14
44
import gnutls.library.functions
15
45
import gnutls.library.constants
16
46
import gnutls.library.types
47
import ConfigParser as configparser
56
import logging.handlers
58
from contextlib import closing
28
67
from dbus.mainloop.glib import DBusGMainLoop
31
# This variable is used to optionally bind to a specified interface.
32
# It is a global variable to fit in with the other variables from the
33
# Avahi server example code.
34
serviceInterface = avahi.IF_UNSPEC
35
# From the Avahi server example code:
36
serviceName = "Mandos"
37
serviceType = "_mandos._tcp" # http://www.dns-sd.org/ServiceTypes.html
38
servicePort = None # Not known at startup
39
serviceTXT = [] # TXT record for the service
40
domain = "" # Domain to publish on, default to .local
41
host = "" # Host to publish records for, default to localhost
42
group = None #our entry group
43
rename_count = 12 # Counter so we only rename after collisions a
44
# sensible number of times
45
# End of Avahi example code
70
import xml.dom.minidom
74
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
75
except AttributeError:
77
from IN import SO_BINDTODEVICE
79
SO_BINDTODEVICE = None
84
logger = logging.Logger(u'mandos')
85
syslogger = (logging.handlers.SysLogHandler
86
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
87
address = "/dev/log"))
88
syslogger.setFormatter(logging.Formatter
89
(u'Mandos [%(process)d]: %(levelname)s:'
91
logger.addHandler(syslogger)
93
console = logging.StreamHandler()
94
console.setFormatter(logging.Formatter(u'%(name)s [%(process)d]:'
97
logger.addHandler(console)
99
class AvahiError(Exception):
100
def __init__(self, value, *args, **kwargs):
102
super(AvahiError, self).__init__(value, *args, **kwargs)
103
def __unicode__(self):
104
return unicode(repr(self.value))
106
class AvahiServiceError(AvahiError):
109
class AvahiGroupError(AvahiError):
113
class AvahiService(object):
114
"""An Avahi (Zeroconf) service.
117
interface: integer; avahi.IF_UNSPEC or an interface index.
118
Used to optionally bind to the specified interface.
119
name: string; Example: u'Mandos'
120
type: string; Example: u'_mandos._tcp'.
121
See <http://www.dns-sd.org/ServiceTypes.html>
122
port: integer; what port to announce
123
TXT: list of strings; TXT record for the service
124
domain: string; Domain to publish on, default to .local if empty.
125
host: string; Host to publish records for, default is localhost
126
max_renames: integer; maximum number of renames
127
rename_count: integer; counter so we only rename after collisions
128
a sensible number of times
129
group: D-Bus Entry Group
131
bus: dbus.SystemBus()
133
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
134
servicetype = None, port = None, TXT = None,
135
domain = u"", host = u"", max_renames = 32768,
136
protocol = avahi.PROTO_UNSPEC, bus = None):
137
self.interface = interface
139
self.type = servicetype
141
self.TXT = TXT if TXT is not None else []
144
self.rename_count = 0
145
self.max_renames = max_renames
146
self.protocol = protocol
147
self.group = None # our entry group
151
"""Derived from the Avahi example code"""
152
if self.rename_count >= self.max_renames:
153
logger.critical(u"No suitable Zeroconf service name found"
154
u" after %i retries, exiting.",
156
raise AvahiServiceError(u"Too many renames")
157
self.name = self.server.GetAlternativeServiceName(self.name)
158
logger.info(u"Changing Zeroconf service name to %r ...",
160
syslogger.setFormatter(logging.Formatter
161
(u'Mandos (%s) [%%(process)d]:'
162
u' %%(levelname)s: %%(message)s'
166
self.rename_count += 1
168
"""Derived from the Avahi example code"""
169
if self.group is not None:
172
"""Derived from the Avahi example code"""
173
if self.group is None:
174
self.group = dbus.Interface(
175
self.bus.get_object(avahi.DBUS_NAME,
176
self.server.EntryGroupNew()),
177
avahi.DBUS_INTERFACE_ENTRY_GROUP)
178
self.group.connect_to_signal('StateChanged',
180
.entry_group_state_changed)
181
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
182
self.name, self.type)
183
self.group.AddService(
186
dbus.UInt32(0), # flags
187
self.name, self.type,
188
self.domain, self.host,
189
dbus.UInt16(self.port),
190
avahi.string_array_to_txt_array(self.TXT))
192
def entry_group_state_changed(self, state, error):
193
"""Derived from the Avahi example code"""
194
logger.debug(u"Avahi state change: %i", state)
196
if state == avahi.ENTRY_GROUP_ESTABLISHED:
197
logger.debug(u"Zeroconf service established.")
198
elif state == avahi.ENTRY_GROUP_COLLISION:
199
logger.warning(u"Zeroconf service name collision.")
201
elif state == avahi.ENTRY_GROUP_FAILURE:
202
logger.critical(u"Avahi: Error in group state changed %s",
204
raise AvahiGroupError(u"State changed: %s"
207
"""Derived from the Avahi example code"""
208
if self.group is not None:
211
def server_state_changed(self, state):
212
"""Derived from the Avahi example code"""
213
if state == avahi.SERVER_COLLISION:
214
logger.error(u"Zeroconf server name collision")
216
elif state == avahi.SERVER_RUNNING:
219
"""Derived from the Avahi example code"""
220
if self.server is None:
221
self.server = dbus.Interface(
222
self.bus.get_object(avahi.DBUS_NAME,
223
avahi.DBUS_PATH_SERVER),
224
avahi.DBUS_INTERFACE_SERVER)
225
self.server.connect_to_signal(u"StateChanged",
226
self.server_state_changed)
227
self.server_state_changed(self.server.GetState())
48
230
class Client(object):
49
231
"""A representation of a client host served by this server.
51
name: string; from the config file, used in log messages
234
name: string; from the config file, used in log messages and
52
236
fingerprint: string (40 or 32 hexadecimal digits); used to
53
237
uniquely identify the client
54
secret: bytestring; sent verbatim (over TLS) to client
55
fqdn: string (FQDN); available for use by the checker command
56
created: datetime.datetime()
57
last_seen: datetime.datetime() or None if not yet seen
58
timeout: datetime.timedelta(); How long from last_seen until
59
this client is invalid
60
interval: datetime.timedelta(); How often to start a new checker
61
stop_hook: If set, called by stop() as stop_hook(self)
62
checker: subprocess.Popen(); a running checker process used
63
to see if the client lives.
64
Is None if no process is running.
238
secret: bytestring; sent verbatim (over TLS) to client
239
host: string; available for use by the checker command
240
created: datetime.datetime(); (UTC) object creation
241
last_enabled: datetime.datetime(); (UTC)
243
last_checked_ok: datetime.datetime(); (UTC) or None
244
timeout: datetime.timedelta(); How long from last_checked_ok
245
until this client is invalid
246
interval: datetime.timedelta(); How often to start a new checker
247
disable_hook: If set, called by disable() as disable_hook(self)
248
checker: subprocess.Popen(); a running checker process used
249
to see if the client lives.
250
'None' if no process is running.
65
251
checker_initiator_tag: a gobject event source tag, or None
66
stop_initiator_tag: - '' -
252
disable_initiator_tag: - '' -
67
253
checker_callback_tag: - '' -
68
254
checker_command: string; External command which is run to check if
69
client lives. %()s expansions are done at
255
client lives. %() expansions are done at
70
256
runtime with vars(self) as dict, so that for
71
257
instance %(name)s can be used in the command.
