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- Committer: Teddy Hogeborn
- Date: 2009-05-17 00:50:09 UTC
- mto: (24.1.170 mandos) (237.4.29 release)
- mto: This revision was merged to the branch mainline in revision 343.
- Revision ID: teddy@fukt.bsnet.se-20090517005009-c0iptxampo6nf177
* initramfs-tools-hook-conf: Security bug fix: Add code to handle
being called by "mkinitramfs-kpkg"
instead of "update-initramfs".
being called by "mkinitramfs-kpkg"
instead of "update-initramfs".
- 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
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16
#
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# 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
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# <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
import SocketServer as socketserver
36
import SocketServer
38
37
import socket
39
import argparse
38
import optparse
40
39
import datetime
41
40
import errno
42
41
import gnutls.crypto
45
44
import gnutls.library.functions
46
45
import gnutls.library.constants
47
46
import gnutls.library.types
48
import ConfigParser as configparser
47
import ConfigParser
49
48
import sys
50
49
import re
51
50
import os
52
51
import signal
52
from sets import Set
53
53
import subprocess
54
54
import atexit
55
55
import stat
56
56
import logging
57
57
import logging.handlers
58
58
import pwd
59
import contextlib
60
import struct
61
import fcntl
62
import functools
63
import cPickle as pickle
64
import multiprocessing
65
import types
66
import binascii
67
import tempfile
59
from contextlib import closing
68
60
69
61
import dbus
70
62
import dbus.service
73
65
from dbus.mainloop.glib import DBusGMainLoop
74
66
import ctypes
75
67
import ctypes.util
76
import xml.dom.minidom
77
import inspect
78
import GnuPGInterface
79
80
try:
81
SO_BINDTODEVICE = socket.SO_BINDTODEVICE
82
except AttributeError:
83
try:
84
from IN import SO_BINDTODEVICE
85
except ImportError:
86
SO_BINDTODEVICE = None
87
88
version = "1.5.0"
89
stored_state_file = "clients.pickle"
90
91
logger = logging.getLogger()
68
69
version = "1.0.8"
70
71
logger = logging.Logger('mandos')
92
72
syslogger = (logging.handlers.SysLogHandler
93
73
(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
74
address = "/dev/log"))
75
syslogger.setFormatter(logging.Formatter
76
('Mandos [%(process)d]: %(levelname)s:'
77
' %(message)s'))
78
logger.addHandler(syslogger)
79
80
console = logging.StreamHandler()
81
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
82
' %(levelname)s: %(message)s'))
83
logger.addHandler(console)
211
84
212
85
class AvahiError(Exception):
213
86
def __init__(self, value, *args, **kwargs):
225
98
226
99
class AvahiService(object):
227
100
"""An Avahi (Zeroconf) service.
228
229
101
Attributes:
230
102
interface: integer; avahi.IF_UNSPEC or an interface index.
231
103
Used to optionally bind to the specified interface.
239
111
max_renames: integer; maximum number of renames
240
112
rename_count: integer; counter so we only rename after collisions
241
113
a sensible number of times
242
group: D-Bus Entry Group
243
server: D-Bus Server
244
bus: dbus.SystemBus()
245
114
"""
246
115
def __init__(self, interface = avahi.IF_UNSPEC, name = None,
247
116
servicetype = None, port = None, TXT = None,
248
117
domain = "", host = "", max_renames = 32768,
249
protocol = avahi.PROTO_UNSPEC, bus = None):
118
protocol = avahi.PROTO_UNSPEC):
250
119
self.interface = interface
251
120
self.name = name
252
121
self.type = servicetype
257
126
self.rename_count = 0
258
127
self.max_renames = max_renames
259
128
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
129
def rename(self):
265
130
"""Derived from the Avahi example code"""
266
131
if self.rename_count >= self.max_renames:
267
logger.critical("No suitable Zeroconf service name found"
268
" after %i retries, exiting.",
132
logger.critical(u"No suitable Zeroconf service name found"
133
u" after %i retries, exiting.",
269
134
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 ...",
274
self.name)
135
raise AvahiServiceError(u"Too many renames")
136
self.name = server.GetAlternativeServiceName(self.name)
137
logger.info(u"Changing Zeroconf service name to %r ...",
138
str(self.name))
139
syslogger.setFormatter(logging.Formatter
140
('Mandos (%s): %%(levelname)s:'
141
' %%(message)s' % self.name))
275
142
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)
143
self.add()
282
144
self.rename_count += 1
283
145
def remove(self):
284
146
"""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()
147
if group is not None:
148
group.Reset()
290
149
def add(self):
291
150
"""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
388
class Client(object):
151
global group
152
if group is None:
153
group = dbus.Interface(bus.get_object
154
(avahi.DBUS_NAME,
155
server.EntryGroupNew()),
156
avahi.DBUS_INTERFACE_ENTRY_GROUP)
157
group.connect_to_signal('StateChanged',
158
entry_group_state_changed)
159
logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
160
service.name, service.type)
161
group.AddService(
162
self.interface, # interface
163
self.protocol, # protocol
164
dbus.UInt32(0), # flags
165
self.name, self.type,
166
self.domain, self.host,
167
dbus.UInt16(self.port),
168
avahi.string_array_to_txt_array(self.TXT))
169
group.Commit()
170
171
# From the Avahi example code:
172
group = None # our entry group
173
# End of Avahi example code
174
175
176
def _datetime_to_dbus(dt, variant_level=0):
177
"""Convert a UTC datetime.datetime() to a D-Bus type."""
178
return dbus.String(dt.isoformat(), variant_level=variant_level)
179
180
181
class Client(dbus.service.Object):
389
182
"""A representation of a client host served by this server.
390
391
183
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
184
name: string; from the config file, used in log messages and
185
D-Bus identifiers
186
fingerprint: string (40 or 32 hexadecimal digits); used to
187
uniquely identify the client
188
secret: bytestring; sent verbatim (over TLS) to client
189
host: string; available for use by the checker command
190
created: datetime.datetime(); (UTC) object creation
191
last_enabled: datetime.datetime(); (UTC)
192
enabled: bool()
193
last_checked_ok: datetime.datetime(); (UTC) or None
194
timeout: datetime.timedelta(); How long from last_checked_ok
195
until this client is invalid
196
interval: datetime.timedelta(); How often to start a new checker
197
disable_hook: If set, called by disable() as disable_hook(self)
395
198
checker: subprocess.Popen(); a running checker process used
396
199
to see if the client lives.
397
200
'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
201
checker_initiator_tag: a gobject event source tag, or None
202
disable_initiator_tag: - '' -
203
checker_callback_tag: - '' -
204
checker_command: string; External command which is run to check if
205
client lives. %() expansions are done at
401
206
runtime with vars(self) as dict, so that for
402
207
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
208
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 password has been sent
426
runtime_expansions: Allowed attributes for runtime expansion.
427
expires: datetime.datetime(); time (UTC) when a client will be
428
disabled, or None
209
use_dbus: bool(); Whether to provide D-Bus interface and signals
210
dbus_object_path: dbus.ObjectPath ; only set if self.use_dbus
429
211
"""
430
431
runtime_expansions = ("approval_delay", "approval_duration",
432
"created", "enabled", "fingerprint",
433
"host", "interval", "last_checked_ok",
434
"last_enabled", "name", "timeout")
435
client_defaults = { "timeout": "5m",
436
"extended_timeout": "15m",
437
"interval": "2m",
438
"checker": "fping -q -- %%(host)s",
439
"host": "",
440
"approval_delay": "0s",
441
"approval_duration": "1s",
442
"approved_by_default": "True",
443
"enabled": "True",
444
}
445
446
212
def timeout_milliseconds(self):
447
213
"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)
214
return ((self.timeout.days * 24 * 60 * 60 * 1000)
215
+ (self.timeout.seconds * 1000)
216
+ (self.timeout.microseconds // 1000))
453
217
454
218
def interval_milliseconds(self):
455
219
"Return the 'interval' attribute in milliseconds"
456
return timedelta_to_milliseconds(self.interval)
220
return ((self.interval.days * 24 * 60 * 60 * 1000)
221
+ (self.interval.seconds * 1000)
222
+ (self.interval.microseconds // 1000))
457
223
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):
224
def __init__(self, name = None, disable_hook=None, config=None,
225
use_dbus=True):
510
226
"""Note: the 'checker' key in 'config' sets the
511
227
'checker_command' attribute and *not* the 'checker'
512
228
attribute."""
513
229
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)
230
if config is None:
231
config = {}
232
logger.debug(u"Creating client %r", self.name)
233
self.use_dbus = False # During __init__
529
234
# Uppercase and remove spaces from fingerprint for later
530
235
# comparison purposes with return value from the fingerprint()
531
236
# 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
237
self.fingerprint = (config["fingerprint"].upper()
238
.replace(u" ", u""))
239
logger.debug(u" Fingerprint: %s", self.fingerprint)
240
if "secret" in config:
241
self.secret = config["secret"].decode(u"base64")
242
elif "secfile" in config:
243
with closing(open(os.path.expanduser
244
(os.path.expandvars
245
(config["secfile"])))) as secfile:
246
self.secret = secfile.read()
247
else:
248
raise TypeError(u"No secret or secfile for client %s"
249
% self.name)
250
self.host = config.get("host", "")
251
self.created = datetime.datetime.utcnow()
252
self.enabled = False
253
self.last_enabled = None
254
self.last_checked_ok = None
255
self.timeout = string_to_delta(config["timeout"])
256
self.interval = string_to_delta(config["interval"])
257
self.disable_hook = disable_hook
537
258
self.checker = None
538
259
self.checker_initiator_tag = None
539
260
self.disable_initiator_tag = None
540
261
self.checker_callback_tag = None
262
self.checker_command = config["checker"]
541
263
self.current_checker_command = None
542
self.approved = None
543
self.approvals_pending = 0
544
self.changedstate = (multiprocessing_manager
545
.Condition(multiprocessing_manager
546
.Lock()))
547
self.client_structure = [attr for attr in
548
self.__dict__.iterkeys()
549
if not attr.startswith("_")]
550
self.client_structure.append("client_structure")
551
552
for name, t in inspect.getmembers(type(self),
553
lambda obj:
554
isinstance(obj,
555
property)):
556
if not name.startswith("_"):
557
self.client_structure.append(name)
558
559
# Send notice to process children that client state has changed
560
def send_changedstate(self):
561
with self.changedstate:
562
self.changedstate.notify_all()
264
self.last_connect = None
265
# Only now, when this client is initialized, can it show up on
266
# the D-Bus
267
self.use_dbus = use_dbus
268
if self.use_dbus:
269
self.dbus_object_path = (dbus.ObjectPath
270
("/clients/"
271
+ self.name.replace(".", "_")))
272
dbus.service.Object.__init__(self, bus,
273
self.dbus_object_path)
563
274
564
275
def enable(self):
565
276
"""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
277
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
278
# Schedule a new checker to be started an 'interval' from now,
600
279
# and every interval from then on.
601
280
self.checker_initiator_tag = (gobject.timeout_add
602
281
(self.interval_milliseconds(),
603
282
self.start_checker))
283
# Also start a new checker *right now*.
284
self.start_checker()
604
285
# Schedule a disable() when 'timeout' has passed
605
286
self.disable_initiator_tag = (gobject.timeout_add
606
287
(self.timeout_milliseconds(),
607
288
self.disable))
608
# Also start a new checker *right now*.
609
self.start_checker()
289
self.enabled = True
290
if self.use_dbus:
291
# Emit D-Bus signals
292
self.PropertyChanged(dbus.String(u"enabled"),
293
dbus.Boolean(True, variant_level=1))
294
self.PropertyChanged(dbus.String(u"last_enabled"),
295
(_datetime_to_dbus(self.last_enabled,
296
variant_level=1)))
297
298
def disable(self):
299
"""Disable this client."""
