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- Committer: Teddy Hogeborn
- Date: 2008-07-22 01:59:47 UTC
- Revision ID: teddy@fukt.bsnet.se-20080722015947-y7o6keji020nvrhw
* Makefile (OPTIMIZE): New; optimize for size.
(CFLAGS): Use $(OPTIMIZE).
(CFLAGS): Use $(OPTIMIZE).
- files added:
- ca.pem
- files removed:
- mandos-client.xml
- files renamed:
- clients.conf => mandos-clients.conf
- mandos-client.c => plugbasedclient.c
- plugins.d/password-request.c => plugins.d/mandosclient.c
- plugins.d/password-prompt.c => plugins.d/passprompt.c
- mandos => server.py
- files modified:
- Makefile
added
removed
server.py
6
6
# This program is partly derived from an example program for an Avahi
7
7
# service publisher, downloaded from
8
8
# <http://avahi.org/wiki/PythonPublishExample>. This includes the
9
# methods "add" and "remove" in the "AvahiService" class, the
10
# "server_state_changed" and "entry_group_state_changed" functions,
11
# and some lines in "main".
9
# following functions: "add_service", "remove_service",
10
# "server_state_changed", "entry_group_state_changed", and some lines
11
# in "main".
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12
#
13
# Everything else is
14
# Copyright © 2007-2008 Teddy Hogeborn & Björn Påhlsson
13
# Everything else is Copyright © 2007-2008 Teddy Hogeborn and Björn
14
# Påhlsson.
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15
#
16
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# This program is free software: you can redistribute it and/or modify
17
17
# it under the terms of the GNU General Public License as published by
26
26
# You should have received a copy of the GNU General Public License
27
27
# along with this program. If not, see <http://www.gnu.org/licenses/>.
28
28
#
29
# Contact the authors at <mandos@fukt.bsnet.se>.
29
# Contact the authors at <https://www.fukt.bsnet.se/~belorn/> and
30
# <https://www.fukt.bsnet.se/~teddy/>.
30
31
#
31
32
32
33
from __future__ import division
61
62
from dbus.mainloop.glib import DBusGMainLoop
62
63
import ctypes
63
64
65
# Brief description of the operation of this program:
66
#
67
# This server announces itself as a Zeroconf service. Connecting
68
# clients use the TLS protocol, with the unusual quirk that this
69
# server program acts as a TLS "client" while the connecting clients
70
# acts as a TLS "server". The clients (acting as a TLS "server") must
71
# supply an OpenPGP certificate, and the fingerprint of this
72
# certificate is used by this server to look up (in a list read from a
73
# file at start time) which binary blob to give the client. No other
74
# authentication or authorization is done by this server.
75
64
76
65
77
logger = logging.Logger('mandos')
66
78
syslogger = logging.handlers.SysLogHandler\
67
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
68
address = "/dev/log")
79
(facility = logging.handlers.SysLogHandler.LOG_DAEMON)
69
80
syslogger.setFormatter(logging.Formatter\
70
('Mandos: %(levelname)s: %(message)s'))
81
('%(levelname)s: %(message)s'))
71
82
logger.addHandler(syslogger)
72
73
74
class AvahiError(Exception):
75
def __init__(self, value):
76
self.value = value
77
def __str__(self):
78
return repr(self.value)
79
80
class AvahiServiceError(AvahiError):
81
pass
82
83
class AvahiGroupError(AvahiError):
84
pass
85
86
87
class AvahiService(object):
88
"""An Avahi (Zeroconf) service.
89
Attributes:
90
interface: integer; avahi.IF_UNSPEC or an interface index.
91
Used to optionally bind to the specified interface.
92
name: string; Example: 'Mandos'
93
type: string; Example: '_mandos._tcp'.
94
See <http://www.dns-sd.org/ServiceTypes.html>
95
port: integer; what port to announce
96
TXT: list of strings; TXT record for the service
97
domain: string; Domain to publish on, default to .local if empty.
