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- Committer: Teddy Hogeborn
- Date: 2012-01-01 05:42:51 UTC
- mfrom: (237.4.22 release)
- Revision ID: teddy@recompile.se-20120101054251-26jflhej4znq2mzq
Merge from release branch.
- files added:
- DBUS-API
- debian/source
- network-hooks.d
- files modified:
- .bzrignore
added
removed
mandos
6
6
# This program is partly derived from an example program for an Avahi
7
7
# service publisher, downloaded from
8
8
# <http://avahi.org/wiki/PythonPublishExample>. This includes the
9
# methods "add" and "remove" in the "AvahiService" class, the
10
# "server_state_changed" and "entry_group_state_changed" functions,
11
# and some lines in "main".
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".
12
12
#
13
13
# Everything else is
14
# Copyright © 2008,2009 Teddy Hogeborn
15
# Copyright © 2008,2009 Björn Påhlsson
14
# Copyright © 2008-2012 Teddy Hogeborn
15
# Copyright © 2008-2012 Björn Påhlsson
16
16
#
17
17
# This program is free software: you can redistribute it and/or modify
18
18
# it under the terms of the GNU General Public License as published by
28
28
# along with this program. If not, see
29
29
# <http://www.gnu.org/licenses/>.
30
30
#
31
# Contact the authors at <mandos@fukt.bsnet.se>.
31
# Contact the authors at <mandos@recompile.se>.
32
32
#
33
33
34
from __future__ import division, with_statement, absolute_import
34
from __future__ import (division, absolute_import, print_function,
35
unicode_literals)
35
36
36
import SocketServer
37
import SocketServer as socketserver
37
38
import socket
38
import optparse
39
import argparse
39
40
import datetime
40
41
import errno
41
42
import gnutls.crypto
44
45
import gnutls.library.functions
45
46
import gnutls.library.constants
46
47
import gnutls.library.types
47
import ConfigParser
48
import ConfigParser as configparser
48
49
import sys
49
50
import re
50
51
import os
51
52
import signal
52
from sets import Set
53
53
import subprocess
54
54
import atexit
55
55
import stat
56
56
import logging
57
57
import logging.handlers
58
58
import pwd
59
from contextlib import closing
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
60
68
61
69
import dbus
62
70
import dbus.service
65
73
from dbus.mainloop.glib import DBusGMainLoop
66
74
import ctypes
67
75
import ctypes.util
68
69
version = "1.0.3"
70
71
logger = logging.Logger('mandos')
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 = "1.5.0"
89
stored_state_file = "clients.pickle"
90
91
logger = logging.getLogger()
72
92
syslogger = (logging.handlers.SysLogHandler
73
93
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
74
address = "/dev/log"))
75
syslogger.setFormatter(logging.Formatter
76
('Mandos: %(levelname)s: %(message)s'))
77
logger.addHandler(syslogger)
78
79
console = logging.StreamHandler()
80
console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
81
' %(message)s'))
82
logger.addHandler(console)
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(debug, 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
if debug:
122
console = logging.StreamHandler()
123
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
124
' [%(process)d]:'
125
' %(levelname)s:'
126
' %(message)s'))
127
logger.addHandler(console)
128
logger.setLevel(level)
129
130
131
class PGPError(Exception):
132
"""Exception if encryption/decryption fails"""
133
pass
134
135
136
class PGPEngine(object):
137
"""A simple class for OpenPGP symmetric encryption & decryption"""
138
def __init__(self):
139
self.gnupg = GnuPGInterface.GnuPG()
140
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
141
self.gnupg = GnuPGInterface.GnuPG()
142
self.gnupg.options.meta_interactive = False
143
self.gnupg.options.homedir = self.tempdir
144
self.gnupg.options.extra_args.extend(['--force-mdc',
145
'--quiet',
146
'--no-use-agent'])
147
148
def __enter__(self):
149
return self
150
151
def __exit__ (self, exc_type, exc_value, traceback):
152
self._cleanup()
153
return False
154
155
def __del__(self):
156
self._cleanup()
157
158
def _cleanup(self):
159
if self.tempdir is not None:
160
# Delete contents of tempdir
161
for root, dirs, files in os.walk(self.tempdir,
162
topdown = False):
163
for filename in files:
164
os.remove(os.path.join(root, filename))
165
for dirname in dirs:
166
os.rmdir(os.path.join(root, dirname))
167
# Remove tempdir
168
os.rmdir(self.tempdir)
169
self.tempdir = None
170
171
def password_encode(self, password):
172
# Passphrase can not be empty and can not contain newlines or
173
# NUL bytes. So we prefix it and hex encode it.
174
return b"mandos" + binascii.hexlify(password)
175
176
def encrypt(self, data, password):
177
self.gnupg.passphrase = self.password_encode(password)
178
with open(os.devnull) as devnull:
179
try:
180
proc = self.gnupg.run(['--symmetric'],
181
create_fhs=['stdin', 'stdout'],
182
attach_fhs={'stderr': devnull})
183
with contextlib.closing(proc.handles['stdin']) as f:
184
f.write(data)
185
with contextlib.closing(proc.handles['stdout']) as f:
186
ciphertext = f.read()
187
proc.wait()
188
except IOError as e:
189
raise PGPError(e)
190
self.gnupg.passphrase = None
191
return ciphertext
192
193
def decrypt(self, data, password):
194
self.gnupg.passphrase = self.password_encode(password)
195
with open(os.devnull) as devnull:
196
try:
197
proc = self.gnupg.run(['--decrypt'],
198
create_fhs=['stdin', 'stdout'],
199
attach_fhs={'stderr': devnull})
200
with contextlib.closing(proc.handles['stdin'] ) as f:
201
f.write(data)
202
with contextlib.closing(proc.handles['stdout']) as f:
203
decrypted_plaintext = f.read()
204
proc.wait()
205
except IOError as e:
206
raise PGPError(e)
207
self.gnupg.passphrase = None
208
return decrypted_plaintext
209
210
83
211
84
212
class AvahiError(Exception):
85
213
def __init__(self, value, *args, **kwargs):
97
225
98
226
class AvahiService(object):
99
227
"""An Avahi (Zeroconf) service.
228
100
229
Attributes:
101
230
interface: integer; avahi.IF_UNSPEC or an interface index.
102
231
Used to optionally bind to the specified interface.
110
239
max_renames: integer; maximum number of renames
111
240
rename_count: integer; counter so we only rename after collisions
112
241
a sensible number of times
242
group: D-Bus Entry Group
243
server: D-Bus Server
244
bus: dbus.SystemBus()
113
245
"""
114
246
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
115
247
servicetype = None, port = None, TXT = None,
116
domain = "", host = "", max_renames = 32768):
248
domain = "", host = "", max_renames = 32768,
249
protocol = avahi.PROTO_UNSPEC, bus = None):
117
250
self.interface = interface
118
251
self.name = name
119
252
self.type = servicetype
123
256
self.host = host
124
257
self.rename_count = 0
125
258
self.max_renames = max_renames
259
self.protocol = protocol
260
self.group = None # our entry group
261
self.server = None
262
self.bus = bus
263
self.entry_group_state_changed_match = None
126
264
def rename(self):
127
265
"""Derived from the Avahi example code"""
128
266
if self.rename_count >= self.max_renames:
129
logger.critical(u"No suitable Zeroconf service name found"
130
u" after %i retries, exiting.",
267
logger.critical("No suitable Zeroconf service name found"
268
" after %i retries, exiting.",
131
269
self.rename_count)
132
raise AvahiServiceError(u"Too many renames")
133
self.name = server.GetAlternativeServiceName(self.name)
134
logger.info(u"Changing Zeroconf service name to %r ...",
135
str(self.name))
136
syslogger.setFormatter(logging.Formatter
137
('Mandos (%s): %%(levelname)s:'
138
' %%(message)s' % self.name))
270
raise AvahiServiceError("Too many renames")
271
self.name = unicode(self.server
272
.GetAlternativeServiceName(self.name))
273
logger.info("Changing Zeroconf service name to %r ...",
274
self.name)
139
275
self.remove()
140
self.add()
276
try:
277
self.add()
278
except dbus.exceptions.DBusException as error:
279
logger.critical("DBusException: %s", error)
280
self.cleanup()
281
os._exit(1)
141
282
self.rename_count += 1
142
283
def remove(self):
143
284
"""Derived from the Avahi example code"""
144
if group is not None:
145
group.Reset()
285
if self.entry_group_state_changed_match is not None:
286
self.entry_group_state_changed_match.remove()
287
self.entry_group_state_changed_match = None
288
if self.group is not None:
289
self.group.Reset()
146
290
def add(self):
147
291
"""Derived from the Avahi example code"""
148
global group
149
if group is None:
150
group = dbus.Interface(bus.get_object
151
(avahi.DBUS_NAME,
152
server.EntryGroupNew()),
153
avahi.DBUS_INTERFACE_ENTRY_GROUP)
154
group.connect_to_signal('StateChanged',
155
entry_group_state_changed)
156
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
157
service.name, service.type)
158
group.AddService(
159
self.interface, # interface
160
avahi.PROTO_INET6, # protocol
161
dbus.UInt32(0), # flags
162
self.name, self.type,
163
self.domain, self.host,
164
dbus.UInt16(self.port),
165
avahi.string_array_to_txt_array(self.TXT))
166
group.Commit()
167
168
# From the Avahi example code:
169
group = None # our entry group
170
# End of Avahi example code
171
172
173
def _datetime_to_dbus(dt, variant_level=0):
174
"""Convert a UTC datetime.datetime() to a D-Bus type."""
175
return dbus.String(dt.isoformat(), variant_level=variant_level)
176
177
178
class Client(dbus.service.Object):
292
self.remove()
293
if self.group is None:
294
self.group = dbus.Interface(
295
self.bus.get_object(avahi.DBUS_NAME,
296
self.server.EntryGroupNew()),
297
avahi.DBUS_INTERFACE_ENTRY_GROUP)
298
self.entry_group_state_changed_match = (
299
self.group.connect_to_signal(
300
'StateChanged', self.entry_group_state_changed))
301
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
302
self.name, self.type)
303
self.group.AddService(
304
self.interface,
305
self.protocol,
306
dbus.UInt32(0), # flags
307
self.name, self.type,
308
self.domain, self.host,
309
dbus.UInt16(self.port),
310
avahi.string_array_to_txt_array(self.TXT))
311
self.group.Commit()
312
def entry_group_state_changed(self, state, error):
313
"""Derived from the Avahi example code"""
314
logger.debug("Avahi entry group state change: %i", state)
315
316
if state == avahi.ENTRY_GROUP_ESTABLISHED:
317
logger.debug("Zeroconf service established.")
318
elif state == avahi.ENTRY_GROUP_COLLISION:
319
logger.info("Zeroconf service name collision.")
320
self.rename()
321
elif state == avahi.ENTRY_GROUP_FAILURE:
322
logger.critical("Avahi: Error in group state changed %s",
323
unicode(error))
324
raise AvahiGroupError("State changed: %s"
325
% unicode(error))
326
def cleanup(self):
327
"""Derived from the Avahi example code"""
328
if self.group is not None:
329
try:
330
self.group.Free()
331
except (dbus.exceptions.UnknownMethodException,
332
dbus.exceptions.DBusException):
333
pass
334
self.group = None
335
self.remove()
336
def server_state_changed(self, state, error=None):
337
"""Derived from the Avahi example code"""
338
logger.debug("Avahi server state change: %i", state)
339
bad_states = { avahi.SERVER_INVALID:
340
"Zeroconf server invalid",
341
avahi.SERVER_REGISTERING: None,
342
avahi.SERVER_COLLISION:
343
"Zeroconf server name collision",
344
avahi.SERVER_FAILURE:
345
"Zeroconf server failure" }
346
if state in bad_states:
347
if bad_states[state] is not None:
348
if error is None:
349
logger.error(bad_states[state])
350
else:
351
logger.error(bad_states[state] + ": %r", error)
352
self.cleanup()
353
elif state == avahi.SERVER_RUNNING:
354
self.add()
355
else:
356
if error is None:
357
logger.debug("Unknown state: %r", state)
358
else:
359
logger.debug("Unknown state: %r: %r", state, error)
360
def activate(self):
361
"""Derived from the Avahi example code"""
362
if self.server is None:
363
self.server = dbus.Interface(
364
self.bus.get_object(avahi.DBUS_NAME,
365
avahi.DBUS_PATH_SERVER,
366
follow_name_owner_changes=True),
367
avahi.DBUS_INTERFACE_SERVER)
368
self.server.connect_to_signal("StateChanged",
369
self.server_state_changed)
370
self.server_state_changed(self.server.GetState())
371
372
class AvahiServiceToSyslog(AvahiService):
373
def rename(self):
374
"""Add the new name to the syslog messages"""
375
ret = AvahiService.rename(self)
376
syslogger.setFormatter(logging.Formatter
377
('Mandos (%s) [%%(process)d]:'
378
' %%(levelname)s: %%(message)s'
379
% self.name))
380
return ret
381
382
def timedelta_to_milliseconds(td):
383
"Convert a datetime.timedelta() to milliseconds"
384
return ((td.days * 24 * 60 * 60 * 1000)
385
+ (td.seconds * 1000)
386
+ (td.microseconds // 1000))
387
388
class Client(object):
179
389
"""A representation of a client host served by this server.
390
180
391
Attributes:
181
name: string; from the config file, used in log messages
392
approved: bool(); 'None' if not yet approved/disapproved
393
approval_delay: datetime.timedelta(); Time to wait for approval
394
approval_duration: datetime.timedelta(); Duration of one approval
395
checker: subprocess.Popen(); a running checker process used
396
to see if the client lives.
397
'None' if no process is running.
398
checker_callback_tag: a gobject event source tag, or None
399
checker_command: string; External command which is run to check
400
if client lives. %() expansions are done at
401
runtime with vars(self) as dict, so that for
402
instance %(name)s can be used in the command.
