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- Committer: Teddy Hogeborn
- Date: 2009-04-16 06:47:28 UTC
- Revision ID: teddy@fukt.bsnet.se-20090416064728-c3d36mvgxo5q9aoh
* mandos: Import "SocketServer" as "socketserver" and "ConfigParser"
as "configparser". All users changed.
as "configparser". All users changed.
- files removed:
- 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", "remove", "server_state_changed",
10
# "entry_group_state_changed", "cleanup", and "activate" in the
11
# "AvahiService" class, and some lines in "main".
9
# methods "add" and "remove" in the "AvahiService" class, the
10
# "server_state_changed" and "entry_group_state_changed" functions,
11
# and some lines in "main".
12
12
#
13
13
# Everything else is
14
# Copyright © 2008-2012 Teddy Hogeborn
15
# Copyright © 2008-2012 Björn Påhlsson
14
# Copyright © 2008,2009 Teddy Hogeborn
15
# Copyright © 2008,2009 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@recompile.se>.
31
# Contact the authors at <mandos@fukt.bsnet.se>.
32
32
#
33
33
34
from __future__ import (division, absolute_import, print_function,
35
unicode_literals)
34
from __future__ import division, with_statement, absolute_import
36
35
37
36
import SocketServer as socketserver
38
37
import socket
39
import argparse
38
import optparse
40
39
import datetime
41
40
import errno
42
41
import gnutls.crypto
56
55
import logging
57
56
import logging.handlers
58
57
import pwd
59
import contextlib
58
from contextlib import closing
60
59
import struct
61
60
import fcntl
62
import functools
63
import cPickle as pickle
64
import multiprocessing
65
import types
66
import binascii
67
import tempfile
68
61
69
62
import dbus
70
63
import dbus.service
73
66
from dbus.mainloop.glib import DBusGMainLoop
74
67
import ctypes
75
68
import ctypes.util
76
import xml.dom.minidom
77
import inspect
78
import GnuPGInterface
79
69
80
70
try:
81
71
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
83
73
try:
84
74
from IN import SO_BINDTODEVICE
85
75
except ImportError:
86
SO_BINDTODEVICE = None
87
88
version = "1.5.1"
89
stored_state_file = "clients.pickle"
90
91
logger = logging.getLogger()
76
# From /usr/include/asm/socket.h
77
SO_BINDTODEVICE = 25
78
79
80
version = "1.0.8"
81
82
logger = logging.Logger(u'mandos')
92
83
syslogger = (logging.handlers.SysLogHandler
93
84
(facility = logging.handlers.SysLogHandler.LOG_DAEMON,
94
address = str("/dev/log")))
95
96
try:
97
if_nametoindex = (ctypes.cdll.LoadLibrary
98
(ctypes.util.find_library("c"))
99
.if_nametoindex)
100
except (OSError, AttributeError):
101
def if_nametoindex(interface):
102
"Get an interface index the hard way, i.e. using fcntl()"
103
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
104
with contextlib.closing(socket.socket()) as s:
105
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
106
struct.pack(str("16s16x"),
107
interface))
108
interface_index = struct.unpack(str("I"),
109
ifreq[16:20])[0]
110
return interface_index
111
112
113
def initlogger(debug, level=logging.WARNING):
114
"""init logger and add loglevel"""
115
116
syslogger.setFormatter(logging.Formatter
117
('Mandos [%(process)d]: %(levelname)s:'
118
' %(message)s'))
119
logger.addHandler(syslogger)
120
121
if debug:
122
console = logging.StreamHandler()
123
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
124
' [%(process)d]:'
125
' %(levelname)s:'
126
' %(message)s'))
127
logger.addHandler(console)
128
logger.setLevel(level)
129
130
131
class PGPError(Exception):
132
"""Exception if encryption/decryption fails"""
133
pass
134
135
136
class PGPEngine(object):
137
"""A simple class for OpenPGP symmetric encryption & decryption"""
138
def __init__(self):
139
self.gnupg = GnuPGInterface.GnuPG()
140
self.tempdir = tempfile.mkdtemp(prefix="mandos-")
141
self.gnupg = GnuPGInterface.GnuPG()
142
self.gnupg.options.meta_interactive = False
143
self.gnupg.options.homedir = self.tempdir
144
self.gnupg.options.extra_args.extend(['--force-mdc',
145
'--quiet',
146
'--no-use-agent'])
147
148
def __enter__(self):
149
return self
150
151
def __exit__ (self, exc_type, exc_value, traceback):
152
self._cleanup()
153
return False
154
155
def __del__(self):
156
self._cleanup()
157
158
def _cleanup(self):
159
if self.tempdir is not None:
160
# Delete contents of tempdir
161
for root, dirs, files in os.walk(self.tempdir,
162
topdown = False):
163
for filename in files:
164
os.remove(os.path.join(root, filename))
165
for dirname in dirs:
166
os.rmdir(os.path.join(root, dirname))
167
# Remove tempdir
168
os.rmdir(self.tempdir)
169
self.tempdir = None
170
171
def password_encode(self, password):
172
# Passphrase can not be empty and can not contain newlines or
173
# NUL bytes. So we prefix it and hex encode it.
174
return b"mandos" + binascii.hexlify(password)
175
176
def encrypt(self, data, password):
177
self.gnupg.passphrase = self.password_encode(password)
178
with open(os.devnull) as devnull:
179
try:
180
proc = self.gnupg.run(['--symmetric'],
181
create_fhs=['stdin', 'stdout'],
182
attach_fhs={'stderr': devnull})
183
with contextlib.closing(proc.handles['stdin']) as f:
184
f.write(data)
185
with contextlib.closing(proc.handles['stdout']) as f:
186
ciphertext = f.read()
187
proc.wait()
188
except IOError as e:
189
raise PGPError(e)
190
self.gnupg.passphrase = None
191
return ciphertext
192
193
def decrypt(self, data, password):
194
self.gnupg.passphrase = self.password_encode(password)
195
with open(os.devnull) as devnull:
196
try:
197
proc = self.gnupg.run(['--decrypt'],
198
create_fhs=['stdin', 'stdout'],
199
attach_fhs={'stderr': devnull})
200
with contextlib.closing(proc.handles['stdin'] ) as f:
201
f.write(data)
202
with contextlib.closing(proc.handles['stdout']) as f:
203
decrypted_plaintext = f.read()
204
proc.wait()
205
except IOError as e:
206
raise PGPError(e)
207
self.gnupg.passphrase = None
208
return decrypted_plaintext
209
210
85
address = "/dev/log"))
86
syslogger.setFormatter(logging.Formatter
87
(u'Mandos [%(process)d]: %(levelname)s:'
88
u' %(message)s'))
89
logger.addHandler(syslogger)
90
91
console = logging.StreamHandler()
92
console.setFormatter(logging.Formatter(u'%(name)s [%(process)d]:'
93
u' %(levelname)s:'
94
u' %(message)s'))
95
logger.addHandler(console)
211
96
212
97
class AvahiError(Exception):
213
98
def __init__(self, value, *args, **kwargs):
229
114
Attributes:
230
115
interface: integer; avahi.IF_UNSPEC or an interface index.
231
116
Used to optionally bind to the specified interface.
232
name: string; Example: 'Mandos'
233
type: string; Example: '_mandos._tcp'.
117
name: string; Example: u'Mandos'
118
type: string; Example: u'_mandos._tcp'.
234
119
See <http://www.dns-sd.org/ServiceTypes.html>
235
120
port: integer; what port to announce
236
121
TXT: list of strings; TXT record for the service
239
124
max_renames: integer; maximum number of renames
240
125
rename_count: integer; counter so we only rename after collisions
241
126
a sensible number of times
242
group: D-Bus Entry Group
243
server: D-Bus Server
244
bus: dbus.SystemBus()
245
127
"""
246
128
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
247
129
servicetype = None, port = None, TXT = None,
248
domain = "", host = "", max_renames = 32768,
249
protocol = avahi.PROTO_UNSPEC, bus = None):
130
domain = u"", host = u"", max_renames = 32768,
131
protocol = avahi.PROTO_UNSPEC):
250
132
self.interface = interface
251
133
self.name = name
252
134
self.type = servicetype
257
139
self.rename_count = 0
258
140
self.max_renames = max_renames
259
141
self.protocol = protocol
260
self.group = None # our entry group
261
self.server = None
262
self.bus = bus
263
self.entry_group_state_changed_match = None
264
142
def rename(self):
265
143
"""Derived from the Avahi example code"""
266
144
if self.rename_count >= self.max_renames:
267
logger.critical("No suitable Zeroconf service name found"
268
" after %i retries, exiting.",
145
logger.critical(u"No suitable Zeroconf service name found"
146
u" after %i retries, exiting.",
269
147
self.rename_count)
270
raise AvahiServiceError("Too many renames")
271
self.name = unicode(self.server
272
.GetAlternativeServiceName(self.name))
273
logger.info("Changing Zeroconf service name to %r ...",
148
raise AvahiServiceError(u"Too many renames")
149
self.name = server.GetAlternativeServiceName(self.name)
150
logger.info(u"Changing Zeroconf service name to %r ...",
274
151
self.name)
152
syslogger.setFormatter(logging.Formatter
153
(u'Mandos (%s) [%%(process)d]:'
154
u' %%(levelname)s: %%(message)s'
155
% self.name))
275
156
self.remove()
276
try:
277
self.add()
278
except dbus.exceptions.DBusException as error:
279
logger.critical("DBusException: %s", error)
280
self.cleanup()
281
os._exit(1)
157
self.add()
282
158
self.rename_count += 1
283
159
def remove(self):
284
160
"""Derived from the Avahi example code"""
285
if self.entry_group_state_changed_match is not None:
286
self.entry_group_state_changed_match.remove()
287
self.entry_group_state_changed_match = None
288
if self.group is not None:
289
self.group.Reset()
161
if group is not None:
162
group.Reset()
290
163
def add(self):
291
164
"""Derived from the Avahi example code"""
292
self.remove()
293
if self.group is None:
294
self.group = dbus.Interface(
295
self.bus.get_object(avahi.DBUS_NAME,
296
self.server.EntryGroupNew()),
297
avahi.DBUS_INTERFACE_ENTRY_GROUP)
298
self.entry_group_state_changed_match = (
299
self.group.connect_to_signal(
300
'StateChanged', self.entry_group_state_changed))
301
logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
302
self.name, self.type)
303
self.group.AddService(
304
self.interface,
305
self.protocol,
306
dbus.UInt32(0), # flags
307
self.name, self.type,
308
self.domain, self.host,
309
dbus.UInt16(self.port),
310
avahi.string_array_to_txt_array(self.TXT))
311
self.group.Commit()
312
def entry_group_state_changed(self, state, error):
313
"""Derived from the Avahi example code"""
314
logger.debug("Avahi entry group state change: %i", state)
315
316
if state == avahi.ENTRY_GROUP_ESTABLISHED:
317
logger.debug("Zeroconf service established.")
318
elif state == avahi.ENTRY_GROUP_COLLISION:
319
logger.info("Zeroconf service name collision.")
320
self.rename()
321
elif state == avahi.ENTRY_GROUP_FAILURE:
322
logger.critical("Avahi: Error in group state changed %s",
323
unicode(error))
324
raise AvahiGroupError("State changed: %s"
325
% unicode(error))
326
def cleanup(self):
327
"""Derived from the Avahi example code"""
328
if self.group is not None:
329
try:
330
self.group.Free()
331
except (dbus.exceptions.UnknownMethodException,
332
dbus.exceptions.DBusException):
333
pass
334
self.group = None
335
self.remove()
336
def server_state_changed(self, state, error=None):
337
"""Derived from the Avahi example code"""
338
logger.debug("Avahi server state change: %i", state)
339
bad_states = { avahi.SERVER_INVALID:
340
"Zeroconf server invalid",
341
avahi.SERVER_REGISTERING: None,
342
avahi.SERVER_COLLISION:
343
"Zeroconf server name collision",
344
avahi.SERVER_FAILURE:
345
"Zeroconf server failure" }
346
if state in bad_states:
347
if bad_states[state] is not None:
348
if error is None:
349
logger.error(bad_states[state])
350
else:
351
logger.error(bad_states[state] + ": %r", error)
352
self.cleanup()
353
elif state == avahi.SERVER_RUNNING:
354
self.add()
355
else:
356
if error is None:
357
logger.debug("Unknown state: %r", state)
358
else:
359
logger.debug("Unknown state: %r: %r", state, error)
360
def activate(self):
361
"""Derived from the Avahi example code"""
362
if self.server is None:
363
self.server = dbus.Interface(
364
self.bus.get_object(avahi.DBUS_NAME,
365
avahi.DBUS_PATH_SERVER,
366
follow_name_owner_changes=True),
367
avahi.DBUS_INTERFACE_SERVER)
368
self.server.connect_to_signal("StateChanged",
369
self.server_state_changed)
370
self.server_state_changed(self.server.GetState())
371
372
class AvahiServiceToSyslog(AvahiService):
373
def rename(self):
374
"""Add the new name to the syslog messages"""
375
ret = AvahiService.rename(self)
376
syslogger.setFormatter(logging.Formatter
377
('Mandos (%s) [%%(process)d]:'
378
' %%(levelname)s: %%(message)s'
379
% self.name))
380
return ret
381
382
def timedelta_to_milliseconds(td):
383
"Convert a datetime.timedelta() to milliseconds"
384
return ((td.days * 24 * 60 * 60 * 1000)
385
+ (td.seconds * 1000)
386
+ (td.microseconds // 1000))
387
165
global group
166
if group is None:
167
group = dbus.Interface(bus.get_object
168
(avahi.DBUS_NAME,
169
server.EntryGroupNew()),
170
avahi.DBUS_INTERFACE_ENTRY_GROUP)
171
group.connect_to_signal('StateChanged',
172
entry_group_state_changed)
173
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
174
service.name, service.type)
175
group.AddService(
176
self.interface, # interface
177
self.protocol, # protocol
178
dbus.UInt32(0), # flags
179
self.name, self.type,
180
self.domain, self.host,
181
dbus.UInt16(self.port),
182
avahi.string_array_to_txt_array(self.TXT))
183
group.Commit()
184
185
# From the Avahi example code:
186
group = None # our entry group
187
# End of Avahi example code
188
189
190
def _datetime_to_dbus(dt, variant_level=0):
191
"""Convert a UTC datetime.datetime() to a D-Bus type."""
