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- Committer: Björn Påhlsson
- Date: 2008-07-20 02:52:20 UTC
- Revision ID: belorn@braxen-20080720025220-r5u0388uy9iu23h6
Added following support:
Pluginbased client handler
rewritten Mandos client
Avahi instead of udp server discovery
openpgp encrypted key support
Passprompt stand alone application for direct console input
Added logging for Mandos server
Pluginbased client handler
rewritten Mandos client
Avahi instead of udp server discovery
openpgp encrypted key support
Passprompt stand alone application for direct console input
Added logging for Mandos server
- files added:
- ca.pem
- files removed:
- .bzr-builddeb
- debian
- debian/po
- files renamed:
- clients.conf => mandos-clients.conf
- plugin-runner.c => plugbasedclient.c
- plugins.d/mandos-client.c => plugins.d/mandosclient.c
- plugins.d/password-prompt.c => plugins.d/passprompt.c
- mandos => server.py
- files modified:
- Makefile
added
removed
server.py
1
1
#!/usr/bin/python
2
# -*- mode: python; coding: utf-8 -*-
3
#
4
# Mandos server - give out binary blobs to connecting clients.
5
#
6
# This program is partly derived from an example program for an Avahi
7
# service publisher, downloaded from
8
# <http://avahi.org/wiki/PythonPublishExample>. This includes the
9
# methods "add" and "remove" in the "AvahiService" class, the
10
# "server_state_changed" and "entry_group_state_changed" functions,
11
# and some lines in "main".
12
#
13
# Everything else is
14
# Copyright © 2008 Teddy Hogeborn
15
# Copyright © 2008 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
7
import select
38
8
from optparse import OptionParser
39
9
import datetime
40
10
import errno
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 = "1.0.2"
30
31
import logging
32
import logging.handlers
33
34
# logghandler.setFormatter(logging.Formatter('%(levelname)s %(message)s')
70
35
71
36
logger = logging.Logger('mandos')
72
syslogger = (logging.handlers.SysLogHandler
73
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
74
address = "/dev/log"))
75
syslogger.setFormatter(logging.Formatter
76
('Mandos: %(levelname)s: %(message)s'))
77
logger.addHandler(syslogger)
78
79
console = logging.StreamHandler()
80
console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
81
' %(message)s'))
82
logger.addHandler(console)
83
84
class AvahiError(Exception):
85
def __init__(self, value):
86
self.value = value
87
super(AvahiError, self).__init__()
88
def __str__(self):
89
return 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("Too many renames")
133
self.name = server.GetAlternativeServiceName(self.name)
134
logger.info(u"Changing Zeroconf service name to %r ...",
135
str(self.name))
136
syslogger.setFormatter(logging.Formatter
137
('Mandos (%s): %%(levelname)s:'
138
' %%(message)s' % self.name))
139
self.remove()
140
self.add()
141
self.rename_count += 1
142
def remove(self):
143
"""Derived from the Avahi example code"""
144
if group is not None:
145
group.Reset()
146
def add(self):
147
"""Derived from the Avahi example code"""
148
global group
149
if group is None:
150
group = dbus.Interface(bus.get_object
151
(avahi.DBUS_NAME,
152
server.EntryGroupNew()),
153
avahi.DBUS_INTERFACE_ENTRY_GROUP)
154
group.connect_to_signal('StateChanged',
155
entry_group_state_changed)
156
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
157
service.name, service.type)
158
group.AddService(
159
self.interface, # interface
160
avahi.PROTO_INET6, # protocol
161
dbus.UInt32(0), # flags
162
self.name, self.type,
163
self.domain, self.host,
164
dbus.UInt16(self.port),
165
avahi.string_array_to_txt_array(self.TXT))
166
group.Commit()
167
168
# From the Avahi example code:
169
group = None # our entry group
37
logger.addHandler(logging.handlers.SysLogHandler(facility = logging.handlers.SysLogHandler.LOG_DAEMON))
38
39
# This variable is used to optionally bind to a specified interface.
40
# It is a global variable to fit in with the other variables from the
41
# Avahi server example code.
42
serviceInterface = avahi.IF_UNSPEC
43
# From the Avahi server example code:
44
serviceName = "Mandos"
45
serviceType = "_mandos._tcp" # http://www.dns-sd.org/ServiceTypes.html
46
servicePort = None # Not known at startup
47
serviceTXT = [] # TXT record for the service
48
domain = "" # Domain to publish on, default to .local
49
host = "" # Host to publish records for, default to localhost
50
group = None #our entry group
51
rename_count = 12 # Counter so we only rename after collisions a
52
# sensible number of times
170
53
# End of Avahi example code
171
54
172
55
173
def _datetime_to_dbus_struct(dt, variant_level=0):
174
"""Convert a UTC datetime.datetime() to a D-Bus struct.
175
The format is special to this application, since we could not find
176
any other standard way."""
177
return dbus.Struct((dbus.Int16(dt.year),
178
dbus.Byte(dt.month),
179
dbus.Byte(dt.day),
180
dbus.Byte(dt.hour),
181
dbus.Byte(dt.minute),
182
dbus.Byte(dt.second),
183
dbus.UInt32(dt.microsecond)),
184
signature="nyyyyyu",
185
variant_level=variant_level)
186
187
188
class Client(dbus.service.Object):
56
class Client(object):
189
57
"""A representation of a client host served by this server.