403
checker_initiator_tag: a gobject event source tag, or None
404
created: datetime.datetime(); (UTC) object creation
405
client_structure: Object describing what attributes a client has
406
and is used for storing the client at exit
407
current_checker_command: string; current running checker_command
408
disable_initiator_tag: a gobject event source tag, or None
409
enabled: bool()
182
410
fingerprint: string (40 or 32 hexadecimal digits); used to
183
411
uniquely identify the client
184
secret: bytestring; sent verbatim (over TLS) to client
185
412
host: string; available for use by the checker command
186
created: datetime.datetime(); (UTC) object creation
187
last_enabled: datetime.datetime(); (UTC)
188
enabled: bool()
413
interval: datetime.timedelta(); How often to start a new checker
414
last_approval_request: datetime.datetime(); (UTC) or None
189
415
last_checked_ok: datetime.datetime(); (UTC) or None
416
last_checker_status: integer between 0 and 255 reflecting exit
417
status of last checker. -1 reflects crashed
418
checker, or None.
419
last_enabled: datetime.datetime(); (UTC) or None
420
name: string; from the config file, used in log messages and
421
D-Bus identifiers
422
secret: bytestring; sent verbatim (over TLS) to client
190
423
timeout: datetime.timedelta(); How long from last_checked_ok
191
until this client is invalid
192
interval: datetime.timedelta(); How often to start a new checker
193
disable_hook: If set, called by disable() as disable_hook(self)
194
checker: subprocess.Popen(); a running checker process used
195
to see if the client lives.
196
'None' if no process is running.
197
checker_initiator_tag: a gobject event source tag, or None
198
disable_initiator_tag: - '' -
199
checker_callback_tag: - '' -
200
checker_command: string; External command which is run to check if
201
client lives. %() expansions are done at
202
runtime with vars(self) as dict, so that for
203
instance %(name)s can be used in the command.
204
use_dbus: bool(); Whether to provide D-Bus interface and signals
205
dbus_object_path: dbus.ObjectPath ; only set if self.use_dbus
424
until this client is disabled
425
extended_timeout: extra long timeout when password has been sent
426
runtime_expansions: Allowed attributes for runtime expansion.
427
expires: datetime.datetime(); time (UTC) when a client will be
428
disabled, or None
206
429
"""
430
431
runtime_expansions = ("approval_delay", "approval_duration",
432
"created", "enabled", "fingerprint",
433
"host", "interval", "last_checked_ok",
434
"last_enabled", "name", "timeout")
435
client_defaults = { "timeout": "5m",
436
"extended_timeout": "15m",
437
"interval": "2m",
438
"checker": "fping -q -- %%(host)s",
439
"host": "",
440
"approval_delay": "0s",
441
"approval_duration": "1s",
442
"approved_by_default": "True",
443
"enabled": "True",
444
}
445
207
446
def timeout_milliseconds(self):
208
447
"Return the 'timeout' attribute in milliseconds"
209
return ((self.timeout.days * 24 * 60 * 60 * 1000)
210
+ (self.timeout.seconds * 1000)
211
+ (self.timeout.microseconds // 1000))
448
return timedelta_to_milliseconds(self.timeout)
449
450
def extended_timeout_milliseconds(self):
451
"Return the 'extended_timeout' attribute in milliseconds"
452
return timedelta_to_milliseconds(self.extended_timeout)
212
453
213
454
def interval_milliseconds(self):
214
455
"Return the 'interval' attribute in milliseconds"
215
return ((self.interval.days * 24 * 60 * 60 * 1000)
216
+ (self.interval.seconds * 1000)
217
+ (self.interval.microseconds // 1000))
456
return timedelta_to_milliseconds(self.interval)
218
457
219
def __init__(self, name = None, disable_hook=None, config=None,
220
use_dbus=True):
458
def approval_delay_milliseconds(self):
459
return timedelta_to_milliseconds(self.approval_delay)
460
461
@staticmethod
462
def config_parser(config):
463
"""Construct a new dict of client settings of this form:
464
{ client_name: {setting_name: value, ...}, ...}
465
with exceptions for any special settings as defined above.
466
NOTE: Must be a pure function. Must return the same result
467
value given the same arguments.
468
"""
469
settings = {}
470
for client_name in config.sections():
471
section = dict(config.items(client_name))
472
client = settings[client_name] = {}
473
474
client["host"] = section["host"]
475
# Reformat values from string types to Python types
476
client["approved_by_default"] = config.getboolean(
477
client_name, "approved_by_default")
478
client["enabled"] = config.getboolean(client_name,
479
"enabled")
480
481
client["fingerprint"] = (section["fingerprint"].upper()
482
.replace(" ", ""))
483
if "secret" in section:
484
client["secret"] = section["secret"].decode("base64")
485
elif "secfile" in section:
486
with open(os.path.expanduser(os.path.expandvars
487
(section["secfile"])),
488
"rb") as secfile:
489
client["secret"] = secfile.read()
490
else:
491
raise TypeError("No secret or secfile for section %s"
492
% section)
493
client["timeout"] = string_to_delta(section["timeout"])
494
client["extended_timeout"] = string_to_delta(
495
section["extended_timeout"])
496
client["interval"] = string_to_delta(section["interval"])
497
client["approval_delay"] = string_to_delta(
498
section["approval_delay"])
499
client["approval_duration"] = string_to_delta(
500
section["approval_duration"])
501
client["checker_command"] = section["checker"]
502
client["last_approval_request"] = None
503
client["last_checked_ok"] = None
504
client["last_checker_status"] = None
505
506
return settings
507
508
509
def __init__(self, settings, name = None):
221
510
"""Note: the 'checker' key in 'config' sets the
222
511
'checker_command' attribute and *not* the 'checker'
223
512
attribute."""
224
513
self.name = name
225
if config is None:
226
config = {}
227
logger.debug(u"Creating client %r", self.name)
228
self.use_dbus = use_dbus
229
if self.use_dbus:
230
self.dbus_object_path = (dbus.ObjectPath
231
("/Mandos/clients/"
232
+ self.name.replace(".", "_")))
233
dbus.service.Object.__init__(self, bus,
234
self.dbus_object_path)
514
# adding all client settings
515
for setting, value in settings.iteritems():
516
setattr(self, setting, value)
517
518
if self.enabled:
519
if not hasattr(self, "last_enabled"):
520
self.last_enabled = datetime.datetime.utcnow()
521
if not hasattr(self, "expires"):
522
self.expires = (datetime.datetime.utcnow()
523
+ self.timeout)
524
else:
525
self.last_enabled = None
526
self.expires = None
527
528
logger.debug("Creating client %r", self.name)
235
529
# Uppercase and remove spaces from fingerprint for later
236
530
# comparison purposes with return value from the fingerprint()
237
531
# function
238
self.fingerprint = (config["fingerprint"].upper()
239
.replace(u" ", u""))
240
logger.debug(u" Fingerprint: %s", self.fingerprint)
241
if "secret" in config:
242
self.secret = config["secret"].decode(u"base64")
243
elif "secfile" in config:
244
with closing(open(os.path.expanduser
245
(os.path.expandvars
246
(config["secfile"])))) as secfile:
247
self.secret = secfile.read()
248
else:
249
raise TypeError(u"No secret or secfile for client %s"
250
% self.name)
251
self.host = config.get("host", "")
252
self.created = datetime.datetime.utcnow()
253
self.enabled = False
254
self.last_enabled = None
255
self.last_checked_ok = None
256
self.timeout = string_to_delta(config["timeout"])
257
self.interval = string_to_delta(config["interval"])
258
self.disable_hook = disable_hook
532
logger.debug(" Fingerprint: %s", self.fingerprint)
533
self.created = settings.get("created",
534
datetime.datetime.utcnow())
535
536
# attributes specific for this server instance
259
537
self.checker = None
260
538
self.checker_initiator_tag = None
261
539
self.disable_initiator_tag = None
262
540
self.checker_callback_tag = None
263
self.checker_command = config["checker"]
541
self.current_checker_command = None
542
self.approved = None
543
self.approvals_pending = 0
544
self.changedstate = (multiprocessing_manager
545
.Condition(multiprocessing_manager
546
.Lock()))
547
self.client_structure = [attr for attr in
548
self.__dict__.iterkeys()
549
if not attr.startswith("_")]
550
self.client_structure.append("client_structure")
551
552
for name, t in inspect.getmembers(type(self),
553
lambda obj:
554
isinstance(obj,
555
property)):
556
if not name.startswith("_"):
557
self.client_structure.append(name)
558
559
# Send notice to process children that client state has changed
560
def send_changedstate(self):
561
with self.changedstate:
562
self.changedstate.notify_all()
264
563
265
564
def enable(self):
266
565
"""Start this client's checker and timeout hooks"""
566
if getattr(self, "enabled", False):
567
# Already enabled
568
return
569
self.send_changedstate()
570
self.expires = datetime.datetime.utcnow() + self.timeout
571
self.enabled = True
267
572
self.last_enabled = datetime.datetime.utcnow()
573
self.init_checker()
574
575
def disable(self, quiet=True):
576
"""Disable this client."""
577
if not getattr(self, "enabled", False):
578
return False
579
if not quiet:
580
self.send_changedstate()
581
if not quiet:
582
logger.info("Disabling client %s", self.name)
583
if getattr(self, "disable_initiator_tag", False):
584
gobject.source_remove(self.disable_initiator_tag)
585
self.disable_initiator_tag = None
586
self.expires = None
587
if getattr(self, "checker_initiator_tag", False):
588
gobject.source_remove(self.checker_initiator_tag)
589
self.checker_initiator_tag = None
590
self.stop_checker()
591
self.enabled = False
592
# Do not run this again if called by a gobject.timeout_add
593
return False
594
595
def __del__(self):
596
self.disable()
597
598
def init_checker(self):
268
599
# Schedule a new checker to be started an 'interval' from now,
269
600
# and every interval from then on.
270
601
self.checker_initiator_tag = (gobject.timeout_add
271
602
(self.interval_milliseconds(),
272
603
self.start_checker))
273
# Also start a new checker *right now*.
274
self.start_checker()
275
604
# Schedule a disable() when 'timeout' has passed
276
605
self.disable_initiator_tag = (gobject.timeout_add
277
606
(self.timeout_milliseconds(),
278
607
self.disable))
279
self.enabled = True
280
if self.use_dbus:
281
# Emit D-Bus signals
282
self.PropertyChanged(dbus.String(u"enabled"),
283
dbus.Boolean(True, variant_level=1))
284
self.PropertyChanged(dbus.String(u"last_enabled"),
285
(_datetime_to_dbus(self.last_enabled,
286
variant_level=1)))
287
288
def disable(self):
289
"""Disable this client."""
290
if not getattr(self, "enabled", False):
291
return False
292
logger.info(u"Disabling client %s", self.name)
293
if getattr(self, "disable_initiator_tag", False):
294
gobject.source_remove(self.disable_initiator_tag)
295
self.disable_initiator_tag = None
296
if getattr(self, "checker_initiator_tag", False):
297
gobject.source_remove(self.checker_initiator_tag)
298
self.checker_initiator_tag = None
299
self.stop_checker()
300
if self.disable_hook:
301
self.disable_hook(self)
302
self.enabled = False
303
if self.use_dbus:
304
# Emit D-Bus signal
305
self.PropertyChanged(dbus.String(u"enabled"),
306
dbus.Boolean(False, variant_level=1))
307
# Do not run this again if called by a gobject.timeout_add
308
return False
309
310
def __del__(self):
311
self.disable_hook = None
312
self.disable()
608
# Also start a new checker *right now*.
609
self.start_checker()
313
610
314
611
def checker_callback(self, pid, condition, command):
315
612
"""The checker has completed, so take appropriate actions."""
316
613
self.checker_callback_tag = None
317
614
self.checker = None
318
if self.use_dbus:
319
# Emit D-Bus signal
320
self.PropertyChanged(dbus.String(u"checker_running"),
321
dbus.Boolean(False, variant_level=1))
322
if (os.WIFEXITED(condition)
323
and (os.WEXITSTATUS(condition) == 0)):
324
logger.info(u"Checker for %(name)s succeeded",
325
vars(self))
326
if self.use_dbus:
327
# Emit D-Bus signal
328
self.CheckerCompleted(dbus.Boolean(True),
329
dbus.UInt16(condition),
330
dbus.String(command))
331
self.bump_timeout()
332
elif not os.WIFEXITED(condition):
333
logger.warning(u"Checker for %(name)s crashed?",
615
if os.WIFEXITED(condition):
616
self.last_checker_status = os.WEXITSTATUS(condition)
617
if self.last_checker_status == 0:
618
logger.info("Checker for %(name)s succeeded",
619
vars(self))
620
self.checked_ok()
621
else:
622
logger.info("Checker for %(name)s failed",
623
vars(self))
624
else:
625
self.last_checker_status = -1
626
logger.warning("Checker for %(name)s crashed?",
334
627
vars(self))
335
if self.use_dbus:
336
# Emit D-Bus signal
337
self.CheckerCompleted(dbus.Boolean(False),
338
dbus.UInt16(condition),
339
dbus.String(command))
340
else:
341
logger.info(u"Checker for %(name)s failed",
342
vars(self))
343
if self.use_dbus:
344
# Emit D-Bus signal
345
self.CheckerCompleted(dbus.Boolean(False),
346
dbus.UInt16(condition),
347
dbus.String(command))
348
628
349
def bump_timeout(self):
629
def checked_ok(self, timeout=None):
350
630
"""Bump up the timeout for this client.
631
351
632
This should only be called when the client has been seen,
352
633
alive and well.
353
634
"""
635
if timeout is None:
636
timeout = self.timeout
354
637
self.last_checked_ok = datetime.datetime.utcnow()
355
gobject.source_remove(self.disable_initiator_tag)
356
self.disable_initiator_tag = (gobject.timeout_add
357
(self.timeout_milliseconds(),
358
self.disable))
359
if self.use_dbus:
360
# Emit D-Bus signal
361
self.PropertyChanged(
362
dbus.String(u"last_checked_ok"),
363
(_datetime_to_dbus(self.last_checked_ok,
364
variant_level=1)))
638
if self.disable_initiator_tag is not None:
639
gobject.source_remove(self.disable_initiator_tag)
640
if getattr(self, "enabled", False):
641
self.disable_initiator_tag = (gobject.timeout_add
642
(timedelta_to_milliseconds
643
(timeout), self.disable))
644
self.expires = datetime.datetime.utcnow() + timeout
645
646
def need_approval(self):
647
self.last_approval_request = datetime.datetime.utcnow()
365
648
366
649
def start_checker(self):
367
650
"""Start a new checker subprocess if one is not running.
