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- Committer: Björn Påhlsson
- Date: 2009-02-06 01:15:52 UTC
- mfrom: (299 mandos)
- mto: (24.1.154 mandos) (237.4.3 mandos-release)
- mto: This revision was merged to the branch mainline in revision 306.
- Revision ID: belorn@braxen-20090206011552-p07z71hj60jm7ncl
merge
- files removed:
- DBUS-API
- debian/source
- files modified:
- .bzrignore
added
removed
mandos
6
6
# This program is partly derived from an example program for an Avahi
7
7
# service publisher, downloaded from
8
8
# <http://avahi.org/wiki/PythonPublishExample>. This includes the
9
# methods "add", "remove", "server_state_changed",
10
# "entry_group_state_changed", "cleanup", and "activate" in the
11
# "AvahiService" class, and some lines in "main".
9
# methods "add" and "remove" in the "AvahiService" class, the
10
# "server_state_changed" and "entry_group_state_changed" functions,
11
# and some lines in "main".
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12
#
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13
# Everything else is
14
# Copyright © 2008-2011 Teddy Hogeborn
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# Copyright © 2008-2011 Björn Påhlsson
14
# Copyright © 2008,2009 Teddy Hogeborn
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# Copyright © 2008,2009 Björn Påhlsson
16
16
#
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# This program is free software: you can redistribute it and/or modify
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18
# it under the terms of the GNU General Public License as published by
28
28
# along with this program. If not, see
29
29
# <http://www.gnu.org/licenses/>.
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#
31
# Contact the authors at <mandos@recompile.se>.
31
# Contact the authors at <mandos@fukt.bsnet.se>.
32
32
#
33
33
34
from __future__ import (division, absolute_import, print_function,
35
unicode_literals)
34
from __future__ import division, with_statement, absolute_import
36
35
37
import SocketServer as socketserver
36
import SocketServer
38
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import socket
39
import argparse
38
import optparse
40
39
import datetime
41
40
import errno
42
41
import gnutls.crypto
45
44
import gnutls.library.functions
46
45
import gnutls.library.constants
47
46
import gnutls.library.types
48
import ConfigParser as configparser
47
import ConfigParser
49
48
import sys
50
49
import re
51
50
import os
52
51
import signal
52
from sets import Set
53
53
import subprocess
54
54
import atexit
55
55
import stat
56
56
import logging
57
57
import logging.handlers
58
58
import pwd
59
import contextlib
60
import struct
61
import fcntl
62
import functools
63
import cPickle as pickle
64
import multiprocessing
65
import types
66
import hashlib
59
from contextlib import closing
67
60
68
61
import dbus
69
62
import dbus.service
72
65
from dbus.mainloop.glib import DBusGMainLoop
73
66
import ctypes
74
67
import ctypes.util
75
import xml.dom.minidom
76
import inspect
77
import Crypto.Cipher.AES
78
79
try:
80
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
81
except AttributeError:
82
try:
83
from IN import SO_BINDTODEVICE
84
except ImportError:
85
SO_BINDTODEVICE = None
86
87
88
version = "1.4.1"
89
90
logger = logging.getLogger()
91
stored_state_path = "/var/lib/mandos/clients.pickle"
92
68
69
version = "1.0.5"
70
71
logger = logging.Logger('mandos')
93
72
syslogger = (logging.handlers.SysLogHandler
94
73
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
95
address = str("/dev/log")))
74
address = "/dev/log"))
96
75
syslogger.setFormatter(logging.Formatter
97
76
('Mandos [%(process)d]: %(levelname)s:'
98
77
' %(message)s'))
99
78
logger.addHandler(syslogger)
100
79
101
80
console = logging.StreamHandler()
102
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
103
' [%(process)d]:'
104
' %(levelname)s:'
105
' %(message)s'))
81
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
82
' %(levelname)s: %(message)s'))
106
83
logger.addHandler(console)
107
84
108
109
85
class AvahiError(Exception):
110
86
def __init__(self, value, *args, **kwargs):
111
87
self.value = value
122
98
123
99
class AvahiService(object):
124
100
"""An Avahi (Zeroconf) service.
125
126
101
Attributes:
127
102
interface: integer; avahi.IF_UNSPEC or an interface index.
128
103
Used to optionally bind to the specified interface.
136
111
max_renames: integer; maximum number of renames
137
112
rename_count: integer; counter so we only rename after collisions
138
113
a sensible number of times
139
group: D-Bus Entry Group
140
server: D-Bus Server
141
bus: dbus.SystemBus()
142
114
"""
143
115
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
144
116
servicetype = None, port = None, TXT = None,
145
domain = "", host = "", max_renames = 32768,
146
protocol = avahi.PROTO_UNSPEC, bus = None):
117
domain = "", host = "", max_renames = 32768):
147
118
self.interface = interface
148
119
self.name = name
149
120
self.type = servicetype
153
124
self.host = host
154
125
self.rename_count = 0
155
126
self.max_renames = max_renames
156
self.protocol = protocol
157
self.group = None # our entry group
158
self.server = None
159
self.bus = bus
160
self.entry_group_state_changed_match = None
161
127
def rename(self):
162
128
"""Derived from the Avahi example code"""
163
129
if self.rename_count >= self.max_renames:
164
logger.critical("No suitable Zeroconf service name found"
165
" after %i retries, exiting.",
130
logger.critical(u"No suitable Zeroconf service name found"
131
u" after %i retries, exiting.",
166
132
self.rename_count)
167
raise AvahiServiceError("Too many renames")
168
self.name = unicode(self.server
169
.GetAlternativeServiceName(self.name))
170
logger.info("Changing Zeroconf service name to %r ...",
171
self.name)
133
raise AvahiServiceError(u"Too many renames")
134
self.name = server.GetAlternativeServiceName(self.name)
135
logger.info(u"Changing Zeroconf service name to %r ...",
136
str(self.name))
137
syslogger.setFormatter(logging.Formatter
138
('Mandos (%s): %%(levelname)s:'
139
' %%(message)s' % self.name))
172
140
self.remove()
173
try:
174
self.add()
175
except dbus.exceptions.DBusException as error:
176
logger.critical("DBusException: %s", error)
177
self.cleanup()
178
os._exit(1)
141
self.add()
179
142
self.rename_count += 1
180
143
def remove(self):
181
144
"""Derived from the Avahi example code"""
182
if self.entry_group_state_changed_match is not None:
183
self.entry_group_state_changed_match.remove()
184
self.entry_group_state_changed_match = None
185
if self.group is not None:
186
self.group.Reset()
145
if group is not None:
146
group.Reset()
187
147
def add(self):
188
148
"""Derived from the Avahi example code"""
189
self.remove()
190
if self.group is None:
191
self.group = dbus.Interface(
192
self.bus.get_object(avahi.DBUS_NAME,
193
self.server.EntryGroupNew()),
194
avahi.DBUS_INTERFACE_ENTRY_GROUP)
195
self.entry_group_state_changed_match = (
196
self.group.connect_to_signal(
197
'StateChanged', self.entry_group_state_changed))
198
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
199
self.name, self.type)
200
self.group.AddService(
201
self.interface,
202
self.protocol,
203
dbus.UInt32(0), # flags
204
self.name, self.type,
205
self.domain, self.host,
206
dbus.UInt16(self.port),
207
avahi.string_array_to_txt_array(self.TXT))
208
self.group.Commit()
209
def entry_group_state_changed(self, state, error):
210
"""Derived from the Avahi example code"""
211
logger.debug("Avahi entry group state change: %i", state)
212
213
if state == avahi.ENTRY_GROUP_ESTABLISHED:
214
logger.debug("Zeroconf service established.")
215
elif state == avahi.ENTRY_GROUP_COLLISION:
216
logger.info("Zeroconf service name collision.")
217
self.rename()
218
elif state == avahi.ENTRY_GROUP_FAILURE:
219
logger.critical("Avahi: Error in group state changed %s",
220
unicode(error))
221
raise AvahiGroupError("State changed: %s"
222
% unicode(error))
223
def cleanup(self):
224
"""Derived from the Avahi example code"""
225
if self.group is not None:
226
try:
227
self.group.Free()
228
except (dbus.exceptions.UnknownMethodException,
229
dbus.exceptions.DBusException) as e:
230
pass
231
self.group = None
232
self.remove()
233
def server_state_changed(self, state, error=None):
234
"""Derived from the Avahi example code"""
235
logger.debug("Avahi server state change: %i", state)
236
bad_states = { avahi.SERVER_INVALID:
237
"Zeroconf server invalid",
238
avahi.SERVER_REGISTERING: None,
239
avahi.SERVER_COLLISION:
240
"Zeroconf server name collision",
241
avahi.SERVER_FAILURE:
242
"Zeroconf server failure" }
243
if state in bad_states:
244
if bad_states[state] is not None:
245
if error is None:
246
logger.error(bad_states[state])
247
else:
248
logger.error(bad_states[state] + ": %r", error)
249
self.cleanup()
250
elif state == avahi.SERVER_RUNNING:
251
self.add()
252
else:
253
if error is None:
254
logger.debug("Unknown state: %r", state)
255
else:
256
logger.debug("Unknown state: %r: %r", state, error)
257
def activate(self):
258
"""Derived from the Avahi example code"""
259
if self.server is None:
260
self.server = dbus.Interface(
261
self.bus.get_object(avahi.DBUS_NAME,
262
avahi.DBUS_PATH_SERVER,
263
follow_name_owner_changes=True),
264
avahi.DBUS_INTERFACE_SERVER)
265
self.server.connect_to_signal("StateChanged",
266
self.server_state_changed)
267
self.server_state_changed(self.server.GetState())
268
269
class AvahiServiceToSyslog(AvahiService):
270
def rename(self):
271
"""Add the new name to the syslog messages"""
272
ret = AvahiService.rename(self)
273
syslogger.setFormatter(logging.Formatter
274
('Mandos (%s) [%%(process)d]:'
275
' %%(levelname)s: %%(message)s'
276
% self.name))
277
return ret
278
279
def _timedelta_to_milliseconds(td):
280
"Convert a datetime.timedelta() to milliseconds"
281
return ((td.days * 24 * 60 * 60 * 1000)
282
+ (td.seconds * 1000)
283
+ (td.microseconds // 1000))
284
285
class Client(object):
149
global group
150
if group is None:
151
group = dbus.Interface(bus.get_object
152
(avahi.DBUS_NAME,
153
server.EntryGroupNew()),
154
avahi.DBUS_INTERFACE_ENTRY_GROUP)
155
group.connect_to_signal('StateChanged',
156
entry_group_state_changed)
157
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
158
service.name, service.type)
159
group.AddService(
160
self.interface, # interface
161
avahi.PROTO_INET6, # protocol
162
dbus.UInt32(0), # flags
163
self.name, self.type,
164
self.domain, self.host,
165
dbus.UInt16(self.port),
166
avahi.string_array_to_txt_array(self.TXT))
167
group.Commit()
168
169
# From the Avahi example code:
170
group = None # our entry group
171
# End of Avahi example code
172
173
174
def _datetime_to_dbus(dt, variant_level=0):
175
"""Convert a UTC datetime.datetime() to a D-Bus type."""
176
return dbus.String(dt.isoformat(), variant_level=variant_level)
177
178
179
class Client(dbus.service.Object):
286
180
"""A representation of a client host served by this server.
287
288
181
Attributes:
289
_approved: bool(); 'None' if not yet approved/disapproved
290
approval_delay: datetime.timedelta(); Time to wait for approval
291
approval_duration: datetime.timedelta(); Duration of one approval
182
name: string; from the config file, used in log messages and
183
D-Bus identifiers
184
fingerprint: string (40 or 32 hexadecimal digits); used to
185
uniquely identify the client
186
secret: bytestring; sent verbatim (over TLS) to client
187
host: string; available for use by the checker command
188
created: datetime.datetime(); (UTC) object creation
189
last_enabled: datetime.datetime(); (UTC)
190
enabled: bool()
191
last_checked_ok: datetime.datetime(); (UTC) or None
192
timeout: datetime.timedelta(); How long from last_checked_ok
193
until this client is invalid
194
interval: datetime.timedelta(); How often to start a new checker
195
disable_hook: If set, called by disable() as disable_hook(self)
292
196
checker: subprocess.Popen(); a running checker process used
293
197
to see if the client lives.
294
198
'None' if no process is running.
295
checker_callback_tag: a gobject event source tag, or None
296
checker_command: string; External command which is run to check
297
if client lives. %() expansions are done at
199
checker_initiator_tag: a gobject event source tag, or None
200
disable_initiator_tag: - '' -
201
checker_callback_tag: - '' -
202
checker_command: string; External command which is run to check if
203
client lives. %() expansions are done at
298
204
runtime with vars(self) as dict, so that for
299
205
instance %(name)s can be used in the command.
300
checker_initiator_tag: a gobject event source tag, or None
301
created: datetime.datetime(); (UTC) object creation
302
client_structure: Object describing what attributes a client has
303
and is used for storing the client at exit
304
current_checker_command: string; current running checker_command
305
disable_initiator_tag: a gobject event source tag, or None
306
enabled: bool()
307
fingerprint: string (40 or 32 hexadecimal digits); used to
308
uniquely identify the client
309
host: string; available for use by the checker command
310
interval: datetime.timedelta(); How often to start a new checker
311
last_approval_request: datetime.datetime(); (UTC) or None
312
last_checked_ok: datetime.datetime(); (UTC) or None
313
last_checker_status: integer between 0 and 255 reflecting exit status
314
of last checker. -1 reflect crashed checker,
315
or None.
