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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 © 2008,2009 Teddy Hogeborn
15
# Copyright © 2008,2009 Björn Påhlsson
16
#
17
# This program is free software: you can redistribute it and/or modify
18
# it under the terms of the GNU General Public License as published by
19
# the Free Software Foundation, either version 3 of the License, or
20
# (at your option) any later version.
21
#
22
# This program is distributed in the hope that it will be useful,
23
# but WITHOUT ANY WARRANTY; without even the implied warranty of
24
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
25
# GNU General Public License for more details.
26
#
27
# You should have received a copy of the GNU General Public License
28
# along with this program. If not, see
29
# <http://www.gnu.org/licenses/>.
30
#
31
# Contact the authors at <mandos@fukt.bsnet.se>.
32
#
33
2
34
from __future__ import division, with_statement, absolute_import
3
from __future__ import division
35
4
36
5
import SocketServer
37
6
import socket
38
import optparse
7
import select
8
from optparse import OptionParser
39
9
import datetime
40
10
import errno
41
11
import gnutls.crypto
51
21
import signal
52
22
from sets import Set
53
23
import subprocess
54
import atexit
55
import stat
56
import logging
57
import logging.handlers
58
import pwd
59
from contextlib import closing
60
24
61
25
import dbus
62
import dbus.service
63
26
import gobject
64
27
import avahi
65
28
from dbus.mainloop.glib import DBusGMainLoop
66
29
import ctypes
67
import ctypes.util
68
69
version = "1.0.8"
30
31
import logging
32
import logging.handlers
33
34
# logghandler.setFormatter(logging.Formatter('%(levelname)s %(message)s')
70
35
71
36
logger = logging.Logger('mandos')
72
syslogger = (logging.handlers.SysLogHandler
73
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
74
address = "/dev/log"))
75
syslogger.setFormatter(logging.Formatter
76
('Mandos [%(process)d]: %(levelname)s:'
77
' %(message)s'))
78
logger.addHandler(syslogger)
79
80
console = logging.StreamHandler()
81
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
82
' %(levelname)s: %(message)s'))
83
logger.addHandler(console)
84
85
class AvahiError(Exception):
86
def __init__(self, value, *args, **kwargs):
87
self.value = value
88
super(AvahiError, self).__init__(value, *args, **kwargs)
89
def __unicode__(self):
90
return unicode(repr(self.value))
91
92
class AvahiServiceError(AvahiError):
93
pass
94
95
class AvahiGroupError(AvahiError):
96
pass
97
98
99
class AvahiService(object):
100
"""An Avahi (Zeroconf) service.
101
Attributes:
102
interface: integer; avahi.IF_UNSPEC or an interface index.
103
Used to optionally bind to the specified interface.
104
name: string; Example: 'Mandos'
105
type: string; Example: '_mandos._tcp'.
106
See <http://www.dns-sd.org/ServiceTypes.html>
107
port: integer; what port to announce
108
TXT: list of strings; TXT record for the service
109
domain: string; Domain to publish on, default to .local if empty.
110
host: string; Host to publish records for, default is localhost
111
max_renames: integer; maximum number of renames
112
rename_count: integer; counter so we only rename after collisions
113
a sensible number of times
114
"""
115
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
116
servicetype = None, port = None, TXT = None,
117
domain = "", host = "", max_renames = 32768,
118
protocol = avahi.PROTO_UNSPEC):
119
self.interface = interface
120
self.name = name
121
self.type = servicetype
122
self.port = port
123
self.TXT = TXT if TXT is not None else []
124
self.domain = domain
125
self.host = host
126
self.rename_count = 0
127
self.max_renames = max_renames
128
self.protocol = protocol
129
def rename(self):
130
"""Derived from the Avahi example code"""
131
if self.rename_count >= self.max_renames:
132
logger.critical(u"No suitable Zeroconf service name found"
133
u" after %i retries, exiting.",
134
self.rename_count)
135
raise AvahiServiceError(u"Too many renames")
136
self.name = server.GetAlternativeServiceName(self.name)
137
logger.info(u"Changing Zeroconf service name to %r ...",
138
str(self.name))
139
syslogger.setFormatter(logging.Formatter
140
('Mandos (%s): %%(levelname)s:'
141
' %%(message)s' % self.name))
142
self.remove()
143
self.add()
144
self.rename_count += 1
145
def remove(self):
146
"""Derived from the Avahi example code"""
147
if group is not None:
148
group.Reset()
149
def add(self):
150
"""Derived from the Avahi example code"""
151
global group
152
if group is None:
153
group = dbus.Interface(bus.get_object
154
(avahi.DBUS_NAME,
155
server.EntryGroupNew()),
156
avahi.DBUS_INTERFACE_ENTRY_GROUP)
157
group.connect_to_signal('StateChanged',
158
entry_group_state_changed)
159
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
160
service.name, service.type)
161
group.AddService(
162
self.interface, # interface
163
self.protocol, # protocol
164
dbus.UInt32(0), # flags
165
self.name, self.type,
166
self.domain, self.host,
167
dbus.UInt16(self.port),
168
avahi.string_array_to_txt_array(self.TXT))
169
group.Commit()
170
171
# From the Avahi example code:
172
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
173
53
# End of Avahi example code
174
54
175
55
176
def _datetime_to_dbus(dt, variant_level=0):
177
"""Convert a UTC datetime.datetime() to a D-Bus type."""
178
return dbus.String(dt.isoformat(), variant_level=variant_level)
179
180
181
class Client(dbus.service.Object):
56
class Client(object):
182
57
"""A representation of a client host served by this server.
183
58
Attributes:
184
name: string; from the config file, used in log messages and
185
D-Bus identifiers
59
name: string; from the config file, used in log messages
186
60
fingerprint: string (40 or 32 hexadecimal digits); used to
187
61
uniquely identify the client
188
secret: bytestring; sent verbatim (over TLS) to client
189
host: string; available for use by the checker command
190
created: datetime.datetime(); (UTC) object creation
191
last_enabled: datetime.datetime(); (UTC)
192
enabled: bool()
193
last_checked_ok: datetime.datetime(); (UTC) or None
194
timeout: datetime.timedelta(); How long from last_checked_ok
195
until this client is invalid
196
interval: datetime.timedelta(); How often to start a new checker
197
disable_hook: If set, called by disable() as disable_hook(self)
198
checker: subprocess.Popen(); a running checker process used
199
to see if the client lives.
200
'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.
201
73
checker_initiator_tag: a gobject event source tag, or None
202
disable_initiator_tag: - '' -
74
stop_initiator_tag: - '' -
203
75
checker_callback_tag: - '' -
204
76
checker_command: string; External command which is run to check if
205
client lives. %() expansions are done at
77
client lives. %()s expansions are done at
206
78
runtime with vars(self) as dict, so that for
207
79
instance %(name)s can be used in the command.