300
if not getattr(self, "enabled", False):
301
return False
302
logger.info(u"Disabling client %s", self.name)
303
if getattr(self, "disable_initiator_tag", False):
304
gobject.source_remove(self.disable_initiator_tag)
305
self.disable_initiator_tag = None
306
if getattr(self, "checker_initiator_tag", False):
307
gobject.source_remove(self.checker_initiator_tag)
308
self.checker_initiator_tag = None
309
self.stop_checker()
310
if self.disable_hook:
311
self.disable_hook(self)
312
self.enabled = False
313
if self.use_dbus:
314
# Emit D-Bus signal
315
self.PropertyChanged(dbus.String(u"enabled"),
316
dbus.Boolean(False, variant_level=1))
317
# Do not run this again if called by a gobject.timeout_add
318
return False
319
320
def __del__(self):
321
self.disable_hook = None
322
self.disable()
610
323
611
324
def checker_callback(self, pid, condition, command):
612
325
"""The checker has completed, so take appropriate actions."""
613
326
self.checker_callback_tag = None
614
327
self.checker = None
328
if self.use_dbus:
329
# Emit D-Bus signal
330
self.PropertyChanged(dbus.String(u"checker_running"),
331
dbus.Boolean(False, variant_level=1))
615
332
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",
333
exitstatus = os.WEXITSTATUS(condition)
334
if exitstatus == 0:
335
logger.info(u"Checker for %(name)s succeeded",
619
336
vars(self))
620
337
self.checked_ok()
621
338
else:
622
logger.info("Checker for %(name)s failed",
339
logger.info(u"Checker for %(name)s failed",
623
340
vars(self))
341
if self.use_dbus:
342
# Emit D-Bus signal
343
self.CheckerCompleted(dbus.Int16(exitstatus),
344
dbus.Int64(condition),
345
dbus.String(command))
624
346
else:
625
self.last_checker_status = -1
626
logger.warning("Checker for %(name)s crashed?",
347
logger.warning(u"Checker for %(name)s crashed?",
627
348
vars(self))
349
if self.use_dbus:
350
# Emit D-Bus signal
351
self.CheckerCompleted(dbus.Int16(-1),
352
dbus.Int64(condition),
353
dbus.String(command))
628
354
629
def checked_ok(self, timeout=None):
355
def checked_ok(self):
630
356
"""Bump up the timeout for this client.
631
632
357
This should only be called when the client has been seen,
633
358
alive and well.
634
359
"""
635
if timeout is None:
636
timeout = self.timeout
637
360
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()
361
gobject.source_remove(self.disable_initiator_tag)
362
self.disable_initiator_tag = (gobject.timeout_add
363
(self.timeout_milliseconds(),
364
self.disable))
365
if self.use_dbus:
366
# Emit D-Bus signal
367
self.PropertyChanged(
368
dbus.String(u"last_checked_ok"),
369
(_datetime_to_dbus(self.last_checked_ok,
370
variant_level=1)))
648
371
649
372
def start_checker(self):
650
373
"""Start a new checker subprocess if one is not running.
651
652
374
If a checker already exists, leave it running and do
653
375
nothing."""
654
376
# The reason for not killing a running checker is that if we
657
379
# client would inevitably timeout, since no checker would get
658
380
# a chance to run to completion. If we instead leave running
659
381
# 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.
382
# than 'timeout' for the client to be declared invalid, which
383
# is as it should be.
662
384
663
385
# If a checker exists, make sure it is not a zombie
664
try:
386
if self.checker is not None:
665
387
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
388
if pid:
672
389
logger.warning("Checker was a zombie")
673
390
gobject.source_remove(self.checker_callback_tag)
680
397
command = self.checker_command % self.host
681
398
except TypeError:
682
399
# 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
400
escaped_attrs = dict((key, re.escape(str(val)))
401
for key, val in
402
vars(self).iteritems())
691
403
try:
692
404
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)
405
except TypeError, error:
406
logger.error(u'Could not format string "%s":'
407
u' %s', self.checker_command, error)
696
408
return True # Try again later
697
self.current_checker_command = command
409
self.current_checker_command = command
698
410
try:
699
logger.info("Starting checker %r for %s",
411
logger.info(u"Starting checker %r for %s",
700
412
command, self.name)
701
413
# We don't need to redirect stdout and stderr, since
702
414
# in normal mode, that is already done by daemon(),
705
417
self.checker = subprocess.Popen(command,
706
418
close_fds=True,
707
419
shell=True, cwd="/")
420
if self.use_dbus:
421
# Emit D-Bus signal
422
self.CheckerStarted(command)
423
self.PropertyChanged(
424
dbus.String("checker_running"),
425
dbus.Boolean(True, variant_level=1))
708
426
self.checker_callback_tag = (gobject.child_watch_add
709
427
(self.checker.pid,
710
428
self.checker_callback,
715
433
if pid:
716
434
gobject.source_remove(self.checker_callback_tag)
717
435
self.checker_callback(pid, status, command)
718
except OSError as error:
719
logger.error("Failed to start subprocess: %s",
436
except OSError, error:
437
logger.error(u"Failed to start subprocess: %s",
720
438
error)
721
439
# Re-run this periodically if run by gobject.timeout_add
722
440
return True
728
446
self.checker_callback_tag = None
729
447
if getattr(self, "checker", None) is None:
730
448
return
731
logger.debug("Stopping checker for %(name)s", vars(self))
449
logger.debug(u"Stopping checker for %(name)s", vars(self))
732
450
try:
733
451
os.kill(self.checker.pid, signal.SIGTERM)
734
#time.sleep(0.5)
452
#os.sleep(0.5)
735
453
#if self.checker.poll() is None:
736
454
# os.kill(self.checker.pid, signal.SIGKILL)
737
except OSError as error:
455
except OSError, error:
738
456
if error.errno != errno.ESRCH: # No such process
739
457
raise
740
458
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):
1037
"""A Client class using D-Bus
1038
1039
Attributes:
1040
dbus_object_path: dbus.ObjectPath
1041
bus: dbus.SystemBus()
1042
"""
1043
1044
runtime_expansions = (Client.runtime_expansions
1045
+ ("dbus_object_path",))
1046
1047
# dbus.service.Object doesn't use super(), so we can't either.
1048
1049
def __init__(self, bus = None, *args, **kwargs):
1050
self.bus = bus
1051
Client.__init__(self, *args, **kwargs)
1052
self._approvals_pending = 0
1053
1054
self._approvals_pending = 0
1055
# Only now, when this client is initialized, can it show up on
1056
# the D-Bus
1057
client_object_name = unicode(self.name).translate(
1058
{ord("."): ord("_"),
1059
ord("-"): ord("_")})
1060
self.dbus_object_path = (dbus.ObjectPath
1061
("/clients/" + client_object_name))
1062
DBusObjectWithProperties.__init__(self, self.bus,
1063
self.dbus_object_path)
1064
1065
def notifychangeproperty(transform_func,
1066
dbus_name, type_func=lambda x: x,
1067
variant_level=1):
1068
""" Modify a variable so that it's a property which announces
1069
its changes to DBus.
1070
1071
transform_fun: Function that takes a value and a variant_level
1072
and transforms it to a D-Bus type.
1073
dbus_name: D-Bus name of the variable
1074
type_func: Function that transform the value before sending it
1075
to the D-Bus. Default: no transform
1076
variant_level: D-Bus variant level. Default: 1
1077
"""
1078
attrname = "_{0}".format(dbus_name)
1079
def setter(self, value):
1080
if hasattr(self, "dbus_object_path"):
1081
if (not hasattr(self, attrname) or
1082
type_func(getattr(self, attrname, None))
1083
!= type_func(value)):
1084
dbus_value = transform_func(type_func(value),
1085
variant_level
1086
=variant_level)
1087
self.PropertyChanged(dbus.String(dbus_name),
1088
dbus_value)
1089
setattr(self, attrname, value)
1090
1091
return property(lambda self: getattr(self, attrname), setter)
1092
1093
1094
expires = notifychangeproperty(datetime_to_dbus, "Expires")
1095
approvals_pending = notifychangeproperty(dbus.Boolean,
1096
"ApprovalPending",
1097
type_func = bool)
1098
enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1099
last_enabled = notifychangeproperty(datetime_to_dbus,
1100
"LastEnabled")
1101
checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1102
type_func = lambda checker:
1103
checker is not None)
1104
last_checked_ok = notifychangeproperty(datetime_to_dbus,
1105
"LastCheckedOK")
1106
last_approval_request = notifychangeproperty(
1107
datetime_to_dbus, "LastApprovalRequest")
1108
approved_by_default = notifychangeproperty(dbus.Boolean,
1109
"ApprovedByDefault")
1110
approval_delay = notifychangeproperty(dbus.UInt64,
1111
"ApprovalDelay",
1112
type_func =
1113
timedelta_to_milliseconds)
1114
approval_duration = notifychangeproperty(
1115
dbus.UInt64, "ApprovalDuration",
1116
type_func = timedelta_to_milliseconds)
1117
host = notifychangeproperty(dbus.String, "Host")
1118
timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1119
type_func =
1120
timedelta_to_milliseconds)
1121
extended_timeout = notifychangeproperty(
1122
dbus.UInt64, "ExtendedTimeout",
1123
type_func = timedelta_to_milliseconds)
1124
interval = notifychangeproperty(dbus.UInt64,
1125
"Interval",
1126
type_func =
1127
timedelta_to_milliseconds)
1128
checker_command = notifychangeproperty(dbus.String, "Checker")
1129
1130
del notifychangeproperty
1131
1132
def __del__(self, *args, **kwargs):
1133
try:
1134
self.remove_from_connection()
1135
except LookupError:
1136
pass
1137
if hasattr(DBusObjectWithProperties, "__del__"):
1138
DBusObjectWithProperties.__del__(self, *args, **kwargs)
1139
Client.__del__(self, *args, **kwargs)
1140
1141
def checker_callback(self, pid, condition, command,
1142
*args, **kwargs):
1143
self.checker_callback_tag = None
1144
self.checker = None
1145
if os.WIFEXITED(condition):
1146
exitstatus = os.WEXITSTATUS(condition)
1147
# Emit D-Bus signal
1148
self.CheckerCompleted(dbus.Int16(exitstatus),
1149
dbus.Int64(condition),
1150
dbus.String(command))
1151
else:
1152
# Emit D-Bus signal
1153
self.CheckerCompleted(dbus.Int16(-1),
1154
dbus.Int64(condition),
1155
dbus.String(command))
1156
1157
return Client.checker_callback(self, pid, condition, command,
1158
*args, **kwargs)
1159
1160
def start_checker(self, *args, **kwargs):
1161
old_checker = self.checker
1162
if self.checker is not None:
1163
old_checker_pid = self.checker.pid
1164
else:
1165
old_checker_pid = None
1166
r = Client.start_checker(self, *args, **kwargs)
1167
# Only if new checker process was started
1168
if (self.checker is not None
1169
and old_checker_pid != self.checker.pid):
1170
# Emit D-Bus signal
1171
self.CheckerStarted(self.current_checker_command)
1172
return r
1173
1174
def _reset_approved(self):
1175
self.approved = None
1176
return False
1177
1178
def approve(self, value=True):
1179
self.send_changedstate()
1180
self.approved = value
1181
gobject.timeout_add(timedelta_to_milliseconds
1182
(self.approval_duration),
1183
self._reset_approved)
1184
1185
1186
## D-Bus methods, signals & properties
1187
_interface = "se.recompile.Mandos.Client"
1188
1189
## Signals
459
if self.use_dbus:
460
self.PropertyChanged(dbus.String(u"checker_running"),
461
dbus.Boolean(False, variant_level=1))
462
463
def still_valid(self):
464
"""Has the timeout not yet passed for this client?"""
