To get this branch, use:
bzr branch
http://bzr.recompile.se/loggerhead/mandos/trunk
« back to all changes in this revision
Viewing changes to server.py
- browse files at revision 13
- compare with another revision
- download diff
- download tarball
- view history from revision 13
- Committer: Björn Påhlsson
- Date: 2008-07-20 02:52:20 UTC
- Revision ID: belorn@braxen-20080720025220-r5u0388uy9iu23h6
Added following support:
Pluginbased client handler
rewritten Mandos client
Avahi instead of udp server discovery
openpgp encrypted key support
Passprompt stand alone application for direct console input
Added logging for Mandos server
Pluginbased client handler
rewritten Mandos client
Avahi instead of udp server discovery
openpgp encrypted key support
Passprompt stand alone application for direct console input
Added logging for Mandos server
- files added:
- ca.pem
- files removed:
- .bzr-builddeb
- debian
- debian/po
- files renamed:
- clients.conf => mandos-clients.conf
- plugin-runner.c => plugbasedclient.c
- plugins.d/mandos-client.c => plugins.d/mandosclient.c
- plugins.d/password-prompt.c => plugins.d/passprompt.c
- mandos => server.py
- files modified:
- Makefile
added
removed
server.py
1
1
#!/usr/bin/python
2
# -*- mode: python; coding: utf-8 -*-
3
#
4
# Mandos server - give out binary blobs to connecting clients.
5
#
6
# This program is partly derived from an example program for an Avahi
7
# service publisher, downloaded from
8
# <http://avahi.org/wiki/PythonPublishExample>. This includes the
9
# methods "add" and "remove" in the "AvahiService" class, the
10
# "server_state_changed" and "entry_group_state_changed" functions,
11
# and some lines in "main".
12
#
13
# Everything else is
14
# Copyright © 2008,2009 Teddy Hogeborn
15
# Copyright © 2008,2009 Björn Påhlsson
16
#
17
# This program is free software: you can redistribute it and/or modify
18
# it under the terms of the GNU General Public License as published by
19
# the Free Software Foundation, either version 3 of the License, or
20
# (at your option) any later version.
21
#
22
# This program is distributed in the hope that it will be useful,
23
# but WITHOUT ANY WARRANTY; without even the implied warranty of
24
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
25
# GNU General Public License for more details.
26
#
27
# You should have received a copy of the GNU General Public License
28
# along with this program. If not, see
29
# <http://www.gnu.org/licenses/>.
30
#
31
# Contact the authors at <mandos@fukt.bsnet.se>.
32
#
33
2
34
from __future__ import division, with_statement, absolute_import
3
from __future__ import division
35
4
36
5
import SocketServer
37
6
import socket
38
import optparse
7
import select
8
from optparse import OptionParser
39
9
import datetime
40
10
import errno
41
11
import gnutls.crypto
51
21
import signal
52
22
from sets import Set
53
23
import subprocess
54
import atexit
55
import stat
56
import logging
57
import logging.handlers
58
import pwd
59
from contextlib import closing
60
24
61
25
import dbus
62
import dbus.service
63
26
import gobject
64
27
import avahi
65
28
from dbus.mainloop.glib import DBusGMainLoop
66
29
import ctypes
67
import ctypes.util
68
69
version = "1.0.5"
30
31
import logging
32
import logging.handlers
33
34
# logghandler.setFormatter(logging.Formatter('%(levelname)s %(message)s')
70
35
71
36
logger = logging.Logger('mandos')
72
syslogger = (logging.handlers.SysLogHandler
73
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
74
address = "/dev/log"))
75
syslogger.setFormatter(logging.Formatter
76
('Mandos [%(process)d]: %(levelname)s:'
77
' %(message)s'))
78
logger.addHandler(syslogger)
79
80
console = logging.StreamHandler()
81
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
82
' %(levelname)s: %(message)s'))
83
logger.addHandler(console)
84
85
class AvahiError(Exception):
86
def __init__(self, value, *args, **kwargs):
87
self.value = value
88
super(AvahiError, self).__init__(value, *args, **kwargs)
89
def __unicode__(self):
90
return unicode(repr(self.value))
91
92
class AvahiServiceError(AvahiError):
93
pass
94
95
class AvahiGroupError(AvahiError):
96
pass
97
98
99
class AvahiService(object):
100
"""An Avahi (Zeroconf) service.
101
Attributes:
102
interface: integer; avahi.IF_UNSPEC or an interface index.
103
Used to optionally bind to the specified interface.
104
name: string; Example: 'Mandos'
105
type: string; Example: '_mandos._tcp'.
106
See <http://www.dns-sd.org/ServiceTypes.html>
107
port: integer; what port to announce
108
TXT: list of strings; TXT record for the service
109
domain: string; Domain to publish on, default to .local if empty.
110
host: string; Host to publish records for, default is localhost
111
max_renames: integer; maximum number of renames
112
rename_count: integer; counter so we only rename after collisions
113
a sensible number of times
114
"""
115
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
116
servicetype = None, port = None, TXT = None,
117
domain = "", host = "", max_renames = 32768):
118
self.interface = interface
119
self.name = name
120
self.type = servicetype
121
self.port = port
122
self.TXT = TXT if TXT is not None else []
123
self.domain = domain
124
self.host = host
125
self.rename_count = 0
126
self.max_renames = max_renames
127
def rename(self):
128
"""Derived from the Avahi example code"""
129
if self.rename_count >= self.max_renames:
130
logger.critical(u"No suitable Zeroconf service name found"
131
u" after %i retries, exiting.",
132
self.rename_count)
133
raise AvahiServiceError(u"Too many renames")
134
self.name = server.GetAlternativeServiceName(self.name)
135
logger.info(u"Changing Zeroconf service name to %r ...",
136
str(self.name))
137
syslogger.setFormatter(logging.Formatter
138
('Mandos (%s): %%(levelname)s:'
139
' %%(message)s' % self.name))
140
self.remove()
141
self.add()
142
self.rename_count += 1
143
def remove(self):
144
"""Derived from the Avahi example code"""
145
if group is not None:
146
group.Reset()
147
def add(self):
148
"""Derived from the Avahi example code"""
149
global group
150
if group is None:
151
group = dbus.Interface(bus.get_object
152
(avahi.DBUS_NAME,
153
server.EntryGroupNew()),
154
avahi.DBUS_INTERFACE_ENTRY_GROUP)
155
group.connect_to_signal('StateChanged',
156
entry_group_state_changed)
157
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
158
service.name, service.type)
159
group.AddService(
160
self.interface, # interface
161
avahi.PROTO_INET6, # protocol
162
dbus.UInt32(0), # flags
163
self.name, self.type,
164
self.domain, self.host,
165
dbus.UInt16(self.port),
166
avahi.string_array_to_txt_array(self.TXT))
167
group.Commit()
168
169
# From the Avahi example code:
170
group = None # our entry group
37
logger.addHandler(logging.handlers.SysLogHandler(facility = logging.handlers.SysLogHandler.LOG_DAEMON))
38
39
# This variable is used to optionally bind to a specified interface.
40
# It is a global variable to fit in with the other variables from the
41
# Avahi server example code.
42
serviceInterface = avahi.IF_UNSPEC
43
# From the Avahi server example code:
44
serviceName = "Mandos"
45
serviceType = "_mandos._tcp" # http://www.dns-sd.org/ServiceTypes.html
46
servicePort = None # Not known at startup
47
serviceTXT = [] # TXT record for the service
48
domain = "" # Domain to publish on, default to .local
49
host = "" # Host to publish records for, default to localhost
50
group = None #our entry group
51
rename_count = 12 # Counter so we only rename after collisions a
52
# sensible number of times
171
53
# End of Avahi example code
172
54
173
55
174
def _datetime_to_dbus(dt, variant_level=0):
175
"""Convert a UTC datetime.datetime() to a D-Bus type."""