316
last_enabled: datetime.datetime(); (UTC)
317
name: string; from the config file, used in log messages and
318
D-Bus identifiers
319
secret: bytestring; sent verbatim (over TLS) to client
320
timeout: datetime.timedelta(); How long from last_checked_ok
321
until this client is disabled
322
extended_timeout: extra long timeout when password has been sent
323
runtime_expansions: Allowed attributes for runtime expansion.
324
expires: datetime.datetime(); time (UTC) when a client will be
325
disabled, or None
206
use_dbus: bool(); Whether to provide D-Bus interface and signals
207
dbus_object_path: dbus.ObjectPath ; only set if self.use_dbus
326
208
"""
327
328
runtime_expansions = ("approval_delay", "approval_duration",
329
"created", "enabled", "fingerprint",
330
"host", "interval", "last_checked_ok",
331
"last_enabled", "name", "timeout")
332
333
209
def timeout_milliseconds(self):
334
210
"Return the 'timeout' attribute in milliseconds"
335
return _timedelta_to_milliseconds(self.timeout)
336
337
def extended_timeout_milliseconds(self):
338
"Return the 'extended_timeout' attribute in milliseconds"
339
return _timedelta_to_milliseconds(self.extended_timeout)
211
return ((self.timeout.days * 24 * 60 * 60 * 1000)
212
+ (self.timeout.seconds * 1000)
213
+ (self.timeout.microseconds // 1000))
340
214
341
215
def interval_milliseconds(self):
342
216
"Return the 'interval' attribute in milliseconds"
343
return _timedelta_to_milliseconds(self.interval)
344
345
def approval_delay_milliseconds(self):
346
return _timedelta_to_milliseconds(self.approval_delay)
347
348
def __init__(self, name = None, config=None):
217
return ((self.interval.days * 24 * 60 * 60 * 1000)
218
+ (self.interval.seconds * 1000)
219
+ (self.interval.microseconds // 1000))
220
221
def __init__(self, name = None, disable_hook=None, config=None,
222
use_dbus=True):
349
223
"""Note: the 'checker' key in 'config' sets the
350
224
'checker_command' attribute and *not* the 'checker'
351
225
attribute."""
352
226
self.name = name
353
227
if config is None:
354
228
config = {}
355
logger.debug("Creating client %r", self.name)
229
logger.debug(u"Creating client %r", self.name)
230
self.use_dbus = False # During __init__
356
231
# Uppercase and remove spaces from fingerprint for later
357
232
# comparison purposes with return value from the fingerprint()
358
233
# function
359
234
self.fingerprint = (config["fingerprint"].upper()
360
.replace(" ", ""))
361
logger.debug(" Fingerprint: %s", self.fingerprint)
235
.replace(u" ", u""))
236
logger.debug(u" Fingerprint: %s", self.fingerprint)
362
237
if "secret" in config:
363
self.secret = config["secret"].decode("base64")
238
self.secret = config["secret"].decode(u"base64")
364
239
elif "secfile" in config:
365
with open(os.path.expanduser(os.path.expandvars
366
(config["secfile"])),
367
"rb") as secfile:
240
with closing(open(os.path.expanduser
241
(os.path.expandvars
242
(config["secfile"])))) as secfile:
368
243
self.secret = secfile.read()
369
244
else:
370
raise TypeError("No secret or secfile for client %s"
245
raise TypeError(u"No secret or secfile for client %s"
371
246
% self.name)
372
247
self.host = config.get("host", "")
373
248
self.created = datetime.datetime.utcnow()
374
self.enabled = True
375
self.last_approval_request = None
376
self.last_enabled = datetime.datetime.utcnow()
249
self.enabled = False
250
self.last_enabled = None
377
251
self.last_checked_ok = None
378
self.last_checker_status = None
379
252
self.timeout = string_to_delta(config["timeout"])
380
self.extended_timeout = string_to_delta(config
381
["extended_timeout"])
382
253
self.interval = string_to_delta(config["interval"])
254
self.disable_hook = disable_hook
383
255
self.checker = None
384
256
self.checker_initiator_tag = None
385
257
self.disable_initiator_tag = None
386
self.expires = datetime.datetime.utcnow() + self.timeout
387
258
self.checker_callback_tag = None
388
259
self.checker_command = config["checker"]
389
self.current_checker_command = None
390
self._approved = None
391
self.approved_by_default = config.get("approved_by_default",
392
True)
393
self.approvals_pending = 0
394
self.approval_delay = string_to_delta(
395
config["approval_delay"])
396
self.approval_duration = string_to_delta(
397
config["approval_duration"])
398
self.changedstate = (multiprocessing_manager
399
.Condition(multiprocessing_manager
400
.Lock()))
401
self.client_structure = [attr for attr in self.__dict__.iterkeys() if not attr.startswith("_")]
402
self.client_structure.append("client_structure")
403
404
405
for name, t in inspect.getmembers(type(self),
406
lambda obj: isinstance(obj, property)):
407
if not name.startswith("_"):
408
self.client_structure.append(name)
409
410
# Send notice to process children that client state has changed
411
def send_changedstate(self):
412
with self.changedstate:
413
self.changedstate.notify_all()
260
self.last_connect = None
261
# Only now, when this client is initialized, can it show up on
262
# the D-Bus
263
self.use_dbus = use_dbus
264
if self.use_dbus:
265
self.dbus_object_path = (dbus.ObjectPath
266
("/clients/"
267
+ self.name.replace(".", "_")))
268
dbus.service.Object.__init__(self, bus,
269
self.dbus_object_path)
414
270
415
271
def enable(self):
416
272
"""Start this client's checker and timeout hooks"""
417
if getattr(self, "enabled", False):
418
# Already enabled
419
return
420
self.send_changedstate()
421
self.expires = datetime.datetime.utcnow() + self.timeout
273
self.last_enabled = datetime.datetime.utcnow()
274
# Schedule a new checker to be started an 'interval' from now,
275
# and every interval from then on.
276
self.checker_initiator_tag = (gobject.timeout_add
277
(self.interval_milliseconds(),
278
self.start_checker))
279
# Also start a new checker *right now*.
280
self.start_checker()
281
# Schedule a disable() when 'timeout' has passed
282
self.disable_initiator_tag = (gobject.timeout_add
283
(self.timeout_milliseconds(),
284
self.disable))
422
285
self.enabled = True
423
self.last_enabled = datetime.datetime.utcnow()
424
self.init_checker()
286
if self.use_dbus:
287
# Emit D-Bus signals
288
self.PropertyChanged(dbus.String(u"enabled"),
289
dbus.Boolean(True, variant_level=1))
290
self.PropertyChanged(dbus.String(u"last_enabled"),
291
(_datetime_to_dbus(self.last_enabled,
292
variant_level=1)))
425
293
426
def disable(self, quiet=True):
294
def disable(self):
427
295
"""Disable this client."""
428
296
if not getattr(self, "enabled", False):
429
297
return False
430
if not quiet:
431
self.send_changedstate()
432
if not quiet:
433
logger.info("Disabling client %s", self.name)
298
logger.info(u"Disabling client %s", self.name)
434
299
if getattr(self, "disable_initiator_tag", False):
435
300
gobject.source_remove(self.disable_initiator_tag)
436
301
self.disable_initiator_tag = None
437
self.expires = None
438
302
if getattr(self, "checker_initiator_tag", False):
439
303
gobject.source_remove(self.checker_initiator_tag)
440
304
self.checker_initiator_tag = None
441
305
self.stop_checker()
306
if self.disable_hook:
307
self.disable_hook(self)
442
308
self.enabled = False
309
if self.use_dbus:
310
# Emit D-Bus signal
311
self.PropertyChanged(dbus.String(u"enabled"),
312
dbus.Boolean(False, variant_level=1))
443
313
# Do not run this again if called by a gobject.timeout_add
444
314
return False
445
315
446
316
def __del__(self):
317
self.disable_hook = None
447
318
self.disable()
448
449
def init_checker(self):
450
# Schedule a new checker to be started an 'interval' from now,
451
# and every interval from then on.
452
self.checker_initiator_tag = (gobject.timeout_add
453
(self.interval_milliseconds(),
454
self.start_checker))
455
# Schedule a disable() when 'timeout' has passed
456
self.disable_initiator_tag = (gobject.timeout_add
457
(self.timeout_milliseconds(),
458
self.disable))
459
# Also start a new checker *right now*.
460
self.start_checker()
461
462
319
463
320
def checker_callback(self, pid, condition, command):
464
321
"""The checker has completed, so take appropriate actions."""
465
322
self.checker_callback_tag = None
466
323
self.checker = None
324
if self.use_dbus:
325
# Emit D-Bus signal
326
self.PropertyChanged(dbus.String(u"checker_running"),
327
dbus.Boolean(False, variant_level=1))
467
328
if os.WIFEXITED(condition):
468
self.last_checker_status = os.WEXITSTATUS(condition)
469
if self.last_checker_status == 0:
470
logger.info("Checker for %(name)s succeeded",
329
exitstatus = os.WEXITSTATUS(condition)
330
if exitstatus == 0:
331
logger.info(u"Checker for %(name)s succeeded",
471
332
vars(self))
472
333
self.checked_ok()
473
334
else:
474
logger.info("Checker for %(name)s failed",
335
logger.info(u"Checker for %(name)s failed",
475
336
vars(self))
337
if self.use_dbus:
338
# Emit D-Bus signal
339
self.CheckerCompleted(dbus.Int16(exitstatus),
340
dbus.Int64(condition),
341
dbus.String(command))
476
342
else:
477
self.last_checker_status = -1
478
logger.warning("Checker for %(name)s crashed?",
343
logger.warning(u"Checker for %(name)s crashed?",
479
344
vars(self))
345
if self.use_dbus:
346
# Emit D-Bus signal
347
self.CheckerCompleted(dbus.Int16(-1),
348
dbus.Int64(condition),
349
dbus.String(command))
480
350
481
def checked_ok(self, timeout=None):
351
def checked_ok(self):
482
352
"""Bump up the timeout for this client.
483
484
353
This should only be called when the client has been seen,
485
354
alive and well.
486
355
"""
487
if timeout is None:
488
timeout = self.timeout
489
356
self.last_checked_ok = datetime.datetime.utcnow()
490
if self.disable_initiator_tag is not None:
491
gobject.source_remove(self.disable_initiator_tag)
492
if getattr(self, "enabled", False):
493
self.disable_initiator_tag = (gobject.timeout_add
494
(_timedelta_to_milliseconds
495
(timeout), self.disable))
496
self.expires = datetime.datetime.utcnow() + timeout
497
498
def need_approval(self):
499
self.last_approval_request = datetime.datetime.utcnow()
357
gobject.source_remove(self.disable_initiator_tag)
358
self.disable_initiator_tag = (gobject.timeout_add
359
(self.timeout_milliseconds(),
360
self.disable))
361
if self.use_dbus:
362
# Emit D-Bus signal
363
self.PropertyChanged(
364
dbus.String(u"last_checked_ok"),
365
(_datetime_to_dbus(self.last_checked_ok,
366
variant_level=1)))
500
367
501
368
def start_checker(self):
502
369
"""Start a new checker subprocess if one is not running.
503
504
370
If a checker already exists, leave it running and do
505
371
nothing."""
506
372
# The reason for not killing a running checker is that if we
509
375
# client would inevitably timeout, since no checker would get
510
376
# a chance to run to completion. If we instead leave running
511
377
# checkers alone, the checker would have to take more time
512
# than 'timeout' for the client to be disabled, which is as it
513
# should be.
514
515
# If a checker exists, make sure it is not a zombie
516
try:
517
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
518
except (AttributeError, OSError) as error:
519
if (isinstance(error, OSError)
520
and error.errno != errno.ECHILD):
521
raise error
522
else:
523
if pid:
524
logger.warning("Checker was a zombie")
525
gobject.source_remove(self.checker_callback_tag)
526
self.checker_callback(pid, status,
527
self.current_checker_command)
528
# Start a new checker if needed
378
# than 'timeout' for the client to be declared invalid, which
379
# is as it should be.
529
380
if self.checker is None:
530
381
try:
531
382
# In case checker_command has exactly one % operator
532
383
command = self.checker_command % self.host
533
384
except TypeError:
534
385
# Escape attributes for the shell
535
escaped_attrs = dict(
536
(attr,
537
re.escape(unicode(str(getattr(self, attr, "")),
538
errors=
539
'replace')))
540
for attr in
541
self.runtime_expansions)
542
386
escaped_attrs = dict((key, re.escape(str(val)))
387
for key, val in
388
vars(self).iteritems())
543
389
try:
544
390
command = self.checker_command % escaped_attrs
545
except TypeError as error:
546
logger.error('Could not format string "%s":'
547
' %s', self.checker_command, error)
391
except TypeError, error:
392
logger.error(u'Could not format string "%s":'
393
u' %s', self.checker_command, error)
548
394
return True # Try again later
549
self.current_checker_command = command
550
395
try:
551
logger.info("Starting checker %r for %s",
396
logger.info(u"Starting checker %r for %s",
552
397
command, self.name)
553
398
# We don't need to redirect stdout and stderr, since
554
399
# in normal mode, that is already done by daemon(),
557
402
self.checker = subprocess.Popen(command,
558
403
close_fds=True,
559
404
shell=True, cwd="/")
405
if self.use_dbus:
406
# Emit D-Bus signal
407
self.CheckerStarted(command)
408
self.PropertyChanged(
409
dbus.String("checker_running"),
410
dbus.Boolean(True, variant_level=1))
560
411
self.checker_callback_tag = (gobject.child_watch_add
561
412
(self.checker.pid,
562
413
self.checker_callback,
563
414
data=command))
