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- Committer: Björn Påhlsson
- Date: 2008-08-11 16:35:32 UTC
- mto: (24.1.154 mandos) (237.4.3 mandos-release)
- mto: This revision was merged to the branch mainline in revision 66.
- Revision ID: belorn@braxen-20080811163532-er1zd4q2j4ykfv11
Fixed fallback on error in mandos-client
fixed a bug in password-request
fixed a bug in password-request
- files added:
- network-protocol.txt
- files removed:
- .bzr-builddeb
- debian
- debian/po
- debian/source
- network-hooks.d
- files renamed:
- plugin-runner.c => mandos-client.c
- plugin-runner.xml => mandos-client.xml
- plugins.d/mandos-client.c => plugins.d/password-request.c
- plugins.d/mandos-client.xml => plugins.d/password-request.xml
- files modified:
- Makefile
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".
12
12
#
13
13
# Everything else is
14
# Copyright © 2008-2011 Teddy Hogeborn
15
# Copyright © 2008-2011 Björn Påhlsson
14
# Copyright © 2007-2008 Teddy Hogeborn & Björn Påhlsson
16
15
#
17
16
# This program is free software: you can redistribute it and/or modify
18
17
# it under the terms of the GNU General Public License as published by
25
24
# GNU General Public License for more details.
26
25
#
27
26
# You should have received a copy of the GNU General Public License
28
# along with this program. If not, see
29
# <http://www.gnu.org/licenses/>.
30
#
31
# Contact the authors at <mandos@recompile.se>.
32
#
33
34
from __future__ import (division, absolute_import, print_function,
35
unicode_literals)
36
37
import SocketServer as socketserver
27
# along with this program. If not, see <http://www.gnu.org/licenses/>.
28
#
29
# Contact the authors at <mandos@fukt.bsnet.se>.
30
#
31
32
from __future__ import division
33
34
import SocketServer
38
35
import socket
39
import argparse
36
import select
37
from optparse import OptionParser
40
38
import datetime
41
39
import errno
42
40
import gnutls.crypto
45
43
import gnutls.library.functions
46
44
import gnutls.library.constants
47
45
import gnutls.library.types
48
import ConfigParser as configparser
46
import ConfigParser
49
47
import sys
50
48
import re
51
49
import os
52
50
import signal
51
from sets import Set
53
52
import subprocess
54
53
import atexit
55
54
import stat
56
55
import logging
57
56
import logging.handlers
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 binascii
67
import tempfile
68
57
69
58
import dbus
70
import dbus.service
71
59
import gobject
72
60
import avahi
73
61
from dbus.mainloop.glib import DBusGMainLoop
74
62
import ctypes
75
import ctypes.util
76
import xml.dom.minidom
77
import inspect
78
import GnuPGInterface
79
80
try:
81
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
82
except AttributeError:
83
try:
84
from IN import SO_BINDTODEVICE
85
except ImportError:
86
SO_BINDTODEVICE = None
87
88
version = "1.4.1"
89
stored_state_file = "clients.pickle"
90
91
logger = logging.getLogger()
92
syslogger = (logging.handlers.SysLogHandler
93
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
94
address = str("/dev/log")))
95
96
try:
97
if_nametoindex = (ctypes.cdll.LoadLibrary
98
(ctypes.util.find_library("c"))
99
.if_nametoindex)
100
except (OSError, AttributeError):
101
def if_nametoindex(interface):
102
"Get an interface index the hard way, i.e. using fcntl()"
103
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
104
with contextlib.closing(socket.socket()) as s:
105
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
106
struct.pack(str("16s16x"),
107
interface))
108
interface_index = struct.unpack(str("I"),
109
ifreq[16:20])[0]
110
return interface_index
111
112
113
def initlogger(level=logging.WARNING):
114
"""init logger and add loglevel"""
115
116
syslogger.setFormatter(logging.Formatter
117
('Mandos [%(process)d]: %(levelname)s:'
118
' %(message)s'))
119
logger.addHandler(syslogger)
120
121
console = logging.StreamHandler()
122
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
123
' [%(process)d]:'
124
' %(levelname)s:'
125
' %(message)s'))
126
logger.addHandler(console)
127
logger.setLevel(level)
128
129
130
class PGPError(Exception):
131
"""Exception if encryption/decryption fails"""
132
pass
133
134
135
class PGPEngine(object):
136
"""A simple class for OpenPGP symmetric encryption & decryption"""
137
def __init__(self):
138
self.gnupg = GnuPGInterface.GnuPG()
139
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
140
self.gnupg = GnuPGInterface.GnuPG()
141
self.gnupg.options.meta_interactive = False
142
self.gnupg.options.homedir = self.tempdir
143
self.gnupg.options.extra_args.extend(['--force-mdc',
144
'--quiet'])
145
146
def __enter__(self):
147
return self
148
149
def __exit__ (self, exc_type, exc_value, traceback):
150
self._cleanup()
151
return False
152
153
def __del__(self):
154
self._cleanup()
155
156
def _cleanup(self):
157
if self.tempdir is not None:
158
# Delete contents of tempdir
159
for root, dirs, files in os.walk(self.tempdir,
160
topdown = False):
161
for filename in files:
162
os.remove(os.path.join(root, filename))
163
for dirname in dirs:
164
os.rmdir(os.path.join(root, dirname))
165
# Remove tempdir
166
os.rmdir(self.tempdir)
167
self.tempdir = None
168
169
def password_encode(self, password):
170
# Passphrase can not be empty and can not contain newlines or
171
# NUL bytes. So we prefix it and hex encode it.
172
return b"mandos" + binascii.hexlify(password)
173
174
def encrypt(self, data, password):
175
self.gnupg.passphrase = self.password_encode(password)
176
with open(os.devnull) as devnull:
177
try:
178
proc = self.gnupg.run(['--symmetric'],
179
create_fhs=['stdin', 'stdout'],
180
attach_fhs={'stderr': devnull})
181
with contextlib.closing(proc.handles['stdin']) as f:
182
f.write(data)
183
with contextlib.closing(proc.handles['stdout']) as f:
184
ciphertext = f.read()
185
proc.wait()
186
except IOError as e:
187
raise PGPError(e)
188
self.gnupg.passphrase = None
189
return ciphertext
190
191
def decrypt(self, data, password):
192
self.gnupg.passphrase = self.password_encode(password)
193
with open(os.devnull) as devnull:
194
try:
195
proc = self.gnupg.run(['--decrypt'],
196
create_fhs=['stdin', 'stdout'],
197
attach_fhs={'stderr': devnull})
198
with contextlib.closing(proc.handles['stdin'] ) as f:
199
f.write(data)
200
with contextlib.closing(proc.handles['stdout']) as f:
201
decrypted_plaintext = f.read()
202
proc.wait()
203
except IOError as e:
204
raise PGPError(e)
205
self.gnupg.passphrase = None
206
return decrypted_plaintext
207
208
63
64
version = "1.0"
65
66
logger = logging.Logger('mandos')
67
syslogger = logging.handlers.SysLogHandler\
68
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
69
address = "/dev/log")
70
syslogger.setFormatter(logging.Formatter\
71
('Mandos: %(levelname)s: %(message)s'))
72
logger.addHandler(syslogger)
73
74
console = logging.StreamHandler()
75
console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
76
' %(message)s'))
77
logger.addHandler(console)
209
78
210
79
class AvahiError(Exception):
211
def __init__(self, value, *args, **kwargs):
80
def __init__(self, value):
212
81
self.value = value
213
super(AvahiError, self).__init__(value, *args, **kwargs)
214
def __unicode__(self):
215
return unicode(repr(self.value))
82
def __str__(self):
83
return repr(self.value)
216
84
217
85
class AvahiServiceError(AvahiError):
218
86
pass
223
91
224
92
class AvahiService(object):
225
93
"""An Avahi (Zeroconf) service.
226
227
94
Attributes:
228
95
interface: integer; avahi.IF_UNSPEC or an interface index.
229
96
Used to optionally bind to the specified interface.
237
104
max_renames: integer; maximum number of renames
238
105
rename_count: integer; counter so we only rename after collisions
239
106
a sensible number of times
240
group: D-Bus Entry Group
241
server: D-Bus Server
242
bus: dbus.SystemBus()
243
107
"""
244
108
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
245
servicetype = None, port = None, TXT = None,
246
domain = "", host = "", max_renames = 32768,
247
protocol = avahi.PROTO_UNSPEC, bus = None):
109
type = None, port = None, TXT = None, domain = "",
110
host = "", max_renames = 32768):
248
111
self.interface = interface
249
112
self.name = name
250
self.type = servicetype
113
self.type = type
251
114
self.port = port
252
self.TXT = TXT if TXT is not None else []
115
if TXT is None:
116
self.TXT = []
117
else:
118
self.TXT = TXT
253
119
self.domain = domain
254
120
self.host = host
255
121
self.rename_count = 0
256
self.max_renames = max_renames
257
self.protocol = protocol
258
self.group = None # our entry group
259
self.server = None
260
self.bus = bus
261
self.entry_group_state_changed_match = None
262
122
def rename(self):
263
123
"""Derived from the Avahi example code"""
264
124
if self.rename_count >= self.max_renames:
265
logger.critical("No suitable Zeroconf service name found"
266
" after %i retries, exiting.",
267
self.rename_count)
125
logger.critical(u"No suitable service name found after %i"
126
u" retries, exiting.", rename_count)
268
127
raise AvahiServiceError("Too many renames")
269
self.name = unicode(self.server
270
.GetAlternativeServiceName(self.name))
271
logger.info("Changing Zeroconf service name to %r ...",
272
self.name)
128
name = server.GetAlternativeServiceName(name)
129
logger.error(u"Changing name to %r ...", name)
130
syslogger.setFormatter(logging.Formatter\
131
('Mandos (%s): %%(levelname)s:'
132
' %%(message)s' % name))
273
133
self.remove()
274
try:
275
self.add()
276
except dbus.exceptions.DBusException as error:
277
logger.critical("DBusException: %s", error)
278
self.cleanup()
279
os._exit(1)
134
self.add()
280
135
self.rename_count += 1
281
136
def remove(self):
282
137
"""Derived from the Avahi example code"""
283
if self.entry_group_state_changed_match is not None:
284
self.entry_group_state_changed_match.remove()
285
self.entry_group_state_changed_match = None
286
if self.group is not None:
287
self.group.Reset()
138
if group is not None:
139
group.Reset()
288
140
def add(self):
289
141
"""Derived from the Avahi example code"""
290
self.remove()
291
if self.group is None:
292
self.group = dbus.Interface(
293
self.bus.get_object(avahi.DBUS_NAME,
294
self.server.EntryGroupNew()),
295
avahi.DBUS_INTERFACE_ENTRY_GROUP)
296
self.entry_group_state_changed_match = (
297
self.group.connect_to_signal(
298
'StateChanged', self.entry_group_state_changed))
299
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
300
self.name, self.type)
301
self.group.AddService(
302
self.interface,
303
self.protocol,
304
dbus.UInt32(0), # flags
305
self.name, self.type,
306
self.domain, self.host,
307
dbus.UInt16(self.port),
308
avahi.string_array_to_txt_array(self.TXT))
309
self.group.Commit()
310
def entry_group_state_changed(self, state, error):
311
"""Derived from the Avahi example code"""
312
logger.debug("Avahi entry group state change: %i", state)
313
314
if state == avahi.ENTRY_GROUP_ESTABLISHED:
315
logger.debug("Zeroconf service established.")
316
elif state == avahi.ENTRY_GROUP_COLLISION:
317
logger.info("Zeroconf service name collision.")
318
self.rename()
319
elif state == avahi.ENTRY_GROUP_FAILURE:
320
logger.critical("Avahi: Error in group state changed %s",
321
unicode(error))
322
raise AvahiGroupError("State changed: %s"
323
% unicode(error))
324
def cleanup(self):
325
"""Derived from the Avahi example code"""
326
if self.group is not None:
327
try:
328
self.group.Free()
329
except (dbus.exceptions.UnknownMethodException,
330
dbus.exceptions.DBusException):
331
pass
332
self.group = None
333
self.remove()
334
def server_state_changed(self, state, error=None):
335
"""Derived from the Avahi example code"""
336
logger.debug("Avahi server state change: %i", state)
337
bad_states = { avahi.SERVER_INVALID:
338
"Zeroconf server invalid",
339
avahi.SERVER_REGISTERING: None,
340
avahi.SERVER_COLLISION:
341
"Zeroconf server name collision",
342
avahi.SERVER_FAILURE:
343
"Zeroconf server failure" }
344
if state in bad_states:
345
if bad_states[state] is not None:
346
if error is None:
347
logger.error(bad_states[state])
348
else:
349
logger.error(bad_states[state] + ": %r", error)
350
self.cleanup()
351
elif state == avahi.SERVER_RUNNING:
352
self.add()
353
else:
354
if error is None:
355
logger.debug("Unknown state: %r", state)
356
else:
357
logger.debug("Unknown state: %r: %r", state, error)
358
def activate(self):
359
"""Derived from the Avahi example code"""
360
if self.server is None:
361
self.server = dbus.Interface(
362
self.bus.get_object(avahi.DBUS_NAME,
363
avahi.DBUS_PATH_SERVER,
364
follow_name_owner_changes=True),
365
avahi.DBUS_INTERFACE_SERVER)
366
self.server.connect_to_signal("StateChanged",
367
self.server_state_changed)
368
self.server_state_changed(self.server.GetState())
369
370
class AvahiServiceToSyslog(AvahiService):
371
def rename(self):
372
"""Add the new name to the syslog messages"""
373
ret = AvahiService.rename(self)
374
syslogger.setFormatter(logging.Formatter
375
('Mandos (%s) [%%(process)d]:'
376
' %%(levelname)s: %%(message)s'
377
% self.name))
378
return ret
379
380
def timedelta_to_milliseconds(td):
381
"Convert a datetime.timedelta() to milliseconds"
382
return ((td.days * 24 * 60 * 60 * 1000)
383
+ (td.seconds * 1000)
384
+ (td.microseconds // 1000))
385
142
global group
143
if group is None:
144
group = dbus.Interface\
145
(bus.get_object(avahi.DBUS_NAME,
146
server.EntryGroupNew()),
147
avahi.DBUS_INTERFACE_ENTRY_GROUP)
148
group.connect_to_signal('StateChanged',
149
entry_group_state_changed)
150
logger.debug(u"Adding service '%s' of type '%s' ...",
151
service.name, service.type)
152
group.AddService(
153
self.interface, # interface
154
avahi.PROTO_INET6, # protocol
155
dbus.UInt32(0), # flags
156
self.name, self.type,
157
self.domain, self.host,
158
dbus.UInt16(self.port),
159
avahi.string_array_to_txt_array(self.TXT))
160
group.Commit()
161
162
# From the Avahi example code:
163
group = None # our entry group
164
# End of Avahi example code
165
166
386
167
class Client(object):
387
168
"""A representation of a client host served by this server.