208
current_checker_command: string; current running checker_command
209
use_dbus: bool(); Whether to provide D-Bus interface and signals
210
dbus_object_path: dbus.ObjectPath ; only set if self.use_dbus
80
Private attibutes:
81
_timeout: Real variable for 'timeout'
82
_interval: Real variable for 'interval'
83
_timeout_milliseconds: Used by gobject.timeout_add()
84
_interval_milliseconds: - '' -
211
85
"""
212
def timeout_milliseconds(self):
213
"Return the 'timeout' attribute in milliseconds"
214
return ((self.timeout.days * 24 * 60 * 60 * 1000)
215
+ (self.timeout.seconds * 1000)
216
+ (self.timeout.microseconds // 1000))
217
218
def interval_milliseconds(self):
219
"Return the 'interval' attribute in milliseconds"
220
return ((self.interval.days * 24 * 60 * 60 * 1000)
221
+ (self.interval.seconds * 1000)
222
+ (self.interval.microseconds // 1000))
223
224
def __init__(self, name = None, disable_hook=None, config=None,
225
use_dbus=True):
226
"""Note: the 'checker' key in 'config' sets the
227
'checker_command' attribute and *not* the 'checker'
228
attribute."""
86
def _set_timeout(self, timeout):
87
"Setter function for 'timeout' attribute"
88
self._timeout = timeout
89
self._timeout_milliseconds = ((self.timeout.days
90
* 24 * 60 * 60 * 1000)
91
+ (self.timeout.seconds * 1000)
92
+ (self.timeout.microseconds
93
// 1000))
94
timeout = property(lambda self: self._timeout,
95
_set_timeout)
96
del _set_timeout
97
def _set_interval(self, interval):
98
"Setter function for 'interval' attribute"
99
self._interval = interval
100
self._interval_milliseconds = ((self.interval.days
101
* 24 * 60 * 60 * 1000)
102
+ (self.interval.seconds
103
* 1000)
104
+ (self.interval.microseconds
105
// 1000))
106
interval = property(lambda self: self._interval,
107
_set_interval)
108
del _set_interval
109
def __init__(self, name=None, options=None, stop_hook=None,
110
fingerprint=None, secret=None, secfile=None, fqdn=None,
111
timeout=None, interval=-1, checker=None):
229
112
self.name = name
230
if config is None:
231
config = {}
232
logger.debug(u"Creating client %r", self.name)
233
self.use_dbus = False # During __init__
234
# Uppercase and remove spaces from fingerprint for later
235
# comparison purposes with return value from the fingerprint()
236
# function
237
self.fingerprint = (config["fingerprint"].upper()
238
.replace(u" ", u""))
239
logger.debug(u" Fingerprint: %s", self.fingerprint)
240
if "secret" in config:
241
self.secret = config["secret"].decode(u"base64")
242
elif "secfile" in config:
243
with closing(open(os.path.expanduser
244
(os.path.expandvars
245
(config["secfile"])))) as secfile:
246
self.secret = secfile.read()
247
else:
248
raise TypeError(u"No secret or secfile for client %s"
249
% self.name)
250
self.host = config.get("host", "")
251
self.created = datetime.datetime.utcnow()
252
self.enabled = False
253
self.last_enabled = None
254
self.last_checked_ok = None
255
self.timeout = string_to_delta(config["timeout"])
256
self.interval = string_to_delta(config["interval"])
257
self.disable_hook = disable_hook
113
# Uppercase and remove spaces from fingerprint
114
# for later comparison purposes with return value of
115
# the fingerprint() function
116
self.fingerprint = fingerprint.upper().replace(u" ", u"")
117
if secret:
118
self.secret = secret.decode(u"base64")
119
elif secfile:
120
sf = open(secfile)
121
self.secret = sf.read()
122
sf.close()
123
else:
124
raise RuntimeError(u"No secret or secfile for client %s"
125
% self.name)
126
self.fqdn = fqdn # string
127
self.created = datetime.datetime.now()
128
self.last_seen = None
129
if timeout is None:
130
timeout = options.timeout
131
self.timeout = timeout
132
if interval == -1:
133
interval = options.interval
134
else:
135
interval = string_to_delta(interval)
136
self.interval = interval
137
self.stop_hook = stop_hook
258
138
self.checker = None
259
139
self.checker_initiator_tag = None
260
self.disable_initiator_tag = None
140
self.stop_initiator_tag = None
261
141
self.checker_callback_tag = None
262
self.checker_command = config["checker"]
263
self.current_checker_command = None
264
self.last_connect = None
265
# Only now, when this client is initialized, can it show up on
266
# the D-Bus
267
self.use_dbus = use_dbus
268
if self.use_dbus:
269
self.dbus_object_path = (dbus.ObjectPath
270
("/clients/"
271
+ self.name.replace(".", "_")))
272
dbus.service.Object.__init__(self, bus,
273
self.dbus_object_path)
274
275
def enable(self):
276
"""Start this client's checker and timeout hooks"""
277
self.last_enabled = datetime.datetime.utcnow()
142
self.check_command = checker
143
def start(self):
144
"""Start this clients checker and timeout hooks"""
278
145
# Schedule a new checker to be started an 'interval' from now,
279
146
# and every interval from then on.
280
self.checker_initiator_tag = (gobject.timeout_add
281
(self.interval_milliseconds(),
282
self.start_checker))
147
self.checker_initiator_tag = gobject.timeout_add\
148
(self._interval_milliseconds,
149
self.start_checker)
283
150
# Also start a new checker *right now*.
284
151
self.start_checker()
285
# Schedule a disable() when 'timeout' has passed
286
self.disable_initiator_tag = (gobject.timeout_add
287
(self.timeout_milliseconds(),
288
self.disable))
289
self.enabled = True
290
if self.use_dbus:
291
# Emit D-Bus signals
292
self.PropertyChanged(dbus.String(u"enabled"),
293
dbus.Boolean(True, variant_level=1))
294
self.PropertyChanged(dbus.String(u"last_enabled"),
295
(_datetime_to_dbus(self.last_enabled,
296
variant_level=1)))
297
298
def disable(self):
299
"""Disable this client."""
300
if not getattr(self, "enabled", False):
301
return False
302
logger.info(u"Disabling client %s", self.name)
303
if getattr(self, "disable_initiator_tag", False):
304
gobject.source_remove(self.disable_initiator_tag)
305
self.disable_initiator_tag = None
306
if getattr(self, "checker_initiator_tag", False):
152
# Schedule a stop() when 'timeout' has passed
153
self.stop_initiator_tag = gobject.timeout_add\
154
(self._timeout_milliseconds,
155
self.stop)
156
def stop(self):
157
"""Stop this client.
158
The possibility that this client might be restarted is left
159
open, but not currently used."""
