To get this branch, use:
bzr branch
http://bzr.recompile.se/loggerhead/mandos/release
« back to all changes in this revision
Viewing changes to mandos
- browse files at revision 237.7.80
- compare with another revision
- download diff
- download tarball
- view history from revision 237.7.80
- Committer: teddy at bsnet
- Date: 2011-12-24 23:07:17 UTC
- mto: (237.7.89 trunk) (299.1.1 release) (300.1.1 release) (301.1.1 release)
- mto: This revision was merged to the branch mainline in revision 290.
- Revision ID: teddy@fukt.bsnet.se-20111224230717-yd3c0532w0kaviuc
* plugins.d/mandos-client.c (fprintf_plus): Check format string.
(run_network_hooks): Check for execl() failure.
(run_network_hooks): Check for execl() failure.
- 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 © 2008-2011 Teddy Hogeborn
15
# Copyright © 2008-2011 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 = "1.0.5"
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 = "1.4.1"
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
147
def __enter__(self):
148
return self
149
150
def __exit__ (self, exc_type, exc_value, traceback):
151
self._cleanup()
152
return False
153
154
def __del__(self):
155
self._cleanup()
156
157
def _cleanup(self):
158
if self.tempdir is not None:
159
# Delete contents of tempdir
160
for root, dirs, files in os.walk(self.tempdir,
161
topdown = False):
162
for filename in files:
163
os.remove(os.path.join(root, filename))
164
for dirname in dirs:
165
os.rmdir(os.path.join(root, dirname))
166
# Remove tempdir
167
os.rmdir(self.tempdir)
168
self.tempdir = None
169
170
def password_encode(self, password):
171
# Passphrase can not be empty and can not contain newlines or
172
# NUL bytes. So we prefix it and hex encode it.
173
return b"mandos" + binascii.hexlify(password)
174
175
def encrypt(self, data, password):
176
self.gnupg.passphrase = self.password_encode(password)
177
with open(os.devnull) as devnull:
178
try:
179
proc = self.gnupg.run(['--symmetric'],
180
create_fhs=['stdin', 'stdout'],
181
attach_fhs={'stderr': devnull})
182
with contextlib.closing(proc.handles['stdin']) as f:
183
f.write(data)
184
with contextlib.closing(proc.handles['stdout']) as f:
185
ciphertext = f.read()
186
proc.wait()
187
except IOError as e:
188
raise PGPError(e)
189
self.gnupg.passphrase = None
190
return ciphertext
191
192
def decrypt(self, data, password):
193
self.gnupg.passphrase = self.password_encode(password)
194
with open(os.devnull) as devnull:
195
try:
196
proc = self.gnupg.run(['--decrypt'],
197
create_fhs=['stdin', 'stdout'],
198
attach_fhs={'stderr': devnull})
199
with contextlib.closing(proc.handles['stdin'] ) as f:
200
f.write(data)
201
with contextlib.closing(proc.handles['stdout']) as f:
202
decrypted_plaintext = f.read()
203
proc.wait()
204
except IOError as e:
205
raise PGPError(e)
206
self.gnupg.passphrase = None
207
return decrypted_plaintext
208
209
83
210
84
211
class AvahiError(Exception):
85
212
def __init__(self, value, *args, **kwargs):
97
224
98
225
class AvahiService(object):
99
226
"""An Avahi (Zeroconf) service.
227
100
228
Attributes:
101
229
interface: integer; avahi.IF_UNSPEC or an interface index.
102
230
Used to optionally bind to the specified interface.
110
238
max_renames: integer; maximum number of renames
111
239
rename_count: integer; counter so we only rename after collisions
112
240
a sensible number of times
241
group: D-Bus Entry Group
242
server: D-Bus Server
243
bus: dbus.SystemBus()
113
244
"""
114
245
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
115
246
servicetype = None, port = None, TXT = None,
116
domain = "", host = "", max_renames = 32768):
247
domain = "", host = "", max_renames = 32768,
248
protocol = avahi.PROTO_UNSPEC, bus = None):
117
249
self.interface = interface
118
250
self.name = name
119
251
self.type = servicetype
123
255
self.host = host
124
256
self.rename_count = 0
125
257
self.max_renames = max_renames
258
self.protocol = protocol
259
self.group = None # our entry group
260
self.server = None
261
self.bus = bus
262
self.entry_group_state_changed_match = None
126
263
def rename(self):
127
264
"""Derived from the Avahi example code"""
128
265
if self.rename_count >= self.max_renames:
129
logger.critical(u"No suitable Zeroconf service name found"
130
u" after %i retries, exiting.",
266
logger.critical("No suitable Zeroconf service name found"
267
" after %i retries, exiting.",
131
268
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))
269
raise AvahiServiceError("Too many renames")
270
self.name = unicode(self.server
271
.GetAlternativeServiceName(self.name))
272
logger.info("Changing Zeroconf service name to %r ...",
273
self.name)
139
274
self.remove()
140
self.add()
275
try:
276
self.add()
277
except dbus.exceptions.DBusException as error:
278
logger.critical("DBusException: %s", error)
279
self.cleanup()
280
os._exit(1)
141
281
self.rename_count += 1
142
282
def remove(self):
143
283
"""Derived from the Avahi example code"""
144
if group is not None:
145
group.Reset()
284
if self.entry_group_state_changed_match is not None:
285
self.entry_group_state_changed_match.remove()
286
self.entry_group_state_changed_match = None
287
if self.group is not None:
288
self.group.Reset()
146
289
def add(self):
147
290
"""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):
291
self.remove()
292
if self.group is None:
293
self.group = dbus.Interface(
294
self.bus.get_object(avahi.DBUS_NAME,
295
self.server.EntryGroupNew()),
296
avahi.DBUS_INTERFACE_ENTRY_GROUP)
297
self.entry_group_state_changed_match = (
298
self.group.connect_to_signal(
299
'StateChanged', self.entry_group_state_changed))
300
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
301
self.name, self.type)
302
self.group.AddService(
303
self.interface,
304
self.protocol,
305
dbus.UInt32(0), # flags
306
self.name, self.type,
307
self.domain, self.host,
308
dbus.UInt16(self.port),
309
avahi.string_array_to_txt_array(self.TXT))
310
self.group.Commit()
311
def entry_group_state_changed(self, state, error):
312
"""Derived from the Avahi example code"""
313
logger.debug("Avahi entry group state change: %i", state)
314
315
if state == avahi.ENTRY_GROUP_ESTABLISHED:
316
logger.debug("Zeroconf service established.")
317
elif state == avahi.ENTRY_GROUP_COLLISION:
318
logger.info("Zeroconf service name collision.")
319
self.rename()
320
elif state == avahi.ENTRY_GROUP_FAILURE:
321
logger.critical("Avahi: Error in group state changed %s",
322
unicode(error))
323
raise AvahiGroupError("State changed: %s"
324
% unicode(error))
325
def cleanup(self):
326
"""Derived from the Avahi example code"""
327
if self.group is not None:
328
try:
329
self.group.Free()
330
except (dbus.exceptions.UnknownMethodException,
331
dbus.exceptions.DBusException):
332
pass
333
self.group = None
334
self.remove()
335
def server_state_changed(self, state, error=None):
336
"""Derived from the Avahi example code"""
337
logger.debug("Avahi server state change: %i", state)
338
bad_states = { avahi.SERVER_INVALID:
339
"Zeroconf server invalid",
340
avahi.SERVER_REGISTERING: None,
341
avahi.SERVER_COLLISION:
342
"Zeroconf server name collision",
343
avahi.SERVER_FAILURE:
344
"Zeroconf server failure" }
345
if state in bad_states:
346
if bad_states[state] is not None:
347
if error is None:
348
logger.error(bad_states[state])
349
else:
350
logger.error(bad_states[state] + ": %r", error)
351
self.cleanup()
352
elif state == avahi.SERVER_RUNNING:
353
self.add()
354
else:
355
if error is None:
356
logger.debug("Unknown state: %r", state)
357
else:
358
logger.debug("Unknown state: %r: %r", state, error)
359
def activate(self):
360
"""Derived from the Avahi example code"""
361
if self.server is None:
362
self.server = dbus.Interface(
363
self.bus.get_object(avahi.DBUS_NAME,
364
avahi.DBUS_PATH_SERVER,
365
follow_name_owner_changes=True),
366
avahi.DBUS_INTERFACE_SERVER)
367
self.server.connect_to_signal("StateChanged",
368
self.server_state_changed)
369
self.server_state_changed(self.server.GetState())
370
371
class AvahiServiceToSyslog(AvahiService):
372
def rename(self):
373
"""Add the new name to the syslog messages"""
374
ret = AvahiService.rename(self)
375
syslogger.setFormatter(logging.Formatter
376
('Mandos (%s) [%%(process)d]:'
377
' %%(levelname)s: %%(message)s'
378
% self.name))
379
return ret
380
381
def timedelta_to_milliseconds(td):
382
"Convert a datetime.timedelta() to milliseconds"
383
return ((td.days * 24 * 60 * 60 * 1000)
384
+ (td.seconds * 1000)
385
+ (td.microseconds // 1000))
386
387
class Client(object):
179
388
"""A representation of a client host served by this server.
389
180
390
Attributes:
181
name: string; from the config file, used in log messages and
182
D-Bus identifiers
391
approved: bool(); 'None' if not yet approved/disapproved
392
approval_delay: datetime.timedelta(); Time to wait for approval
393
approval_duration: datetime.timedelta(); Duration of one approval
394
checker: subprocess.Popen(); a running checker process used
395
to see if the client lives.
396
'None' if no process is running.
397
checker_callback_tag: a gobject event source tag, or None
398
checker_command: string; External command which is run to check
399
if client lives. %() expansions are done at
400
runtime with vars(self) as dict, so that for
401
instance %(name)s can be used in the command.
402
checker_initiator_tag: a gobject event source tag, or None
403
created: datetime.datetime(); (UTC) object creation
404
client_structure: Object describing what attributes a client has
405
and is used for storing the client at exit
406
current_checker_command: string; current running checker_command
407
disable_initiator_tag: a gobject event source tag, or None
408
enabled: bool()
183
409
fingerprint: string (40 or 32 hexadecimal digits); used to
184
410
uniquely identify the client
185
secret: bytestring; sent verbatim (over TLS) to client
186
411
host: string; available for use by the checker command
187
created: datetime.datetime(); (UTC) object creation
188
last_enabled: datetime.datetime(); (UTC)
189
enabled: bool()
412
interval: datetime.timedelta(); How often to start a new checker
413
last_approval_request: datetime.datetime(); (UTC) or None
190
414
last_checked_ok: datetime.datetime(); (UTC) or None
415
last_checker_status: integer between 0 and 255 reflecting exit
416
status of last checker. -1 reflects crashed
417
checker, or None.
418
last_enabled: datetime.datetime(); (UTC) or None
419
name: string; from the config file, used in log messages and
420
D-Bus identifiers
421
secret: bytestring; sent verbatim (over TLS) to client
191
422
timeout: datetime.timedelta(); How long from last_checked_ok
192
until this client is invalid
193
interval: datetime.timedelta(); How often to start a new checker
194
disable_hook: If set, called by disable() as disable_hook(self)
195
checker: subprocess.Popen(); a running checker process used
196
to see if the client lives.
197
'None' if no process is running.
198
checker_initiator_tag: a gobject event source tag, or None
199
disable_initiator_tag: - '' -
200
checker_callback_tag: - '' -
201
checker_command: string; External command which is run to check if
202
client lives. %() expansions are done at
203
runtime with vars(self) as dict, so that for
204
instance %(name)s can be used in the command.
205
use_dbus: bool(); Whether to provide D-Bus interface and signals
206
dbus_object_path: dbus.ObjectPath ; only set if self.use_dbus
423
until this client is disabled
424
extended_timeout: extra long timeout when password has been sent
425
runtime_expansions: Allowed attributes for runtime expansion.