176
return dbus.String(dt.isoformat(), variant_level=variant_level)
177
178
179
class Client(dbus.service.Object):
56
class Client(object):
180
57
"""A representation of a client host served by this server.
181
58
Attributes:
182
name: string; from the config file, used in log messages and
183
D-Bus identifiers
59
name: string; from the config file, used in log messages
184
60
fingerprint: string (40 or 32 hexadecimal digits); used to
185
61
uniquely identify the client
186
secret: bytestring; sent verbatim (over TLS) to client
187
host: string; available for use by the checker command
188
created: datetime.datetime(); (UTC) object creation
189
last_enabled: datetime.datetime(); (UTC)
190
enabled: bool()
191
last_checked_ok: datetime.datetime(); (UTC) or None
192
timeout: datetime.timedelta(); How long from last_checked_ok
193
until this client is invalid
194
interval: datetime.timedelta(); How often to start a new checker
195
disable_hook: If set, called by disable() as disable_hook(self)
196
checker: subprocess.Popen(); a running checker process used
197
to see if the client lives.
198
'None' if no process is running.
62
secret: bytestring; sent verbatim (over TLS) to client
63
fqdn: string (FQDN); available for use by the checker command
64
created: datetime.datetime()
65
last_seen: datetime.datetime() or None if not yet seen
66
timeout: datetime.timedelta(); How long from last_seen until
67
this client is invalid
68
interval: datetime.timedelta(); How often to start a new checker
69
stop_hook: If set, called by stop() as stop_hook(self)
70
checker: subprocess.Popen(); a running checker process used
71
to see if the client lives.
72
Is None if no process is running.
199
73
checker_initiator_tag: a gobject event source tag, or None
200
disable_initiator_tag: - '' -
74
stop_initiator_tag: - '' -
201
75
checker_callback_tag: - '' -
202
76
checker_command: string; External command which is run to check if
203
client lives. %() expansions are done at
77
client lives. %()s expansions are done at
204
78
runtime with vars(self) as dict, so that for
205
79
instance %(name)s can be used in the command.
206
use_dbus: bool(); Whether to provide D-Bus interface and signals
207
dbus_object_path: dbus.ObjectPath ; only set if self.use_dbus
80
Private attibutes:
81
_timeout: Real variable for 'timeout'
82
_interval: Real variable for 'interval'
83
_timeout_milliseconds: Used by gobject.timeout_add()
84
_interval_milliseconds: - '' -
208
85
"""
209
def timeout_milliseconds(self):
210
"Return the 'timeout' attribute in milliseconds"
211
return ((self.timeout.days * 24 * 60 * 60 * 1000)
212
+ (self.timeout.seconds * 1000)
213
+ (self.timeout.microseconds // 1000))
214
215
def interval_milliseconds(self):
216
"Return the 'interval' attribute in milliseconds"
217
return ((self.interval.days * 24 * 60 * 60 * 1000)
218
+ (self.interval.seconds * 1000)
219
+ (self.interval.microseconds // 1000))
220
221
def __init__(self, name = None, disable_hook=None, config=None,
222
use_dbus=True):
223
"""Note: the 'checker' key in 'config' sets the
224
'checker_command' attribute and *not* the 'checker'
225
attribute."""
86
def _set_timeout(self, timeout):
87
"Setter function for 'timeout' attribute"
88
self._timeout = timeout
89
self._timeout_milliseconds = ((self.timeout.days
90
* 24 * 60 * 60 * 1000)
91
+ (self.timeout.seconds * 1000)
92
+ (self.timeout.microseconds
93
// 1000))
94
timeout = property(lambda self: self._timeout,
95
_set_timeout)
96
del _set_timeout
97
def _set_interval(self, interval):
98
"Setter function for 'interval' attribute"
99
self._interval = interval
100
self._interval_milliseconds = ((self.interval.days
101
* 24 * 60 * 60 * 1000)
102
+ (self.interval.seconds
103
* 1000)
104
+ (self.interval.microseconds
105
// 1000))
106
interval = property(lambda self: self._interval,
107
_set_interval)
108
del _set_interval
109
def __init__(self, name=None, options=None, stop_hook=None,
110
fingerprint=None, secret=None, secfile=None, fqdn=None,
111
timeout=None, interval=-1, checker=None):
226
112
self.name = name
227
if config is None:
228
config = {}
229
logger.debug(u"Creating client %r", self.name)
230
self.use_dbus = False # During __init__
231
# Uppercase and remove spaces from fingerprint for later
232
# comparison purposes with return value from the fingerprint()
233
# function
234
self.fingerprint = (config["fingerprint"].upper()
235
.replace(u" ", u""))
236
logger.debug(u" Fingerprint: %s", self.fingerprint)
237
if "secret" in config:
238
self.secret = config["secret"].decode(u"base64")
239
elif "secfile" in config:
240
with closing(open(os.path.expanduser
241
(os.path.expandvars
242
(config["secfile"])))) as secfile:
243
self.secret = secfile.read()
244
else:
245
raise TypeError(u"No secret or secfile for client %s"
246
% self.name)
247
self.host = config.get("host", "")
248
self.created = datetime.datetime.utcnow()
249
self.enabled = False
250
self.last_enabled = None
251
self.last_checked_ok = None
252
self.timeout = string_to_delta(config["timeout"])
253
self.interval = string_to_delta(config["interval"])
254
self.disable_hook = disable_hook
113
# Uppercase and remove spaces from fingerprint
114
# for later comparison purposes with return value of
115
# the fingerprint() function
116
self.fingerprint = fingerprint.upper().replace(u" ", u"")
117
if secret:
118
self.secret = secret.decode(u"base64")
119
elif secfile:
120
sf = open(secfile)
121
self.secret = sf.read()
122
sf.close()
123
else:
124
raise RuntimeError(u"No secret or secfile for client %s"
125
% self.name)
126
self.fqdn = fqdn # string
127
self.created = datetime.datetime.now()
128
self.last_seen = None
129
if timeout is None:
130
timeout = options.timeout
131
self.timeout = timeout
132
if interval == -1:
133
interval = options.interval
134
else:
135
interval = string_to_delta(interval)
136
self.interval = interval
137
self.stop_hook = stop_hook
255
138
self.checker = None
256
139
self.checker_initiator_tag = None
257
self.disable_initiator_tag = None
140
self.stop_initiator_tag = None
258
141
self.checker_callback_tag = None
259
self.checker_command = config["checker"]
260
self.last_connect = None
261
# Only now, when this client is initialized, can it show up on
262
# the D-Bus
263
self.use_dbus = use_dbus
264
if self.use_dbus:
265
self.dbus_object_path = (dbus.ObjectPath
266
("/clients/"
267
+ self.name.replace(".", "_")))
268
dbus.service.Object.__init__(self, bus,
269
self.dbus_object_path)
270
271
def enable(self):
272
"""Start this client's checker and timeout hooks"""
273
self.last_enabled = datetime.datetime.utcnow()
142
self.check_command = checker
143
def start(self):
144
"""Start this clients checker and timeout hooks"""