160
logger.debug(u"Stopping client %s", self.name)
161
self.secret = None
162
if self.stop_initiator_tag:
163
gobject.source_remove(self.stop_initiator_tag)
164
self.stop_initiator_tag = None
165
if self.checker_initiator_tag:
307
166
gobject.source_remove(self.checker_initiator_tag)
308
167
self.checker_initiator_tag = None
309
168
self.stop_checker()
310
if self.disable_hook:
311
self.disable_hook(self)
312
self.enabled = False
313
if self.use_dbus:
314
# Emit D-Bus signal
315
self.PropertyChanged(dbus.String(u"enabled"),
316
dbus.Boolean(False, variant_level=1))
169
if self.stop_hook:
170
self.stop_hook(self)
317
171
# Do not run this again if called by a gobject.timeout_add
318
172
return False
319
320
173
def __del__(self):
321
self.disable_hook = None
322
self.disable()
323
324
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):
325
185
"""The checker has completed, so take appropriate actions."""
326
self.checker_callback_tag = None
327
self.checker = None
328
if self.use_dbus:
329
# Emit D-Bus signal
330
self.PropertyChanged(dbus.String(u"checker_running"),
331
dbus.Boolean(False, variant_level=1))
332
if os.WIFEXITED(condition):
333
exitstatus = os.WEXITSTATUS(condition)
334
if exitstatus == 0:
335
logger.info(u"Checker for %(name)s succeeded",
336
vars(self))
337
self.checked_ok()
338
else:
339
logger.info(u"Checker for %(name)s failed",
340
vars(self))
341
if self.use_dbus:
342
# Emit D-Bus signal
343
self.CheckerCompleted(dbus.Int16(exitstatus),
344
dbus.Int64(condition),
345
dbus.String(command))
346
else:
186
now = datetime.datetime.now()
187
if os.WIFEXITED(condition) \
188
and (os.WEXITSTATUS(condition) == 0):
189
logger.debug(u"Checker for %(name)s succeeded",
190
vars(self))
191
self.last_seen = now
192
gobject.source_remove(self.stop_initiator_tag)
193
self.stop_initiator_tag = gobject.timeout_add\
194
(self._timeout_milliseconds,
195
self.stop)
196
if not os.WIFEXITED(condition):
347
197
logger.warning(u"Checker for %(name)s crashed?",
348
198
vars(self))
349
if self.use_dbus:
350
# Emit D-Bus signal
351
self.CheckerCompleted(dbus.Int16(-1),
352
dbus.Int64(condition),
353
dbus.String(command))
354
355
def checked_ok(self):
356
"""Bump up the timeout for this client.
357
This should only be called when the client has been seen,
358
alive and well.
359
"""
360
self.last_checked_ok = datetime.datetime.utcnow()
361
gobject.source_remove(self.disable_initiator_tag)
362
self.disable_initiator_tag = (gobject.timeout_add
363
(self.timeout_milliseconds(),
364
self.disable))
365
if self.use_dbus:
366
# Emit D-Bus signal
367
self.PropertyChanged(
368
dbus.String(u"last_checked_ok"),
369
(_datetime_to_dbus(self.last_checked_ok,
370
variant_level=1)))
371
199
else:
200
logger.debug(u"Checker for %(name)s failed",
201
vars(self))
202
self.checker = None
203
self.checker_callback_tag = None
372
204
def start_checker(self):
373
205
"""Start a new checker subprocess if one is not running.
374
206
If a checker already exists, leave it running and do
375
207
nothing."""
376
# The reason for not killing a running checker is that if we
377
# did that, then if a checker (for some reason) started
378
# running slowly and taking more than 'interval' time, the
379
# client would inevitably timeout, since no checker would get
380
# a chance to run to completion. If we instead leave running
381
# checkers alone, the checker would have to take more time
382
# than 'timeout' for the client to be declared invalid, which
383
# is as it should be.
384
385
# If a checker exists, make sure it is not a zombie
386
if self.checker is not None:
387
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
388
if pid:
389
logger.warning("Checker was a zombie")
390
gobject.source_remove(self.checker_callback_tag)
391
self.checker_callback(pid, status,
392
self.current_checker_command)
393
# Start a new checker if needed
394
208
if self.checker is None:
209
logger.debug(u"Starting checker for %s",
210
self.name)
395
211
try:
396
# In case checker_command has exactly one % operator
397
command = self.checker_command % self.host
212
command = self.check_command % self.fqdn
398
213
except TypeError:
399
# Escape attributes for the shell
400
214
escaped_attrs = dict((key, re.escape(str(val)))
401
215
for key, val in
402
216
vars(self).iteritems())
403
217
try:
404
command = self.checker_command % escaped_attrs
218
command = self.check_command % escaped_attrs
405
219
except TypeError, error:
406
logger.error(u'Could not format string "%s":'
407
u' %s', self.checker_command, error)
220
logger.critical(u'Could not format string "%s": %s',
221
self.check_command, error)
408
222
return True # Try again later
409
self.current_checker_command = command
410
223
try:
411
logger.info(u"Starting checker %r for %s",
412
command, self.name)
413
# We don't need to redirect stdout and stderr, since
414
# in normal mode, that is already done by daemon(),
415
# and in debug mode we don't want to. (Stdin is
416
# always replaced by /dev/null.)
417
self.checker = subprocess.Popen(command,
418
close_fds=True,
419
shell=True, cwd="/")
420
if self.use_dbus:
421
# Emit D-Bus signal
422
self.CheckerStarted(command)
423
self.PropertyChanged(
424
dbus.String("checker_running"),
425
dbus.Boolean(True, variant_level=1))
426
self.checker_callback_tag = (gobject.child_watch_add
427
(self.checker.pid,
428
self.checker_callback,
429
data=command))
430
# The checker may have completed before the gobject
431
# watch was added. Check for this.
432
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
433
if pid:
434
gobject.source_remove(self.checker_callback_tag)
435
self.checker_callback(pid, status, command)
436
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:
437
234
logger.error(u"Failed to start subprocess: %s",
438
235
error)
439
236
# Re-run this periodically if run by gobject.timeout_add
440
237
return True
441
442
238
def stop_checker(self):
443
239
"""Force the checker process, if any, to stop."""
444
if self.checker_callback_tag:
445
gobject.source_remove(self.checker_callback_tag)
446
self.checker_callback_tag = None
447
if getattr(self, "checker", None) is None:
240
if not hasattr(self, "checker") or self.checker is None:
448
241
return
449
logger.debug(u"Stopping checker for %(name)s", vars(self))
450
try:
451
os.kill(self.checker.pid, signal.SIGTERM)
452
#os.sleep(0.5)
453
#if self.checker.poll() is None:
454
# os.kill(self.checker.pid, signal.SIGKILL)
455
except OSError, error:
456
if error.errno != errno.ESRCH: # No such process
457
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)
458
247
self.checker = None
459
if self.use_dbus:
460
self.PropertyChanged(dbus.String(u"checker_running"),
461
dbus.Boolean(False, variant_level=1))
462
463
def still_valid(self):
248
def still_valid(self, now=None):
464
249
"""Has the timeout not yet passed for this client?"""
