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- Committer: Teddy Hogeborn
- Date: 2008-09-23 18:52:33 UTC
- Revision ID: teddy@fukt.bsnet.se-20080923185233-a6zir2neltxk2qvd
* debian/mandos-client.lintian-overrides: Ignore setuid
"plugins.d/splashy".
"plugins.d/splashy".
- files added:
- .bzr-builddeb
- debian
- debian/po
- 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
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
# following functions: "add_service", "remove_service",
10
# "server_state_changed", "entry_group_state_changed", and some lines
11
# in "main".
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
12
#
13
# Everything else is Copyright © 2007-2008 Teddy Hogeborn and Björn
14
# Påhlsson.
13
# Everything else is
14
# Copyright © 2008 Teddy Hogeborn & Björn 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
24
24
# GNU General Public License for more details.
25
25
#
26
26
# You should have received a copy of the GNU General Public License
27
# along with this program. If not, see <http://www.gnu.org/licenses/>.
27
# along with this program. If not, see
28
# <http://www.gnu.org/licenses/>.
28
29
#
29
# Contact the authors at <https://www.fukt.bsnet.se/~belorn/> and
30
# <https://www.fukt.bsnet.se/~teddy/>.
30
# Contact the authors at <mandos@fukt.bsnet.se>.
31
31
#
32
32
33
33
from __future__ import division
55
55
import stat
56
56
import logging
57
57
import logging.handlers
58
import pwd
58
59
59
60
import dbus
60
61
import gobject
62
63
from dbus.mainloop.glib import DBusGMainLoop
63
64
import ctypes
64
65
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
66
version = "1.0"
76
67
77
68
logger = logging.Logger('mandos')
78
69
syslogger = logging.handlers.SysLogHandler\
79
(facility = logging.handlers.SysLogHandler.LOG_DAEMON)
70
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
71
address = "/dev/log")
80
72
syslogger.setFormatter(logging.Formatter\
81
('%(levelname)s: %(message)s'))
73
('Mandos: %(levelname)s: %(message)s'))
82
74
logger.addHandler(syslogger)
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
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
89
167
# From the Avahi example code:
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
168
group = None # our entry group
99
169
# End of Avahi example code
100
170
101
171
106
176
fingerprint: string (40 or 32 hexadecimal digits); used to
107
177
uniquely identify the client
108
178
secret: bytestring; sent verbatim (over TLS) to client
109
fqdn: string (FQDN); available for use by the checker command
110
created: datetime.datetime()
111
last_seen: datetime.datetime() or None if not yet seen
112
timeout: datetime.timedelta(); How long from last_seen until
113
this client is invalid
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
114
184
interval: datetime.timedelta(); How often to start a new checker
115
185
stop_hook: If set, called by stop() as stop_hook(self)
116
186
checker: subprocess.Popen(); a running checker process used
117
187
to see if the client lives.
118
Is None if no process is running.
188
'None' if no process is running.
119
189
checker_initiator_tag: a gobject event source tag, or None
120
190
stop_initiator_tag: - '' -
121
191
checker_callback_tag: - '' -
122
192
checker_command: string; External command which is run to check if
123
client lives. %()s expansions are done at
193
client lives. %() expansions are done at
124
194
runtime with vars(self) as dict, so that for
125
195
instance %(name)s can be used in the command.
126
196
Private attibutes:
127
197
_timeout: Real variable for 'timeout'
128
198
_interval: Real variable for 'interval'
129
_timeout_milliseconds: Used by gobject.timeout_add()
199
_timeout_milliseconds: Used when calling gobject.timeout_add()
130
200
_interval_milliseconds: - '' -
131
201
"""
132
202
def _set_timeout(self, timeout):
152
222
interval = property(lambda self: self._interval,
153
223
_set_interval)
154
224
del _set_interval
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
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."""
