To get this branch, use:
bzr branch
http://bzr.recompile.se/loggerhead/mandos/trunk
« back to all changes in this revision
Viewing changes to mandos
- browse files at revision 183
- compare with another revision
- download diff
- download tarball
- view history from revision 183
- Committer: Teddy Hogeborn
- Date: 2008-09-13 15:36:18 UTC
- Revision ID: teddy@fukt.bsnet.se-20080913153618-atp386q2bqj0ku99
* Makefile (install-client-nokey): Do "&&" instead of ";" to catch
errors.
* README: Kill the straight quotes. Add copyright notice.
* overview.xml: Improved wording.
errors.
* README: Kill the straight quotes. Add copyright notice.
* overview.xml: Improved wording.
- files added:
- .bzrignore
- files removed:
- ca.pem
- files renamed:
- mandos-clients.conf => clients.conf
- server.py => mandos
- plugbasedclient.c => plugin-runner.c
- plugins.d/mandosclient.c => plugins.d/mandos-client.c
- plugins.d/passprompt.c => plugins.d/password-prompt.c
- files modified:
- Makefile
added
removed
mandos
1
1
#!/usr/bin/python
2
# -*- 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 © 2007-2008 Teddy Hogeborn & Björn Påhlsson
15
#
16
# This program is free software: you can redistribute it and/or modify
17
# it under the terms of the GNU General Public License as published by
18
# the Free Software Foundation, either version 3 of the License, or
19
# (at your option) any later version.
20
#
21
# This program is distributed in the hope that it will be useful,
22
# but WITHOUT ANY WARRANTY; without even the implied warranty of
23
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
24
# GNU General Public License for more details.
25
#
26
# You should have received a copy of the GNU General Public License
27
# along with this program. If not, see
28
# <http://www.gnu.org/licenses/>.
29
#
30
# Contact the authors at <mandos@fukt.bsnet.se>.
31
#
2
32
3
33
from __future__ import division
4
34
21
51
import signal
22
52
from sets import Set
23
53
import subprocess
54
import atexit
55
import stat
56
import logging
57
import logging.handlers
58
import pwd
24
59
25
60
import dbus
26
61
import gobject
28
63
from dbus.mainloop.glib import DBusGMainLoop
29
64
import ctypes
30
65
31
import logging
32
import logging.handlers
33
34
# logghandler.setFormatter(logging.Formatter('%(levelname)s %(message)s')
66
version = "1.0"
35
67
36
68
logger = logging.Logger('mandos')
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
69
syslogger = logging.handlers.SysLogHandler\
70
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
71
address = "/dev/log")
72
syslogger.setFormatter(logging.Formatter\
73
('Mandos: %(levelname)s: %(message)s'))
74
logger.addHandler(syslogger)
75
76
console = logging.StreamHandler()
77
console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
78
' %(message)s'))
79
logger.addHandler(console)
80
81
class AvahiError(Exception):
82
def __init__(self, value):
83
self.value = value
84
def __str__(self):
85
return repr(self.value)
86
87
class AvahiServiceError(AvahiError):
88
pass
89
90
class AvahiGroupError(AvahiError):
91
pass
92
93
94
class AvahiService(object):
95
"""An Avahi (Zeroconf) service.
96
Attributes:
97
interface: integer; avahi.IF_UNSPEC or an interface index.
98
Used to optionally bind to the specified interface.
99
name: string; Example: 'Mandos'
100
type: string; Example: '_mandos._tcp'.
101
See <http://www.dns-sd.org/ServiceTypes.html>
102
port: integer; what port to announce
103
TXT: list of strings; TXT record for the service
104
domain: string; Domain to publish on, default to .local if empty.
