2
2
# -*- mode: python; coding: utf-8 -*-
4
# Mandos server - give out binary blobs to connecting clients.
6
# This program is partly derived from an example program for an Avahi
7
# service publisher, downloaded from
8
# <http://avahi.org/wiki/PythonPublishExample>. This includes the
9
# methods "add" and "remove" in the "AvahiService" class, the
10
# "server_state_changed" and "entry_group_state_changed" functions,
11
# and some lines in "main".
14
# Copyright © 2008 Teddy Hogeborn & Björn Påhlsson
16
# This program is free software: you can redistribute it and/or modify
17
# it under the terms of the GNU General Public License as published by
18
# the Free Software Foundation, either version 3 of the License, or
19
# (at your option) any later version.
21
# This program is distributed in the hope that it will be useful,
22
# but WITHOUT ANY WARRANTY; without even the implied warranty of
23
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
24
# GNU General Public License for more details.
26
# You should have received a copy of the GNU General Public License
27
# along with this program. If not, see
28
# <http://www.gnu.org/licenses/>.
30
# Contact the authors at <mandos@fukt.bsnet.se>.
4
33
from __future__ import division
9
37
from optparse import OptionParser
56
import logging.handlers
31
62
from dbus.mainloop.glib import DBusGMainLoop
35
import logging.handlers
37
68
logger = logging.Logger('mandos')
38
69
syslogger = logging.handlers.SysLogHandler\
39
(facility = logging.handlers.SysLogHandler.LOG_DAEMON)
70
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
40
72
syslogger.setFormatter(logging.Formatter\
41
('%(levelname)s: %(message)s'))
73
('Mandos: %(levelname)s: %(message)s'))
42
74
logger.addHandler(syslogger)
45
# This variable is used to optionally bind to a specified interface.
46
# It is a global variable to fit in with the other variables from the
47
# Avahi server example code.
48
serviceInterface = avahi.IF_UNSPEC
49
# From the Avahi server example code:
50
serviceName = "Mandos"
51
serviceType = "_mandos._tcp" # http://www.dns-sd.org/ServiceTypes.html
52
servicePort = None # Not known at startup
53
serviceTXT = [] # TXT record for the service
54
domain = "" # Domain to publish on, default to .local
55
host = "" # Host to publish records for, default to localhost
56
group = None #our entry group
57
rename_count = 12 # Counter so we only rename after collisions a
58
# sensible number of times
76
console = logging.StreamHandler()
77
console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
79
logger.addHandler(console)
81
class AvahiError(Exception):
82
def __init__(self, value):
84
super(AvahiError, self).__init__()
86
return repr(self.value)
88
class AvahiServiceError(AvahiError):
91
class AvahiGroupError(AvahiError):
95
class AvahiService(object):
96
"""An Avahi (Zeroconf) service.
98
interface: integer; avahi.IF_UNSPEC or an interface index.
99
Used to optionally bind to the specified interface.
100
name: string; Example: 'Mandos'
101
type: string; Example: '_mandos._tcp'.
102
See <http://www.dns-sd.org/ServiceTypes.html>
103
port: integer; what port to announce
104
TXT: list of strings; TXT record for the service
105
domain: string; Domain to publish on, default to .local if empty.