73
_timeout: Real variable for 'timeout'
74
_interval: Real variable for 'interval'
75
_timeout_milliseconds: Used by gobject.timeout_add()
76
_interval_milliseconds: - '' -
258
current_checker_command: string; current running checker_command
78
def _set_timeout(self, timeout):
79
"Setter function for 'timeout' attribute"
80
self._timeout = timeout
81
self._timeout_milliseconds = ((self.timeout.days
82
* 24 * 60 * 60 * 1000)
83
+ (self.timeout.seconds * 1000)
84
+ (self.timeout.microseconds
86
timeout = property(lambda self: self._timeout,
89
def _set_interval(self, interval):
90
"Setter function for 'interval' attribute"
91
self._interval = interval
92
self._interval_milliseconds = ((self.interval.days
93
* 24 * 60 * 60 * 1000)
94
+ (self.interval.seconds
96
+ (self.interval.microseconds
98
interval = property(lambda self: self._interval,
101
def __init__(self, name=None, options=None, stop_hook=None,
102
fingerprint=None, secret=None, secfile=None, fqdn=None,
103
timeout=None, interval=-1, checker=None):
262
def _timedelta_to_milliseconds(td):
263
"Convert a datetime.timedelta() to milliseconds"
264
return ((td.days * 24 * 60 * 60 * 1000)
265
+ (td.seconds * 1000)
266
+ (td.microseconds // 1000))
268
def timeout_milliseconds(self):
269
"Return the 'timeout' attribute in milliseconds"
270
return self._timedelta_to_milliseconds(self.timeout)
272
def interval_milliseconds(self):
273
"Return the 'interval' attribute in milliseconds"
274
return self._timedelta_to_milliseconds(self.interval)
276
def __init__(self, name = None, disable_hook=None, config=None):
277
"""Note: the 'checker' key in 'config' sets the
278
'checker_command' attribute and *not* the 'checker'
105
# Uppercase and remove spaces from fingerprint
106
# for later comparison purposes with return value of
107
# the fingerprint() function
108
self.fingerprint = fingerprint.upper().replace(u" ", u"")
110
self.secret = secret.decode(u"base64")
113
self.secret = sf.read()
116
raise RuntimeError(u"No secret or secfile for client %s"
118
self.fqdn = fqdn # string
119
self.created = datetime.datetime.now()
120
self.last_seen = None
122
timeout = options.timeout
123
self.timeout = timeout
125
interval = options.interval
127
interval = string_to_delta(interval)
128
self.interval = interval
129
self.stop_hook = stop_hook
283
logger.debug(u"Creating client %r", self.name)
284
# Uppercase and remove spaces from fingerprint for later
285
# comparison purposes with return value from the fingerprint()
287
self.fingerprint = (config[u"fingerprint"].upper()
289
logger.debug(u" Fingerprint: %s", self.fingerprint)
290
if u"secret" in config:
291
self.secret = config[u"secret"].decode(u"base64")
292
elif u"secfile" in config:
293
with closing(open(os.path.expanduser
295
(config[u"secfile"])),
297
self.secret = secfile.read()
299
raise TypeError(u"No secret or secfile for client %s"
301
self.host = config.get(u"host", u"")
302
self.created = datetime.datetime.utcnow()
304
self.last_enabled = None
305
self.last_checked_ok = None
306
self.timeout = string_to_delta(config[u"timeout"])
307
self.interval = string_to_delta(config[u"interval"])
308
self.disable_hook = disable_hook
130
309
self.checker = None
131
310
self.checker_initiator_tag = None
132
self.stop_initiator_tag = None
311
self.disable_initiator_tag = None
133
312
self.checker_callback_tag = None
134
self.check_command = checker
136
"""Start this clients checker and timeout hooks"""
313
self.checker_command = config[u"checker"]
314
self.current_checker_command = None
315
self.last_connect = None
318
"""Start this client's checker and timeout hooks"""
319
if getattr(self, u"enabled", False):
322
self.last_enabled = datetime.datetime.utcnow()
137
323
# Schedule a new checker to be started an 'interval' from now,
138
324
# and every interval from then on.
139
self.checker_initiator_tag = gobject.timeout_add\
140
(self._interval_milliseconds,
325
self.checker_initiator_tag = (gobject.timeout_add
326
(self.interval_milliseconds(),
142
328
# Also start a new checker *right now*.
143
329
self.start_checker()
144
# Schedule a stop() when 'timeout' has passed
145
self.stop_initiator_tag = gobject.timeout_add\
146
(self._timeout_milliseconds,
150
The possibility that this client might be restarted is left
151
open, but not currently used."""
153
sys.stderr.write(u"Stopping client %s\n" % self.name)
155
if self.stop_initiator_tag:
156
gobject.source_remove(self.stop_initiator_tag)
157
self.stop_initiator_tag = None
158
if self.checker_initiator_tag:
330
# Schedule a disable() when 'timeout' has passed
331
self.disable_initiator_tag = (gobject.timeout_add
332
(self.timeout_milliseconds(),
337
"""Disable this client."""
338
if not getattr(self, "enabled", False):
340
logger.info(u"Disabling client %s", self.name)
341
if getattr(self, u"disable_initiator_tag", False):
342
gobject.source_remove(self.disable_initiator_tag)
343
self.disable_initiator_tag = None
344
if getattr(self, u"checker_initiator_tag", False):
159
345
gobject.source_remove(self.checker_initiator_tag)
160
346
self.checker_initiator_tag = None
161
347
self.stop_checker()
348
if self.disable_hook:
349
self.disable_hook(self)
164
351
# Do not run this again if called by a gobject.timeout_add
166
354
def __del__(self):
167
# Some code duplication here and in stop()
168
if hasattr(self, "stop_initiator_tag") \
169
and self.stop_initiator_tag:
170
gobject.source_remove(self.stop_initiator_tag)
171
self.stop_initiator_tag = None
172
if hasattr(self, "checker_initiator_tag") \
173
and self.checker_initiator_tag:
174
gobject.source_remove(self.checker_initiator_tag)
175
self.checker_initiator_tag = None
177
def checker_callback(self, pid, condition):
355
self.disable_hook = None
358
def checker_callback(self, pid, condition, command):
178
359
"""The checker has completed, so take appropriate actions."""
179
now = datetime.datetime.now()
180
if os.WIFEXITED(condition) \
181
and (os.WEXITSTATUS(condition) == 0):
183
sys.stderr.write(u"Checker for %(name)s succeeded\n"
186
gobject.source_remove(self.stop_initiator_tag)
187
self.stop_initiator_tag = gobject.timeout_add\
188
(self._timeout_milliseconds,
191
if not os.WIFEXITED(condition):
192
sys.stderr.write(u"Checker for %(name)s crashed?\n"
360
self.checker_callback_tag = None
362
if os.WIFEXITED(condition):
363
exitstatus = os.WEXITSTATUS(condition)
365
logger.info(u"Checker for %(name)s succeeded",
195
sys.stderr.write(u"Checker for %(name)s failed\n"
198
self.checker_callback_tag = None
369
logger.info(u"Checker for %(name)s failed",
372
logger.warning(u"Checker for %(name)s crashed?",
375
def checked_ok(self):
376
"""Bump up the timeout for this client.
378
This should only be called when the client has been seen,
381
self.last_checked_ok = datetime.datetime.utcnow()
382
gobject.source_remove(self.disable_initiator_tag)
383
self.disable_initiator_tag = (gobject.timeout_add
384
(self.timeout_milliseconds(),
199
387
def start_checker(self):
200
388
"""Start a new checker subprocess if one is not running.
201
390
If a checker already exists, leave it running and do
392
# The reason for not killing a running checker is that if we
393
# did that, then if a checker (for some reason) started
394
# running slowly and taking more than 'interval' time, the
395
# client would inevitably timeout, since no checker would get
396
# a chance to run to completion. If we instead leave running
397
# checkers alone, the checker would have to take more time
398
# than 'timeout' for the client to be declared invalid, which
399
# is as it should be.
401
# If a checker exists, make sure it is not a zombie
403
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
404
except (AttributeError, OSError), error:
405
if (isinstance(error, OSError)
406
and error.errno != errno.ECHILD):
410
logger.warning(u"Checker was a zombie")
411
gobject.source_remove(self.checker_callback_tag)
412
self.checker_callback(pid, status,
413
self.current_checker_command)
414
# Start a new checker if needed
203
415
if self.checker is None:
205
sys.stderr.write(u"Starting checker for %s\n"
208
command = self.check_command % self.fqdn
417
# In case checker_command has exactly one % operator
418
command = self.checker_command % self.host
209
419
except TypeError:
210
escaped_attrs = dict((key, re.escape(str(val)))
420
# Escape attributes for the shell
421
escaped_attrs = dict((key,
422
re.escape(unicode(str(val),
212
426
vars(self).iteritems())
213
command = self.check_command % escaped_attrs
428
command = self.checker_command % escaped_attrs
429
except TypeError, error:
430
logger.error(u'Could not format string "%s":'
431
u' %s', self.checker_command, error)
432
return True # Try again later
433
self.current_checker_command = command
215
self.checker = subprocess.\
217
stdout=subprocess.PIPE,
218
close_fds=True, shell=True,
220
self.checker_callback_tag = gobject.\
221
child_watch_add(self.checker.pid,
224
except subprocess.OSError, error:
225
sys.stderr.write(u"Failed to start subprocess: %s\n"