192
return dbus.String(dt.isoformat(), variant_level=variant_level)
193
194
388
195
class Client(object):
389
196
"""A representation of a client host served by this server.
390
197
391
198
Attributes:
392
approved: bool(); 'None' if not yet approved/disapproved
393
approval_delay: datetime.timedelta(); Time to wait for approval
394
approval_duration: datetime.timedelta(); Duration of one approval
199
name: string; from the config file, used in log messages and
200
D-Bus identifiers
201
fingerprint: string (40 or 32 hexadecimal digits); used to
202
uniquely identify the client
203
secret: bytestring; sent verbatim (over TLS) to client
204
host: string; available for use by the checker command
205
created: datetime.datetime(); (UTC) object creation
206
last_enabled: datetime.datetime(); (UTC)
207
enabled: bool()
208
last_checked_ok: datetime.datetime(); (UTC) or None
209
timeout: datetime.timedelta(); How long from last_checked_ok
210
until this client is invalid
211
interval: datetime.timedelta(); How often to start a new checker
212
disable_hook: If set, called by disable() as disable_hook(self)
395
213
checker: subprocess.Popen(); a running checker process used
396
214
to see if the client lives.
397
215
'None' if no process is running.
398
checker_callback_tag: a gobject event source tag, or None
399
checker_command: string; External command which is run to check
400
if client lives. %() expansions are done at
216
checker_initiator_tag: a gobject event source tag, or None
217
disable_initiator_tag: - '' -
218
checker_callback_tag: - '' -
219
checker_command: string; External command which is run to check if
220
client lives. %() expansions are done at
401
221
runtime with vars(self) as dict, so that for
402
222
instance %(name)s can be used in the command.
403
checker_initiator_tag: a gobject event source tag, or None
404
created: datetime.datetime(); (UTC) object creation
405
client_structure: Object describing what attributes a client has
406
and is used for storing the client at exit
407
223
current_checker_command: string; current running checker_command
408
disable_initiator_tag: a gobject event source tag, or None
409
enabled: bool()
410
fingerprint: string (40 or 32 hexadecimal digits); used to
411
uniquely identify the client
412
host: string; available for use by the checker command
413
interval: datetime.timedelta(); How often to start a new checker
414
last_approval_request: datetime.datetime(); (UTC) or None
415
last_checked_ok: datetime.datetime(); (UTC) or None
416
last_checker_status: integer between 0 and 255 reflecting exit
417
status of last checker. -1 reflects crashed
418
checker, or None.
419
last_enabled: datetime.datetime(); (UTC) or None
420
name: string; from the config file, used in log messages and
421
D-Bus identifiers
422
secret: bytestring; sent verbatim (over TLS) to client
423
timeout: datetime.timedelta(); How long from last_checked_ok
424
until this client is disabled
425
extended_timeout: extra long timeout when secret has been sent
426
runtime_expansions: Allowed attributes for runtime expansion.
427
expires: datetime.datetime(); time (UTC) when a client will be
428
disabled, or None
429
224
"""
430
225
431
runtime_expansions = ("approval_delay", "approval_duration",
432
"created", "enabled", "fingerprint",
433
"host", "interval", "last_checked_ok",
434
"last_enabled", "name", "timeout")
435
client_defaults = { "timeout": "5m",
436
"extended_timeout": "15m",
437
"interval": "2m",
438
"checker": "fping -q -- %%(host)s",
439
"host": "",
440
"approval_delay": "0s",
441
"approval_duration": "1s",
442
"approved_by_default": "True",
443
"enabled": "True",
444
}
226
@staticmethod
227
def _datetime_to_milliseconds(dt):
228
"Convert a datetime.datetime() to milliseconds"
229
return ((dt.days * 24 * 60 * 60 * 1000)
230
+ (dt.seconds * 1000)
231
+ (dt.microseconds // 1000))
445
232
446
233
def timeout_milliseconds(self):
447
234
"Return the 'timeout' attribute in milliseconds"
448
return timedelta_to_milliseconds(self.timeout)
449
450
def extended_timeout_milliseconds(self):
451
"Return the 'extended_timeout' attribute in milliseconds"
452
return timedelta_to_milliseconds(self.extended_timeout)
235
return self._datetime_to_milliseconds(self.timeout)
453
236
454
237
def interval_milliseconds(self):
455
238
"Return the 'interval' attribute in milliseconds"
456
return timedelta_to_milliseconds(self.interval)
239
return self._datetime_to_milliseconds(self.interval)
457
240
458
def approval_delay_milliseconds(self):
459
return timedelta_to_milliseconds(self.approval_delay)
460
461
@staticmethod
462
def config_parser(config):
463
"""Construct a new dict of client settings of this form:
464
{ client_name: {setting_name: value, ...}, ...}
465
with exceptions for any special settings as defined above.
466
NOTE: Must be a pure function. Must return the same result
467
value given the same arguments.
468
"""
469
settings = {}
470
for client_name in config.sections():
471
section = dict(config.items(client_name))
472
client = settings[client_name] = {}
473
474
client["host"] = section["host"]
475
# Reformat values from string types to Python types
476
client["approved_by_default"] = config.getboolean(
477
client_name, "approved_by_default")
478
client["enabled"] = config.getboolean(client_name,
479
"enabled")
480
481
client["fingerprint"] = (section["fingerprint"].upper()
482
.replace(" ", ""))
483
if "secret" in section:
484
client["secret"] = section["secret"].decode("base64")
485
elif "secfile" in section:
486
with open(os.path.expanduser(os.path.expandvars
487
(section["secfile"])),
488
"rb") as secfile:
489
client["secret"] = secfile.read()
490
else:
491
raise TypeError("No secret or secfile for section %s"
492
% section)
493
client["timeout"] = string_to_delta(section["timeout"])
494
client["extended_timeout"] = string_to_delta(
495
section["extended_timeout"])
496
client["interval"] = string_to_delta(section["interval"])
497
client["approval_delay"] = string_to_delta(
498
section["approval_delay"])
499
client["approval_duration"] = string_to_delta(
500
section["approval_duration"])
501
client["checker_command"] = section["checker"]
502
client["last_approval_request"] = None
503
client["last_checked_ok"] = None
504
client["last_checker_status"] = None
505
506
return settings
507
508
509
def __init__(self, settings, name = None):
241
def __init__(self, name = None, disable_hook=None, config=None):
510
242
"""Note: the 'checker' key in 'config' sets the
511
243
'checker_command' attribute and *not* the 'checker'
512
244
attribute."""
513
245
self.name = name
514
# adding all client settings
515
for setting, value in settings.iteritems():
516
setattr(self, setting, value)
517
518
if self.enabled:
519
if not hasattr(self, "last_enabled"):
520
self.last_enabled = datetime.datetime.utcnow()
521
if not hasattr(self, "expires"):
522
self.expires = (datetime.datetime.utcnow()
523
+ self.timeout)
524
else:
525
self.last_enabled = None
526
self.expires = None
527
528
logger.debug("Creating client %r", self.name)
246
if config is None:
247
config = {}
248
logger.debug(u"Creating client %r", self.name)
529
249
# Uppercase and remove spaces from fingerprint for later
530
250
# comparison purposes with return value from the fingerprint()
531
251
# function
532
logger.debug(" Fingerprint: %s", self.fingerprint)
533
self.created = settings.get("created",
534
datetime.datetime.utcnow())
535
536
# attributes specific for this server instance
252
self.fingerprint = (config[u"fingerprint"].upper()
253
.replace(u" ", u""))
254
logger.debug(u" Fingerprint: %s", self.fingerprint)
255
if u"secret" in config:
256
self.secret = config[u"secret"].decode(u"base64")
257
elif u"secfile" in config:
258
with closing(open(os.path.expanduser
259
(os.path.expandvars
260
(config[u"secfile"])))) as secfile:
261
self.secret = secfile.read()
262
else:
263
raise TypeError(u"No secret or secfile for client %s"
264
% self.name)
265
self.host = config.get(u"host", u"")
266
self.created = datetime.datetime.utcnow()
267
self.enabled = False
268
self.last_enabled = None
269
self.last_checked_ok = None
270
self.timeout = string_to_delta(config[u"timeout"])
271
self.interval = string_to_delta(config[u"interval"])
272
self.disable_hook = disable_hook
537
273
self.checker = None
538
274
self.checker_initiator_tag = None
539
275
self.disable_initiator_tag = None
540
276
self.checker_callback_tag = None
277
self.checker_command = config[u"checker"]
541
278
self.current_checker_command = None
542
self.approved = None
543
self.approvals_pending = 0
544
self.changedstate = (multiprocessing_manager
545
.Condition(multiprocessing_manager
546
.Lock()))
547
self.client_structure = [attr for attr in
548
self.__dict__.iterkeys()
549
if not attr.startswith("_")]
550
self.client_structure.append("client_structure")
551
552
for name, t in inspect.getmembers(type(self),
553
lambda obj:
554
isinstance(obj,
555
property)):
556
if not name.startswith("_"):
557
self.client_structure.append(name)
558
559
# Send notice to process children that client state has changed
560
def send_changedstate(self):
561
with self.changedstate:
562
self.changedstate.notify_all()
279
self.last_connect = None
563
280
564
281
def enable(self):
565
282
"""Start this client's checker and timeout hooks"""
566
if getattr(self, "enabled", False):
567
# Already enabled
568
return
569
self.send_changedstate()
570
self.expires = datetime.datetime.utcnow() + self.timeout
571
self.enabled = True
572
283
self.last_enabled = datetime.datetime.utcnow()
573
self.init_checker()
574
575
def disable(self, quiet=True):
576
"""Disable this client."""
577
if not getattr(self, "enabled", False):
578
return False
579
if not quiet:
580
self.send_changedstate()
581
if not quiet:
582
logger.info("Disabling client %s", self.name)
583
if getattr(self, "disable_initiator_tag", False):
584
gobject.source_remove(self.disable_initiator_tag)
585
self.disable_initiator_tag = None
586
self.expires = None
587
if getattr(self, "checker_initiator_tag", False):
588
gobject.source_remove(self.checker_initiator_tag)
589
self.checker_initiator_tag = None
590
self.stop_checker()
591
self.enabled = False
592
# Do not run this again if called by a gobject.timeout_add
593
return False
594
595
def __del__(self):
596
self.disable()
597
598
def init_checker(self):
599
284
# Schedule a new checker to be started an 'interval' from now,
600
285
# and every interval from then on.
601
286
self.checker_initiator_tag = (gobject.timeout_add
602
287
(self.interval_milliseconds(),
603
288
self.start_checker))
289
# Also start a new checker *right now*.
290
self.start_checker()
604
291
# Schedule a disable() when 'timeout' has passed
605
292
self.disable_initiator_tag = (gobject.timeout_add
606
293
(self.timeout_milliseconds(),
607
294
self.disable))
608
# Also start a new checker *right now*.
609
self.start_checker()
295
self.enabled = True
296
297
def disable(self):
298
"""Disable this client."""
299
if not getattr(self, "enabled", False):
300
return False
301
logger.info(u"Disabling client %s", self.name)
302
if getattr(self, u"disable_initiator_tag", False):
303
gobject.source_remove(self.disable_initiator_tag)
304
self.disable_initiator_tag = None
305
if getattr(self, u"checker_initiator_tag", False):
306
gobject.source_remove(self.checker_initiator_tag)
307
self.checker_initiator_tag = None
308
self.stop_checker()
309
if self.disable_hook:
310
self.disable_hook(self)
311
self.enabled = False
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()
610
318
611
319
def checker_callback(self, pid, condition, command):
612
320
"""The checker has completed, so take appropriate actions."""
613
321
self.checker_callback_tag = None
614
322
self.checker = None
615
323
if os.WIFEXITED(condition):
616
self.last_checker_status = os.WEXITSTATUS(condition)
617
if self.last_checker_status == 0:
618
logger.info("Checker for %(name)s succeeded",
324
exitstatus = os.WEXITSTATUS(condition)
325
if exitstatus == 0:
326
logger.info(u"Checker for %(name)s succeeded",
619
327
vars(self))
620
328
self.checked_ok()
621
329
else:
622
logger.info("Checker for %(name)s failed",
330
logger.info(u"Checker for %(name)s failed",
623
331
vars(self))
624
332
else:
625
self.last_checker_status = -1
626
logger.warning("Checker for %(name)s crashed?",
333
logger.warning(u"Checker for %(name)s crashed?",
627
334
vars(self))
628
335
629
def checked_ok(self, timeout=None):
336
def checked_ok(self):
630
337
"""Bump up the timeout for this client.
631
338
632
339
This should only be called when the client has been seen,
633
340
alive and well.
634
341
"""
635
if timeout is None:
636
timeout = self.timeout
637
342
self.last_checked_ok = datetime.datetime.utcnow()
638
if self.disable_initiator_tag is not None:
639
gobject.source_remove(self.disable_initiator_tag)
640
if getattr(self, "enabled", False):
641
self.disable_initiator_tag = (gobject.timeout_add
642
(timedelta_to_milliseconds
643
(timeout), self.disable))
644
self.expires = datetime.datetime.utcnow() + timeout
645
646
def need_approval(self):
647
self.last_approval_request = datetime.datetime.utcnow()
343
gobject.source_remove(self.disable_initiator_tag)
344
self.disable_initiator_tag = (gobject.timeout_add
345
(self.timeout_milliseconds(),
346
self.disable))
648
347
649
348
def start_checker(self):
650
349
"""Start a new checker subprocess if one is not running.