160
229
self.name = name
161
230
logger.debug(u"Creating client %r", self.name)
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"")
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"")
166
236
logger.debug(u" Fingerprint: %s", self.fingerprint)
167
if secret:
168
self.secret = secret.decode(u"base64")
169
elif secfile:
170
sf = open(secfile)
237
if "secret" in config:
238
self.secret = config["secret"].decode(u"base64")
239
elif "secfile" in config:
240
sf = open(config["secfile"])
171
241
self.secret = sf.read()
172
242
sf.close()
173
243
else:
174
raise RuntimeError(u"No secret or secfile for client %s"
175
% self.name)
176
self.fqdn = fqdn # string
244
raise TypeError(u"No secret or secfile for client %s"
245
% self.name)
246
self.host = config.get("host", "")
177
247
self.created = datetime.datetime.now()
178
self.last_seen = None
179
self.timeout = string_to_delta(timeout)
180
self.interval = string_to_delta(interval)
248
self.last_checked_ok = None
249
self.timeout = string_to_delta(config["timeout"])
250
self.interval = string_to_delta(config["interval"])
181
251
self.stop_hook = stop_hook
182
252
self.checker = None
183
253
self.checker_initiator_tag = None
184
254
self.stop_initiator_tag = None
185
255
self.checker_callback_tag = None
186
self.check_command = checker
256
self.check_command = config["checker"]
187
257
def start(self):
188
258
"""Start this client's checker and timeout hooks"""
189
259
# Schedule a new checker to be started an 'interval' from now,
199
269
self.stop)
200
270
def stop(self):
201
271
"""Stop this client.
202
The possibility that this client might be restarted is left
203
open, but not currently used."""
272
The possibility that a client might be restarted is left open,
273
but not currently used."""
204
274
# If this client doesn't have a secret, it is already stopped.
205
if self.secret:
206
logger.debug(u"Stopping client %s", self.name)
275
if hasattr(self, "secret") and self.secret:
276
logger.info(u"Stopping client %s", self.name)
207
277
self.secret = None
208
278
else:
209
279
return False
210
if hasattr(self, "stop_initiator_tag") \
211
and self.stop_initiator_tag:
280
if getattr(self, "stop_initiator_tag", False):
212
281
gobject.source_remove(self.stop_initiator_tag)
213
282
self.stop_initiator_tag = None
214
if hasattr(self, "checker_initiator_tag") \
215
and self.checker_initiator_tag:
283
if getattr(self, "checker_initiator_tag", False):
216
284
gobject.source_remove(self.checker_initiator_tag)
217
285
self.checker_initiator_tag = None
218
286
self.stop_checker()
230
298
self.checker = None
231
299
if os.WIFEXITED(condition) \
232
300
and (os.WEXITSTATUS(condition) == 0):
233
logger.debug(u"Checker for %(name)s succeeded",
234
vars(self))
235
self.last_seen = now
301
logger.info(u"Checker for %(name)s succeeded",
302
vars(self))
303
self.last_checked_ok = now
236
304
gobject.source_remove(self.stop_initiator_tag)
237
305
self.stop_initiator_tag = gobject.timeout_add\
238
306
(self._timeout_milliseconds,
241
309
logger.warning(u"Checker for %(name)s crashed?",
242
310
vars(self))
243
311
else:
244
logger.debug(u"Checker for %(name)s failed",
245
vars(self))
312
logger.info(u"Checker for %(name)s failed",
313
vars(self))
246
314
def start_checker(self):
247
315
"""Start a new checker subprocess if one is not running.
248
316
If a checker already exists, leave it running and do
257
325
# is as it should be.
258
326
if self.checker is None:
259
327
try:
260
command = self.check_command % self.fqdn
328
# In case check_command has exactly one % operator
329
command = self.check_command % self.host
261
330
except TypeError:
331
# Escape attributes for the shell
262
332
escaped_attrs = dict((key, re.escape(str(val)))
263
333
for key, val in
264
334
vars(self).iteritems())
265
335
try:
266
336
command = self.check_command % escaped_attrs
267
337
except TypeError, error:
268
logger.critical(u'Could not format string "%s":'
269
u' %s', self.check_command, error)
338
logger.error(u'Could not format string "%s":'
339
u' %s', self.check_command, error)
270
340
return True # Try again later
271
341
try:
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="/")
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="/")
278
351
self.checker_callback_tag = gobject.child_watch_add\
279
352
(self.checker.pid,
280
353
self.checker_callback)
281
except subprocess.OSError, error:
354
except OSError, error:
282
355
logger.error(u"Failed to start subprocess: %s",
283
356
error)
284
357
# Re-run this periodically if run by gobject.timeout_add
288
361
if self.checker_callback_tag:
289
362
gobject.source_remove(self.checker_callback_tag)
290
363
self.checker_callback_tag = None
291
if not hasattr(self, "checker") or self.checker is None:
364
if getattr(self, "checker", None) is None:
292
365
return
293
logger.debug("Stopping checker for %(name)s", vars(self))
366
logger.debug(u"Stopping checker for %(name)s", vars(self))
294
367
try:
295
368
os.kill(self.checker.pid, signal.SIGTERM)
296
369
#os.sleep(0.5)
297
370
#if self.checker.poll() is None:
298
371
# os.kill(self.checker.pid, signal.SIGKILL)
299
372
except OSError, error:
300
if error.errno != errno.ESRCH:
373
if error.errno != errno.ESRCH: # No such process
301
374
raise
302
375
self.checker = None
303
def still_valid(self, now=None):
376
def still_valid(self):
304
377
"""Has the timeout not yet passed for this client?"""
