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- Committer: Björn Påhlsson
- Date: 2011-09-24 14:11:08 UTC
- mto: This revision was merged to the branch mainline in revision 502.
- Revision ID: belorn@fukt.bsnet.se-20110924141108-uejkiva9fqwt8il8
Refactoring code related to PropertyChanged dbus signal. Made sending
PropertyChanged signal to a python properties of interval variables.
PropertyChanged signal to a python properties of interval variables.
- files removed:
- debian/mandos-client.examples
- debian/upstream
- network-hooks.d
- files modified:
- .bzrignore
added
removed
mandos
1
#!/usr/bin/python2.7
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#!/usr/bin/python
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# -*- mode: python; coding: utf-8 -*-
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#
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# Mandos server - give out binary blobs to connecting clients.
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# "AvahiService" class, and some lines in "main".
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#
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# Everything else is
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# Copyright © 2008-2015 Teddy Hogeborn
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# Copyright © 2008-2015 Björn Påhlsson
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# Copyright © 2008-2011 Teddy Hogeborn
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# Copyright © 2008-2011 Björn Påhlsson
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#
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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>.
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#
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from __future__ import (division, absolute_import, print_function,
35
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unicode_literals)
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from future_builtins import *
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import SocketServer as socketserver
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import socket
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import argparse
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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
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import binascii
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import tempfile
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import itertools
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import collections
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65
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import dbus
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import dbus.service
88
81
except ImportError:
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SO_BINDTODEVICE = None
90
83
91
if sys.version_info.major == 2:
92
str = unicode
93
94
version = "1.6.9"
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stored_state_file = "clients.pickle"
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logger = logging.getLogger()
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syslogger = None
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try:
101
if_nametoindex = ctypes.cdll.LoadLibrary(
102
ctypes.util.find_library("c")).if_nametoindex
103
except (OSError, AttributeError):
104
105
def if_nametoindex(interface):
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"Get an interface index the hard way, i.e. using fcntl()"
107
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
108
with contextlib.closing(socket.socket()) as s:
109
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
110
struct.pack(b"16s16x", interface))
111
interface_index = struct.unpack("I", ifreq[16:20])[0]
112
return interface_index
113
114
115
def initlogger(debug, level=logging.WARNING):
116
"""init logger and add loglevel"""
117
118
global syslogger
119
syslogger = (logging.handlers.SysLogHandler(
120
facility = logging.handlers.SysLogHandler.LOG_DAEMON,
121
address = "/dev/log"))
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syslogger.setFormatter(logging.Formatter
123
('Mandos [%(process)d]: %(levelname)s:'
124
' %(message)s'))
125
logger.addHandler(syslogger)
126
127
if debug:
128
console = logging.StreamHandler()
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console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
130
' [%(process)d]:'
131
' %(levelname)s:'
132
' %(message)s'))
133
logger.addHandler(console)
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logger.setLevel(level)
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136
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class PGPError(Exception):
138
"""Exception if encryption/decryption fails"""
139
pass
140
141
142
class PGPEngine(object):
143
"""A simple class for OpenPGP symmetric encryption & decryption"""
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def __init__(self):
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self.tempdir = tempfile.mkdtemp(prefix="mandos-")
147
self.gnupgargs = ['--batch',
148
'--home', self.tempdir,
149
'--force-mdc',
150
'--quiet',
151
'--no-use-agent']
152
153
def __enter__(self):
154
return self
155
156
def __exit__(self, exc_type, exc_value, traceback):
157
self._cleanup()
158
return False
159
160
def __del__(self):
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self._cleanup()
162
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def _cleanup(self):
164
if self.tempdir is not None:
165
# Delete contents of tempdir
166
for root, dirs, files in os.walk(self.tempdir,
167
topdown = False):
168
for filename in files:
169
os.remove(os.path.join(root, filename))
170
for dirname in dirs:
171
os.rmdir(os.path.join(root, dirname))
172
# Remove tempdir
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os.rmdir(self.tempdir)
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self.tempdir = None
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def password_encode(self, password):
177
# Passphrase can not be empty and can not contain newlines or
178
# NUL bytes. So we prefix it and hex encode it.
179
encoded = b"mandos" + binascii.hexlify(password)
180
if len(encoded) > 2048:
181
# GnuPG can't handle long passwords, so encode differently
182
encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
183
.replace(b"\n", b"\\n")
184
.replace(b"\0", b"\\x00"))
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return encoded
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def encrypt(self, data, password):
188
passphrase = self.password_encode(password)
189
with tempfile.NamedTemporaryFile(
190
dir=self.tempdir) as passfile:
191
passfile.write(passphrase)
192
passfile.flush()
193
proc = subprocess.Popen(['gpg', '--symmetric',
194
'--passphrase-file',
195
passfile.name]
196
+ self.gnupgargs,
197
stdin = subprocess.PIPE,
198
stdout = subprocess.PIPE,
199
stderr = subprocess.PIPE)
200
ciphertext, err = proc.communicate(input = data)
201
if proc.returncode != 0:
202
raise PGPError(err)
203
return ciphertext
204
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def decrypt(self, data, password):
206
passphrase = self.password_encode(password)
207
with tempfile.NamedTemporaryFile(
208
dir = self.tempdir) as passfile:
209
passfile.write(passphrase)
210
passfile.flush()
211
proc = subprocess.Popen(['gpg', '--decrypt',
212
'--passphrase-file',
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passfile.name]
214
+ self.gnupgargs,
215
stdin = subprocess.PIPE,
216
stdout = subprocess.PIPE,
217
stderr = subprocess.PIPE)
218
decrypted_plaintext, err = proc.communicate(input = data)
219
if proc.returncode != 0:
220
raise PGPError(err)
221
return decrypted_plaintext
222
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version = "1.3.1"
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#logger = logging.getLogger('mandos')
88
logger = logging.Logger('mandos')
89
syslogger = (logging.handlers.SysLogHandler
90
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
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address = str("/dev/log")))
92
syslogger.setFormatter(logging.Formatter
93
('Mandos [%(process)d]: %(levelname)s:'
94
' %(message)s'))
95
logger.addHandler(syslogger)
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console = logging.StreamHandler()
98
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
99
' %(levelname)s:'
100
' %(message)s'))
101
logger.addHandler(console)
223
102
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103
class AvahiError(Exception):
225
104
def __init__(self, value, *args, **kwargs):
226
105
self.value = value
227
return super(AvahiError, self).__init__(value, *args,
228
**kwargs)
229
106
super(AvahiError, self).__init__(value, *args, **kwargs)
107
def __unicode__(self):
108
return unicode(repr(self.value))
230
109
231
110
class AvahiServiceError(AvahiError):
232
111
pass
233
112
234
235
113
class AvahiGroupError(AvahiError):
236
114
pass
237
115
244
122
Used to optionally bind to the specified interface.
245
123
name: string; Example: 'Mandos'
246
124
type: string; Example: '_mandos._tcp'.
247
See <https://www.iana.org/assignments/service-names-port-numbers>
125
See <http://www.dns-sd.org/ServiceTypes.html>
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port: integer; what port to announce
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TXT: list of strings; TXT record for the service
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domain: string; Domain to publish on, default to .local if empty.
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134
server: D-Bus Server
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bus: dbus.SystemBus()
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"""
259
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def __init__(self,
261
interface = avahi.IF_UNSPEC,
262
name = None,
263
servicetype = None,
264
port = None,
265
TXT = None,
266
domain = "",
267
host = "",
268
max_renames = 32768,
269
protocol = avahi.PROTO_UNSPEC,
270
bus = None):
137
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
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servicetype = None, port = None, TXT = None,
139
domain = "", host = "", max_renames = 32768,
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protocol = avahi.PROTO_UNSPEC, bus = None):
271
141
self.interface = interface
272
142
self.name = name
273
143
self.type = servicetype
282
152
self.server = None
283
153
self.bus = bus
284
154
self.entry_group_state_changed_match = None
285
286
def rename(self, remove=True):
155
def rename(self):
287
156
"""Derived from the Avahi example code"""
288
157
if self.rename_count >= self.max_renames:
289
158
logger.critical("No suitable Zeroconf service name found"
290
159
" after %i retries, exiting.",
291
160
self.rename_count)
292
161
raise AvahiServiceError("Too many renames")
293
self.name = str(
294
self.server.GetAlternativeServiceName(self.name))
295
self.rename_count += 1
162
self.name = unicode(self.server.GetAlternativeServiceName(self.name))
296
163
logger.info("Changing Zeroconf service name to %r ...",
297
164
self.name)
298
if remove:
299
self.remove()
165
syslogger.setFormatter(logging.Formatter
166
('Mandos (%s) [%%(process)d]:'
167
' %%(levelname)s: %%(message)s'
168
% self.name))
169
self.remove()
300
170
try:
301
171
self.add()
302
172
except dbus.exceptions.DBusException as error:
303
if (error.get_dbus_name()
304
== "org.freedesktop.Avahi.CollisionError"):
305
logger.info("Local Zeroconf service name collision.")
306
return self.rename(remove=False)
307
else:
308
logger.critical("D-Bus Exception", exc_info=error)
309
self.cleanup()
310
os._exit(1)
311
173
logger.critical("DBusException: %s", error)
174
self.cleanup()
175
os._exit(1)
176
self.rename_count += 1
312
177
def remove(self):
313
178
"""Derived from the Avahi example code"""
314
179
if self.entry_group_state_changed_match is not None:
316
181
self.entry_group_state_changed_match = None
317
182
if self.group is not None:
318
183
self.group.Reset()
319
320
184
def add(self):
321
185
"""Derived from the Avahi example code"""
322
186
self.remove()
327
191
avahi.DBUS_INTERFACE_ENTRY_GROUP)
328
192
self.entry_group_state_changed_match = (
329
193
self.group.connect_to_signal(
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'StateChanged', self.entry_group_state_changed))
194
'StateChanged', self .entry_group_state_changed))
331
195
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
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196
self.name, self.type)
333
197
self.group.AddService(
339
203
dbus.UInt16(self.port),
340
204
avahi.string_array_to_txt_array(self.TXT))
341
205
self.group.Commit()
342
343
206
def entry_group_state_changed(self, state, error):
344
207
"""Derived from the Avahi example code"""
345
208
logger.debug("Avahi entry group state change: %i", state)
351
214
self.rename()
352
215
elif state == avahi.ENTRY_GROUP_FAILURE:
353
216
logger.critical("Avahi: Error in group state changed %s",
354
str(error))
355
raise AvahiGroupError("State changed: {!s}".format(error))
356
217
unicode(error))
218
raise AvahiGroupError("State changed: %s"
219
% unicode(error))
357
220
def cleanup(self):
358
221
"""Derived from the Avahi example code"""
359
222
if self.group is not None:
360
223
try:
361
224
self.group.Free()
362
225
except (dbus.exceptions.UnknownMethodException,
363
dbus.exceptions.DBusException):
226
dbus.exceptions.DBusException) as e:
364
227
pass
365
228
self.group = None
366
229
self.remove()
367
368
230
def server_state_changed(self, state, error=None):
369
231
"""Derived from the Avahi example code"""
370
232
logger.debug("Avahi server state change: %i", state)
371
bad_states = {
372
avahi.SERVER_INVALID: "Zeroconf server invalid",
373
avahi.SERVER_REGISTERING: None,
374
avahi.SERVER_COLLISION: "Zeroconf server name collision",
375
avahi.SERVER_FAILURE: "Zeroconf server failure",
376
}
233
bad_states = { avahi.SERVER_INVALID:
234
"Zeroconf server invalid",
235
avahi.SERVER_REGISTERING: None,
236
avahi.SERVER_COLLISION:
237
"Zeroconf server name collision",
238
avahi.SERVER_FAILURE:
239
"Zeroconf server failure" }
377
240
if state in bad_states:
378
241
if bad_states[state] is not None:
379
242
if error is None:
388
251
logger.debug("Unknown state: %r", state)
389
252
else:
390
253
logger.debug("Unknown state: %r: %r", state, error)
391
392
254
def activate(self):
393
255
"""Derived from the Avahi example code"""
394
256
if self.server is None:
398
260
follow_name_owner_changes=True),
399
261
avahi.DBUS_INTERFACE_SERVER)
400
262
self.server.connect_to_signal("StateChanged",
401
self.server_state_changed)
263
self.server_state_changed)
402
264
self.server_state_changed(self.server.GetState())
403
265
404
266
405
class AvahiServiceToSyslog(AvahiService):
406
def rename(self, *args, **kwargs):
407
"""Add the new name to the syslog messages"""
408
ret = AvahiService.rename(self, *args, **kwargs)
409
syslogger.setFormatter(logging.Formatter(
410
'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
411
.format(self.name)))
412
return ret
413
414
267
def _timedelta_to_milliseconds(td):
268
"Convert a datetime.timedelta() to milliseconds"
269
return ((td.days * 24 * 60 * 60 * 1000)
270
+ (td.seconds * 1000)
271
+ (td.microseconds // 1000))
272
415
273
class Client(object):
416
274
"""A representation of a client host served by this server.
417
275
418
276
Attributes:
419
approved: bool(); 'None' if not yet approved/disapproved
277
_approved: bool(); 'None' if not yet approved/disapproved
420
278
approval_delay: datetime.timedelta(); Time to wait for approval
421
279
approval_duration: datetime.timedelta(); Duration of one approval
422
280
checker: subprocess.Popen(); a running checker process used
429
287
instance %(name)s can be used in the command.
430
288
checker_initiator_tag: a gobject event source tag, or None
431
289
created: datetime.datetime(); (UTC) object creation
432
client_structure: Object describing what attributes a client has
433
and is used for storing the client at exit
434
290
current_checker_command: string; current running checker_command
291
disable_hook: If set, called by disable() as disable_hook(self)
435
292
disable_initiator_tag: a gobject event source tag, or None
436
293
enabled: bool()
437
294
fingerprint: string (40 or 32 hexadecimal digits); used to
440
297
interval: datetime.timedelta(); How often to start a new checker
441
298
last_approval_request: datetime.datetime(); (UTC) or None
442
299
last_checked_ok: datetime.datetime(); (UTC) or None
443
last_checker_status: integer between 0 and 255 reflecting exit
444
status of last checker. -1 reflects crashed
445
checker, -2 means no checker completed yet.
446
last_enabled: datetime.datetime(); (UTC) or None
300
last_enabled: datetime.datetime(); (UTC)
447
301
name: string; from the config file, used in log messages and
448
302
D-Bus identifiers
449
303
secret: bytestring; sent verbatim (over TLS) to client
450
304
timeout: datetime.timedelta(); How long from last_checked_ok
451
305
until this client is disabled
452
extended_timeout: extra long timeout when secret has been sent
306
extended_timeout: extra long timeout when password has been sent
453
307
runtime_expansions: Allowed attributes for runtime expansion.