190
58
Attributes:
191
name: string; from the config file, used in log messages
59
name: string; from the config file, used in log messages
192
60
fingerprint: string (40 or 32 hexadecimal digits); used to
193
61
uniquely identify the client
194
secret: bytestring; sent verbatim (over TLS) to client
195
host: string; available for use by the checker command
196
created: datetime.datetime(); (UTC) object creation
197
last_started: datetime.datetime(); (UTC)
198
started: bool()
199
last_checked_ok: datetime.datetime(); (UTC) or None
200
timeout: datetime.timedelta(); How long from last_checked_ok
201
until this client is invalid
202
interval: datetime.timedelta(); How often to start a new checker
203
stop_hook: If set, called by stop() as stop_hook(self)
204
checker: subprocess.Popen(); a running checker process used
205
to see if the client lives.
206
'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.
207
73
checker_initiator_tag: a gobject event source tag, or None
208
74
stop_initiator_tag: - '' -
209
75
checker_callback_tag: - '' -
210
76
checker_command: string; External command which is run to check if
211
client lives. %() expansions are done at
77
client lives. %()s expansions are done at
212
78
runtime with vars(self) as dict, so that for
213
79
instance %(name)s can be used in the command.
214
dbus_object_path: dbus.ObjectPath
215
80
Private attibutes:
216
81
_timeout: Real variable for 'timeout'
217
82
_interval: Real variable for 'interval'
218
_timeout_milliseconds: Used when calling gobject.timeout_add()
83
_timeout_milliseconds: Used by gobject.timeout_add()
219
84
_interval_milliseconds: - '' -
220
85
"""
221
86
def _set_timeout(self, timeout):
222
"Setter function for the 'timeout' attribute"
87
"Setter function for 'timeout' attribute"
223
88
self._timeout = timeout
224
89
self._timeout_milliseconds = ((self.timeout.days
225
90
* 24 * 60 * 60 * 1000)
226
91
+ (self.timeout.seconds * 1000)
227
92
+ (self.timeout.microseconds
228
93
// 1000))
229
# Emit D-Bus signal
230
self.PropertyChanged(dbus.String(u"timeout"),
231
(dbus.UInt64(self._timeout_milliseconds,
232
variant_level=1)))
233
timeout = property(lambda self: self._timeout, _set_timeout)
94
timeout = property(lambda self: self._timeout,
95
_set_timeout)
234
96
del _set_timeout
235
236
97
def _set_interval(self, interval):
237
"Setter function for the 'interval' attribute"
98
"Setter function for 'interval' attribute"
238
99
self._interval = interval
239
100
self._interval_milliseconds = ((self.interval.days
240
101
* 24 * 60 * 60 * 1000)
242
103
* 1000)
243
104
+ (self.interval.microseconds
244
105
// 1000))
245
# Emit D-Bus signal
246
self.PropertyChanged(dbus.String(u"interval"),
247
(dbus.UInt64(self._interval_milliseconds,
248
variant_level=1)))
249
interval = property(lambda self: self._interval, _set_interval)
106
interval = property(lambda self: self._interval,
107
_set_interval)
250
108
del _set_interval
251
252
def __init__(self, name = None, stop_hook=None, config=None):
253
"""Note: the 'checker' key in 'config' sets the
254
'checker_command' attribute and *not* the 'checker'
255
attribute."""
256
self.dbus_object_path = (dbus.ObjectPath
257
("/Mandos/clients/"
258
+ name.replace(".", "_")))
259
dbus.service.Object.__init__(self, bus,
260
self.dbus_object_path)
261
if config is None:
262
config = {}
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):
263
112
self.name = name
264
logger.debug(u"Creating client %r", self.name)
265
# Uppercase and remove spaces from fingerprint for later
266
# comparison purposes with return value from the fingerprint()
267
# function
268
self.fingerprint = (config["fingerprint"].upper()
269
.replace(u" ", u""))
270
logger.debug(u" Fingerprint: %s", self.fingerprint)
271
if "secret" in config:
272
self.secret = config["secret"].decode(u"base64")
273
elif "secfile" in config:
274
with closing(open(os.path.expanduser
275
(os.path.expandvars
276
(config["secfile"])))) as secfile:
277
self.secret = secfile.read()
278
else:
279
raise TypeError(u"No secret or secfile for client %s"
280
% self.name)
281
self.host = config.get("host", "")
282
self.created = datetime.datetime.utcnow()
283
self.started = False
284
self.last_started = None
285
self.last_checked_ok = None
286
self.timeout = string_to_delta(config["timeout"])
287
self.interval = string_to_delta(config["interval"])
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
288
137
self.stop_hook = stop_hook
289
138
self.checker = None
290
139
self.checker_initiator_tag = None
291
140
self.stop_initiator_tag = None
292
141
self.checker_callback_tag = None
293
self.checker_command = config["checker"]
294
142
self.check_command = checker
295
143
def start(self):
296
"""Start this client's checker and timeout hooks"""
297
self.last_started = datetime.datetime.utcnow()
144
"""Start this clients checker and timeout hooks"""
298
145
# Schedule a new checker to be started an 'interval' from now,
299
146
# and every interval from then on.
300
self.checker_initiator_tag = (gobject.timeout_add
301
(self._interval_milliseconds,
302
self.start_checker))
147
self.checker_initiator_tag = gobject.timeout_add\
148
(self._interval_milliseconds,
149
self.start_checker)
303
150
# Also start a new checker *right now*.
304
151
self.start_checker()
305
152
# Schedule a stop() when 'timeout' has passed
306
self.stop_initiator_tag = (gobject.timeout_add
307
(self._timeout_milliseconds,
308
self.stop))
309
self.started = True
310
# Emit D-Bus signal
311
self.PropertyChanged(dbus.String(u"started"),
312
dbus.Boolean(True, variant_level=1))
313
self.PropertyChanged(dbus.String(u"last_started"),
314
(_datetime_to_dbus_struct
315
(self.last_started, variant_level=1)))
316
153
self.stop_initiator_tag = gobject.timeout_add\
154
(self._timeout_milliseconds,
155
self.stop)
317
156
def stop(self):
318
"""Stop this client."""