274
145
# Schedule a new checker to be started an 'interval' from now,
275
146
# and every interval from then on.
276
self.checker_initiator_tag = (gobject.timeout_add
277
(self.interval_milliseconds(),
278
self.start_checker))
147
self.checker_initiator_tag = gobject.timeout_add\
148
(self._interval_milliseconds,
149
self.start_checker)
279
150
# Also start a new checker *right now*.
280
151
self.start_checker()
281
# Schedule a disable() when 'timeout' has passed
282
self.disable_initiator_tag = (gobject.timeout_add
283
(self.timeout_milliseconds(),
284
self.disable))
285
self.enabled = True
286
if self.use_dbus:
287
# Emit D-Bus signals
288
self.PropertyChanged(dbus.String(u"enabled"),
289
dbus.Boolean(True, variant_level=1))
290
self.PropertyChanged(dbus.String(u"last_enabled"),
291
(_datetime_to_dbus(self.last_enabled,
292
variant_level=1)))
293
294
def disable(self):
295
"""Disable this client."""
296
if not getattr(self, "enabled", False):
297
return False
298
logger.info(u"Disabling client %s", self.name)
299
if getattr(self, "disable_initiator_tag", False):
300
gobject.source_remove(self.disable_initiator_tag)
301
self.disable_initiator_tag = None
302
if getattr(self, "checker_initiator_tag", False):
152
# Schedule a stop() when 'timeout' has passed
153
self.stop_initiator_tag = gobject.timeout_add\
154
(self._timeout_milliseconds,
155
self.stop)
156
def stop(self):
157
"""Stop this client.
158
The possibility that this client might be restarted is left
159
open, but not currently used."""
160
logger.debug(u"Stopping client %s", self.name)
161
self.secret = None
162
if self.stop_initiator_tag:
163
gobject.source_remove(self.stop_initiator_tag)
164
self.stop_initiator_tag = None
165
if self.checker_initiator_tag:
303
166
gobject.source_remove(self.checker_initiator_tag)
304
167
self.checker_initiator_tag = None
305
168
self.stop_checker()
306
if self.disable_hook:
307
self.disable_hook(self)
308
self.enabled = False
309
if self.use_dbus:
310
# Emit D-Bus signal
311
self.PropertyChanged(dbus.String(u"enabled"),
312
dbus.Boolean(False, variant_level=1))
169
if self.stop_hook:
170
self.stop_hook(self)
313
171
# Do not run this again if called by a gobject.timeout_add
314
172
return False
315
316
173
def __del__(self):
317
self.disable_hook = None
318
self.disable()
319
320
def checker_callback(self, pid, condition, command):
174
# Some code duplication here and in stop()
175
if hasattr(self, "stop_initiator_tag") \
176
and self.stop_initiator_tag:
177
gobject.source_remove(self.stop_initiator_tag)
178
self.stop_initiator_tag = None
179
if hasattr(self, "checker_initiator_tag") \
180
and self.checker_initiator_tag:
181
gobject.source_remove(self.checker_initiator_tag)
182
self.checker_initiator_tag = None
183
self.stop_checker()
184
def checker_callback(self, pid, condition):
321
185
"""The checker has completed, so take appropriate actions."""
322
self.checker_callback_tag = None
323
self.checker = None
324
if self.use_dbus:
325
# Emit D-Bus signal
326
self.PropertyChanged(dbus.String(u"checker_running"),
327
dbus.Boolean(False, variant_level=1))
328
if os.WIFEXITED(condition):
329
exitstatus = os.WEXITSTATUS(condition)
330
if exitstatus == 0:
331
logger.info(u"Checker for %(name)s succeeded",
332
vars(self))
333
self.checked_ok()
334
else:
335
logger.info(u"Checker for %(name)s failed",
336
vars(self))
337
if self.use_dbus:
338
# Emit D-Bus signal
339
self.CheckerCompleted(dbus.Int16(exitstatus),
340
dbus.Int64(condition),
341
dbus.String(command))
342
else:
186
now = datetime.datetime.now()
187
if os.WIFEXITED(condition) \
188
and (os.WEXITSTATUS(condition) == 0):
189
logger.debug(u"Checker for %(name)s succeeded",
190
vars(self))
191
self.last_seen = now
192
gobject.source_remove(self.stop_initiator_tag)
193
self.stop_initiator_tag = gobject.timeout_add\
194
(self._timeout_milliseconds,
195
self.stop)
196
if not os.WIFEXITED(condition):
343
197
logger.warning(u"Checker for %(name)s crashed?",
344
198
vars(self))
345
if self.use_dbus:
346
# Emit D-Bus signal
347
self.CheckerCompleted(dbus.Int16(-1),
348
dbus.Int64(condition),
349
dbus.String(command))
350
351
def checked_ok(self):
352
"""Bump up the timeout for this client.
353
This should only be called when the client has been seen,
354
alive and well.
355
"""
356
self.last_checked_ok = datetime.datetime.utcnow()
357
gobject.source_remove(self.disable_initiator_tag)
358
self.disable_initiator_tag = (gobject.timeout_add
359
(self.timeout_milliseconds(),
360
self.disable))
361
if self.use_dbus:
362
# Emit D-Bus signal
363
self.PropertyChanged(
364
dbus.String(u"last_checked_ok"),
365
(_datetime_to_dbus(self.last_checked_ok,
366
variant_level=1)))
367
199
else:
200
logger.debug(u"Checker for %(name)s failed",
201
vars(self))
202
self.checker = None
203
self.checker_callback_tag = None
368
204
def start_checker(self):
369
205
"""Start a new checker subprocess if one is not running.
370
206
If a checker already exists, leave it running and do
371
207
nothing."""
372
# The reason for not killing a running checker is that if we
373
# did that, then if a checker (for some reason) started
374
# running slowly and taking more than 'interval' time, the
375
# client would inevitably timeout, since no checker would get
376
# a chance to run to completion. If we instead leave running
377
# checkers alone, the checker would have to take more time
378
# than 'timeout' for the client to be declared invalid, which
379
# is as it should be.
380
208
if self.checker is None:
209
logger.debug(u"Starting checker for %s",
210
self.name)
381
211
try:
382
# In case checker_command has exactly one % operator
383
command = self.checker_command % self.host
212
command = self.check_command % self.fqdn
384
213
except TypeError:
385
# Escape attributes for the shell
386
214
escaped_attrs = dict((key, re.escape(str(val)))
387
215
for key, val in
388
216
vars(self).iteritems())
389
217
try:
390
command = self.checker_command % escaped_attrs
218
command = self.check_command % escaped_attrs
391
219
except TypeError, error:
392
logger.error(u'Could not format string "%s":'
393
u' %s', self.checker_command, error)
220
logger.critical(u'Could not format string "%s": %s',
221
self.check_command, error)
394
222
return True # Try again later
395
223
try:
396
logger.info(u"Starting checker %r for %s",
397
command, self.name)