465
if not getattr(self, "enabled", False):
466
return False
467
now = datetime.datetime.utcnow()
468
if self.last_checked_ok is None:
250
if now is None:
251
now = datetime.datetime.now()
252
if self.last_seen is None:
469
253
return now < (self.created + self.timeout)
470
254
else:
471
return now < (self.last_checked_ok + self.timeout)
472
473
## D-Bus methods & signals
474
_interface = u"se.bsnet.fukt.Mandos.Client"
475
476
# CheckedOK - method
477
CheckedOK = dbus.service.method(_interface)(checked_ok)
478
CheckedOK.__name__ = "CheckedOK"
479
480
# CheckerCompleted - signal
481
@dbus.service.signal(_interface, signature="nxs")
482
def CheckerCompleted(self, exitcode, waitstatus, command):
483
"D-Bus signal"
484
pass
485
486
# CheckerStarted - signal
487
@dbus.service.signal(_interface, signature="s")
488
def CheckerStarted(self, command):
489
"D-Bus signal"
490
pass
491
492
# GetAllProperties - method
493
@dbus.service.method(_interface, out_signature="a{sv}")
494
def GetAllProperties(self):
495
"D-Bus method"
496
return dbus.Dictionary({
497
dbus.String("name"):
498
dbus.String(self.name, variant_level=1),
499
dbus.String("fingerprint"):
500
dbus.String(self.fingerprint, variant_level=1),
501
dbus.String("host"):
502
dbus.String(self.host, variant_level=1),
503
dbus.String("created"):
504
_datetime_to_dbus(self.created, variant_level=1),
505
dbus.String("last_enabled"):
506
(_datetime_to_dbus(self.last_enabled,
507
variant_level=1)
508
if self.last_enabled is not None
509
else dbus.Boolean(False, variant_level=1)),
510
dbus.String("enabled"):
511
dbus.Boolean(self.enabled, variant_level=1),
512
dbus.String("last_checked_ok"):
513
(_datetime_to_dbus(self.last_checked_ok,
514
variant_level=1)
515
if self.last_checked_ok is not None
516
else dbus.Boolean (False, variant_level=1)),
517
dbus.String("timeout"):
518
dbus.UInt64(self.timeout_milliseconds(),
519
variant_level=1),
520
dbus.String("interval"):
521
dbus.UInt64(self.interval_milliseconds(),
522
variant_level=1),
523
dbus.String("checker"):
524
dbus.String(self.checker_command,
525
variant_level=1),
526
dbus.String("checker_running"):
527
dbus.Boolean(self.checker is not None,
528
variant_level=1),
529
dbus.String("object_path"):
530
dbus.ObjectPath(self.dbus_object_path,
531
variant_level=1)
532
}, signature="sv")
533
534
# IsStillValid - method
535
IsStillValid = (dbus.service.method(_interface, out_signature="b")
536
(still_valid))
537
IsStillValid.__name__ = "IsStillValid"
538
539
# PropertyChanged - signal
540
@dbus.service.signal(_interface, signature="sv")
541
def PropertyChanged(self, property, value):
542
"D-Bus signal"
543
pass
544
545
# SetChecker - method
546
@dbus.service.method(_interface, in_signature="s")
547
def SetChecker(self, checker):
548
"D-Bus setter method"
549
self.checker_command = checker
550
# Emit D-Bus signal
551
self.PropertyChanged(dbus.String(u"checker"),
552
dbus.String(self.checker_command,
553
variant_level=1))
554
555
# SetHost - method
556
@dbus.service.method(_interface, in_signature="s")
557
def SetHost(self, host):
558
"D-Bus setter method"
559
self.host = host
560
# Emit D-Bus signal
561
self.PropertyChanged(dbus.String(u"host"),
562
dbus.String(self.host, variant_level=1))
563
564
# SetInterval - method
565
@dbus.service.method(_interface, in_signature="t")
566
def SetInterval(self, milliseconds):
567
self.interval = datetime.timedelta(0, 0, 0, milliseconds)
568
# Emit D-Bus signal
569
self.PropertyChanged(dbus.String(u"interval"),
570
(dbus.UInt64(self.interval_milliseconds(),
571
variant_level=1)))
572
573
# SetSecret - method
574
@dbus.service.method(_interface, in_signature="ay",
575
byte_arrays=True)
576
def SetSecret(self, secret):
577
"D-Bus setter method"
578
self.secret = str(secret)
579
580
# SetTimeout - method
581
@dbus.service.method(_interface, in_signature="t")
582
def SetTimeout(self, milliseconds):
583
self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
584
# Emit D-Bus signal
585
self.PropertyChanged(dbus.String(u"timeout"),
586
(dbus.UInt64(self.timeout_milliseconds(),
587
variant_level=1)))
588
589
# Enable - method
590
Enable = dbus.service.method(_interface)(enable)
591
Enable.__name__ = "Enable"
592
593
# StartChecker - method
594
@dbus.service.method(_interface)
595
def StartChecker(self):
596
"D-Bus method"
597
self.start_checker()
598
599
# Disable - method
600
@dbus.service.method(_interface)
601
def Disable(self):
602
"D-Bus method"
603
self.disable()
604
605
# StopChecker - method
606
StopChecker = dbus.service.method(_interface)(stop_checker)
607
StopChecker.__name__ = "StopChecker"
608
609
del _interface
255
return now < (self.last_seen + self.timeout)
610
256
611
257
612
258
def peer_certificate(session):
613
"Return the peer's OpenPGP certificate as a bytestring"
614
259
# If not an OpenPGP certificate...
615
if (gnutls.library.functions
616
.gnutls_certificate_type_get(session._c_object)
617
!= 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:
618
263
# ...do the normal thing
619
264
return session.peer_certificate
620
list_size = ctypes.c_uint(1)
621
cert_list = (gnutls.library.functions
622
.gnutls_certificate_get_peers
623
(session._c_object, ctypes.byref(list_size)))
624
if not bool(cert_list) and list_size.value != 0:
625
raise gnutls.errors.GNUTLSError("error getting peer"
626
" certificate")
265
list_size = ctypes.c_uint()
266
cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
267
(session._c_object, ctypes.byref(list_size))
627
268
if list_size.value == 0:
628
269
return None
629
270
cert = cert_list[0]
631
272
632
273
633
274
def fingerprint(openpgp):
634
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
635
# New GnuTLS "datum" with the OpenPGP public key
636
datum = (gnutls.library.types
637
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
638
ctypes.POINTER
639
(ctypes.c_ubyte)),
640
ctypes.c_uint(len(openpgp))))
641
275
# New empty GnuTLS certificate
642
276
crt = gnutls.library.types.gnutls_openpgp_crt_t()
643
(gnutls.library.functions
644
.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)))
645
284
# Import the OpenPGP public key into the certificate
646
(gnutls.library.functions
647
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
648
gnutls.library.constants
649
.GNUTLS_OPENPGP_FMT_RAW))
650
# Verify the self signature in the key
651
crtverify = ctypes.c_uint()
652
(gnutls.library.functions
653
.gnutls_openpgp_crt_verify_self(crt, 0, ctypes.byref(crtverify)))
654
if crtverify.value != 0:
655
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
656
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)
657
289
# New buffer for the fingerprint
658
buf = ctypes.create_string_buffer(20)
659
buf_len = ctypes.c_size_t()
290
buffer = ctypes.create_string_buffer(20)
291
buffer_length = ctypes.c_size_t()
660
292
# Get the fingerprint from the certificate into the buffer
661
(gnutls.library.functions
662
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
663
ctypes.byref(buf_len)))
293
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
294
(crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
664
295
# Deinit the certificate
665
296
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
666
297
# Convert the buffer to a Python bytestring
667
fpr = ctypes.string_at(buf, buf_len.value)
298
fpr = ctypes.string_at(buffer, buffer_length.value)
668
299
# Convert the bytestring to hexadecimal notation
669
300
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
670
301
return hex_fpr
671
302
672
303
673
class TCP_handler(SocketServer.BaseRequestHandler, object):
304
class tcp_handler(SocketServer.BaseRequestHandler, object):
674
305
"""A TCP request handler class.