106
host: string; Host to publish records for, default is localhost
107
max_renames: integer; maximum number of renames
108
rename_count: integer; counter so we only rename after collisions
109
a sensible number of times
111
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
112
servicetype = None, port = None, TXT = None, domain = "",
113
host = "", max_renames = 32768):
114
self.interface = interface
116
self.type = servicetype
124
self.rename_count = 0
125
self.max_renames = max_renames
127
"""Derived from the Avahi example code"""
128
if self.rename_count >= self.max_renames:
129
logger.critical(u"No suitable Zeroconf service name found"
130
u" after %i retries, exiting.",
132
raise AvahiServiceError("Too many renames")
133
self.name = server.GetAlternativeServiceName(self.name)
134
logger.info(u"Changing Zeroconf service name to %r ...",
136
syslogger.setFormatter(logging.Formatter\
137
('Mandos (%s): %%(levelname)s:'
138
' %%(message)s' % self.name))
141
self.rename_count += 1
143
"""Derived from the Avahi example code"""
144
if group is not None:
147
"""Derived from the Avahi example code"""
150
group = dbus.Interface\
151
(bus.get_object(avahi.DBUS_NAME,
152
server.EntryGroupNew()),
153
avahi.DBUS_INTERFACE_ENTRY_GROUP)
154
group.connect_to_signal('StateChanged',
155
entry_group_state_changed)
156
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
157
service.name, service.type)
159
self.interface, # interface
160
avahi.PROTO_INET6, # protocol
161
dbus.UInt32(0), # flags
162
self.name, self.type,
163
self.domain, self.host,
164
dbus.UInt16(self.port),
165
avahi.string_array_to_txt_array(self.TXT))
168
# From the Avahi example code:
169
group = None # our entry group
59
170
# End of Avahi example code
66
177
fingerprint: string (40 or 32 hexadecimal digits); used to
67
178
uniquely identify the client
68
179
secret: bytestring; sent verbatim (over TLS) to client
69
fqdn: string (FQDN); available for use by the checker command
70
created: datetime.datetime()
71
last_seen: datetime.datetime() or None if not yet seen
72
timeout: datetime.timedelta(); How long from last_seen until
73
this client is invalid
180
host: string; available for use by the checker command
181
created: datetime.datetime(); object creation, not client host
182
last_checked_ok: datetime.datetime() or None if not yet checked OK
183
timeout: datetime.timedelta(); How long from last_checked_ok
184
until this client is invalid
74
185
interval: datetime.timedelta(); How often to start a new checker
75
186
stop_hook: If set, called by stop() as stop_hook(self)
76
187
checker: subprocess.Popen(); a running checker process used
77
188
to see if the client lives.
78
Is None if no process is running.
189
'None' if no process is running.
79
190
checker_initiator_tag: a gobject event source tag, or None
80
191
stop_initiator_tag: - '' -
81
192
checker_callback_tag: - '' -
82
193
checker_command: string; External command which is run to check if
83
client lives. %()s expansions are done at
194
client lives. %() expansions are done at
84
195
runtime with vars(self) as dict, so that for
85
196
instance %(name)s can be used in the command.
86
197
Private attibutes:
87
198
_timeout: Real variable for 'timeout'
88
199
_interval: Real variable for 'interval'
89
_timeout_milliseconds: Used by gobject.timeout_add()
200
_timeout_milliseconds: Used when calling gobject.timeout_add()
90
201
_interval_milliseconds: - '' -
92
203
def _set_timeout(self, timeout):
112
223
interval = property(lambda self: self._interval,
114
225
del _set_interval
115
def __init__(self, name=None, options=None, stop_hook=None,
116
fingerprint=None, secret=None, secfile=None,
117
fqdn=None, timeout=None, interval=-1, checker=None):
226
def __init__(self, name = None, stop_hook=None, config=None):
227
"""Note: the 'checker' key in 'config' sets the
228
'checker_command' attribute and *not* the 'checker'
119
# Uppercase and remove spaces from fingerprint
120
# for later comparison purposes with return value of
121
# the fingerprint() function
122
self.fingerprint = fingerprint.upper().replace(u" ", u"")
124
self.secret = secret.decode(u"base64")
127
self.secret = sf.read()
233
logger.debug(u"Creating client %r", self.name)
234
# Uppercase and remove spaces from fingerprint for later
235
# comparison purposes with return value from the fingerprint()
237
self.fingerprint = config["fingerprint"].upper()\
239
logger.debug(u" Fingerprint: %s", self.fingerprint)
240
if "secret" in config:
241
self.secret = config["secret"].decode(u"base64")
242
elif "secfile" in config:
243
secfile = open(config["secfile"])
244
self.secret = secfile.read()
130
raise RuntimeError(u"No secret or secfile for client %s"
132
self.fqdn = fqdn # string
247
raise TypeError(u"No secret or secfile for client %s"
249
self.host = config.get("host", "")
133
250
self.created = datetime.datetime.now()
134
self.last_seen = None
136
self.timeout = options.timeout
138
self.timeout = string_to_delta(timeout)
140
self.interval = options.interval
142
self.interval = string_to_delta(interval)
251
self.last_checked_ok = None
252
self.timeout = string_to_delta(config["timeout"])
253
self.interval = string_to_delta(config["interval"])
143
254
self.stop_hook = stop_hook
144
255
self.checker = None
145
256
self.checker_initiator_tag = None
146
257
self.stop_initiator_tag = None
147
258
self.checker_callback_tag = None
148
self.check_command = checker
259
self.check_command = config["checker"]
150
"""Start this clients checker and timeout hooks"""
261
"""Start this client's checker and timeout hooks"""