398
# We don't need to redirect stdout and stderr, since
399
# in normal mode, that is already done by daemon(),
400
# and in debug mode we don't want to. (Stdin is
401
# always replaced by /dev/null.)
402
self.checker = subprocess.Popen(command,
403
close_fds=True,
404
shell=True, cwd="/")
405
if self.use_dbus:
406
# Emit D-Bus signal
407
self.CheckerStarted(command)
408
self.PropertyChanged(
409
dbus.String("checker_running"),
410
dbus.Boolean(True, variant_level=1))
411
self.checker_callback_tag = (gobject.child_watch_add
412
(self.checker.pid,
413
self.checker_callback,
414
data=command))
415
# The checker may have completed before the gobject
416
# watch was added. Check for this.
417
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
418
if pid:
419
gobject.source_remove(self.checker_callback_tag)
420
self.checker_callback(pid, status, command)
421
except OSError, error:
224
self.checker = subprocess.\
225
Popen(command,
226
stdout=subprocess.PIPE,
227
close_fds=True, shell=True,
228
cwd="/")
229
self.checker_callback_tag = gobject.\
230
child_watch_add(self.checker.pid,
231
self.\
232
checker_callback)
233
except subprocess.OSError, error:
422
234
logger.error(u"Failed to start subprocess: %s",
423
235
error)
424
236
# Re-run this periodically if run by gobject.timeout_add
425
237
return True
426
427
238
def stop_checker(self):
428
239
"""Force the checker process, if any, to stop."""
429
if self.checker_callback_tag:
430
gobject.source_remove(self.checker_callback_tag)
431
self.checker_callback_tag = None
432
if getattr(self, "checker", None) is None:
240
if not hasattr(self, "checker") or self.checker is None:
433
241
return
434
logger.debug(u"Stopping checker for %(name)s", vars(self))
435
try:
436
os.kill(self.checker.pid, signal.SIGTERM)
437
#os.sleep(0.5)
438
#if self.checker.poll() is None:
439
# os.kill(self.checker.pid, signal.SIGKILL)
440
except OSError, error:
441
if error.errno != errno.ESRCH: # No such process
442
raise
242
gobject.source_remove(self.checker_callback_tag)
243
self.checker_callback_tag = None
244
os.kill(self.checker.pid, signal.SIGTERM)
245
if self.checker.poll() is None:
246
os.kill(self.checker.pid, signal.SIGKILL)
443
247
self.checker = None
444
if self.use_dbus:
445
self.PropertyChanged(dbus.String(u"checker_running"),
446
dbus.Boolean(False, variant_level=1))
447
448
def still_valid(self):
248
def still_valid(self, now=None):
449
249
"""Has the timeout not yet passed for this client?"""
450
if not getattr(self, "enabled", False):
451
return False
452
now = datetime.datetime.utcnow()
453
if self.last_checked_ok is None:
250
if now is None:
251
now = datetime.datetime.now()
252
if self.last_seen is None:
454
253
return now < (self.created + self.timeout)
455
254
else:
456
return now < (self.last_checked_ok + self.timeout)
457
458
## D-Bus methods & signals
459
_interface = u"se.bsnet.fukt.Mandos.Client"
460
461
# CheckedOK - method
462
CheckedOK = dbus.service.method(_interface)(checked_ok)
463
CheckedOK.__name__ = "CheckedOK"
464
465
# CheckerCompleted - signal
466
@dbus.service.signal(_interface, signature="nxs")
467
def CheckerCompleted(self, exitcode, waitstatus, command):
468
"D-Bus signal"
469
pass
470
471
# CheckerStarted - signal
472
@dbus.service.signal(_interface, signature="s")
473
def CheckerStarted(self, command):
474
"D-Bus signal"
475
pass
476
477
# GetAllProperties - method
478
@dbus.service.method(_interface, out_signature="a{sv}")
479
def GetAllProperties(self):
480
"D-Bus method"
481
return dbus.Dictionary({
482
dbus.String("name"):
483
dbus.String(self.name, variant_level=1),
484
dbus.String("fingerprint"):
485
dbus.String(self.fingerprint, variant_level=1),
486
dbus.String("host"):
487
dbus.String(self.host, variant_level=1),
488
dbus.String("created"):
489
_datetime_to_dbus(self.created, variant_level=1),
490
dbus.String("last_enabled"):
491
(_datetime_to_dbus(self.last_enabled,
492
variant_level=1)
493
if self.last_enabled is not None
494
else dbus.Boolean(False, variant_level=1)),
495
dbus.String("enabled"):
496
dbus.Boolean(self.enabled, variant_level=1),
497
dbus.String("last_checked_ok"):
498
(_datetime_to_dbus(self.last_checked_ok,
499
variant_level=1)
500
if self.last_checked_ok is not None
501
else dbus.Boolean (False, variant_level=1)),
502
dbus.String("timeout"):
503
dbus.UInt64(self.timeout_milliseconds(),
504
variant_level=1),
505
dbus.String("interval"):
506
dbus.UInt64(self.interval_milliseconds(),
507
variant_level=1),
508
dbus.String("checker"):
509
dbus.String(self.checker_command,
510
variant_level=1),
511
dbus.String("checker_running"):
512
dbus.Boolean(self.checker is not None,
513
variant_level=1),
514
dbus.String("object_path"):
515
dbus.ObjectPath(self.dbus_object_path,
516
variant_level=1)
517
}, signature="sv")
518
519
# IsStillValid - method
520
IsStillValid = (dbus.service.method(_interface, out_signature="b")
521
(still_valid))
522
IsStillValid.__name__ = "IsStillValid"
523
524
# PropertyChanged - signal
525
@dbus.service.signal(_interface, signature="sv")
526
def PropertyChanged(self, property, value):
527
"D-Bus signal"
528
pass
529
530
# SetChecker - method
531
@dbus.service.method(_interface, in_signature="s")
532
def SetChecker(self, checker):
533
"D-Bus setter method"
534
self.checker_command = checker
535
# Emit D-Bus signal
536
self.PropertyChanged(dbus.String(u"checker"),
537
dbus.String(self.checker_command,
538
variant_level=1))
539
540
# SetHost - method
541
@dbus.service.method(_interface, in_signature="s")
542
def SetHost(self, host):
543
"D-Bus setter method"
544
self.host = host
545
# Emit D-Bus signal
546
self.PropertyChanged(dbus.String(u"host"),
547
dbus.String(self.host, variant_level=1))
548
549
# SetInterval - method
550
@dbus.service.method(_interface, in_signature="t")
551
def SetInterval(self, milliseconds):
552
self.interval = datetime.timedelta(0, 0, 0, milliseconds)
553
# Emit D-Bus signal
554
self.PropertyChanged(dbus.String(u"interval"),
555
(dbus.UInt64(self.interval_milliseconds(),
556
variant_level=1)))
557
558
# SetSecret - method
559
@dbus.service.method(_interface, in_signature="ay",
560
byte_arrays=True)
561
def SetSecret(self, secret):
562
"D-Bus setter method"
563
self.secret = str(secret)
564
565
# SetTimeout - method
566
@dbus.service.method(_interface, in_signature="t")
567
def SetTimeout(self, milliseconds):
568
self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
569
# Emit D-Bus signal
570
self.PropertyChanged(dbus.String(u"timeout"),
571
(dbus.UInt64(self.timeout_milliseconds(),
572
variant_level=1)))
573
574
# Enable - method
575
Enable = dbus.service.method(_interface)(enable)
576
Enable.__name__ = "Enable"
577
578
# StartChecker - method
579
@dbus.service.method(_interface)
580
def StartChecker(self):
581
"D-Bus method"
582
self.start_checker()
583
584
# Disable - method
585
@dbus.service.method(_interface)
586
def Disable(self):
587
"D-Bus method"
588
self.disable()
589
590
# StopChecker - method
591
StopChecker = dbus.service.method(_interface)(stop_checker)
592
StopChecker.__name__ = "StopChecker"
593
594
del _interface
255
return now < (self.last_seen + self.timeout)
595
256
596
257
597
258
def peer_certificate(session):
598
"Return the peer's OpenPGP certificate as a bytestring"