388
389
169
Attributes:
390
approved: bool(); 'None' if not yet approved/disapproved
391
approval_delay: datetime.timedelta(); Time to wait for approval
392
approval_duration: datetime.timedelta(); Duration of one approval
393
checker: subprocess.Popen(); a running checker process used
394
to see if the client lives.
395
'None' if no process is running.
396
checker_callback_tag: a gobject event source tag, or None
397
checker_command: string; External command which is run to check
398
if client lives. %() expansions are done at
170
name: string; from the config file, used in log messages
171
fingerprint: string (40 or 32 hexadecimal digits); used to
172
uniquely identify the client
173
secret: bytestring; sent verbatim (over TLS) to client
174
host: string; available for use by the checker command
175
created: datetime.datetime(); object creation, not client host
176
last_checked_ok: datetime.datetime() or None if not yet checked OK
177
timeout: datetime.timedelta(); How long from last_checked_ok
178
until this client is invalid
179
interval: datetime.timedelta(); How often to start a new checker
180
stop_hook: If set, called by stop() as stop_hook(self)
181
checker: subprocess.Popen(); a running checker process used
182
to see if the client lives.
183
'None' if no process is running.
184
checker_initiator_tag: a gobject event source tag, or None
185
stop_initiator_tag: - '' -
186
checker_callback_tag: - '' -
187
checker_command: string; External command which is run to check if
188
client lives. %() expansions are done at
399
189
runtime with vars(self) as dict, so that for
400
190
instance %(name)s can be used in the command.
401
checker_initiator_tag: a gobject event source tag, or None
402
created: datetime.datetime(); (UTC) object creation
403
client_structure: Object describing what attributes a client has
404
and is used for storing the client at exit
405
current_checker_command: string; current running checker_command
406
disable_initiator_tag: a gobject event source tag, or None
407
enabled: bool()
408
fingerprint: string (40 or 32 hexadecimal digits); used to
409
uniquely identify the client
410
host: string; available for use by the checker command
411
interval: datetime.timedelta(); How often to start a new checker
412
last_approval_request: datetime.datetime(); (UTC) or None
413
last_checked_ok: datetime.datetime(); (UTC) or None
414
last_checker_status: integer between 0 and 255 reflecting exit
415
status of last checker. -1 reflects crashed
416
checker, or None.
417
last_enabled: datetime.datetime(); (UTC) or None
418
name: string; from the config file, used in log messages and
419
D-Bus identifiers
420
secret: bytestring; sent verbatim (over TLS) to client
421
timeout: datetime.timedelta(); How long from last_checked_ok
422
until this client is disabled
423
extended_timeout: extra long timeout when password has been sent
424
runtime_expansions: Allowed attributes for runtime expansion.
425
expires: datetime.datetime(); time (UTC) when a client will be
426
disabled, or None
191
Private attibutes:
192
_timeout: Real variable for 'timeout'
193
_interval: Real variable for 'interval'
194
_timeout_milliseconds: Used when calling gobject.timeout_add()
195
_interval_milliseconds: - '' -
427
196
"""
428
429
runtime_expansions = ("approval_delay", "approval_duration",
430
"created", "enabled", "fingerprint",
431
"host", "interval", "last_checked_ok",
432
"last_enabled", "name", "timeout")
433
client_defaults = { "timeout": "5m",
434
"extended_timeout": "15m",
435
"interval": "2m",
436
"checker": "fping -q -- %%(host)s",
437
"host": "",
438
"approval_delay": "0s",
439
"approval_duration": "1s",
440
"approved_by_default": "True",
441
"enabled": "True",
442
}
443
444
def timeout_milliseconds(self):
445
"Return the 'timeout' attribute in milliseconds"
446
return timedelta_to_milliseconds(self.timeout)
447
448
def extended_timeout_milliseconds(self):
449
"Return the 'extended_timeout' attribute in milliseconds"
450
return timedelta_to_milliseconds(self.extended_timeout)
451
452
def interval_milliseconds(self):
453
"Return the 'interval' attribute in milliseconds"
454
return timedelta_to_milliseconds(self.interval)
455
456
def approval_delay_milliseconds(self):
457
return timedelta_to_milliseconds(self.approval_delay)
458
459
@staticmethod
460
def config_parser(config):
461
""" Construct a new dict of client settings of this form:
462
{ client_name: {setting_name: value, ...}, ...}
463
with exceptions for any special settings as defined above"""
464
settings = {}
465
for client_name in config.sections():
466
section = dict(config.items(client_name))
467
client = settings[client_name] = {}
468
469
client["host"] = section["host"]
470
# Reformat values from string types to Python types
471
client["approved_by_default"] = config.getboolean(
472
client_name, "approved_by_default")
473
client["enabled"] = config.getboolean(client_name, "enabled")
474
475
client["fingerprint"] = (section["fingerprint"].upper()
476
.replace(" ", ""))
477
if "secret" in section:
478
client["secret"] = section["secret"].decode("base64")
479
elif "secfile" in section:
480
with open(os.path.expanduser(os.path.expandvars
481
(section["secfile"])),
482
"rb") as secfile:
483
client["secret"] = secfile.read()
484
else:
485
raise TypeError("No secret or secfile for section %s"
486
% section)
487
client["timeout"] = string_to_delta(section["timeout"])
488
client["extended_timeout"] = string_to_delta(
489
section["extended_timeout"])
490
client["interval"] = string_to_delta(section["interval"])
491
client["approval_delay"] = string_to_delta(
492
section["approval_delay"])
493
client["approval_duration"] = string_to_delta(
494
section["approval_duration"])
495
client["checker_command"] = section["checker"]
496
client["last_approval_request"] = None
497
client["last_checked_ok"] = None
498
client["last_checker_status"] = None
499
if client["enabled"]:
500
client["last_enabled"] = datetime.datetime.utcnow()
501
client["expires"] = (datetime.datetime.utcnow()
502
+ client["timeout"])
503
else:
504
client["last_enabled"] = None
505
client["expires"] = None
506
507
return settings
508
509
510
def __init__(self, settings, name = None):
197
def _set_timeout(self, timeout):
198
"Setter function for 'timeout' attribute"
199
self._timeout = timeout
200
self._timeout_milliseconds = ((self.timeout.days
201
* 24 * 60 * 60 * 1000)
202
+ (self.timeout.seconds * 1000)
203
+ (self.timeout.microseconds
204
// 1000))
205
timeout = property(lambda self: self._timeout,
206
_set_timeout)
207
del _set_timeout
208
def _set_interval(self, interval):
209
"Setter function for 'interval' attribute"
210
self._interval = interval
211
self._interval_milliseconds = ((self.interval.days
212
* 24 * 60 * 60 * 1000)
213
+ (self.interval.seconds
214
* 1000)
215
+ (self.interval.microseconds
216
// 1000))
217
interval = property(lambda self: self._interval,
218
_set_interval)
219
del _set_interval
220
def __init__(self, name = None, stop_hook=None, config={}):
511
221
"""Note: the 'checker' key in 'config' sets the
512
222
'checker_command' attribute and *not* the 'checker'
513
223
attribute."""
514
224
self.name = name
515
# adding all client settings
516
for setting, value in settings.iteritems():
517
setattr(self, setting, value)
518
519
logger.debug("Creating client %r", self.name)
225
logger.debug(u"Creating client %r", self.name)
520
226
# Uppercase and remove spaces from fingerprint for later
521
227
# comparison purposes with return value from the fingerprint()
522
228
# function
523
logger.debug(" Fingerprint: %s", self.fingerprint)
524
self.created = settings.get("created", datetime.datetime.utcnow())
525
526
# attributes specific for this server instance
229
self.fingerprint = config["fingerprint"].upper()\
230
.replace(u" ", u"")
231
logger.debug(u" Fingerprint: %s", self.fingerprint)
232
if "secret" in config:
233
self.secret = config["secret"].decode(u"base64")
234
elif "secfile" in config:
235
sf = open(config["secfile"])
236
self.secret = sf.read()
237
sf.close()
238
else:
239
raise TypeError(u"No secret or secfile for client %s"
240
% self.name)
241
self.host = config.get("host", "")
242
self.created = datetime.datetime.now()
243
self.last_checked_ok = None
244
self.timeout = string_to_delta(config["timeout"])
245
self.interval = string_to_delta(config["interval"])
246
self.stop_hook = stop_hook
527
247
self.checker = None
528
248
self.checker_initiator_tag = None
529
self.disable_initiator_tag = None
249
self.stop_initiator_tag = None
530
250
self.checker_callback_tag = None
531
self.current_checker_command = None
532
self.approved = None
533
self.approvals_pending = 0
534
self.changedstate = (multiprocessing_manager
535
.Condition(multiprocessing_manager
536
.Lock()))
537
self.client_structure = [attr for attr in
538
self.__dict__.iterkeys()
539
if not attr.startswith("_")]
540
self.client_structure.append("client_structure")
541
542
for name, t in inspect.getmembers(type(self),
543
lambda obj:
544
isinstance(obj,
545
property)):
546
if not name.startswith("_"):
547
self.client_structure.append(name)
548
549
# Send notice to process children that client state has changed
550
def send_changedstate(self):
551
with self.changedstate:
552
self.changedstate.notify_all()
553
554
def enable(self):
251
self.check_command = config["checker"]
252
def start(self):
555
253
"""Start this client's checker and timeout hooks"""
556
if getattr(self, "enabled", False):
557
# Already enabled
558
return
559
self.send_changedstate()
560
self.expires = datetime.datetime.utcnow() + self.timeout
561
self.enabled = True
562
self.last_enabled = datetime.datetime.utcnow()
563
self.init_checker()
564
565
def disable(self, quiet=True):
566
"""Disable this client."""
567
if not getattr(self, "enabled", False):
254
# Schedule a new checker to be started an 'interval' from now,
255
# and every interval from then on.
256
self.checker_initiator_tag = gobject.timeout_add\
257
(self._interval_milliseconds,
258
self.start_checker)
259
# Also start a new checker *right now*.
260
self.start_checker()
261
# Schedule a stop() when 'timeout' has passed
262
self.stop_initiator_tag = gobject.timeout_add\
263
(self._timeout_milliseconds,
264
self.stop)
265
def stop(self):
266
"""Stop this client.
267
The possibility that a client might be restarted is left open,
268
but not currently used."""
269
# If this client doesn't have a secret, it is already stopped.
270
if hasattr(self, "secret") and self.secret:
271
logger.info(u"Stopping client %s", self.name)
272
self.secret = None
273
else:
568
274
return False
569
if not quiet:
570
self.send_changedstate()
571
if not quiet:
572
logger.info("Disabling client %s", self.name)
573
if getattr(self, "disable_initiator_tag", False):
574
gobject.source_remove(self.disable_initiator_tag)
575
self.disable_initiator_tag = None
576
self.expires = None
275
if getattr(self, "stop_initiator_tag", False):
276
gobject.source_remove(self.stop_initiator_tag)
277
self.stop_initiator_tag = None
577
278
if getattr(self, "checker_initiator_tag", False):
578
279
gobject.source_remove(self.checker_initiator_tag)
579
280
self.checker_initiator_tag = None
580
281
self.stop_checker()
581
self.enabled = False
282
if self.stop_hook:
283
self.stop_hook(self)
582
284
# Do not run this again if called by a gobject.timeout_add
583
285
return False
584
585
286
def __del__(self):
586
self.disable()
587
588
def init_checker(self):
589
# Schedule a new checker to be started an 'interval' from now,
590
# and every interval from then on.
591
self.checker_initiator_tag = (gobject.timeout_add
592
(self.interval_milliseconds(),
593
self.start_checker))
594
# Schedule a disable() when 'timeout' has passed
595
self.disable_initiator_tag = (gobject.timeout_add
596
(self.timeout_milliseconds(),
597
self.disable))
598
# Also start a new checker *right now*.
599
self.start_checker()
600
601
def checker_callback(self, pid, condition, command):
287
self.stop_hook = None
288
self.stop()
289
def checker_callback(self, pid, condition):
602
290
"""The checker has completed, so take appropriate actions."""