454
308
expires: datetime.datetime(); time (UTC) when a client will be
455
309
disabled, or None
456
server_settings: The server_settings dict from main()
457
310
"""
458
311
459
312
runtime_expansions = ("approval_delay", "approval_duration",
460
"created", "enabled", "expires",
461
"fingerprint", "host", "interval",
462
"last_approval_request", "last_checked_ok",
313
"created", "enabled", "fingerprint",
314
"host", "interval", "last_checked_ok",
463
315
"last_enabled", "name", "timeout")
464
client_defaults = {
465
"timeout": "PT5M",
466
"extended_timeout": "PT15M",
467
"interval": "PT2M",
468
"checker": "fping -q -- %%(host)s",
469
"host": "",
470
"approval_delay": "PT0S",
471
"approval_duration": "PT1S",
472
"approved_by_default": "True",
473
"enabled": "True",
474
}
475
476
@staticmethod
477
def config_parser(config):
478
"""Construct a new dict of client settings of this form:
479
{ client_name: {setting_name: value, ...}, ...}
480
with exceptions for any special settings as defined above.
481
NOTE: Must be a pure function. Must return the same result
482
value given the same arguments.
483
"""
484
settings = {}
485
for client_name in config.sections():
486
section = dict(config.items(client_name))
487
client = settings[client_name] = {}
488
489
client["host"] = section["host"]
490
# Reformat values from string types to Python types
491
client["approved_by_default"] = config.getboolean(
492
client_name, "approved_by_default")
493
client["enabled"] = config.getboolean(client_name,
494
"enabled")
495
496
# Uppercase and remove spaces from fingerprint for later
497
# comparison purposes with return value from the
498
# fingerprint() function
499
client["fingerprint"] = (section["fingerprint"].upper()
500
.replace(" ", ""))
501
if "secret" in section:
502
client["secret"] = section["secret"].decode("base64")
503
elif "secfile" in section:
504
with open(os.path.expanduser(os.path.expandvars
505
(section["secfile"])),
506
"rb") as secfile:
507
client["secret"] = secfile.read()
508
else:
509
raise TypeError("No secret or secfile for section {}"
510
.format(section))
511
client["timeout"] = string_to_delta(section["timeout"])
512
client["extended_timeout"] = string_to_delta(
513
section["extended_timeout"])
514
client["interval"] = string_to_delta(section["interval"])
515
client["approval_delay"] = string_to_delta(
516
section["approval_delay"])
517
client["approval_duration"] = string_to_delta(
518
section["approval_duration"])
519
client["checker_command"] = section["checker"]
520
client["last_approval_request"] = None
521
client["last_checked_ok"] = None
522
client["last_checker_status"] = -2
523
316
524
return settings
525
526
def __init__(self, settings, name = None, server_settings=None):
317
def timeout_milliseconds(self):
318
"Return the 'timeout' attribute in milliseconds"
319
return _timedelta_to_milliseconds(self.timeout)
320
321
def extended_timeout_milliseconds(self):
322
"Return the 'extended_timeout' attribute in milliseconds"
323
return _timedelta_to_milliseconds(self.extended_timeout)
324
325
def interval_milliseconds(self):
326
"Return the 'interval' attribute in milliseconds"
327
return _timedelta_to_milliseconds(self.interval)
328
329
def approval_delay_milliseconds(self):
330
return _timedelta_to_milliseconds(self.approval_delay)
331
332
def __init__(self, name = None, disable_hook=None, config=None):
333
"""Note: the 'checker' key in 'config' sets the
334
'checker_command' attribute and *not* the 'checker'
335
attribute."""
527
336
self.name = name
528
if server_settings is None:
529
server_settings = {}
530
self.server_settings = server_settings
531
# adding all client settings
532
for setting, value in settings.items():
533
setattr(self, setting, value)
534
535
if self.enabled:
536
if not hasattr(self, "last_enabled"):
537
self.last_enabled = datetime.datetime.utcnow()
538
if not hasattr(self, "expires"):
539
self.expires = (datetime.datetime.utcnow()
540
+ self.timeout)
541
else:
542
self.last_enabled = None
543
self.expires = None
544
337
if config is None:
338
config = {}
545
339
logger.debug("Creating client %r", self.name)
340
# Uppercase and remove spaces from fingerprint for later
341
# comparison purposes with return value from the fingerprint()
342
# function
343
self.fingerprint = (config["fingerprint"].upper()
344
.replace(" ", ""))
546
345
logger.debug(" Fingerprint: %s", self.fingerprint)
547
self.created = settings.get("created",
548
datetime.datetime.utcnow())
549
550
# attributes specific for this server instance
346
if "secret" in config:
347
self.secret = config["secret"].decode("base64")
348
elif "secfile" in config:
349
with open(os.path.expanduser(os.path.expandvars
350
(config["secfile"])),
351
"rb") as secfile:
352
self.secret = secfile.read()
353
else:
354
raise TypeError("No secret or secfile for client %s"
355
% self.name)
356
self.host = config.get("host", "")
357
self.created = datetime.datetime.utcnow()
358
self.enabled = False
359
self.last_approval_request = None
360
self.last_enabled = None
361
self.last_checked_ok = None
362
self.timeout = string_to_delta(config["timeout"])
363
self.extended_timeout = string_to_delta(config["extended_timeout"])
364
self.interval = string_to_delta(config["interval"])
365
self.disable_hook = disable_hook
551
366
self.checker = None
552
367
self.checker_initiator_tag = None
553
368
self.disable_initiator_tag = None
369
self.expires = None
554
370
self.checker_callback_tag = None
371
self.checker_command = config["checker"]
555
372
self.current_checker_command = None
556
self.approved = None
373
self.last_connect = None
374
self._approved = None
375
self.approved_by_default = config.get("approved_by_default",
376
True)
557
377
self.approvals_pending = 0
558
self.changedstate = multiprocessing_manager.Condition(
559
multiprocessing_manager.Lock())
560
self.client_structure = [attr
561
for attr in self.__dict__.iterkeys()
562
if not attr.startswith("_")]
563
self.client_structure.append("client_structure")
564
565
for name, t in inspect.getmembers(
566
type(self), lambda obj: isinstance(obj, property)):
567
if not name.startswith("_"):
568
self.client_structure.append(name)
378
self.approval_delay = string_to_delta(
379
config["approval_delay"])
380
self.approval_duration = string_to_delta(
381
config["approval_duration"])
382
self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())
569
383
570
# Send notice to process children that client state has changed
571
384
def send_changedstate(self):
572
with self.changedstate:
573
self.changedstate.notify_all()
574
385
self.changedstate.acquire()
386
self.changedstate.notify_all()
387
self.changedstate.release()
388
575
389
def enable(self):
576
390
"""Start this client's checker and timeout hooks"""
577
391
if getattr(self, "enabled", False):
578
392
# Already enabled
579
393
return
394
self.send_changedstate()
395
# Schedule a new checker to be started an 'interval' from now,
396
# and every interval from then on.
397
self.checker_initiator_tag = (gobject.timeout_add
398
(self.interval_milliseconds(),
399
self.start_checker))
400
# Schedule a disable() when 'timeout' has passed
580
401
self.expires = datetime.datetime.utcnow() + self.timeout
402
self.disable_initiator_tag = (gobject.timeout_add
403
(self.timeout_milliseconds(),
404
self.disable))
581
405
self.enabled = True
582
406
self.last_enabled = datetime.datetime.utcnow()
583
self.init_checker()
584
self.send_changedstate()
407
# Also start a new checker *right now*.
408
self.start_checker()
585
409
586
410
def disable(self, quiet=True):
587
411
"""Disable this client."""
588
412
if not getattr(self, "enabled", False):
589
413
return False
590
414
if not quiet:
415
self.send_changedstate()
416
if not quiet:
591
417
logger.info("Disabling client %s", self.name)
592
if getattr(self, "disable_initiator_tag", None) is not None:
418
if getattr(self, "disable_initiator_tag", False):
593
419
gobject.source_remove(self.disable_initiator_tag)
594
420
self.disable_initiator_tag = None
595
421
self.expires = None
596
if getattr(self, "checker_initiator_tag", None) is not None:
422
if getattr(self, "checker_initiator_tag", False):
597
423
gobject.source_remove(self.checker_initiator_tag)
598
424
self.checker_initiator_tag = None
599
425
self.stop_checker()
426
if self.disable_hook:
427
self.disable_hook(self)
600
428
self.enabled = False
601
if not quiet:
602
self.send_changedstate()
603
429
# Do not run this again if called by a gobject.timeout_add
604
430
return False
605
431
606
432
def __del__(self):
433
self.disable_hook = None
607
434
self.disable()
608
435
609
def init_checker(self):
610
# Schedule a new checker to be started an 'interval' from now,
611
# and every interval from then on.
612
if self.checker_initiator_tag is not None:
613
gobject.source_remove(self.checker_initiator_tag)
614
self.checker_initiator_tag = gobject.timeout_add(
615
int(self.interval.total_seconds() * 1000),
616
self.start_checker)
617
# Schedule a disable() when 'timeout' has passed
618
if self.disable_initiator_tag is not None:
619
gobject.source_remove(self.disable_initiator_tag)
620
self.disable_initiator_tag = gobject.timeout_add(
621
int(self.timeout.total_seconds() * 1000), self.disable)
622
# Also start a new checker *right now*.
623
self.start_checker()
624
625
436
def checker_callback(self, pid, condition, command):
626
437
"""The checker has completed, so take appropriate actions."""
627
438
self.checker_callback_tag = None
628
439
self.checker = None
629
440
if os.WIFEXITED(condition):
630
self.last_checker_status = os.WEXITSTATUS(condition)
631
if self.last_checker_status == 0:
441
exitstatus = os.WEXITSTATUS(condition)
442
if exitstatus == 0:
632
443
logger.info("Checker for %(name)s succeeded",
633
444
vars(self))
634
445
self.checked_ok()
635
446
else:
636
logger.info("Checker for %(name)s failed", vars(self))
447
logger.info("Checker for %(name)s failed",
448
vars(self))
637
449
else:
638
self.last_checker_status = -1
639
450
logger.warning("Checker for %(name)s crashed?",
640
451
vars(self))
641
452
642
def checked_ok(self):
643
"""Assert that the client has been seen, alive and well."""
644
self.last_checked_ok = datetime.datetime.utcnow()
645
self.last_checker_status = 0
646
self.bump_timeout()
647
648
def bump_timeout(self, timeout=None):
649
"""Bump up the timeout for this client."""
453
def checked_ok(self, timeout=None):
454
"""Bump up the timeout for this client.
455
456
This should only be called when the client has been seen,
457
alive and well.
458
"""
650
459
if timeout is None:
651
460
timeout = self.timeout
652
if self.disable_initiator_tag is not None:
653
gobject.source_remove(self.disable_initiator_tag)
654
self.disable_initiator_tag = None
655
if getattr(self, "enabled", False):
656
self.disable_initiator_tag = gobject.timeout_add(
657
int(timeout.total_seconds() * 1000), self.disable)
658
self.expires = datetime.datetime.utcnow() + timeout
461
self.last_checked_ok = datetime.datetime.utcnow()
462
gobject.source_remove(self.disable_initiator_tag)
463
self.expires = datetime.datetime.utcnow() + timeout
464
self.disable_initiator_tag = (gobject.timeout_add
465
(_timedelta_to_milliseconds(timeout),
466
self.disable))
659
467
660
468
def need_approval(self):
661
469
self.last_approval_request = datetime.datetime.utcnow()
666
474
If a checker already exists, leave it running and do
667
475
nothing."""
668
476
# The reason for not killing a running checker is that if we
669
# did that, and if a checker (for some reason) started running
670
# slowly and taking more than 'interval' time, then the client
671
# would inevitably timeout, since no checker would get a
672
# chance to run to completion. If we instead leave running
477
# did that, then if a checker (for some reason) started
478
# running slowly and taking more than 'interval' time, the
479
# client would inevitably timeout, since no checker would get
480
# a chance to run to completion. If we instead leave running
673
481
# checkers alone, the checker would have to take more time
674
482
# than 'timeout' for the client to be disabled, which is as it
675
483
# should be.
677
485
# If a checker exists, make sure it is not a zombie
678
486
try:
679
487
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
680
except AttributeError:
681
pass
682
except OSError as error:
683
if error.errno != errno.ECHILD:
684
raise
488
except (AttributeError, OSError) as error:
489
if (isinstance(error, OSError)
490
and error.errno != errno.ECHILD):
491
raise error
685
492
else:
686
493
if pid:
687
494
logger.warning("Checker was a zombie")
690
497
self.current_checker_command)
691
498
# Start a new checker if needed
692
499
if self.checker is None:
693
# Escape attributes for the shell
694
escaped_attrs = {
695
attr: re.escape(str(getattr(self, attr)))
696
for attr in self.runtime_expansions }
697
500
try:
698
command = self.checker_command % escaped_attrs
699
except TypeError as error:
700
logger.error('Could not format string "%s"',
701
self.checker_command,
702
exc_info=error)
703
return True # Try again later
501
# In case checker_command has exactly one % operator
502
command = self.checker_command % self.host
503
except TypeError:
504
# Escape attributes for the shell
505
escaped_attrs = dict(
506
(attr,
507
re.escape(unicode(str(getattr(self, attr, "")),
508
errors=
509
'replace')))
510
for attr in
511
self.runtime_expansions)
512
513
try:
514
command = self.checker_command % escaped_attrs
515
except TypeError as error:
516
logger.error('Could not format string "%s":'
517
' %s', self.checker_command, error)
518
return True # Try again later
704
519
self.current_checker_command = command
705
520
try:
706
logger.info("Starting checker %r for %s", command,
707
self.name)
521
logger.info("Starting checker %r for %s",
522
command, self.name)
708
523
# We don't need to redirect stdout and stderr, since
709
524
# in normal mode, that is already done by daemon(),
710
525
# and in debug mode we don't want to. (Stdin is
711
526
# always replaced by /dev/null.)
712
# The exception is when not debugging but nevertheless
713
# running in the foreground; use the previously
714
# created wnull.
715
popen_args = {}
716
if (not self.server_settings["debug"]
717
and self.server_settings["foreground"]):
718
popen_args.update({"stdout": wnull,
719
"stderr": wnull })
720
527
self.checker = subprocess.Popen(command,
721
528
close_fds=True,
722
shell=True,
723
cwd="/",
724
**popen_args)
725
except OSError as error:
726
logger.error("Failed to start subprocess",
727
exc_info=error)
728
return True
729
self.checker_callback_tag = gobject.child_watch_add(
730
self.checker.pid, self.checker_callback, data=command)
731
# The checker may have completed before the gobject
732
# watch was added. Check for this.
733
try:
529
shell=True, cwd="/")
530
self.checker_callback_tag = (gobject.child_watch_add
531
(self.checker.pid,
532
self.checker_callback,
533
data=command))
534
# The checker may have completed before the gobject
535
# watch was added. Check for this.
734
536
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
537
if pid:
538
gobject.source_remove(self.checker_callback_tag)
539
self.checker_callback(pid, status, command)
735
540
except OSError as error:
736
if error.errno == errno.ECHILD:
737
# This should never happen
738
logger.error("Child process vanished",
739
exc_info=error)
740
return True
741
raise
742
if pid:
743
gobject.source_remove(self.checker_callback_tag)
744
self.checker_callback(pid, status, command)
541
logger.error("Failed to start subprocess: %s",
542
error)
745
543
# Re-run this periodically if run by gobject.timeout_add
746
544
return True
747
545
754
552
return
755
553
logger.debug("Stopping checker for %(name)s", vars(self))
756
554
try:
757
self.checker.terminate()
555
os.kill(self.checker.pid, signal.SIGTERM)
758
556
#time.sleep(0.5)
759
557
#if self.checker.poll() is None:
760
# self.checker.kill()
558
# os.kill(self.checker.pid, signal.SIGKILL)
761
559
except OSError as error:
762
560
if error.errno != errno.ESRCH: # No such process
763
561
raise
764
562
self.checker = None
765
563
766
767
def dbus_service_property(dbus_interface,
768
signature="v",
769
access="readwrite",
770
byte_arrays=False):
564
def dbus_service_property(dbus_interface, signature="v",
565
access="readwrite", byte_arrays=False):
771
566
"""Decorators for marking methods of a DBusObjectWithProperties to
772
567
become properties on the D-Bus.