98
host: string; Host to publish records for, default is localhost
99
max_renames: integer; maximum number of renames
100
rename_count: integer; counter so we only rename after collisions
101
a sensible number of times
102
"""
103
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
104
type = None, port = None, TXT = None, domain = "",
105
host = "", max_renames = 32768):
106
self.interface = interface
107
self.name = name
108
self.type = type
109
self.port = port
110
if TXT is None:
111
self.TXT = []
112
else:
113
self.TXT = TXT
114
self.domain = domain
115
self.host = host
116
self.rename_count = 0
117
def rename(self):
118
"""Derived from the Avahi example code"""
119
if self.rename_count >= self.max_renames:
120
logger.critical(u"No suitable service name found after %i"
121
u" retries, exiting.", rename_count)
122
raise AvahiServiceError("Too many renames")
123
name = server.GetAlternativeServiceName(name)
124
logger.error(u"Changing name to %r ...", name)
125
syslogger.setFormatter(logging.Formatter\
126
('Mandos (%s): %%(levelname)s:'
127
' %%(message)s' % name))
128
self.remove()
129
self.add()
130
self.rename_count += 1
131
def remove(self):
132
"""Derived from the Avahi example code"""
133
if group is not None:
134
group.Reset()
135
def add(self):
136
"""Derived from the Avahi example code"""
137
global group
138
if group is None:
139
group = dbus.Interface\
140
(bus.get_object(avahi.DBUS_NAME,
141
server.EntryGroupNew()),
142
avahi.DBUS_INTERFACE_ENTRY_GROUP)
143
group.connect_to_signal('StateChanged',
144
entry_group_state_changed)
145
logger.debug(u"Adding service '%s' of type '%s' ...",
146
service.name, service.type)
147
group.AddService(
148
self.interface, # interface
149
avahi.PROTO_INET6, # protocol
150
dbus.UInt32(0), # flags
151
self.name, self.type,
152
self.domain, self.host,
153
dbus.UInt16(self.port),
154
avahi.string_array_to_txt_array(self.TXT))
155
group.Commit()
156
83
del syslogger
84
85
# This variable is used to optionally bind to a specified interface.
86
# It is a global variable to fit in with the other variables from the
87
# Avahi example code.
88
serviceInterface = avahi.IF_UNSPEC
157
89
# From the Avahi example code:
158
group = None # our entry group
90
serviceName = "Mandos"
91
serviceType = "_mandos._tcp" # http://www.dns-sd.org/ServiceTypes.html
92
servicePort = None # Not known at startup
93
serviceTXT = [] # TXT record for the service
94
domain = "" # Domain to publish on, default to .local
95
host = "" # Host to publish records for, default to localhost
96
group = None #our entry group
97
rename_count = 12 # Counter so we only rename after collisions a
98
# sensible number of times
159
99
# End of Avahi example code
160
100
161
101
166
106
fingerprint: string (40 or 32 hexadecimal digits); used to
167
107
uniquely identify the client
168
108
secret: bytestring; sent verbatim (over TLS) to client
169
host: string; available for use by the checker command
170
created: datetime.datetime(); object creation, not client host
171
last_checked_ok: datetime.datetime() or None if not yet checked OK
172
timeout: datetime.timedelta(); How long from last_checked_ok
173
until this client is invalid
109
fqdn: string (FQDN); available for use by the checker command
110
created: datetime.datetime()
111
last_seen: datetime.datetime() or None if not yet seen
112
timeout: datetime.timedelta(); How long from last_seen until
113
this client is invalid
174
114
interval: datetime.timedelta(); How often to start a new checker
175
115
stop_hook: If set, called by stop() as stop_hook(self)
176
116
checker: subprocess.Popen(); a running checker process used
177
117
to see if the client lives.
178
'None' if no process is running.
118
Is None if no process is running.
179
119
checker_initiator_tag: a gobject event source tag, or None
180
120
stop_initiator_tag: - '' -
181
121
checker_callback_tag: - '' -
182
122
checker_command: string; External command which is run to check if
183
client lives. %() expansions are done at
123
client lives. %()s expansions are done at
184
124
runtime with vars(self) as dict, so that for
185
125
instance %(name)s can be used in the command.
186
126
Private attibutes:
187
127
_timeout: Real variable for 'timeout'
188
128
_interval: Real variable for 'interval'
189
_timeout_milliseconds: Used when calling gobject.timeout_add()
129
_timeout_milliseconds: Used by gobject.timeout_add()
190
130
_interval_milliseconds: - '' -
191
131
"""
192
132
def _set_timeout(self, timeout):
212
152
interval = property(lambda self: self._interval,
213
153
_set_interval)
214
154
del _set_interval
215
def __init__(self, name = None, stop_hook=None, config={}):
216
"""Note: the 'checker' key in 'config' sets the
217
'checker_command' attribute and *not* the 'checker'
218
attribute."""