435
logger.info(u"Starting checker %r for %s",
437
# We don't need to redirect stdout and stderr, since
438
# in normal mode, that is already done by daemon(),
439
# and in debug mode we don't want to. (Stdin is
440
# always replaced by /dev/null.)
441
self.checker = subprocess.Popen(command,
443
shell=True, cwd=u"/")
444
self.checker_callback_tag = (gobject.child_watch_add
446
self.checker_callback,
448
# The checker may have completed before the gobject
449
# watch was added. Check for this.
450
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
452
gobject.source_remove(self.checker_callback_tag)
453
self.checker_callback(pid, status, command)
454
except OSError, error:
455
logger.error(u"Failed to start subprocess: %s",
227
457
# Re-run this periodically if run by gobject.timeout_add
229
460
def stop_checker(self):
230
461
"""Force the checker process, if any, to stop."""
231
if not hasattr(self, "checker") or self.checker is None:
462
if self.checker_callback_tag:
463
gobject.source_remove(self.checker_callback_tag)
464
self.checker_callback_tag = None
465
if getattr(self, u"checker", None) is None:
233
gobject.source_remove(self.checker_callback_tag)
234
self.checker_callback_tag = None
235
os.kill(self.checker.pid, signal.SIGTERM)
236
if self.checker.poll() is None:
237
os.kill(self.checker.pid, signal.SIGKILL)
467
logger.debug(u"Stopping checker for %(name)s", vars(self))
469
os.kill(self.checker.pid, signal.SIGTERM)
471
#if self.checker.poll() is None:
472
# os.kill(self.checker.pid, signal.SIGKILL)
473
except OSError, error:
474
if error.errno != errno.ESRCH: # No such process
238
476
self.checker = None
239
def still_valid(self, now=None):
478
def still_valid(self):
240
479
"""Has the timeout not yet passed for this client?"""
242
now = datetime.datetime.now()
243
if self.last_seen is None:
480
if not getattr(self, u"enabled", False):
482
now = datetime.datetime.utcnow()
483
if self.last_checked_ok is None:
244
484
return now < (self.created + self.timeout)
246
return now < (self.last_seen + self.timeout)
249
def peer_certificate(session):
250
# If not an OpenPGP certificate...
251
if gnutls.library.functions.gnutls_certificate_type_get\
252
(session._c_object) \
253
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP:
254
# ...do the normal thing
255
return session.peer_certificate
256
list_size = ctypes.c_uint()
257
cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
258
(session._c_object, ctypes.byref(list_size))
259
if list_size.value == 0:
262
return ctypes.string_at(cert.data, cert.size)
265
def fingerprint(openpgp):
266
# New empty GnuTLS certificate
267
crt = gnutls.library.types.gnutls_openpgp_crt_t()
268
gnutls.library.functions.gnutls_openpgp_crt_init\
270
# New GnuTLS "datum" with the OpenPGP public key
271
datum = gnutls.library.types.gnutls_datum_t\
272
(ctypes.cast(ctypes.c_char_p(openpgp),
273
ctypes.POINTER(ctypes.c_ubyte)),
274
ctypes.c_uint(len(openpgp)))
275
# Import the OpenPGP public key into the certificate
276
ret = gnutls.library.functions.gnutls_openpgp_crt_import\
279
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
280
# New buffer for the fingerprint
281
buffer = ctypes.create_string_buffer(20)
282
buffer_length = ctypes.c_size_t()
283
# Get the fingerprint from the certificate into the buffer
284
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
285
(crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
286
# Deinit the certificate
287
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
288
# Convert the buffer to a Python bytestring
289
fpr = ctypes.string_at(buffer, buffer_length.value)
290
# Convert the bytestring to hexadecimal notation
291
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
295
class tcp_handler(SocketServer.BaseRequestHandler, object):
296
"""A TCP request handler class.
297
Instantiated by IPv6_TCPServer for each request to handle it.
486
return now < (self.last_checked_ok + self.timeout)
489
def dbus_service_property(dbus_interface, signature=u"v",
490
access=u"readwrite", byte_arrays=False):
491
"""Decorators for marking methods of a DBusObjectWithProperties to
492
become properties on the D-Bus.
494
The decorated method will be called with no arguments by "Get"
495
and with one argument by "Set".
497
The parameters, where they are supported, are the same as
498
dbus.service.method, except there is only "signature", since the
499
type from Get() and the type sent to Set() is the same.
502
func._dbus_is_property = True
503
func._dbus_interface = dbus_interface
504
func._dbus_signature = signature
505
func._dbus_access = access
506
func._dbus_name = func.__name__
507
if func._dbus_name.endswith(u"_dbus_property"):
508
func._dbus_name = func._dbus_name[:-14]
509
func._dbus_get_args_options = {u'byte_arrays': byte_arrays }
514
class DBusPropertyException(dbus.exceptions.DBusException):
515
"""A base class for D-Bus property-related exceptions
517
def __unicode__(self):
518
return unicode(str(self))
521
class DBusPropertyAccessException(DBusPropertyException):
522
"""A property's access permissions disallows an operation.
527
class DBusPropertyNotFound(DBusPropertyException):
528
"""An attempt was made to access a non-existing property.
533
class DBusObjectWithProperties(dbus.service.Object):
534
"""A D-Bus object with properties.
536
Classes inheriting from this can use the dbus_service_property
537
decorator to expose methods as D-Bus properties. It exposes the
538
standard Get(), Set(), and GetAll() methods on the D-Bus.
542
def _is_dbus_property(obj):
543
return getattr(obj, u"_dbus_is_property", False)
545
def _get_all_dbus_properties(self):
546
"""Returns a generator of (name, attribute) pairs
548
return ((prop._dbus_name, prop)
550
inspect.getmembers(self, self._is_dbus_property))
552
def _get_dbus_property(self, interface_name, property_name):
553
"""Returns a bound method if one exists which is a D-Bus
554
property with the specified name and interface.
556
for name in (property_name,
557
property_name + u"_dbus_property"):
558
prop = getattr(self, name, None)
560
or not self._is_dbus_property(prop)
561
or prop._dbus_name != property_name
562
or (interface_name and prop._dbus_interface
563
and interface_name != prop._dbus_interface)):
567
raise DBusPropertyNotFound(self.dbus_object_path + u":"
568
+ interface_name + u"."
571
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ss",
573
def Get(self, interface_name, property_name):
574
"""Standard D-Bus property Get() method, see D-Bus standard.
576
prop = self._get_dbus_property(interface_name, property_name)
577
if prop._dbus_access == u"write":
578
raise DBusPropertyAccessException(property_name)
580
if not hasattr(value, u"variant_level"):
582
return type(value)(value, variant_level=value.variant_level+1)
584
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"ssv")
585
def Set(self, interface_name, property_name, value):
586
"""Standard D-Bus property Set() method, see D-Bus standard.
588
prop = self._get_dbus_property(interface_name, property_name)
589
if prop._dbus_access == u"read":
590
raise DBusPropertyAccessException(property_name)
591
if prop._dbus_get_args_options[u"byte_arrays"]:
592
value = dbus.ByteArray(''.join(unichr(byte)
596
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature=u"s",
597
out_signature=u"a{sv}")
598
def GetAll(self, interface_name):
599
"""Standard D-Bus property GetAll() method, see D-Bus
602
Note: Will not include properties with access="write".