291
now = datetime.datetime.now()
603
292
self.checker_callback_tag = None
604
293
self.checker = None
605
if os.WIFEXITED(condition):
606
self.last_checker_status = os.WEXITSTATUS(condition)
607
if self.last_checker_status == 0:
608
logger.info("Checker for %(name)s succeeded",
609
vars(self))
610
self.checked_ok()
611
else:
612
logger.info("Checker for %(name)s failed",
613
vars(self))
614
else:
615
self.last_checker_status = -1
616
logger.warning("Checker for %(name)s crashed?",
294
if os.WIFEXITED(condition) \
295
and (os.WEXITSTATUS(condition) == 0):
296
logger.info(u"Checker for %(name)s succeeded",
297
vars(self))
298
self.last_checked_ok = now
299
gobject.source_remove(self.stop_initiator_tag)
300
self.stop_initiator_tag = gobject.timeout_add\
301
(self._timeout_milliseconds,
302
self.stop)
303
elif not os.WIFEXITED(condition):
304
logger.warning(u"Checker for %(name)s crashed?",
617
305
vars(self))
618
619
def checked_ok(self, timeout=None):
620
"""Bump up the timeout for this client.
621
622
This should only be called when the client has been seen,
623
alive and well.
624
"""
625
if timeout is None:
626
timeout = self.timeout
627
self.last_checked_ok = datetime.datetime.utcnow()
628
if self.disable_initiator_tag is not None:
629
gobject.source_remove(self.disable_initiator_tag)
630
if getattr(self, "enabled", False):
631
self.disable_initiator_tag = (gobject.timeout_add
632
(timedelta_to_milliseconds
633
(timeout), self.disable))
634
self.expires = datetime.datetime.utcnow() + timeout
635
636
def need_approval(self):
637
self.last_approval_request = datetime.datetime.utcnow()
638
306
else:
307
logger.info(u"Checker for %(name)s failed",
308
vars(self))
639
309
def start_checker(self):
640
310
"""Start a new checker subprocess if one is not running.
641
642
311
If a checker already exists, leave it running and do
643
312
nothing."""
644
313
# The reason for not killing a running checker is that if we
647
316
# client would inevitably timeout, since no checker would get
648
317
# a chance to run to completion. If we instead leave running
649
318
# checkers alone, the checker would have to take more time
650
# than 'timeout' for the client to be disabled, which is as it
651
# should be.
652
653
# If a checker exists, make sure it is not a zombie
654
try:
655
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
656
except (AttributeError, OSError) as error:
657
if (isinstance(error, OSError)
658
and error.errno != errno.ECHILD):
659
raise error
660
else:
661
if pid:
662
logger.warning("Checker was a zombie")
663
gobject.source_remove(self.checker_callback_tag)
664
self.checker_callback(pid, status,
665
self.current_checker_command)
666
# Start a new checker if needed
319
# than 'timeout' for the client to be declared invalid, which
320
# is as it should be.
667
321
if self.checker is None:
668
322
try:
669
# In case checker_command has exactly one % operator
670
command = self.checker_command % self.host
323
# In case check_command has exactly one % operator
324
command = self.check_command % self.host
671
325
except TypeError:
672
326
# Escape attributes for the shell
673
escaped_attrs = dict(
674
(attr,
675
re.escape(unicode(str(getattr(self, attr, "")),
676
errors=
677
'replace')))
678
for attr in
679
self.runtime_expansions)
680
327
escaped_attrs = dict((key, re.escape(str(val)))
328
for key, val in
329
vars(self).iteritems())
681
330
try:
682
command = self.checker_command % escaped_attrs
683
except TypeError as error:
684
logger.error('Could not format string "%s":'
685
' %s', self.checker_command, error)
331
command = self.check_command % escaped_attrs
332
except TypeError, error:
333
logger.error(u'Could not format string "%s":'
334
u' %s', self.check_command, error)
686
335
return True # Try again later
687
self.current_checker_command = command
688
336
try:
689
logger.info("Starting checker %r for %s",
337
logger.info(u"Starting checker %r for %s",
690
338
command, self.name)
691
# We don't need to redirect stdout and stderr, since
692
# in normal mode, that is already done by daemon(),
693
# and in debug mode we don't want to. (Stdin is
694
# always replaced by /dev/null.)
695
339
self.checker = subprocess.Popen(command,
696
340
close_fds=True,
697
341
shell=True, cwd="/")
698
self.checker_callback_tag = (gobject.child_watch_add
699
(self.checker.pid,
700
self.checker_callback,
701
data=command))
702
# The checker may have completed before the gobject
703
# watch was added. Check for this.
704
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
705
if pid:
706
gobject.source_remove(self.checker_callback_tag)
707
self.checker_callback(pid, status, command)
708
except OSError as error:
709
logger.error("Failed to start subprocess: %s",
342
self.checker_callback_tag = gobject.child_watch_add\
343
(self.checker.pid,
344
self.checker_callback)
345
except subprocess.OSError, error:
346
logger.error(u"Failed to start subprocess: %s",
710
347
error)
711
348
# Re-run this periodically if run by gobject.timeout_add
712
349
return True
713
714
350
def stop_checker(self):
715
351
"""Force the checker process, if any, to stop."""
716
352
if self.checker_callback_tag:
718
354
self.checker_callback_tag = None
719
355
if getattr(self, "checker", None) is None:
720
356
return
721
logger.debug("Stopping checker for %(name)s", vars(self))
357
logger.debug(u"Stopping checker for %(name)s", vars(self))
722
358
try:
723
359
os.kill(self.checker.pid, signal.SIGTERM)
724
#time.sleep(0.5)
360
#os.sleep(0.5)
725
361
#if self.checker.poll() is None:
726
362
# os.kill(self.checker.pid, signal.SIGKILL)
727
except OSError as error:
363
except OSError, error:
728
364
if error.errno != errno.ESRCH: # No such process
729
365
raise
730
366
self.checker = None
731
732
733
def dbus_service_property(dbus_interface, signature="v",
734
access="readwrite", byte_arrays=False):
735
"""Decorators for marking methods of a DBusObjectWithProperties to
736
become properties on the D-Bus.
737
738
The decorated method will be called with no arguments by "Get"
739
and with one argument by "Set".
740
741
The parameters, where they are supported, are the same as
742
dbus.service.method, except there is only "signature", since the
743
type from Get() and the type sent to Set() is the same.
744
"""
745
# Encoding deeply encoded byte arrays is not supported yet by the
746
# "Set" method, so we fail early here:
747
if byte_arrays and signature != "ay":
748
raise ValueError("Byte arrays not supported for non-'ay'"
749
" signature %r" % signature)
750
def decorator(func):
751
func._dbus_is_property = True
752
func._dbus_interface = dbus_interface
753
func._dbus_signature = signature
754
func._dbus_access = access
755
func._dbus_name = func.__name__
756
if func._dbus_name.endswith("_dbus_property"):
757
func._dbus_name = func._dbus_name[:-14]
758
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
759
return func
760
return decorator
761
762
763
class DBusPropertyException(dbus.exceptions.DBusException):
764
"""A base class for D-Bus property-related exceptions
765
"""
766
def __unicode__(self):
767
return unicode(str(self))
768
769
770
class DBusPropertyAccessException(DBusPropertyException):
771
"""A property's access permissions disallows an operation.
772
"""
773
pass
774
775
776
class DBusPropertyNotFound(DBusPropertyException):
777
"""An attempt was made to access a non-existing property.
778
"""
779
pass
780
781
782
class DBusObjectWithProperties(dbus.service.Object):
783
"""A D-Bus object with properties.
784
785
Classes inheriting from this can use the dbus_service_property
786
decorator to expose methods as D-Bus properties. It exposes the
787
standard Get(), Set(), and GetAll() methods on the D-Bus.
788
"""
789
790
@staticmethod
791
def _is_dbus_property(obj):
792
return getattr(obj, "_dbus_is_property", False)
793
794
def _get_all_dbus_properties(self):
795
"""Returns a generator of (name, attribute) pairs
796
"""
797
return ((prop.__get__(self)._dbus_name, prop.__get__(self))
798
for cls in self.__class__.__mro__
799
for name, prop in
800
inspect.getmembers(cls, self._is_dbus_property))
801
802
def _get_dbus_property(self, interface_name, property_name):
803
"""Returns a bound method if one exists which is a D-Bus
804
property with the specified name and interface.
805
"""
806
for cls in self.__class__.__mro__:
807
for name, value in (inspect.getmembers
808
(cls, self._is_dbus_property)):
809
if (value._dbus_name == property_name
810
and value._dbus_interface == interface_name):
811
return value.__get__(self)
812
813
# No such property
814
raise DBusPropertyNotFound(self.dbus_object_path + ":"
815
+ interface_name + "."
816
+ property_name)
817
818
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
819
out_signature="v")
820
def Get(self, interface_name, property_name):
821
"""Standard D-Bus property Get() method, see D-Bus standard.
822
"""
823
prop = self._get_dbus_property(interface_name, property_name)
824
if prop._dbus_access == "write":
825
raise DBusPropertyAccessException(property_name)
826
value = prop()
827
if not hasattr(value, "variant_level"):
828
return value
829
return type(value)(value, variant_level=value.variant_level+1)
830
831
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
832
def Set(self, interface_name, property_name, value):
833
"""Standard D-Bus property Set() method, see D-Bus standard.
834
"""
835
prop = self._get_dbus_property(interface_name, property_name)
836
if prop._dbus_access == "read":
837
raise DBusPropertyAccessException(property_name)
838
if prop._dbus_get_args_options["byte_arrays"]:
839
# The byte_arrays option is not supported yet on
840
# signatures other than "ay".
841
if prop._dbus_signature != "ay":
842
raise ValueError
843
value = dbus.ByteArray(''.join(unichr(byte)
844
for byte in value))
845
prop(value)
846
847
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
848
out_signature="a{sv}")
849
def GetAll(self, interface_name):
850
"""Standard D-Bus property GetAll() method, see D-Bus
851
standard.
852
853
Note: Will not include properties with access="write".
854
"""
855
properties = {}
856
for name, prop in self._get_all_dbus_properties():
857
if (interface_name
858
and interface_name != prop._dbus_interface):
859
# Interface non-empty but did not match
860
continue
861
# Ignore write-only properties
862
if prop._dbus_access == "write":
863
continue
864
value = prop()
865
if not hasattr(value, "variant_level"):
866
properties[name] = value
867
continue
868
properties[name] = type(value)(value, variant_level=
869
value.variant_level+1)
870
return dbus.Dictionary(properties, signature="sv")
871
872
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
873
out_signature="s",
874
path_keyword='object_path',
875
connection_keyword='connection')
876
def Introspect(self, object_path, connection):
877
"""Standard D-Bus method, overloaded to insert property tags.
878
"""
879
xmlstring = dbus.service.Object.Introspect(self, object_path,
880
connection)
881
try:
882
document = xml.dom.minidom.parseString(xmlstring)
883
def make_tag(document, name, prop):
884
e = document.createElement("property")
885
e.setAttribute("name", name)
886
e.setAttribute("type", prop._dbus_signature)
887
e.setAttribute("access", prop._dbus_access)
888
return e
889
for if_tag in document.getElementsByTagName("interface"):
890
for tag in (make_tag(document, name, prop)
891
for name, prop
892
in self._get_all_dbus_properties()
893
if prop._dbus_interface
894
== if_tag.getAttribute("name")):
895
if_tag.appendChild(tag)
896
# Add the names to the return values for the
897
# "org.freedesktop.DBus.Properties" methods
898
if (if_tag.getAttribute("name")
899
== "org.freedesktop.DBus.Properties"):
900
for cn in if_tag.getElementsByTagName("method"):
901
if cn.getAttribute("name") == "Get":
902
for arg in cn.getElementsByTagName("arg"):
903
if (arg.getAttribute("direction")
904
== "out"):
905
arg.setAttribute("name", "value")
906
elif cn.getAttribute("name") == "GetAll":
907
for arg in cn.getElementsByTagName("arg"):
908
if (arg.getAttribute("direction")
909
== "out"):
910
arg.setAttribute("name", "props")
911
xmlstring = document.toxml("utf-8")
912
document.unlink()
913
except (AttributeError, xml.dom.DOMException,
914
xml.parsers.expat.ExpatError) as error:
915
logger.error("Failed to override Introspection method",
916
error)
917
return xmlstring
918
919
920
def datetime_to_dbus (dt, variant_level=0):
921
"""Convert a UTC datetime.datetime() to a D-Bus type."""
922
if dt is None:
923
return dbus.String("", variant_level = variant_level)
924
return dbus.String(dt.isoformat(),
925
variant_level=variant_level)
926
927
928
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
929
.__metaclass__):
930
"""Applied to an empty subclass of a D-Bus object, this metaclass
931
will add additional D-Bus attributes matching a certain pattern.