155
def __init__(self, name=None, options=None, stop_hook=None,
156
fingerprint=None, secret=None, secfile=None,
157
fqdn=None, timeout=None, interval=-1, checker=None):
158
"""Note: the 'checker' argument sets the 'checker_command'
159
attribute and not the 'checker' attribute.."""
219
160
self.name = name
220
logger.debug(u"Creating client %r", self.name)
221
# Uppercase and remove spaces from fingerprint for later
222
# comparison purposes with return value from the fingerprint()
223
# function
224
self.fingerprint = config["fingerprint"].upper()\
225
.replace(u" ", u"")
226
logger.debug(u" Fingerprint: %s", self.fingerprint)
227
if "secret" in config:
228
self.secret = config["secret"].decode(u"base64")
229
elif "secfile" in config:
230
sf = open(config["secfile"])
161
# Uppercase and remove spaces from fingerprint
162
# for later comparison purposes with return value of
163
# the fingerprint() function
164
self.fingerprint = fingerprint.upper().replace(u" ", u"")
165
if secret:
166
self.secret = secret.decode(u"base64")
167
elif secfile:
168
sf = open(secfile)
231
169
self.secret = sf.read()
232
170
sf.close()
233
171
else:
234
raise TypeError(u"No secret or secfile for client %s"
235
% self.name)
236
self.host = config.get("host", "")
172
raise RuntimeError(u"No secret or secfile for client %s"
173
% self.name)
174
self.fqdn = fqdn # string
237
175
self.created = datetime.datetime.now()
238
self.last_checked_ok = None
239
self.timeout = string_to_delta(config["timeout"])
240
self.interval = string_to_delta(config["interval"])
176
self.last_seen = None
177
if timeout is None:
178
self.timeout = options.timeout
179
else:
180
self.timeout = string_to_delta(timeout)
181
if interval == -1:
182
self.interval = options.interval
183
else:
184
self.interval = string_to_delta(interval)
241
185
self.stop_hook = stop_hook
242
186
self.checker = None
243
187
self.checker_initiator_tag = None
244
188
self.stop_initiator_tag = None
245
189
self.checker_callback_tag = None
246
self.check_command = config["checker"]
190
self.check_command = checker
247
191
def start(self):
248
192
"""Start this client's checker and timeout hooks"""
249
193
# Schedule a new checker to be started an 'interval' from now,
259
203
self.stop)
260
204
def stop(self):
261
205
"""Stop this client.
262
The possibility that a client might be restarted is left open,
263
but not currently used."""
206
The possibility that this client might be restarted is left
207
open, but not currently used."""
264
208
# If this client doesn't have a secret, it is already stopped.
265
if hasattr(self, "secret") and self.secret:
266
logger.info(u"Stopping client %s", self.name)
209
if self.secret:
210
logger.debug(u"Stopping client %s", self.name)
267
211
self.secret = None
268
212
else:
269
213
return False
270
if getattr(self, "stop_initiator_tag", False):
214
if hasattr(self, "stop_initiator_tag") \
215
and self.stop_initiator_tag:
271
216
gobject.source_remove(self.stop_initiator_tag)
272
217
self.stop_initiator_tag = None
273
if getattr(self, "checker_initiator_tag", False):
218
if hasattr(self, "checker_initiator_tag") \
219
and self.checker_initiator_tag:
274
220
gobject.source_remove(self.checker_initiator_tag)
275
221
self.checker_initiator_tag = None
276
222
self.stop_checker()
288
234
self.checker = None
289
235
if os.WIFEXITED(condition) \
290
236
and (os.WEXITSTATUS(condition) == 0):
291
logger.info(u"Checker for %(name)s succeeded",
292
vars(self))
293
self.last_checked_ok = now
237
logger.debug(u"Checker for %(name)s succeeded",
238
vars(self))
239
self.last_seen = now
294
240
gobject.source_remove(self.stop_initiator_tag)
295
241
self.stop_initiator_tag = gobject.timeout_add\
296
242
(self._timeout_milliseconds,
299
245
logger.warning(u"Checker for %(name)s crashed?",
300
246
vars(self))
301
247
else:
302
logger.info(u"Checker for %(name)s failed",
303
vars(self))
248
logger.debug(u"Checker for %(name)s failed",
249
vars(self))
304
250
def start_checker(self):
305
251
"""Start a new checker subprocess if one is not running.