773
568
782
577
# "Set" method, so we fail early here:
783
578
if byte_arrays and signature != "ay":
784
579
raise ValueError("Byte arrays not supported for non-'ay'"
785
" signature {!r}".format(signature))
786
580
" signature %r" % signature)
787
581
def decorator(func):
788
582
func._dbus_is_property = True
789
583
func._dbus_interface = dbus_interface
794
588
func._dbus_name = func._dbus_name[:-14]
795
589
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
796
590
return func
797
798
return decorator
799
800
801
def dbus_interface_annotations(dbus_interface):
802
"""Decorator for marking functions returning interface annotations
803
804
Usage:
805
806
@dbus_interface_annotations("org.example.Interface")
807
def _foo(self): # Function name does not matter
808
return {"org.freedesktop.DBus.Deprecated": "true",
809
"org.freedesktop.DBus.Property.EmitsChangedSignal":
810
"false"}
811
"""
812
813
def decorator(func):
814
func._dbus_is_interface = True
815
func._dbus_interface = dbus_interface
816
func._dbus_name = dbus_interface
817
return func
818
819
return decorator
820
821
822
def dbus_annotations(annotations):
823
"""Decorator to annotate D-Bus methods, signals or properties
824
Usage:
825
826
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
827
"org.freedesktop.DBus.Property."
828
"EmitsChangedSignal": "false"})
829
@dbus_service_property("org.example.Interface", signature="b",
830
access="r")
831
def Property_dbus_property(self):
832
return dbus.Boolean(False)
833
"""
834
835
def decorator(func):
836
func._dbus_annotations = annotations
837
return func
838
839
591
return decorator
840
592
841
593
842
594
class DBusPropertyException(dbus.exceptions.DBusException):
843
595
"""A base class for D-Bus property-related exceptions
844
596
"""
845
pass
597
def __unicode__(self):
598
return unicode(str(self))
846
599
847
600
848
601
class DBusPropertyAccessException(DBusPropertyException):
859
612
860
613
class DBusObjectWithProperties(dbus.service.Object):
861
614
"""A D-Bus object with properties.
862
615
863
616
Classes inheriting from this can use the dbus_service_property
864
617
decorator to expose methods as D-Bus properties. It exposes the
865
618
standard Get(), Set(), and GetAll() methods on the D-Bus.
866
619
"""
867
620
868
621
@staticmethod
869
def _is_dbus_thing(thing):
870
"""Returns a function testing if an attribute is a D-Bus thing
871
872
If called like _is_dbus_thing("method") it returns a function
873
suitable for use as predicate to inspect.getmembers().
874
"""
875
return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
876
False)
622
def _is_dbus_property(obj):
623
return getattr(obj, "_dbus_is_property", False)
877
624
878
def _get_all_dbus_things(self, thing):
625
def _get_all_dbus_properties(self):
879
626
"""Returns a generator of (name, attribute) pairs
880
627
"""
881
return ((getattr(athing.__get__(self), "_dbus_name", name),
882
athing.__get__(self))
883
for cls in self.__class__.__mro__
884
for name, athing in
885
inspect.getmembers(cls, self._is_dbus_thing(thing)))
628
return ((prop._dbus_name, prop)
629
for name, prop in
630
inspect.getmembers(self, self._is_dbus_property))
886
631
887
632
def _get_dbus_property(self, interface_name, property_name):
888
633
"""Returns a bound method if one exists which is a D-Bus
889
634
property with the specified name and interface.
890
635
"""
891
for cls in self.__class__.__mro__:
892
for name, value in inspect.getmembers(
893
cls, self._is_dbus_thing("property")):
894
if (value._dbus_name == property_name
895
and value._dbus_interface == interface_name):
896
return value.__get__(self)
897
636
for name in (property_name,
637
property_name + "_dbus_property"):
638
prop = getattr(self, name, None)
639
if (prop is None
640
or not self._is_dbus_property(prop)
641
or prop._dbus_name != property_name
642
or (interface_name and prop._dbus_interface
643
and interface_name != prop._dbus_interface)):
644
continue
645
return prop
898
646
# No such property
899
raise DBusPropertyNotFound("{}:{}.{}".format(
900
self.dbus_object_path, interface_name, property_name))
647
raise DBusPropertyNotFound(self.dbus_object_path + ":"
648
+ interface_name + "."
649
+ property_name)
901
650
902
@dbus.service.method(dbus.PROPERTIES_IFACE,
903
in_signature="ss",
651
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
904
652
out_signature="v")
905
653
def Get(self, interface_name, property_name):
906
654
"""Standard D-Bus property Get() method, see D-Bus standard.
924
672
# The byte_arrays option is not supported yet on
925
673
# signatures other than "ay".
926
674
if prop._dbus_signature != "ay":
927
raise ValueError("Byte arrays not supported for non-"
928
"'ay' signature {!r}"
929
.format(prop._dbus_signature))
930
value = dbus.ByteArray(b''.join(chr(byte)
931
for byte in value))
675
raise ValueError
676
value = dbus.ByteArray(''.join(unichr(byte)
677
for byte in value))
932
678
prop(value)
933
679
934
@dbus.service.method(dbus.PROPERTIES_IFACE,
935
in_signature="s",
680
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
936
681
out_signature="a{sv}")
937
682
def GetAll(self, interface_name):
938
683
"""Standard D-Bus property GetAll() method, see D-Bus
939
684
standard.
940
685
941
686
Note: Will not include properties with access="write".
942
687
"""
943
properties = {}
944
for name, prop in self._get_all_dbus_things("property"):
688
all = {}
689
for name, prop in self._get_all_dbus_properties():
945
690
if (interface_name
946
691
and interface_name != prop._dbus_interface):
947
692
# Interface non-empty but did not match
951
696
continue
952
697
value = prop()
953
698
if not hasattr(value, "variant_level"):
954
properties[name] = value
699
all[name] = value
955
700
continue
956
properties[name] = type(value)(
957
value, variant_level = value.variant_level + 1)
958
return dbus.Dictionary(properties, signature="sv")
959
960
@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
961
def PropertiesChanged(self, interface_name, changed_properties,
962
invalidated_properties):
963
"""Standard D-Bus PropertiesChanged() signal, see D-Bus
964
standard.
965
"""
966
pass
701
all[name] = type(value)(value, variant_level=
702
value.variant_level+1)
703
return dbus.Dictionary(all, signature="sv")
967
704
968
705
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
969
706
out_signature="s",
970
707
path_keyword='object_path',
971
708
connection_keyword='connection')
972
709
def Introspect(self, object_path, connection):
973
"""Overloading of standard D-Bus method.
974
975
Inserts property tags and interface annotation tags.
710
"""Standard D-Bus method, overloaded to insert property tags.
976
711
"""
977
712
xmlstring = dbus.service.Object.Introspect(self, object_path,
978
713
connection)
979
714
try:
980
715
document = xml.dom.minidom.parseString(xmlstring)
981
982
716
def make_tag(document, name, prop):
983
717
e = document.createElement("property")
984
718
e.setAttribute("name", name)
985
719
e.setAttribute("type", prop._dbus_signature)
986
720
e.setAttribute("access", prop._dbus_access)
987
721
return e
988
989
722
for if_tag in document.getElementsByTagName("interface"):
990
# Add property tags
991
723
for tag in (make_tag(document, name, prop)
992
724
for name, prop
993
in self._get_all_dbus_things("property")
725
in self._get_all_dbus_properties()
994
726
if prop._dbus_interface
995
727
== if_tag.getAttribute("name")):
996
728
if_tag.appendChild(tag)
997
# Add annotation tags
998
for typ in ("method", "signal", "property"):
999
for tag in if_tag.getElementsByTagName(typ):
1000
annots = dict()
1001
for name, prop in (self.
1002
_get_all_dbus_things(typ)):
1003
if (name == tag.getAttribute("name")
1004
and prop._dbus_interface
1005
== if_tag.getAttribute("name")):
1006
annots.update(getattr(
1007
prop, "_dbus_annotations", {}))
1008
for name, value in annots.items():
1009
ann_tag = document.createElement(
1010
"annotation")
1011
ann_tag.setAttribute("name", name)
1012
ann_tag.setAttribute("value", value)
1013
tag.appendChild(ann_tag)
1014
# Add interface annotation tags
1015
for annotation, value in dict(
1016
itertools.chain.from_iterable(
1017
annotations().items()
1018
for name, annotations
1019
in self._get_all_dbus_things("interface")
1020
if name == if_tag.getAttribute("name")
1021
)).items():
1022
ann_tag = document.createElement("annotation")
1023
ann_tag.setAttribute("name", annotation)
1024
ann_tag.setAttribute("value", value)
1025
if_tag.appendChild(ann_tag)
1026
729
# Add the names to the return values for the
1027
730
# "org.freedesktop.DBus.Properties" methods
1028
731
if (if_tag.getAttribute("name")
1043
746
except (AttributeError, xml.dom.DOMException,
1044
747
xml.parsers.expat.ExpatError) as error:
1045
748
logger.error("Failed to override Introspection method",
1046
exc_info=error)
749
error)
1047
750
return xmlstring
1048
751
1049
752
1050
def datetime_to_dbus(dt, variant_level=0):
753
def datetime_to_dbus (dt, variant_level=0):
1051
754
"""Convert a UTC datetime.datetime() to a D-Bus type."""
1052
755
if dt is None:
1053
756
return dbus.String("", variant_level = variant_level)
1054
return dbus.String(dt.isoformat(), variant_level=variant_level)
1055
1056
1057
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1058
"""A class decorator; applied to a subclass of
1059
dbus.service.Object, it will add alternate D-Bus attributes with
1060
interface names according to the "alt_interface_names" mapping.
1061
Usage:
1062
1063
@alternate_dbus_interfaces({"org.example.Interface":
1064
"net.example.AlternateInterface"})
1065
class SampleDBusObject(dbus.service.Object):
1066
@dbus.service.method("org.example.Interface")
1067
def SampleDBusMethod():
1068
pass
1069
1070
The above "SampleDBusMethod" on "SampleDBusObject" will be
1071
reachable via two interfaces: "org.example.Interface" and
1072
"net.example.AlternateInterface", the latter of which will have
1073
its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1074
"true", unless "deprecate" is passed with a False value.
1075
1076
This works for methods and signals, and also for D-Bus properties
1077
(from DBusObjectWithProperties) and interfaces (from the
1078
dbus_interface_annotations decorator).