305
if now is None:
306
now = datetime.datetime.now()
307
if self.last_seen is None:
378
now = datetime.datetime.now()
379
if self.last_checked_ok is None:
308
380
return now < (self.created + self.timeout)
309
381
else:
310
return now < (self.last_seen + self.timeout)
382
return now < (self.last_checked_ok + self.timeout)
311
383
312
384
313
385
def peer_certificate(session):
329
401
330
402
def fingerprint(openpgp):
331
403
"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))
336
404
# New GnuTLS "datum" with the OpenPGP public key
337
405
datum = gnutls.library.types.gnutls_datum_t\
338
406
(ctypes.cast(ctypes.c_char_p(openpgp),
339
407
ctypes.POINTER(ctypes.c_ubyte)),
340
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))
341
413
# Import the OpenPGP public key into the certificate
342
ret = gnutls.library.functions.gnutls_openpgp_crt_import\
343
(crt,
344
ctypes.byref(datum),
345
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")
346
424
# New buffer for the fingerprint
347
425
buffer = ctypes.create_string_buffer(20)
348
426
buffer_length = ctypes.c_size_t()
364
442
Note: This will run in its own forked process."""
365
443
366
444
def handle(self):
367
logger.debug(u"TCP connection from: %s",
445
logger.info(u"TCP connection from: %s",
368
446
unicode(self.client_address))
369
session = gnutls.connection.ClientSession(self.request,
370
gnutls.connection.\
371
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.
372
463
373
464
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
374
465
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
375
466
# "+DHE-DSS"))
376
priority = "NORMAL"
377
if self.server.options.priority:
378
priority = self.server.options.priority
467
priority = "NORMAL" # Fallback default, since this
468
# MUST be set.
469
if self.server.settings["priority"]:
470
priority = self.server.settings["priority"]
379
471
gnutls.library.functions.gnutls_priority_set_direct\
380
472
(session._c_object, priority, None);
381
473
382
474
try:
383
475
session.handshake()
384
476
except gnutls.errors.GNUTLSError, error:
385
logger.debug(u"Handshake failed: %s", error)
477
logger.warning(u"Handshake failed: %s", error)
386
478
# Do not run session.bye() here: the session is not
387
479
# established. Just abandon the request.
388
480
return
389
481
try:
390
482
fpr = fingerprint(peer_certificate(session))
391
483
except (TypeError, gnutls.errors.GNUTLSError), error:
392
logger.debug(u"Bad certificate: %s", error)
484
logger.warning(u"Bad certificate: %s", error)
393
485
session.bye()
394
486
return
395
487
logger.debug(u"Fingerprint: %s", fpr)
398
490
if c.fingerprint == fpr:
399
491
client = c
400
492
break
493
if not client:
494
logger.warning(u"Client not found for fingerprint: %s",
495
fpr)
496
session.bye()
497
return
401
498
# Have to check if client.still_valid(), since it is possible
402
499
# that the client timed out while establishing the GnuTLS
403
500
# session.
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)
501
if not client.still_valid():
502
logger.warning(u"Client %(name)s is invalid",
503
vars(client))
411
504
session.bye()
412
505
return
413
506
sent_size = 0
423
516
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
424
517
"""IPv6 TCP server. Accepts 'None' as address and/or port.