599
259
# If not an OpenPGP certificate...
600
if (gnutls.library.functions
601
.gnutls_certificate_type_get(session._c_object)
602
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
260
if gnutls.library.functions.gnutls_certificate_type_get\
261
(session._c_object) \
262
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP:
603
263
# ...do the normal thing
604
264
return session.peer_certificate
605
list_size = ctypes.c_uint(1)
606
cert_list = (gnutls.library.functions
607
.gnutls_certificate_get_peers
608
(session._c_object, ctypes.byref(list_size)))
609
if not bool(cert_list) and list_size.value != 0:
610
raise gnutls.errors.GNUTLSError("error getting peer"
611
" certificate")
265
list_size = ctypes.c_uint()
266
cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
267
(session._c_object, ctypes.byref(list_size))
612
268
if list_size.value == 0:
613
269
return None
614
270
cert = cert_list[0]
616
272
617
273
618
274
def fingerprint(openpgp):
619
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
620
# New GnuTLS "datum" with the OpenPGP public key
621
datum = (gnutls.library.types
622
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
623
ctypes.POINTER
624
(ctypes.c_ubyte)),
625
ctypes.c_uint(len(openpgp))))
626
275
# New empty GnuTLS certificate
627
276
crt = gnutls.library.types.gnutls_openpgp_crt_t()
628
(gnutls.library.functions
629
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
277
gnutls.library.functions.gnutls_openpgp_crt_init\
278
(ctypes.byref(crt))
279
# New GnuTLS "datum" with the OpenPGP public key
280
datum = gnutls.library.types.gnutls_datum_t\
281
(ctypes.cast(ctypes.c_char_p(openpgp),
282
ctypes.POINTER(ctypes.c_ubyte)),
283
ctypes.c_uint(len(openpgp)))
630
284
# Import the OpenPGP public key into the certificate
631
(gnutls.library.functions
632
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
633
gnutls.library.constants
634
.GNUTLS_OPENPGP_FMT_RAW))
635
# Verify the self signature in the key
636
crtverify = ctypes.c_uint()
637
(gnutls.library.functions
638
.gnutls_openpgp_crt_verify_self(crt, 0, ctypes.byref(crtverify)))
639
if crtverify.value != 0:
640
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
641
raise gnutls.errors.CertificateSecurityError("Verify failed")
285
ret = gnutls.library.functions.gnutls_openpgp_crt_import\
286
(crt,
287
ctypes.byref(datum),
288
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
642
289
# New buffer for the fingerprint
643
buf = ctypes.create_string_buffer(20)
644
buf_len = ctypes.c_size_t()
290
buffer = ctypes.create_string_buffer(20)
291
buffer_length = ctypes.c_size_t()
645
292
# Get the fingerprint from the certificate into the buffer
646
(gnutls.library.functions
647
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
648
ctypes.byref(buf_len)))
293
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
294
(crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
649
295
# Deinit the certificate
650
296
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
651
297
# Convert the buffer to a Python bytestring
652
fpr = ctypes.string_at(buf, buf_len.value)
298
fpr = ctypes.string_at(buffer, buffer_length.value)
653
299
# Convert the bytestring to hexadecimal notation
654
300
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
655
301
return hex_fpr
656
302
657
303
658
class TCP_handler(SocketServer.BaseRequestHandler, object):
304
class tcp_handler(SocketServer.BaseRequestHandler, object):
659
305
"""A TCP request handler class.
660
306
Instantiated by IPv6_TCPServer for each request to handle it.
661
307
Note: This will run in its own forked process."""
662
308
663
309
def handle(self):
664
logger.info(u"TCP connection from: %s",
665
unicode(self.client_address))
666
session = (gnutls.connection
667
.ClientSession(self.request,
668
gnutls.connection
669
.X509Credentials()))
670
671
line = self.request.makefile().readline()
672
logger.debug(u"Protocol version: %r", line)
673
try:
674
if int(line.strip().split()[0]) > 1:
675
raise RuntimeError
676
except (ValueError, IndexError, RuntimeError), error:
677
logger.error(u"Unknown protocol version: %s", error)
678
return
679
680
# Note: gnutls.connection.X509Credentials is really a generic
681
# GnuTLS certificate credentials object so long as no X.509
682
# keys are added to it. Therefore, we can use it here despite
683
# using OpenPGP certificates.
310
logger.debug(u"TCP connection from: %s",
311
unicode(self.client_address))
312
session = gnutls.connection.ClientSession(self.request,
313
gnutls.connection.\
314
X509Credentials())
684
315
685
316
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
686
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
687
# "+DHE-DSS"))
688
# Use a fallback default, since this MUST be set.
689
priority = self.server.settings.get("priority", "NORMAL")
690
(gnutls.library.functions
691
.gnutls_priority_set_direct(session._c_object,
692
priority, None))
317
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
318
# "+DHE-DSS"))
319
priority = "SECURE256"
320
321
gnutls.library.functions.gnutls_priority_set_direct\
322
(session._c_object, priority, None);
693
323
694
324
try:
695
325
session.handshake()
696
326
except gnutls.errors.GNUTLSError, error:
697
logger.warning(u"Handshake failed: %s", error)
327
logger.debug(u"Handshake failed: %s", error)
698
328
# Do not run session.bye() here: the session is not
699
329
# established. Just abandon the request.
700
330
return
701
logger.debug(u"Handshake succeeded")
702
331
try:
703
332
fpr = fingerprint(peer_certificate(session))
704
333
except (TypeError, gnutls.errors.GNUTLSError), error:
705
logger.warning(u"Bad certificate: %s", error)
334
logger.debug(u"Bad certificate: %s", error)
706
335
session.bye()
707
336
return
708
337
logger.debug(u"Fingerprint: %s", fpr)
709
710
for c in self.server.clients:
338
client = None
339
for c in clients:
711
340
if c.fingerprint == fpr:
712
341
client = c
713
342
break
714
else:
715
logger.warning(u"Client not found for fingerprint: %s",
716
fpr)
717
session.bye()
718
return
719
343
# Have to check if client.still_valid(), since it is possible
720
344
# that the client timed out while establishing the GnuTLS
721
345
# session.
722
if not client.still_valid():
723
logger.warning(u"Client %(name)s is invalid",
724
vars(client))
346
if (not client) or (not client.still_valid()):
347
if client:
348
logger.debug(u"Client %(name)s is invalid",
349
vars(client))
350
else:
351
logger.debug(u"Client not found for fingerprint: %s",
352
fpr)
725
353
session.bye()
726
354
return
727
## This won't work here, since we're in a fork.
728
# client.checked_ok()
729
355
sent_size = 0
730
356
while sent_size < len(client.secret):
731
357
sent = session.send(client.secret[sent_size:])
736
362
session.bye()
737
363
738
364
739
class IPv6_TCPServer(SocketServer.ForkingMixIn,
740
SocketServer.TCPServer, object):
365
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
741
366
"""IPv6 TCP server. Accepts 'None' as address and/or port.