465
if not getattr(self, "enabled", False):
466
return False
467
now = datetime.datetime.utcnow()
468
if self.last_checked_ok is None:
469
return now < (self.created + self.timeout)
470
else:
471
return now < (self.last_checked_ok + self.timeout)
472
473
## D-Bus methods & signals
474
_interface = u"se.bsnet.fukt.Mandos.Client"
475
476
# CheckedOK - method
477
CheckedOK = dbus.service.method(_interface)(checked_ok)
478
CheckedOK.__name__ = "CheckedOK"
1190
479
1191
480
# CheckerCompleted - signal
1192
481
@dbus.service.signal(_interface, signature="nxs")
1200
489
"D-Bus signal"
1201
490
pass
1202
491
492
# GetAllProperties - method
493
@dbus.service.method(_interface, out_signature="a{sv}")
494
def GetAllProperties(self):
495
"D-Bus method"
496
return dbus.Dictionary({
497
dbus.String("name"):
498
dbus.String(self.name, variant_level=1),
499
dbus.String("fingerprint"):
500
dbus.String(self.fingerprint, variant_level=1),
501
dbus.String("host"):
502
dbus.String(self.host, variant_level=1),
503
dbus.String("created"):
504
_datetime_to_dbus(self.created, variant_level=1),
505
dbus.String("last_enabled"):
506
(_datetime_to_dbus(self.last_enabled,
507
variant_level=1)
508
if self.last_enabled is not None
509
else dbus.Boolean(False, variant_level=1)),
510
dbus.String("enabled"):
511
dbus.Boolean(self.enabled, variant_level=1),
512
dbus.String("last_checked_ok"):
513
(_datetime_to_dbus(self.last_checked_ok,
514
variant_level=1)
515
if self.last_checked_ok is not None
516
else dbus.Boolean (False, variant_level=1)),
517
dbus.String("timeout"):
518
dbus.UInt64(self.timeout_milliseconds(),
519
variant_level=1),
520
dbus.String("interval"):
521
dbus.UInt64(self.interval_milliseconds(),
522
variant_level=1),
523
dbus.String("checker"):
524
dbus.String(self.checker_command,
525
variant_level=1),
526
dbus.String("checker_running"):
527
dbus.Boolean(self.checker is not None,
528
variant_level=1),
529
dbus.String("object_path"):
530
dbus.ObjectPath(self.dbus_object_path,
531
variant_level=1)
532
}, signature="sv")
533
534
# IsStillValid - method
535
IsStillValid = (dbus.service.method(_interface, out_signature="b")
536
(still_valid))
537
IsStillValid.__name__ = "IsStillValid"
538
1203
539
# PropertyChanged - signal
1204
540
@dbus.service.signal(_interface, signature="sv")
1205
541
def PropertyChanged(self, property, value):
1206
542
"D-Bus signal"
1207
543
pass
1208
544
1209
# GotSecret - signal
1210
@dbus.service.signal(_interface)
1211
def GotSecret(self):
1212
"""D-Bus signal
1213
Is sent after a successful transfer of secret from the Mandos
1214
server to mandos-client
1215
"""
1216
pass
1217
1218
# Rejected - signal
1219
@dbus.service.signal(_interface, signature="s")
1220
def Rejected(self, reason):
1221
"D-Bus signal"
1222
pass
1223
1224
# NeedApproval - signal
1225
@dbus.service.signal(_interface, signature="tb")
1226
def NeedApproval(self, timeout, default):
1227
"D-Bus signal"
1228
return self.need_approval()
1229
1230
# NeRwequest - signal
1231
@dbus.service.signal(_interface, signature="s")
1232
def NewRequest(self, ip):
1233
"""D-Bus signal
1234
Is sent after a client request a password.
1235
"""
1236
pass
1237
1238
## Methods
1239
1240
# Approve - method
1241
@dbus.service.method(_interface, in_signature="b")
1242
def Approve(self, value):
1243
self.approve(value)
1244
1245
# CheckedOK - method
1246
@dbus.service.method(_interface)
1247
def CheckedOK(self):
1248
self.checked_ok()
545
# SetChecker - method
546
@dbus.service.method(_interface, in_signature="s")
547
def SetChecker(self, checker):
548
"D-Bus setter method"
549
self.checker_command = checker
550
# Emit D-Bus signal
551
self.PropertyChanged(dbus.String(u"checker"),
552
dbus.String(self.checker_command,
553
variant_level=1))
554
555
# SetHost - method
556
@dbus.service.method(_interface, in_signature="s")
557
def SetHost(self, host):
558
"D-Bus setter method"
559
self.host = host
560
# Emit D-Bus signal
561
self.PropertyChanged(dbus.String(u"host"),
562
dbus.String(self.host, variant_level=1))
563
564
# SetInterval - method
565
@dbus.service.method(_interface, in_signature="t")
566
def SetInterval(self, milliseconds):
567
self.interval = datetime.timedelta(0, 0, 0, milliseconds)
568
# Emit D-Bus signal
569
self.PropertyChanged(dbus.String(u"interval"),
570
(dbus.UInt64(self.interval_milliseconds(),
571
variant_level=1)))
572
573
# SetSecret - method
574
@dbus.service.method(_interface, in_signature="ay",
575
byte_arrays=True)
576
def SetSecret(self, secret):
577
"D-Bus setter method"
578
self.secret = str(secret)
579
580
# SetTimeout - method
581
@dbus.service.method(_interface, in_signature="t")
582
def SetTimeout(self, milliseconds):
583
self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
584
# Emit D-Bus signal
585
self.PropertyChanged(dbus.String(u"timeout"),
586
(dbus.UInt64(self.timeout_milliseconds(),
587
variant_level=1)))
1249
588
1250
589
# Enable - method
1251
@dbus.service.method(_interface)
1252
def Enable(self):
1253
"D-Bus method"
1254
self.enable()
590
Enable = dbus.service.method(_interface)(enable)
591
Enable.__name__ = "Enable"
1255
592
1256
593
# StartChecker - method
1257
594
@dbus.service.method(_interface)
1266
603
self.disable()
1267
604
1268
605
# StopChecker - method
1269
@dbus.service.method(_interface)
1270
def StopChecker(self):
1271
self.stop_checker()
1272
1273
## Properties
1274
1275
# ApprovalPending - property
1276
@dbus_service_property(_interface, signature="b", access="read")
1277
def ApprovalPending_dbus_property(self):
1278
return dbus.Boolean(bool(self.approvals_pending))
1279
1280
# ApprovedByDefault - property
1281
@dbus_service_property(_interface, signature="b",
1282
access="readwrite")
1283
def ApprovedByDefault_dbus_property(self, value=None):
1284
if value is None: # get
1285
return dbus.Boolean(self.approved_by_default)
1286
self.approved_by_default = bool(value)
1287
1288
# ApprovalDelay - property
1289
@dbus_service_property(_interface, signature="t",
1290
access="readwrite")
1291
def ApprovalDelay_dbus_property(self, value=None):
1292
if value is None: # get
1293
return dbus.UInt64(self.approval_delay_milliseconds())
1294
self.approval_delay = datetime.timedelta(0, 0, 0, value)
1295
1296
# ApprovalDuration - property
1297
@dbus_service_property(_interface, signature="t",
1298
access="readwrite")
1299
def ApprovalDuration_dbus_property(self, value=None):
1300
if value is None: # get
1301
return dbus.UInt64(timedelta_to_milliseconds(
1302
self.approval_duration))
1303
self.approval_duration = datetime.timedelta(0, 0, 0, value)
1304
1305
# Name - property
1306
@dbus_service_property(_interface, signature="s", access="read")
1307
def Name_dbus_property(self):
1308
return dbus.String(self.name)
1309
1310
# Fingerprint - property
1311
@dbus_service_property(_interface, signature="s", access="read")
1312
def Fingerprint_dbus_property(self):
1313
return dbus.String(self.fingerprint)
1314
1315
# Host - property
1316
@dbus_service_property(_interface, signature="s",
1317
access="readwrite")
1318
def Host_dbus_property(self, value=None):
1319
if value is None: # get
1320
return dbus.String(self.host)
1321
self.host = unicode(value)
1322
1323
# Created - property
1324
@dbus_service_property(_interface, signature="s", access="read")
1325
def Created_dbus_property(self):
1326
return datetime_to_dbus(self.created)
1327
1328
# LastEnabled - property
1329
@dbus_service_property(_interface, signature="s", access="read")
1330
def LastEnabled_dbus_property(self):
1331
return datetime_to_dbus(self.last_enabled)
1332
1333
# Enabled - property
1334
@dbus_service_property(_interface, signature="b",
1335
access="readwrite")
1336
def Enabled_dbus_property(self, value=None):
1337
if value is None: # get
1338
return dbus.Boolean(self.enabled)
1339
if value:
1340
self.enable()
1341
else:
1342
self.disable()
1343
1344
# LastCheckedOK - property
1345
@dbus_service_property(_interface, signature="s",
1346
access="readwrite")
1347
def LastCheckedOK_dbus_property(self, value=None):
1348
if value is not None:
1349
self.checked_ok()
1350
return
1351
return datetime_to_dbus(self.last_checked_ok)
1352
1353
# Expires - property
1354
@dbus_service_property(_interface, signature="s", access="read")
1355
def Expires_dbus_property(self):
1356
return datetime_to_dbus(self.expires)
1357
1358
# LastApprovalRequest - property
1359
@dbus_service_property(_interface, signature="s", access="read")
1360
def LastApprovalRequest_dbus_property(self):
1361
return datetime_to_dbus(self.last_approval_request)
1362
1363
# Timeout - property
1364
@dbus_service_property(_interface, signature="t",
1365
access="readwrite")
1366
def Timeout_dbus_property(self, value=None):
1367
if value is None: # get
1368
return dbus.UInt64(self.timeout_milliseconds())
1369
self.timeout = datetime.timedelta(0, 0, 0, value)
1370
# Reschedule timeout
1371
if self.enabled:
1372
now = datetime.datetime.utcnow()
1373
time_to_die = timedelta_to_milliseconds(
1374
(self.last_checked_ok + self.timeout) - now)
1375
if time_to_die <= 0:
1376
# The timeout has passed
1377
self.disable()
1378
else:
1379
self.expires = (now +
1380
datetime.timedelta(milliseconds =
1381
time_to_die))
1382
if (getattr(self, "disable_initiator_tag", None)
1383
is None):
1384
return
1385
gobject.source_remove(self.disable_initiator_tag)
1386
self.disable_initiator_tag = (gobject.timeout_add
1387
(time_to_die,
1388
self.disable))
1389
1390
# ExtendedTimeout - property
1391
@dbus_service_property(_interface, signature="t",
1392
access="readwrite")
1393
def ExtendedTimeout_dbus_property(self, value=None):
1394
if value is None: # get
1395
return dbus.UInt64(self.extended_timeout_milliseconds())
1396
self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1397
1398
# Interval - property
1399
@dbus_service_property(_interface, signature="t",
1400
access="readwrite")
1401
def Interval_dbus_property(self, value=None):
1402
if value is None: # get
1403