319
if not getattr(self, "started", False):
320
return False
321
logger.info(u"Stopping client %s", self.name)
322
if getattr(self, "stop_initiator_tag", False):
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:
323
163
gobject.source_remove(self.stop_initiator_tag)
324
164
self.stop_initiator_tag = None
325
if getattr(self, "checker_initiator_tag", False):
165
if self.checker_initiator_tag:
326
166
gobject.source_remove(self.checker_initiator_tag)
327
167
self.checker_initiator_tag = None
328
168
self.stop_checker()
329
169
if self.stop_hook:
330
170
self.stop_hook(self)
331
self.started = False
332
# Emit D-Bus signal
333
self.PropertyChanged(dbus.String(u"started"),
334
dbus.Boolean(False, variant_level=1))
335
171
# Do not run this again if called by a gobject.timeout_add
336
172
return False
337
338
173
def __del__(self):
339
self.stop_hook = None
340
self.stop()
341
342
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):
343
185
"""The checker has completed, so take appropriate actions."""
344
self.checker_callback_tag = None
345
self.checker = None
346
# Emit D-Bus signal
347
self.PropertyChanged(dbus.String(u"checker_running"),
348
dbus.Boolean(False, variant_level=1))
349
if (os.WIFEXITED(condition)
350
and (os.WEXITSTATUS(condition) == 0)):
351
logger.info(u"Checker for %(name)s succeeded",
352
vars(self))
353
# Emit D-Bus signal
354
self.CheckerCompleted(dbus.Boolean(True),
355
dbus.UInt16(condition),
356
dbus.String(command))
357
self.bump_timeout()
358
elif not os.WIFEXITED(condition):
186
now = datetime.datetime.now()
187
if os.WIFEXITED(condition) \
188
and (os.WEXITSTATUS(condition) == 0):
189
logger.debug(u"Checker for %(name)s succeeded",
190
vars(self))
191
self.last_seen = now
192
gobject.source_remove(self.stop_initiator_tag)
193
self.stop_initiator_tag = gobject.timeout_add\
194
(self._timeout_milliseconds,
195
self.stop)
196
if not os.WIFEXITED(condition):
359
197
logger.warning(u"Checker for %(name)s crashed?",
360
198
vars(self))
361
# Emit D-Bus signal
362
self.CheckerCompleted(dbus.Boolean(False),
363
dbus.UInt16(condition),
364
dbus.String(command))
365
199
else:
366
logger.info(u"Checker for %(name)s failed",
367
vars(self))
368
# Emit D-Bus signal
369
self.CheckerCompleted(dbus.Boolean(False),
370
dbus.UInt16(condition),
371
dbus.String(command))
372
373
def bump_timeout(self):
374
"""Bump up the timeout for this client.
375
This should only be called when the client has been seen,
376
alive and well.
377
"""
378
self.last_checked_ok = datetime.datetime.utcnow()
379
gobject.source_remove(self.stop_initiator_tag)
380
self.stop_initiator_tag = (gobject.timeout_add
381
(self._timeout_milliseconds,
382
self.stop))
383
self.PropertyChanged(dbus.String(u"last_checked_ok"),
384
(_datetime_to_dbus_struct
385
(self.last_checked_ok,
386
variant_level=1)))
387
200
logger.debug(u"Checker for %(name)s failed",
201
vars(self))
202
self.checker = None
203
self.checker_callback_tag = None
388
204
def start_checker(self):
389
205
"""Start a new checker subprocess if one is not running.
390
206
If a checker already exists, leave it running and do
391
207
nothing."""
392
# The reason for not killing a running checker is that if we
393
# did that, then if a checker (for some reason) started
394
# running slowly and taking more than 'interval' time, the
395
# client would inevitably timeout, since no checker would get
396
# a chance to run to completion. If we instead leave running
397
# checkers alone, the checker would have to take more time
398
# than 'timeout' for the client to be declared invalid, which
399
# is as it should be.
400
208
if self.checker is None:
209
logger.debug(u"Starting checker for %s",
210
self.name)
401
211
try:
402
# In case checker_command has exactly one % operator
403
command = self.checker_command % self.host
212
command = self.check_command % self.fqdn
404
213
except TypeError:
405
# Escape attributes for the shell
406
214
escaped_attrs = dict((key, re.escape(str(val)))
407
215
for key, val in
408
216
vars(self).iteritems())
409
217
try:
410
command = self.checker_command % escaped_attrs
218
command = self.check_command % escaped_attrs
411
219
except TypeError, error:
412
logger.error(u'Could not format string "%s":'
413
u' %s', self.checker_command, error)
220
logger.critical(u'Could not format string "%s": %s',
221
self.check_command, error)
414
222
return True # Try again later
415
223
try:
416
logger.info(u"Starting checker %r for %s",
417
command, self.name)
418
# We don't need to redirect stdout and stderr, since
419
# in normal mode, that is already done by daemon(),
420
# and in debug mode we don't want to. (Stdin is
421
# always replaced by /dev/null.)
422
self.checker = subprocess.Popen(command,
423
close_fds=True,
424
shell=True, cwd="/")
425
# Emit D-Bus signal
426
self.CheckerStarted(command)
427
self.PropertyChanged(dbus.String("checker_running"),
428
dbus.Boolean(True, variant_level=1))
429
self.checker_callback_tag = (gobject.child_watch_add
430
(self.checker.pid,
431
self.checker_callback,
432
data=command))
433
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:
434
234
logger.error(u"Failed to start subprocess: %s",
435
235
error)
436
236
# Re-run this periodically if run by gobject.timeout_add
437
237
return True
438
439
238
def stop_checker(self):
440
239
"""Force the checker process, if any, to stop."""