426
expires: datetime.datetime(); time (UTC) when a client will be
427
disabled, or None
207
428
"""
429
430
runtime_expansions = ("approval_delay", "approval_duration",
431
"created", "enabled", "fingerprint",
432
"host", "interval", "last_checked_ok",
433
"last_enabled", "name", "timeout")
434
client_defaults = { "timeout": "5m",
435
"extended_timeout": "15m",
436
"interval": "2m",
437
"checker": "fping -q -- %%(host)s",
438
"host": "",
439
"approval_delay": "0s",
440
"approval_duration": "1s",
441
"approved_by_default": "True",
442
"enabled": "True",
443
}
444
208
445
def timeout_milliseconds(self):
209
446
"Return the 'timeout' attribute in milliseconds"
210
return ((self.timeout.days * 24 * 60 * 60 * 1000)
211
+ (self.timeout.seconds * 1000)
212
+ (self.timeout.microseconds // 1000))
447
return timedelta_to_milliseconds(self.timeout)
448
449
def extended_timeout_milliseconds(self):
450
"Return the 'extended_timeout' attribute in milliseconds"
451
return timedelta_to_milliseconds(self.extended_timeout)
213
452
214
453
def interval_milliseconds(self):
215
454
"Return the 'interval' attribute in milliseconds"
216
return ((self.interval.days * 24 * 60 * 60 * 1000)
217
+ (self.interval.seconds * 1000)
218
+ (self.interval.microseconds // 1000))
455
return timedelta_to_milliseconds(self.interval)
219
456
220
def __init__(self, name = None, disable_hook=None, config=None,
221
use_dbus=True):
457
def approval_delay_milliseconds(self):
458
return timedelta_to_milliseconds(self.approval_delay)
459
460
@staticmethod
461
def config_parser(config):
462
""" Construct a new dict of client settings of this form:
463
{ client_name: {setting_name: value, ...}, ...}
464
with exceptions for any special settings as defined above"""
465
settings = {}
466
for client_name in config.sections():
467
section = dict(config.items(client_name))
468
client = settings[client_name] = {}
469
470
client["host"] = section["host"]
471
# Reformat values from string types to Python types
472
client["approved_by_default"] = config.getboolean(
473
client_name, "approved_by_default")
474
client["enabled"] = config.getboolean(client_name, "enabled")
475
476
client["fingerprint"] = (section["fingerprint"].upper()
477
.replace(" ", ""))
478
if "secret" in section:
479
client["secret"] = section["secret"].decode("base64")
480
elif "secfile" in section:
481
with open(os.path.expanduser(os.path.expandvars
482
(section["secfile"])),
483
"rb") as secfile:
484
client["secret"] = secfile.read()
485
else:
486
raise TypeError("No secret or secfile for section %s"
487
% section)
488
client["timeout"] = string_to_delta(section["timeout"])
489
client["extended_timeout"] = string_to_delta(
490
section["extended_timeout"])
491
client["interval"] = string_to_delta(section["interval"])
492
client["approval_delay"] = string_to_delta(
493
section["approval_delay"])
494
client["approval_duration"] = string_to_delta(
495
section["approval_duration"])
496
client["checker_command"] = section["checker"]
497
client["last_approval_request"] = None
498
client["last_checked_ok"] = None
499
client["last_checker_status"] = None
500
if client["enabled"]:
501
client["last_enabled"] = datetime.datetime.utcnow()
502
client["expires"] = (datetime.datetime.utcnow()
503
+ client["timeout"])
504
else:
505
client["last_enabled"] = None
506
client["expires"] = None
507
508
return settings
509
510
511
def __init__(self, settings, name = None):
222
512
"""Note: the 'checker' key in 'config' sets the
223
513
'checker_command' attribute and *not* the 'checker'
224
514
attribute."""
225
515
self.name = name
226
if config is None:
227
config = {}
228
logger.debug(u"Creating client %r", self.name)
229
self.use_dbus = False # During __init__
516
# adding all client settings
517
for setting, value in settings.iteritems():
518
setattr(self, setting, value)
519
520
logger.debug("Creating client %r", self.name)
230
521
# Uppercase and remove spaces from fingerprint for later
231
522
# comparison purposes with return value from the fingerprint()
232
523
# function
233
self.fingerprint = (config["fingerprint"].upper()
234
.replace(u" ", u""))
235
logger.debug(u" Fingerprint: %s", self.fingerprint)
236
if "secret" in config:
237
self.secret = config["secret"].decode(u"base64")
238
elif "secfile" in config:
239
with closing(open(os.path.expanduser
240
(os.path.expandvars
241
(config["secfile"])))) as secfile:
242
self.secret = secfile.read()
243
else:
244
raise TypeError(u"No secret or secfile for client %s"
245
% self.name)
246
self.host = config.get("host", "")
247
self.created = datetime.datetime.utcnow()
248
self.enabled = False
249
self.last_enabled = None
250
self.last_checked_ok = None
251
self.timeout = string_to_delta(config["timeout"])
252
self.interval = string_to_delta(config["interval"])
253
self.disable_hook = disable_hook
524
logger.debug(" Fingerprint: %s", self.fingerprint)
525
self.created = settings.get("created", datetime.datetime.utcnow())
526
527
# attributes specific for this server instance
254
528
self.checker = None
255
529
self.checker_initiator_tag = None
256
530
self.disable_initiator_tag = None
257
531
self.checker_callback_tag = None
258
self.checker_command = config["checker"]
259
self.last_connect = None
260
# Only now, when this client is initialized, can it show up on
261
# the D-Bus
262
self.use_dbus = use_dbus
263
if self.use_dbus:
264
self.dbus_object_path = (dbus.ObjectPath
265
("/clients/"
266
+ self.name.replace(".", "_")))
267
dbus.service.Object.__init__(self, bus,
268
self.dbus_object_path)
532
self.current_checker_command = None
533
self.approved = None
534
self.approvals_pending = 0
535
self.changedstate = (multiprocessing_manager
536
.Condition(multiprocessing_manager
537
.Lock()))
538
self.client_structure = [attr for attr in
539
self.__dict__.iterkeys()
540
if not attr.startswith("_")]
541
self.client_structure.append("client_structure")
542
543
for name, t in inspect.getmembers(type(self),
544
lambda obj:
545
isinstance(obj,
546
property)):
547
if not name.startswith("_"):
548
self.client_structure.append(name)
549
550
# Send notice to process children that client state has changed
551
def send_changedstate(self):
552
with self.changedstate:
553
self.changedstate.notify_all()
269
554
270
555
def enable(self):
271
556
"""Start this client's checker and timeout hooks"""
557
if getattr(self, "enabled", False):
558
# Already enabled
559
return
560
self.send_changedstate()
561
self.expires = datetime.datetime.utcnow() + self.timeout
562
self.enabled = True
272
563
self.last_enabled = datetime.datetime.utcnow()
564
self.init_checker()
565
566
def disable(self, quiet=True):
567
"""Disable this client."""
568
if not getattr(self, "enabled", False):
569
return False
570
if not quiet:
571
self.send_changedstate()
572
if not quiet:
573
logger.info("Disabling client %s", self.name)
574
if getattr(self, "disable_initiator_tag", False):
575
gobject.source_remove(self.disable_initiator_tag)
576
self.disable_initiator_tag = None
577
self.expires = None
578
if getattr(self, "checker_initiator_tag", False):
579
gobject.source_remove(self.checker_initiator_tag)
580
self.checker_initiator_tag = None
581
self.stop_checker()
582
self.enabled = False
583
# Do not run this again if called by a gobject.timeout_add
584
return False
585
586
def __del__(self):
587
self.disable()
588
589
def init_checker(self):
273
590
# Schedule a new checker to be started an 'interval' from now,
274
591
# and every interval from then on.
275
592
self.checker_initiator_tag = (gobject.timeout_add
276
593
(self.interval_milliseconds(),
277
594
self.start_checker))
278
# Also start a new checker *right now*.
279
self.start_checker()
280
595
# Schedule a disable() when 'timeout' has passed
281
596
self.disable_initiator_tag = (gobject.timeout_add
282
597
(self.timeout_milliseconds(),
283
598
self.disable))
284
self.enabled = True
285
if self.use_dbus:
286
# Emit D-Bus signals
287
self.PropertyChanged(dbus.String(u"enabled"),
288
dbus.Boolean(True, variant_level=1))
289
self.PropertyChanged(dbus.String(u"last_enabled"),
290
(_datetime_to_dbus(self.last_enabled,
291
variant_level=1)))
292
293
def disable(self):
294
"""Disable this client."""
295
if not getattr(self, "enabled", False):
296
return False
297
logger.info(u"Disabling client %s", self.name)
298
if getattr(self, "disable_initiator_tag", False):
299
gobject.source_remove(self.disable_initiator_tag)
300
self.disable_initiator_tag = None
301
if getattr(self, "checker_initiator_tag", False):
302
gobject.source_remove(self.checker_initiator_tag)
303
self.checker_initiator_tag = None
304
self.stop_checker()
305
if self.disable_hook:
306
self.disable_hook(self)
307
self.enabled = False
308
if self.use_dbus:
309
# Emit D-Bus signal
310
self.PropertyChanged(dbus.String(u"enabled"),
311
dbus.Boolean(False, variant_level=1))
312
# Do not run this again if called by a gobject.timeout_add
313
return False
314
315
def __del__(self):
316
self.disable_hook = None
317
self.disable()
599
# Also start a new checker *right now*.
600
self.start_checker()
318
601
319
602
def checker_callback(self, pid, condition, command):
320
603
"""The checker has completed, so take appropriate actions."""
321
604
self.checker_callback_tag = None
322
605
self.checker = None
323
if self.use_dbus:
324
# Emit D-Bus signal
325
self.PropertyChanged(dbus.String(u"checker_running"),
326
dbus.Boolean(False, variant_level=1))
327
606
if os.WIFEXITED(condition):
328
exitstatus = os.WEXITSTATUS(condition)
329
if exitstatus == 0:
330
logger.info(u"Checker for %(name)s succeeded",
607
self.last_checker_status = os.WEXITSTATUS(condition)
608
if self.last_checker_status == 0:
609
logger.info("Checker for %(name)s succeeded",
331
610
vars(self))
332
611
self.checked_ok()
333
612
else:
334
logger.info(u"Checker for %(name)s failed",
613
logger.info("Checker for %(name)s failed",
335
614
vars(self))
336
if self.use_dbus:
337
# Emit D-Bus signal
338
self.CheckerCompleted(dbus.Int16(exitstatus),
339
dbus.Int64(condition),
340
dbus.String(command))
341
615
else:
342
logger.warning(u"Checker for %(name)s crashed?",
616
self.last_checker_status = -1
617
logger.warning("Checker for %(name)s crashed?",
343
618
vars(self))
344
if self.use_dbus:
345
# Emit D-Bus signal
346
self.CheckerCompleted(dbus.Int16(-1),
347
dbus.Int64(condition),
348
dbus.String(command))
349
619
350
def checked_ok(self):
620
def checked_ok(self, timeout=None):
351
621
"""Bump up the timeout for this client.
622
352
623
This should only be called when the client has been seen,
353
624
alive and well.
354
625
"""
626
if timeout is None:
627
timeout = self.timeout
355
628
self.last_checked_ok = datetime.datetime.utcnow()
356
gobject.source_remove(self.disable_initiator_tag)
357
self.disable_initiator_tag = (gobject.timeout_add
358
(self.timeout_milliseconds(),
359
self.disable))
360
if self.use_dbus:
361
# Emit D-Bus signal
362
self.PropertyChanged(
363
dbus.String(u"last_checked_ok"),
364
(_datetime_to_dbus(self.last_checked_ok,
365
variant_level=1)))
629
if self.disable_initiator_tag is not None:
630
gobject.source_remove(self.disable_initiator_tag)
631
if getattr(self, "enabled", False):
632
self.disable_initiator_tag = (gobject.timeout_add
633
(timedelta_to_milliseconds
634
(timeout), self.disable))
635
self.expires = datetime.datetime.utcnow() + timeout
636
637
def need_approval(self):
638
self.last_approval_request = datetime.datetime.utcnow()
366
639
367
640
def start_checker(self):
368
641
"""Start a new checker subprocess if one is not running.
642
369
643
If a checker already exists, leave it running and do
370
644
nothing."""
371
645
# The reason for not killing a running checker is that if we
374
648
# client would inevitably timeout, since no checker would get
375
649
# a chance to run to completion. If we instead leave running
376
650
# checkers alone, the checker would have to take more time
377
# than 'timeout' for the client to be declared invalid, which
378
# is as it should be.
651
# than 'timeout' for the client to be disabled, which is as it
652
# should be.
653
654
# If a checker exists, make sure it is not a zombie
655
try:
656
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
657
except (AttributeError, OSError) as error:
658
if (isinstance(error, OSError)
659
and error.errno != errno.ECHILD):
660
raise error
661
else:
662
if pid:
663
logger.warning("Checker was a zombie")
664
gobject.source_remove(self.checker_callback_tag)
665
self.checker_callback(pid, status,
666
self.current_checker_command)
667
# Start a new checker if needed
379
668
if self.checker is None:
380
669
try:
381
670
# In case checker_command has exactly one % operator
382
671
command = self.checker_command % self.host
383
672
except TypeError:
384
673
# Escape attributes for the shell
385
escaped_attrs = dict((key, re.escape(str(val)))
386
for key, val in
387
vars(self).iteritems())
674
escaped_attrs = dict(
675
(attr,
676
re.escape(unicode(str(getattr(self, attr, "")),
677
errors=
678
'replace')))
679
for attr in
680
self.runtime_expansions)
681
388
682
try:
389
683
command = self.checker_command % escaped_attrs
390
except TypeError, error:
391
logger.error(u'Could not format string "%s":'
392
u' %s', self.checker_command, error)
684
except TypeError as error:
685
logger.error('Could not format string "%s":'
686
' %s', self.checker_command, error)
393
687
return True # Try again later
688
self.current_checker_command = command
394
689
try:
395
logger.info(u"Starting checker %r for %s",
690
logger.info("Starting checker %r for %s",
396
691
command, self.name)
397
692
# We don't need to redirect stdout and stderr, since
398
693
# in normal mode, that is already done by daemon(),
401
696
self.checker = subprocess.Popen(command,
402
697
close_fds=True,
403
698
shell=True, cwd="/")
404
if self.use_dbus:
405
# Emit D-Bus signal
406
self.CheckerStarted(command)
407
self.PropertyChanged(
408
dbus.String("checker_running"),
409
dbus.Boolean(True, variant_level=1))
410
699
self.checker_callback_tag = (gobject.child_watch_add
411
700
(self.checker.pid,
412
701
self.checker_callback,
413
702
data=command))
414
except OSError, error:
415
logger.error(u"Failed to start subprocess: %s",
703
# The checker may have completed before the gobject
704
# watch was added. Check for this.
705
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
706
if pid:
707
gobject.source_remove(self.checker_callback_tag)
708
self.checker_callback(pid, status, command)
709
except OSError as error:
710
logger.error("Failed to start subprocess: %s",
416
711
error)
417
712
# Re-run this periodically if run by gobject.timeout_add
418
713
return True
424
719
self.checker_callback_tag = None
425
720
if getattr(self, "checker", None) is None:
426
721
return
427
logger.debug(u"Stopping checker for %(name)s", vars(self))
722
logger.debug("Stopping checker for %(name)s", vars(self))
428
723
try:
429
724
os.kill(self.checker.pid, signal.SIGTERM)
430
#os.sleep(0.5)
725
#time.sleep(0.5)
431
726
#if self.checker.poll() is None:
432
727
# os.kill(self.checker.pid, signal.SIGKILL)
433
except OSError, error:
728
except OSError as error:
434
729
if error.errno != errno.ESRCH: # No such process
435
730
raise
436
731
self.checker = None
437
if self.use_dbus:
438
self.PropertyChanged(dbus.String(u"checker_running"),
439
dbus.Boolean(False, variant_level=1))
440
441
def still_valid(self):
442
"""Has the timeout not yet passed for this client?"""