675
306
Instantiated by IPv6_TCPServer for each request to handle it.
676
307
Note: This will run in its own forked process."""
677
308
678
309
def handle(self):
679
logger.info(u"TCP connection from: %s",
680
unicode(self.client_address))
681
logger.debug(u"Pipe: %d", self.server.pipe[1])
682
# Open IPC pipe to parent process
683
with closing(os.fdopen(self.server.pipe[1], "w", 1)) as ipc:
684
session = (gnutls.connection
685
.ClientSession(self.request,
686
gnutls.connection
687
.X509Credentials()))
688
689
line = self.request.makefile().readline()
690
logger.debug(u"Protocol version: %r", line)
691
try:
692
if int(line.strip().split()[0]) > 1:
693
raise RuntimeError
694
except (ValueError, IndexError, RuntimeError), error:
695
logger.error(u"Unknown protocol version: %s", error)
696
return
697
698
# Note: gnutls.connection.X509Credentials is really a
699
# generic GnuTLS certificate credentials object so long as
700
# no X.509 keys are added to it. Therefore, we can use it
701
# here despite using OpenPGP certificates.
702
703
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
704
# "+AES-256-CBC", "+SHA1",
705
# "+COMP-NULL", "+CTYPE-OPENPGP",
706
# "+DHE-DSS"))
707
# Use a fallback default, since this MUST be set.
708
priority = self.server.settings.get("priority", "NORMAL")
709
(gnutls.library.functions
710
.gnutls_priority_set_direct(session._c_object,
711
priority, None))
712
713
try:
714
session.handshake()
715
except gnutls.errors.GNUTLSError, error:
716
logger.warning(u"Handshake failed: %s", error)
717
# Do not run session.bye() here: the session is not
718
# established. Just abandon the request.
719
return
720
logger.debug(u"Handshake succeeded")
721
try:
722
fpr = fingerprint(peer_certificate(session))
723
except (TypeError, gnutls.errors.GNUTLSError), error:
724
logger.warning(u"Bad certificate: %s", error)
725
session.bye()
726
return
727
logger.debug(u"Fingerprint: %s", fpr)
728
729
for c in self.server.clients:
730
if c.fingerprint == fpr:
731
client = c
732
break
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())
315
316
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
317
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
318
# "+DHE-DSS"))
319
priority = "SECURE256"
320
321
gnutls.library.functions.gnutls_priority_set_direct\
322
(session._c_object, priority, None);
323
324
try:
325
session.handshake()
326
except gnutls.errors.GNUTLSError, error:
327
logger.debug(u"Handshake failed: %s", error)
328
# Do not run session.bye() here: the session is not
329
# established. Just abandon the request.
330
return
331
try:
332
fpr = fingerprint(peer_certificate(session))
333
except (TypeError, gnutls.errors.GNUTLSError), error:
334
logger.debug(u"Bad certificate: %s", error)
335
session.bye()
336
return
337
logger.debug(u"Fingerprint: %s", fpr)
338
client = None
339
for c in clients:
340
if c.fingerprint == fpr:
341
client = c
342
break
343
# Have to check if client.still_valid(), since it is possible
344
# that the client timed out while establishing the GnuTLS
345
# session.
346
if (not client) or (not client.still_valid()):
347
if client:
348
logger.debug(u"Client %(name)s is invalid",
349
vars(client))
733
350
else:
734
logger.warning(u"Client not found for fingerprint: %s",
735
fpr)
736
ipc.write("NOTFOUND %s\n" % fpr)
737
session.bye()
738
return
739
# Have to check if client.still_valid(), since it is
740
# possible that the client timed out while establishing
741
# the GnuTLS session.
742
if not client.still_valid():
743
logger.warning(u"Client %(name)s is invalid",
744
vars(client))
745
ipc.write("INVALID %s\n" % client.name)
746
session.bye()
747
return
748
ipc.write("SENDING %s\n" % client.name)
749
sent_size = 0
750
while sent_size < len(client.secret):
751
sent = session.send(client.secret[sent_size:])
752
logger.debug(u"Sent: %d, remaining: %d",
753
sent, len(client.secret)
754
- (sent_size + sent))
755
sent_size += sent
351
logger.debug(u"Client not found for fingerprint: %s",
352
fpr)
756
353
session.bye()
757
758
759
class ForkingMixInWithPipe(SocketServer.ForkingMixIn, object):
760
"""Like SocketServer.ForkingMixIn, but also pass a pipe.
761
Assumes a gobject.MainLoop event loop.
762
"""
763
def process_request(self, request, client_address):
764
"""This overrides and wraps the original process_request().
765
This function creates a new pipe in self.pipe
766
"""
767
self.pipe = os.pipe()
768
super(ForkingMixInWithPipe,
769
self).process_request(request, client_address)
770
os.close(self.pipe[1]) # close write end
771
# Call "handle_ipc" for both data and EOF events
772
gobject.io_add_watch(self.pipe[0],
773
gobject.IO_IN | gobject.IO_HUP,
774
self.handle_ipc)
775
def handle_ipc(source, condition):
776
"""Dummy function; override as necessary"""
777
os.close(source)
778
return False
779
780
781
class IPv6_TCPServer(ForkingMixInWithPipe,
782
SocketServer.TCPServer, object):
783
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
354
return
355
sent_size = 0
356
while sent_size < len(client.secret):
357
sent = session.send(client.secret[sent_size:])
358
logger.debug(u"Sent: %d, remaining: %d",
359
sent, len(client.secret)
360
- (sent_size + sent))
361
sent_size += sent
362
session.bye()
363
364
365
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
366
"""IPv6 TCP server. Accepts 'None' as address and/or port.