564
# The checker may have completed before the gobject
565
# watch was added. Check for this.
566
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
567
if pid:
568
gobject.source_remove(self.checker_callback_tag)
569
self.checker_callback(pid, status, command)
570
except OSError as error:
571
logger.error("Failed to start subprocess: %s",
415
except OSError, error:
416
logger.error(u"Failed to start subprocess: %s",
572
417
error)
573
418
# Re-run this periodically if run by gobject.timeout_add
574
419
return True
580
425
self.checker_callback_tag = None
581
426
if getattr(self, "checker", None) is None:
582
427
return
583
logger.debug("Stopping checker for %(name)s", vars(self))
428
logger.debug(u"Stopping checker for %(name)s", vars(self))
584
429
try:
585
430
os.kill(self.checker.pid, signal.SIGTERM)
586
#time.sleep(0.5)
431
#os.sleep(0.5)
587
432
#if self.checker.poll() is None:
588
433
# os.kill(self.checker.pid, signal.SIGKILL)
589
except OSError as error:
434
except OSError, error:
590
435
if error.errno != errno.ESRCH: # No such process
591
436
raise
592
437
self.checker = None
593
594
# Encrypts a client secret and stores it in a varible encrypted_secret
595
def encrypt_secret(self, key):
596
# Encryption-key need to be of a specific size, so we hash inputed key
597
hasheng = hashlib.sha256()
598
hasheng.update(key)
599
encryptionkey = hasheng.digest()
600
601
# Create validation hash so we know at decryption if it was sucessful
602
hasheng = hashlib.sha256()
603
hasheng.update(self.secret)
604
validationhash = hasheng.digest()
605
606
# Encrypt secret
607
iv = os.urandom(Crypto.Cipher.AES.block_size)
608
ciphereng = Crypto.Cipher.AES.new(encryptionkey,
609
Crypto.Cipher.AES.MODE_CFB, iv)
610
ciphertext = ciphereng.encrypt(validationhash+self.secret)
611
self.encrypted_secret = (ciphertext, iv)
612
613
# Decrypt a encrypted client secret
614
def decrypt_secret(self, key):
615
# Decryption-key need to be of a specific size, so we hash inputed key
616
hasheng = hashlib.sha256()
617
hasheng.update(key)
618
encryptionkey = hasheng.digest()
619
620
# Decrypt encrypted secret
621
ciphertext, iv = self.encrypted_secret
622
ciphereng = Crypto.Cipher.AES.new(encryptionkey,
623
Crypto.Cipher.AES.MODE_CFB, iv)
624
plain = ciphereng.decrypt(ciphertext)
625
626
# Validate decrypted secret to know if it was succesful
627
hasheng = hashlib.sha256()
628
validationhash = plain[:hasheng.digest_size]
629
secret = plain[hasheng.digest_size:]
630
hasheng.update(secret)
631
632
# if validation fails, we use key as new secret. Otherwhise, we use
633
# the decrypted secret
634
if hasheng.digest() == validationhash:
635
self.secret = secret
636
else:
637
self.secret = key
638
del self.encrypted_secret
639
640
641
def dbus_service_property(dbus_interface, signature="v",
642
access="readwrite", byte_arrays=False):
643
"""Decorators for marking methods of a DBusObjectWithProperties to
644
become properties on the D-Bus.
645
646
The decorated method will be called with no arguments by "Get"
647
and with one argument by "Set".
648
649
The parameters, where they are supported, are the same as
650
dbus.service.method, except there is only "signature", since the
651
type from Get() and the type sent to Set() is the same.
652
"""
653
# Encoding deeply encoded byte arrays is not supported yet by the
654
# "Set" method, so we fail early here:
655
if byte_arrays and signature != "ay":
656
raise ValueError("Byte arrays not supported for non-'ay'"
657
" signature %r" % signature)
658
def decorator(func):
659
func._dbus_is_property = True
660
func._dbus_interface = dbus_interface
661
func._dbus_signature = signature
662
func._dbus_access = access
663
func._dbus_name = func.__name__
664
if func._dbus_name.endswith("_dbus_property"):
665
func._dbus_name = func._dbus_name[:-14]
666
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
667
return func
668
return decorator
669
670
671
class DBusPropertyException(dbus.exceptions.DBusException):
672
"""A base class for D-Bus property-related exceptions
673
"""
674
def __unicode__(self):
675
return unicode(str(self))
676
677
678
class DBusPropertyAccessException(DBusPropertyException):
679
"""A property's access permissions disallows an operation.
680
"""
681
pass
682
683
684
class DBusPropertyNotFound(DBusPropertyException):
685
"""An attempt was made to access a non-existing property.
686
"""
687
pass
688
689
690
class DBusObjectWithProperties(dbus.service.Object):
691
"""A D-Bus object with properties.
692
693
Classes inheriting from this can use the dbus_service_property
694
decorator to expose methods as D-Bus properties. It exposes the
695
standard Get(), Set(), and GetAll() methods on the D-Bus.
696
"""
697
698
@staticmethod
699
def _is_dbus_property(obj):
700
return getattr(obj, "_dbus_is_property", False)
701
702
def _get_all_dbus_properties(self):
703
"""Returns a generator of (name, attribute) pairs
704
"""
705
return ((prop.__get__(self)._dbus_name, prop.__get__(self))
706
for cls in self.__class__.__mro__
707
for name, prop in
708
inspect.getmembers(cls, self._is_dbus_property))
709
710
def _get_dbus_property(self, interface_name, property_name):
711
"""Returns a bound method if one exists which is a D-Bus
712
property with the specified name and interface.
713
"""
714
for cls in self.__class__.__mro__:
715
for name, value in (inspect.getmembers
716
(cls, self._is_dbus_property)):
717
if (value._dbus_name == property_name
718
and value._dbus_interface == interface_name):
719
return value.__get__(self)
720
721
# No such property
722
raise DBusPropertyNotFound(self.dbus_object_path + ":"
723
+ interface_name + "."
724
+ property_name)
725
726
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
727
out_signature="v")
728
def Get(self, interface_name, property_name):
729
"""Standard D-Bus property Get() method, see D-Bus standard.
730
"""
731
prop = self._get_dbus_property(interface_name, property_name)
732
if prop._dbus_access == "write":
733
raise DBusPropertyAccessException(property_name)
734
value = prop()
735
if not hasattr(value, "variant_level"):
736
return value
737
return type(value)(value, variant_level=value.variant_level+1)
738
739
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
740
def Set(self, interface_name, property_name, value):
741
"""Standard D-Bus property Set() method, see D-Bus standard.
742
"""
743
prop = self._get_dbus_property(interface_name, property_name)
744
if prop._dbus_access == "read":
745
raise DBusPropertyAccessException(property_name)
746
if prop._dbus_get_args_options["byte_arrays"]:
747
# The byte_arrays option is not supported yet on
748
# signatures other than "ay".
749
if prop._dbus_signature != "ay":
750
raise ValueError
751
value = dbus.ByteArray(''.join(unichr(byte)
752
for byte in value))
753
prop(value)
754
755
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
756
out_signature="a{sv}")
757
def GetAll(self, interface_name):
758
"""Standard D-Bus property GetAll() method, see D-Bus
759
standard.
760
761
Note: Will not include properties with access="write".
762
"""
763
all = {}
764
for name, prop in self._get_all_dbus_properties():
765
if (interface_name
766
and interface_name != prop._dbus_interface):
767
# Interface non-empty but did not match
768
continue
769
# Ignore write-only properties
770
if prop._dbus_access == "write":
771
continue
772
value = prop()
773
if not hasattr(value, "variant_level"):
774
all[name] = value
775
continue
776
all[name] = type(value)(value, variant_level=
777
value.variant_level+1)
778
return dbus.Dictionary(all, signature="sv")
779
780
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
781
out_signature="s",
782
path_keyword='object_path',
783
connection_keyword='connection')
784
def Introspect(self, object_path, connection):
785
"""Standard D-Bus method, overloaded to insert property tags.
786
"""
787
xmlstring = dbus.service.Object.Introspect(self, object_path,
788
connection)
789
try:
790
document = xml.dom.minidom.parseString(xmlstring)
791
def make_tag(document, name, prop):
792
e = document.createElement("property")
793
e.setAttribute("name", name)
794
e.setAttribute("type", prop._dbus_signature)
795
e.setAttribute("access", prop._dbus_access)
796
return e
797
for if_tag in document.getElementsByTagName("interface"):
798
for tag in (make_tag(document, name, prop)
799
for name, prop
800
in self._get_all_dbus_properties()
801
if prop._dbus_interface
802
== if_tag.getAttribute("name")):
803
if_tag.appendChild(tag)
804
# Add the names to the return values for the
805
# "org.freedesktop.DBus.Properties" methods
806
if (if_tag.getAttribute("name")
807
== "org.freedesktop.DBus.Properties"):
808
for cn in if_tag.getElementsByTagName("method"):
809
if cn.getAttribute("name") == "Get":
810
for arg in cn.getElementsByTagName("arg"):
811
if (arg.getAttribute("direction")
812
== "out"):
813
arg.setAttribute("name", "value")
814
elif cn.getAttribute("name") == "GetAll":
815
for arg in cn.getElementsByTagName("arg"):
816
if (arg.getAttribute("direction")
817
== "out"):
818
arg.setAttribute("name", "props")
819
xmlstring = document.toxml("utf-8")
820
document.unlink()
821
except (AttributeError, xml.dom.DOMException,
822
xml.parsers.expat.ExpatError) as error:
823
logger.error("Failed to override Introspection method",
824
error)
825
return xmlstring
826
827
828
def datetime_to_dbus (dt, variant_level=0):
829
"""Convert a UTC datetime.datetime() to a D-Bus type."""
830
if dt is None:
831
return dbus.String("", variant_level = variant_level)
832
return dbus.String(dt.isoformat(),
833
variant_level=variant_level)
834
835
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
836
.__metaclass__):
837
"""Applied to an empty subclass of a D-Bus object, this metaclass
838
will add additional D-Bus attributes matching a certain pattern.
839
"""
840
def __new__(mcs, name, bases, attr):
841
# Go through all the base classes which could have D-Bus
842
# methods, signals, or properties in them
843
for base in (b for b in bases
844
if issubclass(b, dbus.service.Object)):
845
# Go though all attributes of the base class
846
for attrname, attribute in inspect.getmembers(base):
847
# Ignore non-D-Bus attributes, and D-Bus attributes
848
# with the wrong interface name
849
if (not hasattr(attribute, "_dbus_interface")
850
or not attribute._dbus_interface
851
.startswith("se.recompile.Mandos")):
852
continue
853
# Create an alternate D-Bus interface name based on
854
# the current name
855
alt_interface = (attribute._dbus_interface
856
.replace("se.recompile.Mandos",
857
"se.bsnet.fukt.Mandos"))
858
# Is this a D-Bus signal?
859
if getattr(attribute, "_dbus_is_signal", False):
860
# Extract the original non-method function by
861
# black magic
862
nonmethod_func = (dict(
863
zip(attribute.func_code.co_freevars,
864
attribute.__closure__))["func"]
865
.cell_contents)
866
# Create a new, but exactly alike, function
867
# object, and decorate it to be a new D-Bus signal
868
# with the alternate D-Bus interface name
869
new_function = (dbus.service.signal
870
(alt_interface,
871
attribute._dbus_signature)
872
(types.FunctionType(
873
nonmethod_func.func_code,
874
nonmethod_func.func_globals,
875
nonmethod_func.func_name,
876
nonmethod_func.func_defaults,
877
nonmethod_func.func_closure)))
878
# Define a creator of a function to call both the
879
# old and new functions, so both the old and new
880
# signals gets sent when the function is called
881
def fixscope(func1, func2):
882
"""This function is a scope container to pass
883
func1 and func2 to the "call_both" function
884
outside of its arguments"""
885
def call_both(*args, **kwargs):
886
"""This function will emit two D-Bus
887
signals by calling func1 and func2"""
888
func1(*args, **kwargs)
889
func2(*args, **kwargs)
890
return call_both
891
# Create the "call_both" function and add it to
892
# the class
893
attr[attrname] = fixscope(attribute,
894
new_function)
895
# Is this a D-Bus method?
896
elif getattr(attribute, "_dbus_is_method", False):
897
# Create a new, but exactly alike, function
898
# object. Decorate it to be a new D-Bus method
899
# with the alternate D-Bus interface name. Add it
900
# to the class.
901
attr[attrname] = (dbus.service.method
902
(alt_interface,
903
attribute._dbus_in_signature,
904
attribute._dbus_out_signature)
905
(types.FunctionType
906
(attribute.func_code,
907
attribute.func_globals,
908
attribute.func_name,
909
attribute.func_defaults,
910
attribute.func_closure)))
911
# Is this a D-Bus property?
912
elif getattr(attribute, "_dbus_is_property", False):
913
# Create a new, but exactly alike, function
914
# object, and decorate it to be a new D-Bus
915
# property with the alternate D-Bus interface
916
# name. Add it to the class.
917
attr[attrname] = (dbus_service_property
918
(alt_interface,
919
attribute._dbus_signature,
920
attribute._dbus_access,
921
attribute
922
._dbus_get_args_options
923
["byte_arrays"])
924
(types.FunctionType
925
(attribute.func_code,
926
attribute.func_globals,
927
attribute.func_name,
928
attribute.func_defaults,
929
attribute.func_closure)))
930
return type.__new__(mcs, name, bases, attr)
931
932
class ClientDBus(Client, DBusObjectWithProperties):
933
"""A Client class using D-Bus
934
935
Attributes:
936
dbus_object_path: dbus.ObjectPath
937
bus: dbus.SystemBus()
938
"""
939
940
runtime_expansions = (Client.runtime_expansions
941
+ ("dbus_object_path",))
942
943
# dbus.service.Object doesn't use super(), so we can't either.
944
945
def __init__(self, bus = None, *args, **kwargs):
946
self.bus = bus
947
Client.__init__(self, *args, **kwargs)
948
949
self._approvals_pending = 0
950
# Only now, when this client is initialized, can it show up on
951
# the D-Bus
952
client_object_name = unicode(self.name).translate(
953
{ord("."): ord("_"),
954
ord("-"): ord("_")})
955
self.dbus_object_path = (dbus.ObjectPath
956
("/clients/" + client_object_name))
957
DBusObjectWithProperties.__init__(self, self.bus,
958
self.dbus_object_path)
959
960
def notifychangeproperty(transform_func,
961
dbus_name, type_func=lambda x: x,
962
variant_level=1):
963
""" Modify a variable so that it's a property which announces
964
its changes to DBus.