443
if not getattr(self, "enabled", False):
444
return False
445
now = datetime.datetime.utcnow()
446
if self.last_checked_ok is None:
447
return now < (self.created + self.timeout)
448
else:
449
return now < (self.last_checked_ok + self.timeout)
450
451
## D-Bus methods & signals
452
_interface = u"se.bsnet.fukt.Mandos.Client"
453
454
# CheckedOK - method
455
CheckedOK = dbus.service.method(_interface)(checked_ok)
456
CheckedOK.__name__ = "CheckedOK"
732
733
734
def dbus_service_property(dbus_interface, signature="v",
735
access="readwrite", byte_arrays=False):
736
"""Decorators for marking methods of a DBusObjectWithProperties to
737
become properties on the D-Bus.
738
739
The decorated method will be called with no arguments by "Get"
740
and with one argument by "Set".
741
742
The parameters, where they are supported, are the same as
743
dbus.service.method, except there is only "signature", since the
744
type from Get() and the type sent to Set() is the same.
745
"""
746
# Encoding deeply encoded byte arrays is not supported yet by the
747
# "Set" method, so we fail early here:
748
if byte_arrays and signature != "ay":
749
raise ValueError("Byte arrays not supported for non-'ay'"
750
" signature %r" % signature)
751
def decorator(func):
752
func._dbus_is_property = True
753
func._dbus_interface = dbus_interface
754
func._dbus_signature = signature
755
func._dbus_access = access
756
func._dbus_name = func.__name__
757
if func._dbus_name.endswith("_dbus_property"):
758
func._dbus_name = func._dbus_name[:-14]
759
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
760
return func
761
return decorator
762
763
764
class DBusPropertyException(dbus.exceptions.DBusException):
765
"""A base class for D-Bus property-related exceptions
766
"""
767
def __unicode__(self):
768
return unicode(str(self))
769
770
771
class DBusPropertyAccessException(DBusPropertyException):
772
"""A property's access permissions disallows an operation.
773
"""
774
pass
775
776
777
class DBusPropertyNotFound(DBusPropertyException):
778
"""An attempt was made to access a non-existing property.
779
"""
780
pass
781
782
783
class DBusObjectWithProperties(dbus.service.Object):
784
"""A D-Bus object with properties.
785
786
Classes inheriting from this can use the dbus_service_property
787
decorator to expose methods as D-Bus properties. It exposes the
788
standard Get(), Set(), and GetAll() methods on the D-Bus.
789
"""
790
791
@staticmethod
792
def _is_dbus_property(obj):
793
return getattr(obj, "_dbus_is_property", False)
794
795
def _get_all_dbus_properties(self):
796
"""Returns a generator of (name, attribute) pairs
797
"""
798
return ((prop.__get__(self)._dbus_name, prop.__get__(self))
799
for cls in self.__class__.__mro__
800
for name, prop in
801
inspect.getmembers(cls, self._is_dbus_property))
802
803
def _get_dbus_property(self, interface_name, property_name):
804
"""Returns a bound method if one exists which is a D-Bus
805
property with the specified name and interface.
806
"""
807
for cls in self.__class__.__mro__:
808
for name, value in (inspect.getmembers
809
(cls, self._is_dbus_property)):
810
if (value._dbus_name == property_name
811
and value._dbus_interface == interface_name):
812
return value.__get__(self)
813
814
# No such property
815
raise DBusPropertyNotFound(self.dbus_object_path + ":"
816
+ interface_name + "."
817
+ property_name)
818
819
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
820
out_signature="v")
821
def Get(self, interface_name, property_name):
822
"""Standard D-Bus property Get() method, see D-Bus standard.
823
"""
824
prop = self._get_dbus_property(interface_name, property_name)
825
if prop._dbus_access == "write":
826
raise DBusPropertyAccessException(property_name)
827
value = prop()
828
if not hasattr(value, "variant_level"):
829
return value
830
return type(value)(value, variant_level=value.variant_level+1)
831
832
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
833
def Set(self, interface_name, property_name, value):
834
"""Standard D-Bus property Set() method, see D-Bus standard.
835
"""
836
prop = self._get_dbus_property(interface_name, property_name)
837
if prop._dbus_access == "read":
838
raise DBusPropertyAccessException(property_name)
839
if prop._dbus_get_args_options["byte_arrays"]:
840
# The byte_arrays option is not supported yet on
841
# signatures other than "ay".
842
if prop._dbus_signature != "ay":
843
raise ValueError
844
value = dbus.ByteArray(''.join(unichr(byte)
845
for byte in value))
846
prop(value)
847
848
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
849
out_signature="a{sv}")
850
def GetAll(self, interface_name):
851
"""Standard D-Bus property GetAll() method, see D-Bus
852
standard.
853
854
Note: Will not include properties with access="write".
855
"""
856
properties = {}
857
for name, prop in self._get_all_dbus_properties():
858
if (interface_name
859
and interface_name != prop._dbus_interface):
860
# Interface non-empty but did not match
861
continue
862
# Ignore write-only properties
863
if prop._dbus_access == "write":
864
continue
865
value = prop()
866
if not hasattr(value, "variant_level"):
867
properties[name] = value
868
continue
869
properties[name] = type(value)(value, variant_level=
870
value.variant_level+1)
871
return dbus.Dictionary(properties, signature="sv")
872
873
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
874
out_signature="s",
875
path_keyword='object_path',
876
connection_keyword='connection')
877
def Introspect(self, object_path, connection):
878
"""Standard D-Bus method, overloaded to insert property tags.
879
"""
880
xmlstring = dbus.service.Object.Introspect(self, object_path,
881
connection)
882
try:
883
document = xml.dom.minidom.parseString(xmlstring)
884
def make_tag(document, name, prop):
885
e = document.createElement("property")
886
e.setAttribute("name", name)
887
e.setAttribute("type", prop._dbus_signature)
888
e.setAttribute("access", prop._dbus_access)
889
return e
890
for if_tag in document.getElementsByTagName("interface"):
891
for tag in (make_tag(document, name, prop)
892
for name, prop
893
in self._get_all_dbus_properties()
894
if prop._dbus_interface
895
== if_tag.getAttribute("name")):
896
if_tag.appendChild(tag)
897
# Add the names to the return values for the
898
# "org.freedesktop.DBus.Properties" methods
899
if (if_tag.getAttribute("name")
900
== "org.freedesktop.DBus.Properties"):
901
for cn in if_tag.getElementsByTagName("method"):
902
if cn.getAttribute("name") == "Get":
903
for arg in cn.getElementsByTagName("arg"):
904
if (arg.getAttribute("direction")
905
== "out"):
906
arg.setAttribute("name", "value")
907
elif cn.getAttribute("name") == "GetAll":
908
for arg in cn.getElementsByTagName("arg"):
909
if (arg.getAttribute("direction")
910
== "out"):
911
arg.setAttribute("name", "props")
912
xmlstring = document.toxml("utf-8")
913
document.unlink()
914
except (AttributeError, xml.dom.DOMException,
915
xml.parsers.expat.ExpatError) as error:
916
logger.error("Failed to override Introspection method",
917
error)
918
return xmlstring
919
920
921
def datetime_to_dbus (dt, variant_level=0):
922
"""Convert a UTC datetime.datetime() to a D-Bus type."""
923
if dt is None:
924
return dbus.String("", variant_level = variant_level)
925
return dbus.String(dt.isoformat(),
926
variant_level=variant_level)
927
928
929
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
930
.__metaclass__):
931
"""Applied to an empty subclass of a D-Bus object, this metaclass
932
will add additional D-Bus attributes matching a certain pattern.
933
"""
934
def __new__(mcs, name, bases, attr):
935
# Go through all the base classes which could have D-Bus
936
# methods, signals, or properties in them
937
for base in (b for b in bases
938
if issubclass(b, dbus.service.Object)):
939
# Go though all attributes of the base class
940
for attrname, attribute in inspect.getmembers(base):
941
# Ignore non-D-Bus attributes, and D-Bus attributes
942
# with the wrong interface name
943
if (not hasattr(attribute, "_dbus_interface")
944
or not attribute._dbus_interface
945
.startswith("se.recompile.Mandos")):
946
continue
947
# Create an alternate D-Bus interface name based on
948
# the current name
949
alt_interface = (attribute._dbus_interface
950
.replace("se.recompile.Mandos",
951
"se.bsnet.fukt.Mandos"))
952
# Is this a D-Bus signal?
953
if getattr(attribute, "_dbus_is_signal", False):
954
# Extract the original non-method function by
955
# black magic
956
nonmethod_func = (dict(
957
zip(attribute.func_code.co_freevars,
958
attribute.__closure__))["func"]
959
.cell_contents)
960
# Create a new, but exactly alike, function
961
# object, and decorate it to be a new D-Bus signal
962
# with the alternate D-Bus interface name
963
new_function = (dbus.service.signal
964
(alt_interface,
965
attribute._dbus_signature)
966
(types.FunctionType(
967
nonmethod_func.func_code,
968
nonmethod_func.func_globals,
969
nonmethod_func.func_name,
970
nonmethod_func.func_defaults,
971
nonmethod_func.func_closure)))
972
# Define a creator of a function to call both the
973
# old and new functions, so both the old and new
974
# signals gets sent when the function is called
975
def fixscope(func1, func2):
976
"""This function is a scope container to pass
977
func1 and func2 to the "call_both" function
978
outside of its arguments"""
979
def call_both(*args, **kwargs):
980
"""This function will emit two D-Bus
981
signals by calling func1 and func2"""
982
func1(*args, **kwargs)
983
func2(*args, **kwargs)
984
return call_both
985
# Create the "call_both" function and add it to
986
# the class
987
attr[attrname] = fixscope(attribute,
988
new_function)
989
# Is this a D-Bus method?
990
elif getattr(attribute, "_dbus_is_method", False):
991
# Create a new, but exactly alike, function
992
# object. Decorate it to be a new D-Bus method
993
# with the alternate D-Bus interface name. Add it
994
# to the class.
995
attr[attrname] = (dbus.service.method
996
(alt_interface,
997
attribute._dbus_in_signature,
998
attribute._dbus_out_signature)
999
(types.FunctionType
1000
(attribute.func_code,
1001
attribute.func_globals,
1002
attribute.func_name,
1003
attribute.func_defaults,
1004
attribute.func_closure)))
1005
# Is this a D-Bus property?
1006
elif getattr(attribute, "_dbus_is_property", False):
1007
# Create a new, but exactly alike, function
1008
# object, and decorate it to be a new D-Bus
1009
# property with the alternate D-Bus interface
1010
# name. Add it to the class.
1011
attr[attrname] = (dbus_service_property
1012
(alt_interface,
1013
attribute._dbus_signature,
1014
attribute._dbus_access,
1015
attribute
1016
._dbus_get_args_options
1017
["byte_arrays"])
1018
(types.FunctionType
1019
(attribute.func_code,
1020
attribute.func_globals,
1021
attribute.func_name,
1022
attribute.func_defaults,
1023
attribute.func_closure)))
1024
return type.__new__(mcs, name, bases, attr)
1025
1026
1027
class ClientDBus(Client, DBusObjectWithProperties):
1028
"""A Client class using D-Bus
1029
1030
Attributes:
1031
dbus_object_path: dbus.ObjectPath
1032
bus: dbus.SystemBus()
1033
"""
1034
1035
runtime_expansions = (Client.runtime_expansions
1036
+ ("dbus_object_path",))
1037
1038
# dbus.service.Object doesn't use super(), so we can't either.
1039
1040
def __init__(self, bus = None, *args, **kwargs):
1041
self.bus = bus
1042
Client.__init__(self, *args, **kwargs)
1043
self._approvals_pending = 0
1044
1045
self._approvals_pending = 0
1046
# Only now, when this client is initialized, can it show up on
1047
# the D-Bus
1048
client_object_name = unicode(self.name).translate(
1049
{ord("."): ord("_"),
1050
ord("-"): ord("_")})
1051
self.dbus_object_path = (dbus.ObjectPath
1052
("/clients/" + client_object_name))
1053
DBusObjectWithProperties.__init__(self, self.bus,
1054
self.dbus_object_path)
1055
1056
def notifychangeproperty(transform_func,
1057
dbus_name, type_func=lambda x: x,
1058
variant_level=1):
1059
""" Modify a variable so that it's a property which announces
1060
its changes to DBus.
