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- Committer: teddy at bsnet
- Date: 2010-08-16 19:00:59 UTC
- mto: (237.2.183 mandos-local)
- mto: This revision was merged to the branch mainline in revision 270.
- Revision ID: teddy@fukt.bsnet.se-20100816190059-69vvi27up95cgbbl
* Makefile (run-server, run-client): Add notices about harmless error
messages.
messages.
- files removed:
- DBUS-API
- debian/source
- network-hooks.d
- files modified:
- .bzrignore
added
removed
mandos
11
11
# "AvahiService" class, and some lines in "main".
12
12
#
13
13
# Everything else is
14
# Copyright © 2008-2012 Teddy Hogeborn
15
# Copyright © 2008-2012 Björn Påhlsson
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# Copyright © 2008,2009 Teddy Hogeborn
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# Copyright © 2008,2009 Björn Påhlsson
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16
#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# along with this program. If not, see
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# <http://www.gnu.org/licenses/>.
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#
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# Contact the authors at <mandos@recompile.se>.
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# Contact the authors at <mandos@fukt.bsnet.se>.
32
32
#
33
33
34
from __future__ import (division, absolute_import, print_function,
35
unicode_literals)
34
from __future__ import division, with_statement, absolute_import
36
35
37
36
import SocketServer as socketserver
38
37
import socket
39
import argparse
38
import optparse
40
39
import datetime
41
40
import errno
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41
import gnutls.crypto
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import logging
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import logging.handlers
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import pwd
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import contextlib
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from contextlib import closing
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import struct
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import fcntl
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import functools
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import cPickle as pickle
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import multiprocessing
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import types
66
import binascii
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import tempfile
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import itertools
69
62
70
63
import dbus
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64
import dbus.service
74
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from dbus.mainloop.glib import DBusGMainLoop
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68
import ctypes
76
69
import ctypes.util
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import xml.dom.minidom
78
import inspect
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import GnuPGInterface
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70
81
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try:
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72
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
86
76
except ImportError:
87
77
SO_BINDTODEVICE = None
88
78
89
version = "1.5.3"
90
stored_state_file = "clients.pickle"
91
92
logger = logging.getLogger()
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version = "1.0.14"
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logger = logging.Logger(u'mandos')
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syslogger = (logging.handlers.SysLogHandler
94
84
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
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address = str("/dev/log")))
96
97
try:
98
if_nametoindex = (ctypes.cdll.LoadLibrary
99
(ctypes.util.find_library("c"))
100
.if_nametoindex)
101
except (OSError, AttributeError):
102
def if_nametoindex(interface):
103
"Get an interface index the hard way, i.e. using fcntl()"
104
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
105
with contextlib.closing(socket.socket()) as s:
106
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
107
struct.pack(str("16s16x"),
108
interface))
109
interface_index = struct.unpack(str("I"),
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ifreq[16:20])[0]
111
return interface_index
112
113
114
def initlogger(debug, level=logging.WARNING):
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"""init logger and add loglevel"""
116
117
syslogger.setFormatter(logging.Formatter
118
('Mandos [%(process)d]: %(levelname)s:'
119
' %(message)s'))
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logger.addHandler(syslogger)
121
122
if debug:
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console = logging.StreamHandler()
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console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
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' [%(process)d]:'
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' %(levelname)s:'
127
' %(message)s'))
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logger.addHandler(console)
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logger.setLevel(level)
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131
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class PGPError(Exception):
133
"""Exception if encryption/decryption fails"""
134
pass
135
136
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class PGPEngine(object):
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"""A simple class for OpenPGP symmetric encryption & decryption"""
139
def __init__(self):
140
self.gnupg = GnuPGInterface.GnuPG()
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self.tempdir = tempfile.mkdtemp(prefix="mandos-")
142
self.gnupg = GnuPGInterface.GnuPG()
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self.gnupg.options.meta_interactive = False
144
self.gnupg.options.homedir = self.tempdir
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self.gnupg.options.extra_args.extend(['--force-mdc',
146
'--quiet',
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'--no-use-agent'])
148
149
def __enter__(self):
150
return self
151
152
def __exit__ (self, exc_type, exc_value, traceback):
153
self._cleanup()
154
return False
155
156
def __del__(self):
157
self._cleanup()
158
159
def _cleanup(self):
160
if self.tempdir is not None:
161
# Delete contents of tempdir
162
for root, dirs, files in os.walk(self.tempdir,
163
topdown = False):
164
for filename in files:
165
os.remove(os.path.join(root, filename))
166
for dirname in dirs:
167
os.rmdir(os.path.join(root, dirname))
168
# Remove tempdir
169
os.rmdir(self.tempdir)
170
self.tempdir = None
171
172
def password_encode(self, password):
173
# Passphrase can not be empty and can not contain newlines or
174
# NUL bytes. So we prefix it and hex encode it.
175
return b"mandos" + binascii.hexlify(password)
176
177
def encrypt(self, data, password):
178
self.gnupg.passphrase = self.password_encode(password)
179
with open(os.devnull, "w") as devnull:
180
try:
181
proc = self.gnupg.run(['--symmetric'],
182
create_fhs=['stdin', 'stdout'],
183
attach_fhs={'stderr': devnull})
184
with contextlib.closing(proc.handles['stdin']) as f:
185
f.write(data)
186
with contextlib.closing(proc.handles['stdout']) as f:
187
ciphertext = f.read()
188
proc.wait()
189
except IOError as e:
190
raise PGPError(e)
191
self.gnupg.passphrase = None
192
return ciphertext
193
194
def decrypt(self, data, password):
195
self.gnupg.passphrase = self.password_encode(password)
196
with open(os.devnull, "w") as devnull:
197
try:
198
proc = self.gnupg.run(['--decrypt'],
199
create_fhs=['stdin', 'stdout'],
200
attach_fhs={'stderr': devnull})
201
with contextlib.closing(proc.handles['stdin']) as f:
202
f.write(data)
203
with contextlib.closing(proc.handles['stdout']) as f:
204
decrypted_plaintext = f.read()
205
proc.wait()
206
except IOError as e:
207
raise PGPError(e)
208
self.gnupg.passphrase = None
209
return decrypted_plaintext
210
85
address = "/dev/log"))
86
syslogger.setFormatter(logging.Formatter
87
(u'Mandos [%(process)d]: %(levelname)s:'
88
u' %(message)s'))
89
logger.addHandler(syslogger)
90
91
console = logging.StreamHandler()
92
console.setFormatter(logging.Formatter(u'%(name)s [%(process)d]:'
93
u' %(levelname)s:'
94
u' %(message)s'))
95
logger.addHandler(console)
211
96
212
97
class AvahiError(Exception):
213
98
def __init__(self, value, *args, **kwargs):
229
114
Attributes:
230
115
interface: integer; avahi.IF_UNSPEC or an interface index.
231
116
Used to optionally bind to the specified interface.
232
name: string; Example: 'Mandos'
233
type: string; Example: '_mandos._tcp'.
117
name: string; Example: u'Mandos'
118
type: string; Example: u'_mandos._tcp'.
234
119
See <http://www.dns-sd.org/ServiceTypes.html>
235
120
port: integer; what port to announce
236
121
TXT: list of strings; TXT record for the service
243
128
server: D-Bus Server
244
129
bus: dbus.SystemBus()
245
130
"""
246
247
131
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
248
132
servicetype = None, port = None, TXT = None,
249
domain = "", host = "", max_renames = 32768,
133
domain = u"", host = u"", max_renames = 32768,
250
134
protocol = avahi.PROTO_UNSPEC, bus = None):
251
135
self.interface = interface
252
136
self.name = name
261
145
self.group = None # our entry group
262
146
self.server = None
263
147
self.bus = bus
264
self.entry_group_state_changed_match = None
265
266
148
def rename(self):
267
149
"""Derived from the Avahi example code"""
268
150
if self.rename_count >= self.max_renames:
269
logger.critical("No suitable Zeroconf service name found"
270
" after %i retries, exiting.",
151
logger.critical(u"No suitable Zeroconf service name found"
152
u" after %i retries, exiting.",
271
153
self.rename_count)
272
raise AvahiServiceError("Too many renames")
273
self.name = unicode(self.server
274
.GetAlternativeServiceName(self.name))
275
logger.info("Changing Zeroconf service name to %r ...",
276
self.name)
154
raise AvahiServiceError(u"Too many renames")
155
self.name = self.server.GetAlternativeServiceName(self.name)
156
logger.info(u"Changing Zeroconf service name to %r ...",
157
unicode(self.name))
158
syslogger.setFormatter(logging.Formatter
159
(u'Mandos (%s) [%%(process)d]:'
160
u' %%(levelname)s: %%(message)s'
161
% self.name))
277
162
self.remove()
278
try:
279
self.add()
280
except dbus.exceptions.DBusException as error:
281
logger.critical("D-Bus Exception", exc_info=error)
282
self.cleanup()
283
os._exit(1)
163
self.add()
284
164
self.rename_count += 1
285
286
165
def remove(self):
287
166
"""Derived from the Avahi example code"""
288
if self.entry_group_state_changed_match is not None:
289
self.entry_group_state_changed_match.remove()
290
self.entry_group_state_changed_match = None
291
167
if self.group is not None:
292
168
self.group.Reset()
293
294
169
def add(self):
295
170
"""Derived from the Avahi example code"""
296
self.remove()
297
171
if self.group is None:
298
172
self.group = dbus.Interface(
299
173
self.bus.get_object(avahi.DBUS_NAME,
300
174
self.server.EntryGroupNew()),
301
175
avahi.DBUS_INTERFACE_ENTRY_GROUP)
302
self.entry_group_state_changed_match = (
303
self.group.connect_to_signal(
304
'StateChanged', self.entry_group_state_changed))
305
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
176
self.group.connect_to_signal('StateChanged',
177
self.entry_group_state_changed)
178
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
306
179
self.name, self.type)
307
180
self.group.AddService(
308
181
self.interface,
313
186
dbus.UInt16(self.port),
314
187
avahi.string_array_to_txt_array(self.TXT))
315
188
self.group.Commit()
316
317
189
def entry_group_state_changed(self, state, error):
318
190
"""Derived from the Avahi example code"""
319
logger.debug("Avahi entry group state change: %i", state)
191
logger.debug(u"Avahi state change: %i", state)
320
192
321
193
if state == avahi.ENTRY_GROUP_ESTABLISHED:
322
logger.debug("Zeroconf service established.")
194
logger.debug(u"Zeroconf service established.")
323
195
elif state == avahi.ENTRY_GROUP_COLLISION:
324
logger.info("Zeroconf service name collision.")
196
logger.warning(u"Zeroconf service name collision.")
325
197
self.rename()
326
198
elif state == avahi.ENTRY_GROUP_FAILURE:
327
logger.critical("Avahi: Error in group state changed %s",
199
logger.critical(u"Avahi: Error in group state changed %s",
328
200
unicode(error))
329
raise AvahiGroupError("State changed: {0!s}"
330
.format(error))
331
201
raise AvahiGroupError(u"State changed: %s"
202
% unicode(error))
332
203
def cleanup(self):
333
204
"""Derived from the Avahi example code"""
334
205
if self.group is not None:
335
try:
336
self.group.Free()
337
except (dbus.exceptions.UnknownMethodException,
338
dbus.exceptions.DBusException):
339
pass
206
self.group.Free()
340
207
self.group = None
341
self.remove()
342
343
def server_state_changed(self, state, error=None):
208
def server_state_changed(self, state):
344
209
"""Derived from the Avahi example code"""
345
logger.debug("Avahi server state change: %i", state)
346
bad_states = { avahi.SERVER_INVALID:
347
"Zeroconf server invalid",
348
avahi.SERVER_REGISTERING: None,
349
avahi.SERVER_COLLISION:
350
"Zeroconf server name collision",
351
avahi.SERVER_FAILURE:
352
"Zeroconf server failure" }
353
if state in bad_states:
354
if bad_states[state] is not None:
355
if error is None:
356
logger.error(bad_states[state])
357
else:
358
logger.error(bad_states[state] + ": %r", error)
359
self.cleanup()
210
if state == avahi.SERVER_COLLISION:
211
logger.error(u"Zeroconf server name collision")
212
self.remove()
360
213
elif state == avahi.SERVER_RUNNING:
361
214
self.add()
362
else:
363
if error is None:
364
logger.debug("Unknown state: %r", state)
365
else:
366
logger.debug("Unknown state: %r: %r", state, error)
367
368
215
def activate(self):
369
216
"""Derived from the Avahi example code"""
370
217
if self.server is None:
371
218
self.server = dbus.Interface(
372
219
self.bus.get_object(avahi.DBUS_NAME,
373
avahi.DBUS_PATH_SERVER,
374
follow_name_owner_changes=True),
220
avahi.DBUS_PATH_SERVER),
375
221
avahi.DBUS_INTERFACE_SERVER)
376
self.server.connect_to_signal("StateChanged",
222
self.server.connect_to_signal(u"StateChanged",
377
223
self.server_state_changed)
378
224
self.server_state_changed(self.server.GetState())
379
225
380
class AvahiServiceToSyslog(AvahiService):
381
def rename(self):
382
"""Add the new name to the syslog messages"""
383
ret = AvahiService.rename(self)
384
syslogger.setFormatter(logging.Formatter
385
('Mandos ({0}) [%(process)d]:'
386
' %(levelname)s: %(message)s'
387
.format(self.name)))
388
return ret
389
390
def timedelta_to_milliseconds(td):
391
"Convert a datetime.timedelta() to milliseconds"
392
return ((td.days * 24 * 60 * 60 * 1000)
393
+ (td.seconds * 1000)
394
+ (td.microseconds // 1000))
395
226
396
227
class Client(object):
397
228
"""A representation of a client host served by this server.
398
229
399
230
Attributes:
400
approved: bool(); 'None' if not yet approved/disapproved
401
approval_delay: datetime.timedelta(); Time to wait for approval
402
approval_duration: datetime.timedelta(); Duration of one approval
231
name: string; from the config file, used in log messages and
232
D-Bus identifiers
233
fingerprint: string (40 or 32 hexadecimal digits); used to
234
uniquely identify the client
235
secret: bytestring; sent verbatim (over TLS) to client
236
host: string; available for use by the checker command
237
created: datetime.datetime(); (UTC) object creation
238
last_enabled: datetime.datetime(); (UTC)
239
enabled: bool()
240
last_checked_ok: datetime.datetime(); (UTC) or None
241
timeout: datetime.timedelta(); How long from last_checked_ok
242
until this client is invalid
243
interval: datetime.timedelta(); How often to start a new checker
244
disable_hook: If set, called by disable() as disable_hook(self)
403
245
checker: subprocess.Popen(); a running checker process used
404
246
to see if the client lives.