425
518
Attributes:
426
options: Command line options
519
settings: Server settings
427
520
clients: Set() of Client objects
521
enabled: Boolean; whether this server is activated yet
428
522
"""
429
523
address_family = socket.AF_INET6
430
524
def __init__(self, *args, **kwargs):
431
if "options" in kwargs:
432
self.options = kwargs["options"]
433
del kwargs["options"]
525
if "settings" in kwargs:
526
self.settings = kwargs["settings"]
527
del kwargs["settings"]
434
528
if "clients" in kwargs:
435
529
self.clients = kwargs["clients"]
436
530
del kwargs["clients"]
531
self.enabled = False
437
532
return super(type(self), self).__init__(*args, **kwargs)
438
533
def server_bind(self):
439
534
"""This overrides the normal server_bind() function
440
535
to bind to an interface if one was specified, and also NOT to
441
536
bind to an address or port if they were not specified."""
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
537
if self.settings["interface"]:
538
# 25 is from /usr/include/asm-i486/socket.h
539
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
446
540
try:
447
541
self.socket.setsockopt(socket.SOL_SOCKET,
448
socket.SO_BINDTODEVICE,
449
self.options.interface)
542
SO_BINDTODEVICE,
543
self.settings["interface"])
450
544
except socket.error, error:
451
545
if error[0] == errno.EPERM:
452
logger.warning(u"No permission to"
453
u" bind to interface %s",
454
self.options.interface)
546
logger.error(u"No permission to"
547
u" bind to interface %s",
548
self.settings["interface"])
455
549
else:
456
550
raise error
457
551
# Only bind(2) the socket if we really need to.
460
554
in6addr_any = "::"
461
555
self.server_address = (in6addr_any,
462
556
self.server_address[1])
463
elif self.server_address[1] is None:
557
elif not self.server_address[1]:
464
558
self.server_address = (self.server_address[0],
465
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"]))
466
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
467
573
468
574
469
575
def string_to_delta(interval):
479
585
datetime.timedelta(1)
480
586
>>> string_to_delta(u'1w')
481
587
datetime.timedelta(7)
588
>>> string_to_delta('5m 30s')
589
datetime.timedelta(0, 330)
482
590
"""
483
try:
484
suffix=unicode(interval[-1])
485
value=int(interval[:-1])
486
if suffix == u"d":
487
delta = datetime.timedelta(value)
488
elif suffix == u"s":
489
delta = datetime.timedelta(0, value)
490
elif suffix == u"m":
491
delta = datetime.timedelta(0, 0, 0, 0, value)
492
elif suffix == u"h":
493
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
494
elif suffix == u"w":
495
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
496
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):
497
609
raise ValueError
498
except (ValueError, IndexError):
499
raise ValueError
500
return delta
501
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()
610
timevalue += delta
611
return timevalue
534
612
535
613
536
614
def server_state_changed(state):
537
615
"""Derived from the Avahi example code"""
538
616
if state == avahi.SERVER_COLLISION:
539
logger.warning(u"Server name collision")
540
remove_service()
617
logger.error(u"Zeroconf server name collision")
618
service.remove()
541
619
elif state == avahi.SERVER_RUNNING:
542
add_service()
620
service.add()
543
621
544
622
545
623
def entry_group_state_changed(state, error):
546
624
"""Derived from the Avahi example code"""
547
global serviceName, server, rename_count
548
549
logger.debug(u"state change: %i", state)
625
logger.debug(u"Avahi state change: %i", state)
550
626
551
627
if state == avahi.ENTRY_GROUP_ESTABLISHED:
552
logger.debug(u"Service established.")
628
logger.debug(u"Zeroconf service established.")
553
629
elif state == avahi.ENTRY_GROUP_COLLISION:
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)
630
logger.warning(u"Zeroconf service name collision.")