1061
1062
transform_fun: Function that takes a value and a variant_level
1063
and transforms it to a D-Bus type.
1064
dbus_name: D-Bus name of the variable
1065
type_func: Function that transform the value before sending it
1066
to the D-Bus. Default: no transform
1067
variant_level: D-Bus variant level. Default: 1
1068
"""
1069
attrname = "_{0}".format(dbus_name)
1070
def setter(self, value):
1071
if hasattr(self, "dbus_object_path"):
1072
if (not hasattr(self, attrname) or
1073
type_func(getattr(self, attrname, None))
1074
!= type_func(value)):
1075
dbus_value = transform_func(type_func(value),
1076
variant_level
1077
=variant_level)
1078
self.PropertyChanged(dbus.String(dbus_name),
1079
dbus_value)
1080
setattr(self, attrname, value)
1081
1082
return property(lambda self: getattr(self, attrname), setter)
1083
1084
1085
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1086
approvals_pending = notifychangeproperty(dbus.Boolean,
1087
"ApprovalPending",
1088
type_func = bool)
1089
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1090
last_enabled = notifychangeproperty(datetime_to_dbus,
1091
"LastEnabled")
1092
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1093
type_func = lambda checker:
1094
checker is not None)
1095
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1096
"LastCheckedOK")
1097
last_approval_request = notifychangeproperty(
1098
datetime_to_dbus, "LastApprovalRequest")
1099
approved_by_default = notifychangeproperty(dbus.Boolean,
1100
"ApprovedByDefault")
1101
approval_delay = notifychangeproperty(dbus.UInt64,
1102
"ApprovalDelay",
1103
type_func =
1104
timedelta_to_milliseconds)
1105
approval_duration = notifychangeproperty(
1106
dbus.UInt64, "ApprovalDuration",
1107
type_func = timedelta_to_milliseconds)
1108
host = notifychangeproperty(dbus.String, "Host")
1109
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1110
type_func =
1111
timedelta_to_milliseconds)
1112
extended_timeout = notifychangeproperty(
1113
dbus.UInt64, "ExtendedTimeout",
1114
type_func = timedelta_to_milliseconds)
1115
interval = notifychangeproperty(dbus.UInt64,
1116
"Interval",
1117
type_func =
1118
timedelta_to_milliseconds)
1119
checker_command = notifychangeproperty(dbus.String, "Checker")
1120
1121
del notifychangeproperty
1122
1123
def __del__(self, *args, **kwargs):
1124
try:
1125
self.remove_from_connection()
1126
except LookupError:
1127
pass
1128
if hasattr(DBusObjectWithProperties, "__del__"):
1129
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1130
Client.__del__(self, *args, **kwargs)
1131
1132
def checker_callback(self, pid, condition, command,
1133
*args, **kwargs):
1134
self.checker_callback_tag = None
1135
self.checker = None
1136
if os.WIFEXITED(condition):
1137
exitstatus = os.WEXITSTATUS(condition)
1138
# Emit D-Bus signal
1139
self.CheckerCompleted(dbus.Int16(exitstatus),
1140
dbus.Int64(condition),
1141
dbus.String(command))
1142
else:
1143
# Emit D-Bus signal
1144
self.CheckerCompleted(dbus.Int16(-1),
1145
dbus.Int64(condition),
1146
dbus.String(command))
1147
1148
return Client.checker_callback(self, pid, condition, command,
1149
*args, **kwargs)
1150
1151
def start_checker(self, *args, **kwargs):
1152
old_checker = self.checker
1153
if self.checker is not None:
1154
old_checker_pid = self.checker.pid
1155
else:
1156
old_checker_pid = None
1157
r = Client.start_checker(self, *args, **kwargs)
1158
# Only if new checker process was started
1159
if (self.checker is not None
1160
and old_checker_pid != self.checker.pid):
1161
# Emit D-Bus signal
1162
self.CheckerStarted(self.current_checker_command)
1163
return r
1164
1165
def _reset_approved(self):
1166
self.approved = None
1167
return False
1168
1169
def approve(self, value=True):
1170
self.send_changedstate()
1171
self.approved = value
1172
gobject.timeout_add(timedelta_to_milliseconds
1173
(self.approval_duration),
1174
self._reset_approved)
1175
1176
1177
## D-Bus methods, signals & properties
1178
_interface = "se.recompile.Mandos.Client"
1179
1180
## Signals
457
1181
458
1182
# CheckerCompleted - signal
459
1183
@dbus.service.signal(_interface, signature="nxs")
467
1191
"D-Bus signal"
468
1192
pass
469
1193
470
# GetAllProperties - method
471
@dbus.service.method(_interface, out_signature="a{sv}")
472
def GetAllProperties(self):
473
"D-Bus method"
474
return dbus.Dictionary({
475
dbus.String("name"):
476
dbus.String(self.name, variant_level=1),
477
dbus.String("fingerprint"):
478
dbus.String(self.fingerprint, variant_level=1),
479
dbus.String("host"):
480
dbus.String(self.host, variant_level=1),
481
dbus.String("created"):
482
_datetime_to_dbus(self.created, variant_level=1),
483
dbus.String("last_enabled"):
484
(_datetime_to_dbus(self.last_enabled,
485
variant_level=1)
486
if self.last_enabled is not None
487
else dbus.Boolean(False, variant_level=1)),
488
dbus.String("enabled"):
489
dbus.Boolean(self.enabled, variant_level=1),
490
dbus.String("last_checked_ok"):
491
(_datetime_to_dbus(self.last_checked_ok,
492
variant_level=1)
493
if self.last_checked_ok is not None
494
else dbus.Boolean (False, variant_level=1)),
495
dbus.String("timeout"):
496
dbus.UInt64(self.timeout_milliseconds(),
497
variant_level=1),
498
dbus.String("interval"):
499
dbus.UInt64(self.interval_milliseconds(),
500
variant_level=1),
501
dbus.String("checker"):
502
dbus.String(self.checker_command,
503
variant_level=1),
504
dbus.String("checker_running"):
505
dbus.Boolean(self.checker is not None,
506
variant_level=1),
507
dbus.String("object_path"):
508
dbus.ObjectPath(self.dbus_object_path,
509
variant_level=1)
510
}, signature="sv")
511
512
# IsStillValid - method
513
IsStillValid = (dbus.service.method(_interface, out_signature="b")
514
(still_valid))
515
IsStillValid.__name__ = "IsStillValid"
516
517
1194
# PropertyChanged - signal
518
1195
@dbus.service.signal(_interface, signature="sv")
519
1196
def PropertyChanged(self, property, value):
520
1197
"D-Bus signal"
521
1198
pass
522
1199
523
# SetChecker - method
524
@dbus.service.method(_interface, in_signature="s")
525
def SetChecker(self, checker):
526
"D-Bus setter method"
527
self.checker_command = checker
528
# Emit D-Bus signal
529
self.PropertyChanged(dbus.String(u"checker"),
530
dbus.String(self.checker_command,
531
variant_level=1))
532
533
# SetHost - method
534
@dbus.service.method(_interface, in_signature="s")
535
def SetHost(self, host):
536
"D-Bus setter method"
537
self.host = host
538
# Emit D-Bus signal
539
self.PropertyChanged(dbus.String(u"host"),
540
dbus.String(self.host, variant_level=1))
541
542
# SetInterval - method
543
@dbus.service.method(_interface, in_signature="t")
544
def SetInterval(self, milliseconds):
545
self.interval = datetime.timedelta(0, 0, 0, milliseconds)
546
# Emit D-Bus signal
547
self.PropertyChanged(dbus.String(u"interval"),
548
(dbus.UInt64(self.interval_milliseconds(),
549
variant_level=1)))
550
551
# SetSecret - method
552
@dbus.service.method(_interface, in_signature="ay",
553
byte_arrays=True)
554
def SetSecret(self, secret):
555
"D-Bus setter method"
556
self.secret = str(secret)
557
558
# SetTimeout - method
559
@dbus.service.method(_interface, in_signature="t")
560
def SetTimeout(self, milliseconds):
561
self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
562
# Emit D-Bus signal
563
self.PropertyChanged(dbus.String(u"timeout"),
564
(dbus.UInt64(self.timeout_milliseconds(),
565
variant_level=1)))
1200
# GotSecret - signal
1201
@dbus.service.signal(_interface)
1202
def GotSecret(self):
1203
"""D-Bus signal
1204
Is sent after a successful transfer of secret from the Mandos
1205
server to mandos-client
1206
"""
1207
pass
1208
1209
# Rejected - signal
1210
@dbus.service.signal(_interface, signature="s")
1211
def Rejected(self, reason):
1212
"D-Bus signal"
1213
pass
1214
1215
# NeedApproval - signal
1216
@dbus.service.signal(_interface, signature="tb")
1217
def NeedApproval(self, timeout, default):
1218
"D-Bus signal"
1219
return self.need_approval()
1220
1221
# NeRwequest - signal
1222
@dbus.service.signal(_interface, signature="s")
1223
def NewRequest(self, ip):
1224
"""D-Bus signal
1225
Is sent after a client request a password.
1226
"""
1227
pass
1228
1229
## Methods
1230
1231
# Approve - method
1232
@dbus.service.method(_interface, in_signature="b")
1233
def Approve(self, value):
1234
self.approve(value)
1235
1236
# CheckedOK - method
1237
@dbus.service.method(_interface)
1238
def CheckedOK(self):
1239
self.checked_ok()
566
1240
567
1241
# Enable - method
568
Enable = dbus.service.method(_interface)(enable)
569
Enable.__name__ = "Enable"
1242
@dbus.service.method(_interface)
1243
def Enable(self):
1244
"D-Bus method"
1245
self.enable()
570
1246
571
1247
# StartChecker - method
572
1248
@dbus.service.method(_interface)
581
1257
self.disable()
582
1258
583
1259
# StopChecker - method
584
StopChecker = dbus.service.method(_interface)(stop_checker)
585
StopChecker.__name__ = "StopChecker"
1260
@dbus.service.method(_interface)
1261
def StopChecker(self):
1262
self.stop_checker()
1263
1264
## Properties
1265
1266
# ApprovalPending - property
1267
@dbus_service_property(_interface, signature="b", access="read")
1268
def ApprovalPending_dbus_property(self):
1269
return dbus.Boolean(bool(self.approvals_pending))
1270
1271
# ApprovedByDefault - property
1272
@dbus_service_property(_interface, signature="b",
1273
access="readwrite")
1274
def ApprovedByDefault_dbus_property(self, value=None):
1275
if value is None: # get
1276
return dbus.Boolean(self.approved_by_default)
1277
self.approved_by_default = bool(value)
1278
1279
# ApprovalDelay - property
1280
@dbus_service_property(_interface, signature="t",
1281
access="readwrite")
1282
def ApprovalDelay_dbus_property(self, value=None):
1283
if value is None: # get
1284
return dbus.UInt64(self.approval_delay_milliseconds())
1285
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1286
1287
# ApprovalDuration - property
1288
@dbus_service_property(_interface, signature="t",
1289
access="readwrite")
1290
def ApprovalDuration_dbus_property(self, value=None):
1291
if value is None: # get
1292
return dbus.UInt64(timedelta_to_milliseconds(
1293
self.approval_duration))
1294
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1295
1296
# Name - property
1297
@dbus_service_property(_interface, signature="s", access="read")
1298
def Name_dbus_property(self):
1299
return dbus.String(self.name)
1300
1301
# Fingerprint - property
1302
@dbus_service_property(_interface, signature="s", access="read")
1303
def Fingerprint_dbus_property(self):
1304
return dbus.String(self.fingerprint)
1305
1306
# Host - property
1307
@dbus_service_property(_interface, signature="s",
1308
access="readwrite")
1309
def Host_dbus_property(self, value=None):
1310
if value is None: # get
1311
return dbus.String(self.host)
1312
self.host = unicode(value)
1313
1314
# Created - property
1315
@dbus_service_property(_interface, signature="s", access="read")
1316
def Created_dbus_property(self):
1317
return datetime_to_dbus(self.created)
1318
1319
# LastEnabled - property
1320
@dbus_service_property(_interface, signature="s", access="read")
1321
def LastEnabled_dbus_property(self):
1322
return datetime_to_dbus(self.last_enabled)
1323
1324
# Enabled - property
1325
@dbus_service_property(_interface, signature="b",
1326
access="readwrite")
1327
def Enabled_dbus_property(self, value=None):
1328
if value is None: # get
1329
return dbus.Boolean(self.enabled)
1330
if value:
1331
self.enable()
1332
else:
1333
self.disable()
1334
1335
# LastCheckedOK - property
1336
@dbus_service_property(_interface, signature="s",
1337
access="readwrite")
1338
def LastCheckedOK_dbus_property(self, value=None):
1339
if value is not None:
1340
self.checked_ok()
1341
return
1342
return datetime_to_dbus(self.last_checked_ok)
1343
1344
# Expires - property
1345
@dbus_service_property(_interface, signature="s", access="read")
1346
def Expires_dbus_property(self):
1347
return datetime_to_dbus(self.expires)
1348
1349
# LastApprovalRequest - property
1350
@dbus_service_property(_interface, signature="s", access="read")
1351
def LastApprovalRequest_dbus_property(self):
1352
return datetime_to_dbus(self.last_approval_request)
1353
1354
# Timeout - property
1355
@dbus_service_property(_interface, signature="t",
1356
access="readwrite")
1357
def Timeout_dbus_property(self, value=None):
1358
if value is None: # get
1359
return dbus.UInt64(self.timeout_milliseconds())
1360
self.timeout = datetime.timedelta(0, 0, 0, value)
1361
if getattr(self, "disable_initiator_tag", None) is None:
1362
return
1363
# Reschedule timeout
1364
gobject.source_remove(self.disable_initiator_tag)
1365
self.disable_initiator_tag = None
1366
self.expires = None
1367
time_to_die = timedelta_to_milliseconds((self
1368
.last_checked_ok
1369
+ self.timeout)
1370
- datetime.datetime
1371
.utcnow())
1372
if time_to_die <= 0:
1373
# The timeout has passed
1374
self.disable()
1375
else:
1376
self.expires = (datetime.datetime.utcnow()
1377
+ datetime.timedelta(milliseconds =
1378
time_to_die))
1379
self.disable_initiator_tag = (gobject.timeout_add
1380
(time_to_die, self.disable))
1381
1382
# ExtendedTimeout - property
1383
@dbus_service_property(_interface, signature="t",
1384
access="readwrite")
1385
def ExtendedTimeout_dbus_property(self, value=None):
1386
if value is None: # get
1387
return dbus.UInt64(self.extended_timeout_milliseconds())
1388
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1389
1390
# Interval - property
1391
@dbus_service_property(_interface, signature="t",
1392
access="readwrite")
1393
def Interval_dbus_property(self, value=None):
1394
if value is None: # get
1395
return dbus.UInt64(self.interval_milliseconds())
1396
self.interval = datetime.timedelta(0, 0, 0, value)
1397
if getattr(self, "checker_initiator_tag", None) is None:
1398
return
1399
if self.enabled:
1400
# Reschedule checker run
1401
gobject.source_remove(self.checker_initiator_tag)
1402
self.checker_initiator_tag = (gobject.timeout_add
1403
(value, self.start_checker))
1404
self.start_checker() # Start one now, too
1405
1406
# Checker - property
1407
@dbus_service_property(_interface, signature="s",
1408
access="readwrite")
1409
def Checker_dbus_property(self, value=None):
1410
if value is None: # get
1411
return dbus.String(self.checker_command)
1412
self.checker_command = unicode(value)
1413
1414
# CheckerRunning - property
1415
@dbus_service_property(_interface, signature="b",
1416
access="readwrite")
1417
def CheckerRunning_dbus_property(self, value=None):
1418
if value is None: # get
1419
return dbus.Boolean(self.checker is not None)
1420
if value:
1421
self.start_checker()
1422
else:
1423
self.stop_checker()
1424
1425
# ObjectPath - property
1426
@dbus_service_property(_interface, signature="o", access="read")
1427
def ObjectPath_dbus_property(self):
1428
return self.dbus_object_path # is already a dbus.ObjectPath
1429
1430
# Secret = property
1431
@dbus_service_property(_interface, signature="ay",
1432
access="write", byte_arrays=True)
1433
def Secret_dbus_property(self, value):
1434
self.secret = str(value)
586
1435
587
1436
del _interface
588
1437
589
1438
590
def peer_certificate(session):
591
"Return the peer's OpenPGP certificate as a bytestring"
