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- Committer: Teddy Hogeborn
- Date: 2008-07-22 06:25:35 UTC
- mfrom: (24.1.2 mandos)
- Revision ID: teddy@fukt.bsnet.se-20080722062535-whz5do0b3dzw6m08
Merge.
- files added:
- ca.pem
- files removed:
- COPYING
- files renamed:
- clients.conf => mandos-clients.conf
- plugin-runner.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.
15
15
#
16
16
# 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
64
version = "1.0"
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
65
76
66
77
logger = logging.Logger('mandos')
67
78
syslogger = logging.handlers.SysLogHandler\
68
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
69
address = "/dev/log")
79
(facility = logging.handlers.SysLogHandler.LOG_DAEMON)
70
80
syslogger.setFormatter(logging.Formatter\
71
('Mandos: %(levelname)s: %(message)s'))
81
('%(levelname)s: %(message)s'))
72
82
logger.addHandler(syslogger)
73
74
console = logging.StreamHandler()
75
console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
76
' %(message)s'))
77
logger.addHandler(console)
78
79
class AvahiError(Exception):
80
def __init__(self, value):
81
self.value = value
82
def __str__(self):
83
return repr(self.value)
84
85
class AvahiServiceError(AvahiError):
86
pass
87
88
class AvahiGroupError(AvahiError):
89
pass
90
91
92
class AvahiService(object):
93
"""An Avahi (Zeroconf) service.
94
Attributes:
95
interface: integer; avahi.IF_UNSPEC or an interface index.
96
Used to optionally bind to the specified interface.
97
name: string; Example: 'Mandos'
98
type: string; Example: '_mandos._tcp'.
99
See <http://www.dns-sd.org/ServiceTypes.html>
100
port: integer; what port to announce
101
TXT: list of strings; TXT record for the service
102
domain: string; Domain to publish on, default to .local if empty.
103
host: string; Host to publish records for, default is localhost
104
max_renames: integer; maximum number of renames
105
rename_count: integer; counter so we only rename after collisions
106
a sensible number of times
107
"""
108
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
109
type = None, port = None, TXT = None, domain = "",
110
host = "", max_renames = 32768):
111
self.interface = interface
112
self.name = name
113
self.type = type
114
self.port = port
115
if TXT is None:
116
self.TXT = []
117
else:
118
self.TXT = TXT
119
self.domain = domain
120
self.host = host
121
self.rename_count = 0
122
self.max_renames = max_renames
123
def rename(self):
124
"""Derived from the Avahi example code"""
125
if self.rename_count >= self.max_renames:
126
logger.critical(u"No suitable service name found after %i"
127
u" retries, exiting.", rename_count)
128
raise AvahiServiceError("Too many renames")
129
self.name = server.GetAlternativeServiceName(self.name)
130
logger.info(u"Changing name to %r ...", str(self.name))
131
syslogger.setFormatter(logging.Formatter\
132
('Mandos (%s): %%(levelname)s:'
133
' %%(message)s' % self.name))
134
self.remove()
135
self.add()
136
self.rename_count += 1
137
def remove(self):
138
"""Derived from the Avahi example code"""
139
if group is not None:
140
group.Reset()
141
def add(self):
142
"""Derived from the Avahi example code"""
143
global group
144
if group is None:
145
group = dbus.Interface\
146
(bus.get_object(avahi.DBUS_NAME,
147
server.EntryGroupNew()),
148
avahi.DBUS_INTERFACE_ENTRY_GROUP)
149
group.connect_to_signal('StateChanged',
150
entry_group_state_changed)
151
logger.debug(u"Adding service '%s' of type '%s' ...",
152
service.name, service.type)
153
group.AddService(
154
self.interface, # interface
155
avahi.PROTO_INET6, # protocol
156
dbus.UInt32(0), # flags
157
self.name, self.type,
158
self.domain, self.host,
159
dbus.UInt16(self.port),
160
avahi.string_array_to_txt_array(self.TXT))
161
group.Commit()
162
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
163
89
# From the Avahi example code:
164
group = None # our entry group
90
serviceName = None
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
165
99
# End of Avahi example code
166
100
167
101
172
106
fingerprint: string (40 or 32 hexadecimal digits); used to
173
107
uniquely identify the client
174
108
secret: bytestring; sent verbatim (over TLS) to client
175
host: string; available for use by the checker command
176
created: datetime.datetime(); object creation, not client host
177
last_checked_ok: datetime.datetime() or None if not yet checked OK
178
timeout: datetime.timedelta(); How long from last_checked_ok
179
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
180
114
interval: datetime.timedelta(); How often to start a new checker
181
115
stop_hook: If set, called by stop() as stop_hook(self)
182
116
checker: subprocess.Popen(); a running checker process used
183
117
to see if the client lives.