return dbus.UInt64(self.interval_milliseconds())
1404
self.interval = datetime.timedelta(0, 0, 0, value)
1405
if getattr(self, "checker_initiator_tag", None) is None:
1406
return
1407
if self.enabled:
1408
# Reschedule checker run
1409
gobject.source_remove(self.checker_initiator_tag)
1410
self.checker_initiator_tag = (gobject.timeout_add
1411
(value, self.start_checker))
1412
self.start_checker() # Start one now, too
1413
1414
# Checker - property
1415
@dbus_service_property(_interface, signature="s",
1416
access="readwrite")
1417
def Checker_dbus_property(self, value=None):
1418
if value is None: # get
1419
return dbus.String(self.checker_command)
1420
self.checker_command = unicode(value)
1421
1422
# CheckerRunning - property
1423
@dbus_service_property(_interface, signature="b",
1424
access="readwrite")
1425
def CheckerRunning_dbus_property(self, value=None):
1426
if value is None: # get
1427
return dbus.Boolean(self.checker is not None)
1428
if value:
1429
self.start_checker()
1430
else:
1431
self.stop_checker()
1432
1433
# ObjectPath - property
1434
@dbus_service_property(_interface, signature="o", access="read")
1435
def ObjectPath_dbus_property(self):
1436
return self.dbus_object_path # is already a dbus.ObjectPath
1437
1438
# Secret = property
1439
@dbus_service_property(_interface, signature="ay",
1440
access="write", byte_arrays=True)
1441
def Secret_dbus_property(self, value):
1442
self.secret = str(value)
606
StopChecker = dbus.service.method(_interface)(stop_checker)
607
StopChecker.__name__ = "StopChecker"
1443
608
1444
609
del _interface
1445
610
1446
611
1447
class ProxyClient(object):
1448
def __init__(self, child_pipe, fpr, address):
1449
self._pipe = child_pipe
1450
self._pipe.send(('init', fpr, address))
1451
if not self._pipe.recv():
1452
raise KeyError()
1453
1454
def __getattribute__(self, name):
1455
if name == '_pipe':
1456
return super(ProxyClient, self).__getattribute__(name)
1457
self._pipe.send(('getattr', name))
1458
data = self._pipe.recv()
1459
if data[0] == 'data':
1460
return data[1]
1461
if data[0] == 'function':
1462
def func(*args, **kwargs):
1463
self._pipe.send(('funcall', name, args, kwargs))
1464
return self._pipe.recv()[1]
1465
return func
1466
1467
def __setattr__(self, name, value):
1468
if name == '_pipe':
1469
return super(ProxyClient, self).__setattr__(name, value)
1470
self._pipe.send(('setattr', name, value))
1471
1472
1473
class ClientDBusTransitional(ClientDBus):
1474
__metaclass__ = AlternateDBusNamesMetaclass
1475
1476
1477
class ClientHandler(socketserver.BaseRequestHandler, object):
1478
"""A class to handle client connections.
1479
1480
Instantiated once for each connection to handle it.
612
def peer_certificate(session):
613
"Return the peer's OpenPGP certificate as a bytestring"
614
# If not an OpenPGP certificate...
615
if (gnutls.library.functions
616
.gnutls_certificate_type_get(session._c_object)
617
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
618
# ...do the normal thing
619
return session.peer_certificate
620
list_size = ctypes.c_uint(1)
621
cert_list = (gnutls.library.functions
622
.gnutls_certificate_get_peers
623
(session._c_object, ctypes.byref(list_size)))
624
if not bool(cert_list) and list_size.value != 0:
625
raise gnutls.errors.GNUTLSError("error getting peer"
626
" certificate")
627
if list_size.value == 0:
628
return None
629
cert = cert_list[0]
630
return ctypes.string_at(cert.data, cert.size)
631
632
633
def fingerprint(openpgp):
634
"Convert an OpenPGP bytestring to a hexdigit fingerprint string"
635
# New GnuTLS "datum" with the OpenPGP public key
636
datum = (gnutls.library.types
637
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
638
ctypes.POINTER
639
(ctypes.c_ubyte)),
640
ctypes.c_uint(len(openpgp))))
641
# New empty GnuTLS certificate
642
crt = gnutls.library.types.gnutls_openpgp_crt_t()
643
(gnutls.library.functions
644
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
645
# Import the OpenPGP public key into the certificate
646
(gnutls.library.functions
647
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
648
gnutls.library.constants
649
.GNUTLS_OPENPGP_FMT_RAW))
650
# Verify the self signature in the key
651
crtverify = ctypes.c_uint()
652
(gnutls.library.functions
653
.gnutls_openpgp_crt_verify_self(crt, 0, ctypes.byref(crtverify)))
654
if crtverify.value != 0:
655
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
656
raise gnutls.errors.CertificateSecurityError("Verify failed")
657
# New buffer for the fingerprint
658
buf = ctypes.create_string_buffer(20)
659
buf_len = ctypes.c_size_t()
660
# Get the fingerprint from the certificate into the buffer
661
(gnutls.library.functions
662
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
663
ctypes.byref(buf_len)))
664
# Deinit the certificate
665
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
666
# Convert the buffer to a Python bytestring
667
fpr = ctypes.string_at(buf, buf_len.value)
668
# Convert the bytestring to hexadecimal notation
669
hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
670
return hex_fpr
671
672
673
class TCP_handler(SocketServer.BaseRequestHandler, object):
674
"""A TCP request handler class.
675
Instantiated by IPv6_TCPServer for each request to handle it.
1481
676
Note: This will run in its own forked process."""
1482
677
1483
678
def handle(self):
1484
with contextlib.closing(self.server.child_pipe) as child_pipe:
1485
logger.info("TCP connection from: %s",
1486
unicode(self.client_address))
1487
logger.debug("Pipe FD: %d",
1488
self.server.child_pipe.fileno())
1489
1490
session = (gnutls.connection
1491
.ClientSession(self.request,
1492
gnutls.connection
1493
.X509Credentials()))
1494
1495
# Note: gnutls.connection.X509Credentials is really a
1496
# generic GnuTLS certificate credentials object so long as
1497
# no X.509 keys are added to it. Therefore, we can use it
1498
# here despite using OpenPGP certificates.
1499
1500
#priority = ':'.join(("NONE", "+VERS-TLS1.1",
1501
# "+AES-256-CBC", "+SHA1",
1502
# "+COMP-NULL", "+CTYPE-OPENPGP",
1503
# "+DHE-DSS"))
1504
# Use a fallback default, since this MUST be set.
1505
priority = self.server.gnutls_priority
1506
if priority is None:
1507
priority = "NORMAL"
1508
(gnutls.library.functions
1509
.gnutls_priority_set_direct(session._c_object,
1510
priority, None))
1511
1512
# Start communication using the Mandos protocol
1513
# Get protocol number
1514
line = self.request.makefile().readline()
1515
logger.debug("Protocol version: %r", line)
1516
try:
1517
if int(line.strip().split()[0]) > 1:
1518
raise RuntimeError
1519
except (ValueError, IndexError, RuntimeError) as error:
1520
logger.error("Unknown protocol version: %s", error)
1521
return
1522
1523
# Start GnuTLS connection
1524
try:
1525
session.handshake()
1526
except gnutls.errors.GNUTLSError as error:
1527
logger.warning("Handshake failed: %s", error)
1528
# Do not run session.bye() here: the session is not
1529
# established. Just abandon the request.
1530
return
1531
logger.debug("Handshake succeeded")
1532
1533
approval_required = False
1534
try:
1535
try:
1536
fpr = self.fingerprint(self.peer_certificate
1537
(session))
1538
except (TypeError,
1539
gnutls.errors.GNUTLSError) as error:
1540
logger.warning("Bad certificate: %s", error)
1541
return
1542
logger.debug("Fingerprint: %s", fpr)
1543
1544
try:
1545
client = ProxyClient(child_pipe, fpr,
1546
self.client_address)
1547
except KeyError:
1548
return
1549
1550
if self.server.use_dbus:
1551
# Emit D-Bus signal
1552
client.NewRequest(str(self.client_address))
1553
1554
if client.approval_delay:
1555
delay = client.approval_delay
1556
client.approvals_pending += 1
1557
approval_required = True
1558
1559
while True:
1560
if not client.enabled:
1561
logger.info("Client %s is disabled",
1562
client.name)
1563
if self.server.use_dbus:
1564
# Emit D-Bus signal
1565
client.Rejected("Disabled")
1566
return
1567
1568
if client.approved or not client.approval_delay:
1569
#We are approved or approval is disabled
1570
break
1571
elif client.approved is None:
1572
logger.info("Client %s needs approval",
1573
client.name)
1574
if self.server.use_dbus:
1575
# Emit D-Bus signal
1576
client.NeedApproval(
1577
client.approval_delay_milliseconds(),
1578
client.approved_by_default)
1579
else:
1580
logger.warning("Client %s was not approved",
1581
client.name)
1582
if self.server.use_dbus:
1583
# Emit D-Bus signal
1584
client.Rejected("Denied")
1585
return
1586
1587
#wait until timeout or approved
1588
time = datetime.datetime.now()
1589
client.changedstate.acquire()
1590
(client.changedstate.wait
1591
(float(client.timedelta_to_milliseconds(delay)
1592
/ 1000)))
1593
client.changedstate.release()
1594
time2 = datetime.datetime.now()
1595
if (time2 - time) >= delay:
1596
if not client.approved_by_default:
1597
logger.warning("Client %s timed out while"
1598
" waiting for approval",
1599
client.name)
1600
if self.server.use_dbus:
1601
# Emit D-Bus signal
1602
client.Rejected("Approval timed out")
1603
return
1604
else:
1605
break
1606
else:
1607
delay -= time2 - time
1608
1609
sent_size = 0
1610
while sent_size < len(client.secret):
1611
try:
1612
sent = session.send(client.secret[sent_size:])
1613
except gnutls.errors.GNUTLSError as error:
1614
logger.warning("gnutls send failed")
1615
return
1616
logger.debug("Sent: %d, remaining: %d",
1617
sent, len(client.secret)
1618
- (sent_size + sent))
1619
sent_size += sent
1620
1621
logger.info("Sending secret to %s", client.name)
1622
# bump the timeout using extended_timeout
1623
client.checked_ok(client.extended_timeout)
1624
if self.server.use_dbus:
1625
# Emit D-Bus signal
1626
client.GotSecret()
1627
1628
finally:
1629
if approval_required:
1630
client.approvals_pending -= 1
1631
try:
1632
session.bye()
1633
except gnutls.errors.GNUTLSError as error:
1634
logger.warning("GnuTLS bye failed")
1635
1636
@staticmethod
1637
def peer_certificate(session):
1638
"Return the peer's OpenPGP certificate as a bytestring"