932
"""
933
def __new__(mcs, name, bases, attr):
934
# Go through all the base classes which could have D-Bus
935
# methods, signals, or properties in them
936
for base in (b for b in bases
937
if issubclass(b, dbus.service.Object)):
938
# Go though all attributes of the base class
939
for attrname, attribute in inspect.getmembers(base):
940
# Ignore non-D-Bus attributes, and D-Bus attributes
941
# with the wrong interface name
942
if (not hasattr(attribute, "_dbus_interface")
943
or not attribute._dbus_interface
944
.startswith("se.recompile.Mandos")):
945
continue
946
# Create an alternate D-Bus interface name based on
947
# the current name
948
alt_interface = (attribute._dbus_interface
949
.replace("se.recompile.Mandos",
950
"se.bsnet.fukt.Mandos"))
951
# Is this a D-Bus signal?
952
if getattr(attribute, "_dbus_is_signal", False):
953
# Extract the original non-method function by
954
# black magic
955
nonmethod_func = (dict(
956
zip(attribute.func_code.co_freevars,
957
attribute.__closure__))["func"]
958
.cell_contents)
959
# Create a new, but exactly alike, function
960
# object, and decorate it to be a new D-Bus signal
961
# with the alternate D-Bus interface name
962
new_function = (dbus.service.signal
963
(alt_interface,
964
attribute._dbus_signature)
965
(types.FunctionType(
966
nonmethod_func.func_code,
967
nonmethod_func.func_globals,
968
nonmethod_func.func_name,
969
nonmethod_func.func_defaults,
970
nonmethod_func.func_closure)))
971
# Define a creator of a function to call both the
972
# old and new functions, so both the old and new
973
# signals gets sent when the function is called
974
def fixscope(func1, func2):
975
"""This function is a scope container to pass
976
func1 and func2 to the "call_both" function
977
outside of its arguments"""
978
def call_both(*args, **kwargs):
979
"""This function will emit two D-Bus
980
signals by calling func1 and func2"""
981
func1(*args, **kwargs)
982
func2(*args, **kwargs)
983
return call_both
984
# Create the "call_both" function and add it to
985
# the class
986
attr[attrname] = fixscope(attribute,
987
new_function)
988
# Is this a D-Bus method?
989
elif getattr(attribute, "_dbus_is_method", False):
990
# Create a new, but exactly alike, function
991
# object. Decorate it to be a new D-Bus method
992
# with the alternate D-Bus interface name. Add it
993
# to the class.
994
attr[attrname] = (dbus.service.method
995
(alt_interface,
996
attribute._dbus_in_signature,
997
attribute._dbus_out_signature)
998
(types.FunctionType
999
(attribute.func_code,
1000
attribute.func_globals,
1001
attribute.func_name,
1002
attribute.func_defaults,
1003
attribute.func_closure)))
1004
# Is this a D-Bus property?
1005
elif getattr(attribute, "_dbus_is_property", False):
1006
# Create a new, but exactly alike, function
1007
# object, and decorate it to be a new D-Bus
1008
# property with the alternate D-Bus interface
1009
# name. Add it to the class.
1010
attr[attrname] = (dbus_service_property
1011
(alt_interface,
1012
attribute._dbus_signature,
1013
attribute._dbus_access,
1014
attribute
1015
._dbus_get_args_options
1016
["byte_arrays"])
1017
(types.FunctionType
1018
(attribute.func_code,
1019
attribute.func_globals,
1020
attribute.func_name,
1021
attribute.func_defaults,
1022
attribute.func_closure)))
1023
return type.__new__(mcs, name, bases, attr)
1024
1025
1026
class ClientDBus(Client, DBusObjectWithProperties):
1027
"""A Client class using D-Bus
1028
1029
Attributes:
1030
dbus_object_path: dbus.ObjectPath
1031
bus: dbus.SystemBus()
1032
"""
1033
1034
runtime_expansions = (Client.runtime_expansions
1035
+ ("dbus_object_path",))
1036
1037
# dbus.service.Object doesn't use super(), so we can't either.
1038
1039
def __init__(self, bus = None, *args, **kwargs):
1040
self.bus = bus
1041
Client.__init__(self, *args, **kwargs)
1042
self._approvals_pending = 0
1043
1044
self._approvals_pending = 0
1045
# Only now, when this client is initialized, can it show up on
1046
# the D-Bus
1047
client_object_name = unicode(self.name).translate(
1048
{ord("."): ord("_"),
1049
ord("-"): ord("_")})
1050
self.dbus_object_path = (dbus.ObjectPath
1051
("/clients/" + client_object_name))
1052
DBusObjectWithProperties.__init__(self, self.bus,
1053
self.dbus_object_path)
1054
1055
def notifychangeproperty(transform_func,
1056
dbus_name, type_func=lambda x: x,
1057
variant_level=1):
1058
""" Modify a variable so that it's a property which announces
1059
its changes to DBus.
1060
1061
transform_fun: Function that takes a value and a variant_level
1062
and transforms it to a D-Bus type.
1063
dbus_name: D-Bus name of the variable
1064
type_func: Function that transform the value before sending it
1065
to the D-Bus. Default: no transform
1066
variant_level: D-Bus variant level. Default: 1
1067
"""
1068
attrname = "_{0}".format(dbus_name)
1069
def setter(self, value):
1070
if hasattr(self, "dbus_object_path"):
1071
if (not hasattr(self, attrname) or
1072
type_func(getattr(self, attrname, None))
1073
!= type_func(value)):
1074
dbus_value = transform_func(type_func(value),
1075
variant_level
1076
=variant_level)
1077
self.PropertyChanged(dbus.String(dbus_name),
1078
dbus_value)
1079
setattr(self, attrname, value)
1080
1081
return property(lambda self: getattr(self, attrname), setter)
1082
1083
1084
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1085
approvals_pending = notifychangeproperty(dbus.Boolean,
1086
"ApprovalPending",
1087
type_func = bool)
1088
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1089
last_enabled = notifychangeproperty(datetime_to_dbus,
1090
"LastEnabled")
1091
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1092
type_func = lambda checker:
1093
checker is not None)
1094
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1095
"LastCheckedOK")
1096
last_approval_request = notifychangeproperty(
1097
datetime_to_dbus, "LastApprovalRequest")
1098
approved_by_default = notifychangeproperty(dbus.Boolean,
1099
"ApprovedByDefault")
1100
approval_delay = notifychangeproperty(dbus.UInt64,
1101
"ApprovalDelay",
1102
type_func =
1103
timedelta_to_milliseconds)
1104
approval_duration = notifychangeproperty(
1105
dbus.UInt64, "ApprovalDuration",
1106
type_func = timedelta_to_milliseconds)
1107
host = notifychangeproperty(dbus.String, "Host")
1108
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1109
type_func =
1110
timedelta_to_milliseconds)
1111
extended_timeout = notifychangeproperty(
1112
dbus.UInt64, "ExtendedTimeout",
1113
type_func = timedelta_to_milliseconds)
1114
interval = notifychangeproperty(dbus.UInt64,
1115
"Interval",
1116
type_func =
1117
timedelta_to_milliseconds)
1118
checker_command = notifychangeproperty(dbus.String, "Checker")
1119
1120
del notifychangeproperty
1121
1122
def __del__(self, *args, **kwargs):
1123
try:
1124
self.remove_from_connection()
1125
except LookupError:
1126
pass
1127
if hasattr(DBusObjectWithProperties, "__del__"):
1128
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1129
Client.__del__(self, *args, **kwargs)
1130
1131
def checker_callback(self, pid, condition, command,
1132
*args, **kwargs):
1133
self.checker_callback_tag = None
1134
self.checker = None
1135
if os.WIFEXITED(condition):
1136
exitstatus = os.WEXITSTATUS(condition)
1137
# Emit D-Bus signal
1138
self.CheckerCompleted(dbus.Int16(exitstatus),
1139
dbus.Int64(condition),
1140
dbus.String(command))
1141
else:
1142
# Emit D-Bus signal
1143
self.CheckerCompleted(dbus.Int16(-1),
1144
dbus.Int64(condition),
1145
dbus.String(command))
1146
1147
return Client.checker_callback(self, pid, condition, command,
1148
*args, **kwargs)
1149
1150
def start_checker(self, *args, **kwargs):
1151
old_checker = self.checker
1152
if self.checker is not None:
1153
old_checker_pid = self.checker.pid
1154
else:
1155
old_checker_pid = None
1156
r = Client.start_checker(self, *args, **kwargs)
1157
# Only if new checker process was started
1158
if (self.checker is not None
1159
and old_checker_pid != self.checker.pid):
1160
# Emit D-Bus signal
1161
self.CheckerStarted(self.current_checker_command)
1162
return r
1163
1164
def _reset_approved(self):
1165
self.approved = None
1166
return False
1167
1168
def approve(self, value=True):
1169
self.send_changedstate()
1170
self.approved = value
1171
gobject.timeout_add(timedelta_to_milliseconds
1172
(self.approval_duration),
1173
self._reset_approved)
1174
1175
1176
## D-Bus methods, signals & properties
1177
_interface = "se.recompile.Mandos.Client"
1178
1179
## Signals
1180
1181
# CheckerCompleted - signal
1182
@dbus.service.signal(_interface, signature="nxs")
1183
def CheckerCompleted(self, exitcode, waitstatus, command):
1184
"D-Bus signal"
1185
pass
1186
1187
# CheckerStarted - signal
1188
@dbus.service.signal(_interface, signature="s")
1189
def CheckerStarted(self, command):
1190
"D-Bus signal"
1191
pass
1192
1193
# PropertyChanged - signal
1194
@dbus.service.signal(_interface, signature="sv")
1195
def PropertyChanged(self, property, value):
1196
"D-Bus signal"
1197
pass
1198
1199
# GotSecret - signal
1200
@dbus.service.signal(_interface)
1201
def GotSecret(self):
1202
"""D-Bus signal
1203
Is sent after a successful transfer of secret from the Mandos
1204
server to mandos-client
1205
"""
1206
pass
1207
1208
# Rejected - signal
1209
@dbus.service.signal(_interface, signature="s")
1210
def Rejected(self, reason):
1211
"D-Bus signal"
1212
pass
1213
1214
# NeedApproval - signal
1215
@dbus.service.signal(_interface, signature="tb")
1216
def NeedApproval(self, timeout, default):
1217
"D-Bus signal"
1218
return self.need_approval()
1219
1220
# NeRwequest - signal
1221
@dbus.service.signal(_interface, signature="s")
1222
def NewRequest(self, ip):
1223
"""D-Bus signal
1224
Is sent after a client request a password.
