139
"D-Bus method"
1140
return dbus.Array(c.dbus_object_path for c in clients)
1141
1142
@dbus.service.method(_interface, out_signature="a{oa{sv}}")
1143
def GetAllClientsWithProperties(self):
1144
"D-Bus method"
1145
return dbus.Dictionary(
1146
((c.dbus_object_path, c.GetAllProperties())
1147
for c in clients),
1148
signature="oa{sv}")
1149
1150
@dbus.service.method(_interface, in_signature="o")
1151
def RemoveClient(self, object_path):
1152
"D-Bus method"
1153
for c in clients:
1154
if c.dbus_object_path == object_path:
1155
clients.remove(c)
1156
# Don't signal anything except ClientRemoved
1157
c.use_dbus = False
1158
c.disable()
1159
# Emit D-Bus signal
1160
self.ClientRemoved(object_path, c.name)
1161
return
1162
raise KeyError
1163
1164
del _interface
1165
1166
mandos_server = MandosServer()
666
1167
667
1168
for client in clients:
668
client.start()
669
670
tcp_server = IPv6_TCPServer((None, options.port),
671
tcp_handler,
672
options=options,
673
clients=clients)
674
# Find out what random port we got
675
servicePort = tcp_server.socket.getsockname()[1]
676
logger.debug(u"Now listening on port %d", servicePort)
677
678
if options.interface is not None:
679
serviceInterface = if_nametoindex(options.interface)
680
681
# From the Avahi server example code
682
server.connect_to_signal("StateChanged", server_state_changed)
683
try:
684
server_state_changed(server.GetState())
685
except dbus.exceptions.DBusException, error:
686
logger.critical(u"DBusException: %s", error)
687
killme(1)
688
# End of Avahi example code
689
690
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
691
lambda *args, **kwargs:
692
tcp_server.handle_request(*args[2:],
693
**kwargs) or True)
694
try:
695
main_loop_started = True
1169
if use_dbus:
1170
# Emit D-Bus signal
1171
mandos_server.ClientAdded(client.dbus_object_path,
1172
client.GetAllProperties())
1173
client.enable()
1174
1175
tcp_server.enable()
1176
tcp_server.server_activate()
1177
1178
# Find out what port we got
1179
service.port = tcp_server.socket.getsockname()[1]
1180
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
1181
u" scope_id %d" % tcp_server.socket.getsockname())
1182
1183
#service.interface = tcp_server.socket.getsockname()[3]
1184
1185
try:
1186
# From the Avahi example code
1187
server.connect_to_signal("StateChanged", server_state_changed)
1188
try:
1189
server_state_changed(server.GetState())
1190
except dbus.exceptions.DBusException, error:
1191
logger.critical(u"DBusException: %s", error)
1192
sys.exit(1)
1193
# End of Avahi example code
1194
1195
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
1196
lambda *args, **kwargs:
1197
(tcp_server.handle_request
1198
(*args[2:], **kwargs) or True))
1199
1200
logger.debug(u"Starting main loop")
696
1201
main_loop.run()
1202
except AvahiError, error:
1203
logger.critical(u"AvahiError: %s", error)
1204
sys.exit(1)
697
1205
except KeyboardInterrupt:
698
1206
if debug:
699
1207
print
700
701
sys.exit(exitstatus)
1208
1209
if __name__ == '__main__':
1210
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0