651
368
652
If a checker already exists, leave it running and do
369
653
nothing."""
370
654
# The reason for not killing a running checker is that if we
373
657
# client would inevitably timeout, since no checker would get
374
658
# a chance to run to completion. If we instead leave running
375
659
# checkers alone, the checker would have to take more time
376
# than 'timeout' for the client to be declared invalid, which
377
# is as it should be.
660
# than 'timeout' for the client to be disabled, which is as it
661
# should be.
662
663
# If a checker exists, make sure it is not a zombie
664
try:
665
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
666
except (AttributeError, OSError) as error:
667
if (isinstance(error, OSError)
668
and error.errno != errno.ECHILD):
669
raise error
670
else:
671
if pid:
672
logger.warning("Checker was a zombie")
673
gobject.source_remove(self.checker_callback_tag)
674
self.checker_callback(pid, status,
675
self.current_checker_command)
676
# Start a new checker if needed
378
677
if self.checker is None:
379
678
try:
380
679
# In case checker_command has exactly one % operator
381
680
command = self.checker_command % self.host
382
681
except TypeError:
383
682
# Escape attributes for the shell
384
escaped_attrs = dict((key, re.escape(str(val)))
385
for key, val in
386
vars(self).iteritems())
683
escaped_attrs = dict(
684
(attr,
685
re.escape(unicode(str(getattr(self, attr, "")),
686
errors=
687
'replace')))
688
for attr in
689
self.runtime_expansions)
690
387
691
try:
388
692
command = self.checker_command % escaped_attrs
389
except TypeError, error:
390
logger.error(u'Could not format string "%s":'
391
u' %s', self.checker_command, error)
693
except TypeError as error:
694
logger.error('Could not format string "%s":'
695
' %s', self.checker_command, error)
392
696
return True # Try again later
697
self.current_checker_command = command
393
698
try:
394
logger.info(u"Starting checker %r for %s",
699
logger.info("Starting checker %r for %s",
395
700
command, self.name)
396
701
# We don't need to redirect stdout and stderr, since
397
702
# in normal mode, that is already done by daemon(),
400
705
self.checker = subprocess.Popen(command,
401
706
close_fds=True,
402
707
shell=True, cwd="/")
403
if self.use_dbus:
404
# Emit D-Bus signal
405
self.CheckerStarted(command)
406
self.PropertyChanged(
407
dbus.String("checker_running"),
408
dbus.Boolean(True, variant_level=1))
409
708
self.checker_callback_tag = (gobject.child_watch_add
410
709
(self.checker.pid,
411
710
self.checker_callback,
412
711
data=command))
413
except OSError, error:
414
logger.error(u"Failed to start subprocess: %s",
712
# The checker may have completed before the gobject
713
# watch was added. Check for this.
714
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
715
if pid:
716
gobject.source_remove(self.checker_callback_tag)
717
self.checker_callback(pid, status, command)
718
except OSError as error:
719
logger.error("Failed to start subprocess: %s",
415
720
error)
416
721
# Re-run this periodically if run by gobject.timeout_add
417
722
return True
423
728
self.checker_callback_tag = None
424
729
if getattr(self, "checker", None) is None:
425
730
return
426
logger.debug(u"Stopping checker for %(name)s", vars(self))
731
logger.debug("Stopping checker for %(name)s", vars(self))
427
732
try:
428
733
os.kill(self.checker.pid, signal.SIGTERM)
429
#os.sleep(0.5)
734
#time.sleep(0.5)
430
735
#if self.checker.poll() is None:
431
736
# os.kill(self.checker.pid, signal.SIGKILL)
432
except OSError, error:
737
except OSError as error:
433
738
if error.errno != errno.ESRCH: # No such process
434
739
raise
435
740
self.checker = None
436
if self.use_dbus:
437
self.PropertyChanged(dbus.String(u"checker_running"),
438
dbus.Boolean(False, variant_level=1))
439
440
def still_valid(self):
441
"""Has the timeout not yet passed for this client?"""
442
if not getattr(self, "enabled", False):
443
return False
444
now = datetime.datetime.utcnow()
445
if self.last_checked_ok is None:
446
return now < (self.created + self.timeout)
447
else:
448
return now < (self.last_checked_ok + self.timeout)
449
450
## D-Bus methods & signals
451
_interface = u"org.mandos_system.Mandos.Client"
452
453
# BumpTimeout - method
454
BumpTimeout = dbus.service.method(_interface)(bump_timeout)
455
BumpTimeout.__name__ = "BumpTimeout"
741
742
743
def dbus_service_property(dbus_interface, signature="v",
744
access="readwrite", byte_arrays=False):
745
"""Decorators for marking methods of a DBusObjectWithProperties to
746
become properties on the D-Bus.
747
748
The decorated method will be called with no arguments by "Get"
749
and with one argument by "Set".
750
751
The parameters, where they are supported, are the same as
752
dbus.service.method, except there is only "signature", since the
753
type from Get() and the type sent to Set() is the same.
754
"""
755
# Encoding deeply encoded byte arrays is not supported yet by the
756
# "Set" method, so we fail early here:
757
if byte_arrays and signature != "ay":
758
raise ValueError("Byte arrays not supported for non-'ay'"
759
" signature %r" % signature)
760
def decorator(func):
761
func._dbus_is_property = True
762
func._dbus_interface = dbus_interface
763
func._dbus_signature = signature
764
func._dbus_access = access
765
func._dbus_name = func.__name__
766
if func._dbus_name.endswith("_dbus_property"):
767
func._dbus_name = func._dbus_name[:-14]
768
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
769
return func
770
return decorator
771
772
773
class DBusPropertyException(dbus.exceptions.DBusException):
774
"""A base class for D-Bus property-related exceptions
775
"""
776
def __unicode__(self):
777
return unicode(str(self))
778
779
780
class DBusPropertyAccessException(DBusPropertyException):
781
"""A property's access permissions disallows an operation.
782
"""
783
pass
784
785
786
class DBusPropertyNotFound(DBusPropertyException):
787
"""An attempt was made to access a non-existing property.
788
"""
789
pass
790
791
792
class DBusObjectWithProperties(dbus.service.Object):
793
"""A D-Bus object with properties.
794
795
Classes inheriting from this can use the dbus_service_property
796
decorator to expose methods as D-Bus properties. It exposes the
797
standard Get(), Set(), and GetAll() methods on the D-Bus.
798
"""
799
800
@staticmethod
801
def _is_dbus_property(obj):
802
return getattr(obj, "_dbus_is_property", False)
803
804
def _get_all_dbus_properties(self):
805
"""Returns a generator of (name, attribute) pairs
806
"""
807
return ((prop.__get__(self)._dbus_name, prop.__get__(self))
808
for cls in self.__class__.__mro__
809
for name, prop in
810
inspect.getmembers(cls, self._is_dbus_property))
811
812
def _get_dbus_property(self, interface_name, property_name):
813
"""Returns a bound method if one exists which is a D-Bus
814
property with the specified name and interface.
815
"""
816
for cls in self.__class__.__mro__:
817
for name, value in (inspect.getmembers
818
(cls, self._is_dbus_property)):
819
if (value._dbus_name == property_name
820
and value._dbus_interface == interface_name):
821
return value.__get__(self)
822
823
# No such property
824
raise DBusPropertyNotFound(self.dbus_object_path + ":"
825
+ interface_name + "."
826
+ property_name)
827
828
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
829
out_signature="v")
830
def Get(self, interface_name, property_name):
831
"""Standard D-Bus property Get() method, see D-Bus standard.
832
"""
833
prop = self._get_dbus_property(interface_name, property_name)
834
if prop._dbus_access == "write":
835
raise DBusPropertyAccessException(property_name)
836
value = prop()
837
if not hasattr(value, "variant_level"):
838
return value
839
return type(value)(value, variant_level=value.variant_level+1)
840
841
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
842
def Set(self, interface_name, property_name, value):
843
"""Standard D-Bus property Set() method, see D-Bus standard.
844
"""
845
prop = self._get_dbus_property(interface_name, property_name)
846
if prop._dbus_access == "read":
847
raise DBusPropertyAccessException(property_name)
848
if prop._dbus_get_args_options["byte_arrays"]:
849
# The byte_arrays option is not supported yet on
850
# signatures other than "ay".
851
if prop._dbus_signature != "ay":
852
raise ValueError
853
value = dbus.ByteArray(b''.join(chr(byte)
854
for byte in value))
855
prop(value)
856
857
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
858
out_signature="a{sv}")
859
def GetAll(self, interface_name):
860
"""Standard D-Bus property GetAll() method, see D-Bus
861
standard.
862
863
Note: Will not include properties with access="write".
864
"""
865
properties = {}
866
for name, prop in self._get_all_dbus_properties():
867
if (interface_name
868
and interface_name != prop._dbus_interface):
869
# Interface non-empty but did not match
870
continue
871
# Ignore write-only properties
872
if prop._dbus_access == "write":
873
continue
874
value = prop()
875
if not hasattr(value, "variant_level"):
876
properties[name] = value
877
continue
878
properties[name] = type(value)(value, variant_level=
879
value.variant_level+1)
880
return dbus.Dictionary(properties, signature="sv")
881
882
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
883
out_signature="s",
884
path_keyword='object_path',
885
connection_keyword='connection')
886
def Introspect(self, object_path, connection):
887
"""Standard D-Bus method, overloaded to insert property tags.
888
"""
889
xmlstring = dbus.service.Object.Introspect(self, object_path,
890
connection)
891
try:
892
document = xml.dom.minidom.parseString(xmlstring)
893
def make_tag(document, name, prop):
894
e = document.createElement("property")
895
e.setAttribute("name", name)
896
e.setAttribute("type", prop._dbus_signature)
897
e.setAttribute("access", prop._dbus_access)
898
return e
899
for if_tag in document.getElementsByTagName("interface"):
900
for tag in (make_tag(document, name, prop)
901
for name, prop
902
in self._get_all_dbus_properties()
903
if prop._dbus_interface
904
== if_tag.getAttribute("name")):
905
if_tag.appendChild(tag)
906
# Add the names to the return values for the
907
# "org.freedesktop.DBus.Properties" methods
908
if (if_tag.getAttribute("name")
909
== "org.freedesktop.DBus.Properties"):
910
for cn in if_tag.getElementsByTagName("method"):
911
if cn.getAttribute("name") == "Get":
912
for arg in cn.getElementsByTagName("arg"):
913
if (arg.getAttribute("direction")
914
== "out"):
915
arg.setAttribute("name", "value")
916
elif cn.getAttribute("name") == "GetAll":
917
for arg in cn.getElementsByTagName("arg"):
918
if (arg.getAttribute("direction")
919
== "out"):
920
arg.setAttribute("name", "props")
921
xmlstring = document.toxml("utf-8")
922
document.unlink()
923
except (AttributeError, xml.dom.DOMException,
924
xml.parsers.expat.ExpatError) as error:
925
logger.error("Failed to override Introspection method",
926
error)
927
return xmlstring
928
929
930
def datetime_to_dbus (dt, variant_level=0):
931
"""Convert a UTC datetime.datetime() to a D-Bus type."""
932
if dt is None:
933
return dbus.String("", variant_level = variant_level)
934
return dbus.String(dt.isoformat(),
935
variant_level=variant_level)
936
937
938
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
939
.__metaclass__):
940
"""Applied to an empty subclass of a D-Bus object, this metaclass
941
will add additional D-Bus attributes matching a certain pattern.
942
"""
943
def __new__(mcs, name, bases, attr):
944
# Go through all the base classes which could have D-Bus
945
# methods, signals, or properties in them
946
for base in (b for b in bases
947
if issubclass(b, dbus.service.Object)):
948
# Go though all attributes of the base class
949
for attrname, attribute in inspect.getmembers(base):
950
# Ignore non-D-Bus attributes, and D-Bus attributes
951
# with the wrong interface name
952
if (not hasattr(attribute, "_dbus_interface")
953
or not attribute._dbus_interface
954
.startswith("se.recompile.Mandos")):
955
continue
956
# Create an alternate D-Bus interface name based on
957
# the current name
958
alt_interface = (attribute._dbus_interface
959
.replace("se.recompile.Mandos",
960
"se.bsnet.fukt.Mandos"))
961
# Is this a D-Bus signal?
962
if getattr(attribute, "_dbus_is_signal", False):
963
# Extract the original non-method function by
964
# black magic
965
nonmethod_func = (dict(
966
zip(attribute.func_code.co_freevars,
967
attribute.__closure__))["func"]
968
.cell_contents)
969
# Create a new, but exactly alike, function
970
# object, and decorate it to be a new D-Bus signal
971
# with the alternate D-Bus interface name
972
new_function = (dbus.service.signal
973
(alt_interface,
974
attribute._dbus_signature)
975
(types.FunctionType(
976
nonmethod_func.func_code,
977
nonmethod_func.func_globals,
978
nonmethod_func.func_name,
979
nonmethod_func.func_defaults,
980
nonmethod_func.func_closure)))
981
# Define a creator of a function to call both the
982
# old and new functions, so both the old and new
983
# signals gets sent when the function is called
984
def fixscope(func1, func2):
985
"""This function is a scope container to pass
986
func1 and func2 to the "call_both" function
987
outside of its arguments"""
988
def call_both(*args, **kwargs):
989
"""This function will emit two D-Bus
990
signals by calling func1 and func2"""
991
func1(*args, **kwargs)
992
func2(*args, **kwargs)
993
return call_both
994
# Create the "call_both" function and add it to
995
# the class
996
attr[attrname] = fixscope(attribute,
997
new_function)