784
367
Attributes:
785
settings: Server settings
368
options: Command line options
786
369
clients: Set() of Client objects
787
enabled: Boolean; whether this server is activated yet
788
370
"""
789
371
address_family = socket.AF_INET6
790
372
def __init__(self, *args, **kwargs):
791
if "settings" in kwargs:
792
self.settings = kwargs["settings"]
793
del kwargs["settings"]
373
if "options" in kwargs:
374
self.options = kwargs["options"]
375
del kwargs["options"]
794
376
if "clients" in kwargs:
795
377
self.clients = kwargs["clients"]
796
378
del kwargs["clients"]
797
if "use_ipv6" in kwargs:
798
if not kwargs["use_ipv6"]:
799
self.address_family = socket.AF_INET
800
del kwargs["use_ipv6"]
801
self.enabled = False
802
super(IPv6_TCPServer, self).__init__(*args, **kwargs)
379
return super(type(self), self).__init__(*args, **kwargs)
803
380
def server_bind(self):
804
381
"""This overrides the normal server_bind() function
805
382
to bind to an interface if one was specified, and also NOT to
806
383
bind to an address or port if they were not specified."""
807
if self.settings["interface"]:
808
# 25 is from /usr/include/asm-i486/socket.h
809
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
810
388
try:
811
389
self.socket.setsockopt(socket.SOL_SOCKET,
812
SO_BINDTODEVICE,
813
self.settings["interface"])
390
socket.SO_BINDTODEVICE,
391
self.options.interface)
814
392
except socket.error, error:
815
393
if error[0] == errno.EPERM:
816
logger.error(u"No permission to"
817
u" bind to interface %s",
818
self.settings["interface"])
394
logger.warning(u"No permission to"
395
u" bind to interface %s",
396
self.options.interface)
819
397
else:
820
raise
398
raise error
821
399
# Only bind(2) the socket if we really need to.
822
400
if self.server_address[0] or self.server_address[1]:
823
401
if not self.server_address[0]:
824
if self.address_family == socket.AF_INET6:
825
any_address = "::" # in6addr_any
826
else:
827
any_address = socket.INADDR_ANY
828
self.server_address = (any_address,
402
in6addr_any = "::"
403
self.server_address = (in6addr_any,
829
404
self.server_address[1])
830
elif not self.server_address[1]:
405
elif self.server_address[1] is None:
831
406
self.server_address = (self.server_address[0],
832
407
0)
833
# if self.settings["interface"]:
834
# self.server_address = (self.server_address[0],
835
# 0, # port
836
# 0, # flowinfo
837
# if_nametoindex
838
# (self.settings
839
# ["interface"]))
840
return super(IPv6_TCPServer, self).server_bind()
841
def server_activate(self):
842
if self.enabled:
843
return super(IPv6_TCPServer, self).server_activate()
844
def enable(self):
845
self.enabled = True
846
def handle_ipc(self, source, condition, file_objects={}):
847
logger.debug("Handling IPC: %r : %r", source, condition)
848
849
# Turn a file descriptor into a Python file object
850
if source not in file_objects:
851
file_objects[source] = os.fdopen(source, "r", 1)
852
853
# Read a line from the file object
854
cmdline = file_objects[source].readline()
855
if not cmdline: # Empty line means end of file
856
# close the IPC pipe
857
logger.debug("Closing: %r", source)
858
file_objects[source].close()
859
del file_objects[source]
860
861
# Stop calling this function
862
return False
863
864
logger.debug("IPC command: %r\n" % cmdline)
865
866
# Parse and act on command
867
cmd, args = cmdline.split(None, 1)
868
if cmd == "NOTFOUND":
869
pass # xxx
870
elif cmd == "INVALID":
871
pass # xxx
872
elif cmd == "SENDING":
873
pass # xxx
874
# client.checked_ok()
875
else:
876
logger.error("Unknown IPC command: %r", cmdline)
877
878
# Keep calling this function
879
return True
408
return super(type(self), self).server_bind()
880
409
881
410
882
411
def string_to_delta(interval):
883
412
"""Parse a string and return a datetime.timedelta
884
413
885
414
>>> string_to_delta('7d')
886
415
datetime.timedelta(7)
887
416
>>> string_to_delta('60s')
892
421
datetime.timedelta(1)
893
422
>>> string_to_delta(u'1w')
894
423
datetime.timedelta(7)
895
>>> string_to_delta('5m 30s')
896
datetime.timedelta(0, 330)
897
424
"""
898
timevalue = datetime.timedelta(0)
899
for s in interval.split():
900
try:
901
suffix = unicode(s[-1])
902
value = int(s[:-1])
903
if suffix == u"d":
904
delta = datetime.timedelta(value)
905
elif suffix == u"s":
906
delta = datetime.timedelta(0, value)
907
elif suffix == u"m":
908
delta = datetime.timedelta(0, 0, 0, 0, value)
909
elif suffix == u"h":
910
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
911
elif suffix == u"w":
912
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
913
else:
914
raise ValueError
915
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:
916
439
raise ValueError
917
timevalue += delta
918
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()
919
476
920
477
921
478
def server_state_changed(state):
922
"""Derived from the Avahi example code"""
479
"""From the Avahi server example code"""
923
480
if state == avahi.SERVER_COLLISION:
924
logger.error(u"Zeroconf server name collision")
925
service.remove()
481
logger.warning(u"Server name collision")
482
remove_service()
926
483
elif state == avahi.SERVER_RUNNING:
927
service.add()
484
add_service()
928
485
929
486
930
487
def entry_group_state_changed(state, error):
931
"""Derived from the Avahi example code"""
932
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)
933
492
934
493
if state == avahi.ENTRY_GROUP_ESTABLISHED:
935
logger.debug(u"Zeroconf service established.")
494
logger.debug(u"Service established.")
936
495
elif state == avahi.ENTRY_GROUP_COLLISION:
937
logger.warning(u"Zeroconf service name collision.")
938
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()
939
510
elif state == avahi.ENTRY_GROUP_FAILURE:
940
logger.critical(u"Avahi: Error in group state changed %s",
941
unicode(error))
942
raise AvahiGroupError(u"State changed: %s" % unicode(error))
511
logger.error(u"Error in group state changed %s",
512
unicode(error))
513
main_loop.quit()
514
return
515
943
516
944
517
def if_nametoindex(interface):
945
"""Call the C function if_nametoindex(), or equivalent"""
946
global if_nametoindex
518
"""Call the C function if_nametoindex()"""
947
519
try:
948
if_nametoindex = (ctypes.cdll.LoadLibrary
949
(ctypes.util.find_library("c"))
950
.if_nametoindex)
520
libc = ctypes.cdll.LoadLibrary("libc.so.6")
521
return libc.if_nametoindex(interface)
951
522
except (OSError, AttributeError):
952
523
if "struct" not in sys.modules:
953
524
import struct
954
525
if "fcntl" not in sys.modules:
955
526
import fcntl
956
def if_nametoindex(interface):
957
"Get an interface index the hard way, i.e. using fcntl()"
958
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
959
with closing(socket.socket()) as s:
960
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
961
struct.pack("16s16x", interface))
962
interface_index = struct.unpack("I", ifreq[16:20])[0]
963
return interface_index
964
return if_nametoindex(interface)
965
966
967
def daemon(nochdir = False, noclose = False):
968
"""See daemon(3). Standard BSD Unix function.