151
262
# Schedule a new checker to be started an 'interval' from now,
152
263
# and every interval from then on.
153
264
self.checker_initiator_tag = gobject.timeout_add\
203
312
logger.warning(u"Checker for %(name)s crashed?",
206
logger.debug(u"Checker for %(name)s failed",
209
self.checker_callback_tag = None
315
logger.info(u"Checker for %(name)s failed",
210
317
def start_checker(self):
211
318
"""Start a new checker subprocess if one is not running.
212
319
If a checker already exists, leave it running and do
321
# The reason for not killing a running checker is that if we
322
# did that, then if a checker (for some reason) started
323
# running slowly and taking more than 'interval' time, the
324
# client would inevitably timeout, since no checker would get
325
# a chance to run to completion. If we instead leave running
326
# checkers alone, the checker would have to take more time
327
# than 'timeout' for the client to be declared invalid, which
328
# is as it should be.
214
329
if self.checker is None:
216
command = self.check_command % self.fqdn
331
# In case check_command has exactly one % operator
332
command = self.check_command % self.host
217
333
except TypeError:
334
# Escape attributes for the shell
218
335
escaped_attrs = dict((key, re.escape(str(val)))
220
337
vars(self).iteritems())
222
339
command = self.check_command % escaped_attrs
223
340
except TypeError, error:
224
logger.critical(u'Could not format string "%s":'
225
u' %s', self.check_command, error)
341
logger.error(u'Could not format string "%s":'
342
u' %s', self.check_command, error)
226
343
return True # Try again later
228
logger.debug(u"Starting checker %r for %s",
230
self.checker = subprocess.\
232
close_fds=True, shell=True,
345
logger.info(u"Starting checker %r for %s",
347
# We don't need to redirect stdout and stderr, since
348
# in normal mode, that is already done by daemon(),
349
# and in debug mode we don't want to. (Stdin is
350
# always replaced by /dev/null.)
351
self.checker = subprocess.Popen(command,
234
354
self.checker_callback_tag = gobject.child_watch_add\
235
355
(self.checker.pid,
236
356
self.checker_callback)
237
except subprocess.OSError, error:
357
except OSError, error:
238
358
logger.error(u"Failed to start subprocess: %s",
240
360
# Re-run this periodically if run by gobject.timeout_add
242
362
def stop_checker(self):
243
363
"""Force the checker process, if any, to stop."""
244
if not hasattr(self, "checker") or self.checker is None:
364
if self.checker_callback_tag:
365
gobject.source_remove(self.checker_callback_tag)
366
self.checker_callback_tag = None
367
if getattr(self, "checker", None) is None:
246
gobject.source_remove(self.checker_callback_tag)
247
self.checker_callback_tag = None
248
os.kill(self.checker.pid, signal.SIGTERM)
249
if self.checker.poll() is None:
250
os.kill(self.checker.pid, signal.SIGKILL)
369
logger.debug(u"Stopping checker for %(name)s", vars(self))
371
os.kill(self.checker.pid, signal.SIGTERM)
373
#if self.checker.poll() is None:
374
# os.kill(self.checker.pid, signal.SIGKILL)
375
except OSError, error:
376
if error.errno != errno.ESRCH: # No such process
251
378
self.checker = None
252
def still_valid(self, now=None):
379
def still_valid(self):
253
380
"""Has the timeout not yet passed for this client?"""
