To get this branch, use:
bzr branch
http://bzr.recompile.se/loggerhead/mandos/release
« back to all changes in this revision
Viewing changes to server.py
- browse files at revision 24
- compare with another revision
- download diff
- download tarball
- view history from revision 24
- Committer: Teddy Hogeborn
- Date: 2008-07-22 01:59:47 UTC
- Revision ID: teddy@fukt.bsnet.se-20080722015947-y7o6keji020nvrhw
* Makefile (OPTIMIZE): New; optimize for size.
(CFLAGS): Use $(OPTIMIZE).
(CFLAGS): Use $(OPTIMIZE).
- 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
6
6
# This program is partly derived from an example program for an Avahi
7
7
# service publisher, downloaded from
8
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".
9
# following functions: "add_service", "remove_service",
10
# "server_state_changed", "entry_group_state_changed", and some lines
11
# in "main".
12
12
#
13
# Everything else is
14
# Copyright © 2008,2009 Teddy Hogeborn
15
# Copyright © 2008,2009 Björn Påhlsson
13
# Everything else is Copyright © 2007-2008 Teddy Hogeborn and Björn
14
# Påhlsson.
16
15
#
17
16
# This program is free software: you can redistribute it and/or modify
18
17
# it under the terms of the GNU General Public License as published by
25
24
# GNU General Public License for more details.
26
25
#
27
26
# 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/>.
27
# along with this program. If not, see <http://www.gnu.org/licenses/>.
30
28
#
31
# Contact the authors at <mandos@fukt.bsnet.se>.
29
# Contact the authors at <https://www.fukt.bsnet.se/~belorn/> and
30
# <https://www.fukt.bsnet.se/~teddy/>.
32
31
#
33
32
34
from __future__ import division, with_statement, absolute_import
33
from __future__ import division
35
34
36
35
import SocketServer
37
36
import socket
38
import optparse
37
import select
38
from optparse import OptionParser
39
39
import datetime
40
40
import errno
41
41
import gnutls.crypto
55
55
import stat
56
56
import logging
57
57
import logging.handlers
58
import pwd
59
from contextlib import closing
60
58
61
59
import dbus
62
import dbus.service
63
60
import gobject
64
61
import avahi
65
62
from dbus.mainloop.glib import DBusGMainLoop
66
63
import ctypes
67
import ctypes.util
68
69
version = "1.0.5"
64
65
# Brief description of the operation of this program:
66
#
67
# This server announces itself as a Zeroconf service. Connecting
68
# clients use the TLS protocol, with the unusual quirk that this
69
# server program acts as a TLS "client" while the connecting clients
70
# acts as a TLS "server". The clients (acting as a TLS "server") must
71
# supply an OpenPGP certificate, and the fingerprint of this
72
# certificate is used by this server to look up (in a list read from a
73
# file at start time) which binary blob to give the client. No other
74
# authentication or authorization is done by this server.
75
70
76
71
77
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
syslogger = logging.handlers.SysLogHandler\
79
(facility = logging.handlers.SysLogHandler.LOG_DAEMON)
80
syslogger.setFormatter(logging.Formatter\
81
('%(levelname)s: %(message)s'))
78
82
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
83
del syslogger
84
85
# This variable is used to optionally bind to a specified interface.
86
# It is a global variable to fit in with the other variables from the
87
# Avahi example code.
88
serviceInterface = avahi.IF_UNSPEC
169
89
# From the Avahi example code:
170
group = None # our entry group
90
serviceName = "Mandos"
91
serviceType = "_mandos._tcp" # http://www.dns-sd.org/ServiceTypes.html
92
servicePort = None # Not known at startup
93
serviceTXT = [] # TXT record for the service
94
domain = "" # Domain to publish on, default to .local
95
host = "" # Host to publish records for, default to localhost
96
group = None #our entry group
97
rename_count = 12 # Counter so we only rename after collisions a
98
# sensible number of times
171
99
# End of Avahi example code
172
100
173
101
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):
102
class Client(object):
180
103
"""A representation of a client host served by this server.
181
104
Attributes:
182
name: string; from the config file, used in log messages and
183
D-Bus identifiers
105
name: string; from the config file, used in log messages
184
106
fingerprint: string (40 or 32 hexadecimal digits); used to
185
107
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.
108
secret: bytestring; sent verbatim (over TLS) to client
109
fqdn: string (FQDN); available for use by the checker command
110
created: datetime.datetime()
111
last_seen: datetime.datetime() or None if not yet seen
112
timeout: datetime.timedelta(); How long from last_seen until
113
this client is invalid
114
interval: datetime.timedelta(); How often to start a new checker
115
stop_hook: If set, called by stop() as stop_hook(self)
116
checker: subprocess.Popen(); a running checker process used
117
to see if the client lives.
118
Is None if no process is running.
199
119
checker_initiator_tag: a gobject event source tag, or None
200
disable_initiator_tag: - '' -
120
stop_initiator_tag: - '' -
201
121
checker_callback_tag: - '' -
202
122
checker_command: string; External command which is run to check if
203
client lives. %() expansions are done at
123
client lives. %()s expansions are done at
204
124
runtime with vars(self) as dict, so that for
205
125
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
126
Private attibutes:
127
_timeout: Real variable for 'timeout'
128
_interval: Real variable for 'interval'
129
_timeout_milliseconds: Used by gobject.timeout_add()
130
_interval_milliseconds: - '' -
208
131
"""
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."""
132
def _set_timeout(self, timeout):
133
"Setter function for 'timeout' attribute"
134
self._timeout = timeout
135
self._timeout_milliseconds = ((self.timeout.days
136
* 24 * 60 * 60 * 1000)
137
+ (self.timeout.seconds * 1000)
138
+ (self.timeout.microseconds
139
// 1000))
140
timeout = property(lambda self: self._timeout,
141
_set_timeout)
142
del _set_timeout
143
def _set_interval(self, interval):
144
"Setter function for 'interval' attribute"
145
self._interval = interval
146
self._interval_milliseconds = ((self.interval.days
147
* 24 * 60 * 60 * 1000)
148
+ (self.interval.seconds
149
* 1000)
150
+ (self.interval.microseconds
151
// 1000))
152
interval = property(lambda self: self._interval,
153
_set_interval)
154
del _set_interval
155
def __init__(self, name=None, options=None, stop_hook=None,
156
fingerprint=None, secret=None, secfile=None,
157
fqdn=None, timeout=None, interval=-1, checker=None):
158
"""Note: the 'checker' argument sets the 'checker_command'
159
attribute and not the 'checker' attribute.."""