405
247
'None' if no process is running.
406
checker_callback_tag: a gobject event source tag, or None
407
checker_command: string; External command which is run to check
408
if client lives. %() expansions are done at
248
checker_initiator_tag: a gobject event source tag, or None
249
disable_initiator_tag: - '' -
250
checker_callback_tag: - '' -
251
checker_command: string; External command which is run to check if
252
client lives. %() expansions are done at
409
253
runtime with vars(self) as dict, so that for
410
254
instance %(name)s can be used in the command.
411
checker_initiator_tag: a gobject event source tag, or None
412
created: datetime.datetime(); (UTC) object creation
413
client_structure: Object describing what attributes a client has
414
and is used for storing the client at exit
415
255
current_checker_command: string; current running checker_command
416
disable_initiator_tag: a gobject event source tag, or None
417
enabled: bool()
418
fingerprint: string (40 or 32 hexadecimal digits); used to
419
uniquely identify the client
420
host: string; available for use by the checker command
421
interval: datetime.timedelta(); How often to start a new checker
422
last_approval_request: datetime.datetime(); (UTC) or None
423
last_checked_ok: datetime.datetime(); (UTC) or None
424
last_checker_status: integer between 0 and 255 reflecting exit
425
status of last checker. -1 reflects crashed
426
checker, -2 means no checker completed yet.
427
last_enabled: datetime.datetime(); (UTC) or None
428
name: string; from the config file, used in log messages and
429
D-Bus identifiers
430
secret: bytestring; sent verbatim (over TLS) to client
431
timeout: datetime.timedelta(); How long from last_checked_ok
432
until this client is disabled
433
extended_timeout: extra long timeout when secret has been sent
434
runtime_expansions: Allowed attributes for runtime expansion.
435
expires: datetime.datetime(); time (UTC) when a client will be
436
disabled, or None
437
256
"""
438
257
439
runtime_expansions = ("approval_delay", "approval_duration",
440
"created", "enabled", "fingerprint",
441
"host", "interval", "last_checked_ok",
442
"last_enabled", "name", "timeout")
443
client_defaults = { "timeout": "5m",
444
"extended_timeout": "15m",
445
"interval": "2m",
446
"checker": "fping -q -- %%(host)s",
447
"host": "",
448
"approval_delay": "0s",
449
"approval_duration": "1s",
450
"approved_by_default": "True",
451
"enabled": "True",
452
}
258
@staticmethod
259
def _datetime_to_milliseconds(dt):
260
"Convert a datetime.datetime() to milliseconds"
261
return ((dt.days * 24 * 60 * 60 * 1000)
262
+ (dt.seconds * 1000)
263
+ (dt.microseconds // 1000))
453
264
454
265
def timeout_milliseconds(self):
455
266
"Return the 'timeout' attribute in milliseconds"
456
return timedelta_to_milliseconds(self.timeout)
457
458
def extended_timeout_milliseconds(self):
459
"Return the 'extended_timeout' attribute in milliseconds"
460
return timedelta_to_milliseconds(self.extended_timeout)
267
return self._datetime_to_milliseconds(self.timeout)
461
268
462
269
def interval_milliseconds(self):
463
270
"Return the 'interval' attribute in milliseconds"
464
return timedelta_to_milliseconds(self.interval)
465
466
def approval_delay_milliseconds(self):
467
return timedelta_to_milliseconds(self.approval_delay)
468
469
@staticmethod
470
def config_parser(config):
471
"""Construct a new dict of client settings of this form:
472
{ client_name: {setting_name: value, ...}, ...}
473
with exceptions for any special settings as defined above.
474
NOTE: Must be a pure function. Must return the same result
475
value given the same arguments.
476
"""
477
settings = {}
478
for client_name in config.sections():
479
section = dict(config.items(client_name))
480
client = settings[client_name] = {}
481
482
client["host"] = section["host"]
483
# Reformat values from string types to Python types
484
client["approved_by_default"] = config.getboolean(
485
client_name, "approved_by_default")
486
client["enabled"] = config.getboolean(client_name,
487
"enabled")
488
489
client["fingerprint"] = (section["fingerprint"].upper()
490
.replace(" ", ""))
491
if "secret" in section:
492
client["secret"] = section["secret"].decode("base64")
493
elif "secfile" in section:
494
with open(os.path.expanduser(os.path.expandvars
495
(section["secfile"])),
496
"rb") as secfile:
497
client["secret"] = secfile.read()
498
else:
499
raise TypeError("No secret or secfile for section {0}"
500
.format(section))
501
client["timeout"] = string_to_delta(section["timeout"])
502
client["extended_timeout"] = string_to_delta(
503
section["extended_timeout"])
504
client["interval"] = string_to_delta(section["interval"])
505
client["approval_delay"] = string_to_delta(
506
section["approval_delay"])
507
client["approval_duration"] = string_to_delta(
508
section["approval_duration"])
509
client["checker_command"] = section["checker"]
510
client["last_approval_request"] = None
511
client["last_checked_ok"] = None
512
client["last_checker_status"] = -2
513
514
return settings
515
516
def __init__(self, settings, name = None):
271
return self._datetime_to_milliseconds(self.interval)
272
273
def __init__(self, name = None, disable_hook=None, config=None):
274
"""Note: the 'checker' key in 'config' sets the
275
'checker_command' attribute and *not* the 'checker'
276
attribute."""
517
277
self.name = name
518
# adding all client settings
519
for setting, value in settings.iteritems():
520
setattr(self, setting, value)
521
522
if self.enabled:
523
if not hasattr(self, "last_enabled"):
524
self.last_enabled = datetime.datetime.utcnow()
525
if not hasattr(self, "expires"):
526
self.expires = (datetime.datetime.utcnow()
527
+ self.timeout)
528
else:
529
self.last_enabled = None
530
self.expires = None
531
532
logger.debug("Creating client %r", self.name)
278
if config is None:
279
config = {}
280
logger.debug(u"Creating client %r", self.name)
533
281
# Uppercase and remove spaces from fingerprint for later
534
282
# comparison purposes with return value from the fingerprint()
535
283
# function
536
logger.debug(" Fingerprint: %s", self.fingerprint)
537
self.created = settings.get("created",
538
datetime.datetime.utcnow())
539
540
# attributes specific for this server instance
284
self.fingerprint = (config[u"fingerprint"].upper()
285
.replace(u" ", u""))
286
logger.debug(u" Fingerprint: %s", self.fingerprint)
287
if u"secret" in config:
288
self.secret = config[u"secret"].decode(u"base64")
289
elif u"secfile" in config:
290
with closing(open(os.path.expanduser
291
(os.path.expandvars
292
(config[u"secfile"])))) as secfile:
293
self.secret = secfile.read()
294
else:
295
raise TypeError(u"No secret or secfile for client %s"
296
% self.name)
297
self.host = config.get(u"host", u"")
298
self.created = datetime.datetime.utcnow()
299
self.enabled = False
300
self.last_enabled = None
301
self.last_checked_ok = None
302
self.timeout = string_to_delta(config[u"timeout"])
303
self.interval = string_to_delta(config[u"interval"])
304
self.disable_hook = disable_hook
541
305
self.checker = None
542
306
self.checker_initiator_tag = None
543
307
self.disable_initiator_tag = None
544
308
self.checker_callback_tag = None
309
self.checker_command = config[u"checker"]
545
310
self.current_checker_command = None
546
self.approved = None
547
self.approvals_pending = 0
548
self.changedstate = (multiprocessing_manager
549
.Condition(multiprocessing_manager
550
.Lock()))
551
self.client_structure = [attr for attr in
552
self.__dict__.iterkeys()
553
if not attr.startswith("_")]
554
self.client_structure.append("client_structure")
555
556
for name, t in inspect.getmembers(type(self),
557
lambda obj:
558
isinstance(obj,
559
property)):
560
if not name.startswith("_"):
561
self.client_structure.append(name)
562
563
# Send notice to process children that client state has changed
564
def send_changedstate(self):
565
with self.changedstate:
566
self.changedstate.notify_all()
311
self.last_connect = None
567
312
568
313
def enable(self):
569
314
"""Start this client's checker and timeout hooks"""
570
if getattr(self, "enabled", False):
315
if getattr(self, u"enabled", False):
571
316
# Already enabled
572
317
return
573
self.send_changedstate()
574
self.expires = datetime.datetime.utcnow() + self.timeout
575
self.enabled = True
576
318
self.last_enabled = datetime.datetime.utcnow()
577
self.init_checker()
578
579
def disable(self, quiet=True):
580
"""Disable this client."""
581
if not getattr(self, "enabled", False):
582
return False
583
if not quiet:
584
self.send_changedstate()
585
if not quiet:
586
logger.info("Disabling client %s", self.name)
587
if getattr(self, "disable_initiator_tag", False):
588
gobject.source_remove(self.disable_initiator_tag)
589
self.disable_initiator_tag = None
590
self.expires = None
591
if getattr(self, "checker_initiator_tag", False):
592
gobject.source_remove(self.checker_initiator_tag)
593
self.checker_initiator_tag = None
594
self.stop_checker()
595
self.enabled = False
596
# Do not run this again if called by a gobject.timeout_add
597
return False
598
599
def __del__(self):
600
self.disable()
601
602
def init_checker(self):
603
319
# Schedule a new checker to be started an 'interval' from now,
604
320
# and every interval from then on.
605
321
self.checker_initiator_tag = (gobject.timeout_add
606
322
(self.interval_milliseconds(),
607
323
self.start_checker))
324
# Also start a new checker *right now*.
325
self.start_checker()
608
326
# Schedule a disable() when 'timeout' has passed
609
327
self.disable_initiator_tag = (gobject.timeout_add
610
328
(self.timeout_milliseconds(),
611
329
self.disable))
612
# Also start a new checker *right now*.
613
self.start_checker()
330
self.enabled = True
331
332
def disable(self):
333
"""Disable this client."""
334
if not getattr(self, "enabled", False):
335
return False
336
logger.info(u"Disabling client %s", self.name)
337
if getattr(self, u"disable_initiator_tag", False):
338
gobject.source_remove(self.disable_initiator_tag)
339
self.disable_initiator_tag = None
340
if getattr(self, u"checker_initiator_tag", False):
341
gobject.source_remove(self.checker_initiator_tag)
342
self.checker_initiator_tag = None
343
self.stop_checker()
344
if self.disable_hook:
345
self.disable_hook(self)
346
self.enabled = False
347
# Do not run this again if called by a gobject.timeout_add
348
return False
349
350
def __del__(self):
351
self.disable_hook = None
352
self.disable()
614
353
615
354
def checker_callback(self, pid, condition, command):
616
355
"""The checker has completed, so take appropriate actions."""
617
356
self.checker_callback_tag = None
618
357
self.checker = None
619
358
if os.WIFEXITED(condition):
620
self.last_checker_status = os.WEXITSTATUS(condition)
621
if self.last_checker_status == 0:
622
logger.info("Checker for %(name)s succeeded",
359
exitstatus = os.WEXITSTATUS(condition)
360
if exitstatus == 0:
361
logger.info(u"Checker for %(name)s succeeded",
623
362
vars(self))
624
363
self.checked_ok()
625
364
else:
626
logger.info("Checker for %(name)s failed",
365
logger.info(u"Checker for %(name)s failed",
627
366
vars(self))
628
367
else:
629
self.last_checker_status = -1
630
logger.warning("Checker for %(name)s crashed?",
368
logger.warning(u"Checker for %(name)s crashed?",
631
369
vars(self))
632
370
633
371
def checked_ok(self):
634
"""Assert that the client has been seen, alive and well."""
372
"""Bump up the timeout for this client.
373
374
This should only be called when the client has been seen,
375
alive and well.
376
"""
635
377
self.last_checked_ok = datetime.datetime.utcnow()
636
self.last_checker_status = 0
637
self.bump_timeout()
638
639
def bump_timeout(self, timeout=None):
640
"""Bump up the timeout for this client."""
641
if timeout is None:
642
timeout = self.timeout
643
if self.disable_initiator_tag is not None:
644
gobject.source_remove(self.disable_initiator_tag)
645
if getattr(self, "enabled", False):
646
self.disable_initiator_tag = (gobject.timeout_add
647
(timedelta_to_milliseconds
648
(timeout), self.disable))
649
self.expires = datetime.datetime.utcnow() + timeout
650
651
def need_approval(self):
652
self.last_approval_request = datetime.datetime.utcnow()
378
gobject.source_remove(self.disable_initiator_tag)
379
self.disable_initiator_tag = (gobject.timeout_add
380
(self.timeout_milliseconds(),
381
self.disable))
653
382
654
383
def start_checker(self):
655
384
"""Start a new checker subprocess if one is not running.