306
252
If a checker already exists, leave it running and do
315
261
# is as it should be.
316
262
if self.checker is None:
317
263
try:
318
# In case check_command has exactly one % operator
319
command = self.check_command % self.host
264
command = self.check_command % self.fqdn
320
265
except TypeError:
321
# Escape attributes for the shell
322
266
escaped_attrs = dict((key, re.escape(str(val)))
323
267
for key, val in
324
268
vars(self).iteritems())
325
269
try:
326
270
command = self.check_command % escaped_attrs
327
271
except TypeError, error:
328
logger.error(u'Could not format string "%s":'
329
u' %s', self.check_command, error)
272
logger.critical(u'Could not format string "%s":'
273
u' %s', self.check_command, error)
330
274
return True # Try again later
331
275
try:
332
logger.info(u"Starting checker %r for %s",
333
command, self.name)
334
self.checker = subprocess.Popen(command,
335
close_fds=True,
336
shell=True, cwd="/")
276
logger.debug(u"Starting checker %r for %s",
277
command, self.name)
278
self.checker = subprocess.\
279
Popen(command,
280
close_fds=True, shell=True,
281
cwd="/")
337
282
self.checker_callback_tag = gobject.child_watch_add\
338
283
(self.checker.pid,
339
284
self.checker_callback)
347
292
if self.checker_callback_tag:
348
293
gobject.source_remove(self.checker_callback_tag)
349
294
self.checker_callback_tag = None
350
if getattr(self, "checker", None) is None:
295
if not hasattr(self, "checker") or self.checker is None:
351
296
return
352
logger.debug(u"Stopping checker for %(name)s", vars(self))
297
logger.debug("Stopping checker for %(name)s", vars(self))
353
298
try:
354
299
os.kill(self.checker.pid, signal.SIGTERM)
355
300
#os.sleep(0.5)
356
301
#if self.checker.poll() is None:
357
302
# os.kill(self.checker.pid, signal.SIGKILL)
358
303
except OSError, error:
359
if error.errno != errno.ESRCH: # No such process
304
if error.errno != errno.ESRCH:
360
305
raise
361
306
self.checker = None
362
def still_valid(self):
307
def still_valid(self, now=None):
363
308
"""Has the timeout not yet passed for this client?"""
364
now = datetime.datetime.now()
365
if self.last_checked_ok is None:
309
if now is None:
310
now = datetime.datetime.now()
311
if self.last_seen is None:
366
312
return now < (self.created + self.timeout)
367
313
else:
368
return now < (self.last_checked_ok + self.timeout)
314
return now < (self.last_seen + self.timeout)
369
315
370
316
371
317
def peer_certificate(session):
387
333
388
334
def fingerprint(openpgp):
389
335
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
336
# New empty GnuTLS certificate
337
crt = gnutls.library.types.gnutls_openpgp_crt_t()
338
gnutls.library.functions.gnutls_openpgp_crt_init\
339
(ctypes.byref(crt))
390
340
# New GnuTLS "datum" with the OpenPGP public key
391
341
datum = gnutls.library.types.gnutls_datum_t\
392
342
(ctypes.cast(ctypes.c_char_p(openpgp),
393
343
ctypes.POINTER(ctypes.c_ubyte)),
394
344
ctypes.c_uint(len(openpgp)))
395
# New empty GnuTLS certificate
396
crt = gnutls.library.types.gnutls_openpgp_crt_t()
397
gnutls.library.functions.gnutls_openpgp_crt_init\
398
(ctypes.byref(crt))
399
345
# Import the OpenPGP public key into the certificate
400
gnutls.library.functions.gnutls_openpgp_crt_import\
401
(crt, ctypes.byref(datum),
402
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
346
ret = gnutls.library.functions.gnutls_openpgp_crt_import\
347
(crt,
348
ctypes.byref(datum),
349
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
403
350
# New buffer for the fingerprint
404
351
buffer = ctypes.create_string_buffer(20)
405
352
buffer_length = ctypes.c_size_t()
421
368
Note: This will run in its own forked process."""