226
160
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
161
# Uppercase and remove spaces from fingerprint
162
# for later comparison purposes with return value of
163
# the fingerprint() function
164
self.fingerprint = fingerprint.upper().replace(u" ", u"")
165
if secret:
166
self.secret = secret.decode(u"base64")
167
elif secfile:
168
sf = open(secfile)
169
self.secret = sf.read()
170
sf.close()
171
else:
172
raise RuntimeError(u"No secret or secfile for client %s"
173
% self.name)
174
self.fqdn = fqdn # string
175
self.created = datetime.datetime.now()
176
self.last_seen = None
177
if timeout is None:
178
self.timeout = options.timeout
179
else:
180
self.timeout = string_to_delta(timeout)
181
if interval == -1:
182
self.interval = options.interval
183
else:
184
self.interval = string_to_delta(interval)
185
self.stop_hook = stop_hook
255
186
self.checker = None
256
187
self.checker_initiator_tag = None
257
self.disable_initiator_tag = None
188
self.stop_initiator_tag = None
258
189
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):
190
self.check_command = checker
191
def start(self):
272
192
"""Start this client's checker and timeout hooks"""
273
self.last_enabled = datetime.datetime.utcnow()
274
193
# Schedule a new checker to be started an 'interval' from now,
275
194
# and every interval from then on.
276
self.checker_initiator_tag = (gobject.timeout_add
277
(self.interval_milliseconds(),
278
self.start_checker))
195
self.checker_initiator_tag = gobject.timeout_add\
196
(self._interval_milliseconds,
197
self.start_checker)
279
198
# Also start a new checker *right now*.
280
199
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):
200
# Schedule a stop() when 'timeout' has passed
201
self.stop_initiator_tag = gobject.timeout_add\
202
(self._timeout_milliseconds,
203
self.stop)
204
def stop(self):
205
"""Stop this client.
206
The possibility that this client might be restarted is left
207
open, but not currently used."""
208
# If this client doesn't have a secret, it is already stopped.
209
if self.secret:
210
logger.debug(u"Stopping client %s", self.name)
211
self.secret = None
212
else:
297
213
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):
214
if hasattr(self, "stop_initiator_tag") \
215
and self.stop_initiator_tag:
216
gobject.source_remove(self.stop_initiator_tag)
217
self.stop_initiator_tag = None
218
if hasattr(self, "checker_initiator_tag") \
219
and self.checker_initiator_tag:
303
220
gobject.source_remove(self.checker_initiator_tag)
304
221
self.checker_initiator_tag = None
305
222
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))
223
if self.stop_hook:
224
self.stop_hook(self)
313
225
# Do not run this again if called by a gobject.timeout_add
314
226
return False
315
316
227
def __del__(self):
317
self.disable_hook = None
318
self.disable()
319
320
def checker_callback(self, pid, condition, command):
228
self.stop_hook = None
229
self.stop()
230
def checker_callback(self, pid, condition):
321
231
"""The checker has completed, so take appropriate actions."""
232
now = datetime.datetime.now()
322
233
self.checker_callback_tag = None
323
234
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:
235
if os.WIFEXITED(condition) \
236
and (os.WEXITSTATUS(condition) == 0):
237
logger.debug(u"Checker for %(name)s succeeded",
238
vars(self))
239
self.last_seen = now
240
gobject.source_remove(self.stop_initiator_tag)
241
self.stop_initiator_tag = gobject.timeout_add\
242
(self._timeout_milliseconds,
243
self.stop)
244
elif not os.WIFEXITED(condition):
343
245
logger.warning(u"Checker for %(name)s crashed?",
344
246
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
247
else:
248
logger.debug(u"Checker for %(name)s failed",
249
vars(self))
368
250
def start_checker(self):
369
251
"""Start a new checker subprocess if one is not running.
370
252
If a checker already exists, leave it running and do
379
261
# is as it should be.
380
262
if self.checker is None:
381
263
try:
382
# In case checker_command has exactly one % operator
383
command = self.checker_command % self.host
264
command = self.check_command % self.fqdn
384
265
except TypeError:
385
# Escape attributes for the shell
386
266
escaped_attrs = dict((key, re.escape(str(val)))
387
267
for key, val in
388
268
vars(self).iteritems())
389
269
try:
390
command = self.checker_command % escaped_attrs
270
command = self.check_command % escaped_attrs
391
271
except TypeError, error:
392
logger.error(u'Could not format string "%s":'
393
u' %s', self.checker_command, error)
272
logger.critical(u'Could not format string "%s":'
273
u' %s', self.check_command, error)
394
274
return True # Try again later
395
275
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
except OSError, error:
276
logger.debug(u"Starting checker %r for %s",
277
command, self.name)
278
self.checker = subprocess.\
279
Popen(command,
280
close_fds=True, shell=True,
281
cwd="/")
282
self.checker_callback_tag = gobject.child_watch_add\
283
(self.checker.pid,
284
self.checker_callback)
285
except subprocess.OSError, error:
416
286
logger.error(u"Failed to start subprocess: %s",
417
287
error)
418
288
# Re-run this periodically if run by gobject.timeout_add
419
289
return True
420
421
290
def stop_checker(self):
422
291
"""Force the checker process, if any, to stop."""