742
367
Attributes:
743
settings: Server settings
368
options: Command line options
744
369
clients: Set() of Client objects
745
enabled: Boolean; whether this server is activated yet
746
370
"""
747
371
address_family = socket.AF_INET6
748
372
def __init__(self, *args, **kwargs):
749
if "settings" in kwargs:
750
self.settings = kwargs["settings"]
751
del kwargs["settings"]
373
if "options" in kwargs:
374
self.options = kwargs["options"]
375
del kwargs["options"]
752
376
if "clients" in kwargs:
753
377
self.clients = kwargs["clients"]
754
378
del kwargs["clients"]
755
self.enabled = False
756
super(IPv6_TCPServer, self).__init__(*args, **kwargs)
379
return super(type(self), self).__init__(*args, **kwargs)
757
380
def server_bind(self):
758
381
"""This overrides the normal server_bind() function
759
382
to bind to an interface if one was specified, and also NOT to
760
383
bind to an address or port if they were not specified."""
761
if self.settings["interface"]:
762
# 25 is from /usr/include/asm-i486/socket.h
763
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
384
if self.options.interface:
385
if not hasattr(socket, "SO_BINDTODEVICE"):
386
# From /usr/include/asm-i486/socket.h
387
socket.SO_BINDTODEVICE = 25
764
388
try:
765
389
self.socket.setsockopt(socket.SOL_SOCKET,
766
SO_BINDTODEVICE,
767
self.settings["interface"])
390
socket.SO_BINDTODEVICE,
391
self.options.interface)
768
392
except socket.error, error:
769
393
if error[0] == errno.EPERM:
770
logger.error(u"No permission to"
771
u" bind to interface %s",
772
self.settings["interface"])
394
logger.warning(u"No permission to"
395
u" bind to interface %s",
396
self.options.interface)
773
397
else:
774
raise
398
raise error
775
399
# Only bind(2) the socket if we really need to.
776
400
if self.server_address[0] or self.server_address[1]:
777
401
if not self.server_address[0]:
778
402
in6addr_any = "::"
779
403
self.server_address = (in6addr_any,
780
404
self.server_address[1])
781
elif not self.server_address[1]:
405
elif self.server_address[1] is None:
782
406
self.server_address = (self.server_address[0],
783
407
0)
784
# if self.settings["interface"]:
785
# self.server_address = (self.server_address[0],
786
# 0, # port
787
# 0, # flowinfo
788
# if_nametoindex
789
# (self.settings
790
# ["interface"]))
791
return super(IPv6_TCPServer, self).server_bind()
792
def server_activate(self):
793
if self.enabled:
794
return super(IPv6_TCPServer, self).server_activate()
795
def enable(self):
796
self.enabled = True
408
return super(type(self), self).server_bind()
797
409
798
410
799
411
def string_to_delta(interval):
800
412
"""Parse a string and return a datetime.timedelta
801
413
802
414
>>> string_to_delta('7d')
803
415
datetime.timedelta(7)
804
416
>>> string_to_delta('60s')
809
421
datetime.timedelta(1)
810
422
>>> string_to_delta(u'1w')
811
423
datetime.timedelta(7)
812
>>> string_to_delta('5m 30s')
813
datetime.timedelta(0, 330)
814
424
"""
815
timevalue = datetime.timedelta(0)
816
for s in interval.split():
817
try:
818
suffix = unicode(s[-1])
819
value = int(s[:-1])
820
if suffix == u"d":
821
delta = datetime.timedelta(value)
822
elif suffix == u"s":
823
delta = datetime.timedelta(0, value)
824
elif suffix == u"m":
825
delta = datetime.timedelta(0, 0, 0, 0, value)
826
elif suffix == u"h":
827
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
828
elif suffix == u"w":
829
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
830
else:
831
raise ValueError
832
except (ValueError, IndexError):
425
try:
426
suffix=unicode(interval[-1])
427
value=int(interval[:-1])
428
if suffix == u"d":
429
delta = datetime.timedelta(value)
430
elif suffix == u"s":
431
delta = datetime.timedelta(0, value)
432
elif suffix == u"m":
433
delta = datetime.timedelta(0, 0, 0, 0, value)
434
elif suffix == u"h":
435
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
436
elif suffix == u"w":
437
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
438
else:
833
439
raise ValueError
834
timevalue += delta
835
return timevalue
440
except (ValueError, IndexError):
441
raise ValueError
442
return delta
443
444
445
def add_service():
446
"""From the Avahi server example code"""
447
global group, serviceName, serviceType, servicePort, serviceTXT, \
448
domain, host
449
if group is None:
450
group = dbus.Interface(
451
bus.get_object( avahi.DBUS_NAME,
452
server.EntryGroupNew()),
453
avahi.DBUS_INTERFACE_ENTRY_GROUP)
454
group.connect_to_signal('StateChanged',
455
entry_group_state_changed)
456
logger.debug(u"Adding service '%s' of type '%s' ...",
457
serviceName, serviceType)
458
459
group.AddService(
460
serviceInterface, # interface
461
avahi.PROTO_INET6, # protocol
462
dbus.UInt32(0), # flags
463
serviceName, serviceType,
464
domain, host,
465
dbus.UInt16(servicePort),
466
avahi.string_array_to_txt_array(serviceTXT))
467
group.Commit()
468
469
470
def remove_service():
471
"""From the Avahi server example code"""
472
global group
473
474
if not group is None:
475
group.Reset()
836
476
837
477
838
478
def server_state_changed(state):
839
"""Derived from the Avahi example code"""
479
"""From the Avahi server example code"""
840
480
if state == avahi.SERVER_COLLISION:
841
logger.error(u"Zeroconf server name collision")
842
service.remove()
481
logger.warning(u"Server name collision")
482
remove_service()
843
483
elif state == avahi.SERVER_RUNNING:
844
service.add()
484
add_service()
845
485
846
486
847
487
def entry_group_state_changed(state, error):
848
"""Derived from the Avahi example code"""
849
logger.debug(u"Avahi state change: %i", state)
488
"""From the Avahi server example code"""
489
global serviceName, server, rename_count
490
491
logger.debug(u"state change: %i", state)
850
492
851
493
if state == avahi.ENTRY_GROUP_ESTABLISHED:
852
logger.debug(u"Zeroconf service established.")
494
logger.debug(u"Service established.")
853
495
elif state == avahi.ENTRY_GROUP_COLLISION:
854
logger.warning(u"Zeroconf service name collision.")
855
service.rename()
496
497
rename_count = rename_count - 1
498
if rename_count > 0:
499
name = server.GetAlternativeServiceName(name)
500
logger.warning(u"Service name collision, "
501
u"changing name to '%s' ...", name)
502
remove_service()
503
add_service()
504
505
else:
506
logger.error(u"No suitable service name found "
507
u"after %i retries, exiting.",
508
n_rename)
509
main_loop.quit()
856
510
elif state == avahi.ENTRY_GROUP_FAILURE:
857
logger.critical(u"Avahi: Error in group state changed %s",
858
unicode(error))
859
raise AvahiGroupError(u"State changed: %s" % unicode(error))
511
logger.error(u"Error in group state changed %s",
512
unicode(error))
513
main_loop.quit()
514
return
515
860
516
861
517
def if_nametoindex(interface):
862
"""Call the C function if_nametoindex(), or equivalent"""
863
global if_nametoindex
518
"""Call the C function if_nametoindex()"""
864
519
try:
865
if_nametoindex = (ctypes.cdll.LoadLibrary
866
(ctypes.util.find_library("c"))
867
.if_nametoindex)
520
libc = ctypes.cdll.LoadLibrary("libc.so.6")
521
return libc.if_nametoindex(interface)
868
522
except (OSError, AttributeError):
869
523
if "struct" not in sys.modules:
870
524
import struct
871
525
if "fcntl" not in sys.modules:
872
526
import fcntl
873
def if_nametoindex(interface):
874
"Get an interface index the hard way, i.e. using fcntl()"
875
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
876
with closing(socket.socket()) as s:
877
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
878
struct.pack("16s16x", interface))
879
interface_index = struct.unpack("I", ifreq[16:20])[0]
880
return interface_index
881
return if_nametoindex(interface)
882
883
884
def daemon(nochdir = False, noclose = False):
885
"""See daemon(3). Standard BSD Unix function.