255
now = datetime.datetime.now()
256
if self.last_seen is None:
381
now = datetime.datetime.now()
382
if self.last_checked_ok is None:
257
383
return now < (self.created + self.timeout)
259
return now < (self.last_seen + self.timeout)
385
return now < (self.last_checked_ok + self.timeout)
262
388
def peer_certificate(session):
263
"Return an OpenPGP data packet string for the peer's certificate"
389
"Return the peer's OpenPGP certificate as a bytestring"
264
390
# If not an OpenPGP certificate...
265
391
if gnutls.library.functions.gnutls_certificate_type_get\
266
392
(session._c_object) \
279
405
def fingerprint(openpgp):
280
"Convert an OpenPGP data string to a hexdigit fingerprint string"
281
# New empty GnuTLS certificate
282
crt = gnutls.library.types.gnutls_openpgp_crt_t()
283
gnutls.library.functions.gnutls_openpgp_crt_init\
406
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
285
407
# New GnuTLS "datum" with the OpenPGP public key
286
408
datum = gnutls.library.types.gnutls_datum_t\
287
409
(ctypes.cast(ctypes.c_char_p(openpgp),
288
410
ctypes.POINTER(ctypes.c_ubyte)),
289
411
ctypes.c_uint(len(openpgp)))
412
# New empty GnuTLS certificate
413
crt = gnutls.library.types.gnutls_openpgp_crt_t()
414
gnutls.library.functions.gnutls_openpgp_crt_init\
290
416
# Import the OpenPGP public key into the certificate
291
ret = gnutls.library.functions.gnutls_openpgp_crt_import\
294
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
417
gnutls.library.functions.gnutls_openpgp_crt_import\
418
(crt, ctypes.byref(datum),
419
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
420
# Verify the self signature in the key
421
crtverify = ctypes.c_uint()
422
gnutls.library.functions.gnutls_openpgp_crt_verify_self\
423
(crt, 0, ctypes.byref(crtverify))
424
if crtverify.value != 0:
425
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
426
raise gnutls.errors.CertificateSecurityError("Verify failed")
295
427
# New buffer for the fingerprint
296
buffer = ctypes.create_string_buffer(20)
297
buffer_length = ctypes.c_size_t()
428
buf = ctypes.create_string_buffer(20)
429
buf_len = ctypes.c_size_t()
298
430
# Get the fingerprint from the certificate into the buffer
299
431
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
300
(crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
432
(crt, ctypes.byref(buf), ctypes.byref(buf_len))
301
433
# Deinit the certificate
302
434
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
303
435
# Convert the buffer to a Python bytestring
304
fpr = ctypes.string_at(buffer, buffer_length.value)
436
fpr = ctypes.string_at(buf, buf_len.value)
305
437
# Convert the bytestring to hexadecimal notation
306
438
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
310
class tcp_handler(SocketServer.BaseRequestHandler, object):
442
class TCP_handler(SocketServer.BaseRequestHandler, object):
311
443
"""A TCP request handler class.
312
444
Instantiated by IPv6_TCPServer for each request to handle it.
313
445
Note: This will run in its own forked process."""
315
447
def handle(self):
316
logger.debug(u"TCP connection from: %s",
448
logger.info(u"TCP connection from: %s",
317
449
unicode(self.client_address))
318
session = gnutls.connection.ClientSession(self.request,
450
session = gnutls.connection.ClientSession\
451
(self.request, gnutls.connection.X509Credentials())
453
line = self.request.makefile().readline()
454
logger.debug(u"Protocol version: %r", line)
456
if int(line.strip().split()[0]) > 1:
458
except (ValueError, IndexError, RuntimeError), error:
459
logger.error(u"Unknown protocol version: %s", error)