592
# If not an OpenPGP certificate...
593
if (gnutls.library.functions
594
.gnutls_certificate_type_get(session._c_object)
595
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
596
# ...do the normal thing
597
return session.peer_certificate
598
list_size = ctypes.c_uint(1)
599
cert_list = (gnutls.library.functions
600
.gnutls_certificate_get_peers
601
(session._c_object, ctypes.byref(list_size)))
602
if not bool(cert_list) and list_size.value != 0:
603
raise gnutls.errors.GNUTLSError("error getting peer"
604
" certificate")
605
if list_size.value == 0:
606
return None
607
cert = cert_list[0]
608
return ctypes.string_at(cert.data, cert.size)
609
610
611
def fingerprint(openpgp):
612
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
613
# New GnuTLS "datum" with the OpenPGP public key
614
datum = (gnutls.library.types
615
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
616
ctypes.POINTER
617
(ctypes.c_ubyte)),
618
ctypes.c_uint(len(openpgp))))
619
# New empty GnuTLS certificate
620
crt = gnutls.library.types.gnutls_openpgp_crt_t()
621
(gnutls.library.functions
622
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
623
# Import the OpenPGP public key into the certificate
624
(gnutls.library.functions
625
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
626
gnutls.library.constants
627
.GNUTLS_OPENPGP_FMT_RAW))
628
# Verify the self signature in the key
629
crtverify = ctypes.c_uint()
630
(gnutls.library.functions
631
.gnutls_openpgp_crt_verify_self(crt, 0, ctypes.byref(crtverify)))
632
if crtverify.value != 0:
633
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
634
raise gnutls.errors.CertificateSecurityError("Verify failed")
635
# New buffer for the fingerprint
636
buf = ctypes.create_string_buffer(20)
637
buf_len = ctypes.c_size_t()
638
# Get the fingerprint from the certificate into the buffer
639
(gnutls.library.functions
640
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
641
ctypes.byref(buf_len)))
642
# Deinit the certificate
643
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
644
# Convert the buffer to a Python bytestring
645
fpr = ctypes.string_at(buf, buf_len.value)
646
# Convert the bytestring to hexadecimal notation
647
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
648
return hex_fpr
649
650
651
class TCP_handler(SocketServer.BaseRequestHandler, object):
652
"""A TCP request handler class.
653
Instantiated by IPv6_TCPServer for each request to handle it.
1439
class ProxyClient(object):
1440
def __init__(self, child_pipe, fpr, address):
1441
self._pipe = child_pipe
1442
self._pipe.send(('init', fpr, address))
1443
if not self._pipe.recv():
1444
raise KeyError()
1445
1446
def __getattribute__(self, name):
1447
if name == '_pipe':
1448
return super(ProxyClient, self).__getattribute__(name)
1449
self._pipe.send(('getattr', name))
1450
data = self._pipe.recv()
1451
if data[0] == 'data':
1452
return data[1]
1453
if data[0] == 'function':
1454
def func(*args, **kwargs):
1455
self._pipe.send(('funcall', name, args, kwargs))
1456
return self._pipe.recv()[1]
1457
return func
1458
1459
def __setattr__(self, name, value):
1460
if name == '_pipe':
1461
return super(ProxyClient, self).__setattr__(name, value)
1462
self._pipe.send(('setattr', name, value))
1463
1464
1465
class ClientDBusTransitional(ClientDBus):
1466
__metaclass__ = AlternateDBusNamesMetaclass
1467
1468
1469
class ClientHandler(socketserver.BaseRequestHandler, object):
1470
"""A class to handle client connections.
1471
1472
Instantiated once for each connection to handle it.
654
1473
Note: This will run in its own forked process."""
655
1474
656
1475
def handle(self):
657
logger.info(u"TCP connection from: %s",
658
unicode(self.client_address))
659
session = (gnutls.connection
660
.ClientSession(self.request,
661
gnutls.connection
662
.X509Credentials()))
663
664
line = self.request.makefile().readline()
665
logger.debug(u"Protocol version: %r", line)
666
try:
667
if int(line.strip().split()[0]) > 1:
668
raise RuntimeError
669
except (ValueError, IndexError, RuntimeError), error:
670
logger.error(u"Unknown protocol version: %s", error)
671
return
672
673
# Note: gnutls.connection.X509Credentials is really a generic
674
# GnuTLS certificate credentials object so long as no X.509
675
# keys are added to it. Therefore, we can use it here despite
676
# using OpenPGP certificates.
677
678
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
679
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
680
# "+DHE-DSS"))
681
# Use a fallback default, since this MUST be set.
682
priority = self.server.settings.get("priority", "NORMAL")
683
(gnutls.library.functions
684
.gnutls_priority_set_direct(session._c_object,
685
priority, None))
686
687
try:
688
session.handshake()
689
except gnutls.errors.GNUTLSError, error:
690
logger.warning(u"Handshake failed: %s", error)
691
# Do not run session.bye() here: the session is not
692
# established. Just abandon the request.
693
return
694
logger.debug(u"Handshake succeeded")
695
try:
696
fpr = fingerprint(peer_certificate(session))
697
except (TypeError, gnutls.errors.GNUTLSError), error:
698
logger.warning(u"Bad certificate: %s", error)
699
session.bye()
700
return
701
logger.debug(u"Fingerprint: %s", fpr)
702
703
for c in self.server.clients:
704
if c.fingerprint == fpr:
705
client = c
706
break
707
else:
708
logger.warning(u"Client not found for fingerprint: %s",
709
fpr)
710
session.bye()
711
return
712
# Have to check if client.still_valid(), since it is possible
713
# that the client timed out while establishing the GnuTLS
714
# session.
715
if not client.still_valid():
716
logger.warning(u"Client %(name)s is invalid",
717
vars(client))
718
session.bye()
719
return
720
## This won't work here, since we're in a fork.
721
# client.checked_ok()
722
sent_size = 0
723
while sent_size < len(client.secret):
724
sent = session.send(client.secret[sent_size:])
725
logger.debug(u"Sent: %d, remaining: %d",
726
sent, len(client.secret)
727
- (sent_size + sent))
728
sent_size += sent
729
session.bye()
730
731
732
class IPv6_TCPServer(SocketServer.ForkingMixIn,
733
SocketServer.TCPServer, object):
734
"""IPv6 TCP server. Accepts 'None' as address and/or port.
1476
with contextlib.closing(self.server.child_pipe) as child_pipe:
1477
logger.info("TCP connection from: %s",
1478
unicode(self.client_address))
1479
logger.debug("Pipe FD: %d",
1480
self.server.child_pipe.fileno())
1481
1482
session = (gnutls.connection
1483
.ClientSession(self.request,
1484
gnutls.connection
1485
.X509Credentials()))
1486
1487
# Note: gnutls.connection.X509Credentials is really a
1488
# generic GnuTLS certificate credentials object so long as
1489
# no X.509 keys are added to it. Therefore, we can use it
1490
# here despite using OpenPGP certificates.
1491
1492
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1493
# "+AES-256-CBC", "+SHA1",
1494
# "+COMP-NULL", "+CTYPE-OPENPGP",
1495
# "+DHE-DSS"))
1496
# Use a fallback default, since this MUST be set.
1497
priority = self.server.gnutls_priority
1498
if priority is None:
1499
priority = "NORMAL"
1500
(gnutls.library.functions
1501
.gnutls_priority_set_direct(session._c_object,
1502
priority, None))
1503
1504
# Start communication using the Mandos protocol
1505
# Get protocol number
1506
line = self.request.makefile().readline()
1507
logger.debug("Protocol version: %r", line)
1508
try:
1509
if int(line.strip().split()[0]) > 1:
1510
raise RuntimeError
1511
except (ValueError, IndexError, RuntimeError) as error:
1512
logger.error("Unknown protocol version: %s", error)
1513
return
1514
1515
# Start GnuTLS connection
1516
try:
1517
session.handshake()
1518
except gnutls.errors.GNUTLSError as error:
1519
logger.warning("Handshake failed: %s", error)
1520
# Do not run session.bye() here: the session is not
1521
# established. Just abandon the request.
1522
return
1523
logger.debug("Handshake succeeded")
1524
1525
approval_required = False
1526
try:
1527
try:
1528
fpr = self.fingerprint(self.peer_certificate
1529
(session))
1530
except (TypeError,
1531
gnutls.errors.GNUTLSError) as error:
1532
logger.warning("Bad certificate: %s", error)
1533
return
1534
logger.debug("Fingerprint: %s", fpr)
1535
1536
try:
1537
client = ProxyClient(child_pipe, fpr,
1538
self.client_address)
1539
except KeyError:
1540
return
1541
1542
if self.server.use_dbus:
1543
# Emit D-Bus signal
1544
client.NewRequest(str(self.client_address))
1545
1546
if client.approval_delay:
1547
delay = client.approval_delay
1548
client.approvals_pending += 1
1549
approval_required = True
1550
1551
while True:
1552
if not client.enabled:
1553
logger.info("Client %s is disabled",
1554
client.name)
1555
if self.server.use_dbus:
1556
# Emit D-Bus signal
1557
client.Rejected("Disabled")
1558
return
1559
1560
if client.approved or not client.approval_delay:
1561
#We are approved or approval is disabled
1562
break
1563
elif client.approved is None:
1564
logger.info("Client %s needs approval",
1565
client.name)
1566
if self.server.use_dbus:
1567
# Emit D-Bus signal
1568
client.NeedApproval(
1569
client.approval_delay_milliseconds(),
1570
client.approved_by_default)
1571
else:
1572
logger.warning("Client %s was not approved",
1573
client.name)
1574
if self.server.use_dbus:
1575
# Emit D-Bus signal
1576
client.Rejected("Denied")
1577
return
1578
1579
#wait until timeout or approved
1580
time = datetime.datetime.now()
1581
client.changedstate.acquire()
1582
(client.changedstate.wait
1583
(float(client.timedelta_to_milliseconds(delay)
1584
/ 1000)))
1585
client.changedstate.release()
1586
time2 = datetime.datetime.now()
1587
if (time2 - time) >= delay:
1588
if not client.approved_by_default:
1589
logger.warning("Client %s timed out while"
1590
" waiting for approval",
1591
client.name)
1592
if self.server.use_dbus:
1593
# Emit D-Bus signal
1594
client.Rejected("Approval timed out")
1595
return
1596
else:
1597
break
1598
else:
1599
delay -= time2 - time
1600
1601
sent_size = 0
1602
while sent_size < len(client.secret):
1603
try:
1604
sent = session.send(client.secret[sent_size:])
1605
except gnutls.errors.GNUTLSError as error:
1606
logger.warning("gnutls send failed")
1607
return
1608
logger.debug("Sent: %d, remaining: %d",
1609
sent, len(client.secret)
1610
- (sent_size + sent))
1611
sent_size += sent
1612
1613
logger.info("Sending secret to %s", client.name)
1614
# bump the timeout using extended_timeout
1615
client.checked_ok(client.extended_timeout)
1616
if self.server.use_dbus:
1617
# Emit D-Bus signal
1618
client.GotSecret()
1619
1620
finally:
1621
if approval_required:
1622
client.approvals_pending -= 1
1623
try:
1624
session.bye()
1625
except gnutls.errors.GNUTLSError as error:
1626
logger.warning("GnuTLS bye failed")
1627
1628
@staticmethod
1629
def peer_certificate(session):
1630
"Return the peer's OpenPGP certificate as a bytestring"