662
391
# client would inevitably timeout, since no checker would get
663
392
# a chance to run to completion. If we instead leave running
664
393
# checkers alone, the checker would have to take more time
665
# than 'timeout' for the client to be disabled, which is as it
666
# should be.
394
# than 'timeout' for the client to be declared invalid, which
395
# is as it should be.
667
396
668
397
# If a checker exists, make sure it is not a zombie
669
try:
398
if self.checker is not None:
670
399
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
671
except (AttributeError, OSError) as error:
672
if (isinstance(error, OSError)
673
and error.errno != errno.ECHILD):
674
raise error
675
else:
676
400
if pid:
677
logger.warning("Checker was a zombie")
401
logger.warning(u"Checker was a zombie")
678
402
gobject.source_remove(self.checker_callback_tag)
679
403
self.checker_callback(pid, status,
680
404
self.current_checker_command)
685
409
command = self.checker_command % self.host
686
410
except TypeError:
687
411
# Escape attributes for the shell
688
escaped_attrs = dict(
689
(attr,
690
re.escape(unicode(str(getattr(self, attr, "")),
691
errors=
692
'replace')))
693
for attr in
694
self.runtime_expansions)
695
412
escaped_attrs = dict((key,
413
re.escape(unicode(str(val),
414
errors=
415
u'replace')))
416
for key, val in
417
vars(self).iteritems())
696
418
try:
697
419
command = self.checker_command % escaped_attrs
698
except TypeError as error:
699
logger.error('Could not format string "%s"',
700
self.checker_command, exc_info=error)
420
except TypeError, error:
421
logger.error(u'Could not format string "%s":'
422
u' %s', self.checker_command, error)
701
423
return True # Try again later
702
424
self.current_checker_command = command
703
425
try:
704
logger.info("Starting checker %r for %s",
426
logger.info(u"Starting checker %r for %s",
705
427
command, self.name)
706
428
# We don't need to redirect stdout and stderr, since
707
429
# in normal mode, that is already done by daemon(),
709
431
# always replaced by /dev/null.)
710
432
self.checker = subprocess.Popen(command,
711
433
close_fds=True,
712
shell=True, cwd="/")
434
shell=True, cwd=u"/")
713
435
self.checker_callback_tag = (gobject.child_watch_add
714
436
(self.checker.pid,
715
437
self.checker_callback,
720
442
if pid:
721
443
gobject.source_remove(self.checker_callback_tag)
722
444
self.checker_callback(pid, status, command)
723
except OSError as error:
724
logger.error("Failed to start subprocess",
725
exc_info=error)
445
except OSError, error:
446
logger.error(u"Failed to start subprocess: %s",
447
error)
726
448
# Re-run this periodically if run by gobject.timeout_add
727
449
return True
728
450
731
453
if self.checker_callback_tag:
732
454
gobject.source_remove(self.checker_callback_tag)
733
455
self.checker_callback_tag = None
734
if getattr(self, "checker", None) is None:
456
if getattr(self, u"checker", None) is None:
735
457
return
736
logger.debug("Stopping checker for %(name)s", vars(self))
458
logger.debug(u"Stopping checker for %(name)s", vars(self))
737
459
try:
738
self.checker.terminate()
739
#time.sleep(0.5)
460
os.kill(self.checker.pid, signal.SIGTERM)
461
#os.sleep(0.5)
740
462
#if self.checker.poll() is None:
741
# self.checker.kill()
742
except OSError as error:
463
# os.kill(self.checker.pid, signal.SIGKILL)
464
except OSError, error:
743
465
if error.errno != errno.ESRCH: # No such process
744
466
raise
745
467
self.checker = None
746
747
748
def dbus_service_property(dbus_interface, signature="v",
749
access="readwrite", byte_arrays=False):
750
"""Decorators for marking methods of a DBusObjectWithProperties to
751
become properties on the D-Bus.
752
753
The decorated method will be called with no arguments by "Get"
754
and with one argument by "Set".
755
756
The parameters, where they are supported, are the same as
757
dbus.service.method, except there is only "signature", since the
758
type from Get() and the type sent to Set() is the same.
759
"""
760
# Encoding deeply encoded byte arrays is not supported yet by the
761
# "Set" method, so we fail early here:
762
if byte_arrays and signature != "ay":
763
raise ValueError("Byte arrays not supported for non-'ay'"
764
" signature {0!r}".format(signature))
765
def decorator(func):
766
func._dbus_is_property = True
767
func._dbus_interface = dbus_interface
768
func._dbus_signature = signature
769
func._dbus_access = access
770
func._dbus_name = func.__name__
771
if func._dbus_name.endswith("_dbus_property"):
772
func._dbus_name = func._dbus_name[:-14]
773
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
774
return func
775
return decorator
776
777
778
def dbus_interface_annotations(dbus_interface):
779
"""Decorator for marking functions returning interface annotations
780
781
Usage:
782
783
@dbus_interface_annotations("org.example.Interface")
784
def _foo(self): # Function name does not matter
785
return {"org.freedesktop.DBus.Deprecated": "true",
786
"org.freedesktop.DBus.Property.EmitsChangedSignal":
787
"false"}
788
"""
789
def decorator(func):
790
func._dbus_is_interface = True
791
func._dbus_interface = dbus_interface
792
func._dbus_name = dbus_interface
793
return func
794
return decorator
795
796
797
def dbus_annotations(annotations):
798
"""Decorator to annotate D-Bus methods, signals or properties
799
Usage:
800
801
@dbus_service_property("org.example.Interface", signature="b",
802
access="r")
803
@dbus_annotations({{"org.freedesktop.DBus.Deprecated": "true",
804
"org.freedesktop.DBus.Property."
805
"EmitsChangedSignal": "false"})
806
def Property_dbus_property(self):
807
return dbus.Boolean(False)
808
"""
809
def decorator(func):
810
func._dbus_annotations = annotations
811
return func
812
return decorator
813
814
815
class DBusPropertyException(dbus.exceptions.DBusException):
816
"""A base class for D-Bus property-related exceptions
817
"""
818
def __unicode__(self):
819
return unicode(str(self))
820
821
822
class DBusPropertyAccessException(DBusPropertyException):
823
"""A property's access permissions disallows an operation.
824
"""
825
pass
826
827
828
class DBusPropertyNotFound(DBusPropertyException):
829
"""An attempt was made to access a non-existing property.
830
"""
831
pass
832
833
834
class DBusObjectWithProperties(dbus.service.Object):
835
"""A D-Bus object with properties.
836
837
Classes inheriting from this can use the dbus_service_property
838
decorator to expose methods as D-Bus properties. It exposes the
839
standard Get(), Set(), and GetAll() methods on the D-Bus.
840
"""
841
842
@staticmethod
843
def _is_dbus_thing(thing):
844
"""Returns a function testing if an attribute is a D-Bus thing
845
846
If called like _is_dbus_thing("method") it returns a function
847
suitable for use as predicate to inspect.getmembers().
848
"""
849
return lambda obj: getattr(obj, "_dbus_is_{0}".format(thing),
850
False)
851
852
def _get_all_dbus_things(self, thing):
853
"""Returns a generator of (name, attribute) pairs
854
"""
855
return ((getattr(athing.__get__(self), "_dbus_name",
856
name),
857
athing.__get__(self))
858
for cls in self.__class__.__mro__
859
for name, athing in
860
inspect.getmembers(cls,
861
self._is_dbus_thing(thing)))
862
863
def _get_dbus_property(self, interface_name, property_name):
864
"""Returns a bound method if one exists which is a D-Bus
865
property with the specified name and interface.
866
"""
867
for cls in self.__class__.__mro__:
868
for name, value in (inspect.getmembers
869
(cls,
870
self._is_dbus_thing("property"))):
871
if (value._dbus_name == property_name
872
and value._dbus_interface == interface_name):
873
return value.__get__(self)
874
875
# No such property
876
raise DBusPropertyNotFound(self.dbus_object_path + ":"
877
+ interface_name + "."
878
+ property_name)
879
880
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
881
out_signature="v")
882
def Get(self, interface_name, property_name):
883
"""Standard D-Bus property Get() method, see D-Bus standard.
884
"""
885
prop = self._get_dbus_property(interface_name, property_name)
886
if prop._dbus_access == "write":
887
raise DBusPropertyAccessException(property_name)
888
value = prop()
889
if not hasattr(value, "variant_level"):
890
return value
891
return type(value)(value, variant_level=value.variant_level+1)
892
893
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
894
def Set(self, interface_name, property_name, value):
895
"""Standard D-Bus property Set() method, see D-Bus standard.
896
"""
897
prop = self._get_dbus_property(interface_name, property_name)
898
if prop._dbus_access == "read":
899
raise DBusPropertyAccessException(property_name)
900
if prop._dbus_get_args_options["byte_arrays"]:
901
# The byte_arrays option is not supported yet on
902
# signatures other than "ay".
903
if prop._dbus_signature != "ay":
904
raise ValueError
905
value = dbus.ByteArray(b''.join(chr(byte)
906
for byte in value))
907
prop(value)
908
909
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
910
out_signature="a{sv}")
911
def GetAll(self, interface_name):
912
"""Standard D-Bus property GetAll() method, see D-Bus
913
standard.
914
915
Note: Will not include properties with access="write".
916
"""
917
properties = {}
918
for name, prop in self._get_all_dbus_things("property"):
919
if (interface_name
920
and interface_name != prop._dbus_interface):
921
# Interface non-empty but did not match
922
continue
923
# Ignore write-only properties
924
if prop._dbus_access == "write":
925
continue
926
value = prop()
927
if not hasattr(value, "variant_level"):
928
properties[name] = value
929
continue
930
properties[name] = type(value)(value, variant_level=
931
value.variant_level+1)
932
return dbus.Dictionary(properties, signature="sv")
933
934
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
935
out_signature="s",
936
path_keyword='object_path',
937
connection_keyword='connection')
938
def Introspect(self, object_path, connection):
939
"""Overloading of standard D-Bus method.
940
941
Inserts property tags and interface annotation tags.
942
"""
943
xmlstring = dbus.service.Object.Introspect(self, object_path,
944
connection)
945
try:
946
document = xml.dom.minidom.parseString(xmlstring)
947
def make_tag(document, name, prop):
948
e = document.createElement("property")
949
e.setAttribute("name", name)
950
e.setAttribute("type", prop._dbus_signature)
951
e.setAttribute("access", prop._dbus_access)
952
return e
953
for if_tag in document.getElementsByTagName("interface"):
954
# Add property tags
955
for tag in (make_tag(document, name, prop)
956
for name, prop
957
in self._get_all_dbus_things("property")
958
if prop._dbus_interface
959
== if_tag.getAttribute("name")):
960
if_tag.appendChild(tag)
961
# Add annotation tags
962
for typ in ("method", "signal", "property"):
963
for tag in if_tag.getElementsByTagName(typ):
964
annots = dict()
965
for name, prop in (self.
966
_get_all_dbus_things(typ)):
967
if (name == tag.getAttribute("name")
968
and prop._dbus_interface
969
== if_tag.getAttribute("name")):
970
annots.update(getattr
971
(prop,
972
"_dbus_annotations",
973
{}))
974
for name, value in annots.iteritems():
975
ann_tag = document.createElement(
976
"annotation")
977
ann_tag.setAttribute("name", name)
978
ann_tag.setAttribute("value", value)
979
tag.appendChild(ann_tag)
980
# Add interface annotation tags
981
for annotation, value in dict(
982
itertools.chain(
983
*(annotations().iteritems()
984
for name, annotations in
985
self._get_all_dbus_things("interface")
986
if name == if_tag.getAttribute("name")
987
))).iteritems():
988
ann_tag = document.createElement("annotation")
989
ann_tag.setAttribute("name", annotation)
990
ann_tag.setAttribute("value", value)
991
if_tag.appendChild(ann_tag)
992
# Add the names to the return values for the
993
# "org.freedesktop.DBus.Properties" methods
994
if (if_tag.getAttribute("name")
995
== "org.freedesktop.DBus.Properties"):
996
for cn in if_tag.getElementsByTagName("method"):
997
if cn.getAttribute("name") == "Get":
998
for arg in cn.getElementsByTagName("arg"):
999
if (arg.getAttribute("direction")
1000
== "out"):
1001
arg.setAttribute("name", "value")
1002
elif cn.getAttribute("name") == "GetAll":
1003
for arg in cn.getElementsByTagName("arg"):
1004
if (arg.getAttribute("direction")
1005
== "out"):
1006
arg.setAttribute("name", "props")
1007
xmlstring = document.toxml("utf-8")
1008
document.unlink()
1009
except (AttributeError, xml.dom.DOMException,
1010
xml.parsers.expat.ExpatError) as error:
1011
logger.error("Failed to override Introspection method",
1012
exc_info=error)
1013
return xmlstring
1014
1015
1016
def datetime_to_dbus (dt, variant_level=0):
1017
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1018
if dt is None:
1019
return dbus.String("", variant_level = variant_level)
1020
return dbus.String(dt.isoformat(),
1021
variant_level=variant_level)
1022
1023
1024
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
1025
.__metaclass__):
1026
"""Applied to an empty subclass of a D-Bus object, this metaclass
1027
will add additional D-Bus attributes matching a certain pattern.
1028
"""
1029
def __new__(mcs, name, bases, attr):
1030
# Go through all the base classes which could have D-Bus
1031
# methods, signals, or properties in them
1032
old_interface_names = []
1033
for base in (b for b in bases
1034
if issubclass(b, dbus.service.Object)):
1035
# Go though all attributes of the base class
1036
for attrname, attribute in inspect.getmembers(base):
1037
# Ignore non-D-Bus attributes, and D-Bus attributes
1038
# with the wrong interface name
1039
if (not hasattr(attribute, "_dbus_interface")
1040
or not attribute._dbus_interface
1041
.startswith("se.recompile.Mandos")):
1042
continue
1043
# Create an alternate D-Bus interface name based on
1044
# the current name
1045
alt_interface = (attribute._dbus_interface
1046
.replace("se.recompile.Mandos",
1047
"se.bsnet.fukt.Mandos"))
1048
if alt_interface != attribute._dbus_interface:
1049
old_interface_names.append(alt_interface)
1050
# Is this a D-Bus signal?
1051
if getattr(attribute, "_dbus_is_signal", False):
1052
# Extract the original non-method function by
1053
# black magic
1054
nonmethod_func = (dict(
1055
zip(attribute.func_code.co_freevars,
1056
attribute.__closure__))["func"]
1057
.cell_contents)
1058
# Create a new, but exactly alike, function
1059
# object, and decorate it to be a new D-Bus signal
1060
# with the alternate D-Bus interface name
1061
new_function = (dbus.service.signal
1062
(alt_interface,
1063
attribute._dbus_signature)
1064
(types.FunctionType(
1065
nonmethod_func.func_code,
1066
nonmethod_func.func_globals,
1067
nonmethod_func.func_name,
1068
nonmethod_func.func_defaults,
1069
nonmethod_func.func_closure)))
1070
# Copy annotations, if any
1071
try:
1072
new_function._dbus_annotations = (
1073
dict(attribute._dbus_annotations))
1074
except AttributeError:
1075
pass
1076
# Define a creator of a function to call both the
1077
# old and new functions, so both the old and new
1078
# signals gets sent when the function is called
1079
def fixscope(func1, func2):
1080
"""This function is a scope container to pass
1081
func1 and func2 to the "call_both" function
1082
outside of its arguments"""
1083
def call_both(*args, **kwargs):
1084
"""This function will emit two D-Bus
1085
signals by calling func1 and func2"""
1086
func1(*args, **kwargs)
1087
func2(*args, **kwargs)
1088
return call_both
1089
# Create the "call_both" function and add it to
1090
# the class
1091
attr[attrname] = fixscope(attribute,
1092
new_function)
1093
# Is this a D-Bus method?
1094
elif getattr(attribute, "_dbus_is_method", False):