462
# Note: gnutls.connection.X509Credentials is really a generic
463
# GnuTLS certificate credentials object so long as no X.509
464
# keys are added to it. Therefore, we can use it here despite
465
# using OpenPGP certificates.
322
467
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
323
468
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
325
priority = "SECURE256"
470
priority = "NORMAL" # Fallback default, since this
472
if self.server.settings["priority"]:
473
priority = self.server.settings["priority"]
327
474
gnutls.library.functions.gnutls_priority_set_direct\
328
(session._c_object, priority, None);
475
(session._c_object, priority, None)
331
478
session.handshake()
332
479
except gnutls.errors.GNUTLSError, error:
333
logger.debug(u"Handshake failed: %s", error)
480
logger.warning(u"Handshake failed: %s", error)
334
481
# Do not run session.bye() here: the session is not
335
482
# established. Just abandon the request.
338
485
fpr = fingerprint(peer_certificate(session))
339
486
except (TypeError, gnutls.errors.GNUTLSError), error:
340
logger.debug(u"Bad certificate: %s", error)
487
logger.warning(u"Bad certificate: %s", error)
343
490
logger.debug(u"Fingerprint: %s", fpr)
492
for c in self.server.clients:
346
493
if c.fingerprint == fpr:
497
logger.warning(u"Client not found for fingerprint: %s",
349
501
# Have to check if client.still_valid(), since it is possible
350
502
# that the client timed out while establishing the GnuTLS
352
if (not client) or (not client.still_valid()):
354
logger.debug(u"Client %(name)s is invalid",
357
logger.debug(u"Client not found for fingerprint: %s",
504
if not client.still_valid():
505
logger.warning(u"Client %(name)s is invalid",
371
519
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
372
520
"""IPv6 TCP server. Accepts 'None' as address and/or port.
374
options: Command line options
522
settings: Server settings
375
523
clients: Set() of Client objects
524
enabled: Boolean; whether this server is activated yet
377
526
address_family = socket.AF_INET6
378
527
def __init__(self, *args, **kwargs):
379
if "options" in kwargs:
380
self.options = kwargs["options"]
381
del kwargs["options"]
528
if "settings" in kwargs:
529
self.settings = kwargs["settings"]
530
del kwargs["settings"]
382
531
if "clients" in kwargs:
383
532
self.clients = kwargs["clients"]
384
533
del kwargs["clients"]
385
return super(type(self), self).__init__(*args, **kwargs)
535
super(IPv6_TCPServer, self).__init__(*args, **kwargs)
386
536
def server_bind(self):
387
537
"""This overrides the normal server_bind() function
388
538
to bind to an interface if one was specified, and also NOT to
389
539
bind to an address or port if they were not specified."""
390
if self.options.interface:
391
if not hasattr(socket, "SO_BINDTODEVICE"):
392
# From /usr/include/asm-i486/socket.h
393
socket.SO_BINDTODEVICE = 25
540
if self.settings["interface"]:
541
# 25 is from /usr/include/asm-i486/socket.h
542
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
395
544
self.socket.setsockopt(socket.SOL_SOCKET,
396
socket.SO_BINDTODEVICE,
397
self.options.interface)
546
self.settings["interface"])
398
547
except socket.error, error:
399
548
if error[0] == errno.EPERM:
400
logger.warning(u"No permission to"
401
u" bind to interface %s",
402
self.options.interface)
549
logger.error(u"No permission to"
550
u" bind to interface %s",
551
self.settings["interface"])