423
292
if self.checker_callback_tag:
424
293
gobject.source_remove(self.checker_callback_tag)
425
294
self.checker_callback_tag = None
426
if getattr(self, "checker", None) is None:
295
if not hasattr(self, "checker") or self.checker is None:
427
296
return
428
logger.debug(u"Stopping checker for %(name)s", vars(self))
297
logger.debug("Stopping checker for %(name)s", vars(self))
429
298
try:
430
299
os.kill(self.checker.pid, signal.SIGTERM)
431
300
#os.sleep(0.5)
432
301
#if self.checker.poll() is None:
433
302
# os.kill(self.checker.pid, signal.SIGKILL)
434
303
except OSError, error:
435
if error.errno != errno.ESRCH: # No such process
304
if error.errno != errno.ESRCH:
436
305
raise
437
306
self.checker = None
438
if self.use_dbus:
439
self.PropertyChanged(dbus.String(u"checker_running"),
440
dbus.Boolean(False, variant_level=1))
441
442
def still_valid(self):
307
def still_valid(self, now=None):
443
308
"""Has the timeout not yet passed for this client?"""
444
if not getattr(self, "enabled", False):
445
return False
446
now = datetime.datetime.utcnow()
447
if self.last_checked_ok is None:
309
if now is None:
310
now = datetime.datetime.now()
311
if self.last_seen is None:
448
312
return now < (self.created + self.timeout)
449
313
else:
450
return now < (self.last_checked_ok + self.timeout)
451
452
## D-Bus methods & signals
453
_interface = u"se.bsnet.fukt.Mandos.Client"
454
455
# CheckedOK - method
456
CheckedOK = dbus.service.method(_interface)(checked_ok)
457
CheckedOK.__name__ = "CheckedOK"
458
459
# CheckerCompleted - signal
460
@dbus.service.signal(_interface, signature="nxs")
461
def CheckerCompleted(self, exitcode, waitstatus, command):
462
"D-Bus signal"
463
pass
464
465
# CheckerStarted - signal
466
@dbus.service.signal(_interface, signature="s")
467
def CheckerStarted(self, command):
468
"D-Bus signal"
469
pass
470
471
# GetAllProperties - method
472
@dbus.service.method(_interface, out_signature="a{sv}")
473
def GetAllProperties(self):
474
"D-Bus method"
475
return dbus.Dictionary({
476
dbus.String("name"):
477
dbus.String(self.name, variant_level=1),
478
dbus.String("fingerprint"):
479
dbus.String(self.fingerprint, variant_level=1),
480
dbus.String("host"):
481
dbus.String(self.host, variant_level=1),
482
dbus.String("created"):
483
_datetime_to_dbus(self.created, variant_level=1),
484
dbus.String("last_enabled"):
485
(_datetime_to_dbus(self.last_enabled,
486
variant_level=1)
487
if self.last_enabled is not None
488
else dbus.Boolean(False, variant_level=1)),
489
dbus.String("enabled"):
490
dbus.Boolean(self.enabled, variant_level=1),
491
dbus.String("last_checked_ok"):
492
(_datetime_to_dbus(self.last_checked_ok,
493
variant_level=1)
494
if self.last_checked_ok is not None
495
else dbus.Boolean (False, variant_level=1)),
496
dbus.String("timeout"):
497
dbus.UInt64(self.timeout_milliseconds(),
498
variant_level=1),
499
dbus.String("interval"):
500
dbus.UInt64(self.interval_milliseconds(),
501
variant_level=1),
502
dbus.String("checker"):
503
dbus.String(self.checker_command,
504
variant_level=1),
505
dbus.String("checker_running"):
506
dbus.Boolean(self.checker is not None,
507
variant_level=1),
508
dbus.String("object_path"):
509
dbus.ObjectPath(self.dbus_object_path,
510
variant_level=1)
511
}, signature="sv")
512
513
# IsStillValid - method
514
IsStillValid = (dbus.service.method(_interface, out_signature="b")
515
(still_valid))
516
IsStillValid.__name__ = "IsStillValid"
517
518
# PropertyChanged - signal
519
@dbus.service.signal(_interface, signature="sv")
520
def PropertyChanged(self, property, value):
521
"D-Bus signal"
522
pass
523
524
# SetChecker - method
525
@dbus.service.method(_interface, in_signature="s")
526
def SetChecker(self, checker):
527
"D-Bus setter method"
528
self.checker_command = checker
529
# Emit D-Bus signal
530
self.PropertyChanged(dbus.String(u"checker"),
531
dbus.String(self.checker_command,
532
variant_level=1))
533
534
# SetHost - method
535
@dbus.service.method(_interface, in_signature="s")
536
def SetHost(self, host):
537
"D-Bus setter method"
538
self.host = host
539
# Emit D-Bus signal
540
self.PropertyChanged(dbus.String(u"host"),
541
dbus.String(self.host, variant_level=1))
542
543
# SetInterval - method
544
@dbus.service.method(_interface, in_signature="t")
545
def SetInterval(self, milliseconds):
546
self.interval = datetime.timedelta(0, 0, 0, milliseconds)
547
# Emit D-Bus signal
548
self.PropertyChanged(dbus.String(u"interval"),
549
(dbus.UInt64(self.interval_milliseconds(),
550
variant_level=1)))
551
552
# SetSecret - method
553
@dbus.service.method(_interface, in_signature="ay",
554
byte_arrays=True)
555
def SetSecret(self, secret):
556
"D-Bus setter method"
557
self.secret = str(secret)
558
559
# SetTimeout - method
560
@dbus.service.method(_interface, in_signature="t")
561
def SetTimeout(self, milliseconds):
562
self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
563
# Emit D-Bus signal
564
self.PropertyChanged(dbus.String(u"timeout"),
565
(dbus.UInt64(self.timeout_milliseconds(),
566
variant_level=1)))
567
568
# Enable - method
569
Enable = dbus.service.method(_interface)(enable)
570
Enable.__name__ = "Enable"
571
572
# StartChecker - method
573
@dbus.service.method(_interface)
574
def StartChecker(self):
575
"D-Bus method"
576
self.start_checker()
577
578
# Disable - method
579
@dbus.service.method(_interface)
580
def Disable(self):
581
"D-Bus method"
582
self.disable()
583
584
# StopChecker - method
585
StopChecker = dbus.service.method(_interface)(stop_checker)
586
StopChecker.__name__ = "StopChecker"
587
588
del _interface
314
return now < (self.last_seen + self.timeout)
589
315
590
316
591
317
def peer_certificate(session):
592
318
"Return the peer's OpenPGP certificate as a bytestring"
593
319
# 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):
320