631
service.rename()
567
632
elif state == avahi.ENTRY_GROUP_FAILURE:
568
logger.error(u"Error in group state changed %s",
569
unicode(error))
570
killme(1)
571
633
logger.critical(u"Avahi: Error in group state changed %s",
634
unicode(error))
635
raise AvahiGroupError("State changed: %s", str(error))
572
636
573
637
def if_nametoindex(interface):
574
"""Call the C function if_nametoindex()"""
638
"""Call the C function if_nametoindex(), or equivalent"""
639
global if_nametoindex
575
640
try:
576
libc = ctypes.cdll.LoadLibrary("libc.so.6")
577
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
578
645
except (OSError, AttributeError):
579
646
if "struct" not in sys.modules:
580
647
import struct
581
648
if "fcntl" not in sys.modules:
582
649
import fcntl
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):
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):
593
663
"""See daemon(3). Standard BSD Unix function.
594
664
This should really exist as os.daemon, but it doesn't (yet)."""
595
665
if os.fork():
597
667
os.setsid()
598
668
if not nochdir:
599
669
os.chdir("/")
670
if os.fork():
671
sys.exit()
600
672
if not noclose:
601
673
# Close all standard open file descriptors
602
null = os.open("/dev/null", os.O_NOCTTY | os.O_RDWR)
674
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
603
675
if not stat.S_ISCHR(os.fstat(null).st_mode):
604
676
raise OSError(errno.ENODEV,
605
677
"/dev/null not a character device")
610
682
os.close(null)
611
683
612
684
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
622
685
def main():
623
global exitstatus
624
exitstatus = 0
625
686
global main_loop_started
626
687
main_loop_started = False
627
688
628
parser = OptionParser()
689
parser = OptionParser(version = "%%prog %s" % version)
629
690
parser.add_option("-i", "--interface", type="string",
630
default=None, metavar="IF",
631
help="Bind to interface IF")
632
parser.add_option("-a", "--address", type="string", default=None,
691
metavar="IF", help="Bind to interface IF")
692
parser.add_option("-a", "--address", type="string",
633
693
help="Address to listen for requests on")
634
parser.add_option("-p", "--port", type="int", default=None,
694
parser.add_option("-p", "--port", type="int",
635
695
help="Port number to receive requests on")
636
696
parser.add_option("--check", action="store_true", default=False,
637
697
help="Run self-test")
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")
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")
646
709
(options, args) = parser.parse_args()
647
710
648
711
if options.check:
650
713
doctest.testmod()
651
714
sys.exit()
652
715
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;
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"])
664
810
665
811
global main_loop
666
812
global bus
669
815
DBusGMainLoop(set_as_default=True )
670
816
main_loop = gobject.MainLoop()
671
817
bus = dbus.SystemBus()
672
server = dbus.Interface(
673
bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
674
avahi.DBUS_INTERFACE_SERVER )
818
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
819
avahi.DBUS_PATH_SERVER),
820
avahi.DBUS_INTERFACE_SERVER)
675
821
# End of Avahi example code
676
822
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
687
clients = Set()
688
823
def remove_from_clients(client):
689
824
clients.remove(client)
690
825
if not clients:
691
logger.debug(u"No clients left, exiting")
692
killme()
826
logger.critical(u"No clients left, exiting")
827
sys.exit()
693
828
694
clients.update(Set(Client(name=section,
829
clients.update(Set(Client(name = section,
695
830
stop_hook = remove_from_clients,
696
**(dict(client_config\
697
.items(section))))
831
config
832
= dict(client_config.items(section)))
698
833
for section in client_config.sections()))
699
700
if not debug:
701
daemon(False, False)
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
702
862
703
863
def cleanup():
704
864
"Cleanup function; run on exit"
718
878
719
879
if not debug:
720
880
signal.signal(signal.SIGINT, signal.SIG_IGN)
721
signal.signal(signal.SIGHUP, lambda signum, frame: killme())
722
signal.signal(signal.SIGTERM, lambda signum, frame: killme())
881
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
882
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
723
883
724
884
for client in clients:
725
885
client.start()
726
886
727
tcp_server = IPv6_TCPServer((options.address, options.port),
728
tcp_handler,
729
options=options,
730
clients=clients)
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")
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
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")
755
913
main_loop_started = True
756
914
main_loop.run()
915
except AvahiError, error:
916
logger.critical(u"AvahiError: %s" + unicode(error))
917
sys.exit(1)
757
918
except KeyboardInterrupt:
758
919
if debug:
759
920
print
760
761
sys.exit(exitstatus)
762
921
763
922
if __name__ == '__main__':
764
923
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0