965
966
transform_fun: Function that takes a value and a variant_level
967
and transforms it to a D-Bus type.
968
dbus_name: D-Bus name of the variable
969
type_func: Function that transform the value before sending it
970
to the D-Bus. Default: no transform
971
variant_level: D-Bus variant level. Default: 1
972
"""
973
attrname = "_{0}".format(dbus_name)
974
def setter(self, value):
975
if hasattr(self, "dbus_object_path"):
976
if (not hasattr(self, attrname) or
977
type_func(getattr(self, attrname, None))
978
!= type_func(value)):
979
dbus_value = transform_func(type_func(value),
980
variant_level
981
=variant_level)
982
self.PropertyChanged(dbus.String(dbus_name),
983
dbus_value)
984
setattr(self, attrname, value)
985
986
return property(lambda self: getattr(self, attrname), setter)
987
988
989
expires = notifychangeproperty(datetime_to_dbus, "Expires")
990
approvals_pending = notifychangeproperty(dbus.Boolean,
991
"ApprovalPending",
992
type_func = bool)
993
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
994
last_enabled = notifychangeproperty(datetime_to_dbus,
995
"LastEnabled")
996
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
997
type_func = lambda checker:
998
checker is not None)
999
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1000
"LastCheckedOK")
1001
last_approval_request = notifychangeproperty(
1002
datetime_to_dbus, "LastApprovalRequest")
1003
approved_by_default = notifychangeproperty(dbus.Boolean,
1004
"ApprovedByDefault")
1005
approval_delay = notifychangeproperty(dbus.UInt16,
1006
"ApprovalDelay",
1007
type_func =
1008
_timedelta_to_milliseconds)
1009
approval_duration = notifychangeproperty(
1010
dbus.UInt16, "ApprovalDuration",
1011
type_func = _timedelta_to_milliseconds)
1012
host = notifychangeproperty(dbus.String, "Host")
1013
timeout = notifychangeproperty(dbus.UInt16, "Timeout",
1014
type_func =
1015
_timedelta_to_milliseconds)
1016
extended_timeout = notifychangeproperty(
1017
dbus.UInt16, "ExtendedTimeout",
1018
type_func = _timedelta_to_milliseconds)
1019
interval = notifychangeproperty(dbus.UInt16,
1020
"Interval",
1021
type_func =
1022
_timedelta_to_milliseconds)
1023
checker_command = notifychangeproperty(dbus.String, "Checker")
1024
1025
del notifychangeproperty
1026
1027
def __del__(self, *args, **kwargs):
1028
try:
1029
self.remove_from_connection()
1030
except LookupError:
1031
pass
1032
if hasattr(DBusObjectWithProperties, "__del__"):
1033
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1034
Client.__del__(self, *args, **kwargs)
1035
1036
def checker_callback(self, pid, condition, command,
1037
*args, **kwargs):
1038
self.checker_callback_tag = None
1039
self.checker = None
1040
if os.WIFEXITED(condition):
1041
exitstatus = os.WEXITSTATUS(condition)
1042
# Emit D-Bus signal
1043
self.CheckerCompleted(dbus.Int16(exitstatus),
1044
dbus.Int64(condition),
1045
dbus.String(command))
1046
else:
1047
# Emit D-Bus signal
1048
self.CheckerCompleted(dbus.Int16(-1),
1049
dbus.Int64(condition),
1050
dbus.String(command))
1051
1052
return Client.checker_callback(self, pid, condition, command,
1053
*args, **kwargs)
1054
1055
def start_checker(self, *args, **kwargs):
1056
old_checker = self.checker
1057
if self.checker is not None:
1058
old_checker_pid = self.checker.pid
1059
else:
1060
old_checker_pid = None
1061
r = Client.start_checker(self, *args, **kwargs)
1062
# Only if new checker process was started
1063
if (self.checker is not None
1064
and old_checker_pid != self.checker.pid):
1065
# Emit D-Bus signal
1066
self.CheckerStarted(self.current_checker_command)
1067
return r
1068
1069
def _reset_approved(self):
1070
self._approved = None
1071
return False
1072
1073
def approve(self, value=True):
1074
self.send_changedstate()
1075
self._approved = value
1076
gobject.timeout_add(_timedelta_to_milliseconds
1077
(self.approval_duration),
1078
self._reset_approved)
1079
1080
1081
## D-Bus methods, signals & properties
1082
_interface = "se.recompile.Mandos.Client"
1083
1084
## Signals
438
if self.use_dbus:
439
self.PropertyChanged(dbus.String(u"checker_running"),
440
dbus.Boolean(False, variant_level=1))
441
442
def still_valid(self):
443
"""Has the timeout not yet passed for this client?"""
444
if not getattr(self, "enabled", False):
445
return False
446
now = datetime.datetime.utcnow()
447
if self.last_checked_ok is None:
448
return now < (self.created + self.timeout)
449
else:
450
return now < (self.last_checked_ok + self.timeout)
451
452
## D-Bus methods & signals
453
_interface = u"se.bsnet.fukt.Mandos.Client"
454
455
# CheckedOK - method
456
CheckedOK = dbus.service.method(_interface)(checked_ok)
457
CheckedOK.__name__ = "CheckedOK"
1085
458
1086
459
# CheckerCompleted - signal
1087
460
@dbus.service.signal(_interface, signature="nxs")
1095
468
"D-Bus signal"
1096
469
pass
1097
470
471
# GetAllProperties - method
472
@dbus.service.method(_interface, out_signature="a{sv}")
473
def GetAllProperties(self):
474
"D-Bus method"
475
return dbus.Dictionary({
476
dbus.String("name"):
477
dbus.String(self.name, variant_level=1),
478
dbus.String("fingerprint"):
479
dbus.String(self.fingerprint, variant_level=1),
480
dbus.String("host"):
481
dbus.String(self.host, variant_level=1),
482
dbus.String("created"):
483
_datetime_to_dbus(self.created, variant_level=1),
484
dbus.String("last_enabled"):
485
(_datetime_to_dbus(self.last_enabled,
486
variant_level=1)
487
if self.last_enabled is not None
488
else dbus.Boolean(False, variant_level=1)),
489
dbus.String("enabled"):
490
dbus.Boolean(self.enabled, variant_level=1),
491
dbus.String("last_checked_ok"):
492
(_datetime_to_dbus(self.last_checked_ok,
493
variant_level=1)
494
if self.last_checked_ok is not None
495
else dbus.Boolean (False, variant_level=1)),
496
dbus.String("timeout"):
497
dbus.UInt64(self.timeout_milliseconds(),
498
variant_level=1),
499
dbus.String("interval"):
500
dbus.UInt64(self.interval_milliseconds(),
501
variant_level=1),
502
dbus.String("checker"):
503
dbus.String(self.checker_command,
504
variant_level=1),
505
dbus.String("checker_running"):
506
dbus.Boolean(self.checker is not None,
507
variant_level=1),
508
dbus.String("object_path"):
509
dbus.ObjectPath(self.dbus_object_path,
510
variant_level=1)
511
}, signature="sv")
512
513
# IsStillValid - method
514
IsStillValid = (dbus.service.method(_interface, out_signature="b")
515
(still_valid))
516
IsStillValid.__name__ = "IsStillValid"
517
1098
518
# PropertyChanged - signal
1099
519
@dbus.service.signal(_interface, signature="sv")
1100
520
def PropertyChanged(self, property, value):
1101
521
"D-Bus signal"
1102
522
pass
1103
523
1104
# GotSecret - signal
1105
@dbus.service.signal(_interface)
1106
def GotSecret(self):
1107
"""D-Bus signal
1108
Is sent after a successful transfer of secret from the Mandos
1109
server to mandos-client
1110
"""
1111
pass
1112
1113
# Rejected - signal
1114
@dbus.service.signal(_interface, signature="s")
1115
def Rejected(self, reason):
1116
"D-Bus signal"
1117
pass
1118
1119
# NeedApproval - signal
1120
@dbus.service.signal(_interface, signature="tb")
1121
def NeedApproval(self, timeout, default):
1122
"D-Bus signal"
1123
return self.need_approval()
1124
1125
# NeRwequest - signal
1126
@dbus.service.signal(_interface, signature="s")
1127
def NewRequest(self, ip):
1128
"""D-Bus signal
1129
Is sent after a client request a password.
1130
"""
1131
pass
1132
1133
## Methods
1134
1135
# Approve - method
1136
@dbus.service.method(_interface, in_signature="b")
1137
def Approve(self, value):
1138
self.approve(value)
1139
1140
# CheckedOK - method
1141
@dbus.service.method(_interface)
1142
def CheckedOK(self):
1143
self.checked_ok()
524
# SetChecker - method
525
@dbus.service.method(_interface, in_signature="s")
526
def SetChecker(self, checker):
527
"D-Bus setter method"
528
self.checker_command = checker
529
# Emit D-Bus signal
530
self.PropertyChanged(dbus.String(u"checker"),
531
dbus.String(self.checker_command,
532
variant_level=1))
533
534
# SetHost - method
535
@dbus.service.method(_interface, in_signature="s")
536
def SetHost(self, host):
537
"D-Bus setter method"
538
self.host = host
539
# Emit D-Bus signal
540
self.PropertyChanged(dbus.String(u"host"),
541
dbus.String(self.host, variant_level=1))
542
543
# SetInterval - method
544
@dbus.service.method(_interface, in_signature="t")
545
def SetInterval(self, milliseconds):
546
self.interval = datetime.timedelta(0, 0, 0, milliseconds)
547
# Emit D-Bus signal
548
self.PropertyChanged(dbus.String(u"interval"),
549
(dbus.UInt64(self.interval_milliseconds(),
550
variant_level=1)))
551
552
# SetSecret - method
553
@dbus.service.method(_interface, in_signature="ay",
554
byte_arrays=True)
555
def SetSecret(self, secret):
556
"D-Bus setter method"
557
self.secret = str(secret)
558
559
# SetTimeout - method
560
@dbus.service.method(_interface, in_signature="t")
561
def SetTimeout(self, milliseconds):
562
self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
563
# Emit D-Bus signal
564
self.PropertyChanged(dbus.String(u"timeout"),
565
(dbus.UInt64(self.timeout_milliseconds(),
566
variant_level=1)))
1144
567
1145
568
# Enable - method
1146
@dbus.service.method(_interface)
1147
def Enable(self):
1148
"D-Bus method"
1149
self.enable()
569
Enable = dbus.service.method(_interface)(enable)
570
Enable.__name__ = "Enable"
1150
571
1151
572
# StartChecker - method
1152
573
@dbus.service.method(_interface)
1161
582
self.disable()
1162
583
1163
584
# StopChecker - method
1164
@dbus.service.method(_interface)
1165
def StopChecker(self):
1166
self.stop_checker()
1167
1168
## Properties
1169
1170
# ApprovalPending - property
1171
@dbus_service_property(_interface, signature="b", access="read")
1172
def ApprovalPending_dbus_property(self):
1173
return dbus.Boolean(bool(self.approvals_pending))
1174
1175
# ApprovedByDefault - property
1176
@dbus_service_property(_interface, signature="b",
1177
access="readwrite")
1178
def ApprovedByDefault_dbus_property(self, value=None):
1179
if value is None: # get
1180
return dbus.Boolean(self.approved_by_default)
1181
self.approved_by_default = bool(value)
1182
1183
# ApprovalDelay - property
1184
@dbus_service_property(_interface, signature="t",
1185
access="readwrite")
1186
def ApprovalDelay_dbus_property(self, value=None):
1187
if value is None: # get
1188
return dbus.UInt64(self.approval_delay_milliseconds())
1189
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1190
1191
# ApprovalDuration - property
1192
@dbus_service_property(_interface, signature="t",
1193
access="readwrite")
1194
def ApprovalDuration_dbus_property(self, value=None):
1195
if value is None: # get
1196
return dbus.UInt64(_timedelta_to_milliseconds(
1197
self.approval_duration))
1198
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1199
1200
# Name - property
1201
@dbus_service_property(_interface, signature="s", access="read")
1202
def Name_dbus_property(self):
1203
return dbus.String(self.name)
1204
1205
# Fingerprint - property
1206
@dbus_service_property(_interface, signature="s", access="read")
1207
def Fingerprint_dbus_property(self):
1208
return dbus.String(self.fingerprint)
1209
1210
# Host - property
1211
@dbus_service_property(_interface, signature="s",
1212
access="readwrite")
1213
def Host_dbus_property(self, value=None):
1214
if value is None: # get
1215
return dbus.String(self.host)
1216
self.host = value
1217
1218
# Created - property
1219
@dbus_service_property(_interface, signature="s", access="read")
1220
def Created_dbus_property(self):
1221
return dbus.String(datetime_to_dbus(self.created))
1222
1223
# LastEnabled - property
1224
@dbus_service_property(_interface, signature="s", access="read")
1225
def LastEnabled_dbus_property(self):
1226
return datetime_to_dbus(self.last_enabled)
1227
1228
# Enabled - property
1229
@dbus_service_property(_interface, signature="b",
1230
access="readwrite")
1231
def Enabled_dbus_property(self, value=None):
1232
if value is None: # get
1233
return dbus.Boolean(self.enabled)
1234
if value:
1235
self.enable()
1236
else:
1237
self.disable()
1238
1239