if gnutls.library.functions.gnutls_certificate_type_get\
321
(session._c_object) \
322
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP:
597
323
# ...do the normal thing
598
324
return session.peer_certificate
599
list_size = ctypes.c_uint(1)
600
cert_list = (gnutls.library.functions
601
.gnutls_certificate_get_peers
602
(session._c_object, ctypes.byref(list_size)))
603
if not bool(cert_list) and list_size.value != 0:
604
raise gnutls.errors.GNUTLSError("error getting peer"
605
" certificate")
325
list_size = ctypes.c_uint()
326
cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
327
(session._c_object, ctypes.byref(list_size))
606
328
if list_size.value == 0:
607
329
return None
608
330
cert = cert_list[0]
611
333
612
334
def fingerprint(openpgp):
613
335
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
614
# New GnuTLS "datum" with the OpenPGP public key
615
datum = (gnutls.library.types
616
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
617
ctypes.POINTER
618
(ctypes.c_ubyte)),
619
ctypes.c_uint(len(openpgp))))
620
336
# New empty GnuTLS certificate
621
337
crt = gnutls.library.types.gnutls_openpgp_crt_t()
622
(gnutls.library.functions
623
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
338
gnutls.library.functions.gnutls_openpgp_crt_init\
339
(ctypes.byref(crt))
340
# New GnuTLS "datum" with the OpenPGP public key
341
datum = gnutls.library.types.gnutls_datum_t\
342
(ctypes.cast(ctypes.c_char_p(openpgp),
343
ctypes.POINTER(ctypes.c_ubyte)),
344
ctypes.c_uint(len(openpgp)))
624
345
# Import the OpenPGP public key into the certificate
625
(gnutls.library.functions
626
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
627
gnutls.library.constants
628
.GNUTLS_OPENPGP_FMT_RAW))
629
# Verify the self signature in the key
630
crtverify = ctypes.c_uint()
631
(gnutls.library.functions
632
.gnutls_openpgp_crt_verify_self(crt, 0, ctypes.byref(crtverify)))
633
if crtverify.value != 0:
634
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
635
raise gnutls.errors.CertificateSecurityError("Verify failed")
346
ret = gnutls.library.functions.gnutls_openpgp_crt_import\
347
(crt,
348
ctypes.byref(datum),
349
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
636
350
# New buffer for the fingerprint
637
buf = ctypes.create_string_buffer(20)
638
buf_len = ctypes.c_size_t()
351
buffer = ctypes.create_string_buffer(20)
352
buffer_length = ctypes.c_size_t()
639
353
# Get the fingerprint from the certificate into the buffer
640
(gnutls.library.functions
641
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
642
ctypes.byref(buf_len)))
354
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
355
(crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
643
356
# Deinit the certificate
644
357
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
645
358
# Convert the buffer to a Python bytestring
646
fpr = ctypes.string_at(buf, buf_len.value)
359
fpr = ctypes.string_at(buffer, buffer_length.value)
647
360
# Convert the bytestring to hexadecimal notation
648
361
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
649
362
return hex_fpr
650
363
651
364
652
class TCP_handler(SocketServer.BaseRequestHandler, object):
365
class tcp_handler(SocketServer.BaseRequestHandler, object):
653
366
"""A TCP request handler class.
654
367
Instantiated by IPv6_TCPServer for each request to handle it.
655
368
Note: This will run in its own forked process."""
656
369
657
370
def handle(self):
658
logger.info(u"TCP connection from: %s",
659
unicode(self.client_address))
660
session = (gnutls.connection
661
.ClientSession(self.request,
662
gnutls.connection
663
.X509Credentials()))
664
665
line = self.request.makefile().readline()
666
logger.debug(u"Protocol version: %r", line)
667
try:
668
if int(line.strip().split()[0]) > 1:
669
raise RuntimeError
670
except (ValueError, IndexError, RuntimeError), error:
671
logger.error(u"Unknown protocol version: %s", error)
672
return
673
674
# Note: gnutls.connection.X509Credentials is really a generic
675
# GnuTLS certificate credentials object so long as no X.509
676
# keys are added to it. Therefore, we can use it here despite
677
# using OpenPGP certificates.
371
logger.debug(u"TCP connection from: %s",
372
unicode(self.client_address))
373
session = gnutls.connection.ClientSession(self.request,
374
gnutls.connection.\
375
X509Credentials())
678
376
679
377
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
680
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
681
# "+DHE-DSS"))
682
# Use a fallback default, since this MUST be set.
683
priority = self.server.settings.get("priority", "NORMAL")
684
(gnutls.library.functions
685
.gnutls_priority_set_direct(session._c_object,
686
priority, None))
378
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
379
# "+DHE-DSS"))
380
priority = "SECURE256"
381
382
gnutls.library.functions.gnutls_priority_set_direct\
383
(session._c_object, priority, None);
687
384
688
385
try:
689
386
session.handshake()
690
387
except gnutls.errors.GNUTLSError, error:
691
logger.warning(u"Handshake failed: %s", error)
388
logger.debug(u"Handshake failed: %s", error)
692
389
# Do not run session.bye() here: the session is not
693
390
# established. Just abandon the request.
694
391
return
695
logger.debug(u"Handshake succeeded")
696
392
try:
697
393
fpr = fingerprint(peer_certificate(session))
698
394
except (TypeError, gnutls.errors.GNUTLSError), error:
699
logger.warning(u"Bad certificate: %s", error)
395
logger.debug(u"Bad certificate: %s", error)
700
396
session.bye()
701
397
return
702
398
logger.debug(u"Fingerprint: %s", fpr)
703
399
client = None
704
400
for c in self.server.clients:
705
401
if c.fingerprint == fpr:
706
402
client = c
707
403
break
708
else:
709
logger.warning(u"Client not found for fingerprint: %s",
710
fpr)
711
session.bye()