441
if self.checker_callback_tag:
442
gobject.source_remove(self.checker_callback_tag)
443
self.checker_callback_tag = None
444
if getattr(self, "checker", None) is None:
240
if not hasattr(self, "checker") or self.checker is None:
445
241
return
446
logger.debug(u"Stopping checker for %(name)s", vars(self))
447
try:
448
os.kill(self.checker.pid, signal.SIGTERM)
449
#os.sleep(0.5)
450
#if self.checker.poll() is None:
451
# os.kill(self.checker.pid, signal.SIGKILL)
452
except OSError, error:
453
if error.errno != errno.ESRCH: # No such process
454
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)
455
247
self.checker = None
456
self.PropertyChanged(dbus.String(u"checker_running"),
457
dbus.Boolean(False, variant_level=1))
458
459
def still_valid(self):
248
def still_valid(self, now=None):
460
249
"""Has the timeout not yet passed for this client?"""
461
if not getattr(self, "started", False):
462
return False
463
now = datetime.datetime.utcnow()
464
if self.last_checked_ok is None:
250
if now is None:
251
now = datetime.datetime.now()
252
if self.last_seen is None:
465
253
return now < (self.created + self.timeout)
466
254
else:
467
return now < (self.last_checked_ok + self.timeout)
468
469
## D-Bus methods & signals
470
_interface = u"org.mandos_system.Mandos.Client"
471
472
# BumpTimeout - method
473
BumpTimeout = dbus.service.method(_interface)(bump_timeout)
474
BumpTimeout.__name__ = "BumpTimeout"
475
476
# CheckerCompleted - signal
477
@dbus.service.signal(_interface, signature="bqs")
478
def CheckerCompleted(self, success, condition, command):
479
"D-Bus signal"
480
pass
481
482
# CheckerStarted - signal
483
@dbus.service.signal(_interface, signature="s")
484
def CheckerStarted(self, command):
485
"D-Bus signal"
486
pass
487
488
# GetAllProperties - method
489
@dbus.service.method(_interface, out_signature="a{sv}")
490
def GetAllProperties(self):
491
"D-Bus method"
492
return dbus.Dictionary({
493
dbus.String("name"):
494
dbus.String(self.name, variant_level=1),
495
dbus.String("fingerprint"):
496
dbus.String(self.fingerprint, variant_level=1),
497
dbus.String("host"):
498
dbus.String(self.host, variant_level=1),
499
dbus.String("created"):
500
_datetime_to_dbus_struct(self.created,
501
variant_level=1),
502
dbus.String("last_started"):
503
(_datetime_to_dbus_struct(self.last_started,
504
variant_level=1)
505
if self.last_started is not None
506
else dbus.Boolean(False, variant_level=1)),
507
dbus.String("started"):
508
dbus.Boolean(self.started, variant_level=1),
509
dbus.String("last_checked_ok"):
510
(_datetime_to_dbus_struct(self.last_checked_ok,
511
variant_level=1)
512
if self.last_checked_ok is not None
513
else dbus.Boolean (False, variant_level=1)),
514
dbus.String("timeout"):
515
dbus.UInt64(self._timeout_milliseconds,
516
variant_level=1),
517
dbus.String("interval"):
518
dbus.UInt64(self._interval_milliseconds,
519
variant_level=1),
520
dbus.String("checker"):
521
dbus.String(self.checker_command,
522
variant_level=1),
523
dbus.String("checker_running"):
524
dbus.Boolean(self.checker is not None,
525
variant_level=1),
526
}, signature="sv")
527
528
# IsStillValid - method
529
IsStillValid = (dbus.service.method(_interface, out_signature="b")
530
(still_valid))
531
IsStillValid.__name__ = "IsStillValid"
532
533
# PropertyChanged - signal
534
@dbus.service.signal(_interface, signature="sv")
535
def PropertyChanged(self, property, value):
536
"D-Bus signal"
537
pass
538
539
# SetChecker - method
540
@dbus.service.method(_interface, in_signature="s")
541
def SetChecker(self, checker):
542
"D-Bus setter method"
543
self.checker_command = checker
544
545
# SetHost - method
546
@dbus.service.method(_interface, in_signature="s")
547
def SetHost(self, host):
548
"D-Bus setter method"
549
self.host = host
550
551
# SetInterval - method
552
@dbus.service.method(_interface, in_signature="t")
553
def SetInterval(self, milliseconds):
554
self.interval = datetime.timdeelta(0, 0, 0, milliseconds)
555
556
# SetSecret - method
557
@dbus.service.method(_interface, in_signature="ay",
558
byte_arrays=True)
559
def SetSecret(self, secret):
560
"D-Bus setter method"
561
self.secret = str(secret)
562
563
# SetTimeout - method
564
@dbus.service.method(_interface, in_signature="t")
565
def SetTimeout(self, milliseconds):
566
self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
567
568
# Start - method
569
Start = dbus.service.method(_interface)(start)
570
Start.__name__ = "Start"
571
572
# StartChecker - method
573
@dbus.service.method(_interface)
574
def StartChecker(self):
575
"D-Bus method"
576
self.start_checker()
577
578
# Stop - method
579
@dbus.service.method(_interface)
580
def Stop(self):
581
"D-Bus method"
582
self.stop()
583
584
# StopChecker - method
585
StopChecker = dbus.service.method(_interface)(stop_checker)
586
StopChecker.__name__ = "StopChecker"
587
588
del _interface
255
return now < (self.last_seen + self.timeout)
589
256
590
257
591
258
def peer_certificate(session):
592
"Return the peer's OpenPGP certificate as a bytestring"