1079
"""
1080
1081
def wrapper(cls):
1082
for orig_interface_name, alt_interface_name in (
1083
alt_interface_names.items()):
1084
attr = {}
1085
interface_names = set()
1086
# Go though all attributes of the class
1087
for attrname, attribute in inspect.getmembers(cls):
1088
# Ignore non-D-Bus attributes, and D-Bus attributes
1089
# with the wrong interface name
1090
if (not hasattr(attribute, "_dbus_interface")
1091
or not attribute._dbus_interface.startswith(
1092
orig_interface_name)):
1093
continue
1094
# Create an alternate D-Bus interface name based on
1095
# the current name
1096
alt_interface = attribute._dbus_interface.replace(
1097
orig_interface_name, alt_interface_name)
1098
interface_names.add(alt_interface)
1099
# Is this a D-Bus signal?
1100
if getattr(attribute, "_dbus_is_signal", False):
1101
# Extract the original non-method undecorated
1102
# function by black magic
1103
nonmethod_func = (dict(
1104
zip(attribute.func_code.co_freevars,
1105
attribute.__closure__))
1106
["func"].cell_contents)
1107
# Create a new, but exactly alike, function
1108
# object, and decorate it to be a new D-Bus signal
1109
# with the alternate D-Bus interface name
1110
new_function = (dbus.service.signal(
1111
alt_interface, attribute._dbus_signature)
1112
(types.FunctionType(
1113
nonmethod_func.func_code,
1114
nonmethod_func.func_globals,
1115
nonmethod_func.func_name,
1116
nonmethod_func.func_defaults,
1117
nonmethod_func.func_closure)))
1118
# Copy annotations, if any
1119
try:
1120
new_function._dbus_annotations = dict(
1121
attribute._dbus_annotations)
1122
except AttributeError:
1123
pass
1124
# Define a creator of a function to call both the
1125
# original and alternate functions, so both the
1126
# original and alternate signals gets sent when
1127
# the function is called
1128
def fixscope(func1, func2):
1129
"""This function is a scope container to pass
1130
func1 and func2 to the "call_both" function
1131
outside of its arguments"""
1132
1133
def call_both(*args, **kwargs):
1134
"""This function will emit two D-Bus
1135
signals by calling func1 and func2"""
1136
func1(*args, **kwargs)
1137
func2(*args, **kwargs)
1138
1139
return call_both
1140
# Create the "call_both" function and add it to
1141
# the class
1142
attr[attrname] = fixscope(attribute, new_function)
1143
# Is this a D-Bus method?
1144
elif getattr(attribute, "_dbus_is_method", False):
1145
# Create a new, but exactly alike, function
1146
# object. Decorate it to be a new D-Bus method
1147
# with the alternate D-Bus interface name. Add it
1148
# to the class.
1149
attr[attrname] = (
1150
dbus.service.method(
1151
alt_interface,
1152
attribute._dbus_in_signature,
1153
attribute._dbus_out_signature)
1154
(types.FunctionType(attribute.func_code,
1155
attribute.func_globals,
1156
attribute.func_name,
1157
attribute.func_defaults,
1158
attribute.func_closure)))
1159
# Copy annotations, if any
1160
try:
1161
attr[attrname]._dbus_annotations = dict(
1162
attribute._dbus_annotations)
1163
except AttributeError:
1164
pass
1165
# Is this a D-Bus property?
1166
elif getattr(attribute, "_dbus_is_property", False):
1167
# Create a new, but exactly alike, function
1168
# object, and decorate it to be a new D-Bus
1169
# property with the alternate D-Bus interface
1170
# name. Add it to the class.
1171
attr[attrname] = (dbus_service_property(
1172
alt_interface, attribute._dbus_signature,
1173
attribute._dbus_access,
1174
attribute._dbus_get_args_options
1175
["byte_arrays"])
1176
(types.FunctionType(
1177
attribute.func_code,
1178
attribute.func_globals,
1179
attribute.func_name,
1180
attribute.func_defaults,
1181
attribute.func_closure)))
1182
# Copy annotations, if any
1183
try:
1184
attr[attrname]._dbus_annotations = dict(
1185
attribute._dbus_annotations)
1186
except AttributeError:
1187
pass
1188
# Is this a D-Bus interface?
1189
elif getattr(attribute, "_dbus_is_interface", False):
1190
# Create a new, but exactly alike, function
1191
# object. Decorate it to be a new D-Bus interface
1192
# with the alternate D-Bus interface name. Add it
1193
# to the class.
1194
attr[attrname] = (
1195
dbus_interface_annotations(alt_interface)
1196
(types.FunctionType(attribute.func_code,
1197
attribute.func_globals,
1198
attribute.func_name,
1199
attribute.func_defaults,
1200
attribute.func_closure)))
1201
if deprecate:
1202
# Deprecate all alternate interfaces
1203
iname="_AlternateDBusNames_interface_annotation{}"
1204
for interface_name in interface_names:
1205
1206
@dbus_interface_annotations(interface_name)
1207
def func(self):
1208
return { "org.freedesktop.DBus.Deprecated":
1209
"true" }
1210
# Find an unused name
1211
for aname in (iname.format(i)
1212
for i in itertools.count()):
1213
if aname not in attr:
1214
attr[aname] = func
1215
break
1216
if interface_names:
1217
# Replace the class with a new subclass of it with
1218
# methods, signals, etc. as created above.
1219
cls = type(b"{}Alternate".format(cls.__name__),
1220
(cls, ), attr)
1221
return cls
1222
1223
return wrapper
1224
1225
1226
@alternate_dbus_interfaces({"se.recompile.Mandos":
1227
"se.bsnet.fukt.Mandos"})
757
return dbus.String(dt.isoformat(),
758
variant_level=variant_level)
759
1228
760
class ClientDBus(Client, DBusObjectWithProperties):
1229
761
"""A Client class using D-Bus
1230
762
1234
766
"""
1235
767
1236
768
runtime_expansions = (Client.runtime_expansions
1237
+ ("dbus_object_path", ))
1238
1239
_interface = "se.recompile.Mandos.Client"
769
+ ("dbus_object_path",))
1240
770
1241
771
# dbus.service.Object doesn't use super(), so we can't either.
1242
772
1243
773
def __init__(self, bus = None, *args, **kwargs):
774
self._approvals_pending = 0
1244
775
self.bus = bus
1245
776
Client.__init__(self, *args, **kwargs)
1246
777
# Only now, when this client is initialized, can it show up on
1247
778
# the D-Bus
1248
client_object_name = str(self.name).translate(
779
client_object_name = unicode(self.name).translate(
1249
780
{ord("."): ord("_"),
1250
781
ord("-"): ord("_")})
1251
self.dbus_object_path = dbus.ObjectPath(
1252
"/clients/" + client_object_name)
782
self.dbus_object_path = (dbus.ObjectPath
783
("/clients/" + client_object_name))
1253
784
DBusObjectWithProperties.__init__(self, self.bus,
1254
785
self.dbus_object_path)
1255
1256
def notifychangeproperty(transform_func, dbus_name,
1257
type_func=lambda x: x,
1258
variant_level=1,
1259
invalidate_only=False,
1260
_interface=_interface):
1261
""" Modify a variable so that it's a property which announces
1262
its changes to DBus.
1263
786
1264
transform_fun: Function that takes a value and a variant_level
1265
and transforms it to a D-Bus type.
1266
dbus_name: D-Bus name of the variable
787
def notifychangeproperty(transform_func,
788
dbus_name, type_func=lambda x: x,
789
variant_level=1):
790
""" Modify a variable so that its a property that announce its
791
changes to DBus.
792
transform_fun: Function that takes a value and transform it to
793
DBus type.
794
dbus_name: DBus name of the variable
1267
795
type_func: Function that transform the value before sending it
1268
to the D-Bus. Default: no transform
1269
variant_level: D-Bus variant level. Default: 1
796
to DBus
797
variant_level: DBus variant level. default: 1
1270
798
"""
1271
attrname = "_{}".format(dbus_name)
1272
799
real_value = [None,]
1273
800
def setter(self, value):
801
old_value = real_value[0]
802
real_value[0] = value
1274
803
if hasattr(self, "dbus_object_path"):
1275
if (not hasattr(self, attrname) or
1276
type_func(getattr(self, attrname, None))
1277
!= type_func(value)):
1278
if invalidate_only:
1279
self.PropertiesChanged(
1280
_interface, dbus.Dictionary(),
1281
dbus.Array((dbus_name, )))
1282
else:
1283
dbus_value = transform_func(
1284
type_func(value),
1285
variant_level = variant_level)
1286
self.PropertyChanged(dbus.String(dbus_name),
1287
dbus_value)
1288
self.PropertiesChanged(
1289
_interface,
1290
dbus.Dictionary({ dbus.String(dbus_name):
1291
dbus_value }),
1292
dbus.Array())
1293
setattr(self, attrname, value)
1294
1295
return property(lambda self: getattr(self, attrname), setter)
1296
804
if type_func(old_value) != type_func(real_value[0]):
805
dbus_value = transform_func(type_func(real_value[0]),
806
variant_level)
807
self.PropertyChanged(dbus.String(dbus_name),
808
dbus_value)
809
810
return property(lambda self: real_value[0], setter)
811
812
1297
813
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1298
814
approvals_pending = notifychangeproperty(dbus.Boolean,
1299
815
"ApprovalPending",
1301
817
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1302
818
last_enabled = notifychangeproperty(datetime_to_dbus,
1303
819
"LastEnabled")
1304
checker = notifychangeproperty(
1305
dbus.Boolean, "CheckerRunning",
1306
type_func = lambda checker: checker is not None)
820
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
821
type_func = lambda checker: checker is not None)
1307
822
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1308
823
"LastCheckedOK")
1309
last_checker_status = notifychangeproperty(dbus.Int16,
1310
"LastCheckerStatus")
1311
last_approval_request = notifychangeproperty(
1312
datetime_to_dbus, "LastApprovalRequest")
824
last_approval_request = notifychangeproperty(datetime_to_dbus,
825
"LastApprovalRequest")
1313
826
approved_by_default = notifychangeproperty(dbus.Boolean,
1314
827
"ApprovedByDefault")
1315
approval_delay = notifychangeproperty(
1316
dbus.UInt64, "ApprovalDelay",
1317
type_func = lambda td: td.total_seconds() * 1000)
1318
approval_duration = notifychangeproperty(
1319
dbus.UInt64, "ApprovalDuration",
1320
type_func = lambda td: td.total_seconds() * 1000)
828
approval_delay = notifychangeproperty(dbus.UInt16, "ApprovalDelay",
829
type_func = _timedelta_to_milliseconds)
830
approval_duration = notifychangeproperty(dbus.UInt16, "ApprovalDuration",
831
type_func = _timedelta_to_milliseconds)
1321
832
host = notifychangeproperty(dbus.String, "Host")
1322
timeout = notifychangeproperty(
1323
dbus.UInt64, "Timeout",
1324
type_func = lambda td: td.total_seconds() * 1000)
1325
extended_timeout = notifychangeproperty(
1326
dbus.UInt64, "ExtendedTimeout",
1327
type_func = lambda td: td.total_seconds() * 1000)
1328
interval = notifychangeproperty(
1329
dbus.UInt64, "Interval",
1330
type_func = lambda td: td.total_seconds() * 1000)
833
timeout = notifychangeproperty(dbus.UInt16, "Timeout",
834
type_func = _timedelta_to_milliseconds)
835
extended_timeout = notifychangeproperty(dbus.UInt16, "ExtendedTimeout",
836
type_func = _timedelta_to_milliseconds)
837
interval = notifychangeproperty(dbus.UInt16, "Interval",
838
type_func = _timedelta_to_milliseconds)
1331
839
checker_command = notifychangeproperty(dbus.String, "Checker")
1332
secret = notifychangeproperty(dbus.ByteArray, "Secret",
1333
invalidate_only=True)
1334
840
1335
841
del notifychangeproperty
1336
842
1361
867
1362
868
return Client.checker_callback(self, pid, condition, command,
1363
869
*args, **kwargs)
1364
870
1365
871
def start_checker(self, *args, **kwargs):
1366
old_checker_pid = getattr(self.checker, "pid", None)
872
old_checker = self.checker
873
if self.checker is not None:
874
old_checker_pid = self.checker.pid
875
else:
876
old_checker_pid = None
1367
877
r = Client.start_checker(self, *args, **kwargs)
1368
878
# Only if new checker process was started
1369
879
if (self.checker is not None
1373
883
return r
1374
884
1375
885
def _reset_approved(self):
1376
self.approved = None
886
self._approved = None
1377
887
return False
1378
888
1379
889
def approve(self, value=True):
1380
self.approved = value
1381
gobject.timeout_add(int(self.approval_duration.total_seconds()
1382
* 1000), self._reset_approved)
1383
890
self.send_changedstate()
891
self._approved = value
892
gobject.timeout_add(_timedelta_to_milliseconds
893
(self.approval_duration),
894
self._reset_approved)
895
1384
896
1385
897
## D-Bus methods, signals & properties
1386
1387
## Interfaces
898
_interface = "se.bsnet.fukt.Mandos.Client"
1388
899
1389
900
## Signals
1390
901
1401
912
pass
1402
913
1403
914
# PropertyChanged - signal
1404
@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1405
915
@dbus.service.signal(_interface, signature="sv")
1406
916
def PropertyChanged(self, property, value):
1407
917
"D-Bus signal"
1471
981
return dbus.Boolean(bool(self.approvals_pending))
1472
982
1473
983
# ApprovedByDefault - property
1474
@dbus_service_property(_interface,
1475
signature="b",
984
@dbus_service_property(_interface, signature="b",
1476
985
access="readwrite")
1477
986
def ApprovedByDefault_dbus_property(self, value=None):
1478
987
if value is None: # get
1480
989
self.approved_by_default = bool(value)
1481
990
1482
991
# ApprovalDelay - property
1483
@dbus_service_property(_interface,
1484
signature="t",
992
@dbus_service_property(_interface, signature="t",
1485
993
access="readwrite")
1486
994
def ApprovalDelay_dbus_property(self, value=None):
1487
995
if value is None: # get
1488
return dbus.UInt64(self.approval_delay.total_seconds()
1489
* 1000)
996
return dbus.UInt64(self.approval_delay_milliseconds())
1490
997
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1491
998
1492
999
# ApprovalDuration - property
1493
@dbus_service_property(_interface,
1494
signature="t",
1000
@dbus_service_property(_interface, signature="t",
1495
1001
access="readwrite")
1496
1002
def ApprovalDuration_dbus_property(self, value=None):
1497
1003
if value is None: # get
1498
return dbus.UInt64(self.approval_duration.total_seconds()
1499
* 1000)
1004
return dbus.UInt64(_timedelta_to_milliseconds(
1005
self.approval_duration))
1500
1006
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1501
1007
1502
1008
# Name - property
1510
1016
return dbus.String(self.fingerprint)
1511
1017
1512
1018
# Host - property
1513
@dbus_service_property(_interface,
1514
signature="s",
1019
@dbus_service_property(_interface, signature="s",
1515
1020
access="readwrite")
1516
1021
def Host_dbus_property(self, value=None):
1517
1022
if value is None: # get
1518
1023
return dbus.String(self.host)
1519
self.host = str(value)
1024
self.host = value
1520
1025
1521
1026
# Created - property
1522
1027
@dbus_service_property(_interface, signature="s", access="read")
1523
1028
def Created_dbus_property(self):
1524
return datetime_to_dbus(self.created)
1029
return dbus.String(datetime_to_dbus(self.created))
1525
1030
1526
1031
# LastEnabled - property
1527
1032
@dbus_service_property(_interface, signature="s", access="read")
1529
1034
return datetime_to_dbus(self.last_enabled)
1530
1035
1531
1036
# Enabled - property
1532
@dbus_service_property(_interface,
1533
signature="b",
1037
@dbus_service_property(_interface, signature="b",
1534
1038
access="readwrite")
1535
1039
def Enabled_dbus_property(self, value=None):
1536
1040
if value is None: # get
1541
1045
self.disable()
1542
1046
1543
1047
# LastCheckedOK - property
1544
@dbus_service_property(_interface,
1545
signature="s",
1048
@dbus_service_property(_interface, signature="s",
1546
1049
access="readwrite")
1547
1050
def LastCheckedOK_dbus_property(self, value=None):
1548
1051
if value is not None:
1550
1053
return
1551
1054
return datetime_to_dbus(self.last_checked_ok)
1552
1055
1553
# LastCheckerStatus - property
1554
@dbus_service_property(_interface, signature="n", access="read")
1555
def LastCheckerStatus_dbus_property(self):
1556
return dbus.Int16(self.last_checker_status)
1557
1558
1056
# Expires - property
1559
1057
@dbus_service_property(_interface, signature="s", access="read")
1560
1058
def Expires_dbus_property(self):
1566
1064
return datetime_to_dbus(self.last_approval_request)
1567
1065
1568
1066
# Timeout - property
1569
@dbus_service_property(_interface,
1570
signature="t",
1067
@dbus_service_property(_interface, signature="t",
1571
1068
access="readwrite")
1572
1069
def Timeout_dbus_property(self, value=None):
1573
1070
if value is None: # get
1574
return dbus.UInt64(self.timeout.total_seconds() * 1000)
1575
old_timeout = self.timeout
1071
return dbus.UInt64(self.timeout_milliseconds())
1576
1072
self.timeout = datetime.timedelta(0, 0, 0, value)
1577
# Reschedule disabling
1578
if self.enabled:
1579
now = datetime.datetime.utcnow()
1580
self.expires += self.timeout - old_timeout
1581
if self.expires <= now:
1582
# The timeout has passed
1583
self.disable()
1584
else:
1585
if (getattr(self, "disable_initiator_tag", None)
1586
is None):
1587
return
1588
gobject.source_remove(self.disable_initiator_tag)
1589
self.disable_initiator_tag = gobject.timeout_add(
1590
int((self.expires - now).total_seconds() * 1000),
1591
self.disable)
1592
1073
if getattr(self, "disable_initiator_tag", None) is None:
1074
return
1075
# Reschedule timeout
1076
gobject.source_remove(self.disable_initiator_tag)
1077
self.disable_initiator_tag = None
1078
self.expires = None
1079
time_to_die = (self.