105
host: string; Host to publish records for, default is localhost
106
max_renames: integer; maximum number of renames
107
rename_count: integer; counter so we only rename after collisions
108
a sensible number of times
109
"""
110
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
111
type = None, port = None, TXT = None, domain = "",
112
host = "", max_renames = 32768):
113
self.interface = interface
114
self.name = name
115
self.type = type
116
self.port = port
117
if TXT is None:
118
self.TXT = []
119
else:
120
self.TXT = TXT
121
self.domain = domain
122
self.host = host
123
self.rename_count = 0
124
self.max_renames = max_renames
125
def rename(self):
126
"""Derived from the Avahi example code"""
127
if self.rename_count >= self.max_renames:
128
logger.critical(u"No suitable Zeroconf service name found"
129
u" after %i retries, exiting.",
130
rename_count)
131
raise AvahiServiceError("Too many renames")
132
self.name = server.GetAlternativeServiceName(self.name)
133
logger.info(u"Changing Zeroconf service name to %r ...",
134
str(self.name))
135
syslogger.setFormatter(logging.Formatter\
136
('Mandos (%s): %%(levelname)s:'
137
' %%(message)s' % self.name))
138
self.remove()
139
self.add()
140
self.rename_count += 1
141
def remove(self):
142
"""Derived from the Avahi example code"""
143
if group is not None:
144
group.Reset()
145
def add(self):
146
"""Derived from the Avahi example code"""
147
global group
148
if group is None:
149
group = dbus.Interface\
150
(bus.get_object(avahi.DBUS_NAME,
151
server.EntryGroupNew()),
152
avahi.DBUS_INTERFACE_ENTRY_GROUP)
153
group.connect_to_signal('StateChanged',
154
entry_group_state_changed)
155
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
156
service.name, service.type)
157
group.AddService(
158
self.interface, # interface
159
avahi.PROTO_INET6, # protocol
160
dbus.UInt32(0), # flags
161
self.name, self.type,
162
self.domain, self.host,
163
dbus.UInt16(self.port),
164
avahi.string_array_to_txt_array(self.TXT))
165
group.Commit()
166
167
# From the Avahi example code:
168
group = None # our entry group
53
169
# End of Avahi example code
54
170
55
171
60
176
fingerprint: string (40 or 32 hexadecimal digits); used to
61
177
uniquely identify the client
62
178
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
179
host: string; available for use by the checker command
180
created: datetime.datetime(); object creation, not client host
181
last_checked_ok: datetime.datetime() or None if not yet checked OK
182
timeout: datetime.timedelta(); How long from last_checked_ok
183
until this client is invalid
68
184
interval: datetime.timedelta(); How often to start a new checker
69
185
stop_hook: If set, called by stop() as stop_hook(self)
70
186
checker: subprocess.Popen(); a running checker process used
71
187
to see if the client lives.
72
Is None if no process is running.
188
'None' if no process is running.
73
189
checker_initiator_tag: a gobject event source tag, or None
74
190
stop_initiator_tag: - '' -
75
191
checker_callback_tag: - '' -
76
192
checker_command: string; External command which is run to check if
77
client lives. %()s expansions are done at
193
client lives. %() expansions are done at
78
194
runtime with vars(self) as dict, so that for
79
195
instance %(name)s can be used in the command.
80
196
Private attibutes:
81
197
_timeout: Real variable for 'timeout'
82
198
_interval: Real variable for 'interval'
83
_timeout_milliseconds: Used by gobject.timeout_add()
199
_timeout_milliseconds: Used when calling gobject.timeout_add()
84
200
_interval_milliseconds: - '' -
85
201
"""
86
202
def _set_timeout(self, timeout):
106
222
interval = property(lambda self: self._interval,
107
223
_set_interval)
108
224
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):
225
def __init__(self, name = None, stop_hook=None, config={}):
226
"""Note: the 'checker' key in 'config' sets the
227
'checker_command' attribute and *not* the 'checker'
228
attribute."""
112
229
self.name = name
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)
230
logger.debug(u"Creating client %r", self.name)
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
sf = open(config["secfile"])
121
241
self.secret = sf.read()
122
242
sf.close()
123
243
else:
124
raise RuntimeError(u"No secret or secfile for client %s"
125
% self.name)
126
self.fqdn = fqdn # string
244
raise TypeError(u"No secret or secfile for client %s"
245
% self.name)
246
self.host = config.get("host", "")
127
247
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
248
self.last_checked_ok = None
249
self.timeout = string_to_delta(config["timeout"])
250
self.interval = string_to_delta(config["interval"])
137
251
self.stop_hook = stop_hook
138
252
self.checker = None
139
253
self.checker_initiator_tag = None
140
254
self.stop_initiator_tag = None
141
255
self.checker_callback_tag = None
142
self.check_command = checker
256
self.check_command = config["checker"]
143
257
def start(self):
144
"""Start this clients checker and timeout hooks"""
258
"""Start this client's checker and timeout hooks"""
145
259
# Schedule a new checker to be started an 'interval' from now,
146
260
# and every interval from then on.
147
261
self.checker_initiator_tag = gobject.timeout_add\
155
269
self.stop)
156
270
def stop(self):
157
271
"""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:
272
The possibility that a client might be restarted is left open,
273
but not currently used."""