657
356
# client would inevitably timeout, since no checker would get
658
357
# a chance to run to completion. If we instead leave running
659
358
# checkers alone, the checker would have to take more time
660
# than 'timeout' for the client to be disabled, which is as it
661
# should be.
359
# than 'timeout' for the client to be declared invalid, which
360
# is as it should be.
662
361
663
362
# If a checker exists, make sure it is not a zombie
664
try:
363
if self.checker is not None:
665
364
pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
666
except (AttributeError, OSError) as error:
667
if (isinstance(error, OSError)
668
and error.errno != errno.ECHILD):
669
raise error
670
else:
671
365
if pid:
672
logger.warning("Checker was a zombie")
366
logger.warning(u"Checker was a zombie")
673
367
gobject.source_remove(self.checker_callback_tag)
674
368
self.checker_callback(pid, status,
675
369
self.current_checker_command)
680
374
command = self.checker_command % self.host
681
375
except TypeError:
682
376
# Escape attributes for the shell
683
escaped_attrs = dict(
684
(attr,
685
re.escape(unicode(str(getattr(self, attr, "")),
686
errors=
687
'replace')))
688
for attr in
689
self.runtime_expansions)
690
377
escaped_attrs = dict((key,
378
re.escape(unicode(str(val),
379
errors=
380
u'replace')))
381
for key, val in
382
vars(self).iteritems())
691
383
try:
692
384
command = self.checker_command % escaped_attrs
693
except TypeError as error:
694
logger.error('Could not format string "%s":'
695
' %s', self.checker_command, error)
385
except TypeError, error:
386
logger.error(u'Could not format string "%s":'
387
u' %s', self.checker_command, error)
696
388
return True # Try again later
697
389
self.current_checker_command = command
698
390
try:
699
logger.info("Starting checker %r for %s",
391
logger.info(u"Starting checker %r for %s",
700
392
command, self.name)
701
393
# We don't need to redirect stdout and stderr, since
702
394
# in normal mode, that is already done by daemon(),
704
396
# always replaced by /dev/null.)
705
397
self.checker = subprocess.Popen(command,
706
398
close_fds=True,
707
shell=True, cwd="/")
399
shell=True, cwd=u"/")
708
400
self.checker_callback_tag = (gobject.child_watch_add
709
401
(self.checker.pid,
710
402
self.checker_callback,
715
407
if pid:
716
408
gobject.source_remove(self.checker_callback_tag)
717
409
self.checker_callback(pid, status, command)
718
except OSError as error:
719
logger.error("Failed to start subprocess: %s",
410
except OSError, error:
411
logger.error(u"Failed to start subprocess: %s",
720
412
error)
721
413
# Re-run this periodically if run by gobject.timeout_add
722
414
return True
726
418
if self.checker_callback_tag:
727
419
gobject.source_remove(self.checker_callback_tag)
728
420
self.checker_callback_tag = None
729
if getattr(self, "checker", None) is None:
421
if getattr(self, u"checker", None) is None:
730
422
return
731
logger.debug("Stopping checker for %(name)s", vars(self))
423
logger.debug(u"Stopping checker for %(name)s", vars(self))
732
424
try:
733
425
os.kill(self.checker.pid, signal.SIGTERM)
734
#time.sleep(0.5)
426
#os.sleep(0.5)
735
427
#if self.checker.poll() is None:
736
428
# os.kill(self.checker.pid, signal.SIGKILL)
737
except OSError as error:
429
except OSError, error:
738
430
if error.errno != errno.ESRCH: # No such process
739
431
raise
740
432
self.checker = None
741
742
743
def dbus_service_property(dbus_interface, signature="v",
744
access="readwrite", byte_arrays=False):
745
"""Decorators for marking methods of a DBusObjectWithProperties to
746
become properties on the D-Bus.
747
748
The decorated method will be called with no arguments by "Get"
749
and with one argument by "Set".
750
751
The parameters, where they are supported, are the same as
752
dbus.service.method, except there is only "signature", since the
753
type from Get() and the type sent to Set() is the same.
754
"""
755
# Encoding deeply encoded byte arrays is not supported yet by the
756
# "Set" method, so we fail early here:
757
if byte_arrays and signature != "ay":
758
raise ValueError("Byte arrays not supported for non-'ay'"
759
" signature %r" % signature)
760
def decorator(func):
761
func._dbus_is_property = True
762
func._dbus_interface = dbus_interface
763
func._dbus_signature = signature
764
func._dbus_access = access
765
func._dbus_name = func.__name__
766
if func._dbus_name.endswith("_dbus_property"):
767
func._dbus_name = func._dbus_name[:-14]
768
func._dbus_get_args_options = {'byte_arrays': byte_arrays }
769
return func
770
return decorator
771
772
773
class DBusPropertyException(dbus.exceptions.DBusException):
774
"""A base class for D-Bus property-related exceptions
775
"""
776
def __unicode__(self):
777
return unicode(str(self))
778
779
780
class DBusPropertyAccessException(DBusPropertyException):
781
"""A property's access permissions disallows an operation.
782
"""
783
pass
784
785
786
class DBusPropertyNotFound(DBusPropertyException):
787
"""An attempt was made to access a non-existing property.
788
"""
789
pass
790
791
792
class DBusObjectWithProperties(dbus.service.Object):
793
"""A D-Bus object with properties.
794
795
Classes inheriting from this can use the dbus_service_property
796
decorator to expose methods as D-Bus properties. It exposes the
797
standard Get(), Set(), and GetAll() methods on the D-Bus.
798
"""
799
800
@staticmethod
801
def _is_dbus_property(obj):
802
return getattr(obj, "_dbus_is_property", False)
803
804
def _get_all_dbus_properties(self):
805
"""Returns a generator of (name, attribute) pairs
806
"""
807
return ((prop.__get__(self)._dbus_name, prop.__get__(self))
808
for cls in self.__class__.__mro__
809
for name, prop in
810
inspect.getmembers(cls, self._is_dbus_property))
811
812
def _get_dbus_property(self, interface_name, property_name):
813
"""Returns a bound method if one exists which is a D-Bus
814
property with the specified name and interface.
815
"""
816
for cls in self.__class__.__mro__:
817
for name, value in (inspect.getmembers
818
(cls, self._is_dbus_property)):
819
if (value._dbus_name == property_name
820
and value._dbus_interface == interface_name):
821
return value.__get__(self)
822
823
# No such property
824
raise DBusPropertyNotFound(self.dbus_object_path + ":"
825
+ interface_name + "."
826
+ property_name)
827
828
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
829
out_signature="v")
830
def Get(self, interface_name, property_name):
831
"""Standard D-Bus property Get() method, see D-Bus standard.
832
"""
833
prop = self._get_dbus_property(interface_name, property_name)
834
if prop._dbus_access == "write":
835
raise DBusPropertyAccessException(property_name)
836
value = prop()
837
if not hasattr(value, "variant_level"):
838
return value
839
return type(value)(value, variant_level=value.variant_level+1)
840
841
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
842
def Set(self, interface_name, property_name, value):
843
"""Standard D-Bus property Set() method, see D-Bus standard.
844
"""
845
prop = self._get_dbus_property(interface_name, property_name)
846
if prop._dbus_access == "read":
847
raise DBusPropertyAccessException(property_name)
848
if prop._dbus_get_args_options["byte_arrays"]:
849
# The byte_arrays option is not supported yet on
850
# signatures other than "ay".
851
if prop._dbus_signature != "ay":
852
raise ValueError
853
value = dbus.ByteArray(b''.join(chr(byte)
854
for byte in value))
855
prop(value)
856
857
@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
858
out_signature="a{sv}")
859
def GetAll(self, interface_name):
860
"""Standard D-Bus property GetAll() method, see D-Bus
861
standard.
862
863
Note: Will not include properties with access="write".
864
"""
865
properties = {}
866
for name, prop in self._get_all_dbus_properties():
867
if (interface_name
868
and interface_name != prop._dbus_interface):
869
# Interface non-empty but did not match
870
continue
871
# Ignore write-only properties
872
if prop._dbus_access == "write":
873
continue
874
value = prop()
875
if not hasattr(value, "variant_level"):
876
properties[name] = value
877
continue
878
properties[name] = type(value)(value, variant_level=
879
value.variant_level+1)
880
return dbus.Dictionary(properties, signature="sv")
881
882
@dbus.service.method(dbus.INTROSPECTABLE_IFACE,
883
out_signature="s",
884
path_keyword='object_path',
885
connection_keyword='connection')
886
def Introspect(self, object_path, connection):
887
"""Standard D-Bus method, overloaded to insert property tags.
888
"""
889
xmlstring = dbus.service.Object.Introspect(self, object_path,
890
connection)
891
try:
892
document = xml.dom.minidom.parseString(xmlstring)
893
def make_tag(document, name, prop):
894
e = document.createElement("property")
895
e.setAttribute("name", name)
896
e.setAttribute("type", prop._dbus_signature)
897
e.setAttribute("access", prop._dbus_access)
898
return e
899
for if_tag in document.getElementsByTagName("interface"):
900
for tag in (make_tag(document, name, prop)
901
for name, prop
902
in self._get_all_dbus_properties()
903
if prop._dbus_interface
904
== if_tag.getAttribute("name")):
905
if_tag.appendChild(tag)
906
# Add the names to the return values for the
907
# "org.freedesktop.DBus.Properties" methods
908
if (if_tag.getAttribute("name")
909
== "org.freedesktop.DBus.Properties"):
910
for cn in if_tag.getElementsByTagName("method"):
911
if cn.getAttribute("name") == "Get":
912
for arg in cn.getElementsByTagName("arg"):
913
if (arg.getAttribute("direction")
914
== "out"):
915
arg.setAttribute("name", "value")
916
elif cn.getAttribute("name") == "GetAll":
917
for arg in cn.getElementsByTagName("arg"):
918
if (arg.getAttribute("direction")
919
== "out"):
920
arg.setAttribute("name", "props")
921
xmlstring = document.toxml("utf-8")
922
document.unlink()
923
except (AttributeError, xml.dom.DOMException,
924
xml.parsers.expat.ExpatError) as error:
925
logger.error("Failed to override Introspection method",
926
error)
927
return xmlstring
928
929
930
def datetime_to_dbus (dt, variant_level=0):
931
"""Convert a UTC datetime.datetime() to a D-Bus type."""
932
if dt is None:
933
return dbus.String("", variant_level = variant_level)
934
return dbus.String(dt.isoformat(),
935
variant_level=variant_level)
936
937
938
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
939
.__metaclass__):
940
"""Applied to an empty subclass of a D-Bus object, this metaclass
941
will add additional D-Bus attributes matching a certain pattern.
942
"""
943
def __new__(mcs, name, bases, attr):
944
# Go through all the base classes which could have D-Bus
945
# methods, signals, or properties in them
946
for base in (b for b in bases
947
if issubclass(b, dbus.service.Object)):
948
# Go though all attributes of the base class
949
for attrname, attribute in inspect.getmembers(base):
950
# Ignore non-D-Bus attributes, and D-Bus attributes
951
# with the wrong interface name
952
if (not hasattr(attribute, "_dbus_interface")
953
or not attribute._dbus_interface
954
.startswith("se.recompile.Mandos")):
955
continue
956
# Create an alternate D-Bus interface name based on
957
# the current name
958
alt_interface = (attribute._dbus_interface
959
.replace("se.recompile.Mandos",
960
"se.bsnet.fukt.Mandos"))
961
# Is this a D-Bus signal?
962
if getattr(attribute, "_dbus_is_signal", False):
963
# Extract the original non-method function by
964
# black magic
965
nonmethod_func = (dict(
966
zip(attribute.func_code.co_freevars,
967
attribute.__closure__))["func"]
968
.cell_contents)
969
# Create a new, but exactly alike, function
970
# object, and decorate it to be a new D-Bus signal
971
# with the alternate D-Bus interface name
972
new_function = (dbus.service.signal
973
(alt_interface,
974
attribute._dbus_signature)
975
(types.FunctionType(
976
nonmethod_func.func_code,
977
nonmethod_func.func_globals,
978
nonmethod_func.func_name,
979
nonmethod_func.func_defaults,
980
nonmethod_func.func_closure)))
981
# Define a creator of a function to call both the
982
# old and new functions, so both the old and new
983
# signals gets sent when the function is called
984
def fixscope(func1, func2):
985
"""This function is a scope container to pass
986
func1 and func2 to the "call_both" function
987
outside of its arguments"""
988
def call_both(*args, **kwargs):
989
"""This function will emit two D-Bus
990
signals by calling func1 and func2"""
991
func1(*args, **kwargs)
992
func2(*args, **kwargs)
993
return call_both
994
# Create the "call_both" function and add it to
995
# the class
996
attr[attrname] = fixscope(attribute,
997
new_function)
998
# Is this a D-Bus method?
999
elif getattr(attribute, "_dbus_is_method", False):
1000
# Create a new, but exactly alike, function
1001
# object. Decorate it to be a new D-Bus method
1002
# with the alternate D-Bus interface name. Add it
1003
# to the class.
1004
attr[attrname] = (dbus.service.method
1005
(alt_interface,
1006
attribute._dbus_in_signature,
1007
attribute._dbus_out_signature)
1008
(types.FunctionType
1009
(attribute.func_code,
1010
attribute.func_globals,
1011
attribute.func_name,
1012
attribute.func_defaults,
1013
attribute.func_closure)))
1014
# Is this a D-Bus property?
1015
elif getattr(attribute, "_dbus_is_property", False):
1016
# Create a new, but exactly alike, function
1017
# object, and decorate it to be a new D-Bus
1018
# property with the alternate D-Bus interface
1019
# name. Add it to the class.
1020
attr[attrname] = (dbus_service_property
1021
(alt_interface,
1022
attribute._dbus_signature,
1023
attribute._dbus_access,
1024
attribute
1025
._dbus_get_args_options
1026
["byte_arrays"])
1027
(types.FunctionType
1028
(attribute.func_code,
1029
attribute.func_globals,
1030
attribute.func_name,
1031
attribute.func_defaults,
1032
attribute.func_closure)))
1033
return type.__new__(mcs, name, bases, attr)
1034
1035
1036
class ClientDBus(Client, DBusObjectWithProperties):
433
434
def still_valid(self):
435
"""Has the timeout not yet passed for this client?"""