1095
# Create a new, but exactly alike, function
1096
# object. Decorate it to be a new D-Bus method
1097
# with the alternate D-Bus interface name. Add it
1098
# to the class.
1099
attr[attrname] = (dbus.service.method
1100
(alt_interface,
1101
attribute._dbus_in_signature,
1102
attribute._dbus_out_signature)
1103
(types.FunctionType
1104
(attribute.func_code,
1105
attribute.func_globals,
1106
attribute.func_name,
1107
attribute.func_defaults,
1108
attribute.func_closure)))
1109
# Copy annotations, if any
1110
try:
1111
attr[attrname]._dbus_annotations = (
1112
dict(attribute._dbus_annotations))
1113
except AttributeError:
1114
pass
1115
# Is this a D-Bus property?
1116
elif getattr(attribute, "_dbus_is_property", False):
1117
# Create a new, but exactly alike, function
1118
# object, and decorate it to be a new D-Bus
1119
# property with the alternate D-Bus interface
1120
# name. Add it to the class.
1121
attr[attrname] = (dbus_service_property
1122
(alt_interface,
1123
attribute._dbus_signature,
1124
attribute._dbus_access,
1125
attribute
1126
._dbus_get_args_options
1127
["byte_arrays"])
1128
(types.FunctionType
1129
(attribute.func_code,
1130
attribute.func_globals,
1131
attribute.func_name,
1132
attribute.func_defaults,
1133
attribute.func_closure)))
1134
# Copy annotations, if any
1135
try:
1136
attr[attrname]._dbus_annotations = (
1137
dict(attribute._dbus_annotations))
1138
except AttributeError:
1139
pass
1140
# Is this a D-Bus interface?
1141
elif getattr(attribute, "_dbus_is_interface", False):
1142
# Create a new, but exactly alike, function
1143
# object. Decorate it to be a new D-Bus interface
1144
# with the alternate D-Bus interface name. Add it
1145
# to the class.
1146
attr[attrname] = (dbus_interface_annotations
1147
(alt_interface)
1148
(types.FunctionType
1149
(attribute.func_code,
1150
attribute.func_globals,
1151
attribute.func_name,
1152
attribute.func_defaults,
1153
attribute.func_closure)))
1154
# Deprecate all old interfaces
1155
iname="_AlternateDBusNamesMetaclass_interface_annotation{0}"
1156
for old_interface_name in old_interface_names:
1157
@dbus_interface_annotations(old_interface_name)
1158
def func(self):
1159
return { "org.freedesktop.DBus.Deprecated": "true" }
1160
# Find an unused name
1161
for aname in (iname.format(i) for i in itertools.count()):
1162
if aname not in attr:
1163
attr[aname] = func
1164
break
1165
return type.__new__(mcs, name, bases, attr)
1166
1167
1168
class ClientDBus(Client, DBusObjectWithProperties):
468
469
def still_valid(self):
470
"""Has the timeout not yet passed for this client?"""
471
if not getattr(self, u"enabled", False):
472
return False
473
now = datetime.datetime.utcnow()
474
if self.last_checked_ok is None:
475
return now < (self.created + self.timeout)
476
else:
477
return now < (self.last_checked_ok + self.timeout)
478
479
480
class ClientDBus(Client, dbus.service.Object):
1169
481
"""A Client class using D-Bus
1170
482
1171
483
Attributes:
1172
484
dbus_object_path: dbus.ObjectPath
1173
485
bus: dbus.SystemBus()
1174
486
"""
1175
1176
runtime_expansions = (Client.runtime_expansions
1177
+ ("dbus_object_path",))
1178
1179
487
# dbus.service.Object doesn't use super(), so we can't either.
1180
488
1181
489
def __init__(self, bus = None, *args, **kwargs):
1183
491
Client.__init__(self, *args, **kwargs)
1184
492
# Only now, when this client is initialized, can it show up on
1185
493
# the D-Bus
1186
client_object_name = unicode(self.name).translate(
1187
{ord("."): ord("_"),
1188
ord("-"): ord("_")})
1189
494
self.dbus_object_path = (dbus.ObjectPath
1190
("/clients/" + client_object_name))
1191
DBusObjectWithProperties.__init__(self, self.bus,
1192
self.dbus_object_path)
1193
1194
def notifychangeproperty(transform_func,
1195
dbus_name, type_func=lambda x: x,
1196
variant_level=1):
1197
""" Modify a variable so that it's a property which announces
1198
its changes to DBus.
1199
1200
transform_fun: Function that takes a value and a variant_level
1201
and transforms it to a D-Bus type.
1202
dbus_name: D-Bus name of the variable
1203
type_func: Function that transform the value before sending it
1204
to the D-Bus. Default: no transform
1205
variant_level: D-Bus variant level. Default: 1
1206
"""
1207
attrname = "_{0}".format(dbus_name)
1208
def setter(self, value):
1209
if hasattr(self, "dbus_object_path"):
1210
if (not hasattr(self, attrname) or
1211
type_func(getattr(self, attrname, None))
1212
!= type_func(value)):
1213
dbus_value = transform_func(type_func(value),
1214
variant_level
1215
=variant_level)
1216
self.PropertyChanged(dbus.String(dbus_name),
1217
dbus_value)
1218
setattr(self, attrname, value)
1219
1220
return property(lambda self: getattr(self, attrname), setter)
1221
1222
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1223
approvals_pending = notifychangeproperty(dbus.Boolean,
1224
"ApprovalPending",
1225
type_func = bool)
1226
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1227
last_enabled = notifychangeproperty(datetime_to_dbus,
1228
"LastEnabled")
1229
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1230
type_func = lambda checker:
1231
checker is not None)
1232
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1233
"LastCheckedOK")
1234
last_checker_status = notifychangeproperty(dbus.Int16,
1235
"LastCheckerStatus")
1236
last_approval_request = notifychangeproperty(
1237
datetime_to_dbus, "LastApprovalRequest")
1238
approved_by_default = notifychangeproperty(dbus.Boolean,
1239
"ApprovedByDefault")
1240
approval_delay = notifychangeproperty(dbus.UInt64,
1241
"ApprovalDelay",
1242
type_func =
1243
timedelta_to_milliseconds)
1244
approval_duration = notifychangeproperty(
1245
dbus.UInt64, "ApprovalDuration",
1246
type_func = timedelta_to_milliseconds)
1247
host = notifychangeproperty(dbus.String, "Host")
1248
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1249
type_func =
1250
timedelta_to_milliseconds)
1251
extended_timeout = notifychangeproperty(
1252
dbus.UInt64, "ExtendedTimeout",
1253
type_func = timedelta_to_milliseconds)
1254
interval = notifychangeproperty(dbus.UInt64,
1255
"Interval",
1256
type_func =
1257
timedelta_to_milliseconds)
1258
checker_command = notifychangeproperty(dbus.String, "Checker")
1259
1260
del notifychangeproperty
495
(u"/clients/"
496
+ self.name.replace(u".", u"_")))
497
dbus.service.Object.__init__(self, self.bus,
498
self.dbus_object_path)
499
500
@staticmethod
501
def _datetime_to_dbus(dt, variant_level=0):
502
"""Convert a UTC datetime.datetime() to a D-Bus type."""
503
return dbus.String(dt.isoformat(),
504
variant_level=variant_level)
505
506
def enable(self):
507
oldstate = getattr(self, u"enabled", False)
508
r = Client.enable(self)
509
if oldstate != self.enabled:
510
# Emit D-Bus signals
511
self.PropertyChanged(dbus.String(u"enabled"),
512
dbus.Boolean(True, variant_level=1))
513
self.PropertyChanged(
514
dbus.String(u"last_enabled"),
515
self._datetime_to_dbus(self.last_enabled,
516
variant_level=1))
517
return r
518
519
def disable(self, signal = True):
520
oldstate = getattr(self, u"enabled", False)
521
r = Client.disable(self)
522
if signal and oldstate != self.enabled:
523
# Emit D-Bus signal
524
self.PropertyChanged(dbus.String(u"enabled"),
525
dbus.Boolean(False, variant_level=1))
526
return r
1261
527
1262
528
def __del__(self, *args, **kwargs):
1263
529
try:
1264
530
self.remove_from_connection()
1265
531
except LookupError:
1266
532
pass
1267
if hasattr(DBusObjectWithProperties, "__del__"):
1268
DBusObjectWithProperties.__del__(self, *args, **kwargs)
533
if hasattr(dbus.service.Object, u"__del__"):
534
dbus.service.Object.__del__(self, *args, **kwargs)
1269
535
Client.__del__(self, *args, **kwargs)
1270
536
1271
537
def checker_callback(self, pid, condition, command,
1272
538
*args, **kwargs):
1273
539
self.checker_callback_tag = None
1274
540
self.checker = None
541
# Emit D-Bus signal
542
self.PropertyChanged(dbus.String(u"checker_running"),
543
dbus.Boolean(False, variant_level=1))
1275
544
if os.WIFEXITED(condition):
1276
545
exitstatus = os.WEXITSTATUS(condition)
1277
546
# Emit D-Bus signal
1287
556
return Client.checker_callback(self, pid, condition, command,
1288
557
*args, **kwargs)
1289
558
559
def checked_ok(self, *args, **kwargs):
560
r = Client.checked_ok(self, *args, **kwargs)
561
# Emit D-Bus signal
562
self.PropertyChanged(
563
dbus.String(u"last_checked_ok"),
564
(self._datetime_to_dbus(self.last_checked_ok,
565
variant_level=1)))
566
return r
567
1290
568
def start_checker(self, *args, **kwargs):
1291
569
old_checker = self.checker
1292
570
if self.checker is not None:
1299
577
and old_checker_pid != self.checker.pid):
1300
578
# Emit D-Bus signal
1301
579
self.CheckerStarted(self.current_checker_command)
1302
return r
1303
1304
def _reset_approved(self):
1305
self.approved = None
1306
return False
1307
1308
def approve(self, value=True):
1309
self.send_changedstate()
1310
self.approved = value
1311
gobject.timeout_add(timedelta_to_milliseconds
1312
(self.approval_duration),
1313
self._reset_approved)
1314
1315
## D-Bus methods, signals & properties
1316
_interface = "se.recompile.Mandos.Client"
1317
1318
## Interfaces
1319
1320
@dbus_interface_annotations(_interface)
1321
def _foo(self):
1322
return { "org.freedesktop.DBus.Property.EmitsChangedSignal":
1323
"false"}
1324
1325
## Signals
580
self.PropertyChanged(
581
dbus.String(u"checker_running"),
582
dbus.Boolean(True, variant_level=1))
583
return r
584
585
def stop_checker(self, *args, **kwargs):
586
old_checker = getattr(self, u"checker", None)
587
r = Client.stop_checker(self, *args, **kwargs)
588
if (old_checker is not None
589
and getattr(self, u"checker", None) is None):
590
self.PropertyChanged(dbus.String(u"checker_running"),
591
dbus.Boolean(False, variant_level=1))
592
return r
593
594
## D-Bus methods & signals
595
_interface = u"se.bsnet.fukt.Mandos.Client"
596
597
# CheckedOK - method
598
@dbus.service.method(_interface)
599
def CheckedOK(self):
600
return self.checked_ok()
1326
601
1327
602
# CheckerCompleted - signal
1328
@dbus.service.signal(_interface, signature="nxs")
603
@dbus.service.signal(_interface, signature=u"nxs")
1329
604
def CheckerCompleted(self, exitcode, waitstatus, command):
1330
605
"D-Bus signal"
1331
606
pass
1332
607
1333
608
# CheckerStarted - signal
1334
@dbus.service.signal(_interface, signature="s")
609
@dbus.service.signal(_interface, signature=u"s")
1335
610
def CheckerStarted(self, command):
1336
611
"D-Bus signal"
1337
612
pass
1338
613
614
# GetAllProperties - method
615
@dbus.service.method(_interface, out_signature=u"a{sv}")
616
def GetAllProperties(self):
617
"D-Bus method"
618
return dbus.Dictionary({
619
dbus.String(u"name"):
620
dbus.String(self.name, variant_level=1),
621
dbus.String(u"fingerprint"):
622
dbus.String(self.fingerprint, variant_level=1),
623
dbus.String(u"host"):
624
dbus.String(self.host, variant_level=1),
625
dbus.String(u"created"):
626
self._datetime_to_dbus(self.created,
627
variant_level=1),
628
dbus.String(u"last_enabled"):
629
(self._datetime_to_dbus(self.last_enabled,
630
variant_level=1)
631
if self.last_enabled is not None
632
else dbus.Boolean(False, variant_level=1)),
633
dbus.String(u"enabled"):
634
dbus.Boolean(self.enabled, variant_level=1),
635
dbus.String(u"last_checked_ok"):
636
(self._datetime_to_dbus(self.last_checked_ok,
637
variant_level=1)
638
if self.last_checked_ok is not None
639
else dbus.Boolean (False, variant_level=1)),
640
dbus.String(u"timeout"):
641
dbus.UInt64(self.timeout_milliseconds(),
642
variant_level=1),
643
dbus.String(u"interval"):
644
dbus.UInt64(self.interval_milliseconds(),
645
variant_level=1),
646
dbus.String(u"checker"):
647
dbus.String(self.checker_command,
648
variant_level=1),
649
dbus.String(u"checker_running"):
650
dbus.Boolean(self.checker is not None,
651
variant_level=1),
652
dbus.String(u"object_path"):
653
dbus.ObjectPath(self.dbus_object_path,
654
variant_level=1)
655
}, signature=u"sv")
656
657
# IsStillValid - method
658
@dbus.service.method(_interface, out_signature=u"b")
659
def IsStillValid(self):
660
return self.still_valid()
661
1339
662
# PropertyChanged - signal
1340
@dbus.service.signal(_interface, signature="sv")
663
@dbus.service.signal(_interface, signature=u"sv")
1341
664
def PropertyChanged(self, property, value):
1342
665
"D-Bus signal"
1343
666
pass
1344
667
1345
# GotSecret - signal
668
# ReceivedSecret - signal
1346
669
@dbus.service.signal(_interface)
1347
def GotSecret(self):
1348
"""D-Bus signal
1349
Is sent after a successful transfer of secret from the Mandos
1350
server to mandos-client
1351
"""
670
def ReceivedSecret(self):
671
"D-Bus signal"
1352
672
pass
1353
673
1354
674
# Rejected - signal
1355
@dbus.service.signal(_interface, signature="s")
1356
def Rejected(self, reason):
675
@dbus.service.signal(_interface)
676
def Rejected(self):
1357
677
"D-Bus signal"
1358
678
pass
1359
679
1360
# NeedApproval - signal
1361
@dbus.service.signal(_interface, signature="tb")
1362
def NeedApproval(self, timeout, default):
1363
"D-Bus signal"
1364
return self.need_approval()
1365
1366
## Methods
1367
1368
# Approve - method
1369
@dbus.service.method(_interface, in_signature="b")
1370
def Approve(self, value):
1371
self.approve(value)
1372
1373
# CheckedOK - method
1374
@dbus.service.method(_interface)
1375
def CheckedOK(self):
1376
self.checked_ok()
680
# SetChecker - method
681
@dbus.service.method(_interface, in_signature=u"s")
682
def SetChecker(self, checker):
683
"D-Bus setter method"
684
self.checker_command = checker
685
# Emit D-Bus signal
686
self.PropertyChanged(dbus.String(u"checker"),
687
dbus.String(self.checker_command,
688
variant_level=1))
689
690
# SetHost - method
691
@dbus.service.method(_interface, in_signature=u"s")
692
def SetHost(self, host):
693
"D-Bus setter method"
694
self.host = host
695
# Emit D-Bus signal
696
self.PropertyChanged(dbus.String(u"host"),
697
dbus.String(self.host, variant_level=1))
698
699
# SetInterval - method
700
@dbus.service.method(_interface, in_signature=u"t")
701
def SetInterval(self, milliseconds):
702