712
return
713
404
# Have to check if client.still_valid(), since it is possible
714
405
# that the client timed out while establishing the GnuTLS
715
406
# session.
716
if not client.still_valid():
717
logger.warning(u"Client %(name)s is invalid",
718
vars(client))
407
if (not client) or (not client.still_valid()):
408
if client:
409
logger.debug(u"Client %(name)s is invalid",
410
vars(client))
411
else:
412
logger.debug(u"Client not found for fingerprint: %s",
413
fpr)
719
414
session.bye()
720
415
return
721
## This won't work here, since we're in a fork.
722
# client.checked_ok()
723
416
sent_size = 0
724
417
while sent_size < len(client.secret):
725
418
sent = session.send(client.secret[sent_size:])
730
423
session.bye()
731
424
732
425
733
class IPv6_TCPServer(SocketServer.ForkingMixIn,
734
SocketServer.TCPServer, object):
426
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
735
427
"""IPv6 TCP server. Accepts 'None' as address and/or port.
736
428
Attributes:
737
settings: Server settings
429
options: Command line options
738
430
clients: Set() of Client objects
739
enabled: Boolean; whether this server is activated yet
740
431
"""
741
432
address_family = socket.AF_INET6
742
433
def __init__(self, *args, **kwargs):
743
if "settings" in kwargs:
744
self.settings = kwargs["settings"]
745
del kwargs["settings"]
434
if "options" in kwargs:
435
self.options = kwargs["options"]
436
del kwargs["options"]
746
437
if "clients" in kwargs:
747
438
self.clients = kwargs["clients"]
748
439
del kwargs["clients"]
749
self.enabled = False
750
super(IPv6_TCPServer, self).__init__(*args, **kwargs)
440
return super(type(self), self).__init__(*args, **kwargs)
751
441
def server_bind(self):
752
442
"""This overrides the normal server_bind() function
753
443
to bind to an interface if one was specified, and also NOT to
754
444
bind to an address or port if they were not specified."""
755
if self.settings["interface"]:
756
# 25 is from /usr/include/asm-i486/socket.h
757
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
445
if self.options.interface:
446
if not hasattr(socket, "SO_BINDTODEVICE"):
447
# From /usr/include/asm-i486/socket.h
448
socket.SO_BINDTODEVICE = 25
758
449
try:
759
450
self.socket.setsockopt(socket.SOL_SOCKET,
760
SO_BINDTODEVICE,
761
self.settings["interface"])
451
socket.SO_BINDTODEVICE,
452
self.options.interface)
762
453
except socket.error, error:
763
454
if error[0] == errno.EPERM:
764
logger.error(u"No permission to"
765
u" bind to interface %s",
766
self.settings["interface"])
455
logger.warning(u"No permission to"
456
u" bind to interface %s",
457
self.options.interface)
767
458
else:
768
raise
459
raise error
769
460
# Only bind(2) the socket if we really need to.
770
461
if self.server_address[0] or self.server_address[1]:
771
462
if not self.server_address[0]:
772
463
in6addr_any = "::"
773
464
self.server_address = (in6addr_any,
774
465
self.server_address[1])
775
elif not self.server_address[1]:
466
elif self.server_address[1] is None:
776
467
self.server_address = (self.server_address[0],
777
468
0)
778
# if self.settings["interface"]:
779
# self.server_address = (self.server_address[0],
780
# 0, # port
781
# 0, # flowinfo
782
# if_nametoindex
783
# (self.settings
784
# ["interface"]))
785
return super(IPv6_TCPServer, self).server_bind()
786
def server_activate(self):
787
if self.enabled:
788
return super(IPv6_TCPServer, self).server_activate()
789
def enable(self):
790
self.enabled = True
469
return super(type(self), self).server_bind()
791
470
792
471
793
472
def string_to_delta(interval):
794
473
"""Parse a string and return a datetime.timedelta
795
474
796
475
>>> string_to_delta('7d')
797
476
datetime.timedelta(7)
798
477
>>> string_to_delta('60s')
803
482
datetime.timedelta(1)
804
483
>>> string_to_delta(u'1w')
805
484
datetime.timedelta(7)
806
>>> string_to_delta('5m 30s')
807
datetime.timedelta(0, 330)
808
485
"""
809
timevalue = datetime.timedelta(0)
810
for s in interval.split():
811
try:
812
suffix = unicode(s[-1])
813
value = int(s[:-1])
814
if suffix == u"d":
815
delta = datetime.timedelta(value)
816
elif suffix == u"s":
817
delta = datetime.timedelta(0, value)
818
elif suffix == u"m":
819
delta = datetime.timedelta(0, 0, 0, 0, value)
820
elif suffix == u"h":
821
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
822
elif suffix == u"w":
823
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
824
else:
825
raise ValueError
826
except (ValueError, IndexError):
486
try:
487
suffix=unicode(interval[-1])
488
value=int(interval[:-1])
489
if suffix == u"d":
490
delta = datetime.timedelta(value)
491
elif suffix == u"s":
492
delta = datetime.timedelta(0, value)
493
elif suffix == u"m":
494
delta = datetime.timedelta(0, 0, 0, 0, value)
495
elif suffix == u"h":
496
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
497
elif suffix == u"w":
498
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
499
else:
827
500
raise ValueError
828
timevalue += delta
829
return timevalue
501
except (ValueError, IndexError):
502
raise ValueError
503
return delta
504
505
506
def add_service():
507
"""Derived from the Avahi example code"""
508
global group, serviceName, serviceType, servicePort, serviceTXT, \
509
domain, host
510
if group is None:
511
group = dbus.Interface(
512
bus.get_object( avahi.DBUS_NAME,
513
server.EntryGroupNew()),
514
avahi.DBUS_INTERFACE_ENTRY_GROUP)
515
group.connect_to_signal('StateChanged',
516
entry_group_state_changed)
517
logger.debug(u"Adding service '%s' of type '%s' ...",
518
serviceName, serviceType)
519
520
group.AddService(
521
serviceInterface, # interface
522
avahi.PROTO_INET6, # protocol
523
dbus.UInt32(0), # flags
524
serviceName, serviceType,
525
domain, host,
526
dbus.UInt16(servicePort),
527
avahi.string_array_to_txt_array(serviceTXT))
528
group.Commit()
529
530
531
def remove_service():
532
"""From the Avahi example code"""
533
global group
534
535
if not group is None:
536
group.Reset()
830
537
831
538
832
539
def server_state_changed(state):
833
540
"""Derived from the Avahi example code"""
834
541
if state == avahi.SERVER_COLLISION:
835
logger.error(u"Zeroconf server name collision")
836
service.remove()
542
logger.warning(u"Server name collision")
543
remove_service()
837
544
elif state == avahi.SERVER_RUNNING:
838
service.add()
545
add_service()
839
546
840
547
841
548
def entry_group_state_changed(state, error):
842
549
"""Derived from the Avahi example code"""
843
logger.debug(u"Avahi state change: %i", state)
550
global serviceName, server, rename_count
551
552
logger.debug(u"state change: %i", state)
844
553
845
554
if state == avahi.ENTRY_GROUP_ESTABLISHED:
846
logger.debug(u"Zeroconf service established.")