1639
# If not an OpenPGP certificate...
1640
if (gnutls.library.functions
1641
.gnutls_certificate_type_get(session._c_object)
1642
!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1643
# ...do the normal thing
1644
return session.peer_certificate
1645
list_size = ctypes.c_uint(1)
1646
cert_list = (gnutls.library.functions
1647
.gnutls_certificate_get_peers
1648
(session._c_object, ctypes.byref(list_size)))
1649
if not bool(cert_list) and list_size.value != 0:
1650
raise gnutls.errors.GNUTLSError("error getting peer"
1651
" certificate")
1652
if list_size.value == 0:
1653
return None
1654
cert = cert_list[0]
1655
return ctypes.string_at(cert.data, cert.size)
1656
1657
@staticmethod
1658
def fingerprint(openpgp):
1659
"Convert an OpenPGP bytestring to a hexdigit fingerprint"
1660
# New GnuTLS "datum" with the OpenPGP public key
1661
datum = (gnutls.library.types
1662
.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1663
ctypes.POINTER
1664
(ctypes.c_ubyte)),
1665
ctypes.c_uint(len(openpgp))))
1666
# New empty GnuTLS certificate
1667
crt = gnutls.library.types.gnutls_openpgp_crt_t()
1668
(gnutls.library.functions
1669
.gnutls_openpgp_crt_init(ctypes.byref(crt)))
1670
# Import the OpenPGP public key into the certificate
1671
(gnutls.library.functions
1672
.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1673
gnutls.library.constants
1674
.GNUTLS_OPENPGP_FMT_RAW))
1675
# Verify the self signature in the key
1676
crtverify = ctypes.c_uint()
1677
(gnutls.library.functions
1678
.gnutls_openpgp_crt_verify_self(crt, 0,
1679
ctypes.byref(crtverify)))
1680
if crtverify.value != 0:
1681
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1682
raise (gnutls.errors.CertificateSecurityError
1683
("Verify failed"))
1684
# New buffer for the fingerprint
1685
buf = ctypes.create_string_buffer(20)
1686
buf_len = ctypes.c_size_t()
1687
# Get the fingerprint from the certificate into the buffer
1688
(gnutls.library.functions
1689
.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1690
ctypes.byref(buf_len)))
1691
# Deinit the certificate
1692
gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1693
# Convert the buffer to a Python bytestring
1694
fpr = ctypes.string_at(buf, buf_len.value)
1695
# Convert the bytestring to hexadecimal notation
1696
hex_fpr = binascii.hexlify(fpr).upper()
1697
return hex_fpr
1698
1699
1700
class MultiprocessingMixIn(object):
1701
"""Like socketserver.ThreadingMixIn, but with multiprocessing"""
1702
def sub_process_main(self, request, address):
1703
try:
1704
self.finish_request(request, address)
1705
except Exception:
1706
self.handle_error(request, address)
1707
self.close_request(request)
1708
1709
def process_request(self, request, address):
1710
"""Start a new process to process the request."""
1711
proc = multiprocessing.Process(target = self.sub_process_main,
1712
args = (request,
1713
address))
1714
proc.start()
1715
return proc
1716
1717
1718
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1719
""" adds a pipe to the MixIn """
1720
def process_request(self, request, client_address):
1721
"""Overrides and wraps the original process_request().
1722
1723
This function creates a new pipe in self.pipe
1724
"""
1725
parent_pipe, self.child_pipe = multiprocessing.Pipe()
1726
1727
proc = MultiprocessingMixIn.process_request(self, request,
1728
client_address)
1729
self.child_pipe.close()
1730
self.add_pipe(parent_pipe, proc)
1731
1732
def add_pipe(self, parent_pipe, proc):
1733
"""Dummy function; override as necessary"""
1734
raise NotImplementedError
1735
1736
1737
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1738
socketserver.TCPServer, object):
679
logger.info(u"TCP connection from: %s",
680
unicode(self.client_address))
681
session = (gnutls.connection
682
.ClientSession(self.request,
683
gnutls.connection
684
.X509Credentials()))
685
686
line = self.request.makefile().readline()
687
logger.debug(u"Protocol version: %r", line)
688
try:
689
if int(line.strip().split()[0]) > 1:
690
raise RuntimeError
691
except (ValueError, IndexError, RuntimeError), error:
692
logger.error(u"Unknown protocol version: %s", error)
693
return
694
695
# Note: gnutls.connection.X509Credentials is really a generic
696
# GnuTLS certificate credentials object so long as no X.509
697
# keys are added to it. Therefore, we can use it here despite
698
# using OpenPGP certificates.
699
700
#priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
701
# "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
702
# "+DHE-DSS"))
703
# Use a fallback default, since this MUST be set.
704
priority = self.server.settings.get("priority", "NORMAL")
705
(gnutls.library.functions
706
.gnutls_priority_set_direct(session._c_object,
707
priority, None))
708
709
try:
710
session.handshake()
711
except gnutls.errors.GNUTLSError, error:
712
logger.warning(u"Handshake failed: %s", error)
713
# Do not run session.bye() here: the session is not
714
# established. Just abandon the request.
715
return
716
logger.debug(u"Handshake succeeded")
717
try:
718
fpr = fingerprint(peer_certificate(session))
719
except (TypeError, gnutls.errors.GNUTLSError), error:
720
logger.warning(u"Bad certificate: %s", error)
721
session.bye()
722
return
723
logger.debug(u"Fingerprint: %s", fpr)
724
725
for c in self.server.clients:
726
if c.fingerprint == fpr:
727
client = c
728
break
729
else:
730
logger.warning(u"Client not found for fingerprint: %s",
731
fpr)
732
session.bye()
733
return
734
# Have to check if client.still_valid(), since it is possible
735
# that the client timed out while establishing the GnuTLS
736
# session.
737
if not client.still_valid():
738
logger.warning(u"Client %(name)s is invalid",
739
vars(client))
740
session.bye()
741
return
742
## This won't work here, since we're in a fork.
743
# client.checked_ok()
744
sent_size = 0
745
while sent_size < len(client.secret):
746
sent = session.send(client.secret[sent_size:])
747
logger.debug(u"Sent: %d, remaining: %d",
748
sent, len(client.secret)
749
- (sent_size + sent))
750
sent_size += sent
751
session.bye()
752
753
754
class IPv6_TCPServer(SocketServer.ForkingMixIn,
755
SocketServer.TCPServer, object):
1739
756
"""IPv6-capable TCP server. Accepts 'None' as address and/or port
1740
1741
757
Attributes:
758
settings: Server settings
759
clients: Set() of Client objects
1742
760
enabled: Boolean; whether this server is activated yet
1743
interface: None or a network interface name (string)
1744
use_ipv6: Boolean; to use IPv6 or not
1745
761
"""
1746
def __init__(self, server_address, RequestHandlerClass,
1747
interface=None, use_ipv6=True):
1748
self.interface = interface
1749
if use_ipv6:
1750
self.address_family = socket.AF_INET6
1751
socketserver.TCPServer.__init__(self, server_address,
1752
RequestHandlerClass)
762
address_family = socket.AF_INET6
763
def __init__(self, *args, **kwargs):
764
if "settings" in kwargs:
765
self.settings = kwargs["settings"]
766
del kwargs["settings"]
767
if "clients" in kwargs:
768
self.clients = kwargs["clients"]
769
del kwargs["clients"]
770
if "use_ipv6" in kwargs:
771
if not kwargs["use_ipv6"]:
772
self.address_family = socket.AF_INET
773
del kwargs["use_ipv6"]
774
self.enabled = False
775
super(IPv6_TCPServer, self).__init__(*args, **kwargs)
1753
776
def server_bind(self):
1754
777
"""This overrides the normal server_bind() function
1755
778
to bind to an interface if one was specified, and also NOT to
1756
779
bind to an address or port if they were not specified."""
1757
if self.interface is not None:
1758
if SO_BINDTODEVICE is None:
1759
logger.error("SO_BINDTODEVICE does not exist;"
1760
" cannot bind to interface %s",
1761
self.interface)
1762
else:
1763
try:
1764
self.socket.setsockopt(socket.SOL_SOCKET,
1765
SO_BINDTODEVICE,
1766
str(self.interface
1767
+ '\0'))
1768
except socket.error as error:
1769
if error[0] == errno.EPERM:
1770
logger.error("No permission to"
1771
" bind to interface %s",
1772
self.interface)
1773
elif error[0] == errno.ENOPROTOOPT:
1774
logger.error("SO_BINDTODEVICE not available;"
1775
" cannot bind to interface %s",
1776
self.interface)
1777
else:
1778
raise
780
if self.settings["interface"]:
781
# 25 is from /usr/include/asm-i486/socket.h
782
SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
783
try:
784
self.socket.setsockopt(socket.SOL_SOCKET,
785
SO_BINDTODEVICE,
786
self.settings["interface"])
787
except socket.error, error:
788
if error[0] == errno.EPERM:
789
logger.error(u"No permission to"
790
u" bind to interface %s",
791
self.settings["interface"])
792
else:
793
raise
1779
794
# Only bind(2) the socket if we really need to.
1780
795
if self.server_address[0] or self.server_address[1]:
1781
796
if not self.server_address[0]:
1788
803
elif not self.server_address[1]:
1789
804
self.server_address = (self.server_address[0],
1790
805
0)
1791
# if self.interface:
806
# if self.settings["interface"]:
1792
807
# self.server_address = (self.server_address[0],
1793
808
# 0, # port
1794
809
# 0, # flowinfo
1795
810
# if_nametoindex
1796
# (self.interface))
1797
return socketserver.TCPServer.server_bind(self)
1798
1799
1800
class MandosServer(IPv6_TCPServer):
1801
"""Mandos server.