998
# Is this a D-Bus method?
999
elif getattr(attribute, "_dbus_is_method", False):
1000
# Create a new, but exactly alike, function
1001
# object. Decorate it to be a new D-Bus method
1002
# with the alternate D-Bus interface name. Add it
1003
# to the class.
1004
attr[attrname] = (dbus.service.method
1005
(alt_interface,
1006
attribute._dbus_in_signature,
1007
attribute._dbus_out_signature)
1008
(types.FunctionType
1009
(attribute.func_code,
1010
attribute.func_globals,
1011
attribute.func_name,
1012
attribute.func_defaults,
1013
attribute.func_closure)))
1014
# Is this a D-Bus property?
1015
elif getattr(attribute, "_dbus_is_property", False):
1016
# Create a new, but exactly alike, function
1017
# object, and decorate it to be a new D-Bus
1018
# property with the alternate D-Bus interface
1019
# name. Add it to the class.
1020
attr[attrname] = (dbus_service_property
1021
(alt_interface,
1022
attribute._dbus_signature,
1023
attribute._dbus_access,
1024
attribute
1025
._dbus_get_args_options
1026
["byte_arrays"])
1027
(types.FunctionType
1028
(attribute.func_code,
1029
attribute.func_globals,
1030
attribute.func_name,
1031
attribute.func_defaults,
1032
attribute.func_closure)))
1033
return type.__new__(mcs, name, bases, attr)
1034
1035
1036
class ClientDBus(Client, DBusObjectWithProperties):
1037
"""A Client class using D-Bus
1038
1039
Attributes:
1040
dbus_object_path: dbus.ObjectPath
1041
bus: dbus.SystemBus()
1042
"""
1043
1044
runtime_expansions = (Client.runtime_expansions
1045
+ ("dbus_object_path",))
1046
1047
# dbus.service.Object doesn't use super(), so we can't either.
1048
1049
def __init__(self, bus = None, *args, **kwargs):
1050
self.bus = bus
1051
Client.__init__(self, *args, **kwargs)
1052
self._approvals_pending = 0
1053
1054
self._approvals_pending = 0
1055
# Only now, when this client is initialized, can it show up on
1056
# the D-Bus
1057
client_object_name = unicode(self.name).translate(
1058
{ord("."): ord("_"),
1059
ord("-"): ord("_")})
1060
self.dbus_object_path = (dbus.ObjectPath
1061
("/clients/" + client_object_name))
1062
DBusObjectWithProperties.__init__(self, self.bus,
1063
self.dbus_object_path)
1064
1065
def notifychangeproperty(transform_func,
1066
dbus_name, type_func=lambda x: x,
1067
variant_level=1):
1068
""" Modify a variable so that it's a property which announces
1069
its changes to DBus.
1070
1071
transform_fun: Function that takes a value and a variant_level
1072
and transforms it to a D-Bus type.
1073
dbus_name: D-Bus name of the variable
1074
type_func: Function that transform the value before sending it
1075
to the D-Bus. Default: no transform
1076
variant_level: D-Bus variant level. Default: 1
1077
"""
1078
attrname = "_{0}".format(dbus_name)
1079
def setter(self, value):
1080
if hasattr(self, "dbus_object_path"):
1081
if (not hasattr(self, attrname) or
1082
type_func(getattr(self, attrname, None))
1083
!= type_func(value)):
1084
dbus_value = transform_func(type_func(value),
1085
variant_level
1086
=variant_level)
1087
self.PropertyChanged(dbus.String(dbus_name),
1088
dbus_value)
1089
setattr(self, attrname, value)
1090
1091
return property(lambda self: getattr(self, attrname), setter)
1092
1093
1094
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1095
approvals_pending = notifychangeproperty(dbus.Boolean,
1096
"ApprovalPending",
1097
type_func = bool)
1098
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1099
last_enabled = notifychangeproperty(datetime_to_dbus,
1100
"LastEnabled")
1101
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1102
type_func = lambda checker:
1103
checker is not None)
1104
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1105
"LastCheckedOK")
1106
last_approval_request = notifychangeproperty(
1107
datetime_to_dbus, "LastApprovalRequest")
1108
approved_by_default = notifychangeproperty(dbus.Boolean,
1109
"ApprovedByDefault")
1110
approval_delay = notifychangeproperty(dbus.UInt64,
1111
"ApprovalDelay",
1112
type_func =
1113
timedelta_to_milliseconds)
1114
approval_duration = notifychangeproperty(
1115
dbus.UInt64, "ApprovalDuration",
1116
type_func = timedelta_to_milliseconds)
1117
host = notifychangeproperty(dbus.String, "Host")
1118
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1119
type_func =
1120
timedelta_to_milliseconds)
1121
extended_timeout = notifychangeproperty(
1122
dbus.UInt64, "ExtendedTimeout",
1123
type_func = timedelta_to_milliseconds)
1124
interval = notifychangeproperty(dbus.UInt64,
1125
"Interval",
1126
type_func =
1127
timedelta_to_milliseconds)
1128
checker_command = notifychangeproperty(dbus.String, "Checker")
1129
1130
del notifychangeproperty
1131
1132
def __del__(self, *args, **kwargs):
1133
try:
1134
self.remove_from_connection()
1135
except LookupError:
1136
pass
1137
if hasattr(DBusObjectWithProperties, "__del__"):
1138
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1139
Client.__del__(self, *args, **kwargs)
1140
1141
def checker_callback(self, pid, condition, command,
1142
*args, **kwargs):
1143
self.checker_callback_tag = None
1144
self.checker = None
1145
if os.WIFEXITED(condition):
1146
exitstatus = os.WEXITSTATUS(condition)
1147
# Emit D-Bus signal
1148
self.CheckerCompleted(dbus.Int16(exitstatus),
1149
dbus.Int64(condition),
1150
dbus.String(command))
1151
else:
1152
# Emit D-Bus signal
1153
self.CheckerCompleted(dbus.Int16(-1),
1154
dbus.Int64(condition),
1155
dbus.String(command))
1156
1157
return Client.checker_callback(self, pid, condition, command,
1158
*args, **kwargs)
1159
1160
def start_checker(self, *args, **kwargs):
1161
old_checker = self.checker
1162
if self.checker is not None:
1163
old_checker_pid = self.checker.pid
1164
else:
1165
old_checker_pid = None
1166
r = Client.start_checker(self, *args, **kwargs)
1167
# Only if new checker process was started
1168
if (self.checker is not None
1169
and old_checker_pid != self.checker.pid):
1170
# Emit D-Bus signal
1171
self.CheckerStarted(self.current_checker_command)
1172
return r
1173
1174
def _reset_approved(self):
1175
self.approved = None
1176
return False
1177
1178
def approve(self, value=True):
1179
self.send_changedstate()
1180
self.approved = value
1181
gobject.timeout_add(timedelta_to_milliseconds
1182
(self.approval_duration),
1183
self._reset_approved)
1184
1185
1186
## D-Bus methods, signals & properties
1187
_interface = "se.recompile.Mandos.Client"
1188
1189
## Signals
456
1190
457
1191
# CheckerCompleted - signal
458
@dbus.service.signal(_interface, signature="bqs")
459
def CheckerCompleted(self, success, condition, command):
1192
@dbus.service.signal(_interface, signature="nxs")
1193
def CheckerCompleted(self, exitcode, waitstatus, command):
460
1194
"D-Bus signal"
461
1195
pass
462
1196
466
1200
"D-Bus signal"
467
1201
pass
468
1202
469
# GetAllProperties - method
470
@dbus.service.method(_interface, out_signature="a{sv}")
471
def GetAllProperties(self):
472
"D-Bus method"
473
return dbus.Dictionary({
474
dbus.String("name"):
475
dbus.String(self.name, variant_level=1),
476
dbus.String("fingerprint"):
477
dbus.String(self.fingerprint, variant_level=1),
478
dbus.String("host"):
479
dbus.String(self.host, variant_level=1),
480
dbus.String("created"):
481
_datetime_to_dbus(self.created, variant_level=1),
482
dbus.String("last_enabled"):
483
(_datetime_to_dbus(self.last_enabled,
484
variant_level=1)
485
if self.last_enabled is not None
486
else dbus.Boolean(False, variant_level=1)),
487
dbus.String("enabled"):
488
dbus.Boolean(self.enabled, variant_level=1),
489
dbus.String("last_checked_ok"):
490
(_datetime_to_dbus(self.last_checked_ok,
491
variant_level=1)
492
if self.last_checked_ok is not None
493
else dbus.Boolean (False, variant_level=1)),
494
dbus.String("timeout"):
495
dbus.UInt64(self.timeout_milliseconds(),
496
variant_level=1),
497
dbus.String("interval"):
498
dbus.UInt64(self.interval_milliseconds(),
499
variant_level=1),
500
dbus.String("checker"):
501
dbus.String(self.checker_command,
502
variant_level=1),
503
dbus.String("checker_running"):
504
dbus.Boolean(self.checker is not None,
505
variant_level=1),
506
}, signature="sv")
507
508
# IsStillValid - method
509
IsStillValid = (dbus.service.method(_interface, out_signature="b")
510
(still_valid))
511
IsStillValid.__name__ = "IsStillValid"
512
513
1203
# PropertyChanged - signal
514
1204
@dbus.service.signal(_interface, signature="sv")
515
1205
def PropertyChanged(self, property, value):
516
1206
"D-Bus signal"
517
1207
pass
518
1208
519
# SetChecker - method
520
@dbus.service.method(_interface, in_signature="s")
521
def SetChecker(self, checker):
522
"D-Bus setter method"
523
self.checker_command = checker
524
# Emit D-Bus signal
525
self.PropertyChanged(dbus.String(u"checker"),
526
dbus.String(self.checker_command,
527
variant_level=1))
528
529
# SetHost - method
530
@dbus.service.method(_interface, in_signature="s")
531
def SetHost(self, host):
532
"D-Bus setter method"
533
self.host = host
534
# Emit D-Bus signal
535
self.PropertyChanged(dbus.String(u"host"),
536
dbus.String(self.host, variant_level=1))
537
538
# SetInterval - method
539
@dbus.service.method(_interface, in_signature="t")
540
def SetInterval(self, milliseconds):
541
self.interval = datetime.timedelta(0, 0, 0, milliseconds)
542
# Emit D-Bus signal
543
self.PropertyChanged(dbus.String(u"interval"),
544
(dbus.UInt64(self.interval_milliseconds(),
545
variant_level=1)))
546
547
# SetSecret - method
548
@dbus.service.method(_interface, in_signature="ay",
549
byte_arrays=True)
550
def SetSecret(self, secret):
551
"D-Bus setter method"
552
self.secret = str(secret)
553
554
# SetTimeout - method
555
@dbus.service.method(_interface, in_signature="t")
556
def SetTimeout(self, milliseconds):
557
self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
558
# Emit D-Bus signal
559
self.PropertyChanged(dbus.String(u"timeout"),
560
(dbus.UInt64(self.timeout_milliseconds(),
561
variant_level=1)))
1209
# GotSecret - signal
1210
@dbus.service.signal(_interface)
1211
def GotSecret(self):
1212
"""D-Bus signal
1213
Is sent after a successful transfer of secret from the Mandos
1214
server to mandos-client
1215
"""
1216
pass
1217
1218
# Rejected - signal
1219
@dbus.service.signal(_interface, signature="s")
1220
def Rejected(self, reason):
1221
"D-Bus signal"
1222
pass
1223
1224
# NeedApproval - signal
1225
@dbus.service.signal(_interface, signature="tb")
1226
def NeedApproval(self, timeout, default):
1227
"D-Bus signal"
1228
return self.need_approval()
1229
1230
# NeRwequest - signal
1231
@dbus.service.signal(_interface, signature="s")
1232
def NewRequest(self, ip):
1233
"""D-Bus signal
1234
Is sent after a client request a password.