422
369
423
370
def handle(self):
424
logger.info(u"TCP connection from: %s",
371
logger.debug(u"TCP connection from: %s",
425
372
unicode(self.client_address))
426
session = gnutls.connection.ClientSession\
427
(self.request, gnutls.connection.X509Credentials())
428
429
line = self.request.makefile().readline()
430
logger.debug(u"Protocol version: %r", line)
431
try:
432
if int(line.strip().split()[0]) > 1:
433
raise RuntimeError
434
except (ValueError, IndexError, RuntimeError), error:
435
logger.error(u"Unknown protocol version: %s", error)
436
return
437
438
# Note: gnutls.connection.X509Credentials is really a generic
439
# GnuTLS certificate credentials object so long as no X.509
440
# keys are added to it. Therefore, we can use it here despite
441
# using OpenPGP certificates.
373
session = gnutls.connection.ClientSession(self.request,
374
gnutls.connection.\
375
X509Credentials())
442
376
443
377
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
444
378
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
445
379
# "+DHE-DSS"))
446
priority = "NORMAL" # Fallback default, since this
447
# MUST be set.
448
if self.server.settings["priority"]:
449
priority = self.server.settings["priority"]
380
priority = "SECURE256"
381
450
382
gnutls.library.functions.gnutls_priority_set_direct\
451
383
(session._c_object, priority, None);
452
384
453
385
try:
454
386
session.handshake()
455
387
except gnutls.errors.GNUTLSError, error:
456
logger.warning(u"Handshake failed: %s", error)
388
logger.debug(u"Handshake failed: %s", error)
457
389
# Do not run session.bye() here: the session is not
458
390
# established. Just abandon the request.
459
391
return
460
392
try:
461
393
fpr = fingerprint(peer_certificate(session))
462
394
except (TypeError, gnutls.errors.GNUTLSError), error:
463
logger.warning(u"Bad certificate: %s", error)
395
logger.debug(u"Bad certificate: %s", error)
464
396
session.bye()
465
397
return
466
398
logger.debug(u"Fingerprint: %s", fpr)
469
401
if c.fingerprint == fpr:
470
402
client = c
471
403
break
472
if not client:
473
logger.warning(u"Client not found for fingerprint: %s",
474
fpr)
475
session.bye()
476
return
477
404
# Have to check if client.still_valid(), since it is possible
478
405
# that the client timed out while establishing the GnuTLS
479
406
# session.
480
if not client.still_valid():
481
logger.warning(u"Client %(name)s is invalid",
482
vars(client))
407
if (not client) or (not client.still_valid()):
408
if client:
409
logger.debug(u"Client %(name)s is invalid",
410
vars(client))
411
else:
412
logger.debug(u"Client not found for fingerprint: %s",
413
fpr)
483
414
session.bye()
484
415
return
485
416
sent_size = 0
495
426
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
496
427
"""IPv6 TCP server. Accepts 'None' as address and/or port.
497
428
Attributes:
498
settings: Server settings
429
options: Command line options
499
430
clients: Set() of Client objects
500
431
"""
501
432
address_family = socket.AF_INET6
502
433
def __init__(self, *args, **kwargs):
503
if "settings" in kwargs:
504
self.settings = kwargs["settings"]
505
del kwargs["settings"]
434
if "options" in kwargs:
435
self.options = kwargs["options"]
436
del kwargs["options"]
506
437
if "clients" in kwargs:
507
438
self.clients = kwargs["clients"]
508
439
del kwargs["clients"]
511
442
"""This overrides the normal server_bind() function
512
443
to bind to an interface if one was specified, and also NOT to
513
444
bind to an address or port if they were not specified."""
514
if self.settings["interface"]:
515
# 25 is from /usr/include/asm-i486/socket.h
516
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
445
if self.options.interface:
446
if not hasattr(socket, "SO_BINDTODEVICE"):
447
# From /usr/include/asm-i486/socket.h
448
socket.SO_BINDTODEVICE = 25
517
449
try:
518
450
self.socket.setsockopt(socket.SOL_SOCKET,
519
SO_BINDTODEVICE,
520
self.settings["interface"])
451
socket.SO_BINDTODEVICE,
452
self.options.interface)
521
453
except socket.error, error:
522
454
if error[0] == errno.EPERM:
523
logger.error(u"No permission to"
524
u" bind to interface %s",
525
self.settings["interface"])
455
logger.warning(u"No permission to"
456
u" bind to interface %s",
457
self.options.interface)
526
458
else:
527
459
raise error
528
460
# Only bind(2) the socket if we really need to.
531
463
in6addr_any = "::"
532
464
self.server_address = (in6addr_any,
533
465
self.server_address[1])
534
elif not self.server_address[1]:
466
elif self.server_address[1] is None:
535
467
self.server_address = (self.server_address[0],
536
468
0)
537
# if self.settings["interface"]:
538
# self.server_address = (self.server_address[0],
539
# 0, # port
540
# 0, # flowinfo
541
# if_nametoindex
542
# (self.settings
543
# ["interface"]))
544
469
return super(type(self), self).server_bind()
545
470
546
471
578
503
return delta
579
504
580
505
506
def add_service():
507
"""Derived from the Avahi example code"""
508
global group, serviceName, serviceType, servicePort, serviceTXT, \
509
domain, host
510
if group is None:
511
group = dbus.Interface(
512
bus.get_object( avahi.DBUS_NAME,
513
server.EntryGroupNew()),
514
avahi.DBUS_INTERFACE_ENTRY_GROUP)
515
group.connect_to_signal('StateChanged',
516
entry_group_state_changed)
517
logger.debug(u"Adding service '%s' of type '%s' ...",
518
serviceName, serviceType)
519
520
group.AddService(
521
serviceInterface, # interface
522
avahi.PROTO_INET6, # protocol
523
dbus.UInt32(0), # flags
524
serviceName, serviceType,
525
domain, host,
526
dbus.UInt16(servicePort),
527
avahi.string_array_to_txt_array(serviceTXT))
528
group.Commit()
529
530
531
def remove_service():
532
"""From the Avahi example code"""
533
global group
534
535
if not group is None:
536
group.Reset()
537
538
581
539
def server_state_changed(state):
582
540
"""Derived from the Avahi example code"""
583
541
if state == avahi.SERVER_COLLISION:
584
logger.error(u"Server name collision")
585
service.remove()
542
logger.warning(u"Server name collision")
543
remove_service()
586
544
elif state == avahi.SERVER_RUNNING:
587
service.add()
545
add_service()
588
546
589
547
590
548
def entry_group_state_changed(state, error):
591
549
"""Derived from the Avahi example code"""
550
global serviceName, server, rename_count
551
592
552
logger.debug(u"state change: %i", state)
593
553
594
554
if state == avahi.ENTRY_GROUP_ESTABLISHED:
595
555
logger.debug(u"Service established.")
596
556
elif state == avahi.ENTRY_GROUP_COLLISION:
597
logger.warning(u"Service name collision.")
598
service.rename()
557
558
rename_count = rename_count - 1
559
if rename_count > 0:
560
name = server.GetAlternativeServiceName(name)
561
logger.warning(u"Service name collision, "
562
u"changing name to '%s' ...", name)
563
remove_service()
564
add_service()
565
566
else:
567
logger.error(u"No suitable service name found after %i"
568
u" retries, exiting.", n_rename)
569
killme(1)
599
570
elif state == avahi.ENTRY_GROUP_FAILURE:
600
logger.critical(u"Error in group state changed %s",
601
unicode(error))
602
raise AvahiGroupError("State changed: %s", str(error))
571
logger.error(u"Error in group state changed %s",
572
unicode(error))
573
killme(1)
574
603
575
604
576
def if_nametoindex(interface):
605
"""Call the C function if_nametoindex(), or equivalent"""
606
global if_nametoindex
577
"""Call the C function if_nametoindex()"""
607
578
try:
608
if "ctypes.util" not in sys.modules:
609
import ctypes.util
610
if_nametoindex = ctypes.cdll.LoadLibrary\
611
(ctypes.util.find_library("c")).if_nametoindex
579
libc = ctypes.cdll.LoadLibrary("libc.so.6")
580
return libc.if_nametoindex(interface)
612
581
except (OSError, AttributeError):
613
582
if "struct" not in sys.modules:
614
583
import struct
615
584
if "fcntl" not in sys.modules:
616
585
import fcntl
617
def if_nametoindex(interface):
618
"Get an interface index the hard way, i.e. using fcntl()"
619
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
620
s = socket.socket()
621
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
622
struct.pack("16s16x", interface))
623
s.close()
624
interface_index = struct.unpack("I", ifreq[16:20])[0]
625
return interface_index
626
return if_nametoindex(interface)
627
628
629
def daemon(nochdir = False, noclose = False):
586
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
587
s = socket.socket()
588
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
589
struct.pack("16s16x", interface))
590
s.close()
591
interface_index = struct.unpack("I", ifreq[16:20])[0]
592
return interface_index
593
594
595
def daemon(nochdir, noclose):
630
596
"""See daemon(3). Standard BSD Unix function.
631
597
This should really exist as os.daemon, but it doesn't (yet)."""