1080
_timedelta_to_milliseconds((self
1081
.last_checked_ok
1082
+ self.timeout)
1083
- datetime.datetime
1084
.utcnow()))
1085
if time_to_die <= 0:
1086
# The timeout has passed
1087
self.disable()
1088
else:
1089
self.expires = (datetime.datetime.utcnow()
1090
+ datetime.timedelta(milliseconds = time_to_die))
1091
self.disable_initiator_tag = (gobject.timeout_add
1092
(time_to_die, self.disable))
1093
1593
1094
# ExtendedTimeout - property
1594
@dbus_service_property(_interface,
1595
signature="t",
1095
@dbus_service_property(_interface, signature="t",
1596
1096
access="readwrite")
1597
1097
def ExtendedTimeout_dbus_property(self, value=None):
1598
1098
if value is None: # get
1599
return dbus.UInt64(self.extended_timeout.total_seconds()
1600
* 1000)
1099
return dbus.UInt64(self.extended_timeout_milliseconds())
1601
1100
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1602
1101
1603
1102
# Interval - property
1604
@dbus_service_property(_interface,
1605
signature="t",
1103
@dbus_service_property(_interface, signature="t",
1606
1104
access="readwrite")
1607
1105
def Interval_dbus_property(self, value=None):
1608
1106
if value is None: # get
1609
return dbus.UInt64(self.interval.total_seconds() * 1000)
1107
return dbus.UInt64(self.interval_milliseconds())
1610
1108
self.interval = datetime.timedelta(0, 0, 0, value)
1611
1109
if getattr(self, "checker_initiator_tag", None) is None:
1612
1110
return
1613
if self.enabled:
1614
# Reschedule checker run
1615
gobject.source_remove(self.checker_initiator_tag)
1616
self.checker_initiator_tag = gobject.timeout_add(
1617
value, self.start_checker)
1618
self.start_checker() # Start one now, too
1619
1111
# Reschedule checker run
1112
gobject.source_remove(self.checker_initiator_tag)
1113
self.checker_initiator_tag = (gobject.timeout_add
1114
(value, self.start_checker))
1115
self.start_checker() # Start one now, too
1116
1620
1117
# Checker - property
1621
@dbus_service_property(_interface,
1622
signature="s",
1118
@dbus_service_property(_interface, signature="s",
1623
1119
access="readwrite")
1624
1120
def Checker_dbus_property(self, value=None):
1625
1121
if value is None: # get
1626
1122
return dbus.String(self.checker_command)
1627
self.checker_command = str(value)
1123
self.checker_command = value
1628
1124
1629
1125
# CheckerRunning - property
1630
@dbus_service_property(_interface,
1631
signature="b",
1126
@dbus_service_property(_interface, signature="b",
1632
1127
access="readwrite")
1633
1128
def CheckerRunning_dbus_property(self, value=None):
1634
1129
if value is None: # get
1644
1139
return self.dbus_object_path # is already a dbus.ObjectPath
1645
1140
1646
1141
# Secret = property
1647
@dbus_service_property(_interface,
1648
signature="ay",
1649
access="write",
1650
byte_arrays=True)
1142
@dbus_service_property(_interface, signature="ay",
1143
access="write", byte_arrays=True)
1651
1144
def Secret_dbus_property(self, value):
1652
self.secret = bytes(value)
1145
self.secret = str(value)
1653
1146
1654
1147
del _interface
1655
1148
1660
1153
self._pipe.send(('init', fpr, address))
1661
1154
if not self._pipe.recv():
1662
1155
raise KeyError()
1663
1156
1664
1157
def __getattribute__(self, name):
1665
if name == '_pipe':
1158
if(name == '_pipe'):
1666
1159
return super(ProxyClient, self).__getattribute__(name)
1667
1160
self._pipe.send(('getattr', name))
1668
1161
data = self._pipe.recv()
1669
1162
if data[0] == 'data':
1670
1163
return data[1]
1671
1164
if data[0] == 'function':
1672
1673
1165
def func(*args, **kwargs):
1674
1166
self._pipe.send(('funcall', name, args, kwargs))
1675
1167
return self._pipe.recv()[1]
1676
1677
1168
return func
1678
1169
1679
1170
def __setattr__(self, name, value):
1680
if name == '_pipe':
1171
if(name == '_pipe'):
1681
1172
return super(ProxyClient, self).__setattr__(name, value)
1682
1173
self._pipe.send(('setattr', name, value))
1683
1174
1691
1182
def handle(self):
1692
1183
with contextlib.closing(self.server.child_pipe) as child_pipe:
1693
1184
logger.info("TCP connection from: %s",
1694
str(self.client_address))
1185
unicode(self.client_address))
1695
1186
logger.debug("Pipe FD: %d",
1696
1187
self.server.child_pipe.fileno())
1697
1698
session = gnutls.connection.ClientSession(
1699
self.request, gnutls.connection .X509Credentials())
1700
1188
1189
session = (gnutls.connection
1190
.ClientSession(self.request,
1191
gnutls.connection
1192
.X509Credentials()))
1193
1701
1194
# Note: gnutls.connection.X509Credentials is really a
1702
1195
# generic GnuTLS certificate credentials object so long as
1703
1196
# no X.509 keys are added to it. Therefore, we can use it
1704
1197
# here despite using OpenPGP certificates.
1705
1198
1706
1199
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1707
1200
# "+AES-256-CBC", "+SHA1",
1708
1201
# "+COMP-NULL", "+CTYPE-OPENPGP",
1711
1204
priority = self.server.gnutls_priority
1712
1205
if priority is None:
1713
1206
priority = "NORMAL"
1714
gnutls.library.functions.gnutls_priority_set_direct(
1715
session._c_object, priority, None)
1716
1207
(gnutls.library.functions
1208
.gnutls_priority_set_direct(session._c_object,
1209
priority, None))
1210
1717
1211
# Start communication using the Mandos protocol
1718
1212
# Get protocol number
1719
1213
line = self.request.makefile().readline()
1720
1214
logger.debug("Protocol version: %r", line)
1721
1215
try:
1722
1216
if int(line.strip().split()[0]) > 1:
1723
raise RuntimeError(line)
1217
raise RuntimeError
1724
1218
except (ValueError, IndexError, RuntimeError) as error:
1725
1219
logger.error("Unknown protocol version: %s", error)
1726
1220
return
1727
1221
1728
1222
# Start GnuTLS connection
1729
1223
try:
1730
1224
session.handshake()
1734
1228
# established. Just abandon the request.
1735
1229
return
1736
1230
logger.debug("Handshake succeeded")
1737
1231
1738
1232
approval_required = False
1739
1233
try:
1740
1234
try:
1741
fpr = self.fingerprint(
1742
self.peer_certificate(session))
1235
fpr = self.fingerprint(self.peer_certificate
1236
(session))
1743
1237
except (TypeError,
1744
1238
gnutls.errors.GNUTLSError) as error:
1745
1239
logger.warning("Bad certificate: %s", error)
1746
1240
return
1747
1241
logger.debug("Fingerprint: %s", fpr)
1748
1242
1749
1243
try:
1750
1244
client = ProxyClient(child_pipe, fpr,
1751
1245
self.client_address)
1760
1254
while True:
1761
1255
if not client.enabled:
1762
1256
logger.info("Client %s is disabled",
1763
client.name)
1257
client.name)
1764
1258
if self.server.use_dbus:
1765
1259
# Emit D-Bus signal
1766
client.Rejected("Disabled")
1260
client.Rejected("Disabled")
1767
1261
return
1768
1262
1769
if client.approved or not client.approval_delay:
1263
if client._approved or not client.approval_delay:
1770
1264
#We are approved or approval is disabled
1771
1265
break
1772
elif client.approved is None:
1266
elif client._approved is None:
1773
1267
logger.info("Client %s needs approval",
1774
1268
client.name)
1775
1269
if self.server.use_dbus:
1776
1270
# Emit D-Bus signal
1777
1271
client.NeedApproval(
1778
client.approval_delay.total_seconds()
1779
* 1000, client.approved_by_default)
1272
client.approval_delay_milliseconds(),
1273
client.approved_by_default)
1780
1274
else:
1781
1275
logger.warning("Client %s was not approved",
1782
1276
client.name)
1786
1280
return
1787
1281
1788
1282
#wait until timeout or approved
1283
#x = float(client._timedelta_to_milliseconds(delay))
1789
1284
time = datetime.datetime.now()
1790
1285
client.changedstate.acquire()
1791
client.changedstate.wait(delay.total_seconds())
1286
client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))
1792
1287
client.changedstate.release()
1793
1288
time2 = datetime.datetime.now()
1794
1289
if (time2 - time) >= delay:
1810
1305
try:
1811
1306
sent = session.send(client.secret[sent_size:])
1812
1307
except gnutls.errors.GNUTLSError as error:
1813
logger.warning("gnutls send failed",
1814
exc_info=error)
1308
logger.warning("gnutls send failed")
1815
1309
return
1816
logger.debug("Sent: %d, remaining: %d", sent,
1817
len(client.secret) - (sent_size
1818
+ sent))
1310
logger.debug("Sent: %d, remaining: %d",
1311
sent, len(client.secret)
1312
- (sent_size + sent))
1819
1313
sent_size += sent
1820
1314
1821
1315
logger.info("Sending secret to %s", client.name)
1822
# bump the timeout using extended_timeout
1823
client.bump_timeout(client.extended_timeout)
1316
# bump the timeout as if seen
1317
client.checked_ok(client.extended_timeout)
1824
1318
if self.server.use_dbus:
1825
1319
# Emit D-Bus signal
1826
1320
client.GotSecret()
1831
1325
try:
1832
1326
session.bye()
1833
1327
except gnutls.errors.GNUTLSError as error:
1834
logger.warning("GnuTLS bye failed",
1835
exc_info=error)
1328
logger.warning("GnuTLS bye failed")
1836
1329
1837
1330
@staticmethod
1838
1331
def peer_certificate(session):
1839
1332
"Return the peer's OpenPGP certificate as a bytestring"
1840
1333
# If not an OpenPGP certificate...
1841
if (gnutls.library.functions.gnutls_certificate_type_get(
1842
session._c_object)
1334
if (gnutls.library.functions
1335
.gnutls_certificate_type_get(session._c_object)
1843
1336
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1844
1337
# ...do the normal thing
1845
1338
return session.peer_certificate
1859
1352
def fingerprint(openpgp):
1860
1353
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1861
1354
# New GnuTLS "datum" with the OpenPGP public key
1862
datum = gnutls.library.types.gnutls_datum_t(
1863
ctypes.cast(ctypes.c_char_p(openpgp),
1864
ctypes.POINTER(ctypes.c_ubyte)),
1865
ctypes.c_uint(len(openpgp)))
1355
datum = (gnutls.library.types
1356
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1357
ctypes.POINTER
1358
(ctypes.c_ubyte)),
1359
ctypes.c_uint(len(openpgp))))
1866
1360
# New empty GnuTLS certificate
1867
1361
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1868
gnutls.library.functions.gnutls_openpgp_crt_init(
1869
ctypes.byref(crt))
1362
(gnutls.library.functions
1363
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1870
1364
# Import the OpenPGP public key into the certificate
1871
gnutls.library.functions.gnutls_openpgp_crt_import(
1872
crt, ctypes.byref(datum),
1873
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
1365
(gnutls.library.functions
1366
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1367
gnutls.library.constants
1368
.GNUTLS_OPENPGP_FMT_RAW))
1874
1369
# Verify the self signature in the key
1875
1370
crtverify = ctypes.c_uint()
1876
gnutls.library.functions.gnutls_openpgp_crt_verify_self(
1877
crt, 0, ctypes.byref(crtverify))
1371
(gnutls.library.functions
1372
.gnutls_openpgp_crt_verify_self(crt, 0,
1373
ctypes.byref(crtverify)))
1878
1374
if crtverify.value != 0:
1879
1375
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1880
raise gnutls.errors.CertificateSecurityError(
1881
"Verify failed")
1376
raise (gnutls.errors.CertificateSecurityError
1377
("Verify failed"))
1882
1378
# New buffer for the fingerprint
1883
1379
buf = ctypes.create_string_buffer(20)
1884
1380
buf_len = ctypes.c_size_t()
1885
1381
# Get the fingerprint from the certificate into the buffer
1886
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint(
1887
crt, ctypes.byref(buf), ctypes.byref(buf_len))
1382
(gnutls.library.functions
1383
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1384
ctypes.byref(buf_len)))
1888
1385
# Deinit the certificate
1889
1386
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1890
1387
# Convert the buffer to a Python bytestring
1891
1388
fpr = ctypes.string_at(buf, buf_len.value)
1892
1389
# Convert the bytestring to hexadecimal notation
1893
hex_fpr = binascii.hexlify(fpr).upper()
1390
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
1894
1391
return hex_fpr
1895
1392
1896
1393
1897
1394
class MultiprocessingMixIn(object):
1898
1395
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1899
1900
1396
def sub_process_main(self, request, address):
1901
1397
try:
1902
1398
self.finish_request(request, address)
1903
except Exception:
1399
except:
1904
1400
self.handle_error(request, address)
1905
1401
self.close_request(request)
1906
1402
1907
1403
def process_request(self, request, address):
1908
1404
"""Start a new process to process the request."""