969
This should really exist as os.daemon, but it doesn't (yet)."""
970
if os.fork():
971
sys.exit()
972
os.setsid()
973
if not nochdir:
974
os.chdir("/")
975
if os.fork():
976
sys.exit()
977
if not noclose:
978
# Close all standard open file descriptors
979
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
980
if not stat.S_ISCHR(os.fstat(null).st_mode):
981
raise OSError(errno.ENODEV,
982
"/dev/null not a character device")
983
os.dup2(null, sys.stdin.fileno())
984
os.dup2(null, sys.stdout.fileno())
985
os.dup2(null, sys.stderr.fileno())
986
if null > 2:
987
os.close(null)
988
989
990
def main():
991
parser = optparse.OptionParser(version = "%%prog %s" % version)
527
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
528
s = socket.socket()
529
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
530
struct.pack("16s16x", interface))
531
s.close()
532
interface_index = struct.unpack("I", ifreq[16:20])[0]
533
return interface_index
534
535
536
if __name__ == '__main__':
537
parser = OptionParser()
992
538
parser.add_option("-i", "--interface", type="string",
993
metavar="IF", help="Bind to interface IF")
994
parser.add_option("-a", "--address", type="string",
995
help="Address to listen for requests on")
996
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,
997
554
help="Port number to receive requests on")
998
parser.add_option("--check", action="store_true",
555
parser.add_option("--timeout", type="string", # Parsed later
556
default="1h",
557
help="Amount of downtime allowed for clients")
558
parser.add_option("--interval", type="string", # Parsed later
559
default="5m",
560
help="How often to check that a client is up")
561
parser.add_option("--check", action="store_true", default=False,
999
562
help="Run self-test")
1000
parser.add_option("--debug", action="store_true",
1001
help="Debug mode; run in foreground and log to"
1002
" terminal")
1003
parser.add_option("--priority", type="string", help="GnuTLS"
1004
" priority string (see GnuTLS documentation)")
1005
parser.add_option("--servicename", type="string", metavar="NAME",
1006
help="Zeroconf service name")
1007
parser.add_option("--configdir", type="string",
1008
default="/etc/mandos", metavar="DIR",
1009
help="Directory to search for configuration"
1010
" files")
1011
parser.add_option("--no-dbus", action="store_false",
1012
dest="use_dbus",
1013
help="Do not provide D-Bus system bus"
1014
" interface")
1015
parser.add_option("--no-ipv6", action="store_false",
1016
dest="use_ipv6", help="Do not use IPv6")
1017
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()
1018
566
1019
567
if options.check:
1020
568
import doctest
1021
569
doctest.testmod()
1022
570
sys.exit()
1023
571
1024
# Default values for config file for server-global settings
1025
server_defaults = { "interface": "",
1026
"address": "",
1027
"port": "",
1028
"debug": "False",
1029
"priority":
1030
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1031
"servicename": "Mandos",
1032
"use_dbus": "True",
1033
"use_ipv6": "True",
1034
}
1035
1036
# Parse config file for server-global settings
1037
server_config = ConfigParser.SafeConfigParser(server_defaults)
1038
del server_defaults
1039
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1040
# Convert the SafeConfigParser object to a dict
1041
server_settings = server_config.defaults()
1042
# Use the appropriate methods on the non-string config options
1043
server_settings["debug"] = server_config.getboolean("DEFAULT",
1044
"debug")
1045
server_settings["use_dbus"] = server_config.getboolean("DEFAULT",
1046
"use_dbus")
1047
server_settings["use_ipv6"] = server_config.getboolean("DEFAULT",
1048
"use_ipv6")
1049
if server_settings["port"]:
1050
server_settings["port"] = server_config.getint("DEFAULT",
1051
"port")
1052
del server_config
1053
1054
# Override the settings from the config file with command line
1055
# options, if set.
1056
for option in ("interface", "address", "port", "debug",
1057
"priority", "servicename", "configdir",
1058
"use_dbus", "use_ipv6"):
1059
value = getattr(options, option)
1060
if value is not None:
1061
server_settings[option] = value
1062
del options
1063
# Now we have our good server settings in "server_settings"
1064
1065
# For convenience
1066
debug = server_settings["debug"]
1067
use_dbus = server_settings["use_dbus"]
1068
use_ipv6 = server_settings["use_ipv6"]
1069
1070
if not debug:
1071
syslogger.setLevel(logging.WARNING)
1072
console.setLevel(logging.WARNING)
1073
1074
if server_settings["servicename"] != "Mandos":
1075
syslogger.setFormatter(logging.Formatter
1076
('Mandos (%s): %%(levelname)s:'
1077
' %%(message)s'
1078
% server_settings["servicename"]))
1079
1080
# Parse config file with clients
1081
client_defaults = { "timeout": "1h",
1082
"interval": "5m",
1083
"checker": "fping -q -- %%(host)s",
1084
"host": "",
1085
}
1086
client_config = ConfigParser.SafeConfigParser(client_defaults)
1087
client_config.read(os.path.join(server_settings["configdir"],
1088
"clients.conf"))
1089
1090
clients = Set()
1091
tcp_server = IPv6_TCPServer((server_settings["address"],
1092
server_settings["port"]),
1093
TCP_handler,
1094
settings=server_settings,
1095
clients=clients, use_ipv6=use_ipv6)
1096
pidfilename = "/var/run/mandos.pid"
1097
try:
1098
pidfile = open(pidfilename, "w")
1099
except IOError:
1100
logger.error("Could not open file %r", pidfilename)
1101
1102
try:
1103
uid = pwd.getpwnam("_mandos").pw_uid
1104
gid = pwd.getpwnam("_mandos").pw_gid
1105
except KeyError:
1106
try:
1107
uid = pwd.getpwnam("mandos").pw_uid
1108
gid = pwd.getpwnam("mandos").pw_gid
1109
except KeyError:
1110
try:
1111
uid = pwd.getpwnam("nobody").pw_uid
1112
gid = pwd.getpwnam("nogroup").pw_gid
1113
except KeyError:
1114
uid = 65534
1115
gid = 65534
1116
try:
1117
os.setgid(gid)
1118
os.setuid(uid)
1119
except OSError, error:
1120
if error[0] != errno.EPERM:
1121
raise error
1122
1123
# Enable all possible GnuTLS debugging
1124
if debug:
1125
# "Use a log level over 10 to enable all debugging options."
1126
# - GnuTLS manual
1127
gnutls.library.functions.gnutls_global_set_log_level(11)
1128
1129
@gnutls.library.types.gnutls_log_func
1130
def debug_gnutls(level, string):
1131
logger.debug("GnuTLS: %s", string[:-1])
1132
1133
(gnutls.library.functions
1134
.gnutls_global_set_log_function(debug_gnutls))
1135
1136
global service
1137
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1138
service = AvahiService(name = server_settings["servicename"],
1139
servicetype = "_mandos._tcp",
1140
protocol = protocol)
1141
if server_settings["interface"]:
1142
service.interface = (if_nametoindex
1143
(server_settings["interface"]))
1144
1145
global main_loop
1146
global bus
1147
global server
1148
# 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
1149
589
DBusGMainLoop(set_as_default=True )
1150
590
main_loop = gobject.MainLoop()
1151
591
bus = dbus.SystemBus()
1152
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
1153
avahi.DBUS_PATH_SERVER),
1154
avahi.DBUS_INTERFACE_SERVER)
592
server = dbus.Interface(
593
bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
594
avahi.DBUS_INTERFACE_SERVER )
1155
595
# End of Avahi example code
1156
if use_dbus:
1157
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
1158
1159
clients.update(Set(Client(name = section,
1160
config
1161
= dict(client_config.items(section)),
1162
use_dbus = use_dbus)
596
597
debug = options.debug
598
599
clients = Set()
600
def remove_from_clients(client):
601
clients.remove(client)
602
if not clients:
603
logger.debug(u"No clients left, exiting")
604
main_loop.quit()
605
606
clients.update(Set(Client(name=section, options=options,
607
stop_hook = remove_from_clients,
608
**(dict(client_config\
609
.items(section))))
1163
610
for section in client_config.sections()))
1164
if not clients:
1165
logger.warning(u"No clients defined")
1166
1167
if debug:
1168
# Redirect stdin so all checkers get /dev/null
1169
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1170
os.dup2(null, sys.stdin.fileno())
1171
if null > 2:
1172
os.close(null)
1173
else:
1174
# No console logging
1175
logger.removeHandler(console)
1176
# Close all input and output, do double fork, etc.
1177
daemon()
1178
1179
try:
1180
pid = os.getpid()
1181
pidfile.write(str(pid) + "\n")
1182
pidfile.close()
1183
del pidfile
1184
except IOError:
1185
logger.error(u"Could not write to file %r with PID %d",
1186
pidfilename, pid)
1187
except NameError:
1188
# "pidfile" was never created
1189
pass
1190
del pidfilename
1191
1192
def cleanup():
1193
"Cleanup function; run on exit"
1194
global group
1195
# From the Avahi example code
1196
if not group is None:
1197
group.Free()
1198
group = None
1199
# End of Avahi example code
1200
1201
while clients:
1202
client = clients.pop()
1203
client.disable_hook = None
1204
client.disable()
1205
1206
atexit.register(cleanup)
1207
1208
if not debug:
1209
signal.signal(signal.SIGINT, signal.SIG_IGN)
1210
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1211
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1212
1213
if use_dbus:
1214
class MandosServer(dbus.service.Object):
1215
"""A D-Bus proxy object"""
1216
def __init__(self):
1217
dbus.service.Object.__init__(self, bus, "/")
1218
_interface = u"se.bsnet.fukt.Mandos"
1219
1220
@dbus.service.signal(_interface, signature="oa{sv}")
1221
def ClientAdded(self, objpath, properties):
1222
"D-Bus signal"
1223
pass
1224
1225
@dbus.service.signal(_interface, signature="os")
1226
def ClientRemoved(self, objpath, name):
1227
"D-Bus signal"
1228
pass
1229
1230
@dbus.service.method(_interface, out_signature="ao")
1231
def GetAllClients(self):
1232
"D-Bus method"
1233
return dbus.Array(c.dbus_object_path for c in clients)
1234
1235
@dbus.service.method(_interface, out_signature="a{oa{sv}}")
1236
def GetAllClientsWithProperties(self):
1237
"D-Bus method"
1238
return dbus.Dictionary(
1239
((c.dbus_object_path, c.GetAllProperties())
1240
for c in clients),
1241
signature="oa{sv}")
1242
1243
@dbus.service.method(_interface, in_signature="o")
1244
def RemoveClient(self, object_path):
1245
"D-Bus method"
1246
for c in clients:
1247
if c.dbus_object_path == object_path:
1248
clients.remove(c)
1249
# Don't signal anything except ClientRemoved
1250
c.use_dbus = False
1251
c.disable()
1252
# Emit D-Bus signal
1253
self.ClientRemoved(object_path, c.name)
1254
return
1255
raise KeyError
1256
1257
del _interface
1258
1259
mandos_server = MandosServer()
1260
1261
611
for client in clients:
1262
if use_dbus:
1263
# Emit D-Bus signal
1264
mandos_server.ClientAdded(client.dbus_object_path,
1265
client.GetAllProperties())
1266
client.enable()
1267
1268
tcp_server.enable()
1269
tcp_server.server_activate()
1270
1271
# Find out what port we got
1272
service.port = tcp_server.socket.getsockname()[1]
1273
if use_ipv6:
1274
logger.info(u"Now listening on address %r, port %d,"
1275
" flowinfo %d, scope_id %d"
1276
% tcp_server.socket.getsockname())
1277
else: # IPv4
1278
logger.info(u"Now listening on address %r, port %d"
1279
% tcp_server.socket.getsockname())
1280
1281
#service.interface = tcp_server.socket.getsockname()[3]
1282
612
client.start()
613
614
tcp_server = IPv6_TCPServer((None, options.port),
615
tcp_handler,
616
options=options,
617
clients=clients)
618
# Find out what random port we got
619
servicePort = tcp_server.socket.getsockname()[1]
620
logger.debug(u"Now listening on port %d", servicePort)
621
622
if options.interface is not None:
623
serviceInterface = if_nametoindex(options.interface)
624
625
# From the Avahi server example code
626
server.connect_to_signal("StateChanged", server_state_changed)
627
server_state_changed(server.GetState())
628
# End of Avahi example code
629
630
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
631
lambda *args, **kwargs:
632
tcp_server.handle_request(*args[2:],
633
**kwargs) or True)
1283
634
try:
1284
# From the Avahi example code
1285
server.connect_to_signal("StateChanged", server_state_changed)
1286
try:
1287
server_state_changed(server.GetState())
1288
except dbus.exceptions.DBusException, error:
1289
logger.critical(u"DBusException: %s", error)
1290
sys.exit(1)
1291
# End of Avahi example code
1292
1293
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
1294
lambda *args, **kwargs:
1295
(tcp_server.handle_request
1296
(*args[2:], **kwargs) or True))
1297
1298
logger.debug(u"Starting main loop")
1299
635
main_loop.run()
1300
except AvahiError, error:
1301
logger.critical(u"AvahiError: %s", error)
1302
sys.exit(1)
1303
636
except KeyboardInterrupt:
1304
if debug:
1305
print >> sys.stderr
1306
logger.debug("Server received KeyboardInterrupt")
1307
logger.debug("Server exiting")
637
print
638
639
# Cleanup here
1308
640
1309
if __name__ == '__main__':
1310
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