1225
"""
1226
pass
1227
1228
## Methods
1229
1230
# Approve - method
1231
@dbus.service.method(_interface, in_signature="b")
1232
def Approve(self, value):
1233
self.approve(value)
1234
1235
# CheckedOK - method
1236
@dbus.service.method(_interface)
1237
def CheckedOK(self):
1238
self.checked_ok()
1239
1240
# Enable - method
1241
@dbus.service.method(_interface)
1242
def Enable(self):
1243
"D-Bus method"
1244
self.enable()
1245
1246
# StartChecker - method
1247
@dbus.service.method(_interface)
1248
def StartChecker(self):
1249
"D-Bus method"
1250
self.start_checker()
1251
1252
# Disable - method
1253
@dbus.service.method(_interface)
1254
def Disable(self):
1255
"D-Bus method"
1256
self.disable()
1257
1258
# StopChecker - method
1259
@dbus.service.method(_interface)
1260
def StopChecker(self):
1261
self.stop_checker()
1262
1263
## Properties
1264
1265
# ApprovalPending - property
1266
@dbus_service_property(_interface, signature="b", access="read")
1267
def ApprovalPending_dbus_property(self):
1268
return dbus.Boolean(bool(self.approvals_pending))
1269
1270
# ApprovedByDefault - property
1271
@dbus_service_property(_interface, signature="b",
1272
access="readwrite")
1273
def ApprovedByDefault_dbus_property(self, value=None):
1274
if value is None: # get
1275
return dbus.Boolean(self.approved_by_default)
1276
self.approved_by_default = bool(value)
1277
1278
# ApprovalDelay - property
1279
@dbus_service_property(_interface, signature="t",
1280
access="readwrite")
1281
def ApprovalDelay_dbus_property(self, value=None):
1282
if value is None: # get
1283
return dbus.UInt64(self.approval_delay_milliseconds())
1284
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1285
1286
# ApprovalDuration - property
1287
@dbus_service_property(_interface, signature="t",
1288
access="readwrite")
1289
def ApprovalDuration_dbus_property(self, value=None):
1290
if value is None: # get
1291
return dbus.UInt64(timedelta_to_milliseconds(
1292
self.approval_duration))
1293
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1294
1295
# Name - property
1296
@dbus_service_property(_interface, signature="s", access="read")
1297
def Name_dbus_property(self):
1298
return dbus.String(self.name)
1299
1300
# Fingerprint - property
1301
@dbus_service_property(_interface, signature="s", access="read")
1302
def Fingerprint_dbus_property(self):
1303
return dbus.String(self.fingerprint)
1304
1305
# Host - property
1306
@dbus_service_property(_interface, signature="s",
1307
access="readwrite")
1308
def Host_dbus_property(self, value=None):
1309
if value is None: # get
1310
return dbus.String(self.host)
1311
self.host = unicode(value)
1312
1313
# Created - property
1314
@dbus_service_property(_interface, signature="s", access="read")
1315
def Created_dbus_property(self):
1316
return datetime_to_dbus(self.created)
1317
1318
# LastEnabled - property
1319
@dbus_service_property(_interface, signature="s", access="read")
1320
def LastEnabled_dbus_property(self):
1321
return datetime_to_dbus(self.last_enabled)
1322
1323
# Enabled - property
1324
@dbus_service_property(_interface, signature="b",
1325
access="readwrite")
1326
def Enabled_dbus_property(self, value=None):
1327
if value is None: # get
1328
return dbus.Boolean(self.enabled)
1329
if value:
1330
self.enable()
1331
else:
1332
self.disable()
1333
1334
# LastCheckedOK - property
1335
@dbus_service_property(_interface, signature="s",
1336
access="readwrite")
1337
def LastCheckedOK_dbus_property(self, value=None):
1338
if value is not None:
1339
self.checked_ok()
1340
return
1341
return datetime_to_dbus(self.last_checked_ok)
1342
1343
# Expires - property
1344
@dbus_service_property(_interface, signature="s", access="read")
1345
def Expires_dbus_property(self):
1346
return datetime_to_dbus(self.expires)
1347
1348
# LastApprovalRequest - property
1349
@dbus_service_property(_interface, signature="s", access="read")
1350
def LastApprovalRequest_dbus_property(self):
1351
return datetime_to_dbus(self.last_approval_request)
1352
1353
# Timeout - property
1354
@dbus_service_property(_interface, signature="t",
1355
access="readwrite")
1356
def Timeout_dbus_property(self, value=None):
1357
if value is None: # get
1358
return dbus.UInt64(self.timeout_milliseconds())
1359
self.timeout = datetime.timedelta(0, 0, 0, value)
1360
if getattr(self, "disable_initiator_tag", None) is None:
1361
return
1362
# Reschedule timeout
1363
gobject.source_remove(self.disable_initiator_tag)
1364
self.disable_initiator_tag = None
1365
self.expires = None
1366
time_to_die = timedelta_to_milliseconds((self
1367
.last_checked_ok
1368
+ self.timeout)
1369
- datetime.datetime
1370
.utcnow())
1371
if time_to_die <= 0:
1372
# The timeout has passed
1373
self.disable()
1374
else:
1375
self.expires = (datetime.datetime.utcnow()
1376
+ datetime.timedelta(milliseconds =
1377
time_to_die))
1378
self.disable_initiator_tag = (gobject.timeout_add
1379
(time_to_die, self.disable))
1380
1381
# ExtendedTimeout - property
1382
@dbus_service_property(_interface, signature="t",
1383
access="readwrite")
1384
def ExtendedTimeout_dbus_property(self, value=None):
1385
if value is None: # get
1386
return dbus.UInt64(self.extended_timeout_milliseconds())
1387
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1388
1389
# Interval - property
1390
@dbus_service_property(_interface, signature="t",
1391
access="readwrite")
1392
def Interval_dbus_property(self, value=None):
1393
if value is None: # get
1394
return dbus.UInt64(self.interval_milliseconds())
1395
self.interval = datetime.timedelta(0, 0, 0, value)
1396
if getattr(self, "checker_initiator_tag", None) is None:
1397
return
1398
if self.enabled:
1399
# Reschedule checker run
1400
gobject.source_remove(self.checker_initiator_tag)
1401
self.checker_initiator_tag = (gobject.timeout_add
1402
(value, self.start_checker))
1403
self.start_checker() # Start one now, too
1404
1405
# Checker - property
1406
@dbus_service_property(_interface, signature="s",
1407
access="readwrite")
1408
def Checker_dbus_property(self, value=None):
1409
if value is None: # get
1410
return dbus.String(self.checker_command)
1411
self.checker_command = unicode(value)
1412
1413
# CheckerRunning - property
1414
@dbus_service_property(_interface, signature="b",
1415
access="readwrite")
1416
def CheckerRunning_dbus_property(self, value=None):
1417
if value is None: # get
1418
return dbus.Boolean(self.checker is not None)
1419
if value:
1420
self.start_checker()
1421
else:
1422
self.stop_checker()
1423
1424
# ObjectPath - property
1425
@dbus_service_property(_interface, signature="o", access="read")
1426
def ObjectPath_dbus_property(self):
1427
return self.dbus_object_path # is already a dbus.ObjectPath
1428
1429
# Secret = property
1430
@dbus_service_property(_interface, signature="ay",
1431
access="write", byte_arrays=True)
1432
def Secret_dbus_property(self, value):
1433
self.secret = str(value)
1434
1435
del _interface
1436
1437
1438
class ProxyClient(object):
1439
def __init__(self, child_pipe, fpr, address):
1440
self._pipe = child_pipe
1441
self._pipe.send(('init', fpr, address))
1442
if not self._pipe.recv():
1443
raise KeyError()
1444
1445
def __getattribute__(self, name):
1446
if name == '_pipe':
1447
return super(ProxyClient, self).__getattribute__(name)
1448
self._pipe.send(('getattr', name))
1449
data = self._pipe.recv()
1450
if data[0] == 'data':
1451
return data[1]
1452
if data[0] == 'function':
1453
def func(*args, **kwargs):
1454
self._pipe.send(('funcall', name, args, kwargs))
1455
return self._pipe.recv()[1]
1456
return func
1457
1458
def __setattr__(self, name, value):
1459
if name == '_pipe':
1460
return super(ProxyClient, self).__setattr__(name, value)
1461
self._pipe.send(('setattr', name, value))
1462
1463
1464
class ClientDBusTransitional(ClientDBus):
1465
__metaclass__ = AlternateDBusNamesMetaclass
1466
1467
1468
class ClientHandler(socketserver.BaseRequestHandler, object):
1469
"""A class to handle client connections.
1470
1471
Instantiated once for each connection to handle it.
367
def still_valid(self):
368
"""Has the timeout not yet passed for this client?"""
369
now = datetime.datetime.now()
370
if self.last_checked_ok is None:
371
return now < (self.created + self.timeout)
372
else:
373
return now < (self.last_checked_ok + self.timeout)
374
375
376
def peer_certificate(session):
377
"Return the peer's OpenPGP certificate as a bytestring"
378
# If not an OpenPGP certificate...
379
if gnutls.library.functions.gnutls_certificate_type_get\
380
(session._c_object) \
381
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP:
382
# ...do the normal thing
383
return session.peer_certificate
384
list_size = ctypes.c_uint()
385
cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
386
(session._c_object, ctypes.byref(list_size))
387
if list_size.value == 0:
388
return None
389
cert = cert_list[0]
390
return ctypes.string_at(cert.data, cert.size)
391
392
393
def fingerprint(openpgp):
394
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
395
# New GnuTLS "datum" with the OpenPGP public key
396
datum = gnutls.library.types.gnutls_datum_t\
397
(ctypes.cast(ctypes.c_char_p(openpgp),
398
ctypes.POINTER(ctypes.c_ubyte)),
399
ctypes.c_uint(len(openpgp)))
400
# New empty GnuTLS certificate
401
crt = gnutls.library.types.gnutls_openpgp_crt_t()
402
gnutls.library.functions.gnutls_openpgp_crt_init\
403
(ctypes.byref(crt))
404
# Import the OpenPGP public key into the certificate
405
gnutls.library.functions.gnutls_openpgp_crt_import\
406
(crt, ctypes.byref(datum),
407
gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
408
# New buffer for the fingerprint
409
buffer = ctypes.create_string_buffer(20)
410
buffer_length = ctypes.c_size_t()
411
# Get the fingerprint from the certificate into the buffer
412
gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
413
(crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
414
# Deinit the certificate
415
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
416
# Convert the buffer to a Python bytestring
417
fpr = ctypes.string_at(buffer, buffer_length.value)
418
# Convert the bytestring to hexadecimal notation
419
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
420
return hex_fpr
421
422
423
class tcp_handler(SocketServer.BaseRequestHandler, object):
424
"""A TCP request handler class.
425
Instantiated by IPv6_TCPServer for each request to handle it.
1472
426
Note: This will run in its own forked process."""
1473
427
1474
428
def handle(self):
1475
with contextlib.closing(self.server.child_pipe) as child_pipe:
1476
logger.info("TCP connection from: %s",
1477
unicode(self.client_address))
1478
logger.debug("Pipe FD: %d",
1479
self.server.child_pipe.fileno())
1480
1481
session = (gnutls.connection
1482
.ClientSession(self.request,
1483
gnutls.connection
1484
.X509Credentials()))
1485
1486
# Note: gnutls.connection.X509Credentials is really a
1487
# generic GnuTLS certificate credentials object so long as
1488
# no X.509 keys are added to it. Therefore, we can use it
1489
# here despite using OpenPGP certificates.
1490
1491
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1492
# "+AES-256-CBC", "+SHA1",
1493
# "+COMP-NULL", "+CTYPE-OPENPGP",
1494
# "+DHE-DSS"))
1495
# Use a fallback default, since this MUST be set.
1496
priority = self.server.gnutls_priority
1497
if priority is None:
1498
priority = "NORMAL"
1499
(gnutls.library.functions
1500
.gnutls_priority_set_direct(session._c_object,
1501
priority, None))
1502
1503
# Start communication using the Mandos protocol
1504
# Get protocol number
1505
line = self.request.makefile().readline()
1506
logger.debug("Protocol version: %r", line)
1507
try:
1508
if int(line.strip().split()[0]) > 1:
1509
raise RuntimeError
1510
except (ValueError, IndexError, RuntimeError) as error:
1511
logger.error("Unknown protocol version: %s", error)
1512
return
1513
1514
# Start GnuTLS connection
1515
try:
1516
session.handshake()
1517
except gnutls.errors.GNUTLSError as error:
1518
logger.warning("Handshake failed: %s", error)
1519
# Do not run session.bye() here: the session is not
1520
# established. Just abandon the request.
1521
return
1522
logger.debug("Handshake succeeded")
1523
1524
approval_required = False
1525
try:
1526
try:
1527
fpr = self.fingerprint(self.peer_certificate
1528
(session))
1529
except (TypeError,
1530
gnutls.errors.GNUTLSError) as error:
1531
logger.warning("Bad certificate: %s", error)
1532
return
1533
logger.debug("Fingerprint: %s", fpr)
1534
1535
try:
1536
client = ProxyClient(child_pipe, fpr,
1537
self.client_address)
1538
except KeyError:
1539
return
1540
1541
if self.server.use_dbus:
1542
# Emit D-Bus signal
1543
client.NewRequest(str(self.client_address))
1544
1545
if client.approval_delay:
1546
delay = client.approval_delay
1547
client.approvals_pending += 1
1548
approval_required = True
1549
1550
while True:
1551
if not client.enabled:
1552
logger.info("Client %s is disabled",
1553
client.name)
1554
if self.server.use_dbus:
1555
# Emit D-Bus signal
1556
client.Rejected("Disabled")
1557
return
1558
1559
if client.approved or not client.approval_delay:
1560
#We are approved or approval is disabled
1561
break
1562
elif client.approved is None:
1563
logger.info("Client %s needs approval",
1564
client.name)
1565
if self.server.use_dbus:
1566
# Emit D-Bus signal
1567
client.NeedApproval(
1568
client.approval_delay_milliseconds(),
1569
client.approved_by_default)
1570
else:
1571
logger.warning("Client %s was not approved",
1572
client.name)
1573
if self.server.use_dbus:
1574
# Emit D-Bus signal
1575
client.Rejected("Denied")
1576
return
1577
1578
#wait until timeout or approved
1579
time = datetime.datetime.now()
1580
client.changedstate.acquire()
1581
(client.changedstate.wait
1582
(float(client.timedelta_to_milliseconds(delay)
1583
/ 1000)))
1584
client.changedstate.release()
1585
time2 = datetime.datetime.now()
1586
if (time2 - time) >= delay:
1587
if not client.approved_by_default:
1588
logger.warning("Client %s timed out while"
1589
" waiting for approval",
1590
client.name)
1591
if self.server.use_dbus:
1592
# Emit D-Bus signal
1593
client.Rejected("Approval timed out")
1594
return
1595
else:
1596
break
1597
else:
1598
delay -= time2 - time
1599
1600
sent_size = 0
1601
while sent_size < len(client.secret):
1602
try:
1603
sent = session.send(client.secret[sent_size:])
1604
except gnutls.errors.GNUTLSError as error:
1605
logger.warning("gnutls send failed")
1606
return
1607
logger.debug("Sent: %d, remaining: %d",
1608
sent, len(client.secret)
1609
- (sent_size + sent))
1610
sent_size += sent
1611
1612
logger.info("Sending secret to %s", client.name)
1613
# bump the timeout using extended_timeout
1614
client.checked_ok(client.extended_timeout)
1615
if self.server.use_dbus:
1616
# Emit D-Bus signal
1617
client.GotSecret()
1618
1619
finally:
1620
if approval_required:
1621
client.approvals_pending -= 1
1622
try:
1623
session.bye()
1624
except gnutls.errors.GNUTLSError as error:
1625
logger.warning("GnuTLS bye failed")
1626
1627
@staticmethod
1628
def peer_certificate(session):
1629
"Return the peer's OpenPGP certificate as a bytestring"