184
'None' if no process is running.
118
Is None if no process is running.
185
119
checker_initiator_tag: a gobject event source tag, or None
186
120
stop_initiator_tag: - '' -
187
121
checker_callback_tag: - '' -
188
122
checker_command: string; External command which is run to check if
189
client lives. %() expansions are done at
123
client lives. %()s expansions are done at
190
124
runtime with vars(self) as dict, so that for
191
125
instance %(name)s can be used in the command.
192
126
Private attibutes:
193
127
_timeout: Real variable for 'timeout'
194
128
_interval: Real variable for 'interval'
195
_timeout_milliseconds: Used when calling gobject.timeout_add()
129
_timeout_milliseconds: Used by gobject.timeout_add()
196
130
_interval_milliseconds: - '' -
197
131
"""
198
132
def _set_timeout(self, timeout):
218
152
interval = property(lambda self: self._interval,
219
153
_set_interval)
220
154
del _set_interval
221
def __init__(self, name = None, stop_hook=None, config={}):
222
"""Note: the 'checker' key in 'config' sets the
223
'checker_command' attribute and *not* the 'checker'
224
attribute."""
155
def __init__(self, name=None, stop_hook=None, fingerprint=None,
156
secret=None, secfile=None, fqdn=None, timeout=None,
157
interval=-1, checker=None):
158
"""Note: the 'checker' argument sets the 'checker_command'
159
attribute and not the 'checker' attribute.."""
225
160
self.name = name
226
161
logger.debug(u"Creating client %r", self.name)
227
# Uppercase and remove spaces from fingerprint for later
228
# comparison purposes with return value from the fingerprint()
229
# function
230
self.fingerprint = config["fingerprint"].upper()\
231
.replace(u" ", u"")
162
# Uppercase and remove spaces from fingerprint
163
# for later comparison purposes with return value of
164
# the fingerprint() function
165
self.fingerprint = fingerprint.upper().replace(u" ", u"")
232
166
logger.debug(u" Fingerprint: %s", self.fingerprint)
233
if "secret" in config:
234
self.secret = config["secret"].decode(u"base64")
235
elif "secfile" in config:
236
sf = open(config["secfile"])
167
if secret:
168
self.secret = secret.decode(u"base64")
169
elif secfile:
170
sf = open(secfile)
237
171
self.secret = sf.read()
238
172
sf.close()
239
173
else:
240
raise TypeError(u"No secret or secfile for client %s"
241
% self.name)
242
self.host = config.get("host", "")
174
raise RuntimeError(u"No secret or secfile for client %s"
175
% self.name)
176
self.fqdn = fqdn # string
243
177
self.created = datetime.datetime.now()
244
self.last_checked_ok = None
245
self.timeout = string_to_delta(config["timeout"])
246
self.interval = string_to_delta(config["interval"])
178
self.last_seen = None
179
self.timeout = string_to_delta(timeout)
180
self.interval = string_to_delta(interval)
247
181
self.stop_hook = stop_hook
248
182
self.checker = None
249
183
self.checker_initiator_tag = None
250
184
self.stop_initiator_tag = None
251
185
self.checker_callback_tag = None
252
self.check_command = config["checker"]
186
self.check_command = checker
253
187
def start(self):
254
188
"""Start this client's checker and timeout hooks"""
255
189
# Schedule a new checker to be started an 'interval' from now,
265
199
self.stop)
266
200
def stop(self):
267
201
"""Stop this client.