1235
"""
1236
pass
1237
1238
## Methods
1239
1240
# Approve - method
1241
@dbus.service.method(_interface, in_signature="b")
1242
def Approve(self, value):
1243
self.approve(value)
1244
1245
# CheckedOK - method
1246
@dbus.service.method(_interface)
1247
def CheckedOK(self):
1248
self.checked_ok()
562
1249
563
1250
# Enable - method
564
Enable = dbus.service.method(_interface)(enable)
565
Enable.__name__ = "Enable"
1251
@dbus.service.method(_interface)
1252
def Enable(self):
1253
"D-Bus method"
1254
self.enable()
566
1255
567
1256
# StartChecker - method
568
1257
@dbus.service.method(_interface)
577
1266
self.disable()
578
1267
579
1268
# StopChecker - method
580
StopChecker = dbus.service.method(_interface)(stop_checker)
581
StopChecker.__name__ = "StopChecker"
1269
@dbus.service.method(_interface)
1270
def StopChecker(self):
1271
self.stop_checker()
1272
1273
## Properties
1274
1275
# ApprovalPending - property
1276
@dbus_service_property(_interface, signature="b", access="read")
1277
def ApprovalPending_dbus_property(self):
1278
return dbus.Boolean(bool(self.approvals_pending))
1279
1280
# ApprovedByDefault - property
1281
@dbus_service_property(_interface, signature="b",
1282
access="readwrite")
1283
def ApprovedByDefault_dbus_property(self, value=None):
1284
if value is None: # get
1285
return dbus.Boolean(self.approved_by_default)
1286
self.approved_by_default = bool(value)
1287
1288
# ApprovalDelay - property
1289
@dbus_service_property(_interface, signature="t",
1290
access="readwrite")
1291
def ApprovalDelay_dbus_property(self, value=None):
1292
if value is None: # get
1293
return dbus.UInt64(self.approval_delay_milliseconds())
1294
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1295
1296
# ApprovalDuration - property
1297
@dbus_service_property(_interface, signature="t",
1298
access="readwrite")
1299
def ApprovalDuration_dbus_property(self, value=None):
1300
if value is None: # get
1301
return dbus.UInt64(timedelta_to_milliseconds(
1302
self.approval_duration))
1303
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1304
1305
# Name - property
1306
@dbus_service_property(_interface, signature="s", access="read")
1307
def Name_dbus_property(self):
1308
return dbus.String(self.name)
1309
1310
# Fingerprint - property
1311
@dbus_service_property(_interface, signature="s", access="read")
1312
def Fingerprint_dbus_property(self):
1313
return dbus.String(self.fingerprint)
1314
1315
# Host - property
1316
@dbus_service_property(_interface, signature="s",
1317
access="readwrite")
1318
def Host_dbus_property(self, value=None):
1319
if value is None: # get
1320
return dbus.String(self.host)
1321
self.host = unicode(value)
1322
1323
# Created - property
1324
@dbus_service_property(_interface, signature="s", access="read")
1325
def Created_dbus_property(self):
1326
return datetime_to_dbus(self.created)
1327
1328
# LastEnabled - property
1329
@dbus_service_property(_interface, signature="s", access="read")
1330
def LastEnabled_dbus_property(self):
1331
return datetime_to_dbus(self.last_enabled)
1332
1333
# Enabled - property
1334
@dbus_service_property(_interface, signature="b",
1335
access="readwrite")
1336
def Enabled_dbus_property(self, value=None):
1337
if value is None: # get
1338
return dbus.Boolean(self.enabled)
1339
if value:
1340
self.enable()
1341
else:
1342
self.disable()
1343
1344
# LastCheckedOK - property
1345
@dbus_service_property(_interface, signature="s",
1346
access="readwrite")
1347
def LastCheckedOK_dbus_property(self, value=None):
1348
if value is not None:
1349
self.checked_ok()
1350
return
1351
return datetime_to_dbus(self.last_checked_ok)
1352
1353
# Expires - property
1354
@dbus_service_property(_interface, signature="s", access="read")
1355
def Expires_dbus_property(self):
1356
return datetime_to_dbus(self.expires)
1357
1358
# LastApprovalRequest - property
1359
@dbus_service_property(_interface, signature="s", access="read")
1360
def LastApprovalRequest_dbus_property(self):
1361
return datetime_to_dbus(self.last_approval_request)
1362
1363
# Timeout - property
1364
@dbus_service_property(_interface, signature="t",
1365
access="readwrite")
1366
def Timeout_dbus_property(self, value=None):
1367
if value is None: # get
1368
return dbus.UInt64(self.timeout_milliseconds())
1369
self.timeout = datetime.timedelta(0, 0, 0, value)
1370
# Reschedule timeout
1371
if self.enabled:
1372
now = datetime.datetime.utcnow()
1373
time_to_die = timedelta_to_milliseconds(
1374
(self.last_checked_ok + self.timeout) - now)
1375
if time_to_die <= 0:
1376
# The timeout has passed
1377
self.disable()
1378
else:
1379
self.expires = (now +
1380
datetime.timedelta(milliseconds =
1381
time_to_die))
1382
if (getattr(self, "disable_initiator_tag", None)
1383
is None):
1384
return
1385
gobject.source_remove(self.disable_initiator_tag)
1386
self.disable_initiator_tag = (gobject.timeout_add
1387
(time_to_die,
1388
self.disable))
1389
1390
# ExtendedTimeout - property
1391
@dbus_service_property(_interface, signature="t",
1392
access="readwrite")
1393
def ExtendedTimeout_dbus_property(self, value=None):
1394
if value is None: # get
1395
return dbus.UInt64(self.extended_timeout_milliseconds())
1396
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1397
1398
# Interval - property
1399
@dbus_service_property(_interface, signature="t",
1400
access="readwrite")
1401
def Interval_dbus_property(self, value=None):
1402
if value is None: # get
1403
return dbus.UInt64(self.interval_milliseconds())
1404
self.interval = datetime.timedelta(0, 0, 0, value)
1405
if getattr(self, "checker_initiator_tag", None) is None:
1406
return
1407
if self.enabled:
1408
# Reschedule checker run
1409
gobject.source_remove(self.checker_initiator_tag)
1410
self.checker_initiator_tag = (gobject.timeout_add
1411
(value, self.start_checker))
1412
self.start_checker() # Start one now, too
1413
1414
# Checker - property
1415
@dbus_service_property(_interface, signature="s",
1416
access="readwrite")
1417
def Checker_dbus_property(self, value=None):
1418
if value is None: # get
1419
return dbus.String(self.checker_command)
1420
self.checker_command = unicode(value)
1421
1422
# CheckerRunning - property
1423
@dbus_service_property(_interface, signature="b",
1424
access="readwrite")
1425
def CheckerRunning_dbus_property(self, value=None):
1426
if value is None: # get
1427
return dbus.Boolean(self.checker is not None)
1428
if value:
1429
self.start_checker()
1430
else:
1431
self.stop_checker()
1432
1433
# ObjectPath - property
1434
@dbus_service_property(_interface, signature="o", access="read")
1435
def ObjectPath_dbus_property(self):
1436
return self.dbus_object_path # is already a dbus.ObjectPath
1437
1438
# Secret = property
1439
@dbus_service_property(_interface, signature="ay",
1440
access="write", byte_arrays=True)
1441
def Secret_dbus_property(self, value):
1442
self.secret = str(value)
582
1443
583
1444
del _interface
584
1445
585
1446
586
def peer_certificate(session):
587
"Return the peer's OpenPGP certificate as a bytestring"
588
# If not an OpenPGP certificate...
589
if (gnutls.library.functions
590
.gnutls_certificate_type_get(session._c_object)
591
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
592
# ...do the normal thing
593
return session.peer_certificate
594
list_size = ctypes.c_uint()
595
cert_list = (gnutls.library.functions
596
.gnutls_certificate_get_peers
597
(session._c_object, ctypes.byref(list_size)))
598
if list_size.value == 0:
599
return None
600
cert = cert_list[0]
601
return ctypes.string_at(cert.data, cert.size)
602
603
604
def fingerprint(openpgp):
605
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
606
# New GnuTLS "datum" with the OpenPGP public key
607
datum = (gnutls.library.types
608
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
609
ctypes.POINTER
610
(ctypes.c_ubyte)),
611
ctypes.c_uint(len(openpgp))))
612
# New empty GnuTLS certificate
613
crt = gnutls.library.types.gnutls_openpgp_crt_t()
614
(gnutls.library.functions
615
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
616
# Import the OpenPGP public key into the certificate
617
(gnutls.library.functions
618
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
619
gnutls.library.constants
620
.GNUTLS_OPENPGP_FMT_RAW))
621
# Verify the self signature in the key
622
crtverify = ctypes.c_uint()
623
(gnutls.library.functions
624
.gnutls_openpgp_crt_verify_self(crt, 0, ctypes.byref(crtverify)))
625
if crtverify.value != 0:
626
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
627
raise gnutls.errors.CertificateSecurityError("Verify failed")
628
# New buffer for the fingerprint
629
buf = ctypes.create_string_buffer(20)
630
buf_len = ctypes.c_size_t()
631
# Get the fingerprint from the certificate into the buffer
632
(gnutls.library.functions
633
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
634
ctypes.byref(buf_len)))
635
# Deinit the certificate
636
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
637
# Convert the buffer to a Python bytestring
638
fpr = ctypes.string_at(buf, buf_len.value)
639
# Convert the bytestring to hexadecimal notation
640
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
641
return hex_fpr
642
643
644
class TCP_handler(SocketServer.BaseRequestHandler, object):
645
"""A TCP request handler class.
646
Instantiated by IPv6_TCPServer for each request to handle it.
1447
class ProxyClient(object):
1448
def __init__(self, child_pipe, fpr, address):
1449
self._pipe = child_pipe
1450
self._pipe.send(('init', fpr, address))
1451
if not self._pipe.recv():
1452
raise KeyError()
1453
1454
def __getattribute__(self, name):
1455
if name == '_pipe':
1456
return super(ProxyClient, self).__getattribute__(name)
1457
self._pipe.send(('getattr', name))
1458
data = self._pipe.recv()
1459
if data[0] == 'data':
1460
return data[1]
1461
if data[0] == 'function':
1462
def func(*args, **kwargs):
1463
self._pipe.send(('funcall', name, args, kwargs))
1464
return self._pipe.recv()[1]
1465
return func
1466
1467
def __setattr__(self, name, value):
1468
if name == '_pipe':
1469
return super(ProxyClient, self).__setattr__(name, value)
1470
self._pipe.send(('setattr', name, value))
1471
1472
1473
class ClientDBusTransitional(ClientDBus):
1474
__metaclass__ = AlternateDBusNamesMetaclass
1475
1476
1477
class ClientHandler(socketserver.BaseRequestHandler, object):
1478
"""A class to handle client connections.
1479
1480
Instantiated once for each connection to handle it.
647
1481
Note: This will run in its own forked process."""
648
1482
649
1483
def handle(self):
650
logger.info(u"TCP connection from: %s",
651
unicode(self.client_address))
652
session = (gnutls.connection
653
.ClientSession(self.request,
654
gnutls.connection
655
.X509Credentials()))
656
657
line = self.request.makefile().readline()
658
logger.debug(u"Protocol version: %r", line)
659
try:
660
if int(line.strip().split()[0]) > 1:
661
raise RuntimeError
662
except (ValueError, IndexError, RuntimeError), error:
663
logger.error(u"Unknown protocol version: %s", error)
664
return
665
666
# Note: gnutls.connection.X509Credentials is really a generic
667
# GnuTLS certificate credentials object so long as no X.509
668
# keys are added to it. Therefore, we can use it here despite
669
# using OpenPGP certificates.
670
671
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
672
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
673
# "+DHE-DSS"))
674
# Use a fallback default, since this MUST be set.
675
priority = self.server.settings.get("priority", "NORMAL")
676
(gnutls.library.functions
677
.gnutls_priority_set_direct(session._c_object,
678
priority, None))
679
680
try:
681
session.handshake()
682
except gnutls.errors.GNUTLSError, error:
683
logger.warning(u"Handshake failed: %s", error)
684
# Do not run session.bye() here: the session is not
685
# established. Just abandon the request.
686
return
687
try:
688
fpr = fingerprint(peer_certificate(session))
689
except (TypeError, gnutls.errors.GNUTLSError), error:
690
logger.warning(u"Bad certificate: %s", error)
691
session.bye()
692
return
693
logger.debug(u"Fingerprint: %s", fpr)
694
for c in self.server.clients:
695
if c.fingerprint == fpr:
696
client = c
697
break
698
else:
699
logger.warning(u"Client not found for fingerprint: %s",
700
fpr)
701
session.bye()
702
return
703
# Have to check if client.still_valid(), since it is possible
704
# that the client timed out while establishing the GnuTLS
705
# session.
706
if not client.still_valid():
707
logger.warning(u"Client %(name)s is invalid",
708
vars(client))
709
session.bye()
710
return
711
## This won't work here, since we're in a fork.
712
# client.bump_timeout()
713
sent_size = 0
714
while sent_size < len(client.secret):
715
sent = session.send(client.secret[sent_size:])
716
logger.debug(u"Sent: %d, remaining: %d",
717
sent, len(client.secret)
718
- (sent_size + sent))
719
sent_size += sent
720
session.bye()
721
722
723
class IPv6_TCPServer(SocketServer.ForkingMixIn,
724
SocketServer.TCPServer, object):
725
"""IPv6 TCP server. Accepts 'None' as address and/or port.
1484
with contextlib.closing(self.server.child_pipe) as child_pipe:
1485
logger.info("TCP connection from: %s",
1486
unicode(self.client_address))
1487
logger.debug("Pipe FD: %d",
1488
self.server.child_pipe.fileno())
1489
1490
session = (gnutls.connection
1491
.ClientSession(self.request,
1492
gnutls.connection
1493
.X509Credentials()))
1494
1495
# Note: gnutls.connection.X509Credentials is really a
1496
# generic GnuTLS certificate credentials object so long as
1497
# no X.509 keys are added to it. Therefore, we can use it
1498
# here despite using OpenPGP certificates.
1499
1500
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1501
# "+AES-256-CBC", "+SHA1",
1502
# "+COMP-NULL", "+CTYPE-OPENPGP",
1503
# "+DHE-DSS"))
1504
# Use a fallback default, since this MUST be set.
1505
priority = self.server.gnutls_priority
1506
if priority is None:
1507
priority = "NORMAL"
1508
(gnutls.library.functions
1509
.gnutls_priority_set_direct(session._c_object,
1510
priority, None))
1511
1512
# Start communication using the Mandos protocol
1513
# Get protocol number
1514
line = self.request.makefile().readline()
1515
logger.debug("Protocol version: %r", line)
1516
try:
1517
if int(line.strip().split()[0]) > 1:
1518
raise RuntimeError
1519
except (ValueError, IndexError, RuntimeError) as error:
1520
logger.error("Unknown protocol version: %s", error)
1521
return
1522
1523
# Start GnuTLS connection
1524
try:
1525
session.handshake()
1526
except gnutls.errors.GNUTLSError as error:
1527
logger.warning("Handshake failed: %s", error)