605
for name, prop in self._get_all_dbus_properties():
607
and interface_name != prop._dbus_interface):
608
# Interface non-empty but did not match
610
# Ignore write-only properties
611
if prop._dbus_access == u"write":
614
if not hasattr(value, u"variant_level"):
617
all[name] = type(value)(value, variant_level=
618
value.variant_level+1)
619
return dbus.Dictionary(all, signature=u"sv")
621
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
623
path_keyword='object_path',
624
connection_keyword='connection')
625
def Introspect(self, object_path, connection):
626
"""Standard D-Bus method, overloaded to insert property tags.
628
xmlstring = dbus.service.Object.Introspect(self, object_path,
631
document = xml.dom.minidom.parseString(xmlstring)
632
def make_tag(document, name, prop):
633
e = document.createElement(u"property")
634
e.setAttribute(u"name", name)
635
e.setAttribute(u"type", prop._dbus_signature)
636
e.setAttribute(u"access", prop._dbus_access)
638
for if_tag in document.getElementsByTagName(u"interface"):
639
for tag in (make_tag(document, name, prop)
641
in self._get_all_dbus_properties()
642
if prop._dbus_interface
643
== if_tag.getAttribute(u"name")):
644
if_tag.appendChild(tag)
645
# Add the names to the return values for the
646
# "org.freedesktop.DBus.Properties" methods
647
if (if_tag.getAttribute(u"name")
648
== u"org.freedesktop.DBus.Properties"):
649
for cn in if_tag.getElementsByTagName(u"method"):
650
if cn.getAttribute(u"name") == u"Get":
651
for arg in cn.getElementsByTagName(u"arg"):
652
if (arg.getAttribute(u"direction")
654
arg.setAttribute(u"name", u"value")
655
elif cn.getAttribute(u"name") == u"GetAll":
656
for arg in cn.getElementsByTagName(u"arg"):
657
if (arg.getAttribute(u"direction")
659
arg.setAttribute(u"name", u"props")
660
xmlstring = document.toxml(u"utf-8")
662
except (AttributeError, xml.dom.DOMException,
663
xml.parsers.expat.ExpatError), error:
664
logger.error(u"Failed to override Introspection method",
669
class ClientDBus(Client, DBusObjectWithProperties):
670
"""A Client class using D-Bus
673
dbus_object_path: dbus.ObjectPath
674
bus: dbus.SystemBus()
676
# dbus.service.Object doesn't use super(), so we can't either.
678
def __init__(self, bus = None, *args, **kwargs):
680
Client.__init__(self, *args, **kwargs)
681
# Only now, when this client is initialized, can it show up on
683
self.dbus_object_path = (dbus.ObjectPath
685
+ self.name.replace(u".", u"_")))
686
DBusObjectWithProperties.__init__(self, self.bus,
687
self.dbus_object_path)
690
def _datetime_to_dbus(dt, variant_level=0):
691
"""Convert a UTC datetime.datetime() to a D-Bus type."""
692
return dbus.String(dt.isoformat(),
693
variant_level=variant_level)
696
oldstate = getattr(self, u"enabled", False)
697
r = Client.enable(self)
698
if oldstate != self.enabled:
700
self.PropertyChanged(dbus.String(u"enabled"),
701
dbus.Boolean(True, variant_level=1))
702
self.PropertyChanged(
703
dbus.String(u"last_enabled"),
704
self._datetime_to_dbus(self.last_enabled,
708
def disable(self, signal = True):
709
oldstate = getattr(self, u"enabled", False)
710
r = Client.disable(self)
711
if signal and oldstate != self.enabled:
713
self.PropertyChanged(dbus.String(u"enabled"),
714
dbus.Boolean(False, variant_level=1))
717
def __del__(self, *args, **kwargs):
719
self.remove_from_connection()
722
if hasattr(DBusObjectWithProperties, u"__del__"):
723
DBusObjectWithProperties.__del__(self, *args, **kwargs)
724
Client.__del__(self, *args, **kwargs)
726
def checker_callback(self, pid, condition, command,
728
self.checker_callback_tag = None
731
self.PropertyChanged(dbus.String(u"checker_running"),
732
dbus.Boolean(False, variant_level=1))
733
if os.WIFEXITED(condition):
734
exitstatus = os.WEXITSTATUS(condition)
736
self.CheckerCompleted(dbus.Int16(exitstatus),
737
dbus.Int64(condition),
738
dbus.String(command))
741
self.CheckerCompleted(dbus.Int16(-1),
742
dbus.Int64(condition),
743
dbus.String(command))
745
return Client.checker_callback(self, pid, condition, command,
748
def checked_ok(self, *args, **kwargs):
749
r = Client.checked_ok(self, *args, **kwargs)
751
self.PropertyChanged(
752
dbus.String(u"last_checked_ok"),
753
(self._datetime_to_dbus(self.last_checked_ok,
757
def start_checker(self, *args, **kwargs):
758
old_checker = self.checker
759
if self.checker is not None:
760
old_checker_pid = self.checker.pid
762
old_checker_pid = None
763
r = Client.start_checker(self, *args, **kwargs)
764
# Only if new checker process was started
765
if (self.checker is not None
766
and old_checker_pid != self.checker.pid):
768
self.CheckerStarted(self.current_checker_command)
769
self.PropertyChanged(
770
dbus.String(u"checker_running"),
771
dbus.Boolean(True, variant_level=1))
774
def stop_checker(self, *args, **kwargs):
775
old_checker = getattr(self, u"checker", None)
776
r = Client.stop_checker(self, *args, **kwargs)
777
if (old_checker is not None
778
and getattr(self, u"checker", None) is None):
779
self.PropertyChanged(dbus.String(u"checker_running"),
780
dbus.Boolean(False, variant_level=1))
783
## D-Bus methods & signals
784
_interface = u"se.bsnet.fukt.Mandos.Client"
787
@dbus.service.method(_interface)
789
return self.checked_ok()
791
# CheckerCompleted - signal
792
@dbus.service.signal(_interface, signature=u"nxs")
793
def CheckerCompleted(self, exitcode, waitstatus, command):
797
# CheckerStarted - signal
798
@dbus.service.signal(_interface, signature=u"s")
799
def CheckerStarted(self, command):
803
# PropertyChanged - signal
804
@dbus.service.signal(_interface, signature=u"sv")
805
def PropertyChanged(self, property, value):
810
@dbus.service.signal(_interface)
816
@dbus.service.signal(_interface)
822
@dbus.service.method(_interface)
827
# StartChecker - method
828
@dbus.service.method(_interface)
829
def StartChecker(self):
834
@dbus.service.method(_interface)
839
# StopChecker - method
840
@dbus.service.method(_interface)
841
def StopChecker(self):
845
@dbus_service_property(_interface, signature=u"s", access=u"read")
846
def name_dbus_property(self):
847
return dbus.String(self.name)
849
# fingerprint - property
850
@dbus_service_property(_interface, signature=u"s", access=u"read")
851
def fingerprint_dbus_property(self):
852
return dbus.String(self.fingerprint)
855
@dbus_service_property(_interface, signature=u"s",
857
def host_dbus_property(self, value=None):
858
if value is None: # get
859
return dbus.String(self.host)
862
self.PropertyChanged(dbus.String(u"host"),
863
dbus.String(value, variant_level=1))
866
@dbus_service_property(_interface, signature=u"s", access=u"read")
867
def created_dbus_property(self):
868
return dbus.String(self._datetime_to_dbus(self.created))
870
# last_enabled - property
871
@dbus_service_property(_interface, signature=u"s", access=u"read")
872
def last_enabled_dbus_property(self):
873
if self.last_enabled is None:
874
return dbus.String(u"")
875
return dbus.String(self._datetime_to_dbus(self.last_enabled))
878
@dbus_service_property(_interface, signature=u"b",
880
def enabled_dbus_property(self, value=None):
881
if value is None: # get
882
return dbus.Boolean(self.enabled)
888
# last_checked_ok - property
889
@dbus_service_property(_interface, signature=u"s",
891
def last_checked_ok_dbus_property(self, value=None):
892
if value is not None:
895
if self.last_checked_ok is None:
896
return dbus.String(u"")
897
return dbus.String(self._datetime_to_dbus(self
901
@dbus_service_property(_interface, signature=u"t",
903
def timeout_dbus_property(self, value=None):
904
if value is None: # get
905
return dbus.UInt64(self.timeout_milliseconds())
906
self.timeout = datetime.timedelta(0, 0, 0, value)
908
self.PropertyChanged(dbus.String(u"timeout"),
909
dbus.UInt64(value, variant_level=1))
910
if getattr(self, u"disable_initiator_tag", None) is None:
913
gobject.source_remove(self.disable_initiator_tag)
914
self.disable_initiator_tag = None
916
_timedelta_to_milliseconds((self
922
# The timeout has passed
925
self.disable_initiator_tag = (gobject.timeout_add
926
(time_to_die, self.disable))
928
# interval - property
929
@dbus_service_property(_interface, signature=u"t",
931
def interval_dbus_property(self, value=None):
932
if value is None: # get
933
return dbus.UInt64(self.interval_milliseconds())
934
self.interval = datetime.timedelta(0, 0, 0, value)
936
self.PropertyChanged(dbus.String(u"interval"),
937
dbus.UInt64(value, variant_level=1))
938
if getattr(self, u"checker_initiator_tag", None) is None:
940
# Reschedule checker run
941
gobject.source_remove(self.checker_initiator_tag)
942
self.checker_initiator_tag = (gobject.timeout_add
943
(value, self.start_checker))
944
self.start_checker() # Start one now, too
947
@dbus_service_property(_interface, signature=u"s",
949
def checker_dbus_property(self, value=None):
950
if value is None: # get
951
return dbus.String(self.checker_command)
952
self.checker_command = value
954
self.PropertyChanged(dbus.String(u"checker"),
955
dbus.String(self.checker_command,
958
# checker_running - property
959
@dbus_service_property(_interface, signature=u"b",
961
def checker_running_dbus_property(self, value=None):
962
if value is None: # get
963
return dbus.Boolean(self.checker is not None)
969
# object_path - property
970
@dbus_service_property(_interface, signature=u"o", access=u"read")
971
def object_path_dbus_property(self):
972
return self.dbus_object_path # is already a dbus.ObjectPath
975
@dbus_service_property(_interface, signature=u"ay",
976
access=u"write", byte_arrays=True)
977
def secret_dbus_property(self, value):
978
self.secret = str(value)
983
class ClientHandler(socketserver.BaseRequestHandler, object):
984
"""A class to handle client connections.