274
# If this client doesn't have a secret, it is already stopped.
275
if hasattr(self, "secret") and self.secret:
276
logger.info(u"Stopping client %s", self.name)
277
self.secret = None
278
else:
279
return False
280
if getattr(self, "stop_initiator_tag", False):
163
281
gobject.source_remove(self.stop_initiator_tag)
164
282
self.stop_initiator_tag = None
165
if self.checker_initiator_tag:
283
if getattr(self, "checker_initiator_tag", False):
166
284
gobject.source_remove(self.checker_initiator_tag)
167
285
self.checker_initiator_tag = None
168
286
self.stop_checker()
171
289
# Do not run this again if called by a gobject.timeout_add
172
290
return False
173
291
def __del__(self):
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()
292
self.stop_hook = None
293
self.stop()
184
294
def checker_callback(self, pid, condition):
185
295
"""The checker has completed, so take appropriate actions."""
186
296
now = datetime.datetime.now()
297
self.checker_callback_tag = None
298
self.checker = None
187
299
if os.WIFEXITED(condition) \
188
300
and (os.WEXITSTATUS(condition) == 0):
189
logger.debug(u"Checker for %(name)s succeeded",
190
vars(self))
191
self.last_seen = now
301
logger.info(u"Checker for %(name)s succeeded",
302
vars(self))
303
self.last_checked_ok = now
192
304
gobject.source_remove(self.stop_initiator_tag)
193
305
self.stop_initiator_tag = gobject.timeout_add\
194
306
(self._timeout_milliseconds,
195
307
self.stop)
196
if not os.WIFEXITED(condition):
308
elif not os.WIFEXITED(condition):
197
309
logger.warning(u"Checker for %(name)s crashed?",
198
310
vars(self))
199
311
else:
200
logger.debug(u"Checker for %(name)s failed",
201
vars(self))
202
self.checker = None
203
self.checker_callback_tag = None
312
logger.info(u"Checker for %(name)s failed",
313
vars(self))
204
314
def start_checker(self):
205
315
"""Start a new checker subprocess if one is not running.
206
316
If a checker already exists, leave it running and do
207
317
nothing."""
318
# The reason for not killing a running checker is that if we
319
# did that, then if a checker (for some reason) started
320
# running slowly and taking more than 'interval' time, the
321
# client would inevitably timeout, since no checker would get
322
# a chance to run to completion. If we instead leave running
323
# checkers alone, the checker would have to take more time
324
# than 'timeout' for the client to be declared invalid, which
325
# is as it should be.
208
326
if self.checker is None:
209
logger.debug(u"Starting checker for %s",
210
self.name)
211
327
try:
212
command = self.check_command % self.fqdn
328
# In case check_command has exactly one % operator
329
command = self.check_command % self.host
213
330
except TypeError:
331
# Escape attributes for the shell
214
332
escaped_attrs = dict((key, re.escape(str(val)))
215
333
for key, val in
216
334
vars(self).iteritems())
217
335
try:
218
336
command = self.check_command % escaped_attrs
219
337
except TypeError, error:
220
logger.critical(u'Could not format string "%s": %s',
221
self.check_command, error)
338
logger.error(u'Could not format string "%s":'
339
u' %s', self.check_command, error)
222
340
return True # Try again later
223
341
try:
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:
342
logger.info(u"Starting checker %r for %s",
343
command, self.name)
344
# We don't need to redirect stdout and stderr, since
345
# in normal mode, that is already done by daemon(),
346
# and in debug mode we don't want to. (Stdin is
347
# always replaced by /dev/null.)
348
self.checker = subprocess.Popen(command,
349
close_fds=True,
350
shell=True, cwd="/")
351
self.checker_callback_tag = gobject.child_watch_add\
352
(self.checker.pid,
353
self.checker_callback)
354
except OSError, error:
234
355
logger.error(u"Failed to start subprocess: %s",
235
356
error)
236
357
# Re-run this periodically if run by gobject.timeout_add
237
358
return True
238
359
def stop_checker(self):
239
360
"""Force the checker process, if any, to stop."""