# LastCheckedOK - property
1240
@dbus_service_property(_interface, signature="s",
1241
access="readwrite")
1242
def LastCheckedOK_dbus_property(self, value=None):
1243
if value is not None:
1244
self.checked_ok()
1245
return
1246
return datetime_to_dbus(self.last_checked_ok)
1247
1248
# Expires - property
1249
@dbus_service_property(_interface, signature="s", access="read")
1250
def Expires_dbus_property(self):
1251
return datetime_to_dbus(self.expires)
1252
1253
# LastApprovalRequest - property
1254
@dbus_service_property(_interface, signature="s", access="read")
1255
def LastApprovalRequest_dbus_property(self):
1256
return datetime_to_dbus(self.last_approval_request)
1257
1258
# Timeout - property
1259
@dbus_service_property(_interface, signature="t",
1260
access="readwrite")
1261
def Timeout_dbus_property(self, value=None):
1262
if value is None: # get
1263
return dbus.UInt64(self.timeout_milliseconds())
1264
self.timeout = datetime.timedelta(0, 0, 0, value)
1265
if getattr(self, "disable_initiator_tag", None) is None:
1266
return
1267
# Reschedule timeout
1268
gobject.source_remove(self.disable_initiator_tag)
1269
self.disable_initiator_tag = None
1270
self.expires = None
1271
time_to_die = _timedelta_to_milliseconds((self
1272
.last_checked_ok
1273
+ self.timeout)
1274
- datetime.datetime
1275
.utcnow())
1276
if time_to_die <= 0:
1277
# The timeout has passed
1278
self.disable()
1279
else:
1280
self.expires = (datetime.datetime.utcnow()
1281
+ datetime.timedelta(milliseconds =
1282
time_to_die))
1283
self.disable_initiator_tag = (gobject.timeout_add
1284
(time_to_die, self.disable))
1285
1286
# ExtendedTimeout - property
1287
@dbus_service_property(_interface, signature="t",
1288
access="readwrite")
1289
def ExtendedTimeout_dbus_property(self, value=None):
1290
if value is None: # get
1291
return dbus.UInt64(self.extended_timeout_milliseconds())
1292
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1293
1294
# Interval - property
1295
@dbus_service_property(_interface, signature="t",
1296
access="readwrite")
1297
def Interval_dbus_property(self, value=None):
1298
if value is None: # get
1299
return dbus.UInt64(self.interval_milliseconds())
1300
self.interval = datetime.timedelta(0, 0, 0, value)
1301
if getattr(self, "checker_initiator_tag", None) is None:
1302
return
1303
# Reschedule checker run
1304
gobject.source_remove(self.checker_initiator_tag)
1305
self.checker_initiator_tag = (gobject.timeout_add
1306
(value, self.start_checker))
1307
self.start_checker() # Start one now, too
1308
1309
# Checker - property
1310
@dbus_service_property(_interface, signature="s",
1311
access="readwrite")
1312
def Checker_dbus_property(self, value=None):
1313
if value is None: # get
1314
return dbus.String(self.checker_command)
1315
self.checker_command = value
1316
1317
# CheckerRunning - property
1318
@dbus_service_property(_interface, signature="b",
1319
access="readwrite")
1320
def CheckerRunning_dbus_property(self, value=None):
1321
if value is None: # get
1322
return dbus.Boolean(self.checker is not None)
1323
if value:
1324
self.start_checker()
1325
else:
1326
self.stop_checker()
1327
1328
# ObjectPath - property
1329
@dbus_service_property(_interface, signature="o", access="read")
1330
def ObjectPath_dbus_property(self):
1331
return self.dbus_object_path # is already a dbus.ObjectPath
1332
1333
# Secret = property
1334
@dbus_service_property(_interface, signature="ay",
1335
access="write", byte_arrays=True)
1336
def Secret_dbus_property(self, value):
1337
self.secret = str(value)
585
StopChecker = dbus.service.method(_interface)(stop_checker)
586
StopChecker.__name__ = "StopChecker"
1338
587
1339
588
del _interface
1340
589
1341
590
1342
class ProxyClient(object):
1343
def __init__(self, child_pipe, fpr, address):
1344
self._pipe = child_pipe
1345
self._pipe.send(('init', fpr, address))
1346
if not self._pipe.recv():
1347
raise KeyError()
1348
1349
def __getattribute__(self, name):
1350
if(name == '_pipe'):
1351
return super(ProxyClient, self).__getattribute__(name)
1352
self._pipe.send(('getattr', name))
1353
data = self._pipe.recv()
1354
if data[0] == 'data':
1355
return data[1]
1356
if data[0] == 'function':
1357
def func(*args, **kwargs):
1358
self._pipe.send(('funcall', name, args, kwargs))
1359
return self._pipe.recv()[1]
1360
return func
1361
1362
def __setattr__(self, name, value):
1363
if(name == '_pipe'):
1364
return super(ProxyClient, self).__setattr__(name, value)
1365
self._pipe.send(('setattr', name, value))
1366
1367
class ClientDBusTransitional(ClientDBus):
1368
__metaclass__ = AlternateDBusNamesMetaclass
1369
1370
class ClientHandler(socketserver.BaseRequestHandler, object):
1371
"""A class to handle client connections.
1372
1373
Instantiated once for each connection to handle it.
591
def peer_certificate(session):
592
"Return the peer's OpenPGP certificate as a bytestring"
593
# If not an OpenPGP certificate...
594
if (gnutls.library.functions
595
.gnutls_certificate_type_get(session._c_object)
596
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
597
# ...do the normal thing
598
return session.peer_certificate
599
list_size = ctypes.c_uint(1)
600
cert_list = (gnutls.library.functions
601
.gnutls_certificate_get_peers
602
(session._c_object, ctypes.byref(list_size)))
603
if not bool(cert_list) and list_size.value != 0:
604
raise gnutls.errors.GNUTLSError("error getting peer"
605
" certificate")
606
if list_size.value == 0:
607
return None
608
cert = cert_list[0]
609
return ctypes.string_at(cert.data, cert.size)
610
611
612
def fingerprint(openpgp):
613
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
614
# New GnuTLS "datum" with the OpenPGP public key
615
datum = (gnutls.library.types
616
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
617
ctypes.POINTER
618
(ctypes.c_ubyte)),
619
ctypes.c_uint(len(openpgp))))
620
# New empty GnuTLS certificate
621
crt = gnutls.library.types.gnutls_openpgp_crt_t()
622
(gnutls.library.functions
623
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
624
# Import the OpenPGP public key into the certificate
625
(gnutls.library.functions
626
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
627
gnutls.library.constants
628
.GNUTLS_OPENPGP_FMT_RAW))
629
# Verify the self signature in the key
630
crtverify = ctypes.c_uint()
631
(gnutls.library.functions
632
.gnutls_openpgp_crt_verify_self(crt, 0, ctypes.byref(crtverify)))
633
if crtverify.value != 0:
634
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
635
raise gnutls.errors.CertificateSecurityError("Verify failed")
636
# New buffer for the fingerprint
637
buf = ctypes.create_string_buffer(20)
638
buf_len = ctypes.c_size_t()
639
# Get the fingerprint from the certificate into the buffer
640
(gnutls.library.functions
641
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
642
ctypes.byref(buf_len)))
643
# Deinit the certificate
644
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
645
# Convert the buffer to a Python bytestring
646
fpr = ctypes.string_at(buf, buf_len.value)
647
# Convert the bytestring to hexadecimal notation
648
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
649
return hex_fpr
650
651
652
class TCP_handler(SocketServer.BaseRequestHandler, object):
653
"""A TCP request handler class.
654
Instantiated by IPv6_TCPServer for each request to handle it.
1374
655
Note: This will run in its own forked process."""
1375
656
1376
657
def handle(self):
1377
with contextlib.closing(self.server.child_pipe) as child_pipe:
1378
logger.info("TCP connection from: %s",
1379
unicode(self.client_address))
1380
logger.debug("Pipe FD: %d",
1381
self.server.child_pipe.fileno())
1382
1383
session = (gnutls.connection
1384
.ClientSession(self.request,
1385
gnutls.connection
1386
.X509Credentials()))
1387
1388
# Note: gnutls.connection.X509Credentials is really a
1389
# generic GnuTLS certificate credentials object so long as
1390
# no X.509 keys are added to it. Therefore, we can use it
1391
# here despite using OpenPGP certificates.
1392
1393
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1394
# "+AES-256-CBC", "+SHA1",
1395
# "+COMP-NULL", "+CTYPE-OPENPGP",
1396
# "+DHE-DSS"))
1397
# Use a fallback default, since this MUST be set.
1398
priority = self.server.gnutls_priority
1399
if priority is None:
1400
priority = "NORMAL"
1401
(gnutls.library.functions
1402
.gnutls_priority_set_direct(session._c_object,
1403
priority, None))
1404
1405
# Start communication using the Mandos protocol
1406
# Get protocol number
1407
line = self.request.makefile().readline()
1408
logger.debug("Protocol version: %r", line)
1409
try:
1410
if int(line.strip().split()[0]) > 1:
1411
raise RuntimeError
1412
except (ValueError, IndexError, RuntimeError) as error:
1413
logger.error("Unknown protocol version: %s", error)
1414
return
1415
1416
# Start GnuTLS connection
1417
try:
1418
session.handshake()
1419
except gnutls.errors.GNUTLSError as error:
1420
logger.warning("Handshake failed: %s", error)
1421
# Do not run session.bye() here: the session is not
1422
# established. Just abandon the request.
1423
return
1424
logger.debug("Handshake succeeded")
1425
1426
approval_required = False
1427
try:
1428
try:
1429
fpr = self.fingerprint(self.peer_certificate
1430
(session))
1431
except (TypeError,
1432
gnutls.errors.GNUTLSError) as error:
1433
logger.warning("Bad certificate: %s", error)
1434
return
1435
logger.debug("Fingerprint: %s", fpr)
1436
if self.server.use_dbus:
1437
# Emit D-Bus signal
1438
client.NewRequest(str(self.client_address))
1439
1440
try:
1441
client = ProxyClient(child_pipe, fpr,
1442
self.client_address)
1443
except KeyError:
1444
return
1445
1446
if client.approval_delay:
1447
delay = client.approval_delay
1448
client.approvals_pending += 1
1449
approval_required = True
1450
1451
while True:
1452
if not client.enabled:
1453
logger.info("Client %s is disabled",
1454
client.name)
1455
if self.server.use_dbus:
1456
# Emit D-Bus signal
1457
client.Rejected("Disabled")
1458
return
1459
1460
if client._approved or not client.approval_delay:
1461
#We are approved or approval is disabled
1462
break
1463
elif client._approved is None:
1464
logger.info("Client %s needs approval",
1465
client.name)
1466
if self.server.use_dbus:
1467
# Emit D-Bus signal
1468
client.NeedApproval(
1469
client.approval_delay_milliseconds(),
1470
client.approved_by_default)
1471
else:
1472
logger.warning("Client %s was not approved",
1473
client.name)
1474
if self.server.use_dbus:
1475
# Emit D-Bus signal
1476
client.Rejected("Denied")
1477
return
1478
1479
#wait until timeout or approved
1480
time = datetime.datetime.now()
1481
client.changedstate.acquire()
1482
(client.changedstate.wait
1483
(float(client._timedelta_to_milliseconds(delay)
1484
/ 1000)))
1485
client.changedstate.release()
1486
time2 = datetime.datetime.now()
1487
if (time2 - time) >= delay:
1488
if not client.approved_by_default:
1489
logger.warning("Client %s timed out while"
1490
" waiting for approval",
1491
client.name)
1492
if self.server.use_dbus:
1493
# Emit D-Bus signal
1494
client.Rejected("Approval timed out")
1495
return
1496
else:
1497
break
1498
else:
1499
delay -= time2 - time
1500
1501
sent_size = 0
1502
while sent_size < len(client.secret):
1503
try:
1504
sent = session.send(client.secret[sent_size:])
1505
except gnutls.errors.GNUTLSError as error:
1506
logger.warning("gnutls send failed")
1507
return
1508
logger.debug("Sent: %d, remaining: %d",
1509
sent, len(client.secret)
1510
- (sent_size + sent))
1511
sent_size += sent
1512
1513
logger.info("Sending secret to %s", client.name)
1514
# bump the timeout using extended_timeout
1515
client.checked_ok(client.extended_timeout)
1516
if self.server.use_dbus:
1517
# Emit D-Bus signal
1518
client.GotSecret()
1519
1520
finally:
1521
if approval_required:
1522
client.approvals_pending -= 1
1523
try:
1524
session.bye()
1525
except gnutls.errors.GNUTLSError as error:
1526
logger.warning("GnuTLS bye failed")
1527
1528
@staticmethod
1529
def peer_certificate(session):
1530
"Return the peer's OpenPGP certificate as a bytestring"