632
598
if os.fork():
634
600
os.setsid()
635
601
if not nochdir:
636
602
os.chdir("/")
637
if os.fork():
638
sys.exit()
639
603
if not noclose:
640
604
# Close all standard open file descriptors
641
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
605
null = os.open("/dev/null", os.O_NOCTTY | os.O_RDWR)
642
606
if not stat.S_ISCHR(os.fstat(null).st_mode):
643
607
raise OSError(errno.ENODEV,
644
608
"/dev/null not a character device")
649
613
os.close(null)
650
614
651
615
616
def killme(status = 0):
617
logger.debug("Stopping server with exit status %d", status)
618
exitstatus = status
619
if main_loop_started:
620
main_loop.quit()
621
else:
622
sys.exit(status)
623
624
652
625
def main():
626
global exitstatus
627
exitstatus = 0
653
628
global main_loop_started
654
629
main_loop_started = False
655
630
656
631
parser = OptionParser()
657
632
parser.add_option("-i", "--interface", type="string",
658
metavar="IF", help="Bind to interface IF")
659
parser.add_option("-a", "--address", type="string",
633
default=None, metavar="IF",
634
help="Bind to interface IF")
635
parser.add_option("-a", "--address", type="string", default=None,
660
636
help="Address to listen for requests on")
661
parser.add_option("-p", "--port", type="int",
637
parser.add_option("-p", "--port", type="int", default=None,
662
638
help="Port number to receive requests on")
639
parser.add_option("--timeout", type="string", # Parsed later
640
default="1h",
641
help="Amount of downtime allowed for clients")
642
parser.add_option("--interval", type="string", # Parsed later
643
default="5m",
644
help="How often to check that a client is up")
663
645
parser.add_option("--check", action="store_true", default=False,
664
646
help="Run self-test")
665
parser.add_option("--debug", action="store_true",
666
help="Debug mode; run in foreground and log to"
667
" terminal")
668
parser.add_option("--priority", type="string", help="GnuTLS"
669
" priority string (see GnuTLS documentation)")
670
parser.add_option("--servicename", type="string", metavar="NAME",
671
help="Zeroconf service name")
672
parser.add_option("--configdir", type="string",
673
default="/etc/mandos", metavar="DIR",
674
help="Directory to search for configuration"
675
" files")
647
parser.add_option("--debug", action="store_true", default=False,
648
help="Debug mode")
676
649
(options, args) = parser.parse_args()
677
650
678
651
if options.check:
680
653
doctest.testmod()
681
654
sys.exit()
682
655
683
# Default values for config file for server-global settings
684
server_defaults = { "interface": "",
685
"address": "",
686
"port": "",
687
"debug": "False",
688
"priority":
689
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
690
"servicename": "Mandos",
691
}
692
693
# Parse config file for server-global settings
694
server_config = ConfigParser.SafeConfigParser(server_defaults)
695
del server_defaults
696
server_config.read(os.path.join(options.configdir, "mandos.conf"))
697
server_section = "server"
698
# Convert the SafeConfigParser object to a dict
699
server_settings = dict(server_config.items(server_section))
700
# Use getboolean on the boolean config option
701
server_settings["debug"] = server_config.getboolean\
702
(server_section, "debug")