1631
# If not an OpenPGP certificate...
1632
if (gnutls.library.functions
1633
.gnutls_certificate_type_get(session._c_object)
1634
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1635
# ...do the normal thing
1636
return session.peer_certificate
1637
list_size = ctypes.c_uint(1)
1638
cert_list = (gnutls.library.functions
1639
.gnutls_certificate_get_peers
1640
(session._c_object, ctypes.byref(list_size)))
1641
if not bool(cert_list) and list_size.value != 0:
1642
raise gnutls.errors.GNUTLSError("error getting peer"
1643
" certificate")
1644
if list_size.value == 0:
1645
return None
1646
cert = cert_list[0]
1647
return ctypes.string_at(cert.data, cert.size)
1648
1649
@staticmethod
1650
def fingerprint(openpgp):
1651
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1652
# New GnuTLS "datum" with the OpenPGP public key
1653
datum = (gnutls.library.types
1654
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1655
ctypes.POINTER
1656
(ctypes.c_ubyte)),
1657
ctypes.c_uint(len(openpgp))))
1658
# New empty GnuTLS certificate
1659
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1660
(gnutls.library.functions
1661
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1662
# Import the OpenPGP public key into the certificate
1663
(gnutls.library.functions
1664
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1665
gnutls.library.constants
1666
.GNUTLS_OPENPGP_FMT_RAW))
1667
# Verify the self signature in the key
1668
crtverify = ctypes.c_uint()
1669
(gnutls.library.functions
1670
.gnutls_openpgp_crt_verify_self(crt, 0,
1671
ctypes.byref(crtverify)))
1672
if crtverify.value != 0:
1673
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1674
raise (gnutls.errors.CertificateSecurityError
1675
("Verify failed"))
1676
# New buffer for the fingerprint
1677
buf = ctypes.create_string_buffer(20)
1678
buf_len = ctypes.c_size_t()
1679
# Get the fingerprint from the certificate into the buffer
1680
(gnutls.library.functions
1681
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1682
ctypes.byref(buf_len)))
1683
# Deinit the certificate
1684
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1685
# Convert the buffer to a Python bytestring
1686
fpr = ctypes.string_at(buf, buf_len.value)
1687
# Convert the bytestring to hexadecimal notation
1688
hex_fpr = binascii.hexlify(fpr).upper()
1689
return hex_fpr
1690
1691
1692
class MultiprocessingMixIn(object):
1693
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1694
def sub_process_main(self, request, address):
1695
try:
1696
self.finish_request(request, address)
1697
except Exception:
1698
self.handle_error(request, address)
1699
self.close_request(request)
1700
1701
def process_request(self, request, address):
1702
"""Start a new process to process the request."""
1703
proc = multiprocessing.Process(target = self.sub_process_main,
1704
args = (request,
1705
address))
1706
proc.start()
1707
return proc
1708
1709
1710
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1711
""" adds a pipe to the MixIn """
1712
def process_request(self, request, client_address):
1713
"""Overrides and wraps the original process_request().
1714
1715
This function creates a new pipe in self.pipe
1716
"""
1717
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1718
1719
proc = MultiprocessingMixIn.process_request(self, request,
1720
client_address)
1721
self.child_pipe.close()
1722
self.add_pipe(parent_pipe, proc)
1723
1724
def add_pipe(self, parent_pipe, proc):
1725
"""Dummy function; override as necessary"""
1726
raise NotImplementedError
1727
1728
1729
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1730
socketserver.TCPServer, object):
1731
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1732
735
1733
Attributes:
736
settings: Server settings
737
clients: Set() of Client objects
738
1734
enabled: Boolean; whether this server is activated yet
1735
interface: None or a network interface name (string)
1736
use_ipv6: Boolean; to use IPv6 or not
739
1737
"""
740
address_family = socket.AF_INET6
741
def __init__(self, *args, **kwargs):
742
if "settings" in kwargs:
743
self.settings = kwargs["settings"]
744
del kwargs["settings"]
745
if "clients" in kwargs:
746
self.clients = kwargs["clients"]
747
del kwargs["clients"]
748
self.enabled = False
749
super(IPv6_TCPServer, self).__init__(*args, **kwargs)
1738
def __init__(self, server_address, RequestHandlerClass,
1739
interface=None, use_ipv6=True):
1740
self.interface = interface
1741
if use_ipv6:
1742
self.address_family = socket.AF_INET6
1743
socketserver.TCPServer.__init__(self, server_address,
1744
RequestHandlerClass)
750
1745
def server_bind(self):
751
1746
"""This overrides the normal server_bind() function
752
1747
to bind to an interface if one was specified, and also NOT to
753
1748
bind to an address or port if they were not specified."""
754
if self.settings["interface"]:
755
# 25 is from /usr/include/asm-i486/socket.h
756
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
757
try:
758
self.socket.setsockopt(socket.SOL_SOCKET,
759
SO_BINDTODEVICE,
760
self.settings["interface"])
761
except socket.error, error:
762
if error[0] == errno.EPERM:
763
logger.error(u"No permission to"
764
u" bind to interface %s",
765
self.settings["interface"])
766
else:
767
raise error
1749
if self.interface is not None:
1750
if SO_BINDTODEVICE is None:
1751
logger.error("SO_BINDTODEVICE does not exist;"
1752
" cannot bind to interface %s",
1753
self.interface)
1754
else:
1755
try:
1756
self.socket.setsockopt(socket.SOL_SOCKET,
1757
SO_BINDTODEVICE,
1758
str(self.interface
1759
+ '\0'))
1760
except socket.error as error:
1761
if error[0] == errno.EPERM:
1762
logger.error("No permission to"
1763
" bind to interface %s",
1764
self.interface)
1765
elif error[0] == errno.ENOPROTOOPT:
1766
logger.error("SO_BINDTODEVICE not available;"
1767
" cannot bind to interface %s",
1768
self.interface)
1769
else:
1770
raise
768
1771
# Only bind(2) the socket if we really need to.
769
1772
if self.server_address[0] or self.server_address[1]:
770
1773
if not self.server_address[0]:
771
in6addr_any = "::"
772
self.server_address = (in6addr_any,
1774
if self.address_family == socket.AF_INET6:
1775
any_address = "::" # in6addr_any
1776
else:
1777
any_address = socket.INADDR_ANY
1778
self.server_address = (any_address,
773
1779
self.server_address[1])
774
1780
elif not self.server_address[1]:
775
1781
self.server_address = (self.server_address[0],
776
1782
0)
777
# if self.settings["interface"]:
1783
# if self.interface:
778
1784
# self.server_address = (self.server_address[0],
779
1785
# 0, # port
780
1786
# 0, # flowinfo
781
1787
# if_nametoindex
782
# (self.settings
783
# ["interface"]))
784
return super(IPv6_TCPServer, self).server_bind()
1788
# (self.interface))
1789
return socketserver.TCPServer.server_bind(self)
1790
1791
1792
class MandosServer(IPv6_TCPServer):
1793
"""Mandos server.
1794
1795
Attributes:
1796
clients: set of Client objects
1797
gnutls_priority GnuTLS priority string
1798
use_dbus: Boolean; to emit D-Bus signals or not
1799
1800
Assumes a gobject.MainLoop event loop.
1801
"""
1802
def __init__(self, server_address, RequestHandlerClass,
1803
interface=None, use_ipv6=True, clients=None,
1804
gnutls_priority=None, use_dbus=True):
1805
self.enabled = False
1806
self.clients = clients
1807
if self.clients is None:
1808
self.clients = {}
1809
self.use_dbus = use_dbus
1810
self.gnutls_priority = gnutls_priority
1811
IPv6_TCPServer.__init__(self, server_address,
1812
RequestHandlerClass,
1813
interface = interface,
1814
use_ipv6 = use_ipv6)
785
1815
def server_activate(self):
786
1816
if self.enabled:
787
return super(IPv6_TCPServer, self).server_activate()
1817
return socketserver.TCPServer.server_activate(self)
1818
788
1819
def enable(self):
789
1820
self.enabled = True
1821
1822
def add_pipe(self, parent_pipe, proc):
1823
# Call "handle_ipc" for both data and EOF events
1824
gobject.io_add_watch(parent_pipe.fileno(),
1825
gobject.IO_IN | gobject.IO_HUP,
1826
functools.partial(self.handle_ipc,
1827
parent_pipe =
1828
parent_pipe,
1829
proc = proc))
1830
1831
def handle_ipc(self, source, condition, parent_pipe=None,
1832
proc = None, client_object=None):
1833
condition_names = {
1834
gobject.IO_IN: "IN", # There is data to read.
1835
gobject.IO_OUT: "OUT", # Data can be written (without
1836
# blocking).
1837
gobject.IO_PRI: "PRI", # There is urgent data to read.
1838
gobject.IO_ERR: "ERR", # Error condition.
1839
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1840
# broken, usually for pipes and
1841
# sockets).
1842
}
1843
conditions_string = ' | '.join(name
1844
for cond, name in
1845
condition_names.iteritems()
1846
if cond & condition)
1847
# error, or the other end of multiprocessing.Pipe has closed
1848
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
1849
# Wait for other process to exit
1850
proc.join()
1851
return False
1852
1853
# Read a request from the child
1854
request = parent_pipe.recv()
1855
command = request[0]
1856
1857
if command == 'init':
1858
fpr = request[1]
1859
address = request[2]
1860
1861
for c in self.clients.itervalues():
1862
if c.fingerprint == fpr:
1863
client = c
1864
break
1865
else:
1866
logger.info("Client not found for fingerprint: %s, ad"
1867
"dress: %s", fpr, address)
1868
if self.use_dbus:
1869
# Emit D-Bus signal
1870
mandos_dbus_service.ClientNotFound(fpr,
1871
address[0])
1872
parent_pipe.send(False)
1873
return False
1874
1875
gobject.io_add_watch(parent_pipe.fileno(),
1876
gobject.IO_IN | gobject.IO_HUP,
1877
functools.partial(self.handle_ipc,
1878
parent_pipe =
1879
parent_pipe,
1880
proc = proc,
1881
client_object =
1882
client))
1883
parent_pipe.send(True)
1884
# remove the old hook in favor of the new above hook on
1885
# same fileno
1886
return False
1887
if command == 'funcall':
1888
funcname = request[1]
1889
args = request[2]
1890
kwargs = request[3]
1891
1892
parent_pipe.send(('data', getattr(client_object,
1893
funcname)(*args,
1894
**kwargs)))
1895
1896
if command == 'getattr':
1897
attrname = request[1]
1898
if callable(client_object.__getattribute__(attrname)):
1899
parent_pipe.send(('function',))
1900
else:
1901
parent_pipe.send(('data', client_object
1902
.__getattribute__(attrname)))
1903
1904
if command == 'setattr':
1905
attrname = request[1]
1906
value = request[2]
1907
setattr(client_object, attrname, value)
1908
1909
return True
790
1910
791
1911
792
1912
def string_to_delta(interval):
800
1920
datetime.timedelta(0, 3600)
801
1921
>>> string_to_delta('24h')
802
1922
datetime.timedelta(1)
803
>>> string_to_delta(u'1w')
1923
>>> string_to_delta('1w')
804
1924
datetime.timedelta(7)
805
1925
>>> string_to_delta('5m 30s')
806
1926
datetime.timedelta(0, 330)
810
1930
try:
811
1931
suffix = unicode(s[-1])
812
1932
value = int(s[:-1])
813
if suffix == u"d":
1933
if suffix == "d":
814
1934
delta = datetime.timedelta(value)
815
elif suffix == u"s":
1935
elif suffix == "s":
816
1936
delta = datetime.timedelta(0, value)
817
elif suffix == u"m":
1937
elif suffix == "m":
818
1938
delta = datetime.timedelta(0, 0, 0, 0, value)
819
elif suffix == u"h":
1939
elif suffix == "h":
820
1940
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
821
elif suffix == u"w":
1941
elif suffix == "w":
822
1942
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
823
1943
else:
824
raise ValueError
825
except (ValueError, IndexError):
826
raise ValueError
1944
raise ValueError("Unknown suffix %r" % suffix)
1945
except (ValueError, IndexError) as e:
1946
raise ValueError(*(e.args))
827
1947
timevalue += delta
828
1948
return timevalue
829
1949
830
1950
831
def server_state_changed(state):
832
"""Derived from the Avahi example code"""
833
if state == avahi.SERVER_COLLISION:
834
logger.error(u"Zeroconf server name collision")
835
service.remove()
836
elif state == avahi.SERVER_RUNNING:
837
service.add()
838
839
840
def entry_group_state_changed(state, error):
841
"""Derived from the Avahi example code"""
842
logger.debug(u"Avahi state change: %i", state)
843
844
if state == avahi.ENTRY_GROUP_ESTABLISHED:
845
logger.debug(u"Zeroconf service established.")