986
Instantiated once for each connection to handle it.
298
987
Note: This will run in its own forked process."""
300
989
def handle(self):
302
sys.stderr.write(u"TCP request came\n")
303
sys.stderr.write(u"Request: %s\n" % self.request)
304
sys.stderr.write(u"Client Address: %s\n"
305
% unicode(self.client_address))
306
sys.stderr.write(u"Server: %s\n" % self.server)
307
session = gnutls.connection.ClientSession(self.request,
311
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
312
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
314
priority = "SECURE256"
316
gnutls.library.functions.gnutls_priority_set_direct\
317
(session._c_object, priority, None);
321
except gnutls.errors.GNUTLSError, error:
323
sys.stderr.write(u"Handshake failed: %s\n" % error)
324
# Do not run session.bye() here: the session is not
325
# established. Just abandon the request.
328
fpr = fingerprint(peer_certificate(session))
329
except (TypeError, gnutls.errors.GNUTLSError), error:
331
sys.stderr.write(u"Bad certificate: %s\n" % error)
335
sys.stderr.write(u"Fingerprint: %s\n" % fpr)
338
if c.fingerprint == fpr:
341
# Have to check if client.still_valid(), since it is possible
342
# that the client timed out while establishing the GnuTLS
344
if (not client) or (not client.still_valid()):
347
sys.stderr.write(u"Client %(name)s is invalid\n"
350
sys.stderr.write(u"Client not found for "
351
u"fingerprint: %s\n" % fpr)
355
while sent_size < len(client.secret):
356
sent = session.send(client.secret[sent_size:])
358
sys.stderr.write(u"Sent: %d, remaining: %d\n"
359
% (sent, len(client.secret)
360
- (sent_size + sent)))
365
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
366
"""IPv6 TCP server. Accepts 'None' as address and/or port.
990
logger.info(u"TCP connection from: %s",
991
unicode(self.client_address))
992
logger.debug(u"IPC Pipe FD: %d", self.server.pipe[1])
993
# Open IPC pipe to parent process
994
with closing(os.fdopen(self.server.pipe[1], u"w", 1)) as ipc:
995
session = (gnutls.connection
996
.ClientSession(self.request,
1000
line = self.request.makefile().readline()
1001
logger.debug(u"Protocol version: %r", line)
1003
if int(line.strip().split()[0]) > 1:
1005
except (ValueError, IndexError, RuntimeError), error:
1006
logger.error(u"Unknown protocol version: %s", error)
1009
# Note: gnutls.connection.X509Credentials is really a
1010
# generic GnuTLS certificate credentials object so long as
1011
# no X.509 keys are added to it. Therefore, we can use it
1012
# here despite using OpenPGP certificates.
1014
#priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
1015
# u"+AES-256-CBC", u"+SHA1",
1016
# u"+COMP-NULL", u"+CTYPE-OPENPGP",
1018
# Use a fallback default, since this MUST be set.
1019
priority = self.server.gnutls_priority
1020
if priority is None:
1021
priority = u"NORMAL"
1022
(gnutls.library.functions
1023
.gnutls_priority_set_direct(session._c_object,
1028
except gnutls.errors.GNUTLSError, error:
1029
logger.warning(u"Handshake failed: %s", error)
1030
# Do not run session.bye() here: the session is not
1031
# established. Just abandon the request.
1033
logger.debug(u"Handshake succeeded")
1035
fpr = self.fingerprint(self.peer_certificate(session))
1036
except (TypeError, gnutls.errors.GNUTLSError), error:
1037
logger.warning(u"Bad certificate: %s", error)
1040
logger.debug(u"Fingerprint: %s", fpr)
1042
for c in self.server.clients:
1043
if c.fingerprint == fpr:
1047
ipc.write(u"NOTFOUND %s %s\n"
1048
% (fpr, unicode(self.client_address)))
1051
# Have to check if client.still_valid(), since it is
1052
# possible that the client timed out while establishing
1053
# the GnuTLS session.
1054
if not client.still_valid():
1055
ipc.write(u"INVALID %s\n" % client.name)
1058
ipc.write(u"SENDING %s\n" % client.name)
1060
while sent_size < len(client.secret):
1061
sent = session.send(client.secret[sent_size:])
1062
logger.debug(u"Sent: %d, remaining: %d",
1063
sent, len(client.secret)
1064
- (sent_size + sent))
1069
def peer_certificate(session):
1070
"Return the peer's OpenPGP certificate as a bytestring"
1071
# If not an OpenPGP certificate...
1072
if (gnutls.library.functions
1073
.gnutls_certificate_type_get(session._c_object)
1074
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1075
# ...do the normal thing
1076
return session.peer_certificate
1077
list_size = ctypes.c_uint(1)
1078
cert_list = (gnutls.library.functions
1079
.gnutls_certificate_get_peers
1080
(session._c_object, ctypes.byref(list_size)))
1081
if not bool(cert_list) and list_size.value != 0:
1082
raise gnutls.errors.GNUTLSError(u"error getting peer"
1084
if list_size.value == 0:
1087
return ctypes.string_at(cert.data, cert.size)
1090
def fingerprint(openpgp):
1091
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1092
# New GnuTLS "datum" with the OpenPGP public key
1093
datum = (gnutls.library.types
1094
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1097
ctypes.c_uint(len(openpgp))))
1098
# New empty GnuTLS certificate
1099
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1100
(gnutls.library.functions
1101
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1102
# Import the OpenPGP public key into the certificate
1103
(gnutls.library.functions
1104
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1105
gnutls.library.constants
1106
.GNUTLS_OPENPGP_FMT_RAW))
1107
# Verify the self signature in the key
1108
crtverify = ctypes.c_uint()
1109
(gnutls.library.functions
1110
.gnutls_openpgp_crt_verify_self(crt, 0,
1111
ctypes.byref(crtverify)))
1112
if crtverify.value != 0:
1113
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1114
raise (gnutls.errors.CertificateSecurityError
1116
# New buffer for the fingerprint
1117
buf = ctypes.create_string_buffer(20)
1118
buf_len = ctypes.c_size_t()
1119
# Get the fingerprint from the certificate into the buffer
1120
(gnutls.library.functions
1121
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1122
ctypes.byref(buf_len)))
1123
# Deinit the certificate
1124
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1125
# Convert the buffer to a Python bytestring
1126
fpr = ctypes.string_at(buf, buf_len.value)
1127
# Convert the bytestring to hexadecimal notation
1128
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
1132
class ForkingMixInWithPipe(socketserver.ForkingMixIn, object):
1133
"""Like socketserver.ForkingMixIn, but also pass a pipe."""