self.interval = datetime.timedelta(0, 0, 0, milliseconds)
703
# Emit D-Bus signal
704
self.PropertyChanged(dbus.String(u"interval"),
705
(dbus.UInt64(self.interval_milliseconds(),
706
variant_level=1)))
707
708
# SetSecret - method
709
@dbus.service.method(_interface, in_signature=u"ay",
710
byte_arrays=True)
711
def SetSecret(self, secret):
712
"D-Bus setter method"
713
self.secret = str(secret)
714
715
# SetTimeout - method
716
@dbus.service.method(_interface, in_signature=u"t")
717
def SetTimeout(self, milliseconds):
718
self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
719
# Emit D-Bus signal
720
self.PropertyChanged(dbus.String(u"timeout"),
721
(dbus.UInt64(self.timeout_milliseconds(),
722
variant_level=1)))
1377
723
1378
724
# Enable - method
1379
725
@dbus.service.method(_interface)
1398
744
def StopChecker(self):
1399
745
self.stop_checker()
1400
746
1401
## Properties
1402
1403
# ApprovalPending - property
1404
@dbus_service_property(_interface, signature="b", access="read")
1405
def ApprovalPending_dbus_property(self):
1406
return dbus.Boolean(bool(self.approvals_pending))
1407
1408
# ApprovedByDefault - property
1409
@dbus_service_property(_interface, signature="b",
1410
access="readwrite")
1411
def ApprovedByDefault_dbus_property(self, value=None):
1412
if value is None: # get
1413
return dbus.Boolean(self.approved_by_default)
1414
self.approved_by_default = bool(value)
1415
1416
# ApprovalDelay - property
1417
@dbus_service_property(_interface, signature="t",
1418
access="readwrite")
1419
def ApprovalDelay_dbus_property(self, value=None):
1420
if value is None: # get
1421
return dbus.UInt64(self.approval_delay_milliseconds())
1422
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1423
1424
# ApprovalDuration - property
1425
@dbus_service_property(_interface, signature="t",
1426
access="readwrite")
1427
def ApprovalDuration_dbus_property(self, value=None):
1428
if value is None: # get
1429
return dbus.UInt64(timedelta_to_milliseconds(
1430
self.approval_duration))
1431
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1432
1433
# Name - property
1434
@dbus_service_property(_interface, signature="s", access="read")
1435
def Name_dbus_property(self):
1436
return dbus.String(self.name)
1437
1438
# Fingerprint - property
1439
@dbus_service_property(_interface, signature="s", access="read")
1440
def Fingerprint_dbus_property(self):
1441
return dbus.String(self.fingerprint)
1442
1443
# Host - property
1444
@dbus_service_property(_interface, signature="s",
1445
access="readwrite")
1446
def Host_dbus_property(self, value=None):
1447
if value is None: # get
1448
return dbus.String(self.host)
1449
self.host = unicode(value)
1450
1451
# Created - property
1452
@dbus_service_property(_interface, signature="s", access="read")
1453
def Created_dbus_property(self):
1454
return datetime_to_dbus(self.created)
1455
1456
# LastEnabled - property
1457
@dbus_service_property(_interface, signature="s", access="read")
1458
def LastEnabled_dbus_property(self):
1459
return datetime_to_dbus(self.last_enabled)
1460
1461
# Enabled - property
1462
@dbus_service_property(_interface, signature="b",
1463
access="readwrite")
1464
def Enabled_dbus_property(self, value=None):
1465
if value is None: # get
1466
return dbus.Boolean(self.enabled)
1467
if value:
1468
self.enable()
1469
else:
1470
self.disable()
1471
1472
# LastCheckedOK - property
1473
@dbus_service_property(_interface, signature="s",
1474
access="readwrite")
1475
def LastCheckedOK_dbus_property(self, value=None):
1476
if value is not None:
1477
self.checked_ok()
1478
return
1479
return datetime_to_dbus(self.last_checked_ok)
1480
1481
# LastCheckerStatus - property
1482
@dbus_service_property(_interface, signature="n",
1483
access="read")
1484
def LastCheckerStatus_dbus_property(self):
1485
return dbus.Int16(self.last_checker_status)
1486
1487
# Expires - property
1488
@dbus_service_property(_interface, signature="s", access="read")
1489
def Expires_dbus_property(self):
1490
return datetime_to_dbus(self.expires)
1491
1492
# LastApprovalRequest - property
1493
@dbus_service_property(_interface, signature="s", access="read")
1494
def LastApprovalRequest_dbus_property(self):
1495
return datetime_to_dbus(self.last_approval_request)
1496
1497
# Timeout - property
1498
@dbus_service_property(_interface, signature="t",
1499
access="readwrite")
1500
def Timeout_dbus_property(self, value=None):
1501
if value is None: # get
1502
return dbus.UInt64(self.timeout_milliseconds())
1503
self.timeout = datetime.timedelta(0, 0, 0, value)
1504
# Reschedule timeout
1505
if self.enabled:
1506
now = datetime.datetime.utcnow()
1507
time_to_die = timedelta_to_milliseconds(
1508
(self.last_checked_ok + self.timeout) - now)
1509
if time_to_die <= 0:
1510
# The timeout has passed
1511
self.disable()
1512
else:
1513
self.expires = (now +
1514
datetime.timedelta(milliseconds =
1515
time_to_die))
1516
if (getattr(self, "disable_initiator_tag", None)
1517
is None):
1518
return
1519
gobject.source_remove(self.disable_initiator_tag)
1520
self.disable_initiator_tag = (gobject.timeout_add
1521
(time_to_die,
1522
self.disable))
1523
1524
# ExtendedTimeout - property
1525
@dbus_service_property(_interface, signature="t",
1526
access="readwrite")
1527
def ExtendedTimeout_dbus_property(self, value=None):
1528
if value is None: # get
1529
return dbus.UInt64(self.extended_timeout_milliseconds())
1530
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1531
1532
# Interval - property
1533
@dbus_service_property(_interface, signature="t",
1534
access="readwrite")
1535
def Interval_dbus_property(self, value=None):
1536
if value is None: # get
1537
return dbus.UInt64(self.interval_milliseconds())
1538
self.interval = datetime.timedelta(0, 0, 0, value)
1539
if getattr(self, "checker_initiator_tag", None) is None:
1540
return
1541
if self.enabled:
1542
# Reschedule checker run
1543
gobject.source_remove(self.checker_initiator_tag)
1544
self.checker_initiator_tag = (gobject.timeout_add
1545
(value, self.start_checker))
1546
self.start_checker() # Start one now, too
1547
1548
# Checker - property
1549
@dbus_service_property(_interface, signature="s",
1550
access="readwrite")
1551
def Checker_dbus_property(self, value=None):
1552
if value is None: # get
1553
return dbus.String(self.checker_command)
1554
self.checker_command = unicode(value)
1555
1556
# CheckerRunning - property
1557
@dbus_service_property(_interface, signature="b",
1558
access="readwrite")
1559
def CheckerRunning_dbus_property(self, value=None):
1560
if value is None: # get
1561
return dbus.Boolean(self.checker is not None)
1562
if value:
1563
self.start_checker()
1564
else:
1565
self.stop_checker()
1566
1567
# ObjectPath - property
1568
@dbus_service_property(_interface, signature="o", access="read")
1569
def ObjectPath_dbus_property(self):
1570
return self.dbus_object_path # is already a dbus.ObjectPath
1571
1572
# Secret = property
1573
@dbus_service_property(_interface, signature="ay",
1574
access="write", byte_arrays=True)
1575
def Secret_dbus_property(self, value):
1576
self.secret = str(value)
1577
1578
747
del _interface
1579
748
1580
749
1581
class ProxyClient(object):
1582
def __init__(self, child_pipe, fpr, address):
1583
self._pipe = child_pipe
1584
self._pipe.send(('init', fpr, address))
1585
if not self._pipe.recv():
1586
raise KeyError()
1587
1588
def __getattribute__(self, name):
1589
if name == '_pipe':
1590
return super(ProxyClient, self).__getattribute__(name)
1591
self._pipe.send(('getattr', name))
1592
data = self._pipe.recv()
1593
if data[0] == 'data':
1594
return data[1]
1595
if data[0] == 'function':
1596
def func(*args, **kwargs):
1597
self._pipe.send(('funcall', name, args, kwargs))
1598
return self._pipe.recv()[1]
1599
return func
1600
1601
def __setattr__(self, name, value):
1602
if name == '_pipe':
1603
return super(ProxyClient, self).__setattr__(name, value)
1604
self._pipe.send(('setattr', name, value))
1605
1606
1607
class ClientDBusTransitional(ClientDBus):
1608
__metaclass__ = AlternateDBusNamesMetaclass
1609
1610
1611
750
class ClientHandler(socketserver.BaseRequestHandler, object):
1612
751
"""A class to handle client connections.
1613
752
1615
754
Note: This will run in its own forked process."""
1616
755
1617
756
def handle(self):
1618
with contextlib.closing(self.server.child_pipe) as child_pipe:
1619
logger.info("TCP connection from: %s",
1620
unicode(self.client_address))
1621
logger.debug("Pipe FD: %d",
1622
self.server.child_pipe.fileno())
1623
757
logger.info(u"TCP connection from: %s",
758
unicode(self.client_address))
759
logger.debug(u"IPC Pipe FD: %d", self.server.pipe[1])
760
# Open IPC pipe to parent process
761
with closing(os.fdopen(self.server.pipe[1], u"w", 1)) as ipc:
1624
762
session = (gnutls.connection
1625
763
.ClientSession(self.request,
1626
764
gnutls.connection
1627
765
.X509Credentials()))
1628
766
767
line = self.request.makefile().readline()
768
logger.debug(u"Protocol version: %r", line)
769
try:
770
if int(line.strip().split()[0]) > 1:
771
raise RuntimeError
772
except (ValueError, IndexError, RuntimeError), error:
773
logger.error(u"Unknown protocol version: %s", error)
774
return
775
1629
776
# Note: gnutls.connection.X509Credentials is really a
1630
777
# generic GnuTLS certificate credentials object so long as
1631
778
# no X.509 keys are added to it. Therefore, we can use it
1632
779
# here despite using OpenPGP certificates.
1633
780
1634
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1635
# "+AES-256-CBC", "+SHA1",
1636
# "+COMP-NULL", "+CTYPE-OPENPGP",
1637
# "+DHE-DSS"))
781
#priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
782
# u"+AES-256-CBC", u"+SHA1",
783
# u"+COMP-NULL", u"+CTYPE-OPENPGP",
784
# u"+DHE-DSS"))
1638
785
# Use a fallback default, since this MUST be set.
1639
786
priority = self.server.gnutls_priority
1640
787
if priority is None:
1641
priority = "NORMAL"
788
priority = u"NORMAL"
1642
789
(gnutls.library.functions
1643
790
.gnutls_priority_set_direct(session._c_object,
1644
791
priority, None))
1645
792
1646
# Start communication using the Mandos protocol
1647
# Get protocol number
1648
line = self.request.makefile().readline()
1649
logger.debug("Protocol version: %r", line)
1650
try:
1651
if int(line.strip().split()[0]) > 1:
1652
raise RuntimeError
1653
except (ValueError, IndexError, RuntimeError) as error:
1654
logger.error("Unknown protocol version: %s", error)
1655
return
1656
1657
# Start GnuTLS connection
1658
793
try:
1659
794
session.handshake()
1660
except gnutls.errors.GNUTLSError as error:
1661
logger.warning("Handshake failed: %s", error)
795
except gnutls.errors.GNUTLSError, error:
796
logger.warning(u"Handshake failed: %s", error)
1662
797
# Do not run session.bye() here: the session is not
1663
798
# established. Just abandon the request.
1664
799
return
1665
logger.debug("Handshake succeeded")
1666
1667
approval_required = False
800
logger.debug(u"Handshake succeeded")
1668
801
try:
1669
try:
1670
fpr = self.fingerprint(self.peer_certificate
1671
(session))
1672
except (TypeError,
1673
gnutls.errors.GNUTLSError) as error:
1674
logger.warning("Bad certificate: %s", error)
1675
return
1676
logger.debug("Fingerprint: %s", fpr)
1677
1678
try:
1679
client = ProxyClient(child_pipe, fpr,
1680
self.client_address)
1681
except KeyError:
1682
return
1683
1684
if client.approval_delay:
1685
delay = client.approval_delay
1686
client.approvals_pending += 1
1687
approval_required = True
1688
1689
while True:
1690
if not client.enabled:
1691
logger.info("Client %s is disabled",
1692
client.name)
1693
if self.server.use_dbus:
1694
# Emit D-Bus signal
1695
client.Rejected("Disabled")
1696
return
1697
1698
if client.approved or not client.approval_delay:
1699
#We are approved or approval is disabled
1700
break
1701
elif client.approved is None:
1702
logger.info("Client %s needs approval",
1703
client.name)
1704
if self.server.use_dbus:
1705
# Emit D-Bus signal
1706
client.NeedApproval(
1707
client.approval_delay_milliseconds(),
1708
client.approved_by_default)
1709
else:
1710
logger.warning("Client %s was not approved",
1711
client.name)
1712
if self.server.use_dbus:
1713
# Emit D-Bus signal
1714
client.Rejected("Denied")
1715
return
1716
1717
#wait until timeout or approved
1718
time = datetime.datetime.now()
1719
client.changedstate.acquire()
1720
(client.changedstate.wait
1721
(float(client.timedelta_to_milliseconds(delay)
1722
/ 1000)))
1723
client.changedstate.release()
1724
time2 = datetime.datetime.now()
1725
if (time2 - time) >= delay:
1726
if not client.approved_by_default:
1727
logger.warning("Client %s timed out while"
1728
" waiting for approval",
1729
client.name)
1730
if self.server.use_dbus:
1731
# Emit D-Bus signal
1732
client.Rejected("Approval timed out")
1733
return
1734
else:
1735
break
1736
else:
1737
delay -= time2 - time
1738
1739
sent_size = 0
1740
while sent_size < len(client.secret):
1741
try:
1742
sent = session.send(client.secret[sent_size:])
1743
except gnutls.errors.GNUTLSError as error:
1744
logger.warning("gnutls send failed",
1745
exc_info=error)
1746
return
1747
logger.debug("Sent: %d, remaining: %d",
1748
sent, len(client.secret)
1749
- (sent_size + sent))
1750
sent_size += sent
1751
1752
logger.info("Sending secret to %s", client.name)
1753
# bump the timeout using extended_timeout
1754
client.bump_timeout(client.extended_timeout)
1755
if self.server.use_dbus:
1756
# Emit D-Bus signal
1757
client.GotSecret()
802
fpr = self.fingerprint(self.peer_certificate(session))
803
except (TypeError, gnutls.errors.GNUTLSError), error:
804
logger.warning(u"Bad certificate: %s", error)
805
session.bye()
806
return
807
logger.debug(u"Fingerprint: %s", fpr)
1758
808
1759
finally:
1760
if approval_required:
1761
client.approvals_pending -= 1
1762
try:
1763
session.bye()
1764
except gnutls.errors.GNUTLSError as error:
1765
logger.warning("GnuTLS bye failed",
1766
exc_info=error)
809
for c in self.server.clients:
810
if c.fingerprint == fpr:
811
client = c
812
break
813
else:
814
ipc.write(u"NOTFOUND %s %s\n"
815
% (fpr, unicode(self.client_address)))
816
session.bye()