240
if not hasattr(self, "checker") or self.checker is None:
361
if self.checker_callback_tag:
362
gobject.source_remove(self.checker_callback_tag)
363
self.checker_callback_tag = None
364
if getattr(self, "checker", None) is None:
241
365
return
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)
366
logger.debug(u"Stopping checker for %(name)s", vars(self))
367
try:
368
os.kill(self.checker.pid, signal.SIGTERM)
369
#os.sleep(0.5)
370
#if self.checker.poll() is None:
371
# os.kill(self.checker.pid, signal.SIGKILL)
372
except OSError, error:
373
if error.errno != errno.ESRCH: # No such process
374
raise
247
375
self.checker = None
248
def still_valid(self, now=None):
376
def still_valid(self):
249
377
"""Has the timeout not yet passed for this client?"""
250
if now is None:
251
now = datetime.datetime.now()
252
if self.last_seen is None:
378
now = datetime.datetime.now()
379
if self.last_checked_ok is None:
253
380
return now < (self.created + self.timeout)
254
381
else:
255
return now < (self.last_seen + self.timeout)
382
return now < (self.last_checked_ok + self.timeout)
256
383
257
384
258
385
def peer_certificate(session):
386
"Return the peer's OpenPGP certificate as a bytestring"
259
387
# If not an OpenPGP certificate...
260
388
if gnutls.library.functions.gnutls_certificate_type_get\
261
389
(session._c_object) \
272
400
273
401
274
402
def fingerprint(openpgp):
275
# New empty GnuTLS certificate
276
crt = gnutls.library.types.gnutls_openpgp_crt_t()
277
gnutls.library.functions.gnutls_openpgp_crt_init\
278
(ctypes.byref(crt))
403
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
279
404
# New GnuTLS "datum" with the OpenPGP public key
280
405
datum = gnutls.library.types.gnutls_datum_t\
281
406
(ctypes.cast(ctypes.c_char_p(openpgp),
282
407
ctypes.POINTER(ctypes.c_ubyte)),
283
408
ctypes.c_uint(len(openpgp)))
409
# New empty GnuTLS certificate
410
crt = gnutls.library.types.gnutls_openpgp_crt_t()
411
gnutls.library.functions.gnutls_openpgp_crt_init\
412
(ctypes.byref(crt))
284
413
# Import the OpenPGP public key into the certificate
285
ret = gnutls.library.functions.gnutls_openpgp_crt_import\
286
(crt,
287
ctypes.byref(datum),
288
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
414
gnutls.library.functions.gnutls_openpgp_crt_import\
415
(crt, ctypes.byref(datum),
416
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
417
# Verify the self signature in the key
418
crtverify = ctypes.c_uint();
419
gnutls.library.functions.gnutls_openpgp_crt_verify_self\
420
(crt, 0, ctypes.byref(crtverify))
421
if crtverify.value != 0:
422
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
423
raise gnutls.errors.CertificateSecurityError("Verify failed")
289
424
# New buffer for the fingerprint
290
425
buffer = ctypes.create_string_buffer(20)
291
426
buffer_length = ctypes.c_size_t()
307
442
Note: This will run in its own forked process."""
308
443
309
444
def handle(self):
310
logger.debug(u"TCP connection from: %s",
445
logger.info(u"TCP connection from: %s",
311
446
unicode(self.client_address))
312
session = gnutls.connection.ClientSession(self.request,
313
gnutls.connection.\
314
X509Credentials())
447
session = gnutls.connection.ClientSession\
448
(self.request, gnutls.connection.X509Credentials())
449
450
line = self.request.makefile().readline()
451
logger.debug(u"Protocol version: %r", line)
452
try:
453
if int(line.strip().split()[0]) > 1:
454
raise RuntimeError
455
except (ValueError, IndexError, RuntimeError), error:
456
logger.error(u"Unknown protocol version: %s", error)