436
if not getattr(self, u"enabled", False):
437
return False
438
now = datetime.datetime.utcnow()
439
if self.last_checked_ok is None:
440
return now < (self.created + self.timeout)
441
else:
442
return now < (self.last_checked_ok + self.timeout)
443
444
445
class ClientDBus(Client, dbus.service.Object):
1037
446
"""A Client class using D-Bus
1038
447
1039
448
Attributes:
1040
dbus_object_path: dbus.ObjectPath
1041
bus: dbus.SystemBus()
449
dbus_object_path: dbus.ObjectPath ; only set if self.use_dbus
1042
450
"""
1043
1044
runtime_expansions = (Client.runtime_expansions
1045
+ ("dbus_object_path",))
1046
1047
451
# dbus.service.Object doesn't use super(), so we can't either.
1048
452
1049
def __init__(self, bus = None, *args, **kwargs):
1050
self.bus = bus
453
def __init__(self, *args, **kwargs):
1051
454
Client.__init__(self, *args, **kwargs)
1052
455
# Only now, when this client is initialized, can it show up on
1053
456
# the D-Bus
1054
client_object_name = unicode(self.name).translate(
1055
{ord("."): ord("_"),
1056
ord("-"): ord("_")})
1057
457
self.dbus_object_path = (dbus.ObjectPath
1058
("/clients/" + client_object_name))
1059
DBusObjectWithProperties.__init__(self, self.bus,
1060
self.dbus_object_path)
1061
1062
def notifychangeproperty(transform_func,
1063
dbus_name, type_func=lambda x: x,
1064
variant_level=1):
1065
""" Modify a variable so that it's a property which announces
1066
its changes to DBus.
1067
1068
transform_fun: Function that takes a value and a variant_level
1069
and transforms it to a D-Bus type.
1070
dbus_name: D-Bus name of the variable
1071
type_func: Function that transform the value before sending it
1072
to the D-Bus. Default: no transform
1073
variant_level: D-Bus variant level. Default: 1
1074
"""
1075
attrname = "_{0}".format(dbus_name)
1076
def setter(self, value):
1077
if hasattr(self, "dbus_object_path"):
1078
if (not hasattr(self, attrname) or
1079
type_func(getattr(self, attrname, None))
1080
!= type_func(value)):
1081
dbus_value = transform_func(type_func(value),
1082
variant_level
1083
=variant_level)
1084
self.PropertyChanged(dbus.String(dbus_name),
1085
dbus_value)
1086
setattr(self, attrname, value)
1087
1088
return property(lambda self: getattr(self, attrname), setter)
1089
1090
1091
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1092
approvals_pending = notifychangeproperty(dbus.Boolean,
1093
"ApprovalPending",
1094
type_func = bool)
1095
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1096
last_enabled = notifychangeproperty(datetime_to_dbus,
1097
"LastEnabled")
1098
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1099
type_func = lambda checker:
1100
checker is not None)
1101
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1102
"LastCheckedOK")
1103
last_approval_request = notifychangeproperty(
1104
datetime_to_dbus, "LastApprovalRequest")
1105
approved_by_default = notifychangeproperty(dbus.Boolean,
1106
"ApprovedByDefault")
1107
approval_delay = notifychangeproperty(dbus.UInt64,
1108
"ApprovalDelay",
1109
type_func =
1110
timedelta_to_milliseconds)
1111
approval_duration = notifychangeproperty(
1112
dbus.UInt64, "ApprovalDuration",
1113
type_func = timedelta_to_milliseconds)
1114
host = notifychangeproperty(dbus.String, "Host")
1115
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1116
type_func =
1117
timedelta_to_milliseconds)
1118
extended_timeout = notifychangeproperty(
1119
dbus.UInt64, "ExtendedTimeout",
1120
type_func = timedelta_to_milliseconds)
1121
interval = notifychangeproperty(dbus.UInt64,
1122
"Interval",
1123
type_func =
1124
timedelta_to_milliseconds)
1125
checker_command = notifychangeproperty(dbus.String, "Checker")
1126
1127
del notifychangeproperty
458
(u"/clients/"
459
+ self.name.replace(u".", u"_")))
460
dbus.service.Object.__init__(self, bus,
461
self.dbus_object_path)
462
def enable(self):
463
oldstate = getattr(self, u"enabled", False)
464
r = Client.enable(self)
465
if oldstate != self.enabled:
466
# Emit D-Bus signals
467
self.PropertyChanged(dbus.String(u"enabled"),
468
dbus.Boolean(True, variant_level=1))
469
self.PropertyChanged(dbus.String(u"last_enabled"),
470
(_datetime_to_dbus(self.last_enabled,
471
variant_level=1)))
472
return r
473
474
def disable(self, signal = True):
475
oldstate = getattr(self, u"enabled", False)
476
r = Client.disable(self)
477
if signal and oldstate != self.enabled:
478
# Emit D-Bus signal
479
self.PropertyChanged(dbus.String(u"enabled"),
480
dbus.Boolean(False, variant_level=1))
481
return r
1128
482
1129
483
def __del__(self, *args, **kwargs):
1130
484
try:
1131
485
self.remove_from_connection()
1132
486
except LookupError:
1133
487
pass
1134
if hasattr(DBusObjectWithProperties, "__del__"):
1135
DBusObjectWithProperties.__del__(self, *args, **kwargs)
488
if hasattr(dbus.service.Object, u"__del__"):
489
dbus.service.Object.__del__(self, *args, **kwargs)
1136
490
Client.__del__(self, *args, **kwargs)
1137
491
1138
492
def checker_callback(self, pid, condition, command,
1139
493
*args, **kwargs):
1140
494
self.checker_callback_tag = None
1141
495
self.checker = None
496
# Emit D-Bus signal
497
self.PropertyChanged(dbus.String(u"checker_running"),
498
dbus.Boolean(False, variant_level=1))
1142
499
if os.WIFEXITED(condition):
1143
500
exitstatus = os.WEXITSTATUS(condition)
1144
501
# Emit D-Bus signal
1154
511
return Client.checker_callback(self, pid, condition, command,
1155
512
*args, **kwargs)
1156
513
514
def checked_ok(self, *args, **kwargs):
515
r = Client.checked_ok(self, *args, **kwargs)
516
# Emit D-Bus signal
517
self.PropertyChanged(
518
dbus.String(u"last_checked_ok"),
519
(_datetime_to_dbus(self.last_checked_ok,
520
variant_level=1)))
521
return r
522
1157
523
def start_checker(self, *args, **kwargs):
1158
524
old_checker = self.checker
1159
525
if self.checker is not None:
1166
532
and old_checker_pid != self.checker.pid):
1167
533
# Emit D-Bus signal
1168
534
self.CheckerStarted(self.current_checker_command)
1169
return r
1170
1171
def _reset_approved(self):
1172
self.approved = None
1173
return False
1174
1175
def approve(self, value=True):
1176
self.send_changedstate()
1177
self.approved = value
1178
gobject.timeout_add(timedelta_to_milliseconds
1179
(self.approval_duration),
1180
self._reset_approved)
1181
1182
1183
## D-Bus methods, signals & properties
1184
_interface = "se.recompile.Mandos.Client"
1185
1186
## Signals
535
self.PropertyChanged(
536
dbus.String(u"checker_running"),
537
dbus.Boolean(True, variant_level=1))
538
return r
539
540
def stop_checker(self, *args, **kwargs):
541
old_checker = getattr(self, u"checker", None)
542
r = Client.stop_checker(self, *args, **kwargs)
543
if (old_checker is not None
544
and getattr(self, u"checker", None) is None):
545
self.PropertyChanged(dbus.String(u"checker_running"),
546
dbus.Boolean(False, variant_level=1))
547
return r
548
549
## D-Bus methods & signals
550
_interface = u"se.bsnet.fukt.Mandos.Client"
551
552
# CheckedOK - method
553
@dbus.service.method(_interface)
554
def CheckedOK(self):
555
return self.checked_ok()
1187
556
1188
557
# CheckerCompleted - signal
1189
@dbus.service.signal(_interface, signature="nxs")
558
@dbus.service.signal(_interface, signature=u"nxs")
1190
559
def CheckerCompleted(self, exitcode, waitstatus, command):
1191
560
"D-Bus signal"
1192
561
pass
1193
562
1194
563
# CheckerStarted - signal
1195
@dbus.service.signal(_interface, signature="s")
564
@dbus.service.signal(_interface, signature=u"s")
1196
565
def CheckerStarted(self, command):
1197
566
"D-Bus signal"
1198
567
pass
1199
568
569
# GetAllProperties - method
570
@dbus.service.method(_interface, out_signature=u"a{sv}")
571
def GetAllProperties(self):
572
"D-Bus method"
573
return dbus.Dictionary({
574
dbus.String(u"name"):
575
dbus.String(self.name, variant_level=1),
576
dbus.String(u"fingerprint"):
577
dbus.String(self.fingerprint, variant_level=1),
578
dbus.String(u"host"):
579
dbus.String(self.host, variant_level=1),
580
dbus.String(u"created"):
581
_datetime_to_dbus(self.created, variant_level=1),
582
dbus.String(u"last_enabled"):
583
(_datetime_to_dbus(self.last_enabled,
584
variant_level=1)
585
if self.last_enabled is not None
586
else dbus.Boolean(False, variant_level=1)),
587
dbus.String(u"enabled"):
588
dbus.Boolean(self.enabled, variant_level=1),
589
dbus.String(u"last_checked_ok"):
590
(_datetime_to_dbus(self.last_checked_ok,
591
variant_level=1)
592
if self.last_checked_ok is not None
593
else dbus.Boolean (False, variant_level=1)),
594
dbus.String(u"timeout"):
595
dbus.UInt64(self.timeout_milliseconds(),
596
variant_level=1),
597
dbus.String(u"interval"):
598
dbus.UInt64(self.interval_milliseconds(),
599
variant_level=1),
600
dbus.String(u"checker"):
601
dbus.String(self.checker_command,
602
variant_level=1),
603
dbus.String(u"checker_running"):
604
dbus.Boolean(self.checker is not None,
605
variant_level=1),
606
dbus.String(u"object_path"):
607
dbus.ObjectPath(self.dbus_object_path,
608
variant_level=1)
609
}, signature=u"sv")
610
611
# IsStillValid - method
612
@dbus.service.method(_interface, out_signature=u"b")
613
def IsStillValid(self):
614
return self.still_valid()
615
1200
616
# PropertyChanged - signal
1201
@dbus.service.signal(_interface, signature="sv")
617
@dbus.service.signal(_interface, signature=u"sv")
1202
618
def PropertyChanged(self, property, value):
1203
619
"D-Bus signal"
1204
620
pass
1205
621
1206
# GotSecret - signal
622
# ReceivedSecret - signal
1207
623
@dbus.service.signal(_interface)
1208
def GotSecret(self):
1209
"""D-Bus signal
1210
Is sent after a successful transfer of secret from the Mandos
1211
server to mandos-client
1212
"""
624
def ReceivedSecret(self):
625
"D-Bus signal"
1213
626
pass
1214
627
1215
628
# Rejected - signal
1216
@dbus.service.signal(_interface, signature="s")
1217
def Rejected(self, reason):
629
@dbus.service.signal(_interface)
630
def Rejected(self):
1218
631
"D-Bus signal"
1219
632
pass
1220
633
1221
# NeedApproval - signal
1222
@dbus.service.signal(_interface, signature="tb")
1223
def NeedApproval(self, timeout, default):
1224
"D-Bus signal"
1225
return self.need_approval()
1226
1227
## Methods
1228
1229
# Approve - method
1230
@dbus.service.method(_interface, in_signature="b")
1231
def Approve(self, value):
1232
self.approve(value)
1233
1234
# CheckedOK - method
1235
@dbus.service.method(_interface)
1236
def CheckedOK(self):
1237
self.checked_ok()
634
# SetChecker - method
635
@dbus.service.method(_interface, in_signature=u"s")
636
def SetChecker(self, checker):
637
"D-Bus setter method"
638
self.checker_command = checker
639
# Emit D-Bus signal
640
self.PropertyChanged(dbus.String(u"checker"),
641
dbus.String(self.checker_command,
642
variant_level=1))
643
644
# SetHost - method
645
@dbus.service.method(_interface, in_signature=u"s")
646
def SetHost(self, host):
647
"D-Bus setter method"
648
self.host = host
649
# Emit D-Bus signal
650
self.PropertyChanged(dbus.String(u"host"),
651
dbus.String(self.host, variant_level=1))
652
653
# SetInterval - method
654
@dbus.service.method(_interface, in_signature=u"t")
655
def SetInterval(self, milliseconds):
656
self.interval = datetime.timedelta(0, 0, 0, milliseconds)
657
# Emit D-Bus signal
658
self.PropertyChanged(dbus.String(u"interval"),
659
(dbus.UInt64(self.interval_milliseconds(),
660
variant_level=1)))
661
662
# SetSecret - method
663
@dbus.service.method(_interface, in_signature=u"ay",
664
byte_arrays=True)
665
def SetSecret(self, secret):
666
"D-Bus setter method"
667
self.secret = str(secret)
668
669
# SetTimeout - method
670
@dbus.service.method(_interface, in_signature=u"t")
671
def SetTimeout(self, milliseconds):
672
self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
673
# Emit D-Bus signal
674
self.PropertyChanged(dbus.String(u"timeout"),
675
(dbus.UInt64(self.timeout_milliseconds(),
676
variant_level=1)))
1238
677
1239
678
# Enable - method
1240
679
@dbus.service.method(_interface)
1259
698
def StopChecker(self):
1260
699
self.stop_checker()
1261
700
1262
## Properties
1263
1264
# ApprovalPending - property
1265
@dbus_service_property(_interface, signature="b", access="read")
1266
def ApprovalPending_dbus_property(self):
1267
return dbus.Boolean(bool(self.approvals_pending))
1268
1269
# ApprovedByDefault - property
1270
@dbus_service_property(_interface, signature="b",
1271
access="readwrite")
1272
def ApprovedByDefault_dbus_property(self, value=None):
1273
if value is None: # get
1274
return dbus.Boolean(self.approved_by_default)
1275
self.approved_by_default = bool(value)
1276
1277
# ApprovalDelay - property
1278
@dbus_service_property(_interface, signature="t",
1279
access="readwrite")
1280
def ApprovalDelay_dbus_property(self, value=None):
1281
if value is None: # get
1282
return dbus.UInt64(self.approval_delay_milliseconds())
1283
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1284
1285
# ApprovalDuration - property
1286
@dbus_service_property(_interface, signature="t",
1287
access="readwrite")
1288
def ApprovalDuration_dbus_property(self, value=None):
1289
if value is None: # get
1290
return dbus.UInt64(timedelta_to_milliseconds(
1291
self.approval_duration))
1292
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1293
1294
# Name - property
1295
@dbus_service_property(_interface, signature="s", access="read")
1296
def Name_dbus_property(self):
1297
return dbus.String(self.name)
1298
1299
# Fingerprint - property
1300
@dbus_service_property(_interface, signature="s", access="read")
1301
def Fingerprint_dbus_property(self):