1531
# If not an OpenPGP certificate...
1532
if (gnutls.library.functions
1533
.gnutls_certificate_type_get(session._c_object)
1534
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1535
# ...do the normal thing
1536
return session.peer_certificate
1537
list_size = ctypes.c_uint(1)
1538
cert_list = (gnutls.library.functions
1539
.gnutls_certificate_get_peers
1540
(session._c_object, ctypes.byref(list_size)))
1541
if not bool(cert_list) and list_size.value != 0:
1542
raise gnutls.errors.GNUTLSError("error getting peer"
1543
" certificate")
1544
if list_size.value == 0:
1545
return None
1546
cert = cert_list[0]
1547
return ctypes.string_at(cert.data, cert.size)
1548
1549
@staticmethod
1550
def fingerprint(openpgp):
1551
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1552
# New GnuTLS "datum" with the OpenPGP public key
1553
datum = (gnutls.library.types
1554
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1555
ctypes.POINTER
1556
(ctypes.c_ubyte)),
1557
ctypes.c_uint(len(openpgp))))
1558
# New empty GnuTLS certificate
1559
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1560
(gnutls.library.functions
1561
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1562
# Import the OpenPGP public key into the certificate
1563
(gnutls.library.functions
1564
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1565
gnutls.library.constants
1566
.GNUTLS_OPENPGP_FMT_RAW))
1567
# Verify the self signature in the key
1568
crtverify = ctypes.c_uint()
1569
(gnutls.library.functions
1570
.gnutls_openpgp_crt_verify_self(crt, 0,
1571
ctypes.byref(crtverify)))
1572
if crtverify.value != 0:
1573
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1574
raise (gnutls.errors.CertificateSecurityError
1575
("Verify failed"))
1576
# New buffer for the fingerprint
1577
buf = ctypes.create_string_buffer(20)
1578
buf_len = ctypes.c_size_t()
1579
# Get the fingerprint from the certificate into the buffer
1580
(gnutls.library.functions
1581
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1582
ctypes.byref(buf_len)))
1583
# Deinit the certificate
1584
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1585
# Convert the buffer to a Python bytestring
1586
fpr = ctypes.string_at(buf, buf_len.value)
1587
# Convert the bytestring to hexadecimal notation
1588
hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
1589
return hex_fpr
1590
1591
1592
class MultiprocessingMixIn(object):
1593
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1594
def sub_process_main(self, request, address):
1595
try:
1596
self.finish_request(request, address)
1597
except:
1598
self.handle_error(request, address)
1599
self.close_request(request)
1600
1601
def process_request(self, request, address):
1602
"""Start a new process to process the request."""
1603
proc = multiprocessing.Process(target = self.sub_process_main,
1604
args = (request,
1605
address))
1606
proc.start()
1607
return proc
1608
1609
1610
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1611
""" adds a pipe to the MixIn """
1612
def process_request(self, request, client_address):
1613
"""Overrides and wraps the original process_request().
1614
1615
This function creates a new pipe in self.pipe
1616
"""
1617
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1618
1619
proc = MultiprocessingMixIn.process_request(self, request,
1620
client_address)
1621
self.child_pipe.close()
1622
self.add_pipe(parent_pipe, proc)
1623
1624
def add_pipe(self, parent_pipe, proc):
1625
"""Dummy function; override as necessary"""
1626
raise NotImplementedError
1627
1628
1629
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1630
socketserver.TCPServer, object):
1631
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1632
658
logger.info(u"TCP connection from: %s",
659
unicode(self.client_address))
660
session = (gnutls.connection
661
.ClientSession(self.request,
662
gnutls.connection
663
.X509Credentials()))
664
665
line = self.request.makefile().readline()
666
logger.debug(u"Protocol version: %r", line)
667
try:
668
if int(line.strip().split()[0]) > 1:
669
raise RuntimeError
670
except (ValueError, IndexError, RuntimeError), error:
671
logger.error(u"Unknown protocol version: %s", error)
672
return
673
674
# Note: gnutls.connection.X509Credentials is really a generic
675
# GnuTLS certificate credentials object so long as no X.509
676
# keys are added to it. Therefore, we can use it here despite
677
# using OpenPGP certificates.
678
679
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
680
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
681
# "+DHE-DSS"))
682
# Use a fallback default, since this MUST be set.
683
priority = self.server.settings.get("priority", "NORMAL")
684
(gnutls.library.functions
685
.gnutls_priority_set_direct(session._c_object,
686
priority, None))
687
688
try:
689
session.handshake()
690
except gnutls.errors.GNUTLSError, error:
691
logger.warning(u"Handshake failed: %s", error)
692
# Do not run session.bye() here: the session is not
693
# established. Just abandon the request.
694
return
695
logger.debug(u"Handshake succeeded")
696
try:
697
fpr = fingerprint(peer_certificate(session))
698
except (TypeError, gnutls.errors.GNUTLSError), error:
699
logger.warning(u"Bad certificate: %s", error)
700
session.bye()
701
return
702
logger.debug(u"Fingerprint: %s", fpr)
703
704
for c in self.server.clients:
705
if c.fingerprint == fpr:
706
client = c
707
break
708
else:
709
logger.warning(u"Client not found for fingerprint: %s",
710
fpr)
711
session.bye()
712
return
713
# Have to check if client.still_valid(), since it is possible
714
# that the client timed out while establishing the GnuTLS
715
# session.
716
if not client.still_valid():
717
logger.warning(u"Client %(name)s is invalid",
718
vars(client))
719
session.bye()
720
return
721
## This won't work here, since we're in a fork.
722
# client.checked_ok()
723
sent_size = 0
724
while sent_size < len(client.secret):
725
sent = session.send(client.secret[sent_size:])
726
logger.debug(u"Sent: %d, remaining: %d",
727
sent, len(client.secret)
728
- (sent_size + sent))
729
sent_size += sent
730
session.bye()
731
732
733
class IPv6_TCPServer(SocketServer.ForkingMixIn,
734
SocketServer.TCPServer, object):
735
"""IPv6 TCP server. Accepts 'None' as address and/or port.
1633
736
Attributes:
737
settings: Server settings
738
clients: Set() of Client objects
1634
739
enabled: Boolean; whether this server is activated yet
1635
interface: None or a network interface name (string)
1636
use_ipv6: Boolean; to use IPv6 or not
1637
740
"""
1638
def __init__(self, server_address, RequestHandlerClass,
1639
interface=None, use_ipv6=True):
1640
self.interface = interface
1641
if use_ipv6:
1642
self.address_family = socket.AF_INET6
1643
socketserver.TCPServer.__init__(self, server_address,
1644
RequestHandlerClass)
741
address_family = socket.AF_INET6
742
def __init__(self, *args, **kwargs):
743
if "settings" in kwargs:
744
self.settings = kwargs["settings"]
745
del kwargs["settings"]
746
if "clients" in kwargs:
747
self.clients = kwargs["clients"]
748
del kwargs["clients"]
749
self.enabled = False
750
super(IPv6_TCPServer, self).__init__(*args, **kwargs)
1645
751
def server_bind(self):
1646
752
"""This overrides the normal server_bind() function
1647
753
to bind to an interface if one was specified, and also NOT to
1648
754
bind to an address or port if they were not specified."""
1649
if self.interface is not None:
1650
if SO_BINDTODEVICE is None:
1651
logger.error("SO_BINDTODEVICE does not exist;"
1652
" cannot bind to interface %s",
1653
self.interface)
1654
else:
1655
try:
1656
self.socket.setsockopt(socket.SOL_SOCKET,
1657
SO_BINDTODEVICE,
1658
str(self.interface
1659
+ '\0'))
1660
except socket.error as error:
1661
if error[0] == errno.EPERM:
1662
logger.error("No permission to"
1663
" bind to interface %s",
1664
self.interface)
1665
elif error[0] == errno.ENOPROTOOPT:
1666
logger.error("SO_BINDTODEVICE not available;"
1667
" cannot bind to interface %s",
1668
self.interface)
1669
else:
1670
raise
755
if self.settings["interface"]:
756
# 25 is from /usr/include/asm-i486/socket.h
757
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
758
try:
759
self.socket.setsockopt(socket.SOL_SOCKET,
760
SO_BINDTODEVICE,
761
self.settings["interface"])
762
except socket.error, error:
763
if error[0] == errno.EPERM:
764
logger.error(u"No permission to"
765
u" bind to interface %s",
766
self.settings["interface"])
767
else:
768
raise
1671
769
# Only bind(2) the socket if we really need to.
1672
770
if self.server_address[0] or self.server_address[1]:
1673
771
if not self.server_address[0]:
1674
if self.address_family == socket.AF_INET6:
1675
any_address = "::" # in6addr_any
1676
else:
1677
any_address = socket.INADDR_ANY
1678
self.server_address = (any_address,
772
in6addr_any = "::"
773
self.server_address = (in6addr_any,
1679
774
self.server_address[1])
1680
775
elif not self.server_address[1]:
1681
776
self.server_address = (self.server_address[0],
1682
777
0)
1683
# if self.interface:
778
# if self.settings["interface"]:
1684
779
# self.server_address = (self.server_address[0],
1685
780
# 0, # port
1686
781
# 0, # flowinfo
1687
782
# if_nametoindex
1688
# (self.interface))
1689
return socketserver.TCPServer.server_bind(self)
1690
1691
1692
class MandosServer(IPv6_TCPServer):
1693
"""Mandos server.
1694
1695
Attributes:
1696
clients: set of Client objects
1697
gnutls_priority GnuTLS priority string
1698
use_dbus: Boolean; to emit D-Bus signals or not
1699
1700
Assumes a gobject.MainLoop event loop.
1701
"""
1702
def __init__(self, server_address, RequestHandlerClass,
1703
interface=None, use_ipv6=True, clients=None,
1704
gnutls_priority=None, use_dbus=True):
1705
self.enabled = False
1706
self.clients = clients
1707
if self.clients is None:
1708
self.clients = {}
1709
self.use_dbus = use_dbus
1710
self.gnutls_priority = gnutls_priority
1711
IPv6_TCPServer.__init__(self, server_address,
1712
RequestHandlerClass,
1713
interface = interface,
1714
use_ipv6 = use_ipv6)
783
# (self.settings
784
# ["interface"]))
785
return super(IPv6_TCPServer, self).server_bind()
1715
786
def server_activate(self):
1716
787
if self.enabled:
1717
return socketserver.TCPServer.server_activate(self)
1718
788
return super(IPv6_TCPServer, self).server_activate()
1719
789
def enable(self):
1720
790
self.enabled = True
1721
1722
def add_pipe(self, parent_pipe, proc):
1723
# Call "handle_ipc" for both data and EOF events
1724
gobject.io_add_watch(parent_pipe.fileno(),
1725
gobject.IO_IN | gobject.IO_HUP,
1726
functools.partial(self.handle_ipc,
1727
parent_pipe =
1728
parent_pipe,
1729
proc = proc))
1730
1731
def handle_ipc(self, source, condition, parent_pipe=None,
1732
proc = None, client_object=None):
1733
condition_names = {
1734
gobject.IO_IN: "IN", # There is data to read.
1735
gobject.IO_OUT: "OUT", # Data can be written (without
1736
# blocking).
1737
gobject.IO_PRI: "PRI", # There is urgent data to read.
1738
gobject.IO_ERR: "ERR", # Error condition.
1739
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1740
# broken, usually for pipes and
1741
# sockets).
1742
}
1743
conditions_string = ' | '.join(name
1744
for cond, name in
1745
condition_names.iteritems()
1746
if cond & condition)
1747
# error, or the other end of multiprocessing.Pipe has closed
1748
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
1749
# Wait for other process to exit
1750
proc.join()
1751
return False
1752
1753
# Read a request from the child
1754
request = parent_pipe.recv()
1755
command = request[0]
1756
1757
if command == 'init':
1758
fpr = request[1]
1759
address = request[2]
1760
1761
for c in self.clients.itervalues():
1762
if c.fingerprint == fpr:
1763
client = c
1764
break
1765
else:
1766
logger.info("Client not found for fingerprint: %s, ad"
1767
"dress: %s", fpr, address)
1768
if self.use_dbus:
1769
# Emit D-Bus signal
1770
mandos_dbus_service.ClientNotFound(fpr,
1771
address[0])
1772
parent_pipe.send(False)
1773
return False
1774
1775
gobject.io_add_watch(parent_pipe.fileno(),
1776
gobject.IO_IN | gobject.IO_HUP,
1777
functools.partial(self.handle_ipc,
1778
parent_pipe =
1779
parent_pipe,
1780
proc = proc,
1781
client_object =
1782
client))
1783
parent_pipe.send(True)
1784
# remove the old hook in favor of the new above hook on
1785
# same fileno
1786
return False
1787
if command == 'funcall':
1788
funcname = request[1]
1789
args = request[2]
1790
kwargs = request[3]
1791
1792
parent_pipe.send(('data', getattr(client_object,
1793
funcname)(*args,
1794
**kwargs)))
1795
1796
if command == 'getattr':
1797
attrname = request[1]
1798
if callable(client_object.__getattribute__(attrname)):
1799
parent_pipe.send(('function',))
1800
else:
1801
parent_pipe.send(('data', client_object
1802
.__getattribute__(attrname)))
1803
1804
if command == 'setattr':
1805
attrname = request[1]
1806
value = request[2]
1807
setattr(client_object, attrname, value)
1808
1809
return True
1810
791
1811
792
1812
793
def string_to_delta(interval):
1820
801
datetime.timedelta(0, 3600)
1821
802
>>> string_to_delta('24h')
1822
803
datetime.timedelta(1)
1823
>>> string_to_delta('1w')
804
>>> string_to_delta(u'1w')
1824
805
datetime.timedelta(7)
1825
806
>>> string_to_delta('5m 30s')
1826
807
datetime.timedelta(0, 330)
1830
811
try:
1831
812
suffix = unicode(s[-1])
1832
813
value = int(s[:-1])
1833
if suffix == "d":
814
if suffix == u"d":
1834
815
delta = datetime.timedelta(value)
1835
elif suffix == "s":
816
elif suffix == u"s":
1836
817
delta = datetime.timedelta(0, value)
1837
elif suffix == "m":
818
elif suffix == u"m":
1838
819
delta = datetime.timedelta(0, 0, 0, 0, value)
1839
elif suffix == "h":
820
elif suffix == u"h":
1840
821
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
1841
elif suffix == "w":
822
elif suffix == u"w":
1842
823
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1843
824
else:
1844
raise ValueError("Unknown suffix %r" % suffix)
1845
except (ValueError, IndexError) as e:
1846
raise ValueError(*(e.args))
825
raise ValueError
826
except (ValueError, IndexError):
827
raise ValueError
1847
828
timevalue += delta
1848
829
return timevalue
1849
830
1850
831
832
def server_state_changed(state):
833
"""Derived from the Avahi example code"""
834
if state == avahi.SERVER_COLLISION:
835
logger.error(u"Zeroconf server name collision")
836
service.remove()
837
elif state == avahi.SERVER_RUNNING:
838
service.add()
839
840
841
def entry_group_state_changed(state, error):
842
"""Derived from the Avahi example code"""
843
logger.debug(u"Avahi state change: %i", state)
844
845
if state == avahi.ENTRY_GROUP_ESTABLISHED:
846
logger.debug(u"Zeroconf service established.")