268
The possibility that a client might be restarted is left open,
269
but not currently used."""
202
The possibility that this client might be restarted is left
203
open, but not currently used."""
270
204
# If this client doesn't have a secret, it is already stopped.
271
if hasattr(self, "secret") and self.secret:
272
logger.info(u"Stopping client %s", self.name)
205
if self.secret:
206
logger.debug(u"Stopping client %s", self.name)
273
207
self.secret = None
274
208
else:
275
209
return False
276
if getattr(self, "stop_initiator_tag", False):
210
if hasattr(self, "stop_initiator_tag") \
211
and self.stop_initiator_tag:
277
212
gobject.source_remove(self.stop_initiator_tag)
278
213
self.stop_initiator_tag = None
279
if getattr(self, "checker_initiator_tag", False):
214
if hasattr(self, "checker_initiator_tag") \
215
and self.checker_initiator_tag:
280
216
gobject.source_remove(self.checker_initiator_tag)
281
217
self.checker_initiator_tag = None
282
218
self.stop_checker()
294
230
self.checker = None
295
231
if os.WIFEXITED(condition) \
296
232
and (os.WEXITSTATUS(condition) == 0):
297
logger.info(u"Checker for %(name)s succeeded",
298
vars(self))
299
self.last_checked_ok = now
233
logger.debug(u"Checker for %(name)s succeeded",
234
vars(self))
235
self.last_seen = now
300
236
gobject.source_remove(self.stop_initiator_tag)
301
237
self.stop_initiator_tag = gobject.timeout_add\
302
238
(self._timeout_milliseconds,
305
241
logger.warning(u"Checker for %(name)s crashed?",
306
242
vars(self))
307
243
else:
308
logger.info(u"Checker for %(name)s failed",
309
vars(self))
244
logger.debug(u"Checker for %(name)s failed",
245
vars(self))
310
246
def start_checker(self):
311
247
"""Start a new checker subprocess if one is not running.
312
248
If a checker already exists, leave it running and do
321
257
# is as it should be.
322
258
if self.checker is None:
323
259
try:
324
# In case check_command has exactly one % operator
325
command = self.check_command % self.host
260
command = self.check_command % self.fqdn
326
261
except TypeError:
327
# Escape attributes for the shell
328
262
escaped_attrs = dict((key, re.escape(str(val)))
329
263
for key, val in
330
264
vars(self).iteritems())
331
265
try:
332
266
command = self.check_command % escaped_attrs
333
267
except TypeError, error:
334
logger.error(u'Could not format string "%s":'
335
u' %s', self.check_command, error)
268
logger.critical(u'Could not format string "%s":'
269
u' %s', self.check_command, error)
336
270
return True # Try again later
337
271
try:
338
logger.info(u"Starting checker %r for %s",
339
command, self.name)
340
self.checker = subprocess.Popen(command,
341
close_fds=True,
342
shell=True, cwd="/")
272
logger.debug(u"Starting checker %r for %s",
273
command, self.name)
274
self.checker = subprocess.\
275
Popen(command,
276
close_fds=True, shell=True,
277
cwd="/")
343
278
self.checker_callback_tag = gobject.child_watch_add\
344
279
(self.checker.pid,
345
280
self.checker_callback)
353
288
if self.checker_callback_tag:
354
289
gobject.source_remove(self.checker_callback_tag)
355
290
self.checker_callback_tag = None
356
if getattr(self, "checker", None) is None:
291
if not hasattr(self, "checker") or self.checker is None:
357
292
return
358
logger.debug(u"Stopping checker for %(name)s", vars(self))
293
logger.debug("Stopping checker for %(name)s", vars(self))
359
294
try:
360
295
os.kill(self.checker.pid, signal.SIGTERM)
361
296
#os.sleep(0.5)
362
297
#if self.checker.poll() is None:
363
298
# os.kill(self.checker.pid, signal.SIGKILL)
364
299
except OSError, error:
365
if error.errno != errno.ESRCH: # No such process
300
if error.errno != errno.ESRCH:
366
301
raise
367
302
self.checker = None
368
def still_valid(self):
303
def still_valid(self, now=None):
369
304
"""Has the timeout not yet passed for this client?"""