1134
def process_request(self, request, client_address):
1135
"""Overrides and wraps the original process_request().
1137
This function creates a new pipe in self.pipe
1139
self.pipe = os.pipe()
1140
super(ForkingMixInWithPipe,
1141
self).process_request(request, client_address)
1142
os.close(self.pipe[1]) # close write end
1143
self.add_pipe(self.pipe[0])
1144
def add_pipe(self, pipe):
1145
"""Dummy function; override as necessary"""
1149
class IPv6_TCPServer(ForkingMixInWithPipe,
1150
socketserver.TCPServer, object):
1151
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
368
options: Command line options
369
clients: Set() of Client objects
1154
enabled: Boolean; whether this server is activated yet
1155
interface: None or a network interface name (string)
1156
use_ipv6: Boolean; to use IPv6 or not
371
address_family = socket.AF_INET6
372
def __init__(self, *args, **kwargs):
373
if "options" in kwargs:
374
self.options = kwargs["options"]
375
del kwargs["options"]
376
if "clients" in kwargs:
377
self.clients = kwargs["clients"]
378
del kwargs["clients"]
379
return super(type(self), self).__init__(*args, **kwargs)
1158
def __init__(self, server_address, RequestHandlerClass,
1159
interface=None, use_ipv6=True):
1160
self.interface = interface
1162
self.address_family = socket.AF_INET6
1163
socketserver.TCPServer.__init__(self, server_address,
1164
RequestHandlerClass)
380
1165
def server_bind(self):
381
1166
"""This overrides the normal server_bind() function
382
1167
to bind to an interface if one was specified, and also NOT to
383
1168
bind to an address or port if they were not specified."""
384
if self.options.interface:
385
if not hasattr(socket, "SO_BINDTODEVICE"):
386
# From /usr/include/asm-i486/socket.h
387
socket.SO_BINDTODEVICE = 25
389
self.socket.setsockopt(socket.SOL_SOCKET,
390
socket.SO_BINDTODEVICE,
391
self.options.interface)
392
except socket.error, error:
393
if error[0] == errno.EPERM:
394
sys.stderr.write(u"Warning: No permission to" \
395
u" bind to interface %s\n"
396
% self.options.interface)
1169
if self.interface is not None:
1170
if SO_BINDTODEVICE is None:
1171
logger.error(u"SO_BINDTODEVICE does not exist;"
1172
u" cannot bind to interface %s",
1176
self.socket.setsockopt(socket.SOL_SOCKET,
1180
except socket.error, error:
1181
if error[0] == errno.EPERM:
1182
logger.error(u"No permission to"
1183
u" bind to interface %s",
1185
elif error[0] == errno.ENOPROTOOPT:
1186
logger.error(u"SO_BINDTODEVICE not available;"
1187
u" cannot bind to interface %s",
399
1191
# Only bind(2) the socket if we really need to.
400
1192
if self.server_address[0] or self.server_address[1]:
401
1193
if not self.server_address[0]:
403
self.server_address = (in6addr_any,
1194
if self.address_family == socket.AF_INET6:
1195
any_address = u"::" # in6addr_any
1197
any_address = socket.INADDR_ANY
1198
self.server_address = (any_address,
404
1199
self.server_address[1])
405
elif self.server_address[1] is None:
1200
elif not self.server_address[1]:
406
1201
self.server_address = (self.server_address[0],
408
return super(type(self), self).server_bind()
1203
# if self.interface:
1204
# self.server_address = (self.server_address[0],
1209
return socketserver.TCPServer.server_bind(self)
1212
class MandosServer(IPv6_TCPServer):
1216
clients: set of Client objects
1217
gnutls_priority GnuTLS priority string
1218
use_dbus: Boolean; to emit D-Bus signals or not
1220
Assumes a gobject.MainLoop event loop.
1222
def __init__(self, server_address, RequestHandlerClass,
1223
interface=None, use_ipv6=True, clients=None,
1224
gnutls_priority=None, use_dbus=True):
1225
self.enabled = False
1226
self.clients = clients
1227
if self.clients is None:
1228
self.clients = set()
1229
self.use_dbus = use_dbus
1230
self.gnutls_priority = gnutls_priority
1231
IPv6_TCPServer.__init__(self, server_address,
1232
RequestHandlerClass,
1233
interface = interface,
1234
use_ipv6 = use_ipv6)
1235
def server_activate(self):
1237
return socketserver.TCPServer.server_activate(self)
1240
def add_pipe(self, pipe):
1241
# Call "handle_ipc" for both data and EOF events
1242
gobject.io_add_watch(pipe, gobject.IO_IN | gobject.IO_HUP,
1244
def handle_ipc(self, source, condition, file_objects={}):
1246
gobject.IO_IN: u"IN", # There is data to read.
1247
gobject.IO_OUT: u"OUT", # Data can be written (without
1249
gobject.IO_PRI: u"PRI", # There is urgent data to read.
1250
gobject.IO_ERR: u"ERR", # Error condition.
1251
gobject.IO_HUP: u"HUP" # Hung up (the connection has been
1252
# broken, usually for pipes and
1255
conditions_string = ' | '.join(name
1257
condition_names.iteritems()
1258
if cond & condition)
1259
logger.debug(u"Handling IPC: FD = %d, condition = %s", source,
1262
# Turn the pipe file descriptor into a Python file object
1263
if source not in file_objects:
1264
file_objects[source] = os.fdopen(source, u"r", 1)
1266
# Read a line from the file object
1267
cmdline = file_objects[source].readline()
1268
if not cmdline: # Empty line means end of file
1269
# close the IPC pipe
1270
file_objects[source].close()
1271
del file_objects[source]
1273
# Stop calling this function
1276
logger.debug(u"IPC command: %r", cmdline)
1278
# Parse and act on command
1279
cmd, args = cmdline.rstrip(u"\r\n").split(None, 1)
1281
if cmd == u"NOTFOUND":
1282
logger.warning(u"Client not found for fingerprint: %s",
1286
mandos_dbus_service.ClientNotFound(args)
1287
elif cmd == u"INVALID":
1288
for client in self.clients:
1289
if client.name == args:
1290
logger.warning(u"Client %s is invalid", args)
1296
logger.error(u"Unknown client %s is invalid", args)
1297
elif cmd == u"SENDING":
1298
for client in self.clients:
1299
if client.name == args:
1300
logger.info(u"Sending secret to %s", client.name)
1307
logger.error(u"Sending secret to unknown client %s",
1310
logger.error(u"Unknown IPC command: %r", cmdline)
1312
# Keep calling this function
411
1316
def string_to_delta(interval):
412
1317
"""Parse a string and return a datetime.timedelta
414
>>> string_to_delta('7d')
1319
>>> string_to_delta(u'7d')
415
1320
datetime.timedelta(7)
416
>>> string_to_delta('60s')
1321
>>> string_to_delta(u'60s')
417
1322
datetime.timedelta(0, 60)
418
>>> string_to_delta('60m')
1323
>>> string_to_delta(u'60m')
419
1324
datetime.timedelta(0, 3600)
420
>>> string_to_delta('24h')
1325
>>> string_to_delta(u'24h')
421
1326
datetime.timedelta(1)
422
1327
>>> string_to_delta(u'1w')
423
1328
datetime.timedelta(7)
1329
>>> string_to_delta(u'5m 30s')
1330
datetime.timedelta(0, 330)
426
suffix=unicode(interval[-1])
427
value=int(interval[:-1])
429
delta = datetime.timedelta(value)
431
delta = datetime.timedelta(0, value)
433
delta = datetime.timedelta(0, 0, 0, 0, value)
435
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
437
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1332
timevalue = datetime.timedelta(0)
1333
for s in interval.split():
1335
suffix = unicode(s[-1])
1338
delta = datetime.timedelta(value)
1339
elif suffix == u"s":
1340
delta = datetime.timedelta(0, value)
1341
elif suffix == u"m":
1342
delta = datetime.timedelta(0, 0, 0, 0, value)
1343
elif suffix == u"h":
1344
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
1345
elif suffix == u"w":
1346
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1349
except (ValueError, IndexError):
439
1350
raise ValueError
440
except (ValueError, IndexError):
446
"""From the Avahi server example code"""
447
global group, serviceName, serviceType, servicePort, serviceTXT, \
450
group = dbus.Interface(
451
bus.get_object( avahi.DBUS_NAME,
452
server.EntryGroupNew()),
453
avahi.DBUS_INTERFACE_ENTRY_GROUP)
454
group.connect_to_signal('StateChanged',
455
entry_group_state_changed)
457
sys.stderr.write(u"Adding service '%s' of type '%s' ...\n"
458
% (serviceName, serviceType))
461
serviceInterface, # interface
462
avahi.PROTO_INET6, # protocol
463
dbus.UInt32(0), # flags
464
serviceName, serviceType,
466
dbus.UInt16(servicePort),
467
avahi.string_array_to_txt_array(serviceTXT))
471
def remove_service():
472
"""From the Avahi server example code"""
475
if not group is None:
479
def server_state_changed(state):
480
"""From the Avahi server example code"""
481
if state == avahi.SERVER_COLLISION:
482
sys.stderr.write(u"WARNING: Server name collision\n")
484
elif state == avahi.SERVER_RUNNING:
488
def entry_group_state_changed(state, error):
489