1528
# Do not run session.bye() here: the session is not
1529
# established. Just abandon the request.
1530
return
1531
logger.debug("Handshake succeeded")
1532
1533
approval_required = False
1534
try:
1535
try:
1536
fpr = self.fingerprint(self.peer_certificate
1537
(session))
1538
except (TypeError,
1539
gnutls.errors.GNUTLSError) as error:
1540
logger.warning("Bad certificate: %s", error)
1541
return
1542
logger.debug("Fingerprint: %s", fpr)
1543
1544
try:
1545
client = ProxyClient(child_pipe, fpr,
1546
self.client_address)
1547
except KeyError:
1548
return
1549
1550
if self.server.use_dbus:
1551
# Emit D-Bus signal
1552
client.NewRequest(str(self.client_address))
1553
1554
if client.approval_delay:
1555
delay = client.approval_delay
1556
client.approvals_pending += 1
1557
approval_required = True
1558
1559
while True:
1560
if not client.enabled:
1561
logger.info("Client %s is disabled",
1562
client.name)
1563
if self.server.use_dbus:
1564
# Emit D-Bus signal
1565
client.Rejected("Disabled")
1566
return
1567
1568
if client.approved or not client.approval_delay:
1569
#We are approved or approval is disabled
1570
break
1571
elif client.approved is None:
1572
logger.info("Client %s needs approval",
1573
client.name)
1574
if self.server.use_dbus:
1575
# Emit D-Bus signal
1576
client.NeedApproval(
1577
client.approval_delay_milliseconds(),
1578
client.approved_by_default)
1579
else:
1580
logger.warning("Client %s was not approved",
1581
client.name)
1582
if self.server.use_dbus:
1583
# Emit D-Bus signal
1584
client.Rejected("Denied")
1585
return
1586
1587
#wait until timeout or approved
1588
time = datetime.datetime.now()
1589
client.changedstate.acquire()
1590
(client.changedstate.wait
1591
(float(client.timedelta_to_milliseconds(delay)
1592
/ 1000)))
1593
client.changedstate.release()
1594
time2 = datetime.datetime.now()
1595
if (time2 - time) >= delay:
1596
if not client.approved_by_default:
1597
logger.warning("Client %s timed out while"
1598
" waiting for approval",
1599
client.name)
1600
if self.server.use_dbus:
1601
# Emit D-Bus signal
1602
client.Rejected("Approval timed out")
1603
return
1604
else:
1605
break
1606
else:
1607
delay -= time2 - time
1608
1609
sent_size = 0
1610
while sent_size < len(client.secret):
1611
try:
1612
sent = session.send(client.secret[sent_size:])
1613
except gnutls.errors.GNUTLSError as error:
1614
logger.warning("gnutls send failed")
1615
return
1616
logger.debug("Sent: %d, remaining: %d",
1617
sent, len(client.secret)
1618
- (sent_size + sent))
1619
sent_size += sent
1620
1621
logger.info("Sending secret to %s", client.name)
1622
# bump the timeout using extended_timeout
1623
client.checked_ok(client.extended_timeout)
1624
if self.server.use_dbus:
1625
# Emit D-Bus signal
1626
client.GotSecret()
1627
1628
finally:
1629
if approval_required:
1630
client.approvals_pending -= 1
1631
try:
1632
session.bye()
1633
except gnutls.errors.GNUTLSError as error:
1634
logger.warning("GnuTLS bye failed")
1635
1636
@staticmethod
1637
def peer_certificate(session):
1638
"Return the peer's OpenPGP certificate as a bytestring"
1639
# If not an OpenPGP certificate...
1640
if (gnutls.library.functions
1641
.gnutls_certificate_type_get(session._c_object)
1642
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1643
# ...do the normal thing
1644
return session.peer_certificate
1645
list_size = ctypes.c_uint(1)
1646
cert_list = (gnutls.library.functions
1647
.gnutls_certificate_get_peers
1648
(session._c_object, ctypes.byref(list_size)))
1649
if not bool(cert_list) and list_size.value != 0:
1650
raise gnutls.errors.GNUTLSError("error getting peer"
1651
" certificate")
1652
if list_size.value == 0:
1653
return None
1654
cert = cert_list[0]
1655
return ctypes.string_at(cert.data, cert.size)
1656
1657
@staticmethod
1658
def fingerprint(openpgp):
1659
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1660
# New GnuTLS "datum" with the OpenPGP public key
1661
datum = (gnutls.library.types
1662
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1663
ctypes.POINTER
1664
(ctypes.c_ubyte)),
1665
ctypes.c_uint(len(openpgp))))
1666
# New empty GnuTLS certificate
1667
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1668
(gnutls.library.functions
1669
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1670
# Import the OpenPGP public key into the certificate
1671
(gnutls.library.functions
1672
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1673
gnutls.library.constants
1674
.GNUTLS_OPENPGP_FMT_RAW))
1675
# Verify the self signature in the key
1676
crtverify = ctypes.c_uint()
1677
(gnutls.library.functions
1678
.gnutls_openpgp_crt_verify_self(crt, 0,
1679
ctypes.byref(crtverify)))
1680
if crtverify.value != 0:
1681
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1682
raise (gnutls.errors.CertificateSecurityError
1683
("Verify failed"))
1684
# New buffer for the fingerprint
1685
buf = ctypes.create_string_buffer(20)
1686
buf_len = ctypes.c_size_t()
1687
# Get the fingerprint from the certificate into the buffer
1688
(gnutls.library.functions
1689
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1690
ctypes.byref(buf_len)))
1691
# Deinit the certificate
1692
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1693
# Convert the buffer to a Python bytestring
1694
fpr = ctypes.string_at(buf, buf_len.value)
1695
# Convert the bytestring to hexadecimal notation
1696
hex_fpr = binascii.hexlify(fpr).upper()
1697
return hex_fpr
1698
1699
1700
class MultiprocessingMixIn(object):
1701
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1702
def sub_process_main(self, request, address):
1703
try:
1704
self.finish_request(request, address)
1705
except Exception:
1706
self.handle_error(request, address)
1707
self.close_request(request)
1708
1709
def process_request(self, request, address):
1710
"""Start a new process to process the request."""
1711
proc = multiprocessing.Process(target = self.sub_process_main,
1712
args = (request,
1713
address))
1714
proc.start()
1715
return proc
1716
1717
1718
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1719
""" adds a pipe to the MixIn """
1720
def process_request(self, request, client_address):
1721
"""Overrides and wraps the original process_request().
1722
1723
This function creates a new pipe in self.pipe
1724
"""
1725
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1726
1727
proc = MultiprocessingMixIn.process_request(self, request,
1728
client_address)
1729
self.child_pipe.close()
1730
self.add_pipe(parent_pipe, proc)
1731
1732
def add_pipe(self, parent_pipe, proc):
1733
"""Dummy function; override as necessary"""
1734
raise NotImplementedError
1735
1736
1737
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1738
socketserver.TCPServer, object):
1739
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1740
726
1741
Attributes:
727
settings: Server settings
728
clients: Set() of Client objects
729
1742
enabled: Boolean; whether this server is activated yet
1743
interface: None or a network interface name (string)
1744
use_ipv6: Boolean; to use IPv6 or not
730
1745
"""
731
address_family = socket.AF_INET6
732
def __init__(self, *args, **kwargs):
733
if "settings" in kwargs:
734
self.settings = kwargs["settings"]
735
del kwargs["settings"]
736
if "clients" in kwargs:
737
self.clients = kwargs["clients"]
738
del kwargs["clients"]
739
self.enabled = False
740
super(IPv6_TCPServer, self).__init__(*args, **kwargs)
1746
def __init__(self, server_address, RequestHandlerClass,
1747
interface=None, use_ipv6=True):
1748
self.interface = interface
1749
if use_ipv6:
1750
self.address_family = socket.AF_INET6
1751
socketserver.TCPServer.__init__(self, server_address,
1752
RequestHandlerClass)
741
1753
def server_bind(self):
742
1754
"""This overrides the normal server_bind() function
743
1755
to bind to an interface if one was specified, and also NOT to
744
1756
bind to an address or port if they were not specified."""
745
if self.settings["interface"]:
746
# 25 is from /usr/include/asm-i486/socket.h
747
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
748
try:
749
self.socket.setsockopt(socket.SOL_SOCKET,
750
SO_BINDTODEVICE,
751
self.settings["interface"])
752
except socket.error, error:
753
if error[0] == errno.EPERM:
754
logger.error(u"No permission to"
755
u" bind to interface %s",
756
self.settings["interface"])
757
else:
758
raise error
1757
if self.interface is not None:
1758
if SO_BINDTODEVICE is None:
1759
logger.error("SO_BINDTODEVICE does not exist;"
1760
" cannot bind to interface %s",
1761
self.interface)
1762
else:
1763
try:
1764
self.socket.setsockopt(socket.SOL_SOCKET,
1765
SO_BINDTODEVICE,
1766
str(self.interface
1767
+ '\0'))
1768
except socket.error as error:
1769
if error[0] == errno.EPERM:
1770
logger.error("No permission to"
1771
" bind to interface %s",
1772
self.interface)
1773
elif error[0] == errno.ENOPROTOOPT:
1774
logger.error("SO_BINDTODEVICE not available;"
1775
" cannot bind to interface %s",
1776
self.interface)
1777
else:
1778
raise
759
1779
# Only bind(2) the socket if we really need to.
760
1780
if self.server_address[0] or self.server_address[1]:
761
1781
if not self.server_address[0]:
762
in6addr_any = "::"
763
self.server_address = (in6addr_any,
1782
if self.address_family == socket.AF_INET6:
1783
any_address = "::" # in6addr_any
1784
else:
1785
any_address = socket.INADDR_ANY
1786
self.server_address = (any_address,
764
1787
self.server_address[1])
765
1788
elif not self.server_address[1]:
766
1789
self.server_address = (self.server_address[0],
767
1790
0)
768
# if self.settings["interface"]:
1791
# if self.interface:
769
1792
# self.server_address = (self.server_address[0],
770
1793
# 0, # port
771
1794
# 0, # flowinfo
772
1795
# if_nametoindex
773
# (self.settings
774
# ["interface"]))
775
return super(IPv6_TCPServer, self).server_bind()
1796
# (self.interface))
1797
return socketserver.TCPServer.server_bind(self)
1798
1799
1800
class MandosServer(IPv6_TCPServer):
1801
"""Mandos server.
1802
1803
Attributes:
1804
clients: set of Client objects
1805
gnutls_priority GnuTLS priority string
1806
use_dbus: Boolean; to emit D-Bus signals or not
1807
1808
Assumes a gobject.MainLoop event loop.
1809
"""
1810
def __init__(self, server_address, RequestHandlerClass,
1811
interface=None, use_ipv6=True, clients=None,
1812
gnutls_priority=None, use_dbus=True):
1813
self.enabled = False
1814
self.clients = clients
1815
if self.clients is None:
1816
self.clients = {}
1817
self.use_dbus = use_dbus
1818
self.gnutls_priority = gnutls_priority
1819
IPv6_TCPServer.__init__(self, server_address,
1820
RequestHandlerClass,
1821
interface = interface,
1822
use_ipv6 = use_ipv6)
776
1823
def server_activate(self):
777
1824
if self.enabled:
778
return super(IPv6_TCPServer, self).server_activate()
1825
return socketserver.TCPServer.server_activate(self)
1826
779
1827
def enable(self):
780
1828
self.enabled = True
1829
1830
def add_pipe(self, parent_pipe, proc):
1831
# Call "handle_ipc" for both data and EOF events
1832
gobject.io_add_watch(parent_pipe.fileno(),
1833
gobject.IO_IN | gobject.IO_HUP,
1834
functools.partial(self.handle_ipc,
1835
parent_pipe =
1836
parent_pipe,
1837
proc = proc))
1838
1839
def handle_ipc(self, source, condition, parent_pipe=None,
1840
proc = None, client_object=None):
1841
condition_names = {
1842
gobject.IO_IN: "IN", # There is data to read.
1843
gobject.IO_OUT: "OUT", # Data can be written (without
1844
# blocking).
1845
gobject.IO_PRI: "PRI", # There is urgent data to read.
1846
gobject.IO_ERR: "ERR", # Error condition.
1847
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1848
# broken, usually for pipes and
1849
# sockets).
1850
}
1851
conditions_string = ' | '.join(name
1852
for cond, name in
1853
condition_names.iteritems()
1854
if cond & condition)
1855
# error, or the other end of multiprocessing.Pipe has closed
1856
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
1857
# Wait for other process to exit
1858
proc.join()
1859
return False
1860
1861
# Read a request from the child
1862
request = parent_pipe.recv()
1863
command = request[0]
1864
1865
if command == 'init':
1866
fpr = request[1]
1867
address = request[2]
1868
1869
for c in self.clients.itervalues():
1870
if c.fingerprint == fpr:
1871
client = c
1872
break
1873
else:
1874
logger.info("Client not found for fingerprint: %s, ad"
1875
"dress: %s", fpr, address)
1876
if self.use_dbus:
1877
# Emit D-Bus signal
1878
mandos_dbus_service.ClientNotFound(fpr,
1879
address[0])
1880
parent_pipe.send(False)
1881
return False
1882
1883
gobject.io_add_watch(parent_pipe.fileno(),
1884
gobject.IO_IN | gobject.IO_HUP,
1885
functools.partial(self.handle_ipc,
1886
parent_pipe =
1887
parent_pipe,
1888
proc = proc,
1889
client_object =
1890
client))
1891
parent_pipe.send(True)
1892
# remove the old hook in favor of the new above hook on
1893
# same fileno
1894
return False
1895
if command == 'funcall':
1896
funcname = request[1]
1897
args = request[2]
1898
kwargs = request[3]
1899
1900
parent_pipe.send(('data', getattr(client_object,
1901
funcname)(*args,
1902
**kwargs)))
1903
1904
if command == 'getattr':
1905
attrname = request[1]
1906
if callable(client_object.__getattribute__(attrname)):
1907
parent_pipe.send(('function',))
1908
else:
1909
parent_pipe.send(('data', client_object
1910
.__getattribute__(attrname)))
1911
1912
if command == 'setattr':
1913
attrname = request[1]
1914
value = request[2]
1915
setattr(client_object, attrname, value)
1916
1917
return True
781
1918
782
1919
783
1920
def string_to_delta(interval):
784
1921
"""Parse a string and return a datetime.timedelta
785
1922
786
1923
>>> string_to_delta('7d')
787
1924
datetime.timedelta(7)
788
1925
>>> string_to_delta('60s')
791
1928
datetime.timedelta(0, 3600)
792
1929
>>> string_to_delta('24h')
793
1930
datetime.timedelta(1)
794
>>> string_to_delta(u'1w')
1931
>>> string_to_delta('1w')
795
1932
datetime.timedelta(7)
796
1933
>>> string_to_delta('5m 30s')
797
1934
datetime.timedelta(0, 330)
801
1938
try:
802
1939
suffix = unicode(s[-1])
803
1940
value = int(s[:-1])
804
if suffix == u"d":
1941
if suffix == "d":
805
1942
delta = datetime.timedelta(value)
806
elif suffix == u"s":
1943
elif suffix == "s":
807
1944
delta = datetime.timedelta(0, value)
808
elif suffix == u"m":
1945
elif suffix == "m":
809
1946
delta = datetime.timedelta(0, 0, 0, 0, value)
810
elif suffix == u"h":
1947
elif suffix == "h":
811
1948
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
812
elif suffix == u"w":
1949
elif suffix == "w":
813
1950
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
814
1951
else:
815
raise ValueError
816
except (ValueError, IndexError):
817
raise ValueError
1952
raise ValueError("Unknown suffix %r" % suffix)
1953
except (ValueError, IndexError) as e:
1954
raise ValueError(*(e.args))
818
1955
timevalue += delta
819
1956
return timevalue
820
1957
821
1958
822
def server_state_changed(state):
823
"""Derived from the Avahi example code"""
824
if state == avahi.SERVER_COLLISION:
825
logger.error(u"Zeroconf server name collision")
826
service.remove()
827
elif state == avahi.SERVER_RUNNING:
828
service.add()
829
830
831
def entry_group_state_changed(state, error):
832
"""Derived from the Avahi example code"""
833
logger.debug(u"Avahi state change: %i", state)
834
835
if state == avahi.ENTRY_GROUP_ESTABLISHED:
836
logger.debug(u"Zeroconf service established.")