370
now = datetime.datetime.now()
371
if self.last_checked_ok is None:
305
if now is None:
306
now = datetime.datetime.now()
307
if self.last_seen is None:
372
308
return now < (self.created + self.timeout)
373
309
else:
374
return now < (self.last_checked_ok + self.timeout)
310
return now < (self.last_seen + self.timeout)
375
311
376
312
377
313
def peer_certificate(session):
393
329
394
330
def fingerprint(openpgp):
395
331
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
332
# New empty GnuTLS certificate
333
crt = gnutls.library.types.gnutls_openpgp_crt_t()
334
gnutls.library.functions.gnutls_openpgp_crt_init\
335
(ctypes.byref(crt))
396
336
# New GnuTLS "datum" with the OpenPGP public key
397
337
datum = gnutls.library.types.gnutls_datum_t\
398
338
(ctypes.cast(ctypes.c_char_p(openpgp),
399
339
ctypes.POINTER(ctypes.c_ubyte)),
400
340
ctypes.c_uint(len(openpgp)))
401
# New empty GnuTLS certificate
402
crt = gnutls.library.types.gnutls_openpgp_crt_t()
403
gnutls.library.functions.gnutls_openpgp_crt_init\
404
(ctypes.byref(crt))
405
341
# Import the OpenPGP public key into the certificate
406
gnutls.library.functions.gnutls_openpgp_crt_import\
407
(crt, ctypes.byref(datum),
408
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
342
ret = gnutls.library.functions.gnutls_openpgp_crt_import\
343
(crt,
344
ctypes.byref(datum),
345
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
409
346
# New buffer for the fingerprint
410
347
buffer = ctypes.create_string_buffer(20)
411
348
buffer_length = ctypes.c_size_t()
427
364
Note: This will run in its own forked process."""
428
365
429
366
def handle(self):
430
logger.info(u"TCP connection from: %s",
367
logger.debug(u"TCP connection from: %s",
431
368
unicode(self.client_address))
432
session = gnutls.connection.ClientSession\
433
(self.request, gnutls.connection.X509Credentials())
434
435
line = self.request.makefile().readline()
436
logger.debug(u"Protocol version: %r", line)
437
try:
438
if int(line.strip().split()[0]) > 1:
439
raise RuntimeError
440
except (ValueError, IndexError, RuntimeError), error:
441
logger.error(u"Unknown protocol version: %s", error)
442
return
443
444
# Note: gnutls.connection.X509Credentials is really a generic
445
# GnuTLS certificate credentials object so long as no X.509
446
# keys are added to it. Therefore, we can use it here despite
447
# using OpenPGP certificates.
369
session = gnutls.connection.ClientSession(self.request,
370
gnutls.connection.\
371
X509Credentials())
448
372
449
373
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
450
374
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
451
375
# "+DHE-DSS"))
452
priority = "NORMAL" # Fallback default, since this
453
# MUST be set.
454
if self.server.settings["priority"]:
455
priority = self.server.settings["priority"]
376
priority = "NORMAL"
377
if self.server.options.priority:
378
priority = self.server.options.priority
456
379
gnutls.library.functions.gnutls_priority_set_direct\
457
380
(session._c_object, priority, None);
458
381
459
382
try:
460
383
session.handshake()
461
384
except gnutls.errors.GNUTLSError, error:
462
logger.warning(u"Handshake failed: %s", error)
385
logger.debug(u"Handshake failed: %s", error)