886
This should really exist as os.daemon, but it doesn't (yet)."""
887
if os.fork():
888
sys.exit()
889
os.setsid()
890
if not nochdir:
891
os.chdir("/")
892
if os.fork():
893
sys.exit()
894
if not noclose:
895
# Close all standard open file descriptors
896
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
897
if not stat.S_ISCHR(os.fstat(null).st_mode):
898
raise OSError(errno.ENODEV,
899
"/dev/null not a character device")
900
os.dup2(null, sys.stdin.fileno())
901
os.dup2(null, sys.stdout.fileno())
902
os.dup2(null, sys.stderr.fileno())
903
if null > 2:
904
os.close(null)
905
906
907
def main():
908
parser = optparse.OptionParser(version = "%%prog %s" % version)
527
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
528
s = socket.socket()
529
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
530
struct.pack("16s16x", interface))
531
s.close()
532
interface_index = struct.unpack("I", ifreq[16:20])[0]
533
return interface_index
534
535
536
if __name__ == '__main__':
537
parser = OptionParser()
909
538
parser.add_option("-i", "--interface", type="string",
910
metavar="IF", help="Bind to interface IF")
911
parser.add_option("-a", "--address", type="string",
912
help="Address to listen for requests on")
913
parser.add_option("-p", "--port", type="int",
539
default=None, metavar="IF",
540
help="Bind to interface IF")
541
parser.add_option("--cert", type="string", default="cert.pem",
542
metavar="FILE",
543
help="Public key certificate PEM file to use")
544
parser.add_option("--key", type="string", default="key.pem",
545
metavar="FILE",
546
help="Private key PEM file to use")
547
parser.add_option("--ca", type="string", default="ca.pem",
548
metavar="FILE",
549
help="Certificate Authority certificate PEM file to use")
550
parser.add_option("--crl", type="string", default="crl.pem",
551
metavar="FILE",
552
help="Certificate Revokation List PEM file to use")
553
parser.add_option("-p", "--port", type="int", default=None,
914
554
help="Port number to receive requests on")
915
parser.add_option("--check", action="store_true",
555
parser.add_option("--timeout", type="string", # Parsed later
556
default="1h",
557
help="Amount of downtime allowed for clients")
558
parser.add_option("--interval", type="string", # Parsed later
559
default="5m",
560
help="How often to check that a client is up")
561
parser.add_option("--check", action="store_true", default=False,
916
562
help="Run self-test")
917
parser.add_option("--debug", action="store_true",
918
help="Debug mode; run in foreground and log to"
919
" terminal")
920
parser.add_option("--priority", type="string", help="GnuTLS"
921
" priority string (see GnuTLS documentation)")
922
parser.add_option("--servicename", type="string", metavar="NAME",
923
help="Zeroconf service name")
924
parser.add_option("--configdir", type="string",
925
default="/etc/mandos", metavar="DIR",
926
help="Directory to search for configuration"
927
" files")
928
parser.add_option("--no-dbus", action="store_false",
929
dest="use_dbus",
930
help="Do not provide D-Bus system bus"
931
" interface")
932
options = parser.parse_args()[0]
563
parser.add_option("--debug", action="store_true", default=False,
564
help="Debug mode")
565
(options, args) = parser.parse_args()
933
566
934
567
if options.check:
935
568
import doctest
936
569
doctest.testmod()
937
570
sys.exit()
938
571
939
# Default values for config file for server-global settings
940
server_defaults = { "interface": "",
941
"address": "",
942
"port": "",
943
"debug": "False",
944
"priority":
945
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
946
"servicename": "Mandos",
947
"use_dbus": "True",
948
}
949
950
# Parse config file for server-global settings
951
server_config = ConfigParser.SafeConfigParser(server_defaults)
952
del server_defaults
953
server_config.read(os.path.join(options.configdir, "mandos.conf"))
954
# Convert the SafeConfigParser object to a dict
955
server_settings = server_config.defaults()
956
# Use the appropriate methods on the non-string config options
957
server_settings["debug"] = server_config.getboolean("DEFAULT",
958
"debug")
959
server_settings["use_dbus"] = server_config.getboolean("DEFAULT",
960
"use_dbus")
961
if server_settings["port"]:
962
server_settings["port"] = server_config.getint("DEFAULT",
963
"port")
964
del server_config
965
966
# Override the settings from the config file with command line
967
# options, if set.
968
for option in ("interface", "address", "port", "debug",
969
"priority", "servicename", "configdir",
970
"use_dbus"):
971
value = getattr(options, option)
972
if value is not None:
973
server_settings[option] = value
974
del options
975
# Now we have our good server settings in "server_settings"
976
977
# For convenience
978
debug = server_settings["debug"]
979
use_dbus = server_settings["use_dbus"]
980
981
if not debug:
982
syslogger.setLevel(logging.WARNING)
983
console.setLevel(logging.WARNING)
984
985
if server_settings["servicename"] != "Mandos":
986
syslogger.setFormatter(logging.Formatter
987
('Mandos (%s): %%(levelname)s:'
988
' %%(message)s'
989
% server_settings["servicename"]))
990
991
# Parse config file with clients
992
client_defaults = { "timeout": "1h",
993
"interval": "5m",
994
"checker": "fping -q -- %%(host)s",
995
"host": "",
996
}
997
client_config = ConfigParser.SafeConfigParser(client_defaults)
998
client_config.read(os.path.join(server_settings["configdir"],
999
"clients.conf"))
1000
1001
clients = Set()
1002
tcp_server = IPv6_TCPServer((server_settings["address"],
1003
server_settings["port"]),
1004
TCP_handler,
1005
settings=server_settings,
1006
clients=clients)
1007
pidfilename = "/var/run/mandos.pid"
1008
try:
1009
pidfile = open(pidfilename, "w")
1010
except IOError:
1011
logger.error("Could not open file %r", pidfilename)
1012
1013
try:
1014
uid = pwd.getpwnam("_mandos").pw_uid
1015
gid = pwd.getpwnam("_mandos").pw_gid
1016
except KeyError:
1017
try:
1018
uid = pwd.getpwnam("mandos").pw_uid
1019
gid = pwd.getpwnam("mandos").pw_gid
1020
except KeyError:
1021
try:
1022
uid = pwd.getpwnam("nobody").pw_uid
1023
gid = pwd.getpwnam("nogroup").pw_gid
1024
except KeyError:
1025
uid = 65534
1026
gid = 65534
1027
try:
1028
os.setgid(gid)
1029
os.setuid(uid)
1030
except OSError, error:
1031
if error[0] != errno.EPERM:
1032
raise error
1033
1034
# Enable all possible GnuTLS debugging
1035
if debug:
1036
# "Use a log level over 10 to enable all debugging options."
1037
# - GnuTLS manual
1038
gnutls.library.functions.gnutls_global_set_log_level(11)
1039
1040
@gnutls.library.types.gnutls_log_func
1041
def debug_gnutls(level, string):
1042
logger.debug("GnuTLS: %s", string[:-1])
1043
1044
(gnutls.library.functions
1045
.gnutls_global_set_log_function(debug_gnutls))
1046
1047
global service
1048
service = AvahiService(name = server_settings["servicename"],
1049
servicetype = "_mandos._tcp", )
1050
if server_settings["interface"]:
1051
service.interface = (if_nametoindex
1052
(server_settings["interface"]))
1053
1054
global main_loop
1055
global bus
1056
global server
1057
# From the Avahi example code
572
# Parse the time arguments
573
try:
574
options.timeout = string_to_delta(options.timeout)
575
except ValueError:
576
parser.error("option --timeout: Unparseable time")
577
try:
578
options.interval = string_to_delta(options.interval)
579
except ValueError:
580
parser.error("option --interval: Unparseable time")
581
582
# Parse config file
583
defaults = { "checker": "sleep 1; fping -q -- %%(fqdn)s" }
584
client_config = ConfigParser.SafeConfigParser(defaults)
585
#client_config.readfp(open("secrets.conf"), "secrets.conf")
586
client_config.read("mandos-clients.conf")
587
588
# From the Avahi server example code
1058
589
DBusGMainLoop(set_as_default=True )
1059
590
main_loop = gobject.MainLoop()
1060
591
bus = dbus.SystemBus()
1061
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
1062
avahi.DBUS_PATH_SERVER),
1063
avahi.DBUS_INTERFACE_SERVER)
592
server = dbus.Interface(
593
bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
594
avahi.DBUS_INTERFACE_SERVER )
1064
595
# End of Avahi example code
1065
if use_dbus:
1066
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
1067
1068
clients.update(Set(Client(name = section,
1069
config
1070
= dict(client_config.items(section)),
1071
use_dbus = use_dbus)
596
597
debug = options.debug
598
599
clients = Set()
600
def remove_from_clients(client):
601
clients.remove(client)
602
if not clients:
603
logger.debug(u"No clients left, exiting")
604
main_loop.quit()
605
606
clients.update(Set(Client(name=section, options=options,
607
stop_hook = remove_from_clients,
608
**(dict(client_config\
609
.items(section))))
1072
610
for section in client_config.sections()))
1073
if not clients:
1074
logger.warning(u"No clients defined")
1075
1076
if debug:
1077
# Redirect stdin so all checkers get /dev/null
1078
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1079
os.dup2(null, sys.stdin.fileno())
1080
if null > 2:
1081
os.close(null)
1082
else:
1083
# No console logging
1084
logger.removeHandler(console)
1085
# Close all input and output, do double fork, etc.
1086
daemon()
1087
1088
try:
1089
pid = os.getpid()
1090
pidfile.write(str(pid) + "\n")
1091
pidfile.close()
1092
del pidfile
1093
except IOError:
1094
logger.error(u"Could not write to file %r with PID %d",
1095
pidfilename, pid)
1096
except NameError:
1097
# "pidfile" was never created
1098
pass
1099
del pidfilename
1100
1101
def cleanup():
1102
"Cleanup function; run on exit"
1103
global group
1104
# From the Avahi example code
1105
if not group is None:
1106
group.Free()
1107
group = None
1108
# End of Avahi example code
1109
1110
while clients:
1111
client = clients.pop()
1112
client.disable_hook = None
1113
client.disable()
1114
1115
atexit.register(cleanup)
1116
1117
if not debug:
1118
signal.signal(signal.SIGINT, signal.SIG_IGN)
1119
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1120
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1121
1122
if use_dbus:
1123
class MandosServer(dbus.service.Object):
1124
"""A D-Bus proxy object"""
1125
def __init__(self):
1126
dbus.service.Object.__init__(self, bus, "/")
1127
_interface = u"se.bsnet.fukt.Mandos"
1128
1129
@dbus.service.signal(_interface, signature="oa{sv}")
1130
def ClientAdded(self, objpath, properties):
1131
"D-Bus signal"
1132
pass
1133
1134
@dbus.service.signal(_interface, signature="os")
1135
def ClientRemoved(self, objpath, name):
1136
"D-Bus signal"
1137
pass
1138
1139
@dbus.service.method(_interface, out_signature="ao")
1140
def GetAllClients(self):
1141
"D-Bus method"
1142
return dbus.Array(c.dbus_object_path for c in clients)
1143
1144
@dbus.service.method(_interface, out_signature="a{oa{sv}}")
1145
def GetAllClientsWithProperties(self):
1146
"D-Bus method"
1147
return dbus.Dictionary(
1148
((c.dbus_object_path, c.GetAllProperties())
1149
for c in clients),
1150
signature="oa{sv}")
1151
1152
@dbus.service.method(_interface, in_signature="o")
1153
def RemoveClient(self, object_path):
1154
"D-Bus method"
1155
for c in clients:
1156
if c.dbus_object_path == object_path:
1157
clients.remove(c)
1158
# Don't signal anything except ClientRemoved
1159
c.use_dbus = False
1160
c.disable()
1161
# Emit D-Bus signal
1162
self.ClientRemoved(object_path, c.name)
1163
return
1164
raise KeyError
1165
1166
del _interface
1167
1168
mandos_server = MandosServer()
1169
1170
611
for client in clients:
1171
if use_dbus:
1172
# Emit D-Bus signal
1173
mandos_server.ClientAdded(client.dbus_object_path,
1174
client.GetAllProperties())
1175
client.enable()
1176
1177
tcp_server.enable()
1178
tcp_server.server_activate()
1179
1180
# Find out what port we got
1181
service.port = tcp_server.socket.getsockname()[1]
1182
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
1183
u" scope_id %d" % tcp_server.socket.getsockname())
1184
1185
#service.interface = tcp_server.socket.getsockname()[3]
1186
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)
1187
634
try:
1188
# From the Avahi example code
1189
server.connect_to_signal("StateChanged", server_state_changed)
1190
try:
1191
server_state_changed(server.GetState())
1192
except dbus.exceptions.DBusException, error:
1193
logger.critical(u"DBusException: %s", error)
1194
sys.exit(1)
1195
# End of Avahi example code
1196
1197
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
1198
lambda *args, **kwargs:
1199
(tcp_server.handle_request
1200
(*args[2:], **kwargs) or True))
1201
1202
logger.debug(u"Starting main loop")
1203
635
main_loop.run()
1204
except AvahiError, error:
1205
logger.critical(u"AvahiError: %s", error)
1206
sys.exit(1)
1207
636
except KeyboardInterrupt:
1208
if debug:
1209
print >> sys.stderr
1210
logger.debug("Server received KeyboardInterrupt")
1211
logger.debug("Server exiting")
637
print
638
639
# Cleanup here
1212
640
1213
if __name__ == '__main__':
1214
main()
641
# From the Avahi server example code
642
if not group is None:
643
group.Free()
644
# End of Avahi example code
645
646
for client in clients:
647
client.stop_hook = None
648
client.stop()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0