817
return
818
# Have to check if client.still_valid(), since it is
819
# possible that the client timed out while establishing
820
# the GnuTLS session.
821
if not client.still_valid():
822
ipc.write(u"INVALID %s\n" % client.name)
823
session.bye()
824
return
825
ipc.write(u"SENDING %s\n" % client.name)
826
sent_size = 0
827
while sent_size < len(client.secret):
828
sent = session.send(client.secret[sent_size:])
829
logger.debug(u"Sent: %d, remaining: %d",
830
sent, len(client.secret)
831
- (sent_size + sent))
832
sent_size += sent
833
session.bye()
1767
834
1768
835
@staticmethod
1769
836
def peer_certificate(session):
1779
846
.gnutls_certificate_get_peers
1780
847
(session._c_object, ctypes.byref(list_size)))
1781
848
if not bool(cert_list) and list_size.value != 0:
1782
raise gnutls.errors.GNUTLSError("error getting peer"
1783
" certificate")
849
raise gnutls.errors.GNUTLSError(u"error getting peer"
850
u" certificate")
1784
851
if list_size.value == 0:
1785
852
return None
1786
853
cert = cert_list[0]
1812
879
if crtverify.value != 0:
1813
880
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1814
881
raise (gnutls.errors.CertificateSecurityError
1815
("Verify failed"))
882
(u"Verify failed"))
1816
883
# New buffer for the fingerprint
1817
884
buf = ctypes.create_string_buffer(20)
1818
885
buf_len = ctypes.c_size_t()
1825
892
# Convert the buffer to a Python bytestring
1826
893
fpr = ctypes.string_at(buf, buf_len.value)
1827
894
# Convert the bytestring to hexadecimal notation
1828
hex_fpr = binascii.hexlify(fpr).upper()
895
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
1829
896
return hex_fpr
1830
897
1831
898
1832
class MultiprocessingMixIn(object):
1833
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1834
def sub_process_main(self, request, address):
1835
try:
1836
self.finish_request(request, address)
1837
except Exception:
1838
self.handle_error(request, address)
1839
self.close_request(request)
1840
1841
def process_request(self, request, address):
1842
"""Start a new process to process the request."""
1843
proc = multiprocessing.Process(target = self.sub_process_main,
1844
args = (request,
1845
address))
1846
proc.start()
1847
return proc
1848
1849
1850
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1851
""" adds a pipe to the MixIn """
899
class ForkingMixInWithPipe(socketserver.ForkingMixIn, object):
900
"""Like socketserver.ForkingMixIn, but also pass a pipe."""
1852
901
def process_request(self, request, client_address):
1853
902
"""Overrides and wraps the original process_request().
1854
903
1855
904
This function creates a new pipe in self.pipe
1856
905
"""
1857
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1858
1859
proc = MultiprocessingMixIn.process_request(self, request,
1860
client_address)
1861
self.child_pipe.close()
1862
self.add_pipe(parent_pipe, proc)
1863
1864
def add_pipe(self, parent_pipe, proc):
906
self.pipe = os.pipe()
907
super(ForkingMixInWithPipe,
908
self).process_request(request, client_address)
909
os.close(self.pipe[1]) # close write end
910
self.add_pipe(self.pipe[0])
911
def add_pipe(self, pipe):
1865
912
"""Dummy function; override as necessary"""
1866
raise NotImplementedError
1867
1868
1869
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
913
os.close(pipe)
914
915
916
class IPv6_TCPServer(ForkingMixInWithPipe,
1870
917
socketserver.TCPServer, object):
1871
918
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1872
919
1888
935
bind to an address or port if they were not specified."""
1889
936
if self.interface is not None:
1890
937
if SO_BINDTODEVICE is None:
1891
logger.error("SO_BINDTODEVICE does not exist;"
1892
" cannot bind to interface %s",
938
logger.error(u"SO_BINDTODEVICE does not exist;"
939
u" cannot bind to interface %s",
1893
940
self.interface)
1894
941
else:
1895
942
try:
1896
943
self.socket.setsockopt(socket.SOL_SOCKET,
1897
944
SO_BINDTODEVICE,
1898
945
str(self.interface
1899
+ '\0'))
1900
except socket.error as error:
946
+ u'\0'))
947
except socket.error, error:
1901
948
if error[0] == errno.EPERM:
1902
logger.error("No permission to"
1903
" bind to interface %s",
949
logger.error(u"No permission to"
950
u" bind to interface %s",
1904
951
self.interface)
1905
952
elif error[0] == errno.ENOPROTOOPT:
1906
logger.error("SO_BINDTODEVICE not available;"
1907
" cannot bind to interface %s",
953
logger.error(u"SO_BINDTODEVICE not available;"
954
u" cannot bind to interface %s",
1908
955
self.interface)
1909
956
else:
1910
957
raise
1912
959
if self.server_address[0] or self.server_address[1]:
1913
960
if not self.server_address[0]:
1914
961
if self.address_family == socket.AF_INET6:
1915
any_address = "::" # in6addr_any
962
any_address = u"::" # in6addr_any
1916
963
else:
1917
964
any_address = socket.INADDR_ANY
1918
965
self.server_address = (any_address,
1936
983
clients: set of Client objects
1937
984
gnutls_priority GnuTLS priority string
1938
985
use_dbus: Boolean; to emit D-Bus signals or not
986
clients: set of Client objects
987
gnutls_priority GnuTLS priority string
988
use_dbus: Boolean; to emit D-Bus signals or not
1939
989
1940
990
Assumes a gobject.MainLoop event loop.
1941
991
"""
1945
995
self.enabled = False
1946
996
self.clients = clients
1947
997
if self.clients is None:
1948
self.clients = {}
998
self.clients = set()
1949
999
self.use_dbus = use_dbus
1950
1000
self.gnutls_priority = gnutls_priority
1951
1001
IPv6_TCPServer.__init__(self, server_address,
1955
1005
def server_activate(self):
1956
1006
if self.enabled:
1957
1007
return socketserver.TCPServer.server_activate(self)
1958
1959
1008
def enable(self):
1960
1009
self.enabled = True
1961
1962
def add_pipe(self, parent_pipe, proc):
1010
def add_pipe(self, pipe):
1963
1011
# Call "handle_ipc" for both data and EOF events
1964
gobject.io_add_watch(parent_pipe.fileno(),
1965
gobject.IO_IN | gobject.IO_HUP,
1966
functools.partial(self.handle_ipc,
1967
parent_pipe =
1968
parent_pipe,
1969
proc = proc))
1970
1971
def handle_ipc(self, source, condition, parent_pipe=None,
1972
proc = None, client_object=None):
1012
gobject.io_add_watch(pipe, gobject.IO_IN | gobject.IO_HUP,
1013
self.handle_ipc)
1014
def handle_ipc(self, source, condition, file_objects={}):
1973
1015
condition_names = {
1974
gobject.IO_IN: "IN", # There is data to read.
1975
gobject.IO_OUT: "OUT", # Data can be written (without
1016
gobject.IO_IN: u"IN", # There is data to read.
1017
gobject.IO_OUT: u"OUT", # Data can be written (without
1976
1018
# blocking).
1977
gobject.IO_PRI: "PRI", # There is urgent data to read.
1978
gobject.IO_ERR: "ERR", # Error condition.
1979
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1019
gobject.IO_PRI: u"PRI", # There is urgent data to read.
1020
gobject.IO_ERR: u"ERR", # Error condition.
1021
gobject.IO_HUP: u"HUP" # Hung up (the connection has been
1980
1022
# broken, usually for pipes and
1981
1023
# sockets).
1982
1024
}
1984
1026
for cond, name in
1985
1027
condition_names.iteritems()
1986
1028
if cond & condition)
1987
# error, or the other end of multiprocessing.Pipe has closed
1988
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
1989
# Wait for other process to exit
1990
proc.join()
1991
return False
1992
1993
# Read a request from the child
1994
request = parent_pipe.recv()
1995
command = request[0]
1996
1997
if command == 'init':
1998
fpr = request[1]
1999
address = request[2]
2000
2001
for c in self.clients.itervalues():
2002
if c.fingerprint == fpr:
2003
client = c
2004
break
2005
else:
2006
logger.info("Client not found for fingerprint: %s, ad"
2007
"dress: %s", fpr, address)
2008
if self.use_dbus:
2009
# Emit D-Bus signal
2010
mandos_dbus_service.ClientNotFound(fpr,
2011
address[0])
2012
parent_pipe.send(False)
2013
return False
2014
2015
gobject.io_add_watch(parent_pipe.fileno(),
2016
gobject.IO_IN | gobject.IO_HUP,
2017
functools.partial(self.handle_ipc,
2018
parent_pipe =
2019
parent_pipe,
2020
proc = proc,
2021
client_object =
2022
client))
2023
parent_pipe.send(True)
2024
# remove the old hook in favor of the new above hook on
2025
# same fileno
2026
return False
2027
if command == 'funcall':
2028
funcname = request[1]
2029
args = request[2]
2030
kwargs = request[3]
2031
2032
parent_pipe.send(('data', getattr(client_object,
2033
funcname)(*args,
2034
**kwargs)))
2035
2036
if command == 'getattr':
2037
attrname = request[1]
2038
if callable(client_object.__getattribute__(attrname)):
2039
parent_pipe.send(('function',))
2040
else:
2041
parent_pipe.send(('data', client_object
2042
.__getattribute__(attrname)))
2043
2044
if command == 'setattr':
2045
attrname = request[1]
2046
value = request[2]
2047
setattr(client_object, attrname, value)
2048
1029
logger.debug(u"Handling IPC: FD = %d, condition = %s", source,
1030
conditions_string)
1031
1032
# Turn the pipe file descriptor into a Python file object
1033
if source not in file_objects:
1034
file_objects[source] = os.fdopen(source, u"r", 1)
1035
1036
# Read a line from the file object
1037
cmdline = file_objects[source].readline()
1038
if not cmdline: # Empty line means end of file
1039
# close the IPC pipe
1040
file_objects[source].close()
1041
del file_objects[source]
1042
1043
# Stop calling this function
1044
return False
1045
1046
logger.debug(u"IPC command: %r", cmdline)
1047
1048
# Parse and act on command
1049
cmd, args = cmdline.rstrip(u"\r\n").split(None, 1)
1050
1051
if cmd == u"NOTFOUND":
1052
logger.warning(u"Client not found for fingerprint: %s",
1053
args)
1054
if self.use_dbus:
1055
# Emit D-Bus signal
1056
mandos_dbus_service.ClientNotFound(args)
1057
elif cmd == u"INVALID":
1058
for client in self.clients:
1059
if client.name == args:
1060
logger.warning(u"Client %s is invalid", args)
1061
if self.use_dbus:
1062
# Emit D-Bus signal
1063
client.Rejected()
1064
break
1065
else:
1066
logger.error(u"Unknown client %s is invalid", args)
1067
elif cmd == u"SENDING":
1068
for client in self.clients:
1069
if client.name == args:
1070
logger.info(u"Sending secret to %s", client.name)
1071
client.checked_ok()
1072
if self.use_dbus:
1073
# Emit D-Bus signal
1074
client.ReceivedSecret()
1075
break
1076
else:
1077
logger.error(u"Sending secret to unknown client %s",
1078
args)
1079
else:
1080
logger.error(u"Unknown IPC command: %r", cmdline)
1081
1082
# Keep calling this function
2049
1083
return True
2050
1084
2051
1085
2052
1086
def string_to_delta(interval):
2053
1087
"""Parse a string and return a datetime.timedelta
2054
1088
2055
>>> string_to_delta('7d')
1089
>>> string_to_delta(u'7d')
2056
1090
datetime.timedelta(7)
2057
>>> string_to_delta('60s')
1091
>>> string_to_delta(u'60s')
2058
1092
datetime.timedelta(0, 60)
2059
>>> string_to_delta('60m')
1093
>>> string_to_delta(u'60m')
2060
1094
datetime.timedelta(0, 3600)
2061
>>> string_to_delta('24h')
1095
>>> string_to_delta(u'24h')
2062
1096
datetime.timedelta(1)
2063
>>> string_to_delta('1w')
1097
>>> string_to_delta(u'1w')
2064
1098
datetime.timedelta(7)
2065
>>> string_to_delta('5m 30s')
1099
>>> string_to_delta(u'5m 30s')
2066
1100
datetime.timedelta(0, 330)
2067
1101
"""
2068
1102
timevalue = datetime.timedelta(0)
2070
1104
try:
2071
1105
suffix = unicode(s[-1])
2072
1106
value = int(s[:-1])
2073
if suffix == "d":
1107
if suffix == u"d":
2074
1108
delta = datetime.timedelta(value)
2075
elif suffix == "s":
1109
elif suffix == u"s":
2076
1110
delta = datetime.timedelta(0, value)
2077
elif suffix == "m":
1111
elif suffix == u"m":
2078
1112
delta = datetime.timedelta(0, 0, 0, 0, value)
2079
elif suffix == "h":
1113
elif suffix == u"h":
2080
1114
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
2081
elif suffix == "w":
1115
elif suffix == u"w":
2082
1116
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
2083
1117
else:
2084
raise ValueError("Unknown suffix {0!r}"
2085
.format(suffix))
2086
except (ValueError, IndexError) as e:
2087
raise ValueError(*(e.args))
1118
raise ValueError
1119
except (ValueError, IndexError):
1120
raise ValueError
2088
1121
timevalue += delta
2089
1122
return timevalue
2090
1123
2091
1124
1125
def if_nametoindex(interface):
1126
"""Call the C function if_nametoindex(), or equivalent
1127
1128
Note: This function cannot accept a unicode string."""