555
logger.debug(u"Service established.")
847
556
elif state == avahi.ENTRY_GROUP_COLLISION:
848
logger.warning(u"Zeroconf service name collision.")
849
service.rename()
557
558
rename_count = rename_count - 1
559
if rename_count > 0:
560
name = server.GetAlternativeServiceName(name)
561
logger.warning(u"Service name collision, "
562
u"changing name to '%s' ...", name)
563
remove_service()
564
add_service()
565
566
else:
567
logger.error(u"No suitable service name found after %i"
568
u" retries, exiting.", n_rename)
569
killme(1)
850
570
elif state == avahi.ENTRY_GROUP_FAILURE:
851
logger.critical(u"Avahi: Error in group state changed %s",
852
unicode(error))
853
raise AvahiGroupError(u"State changed: %s" % unicode(error))
571
logger.error(u"Error in group state changed %s",
572
unicode(error))
573
killme(1)
574
854
575
855
576
def if_nametoindex(interface):
856
"""Call the C function if_nametoindex(), or equivalent"""
857
global if_nametoindex
577
"""Call the C function if_nametoindex()"""
858
578
try:
859
if_nametoindex = (ctypes.cdll.LoadLibrary
860
(ctypes.util.find_library("c"))
861
.if_nametoindex)
579
libc = ctypes.cdll.LoadLibrary("libc.so.6")
580
return libc.if_nametoindex(interface)
862
581
except (OSError, AttributeError):
863
582
if "struct" not in sys.modules:
864
583
import struct
865
584
if "fcntl" not in sys.modules:
866
585
import fcntl
867
def if_nametoindex(interface):
868
"Get an interface index the hard way, i.e. using fcntl()"
869
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
870
with closing(socket.socket()) as s:
871
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
872
struct.pack("16s16x", interface))
873
interface_index = struct.unpack("I", ifreq[16:20])[0]
874
return interface_index
875
return if_nametoindex(interface)
876
877
878
def daemon(nochdir = False, noclose = False):
586
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
587
s = socket.socket()
588
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
589
struct.pack("16s16x", interface))
590
s.close()
591
interface_index = struct.unpack("I", ifreq[16:20])[0]
592
return interface_index
593
594
595
def daemon(nochdir, noclose):
879
596
"""See daemon(3). Standard BSD Unix function.
880
597
This should really exist as os.daemon, but it doesn't (yet)."""
881
598
if os.fork():
883
600
os.setsid()
884
601
if not nochdir:
885
602
os.chdir("/")
886
if os.fork():
887
sys.exit()
888
603
if not noclose:
889
604
# Close all standard open file descriptors
890
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
605
null = os.open("/dev/null", os.O_NOCTTY | os.O_RDWR)
891
606
if not stat.S_ISCHR(os.fstat(null).st_mode):
892
607
raise OSError(errno.ENODEV,
893
608
"/dev/null not a character device")
898
613
os.close(null)
899
614
900
615
616
def killme(status = 0):
617
logger.debug("Stopping server with exit status %d", status)
618
exitstatus = status
619
if main_loop_started:
620
main_loop.quit()
621
else:
622
sys.exit(status)
623
624
901
625
def main():
902
parser = optparse.OptionParser(version = "%%prog %s" % version)
626
global exitstatus
627
exitstatus = 0
628
global main_loop_started
629
main_loop_started = False
630
631
parser = OptionParser()
903
632
parser.add_option("-i", "--interface", type="string",
904
metavar="IF", help="Bind to interface IF")
905
parser.add_option("-a", "--address", type="string",
633
default=None, metavar="IF",
634
help="Bind to interface IF")
635
parser.add_option("-a", "--address", type="string", default=None,
906
636
help="Address to listen for requests on")
907
parser.add_option("-p", "--port", type="int",
637
parser.add_option("-p", "--port", type="int", default=None,
908
638
help="Port number to receive requests on")
909
parser.add_option("--check", action="store_true",
639
parser.add_option("--timeout", type="string", # Parsed later
640
default="1h",
641
help="Amount of downtime allowed for clients")
642
parser.add_option("--interval", type="string", # Parsed later
643
default="5m",
644
help="How often to check that a client is up")
645
parser.add_option("--check", action="store_true", default=False,
910
646
help="Run self-test")
911
parser.add_option("--debug", action="store_true",
912
help="Debug mode; run in foreground and log to"
913
" terminal")
914
parser.add_option("--priority", type="string", help="GnuTLS"
915
" priority string (see GnuTLS documentation)")
916
parser.add_option("--servicename", type="string", metavar="NAME",
917
help="Zeroconf service name")
918
parser.add_option("--configdir", type="string",
919
default="/etc/mandos", metavar="DIR",
920
help="Directory to search for configuration"
921
" files")
922
parser.add_option("--no-dbus", action="store_false",
923
dest="use_dbus",
924
help="Do not provide D-Bus system bus"
925
" interface")
926
options = parser.parse_args()[0]
647
parser.add_option("--debug", action="store_true", default=False,
648
help="Debug mode")
649
(options, args) = parser.parse_args()
927
650
928
651
if options.check:
929
652
import doctest
930
653
doctest.testmod()
931
654
sys.exit()
932
655
933
# Default values for config file for server-global settings
934
server_defaults = { "interface": "",
935
"address": "",
936
"port": "",
937
"debug": "False",
938
"priority":
939
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
940
"servicename": "Mandos",
941
"use_dbus": "True",
942
}
943
944
# Parse config file for server-global settings
945
server_config = ConfigParser.SafeConfigParser(server_defaults)
946
del server_defaults
947
server_config.read(os.path.join(options.configdir, "mandos.conf"))
948
# Convert the SafeConfigParser object to a dict
949
server_settings = server_config.defaults()
950
# Use the appropriate methods on the non-string config options
951
server_settings["debug"] = server_config.getboolean("DEFAULT",
952
"debug")
953
server_settings["use_dbus"] = server_config.getboolean("DEFAULT",
954
"use_dbus")
955
if server_settings["port"]:
956
server_settings["port"] = server_config.getint("DEFAULT",
957
"port")