593
259
# If not an OpenPGP certificate...
594
if (gnutls.library.functions
595
.gnutls_certificate_type_get(session._c_object)
596
!= 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:
597
263
# ...do the normal thing
598
264
return session.peer_certificate
599
265
list_size = ctypes.c_uint()
600
cert_list = (gnutls.library.functions
601
.gnutls_certificate_get_peers
602
(session._c_object, ctypes.byref(list_size)))
266
cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
267
(session._c_object, ctypes.byref(list_size))
603
268
if list_size.value == 0:
604
269
return None
605
270
cert = cert_list[0]
607
272
608
273
609
274
def fingerprint(openpgp):
610
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
611
# New GnuTLS "datum" with the OpenPGP public key
612
datum = (gnutls.library.types
613
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
614
ctypes.POINTER
615
(ctypes.c_ubyte)),
616
ctypes.c_uint(len(openpgp))))
617
275
# New empty GnuTLS certificate
618
276
crt = gnutls.library.types.gnutls_openpgp_crt_t()
619
(gnutls.library.functions
620
.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)))
621
284
# Import the OpenPGP public key into the certificate
622
(gnutls.library.functions
623
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
624
gnutls.library.constants
625
.GNUTLS_OPENPGP_FMT_RAW))
626
# Verify the self signature in the key
627
crtverify = ctypes.c_uint()
628
(gnutls.library.functions
629
.gnutls_openpgp_crt_verify_self(crt, 0, ctypes.byref(crtverify)))
630
if crtverify.value != 0:
631
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
632
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)
633
289
# New buffer for the fingerprint
634
buf = ctypes.create_string_buffer(20)
635
buf_len = ctypes.c_size_t()
290
buffer = ctypes.create_string_buffer(20)
291
buffer_length = ctypes.c_size_t()
636
292
# Get the fingerprint from the certificate into the buffer
637
(gnutls.library.functions
638
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
639
ctypes.byref(buf_len)))
293
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
294
(crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
640
295
# Deinit the certificate
641
296
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
642
297
# Convert the buffer to a Python bytestring
643
fpr = ctypes.string_at(buf, buf_len.value)
298
fpr = ctypes.string_at(buffer, buffer_length.value)
644
299
# Convert the bytestring to hexadecimal notation
645
300
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
646
301
return hex_fpr
647
302
648
303
649
class TCP_handler(SocketServer.BaseRequestHandler, object):
304
class tcp_handler(SocketServer.BaseRequestHandler, object):
650
305
"""A TCP request handler class.
651
306
Instantiated by IPv6_TCPServer for each request to handle it.
652
307
Note: This will run in its own forked process."""
653
308
654
309
def handle(self):
655
logger.info(u"TCP connection from: %s",
656
unicode(self.client_address))
657
session = (gnutls.connection
658
.ClientSession(self.request,
659
gnutls.connection
660
.X509Credentials()))
661
662
line = self.request.makefile().readline()
663
logger.debug(u"Protocol version: %r", line)
664
try:
665
if int(line.strip().split()[0]) > 1:
666
raise RuntimeError
667
except (ValueError, IndexError, RuntimeError), error:
668
logger.error(u"Unknown protocol version: %s", error)
669
return
670
671
# Note: gnutls.connection.X509Credentials is really a generic
672
# GnuTLS certificate credentials object so long as no X.509
673
# keys are added to it. Therefore, we can use it here despite
674
# 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())
675
315
676
316
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
677
317
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
678
318
# "+DHE-DSS"))
679
# Use a fallback default, since this MUST be set.
680
priority = self.server.settings.get("priority", "NORMAL")
681
(gnutls.library.functions
682
.gnutls_priority_set_direct(session._c_object,
683
priority, None))
319
priority = "SECURE256"
320
321
gnutls.library.functions.gnutls_priority_set_direct\
322
(session._c_object, priority, None);
684
323
685
324
try:
686
325
session.handshake()
687
326
except gnutls.errors.GNUTLSError, error:
688
logger.warning(u"Handshake failed: %s", error)
327
logger.debug(u"Handshake failed: %s", error)
689
328
# Do not run session.bye() here: the session is not
690
329
# established. Just abandon the request.
691
330
return
692
331
try:
693
332
fpr = fingerprint(peer_certificate(session))
694
333
except (TypeError, gnutls.errors.GNUTLSError), error:
695
logger.warning(u"Bad certificate: %s", error)
334
logger.debug(u"Bad certificate: %s", error)
696
335
session.bye()
697
336
return
698
337
logger.debug(u"Fingerprint: %s", fpr)
699
for c in self.server.clients:
338
client = None
339
for c in clients:
700
340
if c.fingerprint == fpr:
701
341
client = c
702
342
break
703
else:
704
logger.warning(u"Client not found for fingerprint: %s",
705
fpr)
706
session.bye()
707
return
708
343
# Have to check if client.still_valid(), since it is possible
709
344
# that the client timed out while establishing the GnuTLS
710
345
# session.
711
if not client.still_valid():
712
logger.warning(u"Client %(name)s is invalid",
713
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)
714
353
session.bye()
715
354
return
716
## This won't work here, since we're in a fork.
717
# client.bump_timeout()
718
355
sent_size = 0
719
356
while sent_size < len(client.secret):
720
357
sent = session.send(client.secret[sent_size:])
725
362
session.bye()
726
363
727
364
728
class IPv6_TCPServer(SocketServer.ForkingMixIn,
729
SocketServer.TCPServer, object):
365
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
730
366
"""IPv6 TCP server. Accepts 'None' as address and/or port.