1909
proc = multiprocessing.Process(target = self.sub_process_main,
1910
args = (request, address))
1911
proc.start()
1912
return proc
1913
1405
multiprocessing.Process(target = self.sub_process_main,
1406
args = (request, address)).start()
1914
1407
1915
1408
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1916
1409
""" adds a pipe to the MixIn """
1917
1918
1410
def process_request(self, request, client_address):
1919
1411
"""Overrides and wraps the original process_request().
1920
1412
1921
1413
This function creates a new pipe in self.pipe
1922
1414
"""
1923
1415
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1924
1925
proc = MultiprocessingMixIn.process_request(self, request,
1926
client_address)
1416
1417
super(MultiprocessingMixInWithPipe,
1418
self).process_request(request, client_address)
1927
1419
self.child_pipe.close()
1928
self.add_pipe(parent_pipe, proc)
1929
1930
def add_pipe(self, parent_pipe, proc):
1420
self.add_pipe(parent_pipe)
1421
1422
def add_pipe(self, parent_pipe):
1931
1423
"""Dummy function; override as necessary"""
1932
raise NotImplementedError()
1933
1424
raise NotImplementedError
1934
1425
1935
1426
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1936
1427
socketserver.TCPServer, object):
1941
1432
interface: None or a network interface name (string)
1942
1433
use_ipv6: Boolean; to use IPv6 or not
1943
1434
"""
1944
1945
1435
def __init__(self, server_address, RequestHandlerClass,
1946
interface=None,
1947
use_ipv6=True,
1948
socketfd=None):
1949
"""If socketfd is set, use that file descriptor instead of
1950
creating a new one with socket.socket().
1951
"""
1436
interface=None, use_ipv6=True):
1952
1437
self.interface = interface
1953
1438
if use_ipv6:
1954
1439
self.address_family = socket.AF_INET6
1955
if socketfd is not None:
1956
# Save the file descriptor
1957
self.socketfd = socketfd
1958
# Save the original socket.socket() function
1959
self.socket_socket = socket.socket
1960
# To implement --socket, we monkey patch socket.socket.
1961
#
1962
# (When socketserver.TCPServer is a new-style class, we
1963
# could make self.socket into a property instead of monkey
1964
# patching socket.socket.)
1965
#
1966
# Create a one-time-only replacement for socket.socket()
1967
@functools.wraps(socket.socket)
1968
def socket_wrapper(*args, **kwargs):
1969
# Restore original function so subsequent calls are
1970
# not affected.
1971
socket.socket = self.socket_socket
1972
del self.socket_socket
1973
# This time only, return a new socket object from the
1974
# saved file descriptor.
1975
return socket.fromfd(self.socketfd, *args, **kwargs)
1976
# Replace socket.socket() function with wrapper
1977
socket.socket = socket_wrapper
1978
# The socketserver.TCPServer.__init__ will call
1979
# socket.socket(), which might be our replacement,
1980
# socket_wrapper(), if socketfd was set.
1981
1440
socketserver.TCPServer.__init__(self, server_address,
1982
1441
RequestHandlerClass)
1983
1984
1442
def server_bind(self):
1985
1443
"""This overrides the normal server_bind() function
1986
1444
to bind to an interface if one was specified, and also NOT to
1992
1450
self.interface)
1993
1451
else:
1994
1452
try:
1995
self.socket.setsockopt(
1996
socket.SOL_SOCKET, SO_BINDTODEVICE,
1997
(self.interface + "\0").encode("utf-8"))
1453
self.socket.setsockopt(socket.SOL_SOCKET,
1454
SO_BINDTODEVICE,
1455
str(self.interface
1456
+ '\0'))
1998
1457
except socket.error as error:
1999
if error.errno == errno.EPERM:
2000
logger.error("No permission to bind to"
2001
" interface %s", self.interface)
2002
elif error.errno == errno.ENOPROTOOPT:
1458
if error[0] == errno.EPERM:
1459
logger.error("No permission to"
1460
" bind to interface %s",
1461
self.interface)
1462
elif error[0] == errno.ENOPROTOOPT:
2003
1463
logger.error("SO_BINDTODEVICE not available;"
2004
1464
" cannot bind to interface %s",
2005
1465
self.interface)
2006
elif error.errno == errno.ENODEV:
2007
logger.error("Interface %s does not exist,"
2008
" cannot bind", self.interface)
2009
1466
else:
2010
1467
raise
2011
1468
# Only bind(2) the socket if we really need to.
2014
1471
if self.address_family == socket.AF_INET6:
2015
1472
any_address = "::" # in6addr_any
2016
1473
else:
2017
any_address = "0.0.0.0" # INADDR_ANY
1474
any_address = socket.INADDR_ANY
2018
1475
self.server_address = (any_address,
2019
1476
self.server_address[1])
2020
1477
elif not self.server_address[1]:
2021
self.server_address = (self.server_address[0], 0)
1478
self.server_address = (self.server_address[0],
1479
0)
2022
1480
# if self.interface:
2023
1481
# self.server_address = (self.server_address[0],
2024
1482
# 0, # port
2038
1496
2039
1497
Assumes a gobject.MainLoop event loop.
2040
1498
"""
2041
2042
1499
def __init__(self, server_address, RequestHandlerClass,
2043
interface=None,
2044
use_ipv6=True,
2045
clients=None,
2046
gnutls_priority=None,
2047
use_dbus=True,
2048
socketfd=None):
1500
interface=None, use_ipv6=True, clients=None,
1501
gnutls_priority=None, use_dbus=True):
2049
1502
self.enabled = False
2050
1503
self.clients = clients
2051
1504
if self.clients is None:
2052
self.clients = {}
1505
self.clients = set()
2053
1506
self.use_dbus = use_dbus
2054
1507
self.gnutls_priority = gnutls_priority
2055
1508
IPv6_TCPServer.__init__(self, server_address,
2056
1509
RequestHandlerClass,
2057
1510
interface = interface,
2058
use_ipv6 = use_ipv6,
2059
socketfd = socketfd)
2060
1511
use_ipv6 = use_ipv6)
2061
1512
def server_activate(self):
2062
1513
if self.enabled:
2063
1514
return socketserver.TCPServer.server_activate(self)
2064
2065
1515
def enable(self):
2066
1516
self.enabled = True
2067
2068
def add_pipe(self, parent_pipe, proc):
1517
def add_pipe(self, parent_pipe):
2069
1518
# Call "handle_ipc" for both data and EOF events
2070
gobject.io_add_watch(
2071
parent_pipe.fileno(),
2072
gobject.IO_IN | gobject.IO_HUP,
2073
functools.partial(self.handle_ipc,
2074
parent_pipe = parent_pipe,
2075
proc = proc))
2076
2077
def handle_ipc(self, source, condition,
2078
parent_pipe=None,
2079
proc = None,
1519
gobject.io_add_watch(parent_pipe.fileno(),
1520
gobject.IO_IN | gobject.IO_HUP,
1521
functools.partial(self.handle_ipc,
1522
parent_pipe = parent_pipe))
1523
1524
def handle_ipc(self, source, condition, parent_pipe=None,
2080
1525
client_object=None):
2081
# error, or the other end of multiprocessing.Pipe has closed
2082
if condition & (gobject.IO_ERR | gobject.IO_HUP):
2083
# Wait for other process to exit
2084
proc.join()
1526
condition_names = {
1527
gobject.IO_IN: "IN", # There is data to read.
1528
gobject.IO_OUT: "OUT", # Data can be written (without
1529
# blocking).
1530
gobject.IO_PRI: "PRI", # There is urgent data to read.
1531
gobject.IO_ERR: "ERR", # Error condition.
1532
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1533
# broken, usually for pipes and
1534
# sockets).
1535
}
1536
conditions_string = ' | '.join(name
1537
for cond, name in
1538
condition_names.iteritems()
1539
if cond & condition)
1540
# error or the other end of multiprocessing.Pipe has closed
1541
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
2085
1542
return False
2086
1543
2087
1544
# Read a request from the child
2092
1549
fpr = request[1]
2093
1550
address = request[2]
2094
1551
2095
for c in self.clients.itervalues():
1552
for c in self.clients:
2096
1553
if c.fingerprint == fpr:
2097
1554
client = c
2098
1555
break
2101
1558
"dress: %s", fpr, address)
2102
1559
if self.use_dbus:
2103
1560
# Emit D-Bus signal
2104
mandos_dbus_service.ClientNotFound(fpr,
2105
address[0])
1561
mandos_dbus_service.ClientNotFound(fpr, address[0])
2106
1562
parent_pipe.send(False)
2107
1563
return False
2108
1564
2109
gobject.io_add_watch(
2110
parent_pipe.fileno(),
2111
gobject.IO_IN | gobject.IO_HUP,
2112
functools.partial(self.handle_ipc,
2113
parent_pipe = parent_pipe,
2114
proc = proc,
2115
client_object = client))
1565
gobject.io_add_watch(parent_pipe.fileno(),
1566
gobject.IO_IN | gobject.IO_HUP,
1567
functools.partial(self.handle_ipc,
1568
parent_pipe = parent_pipe,
1569
client_object = client))
2116
1570
parent_pipe.send(True)
2117
# remove the old hook in favor of the new above hook on
2118
# same fileno
1571
# remove the old hook in favor of the new above hook on same fileno
2119
1572
return False
2120
1573
if command == 'funcall':
2121
1574
funcname = request[1]
2122
1575
args = request[2]
2123
1576
kwargs = request[3]
2124
1577
2125
parent_pipe.send(('data', getattr(client_object,
2126
funcname)(*args,
2127
**kwargs)))
2128
1578
parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))
1579
2129
1580
if command == 'getattr':
2130
1581
attrname = request[1]
2131
1582
if callable(client_object.__getattribute__(attrname)):
2132
parent_pipe.send(('function', ))
1583
parent_pipe.send(('function',))
2133
1584
else:
2134
parent_pipe.send((
2135
'data', client_object.__getattribute__(attrname)))
1585
parent_pipe.send(('data', client_object.__getattribute__(attrname)))
2136
1586
2137
1587
if command == 'setattr':
2138
1588
attrname = request[1]
2139
1589
value = request[2]
2140
1590
setattr(client_object, attrname, value)
2141
1591
2142
1592
return True
2143
1593
2144
1594
2145
def rfc3339_duration_to_delta(duration):
2146
"""Parse an RFC 3339 "duration" and return a datetime.timedelta
2147
2148
>>> rfc3339_duration_to_delta("P7D")
2149
datetime.timedelta(7)
2150
>>> rfc3339_duration_to_delta("PT60S")
2151
datetime.timedelta(0, 60)
2152
>>> rfc3339_duration_to_delta("PT60M")
2153
datetime.timedelta(0, 3600)
2154
>>> rfc3339_duration_to_delta("PT24H")
2155
datetime.timedelta(1)
2156
>>> rfc3339_duration_to_delta("P1W")
2157
datetime.timedelta(7)
2158
>>> rfc3339_duration_to_delta("PT5M30S")
2159
datetime.timedelta(0, 330)
2160
>>> rfc3339_duration_to_delta("P1DT3M20S")
2161
datetime.timedelta(1, 200)
2162
"""
2163
2164
# Parsing an RFC 3339 duration with regular expressions is not
2165
# possible - there would have to be multiple places for the same
2166
# values, like seconds. The current code, while more esoteric, is
2167
# cleaner without depending on a parsing library. If Python had a
2168
# built-in library for parsing we would use it, but we'd like to
2169
# avoid excessive use of external libraries.
2170
2171
# New type for defining tokens, syntax, and semantics all-in-one
2172
Token = collections.namedtuple("Token",
2173
("regexp", # To match token; if
2174
# "value" is not None,
2175
# must have a "group"
2176
# containing digits
2177
"value", # datetime.timedelta or
2178
# None
2179
"followers")) # Tokens valid after
2180
# this token
2181
Token = collections.namedtuple("Token", (
2182
"regexp", # To match token; if "value" is not None, must have
2183
# a "group" containing digits
2184
"value", # datetime.timedelta or None
2185
"followers")) # Tokens valid after this token
2186
# RFC 3339 "duration" tokens, syntax, and semantics; taken from
2187
# the "duration" ABNF definition in RFC 3339, Appendix A.
2188
token_end = Token(re.compile(r"$"), None, frozenset())
2189
token_second = Token(re.compile(r"(\d+)S"),
2190
datetime.timedelta(seconds=1),
2191
frozenset((token_end, )))
2192
token_minute = Token(re.compile(r"(\d+)M"),
2193
datetime.timedelta(minutes=1),
2194
frozenset((token_second, token_end)))
2195
token_hour = Token(re.compile(r"(\d+)H"),
2196
datetime.timedelta(hours=1),
2197
frozenset((token_minute, token_end)))
2198
token_time = Token(re.compile(r"T"),
2199
None,
2200
frozenset((token_hour, token_minute,
2201
token_second)))
2202
token_day = Token(re.compile(r"(\d+)D"),
2203
datetime.timedelta(days=1),
2204
frozenset((token_time, token_end)))
2205
token_month = Token(re.compile(r"(\d+)M"),
2206
datetime.timedelta(weeks=4),
2207
frozenset((token_day, token_end)))
2208
token_year = Token(re.compile(r"(\d+)Y"),
2209
datetime.timedelta(weeks=52),
2210
frozenset((token_month, token_end)))
2211
token_week = Token(re.compile(r"(\d+)W"),
2212
datetime.timedelta(weeks=1),
2213
frozenset((token_end, )))
2214
token_duration = Token(re.compile(r"P"), None,
2215
frozenset((token_year, token_month,
2216
token_day, token_time,
2217
token_week)))
2218
# Define starting values
2219
value = datetime.timedelta() # Value so far
2220
found_token = None
2221
followers = frozenset((token_duration,)) # Following valid tokens
2222
s = duration # String left to parse
2223
# Loop until end token is found
2224
while found_token is not token_end:
2225
# Search for any currently valid tokens
2226
for token in followers:
2227
match = token.regexp.match(s)
2228
if match is not None:
2229
# Token found
2230
if token.value is not None:
2231
# Value found, parse digits
2232
factor = int(match.group(1), 10)
2233
# Add to value so far
2234
value += factor * token.value
2235
# Strip token from string
2236
s = token.regexp.sub("", s, 1)
2237
# Go to found token
2238
found_token = token
2239
# Set valid next tokens
2240
followers = found_token.followers
2241
break
2242
else:
2243
# No currently valid tokens were found
2244
raise ValueError("Invalid RFC 3339 duration")
2245
# End token found
2246
return value
2247
2248
2249
1595
def string_to_delta(interval):
2250
1596
"""Parse a string and return a datetime.timedelta
2251
1597
2262
1608
>>> string_to_delta('5m 30s')
2263
1609
datetime.timedelta(0, 330)
2264
1610
"""
2265
2266
try:
2267
return rfc3339_duration_to_delta(interval)
2268
except ValueError:
2269
pass
2270
2271
1611
timevalue = datetime.timedelta(0)
2272
1612
for s in interval.split():
2273
1613
try:
2274
suffix = s[-1]
1614
suffix = unicode(s[-1])
2275
1615
value = int(s[:-1])
2276
1616
if suffix == "d":
2277
1617
delta = datetime.timedelta(value)
2284
1624
elif suffix == "w":
2285
1625
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
2286
1626
else:
2287
raise ValueError("Unknown suffix {!r}".format(suffix))
2288
except IndexError as e:
1627
raise ValueError("Unknown suffix %r" % suffix)
1628
except (ValueError, IndexError) as e:
2289
1629
raise ValueError(*(e.args))
2290
1630
timevalue += delta
2291
1631
return timevalue
2292
1632
2293
1633
1634
def if_nametoindex(interface):
1635
"""Call the C function if_nametoindex(), or equivalent
1636
1637
Note: This function cannot accept a unicode string."""