463
386
# Do not run session.bye() here: the session is not
464
387
# established. Just abandon the request.
465
388
return
466
389
try:
467
390
fpr = fingerprint(peer_certificate(session))
468
391
except (TypeError, gnutls.errors.GNUTLSError), error:
469
logger.warning(u"Bad certificate: %s", error)
392
logger.debug(u"Bad certificate: %s", error)
470
393
session.bye()
471
394
return
472
395
logger.debug(u"Fingerprint: %s", fpr)
475
398
if c.fingerprint == fpr:
476
399
client = c
477
400
break
478
if not client:
479
logger.warning(u"Client not found for fingerprint: %s",
480
fpr)
481
session.bye()
482
return
483
401
# Have to check if client.still_valid(), since it is possible
484
402
# that the client timed out while establishing the GnuTLS
485
403
# session.
486
if not client.still_valid():
487
logger.warning(u"Client %(name)s is invalid",
488
vars(client))
404
if (not client) or (not client.still_valid()):
405
if client:
406
logger.debug(u"Client %(name)s is invalid",
407
vars(client))
408
else:
409
logger.debug(u"Client not found for fingerprint: %s",
410
fpr)
489
411
session.bye()
490
412
return
491
413
sent_size = 0
501
423
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
502
424
"""IPv6 TCP server. Accepts 'None' as address and/or port.
503
425
Attributes:
504
settings: Server settings
426
options: Command line options
505
427
clients: Set() of Client objects
506
428
"""
507
429
address_family = socket.AF_INET6
508
430
def __init__(self, *args, **kwargs):
509
if "settings" in kwargs:
510
self.settings = kwargs["settings"]
511
del kwargs["settings"]
431
if "options" in kwargs:
432
self.options = kwargs["options"]
433
del kwargs["options"]
512
434
if "clients" in kwargs:
513
435
self.clients = kwargs["clients"]
514
436
del kwargs["clients"]
517
439
"""This overrides the normal server_bind() function
518
440
to bind to an interface if one was specified, and also NOT to
519
441
bind to an address or port if they were not specified."""
520
if self.settings["interface"]:
521
# 25 is from /usr/include/asm-i486/socket.h
522
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
442
if self.options.interface:
443
if not hasattr(socket, "SO_BINDTODEVICE"):
444
# From /usr/include/asm-i486/socket.h
445
socket.SO_BINDTODEVICE = 25
523
446
try:
524
447
self.socket.setsockopt(socket.SOL_SOCKET,
525
SO_BINDTODEVICE,
526
self.settings["interface"])
448
socket.SO_BINDTODEVICE,
449
self.options.interface)
527
450
except socket.error, error:
528
451
if error[0] == errno.EPERM:
529
logger.error(u"No permission to"
530
u" bind to interface %s",
531
self.settings["interface"])
452
logger.warning(u"No permission to"
453
u" bind to interface %s",
454
self.options.interface)
532
455
else:
533
456
raise error
534
457
# Only bind(2) the socket if we really need to.
537
460
in6addr_any = "::"
538
461
self.server_address = (in6addr_any,
539
462
self.server_address[1])
540
elif not self.server_address[1]:
463
elif self.server_address[1] is None:
541
464
self.server_address = (self.server_address[0],
542
465
0)
543
# if self.settings["interface"]:
544
# self.server_address = (self.server_address[0],
545
# 0, # port
546
# 0, # flowinfo
547
# if_nametoindex
548
# (self.settings
549
# ["interface"]))
550
466
return super(type(self), self).server_bind()
551
467
552
468
584
500
return delta
585
501
586
502
503
def add_service():
504
"""Derived from the Avahi example code"""
505
global group, serviceName, serviceType, servicePort, serviceTXT, \
506
domain, host
507
if group is None:
508
group = dbus.Interface(
509
bus.get_object( avahi.DBUS_NAME,
510
server.EntryGroupNew()),
511
avahi.DBUS_INTERFACE_ENTRY_GROUP)
512
group.connect_to_signal('StateChanged',
513
entry_group_state_changed)
514
logger.debug(u"Adding service '%s' of type '%s' ...",
515
serviceName, serviceType)
516
517
group.AddService(
518
serviceInterface, # interface
519
avahi.PROTO_INET6, # protocol
520
dbus.UInt32(0), # flags
521
serviceName, serviceType,
522
domain, host,
523
dbus.UInt16(servicePort),
524
avahi.string_array_to_txt_array(serviceTXT))
525
group.Commit()
526
527
528
def remove_service():
529
"""From the Avahi example code"""
530
global group
531
532
if not group is None:
533
group.Reset()
534
535
587
536
def server_state_changed(state):
588
537
"""Derived from the Avahi example code"""
589
538
if state == avahi.SERVER_COLLISION:
590
logger.error(u"Server name collision")
591
service.remove()
539
logger.warning(u"Server name collision")
540
remove_service()
592
541
elif state == avahi.SERVER_RUNNING:
593
service.add()
542
add_service()
594
543
595
544
596
545
def entry_group_state_changed(state, error):
597
546
"""Derived from the Avahi example code"""
547
global serviceName, server, rename_count
548
598
549
logger.debug(u"state change: %i", state)
599
550
600
551
if state == avahi.ENTRY_GROUP_ESTABLISHED:
601
552
logger.debug(u"Service established.")
602
553
elif state == avahi.ENTRY_GROUP_COLLISION:
603
logger.warning(u"Service name collision.")
604
service.rename()
554
555
rename_count = rename_count - 1
556
if rename_count > 0:
557
name = server.GetAlternativeServiceName(name)
558
logger.warning(u"Service name collision, "
559
u"changing name to '%s' ...", name)
560
remove_service()
561
add_service()
562
563
else:
564
logger.error(u"No suitable service name found after %i"
565
u" retries, exiting.", n_rename)
566
killme(1)
605
567
elif state == avahi.ENTRY_GROUP_FAILURE:
606
logger.critical(u"Error in group state changed %s",
607
unicode(error))
608
raise AvahiGroupError("State changed: %s", str(error))
568
logger.error(u"Error in group state changed %s",
569
unicode(error))
570
killme(1)
571
609
572
610
573
def if_nametoindex(interface):
611
"""Call the C function if_nametoindex(), or equivalent"""
612
global if_nametoindex
574
"""Call the C function if_nametoindex()"""
613
575
try:
614
if "ctypes.util" not in sys.modules:
615
import ctypes.util
616
if_nametoindex = ctypes.cdll.LoadLibrary\
617
(ctypes.util.find_library("c")).if_nametoindex
576
libc = ctypes.cdll.LoadLibrary("libc.so.6")
577
return libc.if_nametoindex(interface)
618
578
except (OSError, AttributeError):
619
579
if "struct" not in sys.modules:
620
580
import struct
621
581
if "fcntl" not in sys.modules:
622
582
import fcntl
623
def if_nametoindex(interface):
624
"Get an interface index the hard way, i.e. using fcntl()"
625
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
626
s = socket.socket()
627
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
628
struct.pack("16s16x", interface))
629
s.close()
630
interface_index = struct.unpack("I", ifreq[16:20])[0]
631
return interface_index
632
return if_nametoindex(interface)
633
634
635
def daemon(nochdir = False, noclose = False):
583
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
584
s = socket.socket()
585
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
586
struct.pack("16s16x", interface))
587
s.close()
588
interface_index = struct.unpack("I", ifreq[16:20])[0]
589
return interface_index
590
591
592
def daemon(nochdir, noclose):
636
593
"""See daemon(3). Standard BSD Unix function.
637
594
This should really exist as os.daemon, but it doesn't (yet)."""