846
elif state == avahi.ENTRY_GROUP_COLLISION:
847
logger.warning(u"Zeroconf service name collision.")
848
service.rename()
849
elif state == avahi.ENTRY_GROUP_FAILURE:
850
logger.critical(u"Avahi: Error in group state changed %s",
851
unicode(error))
852
raise AvahiGroupError(u"State changed: %s" % unicode(error))
853
854
def if_nametoindex(interface):
855
"""Call the C function if_nametoindex(), or equivalent"""
856
global if_nametoindex
857
try:
858
if_nametoindex = (ctypes.cdll.LoadLibrary
859
(ctypes.util.find_library("c"))
860
.if_nametoindex)
861
except (OSError, AttributeError):
862
if "struct" not in sys.modules:
863
import struct
864
if "fcntl" not in sys.modules:
865
import fcntl
866
def if_nametoindex(interface):
867
"Get an interface index the hard way, i.e. using fcntl()"
868
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
869
with closing(socket.socket()) as s:
870
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
871
struct.pack("16s16x", interface))
872
interface_index = struct.unpack("I", ifreq[16:20])[0]
873
return interface_index
874
return if_nametoindex(interface)
875
876
877
1951
def daemon(nochdir = False, noclose = False):
878
1952
"""See daemon(3). Standard BSD Unix function.
1953
879
1954
This should really exist as os.daemon, but it doesn't (yet)."""
880
1955
if os.fork():
881
1956
sys.exit()
889
1964
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
890
1965
if not stat.S_ISCHR(os.fstat(null).st_mode):
891
1966
raise OSError(errno.ENODEV,
892
"/dev/null not a character device")
1967
"%s not a character device"
1968
% os.path.devnull)
893
1969
os.dup2(null, sys.stdin.fileno())
894
1970
os.dup2(null, sys.stdout.fileno())
895
1971
os.dup2(null, sys.stderr.fileno())
898
1974
899
1975
900
1976
def main():
901
parser = optparse.OptionParser(version = "%%prog %s" % version)
902
parser.add_option("-i", "--interface", type="string",
903
metavar="IF", help="Bind to interface IF")
904
parser.add_option("-a", "--address", type="string",
905
help="Address to listen for requests on")
906
parser.add_option("-p", "--port", type="int",
907
help="Port number to receive requests on")
908
parser.add_option("--check", action="store_true",
909
help="Run self-test")
910
parser.add_option("--debug", action="store_true",
911
help="Debug mode; run in foreground and log to"
912
" terminal")
913
parser.add_option("--priority", type="string", help="GnuTLS"
914
" priority string (see GnuTLS documentation)")
915
parser.add_option("--servicename", type="string", metavar="NAME",
916
help="Zeroconf service name")
917
parser.add_option("--configdir", type="string",
918
default="/etc/mandos", metavar="DIR",
919
help="Directory to search for configuration"
920
" files")
921
parser.add_option("--no-dbus", action="store_false",
922
dest="use_dbus",
923
help="Do not provide D-Bus system bus"
924
" interface")
925
options = parser.parse_args()[0]
1977
1978
##################################################################
1979
# Parsing of options, both command line and config file
1980
1981
parser = argparse.ArgumentParser()
1982
parser.add_argument("-v", "--version", action="version",
1983
version = "%%(prog)s %s" % version,
1984
help="show version number and exit")
1985
parser.add_argument("-i", "--interface", metavar="IF",
1986
help="Bind to interface IF")
1987
parser.add_argument("-a", "--address",
1988
help="Address to listen for requests on")
1989
parser.add_argument("-p", "--port", type=int,
1990
help="Port number to receive requests on")
1991
parser.add_argument("--check", action="store_true",
1992
help="Run self-test")
1993
parser.add_argument("--debug", action="store_true",
1994
help="Debug mode; run in foreground and log"
1995
" to terminal")
1996
parser.add_argument("--debuglevel", metavar="LEVEL",
1997
help="Debug level for stdout output")
1998
parser.add_argument("--priority", help="GnuTLS"
1999
" priority string (see GnuTLS documentation)")
2000
parser.add_argument("--servicename",
2001
metavar="NAME", help="Zeroconf service name")
2002
parser.add_argument("--configdir",
2003
default="/etc/mandos", metavar="DIR",
2004
help="Directory to search for configuration"
2005
" files")
2006
parser.add_argument("--no-dbus", action="store_false",
2007
dest="use_dbus", help="Do not provide D-Bus"
2008
" system bus interface")
2009
parser.add_argument("--no-ipv6", action="store_false",
2010
dest="use_ipv6", help="Do not use IPv6")
2011
parser.add_argument("--no-restore", action="store_false",
2012
dest="restore", help="Do not restore stored"
2013
" state")
2014
parser.add_argument("--statedir", metavar="DIR",
2015
help="Directory to save/restore state in")
2016
2017
options = parser.parse_args()
926
2018
927
2019
if options.check:
928
2020
import doctest
938
2030
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
939
2031
"servicename": "Mandos",
940
2032
"use_dbus": "True",
2033
"use_ipv6": "True",
2034
"debuglevel": "",
2035
"restore": "True",
2036
"statedir": "/var/lib/mandos"
941
2037
}
942
2038
943
2039
# Parse config file for server-global settings
944
server_config = ConfigParser.SafeConfigParser(server_defaults)
2040
server_config = configparser.SafeConfigParser(server_defaults)
945
2041
del server_defaults
946
server_config.read(os.path.join(options.configdir, "mandos.conf"))
2042
server_config.read(os.path.join(options.configdir,
2043
"mandos.conf"))
947
2044
# Convert the SafeConfigParser object to a dict
948
2045
server_settings = server_config.defaults()
949
2046
# Use the appropriate methods on the non-string config options
950
server_settings["debug"] = server_config.getboolean("DEFAULT",
951
"debug")
952
server_settings["use_dbus"] = server_config.getboolean("DEFAULT",
953
"use_dbus")
2047
for option in ("debug", "use_dbus", "use_ipv6"):
2048
server_settings[option] = server_config.getboolean("DEFAULT",
2049
option)
954
2050
if server_settings["port"]:
955
2051
server_settings["port"] = server_config.getint("DEFAULT",
956
2052
"port")
960
2056
# options, if set.
961
2057
for option in ("interface", "address", "port", "debug",
962
2058
"priority", "servicename", "configdir",
963
"use_dbus"):
2059
"use_dbus", "use_ipv6", "debuglevel", "restore",
2060
"statedir"):
964
2061
value = getattr(options, option)
965
2062
if value is not None:
966
2063
server_settings[option] = value
967
2064
del options
2065
# Force all strings to be unicode
2066
for option in server_settings.keys():
2067
if type(server_settings[option]) is str:
2068
server_settings[option] = unicode(server_settings[option])
968
2069
# Now we have our good server settings in "server_settings"
969
2070
2071
##################################################################
2072
970
2073
# For convenience
971
2074
debug = server_settings["debug"]
2075
debuglevel = server_settings["debuglevel"]
972
2076
use_dbus = server_settings["use_dbus"]
973
974
def sigsegvhandler(signum, frame):
975
raise RuntimeError('Segmentation fault')
2077
use_ipv6 = server_settings["use_ipv6"]
2078
stored_state_path = os.path.join(server_settings["statedir"],
2079
stored_state_file)
976
2080
977
if not debug:
978
syslogger.setLevel(logging.WARNING)
979
console.setLevel(logging.WARNING)
2081
if debug:
2082
initlogger(debug, logging.DEBUG)
980
2083
else:
981
signal.signal(signal.SIGSEGV, sigsegvhandler)
2084
if not debuglevel:
2085
initlogger(debug)
2086
else:
2087
level = getattr(logging, debuglevel.upper())
2088
initlogger(debug, level)
982
2089
983
2090
if server_settings["servicename"] != "Mandos":
984
2091
syslogger.setFormatter(logging.Formatter
985
('Mandos (%s): %%(levelname)s:'
986
' %%(message)s'
2092
('Mandos (%s) [%%(process)d]:'
2093
' %%(levelname)s: %%(message)s'
987
2094
% server_settings["servicename"]))
988
2095
989
2096
# Parse config file with clients
990
client_defaults = { "timeout": "1h",
991
"interval": "5m",
992
"checker": "fping -q -- %%(host)s",
993
"host": "",
994
}
995
client_config = ConfigParser.SafeConfigParser(client_defaults)
2097
client_config = configparser.SafeConfigParser(Client.client_defaults)
996
2098
client_config.read(os.path.join(server_settings["configdir"],
997
2099
"clients.conf"))
998
2100
999
clients = Set()
1000
tcp_server = IPv6_TCPServer((server_settings["address"],
1001
server_settings["port"]),
1002
TCP_handler,
1003
settings=server_settings,
1004
clients=clients)
1005
pidfilename = "/var/run/mandos.pid"
1006
try:
1007
pidfile = open(pidfilename, "w")
1008
except IOError, error:
1009
logger.error("Could not open file %r", pidfilename)
2101
global mandos_dbus_service
2102
mandos_dbus_service = None
2103
2104
tcp_server = MandosServer((server_settings["address"],
2105
server_settings["port"]),
2106
ClientHandler,
2107
interface=(server_settings["interface"]
2108
or None),
2109
use_ipv6=use_ipv6,
2110
gnutls_priority=
2111
server_settings["priority"],
2112
use_dbus=use_dbus)
2113
if not debug:
2114
pidfilename = "/var/run/mandos.pid"
2115
try:
2116
pidfile = open(pidfilename, "w")
2117
except IOError:
2118
logger.error("Could not open file %r", pidfilename)
1010
2119
1011
2120
try:
1012
2121
uid = pwd.getpwnam("_mandos").pw_uid
1018
2127
except KeyError:
1019
2128
try:
1020
2129
uid = pwd.getpwnam("nobody").pw_uid
1021
gid = pwd.getpwnam("nogroup").pw_gid
2130
gid = pwd.getpwnam("nobody").pw_gid
1022
2131
except KeyError:
1023
2132
uid = 65534
1024
2133
gid = 65534
1025
2134
try:
1026
2135
os.setgid(gid)
1027
2136
os.setuid(uid)
1028
except OSError, error:
2137
except OSError as error:
1029
2138
if error[0] != errno.EPERM:
1030
2139
raise error
1031
2140
1032
# Enable all possible GnuTLS debugging
1033
2141
if debug:
2142
# Enable all possible GnuTLS debugging
2143
1034
2144
# "Use a log level over 10 to enable all debugging options."
1035
2145
# - GnuTLS manual
1036
2146
gnutls.library.functions.gnutls_global_set_log_level(11)
1041
2151
1042
2152
(gnutls.library.functions
1043
2153
.gnutls_global_set_log_function(debug_gnutls))
1044
1045
global service
1046
service = AvahiService(name = server_settings["servicename"],
1047
servicetype = "_mandos._tcp", )
1048
if server_settings["interface"]:
1049
service.interface = (if_nametoindex
1050
(server_settings["interface"]))
2154
2155
# Redirect stdin so all checkers get /dev/null
2156
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2157
os.dup2(null, sys.stdin.fileno())
2158
if null > 2:
2159
os.close(null)
2160
2161
# Need to fork before connecting to D-Bus
2162
if not debug:
2163
# Close all input and output, do double fork, etc.
2164
daemon()
2165
2166
gobject.threads_init()
1051
2167
1052
2168
global main_loop
1053
global bus
1054
global server
1055
2169
# From the Avahi example code
1056
2170
DBusGMainLoop(set_as_default=True )
1057
2171
main_loop = gobject.MainLoop()
1058
2172
bus = dbus.SystemBus()
1059
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
1060
avahi.DBUS_PATH_SERVER),
1061
avahi.DBUS_INTERFACE_SERVER)
1062
2173
# End of Avahi example code
1063
2174
if use_dbus:
1064
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
1065
1066
clients.update(Set(Client(name = section,
1067
config
1068
= dict(client_config.items(section)),
1069
use_dbus = use_dbus)
1070
for section in client_config.sections()))
1071
if not clients:
1072
logger.warning(u"No clients defined")
1073
1074
if debug:
1075
# Redirect stdin so all checkers get /dev/null
1076
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1077
os.dup2(null, sys.stdin.fileno())
1078
if null > 2:
1079
os.close(null)
1080
else:
1081
# No console logging
1082
logger.removeHandler(console)