1302
return dbus.String(self.fingerprint)
1303
1304
# Host - property
1305
@dbus_service_property(_interface, signature="s",
1306
access="readwrite")
1307
def Host_dbus_property(self, value=None):
1308
if value is None: # get
1309
return dbus.String(self.host)
1310
self.host = unicode(value)
1311
1312
# Created - property
1313
@dbus_service_property(_interface, signature="s", access="read")
1314
def Created_dbus_property(self):
1315
return datetime_to_dbus(self.created)
1316
1317
# LastEnabled - property
1318
@dbus_service_property(_interface, signature="s", access="read")
1319
def LastEnabled_dbus_property(self):
1320
return datetime_to_dbus(self.last_enabled)
1321
1322
# Enabled - property
1323
@dbus_service_property(_interface, signature="b",
1324
access="readwrite")
1325
def Enabled_dbus_property(self, value=None):
1326
if value is None: # get
1327
return dbus.Boolean(self.enabled)
1328
if value:
1329
self.enable()
1330
else:
1331
self.disable()
1332
1333
# LastCheckedOK - property
1334
@dbus_service_property(_interface, signature="s",
1335
access="readwrite")
1336
def LastCheckedOK_dbus_property(self, value=None):
1337
if value is not None:
1338
self.checked_ok()
1339
return
1340
return datetime_to_dbus(self.last_checked_ok)
1341
1342
# Expires - property
1343
@dbus_service_property(_interface, signature="s", access="read")
1344
def Expires_dbus_property(self):
1345
return datetime_to_dbus(self.expires)
1346
1347
# LastApprovalRequest - property
1348
@dbus_service_property(_interface, signature="s", access="read")
1349
def LastApprovalRequest_dbus_property(self):
1350
return datetime_to_dbus(self.last_approval_request)
1351
1352
# Timeout - property
1353
@dbus_service_property(_interface, signature="t",
1354
access="readwrite")
1355
def Timeout_dbus_property(self, value=None):
1356
if value is None: # get
1357
return dbus.UInt64(self.timeout_milliseconds())
1358
self.timeout = datetime.timedelta(0, 0, 0, value)
1359
# Reschedule timeout
1360
if self.enabled:
1361
now = datetime.datetime.utcnow()
1362
time_to_die = timedelta_to_milliseconds(
1363
(self.last_checked_ok + self.timeout) - now)
1364
if time_to_die <= 0:
1365
# The timeout has passed
1366
self.disable()
1367
else:
1368
self.expires = (now +
1369
datetime.timedelta(milliseconds =
1370
time_to_die))
1371
if (getattr(self, "disable_initiator_tag", None)
1372
is None):
1373
return
1374
gobject.source_remove(self.disable_initiator_tag)
1375
self.disable_initiator_tag = (gobject.timeout_add
1376
(time_to_die,
1377
self.disable))
1378
1379
# ExtendedTimeout - property
1380
@dbus_service_property(_interface, signature="t",
1381
access="readwrite")
1382
def ExtendedTimeout_dbus_property(self, value=None):
1383
if value is None: # get
1384
return dbus.UInt64(self.extended_timeout_milliseconds())
1385
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1386
1387
# Interval - property
1388
@dbus_service_property(_interface, signature="t",
1389
access="readwrite")
1390
def Interval_dbus_property(self, value=None):
1391
if value is None: # get
1392
return dbus.UInt64(self.interval_milliseconds())
1393
self.interval = datetime.timedelta(0, 0, 0, value)
1394
if getattr(self, "checker_initiator_tag", None) is None:
1395
return
1396
if self.enabled:
1397
# Reschedule checker run
1398
gobject.source_remove(self.checker_initiator_tag)
1399
self.checker_initiator_tag = (gobject.timeout_add
1400
(value, self.start_checker))
1401
self.start_checker() # Start one now, too
1402
1403
# Checker - property
1404
@dbus_service_property(_interface, signature="s",
1405
access="readwrite")
1406
def Checker_dbus_property(self, value=None):
1407
if value is None: # get
1408
return dbus.String(self.checker_command)
1409
self.checker_command = unicode(value)
1410
1411
# CheckerRunning - property
1412
@dbus_service_property(_interface, signature="b",
1413
access="readwrite")
1414
def CheckerRunning_dbus_property(self, value=None):
1415
if value is None: # get
1416
return dbus.Boolean(self.checker is not None)
1417
if value:
1418
self.start_checker()
1419
else:
1420
self.stop_checker()
1421
1422
# ObjectPath - property
1423
@dbus_service_property(_interface, signature="o", access="read")
1424
def ObjectPath_dbus_property(self):
1425
return self.dbus_object_path # is already a dbus.ObjectPath
1426
1427
# Secret = property
1428
@dbus_service_property(_interface, signature="ay",
1429
access="write", byte_arrays=True)
1430
def Secret_dbus_property(self, value):
1431
self.secret = str(value)
1432
1433
701
del _interface
1434
702
1435
703
1436
class ProxyClient(object):
1437
def __init__(self, child_pipe, fpr, address):
1438
self._pipe = child_pipe
1439
self._pipe.send(('init', fpr, address))
1440
if not self._pipe.recv():
1441
raise KeyError()
1442
1443
def __getattribute__(self, name):
1444
if name == '_pipe':
1445
return super(ProxyClient, self).__getattribute__(name)
1446
self._pipe.send(('getattr', name))
1447
data = self._pipe.recv()
1448
if data[0] == 'data':
1449
return data[1]
1450
if data[0] == 'function':
1451
def func(*args, **kwargs):
1452
self._pipe.send(('funcall', name, args, kwargs))
1453
return self._pipe.recv()[1]
1454
return func
1455
1456
def __setattr__(self, name, value):
1457
if name == '_pipe':
1458
return super(ProxyClient, self).__setattr__(name, value)
1459
self._pipe.send(('setattr', name, value))
1460
1461
1462
class ClientDBusTransitional(ClientDBus):
1463
__metaclass__ = AlternateDBusNamesMetaclass
1464
1465
1466
704
class ClientHandler(socketserver.BaseRequestHandler, object):
1467
705
"""A class to handle client connections.
1468
706
1470
708
Note: This will run in its own forked process."""
1471
709
1472
710
def handle(self):
1473
with contextlib.closing(self.server.child_pipe) as child_pipe:
1474
logger.info("TCP connection from: %s",
1475
unicode(self.client_address))
1476
logger.debug("Pipe FD: %d",
1477
self.server.child_pipe.fileno())
1478
711
logger.info(u"TCP connection from: %s",
712
unicode(self.client_address))
713
logger.debug(u"IPC Pipe FD: %d", self.server.pipe[1])
714
# Open IPC pipe to parent process
715
with closing(os.fdopen(self.server.pipe[1], u"w", 1)) as ipc:
1479
716
session = (gnutls.connection
1480
717
.ClientSession(self.request,
1481
718
gnutls.connection
1482
719
.X509Credentials()))
1483
720
721
line = self.request.makefile().readline()
722
logger.debug(u"Protocol version: %r", line)
723
try:
724
if int(line.strip().split()[0]) > 1:
725
raise RuntimeError
726
except (ValueError, IndexError, RuntimeError), error:
727
logger.error(u"Unknown protocol version: %s", error)
728
return
729
1484
730
# Note: gnutls.connection.X509Credentials is really a
1485
731
# generic GnuTLS certificate credentials object so long as
1486
732
# no X.509 keys are added to it. Therefore, we can use it
1487
733
# here despite using OpenPGP certificates.
1488
734
1489
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1490
# "+AES-256-CBC", "+SHA1",
1491
# "+COMP-NULL", "+CTYPE-OPENPGP",
1492
# "+DHE-DSS"))
735
#priority = u':'.join((u"NONE", u"+VERS-TLS1.1",
736
# u"+AES-256-CBC", u"+SHA1",
737
# u"+COMP-NULL", u"+CTYPE-OPENPGP",
738
# u"+DHE-DSS"))
1493
739
# Use a fallback default, since this MUST be set.
1494
740
priority = self.server.gnutls_priority
1495
741
if priority is None:
1496
priority = "NORMAL"
742
priority = u"NORMAL"
1497
743
(gnutls.library.functions
1498
744
.gnutls_priority_set_direct(session._c_object,
1499
745
priority, None))
1500
746
1501
# Start communication using the Mandos protocol
1502
# Get protocol number
1503
line = self.request.makefile().readline()
1504
logger.debug("Protocol version: %r", line)
1505
try:
1506
if int(line.strip().split()[0]) > 1:
1507
raise RuntimeError
1508
except (ValueError, IndexError, RuntimeError) as error:
1509
logger.error("Unknown protocol version: %s", error)
1510
return
1511
1512
# Start GnuTLS connection
1513
747
try:
1514
748
session.handshake()
1515
except gnutls.errors.GNUTLSError as error:
1516
logger.warning("Handshake failed: %s", error)
749
except gnutls.errors.GNUTLSError, error:
750
logger.warning(u"Handshake failed: %s", error)
1517
751
# Do not run session.bye() here: the session is not
1518
752
# established. Just abandon the request.
1519
753
return
1520
logger.debug("Handshake succeeded")
1521
1522
approval_required = False
754
logger.debug(u"Handshake succeeded")
1523
755
try:
1524
try:
1525
fpr = self.fingerprint(self.peer_certificate
1526
(session))
1527
except (TypeError,
1528
gnutls.errors.GNUTLSError) as error:
1529
logger.warning("Bad certificate: %s", error)
1530
return
1531
logger.debug("Fingerprint: %s", fpr)
1532
1533
try:
1534
client = ProxyClient(child_pipe, fpr,
1535
self.client_address)
1536
except KeyError:
1537
return
1538
1539
if client.approval_delay:
1540
delay = client.approval_delay
1541
client.approvals_pending += 1
1542
approval_required = True
1543
1544
while True:
1545
if not client.enabled:
1546
logger.info("Client %s is disabled",
1547
client.name)
1548
if self.server.use_dbus:
1549
# Emit D-Bus signal
1550
client.Rejected("Disabled")
1551
return
1552
1553
if client.approved or not client.approval_delay:
1554
#We are approved or approval is disabled
1555
break
1556
elif client.approved is None:
1557
logger.info("Client %s needs approval",
1558
client.name)
1559
if self.server.use_dbus:
1560
# Emit D-Bus signal
1561
client.NeedApproval(
1562
client.approval_delay_milliseconds(),
1563
client.approved_by_default)
1564
else:
1565
logger.warning("Client %s was not approved",
1566
client.name)
1567
if self.server.use_dbus:
1568
# Emit D-Bus signal
1569
client.Rejected("Denied")
1570
return
1571
1572
#wait until timeout or approved
1573
time = datetime.datetime.now()
1574
client.changedstate.acquire()
1575
(client.changedstate.wait
1576
(float(client.timedelta_to_milliseconds(delay)
1577
/ 1000)))
1578
client.changedstate.release()
1579
time2 = datetime.datetime.now()
1580
if (time2 - time) >= delay:
1581
if not client.approved_by_default:
1582
logger.warning("Client %s timed out while"
1583
" waiting for approval",
1584
client.name)
1585
if self.server.use_dbus:
1586
# Emit D-Bus signal
1587
client.Rejected("Approval timed out")
1588
return
1589
else:
1590
break
1591
else:
1592
delay -= time2 - time
1593
1594
sent_size = 0
1595
while sent_size < len(client.secret):
1596
try:
1597
sent = session.send(client.secret[sent_size:])
1598
except gnutls.errors.GNUTLSError as error:
1599
logger.warning("gnutls send failed")
1600
return
1601
logger.debug("Sent: %d, remaining: %d",
1602
sent, len(client.secret)
1603
- (sent_size + sent))
1604
sent_size += sent
1605
1606
logger.info("Sending secret to %s", client.name)
1607
# bump the timeout using extended_timeout
1608
client.checked_ok(client.extended_timeout)
1609
if self.server.use_dbus:
1610
# Emit D-Bus signal
1611
client.GotSecret()
756
fpr = self.fingerprint(self.peer_certificate(session))
757
except (TypeError, gnutls.errors.GNUTLSError), error:
758
logger.warning(u"Bad certificate: %s", error)
759
session.bye()
760
return
761
logger.debug(u"Fingerprint: %s", fpr)
1612
762
1613
finally:
1614
if approval_required:
1615
client.approvals_pending -= 1
1616
try:
1617
session.bye()
1618
except gnutls.errors.GNUTLSError as error:
1619
logger.warning("GnuTLS bye failed")
763
for c in self.server.clients:
764
if c.fingerprint == fpr:
765
client = c
766
break
767
else:
768
ipc.write(u"NOTFOUND %s\n" % fpr)
769
session.bye()
770
return
771
# Have to check if client.still_valid(), since it is
772
# possible that the client timed out while establishing
773
# the GnuTLS session.
774
if not client.still_valid():
775
ipc.write(u"INVALID %s\n" % client.name)
776
session.bye()
777
return
778
ipc.write(u"SENDING %s\n" % client.name)
779
sent_size = 0
780
while sent_size < len(client.secret):
781
sent = session.send(client.secret[sent_size:])
782
logger.debug(u"Sent: %d, remaining: %d",
783
sent, len(client.secret)
784
- (sent_size + sent))
785
sent_size += sent
786
session.bye()
1620
787
1621
788
@staticmethod
1622
789
def peer_certificate(session):
1632
799
.gnutls_certificate_get_peers
1633
800
(session._c_object, ctypes.byref(list_size)))
1634
801
if not bool(cert_list) and list_size.value != 0:
1635
raise gnutls.errors.GNUTLSError("error getting peer"
1636
" certificate")
802
raise gnutls.errors.GNUTLSError(u"error getting peer"
803
u" certificate")
1637
804
if list_size.value == 0:
1638
805
return None
1639
806
cert = cert_list[0]
1665
832
if crtverify.value != 0:
1666
833
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1667
834
raise (gnutls.errors.CertificateSecurityError
1668
("Verify failed"))
835
(u"Verify failed"))
1669
836
# New buffer for the fingerprint
1670
837
buf = ctypes.create_string_buffer(20)
1671
838
buf_len = ctypes.c_size_t()
1678
845
# Convert the buffer to a Python bytestring
1679
846
fpr = ctypes.string_at(buf, buf_len.value)
1680
847
# Convert the bytestring to hexadecimal notation
1681
hex_fpr = binascii.hexlify(fpr).upper()
848
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
1682
849
return hex_fpr
1683
850
1684
851
1685
class MultiprocessingMixIn(object):
1686
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1687
def sub_process_main(self, request, address):
1688
try:
1689
self.finish_request(request, address)
1690
except Exception:
1691
self.handle_error(request, address)
1692
self.close_request(request)
852
class ForkingMixInWithPipe(socketserver.ForkingMixIn, object):
853
"""Like socketserver.ForkingMixIn, but also pass a pipe.