1630
# If not an OpenPGP certificate...
1631
if (gnutls.library.functions
1632
.gnutls_certificate_type_get(session._c_object)
1633
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1634
# ...do the normal thing
1635
return session.peer_certificate
1636
list_size = ctypes.c_uint(1)
1637
cert_list = (gnutls.library.functions
1638
.gnutls_certificate_get_peers
1639
(session._c_object, ctypes.byref(list_size)))
1640
if not bool(cert_list) and list_size.value != 0:
1641
raise gnutls.errors.GNUTLSError("error getting peer"
1642
" certificate")
1643
if list_size.value == 0:
1644
return None
1645
cert = cert_list[0]
1646
return ctypes.string_at(cert.data, cert.size)
1647
1648
@staticmethod
1649
def fingerprint(openpgp):
1650
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1651
# New GnuTLS "datum" with the OpenPGP public key
1652
datum = (gnutls.library.types
1653
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1654
ctypes.POINTER
1655
(ctypes.c_ubyte)),
1656
ctypes.c_uint(len(openpgp))))
1657
# New empty GnuTLS certificate
1658
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1659
(gnutls.library.functions
1660
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1661
# Import the OpenPGP public key into the certificate
1662
(gnutls.library.functions
1663
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1664
gnutls.library.constants
1665
.GNUTLS_OPENPGP_FMT_RAW))
1666
# Verify the self signature in the key
1667
crtverify = ctypes.c_uint()
1668
(gnutls.library.functions
1669
.gnutls_openpgp_crt_verify_self(crt, 0,
1670
ctypes.byref(crtverify)))
1671
if crtverify.value != 0:
1672
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1673
raise (gnutls.errors.CertificateSecurityError
1674
("Verify failed"))
1675
# New buffer for the fingerprint
1676
buf = ctypes.create_string_buffer(20)
1677
buf_len = ctypes.c_size_t()
1678
# Get the fingerprint from the certificate into the buffer
1679
(gnutls.library.functions
1680
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1681
ctypes.byref(buf_len)))
1682
# Deinit the certificate
1683
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1684
# Convert the buffer to a Python bytestring
1685
fpr = ctypes.string_at(buf, buf_len.value)
1686
# Convert the bytestring to hexadecimal notation
1687
hex_fpr = binascii.hexlify(fpr).upper()
1688
return hex_fpr
1689
1690
1691
class MultiprocessingMixIn(object):
1692
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1693
def sub_process_main(self, request, address):
1694
try:
1695
self.finish_request(request, address)
1696
except Exception:
1697
self.handle_error(request, address)
1698
self.close_request(request)
1699
1700
def process_request(self, request, address):
1701
"""Start a new process to process the request."""
1702
proc = multiprocessing.Process(target = self.sub_process_main,
1703
args = (request,
1704
address))
1705
proc.start()
1706
return proc
1707
1708
1709
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1710
""" adds a pipe to the MixIn """
1711
def process_request(self, request, client_address):
1712
"""Overrides and wraps the original process_request().
1713
1714
This function creates a new pipe in self.pipe
1715
"""
1716
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1717
1718
proc = MultiprocessingMixIn.process_request(self, request,
1719
client_address)
1720
self.child_pipe.close()
1721
self.add_pipe(parent_pipe, proc)
1722
1723
def add_pipe(self, parent_pipe, proc):
1724
"""Dummy function; override as necessary"""
1725
raise NotImplementedError
1726
1727
1728
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1729
socketserver.TCPServer, object):
1730
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1731
429
logger.info(u"TCP connection from: %s",
430
unicode(self.client_address))
431
session = gnutls.connection.ClientSession\
432
(self.request, gnutls.connection.X509Credentials())
433
434
line = self.request.makefile().readline()
435
logger.debug(u"Protocol version: %r", line)
436
try:
437
if int(line.strip().split()[0]) > 1:
438
raise RuntimeError
439
except (ValueError, IndexError, RuntimeError), error:
440
logger.error(u"Unknown protocol version: %s", error)
441
return
442
443
# Note: gnutls.connection.X509Credentials is really a generic
444
# GnuTLS certificate credentials object so long as no X.509
445
# keys are added to it. Therefore, we can use it here despite
446
# using OpenPGP certificates.
447
448
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
449
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
450
# "+DHE-DSS"))
451
priority = "NORMAL" # Fallback default, since this
452
# MUST be set.
453
if self.server.settings["priority"]:
454
priority = self.server.settings["priority"]
455
gnutls.library.functions.gnutls_priority_set_direct\
456
(session._c_object, priority, None);
457
458
try:
459
session.handshake()
460
except gnutls.errors.GNUTLSError, error:
461
logger.warning(u"Handshake failed: %s", error)
462
# Do not run session.bye() here: the session is not
463
# established. Just abandon the request.
464
return
465
try:
466
fpr = fingerprint(peer_certificate(session))
467
except (TypeError, gnutls.errors.GNUTLSError), error:
468
logger.warning(u"Bad certificate: %s", error)
469
session.bye()
470
return
471
logger.debug(u"Fingerprint: %s", fpr)
472
client = None
473
for c in self.server.clients:
474
if c.fingerprint == fpr:
475
client = c
476
break
477
if not client:
478
logger.warning(u"Client not found for fingerprint: %s",
479
fpr)
480
session.bye()
481
return
482
# Have to check if client.still_valid(), since it is possible
483
# that the client timed out while establishing the GnuTLS
484
# session.
485
if not client.still_valid():
486
logger.warning(u"Client %(name)s is invalid",
487
vars(client))
488
session.bye()
489
return
490
sent_size = 0
491
while sent_size < len(client.secret):
492
sent = session.send(client.secret[sent_size:])
493
logger.debug(u"Sent: %d, remaining: %d",
494
sent, len(client.secret)
495
- (sent_size + sent))
496
sent_size += sent
497
session.bye()
498
499
500
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
501
"""IPv6 TCP server. Accepts 'None' as address and/or port.
1732
502
Attributes:
1733
enabled: Boolean; whether this server is activated yet
1734
interface: None or a network interface name (string)
1735
use_ipv6: Boolean; to use IPv6 or not
503
settings: Server settings
504
clients: Set() of Client objects
1736
505
"""
1737
def __init__(self, server_address, RequestHandlerClass,
1738
interface=None, use_ipv6=True):
1739
self.interface = interface
1740
if use_ipv6:
1741
self.address_family = socket.AF_INET6
1742
socketserver.TCPServer.__init__(self, server_address,
1743
RequestHandlerClass)
506
address_family = socket.AF_INET6
507
def __init__(self, *args, **kwargs):
508
if "settings" in kwargs:
509
self.settings = kwargs["settings"]
510
del kwargs["settings"]
511
if "clients" in kwargs:
512
self.clients = kwargs["clients"]
513
del kwargs["clients"]
514
return super(type(self), self).__init__(*args, **kwargs)
1744
515
def server_bind(self):
1745
516
"""This overrides the normal server_bind() function
1746
517
to bind to an interface if one was specified, and also NOT to
1747
518
bind to an address or port if they were not specified."""
1748
if self.interface is not None:
1749
if SO_BINDTODEVICE is None:
1750
logger.error("SO_BINDTODEVICE does not exist;"
1751
" cannot bind to interface %s",
1752
self.interface)
1753
else:
1754
try:
1755
self.socket.setsockopt(socket.SOL_SOCKET,
1756
SO_BINDTODEVICE,
1757
str(self.interface
1758
+ '\0'))
1759
except socket.error as error:
1760
if error[0] == errno.EPERM:
1761
logger.error("No permission to"
1762
" bind to interface %s",
1763
self.interface)
1764
elif error[0] == errno.ENOPROTOOPT:
1765
logger.error("SO_BINDTODEVICE not available;"
1766
" cannot bind to interface %s",
1767
self.interface)
1768
else:
1769
raise
519
if self.settings["interface"]:
520
# 25 is from /usr/include/asm-i486/socket.h
521
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
522
try:
523
self.socket.setsockopt(socket.SOL_SOCKET,
524
SO_BINDTODEVICE,
525
self.settings["interface"])
526
except socket.error, error:
527
if error[0] == errno.EPERM:
528
logger.error(u"No permission to"
529
u" bind to interface %s",
530
self.settings["interface"])
531
else:
532
raise error
1770
533
# Only bind(2) the socket if we really need to.
1771
534
if self.server_address[0] or self.server_address[1]:
1772
535
if not self.server_address[0]:
1773
if self.address_family == socket.AF_INET6:
1774
any_address = "::" # in6addr_any
1775
else:
1776
any_address = socket.INADDR_ANY
1777
self.server_address = (any_address,
536
in6addr_any = "::"
537
self.server_address = (in6addr_any,
1778
538
self.server_address[1])
1779
539
elif not self.server_address[1]:
1780
540
self.server_address = (self.server_address[0],
1781
541
0)
1782
# if self.interface:
542
# if self.settings["interface"]:
1783
543
# self.server_address = (self.server_address[0],
1784
544
# 0, # port
1785
545
# 0, # flowinfo
1786
546
# if_nametoindex
1787
# (self.interface))
1788
return socketserver.TCPServer.server_bind(self)
1789
1790
1791
class MandosServer(IPv6_TCPServer):
1792
"""Mandos server.
1793
1794
Attributes:
1795
clients: set of Client objects
1796
gnutls_priority GnuTLS priority string
1797
use_dbus: Boolean; to emit D-Bus signals or not
1798
1799
Assumes a gobject.MainLoop event loop.
1800
"""
1801
def __init__(self, server_address, RequestHandlerClass,
1802
interface=None, use_ipv6=True, clients=None,
1803
gnutls_priority=None, use_dbus=True):
1804
self.enabled = False
1805
self.clients = clients
1806
if self.clients is None:
1807
self.clients = {}
1808
self.use_dbus = use_dbus
1809
self.gnutls_priority = gnutls_priority
1810
IPv6_TCPServer.__init__(self, server_address,
1811
RequestHandlerClass,
1812
interface = interface,
1813
use_ipv6 = use_ipv6)
1814
def server_activate(self):
1815
if self.enabled:
1816
return socketserver.TCPServer.server_activate(self)
1817
1818
def enable(self):
1819
self.enabled = True
1820
1821
def add_pipe(self, parent_pipe, proc):
1822
# Call "handle_ipc" for both data and EOF events
1823
gobject.io_add_watch(parent_pipe.fileno(),
1824
gobject.IO_IN | gobject.IO_HUP,
1825
functools.partial(self.handle_ipc,
1826
parent_pipe =
1827
parent_pipe,
1828
proc = proc))
1829
1830
def handle_ipc(self, source, condition, parent_pipe=None,
1831
proc = None, client_object=None):
1832
condition_names = {
1833
gobject.IO_IN: "IN", # There is data to read.
1834
gobject.IO_OUT: "OUT", # Data can be written (without
1835
# blocking).
1836
gobject.IO_PRI: "PRI", # There is urgent data to read.
1837
gobject.IO_ERR: "ERR", # Error condition.
1838
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1839
# broken, usually for pipes and
1840
# sockets).
1841
}
1842
conditions_string = ' | '.join(name
1843
for cond, name in
1844
condition_names.iteritems()
1845
if cond & condition)
1846
# error, or the other end of multiprocessing.Pipe has closed
1847
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
1848
# Wait for other process to exit
1849
proc.join()
1850
return False
1851
1852
# Read a request from the child
1853
request = parent_pipe.recv()
1854
command = request[0]
1855
1856
if command == 'init':
1857
fpr = request[1]
1858
address = request[2]
1859
1860
for c in self.clients.itervalues():
1861
if c.fingerprint == fpr:
1862
client = c
1863
break
1864
else:
1865
logger.info("Client not found for fingerprint: %s, ad"
1866
"dress: %s", fpr, address)
1867
if self.use_dbus:
1868
# Emit D-Bus signal
1869
mandos_dbus_service.ClientNotFound(fpr,
1870
address[0])
1871
parent_pipe.send(False)
1872
return False
1873
1874
gobject.io_add_watch(parent_pipe.fileno(),
1875
gobject.IO_IN | gobject.IO_HUP,
1876
functools.partial(self.handle_ipc,
1877
parent_pipe =
1878
parent_pipe,
1879
proc = proc,
1880
client_object =
1881
client))
1882
parent_pipe.send(True)
1883
# remove the old hook in favor of the new above hook on
1884
# same fileno
1885
return False
1886
if command == 'funcall':
1887
funcname = request[1]
1888
args = request[2]
1889
kwargs = request[3]
1890
1891
parent_pipe.send(('data', getattr(client_object,
1892
funcname)(*args,
1893
**kwargs)))
1894
1895
if command == 'getattr':
1896
attrname = request[1]
1897
if callable(client_object.__getattribute__(attrname)):
1898
parent_pipe.send(('function',))
1899
else:
1900
parent_pipe.send(('data', client_object
1901
.__getattribute__(attrname)))
1902
1903
if command == 'setattr':
1904
attrname = request[1]
1905
value = request[2]
1906
setattr(client_object, attrname, value)
1907
1908
return True
547
# (self.settings
548
# ["interface"]))
549
return super(type(self), self).server_bind()
1909
550
1910
551
1911
552
def string_to_delta(interval):
1912
553
"""Parse a string and return a datetime.timedelta
1913
554
1914
555
>>> string_to_delta('7d')
1915
556
datetime.timedelta(7)
1916
557
>>> string_to_delta('60s')
1919
560
datetime.timedelta(0, 3600)
1920
561
>>> string_to_delta('24h')
1921
562
datetime.timedelta(1)
1922
>>> string_to_delta('1w')
563
>>> string_to_delta(u'1w')
1923
564
datetime.timedelta(7)
1924
>>> string_to_delta('5m 30s')
1925
datetime.timedelta(0, 330)
1926
565
"""
1927
timevalue = datetime.timedelta(0)
1928
for s in interval.split():
1929
try:
1930
suffix = unicode(s[-1])
1931
value = int(s[:-1])
1932
if suffix == "d":
1933
delta = datetime.timedelta(value)
1934
elif suffix == "s":
1935
delta = datetime.timedelta(0, value)
1936
elif suffix == "m":
1937
delta = datetime.timedelta(0, 0, 0, 0, value)
1938
elif suffix == "h":
1939
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
1940
elif suffix == "w":
1941
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1942
else:
1943
raise ValueError("Unknown suffix %r" % suffix)
1944
except (ValueError, IndexError) as e:
1945
raise ValueError(*(e.args))
1946
timevalue += delta
1947
return timevalue
566
try:
567
suffix=unicode(interval[-1])
568
value=int(interval[:-1])
569
if suffix == u"d":
570
delta = datetime.timedelta(value)
571
elif suffix == u"s":
572
delta = datetime.timedelta(0, value)
573
elif suffix == u"m":
574
delta = datetime.timedelta(0, 0, 0, 0, value)
575
elif suffix == u"h":
576
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
577
elif suffix == u"w":
578
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
579
else:
580
raise ValueError
581
except (ValueError, IndexError):
582
raise ValueError
583
return delta
584
585
586
def server_state_changed(state):
587
"""Derived from the Avahi example code"""
588
if state == avahi.SERVER_COLLISION:
589
logger.error(u"Server name collision")
590
service.remove()
591
elif state == avahi.SERVER_RUNNING:
592
service.add()
593
594
595
def entry_group_state_changed(state, error):
596
"""Derived from the Avahi example code"""
597
logger.debug(u"state change: %i", state)
598
599
if state == avahi.ENTRY_GROUP_ESTABLISHED:
600
logger.debug(u"Service established.")