405
554
# Only bind(2) the socket if we really need to.
427
588
datetime.timedelta(1)
428
589
>>> string_to_delta(u'1w')
429
590
datetime.timedelta(7)
591
>>> string_to_delta('5m 30s')
592
datetime.timedelta(0, 330)
432
suffix=unicode(interval[-1])
433
value=int(interval[:-1])
435
delta = datetime.timedelta(value)
437
delta = datetime.timedelta(0, value)
439
delta = datetime.timedelta(0, 0, 0, 0, value)
441
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
443
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
594
timevalue = datetime.timedelta(0)
595
for s in interval.split():
597
suffix = unicode(s[-1])
600
delta = datetime.timedelta(value)
602
delta = datetime.timedelta(0, value)
604
delta = datetime.timedelta(0, 0, 0, 0, value)
606
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
608
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
611
except (ValueError, IndexError):
446
except (ValueError, IndexError):
452
"""From the Avahi server example code"""
453
global group, serviceName, serviceType, servicePort, serviceTXT, \
456
group = dbus.Interface(
457
bus.get_object( avahi.DBUS_NAME,
458
server.EntryGroupNew()),
459
avahi.DBUS_INTERFACE_ENTRY_GROUP)
460
group.connect_to_signal('StateChanged',
461
entry_group_state_changed)
462
logger.debug(u"Adding service '%s' of type '%s' ...",
463
serviceName, serviceType)
466
serviceInterface, # interface
467
avahi.PROTO_INET6, # protocol
468
dbus.UInt32(0), # flags
469
serviceName, serviceType,
471
dbus.UInt16(servicePort),
472
avahi.string_array_to_txt_array(serviceTXT))
476
def remove_service():
477
"""From the Avahi server example code"""
480
if not group is None:
484
617
def server_state_changed(state):
485
"""From the Avahi server example code"""
618
"""Derived from the Avahi example code"""
486
619
if state == avahi.SERVER_COLLISION:
487
logger.warning(u"Server name collision")
620
logger.error(u"Zeroconf server name collision")
489
622
elif state == avahi.SERVER_RUNNING:
493
626
def entry_group_state_changed(state, error):
494
"""From the Avahi server example code"""
495
global serviceName, server, rename_count
497
logger.debug(u"state change: %i", state)
627
"""Derived from the Avahi example code"""
628
logger.debug(u"Avahi state change: %i", state)
499
630
if state == avahi.ENTRY_GROUP_ESTABLISHED:
500
logger.debug(u"Service established.")
631
logger.debug(u"Zeroconf service established.")
501
632
elif state == avahi.ENTRY_GROUP_COLLISION:
503
rename_count = rename_count - 1
505
name = server.GetAlternativeServiceName(name)
506
logger.warning(u"Service name collision, "
507
u"changing name to '%s' ...", name)
512
logger.error(u"No suitable service name found after %i"
513
u" retries, exiting.", n_rename)
633
logger.warning(u"Zeroconf service name collision.")
515
635
elif state == avahi.ENTRY_GROUP_FAILURE:
516
logger.error(u"Error in group state changed %s",
636
logger.critical(u"Avahi: Error in group state changed %s",
638
raise AvahiGroupError("State changed: %s", str(error))
521
640
def if_nametoindex(interface):
522
"""Call the C function if_nametoindex()"""
641
"""Call the C function if_nametoindex(), or equivalent"""
642
global if_nametoindex
524
libc = ctypes.cdll.LoadLibrary("libc.so.6")
525
return libc.if_nametoindex(interface)
644
if_nametoindex = ctypes.cdll.LoadLibrary\
645
(ctypes.util.find_library("c")).if_nametoindex
526
646
except (OSError, AttributeError):
527
647
if "struct" not in sys.modules:
529
649
if "fcntl" not in sys.modules:
531
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
533
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
534
struct.pack("16s16x", interface))
536
interface_index = struct.unpack("I", ifreq[16:20])[0]
537
return interface_index
540
def daemon(nochdir, noclose):
651
def if_nametoindex(interface):
652
"Get an interface index the hard way, i.e. using fcntl()"
653
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
655
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
656
struct.pack("16s16x", interface))
658
interface_index = struct.unpack("I", ifreq[16:20])[0]
659
return interface_index
660
return if_nametoindex(interface)
663
def daemon(nochdir = False, noclose = False):
541
664
"""See daemon(3). Standard BSD Unix function.
542
665
This should really exist as os.daemon, but it doesn't (yet)."""