731
367
Attributes:
732
settings: Server settings
368
options: Command line options
733
369
clients: Set() of Client objects
734
enabled: Boolean; whether this server is activated yet
735
370
"""
736
371
address_family = socket.AF_INET6
737
372
def __init__(self, *args, **kwargs):
738
if "settings" in kwargs:
739
self.settings = kwargs["settings"]
740
del kwargs["settings"]
373
if "options" in kwargs:
374
self.options = kwargs["options"]
375
del kwargs["options"]
741
376
if "clients" in kwargs:
742
377
self.clients = kwargs["clients"]
743
378
del kwargs["clients"]
744
self.enabled = False
745
super(IPv6_TCPServer, self).__init__(*args, **kwargs)
379
return super(type(self), self).__init__(*args, **kwargs)
746
380
def server_bind(self):
747
381
"""This overrides the normal server_bind() function
748
382
to bind to an interface if one was specified, and also NOT to
749
383
bind to an address or port if they were not specified."""
750
if self.settings["interface"]:
751
# 25 is from /usr/include/asm-i486/socket.h
752
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
753
388
try:
754
389
self.socket.setsockopt(socket.SOL_SOCKET,
755
SO_BINDTODEVICE,
756
self.settings["interface"])
390
socket.SO_BINDTODEVICE,
391
self.options.interface)
757
392
except socket.error, error:
758
393
if error[0] == errno.EPERM:
759
logger.error(u"No permission to"
760
u" bind to interface %s",
761
self.settings["interface"])
394
logger.warning(u"No permission to"
395
u" bind to interface %s",
396
self.options.interface)
762
397
else:
763
398
raise error
764
399
# Only bind(2) the socket if we really need to.
767
402
in6addr_any = "::"
768
403
self.server_address = (in6addr_any,
769
404
self.server_address[1])
770
elif not self.server_address[1]:
405
elif self.server_address[1] is None:
771
406
self.server_address = (self.server_address[0],
772
407
0)
773
# if self.settings["interface"]:
774
# self.server_address = (self.server_address[0],
775
# 0, # port
776
# 0, # flowinfo
777
# if_nametoindex
778
# (self.settings
779
# ["interface"]))
780
return super(IPv6_TCPServer, self).server_bind()
781
def server_activate(self):
782
if self.enabled:
783
return super(IPv6_TCPServer, self).server_activate()
784
def enable(self):
785
self.enabled = True
408
return super(type(self), self).server_bind()
786
409
787
410
788
411
def string_to_delta(interval):
798
421
datetime.timedelta(1)
799
422
>>> string_to_delta(u'1w')
800
423
datetime.timedelta(7)
801
>>> string_to_delta('5m 30s')
802
datetime.timedelta(0, 330)
803
424
"""
804
timevalue = datetime.timedelta(0)
805
for s in interval.split():
806
try:
807
suffix = unicode(s[-1])
808
value = int(s[:-1])
809
if suffix == u"d":
810
delta = datetime.timedelta(value)
811
elif suffix == u"s":
812
delta = datetime.timedelta(0, value)
813
elif suffix == u"m":
814
delta = datetime.timedelta(0, 0, 0, 0, value)
815
elif suffix == u"h":
816
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
817
elif suffix == u"w":
818
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
819
else:
820
raise ValueError
821
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:
822
439
raise ValueError
823
timevalue += delta
824
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()
825
476
826
477
827
478
def server_state_changed(state):
828
"""Derived from the Avahi example code"""
479
"""From the Avahi server example code"""
829
480
if state == avahi.SERVER_COLLISION:
830
logger.error(u"Zeroconf server name collision")
831
service.remove()
481
logger.warning(u"Server name collision")
482
remove_service()
832
483
elif state == avahi.SERVER_RUNNING:
833
service.add()
484
add_service()
834
485
835
486
836
487
def entry_group_state_changed(state, error):
837
"""Derived from the Avahi example code"""
838
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)
839
492
840
493
if state == avahi.ENTRY_GROUP_ESTABLISHED:
841
logger.debug(u"Zeroconf service established.")
494
logger.debug(u"Service established.")
842
495
elif state == avahi.ENTRY_GROUP_COLLISION:
843
logger.warning(u"Zeroconf service name collision.")