1802
1803
Attributes:
1804
clients: set of Client objects
1805
gnutls_priority GnuTLS priority string
1806
use_dbus: Boolean; to emit D-Bus signals or not
1807
1808
Assumes a gobject.MainLoop event loop.
1809
"""
1810
def __init__(self, server_address, RequestHandlerClass,
1811
interface=None, use_ipv6=True, clients=None,
1812
gnutls_priority=None, use_dbus=True):
1813
self.enabled = False
1814
self.clients = clients
1815
if self.clients is None:
1816
self.clients = {}
1817
self.use_dbus = use_dbus
1818
self.gnutls_priority = gnutls_priority
1819
IPv6_TCPServer.__init__(self, server_address,
1820
RequestHandlerClass,
1821
interface = interface,
1822
use_ipv6 = use_ipv6)
811
# (self.settings
812
# ["interface"]))
813
return super(IPv6_TCPServer, self).server_bind()
1823
814
def server_activate(self):
1824
815
if self.enabled:
1825
return socketserver.TCPServer.server_activate(self)
1826
816
return super(IPv6_TCPServer, self).server_activate()
1827
817
def enable(self):
1828
818
self.enabled = True
1829
1830
def add_pipe(self, parent_pipe, proc):
1831
# Call "handle_ipc" for both data and EOF events
1832
gobject.io_add_watch(parent_pipe.fileno(),
1833
gobject.IO_IN | gobject.IO_HUP,
1834
functools.partial(self.handle_ipc,
1835
parent_pipe =
1836
parent_pipe,
1837
proc = proc))
1838
1839
def handle_ipc(self, source, condition, parent_pipe=None,
1840
proc = None, client_object=None):
1841
condition_names = {
1842
gobject.IO_IN: "IN", # There is data to read.
1843
gobject.IO_OUT: "OUT", # Data can be written (without
1844
# blocking).
1845
gobject.IO_PRI: "PRI", # There is urgent data to read.
1846
gobject.IO_ERR: "ERR", # Error condition.
1847
gobject.IO_HUP: "HUP" # Hung up (the connection has been
1848
# broken, usually for pipes and
1849
# sockets).
1850
}
1851
conditions_string = ' | '.join(name
1852
for cond, name in
1853
condition_names.iteritems()
1854
if cond & condition)
1855
# error, or the other end of multiprocessing.Pipe has closed
1856
if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
1857
# Wait for other process to exit
1858
proc.join()
1859
return False
1860
1861
# Read a request from the child
1862
request = parent_pipe.recv()
1863
command = request[0]
1864
1865
if command == 'init':
1866
fpr = request[1]
1867
address = request[2]
1868
1869
for c in self.clients.itervalues():
1870
if c.fingerprint == fpr:
1871
client = c
1872
break
1873
else:
1874
logger.info("Client not found for fingerprint: %s, ad"
1875
"dress: %s", fpr, address)
1876
if self.use_dbus:
1877
# Emit D-Bus signal
1878
mandos_dbus_service.ClientNotFound(fpr,
1879
address[0])
1880
parent_pipe.send(False)
1881
return False
1882
1883
gobject.io_add_watch(parent_pipe.fileno(),
1884
gobject.IO_IN | gobject.IO_HUP,
1885
functools.partial(self.handle_ipc,
1886
parent_pipe =
1887
parent_pipe,
1888
proc = proc,
1889
client_object =
1890
client))
1891
parent_pipe.send(True)
1892
# remove the old hook in favor of the new above hook on
1893
# same fileno
1894
return False
1895
if command == 'funcall':
1896
funcname = request[1]
1897
args = request[2]
1898
kwargs = request[3]
1899
1900
parent_pipe.send(('data', getattr(client_object,
1901
funcname)(*args,
1902
**kwargs)))
1903
1904
if command == 'getattr':
1905
attrname = request[1]
1906
if callable(client_object.__getattribute__(attrname)):
1907
parent_pipe.send(('function',))
1908
else:
1909
parent_pipe.send(('data', client_object
1910
.__getattribute__(attrname)))
1911
1912
if command == 'setattr':
1913
attrname = request[1]
1914
value = request[2]
1915
setattr(client_object, attrname, value)
1916
1917
return True
1918
819
1919
820
1920
821
def string_to_delta(interval):
1928
829
datetime.timedelta(0, 3600)
1929
830
>>> string_to_delta('24h')
1930
831
datetime.timedelta(1)
1931
>>> string_to_delta('1w')
832
>>> string_to_delta(u'1w')
1932
833
datetime.timedelta(7)
1933
834
>>> string_to_delta('5m 30s')
1934
835
datetime.timedelta(0, 330)
1938
839
try:
1939
840
suffix = unicode(s[-1])
1940
841
value = int(s[:-1])
1941
if suffix == "d":
842
if suffix == u"d":
1942
843
delta = datetime.timedelta(value)
1943
elif suffix == "s":
844
elif suffix == u"s":
1944
845
delta = datetime.timedelta(0, value)
1945
elif suffix == "m":
846
elif suffix == u"m":
1946
847
delta = datetime.timedelta(0, 0, 0, 0, value)
1947
elif suffix == "h":
848
elif suffix == u"h":
1948
849
delta = datetime.timedelta(0, 0, 0, 0, 0, value)
1949
elif suffix == "w":
850
elif suffix == u"w":
1950
851
delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1951
852
else:
1952
raise ValueError("Unknown suffix %r" % suffix)
1953
except (ValueError, IndexError) as e:
1954
raise ValueError(*(e.args))
853
raise ValueError
854
except (ValueError, IndexError):
855
raise ValueError
1955
856
timevalue += delta
1956
857
return timevalue
1957
858
1958
859
860
def server_state_changed(state):
861
"""Derived from the Avahi example code"""
862
if state == avahi.SERVER_COLLISION:
863
logger.error(u"Zeroconf server name collision")
864
service.remove()
865
elif state == avahi.SERVER_RUNNING:
866
service.add()
867
868
869
def entry_group_state_changed(state, error):
870
"""Derived from the Avahi example code"""
871
logger.debug(u"Avahi state change: %i", state)
872
873
if state == avahi.ENTRY_GROUP_ESTABLISHED:
874
logger.debug(u"Zeroconf service established.")
875
elif state == avahi.ENTRY_GROUP_COLLISION:
876
logger.warning(u"Zeroconf service name collision.")
877
service.rename()
878
elif state == avahi.ENTRY_GROUP_FAILURE:
879
logger.critical(u"Avahi: Error in group state changed %s",
880
unicode(error))
881
raise AvahiGroupError(u"State changed: %s" % unicode(error))
882
883
def if_nametoindex(interface):
884
"""Call the C function if_nametoindex(), or equivalent"""
885
global if_nametoindex
886
try:
887
if_nametoindex = (ctypes.cdll.LoadLibrary
888
(ctypes.util.find_library("c"))
889
.if_nametoindex)
890
except (OSError, AttributeError):
891
if "struct" not in sys.modules:
892
import struct
893
if "fcntl" not in sys.modules:
894
import fcntl
895
def if_nametoindex(interface):
896
"Get an interface index the hard way, i.e. using fcntl()"
897
SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h
898
with closing(socket.socket()) as s:
899
ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
900
struct.pack("16s16x", interface))
901
interface_index = struct.unpack("I", ifreq[16:20])[0]
902
return interface_index
903
return if_nametoindex(interface)
904
905
1959
906
def daemon(nochdir = False, noclose = False):
1960
907
"""See daemon(3). Standard BSD Unix function.
1961
1962
908
This should really exist as os.daemon, but it doesn't (yet)."""
1963
909
if os.fork():
1964
910
sys.exit()
1972
918
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1973
919
if not stat.S_ISCHR(os.fstat(null).st_mode):
1974
920
raise OSError(errno.ENODEV,
1975
"%s not a character device"
1976
% os.path.devnull)
921
"/dev/null not a character device")
1977
922
os.dup2(null, sys.stdin.fileno())
1978
923
os.dup2(null, sys.stdout.fileno())
1979
924
os.dup2(null, sys.stderr.fileno())
1982
927
1983
928
1984
929
def main():
1985
1986
##################################################################
1987
# Parsing of options, both command line and config file
1988
1989
parser = argparse.ArgumentParser()
1990
parser.add_argument("-v", "--version", action="version",
1991
version = "%%(prog)s %s" % version,
1992
help="show version number and exit")
1993
parser.add_argument("-i", "--interface", metavar="IF",
1994
help="Bind to interface IF")
1995
parser.add_argument("-a", "--address",
1996
help="Address to listen for requests on")
1997
parser.add_argument("-p", "--port", type=int,
1998
help="Port number to receive requests on")
1999
parser.add_argument("--check", action="store_true",
2000
help="Run self-test")
2001
parser.add_argument("--debug", action="store_true",
2002
help="Debug mode; run in foreground and log"
2003
" to terminal")
2004
parser.add_argument("--debuglevel", metavar="LEVEL",
2005
help="Debug level for stdout output")
2006
parser.add_argument("--priority", help="GnuTLS"
2007
" priority string (see GnuTLS documentation)")
2008
parser.add_argument("--servicename",
2009
metavar="NAME", help="Zeroconf service name")
2010
parser.add_argument("--configdir",
2011
default="/etc/mandos", metavar="DIR",
2012
help="Directory to search for configuration"
2013
" files")
2014
parser.add_argument("--no-dbus", action="store_false",
2015
dest="use_dbus", help="Do not provide D-Bus"
2016
" system bus interface")
2017
parser.add_argument("--no-ipv6", action="store_false",
2018
dest="use_ipv6", help="Do not use IPv6")
2019
parser.add_argument("--no-restore", action="store_false",
2020
dest="restore", help="Do not restore stored"
2021
" state")
2022
parser.add_argument("--statedir", metavar="DIR",
2023
help="Directory to save/restore state in")
2024
2025
options = parser.parse_args()
930
parser = optparse.OptionParser(version = "%%prog %s" % version)
931
parser.add_option("-i", "--interface", type="string",
932
metavar="IF", help="Bind to interface IF")
933
parser.add_option("-a", "--address", type="string",
934
help="Address to listen for requests on")
935
parser.add_option("-p", "--port", type="int",
936
help="Port number to receive requests on")
937
parser.add_option("--check", action="store_true",
938
help="Run self-test")
939
parser.add_option("--debug", action="store_true",
940
help="Debug mode; run in foreground and log to"
941
" terminal")
942
parser.add_option("--priority", type="string", help="GnuTLS"
943
" priority string (see GnuTLS documentation)")
944
parser.add_option("--servicename", type="string", metavar="NAME",
945
help="Zeroconf service name")
946
parser.add_option("--configdir", type="string",
947
default="/etc/mandos", metavar="DIR",
948
help="Directory to search for configuration"
949
" files")
950
parser.add_option("--no-dbus", action="store_false",
951
dest="use_dbus",
952
help=optparse.SUPPRESS_HELP) # XXX: Not done yet
953
parser.add_option("--no-ipv6", action="store_false",
954
dest="use_ipv6", help="Do not use IPv6")
955
options = parser.parse_args()[0]
2026
956
2027
957
if options.check:
2028
958
import doctest
2039
969
"servicename": "Mandos",
2040
970
"use_dbus": "True",
2041
971
"use_ipv6": "True",
2042
"debuglevel": "",
2043
"restore": "True",
2044
"statedir": "/var/lib/mandos"
2045
972
}
2046
973
2047
974
# Parse config file for server-global settings
2048
server_config = configparser.SafeConfigParser(server_defaults)
975
server_config = ConfigParser.SafeConfigParser(server_defaults)
2049
976
del server_defaults
2050
server_config.read(os.path.join(options.configdir,
2051
"mandos.conf"))
977
server_config.read(os.path.join(options.configdir, "mandos.conf"))
2052
978
# Convert the SafeConfigParser object to a dict
2053
979
server_settings = server_config.defaults()
2054
980
# Use the appropriate methods on the non-string config options
2055
for option in ("debug", "use_dbus", "use_ipv6"):
2056
server_settings[option] = server_config.getboolean("DEFAULT",
2057
option)
981
server_settings["debug"] = server_config.getboolean("DEFAULT",
982
"debug")
983
server_settings["use_dbus"] = server_config.getboolean("DEFAULT",
984
"use_dbus")
985
server_settings["use_ipv6"] = server_config.getboolean("DEFAULT",
986
"use_ipv6")
2058
987
if server_settings["port"]:
2059
988
server_settings["port"] = server_config.getint("DEFAULT",
2060
989
"port")