847
elif state == avahi.ENTRY_GROUP_COLLISION:
848
logger.warning(u"Zeroconf service name collision.")
849
service.rename()
850
elif state == avahi.ENTRY_GROUP_FAILURE:
851
logger.critical(u"Avahi: Error in group state changed %s",
852
unicode(error))
853
raise AvahiGroupError(u"State changed: %s" % unicode(error))
854
1851
855
def if_nametoindex(interface):
1852
"""Call the C function if_nametoindex(), or equivalent
1853
1854
Note: This function cannot accept a unicode string."""
856
"""Call the C function if_nametoindex(), or equivalent"""
1855
857
global if_nametoindex
1856
858
try:
1857
859
if_nametoindex = (ctypes.cdll.LoadLibrary
1858
860
(ctypes.util.find_library("c"))
1859
861
.if_nametoindex)
1860
862
except (OSError, AttributeError):
1861
logger.warning("Doing if_nametoindex the hard way")
863
if "struct" not in sys.modules:
864
import struct
865
if "fcntl" not in sys.modules:
866
import fcntl
1862
867
def if_nametoindex(interface):
1863
868
"Get an interface index the hard way, i.e. using fcntl()"
1864
869
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1865
with contextlib.closing(socket.socket()) as s:
870
with closing(socket.socket()) as s:
1866
871
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1867
struct.pack(str("16s16x"),
1868
interface))
1869
interface_index = struct.unpack(str("I"),
1870
ifreq[16:20])[0]
872
struct.pack("16s16x", interface))
873
interface_index = struct.unpack("I", ifreq[16:20])[0]
1871
874
return interface_index
1872
875
return if_nametoindex(interface)
1873
876
1874
877
1875
878
def daemon(nochdir = False, noclose = False):
1876
879
"""See daemon(3). Standard BSD Unix function.
1877
1878
880
This should really exist as os.daemon, but it doesn't (yet)."""
1879
881
if os.fork():
1880
882
sys.exit()
1888
890
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1889
891
if not stat.S_ISCHR(os.fstat(null).st_mode):
1890
892
raise OSError(errno.ENODEV,
1891
"%s not a character device"
1892
% os.path.devnull)
893
"/dev/null not a character device")
1893
894
os.dup2(null, sys.stdin.fileno())
1894
895
os.dup2(null, sys.stdout.fileno())
1895
896
os.dup2(null, sys.stderr.fileno())
1898
899
1899
900
1900
901
def main():
1901
1902
##################################################################
1903
# Parsing of options, both command line and config file
1904
1905
parser = argparse.ArgumentParser()
1906
parser.add_argument("-v", "--version", action="version",
1907
version = "%%(prog)s %s" % version,
1908
help="show version number and exit")
1909
parser.add_argument("-i", "--interface", metavar="IF",
1910
help="Bind to interface IF")
1911
parser.add_argument("-a", "--address",
1912
help="Address to listen for requests on")
1913
parser.add_argument("-p", "--port", type=int,
1914
help="Port number to receive requests on")
1915
parser.add_argument("--check", action="store_true",
1916
help="Run self-test")
1917
parser.add_argument("--debug", action="store_true",
1918
help="Debug mode; run in foreground and log"
1919
" to terminal")
1920
parser.add_argument("--debuglevel", metavar="LEVEL",
1921
help="Debug level for stdout output")
1922
parser.add_argument("--priority", help="GnuTLS"
1923
" priority string (see GnuTLS documentation)")
1924
parser.add_argument("--servicename",
1925
metavar="NAME", help="Zeroconf service name")
1926
parser.add_argument("--configdir",
1927
default="/etc/mandos", metavar="DIR",
1928
help="Directory to search for configuration"
1929
" files")
1930
parser.add_argument("--no-dbus", action="store_false",
1931
dest="use_dbus", help="Do not provide D-Bus"
1932
" system bus interface")
1933
parser.add_argument("--no-ipv6", action="store_false",
1934
dest="use_ipv6", help="Do not use IPv6")
1935
parser.add_argument("--no-restore", action="store_false",
1936
dest="restore", help="Do not restore stored state",
1937
default=True)
1938
1939
options = parser.parse_args()
902
parser = optparse.OptionParser(version = "%%prog %s" % version)
903
parser.add_option("-i", "--interface", type="string",
904
metavar="IF", help="Bind to interface IF")
905
parser.add_option("-a", "--address", type="string",
906
help="Address to listen for requests on")
907
parser.add_option("-p", "--port", type="int",
908
help="Port number to receive requests on")
909
parser.add_option("--check", action="store_true",
910
help="Run self-test")
911
parser.add_option("--debug", action="store_true",
912
help="Debug mode; run in foreground and log to"
913
" terminal")
914
parser.add_option("--priority", type="string", help="GnuTLS"
915
" priority string (see GnuTLS documentation)")
916
parser.add_option("--servicename", type="string", metavar="NAME",
917
help="Zeroconf service name")
918
parser.add_option("--configdir", type="string",
919
default="/etc/mandos", metavar="DIR",
920
help="Directory to search for configuration"
921
" files")
922
parser.add_option("--no-dbus", action="store_false",
923
dest="use_dbus",
924
help="Do not provide D-Bus system bus"
925
" interface")
926
options = parser.parse_args()[0]
1940
927
1941
928
if options.check:
1942
929
import doctest
1952
939
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1953
940
"servicename": "Mandos",
1954
941
"use_dbus": "True",
1955
"use_ipv6": "True",
1956
"debuglevel": "",
1957
942
}
1958
943
1959
944
# Parse config file for server-global settings
1960
server_config = configparser.SafeConfigParser(server_defaults)
945
server_config = ConfigParser.SafeConfigParser(server_defaults)
1961
946
del server_defaults
1962
server_config.read(os.path.join(options.configdir,
1963
"mandos.conf"))
947
server_config.read(os.path.join(options.configdir, "mandos.conf"))
1964
948
# Convert the SafeConfigParser object to a dict
1965
949
server_settings = server_config.defaults()
1966
950
# Use the appropriate methods on the non-string config options
1967
for option in ("debug", "use_dbus", "use_ipv6"):
1968
server_settings[option] = server_config.getboolean("DEFAULT",
1969
option)
951
server_settings["debug"] = server_config.getboolean("DEFAULT",
952
"debug")
953
server_settings["use_dbus"] = server_config.getboolean("DEFAULT",
954
"use_dbus")
1970
955
if server_settings["port"]:
1971
956
server_settings["port"] = server_config.getint("DEFAULT",
1972
957
"port")
1976
961
# options, if set.
1977
962
for option in ("interface", "address", "port", "debug",
1978
963
"priority", "servicename", "configdir",
1979
"use_dbus", "use_ipv6", "debuglevel", "restore"):
964
"use_dbus"):
1980
965
value = getattr(options, option)
1981
966
if value is not None:
1982
967
server_settings[option] = value
1983
968
del options
1984
# Force all strings to be unicode
1985
for option in server_settings.keys():
1986
if type(server_settings[option]) is str:
1987
server_settings[option] = unicode(server_settings[option])
1988
969
# Now we have our good server settings in "server_settings"
1989
970
1990
##################################################################
1991
1992
971
# For convenience
1993
972
debug = server_settings["debug"]
1994
debuglevel = server_settings["debuglevel"]
1995
973
use_dbus = server_settings["use_dbus"]
1996
use_ipv6 = server_settings["use_ipv6"]
974
975
if not debug:
976
syslogger.setLevel(logging.WARNING)
977
console.setLevel(logging.WARNING)
1997
978
1998
979
if server_settings["servicename"] != "Mandos":
1999
980
syslogger.setFormatter(logging.Formatter
2000
('Mandos (%s) [%%(process)d]:'
2001
' %%(levelname)s: %%(message)s'
981
('Mandos (%s): %%(levelname)s:'
982
' %%(message)s'
2002
983
% server_settings["servicename"]))
2003
984
2004
985
# Parse config file with clients
2005
client_defaults = { "timeout": "5m",
2006
"extended_timeout": "15m",
2007
"interval": "2m",
986
client_defaults = { "timeout": "1h",
987
"interval": "5m",
2008
988
"checker": "fping -q -- %%(host)s",
2009
989
"host": "",
2010
"approval_delay": "0s",
2011
"approval_duration": "1s",
2012
990
}
2013
client_config = configparser.SafeConfigParser(client_defaults)
991
client_config = ConfigParser.SafeConfigParser(client_defaults)
2014
992
client_config.read(os.path.join(server_settings["configdir"],
2015
993
"clients.conf"))
2016
994
2017
global mandos_dbus_service
2018
mandos_dbus_service = None
2019
2020
tcp_server = MandosServer((server_settings["address"],
2021
server_settings["port"]),
2022
ClientHandler,
2023
interface=(server_settings["interface"]
2024
or None),
2025
use_ipv6=use_ipv6,
2026
gnutls_priority=
2027
server_settings["priority"],
2028
use_dbus=use_dbus)
2029
if not debug:
2030
pidfilename = "/var/run/mandos.pid"
2031
try:
2032
pidfile = open(pidfilename, "w")
2033
except IOError:
2034
logger.error("Could not open file %r", pidfilename)
995
clients = Set()
996
tcp_server = IPv6_TCPServer((server_settings["address"],
997
server_settings["port"]),
998
TCP_handler,
999
settings=server_settings,
1000
clients=clients)
1001
pidfilename = "/var/run/mandos.pid"
1002
try:
1003
pidfile = open(pidfilename, "w")
1004
except IOError:
1005
logger.error("Could not open file %r", pidfilename)
2035
1006
2036
1007
try:
2037
1008
uid = pwd.getpwnam("_mandos").pw_uid
2043
1014
except KeyError:
2044
1015
try:
2045
1016
uid = pwd.getpwnam("nobody").pw_uid
2046
gid = pwd.getpwnam("nobody").pw_gid
1017
gid = pwd.getpwnam("nogroup").pw_gid
2047
1018
except KeyError:
2048
1019
uid = 65534
2049
1020
gid = 65534
2050
1021
try:
2051
1022
os.setgid(gid)
2052
1023
os.setuid(uid)
2053
except OSError as error:
1024
except OSError, error:
2054
1025
if error[0] != errno.EPERM:
2055
1026
raise error
2056
1027
2057
if not debug and not debuglevel:
2058
logger.setLevel(logging.WARNING)
2059
if debuglevel:
2060
level = getattr(logging, debuglevel.upper())
2061
logger.setLevel(level)
2062
1028
# Enable all possible GnuTLS debugging
2063
1029
if debug:
2064
logger.setLevel(logging.DEBUG)
2065
# Enable all possible GnuTLS debugging
2066
2067
1030
# "Use a log level over 10 to enable all debugging options."
2068
1031
# - GnuTLS manual
2069
1032
gnutls.library.functions.gnutls_global_set_log_level(11)
2074
1037
2075
1038
(gnutls.library.functions
2076
1039
.gnutls_global_set_log_function(debug_gnutls))
2077
1040
1041
global service
1042
service = AvahiService(name = server_settings["servicename"],
1043
servicetype = "_mandos._tcp", )
1044
if server_settings["interface"]:
1045
service.interface = (if_nametoindex
1046
(server_settings["interface"]))
1047
1048
global main_loop
1049
global bus
1050
global server
1051
# From the Avahi example code
1052
DBusGMainLoop(set_as_default=True )
1053
main_loop = gobject.MainLoop()
1054
bus = dbus.SystemBus()
1055
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
1056
avahi.DBUS_PATH_SERVER),
1057
avahi.DBUS_INTERFACE_SERVER)
1058
# End of Avahi example code
1059
if use_dbus:
1060
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
1061
1062
clients.update(Set(Client(name = section,
1063
config
1064
= dict(client_config.items(section)),
1065
use_dbus = use_dbus)
1066
for section in client_config.sections()))
1067
if not clients:
1068
logger.warning(u"No clients defined")
1069
1070
if debug:
2078
1071
# Redirect stdin so all checkers get /dev/null
2079
1072
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2080
1073
os.dup2(null, sys.stdin.fileno())
2083
1076
else:
2084
1077
# No console logging
2085
1078
logger.removeHandler(console)
2086
2087
# Need to fork before connecting to D-Bus
2088
if not debug:
2089
1079
# Close all input and output, do double fork, etc.
2090
1080
daemon()
2091
1081
2092
global main_loop
2093
# From the Avahi example code
2094
DBusGMainLoop(set_as_default=True )
2095
main_loop = gobject.MainLoop()
2096
bus = dbus.SystemBus()
2097
# End of Avahi example code
2098
if use_dbus:
2099
try:
2100
bus_name = dbus.service.BusName("se.recompile.Mandos",
2101
bus, do_not_queue=True)
2102
old_bus_name = (dbus.service.BusName
2103
("se.bsnet.fukt.Mandos", bus,
2104
do_not_queue=True))
2105
except dbus.exceptions.NameExistsException as e:
2106
logger.error(unicode(e) + ", disabling D-Bus")
2107
use_dbus = False
2108
server_settings["use_dbus"] = False
2109
tcp_server.use_dbus = False
2110
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2111
service = AvahiServiceToSyslog(name =
2112
server_settings["servicename"],
2113
servicetype = "_mandos._tcp",
2114
protocol = protocol, bus = bus)
2115
if server_settings["interface"]:
2116
service.interface = (if_nametoindex
2117
(str(server_settings["interface"])))
2118
2119
global multiprocessing_manager
2120
multiprocessing_manager = multiprocessing.Manager()
2121
2122
client_class = Client
2123
if use_dbus:
2124
client_class = functools.partial(ClientDBusTransitional,
2125
bus = bus)
2126
2127
special_settings = {
2128
# Some settings need to be accessd by special methods;
2129
# booleans need .getboolean(), etc. Here is a list of them:
2130
"approved_by_default":
2131
lambda section:
2132
client_config.getboolean(section, "approved_by_default"),
2133
}
2134
# Construct a new dict of client settings of this form:
2135
# { client_name: {setting_name: value, ...}, ...}
2136
# with exceptions for any special settings as defined above
2137
client_settings = dict((clientname,
2138
dict((setting,
2139
(value if setting not in special_settings
2140
else special_settings[setting](clientname)))
2141
for setting, value in client_config.items(clientname)))
2142
for clientname in client_config.sections())
2143
2144
old_client_settings = {}
2145
clients_data = []
2146
2147
# Get client data and settings from last running state.
2148
if server_settings["restore"]:
2149
try:
2150
with open(stored_state_path, "rb") as stored_state:
2151
clients_data, old_client_settings = pickle.load(stored_state)
2152
os.remove(stored_state_path)
2153
except IOError as e:
2154
logger.warning("Could not load persistant state: {0}".format(e))
2155
if e.errno != errno.ENOENT:
2156
raise
2157
2158
for client in clients_data:
2159
client_name = client["name"]
2160
2161
# Decide which value to use after restoring saved state.
2162
# We have three different values: Old config file,
2163
# new config file, and saved state.
2164
# New config value takes precedence if it differs from old
2165
# config value, otherwise use saved state.
2166
for name, value in client_settings[client_name].items():
2167
try:
2168
# For each value in new config, check if it differs
2169
# from the old config value (Except for the "secret"
2170
# attribute)
2171
if name != "secret" and value != old_client_settings[client_name][name]:
2172
setattr(client, name, value)
2173
except KeyError:
2174
pass
2175
2176
# Clients who has passed its expire date, can still be enabled if its
2177
# last checker was sucessful. Clients who checkers failed before we
2178
# stored it state is asumed to had failed checker during downtime.
2179
if client["enabled"] and client["last_checked_ok"]:
2180
if ((datetime.datetime.utcnow() - client["last_checked_ok"])
2181
> client["interval"]):
2182
if client["last_checker_status"] != 0:
2183
client["enabled"] = False
2184
else:
2185
client["expires"] = datetime.datetime.utcnow() + client["timeout"]
2186
2187
client["changedstate"] = (multiprocessing_manager
2188
.Condition(multiprocessing_manager
2189
.Lock()))
2190
if use_dbus:
2191
new_client = ClientDBusTransitional.__new__(ClientDBusTransitional)
2192
tcp_server.clients[client_name] = new_client
2193
new_client.bus = bus
2194
for name, value in client.iteritems():
2195
setattr(new_client, name, value)
2196
client_object_name = unicode(client_name).translate(
2197
{ord("."): ord("_"),
2198
ord("-"): ord("_")})
2199
new_client.dbus_object_path = (dbus.ObjectPath
2200
("/clients/" + client_object_name))
2201
DBusObjectWithProperties.__init__(new_client,
2202
new_client.bus,
2203
new_client.dbus_object_path)
2204
else:
2205
tcp_server.clients[client_name] = Client.__new__(Client)
2206
for name, value in client.iteritems():
2207
setattr(tcp_server.clients[client_name], name, value)
2208
2209
tcp_server.clients[client_name].decrypt_secret(
2210
client_settings[client_name]["secret"])
2211
2212
# Create/remove clients based on new changes made to config
2213
for clientname in set(old_client_settings) - set(client_settings):
2214
del tcp_server.clients[clientname]
2215
for clientname in set(client_settings) - set(old_client_settings):
2216
tcp_server.clients[clientname] = (client_class(name = clientname,
2217
config =
2218
client_settings
2219
[clientname]))
2220
2221
2222
if not tcp_server.clients:
2223
logger.warning("No clients defined")
2224
1082
try:
1083
pid = os.getpid()
1084
pidfile.write(str(pid) + "\n")
1085
pidfile.close()
1086
del pidfile
1087
except IOError:
1088
logger.error(u"Could not write to file %r with PID %d",
1089
pidfilename, pid)
1090
except NameError:
1091
# "pidfile" was never created
1092
pass
1093
del pidfilename
1094
1095
def cleanup():
1096
"Cleanup function; run on exit"
1097
global group
1098
# From the Avahi example code
1099
if not group is None:
1100
group.Free()
1101
group = None
1102
# End of Avahi example code
1103
1104
while clients:
1105
client = clients.pop()
1106
client.disable_hook = None
1107
client.disable()
1108
1109
atexit.register(cleanup)
1110
2225
1111
if not debug:
2226
try:
2227
with pidfile:
2228
pid = os.getpid()
2229
pidfile.write(str(pid) + "\n".encode("utf-8"))
2230
del pidfile
2231
except IOError:
2232
logger.error("Could not write to file %r with PID %d",
2233
pidfilename, pid)
2234
except NameError:
2235
# "pidfile" was never created
2236
pass
2237
del pidfilename
2238
2239
1112
signal.signal(signal.SIGINT, signal.SIG_IGN)
2240
2241
1113
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2242
1114
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2243
1115
2244
1116
if use_dbus:
2245
class MandosDBusService(dbus.service.Object):
1117
class MandosServer(dbus.service.Object):
2246
1118
"""A D-Bus proxy object"""
2247
1119
def __init__(self):
2248
1120
dbus.service.Object.__init__(self, bus, "/")
2249
_interface = "se.recompile.Mandos"
2250
2251
@dbus.service.signal(_interface, signature="o")
2252
def ClientAdded(self, objpath):
2253
"D-Bus signal"
2254
pass
2255
2256
@dbus.service.signal(_interface, signature="ss")
2257
def ClientNotFound(self, fingerprint, address):
1121
_interface = u"se.bsnet.fukt.Mandos"
1122
1123
@dbus.service.signal(_interface, signature="oa{sv}")
1124
def ClientAdded(self, objpath, properties):
2258
1125
"D-Bus signal"
2259
1126
pass
2260
1127
2266
1133
@dbus.service.method(_interface, out_signature="ao")
2267
1134
def GetAllClients(self):
2268
1135
"D-Bus method"
2269
return dbus.Array(c.dbus_object_path
2270
for c in
2271
tcp_server.clients.itervalues())
1136
return dbus.Array(c.dbus_object_path for c in clients)
2272
1137
2273
@dbus.service.method(_interface,
2274
out_signature="a{oa{sv}}")
1138
@dbus.service.method(_interface, out_signature="a{oa{sv}}")
2275
1139
def GetAllClientsWithProperties(self):
2276
1140
"D-Bus method"
2277
1141
return dbus.Dictionary(
2278
((c.dbus_object_path, c.GetAll(""))
2279
for c in tcp_server.clients.itervalues()),
1142
((c.dbus_object_path, c.GetAllProperties())
1143
for c in clients),
2280
1144
signature="oa{sv}")
2281
1145
2282
1146
@dbus.service.method(_interface, in_signature="o")
2283
1147
def RemoveClient(self, object_path):
2284
1148
"D-Bus method"
2285
for c in tcp_server.clients.itervalues():
1149
for c in clients:
2286
1150
if c.dbus_object_path == object_path:
2287
del tcp_server.clients[c.name]
2288
c.remove_from_connection()
1151
clients.remove(c)
2289
1152
# Don't signal anything except ClientRemoved
2290
c.disable(quiet=True)
1153
c.use_dbus = False
1154
c.disable()
2291
1155
# Emit D-Bus signal
2292
1156
self.ClientRemoved(object_path, c.name)
2293
1157
return
2294
raise KeyError(object_path)
1158
raise KeyError
2295
1159
2296
1160
del _interface
2297
1161
2298
class MandosDBusServiceTransitional(MandosDBusService):
2299
__metaclass__ = AlternateDBusNamesMetaclass
2300
mandos_dbus_service = MandosDBusServiceTransitional()
2301
2302
def cleanup():
2303
"Cleanup function; run on exit"
2304
service.cleanup()
2305
2306
multiprocessing.active_children()
2307
if not (tcp_server.clients or client_settings):
2308
return
2309
2310
# Store client before exiting. Secrets are encrypted with key based
2311
# on what config file has. If config file is removed/edited, old
2312
# secret will thus be unrecovable.
2313
clients = []
2314
for client in tcp_server.clients.itervalues():
2315
client.encrypt_secret(client_settings[client.name]["secret"])
2316
2317
client_dict = {}
2318
2319
# A list of attributes that will not be stored when shuting down.
2320
exclude = set(("bus", "changedstate", "secret"))
2321
for name, typ in inspect.getmembers(dbus.service.Object):
2322
exclude.add(name)
2323
2324
client_dict["encrypted_secret"] = client.encrypted_secret
2325
for attr in client.client_structure:
2326
if attr not in exclude:
2327
client_dict[attr] = getattr(client, attr)
2328
2329
clients.append(client_dict)
2330
del client_settings[client.name]["secret"]
2331
2332
try:
2333
with os.fdopen(os.open(stored_state_path, os.O_CREAT|os.O_WRONLY|os.O_TRUNC, 0600), "wb") as stored_state:
2334
pickle.dump((clients, client_settings), stored_state)
2335
except IOError as e:
2336
logger.warning("Could not save persistant state: {0}".format(e))
2337
if e.errno != errno.ENOENT:
2338
raise
2339
2340
# Delete all clients, and settings from config
2341
while tcp_server.clients:
2342
name, client = tcp_server.clients.popitem()
2343
if use_dbus:
2344
client.remove_from_connection()
2345
# Don't signal anything except ClientRemoved
2346
client.disable(quiet=True)
2347
if use_dbus:
2348
# Emit D-Bus signal
2349
mandos_dbus_service.ClientRemoved(client
2350
.dbus_object_path,
2351
client.name)
2352
client_settings.clear()
2353
2354
atexit.register(cleanup)
2355
2356
for client in tcp_server.clients.itervalues():
1162
mandos_server = MandosServer()
1163
1164
for client in clients:
2357
1165
if use_dbus:
2358
1166
# Emit D-Bus signal
2359
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2360
# Need to initiate checking of clients
2361
if client.enabled:
2362
client.init_checker()
2363
1167
mandos_server.ClientAdded(client.dbus_object_path,
1168
client.GetAllProperties())
1169
client.enable()
2364
1170
2365
1171
tcp_server.enable()
2366
1172
tcp_server.server_activate()
2367
1173
2368
1174
# Find out what port we got
2369
1175
service.port = tcp_server.socket.getsockname()[1]
2370
if use_ipv6:
2371
logger.info("Now listening on address %r, port %d,"
2372
" flowinfo %d, scope_id %d"
2373
% tcp_server.socket.getsockname())
2374
else: # IPv4
2375
logger.info("Now listening on address %r, port %d"
2376
% tcp_server.socket.getsockname())
1176
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
1177
u" scope_id %d" % tcp_server.socket.getsockname())
2377
1178
2378
1179
#service.interface = tcp_server.socket.getsockname()[3]
2379
1180
2380
1181
try:
2381
1182
# From the Avahi example code
1183
server.connect_to_signal("StateChanged", server_state_changed)
2382
1184
try:
2383
service.activate()
2384
except dbus.exceptions.DBusException as error:
2385
logger.critical("DBusException: %s", error)
2386
cleanup()
1185
server_state_changed(server.GetState())
1186
except dbus.exceptions.DBusException, error:
1187
logger.critical(u"DBusException: %s", error)
2387
1188
sys.exit(1)
2388
1189
# End of Avahi example code
2389
1190
2392
1193
(tcp_server.handle_request
2393
1194
(*args[2:], **kwargs) or True))
2394
1195
2395
logger.debug("Starting main loop")
1196
logger.debug(u"Starting main loop")
2396
1197
main_loop.run()
2397
except AvahiError as error:
2398
logger.critical("AvahiError: %s", error)
2399
cleanup()
1198
except AvahiError, error:
1199
logger.critical(u"AvahiError: %s", error)
2400
1200
sys.exit(1)
2401
1201
except KeyboardInterrupt:
2402
1202
if debug:
2403
print("", file=sys.stderr)
1203
print >> sys.stderr
2404
1204
logger.debug("Server received KeyboardInterrupt")
2405
1205
logger.debug("Server exiting")
2406
# Must run before the D-Bus bus name gets deregistered
2407
cleanup()
2408
2409
1206
2410
1207
if __name__ == '__main__':
2411
1208
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0