638
595
if os.fork():
640
597
os.setsid()
641
598
if not nochdir:
642
599
os.chdir("/")
643
if os.fork():
644
sys.exit()
645
600
if not noclose:
646
601
# Close all standard open file descriptors
647
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
602
null = os.open("/dev/null", os.O_NOCTTY | os.O_RDWR)
648
603
if not stat.S_ISCHR(os.fstat(null).st_mode):
649
604
raise OSError(errno.ENODEV,
650
605
"/dev/null not a character device")
655
610
os.close(null)
656
611
657
612
613
def killme(status = 0):
614
logger.debug("Stopping server with exit status %d", status)
615
exitstatus = status
616
if main_loop_started:
617
main_loop.quit()
618
else:
619
sys.exit(status)
620
621
658
622
def main():
623
global exitstatus
624
exitstatus = 0
659
625
global main_loop_started
660
626
main_loop_started = False
661
627
662
parser = OptionParser(version = "%%prog %s" % version)
628
parser = OptionParser()
663
629
parser.add_option("-i", "--interface", type="string",
664
metavar="IF", help="Bind to interface IF")
665
parser.add_option("-a", "--address", type="string",
630
default=None, metavar="IF",
631
help="Bind to interface IF")
632
parser.add_option("-a", "--address", type="string", default=None,
666
633
help="Address to listen for requests on")
667
parser.add_option("-p", "--port", type="int",
634
parser.add_option("-p", "--port", type="int", default=None,
668
635
help="Port number to receive requests on")
669
636
parser.add_option("--check", action="store_true", default=False,
670
637
help="Run self-test")
671
parser.add_option("--debug", action="store_true",
672
help="Debug mode; run in foreground and log to"
673
" terminal")
674
parser.add_option("--priority", type="string", help="GnuTLS"
675
" priority string (see GnuTLS documentation)")
676
parser.add_option("--servicename", type="string", metavar="NAME",
677
help="Zeroconf service name")
678
parser.add_option("--configdir", type="string",
679
default="/etc/mandos", metavar="DIR",
680
help="Directory to search for configuration"
681
" files")
638
parser.add_option("--debug", action="store_true", default=False,
639
help="Debug mode")
640
parser.add_option("--priority", type="string",
641
default="SECURE256",
642
help="GnuTLS priority string"
643
" (see GnuTLS documentation)")
644
parser.add_option("--servicename", type="string",
645
default="Mandos", help="Zeroconf service name")
682
646
(options, args) = parser.parse_args()
683
647
684
648
if options.check:
686
650
doctest.testmod()
687
651
sys.exit()
688
652
689
# Default values for config file for server-global settings
690
server_defaults = { "interface": "",
691
"address": "",
692
"port": "",
693
"debug": "False",
694
"priority":
695
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
696
"servicename": "Mandos",
697
}
698
699
# Parse config file for server-global settings
700
server_config = ConfigParser.SafeConfigParser(server_defaults)
701
del server_defaults
702
server_config.read(os.path.join(options.configdir, "mandos.conf"))
703
server_section = "server"
704
# Convert the SafeConfigParser object to a dict
705
server_settings = dict(server_config.items(server_section))
706
# Use getboolean on the boolean config option
707
server_settings["debug"] = server_config.getboolean\
708
(server_section, "debug")