837
elif state == avahi.ENTRY_GROUP_COLLISION:
838
logger.warning(u"Zeroconf service name collision.")
839
service.rename()
840
elif state == avahi.ENTRY_GROUP_FAILURE:
841
logger.critical(u"Avahi: Error in group state changed %s",
842
unicode(error))
843
raise AvahiGroupError(u"State changed: %s" % unicode(error))
844
845
def if_nametoindex(interface):
846
"""Call the C function if_nametoindex(), or equivalent"""
847
global if_nametoindex
848
try:
849
if_nametoindex = (ctypes.cdll.LoadLibrary
850
(ctypes.util.find_library("c"))
851
.if_nametoindex)
852
except (OSError, AttributeError):
853
if "struct" not in sys.modules:
854
import struct
855
if "fcntl" not in sys.modules:
856
import fcntl
857
def if_nametoindex(interface):
858
"Get an interface index the hard way, i.e. using fcntl()"
859
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
860
with closing(socket.socket()) as s:
861
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
862
struct.pack("16s16x", interface))
863
interface_index = struct.unpack("I", ifreq[16:20])[0]
864
return interface_index
865
return if_nametoindex(interface)
866
867
868
1959
def daemon(nochdir = False, noclose = False):
869
1960
"""See daemon(3). Standard BSD Unix function.
1961
870
1962
This should really exist as os.daemon, but it doesn't (yet)."""
871
1963
if os.fork():
872
1964
sys.exit()
880
1972
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
881
1973
if not stat.S_ISCHR(os.fstat(null).st_mode):
882
1974
raise OSError(errno.ENODEV,
883
"/dev/null not a character device")
1975
"%s not a character device"
1976
% os.path.devnull)
884
1977
os.dup2(null, sys.stdin.fileno())
885
1978
os.dup2(null, sys.stdout.fileno())
886
1979
os.dup2(null, sys.stderr.fileno())
889
1982
890
1983
891
1984
def main():
892
parser = optparse.OptionParser(version = "%%prog %s" % version)
893
parser.add_option("-i", "--interface", type="string",
894
metavar="IF", help="Bind to interface IF")
895
parser.add_option("-a", "--address", type="string",
896
help="Address to listen for requests on")
897
parser.add_option("-p", "--port", type="int",
898
help="Port number to receive requests on")
899
parser.add_option("--check", action="store_true",
900
help="Run self-test")
901
parser.add_option("--debug", action="store_true",
902
help="Debug mode; run in foreground and log to"
903
" terminal")
904
parser.add_option("--priority", type="string", help="GnuTLS"
905
" priority string (see GnuTLS documentation)")
906
parser.add_option("--servicename", type="string", metavar="NAME",
907
help="Zeroconf service name")
908
parser.add_option("--configdir", type="string",
909
default="/etc/mandos", metavar="DIR",
910
help="Directory to search for configuration"
911
" files")
912
parser.add_option("--no-dbus", action="store_false",
913
dest="use_dbus",
914
help=optparse.SUPPRESS_HELP)
915
options = parser.parse_args()[0]
1985
1986
##################################################################
1987
# Parsing of options, both command line and config file
1988
1989
parser = argparse.ArgumentParser()
1990
parser.add_argument("-v", "--version", action="version",
1991
version = "%%(prog)s %s" % version,
1992
help="show version number and exit")
1993
parser.add_argument("-i", "--interface", metavar="IF",
1994
help="Bind to interface IF")
1995
parser.add_argument("-a", "--address",
1996
help="Address to listen for requests on")
1997
parser.add_argument("-p", "--port", type=int,
1998
help="Port number to receive requests on")
1999
parser.add_argument("--check", action="store_true",
2000
help="Run self-test")
2001
parser.add_argument("--debug", action="store_true",
2002
help="Debug mode; run in foreground and log"
2003
" to terminal")
2004
parser.add_argument("--debuglevel", metavar="LEVEL",
2005
help="Debug level for stdout output")
2006
parser.add_argument("--priority", help="GnuTLS"
2007
" priority string (see GnuTLS documentation)")
2008
parser.add_argument("--servicename",
2009
metavar="NAME", help="Zeroconf service name")
2010
parser.add_argument("--configdir",
2011
default="/etc/mandos", metavar="DIR",
2012
help="Directory to search for configuration"
2013
" files")
2014
parser.add_argument("--no-dbus", action="store_false",
2015
dest="use_dbus", help="Do not provide D-Bus"
2016
" system bus interface")
2017
parser.add_argument("--no-ipv6", action="store_false",
2018
dest="use_ipv6", help="Do not use IPv6")
2019
parser.add_argument("--no-restore", action="store_false",
2020
dest="restore", help="Do not restore stored"
2021
" state")
2022
parser.add_argument("--statedir", metavar="DIR",
2023
help="Directory to save/restore state in")
2024
2025
options = parser.parse_args()
916
2026
917
2027
if options.check:
918
2028
import doctest
928
2038
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
929
2039
"servicename": "Mandos",
930
2040
"use_dbus": "True",
2041
"use_ipv6": "True",
2042
"debuglevel": "",
2043
"restore": "True",
2044
"statedir": "/var/lib/mandos"
931
2045
}
932
2046
933
2047
# Parse config file for server-global settings
934
server_config = ConfigParser.SafeConfigParser(server_defaults)
2048
server_config = configparser.SafeConfigParser(server_defaults)
935
2049
del server_defaults
936
server_config.read(os.path.join(options.configdir, "mandos.conf"))
2050
server_config.read(os.path.join(options.configdir,
2051
"mandos.conf"))
937
2052
# Convert the SafeConfigParser object to a dict
938
2053
server_settings = server_config.defaults()
939
# Use getboolean on the boolean config options
940
server_settings["debug"] = (server_config.getboolean
941
("DEFAULT", "debug"))
942
server_settings["use_dbus"] = (server_config.getboolean
943
("DEFAULT", "use_dbus"))
2054
# Use the appropriate methods on the non-string config options
2055
for option in ("debug", "use_dbus", "use_ipv6"):
2056
server_settings[option] = server_config.getboolean("DEFAULT",
2057
option)
2058
if server_settings["port"]:
2059
server_settings["port"] = server_config.getint("DEFAULT",
2060
"port")
944
2061
del server_config
945
2062
946
2063
# Override the settings from the config file with command line
947
2064
# options, if set.
948
2065
for option in ("interface", "address", "port", "debug",
949
2066
"priority", "servicename", "configdir",
950
"use_dbus"):
2067
"use_dbus", "use_ipv6", "debuglevel", "restore",
2068
"statedir"):
951
2069
value = getattr(options, option)
952
2070
if value is not None:
953
2071
server_settings[option] = value
954
2072
del options
2073
# Force all strings to be unicode
2074
for option in server_settings.keys():
2075
if type(server_settings[option]) is str:
2076
server_settings[option] = unicode(server_settings[option])
955
2077
# Now we have our good server settings in "server_settings"
956
2078
2079
##################################################################
2080
957
2081
# For convenience
958
2082
debug = server_settings["debug"]
2083
debuglevel = server_settings["debuglevel"]
959
2084
use_dbus = server_settings["use_dbus"]
960
use_dbus = False
2085
use_ipv6 = server_settings["use_ipv6"]
2086
stored_state_path = os.path.join(server_settings["statedir"],
2087
stored_state_file)
961
2088
962
if not debug:
963
syslogger.setLevel(logging.WARNING)
964
console.setLevel(logging.WARNING)
2089
if debug:
2090
initlogger(debug, logging.DEBUG)
2091
else:
2092
if not debuglevel:
2093
initlogger(debug)
2094
else:
2095
level = getattr(logging, debuglevel.upper())
2096
initlogger(debug, level)
965
2097
966
2098
if server_settings["servicename"] != "Mandos":
967
2099
syslogger.setFormatter(logging.Formatter
968
('Mandos (%s): %%(levelname)s:'
969
' %%(message)s'
2100
('Mandos (%s) [%%(process)d]:'
2101
' %%(levelname)s: %%(message)s'
970
2102
% server_settings["servicename"]))
971
2103
972
2104
# Parse config file with clients
973
client_defaults = { "timeout": "1h",
974
"interval": "5m",
975
"checker": "fping -q -- %(host)s",
976
"host": "",
977
}
978
client_config = ConfigParser.SafeConfigParser(client_defaults)
2105
client_config = configparser.SafeConfigParser(Client
2106
.client_defaults)
979
2107
client_config.read(os.path.join(server_settings["configdir"],
980
2108
"clients.conf"))
981
2109
982
clients = Set()
983
tcp_server = IPv6_TCPServer((server_settings["address"],
984
server_settings["port"]),
985
TCP_handler,
986
settings=server_settings,
987
clients=clients)
988
pidfilename = "/var/run/mandos.pid"
989
try:
990
pidfile = open(pidfilename, "w")
991
except IOError, error:
992
logger.error("Could not open file %r", pidfilename)
2110
global mandos_dbus_service
2111
mandos_dbus_service = None
2112
2113
tcp_server = MandosServer((server_settings["address"],
2114
server_settings["port"]),
2115
ClientHandler,
2116
interface=(server_settings["interface"]
2117
or None),
2118
use_ipv6=use_ipv6,
2119
gnutls_priority=
2120
server_settings["priority"],
2121
use_dbus=use_dbus)
2122
if not debug:
2123
pidfilename = "/var/run/mandos.pid"
2124
try:
2125
pidfile = open(pidfilename, "w")
2126
except IOError:
2127
logger.error("Could not open file %r", pidfilename)
993
2128
994
2129
try:
995
2130
uid = pwd.getpwnam("_mandos").pw_uid
2131
gid = pwd.getpwnam("_mandos").pw_gid
996
2132
except KeyError:
997
2133
try:
998
2134
uid = pwd.getpwnam("mandos").pw_uid
2135
gid = pwd.getpwnam("mandos").pw_gid
999
2136
except KeyError:
1000
2137
try:
1001
2138
uid = pwd.getpwnam("nobody").pw_uid
2139
gid = pwd.getpwnam("nobody").pw_gid
1002
2140
except KeyError:
1003
2141
uid = 65534
1004
try:
1005
gid = pwd.getpwnam("_mandos").pw_gid
1006
except KeyError:
1007
try:
1008
gid = pwd.getpwnam("mandos").pw_gid
1009
except KeyError:
1010
try:
1011
gid = pwd.getpwnam("nogroup").pw_gid
1012
except KeyError:
1013
2142
gid = 65534
1014
2143
try:
2144
os.setgid(gid)
1015
2145
os.setuid(uid)
1016
os.setgid(gid)
1017
except OSError, error:
2146
except OSError as error:
1018
2147
if error[0] != errno.EPERM:
1019
2148
raise error
1020
2149
1021
global service
1022
service = AvahiService(name = server_settings["servicename"],
1023
servicetype = "_mandos._tcp", )
1024
if server_settings["interface"]:
1025
service.interface = (if_nametoindex
1026
(server_settings["interface"]))
2150
if debug:
2151
# Enable all possible GnuTLS debugging
2152
2153
# "Use a log level over 10 to enable all debugging options."
2154
# - GnuTLS manual
2155
gnutls.library.functions.gnutls_global_set_log_level(11)
2156
2157
@gnutls.library.types.gnutls_log_func
2158
def debug_gnutls(level, string):
2159
logger.debug("GnuTLS: %s", string[:-1])
2160
2161
(gnutls.library.functions
2162
.gnutls_global_set_log_function(debug_gnutls))
2163
2164
# Redirect stdin so all checkers get /dev/null
2165
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2166
os.dup2(null, sys.stdin.fileno())
2167
if null > 2:
2168
os.close(null)
2169
2170
# Need to fork before connecting to D-Bus
2171
if not debug:
2172
# Close all input and output, do double fork, etc.
2173
daemon()
2174
2175
gobject.threads_init()
1027
2176
1028
2177
global main_loop
1029
global bus
1030
global server
1031
2178
# From the Avahi example code
1032
2179
DBusGMainLoop(set_as_default=True )
1033
2180
main_loop = gobject.MainLoop()
1034
2181
bus = dbus.SystemBus()
1035
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
1036
avahi.DBUS_PATH_SERVER),
1037
avahi.DBUS_INTERFACE_SERVER)
1038
2182
# End of Avahi example code
1039
2183
if use_dbus:
1040
bus_name = dbus.service.BusName(u"org.mandos-system.Mandos",
1041
bus)
1042
1043
clients.update(Set(Client(name = section,
1044
config
1045
= dict(client_config.items(section)),
1046
use_dbus = use_dbus)
1047
for section in client_config.sections()))
1048
if not clients:
1049
logger.warning(u"No clients defined")
1050
1051
if debug:
1052
# Redirect stdin so all checkers get /dev/null
1053
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1054
os.dup2(null, sys.stdin.fileno())
1055
if null > 2:
1056
os.close(null)
1057
else:
1058
# No console logging
1059
logger.removeHandler(console)