844
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()
845
510
elif state == avahi.ENTRY_GROUP_FAILURE:
846
logger.critical(u"Avahi: Error in group state changed %s",
847
unicode(error))
848
raise AvahiGroupError("State changed: %s", str(error))
511
logger.error(u"Error in group state changed %s",
512
unicode(error))
513
main_loop.quit()
514
return
515
849
516
850
517
def if_nametoindex(interface):
851
"""Call the C function if_nametoindex(), or equivalent"""
852
global if_nametoindex
518
"""Call the C function if_nametoindex()"""
853
519
try:
854
if_nametoindex = (ctypes.cdll.LoadLibrary
855
(ctypes.util.find_library("c"))
856
.if_nametoindex)
520
libc = ctypes.cdll.LoadLibrary("libc.so.6")
521
return libc.if_nametoindex(interface)
857
522
except (OSError, AttributeError):
858
523
if "struct" not in sys.modules:
859
524
import struct
860
525
if "fcntl" not in sys.modules:
861
526
import fcntl
862
def if_nametoindex(interface):
863
"Get an interface index the hard way, i.e. using fcntl()"
864
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
865
with closing(socket.socket()) as s:
866
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
867
struct.pack("16s16x", interface))
868
interface_index = struct.unpack("I", ifreq[16:20])[0]
869
return interface_index
870
return if_nametoindex(interface)
871
872
873
def daemon(nochdir = False, noclose = False):
874
"""See daemon(3). Standard BSD Unix function.
875
This should really exist as os.daemon, but it doesn't (yet)."""
876
if os.fork():
877
sys.exit()
878
os.setsid()
879
if not nochdir:
880
os.chdir("/")
881
if os.fork():
882
sys.exit()
883
if not noclose:
884
# Close all standard open file descriptors
885
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
886
if not stat.S_ISCHR(os.fstat(null).st_mode):
887
raise OSError(errno.ENODEV,
888
"/dev/null not a character device")
889
os.dup2(null, sys.stdin.fileno())
890
os.dup2(null, sys.stdout.fileno())
891
os.dup2(null, sys.stderr.fileno())
892
if null > 2:
893
os.close(null)
894
895
896
def main():
897
parser = 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()
898
538
parser.add_option("-i", "--interface", type="string",
899
metavar="IF", help="Bind to interface IF")
900
parser.add_option("-a", "--address", type="string",
901
help="Address to listen for requests on")
902
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,
903
554
help="Port number to receive requests on")
555
parser.add_option("--timeout", type="string", # Parsed later
556
default="1h",
557
help="Amount of downtime allowed for clients")
558
parser.add_option("--interval", type="string", # Parsed later
559
default="5m",
560
help="How often to check that a client is up")
904
561
parser.add_option("--check", action="store_true", default=False,
905
562
help="Run self-test")
906
parser.add_option("--debug", action="store_true",
907
help="Debug mode; run in foreground and log to"
908
" terminal")
909
parser.add_option("--priority", type="string", help="GnuTLS"
910
" priority string (see GnuTLS documentation)")
911
parser.add_option("--servicename", type="string", metavar="NAME",
912
help="Zeroconf service name")
913
parser.add_option("--configdir", type="string",
914
default="/etc/mandos", metavar="DIR",
915
help="Directory to search for configuration"
916
" files")
917
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()
918
566
919
567
if options.check:
920
568
import doctest
921
569
doctest.testmod()
922
570
sys.exit()
923
571
924
# Default values for config file for server-global settings
925
server_defaults = { "interface": "",
926
"address": "",
927
"port": "",
928
"debug": "False",
929
"priority":
930
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
931
"servicename": "Mandos",
932
}
933
934
# Parse config file for server-global settings
935
server_config = ConfigParser.SafeConfigParser(server_defaults)
936
del server_defaults
937
server_config.read(os.path.join(options.configdir, "mandos.conf"))
938
# Convert the SafeConfigParser object to a dict
939
server_settings = server_config.defaults()
940
# Use getboolean on the boolean config option
941
server_settings["debug"] = (server_config.getboolean
942
("DEFAULT", "debug"))
943
del server_config
944
945
# Override the settings from the config file with command line
946
# options, if set.
947
for option in ("interface", "address", "port", "debug",
948
"priority", "servicename", "configdir"):
949
value = getattr(options, option)
950
if value is not None:
951
server_settings[option] = value
952
del options
953
# Now we have our good server settings in "server_settings"
954
955
debug = server_settings["debug"]
956
957
if not debug:
958
syslogger.setLevel(logging.WARNING)
959
console.setLevel(logging.WARNING)
960
961
if server_settings["servicename"] != "Mandos":
962
syslogger.setFormatter(logging.Formatter
963
('Mandos (%s): %%(levelname)s:'
964
' %%(message)s'
965
% server_settings["servicename"]))
966
967
# Parse config file with clients
968
client_defaults = { "timeout": "1h",
969
"interval": "5m",
970
"checker": "fping -q -- %(host)s",
971
"host": "",
972
}
973
client_config = ConfigParser.SafeConfigParser(client_defaults)
974
client_config.read(os.path.join(server_settings["configdir"],
975
"clients.conf"))
976
977
clients = Set()
978
tcp_server = IPv6_TCPServer((server_settings["address"],
979
server_settings["port"]),
980
TCP_handler,
981
settings=server_settings,
982
clients=clients)
983
pidfilename = "/var/run/mandos.pid"
984
try:
985
pidfile = open(pidfilename, "w")
986
except IOError, error:
987