703
del server_config
704
705
# Override the settings from the config file with command line
706
# options, if set.
707
for option in ("interface", "address", "port", "debug",
708
"priority", "servicename", "configdir"):
709
value = getattr(options, option)
710
if value is not None:
711
server_settings[option] = value
712
del options
713
# Now we have our good server settings in "server_settings"
714
715
debug = server_settings["debug"]
716
717
if not debug:
718
syslogger.setLevel(logging.WARNING)
719
720
if server_settings["servicename"] != "Mandos":
721
syslogger.setFormatter(logging.Formatter\
722
('Mandos (%s): %%(levelname)s:'
723
' %%(message)s'
724
% server_settings["servicename"]))
725
726
# Parse config file with clients
727
client_defaults = { "timeout": "1h",
728
"interval": "5m",
729
"checker": "fping -q -- %%(host)s",
730
}
731
client_config = ConfigParser.SafeConfigParser(client_defaults)
732
client_config.read(os.path.join(server_settings["configdir"],
733
"clients.conf"))
734
735
global service
736
service = AvahiService(name = server_settings["servicename"],
737
type = "_mandos._tcp", );
738
if server_settings["interface"]:
739
service.interface = if_nametoindex(server_settings["interface"])
656
# Parse the time arguments
657
try:
658
options.timeout = string_to_delta(options.timeout)
659
except ValueError:
660
parser.error("option --timeout: Unparseable time")
661
try:
662
options.interval = string_to_delta(options.interval)
663
except ValueError:
664
parser.error("option --interval: Unparseable time")
665
666
# Parse config file
667
defaults = { "checker": "fping -q -- %%(fqdn)s" }
668
client_config = ConfigParser.SafeConfigParser(defaults)
669
#client_config.readfp(open("global.conf"), "global.conf")
670
client_config.read("mandos-clients.conf")
740
671
741
672
global main_loop
742
673
global bus
750
681
avahi.DBUS_INTERFACE_SERVER )
751
682
# End of Avahi example code
752
683
684
debug = options.debug
685
753
686
if debug:
754
687
console = logging.StreamHandler()
755
688
# console.setLevel(logging.DEBUG)
762
695
def remove_from_clients(client):
763
696
clients.remove(client)
764
697
if not clients:
765
logger.critical(u"No clients left, exiting")
766
sys.exit()
698
logger.debug(u"No clients left, exiting")
699
killme()
767
700
768
clients.update(Set(Client(name = section,
701
clients.update(Set(Client(name=section, options=options,
769
702
stop_hook = remove_from_clients,
770
config
771
= dict(client_config.items(section)))
703
**(dict(client_config\
704
.items(section))))
772
705
for section in client_config.sections()))
773
if not clients:
774
logger.critical(u"No clients defined")
775
sys.exit(1)
776
706
777
707
if not debug:
778
daemon()
779
780
pidfilename = "/var/run/mandos/mandos.pid"
781
pid = os.getpid()
782
try:
783
pidfile = open(pidfilename, "w")
784
pidfile.write(str(pid) + "\n")
785
pidfile.close()
786
del pidfile
787
except IOError, err:
788
logger.error(u"Could not write %s file with PID %d",
789
pidfilename, os.getpid())
708
daemon(False, False)
790
709
791
710
def cleanup():
792
711
"Cleanup function; run on exit"
806
725
807
726
if not debug:
808
727
signal.signal(signal.SIGINT, signal.SIG_IGN)
809
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
810
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
728
signal.signal(signal.SIGHUP, lambda signum, frame: killme())
729
signal.signal(signal.SIGTERM, lambda signum, frame: killme())
811
730
812
731
for client in clients:
813
732
client.start()
814
733
815
tcp_server = IPv6_TCPServer((server_settings["address"],
816
server_settings["port"]),
734
tcp_server = IPv6_TCPServer((options.address, options.port),
817
735
tcp_handler,
818
settings=server_settings,
736
options=options,
819
737
clients=clients)
820
# Find out what port we got
821
service.port = tcp_server.socket.getsockname()[1]
822
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
823
u" scope_id %d" % tcp_server.socket.getsockname())
824
825
#service.interface = tcp_server.socket.getsockname()[3]
826
827
try:
828
# From the Avahi example code
829
server.connect_to_signal("StateChanged", server_state_changed)
830
try:
831
server_state_changed(server.GetState())
832
except dbus.exceptions.DBusException, error:
833
logger.critical(u"DBusException: %s", error)
834
sys.exit(1)
835
# End of Avahi example code
836
837
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
838
lambda *args, **kwargs:
839
tcp_server.handle_request\
840
(*args[2:], **kwargs) or True)
841
842
logger.debug(u"Starting main loop")
738
# Find out what random port we got
739
global servicePort
740
servicePort = tcp_server.socket.getsockname()[1]
741
logger.debug(u"Now listening on port %d", servicePort)
742
743
if options.interface is not None:
744
global serviceInterface
745
serviceInterface = if_nametoindex(options.interface)
746
747
# From the Avahi example code
748
server.connect_to_signal("StateChanged", server_state_changed)
749
try:
750
server_state_changed(server.GetState())
751
except dbus.exceptions.DBusException, error:
752
logger.critical(u"DBusException: %s", error)
753
killme(1)
754
# End of Avahi example code
755
756
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
757
lambda *args, **kwargs:
758
tcp_server.handle_request(*args[2:],
759
**kwargs) or True)
760
try:
761
logger.debug("Starting main loop")
843
762
main_loop_started = True
844
763
main_loop.run()
845
except AvahiError, error:
846
logger.critical(u"AvahiError: %s" + unicode(error))
847
sys.exit(1)
848
764
except KeyboardInterrupt:
849
765
if debug:
850
766
print
767
768
sys.exit(exitstatus)
851
769
852
770
if __name__ == '__main__':
853
771
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0