1693
854
1694
def process_request(self, request, address):
1695
"""Start a new process to process the request."""
1696
proc = multiprocessing.Process(target = self.sub_process_main,
1697
args = (request,
1698
address))
1699
proc.start()
1700
return proc
1701
1702
1703
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1704
""" adds a pipe to the MixIn """
855
Assumes a gobject.MainLoop event loop.
856
"""
1705
857
def process_request(self, request, client_address):
1706
858
"""Overrides and wraps the original process_request().
1707
859
1708
This function creates a new pipe in self.pipe
860
This function creates a new pipe in self.pipe
1709
861
"""
1710
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1711
1712
proc = MultiprocessingMixIn.process_request(self, request,
1713
client_address)
1714
self.child_pipe.close()
1715
self.add_pipe(parent_pipe, proc)
1716
1717
def add_pipe(self, parent_pipe, proc):
862
self.pipe = os.pipe()
863
super(ForkingMixInWithPipe,
864
self).process_request(request, client_address)
865
os.close(self.pipe[1]) # close write end
866
# Call "handle_ipc" for both data and EOF events
867
gobject.io_add_watch(self.pipe[0],
868
gobject.IO_IN | gobject.IO_HUP,
869
self.handle_ipc)
870
def handle_ipc(source, condition):
1718
871
"""Dummy function; override as necessary"""
1719
raise NotImplementedError
1720
1721
1722
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
872
os.close(source)
873
return False
874
875
876
class IPv6_TCPServer(ForkingMixInWithPipe,
1723
877
socketserver.TCPServer, object):
1724
878
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1725
879
1727
881
enabled: Boolean; whether this server is activated yet
1728
882
interface: None or a network interface name (string)
1729
883
use_ipv6: Boolean; to use IPv6 or not
884
----
885
clients: set of Client objects
886
gnutls_priority GnuTLS priority string
887
use_dbus: Boolean; to emit D-Bus signals or not
1730
888
"""
1731
889
def __init__(self, server_address, RequestHandlerClass,
1732
interface=None, use_ipv6=True):
890
interface=None, use_ipv6=True, clients=None,
891
gnutls_priority=None, use_dbus=True):
892
self.enabled = False
1733
893
self.interface = interface
1734
894
if use_ipv6:
1735
895
self.address_family = socket.AF_INET6
896
self.clients = clients
897
self.use_dbus = use_dbus
898
self.gnutls_priority = gnutls_priority
1736
899
socketserver.TCPServer.__init__(self, server_address,
1737
900
RequestHandlerClass)
1738
901
def server_bind(self):
1740
903
to bind to an interface if one was specified, and also NOT to
1741
904
bind to an address or port if they were not specified."""
1742
905
if self.interface is not None:
1743
if SO_BINDTODEVICE is None:
1744
logger.error("SO_BINDTODEVICE does not exist;"
1745
" cannot bind to interface %s",
1746
self.interface)
1747
else:
1748
try:
1749
self.socket.setsockopt(socket.SOL_SOCKET,
1750
SO_BINDTODEVICE,
1751
str(self.interface
1752
+ '\0'))
1753
except socket.error as error:
1754
if error[0] == errno.EPERM:
1755
logger.error("No permission to"
1756
" bind to interface %s",
1757
self.interface)
1758
elif error[0] == errno.ENOPROTOOPT:
1759
logger.error("SO_BINDTODEVICE not available;"
1760
" cannot bind to interface %s",
1761
self.interface)
1762
else:
1763
raise
906
try:
907
self.socket.setsockopt(socket.SOL_SOCKET,
908
SO_BINDTODEVICE,
909
str(self.interface + u'\0'))
910
except socket.error, error:
911
if error[0] == errno.EPERM:
912
logger.error(u"No permission to"
913
u" bind to interface %s",
914
self.interface)
915
else:
916
raise
1764
917
# Only bind(2) the socket if we really need to.
1765
918
if self.server_address[0] or self.server_address[1]:
1766
919
if not self.server_address[0]:
1767
920
if self.address_family == socket.AF_INET6:
1768
any_address = "::" # in6addr_any
921
any_address = u"::" # in6addr_any
1769
922
else:
1770
923
any_address = socket.INADDR_ANY
1771
924
self.server_address = (any_address,
1780
933
# if_nametoindex
1781
934
# (self.interface))
1782
935
return socketserver.TCPServer.server_bind(self)
1783
1784
1785
class MandosServer(IPv6_TCPServer):
1786
"""Mandos server.
1787
1788
Attributes:
1789
clients: set of Client objects
1790
gnutls_priority GnuTLS priority string
1791
use_dbus: Boolean; to emit D-Bus signals or not
1792
1793
Assumes a gobject.MainLoop event loop.
1794
"""
1795
def __init__(self, server_address, RequestHandlerClass,
1796
interface=None, use_ipv6=True, clients=None,
1797
gnutls_priority=None, use_dbus=True):
1798
self.enabled = False
1799
self.clients = clients
1800
if self.clients is None:
1801
self.clients = {}
1802
self.use_dbus = use_dbus
1803
self.gnutls_priority = gnutls_priority
1804
IPv6_TCPServer.__init__(self, server_address,
1805
RequestHandlerClass,
1806
interface = interface,
1807
use_ipv6 = use_ipv6)
1808
936
def server_activate(self):
1809
937
if self.enabled:
1810
938
return socketserver.TCPServer.server_activate(self)
1811
1812
939
def enable(self):
1813
940
self.enabled = True
1814
1815
def add_pipe(self, parent_pipe, proc):
1816
# Call "handle_ipc" for both data and EOF events
1817
gobject.io_add_watch(parent_pipe.fileno(),
1818
gobject.IO_IN | gobject.IO_HUP,
1819
functools.partial(self.handle_ipc,
1820
parent_pipe =
1821
parent_pipe,
1822
proc = proc))
1823
1824
def handle_ipc(self, source, condition, parent_pipe=None,
1825
proc = None, client_object=None):
941
def handle_ipc(self, source, condition, file_objects={}):
1826
942
condition_names = {
1827
gobject.IO_IN: "IN", # There is data to read.
1828
gobject.IO_OUT: "OUT", # Data can be written (without
943
gobject.IO_IN: u"IN", # There is data to read.
944
gobject.IO_OUT: u"OUT", # Data can be written (without
1829
945
# blocking).
1830
gobject.IO_PRI: "PRI", # There is urgent data to read.
1831
gobject.IO_ERR: "ERR", # Error condition.
1832
gobject.IO_HUP: "HUP" # Hung up (the connection has been
946
gobject.IO_PRI: u"PRI", # There is urgent data to read.
947
gobject.IO_ERR: u"ERR", # Error condition.
948
gobject.IO_HUP: u"HUP" # Hung up (the connection has been
1833
949
# broken, usually for pipes and
1834
950
# sockets).
1835
951
}
1837
953
for cond, name in
1838
954
condition_names.iteritems()
1839
955
if cond & condition)
1840
# error, or the other end of multiprocessing.Pipe has closed
1841
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
1842
# Wait for other process to exit
1843
proc.join()
1844
return False
1845
1846
# Read a request from the child
1847
request = parent_pipe.recv()
1848
command = request[0]
1849
1850
if command == 'init':
1851
fpr = request[1]
1852
address = request[2]
1853
1854
for c in self.clients.itervalues():
1855
if c.fingerprint == fpr:
1856
client = c
1857
break
1858
else:
1859
logger.info("Client not found for fingerprint: %s, ad"
1860
"dress: %s", fpr, address)
1861
if self.use_dbus:
1862
# Emit D-Bus signal
1863
mandos_dbus_service.ClientNotFound(fpr,
1864
address[0])
1865
parent_pipe.send(False)
1866
return False
1867
1868
gobject.io_add_watch(parent_pipe.fileno(),
1869
gobject.IO_IN | gobject.IO_HUP,
1870
functools.partial(self.handle_ipc,
1871
parent_pipe =
1872
parent_pipe,
1873
proc = proc,
1874
client_object =
1875
client))
1876
parent_pipe.send(True)
1877
# remove the old hook in favor of the new above hook on
1878
# same fileno
1879
return False
1880
if command == 'funcall':
1881
funcname = request[1]
1882
args = request[2]
1883
kwargs = request[3]
1884
1885
parent_pipe.send(('data', getattr(client_object,
1886
funcname)(*args,
1887
**kwargs)))
1888
1889
if command == 'getattr':
1890
attrname = request[1]
1891
if callable(client_object.__getattribute__(attrname)):
1892
parent_pipe.send(('function',))
1893
else:
1894
parent_pipe.send(('data', client_object
1895
.__getattribute__(attrname)))
1896
1897
if command == 'setattr':
1898
attrname = request[1]
1899
value = request[2]
1900
setattr(client_object, attrname, value)
1901
956
logger.debug(u"Handling IPC: FD = %d, condition = %s", source,
957
conditions_string)
958
959
# Turn the pipe file descriptor into a Python file object
960
if source not in file_objects:
961
file_objects[source] = os.fdopen(source, u"r", 1)
962
963
# Read a line from the file object
964
cmdline = file_objects[source].readline()
965
if not cmdline: # Empty line means end of file
966
# close the IPC pipe
967
file_objects[source].close()
968
del file_objects[source]
969
970
# Stop calling this function
971
return False
972
973
logger.debug(u"IPC command: %r", cmdline)
974
975
# Parse and act on command
976
cmd, args = cmdline.rstrip(u"\r\n").split(None, 1)
977
978
if cmd == u"NOTFOUND":
979
logger.warning(u"Client not found for fingerprint: %s",
980
args)
981
if self.use_dbus:
982
# Emit D-Bus signal
983
mandos_dbus_service.ClientNotFound(args)
984
elif cmd == u"INVALID":
985
for client in self.clients:
986
if client.name == args:
987
logger.warning(u"Client %s is invalid", args)
988
if self.use_dbus:
989
# Emit D-Bus signal
990
client.Rejected()
991
break
992
else:
993
logger.error(u"Unknown client %s is invalid", args)
994
elif cmd == u"SENDING":
995
for client in self.clients:
996
if client.name == args:
997
logger.info(u"Sending secret to %s", client.name)
998
client.checked_ok()
999
if self.use_dbus:
1000
# Emit D-Bus signal
1001
client.ReceivedSecret()
1002
break
1003
else:
1004
logger.error(u"Sending secret to unknown client %s",
1005
args)
1006
else:
1007
logger.error(u"Unknown IPC command: %r", cmdline)
1008
1009
# Keep calling this function
1902
1010
return True
1903
1011
1904
1012
1905
1013
def string_to_delta(interval):
1906
1014
"""Parse a string and return a datetime.timedelta
1907
1015
1908
>>> string_to_delta('7d')
1016
>>> string_to_delta(u'7d')
1909
1017
datetime.timedelta(7)
1910
>>> string_to_delta('60s')
1018
>>> string_to_delta(u'60s')
1911
1019
datetime.timedelta(0, 60)
1912
>>> string_to_delta('60m')
1020
>>> string_to_delta(u'60m')
1913
1021
datetime.timedelta(0, 3600)
1914
>>> string_to_delta('24h')
1022
>>> string_to_delta(u'24h')
1915
1023
datetime.timedelta(1)
1916
>>> string_to_delta('1w')
1024
>>> string_to_delta(u'1w')
1917
1025
datetime.timedelta(7)
1918
>>> string_to_delta('5m 30s')
1026
>>> string_to_delta(u'5m 30s')
1919
1027
datetime.timedelta(0, 330)
1920
1028
"""
1921
1029
timevalue = datetime.timedelta(0)
1923
1031
try:
1924
1032
suffix = unicode(s[-1])
1925
1033
value = int(s[:-1])
1926
if suffix == "d":
1034
if suffix == u"d":
1927
1035
delta = datetime.timedelta(value)
1928
elif suffix == "s":
1036
elif suffix == u"s":
1929
1037
delta = datetime.timedelta(0, value)
1930
elif suffix == "m":
1038
elif suffix == u"m":
1931
1039
delta = datetime.timedelta(0, 0, 0, 0, value)
1932
elif suffix == "h":
1040
elif suffix == u"h":
1933
1041
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
1934
elif suffix == "w":
1042
elif suffix == u"w":
1935
1043
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1936
1044
else:
1937
raise ValueError("Unknown suffix %r" % suffix)
1938
except (ValueError, IndexError) as e:
1939
raise ValueError(*(e.args))
1045
raise ValueError
1046
except (ValueError, IndexError):
1047
raise ValueError
1940
1048
timevalue += delta
1941
1049
return timevalue
1942
1050
1943
1051
1052
def server_state_changed(state):
1053
"""Derived from the Avahi example code"""
1054
if state == avahi.SERVER_COLLISION:
1055
logger.error(u"Zeroconf server name collision")
1056
service.remove()
1057
elif state == avahi.SERVER_RUNNING:
1058
service.add()
1059
1060
1061
def entry_group_state_changed(state, error):
1062
"""Derived from the Avahi example code"""
1063
logger.debug(u"Avahi state change: %i", state)
1064
1065
if state == avahi.ENTRY_GROUP_ESTABLISHED:
1066
logger.debug(u"Zeroconf service established.")
1067
elif state == avahi.ENTRY_GROUP_COLLISION:
1068
logger.warning(u"Zeroconf service name collision.")
1069
service.rename()
1070
elif state == avahi.ENTRY_GROUP_FAILURE:
1071
logger.critical(u"Avahi: Error in group state changed %s",
1072
unicode(error))
1073
raise AvahiGroupError(u"State changed: %s" % unicode(error))
1074
1075
def if_nametoindex(interface):
1076
"""Call the C function if_nametoindex(), or equivalent
1077
1078
Note: This function cannot accept a unicode string."""