958
del server_config
959
960
# Override the settings from the config file with command line
961
# options, if set.
962
for option in ("interface", "address", "port", "debug",
963
"priority", "servicename", "configdir",
964
"use_dbus"):
965
value = getattr(options, option)
966
if value is not None:
967
server_settings[option] = value
968
del options
969
# Now we have our good server settings in "server_settings"
970
971
# For convenience
972
debug = server_settings["debug"]
973
use_dbus = server_settings["use_dbus"]
974
975
if not debug:
976
syslogger.setLevel(logging.WARNING)
977
console.setLevel(logging.WARNING)
978
979
if server_settings["servicename"] != "Mandos":
980
syslogger.setFormatter(logging.Formatter
981
('Mandos (%s): %%(levelname)s:'
982
' %%(message)s'
983
% server_settings["servicename"]))
984
985
# Parse config file with clients
986
client_defaults = { "timeout": "1h",
987
"interval": "5m",
988
"checker": "fping -q -- %%(host)s",
989
"host": "",
990
}
991
client_config = ConfigParser.SafeConfigParser(client_defaults)
992
client_config.read(os.path.join(server_settings["configdir"],
993
"clients.conf"))
994
995
clients = Set()
996
tcp_server = IPv6_TCPServer((server_settings["address"],
997
server_settings["port"]),
998
TCP_handler,
999
settings=server_settings,
1000
clients=clients)
1001
pidfilename = "/var/run/mandos.pid"
1002
try:
1003
pidfile = open(pidfilename, "w")
1004
except IOError:
1005
logger.error("Could not open file %r", pidfilename)
1006
1007
try:
1008
uid = pwd.getpwnam("_mandos").pw_uid
1009
gid = pwd.getpwnam("_mandos").pw_gid
1010
except KeyError:
1011
try:
1012
uid = pwd.getpwnam("mandos").pw_uid
1013
gid = pwd.getpwnam("mandos").pw_gid
1014
except KeyError:
1015
try:
1016
uid = pwd.getpwnam("nobody").pw_uid
1017
gid = pwd.getpwnam("nogroup").pw_gid
1018
except KeyError:
1019
uid = 65534
1020
gid = 65534
1021
try:
1022
os.setgid(gid)
1023
os.setuid(uid)
1024
except OSError, error:
1025
if error[0] != errno.EPERM:
1026
raise error
1027
1028
# Enable all possible GnuTLS debugging
1029
if debug:
1030
# "Use a log level over 10 to enable all debugging options."
1031
# - GnuTLS manual
1032
gnutls.library.functions.gnutls_global_set_log_level(11)
1033
1034
@gnutls.library.types.gnutls_log_func
1035
def debug_gnutls(level, string):
1036
logger.debug("GnuTLS: %s", string[:-1])
1037
1038
(gnutls.library.functions
1039
.gnutls_global_set_log_function(debug_gnutls))
1040
1041
global service
1042
service = AvahiService(name = server_settings["servicename"],
1043
servicetype = "_mandos._tcp", )
1044
if server_settings["interface"]:
1045
service.interface = (if_nametoindex
1046
(server_settings["interface"]))
656
# Parse the time arguments
657
try:
658
options.timeout = string_to_delta(options.timeout)
659
except ValueError:
660
parser.error("option --timeout: Unparseable time")
661
try:
662
options.interval = string_to_delta(options.interval)
663
except ValueError:
664
parser.error("option --interval: Unparseable time")
665
666
# Parse config file
667
defaults = { "checker": "fping -q -- %%(fqdn)s" }
668
client_config = ConfigParser.SafeConfigParser(defaults)
669
#client_config.readfp(open("global.conf"), "global.conf")
670
client_config.read("mandos-clients.conf")
1047
671
1048
672
global main_loop
1049
673
global bus
1052
676
DBusGMainLoop(set_as_default=True )
1053
677
main_loop = gobject.MainLoop()
1054
678
bus = dbus.SystemBus()
1055
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
1056
avahi.DBUS_PATH_SERVER),
1057
avahi.DBUS_INTERFACE_SERVER)
679
server = dbus.Interface(
680
bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
681
avahi.DBUS_INTERFACE_SERVER )
1058
682
# End of Avahi example code
1059
if use_dbus:
1060
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
1061
1062
clients.update(Set(Client(name = section,
1063
config
1064
= dict(client_config.items(section)),
1065
use_dbus = use_dbus)
683
684
debug = options.debug
685
686
if debug:
687
console = logging.StreamHandler()
688
# console.setLevel(logging.DEBUG)
689
console.setFormatter(logging.Formatter\
690
('%(levelname)s: %(message)s'))
691
logger.addHandler(console)
692
del console
693
694
clients = Set()
695
def remove_from_clients(client):
696
clients.remove(client)
697
if not clients:
698
logger.debug(u"No clients left, exiting")
699
killme()
700
701
clients.update(Set(Client(name=section, options=options,
702
stop_hook = remove_from_clients,
703
**(dict(client_config\
704
.items(section))))
1066
705
for section in client_config.sections()))
1067
if not clients:
1068
logger.warning(u"No clients defined")
1069
1070
if debug:
1071
# Redirect stdin so all checkers get /dev/null
1072
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1073
os.dup2(null, sys.stdin.fileno())
1074
if null > 2:
1075
os.close(null)
1076
else:
1077
# No console logging
1078
logger.removeHandler(console)