1638
global if_nametoindex
1639
try:
1640
if_nametoindex = (ctypes.cdll.LoadLibrary
1641
(ctypes.util.find_library("c"))
1642
.if_nametoindex)
1643
except (OSError, AttributeError):
1644
logger.warning("Doing if_nametoindex the hard way")
1645
def if_nametoindex(interface):
1646
"Get an interface index the hard way, i.e. using fcntl()"
1647
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1648
with contextlib.closing(socket.socket()) as s:
1649
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1650
struct.pack(str("16s16x"),
1651
interface))
1652
interface_index = struct.unpack(str("I"),
1653
ifreq[16:20])[0]
1654
return interface_index
1655
return if_nametoindex(interface)
1656
1657
2294
1658
def daemon(nochdir = False, noclose = False):
2295
1659
"""See daemon(3). Standard BSD Unix function.
2296
1660
2304
1668
sys.exit()
2305
1669
if not noclose:
2306
1670
# Close all standard open file descriptors
2307
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1671
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2308
1672
if not stat.S_ISCHR(os.fstat(null).st_mode):
2309
1673
raise OSError(errno.ENODEV,
2310
"{} not a character device"
2311
.format(os.devnull))
1674
"%s not a character device"
1675
% os.path.devnull)
2312
1676
os.dup2(null, sys.stdin.fileno())
2313
1677
os.dup2(null, sys.stdout.fileno())
2314
1678
os.dup2(null, sys.stderr.fileno())
2323
1687
2324
1688
parser = argparse.ArgumentParser()
2325
1689
parser.add_argument("-v", "--version", action="version",
2326
version = "%(prog)s {}".format(version),
1690
version = "%%(prog)s %s" % version,
2327
1691
help="show version number and exit")
2328
1692
parser.add_argument("-i", "--interface", metavar="IF",
2329
1693
help="Bind to interface IF")
2335
1699
help="Run self-test")
2336
1700
parser.add_argument("--debug", action="store_true",
2337
1701
help="Debug mode; run in foreground and log"
2338
" to terminal", default=None)
1702
" to terminal")
2339
1703
parser.add_argument("--debuglevel", metavar="LEVEL",
2340
1704
help="Debug level for stdout output")
2341
1705
parser.add_argument("--priority", help="GnuTLS"
2348
1712
" files")
2349
1713
parser.add_argument("--no-dbus", action="store_false",
2350
1714
dest="use_dbus", help="Do not provide D-Bus"
2351
" system bus interface", default=None)
1715
" system bus interface")
2352
1716
parser.add_argument("--no-ipv6", action="store_false",
2353
dest="use_ipv6", help="Do not use IPv6",
2354
default=None)
2355
parser.add_argument("--no-restore", action="store_false",
2356
dest="restore", help="Do not restore stored"
2357
" state", default=None)
2358
parser.add_argument("--socket", type=int,
2359
help="Specify a file descriptor to a network"
2360
" socket to use instead of creating one")
2361
parser.add_argument("--statedir", metavar="DIR",
2362
help="Directory to save/restore state in")
2363
parser.add_argument("--foreground", action="store_true",
2364
help="Run in foreground", default=None)
2365
parser.add_argument("--no-zeroconf", action="store_false",
2366
dest="zeroconf", help="Do not use Zeroconf",
2367
default=None)
2368
1717
dest="use_ipv6", help="Do not use IPv6")
2369
1718
options = parser.parse_args()
2370
1719
2371
1720
if options.check:
2372
1721
import doctest
2373
fail_count, test_count = doctest.testmod()
2374
sys.exit(os.EX_OK if fail_count == 0 else 1)
1722
doctest.testmod()
1723
sys.exit()
2375
1724
2376
1725
# Default values for config file for server-global settings
2377
1726
server_defaults = { "interface": "",
2379
1728
"port": "",
2380
1729
"debug": "False",
2381
1730
"priority":
2382
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2383
":+SIGN-RSA-SHA224:+SIGN-RSA-RMD160",
1731
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2384
1732
"servicename": "Mandos",
2385
1733
"use_dbus": "True",
2386
1734
"use_ipv6": "True",
2387
1735
"debuglevel": "",
2388
"restore": "True",
2389
"socket": "",
2390
"statedir": "/var/lib/mandos",
2391
"foreground": "False",
2392
"zeroconf": "True",
2393
}
1736
}
2394
1737
2395
1738
# Parse config file for server-global settings
2396
1739
server_config = configparser.SafeConfigParser(server_defaults)
2397
1740
del server_defaults
2398
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1741
server_config.read(os.path.join(options.configdir,
1742
"mandos.conf"))
2399
1743
# Convert the SafeConfigParser object to a dict
2400
1744
server_settings = server_config.defaults()
2401
1745
# Use the appropriate methods on the non-string config options
2402
for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
1746
for option in ("debug", "use_dbus", "use_ipv6"):
2403
1747
server_settings[option] = server_config.getboolean("DEFAULT",
2404
1748
option)
2405
1749
if server_settings["port"]:
2406
1750
server_settings["port"] = server_config.getint("DEFAULT",
2407
1751
"port")
2408
if server_settings["socket"]:
2409
server_settings["socket"] = server_config.getint("DEFAULT",
2410
"socket")
2411
# Later, stdin will, and stdout and stderr might, be dup'ed
2412
# over with an opened os.devnull. But we don't want this to
2413
# happen with a supplied network socket.
2414
if 0 <= server_settings["socket"] <= 2:
2415
server_settings["socket"] = os.dup(server_settings
2416
["socket"])
2417
1752
del server_config
2418
1753
2419
1754
# Override the settings from the config file with command line
2420
1755
# options, if set.
2421
1756
for option in ("interface", "address", "port", "debug",
2422
"priority", "servicename", "configdir", "use_dbus",
2423
"use_ipv6", "debuglevel", "restore", "statedir",
2424
"socket", "foreground", "zeroconf"):
1757
"priority", "servicename", "configdir",
1758
"use_dbus", "use_ipv6", "debuglevel"):
2425
1759
value = getattr(options, option)
2426
1760
if value is not None:
2427
1761
server_settings[option] = value
2428
1762
del options
2429
1763
# Force all strings to be unicode
2430
1764
for option in server_settings.keys():
2431
if isinstance(server_settings[option], bytes):
2432
server_settings[option] = (server_settings[option]
2433
.decode("utf-8"))
2434
# Force all boolean options to be boolean
2435
for option in ("debug", "use_dbus", "use_ipv6", "restore",
2436
"foreground", "zeroconf"):
2437
server_settings[option] = bool(server_settings[option])
2438
# Debug implies foreground
2439
if server_settings["debug"]:
2440
server_settings["foreground"] = True
1765
if type(server_settings[option]) is str:
1766
server_settings[option] = unicode(server_settings[option])
2441
1767
# Now we have our good server settings in "server_settings"
2442
1768
2443
1769
##################################################################
2444
1770
2445
if (not server_settings["zeroconf"]
2446
and not (server_settings["port"]
2447
or server_settings["socket"] != "")):
2448
parser.error("Needs port or socket to work without Zeroconf")
2449
2450
1771
# For convenience
2451
1772
debug = server_settings["debug"]
2452
1773
debuglevel = server_settings["debuglevel"]
2453
1774
use_dbus = server_settings["use_dbus"]
2454
1775
use_ipv6 = server_settings["use_ipv6"]
2455
stored_state_path = os.path.join(server_settings["statedir"],
2456
stored_state_file)
2457
foreground = server_settings["foreground"]
2458
zeroconf = server_settings["zeroconf"]
2459
2460
if debug:
2461
initlogger(debug, logging.DEBUG)
2462
else:
2463
if not debuglevel:
2464
initlogger(debug)
2465
else:
2466
level = getattr(logging, debuglevel.upper())
2467
initlogger(debug, level)
2468
1776
2469
1777
if server_settings["servicename"] != "Mandos":
2470
syslogger.setFormatter(
2471
logging.Formatter('Mandos ({}) [%(process)d]:'
2472
' %(levelname)s: %(message)s'.format(
2473
server_settings["servicename"])))
1778
syslogger.setFormatter(logging.Formatter
1779
('Mandos (%s) [%%(process)d]:'
1780
' %%(levelname)s: %%(message)s'
1781
% server_settings["servicename"]))
2474
1782
2475
1783
# Parse config file with clients
2476
client_config = configparser.SafeConfigParser(Client
2477
.client_defaults)
1784
client_defaults = { "timeout": "5m",
1785
"extended_timeout": "15m",
1786
"interval": "2m",
1787
"checker": "fping -q -- %%(host)s",
1788
"host": "",
1789
"approval_delay": "0s",
1790
"approval_duration": "1s",
1791
}
1792
client_config = configparser.SafeConfigParser(client_defaults)
2478
1793
client_config.read(os.path.join(server_settings["configdir"],
2479
1794
"clients.conf"))
2480
1795
2481
1796
global mandos_dbus_service
2482
1797
mandos_dbus_service = None
2483
1798
2484
socketfd = None
2485
if server_settings["socket"] != "":
2486
socketfd = server_settings["socket"]
2487
tcp_server = MandosServer(
2488
(server_settings["address"], server_settings["port"]),
2489
ClientHandler,
2490
interface=(server_settings["interface"] or None),
2491
use_ipv6=use_ipv6,
2492
gnutls_priority=server_settings["priority"],
2493
use_dbus=use_dbus,
2494
socketfd=socketfd)
2495
if not foreground:
2496
pidfilename = "/run/mandos.pid"
2497
if not os.path.isdir("/run/."):
2498
pidfilename = "/var/run/mandos.pid"
2499
pidfile = None
1799
tcp_server = MandosServer((server_settings["address"],
1800
server_settings["port"]),
1801
ClientHandler,
1802
interface=(server_settings["interface"]
1803
or None),
1804
use_ipv6=use_ipv6,
1805
gnutls_priority=
1806
server_settings["priority"],
1807
use_dbus=use_dbus)
1808
if not debug:
1809
pidfilename = "/var/run/mandos.pid"
2500
1810
try:
2501
1811
pidfile = open(pidfilename, "w")
2502
except IOError as e:
2503
logger.error("Could not open file %r", pidfilename,
2504
exc_info=e)
1812
except IOError:
1813
logger.error("Could not open file %r", pidfilename)
2505
1814
2506
for name in ("_mandos", "mandos", "nobody"):
1815
try:
1816
uid = pwd.getpwnam("_mandos").pw_uid
1817
gid = pwd.getpwnam("_mandos").pw_gid
1818
except KeyError:
2507
1819
try:
2508
uid = pwd.getpwnam(name).pw_uid
2509
gid = pwd.getpwnam(name).pw_gid
2510
break
1820
uid = pwd.getpwnam("mandos").pw_uid
1821
gid = pwd.getpwnam("mandos").pw_gid
2511
1822
except KeyError:
2512
continue
2513
else:
2514
uid = 65534
2515
gid = 65534
1823
try:
1824
uid = pwd.getpwnam("nobody").pw_uid
1825
gid = pwd.getpwnam("nobody").pw_gid
1826
except KeyError:
1827
uid = 65534
1828
gid = 65534
2516
1829
try:
2517
1830
os.setgid(gid)
2518
1831
os.setuid(uid)
2519
1832
except OSError as error:
2520
if error.errno != errno.EPERM:
2521
raise
1833
if error[0] != errno.EPERM:
1834
raise error
2522
1835
1836
if not debug and not debuglevel:
1837
syslogger.setLevel(logging.WARNING)
1838
console.setLevel(logging.WARNING)
1839
if debuglevel:
1840
level = getattr(logging, debuglevel.upper())
1841
syslogger.setLevel(level)
1842
console.setLevel(level)
1843
2523
1844
if debug:
2524
1845
# Enable all possible GnuTLS debugging
2525
1846
2531
1852
def debug_gnutls(level, string):
2532
1853
logger.debug("GnuTLS: %s", string[:-1])
2533
1854
2534
gnutls.library.functions.gnutls_global_set_log_function(
2535
debug_gnutls)
1855
(gnutls.library.functions
1856
.gnutls_global_set_log_function(debug_gnutls))
2536
1857
2537
1858
# Redirect stdin so all checkers get /dev/null
2538
null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1859
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2539
1860
os.dup2(null, sys.stdin.fileno())
2540
1861
if null > 2:
2541
1862
os.close(null)
1863
else:
1864
# No console logging
1865
logger.removeHandler(console)
2542
1866
2543
1867
# Need to fork before connecting to D-Bus
2544
if not foreground:
1868
if not debug:
2545
1869
# Close all input and output, do double fork, etc.
2546
1870
daemon()