709
del server_config
710
711
# Override the settings from the config file with command line
712
# options, if set.
713
for option in ("interface", "address", "port", "debug",
714
"priority", "servicename", "configdir"):
715
value = getattr(options, option)
716
if value is not None:
717
server_settings[option] = value
718
del options
719
# Now we have our good server settings in "server_settings"
720
721
debug = server_settings["debug"]
722
723
if not debug:
724
syslogger.setLevel(logging.WARNING)
725
console.setLevel(logging.WARNING)
726
727
if server_settings["servicename"] != "Mandos":
728
syslogger.setFormatter(logging.Formatter\
729
('Mandos (%s): %%(levelname)s:'
730
' %%(message)s'
731
% server_settings["servicename"]))
732
733
# Parse config file with clients
734
client_defaults = { "timeout": "1h",
735
"interval": "5m",
736
"checker": "fping -q -- %%(host)s",
737
}
738
client_config = ConfigParser.SafeConfigParser(client_defaults)
739
client_config.read(os.path.join(server_settings["configdir"],
740
"clients.conf"))
741
742
global service
743
service = AvahiService(name = server_settings["servicename"],
744
type = "_mandos._tcp", );
745
if server_settings["interface"]:
746
service.interface = if_nametoindex(server_settings["interface"])
653
# Parse config file
654
defaults = { "timeout": "1h",
655
"interval": "5m",
656
"checker": "fping -q -- %%(fqdn)s",
657
}
658
client_config = ConfigParser.SafeConfigParser(defaults)
659
#client_config.readfp(open("global.conf"), "global.conf")
660
client_config.read("mandos-clients.conf")
661
662
global serviceName
663
serviceName = options.servicename;
747
664
748
665
global main_loop
749
666
global bus
757
674
avahi.DBUS_INTERFACE_SERVER )
758
675
# End of Avahi example code
759
676
677
debug = options.debug
678
679
if debug:
680
console = logging.StreamHandler()
681
# console.setLevel(logging.DEBUG)
682
console.setFormatter(logging.Formatter\
683
('%(levelname)s: %(message)s'))
684
logger.addHandler(console)
685
del console
686
760
687
clients = Set()
761
688
def remove_from_clients(client):
762
689
clients.remove(client)
763
690
if not clients:
764
logger.critical(u"No clients left, exiting")
765
sys.exit()
691
logger.debug(u"No clients left, exiting")
692
killme()
766
693
767
clients.update(Set(Client(name = section,
694
clients.update(Set(Client(name=section,
768
695
stop_hook = remove_from_clients,
769
config
770
= dict(client_config.items(section)))
696
**(dict(client_config\
697
.items(section))))
771
698
for section in client_config.sections()))
772
if not clients:
773
logger.critical(u"No clients defined")
774
sys.exit(1)
775
699
776
700
if not debug:
777
logger.removeHandler(console)
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())
701
daemon(False, False)
790
702
791
703
def cleanup():
792
704
"Cleanup function; run on exit"
806
718
807
719
if not debug:
808
720
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())
721
signal.signal(signal.SIGHUP, lambda signum, frame: killme())
722
signal.signal(signal.SIGTERM, lambda signum, frame: killme())
811
723
812
724
for client in clients:
813
725
client.start()
814
726
815
tcp_server = IPv6_TCPServer((server_settings["address"],
816
server_settings["port"]),
727
tcp_server = IPv6_TCPServer((options.address, options.port),
817
728
tcp_handler,
818
settings=server_settings,
729
options=options,
819
730
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")
731
# Find out what random port we got
732
global servicePort
733
servicePort = tcp_server.socket.getsockname()[1]
734
logger.debug(u"Now listening on port %d", servicePort)
735
736
if options.interface is not None:
737
global serviceInterface
738
serviceInterface = if_nametoindex(options.interface)
739
740
# From the Avahi example code
741
server.connect_to_signal("StateChanged", server_state_changed)
742
try:
743
server_state_changed(server.GetState())
744
except dbus.exceptions.DBusException, error:
745
logger.critical(u"DBusException: %s", error)
746
killme(1)
747
# End of Avahi example code
748
749
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
750
lambda *args, **kwargs:
751
tcp_server.handle_request(*args[2:],
752
**kwargs) or True)
753
try:
754
logger.debug("Starting main loop")
843
755
main_loop_started = True
844
756
main_loop.run()
845
except AvahiError, error:
846
logger.critical(u"AvahiError: %s" + unicode(error))
847
sys.exit(1)
848
757
except KeyboardInterrupt:
849
758
if debug:
850
759
print
760
761
sys.exit(exitstatus)
851
762
852
763
if __name__ == '__main__':
853
764
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0