1083
# Close all input and output, do double fork, etc.
1084
daemon()
1085
1086
try:
1087
pid = os.getpid()
1088
pidfile.write(str(pid) + "\n")
1089
pidfile.close()
1090
del pidfile
1091
except IOError:
1092
logger.error(u"Could not write to file %r with PID %d",
1093
pidfilename, pid)
1094
except NameError:
1095
# "pidfile" was never created
1096
pass
1097
del pidfilename
1098
1099
def cleanup():
1100
"Cleanup function; run on exit"
1101
global group
1102
# From the Avahi example code
1103
if not group is None:
1104
group.Free()
1105
group = None
1106
# End of Avahi example code
2175
try:
2176
bus_name = dbus.service.BusName("se.recompile.Mandos",
2177
bus, do_not_queue=True)
2178
old_bus_name = (dbus.service.BusName
2179
("se.bsnet.fukt.Mandos", bus,
2180
do_not_queue=True))
2181
except dbus.exceptions.NameExistsException as e:
2182
logger.error(unicode(e) + ", disabling D-Bus")
2183
use_dbus = False
2184
server_settings["use_dbus"] = False
2185
tcp_server.use_dbus = False
2186
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2187
service = AvahiServiceToSyslog(name =
2188
server_settings["servicename"],
2189
servicetype = "_mandos._tcp",
2190
protocol = protocol, bus = bus)
2191
if server_settings["interface"]:
2192
service.interface = (if_nametoindex
2193
(str(server_settings["interface"])))
2194
2195
global multiprocessing_manager
2196
multiprocessing_manager = multiprocessing.Manager()
2197
2198
client_class = Client
2199
if use_dbus:
2200
client_class = functools.partial(ClientDBusTransitional,
2201
bus = bus)
2202
2203
client_settings = Client.config_parser(client_config)
2204
old_client_settings = {}
2205
clients_data = {}
2206
2207
# Get client data and settings from last running state.
2208
if server_settings["restore"]:
2209
try:
2210
with open(stored_state_path, "rb") as stored_state:
2211
clients_data, old_client_settings = (pickle.load
2212
(stored_state))
2213
os.remove(stored_state_path)
2214
except IOError as e:
2215
logger.warning("Could not load persistent state: {0}"
2216
.format(e))
2217
if e.errno != errno.ENOENT:
2218
raise
2219
except EOFError as e:
2220
logger.warning("Could not load persistent state: "
2221
"EOFError: {0}".format(e))
2222
2223
with PGPEngine() as pgp:
2224
for client_name, client in clients_data.iteritems():
2225
# Decide which value to use after restoring saved state.
2226
# We have three different values: Old config file,
2227
# new config file, and saved state.
2228
# New config value takes precedence if it differs from old
2229
# config value, otherwise use saved state.
2230
for name, value in client_settings[client_name].items():
2231
try:
2232
# For each value in new config, check if it
2233
# differs from the old config value (Except for
2234
# the "secret" attribute)
2235
if (name != "secret" and
2236
value != old_client_settings[client_name]
2237
[name]):
2238
client[name] = value
2239
except KeyError:
2240
pass
2241
2242
# Clients who has passed its expire date can still be
2243
# enabled if its last checker was successful. Clients
2244
# whose checker failed before we stored its state is
2245
# assumed to have failed all checkers during downtime.
2246
if client["enabled"]:
2247
if datetime.datetime.utcnow() >= client["expires"]:
2248
if not client["last_checked_ok"]:
2249
logger.warning(
2250
"disabling client {0} - Client never "
2251
"performed a successfull checker"
2252
.format(client["name"]))
2253
client["enabled"] = False
2254
elif client["last_checker_status"] != 0:
2255
logger.warning(
2256
"disabling client {0} - Client "
2257
"last checker failed with error code {1}"
2258
.format(client["name"],
2259
client["last_checker_status"]))
2260
client["enabled"] = False
2261
else:
2262
client["expires"] = (datetime.datetime
2263
.utcnow()
2264
+ client["timeout"])
2265
2266
try:
2267
client["secret"] = (
2268
pgp.decrypt(client["encrypted_secret"],
2269
client_settings[client_name]
2270
["secret"]))
2271
except PGPError:
2272
# If decryption fails, we use secret from new settings
2273
logger.debug("Failed to decrypt {0} old secret"
2274
.format(client_name))
2275
client["secret"] = (
2276
client_settings[client_name]["secret"])
2277
2278
2279
# Add/remove clients based on new changes made to config
2280
for client_name in set(old_client_settings) - set(client_settings):
2281
del clients_data[client_name]
2282
for client_name in set(client_settings) - set(old_client_settings):
2283
clients_data[client_name] = client_settings[client_name]
2284
2285
# Create clients all clients
2286
for client_name, client in clients_data.iteritems():
2287
tcp_server.clients[client_name] = client_class(
2288
name = client_name, settings = client)
2289
2290
if not tcp_server.clients:
2291
logger.warning("No clients defined")
1107
2292
1108
while clients:
1109
client = clients.pop()
1110
client.disable_hook = None
1111
client.disable()
1112
1113
atexit.register(cleanup)
1114
1115
2293
if not debug:
2294
try:
2295
with pidfile:
2296
pid = os.getpid()
2297
pidfile.write(str(pid) + "\n".encode("utf-8"))
2298
del pidfile
2299
except IOError:
2300
logger.error("Could not write to file %r with PID %d",
2301
pidfilename, pid)
2302
except NameError:
2303
# "pidfile" was never created
2304
pass
2305
del pidfilename
1116
2306
signal.signal(signal.SIGINT, signal.SIG_IGN)
2307
1117
2308
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1118
2309
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1119
2310
1120
2311
if use_dbus:
1121
class MandosServer(dbus.service.Object):
2312
class MandosDBusService(dbus.service.Object):
1122
2313
"""A D-Bus proxy object"""
1123
2314
def __init__(self):
1124
2315
dbus.service.Object.__init__(self, bus, "/")
1125
_interface = u"se.bsnet.fukt.Mandos"
1126
1127
@dbus.service.signal(_interface, signature="oa{sv}")
1128
def ClientAdded(self, objpath, properties):
2316
_interface = "se.recompile.Mandos"
2317
2318
@dbus.service.signal(_interface, signature="o")
2319
def ClientAdded(self, objpath):
2320
"D-Bus signal"
2321
pass
2322
2323
@dbus.service.signal(_interface, signature="ss")
2324
def ClientNotFound(self, fingerprint, address):
1129
2325
"D-Bus signal"
1130
2326
pass
1131
2327
1137
2333
@dbus.service.method(_interface, out_signature="ao")
1138
2334
def GetAllClients(self):
1139
2335
"D-Bus method"
1140
return dbus.Array(c.dbus_object_path for c in clients)
2336
return dbus.Array(c.dbus_object_path
2337
for c in
2338
tcp_server.clients.itervalues())
1141
2339
1142
@dbus.service.method(_interface, out_signature="a{oa{sv}}")
2340
@dbus.service.method(_interface,
2341
out_signature="a{oa{sv}}")
1143
2342
def GetAllClientsWithProperties(self):
1144
2343
"D-Bus method"
1145
2344
return dbus.Dictionary(
1146
((c.dbus_object_path, c.GetAllProperties())
1147
for c in clients),
2345
((c.dbus_object_path, c.GetAll(""))
2346
for c in tcp_server.clients.itervalues()),
1148
2347
signature="oa{sv}")
1149
2348
1150
2349
@dbus.service.method(_interface, in_signature="o")
1151
2350
def RemoveClient(self, object_path):
1152
2351
"D-Bus method"
1153
for c in clients:
2352
for c in tcp_server.clients.itervalues():
1154
2353
if c.dbus_object_path == object_path:
1155
clients.remove(c)
2354
del tcp_server.clients[c.name]
2355
c.remove_from_connection()
1156
2356
# Don't signal anything except ClientRemoved
1157
c.use_dbus = False
1158
c.disable()
2357
c.disable(quiet=True)
1159
2358
# Emit D-Bus signal
1160
2359
self.ClientRemoved(object_path, c.name)
1161
2360
return
1162
raise KeyError
2361
raise KeyError(object_path)
1163
2362
1164
2363
del _interface
1165
2364
1166
mandos_server = MandosServer()
1167
1168
for client in clients:
2365
class MandosDBusServiceTransitional(MandosDBusService):
2366
__metaclass__ = AlternateDBusNamesMetaclass
2367
mandos_dbus_service = MandosDBusServiceTransitional()
2368
2369
def cleanup():
2370
"Cleanup function; run on exit"
2371
service.cleanup()
2372
2373
multiprocessing.active_children()
2374
if not (tcp_server.clients or client_settings):
2375
return
2376
2377
# Store client before exiting. Secrets are encrypted with key
2378
# based on what config file has. If config file is
2379
# removed/edited, old secret will thus be unrecovable.
2380
clients = {}
2381
with PGPEngine() as pgp:
2382
for client in tcp_server.clients.itervalues():
2383
key = client_settings[client.name]["secret"]
2384
client.encrypted_secret = pgp.encrypt(client.secret,
2385
key)
2386
client_dict = {}
2387
2388
# A list of attributes that can not be pickled
2389
# + secret.
2390
exclude = set(("bus", "changedstate", "secret",
2391
"checker"))
2392
for name, typ in (inspect.getmembers
2393
(dbus.service.Object)):
2394
exclude.add(name)
2395
2396
client_dict["encrypted_secret"] = (client
2397
.encrypted_secret)
2398
for attr in client.client_structure:
2399
if attr not in exclude:
2400
client_dict[attr] = getattr(client, attr)
2401
2402
clients[client.name] = client_dict
2403
del client_settings[client.name]["secret"]
2404
2405
try:
2406
tempfd, tempname = tempfile.mkstemp(suffix=".pickle",
2407
prefix="clients-",
2408
dir=os.path.dirname
2409
(stored_state_path))
2410
with os.fdopen(tempfd, "wb") as stored_state:
2411
pickle.dump((clients, client_settings), stored_state)
2412
os.rename(tempname, stored_state_path)
2413
except (IOError, OSError) as e:
2414
logger.warning("Could not save persistent state: {0}"
2415
.format(e))
2416
if not debug:
2417
try:
2418
os.remove(tempname)
2419
except NameError:
2420
pass
2421
if e.errno not in set((errno.ENOENT, errno.EACCES,
2422
errno.EEXIST)):
2423
raise e
2424
2425
# Delete all clients, and settings from config
2426
while tcp_server.clients:
2427
name, client = tcp_server.clients.popitem()
2428
if use_dbus:
2429
client.remove_from_connection()
2430
# Don't signal anything except ClientRemoved
2431
client.disable(quiet=True)
2432
if use_dbus:
2433
# Emit D-Bus signal
2434
mandos_dbus_service.ClientRemoved(client
2435
.dbus_object_path,
2436
client.name)
2437
client_settings.clear()
2438
2439
atexit.register(cleanup)
2440
2441
for client in tcp_server.clients.itervalues():
1169
2442
if use_dbus:
1170
2443
# Emit D-Bus signal
1171
mandos_server.ClientAdded(client.dbus_object_path,
1172
client.GetAllProperties())
1173
client.enable()
2444
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2445
# Need to initiate checking of clients
2446
if client.enabled:
2447
client.init_checker()
1174
2448
1175
2449
tcp_server.enable()
1176
2450
tcp_server.server_activate()
1177
2451
1178
2452
# Find out what port we got
1179
2453
service.port = tcp_server.socket.getsockname()[1]
1180
logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
1181
u" scope_id %d" % tcp_server.socket.getsockname())
2454
if use_ipv6:
2455
logger.info("Now listening on address %r, port %d,"
2456
" flowinfo %d, scope_id %d"
2457
% tcp_server.socket.getsockname())
2458
else: # IPv4
2459
logger.info("Now listening on address %r, port %d"
2460
% tcp_server.socket.getsockname())
1182
2461
1183
2462
#service.interface = tcp_server.socket.getsockname()[3]
1184
2463
1185
2464
try:
1186
2465
# From the Avahi example code
1187
server.connect_to_signal("StateChanged", server_state_changed)
1188
2466
try:
1189
server_state_changed(server.GetState())
1190
except dbus.exceptions.DBusException, error:
1191
logger.critical(u"DBusException: %s", error)
2467
service.activate()
2468
except dbus.exceptions.DBusException as error:
2469
logger.critical("DBusException: %s", error)
2470
cleanup()
1192
2471
sys.exit(1)
1193
2472
# End of Avahi example code
1194
2473
1197
2476
(tcp_server.handle_request
1198
2477
(*args[2:], **kwargs) or True))
1199
2478
1200
logger.debug(u"Starting main loop")
2479
logger.debug("Starting main loop")
1201
2480
main_loop.run()
1202
except AvahiError, error:
1203
logger.critical(u"AvahiError: %s", error)
2481
except AvahiError as error:
2482
logger.critical("AvahiError: %s", error)
2483
cleanup()
1204
2484
sys.exit(1)
1205
2485
except KeyboardInterrupt:
1206
2486
if debug:
1207
print
2487
print("", file=sys.stderr)
2488
logger.debug("Server received KeyboardInterrupt")
2489
logger.debug("Server exiting")
2490
# Must run before the D-Bus bus name gets deregistered
2491
cleanup()
1208
2492
1209
2493
if __name__ == '__main__':
1210
2494
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0