1079
global if_nametoindex
1080
try:
1081
if_nametoindex = (ctypes.cdll.LoadLibrary
1082
(ctypes.util.find_library(u"c"))
1083
.if_nametoindex)
1084
except (OSError, AttributeError):
1085
logger.warning(u"Doing if_nametoindex the hard way")
1086
def if_nametoindex(interface):
1087
"Get an interface index the hard way, i.e. using fcntl()"
1088
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
1089
with closing(socket.socket()) as s:
1090
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1091
struct.pack(str(u"16s16x"),
1092
interface))
1093
interface_index = struct.unpack(str(u"I"),
1094
ifreq[16:20])[0]
1095
return interface_index
1096
return if_nametoindex(interface)
1097
1098
1944
1099
def daemon(nochdir = False, noclose = False):
1945
1100
"""See daemon(3). Standard BSD Unix function.
1946
1101
1949
1104
sys.exit()
1950
1105
os.setsid()
1951
1106
if not nochdir:
1952
os.chdir("/")
1107
os.chdir(u"/")
1953
1108
if os.fork():
1954
1109
sys.exit()
1955
1110
if not noclose:
1957
1112
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1958
1113
if not stat.S_ISCHR(os.fstat(null).st_mode):
1959
1114
raise OSError(errno.ENODEV,
1960
"%s not a character device"
1961
% os.path.devnull)
1115
u"/dev/null not a character device")
1962
1116
os.dup2(null, sys.stdin.fileno())
1963
1117
os.dup2(null, sys.stdout.fileno())
1964
1118
os.dup2(null, sys.stderr.fileno())
1968
1122
1969
1123
def main():
1970
1124
1971
##################################################################
1125
######################################################################
1972
1126
# Parsing of options, both command line and config file
1973
1127
1974
parser = argparse.ArgumentParser()
1975
parser.add_argument("-v", "--version", action="version",
1976
version = "%%(prog)s %s" % version,
1977
help="show version number and exit")
1978
parser.add_argument("-i", "--interface", metavar="IF",
1979
help="Bind to interface IF")
1980
parser.add_argument("-a", "--address",
1981
help="Address to listen for requests on")
1982
parser.add_argument("-p", "--port", type=int,
1983
help="Port number to receive requests on")
1984
parser.add_argument("--check", action="store_true",
1985
help="Run self-test")
1986
parser.add_argument("--debug", action="store_true",
1987
help="Debug mode; run in foreground and log"
1988
" to terminal")
1989
parser.add_argument("--debuglevel", metavar="LEVEL",
1990
help="Debug level for stdout output")
1991
parser.add_argument("--priority", help="GnuTLS"
1992
" priority string (see GnuTLS documentation)")
1993
parser.add_argument("--servicename",
1994
metavar="NAME", help="Zeroconf service name")
1995
parser.add_argument("--configdir",
1996
default="/etc/mandos", metavar="DIR",
1997
help="Directory to search for configuration"
1998
" files")
1999
parser.add_argument("--no-dbus", action="store_false",
2000
dest="use_dbus", help="Do not provide D-Bus"
2001
" system bus interface")
2002
parser.add_argument("--no-ipv6", action="store_false",
2003
dest="use_ipv6", help="Do not use IPv6")
2004
parser.add_argument("--no-restore", action="store_false",
2005
dest="restore", help="Do not restore stored"
2006
" state")
2007
parser.add_argument("--statedir", metavar="DIR",
2008
help="Directory to save/restore state in")
2009
2010
options = parser.parse_args()
1128
parser = optparse.OptionParser(version = "%%prog %s" % version)
1129
parser.add_option("-i", u"--interface", type=u"string",
1130
metavar="IF", help=u"Bind to interface IF")
1131
parser.add_option("-a", u"--address", type=u"string",
1132
help=u"Address to listen for requests on")
1133
parser.add_option("-p", u"--port", type=u"int",
1134
help=u"Port number to receive requests on")
1135
parser.add_option("--check", action=u"store_true",
1136
help=u"Run self-test")
1137
parser.add_option("--debug", action=u"store_true",
1138
help=u"Debug mode; run in foreground and log to"
1139
u" terminal")
1140
parser.add_option("--priority", type=u"string", help=u"GnuTLS"
1141
u" priority string (see GnuTLS documentation)")
1142
parser.add_option("--servicename", type=u"string",
1143
metavar=u"NAME", help=u"Zeroconf service name")
1144
parser.add_option("--configdir", type=u"string",
1145
default=u"/etc/mandos", metavar=u"DIR",
1146
help=u"Directory to search for configuration"
1147
u" files")
1148
parser.add_option("--no-dbus", action=u"store_false",
1149
dest=u"use_dbus", help=u"Do not provide D-Bus"
1150
u" system bus interface")
1151
parser.add_option("--no-ipv6", action=u"store_false",
1152
dest=u"use_ipv6", help=u"Do not use IPv6")
1153
options = parser.parse_args()[0]
2011
1154
2012
1155
if options.check:
2013
1156
import doctest
2015
1158
sys.exit()
2016
1159
2017
1160
# Default values for config file for server-global settings
2018
server_defaults = { "interface": "",
2019
"address": "",
2020
"port": "",
2021
"debug": "False",
2022
"priority":
2023
"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2024
"servicename": "Mandos",
2025
"use_dbus": "True",
2026
"use_ipv6": "True",
2027
"debuglevel": "",
2028
"restore": "True",
2029
"statedir": "/var/lib/mandos"
1161
server_defaults = { u"interface": u"",
1162
u"address": u"",
1163
u"port": u"",
1164
u"debug": u"False",
1165
u"priority":
1166
u"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1167
u"servicename": u"Mandos",
1168
u"use_dbus": u"True",
1169
u"use_ipv6": u"True",
2030
1170
}
2031
1171
2032
1172
# Parse config file for server-global settings
2033
1173
server_config = configparser.SafeConfigParser(server_defaults)
2034
1174
del server_defaults
2035
1175
server_config.read(os.path.join(options.configdir,
2036
"mandos.conf"))
1176
u"mandos.conf"))
2037
1177
# Convert the SafeConfigParser object to a dict
2038
1178
server_settings = server_config.defaults()
2039
1179
# Use the appropriate methods on the non-string config options
2040
for option in ("debug", "use_dbus", "use_ipv6"):
2041
server_settings[option] = server_config.getboolean("DEFAULT",
1180
for option in (u"debug", u"use_dbus", u"use_ipv6"):
1181
server_settings[option] = server_config.getboolean(u"DEFAULT",
2042
1182
option)
2043
1183
if server_settings["port"]:
2044
server_settings["port"] = server_config.getint("DEFAULT",
2045
"port")
1184
server_settings["port"] = server_config.getint(u"DEFAULT",
1185
u"port")
2046
1186
del server_config
2047
1187
2048
1188
# Override the settings from the config file with command line
2049
1189
# options, if set.
2050
for option in ("interface", "address", "port", "debug",
2051
"priority", "servicename", "configdir",
2052
"use_dbus", "use_ipv6", "debuglevel", "restore",
2053
"statedir"):
1190
for option in (u"interface", u"address", u"port", u"debug",
1191
u"priority", u"servicename", u"configdir",
1192
u"use_dbus", u"use_ipv6"):
2054
1193
value = getattr(options, option)
2055
1194
if value is not None:
2056
1195
server_settings[option] = value
2064
1203
##################################################################
2065
1204
2066
1205
# For convenience
2067
debug = server_settings["debug"]
2068
debuglevel = server_settings["debuglevel"]
2069
use_dbus = server_settings["use_dbus"]
2070
use_ipv6 = server_settings["use_ipv6"]
2071
stored_state_path = os.path.join(server_settings["statedir"],
2072
stored_state_file)
2073
2074
if debug:
2075
initlogger(debug, logging.DEBUG)
2076
else:
2077
if not debuglevel:
2078
initlogger(debug)
2079
else:
2080
level = getattr(logging, debuglevel.upper())
2081
initlogger(debug, level)
2082
2083
if server_settings["servicename"] != "Mandos":
1206
debug = server_settings[u"debug"]
1207
use_dbus = server_settings[u"use_dbus"]
1208
use_ipv6 = server_settings[u"use_ipv6"]
1209
1210
if not debug:
1211
syslogger.setLevel(logging.WARNING)
1212
console.setLevel(logging.WARNING)
1213
1214
if server_settings[u"servicename"] != u"Mandos":
2084
1215
syslogger.setFormatter(logging.Formatter
2085
('Mandos (%s) [%%(process)d]:'
2086
' %%(levelname)s: %%(message)s'
2087
% server_settings["servicename"]))
1216
(u'Mandos (%s) [%%(process)d]:'
1217
u' %%(levelname)s: %%(message)s'
1218
% server_settings[u"servicename"]))
2088
1219
2089
1220
# Parse config file with clients
2090
client_config = configparser.SafeConfigParser(Client
2091
.client_defaults)
2092
client_config.read(os.path.join(server_settings["configdir"],
2093
"clients.conf"))
1221
client_defaults = { u"timeout": u"1h",
1222
u"interval": u"5m",
1223
u"checker": u"fping -q -- %%(host)s",
1224
u"host": u"",
1225
}
1226
client_config = configparser.SafeConfigParser(client_defaults)
1227
client_config.read(os.path.join(server_settings[u"configdir"],
1228
u"clients.conf"))
2094
1229
2095
1230
global mandos_dbus_service
2096
1231
mandos_dbus_service = None
2097
1232
2098
tcp_server = MandosServer((server_settings["address"],
2099
server_settings["port"]),
2100
ClientHandler,
2101
interface=(server_settings["interface"]
2102
or None),
2103
use_ipv6=use_ipv6,
2104
gnutls_priority=
2105
server_settings["priority"],
2106
use_dbus=use_dbus)
2107
if not debug:
2108
pidfilename = "/var/run/mandos.pid"
2109
try:
2110
pidfile = open(pidfilename, "w")
2111
except IOError:
2112
logger.error("Could not open file %r", pidfilename)
1233
clients = set()
1234
tcp_server = IPv6_TCPServer((server_settings[u"address"],
1235
server_settings[u"port"]),
1236
ClientHandler,
1237
interface=
1238
server_settings[u"interface"],
1239
use_ipv6=use_ipv6,
1240
clients=clients,
1241
gnutls_priority=
1242
server_settings[u"priority"],
1243
use_dbus=use_dbus)
1244
pidfilename = u"/var/run/mandos.pid"
1245
try:
1246
pidfile = open(pidfilename, u"w")
1247
except IOError:
1248
logger.error(u"Could not open file %r", pidfilename)
2113
1249
2114
1250
try:
2115
uid = pwd.getpwnam("_mandos").pw_uid
2116
gid = pwd.getpwnam("_mandos").pw_gid
1251
uid = pwd.getpwnam(u"_mandos").pw_uid
1252
gid = pwd.getpwnam(u"_mandos").pw_gid
2117
1253
except KeyError:
2118
1254
try:
2119
uid = pwd.getpwnam("mandos").pw_uid
2120
gid = pwd.getpwnam("mandos").pw_gid
1255
uid = pwd.getpwnam(u"mandos").pw_uid
1256
gid = pwd.getpwnam(u"mandos").pw_gid
2121
1257
except KeyError:
2122
1258
try:
2123
uid = pwd.getpwnam("nobody").pw_uid
2124
gid = pwd.getpwnam("nobody").pw_gid
1259
uid = pwd.getpwnam(u"nobody").pw_uid
1260
gid = pwd.getpwnam(u"nobody").pw_gid
2125
1261
except KeyError:
2126
1262
uid = 65534
2127
1263
gid = 65534
2128
1264
try:
2129
1265
os.setgid(gid)
2130
1266
os.setuid(uid)
2131
except OSError as error:
1267
except OSError, error:
2132
1268
if error[0] != errno.EPERM:
2133
1269
raise error
2134
1270
1271
# Enable all possible GnuTLS debugging
2135
1272
if debug:
2136
# Enable all possible GnuTLS debugging
2137
2138
1273
# "Use a log level over 10 to enable all debugging options."
2139
1274
# - GnuTLS manual
2140
1275
gnutls.library.functions.gnutls_global_set_log_level(11)
2141
1276
2142
1277
@gnutls.library.types.gnutls_log_func
2143
1278
def debug_gnutls(level, string):
2144
logger.debug("GnuTLS: %s", string[:-1])
1279
logger.debug(u"GnuTLS: %s", string[:-1])
2145
1280
2146
1281
(gnutls.library.functions
2147
1282
.gnutls_global_set_log_function(debug_gnutls))
2148
2149
# Redirect stdin so all checkers get /dev/null
2150
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2151
os.dup2(null, sys.stdin.fileno())
2152
if null > 2:
2153
os.close(null)
2154
2155
# Need to fork before connecting to D-Bus
2156
if not debug:
2157
# Close all input and output, do double fork, etc.
2158
daemon()
2159
2160
gobject.threads_init()
1283
1284
global service
1285
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1286
service = AvahiService(name = server_settings[u"servicename"],
1287
servicetype = u"_mandos._tcp",
1288
protocol = protocol)
1289
if server_settings["interface"]:
1290
service.interface = (if_nametoindex
1291
(str(server_settings[u"interface"])))
2161
1292
2162
1293
global main_loop
1294
global bus
1295
global server
2163
1296
# From the Avahi example code
2164
1297
DBusGMainLoop(set_as_default=True )
2165
1298
main_loop = gobject.MainLoop()
2166
1299
bus = dbus.SystemBus()
1300
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
1301
avahi.DBUS_PATH_SERVER),
1302
avahi.DBUS_INTERFACE_SERVER)
2167
1303
# End of Avahi example code
2168
1304
if use_dbus:
2169
try:
2170
bus_name = dbus.service.BusName("se.recompile.Mandos",
2171
bus, do_not_queue=True)
2172
old_bus_name = (dbus.service.BusName
2173
("se.bsnet.fukt.Mandos", bus,
2174
do_not_queue=True))
2175
except dbus.exceptions.NameExistsException as e:
2176
logger.error(unicode(e) + ", disabling D-Bus")
2177
use_dbus = False
2178
server_settings["use_dbus"] = False
2179
tcp_server.use_dbus = False
2180
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2181
service = AvahiServiceToSyslog(name =
2182
server_settings["servicename"],
2183
servicetype = "_mandos._tcp",
2184
protocol = protocol, bus = bus)
2185
if server_settings["interface"]:
2186
service.interface = (if_nametoindex
2187
(str(server_settings["interface"])))
2188
2189
global multiprocessing_manager
2190
multiprocessing_manager = multiprocessing.Manager()
1305
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
2191
1306
2192
1307
client_class = Client
2193
1308
if use_dbus:
2194
client_class = functools.partial(ClientDBusTransitional,
2195
bus = bus)
2196
2197
client_settings = Client.config_parser(client_config)