457
return
458
459
# Note: gnutls.connection.X509Credentials is really a generic
460
# GnuTLS certificate credentials object so long as no X.509
461
# keys are added to it. Therefore, we can use it here despite
462
# using OpenPGP certificates.
315
463
316
464
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
317
465
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
318
466
# "+DHE-DSS"))
319
priority = "SECURE256"
320
467
priority = "NORMAL" # Fallback default, since this
468
# MUST be set.
469
if self.server.settings["priority"]:
470
priority = self.server.settings["priority"]
321
471
gnutls.library.functions.gnutls_priority_set_direct\
322
472
(session._c_object, priority, None);
323
473
324
474
try:
325
475
session.handshake()
326
476
except gnutls.errors.GNUTLSError, error:
327
logger.debug(u"Handshake failed: %s", error)
477
logger.warning(u"Handshake failed: %s", error)
328
478
# Do not run session.bye() here: the session is not
329
479
# established. Just abandon the request.
330
480
return
331
481
try:
332
482
fpr = fingerprint(peer_certificate(session))
333
483
except (TypeError, gnutls.errors.GNUTLSError), error:
334
logger.debug(u"Bad certificate: %s", error)
484
logger.warning(u"Bad certificate: %s", error)
335
485
session.bye()
336
486
return
337
487
logger.debug(u"Fingerprint: %s", fpr)
338
488
client = None
339
for c in clients:
489
for c in self.server.clients:
340
490
if c.fingerprint == fpr:
341
491
client = c
342
492
break
493
if not client:
494
logger.warning(u"Client not found for fingerprint: %s",
495
fpr)
496
session.bye()
497
return
343
498
# Have to check if client.still_valid(), since it is possible
344
499
# that the client timed out while establishing the GnuTLS
345
500
# 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))
350
else:
351
logger.debug(u"Client not found for fingerprint: %s",
352
fpr)
501
if not client.still_valid():
502
logger.warning(u"Client %(name)s is invalid",
503
vars(client))
353
504
session.bye()
354
505
return
355
506
sent_size = 0
365
516
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
366
517
"""IPv6 TCP server. Accepts 'None' as address and/or port.
367
518
Attributes:
368
options: Command line options
519
settings: Server settings
369
520
clients: Set() of Client objects
521
enabled: Boolean; whether this server is activated yet
370
522
"""
371
523
address_family = socket.AF_INET6
372
524
def __init__(self, *args, **kwargs):
373
if "options" in kwargs:
374
self.options = kwargs["options"]
375
del kwargs["options"]
525
if "settings" in kwargs:
526
self.settings = kwargs["settings"]
527
del kwargs["settings"]
376
528
if "clients" in kwargs:
377
529
self.clients = kwargs["clients"]
378
530
del kwargs["clients"]
531
self.enabled = False
379
532
return super(type(self), self).__init__(*args, **kwargs)
380
533
def server_bind(self):
381
534
"""This overrides the normal server_bind() function
382
535
to bind to an interface if one was specified, and also NOT to
383
536
bind to an address or port if they were not specified."""
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
537
if self.settings["interface"]:
538
# 25 is from /usr/include/asm-i486/socket.h
539
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
388
540
try:
389
541
self.socket.setsockopt(socket.SOL_SOCKET,
390
socket.SO_BINDTODEVICE,
391
self.options.interface)
542
SO_BINDTODEVICE,
543
self.settings["interface"])
392
544
except socket.error, error:
393
545
if error[0] == errno.EPERM:
394
logger.warning(u"No permission to"
395
u" bind to interface %s",
396
self.options.interface)
546
logger.error(u"No permission to"
547
u" bind to interface %s",
548
self.settings["interface"])
397
549
else:
398
550
raise error
399
551
# Only bind(2) the socket if we really need to.
402
554
in6addr_any = "::"
403
555
self.server_address = (in6addr_any,
404
556
self.server_address[1])
405
elif self.server_address[1] is None:
557
elif not self.server_address[1]:
406
558
self.server_address = (self.server_address[0],
407
559
0)
560
# if self.settings["interface"]:
561
# self.server_address = (self.server_address[0],
562
# 0, # port
563
# 0, # flowinfo
564
# if_nametoindex
565
# (self.settings
566
# ["interface"]))
408
567
return super(type(self), self).server_bind()
568
def server_activate(self):
569
if self.enabled:
570
return super(type(self), self).server_activate()
571
def enable(self):
572
self.enabled = True
409
573
410
574
411
575
def string_to_delta(interval):
421
585
datetime.timedelta(1)
422
586
>>> string_to_delta(u'1w')
423
587
datetime.timedelta(7)
588
>>> string_to_delta('5m 30s')
589
datetime.timedelta(0, 330)
424
590
"""
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:
591
timevalue = datetime.timedelta(0)
592
for s in interval.split():
593
try:
594
suffix=unicode(s[-1])
595
value=int(s[:-1])
596
if suffix == u"d":
597
delta = datetime.timedelta(value)
598
elif suffix == u"s":
599
delta = datetime.timedelta(0, value)
600
elif suffix == u"m":
601
delta = datetime.timedelta(0, 0, 0, 0, value)
602
elif suffix == u"h":
603
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
604
elif suffix == u"w":
605
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
606
else:
607
raise ValueError
608
except (ValueError, IndexError):
439
609
raise ValueError
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()
610
timevalue += delta
611
return timevalue
476
612
477
613
478
614
def server_state_changed(state):
479
"""From the Avahi server example code"""
615
"""Derived from the Avahi example code"""
480
616
if state == avahi.SERVER_COLLISION:
481
logger.warning(u"Server name collision")
482
remove_service()
617
logger.error(u"Zeroconf server name collision")
618
service.remove()
483
619
elif state == avahi.SERVER_RUNNING:
484
add_service()
620
service.add()
485
621
486
622
487
623
def entry_group_state_changed(state, error):
488
"""From the Avahi server example code"""
489
global serviceName, server, rename_count
490
491
logger.debug(u"state change: %i", state)
624
"""Derived from the Avahi example code"""
625
logger.debug(u"Avahi state change: %i", state)
492
626
493
627
if state == avahi.ENTRY_GROUP_ESTABLISHED:
494
logger.debug(u"Service established.")
628
logger.debug(u"Zeroconf service established.")
495
629
elif state == avahi.ENTRY_GROUP_COLLISION:
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()
630
logger.warning(u"Zeroconf service name collision.")
631
service.rename()
510
632
elif state == avahi.ENTRY_GROUP_FAILURE:
511
logger.error(u"Error in group state changed %s",
512
unicode(error))
513
main_loop.quit()
514
return
515
633
logger.critical(u"Avahi: Error in group state changed %s",
634
unicode(error))
635
raise AvahiGroupError("State changed: %s", str(error))
516
636
517
637
def if_nametoindex(interface):
518
"""Call the C function if_nametoindex()"""
638
"""Call the C function if_nametoindex(), or equivalent"""
639
global if_nametoindex
519
640
try:
520
libc = ctypes.cdll.LoadLibrary("libc.so.6")
521
return libc.if_nametoindex(interface)
641
if "ctypes.util" not in sys.modules:
642
import ctypes.util
643
if_nametoindex = ctypes.cdll.LoadLibrary\
644
(ctypes.util.find_library("c")).if_nametoindex
522
645
except (OSError, AttributeError):
523
646
if "struct" not in sys.modules:
524
647
import struct
525
648
if "fcntl" not in sys.modules:
526
649
import fcntl
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()
650
def if_nametoindex(interface):
651
"Get an interface index the hard way, i.e. using fcntl()"
652
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
653
s = socket.socket()
654
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
655
struct.pack("16s16x", interface))
656
s.close()
657
interface_index = struct.unpack("I", ifreq[16:20])[0]
658
return interface_index
659
return if_nametoindex(interface)
660
661
662
def daemon(nochdir = False, noclose = False):
663
"""See daemon(3). Standard BSD Unix function.
664
This should really exist as os.daemon, but it doesn't (yet)."""