1129
global if_nametoindex
1130
try:
1131
if_nametoindex = (ctypes.cdll.LoadLibrary
1132
(ctypes.util.find_library(u"c"))
1133
.if_nametoindex)
1134
except (OSError, AttributeError):
1135
logger.warning(u"Doing if_nametoindex the hard way")
1136
def if_nametoindex(interface):
1137
"Get an interface index the hard way, i.e. using fcntl()"
1138
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1139
with closing(socket.socket()) as s:
1140
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1141
struct.pack(str(u"16s16x"),
1142
interface))
1143
interface_index = struct.unpack(str(u"I"),
1144
ifreq[16:20])[0]
1145
return interface_index
1146
return if_nametoindex(interface)
1147
1148
2092
1149
def daemon(nochdir = False, noclose = False):
2093
1150
"""See daemon(3). Standard BSD Unix function.
2094
1151
2097
1154
sys.exit()
2098
1155
os.setsid()
2099
1156
if not nochdir:
2100
os.chdir("/")
1157
os.chdir(u"/")
2101
1158
if os.fork():
2102
1159
sys.exit()
2103
1160
if not noclose:
2104
1161
# Close all standard open file descriptors
2105
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1162
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2106
1163
if not stat.S_ISCHR(os.fstat(null).st_mode):
2107
1164
raise OSError(errno.ENODEV,
2108
"{0} not a character device"
2109
.format(os.devnull))
1165
u"/dev/null not a character device")
2110
1166
os.dup2(null, sys.stdin.fileno())
2111
1167
os.dup2(null, sys.stdout.fileno())
2112
1168
os.dup2(null, sys.stderr.fileno())
2116
1172
2117
1173
def main():
2118
1174
2119
##################################################################
1175
######################################################################
2120
1176
# Parsing of options, both command line and config file
2121
1177
2122
parser = argparse.ArgumentParser()
2123
parser.add_argument("-v", "--version", action="version",
2124
version = "%(prog)s {0}".format(version),
2125
help="show version number and exit")
2126
parser.add_argument("-i", "--interface", metavar="IF",
2127
help="Bind to interface IF")
2128
parser.add_argument("-a", "--address",
2129
help="Address to listen for requests on")
2130
parser.add_argument("-p", "--port", type=int,
2131
help="Port number to receive requests on")
2132
parser.add_argument("--check", action="store_true",
2133
help="Run self-test")
2134
parser.add_argument("--debug", action="store_true",
2135
help="Debug mode; run in foreground and log"
2136
" to terminal")
2137
parser.add_argument("--debuglevel", metavar="LEVEL",
2138
help="Debug level for stdout output")
2139
parser.add_argument("--priority", help="GnuTLS"
2140
" priority string (see GnuTLS documentation)")
2141
parser.add_argument("--servicename",
2142
metavar="NAME", help="Zeroconf service name")
2143
parser.add_argument("--configdir",
2144
default="/etc/mandos", metavar="DIR",
2145
help="Directory to search for configuration"
2146
" files")
2147
parser.add_argument("--no-dbus", action="store_false",
2148
dest="use_dbus", help="Do not provide D-Bus"
2149
" system bus interface")
2150
parser.add_argument("--no-ipv6", action="store_false",
2151
dest="use_ipv6", help="Do not use IPv6")
2152
parser.add_argument("--no-restore", action="store_false",
2153
dest="restore", help="Do not restore stored"
2154
" state")
2155
parser.add_argument("--statedir", metavar="DIR",
2156
help="Directory to save/restore state in")
2157
2158
options = parser.parse_args()
1178
parser = optparse.OptionParser(version = "%%prog %s" % version)
1179
parser.add_option("-i", u"--interface", type=u"string",
1180
metavar="IF", help=u"Bind to interface IF")
1181
parser.add_option("-a", u"--address", type=u"string",
1182
help=u"Address to listen for requests on")
1183
parser.add_option("-p", u"--port", type=u"int",
1184
help=u"Port number to receive requests on")
1185
parser.add_option("--check", action=u"store_true",
1186
help=u"Run self-test")
1187
parser.add_option("--debug", action=u"store_true",
1188
help=u"Debug mode; run in foreground and log to"
1189
u" terminal")
1190
parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1191
u" priority string (see GnuTLS documentation)")
1192
parser.add_option("--servicename", type=u"string",
1193
metavar=u"NAME", help=u"Zeroconf service name")
1194
parser.add_option("--configdir", type=u"string",
1195
default=u"/etc/mandos", metavar=u"DIR",
1196
help=u"Directory to search for configuration"
1197
u" files")
1198
parser.add_option("--no-dbus", action=u"store_false",
1199
dest=u"use_dbus",
1200
help=optparse.SUPPRESS_HELP) # XXX: Not done yet
1201
parser.add_option("--no-ipv6", action=u"store_false",
1202
dest=u"use_ipv6", help=u"Do not use IPv6")
1203
options = parser.parse_args()[0]
2159
1204
2160
1205
if options.check:
2161
1206
import doctest
2163
1208
sys.exit()
2164
1209
2165
1210
# Default values for config file for server-global settings
2166
server_defaults = { "interface": "",
2167
"address": "",
2168
"port": "",
2169
"debug": "False",
2170
"priority":
2171
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2172
"servicename": "Mandos",
2173
"use_dbus": "True",
2174
"use_ipv6": "True",
2175
"debuglevel": "",
2176
"restore": "True",
2177
"statedir": "/var/lib/mandos"
1211
server_defaults = { u"interface": u"",
1212
u"address": u"",
1213
u"port": u"",
1214
u"debug": u"False",
1215
u"priority":
1216
u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1217
u"servicename": u"Mandos",
1218
u"use_dbus": u"True",
1219
u"use_ipv6": u"True",
2178
1220
}
2179
1221
2180
1222
# Parse config file for server-global settings
2181
1223
server_config = configparser.SafeConfigParser(server_defaults)
2182
1224
del server_defaults
2183
1225
server_config.read(os.path.join(options.configdir,
2184
"mandos.conf"))
1226
u"mandos.conf"))
2185
1227
# Convert the SafeConfigParser object to a dict
2186
1228
server_settings = server_config.defaults()
2187
1229
# Use the appropriate methods on the non-string config options
2188
for option in ("debug", "use_dbus", "use_ipv6"):
2189
server_settings[option] = server_config.getboolean("DEFAULT",
1230
for option in (u"debug", u"use_dbus", u"use_ipv6"):
1231
server_settings[option] = server_config.getboolean(u"DEFAULT",
2190
1232
option)
2191
1233
if server_settings["port"]:
2192
server_settings["port"] = server_config.getint("DEFAULT",
2193
"port")
1234
server_settings["port"] = server_config.getint(u"DEFAULT",
1235
u"port")
2194
1236
del server_config
2195
1237
2196
1238
# Override the settings from the config file with command line
2197
1239
# options, if set.
2198
for option in ("interface", "address", "port", "debug",
2199
"priority", "servicename", "configdir",
2200
"use_dbus", "use_ipv6", "debuglevel", "restore",
2201
"statedir"):
1240
for option in (u"interface", u"address", u"port", u"debug",
1241
u"priority", u"servicename", u"configdir",
1242
u"use_dbus", u"use_ipv6"):
2202
1243
value = getattr(options, option)
2203
1244
if value is not None:
2204
1245
server_settings[option] = value
2212
1253
##################################################################
2213
1254
2214
1255
# For convenience
2215
debug = server_settings["debug"]
2216
debuglevel = server_settings["debuglevel"]
2217
use_dbus = server_settings["use_dbus"]
2218
use_ipv6 = server_settings["use_ipv6"]
2219
stored_state_path = os.path.join(server_settings["statedir"],
2220
stored_state_file)
2221
2222
if debug:
2223
initlogger(debug, logging.DEBUG)
2224
else:
2225
if not debuglevel:
2226
initlogger(debug)
2227
else:
2228
level = getattr(logging, debuglevel.upper())
2229
initlogger(debug, level)
2230
2231
if server_settings["servicename"] != "Mandos":
1256
debug = server_settings[u"debug"]
1257
use_dbus = server_settings[u"use_dbus"]
1258
use_dbus = False # XXX: Not done yet
1259
use_ipv6 = server_settings[u"use_ipv6"]
1260
1261
if not debug:
1262
syslogger.setLevel(logging.WARNING)
1263
console.setLevel(logging.WARNING)
1264
1265
if server_settings[u"servicename"] != u"Mandos":
2232
1266
syslogger.setFormatter(logging.Formatter
2233
('Mandos ({0}) [%(process)d]:'
2234
' %(levelname)s: %(message)s'
2235
.format(server_settings
2236
["servicename"])))
1267
(u'Mandos (%s) [%%(process)d]:'
1268
u' %%(levelname)s: %%(message)s'
1269
% server_settings[u"servicename"]))
2237
1270
2238
1271
# Parse config file with clients
2239
client_config = configparser.SafeConfigParser(Client
2240
.client_defaults)
2241
client_config.read(os.path.join(server_settings["configdir"],
2242
"clients.conf"))
1272
client_defaults = { u"timeout": u"1h",
1273
u"interval": u"5m",
1274
u"checker": u"fping -q -- %%(host)s",
1275
u"host": u"",
1276
}
1277
client_config = configparser.SafeConfigParser(client_defaults)
1278
client_config.read(os.path.join(server_settings[u"configdir"],
1279
u"clients.conf"))
2243
1280
2244
1281
global mandos_dbus_service
2245
1282
mandos_dbus_service = None
2246
1283
2247
tcp_server = MandosServer((server_settings["address"],
2248
server_settings["port"]),
1284
tcp_server = MandosServer((server_settings[u"address"],
1285
server_settings[u"port"]),
2249
1286
ClientHandler,
2250
interface=(server_settings["interface"]
2251
or None),
1287
interface=server_settings[u"interface"],
2252
1288
use_ipv6=use_ipv6,
2253
1289
gnutls_priority=
2254
server_settings["priority"],
1290
server_settings[u"priority"],
2255
1291
use_dbus=use_dbus)
2256
if not debug:
2257
pidfilename = "/var/run/mandos.pid"
2258
try:
2259
pidfile = open(pidfilename, "w")
2260
except IOError as e:
2261
logger.error("Could not open file %r", pidfilename,
2262
exc_info=e)
1292
pidfilename = u"/var/run/mandos.pid"
1293
try:
1294
pidfile = open(pidfilename, u"w")
1295
except IOError:
1296
logger.error(u"Could not open file %r", pidfilename)
2263
1297
2264
for name in ("_mandos", "mandos", "nobody"):
1298
try:
1299
uid = pwd.getpwnam(u"_mandos").pw_uid
1300
gid = pwd.getpwnam(u"_mandos").pw_gid
1301
except KeyError:
2265
1302
try:
2266
uid = pwd.getpwnam(name).pw_uid
2267
gid = pwd.getpwnam(name).pw_gid
2268
break
1303
uid = pwd.getpwnam(u"mandos").pw_uid
1304
gid = pwd.getpwnam(u"mandos").pw_gid
2269
1305
except KeyError:
2270
continue
2271
else:
2272
uid = 65534
2273
gid = 65534
1306
try:
1307
uid = pwd.getpwnam(u"nobody").pw_uid
1308
gid = pwd.getpwnam(u"nobody").pw_gid
1309
except KeyError:
1310
uid = 65534
1311
gid = 65534
2274
1312
try:
2275
1313
os.setgid(gid)
2276
1314
os.setuid(uid)
2277
except OSError as error:
1315
except OSError, error:
2278
1316
if error[0] != errno.EPERM:
2279
1317
raise error
2280
1318
1319
# Enable all possible GnuTLS debugging
2281
1320
if debug:
2282
# Enable all possible GnuTLS debugging
2283
2284
1321
# "Use a log level over 10 to enable all debugging options."
2285
1322
# - GnuTLS manual
2286
1323
gnutls.library.functions.gnutls_global_set_log_level(11)
2287
1324
2288
1325
@gnutls.library.types.gnutls_log_func
2289
1326
def debug_gnutls(level, string):
2290
logger.debug("GnuTLS: %s", string[:-1])
1327
logger.debug(u"GnuTLS: %s", string[:-1])
2291
1328
2292
1329
(gnutls.library.functions
2293
1330
.gnutls_global_set_log_function(debug_gnutls))
2294
2295
# Redirect stdin so all checkers get /dev/null
2296
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2297
os.dup2(null, sys.stdin.fileno())
2298
if null > 2:
2299
os.close(null)
2300
2301
# Need to fork before connecting to D-Bus
2302
if not debug:
2303
# Close all input and output, do double fork, etc.
2304
daemon()
2305
2306
gobject.threads_init()
2307
1331
2308
1332
global main_loop
2309
1333
# From the Avahi example code
2310
DBusGMainLoop(set_as_default=True)
1334
DBusGMainLoop(set_as_default=True )
2311
1335
main_loop = gobject.MainLoop()
2312
1336
bus = dbus.SystemBus()
2313
1337
# End of Avahi example code
2314
1338
if use_dbus:
2315
try:
2316
bus_name = dbus.service.BusName("se.recompile.Mandos",
2317
bus, do_not_queue=True)
2318
old_bus_name = (dbus.service.BusName
2319
("se.bsnet.fukt.Mandos", bus,
2320
do_not_queue=True))
2321
except dbus.exceptions.NameExistsException as e:
2322
logger.error("Disabling D-Bus:", exc_info=e)
2323
use_dbus = False
2324
server_settings["use_dbus"] = False
2325
tcp_server.use_dbus = False
1339
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
2326
1340
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2327
service = AvahiServiceToSyslog(name =
2328
server_settings["servicename"],
2329
servicetype = "_mandos._tcp",
2330
protocol = protocol, bus = bus)
1341
service = AvahiService(name = server_settings[u"servicename"],
1342
servicetype = u"_mandos._tcp",
1343
protocol = protocol, bus = bus)
2331
1344
if server_settings["interface"]:
2332
1345
service.interface = (if_nametoindex
2333
(str(server_settings["interface"])))
2334
2335
global multiprocessing_manager
2336
multiprocessing_manager = multiprocessing.Manager()
1346
(str(server_settings[u"interface"])))
2337
1347
2338
1348
client_class = Client
2339
1349
if use_dbus:
2340
client_class = functools.partial(ClientDBusTransitional,
2341
bus = bus)
2342
2343
client_settings = Client.config_parser(client_config)