2198
old_client_settings = {}
2199
clients_data = {}
2200
2201
# Get client data and settings from last running state.
2202
if server_settings["restore"]:
2203
try:
2204
with open(stored_state_path, "rb") as stored_state:
2205
clients_data, old_client_settings = (pickle.load
2206
(stored_state))
2207
os.remove(stored_state_path)
2208
except IOError as e:
2209
logger.warning("Could not load persistent state: {0}"
2210
.format(e))
2211
if e.errno != errno.ENOENT:
2212
raise
2213
except EOFError as e:
2214
logger.warning("Could not load persistent state: "
2215
"EOFError: {0}".format(e))
2216
2217
with PGPEngine() as pgp:
2218
for client_name, client in clients_data.iteritems():
2219
# Decide which value to use after restoring saved state.
2220
# We have three different values: Old config file,
2221
# new config file, and saved state.
2222
# New config value takes precedence if it differs from old
2223
# config value, otherwise use saved state.
2224
for name, value in client_settings[client_name].items():
2225
try:
2226
# For each value in new config, check if it
2227
# differs from the old config value (Except for
2228
# the "secret" attribute)
2229
if (name != "secret" and
2230
value != old_client_settings[client_name]
2231
[name]):
2232
client[name] = value
2233
except KeyError:
2234
pass
2235
2236
# Clients who has passed its expire date can still be
2237
# enabled if its last checker was successful. Clients
2238
# whose checker succeeded before we stored its state is
2239
# assumed to have successfully run all checkers during
2240
# downtime.
2241
if client["enabled"]:
2242
if datetime.datetime.utcnow() >= client["expires"]:
2243
if not client["last_checked_ok"]:
2244
logger.warning(
2245
"disabling client {0} - Client never "
2246
"performed a successful checker"
2247
.format(client_name))
2248
client["enabled"] = False
2249
elif client["last_checker_status"] != 0:
2250
logger.warning(
2251
"disabling client {0} - Client "
2252
"last checker failed with error code {1}"
2253
.format(client_name,
2254
client["last_checker_status"]))
2255
client["enabled"] = False
2256
else:
2257
client["expires"] = (datetime.datetime
2258
.utcnow()
2259
+ client["timeout"])
2260
logger.debug("Last checker succeeded,"
2261
" keeping {0} enabled"
2262
.format(client_name))
2263
try:
2264
client["secret"] = (
2265
pgp.decrypt(client["encrypted_secret"],
2266
client_settings[client_name]
2267
["secret"]))
2268
except PGPError:
2269
# If decryption fails, we use secret from new settings
2270
logger.debug("Failed to decrypt {0} old secret"
2271
.format(client_name))
2272
client["secret"] = (
2273
client_settings[client_name]["secret"])
2274
2275
2276
# Add/remove clients based on new changes made to config
2277
for client_name in (set(old_client_settings)
2278
- set(client_settings)):
2279
del clients_data[client_name]
2280
for client_name in (set(client_settings)
2281
- set(old_client_settings)):
2282
clients_data[client_name] = client_settings[client_name]
2283
2284
# Create all client objects
2285
for client_name, client in clients_data.iteritems():
2286
tcp_server.clients[client_name] = client_class(
2287
name = client_name, settings = client)
2288
2289
if not tcp_server.clients:
2290
logger.warning("No clients defined")
1309
client_class = ClientDBus
1310
clients.update(set(
1311
client_class(name = section,
1312
config= dict(client_config.items(section)))
1313
for section in client_config.sections()))
1314
if not clients:
1315
logger.warning(u"No clients defined")
1316
1317
if debug:
1318
# Redirect stdin so all checkers get /dev/null
1319
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1320
os.dup2(null, sys.stdin.fileno())
1321
if null > 2:
1322
os.close(null)
1323
else:
1324
# No console logging
1325
logger.removeHandler(console)
1326
# Close all input and output, do double fork, etc.
1327
daemon()
1328
1329
try:
1330
with closing(pidfile):
1331
pid = os.getpid()
1332
pidfile.write(str(pid) + "\n")
1333
del pidfile
1334
except IOError:
1335
logger.error(u"Could not write to file %r with PID %d",
1336
pidfilename, pid)
1337
except NameError:
1338
# "pidfile" was never created
1339
pass
1340
del pidfilename
1341
1342
def cleanup():
1343
"Cleanup function; run on exit"
1344
global group
1345
# From the Avahi example code
1346
if not group is None:
1347
group.Free()
1348
group = None
1349
# End of Avahi example code
2291
1350
1351
while clients:
1352
client = clients.pop()
1353
client.disable_hook = None
1354
client.disable()
1355
1356
atexit.register(cleanup)
1357
2292
1358
if not debug:
2293
try:
2294
with pidfile:
2295
pid = os.getpid()
2296
pidfile.write(str(pid) + "\n".encode("utf-8"))
2297
del pidfile
2298
except IOError:
2299
logger.error("Could not write to file %r with PID %d",
2300
pidfilename, pid)
2301
except NameError:
2302
# "pidfile" was never created
2303
pass
2304
del pidfilename
2305
1359
signal.signal(signal.SIGINT, signal.SIG_IGN)
2306
2307
1360
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2308
1361
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2309
1362
2311
1364
class MandosDBusService(dbus.service.Object):
2312
1365
"""A D-Bus proxy object"""
2313
1366
def __init__(self):
2314
dbus.service.Object.__init__(self, bus, "/")
2315
_interface = "se.recompile.Mandos"
2316
2317
@dbus.service.signal(_interface, signature="o")
2318
def ClientAdded(self, objpath):
2319
"D-Bus signal"
2320
pass
2321
2322
@dbus.service.signal(_interface, signature="ss")
2323
def ClientNotFound(self, fingerprint, address):
2324
"D-Bus signal"
2325
pass
2326
2327
@dbus.service.signal(_interface, signature="os")
1367
dbus.service.Object.__init__(self, bus, u"/")
1368
_interface = u"se.bsnet.fukt.Mandos"
1369
1370
@dbus.service.signal(_interface, signature=u"oa{sv}")
1371
def ClientAdded(self, objpath, properties):
1372
"D-Bus signal"
1373
pass
1374
1375
@dbus.service.signal(_interface, signature=u"s")
1376
def ClientNotFound(self, fingerprint):
1377
"D-Bus signal"
1378
pass
1379
1380
@dbus.service.signal(_interface, signature=u"os")
2328
1381
def ClientRemoved(self, objpath, name):
2329
1382
"D-Bus signal"
2330
1383
pass
2331
1384
2332
@dbus.service.method(_interface, out_signature="ao")
1385
@dbus.service.method(_interface, out_signature=u"ao")
2333
1386
def GetAllClients(self):
2334
1387
"D-Bus method"
2335
return dbus.Array(c.dbus_object_path
2336
for c in
2337
tcp_server.clients.itervalues())
1388
return dbus.Array(c.dbus_object_path for c in clients)
2338
1389
2339
1390
@dbus.service.method(_interface,
2340
out_signature="a{oa{sv}}")
1391
out_signature=u"a{oa{sv}}")
2341
1392
def GetAllClientsWithProperties(self):
2342
1393
"D-Bus method"
2343
1394
return dbus.Dictionary(
2344
((c.dbus_object_path, c.GetAll(""))
2345
for c in tcp_server.clients.itervalues()),
2346
signature="oa{sv}")
1395
((c.dbus_object_path, c.GetAllProperties())
1396
for c in clients),
1397
signature=u"oa{sv}")
2347
1398
2348
@dbus.service.method(_interface, in_signature="o")
1399
@dbus.service.method(_interface, in_signature=u"o")
2349
1400
def RemoveClient(self, object_path):
2350
1401
"D-Bus method"
2351
for c in tcp_server.clients.itervalues():
1402
for c in clients:
2352
1403
if c.dbus_object_path == object_path:
2353
del tcp_server.clients[c.name]
1404
clients.remove(c)
2354
1405
c.remove_from_connection()
2355
1406
# Don't signal anything except ClientRemoved
2356
c.disable(quiet=True)
1407
c.disable(signal=False)
2357
1408
# Emit D-Bus signal
2358
1409
self.ClientRemoved(object_path, c.name)
2359
1410
return
2360
raise KeyError(object_path)
1411
raise KeyError
2361
1412
2362
1413
del _interface
2363
1414
2364
class MandosDBusServiceTransitional(MandosDBusService):
2365
__metaclass__ = AlternateDBusNamesMetaclass
2366
mandos_dbus_service = MandosDBusServiceTransitional()
2367
2368
def cleanup():
2369
"Cleanup function; run on exit"
2370
service.cleanup()
2371
2372
multiprocessing.active_children()
2373
if not (tcp_server.clients or client_settings):
2374
return
2375
2376
# Store client before exiting. Secrets are encrypted with key
2377
# based on what config file has. If config file is
2378
# removed/edited, old secret will thus be unrecovable.
2379
clients = {}
2380
with PGPEngine() as pgp:
2381
for client in tcp_server.clients.itervalues():
2382
key = client_settings[client.name]["secret"]
2383
client.encrypted_secret = pgp.encrypt(client.secret,
2384
key)
2385
client_dict = {}
2386
2387
# A list of attributes that can not be pickled
2388
# + secret.
2389
exclude = set(("bus", "changedstate", "secret",
2390
"checker"))
2391
for name, typ in (inspect.getmembers
2392
(dbus.service.Object)):
2393
exclude.add(name)
2394
2395
client_dict["encrypted_secret"] = (client
2396
.encrypted_secret)
2397
for attr in client.client_structure:
2398
if attr not in exclude:
2399
client_dict[attr] = getattr(client, attr)
2400
2401
clients[client.name] = client_dict
2402
del client_settings[client.name]["secret"]
2403
2404
try:
2405
tempfd, tempname = tempfile.mkstemp(suffix=".pickle",
2406
prefix="clients-",
2407
dir=os.path.dirname
2408
(stored_state_path))
2409
with os.fdopen(tempfd, "wb") as stored_state:
2410
pickle.dump((clients, client_settings), stored_state)
2411
os.rename(tempname, stored_state_path)
2412
except (IOError, OSError) as e:
2413
logger.warning("Could not save persistent state: {0}"
2414
.format(e))
2415
if not debug:
2416
try:
2417
os.remove(tempname)
2418
except NameError:
2419
pass
2420
if e.errno not in set((errno.ENOENT, errno.EACCES,
2421
errno.EEXIST)):
2422
raise e
2423
2424
# Delete all clients, and settings from config
2425
while tcp_server.clients:
2426
name, client = tcp_server.clients.popitem()
2427
if use_dbus:
2428
client.remove_from_connection()
2429
# Don't signal anything except ClientRemoved
2430
client.disable(quiet=True)
2431
if use_dbus:
2432
# Emit D-Bus signal
2433
mandos_dbus_service.ClientRemoved(client
2434
.dbus_object_path,
2435
client.name)
2436
client_settings.clear()
2437
2438
atexit.register(cleanup)
2439
2440
for client in tcp_server.clients.itervalues():
1415
mandos_dbus_service = MandosDBusService()
1416
1417
for client in clients:
2441
1418
if use_dbus:
2442
1419
# Emit D-Bus signal
2443
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2444
# Need to initiate checking of clients
2445
if client.enabled:
2446
client.init_checker()
1420
mandos_dbus_service.ClientAdded(client.dbus_object_path,
1421
client.GetAllProperties())
1422
client.enable()
2447
1423
2448
1424
tcp_server.enable()
2449
1425
tcp_server.server_activate()
2451
1427
# Find out what port we got
2452
1428
service.port = tcp_server.socket.getsockname()[1]
2453
1429
if use_ipv6:
2454
logger.info("Now listening on address %r, port %d,"
1430
logger.info(u"Now listening on address %r, port %d,"
2455
1431
" flowinfo %d, scope_id %d"
2456
1432
% tcp_server.socket.getsockname())
2457
1433
else: # IPv4
2458
logger.info("Now listening on address %r, port %d"
1434
logger.info(u"Now listening on address %r, port %d"
2459
1435
% tcp_server.socket.getsockname())
2460
1436
2461
1437
#service.interface = tcp_server.socket.getsockname()[3]
2462
1438
2463
1439
try:
2464
1440
# From the Avahi example code
1441
server.connect_to_signal(u"StateChanged", server_state_changed)
2465
1442
try:
2466
service.activate()
2467
except dbus.exceptions.DBusException as error:
2468
logger.critical("DBusException: %s", error)
2469
cleanup()
1443
server_state_changed(server.GetState())
1444
except dbus.exceptions.DBusException, error:
1445
logger.critical(u"DBusException: %s", error)
2470
1446
sys.exit(1)
2471
1447
# End of Avahi example code
2472
1448
2475
1451
(tcp_server.handle_request
2476
1452
(*args[2:], **kwargs) or True))
2477
1453
2478
logger.debug("Starting main loop")
1454
logger.debug(u"Starting main loop")
2479
1455
main_loop.run()
2480
except AvahiError as error:
2481
logger.critical("AvahiError: %s", error)
2482
cleanup()
1456
except AvahiError, error:
1457
logger.critical(u"AvahiError: %s", error)
2483
1458
sys.exit(1)
2484
1459
except KeyboardInterrupt:
2485
1460
if debug:
2486
print("", file=sys.stderr)
2487
logger.debug("Server received KeyboardInterrupt")
2488
logger.debug("Server exiting")
2489
# Must run before the D-Bus bus name gets deregistered
2490
cleanup()
1461
print >> sys.stderr
1462
logger.debug(u"Server received KeyboardInterrupt")
1463
logger.debug(u"Server exiting")
2491
1464
2492
1465
if __name__ == '__main__':
2493
1466
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0