665
if os.fork():
666
sys.exit()
667
os.setsid()
668
if not nochdir:
669
os.chdir("/")
670
if os.fork():
671
sys.exit()
672
if not noclose:
673
# Close all standard open file descriptors
674
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
675
if not stat.S_ISCHR(os.fstat(null).st_mode):
676
raise OSError(errno.ENODEV,
677
"/dev/null not a character device")
678
os.dup2(null, sys.stdin.fileno())
679
os.dup2(null, sys.stdout.fileno())
680
os.dup2(null, sys.stderr.fileno())
681
if null > 2:
682
os.close(null)
683
684
685
def main():
686
global main_loop_started
687
main_loop_started = False
688
689
parser = OptionParser(version = "%%prog %s" % version)
538
690
parser.add_option("-i", "--interface", type="string",
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,
691
metavar="IF", help="Bind to interface IF")
692
parser.add_option("-a", "--address", type="string",
693
help="Address to listen for requests on")
694
parser.add_option("-p", "--port", type="int",
554
695
help="Port number to receive requests on")
555
parser.add_option("--timeout", type="string", # Parsed later
556
default="1h",
557
help="Amount of downtime allowed for clients")
558
parser.add_option("--interval", type="string", # Parsed later
559
default="5m",
560
help="How often to check that a client is up")
561
696
parser.add_option("--check", action="store_true", default=False,
562
697
help="Run self-test")
563
parser.add_option("--debug", action="store_true", default=False,
564
help="Debug mode")
698
parser.add_option("--debug", action="store_true",
699
help="Debug mode; run in foreground and log to"
700
" terminal")
701
parser.add_option("--priority", type="string", help="GnuTLS"
702
" priority string (see GnuTLS documentation)")
703
parser.add_option("--servicename", type="string", metavar="NAME",
704
help="Zeroconf service name")
705
parser.add_option("--configdir", type="string",
706
default="/etc/mandos", metavar="DIR",
707
help="Directory to search for configuration"
708
" files")
565
709
(options, args) = parser.parse_args()
566
710
567
711
if options.check:
569
713
doctest.testmod()
570
714
sys.exit()
571
715
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
716
# Default values for config file for server-global settings
717
server_defaults = { "interface": "",
718
"address": "",
719
"port": "",
720
"debug": "False",
721
"priority":
722
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
723
"servicename": "Mandos",
724
}
725
726
# Parse config file for server-global settings
727
server_config = ConfigParser.SafeConfigParser(server_defaults)
728
del server_defaults
729
server_config.read(os.path.join(options.configdir, "mandos.conf"))
730
# Convert the SafeConfigParser object to a dict
731
server_settings = server_config.defaults()
732
# Use getboolean on the boolean config option
733
server_settings["debug"] = server_config.getboolean\
734
("DEFAULT", "debug")
735
del server_config
736
737
# Override the settings from the config file with command line
738
# options, if set.
739
for option in ("interface", "address", "port", "debug",
740
"priority", "servicename", "configdir"):
741
value = getattr(options, option)
742
if value is not None:
743
server_settings[option] = value
744
del options
745
# Now we have our good server settings in "server_settings"
746
747
debug = server_settings["debug"]
748
749
if not debug:
750
syslogger.setLevel(logging.WARNING)
751
console.setLevel(logging.WARNING)
752
753
if server_settings["servicename"] != "Mandos":
754
syslogger.setFormatter(logging.Formatter\
755
('Mandos (%s): %%(levelname)s:'
756
' %%(message)s'
757
% server_settings["servicename"]))
758
759
# Parse config file with clients
760
client_defaults = { "timeout": "1h",
761
"interval": "5m",
762
"checker": "fping -q -- %(host)s",
763
"host": "",
764
}
765
client_config = ConfigParser.SafeConfigParser(client_defaults)
766
client_config.read(os.path.join(server_settings["configdir"],
767
"clients.conf"))
768
769
clients = Set()
770
tcp_server = IPv6_TCPServer((server_settings["address"],
771
server_settings["port"]),
772
tcp_handler,
773
settings=server_settings,
774
clients=clients)
775
pidfilename = "/var/run/mandos.pid"
776
try:
777
pidfile = open(pidfilename, "w")
778
except IOError, error:
779
logger.error("Could not open file %r", pidfilename)
780
781
uid = 65534
782