1079
# Close all input and output, do double fork, etc.
1080
daemon()
1081
1082
try:
1083
pid = os.getpid()
1084
pidfile.write(str(pid) + "\n")
1085
pidfile.close()
1086
del pidfile
1087
except IOError:
1088
logger.error(u"Could not write to file %r with PID %d",
1089
pidfilename, pid)
1090
except NameError:
1091
# "pidfile" was never created
1092
pass
1093
del pidfilename
706
707
if not debug:
708
daemon(False, False)
1094
709
1095
710
def cleanup():
1096
711
"Cleanup function; run on exit"
1103
718
1104
719
while clients:
1105
720
client = clients.pop()
1106
client.disable_hook = None
1107
client.disable()
721
client.stop_hook = None
722
client.stop()
1108
723
1109
724
atexit.register(cleanup)
1110
725
1111
726
if not debug:
1112
727
signal.signal(signal.SIGINT, signal.SIG_IGN)
1113
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1114
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1115
1116
if use_dbus:
1117
class MandosServer(dbus.service.Object):
1118
"""A D-Bus proxy object"""
1119
def __init__(self):
1120
dbus.service.Object.__init__(self, bus, "/")
1121
_interface = u"se.bsnet.fukt.Mandos"
1122
1123
@dbus.service.signal(_interface, signature="oa{sv}")
1124
def ClientAdded(self, objpath, properties):
1125
"D-Bus signal"
1126
pass
1127
1128
@dbus.service.signal(_interface, signature="os")
1129
def ClientRemoved(self, objpath, name):
1130
"D-Bus signal"
1131
pass
1132
1133
@dbus.service.method(_interface, out_signature="ao")
1134
def GetAllClients(self):
1135
"D-Bus method"
1136
return dbus.Array(c.dbus_object_path for c in clients)
1137
1138
@dbus.service.method(_interface, out_signature="a{oa{sv}}")
1139
def GetAllClientsWithProperties(self):
1140
"D-Bus method"
1141
return dbus.Dictionary(
1142
((c.dbus_object_path, c.GetAllProperties())
1143
for c in clients),
1144
signature="oa{sv}")
1145
1146
@dbus.service.method(_interface, in_signature="o")
1147
def RemoveClient(self, object_path):
1148
"D-Bus method"
1149
for c in clients:
1150
if c.dbus_object_path == object_path:
1151
clients.remove(c)
1152
# Don't signal anything except ClientRemoved
1153
c.use_dbus = False
1154
c.disable()
1155
# Emit D-Bus signal
1156
self.ClientRemoved(object_path, c.name)
1157
return
1158
raise KeyError
1159
1160
del _interface
1161
1162
mandos_server = MandosServer()
728
signal.signal(signal.SIGHUP, lambda signum, frame: killme())
729
signal.signal(signal.SIGTERM, lambda signum, frame: killme())
1163
730
1164
731
for client in clients:
1165
if use_dbus:
1166
# Emit D-Bus signal
1167
mandos_server.ClientAdded(client.dbus_object_path,
1168
client.GetAllProperties())
1169
client.enable()
1170
1171
tcp_server.enable()
1172
tcp_server.server_activate()
1173
1174
# Find out what port we got
1175
service.port = tcp_server.socket.getsockname()[1]
1176
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
1177
u" scope_id %d" % tcp_server.socket.getsockname())
1178
1179
#service.interface = tcp_server.socket.getsockname()[3]
1180
1181
try:
1182
# From the Avahi example code
1183
server.connect_to_signal("StateChanged", server_state_changed)
1184
try:
1185
server_state_changed(server.GetState())
1186
except dbus.exceptions.DBusException, error:
1187
logger.critical(u"DBusException: %s", error)
1188
sys.exit(1)
1189
# End of Avahi example code
1190
1191
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
1192
lambda *args, **kwargs:
1193
(tcp_server.handle_request
1194
(*args[2:], **kwargs) or True))
1195
1196
logger.debug(u"Starting main loop")
732
client.start()
733
734
tcp_server = IPv6_TCPServer((options.address, options.port),
735
tcp_handler,
736
options=options,
737
clients=clients)
738
# Find out what random port we got
739
global servicePort
740
servicePort = tcp_server.socket.getsockname()[1]
741
logger.debug(u"Now listening on port %d", servicePort)
742
743
if options.interface is not None:
744
global serviceInterface
745
serviceInterface = if_nametoindex(options.interface)
746
747
# From the Avahi example code
748
server.connect_to_signal("StateChanged", server_state_changed)
749
try:
750
server_state_changed(server.GetState())
751
except dbus.exceptions.DBusException, error:
752
logger.critical(u"DBusException: %s", error)
753
killme(1)
754
# End of Avahi example code
755
756
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
757
lambda *args, **kwargs:
758
tcp_server.handle_request(*args[2:],
759
**kwargs) or True)
760
try:
761
logger.debug("Starting main loop")
762
main_loop_started = True
1197
763
main_loop.run()
1198
except AvahiError, error:
1199
logger.critical(u"AvahiError: %s", error)
1200
sys.exit(1)
1201
764
except KeyboardInterrupt:
1202
765
if debug:
1203
print >> sys.stderr
1204
logger.debug("Server received KeyboardInterrupt")
1205
logger.debug("Server exiting")
766
print
767
768
sys.exit(exitstatus)
1206
769
1207
770
if __name__ == '__main__':
1208
771
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0