"""From the Avahi server example code"""
490
global serviceName, server, rename_count
493
sys.stderr.write(u"state change: %i\n" % state)
495
if state == avahi.ENTRY_GROUP_ESTABLISHED:
497
sys.stderr.write(u"Service established.\n")
498
elif state == avahi.ENTRY_GROUP_COLLISION:
500
rename_count = rename_count - 1
502
name = server.GetAlternativeServiceName(name)
503
sys.stderr.write(u"WARNING: Service name collision, "
504
u"changing name to '%s' ...\n" % name)
509
sys.stderr.write(u"ERROR: No suitable service name found "
510
u"after %i retries, exiting.\n"
513
elif state == avahi.ENTRY_GROUP_FAILURE:
514
sys.stderr.write(u"Error in group state changed %s\n"
520
1355
def if_nametoindex(interface):
521
"""Call the C function if_nametoindex()"""
1356
"""Call the C function if_nametoindex(), or equivalent
1358
Note: This function cannot accept a unicode string."""
1359
global if_nametoindex
523
libc = ctypes.cdll.LoadLibrary("libc.so.6")
524
return libc.if_nametoindex(interface)
1361
if_nametoindex = (ctypes.cdll.LoadLibrary
1362
(ctypes.util.find_library(u"c"))
525
1364
except (OSError, AttributeError):
526
if "struct" not in sys.modules:
528
if "fcntl" not in sys.modules:
530
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
532
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
533
struct.pack("16s16x", interface))
535
interface_index = struct.unpack("I", ifreq[16:20])[0]
536
return interface_index
539
if __name__ == '__main__':
540
parser = OptionParser()
541
parser.add_option("-i", "--interface", type="string",
542
default=None, metavar="IF",
543
help="Bind to interface IF")
544
parser.add_option("--cert", type="string", default="cert.pem",
546
help="Public key certificate PEM file to use")
547
parser.add_option("--key", type="string", default="key.pem",
549
help="Private key PEM file to use")
550
parser.add_option("--ca", type="string", default="ca.pem",
552
help="Certificate Authority certificate PEM file to use")
553
parser.add_option("--crl", type="string", default="crl.pem",
555
help="Certificate Revokation List PEM file to use")
556
parser.add_option("-p", "--port", type="int", default=None,
557
help="Port number to receive requests on")
558
parser.add_option("--timeout", type="string", # Parsed later
560
help="Amount of downtime allowed for clients")
561
parser.add_option("--interval", type="string", # Parsed later
563
help="How often to check that a client is up")
564
parser.add_option("--check", action="store_true", default=False,
565
help="Run self-test")
566
parser.add_option("--debug", action="store_true", default=False,
568
(options, args) = parser.parse_args()
1365
logger.warning(u"Doing if_nametoindex the hard way")
1366
def if_nametoindex(interface):
1367
"Get an interface index the hard way, i.e. using fcntl()"
1368
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1369
with closing(socket.socket()) as s:
1370
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1371
struct.pack(str(u"16s16x"),
1373
interface_index = struct.unpack(str(u"I"),
1375
return interface_index
1376
return if_nametoindex(interface)
1379
def daemon(nochdir = False, noclose = False):
1380
"""See daemon(3). Standard BSD Unix function.
1382
This should really exist as os.daemon, but it doesn't (yet)."""
1391
# Close all standard open file descriptors
1392
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1393
if not stat.S_ISCHR(os.fstat(null).st_mode):
1394
raise OSError(errno.ENODEV,
1395
u"%s not a character device"
1397
os.dup2(null, sys.stdin.fileno())
1398
os.dup2(null, sys.stdout.fileno())
1399
os.dup2(null, sys.stderr.fileno())
1406
##################################################################
1407
# Parsing of options, both command line and config file
1409
parser = optparse.OptionParser(version = "%%prog %s" % version)
1410
parser.add_option("-i", u"--interface", type=u"string",
1411
metavar="IF", help=u"Bind to interface IF")
1412
parser.add_option("-a", u"--address", type=u"string",
1413
help=u"Address to listen for requests on")
1414
parser.add_option("-p", u"--port", type=u"int",
1415
help=u"Port number to receive requests on")
1416
parser.add_option("--check", action=u"store_true",
1417
help=u"Run self-test")
1418
parser.add_option("--debug", action=u"store_true",
1419
help=u"Debug mode; run in foreground and log to"
1421
parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1422
u" priority string (see GnuTLS documentation)")
1423
parser.add_option("--servicename", type=u"string",
1424
metavar=u"NAME", help=u"Zeroconf service name")
1425
parser.add_option("--configdir", type=u"string",
1426
default=u"/etc/mandos", metavar=u"DIR",
1427
help=u"Directory to search for configuration"
1429
parser.add_option("--no-dbus", action=u"store_false",
1430
dest=u"use_dbus", help=u"Do not provide D-Bus"
1431
u" system bus interface")
1432
parser.add_option("--no-ipv6", action=u"store_false",
1433
dest=u"use_ipv6", help=u"Do not use IPv6")
1434
options = parser.parse_args()[0]
570
1436
if options.check:
572
1438
doctest.testmod()
575
# Parse the time arguments
577
options.timeout = string_to_delta(options.timeout)
579
parser.error("option --timeout: Unparseable time")
581
options.interval = string_to_delta(options.interval)
583
parser.error("option --interval: Unparseable time")
586
defaults = { "checker": "sleep 1; fping -q -- %%(fqdn)s" }
587
client_config = ConfigParser.SafeConfigParser(defaults)
588
#client_config.readfp(open("secrets.conf"), "secrets.conf")
589
client_config.read("mandos-clients.conf")
591
# From the Avahi server example code
1441
# Default values for config file for server-global settings
1442
server_defaults = { u"interface": u"",
1447
u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1448
u"servicename": u"Mandos",
1449
u"use_dbus": u"True",
1450
u"use_ipv6": u"True",
1453
# Parse config file for server-global settings
1454
server_config = configparser.SafeConfigParser(server_defaults)
1456
server_config.read(os.path.join(options.configdir,
1458
# Convert the SafeConfigParser object to a dict
1459
server_settings = server_config.defaults()
1460
# Use the appropriate methods on the non-string config options
1461
for option in (u"debug", u"use_dbus", u"use_ipv6"):
1462
server_settings[option] = server_config.getboolean(u"DEFAULT",
1464
if server_settings["port"]:
1465
server_settings["port"] = server_config.getint(u"DEFAULT",
1469
# Override the settings from the config file with command line
1471
for option in (u"interface", u"address", u"port", u"debug",
1472
u"priority", u"servicename", u"configdir",
1473
u"use_dbus", u"use_ipv6"):
1474
value = getattr(options, option)
1475
if value is not None:
1476
server_settings[option] = value
1478
# Force all strings to be unicode
1479
for option in server_settings.keys():
1480
if type(server_settings[option]) is str:
1481
server_settings[option] = unicode(server_settings[option])
1482
# Now we have our good server settings in "server_settings"
1484
##################################################################
1487
debug = server_settings[u"debug"]
1488
use_dbus = server_settings[u"use_dbus"]
1489
use_ipv6 = server_settings[u"use_ipv6"]
1492
syslogger.setLevel(logging.WARNING)
1493
console.setLevel(logging.WARNING)
1495
if server_settings[u"servicename"] != u"Mandos":
1496
syslogger.setFormatter(logging.Formatter
1497
(u'Mandos (%s) [%%(process)d]:'
1498
u' %%(levelname)s: %%(message)s'
1499
% server_settings[u"servicename"]))
1501
# Parse config file with clients
1502
client_defaults = { u"timeout": u"1h",
1504
u"checker": u"fping -q -- %%(host)s",
1507
client_config = configparser.SafeConfigParser(client_defaults)
1508
client_config.read(os.path.join(server_settings[u"configdir"],
1511
global mandos_dbus_service
1512
mandos_dbus_service = None
1514
tcp_server = MandosServer((server_settings[u"address"],
1515
server_settings[u"port"]),
1517
interface=server_settings[u"interface"],
1520
server_settings[u"priority"],
1522
pidfilename = u"/var/run/mandos.pid"
1524
pidfile = open(pidfilename, u"w")
1526
logger.error(u"Could not open file %r", pidfilename)
1529
uid = pwd.getpwnam(u"_mandos").pw_uid
1530
gid = pwd.getpwnam(u"_mandos").pw_gid
1533
uid = pwd.getpwnam(u"mandos").pw_uid
1534
gid = pwd.getpwnam(u"mandos").pw_gid
1537
uid = pwd.getpwnam(u"nobody").pw_uid
1538
gid = pwd.getpwnam(u"nobody").pw_gid
1545
except OSError, error:
1546
if error[0] != errno.EPERM:
1549
# Enable all possible GnuTLS debugging
1551
# "Use a log level over 10 to enable all debugging options."
1553
gnutls.library.functions.gnutls_global_set_log_level(11)
1555
@gnutls.library.types.gnutls_log_func
1556
def debug_gnutls(level, string):
1557
logger.debug(u"GnuTLS: %s", string[:-1])
1559
(gnutls.library.functions
1560
.gnutls_global_set_log_function(debug_gnutls))
1563
# From the Avahi example code
592
1564
DBusGMainLoop(set_as_default=True )
593
1565
main_loop = gobject.MainLoop()
594
1566
bus = dbus.SystemBus()
595
server = dbus.Interface(
596
bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
597
avahi.DBUS_INTERFACE_SERVER )
598
1567
# End of Avahi example code
600
debug = options.debug
603
def remove_from_clients(client):
604
clients.remove(client)
607
sys.stderr.write(u"No clients left, exiting\n")
610
clients.update(Set(Client(name=section, options=options,
611
stop_hook = remove_from_clients,
612
**(dict(client_config\
614
for section in client_config.sections()))
615
for client in clients:
618
tcp_server = IPv6_TCPServer((None, options.port),
622
# Find out what random port we got
623
servicePort = tcp_server.socket.getsockname()[1]
1569
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
1570
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1571
service = AvahiService(name = server_settings[u"servicename"],
1572
servicetype = u"_mandos._tcp",
1573
protocol = protocol, bus = bus)
1574
if server_settings["interface"]:
1575
service.interface = (if_nametoindex
1576
(str(server_settings[u"interface"])))
1578
client_class = Client
1580
client_class = functools.partial(ClientDBus, bus = bus)
1581
tcp_server.clients.update(set(
1582
client_class(name = section,
1583
config= dict(client_config.items(section)))
1584
for section in client_config.sections()))
1585
if not tcp_server.clients:
1586
logger.warning(u"No clients defined")
625
sys.stderr.write(u"Now listening on port %d\n" % servicePort)
627
if options.interface is not None:
628
serviceInterface = if_nametoindex(options.interface)
630
# From the Avahi server example code
631
server.connect_to_signal("StateChanged", server_state_changed)
632
server_state_changed(server.GetState())
633
# End of Avahi example code
635
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
636
lambda *args, **kwargs:
637
tcp_server.handle_request(*args[2:],
1589
# Redirect stdin so all checkers get /dev/null
1590
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1591
os.dup2(null, sys.stdin.fileno())
1595
# No console logging
1596
logger.removeHandler(console)
1597
# Close all input and output, do double fork, etc.
1601
with closing(pidfile):
1603
pidfile.write(str(pid) + "\n")
1606
logger.error(u"Could not write to file %r with PID %d",
1609
# "pidfile" was never created
1614
"Cleanup function; run on exit"
1617
while tcp_server.clients:
1618
client = tcp_server.clients.pop()
1619
client.disable_hook = None
1622
atexit.register(cleanup)
1625
signal.signal(signal.SIGINT, signal.SIG_IGN)
1626
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1627
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1630
class MandosDBusService(dbus.service.Object):
1631
"""A D-Bus proxy object"""
1633
dbus.service.Object.__init__(self, bus, u"/")
1634
_interface = u"se.bsnet.fukt.Mandos"
1636
@dbus.service.signal(_interface, signature=u"oa{sv}")
1637
def ClientAdded(self, objpath, properties):
1641
@dbus.service.signal(_interface, signature=u"s")
1642
def ClientNotFound(self, fingerprint):
1646
@dbus.service.signal(_interface, signature=u"os")
1647
def ClientRemoved(self, objpath, name):
1651
@dbus.service.method(_interface, out_signature=u"ao")
1652
def GetAllClients(self):
1654
return dbus.Array(c.dbus_object_path
1655
for c in tcp_server.clients)
1657
@dbus.service.method(_interface,
1658
out_signature=u"a{oa{sv}}")
1659
def GetAllClientsWithProperties(self):
1661
return dbus.Dictionary(
1662
((c.dbus_object_path, c.GetAll(u""))
1663
for c in tcp_server.clients),
1664
signature=u"oa{sv}")
1666
@dbus.service.method(_interface, in_signature=u"o")
1667
def RemoveClient(self, object_path):
1669
for c in tcp_server.clients:
1670
if c.dbus_object_path == object_path:
1671
tcp_server.clients.remove(c)
1672
c.remove_from_connection()
1673
# Don't signal anything except ClientRemoved
1674
c.disable(signal=False)
1676
self.ClientRemoved(object_path, c.name)
1682
mandos_dbus_service = MandosDBusService()
1684
for client in tcp_server.clients:
1687
mandos_dbus_service.ClientAdded(client.dbus_object_path,
1692
tcp_server.server_activate()
1694
# Find out what port we got
1695
service.port = tcp_server.socket.getsockname()[1]
1697
logger.info(u"Now listening on address %r, port %d,"
1698
" flowinfo %d, scope_id %d"
1699
% tcp_server.socket.getsockname())
1701
logger.info(u"Now listening on address %r, port %d"
1702
% tcp_server.socket.getsockname())
1704
#service.interface = tcp_server.socket.getsockname()[3]
1707
# From the Avahi example code
1710
except dbus.exceptions.DBusException, error:
1711
logger.critical(u"DBusException: %s", error)
1713
# End of Avahi example code
1715
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
1716
lambda *args, **kwargs:
1717
(tcp_server.handle_request
1718
(*args[2:], **kwargs) or True))
1720
logger.debug(u"Starting main loop")
1722
except AvahiError, error:
1723
logger.critical(u"AvahiError: %s", error)
641
1725
except KeyboardInterrupt:
1728
logger.debug(u"Server received KeyboardInterrupt")
1729
logger.debug(u"Server exiting")
646
# From the Avahi server example code
647
if not group is None:
649
# End of Avahi example code
651
for client in clients:
652
client.stop_hook = None
1731
if __name__ == '__main__':