561
def killme(status = 0):
562
logger.debug("Stopping server with exit status %d", status)
564
if main_loop_started:
570
if __name__ == '__main__':
572
main_loop_started = False
573
parser = OptionParser()
687
parser = OptionParser(version = "%%prog %s" % version)
574
688
parser.add_option("-i", "--interface", type="string",
575
default=None, metavar="IF",
576
help="Bind to interface IF")
577
parser.add_option("-p", "--port", type="int", default=None,
689
metavar="IF", help="Bind to interface IF")
690
parser.add_option("-a", "--address", type="string",
691
help="Address to listen for requests on")
692
parser.add_option("-p", "--port", type="int",
578
693
help="Port number to receive requests on")
579
parser.add_option("--timeout", type="string", # Parsed later
581
help="Amount of downtime allowed for clients")
582
parser.add_option("--interval", type="string", # Parsed later
584
help="How often to check that a client is up")
585
694
parser.add_option("--check", action="store_true", default=False,
586
695
help="Run self-test")
587
parser.add_option("--debug", action="store_true", default=False,
589
(options, args) = parser.parse_args()
696
parser.add_option("--debug", action="store_true",
697
help="Debug mode; run in foreground and log to"
699
parser.add_option("--priority", type="string", help="GnuTLS"
700
" priority string (see GnuTLS documentation)")
701
parser.add_option("--servicename", type="string", metavar="NAME",
702
help="Zeroconf service name")
703
parser.add_option("--configdir", type="string",
704
default="/etc/mandos", metavar="DIR",
705
help="Directory to search for configuration"
707
options = parser.parse_args()[0]
591
709
if options.check:
593
711
doctest.testmod()
596
# Parse the time arguments
598
options.timeout = string_to_delta(options.timeout)
600
parser.error("option --timeout: Unparseable time")
602
options.interval = string_to_delta(options.interval)
604
parser.error("option --interval: Unparseable time")
607
defaults = { "checker": "fping -q -- %%(fqdn)s" }
608
client_config = ConfigParser.SafeConfigParser(defaults)
609
#client_config.readfp(open("secrets.conf"), "secrets.conf")
610
client_config.read("mandos-clients.conf")
612
# From the Avahi server example code
714
# Default values for config file for server-global settings
715
server_defaults = { "interface": "",
720
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
721
"servicename": "Mandos",
724
# Parse config file for server-global settings
725
server_config = ConfigParser.SafeConfigParser(server_defaults)
727
server_config.read(os.path.join(options.configdir, "mandos.conf"))
728
# Convert the SafeConfigParser object to a dict
729
server_settings = server_config.defaults()
730
# Use getboolean on the boolean config option
731
server_settings["debug"] = server_config.getboolean\
735
# Override the settings from the config file with command line
737
for option in ("interface", "address", "port", "debug",
738
"priority", "servicename", "configdir"):
739
value = getattr(options, option)
740
if value is not None:
741
server_settings[option] = value
743
# Now we have our good server settings in "server_settings"
745
debug = server_settings["debug"]
748
syslogger.setLevel(logging.WARNING)
749
console.setLevel(logging.WARNING)
751
if server_settings["servicename"] != "Mandos":
752
syslogger.setFormatter(logging.Formatter\
753
('Mandos (%s): %%(levelname)s:'
755
% server_settings["servicename"]))
757
# Parse config file with clients
758
client_defaults = { "timeout": "1h",
760
"checker": "fping -q -- %(host)s",
763
client_config = ConfigParser.SafeConfigParser(client_defaults)
764
client_config.read(os.path.join(server_settings["configdir"],
768
tcp_server = IPv6_TCPServer((server_settings["address"],
769
server_settings["port"]),
771
settings=server_settings,
773
pidfilename = "/var/run/mandos.pid"
775
pidfile = open(pidfilename, "w")
776
except IOError, error:
777
logger.error("Could not open file %r", pidfilename)
782
uid = pwd.getpwnam("mandos").pw_uid
785
uid = pwd.getpwnam("nobody").pw_uid
789