logger.error("Could not open file %r", pidfilename)
988
989
try:
990
uid = pwd.getpwnam("_mandos").pw_uid
991
except KeyError:
992
try:
993
uid = pwd.getpwnam("mandos").pw_uid
994
except KeyError:
995
try:
996
uid = pwd.getpwnam("nobody").pw_uid
997
except KeyError:
998
uid = 65534
999
try:
1000
gid = pwd.getpwnam("_mandos").pw_gid
1001
except KeyError:
1002
try:
1003
gid = pwd.getpwnam("mandos").pw_gid
1004
except KeyError:
1005
try:
1006
gid = pwd.getpwnam("nogroup").pw_gid
1007
except KeyError:
1008
gid = 65534
1009
try:
1010
os.setuid(uid)
1011
os.setgid(gid)
1012
except OSError, error:
1013
if error[0] != errno.EPERM:
1014
raise error
1015
1016
global service
1017
service = AvahiService(name = server_settings["servicename"],
1018
servicetype = "_mandos._tcp", )
1019
if server_settings["interface"]:
1020
service.interface = (if_nametoindex
1021
(server_settings["interface"]))
1022
1023
global main_loop
1024
global bus
1025
global server
1026
# 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
1027
589
DBusGMainLoop(set_as_default=True )
1028
590
main_loop = gobject.MainLoop()
1029
591
bus = dbus.SystemBus()
1030
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
1031
avahi.DBUS_PATH_SERVER),
1032
avahi.DBUS_INTERFACE_SERVER)
592
server = dbus.Interface(
593
bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
594
avahi.DBUS_INTERFACE_SERVER )
1033
595
# End of Avahi example code
1034
bus_name = dbus.service.BusName(u"org.mandos-system.Mandos", bus)
1035
1036
clients.update(Set(Client(name = section,
1037
config
1038
= dict(client_config.items(section)))
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))))
1039
610
for section in client_config.sections()))
1040
if not clients:
1041
logger.critical(u"No clients defined")
1042
sys.exit(1)
1043
1044
if debug:
1045
# Redirect stdin so all checkers get /dev/null
1046
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1047
os.dup2(null, sys.stdin.fileno())
1048
if null > 2:
1049
os.close(null)
1050
else:
1051
# No console logging
1052
logger.removeHandler(console)
1053
# Close all input and output, do double fork, etc.
1054
daemon()
1055
1056
try:
1057
pid = os.getpid()
1058
pidfile.write(str(pid) + "\n")
1059
pidfile.close()
1060
del pidfile
1061
except IOError:
1062
logger.error(u"Could not write to file %r with PID %d",
1063
pidfilename, pid)
1064
except NameError:
1065
# "pidfile" was never created
1066
pass
1067
del pidfilename
1068
1069
def cleanup():
1070
"Cleanup function; run on exit"
1071
global group
1072
# From the Avahi example code
1073
if not group is None:
1074
group.Free()
1075
group = None
1076
# End of Avahi example code
1077
1078
while clients:
1079
client = clients.pop()
1080
client.stop_hook = None
1081
client.stop()
1082
1083
atexit.register(cleanup)
1084
1085
if not debug:
1086
signal.signal(signal.SIGINT, signal.SIG_IGN)
1087
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1088
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1089
1090
class MandosServer(dbus.service.Object):
1091
"""A D-Bus proxy object"""
1092
def __init__(self):
1093
dbus.service.Object.__init__(self, bus,
1094
"/Mandos")
1095
_interface = u"org.mandos_system.Mandos"
1096
1097
@dbus.service.signal(_interface, signature="oa{sv}")
1098
def ClientAdded(self, objpath, properties):
1099
"D-Bus signal"
1100
pass
1101
1102
@dbus.service.signal(_interface, signature="o")
1103
def ClientRemoved(self, objpath):
1104
"D-Bus signal"
1105
pass
1106
1107
@dbus.service.method(_interface, out_signature="ao")
1108
def GetAllClients(self):
1109
return dbus.Array(c.dbus_object_path for c in clients)
1110
1111
@dbus.service.method(_interface, out_signature="a{oa{sv}}")
1112
def GetAllClientsWithProperties(self):
1113
return dbus.Dictionary(
1114
((c.dbus_object_path, c.GetAllProperties())
1115
for c in clients),
1116
signature="oa{sv}")
1117
1118
@dbus.service.method(_interface, in_signature="o")
1119
def RemoveClient(self, object_path):
1120
for c in clients:
1121
if c.dbus_object_path == object_path:
1122
c.stop()
1123
clients.remove(c)
1124
return
1125
raise KeyError
1126
1127
del _interface
1128
1129
mandos_server = MandosServer()
1130
1131
611
for client in clients:
1132
# Emit D-Bus signal
1133
mandos_server.ClientAdded(client.dbus_object_path,
1134
client.GetAllProperties())
1135
612
client.start()
1136
613
1137
tcp_server.enable()
1138
tcp_server.server_activate()
1139
1140
# Find out what port we got
1141
service.port = tcp_server.socket.getsockname()[1]
1142
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
1143
u" scope_id %d" % tcp_server.socket.getsockname())
1144
1145
#service.interface = tcp_server.socket.getsockname()[3]
1146
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)
1147
634
try:
1148
# From the Avahi example code
1149
server.connect_to_signal("StateChanged", server_state_changed)
1150
try:
1151
server_state_changed(server.GetState())
1152
except dbus.exceptions.DBusException, error:
1153
logger.critical(u"DBusException: %s", error)
1154
sys.exit(1)
1155
# End of Avahi example code
1156
1157
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
1158
lambda *args, **kwargs:
1159
(tcp_server.handle_request
1160
(*args[2:], **kwargs) or True))
1161
1162
logger.debug(u"Starting main loop")
1163
635
main_loop.run()
1164
except AvahiError, error:
1165
logger.critical(u"AvahiError: %s" + unicode(error))
1166
sys.exit(1)
1167
636
except KeyboardInterrupt:
1168
if debug:
1169
print
637
print
638
639
# Cleanup here
1170
640
1171
if __name__ == '__main__':
1172
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