gid = 65534
783
try:
784
uid = pwd.getpwnam("mandos").pw_uid
785
except KeyError:
786
try:
787
uid = pwd.getpwnam("nobody").pw_uid
788
except KeyError:
789
pass
790
try:
791
gid = pwd.getpwnam("mandos").pw_gid
792
except KeyError:
793
try:
794
gid = pwd.getpwnam("nogroup").pw_gid
795
except KeyError:
796
pass
797
try:
798
os.setuid(uid)
799
os.setgid(gid)
800
except OSError, error:
801
if error[0] != errno.EPERM:
802
raise error
803
804
global service
805
service = AvahiService(name = server_settings["servicename"],
806
type = "_mandos._tcp", );
807
if server_settings["interface"]:
808
service.interface = if_nametoindex\
809
(server_settings["interface"])
810
811
global main_loop
812
global bus
813
global server
814
# From the Avahi example code
589
815
DBusGMainLoop(set_as_default=True )
590
816
main_loop = gobject.MainLoop()
591
817
bus = dbus.SystemBus()
592
server = dbus.Interface(
593
bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
594
avahi.DBUS_INTERFACE_SERVER )
818
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
819
avahi.DBUS_PATH_SERVER),
820
avahi.DBUS_INTERFACE_SERVER)
595
821
# End of Avahi example code
596
822
597
debug = options.debug
598
599
clients = Set()
600
823
def remove_from_clients(client):
601
824
clients.remove(client)
602
825
if not clients:
603
logger.debug(u"No clients left, exiting")
604
main_loop.quit()
826
logger.critical(u"No clients left, exiting")
827
sys.exit()
605
828
606
clients.update(Set(Client(name=section, options=options,
829
clients.update(Set(Client(name = section,
607
830
stop_hook = remove_from_clients,
608
**(dict(client_config\
609
.items(section))))
831
config
832
= dict(client_config.items(section)))
610
833
for section in client_config.sections()))
834
if not clients:
835
logger.critical(u"No clients defined")
836
sys.exit(1)
837
838
if debug:
839
# Redirect stdin so all checkers get /dev/null
840
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
841
os.dup2(null, sys.stdin.fileno())
842
if null > 2:
843
os.close(null)
844
else:
845
# No console logging
846
logger.removeHandler(console)
847
# Close all input and output, do double fork, etc.
848
daemon()
849
850
try:
851
pid = os.getpid()
852
pidfile.write(str(pid) + "\n")
853
pidfile.close()
854
del pidfile
855
except IOError, err:
856
logger.error(u"Could not write to file %r with PID %d",
857
pidfilename, pid)
858
except NameError:
859
# "pidfile" was never created
860
pass
861
del pidfilename
862
863
def cleanup():
864
"Cleanup function; run on exit"
865
global group
866
# From the Avahi example code
867
if not group is None:
868
group.Free()
869
group = None
870
# End of Avahi example code
871
872
while clients:
873
client = clients.pop()
874
client.stop_hook = None
875
client.stop()
876
877
atexit.register(cleanup)
878
879
if not debug:
880
signal.signal(signal.SIGINT, signal.SIG_IGN)
881
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
882
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
883
611
884
for client in clients:
612
885
client.start()
613
886
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)
887
tcp_server.enable()
888
tcp_server.server_activate()
889
890
# Find out what port we got
891
service.port = tcp_server.socket.getsockname()[1]
892
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
893
u" scope_id %d" % tcp_server.socket.getsockname())
894
895
#service.interface = tcp_server.socket.getsockname()[3]
896
634
897
try:
898
# From the Avahi example code
899
server.connect_to_signal("StateChanged", server_state_changed)
900
try:
901
server_state_changed(server.GetState())
902
except dbus.exceptions.DBusException, error:
903
logger.critical(u"DBusException: %s", error)
904
sys.exit(1)
905
# End of Avahi example code
906
907
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
908
lambda *args, **kwargs:
909
tcp_server.handle_request\
910
(*args[2:], **kwargs) or True)
911
912
logger.debug(u"Starting main loop")
913
main_loop_started = True
635
914
main_loop.run()
915
except AvahiError, error:
916
logger.critical(u"AvahiError: %s" + unicode(error))
917
sys.exit(1)
636
918
except KeyboardInterrupt:
637
print
638
639
# Cleanup here
919
if debug:
920
print
640
921
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()
922
if __name__ == '__main__':
923
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0