gid = pwd.getpwnam("mandos").pw_gid
792
gid = pwd.getpwnam("nogroup").pw_gid
798
except OSError, error:
799
if error[0] != errno.EPERM:
803
service = AvahiService(name = server_settings["servicename"],
804
servicetype = "_mandos._tcp", )
805
if server_settings["interface"]:
806
service.interface = if_nametoindex\
807
(server_settings["interface"])
812
# From the Avahi example code
613
813
DBusGMainLoop(set_as_default=True )
614
814
main_loop = gobject.MainLoop()
615
815
bus = dbus.SystemBus()
616
server = dbus.Interface(
617
bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
618
avahi.DBUS_INTERFACE_SERVER )
816
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
817
avahi.DBUS_PATH_SERVER),
818
avahi.DBUS_INTERFACE_SERVER)
619
819
# End of Avahi example code
621
debug = options.debug
624
console = logging.StreamHandler()
625
# console.setLevel(logging.DEBUG)
626
console.setFormatter(logging.Formatter\
627
('%(levelname)s: %(message)s'))
628
logger.addHandler(console)
632
821
def remove_from_clients(client):
633
822
clients.remove(client)
635
logger.debug(u"No clients left, exiting")
824
logger.critical(u"No clients left, exiting")
638
clients.update(Set(Client(name=section, options=options,
827
clients.update(Set(Client(name = section,
639
828
stop_hook = remove_from_clients,
640
**(dict(client_config\
830
= dict(client_config.items(section)))
642
831
for section in client_config.sections()))
833
logger.critical(u"No clients defined")
837
# Redirect stdin so all checkers get /dev/null
838
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
839
os.dup2(null, sys.stdin.fileno())
844
logger.removeHandler(console)
845
# Close all input and output, do double fork, etc.
850
pidfile.write(str(pid) + "\n")
854
logger.error(u"Could not write to file %r with PID %d",
857
# "pidfile" was never created
648
862
"Cleanup function; run on exit"
650
# From the Avahi server example code
864
# From the Avahi example code
651
865
if not group is None:
654
868
# End of Avahi example code
656
for client in clients:
871
client = clients.pop()
657
872
client.stop_hook = None
663
878
signal.signal(signal.SIGINT, signal.SIG_IGN)
664
signal.signal(signal.SIGHUP, lambda signum, frame: killme())
665
signal.signal(signal.SIGTERM, lambda signum, frame: killme())
879
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
880
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
667
882
for client in clients:
670
tcp_server = IPv6_TCPServer((None, options.port),
674
# Find out what random port we got
675
servicePort = tcp_server.socket.getsockname()[1]
676
logger.debug(u"Now listening on port %d", servicePort)
678
if options.interface is not None:
679
serviceInterface = if_nametoindex(options.interface)
681
# From the Avahi server example code
682
server.connect_to_signal("StateChanged", server_state_changed)
684
server_state_changed(server.GetState())
685
except dbus.exceptions.DBusException, error:
686
logger.critical(u"DBusException: %s", error)
688
# End of Avahi example code
690
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
691
lambda *args, **kwargs:
692
tcp_server.handle_request(*args[2:],
695
main_loop_started = True
886
tcp_server.server_activate()
888
# Find out what port we got
889
service.port = tcp_server.socket.getsockname()[1]
890
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
891
u" scope_id %d" % tcp_server.socket.getsockname())
893
#service.interface = tcp_server.socket.getsockname()[3]
896
# From the Avahi example code
897
server.connect_to_signal("StateChanged", server_state_changed)
899
server_state_changed(server.GetState())
900
except dbus.exceptions.DBusException, error:
901
logger.critical(u"DBusException: %s", error)
903
# End of Avahi example code
905
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
906
lambda *args, **kwargs:
907
tcp_server.handle_request\
908
(*args[2:], **kwargs) or True)
910
logger.debug(u"Starting main loop")
912
except AvahiError, error:
913
logger.critical(u"AvahiError: %s" + unicode(error))
697
915
except KeyboardInterrupt:
919
if __name__ == '__main__':