2547
1871
2548
# multiprocessing will use threads, so before we use gobject we
2549
# need to inform gobject that threads will be used.
2550
gobject.threads_init()
2551
2552
1872
global main_loop
2553
1873
# From the Avahi example code
2554
DBusGMainLoop(set_as_default=True)
1874
DBusGMainLoop(set_as_default=True )
2555
1875
main_loop = gobject.MainLoop()
2556
1876
bus = dbus.SystemBus()
2557
1877
# End of Avahi example code
2558
1878
if use_dbus:
2559
1879
try:
2560
bus_name = dbus.service.BusName("se.recompile.Mandos",
2561
bus,
2562
do_not_queue=True)
2563
old_bus_name = dbus.service.BusName(
2564
"se.bsnet.fukt.Mandos", bus,
2565
do_not_queue=True)
1880
bus_name = dbus.service.BusName("se.bsnet.fukt.Mandos",
1881
bus, do_not_queue=True)
2566
1882
except dbus.exceptions.NameExistsException as e:
2567
logger.error("Disabling D-Bus:", exc_info=e)
1883
logger.error(unicode(e) + ", disabling D-Bus")
2568
1884
use_dbus = False
2569
1885
server_settings["use_dbus"] = False
2570
1886
tcp_server.use_dbus = False
2571
if zeroconf:
2572
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2573
service = AvahiServiceToSyslog(
2574
name = server_settings["servicename"],
2575
servicetype = "_mandos._tcp",
2576
protocol = protocol,
2577
bus = bus)
2578
if server_settings["interface"]:
2579
service.interface = if_nametoindex(
2580
server_settings["interface"].encode("utf-8"))
1887
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1888
service = AvahiService(name = server_settings["servicename"],
1889
servicetype = "_mandos._tcp",
1890
protocol = protocol, bus = bus)
1891
if server_settings["interface"]:
1892
service.interface = (if_nametoindex
1893
(str(server_settings["interface"])))
2581
1894
2582
1895
global multiprocessing_manager
2583
1896
multiprocessing_manager = multiprocessing.Manager()
2585
1898
client_class = Client
2586
1899
if use_dbus:
2587
1900
client_class = functools.partial(ClientDBus, bus = bus)
2588
2589
client_settings = Client.config_parser(client_config)
2590
old_client_settings = {}
2591
clients_data = {}
2592
2593
# This is used to redirect stdout and stderr for checker processes
2594
global wnull
2595
wnull = open(os.devnull, "w") # A writable /dev/null
2596
# Only used if server is running in foreground but not in debug
2597
# mode
2598
if debug or not foreground:
2599
wnull.close()
2600
2601
# Get client data and settings from last running state.
2602
if server_settings["restore"]:
2603
try:
2604
with open(stored_state_path, "rb") as stored_state:
2605
clients_data, old_client_settings = pickle.load(
2606
stored_state)
2607
os.remove(stored_state_path)
2608
except IOError as e:
2609
if e.errno == errno.ENOENT:
2610
logger.warning("Could not load persistent state:"
2611
" {}".format(os.strerror(e.errno)))
2612
else:
2613
logger.critical("Could not load persistent state:",
2614
exc_info=e)
2615
raise
2616
except EOFError as e:
2617
logger.warning("Could not load persistent state: "
2618
"EOFError:",
2619
exc_info=e)
2620
2621
with PGPEngine() as pgp:
2622
for client_name, client in clients_data.items():
2623
# Skip removed clients
2624
if client_name not in client_settings:
2625
continue
2626
2627
# Decide which value to use after restoring saved state.
2628
# We have three different values: Old config file,
2629
# new config file, and saved state.
2630
# New config value takes precedence if it differs from old
2631
# config value, otherwise use saved state.
2632
for name, value in client_settings[client_name].items():
2633
try:
2634
# For each value in new config, check if it
2635
# differs from the old config value (Except for
2636
# the "secret" attribute)
2637
if (name != "secret"
2638
and (value !=
2639
old_client_settings[client_name][name])):
2640
client[name] = value
2641
except KeyError:
2642
pass
2643
2644
# Clients who has passed its expire date can still be
2645
# enabled if its last checker was successful. Clients
2646
# whose checker succeeded before we stored its state is
2647
# assumed to have successfully run all checkers during
2648
# downtime.
2649
if client["enabled"]:
2650
if datetime.datetime.utcnow() >= client["expires"]:
2651
if not client["last_checked_ok"]:
2652
logger.warning(
2653
"disabling client {} - Client never "
2654
"performed a successful checker".format(
2655
client_name))
2656
client["enabled"] = False
2657
elif client["last_checker_status"] != 0:
2658
logger.warning(
2659
"disabling client {} - Client last"
2660
" checker failed with error code"
2661
" {}".format(
2662
client_name,
2663
client["last_checker_status"]))
2664
client["enabled"] = False
2665
else:
2666
client["expires"] = (
2667
datetime.datetime.utcnow()
2668
+ client["timeout"])
2669
logger.debug("Last checker succeeded,"
2670
" keeping {} enabled".format(
2671
client_name))
1901
def client_config_items(config, section):
1902
special_settings = {
1903
"approved_by_default":
1904
lambda: config.getboolean(section,
1905
"approved_by_default"),
1906
}
1907
for name, value in config.items(section):
2672
1908
try:
2673
client["secret"] = pgp.decrypt(
2674
client["encrypted_secret"],
2675
client_settings[client_name]["secret"])
2676
except PGPError:
2677
# If decryption fails, we use secret from new settings
2678
logger.debug("Failed to decrypt {} old secret".format(
2679
client_name))
2680
client["secret"] = (client_settings[client_name]
2681
["secret"])
2682
2683
# Add/remove clients based on new changes made to config
2684
for client_name in (set(old_client_settings)
2685
- set(client_settings)):
2686
del clients_data[client_name]
2687
for client_name in (set(client_settings)
2688
- set(old_client_settings)):
2689
clients_data[client_name] = client_settings[client_name]
2690
2691
# Create all client objects
2692
for client_name, client in clients_data.items():
2693
tcp_server.clients[client_name] = client_class(
2694
name = client_name,
2695
settings = client,
2696
server_settings = server_settings)
2697
1909
yield (name, special_settings[name]())
1910
except KeyError:
1911
yield (name, value)
1912
1913
tcp_server.clients.update(set(
1914
client_class(name = section,
1915
config= dict(client_config_items(
1916
client_config, section)))
1917
for section in client_config.sections()))
2698
1918
if not tcp_server.clients:
2699
1919
logger.warning("No clients defined")
2700
2701
if not foreground:
2702
if pidfile is not None:
2703
try:
2704
with pidfile:
2705
pid = os.getpid()
2706
pidfile.write("{}\n".format(pid).encode("utf-8"))
2707
except IOError:
2708
logger.error("Could not write to file %r with PID %d",
2709
pidfilename, pid)
2710
del pidfile
1920
1921
if not debug:
1922
try:
1923
with pidfile:
1924
pid = os.getpid()
1925
pidfile.write(str(pid) + "\n".encode("utf-8"))
1926
del pidfile
1927
except IOError:
1928
logger.error("Could not write to file %r with PID %d",
1929
pidfilename, pid)
1930
except NameError:
1931
# "pidfile" was never created
1932
pass
2711
1933
del pidfilename
2712
1934
1935
signal.signal(signal.SIGINT, signal.SIG_IGN)
1936
2713
1937
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2714
1938
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2715
1939
2716
1940
if use_dbus:
2717
2718
@alternate_dbus_interfaces(
2719
{ "se.recompile.Mandos": "se.bsnet.fukt.Mandos" })
2720
class MandosDBusService(DBusObjectWithProperties):
1941
class MandosDBusService(dbus.service.Object):
2721
1942
"""A D-Bus proxy object"""
2722
2723
1943
def __init__(self):
2724
1944
dbus.service.Object.__init__(self, bus, "/")
2725
2726
_interface = "se.recompile.Mandos"
2727
2728
@dbus_interface_annotations(_interface)
2729
def _foo(self):
2730
return {
2731
"org.freedesktop.DBus.Property.EmitsChangedSignal":
2732
"false" }
1945
_interface = "se.bsnet.fukt.Mandos"
2733
1946
2734
1947
@dbus.service.signal(_interface, signature="o")
2735
1948
def ClientAdded(self, objpath):
2749
1962
@dbus.service.method(_interface, out_signature="ao")
2750
1963
def GetAllClients(self):
2751
1964
"D-Bus method"
2752
return dbus.Array(c.dbus_object_path for c in
2753
tcp_server.clients.itervalues())
1965
return dbus.Array(c.dbus_object_path
1966
for c in tcp_server.clients)
2754
1967
2755
1968
@dbus.service.method(_interface,
2756
1969
out_signature="a{oa{sv}}")
2757
1970
def GetAllClientsWithProperties(self):
2758
1971
"D-Bus method"
2759
1972
return dbus.Dictionary(
2760
{ c.dbus_object_path: c.GetAll("")
2761
for c in tcp_server.clients.itervalues() },
1973
((c.dbus_object_path, c.GetAll(""))
1974
for c in tcp_server.clients),
2762
1975
signature="oa{sv}")
2763
1976
2764
1977
@dbus.service.method(_interface, in_signature="o")
2765
1978
def RemoveClient(self, object_path):
2766
1979
"D-Bus method"
2767
for c in tcp_server.clients.itervalues():
1980
for c in tcp_server.clients:
2768
1981
if c.dbus_object_path == object_path:
2769
del tcp_server.clients[c.name]
1982
tcp_server.clients.remove(c)
2770
1983
c.remove_from_connection()
2771
1984
# Don't signal anything except ClientRemoved
2772
1985
c.disable(quiet=True)
2781
1994
2782
1995
def cleanup():
2783
1996
"Cleanup function; run on exit"
2784
if zeroconf:
2785
service.cleanup()
2786
2787
multiprocessing.active_children()
2788
wnull.close()
2789
if not (tcp_server.clients or client_settings):
2790
return
2791
2792
# Store client before exiting. Secrets are encrypted with key
2793
# based on what config file has. If config file is
2794
# removed/edited, old secret will thus be unrecovable.
2795
clients = {}
2796
with PGPEngine() as pgp:
2797
for client in tcp_server.clients.itervalues():
2798
key = client_settings[client.name]["secret"]
2799
client.encrypted_secret = pgp.encrypt(client.secret,
2800
key)
2801
client_dict = {}
2802
2803
# A list of attributes that can not be pickled
2804
# + secret.
2805
exclude = { "bus", "changedstate", "secret",
2806
"checker", "server_settings" }
2807
for name, typ in inspect.getmembers(dbus.service
2808
.Object):
2809
exclude.add(name)
2810
2811
client_dict["encrypted_secret"] = (client
2812
.encrypted_secret)
2813
for attr in client.client_structure:
2814
if attr not in exclude:
2815
client_dict[attr] = getattr(client, attr)
2816
2817
clients[client.name] = client_dict
2818
del client_settings[client.name]["secret"]
2819
2820
try:
2821
with tempfile.NamedTemporaryFile(
2822
mode='wb',
2823
suffix=".pickle",
2824
prefix='clients-',
2825
dir=os.path.dirname(stored_state_path),
2826
delete=False) as stored_state:
2827
pickle.dump((clients, client_settings), stored_state)
2828
tempname = stored_state.name
2829
os.rename(tempname, stored_state_path)
2830
except (IOError, OSError) as e:
2831
if not debug:
2832
try:
2833
os.remove(tempname)
2834
except NameError:
2835
pass
2836
if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
2837
logger.warning("Could not save persistent state: {}"
2838
.format(os.strerror(e.errno)))
2839
else:
2840
logger.warning("Could not save persistent state:",
2841
exc_info=e)
2842
raise
2843
2844
# Delete all clients, and settings from config
1997
service.cleanup()
1998
2845
1999
while tcp_server.clients:
2846
name, client = tcp_server.clients.popitem()
2000
client = tcp_server.clients.pop()
2847
2001
if use_dbus:
2848
2002
client.remove_from_connection()
2003
client.disable_hook = None
2849
2004
# Don't signal anything except ClientRemoved
2850
2005
client.disable(quiet=True)
2851
2006
if use_dbus:
2852
2007
# Emit D-Bus signal
2853
mandos_dbus_service.ClientRemoved(
2854
client.dbus_object_path, client.name)
2855
client_settings.clear()
2008
mandos_dbus_service.ClientRemoved(client.dbus_object_path,
2009
client.name)
2856
2010
2857
2011
atexit.register(cleanup)
2858
2012
2859
for client in tcp_server.clients.itervalues():
2013
for client in tcp_server.clients:
2860
2014
if use_dbus:
2861
2015
# Emit D-Bus signal
2862
2016
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2863
# Need to initiate checking of clients
2864
if client.enabled:
2865
client.init_checker()
2017
client.enable()
2866
2018
2867
2019
tcp_server.enable()
2868
2020
tcp_server.server_activate()
2869
2021
2870
2022
# Find out what port we got
2871
if zeroconf:
2872
service.port = tcp_server.socket.getsockname()[1]
2023
service.port = tcp_server.socket.getsockname()[1]
2873
2024
if use_ipv6:
2874
2025
logger.info("Now listening on address %r, port %d,"
2875
" flowinfo %d, scope_id %d",
2876
*tcp_server.socket.getsockname())
2026
" flowinfo %d, scope_id %d"
2027
% tcp_server.socket.getsockname())
2877
2028
else: # IPv4
2878
logger.info("Now listening on address %r, port %d",
2879
*tcp_server.socket.getsockname())
2029
logger.info("Now listening on address %r, port %d"
2030
% tcp_server.socket.getsockname())
2880
2031
2881
2032
#service.interface = tcp_server.socket.getsockname()[3]
2882
2033
2883
2034
try:
2884
if zeroconf:
2885
# From the Avahi example code
2886
try:
2887
service.activate()
2888
except dbus.exceptions.DBusException as error:
2889
logger.critical("D-Bus Exception", exc_info=error)
2890
cleanup()
2891
sys.exit(1)
2892
# End of Avahi example code
2035
# From the Avahi example code
2036
try:
2037
service.activate()
2038
except dbus.exceptions.DBusException as error:
2039
logger.critical("DBusException: %s", error)
2040
cleanup()
2041
sys.exit(1)
2042
# End of Avahi example code
2893
2043
2894
2044
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2895
2045
lambda *args, **kwargs:
2899
2049
logger.debug("Starting main loop")
2900
2050
main_loop.run()
2901
2051
except AvahiError as error:
2902
logger.critical("Avahi Error", exc_info=error)
2052
logger.critical("AvahiError: %s", error)
2903
2053
cleanup()
2904
2054
sys.exit(1)
2905
2055
except KeyboardInterrupt:
2910
2060
# Must run before the D-Bus bus name gets deregistered
2911
2061
cleanup()
2912
2062
2913
2914
2063
if __name__ == '__main__':
2915
2064
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0