601
elif state == avahi.ENTRY_GROUP_COLLISION:
602
logger.warning(u"Service name collision.")
603
service.rename()
604
elif state == avahi.ENTRY_GROUP_FAILURE:
605
logger.critical(u"Error in group state changed %s",
606
unicode(error))
607
raise AvahiGroupError("State changed: %s", str(error))
608
609
def if_nametoindex(interface):
610
"""Call the C function if_nametoindex(), or equivalent"""
611
global if_nametoindex
612
try:
613
if "ctypes.util" not in sys.modules:
614
import ctypes.util
615
if_nametoindex = ctypes.cdll.LoadLibrary\
616
(ctypes.util.find_library("c")).if_nametoindex
617
except (OSError, AttributeError):
618
if "struct" not in sys.modules:
619
import struct
620
if "fcntl" not in sys.modules:
621
import fcntl
622
def if_nametoindex(interface):
623
"Get an interface index the hard way, i.e. using fcntl()"
624
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
625
s = socket.socket()
626
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
627
struct.pack("16s16x", interface))
628
s.close()
629
interface_index = struct.unpack("I", ifreq[16:20])[0]
630
return interface_index
631
return if_nametoindex(interface)
1948
632
1949
633
1950
634
def daemon(nochdir = False, noclose = False):
1951
635
"""See daemon(3). Standard BSD Unix function.
1952
1953
636
This should really exist as os.daemon, but it doesn't (yet)."""
1954
637
if os.fork():
1955
638
sys.exit()
1963
646
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1964
647
if not stat.S_ISCHR(os.fstat(null).st_mode):
1965
648
raise OSError(errno.ENODEV,
1966
"%s not a character device"
1967
% os.path.devnull)
649
"/dev/null not a character device")
1968
650
os.dup2(null, sys.stdin.fileno())
1969
651
os.dup2(null, sys.stdout.fileno())
1970
652
os.dup2(null, sys.stderr.fileno())
1973
655
1974
656
1975
657
def main():
1976
1977
##################################################################
1978
# Parsing of options, both command line and config file
1979
1980
parser = argparse.ArgumentParser()
1981
parser.add_argument("-v", "--version", action="version",
1982
version = "%%(prog)s %s" % version,
1983
help="show version number and exit")
1984
parser.add_argument("-i", "--interface", metavar="IF",
1985
help="Bind to interface IF")
1986
parser.add_argument("-a", "--address",
1987
help="Address to listen for requests on")
1988
parser.add_argument("-p", "--port", type=int,
1989
help="Port number to receive requests on")
1990
parser.add_argument("--check", action="store_true",
1991
help="Run self-test")
1992
parser.add_argument("--debug", action="store_true",
1993
help="Debug mode; run in foreground and log"
1994
" to terminal")
1995
parser.add_argument("--debuglevel", metavar="LEVEL",
1996
help="Debug level for stdout output")
1997
parser.add_argument("--priority", help="GnuTLS"
1998
" priority string (see GnuTLS documentation)")
1999
parser.add_argument("--servicename",
2000
metavar="NAME", help="Zeroconf service name")
2001
parser.add_argument("--configdir",
2002
default="/etc/mandos", metavar="DIR",
2003
help="Directory to search for configuration"
2004
" files")
2005
parser.add_argument("--no-dbus", action="store_false",
2006
dest="use_dbus", help="Do not provide D-Bus"
2007
" system bus interface")
2008
parser.add_argument("--no-ipv6", action="store_false",
2009
dest="use_ipv6", help="Do not use IPv6")
2010
parser.add_argument("--no-restore", action="store_false",
2011
dest="restore", help="Do not restore stored"
2012
" state")
2013
parser.add_argument("--statedir", metavar="DIR",
2014
help="Directory to save/restore state in")
2015
2016
options = parser.parse_args()
658
global main_loop_started
659
main_loop_started = False
660
661
parser = OptionParser(version = "%%prog %s" % version)
662
parser.add_option("-i", "--interface", type="string",
663
metavar="IF", help="Bind to interface IF")
664
parser.add_option("-a", "--address", type="string",
665
help="Address to listen for requests on")
666
parser.add_option("-p", "--port", type="int",
667
help="Port number to receive requests on")
668
parser.add_option("--check", action="store_true", default=False,
669
help="Run self-test")
670
parser.add_option("--debug", action="store_true",
671
help="Debug mode; run in foreground and log to"
672
" terminal")
673
parser.add_option("--priority", type="string", help="GnuTLS"
674
" priority string (see GnuTLS documentation)")
675
parser.add_option("--servicename", type="string", metavar="NAME",
676
help="Zeroconf service name")
677
parser.add_option("--configdir", type="string",
678
default="/etc/mandos", metavar="DIR",
679
help="Directory to search for configuration"
680
" files")
681
(options, args) = parser.parse_args()
2017
682
2018
683
if options.check:
2019
684
import doctest
2028
693
"priority":
2029
694
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2030
695
"servicename": "Mandos",
2031
"use_dbus": "True",
2032
"use_ipv6": "True",
2033
"debuglevel": "",
2034
"restore": "True",
2035
"statedir": "/var/lib/mandos"
2036
696
}
2037
697
2038
698
# Parse config file for server-global settings
2039
server_config = configparser.SafeConfigParser(server_defaults)
699
server_config = ConfigParser.SafeConfigParser(server_defaults)
2040
700
del server_defaults
2041
server_config.read(os.path.join(options.configdir,
2042
"mandos.conf"))
701
server_config.read(os.path.join(options.configdir, "mandos.conf"))
702
server_section = "server"
2043
703
# Convert the SafeConfigParser object to a dict
2044
server_settings = server_config.defaults()
2045
# Use the appropriate methods on the non-string config options
2046
for option in ("debug", "use_dbus", "use_ipv6"):
2047
server_settings[option] = server_config.getboolean("DEFAULT",
2048
option)
2049
if server_settings["port"]:
2050
server_settings["port"] = server_config.getint("DEFAULT",
2051
"port")
704
server_settings = dict(server_config.items(server_section))
705
# Use getboolean on the boolean config option
706
server_settings["debug"] = server_config.getboolean\
707
(server_section, "debug")
2052
708
del server_config
2053
709
2054
710
# Override the settings from the config file with command line
2055
711
# options, if set.
2056
712
for option in ("interface", "address", "port", "debug",
2057
"priority", "servicename", "configdir",
2058
"use_dbus", "use_ipv6", "debuglevel", "restore",
2059
"statedir"):
713
"priority", "servicename", "configdir"):
2060
714
value = getattr(options, option)
2061
715
if value is not None:
2062
716
server_settings[option] = value
2063
717
del options
2064
# Force all strings to be unicode
2065
for option in server_settings.keys():
2066
if type(server_settings[option]) is str:
2067
server_settings[option] = unicode(server_settings[option])
2068
718
# Now we have our good server settings in "server_settings"
2069
719
2070
##################################################################
2071
2072
# For convenience
2073
720
debug = server_settings["debug"]
2074
debuglevel = server_settings["debuglevel"]
2075
use_dbus = server_settings["use_dbus"]
2076
use_ipv6 = server_settings["use_ipv6"]
2077
stored_state_path = os.path.join(server_settings["statedir"],
2078
stored_state_file)
2079
721
2080
if debug:
2081
initlogger(logging.DEBUG)
2082
else:
2083
if not debuglevel:
2084
initlogger()
2085
else:
2086
level = getattr(logging, debuglevel.upper())
2087
initlogger(level)
722
if not debug:
723
syslogger.setLevel(logging.WARNING)
724
console.setLevel(logging.WARNING)
2088
725
2089
726
if server_settings["servicename"] != "Mandos":
2090
syslogger.setFormatter(logging.Formatter
2091
('Mandos (%s) [%%(process)d]:'
2092
' %%(levelname)s: %%(message)s'
727
syslogger.setFormatter(logging.Formatter\
728
('Mandos (%s): %%(levelname)s:'
729
' %%(message)s'
2093
730
% server_settings["servicename"]))
2094
731
2095
732
# Parse config file with clients
2096
client_config = configparser.SafeConfigParser(Client.client_defaults)
733
client_defaults = { "timeout": "1h",
734
"interval": "5m",
735
"checker": "fping -q -- %%(host)s",
736
}
737
client_config = ConfigParser.SafeConfigParser(client_defaults)
2097
738
client_config.read(os.path.join(server_settings["configdir"],
2098
739
"clients.conf"))
2099
740
2100
global mandos_dbus_service
2101
mandos_dbus_service = None
2102
2103
tcp_server = MandosServer((server_settings["address"],
2104
server_settings["port"]),
2105
ClientHandler,
2106
interface=(server_settings["interface"]
2107
or None),
2108
use_ipv6=use_ipv6,
2109
gnutls_priority=
2110
server_settings["priority"],
2111
use_dbus=use_dbus)
2112
if not debug:
2113
pidfilename = "/var/run/mandos.pid"
2114
try:
2115
pidfile = open(pidfilename, "w")
2116
except IOError:
2117
logger.error("Could not open file %r", pidfilename)
2118
2119
try:
2120
uid = pwd.getpwnam("_mandos").pw_uid
2121
gid = pwd.getpwnam("_mandos").pw_gid
2122
except KeyError:
2123
try:
2124
uid = pwd.getpwnam("mandos").pw_uid
2125
gid = pwd.getpwnam("mandos").pw_gid
2126
except KeyError:
2127
try:
2128
uid = pwd.getpwnam("nobody").pw_uid
2129
gid = pwd.getpwnam("nobody").pw_gid
2130
except KeyError:
2131
uid = 65534
2132
gid = 65534
2133
try:
2134
os.setgid(gid)
2135
os.setuid(uid)
2136
except OSError as error:
2137
if error[0] != errno.EPERM:
2138
raise error
2139
2140
if debug:
2141
# Enable all possible GnuTLS debugging
2142
2143
# "Use a log level over 10 to enable all debugging options."
2144
# - GnuTLS manual
2145
gnutls.library.functions.gnutls_global_set_log_level(11)
2146
2147
@gnutls.library.types.gnutls_log_func
2148
def debug_gnutls(level, string):
2149
logger.debug("GnuTLS: %s", string[:-1])
2150
2151
(gnutls.library.functions
2152
.gnutls_global_set_log_function(debug_gnutls))
2153
2154
# Redirect stdin so all checkers get /dev/null
2155
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2156
os.dup2(null, sys.stdin.fileno())
2157
if null > 2:
2158
os.close(null)
2159
else:
2160
# No console logging
2161
logger.removeHandler(console)
2162
2163
# Need to fork before connecting to D-Bus
2164
if not debug:
2165
# Close all input and output, do double fork, etc.
2166
daemon()
2167
2168
gobject.threads_init()
741
global service
742
service = AvahiService(name = server_settings["servicename"],
743
type = "_mandos._tcp", );
744
if server_settings["interface"]:
745
service.interface = if_nametoindex(server_settings["interface"])
2169
746
2170
747
global main_loop
748
global bus
749
global server
2171
750
# From the Avahi example code
2172
751
DBusGMainLoop(set_as_default=True )
2173
752
main_loop = gobject.MainLoop()
2174
753
bus = dbus.SystemBus()
754
server = dbus.Interface(
755
bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
756
avahi.DBUS_INTERFACE_SERVER )
2175
757
# End of Avahi example code
2176
if use_dbus:
2177
try:
2178
bus_name = dbus.service.BusName("se.recompile.Mandos",
2179
bus, do_not_queue=True)
2180
old_bus_name = (dbus.service.BusName
2181
("se.bsnet.fukt.Mandos", bus,
2182
do_not_queue=True))
2183
except dbus.exceptions.NameExistsException as e:
2184
logger.error(unicode(e) + ", disabling D-Bus")
2185
use_dbus = False
2186
server_settings["use_dbus"] = False
2187
tcp_server.use_dbus = False
2188
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2189
service = AvahiServiceToSyslog(name =
2190
server_settings["servicename"],
2191
servicetype = "_mandos._tcp",
2192
protocol = protocol, bus = bus)
2193
if server_settings["interface"]:
2194
service.interface = (if_nametoindex
2195
(str(server_settings["interface"])))
2196
2197
global multiprocessing_manager
2198
multiprocessing_manager = multiprocessing.Manager()
2199
2200
client_class = Client
2201
if use_dbus:
2202
client_class = functools.partial(ClientDBusTransitional,
2203
bus = bus)
2204
2205
client_settings = Client.config_parser(client_config)
2206
old_client_settings = {}
2207
clients_data = {}
2208
2209
# Get client data and settings from last running state.
2210
if server_settings["restore"]:
2211
try:
2212
with open(stored_state_path, "rb") as stored_state:
2213
clients_data, old_client_settings = (pickle.load
2214
(stored_state))
2215
os.remove(stored_state_path)
2216
except IOError as e:
2217
logger.warning("Could not load persistent state: {0}"
2218
.format(e))
2219
if e.errno != errno.ENOENT:
2220
raise
2221
except EOFError as e:
2222
logger.warning("Could not load persistent state: "
2223
"EOFError: {0}".format(e))
2224
2225
with PGPEngine() as pgp:
2226
for client_name, client in clients_data.iteritems():
2227
# Decide which value to use after restoring saved state.
2228
# We have three different values: Old config file,
2229
# new config file, and saved state.
2230
# New config value takes precedence if it differs from old
2231
# config value, otherwise use saved state.
2232
for name, value in client_settings[client_name].items():
2233
try:
2234
# For each value in new config, check if it
2235
# differs from the old config value (Except for
2236
# the "secret" attribute)
2237
if (name != "secret" and
2238
value != old_client_settings[client_name]
2239
[name]):
2240
client[name] = value
2241
except KeyError:
2242
pass
2243
2244
# Clients who has passed its expire date can still be
2245
# enabled if its last checker was successful. Clients
2246
# whose checker failed before we stored its state is
2247
# assumed to have failed all checkers during downtime.
2248
if client["enabled"]:
2249
if datetime.datetime.utcnow() >= client["expires"]:
2250
if not client["last_checked_ok"]:
2251
logger.warning(
2252
"disabling client {0} - Client never "
2253
"performed a successfull checker"
2254
.format(client["name"]))
2255
client["enabled"] = False
2256
elif client["last_checker_status"] != 0:
2257
logger.warning(
2258
"disabling client {0} - Client "
2259
"last checker failed with error code {1}"
2260
.format(client["name"],
2261
client["last_checker_status"]))
2262
client["enabled"] = False
2263
else:
2264
client["expires"] = (datetime.datetime
2265
.utcnow()
2266
+ client["timeout"])
2267
2268
try:
2269
client["secret"] = (
2270
pgp.decrypt(client["encrypted_secret"],
2271
client_settings[client_name]
2272
["secret"]))
2273
except PGPError:
2274
# If decryption fails, we use secret from new settings
2275
logger.debug("Failed to decrypt {0} old secret"
2276
.format(client_name))
2277
client["secret"] = (
2278
client_settings[client_name]["secret"])
2279
2280
2281
# Add/remove clients based on new changes made to config
2282
for client_name in set(old_client_settings) - set(client_settings):
2283
del clients_data[client_name]
2284
for client_name in set(client_settings) - set(old_client_settings):
2285
clients_data[client_name] = client_settings[client_name]
2286
2287
# Create clients all clients
2288
for client_name, client in clients_data.iteritems():
2289
tcp_server.clients[client_name] = client_class(
2290
name = client_name, settings = client)
2291
2292
if not tcp_server.clients:
2293
logger.warning("No clients defined")
758
759
clients = Set()
760
def remove_from_clients(client):
761
clients.remove(client)
762
if not clients:
763
logger.critical(u"No clients left, exiting")
764
sys.exit()
765
766
clients.update(Set(Client(name = section,
767
stop_hook = remove_from_clients,
768
config
769
= dict(client_config.items(section)))
770
for section in client_config.sections()))
771
if not clients:
772
logger.critical(u"No clients defined")
773
sys.exit(1)
774
775
if not debug:
776
logger.removeHandler(console)
777
daemon()
778
779
pidfilename = "/var/run/mandos/mandos.pid"
780
pid = os.getpid()
781
try:
782
pidfile = open(pidfilename, "w")
783
pidfile.write(str(pid) + "\n")
784
pidfile.close()
785
del pidfile
786
except IOError, err:
787
logger.error(u"Could not write %s file with PID %d",
788
pidfilename, os.getpid())
789
790
def cleanup():
791
"Cleanup function; run on exit"
792
global group
793
# From the Avahi example code
794
if not group is None:
795
group.Free()
796
group = None
797
# End of Avahi example code
2294
798
799
while clients:
800
client = clients.pop()
801
client.stop_hook = None
802
client.stop()
803
804
atexit.register(cleanup)
805
2295
806
if not debug:
2296
try:
2297
with pidfile:
2298
pid = os.getpid()
2299
pidfile.write(str(pid) + "\n".encode("utf-8"))
2300
del pidfile
2301
except IOError:
2302
logger.error("Could not write to file %r with PID %d",
2303
pidfilename, pid)
2304
except NameError:
2305
# "pidfile" was never created
2306
pass
2307
del pidfilename
2308
807
signal.signal(signal.SIGINT, signal.SIG_IGN)
2309
2310
808
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2311
809
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2312
810
2313
if use_dbus:
2314
class MandosDBusService(dbus.service.Object):
2315
"""A D-Bus proxy object"""
2316
def __init__(self):
2317
dbus.service.Object.__init__(self, bus, "/")
2318
_interface = "se.recompile.Mandos"
2319
2320
@dbus.service.signal(_interface, signature="o")
2321
def ClientAdded(self, objpath):
2322
"D-Bus signal"
2323
pass
2324
2325
@dbus.service.signal(_interface, signature="ss")
2326
def ClientNotFound(self, fingerprint, address):
2327
"D-Bus signal"
2328
pass
2329
2330
@dbus.service.signal(_interface, signature="os")
2331
def ClientRemoved(self, objpath, name):
2332
"D-Bus signal"
2333
pass
2334
2335
@dbus.service.method(_interface, out_signature="ao")
2336
def GetAllClients(self):
2337
"D-Bus method"
2338
return dbus.Array(c.dbus_object_path
2339
for c in
2340
tcp_server.clients.itervalues())
2341
2342
@dbus.service.method(_interface,
2343
out_signature="a{oa{sv}}")
2344
def GetAllClientsWithProperties(self):
2345
"D-Bus method"
2346
return dbus.Dictionary(
2347
((c.dbus_object_path, c.GetAll(""))
2348
for c in tcp_server.clients.itervalues()),
2349
signature="oa{sv}")
2350
2351
@dbus.service.method(_interface, in_signature="o")
2352
def RemoveClient(self, object_path):
2353
"D-Bus method"
2354
for c in tcp_server.clients.itervalues():
2355
if c.dbus_object_path == object_path:
2356
del tcp_server.clients[c.name]
2357
c.remove_from_connection()
2358
# Don't signal anything except ClientRemoved
2359
c.disable(quiet=True)
2360
# Emit D-Bus signal
2361
self.ClientRemoved(object_path, c.name)
2362
return
2363
raise KeyError(object_path)
2364
2365
del _interface
2366
2367
class MandosDBusServiceTransitional(MandosDBusService):
2368
__metaclass__ = AlternateDBusNamesMetaclass
2369
mandos_dbus_service = MandosDBusServiceTransitional()
2370
2371
def cleanup():
2372
"Cleanup function; run on exit"
2373
service.cleanup()
2374
2375
multiprocessing.active_children()
2376
if not (tcp_server.clients or client_settings):
2377
return
2378
2379
# Store client before exiting. Secrets are encrypted with key
2380
# based on what config file has. If config file is
2381
# removed/edited, old secret will thus be unrecovable.
2382
clients = {}
2383
with PGPEngine() as pgp:
2384
for client in tcp_server.clients.itervalues():
2385
key = client_settings[client.name]["secret"]
2386
client.encrypted_secret = pgp.encrypt(client.secret,
2387
key)
2388
client_dict = {}
2389
2390
# A list of attributes that can not be pickled
2391
# + secret.
2392
exclude = set(("bus", "changedstate", "secret",
2393
"checker"))
2394
for name, typ in (inspect.getmembers
2395
(dbus.service.Object)):
2396
exclude.add(name)
2397
2398
client_dict["encrypted_secret"] = (client
2399
.encrypted_secret)
2400
for attr in client.client_structure:
2401
if attr not in exclude:
2402
client_dict[attr] = getattr(client, attr)
2403
2404
clients[client.name] = client_dict
2405
del client_settings[client.name]["secret"]
2406
2407
try:
2408
with os.fdopen(os.open(stored_state_path,
2409
(os.O_CREAT | os.O_WRONLY
2410
| os.O_TRUNC | os.O_EXCL),
2411
(stat.S_IREAD | stat.S_IWRITE)),
2412
"wb") as stored_state:
2413
pickle.dump((clients, client_settings), stored_state)
2414
except (IOError, OSError) as e:
2415
logger.warning("Could not save persistent state: {0}"
2416
.format(e))
2417
if e.errno not in set((errno.ENOENT, errno.EACCES,
2418
errno.EEXIST)):
2419
raise
2420
2421
# Delete all clients, and settings from config
2422
while tcp_server.clients:
2423
name, client = tcp_server.clients.popitem()
2424
if use_dbus:
2425
client.remove_from_connection()
2426
# Don't signal anything except ClientRemoved
2427
client.disable(quiet=True)
2428
if use_dbus:
2429
# Emit D-Bus signal
2430
mandos_dbus_service.ClientRemoved(client
2431
.dbus_object_path,
2432
client.name)
2433
client_settings.clear()
2434
2435
atexit.register(cleanup)
2436
2437
for client in tcp_server.clients.itervalues():
2438
if use_dbus:
2439
# Emit D-Bus signal
2440
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2441
# Need to initiate checking of clients
2442
if client.enabled:
2443
client.init_checker()
2444
2445
tcp_server.enable()
2446
tcp_server.server_activate()
2447
811
for client in clients:
812
client.start()
813
814
tcp_server = IPv6_TCPServer((server_settings["address"],
815
server_settings["port"]),
816
tcp_handler,
817
settings=server_settings,
818
clients=clients)
2448
819
# Find out what port we got
2449
820
service.port = tcp_server.socket.getsockname()[1]
2450
if use_ipv6:
2451
logger.info("Now listening on address %r, port %d,"
2452
" flowinfo %d, scope_id %d"
2453
% tcp_server.socket.getsockname())
2454
else: # IPv4
2455
logger.info("Now listening on address %r, port %d"
2456
% tcp_server.socket.getsockname())
821
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
822
u" scope_id %d" % tcp_server.socket.getsockname())
2457
823
2458
824
#service.interface = tcp_server.socket.getsockname()[3]
2459
825
2460
826
try:
2461
827
# From the Avahi example code
828
server.connect_to_signal("StateChanged", server_state_changed)
2462
829
try:
2463
service.activate()
2464
except dbus.exceptions.DBusException as error:
2465
logger.critical("DBusException: %s", error)
2466
cleanup()
830
server_state_changed(server.GetState())
831
except dbus.exceptions.DBusException, error:
832
logger.critical(u"DBusException: %s", error)
2467
833
sys.exit(1)
2468
834
# End of Avahi example code
2469
835
2470
836
gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2471
837
lambda *args, **kwargs:
2472
(tcp_server.handle_request
2473
(*args[2:], **kwargs) or True))
838
tcp_server.handle_request\
839
(*args[2:], **kwargs) or True)
2474
840
2475
logger.debug("Starting main loop")
841
logger.debug(u"Starting main loop")
842
main_loop_started = True
2476
843
main_loop.run()
2477
except AvahiError as error:
2478
logger.critical("AvahiError: %s", error)
2479
cleanup()
844
except AvahiError, error:
845
logger.critical(u"AvahiError: %s" + unicode(error))
2480
846
sys.exit(1)
2481
847
except KeyboardInterrupt:
2482
848
if debug:
2483
print("", file=sys.stderr)
2484
logger.debug("Server received KeyboardInterrupt")
2485
logger.debug("Server exiting")
2486
# Must run before the D-Bus bus name gets deregistered
2487
cleanup()
849
print
2488
850
2489
851
if __name__ == '__main__':
2490
852
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0