1060
# Close all input and output, do double fork, etc.
1061
daemon()
1062
1063
try:
1064
pid = os.getpid()
1065
pidfile.write(str(pid) + "\n")
1066
pidfile.close()
1067
del pidfile
1068
except IOError:
1069
logger.error(u"Could not write to file %r with PID %d",
1070
pidfilename, pid)
1071
except NameError:
1072
# "pidfile" was never created
1073
pass
1074
del pidfilename
1075
1076
def cleanup():
1077
"Cleanup function; run on exit"
1078
global group
1079
# From the Avahi example code
1080
if not group is None:
1081
group.Free()
1082
group = None
1083
# End of Avahi example code
2184
try:
2185
bus_name = dbus.service.BusName("se.recompile.Mandos",
2186
bus, do_not_queue=True)
2187
old_bus_name = (dbus.service.BusName
2188
("se.bsnet.fukt.Mandos", bus,
2189
do_not_queue=True))
2190
except dbus.exceptions.NameExistsException as e:
2191
logger.error(unicode(e) + ", disabling D-Bus")
2192
use_dbus = False
2193
server_settings["use_dbus"] = False
2194
tcp_server.use_dbus = False
2195
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2196
service = AvahiServiceToSyslog(name =
2197
server_settings["servicename"],
2198
servicetype = "_mandos._tcp",
2199
protocol = protocol, bus = bus)
2200
if server_settings["interface"]:
2201
service.interface = (if_nametoindex
2202
(str(server_settings["interface"])))
2203
2204
global multiprocessing_manager
2205
multiprocessing_manager = multiprocessing.Manager()
2206
2207
client_class = Client
2208
if use_dbus:
2209
client_class = functools.partial(ClientDBusTransitional,
2210
bus = bus)
2211
2212
client_settings = Client.config_parser(client_config)
2213
old_client_settings = {}
2214
clients_data = {}
2215
2216
# Get client data and settings from last running state.
2217
if server_settings["restore"]:
2218
try:
2219
with open(stored_state_path, "rb") as stored_state:
2220
clients_data, old_client_settings = (pickle.load
2221
(stored_state))
2222
os.remove(stored_state_path)
2223
except IOError as e:
2224
logger.warning("Could not load persistent state: {0}"
2225
.format(e))
2226
if e.errno != errno.ENOENT:
2227
raise
2228
except EOFError as e:
2229
logger.warning("Could not load persistent state: "
2230
"EOFError: {0}".format(e))
2231
2232
with PGPEngine() as pgp:
2233
for client_name, client in clients_data.iteritems():
2234
# Decide which value to use after restoring saved state.
2235
# We have three different values: Old config file,
2236
# new config file, and saved state.
2237
# New config value takes precedence if it differs from old
2238
# config value, otherwise use saved state.
2239
for name, value in client_settings[client_name].items():
2240
try:
2241
# For each value in new config, check if it
2242
# differs from the old config value (Except for
2243
# the "secret" attribute)
2244
if (name != "secret" and
2245
value != old_client_settings[client_name]
2246
[name]):
2247
client[name] = value
2248
except KeyError:
2249
pass
2250
2251
# Clients who has passed its expire date can still be
2252
# enabled if its last checker was successful. Clients
2253
# whose checker failed before we stored its state is
2254
# assumed to have failed all checkers during downtime.
2255
if client["enabled"]:
2256
if datetime.datetime.utcnow() >= client["expires"]:
2257
if not client["last_checked_ok"]:
2258
logger.warning(
2259
"disabling client {0} - Client never "
2260
"performed a successfull checker"
2261
.format(client["name"]))
2262
client["enabled"] = False
2263
elif client["last_checker_status"] != 0:
2264
logger.warning(
2265
"disabling client {0} - Client "
2266
"last checker failed with error code {1}"
2267
.format(client["name"],
2268
client["last_checker_status"]))
2269
client["enabled"] = False
2270
else:
2271
client["expires"] = (datetime.datetime
2272
.utcnow()
2273
+ client["timeout"])
2274
logger.debug("Last checker succeeded,"
2275
" keeping {0} enabled"
2276
.format(client["name"]))
2277
try:
2278
client["secret"] = (
2279
pgp.decrypt(client["encrypted_secret"],
2280
client_settings[client_name]
2281
["secret"]))
2282
except PGPError:
2283
# If decryption fails, we use secret from new settings
2284
logger.debug("Failed to decrypt {0} old secret"
2285
.format(client_name))
2286
client["secret"] = (
2287
client_settings[client_name]["secret"])
2288
2289
2290
# Add/remove clients based on new changes made to config
2291
for client_name in (set(old_client_settings)
2292
- set(client_settings)):
2293
del clients_data[client_name]
2294
for client_name in (set(client_settings)
2295
- set(old_client_settings)):
2296
clients_data[client_name] = client_settings[client_name]
2297
2298
# Create clients all clients
2299
for client_name, client in clients_data.iteritems():
2300
tcp_server.clients[client_name] = client_class(
2301
name = client_name, settings = client)
2302
2303
if not tcp_server.clients:
2304
logger.warning("No clients defined")
1084
2305
1085
while clients:
1086
client = clients.pop()
1087
client.disable_hook = None
1088
client.disable()
1089
1090
atexit.register(cleanup)
1091
1092
2306
if not debug:
2307
try:
2308
with pidfile:
2309
pid = os.getpid()
2310
pidfile.write(str(pid) + "\n".encode("utf-8"))
2311
del pidfile
2312
except IOError:
2313
logger.error("Could not write to file %r with PID %d",
2314
pidfilename, pid)
2315
except NameError:
2316
# "pidfile" was never created
2317
pass
2318
del pidfilename
1093
2319
signal.signal(signal.SIGINT, signal.SIG_IGN)
2320
1094
2321
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1095
2322
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1096
2323
1097
2324
if use_dbus:
1098
class MandosServer(dbus.service.Object):
2325
class MandosDBusService(dbus.service.Object):
1099
2326
"""A D-Bus proxy object"""
1100
2327
def __init__(self):
1101
dbus.service.Object.__init__(self, bus,
1102
"/Mandos")
1103
_interface = u"org.mandos_system.Mandos"
1104
1105
@dbus.service.signal(_interface, signature="oa{sv}")
1106
def ClientAdded(self, objpath, properties):
1107
"D-Bus signal"
1108
pass
1109
2328
dbus.service.Object.__init__(self, bus, "/")
2329
_interface = "se.recompile.Mandos"
2330
1110
2331
@dbus.service.signal(_interface, signature="o")
1111
def ClientRemoved(self, objpath):
1112
"D-Bus signal"
1113
pass
1114
2332
def ClientAdded(self, objpath):
2333
"D-Bus signal"
2334
pass
2335
2336
@dbus.service.signal(_interface, signature="ss")
2337
def ClientNotFound(self, fingerprint, address):
2338
"D-Bus signal"
2339
pass
2340
2341
@dbus.service.signal(_interface, signature="os")
2342
def ClientRemoved(self, objpath, name):
2343
"D-Bus signal"
2344
pass
2345
1115
2346
@dbus.service.method(_interface, out_signature="ao")
1116
2347
def GetAllClients(self):
1117
return dbus.Array(c.dbus_object_path for c in clients)
1118
1119
@dbus.service.method(_interface, out_signature="a{oa{sv}}")
2348
"D-Bus method"
2349
return dbus.Array(c.dbus_object_path
2350
for c in
2351
tcp_server.clients.itervalues())
2352
2353
@dbus.service.method(_interface,
2354
out_signature="a{oa{sv}}")
1120
2355
def GetAllClientsWithProperties(self):
2356
"D-Bus method"
1121
2357
return dbus.Dictionary(
1122
((c.dbus_object_path, c.GetAllProperties())
1123
for c in clients),
2358
((c.dbus_object_path, c.GetAll(""))
2359
for c in tcp_server.clients.itervalues()),
1124
2360
signature="oa{sv}")
1125
2361
1126
2362
@dbus.service.method(_interface, in_signature="o")
1127
2363
def RemoveClient(self, object_path):
1128
for c in clients:
2364
"D-Bus method"
2365
for c in tcp_server.clients.itervalues():
1129
2366
if c.dbus_object_path == object_path:
1130
clients.remove(c)
2367
del tcp_server.clients[c.name]
2368
c.remove_from_connection()
1131
2369
# Don't signal anything except ClientRemoved
1132
c.use_dbus = False
1133
c.disable()
2370
c.disable(quiet=True)
1134
2371
# Emit D-Bus signal
1135
self.ClientRemoved(object_path)
2372
self.ClientRemoved(object_path, c.name)
1136
2373
return
1137
raise KeyError
1138
@dbus.service.method(_interface)
1139
def Quit(self):
1140
main_loop.quit()
1141
2374
raise KeyError(object_path)
2375
1142
2376
del _interface
1143
1144
mandos_server = MandosServer()
1145
1146
for client in clients:
2377
2378
class MandosDBusServiceTransitional(MandosDBusService):
2379
__metaclass__ = AlternateDBusNamesMetaclass
2380
mandos_dbus_service = MandosDBusServiceTransitional()
2381
2382
def cleanup():
2383
"Cleanup function; run on exit"
2384
service.cleanup()
2385
2386
multiprocessing.active_children()
2387
if not (tcp_server.clients or client_settings):
2388
return
2389
2390
# Store client before exiting. Secrets are encrypted with key
2391
# based on what config file has. If config file is
2392
# removed/edited, old secret will thus be unrecovable.
2393
clients = {}
2394
with PGPEngine() as pgp:
2395
for client in tcp_server.clients.itervalues():
2396
key = client_settings[client.name]["secret"]
2397
client.encrypted_secret = pgp.encrypt(client.secret,
2398
key)
2399
client_dict = {}
2400
2401
# A list of attributes that can not be pickled
2402
# + secret.
2403
exclude = set(("bus", "changedstate", "secret",
2404
"checker"))
2405
for name, typ in (inspect.getmembers
2406
(dbus.service.Object)):
2407
exclude.add(name)
2408
2409
client_dict["encrypted_secret"] = (client
2410
.encrypted_secret)
2411
for attr in client.client_structure:
2412
if attr not in exclude:
2413
client_dict[attr] = getattr(client, attr)
2414
2415
clients[client.name] = client_dict
2416
del client_settings[client.name]["secret"]
2417
2418
try:
2419
tempfd, tempname = tempfile.mkstemp(suffix=".pickle",
2420
prefix="clients-",
2421
dir=os.path.dirname
2422
(stored_state_path))
2423
with os.fdopen(tempfd, "wb") as stored_state:
2424
pickle.dump((clients, client_settings), stored_state)
2425
os.rename(tempname, stored_state_path)
2426
except (IOError, OSError) as e:
2427
logger.warning("Could not save persistent state: {0}"
2428
.format(e))
2429
if not debug:
2430
try:
2431
os.remove(tempname)
2432
except NameError:
2433
pass
2434
if e.errno not in set((errno.ENOENT, errno.EACCES,
2435
errno.EEXIST)):
2436
raise e
2437
2438
# Delete all clients, and settings from config
2439
while tcp_server.clients:
2440
name, client = tcp_server.clients.popitem()
2441
if use_dbus:
2442
client.remove_from_connection()
2443
# Don't signal anything except ClientRemoved
2444
client.disable(quiet=True)
2445
if use_dbus:
2446
# Emit D-Bus signal
2447
mandos_dbus_service.ClientRemoved(client
2448
.dbus_object_path,
2449
client.name)
2450
client_settings.clear()
2451
2452
atexit.register(cleanup)
2453
2454
for client in tcp_server.clients.itervalues():
1147
2455
if use_dbus:
1148
2456
# Emit D-Bus signal
1149
mandos_server.ClientAdded(client.dbus_object_path,
1150
client.GetAllProperties())
1151
client.enable()
2457
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2458
# Need to initiate checking of clients
2459
if client.enabled:
2460
client.init_checker()
1152
2461
1153
2462
tcp_server.enable()
1154
2463
tcp_server.server_activate()
1155
2464
1156
2465
# Find out what port we got
1157
2466
service.port = tcp_server.socket.getsockname()[1]
1158
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
1159
u" scope_id %d" % tcp_server.socket.getsockname())
2467
if use_ipv6:
2468
logger.info("Now listening on address %r, port %d,"
2469
" flowinfo %d, scope_id %d"
2470
% tcp_server.socket.getsockname())
2471
else: # IPv4
2472
logger.info("Now listening on address %r, port %d"
2473
% tcp_server.socket.getsockname())
1160
2474
1161
2475
#service.interface = tcp_server.socket.getsockname()[3]
1162
2476
1163
2477
try:
1164
2478
# From the Avahi example code
1165
server.connect_to_signal("StateChanged", server_state_changed)
1166
2479
try:
1167
server_state_changed(server.GetState())
1168
except dbus.exceptions.DBusException, error:
1169
logger.critical(u"DBusException: %s", error)
2480
service.activate()
2481
except dbus.exceptions.DBusException as error:
2482
logger.critical("DBusException: %s", error)
2483
cleanup()
1170
2484
sys.exit(1)
1171
2485
# End of Avahi example code
1172
2486
1175
2489
(tcp_server.handle_request
1176
2490
(*args[2:], **kwargs) or True))
1177
2491
1178
logger.debug(u"Starting main loop")
2492
logger.debug("Starting main loop")
1179
2493
main_loop.run()
1180
except AvahiError, error:
1181
logger.critical(u"AvahiError: %s", error)
2494
except AvahiError as error:
2495
logger.critical("AvahiError: %s", error)
2496
cleanup()
1182
2497
sys.exit(1)
1183
2498
except KeyboardInterrupt:
1184
2499
if debug:
1185
print
2500
print("", file=sys.stderr)
2501
logger.debug("Server received KeyboardInterrupt")
2502
logger.debug("Server exiting")
2503
# Must run before the D-Bus bus name gets deregistered
2504
cleanup()
1186
2505
1187
2506
if __name__ == '__main__':
1188
2507
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0