2344
old_client_settings = {}
2345
clients_data = {}
2346
2347
# Get client data and settings from last running state.
2348
if server_settings["restore"]:
2349
try:
2350
with open(stored_state_path, "rb") as stored_state:
2351
clients_data, old_client_settings = (pickle.load
2352
(stored_state))
2353
os.remove(stored_state_path)
2354
except IOError as e:
2355
if e.errno == errno.ENOENT:
2356
logger.warning("Could not load persistent state: {0}"
2357
.format(os.strerror(e.errno)))
2358
else:
2359
logger.critical("Could not load persistent state:",
2360
exc_info=e)
2361
raise
2362
except EOFError as e:
2363
logger.warning("Could not load persistent state: "
2364
"EOFError:", exc_info=e)
2365
2366
with PGPEngine() as pgp:
2367
for client_name, client in clients_data.iteritems():
2368
# Decide which value to use after restoring saved state.
2369
# We have three different values: Old config file,
2370
# new config file, and saved state.
2371
# New config value takes precedence if it differs from old
2372
# config value, otherwise use saved state.
2373
for name, value in client_settings[client_name].items():
2374
try:
2375
# For each value in new config, check if it
2376
# differs from the old config value (Except for
2377
# the "secret" attribute)
2378
if (name != "secret" and
2379
value != old_client_settings[client_name]
2380
[name]):
2381
client[name] = value
2382
except KeyError:
2383
pass
2384
2385
# Clients who has passed its expire date can still be
2386
# enabled if its last checker was successful. Clients
2387
# whose checker succeeded before we stored its state is
2388
# assumed to have successfully run all checkers during
2389
# downtime.
2390
if client["enabled"]:
2391
if datetime.datetime.utcnow() >= client["expires"]:
2392
if not client["last_checked_ok"]:
2393
logger.warning(
2394
"disabling client {0} - Client never "
2395
"performed a successful checker"
2396
.format(client_name))
2397
client["enabled"] = False
2398
elif client["last_checker_status"] != 0:
2399
logger.warning(
2400
"disabling client {0} - Client "
2401
"last checker failed with error code {1}"
2402
.format(client_name,
2403
client["last_checker_status"]))
2404
client["enabled"] = False
2405
else:
2406
client["expires"] = (datetime.datetime
2407
.utcnow()
2408
+ client["timeout"])
2409
logger.debug("Last checker succeeded,"
2410
" keeping {0} enabled"
2411
.format(client_name))
2412
try:
2413
client["secret"] = (
2414
pgp.decrypt(client["encrypted_secret"],
2415
client_settings[client_name]
2416
["secret"]))
2417
except PGPError:
2418
# If decryption fails, we use secret from new settings
2419
logger.debug("Failed to decrypt {0} old secret"
2420
.format(client_name))
2421
client["secret"] = (
2422
client_settings[client_name]["secret"])
2423
2424
# Add/remove clients based on new changes made to config
2425
for client_name in (set(old_client_settings)
2426
- set(client_settings)):
2427
del clients_data[client_name]
2428
for client_name in (set(client_settings)
2429
- set(old_client_settings)):
2430
clients_data[client_name] = client_settings[client_name]
2431
2432
# Create all client objects
2433
for client_name, client in clients_data.iteritems():
2434
tcp_server.clients[client_name] = client_class(
2435
name = client_name, settings = client)
2436
1350
client_class = functools.partial(ClientDBus, bus = bus)
1351
tcp_server.clients.update(set(
1352
client_class(name = section,
1353
config= dict(client_config.items(section)))
1354
for section in client_config.sections()))
2437
1355
if not tcp_server.clients:
2438
logger.warning("No clients defined")
1356
logger.warning(u"No clients defined")
1357
1358
if debug:
1359
# Redirect stdin so all checkers get /dev/null
1360
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1361
os.dup2(null, sys.stdin.fileno())
1362
if null > 2:
1363
os.close(null)
1364
else:
1365
# No console logging
1366
logger.removeHandler(console)
1367
# Close all input and output, do double fork, etc.
1368
daemon()
1369
1370
try:
1371
with closing(pidfile):
1372
pid = os.getpid()
1373
pidfile.write(str(pid) + "\n")
1374
del pidfile
1375
except IOError:
1376
logger.error(u"Could not write to file %r with PID %d",
1377
pidfilename, pid)
1378
except NameError:
1379
# "pidfile" was never created
1380
pass
1381
del pidfilename
1382
1383
def cleanup():
1384
"Cleanup function; run on exit"
1385
service.cleanup()
1386
1387
while tcp_server.clients:
1388
client = tcp_server.clients.pop()
1389
client.disable_hook = None
1390
client.disable()
1391
1392
atexit.register(cleanup)
2439
1393
2440
1394
if not debug:
2441
try:
2442
with pidfile:
2443
pid = os.getpid()
2444
pidfile.write(str(pid) + "\n".encode("utf-8"))
2445
del pidfile
2446
except IOError:
2447
logger.error("Could not write to file %r with PID %d",
2448
pidfilename, pid)
2449
except NameError:
2450
# "pidfile" was never created
2451
pass
2452
del pidfilename
2453
1395
signal.signal(signal.SIGINT, signal.SIG_IGN)
2454
2455
1396
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2456
1397
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2457
1398
2458
1399
if use_dbus:
2459
class MandosDBusService(DBusObjectWithProperties):
1400
class MandosDBusService(dbus.service.Object):
2460
1401
"""A D-Bus proxy object"""
2461
1402
def __init__(self):
2462
dbus.service.Object.__init__(self, bus, "/")
2463
_interface = "se.recompile.Mandos"
2464
2465
@dbus_interface_annotations(_interface)
2466
def _foo(self):
2467
return { "org.freedesktop.DBus.Property"
2468
".EmitsChangedSignal":
2469
"false"}
2470
2471
@dbus.service.signal(_interface, signature="o")
2472
def ClientAdded(self, objpath):
2473
"D-Bus signal"
2474
pass
2475
2476
@dbus.service.signal(_interface, signature="ss")
2477
def ClientNotFound(self, fingerprint, address):
2478
"D-Bus signal"
2479
pass
2480
2481
@dbus.service.signal(_interface, signature="os")
1403
dbus.service.Object.__init__(self, bus, u"/")
1404
_interface = u"se.bsnet.fukt.Mandos"
1405
1406
@dbus.service.signal(_interface, signature=u"oa{sv}")
1407
def ClientAdded(self, objpath, properties):
1408
"D-Bus signal"
1409
pass
1410
1411
@dbus.service.signal(_interface, signature=u"s")
1412
def ClientNotFound(self, fingerprint):
1413
"D-Bus signal"
1414
pass
1415
1416
@dbus.service.signal(_interface, signature=u"os")
2482
1417
def ClientRemoved(self, objpath, name):
2483
1418
"D-Bus signal"
2484
1419
pass
2485
1420
2486
@dbus.service.method(_interface, out_signature="ao")
1421
@dbus.service.method(_interface, out_signature=u"ao")
2487
1422
def GetAllClients(self):
2488
1423
"D-Bus method"
2489
1424
return dbus.Array(c.dbus_object_path
2490
for c in
2491
tcp_server.clients.itervalues())
1425
for c in tcp_server.clients)
2492
1426
2493
1427
@dbus.service.method(_interface,
2494
out_signature="a{oa{sv}}")
1428
out_signature=u"a{oa{sv}}")
2495
1429
def GetAllClientsWithProperties(self):
2496
1430
"D-Bus method"
2497
1431
return dbus.Dictionary(
2498
((c.dbus_object_path, c.GetAll(""))
2499
for c in tcp_server.clients.itervalues()),
2500
signature="oa{sv}")
1432
((c.dbus_object_path, c.GetAllProperties())
1433
for c in tcp_server.clients),
1434
signature=u"oa{sv}")
2501
1435
2502
@dbus.service.method(_interface, in_signature="o")
1436
@dbus.service.method(_interface, in_signature=u"o")
2503
1437
def RemoveClient(self, object_path):
2504
1438
"D-Bus method"
2505
for c in tcp_server.clients.itervalues():
1439
for c in tcp_server.clients:
2506
1440
if c.dbus_object_path == object_path:
2507
del tcp_server.clients[c.name]
1441
tcp_server.clients.remove(c)
2508
1442
c.remove_from_connection()
2509
1443
# Don't signal anything except ClientRemoved
2510
c.disable(quiet=True)
1444
c.disable(signal=False)
2511
1445
# Emit D-Bus signal
2512
1446
self.ClientRemoved(object_path, c.name)
2513
1447
return
2514
raise KeyError(object_path)
1448
raise KeyError
2515
1449
2516
1450
del _interface
2517
1451
2518
class MandosDBusServiceTransitional(MandosDBusService):
2519
__metaclass__ = AlternateDBusNamesMetaclass
2520
mandos_dbus_service = MandosDBusServiceTransitional()
2521
2522
def cleanup():
2523
"Cleanup function; run on exit"
2524
service.cleanup()
2525
2526
multiprocessing.active_children()
2527
if not (tcp_server.clients or client_settings):
2528
return
2529
2530
# Store client before exiting. Secrets are encrypted with key
2531
# based on what config file has. If config file is
2532
# removed/edited, old secret will thus be unrecovable.
2533
clients = {}
2534
with PGPEngine() as pgp:
2535
for client in tcp_server.clients.itervalues():
2536
key = client_settings[client.name]["secret"]
2537
client.encrypted_secret = pgp.encrypt(client.secret,
2538
key)
2539
client_dict = {}
2540
2541
# A list of attributes that can not be pickled
2542
# + secret.
2543
exclude = set(("bus", "changedstate", "secret",
2544
"checker"))
2545
for name, typ in (inspect.getmembers
2546
(dbus.service.Object)):
2547
exclude.add(name)
2548
2549
client_dict["encrypted_secret"] = (client
2550
.encrypted_secret)
2551
for attr in client.client_structure:
2552
if attr not in exclude:
2553
client_dict[attr] = getattr(client, attr)
2554
2555
clients[client.name] = client_dict
2556
del client_settings[client.name]["secret"]
2557
2558
try:
2559
tempfd, tempname = tempfile.mkstemp(suffix=".pickle",
2560
prefix="clients-",
2561
dir=os.path.dirname
2562
(stored_state_path))
2563
with os.fdopen(tempfd, "wb") as stored_state:
2564
pickle.dump((clients, client_settings), stored_state)
2565
os.rename(tempname, stored_state_path)
2566
except (IOError, OSError) as e:
2567
if not debug:
2568
try:
2569
os.remove(tempname)
2570
except NameError:
2571
pass
2572
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
2573
logger.warning("Could not save persistent state: {0}"
2574
.format(os.strerror(e.errno)))
2575
else:
2576
logger.warning("Could not save persistent state:",
2577
exc_info=e)
2578
raise e
2579
2580
# Delete all clients, and settings from config
2581
while tcp_server.clients:
2582
name, client = tcp_server.clients.popitem()
2583
if use_dbus:
2584
client.remove_from_connection()
2585
# Don't signal anything except ClientRemoved
2586
client.disable(quiet=True)
2587
if use_dbus:
2588
# Emit D-Bus signal
2589
mandos_dbus_service.ClientRemoved(client
2590
.dbus_object_path,
2591
client.name)
2592
client_settings.clear()
2593
2594
atexit.register(cleanup)
2595
2596
for client in tcp_server.clients.itervalues():
1452
mandos_dbus_service = MandosDBusService()
1453
1454
for client in tcp_server.clients:
2597
1455
if use_dbus:
2598
1456
# Emit D-Bus signal
2599
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2600
# Need to initiate checking of clients
2601
if client.enabled:
2602
client.init_checker()
1457
mandos_dbus_service.ClientAdded(client.dbus_object_path,
1458
client.GetAllProperties())
1459
client.enable()
2603
1460
2604
1461
tcp_server.enable()
2605
1462
tcp_server.server_activate()
2607
1464
# Find out what port we got
2608
1465
service.port = tcp_server.socket.getsockname()[1]
2609
1466
if use_ipv6:
2610
logger.info("Now listening on address %r, port %d,"
2611
" flowinfo %d, scope_id %d",
2612
*tcp_server.socket.getsockname())
1467
logger.info(u"Now listening on address %r, port %d,"
1468
" flowinfo %d, scope_id %d"
1469
% tcp_server.socket.getsockname())
2613
1470
else: # IPv4
2614
logger.info("Now listening on address %r, port %d",
2615
*tcp_server.socket.getsockname())
1471
logger.info(u"Now listening on address %r, port %d"
1472
% tcp_server.socket.getsockname())
2616
1473
2617
1474
#service.interface = tcp_server.socket.getsockname()[3]
2618
1475
2620
1477
# From the Avahi example code
2621
1478
try:
2622
1479
service.activate()
2623
except dbus.exceptions.DBusException as error:
2624
logger.critical("D-Bus Exception", exc_info=error)
2625
cleanup()
1480
except dbus.exceptions.DBusException, error:
1481
logger.critical(u"DBusException: %s", error)
2626
1482
sys.exit(1)
2627
1483
# End of Avahi example code
2628
1484
2631
1487
(tcp_server.handle_request
2632
1488
(*args[2:], **kwargs) or True))
2633
1489
2634
logger.debug("Starting main loop")
1490
logger.debug(u"Starting main loop")
2635
1491
main_loop.run()
2636
except AvahiError as error:
2637
logger.critical("Avahi Error", exc_info=error)
2638
cleanup()
1492
except AvahiError, error:
1493
logger.critical(u"AvahiError: %s", error)
2639
1494
sys.exit(1)
2640
1495
except KeyboardInterrupt:
2641
1496
if debug:
2642
print("", file=sys.stderr)
2643
logger.debug("Server received KeyboardInterrupt")
2644
logger.debug("Server exiting")
2645
# Must run before the D-Bus bus name gets deregistered
2646
cleanup()
1497
print >> sys.stderr
1498
logger.debug(u"Server received KeyboardInterrupt")
1499
logger.debug(u"Server exiting")
2647
1500
2648
1501
if __name__ == '__main__':
2649
1502
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0