2064
993
# options, if set.
2065
994
for option in ("interface", "address", "port", "debug",
2066
995
"priority", "servicename", "configdir",
2067
"use_dbus", "use_ipv6", "debuglevel", "restore",
2068
"statedir"):
996
"use_dbus", "use_ipv6"):
2069
997
value = getattr(options, option)
2070
998
if value is not None:
2071
999
server_settings[option] = value
2072
1000
del options
2073
# Force all strings to be unicode
2074
for option in server_settings.keys():
2075
if type(server_settings[option]) is str:
2076
server_settings[option] = unicode(server_settings[option])
2077
1001
# Now we have our good server settings in "server_settings"
2078
1002
2079
##################################################################
2080
2081
1003
# For convenience
2082
1004
debug = server_settings["debug"]
2083
debuglevel = server_settings["debuglevel"]
2084
1005
use_dbus = server_settings["use_dbus"]
1006
use_dbus = False # XXX: Not done yet
2085
1007
use_ipv6 = server_settings["use_ipv6"]
2086
stored_state_path = os.path.join(server_settings["statedir"],
2087
stored_state_file)
2088
1008
2089
if debug:
2090
initlogger(debug, logging.DEBUG)
2091
else:
2092
if not debuglevel:
2093
initlogger(debug)
2094
else:
2095
level = getattr(logging, debuglevel.upper())
2096
initlogger(debug, level)
1009
if not debug:
1010
syslogger.setLevel(logging.WARNING)
1011
console.setLevel(logging.WARNING)
2097
1012
2098
1013
if server_settings["servicename"] != "Mandos":
2099
1014
syslogger.setFormatter(logging.Formatter
2100
('Mandos (%s) [%%(process)d]:'
2101
' %%(levelname)s: %%(message)s'
1015
('Mandos (%s): %%(levelname)s:'
1016
' %%(message)s'
2102
1017
% server_settings["servicename"]))
2103
1018
2104
1019
# Parse config file with clients
2105
client_config = configparser.SafeConfigParser(Client
2106
.client_defaults)
1020
client_defaults = { "timeout": "1h",
1021
"interval": "5m",
1022
"checker": "fping -q -- %%(host)s",
1023
"host": "",
1024
}
1025
client_config = ConfigParser.SafeConfigParser(client_defaults)
2107
1026
client_config.read(os.path.join(server_settings["configdir"],
2108
1027
"clients.conf"))
2109
1028
2110
global mandos_dbus_service
2111
mandos_dbus_service = None
2112
2113
tcp_server = MandosServer((server_settings["address"],
2114
server_settings["port"]),
2115
ClientHandler,
2116
interface=(server_settings["interface"]
2117
or None),
2118
use_ipv6=use_ipv6,
2119
gnutls_priority=
2120
server_settings["priority"],
2121
use_dbus=use_dbus)
2122
if not debug:
2123
pidfilename = "/var/run/mandos.pid"
2124
try:
2125
pidfile = open(pidfilename, "w")
2126
except IOError:
2127
logger.error("Could not open file %r", pidfilename)
1029
clients = Set()
1030
tcp_server = IPv6_TCPServer((server_settings["address"],
1031
server_settings["port"]),
1032
TCP_handler,
1033
settings=server_settings,
1034
clients=clients, use_ipv6=use_ipv6)
1035
pidfilename = "/var/run/mandos.pid"
1036
try:
1037
pidfile = open(pidfilename, "w")
1038
except IOError:
1039
logger.error("Could not open file %r", pidfilename)
2128
1040
2129
1041
try:
2130
1042
uid = pwd.getpwnam("_mandos").pw_uid
2136
1048
except KeyError:
2137
1049
try:
2138
1050
uid = pwd.getpwnam("nobody").pw_uid
2139
gid = pwd.getpwnam("nobody").pw_gid
1051
gid = pwd.getpwnam("nogroup").pw_gid
2140
1052
except KeyError:
2141
1053
uid = 65534
2142
1054
gid = 65534
2143
1055
try:
2144
1056
os.setgid(gid)
2145
1057
os.setuid(uid)
2146
except OSError as error:
1058
except OSError, error:
2147
1059
if error[0] != errno.EPERM:
2148
1060
raise error
2149
1061
1062
# Enable all possible GnuTLS debugging
2150
1063
if debug:
2151
# Enable all possible GnuTLS debugging
2152
2153
1064
# "Use a log level over 10 to enable all debugging options."
2154
1065
# - GnuTLS manual
2155
1066
gnutls.library.functions.gnutls_global_set_log_level(11)
2160
1071
2161
1072
(gnutls.library.functions
2162
1073
.gnutls_global_set_log_function(debug_gnutls))
2163
2164
# Redirect stdin so all checkers get /dev/null
2165
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2166
os.dup2(null, sys.stdin.fileno())
2167
if null > 2:
2168
os.close(null)
2169
2170
# Need to fork before connecting to D-Bus
2171
if not debug:
2172
# Close all input and output, do double fork, etc.
2173
daemon()
2174
2175
gobject.threads_init()
1074
1075
global service
1076
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1077
service = AvahiService(name = server_settings["servicename"],
1078
servicetype = "_mandos._tcp",
1079
protocol = protocol)
1080
if server_settings["interface"]:
1081
service.interface = (if_nametoindex
1082
(server_settings["interface"]))
2176
1083
2177
1084
global main_loop
1085
global bus
1086
global server
2178
1087
# From the Avahi example code
2179
1088
DBusGMainLoop(set_as_default=True )
2180
1089
main_loop = gobject.MainLoop()
2181
1090
bus = dbus.SystemBus()
1091
server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
1092
avahi.DBUS_PATH_SERVER),
1093
avahi.DBUS_INTERFACE_SERVER)
2182
1094
# End of Avahi example code
2183
1095
if use_dbus:
2184
try:
2185
bus_name = dbus.service.BusName("se.recompile.Mandos",
2186
bus, do_not_queue=True)
2187
old_bus_name = (dbus.service.BusName
2188
("se.bsnet.fukt.Mandos", bus,
2189
do_not_queue=True))
2190
except dbus.exceptions.NameExistsException as e:
2191
logger.error(unicode(e) + ", disabling D-Bus")
2192
use_dbus = False
2193
server_settings["use_dbus"] = False
2194
tcp_server.use_dbus = False
2195
protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2196
service = AvahiServiceToSyslog(name =
2197
server_settings["servicename"],
2198
servicetype = "_mandos._tcp",
2199
protocol = protocol, bus = bus)
2200
if server_settings["interface"]:
2201
service.interface = (if_nametoindex
2202
(str(server_settings["interface"])))
2203
2204
global multiprocessing_manager
2205
multiprocessing_manager = multiprocessing.Manager()
2206
2207
client_class = Client
2208
if use_dbus:
2209
client_class = functools.partial(ClientDBusTransitional,
2210
bus = bus)
2211
2212
client_settings = Client.config_parser(client_config)
2213
old_client_settings = {}
2214
clients_data = {}
2215
2216
# Get client data and settings from last running state.
2217
if server_settings["restore"]:
2218
try:
2219
with open(stored_state_path, "rb") as stored_state:
2220
clients_data, old_client_settings = (pickle.load
2221
(stored_state))
2222
os.remove(stored_state_path)
2223
except IOError as e:
2224
logger.warning("Could not load persistent state: {0}"
2225
.format(e))
2226
if e.errno != errno.ENOENT:
2227
raise
2228
except EOFError as e:
2229
logger.warning("Could not load persistent state: "
2230
"EOFError: {0}".format(e))
2231
2232
with PGPEngine() as pgp:
2233
for client_name, client in clients_data.iteritems():
2234
# Decide which value to use after restoring saved state.
2235
# We have three different values: Old config file,
2236
# new config file, and saved state.
2237
# New config value takes precedence if it differs from old
2238
# config value, otherwise use saved state.
2239
for name, value in client_settings[client_name].items():
2240
try:
2241
# For each value in new config, check if it
2242
# differs from the old config value (Except for
2243
# the "secret" attribute)
2244
if (name != "secret" and
2245
value != old_client_settings[client_name]
2246
[name]):
2247
client[name] = value
2248
except KeyError:
2249
pass
2250
2251
# Clients who has passed its expire date can still be
2252
# enabled if its last checker was successful. Clients
2253
# whose checker failed before we stored its state is
2254
# assumed to have failed all checkers during downtime.
2255
if client["enabled"]:
2256
if datetime.datetime.utcnow() >= client["expires"]:
2257
if not client["last_checked_ok"]:
2258
logger.warning(
2259
"disabling client {0} - Client never "
2260
"performed a successfull checker"
2261
.format(client["name"]))
2262
client["enabled"] = False
2263
elif client["last_checker_status"] != 0:
2264
logger.warning(
2265
"disabling client {0} - Client "
2266
"last checker failed with error code {1}"
2267
.format(client["name"],
2268
client["last_checker_status"]))
2269
client["enabled"] = False
2270
else:
2271
client["expires"] = (datetime.datetime
2272
.utcnow()
2273
+ client["timeout"])
2274
logger.debug("Last checker succeeded,"
2275
" keeping {0} enabled"
2276
.format(client["name"]))
2277
try:
2278
client["secret"] = (
2279
pgp.decrypt(client["encrypted_secret"],
2280
client_settings[client_name]
2281
["secret"]))
2282
except PGPError:
2283
# If decryption fails, we use secret from new settings
2284
logger.debug("Failed to decrypt {0} old secret"
2285
.format(client_name))
2286
client["secret"] = (
2287
client_settings[client_name]["secret"])
2288
2289
2290
# Add/remove clients based on new changes made to config
2291
for client_name in (set(old_client_settings)
2292
- set(client_settings)):
2293
del clients_data[client_name]
2294
for client_name in (set(client_settings)
2295
- set(old_client_settings)):
2296
clients_data[client_name] = client_settings[client_name]
2297
2298
# Create clients all clients
2299
for client_name, client in clients_data.iteritems():
2300
tcp_server.clients[client_name] = client_class(
2301
name = client_name, settings = client)
2302
2303
if not tcp_server.clients:
2304
logger.warning("No clients defined")
1096
bus_name = dbus.service.BusName(u"se.bsnet.fukt.Mandos", bus)
1097
1098
clients.update(Set(Client(name = section,
1099
config
1100
= dict(client_config.items(section)),
1101
use_dbus = use_dbus)
1102
for section in client_config.sections()))
1103
if not clients:
1104
logger.warning(u"No clients defined")
1105
1106
if debug:
1107
# Redirect stdin so all checkers get /dev/null
1108
null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1109
os.dup2(null, sys.stdin.fileno())
1110
if null > 2:
1111
os.close(null)
1112
else:
1113
# No console logging
1114
logger.removeHandler(console)
1115
# Close all input and output, do double fork, etc.
1116
daemon()
1117
1118
try:
1119
pid = os.getpid()
1120
pidfile.write(str(pid) + "\n")
1121
pidfile.close()
1122
del pidfile
1123
except IOError:
1124
logger.error(u"Could not write to file %r with PID %d",
1125
pidfilename, pid)
1126
except NameError:
1127
# "pidfile" was never created
1128
pass
1129
del pidfilename
1130
1131
def cleanup():
1132
"Cleanup function; run on exit"
1133
global group
1134
# From the Avahi example code
1135
if not group is None:
1136
group.Free()
1137
group = None
1138
# End of Avahi example code
2305
1139
1140
while clients:
1141
client = clients.pop()
1142
client.disable_hook = None
1143
client.disable()
1144
1145
atexit.register(cleanup)
1146
2306
1147
if not debug:
2307
try:
2308
with pidfile:
2309
pid = os.getpid()
2310
pidfile.write(str(pid) + "\n".encode("utf-8"))
2311
del pidfile
2312
except IOError:
2313
logger.error("Could not write to file %r with PID %d",
2314
pidfilename, pid)
2315
except NameError:
2316
# "pidfile" was never created
2317
pass
2318
del pidfilename
2319
1148
signal.signal(signal.SIGINT, signal.SIG_IGN)
2320
2321
1149
signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2322
1150
signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2323
1151
2324
1152
if use_dbus:
2325
class MandosDBusService(dbus.service.Object):
1153
class MandosServer(dbus.service.Object):
2326
1154
"""A D-Bus proxy object"""
2327
1155
def __init__(self):
2328
1156
dbus.service.Object.__init__(self, bus, "/")
2329
_interface = "se.recompile.Mandos"
2330
2331
@dbus.service.signal(_interface, signature="o")
2332
def ClientAdded(self, objpath):
2333
"D-Bus signal"
2334
pass
2335
2336
@dbus.service.signal(_interface, signature="ss")
2337
def ClientNotFound(self, fingerprint, address):
1157
_interface = u"se.bsnet.fukt.Mandos"
1158
1159
@dbus.service.signal(_interface, signature="oa{sv}")
1160
def ClientAdded(self, objpath, properties):
2338
1161
"D-Bus signal"
2339
1162
pass
2340
1163
2346
1169
@dbus.service.method(_interface, out_signature="ao")
2347
1170
def GetAllClients(self):
2348
1171
"D-Bus method"
2349
return dbus.Array(c.dbus_object_path
2350
for c in
2351
tcp_server.clients.itervalues())
1172
return dbus.Array(c.dbus_object_path for c in clients)
2352
1173
2353
@dbus.service.method(_interface,
2354
out_signature="a{oa{sv}}")
1174
@dbus.service.method(_interface, out_signature="a{oa{sv}}")
2355
1175
def GetAllClientsWithProperties(self):
2356
1176
"D-Bus method"
2357
1177
return dbus.Dictionary(
2358
((c.dbus_object_path, c.GetAll(""))
2359
for c in tcp_server.clients.itervalues()),
1178
((c.dbus_object_path, c.GetAllProperties())
1179
for c in clients),
2360
1180
signature="oa{sv}")
2361
1181
2362
1182
@dbus.service.method(_interface, in_signature="o")
2363
1183
def RemoveClient(self, object_path):
2364
1184
"D-Bus method"
2365
for c in tcp_server.clients.itervalues():
1185
for c in clients:
2366
1186
if c.dbus_object_path == object_path:
2367
del tcp_server.clients[c.name]
2368
c.remove_from_connection()
1187
clients.remove(c)
2369
1188
# Don't signal anything except ClientRemoved
2370
c.disable(quiet=True)
1189
c.use_dbus = False
1190
c.disable()
2371
1191
# Emit D-Bus signal
2372
1192
self.ClientRemoved(object_path, c.name)
2373
1193
return
2374
raise KeyError(object_path)
1194
raise KeyError
2375
1195
2376
1196
del _interface
2377
1197
2378
class MandosDBusServiceTransitional(MandosDBusService):
2379
__metaclass__ = AlternateDBusNamesMetaclass
2380
mandos_dbus_service = MandosDBusServiceTransitional()
2381
2382
def cleanup():
2383
"Cleanup function; run on exit"
2384
service.cleanup()
2385
2386
multiprocessing.active_children()
2387
if not (tcp_server.clients or client_settings):
2388
return
2389
2390
# Store client before exiting. Secrets are encrypted with key
2391
# based on what config file has. If config file is
2392
# removed/edited, old secret will thus be unrecovable.
2393
clients = {}
2394
with PGPEngine() as pgp:
2395
for client in tcp_server.clients.itervalues():
2396
key = client_settings[client.name]["secret"]
2397
client.encrypted_secret = pgp.encrypt(client.secret,
2398
key)
2399
client_dict = {}
2400
2401
# A list of attributes that can not be pickled
2402
# + secret.
2403
exclude = set(("bus", "changedstate", "secret",
2404
"checker"))
2405
for name, typ in (inspect.getmembers
2406
(dbus.service.Object)):
2407
exclude.add(name)
2408
2409
client_dict["encrypted_secret"] = (client
2410
.encrypted_secret)
2411
for attr in client.client_structure:
2412
if attr not in exclude:
2413
client_dict[attr] = getattr(client, attr)
2414
2415
clients[client.name] = client_dict
2416
del client_settings[client.name]["secret"]
2417
2418
try:
2419
tempfd, tempname = tempfile.mkstemp(suffix=".pickle",
2420
prefix="clients-",
2421
dir=os.path.dirname
2422
(stored_state_path))
2423
with os.fdopen(tempfd, "wb") as stored_state:
2424
pickle.dump((clients, client_settings), stored_state)
2425
os.rename(tempname, stored_state_path)
2426
except (IOError, OSError) as e:
2427
logger.warning("Could not save persistent state: {0}"
2428
.format(e))
2429
if not debug:
2430
try:
2431
os.remove(tempname)
2432
except NameError:
2433
pass
2434
if e.errno not in set((errno.ENOENT, errno.EACCES,
2435
errno.EEXIST)):
2436
raise e
2437
2438
# Delete all clients, and settings from config
2439
while tcp_server.clients:
2440
name, client = tcp_server.clients.popitem()
2441
if use_dbus:
2442
client.remove_from_connection()
2443
# Don't signal anything except ClientRemoved
2444
client.disable(quiet=True)
2445
if use_dbus:
2446
# Emit D-Bus signal
2447
mandos_dbus_service.ClientRemoved(client
2448
.dbus_object_path,
2449
client.name)
2450
client_settings.clear()
2451
2452
atexit.register(cleanup)
2453
2454
for client in tcp_server.clients.itervalues():
1198
mandos_server = MandosServer()
1199
1200
for client in clients:
2455
1201
if use_dbus:
2456
1202
# Emit D-Bus signal
2457
mandos_dbus_service.ClientAdded(client.dbus_object_path)
2458
# Need to initiate checking of clients
2459
if client.enabled:
2460
client.init_checker()
1203
mandos_server.ClientAdded(client.dbus_object_path,
1204
client.GetAllProperties())
1205
client.enable()
2461
1206
2462
1207
tcp_server.enable()
2463
1208
tcp_server.server_activate()
2465
1210
# Find out what port we got
2466
1211
service.port = tcp_server.socket.getsockname()[1]
2467
1212
if use_ipv6:
2468
logger.info("Now listening on address %r, port %d,"
1213
logger.info(u"Now listening on address %r, port %d,"
2469
1214
" flowinfo %d, scope_id %d"
2470
1215
% tcp_server.socket.getsockname())
2471
1216
else: # IPv4
2472
logger.info("Now listening on address %r, port %d"
1217
logger.info(u"Now listening on address %r, port %d"
2473
1218
% tcp_server.socket.getsockname())
2474
1219
2475
1220
#service.interface = tcp_server.socket.getsockname()[3]
2476
1221
2477
1222
try:
2478
1223
# From the Avahi example code
1224
server.connect_to_signal("StateChanged", server_state_changed)
2479
1225
try:
2480
service.activate()
2481
except dbus.exceptions.DBusException as error:
2482
logger.critical("DBusException: %s", error)
2483
cleanup()
1226
server_state_changed(server.GetState())
1227
except dbus.exceptions.DBusException, error:
1228
logger.critical(u"DBusException: %s", error)
2484
1229
sys.exit(1)
2485
1230
# End of Avahi example code
2486
1231
2489
1234
(tcp_server.handle_request
2490
1235
(*args[2:], **kwargs) or True))
2491
1236
2492
logger.debug("Starting main loop")
1237
logger.debug(u"Starting main loop")
2493
1238
main_loop.run()
2494
except AvahiError as error:
2495
logger.critical("AvahiError: %s", error)
2496
cleanup()
1239
except AvahiError, error:
1240
logger.critical(u"AvahiError: %s", error)
2497
1241
sys.exit(1)
2498
1242
except KeyboardInterrupt:
2499
1243
if debug:
2500
print("", file=sys.stderr)
1244
print >> sys.stderr
2501
1245
logger.debug("Server received KeyboardInterrupt")
2502
1246
logger.debug("Server exiting")
2503
# Must run before the D-Bus bus name gets deregistered
2504
cleanup()
2505
1247
2506
1248
if __name__ == '__main__':
2507
1249
main()
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0